[Heap profiler] Add construction stack trace to heap object

src/heap-profiler.cc

 // Copyright 2009-2010 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 150 matching lines @@
 
 
 SnapshotObjectId HeapProfiler::GetSnapshotObjectId(Handle<Object> obj) {
   if (!obj->IsHeapObject())
     return v8::HeapProfiler::kUnknownObjectId;
   return ids_->FindEntry(HeapObject::cast(*obj)->address());
 }
 
 
 void HeapProfiler::ObjectMoveEvent(Address from, Address to, int size) {
-  ids_->MoveObject(from, to, size);
+  bool known_object = ids_->MoveObject(from, to, size);
+  if (!known_object && !allocation_tracker_.is_empty()) {
+    allocation_tracker_->address_to_trace()->MoveObject(from, to, size);
+  }
 }
 
 
 void HeapProfiler::AllocationEvent(Address addr, int size) {
   DisallowHeapAllocation no_allocation;
   if (!allocation_tracker_.is_empty()) {
     allocation_tracker_->AllocationEvent(addr, size);
   }
 }
 
@@ skipping 30 matching lines @@
 }
 
 
 void HeapProfiler::ClearHeapObjectMap() {
   ids_.Reset(new HeapObjectsMap(heap()));
   if (!is_tracking_allocations()) is_tracking_object_moves_ = false;
 }
 
 
 } }  // namespace v8::internal