source: webkit/trunk/JavaScriptCore/runtime/GlobalEvalFunction.h@ 47304

Last change on this file since 47304 was 47022, checked in by [email protected], 16 years ago

Stack overflow crash in JavaScript garbage collector mark pass
https://bugs.webkit.org/show_bug.cgi?id=12216

Reviewed by Gavin Barraclough and Sam Weinig

Make the GC mark phase iterative by using an explicit mark stack.
To do this marking any single object is performed in multiple stages

  • The object is appended to the MarkStack, this sets the marked bit for the object using the new markDirect() function, and then returns
  • When the MarkStack is drain()ed the object is popped off the stack and markChildren(MarkStack&) is called on the object to collect all of its children. drain() then repeats until the stack is empty.

Additionally I renamed a number of methods from 'mark' to 'markAggregate'
in order to make it more clear that marking of those object was not
going to result in an actual recursive mark.

  • Property svn:eol-style set to native
File size: 1.6 KB
Line 
1/*
2 * Copyright (C) 1999-2000 Harri Porten ([email protected])
3 * Copyright (C) 2003, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
4 * Copyright (C) 2007 Cameron Zwarich ([email protected])
5 * Copyright (C) 2007 Maks Orlovich
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24#ifndef GlobalEvalFunction_h
25#define GlobalEvalFunction_h
26
27#include "PrototypeFunction.h"
28
29namespace JSC {
30
31 class JSGlobalObject;
32
33 class GlobalEvalFunction : public PrototypeFunction {
34 public:
35 GlobalEvalFunction(ExecState*, PassRefPtr<Structure>, int len, const Identifier&, NativeFunction, JSGlobalObject* expectedThisObject);
36 JSGlobalObject* cachedGlobalObject() const { return m_cachedGlobalObject; }
37
38 private:
39 virtual void markChildren(MarkStack&);
40
41 JSGlobalObject* m_cachedGlobalObject;
42 };
43
44} // namespace JSC
45
46#endif // GlobalEvalFunction_h
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