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[Git][ghc/ghc][wip/romes/hadrian-cross-stage2-rebase_SVEN_FIXED] Deal with the internal-interpreter flag
by Sven Tennie (＠supersven) 17 Dec '25

17 Dec '25

Sven Tennie pushed to branch wip/romes/hadrian-cross-stage2-rebase_SVEN_FIXED at Glasgow Haskell Compiler / GHC Commits: b01eb98e by Sven Tennie at 2025-12-17T08:16:22+01:00 Deal with the internal-interpreter flag - - - - - 1 changed file: - hadrian/src/Settings/Packages.hs Changes: ===================================== hadrian/src/Settings/Packages.hs ===================================== @@ -88,12 +88,11 @@ packageArgs = do -- 1. ghcWithInterpreter must be True ("Use interpreter" = -- "YES") -- 2. For non-cross case it can be enabled - -- 3. For cross case, disable for stage0 since that runs - -- on the host and must rely on external interpreter to - -- load target code, otherwise enable for stage1 since - -- that runs on the target and can use target's own - -- ghci object linker - [ andM [expr (ghcWithInterpreter stage), orM [expr (notM cross), stage1, stage2]] `cabalFlag` "internal-interpreter" + -- 3. For cross case, disable for stage0 and stage1 since these run + -- on the host and must rely on external interpreter to load + -- target code, otherwise enable for stage2 since that runs on + -- the target and can use target's own ghci object linker + [ andM [expr (ghcWithInterpreter stage), orM [expr (notM cross), stage2]] `cabalFlag` "internal-interpreter" , orM [ notM cross, haveCurses ] `cabalFlag` "terminfo" , arg "-build-tool-depends" , staged (buildFlag UseLibzstd) `cabalFlag` "with-libzstd" @@ -115,7 +114,7 @@ packageArgs = do , compilerStageOption ghcDebugAssertions ? arg "-DDEBUG" ] , builder (Cabal Flags) ? mconcat - [ (expr (ghcWithInterpreter stage)) `cabalFlag` "internal-interpreter" + [ andM [expr (ghcWithInterpreter stage), orM [expr (notM cross), stage1]] `cabalFlag` "internal-interpreter" , ifM stage0 -- We build a threaded stage 1 if the bootstrapping compiler -- supports it. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b01eb98e8d69b3b20e35d3478ba1cbe… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/b01eb98e8d69b3b20e35d3478ba1cbe… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/hadrian-no-ghci-lib] hadrian: drop unused logic for building ghci libraries
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed to branch wip/hadrian-no-ghci-lib at Glasgow Haskell Compiler / GHC Commits: 8c4b70c3 by Cheng Shao at 2025-12-17T02:03:33+01:00 hadrian: drop unused logic for building ghci libraries This patch drops the unused logic for building ghci libraries in hadrian: - The term "ghci library" refers to an optional object file per library `HS*.o`, which is merged from multiple object files in that library using the `MergeObjects` builder in hadrian. - The original rationale of having a ghci library object, in addition to normal archives, was to speedup ghci loading, since the combined object is linked with a linker script to undo the effects of `-fsplit-sections` to reduce section count and make it easier for the RTS linker to handle. - However, most GHC builds enable `dynamicGhcPrograms` by default, in such cases the ghci library would already not be built. - `dynamicGhcPrograms` is disabled on Windows, but still we don't build the ghci library due to lack of functioning merge objects command. - The only case that we actually build ghci library objects, are alpine fully static bindists. However, for other reasons, split sections is already disabled for fully static builds anyway! - There will not be any regression if the ghci library objects are absent from a GHC global libdir when `dynamicGhcPrograms` is disabled. The RTS linker can already load the archives without any issue. Hence the removal. We now forcibly disable ghci libraries for all Cabal components, and rip out all logic related to `MergeObjects` and ghci libraries in hadrian. This also nicely cleans up some old todos and fixmes that are no longer relevant. Note that MergeObjects in hadrian is not the same thing as merge objects in the GHC driver. The latter is not affected by this patch. Co-authored-by: Codex <codex(a)openai.com> - - - - - 16 changed files: - − driver/utils/merge_sections.ld - hadrian/hadrian.cabal - hadrian/src/Builder.hs - hadrian/src/Context.hs - hadrian/src/Hadrian/Haskell/Cabal/Parse.hs - hadrian/src/Hadrian/Haskell/Cabal/Type.hs - hadrian/src/Hadrian/Haskell/Hash.hs - hadrian/src/Oracles/Flag.hs - hadrian/src/Rules.hs - hadrian/src/Rules/Library.hs - hadrian/src/Rules/Register.hs - hadrian/src/Settings/Builders/Cabal.hs - − hadrian/src/Settings/Builders/MergeObjects.hs - hadrian/src/Settings/Builders/SplitSections.hs - hadrian/src/Settings/Default.hs - hadrian/src/Settings/Packages.hs Changes: ===================================== driver/utils/merge_sections.ld deleted ===================================== @@ -1,26 +0,0 @@ -/* Linker script to undo -split-sections and merge all sections together when - * linking relocatable object files for GHCi. - * ld -r normally retains the individual sections, which is what you would want - * if the intention is to eventually link into a binary with --gc-sections, but - * it doesn't have a flag for directly doing what we want. */ -SECTIONS -{ - .text : { - *(.text*) - } - .rodata.cst16 : { - *(.rodata.cst16*) - } - .rodata : { - *(.rodata*) - } - .data.rel.ro : { - *(.data.rel.ro*) - } - .data : { - *(.data*) - } - .bss : { - *(.bss*) - } -} ===================================== hadrian/hadrian.cabal ===================================== @@ -115,7 +115,6 @@ executable hadrian , Settings.Builders.Ar , Settings.Builders.Ld , Settings.Builders.Make - , Settings.Builders.MergeObjects , Settings.Builders.SplitSections , Settings.Builders.RunTest , Settings.Builders.Win32Tarballs ===================================== hadrian/src/Builder.hs ===================================== @@ -178,7 +178,6 @@ data Builder = Alex | Ld Stage --- ^ linker | Make FilePath | Makeinfo - | MergeObjects Stage -- ^ linker to be used to merge object files. | Nm | Objdump | Python @@ -453,15 +452,6 @@ systemBuilderPath builder = case builder of HsCpp -> fromTargetTC "hs-cpp" (Toolchain.hsCppProgram . tgtHsCPreprocessor) JsCpp -> fromTargetTC "js-cpp" (maybeProg Toolchain.jsCppProgram . tgtJsCPreprocessor) Ld _ -> fromTargetTC "ld" (Toolchain.ccLinkProgram . tgtCCompilerLink) - -- MergeObjects Stage0 is a special case in case of - -- cross-compiling. We're building stage1, e.g. code which will be - -- executed on the host and hence we need to use host's merge - -- objects tool and not the target merge object tool. - -- Note, merge object tool is usually platform linker with some - -- parameters. E.g. building a cross-compiler on and for x86_64 - -- which will target ppc64 means that MergeObjects Stage0 will use - -- x86_64 linker and MergeObject _ will use ppc64 linker. - MergeObjects st -> fromStageTC st "merge-objects" (maybeProg Toolchain.mergeObjsProgram . tgtMergeObjs) Make _ -> fromKey "make" Makeinfo -> fromKey "makeinfo" Nm -> fromTargetTC "nm" (Toolchain.nmProgram . tgtNm) ===================================== hadrian/src/Context.hs ===================================== @@ -8,7 +8,7 @@ module Context ( -- * Paths contextDir, buildPath, buildDir, pkgInplaceConfig, pkgSetupConfigFile, pkgSetupConfigDir, pkgHaddockFile, pkgRegisteredLibraryFile, pkgRegisteredLibraryFileName, - pkgLibraryFile, pkgGhciLibraryFile, + pkgLibraryFile, pkgConfFile, pkgStampFile, resourcePath, objectPath, contextPath, getContextPath, libPath, distDir, distDynDir, haddockStatsFilesDir, ensureConfigured, autogenPath, rtsContext, rtsBuildPath, libffiBuildPath @@ -155,13 +155,6 @@ pkgLibraryFile context@Context {..