7 files changed, 248 insertions, 0 deletions
diff --git a/toolkit/components/perf/.eslintrc.js b/toolkit/components/perf/.eslintrc.js
new file mode 100644
index 000000000..4e6d4bcf0
--- /dev/null
+++ b/toolkit/components/perf/.eslintrc.js
@@ -0,0 +1,7 @@
+"use strict";
+
+module.exports = {
+  "extends": [
+    "../../../testing/mochitest/chrome.eslintrc.js"
+  ]
+};
diff --git a/toolkit/components/perf/PerfMeasurement.cpp b/toolkit/components/perf/PerfMeasurement.cpp
new file mode 100644
index 000000000..1b211b79c
--- /dev/null
+++ b/toolkit/components/perf/PerfMeasurement.cpp
@@ -0,0 +1,120 @@
+/* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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/. */
+
+#include "PerfMeasurement.h"
+#include "jsperf.h"
+#include "mozilla/ModuleUtils.h"
+#include "nsMemory.h"
+#include "mozilla/Preferences.h"
+#include "mozJSComponentLoader.h"
+#include "nsZipArchive.h"
+#include "xpc_make_class.h"
+
+#define JSPERF_CONTRACTID \
+  "@mozilla.org/jsperf;1"
+
+#define JSPERF_CID            \
+{ 0x421c38e6, 0xaee0, 0x4509, \
+  { 0xa0, 0x25, 0x13, 0x0f, 0x43, 0x78, 0x03, 0x5a } }
+
+namespace mozilla {
+namespace jsperf {
+
+NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
+
+NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
+
+Module::Module()
+{
+}
+
+Module::~Module()
+{
+}
+
+#define XPC_MAP_CLASSNAME Module
+#define XPC_MAP_QUOTED_CLASSNAME "Module"
+#define XPC_MAP_WANT_CALL
+#define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
+#include "xpc_map_end.h"
+
+static bool
+SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject *> parent, const char* name)
+{
+  JS::Rooted<JS::Value> prop(cx);
+  if (!JS_GetProperty(cx, parent, name, &prop))
+    return false;
+
+  if (prop.isUndefined()) {
+    // Pretend we sealed the object.
+    return true;
+  }
+
+  JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
+  if (!JS_GetProperty(cx, obj, "prototype", &prop))
+    return false;
+
+  JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
+  return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
+}
+
+static bool
+InitAndSealPerfMeasurementClass(JSContext* cx, JS::Handle<JSObject*> global)
+{
+  // Init the PerfMeasurement class
+  if (!JS::RegisterPerfMeasurement(cx, global))
+    return false;
+
+  // Seal up Object, Function, and Array and their prototypes.  (This single
+  // object instance is shared amongst everyone who imports the jsperf module.)
+  if (!SealObjectAndPrototype(cx, global, "Object") ||
+      !SealObjectAndPrototype(cx, global, "Function") ||
+      !SealObjectAndPrototype(cx, global, "Array"))
+    return false;
+
+  // Finally, seal the global object, for good measure. (But not recursively;
+  // this breaks things.)
+  return JS_FreezeObject(cx, global);
+}
+
+NS_IMETHODIMP
+Module::Call(nsIXPConnectWrappedNative* wrapper,
+             JSContext* cx,
+             JSObject* obj,
+             const JS::CallArgs& args,
+             bool* _retval)
+{
+
+  mozJSComponentLoader* loader = mozJSComponentLoader::Get();
+  JS::Rooted<JSObject*> targetObj(cx);
+  nsresult rv = loader->FindTargetObject(cx, &targetObj);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  *_retval = InitAndSealPerfMeasurementClass(cx, targetObj);
+  return NS_OK;
+}
+
+} // namespace jsperf
+} // namespace mozilla
+
+NS_DEFINE_NAMED_CID(JSPERF_CID);
+
+static const mozilla::Module::CIDEntry kPerfCIDs[] = {
+  { &kJSPERF_CID, false, nullptr, mozilla::jsperf::ModuleConstructor },
+  { nullptr }
+};
+
+static const mozilla::Module::ContractIDEntry kPerfContracts[] = {
+  { JSPERF_CONTRACTID, &kJSPERF_CID },
+  { nullptr }
+};
+
+static const mozilla::Module kPerfModule = {
+  mozilla::Module::kVersion,
+  kPerfCIDs,
+  kPerfContracts
+};
+
+NSMODULE_DEFN(jsperf) = &kPerfModule;
diff --git a/toolkit/components/perf/PerfMeasurement.h b/toolkit/components/perf/PerfMeasurement.h
