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
21 using namespace clang;
22
HandleCXX(const std::string & S,const char * FileName,const std::vector<const char * > & ExtraArgs)23 void 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