} = do extension <- libsuf stage way pkgFile context "libHS" extension --- | Path to the GHCi library file of a given 'Context', e.g.: --- @_build/stage1/libraries/array/build/HSarray-0.5.1.0.o@. -pkgGhciLibraryFile :: Context -> Action FilePath -pkgGhciLibraryFile context@Context {..} = do - let extension = "" <.> osuf way - pkgFile context "HS" extension - -- | Path to the configuration file of a given 'Context'. pkgConfFile :: Context -> Action FilePath pkgConfFile Context {..} = do ===================================== hadrian/src/Hadrian/Haskell/Cabal/Parse.hs ===================================== @@ -334,7 +334,6 @@ resolveContextData context@Context {..} = do , depIncludeDirs = forDeps Installed.includeDirs , depCcOpts = forDeps Installed.ccOptions , depLdOpts = forDeps Installed.ldOptions - , buildGhciLib = C.withGHCiLib lbi' , frameworks = map C.getSymbolicPath (C.frameworks buildInfo) , packageDescription = pd' , contextLibdir = libdir install_dirs ===================================== hadrian/src/Hadrian/Haskell/Cabal/Type.hs ===================================== @@ -67,7 +67,6 @@ data ContextData = ContextData , depIncludeDirs :: [String] , depCcOpts :: [String] , depLdOpts :: [String] - , buildGhciLib :: Bool , frameworks :: [String] , packageDescription :: PackageDescription ===================================== hadrian/src/Hadrian/Haskell/Hash.hs ===================================== @@ -82,7 +82,6 @@ data PackageHashConfigInputs = PackageHashConfigInputs { pkgHashVanillaLib :: Bool, pkgHashSharedLib :: Bool, pkgHashDynExe :: Bool, - pkgHashGHCiLib :: Bool, pkgHashProfLib :: Bool, pkgHashProfExe :: Bool, pkgHashSplitObjs :: Bool, @@ -139,7 +138,6 @@ pkgHashOracle = void $ addOracleCache $ \(PkgHashKey (stag, pkg)) -> do pkgHashVanillaLib = vanilla `Set.member` libWays pkgHashSharedLib = dynamic `Set.member` libWays pkgHashDynExe = dyn_ghc - pkgHashGHCiLib = False pkgHashProfLib = profiling `Set.member` libWays pkgHashProfExe = pkg == ghc && ghcProfiled flav stag pkgHashSplitObjs = False -- Deprecated @@ -239,7 +237,6 @@ renderPackageHashInputs PackageHashInputs{ , opt "vanilla-lib" True show pkgHashVanillaLib , opt "shared-lib" False show pkgHashSharedLib , opt "dynamic-exe" False show pkgHashDynExe - , opt "ghci-lib" False show pkgHashGHCiLib , opt "prof-lib" False show pkgHashProfLib , opt "prof-exe" False show pkgHashProfExe , opt "split-objs" False show pkgHashSplitObjs ===================================== hadrian/src/Oracles/Flag.hs ===================================== @@ -3,7 +3,6 @@ module Oracles.Flag ( Flag (..), flag, getFlag, platformSupportsSharedLibs, - platformSupportsGhciObjects, targetRTSLinkerOnlySupportsSharedLibs, targetSupportsThreadedRts, targetSupportsSMP, @@ -71,15 +70,6 @@ flag f = do getFlag :: Flag -> Expr c b Bool getFlag = expr . flag --- | Does the platform support object merging (and therefore we can build GHCi objects --- when appropriate). -platformSupportsGhciObjects :: Action Bool --- FIXME: The name of the function is not entirely clear about which platform, it would be better named targetSupportsGhciObjects -platformSupportsGhciObjects = do - has_merge_objs <- isJust <$> queryTargetTarget tgtMergeObjs - only_shared_libs <- targetRTSLinkerOnlySupportsSharedLibs - pure $ has_merge_objs && not only_shared_libs - targetRTSLinkerOnlySupportsSharedLibs :: Action Bool targetRTSLinkerOnlySupportsSharedLibs = queryTargetTarget Toolchain.tgtRTSLinkerOnlySupportsSharedLibs ===================================== hadrian/src/Rules.hs ===================================== @@ -71,16 +71,9 @@ topLevelTargets = action $ do name stage pkg | isLibrary pkg = return (pkgName pkg) | otherwise = programName (vanillaContext stage pkg) --- TODO: Get rid of the @includeGhciLib@ hack. -- | Return the list of targets associated with a given 'Stage' and 'Package'. --- By setting the Boolean parameter to False it is possible to exclude the GHCi --- library from the targets, and avoid configuring the package to determine --- whether GHCi library needs to be built for it. We typically want to set --- this parameter to True, however it is important to set it to False when --- computing 'topLevelTargets', as otherwise the whole build gets sequentialised --- because packages are configured in the order respecting their dependencies. -packageTargets :: Bool -> Stage -> Package -> Action [FilePath] -packageTargets includeGhciLib stage pkg = do +packageTargets :: Stage -> Package -> Action [FilePath] +packageTargets stage pkg = do let context = vanillaContext stage pkg activePackages <- stagePackages stage if pkg `notElem` activePackages @@ -90,7 +83,7 @@ packageTargets includeGhciLib stage pkg = do let pkgWays = if pkg == rts then getRtsWays else getLibraryWays ways <- interpretInContext context pkgWays libs <- mapM (\w -> pkgLibraryFile (Context stage pkg w (error "unused"))) (Set.toList ways) - more <- Rules.Library.libraryTargets includeGhciLib context + more <- Rules.Library.libraryTargets context setupConfig <- pkgSetupConfigFile context return $ [setupConfig] ++ libs ++ more else do -- The only target of a program package is the executable. ===================================== hadrian/src/Rules/Library.hs ===================================== @@ -35,8 +35,6 @@ libraryRules = do root -/- "stage*/lib/**/libHS*-*.so" %> registerDynamicLib root "so" root -/- "stage*/lib/**/libHS*-*.dll" %> registerDynamicLib root "dll" root -/- "stage*/lib/**/*.a" %> registerStaticLib root - root -/- "**/HS*-*.o" %> buildGhciLibO root - root -/- "**/HS*-*.p_o" %> buildGhciLibO root -- * 'Action's for building libraries @@ -100,20 +98,6 @@ buildDynamicLib root suffix dynlibpath = do (quote pkgname ++ " (" ++ show stage ++ ", way " ++ show way ++ ").") dynlibpath synopsis --- | Build a "GHCi library" ('LibGhci') under the given build root, with the --- complete path of the file to build is given as the second argument. --- See Note [Merging object files for GHCi] in GHC.Driver.Pipeline. -buildGhciLibO :: FilePath -> FilePath -> Action () -buildGhciLibO root ghcilibPath = do - l@(BuildPath _ stage _ (LibGhci _ _ _ _)) - <- parsePath (parseBuildLibGhci root) - "<.o ghci lib (build) path parser>" - ghcilibPath - let context = libGhciContext l - objs <- allObjects context - need objs - build $ target context (MergeObjects stage) objs [ghcilibPath] - {- Note [Stamp Files] @@ -145,7 +129,7 @@ buildPackage root fp = do srcs <- hsSources ctx gens <- interpretInContext ctx generatedDependencies - lib_targets <- libraryTargets True ctx + lib_targets <- libraryTargets ctx need (srcs ++ gens ++ lib_targets) @@ -166,10 +150,6 @@ buildPackage root fp = do -- * Helpers --- | Return all Haskell and non-Haskell object files for the given 'Context'. -allObjects :: Context -> Action [FilePath] -allObjects context = (++) <$> nonHsObjects context <*> hsObjects context - -- | Return all the non-Haskell object files for the given library context -- (object files built from C, C-- and sometimes other things). nonHsObjects :: Context -> Action [FilePath] @@ -228,7 +208,7 @@ libraryObjects context = do -- | Coarse-grain 'need': make sure all given libraries are fully built. needLibrary :: [Context] -> Action () -needLibrary cs = need =<< concatMapM (libraryTargets True) cs +needLibrary cs = need =<< concatMapM libraryTargets cs -- * Library paths types and parsers @@ -241,9 +221,6 @@ data DynLibExt = So | Dylib deriving (Eq, Show) -- | > libHS<pkg name>-<pkg version>-<pkg hash>[_<way suffix>]-ghc<ghc version>.