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[Git][ghc/ghc] Pushed new branch wip/set-keep-cafs-by-need
by Cheng Shao (＠TerrorJack) 01 Oct '25

01 Oct '25

Cheng Shao pushed new branch wip/set-keep-cafs-by-need at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/set-keep-cafs-by-need You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/gbc-files] 2 commits: Don't get so many uniques
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed to branch wip/gbc-files at Glasgow Haskell Compiler / GHC Commits: 1b95e960 by Matthew Pickering at 2025-10-01T12:28:59+01:00 Don't get so many uniques - - - - - 33dc1d21 by Matthew Pickering at 2025-10-01T14:34:55+01:00 Use 'OsPath' in getModificationTimeIfExists This part of the compiler is quite hot during recompilation checking in particular since the filepaths will be translated to a string. It is better to use the 'OsPath' native function, which turns out to be easy to do. - - - - - 8 changed files: - compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/Driver/Backpack.hs - compiler/GHC/Driver/Downsweep.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Utils/Misc.hs Changes: ===================================== compiler/GHC/ByteCode/Serialize.hs ===================================== @@ -34,6 +34,7 @@ import qualified Data.ByteString as BS import Data.Traversable import GHC.Utils.Logger import GHC.Linker.Types +import System.IO.Unsafe (unsafeInterleaveIO) -- | The on-disk representation of a bytecode object data OnDiskByteCodeObject = OnDiskByteCodeObject { odbco_module :: Module @@ -242,12 +243,15 @@ addBinNameReader HscEnv {..} bh' = do pure $ BinName nm 1 -> do occ <- mkVarOccFS <$> get bh - u <- takeUniqFromNameCache hsc_NC - nm' <- evaluate $ mkInternalName u occ noSrcSpan + -- We don't want to get a new unique from the NameCache each time we + -- see a name. + nm' <- unsafeInterleaveIO $ do + u <- takeUniqFromNameCache hsc_NC + evaluate $ mkInternalName u occ noSrcSpan fmap BinName $ atomicModifyIORef' env_ref $ \env -> case lookupOccEnv env occ of Just nm -> (env, nm) - _ -> (extendOccEnv env occ nm', nm') + _ -> nm' `seq` (extendOccEnv env occ nm', nm') _ -> panic "Binary BinName: invalid byte" -- Note [Serializing Names in bytecode] ===================================== compiler/GHC/Driver/Backpack.hs ===================================== @@ -786,8 +786,8 @@ summariseRequirement pn mod_name = do env <- getBkpEnv src_hash <- liftIO $ getFileHash (bkp_filename env) - hi_timestamp <- liftIO $ modificationTimeIfExists (ml_hi_file location) - hie_timestamp <- liftIO $ modificationTimeIfExists (ml_hie_file location) + hi_timestamp <- liftIO $ modificationTimeIfExists (ml_hi_file_ospath location) + hie_timestamp <- liftIO $ modificationTimeIfExists (ml_hie_file_ospath location) let loc = srcLocSpan (mkSrcLoc (mkFastString (bkp_filename env)) 1 1) let fc = hsc_FC hsc_env @@ -872,8 +872,8 @@ hsModuleToModSummary home_keys pn hsc_src modname HsSrcFile -> os "hs") hsc_src -- This duplicates a pile of logic in GHC.Driver.Make - hi_timestamp <- liftIO $ modificationTimeIfExists (ml_hi_file location) - hie_timestamp <- liftIO $ modificationTimeIfExists (ml_hie_file location) + hi_timestamp <- liftIO $ modificationTimeIfExists (ml_hi_file_ospath location) + hie_timestamp <- liftIO $ modificationTimeIfExists (ml_hie_file_ospath location) -- Also copied from 'getImports' let (src_idecls, ord_idecls) = partition ((== IsBoot) . ideclSource . unLoc) imps ===================================== compiler/GHC/Driver/Downsweep.hs ===================================== @@ -1264,7 +1264,7 @@ checkSummaryHash | ms_hs_hash old_summary == src_hash && not (gopt Opt_ForceRecomp (hsc_dflags hsc_env)) = do -- update the object-file timestamp - obj_timestamp <- modificationTimeIfExists (ml_obj_file location) + obj_timestamp <- modificationTimeIfExists (ml_obj_file_ospath location) -- We have to repopulate the Finder's cache for file targets -- because the file might not even be on the regular search path @@ -1276,8 +1276,8 @@ checkSummaryHash hsc_src = ms_hsc_src old_summary addModuleToFinder fc mod location hsc_src - hi_timestamp <- modificationTimeIfExists (ml_hi_file location) - hie_timestamp <- modificationTimeIfExists (ml_hie_file location) + hi_timestamp <- modificationTimeIfExists (ml_hi_file_ospath location) + hie_timestamp <- modificationTimeIfExists (ml_hie_file_ospath location) return $ Right ( old_summary @@ -1481,11 +1481,11 @@ data MakeNewModSummary makeNewModSummary :: HscEnv -> MakeNewModSummary -> IO ModSummary makeNewModSummary hsc_env MakeNewModSummary{..