Heap profiler: implement diffing of snapshots.

src/heap-profiler.cc

 // Copyright 2009 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 346 matching lines @@
   ASSERT(singleton_ != NULL);
   return singleton_->TakeSnapshotImpl(name);
 }
 
 
 HeapSnapshot* HeapProfiler::TakeSnapshotImpl(const char* name) {
   Heap::CollectAllGarbage(false);
   HeapSnapshot* result = snapshots_->NewSnapshot(name, next_snapshot_uid_++);
   HeapSnapshotGenerator generator(result);
   generator.GenerateSnapshot();
+  snapshots_->SnapshotGenerationFinished();
   return result;
 }
 
 
 HeapSnapshot* HeapProfiler::TakeSnapshotImpl(String* name) {
   return TakeSnapshotImpl(snapshots_->GetName(name));
 }
 
 
 int HeapProfiler::GetSnapshotsCount() {
   ASSERT(singleton_ != NULL);
   return singleton_->snapshots_->snapshots()->length();
 }
 
 
 HeapSnapshot* HeapProfiler::GetSnapshot(int index) {
   ASSERT(singleton_ != NULL);
   return singleton_->snapshots_->snapshots()->at(index);
 }
 
 
 HeapSnapshot* HeapProfiler::FindSnapshot(unsigned uid) {
   ASSERT(singleton_ != NULL);
   return singleton_->snapshots_->GetSnapshot(uid);
 }
 
 
+void HeapProfiler::ObjectMoveEvent(Address from, Address to) {
+  ASSERT(singleton_ != NULL);
+  singleton_->snapshots_->ObjectMoveEvent(from, to);
+}
+
+
 const JSObjectsClusterTreeConfig::Key JSObjectsClusterTreeConfig::kNoKey;
 const JSObjectsClusterTreeConfig::Value JSObjectsClusterTreeConfig::kNoValue;
 
 
 ConstructorHeapProfile::ConstructorHeapProfile()
     : zscope_(DELETE_ON_EXIT) {
 }
 
 
 void ConstructorHeapProfile::Call(const JSObjectsCluster& cluster,
@@ skipping 359 matching lines @@
   GlobalHandles::MakeWeak(handle.location(),
                           static_cast<void*>(stack.start()),
                           StackWeakReferenceCallback);
 }
 
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 
 } }  // namespace v8::internal