| 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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #include "ModelInjector.h" |
| 10 | #include "clang/AST/Decl.h" |
| 11 | #include "clang/Basic/IdentifierTable.h" |
| 12 | #include "clang/Basic/Stack.h" |
| 13 | #include "clang/Frontend/ASTUnit.h" |
| 14 | #include "clang/Frontend/CompilerInstance.h" |
| 15 | #include "clang/Frontend/FrontendAction.h" |
| 16 | #include "clang/Lex/Preprocessor.h" |
| 17 | #include "clang/Serialization/ASTReader.h" |
| 18 | #include "clang/StaticAnalyzer/Frontend/FrontendActions.h" |
| 19 | #include "llvm/ADT/STLExtras.h" |
| 20 | #include "llvm/Support/CrashRecoveryContext.h" |
| 21 | #include "llvm/Support/FileSystem.h" |
| 22 | #include <utility> |
| 23 | |
| 24 | using namespace clang; |
| 25 | using namespace ento; |
| 26 | |
| 27 | ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {} |
| 28 | |
| 29 | Stmt *ModelInjector::getBody(const FunctionDecl *D) { |
| 30 | onBodySynthesis(D); |
| 31 | return Bodies[D->getName()]; |
| 32 | } |
| 33 | |
| 34 | Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) { |
| 35 | onBodySynthesis(D); |
| 36 | return Bodies[D->getName()]; |
| 37 | } |
| 38 | |
| 39 | void ModelInjector::onBodySynthesis(const NamedDecl *D) { |
| 40 | |
| 41 | // FIXME: what about overloads? Declarations can be used as keys but what |
| 42 | // about file name index? Mangled names may not be suitable for that either. |
| 43 | if (Bodies.count(D->getName()) != 0) |
| 44 | return; |
| 45 | |
| 46 | SourceManager &SM = CI.getSourceManager(); |
| 47 | FileID mainFileID = SM.getMainFileID(); |
| 48 | |
| 49 | AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts(); |
| 50 | llvm::StringRef modelPath = analyzerOpts->ModelPath; |
| 51 | |
| 52 | llvm::SmallString<128> fileName; |
| 53 | |
| 54 | if (!modelPath.empty()) |
| 55 | fileName = |
| 56 | llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model"); |
| 57 | else |
| 58 | fileName = llvm::StringRef(D->getName().str() + ".model"); |
| 59 | |
| 60 | if (!llvm::sys::fs::exists(fileName.str())) { |
| 61 | Bodies[D->getName()] = nullptr; |
| 62 | return; |
| 63 | } |
| 64 | |
| 65 | auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation()); |
| 66 | |
| 67 | FrontendOptions &FrontendOpts = Invocation->getFrontendOpts(); |
| 68 | InputKind IK = InputKind::CXX; // FIXME |
| 69 | FrontendOpts.Inputs.clear(); |
| 70 | FrontendOpts.Inputs.emplace_back(fileName, IK); |
| 71 | FrontendOpts.DisableFree = true; |
| 72 | |
| 73 | Invocation->getDiagnosticOpts().VerifyDiagnostics = 0; |
| 74 | |
| 75 | // Modules are parsed by a separate CompilerInstance, so this code mimics that |
| 76 | // behavior for models |
| 77 | CompilerInstance Instance(CI.getPCHContainerOperations()); |
| 78 | Instance.setInvocation(std::move(Invocation)); |
| 79 | Instance.createDiagnostics( |
| 80 | new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()), |
| 81 | /*ShouldOwnClient=*/true); |
| 82 | |
| 83 | Instance.getDiagnostics().setSourceManager(&SM); |
| 84 | |
| 85 | // The instance wants to take ownership, however DisableFree frontend option |
| 86 | // is set to true to avoid double free issues |
| 87 | Instance.setFileManager(&CI.getFileManager()); |
| 88 | Instance.setSourceManager(&SM); |
| 89 | Instance.setPreprocessor(CI.getPreprocessorPtr()); |
| 90 | Instance.setASTContext(&CI.getASTContext()); |
| 91 | |
| 92 | Instance.getPreprocessor().InitializeForModelFile(); |
| 93 | |
| 94 | ParseModelFileAction parseModelFile(Bodies); |
| 95 | |
| 96 | llvm::CrashRecoveryContext CRC; |
| 97 | |
| 98 | CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); }, |
| 99 | DesiredStackSize); |
| 100 | |
| 101 | Instance.getPreprocessor().FinalizeForModelFile(); |
| 102 | |
| 103 | Instance.resetAndLeakSourceManager(); |
| 104 | Instance.resetAndLeakFileManager(); |
| 105 | Instance.resetAndLeakPreprocessor(); |
| 106 | |
| 107 | // The preprocessor enters to the main file id when parsing is started, so |
| 108 | // the main file id is changed to the model file during parsing and it needs |
| 109 | // to be reset to the former main file id after parsing of the model file |
| 110 | // is done. |
| 111 | SM.setMainFileID(mainFileID); |
| 112 | } |
| 113 |