1426 lines
40 KiB
C++
1426 lines
40 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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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 "proxy/ScriptedProxyHandler.h"
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#include "jsapi.h"
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#include "jsobjinlines.h"
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#include "vm/NativeObject-inl.h"
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using namespace js;
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using JS::IsArrayAnswer;
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using mozilla::ArrayLength;
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93
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// 9.1.6.2 IsCompatiblePropertyDescriptor. BUT that method just calls
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// 9.1.6.3 ValidateAndApplyPropertyDescriptor with two additional constant
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// arguments. Therefore step numbering is from the latter method, and
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// resulting dead code has been removed.
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static bool
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IsCompatiblePropertyDescriptor(JSContext* cx, bool extensible, Handle<PropertyDescriptor> desc,
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Handle<PropertyDescriptor> current, bool* bp)
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{
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// Step 2.
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if (!current.object()) {
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// Step 2a-b,e. As |O| is always undefined, steps 2c-d fall away.
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*bp = extensible;
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return true;
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}
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// Step 3.
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if (!desc.hasValue() && !desc.hasWritable() &&
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!desc.hasGetterObject() && !desc.hasSetterObject() &&
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!desc.hasEnumerable() && !desc.hasConfigurable())
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{
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*bp = true;
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return true;
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}
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// Step 4.
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if ((!desc.hasWritable() ||
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(current.hasWritable() && desc.writable() == current.writable())) &&
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(!desc.hasGetterObject() || desc.getter() == current.getter()) &&
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(!desc.hasSetterObject() || desc.setter() == current.setter()) &&
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(!desc.hasEnumerable() || desc.enumerable() == current.enumerable()) &&
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(!desc.hasConfigurable() || desc.configurable() == current.configurable()))
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{
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if (!desc.hasValue()) {
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*bp = true;
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return true;
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}
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bool same = false;
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if (!SameValue(cx, desc.value(), current.value(), &same))
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return false;
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if (same) {
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*bp = true;
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return true;
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}
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}
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// Step 5.
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if (!current.configurable()) {
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// Step 5a.
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if (desc.hasConfigurable() && desc.configurable()) {
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*bp = false;
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return true;
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}
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// Step 5b.
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if (desc.hasEnumerable() && desc.enumerable() != current.enumerable()) {
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*bp = false;
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return true;
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}
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}
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// Step 6.
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if (desc.isGenericDescriptor()) {
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*bp = true;
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return true;
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}
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// Step 7.
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if (current.isDataDescriptor() != desc.isDataDescriptor()) {
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// Steps 7a, 11. As |O| is always undefined, steps 2b-c fall away.
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*bp = current.configurable();
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return true;
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}
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// Step 8.
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if (current.isDataDescriptor()) {
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MOZ_ASSERT(desc.isDataDescriptor()); // by step 7
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if (!current.configurable() && !current.writable()) {
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if (desc.hasWritable() && desc.writable()) {
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*bp = false;
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return true;
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}
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if (desc.hasValue()) {
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bool same;
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if (!SameValue(cx, desc.value(), current.value(), &same))
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return false;
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if (!same) {
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*bp = false;
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return true;
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}
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}
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}
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*bp = true;
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return true;
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}
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// Step 9.
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MOZ_ASSERT(current.isAccessorDescriptor()); // by step 8
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MOZ_ASSERT(desc.isAccessorDescriptor()); // by step 7
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*bp = (current.configurable() ||
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((!desc.hasSetterObject() || desc.setter() == current.setter()) &&
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(!desc.hasGetterObject() || desc.getter() == current.getter())));
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return true;
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}
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// Get the [[ProxyHandler]] of a scripted proxy.
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/* static */ JSObject*
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ScriptedProxyHandler::handlerObject(const JSObject* proxy)
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{
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MOZ_ASSERT(proxy->as<ProxyObject>().handler() == &ScriptedProxyHandler::singleton);
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return proxy->as<ProxyObject>().extra(ScriptedProxyHandler::HANDLER_EXTRA).toObjectOrNull();
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 7.3.9 GetMethod,
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// reimplemented for proxy handler trap-getting to produce better error
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// messages.
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static bool
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GetProxyTrap(JSContext* cx, HandleObject handler, HandlePropertyName name, MutableHandleValue func)
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{
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// Steps 2, 5.
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if (!GetProperty(cx, handler, handler, name, func))
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return false;
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// Step 3.
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if (func.isUndefined())
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return true;
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if (func.isNull()) {
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func.setUndefined();
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return true;
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}
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// Step 4.
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if (!IsCallable(func)) {
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JSAutoByteString bytes(cx, name);
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if (!bytes)
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return false;
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JS_ReportErrorNumberLatin1(cx, GetErrorMessage, nullptr, JSMSG_BAD_TRAP, bytes.ptr());
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return false;
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}
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return true;
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.1 Proxy.[[GetPrototypeOf]].
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bool
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ScriptedProxyHandler::getPrototype(JSContext* cx, HandleObject proxy,
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MutableHandleObject protop) const
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{
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// Steps 1-3.
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RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
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if (!handler) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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// Step 4.
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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MOZ_ASSERT(target);
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// Step 5.
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RootedValue trap(cx);
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if (!GetProxyTrap(cx, handler, cx->names().getPrototypeOf, &trap))
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return false;
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// Step 6.
