1 files changed, 90 insertions, 0 deletions
diff --git a/devtools/server/actors/memory.js b/devtools/server/actors/memory.js
new file mode 100644
index 0000000000..482596ed4a
--- /dev/null
+++ b/devtools/server/actors/memory.js
@@ -0,0 +1,90 @@
+/* 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 { memorySpec } = require("resource://devtools/shared/specs/memory.js");
+
+const { Memory } = require("resource://devtools/server/performance/memory.js");
+const {
+  actorBridgeWithSpec,
+} = require("resource://devtools/server/actors/common.js");
+
+loader.lazyRequireGetter(
+  this,
+  "StackFrameCache",
+  "resource://devtools/server/actors/utils/stack.js",
+  true
+);
+
+/**
+ * An actor that returns memory usage data for its parent actor's window.
+ * A target-scoped instance of this actor will measure the memory footprint of
+ * the target, such as a tab. A global-scoped instance however, will measure the memory
+ * footprint of the chrome window referenced by the root actor.
+ *
+ * This actor wraps the Memory module at devtools/server/performance/memory.js
+ * and provides RDP definitions.
+ *
+ * @see devtools/server/performance/memory.js for documentation.
+ */
+exports.MemoryActor = class MemoryActor extends Actor {
+  constructor(conn, parent, frameCache = new StackFrameCache()) {
+    super(conn, memorySpec);
+
+    this._onGarbageCollection = this._onGarbageCollection.bind(this);
+    this._onAllocations = this._onAllocations.bind(this);
+    this.bridge = new Memory(parent, frameCache);
+    this.bridge.on("garbage-collection", this._onGarbageCollection);
+    this.bridge.on("allocations", this._onAllocations);
+  }
+
+  destroy() {
+    this.bridge.off("garbage-collection", this._onGarbageCollection);
+    this.bridge.off("allocations", this._onAllocations);
+    this.bridge.destroy();
+    super.destroy();
+  }
+
+  attach = actorBridgeWithSpec("attach");
+
+  detach = actorBridgeWithSpec("detach");
+
+  getState = actorBridgeWithSpec("getState");
+
+  saveHeapSnapshot(boundaries) {
+    return this.bridge.saveHeapSnapshot(boundaries);
+  }
+
+  takeCensus = actorBridgeWithSpec("takeCensus");
+
+  startRecordingAllocations = actorBridgeWithSpec("startRecordingAllocations");
+
+  stopRecordingAllocations = actorBridgeWithSpec("stopRecordingAllocations");
+
+  getAllocationsSettings = actorBridgeWithSpec("getAllocationsSettings");
+
+  getAllocations = actorBridgeWithSpec("getAllocations");
+
+  forceGarbageCollection = actorBridgeWithSpec("forceGarbageCollection");
+
+  forceCycleCollection = actorBridgeWithSpec("forceCycleCollection");
+
+  measure = actorBridgeWithSpec("measure");
+
+  residentUnique = actorBridgeWithSpec("residentUnique");
+
+  _onGarbageCollection(data) {
+    if (this.conn.transport) {
+      this.emit("garbage-collection", data);
+    }
+  }
+
+  _onAllocations(data) {
+    if (this.conn.transport) {
+      this.emit("allocations", data);
+    }
+  }
+};