} = do let PreprocessedImports{..} = nms_preimps - obj_timestamp <- modificationTimeIfExists (ml_obj_file nms_location) - dyn_obj_timestamp <- modificationTimeIfExists (ml_dyn_obj_file nms_location) - hi_timestamp <- modificationTimeIfExists (ml_hi_file nms_location) - hie_timestamp <- modificationTimeIfExists (ml_hie_file nms_location) - bytecode_timestamp <- modificationTimeIfExists (ml_bytecode_file nms_location) + obj_timestamp <- modificationTimeIfExists (ml_obj_file_ospath nms_location) + dyn_obj_timestamp <- modificationTimeIfExists (ml_dyn_obj_file_ospath nms_location) + hi_timestamp <- modificationTimeIfExists (ml_hi_file_ospath nms_location) + hie_timestamp <- modificationTimeIfExists (ml_hie_file_ospath nms_location) + bytecode_timestamp <- modificationTimeIfExists (ml_bytecode_file_ospath nms_location) extra_sig_imports <- findExtraSigImports hsc_env nms_hsc_src pi_mod_name (implicit_sigs, _inst_deps) <- implicitRequirementsShallow (hscSetActiveUnitId (moduleUnitId nms_mod) hsc_env) pi_theimps ===================================== compiler/GHC/Driver/Main.hs ===================================== @@ -1088,7 +1088,7 @@ loadIfaceByteCode hsc_env iface location type_env = linkable $ pure $ BCOs $ (ByteCodeObject (mi_module iface) bcos fos) linkable parts = do - if_time <- modificationTimeIfExists (ml_hi_file location) + if_time <- modificationTimeIfExists (ml_hi_file_ospath location) time <- maybe getCurrentTime pure if_time return $! Linkable time (mi_module iface) parts @@ -1109,7 +1109,7 @@ loadIfaceByteCodeLazy hsc_env iface location type_env = linkable $ NE.singleton (BCOs (ByteCodeObject (mi_module iface) bcos fos)) linkable parts = do - if_time <- modificationTimeIfExists (ml_hi_file location) + if_time <- modificationTimeIfExists (ml_hi_file_ospath location) time <- maybe getCurrentTime pure if_time return $!Linkable time (mi_module iface) parts @@ -2230,7 +2230,7 @@ generateAndWriteByteCodeLinkable hsc_env cgguts mod_location = do -- Either, get the same time as the .gbc file if it exists, or just the current time. -- It's important the time of the linkable matches the time of the .gbc file for recompilation -- checking. - bco_time <- maybe getCurrentTime pure =<< modificationTimeIfExists (ml_bytecode_file mod_location) + bco_time <- maybe getCurrentTime pure =<< modificationTimeIfExists (ml_bytecode_file_ospath mod_location) loadByteCodeObjectLinkable bco_time bco_object mkByteCodeObject :: HscEnv -> Module -> ModLocation -> CgInteractiveGuts -> IO ByteCodeObject ===================================== compiler/GHC/Driver/Pipeline/Execute.hs ===================================== @@ -722,17 +722,18 @@ runHscPhase pipe_env hsc_env0 input_fn src_flavour = do -- the object file for one module.) -- Note the nasty duplication with the same computation in compileFile above location <- mkOneShotModLocation pipe_env dflags src_flavour mod_name - let o_file = ml_obj_file location -- The real object file - hi_file = ml_hi_file location - hie_file = ml_hie_file location - dyn_o_file = ml_dyn_obj_file location + let o_file = ml_obj_file_ospath location -- The real object file + hi_file = ml_hi_file_ospath location + hie_file = ml_hie_file_ospath location + dyn_o_file = ml_dyn_obj_file_ospath location + bytecode_file = ml_bytecode_file_ospath location src_hash <- getFileHash (basename <.