blob: 73ee3f900f705e8edc599aed9bfc4f866282bed2 [file] [log] [blame]
/*
* 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.
*/
WI.HeapSnapshotWorkerProxy = class HeapSnapshotWorkerProxy extends WI.Object
{
constructor()
{
super();
this._heapSnapshotWorker = new Worker("Workers/HeapSnapshot/HeapSnapshotWorker.js");
this._heapSnapshotWorker.addEventListener("message", this._handleMessage.bind(this));
this._nextCallId = 1;
this._callbacks = new Map;
WI.Frame.addEventListener(WI.Frame.Event.MainResourceDidChange, this._mainResourceDidChange, this);
}
// Static
static singleton()
{
if (!HeapSnapshotWorkerProxy.instance)
HeapSnapshotWorkerProxy.instance = new HeapSnapshotWorkerProxy;
return HeapSnapshotWorkerProxy.instance;
}
// Actions
clearSnapshots(callback)
{
this.performAction("clearSnapshots", callback);
}
createSnapshot(snapshotStringData, callback)
{
this.performAction("createSnapshot", ...arguments);
}
createSnapshotDiff(objectId1, objectId2, callback)
{
this.performAction("createSnapshotDiff", ...arguments);
}
createImportedSnapshot(snapshotStringData, title, callback)
{
const imported = true;
this.performAction("createSnapshot", snapshotStringData, title, imported, callback);
}
// Public
performAction(actionName)
{
let callId = this._nextCallId++;
let callback = arguments[arguments.length - 1];
let actionArguments = Array.prototype.slice.call(arguments, 1, arguments.length - 1);
console.assert(typeof actionName === "string", "performAction should always have an actionName");
console.assert(typeof callback === "function", "performAction should always have a callback");
this._callbacks.set(callId, callback);
this._postMessage({callId, actionName, actionArguments});
}
callMethod(objectId, methodName)
{
let callId = this._nextCallId++;
let callback = arguments[arguments.length - 1];
let methodArguments = Array.prototype.slice.call(arguments, 2, arguments.length - 1);
console.assert(typeof objectId === "number", "callMethod should always have an objectId");
console.assert(typeof methodName === "string", "callMethod should always have a methodName");
console.assert(typeof callback === "function", "callMethod should always have a callback");
this._callbacks.set(callId, callback);
this._postMessage({callId, objectId, methodName, methodArguments});
}
// Private
_mainResourceDidChange(event)
{
if (!event.target.isMainFrame())
return;
this.clearSnapshots(() => {
WI.HeapSnapshotProxy.invalidateSnapshotProxies();
});
}
_postMessage()
{
this._heapSnapshotWorker.postMessage(...arguments);
}
_handleMessage(event)
{
let data = event.data;
// Error.
if (data.error) {
console.assert(data.callId);
this._callbacks.delete(data.callId);
return;
}
// Event.
if (data.eventName) {
this.dispatchEventToListeners(data.eventName, data.eventData);
return;
}
// Action or Method Response.
if (data.callId) {
let callback = this._callbacks.get(data.callId);
this._callbacks.delete(data.callId);
callback(data.result);
return;
}
console.error("Unexpected HeapSnapshotWorker message", data);
}
};
WI.HeapSnapshotWorkerProxy.Event = {
Collection: "heap-snapshot-collection",
};