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if (trap.isUndefined())
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return GetPrototype(cx, target, protop);
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// Step 7.
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RootedValue handlerProto(cx);
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{
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FixedInvokeArgs<1> args(cx);
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args[0].setObject(*target);
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handlerProto.setObject(*handler);
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if (!js::Call(cx, trap, handlerProto, args, &handlerProto))
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return false;
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}
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// Step 8.
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if (!handlerProto.isObjectOrNull()) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
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JSMSG_BAD_GETPROTOTYPEOF_TRAP_RETURN);
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return false;
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}
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// Step 9.
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bool extensibleTarget;
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if (!IsExtensible(cx, target, &extensibleTarget))
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return false;
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// Step 10.
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if (extensibleTarget) {
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protop.set(handlerProto.toObjectOrNull());
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return true;
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}
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// Step 11.
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RootedObject targetProto(cx);
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if (!GetPrototype(cx, target, &targetProto))
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return false;
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// Step 12.
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if (handlerProto.toObjectOrNull() != targetProto) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
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JSMSG_INCONSISTENT_GETPROTOTYPEOF_TRAP);
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return false;
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}
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// Step 13.
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protop.set(handlerProto.toObjectOrNull());
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return true;
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.2 Proxy.[[SetPrototypeOf]].
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bool
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ScriptedProxyHandler::setPrototype(JSContext* cx, HandleObject proxy, HandleObject proto,
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ObjectOpResult& result) const
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{
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// Steps 1-4.
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RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
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if (!handler) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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// Step 5.
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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MOZ_ASSERT(target);
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// Step 6.
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RootedValue trap(cx);
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if (!GetProxyTrap(cx, handler, cx->names().setPrototypeOf, &trap))
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return false;
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// Step 7.
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if (trap.isUndefined())
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return SetPrototype(cx, target, proto, result);
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// Step 8.
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bool booleanTrapResult;
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{
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FixedInvokeArgs<2> args(cx);
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args[0].setObject(*target);
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args[1].setObjectOrNull(proto);
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RootedValue hval(cx, ObjectValue(*handler));
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if (!js::Call(cx, trap, hval, args, &hval))
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return false;
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booleanTrapResult = ToBoolean(hval);
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}
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// Step 9.
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if (!booleanTrapResult)
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return result.fail(JSMSG_PROXY_SETPROTOTYPEOF_RETURNED_FALSE);
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// Step 10.
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bool extensibleTarget;
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if (!IsExtensible(cx, target, &extensibleTarget))
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return false;
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// Step 11.
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if (extensibleTarget)
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return result.succeed();
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// Step 12.
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RootedObject targetProto(cx);
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if (!GetPrototype(cx, target, &targetProto))
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return false;
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// Step 13.
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if (proto != targetProto) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
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JSMSG_INCONSISTENT_SETPROTOTYPEOF_TRAP);
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return false;
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}
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// Step 14.
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return result.succeed();
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}
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bool
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ScriptedProxyHandler::getPrototypeIfOrdinary(JSContext* cx, HandleObject proxy, bool* isOrdinary,
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MutableHandleObject protop) const
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{
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*isOrdinary = false;
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return true;
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}
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// Not yet part of ES6, but hopefully to be standards-tracked -- and needed to
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// handle revoked proxies in any event.
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bool
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ScriptedProxyHandler::setImmutablePrototype(JSContext* cx, HandleObject proxy,
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bool* succeeded) const
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{
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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if (!target) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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return SetImmutablePrototype(cx, target, succeeded);
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.4 Proxy.[[PreventExtensions]]()
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bool
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ScriptedProxyHandler::preventExtensions(JSContext* cx, HandleObject proxy,
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ObjectOpResult& result) const
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{
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// Steps 1-3.
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RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
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if (!handler) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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// Step 4.
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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MOZ_ASSERT(target);
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// Step 5.
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RootedValue trap(cx);
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if (!GetProxyTrap(cx, handler, cx->names().preventExtensions, &trap))
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return false;
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// Step 6.
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if (trap.isUndefined())
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return PreventExtensions(cx, target, result);
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// Step 7.
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bool booleanTrapResult;
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{
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RootedValue arg(cx, ObjectValue(*target));
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RootedValue trapResult(cx);
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if (!Call(cx, trap, handler, arg, &trapResult))
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return false;
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booleanTrapResult = ToBoolean(trapResult);
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}
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// Step 8.
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if (booleanTrapResult) {
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// Step 8a.
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bool targetIsExtensible;
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if (!IsExtensible(cx, target, &targetIsExtensible))
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return false;
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if (targetIsExtensible) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr,
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JSMSG_CANT_REPORT_AS_NON_EXTENSIBLE);
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return false;
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}
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// Step 9.
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return result.succeed();
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}
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// Also step 9.
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return result.fail(JSMSG_PROXY_PREVENTEXTENSIONS_RETURNED_FALSE);
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.3 Proxy.[[IsExtensible]]()
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bool
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ScriptedProxyHandler::isExtensible(JSContext* cx, HandleObject proxy, bool* extensible) const
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{
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// Steps 1-3.
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RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
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if (!handler) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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// Step 4.
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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MOZ_ASSERT(target);
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// Step 5.
