https://github.com/mozilla/gecko-dev
Tip revision: 5f24fec84abd5346efbd69608afbe8842648ab50 authored by ffxbld on 10 July 2012, 19:18:22 UTC
Added FENNEC_14_0b12_RELEASE FENNEC_14_0b12_BUILD1 tag(s) for changeset f0f236ff96dd. DONTBUILD CLOSED TREE a=release
Added FENNEC_14_0b12_RELEASE FENNEC_14_0b12_BUILD1 tag(s) for changeset f0f236ff96dd. DONTBUILD CLOSED TREE a=release
Tip revision: 5f24fec
jswrapper.cpp
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=4 sw=4 et tw=99:
*
* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
* May 28, 2008.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Andreas Gal <gal@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "jsapi.h"
#include "jscntxt.h"
#include "jsexn.h"
#include "jsgc.h"
#include "jsgcmark.h"
#include "jsiter.h"
#include "jsnum.h"
#include "jswrapper.h"
#include "methodjit/PolyIC.h"
#include "methodjit/MonoIC.h"
#ifdef JS_METHODJIT
# include "assembler/jit/ExecutableAllocator.h"
#endif
#include "jscompartment.h"
#include "jsobjinlines.h"
#include "vm/RegExpObject-inl.h"
using namespace js;
using namespace js::gc;
namespace js {
int sWrapperFamily;
}
void *
Wrapper::getWrapperFamily()
{
return &sWrapperFamily;
}
JS_FRIEND_API(JSObject *)
js::UnwrapObject(JSObject *wrapped, bool stopAtOuter, unsigned *flagsp)
{
unsigned flags = 0;
while (wrapped->isWrapper() &&
!JS_UNLIKELY(stopAtOuter && wrapped->getClass()->ext.innerObject)) {
flags |= static_cast<Wrapper *>(GetProxyHandler(wrapped))->flags();
wrapped = GetProxyPrivate(wrapped).toObjectOrNull();
}
if (flagsp)
*flagsp = flags;
return wrapped;
}
JS_FRIEND_API(JSObject *)
js::UnwrapObjectChecked(JSContext *cx, JSObject *obj)
{
while (obj->isWrapper() &&
!JS_UNLIKELY(!!obj->getClass()->ext.innerObject)) {
JSObject *wrapper = obj;
AbstractWrapper *handler = AbstractWrapper::wrapperHandler(obj);
bool rvOnFailure;
if (!handler->enter(cx, wrapper, JSID_VOID,
Wrapper::PUNCTURE, &rvOnFailure))
return rvOnFailure ? obj : NULL;
obj = Wrapper::wrappedObject(obj);
JS_ASSERT(obj);
handler->leave(cx, wrapper);
}
return obj;
}
bool
js::IsCrossCompartmentWrapper(const JSObject *wrapper)
{
return wrapper->isWrapper() &&
!!(Wrapper::wrapperHandler(wrapper)->flags() & Wrapper::CROSS_COMPARTMENT);
}
AbstractWrapper::AbstractWrapper(unsigned flags) :
ProxyHandler(&sWrapperFamily),
mFlags(flags)
{
}
Wrapper::Wrapper(unsigned flags) : AbstractWrapper(flags)
{
}
Wrapper::~Wrapper()
{
}
#define CHECKED(op, act) \
JS_BEGIN_MACRO \
bool status; \
if (!enter(cx, wrapper, id, act, &status)) \
return status; \
bool ok = (op); \
leave(cx, wrapper); \
return ok; \
JS_END_MACRO
#define SET(action) CHECKED(action, SET)
#define GET(action) CHECKED(action, GET)
bool
AbstractWrapper::getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
PropertyDescriptor *desc)
{
desc->obj = NULL; // default result if we refuse to perform this action
CHECKED(JS_GetPropertyDescriptorById(cx, wrappedObject(wrapper), id, JSRESOLVE_QUALIFIED, desc),
set ? SET : GET);
}
static bool
GetOwnPropertyDescriptor(JSContext *cx, JSObject *obj, jsid id, unsigned flags, JSPropertyDescriptor *desc)
{
// If obj is a proxy, we can do better than just guessing. This is
// important for certain types of wrappers that wrap other wrappers.
