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// Copyright 2018 The Chromium 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 "third_party/blink/renderer/platform/heap/unified_heap_marking_visitor.h"
#include "third_party/blink/renderer/platform/bindings/dom_wrapper_map.h"
#include "third_party/blink/renderer/platform/bindings/script_wrappable.h"
#include "third_party/blink/renderer/platform/bindings/trace_wrapper_v8_reference.h"
#include "third_party/blink/renderer/platform/bindings/v8_per_isolate_data.h"
#include "third_party/blink/renderer/platform/heap/unified_heap_controller.h"
namespace blink {
std::unique_ptr<UnifiedHeapMarkingVisitor> UnifiedHeapMarkingVisitor::Create(
ThreadState* thread_state,
MarkingMode mode,
v8::Isolate* isolate) {
DCHECK(thread_state);
DCHECK(isolate);
return std::unique_ptr<UnifiedHeapMarkingVisitor>(
new UnifiedHeapMarkingVisitor(thread_state, mode, isolate));
}
UnifiedHeapMarkingVisitor::UnifiedHeapMarkingVisitor(ThreadState* thread_state,
MarkingMode mode,
v8::Isolate* isolate)
: MarkingVisitor(thread_state, mode), isolate_(isolate) {}
void UnifiedHeapMarkingVisitor::WriteBarrier(
v8::Isolate* isolate,
const TraceWrapperV8Reference<v8::Value>& object) {
if (!ThreadState::IsAnyIncrementalMarking())
return;
ThreadState* thread_state = ThreadState::Current();
if (!thread_state->IsIncrementalMarking())
return;
thread_state->CurrentVisitor()->Trace(object);
}
void UnifiedHeapMarkingVisitor::WriteBarrier(
v8::Isolate* isolate,
DOMWrapperMap<ScriptWrappable>* wrapper_map,
ScriptWrappable* key) {
if (!ThreadState::IsAnyIncrementalMarking())
return;
ThreadState* thread_state = ThreadState::Current();
if (!thread_state->IsIncrementalMarking())
return;
thread_state->CurrentVisitor()->Trace(wrapper_map, key);
}
void UnifiedHeapMarkingVisitor::WriteBarrier(
v8::Isolate* isolate,
const WrapperTypeInfo* wrapper_type_info,
void* object) {
// |object| here is either ScriptWrappable or CustomWrappable.
if (!ThreadState::IsAnyIncrementalMarking())
return;
ThreadState* thread_state = ThreadState::Current();
if (!thread_state->IsIncrementalMarking())
return;
wrapper_type_info->Trace(thread_state->CurrentVisitor(), object);
}
void UnifiedHeapMarkingVisitor::Visit(
const TraceWrapperV8Reference<v8::Value>& v8_reference) {
if (v8_reference.Get().IsEmpty())
return;
DCHECK(isolate_);
v8_reference.Get().RegisterExternalReference(isolate_);
}
void UnifiedHeapMarkingVisitor::Visit(
DOMWrapperMap<ScriptWrappable>* wrapper_map,
const ScriptWrappable* key) {
wrapper_map->MarkWrapper(const_cast<ScriptWrappable*>(key));
}
} // namespace blink
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