The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/toolkit/components/perf/PerfMeasurement.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,119 @@
     1.4 +/* -*-  Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
     1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
     1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
     1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
     1.8 +
     1.9 +#include "PerfMeasurement.h"
    1.10 +#include "jsperf.h"
    1.11 +#include "mozilla/ModuleUtils.h"
    1.12 +#include "nsMemory.h"
    1.13 +#include "mozilla/Preferences.h"
    1.14 +#include "mozJSComponentLoader.h"
    1.15 +#include "nsZipArchive.h"
    1.16 +
    1.17 +#define JSPERF_CONTRACTID \
    1.18 +  "@mozilla.org/jsperf;1"
    1.19 +
    1.20 +#define JSPERF_CID            \
    1.21 +{ 0x421c38e6, 0xaee0, 0x4509, \
    1.22 +  { 0xa0, 0x25, 0x13, 0x0f, 0x43, 0x78, 0x03, 0x5a } }
    1.23 +
    1.24 +namespace mozilla {
    1.25 +namespace jsperf {
    1.26 +
    1.27 +NS_GENERIC_FACTORY_CONSTRUCTOR(Module)
    1.28 +
    1.29 +NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
    1.30 +
    1.31 +Module::Module()
    1.32 +{
    1.33 +}
    1.34 +
    1.35 +Module::~Module()
    1.36 +{
    1.37 +}
    1.38 +
    1.39 +#define XPC_MAP_CLASSNAME Module
    1.40 +#define XPC_MAP_QUOTED_CLASSNAME "Module"
    1.41 +#define XPC_MAP_WANT_CALL
    1.42 +#define XPC_MAP_FLAGS nsIXPCScriptable::WANT_CALL
    1.43 +#include "xpc_map_end.h"
    1.44 +
    1.45 +static bool
    1.46 +SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject *> parent, const char* name)
    1.47 +{
    1.48 +  JS::Rooted<JS::Value> prop(cx);
    1.49 +  if (!JS_GetProperty(cx, parent, name, &prop))
    1.50 +    return false;
    1.51 +
    1.52 +  if (prop.isUndefined()) {
    1.53 +    // Pretend we sealed the object.
    1.54 +    return true;
    1.55 +  }
    1.56 +
    1.57 +  JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
    1.58 +  if (!JS_GetProperty(cx, obj, "prototype", &prop))
    1.59 +    return false;
    1.60 +
    1.61 +  JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
    1.62 +  return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
    1.63 +}
    1.64 +
    1.65 +static bool
    1.66 +InitAndSealPerfMeasurementClass(JSContext* cx, JS::Handle<JSObject*> global)
    1.67 +{
    1.68 +  // Init the PerfMeasurement class
    1.69 +  if (!JS::RegisterPerfMeasurement(cx, global))
    1.70 +    return false;
    1.71 +
    1.72 +  // Seal up Object, Function, and Array and their prototypes.  (This single
    1.73 +  // object instance is shared amongst everyone who imports the jsperf module.)
    1.74 +  if (!SealObjectAndPrototype(cx, global, "Object") ||
    1.75 +      !SealObjectAndPrototype(cx, global, "Function") ||
    1.76 +      !SealObjectAndPrototype(cx, global, "Array"))
    1.77 +    return false;
    1.78 +
    1.79 +  // Finally, seal the global object, for good measure. (But not recursively;
    1.80 +  // this breaks things.)
    1.81 +  return JS_FreezeObject(cx, global);
    1.82 +}
    1.83 +
    1.84 +NS_IMETHODIMP
    1.85 +Module::Call(nsIXPConnectWrappedNative* wrapper,
    1.86 +             JSContext* cx,
    1.87 +             JSObject* obj,
    1.88 +             const JS::CallArgs& args,
    1.89 +             bool* _retval)
    1.90 +{
    1.91 +
    1.92 +  mozJSComponentLoader* loader = mozJSComponentLoader::Get();
    1.93 +  JS::Rooted<JSObject*> targetObj(cx);
    1.94 +  nsresult rv = loader->FindTargetObject(cx, &targetObj);
    1.95 +  NS_ENSURE_SUCCESS(rv, rv);
    1.96 +
    1.97 +  *_retval = InitAndSealPerfMeasurementClass(cx, targetObj);
    1.98 +  return NS_OK;
    1.99 +}
   1.100 +
   1.101 +}
   1.102 +}
   1.103 +
   1.104 +NS_DEFINE_NAMED_CID(JSPERF_CID);
   1.105 +
   1.106 +static const mozilla::Module::CIDEntry kPerfCIDs[] = {
   1.107 +  { &kJSPERF_CID, false, nullptr, mozilla::jsperf::ModuleConstructor },
   1.108 +  { nullptr }
   1.109 +};
   1.110 +
   1.111 +static const mozilla::Module::ContractIDEntry kPerfContracts[] = {
   1.112 +  { JSPERF_CONTRACTID, &kJSPERF_CID },
   1.113 +  { nullptr }
   1.114 +};
   1.115 +
   1.116 +static const mozilla::Module kPerfModule = {
   1.117 +  mozilla::Module::kVersion,
   1.118 +  kPerfCIDs,
   1.119 +  kPerfContracts
   1.120 +};
   1.121 +
   1.122 +NSMODULE_DEFN(jsperf) = &kPerfModule;