1 //===-- ClangFuzzer.cpp - Fuzz Clang --------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 ///
10 /// \file
11 /// \brief This file implements a function that runs Clang on a single
12 /// input. This function is then linked into the Fuzzer library.
13 ///
14 //===----------------------------------------------------------------------===//
15
16 #include "clang/Tooling/Tooling.h"
17 #include "clang/Frontend/FrontendActions.h"
18 #include "clang/Frontend/CompilerInstance.h"
19 #include "llvm/Option/Option.h"
20
21 using namespace clang;
22
TestOneInput(uint8_t * data,size_t size)23 extern "C" void TestOneInput(uint8_t *data, size_t size) {
24 std::string s((const char *)data, size);
25 llvm::opt::ArgStringList CC1Args;
26 CC1Args.push_back("-cc1");
27 CC1Args.push_back("test.cc");
28 llvm::IntrusiveRefCntPtr<FileManager> Files(
29 new FileManager(FileSystemOptions()));
30 IgnoringDiagConsumer Diags;
31 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
32 DiagnosticsEngine Diagnostics(
33 IntrusiveRefCntPtr<clang::DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
34 &Diags, false);
35 std::unique_ptr<clang::CompilerInvocation> Invocation(
36 tooling::newInvocation(&Diagnostics, CC1Args));
37 std::unique_ptr<llvm::MemoryBuffer> Input =
38 llvm::MemoryBuffer::getMemBuffer(s);
39 Invocation->getPreprocessorOpts().addRemappedFile("test.cc", Input.release());
40 std::unique_ptr<tooling::ToolAction> action(
41 tooling::newFrontendActionFactory<clang::SyntaxOnlyAction>());
42 action->runInvocation(Invocation.release(), Files.get(), &Diags);
43 }
44