if (obj->isProxy())
return Proxy::getOwnPropertyDescriptor(cx, obj, id, flags & JSRESOLVE_ASSIGNING, desc);
if (!JS_GetPropertyDescriptorById(cx, obj, id, flags, desc))
return false;
if (desc->obj != obj)
desc->obj = NULL;
return true;
}
bool
AbstractWrapper::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id, bool set,
PropertyDescriptor *desc)
{
desc->obj = NULL; // default result if we refuse to perform this action
CHECKED(GetOwnPropertyDescriptor(cx, wrappedObject(wrapper), id, JSRESOLVE_QUALIFIED, desc),
set ? SET : GET);
}
bool
AbstractWrapper::defineProperty(JSContext *cx, JSObject *wrapper, jsid id, PropertyDescriptor *desc)
{
SET(JS_DefinePropertyById(cx, wrappedObject(wrapper), id, desc->value,
desc->getter, desc->setter, desc->attrs));
}
bool
AbstractWrapper::getOwnPropertyNames(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
// if we refuse to perform this action, props remains empty
jsid id = JSID_VOID;
GET(GetPropertyNames(cx, wrappedObject(wrapper), JSITER_OWNONLY | JSITER_HIDDEN, &props));
}
static bool
ValueToBoolean(Value *vp, bool *bp)
{
*bp = js_ValueToBoolean(*vp);
return true;
}
bool
AbstractWrapper::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
{
*bp = true; // default result if we refuse to perform this action
Value v;
SET(JS_DeletePropertyById2(cx, wrappedObject(wrapper), id, &v) &&
ValueToBoolean(&v, bp));
}
bool
AbstractWrapper::enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
// if we refuse to perform this action, props remains empty
static jsid id = JSID_VOID;
GET(GetPropertyNames(cx, wrappedObject(wrapper), 0, &props));
}
bool
AbstractWrapper::fix(JSContext *cx, JSObject *wrapper, Value *vp)
{
vp->setUndefined();
return true;
}
static bool
Cond(JSBool b, bool *bp)
{
*bp = !!b;
return true;
}
bool
Wrapper::has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
{
*bp = false; // default result if we refuse to perform this action
JSBool found;
GET(JS_HasPropertyById(cx, wrappedObject(wrapper), id, &found) &&
Cond(found, bp));
}
bool
Wrapper::hasOwn(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
{
*bp = false; // default result if we refuse to perform this action
PropertyDescriptor desc;
JSObject *wobj = wrappedObject(wrapper);
GET(JS_GetPropertyDescriptorById(cx, wobj, id, JSRESOLVE_QUALIFIED, &desc) &&
Cond(desc.obj == wobj, bp));
}
bool
Wrapper::get(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, Value *vp)
{
vp->setUndefined(); // default result if we refuse to perform this action
GET(wrappedObject(wrapper)->getGeneric(cx, receiver, id, vp));
}
bool
Wrapper::set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id, bool strict,
Value *vp)
{
SET(wrappedObject(wrapper)->setGeneric(cx, id, vp, strict));
}
bool
Wrapper::keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
// if we refuse to perform this action, props remains empty
const jsid id = JSID_VOID;
GET(GetPropertyNames(cx, wrappedObject(wrapper), JSITER_OWNONLY, &props));
}
bool
Wrapper::iterate(JSContext *cx, JSObject *wrapper, unsigned flags, Value *vp)
{
vp->setUndefined(); // default result if we refuse to perform this action
const jsid id = JSID_VOID;
GET(GetIterator(cx, RootedVarObject(cx, wrappedObject(wrapper)), flags, vp));
}
bool
Wrapper::call(JSContext *cx, JSObject *wrapper, unsigned argc, Value *vp)
{
vp->setUndefined(); // default result if we refuse to perform this action
const jsid id = JSID_VOID;
CHECKED(ProxyHandler::call(cx, wrapper, argc, vp), CALL);
}
bool
Wrapper::construct(JSContext *cx, JSObject *wrapper, unsigned argc, Value *argv, Value *vp)
{
vp->setUndefined(); // default result if we refuse to perform this action
const jsid id = JSID_VOID;
GET(ProxyHandler::construct(cx, wrapper, argc, argv, vp));
}
bool
Wrapper::nativeCall(JSContext *cx, JSObject *wrapper, Class *clasp, Native native, CallArgs args)
{
const jsid id = JSID_VOID;
CHECKED(CallJSNative(cx, native, args), CALL);
}
bool
Wrapper::hasInstance(JSContext *cx, JSObject *wrapper, const Value *vp, bool *bp)
{
*bp = false; // default result if we refuse to perform this action
const jsid id = JSID_VOID;
JSBool b = JS_FALSE;
GET(JS_HasInstance(cx, wrappedObject(wrapper), *vp, &b) && Cond(b, bp));
}
JSType
Wrapper::typeOf(JSContext *cx, JSObject *wrapper)
{
return TypeOfValue(cx, ObjectValue(*wrappedObject(wrapper)));
}
bool
Wrapper::objectClassIs(JSObject *wrapper, ESClassValue classValue, JSContext *cx)
{
return ObjectClassIs(*wrappedObject(wrapper), classValue, cx);
}
JSString *
Wrapper::obj_toString(JSContext *cx, JSObject *wrapper)
{
bool status;
if (!enter(cx, wrapper, JSID_VOID, GET, &status)) {
if (status) {
// Perform some default behavior that doesn't leak any information.
