mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
f0aa73d2b4
--HG-- extra : rebase_source : 0cd1e5a0f2aceb043b56bea8e1649847cad212f0
390 lines
10 KiB
C++
390 lines
10 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 <string.h>
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#include "jsapi.h"
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#include "jscntxt.h"
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#include "jsfriendapi.h"
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#include "jsgc.h"
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#include "jsobj.h"
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#include "jsweakmap.h"
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#include "gc/Marking.h"
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#include "vm/GlobalObject.h"
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#include "jsgcinlines.h"
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#include "jsobjinlines.h"
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using namespace js;
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namespace js {
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bool
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WeakMapBase::markAllIteratively(JSTracer *tracer)
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{
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bool markedAny = false;
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JSRuntime *rt = tracer->runtime;
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for (WeakMapBase *m = rt->gcWeakMapList; m; m = m->next) {
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if (m->markIteratively(tracer))
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markedAny = true;
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}
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return markedAny;
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}
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void
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WeakMapBase::sweepAll(JSTracer *tracer)
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{
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JSRuntime *rt = tracer->runtime;
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for (WeakMapBase *m = rt->gcWeakMapList; m; m = m->next)
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m->sweep(tracer);
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}
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void
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WeakMapBase::traceAllMappings(WeakMapTracer *tracer)
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{
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JSRuntime *rt = tracer->runtime;
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for (WeakMapBase *m = rt->gcWeakMapList; m; m = m->next)
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m->traceMappings(tracer);
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}
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void
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WeakMapBase::resetWeakMapList(JSRuntime *rt)
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{
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JS_ASSERT(WeakMapNotInList != NULL);
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WeakMapBase *m = rt->gcWeakMapList;
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rt->gcWeakMapList = NULL;
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while (m) {
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WeakMapBase *n = m->next;
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m->next = WeakMapNotInList;
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m = n;
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}
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}
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bool
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WeakMapBase::saveWeakMapList(JSRuntime *rt, WeakMapVector &vector)
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{
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WeakMapBase *m = rt->gcWeakMapList;
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while (m) {
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if (!vector.append(m))
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return false;
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m = m->next;
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}
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return true;
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}
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void
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WeakMapBase::restoreWeakMapList(JSRuntime *rt, WeakMapVector &vector)
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{
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JS_ASSERT(!rt->gcWeakMapList);
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for (WeakMapBase **p = vector.begin(); p != vector.end(); p++) {
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WeakMapBase *m = *p;
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JS_ASSERT(m->next == WeakMapNotInList);
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m->next = rt->gcWeakMapList;
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rt->gcWeakMapList = m;
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}
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}
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} /* namespace js */
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typedef WeakMap<EncapsulatedPtrObject, RelocatableValue> ObjectValueMap;
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static ObjectValueMap *
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GetObjectMap(JSObject *obj)
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{
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JS_ASSERT(obj->isWeakMap());
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return (ObjectValueMap *)obj->getPrivate();
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}
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static JSObject *
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GetKeyArg(JSContext *cx, CallArgs &args)
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{
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Value *vp = &args[0];
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if (vp->isPrimitive()) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NOT_NONNULL_OBJECT);
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return NULL;
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}
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JSObject &key = vp->toObject();
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// If the key is from another compartment, and we store the wrapper as the key
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// the wrapper might be GC-ed since it is not strong referenced (Bug 673468).
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// To avoid this we always use the unwrapped object as the key instead of its
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// security wrapper. This also means that if the keys are ever exposed they must
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// be re-wrapped (see: JS_NondeterministicGetWeakMapKeys).
