21 Nov '25
Cheng Shao pushed new branch wip/ghc-9.12-fix-wasm at Glasgow Haskell Compiler / GHC
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[Git][ghc/ghc][wip/amg/castz] Try a better heuristic in ds_hs_wrapper
by Adam Gundry (＠adamgundry) 21 Nov '25
by Adam Gundry (＠adamgundry) 21 Nov '25
21 Nov '25
Adam Gundry pushed to branch wip/amg/castz at Glasgow Haskell Compiler / GHC
Commits:
df288bc2 by Adam Gundry at 2025-11-21T16:02:22+00:00
Try a better heuristic in ds_hs_wrapper
- - - - -
2 changed files:
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Utils.hs
Changes:
=====================================
compiler/GHC/HsToCore/Binds.hs
=====================================
@@ -59,8 +59,6 @@ import GHC.Core.Coercion
import GHC.Core.Rules
import GHC.Core.Ppr( pprCoreBinders )
import GHC.Core.TyCo.Compare( eqType )
-import GHC.Core.TyCo.FVs
-import GHC.Core.TyCo.Rep
import GHC.Builtin.Names
import GHC.Builtin.Types ( naturalTy, typeSymbolKind, charTy )
@@ -1611,10 +1609,8 @@ ds_hs_wrapper hs_wrap
go (WpTyLam tv) k = k $ Lam tv
go (WpCast co) k = assert (coercionRole co == Representational) $
do { zap_casts <- hasZapCasts <$> getDynFlags
- -- AMG TODO: clean this up if it helps T5030
- -- TODO: T15703 gets much worse with this, why? Need heuristic?
; if zap_casts
- then k $ \e -> if isSmallCo co then mkCastDs e co else Cast e (ZCoercion (coercionRKind co) (shallowCoVarsOfCo co))
+ then k $ \e -> mkCastDs_may_zap e co
else k $ \e -> mkCastDs e co
}
go (WpEvApp tm) k = do { core_tm <- dsEvTerm tm
@@ -1632,25 +1628,6 @@ ds_hs_wrapper hs_wrap
arg = w1 (Var x)
in k (\e -> (Lam x (w2 (app e arg)))) }
-isSmallCo :: Coercion -> Bool
-isSmallCo Refl{} = True
-isSmallCo GRefl{} = True
-isSmallCo AxiomCo{} = True
-isSmallCo CoVarCo{} = True
-isSmallCo (SymCo co) = isSmallCo co
-isSmallCo (KindCo co) = isSmallCo co
-isSmallCo (SubCo co) = isSmallCo co
-isSmallCo TyConAppCo{} = False
-isSmallCo AppCo{} = False
-isSmallCo ForAllCo{} = False
-isSmallCo FunCo{} = False
-isSmallCo UnivCo{} = False
-isSmallCo TransCo{} = False
-isSmallCo SelCo{} = False
-isSmallCo LRCo{} = False
-isSmallCo InstCo{} = False
-isSmallCo HoleCo{} = False
-
--------------------------------------
dsTcEvBinds_s :: [TcEvBinds] -> ([CoreBind] -> DsM a) -> DsM a
dsTcEvBinds_s [] k = k []
=====================================
compiler/GHC/HsToCore/Utils.hs
=====================================
@@ -28,7 +28,7 @@ module GHC.HsToCore.Utils (
mkCoPrimCaseMatchResult, mkCoAlgCaseMatchResult, mkCoSynCaseMatchResult,
wrapBind, wrapBinds,
- mkErrorAppDs, mkCastDs, mkFailExpr,
+ mkErrorAppDs, mkCastDs, mkCastDs_may_zap, mkFailExpr,
seqVar,
@@ -64,6 +64,7 @@ import GHC.Core.PatSyn
import GHC.Core.Type
import GHC.Core.Coercion
import GHC.Core.TyCo.Rep( Scaled(..) )
+import GHC.Core.TyCo.FVs
import GHC.Builtin.Types
import GHC.Core.ConLike
import GHC.Types.Unique.Set
@@ -476,6 +477,15 @@ mkCastDs :: CoreExpr -> Coercion -> CoreExpr
mkCastDs e co | isReflCo co = e
| otherwise = Cast e (CCoercion co)
+mkCastDs_may_zap :: CoreExpr -> Coercion -> CoreExpr
+mkCastDs_may_zap e co
+ | isReflCo co = e
+ | coercionSize co > castCoercionSize zapped_co = Cast e zapped_co
+ | otherwise = Cast e (CCoercion co)
+ where
+ zapped_co = ZCoercion (coercionRKind co) (shallowCoVarsOfCo co)
+
+
{-
************************************************************************
* *
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[Git][ghc/ghc][wip/fix-eventlog-flush-deadlock] rts: Fix a deadlock with eventlog flush interval and RTS shutdown
by Matthew Pickering (＠mpickering) 21 Nov '25
by Matthew Pickering (＠mpickering) 21 Nov '25
21 Nov '25
Matthew Pickering pushed to branch wip/fix-eventlog-flush-deadlock at Glasgow Haskell Compiler / GHC
Commits:
14a4fb8d by Matthew Pickering at 2025-11-21T12:10:28+00:00
rts: Fix a deadlock with eventlog flush interval and RTS shutdown
The ghc_ticker thread attempts to flush at the eventlog tick interval, this requires
waiting to take all capabilities.
At the same time, the main thread is shutting down, the schedule is
stopped and then we wait for the ticker thread to finish.
Therefore we are deadlocked.
The solution is to use `newBoundTask/exitMyTask`, so that flushing can
cooperate with the scheduler shutdown.
Fixes #26573
- - - - -
2 changed files:
- rts/eventlog/EventLog.c
- testsuite/tests/rts/all.T
Changes:
=====================================
rts/eventlog/EventLog.c
=====================================
@@ -491,13 +491,7 @@ endEventLogging(void)
eventlog_enabled = false;
- // Flush all events remaining in the buffers.
- //
- // N.B. Don't flush if shutting down: this was done in
- // finishCapEventLogging and the capabilities have already been freed.
- if (getSchedState() != SCHED_SHUTTING_DOWN) {
- flushEventLog(NULL);
- }
+ flushEventLog(NULL);
ACQUIRE_LOCK(&eventBufMutex);
@@ -1626,15 +1620,24 @@ void flushEventLog(Capability **cap USED_IF_THREADS)
return;
}
+ // N.B. Don't flush if shutting down: this was done in
+ // finishCapEventLogging and the capabilities have already been freed.
+ // This can also race against the shutdown if the flush is triggered by the
+ // ticker thread. (#26573)
+ if (getSchedState() == SCHED_SHUTTING_DOWN) {
+ return;
+ }
+
ACQUIRE_LOCK(&eventBufMutex);
printAndClearEventBuf(&eventBuf);
RELEASE_LOCK(&eventBufMutex);
#if defined(THREADED_RTS)
- Task *task = getMyTask();
+ Task *task = newBoundTask();
stopAllCapabilitiesWith(cap, task, SYNC_FLUSH_EVENT_LOG);
flushAllCapsEventsBufs();
releaseAllCapabilities(getNumCapabilities(), cap ? *cap : NULL, task);
+ exitMyTask();
#else
flushLocalEventsBuf(getCapability(0));
#endif
=====================================
testsuite/tests/rts/all.T
=====================================
@@ -2,6 +2,11 @@ test('testblockalloc',
[c_src, only_ways(['normal','threaded1']), extra_run_opts('+RTS -I0')],
compile_and_run, [''])
+test('numeric_version_eventlog_flush',
+ [ignore_stdout, req_ghc_with_threaded_rts],
+ run_command,
+ ['{compiler} --numeric-version +RTS -l --eventlog-flush-interval=1 -RTS'])
+
test('testmblockalloc',
[c_src, only_ways(['normal','threaded1']), extra_run_opts('+RTS -I0 -xr0.125T'),
when(arch('wasm32'), skip)], # MBlocks can't be freed on wasm32, see Note [Megablock allocator on wasm] in rts
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/14a4fb8df33802d9fdf29b8156b386f…
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20 Nov '25
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
6b42232c by sheaf at 2025-11-20T17:34:35-05:00
Mark T26410_ffi as fragile on Windows
As seen in #26595, this test intermittently fails on Windows.
This commit marks it as fragile, until we get around to fixing it.
- - - - -
1 changed file:
- testsuite/tests/simd/should_run/all.T
Changes:
=====================================
testsuite/tests/simd/should_run/all.T
=====================================
@@ -175,6 +175,7 @@ test('T26410_ffi'
, [ only_ways(llvm_ways) # SIMD NCG TODO: support 512-bit wide vectors
, unless(arch('x86_64') and have_cpu_feature('avx512f'), skip)
, extra_hc_opts('-mavx512f -optc -mavx512f -optlc -mcpu=penryn')
+ , when(opsys('mingw32'), fragile(26595))
]
, compile_and_run if have_cpu_feature('avx512f') else compile
, ['T26410_ffi_c.c'])
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/6b42232c34273137b194c41b3c968be…
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20 Nov '25
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
08bbc028 by Rodrigo Mesquita at 2025-11-20T17:33:54-05:00
Add tests for #23973 and #26565
These were fixed by 4af4f0f070f83f948e49ad5d7835fd91b8d3f0e6 in !10417
- - - - -
7 changed files:
- + testsuite/tests/bytecode/T23973.hs
- + testsuite/tests/bytecode/T23973.script
- + testsuite/tests/bytecode/T23973.stdout
- + testsuite/tests/bytecode/T26565.hs
- + testsuite/tests/bytecode/T26565.script
- + testsuite/tests/bytecode/T26565.stdout
- testsuite/tests/bytecode/all.T
Changes:
=====================================
testsuite/tests/bytecode/T23973.hs
=====================================
@@ -0,0 +1,17 @@
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE LinearTypes #-}
+
+module Main (main) where
+
+data Ur a where
+ Ur :: a -> Ur a
+
+unur :: Ur a -> a
+unur (Ur a) = a
+
+segvGHCi :: Ur ()
+segvGHCi = Ur $ ()
+
+main :: IO ()
+main = print (unur segvGHCi)
+
=====================================
testsuite/tests/bytecode/T23973.script
=====================================
@@ -0,0 +1,2 @@
+:l T23973.hs
+main
=====================================
testsuite/tests/bytecode/T23973.stdout
=====================================
@@ -0,0 +1 @@
+()
=====================================
testsuite/tests/bytecode/T26565.hs
=====================================
@@ -0,0 +1,6 @@
+{-# LANGUAGE LinearTypes #-}
+module Test where
+
+data Ur a where
+ Ur :: a -> Ur a
+
=====================================
testsuite/tests/bytecode/T26565.script
=====================================
@@ -0,0 +1,3 @@
+:l T26565
+Ur y = (\x -> Ur $ replicate 5 'a') 3
+y
=====================================
testsuite/tests/bytecode/T26565.stdout
=====================================
@@ -0,0 +1 @@
+"aaaaa"
=====================================
testsuite/tests/bytecode/all.T
=====================================
@@ -6,6 +6,8 @@ test('T25975', extra_ways(ghci_ways), compile_and_run,
# Some of the examples work more robustly with these flags
['-fno-break-points -fno-full-laziness'])
+test('T26565', extra_files(["T26565.hs"]), ghci_script, ['T26565.script'])
+test('T23973', extra_files(["T23973.hs"]), ghci_script, ['T23973.script'])
+
# Nullary data constructors
test('T26216', extra_files(["T26216_aux.hs"]), ghci_script, ['T26216.script'])
-
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[Git][ghc/ghc][master] Build external interpreter program on demand (#24731)
by Marge Bot (＠marge-bot) 20 Nov '25
by Marge Bot (＠marge-bot) 20 Nov '25
20 Nov '25
Marge Bot pushed to branch master at Glasgow Haskell Compiler / GHC
Commits:
55eab80d by Sylvain Henry at 2025-11-20T17:33:13-05:00
Build external interpreter program on demand (#24731)
This patch teaches GHC how to build the external interpreter program
when it is missing. As long as we have the `ghci` library, doing this is
trivial so most of this patch is refactoring for doing it sanely.
- - - - -
21 changed files:
- compiler/GHC.hs
- + compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Config/Linker.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Linker/Config.hs
- compiler/GHC/Linker/Dynamic.hs
- + compiler/GHC/Linker/Executable.hs
- − compiler/GHC/Linker/ExtraObj.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/MacOS.hs
- compiler/GHC/Linker/Static.hs
- compiler/GHC/Linker/Windows.hs
- + compiler/GHC/Runtime/Interpreter/C.hs
- + compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/SysTools/Tasks.hs
- compiler/ghc.cabal.in
- + testsuite/tests/driver/T24731.hs
- testsuite/tests/driver/all.T
- utils/iserv/iserv.cabal.in
Changes:
=====================================
compiler/GHC.hs
=====================================
@@ -337,7 +337,6 @@ module GHC (
import GHC.Prelude hiding (init)
import GHC.Platform
-import GHC.Platform.Ways
import GHC.Driver.Phases ( Phase(..), isHaskellSrcFilename
, isSourceFilename, startPhase )
@@ -351,7 +350,6 @@ import GHC.Driver.Backend
import GHC.Driver.Config.Finder (initFinderOpts)
import GHC.Driver.Config.Parser (initParserOpts)
import GHC.Driver.Config.Logger (initLogFlags)
-import GHC.Driver.Config.StgToJS (initStgToJSConfig)
import GHC.Driver.Config.Diagnostic
import GHC.Driver.Main
import GHC.Driver.Make
@@ -360,10 +358,11 @@ import GHC.Driver.Monad
import GHC.Driver.Ppr
import GHC.ByteCode.Types
-import qualified GHC.Linker.Loader as Loader
import GHC.Runtime.Loader
import GHC.Runtime.Eval
import GHC.Runtime.Interpreter
+import GHC.Runtime.Interpreter.Init
+import GHC.Driver.Config.Interpreter
import GHC.Runtime.Context
import GHCi.RemoteTypes
@@ -439,10 +438,8 @@ import GHC.Unit.Module.ModSummary
import GHC.Unit.Module.Graph
import GHC.Unit.Home.ModInfo
import qualified GHC.Unit.Home.Graph as HUG
-import GHC.Settings
import Control.Applicative ((<|>))
-import Control.Concurrent
import Control.Monad
import Control.Monad.Catch as MC
import Data.Foldable
@@ -715,98 +712,16 @@ setTopSessionDynFlags :: GhcMonad m => DynFlags -> m ()
setTopSessionDynFlags dflags = do
hsc_env <- getSession
logger <- getLogger
- lookup_cache <- liftIO $ mkInterpSymbolCache
-
- -- see Note [Target code interpreter]
- interp <- if
-#if !defined(wasm32_HOST_ARCH)
- -- Wasm dynamic linker
- | ArchWasm32 <- platformArch $ targetPlatform dflags
- -> do
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- dyld <- liftIO $ makeAbsolute $ topDir dflags </> "dyld.mjs"
- libdir <- liftIO $ last <$> Loader.getGccSearchDirectory logger dflags "libraries"
- let profiled = ways dflags `hasWay` WayProf
- way_tag = if profiled then "_p" else ""
- let cfg =
- WasmInterpConfig
- { wasmInterpDyLD = dyld,
- wasmInterpLibDir = libdir,
- wasmInterpOpts = getOpts dflags opt_i,
- wasmInterpBrowser = gopt Opt_GhciBrowser dflags,
- wasmInterpBrowserHost = ghciBrowserHost dflags,
- wasmInterpBrowserPort = ghciBrowserPort dflags,
- wasmInterpBrowserRedirectWasiConsole = gopt Opt_GhciBrowserRedirectWasiConsole dflags,
- wasmInterpBrowserPuppeteerLaunchOpts = ghciBrowserPuppeteerLaunchOpts dflags,
- wasmInterpBrowserPlaywrightBrowserType = ghciBrowserPlaywrightBrowserType dflags,
- wasmInterpBrowserPlaywrightLaunchOpts = ghciBrowserPlaywrightLaunchOpts dflags,
- wasmInterpTargetPlatform = targetPlatform dflags,
- wasmInterpProfiled = profiled,
- wasmInterpHsSoSuffix = way_tag ++ dynLibSuffix (ghcNameVersion dflags),
- wasmInterpUnitState = ue_homeUnitState $ hsc_unit_env hsc_env
- }
- pure $ Just $ Interp (ExternalInterp $ ExtWasm $ ExtInterpState cfg s) loader lookup_cache
-#endif
-
- -- JavaScript interpreter
- | ArchJavaScript <- platformArch (targetPlatform dflags)
- -> do
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- let cfg = JSInterpConfig
- { jsInterpNodeConfig = defaultNodeJsSettings
- , jsInterpScript = topDir dflags </> "ghc-interp.js"
- , jsInterpTmpFs = hsc_tmpfs hsc_env
- , jsInterpTmpDir = tmpDir dflags
- , jsInterpLogger = hsc_logger hsc_env
- , jsInterpCodegenCfg = initStgToJSConfig dflags
- , jsInterpUnitEnv = hsc_unit_env hsc_env
- , jsInterpFinderOpts = initFinderOpts dflags
- , jsInterpFinderCache = hsc_FC hsc_env
- }
- return (Just (Interp (ExternalInterp (ExtJS (ExtInterpState cfg s))) loader lookup_cache))
-
- -- external interpreter
- | gopt Opt_ExternalInterpreter dflags
- -> do
- let
- prog = pgm_i dflags ++ flavour
- profiled = ways dflags `hasWay` WayProf
- dynamic = ways dflags `hasWay` WayDyn
- flavour
- | profiled && dynamic = "-prof-dyn"
- | profiled = "-prof"
- | dynamic = "-dyn"
- | otherwise = ""
- msg = text "Starting " <> text prog
- tr <- if verbosity dflags >= 3
- then return (logInfo logger $ withPprStyle defaultDumpStyle msg)
- else return (pure ())
- let
- conf = IServConfig
- { iservConfProgram = prog
- , iservConfOpts = getOpts dflags opt_i
- , iservConfProfiled = profiled
- , iservConfDynamic = dynamic
- , iservConfHook = createIservProcessHook (hsc_hooks hsc_env)
- , iservConfTrace = tr
- }
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- return (Just (Interp (ExternalInterp (ExtIServ (ExtInterpState conf s))) loader lookup_cache))
-
- -- Internal interpreter
- | otherwise
- ->
-#if defined(HAVE_INTERNAL_INTERPRETER)
- do
- loader <- liftIO Loader.uninitializedLoader
- return (Just (Interp InternalInterp loader lookup_cache))
-#else
- return Nothing
-#endif
-
+ let platform = targetPlatform dflags
+ let unit_env = hsc_unit_env hsc_env
+ let tmpfs = hsc_tmpfs hsc_env
+ let finder_cache = hsc_FC hsc_env
+ interp_opts' <- liftIO $ initInterpOpts dflags
+ let interp_opts = interp_opts'
+ { interpCreateProcess = createIservProcessHook (hsc_hooks hsc_env)
+ }
+
+ interp <- liftIO $ initInterpreter tmpfs logger platform finder_cache unit_env interp_opts
modifySession $ \h -> hscSetFlags dflags
h{ hsc_IC = (hsc_IC h){ ic_dflags = dflags }
=====================================
compiler/GHC/Driver/Config/Interpreter.hs
=====================================
@@ -0,0 +1,46 @@
+module GHC.Driver.Config.Interpreter
+ ( initInterpOpts
+ )
+where
+
+import GHC.Prelude
+import GHC.Runtime.Interpreter.Init
+import GHC.Driver.DynFlags
+import GHC.Driver.Session
+import GHC.Driver.Config.Finder
+import GHC.Driver.Config.StgToJS
+import GHC.SysTools.Tasks
+import GHC.Linker.Executable
+
+import System.FilePath
+import System.Directory
+
+initInterpOpts :: DynFlags -> IO InterpOpts
+initInterpOpts dflags = do
+ wasm_dyld <- makeAbsolute $ topDir dflags </> "dyld.mjs"
+ js_interp <- makeAbsolute $ topDir dflags </> "ghc-interp.js"
+ pure $ InterpOpts
+ { interpExternal = gopt Opt_ExternalInterpreter dflags
+ , interpProg = pgm_i dflags
+ , interpOpts = getOpts dflags opt_i
+ , interpWays = ways dflags
+ , interpNameVer = ghcNameVersion dflags
+ , interpCreateProcess = Nothing
+ , interpWasmDyld = wasm_dyld
+ , interpBrowser = gopt Opt_GhciBrowser dflags
+ , interpBrowserHost = ghciBrowserHost dflags
+ , interpBrowserPort = ghciBrowserPort dflags
+ , interpBrowserRedirectWasiConsole = gopt Opt_GhciBrowserRedirectWasiConsole dflags
+ , interpBrowserPuppeteerLaunchOpts = ghciBrowserPuppeteerLaunchOpts dflags
+ , interpBrowserPlaywrightBrowserType = ghciBrowserPlaywrightBrowserType dflags
+ , interpBrowserPlaywrightLaunchOpts = ghciBrowserPlaywrightLaunchOpts dflags
+ , interpJsInterp = js_interp
+ , interpTmpDir = tmpDir dflags
+ , interpJsCodegenCfg = initStgToJSConfig dflags
+ , interpFinderOpts = initFinderOpts dflags
+ , interpVerbosity = verbosity dflags
+ , interpLdConfig = configureLd dflags
+ , interpCcConfig = configureCc dflags
+ , interpExecutableLinkOpts = initExecutableLinkOpts dflags
+ }
+
=====================================
compiler/GHC/Driver/Config/Linker.hs
=====================================
@@ -10,6 +10,7 @@ import GHC.Linker.Config
import GHC.Driver.DynFlags
import GHC.Driver.Session
+import GHC.Settings
import Data.List (isPrefixOf)
@@ -52,6 +53,8 @@ initLinkerConfig dflags =
, linkerOptionsPost = post_args
, linkerTempDir = tmpDir dflags
, linkerFilter = ld_filter
+ , linkerSupportsCompactUnwind = toolSettings_ldSupportsCompactUnwind (toolSettings dflags)
+ , linkerIsGnuLd = toolSettings_ldIsGnuLd (toolSettings dflags)
}
{- Note [Solaris linker]
=====================================
compiler/GHC/Driver/DynFlags.hs
=====================================
@@ -28,7 +28,7 @@ module GHC.Driver.DynFlags (
ParMakeCount(..),
ways,
HasDynFlags(..), ContainsDynFlags(..),
- RtsOptsEnabled(..),
+ RtsOptsEnabled(..), haveRtsOptsFlags,
GhcMode(..), isOneShot,
GhcLink(..), isNoLink,
PackageFlag(..), PackageArg(..), ModRenaming(..),
@@ -902,6 +902,13 @@ data RtsOptsEnabled
| RtsOptsAll
deriving (Show)
+haveRtsOptsFlags :: DynFlags -> Bool
+haveRtsOptsFlags dflags =
+ isJust (rtsOpts dflags) || case rtsOptsEnabled dflags of
+ RtsOptsSafeOnly -> False
+ _ -> True
+
+
-- | Are we building with @-fPIE@ or @-fPIC@ enabled?
positionIndependent :: DynFlags -> Bool
positionIndependent dflags = gopt Opt_PIC dflags || gopt Opt_PIE dflags
=====================================
compiler/GHC/Driver/Pipeline.hs
=====================================
@@ -71,7 +71,7 @@ import GHC.SysTools
import GHC.SysTools.Cpp
import GHC.Utils.TmpFs
-import GHC.Linker.ExtraObj
+import GHC.Linker.Executable
import GHC.Linker.Static
import GHC.Linker.Static.Utils
import GHC.Linker.Types
@@ -444,7 +444,9 @@ link' logger tmpfs fc dflags unit_env batch_attempt_linking mHscMessager hpt
case ghcLink dflags of
LinkBinary
| backendUseJSLinker (backend dflags) -> linkJSBinary logger tmpfs fc dflags unit_env obj_files pkg_deps
- | otherwise -> linkBinary logger tmpfs dflags unit_env obj_files pkg_deps
+ | otherwise -> do
+ let opts = initExecutableLinkOpts dflags
+ linkExecutable logger tmpfs opts unit_env obj_files pkg_deps
LinkStaticLib -> linkStaticLib logger dflags unit_env obj_files pkg_deps
LinkDynLib -> linkDynLibCheck logger tmpfs dflags unit_env obj_files pkg_deps
other -> panicBadLink other
@@ -511,7 +513,8 @@ linkingNeeded logger dflags unit_env staticLink linkables pkg_deps = do
if not (null lib_errs) || any (t <) lib_times
then return $ needsRecompileBecause LibraryChanged
else do
- res <- checkLinkInfo logger dflags unit_env pkg_deps exe_file
+ let opts = initExecutableLinkOpts dflags
+ res <- checkLinkInfo logger opts unit_env pkg_deps exe_file
if res
then return $ needsRecompileBecause FlagsChanged
else return UpToDate
@@ -585,7 +588,9 @@ doLink hsc_env o_files = do
LinkBinary
| backendUseJSLinker (backend dflags)
-> linkJSBinary logger tmpfs fc dflags unit_env o_files []
- | otherwise -> linkBinary logger tmpfs dflags unit_env o_files []
+ | otherwise -> do
+ let opts = initExecutableLinkOpts dflags
+ linkExecutable logger tmpfs opts unit_env o_files []
LinkStaticLib -> linkStaticLib logger dflags unit_env o_files []
LinkDynLib -> linkDynLibCheck logger tmpfs dflags unit_env o_files []
LinkMergedObj
=====================================
compiler/GHC/Driver/Pipeline/Execute.hs
=====================================
@@ -15,6 +15,7 @@ import Control.Monad
import Control.Monad.IO.Class
import Control.Monad.Catch
import GHC.Driver.Hooks
+import GHC.Driver.DynFlags
import Control.Monad.Trans.Reader
import GHC.Driver.Pipeline.Monad
import GHC.Driver.Pipeline.Phases
@@ -74,7 +75,6 @@ import GHC.CmmToLlvm.Version.Type (LlvmVersion (..))
import {-# SOURCE #-} GHC.Driver.Pipeline (compileForeign, compileEmptyStub)
import GHC.Settings
import System.IO
-import GHC.Linker.ExtraObj
import GHC.Linker.Dynamic
import GHC.Utils.Panic
import GHC.Utils.Touch
@@ -416,6 +416,7 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
let unit_env = hsc_unit_env hsc_env
let home_unit = hsc_home_unit_maybe hsc_env
let tmpfs = hsc_tmpfs hsc_env
+ let tmpdir = tmpDir dflags
let platform = ue_platform unit_env
let hcc = cc_phase `eqPhase` HCc
@@ -437,7 +438,7 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
let include_paths = include_paths_quote ++ include_paths_global
let gcc_extra_viac_flags = extraGccViaCFlags dflags
- let pic_c_flags = picCCOpts dflags
+ let cc_config = configureCc dflags
let verbFlags = getVerbFlags dflags
@@ -486,14 +487,14 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
ghcVersionH <- getGhcVersionIncludeFlags dflags unit_env
withAtomicRename output_fn $ \temp_outputFilename ->
- GHC.SysTools.runCc (phaseForeignLanguage cc_phase) logger tmpfs dflags (
+ GHC.SysTools.runCc (phaseForeignLanguage cc_phase) logger tmpfs tmpdir cc_config (
[ GHC.SysTools.Option "-c"
, GHC.SysTools.FileOption "" input_fn
, GHC.SysTools.Option "-o"
, GHC.SysTools.FileOption "" temp_outputFilename
]
++ map GHC.SysTools.Option (
- pic_c_flags
+ (ccPicOpts cc_config)
-- See Note [Produce big objects on Windows]
++ [ "-Wa,-mbig-obj"
@@ -1149,7 +1150,8 @@ joinObjectFiles hsc_env o_files output_fn
| otherwise = do
withAtomicRename output_fn $ \tmp_ar ->
- liftIO $ runAr logger dflags Nothing $ map Option $ ["qc" ++ dashL, tmp_ar] ++ o_files
+ let ar_opts = configureAr dflags
+ in liftIO $ runAr logger ar_opts Nothing $ map Option $ ["qc" ++ dashL, tmp_ar] ++ o_files
where
dashLSupported = sArSupportsDashL (settings dflags)
dashL = if dashLSupported then "L" else ""
=====================================
compiler/GHC/Linker/Config.hs
=====================================
@@ -23,5 +23,7 @@ data LinkerConfig = LinkerConfig
, linkerOptionsPost :: [Option] -- ^ Linker options (after user options)
, linkerTempDir :: TempDir -- ^ Temporary directory to use
, linkerFilter :: [String] -> [String] -- ^ Output filter
+ , linkerSupportsCompactUnwind :: !Bool -- ^ Does the linker support compact unwind
+ , linkerIsGnuLd :: !Bool -- ^ Is it GNU LD (used for gc-sections support)
}
=====================================
compiler/GHC/Linker/Dynamic.hs
=====================================
@@ -12,6 +12,7 @@ import GHC.Prelude
import GHC.Platform
import GHC.Platform.Ways
import GHC.Settings (ToolSettings(toolSettings_ldSupportsSingleModule))
+import GHC.SysTools.Tasks
import GHC.Driver.Config.Linker
import GHC.Driver.Session
@@ -207,8 +208,10 @@ linkDynLib logger tmpfs dflags0 unit_env o_files dep_packages
++ [ Option "-Wl,-dead_strip_dylibs", Option "-Wl,-headerpad,8000" ]
)
-- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
- when (gopt Opt_RPath dflags) $
- runInjectRPaths logger (toolSettings dflags) pkg_lib_paths output_fn
+ when (gopt Opt_RPath dflags) $ do
+ let otool_opts = configureOtool dflags
+ let install_name_opts = configureInstallName dflags
+ runInjectRPaths logger otool_opts install_name_opts pkg_lib_paths output_fn
_ -> do
-------------------------------------------------------------------
-- Making a DSO
=====================================
compiler/GHC/Linker/Executable.hs
=====================================
@@ -0,0 +1,534 @@
+-- | Linking executables
+module GHC.Linker.Executable
+ ( linkExecutable
+ , ExecutableLinkOpts (..)
+ , initExecutableLinkOpts
+ -- RTS Opts
+ , RtsOptsEnabled (..)
+ -- * Link info
+ , LinkInfo (..)
+ , initLinkInfo
+ , checkLinkInfo
+ , ghcLinkInfoSectionName
+ , ghcLinkInfoNoteName
+ , platformSupportsSavingLinkOpts
+ )
+where
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Platform.Ways
+
+import GHC.Unit
+import GHC.Unit.Env
+
+import GHC.Utils.Asm
+import GHC.Utils.Error
+import GHC.Utils.Misc
+import GHC.Utils.Outputable as Outputable
+import GHC.Utils.Logger
+import GHC.Utils.TmpFs
+
+import GHC.Driver.Session
+import GHC.Driver.Config.Linker
+
+import qualified GHC.Data.ShortText as ST
+
+import GHC.SysTools
+import GHC.SysTools.Elf
+import GHC.Linker.Config
+import GHC.Linker.Unit
+import GHC.Linker.MacOS
+import GHC.Linker.Windows
+import GHC.Linker.Dynamic (libmLinkOpts)
+import GHC.Linker.External (runLink)
+import GHC.Linker.Static.Utils (exeFileName)
+
+import Control.Monad
+import Data.Maybe
+import System.FilePath
+import System.Directory
+
+data ExecutableLinkOpts = ExecutableLinkOpts
+ { leOutputFile :: Maybe FilePath
+ , leNameVersion :: GhcNameVersion
+ , leWays :: Ways
+ , leDynLibLoader :: DynLibLoader
+ , leRelativeDynlibPaths :: !Bool
+ , leUseXLinkerRPath :: !Bool
+ , leSingleLibFolder :: !Bool
+ , leWholeArchiveHsLibs :: !Bool
+ , leGenManifest :: !Bool
+ , leRPath :: !Bool
+ , leCompactUnwind :: !Bool
+ , leLibraryPaths :: [String]
+ , leFrameworkOpts :: FrameworkOpts
+ , leManifestOpts :: ManifestOpts
+ , leLinkerConfig :: LinkerConfig
+ , leOtoolConfig :: OtoolConfig
+ , leCcConfig :: CcConfig
+ , leInstallNameConfig :: InstallNameConfig
+ , leInputs :: [Option]
+ , lePieOpts :: [String]
+ , leTempDir :: TempDir
+ , leVerbFlags :: [String]
+ , leNoHsMain :: !Bool
+ , leMainSymbol :: String
+ , leRtsOptsEnabled :: !RtsOptsEnabled
+ , leRtsOptsSuggestions :: !Bool
+ , leKeepCafs :: !Bool
+ , leRtsOpts :: Maybe String
+ }
+
+initExecutableLinkOpts :: DynFlags -> ExecutableLinkOpts
+initExecutableLinkOpts dflags =
+ let
+ platform = targetPlatform dflags
+ os = platformOS platform
+ in ExecutableLinkOpts
+ { leOutputFile = outputFile_ dflags
+ , leNameVersion = ghcNameVersion dflags
+ , leWays = ways dflags
+ , leDynLibLoader = dynLibLoader dflags
+ , leRelativeDynlibPaths = gopt Opt_RelativeDynlibPaths dflags
+ , leUseXLinkerRPath = useXLinkerRPath dflags os
+ , leSingleLibFolder = gopt Opt_SingleLibFolder dflags
+ , leWholeArchiveHsLibs = gopt Opt_WholeArchiveHsLibs dflags
+ , leGenManifest = gopt Opt_GenManifest dflags
+ , leRPath = gopt Opt_RPath dflags
+ , leCompactUnwind = gopt Opt_CompactUnwind dflags
+ , leLibraryPaths = libraryPaths dflags
+ , leFrameworkOpts = initFrameworkOpts dflags
+ , leManifestOpts = initManifestOpts dflags
+ , leLinkerConfig = initLinkerConfig dflags
+ , leCcConfig = configureCc dflags
+ , leOtoolConfig = configureOtool dflags
+ , leInstallNameConfig = configureInstallName dflags
+ , leInputs = ldInputs dflags
+ , lePieOpts = pieCCLDOpts dflags
+ , leTempDir = tmpDir dflags
+ , leVerbFlags = getVerbFlags dflags
+ , leNoHsMain = gopt Opt_NoHsMain dflags
+ , leMainSymbol = "ZCMain_main"
+ , leRtsOptsEnabled = rtsOptsEnabled dflags
+ , leRtsOptsSuggestions = rtsOptsSuggestions dflags
+ , leKeepCafs = gopt Opt_KeepCAFs dflags
+ , leRtsOpts = rtsOpts dflags
+ }
+
+leHaveRtsOptsFlags :: ExecutableLinkOpts -> Bool
+leHaveRtsOptsFlags opts =
+ isJust (leRtsOpts opts)
+ || case leRtsOptsEnabled opts of
+ RtsOptsSafeOnly -> False
+ _ -> True
+
+linkExecutable :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
+linkExecutable logger tmpfs opts unit_env o_files dep_units = do
+ let static_link = False
+ let platform = ue_platform unit_env
+ unit_state = ue_homeUnitState unit_env
+ verbFlags = leVerbFlags opts
+ arch_os = platformArchOS platform
+ output_fn = exeFileName arch_os static_link (leOutputFile opts)
+ namever = leNameVersion opts
+ -- For the wasm target, when ghc is invoked with -dynamic,
+ -- when linking the final .wasm binary we must still ensure
+ -- the static archives are selected. Otherwise wasm-ld would
+ -- fail to find and link the .so library dependencies. wasm-ld
+ -- can link PIC objects into static .wasm binaries fine, so we
+ -- only adjust the ways in the final linking step, and only
+ -- when linking .wasm binary (which is supposed to be fully
+ -- static), not when linking .so shared libraries.
+ ways_
+ | ArchWasm32 <- platformArch platform = removeWay WayDyn $ leWays opts
+ | otherwise = leWays opts
+
+ full_output_fn <- if isAbsolute output_fn
+ then return output_fn
+ else do d <- getCurrentDirectory
+ return $ normalise (d </> output_fn)
+
+ -- get the full list of packages to link with, by combining the
+ -- explicit packages with the auto packages and all of their
+ -- dependencies, and eliminating duplicates.
+ pkgs <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_units)
+ let pkg_lib_paths = collectLibraryDirs ways_ pkgs
+ let pkg_lib_path_opts = concatMap get_pkg_lib_path_opts pkg_lib_paths
+ get_pkg_lib_path_opts l
+ | osElfTarget (platformOS platform) &&
+ leDynLibLoader opts == SystemDependent &&
+ ways_ `hasWay` WayDyn
+ = let libpath = if leRelativeDynlibPaths opts
+ then "$ORIGIN" </>
+ (l `makeRelativeTo` full_output_fn)
+ else l
+ -- See Note [-Xlinker -rpath vs -Wl,-rpath]
+ rpath = if leUseXLinkerRPath opts
+ then ["-Xlinker", "-rpath", "-Xlinker", libpath]
+ else []
+ -- Solaris 11's linker does not support -rpath-link option. It silently
+ -- ignores it and then complains about next option which is -l<some
+ -- dir> as being a directory and not expected object file, E.g
+ -- ld: elf error: file
+ -- /tmp/ghc-src/libraries/base/dist-install/build:
+ -- elf_begin: I/O error: region read: Is a directory
+ rpathlink = if (platformOS platform) == OSSolaris2
+ then []
+ else ["-Xlinker", "-rpath-link", "-Xlinker", l]
+ in ["-L" ++ l] ++ rpathlink ++ rpath
+ | osMachOTarget (platformOS platform) &&
+ leDynLibLoader opts == SystemDependent &&
+ ways_ `hasWay` WayDyn &&
+ leUseXLinkerRPath opts
+ = let libpath = if leRelativeDynlibPaths opts
+ then "@loader_path" </>
+ (l `makeRelativeTo` full_output_fn)
+ else l
+ in ["-L" ++ l] ++ ["-Xlinker", "-rpath", "-Xlinker", libpath]
+ | otherwise = ["-L" ++ l]
+
+ pkg_lib_path_opts <-
+ if leSingleLibFolder opts
+ then do
+ libs <- getLibs namever ways_ unit_env dep_units
+ tmpDir <- newTempSubDir logger tmpfs (leTempDir opts)
+ sequence_ [ copyFile lib (tmpDir </> basename)
+ | (lib, basename) <- libs]
+ return [ "-L" ++ tmpDir ]
+ else pure pkg_lib_path_opts
+
+ let
+ dead_strip
+ | leWholeArchiveHsLibs opts = []
+ | otherwise = if osSubsectionsViaSymbols (platformOS platform)
+ then ["-Wl,-dead_strip"]
+ else []
+ let lib_paths = leLibraryPaths opts
+ let lib_path_opts = map ("-L"++) lib_paths
+
+ extraLinkObj <- maybeToList <$> mkExtraObjToLinkIntoBinary logger tmpfs opts unit_state
+ noteLinkObjs <- mkNoteObjsToLinkIntoBinary logger tmpfs opts unit_env dep_units
+
+ let
+ (pre_hs_libs, post_hs_libs)
+ | leWholeArchiveHsLibs opts
+ = if platformOS platform == OSDarwin
+ then (["-Wl,-all_load"], [])
+ -- OS X does not have a flag to turn off -all_load
+ else (["-Wl,--whole-archive"], ["-Wl,--no-whole-archive"])
+ | otherwise
+ = ([],[])
+
+ pkg_link_opts <- do
+ unit_link_opts <- getUnitLinkOpts namever ways_ unit_env dep_units
+ return $ otherFlags unit_link_opts ++ dead_strip
+ ++ pre_hs_libs ++ hsLibs unit_link_opts ++ post_hs_libs
+ ++ extraLibs unit_link_opts
+ -- -Wl,-u,<sym> contained in other_flags
+ -- needs to be put before -l<package>,
+ -- otherwise Solaris linker fails linking
+ -- a binary with unresolved symbols in RTS
+ -- which are defined in base package
+ -- the reason for this is a note in ld(1) about
+ -- '-u' option: "The placement of this option
+ -- on the command line is significant.
+ -- This option must be placed before the library
+ -- that defines the symbol."
+
+ -- frameworks
+ pkg_framework_opts <- getUnitFrameworkOpts unit_env dep_units
+ let framework_opts = getFrameworkOpts (leFrameworkOpts opts) platform
+
+ -- probably _stub.o files
+ let extra_ld_inputs = leInputs opts
+
+ rc_objs <- case platformOS platform of
+ OSMinGW32 | leGenManifest opts -> maybeCreateManifest logger tmpfs (leManifestOpts opts) output_fn
+ _ -> return []
+
+ let linker_config = leLinkerConfig opts
+ let args = ( map GHC.SysTools.Option verbFlags
+ ++ [ GHC.SysTools.Option "-o"
+ , GHC.SysTools.FileOption "" output_fn
+ ]
+ ++ libmLinkOpts platform
+ ++ map GHC.SysTools.Option (
+ []
+
+ -- See Note [No PIE when linking]
+ ++ lePieOpts opts
+
+ -- Permit the linker to auto link _symbol to _imp_symbol.
+ -- This lets us link against DLLs without needing an "import library".
+ ++ (if platformOS platform == OSMinGW32
+ then ["-Wl,--enable-auto-import"]
+ else [])
+
+ -- '-no_compact_unwind'
+ -- C++/Objective-C exceptions cannot use optimised
+ -- stack unwinding code. The optimised form is the
+ -- default in Xcode 4 on at least x86_64, and
+ -- without this flag we're also seeing warnings
+ -- like
+ -- ld: warning: could not create compact unwind for .LFB3: non-standard register 5 being saved in prolog
+ -- on x86.
+ ++ (if not (leCompactUnwind opts) &&
+ linkerSupportsCompactUnwind (leLinkerConfig opts) &&
+ (platformOS platform == OSDarwin) &&
+ case platformArch platform of
+ ArchX86_64 -> True
+ ArchAArch64 -> True
+ _ -> False
+ then ["-Wl,-no_compact_unwind"]
+ else [])
+
+ -- We should rather be asking does it support --gc-sections?
+ ++ (if linkerIsGnuLd (leLinkerConfig opts) &&
+ not (leWholeArchiveHsLibs opts)
+ then ["-Wl,--gc-sections"]
+ else [])
+
+ ++ o_files
+ ++ lib_path_opts)
+ ++ extra_ld_inputs
+ ++ map GHC.SysTools.Option (
+ rc_objs
+ ++ framework_opts
+ ++ pkg_lib_path_opts
+ ++ extraLinkObj
+ ++ noteLinkObjs
+ -- See Note [RTS/ghc-internal interface]
+ -- (-u<sym> must come before -lghc-internal...!)
+ ++ (if ghcInternalUnitId `elem` map unitId pkgs
+ then [concat [ "-Wl,-u,"
+ , ['_' | platformLeadingUnderscore platform]
+ , "init_ghc_hs_iface" ]]
+ else [])
+ ++ pkg_link_opts
+ ++ pkg_framework_opts
+ ++ (if platformOS platform == OSDarwin
+ -- dead_strip_dylibs, will remove unused dylibs, and thus save
+ -- space in the load commands. The -headerpad is necessary so
+ -- that we can inject more @rpath's later for the left over
+ -- libraries during runInjectRpaths phase.
+ --
+ -- See Note [Dynamic linking on macOS].
+ then [ "-Wl,-dead_strip_dylibs", "-Wl,-headerpad,8000" ]
+ else [])
+ ))
+
+ runLink logger tmpfs linker_config args
+
+ -- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
+ when (platformOS platform == OSDarwin && leRPath opts) $
+ GHC.Linker.MacOS.runInjectRPaths logger (leOtoolConfig opts) (leInstallNameConfig opts) pkg_lib_paths output_fn
+
+mkExtraObj :: Logger -> TmpFs -> TempDir -> CcConfig -> UnitState -> Suffix -> String -> IO FilePath
+mkExtraObj logger tmpfs tmpdir cc_config unit_state extn xs
+ = do
+ -- Pass a different set of options to the C compiler depending one whether
+ -- we're compiling C or assembler. When compiling C, we pass the usual
+ -- set of include directories and PIC flags.
+ let cOpts = map Option (ccPicOpts cc_config)
+ ++ map (FileOption "-I" . ST.unpack)
+ (unitIncludeDirs $ unsafeLookupUnit unit_state rtsUnit)
+ cFile <- newTempName logger tmpfs tmpdir TFL_CurrentModule extn
+ oFile <- newTempName logger tmpfs tmpdir TFL_GhcSession "o"
+ writeFile cFile xs
+ runCc Nothing logger tmpfs tmpdir cc_config
+ ([Option "-c",
+ FileOption "" cFile,
+ Option "-o",
+ FileOption "" oFile]
+ ++ if extn /= "s"
+ then cOpts
+ else [])
+ return oFile
+
+-- | Create object containing main() entry point
+--
+-- When linking a binary, we need to create a C main() function that
+-- starts everything off. This used to be compiled statically as part
+-- of the RTS, but that made it hard to change the -rtsopts setting,
+-- so now we generate and compile a main() stub as part of every
+-- binary and pass the -rtsopts setting directly to the RTS (#5373)
+mkExtraObjToLinkIntoBinary :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitState -> IO (Maybe FilePath)
+mkExtraObjToLinkIntoBinary logger tmpfs opts unit_state = do
+ when (leNoHsMain opts && leHaveRtsOptsFlags opts) $
+ logInfo logger $ withPprStyle defaultUserStyle
+ (text "Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main." $$
+ text " Call hs_init_ghc() from your main() function to set these options.")
+
+ if leNoHsMain opts
+ -- Don't try to build the extra object if it is not needed. Compiling the
+ -- extra object assumes the presence of the RTS in the unit database
+ -- (because the extra object imports Rts.h) but GHC's build system may try
+ -- to build some helper programs before building and registering the RTS!
+ -- See #18938 for an example where hp2ps failed to build because of a failed
+ -- (unsafe) lookup for the RTS in the unit db.
+ then pure Nothing
+ else mk_extra_obj exeMain
+
+ where
+ tmpdir = leTempDir opts
+ cc_config = leCcConfig opts
+ mk_extra_obj = fmap Just . mkExtraObj logger tmpfs tmpdir cc_config unit_state "c" . renderWithContext defaultSDocContext
+
+ exeMain = vcat [
+ text "#include <Rts.h>",
+ text "extern StgClosure " <> text (leMainSymbol opts) <> text "_closure;",
+ text "int main(int argc, char *argv[])",
+ char '{',
+ text " RtsConfig __conf = defaultRtsConfig;",
+ text " __conf.rts_opts_enabled = "
+ <> text (show (leRtsOptsEnabled opts)) <> semi,
+ text " __conf.rts_opts_suggestions = "
+ <> (if leRtsOptsSuggestions opts
+ then text "true"
+ else text "false") <> semi,
+ text "__conf.keep_cafs = "
+ <> (if leKeepCafs opts
+ then text "true"
+ else text "false") <> semi,
+ case leRtsOpts opts of
+ Nothing -> Outputable.empty
+ Just rts_opts -> text " __conf.rts_opts= " <>
+ text (show rts_opts) <> semi,
+ text " __conf.rts_hs_main = true;",
+ text " return hs_main(argc,argv,&" <> text (leMainSymbol opts) <> text "_closure,__conf);",
+ char '}',
+ char '\n' -- final newline, to keep gcc happy
+ ]
+
+-- Write out the link info section into a new assembly file. Previously
+-- this was included as inline assembly in the main.c file but this
+-- is pretty fragile. gas gets upset trying to calculate relative offsets
+-- that span the .note section (notably .text) when debug info is present
+mkNoteObjsToLinkIntoBinary :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> [UnitId] -> IO [FilePath]
+mkNoteObjsToLinkIntoBinary logger tmpfs opts unit_env dep_packages = do
+ link_info <- initLinkInfo opts unit_env dep_packages
+
+ if (platformSupportsSavingLinkOpts (platformOS platform ))
+ then fmap (:[]) $ mkExtraObj logger tmpfs tmpdir cc_config unit_state "s" (renderWithContext defaultSDocContext (link_opts link_info))
+ else return []
+
+ where
+ unit_state = ue_homeUnitState unit_env
+ platform = ue_platform unit_env
+ tmpdir = leTempDir opts
+ cc_config = leCcConfig opts
+ link_opts info = hcat
+ [ -- "link info" section (see Note [LinkInfo section])
+ makeElfNote platform ghcLinkInfoSectionName ghcLinkInfoNoteName 0 (show info)
+
+ -- ALL generated assembly must have this section to disable
+ -- executable stacks. See also
+ -- "GHC.CmmToAsm" for another instance
+ -- where we need to do this.
+ , if platformHasGnuNonexecStack platform
+ then text ".section .note.GNU-stack,\"\","
+ <> sectionType platform "progbits" <> char '\n'
+ else Outputable.empty
+ ]
+
+data LinkInfo = LinkInfo
+ { liPkgLinkOpts :: UnitLinkOpts
+ , liPkgFrameworks :: [String]
+ , liRtsOpts :: Maybe String
+ , liRtsOptsEnabled :: !RtsOptsEnabled
+ , liNoHsMain :: !Bool
+ , liLdInputs :: [String]
+ , liLdOpts :: [String]
+ }
+ deriving (Show)
+
+
+-- | Return the "link info"
+--
+-- See Note [LinkInfo section]
+initLinkInfo :: ExecutableLinkOpts -> UnitEnv -> [UnitId] -> IO LinkInfo
+initLinkInfo opts unit_env dep_packages = do
+ package_link_opts <- getUnitLinkOpts (leNameVersion opts) (leWays opts) unit_env dep_packages
+ pkg_frameworks <- if not (platformUsesFrameworks (ue_platform unit_env))
+ then return []
+ else do
+ ps <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_packages)
+ return (collectFrameworks ps)
+ pure $ LinkInfo
+ { liPkgLinkOpts = package_link_opts
+ , liPkgFrameworks = pkg_frameworks
+ , liRtsOpts = leRtsOpts opts
+ , liRtsOptsEnabled = leRtsOptsEnabled opts
+ , liNoHsMain = leNoHsMain opts
+ , liLdInputs = map showOpt (leInputs opts)
+ , liLdOpts = map showOpt (linkerOptionsPost (leLinkerConfig opts))
+ }
+
+platformSupportsSavingLinkOpts :: OS -> Bool
+platformSupportsSavingLinkOpts os
+ | os == OSSolaris2 = False -- see #5382
+ | otherwise = osElfTarget os
+
+-- See Note [LinkInfo section]
+ghcLinkInfoSectionName :: String
+ghcLinkInfoSectionName = ".debug-ghc-link-info"
+ -- if we use the ".debug" prefix, then strip will strip it by default
+
+-- Identifier for the note (see Note [LinkInfo section])
+ghcLinkInfoNoteName :: String
+ghcLinkInfoNoteName = "GHC link info"
+
+-- Returns 'False' if it was, and we can avoid linking, because the
+-- previous binary was linked with "the same options".
+checkLinkInfo :: Logger -> ExecutableLinkOpts -> UnitEnv -> [UnitId] -> FilePath -> IO Bool
+checkLinkInfo logger opts unit_env pkg_deps exe_file
+ | not (platformSupportsSavingLinkOpts (platformOS (ue_platform unit_env)))
+ -- ToDo: Windows and OS X do not use the ELF binary format, so
+ -- readelf does not work there. We need to find another way to do
+ -- this.
+ = return False -- conservatively we should return True, but not
+ -- linking in this case was the behaviour for a long
+ -- time so we leave it as-is.
+ | otherwise
+ = do
+ link_info <- initLinkInfo opts unit_env pkg_deps
+ debugTraceMsg logger 3 $ text ("Link info: " ++ show link_info)
+ m_exe_link_info <- readElfNoteAsString logger exe_file
+ ghcLinkInfoSectionName ghcLinkInfoNoteName
+ let sameLinkInfo = (Just (show link_info) == m_exe_link_info)
+ debugTraceMsg logger 3 $ case m_exe_link_info of
+ Nothing -> text "Exe link info: Not found"
+ Just s
+ | sameLinkInfo -> text ("Exe link info is the same")
+ | otherwise -> text ("Exe link info is different: " ++ s)
+ return (not sameLinkInfo)
+
+{- Note [LinkInfo section]
+ ~~~~~~~~~~~~~~~~~~~~~~~
+
+The "link info" is a string representing the parameters of the link. We save
+this information in the binary, and the next time we link, if nothing else has
+changed, we use the link info stored in the existing binary to decide whether
+to re-link or not.
+
+The "link info" string is stored in a ELF section called ".debug-ghc-link-info"
+(see ghcLinkInfoSectionName) with the SHT_NOTE type. For some time, it used to
+not follow the specified record-based format (see #11022).
+
+-}
+
+{-
+Note [-Xlinker -rpath vs -Wl,-rpath]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+-Wl takes a comma-separated list of options which in the case of
+-Wl,-rpath -Wl,some,path,with,commas parses the path with commas
+as separate options.
+Buck, the build system, produces paths with commas in them.
+
+-Xlinker doesn't have this disadvantage and as far as I can tell
+it is supported by both gcc and clang. Anecdotally nvcc supports
+-Xlinker, but not -Wl.
+-}
+
=====================================
compiler/GHC/Linker/ExtraObj.hs deleted
=====================================
@@ -1,257 +0,0 @@
------------------------------------------------------------------------------
---
--- GHC Extra object linking code
---
--- (c) The GHC Team 2017
---
------------------------------------------------------------------------------
-
-module GHC.Linker.ExtraObj
- ( mkExtraObj
- , mkExtraObjToLinkIntoBinary
- , mkNoteObjsToLinkIntoBinary
- , checkLinkInfo
- , getLinkInfo
- , ghcLinkInfoSectionName
- , ghcLinkInfoNoteName
- , platformSupportsSavingLinkOpts
- , haveRtsOptsFlags
- )
-where
-
-import GHC.Prelude
-import GHC.Platform
-
-import GHC.Unit
-import GHC.Unit.Env
-
-import GHC.Utils.Asm
-import GHC.Utils.Error
-import GHC.Utils.Misc
-import GHC.Utils.Outputable as Outputable
-import GHC.Utils.Logger
-import GHC.Utils.TmpFs
-
-import GHC.Driver.Session
-import GHC.Driver.Ppr
-
-import qualified GHC.Data.ShortText as ST
-
-import GHC.SysTools.Elf
-import GHC.SysTools.Tasks
-import GHC.Linker.Unit
-
-import Control.Monad
-import Data.Maybe
-
-mkExtraObj :: Logger -> TmpFs -> DynFlags -> UnitState -> Suffix -> String -> IO FilePath
-mkExtraObj logger tmpfs dflags unit_state extn xs
- = do cFile <- newTempName logger tmpfs (tmpDir dflags) TFL_CurrentModule extn
- oFile <- newTempName logger tmpfs (tmpDir dflags) TFL_GhcSession "o"
- writeFile cFile xs
- runCc Nothing logger tmpfs dflags
- ([Option "-c",
- FileOption "" cFile,
- Option "-o",
- FileOption "" oFile]
- ++ if extn /= "s"
- then cOpts
- else [])
- return oFile
- where
- -- Pass a different set of options to the C compiler depending one whether
- -- we're compiling C or assembler. When compiling C, we pass the usual
- -- set of include directories and PIC flags.
- cOpts = map Option (picCCOpts dflags)
- ++ map (FileOption "-I" . ST.unpack)
- (unitIncludeDirs $ unsafeLookupUnit unit_state rtsUnit)
-
--- When linking a binary, we need to create a C main() function that
--- starts everything off. This used to be compiled statically as part
--- of the RTS, but that made it hard to change the -rtsopts setting,
--- so now we generate and compile a main() stub as part of every
--- binary and pass the -rtsopts setting directly to the RTS (#5373)
---
--- On Windows, when making a shared library we also may need a DllMain.
---
-mkExtraObjToLinkIntoBinary :: Logger -> TmpFs -> DynFlags -> UnitState -> IO (Maybe FilePath)
-mkExtraObjToLinkIntoBinary logger tmpfs dflags unit_state = do
- when (gopt Opt_NoHsMain dflags && haveRtsOptsFlags dflags) $
- logInfo logger $ withPprStyle defaultUserStyle
- (text "Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main." $$
- text " Call hs_init_ghc() from your main() function to set these options.")
-
- case ghcLink dflags of
- -- Don't try to build the extra object if it is not needed. Compiling the
- -- extra object assumes the presence of the RTS in the unit database
- -- (because the extra object imports Rts.h) but GHC's build system may try
- -- to build some helper programs before building and registering the RTS!
- -- See #18938 for an example where hp2ps failed to build because of a failed
- -- (unsafe) lookup for the RTS in the unit db.
- _ | gopt Opt_NoHsMain dflags
- -> return Nothing
-
- LinkDynLib
- | OSMinGW32 <- platformOS (targetPlatform dflags)
- -> mk_extra_obj dllMain
-
- | otherwise
- -> return Nothing
-
- _ -> mk_extra_obj exeMain
-
- where
- mk_extra_obj = fmap Just . mkExtraObj logger tmpfs dflags unit_state "c" . showSDoc dflags
-
- exeMain = vcat [
- text "#include <Rts.h>",
- text "extern StgClosure ZCMain_main_closure;",
- text "int main(int argc, char *argv[])",
- char '{',
- text " RtsConfig __conf = defaultRtsConfig;",
- text " __conf.rts_opts_enabled = "
- <> text (show (rtsOptsEnabled dflags)) <> semi,
- text " __conf.rts_opts_suggestions = "
- <> (if rtsOptsSuggestions dflags
- then text "true"
- else text "false") <> semi,
- text "__conf.keep_cafs = "
- <> (if gopt Opt_KeepCAFs dflags
- then text "true"
- else text "false") <> semi,
- case rtsOpts dflags of
- Nothing -> Outputable.empty
- Just opts -> text " __conf.rts_opts= " <>
- text (show opts) <> semi,
- text " __conf.rts_hs_main = true;",
- text " return hs_main(argc,argv,&ZCMain_main_closure,__conf);",
- char '}',
- char '\n' -- final newline, to keep gcc happy
- ]
-
- dllMain = vcat [
- text "#include <Rts.h>",
- text "#include <windows.h>",
- text "#include <stdbool.h>",
- char '\n',
- text "bool",
- text "WINAPI",
- text "DllMain ( HINSTANCE hInstance STG_UNUSED",
- text " , DWORD reason STG_UNUSED",
- text " , LPVOID reserved STG_UNUSED",
- text " )",
- text "{",
- text " return true;",
- text "}",
- char '\n' -- final newline, to keep gcc happy
- ]
-
--- Write out the link info section into a new assembly file. Previously
--- this was included as inline assembly in the main.c file but this
--- is pretty fragile. gas gets upset trying to calculate relative offsets
--- that span the .note section (notably .text) when debug info is present
-mkNoteObjsToLinkIntoBinary :: Logger -> TmpFs -> DynFlags -> UnitEnv -> [UnitId] -> IO [FilePath]
-mkNoteObjsToLinkIntoBinary logger tmpfs dflags unit_env dep_packages = do
- link_info <- getLinkInfo dflags unit_env dep_packages
-
- if (platformSupportsSavingLinkOpts (platformOS platform ))
- then fmap (:[]) $ mkExtraObj logger tmpfs dflags unit_state "s" (showSDoc dflags (link_opts link_info))
- else return []
-
- where
- unit_state = ue_homeUnitState unit_env
- platform = ue_platform unit_env
- link_opts info = hcat
- [ -- "link info" section (see Note [LinkInfo section])
- makeElfNote platform ghcLinkInfoSectionName ghcLinkInfoNoteName 0 info
-
- -- ALL generated assembly must have this section to disable
- -- executable stacks. See also
- -- "GHC.CmmToAsm" for another instance
- -- where we need to do this.
- , if platformHasGnuNonexecStack platform
- then text ".section .note.GNU-stack,\"\","
- <> sectionType platform "progbits" <> char '\n'
- else Outputable.empty
- ]
-
--- | Return the "link info" string
---
--- See Note [LinkInfo section]
-getLinkInfo :: DynFlags -> UnitEnv -> [UnitId] -> IO String
-getLinkInfo dflags unit_env dep_packages = do
- package_link_opts <- getUnitLinkOpts (ghcNameVersion dflags) (ways dflags) unit_env dep_packages
- pkg_frameworks <- if not (platformUsesFrameworks (ue_platform unit_env))
- then return []
- else do
- ps <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_packages)
- return (collectFrameworks ps)
- let link_info =
- ( package_link_opts
- , pkg_frameworks
- , rtsOpts dflags
- , rtsOptsEnabled dflags
- , gopt Opt_NoHsMain dflags
- , map showOpt (ldInputs dflags)
- , getOpts dflags opt_l
- )
- return (show link_info)
-
-platformSupportsSavingLinkOpts :: OS -> Bool
-platformSupportsSavingLinkOpts os
- | os == OSSolaris2 = False -- see #5382
- | otherwise = osElfTarget os
-
--- See Note [LinkInfo section]
-ghcLinkInfoSectionName :: String
-ghcLinkInfoSectionName = ".debug-ghc-link-info"
- -- if we use the ".debug" prefix, then strip will strip it by default
-
--- Identifier for the note (see Note [LinkInfo section])
-ghcLinkInfoNoteName :: String
-ghcLinkInfoNoteName = "GHC link info"
-
--- Returns 'False' if it was, and we can avoid linking, because the
--- previous binary was linked with "the same options".