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RootedValue trap(cx);
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if (!GetProxyTrap(cx, handler, cx->names().isExtensible, &trap))
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return false;
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// Step 6.
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if (trap.isUndefined())
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return IsExtensible(cx, target, extensible);
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// Step 7.
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bool booleanTrapResult;
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{
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RootedValue arg(cx, ObjectValue(*target));
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RootedValue trapResult(cx);
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if (!Call(cx, trap, handler, arg, &trapResult))
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return false;
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booleanTrapResult = ToBoolean(trapResult);
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}
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// Steps 8.
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bool targetResult;
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if (!IsExtensible(cx, target, &targetResult))
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return false;
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// Step 9.
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if (targetResult != booleanTrapResult) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_EXTENSIBILITY);
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return false;
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}
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// Step 10.
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*extensible = booleanTrapResult;
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return true;
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}
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// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.5 Proxy.[[GetOwnProperty]](P)
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bool
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ScriptedProxyHandler::getOwnPropertyDescriptor(JSContext* cx, HandleObject proxy, HandleId id,
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MutableHandle<PropertyDescriptor> desc) const
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{
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// Steps 2-4.
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RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
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if (!handler) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
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return false;
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}
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// Step 5.
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RootedObject target(cx, proxy->as<ProxyObject>().target());
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MOZ_ASSERT(target);
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// Step 6.
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RootedValue trap(cx);
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if (!GetProxyTrap(cx, handler, cx->names().getOwnPropertyDescriptor, &trap))
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return false;
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// Step 7.
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if (trap.isUndefined())
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return GetOwnPropertyDescriptor(cx, target, id, desc);
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// Step 8.
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RootedValue propKey(cx);
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if (!IdToStringOrSymbol(cx, id, &propKey))
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return false;
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RootedValue trapResult(cx);
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RootedValue targetVal(cx, ObjectValue(*target));
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if (!Call(cx, trap, handler, targetVal, propKey, &trapResult))
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return false;
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// Step 9.
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if (!trapResult.isUndefined() && !trapResult.isObject()) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_GETOWN_OBJORUNDEF);
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return false;
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}
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// Step 10.
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Rooted<PropertyDescriptor> targetDesc(cx);
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if (!GetOwnPropertyDescriptor(cx, target, id, &targetDesc))
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return false;
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// Step 11.
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if (trapResult.isUndefined()) {
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// Step 11a.
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if (!targetDesc.object()) {
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desc.object().set(nullptr);
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return true;
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}
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// Step 11b.
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if (!targetDesc.configurable()) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_NC_AS_NE);
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return false;
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}
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// Steps 11c-d.
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bool extensibleTarget;
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if (!IsExtensible(cx, target, &extensibleTarget))
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return false;
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// Step 11e.
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if (!extensibleTarget) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_E_AS_NE);
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return false;
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}
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// Step 11f.
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desc.object().set(nullptr);
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return true;
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}
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// Step 12.
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bool extensibleTarget;
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if (!IsExtensible(cx, target, &extensibleTarget))
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return false;
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// Step 13.
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Rooted<PropertyDescriptor> resultDesc(cx);
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if (!ToPropertyDescriptor(cx, trapResult, true, &resultDesc))
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return false;
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// Step 14.
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CompletePropertyDescriptor(&resultDesc);
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// Step 15.
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bool valid;
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if (!IsCompatiblePropertyDescriptor(cx, extensibleTarget, resultDesc, targetDesc, &valid))
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return false;
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// Step 16.
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if (!valid) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_INVALID);
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return false;
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}
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// Step 17.
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if (!resultDesc.configurable()) {
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if (!targetDesc.object()) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_NE_AS_NC);
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return false;
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}
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if (targetDesc.configurable()) {
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_C_AS_NC);
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return false;
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}
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|
}
|
|
|
|
// Step 18.
|
|
desc.set(resultDesc);
|
|
desc.object().set(proxy);
|
|
return true;
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.6 Proxy.[[DefineOwnProperty]](P, Desc)
|
|
bool
|
|
ScriptedProxyHandler::defineProperty(JSContext* cx, HandleObject proxy, HandleId id,
|
|
Handle<PropertyDescriptor> desc, ObjectOpResult& result) const
|
|
{
|
|
// Steps 2-4.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 5.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Step 6.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().defineProperty, &trap))
|
|
return false;
|
|
|
|
// Step 7.
|
|
if (trap.isUndefined())
|
|
return DefineProperty(cx, target, id, desc, result);
|
|
|
|
// Step 8.
|
|
RootedValue descObj(cx);
|
|
if (!FromPropertyDescriptorToObject(cx, desc, &descObj))
|
|
return false;
|
|
|
|
// Step 9.
|
|
RootedValue propKey(cx);
|
|
if (!IdToStringOrSymbol(cx, id, &propKey))
|
|
return false;
|
|
|
|
RootedValue trapResult(cx);
|
|
{
|
|
FixedInvokeArgs<3> args(cx);
|
|
|
|
args[0].setObject(*target);
|
|
args[1].set(propKey);
|
|
args[2].set(descObj);
|
|
|
|
RootedValue thisv(cx, ObjectValue(*handler));
|
|
if (!Call(cx, trap, thisv, args, &trapResult))
|
|
return false;
|
|
}
|
|
|
|
// Step 10.
