1  /* Test that pthread_kill succeeds for an exited thread.
       2     Copyright (C) 2021-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  /* This test verifies that the default pthread_kill returns 0 (and not
      20     ESRCH) for a thread that has exited on the kernel side.  */
      21  
      22  #include <errno.h>
      23  #include <pthread.h>
      24  #include <shlib-compat.h>
      25  #include <signal.h>
      26  #include <stddef.h>
      27  #include <support/check.h>
      28  #include <support/support.h>
      29  #include <support/xthread.h>
      30  
      31  static void *
      32  noop_thread (void *closure)
      33  {
      34    return NULL;
      35  }
      36  
      37  #if TEST_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34) && PTHREAD_IN_LIBC
      38  extern __typeof (pthread_kill) compat_pthread_kill;
      39  compat_symbol_reference (libpthread, compat_pthread_kill, pthread_kill,
      40                           GLIBC_2_0);
      41  #endif
      42  
      43  static int
      44  do_test (void)
      45  {
      46    pthread_t thr = xpthread_create (NULL, noop_thread, NULL);
      47  
      48    support_wait_for_thread_exit ();
      49  
      50    /* NB: Always uses the default symbol due to separate compilation.  */
      51    xpthread_kill (thr, SIGUSR1);
      52  
      53  #if TEST_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_34) && PTHREAD_IN_LIBC
      54    /* Old binaries need the non-conforming ESRCH error code.  */
      55    TEST_COMPARE (compat_pthread_kill (thr, SIGUSR1), ESRCH);
      56  #endif
      57  
      58    xpthread_join (thr);
      59  
      60    return 0;
      61  }
      62  
      63  #include <support/test-driver.c>