1 files changed, 86 insertions, 0 deletions
diff --git a/Source/WebInspectorUI/UserInterface/Models/HeapAllocationsInstrument.js b/Source/WebInspectorUI/UserInterface/Models/HeapAllocationsInstrument.js
new file mode 100644
index 000000000..f35c18408
--- /dev/null
+++ b/Source/WebInspectorUI/UserInterface/Models/HeapAllocationsInstrument.js
@@ -0,0 +1,86 @@
+/*
+ * 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.
+ */
+
+WebInspector.HeapAllocationsInstrument = class HeapAllocationsInstrument extends WebInspector.Instrument
+{
+    constructor()
+    {
+        super();
+
+        console.assert(WebInspector.HeapAllocationsInstrument.supported());
+
+        this._snapshotIntervalIdentifier = undefined;
+    }
+
+    // Static
+
+    static supported()
+    {
+        // COMPATIBILITY (iOS 9): HeapAgent did not exist.
+        return window.HeapAgent;
+    }
+
+    // Protected
+
+    get timelineRecordType()
+    {
+        return WebInspector.TimelineRecord.Type.HeapAllocations;
+    }
+
+    startInstrumentation(initiatedByBackend)
+    {
+        // FIXME: Include a "track allocations" option for this instrument.
+        // FIXME: Include a periodic snapshot interval option for this instrument.
+
+        if (!initiatedByBackend)
+            HeapAgent.startTracking();
+
+        // Periodic snapshots.
+        const snapshotInterval = 10000;
+        this._snapshotIntervalIdentifier = setInterval(this._takeHeapSnapshot.bind(this), snapshotInterval);
+    }
+
+    stopInstrumentation(initiatedByBackend)
+    {
+        if (!initiatedByBackend)
+            HeapAgent.stopTracking();
+
+        window.clearInterval(this._snapshotIntervalIdentifier);
+        this._snapshotIntervalIdentifier = undefined;
+    }
+
+    // Private
+
+    _takeHeapSnapshot()
+    {
+        HeapAgent.snapshot(function(error, timestamp, snapshotStringData) {
+            let workerProxy = WebInspector.HeapSnapshotWorkerProxy.singleton();
+            workerProxy.createSnapshot(snapshotStringData, ({objectId, snapshot: serializedSnapshot}) => {
+                let snapshot = WebInspector.HeapSnapshotProxy.deserialize(objectId, serializedSnapshot);
+                WebInspector.timelineManager.heapSnapshotAdded(timestamp, snapshot);
+            });
+        });
+    }
+};