Andrew Zambazos
82 lines
3.0 KiB
JavaScript
82 lines
3.0 KiB
JavaScript
/*
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* Copyright (C) 2016 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. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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WI.HeapAllocationsInstrument = class HeapAllocationsInstrument extends WI.Instrument
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{
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constructor()
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{
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super();
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this._snapshotIntervalIdentifier = undefined;
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}
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// Protected
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get timelineRecordType()
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{
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return WI.TimelineRecord.Type.HeapAllocations;
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}
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startInstrumentation(initiatedByBackend)
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{
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// FIXME: Include a "track allocations" option for this instrument.
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// FIXME: Include a periodic snapshot interval option for this instrument.
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if (!initiatedByBackend) {
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let target = WI.assumingMainTarget();
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target.HeapAgent.startTracking();
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}
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// Periodic snapshots.
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const snapshotInterval = 10_000;
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this._snapshotIntervalIdentifier = setInterval(this._takeHeapSnapshot.bind(this), snapshotInterval);
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}
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stopInstrumentation(initiatedByBackend)
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{
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if (!initiatedByBackend) {
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let target = WI.assumingMainTarget();
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target.HeapAgent.stopTracking();
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}
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window.clearInterval(this._snapshotIntervalIdentifier);
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this._snapshotIntervalIdentifier = undefined;
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}
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// Private
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_takeHeapSnapshot()
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{
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WI.heapManager.snapshot((error, timestamp, snapshotStringData) => {
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let workerProxy = WI.HeapSnapshotWorkerProxy.singleton();
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workerProxy.createSnapshot(snapshotStringData, ({objectId, snapshot: serializedSnapshot}) => {
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let snapshot = WI.HeapSnapshotProxy.deserialize(objectId, serializedSnapshot);
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snapshot.snapshotStringData = snapshotStringData;
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WI.timelineManager.heapSnapshotAdded(timestamp, snapshot);
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});
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});
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}
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};
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