mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
1216 lines
36 KiB
C++
1216 lines
36 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=4 sw=4 et tw=99:
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*
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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 "jsapi.h"
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#include "jscntxt.h"
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#include "jscompartment.h"
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#include "jsexn.h"
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#include "jsgc.h"
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#include "jsiter.h"
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#include "jsnum.h"
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#include "jswrapper.h"
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#ifdef JS_METHODJIT
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# include "assembler/jit/ExecutableAllocator.h"
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#endif
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#include "gc/Marking.h"
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#include "methodjit/PolyIC.h"
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#include "methodjit/MonoIC.h"
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#include "jsobjinlines.h"
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#include "vm/RegExpObject-inl.h"
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using namespace js;
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using namespace js::gc;
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namespace js {
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int sWrapperFamily;
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}
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void *
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DirectWrapper::getWrapperFamily()
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{
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return &sWrapperFamily;
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}
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JSObject *
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Wrapper::New(JSContext *cx, JSObject *obj, JSObject *proto, JSObject *parent,
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Wrapper *handler)
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{
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JS_ASSERT(parent);
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#if JS_HAS_XML_SUPPORT
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if (obj->isXML()) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL,
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JSMSG_CANT_WRAP_XML_OBJECT);
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return NULL;
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}
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#endif
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return NewProxyObject(cx, handler->toBaseProxyHandler(), ObjectValue(*obj),
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proto, parent, obj->isCallable() ? obj : NULL, NULL);
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}
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Wrapper *
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Wrapper::wrapperHandler(const JSObject *wrapper)
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{
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JS_ASSERT(wrapper->isWrapper());
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return GetProxyHandler(wrapper)->toWrapper();
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}
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JSObject *
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Wrapper::wrappedObject(const JSObject *wrapper)
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{
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JS_ASSERT(wrapper->isWrapper());
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return GetProxyTargetObject(wrapper);
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}
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Wrapper::Wrapper(unsigned flags) : mFlags(flags)
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{
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}
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bool
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Wrapper::enter(JSContext *cx, JSObject *wrapper, jsid id, Action act, bool *bp)
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{
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*bp = true;
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return true;
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}
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JS_FRIEND_API(JSObject *)
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js::UnwrapObject(JSObject *wrapped, bool stopAtOuter, unsigned *flagsp)
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{
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unsigned flags = 0;
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while (wrapped->isWrapper() &&
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!JS_UNLIKELY(stopAtOuter && wrapped->getClass()->ext.innerObject)) {
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flags |= Wrapper::wrapperHandler(wrapped)->flags();
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wrapped = GetProxyPrivate(wrapped).toObjectOrNull();
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}
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if (flagsp)
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*flagsp = flags;
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return wrapped;
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}
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JS_FRIEND_API(JSObject *)
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js::UnwrapObjectChecked(JSContext *cx, JSObject *obj)
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{
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while (obj->isWrapper() &&
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!JS_UNLIKELY(!!obj->getClass()->ext.innerObject)) {
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JSObject *wrapper = obj;
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Wrapper *handler = Wrapper::wrapperHandler(obj);
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bool rvOnFailure;
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if (!handler->enter(cx, wrapper, JSID_VOID,
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Wrapper::PUNCTURE, &rvOnFailure))
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return rvOnFailure ? obj : NULL;
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obj = Wrapper::wrappedObject(obj);
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JS_ASSERT(obj);
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}
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return obj;
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}
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bool
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js::IsCrossCompartmentWrapper(const JSObject *wrapper)
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{
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return wrapper->isWrapper() &&
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!!(Wrapper::wrapperHandler(wrapper)->flags() & Wrapper::CROSS_COMPARTMENT);
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}
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IndirectWrapper::IndirectWrapper(unsigned flags) : Wrapper(flags),
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IndirectProxyHandler(&sWrapperFamily)
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{
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}
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#define CHECKED(op, act) \
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JS_BEGIN_MACRO \
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bool status; \
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if (!enter(cx, wrapper, id, act, &status)) \
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return status; \
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return (op); \
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JS_END_MACRO
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#define SET(action) CHECKED(action, SET)
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#define GET(action) CHECKED(action, GET)
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bool
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IndirectWrapper::getPropertyDescriptor(JSContext *cx, JSObject *wrapper,
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jsid id, bool set,
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PropertyDescriptor *desc)
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{
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desc->obj = NULL; // default result if we refuse to perform this action
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CHECKED(IndirectProxyHandler::getPropertyDescriptor(cx, wrapper, id, set, desc),
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set ? SET : GET);
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}
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bool
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IndirectWrapper::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper,
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jsid id, bool set,
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PropertyDescriptor *desc)
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{
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desc->obj = NULL; // default result if we refuse to perform this action
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CHECKED(IndirectProxyHandler::getOwnPropertyDescriptor(cx, wrapper, id, set, desc), GET);
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}
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bool
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IndirectWrapper::defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
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PropertyDescriptor *desc)
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{
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SET(IndirectProxyHandler::defineProperty(cx, wrapper, id, desc));
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}
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bool
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IndirectWrapper::getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
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AutoIdVector &props)
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{
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// if we refuse to perform this action, props remains empty
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jsid id = JSID_VOID;
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GET(IndirectProxyHandler::getOwnPropertyNames(cx, wrapper, props));
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}
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bool
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IndirectWrapper::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
