diff options
Diffstat (limited to 'lib/Frontend/CompilerInstance.cpp')
| -rw-r--r-- | lib/Frontend/CompilerInstance.cpp | 57 |
1 files changed, 42 insertions, 15 deletions
diff --git a/lib/Frontend/CompilerInstance.cpp b/lib/Frontend/CompilerInstance.cpp index afcaa6e878784..8b4b16920668d 100644 --- a/lib/Frontend/CompilerInstance.cpp +++ b/lib/Frontend/CompilerInstance.cpp @@ -13,6 +13,7 @@ #include "clang/AST/Decl.h" #include "clang/Basic/Diagnostic.h" #include "clang/Basic/FileManager.h" +#include "clang/Basic/MemoryBufferCache.h" #include "clang/Basic/SourceManager.h" #include "clang/Basic/TargetInfo.h" #include "clang/Basic/Version.h" @@ -55,12 +56,15 @@ using namespace clang; CompilerInstance::CompilerInstance( std::shared_ptr<PCHContainerOperations> PCHContainerOps, - bool BuildingModule) - : ModuleLoader(BuildingModule), Invocation(new CompilerInvocation()), - ModuleManager(nullptr), - ThePCHContainerOperations(std::move(PCHContainerOps)), - BuildGlobalModuleIndex(false), HaveFullGlobalModuleIndex(false), - ModuleBuildFailed(false) {} + MemoryBufferCache *SharedPCMCache) + : ModuleLoader(/* BuildingModule = */ SharedPCMCache), + Invocation(new CompilerInvocation()), + PCMCache(SharedPCMCache ? SharedPCMCache : new MemoryBufferCache), + ThePCHContainerOperations(std::move(PCHContainerOps)) { + // Don't allow this to invalidate buffers in use by others. + if (SharedPCMCache) + getPCMCache().finalizeCurrentBuffers(); +} CompilerInstance::~CompilerInstance() { assert(OutputFiles.empty() && "Still output files in flight?"); @@ -131,6 +135,8 @@ IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const { return ModuleManager; } void CompilerInstance::setModuleManager(IntrusiveRefCntPtr<ASTReader> Reader) { + assert(PCMCache.get() == &Reader->getModuleManager().getPCMCache() && + "Expected ASTReader to use the same PCM cache"); ModuleManager = std::move(Reader); } @@ -373,7 +379,7 @@ void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) { getDiagnostics(), getLangOpts(), &getTarget()); PP = std::make_shared<Preprocessor>( Invocation->getPreprocessorOptsPtr(), getDiagnostics(), getLangOpts(), - getSourceManager(), *HeaderInfo, *this, PTHMgr, + getSourceManager(), getPCMCache(), *HeaderInfo, *this, PTHMgr, /*OwnsHeaderSearch=*/true, TUKind); PP->Initialize(getTarget(), getAuxTarget()); @@ -491,6 +497,8 @@ void CompilerInstance::createPCHExternalASTSource( AllowPCHWithCompilerErrors, getPreprocessor(), getASTContext(), getPCHContainerReader(), getFrontendOpts().ModuleFileExtensions, + TheDependencyFileGenerator.get(), + DependencyCollectors, DeserializationListener, OwnDeserializationListener, Preamble, getFrontendOpts().UseGlobalModuleIndex); @@ -501,6 +509,8 @@ IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource( bool AllowPCHWithCompilerErrors, Preprocessor &PP, ASTContext &Context, const PCHContainerReader &PCHContainerRdr, ArrayRef<std::shared_ptr<ModuleFileExtension>> Extensions, + DependencyFileGenerator *DependencyFile, + ArrayRef<std::shared_ptr<DependencyCollector>> DependencyCollectors, void *DeserializationListener, bool OwnDeserializationListener, bool Preamble, bool UseGlobalModuleIndex) { HeaderSearchOptions &HSOpts = PP.getHeaderSearchInfo().getHeaderSearchOpts(); @@ -518,6 +528,12 @@ IntrusiveRefCntPtr<ASTReader> CompilerInstance::createPCHExternalASTSource( Reader->setDeserializationListener( static_cast<ASTDeserializationListener *>(DeserializationListener), /*TakeOwnership=*/OwnDeserializationListener); + + if (DependencyFile) + DependencyFile->AttachToASTReader(*Reader); + for (auto &Listener : DependencyCollectors) + Listener->attachToASTReader(*Reader); + switch (Reader->ReadAST(Path, Preamble ? serialization::MK_Preamble : serialization::MK_PCH, @@ -1032,7 +1048,7 @@ static bool compileModuleImpl(CompilerInstance &ImportingInstance, // Remove any macro definitions that are explicitly ignored by the module. // They aren't supposed to affect how the module is built anyway. - const HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts(); + HeaderSearchOptions &HSOpts = Invocation->getHeaderSearchOpts(); PPOpts.Macros.erase( std::remove_if(PPOpts.Macros.begin(), PPOpts.Macros.end(), [&HSOpts](const std::pair<std::string, bool> &def) { @@ -1063,6 +1079,8 @@ static bool compileModuleImpl(CompilerInstance &ImportingInstance, FrontendOpts.DisableFree = false; FrontendOpts.GenerateGlobalModuleIndex = false; FrontendOpts.BuildingImplicitModule = true; + // Force implicitly-built modules to hash the content of the module file. + HSOpts.ModulesHashContent = true; FrontendOpts.Inputs.clear(); InputKind IK = getSourceInputKindFromOptions(*Invocation->getLangOpts()); @@ -1074,9 +1092,11 @@ static bool compileModuleImpl(CompilerInstance &ImportingInstance, Invocation->getModuleHash() && "Module hash mismatch!"); // Construct a compiler instance that will be used to actually create the - // module. + // module. Since we're sharing a PCMCache, + // CompilerInstance::CompilerInstance is responsible for finalizing the + // buffers to prevent use-after-frees. CompilerInstance Instance(ImportingInstance.getPCHContainerOperations(), - /*BuildingModule=*/true); + &ImportingInstance.getPreprocessor().getPCMCache()); auto &Inv = *Invocation; Instance.setInvocation(std::move(Invocation)); @@ -1180,10 +1200,14 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance, llvm::LockFileManager Locked(ModuleFileName); switch (Locked) { case llvm::LockFileManager::LFS_Error: - Diags.Report(ModuleNameLoc, diag::err_module_lock_failure) + // PCMCache takes care of correctness and locks are only necessary for + // performance. Fallback to building the module in case of any lock + // related errors. + Diags.Report(ModuleNameLoc, diag::remark_module_lock_failure) << Module->Name << Locked.getErrorMessage(); - return false; - + // Clear out any potential leftover. + Locked.unsafeRemoveLockFile(); + // FALLTHROUGH case llvm::LockFileManager::LFS_Owned: // We're responsible for building the module ourselves. if (!compileModuleImpl(ImportingInstance, ModuleNameLoc, Module, @@ -1203,11 +1227,14 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance, case llvm::LockFileManager::Res_OwnerDied: continue; // try again to get the lock. case llvm::LockFileManager::Res_Timeout: - Diags.Report(ModuleNameLoc, diag::err_module_lock_timeout) + // Since PCMCache takes care of correctness, we try waiting for another + // process to complete the build so clang does not do it done twice. If + // case of timeout, build it ourselves. + Diags.Report(ModuleNameLoc, diag::remark_module_lock_timeout) << Module->Name; // Clear the lock file so that future invokations can make progress. Locked.unsafeRemoveLockFile(); - return false; + continue; } break; } |