> suff) hi_date <- modificationTimeIfExists hi_file hie_date <- modificationTimeIfExists hie_file o_mod <- modificationTimeIfExists o_file dyn_o_mod <- modificationTimeIfExists dyn_o_file - bytecode_date <- modificationTimeIfExists (ml_bytecode_file location) + bytecode_date <- modificationTimeIfExists bytecode_file -- Tell the finder cache about this module mod <- do ===================================== compiler/GHC/Linker/Loader.hs ===================================== @@ -658,7 +658,7 @@ findWholeCoreBindings hsc_env mod = do findBytecodeLinkableMaybe :: HscEnv -> Module -> ModLocation -> IO (Maybe Linkable) findBytecodeLinkableMaybe hsc_env mod locn = do - let bytecode_fn = ml_bytecode_file locn + let bytecode_fn = ml_bytecode_file_ospath locn maybe_bytecode_time <- modificationTimeIfExists bytecode_fn case maybe_bytecode_time of Nothing -> return Nothing @@ -668,7 +668,7 @@ findBytecodeLinkableMaybe hsc_env mod locn = do _ <- initIfaceLoad hsc_env $ loadInterface (text "get_reachable_nodes" <+> parens (ppr mod)) mod ImportBySystem - bco <- readBinByteCode hsc_env bytecode_fn + bco <- readBinByteCode hsc_env (ml_bytecode_file locn) Just <$> loadByteCodeObjectLinkable bytecode_time bco get_reachable_nodes :: HscEnv -> [Module] -> IO ([Module], UniqDSet UnitId) ===================================== compiler/GHC/Unit/Finder.hs ===================================== @@ -826,7 +826,7 @@ mkStubPaths fopts mod location = do findObjectLinkableMaybe :: Module -> ModLocation -> IO (Maybe Linkable) findObjectLinkableMaybe mod locn = do let obj_fn = ml_obj_file locn - maybe_obj_time <- modificationTimeIfExists obj_fn + maybe_obj_time <- modificationTimeIfExists (ml_obj_file_ospath locn) case maybe_obj_time of Nothing -> return Nothing Just obj_time -> liftM Just (findObjectLinkable mod obj_fn obj_time) ===================================== compiler/GHC/Utils/Misc.hs ===================================== @@ -137,6 +137,8 @@ import Control.Monad ( guard ) import Control.Monad.IO.Class ( MonadIO, liftIO ) import System.IO.Error as IO ( isDoesNotExistError ) import System.Directory ( doesDirectoryExist, getModificationTime, renameFile ) +import qualified System.Directory.OsPath as OsPath +import System.OsPath (OsPath) import System.FilePath import Data.Bifunctor ( first, second ) @@ -1248,9 +1250,9 @@ getModificationUTCTime = getModificationTime -- -------------------------------------------------------------- -- check existence & modification time at the same time -modificationTimeIfExists :: FilePath -> IO (Maybe UTCTime) +modificationTimeIfExists :: OsPath -> IO (Maybe UTCTime) modificationTimeIfExists f = - (do t <- getModificationUTCTime f; return (Just t)) + (do t <- OsPath.getModificationTime f; return (Just t)) `catchIO` \e -> if isDoesNotExistError e then return Nothing else ioError e View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/2172b324ade01d9c8127e3a6b1b1c6… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/2172b324ade01d9c8127e3a6b1b1c6… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/ospath-modification-time
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed new branch wip/ospath-modification-time at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/ospath-modification-time You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/supersven/T22859_increase-threadDelay
by Sven Tennie (＠supersven) 01 Oct '25

01 Oct '25

Sven Tennie pushed new branch wip/supersven/T22859_increase-threadDelay at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/supersven/T22859_increase-thr… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/rename-bytecode
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed new branch wip/rename-bytecode at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/rename-bytecode You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/fix-packedcons-ways
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed new branch wip/fix-packedcons-ways at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/fix-packedcons-ways You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/gbc-files] 59 commits: Improve pretty printer for HsExpr
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed to branch wip/gbc-files at Glasgow Haskell Compiler / GHC Commits: 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. - - - - - 9ac607ec by Matthew Pickering at 2025-10-01T09:36:11+01:00 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 - - - - - d3747240 by Matthew Pickering at 2025-10-01T09:36:29+01:00 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. - - - - - f00b3729 by Matthew Pickering at 2025-10-01T09:36:29+01:00 Rename interpreterBackend to bytecodeBackend - - - - - 50a2f7ae by Cheng Shao at 2025-10-01T09:36:29+01:00 compiler: implement and test bytecode serialization logic - - - - - b3819400 by Matthew Pickering at 2025-10-01T09:36:29+01:00 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`. - - - - - 