[clang-fuzzer] Add new fuzzer target for Objective-C

Summary:
- Similar to that of `clang-fuzzer` itself but instead only
  targets Objective-C source files via cc1

- Also adds an example corpus directory containing some
  input for Objective-C

Subscribers: mgorny, jfb, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D69171

llvm-svn: 375453

2 files changed, 4 insertions, 2 deletions

diff --git a/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp b/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp
index bc172f23733..32d351f4c3e 100644
--- a/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp
+++ b/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.cpp
@@ -21,12 +21,13 @@
 using namespace clang;
 
 void clang_fuzzer::HandleCXX(const std::string &S,
+                             const char *FileName,
                              const std::vector<const char *> &ExtraArgs) {
   llvm::opt::ArgStringList CC1Args;
   CC1Args.push_back("-cc1");
   for (auto &A : ExtraArgs)
     CC1Args.push_back(A);
-  CC1Args.push_back("./test.cc");
+  CC1Args.push_back(FileName);
 
   llvm::IntrusiveRefCntPtr<FileManager> Files(
       new FileManager(FileSystemOptions()));
@@ -39,7 +40,7 @@ void clang_fuzzer::HandleCXX(const std::string &S,
       tooling::newInvocation(&Diagnostics, CC1Args));
   std::unique_ptr<llvm::MemoryBuffer> Input =
       llvm::MemoryBuffer::getMemBuffer(S);
-  Invocation->getPreprocessorOpts().addRemappedFile("./test.cc",
+  Invocation->getPreprocessorOpts().addRemappedFile(FileName,
                                                     Input.release());
   std::unique_ptr<tooling::ToolAction> action(
       tooling::newFrontendActionFactory<clang::EmitObjAction>());
diff --git a/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.h b/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.h
index 8359bea9691..2126ae9ea37 100644
--- a/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.h
+++ b/clang/tools/clang-fuzzer/handle-cxx/handle_cxx.h
@@ -18,6 +18,7 @@
 
 namespace clang_fuzzer {
 void HandleCXX(const std::string &S,
+               const char *FileName,
                const std::vector<const char *> &ExtraArgs);
 } // namespace clang_fuzzer