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/*
* Copyright (C) 2016 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. AND ITS CONTRIBUTORS ``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 ITS 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.
*/
WebInspector.HeapAllocationsInstrument = class HeapAllocationsInstrument extends WebInspector.Instrument
{
constructor()
{
super();
console.assert(WebInspector.HeapAllocationsInstrument.supported());
this._snapshotIntervalIdentifier = undefined;
}
// Static
static supported()
{
// COMPATIBILITY (iOS 9): HeapAgent did not exist.
return window.HeapAgent;
}
// Protected
get timelineRecordType()
{
return WebInspector.TimelineRecord.Type.HeapAllocations;
}
startInstrumentation(initiatedByBackend)
{
// FIXME: Include a "track allocations" option for this instrument.
// FIXME: Include a periodic snapshot interval option for this instrument.
if (!initiatedByBackend)
HeapAgent.startTracking();
// Periodic snapshots.
const snapshotInterval = 10000;
this._snapshotIntervalIdentifier = setInterval(this._takeHeapSnapshot.bind(this), snapshotInterval);
}
stopInstrumentation(initiatedByBackend)
{
if (!initiatedByBackend)
HeapAgent.stopTracking();
window.clearInterval(this._snapshotIntervalIdentifier);
this._snapshotIntervalIdentifier = undefined;
}
// Private
_takeHeapSnapshot()
{
HeapAgent.snapshot(function(error, timestamp, snapshotStringData) {
let workerProxy = WebInspector.HeapSnapshotWorkerProxy.singleton();
workerProxy.createSnapshot(snapshotStringData, ({objectId, snapshot: serializedSnapshot}) => {
let snapshot = WebInspector.HeapSnapshotProxy.deserialize(objectId, serializedSnapshot);
WebInspector.timelineManager.heapSnapshotAdded(timestamp, snapshot);
});
});
}
};
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