-checkLinkInfo :: Logger -> DynFlags -> UnitEnv -> [UnitId] -> FilePath -> IO Bool
-checkLinkInfo logger dflags unit_env pkg_deps exe_file
- | not (platformSupportsSavingLinkOpts (platformOS (ue_platform unit_env)))
- -- ToDo: Windows and OS X do not use the ELF binary format, so
- -- readelf does not work there. We need to find another way to do
- -- this.
- = return False -- conservatively we should return True, but not
- -- linking in this case was the behaviour for a long
- -- time so we leave it as-is.
- | otherwise
- = do
- link_info <- getLinkInfo dflags unit_env pkg_deps
- debugTraceMsg logger 3 $ text ("Link info: " ++ link_info)
- m_exe_link_info <- readElfNoteAsString logger exe_file
- ghcLinkInfoSectionName ghcLinkInfoNoteName
- let sameLinkInfo = (Just link_info == m_exe_link_info)
- debugTraceMsg logger 3 $ case m_exe_link_info of
- Nothing -> text "Exe link info: Not found"
- Just s
- | sameLinkInfo -> text ("Exe link info is the same")
- | otherwise -> text ("Exe link info is different: " ++ s)
- return (not sameLinkInfo)
-
-{- Note [LinkInfo section]
- ~~~~~~~~~~~~~~~~~~~~~~~
-
-The "link info" is a string representing the parameters of the link. We save
-this information in the binary, and the next time we link, if nothing else has
-changed, we use the link info stored in the existing binary to decide whether
-to re-link or not.
-
-The "link info" string is stored in a ELF section called ".debug-ghc-link-info"
-(see ghcLinkInfoSectionName) with the SHT_NOTE type. For some time, it used to
-not follow the specified record-based format (see #11022).
-
--}
-
-haveRtsOptsFlags :: DynFlags -> Bool
-haveRtsOptsFlags dflags =
- isJust (rtsOpts dflags) || case rtsOptsEnabled dflags of
- RtsOptsSafeOnly -> False
- _ -> True
=====================================
compiler/GHC/Linker/Loader.hs
=====================================
@@ -406,6 +406,7 @@ loadCmdLineLibs'' interp hsc_env pls =
, libraryPaths = lib_paths_base})
= hsc_dflags hsc_env
let logger = hsc_logger hsc_env
+ let ld_config = configureLd dflags
-- (c) Link libraries from the command-line
let minus_ls_1 = [ lib | Option ('-':'l':lib) <- cmdline_ld_inputs ]
@@ -421,7 +422,7 @@ loadCmdLineLibs'' interp hsc_env pls =
OSMinGW32 -> "pthread" : minus_ls_1
_ -> minus_ls_1
-- See Note [Fork/Exec Windows]
- gcc_paths <- getGCCPaths logger dflags os
+ gcc_paths <- getGCCPaths logger platform ld_config
lib_paths_env <- addEnvPaths "LIBRARY_PATH" lib_paths_base
@@ -1254,6 +1255,7 @@ loadPackage interp hsc_env pkgs
= do
let dflags = hsc_dflags hsc_env
let logger = hsc_logger hsc_env
+ ld_config = configureLd dflags
platform = targetPlatform dflags
is_dyn = interpreterDynamic interp
dirs | is_dyn = [map ST.unpack $ Packages.unitLibraryDynDirs pkg | pkg <- pkgs]
@@ -1281,7 +1283,7 @@ loadPackage interp hsc_env pkgs
extra_libs = zipWith (++) extdeplibs linkerlibs
-- See Note [Fork/Exec Windows]
- gcc_paths <- getGCCPaths logger dflags (platformOS platform)
+ gcc_paths <- getGCCPaths logger platform ld_config
dirs_env <- traverse (addEnvPaths "LIBRARY_PATH") dirs
hs_classifieds
@@ -1507,6 +1509,7 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
dflags = hsc_dflags hsc_env
logger = hsc_logger hsc_env
diag_opts = initDiagOpts dflags
+ ld_config = configureLd dflags
dirs = lib_dirs ++ gcc_dirs
gcc = False
user = True
@@ -1570,7 +1573,7 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
findSysDll = fmap (fmap $ DLL . dropExtension . takeFileName) $
findSystemLibrary interp so_name
#endif
- tryGcc = let search = searchForLibUsingGcc logger dflags
+ tryGcc = let search = searchForLibUsingGcc logger ld_config
#if defined(CAN_LOAD_DLL)
dllpath = liftM (fmap DLLPath)
short = dllpath $ search so_name lib_dirs
@@ -1624,11 +1627,11 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
#endif
os = platformOS platform
-searchForLibUsingGcc :: Logger -> DynFlags -> String -> [FilePath] -> IO (Maybe FilePath)
-searchForLibUsingGcc logger dflags so dirs = do
+searchForLibUsingGcc :: Logger -> LdConfig -> String -> [FilePath] -> IO (Maybe FilePath)
+searchForLibUsingGcc logger ld_config so dirs = do
-- GCC does not seem to extend the library search path (using -L) when using
-- --print-file-name. So instead pass it a new base location.
- str <- askLd logger dflags (map (FileOption "-B") dirs
+ str <- askLd logger ld_config (map (FileOption "-B") dirs
++ [Option "--print-file-name", Option so])
let file = case lines str of
[] -> ""
@@ -1640,10 +1643,10 @@ searchForLibUsingGcc logger dflags so dirs = do
-- | Retrieve the list of search directory GCC and the System use to find
-- libraries and components. See Note [Fork/Exec Windows].
-getGCCPaths :: Logger -> DynFlags -> OS -> IO [FilePath]
-getGCCPaths logger dflags os
- | os == OSMinGW32 || platformArch (targetPlatform dflags) == ArchWasm32 =
- do gcc_dirs <- getGccSearchDirectory logger dflags "libraries"
+getGCCPaths :: Logger -> Platform -> LdConfig -> IO [FilePath]
+getGCCPaths logger platform ld_config
+ | platformOS platform == OSMinGW32 || platformArch platform == ArchWasm32 =
+ do gcc_dirs <- getGccSearchDirectory logger ld_config "libraries"
sys_dirs <- getSystemDirectories
return $ nub $ gcc_dirs ++ sys_dirs
| otherwise = return []
@@ -1663,8 +1666,8 @@ gccSearchDirCache = unsafePerformIO $ newIORef []
-- which hopefully is written in an optimized manner to take advantage of
-- caching. At the very least we remove the overhead of the fork/exec and waits
-- which dominate a large percentage of startup time on Windows.
-getGccSearchDirectory :: Logger -> DynFlags -> String -> IO [FilePath]
-getGccSearchDirectory logger dflags key = do
+getGccSearchDirectory :: Logger -> LdConfig -> String -> IO [FilePath]
+getGccSearchDirectory logger ld_config key = do
#if defined(wasm32_HOST_ARCH)
pure []
#else
@@ -1672,7 +1675,7 @@ getGccSearchDirectory logger dflags key = do
case lookup key cache of
Just x -> return x
Nothing -> do
- str <- askLd logger dflags [Option "--print-search-dirs"]
+ str <- askLd logger ld_config [Option "--print-search-dirs"]
let line = dropWhile isSpace str
name = key ++ ": ="
if null line
=====================================
compiler/GHC/Linker/MacOS.hs
=====================================
@@ -17,7 +17,6 @@ import GHC.Unit.Types
import GHC.Unit.State
import GHC.Unit.Env
-import GHC.Settings
import GHC.SysTools.Tasks
import GHC.Runtime.Interpreter
@@ -49,13 +48,13 @@ import Text.ParserCombinators.ReadP as Parser
-- dynamic library through @-add_rpath@.
--
-- See Note [Dynamic linking on macOS]
-runInjectRPaths :: Logger -> ToolSettings -> [FilePath] -> FilePath -> IO ()
-runInjectRPaths logger toolSettings lib_paths dylib = do
- info <- lines <$> askOtool logger toolSettings Nothing [Option "-L", Option dylib]
+runInjectRPaths :: Logger -> OtoolConfig -> InstallNameConfig -> [FilePath] -> FilePath -> IO ()
+runInjectRPaths logger otool_opts install_name_opts lib_paths dylib = do
+ info <- lines <$> askOtool logger otool_opts Nothing [Option "-L", Option dylib]
-- filter the output for only the libraries. And then drop the @rpath prefix.
let libs = fmap (drop 7) $ filter (isPrefixOf "@rpath") $ fmap (head.words) $ info
-- find any pre-existing LC_PATH items
- info <- lines <$> askOtool logger toolSettings Nothing [Option "-l", Option dylib]
+ info <- lines <$> askOtool logger otool_opts Nothing [Option "-l", Option dylib]
let paths = mapMaybe get_rpath info
lib_paths' = [ p | p <- lib_paths, not (p `elem` paths) ]
-- only find those rpaths, that aren't already in the library.
@@ -63,7 +62,7 @@ runInjectRPaths logger toolSettings lib_paths dylib = do
-- inject the rpaths
case rpaths of
[] -> return ()
- _ -> runInstallNameTool logger toolSettings $ map Option $ "-add_rpath":(intersperse "-add_rpath" rpaths) ++ [dylib]
+ _ -> runInstallNameTool logger install_name_opts $ map Option $ "-add_rpath":(intersperse "-add_rpath" rpaths) ++ [dylib]
get_rpath :: String -> Maybe FilePath
get_rpath l = case readP_to_S rpath_parser l of
=====================================
compiler/GHC/Linker/Static.hs
=====================================
@@ -1,12 +1,10 @@
module GHC.Linker.Static
- ( linkBinary
- , linkStaticLib
+ ( linkStaticLib
)
where
import GHC.Prelude
import GHC.Platform
-import GHC.Platform.Ways
import GHC.Settings
import GHC.SysTools
@@ -19,24 +17,15 @@ import GHC.Unit.State
import GHC.Utils.Logger
import GHC.Utils.Monad
-import GHC.Utils.Misc
-import GHC.Utils.TmpFs
-import GHC.Linker.MacOS
import GHC.Linker.Unit
-import GHC.Linker.Dynamic
-import GHC.Linker.ExtraObj
-import GHC.Linker.External
-import GHC.Linker.Windows
import GHC.Linker.Static.Utils
-import GHC.Driver.Config.Linker
import GHC.Driver.Session
import System.FilePath
import System.Directory
import Control.Monad
-import Data.Maybe
-----------------------------------------------------------------------------
-- Static linking, of .o files
@@ -51,225 +40,6 @@ import Data.Maybe
-- read any interface files), so the user must explicitly specify all
-- the packages.
-{-
-Note [-Xlinker -rpath vs -Wl,-rpath]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
--Wl takes a comma-separated list of options which in the case of
--Wl,-rpath -Wl,some,path,with,commas parses the path with commas
-as separate options.
-Buck, the build system, produces paths with commas in them.
-
--Xlinker doesn't have this disadvantage and as far as I can tell
-it is supported by both gcc and clang. Anecdotally nvcc supports
--Xlinker, but not -Wl.
--}
-
-linkBinary :: Logger -> TmpFs -> DynFlags -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
-linkBinary = linkBinary' False
-
-linkBinary' :: Bool -> Logger -> TmpFs -> DynFlags -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
-linkBinary' staticLink logger tmpfs dflags unit_env o_files dep_units = do
- let platform = ue_platform unit_env
- unit_state = ue_homeUnitState unit_env
- toolSettings' = toolSettings dflags
- verbFlags = getVerbFlags dflags
- arch_os = platformArchOS platform
- output_fn = exeFileName arch_os staticLink (outputFile_ dflags)
- namever = ghcNameVersion dflags
- -- For the wasm target, when ghc is invoked with -dynamic,
- -- when linking the final .wasm binary we must still ensure
- -- the static archives are selected. Otherwise wasm-ld would
- -- fail to find and link the .so library dependencies. wasm-ld
- -- can link PIC objects into static .wasm binaries fine, so we
- -- only adjust the ways in the final linking step, and only
- -- when linking .wasm binary (which is supposed to be fully
- -- static), not when linking .so shared libraries.
- ways_
- | ArchWasm32 <- platformArch platform = removeWay WayDyn $ targetWays_ dflags
- | otherwise = ways dflags
-
- full_output_fn <- if isAbsolute output_fn
- then return output_fn
- else do d <- getCurrentDirectory
- return $ normalise (d </> output_fn)
-
- -- get the full list of packages to link with, by combining the
- -- explicit packages with the auto packages and all of their
- -- dependencies, and eliminating duplicates.
- pkgs <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_units)
- let pkg_lib_paths = collectLibraryDirs ways_ pkgs
- let pkg_lib_path_opts = concatMap get_pkg_lib_path_opts pkg_lib_paths
- get_pkg_lib_path_opts l
- | osElfTarget (platformOS platform) &&
- dynLibLoader dflags == SystemDependent &&
- ways_ `hasWay` WayDyn
- = let libpath = if gopt Opt_RelativeDynlibPaths dflags
- then "$ORIGIN" </>
- (l `makeRelativeTo` full_output_fn)
- else l
- -- See Note [-Xlinker -rpath vs -Wl,-rpath]
- rpath = if useXLinkerRPath dflags (platformOS platform)
- then ["-Xlinker", "-rpath", "-Xlinker", libpath]
- else []
- -- Solaris 11's linker does not support -rpath-link option. It silently
- -- ignores it and then complains about next option which is -l<some
- -- dir> as being a directory and not expected object file, E.g
- -- ld: elf error: file
- -- /tmp/ghc-src/libraries/base/dist-install/build:
- -- elf_begin: I/O error: region read: Is a directory
- rpathlink = if (platformOS platform) == OSSolaris2
- then []
- else ["-Xlinker", "-rpath-link", "-Xlinker", l]
- in ["-L" ++ l] ++ rpathlink ++ rpath
- | osMachOTarget (platformOS platform) &&
- dynLibLoader dflags == SystemDependent &&
- ways_ `hasWay` WayDyn &&
- useXLinkerRPath dflags (platformOS platform)
- = let libpath = if gopt Opt_RelativeDynlibPaths dflags
- then "@loader_path" </>
- (l `makeRelativeTo` full_output_fn)
- else l
- in ["-L" ++ l] ++ ["-Xlinker", "-rpath", "-Xlinker", libpath]
- | otherwise = ["-L" ++ l]
-
- pkg_lib_path_opts <-
- if gopt Opt_SingleLibFolder dflags
- then do
- libs <- getLibs namever ways_ unit_env dep_units
- tmpDir <- newTempSubDir logger tmpfs (tmpDir dflags)
- sequence_ [ copyFile lib (tmpDir </> basename)
- | (lib, basename) <- libs]
- return [ "-L" ++ tmpDir ]
- else pure pkg_lib_path_opts
-
- let
- dead_strip
- | gopt Opt_WholeArchiveHsLibs dflags = []
- | otherwise = if osSubsectionsViaSymbols (platformOS platform)
- then ["-Wl,-dead_strip"]
- else []
- let lib_paths = libraryPaths dflags
- let lib_path_opts = map ("-L"++) lib_paths
-
- extraLinkObj <- maybeToList <$> mkExtraObjToLinkIntoBinary logger tmpfs dflags unit_state
- noteLinkObjs <- mkNoteObjsToLinkIntoBinary logger tmpfs dflags unit_env dep_units
-
- let
- (pre_hs_libs, post_hs_libs)
- | gopt Opt_WholeArchiveHsLibs dflags
- = if platformOS platform == OSDarwin
- then (["-Wl,-all_load"], [])
- -- OS X does not have a flag to turn off -all_load
- else (["-Wl,--whole-archive"], ["-Wl,--no-whole-archive"])
- | otherwise
- = ([],[])
-
- pkg_link_opts <- do
- unit_link_opts <- getUnitLinkOpts namever ways_ unit_env dep_units
- return $ otherFlags unit_link_opts ++ dead_strip
- ++ pre_hs_libs ++ hsLibs unit_link_opts ++ post_hs_libs
- ++ extraLibs unit_link_opts
- -- -Wl,-u,<sym> contained in other_flags
- -- needs to be put before -l<package>,
- -- otherwise Solaris linker fails linking
- -- a binary with unresolved symbols in RTS
- -- which are defined in base package
- -- the reason for this is a note in ld(1) about
- -- '-u' option: "The placement of this option
- -- on the command line is significant.
- -- This option must be placed before the library
- -- that defines the symbol."
-
- -- frameworks
- pkg_framework_opts <- getUnitFrameworkOpts unit_env dep_units
- let framework_opts = getFrameworkOpts (initFrameworkOpts dflags) platform
-
- -- probably _stub.o files
- let extra_ld_inputs = ldInputs dflags
-
- rc_objs <- case platformOS platform of
- OSMinGW32 | gopt Opt_GenManifest dflags -> maybeCreateManifest logger tmpfs dflags output_fn
- _ -> return []
-
- let linker_config = initLinkerConfig dflags
- let link dflags args = do
- runLink logger tmpfs linker_config args
- -- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
- when (platformOS platform == OSDarwin && gopt Opt_RPath dflags) $
- GHC.Linker.MacOS.runInjectRPaths logger (toolSettings dflags) pkg_lib_paths output_fn
-
- link dflags (
- map GHC.SysTools.Option verbFlags
- ++ [ GHC.SysTools.Option "-o"
- , GHC.SysTools.FileOption "" output_fn
- ]
- ++ libmLinkOpts platform
- ++ map GHC.SysTools.Option (
- []
-
- -- See Note [No PIE when linking]
- ++ pieCCLDOpts dflags
-
- -- Permit the linker to auto link _symbol to _imp_symbol.
- -- This lets us link against DLLs without needing an "import library".
- ++ (if platformOS platform == OSMinGW32
- then ["-Wl,--enable-auto-import"]
- else [])
-
- -- '-no_compact_unwind'
- -- C++/Objective-C exceptions cannot use optimised
- -- stack unwinding code. The optimised form is the
- -- default in Xcode 4 on at least x86_64, and
- -- without this flag we're also seeing warnings
- -- like
- -- ld: warning: could not create compact unwind for .LFB3: non-standard register 5 being saved in prolog
- -- on x86.
- ++ (if not (gopt Opt_CompactUnwind dflags) &&
- toolSettings_ldSupportsCompactUnwind toolSettings' &&
- (platformOS platform == OSDarwin) &&
- case platformArch platform of
- ArchX86_64 -> True
- ArchAArch64 -> True
- _ -> False
- then ["-Wl,-no_compact_unwind"]
- else [])
-
- -- We should rather be asking does it support --gc-sections?
- ++ (if toolSettings_ldIsGnuLd toolSettings' &&
- not (gopt Opt_WholeArchiveHsLibs dflags)
- then ["-Wl,--gc-sections"]
- else [])
-
- ++ o_files
- ++ lib_path_opts)
- ++ extra_ld_inputs
- ++ map GHC.SysTools.Option (
- rc_objs
- ++ framework_opts
- ++ pkg_lib_path_opts
- ++ extraLinkObj
- ++ noteLinkObjs
- -- See Note [RTS/ghc-internal interface]
- -- (-u<sym> must come before -lghc-internal...!)
- ++ (if ghcInternalUnitId `elem` map unitId pkgs
- then [concat [ "-Wl,-u,"
- , ['_' | platformLeadingUnderscore platform]
- , "init_ghc_hs_iface" ]]
- else [])
- ++ pkg_link_opts
- ++ pkg_framework_opts
- ++ (if platformOS platform == OSDarwin
- -- dead_strip_dylibs, will remove unused dylibs, and thus save
- -- space in the load commands. The -headerpad is necessary so
- -- that we can inject more @rpath's later for the left over
- -- libraries during runInjectRpaths phase.
- --
- -- See Note [Dynamic linking on macOS].
- then [ "-Wl,-dead_strip_dylibs", "-Wl,-headerpad,8000" ]
- else [])
- ))
-
-- | Linking a static lib will not really link anything. It will merely produce
-- a static archive of all dependent static libraries. The resulting library
-- will still need to be linked with any remaining link flags.
@@ -309,4 +79,5 @@ linkStaticLib logger dflags unit_env o_files dep_units = do
else writeBSDAr output_fn $ afilter (not . isBSDSymdef) ar
-- run ranlib over the archive. write*Ar does *not* create the symbol index.
- runRanlib logger dflags [GHC.SysTools.FileOption "" output_fn]
+ let ranlib_opts = configureRanlib dflags
+ runRanlib logger ranlib_opts [GHC.SysTools.FileOption "" output_fn]
=====================================
compiler/GHC/Linker/Windows.hs
=====================================
@@ -1,5 +1,7 @@
module GHC.Linker.Windows
- ( maybeCreateManifest
+ ( ManifestOpts (..)
+ , initManifestOpts
+ , maybeCreateManifest
)
where
@@ -12,13 +14,28 @@ import GHC.Utils.Logger
import System.FilePath
import System.Directory
+data ManifestOpts = ManifestOpts
+ { manifestEmbed :: !Bool -- ^ Should the manifest be embedded in the binary with Windres
+ , manifestTempdir :: TempDir
+ , manifestWindresConfig :: WindresConfig
+ , manifestObjectSuf :: String
+ }
+
+initManifestOpts :: DynFlags -> ManifestOpts
+initManifestOpts dflags = ManifestOpts
+ { manifestEmbed = gopt Opt_EmbedManifest dflags
+ , manifestTempdir = tmpDir dflags
+ , manifestWindresConfig = configureWindres dflags
+ , manifestObjectSuf = objectSuf dflags
+ }
+
maybeCreateManifest
:: Logger
-> TmpFs
- -> DynFlags
+ -> ManifestOpts
-> FilePath -- ^ filename of executable
-> IO [FilePath] -- ^ extra objects to embed, maybe
-maybeCreateManifest logger tmpfs dflags exe_filename = do
+maybeCreateManifest logger tmpfs opts exe_filename = do
let manifest_filename = exe_filename <.> "manifest"
manifest =
"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n\
@@ -42,18 +59,18 @@ maybeCreateManifest logger tmpfs dflags exe_filename = do
-- foo.exe.manifest. However, for extra robustness, and so that
-- we can move the binary around, we can embed the manifest in
-- the binary itself using windres:
- if not (gopt Opt_EmbedManifest dflags)
+ if not (manifestEmbed opts)
then return []
else do
- rc_filename <- newTempName logger tmpfs (tmpDir dflags) TFL_CurrentModule "rc"
+ rc_filename <- newTempName logger tmpfs (manifestTempdir opts) TFL_CurrentModule "rc"
rc_obj_filename <-
- newTempName logger tmpfs (tmpDir dflags) TFL_GhcSession (objectSuf dflags)
+ newTempName logger tmpfs (manifestTempdir opts) TFL_GhcSession (manifestObjectSuf opts)
writeFile rc_filename $
"1 24 MOVEABLE PURE \"" ++ manifest_filename ++ "\"\n"
-- magic numbers :-)
- runWindres logger dflags $ map GHC.SysTools.Option $
+ runWindres logger (manifestWindresConfig opts) $ map GHC.SysTools.Option $
["--input="++rc_filename,
"--output="++rc_obj_filename,
"--output-format=coff"]
=====================================
compiler/GHC/Runtime/Interpreter/C.hs
=====================================
@@ -0,0 +1,85 @@
+{-# LANGUAGE MultiWayIf #-}
+
+-- | External interpreter program
+module GHC.Runtime.Interpreter.C
+ ( generateIservC
+ )
+where
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Data.FastString
+import GHC.Utils.Logger
+import GHC.Utils.TmpFs
+import GHC.Unit.Types
+import GHC.Unit.Env
+import GHC.Unit.Info
+import GHC.Unit.State
+import GHC.Utils.Panic.Plain
+import GHC.Linker.Executable
+import GHC.Linker.Config
+import GHC.Utils.CliOption
+
+-- | Generate iserv program for the target
+generateIservC :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> IO FilePath
+generateIservC logger tmpfs opts unit_env = do
+ -- get the unit-id of the ghci package. We need this to load the
+ -- interpreter code.
+ let unit_state = ue_homeUnitState unit_env
+ ghci_unit_id <- case lookupPackageName unit_state (PackageName (fsLit "ghci")) of
+ Nothing -> cmdLineErrorIO "C interpreter: couldn't find \"ghci\" package"
+ Just i -> pure i
+
+ -- generate a temporary name for the iserv program
+ let tmpdir = leTempDir opts
+ exe_file <- newTempName logger tmpfs tmpdir TFL_GhcSession "iserv"
+
+ let platform = ue_platform unit_env
+ let os = platformOS platform
+
+ -- we inherit ExecutableLinkOpts for the target code (i.e. derived from
+ -- DynFlags specified by the user and from settings). We need to adjust these
+ -- options to generate the iserv program we want. Some settings are to be
+ -- shared (e.g. ways, platform, etc.) but some other must be set specifically
+ -- for iserv.
+ let opts' = opts
+ { -- write iserv program in some temporary directory
+ leOutputFile = Just exe_file
+
+ -- we need GHC to generate a main entry point...
+ , leNoHsMain = False
+
+ -- ...however the main symbol must be the iserv server
+ , leMainSymbol = zString (zEncodeFS (unitIdFS ghci_unit_id)) ++ "_GHCiziServer_defaultServer"
+
+ -- we need to reset inputs, otherwise one of them may be defining
+ -- `main` too (with -no-hs-main).
+ , leInputs = []
+
+ -- we never know what symbols GHC will look up in the future, so we
+ -- must retain CAFs for running interpreted code.
+ , leKeepCafs = True
+
+ -- enable all rts options
+ , leRtsOptsEnabled = RtsOptsAll
+
+ -- Add -Wl,--export-dynamic enables GHCi to load dynamic objects that
+ -- refer to the RTS. This is harmless if you don't use it (adds a bit
+ -- of overhead to startup and increases the binary sizes) but if you
+ -- need it there's no alternative.
+ --
+ -- The Solaris linker does not support --export-dynamic option. It also
+ -- does not need it since it exports all dynamic symbols by default
+ , leLinkerConfig = if
+ | osElfTarget os
+ , os /= OSFreeBSD
+ , os /= OSSolaris2
+ -> (leLinkerConfig opts)
+ { linkerOptionsPost = linkerOptionsPost (leLinkerConfig opts) ++ [Option "-Wl,--export-dynamic"]
+ }
+ | otherwise
+ -> leLinkerConfig opts
+ }
+ linkExecutable logger tmpfs opts' unit_env [] [ghci_unit_id]
+
+ pure exe_file
=====================================
compiler/GHC/Runtime/Interpreter/Init.hs
=====================================
@@ -0,0 +1,162 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE MultiWayIf #-}
+
+module GHC.Runtime.Interpreter.Init
+ ( initInterpreter
+ , InterpOpts (..)
+ )
+where
+
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Platform.Ways
+import GHC.Settings
+import GHC.Unit.Finder
+import GHC.Unit.Env
+import GHC.Utils.TmpFs
+import GHC.SysTools.Tasks
+
+import GHC.Linker.Executable
+import qualified GHC.Linker.Loader as Loader
+import GHC.Runtime.Interpreter
+import GHC.Runtime.Interpreter.C
+import GHC.StgToJS.Types (StgToJSConfig)
+
+import GHC.Utils.Monad
+import GHC.Utils.Outputable
+import GHC.Utils.Logger
+import GHC.Utils.Error
+import Control.Concurrent
+import System.Process
+
+data InterpOpts = InterpOpts
+ { interpExternal :: !Bool
+ , interpProg :: String
+ , interpOpts :: [String]
+ , interpWays :: Ways
+ , interpNameVer :: GhcNameVersion
+ , interpLdConfig :: LdConfig
+ , interpCcConfig :: CcConfig
+ , interpJsInterp :: FilePath
+ , interpTmpDir :: TempDir
+ , interpFinderOpts :: FinderOpts
+ , interpJsCodegenCfg :: StgToJSConfig
+ , interpVerbosity :: Int
+ , interpCreateProcess :: Maybe (CreateProcess -> IO ProcessHandle) -- create iserv process hook
+ , interpWasmDyld :: FilePath
+ , interpBrowser :: Bool
+ , interpBrowserHost :: String
+ , interpBrowserPort :: Int
+ , interpBrowserRedirectWasiConsole :: Bool
+ , interpBrowserPuppeteerLaunchOpts :: Maybe String
+ , interpBrowserPlaywrightBrowserType :: Maybe String
+ , interpBrowserPlaywrightLaunchOpts :: Maybe String
+ , interpExecutableLinkOpts :: ExecutableLinkOpts
+ }
+
+-- | Initialize code interpreter
+initInterpreter
+ :: TmpFs
+ -> Logger
+ -> Platform
+ -> FinderCache
+ -> UnitEnv
+ -> InterpOpts
+ -> IO (Maybe Interp)
+initInterpreter tmpfs logger platform finder_cache unit_env opts = do
+
+ lookup_cache <- liftIO $ mkInterpSymbolCache
+
+ -- see Note [Target code interpreter]
+ if
+#if !defined(wasm32_HOST_ARCH)
+ -- Wasm dynamic linker
+ | ArchWasm32 <- platformArch platform
+ -> do
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ libdir <- liftIO $ last <$> Loader.getGccSearchDirectory logger (interpLdConfig opts) "libraries"
+ let profiled = interpWays opts `hasWay` WayProf
+ way_tag = if profiled then "_p" else ""
+ let cfg =
+ WasmInterpConfig
+ { wasmInterpDyLD = interpWasmDyld opts
+ , wasmInterpLibDir = libdir
+ , wasmInterpOpts = interpOpts opts
+ , wasmInterpBrowser = interpBrowser opts
+ , wasmInterpBrowserHost = interpBrowserHost opts
+ , wasmInterpBrowserPort = interpBrowserPort opts
+ , wasmInterpBrowserRedirectWasiConsole = interpBrowserRedirectWasiConsole opts
+ , wasmInterpBrowserPuppeteerLaunchOpts = interpBrowserPuppeteerLaunchOpts opts
+ , wasmInterpBrowserPlaywrightBrowserType = interpBrowserPlaywrightBrowserType opts
+ , wasmInterpBrowserPlaywrightLaunchOpts = interpBrowserPlaywrightLaunchOpts opts
+ , wasmInterpTargetPlatform = platform
+ , wasmInterpProfiled = profiled
+ , wasmInterpHsSoSuffix = way_tag ++ dynLibSuffix (interpNameVer opts)
+ , wasmInterpUnitState = ue_homeUnitState unit_env
+ }
+ pure $ Just $ Interp (ExternalInterp $ ExtWasm $ ExtInterpState cfg s) loader lookup_cache
+#endif
+
+ -- JavaScript interpreter
+ | ArchJavaScript <- platformArch platform
+ -> do
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ let cfg = JSInterpConfig
+ { jsInterpNodeConfig = defaultNodeJsSettings
+ , jsInterpScript = interpJsInterp opts
+ , jsInterpTmpFs = tmpfs
+ , jsInterpTmpDir = interpTmpDir opts
+ , jsInterpLogger = logger
+ , jsInterpCodegenCfg = interpJsCodegenCfg opts
+ , jsInterpUnitEnv = unit_env
+ , jsInterpFinderOpts = interpFinderOpts opts
+ , jsInterpFinderCache = finder_cache
+ }
+ return (Just (Interp (ExternalInterp (ExtJS (ExtInterpState cfg s))) loader lookup_cache))
+
+ -- external interpreter
+ | interpExternal opts
+ -> do
+ let
+ profiled = interpWays opts `hasWay` WayProf
+ dynamic = interpWays opts `hasWay` WayDyn
+ prog <- case interpProg opts of
+ -- build iserv program if none specified
+ "" -> generateIservC logger tmpfs (interpExecutableLinkOpts opts) unit_env
+ _ -> pure (interpProg opts ++ flavour)
+ where
+ flavour
+ | profiled && dynamic = "-prof-dyn"
+ | profiled = "-prof"
+ | dynamic = "-dyn"
+ | otherwise = ""
+ let msg = text "Starting " <> text prog
+ tr <- if interpVerbosity opts >= 3
+ then return (logInfo logger $ withPprStyle defaultDumpStyle msg)
+ else return (pure ())
+ let
+ conf = IServConfig
+ { iservConfProgram = prog
+ , iservConfOpts = interpOpts opts
+ , iservConfProfiled = profiled
+ , iservConfDynamic = dynamic
+ , iservConfHook = interpCreateProcess opts
+ , iservConfTrace = tr
+ }
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ return (Just (Interp (ExternalInterp (ExtIServ (ExtInterpState conf s))) loader lookup_cache))
+
+ -- Internal interpreter
+ | otherwise
+ ->
+#if defined(HAVE_INTERNAL_INTERPRETER)
+ do
+ loader <- liftIO Loader.uninitializedLoader
+ return (Just (Interp InternalInterp loader lookup_cache))
+#else
+ return Nothing
+#endif
=====================================
compiler/GHC/SysTools/Tasks.hs
=====================================
@@ -13,7 +13,11 @@ module GHC.SysTools.Tasks
, runSourceCodePreprocessor
, runPp
, runCc
+ , configureCc
+ , CcConfig (..)
+ , configureLd
, askLd
+ , LdConfig(..)
, runAs
, runLlvmOpt
, runLlvmLlc
@@ -22,10 +26,20 @@ module GHC.SysTools.Tasks
, figureLlvmVersion
, runMergeObjects
, runAr
+ , ArConfig (..)
+ , configureAr
, askOtool
+ , configureOtool
+ , OtoolConfig (..)
, runInstallNameTool
+ , InstallNameConfig (..)
+ , configureInstallName
, runRanlib
+ , RanlibConfig (..)
+ , configureRanlib
, runWindres
+ , WindresConfig (..)
+ , configureWindres
) where
import GHC.Prelude
@@ -207,15 +221,32 @@ runPp logger dflags args = traceSystoolCommand logger "pp" $ do
opts = map Option (getOpts dflags opt_F)
runSomething logger "Haskell pre-processor" prog (args ++ opts)
+data CcConfig = CcConfig
+ { ccProg :: String
+ , cxxProg :: String
+ , ccOpts :: [String]
+ , cxxOpts :: [String]
+ , ccPicOpts :: [String]
+ }
+
+configureCc :: DynFlags -> CcConfig
+configureCc dflags = CcConfig
+ { ccProg = pgm_c dflags
+ , cxxProg = pgm_cxx dflags
+ , ccOpts = getOpts dflags opt_c
+ , cxxOpts = getOpts dflags opt_cxx
+ , ccPicOpts = picCCOpts dflags
+ }
+
-- | Run compiler of C-like languages and raw objects (such as gcc or clang).
-runCc :: Maybe ForeignSrcLang -> Logger -> TmpFs -> DynFlags -> [Option] -> IO ()
-runCc mLanguage logger tmpfs dflags args = traceSystoolCommand logger "cc" $ do
+runCc :: Maybe ForeignSrcLang -> Logger -> TmpFs -> TempDir -> CcConfig -> [Option] -> IO ()
+runCc mLanguage logger tmpfs tmpdir opts args = traceSystoolCommand logger "cc" $ do
let args1 = map Option userOpts
args2 = languageOptions ++ args ++ args1
-- We take care to pass -optc flags in args1 last to ensure that the
-- user can override flags passed by GHC. See #14452.
mb_env <- getGccEnv args2
- runSomethingResponseFile logger tmpfs (tmpDir dflags) cc_filter dbgstring prog args2
+ runSomethingResponseFile logger tmpfs tmpdir cc_filter dbgstring prog args2
mb_env
where
-- force the C compiler to interpret this file as C when
@@ -223,38 +254,49 @@ runCc mLanguage logger tmpfs dflags args = traceSystoolCommand logger "cc" $ do
-- Also useful for plain .c files, just in case GHC saw a
-- -x c option.
(languageOptions, userOpts, prog, dbgstring) = case mLanguage of
- Nothing -> ([], userOpts_c, pgm_c dflags, "C Compiler")
- Just language -> ([Option "-x", Option languageName], opts, prog, dbgstr)
+ Nothing -> ([], ccOpts opts, ccProg opts, "C Compiler")
+ Just language -> ([Option "-x", Option languageName], copts, prog, dbgstr)
where
- (languageName, opts, prog, dbgstr) = case language of
- LangC -> ("c", userOpts_c
- ,pgm_c dflags, "C Compiler")
- LangCxx -> ("c++", userOpts_cxx
- ,pgm_cxx dflags , "C++ Compiler")
- LangObjc -> ("objective-c", userOpts_c
- ,pgm_c dflags , "Objective C Compiler")
- LangObjcxx -> ("objective-c++", userOpts_cxx
- ,pgm_cxx dflags, "Objective C++ Compiler")
+ (languageName, copts, prog, dbgstr) = case language of
+ LangC -> ("c", ccOpts opts
+ ,ccProg opts, "C Compiler")
+ LangCxx -> ("c++", cxxOpts opts
+ ,cxxProg opts, "C++ Compiler")
+ LangObjc -> ("objective-c", ccOpts opts
+ ,ccProg opts, "Objective C Compiler")
+ LangObjcxx -> ("objective-c++", cxxOpts opts
+ ,cxxProg opts, "Objective C++ Compiler")
LangAsm -> ("assembler", []
- ,pgm_c dflags, "Asm Compiler")
+ ,ccProg opts, "Asm Compiler")
RawObject -> ("c", []
- ,pgm_c dflags, "C Compiler") -- claim C for lack of a better idea
+ ,ccProg opts, "C Compiler") -- claim C for lack of a better idea
--JS backend shouldn't reach here, so we just pass
-- strings to satisfy the totality checker
LangJs -> ("js", []
- ,pgm_c dflags, "JS Backend Compiler")
- userOpts_c = getOpts dflags opt_c
- userOpts_cxx = getOpts dflags opt_cxx
+ ,ccProg opts, "JS Backend Compiler")
isContainedIn :: String -> String -> Bool
xs `isContainedIn` ys = any (xs `isPrefixOf`) (tails ys)
--- | Run the linker with some arguments and return the output
-askLd :: Logger -> DynFlags -> [Option] -> IO String
-askLd logger dflags args = traceSystoolCommand logger "linker" $ do
+data LdConfig = LdConfig
+ { ldProg :: String -- ^ LD program path
+ , ldOpts :: [Option] -- ^ LD program arguments
+ }
+
+configureLd :: DynFlags -> LdConfig
+configureLd dflags =
let (p,args0) = pgm_l dflags
args1 = map Option (getOpts dflags opt_l)
- args2 = args0 ++ args1 ++ args
+ in LdConfig
+ { ldProg = p
+ , ldOpts = args0 ++ args1
+ }
+
+-- | Run the linker with some arguments and return the output
+askLd :: Logger -> LdConfig -> [Option] -> IO String
+askLd logger ld_config args = traceSystoolCommand logger "linker" $ do
+ let p = ldProg ld_config
+ args2 = ldOpts ld_config ++ args
mb_env <- getGccEnv args2
runSomethingWith logger "gcc" p args2 $ \real_args ->
readCreateProcessWithExitCode' (proc p real_args){ env = mb_env }
@@ -373,31 +415,80 @@ runMergeObjects logger tmpfs dflags args =
else do
runSomething logger "Merge objects" p args2
-runAr :: Logger -> DynFlags -> Maybe FilePath -> [Option] -> IO ()
-runAr logger dflags cwd args = traceSystoolCommand logger "ar" $ do
- let ar = pgm_ar dflags
+newtype ArConfig = ArConfig
+ { arProg :: String
+ }
+
+configureAr :: DynFlags -> ArConfig
+configureAr dflags = ArConfig
+ { arProg = pgm_ar dflags
+ }
+
+runAr :: Logger -> ArConfig -> Maybe FilePath -> [Option] -> IO ()
+runAr logger opts cwd args = traceSystoolCommand logger "ar" $ do
+ let ar = arProg opts
runSomethingFiltered logger id "Ar" ar args cwd Nothing
-askOtool :: Logger -> ToolSettings -> Maybe FilePath -> [Option] -> IO String
-askOtool logger toolSettings mb_cwd args = do
- let otool = toolSettings_pgm_otool toolSettings
+newtype OtoolConfig = OtoolConfig
+ { otoolProg :: String
+ }
+
+configureOtool :: DynFlags -> OtoolConfig
+configureOtool dflags = OtoolConfig
+ { otoolProg = toolSettings_pgm_otool (toolSettings dflags)
+ }
+
+askOtool :: Logger -> OtoolConfig -> Maybe FilePath -> [Option] -> IO String
+askOtool logger opts mb_cwd args = do
+ let otool = otoolProg opts
runSomethingWith logger "otool" otool args $ \real_args ->
readCreateProcessWithExitCode' (proc otool real_args){ cwd = mb_cwd }
-runInstallNameTool :: Logger -> ToolSettings -> [Option] -> IO ()
-runInstallNameTool logger toolSettings args = do
- let tool = toolSettings_pgm_install_name_tool toolSettings
+newtype InstallNameConfig = InstallNameConfig
+ { installNameProg :: String
+ }
+
+configureInstallName :: DynFlags -> InstallNameConfig
+configureInstallName dflags = InstallNameConfig
+ { installNameProg = toolSettings_pgm_install_name_tool (toolSettings dflags)
+ }
+
+runInstallNameTool :: Logger -> InstallNameConfig -> [Option] -> IO ()
+runInstallNameTool logger opts args = do
+ let tool = installNameProg opts
runSomethingFiltered logger id "Install Name Tool" tool args Nothing Nothing
-runRanlib :: Logger -> DynFlags -> [Option] -> IO ()
-runRanlib logger dflags args = traceSystoolCommand logger "ranlib" $ do
- let ranlib = pgm_ranlib dflags
+newtype RanlibConfig = RanlibConfig
+ { ranlibProg :: String
+ }
+
+configureRanlib :: DynFlags -> RanlibConfig
+configureRanlib dflags = RanlibConfig
+ { ranlibProg = pgm_ranlib dflags
+ }
+
+runRanlib :: Logger -> RanlibConfig -> [Option] -> IO ()
+runRanlib logger opts args = traceSystoolCommand logger "ranlib" $ do
+ let ranlib = ranlibProg opts
runSomethingFiltered logger id "Ranlib" ranlib args Nothing Nothing
-runWindres :: Logger -> DynFlags -> [Option] -> IO ()
-runWindres logger dflags args = traceSystoolCommand logger "windres" $ do
- let cc_args = map Option (sOpt_c (settings dflags))
- windres = pgm_windres dflags
- opts = map Option (getOpts dflags opt_windres)
+data WindresConfig = WindresConfig
+ { windresProg :: String
+ , windresOpts :: [Option]
+ , windresCOpts :: [Option]
+ }
+
+configureWindres :: DynFlags -> WindresConfig
+configureWindres dflags = WindresConfig
+ { windresProg = pgm_windres dflags
+ , windresOpts = map Option (getOpts dflags opt_windres)
+ , windresCOpts = map Option (sOpt_c (settings dflags))
+ }
+
+runWindres :: Logger -> WindresConfig -> [Option] -> IO ()
+runWindres logger opts args = traceSystoolCommand logger "windres" $ do
+ let cc_args = windresCOpts opts
+ windres = windresProg opts
+ wopts = windresOpts opts
mb_env <- getGccEnv cc_args
- runSomethingFiltered logger id "Windres" windres (opts ++ args) Nothing mb_env
+ runSomethingFiltered logger id "Windres" windres (wopts ++ args) Nothing mb_env
=====================================
compiler/ghc.cabal.in
=====================================
@@ -515,6 +515,7 @@ Library
GHC.Driver.Config.HsToCore
GHC.Driver.Config.HsToCore.Ticks
GHC.Driver.Config.HsToCore.Usage
+ GHC.Driver.Config.Interpreter
GHC.Driver.Config.Linker
GHC.Driver.Config.Logger
GHC.Driver.Config.Parser
@@ -650,7 +651,7 @@ Library
GHC.Linker.Deps
GHC.Linker.Dynamic
GHC.Linker.External
- GHC.Linker.ExtraObj
+ GHC.Linker.Executable
GHC.Linker.Loader
GHC.Linker.MacOS
GHC.Linker.Static
@@ -723,6 +724,8 @@ Library
GHC.Runtime.Heap.Inspect
GHC.Runtime.Heap.Layout
GHC.Runtime.Interpreter
+ GHC.Runtime.Interpreter.C
+ GHC.Runtime.Interpreter.Init
GHC.Runtime.Interpreter.JS
GHC.Runtime.Interpreter.Process
GHC.Runtime.Interpreter.Types
=====================================
testsuite/tests/driver/T24731.hs
=====================================
@@ -0,0 +1,5 @@
+{-# LANGUAGE TemplateHaskell #-}
+module T24731 where
+
+foo :: Int
+foo = $([|10|])
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -333,3 +333,4 @@ test('T25382', normal, makefile_test, [])
test('T26018', req_c, makefile_test, [])
test('T24120', normal, compile, ['-Wunused-packages -hide-all-packages -package base -package system-cxx-std-lib'])
test('T26551', [extra_files(['T26551.hs'])], makefile_test, [])
+test('T24731', [only_ways(['ext-interp'])], compile, ['-fexternal-interpreter -pgmi ""'])
=====================================
utils/iserv/iserv.cabal.in
=====================================
@@ -30,15 +30,6 @@ Executable iserv
C-Sources: cbits/iservmain.c
Hs-Source-Dirs: src
include-dirs: .
- Build-Depends: array >= 0.5 && < 0.6,
- base >= 4 && < 5,
- binary >= 0.7 && < 0.11,
- bytestring >= 0.10 && < 0.13,
- containers >= 0.5 && < 0.9,
- deepseq >= 1.4 && < 1.6,
- ghci == @ProjectVersionMunged@
-
- if os(windows)
- Cpp-Options: -DWINDOWS
- else
- Build-Depends: unix >= 2.7 && < 2.9
+ Build-Depends:
+ base >= 4 && < 5,
+ ghci == @ProjectVersionMunged@
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/55eab80d337e47decacbe979c29a1b7…
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[Git][ghc/ghc] Pushed new branch wip/TTG-language-haskell
by recursion-ninja (＠recursion-ninja) 20 Nov '25
by recursion-ninja (＠recursion-ninja) 20 Nov '25
20 Nov '25
recursion-ninja pushed new branch wip/TTG-language-haskell at Glasgow Haskell Compiler / GHC
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[Git][ghc/ghc][wip/amg/castz] 534 commits: Make GHCi commands compatible with multiple home units
by Adam Gundry (＠adamgundry) 20 Nov '25
by Adam Gundry (＠adamgundry) 20 Nov '25
20 Nov '25
Adam Gundry pushed to branch wip/amg/castz at Glasgow Haskell Compiler / GHC
Commits:
5f213bff by fendor at 2025-06-02T09:16:24+02:00
Make GHCi commands compatible with multiple home units
=== Design
We enable all GHCi features that were previously guarded by the `inMulti`
option.
GHCi supported multiple home units up to a certain degree for quite a while now.
The supported feature set was limited, due to a design impasse:
One of the home units must be "active", e.g., there must be one `HomeUnit`
whose `UnitId` is "active" which is returned when calling
```haskell
do
hscActiveUnitId <$> getSession
```
This makes sense in a GHC session, since you are always compiling a particular
Module, but it makes less intuitive sense in an interactive session.
Given an expression to evaluate, we can't easily tell in which "context" the expression
should be parsed, typechecked and evaluated.
That's why initially, most of GHCi features, except for `:reload`ing were disabled
if the GHCi session had more than one `HomeUnitEnv`.
We lift this restriction, enabling all features of GHCi for the multiple home unit case.
To do this, we fundamentally change the `HomeUnitEnv` graph to be multiple home unit first.
Instead of differentiating the case were we have a single home unit and multiple,
we now always set up a multiple home unit session that scales seamlessly to an arbitrary
amount of home units.
We introduce two new `HomeUnitEnv`s that are always added to the `HomeUnitGraph`.
They are:
The "interactive-ghci", called the `interactiveGhciUnit`, contains the same
`DynFlags` that are used by the `InteractiveContext` for interactive evaluation
of expressions.
This `HomeUnitEnv` is only used on the prompt of GHCi, so we may refer to it as
"interactive-prompt" unit.
See Note [Relation between the `InteractiveContext` and `interactiveGhciUnitId`]
for discussing its role.
And the "interactive-session"", called `interactiveSessionUnit` or
`interactiveSessionUnitId`, which is used for loading Scripts into
GHCi that are not `Target`s of any home unit, via `:load` or `:add`.
Both of these "interactive" home units depend on all other `HomeUnitEnv`s that
are passed as arguments on the cli.
Additionally, the "interactive-ghci" unit depends on `interactive-session`.
We always evaluate expressions in the context of the
"interactive-ghci" session.
Since "interactive-ghci" depends on all home units, we can import any `Module`
from the other home units with ease.
As we have a clear `HomeUnitGraph` hierarchy, we can set `interactiveGhciUnitId`
as the active home unit for the full duration of the GHCi session.
In GHCi, we always set `interactiveGhciUnitId` to be the currently active home unit.
=== Implementation Details
Given this design idea, the implementation is relatively straight
forward.
The core insight is that a `ModuleName` is not sufficient to identify a
`Module` in the `HomeUnitGraph`. Thus, large parts of the PR is simply
about refactoring usages of `ModuleName` to prefer `Module`, which has a
`Unit` attached and is unique over the `HomeUnitGraph`.
Consequentially, most usages of `lookupHPT` are likely to be incorrect and have
been replaced by `lookupHugByModule` which is keyed by a `Module`.
In `GHCi/UI.hs`, we make sure there is only one location where we are
actually translating `ModuleName` to a `Module`:
* `lookupQualifiedModuleName`
If a `ModuleName` is ambiguous, we detect this and report it to the
user.
To avoid repeated lookups of `ModuleName`s, we store the `Module` in the
`InteractiveImport`, which additionally simplifies the interface
loading.
A subtle detail is that the `DynFlags` of the `InteractiveContext` are
now stored both in the `HomeUnitGraph` and in the `InteractiveContext`.
In UI.hs, there are multiple code paths where we are careful to update
the `DynFlags` in both locations.
Most importantly in `addToProgramDynFlags`.
---
There is one metric increase in this commit:
-------------------------
Metric Increase:
T4029
-------------------------
It is an increase from 14.4 MB to 16.1 MB (+11.8%) which sounds like a
pretty big regression at first.
However, we argue this increase is solely caused by using more data
structures for managing multiple home units in the GHCi session.
In particular, due to the design decision of using three home units, the
base memory usage increases... but by how much?
A big contributor is the `UnitState`, of which we have three now, which
on its own 260 KB per instance. That makes an additional memory usage of
520 KB, already explaining a third of the overall memory usage increase.
Then we store more elements in the `HomeUnitGraph`, we have more
`HomeUnitEnv` entries, etc...
While we didn't chase down each byte, we looked at the memory usage over time
for both `-hi` and `-hT` profiles and can say with confidence while the memory
usage increased slightly, we did not introduce any space leak, as
the graph looks almost identical as the memory usage graph of GHC HEAD.
---
Adds testcases for GHCi multiple home units session
* Test truly multiple home unit sessions, testing reload logic and code evaluation.
* Test that GHCi commands such as `:all-types`, `:browse`, etc., work
* Object code reloading for home modules
* GHCi debugger multiple home units session
- - - - -
de603d01 by fendor at 2025-06-02T09:16:24+02:00
Update "loading compiled code" GHCi documentation
To use object code in GHCi, the module needs to be compiled for use in
GHCi. To do that, users need to compile their modules with:
* `-dynamic`
* `-this-unit-id interactive-session`
Otherwise, the interface files will not match.
- - - - -
b255a8ca by Vladislav Zavialov at 2025-06-02T16:00:12-04:00
docs: Fix code example for NoListTuplePuns
Without the fix, the example produces an error:
Test.hs:11:3: error: [GHC-45219]
• Data constructor ‘Tuple’ returns type ‘Tuple2 a b’
instead of an instance of its parent type ‘Tuple a’
• In the definition of data constructor ‘Tuple’
In the data type declaration for ‘Tuple’
Fortunately, a one line change makes it compile.
- - - - -
6558467c by Ryan Hendrickson at 2025-06-06T05:46:58-04:00
haddock: Parse math even after ordinary characters
Fixes a bug where math sections were not recognized if preceded by a
character that isn't special (like space or a markup character).
- - - - -
265d0024 by ARATA Mizuki at 2025-06-06T05:47:48-04:00
AArch64 NCG: Fix sub-word arithmetic right shift
As noted in Note [Signed arithmetic on AArch64], we should zero-extend sub-word values.
Fixes #26061
- - - - -
05e9be18 by Simon Hengel at 2025-06-06T05:48:35-04:00
Allow Unicode in "message" and "hints" with -fdiagnostics-as-json
(fixes #26075)
- - - - -
bfa6b70f by ARATA Mizuki at 2025-06-06T05:49:24-04:00
x86 NCG: Fix code generation of bswap64 on i386
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
Fix #25601
- - - - -
35826d8b by Matthew Pickering at 2025-06-08T22:00:41+01:00
Hadrian: Add option to generate .hie files for stage1 libraries
The +hie_files flavour transformer can be enabled to produce hie files
for stage1 libraries. The hie files are produced in the
"extra-compilation-artifacts" folder and copied into the resulting
bindist.
At the moment the hie files are not produced for the release flavour,
they add about 170M to the final bindist.
Towards #16901
- - - - -
e2467dbd by Ryan Hendrickson at 2025-06-09T13:07:05-04:00
Fix various failures to -fprint-unicode-syntax
- - - - -
1d99d3e4 by maralorn at 2025-06-12T03:47:39-04:00
Add necessary flag for js linking
- - - - -
974d5734 by maralorn at 2025-06-12T03:47:39-04:00
Don’t use additional linker flags to detect presence of -fno-pie in configure.ac
This mirrors the behavior of ghc-toolchain
- - - - -
1e9eb118 by Andrew Lelechenko at 2025-06-12T03:48:21-04:00
Add HasCallStack to Control.Monad.Fail.fail
CLC proposal https://github.com/haskell/core-libraries-committee/issues/327
2% compile-time allocations increase in T3064, likely because `fail`
is now marginally more expensive to compile.
Metric Increase:
T3064
- - - - -
6d12060f by meooow25 at 2025-06-12T14:26:07-04:00
Bump containers submodule to 0.8
Also
* Disable -Wunused-imports for containers
* Allow containers-0.8 for in-tree packages
* Bump some submodules so that they allow containers-0.8. These are not
at any particular versions.
* Remove unused deps containers and split from ucd2haskell
* Fix tests affected by the new containers and hpc-bin
- - - - -
537bd233 by Peng Fan at 2025-06-12T14:27:02-04:00
NCG/LA64: Optimize code generation and reduce build-directory size.
1. makeFarBranches: Prioritize fewer instruction sequences.
2. Prefer instructions with immediate numbers to reduce register moves,
e.g. andi,ori,xori,addi.
3. Ppr: Remove unnecessary judgments.
4. genJump: Avoid "ld+jr" as much as possible.
5. BCOND and BCOND1: Implement conditional jumps with two jump ranges,
with limited choice of the shortest.
6. Implement FSQRT, CLT, CTZ.
7. Remove unnecessary code.
- - - - -
19f20861 by Simon Peyton Jones at 2025-06-13T09:51:11-04:00
Improve redundant constraints for instance decls
Addresses #25992, which showed that the default methods
of an instance decl could make GHC fail to report redundant
constraints.
Figuring out how to do this led me to refactor the computation
of redundant constraints. See the entirely rewritten
Note [Tracking redundant constraints]
in GHC.Tc.Solver.Solve
- - - - -
1d02798e by Matthew Pickering at 2025-06-13T09:51:54-04:00
Refactor the treatment of nested Template Haskell splices
* The difference between a normal splice, a quasiquoter and implicit
splice caused by lifting is stored in the AST after renaming.
* Information that the renamer learns about splices is stored in the
relevant splice extension points (XUntypedSpliceExpr, XQuasiQuote).
* Normal splices and quasi quotes record the flavour of splice
(exp/pat/dec etc)
* Implicit lifting stores information about why the lift was attempted,
so if it fails, that can be reported to the user.
* After renaming, the decision taken to attempt to implicitly lift a
variable is stored in the `XXUntypedSplice` extension field in the
`HsImplicitLiftSplice` constructor.
* Since all the information is stored in the AST, in `HsUntypedSplice`,
the type of `PendingRnSplice` now just stores a `HsUntypedSplice`.
* Error messages since the original program can be easily
printed, this is noticeable in the case of implicit lifting.
* The user-written syntax is directly type-checked. Before, some
desugaring took place in the
* Fixes .hie files to work better with nested splices (nested splices
are not indexed)
* The location of the quoter in a quasiquote is now located, so error
messages will precisely point to it (and again, it is indexed by hie
files)
In the future, the typechecked AST should also retain information about
the splices and the specific desugaring being left to the desugarer.
Also, `runRnSplice` should call `tcUntypedSplice`, otherwise the
typechecking logic is duplicated (see the `QQError` and `QQTopError`
tests for a difference caused by this).
- - - - -
f93798ba by Cheng Shao at 2025-06-13T09:52:35-04:00
libffi: update to 3.5.1
Bumps libffi submodule.
- - - - -
c7aa0c10 by Andreas Klebinger at 2025-06-15T05:47:24-04:00
Revert "Specialise: Don't float out constraint components."
This reverts commit c9abb87ccc0c91cd94f42b3e36270158398326ef.
Turns out two benchmarks from #19747 regresses by a factor of 7-8x if
we do not float those out.
- - - - -
fd998679 by Krzysztof Gogolewski at 2025-06-15T05:48:06-04:00
Fix EPT enforcement when mixing unboxed tuples and non-tuples
The code was assuming that an alternative cannot be returning a normal
datacon and an unboxed tuple at the same time. However, as seen in #26107,
this can happen when using a GADT to refine the representation type.
The solution is just to conservatively return TagDunno.
- - - - -
e64b3f16 by ARATA Mizuki at 2025-06-17T10:13:42+09:00
MachRegs.h: Don't define NO_ARG_REGS when a XMM register is defined
On i386, MAX_REAL_VANILLA_REG is 1, but MAX_REAL_XMM_REG is 4.
If we define NO_ARG_REGS on i386, programs that use SIMD vectors may segfault.
Closes #25985
A couple of notes on the BROKEN_TESTS field:
* This fixes the segfault from T25062_V16.
* The failure from T22187_run was fixed in an earlier commit (see #25561),
but BROKEN_TESTS was missed at that time. Now should be a good time to
mark it fixed.
- - - - -
3e7c6b4d by Matthew Pickering at 2025-06-18T15:34:04-04:00
Improve error messages when implicit lifting fails
This patch concerns programs which automatically try to fix level errors
by inserting `Lift`. For example:
```
foo x = [| x |]
~>
foo x = [| $(lift x) |]
```
Before, there were two problems with the message.
1. (#26031), the location of the error was reported as the whole
quotation.
2. (#26035), the message just mentions there is no Lift instance, but
gives no indicate why the user program needed a Lift instance in the
first place.
This problem is especially bad when you disable
`ImplicitStagePersistence`, so you just end up with a confusing "No
instance for" message rather than an error message about levels
This patch fixes both these issues.
Firstly, `PendingRnSplice` differentiates between a user-written splice
and an implicit lift. Then, the Lift instance is precisely requested
with a specific origin in the typechecker. If the instance fails to be
solved, the message is reported using the `TcRnBadlyLevelled`
constructor (like a normal level error).
Fixes #26031, #26035
- - - - -
44b8cee2 by Cheng Shao at 2025-06-18T15:34:46-04:00
testsuite: add T26120 marked as broken
- - - - -
894a04f3 by Cheng Shao at 2025-06-18T15:34:46-04:00
compiler: fix GHC.SysTools.Ar archive member size writing logic
This patch fixes a long-standing bug in `GHC.SysTools.Ar` that emits
the wrong archive member size in each archive header. It should encode
the exact length of the member payload, excluding any padding byte,
otherwise malformed archive that extracts a broken object with an
extra trailing byte could be created.
