mirror of
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Backed out changeset 11226b2f6088 (bug 997894) for causing intermittent Jetpack failures
This commit is contained in:
Ed Morley
parent
81c385a469
commit
55f6949537
@ -1,292 +0,0 @@
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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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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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#ifndef vm_PropDesc_h
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#define vm_PropDesc_h
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#include "jsapi.h"
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#include "NamespaceImports.h"
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namespace js {
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class Debugger;
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static inline JSPropertyOp
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CastAsPropertyOp(JSObject *object)
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{
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return JS_DATA_TO_FUNC_PTR(JSPropertyOp, object);
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}
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static inline JSStrictPropertyOp
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CastAsStrictPropertyOp(JSObject *object)
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{
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return JS_DATA_TO_FUNC_PTR(JSStrictPropertyOp, object);
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}
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/*
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* A representation of ECMA-262 ed. 5's internal Property Descriptor data
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* structure.
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*/
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struct PropDesc {
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private:
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/*
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* Original object from which this descriptor derives, passed through for
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* the benefit of proxies.
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*/
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Value pd_;
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Value value_, get_, set_;
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/* Property descriptor boolean fields. */
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uint8_t attrs;
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/* Bits indicating which values are set. */
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bool hasGet_ : 1;
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bool hasSet_ : 1;
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bool hasValue_ : 1;
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bool hasWritable_ : 1;
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bool hasEnumerable_ : 1;
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bool hasConfigurable_ : 1;
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/* Or maybe this represents a property's absence, and it's undefined. */
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bool isUndefined_ : 1;
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explicit PropDesc(const Value &v)
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: pd_(UndefinedValue()),
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value_(v),
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get_(UndefinedValue()), set_(UndefinedValue()),
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attrs(0),
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hasGet_(false), hasSet_(false),
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hasValue_(true), hasWritable_(false), hasEnumerable_(false), hasConfigurable_(false),
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isUndefined_(false)
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{
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}
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public:
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friend class AutoPropDescRooter;
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friend void JS::AutoGCRooter::trace(JSTracer *trc);
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enum Enumerability { Enumerable = true, NonEnumerable = false };
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enum Configurability { Configurable = true, NonConfigurable = false };
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enum Writability { Writable = true, NonWritable = false };
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PropDesc();
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static PropDesc undefined() { return PropDesc(); }
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static PropDesc valueOnly(const Value &v) { return PropDesc(v); }
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PropDesc(const Value &v, Writability writable,
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Enumerability enumerable, Configurability configurable)
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: pd_(UndefinedValue()),
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value_(v),
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get_(UndefinedValue()), set_(UndefinedValue()),
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attrs((writable ? 0 : JSPROP_READONLY) |
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(enumerable ? JSPROP_ENUMERATE : 0) |
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(configurable ? 0 : JSPROP_PERMANENT)),
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hasGet_(false), hasSet_(false),
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hasValue_(true), hasWritable_(true), hasEnumerable_(true), hasConfigurable_(true),
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isUndefined_(false)
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{}
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inline PropDesc(const Value &getter, const Value &setter,
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Enumerability enumerable, Configurability configurable);
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/*
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* 8.10.5 ToPropertyDescriptor(Obj)
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*
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* If checkAccessors is false, skip steps 7.b and 8.b, which throw a
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* TypeError if .get or .set is neither a callable object nor undefined.
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*
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* (DebuggerObject_defineProperty uses this: the .get and .set properties
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* are expected to be Debugger.Object wrappers of functions, which are not
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* themselves callable.)
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*/
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bool initialize(JSContext *cx, const Value &v, bool checkAccessors = true);
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/*
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* If IsGenericDescriptor(desc) or IsDataDescriptor(desc) is true, then if
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* the value of an attribute field of desc, considered as a data
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* descriptor, is absent, set it to its default value. Else if the value of
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* an attribute field of desc, considered as an attribute descriptor, is
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* absent, set it to its default value.
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*/
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void complete();
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/*
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* 8.10.4 FromPropertyDescriptor(Desc)
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*
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* initFromPropertyDescriptor sets pd to undefined and populates all the
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* other fields of this PropDesc from desc.
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*
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* makeObject populates pd based on the other fields of *this, creating a
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* new property descriptor JSObject and defining properties on it.
