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c171f20afb
Currently we use dlsym on pthread_cond_wait$UNIX2003 to find a function that indicates that new_sem_from_pool is on the stack. This works on 10.5, but on 10.6 I could not find a single reliable indicator that would work with dlsym. The good news is that dladdr works with any symbol, not just exported ones. To find the address of new_sem_from_pool, we set up a malloc logger and force a call to new_sem_from_pool. From the logger callback we walk the stack trying dladdr on every address. To force a call to new_sem_from_pool, the initialization code has to be the first to use semaphores, so it is now run from NS_LogInit. This works on 10.6 and 10.5 (but we have to look for "pthread_cond_wait$UNIX2003"). In 10.7 the call to malloc is gone, so we don't have to worry about critical addresses on it anymore. --HG-- extra : rebase_source : bba4ac9e3378c88f7037aa884511e473a57121f6
44 lines
1.9 KiB
C
44 lines
1.9 KiB
C
/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
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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 NS_WalkTheStack.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2007
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Mozilla Corporation (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 the GNU General Public License Version 2 or later (the "GPL"), or
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* 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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/**
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* Initialize the critical sections for this platform so that we can
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* abort stack walks when needed.
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*/
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void
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StackWalkInitCriticalAddress(void);
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