Apart from the in-tree `T26120` test, I've also created an out-of-tree
testsuite at https://github.com/TerrorJack/ghc-ar-quickcheck that
contains QuickCheck roundtrip tests for `GHC.SysTools.Ar`. With this
fix, simple roundtrip tests and `writeGNUAr`/GNU `ar` roundtrip test
passes. There might be more bugs lurking in here, but this patch is
still a critical bugfix already.
Fixes #26120 #22586.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
f677ab5f by Lauren Yim at 2025-06-18T15:35:37-04:00
fix some typos in the warnings page in the user guide
- - - - -
b968e1c1 by Rodrigo Mesquita at 2025-06-18T15:36:18-04:00
Add a frozen callstack to throwGhcException
Fixes #25956
- - - - -
a5e0c3a3 by fendor at 2025-06-18T15:36:59-04:00
Update using.rst to advertise full mhu support for GHCi
- - - - -
d3e60e97 by Ryan Scott at 2025-06-18T22:29:21-04:00
Deprecate -Wdata-kinds-tc, make DataKinds issues in typechecker become errors
!11314 introduced the `-Wdata-kinds-tc` warning as part of a fix for #22141.
This was a temporary stopgap measure to allow users who were accidentally
relying on code which needed the `DataKinds` extension in order to typecheck
without having to explicitly enable the extension.
Now that some amount of time has passed, this patch deprecates
`-Wdata-kinds-tc` and upgrades any `DataKinds`-related issues in the
typechecker (which were previously warnings) into errors.
- - - - -
fd5b5177 by Ryan Hendrickson at 2025-06-18T22:30:06-04:00
haddock: Add redact-type-synonyms pragma
`{-# OPTIONS_HADDOCK redact-type-synonyms #-}` pragma will hide the RHS
of type synonyms, and display the result kind instead, if the RHS
contains any unexported types.
- - - - -
fbc0b92a by Vladislav Zavialov at 2025-06-22T04:25:16+03:00
Visible forall in GADTs (#25127)
Add support for visible dependent quantification `forall a -> t` in
types of data constructors, e.g.
data KindVal a where
K :: forall k.
forall (a::k) -> -- now allowed!
k ->
KindVal a
For details, see docs/users_guide/exts/required_type_arguments.rst,
which has gained a new subsection.
DataCon in compiler/GHC/Core/DataCon.hs
---------------------------------------
The main change in this patch is that DataCon, the Core representation
of a data constructor, now uses a different type to store user-written
type variable binders:
- dcUserTyVarBinders :: [InvisTVBinder]
+ dcUserTyVarBinders :: [TyVarBinder]
where
type TyVarBinder = VarBndr TyVar ForAllTyFlag
type InvisTVBinder = VarBndr TyVar Specificity
and
data Specificity = InferredSpec | SpecifiedSpec
data ForAllTyFlag = Invisible Specificity | Required
This change necessitates some boring, mechanical changes scattered
throughout the diff:
... is now used in place of ...
-----------------+---------------
TyVarBinder | InvisTVBinder
IfaceForAllBndr | IfaceForAllSpecBndr
Specified | SpecifiedSpec
Inferred | InferredSpec
mkForAllTys | mkInvisForAllTys
additionally,
tyVarSpecToBinders -- added or removed calls
ifaceForAllSpecToBndrs -- removed calls
Visibility casts in mkDataConRep
--------------------------------
Type abstractions in Core (/\a. e) always have type (forall a. t)
because coreTyLamForAllTyFlag = Specified. This is also true of data
constructor workers. So we may be faced with the following:
data con worker: (forall a. blah)
data con wrapper: (forall a -> blah)
In this case the wrapper must use a visibility cast (e |> ForAllCo ...)
with appropriately set fco_vis{L,R}. Relevant functions:
mkDataConRep in compiler/GHC/Types/Id/Make.hs
dataConUserTyVarBindersNeedWrapper in compiler/GHC/Core/DataCon.hs
mkForAllVisCos in compiler/GHC/Core/Coercion.hs
mkCoreTyLams in compiler/GHC/Core/Make.hs
mkWpForAllCast in compiler/GHC/Tc/Types/Evidence.hs
More specifically:
- dataConUserTyVarBindersNeedWrapper has been updated to answer "yes"
if there are visible foralls in the type of the data constructor.
- mkDataConRep now uses mkCoreTyLams to generate the big lambda
abstractions (/\a b c. e) in the data con wrapper.
- mkCoreTyLams is a variant of mkCoreLams that applies visibility casts
as needed. It similar in purpose to the pre-existing mkWpForAllCast,
so the common bits have been factored out into mkForAllVisCos.
ConDecl in compiler/Language/Haskell/Syntax/Decls.hs
----------------------------------------------------
The surface syntax representation of a data constructor declaration is
ConDecl. In accordance with the proposal, only GADT syntax is extended
with support for visible forall, so we are interested in ConDeclGADT.
ConDeclGADT's field con_bndrs has been renamed to con_outer_bndrs
and is now accompanied by con_inner_bndrs:
con_outer_bndrs :: XRec pass (HsOuterSigTyVarBndrs pass)
con_inner_bndrs :: [HsForAllTelescope pass]
Visible foralls always end up in con_inner_bndrs. The outer binders are
stored and processed separately to support implicit quantification and
the forall-or-nothing rule, a design established by HsSigType.
A side effect of this change is that even in absence of visible foralls,
GHC now permits multiple invisible foralls, e.g.
data T a where { MkT :: forall a b. forall c d. ... -> T a }
But of course, this is done in service of making at least some of these
foralls visible. The entire compiler front-end has been updated to deal
with con_inner_bndrs. See the following modified or added functions:
Parser:
mkGadtDecl in compiler/GHC/Parser/PostProcess.hs
splitLHsGadtTy in compiler/GHC/Hs/Type.hs
Pretty-printer:
pprConDecl in compiler/GHC/Hs/Decls.hs
pprHsForAllTelescope in compiler/GHC/Hs/Type.hs
Renamer:
rnConDecl in compiler/GHC/Rename/Module.hs
bindHsForAllTelescopes in compiler/GHC/Rename/HsType.hs
extractHsForAllTelescopes in compiler/GHC/Rename/HsType.hs
Type checker:
tcConDecl in compiler/GHC/Tc/TyCl.hs
tcGadtConTyVarBndrs in compiler/GHC/Tc/Gen/HsType.hs
Template Haskell
----------------
The TH AST is left unchanged for the moment to avoid breakage. An
attempt to quote or reify a data constructor declaration with visible
forall in its type will result an error:
data ThRejectionReason -- in GHC/HsToCore/Errors/Types.hs
= ...
| ThDataConVisibleForall -- new error constructor
However, as noted in the previous section, GHC now permits multiple
invisible foralls, and TH was updated accordingly. Updated code:
repC in compiler/GHC/HsToCore/Quote.hs
reifyDataCon in compiler/GHC/Tc/Gen/Splice.hs
ppr @Con in libraries/ghc-boot-th/GHC/Boot/TH/Ppr.hs
Pattern matching
----------------
Everything described above concerns data constructor declarations, but
what about their use sites? Now it is trickier to type check a pattern
match fn(Con a b c)=... because we can no longer assume that a,b,c are
all value arguments. Indeed, some or all of them may very well turn out
to be required type arguments.
To that end, see the changes to:
tcDataConPat in compiler/GHC/Tc/Gen/Pat.hs
splitConTyArgs in compiler/GHC/Tc/Gen/Pat.hs
and the new helpers split_con_ty_args, zip_pats_bndrs.
This is also the reason the TcRnTooManyTyArgsInConPattern error
constructor has been removed. The new code emits TcRnArityMismatch
or TcRnIllegalInvisibleTypePattern.
Summary
-------
DataCon, ConDecl, as well as all related functions have been updated to
support required type arguments in data constructors.
Test cases:
HieGadtConSigs GadtConSigs_th_dump1 GadtConSigs_th_pprint1
T25127_data T25127_data_inst T25127_infix
T25127_newtype T25127_fail_th_quote T25127_fail_arity
TyAppPat_Tricky
Co-authored-by: mniip <mniip(a)mniip.com>
- - - - -
ae003a3a by Teo Camarasu at 2025-06-23T05:21:48-04:00
linters: lint-whitespace: bump upper-bound for containers
The version of containers was bumped in https://gitlab.haskell.org/ghc/ghc/-/merge_requests/13989
- - - - -
0fb37893 by Matthew Pickering at 2025-06-23T13:55:10-04:00
Move ModuleGraph into UnitEnv
The ModuleGraph is a piece of information associated with the
ExternalPackageState and HomeUnitGraph. Therefore we should store it
inside the HomeUnitEnv.
- - - - -
3bf6720e by soulomoon at 2025-06-23T13:55:52-04:00
Remove hptAllFamInstances usage during upsweep
Fixes #26118
This change eliminates the use of hptAllFamInstances during the upsweep phase,
as it could access non-below modules from the home package table.
The following updates were made:
* Updated checkFamInstConsistency to accept an explicit ModuleEnv FamInstEnv
parameter and removed the call to hptAllFamInstances.
* Adjusted hugInstancesBelow so we can construct ModuleEnv FamInstEnv
from its result,
* hptAllFamInstances and allFamInstances functions are removed.
- - - - -
83ee7b78 by Ben Gamari at 2025-06-24T05:02:07-04:00
configure: Don't force value of OTOOL, etc. if not present
Previously if `otool` and `install_name_tool` were not present they
would be overridden by `fp_settings.m4`. This logic was introduced in
4ff93292243888545da452ea4d4c1987f2343591 without explanation.
- - - - -
9329c9e1 by Ben Gamari at 2025-06-24T05:02:07-04:00
ghc-toolchain: Add support for otool, install_name_tool
Fixes part of ghc#23675.
- - - - -
25f5c998 by Ben Gamari at 2025-06-24T05:02:08-04:00
ghc-toolchain: Add support for llc, opt, llvm-as
Fixes #23675.
- - - - -
51d150dd by Rodrigo Mesquita at 2025-06-24T05:02:08-04:00
hadrian: Use settings-use-distro-mingw directly
The type `ToolchainSetting` only made sense when we had more settings to
fetch from the system config file. Even then "settings-use-distro-mingw"
is arguably not a toolchain setting.
With the fix for #23675, all toolchain tools were moved to the
`ghc-toolchain` `Toolchain` format. Therefore, we can inline
`settings-use-distro-mingw` accesses and delete `ToolchainSetting`.
- - - - -
dcf68a83 by Rodrigo Mesquita at 2025-06-24T05:02:08-04:00
configure: Check LlvmTarget exists for LlvmAsFlags
If LlvmTarget was empty, LlvmAsFlags would be just "--target=".
If it is empty now, simply keep LlvmAsFlags empty.
ghc-toolchain already does this right. This fix makes the two
configurations match up.
- - - - -
580a3353 by Ben Gamari at 2025-06-24T05:02:51-04:00
rts/linker/LoadArchive: Use bool
Improve type precision by using `bool` instead of `int` and `StgBool`.
- - - - -
76d1041d by Ben Gamari at 2025-06-24T05:02:51-04:00
rts/linker/LoadArchive: Don't rely on file extensions for identification
Previously archive members would be identified via their file extension,
as described in #13103. We now instead use a more principled approach,
relying on the magic number in the member's header.
As well, we refactor treatment of archive format detection to improve
code clarity and error handling.
Closes #13103.
- - - - -
4b748a99 by Teo Camarasu at 2025-06-24T15:31:07-04:00
template-haskell: improve changelog
stable -> more stable, just to clarify that this interface isn't fully stable.
errornously -> mistakenly: I typod this and also let's go for a simpler word
- - - - -
e358e477 by Sylvain Henry at 2025-06-24T15:31:58-04:00
Bump stack resolver to use GHC 9.6.7
Cf #26139
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4bf5eb63 by fendor at 2025-06-25T17:05:43-04:00
Teach `:reload` about multiple home units
`:reload` needs to lookup the `ModuleName` and must not assume the given
`ModuleName` is in the current `HomeUnit`.
We add a new utility function which allows us to find a `HomeUnitModule`
instead of a `Module`.
Further, we introduce the `GhciCommandError` type which can be used to
abort the execution of a GHCi command.
This error is caught and printed in a human readable fashion.
- - - - -
b3d97bb3 by fendor at 2025-06-25T17:06:25-04:00
Implement `-fno-load-initial-targets` flag
We add the new flag `-fno-load-initial-targets` which doesn't load all `Target`s
immediately but only computes the module graph for all `Target`s.
The user can then decide to load modules from that module graph using
the syntax:
ghci> :reload <Mod>
This will load everything in the module graph up to `Mod`.
The user can return to the initial state by using the builtin target
`none` to unload all modules.
ghci> :reload none
Is in principle identical to starting a new session with the
`-fno-load-initial-targets` flag.
The `-fno-load-initial-targets` flag allows for faster startup time of GHCi when a
user has lots of `Target`s.
We additionally extend the `:reload` command to accept multiple
`ModuleName`s. For example:
ghci> :reload <Mod1> <Mod2>
Loads all modules up to the modules `Mod1` and `Mod2`.
- - - - -
49f44e52 by Teo Camarasu at 2025-06-26T04:19:51-04:00
Expose ghc-internal unit id through the settings file
This in combination with the unit id of the compiler library allows
cabal to know of the two unit ids that should not be reinstalled (in
specific circumstances) as:
- when using plugins, we want to link against exactly the compiler unit
id
- when using TemplateHaskell we want to link against exactly the package
that contains the TemplateHaskell interfaces, which is `ghc-internal`
See: <https://github.com/haskell/cabal/issues/10087>
Resolves #25282
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499c4efe by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Fix and clean up capture of timings
* Fixes the typo that caused 'cat ci-timings' to report "no such file or
directory"
* Gave ci_timings.txt a file extension so it may play better with other
systems
* Fixed the use of time_it so all times are recorded
* Fixed time_it to print name along with timing
- - - - -
86c90c9e by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Update collapsible section usage
The syntax apparently changed at some point.
- - - - -
04308ee4 by Bryan Richter at 2025-06-26T04:20:33-04:00
CI: Add more collapsible sections
- - - - -
43b606bb by Florian Ragwitz at 2025-06-27T16:31:26-04:00
Tick uses of wildcard/pun field binds as if using the record selector function
Fixes #17834.
See Note [Record-selector ticks] for additional reasoning behind this as well
as an overview of the implementation details and future improvements.
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d4952549 by Ben Gamari at 2025-06-27T16:32:08-04:00
testsuite/caller-cc: Make CallerCc[123] less sensitive
These were previously sensitive to irrelevant changes in program
structure. To avoid this we filter out all by lines emitted by the
-fcaller-cc from the profile.
- - - - -
8d33d048 by Berk Özkütük at 2025-07-07T20:42:20-04:00
Consider `PromotedDataCon` in `tyConStupidTheta`
Haddock checks data declarations for the stupid theta so as not to
pretty-print them as empty contexts. Type data declarations end up as
`PromotedDataCon`s by the time Haddock performs this check, causing a
panic. This commit extends `tyConStupidTheta` so that it returns an
empty list for `PromotedDataCon`s. This decision was guided by the fact
that type data declarations never have data type contexts (see (R1) in
Note [Type data declarations]).
Fixes #25739.
- - - - -
a26243fd by Ryan Hendrickson at 2025-07-07T20:43:07-04:00
haddock: Document instances from other packages
When attaching instances to `Interface`s, it isn't enough just to look
for instances in the list of `Interface`s being processed. We also need
to look in the modules on which they depend, including those outside of
this package.
Fixes #25147.
Fixes #26079.
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0fb24420 by Rodrigo Mesquita at 2025-07-07T20:43:49-04:00
hadrian: Fallback logic for internal interpreter
When determining whether to build the internal interpreter, the `make`
build system had a fallback case for platforms not in the list of
explicitly-supported operating systems and architectures.
This fallback says we should try to build the internal interpreter if
building dynamic GHC programs (if the architecture is unknown).
Fixes #24098
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fe925bd4 by Ben Gamari at 2025-07-07T20:44:30-04:00
users-guide: Reference Wasm FFI section
- - - - -
5856284b by Ben Gamari at 2025-07-07T20:44:30-04:00
users-guide: Fix too-short heading warning
- - - - -
a48dcdf3 by Duncan Coutts at 2025-07-07T20:45:18-04:00
Reorganise documentation for allocate* functions
Consolodate interface information into the .h file, keeping just
implementation details in the .c file.
Use Notes stlye in the .h file and refer to notes from the .c file.
- - - - -
de5b528c by Duncan Coutts at 2025-07-07T20:45:18-04:00
Introduce common utilities for allocating arrays
The intention is to share code among the several places that do this
already.
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b321319d by Duncan Coutts at 2025-07-07T20:45:18-04:00
Use new array alloc utils in Heap.c
The CMM primop can now report heap overflow.
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1d557ffb by Duncan Coutts at 2025-07-07T20:45:18-04:00
Use new array alloc utils in ThreadLabels.c
Replacing a local utility.
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e59a1430 by Duncan Coutts at 2025-07-07T20:45:18-04:00
Use new array alloc utils in Threads.c
Replacing local open coded version.
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482df1c9 by Duncan Coutts at 2025-07-07T20:45:18-04:00
Add exitHeapOverflow helper utility
This will be useful with the array alloc functions, since unlike
allocate/allocateMaybeFail, they do not come in two versions. So if it's
not convenient to propagate failure, then one can use this.
- - - - -
4d3ec8f9 by Duncan Coutts at 2025-07-07T20:45:18-04:00
Use new array alloc utils in Weak.c
Also add a cpp macro CCS_SYSTEM_OR_NULL which does what it says. The
benefit of this is that it allows us to referece CCS_SYSTEM even when
we're not in PROFILING mode. That makes abstracting over profiling vs
normal mode a lot easier.
- - - - -
0c4f2fde by Duncan Coutts at 2025-07-07T20:45:18-04:00
Convert the array alloc primops to use the new array alloc utils
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a3354ad9 by Duncan Coutts at 2025-07-07T20:45:18-04:00
While we're at it, add one missing 'likely' hint
To a cmm primops that raises an exception, like the others now do.
- - - - -
33b546bd by meooow25 at 2025-07-07T20:46:09-04:00
Keep scanl' strict in the head on rewrite
`scanl'` forces elements to WHNF when the corresponding `(:)`s are
forced. The rewrite rule for `scanl'` missed forcing the first element,
which is fixed here with a `seq`.
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8a69196e by Rodrigo Mesquita at 2025-07-08T07:39:47-04:00
debugger/rts: Allow toggling step-in per thread
The RTS global flag `rts_stop_next_breakpoint` globally sets the
interpreter to stop at the immediate next breakpoint.
With this commit, single step mode can additionally be set per thread in
the TSO flag (TSO_STOP_NEXT_BREAKPOINT).
Being able to toggle "stop at next breakpoint" per thread is an
important requirement for implementing "stepping out" of a function in a
multi-threaded context.
And, more generally, having a per-thread flag for single-stepping paves the
way for multi-threaded debugging.
That said, when we want to enable "single step" mode for the whole
interpreted program we still want to stop at the immediate next
breakpoint, whichever thread it belongs to.
That's why we also keep the global `rts_stop_next_breakpoint` flag, with
`rts_enableStopNextBreakpointAll` and `rts_disableStopNextBreakpointAll` helpers.
Preparation for #26042
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73d3f864 by Rodrigo Mesquita at 2025-07-08T07:39:47-04:00
docs: Case continuation BCOs
This commit documents a subtle interaction between frames for case BCOs
and their parents frames. Namely, case continuation BCOs may refer to
(non-local) variables that are part of the parent's frame.
The note expanding a bit on these details is called [Case continuation BCOs]
- - - - -
d7aeddcf by Rodrigo Mesquita at 2025-07-08T07:39:47-04:00
debugger: Implement step-out feature
Implements support for stepping-out of a function (aka breaking right after
returning from a function) in the interactive debugger.
It also introduces a GHCi command :stepout to step-out of a function
being debugged in the interpreter. The feature is described as:
Stop at the first breakpoint immediately after returning from the current
function scope.
Known limitations: because a function tail-call does not push a stack
frame, if step-out is used inside of a function that was tail-called,
execution will not be returned to its caller, but rather its caller's
first non-tail caller. On the other hand, it means the debugger
follows the more realistic execution of the program.
In the following example:
.. code-block:: none
f = do
a
b <--- (1) set breakpoint then step in here
c
b = do
...
d <--- (2) step-into this tail call
d = do
...
something <--- (3) step-out here
...
Stepping-out will stop execution at the `c` invokation in `f`, rather than
stopping at `b`.
The key idea is simple: When step-out is enabled, traverse the runtime
stack until a continuation BCO is found -- and enable the breakpoint
heading that BCO explicitly using its tick-index.
The details are specified in `Note [Debugger: Step-out]` in `rts/Interpreter.c`.
Since PUSH_ALTS BCOs (representing case continuations) were never headed
by a breakpoint (unlike the case alternatives they push), we introduced
the BRK_ALTS instruction to allow the debugger to set a case
continuation to stop at the breakpoint heading the alternative that is
taken. This is further described in `Note [Debugger: BRK_ALTS]`.
Fixes #26042
- - - - -
5d9adf51 by Rodrigo Mesquita at 2025-07-08T07:39:47-04:00
debugger: Filter step-out stops by SrcSpan
To implement step-out, the RTS looks for the first continuation frame on
the stack and explicitly enables its entry breakpoint. However, some
continuations will be contained in the function from which step-out was
initiated (trivial example is a case expression).
Similarly to steplocal, we will filter the breakpoints at which the RTS
yields to the debugger based on the SrcSpan. When doing step-out, only
stop if the breakpoint is /not/ contained in the function from which we
initiated it.
This is especially relevant in monadic statements such as IO which is
compiled to a long chain of case expressions.
See Note [Debugger: Filtering step-out stops]
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7677adcc by Cheng Shao at 2025-07-08T07:40:29-04:00
compiler: make ModBreaks serializable
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14f67c6d by Rodrigo Mesquita at 2025-07-08T07:40:29-04:00
refactor: "Inspecting the session" moved from GHC
Moved utilities for inspecting the session from the GHC module to
GHC.Driver.Session.Inspect
Purely a clean up
- - - - -
9d3f484a by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
cleanup: Pass the HUG to readModBreaks, not HscEnv
A minor cleanup. The associated history and setupBreakpoint functions
are changed accordingly.
- - - - -
b595f713 by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
cleanup: Move readModBreaks to GHC.Runtime.Interpreter
With some small docs changes
- - - - -
d223227a by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
cleanup: Move interpreterProfiled to Interp.Types
Moves interpreterProfiled and interpreterDynamic to
GHC.Runtime.Interpreter.Types from GHC.Runtime.Interpreter.
- - - - -
7fdd0a3d by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
cleanup: Don't import GHC in Debugger.Breakpoints
Remove the top-level
import GHC
from GHC.Runtime.Debugger.Breakpoints
This makes the module dependencies more granular and cleans up the
qualified imports from the code.
- - - - -
5e4da31b by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
refactor: Use BreakpointId in Core and Ifaces
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741ac3a8 by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
stg2bc: Derive BcM via ReaderT StateT
A small refactor that simplifies GHC.StgToByteCode by deriving-via the
Monad instances for BcM. This is done along the lines of previous
similar refactors like 72b54c0760bbf85be1f73c1a364d4701e5720465.
- - - - -
0414fcc9 by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
refact: Split InternalModBreaks out of ModBreaks
There are currently two competing ways of referring to a Breakpoint:
1. Using the Tick module + Tick index
2. Using the Info module + Info index
1. The Tick index is allocated during desugaring in `mkModBreaks`. It is
used to refer to a breakpoint associated to a Core Tick. For a given
Tick module, there are N Ticks indexed by Tick index.
2. The Info index is allocated during code generation (in StgToByteCode)
and uniquely identifies the breakpoints at runtime (and is indeed used
to determine which breakpoint was hit at runtime).
Why we need both is described by Note [Breakpoint identifiers].
For every info index we used to keep a `CgBreakInfo`, a datatype containing
information relevant to ByteCode Generation, in `ModBreaks`.
This commit splits out the `IntMap CgBreakInfo` out of `ModBreaks` into
a new datatype `InternalModBreaks`.
- The purpose is to separate the `ModBreaks` datatype, which stores
data associated from tick-level information which is fixed after
desugaring, from the unrelated `IntMap CgBreakInfo` information
accumulated during bytecode generation.
- We move `ModBreaks` to GHC.HsToCore.Breakpoints
The new `InternalModBreaks` simply combines the `IntMap CgBreakInfo`
with `ModBreaks`. After code generation we construct an
`InternalModBreaks` with the `CgBreakInfo`s we accumulated and the
existing `ModBreaks` and store that in the compiled BCO in `bc_breaks`.
- Note that we previously only updated the `modBreaks_breakInfo`
field of `ModBreaks` at this exact location, and then stored the
updated `ModBreaks` in the same `bc_breaks`.
- We put this new datatype in GHC.ByteCode.Breakpoints
The rest of the pipeline for which CgBreakInfo is relevant is
accordingly updated to also use `InternalModBreaks`
- - - - -
2a097955 by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
cleanup: Use BreakpointIds in bytecode gen
Small clean up to use BreakpointId and InternalBreakpointId more
uniformly in bytecode generation rather than using Module + Ix pairs
- - - - -
0515cc2f by Rodrigo Mesquita at 2025-07-08T07:40:30-04:00
ghci: Allocate BreakArrays at link time only
Previously, a BreakArray would be allocated with a slot for every tick
in a module at `mkModBreaks`, in HsToCore. However, this approach has
a few downsides:
- It interleaves interpreter behaviour (allocating arrays for
breakpoints) within the desugarer
- It is inflexible in the sense it is impossible for the bytecode
generator to add "internal" breakpoints that can be triggered at
runtime, because those wouldn't have a source tick. (This is relevant
for our intended implementation plan of step-out in #26042)
- It ties the BreakArray indices to the *tick* indexes, while at runtime
we would rather just have the *info* indexes (currently we have both
because BreakArrays are indexed by the *tick* one).
Paving the way for #26042 and #26064, this commit moves the allocation
of BreakArrays to bytecode-loading time -- akin to what is done for CCS
arrays.
Since a BreakArray is allocated only when bytecode is linked, if a
breakpoint is set (e.g. `:break 10`) before the bytecode is linked,
there will exist no BreakArray to trigger the breakpoint in.
Therefore, the function to allocate break arrays (`allocateBreakArrays`)
is exposed and also used in GHC.Runtime.Eval to allocate a break array
when a breakpoint is set, if it doesn't exist yet (in the linker env).
- - - - -
8016561f by Simon Peyton Jones at 2025-07-08T07:41:13-04:00
Add a test for T26176
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454cd682 by Simon Peyton Jones at 2025-07-08T07:41:13-04:00
Add test for #14010
This test started to work in GHC 9.6 and has worked since.
This MR just adds a regression test
- - - - -
ea2c6673 by Teo Camarasu at 2025-07-08T13:24:43-04:00
Implement user-defined allocation limit handlers
Allocation Limits allow killing a thread if they allocate more than a
user-specified limit.
We extend this feature to allow more versatile behaviour.
- We allow not killing the thread if the limit is exceeded.
- We allow setting a custom handler to be called when the limit is exceeded.
User-specified allocation limit handlers run in a fresh thread and are passed
the ThreadId of the thread that exceeded its limit.
We introduce utility functions for getting and setting the allocation
limits of other threads, so that users can reset the limit of a thread
from a handler. Both of these are somewhat coarse-grained as we are
unaware of the allocations in the current nursery chunk.
We provide several examples of usages in testsuite/tests/rts/T22859.hs
Resolves #22859
- - - - -
03e047f9 by Simon Hengel at 2025-07-08T13:25:25-04:00
Fix typo in using.rst
- - - - -
67957854 by Ben Gamari at 2025-07-09T09:44:44-04:00
compiler: Import AnnotationWrapper from ghc-internal
Since `GHC.Desugar` exported from `base` has been deprecated.
- - - - -
813d99d6 by Ben Gamari at 2025-07-09T09:44:44-04:00
ghc-compact: Eliminate dependency on ghc-prim
- - - - -
0ec952a1 by Ben Gamari at 2025-07-09T09:44:44-04:00
ghc-heap: Eliminate dependency on ghc-prim
- - - - -
480074c3 by Ben Gamari at 2025-07-09T09:44:44-04:00
ghc-heap: Drop redundant import
- - - - -
03455829 by Ben Gamari at 2025-07-09T09:44:45-04:00
ghc-prim: Bump version to 0.13.1
There are no interface changes from 0.13.0 but the implementation now
lives in `ghc-internal`.
- - - - -
d315345a by Ben Gamari at 2025-07-09T09:44:45-04:00
template-haskell: Bump version number to 2.24.0.0
Bumps exceptions submodule.
- - - - -
004c800e by Ben Gamari at 2025-07-09T09:44:45-04:00
Bump GHC version number to 9.14
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eb1a3816 by Ben Gamari at 2025-07-09T09:44:45-04:00
Bump parsec to 3.1.18.0
Bumps parsec submodule.
- - - - -
86f83296 by Ben Gamari at 2025-07-09T09:44:45-04:00
unix: Bump to 2.8.7.0
Bumps unix submodule.
- - - - -
89e13998 by Ben Gamari at 2025-07-09T09:44:45-04:00
binary: Bump to 0.8.9.3
Bumps binary submodule.
- - - - -
55fff191 by Ben Gamari at 2025-07-09T09:44:45-04:00
Win32: Bump to 2.14.2.0
Bumps Win32 submodule.
- - - - -
7dafa40c by Ben Gamari at 2025-07-09T09:44:45-04:00
base: Bump version to 4.22.0
Bumps various submodules.
- - - - -
ef03d8b8 by Rodrigo Mesquita at 2025-07-09T09:45:28-04:00
base: Export displayExceptionWithInfo
This function should be exposed from base following CLC#285
Approved change in CLC#344
Fixes #26058
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01d3154e by Wen Kokke at 2025-07-10T17:06:36+01:00
Fix documentation for HEAP_PROF_SAMPLE_STRING
- - - - -
ac259c48 by Wen Kokke at 2025-07-10T17:06:38+01:00
Fix documentation for HEAP_PROF_SAMPLE_COST_CENTRE
- - - - -
2b4db9ba by Pi Delport at 2025-07-11T16:40:52-04:00
(Applicative docs typo: missing "one")
- - - - -
f707bab4 by Andreas Klebinger at 2025-07-12T14:56:16+01:00
Specialise: Improve specialisation by refactoring interestingDict
This MR addresses #26051, which concerns missed type-class specialisation.
The main payload of the MR is to completely refactor the key function
`interestingDict` in GHC.Core.Opt.Specialise
The main change is that we now also look at the structure of the
dictionary we consider specializing on, rather than only the type.
See the big `Note [Interesting dictionary arguments]`
- - - - -
ca7a9d42 by Simon Peyton Jones at 2025-07-12T14:56:16+01:00
Treat tuple dictionaries uniformly; don't unbox them
See `Note [Do not unbox class dictionaries]` in DmdAnal.hs,
sep (DNB1).
This MR reverses the plan in #23398, which suggested a special case to
unbox tuple dictionaries in worker/wrapper. But:
- This was the cause of a pile of complexity in the specialiser (#26158)
- Even with that complexity, specialision was still bad, very bad
See https://gitlab.haskell.org/ghc/ghc/-/issues/19747#note_626297
And it's entirely unnecessary! Specialision works fine without
unboxing tuple dictionaries.
- - - - -
be7296c9 by Andreas Klebinger at 2025-07-12T14:56:16+01:00
Remove complex special case from the type-class specialiser
There was a pretty tricky special case in Specialise which is no
longer necessary.
* Historical Note [Floating dictionaries out of cases]
* #26158
* #19747 https://gitlab.haskell.org/ghc/ghc/-/issues/19747#note_626297
This MR removes it. Hooray.
- - - - -
4acf3a86 by Ben Gamari at 2025-07-15T05:46:32-04:00
configure: bump version to 9.15
- - - - -
45efaf71 by Teo Camarasu at 2025-07-15T05:47:13-04:00
rts/nonmovingGC: remove n_free
We remove the nonmovingHeap.n_free variable.
We wanted this to track the length of nonmovingHeap.free.
But this isn't possible to do atomically.
When this isn't accurate we can get a segfault by going past the end of
the list.
Instead, we just count the length of the list when we grab it in
nonmovingPruneFreeSegment.
Resolves #26186
- - - - -
c635f164 by Ben Gamari at 2025-07-15T14:05:54-04:00
configure: Drop probing of ld.gold
As noted in #25716, `gold` has been dropped from binutils-2.44.
Fixes #25716.
Metric Increase:
size_hello_artifact_gzip
size_hello_unicode_gzip
ghc_prim_so
- - - - -
637bb538 by Ben Gamari at 2025-07-15T14:05:55-04:00
testsuite/recomp015: Ignore stderr
This is necessary since ld.bfd complains
that we don't have a .note.GNU-stack section,
potentially resulting in an executable stack.
- - - - -
d3cd4ec8 by Wen Kokke at 2025-07-15T14:06:39-04:00
Fix documentation for heap profile ID
- - - - -
73082769 by Ben Gamari at 2025-07-15T16:56:38-04:00
Bump win32-tarballs to v0.9
- - - - -
3b63b254 by Ben Gamari at 2025-07-15T16:56:39-04:00
rts/LoadArchive: Handle null terminated string tables
As of `llvm-ar` now emits filename tables terminated with null
characters instead of the usual POSIX `/\n` sequence.
Fixes #26150.
- - - - -
195f6527 by Tamar Christina at 2025-07-15T16:56:39-04:00
rts: rename label so name doesn't conflict with param
- - - - -
63373b95 by Tamar Christina at 2025-07-15T16:56:39-04:00
rts: Handle API set symbol versioning conflicts
- - - - -
48e9aa3e by Tamar Christina at 2025-07-15T16:56:39-04:00
rts: Mark API set symbols as HIDDEN and correct symbol type
- - - - -
959e827a by Tamar Christina at 2025-07-15T16:56:39-04:00
rts: Implement WEAK EXTERNAL undef redirection by target symbol name
- - - - -
65f19293 by Ben Gamari at 2025-07-15T16:56:39-04:00
rts/LoadArchive: Handle string table entries terminated with /
llvm-ar appears to terminate string table entries with `/\n` [1]. This
matters in the case of thin archives, since the filename is used. In the
past this worked since `llvm-ar` would produce archives with "small"
filenames when possible. However, now it appears to always use the
string table.
[1] https://github.com/llvm/llvm-project/blob/bfb686bb5ba503e9386dc899e1ebbe248…
- - - - -
9cbb3ef5 by Ben Gamari at 2025-07-15T16:56:39-04:00
testsuite: Mark T12497 as fixed
Thanks to the LLVM toolchain update.
Closes #22694.
- - - - -
2854407e by Ben Gamari at 2025-07-15T16:56:39-04:00
testsuite: Accept new output of T11223_link_order_a_b_2_fail on Windows
The archive member number changed due to the fact that llvm-ar now uses a
string table.
- - - - -
28439593 by Ben Gamari at 2025-07-15T16:56:39-04:00
rts/linker/PEi386: Implement IMAGE_REL_AMD64_SECREL
This appears to now be used by libc++ as distributed by msys2.
- - - - -
2b053755 by Tamar Christina at 2025-07-15T16:56:39-04:00
rts: Cleanup merge resolution residue in lookupSymbolInDLL_PEi386 and make safe without dependent
- - - - -
e8acd2e7 by Wen Kokke at 2025-07-16T08:37:04-04:00
Remove the `profile_id` parameter from various RTS functions.
Various RTS functions took a `profile_id` parameter, intended to be used to
distinguish parallel heap profile breakdowns (e.g., `-hT` and `-hi`). However,
this feature was never implemented and the `profile_id` parameter was set to 0
throughout the RTS. This commit removes the parameter but leaves the hardcoded
profile ID in the functions that emit the encoded eventlog events as to not
change the protocol.
The affected functions are `traceHeapProfBegin`, `postHeapProfBegin`,
`traceHeapProfSampleString`, `postHeapProfSampleString`,
`traceHeapProfSampleCostCentre`, and `postHeapProfSampleCostCentre`.
- - - - -
76d392a2 by Wen Kokke at 2025-07-16T08:37:04-04:00
Make `traceHeapProfBegin` an init event.
- - - - -
bbaa44a7 by Peng Fan at 2025-07-16T16:50:42-04:00
NCG/LA64: Support finer-grained DBAR hints
For LA664 and newer uarchs, they have made finer granularity hints
available:
Bit4: ordering or completion (0: completion, 1: ordering)
Bit3: barrier for previous read (0: true, 1: false)
Bit2: barrier for previous write (0: true, 1: false)
Bit1: barrier for succeeding read (0: true, 1: false)
Bit0: barrier for succeeding write (0: true, 1: false)
And not affect the existing models because other hints are treated
as 'dbar 0' there.
- - - - -
7da86e16 by Andreas Klebinger at 2025-07-16T16:51:25-04:00
Disable -fprof-late-overloaded-calls for join points.
Currently GHC considers cost centres as destructive to
join contexts. Or in other words this is not considered valid:
join f x = ...
in
... -> scc<tick> jmp
This makes the functionality of `-fprof-late-overloaded-calls` not feasible
for join points in general. We used to try to work around this by putting the
ticks on the rhs of the join point rather than around the jump. However beyond
the loss of accuracy this was broken for recursive join points as we ended up
with something like:
rec-join f x = scc<tick> ... jmp f x
Which similarly is not valid as the tick once again destroys the tail call.
One might think we could limit ourselves to non-recursive tail calls and do
something clever like:
join f x = scc<tick> ...
in ... jmp f x
And sometimes this works! But sometimes the full rhs would look something like:
join g x = ....
join f x = scc<tick> ... -> jmp g x
Which, would again no longer be valid. I believe in the long run we can make
cost centre ticks non-destructive to join points. Or we could keep track of
where we are/are not allowed to insert a cost centre. But in the short term I will
simply disable the annotation of join calls under this flag.
- - - - -
7ee22fd5 by ARATA Mizuki at 2025-07-17T06:05:30-04:00
x86 NCG: Better lowering for shuffleFloatX4# and shuffleDoubleX2#
The new implementation
* make use of specialized instructions like (V)UNPCK{L,H}{PS,PD}, and
* do not require -mavx.
Close #26096
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
c6cd2da1 by Jappie Klooster at 2025-07-17T06:06:20-04:00
Update interact docs to explain about buffering
We need to tell the user to set to the
appropriate buffer format.
Otherwise, this function may get randomly stuck,
or just behave confusingly.
issue: https://gitlab.haskell.org/ghc/ghc/-/issues/26131
NB, I'm running this with cabal *NOT* ghci. ghci messes with buffering anyway.
```haskell
interaction :: String -> String
interaction "jappie" = "hi"
interaction "jakob" = "hello"
interaction x = "unkown input: " <> x
main :: IO ()
main = interact interaction
```
so in my input (prefixed by `>`) I get:
```
> jappie
unkown input: jappie
```
we confirmed later this was due to lack of \n matching.
Anyway movnig on to more unexpected stuff:
```haskell
main :: IO ()
main = do
interact (concatMap interaction . lines)
```
get's stuck forever.
actually `^D` (ctrl+d) unstucks it and runs all input as expected.
for example you can get:
```
> sdfkds
> fakdsf
unkown input: sdfkdsunkown input: fakdsf
```
This program works!
```haskell
interaction :: String -> String
interaction "jappie" = "hi \n"
interaction "jakob" = "hello \n"
interaction x = "unkown input: " <> x <> "\n"
main :: IO ()
main = do
interact (concatMap interaction . lines)
```
the reason is that linebuffering is set for both in and output by default.
so lines eats the input lines, and all the \n postfixes make sure the buffer
is put out.
- - - - -
9fa590a6 by Zubin Duggal at 2025-07-17T06:07:03-04:00
fetch_gitlab: Ensure we copy users_guide.pdf and Haddock.pdf to the release docs directory
Fixes #24093
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cc650b4b by Andrew Lelechenko at 2025-07-17T12:30:24-04:00
Add Data.List.NonEmpty.mapMaybe
As per https://github.com/haskell/core-libraries-committee/issues/337
- - - - -
360fa82c by Duncan Coutts at 2025-07-17T12:31:14-04:00
base: Deprecate GHC.Weak.Finalize.runFinalizerBatch
https://github.com/haskell/core-libraries-committee/issues/342
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f4e8466c by Alan Zimmerman at 2025-07-17T12:31:55-04:00
EPA: Update exact printing based on GHC 9.14 tests
As a result of migrating the GHC ghc-9.14 branch tests to
ghc-exactprint in
https://github.com/alanz/ghc-exactprint/tree/ghc-9.14, a couple of
discrepancies were picked up
- The opening paren for a DefaultDecl was printed in the wrong place
- The import declaration level specifiers were not printed.
This commit adds those fixes, and some tests for them.
The tests brought to light that the ImportDecl ppr instance had not
been updated for level specifiers, so it updates that too.
- - - - -
8b731e3c by Matthew Pickering at 2025-07-21T13:36:43-04:00
level imports: Fix infinite loop with cyclic module imports
I didn't anticipate that downsweep would run before we checked for
cyclic imports. Therefore we need to use the reachability function which
handles cyclic graphs.
Fixes #26087
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d751a9f1 by Pierre Thierry at 2025-07-21T13:37:28-04:00
Fix documentation about deriving from generics
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f8d9d016 by Andrew Lelechenko at 2025-07-22T21:13:28-04:00
Fix issues with toRational for types capable to represent infinite and not-a-number values
This commit fixes all of the following pitfalls:
> toRational (read "Infinity" :: Double)
179769313486231590772930519078902473361797697894230657273430081157732675805500963132708477322407536021120113879871393357658789768814416622492847430639474124377767893424865485276302219601246094119453082952085005768838150682342462881473913110540827237163350510684586298239947245938479716304835356329624224137216 % 1
> toRational (read "NaN" :: Double)
269653970229347386159395778618353710042696546841345985910145121736599013708251444699062715983611304031680170819807090036488184653221624933739271145959211186566651840137298227914453329401869141179179624428127508653257226023513694322210869665811240855745025766026879447359920868907719574457253034494436336205824 % 1
> realToFrac (read "NaN" :: Double) -- With -O0
Infinity
> realToFrac (read "NaN" :: Double) -- With -O1
NaN
> realToFrac (read "NaN" :: Double) :: CDouble
Infinity
> realToFrac (read "NaN" :: CDouble) :: Double
Infinity
Implements https://github.com/haskell/core-libraries-committee/issues/338
- - - - -
5dabc718 by Zubin Duggal at 2025-07-22T21:14:10-04:00
haddock: Don't warn about missing link destinations for derived names.
Fixes #26114
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9c3a0937 by Matthew Pickering at 2025-07-22T21:14:52-04:00
template haskell: use a precise condition when implicitly lifting
Implicit lifting corrects a level error by replacing references to `x`
with `$(lift x)`, therefore you can use a level `n` binding at level `n
+ 1`, if it can be lifted.
Therefore, we now have a precise check that the use level is 1 more than
the bind level.
Before this bug was not observable as you only had 0 and 1 contexts but
it is easily evident when using explicit level imports.
Fixes #26088
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5144b22f by Andreas Klebinger at 2025-07-22T21:15:34-04:00
Add since tag and more docs for do-clever-arg-eta-expansion
Fixes #26113
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c865623b by Andreas Klebinger at 2025-07-22T21:15:34-04:00
Add since tag for -fexpose-overloaded-unfoldings
Fixes #26112
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49a44ab7 by Simon Hengel at 2025-07-23T17:59:55+07:00
Refactor GHC.Driver.Errors.printMessages
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84711c39 by Simon Hengel at 2025-07-23T18:27:34+07:00
Respect `-fdiagnostics-as-json` for error messages from pre-processors
(fixes #25480)
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d046b5ab by Simon Hengel at 2025-07-24T06:12:05-04:00
Include the rendered message in -fdiagnostics-as-json output
This implements #26173.
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d2b89603 by Ben Gamari at 2025-07-24T06:12:47-04:00
rts/Interpreter: Factor out ctoi tuple info tables into data
Instead of a massive case let's put this into data which we can reuse
elsewhere.
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4bc78496 by Sebastian Graf at 2025-07-24T16:19:34-04:00
CprAnal: Detect recursive newtypes (#25944)
While `cprTransformDataConWork` handles recursive data con workers, it
did not detect the case when a newtype is responsible for the recursion.
This is now detected in the `Cast` case of `cprAnal`.
The same reproducer made it clear that `isRecDataCon` lacked congruent
handling for `AppTy` and `CastTy`, now fixed.
Furthermore, the new repro case T25944 triggered this bug via an
infinite loop in `cprFix`, caused by the infelicity in `isRecDataCon`.
While it should be much less likely to trigger such an infinite loop now
that `isRecDataCon` has been fixed, I made sure to abort the loop after
10 iterations and emitting a warning instead.
Fixes #25944.
- - - - -
0a583689 by Sylvain Henry at 2025-07-24T16:20:26-04:00
STM: don't create a transaction in the rhs of catchRetry# (#26028)
We don't need to create a transaction for the rhs of (catchRetry#)
because contrary to the lhs we don't need to abort it on retry. Moreover
it is particularly harmful if we have code such as (#26028):
let cN = readTVar vN >> retry
tree = c1 `orElse` (c2 `orElse` (c3 `orElse` ...))
atomically tree
Because it will stack transactions for the rhss and the read-sets of all
the transactions will be iteratively merged in O(n^2) after the
execution of the most nested retry.
- - - - -
a49eca26 by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Renaming around predicate types
.. we were (as it turned out) abstracting over
type-class selectors in SPECIALISATION rules!
Wibble isEqPred
- - - - -
f80375dd by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Refactor of Specialise.hs
This patch just tidies up `specHeader` a bit, removing one
of its many results, and adding some comments.
No change in behaviour.
Also add a few more `HasDebugCallStack` contexts.
- - - - -
1bd12371 by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Improve treatment of SPECIALISE pragmas -- again!
This MR does another major refactor of the way that SPECIALISE
pragmas work, to fix #26115, #26116, #26117.
* We now /always/ solve forall-constraints in an all-or-nothing way.
See Note [Solving a Wanted forall-constraint] in GHC.Tc.Solver.Solve
This means we might have unsolved quantified constraints, which need
to be reported. See `inert_insts` in `getUnsolvedInerts`.
* I refactored the short-cut solver for type classes to work by
recursively calling the solver rather than by having a little baby
solver that kept being not clever enough.
See Note [Shortcut solving] in GHC.Tc.Solver.Dict
* I totally rewrote the desugaring of SPECIALISE pragmas, again.
The new story is in Note [Desugaring new-form SPECIALISE pragmas]
in GHC.HsToCore.Binds
Both old-form and new-form SPECIALISE pragmas now route through the same
function `dsSpec_help`. The tricky function `decomposeRuleLhs` is now used only
for user-written RULES, not for SPECIALISE pragmas.
* I improved `solveOneFromTheOther` to account for rewriter sets. Previously
it would solve a non-rewritten dict from a rewritten one. For equalities
we were already dealing with this, in
Some incidental refactoring
* A small refactor: `ebv_tcvs` in `EvBindsBar` now has a list of coercions, rather
than a set of tyvars. We just delay taking the free vars.
* GHC.Core.FVs.exprFVs now returns /all/ free vars.
Use `exprLocalFVs` for Local vars.
Reason: I wanted another variant for /evidence/ variables.
* Ues `EvId` in preference to `EvVar`. (Evidence variables are always Ids.)
Rename `isEvVar` to `isEvId`.
* I moved `inert_safehask` out of `InertCans` and into `InertSet` where it
more properly belongs.
Compiler-perf changes:
* There was a palpable bug (#26117) which this MR fixes in
newWantedEvVar, which bypassed all the subtle overlapping-Given
and shortcutting logic. (See the new `newWantedEvVar`.) Fixing this
but leads to extra dictionary bindings; they are optimised away quickly
but they made CoOpt_Read allocate 3.6% more.
* Hpapily T15164 improves.
* The net compiler-allocation change is 0.0%
Metric Decrease:
T15164
Metric Increase:
CoOpt_Read
T12425
- - - - -
953fd8f1 by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Solve forall-constraints immediately, or not at all
This MR refactors the constraint solver to solve forall-constraints immediately,
rather than emitting an implication constraint to be solved later.
The most immediate motivation was that when solving quantified constraints
in SPECIALISE pragmas, we really really don't want to leave behind half-
solved implications. Also it's in tune with the approach of the new
short-cut solver, which recursively invokes the solver.
It /also/ saves quite a bit of plumbing; e.g
- The `wl_implics` field of `WorkList` is gone,
- The types of `solveSimpleWanteds` and friends are simplified.
- An EvFun contains binding, rather than an EvBindsVar ref-cell that
will in the future contain bindings. That makes `evVarsOfTerm`
simpler. Much nicer.
It also improves error messages a bit.
All described in Note [Solving a Wanted forall-constraint] in
GHC.Tc.Solver.Solve.
One tiresome point: in the tricky case of `inferConstraintsCoerceBased`
we make a forall-constraint. This we /do/ want to partially solve, so
we can infer a suitable context. (I'd be quite happy to force the user to
write a context, bt I don't want to change behavior.) So we want to generate
an /implication/ constraint in `emitPredSpecConstraints` rather than a
/forall-constraint/ as we were doing before. Discussed in (WFA3) of
the above Note.
Incidental refactoring
* `GHC.Tc.Deriv.Infer.inferConstraints` was consulting the state monad for
the DerivEnv that the caller had just consulted. Nicer to pass it as an
argument I think, so I have done that. No change in behaviour.
- - - - -
6921ab42 by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Remove duplicated code in Ast.hs for evTermFreeVars
This is just a tidy up.
- - - - -
1165f587 by Simon Peyton Jones at 2025-07-25T09:49:58+01:00
Small tc-tracing changes only
- - - - -
0776ffe0 by Simon Hengel at 2025-07-26T04:54:20-04:00
Respect `-fdiagnostics-as-json` for core diagnostics (see #24113)
- - - - -
cc1116e0 by Andrew Lelechenko at 2025-07-26T04:55:01-04:00
docs: add since pragma to Data.List.NonEmpty.mapMaybe
- - - - -
ee2dc248 by Simon Hengel at 2025-07-31T06:25:35-04:00
Update comments on `OptKind` to reflect the code reality
- - - - -
b029633a by Wen Kokke at 2025-07-31T06:26:21-04:00
rts: Disable --eventlog-flush-interval unless compiled with -threaded.
This commit fixes issue #26222:
Using --eventlog-flush-interval with the non-threaded RTS leads to eventlog corruption.
https://gitlab.haskell.org/ghc/ghc/-/issues/26222
This commit makes three changes when code is compiled against the non-threaded RTS:
1. It disables the --eventlog-flush-interval flag.
2. It disables the documentation for the --eventlog-flush-interval flag.
3. It disables the relevant state from RtsConfig and code from Timer.
4. It updates the entry for --eventlog-flush-interval in the users guide.
- - - - -
31159f1d by Wen Kokke at 2025-07-31T06:26:21-04:00
rts: Split T20006 into tests with and without -threaded
- - - - -
618687ef by Simon Hengel at 2025-07-31T06:27:03-04:00
docs/users_guide/win32-dlls.rst: Remove references to `readline`
- - - - -
083e40f1 by Rodrigo Mesquita at 2025-08-01T04:38:23-04:00
debugger: Uniquely identify breakpoints by internal id
Since b85b11994e0130ff2401dd4bbdf52330e0bcf776 (support inlining
breakpoints), a breakpoint has been identified at runtime by *two* pairs
of <module,index>.
- The first, aka a 'BreakpointId', uniquely identifies a breakpoint in
the source of a module by using the Tick index. A Tick index can index
into ModBreaks.modBreaks_xxx to fetch source-level information about
where that tick originated.
- When a user specifies e.g. a line breakpoint using :break, we'll reverse
engineer what a Tick index for that line
- We update the `BreakArray` of that module (got from the
LoaderState) at that tick index to `breakOn`.
- A BCO we can stop at is headed by a BRK_FUN instruction. This
instruction stores in an operand the `tick index` it is associated
to. We look it up in the associated `BreakArray` (also an operand)
and check wheter it was set to `breakOn`.
- The second, aka the `ibi_info_mod` + `ibi_info_ix` of the
`InternalBreakpointId`, uniquely index into the `imodBreaks_breakInfo`
-- the information we gathered during code generation about the
existing breakpoint *ocurrences*.
- Note that with optimisation there may be many occurrences of the
same source-tick-breakpoint across different modules. The
`ibi_info_ix` is unique per occurrence, but the `bi_tick_ix` may be
shared. See Note [Breakpoint identifiers] about this.
- Note that besides the tick ids, info ids are also stored in
`BRK_FUN` so the break handler can refer to the associated
`CgBreakInfo`.
In light of that, the driving changes come from the desire to have the
info_id uniquely identify the breakpoint at runtime, and the source tick
id being derived from it:
- An InternalBreakpointId should uniquely identify a breakpoint just
from the code-generation identifiers of `ibi_info_ix` and `ibi_info_mod`.
So we drop `ibi_tick_mod` and `ibi_tick_ix`.
- A BRK_FUN instruction need only record the "internal breakpoint id",
not the tick-level id.
So we drop the tick mod and tick index operands.
- A BreakArray should be indexed by InternalBreakpointId rather than
BreakpointId
That means we need to do some more work when setting a breakpoint.
Specifically, we need to figure out the internal ids (occurrences of a
breakpoint) from the source-level BreakpointId we want to set the
breakpoint at (recall :break refers to breaks at the source level).
Besides this change being an improvement to the handling of breakpoints
(it's clearer to have a single unique identifier than two competing
ones), it unlocks the possibility of generating "internal" breakpoints
during Cg (needed for #26042).
It should also be easier to introduce multi-threaded-aware `BreakArrays`
following this change (needed for #26064).
Se also the new Note [ModBreaks vs InternalModBreaks]
On i386-linux:
-------------------------
Metric Decrease:
interpreter_steplocal
-------------------------
- - - - -
bf03bbaa by Simon Hengel at 2025-08-01T04:39:05-04:00
Don't use MCDiagnostic for `ghcExit`
This changes the error message of `ghcExit` from
```
<no location info>: error:
Compilation had errors
```
to
```
Compilation had errors
```
- - - - -
a889ec75 by Simon Hengel at 2025-08-01T04:39:05-04:00
Respect `-fdiagnostics-as-json` for driver diagnostics (see #24113)
- - - - -
81577fe7 by Ben Gamari at 2025-08-02T04:29:39-04:00
configure: Allow override of CrossCompiling
As noted in #26236, the current inference logic is a bit simplistic. In
particular, there are many cases (e.g. building for a new libc) where
the target and host triples may differ yet we are still able to run the
produced artifacts as native code.
Closes #26236.
- - - - -
01136779 by Andreas Klebinger at 2025-08-02T04:30:20-04:00
rts: Support COFF BigObj files in archives.
- - - - -
1f9e4f54 by Stephen Morgan at 2025-08-03T15:14:08+10:00
refactor: Modify Data.List.sortOn to use (>) instead of compare. (#26184)
This lets a more efficient (>) operation be used if one exists.
This is technically a breaking change for malformed Ord instances, where
x > y is not equivalent to compare x y == GT.
Discussed by the CLC in issue #332: https://github.com/haskell/core-libraries-committee/issues/332
- - - - -
4f6bc9cf by fendor at 2025-08-04T17:50:06-04:00
Revert "base: Expose Backtraces constructor and fields"
This reverts commit 17db44c5b32fff82ea988fa4f1a233d1a27bdf57.
- - - - -
bcdec657 by Zubin Duggal at 2025-08-05T10:37:29+05:30
compiler: Export a version of `newNameCache` that is not prone to footguns.
`newNameCache` must be initialized with both a non-"reserved" unique tag, as well
as a list of known key names. Failing to do so results in hard to debug unique conflicts.
It is difficult for API users to tell which unique tags are safe to use. So instead of leaving
this up to the user to decide, we now export a version of `newNameCache` which uses a guaranteed
non-reserved unique tag. In fact, this is now the way the unique tag is initialized for all invocations
of the compiler.
The original version of `newNameCache` is now exported as `newNameCache'` for advanced users.
We also deprecate `initNameCache` as it is also prone to footguns and is completely subsumed in
functionality by `newNameCache` and `newNameCache'`.
Fixes #26135 and #26055
- - - - -
57d3b4a8 by Andrew Lelechenko at 2025-08-05T18:36:31-04:00
hadrian: bump Stackage snapshot to LTS 24.2 / GHC 9.10.2
In line with #25693 we should use GHC 9.10 as a boot compiler,
while Hadrian stack.yaml was stuck on GHC 9.6.
- - - - -
c2a78cea by Peng Fan at 2025-08-05T18:37:27-04:00
NCG/LA64: implement atomic write with finer-grained DBAR hints
Signed-off-by: Peng Fan <fanpeng(a)loongson.cn>
- - - - -
95231c8e by Teo Camarasu at 2025-08-06T08:35:58-04:00
CODEOWNERS: add CLC as codeowner of base
We also remove hvr, since I think he is no longer active
- - - - -
77df0ded by Andrew Lelechenko at 2025-08-06T08:36:39-04:00
Bump submodule text to 2.1.3
- - - - -
8af260d0 by Nikolaos Chatzikonstantinou at 2025-08-06T08:37:23-04:00
docs: fix internal import in getopt examples
This external-facing doc example shouldn't mention GHC internals when
using 'fromMaybe'.
- - - - -
69cc16ca by Marc Scholten at 2025-08-06T15:51:28-04:00
README: Add note on ghc.nix
- - - - -
93a2f450 by Daniel Díaz at 2025-08-06T15:52:14-04:00
Link to the "Strict Bindings" docs from the linear types docs
Strict Bidings are relevant for the kinds of multiplicity annotations
linear lets support.
- - - - -
246b7853 by Matthew Pickering at 2025-08-07T06:58:30-04:00
level imports: Check the level of exported identifiers
The level imports specification states that exported identifiers have to
be at level 0. This patch adds the requird level checks that all
explicitly mentioned identifiers occur at level 0.
For implicit export specifications (T(..) and module B), only level 0
identifiers are selected for re-export.
ghc-proposal: https://github.com/ghc-proposals/ghc-proposals/pull/705
Fixes #26090
- - - - -
358bc4fc by fendor at 2025-08-07T06:59:12-04:00
Bump GHC on darwin CI to 9.10.1
- - - - -
1903ae35 by Matthew Pickering at 2025-08-07T12:21:10+01:00
ipe: Place strings and metadata into specific .ipe section
By placing the .ipe metadata into a specific section it can be stripped
from the final binary if desired.
```
objcopy --remove-section .ipe <binary>
upx <binary>
```
Towards #21766
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c80dd91c by Matthew Pickering at 2025-08-07T12:22:42+01:00
ipe: Place magic word at the start of entries in the .ipe section
The magic word "IPE\nIPE\n" is placed at the start of .ipe sections,
then if the section is stripped, we can check whether the section starts
with the magic word or not to determine whether there is metadata
present or not.
Towards #21766
- - - - -
cab42666 by Matthew Pickering at 2025-08-07T12:22:42+01:00
ipe: Use stable IDs for IPE entries
IPEs have historically been indexed and reported by their address.
This makes it impossible to compare profiles between runs, since the
addresses may change (due to ASLR) and also makes it tricky to separate
out the IPE map from the binary.
This small patch adds a stable identifier for each IPE entry.
The stable identifier is a single 64 bit word. The high-bits are a
per-module identifier and the low bits identify which entry in each
module.
1. When a node is added into the IPE buffer it is assigned a unique
identifier from an incrementing global counter.
2. Each entry already has an index by it's position in the
`IpeBufferListNode`.
The two are combined together by the `IPE_ENTRY_KEY` macro.
Info table profiling uses the stable identifier rather than the address
of the info table.
The benefits of this change are:
* Profiles from different runs can be easily compared
* The metadata can be extracted from the binary (via the eventlog for
example) and then stripped from the executable.
Fixes #21766
- - - - -
2860a9a5 by Simon Peyton Jones at 2025-08-07T20:29:18-04:00
In TcSShortCut, typechecker plugins should get empty Givens
Solving in TcShortCut mode means /ignoring the Givens/. So we
should not pass them to typechecker plugins!
Fixes #26258.