|
|
if (!ToBoolean(trapResult))
|
|
return result.fail(JSMSG_PROXY_DEFINE_RETURNED_FALSE);
|
|
|
|
// Step 11.
|
|
Rooted<PropertyDescriptor> targetDesc(cx);
|
|
if (!GetOwnPropertyDescriptor(cx, target, id, &targetDesc))
|
|
return false;
|
|
|
|
// Step 12.
|
|
bool extensibleTarget;
|
|
if (!IsExtensible(cx, target, &extensibleTarget))
|
|
return false;
|
|
|
|
// Steps 13-14.
|
|
bool settingConfigFalse = desc.hasConfigurable() && !desc.configurable();
|
|
|
|
// Steps 15-16.
|
|
if (!targetDesc.object()) {
|
|
// Step 15a.
|
|
if (!extensibleTarget) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_DEFINE_NEW);
|
|
return false;
|
|
}
|
|
|
|
// Step 15b.
|
|
if (settingConfigFalse) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_DEFINE_NE_AS_NC);
|
|
return false;
|
|
}
|
|
} else {
|
|
// Steps 16a-b.
|
|
bool valid;
|
|
if (!IsCompatiblePropertyDescriptor(cx, extensibleTarget, desc, targetDesc, &valid))
|
|
return false;
|
|
|
|
if (!valid || (settingConfigFalse && targetDesc.configurable())) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_DEFINE_INVALID);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Step 17.
|
|
return result.succeed();
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93
|
|
// 7.3.17 CreateListFromArrayLike with elementTypes fixed to symbol/string.
|
|
static bool
|
|
CreateFilteredListFromArrayLike(JSContext* cx, HandleValue v, AutoIdVector& props)
|
|
{
|
|
// Step 2.
|
|
RootedObject obj(cx, NonNullObject(cx, v));
|
|
if (!obj)
|
|
return false;
|
|
|
|
// Step 3.
|
|
uint32_t len;
|
|
if (!GetLengthProperty(cx, obj, &len))
|
|
return false;
|
|
|
|
// Steps 4-6.
|
|
RootedValue next(cx);
|
|
RootedId id(cx);
|
|
uint32_t index = 0;
|
|
while (index < len) {
|
|
// Steps 6a-b.
|
|
if (!GetElement(cx, obj, obj, index, &next))
|
|
return false;
|
|
|
|
// Step 6c.
|
|
if (!next.isString() && !next.isSymbol()) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_ONWKEYS_STR_SYM);
|
|
return false;
|
|
}
|
|
|
|
if (!ValueToId<CanGC>(cx, next, &id))
|
|
return false;
|
|
|
|
// Step 6d.
|
|
if (!props.append(id))
|
|
return false;
|
|
|
|
// Step 6e.
|
|
index++;
|
|
}
|
|
|
|
// Step 7.
|
|
return true;
|
|
}
|
|
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.11 Proxy.[[OwnPropertyKeys]]()
|
|
bool
|
|
ScriptedProxyHandler::ownPropertyKeys(JSContext* cx, HandleObject proxy, AutoIdVector& props) const
|
|
{
|
|
// Steps 1-3.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 4.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Step 5.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().ownKeys, &trap))
|
|
return false;
|
|
|
|
// Step 6.
|
|
if (trap.isUndefined())
|
|
return GetPropertyKeys(cx, target, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, &props);
|
|
|
|
// Step 7.
|
|
RootedValue trapResultArray(cx);
|
|
RootedValue targetVal(cx, ObjectValue(*target));
|
|
if (!Call(cx, trap, handler, targetVal, &trapResultArray))
|
|
return false;
|
|
|
|
// Step 8.
|
|
AutoIdVector trapResult(cx);
|
|
if (!CreateFilteredListFromArrayLike(cx, trapResultArray, trapResult))
|
|
return false;
|
|
|
|
// Step 9.
|
|
bool extensibleTarget;
|
|
if (!IsExtensible(cx, target, &extensibleTarget))
|
|
return false;
|
|
|
|
// Steps 10-11.
|
|
AutoIdVector targetKeys(cx);
|
|
if (!GetPropertyKeys(cx, target, JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, &targetKeys))
|
|
return false;
|
|
|
|
// Steps 12-13.
|
|
AutoIdVector targetConfigurableKeys(cx);
|
|
AutoIdVector targetNonconfigurableKeys(cx);
|
|
|
|
// Step 14.
|
|
Rooted<PropertyDescriptor> desc(cx);
|
|
for (size_t i = 0; i < targetKeys.length(); ++i) {
|
|
// Step 14a.
|
|
if (!GetOwnPropertyDescriptor(cx, target, targetKeys[i], &desc))
|
|
return false;
|
|
|
|
// Steps 14b-c.
|
|
if (desc.object() && !desc.configurable()) {
|
|
if (!targetNonconfigurableKeys.append(targetKeys[i]))
|
|
return false;
|
|
} else {
|
|
if (!targetConfigurableKeys.append(targetKeys[i]))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Step 15.
|
|
if (extensibleTarget && targetNonconfigurableKeys.empty())
|
|
return props.appendAll(trapResult);
|
|
|
|
// Step 16.
|
|
// The algorithm below always removes all occurences of the same key
|
|
// at once, so we can use a set here.
