1//==-- handle_cxx.cpp - Helper function for Clang fuzzers ------------------==//
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// Implements HandleCXX for use by the Clang fuzzers.
10//
11//===----------------------------------------------------------------------===//
12
13#include "handle_cxx.h"
14
15#include "clang/CodeGen/CodeGenAction.h"
16#include "clang/Frontend/CompilerInstance.h"
17#include "clang/Lex/PreprocessorOptions.h"
18#include "clang/Tooling/Tooling.h"
19#include "llvm/Option/Option.h"
20
21using namespace clang;
22
23void clang_fuzzer::HandleCXX(const std::string &S,
24                             const char *FileName,
25                             const std::vector<const char *> &ExtraArgs) {
26  llvm::opt::ArgStringList CC1Args;
27  CC1Args.push_back("-cc1");
28  for (auto &A : ExtraArgs)
29    CC1Args.push_back(A);
30  CC1Args.push_back(FileName);
31
32  llvm::IntrusiveRefCntPtr<FileManager> Files(
33      new FileManager(FileSystemOptions()));
34  IgnoringDiagConsumer Diags;
35  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
36  DiagnosticsEngine Diagnostics(
37      IntrusiveRefCntPtr<clang::DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
38      &Diags, false);
39  std::unique_ptr<clang::CompilerInvocation> Invocation(
40      tooling::newInvocation(&Diagnostics, CC1Args, /*BinaryName=*/nullptr));
41  std::unique_ptr<llvm::MemoryBuffer> Input =
42      llvm::MemoryBuffer::getMemBuffer(S);
43  Invocation->getPreprocessorOpts().addRemappedFile(FileName,
44                                                    Input.release());
45  std::unique_ptr<tooling::ToolAction> action(
46      tooling::newFrontendActionFactory<clang::EmitObjAction>());
47  std::shared_ptr<PCHContainerOperations> PCHContainerOps =
48      std::make_shared<PCHContainerOperations>();
49  action->runInvocation(std::move(Invocation), Files.get(), PCHContainerOps,
50                        &Diags);
51}
52
53