source: webkit/trunk/JavaScriptCore/kjs/JSStaticScopeObject.cpp@ 35368

Last change on this file since 35368 was 35368, checked in by [email protected], 17 years ago

Bug 19718: Named anonymous functions are slow accessing global variables
<https://bugs.webkit.org/show_bug.cgi?id=19718>

Reviewed by Cameron Zwarich.

To fix this we switch over to an activation-like scope object for
on which we attach the function name property, and add logic to
prevent cross scope assignment to read only properties.

File size: 2.2 KB
Line 
1/*
2 * Copyright (C) 2008 Apple Inc. All Rights Reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27
28#include "JSStaticScopeObject.h"
29
30namespace KJS {
31
32void JSStaticScopeObject::putWithAttributes(ExecState*, const Identifier& propertyName, JSValue* value, unsigned attributes)
33{
34 if (symbolTablePutWithAttributes(propertyName, value, attributes))
35 return;
36
37 ASSERT_NOT_REACHED();
38}
39
40bool JSStaticScopeObject::isDynamicScope() const
41{
42 return false;
43}
44
45JSStaticScopeObject::~JSStaticScopeObject()
46{
47 ASSERT(d);
48 delete static_cast<JSStaticScopeObjectData*>(d);
49}
50
51inline bool JSStaticScopeObject::getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot& slot)
52{
53 return symbolTableGet(propertyName, slot);
54}
55
56inline bool JSStaticScopeObject::getOwnPropertySlot(ExecState*, const Identifier& propertyName, PropertySlot& slot, bool& slotIsWriteable)
57{
58 return symbolTableGet(propertyName, slot, slotIsWriteable);
59}
60
61}
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