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{
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*bp = true; // default result if we refuse to perform this action
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SET(IndirectProxyHandler::delete_(cx, wrapper, id, bp));
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}
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bool
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IndirectWrapper::enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
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{
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// if we refuse to perform this action, props remains empty
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static jsid id = JSID_VOID;
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GET(IndirectProxyHandler::enumerate(cx, wrapper, props));
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}
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DirectWrapper::DirectWrapper(unsigned flags) : Wrapper(flags),
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DirectProxyHandler(&sWrapperFamily)
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{
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}
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DirectWrapper::~DirectWrapper()
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{
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}
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bool
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DirectWrapper::getPropertyDescriptor(JSContext *cx, JSObject *wrapper,
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jsid id, bool set,
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PropertyDescriptor *desc)
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{
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desc->obj = NULL; // default result if we refuse to perform this action
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CHECKED(DirectProxyHandler::getPropertyDescriptor(cx, wrapper, id, set, desc),
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set ? SET : GET);
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}
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bool
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DirectWrapper::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper,
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jsid id, bool set,
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PropertyDescriptor *desc)
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{
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desc->obj = NULL; // default result if we refuse to perform this action
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CHECKED(DirectProxyHandler::getOwnPropertyDescriptor(cx, wrapper, id, set, desc), GET);
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}
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bool
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DirectWrapper::defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
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PropertyDescriptor *desc)
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{
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SET(DirectProxyHandler::defineProperty(cx, wrapper, id, desc));
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}
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bool
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DirectWrapper::getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
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AutoIdVector &props)
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{
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// if we refuse to perform this action, props remains empty
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jsid id = JSID_VOID;
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GET(DirectProxyHandler::getOwnPropertyNames(cx, wrapper, props));
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}
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bool
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DirectWrapper::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
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{
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*bp = true; // default result if we refuse to perform this action
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SET(DirectProxyHandler::delete_(cx, wrapper, id, bp));
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}
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bool
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DirectWrapper::enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
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{
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// if we refuse to perform this action, props remains empty
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static jsid id = JSID_VOID;
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GET(DirectProxyHandler::enumerate(cx, wrapper, props));
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}
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bool
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DirectWrapper::has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
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{
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*bp = false; // default result if we refuse to perform this action
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GET(DirectProxyHandler::has(cx, wrapper, id, bp));
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}
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bool
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DirectWrapper::hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
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{
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*bp = false; // default result if we refuse to perform this action
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GET(DirectProxyHandler::hasOwn(cx, wrapper, id, bp));
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}
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bool
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DirectWrapper::get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, Value *vp)
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{
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vp->setUndefined(); // default result if we refuse to perform this action
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GET(DirectProxyHandler::get(cx, wrapper, receiver, id, vp));
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}
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bool
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DirectWrapper::set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
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Value *vp)
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{
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SET(DirectProxyHandler::set(cx, wrapper, receiver, id, strict, vp));
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}
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bool
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DirectWrapper::keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
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{
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// if we refuse to perform this action, props remains empty
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const jsid id = JSID_VOID;
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GET(DirectProxyHandler::keys(cx, wrapper, props));
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}
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bool
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DirectWrapper::iterate(JSContext *cx, JSObject *wrapper, unsigned flags, Value *vp)
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{
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vp->setUndefined(); // default result if we refuse to perform this action
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const jsid id = JSID_VOID;
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GET(DirectProxyHandler::iterate(cx, wrapper, flags, vp));
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}
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bool
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DirectWrapper::call(JSContext *cx, JSObject *wrapper, unsigned argc, Value *vp)
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{
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vp->setUndefined(); // default result if we refuse to perform this action
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const jsid id = JSID_VOID;
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CHECKED(IndirectProxyHandler::call(cx, wrapper, argc, vp), CALL);
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}
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bool
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DirectWrapper::construct(JSContext *cx, JSObject *wrapper, unsigned argc, Value *argv, Value *vp)
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{
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vp->setUndefined(); // default result if we refuse to perform this action
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const jsid id = JSID_VOID;
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CHECKED(IndirectProxyHandler::construct(cx, wrapper, argc, argv, vp), CALL);
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}
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bool
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DirectWrapper::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl, CallArgs args)
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{
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const jsid id = JSID_VOID;
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Rooted<JSObject*> wrapper(cx, &args.thisv().toObject());
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CHECKED(IndirectProxyHandler::nativeCall(cx, test, impl, args), CALL);
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}
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bool
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DirectWrapper::hasInstance(JSContext *cx, JSObject *wrapper, const Value *vp, bool *bp)
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{
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*bp = false; // default result if we refuse to perform this action
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const jsid id = JSID_VOID;
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GET(IndirectProxyHandler::hasInstance(cx, wrapper, vp, bp));
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}
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JSString *
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DirectWrapper::obj_toString(JSContext *cx, JSObject *wrapper)
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{
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bool status;
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if (!enter(cx, wrapper, JSID_VOID, GET, &status)) {
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if (status) {
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// Perform some default behavior that doesn't leak any information.
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return JS_NewStringCopyZ(cx, "[object Object]");
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}
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return NULL;
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}
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JSString *str = IndirectProxyHandler::obj_toString(cx, wrapper);
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return str;
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}
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JSString *
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DirectWrapper::fun_toString(JSContext *cx, JSObject *wrapper, unsigned indent)
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{
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bool status;
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if (!enter(cx, wrapper, JSID_VOID, GET, &status)) {
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if (status) {
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// Perform some default behavior that doesn't leak any information.
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if (wrapper->isCallable())
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return JS_NewStringCopyZ(cx, "function () {\n [native code]\n}");
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ReportIsNotFunction(cx, ObjectValue(*wrapper));
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return NULL;
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}
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return NULL;
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}
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JSString *str = IndirectProxyHandler::fun_toString(cx, wrapper, indent);
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return str;
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}
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DirectWrapper DirectWrapper::singleton((unsigned)0);
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/* Compartments. */
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namespace js {
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extern JSObject *
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TransparentObjectWrapper(JSContext *cx, JSObject *obj, JSObject *wrappedProto, JSObject *parent,
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unsigned flags)
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{
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// Allow wrapping outer window proxies.
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JS_ASSERT(!obj->isWrapper() || obj->getClass()->ext.innerObject);
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return Wrapper::New(cx, obj, wrappedProto, parent, &CrossCompartmentWrapper::singleton);
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}
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}
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ForceFrame::ForceFrame(JSContext *cx, JSObject *target)
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: context(cx),
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target(target),
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frame(NULL)
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{
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}
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ForceFrame::~ForceFrame()
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{
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context->delete_(frame);
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}
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bool
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ForceFrame::enter()
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{
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frame = context->new_<DummyFrameGuard>();
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if (!frame)
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return false;
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JS_ASSERT(context->compartment == target->compartment());
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JSCompartment *destination = context->compartment;
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JSObject &scopeChain = target->global();
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JS_ASSERT(scopeChain.isNative());
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return context->stack.pushDummyFrame(context, destination, scopeChain, frame);
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}
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AutoCompartment::AutoCompartment(JSContext *cx, JSObject *target)
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: context(cx),
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origin(cx->compartment),
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target(target),
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destination(target->compartment()),
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entered(false)
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{
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}
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AutoCompartment::~AutoCompartment()
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{
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if (entered)
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leave();
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}
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bool
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AutoCompartment::enter()
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{
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JS_ASSERT(!entered);
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if (origin != destination) {
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JSObject &scopeChain = target->global();
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JS_ASSERT(scopeChain.isNative());
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frame.construct();
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if (!context->stack.pushDummyFrame(context, destination, scopeChain, &frame.ref()))
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return false;
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if (context->isExceptionPending())
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context->wrapPendingException();
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}
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entered = true;
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return true;
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}
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void
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AutoCompartment::leave()
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{
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JS_ASSERT(entered);
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if (origin != destination) {
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frame.destroy();
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context->resetCompartment();
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}
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entered = false;
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}
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ErrorCopier::~ErrorCopier()
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{
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JSContext *cx = ac.context;
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if (cx->compartment == ac.destination &&
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ac.origin != ac.destination &&
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cx->isExceptionPending())
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{
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Value exc = cx->getPendingException();
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if (exc.isObject() && exc.toObject().isError() && exc.toObject().getPrivate()) {
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cx->clearPendingException();
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ac.leave();
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Rooted<JSObject*> errObj(cx, &exc.toObject());
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JSObject *copyobj = js_CopyErrorObject(cx, errObj, scope);
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if (copyobj)
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cx->setPendingException(ObjectValue(*copyobj));
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}
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}
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}
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/* Cross compartment wrappers. */
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CrossCompartmentWrapper::CrossCompartmentWrapper(unsigned flags)
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: DirectWrapper(CROSS_COMPARTMENT | flags)
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{
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}
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CrossCompartmentWrapper::~CrossCompartmentWrapper()
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{
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}
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#define PIERCE(cx, wrapper, mode, pre, op, post) \
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JS_BEGIN_MACRO \
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AutoCompartment call(cx, wrappedObject(wrapper)); \
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if (!call.enter()) \
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return false; \
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bool ok = (pre) && (op); \
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call.leave(); \
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return ok && (post); \
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JS_END_MACRO
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#define NOTHING (true)
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bool
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CrossCompartmentWrapper::getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
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bool set, PropertyDescriptor *desc)
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{
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PIERCE(cx, wrapper, set ? SET : GET,
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call.destination->wrapId(cx, &id),
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DirectWrapper::getPropertyDescriptor(cx, wrapper, id, set, desc),
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cx->compartment->wrap(cx, desc));
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}
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bool
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CrossCompartmentWrapper::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
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bool set, PropertyDescriptor *desc)
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{
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PIERCE(cx, wrapper, set ? SET : GET,
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call.destination->wrapId(cx, &id),
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DirectWrapper::getOwnPropertyDescriptor(cx, wrapper, id, set, desc),
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cx->compartment->wrap(cx, desc));
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}
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bool
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CrossCompartmentWrapper::defineProperty(JSContext *cx, JSObject *wrapper, jsid id, PropertyDescriptor *desc)
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{
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AutoPropertyDescriptorRooter desc2(cx, desc);
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PIERCE(cx, wrapper, SET,
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call.destination->wrapId(cx, &id) && call.destination->wrap(cx, &desc2),
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DirectWrapper::defineProperty(cx, wrapper, id, &desc2),
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NOTHING);
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}
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bool
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CrossCompartmentWrapper::getOwnPropertyNames(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
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{
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PIERCE(cx, wrapper, GET,
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NOTHING,
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DirectWrapper::getOwnPropertyNames(cx, wrapper, props),
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cx->compartment->wrap(cx, props));
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}
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bool
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CrossCompartmentWrapper::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
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{
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PIERCE(cx, wrapper, SET,
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call.destination->wrapId(cx, &id),
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DirectWrapper::delete_(cx, wrapper, id, bp),
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NOTHING);
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}
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bool
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CrossCompartmentWrapper::enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
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|
{
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PIERCE(cx, wrapper, GET,
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NOTHING,
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DirectWrapper::enumerate(cx, wrapper, props),
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cx->compartment->wrap(cx, props));
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}
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|
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bool
|
|
CrossCompartmentWrapper::has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
call.destination->wrapId(cx, &id),
|
|
DirectWrapper::has(cx, wrapper, id, bp),
|
|
NOTHING);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
call.destination->wrapId(cx, &id),
|
|
DirectWrapper::hasOwn(cx, wrapper, id, bp),
|
|
NOTHING);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, Value *vp)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
call.destination->wrap(cx, &receiver) && call.destination->wrapId(cx, &id),
|
|
DirectWrapper::get(cx, wrapper, receiver, id, vp),
|
|
cx->compartment->wrap(cx, vp));
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::set(JSContext *cx, JSObject *wrapper_, JSObject *receiver_, jsid id_,
|
|
bool strict, Value *vp)
|
|
{
|
|
RootedObject wrapper(cx, wrapper_), receiver(cx, receiver_);
|
|
RootedId id(cx, id_);
|
|
RootedValue value(cx, *vp);
|
|
PIERCE(cx, wrapper, SET,
|
|
call.destination->wrap(cx, receiver.address()) &&
|
|
call.destination->wrapId(cx, id.address()) &&
|
|
call.destination->wrap(cx, value.address()),
|
|
DirectWrapper::set(cx, wrapper, receiver, id, strict, value.address()),
|
|
NOTHING);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
NOTHING,
|
|
DirectWrapper::keys(cx, wrapper, props),
|
|
cx->compartment->wrap(cx, props));
|
|
}
|
|
|
|
/*
|
|
* We can reify non-escaping iterator objects instead of having to wrap them. This
|
|
* allows fast iteration over objects across a compartment boundary.
|
|
*/
|
|
static bool
|
|
CanReify(Value *vp)
|
|
{
|
|
JSObject *obj;
|
|
return vp->isObject() &&
|
|
(obj = &vp->toObject())->getClass() == &IteratorClass &&
|
|
(obj->getNativeIterator()->flags & JSITER_ENUMERATE);
|
|
}
|
|
|
|
struct AutoCloseIterator
|
|
{
|
|
AutoCloseIterator(JSContext *cx, JSObject *obj) : cx(cx), obj(obj) {}
|
|
|
|
~AutoCloseIterator() { if (obj) CloseIterator(cx, obj); }
|
|
|
|
void clear() { obj = NULL; }
|
|
|
|
private:
|
|
JSContext *cx;
|
|
JSObject *obj;
|
|
};
|
|
|
|
static bool
|
|
Reify(JSContext *cx, JSCompartment *origin, Value *vp)
|
|
{
|
|
JSObject *iterObj = &vp->toObject();
|
|
NativeIterator *ni = iterObj->getNativeIterator();
|
|
|
|
AutoCloseIterator close(cx, iterObj);
|
|
|
|
/* Wrap the iteratee. */
|
|
RootedObject obj(cx, ni->obj);
|
|
if (!origin->wrap(cx, obj.address()))
|
|
return false;
|
|
|
|
/*
|
|
* Wrap the elements in the iterator's snapshot.
|
|
* N.B. the order of closing/creating iterators is important due to the
|
|
* implicit cx->enumerators state.
|
|
*/
|
|
size_t length = ni->numKeys();
|
|
bool isKeyIter = ni->isKeyIter();
|
|
AutoIdVector keys(cx);
|
|
if (length > 0) {
|
|
if (!keys.reserve(length))
|
|
return false;
|
|
for (size_t i = 0; i < length; ++i) {
|
|
jsid id;
|
|
if (!ValueToId(cx, StringValue(ni->begin()[i]), &id))
|
|
return false;
|
|
keys.infallibleAppend(id);
|
|
if (!origin->wrapId(cx, &keys[i]))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
close.clear();
|
|
if (!CloseIterator(cx, iterObj))
|
|
return false;
|
|
|
|
if (isKeyIter)
|
|
return VectorToKeyIterator(cx, obj, ni->flags, keys, vp);
|
|
return VectorToValueIterator(cx, obj, ni->flags, keys, vp);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::iterate(JSContext *cx, JSObject *wrapper, unsigned flags, Value *vp)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
NOTHING,
|
|
DirectWrapper::iterate(cx, wrapper, flags, vp),
|
|
CanReify(vp) ? Reify(cx, cx->compartment, vp) : cx->compartment->wrap(cx, vp));
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::call(JSContext *cx, JSObject *wrapper_, unsigned argc, Value *vp)
|
|
{
|
|
RootedObject wrapper(cx, wrapper_);
|
|
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return false;
|
|
|
|
vp[0] = ObjectValue(*call.target);
|
|
if (!call.destination->wrap(cx, &vp[1]))
|
|
return false;
|
|
Value *argv = JS_ARGV(cx, vp);
|
|
for (size_t n = 0; n < argc; ++n) {
|
|
if (!call.destination->wrap(cx, &argv[n]))
|
|
return false;
|
|
}
|
|
if (!DirectWrapper::call(cx, wrapper, argc, vp))
|
|
return false;
|
|
|
|
call.leave();
|
|
return cx->compartment->wrap(cx, vp);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::construct(JSContext *cx, JSObject *wrapper_, unsigned argc, Value *argv,
|
|
Value *rval)
|
|
{
|
|
RootedObject wrapper(cx, wrapper_);
|
|
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return false;
|
|
|
|
for (size_t n = 0; n < argc; ++n) {
|
|
if (!call.destination->wrap(cx, &argv[n]))
|
|
return false;
|
|
}
|
|
if (!DirectWrapper::construct(cx, wrapper, argc, argv, rval))
|
|
return false;
|
|
|
|
call.leave();
|
|
return cx->compartment->wrap(cx, rval);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
|
|
CallArgs srcArgs)
|
|
{
|
|
Rooted<JSObject*> wrapper(cx, &srcArgs.thisv().toObject());
|
|
JS_ASSERT(srcArgs.thisv().isMagic(JS_IS_CONSTRUCTING) ||
|
|
!UnwrapObject(wrapper)->isCrossCompartmentWrapper());
|
|
|
|
Rooted<JSObject*> wrapped(cx, wrappedObject(wrapper));
|
|
AutoCompartment call(cx, wrapped);
|
|
if (!call.enter())
|
|
return false;
|
|
|
|
InvokeArgsGuard dstArgs;
|
|
if (!cx->stack.pushInvokeArgs(cx, srcArgs.length(), &dstArgs))
|
|
return false;
|
|
|
|
Value *src = srcArgs.base();
|
|
Value *srcend = srcArgs.array() + srcArgs.length();
|
|
Value *dst = dstArgs.base();
|
|
for (; src < srcend; ++src, ++dst) {
|
|
*dst = *src;
|
|
if (!call.destination->wrap(cx, dst))
|
|
return false;
|
|
}
|
|
|
|
if (!CallNonGenericMethod(cx, test, impl, dstArgs))
|
|
return false;
|
|
|
|
srcArgs.rval() = dstArgs.rval();
|
|
dstArgs.pop();
|
|
call.leave();
|
|
return cx->compartment->wrap(cx, &srcArgs.rval());
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::hasInstance(JSContext *cx, JSObject *wrapper, const Value *vp, bool *bp)
|
|
{
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return false;
|
|
|
|
Value v = *vp;
|
|
if (!call.destination->wrap(cx, &v))
|
|
return false;
|
|
return DirectWrapper::hasInstance(cx, wrapper, &v, bp);
|
|
}
|
|
|
|
JSString *
|
|
CrossCompartmentWrapper::obj_toString(JSContext *cx, JSObject *wrapper)
|
|
{
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return NULL;
|
|
|
|
JSString *str = DirectWrapper::obj_toString(cx, wrapper);
|
|
if (!str)
|
|
return NULL;
|
|
|
|
call.leave();
|
|
if (!cx->compartment->wrap(cx, &str))
|
|
return NULL;
|
|
return str;
|
|
}
|
|
|
|
JSString *
|
|
CrossCompartmentWrapper::fun_toString(JSContext *cx, JSObject *wrapper, unsigned indent)
|
|
{
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return NULL;
|
|
|
|
JSString *str = DirectWrapper::fun_toString(cx, wrapper, indent);
|
|
if (!str)
|
|
return NULL;
|
|
|
|
call.leave();
|
|
if (!cx->compartment->wrap(cx, &str))
|
|
return NULL;
|
|
return str;
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::defaultValue(JSContext *cx, JSObject *wrapper, JSType hint, Value *vp)
|
|
{
|
|
AutoCompartment call(cx, wrappedObject(wrapper));
|
|
if (!call.enter())
|
|
return false;
|
|
|
|
if (!IndirectProxyHandler::defaultValue(cx, wrapper, hint, vp))
|
|
return false;
|
|
|
|
call.leave();
|
|
return cx->compartment->wrap(cx, vp);
|
|
}
|
|
|
|
bool
|
|
CrossCompartmentWrapper::iteratorNext(JSContext *cx, JSObject *wrapper, Value *vp)
|
|
{
|
|
PIERCE(cx, wrapper, GET,
|
|
NOTHING,
|
|
IndirectProxyHandler::iteratorNext(cx, wrapper, vp),
|
|
cx->compartment->wrap(cx, vp));
|
|
}
|
|
|
|
CrossCompartmentWrapper CrossCompartmentWrapper::singleton(0u);
|
|
|
|
/* Security wrappers. */
|
|
|
|
template <class Base>
|
|
SecurityWrapper<Base>::SecurityWrapper(unsigned flags)
|
|
: Base(flags)
|
|
{}
|
|
|
|
template <class Base>
|
|
bool
|
|
SecurityWrapper<Base>::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
|
|
CallArgs args)
|
|
{
|
|
/*
|
|
* Let this through until compartment-per-global lets us have stronger
|
|
* invariants wrt document.domain (bug 714547).
|
|
*/
|
|
return Base::nativeCall(cx, test, impl, args);
|
|
}
|
|
|
|
template <class Base>
|
|
bool
|
|
SecurityWrapper<Base>::objectClassIs(JSObject *obj, ESClassValue classValue, JSContext *cx)
|
|
{
|
|
/*
|
|
* Let this through until compartment-per-global lets us have stronger
|
|
* invariants wrt document.domain (bug 714547).
|
|
*/
|
|
return Base::objectClassIs(obj, classValue, cx);
|
|
}
|
|
|
|
template <class Base>
|
|
bool
|
|
SecurityWrapper<Base>::regexp_toShared(JSContext *cx, JSObject *obj, RegExpGuard *g)
|
|
{
|
|
return Base::regexp_toShared(cx, obj, g);
|
|
}
|
|
|
|
|
|
template class js::SecurityWrapper<DirectWrapper>;
|
|
template class js::SecurityWrapper<CrossCompartmentWrapper>;
|
|
|
|
class JS_FRIEND_API(DeadObjectProxy) : public BaseProxyHandler
|
|
{
|
|
private:
|
|
static int sDeadObjectFamily;
|
|
public:
|
|
|
|
explicit DeadObjectProxy();
|
|
|
|
/* ES5 Harmony fundamental wrapper traps. */
|
|
virtual bool getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
|
|
PropertyDescriptor *desc) MOZ_OVERRIDE;
|
|
virtual bool getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
|
|
PropertyDescriptor *desc) MOZ_OVERRIDE;
|
|
virtual bool defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
|
|
PropertyDescriptor *desc) MOZ_OVERRIDE;
|
|
virtual bool getOwnPropertyNames(JSContext *cx, JSObject *wrapper, AutoIdVector &props) MOZ_OVERRIDE;
|
|
virtual bool delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp) MOZ_OVERRIDE;
|
|
virtual bool enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props) MOZ_OVERRIDE;
|
|
|
|
/* Spidermonkey extensions. */
|
|
virtual bool call(JSContext *cx, JSObject *proxy, unsigned argc, Value *vp);
|
|
virtual bool construct(JSContext *cx, JSObject *proxy, unsigned argc, Value *argv, Value *rval);
|
|
virtual bool nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
|
|
CallArgs args) MOZ_OVERRIDE;
|
|
virtual bool hasInstance(JSContext *cx, JSObject *proxy, const Value *vp, bool *bp);
|
|
virtual bool objectClassIs(JSObject *obj, ESClassValue classValue, JSContext *cx);
|
|
virtual JSString *obj_toString(JSContext *cx, JSObject *proxy);
|
|
virtual JSString *fun_toString(JSContext *cx, JSObject *proxy, unsigned indent);
|
|
virtual bool regexp_toShared(JSContext *cx, JSObject *proxy, RegExpGuard *g);
|
|
virtual bool defaultValue(JSContext *cx, JSObject *obj, JSType hint, Value *vp);
|
|
virtual bool iteratorNext(JSContext *cx, JSObject *proxy, Value *vp);
|
|
virtual bool getElementIfPresent(JSContext *cx, JSObject *obj, JSObject *receiver,
|
|
uint32_t index, Value *vp, bool *present);
|
|
|
|
|
|
static DeadObjectProxy singleton;
|
|
};
|
|
|
|
DeadObjectProxy::DeadObjectProxy()
|
|
: BaseProxyHandler(&sDeadObjectFamily)
|
|
{
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::getPropertyDescriptor(JSContext *cx, JSObject *wrapper,
|
|
jsid id, bool set,
|
|
PropertyDescriptor *desc)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper,
|
|
jsid id, bool set,
|
|
PropertyDescriptor *desc)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::defineProperty(JSContext *cx, JSObject *wrapper, jsid id,