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return JS_UnwrapObject(&key);
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}
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JS_ALWAYS_INLINE bool
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IsWeakMap(const Value &v)
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{
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return v.isObject() && v.toObject().hasClass(&WeakMapClass);
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}
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JS_ALWAYS_INLINE bool
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WeakMap_has_impl(JSContext *cx, CallArgs args)
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{
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JS_ASSERT(IsWeakMap(args.thisv()));
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if (args.length() < 1) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
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"WeakMap.has", "0", "s");
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return false;
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}
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JSObject *key = GetKeyArg(cx, args);
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if (!key)
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return false;
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if (ObjectValueMap *map = GetObjectMap(&args.thisv().toObject())) {
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if (map->has(key)) {
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args.rval().setBoolean(true);
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return true;
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}
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}
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args.rval().setBoolean(false);
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return true;
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}
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JSBool
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WeakMap_has(JSContext *cx, unsigned argc, Value *vp)
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{
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CallArgs args = CallArgsFromVp(argc, vp);
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return CallNonGenericMethod<IsWeakMap, WeakMap_has_impl>(cx, args);
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}
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JS_ALWAYS_INLINE bool
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WeakMap_get_impl(JSContext *cx, CallArgs args)
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{
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JS_ASSERT(IsWeakMap(args.thisv()));
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if (args.length() < 1) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
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"WeakMap.get", "0", "s");
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return false;
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}
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JSObject *key = GetKeyArg(cx, args);
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if (!key)
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return false;
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if (ObjectValueMap *map = GetObjectMap(&args.thisv().toObject())) {
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if (ObjectValueMap::Ptr ptr = map->lookup(key)) {
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args.rval().set(ptr->value);
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return true;
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}
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}
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args.rval().set((args.length() > 1) ? args[1] : UndefinedValue());
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return true;
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}
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JSBool
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WeakMap_get(JSContext *cx, unsigned argc, Value *vp)
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{
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CallArgs args = CallArgsFromVp(argc, vp);
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return CallNonGenericMethod<IsWeakMap, WeakMap_get_impl>(cx, args);
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}
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JS_ALWAYS_INLINE bool
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WeakMap_delete_impl(JSContext *cx, CallArgs args)
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{
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JS_ASSERT(IsWeakMap(args.thisv()));
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if (args.length() < 1) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
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"WeakMap.delete", "0", "s");
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return false;
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}
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JSObject *key = GetKeyArg(cx, args);
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if (!key)
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return false;
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if (ObjectValueMap *map = GetObjectMap(&args.thisv().toObject())) {
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if (ObjectValueMap::Ptr ptr = map->lookup(key)) {
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map->remove(ptr);
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args.rval().setBoolean(true);
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return true;
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}
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}
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args.rval().setBoolean(false);
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return true;
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}
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JSBool
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WeakMap_delete(JSContext *cx, unsigned argc, Value *vp)
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{
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CallArgs args = CallArgsFromVp(argc, vp);
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return CallNonGenericMethod<IsWeakMap, WeakMap_delete_impl>(cx, args);
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}
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JS_ALWAYS_INLINE bool
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WeakMap_set_impl(JSContext *cx, CallArgs args)
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{
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JS_ASSERT(IsWeakMap(args.thisv()));
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if (args.length() < 1) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
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"WeakMap.set", "0", "s");
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return false;
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}
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RootedObject key(cx, GetKeyArg(cx, args));
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if (!key)
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return false;
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Value value = (args.length() > 1) ? args[1] : UndefinedValue();
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Rooted<JSObject*> thisObj(cx, &args.thisv().toObject());
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ObjectValueMap *map = GetObjectMap(thisObj);
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if (!map) {
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map = cx->new_<ObjectValueMap>(cx, thisObj.get());
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if (!map->init()) {
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js_delete(map);
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JS_ReportOutOfMemory(cx);
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return false;
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}
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thisObj->setPrivate(map);
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}
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// Preserve wrapped native keys to prevent wrapper optimization.
