blob: 3a231c79d720d331941fbe296fe2cbf9570c471b [file] [log] [blame]
/*
* Copyright (C) 2016-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "HeapSnapshotBuilder.h"
#include "TinyBloomFilter.h"
namespace JSC {
class HeapSnapshot {
WTF_MAKE_FAST_ALLOCATED;
public:
HeapSnapshot(HeapSnapshot*);
~HeapSnapshot();
HeapSnapshot* previous() const { return m_previous; }
void appendNode(const HeapSnapshotNode&);
void sweepCell(JSCell*);
void shrinkToFit();
void finalize();
bool isEmpty() const { return m_nodes.isEmpty(); }
std::optional<HeapSnapshotNode> nodeForCell(JSCell*);
std::optional<HeapSnapshotNode> nodeForObjectIdentifier(unsigned objectIdentifier);
private:
friend class HeapSnapshotBuilder;
static constexpr intptr_t CellToSweepTag = 1;
Vector<HeapSnapshotNode> m_nodes;
TinyBloomFilter m_filter;
HeapSnapshot* m_previous { nullptr };
unsigned m_firstObjectIdentifier { 0 };
unsigned m_lastObjectIdentifier { 0 };
bool m_finalized { false };
bool m_hasCellsToSweep { false };
};
} // namespace JSC