Introduce EmbedderHeapTracer

src/api.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/api.h"
 
 #include <string.h>  // For memcpy, strlen.
 #ifdef V8_USE_ADDRESS_SANITIZER
 #include <sanitizer/asan_interface.h>
 #endif  // V8_USE_ADDRESS_SANITIZER
@@ skipping 659 matching lines @@
 i::Object** V8::CopyPersistent(i::Object** obj) {
   i::Handle<i::Object> result = i::GlobalHandles::CopyGlobal(obj);
 #ifdef VERIFY_HEAP
   if (i::FLAG_verify_heap) {
     (*obj)->ObjectVerify();
   }
 #endif  // VERIFY_HEAP
   return result.location();
 }
 
+void V8::AddObjectToMarkingDeque(i::Object** object, i::Isolate* isolate) {
+  i::GlobalHandles::AddObjectToMarkingDeque(object, isolate);

[Hannes Payer (out of office), 2016/03/31 11:13:22]

Why do you go through GlobalHandles? You could call the registration function on
heap right away.

[Marcel Hlopko, 2016/03/31 11:58:59]

Seemed like I should leave a breadcrumb in the global handles, but I agree, it's
more of a bloat. Removed.

+}
 
 void V8::MakeWeak(i::Object** object, void* parameter,
                   WeakCallback weak_callback) {
   i::GlobalHandles::MakeWeak(object, parameter, weak_callback);
 }
 
 
 void V8::MakeWeak(i::Object** object, void* parameter,
                   int internal_field_index1, int internal_field_index2,
                   WeakCallbackInfo<void>::Callback weak_callback) {
@@ skipping 6477 matching lines @@
       reinterpret_cast<v8::Isolate::GCCallback>(callback), gc_type, false);
 }
 
 
 void V8::AddGCEpilogueCallback(GCCallback callback, GCType gc_type) {
   i::Isolate* isolate = i::Isolate::Current();
   isolate->heap()->AddGCEpilogueCallback(
       reinterpret_cast<v8::Isolate::GCCallback>(callback), gc_type, false);
 }
 
+void Isolate::SetEmbedderHeapTracer(EmbedderHeapTracer* tracer) {
+  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
+  isolate->heap()->SetEmbedderHeapTracer(tracer);
+}
 
 void Isolate::AddMemoryAllocationCallback(MemoryAllocationCallback callback,
                                           ObjectSpace space,
                                           AllocationAction action) {
   i::Isolate* isolate = reinterpret_cast<i::Isolate*>(this);
   isolate->memory_allocator()->AddMemoryAllocationCallback(
       callback, space, action);
 }
 
 
@@ skipping 1574 matching lines @@
   Address callback_address =
       reinterpret_cast<Address>(reinterpret_cast<intptr_t>(callback));
   VMState<EXTERNAL> state(isolate);
   ExternalCallbackScope call_scope(isolate, callback_address);
   callback(info);
 }
 
 
 }  // namespace internal
 }  // namespace v8