<so|dylib> data LibDyn = LibDyn String [Integer] String Way DynLibExt deriving (Eq, Show) --- | > HS<pkg name>-<pkg version>-<pkg hash>[_<way suffix>].o -data LibGhci = LibGhci String [Integer] String Way deriving (Eq, Show) - -- | Get the 'Context' corresponding to the build path for a given static library. libAContext :: BuildPath LibA -> Context libAContext (BuildPath _ stage pkgpath (LibA pkgname _ _ way)) = @@ -251,13 +228,6 @@ libAContext (BuildPath _ stage pkgpath (LibA pkgname _ _ way)) = where pkg = library pkgname pkgpath --- | Get the 'Context' corresponding to the build path for a given GHCi library. -libGhciContext :: BuildPath LibGhci -> Context -libGhciContext (BuildPath _ stage pkgpath (LibGhci pkgname _ _ way)) = - Context stage pkg way Final - where - pkg = library pkgname pkgpath - -- | Get the 'Context' corresponding to the build path for a given dynamic library. libDynContext :: BuildPath LibDyn -> Context libDynContext (BuildPath _ stage pkgpath (LibDyn pkgname _ _ way _)) = @@ -274,9 +244,8 @@ stampContext (BuildPath _ stage _ (PkgStamp pkgname _ _ way)) = data PkgStamp = PkgStamp String [Integer] String Way deriving (Eq, Show) - --- | Parse a path to a ghci library to be built, making sure the path starts --- with the given build root. +-- | Parse a path to a package stamp file, making sure the path starts with the +-- given build root. parseStampPath :: FilePath -> Parsec.Parsec String () (BuildPath PkgStamp) parseStampPath root = parseBuildPath root parseStamp @@ -297,12 +266,6 @@ parseBuildLibA :: FilePath -> Parsec.Parsec String () (BuildPath LibA) parseBuildLibA root = parseBuildPath root parseLibAFilename Parsec.<?> "build path for a static library" --- | Parse a path to a ghci library to be built, making sure the path starts --- with the given build root. -parseBuildLibGhci :: FilePath -> Parsec.Parsec String () (BuildPath LibGhci) -parseBuildLibGhci root = parseBuildPath root parseLibGhciFilename - Parsec.<?> "build path for a ghci library" - -- | Parse a path to a dynamic library to be built, making sure the path starts -- with the given build root. parseBuildLibDyn :: FilePath -> String -> Parsec.Parsec String () (BuildPath LibDyn) @@ -324,16 +287,6 @@ parseLibAFilename = do _ <- Parsec.string ".a" return (LibA pkgname pkgver pkghash way) --- | Parse the filename of a ghci library to be built into a 'LibGhci' value. -parseLibGhciFilename :: Parsec.Parsec String () LibGhci -parseLibGhciFilename = do - _ <- Parsec.string "HS" - (pkgname, pkgver, pkghash) <- parsePkgId - _ <- Parsec.string "." - way <- parseWayPrefix vanilla - _ <- Parsec.string "o" - return (LibGhci pkgname pkgver pkghash way) - -- | Parse the filename of a dynamic library to be built into a 'LibDyn' value. parseLibDynFilename :: String -> Parsec.Parsec String () LibDyn parseLibDynFilename ext = do ===================================== hadrian/src/Rules/Register.hs ===================================== @@ -6,20 +6,17 @@ module Rules.Register ( import Base import Context -import Expression ( getContextData ) import Flavour import Oracles.Setting import Hadrian.BuildPath import Hadrian.Expression import Hadrian.Haskell.Cabal -import Oracles.Flag (platformSupportsGhciObjects) import Packages import Rules.Rts import Settings import Target import Utilities -import Hadrian.Haskell.Cabal.Type import qualified Text.Parsec as Parsec import qualified Data.Set as Set import qualified Data.Char as Char @@ -298,17 +295,9 @@ extraTargets context -- | Given a library 'Package' this action computes all of its targets. Needing -- all the targets should build the library such that it is ready to be -- registered into the package database. --- See 'Rules.packageTargets' for the explanation of the @includeGhciLib@ --- parameter. -libraryTargets :: Bool -> Context -> Action [FilePath] -libraryTargets includeGhciLib context@Context {..} = do +libraryTargets :: Context -> Action [FilePath] +libraryTargets context = do libFile <- pkgLibraryFile context - ghciLib <- pkgGhciLibraryFile context - ghciObjsSupported <- platformSupportsGhciObjects - ghci <- if ghciObjsSupported && includeGhciLib && not (wayUnit Dynamic way) - then interpretInContext context $ getContextData buildGhciLib - else return False extra <- extraTargets context return $ [ libFile ] - ++ [ ghciLib | ghci ] ++ extra ===================================== hadrian/src/Settings/Builders/Cabal.hs ===================================== @@ -5,13 +5,12 @@ import Hadrian.Haskell.Cabal import Builder import Context -import Flavour import Packages import Settings.Builders.Common import qualified Settings.Builders.Common as S import Control.Exception (assert) import qualified Data.Set as Set -import Settings.Program (programContext, ghcWithInterpreter) +import Settings.Program (programContext) import GHC.Toolchain (ccLinkProgram, tgtCCompilerLink) import GHC.Toolchain.Program (prgFlags) @@ -128,7 +127,6 @@ commonCabalArgs stage = do ] -- TODO: Isn't vanilla always built? If yes, some conditions are redundant. --- TODO: Need compiler_stage1_CONFIGURE_OPTS += --disable-library-for-ghci? -- TODO: should `elem` be `wayUnit`? -- This approach still doesn't work. Previously libraries were build only in the -- Default flavours and not using context. @@ -136,11 +134,6 @@ libraryArgs :: Args libraryArgs = do flavourWays <- getLibraryWays contextWay <- getWay - package <- getPackage - stage <- getStage - withGhci <- expr $ ghcWithInterpreter stage - dynPrograms <- expr (flavour >>= dynamicGhcPrograms) - ghciObjsSupported <- expr platformSupportsGhciObjects let ways = Set.insert contextWay flavourWays hasVanilla = vanilla `elem` ways hasProfiling = any (wayUnit Profiling) ways @@ -155,11 +148,7 @@ libraryArgs = do , if hasProfilingShared then "--enable-profiling-shared" else "--disable-profiling-shared" - , if ghciObjsSupported && - (hasVanilla || hasProfiling) && - package /= rts && withGhci && not dynPrograms - then "--enable-library-for-ghci" - else "--disable-library-for-ghci" + , "--disable-library-for-ghci" , if hasDynamic then "--enable-shared" else "--disable-shared" ] ===================================== hadrian/src/Settings/Builders/MergeObjects.hs deleted ===================================== @@ -1,11 +0,0 @@ -module Settings.Builders.MergeObjects (mergeObjectsBuilderArgs) where - -import Settings.Builders.Common -import GHC.Toolchain -import GHC.Toolchain.Program - -mergeObjectsBuilderArgs :: Args -mergeObjectsBuilderArgs = builder MergeObjects ? mconcat - [ maybe [] (prgFlags . mergeObjsProgram) . tgtMergeObjs <$> getStagedTarget - , arg "-o", arg =<< getOutput - , getInputs ] ===================================== hadrian/src/Settings/Builders/SplitSections.hs ===================================== @@ -32,6 +32,5 @@ splitSectionsArgs = do , builder (Ghc CompileCWithGhc) ? arg "-fsplit-sections" , builder (Ghc CompileCppWithGhc) ? arg "-fsplit-sections" , builder (Cc CompileC) ? arg "-ffunction-sections" <> arg "-fdata-sections" - , builder MergeObjects ? pure ["-T", "driver/utils/merge_sections.ld"] ] ) else mempty ===================================== hadrian/src/Settings/Default.hs ===================================== @@ -40,7 +40,6 @@ import Settings.Builders.HsCpp import Settings.Builders.Ar import Settings.Builders.Ld import Settings.Builders.Make -import Settings.Builders.MergeObjects import Settings.Builders.SplitSections import Settings.Builders.RunTest import Settings.Builders.Xelatex @@ -328,7 +327,6 @@ defaultBuilderArgs = mconcat , ldBuilderArgs , arBuilderArgs , makeBuilderArgs - , mergeObjectsBuilderArgs , runTestBuilderArgs , validateBuilderArgs , xelatexBuilderArgs ===================================== hadrian/src/Settings/Packages.hs ===================================== @@ -75,8 +75,7 @@ packageArgs = do pure ["-O0"] ] , builder (Cabal Setup) ? mconcat - [ arg "--disable-library-for-ghci" - , anyTargetOs [OSOpenBSD] ? arg "--ld-options=-E" + [ anyTargetOs [OSOpenBSD] ? arg "--ld-options=-E" , compilerStageOption ghcProfiled ? arg "--ghc-pkg-option=--force" , cabalExtraDirs libzstdIncludeDir libzstdLibraryDir ] View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/8c4b70c336930d3a2e51608eb300d67… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/8c4b70c336930d3a2e51608eb300d67… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/terrorjack/asan] 3 commits: hadrian: add support for building with AddressSanitizer