This is a fixup to the earlier MR:
commit 1bd12371feacc52394a0e660ef9349f9e8ee1c06
Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com>
Date: Mon Jul 21 10:04:49 2025 +0100
Improve treatment of SPECIALISE pragmas -- again!
- - - - -
2157db2d by sterni at 2025-08-08T15:32:39-04:00
hadrian: enable terminfo if --with-curses-* flags are given
The GHC make build system used to support WITH_TERMINFO in ghc.mk which
allowed controlling whether to build GHC with terminfo or not. hadrian
has replaced this with a system where this is effectively controlled by
the cross-compiling setting (the default WITH_TERMINFO value was bassed
on CrossCompiling, iirc).
This behavior is undesireable in some cases and there is not really a
good way to work around it. Especially for downstream packagers,
modifying this via UserSettings is not really feasible since such a
source file has to be kept in sync with Settings/Default.hs manually
since it can't import Settings.Default or any predefined Flavour
definitions.
To avoid having to add a new setting to cfg/system.config and/or a new
configure flag (though I'm happy to implement both if required), I've
chosen to take --with-curses-* being set explicitly as an indication
that the user wants to have terminfo enabled. This would work for
Nixpkgs which sets these flags [1] as well as haskell.nix [2] (which
goes to some extreme measures [3] [4] to force terminfo in all scenarios).
In general, I'm an advocate for making the GHC build be the same for
native and cross insofar it is possible since it makes packaging GHC and
Haskell related things while still supporting cross much less
compilicated. A more minimal GHC with reduced dependencies should
probably be a specific flavor, not the default.
Partially addresses #26288 by forcing terminfo to be built if the user
explicitly passes configure flags related to it. However, it isn't built
by default when cross-compiling yet nor is there an explicit way to
control the package being built.
[1]: https://github.com/NixOS/nixpkgs/blob/3a7266fcefcb9ce353df49ba3f292d0644376…
[2]: https://github.com/input-output-hk/haskell.nix/blob/6eaafcdf04bab7be745d1aa…
[3]: https://github.com/input-output-hk/haskell.nix/blob/6eaafcdf04bab7be745d1aa…
[4]: https://github.com/input-output-hk/haskell.nix/blob/6eaafcdf04bab7be745d1aa…
- - - - -
b3c31488 by David Feuer at 2025-08-08T15:33:21-04:00
Add default QuasiQuoters
Add `defaultQuasiQuoter` and `namedDefaultQuasiQuoter` to make it easier
to write `QuasiQuoters` that give helpful error messages when they're
used in inappropriate contexts.
Closes #24434.
- - - - -
03555ed8 by Sylvain Henry at 2025-08-10T22:20:57-04:00
Handle non-fractional CmmFloats in Cmm's CBE (#26229)
Since f8d9d016305be355f518c141f6c6d4826f2de9a2, toRational for Float and
Double converts float's infinity and NaN into Rational's infinity and
NaN (respectively 1%0 and 0%0).
Cmm CommonBlockEliminator hashing function needs to take these values
into account as they can appear as literals now. See added testcase.
- - - - -
6c956af3 by J. Ryan Stinnett at 2025-08-10T22:21:42-04:00
Fix extensions list in `DoAndIfThenElse` docs
- - - - -
6dc420b1 by J. Ryan Stinnett at 2025-08-10T22:21:42-04:00
Document status of `RelaxedPolyRec` extension
This adds a brief extension page explaining the status of the
`RelaxedPolyRec` extension. The behaviour of this mode is already
explained elsewhere, so this page is mainly for completeness so that
various lists of extensions have somewhere to point to for this flag.
Fixes #18630
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18036d52 by Simon Peyton Jones at 2025-08-11T11:31:20-04:00
Take more care in zonkEqTypes on AppTy/AppTy
This patch fixes #26256.
See Note [zonkEqTypes and the PKTI] in GHC.Tc.Solver.Equality
- - - - -
c8d76a29 by Zubin Duggal at 2025-08-11T11:32:02-04:00
ci: upgrade bootstrap compiler on windows to 9.10.1
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34fc50c1 by Ben Gamari at 2025-08-11T13:36:25-04:00
Kill IOPort#
This type is unnecessary, having been superceded by `MVar` and a rework
of WinIO's blocking logic.
See #20947.
See https://github.com/haskell/core-libraries-committee/issues/213.
- - - - -
56b32c5a by sheaf at 2025-08-12T10:00:19-04:00
Improve deep subsumption
This commit improves the DeepSubsumption sub-typing implementation
in GHC.Tc.Utils.Unify.tc_sub_type_deep by being less eager to fall back
to unification.
For example, we now are properly able to prove the subtyping relationship
((∀ a. a->a) -> Int) -> Bool <= β[tau] Bool
for an unfilled metavariable β. In this case (with an AppTy on the right),
we used to fall back to unification. No longer: now, given that the LHS
is a FunTy and that the RHS is a deep rho type (does not need any instantiation),
we try to make the RHS into a FunTy, viz.
β := (->) γ
We can then continue using covariance & contravariance of the function
arrow, which allows us to prove the subtyping relationship, instead of
trying to unify which would cause us to error out with:
Couldn't match expected type ‘β’ with actual type ‘(->) ((∀ a. a -> a) -> Int)
See Note [FunTy vs non-FunTy case in tc_sub_type_deep] in GHC.Tc.Utils.Unify.
The other main improvement in this patch concerns type inference.
The main subsumption logic happens (before & after this patch) in
GHC.Tc.Gen.App.checkResultTy. However, before this patch, all of the
DeepSubsumption logic only kicked in in 'check' mode, not in 'infer' mode.
This patch adds deep instantiation in the 'infer' mode of checkResultTy
when we are doing deep subsumption, which allows us to accept programs
such as:
f :: Int -> (forall a. a->a)
g :: Int -> Bool -> Bool
test1 b =
case b of
True -> f
False -> g
test2 b =
case b of
True -> g
False -> f
See Note [Deeply instantiate in checkResultTy when inferring].
Finally, we add representation-polymorphism checks to ensure that the
lambda abstractions we introduce when doing subsumption obey the
representation polymorphism invariants of Note [Representation polymorphism invariants]
in GHC.Core. See Note [FunTy vs FunTy case in tc_sub_type_deep].
This is accompanied by a courtesy change to `(<.>) :: HsWrapper -> HsWrapper -> HsWrapper`,
adding the equation:
WpCast c1 <.> WpCast c2 = WpCast (c1 `mkTransCo` c2)
This is useful because mkWpFun does not introduce an eta-expansion when
both of the argument & result wrappers are casts; so this change allows
us to avoid introducing lambda abstractions when casts suffice.
Fixes #26225
- - - - -
d175aff8 by Sylvain Henry at 2025-08-12T10:01:31-04:00
Add regression test for #18619
- - - - -
a3983a26 by Sylvain Henry at 2025-08-12T10:02:20-04:00
RTS: remove some TSAN annotations (#20464)
Use RELAXED_LOAD_ALWAYS macro instead.
- - - - -
0434af81 by Ben Gamari at 2025-08-12T10:03:02-04:00
Bump time submodule to 1.15
Also required bumps of Cabal, directory, and hpc.
- - - - -
62899117 by Florian Ragwitz at 2025-08-13T21:01:34-04:00
Extend record-selector usage ticking to all binds using a record field
This extends the previous handling of ticking for RecordWildCards and
NamedFieldPuns to all var bindings that involve record selectors.
Note that certain patterns such as `Foo{foo = 42}` will currently not tick the
`foo` selector, as ticking is triggered by `HsVar`s.
Closes #26191.
- - - - -
b37b3af7 by Florian Ragwitz at 2025-08-13T21:01:34-04:00
Add release notes for 9.16.1 and move description of latest HPC changes there.
- - - - -
a5e4b7d9 by Ben Gamari at 2025-08-13T21:02:18-04:00
rts: Clarify rationale for undefined atomic wrappers
Since c06e3f46d24ef69f3a3d794f5f604cb8c2a40cbc the RTS has declared
various atomic operation wrappers defined by ghc-internal as undefined.
While the rationale for this isn't clear from the commit message, I
believe that this is necessary due to the unregisterised backend.
Specifically, the code generator will reference these symbols when
compiling RTS Cmm sources.
- - - - -
50842f83 by Andreas Klebinger at 2025-08-13T21:03:01-04:00
Make unexpected LLVM versions a warning rather than an error.
Typically a newer LLVM version *will* work so erroring out if
a user uses a newer LLVM version is too aggressive.
Fixes #25915
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c91e2650 by fendor at 2025-08-13T21:03:43-04:00
Store `StackTrace` and `StackSnapshot` in `Backtraces`
Instead of decoding the stack traces when collecting the `Backtraces`,
defer this decoding until actually showing the `Backtraces`.
This allows users to customise how `Backtraces` are displayed by
using a custom implementation of `displayExceptionWithInfo`, overwriting
the default implementation for `Backtraces` (`displayBacktraces`).
- - - - -
dee28cdd by fendor at 2025-08-13T21:03:43-04:00
Allow users to customise the collection of exception annotations
Add a global `CollectExceptionAnnotationMechanism` which determines how
`ExceptionAnnotation`s are collected upon throwing an `Exception`.
This API is exposed via `ghc-experimental`.
By overriding how we collect `Backtraces`, we can control how the
`Backtraces` are displayed to the user by newtyping `Backtraces` and
giving a different instance for `ExceptionAnnotation`.
A concrete use-case for this feature is allowing us to experiment with
alternative stack decoders, without having to modify `base`, which take
additional information from the stack frames.
This commit does not modify how `Backtraces` are currently
collected or displayed.
- - - - -
66024722 by fendor at 2025-08-13T21:03:43-04:00
Expose Backtraces internals from ghc-experimental
Additionally, expose the same API `base:Control.Exception.Backtrace`
to make it easier to use as a drop-in replacement.
- - - - -
a766286f by Reed Mullanix at 2025-08-13T21:04:36-04:00
ghc-internal: Fix naturalAndNot for NB/NS case
When the first argument to `naturalAndNot` is larger than a `Word` and the second is `Word`-sized, `naturalAndNot` will truncate the
result:
```
>>> naturalAndNot ((2 ^ 65) .|. (2 ^ 3)) (2 ^ 3)
0
```
In contrast, `naturalAndNot` does not truncate when both arguments are larger than a `Word`, so this appears to be a bug.
Luckily, the fix is pretty easy: we just need to call `bigNatAndNotWord#` instead of truncating.
Fixes #26230
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3506fa7d by Simon Hengel at 2025-08-13T21:05:18-04:00
Report -pgms as a deprecated flag
(instead of reporting an unspecific warning)
Before:
on the commandline: warning:
Object splitting was removed in GHC 8.8
After:
on the commandline: warning: [GHC-53692] [-Wdeprecated-flags]
-pgms is deprecated: Object splitting was removed in GHC 8.8
- - - - -
51c701fe by Zubin Duggal at 2025-08-13T21:06:00-04:00
testsuite: Be more permissive when filtering out GNU_PROPERTY_TYPE linker warnings
The warning text is slightly different with ld.bfd.
Fixes #26249
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dfe6f464 by Simon Hengel at 2025-08-13T21:06:43-04:00
Refactoring: Don't misuse `MCDiagnostic` for lint messages
`MCDiagnostic` is meant to be used for compiler diagnostics.
Any code that creates `MCDiagnostic` directly, without going through
`GHC.Driver.Errors.printMessage`, side steps `-fdiagnostics-as-json`
(see e.g. !14475, !14492 !14548).
To avoid this in the future I want to control more narrowly who creates
`MCDiagnostic` (see #24113).
Some parts of the compiler use `MCDiagnostic` purely for formatting
purposes, without creating any real compiler diagnostics. This change
introduces a helper function, `formatDiagnostic`, that can be used in
such cases instead of constructing `MCDiagnostic`.
- - - - -
a8b2fbae by Teo Camarasu at 2025-08-13T21:07:24-04:00
rts: ensure MessageBlackHole.link is always a valid closure
We turn a MessageBlackHole into an StgInd in wakeBlockingQueue().
Therefore it's important that the link field, which becomes the
indirection field, always points to a valid closure.
It's unclear whether it's currently possible for the previous behaviour
to lead to a crash, but it's good to be consistent about this invariant nonetheless.
Co-authored-by: Andreas Klebinger <klebinger.andreas(a)gmx.at>
- - - - -
4021181e by Teo Camarasu at 2025-08-13T21:07:24-04:00
rts: spin if we see a WHITEHOLE in messageBlackHole
When a BLACKHOLE gets cancelled in raiseAsync, we indirect to a THUNK.
GC can then shortcut this, replacing our BLACKHOLE with a fresh THUNK.
This THUNK is not guaranteed to have a valid indirectee field.
If at the same time, a message intended for the previous BLACKHOLE is
processed and concurrently we BLACKHOLE the THUNK, thus temporarily
turning it into a WHITEHOLE, we can get a segfault, since we look at the
undefined indirectee field of the THUNK
The fix is simple: spin if we see a WHITEHOLE, and it will soon be
replaced with a valid BLACKHOLE.
Resolves #26205
- - - - -
1107af89 by Oleg Grenrus at 2025-08-13T21:08:06-04:00
Allow defining HasField instances for naughty fields
Resolves #26295
... as HasField solver doesn't solve for fields with "naughty"
selectors, we could as well allow defining HasField instances for these
fields.
- - - - -
020e7587 by Sylvain Henry at 2025-08-13T21:09:00-04:00
Fix Data.List unqualified import warning
- - - - -
fd811ded by Simon Peyton Jones at 2025-08-14T17:56:47-04:00
Make injecting implicit bindings into its own pass
Previously we were injecting "impliicit bindings" (data constructor
worker and wrappers etc)
- both at the end of CoreTidy,
- and at the start of CorePrep
This is unpleasant and confusing. This patch puts it it its own pass,
addImplicitBinds, which runs between the two.
The function `GHC.CoreToStg.AddImplicitBinds.addImplicitBinds` now takes /all/
TyCons, not just the ones for algebraic data types. That change ripples
through to
- corePrepPgm
- doCodeGen
- byteCodeGen
All take [TyCon] which includes all TyCons
- - - - -
9bd7fcc5 by Simon Peyton Jones at 2025-08-14T17:56:47-04:00
Implement unary classes
The big change is described exhaustively in
Note [Unary class magic] in GHC.Core.TyCon
Other changes
* We never unbox class dictionaries in worker/wrapper. This has been true for some
time now, but the logic is now centralised in functions in
GHC.Core.Opt.WorkWrap.Utils, namely `canUnboxTyCon`, and `canUnboxArg`
See Note [Do not unbox class dictionaries] in GHC.Core.Opt.WorkWrap.Utils.
* Refactored the `notWorthFloating` logic in GHc.Core.Opt.SetLevels.
I can't remember if I actually changed any behaviour here, but if so it's
only in a corner cases.
* Fixed a bug in `GHC.Core.TyCon.isEnumerationTyCon`, which was wrongly returning
True for (##).
* Remove redundant Role argument to `liftCoSubstWithEx`. It was always
Representational.
* I refactored evidence generation in the constraint solver:
* Made GHC.Tc.Types.Evidence contain better abstactions for evidence
generation.
* I deleted the file `GHC.Tc.Types.EvTerm` and merged its (small) contents
elsewhere. It wasn't paying its way.
* Made evidence for implicit parameters go via a proper abstraction.
* Fix inlineBoringOk; see (IB6) in Note [inlineBoringOk]
This fixes a slowdown in `countdownEffectfulDynLocal`
in the `effectful` library.
Smaller things
* Rename `isDataTyCon` to `isBoxedDataTyCon`.
* GHC.Core.Corecion.liftCoSubstWithEx was only called with Representational role,
so I baked that into the function and removed the argument.
* Get rid of `GHC.Core.TyCon.tyConSingleAlgDataCon_maybe` in favour of calling
`not isNewTyCon` at the call sites; more explicit.
* Refatored `GHC.Core.TyCon.isInjectiveTyCon`; but I don't think I changed its
behaviour
* Moved `decomposeIPPred` to GHC.Core.Predicate
Compile time performance changes:
geo. mean +0.1%
minimum -6.8%
maximum +14.4%
The +14% one is in T21839c, where it seems that a bit more inlining
is taking place. That seems acceptable; and the average change is small
Metric Decrease:
LargeRecord
T12227
T12707
T16577
T21839r
T5642
Metric Increase:
T15164
T21839c
T3294
T5321FD
T5321Fun
WWRec
- - - - -
b4075d71 by Simon Peyton Jones at 2025-08-14T17:56:47-04:00
Slight improvement to pre/postInlineUnconditionally
Avoids an extra simplifier iteration
- - - - -
9e443596 by Simon Peyton Jones at 2025-08-14T17:56:47-04:00
Fix a long-standing assertion error in normSplitTyConApp_maybe
- - - - -
91310ad0 by Simon Peyton Jones at 2025-08-14T17:56:47-04:00
Add comment to coercion optimiser
- - - - -
5b841d82 by Teo Camarasu at 2025-08-14T17:57:56-04:00
template-haskell: move some identifiers from ghc-internal to template-haskell
These identifiers are not used internally by the compiler. Therefore we
have no reason for them to be in ghc-internal.
By moving them to template-haskell, we benefit from it being easier to
change them and we avoid having to build them in stage0.
Resolves #26048
- - - - -
33e2c7e5 by Teo Camarasu at 2025-08-14T17:57:56-04:00
template-haskell: transfer $infix note to public module
This Haddock note should be in the public facing module
- - - - -
2a411fc4 by Sylvain Henry at 2025-08-14T17:59:09-04:00
JS: export HEAP8 symbol (#26290)
Newer Emscripten requires this.
- - - - -
248f78ca by Ben Gamari at 2025-08-14T17:59:51-04:00
users-guide: Drop the THREAD_RUNNABLE event
As of f361281c89fbce42865d8b8b27b0957205366186 it is no longer emitted.
- - - - -
706d33e3 by Recursion Ninja at 2025-08-15T04:12:12-04:00
Resolving issues #20645 and #26109
Correctly sign extending and casting smaller bit width types for LLVM operations:
- bitReverse8#
- bitReverse16#
- bitReverse32#
- byteSwap16#
- byteSwap32#
- pdep8#
- pdep16#
- pext8#
- pext16#
- - - - -
1cdc6f46 by Cheng Shao at 2025-08-15T04:12:56-04:00
hadrian: enforce have_llvm=False for wasm32/js
This patch fixes hadrian to always pass have_llvm=False to the
testsuite driver for wasm32/js targets. These targets don't really
support the LLVM backend, and the optllvm test way doesn't work. We
used to special-case wasm32/js to avoid auto-adding optllvm way in
testsuite/config/ghc, but this is still problematic if someone writes
a new LLVM-related test and uses something like when(have_llvm(),
extra_ways(["optllvm"])). So better just enforce have_llvm=False for
these targets here.
- - - - -
ca03226d by Ben Gamari at 2025-08-18T13:43:20+00:00
configure: Allow use of LLVM 20
- - - - -
783cd7d6 by Cheng Shao at 2025-08-18T20:13:14-04:00
compiler: use `UniqMap` instead of `Map` for `BCEnv` in bytecode compiler
The bytecode compiler maintains a `BCEnv` which was previously `Map Id
StackDepth`. Given `Id` is `Uniquable`, we might as well use `UniqMap`
here as a more efficient data structure, hence this patch.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
58e46da9 by fendor at 2025-08-18T20:13:56-04:00
rts: Strip lower three bits when hashing Word instead of lower eight bits
- - - - -
45dbfa23 by Cheng Shao at 2025-08-18T20:14:37-04:00
libffi: update to 3.5.2
Bumps libffi submodule.
- - - - -
54be78ef by Ben Gamari at 2025-08-19T16:28:05-04:00
testsuite: Fix T20006b
This test is supposed to fail for non-threaded ways yet it
was previously marked as only failing in `normal`.
Fix this.
- - - - -
f4bac607 by Simon Peyton Jones at 2025-08-19T16:28:47-04:00
Take yet more care with reporting redundant constraints
This small patch fixes #25992, which relates to reporting redundant
constraints on default-method declarations.
See (TRC5) in Note [Tracking redundant constraints]
- - - - -
ab130fec by fendor at 2025-08-19T16:29:29-04:00
Bump dependencies of hadrian-bootstrap-gen to use GHC 9.6.7
- - - - -
6d02ac6f by fendor at 2025-08-19T16:29:29-04:00
Bump required GHC version for test-bootstrap jobs to 9.10.1
Include test-bootstrap job for GHC 9.12.2.
Update hadrian bootstrap plans use GHC 9.10 and 9.12
Remove older GHC bootstrap configurations.
We require at least GHC 9.10.1 to build GHC.
Adds plans for:
* 9.10.1
* 9.10.2
* 9.12.1
* 9.12.2
- - - - -
9e857171 by Brandon Chinn at 2025-08-20T11:47:46-04:00
Don't warn unused-imports with used generated imports
Fixes #21730
* The old notion of "implicit" import has been renamed to "generated". See Note [Generated imports] in GHC.Hs.ImpExp.
* ImportMap now keeps track of generated and user-written imports separately. This avoids the fake SrcSpan we used to give the implicit Prelude import, and the hack that went with it.
* -ddump-minimal-imports now considers generated imports (but still only
warns on + prints user-written imports)
* bestImport considers generated imports to take priority over user-written imports.
- - - - -
9fb3bad4 by Ben Gamari at 2025-08-20T11:48:31-04:00
mailmap: Use ben(a)well-typed.com more liberally
Nearly all of this work was done while working for Well-Typed.
- - - - -
774fec37 by Ben Gamari at 2025-08-20T11:49:15-04:00
Add primop to annotate the call stack with arbitrary data
We introduce a new primop `annotateStack#` which allows us to push
arbitrary data onto the call-stack.
This allows us to extract the data later when decoding the stack, for
example when an exception is thrown, showing more information to the
user without having to annotate the full call-stack with `HasCallStack`
constraints.
A new stack frame value is introduced `AnnFrame`, which consists of
nothing but a generic payload.
The primop has a small wrapper API that allows users to annotate their
call-stack in programs.
There is a pure API and an IO-based one. The former is a little bit
dubious, as it affects the evaluation of a program, so use with care.
The latter is "safe", as it doesn't change the evaluation of the
program.
The stack annotation mechanism is similarly implemented to the
`ExceptionAnnotation` and `Exception`, there is a typeclass to indicate
something can be pushed onto the call-stack and all values are wrapped
in the existential `SomeStackAnnotation`, which recover the type of the
annotation payload.
There is currently no builtin way to show the stack annotations when
`Backtraces` are displayed (i.e., when showing stack traces to the user),
which we will address in a follow-up MR.
-------------------------
Metric Increase:
ghc_experimental_so
-------------------------
We increase the size of the package, so this is not unreasonable.
Co-Authored-By: fendor <fendor(a)posteo.de>
Co-Authored-By: Ben Gamari <bgamari.foss(a)gmail.com>
- - - - -
fdfa3892 by Ben Gamari at 2025-08-20T11:49:57-04:00
testsuite: Add regression test for #24606
- - - - -
39b2e382 by Cheng Shao at 2025-08-20T11:50:40-04:00
compiler: only use `Name` instead of `Id` in `SptEntry`
As a part of #26298, this patch refactors `SptEntry` to only carry a
`Name` instead of `Id`: we do not care about extra information like
caffyness or type at all in any static pointer related codegen logic.
This is necessary to make `SptEntry` serializable, as a part of the
grand plan of serializable bytecode.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
276f8ea8 by Vekhir -- at 2025-08-20T11:51:35-04:00
Bump Cabal dependency
- - - - -
0b9c7437 by Zubin Duggal at 2025-08-20T11:52:18-04:00
ci: Teach ci.sh to fetch FreeBSD artifacts from ghcup unofficial bindists and bootstrap compiler on FreeBSD to 9.10.1
Also refactor fetch_ghc logic in ci.sh, renaming the GHC_VERSION enviorment configuration variable to FETCH_GHC_VERSION,
making it clear that it is intended for use on platforms like Windows and FreeBSD where we don't want to use the GHC
excecutable from the platform environment and instead need to download and install GHC-$FETCH_GHC_VERSION from a release
bindist.
Fixes #26296
- - - - -
b2914797 by Cheng Shao at 2025-08-20T11:53:00-04:00
driver: use UniqSet for hiddenModules in DynFlags/FinderOpts
This patch replaces Set ModuleName with UniqSet ModuleName in
DynFlags.hiddenModules and FinderOpts.finder_hiddenModules for
improved efficiency.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
0335d899 by Cheng Shao at 2025-08-20T11:53:00-04:00
driver: use UniqMap ModuleName in the finder
This patch replaces Map ModuleName with UniqMap ModuleName in the
finder for improved efficiency.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
91f4faaa by Cheng Shao at 2025-08-20T11:53:43-04:00
configure: check python3 version and require minimal 3.7
Since !9515, the testsuite driver requires python3 version to be at
least 3.7, though this has never been checked by configure logic. This
patch implements the version check. Fixes #23234.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
df4ee9b4 by Cheng Shao at 2025-08-20T11:54:25-04:00
compiler: use zero cost coerce in GHC.CmmToAsm.CFG.loopInfo
This patch refactors GHC.CmmToAsm.CFG.loopInfo to use zero cost coerce
and thus addresses the TODO. For coerce to work, constructors of
Label/LabelMap/LabelSet from GHC.Cmm.Dataflow.Label are exposed,
though I believe it's a worthy tradeoff to avoid unnecessary runtime
cost without using unsafeCoerce, since the latter could be a landmine
for future refactoring.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
ccda188d by Simon Peyton Jones at 2025-08-20T11:55:07-04:00
Start with empty inerts in shortcut solving
When short-cut solving we were starting with an inert set that had
unsolved Wanteds. This caused an infinite loop (#26314), because a
typechecker plugin kept being given that unsolved Wanted.
It's better just to start with an empty inert set
- - - - -
c8882ed7 by Ben Gamari at 2025-08-20T11:55:49-04:00
configure: Bump minimal bootstrap GHC version to 9.8
- - - - -
f0a19d74 by fendor at 2025-08-20T19:55:00-04:00
Remove deprecated functions from the ghci package
- - - - -
ebeb991b by fendor at 2025-08-20T19:55:00-04:00
base: Remove unstable heap representation details from GHC.Exts
- - - - -
e368e247 by Rodrigo Mesquita at 2025-08-20T19:55:42-04:00
bytecode: Use 32bits for breakpoint index
Fixes #26325
- - - - -
42724462 by Simon Hengel at 2025-08-21T17:52:11-04:00
Serialize wired-in names as external names when creating HIE files
Note that the domain of de-serialized names stays the same.
Specifically, for known-key names, before `lookupKnownKeyName` was used,
while now this is handled by `lookupOrigNameCache` which captures the
same range provided that the OrigNameCache has been initialized with
`knownKeyNames` (which is the case by default).
(fixes #26238)
- - - - -
6a43f8ec by Cheng Shao at 2025-08-21T17:52:52-04:00
compiler: fix closure C type in SPT init code
This patch fixes the closure C type in SPT init code to StgClosure,
instead of the previously incorrect StgPtr. Having an incorrect C type
makes SPT init code not compatible with other foreign stub generation
logic, which may also emit their own extern declarations for the same
closure symbols and thus will clash with the incorrect prototypes in
SPT init code.
- - - - -
5b5d9d47 by Ben Gamari at 2025-08-25T14:29:35-04:00
Revert "STM: don't create a transaction in the rhs of catchRetry# (#26028)"
This reverts commit 0a5836891ca29836a24c306d2a364c2e4b5377fd
- - - - -
10f06163 by Cheng Shao at 2025-08-25T14:30:16-04:00
wasm: ensure setKeepCAFs() is called in ghci
This patch is a critical bugfix for #26106, see comment and linked
issue for details.
- - - - -
bedc1004 by Cheng Shao at 2025-08-26T09:31:18-04:00
compiler: use zero cost coerce in hoopl setElems/mapToList
This patch is a follow-up of !14680 and changes setElems/mapToList in
GHC/Cmm/Dataflow/Label to use coerce instead of mapping mkHooplLabel
over the keys.
- - - - -
13250d97 by Ryan Scott at 2025-08-26T09:31:59-04:00
Reject infix promoted data constructors without DataKinds
In the rename, make sure to apply the same `DataKinds` checks for both
`HsTyVar` (for prefix promoted data constructors) and `HsOpTy` (for infix
promoted data constructors) alike.
Fixes #26318.
- - - - -
37655c46 by Teo Camarasu at 2025-08-26T15:24:51-04:00
tests: disable T22859 under LLVM
This test was failing under the LLVM backend since the allocations
differ from the NCG.
Resolves #26282
- - - - -
2cbba9d6 by Teo Camarasu at 2025-08-26T15:25:33-04:00
base-exports: update version numbers
As the version of the compiler has been bumped, a lot of the embedded
version numbers will need to be updated if we ever run this test with
`--test-accept` so let's just update them now, and keep future diffs
clean.
- - - - -
f9f2ffcf by Alexandre Esteves at 2025-08-27T07:19:14-04:00
Import new name for 'utimbuf' on windows to fix #26337
Fixes an `-Wincompatible-pointer-types` instance that turns into an error on
recent toolchains and surfaced as such on nixpkgs when doing linux->ucrt cross.
This long-standing warning has been present at least since 9.4:
```
C:\GitLabRunner\builds\0\1709189\tmp\ghc16652_0\ghc_4.c:26:115: error:
warning: incompatible pointer types passing 'struct utimbuf *' to parameter of type 'struct _utimbuf *' [-Wincompatible-pointer-types]
|
26 | HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
| ^
HsInt32 ghczuwrapperZC9ZCbaseZCSystemziPosixziInternalsZCzuutime(char* a1, struct utimbuf* a2) {return _utime(a1, a2);}
^~
C:\GitLabRunner\builds\0\1709189\_build\stage0\lib\..\..\mingw\x86_64-w64-mingw32\include\sys\utime.h:109:72: error:
note: passing argument to parameter '_Utimbuf' here
|
109 | __CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
| ^
__CRT_INLINE int __cdecl _utime(const char *_Filename,struct _utimbuf *_Utimbuf) {
```
- - - - -
ae89f000 by Hassan Al-Awwadi at 2025-08-27T07:19:56-04:00
Adds the fucnction addDependentDirectory to Q, resolving issue #26148.
This function adds a new directory to the list of things a module depends upon. That means that when the contents of the directory change, the recompilation checker will notice this and the module will be recompiled. Documentation has also been added for addDependentFunction and addDependentDirectory in the user guide.
- - - - -
00478944 by Simon Peyton Jones at 2025-08-27T16:48:30+01:00
Comments only
- - - - -
a7884589 by Simon Peyton Jones at 2025-08-28T11:08:23+01:00
Type-family occurs check in unification
The occurs check in `GHC.Core.Unify.uVarOrFam` was inadequate in dealing
with type families.
Better now. See Note [The occurs check in the Core unifier].
As I did this I realised that the whole apartness thing is trickier than I
thought: see the new Note [Shortcomings of the apartness test]
- - - - -
8adfc222 by sheaf at 2025-08-28T19:47:17-04:00
Fix orientation in HsWrapper composition (<.>)
This commit fixes the order in which WpCast HsWrappers are composed,
fixing a bug introduced in commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1.
Fixes #26350
- - - - -
eb2ab1e2 by Oleg Grenrus at 2025-08-29T11:00:53-04:00
Generalise thNameToGhcName by adding HasHscEnv
There were multiple single monad-specific `getHscEnv` across codebase.
HasHscEnv is modelled on HasDynFlags.
My first idea was to simply add thNameToGhcNameHsc and
thNameToGhcNameTc, but those would been exactly the same
as thNameToGhcName already.
Also add an usage example to thNameToGhcName and mention that it's
recommended way of looking up names in GHC plugins
- - - - -
2d575a7f by fendor at 2025-08-29T11:01:36-04:00
configure: Bump minimal bootstrap GHC version to 9.10
- - - - -
716274a5 by Simon Peyton Jones at 2025-08-29T17:27:12-04:00
Fix deep subsumption again
This commit fixed #26255:
commit 56b32c5a2d5d7cad89a12f4d74dc940e086069d1
Author: sheaf <sam.derbyshire(a)gmail.com>
Date: Mon Aug 11 15:50:47 2025 +0200
Improve deep subsumption
This commit improves the DeepSubsumption sub-typing implementation
in GHC.Tc.Utils.Unify.tc_sub_type_deep by being less eager to fall back
to unification.
But alas it still wasn't quite right for view patterns: #26331
This MR does a generalisation to fix it. A bit of a sledgehammer to crack
a nut, but nice.
* Add a field `ir_inst :: InferInstFlag` to `InferResult`, where
```
data InferInstFlag = IIF_Sigma | IIF_ShallowRho | IIF_DeepRho
```
* The flag says exactly how much `fillInferResult` should instantiate
before filling the hole.
* We can also use this to replace the previous very ad-hoc `tcInferSigma`
that was used to implement GHCi's `:type` command.
- - - - -
27206c5e by sheaf at 2025-08-29T17:28:14-04:00
Back-compat for TH SpecialiseP data-con of Pragma
This commit improves the backwards-compatibility story for the
SpecialiseP constructor of the Template Haskell 'Pragma' datatype.
Instead of keeping the constructor but deprecating it, this commit makes
it into a bundled pattern synonym of the Pragma datatype. We no longer
deprecate it; it's useful for handling old-form specialise pragmas.
- - - - -
26dbcf61 by fendor at 2025-08-30T05:10:08-04:00
Move stack decoding logic from ghc-heap to ghc-internal
The stack decoding logic in `ghc-heap` is more sophisticated than the one
currently employed in `CloneStack`. We want to use the stack decoding
implementation from `ghc-heap` in `base`.
We cannot simply depend on `ghc-heap` in `base` due do bootstrapping
issues.
Thus, we move the code that is necessary to implement stack decoding to
`ghc-internal`. This is the right location, as we don't want to add a
new API to `base`.
Moving the stack decoding logic and re-exposing it in ghc-heap is
insufficient, though, as we have a dependency cycle between.
* ghc-heap depends on stage1:ghc-internal
* stage0:ghc depends on stage0:ghc-heap
To fix this, we remove ghc-heap from the set of `stage0` dependencies.
This is not entirely straight-forward, as a couple of boot dependencies,
such as `ghci` depend on `ghc-heap`.
Luckily, the boot compiler of GHC is now >=9.10, so we can migrate `ghci`
to use `ghc-internal` instead of `ghc-heap`, which already exports the
relevant modules.
However, we cannot 100% remove ghc's dependency on `ghc-heap`, since
when we compile `stage0:ghc`, `stage1:ghc-internal` is not yet
available.
Thus, when we compile with the boot-compiler, we still depend on an
older version of `ghc-heap`, and only use the modules from `ghc-internal`,
if the `ghc-internal` version is recent enough.
-------------------------
Metric Increase:
T24602_perf_size
T25046_perf_size_gzip
T25046_perf_size_unicode
T25046_perf_size_unicode_gzip
size_hello_artifact
size_hello_artifact_gzip
size_hello_unicode
size_hello_unicode_gzip
-------------------------
These metric increases are unfortunate, they are most likely caused by
the larger (literally in terms of lines of code) stack decoder implementation
that are now linked into hello-word binaries.
On linux, it is almost a 10% increase, which is considerable.
- - - - -
bd80bb70 by fendor at 2025-08-30T05:10:08-04:00
Implement `decode` in terms of `decodeStackWithIpe`
Uses the more efficient stack decoder implementation.
- - - - -
24441165 by fendor at 2025-08-30T05:10:08-04:00
Remove stg_decodeStackzh
- - - - -
fb9cc882 by Simon Peyton Jones at 2025-08-30T05:10:51-04:00
Fix a long standing bug in the coercion optimiser
We were mis-optimising ForAllCo, leading to #26345
Part of the poblem was the tricky tower of abstractions leading to
the dreadful
GHC.Core.TyCo.Subst.substForAllCoTyVarBndrUsing
This function was serving two masters: regular substitution, but also
coercion optimsation. So tricky was it that it did so wrong.
In this MR I locate all the fancy footwork for coercion optimisation
in GHC.Core.Coercion.Opt, where it belongs. That leaves substitution
free to be much simpler.
- - - - -
6c78de2d by Sylvain Henry at 2025-09-01T08:46:19-04:00
Driver: substitute virtual Prim module in --make mode too
When we build ghc-internal with --make (e.g. with cabal-install), we
need to be careful to substitute the virtual interface file for
GHC.Internal.Prim:
- after code generation (we generate code for an empty module, so we get
an empty interface)
- when we try to reload its .hi file
- - - - -
26e0db16 by fendor at 2025-09-01T08:47:01-04:00
Expose Stack Annotation frames in IPE backtraces by default
When decoding the Haskell-native call stack and displaying the IPE information
for the stack frames, we print the `StackAnnotation` of the `AnnFrame` by default.
This means, when an exception is thrown, any intermediate stack annotations will
be displayed in the `IPE Backtrace`.
Example backtrace:
```
Exception: ghc-internal:GHC.Internal.Exception.ErrorCall:
Oh no!
IPE backtrace:
annotateCallStackIO, called at app/Main.hs:48:10 in backtrace-0.1.0.0-inplace-server:Main
annotateCallStackIO, called at app/Main.hs:46:13 in backtrace-0.1.0.0-inplace-server:Main
Main.handler (app/Main.hs:(46,1)-(49,30))
Main.liftIO (src/Servant/Server/Internal/Handler.hs:30:36-42)
Servant.Server.Internal.Delayed.runHandler' (src/Servant/Server/Internal/Handler.hs:27:31-41)
Control.Monad.Trans.Resource.runResourceT (./Control/Monad/Trans/Resource.hs:(192,14)-(197,18))
Network.Wai.Handler.Warp.HTTP1.processRequest (./Network/Wai/Handler/Warp/HTTP1.hs:195:20-22)
Network.Wai.Handler.Warp.HTTP1.processRequest (./Network/Wai/Handler/Warp/HTTP1.hs:(195,5)-(203,31))
Network.Wai.Handler.Warp.HTTP1.http1server.loop (./Network/Wai/Handler/Warp/HTTP1.hs:(141,9)-(157,42))
HasCallStack backtrace:
error, called at app/Main.hs:48:32 in backtrace-0.1.0.0-inplace-server:Main
```
The first two entries have been added by `annotateCallStackIO`, defined in `annotateCallStackIO`.
- - - - -
a1567efd by Sylvain Henry at 2025-09-01T23:01:35-04:00
RTS: rely less on Hadrian for flag setting (#25843)
Hadrian used to pass -Dfoo command-line flags directly to build the rts.
We can replace most of these flags with CPP based on cabal flags.
It makes building boot libraries with cabal-install simpler (cf #25843).
- - - - -
ca5b0283 by Sergey Vinokurov at 2025-09-01T23:02:23-04:00
Remove unnecessary irrefutable patterns from Bifunctor instances for tuples
Implementation of https://github.com/haskell/core-libraries-committee/issues/339
Metric Decrease:
mhu-perf
- - - - -
2da84b7a by sheaf at 2025-09-01T23:03:23-04:00
Only use active rules when simplifying rule RHSs
When we are simplifying the RHS of a rule, we make sure to only apply
rewrites from rules that are active throughout the original rule's
range of active phases.
For example, if a rule is always active, we only fire rules that are
themselves always active when simplifying the RHS. Ditto for inline
activations.
This is achieved by setting the simplifier phase to a range of phases,
using the new SimplPhaseRange constructor. Then:
1. When simplifying the RHS of a rule, or of a stable unfolding,
we set the simplifier phase to a range of phases, computed from
the activation of the RULE/unfolding activation, using the
function 'phaseFromActivation'.
The details are explained in Note [What is active in the RHS of a RULE?]
in GHC.Core.Opt.Simplify.Utils.
2. The activation check for other rules and inlinings is then:
does the activation of the other rule/inlining cover the whole
phase range set in sm_phase? This continues to use the 'isActive'
function, which now accounts for phase ranges.
On the way, this commit also moves the exact-print SourceText annotation
from the Activation datatype to the ActivationAnn type. This keeps the
main Activation datatype free of any extra cruft.
Fixes #26323
- - - - -
79816cc4 by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
cleanup: Move dehydrateCgBreakInfo to Stg2Bc
This no longer has anything to do with Core.
- - - - -
53da94ff by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
rts/Disassembler: Fix spacing of BRK_FUN
- - - - -
08c0cf85 by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
debugger: Fix bciPtr in Step-out
We need to use `BCO_NEXT` to move bciPtr to ix=1, because ix=0 points to
the instruction itself!
I do not understand how this didn't crash before.
- - - - -
e7e021fa by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
debugger: Allow BRK_FUNs to head case continuation BCOs
When we start executing a BCO, we may want to yield to the scheduler:
this may be triggered by a heap/stack check, context switch, or a
breakpoint. To yield, we need to put the stack in a state such that
when execution is resumed we are back to where we yielded from.
Previously, a BKR_FUN could only head a function BCO because we only
knew how to construct a valid stack for yielding from one -- simply add
`apply_interp_info` + the BCO to resume executing. This is valid because
the stack at the start of run_BCO is headed by that BCO's arguments.
However, in case continuation BCOs (as per Note [Case continuation BCOs]),
we couldn't easily reconstruct a valid stack that could be resumed
because we dropped too soon the stack frames regarding the value
returned (stg_ret) and received (stg_ctoi) by that continuation.
This is especially tricky because of the variable type and size return
frames (e.g. pointer ret_p/ctoi_R1p vs a tuple ret_t/ctoi_t2).
The trick to being able to yield from a BRK_FUN at the start of a case
cont BCO is to stop removing the ret frame headers eagerly and instead
keep them until the BCO starts executing. The new layout at the start of
a case cont. BCO is described by the new Note [Stack layout when entering run_BCO].
Now, we keep the ret_* and ctoi_* frames when entering run_BCO.
A BRK_FUN is then executed if found, and the stack is yielded as-is with
the preserved ret and ctoi frames.
Then, a case cont BCO's instructions always SLIDE off the headers of the
ret and ctoi frames, in StgToByteCode.doCase, turning a stack like
| .... |
+---------------+
| fv2 |
+---------------+
| fv1 |
+---------------+
| BCO |
+---------------+
| stg_ctoi_ret_ |
+---------------+
| retval |
+---------------+
| stg_ret_..... |
+---------------+
into
| .... |
+---------------+
| fv2 |
+---------------+
| fv1 |
+---------------+
| retval |
+---------------+
for the remainder of the BCO.
Moreover, this more uniform approach of keeping the ret and ctoi frames
means we need less ad-hoc logic concerning the variable size of
ret_tuple vs ret_p/np frames in the code generator and interpreter:
Always keep the return to cont. stack intact at the start of run_BCO,
and the statically generated instructions will take care of adjusting
it.
Unlocks BRK_FUNs at the start of case cont. BCOs which will enable a
better user-facing step-out (#26042) which is free of the bugs the
current BRK_ALTS implementation suffers from (namely, using BRK_FUN
rather than BRK_ALTS in a case cont. means we'll never accidentally end
up in a breakpoint "deeper" than the continuation, because we stop at
the case cont itself rather than on the first breakpoint we evaluate
after it).
- - - - -
ade3c1e6 by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
BRK_FUN with InternalBreakLocs for code-generation time breakpoints
At the start of a case continuation BCO, place a BRK_FUN.
This BRK_FUN uses the new "internal breakpoint location" -- allowing us
to come up with a valid source location for this breakpoint that is not associated with a source-level tick.
For case continuation BCOs, we use the last tick seen before it as the
source location. The reasoning is described in Note [Debugger: Stepout internal break locs].
Note how T26042c, which was broken because it displayed the incorrect
behavior of the previous step out when we'd end up at a deeper level
than the one from which we initiated step-out, is now fixed.
As of this commit, BRK_ALTS is now dead code and is thus dropped.
Note [Debugger: Stepout internal break locs]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Step-out tells the interpreter to run until the current function
returns to where it was called from, and stop there.
This is achieved by enabling the BRK_FUN found on the first RET_BCO
frame on the stack (See [Note Debugger: Step-out]).
Case continuation BCOs (which select an alternative branch) must
therefore be headed by a BRK_FUN. An example:
f x = case g x of <--- end up here
1 -> ...
2 -> ...
g y = ... <--- step out from here
- `g` will return a value to the case continuation BCO in `f`
- The case continuation BCO will receive the value returned from g
- Match on it and push the alternative continuation for that branch
- And then enter that alternative.
If we step-out of `g`, the first RET_BCO on the stack is the case
continuation of `f` -- execution should stop at its start, before
selecting an alternative. (One might ask, "why not enable the breakpoint
in the alternative instead?", because the alternative continuation is
only pushed to the stack *after* it is selected by the case cont. BCO)
However, the case cont. BCO is not associated with any source-level
tick, it is merely the glue code which selects alternatives which do
have source level ticks. Therefore, we have to come up at code
generation time with a breakpoint location ('InternalBreakLoc') to
display to the user when it is stopped there.
Our solution is to use the last tick seen just before reaching the case
continuation. This is robust because a case continuation will thus
always have a relevant breakpoint location:
- The source location will be the last source-relevant expression
executed before the continuation is pushed
- So the source location will point to the thing you've just stepped
out of
- Doing :step-local from there will put you on the selected
alternative (which at the source level may also be the e.g. next
line in a do-block)
Examples, using angle brackets (<<...>>) to denote the breakpoint span:
f x = case <<g x>> {- step in here -} of
1 -> ...
2 -> ...>
g y = <<...>> <--- step out from here
...
f x = <<case g x of <--- end up here, whole case highlighted
1 -> ...
2 -> ...>>
doing :step-local ...
f x = case g x of
1 -> <<...>> <--- stop in the alternative
2 -> ...
A second example based on T26042d2, where the source is a do-block IO
action, optimised to a chain of `case expressions`.
main = do
putStrLn "hello1"
<<f>> <--- step-in here
putStrLn "hello3"
putStrLn "hello4"
f = do
<<putStrLn "hello2.1">> <--- step-out from here
putStrLn "hello2.2"
...
main = do
putStrLn "hello1"
<<f>> <--- end up here again, the previously executed expression
putStrLn "hello3"
putStrLn "hello4"
doing step/step-local ...
main = do
putStrLn "hello1"
f
<<putStrLn "hello3">> <--- straight to the next line
putStrLn "hello4"
Finishes #26042
- - - - -
c66910c0 by Rodrigo Mesquita at 2025-09-02T12:19:59-04:00
debugger: Re-use the last BreakpointId whole in step-out
Previously, to come up with a location to stop at for `:stepout`, we
would store the location of the last BreakpointId surrounding the
continuation, as described by Note [Debugger: Stepout internal break locs].
However, re-using just the location from the last source breakpoint
isn't sufficient to provide the necessary information in the break
location. Specifically, it wouldn't bind any variables at that location.
Really, there is no reason not to re-use the last breakpoint wholesale,
and re-use all the information we had there. Step-out should behave just
as if we had stopped at the call, but s.t. continuing will not
re-execute the call.
This commit updates the CgBreakInfo to always store a BreakpointId, be
it the original one or the one we're emulating (for step-out).
It makes variable bindings on :stepout work
- - - - -
e4abed7b by sheaf at 2025-09-02T12:20:40-04:00
Revert accidental changes to hie.yaml
- - - - -
003b715b by meooow25 at 2025-09-02T23:48:51+02:00
Adjust the strictness of Data.List.iterate'
* Don't force the next element in advance when generating a (:).
* Force the first element to WHNF like every other element.
Now every element in the output list is forced to WHNF when the (:)
containing it is forced.
CLC proposal:
https://github.com/haskell/core-libraries-committee/issues/335
- - - - -
b2f6aad0 by Simon Hengel at 2025-09-03T04:36:10-04:00
Refactoring: More consistently use logOutput, logInfo, fatalErrorMsg
- - - - -
60a16db7 by Rodrigo Mesquita at 2025-09-03T10:55:50+01:00
bytecode: Don't PUSH_L 0; SLIDE 1 1
While looking through bytecode I noticed a quite common unfortunate
pattern:
...
PUSH_L 0
SLIDE 1 1
We do this often by generically constructing a tail call from a function
atom that may be somewhere arbitrary on the stack.
However, for the special case that the function can be found directly on
top of the stack, as part of the arguments, it's plain redundant to push
then slide it.
In this commit we add a small optimisation to the generation of
tailcalls in bytecode. Simply: lookahead for the function in the stack.
If it is the first thing on the stack and it is part of the arguments
which would be dropped as we entered the tail call, then don't push then
slide it.
In a simple example (T26042b), this already produced a drastic
improvement in generated code (left is old, right is with this patch):
```diff
3c3
< 2025-07-29 10:14:02.081277 UTC
---
> 2025-07-29 10:50:36.560949 UTC
160,161c160
< PUSH_L 0
< SLIDE 1 2
---
> SLIDE 1 1
164,165d162
< PUSH_L 0
< SLIDE 1 1
175,176c172
< PUSH_L 0
< SLIDE 1 2
---
> SLIDE 1 1
179,180d174
< PUSH_L 0
< SLIDE 1 1
206,207d199
< PUSH_L 0
< SLIDE 1 1
210,211d201
< PUSH_L 0
< SLIDE 1 1
214,215d203
< PUSH_L 0
< SLIDE 1 1
218,219d205
< PUSH_L 0
< SLIDE 1 1
222,223d207
< PUSH_L 0
< SLIDE 1 1
...
600,601c566
< PUSH_L 0
< SLIDE 1 2
---
> SLIDE 1 1
604,605d568
< PUSH_L 0
< SLIDE 1 1
632,633d594
< PUSH_L 0
< SLIDE 1 1
636,637d596
< PUSH_L 0
< SLIDE 1 1
640,641d598
< PUSH_L 0
< SLIDE 1 1
644,645d600
< PUSH_L 0
< SLIDE 1 1
648,649d602
< PUSH_L 0
< SLIDE 1 1
652,653d604
< PUSH_L 0
< SLIDE 1 1
656,657d606
< PUSH_L 0
< SLIDE 1 1
660,661d608
< PUSH_L 0
< SLIDE 1 1
664,665d610
< PUSH_L 0
< SLIDE 1 1
```
I also compiled lib:Cabal to bytecode and counted the number of bytecode
lines with `find dist-newstyle -name "*.dump-BCOs" -exec wc {} +`:
with unoptimized core:
1190689 lines (before) - 1172891 lines (now)
= 17798 less redundant instructions (-1.5% lines)
with optimized core:
1924818 lines (before) - 1864836 lines (now)
= 59982 less redundant instructions (-3.1% lines)
- - - - -
8b2c72c0 by L0neGamer at 2025-09-04T06:32:03-04:00
Add Control.Monad.thenM and Control.Applicative.thenA
- - - - -
39e1b7cb by Teo Camarasu at 2025-09-04T06:32:46-04:00
ghc-internal: invert dependency of GHC.Internal.TH.Syntax on Data.Data
This means that Data.Data no longer blocks building TH.Syntax, which
allows greater parallelism in our builds.
We move the Data.Data.Data instances to Data.Data. Quasi depends on
Data.Data for one of its methods, so,
we split the Quasi/Q, etc definition out of GHC.Internal.TH.Syntax
into its own module. This has the added benefit of splitting up this
quite large module.
Previously TH.Syntax was a bottleneck when compiling ghc-internal. Now
it is less of a bottle-neck and is also slightly quicker to
compile (since it no longer contains these instances) at the cost of
making Data.Data slightly more expensive to compile.
TH.Lift which depends on TH.Syntax can also compile quicker and no
longer blocks ghc-internal finishing to compile.
Resolves #26217
-------------------------
Metric Decrease:
MultiLayerModulesTH_OneShot
T13253
T21839c
T24471
Metric Increase:
T12227
-------------------------
- - - - -
bdf82fd2 by Teo Camarasu at 2025-09-04T06:32:46-04:00
compiler: delete unused names in Builtins.Names.TH
returnQ and bindQ are no longer used in the compiler.
There was also a very old comment that referred to them that I have modernized
- - - - -
41a448e5 by Ben Gamari at 2025-09-04T19:21:43-04:00
hadrian: Pass lib & include directories to ghc `Setup configure`
- - - - -
46bb9a79 by Ben Gamari at 2025-09-04T19:21:44-04:00
rts/IPE: Fix compilation when zstd is enabled
This was broken by the refactoring undertaken in
c80dd91c0bf6ac034f0c592f16c548b9408a8481.
Closes #26312.
- - - - -
138a6e34 by sheaf at 2025-09-04T19:22:46-04:00
Make mkCast assertion a bit clearer
This commit changes the assertion message that gets printed when one
calls mkCast with a coercion whose kind does not match the type of the
inner expression. I always found the assertion message a bit confusing,
as it didn't clearly state what exactly was the error.
- - - - -
9d626be1 by sheaf at 2025-09-04T19:22:46-04:00
Simplifier/rules: fix mistakes in Notes & comments
- - - - -
94b62aa7 by Simon Peyton Jones at 2025-09-08T03:37:14-04:00
Refactor ForAllCo
This is a pure refactor, addressing #26389.
It arranges that the kind coercion in a ForAllCo is a MCoercion, rather
than a plain Coercion, thus removing redundancy in the common case.
See (FC8) in Note [ForAllCo]
It's a nice cleanup.
- - - - -
624afa4a by sheaf at 2025-09-08T03:38:05-04:00
Use tcMkScaledFunTys in matchExpectedFunTys
We should use tcMkScaledFunTys rather than mkScaledFunTys in
GHC.Tc.Utils.Unify.matchExpectedFunTys, as the latter crashes
when the kind of the result type is a bare metavariable.
We know the result is always Type-like, so we don't need scaledFunTys
to try to rediscover that from the kind.
Fixes #26277
- - - - -
0975d2b6 by sheaf at 2025-09-08T03:38:54-04:00
Revert "Remove hptAllFamInstances usage during upsweep"
This reverts commit 3bf6720eff5e86e673568e756161e6d6150eb440.
- - - - -
0cf34176 by soulomoon at 2025-09-08T03:38:54-04:00
Family consistency checks: add test for #26154
This commit adds the test T26154, to make sure that GHC doesn't crash
when performing type family consistency checks. This test case
was extracted from Agda.
Fixes #26154
- - - - -
ba210d98 by Simon Peyton Jones at 2025-09-08T16:26:36+01:00
Report solid equality errors before custom errors
This MR fixes #26255 by
* Reporting solid equality errors like
Int ~ Bool
before "custom type errors". See comments in `report1` in
`reportWanteds`
* Suppressing errors that arise from superclasses of
Wanteds. See (SCE1) in Note [Suppressing confusing errors]
More details in #26255.
- - - - -
b6249140 by Simon Peyton Jones at 2025-09-10T10:42:38-04:00
Fix a scoping error in Specialise
This small patch fixes #26329, which triggered a scoping error.
Test is in T21391, with -fpolymorphic-specialisation enabled
- - - - -
45305ab8 by sheaf at 2025-09-10T10:43:29-04:00
Make rationalTo{Float,Double} inline in phase 0
We hold off on inlining these until phase 0 to allow constant-folding
rules to fire. However, once we get to phase 0, we should inline them,
e.g. to expose unboxing opportunities.
See CLC proposal #356.
- - - - -
0959d4bc by Andreas Klebinger at 2025-09-10T10:44:12-04:00
Add regression test for #26056
- - - - -
dc79593d by sheaf at 2025-09-10T10:45:01-04:00
Deep subsumption: unify mults without tcEqMult
As seen in #26332, we may well end up with a non-reflexive multiplicity
coercion when doing deep subsumption. We should do the same thing that
we do without deep subsumption: unify the multiplicities normally,
without requiring that the coercion is reflexive (which is what
'tcEqMult' was doing).
Fixes #26332
- - - - -
4bfe2269 by sheaf at 2025-09-10T10:45:50-04:00
lint-codes: fixup MSYS drive letter on Windows
This change ensures that System.Directory.listDirectory doesn't trip up
on an MSYS-style path like '/c/Foo' when trying to list all testsuite
stdout/stderr files as required for testing coverage of GHC diagnostic
codes in the testsuite.
Fixes #25178
- - - - -
56540775 by Ben Gamari at 2025-09-10T10:46:32-04:00
gitlab-ci: Disable split sections on FreeBSD
Due to #26303.
- - - - -
1537784b by Moritz Angermann at 2025-09-10T10:47:13-04:00
Improve mach-o relocation information
This change adds more information about the symbol and addresses
we try to relocate in the linker. This significantly helps when
deubbging relocation issues reported by users.
- - - - -
4e67855b by Moritz Angermann at 2025-09-10T10:47:54-04:00
test.mk expect GhcLeadingUnderscore, not LeadingUnderscore (in line with the other Ghc prefixed variables.
- - - - -
c1cdd265 by Moritz Angermann at 2025-09-10T10:48:35-04:00
testsuite: Fix broken exec_signals_child.c
There is no signal 0. The signal mask is 1-32.
- - - - -
99ac335c by Moritz Angermann at 2025-09-10T10:49:15-04:00
testsuite: clarify Windows/Darwin locale rationale for skipping T6037 T2507 T8959a
- - - - -
0e8fa77a by Moritz Angermann at 2025-09-10T10:49:56-04:00
Skip broken tests on macOS (due to leading underscore not handled properly in the expected output.)
- - - - -
28570c59 by Zubin Duggal at 2025-09-10T10:50:37-04:00
docs(sphinx): fix links to reverse flags when using the :ghc-flag:`-fno-<flag>` syntax
This solution is rather hacky and I suspect there is a better way to do this but I don't know
enough about Sphinx to do better.
Fixes #26352
- - - - -
d17257ed by Cheng Shao at 2025-09-10T17:01:27+02:00
rel-eng: update alpine images to 3.22
This patch is a part of #25876 and updates alpine images to 3.22,
while still retaining 3.12 for x86_64 fully_static bindists.
-------------------------
Metric Decrease:
MultiComponentModulesRecomp
-------------------------
- - - - -
db3276bb by Sylvain Henry at 2025-09-11T11:27:28-04:00
T16180: indicate that the stack isn't executable
- - - - -
11eeeba7 by Sylvain Henry at 2025-09-11T11:27:28-04:00
Fix some tests (statically linked GHC vs libc)
When GHC is linked statically, the stdout C global variable that GHC uses
isn't shared with the stdout C global variable used by loaded code.
As a consequence, the latter must be explicitly flushed because GHC
won't flush it before exiting.
- - - - -
80a07571 by Sylvain Henry at 2025-09-11T11:28:18-04:00
Testsuite: fix debug_rts detection
Running the testsuite without Hadrian should set config.debug_rts
correctly too.
- - - - -
62ae97de by Duncan Coutts at 2025-09-12T13:23:33-04:00
Handle heap allocation failure in I/O primops
The current I/O managers do not use allocateMightFail, but future ones
will. To support this properly we need to be able to return to the
primop with a failure. We simply use a bool return value.
Currently however, we will just throw an exception rather than calling
the GC because that's what all the other primops do too.
For the general issue of primops invoking GC and retrying, see
https://gitlab.haskell.org/ghc/ghc/-/issues/24105
- - - - -
cb9093f5 by Duncan Coutts at 2025-09-12T13:23:33-04:00
Move (and rename) scheduleStartSignalHandlers into RtsSignals.h
Previously it was a local helper (static) function in Schedule.c.
Rename it to startPendingSignalHandlers and deifine it as an inline
header function in RtsSignals.h. So it should still be fast.
Each (new style) I/O manager is going to need to do the same, so eliminating
the duplication now makes sense.
- - - - -
9736d44a by Duncan Coutts at 2025-09-12T13:23:33-04:00
Reduce detail in printThreadBlockage I/O blocking cases
The printThreadBlockage is used in debug tracing output.
For the cases BlockedOn{Read,Write,Delay} the output previously included
the fd that was being waited on, and the delay target wake time.
Superficially this sounds useful, but it's clearly not that useful
because it was already wrong for the Win32 non-threaded I/O manager. In
that situation it will print garbage (the async_result pointer, cast to
a fd or a time).
So given that it apparently never mattered that the information was
accurate, then it's hardly a big jump to say it doesn't matter if it is
present at all.
A good reason to remove it is that otherwise we have to make a new
API and a per-I/O manager implementation to fetch the information. And
for some I/O manager implementations, this information is not available.
It is not available in the win32 non-threaded I/O manager. And for some
future Linux ones, there is no need for the fd to be stored, so storing
it would be just extra space used for very little gain.
So the simplest thing is to just remove the detail.
- - - - -
bc0f2d5d by Duncan Coutts at 2025-09-12T13:23:33-04:00
Add TimeoutQueue.{c,h} and corresponding tests
A data structure used to efficiently manage a collection of timeouts.
