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/* -*- 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 "proxy/DeadObjectProxy.h"
#include "jsapi.h"
#include "js/friend/ErrorMessages.h" // js::GetErrorMessage, JSMSG_*
#include "vm/JSFunction.h" // XXXefaust Bug 1064662
#include "vm/ProxyObject.h"
using namespace js;
const DeadObjectProxy DeadObjectProxy::singleton;
const char DeadObjectProxy::family = 0;
static void ReportDead(JSContext* cx) {
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_DEAD_OBJECT);
}
bool DeadObjectProxy::getOwnPropertyDescriptor(
JSContext* cx, HandleObject wrapper, HandleId id,
MutableHandle<PropertyDescriptor> desc) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::defineProperty(JSContext* cx, HandleObject wrapper,
HandleId id,
Handle<PropertyDescriptor> desc,
ObjectOpResult& result) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::ownPropertyKeys(JSContext* cx, HandleObject wrapper,
MutableHandleIdVector props) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::delete_(JSContext* cx, HandleObject wrapper, HandleId id,
ObjectOpResult& result) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::getPrototype(JSContext* cx, HandleObject proxy,
MutableHandleObject protop) const {
protop.set(nullptr);
return true;
}
bool DeadObjectProxy::getPrototypeIfOrdinary(JSContext* cx, HandleObject proxy,
bool* isOrdinary,
MutableHandleObject protop) const {
*isOrdinary = false;
return true;
}
bool DeadObjectProxy::preventExtensions(JSContext* cx, HandleObject proxy,
ObjectOpResult& result) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::isExtensible(JSContext* cx, HandleObject proxy,
bool* extensible) const {
// This is kind of meaningless, but dead-object semantics aside,
// [[Extensible]] always being true is consistent with other proxy types.
*extensible = true;
return true;
}
bool DeadObjectProxy::call(JSContext* cx, HandleObject wrapper,
const CallArgs& args) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::construct(JSContext* cx, HandleObject wrapper,
const CallArgs& args) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::nativeCall(JSContext* cx, IsAcceptableThis test,
NativeImpl impl, const CallArgs& args) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::hasInstance(JSContext* cx, HandleObject proxy,
MutableHandleValue v, bool* bp) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::getBuiltinClass(JSContext* cx, HandleObject proxy,
ESClass* cls) const {
ReportDead(cx);
return false;
}
bool DeadObjectProxy::isArray(JSContext* cx, HandleObject obj,
JS::IsArrayAnswer* answer) const {
ReportDead(cx);
return false;
}
const char* DeadObjectProxy::className(JSContext* cx,
HandleObject wrapper) const {
return "DeadObject";
}
JSString* DeadObjectProxy::fun_toString(JSContext* cx, HandleObject proxy,
bool isToSource) const {
ReportDead(cx);
return nullptr;
}
RegExpShared* DeadObjectProxy::regexp_toShared(JSContext* cx,
HandleObject proxy) const {
ReportDead(cx);
return nullptr;
}
bool js::IsDeadProxyObject(JSObject* obj) {
return IsDerivedProxyObject(obj, &DeadObjectProxy::singleton);
}
Value js::DeadProxyTargetValue(ProxyObject* obj) {
// When nuking scripted proxies, isCallable and isConstructor values for
// the proxy needs to be preserved. So does background-finalization status.
int32_t flags = 0;
if (obj->handler()->isCallable(obj)) {
flags |= DeadObjectProxyIsCallable;
}
if (obj->handler()->isConstructor(obj)) {
flags |= DeadObjectProxyIsConstructor;
}
if (obj->handler()->finalizeInBackground(obj->private_())) {
flags |= DeadObjectProxyIsBackgroundFinalized;
}
return Int32Value(flags);
}
JSObject* js::NewDeadProxyObject(JSContext* cx, JSObject* origObj) {
MOZ_ASSERT_IF(origObj, origObj->is<ProxyObject>());
RootedValue target(cx);
if (origObj && origObj->is<ProxyObject>()) {
target = DeadProxyTargetValue(&origObj->as<ProxyObject>());
} else {
target = Int32Value(DeadObjectProxyIsBackgroundFinalized);
}
return NewProxyObject(cx, &DeadObjectProxy::singleton, target, nullptr,
ProxyOptions());
}
JSObject* js::NewDeadProxyObject(JSContext* cx, IsCallableFlag isCallable,
IsConstructorFlag isConstructor) {
int32_t flags = 0;
if (isCallable == IsCallableFlag::True) {
flags |= DeadObjectProxyIsCallable;
}
if (isConstructor == IsConstructorFlag::True) {
flags |= DeadObjectProxyIsConstructor;
}
RootedValue target(cx, Int32Value(flags));
return NewProxyObject(cx, &DeadObjectProxy::singleton, target, nullptr,
ProxyOptions());
}
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