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*/
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void initFromPropertyDescriptor(Handle<JSPropertyDescriptor> desc);
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bool makeObject(JSContext *cx);
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void setUndefined() { isUndefined_ = true; }
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bool isUndefined() const { return isUndefined_; }
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bool hasGet() const { MOZ_ASSERT(!isUndefined()); return hasGet_; }
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bool hasSet() const { MOZ_ASSERT(!isUndefined()); return hasSet_; }
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bool hasValue() const { MOZ_ASSERT(!isUndefined()); return hasValue_; }
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bool hasWritable() const { MOZ_ASSERT(!isUndefined()); return hasWritable_; }
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bool hasEnumerable() const { MOZ_ASSERT(!isUndefined()); return hasEnumerable_; }
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bool hasConfigurable() const { MOZ_ASSERT(!isUndefined()); return hasConfigurable_; }
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Value pd() const { MOZ_ASSERT(!isUndefined()); return pd_; }
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void clearPd() { pd_ = UndefinedValue(); }
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uint8_t attributes() const { MOZ_ASSERT(!isUndefined()); return attrs; }
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/* 8.10.1 IsAccessorDescriptor(desc) */
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bool isAccessorDescriptor() const {
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return !isUndefined() && (hasGet() || hasSet());
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}
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/* 8.10.2 IsDataDescriptor(desc) */
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bool isDataDescriptor() const {
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return !isUndefined() && (hasValue() || hasWritable());
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}
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/* 8.10.3 IsGenericDescriptor(desc) */
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bool isGenericDescriptor() const {
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return !isUndefined() && !isAccessorDescriptor() && !isDataDescriptor();
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}
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bool configurable() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasConfigurable());
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return (attrs & JSPROP_PERMANENT) == 0;
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}
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bool enumerable() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasEnumerable());
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return (attrs & JSPROP_ENUMERATE) != 0;
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}
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bool writable() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasWritable());
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return (attrs & JSPROP_READONLY) == 0;
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}
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HandleValue value() const {
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MOZ_ASSERT(hasValue());
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return HandleValue::fromMarkedLocation(&value_);
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}
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JSObject * getterObject() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasGet());
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return get_.isUndefined() ? nullptr : &get_.toObject();
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}
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JSObject * setterObject() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasSet());
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return set_.isUndefined() ? nullptr : &set_.toObject();
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}
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HandleValue getterValue() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasGet());
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return HandleValue::fromMarkedLocation(&get_);
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}
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HandleValue setterValue() const {
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MOZ_ASSERT(!isUndefined());
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MOZ_ASSERT(hasSet());
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return HandleValue::fromMarkedLocation(&set_);
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}
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/*
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* Unfortunately the values produced by these methods are used such that
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* we can't assert anything here. :-(
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*/
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JSPropertyOp getter() const {
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return CastAsPropertyOp(get_.isUndefined() ? nullptr : &get_.toObject());
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}
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JSStrictPropertyOp setter() const {
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return CastAsStrictPropertyOp(set_.isUndefined() ? nullptr : &set_.toObject());
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}
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/*
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* Throw a TypeError if a getter/setter is present and is neither callable
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* nor undefined. These methods do exactly the type checks that are skipped
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* by passing false as the checkAccessors parameter of initialize.
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*/
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bool checkGetter(JSContext *cx);
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bool checkSetter(JSContext *cx);
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bool unwrapDebuggerObjectsInto(JSContext *cx, Debugger *dbg, HandleObject obj,
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PropDesc *unwrapped) const;
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bool wrapInto(JSContext *cx, HandleObject obj, const jsid &id, jsid *wrappedId,
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PropDesc *wrappedDesc) const;
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};
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class AutoPropDescRooter : private JS::CustomAutoRooter
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{
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public:
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explicit AutoPropDescRooter(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: CustomAutoRooter(cx)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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PropDesc& getPropDesc() { return propDesc; }
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void initFromPropertyDescriptor(Handle<JSPropertyDescriptor> desc) {
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propDesc.initFromPropertyDescriptor(desc);
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}
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bool makeObject(JSContext *cx) {
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return propDesc.makeObject(cx);
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}
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void setUndefined() { propDesc.setUndefined(); }
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bool isUndefined() const { return propDesc.isUndefined(); }
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bool hasGet() const { return propDesc.hasGet(); }
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bool hasSet() const { return propDesc.hasSet(); }
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bool hasValue() const { return propDesc.hasValue(); }
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bool hasWritable() const { return propDesc.hasWritable(); }
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bool hasEnumerable() const { return propDesc.hasEnumerable(); }
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bool hasConfigurable() const { return propDesc.hasConfigurable(); }
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Value pd() const { return propDesc.pd(); }