|
|
Rooted<GCHashSet<jsid>> uncheckedResultKeys(cx, GCHashSet<jsid>(cx));
|
|
if (!uncheckedResultKeys.init(trapResult.length()))
|
|
return false;
|
|
|
|
for (size_t i = 0, len = trapResult.length(); i < len; i++) {
|
|
MOZ_ASSERT(!JSID_IS_VOID(trapResult[i]));
|
|
|
|
if (!uncheckedResultKeys.put(trapResult[i]))
|
|
return false;
|
|
}
|
|
|
|
// Step 17.
|
|
for (size_t i = 0; i < targetNonconfigurableKeys.length(); ++i) {
|
|
MOZ_ASSERT(!JSID_IS_VOID(targetNonconfigurableKeys[i]));
|
|
|
|
auto ptr = uncheckedResultKeys.lookup(targetNonconfigurableKeys[i]);
|
|
|
|
// Step 17a.
|
|
if (!ptr) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_SKIP_NC);
|
|
return false;
|
|
}
|
|
|
|
// Step 17b.
|
|
uncheckedResultKeys.remove(ptr);
|
|
}
|
|
|
|
// Step 18.
|
|
if (extensibleTarget)
|
|
return props.appendAll(trapResult);
|
|
|
|
// Step 19.
|
|
for (size_t i = 0; i < targetConfigurableKeys.length(); ++i) {
|
|
MOZ_ASSERT(!JSID_IS_VOID(targetConfigurableKeys[i]));
|
|
|
|
auto ptr = uncheckedResultKeys.lookup(targetConfigurableKeys[i]);
|
|
|
|
// Step 19a.
|
|
if (!ptr) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_E_AS_NE);
|
|
return false;
|
|
}
|
|
|
|
// Step 19b.
|
|
uncheckedResultKeys.remove(ptr);
|
|
}
|
|
|
|
// Step 20.
|
|
if (!uncheckedResultKeys.empty()) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_NEW);
|
|
return false;
|
|
}
|
|
|
|
// Step 21.
|
|
return props.appendAll(trapResult);
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.10 Proxy.[[Delete]](P)
|
|
bool
|
|
ScriptedProxyHandler::delete_(JSContext* cx, HandleObject proxy, HandleId id,
|
|
ObjectOpResult& result) const
|
|
{
|
|
// Steps 2-4.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 5.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Step 6.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().deleteProperty, &trap))
|
|
return false;
|
|
|
|
// Step 7.
|
|
if (trap.isUndefined())
|
|
return DeleteProperty(cx, target, id, result);
|
|
|
|
// Step 8.
|
|
bool booleanTrapResult;
|
|
{
|
|
RootedValue value(cx);
|
|
if (!IdToStringOrSymbol(cx, id, &value))
|
|
return false;
|
|
|
|
RootedValue targetVal(cx, ObjectValue(*target));
|
|
RootedValue trapResult(cx);
|
|
if (!Call(cx, trap, handler, targetVal, value, &trapResult))
|
|
return false;
|
|
|
|
booleanTrapResult = ToBoolean(trapResult);
|
|
}
|
|
|
|
// Step 9.
|
|
if (!booleanTrapResult)
|
|
return result.fail(JSMSG_PROXY_DELETE_RETURNED_FALSE);
|
|
|
|
// Step 10.
|
|
Rooted<PropertyDescriptor> desc(cx);
|
|
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
|
|
return false;
|
|
|
|
// Step 12.
|
|
if (desc.object() && !desc.configurable()) {
|
|
RootedValue v(cx, IdToValue(id));
|
|
ReportValueError(cx, JSMSG_CANT_DELETE, JSDVG_IGNORE_STACK, v, nullptr);
|
|
return false;
|
|
}
|
|
|
|
// Steps 11,13.
|
|
return result.succeed();
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.7 Proxy.[[HasProperty]](P)
|
|
bool
|
|
ScriptedProxyHandler::has(JSContext* cx, HandleObject proxy, HandleId id, bool* bp) const
|
|
{
|
|
// Steps 2-4.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 5.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Step 6.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().has, &trap))
|
|
return false;
|
|
|
|
// Step 7.
|
|
if (trap.isUndefined())
|
|
return HasProperty(cx, target, id, bp);
|
|
|
|
// Step 8.
|
|
RootedValue value(cx);
|
|
if (!IdToStringOrSymbol(cx, id, &value))
|
|
return false;
|
|
|
|
RootedValue trapResult(cx);
|
|
RootedValue targetVal(cx, ObjectValue(*target));
|
|
if (!Call(cx, trap, handler, targetVal, value, &trapResult))
|
|
return false;
|
|
|
|
bool booleanTrapResult = ToBoolean(trapResult);
|
|
|
|
// Step 9.
|
|
if (!booleanTrapResult) {
|
|
// Step 9a.
|
|
Rooted<PropertyDescriptor> desc(cx);
|
|
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
|
|
return false;
|
|
|
|
// Step 9b.
|
|
if (desc.object()) {
|
|
// Step 9b(i).
|
|
if (!desc.configurable()) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_NC_AS_NE);
|
|
return false;
|
|
}
|
|
|
|
// Step 9b(ii).
|
|
bool extensible;
|
|
if (!IsExtensible(cx, target, &extensible))
|
|
return false;
|
|
|
|
// Step 9b(iii).
|
|
if (!extensible) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_REPORT_E_AS_NE);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Step 10.
