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Properly root expando objects.

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This commit is contained in:
Ms2ger 2017-02-07 11:24:12 +01:00
parent bf814aa5ba
commit bd431039b9
2 changed files with 27 additions and 21 deletions
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24
components/script/dom/bindings/codegen/CodegenRust.py
View file

@ -2510,7 +2510,8 @@ def CopyUnforgeablePropertiesToInstance(descriptor):
# reflector, so we can make sure we don't get confused by named getters.
if descriptor.proxy:
copyCode += """\
rooted!(in(cx) let expando = ensure_expando_object(cx, obj.handle()));
rooted!(in(cx) let mut expando = ptr::null_mut());
ensure_expando_object(cx, obj.handle(), expando.handle_mut());
"""
obj = "expando"
else:
@ -4850,7 +4851,8 @@ if RUST_JSID_IS_STRING(id) {
# FIXME(#11868) Should assign to desc.obj, desc.get() is a copy.
return get + """\
rooted!(in(cx) let expando = get_expando_object(proxy));
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
//if (!xpc::WrapperFactory::IsXrayWrapper(proxy) && (expando = GetExpandoObject(proxy))) {
if !expando.is_null() {
if !JS_GetPropertyDescriptorById(cx, expando.handle(), id, desc) {
@ -4981,10 +4983,10 @@ class CGDOMJSProxyHandler_ownPropertyKeys(CGAbstractExternMethod):
body += dedent(
"""
let expando = get_expando_object(proxy);
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
if !expando.is_null() {
rooted!(in(cx) let rooted_expando = expando);
GetPropertyKeys(cx, rooted_expando.handle(), JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, props);
GetPropertyKeys(cx, expando.handle(), JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, props);
}
return true;
@ -5024,10 +5026,10 @@ class CGDOMJSProxyHandler_getOwnEnumerablePropertyKeys(CGAbstractExternMethod):
body += dedent(
"""
let expando = get_expando_object(proxy);
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
if !expando.is_null() {
rooted!(in(cx) let rooted_expando = expando);
GetPropertyKeys(cx, rooted_expando.handle(), JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, props);
GetPropertyKeys(cx, expando.handle(), JSITER_OWNONLY | JSITER_HIDDEN | JSITER_SYMBOLS, props);
}
return true;
@ -5080,7 +5082,8 @@ if RUST_JSID_IS_STRING(id) {
named = ""
return indexed + """\
rooted!(in(cx) let expando = get_expando_object(proxy));
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
if !expando.is_null() {
let ok = JS_HasPropertyById(cx, expando.handle(), id, bp);
if !ok || *bp {
@ -5105,7 +5108,8 @@ class CGDOMJSProxyHandler_get(CGAbstractExternMethod):
def getBody(self):
getFromExpando = """\
rooted!(in(cx) let expando = get_expando_object(proxy));
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
if !expando.is_null() {
let mut hasProp = false;
if !JS_HasPropertyById(cx, expando.handle(), id, &mut hasProp) {

24
components/script/dom/bindings/proxyhandler.rs
View file

@ -33,7 +33,8 @@ pub unsafe extern "C" fn shadow_check_callback(cx: *mut JSContext,
-> DOMProxyShadowsResult {
// TODO: support OverrideBuiltins when #12978 is fixed.
rooted!(in(cx) let expando = get_expando_object(object));
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(object, expando.handle_mut());
if !expando.get().is_null() {
let mut has_own = false;
if !JS_AlreadyHasOwnPropertyById(cx, expando.handle(), id, &mut has_own) {
@ -99,7 +100,8 @@ pub unsafe extern "C" fn define_property(cx: *mut JSContext,
return true;
}
rooted!(in(cx) let expando = ensure_expando_object(cx, proxy));
rooted!(in(cx) let mut expando = ptr::null_mut());
ensure_expando_object(cx, proxy, expando.handle_mut());
JS_DefinePropertyById(cx, expando.handle(), id, desc, result)
}
@ -109,7 +111,8 @@ pub unsafe extern "C" fn delete(cx: *mut JSContext,
id: HandleId,
bp: *mut ObjectOpResult)
-> bool {
rooted!(in(cx) let expando = get_expando_object(proxy));
rooted!(in(cx) let mut expando = ptr::null_mut());
get_expando_object(proxy, expando.handle_mut());
if expando.is_null() {
(*bp).code_ = 0 /* OkCode */;
return true;
@ -156,31 +159,30 @@ pub unsafe extern "C" fn get_prototype_if_ordinary(_: *mut JSContext,
}
/// Get the expando object, or null if there is none.
pub fn get_expando_object(obj: HandleObject) -> *mut JSObject {
pub fn get_expando_object(obj: HandleObject, expando: MutableHandleObject) {
unsafe {
assert!(is_dom_proxy(obj.get()));
let val = GetProxyExtra(obj.get(), JSPROXYSLOT_EXPANDO);
if val.is_undefined() {
expando.set(if val.is_undefined() {
ptr::null_mut()
} else {
val.to_object()
}
});
}
}
/// Get the expando object, or create it if it doesn't exist yet.
/// Fails on JSAPI failure.
pub fn ensure_expando_object(cx: *mut JSContext, obj: HandleObject) -> *mut JSObject {
pub fn ensure_expando_object(cx: *mut JSContext, obj: HandleObject, expando: MutableHandleObject) {
unsafe {
assert!(is_dom_proxy(obj.get()));
let mut expando = get_expando_object(obj);
get_expando_object(obj, expando);
if expando.is_null() {
expando = JS_NewObjectWithGivenProto(cx, ptr::null_mut(), HandleObject::null());
expando.set(JS_NewObjectWithGivenProto(cx, ptr::null_mut(), HandleObject::null()));
assert!(!expando.is_null());
SetProxyExtra(obj.get(), JSPROXYSLOT_EXPANDO, &ObjectValue(expando));
SetProxyExtra(obj.get(), JSPROXYSLOT_EXPANDO, &ObjectValue(expando.get()));
}
expando
}
}