return JS_NewStringCopyZ(cx, "[object Object]");
}
return NULL;
}
JSString *str = obj_toStringHelper(cx, wrappedObject(wrapper));
leave(cx, wrapper);
return str;
}
JSString *
Wrapper::fun_toString(JSContext *cx, JSObject *wrapper, unsigned indent)
{
bool status;
if (!enter(cx, wrapper, JSID_VOID, GET, &status)) {
if (status) {
// Perform some default behavior that doesn't leak any information.
if (wrapper->isCallable())
return JS_NewStringCopyZ(cx, "function () {\n [native code]\n}");
js::Value v = ObjectValue(*wrapper);
js_ReportIsNotFunction(cx, &v, 0);
return NULL;
}
return NULL;
}
JSString *str = ProxyHandler::fun_toString(cx, wrapper, indent);
leave(cx, wrapper);
return str;
}
bool
Wrapper::regexp_toShared(JSContext *cx, JSObject *wrapper, RegExpGuard *g)
{
return RegExpToShared(cx, *wrappedObject(wrapper), g);
}
bool
Wrapper::defaultValue(JSContext *cx, JSObject *wrapper, JSType hint, Value *vp)
{
*vp = ObjectValue(*wrappedObject(wrapper));
if (hint == JSTYPE_VOID)
return ToPrimitive(cx, vp);
return ToPrimitive(cx, hint, vp);
}
bool
Wrapper::iteratorNext(JSContext *cx, JSObject *wrapper, Value *vp)
{
if (!js_IteratorMore(cx, RootedVarObject(cx, wrappedObject(wrapper)), vp))
return false;
if (vp->toBoolean()) {
*vp = cx->iterValue;
cx->iterValue.setUndefined();
} else {
vp->setMagic(JS_NO_ITER_VALUE);
}
return true;
}
void
Wrapper::trace(JSTracer *trc, JSObject *wrapper)
{
MarkSlot(trc, &wrapper->getReservedSlotRef(JSSLOT_PROXY_PRIVATE), "wrappedObject");
}
JSObject *
AbstractWrapper::wrappedObject(const JSObject *wrapper)
{
return GetProxyPrivate(wrapper).toObjectOrNull();
}
AbstractWrapper *
AbstractWrapper::wrapperHandler(const JSObject *wrapper)
{
JS_ASSERT(wrapper->isWrapper());
return static_cast<AbstractWrapper *>(GetProxyHandler(wrapper));
}
bool
AbstractWrapper::enter(JSContext *cx, JSObject *wrapper, jsid id, Action act, bool *bp)
{
*bp = true;
return true;
}
void
AbstractWrapper::leave(JSContext *cx, JSObject *wrapper)
{
}
Wrapper Wrapper::singleton((unsigned)0);
JSObject *
Wrapper::New(JSContext *cx, JSObject *obj, JSObject *proto, JSObject *parent, Wrapper *handler)
{
JS_ASSERT(parent);
if (obj->isXML()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_WRAP_XML_OBJECT);
return NULL;
}
return NewProxyObject(cx, handler, ObjectValue(*obj), proto, parent,
obj->isCallable() ? obj : NULL, NULL);
}
/* Compartments. */
namespace js {
extern JSObject *
TransparentObjectWrapper(JSContext *cx, JSObject *obj, JSObject *wrappedProto, JSObject *parent,
unsigned flags)
{
// Allow wrapping outer window proxies.
