mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-25 19:25:43 +00:00
97828fce1d
MozReview-Commit-ID: 9ysAeaBMNVt
93 lines
3.2 KiB
JavaScript
93 lines
3.2 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
"use strict";
|
|
|
|
const { memorySpec } = require("devtools/shared/specs/memory");
|
|
const { Task } = require("devtools/shared/task");
|
|
const protocol = require("devtools/shared/protocol");
|
|
|
|
loader.lazyRequireGetter(this, "FileUtils",
|
|
"resource://gre/modules/FileUtils.jsm", true);
|
|
loader.lazyRequireGetter(this, "HeapSnapshotFileUtils",
|
|
"devtools/shared/heapsnapshot/HeapSnapshotFileUtils");
|
|
|
|
const MemoryFront = protocol.FrontClassWithSpec(memorySpec, {
|
|
initialize: function (client, form, rootForm = null) {
|
|
protocol.Front.prototype.initialize.call(this, client, form);
|
|
this._client = client;
|
|
this.actorID = form.memoryActor;
|
|
this.heapSnapshotFileActorID = rootForm
|
|
? rootForm.heapSnapshotFileActor
|
|
: null;
|
|
this.manage(this);
|
|
},
|
|
|
|
/**
|
|
* Save a heap snapshot, transfer it from the server to the client if the
|
|
* server and client do not share a file system, and return the local file
|
|
* path to the heap snapshot.
|
|
*
|
|
* Note that this is safe to call for actors inside sandoxed child processes,
|
|
* as we jump through the correct IPDL hoops.
|
|
*
|
|
* @params Boolean options.forceCopy
|
|
* Always force a bulk data copy of the saved heap snapshot, even when
|
|
* the server and client share a file system.
|
|
*
|
|
* @params {Object|undefined} options.boundaries
|
|
* The boundaries for the heap snapshot. See
|
|
* ChromeUtils.webidl for more details.
|
|
*
|
|
* @returns Promise<String>
|
|
*/
|
|
saveHeapSnapshot: protocol.custom(Task.async(function* (options = {}) {
|
|
const snapshotId = yield this._saveHeapSnapshotImpl(options.boundaries);
|
|
|
|
if (!options.forceCopy &&
|
|
(yield HeapSnapshotFileUtils.haveHeapSnapshotTempFile(snapshotId))) {
|
|
return HeapSnapshotFileUtils.getHeapSnapshotTempFilePath(snapshotId);
|
|
}
|
|
|
|
return yield this.transferHeapSnapshot(snapshotId);
|
|
}), {
|
|
impl: "_saveHeapSnapshotImpl"
|
|
}),
|
|
|
|
/**
|
|
* Given that we have taken a heap snapshot with the given id, transfer the
|
|
* heap snapshot file to the client. The path to the client's local file is
|
|
* returned.
|
|
*
|
|
* @param {String} snapshotId
|
|
*
|
|
* @returns Promise<String>
|
|
*/
|
|
transferHeapSnapshot: protocol.custom(function (snapshotId) {
|
|
if (!this.heapSnapshotFileActorID) {
|
|
throw new Error("MemoryFront initialized without a rootForm");
|
|
}
|
|
|
|
const request = this._client.request({
|
|
to: this.heapSnapshotFileActorID,
|
|
type: "transferHeapSnapshot",
|
|
snapshotId
|
|
});
|
|
|
|
return new Promise((resolve, reject) => {
|
|
const outFilePath =
|
|
HeapSnapshotFileUtils.getNewUniqueHeapSnapshotTempFilePath();
|
|
const outFile = new FileUtils.File(outFilePath);
|
|
|
|
const outFileStream = FileUtils.openSafeFileOutputStream(outFile);
|
|
request.on("bulk-reply", Task.async(function* ({ copyTo }) {
|
|
yield copyTo(outFileStream);
|
|
FileUtils.closeSafeFileOutputStream(outFileStream);
|
|
resolve(outFilePath);
|
|
}));
|
|
});
|
|
})
|
|
});
|
|
|
|
exports.MemoryFront = MemoryFront;
|