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void clearPd() { propDesc.clearPd(); }
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uint8_t attributes() const { return propDesc.attributes(); }
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bool isAccessorDescriptor() const { return propDesc.isAccessorDescriptor(); }
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bool isDataDescriptor() const { return propDesc.isDataDescriptor(); }
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bool isGenericDescriptor() const { return propDesc.isGenericDescriptor(); }
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bool configurable() const { return propDesc.configurable(); }
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bool enumerable() const { return propDesc.enumerable(); }
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bool writable() const { return propDesc.writable(); }
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HandleValue value() const { return propDesc.value(); }
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JSObject *getterObject() const { return propDesc.getterObject(); }
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JSObject *setterObject() const { return propDesc.setterObject(); }
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HandleValue getterValue() const { return propDesc.getterValue(); }
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HandleValue setterValue() const { return propDesc.setterValue(); }
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JSPropertyOp getter() const { return propDesc.getter(); }
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JSStrictPropertyOp setter() const { return propDesc.setter(); }
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private:
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virtual void trace(JSTracer *trc);
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PropDesc propDesc;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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} /* namespace js */
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#endif /* vm_PropDesc_h */
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@ -27,7 +27,6 @@
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#include "gc/Rooting.h"
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#include "js/HashTable.h"
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#include "js/RootingAPI.h"
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#include "vm/PropDesc.h"
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#ifdef _MSC_VER
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#pragma warning(push)
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@ -119,6 +118,279 @@ typedef JSPropertyDescriptor PropertyDescriptor;
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static const uint32_t SHAPE_INVALID_SLOT = JS_BIT(24) - 1;
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static const uint32_t SHAPE_MAXIMUM_SLOT = JS_BIT(24) - 2;
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static inline PropertyOp
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CastAsPropertyOp(JSObject *object)
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{
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return JS_DATA_TO_FUNC_PTR(PropertyOp, object);
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}
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static inline StrictPropertyOp
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CastAsStrictPropertyOp(JSObject *object)
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{
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return JS_DATA_TO_FUNC_PTR(StrictPropertyOp, object);
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}
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/*
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* A representation of ECMA-262 ed. 5's internal Property Descriptor data
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* structure.
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*/
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struct PropDesc {
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private:
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/*
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* Original object from which this descriptor derives, passed through for
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* the benefit of proxies. FIXME: Remove this when direct proxies happen.
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*/
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Value pd_;
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Value value_, get_, set_;
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/* Property descriptor boolean fields. */
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uint8_t attrs;
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/* Bits indicating which values are set. */
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bool hasGet_ : 1;
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bool hasSet_ : 1;
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bool hasValue_ : 1;
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bool hasWritable_ : 1;
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bool hasEnumerable_ : 1;
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bool hasConfigurable_ : 1;
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/* Or maybe this represents a property's absence, and it's undefined. */
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bool isUndefined_ : 1;
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explicit PropDesc(const Value &v)
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: pd_(UndefinedValue()),
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value_(v),
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get_(UndefinedValue()), set_(UndefinedValue()),
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attrs(0),
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hasGet_(false), hasSet_(false),
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hasValue_(true), hasWritable_(false), hasEnumerable_(false), hasConfigurable_(false),
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isUndefined_(false)
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{
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}
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public:
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friend class AutoPropDescRooter;
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friend void JS::AutoGCRooter::trace(JSTracer *trc);
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enum Enumerability { Enumerable = true, NonEnumerable = false };
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enum Configurability { Configurable = true, NonConfigurable = false };
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enum Writability { Writable = true, NonWritable = false };
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PropDesc();
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static PropDesc undefined() { return PropDesc(); }
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static PropDesc valueOnly(const Value &v) { return PropDesc(v); }
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PropDesc(const Value &v, Writability writable,
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Enumerability enumerable, Configurability configurable)
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: pd_(UndefinedValue()),
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value_(v),
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get_(UndefinedValue()), set_(UndefinedValue()),
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attrs((writable ? 0 : JSPROP_READONLY) |
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(enumerable ? JSPROP_ENUMERATE : 0) |
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(configurable ? 0 : JSPROP_PERMANENT)),
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hasGet_(false), hasSet_(false),
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hasValue_(true), hasWritable_(true), hasEnumerable_(true), hasConfigurable_(true),
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isUndefined_(false)
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{}
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inline PropDesc(const Value &getter, const Value &setter,
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Enumerability enumerable, Configurability configurable);
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/*
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* 8.10.5 ToPropertyDescriptor(Obj)
|
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*
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* If checkAccessors is false, skip steps 7.b and 8.b, which throw a
|
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* TypeError if .get or .set is neither a callable object nor undefined.
