866879f803
Since https://github.com/llvm/llvm-project/pull/158381 the `CompilerInstance` is aware of the VFS and co-owns it. To reduce scope of that PR, the VFS was being inherited from the `FileManager` during `setFileManager()` if it wasn't configured before. However, the implementation of that setter was buggy. This PR fixes the bug, and moves us closer to the long-term goal of `CompilerInstance` requiring the VFS to be configured explicitly and owned by the instance.
123 lines
4.2 KiB
C++
123 lines
4.2 KiB
C++
//===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "ModelInjector.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/DeclObjC.h"
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#include "clang/Basic/DiagnosticDriver.h"
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#include "clang/Basic/LangStandard.h"
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#include "clang/Basic/Stack.h"
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#include "clang/Frontend/ASTUnit.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/FrontendAction.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Serialization/ASTReader.h"
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#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
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#include "llvm/Support/CrashRecoveryContext.h"
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#include "llvm/Support/FileSystem.h"
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#include <utility>
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using namespace clang;
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using namespace ento;
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ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {
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if (CI.getAnalyzerOpts().ShouldEmitErrorsOnInvalidConfigValue &&
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!CI.getAnalyzerOpts().ModelPath.empty()) {
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auto S = CI.getVirtualFileSystem().status(CI.getAnalyzerOpts().ModelPath);
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if (!S || S->getType() != llvm::sys::fs::file_type::directory_file)
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CI.getDiagnostics().Report(diag::err_analyzer_config_invalid_input)
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<< "model-path" << "a filename";
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}
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}
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Stmt *ModelInjector::getBody(const FunctionDecl *D) {
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onBodySynthesis(D);
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return Bodies[D->getName()];
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}
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Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) {
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onBodySynthesis(D);
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return Bodies[D->getName()];
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}
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void ModelInjector::onBodySynthesis(const NamedDecl *D) {
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// FIXME: what about overloads? Declarations can be used as keys but what
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// about file name index? Mangled names may not be suitable for that either.
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if (Bodies.count(D->getName()) != 0)
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return;
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llvm::IntrusiveRefCntPtr<SourceManager> SM = CI.getSourceManagerPtr();
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FileID mainFileID = SM->getMainFileID();
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llvm::StringRef modelPath = CI.getAnalyzerOpts().ModelPath;
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llvm::SmallString<128> fileName;
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if (!modelPath.empty())
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fileName =
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llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model");
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else
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fileName = llvm::StringRef(D->getName().str() + ".model");
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if (!CI.getVirtualFileSystem().exists(fileName)) {
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Bodies[D->getName()] = nullptr;
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return;
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}
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auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation());
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FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
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InputKind IK = Language::CXX; // FIXME
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FrontendOpts.Inputs.clear();
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FrontendOpts.Inputs.emplace_back(fileName, IK);
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FrontendOpts.DisableFree = true;
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Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
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// Modules are parsed by a separate CompilerInstance, so this code mimics that
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// behavior for models
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CompilerInstance Instance(std::move(Invocation),
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CI.getPCHContainerOperations());
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Instance.setVirtualFileSystem(CI.getVirtualFileSystemPtr());
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Instance.createDiagnostics(
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new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()),
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/*ShouldOwnClient=*/true);
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Instance.getDiagnostics().setSourceManager(SM.get());
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// The instance wants to take ownership, however DisableFree frontend option
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// is set to true to avoid double free issues
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Instance.setVirtualFileSystem(CI.getVirtualFileSystemPtr());
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Instance.setFileManager(CI.getFileManagerPtr());
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Instance.setSourceManager(SM);
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Instance.setPreprocessor(CI.getPreprocessorPtr());
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Instance.setASTContext(CI.getASTContextPtr());
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Instance.getPreprocessor().InitializeForModelFile();
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ParseModelFileAction parseModelFile(Bodies);
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llvm::CrashRecoveryContext CRC;
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CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); },
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DesiredStackSize);
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Instance.getPreprocessor().FinalizeForModelFile();
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Instance.resetAndLeakSourceManager();
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Instance.resetAndLeakFileManager();
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Instance.resetAndLeakPreprocessor();
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// The preprocessor enters to the main file id when parsing is started, so
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// the main file id is changed to the model file during parsing and it needs
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// to be reset to the former main file id after parsing of the model file
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// is done.
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SM->setMainFileID(mainFileID);
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}
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