It is a priority queue based on absolute expiry time. It uses 64bit
high-precision Time for the keys. The values are normal closures which
allows for example using MVars for unblocking.
It is common in many applications for timeouts to be created and then
deleted or altered before they expire. Thus the choice of data structure
for timeouts should support this efficiently. The implementation choice
here is a leftist heap with the extra feature that it supports deleting
arbitrary elements, provided the caller retain a pointer to the element.
While the deleteMin operation takes O(log n) time, as in all heap
structures, the delete operation for arbitrary elements /typically/
takes O(1), and only O(log n) in the worst case. In practice, when
managing thousands of timeouts it can be a factor of 10 faster to delete
a random timeout queue element than to remove the minimum element. This
supports the common use case.
The plan is to use it in some of the RTS-side I/O managers to support
their timer functionality. In this use case the heap value will be an
MVar used for each timeout to unblock waiting threads.
- - - - -
d1679c9d by Duncan Coutts at 2025-09-12T13:23:33-04:00
Add ClosureTable.{c,h} and corresponding tests
A table of pointers to closures on the GC heap with stable indexes.
It provides O(1) alloc, free and lookup. The table can be expanded
using a simple doubling strategy: in which case allocation is typically
O(1) and occasionally O(n) for overall amortised O(1). No shrinking is
used.
The table itself is heap allocated, and points to other heap objects.
As such it's necessary to use markClosureTable to ensure the table is
used as a GC root to keep the table entries alive, and maintain proper
pointers to them as the GC moves heap objects about.
It is designed to be allocated and accesses exclusively from a single
capability, enabling it to work without any locking. It is thus similar
to the StablePtr table, but per-capability which removes the need for
locking. It _should_ also provide lower GC pause times with the
non-moving GC by spending only O(1) time in markClosureTable, vs O(n)
for markStablePtrTable.
The plan is to use it in some of the I/O managers to keep track of
in-flight I/O operations (but not timers). This allows the tracking
info to be kept on the (unpinned) GC heap, and shared with Haskell
code, and by putting a pointer to the tracking information in a table,
the index remains stable and can be passed via foreign code (like the
kernel).
- - - - -
78cb8dd5 by Duncan Coutts at 2025-09-12T13:23:33-04:00
Add the StgAsyncIOOp closure type
This is intended to be used by multiple I/O managers to help with
tracking in-flight I/O operations.
It is called asynchronous because from the point of view of the RTS we
have many such operations in progress at once. From the point of view of
a Haskell thread of course it can look synchronous.
- - - - -
a2839896 by Duncan Coutts at 2025-09-12T13:23:33-04:00
Add StgAsyncIOOp and StgTimeoutQueue to tso->block_info
These will be used by new I/O managers, for threads blocked on I/O or
timeouts.
- - - - -
fdc2451c by Duncan Coutts at 2025-09-12T13:23:33-04:00
Add a new I/O manager based on poll()
This is a proof of concept I/O manager, to show how to add new ones
neatly, using the ClosureTable and TimeoutQueue infrastructure.
It uses the old unix poll() API, so it is of course limited in
performance by that, but it should have the benefit of wide
compatibility. Also we neatly avoid a name clash with the existing
select() I/O manager.
Compared to the select() I/O manager:
1. beause it uses poll() it is not limited to 1024 file descriptors
(but it's still O(n) so don't expect great performance);
2. it should have much faster threadDelay (when using it in lots of
threads at once) because it's based on the new TimeoutQueue which is
O(log n) rather than O(n).
Some of the code related to timers/timouts is put into a shared module
rts/posix/Timeout.{h,c} since it is intended to be shared with other
similar I/O managers.
- - - - -
6c273b76 by Duncan Coutts at 2025-09-12T13:23:34-04:00
Document the I/O managers in the user guide
and note the new poll I/O manager in the release notes.
- - - - -
824fab74 by Duncan Coutts at 2025-09-12T13:23:34-04:00
Use the poll() I/O manager by default
That is, for the non-threaded RTS, prefer the poll I/O manager over the
legacy select() one, if both can be enabled.
This patch is primarily for CI testing, so we should probably remove
this patch before merging. We can change defaults later after wider
testing and feedback.
- - - - -
39392532 by Luite Stegeman at 2025-09-12T13:24:16-04:00
Support larger unboxed sums
Change known constructor encoding for sums in interfaces to use
11 bits for both the arity and the alternative (up from 8 and 6,
respectively)
- - - - -
2af12e21 by Luite Stegeman at 2025-09-12T13:24:16-04:00
Decompose padding smallest-first in Cmm toplevel data constructors
This makes each individual padding value aligned
- - - - -
418fa78f by Luite Stegeman at 2025-09-12T13:24:16-04:00
Use slots smaller than word as tag for smaller unboxed sums
This packs unboxed sums more efficiently by allowing
Word8, Word16 and Word32 for the tag field if the number of
constructors is small enough
- - - - -
8d7e912f by Rodrigo Mesquita at 2025-09-12T17:57:24-04:00
ghc-toolchain: Use ByteOrder rather than new Endianness
Don't introduce a duplicate datatype when the previous one is equivalent
and already used elsewhere. This avoids unnecessary translation between
the two.
- - - - -
7d378476 by Rodrigo Mesquita at 2025-09-12T17:57:24-04:00
Read Toolchain.Target files rather than 'settings'
This commit makes GHC read `lib/targets/default.target`, a file with a
serialized value of `ghc-toolchain`'s `GHC.Toolchain.Target`.
Moreover, it removes all the now-redundant entries from `lib/settings`
that are configured as part of a `Target` but were being written into
`settings`.
This makes it easier to support multiple targets from the same compiler
(aka runtime retargetability). `ghc-toolchain` can be re-run many times
standalone to produce a `Target` description for different targets, and,
in the future, GHC will be able to pick at runtime amongst different
`Target` files.
This commit only makes it read the default `Target` configured in-tree
or configured when installing the bindist.
The remaining bits of `settings` need to be moved to `Target` in follow
up commits, but ultimately they all should be moved since they are
per-target relevant.
Fixes #24212
On Windows, the constant overhead of parsing a slightly more complex
data structure causes some small-allocation tests to wiggle around 1 to
2 extra MB (1-2% in these cases).
-------------------------
Metric Increase:
MultiLayerModulesTH_OneShot
T10421
T10547
T12234
T12425
T13035
T18140
T18923
T9198
TcPlugin_RewritePerf
-------------------------
- - - - -
e0780a16 by Rodrigo Mesquita at 2025-09-12T17:57:24-04:00
ghc-toolchain: Move TgtHasLibm to per-Target file
TargetHasLibm is now part of the per-target configuration
Towards #26227
- - - - -
8235dd8c by Rodrigo Mesquita at 2025-09-12T17:57:24-04:00
ghc-toolchain: Move UseLibdw to per-Target file
To support DWARF unwinding, the RTS must be built with the -f+libdw flag
and with the -DUSE_LIBDW macro definition. These flags are passed on
build by Hadrian when --enable-dwarf-unwinding is specified at configure
time.
Whether the RTS was built with support for DWARF is a per-target
property, and as such, it was moved to the per-target
GHC.Toolchain.Target.Target file.
Additionally, we keep in the target file the include and library paths
for finding libdw, since libdw should be checked at configure time (be
it by configure, or ghc-toolchain, that libdw is properly available).
Preserving the user-given include paths for libdw facilitates in the
future building the RTS on demand for a given target (if we didn't keep
that user input, we couldn't)
Towards #26227
- - - - -
d5ecf2e8 by Rodrigo Mesquita at 2025-09-12T17:57:25-04:00
ghc-toolchain: Make "Support SMP" a query on a Toolchain.Target
"Support SMP" is merely a function of target, so we can represent it as
such in `ghc-toolchain`.
Hadrian queries the Target using this predicate to determine how to
build GHC, and GHC queries the Target similarly to report under --info
whether it "Support SMP"
Towards #26227
- - - - -
e07b031a by Rodrigo Mesquita at 2025-09-12T17:57:25-04:00
ghc-toolchain: Make "tgt rts linker only supports shared libs" function on Target
Just like with "Support SMP", "target RTS linker only supports shared
libraries" is a predicate on a `Target` so we can just compute it when
necessary from the given `Target`.
Towards #26227
- - - - -
14123ee6 by Simon Peyton Jones at 2025-09-12T17:58:07-04:00
Solve forall-constraints via an implication, again
In this earlier commit:
commit 953fd8f1dc080f1c56e3a60b4b7157456949be29
Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com>
Date: Mon Jul 21 10:06:43 2025 +0100
Solve forall-constraints immediately, or not at all
I used a all-or-nothing strategy for quantified constraints
(aka forall-constraints). But alas that fell foul of #26315,
and #26376.
So this MR goes back to solving a quantified constraint by
turning it into an implication; UNLESS we are simplifying
constraints from a SPECIALISE pragma, in which case the
all-or-nothing strategy is great. See:
Note [Solving a Wanted forall-constraint]
Other stuff in this MR:
* TcSMode becomes a record of flags, rather than an enumeration
type; much nicer.
* Some fancy footwork to avoid error messages worsening again
(The above MR made them better; we want to retain that.)
See `GHC.Tc.Errors.Ppr.pprQCOriginExtra`.
-------------------------
Metric Decrease:
T24471
-------------------------
- - - - -
e6c192e2 by Simon Peyton Jones at 2025-09-12T17:58:07-04:00
Add a test case for #26396
...same bug ast #26315
- - - - -
8f3d80ff by Luite Stegeman at 2025-09-13T08:43:09+02:00
Use mkVirtHeapOffsets for reconstructing terms in RTTI
This makes mkVirtHeapOffsets the single source of truth for
finding field offsets in closures.
- - - - -
eb389338 by Luite Stegeman at 2025-09-13T08:43:09+02:00
Sort non-pointer fields by size for more efficient packing
This sorts non-pointer fields in mkVirtHeapOffsets, always
storing the largest field first. The relative order of
equally sized fields remains unchanged.
This reduces wasted padding/alignment space in closures with
differently sized fields.
- - - - -
99b233f4 by Alison at 2025-09-13T16:51:04-04:00
ghc-heap: Fix race condition with profiling builds
Apply the same fix from Closures.hs (64fd0fac83) to Heap.hs by adding
empty imports to make way-dependent dependencies visible to `ghc -M`.
Fixes #15197, #26407
- - - - -
77deaa7a by Cheng Shao at 2025-09-14T21:29:45-04:00
hadrian: build in-tree gmp with -fvisibility=hidden
When hadrian builds in-tree gmp, it should build the shared objects
with -fvisibility=hidden. The gmp symbols are only used by bignum
logic in ghc-internal and shouldn't be exported by the ghc-internal
shared library. We should always strive to keep shared library symbol
table lean, which benefits platforms with slow dynamic linker or even
hard limits about how many symbols can be exported (e.g. macos dyld,
win32 dll and wasm dyld).
- - - - -
42a18960 by Cheng Shao at 2025-09-14T21:30:26-04:00
Revert "wasm: add brotli compression for ghci browser mode"
This reverts commit 731217ce68a1093b5f9e26a07d5bd2cdade2b352.
Benchmarks show non-negligible overhead when browser runs on the same
host, which is the majority of actual use cases.
- - - - -
e6755b9f by Cheng Shao at 2025-09-14T21:30:26-04:00
wasm: remove etag logic in ghci browser mode web server
This commit removes the etag logic in dyld script's ghci browser mode
web server. It was meant to support caching logic of wasm shared
libraries, but even if the port is manually specified to make caching
even relevant, for localhost the extra overhead around etag logic is
simply not worth it according to benchmarks.
- - - - -
ac5859b9 by sheaf at 2025-09-16T14:58:38-04:00
Add 'Outputable Natural' instance
This commit adds an Outputable instance for the Natural natural-number type,
as well as a "natural :: Natural -> SDoc" function that mirrors the existing
"integer" function.
- - - - -
d48ebc23 by Cheng Shao at 2025-09-16T14:59:18-04:00
autoconf: emit warning instead of error for FIND_PYTHON logic
This patch makes FIND_PYTHON logic emit warning instead of error, so
when the user doesn't expect to run the testsuite driver (especially
when installing a bindist), python would not be mandatory. Fixes #26347.
- - - - -
54b5950e by Sylvain Henry at 2025-09-17T04:45:18-04:00
Print fully qualified unit names in name mismatch
It's more user-friendly to directly print the right thing instead of
requiring the user to retry with the additional `-dppr-debug` flag.
- - - - -
403cb665 by Ben Gamari at 2025-09-17T04:46:00-04:00
configure: Fix consistency between distrib and source CC check
Previously distrib/configure.ac did not
include `cc`.
Closes #26394.
- - - - -
2dcd4cb9 by Oleg Grenrus at 2025-09-17T04:46:41-04:00
Use isPrint in showUnique
The comment say
```
-- Avoid emitting non-printable characters in pretty uniques. See #25989.
```
so let the code do exactly that.
There are tags (at least : and 0 .. 9) which weren't in A .. z range.
- - - - -
e5dd754b by Oleg Grenrus at 2025-09-17T04:46:42-04:00
Shorten in-module links in hyperlinked source
Instead of href="This.Module#ident" to just "#ident"
- - - - -
63189b2c by Oleg Grenrus at 2025-09-17T04:46:42-04:00
Use showUnique in internalAnchorIdent
Showing the key of Unique as a number is generally not a great idea.
GHC Unique has a tag in high bits, so the raw number is unnecessarily
big.
So now we have
```html
<a href="#l-rvgK"><span class="hs-identifier hs-var hs-var">bar</span></a>
```
instead of
```html
<a href="#local-6989586621679015689"><span class="hs-identifier hs-var hs-var">bar</span></a>
```
Together with previous changes of shorter intra-module links the effect
on compressed files is not huge, that is expected as we simply remove
repetitive contents which pack well.
```
12_694_206 Agda-2.9.0-docs-orig.tar.gz
12_566_065 Agda-2.9.0-docs.tar.gz
```
However when unpacked, the difference can be significant,
e.g. Agda's largest module source got 5% reduction:
```
14_230_117 Agda.Syntax.Parser.Parser.html
13_422_109 Agda.Syntax.Parser.Parser.html
```
The whole hyperlinked source code directory got similar reduction
```
121M Agda-2.9.0-docs-orig/src
114M Agda-2.9.0-docs/src
```
For the reference, sources are about 2/3 of the generated haddocks
```
178M Agda-2.9.0-docs-old
172M Agda-2.9.0-docs
```
so we get around 3.5% size reduction overall. Not bad for a small local
changes.
- - - - -
6f63f57b by Stefan Schulze Frielinghaus at 2025-09-17T04:47:22-04:00
rts: Fix alignment for gen_workspace #26334
After a0fa4941903272c48b050d24e93eec819eff51bd bootstrap is broken on
s390x and errors out with
rts/sm/GCThread.h:207:5: error:
error: alignment of array elements is greater than element size
207 | gen_workspace gens[];
| ^~~~~~~~~~~~~
The alignment constraint is applied via the attribute to the type
gen_workspace and leaves the underlying type struct gen_workspace_
untouched. On Aarch64, x86, and s390x the struct has a size of 128
bytes. On Aarch64 and x86 the alignments of 128 and 64 are divisors of
the size, respectively, which is why the type is a viable member type
for an array. However, on s390x, the alignment is 256 and therefore is
not a divisor of the size and hence cannot be used for arrays.
Basically I see two fixes here. Either decrease the alignment
requirement on s390x, or by applying the alignment constraint on the
struct itself. The former might affect performance as noted in
a0fa4941903272c48b050d24e93eec819eff51bd. The latter introduces padding
bits whenever necessary in order to ensure that
sizeof(gen_workspace[N])==N*sizeof(gen_workspace) holds which is done by
this patch.
- - - - -
06d25623 by Cheng Shao at 2025-09-17T19:32:27-04:00
ghci: add :shell command
This patch adds a new :shell command to ghci which works similarly to
:!, except it guarantees to run the command via sh -c. On POSIX hosts
the behavior is identical to :!, but on Windows it uses the msys2
shell instead of system cmd.exe shell. This is convenient when writing
simple ghci scripts that run simple POSIX commands, and the behavior
can be expected to be coherent on both Windows and POSIX.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
186054f7 by Cheng Shao at 2025-09-17T19:32:27-04:00
testsuite: remove legacy :shell trick
This commit makes use of the built-in :shell functionality in ghci in
the test cases, and remove the legacy :shell trick.
- - - - -
0a3a4aa3 by Cheng Shao at 2025-09-17T19:32:27-04:00
docs: document :shell in ghci
This commit documents the :shell command in ghci.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
a4ff12bb by Cheng Shao at 2025-09-17T19:33:09-04:00
ghc-internal: fix codepages program
codepages was not properly updated during the base -> ghc-internal
migration, this commit fixes it.
- - - - -
7e094def by Cheng Shao at 2025-09-17T19:33:09-04:00
ghc-internal: relax ucd2haskell cabal upper bounds
This commit relaxes ucd2haskell cabal upper bounds to make it runnable
via ghc 9.12/9.14.
- - - - -
7077c9f7 by Cheng Shao at 2025-09-17T19:33:09-04:00
ghc-internal: update to unicode 17.0.0
This commit updates the generated code in ghc-internal to match
unicode 17.0.0.
- - - - -
cef8938f by sheaf at 2025-09-17T19:34:09-04:00
Bad record update msg: allow out-of-scope datacons
This commit ensures that, when we encounter an invalid record update
(because no constructor exists which contains all of the record fields
mentioned in the record update), we graciously handle the situation in
which the constructors themselves are not in scope. In that case,
instead of looking up the constructors in the GlobalRdrEnv, directly
look up their GREInfo using the lookupGREInfo function.
Fixes #26391
- - - - -
a2d9d7c2 by sheaf at 2025-09-17T19:34:09-04:00
Improve Notes about disambiguating record updates
This commit updates the notes [Disambiguating record updates] and
[Type-directed record disambiguation], in particular adding more
information about the deprecation status of type-directed disambiguation
of record updates.
- - - - -
de44e69e by sheaf at 2025-09-19T05:16:51-04:00
Enable TcM plugins in initTc
This commit ensures that we run typechecker plugins and defaulting
plugins whenever we call initTc.
In particular, this ensures that the pattern-match checker, which calls
'initTcDsForSolver' which calls 'initTc', runs with typechecker plugins
enabled. This matters for situations like:
merge :: Vec n a -> Vec n a -> Vec (2 * n) a
merge Nil Nil = Nil
merge (a <: as) (b <: bs) = a :< (b <: merge as bs)
in which we need the typechecker plugin to run in order to tell us that
the Givens would be inconsistent in the additional equation
merge (_ <: _) Nil
and thus that the equation is not needed.
Fixes #26395
- - - - -
2c378ad2 by Cheng Shao at 2025-09-19T05:17:33-04:00
rel-eng: update fedora image to 42
This patch is a part of #25876 and updates fedora image to 42.
- - - - -
0a9d9ffc by Sylvain Henry at 2025-09-19T13:12:14-04:00
Fix output of T14999 (#23685)
Fix output of T14999 to:
- take into account the +1 offset to DW_AT_low_pc (see Note [Info Offset])
- always use Intel's syntax to force consistency: it was reported that
sometimes GDB prints `jmpq` instead of `jmp` with the AT&T syntax
- - - - -
1480872a by Vladislav Zavialov at 2025-09-19T13:12:54-04:00
Fix PREP_MAYBE_LIBRARY in prep_target_file.m4
This change fixes a configure error introduced in:
commit 8235dd8c4945db9cb03e3be3c388d729d576ed1e
ghc-toolchain: Move UseLibdw to per-Target file
Now the build no longer fails with:
acghc-toolchain: Failed to read a valid Target value from hadrian/cfg/default.target
- - - - -
d1d9e39e by Ben Gamari at 2025-09-19T18:24:52-04:00
StgToByteCode: Don't assume that data con workers are nullary
Previously StgToByteCode assumed that all data-con workers were of a
nullary representation. This is not a valid assumption, as seen
in #23210, where an unsaturated application of a unary data
constructor's worker resulted in invalid bytecode. Sadly, I have not yet
been able to reduce a minimal testcase for this.
Fixes #23210.
- - - - -
3eeecd50 by Ben Gamari at 2025-09-19T18:24:53-04:00
testsuite: Mark T23146* as unbroken
- - - - -
2e73f342 by sheaf at 2025-09-19T18:24:53-04:00
Add test for #26216
- - - - -
c2efb912 by Sven Tennie at 2025-09-19T18:25:36-04:00
Generate correct test header
This increases convenience when copying & pasting...
- - - - -
d2fb811e by Sven Tennie at 2025-09-19T18:25:36-04:00
foundation test: Fix shift amount (#26248)
Shift primops' results are only defined for shift amounts of 0 to word
size - 1. The approach is similar to testing div-like operations (which
have a constraint regarding zero operands.)
This was partly vibe coded (https://github.com/supersven/ghc/pull/1) but
then heavily refactored.
- - - - -
a62ce115 by Andreas Klebinger at 2025-09-19T18:26:18-04:00
Tweak jspace test
I've given it a longer timeout, and tweaked the test file generation
to speed it up a bit. Hopefully that is enough to make it constentily pass.
Last but not least it now also always uses three threads.
- - - - -
0f034942 by Cheng Shao at 2025-09-19T18:26:59-04:00
rts: remove obsolete CC_SUPPORTS_TLS logic
This patch removes obsolete CC_SUPPORTS_TLS logic throughout the rts,
given __thread is now uniformly supported by C toolchains of all
platforms we currently support.
- - - - -
ef705655 by Cheng Shao at 2025-09-19T18:27:41-04:00
rts: remove obsolete HAS_VISIBILITY_HIDDEN logic
This patch removes obsolete HAS_VISIBILITY_HIDDEN logic throughout the
rts, given __attribute__((visibility("hidden"))) is uniformly
supported by C toolchains of all platforms we currently support.
- - - - -
9fdc1f7d by Cheng Shao at 2025-09-19T18:28:21-04:00
rts: remove -O3 pragma hack in Hash.c
This patch removes an obsolete gcc pragma to specify -O3 in Hash.c.
Hadrian already passes the right flag.
- - - - -
b8cfa8f7 by Cheng Shao at 2025-09-19T18:29:01-04:00
rts: remove obsolete COMPILING_WINDOWS_DLL logic
This patch removes obsolete COMPILING_WINDOWS_DLL logic throughout the
rts. They were once used for compiling to win32 DLLs, but we haven't
been able to compile Haskell units to win32 DLLs for many years now,
due to PE format's restriction of no more than 65536 exported symbols
in a single DLL.
- - - - -
bb760611 by Cheng Shao at 2025-09-19T18:29:42-04:00
wasm: bump browser_wasi_shim to 0.4.2
This patch bumps the browser_wasi_shim dependency of wasm dyld script
to 0.4.2.
- - - - -
8b0940db by Cheng Shao at 2025-09-20T06:48:05-04:00
compiler: move Binary instance of Map to GHC.Utils.Binary
This patch moves `Binary` instance of `Map` from `haddock-api` to
`GHC.Utils.Binary`. This also allows us to remove a redundant instance
defined for `NameEntityInfo`, which is a type synonym for `Map`.
- - - - -
4a8fed75 by Vladislav Zavialov at 2025-09-20T06:48:47-04:00
Fix keyword in ExplicitNamespaces error message (#26418)
Consider this module header and the resulting error:
{-# LANGUAGE NoExplicitNamespaces #-}
module T26418 (data HeadC) where
-- error: [GHC-47007]
-- Illegal keyword 'type'
Previously, the error message would mention 'type' (as shown above),
even though the user wrote 'data'. This has now been fixed.
The error location has also been corrected: it is now reported at the
keyword position rather than at the position of the associated
import/export item.
- - - - -
867c2675 by Cheng Shao at 2025-09-20T06:49:28-04:00
wasm: fix dyld handling for forward declared GOT.func items
This patch fixes wasm shared linker's handling of forward declared
GOT.func items, see linked issue for details. Also adds T26430 test to
witness the fix. Fixes #26430.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
e7df6cc0 by Simon Peyton Jones at 2025-09-23T14:34:39-04:00
Improve pretty printer for HsExpr
Given a very deeply-nested application, it just kept printing
deeper and deeper. This small change makes it cut off.
Test is in #26330, but we also get a dramatic decrease in compile
time for perf/compiler/InstanceMatching:
InstanceMatching 4,086,884,584 1,181,767,232 -71.1% GOOD
Why? Because before we got a GIGANTIC error message that took
ages to pretty-print; now we get this much more civilised message
(I have removed some whitespace.)
Match.hs:1007:1: error:
• No instance for ‘Show (F001 a)’ arising from a use of ‘showsPrec’
• In the second argument of ‘showString’, namely
‘(showsPrec
11 b1
(GHC.Internal.Show.showSpace
(showsPrec
11 b2
(GHC.Internal.Show.showSpace
(showsPrec
11 b3
(GHC.Internal.Show.showSpace
(showsPrec
11 b4
(GHC.Internal.Show.showSpace
(showsPrec
11 b5
(GHC.Internal.Show.showSpace
(showsPrec
11 b6
(GHC.Internal.Show.showSpace (showsPrec ...)))))))))))))’
-----------------------
The main payload is
* At the start of `pprExpr`
* In the defn of `pprApp`
A little bit of refactoring:
* It turned out that we were setting the default cut-off depth to a
fixed value in two places, so changing one didn't change the other.
See defaultSDocDepth and defaultSDocCols
* I refactored `pprDeeperList` a bit so I could understand it better.
Because the depth calculation has changed, there are lots of small
error message wibbles.
Metric Decrease:
InstanceMatching
- - - - -
209f0158 by Simon Peyton Jones at 2025-09-23T14:34:39-04:00
Use Outputable.ellipsis rather than text "..."
- - - - -
64bb0e37 by Sylvain Henry at 2025-09-23T14:35:56-04:00
deriveConstants: automatically pass -fcommon CC flag (#26393)
By mistake we tried to use deriveConstants without passing
`--gcc-flag -fcommon` (which Hadrian does) and it failed.
This patch:
1. adds parsing support for constants stored in the .bss section (i.e.
when -fcommon isn't passed)
2. enables passing `-fcommon` automatically to the C compiler because
Windows requires this for subtle reasons
3. Documents the subtle reasons
(1) isn't strictly necessary because we always do (2) but it does no
harm and it is still useful if the CC flags ever contain -fno-common
- - - - -
afcdf92f by Oleg Grenrus at 2025-09-23T14:36:41-04:00
Don't wrap spaces in <span>s
Doing similar comparison as in 63189b2ceca07edf4e179f4180ca60d470c62cb3
With this change the gzipped documentation is now 2% smaller (previously 1%)
12_694_206 Agda-2.9.0-docs-orig.tar.gz
12_436_829 Agda-2.9.0-docs.tar.gz
Unzipped docs are 5% smaller (previously 3%)
178M Agda-2.9.0-docs-orig
169M Agda-2.9.0-docs
Individual hyperlinked sources are around 7-10% smaller (previously 5%)
(`Parser` module is generated by happy and has relatively little whitespace)
14_230_117 Agda.Syntax.Parser.Parser.html
13_220_758 Agda.Syntax.Parser.Parser.html
Agda's hyperlinked sources are 9% smaller now:
121M Agda-2.9.0-docs-orig/src
110M Agda-2.9.0-docs/src
- - - - -
67de53a6 by Cheng Shao at 2025-09-23T14:37:31-04:00
rts: remove obsolete __GNUC__ related logic
This patch removes obsolete `__GNUC__` related logic, given on any
currently supported platform and toolchain, `__GNUC__ >= 4` is
universally true. Also pulls some other weeds and most notably, use
`__builtin___clear_cache` for clang as well, since clang has supported
this gcc intrinsic since 2014, see
https://github.com/llvm/llvm-project/commit/c491a8d4577052bc6b3b4c72a7db6a7….
- - - - -
c4d32493 by Sven Tennie at 2025-09-23T20:40:57-04:00
RV64: Fix: Add missing truncation to MO_S_Shr (#26248)
Sub-double word (<W64) registers need to be truncated after the
operation.
- - - - -
41dce477 by Sven Tennie at 2025-09-23T20:40:57-04:00
RV64: Cleanup shift emitting cases/code
Remove overlapping cases to make the shift logic easier to understand.
- - - - -
0a601c30 by Alex Washburn at 2025-09-23T20:41:41-04:00
Correcting LLVM linking of Intel BMI intrinsics pdep{8,16} and pext{8,16}.
This patch fixes #26065.
The LLVM interface does not expose bindings to:
- llvm.x86.bmi.pdep.8
- llvm.x86.bmi.pdep.16
- llvm.x86.bmi.pext.8
- llvm.x86.bmi.pext.16
So calls are instead made to llvm.x86.bmi.{pdep,pext}.32 in these cases,
with pre/post-operation truncation to constrain the logical value range.
- - - - -
89e8ff3d by Peng Fan at 2025-09-23T20:42:37-04:00
NCG/LA64: Implement MO_BSwap and MO_BRev with bit-manipulation Instructions
- - - - -
50f6be09 by Sylvain Henry at 2025-09-23T20:43:29-04:00
Allow Core plugins to access unoptimized Core (#23337)
Make the first simple optimization pass after desugaring a real CoreToDo
pass. This allows CorePlugins to decide whether they want to be executed
before or after this pass.
- - - - -
30ef0aac by Simon Hengel at 2025-09-23T20:44:12-04:00
docs: Fix typo in scoped_type_variables.rst
- - - - -
f8919262 by Cheng Shao at 2025-09-23T20:44:54-04:00
ghci: fix bootstrapping with 9.12.3-rc1 and above
This patch fixes bootstrapping GHC with 9.12.3-rc1 and above. ghci
defines `Binary` instance for `HalfWord` in `ghc-heap`, which is a
proper `newtype` in 9.14 and starting from 9.12.3. Given we don't
build `ghc-heap` in stage0, we need to fix this predicate so that it
corresponds to the boot ghc versions that contain the right version of
`ghc-heap`.
- - - - -
a7f15858 by sheaf at 2025-09-24T09:49:53-04:00
User's guide: clarify optimisation of INLINABLE unfoldings
This updates the user's guide section on INLINABLE pragmas to explain how
the unfoldings of inlineable functions are optimised. The user's guide incorrectly
stated that the RHS was not optimised at all, but this is not true. Instead, GHC
is careful about phase control to optmise the RHS while retaining the guarantee
that GHC behaves as if the original RHS had been written.
- - - - -
495886d9 by Rodrigo Mesquita at 2025-09-24T09:50:35-04:00
cleanup: Delete historical artifact of COMPILING_WINDOWS_DLL
Namely, drop the obsolete
- DLL_IMPORT_RTS
- DLL_IMPORT_DATA_VAR
- DLL_IMPORT_DATA_VARNAME
- DLL_IMPORT_DATA_REF
These macros were not doing anything and placed inconsistently
Looking at the git logs reveal these macros were used to support
dynamic libraries on Win32, a feature that was dropped
in b8cfa8f741729ef123569fb321c4b2ab4a1a941c
This allows us to get rid of the rts/DLL.h file too.
- - - - -
5ae89054 by Sylvain Henry at 2025-09-24T17:07:00-04:00
Allow disabling builtin rules (#20298)
Add a way to disable built-in rules programmatically and with a debug flag.
I also took the opportunity to add a debug flag to disable bignum rules,
which was only possible programmatically (e.g. in a plugin).
- - - - -
135242ca by Rodrigo Mesquita at 2025-09-24T17:07:44-04:00
Don't use build CFLAGS and friends as target settings
In the GHC in tree configure, `CFLAGS`, `CXXFLAGS`, and similar tool
configuration flags apply to the BUILD phase of the compiler, i.e. to
the tools run to compile GHC itself.
Notably, they should /not/ be carried over to the Target settings, i.e.
these flags should /not/ apply to the tool which GHC invokes at runtime.
Fixes #25637
- - - - -
b418408b by Irene Knapp at 2025-09-25T09:47:54-04:00
Document etymology of "bind" as the name for `>>=`
It took me twenty years of contemplation to realize why it's called that.
I therefore feel that it may not be obvious to beginners.
- - - - -
e9c5e46f by Brandon Chinn at 2025-09-25T09:48:36-04:00
Fix tabs in string gaps (#26415)
Tabs in string gaps were broken in bb030d0d because previously, string gaps were manually parsed, but now it's lexed by the usual Alex grammar and post-processed after successful lexing.
It broke because of a discrepancy between GHC's lexer grammar and the Haskell Report. The Haskell Report includes tabs in whitechar:
whitechar → newline | vertab | space | tab | uniWhite
$whitechar used to include tabs until 18 years ago, when it was removed in order to exclude tabs from $white_no_nl in order to warn on tabs: 6e202120. In this MR, I'm adding \t back into $whitechar, and explicitly excluding \t from the $white_no_nl+ rule ignoring all whitespace in source code, which more accurately colocates the "ignore all whitespace except tabs, which is handled in the next line" logic.
As a side effect of this MR, tabs are now allowed in pragmas; currently, a pragma written as {-# \t LANGUAGE ... #-} is interpreted as the tab character being the pragma name, and GHC warns "Unrecognized pragma". With this change, tabs are ignored as whitespace, which more closely matches the Report anyway.
- - - - -
8bf5b309 by Cheng Shao at 2025-09-25T09:49:18-04:00
wasm: remove the --no-turbo-fast-api-calls hack from dynamic linker shebang
This patch removes the `--no-turbo-fast-api-calls` hack from the dyld
script shebang; it was used to workaround v8 fast call coredumps in
nodejs and no longer needed, and comes with a performance penalty,
hence the removal.
- - - - -
c1cab0c3 by Sylvain Henry at 2025-09-26T10:36:30-04:00
Revert "Add necessary flag for js linking"
This reverts commit 84f68e2231b2eddb2e1dc4e90af394ef0f2e803f.
This commit didn't have the expected effect. See discussion in #26290.
Instead we export HEAP8 and HEAPU8 from rts/js/mem.js
- - - - -
0a434a80 by Sylvain Henry at 2025-09-26T10:36:30-04:00
JS: export HEAPU8 (#26290)
This is now required by newer Emscripten versions.
- - - - -
b10296a9 by Andreas Klebinger at 2025-09-26T10:37:11-04:00
sizeExpr: Improve Tick handling.
When determining if we scrutinize a function argument we
now properly look through ticks. Fixes #26444.
- - - - -
d9e2a9a7 by mniip at 2025-09-26T16:00:50-04:00
rts: Refactor parsing of -h flags
We have a nontrivial amount of heap profiling flags available in the
non-profiled runtime, so it makes sense to reuse the parsing code
between the profiled and the non-profiled runtime, only restricting
which flags are allowed.
- - - - -
089e45aa by mniip at 2025-09-26T16:00:50-04:00
rts: Fix parsing of -h options with braces
When the "filter by" -h options were introduced in
bc210f7d267e8351ccb66972f4b3a650eb9338bb, the braces were mandatory.
Then in 3c22fb21fb18e27ce8d941069a6915fce584a526, the braces were made
optional. Then in d1ce35d2271ac8b79cb5e37677b1a989749e611c the brace
syntax stopped working, and no one seems to have noticed.
- - - - -
423f1472 by mniip at 2025-09-26T16:00:50-04:00
rts: add -hT<type> and -hi<table id> heap filtering options (#26361)
They are available in non-profiled builds.
Along the way fixed a bug where combining -he<era> and -hr<retainer>
would ignore whether the retainer matches or not.
- - - - -
4cda4785 by mniip at 2025-09-26T16:00:50-04:00
docs: Document -hT<type> and -hi<addr>
- - - - -
982ad30f by mniip at 2025-09-26T16:00:50-04:00
rts: Refactor dumping the heap census
Always do the printing of the total size right next to where the bucket
label is printed. This prevents accidentally printing a label without
the corresponding amount.
Fixed a bug where exactly this happened for -hi profile and the 0x0
(uncategorized) info table.
There is now also much more symmetry between fprintf(hp_file,...) and
the corresponding traceHeapProfSampleString.
- - - - -
8cbe006a by Cheng Shao at 2025-09-26T16:01:34-04:00
hadrian: fix GHC.Platform.Host generation for cross stage1
This patch fixes incorrectly GHC.Platform.Host generation logic for
cross stage1 in hadrian (#26449). Also adds T26449 test case to
witness the fix.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
0ddd0fdc by soulomoon at 2025-09-28T19:24:10-04:00
Remove hptAllInstances usage during upsweep
Previously, during the upsweep phase when
checking safe imports, we were loading the module
interface with runTcInteractive, which in turn calls
hptAllInstances. This accesses non-below modules
from the home package table.
Change the implementation of checkSafeImports
to use initTcWithGbl and loadSysInterface to load the
module interface, since we already have TcGblEnv at hand.
This eliminates the unnecessary use of runTcInteractive
and hptAllInstances during the upsweep phase.
- - - - -
e05c496c by Ben Gamari at 2025-09-28T19:24:59-04:00
base: Update changelog to reflect timing of IOPort# removal
This change will make 9.14 afterall.
- - - - -
bdc9d130 by Cheng Shao at 2025-09-28T19:25:45-04:00
rts: fix wasm JSFFI initialization constructor code
This commit fixes wasm JSFFI initialization constructor code so that
the constructor is self-contained and avoids invoking a fake
__main_argc_argv function. The previous approach of reusing
__main_void logic in wasi-libc saves a tiny bit of code, at the
expense of link-time trouble whenever GHC links a wasm module without
-no-hs-main, in which case the driver-generated main function would
clash with the definition here, resulting in a linker error. It's
simply better to avoid messing with the main function, and it would
additionally allow linking wasm32-wasi command modules that does make
use of synchronous JSFFI.
- - - - -
5d59fc8f by Cheng Shao at 2025-09-28T19:26:27-04:00
rts: provide stub implementations of ExecPage functions for wasm
This patch provides stub implementations of ExecPage functions for
wasm. They are never actually invoked at runtime for any non-TNTC
platform, yet they can cause link-time errors of missing symbols when
the GHCi.InfoTable module gets linked into the final wasm module (e.g.
a GHC API program).
- - - - -
a4d664c7 by Cheng Shao at 2025-09-29T17:29:22+02:00
compiler/ghci: replace the LoadDLL message with LoadDLLs
As a part of #25407, this commit changes the LoadDLL message to
LoadDLLs, which takes a list of DLL paths to load and returns the list
of remote pointer handles. The wasm dyld is refactored to take
advantage of LoadDLLs and harvest background parallelism. On other
platforms, LoadDLLs is based on a fallback codepath that does
sequential loading.
The driver is not actually emitting singular LoadDLLs message with
multiple DLLs yet, this is left in subsequent commits.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
c7fc4bae by Cheng Shao at 2025-09-29T17:29:22+02:00
driver: separate downsweep/upsweep phase in loadPackages'
This commit refactors GHC.Linker.Loader.loadPackages' to be separated
into downsweep/upsweep phases:
- The downsweep phase performs dependency analysis and generates a
list of topologically sorted packages to load
- The upsweep phase sequentially loads these packages by calling
loadPackage
This is a necessary refactoring to make it possible to make loading of
DLLs concurrent.
- - - - -
ab180104 by Cheng Shao at 2025-09-29T17:57:19+02:00
driver: emit single LoadDLLs message to load multiple DLLs
This commit refactors the driver so that it emits a single LoadDLLs
message to load multiple DLLs in GHC.Linker.Loader.loadPackages'.
Closes #25407.
-------------------------
Metric Increase:
MultiLayerModulesTH_OneShot
TcPlugin_RewritePerf
-------------------------
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
9c304ec0 by Sean D. Gillespie at 2025-09-29T19:57:07-04:00
Fix SIZED_BIN_OP_TY_INT casts in RTS interpreter
Correct `SIZED_BIN_OP_TY_INT` cast to integer. Previously, it cast
its second operand as its parameter `ty`. This does not currently
cause any issues, since we are only using it for bit shifts.
Fixes #26287
- - - - -
a1de535f by Luite Stegeman at 2025-09-30T18:40:28-04:00
rts: Fix lost wakeups in threadPaused for threads blocked on black holes
The lazy blackholing code in threadPaused could overwrite closures
that were already eagerly blackholed, and as such wouldn't have a
marked update frame. If the black hole was overwritten by its
original owner, this would lead to an undetected collision, and
the contents of any existing blocking queue being lost.
This adds a check for eagerly blackholed closures and avoids
overwriting their contents.
Fixes #26324
- - - - -
b7e21e49 by Luite Stegeman at 2025-09-30T18:40:28-04:00
rts: push the correct update frame in stg_AP_STACK
The frame contains an eager black hole (__stg_EAGER_BLACKHOLE_info) so
we should push an stg_bh_upd_frame_info instead of an stg_upd_frame_info.
- - - - -
02a7c18a by Cheng Shao at 2025-09-30T18:41:27-04:00
ghci: fix lookupSymbolInDLL behavior on wasm
This patch fixes lookupSymbolInDLL behavior on wasm to return Nothing
instead of throwing. On wasm, we only have lookupSymbol, and the
driver would attempt to call lookupSymbolInDLL first before falling
back to lookupSymbol, so lookupSymbolInDLL needs to return Nothing
gracefully for the fallback behavior to work.
- - - - -
aa0ca5e3 by Cheng Shao at 2025-09-30T18:41:27-04:00
hadrian/compiler: enable internal-interpreter for ghc library in wasm stage1
This commit enables the internal-interpreter flag for ghc library in
wasm stage1, as well as other minor adjustments to make it actually
possible to launch a ghc api session that makes use of the internal
interpreter. Closes #26431 #25400.
- - - - -
69503668 by Cheng Shao at 2025-09-30T18:41:27-04:00
testsuite: add T26431 test case
This commit adds T26431 to testsuite/tests/ghci-wasm which goes
through the complete bytecode compilation/linking/running pipeline in
wasm, so to witness that the ghc shared library in wasm have full
support for internal-interpreter.
- - - - -
e9445c01 by Matthew Pickering at 2025-09-30T18:42:23-04:00
driver: Load bytecode static pointer entries during linking
Previously the entries were loaded too eagerly, during upsweep, but we
should delay loading them until we know that the relevant bytecode
object is demanded.
Towards #25230
- - - - -
b8307eab by Cheng Shao at 2025-09-30T18:43:14-04:00
autoconf/ghc-toolchain: remove obsolete C99 check
This patch removes obsolete c99 check from autoconf/ghc-toolchain. For
all toolchain & platform combination we support, gnu11 or above is
already supported without any -std flag required, and our RTS already
required C11 quite a few years ago, so the C99 check is completely
pointless.
- - - - -
9c293544 by Simon Peyton Jones at 2025-10-01T09:36:10+01:00
Fix buglet in GHC.Core.Unify.uVarOrFam
We were failing to match two totally-equal types!
This led to #26457.
- - - - -
554487a7 by Rodrigo Mesquita at 2025-10-01T23:04:43-04:00
cleanup: Drop obsolete comment about HsConDetails
HsConDetails used to have an argument representing the type of the
tyargs in a list:
data HsConDetails tyarg arg rec
= PrefixCon [tyarg] [arg]
This datatype was shared across 3 synonyms: HsConPatDetails,
HsConDeclH98Details, HsPatSynDetails. In the latter two cases, `tyarg`
was instanced to `Void` meaning the list was always empty for these
cases.
In 7b84c58867edca57a45945a20a9391724db6d9e4, this was refactored such
that HsConDetails no longer needs a type of tyargs by construction. The
first case now represents the type arguments in the args type itself,
with something like:
ConPat "MkE" [InvisP tp1, InvisP tp2, p1, p2]
So the deleted comment really is just obsolete.
Fixes #26461
- - - - -
6992ac09 by Cheng Shao at 2025-10-02T07:27:55-04:00
testsuite: remove unused expected output files
This patch removes unused expected output files in the testsuites on
platforms that we no longer support.
- - - - -
39eaaaba by Ben Gamari at 2025-10-02T07:28:45-04:00
rts: Dynamically initialize built-in closures
To resolve #26166 we need to eliminate references to undefined symbols
in the runtime system. One such source of these is the runtime's
static references to `I#` and `C#` due the `stg_INTLIKE` and
`stg_CHARLIKE` arrays.
To avoid this we make these dynamic, initializing them during RTS
start-up.
- - - - -
c254c54b by Cheng Shao at 2025-10-02T07:29:33-04:00
compiler: only invoke keepCAFsForGHCi if internal-interpreter is enabled
This patch makes the ghc library only invoke keepCAFsForGHCi if
internal-interpreter is enabled. For cases when it's not (e.g. the
host build of a cross ghc), this avoids unnecessarily retaining all
CAFs in the heap. Also fixes the type signature of c_keepCAFsForGHCi
to match the C ABI.
- - - - -
c9ec4d43 by Simon Hengel at 2025-10-02T18:42:20-04:00
Update copyright in documentation
- - - - -
da9633a9 by Matthew Pickering at 2025-10-02T18:43:04-04:00
loader: Unify loadDecls and loadModuleLinkables functions
These two functions nearly did the same thing. I have refactored them so
that `loadDecls` now calls `loadModuleLinkables`.
Fixes #26459
- - - - -
5db98d80 by Simon Hengel at 2025-10-02T18:43:53-04:00
Fix typo
- - - - -
1275d360 by Matthew Pickering at 2025-10-03T06:05:56-04:00
testsuite: Use ghci_ways to set ways in PackedDataCon/UnboxedTuples/UnliftedDataTypeInterp tests
These tests reimplemented the logic from `valid_way` in order to
determine what ways to run. It's easier to use this combination of
`only_ways` and `extra_ways` to only run in GHCi ways and always run in
GHCi ways.
- - - - -
c06b534b by Matthew Pickering at 2025-10-03T06:06:40-04:00
Rename interpreterBackend to bytecodeBackend
This is preparation for creating bytecode files.
The "interpreter" is one way in which we can run bytecode objects. It is
more accurate to describe that the backend produces bytecode, rather
than the means by which the code will eventually run.
The "interpreterBackend" binding is left as a deprecated alias.
- - - - -
41bdb16f by Andreas Klebinger at 2025-10-06T18:04:34-04:00
Add a perf test for #26425
- - - - -
1da0c700 by Andreas Klebinger at 2025-10-06T18:05:14-04:00
Testsuite: Silence warnings about Wx-partial in concprog001
- - - - -
7471eb6a by sheaf at 2025-10-07T21:39:43-04:00
Improve how we detect user type errors in types
This commit cleans up all the code responsible for detecting whether a
type contains "TypeError msg" applications nested inside it. All the
logic is now in 'userTypeError_maybe', which is always deep. Whether
it looks inside type family applications is determined by the passed-in
boolean flag:
- When deciding whether a constraint is definitely insoluble, don't
look inside type family applications, as they may still reduce -- in
which case the TypeError could disappear.
- When reporting unsolved constraints, look inside type family
applications: they had the chance to reduce but didn't, and the
custom type error might contain valuable information.
All the details are explained in Note [Custom type errors in constraints]
in GHC.Tc.Types.Constraint.
Another benefit of this change is that it allows us to get rid of the
deeply dodgy 'getUserTypeErrorMsg' function.
This commit also improves the detection of custom type errors, for
example in equality constraints:
TypeError blah ~# rhs
It used to be the case that we didn't detect the TypeError on the LHS,
because we never considered that equality constraints could be insoluble
due to the presence of custom type errors. Addressing this oversight
improves detection of redundant pattern match warnings, fixing #26400.
- - - - -
29955267 by Rodrigo Mesquita at 2025-10-07T21:40:25-04:00
cleanup: Drop obsolete settings from config.mk.in
These values used to be spliced into the bindist's `config.mk` s.t. when
`make` was run, the values were read and written into the bindist installation `settings` file.
However, we now carry these values to the bindist directly in the
default.target toolchain file, and `make` writes almost nothing to
`settings` now (see #26227)
The entries deleted in this MR were already unused.
Fixes #26478
- - - - -
f7adfed2 by ARATA Mizuki at 2025-10-08T08:37:24-04:00
T22033 is only relevant if the word size is 64-bit
Fixes #25497
- - - - -
ff1650c9 by Ben Gamari at 2025-10-08T08:38:07-04:00
rts/posix: Enforce iteration limit on heap reservation logic
Previously we could loop indefinitely when attempting to get an address
space reservation for our heap. Limit the logic to 8 iterations to
ensure we instead issue a reasonable error message.
Addresses #26151.
- - - - -
01844557 by Ben Gamari at 2025-10-08T08:38:07-04:00
rts/posix: Hold on to low reservations when reserving heap
Previously when the OS gave us an address space reservation in low
memory we would immediately release it and try again. However, on some
platforms this meant that we would get the same allocation again in the
next iteration (since mmap's `hint` argument is just that, a hint).
Instead we now hold on to low reservations until we have found a
suitable heap reservation.
Fixes #26151.
- - - - -
b2c8d052 by Sven Tennie at 2025-10-08T08:38:47-04:00
Build terminfo only in upper stages in cross-builds (#26288)
Currently, there's no way to provide library paths for [n]curses for
both - build and target - in cross-builds. As stage0 is only used to
build upper stages, it should be fine to build terminfo only for them.
This re-enables building cross-compilers with terminfo.
- - - - -
c58f9a61 by Julian Ospald at 2025-10-08T08:39:36-04:00
ghc-toolchain: Drop `ld.gold` from merge object command
It's deprecated.
Also see #25716
- - - - -
2b8baada by sheaf at 2025-10-08T18:23:37-04:00
Improvements to 'mayLookIdentical'
This commit makes significant improvements to the machinery that decides
when we should pretty-print the "invisible bits" of a type, such as:
- kind applications, e.g. '@k' in 'Proxy @k ty'
- RuntimeReps, e.g. 'TYPE r'
- multiplicities and linear arrows 'a %1 -> b'
To do this, this commit refactors 'mayLookIdentical' to return **which**
of the invisible bits don't match up, e.g. in
(a %1 -> b) ~ (a %Many -> b)
we find that the invisible bit that doesn't match up is a multiplicity,
so we should set 'sdocLinearTypes = True' when pretty-printing, and with
e.g.
Proxy @k1 ~ Proxy @k2
we find that the invisible bit that doesn't match up is an invisible
TyCon argument, so we set 'sdocPrintExplicitKinds = True'.
We leverage these changes to remove the ad-hoc treatment of linearity
of data constructors with 'dataConDisplayType' and 'dataConNonLinearType'.
This is now handled by the machinery of 'pprWithInvisibleBits'.
Fixes #26335 #26340
- - - - -
129ce32d by sheaf at 2025-10-08T18:23:37-04:00
Store SDoc context in SourceError
This commits modifies the SourceError datatype which is used for
throwing and then reporting exceptions by storing all the info we need
to be able to print the SDoc, including whether we should print with
explicit kinds, explicit runtime-reps, etc.
This is done using the new datatype:
data SourceErrorContext
= SEC
!DiagOpts
!(DiagnosticOpts GhcMessage)
Now, when we come to report an error (by handling the exception), we
have access to the full context we need.
Fixes #26387
- - - - -
f9790ca8 by Ben Gamari at 2025-10-08T18:24:19-04:00
gitlab-ci: Make RELEASE_JOB an input
Rather than an undocumented variable.
- - - - -
14281a22 by Ben Gamari at 2025-10-11T14:06:47-04:00
rts/nonmoving: Fix comment spelling
- - - - -
bedd38b0 by Ben Gamari at 2025-10-11T14:06:47-04:00
rts/nonmoving: Use atomic operations to update bd->flags
- - - - -
215d6841 by Ben Gamari at 2025-10-11T14:06:47-04:00
nonmoving: Use get_itbl instead of explicit loads
This is cleaner and also fixes unnecessary (and unsound) use of
`volatile`.
- - - - -
2c94aa3a by Ben Gamari at 2025-10-11T14:06:47-04:00
rts/Scav: Handle WHITEHOLEs in scavenge_one
`scavenge_one`, used to scavenge mutable list entries, may encounter
`WHITEHOLE`s when the non-moving GC is in use via two paths:
1. when an MVAR is being marked concurrently
2. when the object belongs to a chain of selectors being short-cutted.
Fixes #26204.
- - - - -
6bd8155c by Matthew Pickering at 2025-10-11T14:07:29-04:00
Add support for generating bytecode objects
This commit adds the `-fwrite-byte-code` option which makes GHC emit a
`.gbc` file which contains a serialised representation of bytecode.
The bytecode can be loaded by the compiler to avoid having to
reinterpret a module when using the bytecode interpreter (for example,
in GHCi).
There are also the new options:
* -gbcdir=<DIR>: Specify the directory to place the gbc files
* -gbcsuf=<suffix>: Specify the suffix for gbc files
The option `-fbyte-code-and-object-code` now implies
`-fwrite-byte-code`.
These performance tests fail due to https://github.com/haskell/directory/issues/204
-------------------------
Metric Increase:
MultiComponentModules
MultiLayerModules
MultiComponentModulesRecomp
MultiLayerModulesRecomp
MultiLayerModulesTH_Make
MultiLayerModulesTH_OneShot
T13701
-------------------------
The bytecode serialisation part was implemented by Cheng Shao
Co-authored-by: Cheng Shao <terrorjack(a)type.dance>
- - - - -
dc8f9599 by Matthew Pickering at 2025-10-11T14:07:30-04:00
Revert "Add a perf test for #26425"
This test has a large memory spike currently, which makes the test
sensitive, since if you allocate a little more or less, the precise
location where GC happens shifts and you observe a different part of the
spike.
Andreas told me to revert the patch for now, and he will add it back
when he fixes the memory spike.
This reverts commit 41bdb16fd083110a06507248f648c507a2feb4af.
- - - - -
e10dcd65 by Sven Tennie at 2025-10-12T10:24:56+00:00
T22859: Increase threadDelay for small machines
The previously used thread delay led to failures on my RISC-V test
setups.
- - - - -
d59ef6b6 by Hai / @BestYeen at 2025-10-14T21:51:14-04:00
Change Alex and Happy m4 scripts to display which version was found in the system, adapt small formatting details in Happy script to be more like the Alex script again.
- - - - -
c98abb6a by Hai / @BestYeen at 2025-10-14T21:52:08-04:00
Update occurrences of return to pure and add a sample for redefining :m to mean :main
- - - - -
70ee825a by Cheng Shao at 2025-10-14T21:52:50-04:00
testsuite: fix T3586 for non-SSE3 platforms
`T3586.hs` contains `-fvia-C -optc-msse3` which I think is a
best-effort basis to harvest the C compiler's auto vectorization
optimizations via the C backend back when the test was added. The
`-fvia-C` part is now a deprecated no-op because GHC can't fall back
to the C backend on a non-unregisterised build, and `-optc-msse3`
might actually cause the test to fail on non x86/x64 platforms, e.g.
recent builds of wasi-sdk would report `wasm32-wasi-clang: error:
unsupported option '-msse3' for target 'wasm32-unknown-wasi'`.
So this patch cleans up this historical cruft. `-fvia-C` is removed,
and `-optc-msse3` is only passed when cpuid contains `pni` (which
indicates support of SSE3).
- - - - -
4be32153 by Teo Camarasu at 2025-10-15T08:06:09-04:00
Add submodules for template-haskell-lift and template-haskell-quasiquoter
These two new boot libraries expose stable subsets of the
template-haskell interface.
This is an implemenation of the GHC proposal https://github.com/ghc-proposals/ghc-proposals/pull/696
Work towards #25262
- - - - -
0c00c9c3 by Ben Gamari at 2025-10-15T08:06:51-04:00
rts: Eliminate uses of implicit constant arrays
Folding of `const`-sized variable-length arrays to a constant-length
array is a gnu extension which clang complains about.
Closes #26502.
- - - - -
bf902a1d by Fendor at 2025-10-15T16:00:59-04:00
Refactor distinct constructor tables map construction
Adds `GHC.Types.Unique.FM.alterUFM_L`, `GHC.Types.Unique.DFM.alterUDFM_L`
`GHC.Data.Word64Map.alterLookup` to support fusion of distinct
constructor data insertion and lookup during the construction of the `DataCon`
map in `GHC.Stg.Debug.numberDataCon`.
Co-authored-by: Fendor <fendor(a)posteo.de>
Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com>
- - - - -
b3585ba1 by Fendor at 2025-10-15T16:00:59-04:00
Allow per constructor refinement of distinct-constructor-tables
Introduce `-fno-distinct-constructor-tables`. A distinct constructor table
configuration is built from the combination of flags given, in order. For
example, to only generate distinct constructor tables for a few specific
constructors and no others, just pass
`-fdistinct-constructor-tables-only=C1,...,CN`.
This flag can be supplied multiple times to extend the set of
constructors to generate a distinct info table for.
You can disable generation of distinct constructor tables for all
configurations by passing `-fno-distinct-constructor-tables`.
The various configurations of these flags is included in the `DynFlags`
fingerprints, which should result in the expected recompilation logic.
Adds a test that checks for distinct tables for various given or omitted
constructors.
Updates CountDepsAst and CountDepsParser tests to account for new dependencies.
Fixes #23703
Co-authored-by: Fendor <fendor(a)posteo.de>
Co-authored-by: Finley McIlwaine <finleymcilwaine(a)gmail.com>
- - - - -
e17dc695 by fendor at 2025-10-15T16:01:41-04:00
Fix typos in haddock documentation for stack annotation API
- - - - -
f85058d3 by Zubin Duggal at 2025-10-17T13:50:52+05:30
compiler: Attempt to systematize Unique tags by introducing an ADT for each different tag
Fixes #26264
Metric Decrease:
T9233
- - - - -
c85c845d by sheaf at 2025-10-17T22:35:32-04:00
Don't prematurely final-zonk PatSyn declarations
This commit makes GHC hold off on the final zonk for pattern synonym
declarations, in 'GHC.Tc.TyCl.PatSyn.tc_patsyn_finish'.
This accommodates the fact that pattern synonym declarations without a
type signature can contain unfilled metavariables, e.g. if the RHS of
the pattern synonym involves view-patterns whose type mentions promoted
(level 0) metavariables. Just like we do for ordinary function bindings,
we should allow these metavariables to be settled later, instead of
eagerly performing a final zonk-to-type.
Now, the final zonking-to-type for pattern synonyms is performed in
GHC.Tc.Module.zonkTcGblEnv.
Fixes #26465
- - - - -
ba3e5bdd by Rodrigo Mesquita at 2025-10-18T16:57:18-04:00
Move code-gen aux symbols from ghc-internal to rts
These symbols were all previously defined in ghc-internal and made the
dependency structure awkward, where the rts may refer to some of these
symbols and had to work around that circular dependency the way
described in #26166.
Moreover, the code generator will produce code that uses these symbols!
Therefore, they should be available in the rts:
PRINCIPLE: If the code generator may produce code which uses this
symbol, then it should be defined in the rts rather than, say,
ghc-internal.
That said, the main motivation is towards fixing #26166.
Towards #26166. Pre-requisite of !14892
- - - - -
f31de2a9 by Ben Gamari at 2025-10-18T16:57:18-04:00
rts: Avoid static symbol references to ghc-internal
This resolves #26166, a bug due to new constraints placed by Apple's
linker on undefined references.
One source of such references in the RTS is the many symbols referenced
in ghc-internal. To mitigate #26166, we make these references dynamic,
as described in Note [RTS/ghc-internal interface].
Fixes #26166
Co-authored-by: Rodrigo Mesquita <rodrigo.m.mesquita(a)gmail.com>
Co-authored-by: Cheng Shao <terrorjack(a)type.dance>
- - - - -
43fdfddc by Ben Gamari at 2025-10-18T16:57:18-04:00
compiler: Rename isMathFun -> isLibcFun
This set includes more than just math functions.
- - - - -
4ed5138f by Ben Gamari at 2025-10-18T16:57:18-04:00
compiler: Add libc allocator functions to libc_funs
Prototypes for these are now visible from `Prim.h`, resulting in
multiple-declaration warnings in the unregisterised job.
- - - - -
9a0a076b by Ben Gamari at 2025-10-18T16:57:18-04:00
rts: Minimize header dependencies of Prim.h
Otherwise we will end up with redundant and incompatible declarations
resulting in warnings during the unregisterised build.
- - - - -
26b8a414 by Diego Antonio Rosario Palomino at 2025-10-18T16:58:10-04:00
Cmm Parser: Fix incorrect example in comment
The Parser.y file contains a comment with an incorrect example of textual
Cmm (used in .cmm files). This commit updates the comment to ensure it
reflects valid textual Cmm syntax.