|
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*
|
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* (DebuggerObject_defineProperty uses this: the .get and .set properties
|
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* are expected to be Debugger.Object wrappers of functions, which are not
|
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* themselves callable.)
|
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*/
|
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bool initialize(JSContext *cx, const Value &v, bool checkAccessors = true);
|
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|
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/*
|
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* If IsGenericDescriptor(desc) or IsDataDescriptor(desc) is true, then if
|
||||
* the value of an attribute field of desc, considered as a data
|
||||
* descriptor, is absent, set it to its default value. Else if the value of
|
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* an attribute field of desc, considered as an attribute descriptor, is
|
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* absent, set it to its default value.
|
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*/
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void complete();
|
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|
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/*
|
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* 8.10.4 FromPropertyDescriptor(Desc)
|
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*
|
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* initFromPropertyDescriptor sets pd to undefined and populates all the
|
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* other fields of this PropDesc from desc.
|
||||
*
|
||||
* makeObject populates pd based on the other fields of *this, creating a
|
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* new property descriptor JSObject and defining properties on it.
|
||||
*/
|
||||
void initFromPropertyDescriptor(Handle<PropertyDescriptor> desc);
|
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bool makeObject(JSContext *cx);
|
||||
|
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void setUndefined() { isUndefined_ = true; }
|
||||
|
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bool isUndefined() const { return isUndefined_; }
|
||||
|
||||
bool hasGet() const { MOZ_ASSERT(!isUndefined()); return hasGet_; }
|
||||
bool hasSet() const { MOZ_ASSERT(!isUndefined()); return hasSet_; }
|
||||
bool hasValue() const { MOZ_ASSERT(!isUndefined()); return hasValue_; }
|
||||
bool hasWritable() const { MOZ_ASSERT(!isUndefined()); return hasWritable_; }
|
||||
bool hasEnumerable() const { MOZ_ASSERT(!isUndefined()); return hasEnumerable_; }
|
||||
bool hasConfigurable() const { MOZ_ASSERT(!isUndefined()); return hasConfigurable_; }
|
||||
|
||||
Value pd() const { MOZ_ASSERT(!isUndefined()); return pd_; }
|
||||
void clearPd() { pd_ = UndefinedValue(); }
|
||||
|
||||
uint8_t attributes() const { MOZ_ASSERT(!isUndefined()); return attrs; }
|
||||
|
||||
/* 8.10.1 IsAccessorDescriptor(desc) */
|
||||
bool isAccessorDescriptor() const {
|
||||
return !isUndefined() && (hasGet() || hasSet());
|
||||
}
|
||||
|
||||
/* 8.10.2 IsDataDescriptor(desc) */
|
||||
bool isDataDescriptor() const {
|
||||
return !isUndefined() && (hasValue() || hasWritable());
|
||||
}
|
||||
|
||||
/* 8.10.3 IsGenericDescriptor(desc) */
|
||||
bool isGenericDescriptor() const {
|
||||
return !isUndefined() && !isAccessorDescriptor() && !isDataDescriptor();
|
||||
}
|
||||
|
||||
bool configurable() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasConfigurable());
|
||||
return (attrs & JSPROP_PERMANENT) == 0;
|
||||
}
|
||||
|
||||
bool enumerable() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasEnumerable());
|
||||
return (attrs & JSPROP_ENUMERATE) != 0;
|
||||
}
|
||||
|
||||
bool writable() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasWritable());
|
||||
return (attrs & JSPROP_READONLY) == 0;
|
||||
}
|
||||
|
||||
HandleValue value() const {
|
||||
MOZ_ASSERT(hasValue());
|
||||
return HandleValue::fromMarkedLocation(&value_);
|
||||
}
|
||||
|
||||
JSObject * getterObject() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasGet());
|
||||
return get_.isUndefined() ? nullptr : &get_.toObject();
|
||||
}
|
||||
JSObject * setterObject() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasSet());
|
||||
return set_.isUndefined() ? nullptr : &set_.toObject();
|
||||
}
|
||||
|
||||
HandleValue getterValue() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasGet());
|
||||
return HandleValue::fromMarkedLocation(&get_);
|
||||
}
|
||||
HandleValue setterValue() const {
|
||||
MOZ_ASSERT(!isUndefined());
|
||||
MOZ_ASSERT(hasSet());
|
||||
return HandleValue::fromMarkedLocation(&set_);
|
||||
}
|
||||
|
||||
/*
|
||||
* Unfortunately the values produced by these methods are used such that
|
||||
* we can't assert anything here. :-(
|
||||
*/
|
||||
PropertyOp getter() const {
|
||||
return CastAsPropertyOp(get_.isUndefined() ? nullptr : &get_.toObject());
|
||||
}
|
||||
StrictPropertyOp setter() const {
|
||||
return CastAsStrictPropertyOp(set_.isUndefined() ? nullptr : &set_.toObject());
|
||||
}
|
||||
|
||||
/*
|
||||
* Throw a TypeError if a getter/setter is present and is neither callable
|
||||
* nor undefined. These methods do exactly the type checks that are skipped
|
||||
* by passing false as the checkAccessors parameter of initialize.
