Thumb2 Backend: Thumb2 changes for Deoptimization and Code Aging

src/mark-compact.h

 // 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 645 matching lines @@
   INLINE(static bool ShouldSkipEvacuationSlotRecording(Object* host)) {
     return Page::FromAddress(reinterpret_cast<Address>(host))->
         ShouldSkipEvacuationSlotRecording();
   }
 
   INLINE(static bool IsOnEvacuationCandidate(Object* obj)) {
     return Page::FromAddress(reinterpret_cast<Address>(obj))->
         IsEvacuationCandidate();
   }
 
+  INLINE(static bool IsCodeEntry(Address addr, Object* value)) {
+    HeapObject* obj = HeapObject::FromAddress(addr);
+    return obj->IsJSFunction() &&
+           (Code::GetCodeFromTargetAddress((Address)value) ==
+            JSFunction::cast(obj)->code());
+  }
+
   INLINE(void EvictEvacuationCandidate(Page* page)) {
     if (FLAG_trace_fragmentation) {
       PrintF("Page %p is too popular. Disabling evacuation.\n",
              reinterpret_cast<void*>(page));
     }
 
     // TODO(gc) If all evacuation candidates are too popular we
     // should stop slots recording entirely.
     page->ClearEvacuationCandidate();
 
@@ skipping 340 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_