93e0aca5 by Matthew Pickering at 2025-10-01T09:36:29+01:00 Remove LazyBCOs - - - - - 009430aa by Matthew Pickering at 2025-10-01T09:36:30+01:00 Print path to .gbc file if it's generated. - - - - - b5cfa2cf by Matthew Pickering at 2025-10-01T09:36:30+01:00 Normalised ghci output - - - - - 9733cb43 by Matthew Pickering at 2025-10-01T09:36:30+01:00 Fix loading of objects - - - - - 5094be61 by Matthew Pickering at 2025-10-01T09:36:30+01:00 Add performance test for consuming bytecode files - - - - - 1f43fe76 by Matthew Pickering at 2025-10-01T09:36:30+01:00 gbc files - - - - - 053c85a7 by Matthew Pickering at 2025-10-01T09:36:30+01:00 Fix progress messages - - - - - 7bfba906 by Matthew Pickering at 2025-10-01T09:36:30+01:00 Accept new test output - - - - - b4e87a78 by Matthew Pickering at 2025-10-01T09:36:30+01:00 Fix unused binding - - - - - b9d670c1 by Matthew Pickering at 2025-10-01T10:56:42+01:00 Fix test ways - - - - - 2172b324 by Matthew Pickering at 2025-10-01T11:10:27+01:00 Comment! - - - - - 248 changed files: - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/ByteCode/Breakpoints.hs - + compiler/GHC/ByteCode/Serialize.hs - compiler/GHC/ByteCode/Types.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/LA64/Instr.hs - compiler/GHC/CmmToAsm/LA64/Ppr.hs - compiler/GHC/CmmToAsm/RV64/CodeGen.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core/Opt/ConstantFold.hs - compiler/GHC/Core/Opt/Pipeline.hs - compiler/GHC/Core/Opt/Pipeline/Types.hs - compiler/GHC/Core/Opt/Simplify/Env.hs - compiler/GHC/Core/Ppr.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Rules/Config.hs - compiler/GHC/Core/Unfold.hs - compiler/GHC/Data/FlatBag.hs - compiler/GHC/Data/SmallArray.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/Config/Core/Rules.hs - compiler/GHC/Driver/Config/Finder.hs - compiler/GHC/Driver/Downsweep.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/Messager.hs - compiler/GHC/Driver/Pipeline.hs - compiler/GHC/Driver/Pipeline/Execute.hs - compiler/GHC/Driver/Plugins.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/HsToCore.hs - compiler/GHC/HsToCore/Breakpoints.hs - compiler/GHC/HsToCore/Errors/Ppr.hs - compiler/GHC/HsToCore/Pmc/Ppr.hs - compiler/GHC/HsToCore/Pmc/Types.hs - compiler/GHC/HsToCore/Usage.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Iface/Tidy/StaticPtrTable.hs - compiler/GHC/Linker/Deps.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/MacOS.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Llvm/Ppr.hs - compiler/GHC/Llvm/Types.hs - compiler/GHC/Parser/Lexer.x - compiler/GHC/Parser/Lexer/String.x - compiler/GHC/Runtime/Eval.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/Tc/Errors/Ppr.hs - compiler/GHC/Types/Hint/Ppr.hs - compiler/GHC/Types/SptEntry.hs - compiler/GHC/Types/Tickish.hs - compiler/GHC/Unit/Finder.hs - compiler/GHC/Unit/Finder/Types.hs - compiler/GHC/Unit/Module/Graph.hs - compiler/GHC/Unit/Module/Location.hs - compiler/GHC/Unit/Module/ModSummary.hs - compiler/GHC/Unit/Module/WholeCoreBindings.hs - compiler/GHC/Utils/Binary.hs - compiler/GHC/Utils/Outputable.hs - compiler/GHC/Utils/Ppr.hs - compiler/ghc.cabal.in - configure.ac - distrib/configure.ac.in - docs/users_guide/debugging.rst - docs/users_guide/exts/pragmas.rst - docs/users_guide/exts/scoped_type_variables.rst - docs/users_guide/phases.rst - docs/users_guide/profiling.rst - docs/users_guide/separate_compilation.rst - ghc/Main.hs - hadrian/src/Rules/Generate.hs - hadrian/src/Settings/Builders/DeriveConstants.hs - hadrian/src/Settings/Packages.hs - libraries/base/changelog.md - libraries/ghc-internal/cbits/atomic.c - libraries/ghc-internal/cbits/ctz.c - libraries/ghc-internal/src/GHC/Internal/Base.hs - libraries/ghc-internal/src/GHC/Internal/RTS/Flags.hsc - libraries/ghci/GHCi/Message.hs - libraries/ghci/GHCi/ObjLink.hs - libraries/ghci/GHCi/Run.hs - m4/fp_cmm_cpp_cmd_with_args.m4 - − m4/fp_set_cflags_c99.m4 - m4/fp_setup_windows_toolchain.m4 - m4/fptools_set_c_ld_flags.m4 - m4/ghc_toolchain.m4 - rts/Apply.cmm - rts/CloneStack.h - rts/ExecPage.c - rts/Interpreter.c - rts/Prelude.h - rts/ProfHeap.c - rts/RetainerSet.c - rts/RtsFlags.c - rts/RtsStartup.c - rts/RtsSymbols.c - rts/ThreadPaused.c - rts/include/Rts.h - rts/include/RtsAPI.h - rts/include/Stg.h - rts/include/rts/Flags.h - rts/include/rts/NonMoving.h - rts/include/rts/StableName.h - rts/include/rts/StablePtr.h - rts/include/rts/Types.h - − rts/include/stg/DLL.h - rts/include/stg/MiscClosures.h - rts/js/mem.js - rts/rts.cabal - rts/sm/BlockAlloc.c - rts/sm/Evac.h - rts/sm/Storage.c - rts/wasm/JSFFI.c - testsuite/driver/testglobals.py - testsuite/driver/testlib.py - testsuite/tests/arrows/gadt/T17423.stderr - testsuite/tests/bytecode/T24634/T24634a.stdout - testsuite/tests/bytecode/T24634/T24634b.stdout - + testsuite/tests/codeGen/should_compile/T20298a.hs - + testsuite/tests/codeGen/should_compile/T20298a.stderr - + testsuite/tests/codeGen/should_compile/T20298b.hs - + testsuite/tests/codeGen/should_compile/T20298b.stderr - + testsuite/tests/codeGen/should_compile/T20298c.hs - + testsuite/tests/codeGen/should_compile/T20298c.stderr - testsuite/tests/codeGen/should_compile/all.T - testsuite/tests/count-deps/CountDepsAst.stdout - testsuite/tests/count-deps/CountDepsParser.stdout - + testsuite/tests/cross/should_run/T26449.hs - + testsuite/tests/cross/should_run/all.T - testsuite/tests/driver/T5313.hs - + testsuite/tests/driver/bytecode-object/A.hs - + testsuite/tests/driver/bytecode-object/BytecodeForeign.c - + testsuite/tests/driver/bytecode-object/BytecodeForeign.hs - + testsuite/tests/driver/bytecode-object/BytecodeMain.hs - + testsuite/tests/driver/bytecode-object/BytecodeTest.hs - + testsuite/tests/driver/bytecode-object/Makefile - + testsuite/tests/driver/bytecode-object/all.T - + testsuite/tests/driver/bytecode-object/bytecode_object12.stderr - + testsuite/tests/driver/bytecode-object/bytecode_object13.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object14.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object15.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object16.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object17.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object18.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object19.script - + testsuite/tests/driver/bytecode-object/bytecode_object19.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object25.script - + testsuite/tests/driver/bytecode-object/bytecode_object25.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object4.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object5.stdout - + testsuite/tests/driver/bytecode-object/bytecode_object6.stdout - testsuite/tests/driver/fat-iface/T22405/T22405.stdout - testsuite/tests/driver/fat-iface/T22405/T22405b.stdout - testsuite/tests/driver/fat-iface/fat011.stderr - testsuite/tests/ghc-api/T10052/T10052.hs - testsuite/tests/ghc-api/T8639_api.hs - testsuite/tests/ghc-api/apirecomp001/myghc.hs - + testsuite/tests/ghci-wasm/T26431.hs - + testsuite/tests/ghci-wasm/T26431.stdout - testsuite/tests/ghci-wasm/all.T - testsuite/tests/ghci/linking/dyn/T3372.hs - testsuite/tests/ghci/should_run/PackedDataCon/packeddatacon.T - testsuite/tests/ghci/should_run/UnboxedTuples/unboxedtuples.T - testsuite/tests/ghci/should_run/UnliftedDataTypeInterp/unlifteddatatypeinterp.T - testsuite/tests/indexed-types/should_compile/PushedInAsGivens.stderr - testsuite/tests/indexed-types/should_fail/T26176.stderr - testsuite/tests/indexed-types/should_fail/T2693.stderr - testsuite/tests/indexed-types/should_fail/T4093b.stderr - 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+ testsuite/tests/perf/compiler/MultiLayerModulesDefsGhciWithBytecodeFiles.script - testsuite/tests/perf/compiler/all.T - testsuite/tests/plugins/annotation-plugin/SayAnnNames.hs - testsuite/tests/plugins/late-plugin/LatePlugin.hs - testsuite/tests/plugins/simple-plugin/Simple/ReplacePlugin.hs - testsuite/tests/polykinds/T13393.stderr - testsuite/tests/rep-poly/T12709.stderr - testsuite/tests/rts/linker/T2615.hs - testsuite/tests/simplCore/should_compile/simpl017.stderr - testsuite/tests/simplStg/should_compile/T22840.stderr - testsuite/tests/th/T10945.stderr - testsuite/tests/th/TH_StaticPointers02.stderr - testsuite/tests/typecheck/should_compile/T11339.stderr - testsuite/tests/typecheck/should_fail/DoExpansion3.stderr - testsuite/tests/typecheck/should_fail/T12177.stderr - testsuite/tests/typecheck/should_fail/T22707.stderr - testsuite/tests/typecheck/should_fail/T24064.stderr - + testsuite/tests/typecheck/should_fail/T26330.hs - + testsuite/tests/typecheck/should_fail/T26330.stderr - 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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/97b1d7f08bd7c206d613ba3a5dd1ad… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/97b1d7f08bd7c206d613ba3a5dd1ad… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/refactorLoadDecls] loader: Unify loadDecls and loadModuleLinkables functions