|
||||
*/
|
||||
bool checkGetter(JSContext *cx);
|
||||
bool checkSetter(JSContext *cx);
|
||||
|
||||
bool unwrapDebuggerObjectsInto(JSContext *cx, Debugger *dbg, HandleObject obj,
|
||||
PropDesc *unwrapped) const;
|
||||
|
||||
bool wrapInto(JSContext *cx, HandleObject obj, const jsid &id, jsid *wrappedId,
|
||||
PropDesc *wrappedDesc) const;
|
||||
};
|
||||
|
||||
class AutoPropDescRooter : private JS::CustomAutoRooter
|
||||
{
|
||||
public:
|
||||
explicit AutoPropDescRooter(JSContext *cx
|
||||
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
||||
: CustomAutoRooter(cx)
|
||||
{
|
||||
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
||||
}
|
||||
|
||||
PropDesc& getPropDesc() { return propDesc; }
|
||||
|
||||
void initFromPropertyDescriptor(Handle<PropertyDescriptor> desc) {
|
||||
propDesc.initFromPropertyDescriptor(desc);
|
||||
}
|
||||
|
||||
bool makeObject(JSContext *cx) {
|
||||
return propDesc.makeObject(cx);
|
||||
}
|
||||
|
||||
void setUndefined() { propDesc.setUndefined(); }
|
||||
bool isUndefined() const { return propDesc.isUndefined(); }
|
||||
|
||||
bool hasGet() const { return propDesc.hasGet(); }
|
||||
bool hasSet() const { return propDesc.hasSet(); }
|
||||
bool hasValue() const { return propDesc.hasValue(); }
|
||||
bool hasWritable() const { return propDesc.hasWritable(); }
|
||||
bool hasEnumerable() const { return propDesc.hasEnumerable(); }
|
||||
bool hasConfigurable() const { return propDesc.hasConfigurable(); }
|
||||
|
||||
Value pd() const { return propDesc.pd(); }
|
||||
void clearPd() { propDesc.clearPd(); }
|
||||
|
||||
uint8_t attributes() const { return propDesc.attributes(); }
|
||||
|
||||
bool isAccessorDescriptor() const { return propDesc.isAccessorDescriptor(); }
|
||||
bool isDataDescriptor() const { return propDesc.isDataDescriptor(); }
|
||||
bool isGenericDescriptor() const { return propDesc.isGenericDescriptor(); }
|
||||
bool configurable() const { return propDesc.configurable(); }
|
||||
bool enumerable() const { return propDesc.enumerable(); }
|
||||
bool writable() const { return propDesc.writable(); }
|
||||
|
||||
HandleValue value() const { return propDesc.value(); }
|
||||
JSObject *getterObject() const { return propDesc.getterObject(); }
|
||||
JSObject *setterObject() const { return propDesc.setterObject(); }
|
||||
HandleValue getterValue() const { return propDesc.getterValue(); }
|
||||
HandleValue setterValue() const { return propDesc.setterValue(); }
|
||||
|
||||
PropertyOp getter() const { return propDesc.getter(); }
|
||||
StrictPropertyOp setter() const { return propDesc.setter(); }
|
||||
|
||||
private:
|
||||
virtual void trace(JSTracer *trc);
|
||||
|
||||
PropDesc propDesc;
|
||||
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
||||
};
|
||||
|
||||
/*
|
||||
* Shapes use multiplicative hashing, but specialized to
|
||||
* minimize footprint.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user