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(Elt: "-cc1");
28 for (auto &A : ExtraArgs)
29 CC1Args.push_back(Elt: A);
30 CC1Args.push_back(Elt: FileName);
31
32 llvm::IntrusiveRefCntPtr<FileManager> Files(
33 new FileManager(FileSystemOptions()));
34 IgnoringDiagConsumer Diags;
35 DiagnosticOptions DiagOpts;
36 DiagnosticsEngine Diagnostics(
37 IntrusiveRefCntPtr<clang::DiagnosticIDs>(new DiagnosticIDs()), DiagOpts,
38 &Diags, false);
39 std::unique_ptr<clang::CompilerInvocation> Invocation(
40 tooling::newInvocation(Diagnostics: &Diagnostics, CC1Args, /*BinaryName=*/nullptr));
41 std::unique_ptr<llvm::MemoryBuffer> Input =
42 llvm::MemoryBuffer::getMemBuffer(InputData: S);
43 Invocation->getPreprocessorOpts().addRemappedFile(From: FileName,
44 To: 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(Invocation: std::move(Invocation), Files: Files.get(), PCHContainerOps,
50 DiagConsumer: &Diags);
51}
52
53