2e96cd6562
This PR is part of an effort to remove file system usage from the command line parsing code. The reason for that is that it's impossible to do file system access correctly without a configured VFS, and the VFS can only be configured after the command line is parsed. I don't want to intertwine command line parsing and VFS configuration, so I decided to perform the file system access after the command line is parsed and the VFS is configured - ideally right before the file system entity is used for the first time. This patch delays checking that `model-path` is an existing directory.
122 lines
4.2 KiB
C++
122 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 (!llvm::sys::fs::exists(fileName.str())) {
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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.createDiagnostics(
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CI.getVirtualFileSystem(),
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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.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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