Andrew Zambazos
128 lines
4.1 KiB
JavaScript
128 lines
4.1 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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importScripts(...[
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"HeapSnapshot.js"
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]);
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HeapSnapshotWorker = class HeapSnapshotWorker
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{
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constructor()
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{
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this._nextObjectId = 1;
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this._objects = new Map;
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this._snapshots = [];
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self.addEventListener("message", this._handleMessage.bind(this));
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}
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// Actions
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clearSnapshots()
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{
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this._objects.clear();
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this._snapshots = [];
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}
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createSnapshot(snapshotString, title, imported)
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{
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let objectId = this._nextObjectId++;
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let snapshot = new HeapSnapshot(objectId, snapshotString, title, imported);
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this._objects.set(objectId, snapshot);
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if (!imported) {
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this._snapshots.push(snapshot);
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if (this._snapshots.length > 1) {
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setTimeout(() => {
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let collectionData = snapshot.updateDeadNodesAndGatherCollectionData(this._snapshots);
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if (!collectionData || !collectionData.affectedSnapshots.length)
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return;
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this.sendEvent(HeapSnapshotWorker.Event.Collection, collectionData);
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}, 0);
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}
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}
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return {objectId, snapshot: snapshot.serialize()};
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}
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createSnapshotDiff(objectId1, objectId2)
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{
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let snapshot1 = this._objects.get(objectId1);
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let snapshot2 = this._objects.get(objectId2);
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console.assert(snapshot1 instanceof HeapSnapshot);
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console.assert(snapshot2 instanceof HeapSnapshot);
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let objectId = this._nextObjectId++;
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let snapshotDiff = new HeapSnapshotDiff(objectId, snapshot1, snapshot2);
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this._objects.set(objectId, snapshotDiff);
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return {objectId, snapshotDiff: snapshotDiff.serialize()};
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}
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// Public
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sendEvent(eventName, eventData)
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{
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self.postMessage({eventName, eventData});
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}
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// Private
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_handleMessage(event)
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{
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let data = event.data;
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// Action.
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if (data.actionName) {
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let result = this[data.actionName](...data.actionArguments);
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self.postMessage({callId: data.callId, result});
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return;
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}
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// Method.
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if (data.methodName) {
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console.assert(data.objectId, "Must have an objectId to call the method on");
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let object = this._objects.get(data.objectId);
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if (!object)
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self.postMessage({callId: data.callId, error: "No such object."});
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else {
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let result = object[data.methodName](...data.methodArguments);
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self.postMessage({callId: data.callId, result});
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}
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return;
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}
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console.error("Unexpected HeapSnapshotWorker message", data);
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}
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};
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HeapSnapshotWorker.Event = {
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Collection: "heap-snapshot-collection",
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};
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self.heapSnapshotWorker = new HeapSnapshotWorker;
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