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed to branch wip/refactorLoadDecls at Glasgow Haskell Compiler / GHC Commits: 9ac607ec by Matthew Pickering at 2025-10-01T09:36:11+01:00 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 - - - - - 2 changed files: - compiler/GHC/Driver/Main.hs - compiler/GHC/Linker/Loader.hs Changes: ===================================== compiler/GHC/Driver/Main.hs ===================================== @@ -2777,10 +2777,12 @@ hscCompileCoreExpr' hsc_env srcspan ds_expr = do {- load it -} bco_time <- getCurrentTime - (fv_hvs, mods_needed, units_needed) <- loadDecls interp hsc_env srcspan $ + (mods_needed, units_needed) <- loadDecls interp hsc_env srcspan $ Linkable bco_time this_mod $ NE.singleton $ BCOs bcos + -- Get the foreign reference to the name we should have just loaded. + mhvs <- lookupFromLoadedEnv interp (idName binding_id) {- Get the HValue for the root -} - return (expectJust $ lookup (idName binding_id) fv_hvs, mods_needed, units_needed) + return (expectJust mhvs, mods_needed, units_needed) ===================================== compiler/GHC/Linker/Loader.hs ===================================== @@ -28,6 +28,7 @@ module GHC.Linker.Loader , withExtendedLoadedEnv , extendLoadedEnv , deleteFromLoadedEnv + , lookupFromLoadedEnv -- * Internals , allocateBreakArrays , rmDupLinkables @@ -213,6 +214,15 @@ deleteFromLoadedEnv interp to_remove = return $ modifyClosureEnv pls $ \ce -> delListFromNameEnv ce to_remove +-- | Have we already loaded a name into the interpreter? +lookupFromLoadedEnv :: Interp -> Name -> IO (Maybe ForeignHValue) +lookupFromLoadedEnv interp name = do + mstate <- getLoaderState interp + return $ do + pls <- mstate + res <- lookupNameEnv (closure_env (linker_env pls)) name + return (snd res) + -- | Load the module containing the given Name and get its associated 'HValue'. -- -- Throws a 'ProgramError' if loading fails or the name cannot be found. @@ -258,7 +268,7 @@ loadDependencies interp hsc_env pls span needed_mods = do -- Link the packages and modules required pls1 <- loadPackages' interp hsc_env (ldUnits deps) pls - (pls2, succ) <- loadModuleLinkables interp hsc_env pls1 (ldNeededLinkables deps) + (pls2, succ) <- loadExternalModuleLinkables interp hsc_env pls1 (ldNeededLinkables deps) let this_pkgs_loaded = udfmRestrictKeys all_pkgs_loaded $ getUniqDSet trans_pkgs_needed all_pkgs_loaded = pkgs_loaded pls2 trans_pkgs_needed = unionManyUniqDSets (this_pkgs_needed : [ loaded_pkg_trans_deps pkg @@ -684,42 +694,23 @@ get_reachable_nodes hsc_env mods ********************************************************************* -} -loadDecls :: Interp -> HscEnv -> SrcSpan -> Linkable -> IO ([(Name, ForeignHValue)], [Linkable], PkgsLoaded) +-- | Load the dependencies of a linkable, and then load the linkable itself. +loadDecls :: Interp -> HscEnv -> SrcSpan -> Linkable -> IO ([Linkable], PkgsLoaded) loadDecls interp hsc_env span linkable = do -- Initialise the linker (if it's not been done already) initLoaderState interp hsc_env -- Take lock for the actual work. modifyLoaderState interp $ \pls0 -> do - -- Link the foreign objects first; BCOs in linkable are ignored here. - (pls1, objs_ok) <- loadObjects interp hsc_env pls0 [linkable] - when (failed objs_ok) $ throwGhcExceptionIO $ ProgramError "loadDecls: failed to load foreign objects" - -- Link the packages and modules required - (pls, ok, links_needed, units_needed) <- loadDependencies interp hsc_env pls1 span needed_mods + (pls, ok, links_needed, units_needed) <- loadDependencies interp hsc_env pls0 span needed_mods if failed ok - then throwGhcExceptionIO (ProgramError "") + then throwGhcExceptionIO (ProgramError "could not load dependencies for decls") else do - -- Link the expression itself - let le = linker_env pls - let lb = linked_breaks pls - le2_itbl_env <- linkITbls interp (itbl_env