3 files changed, 95 insertions, 0 deletions
diff --git a/tools/clang-fuzzer/handle-cxx/CMakeLists.txt b/tools/clang-fuzzer/handle-cxx/CMakeLists.txt
new file mode 100644
index 0000000000000..caf1dba7af676
--- /dev/null
+++ b/tools/clang-fuzzer/handle-cxx/CMakeLists.txt
@@ -0,0 +1,12 @@
+set(LLVM_LINK_COMPONENTS ${LLVM_TARGETS_TO_BUILD} Support)
+
+add_clang_library(clangHandleCXX
+  handle_cxx.cpp
+
+  LINK_LIBS
+  clangBasic
+  clangCodeGen
+  clangFrontend
+  clangLex
+  clangTooling
+  )
diff --git a/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp b/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp
new file mode 100644
index 0000000000000..312ab91e5fe21
--- /dev/null
+++ b/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp
@@ -0,0 +1,58 @@
+//==-- handle_cxx.cpp - Helper function for Clang fuzzers ------------------==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements HandleCXX for use by the Clang fuzzers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "handle_cxx.h"
+
+#include "clang/CodeGen/CodeGenAction.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Lex/PreprocessorOptions.h"
+#include "clang/Tooling/Tooling.h"
+#include "llvm/Option/Option.h"
+#include "llvm/Support/TargetSelect.h"
+
+using namespace clang;
+
+void clang_fuzzer::HandleCXX(const std::string &S,
+                             const std::vector<const char *> &ExtraArgs) {
+  llvm::InitializeAllTargets();
+  llvm::InitializeAllTargetMCs();
+  llvm::InitializeAllAsmPrinters();
+  llvm::InitializeAllAsmParsers();
+
+  llvm::opt::ArgStringList CC1Args;
+  CC1Args.push_back("-cc1");
+  for (auto &A : ExtraArgs)
+    CC1Args.push_back(A);
+  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::EmitObjAction>());
+  std::shared_ptr<PCHContainerOperations> PCHContainerOps =
+      std::make_shared<PCHContainerOperations>();
+  action->runInvocation(std::move(Invocation), Files.get(), PCHContainerOps,
+                        &Diags);
+}
+
diff --git a/tools/clang-fuzzer/handle-cxx/handle_cxx.h b/tools/clang-fuzzer/handle-cxx/handle_cxx.h
new file mode 100644
index 0000000000000..e76311ff39c41
--- /dev/null
+++ b/tools/clang-fuzzer/handle-cxx/handle_cxx.h
@@ -0,0 +1,25 @@
+//==-- handle_cxx.h - Helper function for Clang fuzzers --------------------==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Defines HandleCXX for use by the Clang fuzzers.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_CLANG_FUZZER_HANDLE_CXX_HANDLECXX_H
+#define LLVM_CLANG_TOOLS_CLANG_FUZZER_HANDLE_CXX_HANDLECXX_H
+
+#include <string>
+#include <vector>
+
+namespace clang_fuzzer {
+void HandleCXX(const std::string &S,
+               const std::vector<const char *> &ExtraArgs);
+} // namespace clang_fuzzer
+
+#endif