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cosmopolitan/libc/thread
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Justine Tunney af7bd80430
Eliminate cyclic locks in runtime 
This change introduces a new deadlock detector for Cosmo's POSIX threads
implementation. Error check mutexes will now track a DAG of nested locks
and report EDEADLK when a deadlock is theoretically possible. These will
occur rarely, but it's important for production hardening your code. You
don't even need to change your mutexes to use the POSIX error check mode
because `cosmocc -mdbg` will enable error checking on mutexes by default
globally. When cycles are found, an error message showing your demangled
symbols describing the strongly connected component are printed and then
the SIGTRAP is raised, which means you'll also get a backtrace if you're
using ShowCrashReports() too. This new error checker is so low-level and
so pure that it's able to verify the relationships of every libc runtime
lock, including those locks upon which the mutex implementation depends.
2024-12-16 22:25:12 -08:00
..
alarm.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
BUILD.mk Make malloc() go 200x faster 2024-06-05 02:02:14 -07:00
freebsd.internal.h Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
getitimer.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getstackbottom.c Rewrite memory manager 2024-06-22 05:45:11 -07:00
itimer.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
itimer.internal.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
lock.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
makecontext.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
mktls.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
openbsd.internal.h Rewrite memory manager 2024-06-22 05:45:11 -07:00
posixthread.internal.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pt.internal.h Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_atfork.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_attr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getdetachstate.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getguardsize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getinheritsched.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getscope.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getsigaltstack_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getsigaltstacksize_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_getsigmask_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
pthread_attr_getstack.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_getstacksize.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_init.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_attr_setdetachstate.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setguardsize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setinheritsched.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setscope.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setsigaltstack_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setsigaltstacksize_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setsigmask_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_attr_setstack.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_attr_setstacksize.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_barrier_destroy.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrier_init.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrier_wait.c Introduce cosmo_futex_wait and cosmo_futex_wake 2024-11-22 11:25:15 -08:00
pthread_barrierattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_barrierattr_getpshared.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrierattr_init.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_barrierattr_setpshared.c Make more improvements to threads and mappings 2024-07-24 01:19:54 -07:00
pthread_cancel.c Fix bugs in poll(), select(), ppoll(), and pselect() 2024-09-02 00:29:52 -07:00
pthread_cond_broadcast.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_cond_destroy.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_cond_init.c Rewrite Windows poll() 2024-09-10 20:04:02 -07:00
pthread_cond_signal.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_cond_timedwait.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_cond_wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_condattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_condattr_getclock.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_condattr_getpshared.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_condattr_init.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_condattr_setclock.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_condattr_setpshared.c Introduce pthread_condattr_setclock() 2024-09-02 23:45:42 -07:00
pthread_create.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
pthread_decimate_np.c Improve multithreading 2024-07-21 14:40:45 -07:00
pthread_detach.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
pthread_equal.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
pthread_exit.c Introduce cosmo_futex_wait and cosmo_futex_wake 2024-11-22 11:25:15 -08:00
pthread_getaffinity_np.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_getattr_np.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
pthread_getname_np.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
pthread_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_getspecific.c Make malloc() go 200x faster 2024-06-05 02:02:14 -07:00
pthread_getthreadid_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_getunique_np.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_join.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_key_create.c Make POSIX threads improvements 2024-06-30 15:38:59 -07:00
pthread_key_delete.c Make POSIX threads improvements 2024-06-30 15:38:59 -07:00
pthread_kill.c Write more tests for signal handling 2024-09-21 05:24:56 -07:00
pthread_once.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_reschedule.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlock_destroy.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_init.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_rdlock.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_tryrdlock.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_trywrlock.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_unlock.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlock_wrlock.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlockattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_getpshared.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_rwlockattr_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_rwlockattr_setpshared.c Support process shared pthread_rwlock 2024-12-13 03:00:06 -08:00
pthread_self.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
pthread_setaffinity_np.c Make some improvements of little consequence 2024-07-27 08:20:18 -07:00
pthread_setcanceltype.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
pthread_setname_np.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
pthread_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_setschedparam_freebsd.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_setschedprio.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_sigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
pthread_timedjoin_np.c Introduce cosmo_futex_wait and cosmo_futex_wake 2024-11-22 11:25:15 -08:00
pthread_tryjoin_np.c Work around copy_file_range() bug in eCryptFs 2024-09-29 16:35:38 -07:00
pthread_zombify.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
README.md Use *NSYNC for POSIX threads locking APIs 2022-09-11 11:04:50 -07:00
sem_destroy.c Speed up unnamed POSIX semaphores 2024-09-13 06:25:27 -07:00
sem_getvalue.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
sem_init.c Speed up unnamed POSIX semaphores 2024-09-13 06:25:27 -07:00
sem_open.c Support process shared condition variables 2024-07-22 16:35:29 -07:00
sem_post.c Introduce cosmo_futex_wait and cosmo_futex_wake 2024-11-22 11:25:15 -08:00
sem_timedwait.c Introduce cosmo_futex_wait and cosmo_futex_wake 2024-11-22 11:25:15 -08:00
sem_trywait.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
sem_wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
semaphore.h Remove bad defines from early days of project 2024-07-24 12:11:21 -07:00
setitimer.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
thrd_create.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thrd_detach.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thrd_join.c Add much of C11 threads.h API 2024-04-28 07:04:08 -07:00
thread.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
thread2.h Add dontthrow attribute to most libc functions 2024-01-09 01:26:03 -08:00
threads.h Remove more _Atomic keywords from public headers 2024-07-24 13:56:03 -07:00
tls.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
ualarm.c Delve into clock rabbit hole 2024-09-04 01:32:46 -07:00
xnu.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00

README.md

Cosmpolitan POSIX Threads Library

Cosmopolitan Libc implements threading as it is written in The Open Group Base Specifications Issue 7, 2018 edition IEEE Std 1003.1-2017 (Revision of IEEE Std 1003.1-2008) in addition to GNU extensions.