//==-- handle_cxx.cpp - Helper function for Clang fuzzers ------------------==//

//

// 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

//

//===----------------------------------------------------------------------===//

//

// Implements HandleCXX for use by the Clang fuzzers.

//

//===----------------------------------------------------------------------===//

#include "handle_cxx.h"

#include "clang/CodeGen/CodeGenAction.h"

#include "clang/Frontend/CompilerInstance.h"

#include "clang/Lex/PreprocessorOptions.h"

#include "clang/Tooling/Tooling.h"

#include "llvm/Option/Option.h"

using namespace clang;

void clang_fuzzer::HandleCXX(const std::string &S,

                             const char *FileName,

                             const std::vector<const char *> &ExtraArgs) {

  llvm::opt::ArgStringList CC1Args;

  CC1Args.push_back("-cc1");

  for (auto &A : ExtraArgs)

    CC1Args.push_back(A);

  CC1Args.push_back(FileName);

  llvm::IntrusiveRefCntPtr<FileManager> Files(

      new FileManager(FileSystemOptions()));

  IgnoringDiagConsumer Diags;

  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();

  DiagnosticsEngine Diagnostics(

      IntrusiveRefCntPtr<clang::DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,

      &Diags, false);

  std::unique_ptr<clang::CompilerInvocation> Invocation(

      tooling::newInvocation(&Diagnostics, CC1Args, /*BinaryName=*/nullptr));

  std::unique_ptr<llvm::MemoryBuffer> Input =

      llvm::MemoryBuffer::getMemBuffer(S);

  Invocation->getPreprocessorOpts().addRemappedFile(FileName,

                                                    Input.release());

  std::unique_ptr<tooling::ToolAction> action(

      tooling::newFrontendActionFactory<clang::EmitObjAction>());

  std::shared_ptr<PCHContainerOperations> PCHContainerOps =

      std::make_shared<PCHContainerOperations>();

  action->runInvocation(std::move(Invocation), Files.get(), PCHContainerOps,

                        &Diags);

}