Implement prologue weak persistent handles.

runtime/vm/heap.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/heap.h"
 
 #include "platform/assert.h"
 #include "platform/utils.h"
 #include "vm/compiler_stats.h"
 #include "vm/flags.h"
@@ skipping 111 matching lines @@
   old_space_->VisitObjectPointers(visitor);
   code_space_->VisitObjectPointers(visitor);
 }
 
 
 void Heap::IterateCodePointers(ObjectPointerVisitor* visitor) {
   code_space_->VisitObjectPointers(visitor);
 }
 
 
-void Heap::CollectGarbage(Space space) {
+void Heap::CollectGarbage(Space space, ApiCallbacks api_callbacks) {
+  bool invoke_api_callbacks = (api_callbacks == kInvokeApiCallbacks);
   switch (space) {
     case kNew:
-      new_space_->Scavenge();
+      new_space_->Scavenge(invoke_api_callbacks);
       break;
     case kOld:
-      old_space_->MarkSweep();
+      old_space_->MarkSweep(invoke_api_callbacks);
       break;
     case kExecutable:
       UNIMPLEMENTED();
-      code_space_->MarkSweep();
+      code_space_->MarkSweep(invoke_api_callbacks);
       break;
     default:
       UNREACHABLE();
   }
 }
 
 
+void Heap::CollectGarbage(Space space) {
+  ApiCallbacks api_callbacks;
+  if (space == kNew || space == kExecutable) {
+    api_callbacks = kIgnoreApiCallbacks;
+  } else {
+    api_callbacks = kInvokeApiCallbacks;
+  }
+  CollectGarbage(space, api_callbacks);
+}
+
+
 void Heap::CollectAllGarbage() {
-  new_space_->Scavenge();
-  old_space_->MarkSweep();
+  new_space_->Scavenge(kInvokeApiCallbacks);
+  old_space_->MarkSweep(kInvokeApiCallbacks);
   // TODO(iposva): Merge old and code space.
-  // code_space_->MarkSweep();
+  // code_space_->MarkSweep(kInvokeApiCallbacks);
 }
 
 
 uword Heap::TopAddress() {
   return reinterpret_cast<uword>(new_space_->TopAddress());
 }
 
 
 uword Heap::EndAddress() {
   return reinterpret_cast<uword>(new_space_->EndAddress());
@@ skipping 22 matching lines @@
   isolate()->IncrementNoGCScopeDepth();
 }
 
 
 NoGCScope::~NoGCScope() {
   isolate()->DecrementNoGCScopeDepth();
 }
 #endif  // defined(DEBUG)
 
 }  // namespace dart