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//===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "ModelInjector.h"
#include "clang/AST/Decl.h"
#include "clang/Basic/IdentifierTable.h"
#include "clang/Basic/LangStandard.h"
#include "clang/Basic/Stack.h"
#include "clang/AST/DeclObjC.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/FrontendAction.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Serialization/ASTReader.h"
#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/CrashRecoveryContext.h"
#include "llvm/Support/FileSystem.h"
#include <utility>
using namespace clang;
using namespace ento;
ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {}
Stmt *ModelInjector::getBody(const FunctionDecl *D) {
onBodySynthesis(D);
return Bodies[D->getName()];
}
Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) {
onBodySynthesis(D);
return Bodies[D->getName()];
}
void ModelInjector::onBodySynthesis(const NamedDecl *D) {
// FIXME: what about overloads? Declarations can be used as keys but what
// about file name index? Mangled names may not be suitable for that either.
if (Bodies.count(D->getName()) != 0)
return;
SourceManager &SM = CI.getSourceManager();
FileID mainFileID = SM.getMainFileID();
AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts();
llvm::StringRef modelPath = analyzerOpts->ModelPath;
llvm::SmallString<128> fileName;
if (!modelPath.empty())
fileName =
llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model");
else
fileName = llvm::StringRef(D->getName().str() + ".model");
if (!llvm::sys::fs::exists(fileName.str())) {
Bodies[D->getName()] = nullptr;
return;
}
auto Invocation = std::make_shared<CompilerInvocation>(CI.getInvocation());
FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
InputKind IK = Language::CXX; // FIXME
FrontendOpts.Inputs.clear();
FrontendOpts.Inputs.emplace_back(fileName, IK);
FrontendOpts.DisableFree = true;
Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
// Modules are parsed by a separate CompilerInstance, so this code mimics that
// behavior for models
CompilerInstance Instance(CI.getPCHContainerOperations());
Instance.setInvocation(std::move(Invocation));
Instance.createDiagnostics(
new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()),
/*ShouldOwnClient=*/true);
Instance.getDiagnostics().setSourceManager(&SM);
// The instance wants to take ownership, however DisableFree frontend option
// is set to true to avoid double free issues
Instance.setFileManager(&CI.getFileManager());
Instance.setSourceManager(&SM);
Instance.setPreprocessor(CI.getPreprocessorPtr());
Instance.setASTContext(&CI.getASTContext());
Instance.getPreprocessor().InitializeForModelFile();
ParseModelFileAction parseModelFile(Bodies);
llvm::CrashRecoveryContext CRC;
CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); },
DesiredStackSize);
Instance.getPreprocessor().FinalizeForModelFile();
Instance.resetAndLeakSourceManager();
Instance.resetAndLeakFileManager();
Instance.resetAndLeakPreprocessor();
// The preprocessor enters to the main file id when parsing is started, so
// the main file id is changed to the model file during parsing and it needs
// to be reset to the former main file id after parsing of the model file
// is done.
SM.setMainFileID(mainFileID);
}
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