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed to branch wip/terrorjack/asan at Glasgow Haskell Compiler / GHC Commits: 70d366c7 by Cheng Shao at 2025-12-17T00:39:47+01:00 hadrian: add support for building with AddressSanitizer This patch adds a +asan flavour transformer to hadrian to build all stage1+ C/C++ code with AddressBehaviorSanitizer. This is particularly useful to catch potential out-of-bounds and use-after-free bugs in the RTS codebase. - - - - - eff6cc25 by Cheng Shao at 2025-12-17T00:39:51+01:00 ci: add ubsan+asan job We now have a `x86_64-linux-fedora43-validate+debug_info+ubsan+asan` validate/nightly job with both UBSan/ASan enabled. - - - - - d43effd3 by Cheng Shao at 2025-12-17T00:39:51+01:00 rts: add ASAN poisoning to mblock allocator - - - - - 12 changed files: - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - hadrian/doc/flavours.md - hadrian/src/Flavour.hs - rts/include/Stg.h - + rts/include/rts/ASANUtils.h - rts/rts.cabal - rts/sm/MBlock.c - testsuite/driver/testglobals.py - testsuite/driver/testlib.py - testsuite/tests/rts/T18623/all.T - testsuite/tests/rts/all.T Changes: ===================================== .gitlab/generate-ci/gen_ci.hs ===================================== @@ -162,6 +162,7 @@ data BuildConfig , tablesNextToCode :: Bool , threadSanitiser :: Bool , ubsan :: Bool + , asan :: Bool , noSplitSections :: Bool , validateNonmovingGc :: Bool , textWithSIMDUTF :: Bool @@ -173,7 +174,7 @@ configureArgsStr :: BuildConfig -> String configureArgsStr bc = unwords $ ["--enable-unregisterised"| unregisterised bc ] ++ ["--disable-tables-next-to-code" | not (tablesNextToCode bc) ] - ++ ["--with-intree-gmp" | Just _ <- pure (crossTarget bc) ] + ++ ["--with-intree-gmp" | isJust (crossTarget bc) || ubsan bc || asan bc ] ++ ["--with-system-libffi" | crossTarget bc == Just "wasm32-wasi" ] ++ ["--enable-ipe-data-compression" | withZstd bc ] ++ ["--enable-strict-ghc-toolchain-check"] @@ -188,6 +189,7 @@ mkJobFlavour BuildConfig{..} = Flavour buildFlavour opts [HostFullyStatic | hostFullyStatic] ++ [ThreadSanitiser | threadSanitiser] ++ [UBSan | ubsan] ++ + [ASan | asan] ++ [NoSplitSections | noSplitSections, buildFlavour == Release ] ++ [BootNonmovingGc | validateNonmovingGc ] ++ [TextWithSIMDUTF | textWithSIMDUTF] @@ -201,6 +203,7 @@ data FlavourTrans = | HostFullyStatic | ThreadSanitiser | UBSan + | ASan | NoSplitSections | BootNonmovingGc | TextWithSIMDUTF @@ -230,6 +233,7 @@ vanilla = BuildConfig , tablesNextToCode = True , threadSanitiser = False , ubsan = False + , asan = False , noSplitSections = False , validateNonmovingGc = False , textWithSIMDUTF = False @@ -283,8 +287,8 @@ llvm = vanilla { llvmBootstrap = True } tsan :: BuildConfig tsan = vanilla { threadSanitiser = True } -enableUBSan :: BuildConfig -enableUBSan = vanilla { withDwarf = True, ubsan = True } +enableUBSanASan :: BuildConfig +enableUBSanASan = vanilla { withDwarf = True, ubsan = True, asan = True } noTntc :: BuildConfig noTntc = vanilla { tablesNextToCode = False } @@ -381,6 +385,7 @@ flavourString (Flavour base trans) = base_string base ++ concatMap (("+" ++) . f flavour_string HostFullyStatic = "host_fully_static" flavour_string ThreadSanitiser = "thread_sanitizer_cmm" flavour_string UBSan = "ubsan" + flavour_string ASan = "asan" flavour_string NoSplitSections = "no_split_sections" flavour_string BootNonmovingGc = "boot_nonmoving_gc" flavour_string TextWithSIMDUTF = "text_simdutf" @@ -1213,15 +1218,24 @@ fedora_x86 = , hackage_doc_job (disableValidate (standardBuildsWithConfig Amd64 (Linux Fedora43) releaseConfig)) , disableValidate (standardBuildsWithConfig Amd64 (Linux Fedora43) dwarf) , disableValidate (standardBuilds Amd64 (Linux Fedora43)) - -- For UBSan jobs, only enable for validate/nightly pipelines. - -- Also disable docs since it's not the point for UBSan jobs. + -- For UBSan/ASan jobs, only enable for validate/nightly + -- pipelines. Also disable docs since it's not the point for + -- UBSan/ASan jobs. + -- + -- See + -- https://github.com/llvm/llvm-project/blob/llvmorg-21.1.8/compiler-rt/lib/sa… + -- for ASAN options help, for now these are required to pass the + -- testsuite , modifyJobs ( setVariable "HADRIAN_ARGS" "--docs=none" . addVariable "UBSAN_OPTIONS" "suppressions=$CI_PROJECT_DIR/rts/.ubsan-suppressions" + . addVariable + "ASAN_OPTIONS" + "detect_leaks=false:handle_segv=0:handle_sigfpe=0:verify_asan_link_order=false" ) - $ validateBuilds Amd64 (Linux Fedora43) enableUBSan + $ validateBuilds Amd64 (Linux Fedora43) enableUBSanASan ] where hackage_doc_job = rename (<> "-hackage") . modifyJobs (addVariable "HADRIAN_ARGS" "--haddock-for-hackage") ===================================== .gitlab/jobs.yaml ===================================== @@ -3195,7 +3195,7 @@ "XZ_OPT": "-9" } }, - "nightly-x86_64-linux-fedora43-validate+debug_info+ubsan": { + "nightly-x86_64-linux-fedora43-validate+debug_info+ubsan+asan": { "after_script": [ ".gitlab/ci.sh save_cache", ".gitlab/ci.sh save_test_output", @@ -3206,7 +3206,7 @@ "artifacts": { "expire_in": "8 weeks", "paths": [ - "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan.tar.xz", + "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan+asan.tar.xz", "junit.xml", "unexpected-test-output.tar.gz" ], @@ -3248,14 +3248,15 @@ "x86_64-linux" ], "variables": { + "ASAN_OPTIONS": "detect_leaks=false:handle_segv=0:handle_sigfpe=0:verify_asan_link_order=false", "BIGNUM_BACKEND": "gmp", - "BIN_DIST_NAME": "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan", - "BUILD_FLAVOUR": "validate+debug_info+ubsan", - "CONFIGURE_ARGS": "--enable-strict-ghc-toolchain-check", + "BIN_DIST_NAME": "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan+asan", + "BUILD_FLAVOUR": "validate+debug_info+ubsan+asan", + "CONFIGURE_ARGS": "--with-intree-gmp --enable-strict-ghc-toolchain-check", "HADRIAN_ARGS": "--docs=none", "INSTALL_CONFIGURE_ARGS": "--enable-strict-ghc-toolchain-check", "RUNTEST_ARGS": "", - "TEST_ENV": "x86_64-linux-fedora43-validate+debug_info+ubsan", + "TEST_ENV": "x86_64-linux-fedora43-validate+debug_info+ubsan+asan", "UBSAN_OPTIONS": "suppressions=$CI_PROJECT_DIR/rts/.ubsan-suppressions", "XZ_OPT": "-9" } @@ -7346,7 +7347,7 @@ "TEST_ENV": "x86_64-linux-fedora43-validate+debug_info" } }, - "x86_64-linux-fedora43-validate+debug_info+ubsan": { + "x86_64-linux-fedora43-validate+debug_info+ubsan+asan": { "after_script": [ ".gitlab/ci.sh save_cache", ".gitlab/ci.sh save_test_output", @@ -7357,7 +7358,7 @@ "artifacts": { "expire_in": "2 weeks", "paths": [ - "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan.tar.xz", + "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan+asan.tar.xz", "junit.xml", "unexpected-test-output.tar.gz" ], @@ -7383,7 +7384,7 @@ ], "rules": [ { - "if": "((($ONLY_JOBS) && ($ONLY_JOBS =~ /.*\\bx86_64-linux-fedora43-validate\\+debug_info\\+ubsan(\\s|$).*/)) || (($ONLY_JOBS == null) && ((($CI_MERGE_REQUEST_LABELS =~ /.*full-ci.*/) || ($CI_MERGE_REQUEST_LABELS =~ /.*marge_bot_batch_merge_job.*/) || ($CI_COMMIT_BRANCH == \"master\") || ($CI_COMMIT_BRANCH =~ /ghc-[0-9]+\\.[0-9]+/))))) && ($RELEASE_JOB != \"yes\") && ($NIGHTLY == null)", + "if": "((($ONLY_JOBS) && ($ONLY_JOBS =~ /.*\\bx86_64-linux-fedora43-validate\\+debug_info\\+ubsan\\+asan(\\s|$).*/)) || (($ONLY_JOBS == null) && ((($CI_MERGE_REQUEST_LABELS =~ /.*full-ci.*/) || ($CI_MERGE_REQUEST_LABELS =~ /.*marge_bot_batch_merge_job.*/) || ($CI_COMMIT_BRANCH == \"master\") || ($CI_COMMIT_BRANCH =~ /ghc-[0-9]+\\.