gdb/nat/linux-waitpid.c

   1 /* Wrapper implementation for waitpid for GNU/Linux (LWP layer).
   2
   3    Copyright (C) 2001-2020 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "gdbsupport/common-defs.h"
  21
  22 #include "linux-nat.h"
  23 #include "linux-waitpid.h"
  24 #include "gdbsupport/gdb_wait.h"
  25
  26 /* Convert wait status STATUS to a string.  Used for printing debug
  27    messages only.  */
  28
  29 char *
  30 status_to_str (int status)
  31 {
  32   static char buf[64];
  33
  34   if (WIFSTOPPED (status))
  35     {
  36       if (WSTOPSIG (status) == SYSCALL_SIGTRAP)
  37         snprintf (buf, sizeof (buf), "%s (stopped at syscall)",
  38                   strsignal (SIGTRAP));
  39       else
  40         snprintf (buf, sizeof (buf), "%s (stopped)",
  41                   strsignal (WSTOPSIG (status)));
  42     }
  43   else if (WIFSIGNALED (status))
  44     snprintf (buf, sizeof (buf), "%s (terminated)",
  45               strsignal (WTERMSIG (status)));
  46   else
  47     snprintf (buf, sizeof (buf), "%d (exited)", WEXITSTATUS (status));
  48
  49   return buf;
  50 }
  51
  52 /* See linux-waitpid.h.  */
  53
  54 int
  55 my_waitpid (int pid, int *status, int flags)
  56 {
  57   int ret;
  58
  59   do
  60     {
  61       ret = waitpid (pid, status, flags);
  62     }
  63   while (ret == -1 && errno == EINTR);
  64
  65   return ret;
  66 }