Fixes #26313
- - - - -
d4a9d6d6 by ARATA Mizuki at 2025-10-19T18:43:47+09:00
Handle implications between x86 feature flags
This includes:
* Multiple -msse* options can be specified
* -mavx implies -msse4.2
* -mavx2 implies -mavx
* -mfma implies -mavx
* -mavx512f implies -mavx2 and -mfma
* -mavx512{cd,er,pf} imply -mavx512f
Closes #24989
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
c9b8465c by Cheng Shao at 2025-10-20T10:16:00-04:00
wasm: workaround WebKit bug in dyld
This patch works around a WebKit bug and allows dyld to run on WebKit
based platforms as well. See added note for detailed explanation.
Co-authored-by: Codex <codex(a)openai.com>
- - - - -
91b6be10 by Julian Ospald at 2025-10-20T18:21:03-04:00
Improve error handling in 'getPackageArchives'
When the library dirs in the package conf files are not set up correctly,
the JS linker will happily ignore such packages and not link against them,
although they're part of the link plan.
Fixes #26383
- - - - -
6c5269da by Sven Tennie at 2025-10-20T18:21:44-04:00
Align coding style
Improve readability by using the same style for all constructor calls in
this function.
- - - - -
3d305889 by Sven Tennie at 2025-10-20T18:21:44-04:00
Reduce complexity by removing joins with mempty
ldArgs, cArgs and cppArgs are all `mempty`. Thus concatenating them adds
nothing but some complexity while reading the code.
- - - - -
38d65187 by Matthew Pickering at 2025-10-21T13:12:20+01:00
Fix stack decoding when using profiled runtime
There are three fixes in this commit.
* We need to replicate the `InfoTable` and `InfoTableProf`
approach for the other stack constants (see the new Stack.ConstantsProf
file).
* Then we need to appropiately import the profiled or non-profiled
versions.
* Finally, there was an incorrect addition in `stackFrameSize`. We need
to cast after performing addition on words.
Fixes #26507
- - - - -
17231bfb by fendor at 2025-10-21T13:12:20+01:00
Add regression test for #26507
- - - - -
4f5bf93b by Simon Peyton Jones at 2025-10-25T04:05:34-04:00
Postscript to fix for #26255
This MR has comments only
- - - - -
6ef22fa0 by IC Rainbow at 2025-10-26T18:23:01-04:00
Add SIMD primops for bitwise logical operations
This adds 128-bit wide and/or/xor instructions for X86 NCG,
with both SSE and AVX encodings.
```
andFloatX4# :: FloatX4# -> FloatX4# -> FloatX4# -- andps / vandps
andDoubleX2# :: DoubleX2# -> DoubleX2# -> DoubleX2# -- andpd / vandpd
andInt8X16# :: Int8X16# -> Int8X16# -> Int8X16# -- pand / vpand
```
The new primops are available on ARM when using LLVM backend.
Tests added:
- simd015 (floats and doubles)
- simd016 (integers)
- simd017 (words)
Fixes #26417
- - - - -
fbdc623a by sheaf at 2025-10-26T18:23:52-04:00
Add hints for unsolved HasField constraints
This commit adds hints and explanations for unsolved 'HasField'
constraints.
GHC will now provide additional explanations for an unsolved constraint
of the form 'HasField fld_name rec_ty fld_ty'; the details are laid out in
Note [Error messages for unsolved HasField constraints], but briefly:
1. Provide similar name suggestions (e.g. mis-spelled field name)
and import suggestions (record field not in scope).
These result in actionable 'GhcHints', which is helpful to provide
code actions in HLS.
2. Explain why GHC did not solve the constraint, e.g.:
- 'fld_name' is not a string literal (e.g. a type variable)
- 'rec_ty' is a TyCon without any fields, e.g. 'Int' or 'Bool'.
- 'fld_ty' contains existentials variables or foralls.
- The record field is a pattern synonym field (GHC does not generate
HasField instances for those).
- 'HasField' is a custom 'TyCon', not actually the built-in
'HasField' typeclass from 'GHC.Records'.
On the way, we slightly refactor the mechanisms for import suggestions
in GHC.Rename.Unbound. This is to account for the fact that, for
'HasField', we don't care whether the field is imported qualified or
unqualified. 'importSuggestions' was refactored, we now have
'sameQualImportSuggestions' and 'anyQualImportSuggestions'.
Fixes #18776 #22382 #26480
- - - - -
99d5707f by sheaf at 2025-10-26T18:23:52-04:00
Rename PatSyn MatchContext to PatSynCtx to avoid punning
- - - - -
5dc2e9ea by Julian Ospald at 2025-10-27T18:17:23-04:00
Skip uniques test if sources are not available
- - - - -
544b9ec9 by Vladislav Zavialov at 2025-10-27T18:18:06-04:00
Re-export GHC.Hs.Basic from GHC.Hs
Clean up some import sections in GHC by re-exporting GHC.Hs.Basic
from GHC.Hs.
- - - - -
643ce801 by Julian Ospald at 2025-10-28T18:18:55-04:00
rts: remove unneccesary cabal flags
We perform those checks via proper autoconf macros
instead that do the right thing and then add those
libs to the rts buildinfo.
- - - - -
d69ea8fe by Vladislav Zavialov at 2025-10-28T18:19:37-04:00
Test case for #17705
Starting with GHC 9.12 (the first release to include 5745dbd3),
all examples in this ticket are handled as expected.
- - - - -
4038a28b by Andreas Klebinger at 2025-10-30T12:38:52-04:00
Add a perf test for #26425
- - - - -
f997618e by Andreas Klebinger at 2025-10-30T12:38:52-04:00
OccAnal: Be stricter for better compiler perf.
In particular we are now stricter:
* When combining usageDetails.
* When computing binder info.
In combineUsageDetails when combining the underlying adds we compute a
new `LocalOcc` for each entry by combining the two existing ones.
Rather than wait for those entries to be forced down the road we now
force them immediately. Speeding up T26425 by about 10% with little
effect on the common case.
We also force binders we put into the Core AST everywhere now.
Failure to do so risks leaking the occ env used to set the binders
OccInfo.
For T26425 compiler residency went down by a factor of ~10x.
Compile time also improved by a factor of ~1.6.
-------------------------
Metric Decrease:
T18698a
T26425
T9233
-------------------------
- - - - -
5618645b by Vladislav Zavialov at 2025-10-30T12:39:33-04:00
Fix namespace specifiers in subordinate exports (#12488)
This patch fixes an oversight in the `lookupChildrenExport` function that
caused explicit namespace specifiers of subordinate export items to be
ignored:
module M (T (type A)) where -- should be rejected
data T = A
Based on the `IEWrappedName` data type, there are 5 cases to consider:
1. Unadorned name: P(X)
2. Named default: P(default X)
3. Pattern synonym: P(pattern X)
4. Type name: P(type X)
5. Data name: P(data X)
Case 1 is already handled correctly; cases 2 and 3 are parse errors; and
it is cases 4 and 5 that we are concerned with in this patch.
Following the precedent established in `LookupExactName`, we introduce
a boolean flag in `LookupChildren` to control whether to look up in all
namespaces or in a specific one. If an export item is accompanied by an
explicit namespace specifier `type` or `data`, we restrict the lookup in
`lookupGRE` to a specific namespace.
The newly introduced diagnostic `TcRnExportedSubordinateNotFound`
provides error messages and suggestions more tailored to this context
than the previously used `reportUnboundName`.
- - - - -
f75ab223 by Peter Trommler at 2025-10-31T18:43:13-04:00
ghc-toolchain: detect PowerPC 64 bit ABI
Check preprocessor macro defined for ABI v2 and assume v1 otherwise.
Fixes #26521
- - - - -
d086c474 by Peter Trommler at 2025-10-31T18:43:13-04:00
ghc-toolchain: refactor, move lastLine to Utils
- - - - -
995dfe0d by Vladislav Zavialov at 2025-10-31T18:43:54-04:00
Tests for -Wduplicate-exports, -Wdodgy-exports
Add test cases for the previously untested diagnostics:
[GHC-51876] TcRnDupeModuleExport
[GHC-64649] TcRnNullExportedModule
This also revealed a typo (incorrect capitalization of "module") in the
warning text for TcRnDupeModuleExport, which is now fixed.
- - - - -
f6961b02 by Cheng Shao at 2025-11-01T00:08:01+01:00
wasm: reformat dyld source code
This commit reformats dyld source code with prettier, to avoid
introducing unnecessary diffs in subsequent patches when they're
formatted before committing.
- - - - -
0c9032a0 by Cheng Shao at 2025-11-01T00:08:01+01:00
wasm: simplify _initialize logic in dyld
This commit simplifies how we _initialize a wasm shared library in
dyld and removes special treatment for libc.so, see added comment for
detailed explanation.
- - - - -
ec1b40bd by Cheng Shao at 2025-11-01T00:08:01+01:00
wasm: support running dyld fully client side in the browser
This commit refactors the wasm dyld script so that it can be used to
load and run wasm shared libraries fully client-side in the browser
without needing a wasm32-wasi-ghci backend:
- A new `DyLDBrowserHost` class is exported, which runs in the browser
and uses the in-memory vfs without any RPC calls. This meant to be
used to create a `rpc` object for the fully client side use cases.
- The exported `main` function now can be used to load user-specified
shared libraries, and the user can use the returned `DyLD` instance
to run their own exported Haskell functions.
- The in-browser wasi implementation is switched to
https://github.com/haskell-wasm/browser_wasi_shim for bugfixes and
major performance improvements not landed upstream yet.
- When being run by deno, it now correctly switches to non-nodejs code
paths, so it's more convenient to test dyld logic with deno.
See added comments for details, as well as the added `playground001`
test case for an example of using it to build an in-browser Haskell
playground.
- - - - -
8f3e481f by Cheng Shao at 2025-11-01T00:08:01+01:00
testsuite: add playground001 to test haskell playground
This commit adds the playground001 test case to test the haskell
playground in browser, see comments for details.
- - - - -
af40606a by Cheng Shao at 2025-11-01T00:08:04+01:00
Revert "testsuite: add T26431 test case"
This reverts commit 695036686f8c6d78611edf3ed627608d94def6b7. T26431
is now retired, wasm ghc internal-interpreter logic is tested by
playground001.
- - - - -
86c82745 by Vladislav Zavialov at 2025-11-01T07:24:29-04:00
Supplant TcRnExportHiddenComponents with TcRnDodgyExports (#26534)
Remove a bogus special case in lookup_ie_kids_all,
making TcRnExportHiddenComponents obsolete.
- - - - -
fcf6331e by Richard Eisenberg at 2025-11-03T08:33:05+00:00
Refactor fundep solving
This commit is a large-scale refactor of the increasingly-messy code that
handles functional dependencies. It has virtually no effect on what compiles
but improves error messages a bit. And it does the groundwork for #23162.
The big picture is described in
Note [Overview of functional dependencies in type inference]
in GHC.Tc.Solver.FunDeps
* New module GHC.Tc.Solver.FunDeps contains all the fundep-handling
code for the constraint solver.
* Fundep-equalities are solved in a nested scope; they may generate
unifications but otherwise have no other effect.
See GHC.Tc.Solver.FunDeps.solveFunDeps
The nested needs to start from the Givens in the inert set, but
not the Wanteds; hence a new function `resetInertCans`, used in
`nestFunDepsTcS`.
* That in turn means that fundep equalities never show up in error
messages, so the complicated FunDepOrigin tracking can all disappear.
* We need to be careful about tracking unifications, so we kick out
constraints from the inert set after doing unifications. Unification
tracking has been majorly reformed: see Note [WhatUnifications] in
GHC.Tc.Utils.Unify.
A good consequence is that the hard-to-grok `resetUnificationFlag`
has been replaced with a simpler use of
`reportCoarseGrainUnifications`
Smaller things:
* Rename `FunDepEqn` to `FunDepEqns` since it contains multiple
type equalities.
Some compile time improvement
Metrics: compile_time/bytes allocated
Baseline
Test value New value Change
---------------------- --------------------------------------
T5030(normal) 173,839,232 148,115,248 -14.8% GOOD
hard_hole_fits(normal) 286,768,048 284,015,416 -1.0%
geo. mean -0.2%
minimum -14.8%
maximum +0.3%
Metric Decrease:
T5030
- - - - -
231adc30 by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
QuickLook's tcInstFun should make instantiation variables directly
tcInstFun must make "instantiation variables", not regular
unification variables, when instantiating function types. That was
previously implemented by a hack: set the /ambient/ level to QLInstTyVar.
But the hack finally bit me, when I was refactoring WhatUnifications.
And it was always wrong: see the now-expunged (TCAPP2) note.
This commit does it right, by making tcInstFun call its own
instantiation functions. That entails a small bit of duplication,
but the result is much, much cleaner.
- - - - -
39d4a24b by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Build implication for constraints from (static e)
This commit addresses #26466, by buiding an implication for the
constraints arising from a (static e) form. The implication has
a special ic_info field of StaticFormSkol, which tells the constraint
solver to use an empty set of Givens.
See (SF3) in Note [Grand plan for static forms]
in GHC.Iface.Tidy.StaticPtrTable
This commit also reinstates an `assert` in GHC.Tc.Solver.Equality.
The test `StaticPtrTypeFamily` was failing with an assertion failure,
but it now works.
- - - - -
2e2aec1e by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Comments about defaulting representation equalities
- - - - -
52a4d1da by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Improve tracking of rewriter-sets
This refactor substantially improves the treatment of so-called
"rewriter-sets" in the constraint solver.
The story is described in the rewritten
Note [Wanteds rewrite Wanteds: rewriter-sets]
in GHC.Tc.Types.Constraint
Some highlights
* Trace the free coercion holes of a filled CoercionHole,
in CoercionPlusHoles. See Note [Coercion holes] (COH5)
This avoids taking having to take the free coercion variables
of a coercion when zonking a rewrriter-set
* Many knock on changes
* Make fillCoercionHole take CoercionPlusHoles as its argument
rather than to separate arguments.
* Similarly setEqIfWanted, setWantedE, wrapUnifierAndEmit.
* Be more careful about passing the correct CoHoleSet to
`rewriteEqEvidence` and friends
* Make kickOurAfterFillingCoercionHole more clever. See
new Note [Kick out after filling a coercion hole]
Smaller matters
* Rename RewriterSet to CoHoleSet
* Add special-case helper `rewriteEqEvidenceSwapOnly`
- - - - -
3e78e1ba by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Tidy up constraint solving for foralls
* In `can_eq_nc_forall` make sure to track Givens that are used
in the nested solve step.
* Tiny missing-swap bug-fix in `lookup_eq_in_qcis`
* Fix some leftover mess from
commit 14123ee646f2b9738a917b7cec30f9d3941c13de
Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com>
Date: Wed Aug 20 00:35:48 2025 +0100
Solve forall-constraints via an implication, again
Specifically, trySolveImplication is now dead.
- - - - -
973f2c25 by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Do not treat CoercionHoles as free variables in coercions
This fixes a long-standing wart in the free-variable finder;
now CoercionHoles are no longer treated as a "free variable"
of a coercion.
I got big and unexpected performance regressions when making
this change. Turned out that CallArity didn't discover that
the free variable finder could be eta-expanded, which gave very
poor code.
So I re-used Note [The one-shot state monad trick] for Endo,
resulting in GHC.Utils.EndoOS. Very simple, big win.
- - - - -
c2b8a0f9 by Simon Peyton Jones at 2025-11-03T08:33:05+00:00
Update debug-tracing in CallArity
No effect on behaviour, and commented out anyway
- - - - -
9aa5ee99 by Simon Peyton Jones at 2025-11-03T08:33:28+00:00
Comments only -- remove dangling Note references
- - - - -
6683f183 by Simon Peyton Jones at 2025-11-03T08:33:28+00:00
Accept error message wibbles
- - - - -
3ba3d9f9 by Luite Stegeman at 2025-11-04T00:59:41-05:00
rts: fix eager black holes: record mutated closure and fix assertion
This fixes two problems with handling eager black holes, introduced
by a1de535f762bc23d4cf23a5b1853591dda12cdc9.
- the closure mutation must be recorded even for eager black holes,
since the mutator has mutated it before calling threadPaused
- The assertion that an unmarked eager black hole must be owned by
the TSO calling threadPaused is incorrect, since multiple threads
can race to claim the black hole.
fixes #26495
- - - - -
b5508f2c by Rodrigo Mesquita at 2025-11-04T14:10:56+00:00
build: Relax ghc/ghc-boot Cabal bound to 3.16
Fixes #26202
- - - - -
c5b3541f by Rodrigo Mesquita at 2025-11-04T14:10:56+00:00
cabal-reinstall: Use haddock-api +in-tree-ghc
Fixes #26202
- - - - -
c6d4b945 by Rodrigo Mesquita at 2025-11-04T14:10:56+00:00
cabal-reinstall: Pass --strict to Happy
This is necessary to make the generated Parser build successfully
This mimics Hadrian, which always passes --strict to happy.
Fixes #26202
- - - - -
79df1e0e by Rodrigo Mesquita at 2025-11-04T14:10:56+00:00
genprimopcode: Require higher happy version
I've bumped the happy version to forbid deprecated Happy versions which
don't successfully compile.
- - - - -
fa5d33de by Simon Peyton Jones at 2025-11-05T08:35:40-05:00
Add a HsWrapper optimiser
This MR addresses #26349, by introduceing optSubTypeHsWrapper.
There is a long
Note [Deep subsumption and WpSubType]
in GHC.Tc.Types.Evidence that explains what is going on.
- - - - -
ea58cae5 by Simon Peyton Jones at 2025-11-05T08:35:40-05:00
Improve mkWpFun_FRR
This commit ensures that `mkWpFun_FRR` directly produces a `FunCo` in
the cases where it can.
(Previously called `mkWpFun` which in turn optimised to a `FunCo`, but
that made the smarts in `mkWpFun` /essential/ rather than (as they
should be) optional.
- - - - -
5cdcfaed by Ben Gamari at 2025-11-06T09:01:36-05:00
compiler: Exclude units with no exposed modules from unused package check
Such packages cannot be "used" in the Haskell sense of the word yet
are nevertheless necessary as they may provide, e.g., C object code or
link flags.
Fixes #24120.
- - - - -
74b8397a by Brandon Chinn at 2025-11-06T09:02:19-05:00
Replace deprecated argparse.FileType
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36ddf988 by Ben Gamari at 2025-11-06T09:03:01-05:00
Bump unix submodule to 2.8.8.0
Closes #26474.
- - - - -
c32b3a29 by fendor at 2025-11-06T09:03:43-05:00
Fix assertion in `postStringLen` to account for \0 byte
We fix the assertion to handle trailing \0 bytes in `postStringLen`.
Before this change, the assertion looked like this:
ASSERT(eb->begin + eb->size > eb->pos + len + 1);
Let's assume some values to see why this is actually off by one:
eb->begin = 0
eb->size = 1
eb->pos = 0
len = 1
then the assertion would trigger correctly:
0 + 1 > 0 + 1 + 1 => 1 > 2 => false
as there is not enough space for the \0 byte (which is the trailing +1).
However, if we change `eb->size = 2`, then we do have enough space for a
string of length 1, but the assertion still fails:
0 + 2 > 0 + 1 + 1 => 2 > 2 => false
Which causes the assertion to fail if there is exactly enough space for
the string with a trailing \0 byte.
Clearly, the assertion should be `>=`!
If we switch around the operand, it should become more obvious that `<=`
is the correct comparison:
ASSERT(eb->pos + len + 1 <= eb->begin + eb->size);
This is expresses more naturally that the current position plus the
length of the string (and the null byte) must be smaller or equal to the
overall size of the buffer.
This change also is in line with the implementation in
`hasRoomForEvent` and `hasRoomForVariableEvent`:
```
StgBool hasRoomForEvent(EventsBuf *eb, EventTypeNum eNum)
{
uint32_t size = ...;
if (eb->pos + size > eb->begin + eb->size)
...
```
the check `eb->pos + size > eb->begin + eb->size` is identical to
`eb->pos + size <= eb->begin + eb->size` plus a negation.
- - - - -
3034a6f2 by Ben Gamari at 2025-11-06T09:04:24-05:00
Bump os-string submodule to 2.0.8
- - - - -
39567e85 by Cheng Shao at 2025-11-06T09:05:06-05:00
rts: use computed goto for instruction dispatch in the bytecode interpreter
This patch uses computed goto for instruction dispatch in the bytecode
interpreter. Previously instruction dispatch is done by a classic
switch loop, so executing the next instruction requires two jumps: one
to the start of the switch loop and another to the case block based on
the instruction tag. By using computed goto, we can build a jump table
consisted of code addresses indexed by the instruction tags
themselves, so executing the next instruction requires only one jump,
to the destination directly fetched from the jump table.
Closes #12953.
- - - - -
93fc7265 by sheaf at 2025-11-06T21:33:24-05:00
Correct hasFixedRuntimeRep in matchExpectedFunTys
This commit fixes a bug in the representation-polymormorphism check in
GHC.Tc.Utils.Unify.matchExpectedFunTys. The problem was that we put
the coercion resulting from hasFixedRuntimeRep in the wrong place,
leading to the Core Lint error reported in #26528.
The change is that we have to be careful when using 'mkWpFun': it
expects **both** the expected and actual argument types to have a
syntactically fixed RuntimeRep, as explained in Note [WpFun-FRR-INVARIANT]
in GHC.Tc.Types.Evidence.
On the way, this patch improves some of the commentary relating to
other usages of 'mkWpFun' in the compiler, in particular in the view
pattern case of 'tc_pat'. No functional changes, but some stylistic
changes to make the code more readable, and make it easier to understand
how we are upholding the WpFun-FRR-INVARIANT.
Fixes #26528
- - - - -
c052c724 by Simon Peyton Jones at 2025-11-06T21:34:06-05:00
Fix a horrible shadowing bug in implicit parameters
Fixes #26451. The change is in GHC.Tc.Solver.Monad.updInertDicts
where we now do /not/ delete /Wanted/ implicit-parameeter constraints.
This bug has been in GHC since 9.8! But it's quite hard to provoke;
I contructed a tests in T26451, but it was hard to do so.
- - - - -
b253013e by Georgios Karachalias at 2025-11-07T17:21:57-05:00
Remove the `CoreBindings` constructor from `LinkablePart`
Adjust HscRecompStatus to disallow unhydrated WholeCoreBindings
from being passed as input to getLinkDeps (which would previously
panic in this case).
Fixes #26497
- - - - -
ac7b737e by Sylvain Henry at 2025-11-07T17:22:51-05:00
Testsuite: pass ext-interp test way (#26552)
Note that some tests are still marked as broken with the ext-interp way
(see #26552 and #14335)
- - - - -
3c2f4bb4 by sheaf at 2025-11-11T11:47:28-05:00
Preserve user-written kinds in data declarations
This commit ensures that we preserve the user-written kind for data
declarations, e.g. in
type T2T = Type -> Type
type D :: T2T
data D a where { .. }
that we preserve the user-written kind of D as 'T2T', instead of
expanding the type synonym 'T2T' during kind checking.
We do this by storing 'tyConKind' separately from 'tyConResKind'. This
means that 'tyConKind' is not necessarily equal to
'mkTyConKind binders res_kind', as e.g. in the above example the former
is 'T2T' while the latter is 'Type -> Type'.
This is explained in Note [Preserve user-written TyCon kind] in GHC.Core.TyCon.
This is particularly important for Haddock, as the kinds stored in
interface files affect the generated documentation, and we want to
preserve the user-written types as much as possible.
- - - - -
19859584 by sheaf at 2025-11-11T11:47:28-05:00
Store user-written datacon tvs in interface files
This commit ensures we store the user-written quantified type variables
of data constructors in interface files, e.g. in
data D a where
MkD1 :: forall x. x -> D x
MkD2 :: forall u v. u -> v -> D v
The previous behaviour was to rename the universal variables to match
the universal variables of the data constructor. This was undesirable
because the names that end up in interface files end up mattering for
generated Haddock documentation; it's better to preserve the user-written
type variables.
Moreover, the universal variables may not have been user-written at all,
e.g. in an example such as:
type T2T = Type -> Type
data G :: T2T where
MkG :: forall x. D x
Here GHC will invent the type variable name 'a' for the first binder of
the TyCon G. We really don't want to then rename the user-written 'x'
into the generated 'a'.
- - - - -
034b2056 by sheaf at 2025-11-11T11:47:28-05:00
DataCon univ_tvs names: pick TyCon over inferred
This commit changes how we compute the names of universal type variables
in GADT data constructors. This augments the existing logic that chose
which type variable name to use, in GHC.Tc.TyCl.mkGADTVars. We continue
to prefer DataCon tv names for user-written binders, but we now prefer
TyCon tv names for inferred (non-user-written) DataCon binders.
This makes a difference in examples such as:
type (:~~:) :: k1 -> k2 -> Type
data a :~~: b where
HRefl :: a :~~: a
Before this patch, we ended up giving HRefl the type:
forall {k2}. forall (a :: k2). a :~~: a
whereas we now give it the type:
forall {k1}. forall (a :: k1). a :~~: a
The important part isn't really 'k1' or 'k2', but more that the inferred
type variable names of the DataCon can be arbitrary/unpredictable (as
they are chosen by GHC and depend on how unification proceeds), so it's
much better to use the more predictable TyCon type variable names.
- - - - -
95078d00 by sheaf at 2025-11-11T11:47:28-05:00
Backpack Rename: use explicit record construction
This commit updates the Backpack boilerplate in GHC.Iface.Rename to
use explicit record construction rather than record update. This makes
sure that the code stays up to date when the underlying constructors
change (e.g. new fields are added). The rationale is further explained
in Note [Prefer explicit record construction].
- - - - -
2bf36263 by sheaf at 2025-11-11T11:47:28-05:00
Store # eta binders in TyCon and use for Haddock
This commit stores the number of TyCon binders that were introduced by
eta-expansion (by the function GHC.Tc.Gen.HsType.splitTyConKind).
This is then used to pretty-print the TyCon as the user wrote it, e.g.
for
type Effect :: (Type -> Type) -> Type -> Type
data State s :: Effect where {..} -- arity 3
GHC will eta-expand the data declaration to
data State s a b where {..}
but also store in the 'TyCon' that the number of binders introduced by
this eta expansion is 2. This allows us, in
'Haddock.Convert.synifyTyConKindSig', to recover the original user-written
syntax, preserving the user's intent in Haddock documentation.
See Note [Inline kind signatures with GADTSyntax] in Haddock.Convert.
- - - - -
6c91582f by Matthew Pickering at 2025-11-11T11:48:12-05:00
driver: Properly handle errors during LinkNode steps
Previously we were not properly catching errors during the LinkNode step
(see T9930fail test).
This is fixed by wrapping the `LinkNode` action in `wrapAction`, the
same handler which is used for module compilation.
Fixes #26496
- - - - -
e1e1eb32 by Matthew Pickering at 2025-11-11T11:48:54-05:00
driver: Remove unecessary call to hscInsertHPT
This call was left-over from e9445c013fbccf9318739ca3d095a3e0a2e1be8a
If you follow the functions which call `upsweep_mod`, they immediately
add the interface to the HomePackageTable when `upsweep_mod` returns.
- - - - -
b22777d4 by ARATA Mizuki at 2025-11-11T11:49:44-05:00
LLVM backend: Pass the +evex512 attribute to LLVM 18+ if -mavx512f is set
The newer LLVM requires the +evex512 attribute to enable use of ZMM registers.
LLVM exhibits a backward-compatible behavior if the cpu is `x86-64`, but not if `penryn`.
Therefore, on macOS, where the cpu is set to `penryn`, we need to explicitly pass +evex512.
Fixes #26410
- - - - -
6ead7d06 by Vladislav Zavialov at 2025-11-11T11:50:26-05:00
Comments only in GHC.Parser.PostProcess.Haddock
Remove outdated Note [Register keyword location], as the issue it describes
was addressed by commit 05eb50dff2fcc78d025e77b9418ddb369db49b9f.
- - - - -
43fa8be8 by sheaf at 2025-11-11T11:51:18-05:00
localRegistersConflict: account for assignment LHS
This commit fixes a serious oversight in GHC.Cmm.Sink.conflicts,
specifically the code that computes which local registers conflict
between an assignment and a Cmm statement.
If we have:
assignment: <local_reg> = <expr>
node: <local_reg> = <other_expr>
then clearly the two conflict, because we cannot move one statement past
the other, as they assign two different values to the same local
register. (Recall that 'conflicts (local_reg,expr) node' is False if and
only if the assignment 'local_reg = expr' can be safely commuted past
the statement 'node'.)
The fix is to update 'GHC.Cmm.Sink.localRegistersConflict' to take into
account the following two situations:
(1) 'node' defines the LHS local register of the assignment,
(2) 'node' defines a local register used in the RHS of the assignment.
The bug is precisely that we were previously missing condition (1).
Fixes #26550
- - - - -
79dfcfe0 by sheaf at 2025-11-11T11:51:18-05:00
Update assigned register format when spilling
When we come to spilling a register to put new data into it, in
GHC.CmmToAsm.Reg.Linear.allocRegsAndSpill_spill, we need to:
1. Spill the data currently in the register. That is, do a spill
with a format that matches what's currently in the register.
2. Update the register assignment, allocating a virtual register to
this real register, but crucially **updating the format** of this
assignment.
Due to shadowing in the Haskell code for allocRegsAndSpill_spill, we
were mistakenly re-using the old format. This could lead to a situation
where:
a. We were using xmm6 to store a Double#.
b. We want to store a DoubleX2# into xmm6, so we spill the current
content of xmm6 to the stack using a scalar move (correct).
c. We update the register assignment, but we fail to update the format
of the assignment, so we continue to think that xmm6 stores a
Double# and not a DoubleX2#.
d. Later on, we need to spill xmm6 because it is getting clobbered by
another instruction. We then decide to only spill the lower 64 bits
of the register, because we still think that xmm6 only stores a
Double# and not a DoubleX2#.
Fixes #26542
- - - - -
aada5db9 by ARATA Mizuki at 2025-11-11T11:52:07-05:00
Fix the order of spill/reload instructions
The AArch64 NCG could emit multiple instructions for a single spill/reload,
but their order was not consistent between the definition and a use.
Fixes #26537
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
64ec82ff by Andreas Klebinger at 2025-11-11T11:52:48-05:00
Add hpc to release script
- - - - -
741da00c by Ben Gamari at 2025-11-12T03:38:20-05:00
template-haskell: Better describe getQ semantics
Clarify that the state is a type-indexed map, as suggested by #26484.
- - - - -
8b080e04 by ARATA Mizuki at 2025-11-12T03:39:11-05:00
Fix incorrect markups in the User's Guide
* Correct markup for C--: "C-\-" in reST
* Fix internal links
* Fix code highlighting
* Fix inline code: Use ``code`` rather than `code`
* Remove extra backslashes
Fixes #16812
Co-authored-by: sheaf <sam.derbyshire(a)gmail.com>
- - - - -
a00840ea by Simon Peyton Jones at 2025-11-14T15:23:56+00:00
Make TYPE and CONSTRAINT apart again
This patch finally fixes #24279.
* The story started with #11715
* Then #21623 articulated a plan, which made Type and Constraint
not-apart; a horrible hack but it worked. The main patch was
commit 778c6adca2c995cd8a1b84394d4d5ca26b915dac
Author: Simon Peyton Jones <simonpj(a)microsoft.com>
Date: Wed Nov 9 10:33:22 2022 +0000
Type vs Constraint: finally nailed
* #24279 reported a bug in the above big commit; this small patch fixes it
commit af6932d6c068361c6ae300d52e72fbe13f8e1f18
Author: Simon Peyton Jones <simon.peytonjones(a)gmail.com>
Date: Mon Jan 8 10:49:49 2024 +0000
Make TYPE and CONSTRAINT not-apart
Issue #24279 showed up a bug in the logic in GHC.Core.Unify.unify_ty
which is supposed to make TYPE and CONSTRAINT be not-apart.
* Then !10479 implemented "unary classes".
* That change in turn allows us to make Type and Constraint apart again,
cleaning up the compiler and allowing a little bit more expressiveness.
It fixes the original hope in #24279, namely that `Type` and `Constraint`
should be distinct throughout.
- - - - -
c0a1e574 by Georgios Karachalias at 2025-11-15T05:14:31-05:00
Report all missing modules with -M
We now report all missing modules at once in GHC.Driver.Makefile.processDeps,
as opposed to only reporting a single missing module. Fixes #26551.
- - - - -
c9fa3449 by Sylvain Henry at 2025-11-15T05:15:26-05:00
JS: fix array index for registers
We used to store R32 in h$regs[-1]. While it's correct in JavaScript,
fix this to store R32 in h$regs[0] instead.
- - - - -
9e469909 by Sylvain Henry at 2025-11-15T05:15:26-05:00
JS: support more than 128 registers (#26558)
The JS backend only supported 128 registers (JS variables/array slots
used to pass function arguments). It failed in T26537 when 129
registers were required.
This commit adds support for more than 128 registers: it is now limited to
maxBound :: Int (compiler's Int). If we ever go above this threshold the
compiler now panics with a more descriptive message.
A few built-in JS functions were assuming 128 registers and have been
rewritten to use loops. Note that loops are only used for "high"
registers that are stored in an array: the 31 "low" registers are still
handled with JS global variables and with explicit switch-cases to
maintain good performance in the most common cases (i.e. few registers
used). Adjusting the number of low registers is now easy: just one
constant to adjust (GHC.StgToJS.Regs.lowRegsCount).
No new test added: T26537 is used as a regression test instead.
- - - - -
0a64a78b by Sven Tennie at 2025-11-15T20:31:10-05:00
AArch64: Simplify CmmAssign and CmmStore
The special handling for floats was fake: The general case is always
used. So, the additional code path isn't needed (and only adds
complexity for the reader.)
- - - - -
15b311be by sheaf at 2025-11-15T20:32:02-05:00
SimpleOpt: refactor & push coercions into lambdas
This commit improves the simple optimiser (in GHC.Core.SimpleOpt)
in a couple of ways:
- The logic to push coercion lambdas is shored up.
The function 'pushCoercionIntoLambda' used to be called in 'finish_app',
but this meant we could not continue to optimise the program after
performing this transformation.
Now, we call 'pushCoercionIntoLambda' as part of 'simple_app'.
Doing so can be important when dealing with unlifted newtypes,
as explained in Note [Desugaring unlifted newtypes].
- The code is re-structured to avoid duplication and out-of-sync
code paths.
Now, 'simple_opt_expr' defers to 'simple_app' for the 'App', 'Var',
'Cast' and 'Lam' cases. This means all the logic for those is
centralised in a single place (e.g. the 'go_lam' helper function).
To do this, the general structure is brought a bit closer to the
full-blown simplifier, with a notion of 'continuation'
(see 'SimpleContItem').
This commit also modifies GHC.Core.Opt.Arity.pushCoercionIntoLambda to
apply a substitution (a slight generalisation of its existing implementation).
- - - - -
b33284c7 by sheaf at 2025-11-15T20:32:02-05:00
Improve typechecking of data constructors
This commit changes the way in which we perform typecheck data
constructors, in particular how we make multiplicities line up.
Now, impedance matching occurs as part of the existing subsumption
machinery. See the revamped Note [Typechecking data constructors] in
GHC.Tc.Gen.App, as well as Note [Polymorphisation of linear fields]
in GHC.Core.Multiplicity.
This allows us to get rid of a fair amount of hacky code that was
added with the introduction of LinearTypes; in particular the logic of
GHC.Tc.Gen.Head.tcInferDataCon.
-------------------------
Metric Decrease:
T10421
T14766
T15164
T15703
T19695
T5642
T9630
WWRec
-------------------------
- - - - -
b6faf5d0 by sheaf at 2025-11-15T20:32:02-05:00
Handle unsaturated rep-poly newtypes
This commit allows GHC to handle unsaturated occurrences of unlifted
newtype constructors. The plan is detailed in
Note [Eta-expanding rep-poly unlifted newtypes]
in GHC.Tc.Utils.Concrete: for unsaturated unlifted newtypes, we perform
the appropriate representation-polymorphism check in tcInstFun.
- - - - -
682bf979 by Mike Pilgrem at 2025-11-16T16:44:14+00:00
Fix #26293 Valid stack.yaml for hadrian
- - - - -
acc70c3a by Simon Peyton Jones at 2025-11-18T16:21:20-05:00
Fix a bug in defaulting
Addresses #26582
Defaulting was doing some unification but then failing to
iterate. Silly.
I discovered that the main solver was unnecessarily iterating even
if there was a unification for an /outer/ unification variable, so
I fixed that too.
- - - - -
c12fa73e by Simon Peyton Jones at 2025-11-19T02:55:01-05:00
Make PmLit be in Ord, and use it in Map
This MR addresses #26514, by changing from
data PmAltConSet = PACS !(UniqDSet ConLike) ![PmLit]
to
data PmAltConSet = PACS !(UniqDSet ConLike) !(Map PmLit PmLit)
This matters when doing pattern-match overlap checking, when there
is a very large set of patterns. For most programs it makes
no difference at all.
For the N=5000 case of the repro case in #26514, compiler
mutator time (with `-fno-code`) goes from 1.9s to 0.43s.
All for the price for an Ord instance for PmLit
- - - - -
41b84f40 by sheaf at 2025-11-19T02:55:52-05:00
Add passing tests for #26311 and #26072
This commit adds two tests cases that now pass since landing the changes
to typechecking of data constructors in b33284c7.
Fixes #26072 #26311
- - - - -
1faa758a by sheaf at 2025-11-19T02:55:52-05:00
mkCast: weaken bad cast warning for multiplicity
This commit weakens the warning message emitted when constructing a bad
cast in mkCast to ignore multiplicity.
Justification: since b33284c7, GHC uses sub-multiplicity coercions to
typecheck data constructors. The coercion optimiser is free to discard
these coercions, both for performance reasons, and because GHC's Core
simplifier does not (yet) preserve linearity.
We thus weaken 'mkCast' to use 'eqTypeIgnoringMultiplicity' instead of
'eqType', to avoid getting many spurious warnings about mismatched
multiplicities.
- - - - -
1c40c191 by Adam Gundry at 2025-11-20T21:05:46+00:00
WIP: introduce cast zapping as an alternative to coercion zapping
- - - - -
95077b55 by Adam Gundry at 2025-11-20T21:05:46+00:00
Attempt to improve T5030 by zapping in ds_hs_wrapper
- - - - -
8e288fa9 by Adam Gundry at 2025-11-20T21:05:46+00:00
Try heuristic in ds_hs_wrapper
Regresses T15703 considerably
- - - - -
1991 changed files:
- .gitlab-ci.yml
- .gitlab/ci.sh
- .gitlab/common.sh
- .gitlab/darwin/toolchain.nix
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- .gitlab/rel_eng/fetch-gitlab-artifacts/fetch_gitlab.py
- .gitlab/rel_eng/mk-ghcup-metadata/mk_ghcup_metadata.py
- .gitlab/rel_eng/upload_ghc_libs.py
- .gitmodules
- .mailmap
- CODEOWNERS
- README.md
- cabal.project-reinstall
- compiler/GHC.hs
- compiler/GHC/Builtin/Names.hs
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Builtin/PrimOps.hs
- compiler/GHC/Builtin/PrimOps/Ids.hs
- compiler/GHC/Builtin/Types.hs
- compiler/GHC/Builtin/Types/Literals.hs
- compiler/GHC/Builtin/Types/Prim.hs
- compiler/GHC/Builtin/Uniques.hs
- compiler/GHC/Builtin/primops.txt.pp
- compiler/GHC/ByteCode/Asm.hs
- + compiler/GHC/ByteCode/Breakpoints.hs
- compiler/GHC/ByteCode/InfoTable.hs
- compiler/GHC/ByteCode/Instr.hs
- compiler/GHC/ByteCode/Linker.hs
- + compiler/GHC/ByteCode/Serialize.hs
- compiler/GHC/ByteCode/Types.hs
- compiler/GHC/Cmm.hs
- compiler/GHC/Cmm/CLabel.hs
- compiler/GHC/Cmm/CommonBlockElim.hs
- compiler/GHC/Cmm/Dataflow/Label.hs
- compiler/GHC/Cmm/Info.hs
- compiler/GHC/Cmm/Info/Build.hs
- compiler/GHC/Cmm/MachOp.hs
- compiler/GHC/Cmm/Parser.y
- compiler/GHC/Cmm/Pipeline.hs
- compiler/GHC/Cmm/Sink.hs
- compiler/GHC/Cmm/UniqueRenamer.hs
- compiler/GHC/Cmm/Utils.hs
- compiler/GHC/CmmToAsm/AArch64/CodeGen.hs
- compiler/GHC/CmmToAsm/CFG.hs
- compiler/GHC/CmmToAsm/Config.hs
- compiler/GHC/CmmToAsm/LA64.hs
- compiler/GHC/CmmToAsm/LA64/CodeGen.hs
- compiler/GHC/CmmToAsm/LA64/Instr.hs
- compiler/GHC/CmmToAsm/LA64/Ppr.hs
- compiler/GHC/CmmToAsm/PPC/Ppr.hs
- compiler/GHC/CmmToAsm/Ppr.hs
- compiler/GHC/CmmToAsm/RV64/CodeGen.hs
- compiler/GHC/CmmToAsm/Reg/Linear.hs
- compiler/GHC/CmmToAsm/Reg/Liveness.hs
- compiler/GHC/CmmToAsm/Wasm/FromCmm.hs
- compiler/GHC/CmmToAsm/X86/CodeGen.hs
- compiler/GHC/CmmToAsm/X86/Instr.hs
- compiler/GHC/CmmToAsm/X86/Ppr.hs
- compiler/GHC/CmmToC.hs
- compiler/GHC/CmmToLlvm/Base.hs
- compiler/GHC/CmmToLlvm/CodeGen.hs
- compiler/GHC/CmmToLlvm/Data.hs
- compiler/GHC/Core.hs
- compiler/GHC/Core/Class.hs
- compiler/GHC/Core/Coercion.hs
- compiler/GHC/Core/Coercion.hs-boot
- compiler/GHC/Core/Coercion/Opt.hs
- compiler/GHC/Core/ConLike.hs
- compiler/GHC/Core/DataCon.hs
- compiler/GHC/Core/DataCon.hs-boot
- compiler/GHC/Core/FVs.hs
- compiler/GHC/Core/FamInstEnv.hs
- compiler/GHC/Core/LateCC/OverloadedCalls.hs
- compiler/GHC/Core/Lint.hs
- compiler/GHC/Core/Make.hs
- compiler/GHC/Core/Map/Expr.hs
- compiler/GHC/Core/Map/Type.hs
- compiler/GHC/Core/Multiplicity.hs
- compiler/GHC/Core/Opt/Arity.hs
- compiler/GHC/Core/Opt/CSE.hs
- compiler/GHC/Core/Opt/CallArity.hs
- compiler/GHC/Core/Opt/ConstantFold.hs
- compiler/GHC/Core/Opt/CprAnal.hs
- compiler/GHC/Core/Opt/DmdAnal.hs
- compiler/GHC/Core/Opt/Monad.hs
- compiler/GHC/Core/Opt/OccurAnal.hs
- compiler/GHC/Core/Opt/Pipeline.hs
- compiler/GHC/Core/Opt/Pipeline/Types.hs
- compiler/GHC/Core/Opt/SetLevels.hs
- compiler/GHC/Core/Opt/Simplify.hs
- compiler/GHC/Core/Opt/Simplify/Env.hs
- compiler/GHC/Core/Opt/Simplify/Inline.hs
- compiler/GHC/Core/Opt/Simplify/Iteration.hs
- compiler/GHC/Core/Opt/Simplify/Monad.hs
- compiler/GHC/Core/Opt/Simplify/Utils.hs
- compiler/GHC/Core/Opt/SpecConstr.hs
- compiler/GHC/Core/Opt/Specialise.hs
- compiler/GHC/Core/Opt/WorkWrap.hs
- compiler/GHC/Core/Opt/WorkWrap/Utils.hs
- compiler/GHC/Core/PatSyn.hs
- compiler/GHC/Core/Ppr.hs
- compiler/GHC/Core/Predicate.hs
- compiler/GHC/Core/Reduction.hs
- compiler/GHC/Core/RoughMap.hs
- compiler/GHC/Core/Rules.hs
- compiler/GHC/Core/Rules/Config.hs
- compiler/GHC/Core/Seq.hs
- compiler/GHC/Core/SimpleOpt.hs
- compiler/GHC/Core/Stats.hs
- compiler/GHC/Core/Subst.hs
- compiler/GHC/Core/Tidy.hs
- compiler/GHC/Core/TyCo/Compare.hs
- compiler/GHC/Core/TyCo/FVs.hs
- compiler/GHC/Core/TyCo/Ppr.hs
- compiler/GHC/Core/TyCo/Ppr.hs-boot
- compiler/GHC/Core/TyCo/Rep.hs
- compiler/GHC/Core/TyCo/Rep.hs-boot
- compiler/GHC/Core/TyCo/Subst.hs
- compiler/GHC/Core/TyCo/Tidy.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Core/Type.hs
- compiler/GHC/Core/Unfold.hs
- compiler/GHC/Core/Unfold/Make.hs
- compiler/GHC/Core/Unify.hs
- compiler/GHC/Core/Utils.hs
- compiler/GHC/CoreToIface.hs
- compiler/GHC/CoreToStg.hs
- + compiler/GHC/CoreToStg/AddImplicitBinds.hs
- compiler/GHC/CoreToStg/Prep.hs
- compiler/GHC/Data/FlatBag.hs
- compiler/GHC/Data/IOEnv.hs
- compiler/GHC/Data/SmallArray.hs
- compiler/GHC/Data/Word64Map/Internal.hs
- compiler/GHC/Data/Word64Map/Lazy.hs
- compiler/GHC/Driver/Backend.hs
- compiler/GHC/Driver/Backend/Internal.hs
- compiler/GHC/Driver/Backpack.hs
- + compiler/GHC/Driver/ByteCode.hs
- compiler/GHC/Driver/CmdLine.hs
- compiler/GHC/Driver/CodeOutput.hs
- compiler/GHC/Driver/Config.hs
- compiler/GHC/Driver/Config/CmmToAsm.hs
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/Config/Core/Opt/Simplify.hs
- compiler/GHC/Driver/Config/Core/Rules.hs
- compiler/GHC/Driver/Config/Finder.hs
- compiler/GHC/Driver/Config/Stg/Debug.hs
- compiler/GHC/Driver/Downsweep.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Env.hs
- compiler/GHC/Driver/Env/Types.hs
- compiler/GHC/Driver/Errors.hs
- compiler/GHC/Driver/Errors/Ppr.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Main.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/MakeFile.hs
- compiler/GHC/Driver/Messager.hs
- compiler/GHC/Driver/Monad.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Driver/Plugins.hs
- compiler/GHC/Driver/Session.hs
- + compiler/GHC/Driver/Session/Inspect.hs
- compiler/GHC/Hs.hs
- compiler/GHC/Hs/Binds.hs
- compiler/GHC/Hs/Decls.hs
- compiler/GHC/Hs/Expr.hs
- compiler/GHC/Hs/Expr.hs-boot
- compiler/GHC/Hs/ImpExp.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Pat.hs
- compiler/GHC/Hs/Syn/Type.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/Hs/Utils.hs
- compiler/GHC/HsToCore.hs
- compiler/GHC/HsToCore/Binds.hs
- compiler/GHC/HsToCore/Breakpoints.hs
- compiler/GHC/HsToCore/Docs.hs
- compiler/GHC/HsToCore/Errors/Ppr.hs
- compiler/GHC/HsToCore/Errors/Types.hs
- compiler/GHC/HsToCore/Expr.hs
- compiler/GHC/HsToCore/Foreign/C.hs
- compiler/GHC/HsToCore/Foreign/Call.hs
- compiler/GHC/HsToCore/Foreign/JavaScript.hs
- compiler/GHC/HsToCore/Foreign/Prim.hs
- compiler/GHC/HsToCore/Foreign/Wasm.hs
- compiler/GHC/HsToCore/Match.hs
- compiler/GHC/HsToCore/Monad.hs
- compiler/GHC/HsToCore/Pmc/Ppr.hs
- compiler/GHC/HsToCore/Pmc/Solver.hs
- compiler/GHC/HsToCore/Pmc/Solver/Types.hs
- compiler/GHC/HsToCore/Pmc/Types.hs
- compiler/GHC/HsToCore/Pmc/Utils.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/HsToCore/Ticks.hs
- compiler/GHC/HsToCore/Usage.hs
- compiler/GHC/HsToCore/Utils.hs
- compiler/GHC/Iface/Binary.hs
- compiler/GHC/Iface/Decl.hs
- compiler/GHC/Iface/Errors/Ppr.hs
- compiler/GHC/Iface/Ext/Ast.hs
- compiler/GHC/Iface/Ext/Binary.hs
- compiler/GHC/Iface/Ext/Types.hs
- compiler/GHC/Iface/Flags.hs
- compiler/GHC/Iface/Load.hs
- compiler/GHC/Iface/Make.hs
- compiler/GHC/Iface/Recomp.hs
- compiler/GHC/Iface/Recomp/Flags.hs
- compiler/GHC/Iface/Recomp/Types.hs
- compiler/GHC/Iface/Rename.hs
- compiler/GHC/Iface/Syntax.hs
- compiler/GHC/Iface/Tidy.hs
- compiler/GHC/Iface/Tidy/StaticPtrTable.hs
- compiler/GHC/Iface/Type.hs
- compiler/GHC/IfaceToCore.hs
- compiler/GHC/JS/JStg/Monad.hs
- compiler/GHC/Linker/Deps.hs
- compiler/GHC/Linker/Dynamic.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/MacOS.hs
- compiler/GHC/Linker/Static.hs
- compiler/GHC/Linker/Types.hs
- compiler/GHC/Llvm/Ppr.hs
- compiler/GHC/Llvm/Types.hs
- compiler/GHC/Parser.y
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/Header.hs
- compiler/GHC/Parser/Lexer.x
- compiler/GHC/Parser/Lexer/String.x
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Parser/PostProcess/Haddock.hs
- compiler/GHC/Parser/Types.hs
- compiler/GHC/Platform.hs
- compiler/GHC/Platform/Reg.hs
- compiler/GHC/Plugins.hs
- compiler/GHC/Rename/Bind.hs
- compiler/GHC/Rename/Env.hs
- compiler/GHC/Rename/Expr.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Rename/Names.hs
- compiler/GHC/Rename/Pat.hs
- compiler/GHC/Rename/Splice.hs
- compiler/GHC/Rename/Unbound.hs
- compiler/GHC/Rename/Utils.hs
- compiler/GHC/Runtime/Context.hs
- compiler/GHC/Runtime/Debugger/Breakpoints.hs
- compiler/GHC/Runtime/Eval.hs
- compiler/GHC/Runtime/Eval/Types.hs
- compiler/GHC/Runtime/Heap/Inspect.hs
- compiler/GHC/Runtime/Interpreter.hs
- compiler/GHC/Runtime/Interpreter/Types.hs
- compiler/GHC/Runtime/Loader.hs
- compiler/GHC/Settings.hs
- compiler/GHC/Settings/IO.hs
- compiler/GHC/Stg/BcPrep.hs
- compiler/GHC/Stg/Debug.hs
- + compiler/GHC/Stg/Debug/Types.hs
- compiler/GHC/Stg/EnforceEpt.hs
- compiler/GHC/Stg/EnforceEpt/Types.hs
- compiler/GHC/Stg/FVs.hs
- compiler/GHC/Stg/Lint.hs
- compiler/GHC/Stg/Pipeline.hs
- compiler/GHC/Stg/Unarise.hs
- compiler/GHC/StgToByteCode.hs
- compiler/GHC/StgToCmm.hs
- compiler/GHC/StgToCmm/DataCon.hs
- compiler/GHC/StgToCmm/ExtCode.hs
- compiler/GHC/StgToCmm/InfoTableProv.hs
- compiler/GHC/StgToCmm/Layout.hs
- compiler/GHC/StgToCmm/Monad.hs
- compiler/GHC/StgToCmm/Prim.hs
- compiler/GHC/StgToJS/Apply.hs
- compiler/GHC/StgToJS/CodeGen.hs
- compiler/GHC/StgToJS/Expr.hs
- compiler/GHC/StgToJS/Ids.hs
- compiler/GHC/StgToJS/Linker/Linker.hs
- compiler/GHC/StgToJS/Prim.hs
- compiler/GHC/StgToJS/Regs.hs
- compiler/GHC/StgToJS/Rts/Rts.hs
- compiler/GHC/StgToJS/Rts/Types.hs
- compiler/GHC/StgToJS/StaticPtr.hs
- compiler/GHC/SysTools/Ar.hs
- compiler/GHC/SysTools/BaseDir.hs
- compiler/GHC/SysTools/Process.hs
- compiler/GHC/SysTools/Tasks.hs
- compiler/GHC/Tc/Deriv.hs
- compiler/GHC/Tc/Deriv/Generate.hs
- compiler/GHC/Tc/Deriv/Generics.hs
- compiler/GHC/Tc/Deriv/Infer.hs
- compiler/GHC/Tc/Deriv/Utils.hs
- compiler/GHC/Tc/Errors.hs
- compiler/GHC/Tc/Errors/Hole.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/App.hs
- compiler/GHC/Tc/Gen/Bind.hs
- compiler/GHC/Tc/Gen/Export.hs
- compiler/GHC/Tc/Gen/Expr.hs
- compiler/GHC/Tc/Gen/Expr.hs-boot
- compiler/GHC/Tc/Gen/Head.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Match.hs
- compiler/GHC/Tc/Gen/Pat.hs
- compiler/GHC/Tc/Gen/Sig.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/Gen/Splice.hs-boot
- compiler/GHC/Tc/Instance/Class.hs
- compiler/GHC/Tc/Instance/Family.hs
- compiler/GHC/Tc/Instance/FunDeps.hs
- compiler/GHC/Tc/Module.hs
- compiler/GHC/Tc/Solver.hs
- compiler/GHC/Tc/Solver/Default.hs
- compiler/GHC/Tc/Solver/Dict.hs
- compiler/GHC/Tc/Solver/Equality.hs
- + compiler/GHC/Tc/Solver/FunDeps.hs
- compiler/GHC/Tc/Solver/InertSet.hs
- compiler/GHC/Tc/Solver/Irred.hs
- compiler/GHC/Tc/Solver/Monad.hs
- compiler/GHC/Tc/Solver/Rewrite.hs
- compiler/GHC/Tc/Solver/Solve.hs
- + compiler/GHC/Tc/Solver/Solve.hs-boot
- compiler/GHC/Tc/Solver/Types.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/TyCl/Build.hs
- compiler/GHC/Tc/TyCl/Instance.hs
- compiler/GHC/Tc/TyCl/PatSyn.hs
- compiler/GHC/Tc/TyCl/Utils.hs
- compiler/GHC/Tc/Types.hs
- compiler/GHC/Tc/Types/Constraint.hs
- compiler/GHC/Tc/Types/CtLoc.hs
- compiler/GHC/Tc/Types/ErrCtxt.hs
- compiler/GHC/Tc/Types/EvTerm.hs
- compiler/GHC/Tc/Types/Evidence.hs
- compiler/GHC/Tc/Types/Origin.hs
- compiler/GHC/Tc/Types/TH.hs
- compiler/GHC/Tc/Utils/Concrete.hs
- compiler/GHC/Tc/Utils/Instantiate.hs
- compiler/GHC/Tc/Utils/Monad.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/Tc/Utils/TcType.hs
- compiler/GHC/Tc/Utils/Unify.hs
- compiler/GHC/Tc/Utils/Unify.hs-boot
- compiler/GHC/Tc/Validity.hs
- compiler/GHC/Tc/Zonk/TcType.hs
- compiler/GHC/Tc/Zonk/Type.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Basic.hs
- − compiler/GHC/Types/Breakpoint.hs
- compiler/GHC/Types/Demand.hs
- compiler/GHC/Types/Error.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/GHC/Types/Hint.hs
- compiler/GHC/Types/Hint/Ppr.hs
- compiler/GHC/Types/Id.hs
- compiler/GHC/Types/Id/Make.hs
- compiler/GHC/Types/Name/Cache.hs
- compiler/GHC/Types/Name/Ppr.hs
- compiler/GHC/Types/Name/Reader.hs
- compiler/GHC/Types/RepType.hs
- compiler/GHC/Types/SourceError.hs
- compiler/GHC/Types/SourceText.hs
- compiler/GHC/Types/SptEntry.hs
- compiler/GHC/Types/ThLevelIndex.hs
- compiler/GHC/Types/Tickish.hs
- compiler/GHC/Types/TyThing.hs
- compiler/GHC/Types/TyThing/Ppr.hs
- compiler/GHC/Types/Unique.hs
- compiler/GHC/Types/Unique/DFM.hs
- compiler/GHC/Types/Unique/DSM.hs
- compiler/GHC/Types/Unique/FM.hs
- compiler/GHC/Types/Unique/Supply.hs
- compiler/GHC/Types/Var.hs
- compiler/GHC/Types/Var.hs-boot
- compiler/GHC/Types/Var/Env.hs
- compiler/GHC/Unit/Env.hs
- compiler/GHC/Unit/Finder.hs
- compiler/GHC/Unit/Finder/Types.hs
- compiler/GHC/Unit/Home/Graph.hs
- compiler/GHC/Unit/Home/ModInfo.hs
- compiler/GHC/Unit/Module/Deps.hs
- compiler/GHC/Unit/Module/Graph.hs
- compiler/GHC/Unit/Module/Location.hs
- compiler/GHC/Unit/Module/ModGuts.hs
- compiler/GHC/Unit/Module/ModSummary.hs
- compiler/GHC/Unit/Module/Status.hs
- compiler/GHC/Unit/Module/WholeCoreBindings.hs
- compiler/GHC/Unit/State.hs
- compiler/GHC/Unit/Types.hs
- compiler/GHC/Utils/Binary.hs
- + compiler/GHC/Utils/EndoOS.hs
- compiler/GHC/Utils/Error.hs
- compiler/GHC/Utils/Logger.hs
- compiler/GHC/Utils/Outputable.hs
- compiler/GHC/Utils/Panic.hs
- compiler/GHC/Utils/Ppr.hs
- compiler/Language/Haskell/Syntax/Binds.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/Language/Haskell/Syntax/Expr.hs
- compiler/Language/Haskell/Syntax/Extension.hs
- compiler/Language/Haskell/Syntax/Pat.hs
- compiler/Setup.hs
- compiler/cbits/keepCAFsForGHCi.c
- compiler/ghc.cabal.in
- configure.ac
- distrib/configure.ac.in
- docs/core-spec/CoreLint.ott
- docs/core-spec/CoreSyn.ott
- docs/users_guide/9.14.1-notes.rst → docs/users_guide/9.16.1-notes.rst
- docs/users_guide/bugs.rst
- docs/users_guide/compare-flags.py
- docs/users_guide/conf.py
- docs/users_guide/debug-info.rst
- docs/users_guide/debugging.rst
- + docs/users_guide/diagnostics-as-json-schema-1_2.json
- docs/users_guide/eventlog-formats.rst
- docs/users_guide/expected-undocumented-flags.txt
- docs/users_guide/extending_ghc.rst
- docs/users_guide/exts/arrows.rst
- docs/users_guide/exts/data_kinds.rst
- docs/users_guide/exts/derive_any_class.rst
- docs/users_guide/exts/deriving_extra.rst
- docs/users_guide/exts/deriving_inferred.rst
- docs/users_guide/exts/deriving_strategies.rst
- docs/users_guide/exts/doandifthenelse.rst
- docs/users_guide/exts/ffi.rst
- docs/users_guide/exts/gadt.rst
- docs/users_guide/exts/gadt_syntax.rst
- docs/users_guide/exts/generics.rst
- docs/users_guide/exts/linear_types.rst
- docs/users_guide/exts/overloaded_labels.rst
- docs/users_guide/exts/overloaded_strings.rst
- docs/users_guide/exts/pattern_synonyms.rst
- docs/users_guide/exts/poly_kinds.rst
- docs/users_guide/exts/pragmas.rst
- docs/users_guide/exts/primitives.rst
- docs/users_guide/exts/rank_polymorphism.rst
- docs/users_guide/exts/rebindable_syntax.rst
- + docs/users_guide/exts/relaxed_poly_rec.rst
- docs/users_guide/exts/required_type_arguments.rst
- docs/users_guide/exts/scoped_type_variables.rst
- docs/users_guide/exts/standalone_deriving.rst
- docs/users_guide/exts/strict.rst
- docs/users_guide/exts/template_haskell.rst
- docs/users_guide/exts/tuple_sections.rst
- docs/users_guide/exts/type_data.rst
- docs/users_guide/exts/type_defaulting.rst
- docs/users_guide/exts/types.rst
- docs/users_guide/flags.py
- docs/users_guide/ghci.rst
- docs/users_guide/gone_wrong.rst
- docs/users_guide/hints.rst
- docs/users_guide/javascript.rst
- docs/users_guide/phases.rst
- docs/users_guide/profiling.rst
- docs/users_guide/release-notes.rst
- docs/users_guide/runtime_control.rst
- docs/users_guide/separate_compilation.rst
- docs/users_guide/using-optimisation.rst
- docs/users_guide/using-warnings.rst
- docs/users_guide/using.rst
- docs/users_guide/wasm.rst
- docs/users_guide/win32-dlls.rst
- ghc/GHCi/UI.hs
- ghc/GHCi/UI/Exception.hs
- ghc/GHCi/UI/Info.hs
- ghc/GHCi/UI/Monad.hs
- ghc/GHCi/UI/Print.hs
- ghc/Main.hs
- ghc/ghc-bin.cabal.in
- hadrian/bindist/Makefile
- hadrian/bindist/config.mk.in
- hadrian/bootstrap/generate_bootstrap_plans
- hadrian/bootstrap/hadrian-bootstrap-gen.cabal
- hadrian/bootstrap/plan-9_10_1.json
- hadrian/bootstrap/plan-9_6_5.json → hadrian/bootstrap/plan-9_10_2.json
- hadrian/bootstrap/plan-9_6_6.json → hadrian/bootstrap/plan-9_12_1.json
- hadrian/bootstrap/plan-9_6_4.json → hadrian/bootstrap/plan-9_12_2.json
- − hadrian/bootstrap/plan-9_6_1.json
- − hadrian/bootstrap/plan-9_6_2.json
- − hadrian/bootstrap/plan-9_6_3.json
- − hadrian/bootstrap/plan-9_8_1.json
- − hadrian/bootstrap/plan-9_8_2.json
- hadrian/bootstrap/plan-bootstrap-9_10_1.json
- hadrian/bootstrap/plan-bootstrap-9_6_5.json → hadrian/bootstrap/plan-bootstrap-9_10_2.json
- hadrian/bootstrap/plan-bootstrap-9_6_6.json → hadrian/bootstrap/plan-bootstrap-9_12_1.json
- hadrian/bootstrap/plan-bootstrap-9_8_1.json → hadrian/bootstrap/plan-bootstrap-9_12_2.json
- − hadrian/bootstrap/plan-bootstrap-9_6_1.json
- − hadrian/bootstrap/plan-bootstrap-9_6_2.json
- − hadrian/bootstrap/plan-bootstrap-9_6_3.json
- − hadrian/bootstrap/plan-bootstrap-9_6_4.json
- − hadrian/bootstrap/plan-bootstrap-9_8_2.json
- hadrian/bootstrap/src/Main.hs
- hadrian/cfg/default.host.target.in
- hadrian/cfg/default.target.in
- hadrian/cfg/system.config.in
- hadrian/doc/flavours.md
- hadrian/doc/user-settings.md
- hadrian/hadrian.cabal
- hadrian/src/Base.hs
- hadrian/src/Builder.hs
- hadrian/src/Context.hs
- hadrian/src/Context/Path.hs
- hadrian/src/Flavour.hs
- hadrian/src/Flavour/Type.hs
- hadrian/src/Oracles/Flag.hs
- hadrian/src/Oracles/Setting.hs
- hadrian/src/Oracles/TestSettings.hs
- hadrian/src/Packages.hs
- hadrian/src/Rules/Generate.hs
- hadrian/src/Rules/Gmp.hs
- hadrian/src/Rules/Libffi.hs
- hadrian/src/Rules/ToolArgs.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Builders/Common.hs
- hadrian/src/Settings/Builders/DeriveConstants.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Builders/Hsc2Hs.hs
- hadrian/src/Settings/Builders/RunTest.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Flavours/Release.hs
- hadrian/src/Settings/Packages.hs
- hadrian/src/Settings/Program.hs
- hadrian/src/Settings/Warnings.hs
- hadrian/stack.yaml
- hadrian/stack.yaml.lock
- libffi-tarballs
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- libraries/Win32
- libraries/array
- libraries/base/base.cabal.in
- libraries/base/changelog.md
- libraries/base/src/Control/Applicative.hs
- libraries/base/src/Control/Exception.hs
- libraries/base/src/Control/Exception/Backtrace.hs
- libraries/base/src/Control/Monad.hs
- libraries/base/src/Data/Array/Byte.hs
- libraries/base/src/Data/Bifunctor.hs
- libraries/base/src/Data/Fixed.hs
- libraries/base/src/Data/List/NonEmpty.hs
- libraries/base/src/GHC/Base.hs
- libraries/base/src/GHC/Exts.hs
- libraries/base/src/GHC/Generics.hs
- − libraries/base/src/GHC/IOPort.hs
- libraries/base/src/GHC/RTS/Flags.hs
- libraries/base/src/GHC/Stack/CloneStack.hs
- libraries/base/src/GHC/Weak/Finalize.hs
- libraries/base/src/System/Console/GetOpt.hs
- libraries/base/tests/IO/withBinaryFile002.stderr
- libraries/base/tests/IO/withFile002.stderr
- libraries/base/tests/IO/withFileBlocking002.stderr
- libraries/base/tests/all.T
- libraries/base/tests/unicode002.stdout
- libraries/base/tests/unicode003.stdout
- libraries/binary
- libraries/containers
- libraries/deepseq
- libraries/directory
- libraries/exceptions
- libraries/filepath
- libraries/ghc-bignum/changelog.md
- + libraries/ghc-boot-th/GHC/Boot/TH/Monad.hs
- libraries/ghc-boot-th/GHC/Boot/TH/Ppr.hs
- libraries/ghc-boot-th/ghc-boot-th.cabal.in
- libraries/ghc-boot/GHC/Settings/Utils.hs
- libraries/ghc-boot/Setup.hs
- libraries/ghc-boot/ghc-boot.cabal.in
- libraries/ghc-compact/GHC/Compact.hs
- libraries/ghc-compact/GHC/Compact/Serialized.hs
- libraries/ghc-compact/ghc-compact.cabal
- libraries/ghc-experimental/CHANGELOG.md
- libraries/ghc-experimental/ghc-experimental.cabal.in
- + libraries/ghc-experimental/src/GHC/Exception/Backtrace/Experimental.hs
- + libraries/ghc-experimental/src/GHC/Stack/Annotation/Experimental.hs
- + libraries/ghc-experimental/src/System/Mem/Experimental.hs
- libraries/ghc-heap/GHC/Exts/Heap.hs
- libraries/ghc-heap/GHC/Exts/Heap/ClosureTypes.hs
- libraries/ghc-heap/GHC/Exts/Heap/Closures.hs
- + libraries/ghc-heap/GHC/Exts/Heap/Constants.hs
- libraries/ghc-heap/GHC/Exts/Heap/FFIClosures_ProfilingDisabled.hsc
- libraries/ghc-heap/GHC/Exts/Heap/FFIClosures_ProfilingEnabled.hsc
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hs
- + libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hs
- libraries/ghc-heap/GHC/Exts/Heap/ProfInfo/Types.hs
- libraries/ghc-heap/GHC/Exts/Heap/Utils.hsc
- libraries/ghc-heap/GHC/Exts/Stack.hs
- + libraries/ghc-heap/GHC/Exts/Stack/Constants.hs
- libraries/ghc-heap/GHC/Exts/Stack/Decode.hs
- libraries/ghc-heap/ghc-heap.cabal.in
- libraries/ghc-heap/tests/parse_tso_flags.hs
- libraries/ghc-heap/cbits/HeapPrim.cmm → libraries/ghc-internal/cbits/HeapPrim.cmm
- + libraries/ghc-internal/cbits/RtsIface.c
- libraries/ghc-heap/cbits/Stack.cmm → libraries/ghc-internal/cbits/Stack.cmm
- libraries/ghc-internal/cbits/StackCloningDecoding.cmm
- libraries/ghc-heap/cbits/Stack_c.c → libraries/ghc-internal/cbits/Stack_c.c
- libraries/ghc-internal/codepages/MakeTable.hs
- libraries/ghc-internal/codepages/Makefile
- libraries/ghc-internal/ghc-internal.cabal.in
- + libraries/ghc-internal/include/RtsIfaceSymbols.h
- libraries/ghc-internal/jsbits/base.js
- + libraries/ghc-internal/src/GHC/Internal/AllocationLimitHandler.hs
- libraries/ghc-internal/src/GHC/Internal/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Bignum/Natural.hs
- libraries/ghc-internal/src/GHC/Internal/ClosureTypes.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Monad/Fail.hs
- libraries/ghc-internal/src/GHC/Internal/Data/Data.hs
- libraries/ghc-internal/src/GHC/Internal/Data/OldList.hs
- libraries/ghc-internal/src/GHC/Internal/Event/Windows.hsc
- libraries/ghc-internal/src/GHC/Internal/Event/Windows/Thread.hs
- libraries/ghc-internal/src/GHC/Internal/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Backtrace.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs-boot
- libraries/ghc-internal/src/GHC/Internal/Exts.hs
- libraries/ghc-internal/src/GHC/Internal/Float.hs
- + libraries/ghc-internal/src/GHC/Internal/Heap/Closures.hs
- libraries/ghc-heap/GHC/Exts/Heap/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/Constants.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTable/Types.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTable/Types.hsc
- libraries/ghc-heap/GHC/Exts/Heap/InfoTableProf.hsc → libraries/ghc-internal/src/GHC/Internal/Heap/InfoTableProf.hsc
- + libraries/ghc-internal/src/GHC/Internal/Heap/ProfInfo/Types.hs
- libraries/ghc-internal/src/GHC/Internal/IO.hs-boot
- libraries/ghc-internal/src/GHC/Internal/IO/Buffer.hs
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- − libraries/ghc-internal/src/GHC/Internal/IOPort.hs
- libraries/ghc-internal/src/GHC/Internal/List.hs
- libraries/ghc-internal/src/GHC/Internal/Prim/PtrEq.hs
- libraries/ghc-internal/src/GHC/Internal/RTS/Flags.hsc
- libraries/ghc-internal/src/GHC/Internal/Real.hs
- libraries/ghc-internal/src/GHC/Internal/ResponseFile.hs
- + libraries/ghc-internal/src/GHC/Internal/Stack/Annotation.hs
- libraries/ghc-internal/src/GHC/Internal/Stack/CloneStack.hs
- libraries/ghc-heap/GHC/Exts/Stack/Constants.hsc → libraries/ghc-internal/src/GHC/Internal/Stack/Constants.hsc
- + libraries/ghc-internal/src/GHC/Internal/Stack/ConstantsProf.hsc
- + libraries/ghc-internal/src/GHC/Internal/Stack/Decode.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO.hs
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- libraries/ghc-internal/src/GHC/Internal/TH/Quote.hs
- libraries/ghc-internal/src/GHC/Internal/TH/Syntax.hs
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- libraries/ghc-internal/src/GHC/Internal/Unicode/Version.hs
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- + libraries/ghc-internal/tests/all.T
- + libraries/ghc-internal/tests/backtraces/Makefile
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- + libraries/ghc-internal/tests/backtraces/T14532a.stdout
- + libraries/ghc-internal/tests/backtraces/T14532b.hs
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- utils/check-exact/Preprocess.hs
- utils/deriveConstants/Main.hs
- utils/genprimopcode/Lexer.x
- utils/genprimopcode/Main.hs
- utils/genprimopcode/Parser.y
- utils/genprimopcode/ParserM.hs
- utils/genprimopcode/Syntax.hs
- utils/genprimopcode/genprimopcode.cabal
- utils/ghc-pkg/Main.hs
- utils/ghc-pkg/ghc-pkg.cabal.in
- utils/ghc-toolchain/exe/Main.hs
- utils/ghc-toolchain/ghc-toolchain.cabal
- utils/ghc-toolchain/src/GHC/Toolchain/CheckArm.hs
- + utils/ghc-toolchain/src/GHC/Toolchain/CheckPower.hs
- + utils/ghc-toolchain/src/GHC/Toolchain/Library.hs
- utils/ghc-toolchain/src/GHC/Toolchain/ParseTriple.hs
- utils/ghc-toolchain/src/GHC/Toolchain/PlatformDetails.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Target.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cc.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cpp.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cxx.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/Link.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Tools/MergeObjs.hs
- utils/ghc-toolchain/src/GHC/Toolchain/Utils.hs
- utils/haddock/CHANGES.md
- utils/haddock/doc/cheatsheet/haddocks.md
- utils/haddock/doc/markup.rst
- utils/haddock/haddock-api/haddock-api.cabal
- utils/haddock/haddock-api/src/Haddock/Backends/Hoogle.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Renderer.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Hyperlinker/Utils.hs
- utils/haddock/haddock-api/src/Haddock/Backends/LaTeX.hs
- utils/haddock/haddock-api/src/Haddock/Backends/Xhtml/Decl.hs
- utils/haddock/haddock-api/src/Haddock/Convert.hs
- utils/haddock/haddock-api/src/Haddock/GhcUtils.hs
- utils/haddock/haddock-api/src/Haddock/Interface.hs
- utils/haddock/haddock-api/src/Haddock/Interface/AttachInstances.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Create.hs
- utils/haddock/haddock-api/src/Haddock/Interface/Rename.hs
- utils/haddock/haddock-api/src/Haddock/InterfaceFile.hs
- utils/haddock/haddock-api/src/Haddock/Types.hs
- utils/haddock/haddock-library/haddock-library.cabal
- utils/haddock/haddock-library/src/Documentation/Haddock/Parser.hs
- utils/haddock/haddock-library/test/Documentation/Haddock/ParserSpec.hs
- utils/haddock/haddock-test/haddock-test.cabal
- utils/haddock/haddock-test/src/Test/Haddock/Config.hs
- utils/haddock/haddock.cabal
- utils/haddock/html-test/ref/Bug1004.html
- utils/haddock/html-test/ref/Bug1050.html
- + utils/haddock/html-test/ref/Bug25739.html
- + utils/haddock/html-test/ref/Bug26246.html
- utils/haddock/html-test/ref/Bug85.html
- utils/haddock/html-test/ref/Bug923.html
- utils/haddock/html-test/ref/BundledPatterns.html
- utils/haddock/html-test/ref/BundledPatterns2.html
- utils/haddock/html-test/ref/ConstructorPatternExport.html
- utils/haddock/html-test/ref/GADTRecords.html
- utils/haddock/html-test/ref/LinearTypes.html
- utils/haddock/html-test/ref/PromotedTypes.html
- + utils/haddock/html-test/ref/RedactTypeSynonyms.html
- + utils/haddock/html-test/src/Bug25739.hs
- + utils/haddock/html-test/src/Bug26246.hs
- + utils/haddock/html-test/src/RedactTypeSynonyms.hs
- utils/haddock/hypsrc-test/Main.hs
- utils/haddock/hypsrc-test/ref/src/Bug1091.html
- utils/haddock/hypsrc-test/ref/src/CPP.html
- utils/haddock/hypsrc-test/ref/src/Classes.html
- utils/haddock/hypsrc-test/ref/src/Constructors.html
- utils/haddock/hypsrc-test/ref/src/Identifiers.html
- utils/haddock/hypsrc-test/ref/src/LinkingIdentifiers.html
- utils/haddock/hypsrc-test/ref/src/Literals.html
- utils/haddock/hypsrc-test/ref/src/Operators.html
- utils/haddock/hypsrc-test/ref/src/Polymorphism.html
- utils/haddock/hypsrc-test/ref/src/PositionPragmas.html
- utils/haddock/hypsrc-test/ref/src/Quasiquoter.html
- utils/haddock/hypsrc-test/ref/src/Records.html
- utils/haddock/hypsrc-test/ref/src/TemplateHaskellQuasiquotes.html
- utils/haddock/hypsrc-test/ref/src/TemplateHaskellSplices.html
- utils/haddock/hypsrc-test/ref/src/Types.html
- utils/haddock/hypsrc-test/ref/src/UsingQuasiquotes.html
- utils/haddock/latex-test/ref/LinearTypes/LinearTypes.tex
- + utils/haddock/latex-test/ref/RedactTypeSynonyms/RedactTypeSynonyms.tex
- + utils/haddock/latex-test/src/RedactTypeSynonyms/RedactTypeSynonyms.hs
- utils/hpc
- utils/hsc2hs
- utils/iserv/iserv.cabal.in
- utils/jsffi/dyld.mjs
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 3 commits: Build external interpreter program on demand (#24731)
by Marge Bot (＠marge-bot) 20 Nov '25
by Marge Bot (＠marge-bot) 20 Nov '25
20 Nov '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
6dddd612 by Sylvain Henry at 2025-11-20T13:02:40-05:00
Build external interpreter program on demand (#24731)
This patch teaches GHC how to build the external interpreter program
when it is missing. As long as we have the `ghci` library, doing this is
trivial so most of this patch is refactoring for doing it sanely.
