Ensure code flushing is disabled in incremental marking.

src/mark-compact.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1985 matching lines @@
   MarkCompactWeakObjectRetainer mark_compact_object_retainer;
   heap()->ProcessWeakReferences(&mark_compact_object_retainer);
 
   // Remove object groups after marking phase.
   heap()->isolate()->global_handles()->RemoveObjectGroups();
   heap()->isolate()->global_handles()->RemoveImplicitRefGroups();
 
   // Flush code from collected candidates.
   if (is_code_flushing_enabled()) {
     code_flusher_->ProcessCandidates();
+    // TODO(1609) Currently incremental marker does not support code flushing,
+    // we need to disable it before incremental marking steps for next cycle.
+    EnableCodeFlushing(false);
   }
 
   if (!FLAG_watch_ic_patching) {
     // Clean up dead objects from the runtime profiler.
     heap()->isolate()->runtime_profiler()->RemoveDeadSamples();
   }
 
   if (FLAG_track_gc_object_stats) {
     heap()->CheckpointObjectStats();
   }
@@ skipping 1734 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal