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cosmopolitan/libc/proc
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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
..
BUILD.mk Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
clock.c Implement proper time zone support 2024-05-04 23:06:37 -07:00
daemon.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
describefds.c Share file offset across execve() on Windows 2024-08-03 17:48:00 -07:00
describefds.internal.h Share file offset across execve() on Windows 2024-08-03 17:48:00 -07:00
execl.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execle.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execlp.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
execve-nt.greg.c Spoof PID across execve() on Windows 2024-12-14 13:13:08 -08:00
execve-sysv.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
execve.c Spoof PID across execve() on Windows 2024-12-14 13:13:08 -08:00
execve.internal.h Add dontthrow attribute to most libc functions 2024-01-09 01:26:03 -08:00
execvp.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
execvpe.c Delete ASAN 2024-06-22 05:45:49 -07:00
fexecve.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
fork-nt.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
fork-sysv.c Introduce FreeBSD ARM64 support 2023-12-29 20:14:02 -08:00
fork.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
getpriority-nt.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getpriority.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getrusage-nt.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
getrusage-sysv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
getrusage.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
handle.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
kill-nt.c Spoof PID across execve() on Windows 2024-12-14 13:13:08 -08:00
kill.c Spoof PID across execve() on Windows 2024-12-14 13:13:08 -08:00
killpg.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
nice.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
ntspawn.h Support shebang on Windows 2024-05-20 22:11:42 -07:00
posix_spawn.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
posix_spawn.h Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawn.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00
posix_spawn_add_file_action.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addchdir_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addclose.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_adddup2.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addfchdir_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addopen.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawn_file_actions_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getflags.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getpgroup.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getrlimit.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getsigdefault.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getsigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setflags.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_setpgroup.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setrlimit.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setsigdefault.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setsigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnp.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
proc.c Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
proc.internal.h Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
sched_getaffinity.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
sched_setaffinity.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
setpriority-nt.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
setpriority.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
times.c Implement proper time zone support 2024-05-04 23:06:37 -07:00
verynice.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
vfork.S Eliminate cyclic locks in runtime 2024-12-16 22:25:12 -08:00
wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait3.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait4-nt.c Write more tests for signal handling 2024-09-21 05:24:56 -07:00
wait4-sysv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait4.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
waitpid.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00