blob: 32c88b955197317e79b23c8e43e9cc168a61760f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// 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.
#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_UNIFIED_HEAP_MARKING_VISITOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_UNIFIED_HEAP_MARKING_VISITOR_H_
#include "base/macros.h"
#include "third_party/blink/renderer/platform/heap/marking_visitor.h"
namespace blink {
struct WrapperTypeInfo;
// Marking visitor for unified heap garbage collections. Extends the regular
// Oilpan marking visitor by also providing write barriers and visitation
// methods that allow for announcing reachable objects to V8.
class PLATFORM_EXPORT UnifiedHeapMarkingVisitor final : public MarkingVisitor {
public:
static std::unique_ptr<UnifiedHeapMarkingVisitor> Create(ThreadState*,
MarkingMode,
v8::Isolate*);
// Write barriers for annotating a write during incremental marking.
static void WriteBarrier(v8::Isolate*,
const TraceWrapperV8Reference<v8::Value>&);
static void WriteBarrier(v8::Isolate*,
DOMWrapperMap<ScriptWrappable>*,
ScriptWrappable*);
static void WriteBarrier(v8::Isolate*, const WrapperTypeInfo*, void*);
~UnifiedHeapMarkingVisitor() override = default;
// Visitation methods that announce reachable wrappers to V8.
void Visit(const TraceWrapperV8Reference<v8::Value>&) final;
void Visit(DOMWrapperMap<ScriptWrappable>*, const ScriptWrappable*) final;
private:
UnifiedHeapMarkingVisitor(ThreadState*, MarkingMode, v8::Isolate*);
v8::Isolate* const isolate_;
DISALLOW_COPY_AND_ASSIGN(UnifiedHeapMarkingVisitor);
};
} // namespace blink
#endif // THIRD_PARTY_BLINK_RENDERER_PLATFORM_HEAP_UNIFIED_HEAP_MARKING_VISITOR_H_
|