le) (concat $ map bc_itbls cbcs) - le2_addr_env <- foldlM (\env cbc -> allocateTopStrings interp (bc_strs cbc) env) (addr_env le) cbcs - le2_breakarray_env <- allocateBreakArrays interp (breakarray_env lb) (catMaybes $ map bc_breaks cbcs) - le2_ccs_env <- allocateCCS interp (ccs_env lb) (catMaybes $ map bc_breaks cbcs) - let le2 = le { itbl_env = le2_itbl_env - , addr_env = le2_addr_env } - let lb2 = lb { breakarray_env = le2_breakarray_env - , ccs_env = le2_ccs_env } - - -- Link the necessary packages and linkables - new_bindings <- linkSomeBCOs interp (pkgs_loaded pls) le2 lb2 cbcs - nms_fhvs <- makeForeignNamedHValueRefs interp new_bindings - let ce2 = extendClosureEnv (closure_env le2) nms_fhvs - !pls2 = pls { linker_env = le2 { closure_env = ce2 } - , linked_breaks = lb2 } - mapM_ (linkSptEntry interp ce2) (concatMap bc_spt_entries cbcs) - return (pls2, (nms_fhvs, links_needed, units_needed)) + (pls2, ok2) <- loadInternalModuleLinkables interp hsc_env pls [linkable] + when (failed ok2) $ + throwGhcExceptionIO (ProgramError "could not load linkable for decls") + return (pls2, (links_needed, units_needed)) where cbcs = linkableBCOs linkable @@ -761,8 +752,29 @@ loadModule interp hsc_env mod = do ********************************************************************* -} -loadModuleLinkables :: Interp -> HscEnv -> LoaderState -> [Linkable] -> IO (LoaderState, SuccessFlag) -loadModuleLinkables interp hsc_env pls linkables +-- | Which closures from a Linkable to add to the 'ClosureEnv' in the 'LoaderState' +data KeepModuleLinkableDefinitions = KeepAllDefinitions -- ^ Keep all definitions + | KeepExternalDefinitions -- ^ Only keep external definitions + +-- | Interpret a 'KeepModuleLinkableDefinitions' specification to a predictate on 'Name' +keepDefinitions :: KeepModuleLinkableDefinitions -> (Name -> Bool) +keepDefinitions KeepAllDefinitions = const True +keepDefinitions KeepExternalDefinitions = isExternalName + +-- | Load a linkable from a module, and only add externally visible names to the +-- environment. +loadExternalModuleLinkables :: Interp -> HscEnv -> LoaderState -> [Linkable] -> IO (LoaderState, SuccessFlag) +loadExternalModuleLinkables interp hsc_env pls linkables = + loadModuleLinkables interp hsc_env pls KeepExternalDefinitions linkables + +-- | Load a linkable from a module, and add all the names from the linkable into the +-- closure environment. +loadInternalModuleLinkables :: Interp -> HscEnv -> LoaderState -> [Linkable] -> IO (LoaderState, SuccessFlag) +loadInternalModuleLinkables interp hsc_env pls linkables = + loadModuleLinkables interp hsc_env pls KeepAllDefinitions linkables + +loadModuleLinkables :: Interp -> HscEnv -> LoaderState -> KeepModuleLinkableDefinitions -> [Linkable] -> IO (LoaderState, SuccessFlag) +loadModuleLinkables interp hsc_env pls keep_spec linkables = mask_ $ do -- don't want to be interrupted by ^C in here debugTraceMsg (hsc_logger hsc_env) 3 $ @@ -777,7 +789,7 @@ loadModuleLinkables interp hsc_env pls linkables if failed ok_flag then return (pls1, Failed) else do - pls2 <- dynLinkBCOs interp pls1 bcos + pls2 <- dynLinkBCOs interp pls1 keep_spec bcos return (pls2, Succeeded) where (objs, bcos) = partitionLinkables linkables @@ -920,8 +932,8 @@ rmDupLinkables already ls ********************************************************************* -} -dynLinkBCOs :: Interp -> LoaderState -> [Linkable] -> IO LoaderState -dynLinkBCOs interp pls bcos = do +dynLinkBCOs :: Interp -> LoaderState -> KeepModuleLinkableDefinitions -> [Linkable] -> IO LoaderState +dynLinkBCOs interp pls keep_spec bcos = do let (bcos_loaded', new_bcos) = rmDupLinkables (bcos_loaded pls) bcos pls1 = pls { bcos_loaded = bcos_loaded' } @@ -945,7 +957,7 @@ dynLinkBCOs interp pls bcos = do names_and_refs <- linkSomeBCOs interp (pkgs_loaded pls) le2 lb2 cbcs -- We only want to add the external ones to the ClosureEnv - let (to_add, to_drop) = partition (isExternalName.fst) names_and_refs + let (to_add, to_drop) = partition (keepDefinitions keep_spec . fst) names_and_refs -- Immediately release any HValueRefs we're not going to add freeHValueRefs interp (map snd to_drop) View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9ac607ece176e73e4a3f68205b8f1b6… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/9ac607ece176e73e4a3f68205b8f1b6… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/T26457] 12 commits: compiler/ghci: replace the LoadDLL message with LoadDLLs