|
|
*bp = booleanTrapResult;
|
|
return true;
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.8 Proxy.[[GetP]](P, Receiver)
|
|
bool
|
|
ScriptedProxyHandler::get(JSContext* cx, HandleObject proxy, HandleValue receiver, HandleId id,
|
|
MutableHandleValue vp) const
|
|
{
|
|
// Steps 2-4.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 5.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Steps 6.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().get, &trap))
|
|
return false;
|
|
|
|
// Step 7.
|
|
if (trap.isUndefined())
|
|
return GetProperty(cx, target, receiver, id, vp);
|
|
|
|
// Step 8.
|
|
RootedValue value(cx);
|
|
if (!IdToStringOrSymbol(cx, id, &value))
|
|
return false;
|
|
|
|
RootedValue trapResult(cx);
|
|
{
|
|
FixedInvokeArgs<3> args(cx);
|
|
|
|
args[0].setObject(*target);
|
|
args[1].set(value);
|
|
args[2].set(receiver);
|
|
|
|
RootedValue thisv(cx, ObjectValue(*handler));
|
|
if (!Call(cx, trap, thisv, args, &trapResult))
|
|
return false;
|
|
}
|
|
|
|
// Step 9.
|
|
Rooted<PropertyDescriptor> desc(cx);
|
|
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
|
|
return false;
|
|
|
|
// Step 10.
|
|
if (desc.object()) {
|
|
// Step 10a.
|
|
if (desc.isDataDescriptor() && !desc.configurable() && !desc.writable()) {
|
|
bool same;
|
|
if (!SameValue(cx, trapResult, desc.value(), &same))
|
|
return false;
|
|
if (!same) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_MUST_REPORT_SAME_VALUE);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Step 10b.
|
|
if (desc.isAccessorDescriptor() && !desc.configurable() && desc.getterObject() == nullptr) {
|
|
if (!trapResult.isUndefined()) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_MUST_REPORT_UNDEFINED);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Step 11.
|
|
vp.set(trapResult);
|
|
return true;
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.9 Proxy.[[Set]](P, V, Receiver)
|
|
bool
|
|
ScriptedProxyHandler::set(JSContext* cx, HandleObject proxy, HandleId id, HandleValue v,
|
|
HandleValue receiver, ObjectOpResult& result) const
|
|
{
|
|
// Steps 2-4.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 5.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
|
|
// Step 6.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().set, &trap))
|
|
return false;
|
|
|
|
// Step 7.
|
|
if (trap.isUndefined())
|
|
return SetProperty(cx, target, id, v, receiver, result);
|
|
|
|
// Step 8.
|
|
RootedValue value(cx);
|
|
if (!IdToStringOrSymbol(cx, id, &value))
|
|
return false;
|
|
|
|
RootedValue trapResult(cx);
|
|
{
|
|
FixedInvokeArgs<4> args(cx);
|
|
|
|
args[0].setObject(*target);
|
|
args[1].set(value);
|
|
args[2].set(v);
|
|
args[3].set(receiver);
|
|
|
|
RootedValue thisv(cx, ObjectValue(*handler));
|
|
if (!Call(cx, trap, thisv, args, &trapResult))
|
|
return false;
|
|
}
|
|
|
|
// Step 9.
|
|
if (!ToBoolean(trapResult))
|
|
return result.fail(JSMSG_PROXY_SET_RETURNED_FALSE);
|
|
|
|
// Step 10.
|
|
Rooted<PropertyDescriptor> desc(cx);
|
|
if (!GetOwnPropertyDescriptor(cx, target, id, &desc))
|
|
return false;
|
|
|
|
// Step 11.
|
|
if (desc.object()) {
|
|
// Step 11a.
|
|
if (desc.isDataDescriptor() && !desc.configurable() && !desc.writable()) {
|
|
bool same;
|
|
if (!SameValue(cx, v, desc.value(), &same))
|
|
return false;
|
|
if (!same) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_SET_NW_NC);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Step 11b.
|
|
if (desc.isAccessorDescriptor() && !desc.configurable() && desc.setterObject() == nullptr) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_CANT_SET_WO_SETTER);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Step 12.
|
|
return result.succeed();
|
|
}
|
|
|
|
// ES7 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.13 Proxy.[[Call]]
|
|
bool
|
|
ScriptedProxyHandler::call(JSContext* cx, HandleObject proxy, const CallArgs& args) const
|
|
{
|
|
// Steps 1-3.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 4.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
MOZ_ASSERT(target->isCallable());
|
|
|
|
// Step 5.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().apply, &trap))
|
|
return false;
|
|
|
|
// Step 6.
|
|
if (trap.isUndefined()) {
|
|
InvokeArgs iargs(cx);
|
|
if (!FillArgumentsFromArraylike(cx, iargs, args))
|
|
return false;
|
|
|
|
RootedValue fval(cx, ObjectValue(*target));
|
|
return js::Call(cx, fval, args.thisv(), iargs, args.rval());
|
|
}
|
|
|
|
// Step 7.
|
|
RootedObject argArray(cx, NewDenseCopiedArray(cx, args.length(), args.array()));
|
|
if (!argArray)
|
|
return false;
|
|
|
|
// Step 8.
|
|
FixedInvokeArgs<3> iargs(cx);
|
|
|
|
iargs[0].setObject(*target);
|
|
iargs[1].set(args.thisv());
|
|
iargs[2].setObject(*argArray);
|
|
|
|
RootedValue thisv(cx, ObjectValue(*handler));
|
|
return js::Call(cx, trap, thisv, iargs, args.rval());
|
|
}
|
|
|
|
// ES7 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.14 Proxy.[[Construct]]
|
|
bool
|
|
ScriptedProxyHandler::construct(JSContext* cx, HandleObject proxy, const CallArgs& args) const
|
|
{
|
|
// Steps 1-3.
|
|
RootedObject handler(cx, ScriptedProxyHandler::handlerObject(proxy));
|
|
if (!handler) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_REVOKED);
|
|
return false;
|
|
}
|
|
|
|
// Step 4.