- - - - -
552f776b by Rodrigo Mesquita at 2025-11-20T13:02:41-05:00
Add tests for #23973 and #26565
These were fixed by 4af4f0f070f83f948e49ad5d7835fd91b8d3f0e6 in !10417
- - - - -
fca892c0 by sheaf at 2025-11-20T13:02:41-05:00
Mark T26410_ffi as fragile on Windows
As seen in #26595, this test intermittently fails on Windows.
This commit marks it as fragile, until we get around to fixing it.
- - - - -
29 changed files:
- compiler/GHC.hs
- + compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Config/Linker.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Linker/Config.hs
- compiler/GHC/Linker/Dynamic.hs
- + compiler/GHC/Linker/Executable.hs
- − compiler/GHC/Linker/ExtraObj.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/MacOS.hs
- compiler/GHC/Linker/Static.hs
- compiler/GHC/Linker/Windows.hs
- + compiler/GHC/Runtime/Interpreter/C.hs
- + compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/SysTools/Tasks.hs
- compiler/ghc.cabal.in
- + testsuite/tests/bytecode/T23973.hs
- + testsuite/tests/bytecode/T23973.script
- + testsuite/tests/bytecode/T23973.stdout
- + testsuite/tests/bytecode/T26565.hs
- + testsuite/tests/bytecode/T26565.script
- + testsuite/tests/bytecode/T26565.stdout
- testsuite/tests/bytecode/all.T
- + testsuite/tests/driver/T24731.hs
- testsuite/tests/driver/all.T
- testsuite/tests/simd/should_run/all.T
- utils/iserv/iserv.cabal.in
Changes:
=====================================
compiler/GHC.hs
=====================================
@@ -337,7 +337,6 @@ module GHC (
import GHC.Prelude hiding (init)
import GHC.Platform
-import GHC.Platform.Ways
import GHC.Driver.Phases ( Phase(..), isHaskellSrcFilename
, isSourceFilename, startPhase )
@@ -351,7 +350,6 @@ import GHC.Driver.Backend
import GHC.Driver.Config.Finder (initFinderOpts)
import GHC.Driver.Config.Parser (initParserOpts)
import GHC.Driver.Config.Logger (initLogFlags)
-import GHC.Driver.Config.StgToJS (initStgToJSConfig)
import GHC.Driver.Config.Diagnostic
import GHC.Driver.Main
import GHC.Driver.Make
@@ -360,10 +358,11 @@ import GHC.Driver.Monad
import GHC.Driver.Ppr
import GHC.ByteCode.Types
-import qualified GHC.Linker.Loader as Loader
import GHC.Runtime.Loader
import GHC.Runtime.Eval
import GHC.Runtime.Interpreter
+import GHC.Runtime.Interpreter.Init
+import GHC.Driver.Config.Interpreter
import GHC.Runtime.Context
import GHCi.RemoteTypes
@@ -439,10 +438,8 @@ import GHC.Unit.Module.ModSummary
import GHC.Unit.Module.Graph
import GHC.Unit.Home.ModInfo
import qualified GHC.Unit.Home.Graph as HUG
-import GHC.Settings
import Control.Applicative ((<|>))
-import Control.Concurrent
import Control.Monad
import Control.Monad.Catch as MC
import Data.Foldable
@@ -715,98 +712,16 @@ setTopSessionDynFlags :: GhcMonad m => DynFlags -> m ()
setTopSessionDynFlags dflags = do
hsc_env <- getSession
logger <- getLogger
- lookup_cache <- liftIO $ mkInterpSymbolCache
-
- -- see Note [Target code interpreter]
- interp <- if
-#if !defined(wasm32_HOST_ARCH)
- -- Wasm dynamic linker
- | ArchWasm32 <- platformArch $ targetPlatform dflags
- -> do
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- dyld <- liftIO $ makeAbsolute $ topDir dflags </> "dyld.mjs"
- libdir <- liftIO $ last <$> Loader.getGccSearchDirectory logger dflags "libraries"
- let profiled = ways dflags `hasWay` WayProf
- way_tag = if profiled then "_p" else ""
- let cfg =
- WasmInterpConfig
- { wasmInterpDyLD = dyld,
- wasmInterpLibDir = libdir,
- wasmInterpOpts = getOpts dflags opt_i,
- wasmInterpBrowser = gopt Opt_GhciBrowser dflags,
- wasmInterpBrowserHost = ghciBrowserHost dflags,
- wasmInterpBrowserPort = ghciBrowserPort dflags,
- wasmInterpBrowserRedirectWasiConsole = gopt Opt_GhciBrowserRedirectWasiConsole dflags,
- wasmInterpBrowserPuppeteerLaunchOpts = ghciBrowserPuppeteerLaunchOpts dflags,
- wasmInterpBrowserPlaywrightBrowserType = ghciBrowserPlaywrightBrowserType dflags,
- wasmInterpBrowserPlaywrightLaunchOpts = ghciBrowserPlaywrightLaunchOpts dflags,
- wasmInterpTargetPlatform = targetPlatform dflags,
- wasmInterpProfiled = profiled,
- wasmInterpHsSoSuffix = way_tag ++ dynLibSuffix (ghcNameVersion dflags),
- wasmInterpUnitState = ue_homeUnitState $ hsc_unit_env hsc_env
- }
- pure $ Just $ Interp (ExternalInterp $ ExtWasm $ ExtInterpState cfg s) loader lookup_cache
-#endif
-
- -- JavaScript interpreter
- | ArchJavaScript <- platformArch (targetPlatform dflags)
- -> do
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- let cfg = JSInterpConfig
- { jsInterpNodeConfig = defaultNodeJsSettings
- , jsInterpScript = topDir dflags </> "ghc-interp.js"
- , jsInterpTmpFs = hsc_tmpfs hsc_env
- , jsInterpTmpDir = tmpDir dflags
- , jsInterpLogger = hsc_logger hsc_env
- , jsInterpCodegenCfg = initStgToJSConfig dflags
- , jsInterpUnitEnv = hsc_unit_env hsc_env
- , jsInterpFinderOpts = initFinderOpts dflags
- , jsInterpFinderCache = hsc_FC hsc_env
- }
- return (Just (Interp (ExternalInterp (ExtJS (ExtInterpState cfg s))) loader lookup_cache))
-
- -- external interpreter
- | gopt Opt_ExternalInterpreter dflags
- -> do
- let
- prog = pgm_i dflags ++ flavour
- profiled = ways dflags `hasWay` WayProf
- dynamic = ways dflags `hasWay` WayDyn
- flavour
- | profiled && dynamic = "-prof-dyn"
- | profiled = "-prof"
- | dynamic = "-dyn"
- | otherwise = ""
- msg = text "Starting " <> text prog
- tr <- if verbosity dflags >= 3
- then return (logInfo logger $ withPprStyle defaultDumpStyle msg)
- else return (pure ())
- let
- conf = IServConfig
- { iservConfProgram = prog
- , iservConfOpts = getOpts dflags opt_i
- , iservConfProfiled = profiled
- , iservConfDynamic = dynamic
- , iservConfHook = createIservProcessHook (hsc_hooks hsc_env)
- , iservConfTrace = tr
- }
- s <- liftIO $ newMVar InterpPending
- loader <- liftIO Loader.uninitializedLoader
- return (Just (Interp (ExternalInterp (ExtIServ (ExtInterpState conf s))) loader lookup_cache))
-
- -- Internal interpreter
- | otherwise
- ->
-#if defined(HAVE_INTERNAL_INTERPRETER)
- do
- loader <- liftIO Loader.uninitializedLoader
- return (Just (Interp InternalInterp loader lookup_cache))
-#else
- return Nothing
-#endif
-
+ let platform = targetPlatform dflags
+ let unit_env = hsc_unit_env hsc_env
+ let tmpfs = hsc_tmpfs hsc_env
+ let finder_cache = hsc_FC hsc_env
+ interp_opts' <- liftIO $ initInterpOpts dflags
+ let interp_opts = interp_opts'
+ { interpCreateProcess = createIservProcessHook (hsc_hooks hsc_env)
+ }
+
+ interp <- liftIO $ initInterpreter tmpfs logger platform finder_cache unit_env interp_opts
modifySession $ \h -> hscSetFlags dflags
h{ hsc_IC = (hsc_IC h){ ic_dflags = dflags }
=====================================
compiler/GHC/Driver/Config/Interpreter.hs
=====================================
@@ -0,0 +1,46 @@
+module GHC.Driver.Config.Interpreter
+ ( initInterpOpts
+ )
+where
+
+import GHC.Prelude
+import GHC.Runtime.Interpreter.Init
+import GHC.Driver.DynFlags
+import GHC.Driver.Session
+import GHC.Driver.Config.Finder
+import GHC.Driver.Config.StgToJS
+import GHC.SysTools.Tasks
+import GHC.Linker.Executable
+
+import System.FilePath
+import System.Directory
+
+initInterpOpts :: DynFlags -> IO InterpOpts
+initInterpOpts dflags = do
+ wasm_dyld <- makeAbsolute $ topDir dflags </> "dyld.mjs"
+ js_interp <- makeAbsolute $ topDir dflags </> "ghc-interp.js"
+ pure $ InterpOpts
+ { interpExternal = gopt Opt_ExternalInterpreter dflags
+ , interpProg = pgm_i dflags
+ , interpOpts = getOpts dflags opt_i
+ , interpWays = ways dflags
+ , interpNameVer = ghcNameVersion dflags
+ , interpCreateProcess = Nothing
+ , interpWasmDyld = wasm_dyld
+ , interpBrowser = gopt Opt_GhciBrowser dflags
+ , interpBrowserHost = ghciBrowserHost dflags
+ , interpBrowserPort = ghciBrowserPort dflags
+ , interpBrowserRedirectWasiConsole = gopt Opt_GhciBrowserRedirectWasiConsole dflags
+ , interpBrowserPuppeteerLaunchOpts = ghciBrowserPuppeteerLaunchOpts dflags
+ , interpBrowserPlaywrightBrowserType = ghciBrowserPlaywrightBrowserType dflags
+ , interpBrowserPlaywrightLaunchOpts = ghciBrowserPlaywrightLaunchOpts dflags
+ , interpJsInterp = js_interp
+ , interpTmpDir = tmpDir dflags
+ , interpJsCodegenCfg = initStgToJSConfig dflags
+ , interpFinderOpts = initFinderOpts dflags
+ , interpVerbosity = verbosity dflags
+ , interpLdConfig = configureLd dflags
+ , interpCcConfig = configureCc dflags
+ , interpExecutableLinkOpts = initExecutableLinkOpts dflags
+ }
+
=====================================
compiler/GHC/Driver/Config/Linker.hs
=====================================
@@ -10,6 +10,7 @@ import GHC.Linker.Config
import GHC.Driver.DynFlags
import GHC.Driver.Session
+import GHC.Settings
import Data.List (isPrefixOf)
@@ -52,6 +53,8 @@ initLinkerConfig dflags =
, linkerOptionsPost = post_args
, linkerTempDir = tmpDir dflags
, linkerFilter = ld_filter
+ , linkerSupportsCompactUnwind = toolSettings_ldSupportsCompactUnwind (toolSettings dflags)
+ , linkerIsGnuLd = toolSettings_ldIsGnuLd (toolSettings dflags)
}
{- Note [Solaris linker]
=====================================
compiler/GHC/Driver/DynFlags.hs
=====================================
@@ -28,7 +28,7 @@ module GHC.Driver.DynFlags (
ParMakeCount(..),
ways,
HasDynFlags(..), ContainsDynFlags(..),
- RtsOptsEnabled(..),
+ RtsOptsEnabled(..), haveRtsOptsFlags,
GhcMode(..), isOneShot,
GhcLink(..), isNoLink,
PackageFlag(..), PackageArg(..), ModRenaming(..),
@@ -902,6 +902,13 @@ data RtsOptsEnabled
| RtsOptsAll
deriving (Show)
+haveRtsOptsFlags :: DynFlags -> Bool
+haveRtsOptsFlags dflags =
+ isJust (rtsOpts dflags) || case rtsOptsEnabled dflags of
+ RtsOptsSafeOnly -> False
+ _ -> True
+
+
-- | Are we building with @-fPIE@ or @-fPIC@ enabled?
positionIndependent :: DynFlags -> Bool
positionIndependent dflags = gopt Opt_PIC dflags || gopt Opt_PIE dflags
=====================================
compiler/GHC/Driver/Pipeline.hs
=====================================
@@ -71,7 +71,7 @@ import GHC.SysTools
import GHC.SysTools.Cpp
import GHC.Utils.TmpFs
-import GHC.Linker.ExtraObj
+import GHC.Linker.Executable
import GHC.Linker.Static
import GHC.Linker.Static.Utils
import GHC.Linker.Types
@@ -444,7 +444,9 @@ link' logger tmpfs fc dflags unit_env batch_attempt_linking mHscMessager hpt
case ghcLink dflags of
LinkBinary
| backendUseJSLinker (backend dflags) -> linkJSBinary logger tmpfs fc dflags unit_env obj_files pkg_deps
- | otherwise -> linkBinary logger tmpfs dflags unit_env obj_files pkg_deps
+ | otherwise -> do
+ let opts = initExecutableLinkOpts dflags
+ linkExecutable logger tmpfs opts unit_env obj_files pkg_deps
LinkStaticLib -> linkStaticLib logger dflags unit_env obj_files pkg_deps
LinkDynLib -> linkDynLibCheck logger tmpfs dflags unit_env obj_files pkg_deps
other -> panicBadLink other
@@ -511,7 +513,8 @@ linkingNeeded logger dflags unit_env staticLink linkables pkg_deps = do
if not (null lib_errs) || any (t <) lib_times
then return $ needsRecompileBecause LibraryChanged
else do
- res <- checkLinkInfo logger dflags unit_env pkg_deps exe_file
+ let opts = initExecutableLinkOpts dflags
+ res <- checkLinkInfo logger opts unit_env pkg_deps exe_file
if res
then return $ needsRecompileBecause FlagsChanged
else return UpToDate
@@ -585,7 +588,9 @@ doLink hsc_env o_files = do
LinkBinary
| backendUseJSLinker (backend dflags)
-> linkJSBinary logger tmpfs fc dflags unit_env o_files []
- | otherwise -> linkBinary logger tmpfs dflags unit_env o_files []
+ | otherwise -> do
+ let opts = initExecutableLinkOpts dflags
+ linkExecutable logger tmpfs opts unit_env o_files []
LinkStaticLib -> linkStaticLib logger dflags unit_env o_files []
LinkDynLib -> linkDynLibCheck logger tmpfs dflags unit_env o_files []
LinkMergedObj
=====================================
compiler/GHC/Driver/Pipeline/Execute.hs
=====================================
@@ -15,6 +15,7 @@ import Control.Monad
import Control.Monad.IO.Class
import Control.Monad.Catch
import GHC.Driver.Hooks
+import GHC.Driver.DynFlags
import Control.Monad.Trans.Reader
import GHC.Driver.Pipeline.Monad
import GHC.Driver.Pipeline.Phases
@@ -74,7 +75,6 @@ import GHC.CmmToLlvm.Version.Type (LlvmVersion (..))
import {-# SOURCE #-} GHC.Driver.Pipeline (compileForeign, compileEmptyStub)
import GHC.Settings
import System.IO
-import GHC.Linker.ExtraObj
import GHC.Linker.Dynamic
import GHC.Utils.Panic
import GHC.Utils.Touch
@@ -416,6 +416,7 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
let unit_env = hsc_unit_env hsc_env
let home_unit = hsc_home_unit_maybe hsc_env
let tmpfs = hsc_tmpfs hsc_env
+ let tmpdir = tmpDir dflags
let platform = ue_platform unit_env
let hcc = cc_phase `eqPhase` HCc
@@ -437,7 +438,7 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
let include_paths = include_paths_quote ++ include_paths_global
let gcc_extra_viac_flags = extraGccViaCFlags dflags
- let pic_c_flags = picCCOpts dflags
+ let cc_config = configureCc dflags
let verbFlags = getVerbFlags dflags
@@ -486,14 +487,14 @@ runCcPhase cc_phase pipe_env hsc_env location input_fn = do
ghcVersionH <- getGhcVersionIncludeFlags dflags unit_env
withAtomicRename output_fn $ \temp_outputFilename ->
- GHC.SysTools.runCc (phaseForeignLanguage cc_phase) logger tmpfs dflags (
+ GHC.SysTools.runCc (phaseForeignLanguage cc_phase) logger tmpfs tmpdir cc_config (
[ GHC.SysTools.Option "-c"
, GHC.SysTools.FileOption "" input_fn
, GHC.SysTools.Option "-o"
, GHC.SysTools.FileOption "" temp_outputFilename
]
++ map GHC.SysTools.Option (
- pic_c_flags
+ (ccPicOpts cc_config)
-- See Note [Produce big objects on Windows]
++ [ "-Wa,-mbig-obj"
@@ -1149,7 +1150,8 @@ joinObjectFiles hsc_env o_files output_fn
| otherwise = do
withAtomicRename output_fn $ \tmp_ar ->
- liftIO $ runAr logger dflags Nothing $ map Option $ ["qc" ++ dashL, tmp_ar] ++ o_files
+ let ar_opts = configureAr dflags
+ in liftIO $ runAr logger ar_opts Nothing $ map Option $ ["qc" ++ dashL, tmp_ar] ++ o_files
where
dashLSupported = sArSupportsDashL (settings dflags)
dashL = if dashLSupported then "L" else ""
=====================================
compiler/GHC/Linker/Config.hs
=====================================
@@ -23,5 +23,7 @@ data LinkerConfig = LinkerConfig
, linkerOptionsPost :: [Option] -- ^ Linker options (after user options)
, linkerTempDir :: TempDir -- ^ Temporary directory to use
, linkerFilter :: [String] -> [String] -- ^ Output filter
+ , linkerSupportsCompactUnwind :: !Bool -- ^ Does the linker support compact unwind
+ , linkerIsGnuLd :: !Bool -- ^ Is it GNU LD (used for gc-sections support)
}
=====================================
compiler/GHC/Linker/Dynamic.hs
=====================================
@@ -12,6 +12,7 @@ import GHC.Prelude
import GHC.Platform
import GHC.Platform.Ways
import GHC.Settings (ToolSettings(toolSettings_ldSupportsSingleModule))
+import GHC.SysTools.Tasks
import GHC.Driver.Config.Linker
import GHC.Driver.Session
@@ -207,8 +208,10 @@ linkDynLib logger tmpfs dflags0 unit_env o_files dep_packages
++ [ Option "-Wl,-dead_strip_dylibs", Option "-Wl,-headerpad,8000" ]
)
-- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
- when (gopt Opt_RPath dflags) $
- runInjectRPaths logger (toolSettings dflags) pkg_lib_paths output_fn
+ when (gopt Opt_RPath dflags) $ do
+ let otool_opts = configureOtool dflags
+ let install_name_opts = configureInstallName dflags
+ runInjectRPaths logger otool_opts install_name_opts pkg_lib_paths output_fn
_ -> do
-------------------------------------------------------------------
-- Making a DSO
=====================================
compiler/GHC/Linker/Executable.hs
=====================================
@@ -0,0 +1,534 @@
+-- | Linking executables
+module GHC.Linker.Executable
+ ( linkExecutable
+ , ExecutableLinkOpts (..)
+ , initExecutableLinkOpts
+ -- RTS Opts
+ , RtsOptsEnabled (..)
+ -- * Link info
+ , LinkInfo (..)
+ , initLinkInfo
+ , checkLinkInfo
+ , ghcLinkInfoSectionName
+ , ghcLinkInfoNoteName
+ , platformSupportsSavingLinkOpts
+ )
+where
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Platform.Ways
+
+import GHC.Unit
+import GHC.Unit.Env
+
+import GHC.Utils.Asm
+import GHC.Utils.Error
+import GHC.Utils.Misc
+import GHC.Utils.Outputable as Outputable
+import GHC.Utils.Logger
+import GHC.Utils.TmpFs
+
+import GHC.Driver.Session
+import GHC.Driver.Config.Linker
+
+import qualified GHC.Data.ShortText as ST
+
+import GHC.SysTools
+import GHC.SysTools.Elf
+import GHC.Linker.Config
+import GHC.Linker.Unit
+import GHC.Linker.MacOS
+import GHC.Linker.Windows
+import GHC.Linker.Dynamic (libmLinkOpts)
+import GHC.Linker.External (runLink)
+import GHC.Linker.Static.Utils (exeFileName)
+
+import Control.Monad
+import Data.Maybe
+import System.FilePath
+import System.Directory
+
+data ExecutableLinkOpts = ExecutableLinkOpts
+ { leOutputFile :: Maybe FilePath
+ , leNameVersion :: GhcNameVersion
+ , leWays :: Ways
+ , leDynLibLoader :: DynLibLoader
+ , leRelativeDynlibPaths :: !Bool
+ , leUseXLinkerRPath :: !Bool
+ , leSingleLibFolder :: !Bool
+ , leWholeArchiveHsLibs :: !Bool
+ , leGenManifest :: !Bool
+ , leRPath :: !Bool
+ , leCompactUnwind :: !Bool
+ , leLibraryPaths :: [String]
+ , leFrameworkOpts :: FrameworkOpts
+ , leManifestOpts :: ManifestOpts
+ , leLinkerConfig :: LinkerConfig
+ , leOtoolConfig :: OtoolConfig
+ , leCcConfig :: CcConfig
+ , leInstallNameConfig :: InstallNameConfig
+ , leInputs :: [Option]
+ , lePieOpts :: [String]
+ , leTempDir :: TempDir
+ , leVerbFlags :: [String]
+ , leNoHsMain :: !Bool
+ , leMainSymbol :: String
+ , leRtsOptsEnabled :: !RtsOptsEnabled
+ , leRtsOptsSuggestions :: !Bool
+ , leKeepCafs :: !Bool
+ , leRtsOpts :: Maybe String
+ }
+
+initExecutableLinkOpts :: DynFlags -> ExecutableLinkOpts
+initExecutableLinkOpts dflags =
+ let
+ platform = targetPlatform dflags
+ os = platformOS platform
+ in ExecutableLinkOpts
+ { leOutputFile = outputFile_ dflags
+ , leNameVersion = ghcNameVersion dflags
+ , leWays = ways dflags
+ , leDynLibLoader = dynLibLoader dflags
+ , leRelativeDynlibPaths = gopt Opt_RelativeDynlibPaths dflags
+ , leUseXLinkerRPath = useXLinkerRPath dflags os
+ , leSingleLibFolder = gopt Opt_SingleLibFolder dflags
+ , leWholeArchiveHsLibs = gopt Opt_WholeArchiveHsLibs dflags
+ , leGenManifest = gopt Opt_GenManifest dflags
+ , leRPath = gopt Opt_RPath dflags
+ , leCompactUnwind = gopt Opt_CompactUnwind dflags
+ , leLibraryPaths = libraryPaths dflags
+ , leFrameworkOpts = initFrameworkOpts dflags
+ , leManifestOpts = initManifestOpts dflags
+ , leLinkerConfig = initLinkerConfig dflags
+ , leCcConfig = configureCc dflags
+ , leOtoolConfig = configureOtool dflags
+ , leInstallNameConfig = configureInstallName dflags
+ , leInputs = ldInputs dflags
+ , lePieOpts = pieCCLDOpts dflags
+ , leTempDir = tmpDir dflags
+ , leVerbFlags = getVerbFlags dflags
+ , leNoHsMain = gopt Opt_NoHsMain dflags
+ , leMainSymbol = "ZCMain_main"
+ , leRtsOptsEnabled = rtsOptsEnabled dflags
+ , leRtsOptsSuggestions = rtsOptsSuggestions dflags
+ , leKeepCafs = gopt Opt_KeepCAFs dflags
+ , leRtsOpts = rtsOpts dflags
+ }
+
+leHaveRtsOptsFlags :: ExecutableLinkOpts -> Bool
+leHaveRtsOptsFlags opts =
+ isJust (leRtsOpts opts)
+ || case leRtsOptsEnabled opts of
+ RtsOptsSafeOnly -> False
+ _ -> True
+
+linkExecutable :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
+linkExecutable logger tmpfs opts unit_env o_files dep_units = do
+ let static_link = False
+ let platform = ue_platform unit_env
+ unit_state = ue_homeUnitState unit_env
+ verbFlags = leVerbFlags opts
+ arch_os = platformArchOS platform
+ output_fn = exeFileName arch_os static_link (leOutputFile opts)
+ namever = leNameVersion opts
+ -- For the wasm target, when ghc is invoked with -dynamic,
+ -- when linking the final .wasm binary we must still ensure
+ -- the static archives are selected. Otherwise wasm-ld would
+ -- fail to find and link the .so library dependencies. wasm-ld
+ -- can link PIC objects into static .wasm binaries fine, so we
+ -- only adjust the ways in the final linking step, and only
+ -- when linking .wasm binary (which is supposed to be fully
+ -- static), not when linking .so shared libraries.
+ ways_
+ | ArchWasm32 <- platformArch platform = removeWay WayDyn $ leWays opts
+ | otherwise = leWays opts
+
+ full_output_fn <- if isAbsolute output_fn
+ then return output_fn
+ else do d <- getCurrentDirectory
+ return $ normalise (d </> output_fn)
+
+ -- get the full list of packages to link with, by combining the
+ -- explicit packages with the auto packages and all of their
+ -- dependencies, and eliminating duplicates.
+ pkgs <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_units)
+ let pkg_lib_paths = collectLibraryDirs ways_ pkgs
+ let pkg_lib_path_opts = concatMap get_pkg_lib_path_opts pkg_lib_paths
+ get_pkg_lib_path_opts l
+ | osElfTarget (platformOS platform) &&
+ leDynLibLoader opts == SystemDependent &&
+ ways_ `hasWay` WayDyn
+ = let libpath = if leRelativeDynlibPaths opts
+ then "$ORIGIN" </>
+ (l `makeRelativeTo` full_output_fn)
+ else l
+ -- See Note [-Xlinker -rpath vs -Wl,-rpath]
+ rpath = if leUseXLinkerRPath opts
+ then ["-Xlinker", "-rpath", "-Xlinker", libpath]
+ else []
+ -- Solaris 11's linker does not support -rpath-link option. It silently
+ -- ignores it and then complains about next option which is -l<some
+ -- dir> as being a directory and not expected object file, E.g
+ -- ld: elf error: file
+ -- /tmp/ghc-src/libraries/base/dist-install/build:
+ -- elf_begin: I/O error: region read: Is a directory
+ rpathlink = if (platformOS platform) == OSSolaris2
+ then []
+ else ["-Xlinker", "-rpath-link", "-Xlinker", l]
+ in ["-L" ++ l] ++ rpathlink ++ rpath
+ | osMachOTarget (platformOS platform) &&
+ leDynLibLoader opts == SystemDependent &&
+ ways_ `hasWay` WayDyn &&
+ leUseXLinkerRPath opts
+ = let libpath = if leRelativeDynlibPaths opts
+ then "@loader_path" </>
+ (l `makeRelativeTo` full_output_fn)
+ else l
+ in ["-L" ++ l] ++ ["-Xlinker", "-rpath", "-Xlinker", libpath]
+ | otherwise = ["-L" ++ l]
+
+ pkg_lib_path_opts <-
+ if leSingleLibFolder opts
+ then do
+ libs <- getLibs namever ways_ unit_env dep_units
+ tmpDir <- newTempSubDir logger tmpfs (leTempDir opts)
+ sequence_ [ copyFile lib (tmpDir </> basename)
+ | (lib, basename) <- libs]
+ return [ "-L" ++ tmpDir ]
+ else pure pkg_lib_path_opts
+
+ let
+ dead_strip
+ | leWholeArchiveHsLibs opts = []
+ | otherwise = if osSubsectionsViaSymbols (platformOS platform)
+ then ["-Wl,-dead_strip"]
+ else []
+ let lib_paths = leLibraryPaths opts
+ let lib_path_opts = map ("-L"++) lib_paths
+
+ extraLinkObj <- maybeToList <$> mkExtraObjToLinkIntoBinary logger tmpfs opts unit_state
+ noteLinkObjs <- mkNoteObjsToLinkIntoBinary logger tmpfs opts unit_env dep_units
+
+ let
+ (pre_hs_libs, post_hs_libs)
+ | leWholeArchiveHsLibs opts
+ = if platformOS platform == OSDarwin
+ then (["-Wl,-all_load"], [])
+ -- OS X does not have a flag to turn off -all_load
+ else (["-Wl,--whole-archive"], ["-Wl,--no-whole-archive"])
+ | otherwise
+ = ([],[])
+
+ pkg_link_opts <- do
+ unit_link_opts <- getUnitLinkOpts namever ways_ unit_env dep_units
+ return $ otherFlags unit_link_opts ++ dead_strip
+ ++ pre_hs_libs ++ hsLibs unit_link_opts ++ post_hs_libs
+ ++ extraLibs unit_link_opts
+ -- -Wl,-u,<sym> contained in other_flags
+ -- needs to be put before -l<package>,
+ -- otherwise Solaris linker fails linking
+ -- a binary with unresolved symbols in RTS
+ -- which are defined in base package
+ -- the reason for this is a note in ld(1) about
+ -- '-u' option: "The placement of this option
+ -- on the command line is significant.
+ -- This option must be placed before the library
+ -- that defines the symbol."
+
+ -- frameworks
+ pkg_framework_opts <- getUnitFrameworkOpts unit_env dep_units
+ let framework_opts = getFrameworkOpts (leFrameworkOpts opts) platform
+
+ -- probably _stub.o files
+ let extra_ld_inputs = leInputs opts
+
+ rc_objs <- case platformOS platform of
+ OSMinGW32 | leGenManifest opts -> maybeCreateManifest logger tmpfs (leManifestOpts opts) output_fn
+ _ -> return []
+
+ let linker_config = leLinkerConfig opts
+ let args = ( map GHC.SysTools.Option verbFlags
+ ++ [ GHC.SysTools.Option "-o"
+ , GHC.SysTools.FileOption "" output_fn
+ ]
+ ++ libmLinkOpts platform
+ ++ map GHC.SysTools.Option (
+ []
+
+ -- See Note [No PIE when linking]
+ ++ lePieOpts opts
+
+ -- Permit the linker to auto link _symbol to _imp_symbol.
+ -- This lets us link against DLLs without needing an "import library".
+ ++ (if platformOS platform == OSMinGW32
+ then ["-Wl,--enable-auto-import"]
+ else [])
+
+ -- '-no_compact_unwind'
+ -- C++/Objective-C exceptions cannot use optimised
+ -- stack unwinding code. The optimised form is the
+ -- default in Xcode 4 on at least x86_64, and
+ -- without this flag we're also seeing warnings
+ -- like
+ -- ld: warning: could not create compact unwind for .LFB3: non-standard register 5 being saved in prolog
+ -- on x86.
+ ++ (if not (leCompactUnwind opts) &&
+ linkerSupportsCompactUnwind (leLinkerConfig opts) &&
+ (platformOS platform == OSDarwin) &&
+ case platformArch platform of
+ ArchX86_64 -> True
+ ArchAArch64 -> True
+ _ -> False
+ then ["-Wl,-no_compact_unwind"]
+ else [])
+
+ -- We should rather be asking does it support --gc-sections?
+ ++ (if linkerIsGnuLd (leLinkerConfig opts) &&
+ not (leWholeArchiveHsLibs opts)
+ then ["-Wl,--gc-sections"]
+ else [])
+
+ ++ o_files
+ ++ lib_path_opts)
+ ++ extra_ld_inputs
+ ++ map GHC.SysTools.Option (
+ rc_objs
+ ++ framework_opts
+ ++ pkg_lib_path_opts
+ ++ extraLinkObj
+ ++ noteLinkObjs
+ -- See Note [RTS/ghc-internal interface]
+ -- (-u<sym> must come before -lghc-internal...!)
+ ++ (if ghcInternalUnitId `elem` map unitId pkgs
+ then [concat [ "-Wl,-u,"
+ , ['_' | platformLeadingUnderscore platform]
+ , "init_ghc_hs_iface" ]]
+ else [])
+ ++ pkg_link_opts
+ ++ pkg_framework_opts
+ ++ (if platformOS platform == OSDarwin
+ -- dead_strip_dylibs, will remove unused dylibs, and thus save
+ -- space in the load commands. The -headerpad is necessary so
+ -- that we can inject more @rpath's later for the left over
+ -- libraries during runInjectRpaths phase.
+ --
+ -- See Note [Dynamic linking on macOS].
+ then [ "-Wl,-dead_strip_dylibs", "-Wl,-headerpad,8000" ]
+ else [])
+ ))
+
+ runLink logger tmpfs linker_config args
+
+ -- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
+ when (platformOS platform == OSDarwin && leRPath opts) $
+ GHC.Linker.MacOS.runInjectRPaths logger (leOtoolConfig opts) (leInstallNameConfig opts) pkg_lib_paths output_fn
+
+mkExtraObj :: Logger -> TmpFs -> TempDir -> CcConfig -> UnitState -> Suffix -> String -> IO FilePath
+mkExtraObj logger tmpfs tmpdir cc_config unit_state extn xs
+ = do
+ -- Pass a different set of options to the C compiler depending one whether
+ -- we're compiling C or assembler. When compiling C, we pass the usual
+ -- set of include directories and PIC flags.
+ let cOpts = map Option (ccPicOpts cc_config)
+ ++ map (FileOption "-I" . ST.unpack)
+ (unitIncludeDirs $ unsafeLookupUnit unit_state rtsUnit)
+ cFile <- newTempName logger tmpfs tmpdir TFL_CurrentModule extn
+ oFile <- newTempName logger tmpfs tmpdir TFL_GhcSession "o"
+ writeFile cFile xs
+ runCc Nothing logger tmpfs tmpdir cc_config
+ ([Option "-c",
+ FileOption "" cFile,
+ Option "-o",
+ FileOption "" oFile]
+ ++ if extn /= "s"
+ then cOpts
+ else [])
+ return oFile
+
+-- | Create object containing main() entry point
+--
+-- When linking a binary, we need to create a C main() function that
+-- starts everything off. This used to be compiled statically as part
+-- of the RTS, but that made it hard to change the -rtsopts setting,
+-- so now we generate and compile a main() stub as part of every
+-- binary and pass the -rtsopts setting directly to the RTS (#5373)
+mkExtraObjToLinkIntoBinary :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitState -> IO (Maybe FilePath)
+mkExtraObjToLinkIntoBinary logger tmpfs opts unit_state = do
+ when (leNoHsMain opts && leHaveRtsOptsFlags opts) $
+ logInfo logger $ withPprStyle defaultUserStyle
+ (text "Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main." $$
+ text " Call hs_init_ghc() from your main() function to set these options.")
+
+ if leNoHsMain opts
+ -- Don't try to build the extra object if it is not needed. Compiling the
+ -- extra object assumes the presence of the RTS in the unit database
+ -- (because the extra object imports Rts.h) but GHC's build system may try
+ -- to build some helper programs before building and registering the RTS!
+ -- See #18938 for an example where hp2ps failed to build because of a failed
+ -- (unsafe) lookup for the RTS in the unit db.
+ then pure Nothing
+ else mk_extra_obj exeMain
+
+ where
+ tmpdir = leTempDir opts
+ cc_config = leCcConfig opts
+ mk_extra_obj = fmap Just . mkExtraObj logger tmpfs tmpdir cc_config unit_state "c" . renderWithContext defaultSDocContext
+
+ exeMain = vcat [
+ text "#include <Rts.h>",
+ text "extern StgClosure " <> text (leMainSymbol opts) <> text "_closure;",
+ text "int main(int argc, char *argv[])",
+ char '{',
+ text " RtsConfig __conf = defaultRtsConfig;",
+ text " __conf.rts_opts_enabled = "
+ <> text (show (leRtsOptsEnabled opts)) <> semi,
+ text " __conf.rts_opts_suggestions = "
+ <> (if leRtsOptsSuggestions opts
+ then text "true"
+ else text "false") <> semi,
+ text "__conf.keep_cafs = "
+ <> (if leKeepCafs opts
+ then text "true"
+ else text "false") <> semi,
+ case leRtsOpts opts of
+ Nothing -> Outputable.empty
+ Just rts_opts -> text " __conf.rts_opts= " <>
+ text (show rts_opts) <> semi,
+ text " __conf.rts_hs_main = true;",
+ text " return hs_main(argc,argv,&" <> text (leMainSymbol opts) <> text "_closure,__conf);",
+ char '}',
+ char '\n' -- final newline, to keep gcc happy
+ ]
+
+-- Write out the link info section into a new assembly file. Previously
+-- this was included as inline assembly in the main.c file but this
+-- is pretty fragile. gas gets upset trying to calculate relative offsets
+-- that span the .note section (notably .text) when debug info is present
+mkNoteObjsToLinkIntoBinary :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> [UnitId] -> IO [FilePath]
+mkNoteObjsToLinkIntoBinary logger tmpfs opts unit_env dep_packages = do
+ link_info <- initLinkInfo opts unit_env dep_packages
+
+ if (platformSupportsSavingLinkOpts (platformOS platform ))
+ then fmap (:[]) $ mkExtraObj logger tmpfs tmpdir cc_config unit_state "s" (renderWithContext defaultSDocContext (link_opts link_info))
+ else return []
+
+ where
+ unit_state = ue_homeUnitState unit_env
+ platform = ue_platform unit_env
+ tmpdir = leTempDir opts
+ cc_config = leCcConfig opts
+ link_opts info = hcat
+ [ -- "link info" section (see Note [LinkInfo section])
+ makeElfNote platform ghcLinkInfoSectionName ghcLinkInfoNoteName 0 (show info)
+
+ -- ALL generated assembly must have this section to disable
+ -- executable stacks. See also
+ -- "GHC.CmmToAsm" for another instance
+ -- where we need to do this.
+ , if platformHasGnuNonexecStack platform
+ then text ".section .note.GNU-stack,\"\","
+ <> sectionType platform "progbits" <> char '\n'
+ else Outputable.empty
+ ]
+
+data LinkInfo = LinkInfo
+ { liPkgLinkOpts :: UnitLinkOpts
+ , liPkgFrameworks :: [String]
+ , liRtsOpts :: Maybe String
+ , liRtsOptsEnabled :: !RtsOptsEnabled
+ , liNoHsMain :: !Bool
+ , liLdInputs :: [String]
+ , liLdOpts :: [String]
+ }
+ deriving (Show)
+
+
+-- | Return the "link info"
+--
+-- See Note [LinkInfo section]
+initLinkInfo :: ExecutableLinkOpts -> UnitEnv -> [UnitId] -> IO LinkInfo
+initLinkInfo opts unit_env dep_packages = do
+ package_link_opts <- getUnitLinkOpts (leNameVersion opts) (leWays opts) unit_env dep_packages
+ pkg_frameworks <- if not (platformUsesFrameworks (ue_platform unit_env))
+ then return []
+ else do
+ ps <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_packages)
+ return (collectFrameworks ps)
+ pure $ LinkInfo
+ { liPkgLinkOpts = package_link_opts
+ , liPkgFrameworks = pkg_frameworks
+ , liRtsOpts = leRtsOpts opts
+ , liRtsOptsEnabled = leRtsOptsEnabled opts
+ , liNoHsMain = leNoHsMain opts
+ , liLdInputs = map showOpt (leInputs opts)
+ , liLdOpts = map showOpt (linkerOptionsPost (leLinkerConfig opts))
+ }
+
+platformSupportsSavingLinkOpts :: OS -> Bool
+platformSupportsSavingLinkOpts os
+ | os == OSSolaris2 = False -- see #5382
+ | otherwise = osElfTarget os
+
+-- See Note [LinkInfo section]
+ghcLinkInfoSectionName :: String
+ghcLinkInfoSectionName = ".debug-ghc-link-info"
+ -- if we use the ".debug" prefix, then strip will strip it by default
+
+-- Identifier for the note (see Note [LinkInfo section])
+ghcLinkInfoNoteName :: String
+ghcLinkInfoNoteName = "GHC link info"
+
+-- Returns 'False' if it was, and we can avoid linking, because the
+-- previous binary was linked with "the same options".
+checkLinkInfo :: Logger -> ExecutableLinkOpts -> UnitEnv -> [UnitId] -> FilePath -> IO Bool
+checkLinkInfo logger opts unit_env pkg_deps exe_file
+ | not (platformSupportsSavingLinkOpts (platformOS (ue_platform unit_env)))
+ -- ToDo: Windows and OS X do not use the ELF binary format, so
+ -- readelf does not work there. We need to find another way to do
+ -- this.
+ = return False -- conservatively we should return True, but not
+ -- linking in this case was the behaviour for a long
+ -- time so we leave it as-is.
+ | otherwise
+ = do
+ link_info <- initLinkInfo opts unit_env pkg_deps
+ debugTraceMsg logger 3 $ text ("Link info: " ++ show link_info)
+ m_exe_link_info <- readElfNoteAsString logger exe_file
+ ghcLinkInfoSectionName ghcLinkInfoNoteName
+ let sameLinkInfo = (Just (show link_info) == m_exe_link_info)
+ debugTraceMsg logger 3 $ case m_exe_link_info of
+ Nothing -> text "Exe link info: Not found"
+ Just s
+ | sameLinkInfo -> text ("Exe link info is the same")
+ | otherwise -> text ("Exe link info is different: " ++ s)
+ return (not sameLinkInfo)
+
+{- Note [LinkInfo section]
+ ~~~~~~~~~~~~~~~~~~~~~~~
+
+The "link info" is a string representing the parameters of the link. We save
+this information in the binary, and the next time we link, if nothing else has
+changed, we use the link info stored in the existing binary to decide whether
+to re-link or not.
+
+The "link info" string is stored in a ELF section called ".debug-ghc-link-info"
+(see ghcLinkInfoSectionName) with the SHT_NOTE type. For some time, it used to
+not follow the specified record-based format (see #11022).
+
+-}
+
+{-
+Note [-Xlinker -rpath vs -Wl,-rpath]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+-Wl takes a comma-separated list of options which in the case of
+-Wl,-rpath -Wl,some,path,with,commas parses the path with commas
+as separate options.
+Buck, the build system, produces paths with commas in them.
+
+-Xlinker doesn't have this disadvantage and as far as I can tell
+it is supported by both gcc and clang. Anecdotally nvcc supports
+-Xlinker, but not -Wl.
+-}
+
=====================================
compiler/GHC/Linker/ExtraObj.hs deleted
=====================================
@@ -1,257 +0,0 @@
------------------------------------------------------------------------------
---
--- GHC Extra object linking code
---
--- (c) The GHC Team 2017
---
------------------------------------------------------------------------------
-
-module GHC.Linker.ExtraObj
- ( mkExtraObj
- , mkExtraObjToLinkIntoBinary
- , mkNoteObjsToLinkIntoBinary
- , checkLinkInfo
- , getLinkInfo
- , ghcLinkInfoSectionName
- , ghcLinkInfoNoteName
- , platformSupportsSavingLinkOpts
- , haveRtsOptsFlags
- )
-where
-
-import GHC.Prelude
-import GHC.Platform
-
-import GHC.Unit
-import GHC.Unit.Env
-
-import GHC.Utils.Asm
-import GHC.Utils.Error
-import GHC.Utils.Misc
-import GHC.Utils.Outputable as Outputable
-import GHC.Utils.Logger
-import GHC.Utils.TmpFs
-
-import GHC.Driver.Session
-import GHC.Driver.Ppr
-
-import qualified GHC.Data.ShortText as ST
-
-import GHC.SysTools.Elf
-import GHC.SysTools.Tasks
-import GHC.Linker.Unit
-
-import Control.Monad
-import Data.Maybe
-
-mkExtraObj :: Logger -> TmpFs -> DynFlags -> UnitState -> Suffix -> String -> IO FilePath
-mkExtraObj logger tmpfs dflags unit_state extn xs
- = do cFile <- newTempName logger tmpfs (tmpDir dflags) TFL_CurrentModule extn
- oFile <- newTempName logger tmpfs (tmpDir dflags) TFL_GhcSession "o"
- writeFile cFile xs
- runCc Nothing logger tmpfs dflags
- ([Option "-c",
- FileOption "" cFile,
- Option "-o",
- FileOption "" oFile]
- ++ if extn /= "s"
- then cOpts
- else [])
- return oFile
- where
- -- Pass a different set of options to the C compiler depending one whether
- -- we're compiling C or assembler. When compiling C, we pass the usual
- -- set of include directories and PIC flags.
