6976186: integrate Shark HotSpot changes

Shark is a JIT compiler for Zero that uses the LLVM compiler infrastructure.

Reviewed-by: kvn, twisti

hotspot/src/share/vm/runtime/frame.cpp

@@ -1100,6 +1100,10 @@ void frame::oops_do_internal(OopClosure* f, CodeBlobClosure* cf, RegisterMap* ma
     oops_entry_do(f, map);
   } else if (CodeCache::contains(pc())) {
     oops_code_blob_do(f, cf, map);
+#ifdef SHARK
+  } else if (is_fake_stub_frame()) {
+    // nothing to do
+#endif // SHARK
   } else {
     ShouldNotReachHere();
   }