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
MOZ_ASSERT(target);
|
|
MOZ_ASSERT(target->isConstructor());
|
|
|
|
// Step 5.
|
|
RootedValue trap(cx);
|
|
if (!GetProxyTrap(cx, handler, cx->names().construct, &trap))
|
|
return false;
|
|
|
|
// Step 6.
|
|
if (trap.isUndefined()) {
|
|
ConstructArgs cargs(cx);
|
|
if (!FillArgumentsFromArraylike(cx, cargs, args))
|
|
return false;
|
|
|
|
RootedValue targetv(cx, ObjectValue(*target));
|
|
RootedObject obj(cx);
|
|
if (!Construct(cx, targetv, cargs, args.newTarget(), &obj))
|
|
return false;
|
|
|
|
args.rval().setObject(*obj);
|
|
return true;
|
|
}
|
|
|
|
// Step 7.
|
|
RootedObject argArray(cx, NewDenseCopiedArray(cx, args.length(), args.array()));
|
|
if (!argArray)
|
|
return false;
|
|
|
|
// Steps 8, 10.
|
|
{
|
|
FixedInvokeArgs<3> iargs(cx);
|
|
|
|
iargs[0].setObject(*target);
|
|
iargs[1].setObject(*argArray);
|
|
iargs[2].set(args.newTarget());
|
|
|
|
RootedValue thisv(cx, ObjectValue(*handler));
|
|
if (!Call(cx, trap, thisv, iargs, args.rval()))
|
|
return false;
|
|
}
|
|
|
|
// Step 9.
|
|
if (!args.rval().isObject()) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_CONSTRUCT_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::nativeCall(JSContext* cx, IsAcceptableThis test, NativeImpl impl,
|
|
const CallArgs& args) const
|
|
{
|
|
ReportIncompatible(cx, args);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::hasInstance(JSContext* cx, HandleObject proxy, MutableHandleValue v,
|
|
bool* bp) const
|
|
{
|
|
return InstanceofOperator(cx, proxy, v, bp);
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::getBuiltinClass(JSContext* cx, HandleObject proxy,
|
|
ESClass* cls) const
|
|
{
|
|
*cls = ESClass::Other;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::isArray(JSContext* cx, HandleObject proxy, IsArrayAnswer* answer) const
|
|
{
|
|
RootedObject target(cx, proxy->as<ProxyObject>().target());
|
|
if (target)
|
|
return JS::IsArray(cx, target, answer);
|
|
|
|
*answer = IsArrayAnswer::RevokedProxy;
|
|
return true;
|
|
}
|
|
|
|
const char*
|
|
ScriptedProxyHandler::className(JSContext* cx, HandleObject proxy) const
|
|
{
|
|
// Right now the caller is not prepared to handle failures.
|
|
return BaseProxyHandler::className(cx, proxy);
|
|
}
|
|
|
|
JSString*
|
|
ScriptedProxyHandler::fun_toString(JSContext* cx, HandleObject proxy, unsigned indent) const
|
|
{
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_INCOMPATIBLE_PROTO,
|
|
js_Function_str, js_toString_str, "object");
|
|
return nullptr;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::regexp_toShared(JSContext* cx, HandleObject proxy, RegExpGuard* g) const
|
|
{
|
|
MOZ_CRASH("Should not end up in ScriptedProxyHandler::regexp_toShared");
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::boxedValue_unbox(JSContext* cx, HandleObject proxy,
|
|
MutableHandleValue vp) const
|
|
{
|
|
MOZ_CRASH("Should not end up in ScriptedProxyHandler::boxedValue_unbox");
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::isCallable(JSObject* obj) const
|
|
{
|
|
MOZ_ASSERT(obj->as<ProxyObject>().handler() == &ScriptedProxyHandler::singleton);
|
|
uint32_t callConstruct = obj->as<ProxyObject>().extra(IS_CALLCONSTRUCT_EXTRA).toPrivateUint32();
|
|
return !!(callConstruct & IS_CALLABLE);
|
|
}
|
|
|
|
bool
|
|
ScriptedProxyHandler::isConstructor(JSObject* obj) const
|
|
{
|
|
MOZ_ASSERT(obj->as<ProxyObject>().handler() == &ScriptedProxyHandler::singleton);
|
|
uint32_t callConstruct = obj->as<ProxyObject>().extra(IS_CALLCONSTRUCT_EXTRA).toPrivateUint32();
|
|
return !!(callConstruct & IS_CONSTRUCTOR);
|
|
}
|
|
|
|
const char ScriptedProxyHandler::family = 0;
|
|
const ScriptedProxyHandler ScriptedProxyHandler::singleton;
|
|
|
|
bool
|
|
IsRevokedScriptedProxy(JSObject* obj)
|
|
{
|
|
obj = CheckedUnwrap(obj);
|
|
return obj && IsScriptedProxy(obj) && !obj->as<ProxyObject>().target();
|
|
}
|
|
|
|
// ES8 rev 0c1bd3004329336774cbc90de727cd0cf5f11e93 9.5.14 ProxyCreate.