new file mode 100644
index 000000000..b158d1685
--- /dev/null
+++ b/toolkit/components/perf/PerfMeasurement.h
@@ -0,0 +1,30 @@
+/* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
+/* 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/. */
+
+#ifndef COMPONENTS_PERFMEASUREMENT_H
+#define COMPONENTS_PERFMEASUREMENT_H
+
+#include "nsIXPCScriptable.h"
+#include "mozilla/Attributes.h"
+
+namespace mozilla {
+namespace jsperf {
+
+class Module final : public nsIXPCScriptable
+{
+public:
+  NS_DECL_ISUPPORTS
+  NS_DECL_NSIXPCSCRIPTABLE
+
+  Module();
+
+private:
+  ~Module();
+};
+
+} // namespace jsperf
+} // namespace mozilla
+
+#endif
diff --git a/toolkit/components/perf/PerfMeasurement.jsm b/toolkit/components/perf/PerfMeasurement.jsm
new file mode 100644
index 000000000..29a221c6f
--- /dev/null
+++ b/toolkit/components/perf/PerfMeasurement.jsm
@@ -0,0 +1,19 @@
+/* -*-  indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* 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/. */
+
+this.EXPORTED_SYMBOLS = [ "PerfMeasurement" ];
+
+/*
+ * This is the js module for jsperf. Import it like so:
+ *   Components.utils.import("resource://gre/modules/PerfMeasurement.jsm");
+ *
+ * This will create a 'PerfMeasurement' class.  Instances of this class can
+ * be used to benchmark browser operations.
+ *
+ * For documentation on the API, see js/src/perf/jsperf.h.
+ *
+ */
+
+Components.classes["@mozilla.org/jsperf;1"].createInstance()();
diff --git a/toolkit/components/perf/chrome.ini b/toolkit/components/perf/chrome.ini
new file mode 100644
index 000000000..eaa3c2401
--- /dev/null
+++ b/toolkit/components/perf/chrome.ini
@@ -0,0 +1,3 @@
+[DEFAULT]
+
+[test_pm.xul]
diff --git a/toolkit/components/perf/moz.build b/toolkit/components/perf/moz.build
new file mode 100644
index 000000000..d153244c5
--- /dev/null
+++ b/toolkit/components/perf/moz.build
@@ -0,0 +1,21 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+SOURCES += [
+    'PerfMeasurement.cpp',
+]
+
+EXTRA_JS_MODULES += [
+    'PerfMeasurement.jsm',
+]
+
+FINAL_LIBRARY = 'xul'
+
+LOCAL_INCLUDES += [
+    '/js/xpconnect/loader',
+]
+
+MOCHITEST_CHROME_MANIFESTS += ['chrome.ini']
diff --git a/toolkit/components/perf/test_pm.xul b/toolkit/components/perf/test_pm.xul
new file mode 100644
index 000000000..7dbf27b92
--- /dev/null
+++ b/toolkit/components/perf/test_pm.xul
@@ -0,0 +1,48 @@
+<?xml version="1.0"?>
+<!-- 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/. -->
+
+<window title="Performance measurement tests"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="test()">
+
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+  <script type="application/javascript"
+          src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>
+
+  <script type="application/javascript"><![CDATA[
+function test()
+{
+  SimpleTest.waitForExplicitFinish();
+
+  Components.utils.import("resource://gre/modules/PerfMeasurement.jsm");
+  let pm = new PerfMeasurement(PerfMeasurement.ALL);
+  if (pm.eventsMeasured == 0) {
+    todo(false, "stub, skipping test");
+  } else {
+    pm.start();
+    for (let i = 0; i < 10000; i++) ;
+      pm.stop();
+
+    events = ["cpu_cycles", "instructions", "cache_references", "cache_misses",
+              "branch_instructions", "branch_misses", "bus_cycles", "page_faults",
+              "major_page_faults", "context_switches", "cpu_migrations"];
+
+    for (var i = 0; i < events.length; i++) {
+        var e = events[i];
+        ((pm.eventsMeasured & PerfMeasurement[e.toUpperCase()]) ? isnot : todo_is)(pm[e], -1, e);
+    }
+  }
+  SimpleTest.finish();
+}
+]]></script>
+
+  <body xmlns="http://www.w3.org/1999/xhtml">
+    <p id="display"></p>
+    <div id="content" style="display:none;"></div>
+    <pre id="test"></pre>
+  </body>
+  <label id="test-result"/>
+</window>