JS_ASSERT(!obj->isWrapper() || obj->getClass()->ext.innerObject);
return Wrapper::New(cx, obj, wrappedProto, parent, &CrossCompartmentWrapper::singleton);
}
}
ForceFrame::ForceFrame(JSContext *cx, JSObject *target)
: context(cx),
target(target),
frame(NULL)
{
}
ForceFrame::~ForceFrame()
{
context->delete_(frame);
}
bool
ForceFrame::enter()
{
frame = context->new_<DummyFrameGuard>();
if (!frame)
return false;
JS_ASSERT(context->compartment == target->compartment());
JSCompartment *destination = context->compartment;
JSObject &scopeChain = target->global();
JS_ASSERT(scopeChain.isNative());
return context->stack.pushDummyFrame(context, destination, scopeChain, frame);
}
AutoCompartment::AutoCompartment(JSContext *cx, JSObject *target)
: context(cx),
origin(cx->compartment),
target(target),
destination(target->compartment()),
entered(false)
{
}
AutoCompartment::~AutoCompartment()
{
if (entered)
leave();
}
bool
AutoCompartment::enter()
{
JS_ASSERT(!entered);
if (origin != destination) {
JSObject &scopeChain = target->global();
JS_ASSERT(scopeChain.isNative());
frame.construct();
if (!context->stack.pushDummyFrame(context, destination, scopeChain, &frame.ref()))
return false;
if (context->isExceptionPending())
context->wrapPendingException();
}
entered = true;
return true;
}
void
AutoCompartment::leave()
{
JS_ASSERT(entered);
if (origin != destination) {
frame.destroy();
context->resetCompartment();
}
entered = false;
}
ErrorCopier::~ErrorCopier()
{
JSContext *cx = ac.context;
if (cx->compartment == ac.destination &&
ac.origin != ac.destination &&
cx->isExceptionPending())
{
Value exc = cx->getPendingException();
if (exc.isObject() && exc.toObject().isError() && exc.toObject().getPrivate()) {
cx->clearPendingException();
ac.leave();
JSObject *copyobj = js_CopyErrorObject(cx, &exc.toObject(), scope);
if (copyobj)
cx->setPendingException(ObjectValue(*copyobj));
}
}
}
/* Cross compartment wrappers. */
CrossCompartmentWrapper::CrossCompartmentWrapper(unsigned flags)
: Wrapper(CROSS_COMPARTMENT | flags)
{
}
CrossCompartmentWrapper::~CrossCompartmentWrapper()
{
}
#define PIERCE(cx, wrapper, mode, pre, op, post) \
JS_BEGIN_MACRO \
AutoCompartment call(cx, wrappedObject(wrapper)); \
if (!call.enter()) \
return false; \
bool ok = (pre) && (op); \
call.leave(); \
return ok && (post); \
JS_END_MACRO
#define NOTHING (true)
bool
CrossCompartmentWrapper::getPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
bool set, PropertyDescriptor *desc)
{
PIERCE(cx, wrapper, set ? SET : GET,
call.destination->wrapId(cx, &id),
Wrapper::getPropertyDescriptor(cx, wrapper, id, set, desc),
call.origin->wrap(cx, desc));
}
bool
CrossCompartmentWrapper::getOwnPropertyDescriptor(JSContext *cx, JSObject *wrapper, jsid id,
bool set, PropertyDescriptor *desc)
{
PIERCE(cx, wrapper, set ? SET : GET,
call.destination->wrapId(cx, &id),
Wrapper::getOwnPropertyDescriptor(cx, wrapper, id, set, desc),
call.origin->wrap(cx, desc));
}
bool
CrossCompartmentWrapper::defineProperty(JSContext *cx, JSObject *wrapper, jsid id, PropertyDescriptor *desc)
{
AutoPropertyDescriptorRooter desc2(cx, desc);
PIERCE(cx, wrapper, SET,
call.destination->wrapId(cx, &id) && call.destination->wrap(cx, &desc2),
Wrapper::defineProperty(cx, wrapper, id, &desc2),
NOTHING);
}
bool
CrossCompartmentWrapper::getOwnPropertyNames(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
PIERCE(cx, wrapper, GET,
NOTHING,
Wrapper::getOwnPropertyNames(cx, wrapper, props),
call.origin->wrap(cx, props));
}
bool
CrossCompartmentWrapper::delete_(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
{
PIERCE(cx, wrapper, SET,
call.destination->wrapId(cx, &id),
Wrapper::delete_(cx, wrapper, id, bp),
NOTHING);
}
bool
CrossCompartmentWrapper::enumerate(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
PIERCE(cx, wrapper, GET,
NOTHING,
Wrapper::enumerate(cx, wrapper, props),
call.origin->wrap(cx, props));
}
bool
CrossCompartmentWrapper::has(JSContext *cx, JSObject *wrapper, jsid id, bool *bp)
{
PIERCE(cx, wrapper, GET,
call.destination->wrapId(cx, &id),
Wrapper::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),
Wrapper::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),
