123 lines · cpp
1//===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "ModelInjector.h"10#include "clang/AST/Decl.h"11#include "clang/AST/DeclObjC.h"12#include "clang/Basic/DiagnosticDriver.h"13#include "clang/Basic/LangStandard.h"14#include "clang/Basic/Stack.h"15#include "clang/Frontend/ASTUnit.h"16#include "clang/Frontend/CompilerInstance.h"17#include "clang/Frontend/FrontendAction.h"18#include "clang/Lex/Preprocessor.h"19#include "clang/Serialization/ASTReader.h"20#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"21#include "llvm/Support/CrashRecoveryContext.h"22#include "llvm/Support/FileSystem.h"23#include <utility>24 25using namespace clang;26using namespace ento;27 28ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {29 if (CI.getAnalyzerOpts().ShouldEmitErrorsOnInvalidConfigValue &&30 !CI.getAnalyzerOpts().ModelPath.empty()) {31 auto S = CI.getVirtualFileSystem().status(CI.getAnalyzerOpts().ModelPath);32 if (!S || S->getType() != llvm::sys::fs::file_type::directory_file)33 CI.getDiagnostics().Report(diag::err_analyzer_config_invalid_input)34 << "model-path" << "a filename";35 }36}37 38Stmt *ModelInjector::getBody(const FunctionDecl *D) {39 onBodySynthesis(D);40 return Bodies[D->getName()];41}42 43Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) {44 onBodySynthesis(D);45 return Bodies[D->getName()];46}47 48void ModelInjector::onBodySynthesis(const NamedDecl *D) {49 50 // FIXME: what about overloads? Declarations can be used as keys but what51 // about file name index? Mangled names may not be suitable for that either.52 if (Bodies.count(D->getName()) != 0)53 return;54 55 llvm::IntrusiveRefCntPtr<SourceManager> SM = CI.getSourceManagerPtr();56 FileID mainFileID = SM->getMainFileID();57 58 llvm::StringRef modelPath = CI.getAnalyzerOpts().ModelPath;59 60 llvm::SmallString<128> fileName;61 62 if (!modelPath.empty())63 fileName =64 llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model");65 else66 fileName = llvm::StringRef(D->getName().str() + ".model");67 68 if (!CI.getVirtualFileSystem().exists(fileName)) {69 Bodies[D->getName()] = nullptr;70 return;71 }72 73 auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation());74 75 FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();76 InputKind IK = Language::CXX; // FIXME77 FrontendOpts.Inputs.clear();78 FrontendOpts.Inputs.emplace_back(fileName, IK);79 FrontendOpts.DisableFree = true;80 81 Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;82 83 // Modules are parsed by a separate CompilerInstance, so this code mimics that84 // behavior for models85 CompilerInstance Instance(std::move(Invocation),86 CI.getPCHContainerOperations());87 Instance.setVirtualFileSystem(CI.getVirtualFileSystemPtr());88 Instance.createDiagnostics(89 new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()),90 /*ShouldOwnClient=*/true);91 92 Instance.getDiagnostics().setSourceManager(SM.get());93 94 // The instance wants to take ownership, however DisableFree frontend option95 // is set to true to avoid double free issues96 Instance.setVirtualFileSystem(CI.getVirtualFileSystemPtr());97 Instance.setFileManager(CI.getFileManagerPtr());98 Instance.setSourceManager(SM);99 Instance.setPreprocessor(CI.getPreprocessorPtr());100 Instance.setASTContext(CI.getASTContextPtr());101 102 Instance.getPreprocessor().InitializeForModelFile();103 104 ParseModelFileAction parseModelFile(Bodies);105 106 llvm::CrashRecoveryContext CRC;107 108 CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); },109 DesiredStackSize);110 111 Instance.getPreprocessor().FinalizeForModelFile();112 113 Instance.resetAndLeakSourceManager();114 Instance.resetAndLeakFileManager();115 Instance.resetAndLeakPreprocessor();116 117 // The preprocessor enters to the main file id when parsing is started, so118 // the main file id is changed to the model file during parsing and it needs119 // to be reset to the former main file id after parsing of the model file120 // is done.121 SM->setMainFileID(mainFileID);122}123