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165 lines
5.9 KiB
C++
165 lines
5.9 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sw=4 et tw=78:
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*
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* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is SpiderMonkey global object code.
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*
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* The Initial Developer of the Original Code is
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* the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Jeff Walden <jwalden+code@mit.edu> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef GlobalObject_h___
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#define GlobalObject_h___
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#include "jsfun.h"
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extern JSObject *
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js_InitFunctionAndObjectClasses(JSContext *cx, JSObject *obj);
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namespace js {
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/*
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* Global object slots are reserved as follows:
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*
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* [0, JSProto_LIMIT)
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* Stores the original value of the constructor for the corresponding
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* JSProtoKey.
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* [JSProto_LIMIT, 2 * JSProto_LIMIT)
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* Stores the prototype, if any, for the constructor for the corresponding
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* JSProtoKey offset from JSProto_LIMIT.
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* [2 * JSProto_LIMIT, 3 * JSProto_LIMIT)
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* Stores the current value of the global property named for the JSProtoKey
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* for the corresponding JSProtoKey offset from 2 * JSProto_LIMIT.
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* [3 * JSProto_LIMIT, RESERVED_SLOTS)
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* Various one-off values: ES5 13.2.3's [[ThrowTypeError]], RegExp statics,
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* the Namespace object for E4X's function::, the original eval for this
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* global object (implementing |var eval = otherWindow.eval; eval(...)| as an
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* indirect eval), a bit indicating whether this object has been cleared
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* (see JS_ClearScope), and a cache for whether eval is allowed (per the
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* global's Content Security Policy).
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*
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* The first two ranges are necessary to implement js::FindClassObject,
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* js::FindClassPrototype, and spec language speaking in terms of "the original
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* Array prototype object", or "as if by the expression new Array()" referring
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* to the original Array constructor. The third range stores the (writable and
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* even deletable) Object, Array, &c. properties (although a slot won't be used
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* again if its property is deleted and readded).
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*/
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class GlobalObject : public ::JSObject {
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/*
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* Count of slots to store built-in constructors, prototypes, and initial
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* visible properties for the constructors.
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*/
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static const uintN STANDARD_CLASS_SLOTS = JSProto_LIMIT * 3;
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/* One-off properties stored after slots for built-ins. */
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static const uintN THROWTYPEERROR = STANDARD_CLASS_SLOTS;
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static const uintN REGEXP_STATICS = THROWTYPEERROR + 1;
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static const uintN FUNCTION_NS = REGEXP_STATICS + 1;
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static const uintN EVAL_ALLOWED = FUNCTION_NS + 1;
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static const uintN EVAL = EVAL_ALLOWED + 1;
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static const uintN FLAGS = EVAL + 1;
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/* Total reserved-slot count for global objects. */
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static const uintN RESERVED_SLOTS = FLAGS + 1;
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void staticAsserts() {
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/*
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* The slot count must be in the public API for JSCLASS_GLOBAL_FLAGS,
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* and we aren't going to expose GlobalObject, so just assert that the
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* two values are synchronized.
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*/
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JS_STATIC_ASSERT(JSCLASS_GLOBAL_SLOT_COUNT == RESERVED_SLOTS);
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}
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static const int32 FLAGS_CLEARED = 0x1;
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void setFlags(int32 flags) {
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setSlot(FLAGS, Int32Value(flags));
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}
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public:
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static GlobalObject *create(JSContext *cx, Class *clasp);
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void setThrowTypeError(JSFunction *fun) {
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Value &v = getSlotRef(THROWTYPEERROR);
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// Our bootstrapping code is currently too convoluted to correctly and
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// confidently assert this.
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// JS_ASSERT(v.isUndefined());
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v.setObject(*fun);
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}
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JSObject *getThrowTypeError() const {
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return &getSlot(THROWTYPEERROR).toObject();
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}
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Value getRegExpStatics() const {
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return getSlot(REGEXP_STATICS);
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}
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void clear(JSContext *cx);
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bool isCleared() const {
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return getSlot(FLAGS).toInt32() & FLAGS_CLEARED;
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}
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bool isEvalAllowed(JSContext *cx);
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const Value &getOriginalEval() const {
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return getSlot(EVAL);
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}
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void setOriginalEval(JSObject *evalobj) {
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Value &v = getSlotRef(EVAL);
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// Our bootstrapping code is currently too convoluted to correctly and
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// confidently assert this.
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// JS_ASSERT(v.isUndefined());
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v.setObject(*evalobj);
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}
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bool getFunctionNamespace(JSContext *cx, Value *vp);
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bool initStandardClasses(JSContext *cx);
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};
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} // namespace js
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js::GlobalObject *
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JSObject::asGlobal()
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{
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JS_ASSERT(isGlobal());
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return reinterpret_cast<js::GlobalObject *>(this);
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}
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#endif /* GlobalObject_h___ */
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