by Simon Peyton Jones (＠simonpj) 01 Oct '25

01 Oct '25

Simon Peyton Jones pushed to branch wip/T26457 at Glasgow Haskell Compiler / GHC Commits: 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. - - - - - 33 changed files: - compiler/GHC.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/Core/Unify.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/Plugins.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Iface/Tidy/StaticPtrTable.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/MacOS.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Runtime/Interpreter.hs - compiler/GHC/Runtime/Interpreter/Types.hs - configure.ac - distrib/configure.ac.in - hadrian/src/Settings/Packages.hs - libraries/ghci/GHCi/Message.hs - libraries/ghci/GHCi/ObjLink.hs - libraries/ghci/GHCi/Run.hs - m4/fp_cmm_cpp_cmd_with_args.m4 - − m4/fp_set_cflags_c99.m4 - rts/Apply.cmm - rts/Interpreter.c - rts/ThreadPaused.c - + testsuite/tests/ghci-wasm/T26431.hs - + testsuite/tests/ghci-wasm/T26431.stdout - testsuite/tests/ghci-wasm/all.T - testsuite/tests/rts/linker/T2615.hs - + testsuite/tests/typecheck/should_compile/T26457.hs - testsuite/tests/typecheck/should_compile/all.T - utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cc.hs - utils/ghc-toolchain/src/GHC/Toolchain/Tools/Cpp.hs - utils/jsffi/dyld.mjs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/771aaa748c4e0118baa8dd1af46a9e… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/771aaa748c4e0118baa8dd1af46a9e… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/refactorLoadDecls] 44 commits: Improve pretty printer for HsExpr
by Matthew Pickering (＠mpickering) 01 Oct '25

01 Oct '25

Matthew Pickering pushed to branch wip/refactorLoadDecls at Glasgow Haskell Compiler / GHC Commits: 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. - - - - - 4be8710b by Matthew Pickering at 2025-10-01T09:16:57+01:00 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 - - - - - 175 changed files: - compiler/GHC.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/LA64/Instr.hs - compiler/GHC/CmmToAsm/LA64/Ppr.hs - compiler/GHC/CmmToAsm/RV64/CodeGen.hs - compiler/GHC/CmmToLlvm/CodeGen.hs - compiler/GHC/Core/Opt/ConstantFold.hs - compiler/GHC/Core/Opt/Pipeline.hs - compiler/GHC/Core/Opt/Pipeline/Types.hs - compiler/GHC/Core/Opt/Simplify/Env.hs - compiler/GHC/Core/Ppr.hs - compiler/GHC/Core/Rules.hs - compiler/GHC/Core/Rules/Config.hs - compiler/GHC/Core/Unfold.hs - compiler/GHC/Driver/Config/Core/Rules.hs - compiler/GHC/Driver/DynFlags.hs - compiler/GHC/Driver/Flags.hs - compiler/GHC/Driver/Main.hs - compiler/GHC/Driver/Make.hs - compiler/GHC/Driver/Plugins.hs - compiler/GHC/Driver/Session.hs - compiler/GHC/Hs/Expr.hs - compiler/GHC/HsToCore.hs - compiler/GHC/HsToCore/Errors/Ppr.hs - compiler/GHC/HsToCore/Pmc/Ppr.hs - compiler/GHC/HsToCore/Pmc/Types.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Iface/Tidy/StaticPtrTable.hs - compiler/GHC/Linker/Loader.hs - compiler/GHC/Linker/MacOS.hs - compiler/GHC/Linker/Types.hs - compiler/GHC/Llvm/Ppr.hs - compiler/GHC/Llvm/Types.hs - compiler/GHC/Parser/Lexer.x - compiler/GHC/Parser/Lexer/String.x - compiler/GHC/Runtime/Heap/Inspect.hs - compiler/GHC/Runtime/Interpreter.hs - compiler/GHC/Runtime/Interpreter/Types.hs - compiler/GHC/Runtime/Loader.hs - compiler/GHC/Tc/Errors/Ppr.hs - compiler/GHC/Types/Hint/Ppr.hs - compiler/GHC/Utils/Outputable.hs - compiler/GHC/Utils/Ppr.hs - configure.ac - distrib/configure.ac.in - docs/users_guide/debugging.rst - docs/users_guide/exts/pragmas.rst - docs/users_guide/exts/scoped_type_variables.rst - docs/users_guide/profiling.rst - hadrian/src/Rules/Generate.hs - hadrian/src/Settings/Builders/DeriveConstants.hs - hadrian/src/Settings/Packages.hs - libraries/base/changelog.md - libraries/ghc-internal/cbits/atomic.c - libraries/ghc-internal/cbits/ctz.c - libraries/ghc-internal/src/GHC/Internal/Base.hs - libraries/ghc-internal/src/GHC/Internal/RTS/Flags.hsc - 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utils/jsffi/dyld.mjs The diff was not included because it is too large. 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