Source code

Revision control

Other Tools

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "xpcprivate.h"
#include "XPCWrapper.h"
#include "WrapperFactory.h"
#include "AccessCheck.h"
#include "js/PropertyAndElement.h" // JS_DefineFunction
using namespace xpc;
using namespace mozilla;
using namespace JS;
namespace XPCNativeWrapper {
static inline bool ThrowException(nsresult ex, JSContext* cx) {
XPCThrower::Throw(ex, cx);
return false;
}
static bool UnwrapNW(JSContext* cx, unsigned argc, Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
if (args.length() != 1) {
return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
}
JS::RootedValue v(cx, args[0]);
if (!v.isObject() || !js::IsCrossCompartmentWrapper(&v.toObject()) ||
!WrapperFactory::AllowWaiver(&v.toObject())) {
args.rval().set(v);
return true;
}
bool ok = xpc::WrapperFactory::WaiveXrayAndWrap(cx, &v);
NS_ENSURE_TRUE(ok, false);
args.rval().set(v);
return true;
}
static bool XrayWrapperConstructor(JSContext* cx, unsigned argc, Value* vp) {
JS::CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
return ThrowException(NS_ERROR_XPC_NOT_ENOUGH_ARGS, cx);
}
if (!args[0].isObject()) {
args.rval().set(args[0]);
return true;
}
args.rval().setObject(*js::UncheckedUnwrap(&args[0].toObject()));
return JS_WrapValue(cx, args.rval());
}
// static
bool AttachNewConstructorObject(JSContext* aCx,
JS::HandleObject aGlobalObject) {
JSAutoRealm ar(aCx, aGlobalObject);
JSFunction* xpcnativewrapper = JS_DefineFunction(
aCx, aGlobalObject, "XPCNativeWrapper", XrayWrapperConstructor, 1,
JSPROP_READONLY | JSPROP_PERMANENT | JSFUN_CONSTRUCTOR);
if (!xpcnativewrapper) {
return false;
}
JS::RootedObject obj(aCx, JS_GetFunctionObject(xpcnativewrapper));
return JS_DefineFunction(aCx, obj, "unwrap", UnwrapNW, 1,
JSPROP_READONLY | JSPROP_PERMANENT) != nullptr;
}
} // namespace XPCNativeWrapper
namespace XPCWrapper {
JSObject* UnsafeUnwrapSecurityWrapper(JSObject* obj) {
if (js::IsProxy(obj)) {
return js::UncheckedUnwrap(obj);
}
return obj;
}
} // namespace XPCWrapper