opnsense-src/lib/libthr/thread
Konstantin Belousov 9be6046a47 Some third-party malloc(3) implementations use pthread_setspecific(3)
to handle per-thread information.  Since our pthread_setspecific()
implementation calls calloc(3) to allocate per-thread specific data
storage, things get complicated.

Switch the allocator to use bare mmap(2).  There is some loss of the
allocated page, since e.g. on amd64, PTHREAD_KEYS_MAX * sizeof(struct
pthread_specific_elem) is 3K (it actually spans whole page due to
padding), but I believe it is more acceptable than additional code for
specialized allocator().

The alternatives would either to make the specific data array be part of
the struct thread, or use internal bindings to call the libc malloc,
avoiding interposing.

Also do the style pass over the thr_spec.c, esp. simplify the
conditionals nesting by returning early when an error detected.
Remove trivial comments.

Found by:	yuri@rawbw.com
PR:	200138
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
2015-05-15 08:40:17 +00:00
..
Makefile.inc Merge all the copies of _tcb_ctor and _tcb_dtor. 2015-01-21 16:41:05 +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
thr_barrier.c Fully initialize allocated memory for the new barrier. The 2015-02-06 12:18:38 +00:00
thr_barrierattr.c
thr_cancel.c The SUSv4tc1 requires that pthread_setcancelstate() shall be not a 2013-06-19 04:47:41 +00:00
thr_clean.c _pthread_cleanup_push: fix allocator sizeof operand mismatch 2015-04-22 16:51:21 +00:00
thr_concurrency.c
thr_cond.c Fix typo in a comment. 2014-09-02 18:21:19 +00:00
thr_condattr.c Coalesce one more broken line. 2010-05-24 13:44:39 +00:00
thr_create.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
thr_ctrdtr.c Merge all the copies of _tcb_ctor and _tcb_dtor. 2015-01-21 16:41:05 +00:00
thr_detach.c Convert thread list lock from mutex to rwlock. 2010-09-13 07:03:01 +00:00
thr_equal.c
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 Revert r274772: it is not valid on MIPS 2014-11-25 03:50:31 +00:00
thr_fork.c Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +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
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 Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +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 In _pthread_kill(), if passed pthread is current thread, do not send 2014-02-01 18:13:18 +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
thr_multi_np.c
thr_mutex.c Propagate errors from _thr_umutex_unlock2 through mutex_unlock_common. 2015-02-25 16:18:26 +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 Fix known issues which blow up the process after dlopen("libthr.so") 2015-01-03 18:38:46 +00:00
thr_private.h Fix a typo in comment and explain the reason. 2015-03-09 20:26:42 +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 Right now, the rtld prefork hook locks the rtld bind lock in the read 2014-05-24 10:23:06 +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
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 Fix bug in r276630. Do not allow pthread_sigmask() to block SIGCANCEL. 2015-01-21 16:13:37 +00:00
thr_single_np.c
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 Some third-party malloc(3) implementations use pthread_setspecific(3) 2015-05-15 08:40:17 +00:00
thr_spinlock.c Properly interpose libc spinlocks, was missed in r276630. In 2015-02-14 11:47:40 +00:00
thr_stack.c Add a knob LIBPTHREAD_BIGSTACK_MAIN, which instructs libthr to leave 2014-08-13 05:53:41 +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
thr_symbols.c
thr_syscalls.c The lseek(2), mmap(2), truncate(2), ftruncate(2), pread(2), and 2015-04-18 21:50:13 +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