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// Copyright 2020 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.
#ifndef V8_HEAP_CPPGC_JS_UNIFIED_HEAP_MARKING_STATE_H_
#define V8_HEAP_CPPGC_JS_UNIFIED_HEAP_MARKING_STATE_H_
#include "include/v8-cppgc.h"
#include "include/v8.h"
#include "src/base/logging.h"
#include "src/heap/heap.h"
namespace v8 {
namespace internal {
class BasicTracedReferenceExtractor {
public:
static Address* ObjectReference(const TracedReferenceBase& ref) {
return reinterpret_cast<Address*>(ref.val_);
}
};
class UnifiedHeapMarkingState {
public:
explicit UnifiedHeapMarkingState(Heap* heap) : heap_(heap) {}
UnifiedHeapMarkingState(const UnifiedHeapMarkingState&) = delete;
UnifiedHeapMarkingState& operator=(const UnifiedHeapMarkingState&) = delete;
inline void MarkAndPush(const TracedReferenceBase&);
private:
Heap* heap_;
};
void UnifiedHeapMarkingState::MarkAndPush(const TracedReferenceBase& ref) {
// The same visitor is used in testing scenarios without attaching the heap to
// an Isolate under the assumption that no non-empty v8 references are found.
// Having the following DCHECK crash means that the heap is in detached mode
// but we find traceable pointers into an Isolate.
DCHECK_NOT_NULL(heap_);
heap_->RegisterExternallyReferencedObject(
BasicTracedReferenceExtractor::ObjectReference(ref));
}
} // namespace internal
} // namespace v8
#endif // V8_HEAP_CPPGC_JS_UNIFIED_HEAP_MARKING_STATE_H_
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