/* -*-  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() = default;

Module::~Module() = default;

#define XPC_MAP_CLASSNAME Module

#define XPC_MAP_QUOTED_CLASSNAME "Module"

#define XPC_MAP_FLAGS XPC_SCRIPTABLE_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);

  loader->FindTargetObject(cx, &targetObj);

  *_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;