From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- devtools/server/actors/heap-snapshot-file.js | 72 ++++++++++++++++++++++++++++ 1 file changed, 72 insertions(+) create mode 100644 devtools/server/actors/heap-snapshot-file.js (limited to 'devtools/server/actors/heap-snapshot-file.js') diff --git a/devtools/server/actors/heap-snapshot-file.js b/devtools/server/actors/heap-snapshot-file.js new file mode 100644 index 0000000000..f3fd9242b2 --- /dev/null +++ b/devtools/server/actors/heap-snapshot-file.js @@ -0,0 +1,72 @@ +/* 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 { Actor } = require("resource://devtools/shared/protocol.js"); +const { + heapSnapshotFileSpec, +} = require("resource://devtools/shared/specs/heap-snapshot-file.js"); + +loader.lazyRequireGetter( + this, + "DevToolsUtils", + "resource://devtools/shared/DevToolsUtils.js" +); +loader.lazyRequireGetter( + this, + "HeapSnapshotFileUtils", + "resource://devtools/shared/heapsnapshot/HeapSnapshotFileUtils.js" +); + +/** + * The HeapSnapshotFileActor handles transferring heap snapshot files from the + * server to the client. This has to be a global actor in the parent process + * because child processes are sandboxed and do not have access to the file + * system. + */ +exports.HeapSnapshotFileActor = class HeapSnapshotFileActor extends Actor { + constructor(conn, parent) { + super(conn, heapSnapshotFileSpec); + + if ( + Services.appinfo.processType !== Services.appinfo.PROCESS_TYPE_DEFAULT + ) { + const err = new Error( + "Attempt to create a HeapSnapshotFileActor in a " + + "child process! The HeapSnapshotFileActor *MUST* " + + "be in the parent process!" + ); + DevToolsUtils.reportException("HeapSnapshotFileActor's constructor", err); + } + } + + /** + * @see MemoryFront.prototype.transferHeapSnapshot + */ + async transferHeapSnapshot(snapshotId) { + const snapshotFilePath = + HeapSnapshotFileUtils.getHeapSnapshotTempFilePath(snapshotId); + if (!snapshotFilePath) { + throw new Error(`No heap snapshot with id: ${snapshotId}`); + } + + const streamPromise = DevToolsUtils.openFileStream(snapshotFilePath); + + const { size } = await IOUtils.stat(snapshotFilePath); + const bulkPromise = this.conn.startBulkSend({ + actor: this.actorID, + type: "heap-snapshot", + length: size, + }); + + const [bulk, stream] = await Promise.all([bulkPromise, streamPromise]); + + try { + await bulk.copyFrom(stream); + } finally { + stream.close(); + } + } +}; -- cgit v1.2.3