[0-9]+/))))) && ($RELEASE_JOB != \"yes\") && ($NIGHTLY == null)", "when": "on_success" } ], @@ -7399,14 +7400,15 @@ "x86_64-linux" ], "variables": { + "ASAN_OPTIONS": "detect_leaks=false:handle_segv=0:handle_sigfpe=0:verify_asan_link_order=false", "BIGNUM_BACKEND": "gmp", - "BIN_DIST_NAME": "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan", - "BUILD_FLAVOUR": "validate+debug_info+ubsan", - "CONFIGURE_ARGS": "--enable-strict-ghc-toolchain-check", + "BIN_DIST_NAME": "ghc-x86_64-linux-fedora43-validate+debug_info+ubsan+asan", + "BUILD_FLAVOUR": "validate+debug_info+ubsan+asan", + "CONFIGURE_ARGS": "--with-intree-gmp --enable-strict-ghc-toolchain-check", "HADRIAN_ARGS": "--docs=none", "INSTALL_CONFIGURE_ARGS": "--enable-strict-ghc-toolchain-check", "RUNTEST_ARGS": "", - "TEST_ENV": "x86_64-linux-fedora43-validate+debug_info+ubsan", + "TEST_ENV": "x86_64-linux-fedora43-validate+debug_info+ubsan+asan", "UBSAN_OPTIONS": "suppressions=$CI_PROJECT_DIR/rts/.ubsan-suppressions" } }, ===================================== hadrian/doc/flavours.md ===================================== @@ -242,6 +242,10 @@ The supported transformers are listed below: <td><code>ubsan</code></td> <td>Build all stage1+ C/C++ code with UndefinedBehaviorSanitizer support</td> </tr> + <tr> + <td><code>asan</code></td> + <td>Build all stage1+ C/C++ code with AddressSanitizer support</td> + </tr> <tr> <td><code>llvm</code></td> <td>Use GHC's LLVM backend (`-fllvm`) for all stage1+ compilation.</td> ===================================== hadrian/src/Flavour.hs ===================================== @@ -8,6 +8,7 @@ module Flavour , splitSections , enableThreadSanitizer , enableUBSan + , enableASan , enableLateCCS , enableHashUnitIds , enableDebugInfo, enableTickyGhc @@ -56,6 +57,7 @@ flavourTransformers = M.fromList , "thread_sanitizer" =: enableThreadSanitizer False , "thread_sanitizer_cmm" =: enableThreadSanitizer True , "ubsan" =: enableUBSan + , "asan" =: enableASan , "llvm" =: viaLlvmBackend , "profiled_ghc" =: enableProfiledGhc , "no_dynamic_ghc" =: disableDynamicGhcPrograms @@ -303,6 +305,28 @@ enableUBSan = builder Testsuite ? arg "--config=have_ubsan=True" ] +-- | Build all stage1+ C/C++ code with AddressSanitizer support: +-- https://clang.llvm.org/docs/AddressSanitizer.html +enableASan :: Flavour -> Flavour +enableASan = + addArgs $ + notStage0 + ? mconcat + [ package rts + ? builder (Cabal Flags) + ? arg "+asan" + <> (needSharedLibSAN ? arg "+shared-libsan"), + builder (Ghc CompileHs) ? arg "-optc-fsanitize=address", + builder (Ghc CompileCWithGhc) ? arg "-optc-fsanitize=address", + builder (Ghc CompileCppWithGhc) ? arg "-optcxx-fsanitize=address", + builder (Ghc LinkHs) + ? arg "-optc-fsanitize=address" + <> arg "-optl-fsanitize=address" + <> (needSharedLibSAN ? arg "-optl-shared-libsan"), + builder (Cc CompileC) ? arg "-fsanitize=address", + builder Testsuite ? arg "--config=have_asan=True" + ] + -- | Use the LLVM backend in stages 1 and later. viaLlvmBackend :: Flavour -> Flavour viaLlvmBackend = addArgs $ notStage0 ? builder Ghc ? arg "-fllvm" ===================================== rts/include/Stg.h ===================================== @@ -335,6 +335,7 @@ external prototype return neither of these types to workaround #11395. #include "stg/MachRegsForHost.h" #include "stg/Regs.h" #include "stg/Ticky.h" +#include "rts/ASANUtils.h" #include "rts/TSANUtils.h" #if IN_STG_CODE ===================================== rts/include/rts/ASANUtils.h ===================================== @@ -0,0 +1,33 @@ +#pragma once + +#if defined(__SANITIZE_ADDRESS__) +#define ASAN_ENABLED +#elif defined(__has_feature) +#if __has_feature(address_sanitizer) +#define ASAN_ENABLED +#endif +#endif + +#if defined(ASAN_ENABLED) +#include <sanitizer/asan_interface.h> +#define USED_IF_ASAN +#else +#include <stdlib.h> +#define USED_IF_ASAN __attribute__((unused)) +#endif + +static inline void +__ghc_asan_poison_memory_region(void const volatile *addr USED_IF_ASAN, + size_t size USED_IF_ASAN) { +#if defined(ASAN_ENABLED) + __asan_poison_memory_region(addr, size); +#endif +} + +static inline void +__ghc_asan_unpoison_memory_region(void const volatile *addr USED_IF_ASAN, + size_t size USED_IF_ASAN) { +#if defined(ASAN_ENABLED) + __asan_unpoison_memory_region(addr, size); +#endif +} ===================================== rts/rts.cabal ===================================== @@ -97,6 +97,12 @@ flag ubsan UndefinedBehaviorSanitizer. default: False manual: True +flag asan + description: + Link with -fsanitize=address, to be enabled when building with + AddressSanitizer. + default: False + manual: True flag shared-libsan description: Link with -shared-libsan, to guarantee only one copy of the @@ -216,6 +222,9 @@ library if flag(ubsan) ld-options: -fsanitize=undefined + if flag(asan) + ld-options: -fsanitize=address + if flag(shared-libsan) ld-options: -shared-libsan @@ -280,6 +289,7 @@ library -- ^ generated rts/ghc_ffi.h rts/Adjustor.h + rts/ASANUtils.h rts/ExecPage.h rts/BlockSignals.h rts/Bytecodes.h ===================================== rts/sm/MBlock.c ===================================== @@ -579,6 +579,8 @@ getMBlocks(uint32_t n) ret = getCommittedMBlocks(n); + __ghc_asan_unpoison_memory_region(ret, (W_)n * MBLOCK_SIZE); + debugTrace(DEBUG_gc, "allocated %d megablock(s) at %p",n,ret); mblocks_allocated += n; @@ -611,6 +613,8 @@ freeMBlocks(void *addr, uint32_t n) mblocks_allocated -= n; + __ghc_asan_poison_memory_region(addr, (W_)n * MBLOCK_SIZE); + decommitMBlocks(addr, n); } ===================================== testsuite/driver/testglobals.py ===================================== @@ -189,6 +189,9 @@ class TestConfig: # Are we running with UndefinedBehaviorSanitizer enabled? self.have_ubsan = False + # Are we running with AddressSanitizer enabled? + self.have_asan = False + # Do symbols use leading underscores? self.leading_underscore = False ===================================== testsuite/driver/testlib.py ===================================== @@ -1093,6 +1093,9 @@ def have_thread_sanitizer( ) -> bool: def have_ubsan( ) -> bool: return config.have_ubsan +def have_asan( ) -> bool: + return config.have_asan + def gcc_as_cmmp() -> bool: return config.cmm_cpp_is_gcc ===================================== testsuite/tests/rts/T18623/all.T ===================================== @@ -8,6 +8,8 @@ test('T18623', # Recent versions of osx report an error when running `ulimit -v` when(opsys('darwin'), skip), when(arch('powerpc64le'), skip), + # ASan can't allocate shadow memory + when(have_asan(), skip), cmd_prefix('ulimit -v ' + str(8 * 1024 ** 2) + ' && '), ignore_stdout], run_command, ===================================== testsuite/tests/rts/all.T ===================================== @@ -105,6 +105,8 @@ def remove_parenthesis(s): return re.sub(r'\s+$[^)]*$', '', s) test('outofmem', [ when(opsys('darwin'), skip), + # ASan shadow memory allocation blows up + when(have_asan(), skip), # this is believed to cause other processes to die # that happen concurrently while the outofmem test # runs in CI. As such we'll need to disable it on View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/02adcf979d688e37ae3976a5766ba7… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/02adcf979d688e37ae3976a5766ba7… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/fix-26670] A very untidy, partial reorganization [DOES NOT COMPILE]
by recursion-ninja (＠recursion-ninja) 17 Dec '25

17 Dec '25

