1  /* Test that sigprocmask does not read from the unused part of jmpbuf.
       2     Copyright (C) 2017-2023 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  #include <stdlib.h>
      20  #include <signal.h>
      21  #include <string.h>
      22  #include <errno.h>
      23  #include <setjmpP.h>
      24  #include <support/next_to_fault.h>
      25  
      26  #define SIZEOF_SIGSET_T sizeof (__jmp_buf_sigset_t)
      27  
      28  static int
      29  do_test (void)
      30  {
      31    sigjmp_buf sj;
      32    struct support_next_to_fault sigset_t_buf
      33      = support_next_to_fault_allocate (SIZEOF_SIGSET_T);
      34    sigset_t *m_p = (sigset_t *) sigset_t_buf.buffer;
      35    sigset_t m;
      36  
      37    sigemptyset (&m);
      38    memcpy (m_p, &m, SIZEOF_SIGSET_T);
      39    sigprocmask (SIG_SETMASK, m_p, NULL);
      40    memcpy (&m, m_p, SIZEOF_SIGSET_T);
      41    if (sigsetjmp (sj, 0) == 0)
      42      {
      43        sigaddset (&m, SIGUSR1);
      44        memcpy (m_p, &m, SIZEOF_SIGSET_T);
      45        sigprocmask (SIG_SETMASK, m_p, NULL);
      46        memcpy (&m, m_p, SIZEOF_SIGSET_T);
      47        siglongjmp (sj, 1);
      48        return EXIT_FAILURE;
      49      }
      50    sigprocmask (SIG_SETMASK, NULL, m_p);
      51    memcpy (&m, m_p, SIZEOF_SIGSET_T);
      52    return sigismember (&m, SIGUSR1) ? EXIT_SUCCESS : EXIT_FAILURE;
      53  }
      54  
      55  #include <support/test-driver.c>