|
|
static bool
|
|
ProxyCreate(JSContext* cx, CallArgs& args, const char* callerName)
|
|
{
|
|
if (args.length() < 2) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_MORE_ARGS_NEEDED,
|
|
callerName, "1", "s");
|
|
return false;
|
|
}
|
|
|
|
// Step 1.
|
|
RootedObject target(cx, NonNullObject(cx, args[0]));
|
|
if (!target)
|
|
return false;
|
|
|
|
// Step 2.
|
|
if (IsRevokedScriptedProxy(target)) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_ARG_REVOKED, "1");
|
|
return false;
|
|
}
|
|
|
|
// Step 3.
|
|
RootedObject handler(cx, NonNullObject(cx, args[1]));
|
|
if (!handler)
|
|
return false;
|
|
|
|
// Step 4.
|
|
if (IsRevokedScriptedProxy(handler)) {
|
|
JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_PROXY_ARG_REVOKED, "2");
|
|
return false;
|
|
}
|
|
|
|
// Steps 5-6, 8.
|
|
RootedValue priv(cx, ObjectValue(*target));
|
|
JSObject* proxy_ =
|
|
NewProxyObject(cx, &ScriptedProxyHandler::singleton, priv, TaggedProto::LazyProto);
|
|
if (!proxy_)
|
|
return false;
|
|
|
|
// Step 9 (reordered).
|
|
Rooted<ProxyObject*> proxy(cx, &proxy_->as<ProxyObject>());
|
|
proxy->setExtra(ScriptedProxyHandler::HANDLER_EXTRA, ObjectValue(*handler));
|
|
|
|
// Step 7.
|
|
uint32_t callable = target->isCallable() ? ScriptedProxyHandler::IS_CALLABLE : 0;
|
|
uint32_t constructor = target->isConstructor() ? ScriptedProxyHandler::IS_CONSTRUCTOR : 0;
|
|
proxy->setExtra(ScriptedProxyHandler::IS_CALLCONSTRUCT_EXTRA,
|
|
PrivateUint32Value(callable | constructor));
|
|
|
|
// Step 10.
|
|
args.rval().setObject(*proxy);
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
js::proxy(JSContext* cx, unsigned argc, Value* vp)
|
|
{
|
|
CallArgs args = CallArgsFromVp(argc, vp);
|
|
|
|
if (!ThrowIfNotConstructing(cx, args, "Proxy"))
|
|
return false;
|
|
|
|
return ProxyCreate(cx, args, "Proxy");
|
|
}
|
|
|
|
static bool
|
|
RevokeProxy(JSContext* cx, unsigned argc, Value* vp)
|
|
{
|
|
CallArgs args = CallArgsFromVp(argc, vp);
|
|
|
|
RootedFunction func(cx, &args.callee().as<JSFunction>());
|
|
RootedObject p(cx, func->getExtendedSlot(ScriptedProxyHandler::REVOKE_SLOT).toObjectOrNull());
|
|
|
|
if (p) {
|
|
func->setExtendedSlot(ScriptedProxyHandler::REVOKE_SLOT, NullValue());
|
|
|
|
MOZ_ASSERT(p->is<ProxyObject>());
|
|
|
|
p->as<ProxyObject>().setSameCompartmentPrivate(NullValue());
|
|
p->as<ProxyObject>().setExtra(ScriptedProxyHandler::HANDLER_EXTRA, NullValue());
|
|
}
|
|
|
|
args.rval().setUndefined();
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
js::proxy_revocable(JSContext* cx, unsigned argc, Value* vp)
|
|
{
|
|
CallArgs args = CallArgsFromVp(argc, vp);
|
|
|
|
if (!ProxyCreate(cx, args, "Proxy.revocable"))
|
|
return false;
|
|
|
|
RootedValue proxyVal(cx, args.rval());
|
|
MOZ_ASSERT(proxyVal.toObject().is<ProxyObject>());
|
|
|
|
RootedObject revoker(cx, NewFunctionByIdWithReserved(cx, RevokeProxy, 0, 0,
|
|
AtomToId(cx->names().revoke)));
|
|
if (!revoker)
|
|
return false;
|
|
|
|
revoker->as<JSFunction>().initExtendedSlot(ScriptedProxyHandler::REVOKE_SLOT, proxyVal);
|
|
|
|
RootedPlainObject result(cx, NewBuiltinClassInstance<PlainObject>(cx));
|
|
if (!result)
|
|
return false;
|
|
|
|
RootedValue revokeVal(cx, ObjectValue(*revoker));
|
|
if (!DefineProperty(cx, result, cx->names().proxy, proxyVal) ||
|
|
!DefineProperty(cx, result, cx->names().revoke, revokeVal))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
args.rval().setObject(*result);
|
|
return true;
|
|
}
|