recursion-ninja pushed to branch wip/fix-26670 at Glasgow Haskell Compiler / GHC Commits: 205ea46a by Recursion Ninja at 2025-12-16T18:19:02-05:00 A very untidy, partial reorganization [DOES NOT COMPILE] - - - - - 35 changed files: - compiler/GHC/Builtin/PrimOps/Ids.hs - compiler/GHC/Core/Lint.hs - compiler/GHC/Core/Opt/CSE.hs - compiler/GHC/Core/Opt/CprAnal.hs - compiler/GHC/Core/Opt/DmdAnal.hs - compiler/GHC/Core/Opt/Simplify.hs - compiler/GHC/Core/Opt/Simplify/Iteration.hs - compiler/GHC/Core/Opt/Simplify/Utils.hs - compiler/GHC/Core/Opt/Specialise.hs - compiler/GHC/Core/Opt/WorkWrap.hs - compiler/GHC/Core/Ppr.hs - compiler/GHC/Core/Unfold/Make.hs - compiler/GHC/CoreToIface.hs - compiler/GHC/Hs/Binds.hs - compiler/GHC/Hs/Decls.hs - compiler/GHC/Hs/Instances.hs - compiler/GHC/HsToCore/Binds.hs - compiler/GHC/Iface/Syntax.hs - compiler/GHC/Iface/Tidy.hs - compiler/GHC/IfaceToCore.hs - compiler/GHC/Parser/Lexer.x - compiler/GHC/Parser/PostProcess.hs - compiler/GHC/Rename/Bind.hs - compiler/GHC/Tc/Errors/Types.hs - compiler/GHC/Tc/Gen/Sig.hs - compiler/GHC/Tc/Instance/Typeable.hs - compiler/GHC/ThToHs.hs - compiler/GHC/Types/Basic.hs - compiler/GHC/Types/Id.hs - compiler/GHC/Types/Id/Info.hs - compiler/GHC/Types/Id/Make.hs - + compiler/GHC/Types/InlinePragma.hs - compiler/Language/Haskell/Syntax/Binds.hs - compiler/Language/Haskell/Syntax/Extension.hs - compiler/ghc.cabal.in The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/205ea46a04357a7e8fb400941c55d6a… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/205ea46a04357a7e8fb400941c55d6a… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/terrorjack/asan] 11 commits: Bump exceptions submodule to 0.10.11
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed to branch wip/terrorjack/asan at Glasgow Haskell Compiler / GHC Commits: 3b5aecb5 by Ben Gamari at 2025-12-13T23:43:10+01:00 Bump exceptions submodule to 0.10.11 - - - - - c32de3b0 by Johan Förberg at 2025-12-15T02:36:03-05:00 base: Define Semigroup and Monoid instances for lazy ST CLC proposal: https://github.com/haskell/core-libraries-committee/issues/374 Fixes #26581 - - - - - 4f8b660c by mangoiv at 2025-12-15T02:37:05-05:00 ci: do not require nightly cabal-reinstall job to succeed - - - - - 2c2a3ef3 by Cheng Shao at 2025-12-15T11:51:53-05:00 docs: drop obsolete warning about -fexternal-interpreter on windows This patch drops an obsolete warning about -fexternal-interpreter not supported on windows; it is supported since a long time ago, including the profiled way. - - - - - 68573aa5 by Marc Scholten at 2025-12-15T11:53:00-05:00 haddock: Drop Haddock.Backends.HaddockDB as it's unused - - - - - b230d549 by mangoiv at 2025-12-16T15:17:45-05:00 base: generalize delete{Firsts,}By When we delete{Firsts,}By we should not require the lists to be the same type. This is an especially useful generalisation in the case of deleteFirstsBy because we can skip an invocation of the map function. This change was discussed on the core-libraries-committee's bug tracker at https://github.com/haskell/core-libraries-committee/issues/372. - - - - - 6a2b43e3 by Cheng Shao at 2025-12-16T15:18:30-05:00 compiler: clean up redundant LANGUAGE pragmas This patch bumps `default-language` of `ghc`/`ghc-bin` from `GHC2021` to `GHC2024` (which is supported in ghc 9.10, current boot ghc lower version bound), and also cleans up redundant `LANGUAGE` pragmas (as well as `default-extensions`/`other-extensions`) that are already implied by `GHC2024`. Co-authored-by: Codex <codex(a)openai.com> - - - - - f0549b81 by Cheng Shao at 2025-12-17T00:00:24+01:00 rts: add is-valid-utf8.c to .ubsan-suppressions A minor one in `bytestring` that might surface when building with +ubsan using clang. - - - - - 5926fe44 by Cheng Shao at 2025-12-17T00:01:12+01:00 hadrian: add support for building with AddressSanitizer This patch adds a +asan flavour transformer to hadrian to build all stage1+ C/C++ code with AddressBehaviorSanitizer. This is particularly useful to catch potential out-of-bounds and use-after-free bugs in the RTS codebase. - - - - - 77a5fd34 by Cheng Shao at 2025-12-17T00:01:31+01:00 ci: add ubsan+asan job We now have a `x86_64-linux-fedora43-validate+debug_info+ubsan+asan` validate/nightly job with both UBSan/ASan enabled. - - - - - 02adcf97 by Cheng Shao at 2025-12-17T00:01:31+01:00 rts: add ASAN poisoning to mblock allocator - - - - - 460 changed files: - .gitlab-ci.yml - .gitlab/generate-ci/gen_ci.hs - .gitlab/jobs.yaml - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/PrimOps/Ids.hs - compiler/GHC/Builtin/Types/Literals.hs - 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/Types.hs - compiler/GHC/Cmm.hs - compiler/GHC/Cmm/BlockId.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/Cmm/CommonBlockElim.hs - compiler/GHC/Cmm/Config.hs - compiler/GHC/Cmm/ContFlowOpt.hs - compiler/GHC/Cmm/Dataflow.hs - compiler/GHC/Cmm/Dataflow/Block.hs - compiler/GHC/Cmm/Dataflow/Graph.hs - compiler/GHC/Cmm/Dataflow/Label.hs - compiler/GHC/Cmm/DebugBlock.hs - compiler/GHC/Cmm/Dominators.hs - compiler/GHC/Cmm/Expr.hs - compiler/GHC/Cmm/Graph.hs - compiler/GHC/Cmm/Info/Build.hs - compiler/GHC/Cmm/LRegSet.hs - compiler/GHC/Cmm/LayoutStack.hs - compiler/GHC/Cmm/Lint.hs - compiler/GHC/Cmm/Liveness.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/Cmm/ProcPoint.hs - compiler/GHC/Cmm/Reducibility.hs - compiler/GHC/Cmm/Reg.hs - compiler/GHC/Cmm/Sink.hs - compiler/GHC/Cmm/Switch.hs - compiler/GHC/Cmm/Switch/Implement.hs - compiler/GHC/Cmm/ThreadSanitizer.hs - compiler/GHC/Cmm/UniqueRenamer.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/BlockLayout.hs - compiler/GHC/CmmToAsm/CFG.hs - compiler/GHC/CmmToAsm/CPrim.hs - compiler/GHC/CmmToAsm/Dwarf/Types.hs - compiler/GHC/CmmToAsm/Format.hs - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/Monad.hs - compiler/GHC/CmmToAsm/PPC/CodeGen.hs - compiler/GHC/CmmToAsm/PPC/Ppr.hs - compiler/GHC/CmmToAsm/RV64/CodeGen.hs - compiler/GHC/CmmToAsm/RV64/Ppr.hs - compiler/GHC/CmmToAsm/Reg/Graph.hs - compiler/GHC/CmmToAsm/Reg/Graph/SpillClean.hs - compiler/GHC/CmmToAsm/Reg/Graph/SpillCost.hs - compiler/GHC/CmmToAsm/Reg/Linear/State.hs - compiler/GHC/CmmToAsm/Reg/Linear/X86.hs - compiler/GHC/CmmToAsm/Reg/Linear/X86_64.hs - compiler/GHC/CmmToAsm/Wasm.hs - compiler/GHC/CmmToAsm/Wasm/Asm.hs - compiler/GHC/CmmToAsm/Wasm/FromCmm.hs - compiler/GHC/CmmToAsm/Wasm/Types.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/Core/Coercion.hs - compiler/GHC/Core/Coercion.hs-boot - compiler/GHC/Core/Coercion/Axiom.hs - compiler/GHC/Core/DataCon.hs - compiler/GHC/Core/FamInstEnv.hs - 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ghc/Main.hs - ghc/ghc-bin.cabal.in - hadrian/doc/flavours.md - hadrian/src/Flavour.hs - libraries/base/changelog.md - libraries/exceptions - libraries/ghc-internal/src/GHC/Internal/Control/Monad/ST/Lazy/Imp.hs - libraries/ghc-internal/src/GHC/Internal/Data/OldList.hs - rts/.ubsan-suppressions - rts/include/Stg.h - + rts/include/rts/ASANUtils.h - rts/rts.cabal - rts/sm/MBlock.c - testsuite/driver/testglobals.py - testsuite/driver/testlib.py - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/rts/T18623/all.T - utils/haddock/haddock-api/haddock-api.cabal - − utils/haddock/haddock-api/src/Haddock/Backends/HaddockDB.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/16675f7dad2171e83f04af506aa867… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/16675f7dad2171e83f04af506aa867… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/hadrian-no-ghci-lib
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed new branch wip/hadrian-no-ghci-lib at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/hadrian-no-ghci-lib You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Deleted branch wip/windows-no-linker-script
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao deleted branch wip/windows-no-linker-script at Glasgow Haskell Compiler / GHC -- You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc][wip/marge_bot_batch_merge_job] 12 commits: base: generalize delete{Firsts,}By
by Marge Bot (＠marge-bot) 17 Dec '25

17 Dec '25