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if (key->getClass()->ext.isWrappedNative) {
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MOZ_ASSERT(cx->runtime->preserveWrapperCallback, "wrapped native weak map key needs preserveWrapperCallback");
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if (!cx->runtime->preserveWrapperCallback(cx, key)) {
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JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_WEAKMAP_KEY);
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return false;
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}
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}
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if (!map->put(key, value)) {
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JS_ReportOutOfMemory(cx);
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return false;
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}
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HashTableWriteBarrierPost(cx->compartment, map, key);
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args.rval().setUndefined();
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return true;
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}
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JSBool
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WeakMap_set(JSContext *cx, unsigned argc, Value *vp)
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{
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CallArgs args = CallArgsFromVp(argc, vp);
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return CallNonGenericMethod<IsWeakMap, WeakMap_set_impl>(cx, args);
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}
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JS_FRIEND_API(JSBool)
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JS_NondeterministicGetWeakMapKeys(JSContext *cx, JSObject *obj, JSObject **ret)
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{
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if (!obj || !obj->isWeakMap()) {
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*ret = NULL;
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return true;
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}
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RootedObject arr(cx, NewDenseEmptyArray(cx));
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if (!arr)
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return false;
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ObjectValueMap *map = GetObjectMap(obj);
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if (map) {
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for (ObjectValueMap::Base::Range r = map->all(); !r.empty(); r.popFront()) {
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RootedObject key(cx, r.front().key);
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// Re-wrapping the key (see comment of GetKeyArg)
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if (!JS_WrapObject(cx, key.address()))
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return false;
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if (!js_NewbornArrayPush(cx, arr, ObjectValue(*key)))
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return false;
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}
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}
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*ret = arr;
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return true;
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}
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static void
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WeakMap_mark(JSTracer *trc, RawObject obj)
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{
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if (ObjectValueMap *map = GetObjectMap(obj))
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map->trace(trc);
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}
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static void
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WeakMap_finalize(FreeOp *fop, RawObject obj)
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{
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if (ObjectValueMap *map = GetObjectMap(obj)) {
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map->check();
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#ifdef DEBUG
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map->~ObjectValueMap();
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memset(static_cast<void *>(map), 0xdc, sizeof(*map));
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fop->free_(map);
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#else
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fop->delete_(map);
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#endif
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}
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}
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static JSBool
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WeakMap_construct(JSContext *cx, unsigned argc, Value *vp)
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{
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JSObject *obj = NewBuiltinClassInstance(cx, &WeakMapClass);
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if (!obj)
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return false;
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vp->setObject(*obj);
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return true;
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}
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Class js::WeakMapClass = {
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"WeakMap",
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JSCLASS_HAS_PRIVATE | JSCLASS_IMPLEMENTS_BARRIERS |
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JSCLASS_HAS_CACHED_PROTO(JSProto_WeakMap),
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JS_PropertyStub, /* addProperty */
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JS_PropertyStub, /* delProperty */
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JS_PropertyStub, /* getProperty */
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JS_StrictPropertyStub, /* setProperty */
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JS_EnumerateStub,
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JS_ResolveStub,
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JS_ConvertStub,
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WeakMap_finalize,
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NULL, /* checkAccess */
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NULL, /* call */
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NULL, /* construct */
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NULL, /* xdrObject */
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WeakMap_mark
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};
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static JSFunctionSpec weak_map_methods[] = {
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JS_FN("has", WeakMap_has, 1, 0),
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JS_FN("get", WeakMap_get, 2, 0),
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JS_FN("delete", WeakMap_delete, 1, 0),
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JS_FN("set", WeakMap_set, 2, 0),
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JS_FS_END
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};
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JSObject *
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js_InitWeakMapClass(JSContext *cx, HandleObject obj)
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{
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JS_ASSERT(obj->isNative());
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Rooted<GlobalObject*> global(cx, &obj->asGlobal());
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RootedObject weakMapProto(cx, global->createBlankPrototype(cx, &WeakMapClass));
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if (!weakMapProto)
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return NULL;
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RootedFunction ctor(cx, global->createConstructor(cx, WeakMap_construct,
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cx->names().WeakMap, 0));
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if (!ctor)
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return NULL;
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if (!LinkConstructorAndPrototype(cx, ctor, weakMapProto))
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return NULL;
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if (!DefinePropertiesAndBrand(cx, weakMapProto, NULL, weak_map_methods))
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return NULL;
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if (!DefineConstructorAndPrototype(cx, global, JSProto_WeakMap, ctor, weakMapProto))
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return NULL;
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return weakMapProto;
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}
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