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Hi! *(pthread_t *) arg points to a variable (me) on initial thread's stack. If tf returns from pthread_barrier_wait after do_test returns from pthread_barrier_wait and runs all the code until return from routine, *mtp in tf reads garbage. The patch below ensures that the handle is read from initial thread's stack before pthread_barrier_wait, so the routine certainly did not return yet. Alternatively me variable in do_test would need to be static, or it would need to pass pthread_t, not pthread_t *. 2004-08-11 Jakub Jelinek <jakub@redhat.com> * tst-rwlock14.c (tf): Read main thread handle from *arg before pthread_barrier_wait. --- libc/nptl/tst-rwlock14.c.jj 2004-08-11 15:20:06.504152481 +0200 +++ libc/nptl/tst-rwlock14.c 2004-08-11 15:26:34.056471560 +0200 @@ -38,12 +38,12 @@ tf (void *arg) exit (EXIT_FAILURE); } - pthread_barrier_wait (&b); + pthread_t mt = *(pthread_t *) arg; - pthread_t *mtp = (pthread_t *) arg; + pthread_barrier_wait (&b); /* This call will never return. */ - pthread_join (*mtp, NULL); + pthread_join (mt, NULL); return NULL; } Jakub
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