JSBool
js_FindVariable(JSContext *cx, jsval id, JSObject **objp, JSProperty **propp)
{
JSRuntime *rt;
JSObject *obj;
JSProperty *prop;
rt = cx->runtime;
PR_ASSERT(JS_IS_RUNTIME_LOCKED(rt));
/*
* First look for id's property along the "with" statement and the
* statically-linked scope chains.
*/
if (!js_FindProperty(cx, id, objp, propp))
return JS_FALSE;
if (*propp)
return JS_TRUE;
/*
* Use the top-level scope from the scope chain, which won't end in the
* same scope as cx->globalObject's for cross-context function calls.
*/
obj = *objp;
PR_ASSERT(obj);
/*
* Make a top-level variable.
*/
prop = js_DefineProperty(cx, obj, id, JSVAL_VOID, NULL, NULL,
JSPROP_ENUMERATE);
if (!prop)
return JS_FALSE;
PROPERTY_CACHE_FILL(cx, &rt->propertyCache, obj, id, prop);
*propp = prop;
return JS_TRUE;
}
JS_SetWatchPoint(JSContext *cx, JSObject *obj, jsval id,
JSWatchPointHandler handler, void *closure)
{
JSAtom *atom;
jsid propid;
JSObject *pobj;
JSScopeProperty *sprop;
JSRuntime *rt;
JSWatchPoint *wp;
JSPropertyOp watcher;
if (!OBJ_IS_NATIVE(obj)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_WATCH,
OBJ_GET_CLASS(cx, obj)->name);
return JS_FALSE;
}
if (JSVAL_IS_INT(id)) {
propid = (jsid)id;
atom = NULL;
} else {
atom = js_ValueToStringAtom(cx, id);
if (!atom)
return JS_FALSE;
propid = (jsid)atom;
}
if (!js_LookupProperty(cx, obj, propid, &pobj, (JSProperty **)&sprop))
return JS_FALSE;
rt = cx->runtime;
if (!sprop) {
/* Check for a deleted symbol watchpoint, which holds its property. */
sprop = js_FindWatchPoint(rt, OBJ_SCOPE(obj), propid);
if (!sprop) {
/* Make a new property in obj so we can watch for the first set. */
if (!js_DefineProperty(cx, obj, propid, JSVAL_VOID,
NULL, NULL, JSPROP_ENUMERATE,
(JSProperty **)&sprop)) {
sprop = NULL;
}
}
} else if (pobj != obj) {
/* Clone the prototype property so we can watch the right object. */
jsval value;
JSPropertyOp getter, setter;
uintN attrs;
if (OBJ_IS_NATIVE(pobj)) {
value = SPROP_HAS_VALID_SLOT(sprop, OBJ_SCOPE(pobj))
? LOCKED_OBJ_GET_SLOT(pobj, sprop->slot)
: JSVAL_VOID;
getter = sprop->getter;
setter = sprop->setter;
attrs = sprop->attrs;
} else {
if (!OBJ_GET_PROPERTY(cx, pobj, id, &value)) {
OBJ_DROP_PROPERTY(cx, pobj, (JSProperty *)sprop);
return JS_FALSE;
}
getter = setter = JS_PropertyStub;
attrs = JSPROP_ENUMERATE;
}
OBJ_DROP_PROPERTY(cx, pobj, (JSProperty *)sprop);
if (!js_DefineProperty(cx, obj, propid, value, getter, setter, attrs,
(JSProperty **)&sprop)) {
sprop = NULL;
}
}
if (!sprop)
return JS_FALSE;
wp = FindWatchPoint(rt, OBJ_SCOPE(obj), propid);
if (!wp) {
watcher = js_WrapWatchedSetter(cx, propid, sprop->attrs, sprop->setter);
if (!watcher)
return JS_FALSE;
wp = (JSWatchPoint *) JS_malloc(cx, sizeof *wp);
if (!wp)
return JS_FALSE;
wp->handler = NULL;
wp->closure = NULL;
if (!js_AddRoot(cx, &wp->closure, "wp->closure")) {
JS_free(cx, wp);
return JS_FALSE;
}
JS_APPEND_LINK(&wp->links, &rt->watchPointList);
wp->object = obj;
wp->sprop = sprop;
JS_ASSERT(sprop->setter != js_watch_set);
wp->setter = sprop->setter;
wp->nrefs = 1;
sprop = js_ChangeNativePropertyAttrs(cx, obj, sprop, 0, sprop->attrs,
sprop->getter, watcher);
if (!sprop)
return DropWatchPoint(cx, wp);
}
wp->handler = handler;
wp->closure = closure;
OBJ_DROP_PROPERTY(cx, obj, (JSProperty *)sprop);
return JS_TRUE;
}