Wrapper::get(cx, wrapper, receiver, id, vp),
call.origin->wrap(cx, vp));
}
bool
CrossCompartmentWrapper::set(JSContext *cx, JSObject *wrapper, JSObject *receiver, jsid id,
bool strict, Value *vp)
{
AutoValueRooter tvr(cx, *vp);
PIERCE(cx, wrapper, SET,
call.destination->wrap(cx, &receiver) &&
call.destination->wrapId(cx, &id) &&
call.destination->wrap(cx, tvr.addr()),
Wrapper::set(cx, wrapper, receiver, id, strict, tvr.addr()),
NOTHING);
}
bool
CrossCompartmentWrapper::keys(JSContext *cx, JSObject *wrapper, AutoIdVector &props)
{
PIERCE(cx, wrapper, GET,
NOTHING,
Wrapper::keys(cx, wrapper, props),
call.origin->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. */
RootedVarObject 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;
id = js_CheckForStringIndex(id);
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,
Wrapper::iterate(cx, wrapper, flags, vp),
CanReify(vp) ? Reify(cx, call.origin, vp) : call.origin->wrap(cx, vp));
}
bool
CrossCompartmentWrapper::call(JSContext *cx, JSObject *wrapper, unsigned argc, Value *vp)
{
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 (!Wrapper::call(cx, wrapper, argc, vp))
return false;
call.leave();
return call.origin->wrap(cx, vp);
}
bool
CrossCompartmentWrapper::construct(JSContext *cx, JSObject *wrapper, unsigned argc, Value *argv,
Value *rval)
{
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 (!Wrapper::construct(cx, wrapper, argc, argv, rval))
return false;
call.leave();
return call.origin->wrap(cx, rval);
}
extern JSBool
js_generic_native_method_dispatcher(JSContext *cx, unsigned argc, Value *vp);
bool
CrossCompartmentWrapper::nativeCall(JSContext *cx, JSObject *wrapper, Class *clasp, Native native, CallArgs srcArgs)
{
JS_ASSERT_IF(!srcArgs.calleev().isUndefined(),
srcArgs.callee().toFunction()->native() == native ||
srcArgs.callee().toFunction()->native() == js_generic_native_method_dispatcher);
JS_ASSERT(&srcArgs.thisv().toObject() == wrapper);
JS_ASSERT(!UnwrapObject(wrapper)->isCrossCompartmentWrapper());
JSObject *wrapped = 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 (!Wrapper::nativeCall(cx, wrapper, clasp, native, dstArgs))
return false;
srcArgs.rval() = dstArgs.rval();
dstArgs.pop();
call.leave();
return call.origin->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 Wrapper::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 = Wrapper::obj_toString(cx, wrapper);
if (!str)
return NULL;
call.leave();
if (!call.origin->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 = Wrapper::fun_toString(cx, wrapper, indent);
if (!str)
return NULL;
call.leave();
if (!call.origin->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 (!Wrapper::defaultValue(cx, wrapper, hint, vp))
return false;
call.leave();
return call.origin->wrap(cx, vp);
}
bool
CrossCompartmentWrapper::iteratorNext(JSContext *cx, JSObject *wrapper, Value *vp)
{
PIERCE(cx, wrapper, GET,
NOTHING,
Wrapper::iteratorNext(cx, wrapper, vp),
call.origin->wrap(cx, vp));
}
void
CrossCompartmentWrapper::trace(JSTracer *trc, JSObject *wrapper)
{
MarkCrossCompartmentSlot(trc, &wrapper->getReservedSlotRef(JSSLOT_PROXY_PRIVATE),
"wrappedObject");
}
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, JSObject *wrapper, Class *clasp, Native native,
CallArgs args)
{
/*
* Let this through until compartment-per-global lets us have stronger
* invariants wrt document.domain (bug 714547).
*/
return Base::nativeCall(cx, wrapper, clasp, native, 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<Wrapper>;
template class js::SecurityWrapper<CrossCompartmentWrapper>;
class JS_FRIEND_API(DeadObjectProxy) : public ProxyHandler
{
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;
virtual bool fix(JSContext *cx, JSObject *wrapper, Value *vp) 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, JSObject *proxy, Class *clasp, Native native, CallArgs args);
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()
: ProxyHandler(&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::fix(JSContext *cx, JSObject *wrapper, Value *vp)
{
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, JSObject *wrapper, Class *clasp,
Native native, 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());
}