1  /* Copyright (C) 1991-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <stddef.h>
      19  #include <setjmpP.h>
      20  #include <signal.h>
      21  
      22  
      23  /* Set the signal mask to the one specified in ENV, and jump
      24     to the position specified in ENV, causing the setjmp
      25     call there to return VAL, or 1 if VAL is 0.  */
      26  void
      27  __libc_siglongjmp (sigjmp_buf env, int val)
      28  {
      29    /* Perform any cleanups needed by the frames being unwound.  */
      30    _longjmp_unwind (env, val);
      31  
      32    if (env[0].__mask_was_saved)
      33      /* Restore the saved signal mask.  */
      34      (void) __sigprocmask (SIG_SETMASK,
      35  			  (sigset_t *) &env[0].__saved_mask,
      36  			  (sigset_t *) NULL);
      37  
      38    /* Call the machine-dependent function to restore machine state.  */
      39    __longjmp (env[0].__jmpbuf, val ?: 1);
      40  }
      41  
      42  #ifndef __libc_siglongjmp
      43  # ifndef __libc_longjmp
      44  /* __libc_longjmp is a private interface for cancellation implementation
      45     in libpthread.  */
      46  strong_alias (__libc_siglongjmp, __libc_longjmp)
      47  # endif
      48  weak_alias (__libc_siglongjmp, _longjmp)
      49  weak_alias (__libc_siglongjmp, longjmp)
      50  weak_alias (__libc_siglongjmp, siglongjmp)
      51  #endif