llvm-project/clang/tools/clang-fuzzer/ClangFuzzer.cpp

49 lines
1.9 KiB
C++

//===-- ClangFuzzer.cpp - Fuzz Clang --------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
/// \brief This file implements a function that runs Clang on a single
/// input. This function is then linked into the Fuzzer library.
///
//===----------------------------------------------------------------------===//
#include "clang/Tooling/Tooling.h"
#include "clang/Frontend/FrontendActions.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Lex/PreprocessorOptions.h"
#include "llvm/Option/Option.h"
using namespace clang;
extern "C" int LLVMFuzzerTestOneInput(uint8_t *data, size_t size) {
std::string s((const char *)data, size);
llvm::opt::ArgStringList CC1Args;
CC1Args.push_back("-cc1");
CC1Args.push_back("./test.cc");
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));
std::unique_ptr<llvm::MemoryBuffer> Input =
llvm::MemoryBuffer::getMemBuffer(s);
Invocation->getPreprocessorOpts().addRemappedFile("./test.cc", Input.release());
std::unique_ptr<tooling::ToolAction> action(
tooling::newFrontendActionFactory<clang::SyntaxOnlyAction>());
std::shared_ptr<PCHContainerOperations> PCHContainerOps =
std::make_shared<PCHContainerOperations>();
action->runInvocation(std::move(Invocation), Files.get(), PCHContainerOps,
&Diags);
return 0;
}