|
|
PropertyDescriptor *desc)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::getOwnPropertyNames(JSContext *cx, JSObject *wrapper,
|
|
AutoIdVector &props)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::enumerate(JSContext *cx, JSObject *wrapper,
|
|
AutoIdVector &props)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::call(JSContext *cx, JSObject *wrapper, unsigned argc, Value *vp)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::construct(JSContext *cx, JSObject *wrapper, unsigned argc,
|
|
Value *vp, Value *rval)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::nativeCall(JSContext *cx, IsAcceptableThis test, NativeImpl impl, CallArgs args)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::hasInstance(JSContext *cx, JSObject *proxy, const Value *vp,
|
|
bool *bp)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::objectClassIs(JSObject *obj, ESClassValue classValue, JSContext *cx)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
JSString *
|
|
DeadObjectProxy::obj_toString(JSContext *cx, JSObject *wrapper)
|
|
{
|
|
return JS_NewStringCopyZ(cx, "[object DeadObject]");
|
|
}
|
|
|
|
JSString *
|
|
DeadObjectProxy::fun_toString(JSContext *cx, JSObject *proxy, unsigned indent)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::regexp_toShared(JSContext *cx, JSObject *proxy, RegExpGuard *g)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::defaultValue(JSContext *cx, JSObject *obj, JSType hint, Value *vp)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::iteratorNext(JSContext *cx, JSObject *proxy, Value *vp)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
DeadObjectProxy::getElementIfPresent(JSContext *cx, JSObject *obj, JSObject *receiver,
|
|
uint32_t index, Value *vp, bool *present)
|
|
{
|
|
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_DEAD_OBJECT);
|
|
return false;
|
|
}
|
|
|
|
DeadObjectProxy DeadObjectProxy::singleton;
|
|
int DeadObjectProxy::sDeadObjectFamily;
|
|
|
|
void
|
|
js::NukeCrossCompartmentWrapper(JSObject *wrapper)
|
|
{
|
|
JS_ASSERT(IsCrossCompartmentWrapper(wrapper));
|
|
|
|
SetProxyPrivate(wrapper, NullValue());
|
|
SetProxyHandler(wrapper, &DeadObjectProxy::singleton);
|
|
|
|
if (IsFunctionProxy(wrapper)) {
|
|
wrapper->setReservedSlot(JSSLOT_PROXY_CALL, NullValue());
|
|
wrapper->setReservedSlot(JSSLOT_PROXY_CONSTRUCT, NullValue());
|
|
}
|
|
|
|
wrapper->setReservedSlot(JSSLOT_PROXY_EXTRA + 0, NullValue());
|
|
wrapper->setReservedSlot(JSSLOT_PROXY_EXTRA + 1, NullValue());
|
|
}
|
|
|
|
/*
|
|
* NukeChromeCrossCompartmentWrappersForGlobal reaches into chrome and cuts
|
|
* all of the cross-compartment wrappers that point to objects parented to
|
|
* obj's global. The snag here is that we need to avoid cutting wrappers that
|
|
* point to the window object on page navigation (inner window destruction)
|
|
* and only do that on tab close (outer window destruction). Thus the
|
|
* option of how to handle the global object.
|
|
*/
|
|
JS_FRIEND_API(JSBool)
|
|
js::NukeCrossCompartmentWrappers(JSContext* cx,
|
|
const CompartmentFilter& sourceFilter,
|
|
const CompartmentFilter& targetFilter,
|
|
js::NukedGlobalHandling nukeGlobal)
|
|
{
|
|
CHECK_REQUEST(cx);
|
|
JSRuntime *rt = cx->runtime;
|
|
|
|
// Iterate through scopes looking for system cross compartment wrappers
|
|
// that point to an object that shares a global with obj.
|
|
|
|
for (CompartmentsIter c(rt); !c.done(); c.next()) {
|
|
// Skip non-system compartments because this breaks the web.
|
|
if (!sourceFilter.match(c))
|
|
continue;
|
|
|
|
// Iterate the wrappers looking for anything interesting.
|
|
WrapperMap &pmap = c->crossCompartmentWrappers;
|
|
for (WrapperMap::Enum e(pmap); !e.empty(); e.popFront()) {
|
|
// Some cross-compartment wrappers are for strings. We're not
|
|
// interested in those.
|
|
const CrossCompartmentKey &k = e.front().key;
|
|
if (k.kind != CrossCompartmentKey::ObjectWrapper)
|
|
continue;
|
|
|
|
JSObject *wobj = &e.front().value.get().toObject();
|
|
JSObject *wrapped = UnwrapObject(wobj, false);
|
|
|
|
if (nukeGlobal == DontNukeForGlobalObject && wrapped->isGlobal())
|
|
continue;
|
|
|
|
if (targetFilter.match(wrapped->compartment())) {
|
|
// We found a wrapper to nuke.
