mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/*
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* Copyright (C) 2016-2019 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "HeapSnapshotBuilder.h"
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#include "TinyBloomFilter.h"
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namespace JSC {
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class HeapSnapshot {
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WTF_MAKE_FAST_ALLOCATED;
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public:
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HeapSnapshot(HeapSnapshot*);
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~HeapSnapshot();
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HeapSnapshot* previous() const { return m_previous; }
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void appendNode(const HeapSnapshotNode&);
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void sweepCell(JSCell*);
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void shrinkToFit();
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void finalize();
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bool isEmpty() const { return m_nodes.isEmpty(); }
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Optional<HeapSnapshotNode> nodeForCell(JSCell*);
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Optional<HeapSnapshotNode> nodeForObjectIdentifier(unsigned objectIdentifier);
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private:
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friend class HeapSnapshotBuilder;
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static constexpr intptr_t CellToSweepTag = 1;
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Vector<HeapSnapshotNode> m_nodes;
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TinyBloomFilter m_filter;
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HeapSnapshot* m_previous { nullptr };
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unsigned m_firstObjectIdentifier { 0 };
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unsigned m_lastObjectIdentifier { 0 };
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bool m_finalized { false };
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bool m_hasCellsToSweep { false };
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};
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} // namespace JSC
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