# cd /usr/src/debug/sys-libs/glibc-2.33/glibc-2.33/nptl

# ls -la

total 260
drwxr-x---  2 root root  4096 Jun 28 21:12 .
drwxr-x--- 55 root root  4096 Jun  1 23:19 ..
-rw-r--r--  1 root root  1415 Feb  1 18:15 alloca_cutoff.c
-rw-r--r--  1 root root  3134 Feb  1 18:15 cancellation.c
-rw-r--r--  1 root root 14505 Feb  1 18:15 descr.h
-rw-r--r--  1 root root  4764 Feb  1 18:15 forward.c
-rw-r--r--  1 root root  1004 Feb  1 18:15 libc-cleanup.c
-rw-r--r--  1 root root  1210 Feb  1 18:15 libc_multiple_threads.c
-rw-r--r--  1 root root  2410 Feb  1 18:15 libc_pthread_init.c
-rw-r--r--  1 root root  1721 Feb  1 18:15 lowlevellock.c
-rw-r--r--  1 root root  1219 Feb  1 18:15 old_pthread_cond_destroy.c
-rw-r--r--  1 root root  1624 Feb  1 18:15 old_pthread_cond_init.c
-rw-r--r--  1 root root 30567 Jun 28 20:55 pthreadP.h
-rw-r--r--  1 root root  2396 Feb  1 18:15 pthread_atfork.c
-rw-r--r--  1 root root  2238 Feb  1 18:15 pthread_attr_copy.c
-rw-r--r--  1 root root  1534 Feb  1 18:15 pthread_attr_destroy.c
-rw-r--r--  1 root root  1136 Feb  1 18:15 pthread_attr_extension.c
-rw-r--r--  1 root root  1232 Feb  1 18:15 pthread_attr_getdetachstate.c
-rw-r--r--  1 root root  1266 Feb  1 18:15 pthread_attr_getinheritsched.c
-rw-r--r--  1 root root  1255 Feb  1 18:15 pthread_attr_getschedparam.c
-rw-r--r--  1 root root  1181 Feb  1 18:15 pthread_attr_getschedpolicy.c
-rw-r--r--  1 root root  1236 Feb  1 18:15 pthread_attr_getscope.c
-rw-r--r--  1 root root  1374 Feb  1 18:15 pthread_attr_getsigmask.c
-rw-r--r--  1 root root  2641 Feb  1 18:15 pthread_attr_init.c
-rw-r--r--  1 root root  2611 Feb  1 18:15 pthread_attr_setaffinity.c
-rw-r--r--  1 root root  1509 Feb  1 18:15 pthread_attr_setdetachstate.c
-rw-r--r--  1 root root  1431 Feb  1 18:15 pthread_attr_setinheritsched.c
-rw-r--r--  1 root root  1458 Feb  1 18:15 pthread_attr_setschedparam.c
-rw-r--r--  1 root root  1370 Feb  1 18:15 pthread_attr_setschedpolicy.c
-rw-r--r--  1 root root  1348 Feb  1 18:15 pthread_attr_setscope.c
-rw-r--r--  1 root root  1261 Feb  1 18:15 pthread_attr_setsigmask.c
-rw-r--r--  1 root root  1524 Feb  1 18:15 pthread_attr_setsigmask_internal.c
-rw-r--r--  1 root root 19590 Feb  1 18:15 pthread_cond_common.c
-rw-r--r--  1 root root  2687 Feb  1 18:15 pthread_cond_destroy.c
-rw-r--r--  1 root root  2018 Feb  1 18:15 pthread_cond_init.c
-rw-r--r--  1 root root  1046 Feb  1 18:15 pthread_condattr_destroy.c
-rw-r--r--  1 root root  1342 Feb  1 18:15 pthread_condattr_init.c
-rw-r--r--  1 root root  1011 Feb  1 18:15 pthread_equal.c
-rw-r--r--  1 root root  2188 Feb  1 18:15 pthread_getaffinity.c
-rw-r--r--  1 root root  6315 Feb  1 18:15 pthread_getattr_np.c
-rw-r--r--  1 root root  2267 Feb  1 18:15 pthread_getschedparam.c
-rw-r--r--  1 root root   959 Feb  1 18:15 pthread_self.c
-rw-r--r--  1 root root  2320 Feb  1 18:15 pthread_setschedparam.c
-rw-r--r--  1 root root  1983 Feb  1 18:15 pthread_sigmask.c
-rw-r--r--  1 root root  4240 Feb  1 18:15 register-atfork.c
-rw-r--r--  1 root root  1195 Feb  1 18:15 sigaction.c
-rw-r--r--  1 root root   922 Feb  1 18:15 thrd_current.c
-rw-r--r--  1 root root   924 Feb  1 18:15 thrd_yield.c