Konstantin Belousov 0a9655a082 If check_deferred_signal() execution needs binding of PLT symbol, ... unlocking the rtld bind lock results in the processing of ast and recursing into the check_deferred_signal(). Nested execution of check_deferred_signal() delivers the signal to user code and clears si_signo. On return, top-level check_deferred_signal() frame continues delivering the same signal one more time, but now with zero si_signo. Fix this by adding a flag to indicate that deferred delivery is running, so check_deferred_signal() should avoid doing anything. Since user signal handler is allowed to modify the passed machine context to make return from the signal handler to cause arbitrary jump, or do longjmp(). For this case, also clear the flag in thr_sighandler(), since kernel signal delivery means that nested delivery code should not run right now. Reported by: Vitaly Magerya <vmagerya@gmail.com> Reviewed by: davidxu, jilles Tested by: pho Sponsored by: The FreeBSD Foundation MFC after: 1 week		2013-11-23 15:48:17 +00:00
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Makefile.inc	Introduce a non-portable function pthread_getthreadid_np(3) to retrieve	2011-02-07 21:26:46 +00:00
thr_affinity.c	Don't compare thread pointers again.	2010-09-13 11:58:42 +00:00
thr_attr.c	Use sysctl kern.sched.cpusetsize to retrieve size of kernel cpuset.	2010-11-02 02:13:13 +00:00
thr_autoinit.c	Make WARNS2 clean. The fixes mostly included:	2003-05-23 09:48:20 +00:00
thr_barrier.c	When destroying a barrier, waiting all threads exit the barrier,	2012-03-16 04:35:52 +00:00
thr_barrierattr.c	WARNS level 4 cleanup.	2006-04-04 02:57:49 +00:00
thr_cancel.c	The SUSv4tc1 requires that pthread_setcancelstate() shall be not a	2013-06-19 04:47:41 +00:00
thr_clean.c	Only access unwind_disabled when _PTHREAD_FORCED_UNWIND is defined.	2010-09-25 09:43:24 +00:00
thr_concurrency.c	WARNS level 4 cleanup.	2006-04-04 02:57:49 +00:00
thr_cond.c	Do defered mutex wakeup once.	2012-08-12 00:56:56 +00:00
thr_condattr.c	Coalesce one more broken line.	2010-05-24 13:44:39 +00:00
thr_create.c	Implement the __pthread_map_stacks_exec() for libthr.	2011-01-09 12:38:40 +00:00
thr_detach.c	Convert thread list lock from mutex to rwlock.	2010-09-13 07:03:01 +00:00
thr_equal.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_event.c	Allow psaddr_t to be widened by using thr_pread_{int,long,ptr},	2008-09-14 16:07:21 +00:00
thr_exit.c	change code to use unwind.h.	2010-09-30 12:59:56 +00:00
thr_fork.c	Eliminate redundant code, _thr_spinlock_init() has already been called	2012-08-23 05:15:15 +00:00
thr_getcpuclockid.c	Implement syscall clock_getcpuclockid2, so we can get a clock id	2012-08-17 02:26:31 +00:00
thr_getprio.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_getschedparam.c	Don't forget to initialize return value.	2012-07-20 05:47:12 +00:00
thr_getthreadid_np.c	Introduce a non-portable function pthread_getthreadid_np(3) to retrieve	2011-02-07 21:26:46 +00:00
thr_info.c	Simplify code by replacing _thr_ref_add() with _thr_find_thread().	2012-07-20 03:37:19 +00:00
thr_init.c	libthr: Always use the threaded rtld lock implementation.	2013-01-18 23:08:40 +00:00
thr_join.c	Fix typo.	2010-09-19 08:55:36 +00:00
thr_kern.c	libthr: Always use the threaded rtld lock implementation.	2013-01-18 23:08:40 +00:00
thr_kill.c	Convert thread list lock from mutex to rwlock.	2010-09-13 07:03:01 +00:00
thr_list.c	Make code more stable by checking NULL pointers.	2012-02-11 04:12:12 +00:00
thr_main_np.c	WARNS level 4 cleanup.	2006-04-04 02:57:49 +00:00
thr_multi_np.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_mutex.c	MFp4:	2012-08-11 23:17:02 +00:00
thr_mutexattr.c	pthread_mutexattr_destroy() was accidentally broken in last revision,	2008-03-20 11:47:08 +00:00
thr_once.c	r179417 introduced a bug into pthread_once(). Previously pthread_once()	2011-04-20 14:19:34 +00:00
thr_printf.c	Import my recent 1:1 threading working. some features improved includes:	2005-04-02 01:20:00 +00:00
thr_private.h	If check_deferred_signal() execution needs binding of PLT symbol,	2013-11-23 15:48:17 +00:00
thr_pspinlock.c	Reverse the logic of UP and SMP.	2007-10-16 07:36:02 +00:00
thr_resume_np.c	In suspend_common(), don't wait for a thread which is in creation, because	2012-08-27 03:09:39 +00:00
thr_rtld.c	libthr: Remove _thr_rtld_fini(), unused since r245630.	2013-04-12 19:47:32 +00:00
thr_rwlock.c	Follow changes made in revision 232144, pass absolute timeout to kernel,	2012-02-27 13:38:52 +00:00
thr_rwlockattr.c	Revert revision 214007, I realized that MySQL wants to resolve	2010-10-20 02:34:02 +00:00
thr_self.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_sem.c	Use umtx to implement process sharable semaphore, to make this work,	2010-01-05 02:37:59 +00:00
thr_setprio.c	Don't assign same value.	2012-07-20 03:22:17 +00:00
thr_setschedparam.c	Don't assign same value.	2012-07-20 03:22:17 +00:00
thr_sig.c	If check_deferred_signal() execution needs binding of PLT symbol,	2013-11-23 15:48:17 +00:00
thr_single_np.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_sleepq.c	Create a common function lookup() to search a chan, this eliminates	2012-05-10 09:30:37 +00:00
thr_spec.c	Return one-based key so that user can check if the key is ever allocated	2013-05-16 03:01:04 +00:00
thr_spinlock.c	Avoid various shadowed variables. libthr is now almost WARNS=4 clean except	2008-04-23 21:06:51 +00:00
thr_stack.c	For the process that already loaded libthr but still not initialized	2011-01-10 16:10:25 +00:00
thr_suspend_np.c	In suspend_common(), don't wait for a thread which is in creation, because	2012-08-27 03:09:39 +00:00
thr_switch_np.c	WARNS level 4 cleanup.	2006-04-04 02:57:49 +00:00
thr_symbols.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00
thr_syscalls.c	Add accept4() system call.	2013-05-01 20:10:21 +00:00
thr_umtx.c	Use clockid parameter instead of hard-coded CLOCK_REALTIME.	2012-03-19 00:07:10 +00:00
thr_umtx.h	libthr: Fix a parameter name in an internal header file.	2013-04-27 14:21:36 +00:00
thr_yield.c	Remove 3rd clause, renumber, ok per email	2007-01-12 07:26:21 +00:00