Marge Bot pushed to branch wip/marge_bot_batch_merge_job at Glasgow Haskell Compiler / GHC Commits: b230d549 by mangoiv at 2025-12-16T15:17:45-05:00 base: generalize delete{Firsts,}By When we delete{Firsts,}By we should not require the lists to be the same type. This is an especially useful generalisation in the case of deleteFirstsBy because we can skip an invocation of the map function. This change was discussed on the core-libraries-committee's bug tracker at https://github.com/haskell/core-libraries-committee/issues/372. - - - - - 6a2b43e3 by Cheng Shao at 2025-12-16T15:18:30-05:00 compiler: clean up redundant LANGUAGE pragmas This patch bumps `default-language` of `ghc`/`ghc-bin` from `GHC2021` to `GHC2024` (which is supported in ghc 9.10, current boot ghc lower version bound), and also cleans up redundant `LANGUAGE` pragmas (as well as `default-extensions`/`other-extensions`) that are already implied by `GHC2024`. Co-authored-by: Codex <codex(a)openai.com> - - - - - 4241aefd by sheaf at 2025-12-16T15:50:37-05:00 X86 CodeGen: fix assign_eax_sse_regs We must set %al to the number of SSE2 registers that contain arguments (in case we are dealing with a varargs function). The logic for counting how many arguments reside in SSE2 registers was incorrect, as it used 'isFloatFormat', which incorrectly ignores vector registers. We now instead do case analysis on the register class: is_sse_reg r = case targetClassOfReg platform r of RcFloatOrVector -> True RcInteger -> False This change is necessary to prevent segfaults in T20030_test1j, because subsequent commits change the format calculations, resulting in vector formats more often. - - - - - 8deb0847 by sheaf at 2025-12-16T15:50:37-05:00 X86 regUsageOfInstr: fix format for IMUL When used with 8-bit operands, the IMUL instruction returns the result in the lower 16 bits of %rax (also known as %ax). This is different than for the other sizes, where an input at 16, 32 or 64 bits will result in 16, 32 or 64 bits of output in both %rax and %rdx. This doesn't affect the behaviour of the compiler, because we don't allow partial writes at sub-word sizes. The rationale is explained in Wrinkle [Don't allow scalar partial writes] in Note [Register formats in liveness analysis], in GHC.CmmToAsm.Reg.Liveness. - - - - - 3012fcb9 by sheaf at 2025-12-16T15:50:37-05:00 Liveness analysis: consider register formats This commit updates the register allocator to be a bit more careful in situations in which a single register is used at multiple different formats, e.g. when xmm1 is used both to store a Double# and a DoubleX2#. This is done by introducing the 'Regs' newtype around 'UniqSet RegWithFormat', for which the combining operations take the larger of the two formats instead of overriding the format. Operations on 'Regs' are defined in 'GHC.CmmToAsm.Reg.Regs'. There is a modest compile-time cost for the additional overhead for tracking register formats, which causes the metric increases of this commit. The subtle aspects of the implementation are outlined in Note [Register formats in liveness analysis] in GHC.CmmToAsm.Reg.Liveness. Fixes #26411 #26611 ------------------------- Metric Increase: T12707 T26425 T3294 ------------------------- - - - - - bace1724 by sheaf at 2025-12-16T15:50:37-05:00 Register allocator: reload at same format as spill This commit ensures that if we spill a register onto the stack at a given format, we then always reload the register at this same format. This ensures we don't end up in a situation where we spill F64x2 but end up only reloading the lower F64. This first reload would make us believe the whole data is in a register, thus silently losing the upper 64 bits of the spilled register's contents. Fixes #26526 - - - - - db8e779c by sheaf at 2025-12-16T15:50:37-05:00 Register allocation: writes redefine format As explained in Note [Allocated register formats] in GHC.CmmToAsm.Reg.Linear, we consider all writes to redefine the format of the register. This ensures that in a situation such as movsd .Ln6m(%rip),%v1 shufpd $0,%v1,%v1 we properly consider the broadcast operation to change the format of %v1 from F64 to F64x2. This completes the fix to #26411 (test in T26411b). - - - - - 6be8f774 by Vladislav Zavialov at 2025-12-16T15:50:38-05:00 Parser: improve mkModuleImpExp, remove checkImportSpec 1. The `mkModuleImpExp` helper now knows whether it is processing an import or export list item, and uses this information to produce a more accurate error message for `import M (T(..,x))` with PatternSynonyms disabled. The old message incorrectly referred to this case as an export form. 2. The `checkImportSpec` helper is removed in favor of more comprehensive error checking in `mkModuleImpExp`. 3. Additionaly, the invariants of `ImpExpList` and `ImpExpAllWith` have been made more explicit in the comments and assertions (calls to 'panic'). Test case: import-syntax-no-ext - - - - - 639f01aa by Vladislav Zavialov at 2025-12-16T15:50:38-05:00 Subordinate namespace-specified wildcards (#25901) Add support for subordinate namespace-specified wildcards `X(type ..)` and `X(data ..)` to import and export lists. Examples: import M (Cls(type ..)) -- imports Cls and all its associated types import M (Cls(data ..)) -- imports Cls and all its methods module M (R(data ..), C(type ..)) where -- exports R and all its data constructors and record fields; -- exports C and all its associated types, but not its methods The scope of this change is limited to the case where the wildcard is the only subordinate import/export item, whereas the more complex forms `X(type .., f)` or `X(type .., data ..)` are unsupported and raise the newly introduced PsErrUnsupportedExplicitNamespace error. This restriction may be lifted later. Summary of the changes: 1. Refactor IEThingAll to store its extension field XIEThingAll as a record IEThingAllExt instead of a tuple. 2. Extend the AST by adding a NamespaceSpecifier field to IEThingAllExt, representing an optional namespace specifier `type` or `data` in front of a subordinate wildcard `X(..)`. 3. Extend the grammar in Parser.y with productions for `type ..` and `data ..` in subordinate import/export items. 4. Introduce `filterByNamespaceGREs` to filter [GlobalRdrElt] by a NamespaceSpecifier; use it in `filterImports` and `exports_from_avail` to account for the namespace specifier in IEThingAll. 5. Improve diagnostics by storing more information in DodgyImportsEmptyParent and DodgyExportsEmptyParent. Test cases: T25901_sub_e T25901_sub_f T25901_sub_g T25901_sub_a T25901_sub_b T25901_sub_c T25901_sub_d T25901_sub_w DodgyImports02 DodgyImports03 DodgyImports04 - - - - - bcc45f28 by Cheng Shao at 2025-12-16T15:50:40-05:00 testsuite: improve coverage of foundation test This patch refactors the `foundation` test a bit to improve coverage: - Instead of using a hard-coded seed, a random seed is now taken from the command line, and printed upon test failure. This improves test coverage over many future CI runs, and shall a failure occur, the seed is available in the CI log for local reproduction. - The iterations count is bumped to 10000 instead of 100, similar to the bump in `test-primops`. Runtime timeout is bumped 2x just to be safe, though it's 2m39s on my machine and well within default timeout 300s. - Improve `newLCGGen` by using non-atomic loads/stores on a `MutableByteArray#` for storing mutable `Word64`, this test doesn't use parallelism in the first place - Fixed a few compiler warnings and removed redundant pragmas and imports Co-authored-by: Codex <codex(a)openai.com> - - - - - 38ec29c4 by Cheng Shao at 2025-12-16T15:50:42-05:00 rts: use __builtin_mul_overflow for hs_mulIntMayOflo This patch uses `__builtin_mul_overflow` to implement `hs_mulIntMayOflo`. This is a GNU C checked arithmetic builtin function supported by gcc/clang, is type-generic so works for both 32-bit/64-bit, and makes the code both more efficient and easier to read/maintain than the previous hand rolled logic. - - - - - f8aef01f by Cheng Shao at 2025-12-16T15:50:45-05:00 compiler/rts: fix ABI mismatch in barf() invocations This patch fixes a long-standing issue of ABI mismatch in `barf()` invocations, both in compiler-emitted code and in hand written Cmm code: - In RTS, we have `barf()` which reports a fatal internal error message and exits the program. - `barf()` is a variadic C function! When used as a callee of a foreign call with `ccall` calling convention instead of `capi`, there is an ABI mismatch between the caller and the callee! - Unfortunately, both the compiler and the Cmm sources contain many places where we call `barf()` via `ccall` convention!! Like, when you write `foreign "C" barf("foo object (%p) entered!", R1)`, it totally doesn't do what you think it'll do at all!! The second argument `R1` is not properly passed in `va_list`, and the behavior is completely undefined!! - Even more unfortunately, this issue has been sitting around long enough because the ABI mismatch is subtle enough on normie platforms like x64 and arm64. - But there are platforms like wasm32 that are stricter about ABI, and the broken `barf()` invocations already causes trouble for wasm backend: we had to use ugly hacks like `barf(errmsg, NULL)` to make `wasm-ld` happy, and even with this band-aid, compiler-generated `barf()` invocations are still broken, resulting in regressions in certain debug-related functionality, e.g. `-dtag-inference-checks` is broken on wasm32 (#22882). This patch properly fixes the issue: - We add non-variadic `barf` wrappers in the RTS that can be used as `ccall` callees - Both the compiler `emitBarf` logic and the hand-written Cmm are changed to call these wrappers - `emitBarf` now also properly annotates the foreign call as `CmmNeverReturns` to indicate it's a noreturn call to enable more efficient code generation `-dtag-inference-checks` now works on wasm. Closes #22882. Co-authored-by: Codex <codex(a)openai.com> - - - - - 510 changed files: - compiler/GHC.hs - compiler/GHC/Builtin/PrimOps.hs - compiler/GHC/Builtin/PrimOps/Ids.hs - compiler/GHC/Builtin/Types/Literals.hs - 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/Types.hs - compiler/GHC/Cmm.hs - compiler/GHC/Cmm/BlockId.hs - compiler/GHC/Cmm/CLabel.hs - compiler/GHC/Cmm/CommonBlockElim.hs - compiler/GHC/Cmm/Config.hs - compiler/GHC/Cmm/ContFlowOpt.hs - compiler/GHC/Cmm/Dataflow.hs - compiler/GHC/Cmm/Dataflow/Block.hs - compiler/GHC/Cmm/Dataflow/Graph.hs - compiler/GHC/Cmm/Dataflow/Label.hs - compiler/GHC/Cmm/DebugBlock.hs - compiler/GHC/Cmm/Dominators.hs - compiler/GHC/Cmm/Expr.hs - compiler/GHC/Cmm/Graph.hs - compiler/GHC/Cmm/Info/Build.hs - compiler/GHC/Cmm/LRegSet.hs - compiler/GHC/Cmm/LayoutStack.hs - compiler/GHC/Cmm/Lint.hs - compiler/GHC/Cmm/Liveness.hs - compiler/GHC/Cmm/MachOp.hs - compiler/GHC/Cmm/Node.hs - compiler/GHC/Cmm/Parser.y - compiler/GHC/Cmm/ProcPoint.hs - compiler/GHC/Cmm/Reducibility.hs - compiler/GHC/Cmm/Reg.hs - compiler/GHC/Cmm/Sink.hs - compiler/GHC/Cmm/Switch.hs - compiler/GHC/Cmm/Switch/Implement.hs - compiler/GHC/Cmm/ThreadSanitizer.hs - compiler/GHC/Cmm/UniqueRenamer.hs - compiler/GHC/Cmm/Utils.hs - compiler/GHC/CmmToAsm/BlockLayout.hs - compiler/GHC/CmmToAsm/CFG.hs - compiler/GHC/CmmToAsm/CPrim.hs - compiler/GHC/CmmToAsm/Dwarf/Types.hs - compiler/GHC/CmmToAsm/Format.hs - compiler/GHC/CmmToAsm/LA64/CodeGen.hs - compiler/GHC/CmmToAsm/Monad.hs - compiler/GHC/CmmToAsm/PPC/CodeGen.hs - compiler/GHC/CmmToAsm/PPC/Ppr.hs - compiler/GHC/CmmToAsm/RV64/CodeGen.hs - compiler/GHC/CmmToAsm/RV64/Ppr.hs - compiler/GHC/CmmToAsm/Reg/Graph.hs - compiler/GHC/CmmToAsm/Reg/Graph/Coalesce.hs - compiler/GHC/CmmToAsm/Reg/Graph/Spill.hs - compiler/GHC/CmmToAsm/Reg/Graph/SpillClean.hs - compiler/GHC/CmmToAsm/Reg/Graph/SpillCost.hs - compiler/GHC/CmmToAsm/Reg/Linear.hs - 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rts/Exception.cmm - rts/Jumps.h - rts/PrimOps.cmm - rts/RtsMessages.c - rts/StgMiscClosures.cmm - rts/StgStartup.cmm - rts/include/Stg.h - rts/include/rts/Messages.h - rts/prim/mulIntMayOflo.c - testsuite/tests/haddock/should_compile_flag_haddock/T17544_kw.stderr - testsuite/tests/interface-stability/base-exports.stdout - testsuite/tests/interface-stability/base-exports.stdout-javascript-unknown-ghcjs - testsuite/tests/interface-stability/base-exports.stdout-mingw32 - testsuite/tests/interface-stability/base-exports.stdout-ws-32 - testsuite/tests/numeric/should_run/all.T - testsuite/tests/numeric/should_run/foundation.hs - testsuite/tests/numeric/should_run/foundation.stdout - testsuite/tests/patsyn/should_fail/all.T - + testsuite/tests/patsyn/should_fail/import-syntax-no-ext.hs - + testsuite/tests/patsyn/should_fail/import-syntax-no-ext.stderr - + testsuite/tests/rename/should_compile/T25901_sub_e.hs - + testsuite/tests/rename/should_compile/T25901_sub_f.hs - + testsuite/tests/rename/should_compile/T25901_sub_f.stderr - + testsuite/tests/rename/should_compile/T25901_sub_g.hs - + testsuite/tests/rename/should_compile/T25901_sub_g.stderr - + testsuite/tests/rename/should_compile/T25901_sub_g_helper.hs - testsuite/tests/rename/should_compile/all.T - testsuite/tests/rename/should_fail/T23570b.stderr - + testsuite/tests/rename/should_fail/T25901_sub_a.hs - + testsuite/tests/rename/should_fail/T25901_sub_a.stderr - + testsuite/tests/rename/should_fail/T25901_sub_b.hs - + testsuite/tests/rename/should_fail/T25901_sub_b.stderr - + testsuite/tests/rename/should_fail/T25901_sub_c.hs - + testsuite/tests/rename/should_fail/T25901_sub_c.stderr - + testsuite/tests/rename/should_fail/T25901_sub_c_helper.hs - + testsuite/tests/rename/should_fail/T25901_sub_d.hs - + testsuite/tests/rename/should_fail/T25901_sub_d.stderr - + testsuite/tests/rename/should_fail/T25901_sub_d_helper.hs - + testsuite/tests/rename/should_fail/T25901_sub_w.hs - + testsuite/tests/rename/should_fail/T25901_sub_w.stderr - testsuite/tests/rename/should_fail/all.T - + testsuite/tests/simd/should_run/T26411.hs - + testsuite/tests/simd/should_run/T26411.stdout - + testsuite/tests/simd/should_run/T26411b.hs - + testsuite/tests/simd/should_run/T26411b.stdout - testsuite/tests/simd/should_run/all.T - testsuite/tests/simplStg/should_compile/all.T - testsuite/tests/warnings/should_compile/DodgyExports03.stderr - testsuite/tests/warnings/should_compile/DodgyImports.stderr - + testsuite/tests/warnings/should_compile/DodgyImports02.hs - + testsuite/tests/warnings/should_compile/DodgyImports02.stderr - + testsuite/tests/warnings/should_compile/DodgyImports03.hs - + testsuite/tests/warnings/should_compile/DodgyImports03.stderr - + testsuite/tests/warnings/should_compile/DodgyImports03_helper.hs - + testsuite/tests/warnings/should_compile/DodgyImports04.hs - + testsuite/tests/warnings/should_compile/DodgyImports04.stderr - testsuite/tests/warnings/should_compile/DodgyImports_hiding.stderr - testsuite/tests/warnings/should_compile/all.T - utils/check-exact/ExactPrint.hs - utils/genapply/Main.hs The diff was not included because it is too large. View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7c7a69bdc48af1b35fcf47a62fb6c7… -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/7c7a69bdc48af1b35fcf47a62fb6c7… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/split-sections-for-cross-stage0
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed new branch wip/split-sections-for-cross-stage0 at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/split-sections-for-cross-stag… You're receiving this email because of your account on gitlab.haskell.org.

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[Git][ghc/ghc] Pushed new branch wip/windows-no-linker-script
by Cheng Shao (＠TerrorJack) 17 Dec '25

17 Dec '25

Cheng Shao pushed new branch wip/windows-no-linker-script at Glasgow Haskell Compiler / GHC -- View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/tree/wip/windows-no-linker-script You're receiving this email because of your account on gitlab.haskell.org.

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