gecko-dev/xpcom/base/nsStackWalkPrivate.h

/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
 * Initialize the critical sections for this platform so that we can
 * abort stack walks when needed.
 */
void
StackWalkInitCriticalAddress(void);
Bug 696376 - Change how we find critical ranges so that it works on 10.6 too. r=dbaron. 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 2011-12-03 04:26:04 +04:00			`/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */`
Bug 716478 - update licence to MPL 2. 2012-05-21 15:12:37 +04:00			`/* This Source Code Form is subject to the terms of the Mozilla Public`
			`* License, v. 2.0. If a copy of the MPL was not distributed with this`
			`* file, You can obtain one at http://mozilla.org/MPL/2.0/. */`
Bug 696376 - Change how we find critical ranges so that it works on 10.6 too. r=dbaron. 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 2011-12-03 04:26:04 +04:00
			`/**`
			`* Initialize the critical sections for this platform so that we can`
			`* abort stack walks when needed.`
			`*/`
			`void`
			`StackWalkInitCriticalAddress(void);`