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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 19:33:14 +0000
commit36d22d82aa202bb199967e9512281e9a53db42c9 (patch)
tree105e8c98ddea1c1e4784a60a5a6410fa416be2de /devtools/server/actors/heap-snapshot-file.js
parentInitial commit. (diff)
downloadfirefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz
firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip
Adding upstream version 115.7.0esr.upstream/115.7.0esr
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'devtools/server/actors/heap-snapshot-file.js')
-rw-r--r--devtools/server/actors/heap-snapshot-file.js72
1 files changed, 72 insertions, 0 deletions
diff --git a/devtools/server/actors/heap-snapshot-file.js b/devtools/server/actors/heap-snapshot-file.js
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+++ b/devtools/server/actors/heap-snapshot-file.js
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+/* 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();
+ }
+ }
+};