|
|
e.removeFront();
|
|
NukeCrossCompartmentWrapper(wobj);
|
|
}
|
|
}
|
|
}
|
|
|
|
return JS_TRUE;
|
|
}
|
|
|
|
// Given a cross-compartment wrapper |wobj|, update it to point to
|
|
// |newTarget|. This recomputes the wrapper with JS_WrapValue, and thus can be
|
|
// useful even if wrapper already points to newTarget.
|
|
bool
|
|
js::RemapWrapper(JSContext *cx, JSObject *wobj, JSObject *newTarget)
|
|
{
|
|
JS_ASSERT(IsCrossCompartmentWrapper(wobj));
|
|
JSObject *origTarget = Wrapper::wrappedObject(wobj);
|
|
JS_ASSERT(origTarget);
|
|
Value origv = ObjectValue(*origTarget);
|
|
JSCompartment *wcompartment = wobj->compartment();
|
|
WrapperMap &pmap = wcompartment->crossCompartmentWrappers;
|
|
|
|
// When we remove origv from the wrapper map, its wrapper, wobj, must
|
|
// immediately cease to be a cross-compartment wrapper. Neuter it.
|
|
JS_ASSERT(pmap.lookup(origv));
|
|
pmap.remove(origv);
|
|
NukeCrossCompartmentWrapper(wobj);
|
|
|
|
// First, we wrap it in the new compartment. This will return
|
|
// a new wrapper.
|
|
AutoCompartment ac(cx, wobj);
|
|
JSObject *tobj = newTarget;
|
|
if (!ac.enter() || !wcompartment->wrap(cx, &tobj))
|
|
return false;
|
|
|
|
// Now, because we need to maintain object identity, we do a
|
|
// brain transplant on the old object. At the same time, we
|
|
// update the entry in the compartment's wrapper map to point
|
|
// to the old wrapper.
|
|
JS_ASSERT(tobj != wobj);
|
|
if (!wobj->swap(cx, tobj))
|
|
return false;
|
|
pmap.put(ObjectValue(*newTarget), ObjectValue(*wobj));
|
|
|
|
return true;
|
|
}
|
|
|
|
// Remap all cross-compartment wrappers pointing to |oldTarget| to point to
|
|
// |newTarget|. All wrappers are recomputed.
|
|
bool
|
|
js::RemapAllWrappersForObject(JSContext *cx, JSObject *oldTarget,
|
|
JSObject *newTarget)
|
|
{
|
|
Value origv = ObjectValue(*oldTarget);
|
|
|
|
AutoValueVector toTransplant(cx);
|
|
if (!toTransplant.reserve(cx->runtime->compartments.length()))
|
|
return false;
|
|
|
|
for (CompartmentsIter c(cx->runtime); !c.done(); c.next()) {
|
|
WrapperMap &pmap = c->crossCompartmentWrappers;
|
|
if (WrapperMap::Ptr wp = pmap.lookup(origv)) {
|
|
// We found a wrapper. Remember and root it.
|
|
toTransplant.infallibleAppend(wp->value);
|
|
}
|
|
}
|
|
|
|
for (Value *begin = toTransplant.begin(), *end = toTransplant.end();
|
|
begin != end; ++begin)
|
|
{
|
|
if (!RemapWrapper(cx, &begin->toObject(), newTarget))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
JS_FRIEND_API(bool)
|
|
js::RecomputeWrappers(JSContext *cx, const CompartmentFilter &sourceFilter,
|
|
const CompartmentFilter &targetFilter)
|
|
{
|
|
AutoValueVector toRecompute(cx);
|
|
|
|
for (CompartmentsIter c(cx->runtime); !c.done(); c.next()) {
|
|
// Filter by source compartment.
|
|
if (!sourceFilter.match(c))
|
|
continue;
|
|
|
|
// Iterate over the wrappers, filtering appropriately.
|
|
WrapperMap &pmap = c->crossCompartmentWrappers;
|
|
for (WrapperMap::Enum e(pmap); !e.empty(); e.popFront()) {
|
|
// Filter out non-objects.
|
|
const CrossCompartmentKey &k = e.front().key;
|
|
if (k.kind != CrossCompartmentKey::ObjectWrapper)
|
|
continue;
|
|
|
|
// Filter by target compartment.
|
|
Value wrapper = e.front().value.get();
|
|
if (!targetFilter.match(k.wrapped->compartment()))
|
|
continue;
|
|
|
|
// Add it to the list.
|
|
if (!toRecompute.append(wrapper))
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// Recompute all the wrappers in the list.
|
|
for (Value *begin = toRecompute.begin(), *end = toRecompute.end(); begin != end; ++begin)
|
|
{
|
|
JSObject *wrapper = &begin->toObject();
|
|
JSObject *wrapped = Wrapper::wrappedObject(wrapper);
|
|
if (!RemapWrapper(cx, wrapper, wrapped))
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|