gecko/toolkit/components/perf/PerfMeasurement.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* The Mozilla Foundation <http://www.mozilla.org/>.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Zack Weinberg <zweinberg@mozilla.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "PerfMeasurement.h"
#include "jsperf.h"
#include "mozilla/ModuleUtils.h"
#include "nsMemory.h"
#define JSPERF_CONTRACTID \
"@mozilla.org/jsperf;1"
#define JSPERF_CID \
{ 0x421c38e6, 0xaee0, 0x4509, \
{ 0xa0, 0x25, 0x13, 0x0f, 0x43, 0x78, 0x03, 0x5a } }
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namespace mozilla {
namespace jsperf {
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NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
NS_IMPL_ISUPPORTS1(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 JSBool
SealObjectAndPrototype(JSContext* cx, JSObject* parent, const char* name)
{
jsval prop;
if (!JS_GetProperty(cx, parent, name, &prop))
return false;
JSObject* obj = JSVAL_TO_OBJECT(prop);
if (!JS_GetProperty(cx, obj, "prototype", &prop))
return false;
JSObject* prototype = JSVAL_TO_OBJECT(prop);
return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
}
static JSBool
InitAndSealPerfMeasurementClass(JSContext* cx, 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,
PRUint32 argc,
jsval* argv,
jsval* vp,
PRBool* _retval)
{
JSObject* scope = JS_GetScopeChain(cx);
if (!scope)
return NS_ERROR_NOT_AVAILABLE;
JSObject* global = JS_GetGlobalForObject(cx, scope);
if (!global)
return NS_ERROR_NOT_AVAILABLE;
*_retval = InitAndSealPerfMeasurementClass(cx, global);
return NS_OK;
}
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}
}
NS_DEFINE_NAMED_CID(JSPERF_CID);
static const mozilla::Module::CIDEntry kPerfCIDs[] = {
{ &kJSPERF_CID, false, NULL, mozilla::jsperf::ModuleConstructor },
{ NULL }
};
static const mozilla::Module::ContractIDEntry kPerfContracts[] = {
{ JSPERF_CONTRACTID, &kJSPERF_CID },
{ NULL }
};
static const mozilla::Module kPerfModule = {
mozilla::Module::kVersion,
kPerfCIDs,
kPerfContracts
};
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NSMODULE_DEFN(jsperf) = &kPerfModule;