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6d47286458
Differential Revision: https://phabricator.services.mozilla.com/D18403 --HG-- extra : rebase_source : 9200029151b677261c0bb16e7d874d56c20f88dc extra : source : b9862758b98ccb95e90901258bcea159784c7483
74 lines
2.4 KiB
C++
74 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "PerfMeasurement.h"
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#include "jsperf.h"
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#include "nsMemory.h"
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#include "mozilla/Preferences.h"
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#include "mozJSComponentLoader.h"
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#include "nsZipArchive.h"
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#include "xpc_make_class.h"
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namespace mozilla {
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namespace jsperf {
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NS_IMPL_ISUPPORTS(Module, nsIXPCScriptable)
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Module::Module() = default;
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Module::~Module() = default;
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#define XPC_MAP_CLASSNAME Module
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#define XPC_MAP_QUOTED_CLASSNAME "Module"
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#define XPC_MAP_FLAGS XPC_SCRIPTABLE_WANT_CALL
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#include "xpc_map_end.h"
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static bool SealObjectAndPrototype(JSContext* cx, JS::Handle<JSObject*> parent,
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const char* name) {
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JS::Rooted<JS::Value> prop(cx);
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if (!JS_GetProperty(cx, parent, name, &prop)) return false;
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if (prop.isUndefined()) {
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// Pretend we sealed the object.
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return true;
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}
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JS::Rooted<JSObject*> obj(cx, prop.toObjectOrNull());
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if (!JS_GetProperty(cx, obj, "prototype", &prop)) return false;
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JS::Rooted<JSObject*> prototype(cx, prop.toObjectOrNull());
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return JS_FreezeObject(cx, obj) && JS_FreezeObject(cx, prototype);
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}
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static bool InitAndSealPerfMeasurementClass(JSContext* cx,
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JS::Handle<JSObject*> global) {
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// Init the PerfMeasurement class
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if (!JS::RegisterPerfMeasurement(cx, global)) return false;
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// Seal up Object, Function, and Array and their prototypes. (This single
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// object instance is shared amongst everyone who imports the jsperf module.)
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if (!SealObjectAndPrototype(cx, global, "Object") ||
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!SealObjectAndPrototype(cx, global, "Function") ||
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!SealObjectAndPrototype(cx, global, "Array"))
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return false;
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// Finally, seal the global object, for good measure. (But not recursively;
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// this breaks things.)
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return JS_FreezeObject(cx, global);
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}
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NS_IMETHODIMP
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Module::Call(nsIXPConnectWrappedNative* wrapper, JSContext* cx, JSObject* obj,
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const JS::CallArgs& args, bool* _retval) {
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mozJSComponentLoader* loader = mozJSComponentLoader::Get();
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JS::Rooted<JSObject*> targetObj(cx);
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loader->FindTargetObject(cx, &targetObj);
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*_retval = InitAndSealPerfMeasurementClass(cx, targetObj);
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return NS_OK;
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}
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} // namespace jsperf
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} // namespace mozilla
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