- cOpts = map Option (picCCOpts dflags)
- ++ map (FileOption "-I" . ST.unpack)
- (unitIncludeDirs $ unsafeLookupUnit unit_state rtsUnit)
-
--- When linking a binary, we need to create a C main() function that
--- starts everything off. This used to be compiled statically as part
--- of the RTS, but that made it hard to change the -rtsopts setting,
--- so now we generate and compile a main() stub as part of every
--- binary and pass the -rtsopts setting directly to the RTS (#5373)
---
--- On Windows, when making a shared library we also may need a DllMain.
---
-mkExtraObjToLinkIntoBinary :: Logger -> TmpFs -> DynFlags -> UnitState -> IO (Maybe FilePath)
-mkExtraObjToLinkIntoBinary logger tmpfs dflags unit_state = do
- when (gopt Opt_NoHsMain dflags && haveRtsOptsFlags dflags) $
- logInfo logger $ withPprStyle defaultUserStyle
- (text "Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main." $$
- text " Call hs_init_ghc() from your main() function to set these options.")
-
- case ghcLink dflags of
- -- Don't try to build the extra object if it is not needed. Compiling the
- -- extra object assumes the presence of the RTS in the unit database
- -- (because the extra object imports Rts.h) but GHC's build system may try
- -- to build some helper programs before building and registering the RTS!
- -- See #18938 for an example where hp2ps failed to build because of a failed
- -- (unsafe) lookup for the RTS in the unit db.
- _ | gopt Opt_NoHsMain dflags
- -> return Nothing
-
- LinkDynLib
- | OSMinGW32 <- platformOS (targetPlatform dflags)
- -> mk_extra_obj dllMain
-
- | otherwise
- -> return Nothing
-
- _ -> mk_extra_obj exeMain
-
- where
- mk_extra_obj = fmap Just . mkExtraObj logger tmpfs dflags unit_state "c" . showSDoc dflags
-
- exeMain = vcat [
- text "#include <Rts.h>",
- text "extern StgClosure ZCMain_main_closure;",
- text "int main(int argc, char *argv[])",
- char '{',
- text " RtsConfig __conf = defaultRtsConfig;",
- text " __conf.rts_opts_enabled = "
- <> text (show (rtsOptsEnabled dflags)) <> semi,
- text " __conf.rts_opts_suggestions = "
- <> (if rtsOptsSuggestions dflags
- then text "true"
- else text "false") <> semi,
- text "__conf.keep_cafs = "
- <> (if gopt Opt_KeepCAFs dflags
- then text "true"
- else text "false") <> semi,
- case rtsOpts dflags of
- Nothing -> Outputable.empty
- Just opts -> text " __conf.rts_opts= " <>
- text (show opts) <> semi,
- text " __conf.rts_hs_main = true;",
- text " return hs_main(argc,argv,&ZCMain_main_closure,__conf);",
- char '}',
- char '\n' -- final newline, to keep gcc happy
- ]
-
- dllMain = vcat [
- text "#include <Rts.h>",
- text "#include <windows.h>",
- text "#include <stdbool.h>",
- char '\n',
- text "bool",
- text "WINAPI",
- text "DllMain ( HINSTANCE hInstance STG_UNUSED",
- text " , DWORD reason STG_UNUSED",
- text " , LPVOID reserved STG_UNUSED",
- text " )",
- text "{",
- text " return true;",
- text "}",
- char '\n' -- final newline, to keep gcc happy
- ]
-
--- Write out the link info section into a new assembly file. Previously
--- this was included as inline assembly in the main.c file but this
--- is pretty fragile. gas gets upset trying to calculate relative offsets
--- that span the .note section (notably .text) when debug info is present
-mkNoteObjsToLinkIntoBinary :: Logger -> TmpFs -> DynFlags -> UnitEnv -> [UnitId] -> IO [FilePath]
-mkNoteObjsToLinkIntoBinary logger tmpfs dflags unit_env dep_packages = do
- link_info <- getLinkInfo dflags unit_env dep_packages
-
- if (platformSupportsSavingLinkOpts (platformOS platform ))
- then fmap (:[]) $ mkExtraObj logger tmpfs dflags unit_state "s" (showSDoc dflags (link_opts link_info))
- else return []
-
- where
- unit_state = ue_homeUnitState unit_env
- platform = ue_platform unit_env
- link_opts info = hcat
- [ -- "link info" section (see Note [LinkInfo section])
- makeElfNote platform ghcLinkInfoSectionName ghcLinkInfoNoteName 0 info
-
- -- ALL generated assembly must have this section to disable
- -- executable stacks. See also
- -- "GHC.CmmToAsm" for another instance
- -- where we need to do this.
- , if platformHasGnuNonexecStack platform
- then text ".section .note.GNU-stack,\"\","
- <> sectionType platform "progbits" <> char '\n'
- else Outputable.empty
- ]
-
--- | Return the "link info" string
---
--- See Note [LinkInfo section]
-getLinkInfo :: DynFlags -> UnitEnv -> [UnitId] -> IO String
-getLinkInfo dflags unit_env dep_packages = do
- package_link_opts <- getUnitLinkOpts (ghcNameVersion dflags) (ways dflags) unit_env dep_packages
- pkg_frameworks <- if not (platformUsesFrameworks (ue_platform unit_env))
- then return []
- else do
- ps <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_packages)
- return (collectFrameworks ps)
- let link_info =
- ( package_link_opts
- , pkg_frameworks
- , rtsOpts dflags
- , rtsOptsEnabled dflags
- , gopt Opt_NoHsMain dflags
- , map showOpt (ldInputs dflags)
- , getOpts dflags opt_l
- )
- return (show link_info)
-
-platformSupportsSavingLinkOpts :: OS -> Bool
-platformSupportsSavingLinkOpts os
- | os == OSSolaris2 = False -- see #5382
- | otherwise = osElfTarget os
-
--- See Note [LinkInfo section]
-ghcLinkInfoSectionName :: String
-ghcLinkInfoSectionName = ".debug-ghc-link-info"
- -- if we use the ".debug" prefix, then strip will strip it by default
-
--- Identifier for the note (see Note [LinkInfo section])
-ghcLinkInfoNoteName :: String
-ghcLinkInfoNoteName = "GHC link info"
-
--- Returns 'False' if it was, and we can avoid linking, because the
--- previous binary was linked with "the same options".
-checkLinkInfo :: Logger -> DynFlags -> UnitEnv -> [UnitId] -> FilePath -> IO Bool
-checkLinkInfo logger dflags unit_env pkg_deps exe_file
- | not (platformSupportsSavingLinkOpts (platformOS (ue_platform unit_env)))
- -- ToDo: Windows and OS X do not use the ELF binary format, so
- -- readelf does not work there. We need to find another way to do
- -- this.
- = return False -- conservatively we should return True, but not
- -- linking in this case was the behaviour for a long
- -- time so we leave it as-is.
- | otherwise
- = do
- link_info <- getLinkInfo dflags unit_env pkg_deps
- debugTraceMsg logger 3 $ text ("Link info: " ++ link_info)
- m_exe_link_info <- readElfNoteAsString logger exe_file
- ghcLinkInfoSectionName ghcLinkInfoNoteName
- let sameLinkInfo = (Just link_info == m_exe_link_info)
- debugTraceMsg logger 3 $ case m_exe_link_info of
- Nothing -> text "Exe link info: Not found"
- Just s
- | sameLinkInfo -> text ("Exe link info is the same")
- | otherwise -> text ("Exe link info is different: " ++ s)
- return (not sameLinkInfo)
-
-{- Note [LinkInfo section]
- ~~~~~~~~~~~~~~~~~~~~~~~
-
-The "link info" is a string representing the parameters of the link. We save
-this information in the binary, and the next time we link, if nothing else has
-changed, we use the link info stored in the existing binary to decide whether
-to re-link or not.
-
-The "link info" string is stored in a ELF section called ".debug-ghc-link-info"
-(see ghcLinkInfoSectionName) with the SHT_NOTE type. For some time, it used to
-not follow the specified record-based format (see #11022).
-
--}
-
-haveRtsOptsFlags :: DynFlags -> Bool
-haveRtsOptsFlags dflags =
- isJust (rtsOpts dflags) || case rtsOptsEnabled dflags of
- RtsOptsSafeOnly -> False
- _ -> True
=====================================
compiler/GHC/Linker/Loader.hs
=====================================
@@ -406,6 +406,7 @@ loadCmdLineLibs'' interp hsc_env pls =
, libraryPaths = lib_paths_base})
= hsc_dflags hsc_env
let logger = hsc_logger hsc_env
+ let ld_config = configureLd dflags
-- (c) Link libraries from the command-line
let minus_ls_1 = [ lib | Option ('-':'l':lib) <- cmdline_ld_inputs ]
@@ -421,7 +422,7 @@ loadCmdLineLibs'' interp hsc_env pls =
OSMinGW32 -> "pthread" : minus_ls_1
_ -> minus_ls_1
-- See Note [Fork/Exec Windows]
- gcc_paths <- getGCCPaths logger dflags os
+ gcc_paths <- getGCCPaths logger platform ld_config
lib_paths_env <- addEnvPaths "LIBRARY_PATH" lib_paths_base
@@ -1254,6 +1255,7 @@ loadPackage interp hsc_env pkgs
= do
let dflags = hsc_dflags hsc_env
let logger = hsc_logger hsc_env
+ ld_config = configureLd dflags
platform = targetPlatform dflags
is_dyn = interpreterDynamic interp
dirs | is_dyn = [map ST.unpack $ Packages.unitLibraryDynDirs pkg | pkg <- pkgs]
@@ -1281,7 +1283,7 @@ loadPackage interp hsc_env pkgs
extra_libs = zipWith (++) extdeplibs linkerlibs
-- See Note [Fork/Exec Windows]
- gcc_paths <- getGCCPaths logger dflags (platformOS platform)
+ gcc_paths <- getGCCPaths logger platform ld_config
dirs_env <- traverse (addEnvPaths "LIBRARY_PATH") dirs
hs_classifieds
@@ -1507,6 +1509,7 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
dflags = hsc_dflags hsc_env
logger = hsc_logger hsc_env
diag_opts = initDiagOpts dflags
+ ld_config = configureLd dflags
dirs = lib_dirs ++ gcc_dirs
gcc = False
user = True
@@ -1570,7 +1573,7 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
findSysDll = fmap (fmap $ DLL . dropExtension . takeFileName) $
findSystemLibrary interp so_name
#endif
- tryGcc = let search = searchForLibUsingGcc logger dflags
+ tryGcc = let search = searchForLibUsingGcc logger ld_config
#if defined(CAN_LOAD_DLL)
dllpath = liftM (fmap DLLPath)
short = dllpath $ search so_name lib_dirs
@@ -1624,11 +1627,11 @@ locateLib interp hsc_env is_hs lib_dirs gcc_dirs lib0
#endif
os = platformOS platform
-searchForLibUsingGcc :: Logger -> DynFlags -> String -> [FilePath] -> IO (Maybe FilePath)
-searchForLibUsingGcc logger dflags so dirs = do
+searchForLibUsingGcc :: Logger -> LdConfig -> String -> [FilePath] -> IO (Maybe FilePath)
+searchForLibUsingGcc logger ld_config so dirs = do
-- GCC does not seem to extend the library search path (using -L) when using
-- --print-file-name. So instead pass it a new base location.
- str <- askLd logger dflags (map (FileOption "-B") dirs
+ str <- askLd logger ld_config (map (FileOption "-B") dirs
++ [Option "--print-file-name", Option so])
let file = case lines str of
[] -> ""
@@ -1640,10 +1643,10 @@ searchForLibUsingGcc logger dflags so dirs = do
-- | Retrieve the list of search directory GCC and the System use to find
-- libraries and components. See Note [Fork/Exec Windows].
-getGCCPaths :: Logger -> DynFlags -> OS -> IO [FilePath]
-getGCCPaths logger dflags os
- | os == OSMinGW32 || platformArch (targetPlatform dflags) == ArchWasm32 =
- do gcc_dirs <- getGccSearchDirectory logger dflags "libraries"
+getGCCPaths :: Logger -> Platform -> LdConfig -> IO [FilePath]
+getGCCPaths logger platform ld_config
+ | platformOS platform == OSMinGW32 || platformArch platform == ArchWasm32 =
+ do gcc_dirs <- getGccSearchDirectory logger ld_config "libraries"
sys_dirs <- getSystemDirectories
return $ nub $ gcc_dirs ++ sys_dirs
| otherwise = return []
@@ -1663,8 +1666,8 @@ gccSearchDirCache = unsafePerformIO $ newIORef []
-- which hopefully is written in an optimized manner to take advantage of
-- caching. At the very least we remove the overhead of the fork/exec and waits
-- which dominate a large percentage of startup time on Windows.
-getGccSearchDirectory :: Logger -> DynFlags -> String -> IO [FilePath]
-getGccSearchDirectory logger dflags key = do
+getGccSearchDirectory :: Logger -> LdConfig -> String -> IO [FilePath]
+getGccSearchDirectory logger ld_config key = do
#if defined(wasm32_HOST_ARCH)
pure []
#else
@@ -1672,7 +1675,7 @@ getGccSearchDirectory logger dflags key = do
case lookup key cache of
Just x -> return x
Nothing -> do
- str <- askLd logger dflags [Option "--print-search-dirs"]
+ str <- askLd logger ld_config [Option "--print-search-dirs"]
let line = dropWhile isSpace str
name = key ++ ": ="
if null line
=====================================
compiler/GHC/Linker/MacOS.hs
=====================================
@@ -17,7 +17,6 @@ import GHC.Unit.Types
import GHC.Unit.State
import GHC.Unit.Env
-import GHC.Settings
import GHC.SysTools.Tasks
import GHC.Runtime.Interpreter
@@ -49,13 +48,13 @@ import Text.ParserCombinators.ReadP as Parser
-- dynamic library through @-add_rpath@.
--
-- See Note [Dynamic linking on macOS]
-runInjectRPaths :: Logger -> ToolSettings -> [FilePath] -> FilePath -> IO ()
-runInjectRPaths logger toolSettings lib_paths dylib = do
- info <- lines <$> askOtool logger toolSettings Nothing [Option "-L", Option dylib]
+runInjectRPaths :: Logger -> OtoolConfig -> InstallNameConfig -> [FilePath] -> FilePath -> IO ()
+runInjectRPaths logger otool_opts install_name_opts lib_paths dylib = do
+ info <- lines <$> askOtool logger otool_opts Nothing [Option "-L", Option dylib]
-- filter the output for only the libraries. And then drop the @rpath prefix.
let libs = fmap (drop 7) $ filter (isPrefixOf "@rpath") $ fmap (head.words) $ info
-- find any pre-existing LC_PATH items
- info <- lines <$> askOtool logger toolSettings Nothing [Option "-l", Option dylib]
+ info <- lines <$> askOtool logger otool_opts Nothing [Option "-l", Option dylib]
let paths = mapMaybe get_rpath info
lib_paths' = [ p | p <- lib_paths, not (p `elem` paths) ]
-- only find those rpaths, that aren't already in the library.
@@ -63,7 +62,7 @@ runInjectRPaths logger toolSettings lib_paths dylib = do
-- inject the rpaths
case rpaths of
[] -> return ()
- _ -> runInstallNameTool logger toolSettings $ map Option $ "-add_rpath":(intersperse "-add_rpath" rpaths) ++ [dylib]
+ _ -> runInstallNameTool logger install_name_opts $ map Option $ "-add_rpath":(intersperse "-add_rpath" rpaths) ++ [dylib]
get_rpath :: String -> Maybe FilePath
get_rpath l = case readP_to_S rpath_parser l of
=====================================
compiler/GHC/Linker/Static.hs
=====================================
@@ -1,12 +1,10 @@
module GHC.Linker.Static
- ( linkBinary
- , linkStaticLib
+ ( linkStaticLib
)
where
import GHC.Prelude
import GHC.Platform
-import GHC.Platform.Ways
import GHC.Settings
import GHC.SysTools
@@ -19,24 +17,15 @@ import GHC.Unit.State
import GHC.Utils.Logger
import GHC.Utils.Monad
-import GHC.Utils.Misc
-import GHC.Utils.TmpFs
-import GHC.Linker.MacOS
import GHC.Linker.Unit
-import GHC.Linker.Dynamic
-import GHC.Linker.ExtraObj
-import GHC.Linker.External
-import GHC.Linker.Windows
import GHC.Linker.Static.Utils
-import GHC.Driver.Config.Linker
import GHC.Driver.Session
import System.FilePath
import System.Directory
import Control.Monad
-import Data.Maybe
-----------------------------------------------------------------------------
-- Static linking, of .o files
@@ -51,225 +40,6 @@ import Data.Maybe
-- read any interface files), so the user must explicitly specify all
-- the packages.
-{-
-Note [-Xlinker -rpath vs -Wl,-rpath]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
--Wl takes a comma-separated list of options which in the case of
--Wl,-rpath -Wl,some,path,with,commas parses the path with commas
-as separate options.
-Buck, the build system, produces paths with commas in them.
-
--Xlinker doesn't have this disadvantage and as far as I can tell
-it is supported by both gcc and clang. Anecdotally nvcc supports
--Xlinker, but not -Wl.
--}
-
-linkBinary :: Logger -> TmpFs -> DynFlags -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
-linkBinary = linkBinary' False
-
-linkBinary' :: Bool -> Logger -> TmpFs -> DynFlags -> UnitEnv -> [FilePath] -> [UnitId] -> IO ()
-linkBinary' staticLink logger tmpfs dflags unit_env o_files dep_units = do
- let platform = ue_platform unit_env
- unit_state = ue_homeUnitState unit_env
- toolSettings' = toolSettings dflags
- verbFlags = getVerbFlags dflags
- arch_os = platformArchOS platform
- output_fn = exeFileName arch_os staticLink (outputFile_ dflags)
- namever = ghcNameVersion dflags
- -- For the wasm target, when ghc is invoked with -dynamic,
- -- when linking the final .wasm binary we must still ensure
- -- the static archives are selected. Otherwise wasm-ld would
- -- fail to find and link the .so library dependencies. wasm-ld
- -- can link PIC objects into static .wasm binaries fine, so we
- -- only adjust the ways in the final linking step, and only
- -- when linking .wasm binary (which is supposed to be fully
- -- static), not when linking .so shared libraries.
- ways_
- | ArchWasm32 <- platformArch platform = removeWay WayDyn $ targetWays_ dflags
- | otherwise = ways dflags
-
- full_output_fn <- if isAbsolute output_fn
- then return output_fn
- else do d <- getCurrentDirectory
- return $ normalise (d </> output_fn)
-
- -- get the full list of packages to link with, by combining the
- -- explicit packages with the auto packages and all of their
- -- dependencies, and eliminating duplicates.
- pkgs <- mayThrowUnitErr (preloadUnitsInfo' unit_env dep_units)
- let pkg_lib_paths = collectLibraryDirs ways_ pkgs
- let pkg_lib_path_opts = concatMap get_pkg_lib_path_opts pkg_lib_paths
- get_pkg_lib_path_opts l
- | osElfTarget (platformOS platform) &&
- dynLibLoader dflags == SystemDependent &&
- ways_ `hasWay` WayDyn
- = let libpath = if gopt Opt_RelativeDynlibPaths dflags
- then "$ORIGIN" </>
- (l `makeRelativeTo` full_output_fn)
- else l
- -- See Note [-Xlinker -rpath vs -Wl,-rpath]
- rpath = if useXLinkerRPath dflags (platformOS platform)
- then ["-Xlinker", "-rpath", "-Xlinker", libpath]
- else []
- -- Solaris 11's linker does not support -rpath-link option. It silently
- -- ignores it and then complains about next option which is -l<some
- -- dir> as being a directory and not expected object file, E.g
- -- ld: elf error: file
- -- /tmp/ghc-src/libraries/base/dist-install/build:
- -- elf_begin: I/O error: region read: Is a directory
- rpathlink = if (platformOS platform) == OSSolaris2
- then []
- else ["-Xlinker", "-rpath-link", "-Xlinker", l]
- in ["-L" ++ l] ++ rpathlink ++ rpath
- | osMachOTarget (platformOS platform) &&
- dynLibLoader dflags == SystemDependent &&
- ways_ `hasWay` WayDyn &&
- useXLinkerRPath dflags (platformOS platform)
- = let libpath = if gopt Opt_RelativeDynlibPaths dflags
- then "@loader_path" </>
- (l `makeRelativeTo` full_output_fn)
- else l
- in ["-L" ++ l] ++ ["-Xlinker", "-rpath", "-Xlinker", libpath]
- | otherwise = ["-L" ++ l]
-
- pkg_lib_path_opts <-
- if gopt Opt_SingleLibFolder dflags
- then do
- libs <- getLibs namever ways_ unit_env dep_units
- tmpDir <- newTempSubDir logger tmpfs (tmpDir dflags)
- sequence_ [ copyFile lib (tmpDir </> basename)
- | (lib, basename) <- libs]
- return [ "-L" ++ tmpDir ]
- else pure pkg_lib_path_opts
-
- let
- dead_strip
- | gopt Opt_WholeArchiveHsLibs dflags = []
- | otherwise = if osSubsectionsViaSymbols (platformOS platform)
- then ["-Wl,-dead_strip"]
- else []
- let lib_paths = libraryPaths dflags
- let lib_path_opts = map ("-L"++) lib_paths
-
- extraLinkObj <- maybeToList <$> mkExtraObjToLinkIntoBinary logger tmpfs dflags unit_state
- noteLinkObjs <- mkNoteObjsToLinkIntoBinary logger tmpfs dflags unit_env dep_units
-
- let
- (pre_hs_libs, post_hs_libs)
- | gopt Opt_WholeArchiveHsLibs dflags
- = if platformOS platform == OSDarwin
- then (["-Wl,-all_load"], [])
- -- OS X does not have a flag to turn off -all_load
- else (["-Wl,--whole-archive"], ["-Wl,--no-whole-archive"])
- | otherwise
- = ([],[])
-
- pkg_link_opts <- do
- unit_link_opts <- getUnitLinkOpts namever ways_ unit_env dep_units
- return $ otherFlags unit_link_opts ++ dead_strip
- ++ pre_hs_libs ++ hsLibs unit_link_opts ++ post_hs_libs
- ++ extraLibs unit_link_opts
- -- -Wl,-u,<sym> contained in other_flags
- -- needs to be put before -l<package>,
- -- otherwise Solaris linker fails linking
- -- a binary with unresolved symbols in RTS
- -- which are defined in base package
- -- the reason for this is a note in ld(1) about
- -- '-u' option: "The placement of this option
- -- on the command line is significant.
- -- This option must be placed before the library
- -- that defines the symbol."
-
- -- frameworks
- pkg_framework_opts <- getUnitFrameworkOpts unit_env dep_units
- let framework_opts = getFrameworkOpts (initFrameworkOpts dflags) platform
-
- -- probably _stub.o files
- let extra_ld_inputs = ldInputs dflags
-
- rc_objs <- case platformOS platform of
- OSMinGW32 | gopt Opt_GenManifest dflags -> maybeCreateManifest logger tmpfs dflags output_fn
- _ -> return []
-
- let linker_config = initLinkerConfig dflags
- let link dflags args = do
- runLink logger tmpfs linker_config args
- -- Make sure to honour -fno-use-rpaths if set on darwin as well; see #20004
- when (platformOS platform == OSDarwin && gopt Opt_RPath dflags) $
- GHC.Linker.MacOS.runInjectRPaths logger (toolSettings dflags) pkg_lib_paths output_fn
-
- link dflags (
- map GHC.SysTools.Option verbFlags
- ++ [ GHC.SysTools.Option "-o"
- , GHC.SysTools.FileOption "" output_fn
- ]
- ++ libmLinkOpts platform
- ++ map GHC.SysTools.Option (
- []
-
- -- See Note [No PIE when linking]
- ++ pieCCLDOpts dflags
-
- -- Permit the linker to auto link _symbol to _imp_symbol.
- -- This lets us link against DLLs without needing an "import library".
- ++ (if platformOS platform == OSMinGW32
- then ["-Wl,--enable-auto-import"]
- else [])
-
- -- '-no_compact_unwind'
- -- C++/Objective-C exceptions cannot use optimised
- -- stack unwinding code. The optimised form is the
- -- default in Xcode 4 on at least x86_64, and
- -- without this flag we're also seeing warnings
- -- like
- -- ld: warning: could not create compact unwind for .LFB3: non-standard register 5 being saved in prolog
- -- on x86.
- ++ (if not (gopt Opt_CompactUnwind dflags) &&
- toolSettings_ldSupportsCompactUnwind toolSettings' &&
- (platformOS platform == OSDarwin) &&
- case platformArch platform of
- ArchX86_64 -> True
- ArchAArch64 -> True
- _ -> False
- then ["-Wl,-no_compact_unwind"]
- else [])
-
- -- We should rather be asking does it support --gc-sections?
- ++ (if toolSettings_ldIsGnuLd toolSettings' &&
- not (gopt Opt_WholeArchiveHsLibs dflags)
- then ["-Wl,--gc-sections"]
- else [])
-
- ++ o_files
- ++ lib_path_opts)
- ++ extra_ld_inputs
- ++ map GHC.SysTools.Option (
- rc_objs
- ++ framework_opts
- ++ pkg_lib_path_opts
- ++ extraLinkObj
- ++ noteLinkObjs
- -- See Note [RTS/ghc-internal interface]
- -- (-u<sym> must come before -lghc-internal...!)
- ++ (if ghcInternalUnitId `elem` map unitId pkgs
- then [concat [ "-Wl,-u,"
- , ['_' | platformLeadingUnderscore platform]
- , "init_ghc_hs_iface" ]]
- else [])
- ++ pkg_link_opts
- ++ pkg_framework_opts
- ++ (if platformOS platform == OSDarwin
- -- dead_strip_dylibs, will remove unused dylibs, and thus save
- -- space in the load commands. The -headerpad is necessary so
- -- that we can inject more @rpath's later for the left over
- -- libraries during runInjectRpaths phase.
- --
- -- See Note [Dynamic linking on macOS].
- then [ "-Wl,-dead_strip_dylibs", "-Wl,-headerpad,8000" ]
- else [])
- ))
-
-- | Linking a static lib will not really link anything. It will merely produce
-- a static archive of all dependent static libraries. The resulting library
-- will still need to be linked with any remaining link flags.
@@ -309,4 +79,5 @@ linkStaticLib logger dflags unit_env o_files dep_units = do
else writeBSDAr output_fn $ afilter (not . isBSDSymdef) ar
-- run ranlib over the archive. write*Ar does *not* create the symbol index.
- runRanlib logger dflags [GHC.SysTools.FileOption "" output_fn]
+ let ranlib_opts = configureRanlib dflags
+ runRanlib logger ranlib_opts [GHC.SysTools.FileOption "" output_fn]
=====================================
compiler/GHC/Linker/Windows.hs
=====================================
@@ -1,5 +1,7 @@
module GHC.Linker.Windows
- ( maybeCreateManifest
+ ( ManifestOpts (..)
+ , initManifestOpts
+ , maybeCreateManifest
)
where
@@ -12,13 +14,28 @@ import GHC.Utils.Logger
import System.FilePath
import System.Directory
+data ManifestOpts = ManifestOpts
+ { manifestEmbed :: !Bool -- ^ Should the manifest be embedded in the binary with Windres
+ , manifestTempdir :: TempDir
+ , manifestWindresConfig :: WindresConfig
+ , manifestObjectSuf :: String
+ }
+
+initManifestOpts :: DynFlags -> ManifestOpts
+initManifestOpts dflags = ManifestOpts
+ { manifestEmbed = gopt Opt_EmbedManifest dflags
+ , manifestTempdir = tmpDir dflags
+ , manifestWindresConfig = configureWindres dflags
+ , manifestObjectSuf = objectSuf dflags
+ }
+
maybeCreateManifest
:: Logger
-> TmpFs
- -> DynFlags
+ -> ManifestOpts
-> FilePath -- ^ filename of executable
-> IO [FilePath] -- ^ extra objects to embed, maybe
-maybeCreateManifest logger tmpfs dflags exe_filename = do
+maybeCreateManifest logger tmpfs opts exe_filename = do
let manifest_filename = exe_filename <.> "manifest"
manifest =
"<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n\
@@ -42,18 +59,18 @@ maybeCreateManifest logger tmpfs dflags exe_filename = do
-- foo.exe.manifest. However, for extra robustness, and so that
-- we can move the binary around, we can embed the manifest in
-- the binary itself using windres:
- if not (gopt Opt_EmbedManifest dflags)
+ if not (manifestEmbed opts)
then return []
else do
- rc_filename <- newTempName logger tmpfs (tmpDir dflags) TFL_CurrentModule "rc"
+ rc_filename <- newTempName logger tmpfs (manifestTempdir opts) TFL_CurrentModule "rc"
rc_obj_filename <-
- newTempName logger tmpfs (tmpDir dflags) TFL_GhcSession (objectSuf dflags)
+ newTempName logger tmpfs (manifestTempdir opts) TFL_GhcSession (manifestObjectSuf opts)
writeFile rc_filename $
"1 24 MOVEABLE PURE \"" ++ manifest_filename ++ "\"\n"
-- magic numbers :-)
- runWindres logger dflags $ map GHC.SysTools.Option $
+ runWindres logger (manifestWindresConfig opts) $ map GHC.SysTools.Option $
["--input="++rc_filename,
"--output="++rc_obj_filename,
"--output-format=coff"]
=====================================
compiler/GHC/Runtime/Interpreter/C.hs
=====================================
@@ -0,0 +1,85 @@
+{-# LANGUAGE MultiWayIf #-}
+
+-- | External interpreter program
+module GHC.Runtime.Interpreter.C
+ ( generateIservC
+ )
+where
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Data.FastString
+import GHC.Utils.Logger
+import GHC.Utils.TmpFs
+import GHC.Unit.Types
+import GHC.Unit.Env
+import GHC.Unit.Info
+import GHC.Unit.State
+import GHC.Utils.Panic.Plain
+import GHC.Linker.Executable
+import GHC.Linker.Config
+import GHC.Utils.CliOption
+
+-- | Generate iserv program for the target
+generateIservC :: Logger -> TmpFs -> ExecutableLinkOpts -> UnitEnv -> IO FilePath
+generateIservC logger tmpfs opts unit_env = do
+ -- get the unit-id of the ghci package. We need this to load the
+ -- interpreter code.
+ let unit_state = ue_homeUnitState unit_env
+ ghci_unit_id <- case lookupPackageName unit_state (PackageName (fsLit "ghci")) of
+ Nothing -> cmdLineErrorIO "C interpreter: couldn't find \"ghci\" package"
+ Just i -> pure i
+
+ -- generate a temporary name for the iserv program
+ let tmpdir = leTempDir opts
+ exe_file <- newTempName logger tmpfs tmpdir TFL_GhcSession "iserv"
+
+ let platform = ue_platform unit_env
+ let os = platformOS platform
+
+ -- we inherit ExecutableLinkOpts for the target code (i.e. derived from
+ -- DynFlags specified by the user and from settings). We need to adjust these
+ -- options to generate the iserv program we want. Some settings are to be
+ -- shared (e.g. ways, platform, etc.) but some other must be set specifically
+ -- for iserv.
+ let opts' = opts
+ { -- write iserv program in some temporary directory
+ leOutputFile = Just exe_file
+
+ -- we need GHC to generate a main entry point...
+ , leNoHsMain = False
+
+ -- ...however the main symbol must be the iserv server
+ , leMainSymbol = zString (zEncodeFS (unitIdFS ghci_unit_id)) ++ "_GHCiziServer_defaultServer"
+
+ -- we need to reset inputs, otherwise one of them may be defining
+ -- `main` too (with -no-hs-main).
+ , leInputs = []
+
+ -- we never know what symbols GHC will look up in the future, so we
+ -- must retain CAFs for running interpreted code.
+ , leKeepCafs = True
+
+ -- enable all rts options
+ , leRtsOptsEnabled = RtsOptsAll
+
+ -- Add -Wl,--export-dynamic enables GHCi to load dynamic objects that
+ -- refer to the RTS. This is harmless if you don't use it (adds a bit
+ -- of overhead to startup and increases the binary sizes) but if you
+ -- need it there's no alternative.
+ --
+ -- The Solaris linker does not support --export-dynamic option. It also
+ -- does not need it since it exports all dynamic symbols by default
+ , leLinkerConfig = if
+ | osElfTarget os
+ , os /= OSFreeBSD
+ , os /= OSSolaris2
+ -> (leLinkerConfig opts)
+ { linkerOptionsPost = linkerOptionsPost (leLinkerConfig opts) ++ [Option "-Wl,--export-dynamic"]
+ }
+ | otherwise
+ -> leLinkerConfig opts
+ }
+ linkExecutable logger tmpfs opts' unit_env [] [ghci_unit_id]
+
+ pure exe_file
=====================================
compiler/GHC/Runtime/Interpreter/Init.hs
=====================================
@@ -0,0 +1,162 @@
+{-# LANGUAGE CPP #-}
+{-# LANGUAGE MultiWayIf #-}
+
+module GHC.Runtime.Interpreter.Init
+ ( initInterpreter
+ , InterpOpts (..)
+ )
+where
+
+
+import GHC.Prelude
+import GHC.Platform
+import GHC.Platform.Ways
+import GHC.Settings
+import GHC.Unit.Finder
+import GHC.Unit.Env
+import GHC.Utils.TmpFs
+import GHC.SysTools.Tasks
+
+import GHC.Linker.Executable
+import qualified GHC.Linker.Loader as Loader
+import GHC.Runtime.Interpreter
+import GHC.Runtime.Interpreter.C
+import GHC.StgToJS.Types (StgToJSConfig)
+
+import GHC.Utils.Monad
+import GHC.Utils.Outputable
+import GHC.Utils.Logger
+import GHC.Utils.Error
+import Control.Concurrent
+import System.Process
+
+data InterpOpts = InterpOpts
+ { interpExternal :: !Bool
+ , interpProg :: String
+ , interpOpts :: [String]
+ , interpWays :: Ways
+ , interpNameVer :: GhcNameVersion
+ , interpLdConfig :: LdConfig
+ , interpCcConfig :: CcConfig
+ , interpJsInterp :: FilePath
+ , interpTmpDir :: TempDir
+ , interpFinderOpts :: FinderOpts
+ , interpJsCodegenCfg :: StgToJSConfig
+ , interpVerbosity :: Int
+ , interpCreateProcess :: Maybe (CreateProcess -> IO ProcessHandle) -- create iserv process hook
+ , interpWasmDyld :: FilePath
+ , interpBrowser :: Bool
+ , interpBrowserHost :: String
+ , interpBrowserPort :: Int
+ , interpBrowserRedirectWasiConsole :: Bool
+ , interpBrowserPuppeteerLaunchOpts :: Maybe String
+ , interpBrowserPlaywrightBrowserType :: Maybe String
+ , interpBrowserPlaywrightLaunchOpts :: Maybe String
+ , interpExecutableLinkOpts :: ExecutableLinkOpts
+ }
+
+-- | Initialize code interpreter
+initInterpreter
+ :: TmpFs
+ -> Logger
+ -> Platform
+ -> FinderCache
+ -> UnitEnv
+ -> InterpOpts
+ -> IO (Maybe Interp)
+initInterpreter tmpfs logger platform finder_cache unit_env opts = do
+
+ lookup_cache <- liftIO $ mkInterpSymbolCache
+
+ -- see Note [Target code interpreter]
+ if
+#if !defined(wasm32_HOST_ARCH)
+ -- Wasm dynamic linker
+ | ArchWasm32 <- platformArch platform
+ -> do
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ libdir <- liftIO $ last <$> Loader.getGccSearchDirectory logger (interpLdConfig opts) "libraries"
+ let profiled = interpWays opts `hasWay` WayProf
+ way_tag = if profiled then "_p" else ""
+ let cfg =
+ WasmInterpConfig
+ { wasmInterpDyLD = interpWasmDyld opts
+ , wasmInterpLibDir = libdir
+ , wasmInterpOpts = interpOpts opts
+ , wasmInterpBrowser = interpBrowser opts
+ , wasmInterpBrowserHost = interpBrowserHost opts
+ , wasmInterpBrowserPort = interpBrowserPort opts
+ , wasmInterpBrowserRedirectWasiConsole = interpBrowserRedirectWasiConsole opts
+ , wasmInterpBrowserPuppeteerLaunchOpts = interpBrowserPuppeteerLaunchOpts opts
+ , wasmInterpBrowserPlaywrightBrowserType = interpBrowserPlaywrightBrowserType opts
+ , wasmInterpBrowserPlaywrightLaunchOpts = interpBrowserPlaywrightLaunchOpts opts
+ , wasmInterpTargetPlatform = platform
+ , wasmInterpProfiled = profiled
+ , wasmInterpHsSoSuffix = way_tag ++ dynLibSuffix (interpNameVer opts)
+ , wasmInterpUnitState = ue_homeUnitState unit_env
+ }
+ pure $ Just $ Interp (ExternalInterp $ ExtWasm $ ExtInterpState cfg s) loader lookup_cache
+#endif
+
+ -- JavaScript interpreter
+ | ArchJavaScript <- platformArch platform
+ -> do
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ let cfg = JSInterpConfig
+ { jsInterpNodeConfig = defaultNodeJsSettings
+ , jsInterpScript = interpJsInterp opts
+ , jsInterpTmpFs = tmpfs
+ , jsInterpTmpDir = interpTmpDir opts
+ , jsInterpLogger = logger
+ , jsInterpCodegenCfg = interpJsCodegenCfg opts
+ , jsInterpUnitEnv = unit_env
+ , jsInterpFinderOpts = interpFinderOpts opts
+ , jsInterpFinderCache = finder_cache
+ }
+ return (Just (Interp (ExternalInterp (ExtJS (ExtInterpState cfg s))) loader lookup_cache))
+
+ -- external interpreter
+ | interpExternal opts
+ -> do
+ let
+ profiled = interpWays opts `hasWay` WayProf
+ dynamic = interpWays opts `hasWay` WayDyn
+ prog <- case interpProg opts of
+ -- build iserv program if none specified
+ "" -> generateIservC logger tmpfs (interpExecutableLinkOpts opts) unit_env
+ _ -> pure (interpProg opts ++ flavour)
+ where
+ flavour
+ | profiled && dynamic = "-prof-dyn"
+ | profiled = "-prof"
+ | dynamic = "-dyn"
+ | otherwise = ""
+ let msg = text "Starting " <> text prog
+ tr <- if interpVerbosity opts >= 3
+ then return (logInfo logger $ withPprStyle defaultDumpStyle msg)
+ else return (pure ())
+ let
+ conf = IServConfig
+ { iservConfProgram = prog
+ , iservConfOpts = interpOpts opts
+ , iservConfProfiled = profiled
+ , iservConfDynamic = dynamic
+ , iservConfHook = interpCreateProcess opts
+ , iservConfTrace = tr
+ }
+ s <- liftIO $ newMVar InterpPending
+ loader <- liftIO Loader.uninitializedLoader
+ return (Just (Interp (ExternalInterp (ExtIServ (ExtInterpState conf s))) loader lookup_cache))
+
+ -- Internal interpreter
+ | otherwise
+ ->
+#if defined(HAVE_INTERNAL_INTERPRETER)
+ do
+ loader <- liftIO Loader.uninitializedLoader
+ return (Just (Interp InternalInterp loader lookup_cache))
+#else
+ return Nothing
+#endif
=====================================
compiler/GHC/SysTools/Tasks.hs
=====================================
@@ -13,7 +13,11 @@ module GHC.SysTools.Tasks
, runSourceCodePreprocessor
, runPp
, runCc
+ , configureCc
+ , CcConfig (..)
+ , configureLd
, askLd
+ , LdConfig(..)
, runAs
, runLlvmOpt
, runLlvmLlc
@@ -22,10 +26,20 @@ module GHC.SysTools.Tasks
, figureLlvmVersion
, runMergeObjects
, runAr
+ , ArConfig (..)
+ , configureAr
, askOtool
+ , configureOtool
+ , OtoolConfig (..)
, runInstallNameTool
+ , InstallNameConfig (..)
+ , configureInstallName
, runRanlib
+ , RanlibConfig (..)
+ , configureRanlib
, runWindres
+ , WindresConfig (..)
+ , configureWindres
) where
import GHC.Prelude
@@ -207,15 +221,32 @@ runPp logger dflags args = traceSystoolCommand logger "pp" $ do
opts = map Option (getOpts dflags opt_F)
runSomething logger "Haskell pre-processor" prog (args ++ opts)
+data CcConfig = CcConfig
+ { ccProg :: String
+ , cxxProg :: String
+ , ccOpts :: [String]
+ , cxxOpts :: [String]
+ , ccPicOpts :: [String]
+ }
+
+configureCc :: DynFlags -> CcConfig
+configureCc dflags = CcConfig
+ { ccProg = pgm_c dflags
+ , cxxProg = pgm_cxx dflags
+ , ccOpts = getOpts dflags opt_c
+ , cxxOpts = getOpts dflags opt_cxx
+ , ccPicOpts = picCCOpts dflags
+ }
+
-- | Run compiler of C-like languages and raw objects (such as gcc or clang).
-runCc :: Maybe ForeignSrcLang -> Logger -> TmpFs -> DynFlags -> [Option] -> IO ()
-runCc mLanguage logger tmpfs dflags args = traceSystoolCommand logger "cc" $ do
+runCc :: Maybe ForeignSrcLang -> Logger -> TmpFs -> TempDir -> CcConfig -> [Option] -> IO ()
+runCc mLanguage logger tmpfs tmpdir opts args = traceSystoolCommand logger "cc" $ do
let args1 = map Option userOpts
args2 = languageOptions ++ args ++ args1
-- We take care to pass -optc flags in args1 last to ensure that the
-- user can override flags passed by GHC. See #14452.
mb_env <- getGccEnv args2
- runSomethingResponseFile logger tmpfs (tmpDir dflags) cc_filter dbgstring prog args2
+ runSomethingResponseFile logger tmpfs tmpdir cc_filter dbgstring prog args2
mb_env
where
-- force the C compiler to interpret this file as C when
@@ -223,38 +254,49 @@ runCc mLanguage logger tmpfs dflags args = traceSystoolCommand logger "cc" $ do
-- Also useful for plain .c files, just in case GHC saw a
-- -x c option.
(languageOptions, userOpts, prog, dbgstring) = case mLanguage of
- Nothing -> ([], userOpts_c, pgm_c dflags, "C Compiler")
- Just language -> ([Option "-x", Option languageName], opts, prog, dbgstr)
+ Nothing -> ([], ccOpts opts, ccProg opts, "C Compiler")
+ Just language -> ([Option "-x", Option languageName], copts, prog, dbgstr)
where
- (languageName, opts, prog, dbgstr) = case language of
- LangC -> ("c", userOpts_c
- ,pgm_c dflags, "C Compiler")
- LangCxx -> ("c++", userOpts_cxx
- ,pgm_cxx dflags , "C++ Compiler")
- LangObjc -> ("objective-c", userOpts_c
- ,pgm_c dflags , "Objective C Compiler")
- LangObjcxx -> ("objective-c++", userOpts_cxx
- ,pgm_cxx dflags, "Objective C++ Compiler")
+ (languageName, copts, prog, dbgstr) = case language of
+ LangC -> ("c", ccOpts opts
+ ,ccProg opts, "C Compiler")
+ LangCxx -> ("c++", cxxOpts opts
+ ,cxxProg opts, "C++ Compiler")
+ LangObjc -> ("objective-c", ccOpts opts
+ ,ccProg opts, "Objective C Compiler")
+ LangObjcxx -> ("objective-c++", cxxOpts opts
+ ,cxxProg opts, "Objective C++ Compiler")
LangAsm -> ("assembler", []
- ,pgm_c dflags, "Asm Compiler")
+ ,ccProg opts, "Asm Compiler")
RawObject -> ("c", []
- ,pgm_c dflags, "C Compiler") -- claim C for lack of a better idea
+ ,ccProg opts, "C Compiler") -- claim C for lack of a better idea
--JS backend shouldn't reach here, so we just pass
-- strings to satisfy the totality checker
LangJs -> ("js", []
- ,pgm_c dflags, "JS Backend Compiler")
- userOpts_c = getOpts dflags opt_c
- userOpts_cxx = getOpts dflags opt_cxx
+ ,ccProg opts, "JS Backend Compiler")
isContainedIn :: String -> String -> Bool
xs `isContainedIn` ys = any (xs `isPrefixOf`) (tails ys)
--- | Run the linker with some arguments and return the output
-askLd :: Logger -> DynFlags -> [Option] -> IO String
-askLd logger dflags args = traceSystoolCommand logger "linker" $ do
+data LdConfig = LdConfig
+ { ldProg :: String -- ^ LD program path
+ , ldOpts :: [Option] -- ^ LD program arguments
+ }
+
+configureLd :: DynFlags -> LdConfig
+configureLd dflags =
let (p,args0) = pgm_l dflags
args1 = map Option (getOpts dflags opt_l)
- args2 = args0 ++ args1 ++ args
+ in LdConfig
+ { ldProg = p
+ , ldOpts = args0 ++ args1
+ }
+
+-- | Run the linker with some arguments and return the output
+askLd :: Logger -> LdConfig -> [Option] -> IO String
+askLd logger ld_config args = traceSystoolCommand logger "linker" $ do
+ let p = ldProg ld_config
+ args2 = ldOpts ld_config ++ args
mb_env <- getGccEnv args2
runSomethingWith logger "gcc" p args2 $ \real_args ->
readCreateProcessWithExitCode' (proc p real_args){ env = mb_env }
@@ -373,31 +415,80 @@ runMergeObjects logger tmpfs dflags args =
else do
runSomething logger "Merge objects" p args2
-runAr :: Logger -> DynFlags -> Maybe FilePath -> [Option] -> IO ()
-runAr logger dflags cwd args = traceSystoolCommand logger "ar" $ do
- let ar = pgm_ar dflags
+newtype ArConfig = ArConfig
+ { arProg :: String
+ }
+
+configureAr :: DynFlags -> ArConfig
+configureAr dflags = ArConfig
+ { arProg = pgm_ar dflags
+ }
+
+runAr :: Logger -> ArConfig -> Maybe FilePath -> [Option] -> IO ()
+runAr logger opts cwd args = traceSystoolCommand logger "ar" $ do
+ let ar = arProg opts
runSomethingFiltered logger id "Ar" ar args cwd Nothing
-askOtool :: Logger -> ToolSettings -> Maybe FilePath -> [Option] -> IO String
-askOtool logger toolSettings mb_cwd args = do
- let otool = toolSettings_pgm_otool toolSettings
+newtype OtoolConfig = OtoolConfig
+ { otoolProg :: String
+ }
+
+configureOtool :: DynFlags -> OtoolConfig
+configureOtool dflags = OtoolConfig
+ { otoolProg = toolSettings_pgm_otool (toolSettings dflags)
+ }
+
+askOtool :: Logger -> OtoolConfig -> Maybe FilePath -> [Option] -> IO String
+askOtool logger opts mb_cwd args = do
+ let otool = otoolProg opts
runSomethingWith logger "otool" otool args $ \real_args ->
readCreateProcessWithExitCode' (proc otool real_args){ cwd = mb_cwd }
-runInstallNameTool :: Logger -> ToolSettings -> [Option] -> IO ()
-runInstallNameTool logger toolSettings args = do
- let tool = toolSettings_pgm_install_name_tool toolSettings
+newtype InstallNameConfig = InstallNameConfig
+ { installNameProg :: String
+ }
+
+configureInstallName :: DynFlags -> InstallNameConfig
+configureInstallName dflags = InstallNameConfig
+ { installNameProg = toolSettings_pgm_install_name_tool (toolSettings dflags)
+ }
+
+runInstallNameTool :: Logger -> InstallNameConfig -> [Option] -> IO ()
+runInstallNameTool logger opts args = do
+ let tool = installNameProg opts
runSomethingFiltered logger id "Install Name Tool" tool args Nothing Nothing
-runRanlib :: Logger -> DynFlags -> [Option] -> IO ()
-runRanlib logger dflags args = traceSystoolCommand logger "ranlib" $ do
- let ranlib = pgm_ranlib dflags
+newtype RanlibConfig = RanlibConfig
+ { ranlibProg :: String
+ }
+
+configureRanlib :: DynFlags -> RanlibConfig
+configureRanlib dflags = RanlibConfig
+ { ranlibProg = pgm_ranlib dflags
+ }
+
+runRanlib :: Logger -> RanlibConfig -> [Option] -> IO ()
+runRanlib logger opts args = traceSystoolCommand logger "ranlib" $ do
+ let ranlib = ranlibProg opts
runSomethingFiltered logger id "Ranlib" ranlib args Nothing Nothing
-runWindres :: Logger -> DynFlags -> [Option] -> IO ()
-runWindres logger dflags args = traceSystoolCommand logger "windres" $ do
- let cc_args = map Option (sOpt_c (settings dflags))
- windres = pgm_windres dflags
- opts = map Option (getOpts dflags opt_windres)
+data WindresConfig = WindresConfig
+ { windresProg :: String
+ , windresOpts :: [Option]
+ , windresCOpts :: [Option]
+ }
+
+configureWindres :: DynFlags -> WindresConfig
+configureWindres dflags = WindresConfig
+ { windresProg = pgm_windres dflags
+ , windresOpts = map Option (getOpts dflags opt_windres)
+ , windresCOpts = map Option (sOpt_c (settings dflags))
+ }
+
+runWindres :: Logger -> WindresConfig -> [Option] -> IO ()
+runWindres logger opts args = traceSystoolCommand logger "windres" $ do
+ let cc_args = windresCOpts opts
+ windres = windresProg opts
+ wopts = windresOpts opts
mb_env <- getGccEnv cc_args
- runSomethingFiltered logger id "Windres" windres (opts ++ args) Nothing mb_env
+ runSomethingFiltered logger id "Windres" windres (wopts ++ args) Nothing mb_env
=====================================
compiler/ghc.cabal.in
=====================================
@@ -515,6 +515,7 @@ Library
GHC.Driver.Config.HsToCore
GHC.Driver.Config.HsToCore.Ticks
GHC.Driver.Config.HsToCore.Usage
+ GHC.Driver.Config.Interpreter
GHC.Driver.Config.Linker
GHC.Driver.Config.Logger
GHC.Driver.Config.Parser
@@ -650,7 +651,7 @@ Library
GHC.Linker.Deps
GHC.Linker.Dynamic
GHC.Linker.External
- GHC.Linker.ExtraObj
+ GHC.Linker.Executable
GHC.Linker.Loader
GHC.Linker.MacOS
GHC.Linker.Static
@@ -723,6 +724,8 @@ Library
GHC.Runtime.Heap.Inspect
GHC.Runtime.Heap.Layout
GHC.Runtime.Interpreter
+ GHC.Runtime.Interpreter.C
+ GHC.Runtime.Interpreter.Init
GHC.Runtime.Interpreter.JS
GHC.Runtime.Interpreter.Process
GHC.Runtime.Interpreter.Types
=====================================
testsuite/tests/bytecode/T23973.hs
=====================================
@@ -0,0 +1,17 @@
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE LinearTypes #-}
+
+module Main (main) where
+
+data Ur a where
+ Ur :: a -> Ur a
+
+unur :: Ur a -> a
+unur (Ur a) = a
+
+segvGHCi :: Ur ()
+segvGHCi = Ur $ ()
+
+main :: IO ()
+main = print (unur segvGHCi)
+
=====================================
testsuite/tests/bytecode/T23973.script
=====================================
@@ -0,0 +1,2 @@
+:l T23973.hs
+main
=====================================
testsuite/tests/bytecode/T23973.stdout
=====================================
@@ -0,0 +1 @@
+()
=====================================
testsuite/tests/bytecode/T26565.hs
=====================================
@@ -0,0 +1,6 @@
+{-# LANGUAGE LinearTypes #-}
+module Test where
+
+data Ur a where
+ Ur :: a -> Ur a
+
=====================================
testsuite/tests/bytecode/T26565.script
=====================================
@@ -0,0 +1,3 @@
+:l T26565
+Ur y = (\x -> Ur $ replicate 5 'a') 3
+y
=====================================
testsuite/tests/bytecode/T26565.stdout
=====================================
@@ -0,0 +1 @@
+"aaaaa"
=====================================
testsuite/tests/bytecode/all.T
=====================================
@@ -6,6 +6,8 @@ test('T25975', extra_ways(ghci_ways), compile_and_run,
# Some of the examples work more robustly with these flags
['-fno-break-points -fno-full-laziness'])
+test('T26565', extra_files(["T26565.hs"]), ghci_script, ['T26565.script'])
+test('T23973', extra_files(["T23973.hs"]), ghci_script, ['T23973.script'])
+
# Nullary data constructors
test('T26216', extra_files(["T26216_aux.hs"]), ghci_script, ['T26216.script'])
-
=====================================
testsuite/tests/driver/T24731.hs
=====================================
@@ -0,0 +1,5 @@
+{-# LANGUAGE TemplateHaskell #-}
+module T24731 where
+
+foo :: Int
+foo = $([|10|])
=====================================
testsuite/tests/driver/all.T
=====================================
@@ -333,3 +333,4 @@ test('T25382', normal, makefile_test, [])
test('T26018', req_c, makefile_test, [])
test('T24120', normal, compile, ['-Wunused-packages -hide-all-packages -package base -package system-cxx-std-lib'])
test('T26551', [extra_files(['T26551.hs'])], makefile_test, [])
+test('T24731', [only_ways(['ext-interp'])], compile, ['-fexternal-interpreter -pgmi ""'])
=====================================
testsuite/tests/simd/should_run/all.T
=====================================
@@ -175,6 +175,7 @@ test('T26410_ffi'
, [ only_ways(llvm_ways) # SIMD NCG TODO: support 512-bit wide vectors
, unless(arch('x86_64') and have_cpu_feature('avx512f'), skip)
, extra_hc_opts('-mavx512f -optc -mavx512f -optlc -mcpu=penryn')
+ , when(opsys('mingw32'), fragile(26595))
]
, compile_and_run if have_cpu_feature('avx512f') else compile
, ['T26410_ffi_c.c'])
=====================================
utils/iserv/iserv.cabal.in
=====================================
@@ -30,15 +30,6 @@ Executable iserv
C-Sources: cbits/iservmain.c
Hs-Source-Dirs: src
include-dirs: .
- Build-Depends: array >= 0.5 && < 0.6,
- base >= 4 && < 5,
- binary >= 0.7 && < 0.11,
- bytestring >= 0.10 && < 0.13,
- containers >= 0.5 && < 0.9,
- deepseq >= 1.4 && < 1.6,
- ghci == @ProjectVersionMunged@
-
- if os(windows)
- Cpp-Options: -DWINDOWS
- else
- Build-Depends: unix >= 2.7 && < 2.9
+ Build-Depends:
+ base >= 4 && < 5,
+ ghci == @ProjectVersionMunged@
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/816ee602ade4afa2f79da2e59f6b68…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/816ee602ade4afa2f79da2e59f6b68…
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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 6 commits: Bump windows bootstrap GHC to 9.10.3
by Marge Bot (＠marge-bot) 20 Nov '25
by Marge Bot (＠marge-bot) 20 Nov '25
20 Nov '25
Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC
Commits:
38c3bbe6 by Julian Ospald at 2025-11-20T10:31:24-05:00
Bump windows bootstrap GHC to 9.10.3
- - - - -
df83a727 by Julian Ospald at 2025-11-20T10:31:24-05:00
Use libffi-clib
Previously, we would build libffi via hadrian
and bundle it manually with the GHC bindist.
This now moves all that logic out of hadrian
and allows us to have a clean Haskell package
to build and link against and ship it without
extra logic.
This patch still retains the ability to link
against a system libffi.
The main reason of bundling libffi was that on
some platforms (e.g. FreeBSD and Mac), system libffi
is not visible to the C toolchain by default,
so users would require settings in e.g. cabal
to be able to compile anything.
- - - - -
65999588 by Matthew Pickering at 2025-11-20T10:31:24-05:00
hadrian: Use a response file to invoke GHC for dep gathering.
In some cases we construct an argument list too long for GHC to
handle directly on windows. This happens when we generate
the dependency file because the command line will contain
references to a large number of .hs files.
To avoid this we now invoke GHC using a response file when
generating dependencies to sidestep length limitations.
Note that we only pass the actual file names in the dependency
file. Why? Because this side-steps #26560
- - - - -
a24e0168 by Sylvain Henry at 2025-11-20T10:31:31-05:00
Build external interpreter program on demand (#24731)
This patch teaches GHC how to build the external interpreter program
when it is missing. As long as we have the `ghci` library, doing this is
trivial so most of this patch is refactoring for doing it sanely.
- - - - -
a08cf77b by Rodrigo Mesquita at 2025-11-20T10:31:32-05:00
Add tests for #23973 and #26565
These were fixed by 4af4f0f070f83f948e49ad5d7835fd91b8d3f0e6 in !10417
- - - - -
816ee602 by sheaf at 2025-11-20T10:31:32-05:00
Mark T26410_ffi as fragile on Windows
As seen in #26595, this test intermittently fails on Windows.
This commit marks it as fragile, until we get around to fixing it.
- - - - -
53 changed files:
- .gitlab/generate-ci/gen_ci.hs
- .gitlab/jobs.yaml
- .gitmodules
- compiler/GHC.hs
- + compiler/GHC/Driver/Config/Interpreter.hs
- compiler/GHC/Driver/Config/Linker.hs
- compiler/GHC/Driver/DynFlags.hs
- compiler/GHC/Driver/Pipeline.hs
- compiler/GHC/Driver/Pipeline/Execute.hs
- compiler/GHC/Linker/Config.hs
- compiler/GHC/Linker/Dynamic.hs
- + compiler/GHC/Linker/Executable.hs
- − compiler/GHC/Linker/ExtraObj.hs
- compiler/GHC/Linker/Loader.hs
- compiler/GHC/Linker/MacOS.hs
- compiler/GHC/Linker/Static.hs
- compiler/GHC/Linker/Unit.hs
- compiler/GHC/Linker/Windows.hs
- + compiler/GHC/Runtime/Interpreter/C.hs
- + compiler/GHC/Runtime/Interpreter/Init.hs
- compiler/GHC/SysTools/Tasks.hs
- compiler/GHC/Unit/State.hs
- compiler/ghc.cabal.in
- hadrian/hadrian.cabal
- hadrian/src/Builder.hs
- hadrian/src/Packages.hs
- hadrian/src/Rules.hs
- hadrian/src/Rules/Documentation.hs
- hadrian/src/Rules/Generate.hs
- − hadrian/src/Rules/Libffi.hs
- hadrian/src/Rules/Library.hs
- hadrian/src/Rules/Register.hs
- hadrian/src/Rules/Rts.hs
- hadrian/src/Settings/Builders/Cabal.hs
- hadrian/src/Settings/Builders/Ghc.hs
- hadrian/src/Settings/Default.hs
- hadrian/src/Settings/Packages.hs
- + libraries/libffi-clib
- rts/configure.ac
- rts/include/rts/ghc_ffi.h
- rts/rts.buildinfo.in
- rts/rts.cabal
- + testsuite/tests/bytecode/T23973.hs
- + testsuite/tests/bytecode/T23973.script
- + testsuite/tests/bytecode/T23973.stdout
- + testsuite/tests/bytecode/T26565.hs
- + testsuite/tests/bytecode/T26565.script
- + testsuite/tests/bytecode/T26565.stdout
- testsuite/tests/bytecode/all.T
- + testsuite/tests/driver/T24731.hs
- testsuite/tests/driver/all.T
- testsuite/tests/simd/should_run/all.T
- utils/iserv/iserv.cabal.in
The diff was not included because it is too large.
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c900b91458de0f4065e77103beef59…
--
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/c900b91458de0f4065e77103beef59…
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