diff options
| -rw-r--r-- | nptl/pthread_create.c | 4 | ||||
| -rw-r--r-- | sysdeps/pthread/Makefile | 1 | ||||
| -rw-r--r-- | sysdeps/pthread/tst-pthread-exit-signal.c | 45 |
3 files changed, 48 insertions, 2 deletions
diff --git a/nptl/pthread_create.c b/nptl/pthread_create.c index d6ea43a754..bad9eeb52f 100644 --- a/nptl/pthread_create.c +++ b/nptl/pthread_create.c @@ -406,8 +406,6 @@ start_thread (void *arg) unwind_buf.priv.data.prev = NULL; unwind_buf.priv.data.cleanup = NULL; - __libc_signal_restore_set (&pd->sigmask); - /* Allow setxid from now onwards. */ if (__glibc_unlikely (atomic_exchange_acq (&pd->setxid_futex, 0) == -2)) futex_wake (&pd->setxid_futex, 1, FUTEX_PRIVATE); @@ -417,6 +415,8 @@ start_thread (void *arg) /* Store the new cleanup handler info. */ THREAD_SETMEM (pd, cleanup_jmp_buf, &unwind_buf); + __libc_signal_restore_set (&pd->sigmask); + LIBC_PROBE (pthread_start, 3, (pthread_t) pd, pd->start_routine, pd->arg); /* Run the code the user provided. */ diff --git a/sysdeps/pthread/Makefile b/sysdeps/pthread/Makefile index df8943f486..c657101696 100644 --- a/sysdeps/pthread/Makefile +++ b/sysdeps/pthread/Makefile @@ -118,6 +118,7 @@ tests += tst-cnd-basic tst-mtx-trylock tst-cnd-broadcast \ tst-unload \ tst-unwind-thread \ tst-pt-vfork1 tst-pt-vfork2 tst-vfork1x tst-vfork2x \ + tst-pthread-exit-signal \ tst-pthread-setuid-loop \ tst-pthread_cancel-exited \ tst-pthread_cancel-select-loop \ diff --git a/sysdeps/pthread/tst-pthread-exit-signal.c b/sysdeps/pthread/tst-pthread-exit-signal.c new file mode 100644 index 0000000000..b4526fe663 --- /dev/null +++ b/sysdeps/pthread/tst-pthread-exit-signal.c @@ -0,0 +1,45 @@ +/* Test that pending signals are not delivered on thread exit (bug 28607). + Copyright (C) 2021 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <https://www.gnu.org/licenses/>. */ + +/* Due to bug 28607, pthread_kill (or pthread_cancel) restored the + signal mask during during thread exit, triggering the delivery of a + blocked pending signal (SIGUSR1 in this test). */ + +#include <support/xthread.h> +#include <support/xsignal.h> + +static void * +threadfunc (void *closure) +{ + sigset_t sigmask; + sigfillset (&sigmask); + xpthread_sigmask (SIG_SETMASK, &sigmask, NULL); + xpthread_kill (pthread_self (), SIGUSR1); + pthread_exit (NULL); + return NULL; +} + +static int +do_test (void) +{ + pthread_t thr = xpthread_create (NULL, threadfunc, NULL); + xpthread_join (thr); + return 0; +} + +#include <support/test-driver.c> |