gdb/testsuite/gdb.mi/non-stop.c

   1 /* Test program for non-stop debugging.
   2    Copyright 1996-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <pthread.h>
  22
  23 /* Under OSF 2.0 & 3.0 and HPUX 10, the second arg of pthread_create
  24    is prototyped to be just a "pthread_attr_t", while under Solaris it
  25    is a "pthread_attr_t *".  Arg! */
  26
  27 #if defined (__osf__) || defined (__hpux__)
  28 #define PTHREAD_CREATE_ARG2(arg) arg
  29 #define PTHREAD_CREATE_NULL_ARG2 null_attr
  30 static pthread_attr_t null_attr;
  31 #else
  32 #define PTHREAD_CREATE_ARG2(arg) &arg
  33 #define PTHREAD_CREATE_NULL_ARG2 NULL
  34 #endif
  35
  36 int exit_first_thread = 0;
  37
  38 void break_at_me (int id, int i)
  39 {
  40 }
  41
  42 void *
  43 worker (void *arg)
  44 {
  45   int id = *(int *)arg;
  46   int i = 0;
  47
  48   /* When gdb is running, it sets hidden breakpoints in the thread
  49      library.  The signals caused by these hidden breakpoints can
  50      cause system calls such as 'sleep' to return early.  Pay attention
  51      to the return value from 'sleep' to get the full sleep.  */
  52   for (;;++i)
  53     {
  54       int unslept = 1;
  55       while (unslept > 0)
  56         unslept = sleep (unslept);
  57
  58       if (exit_first_thread && id == 0)
  59         return;
  60
  61       break_at_me (id, i);
  62     }
  63 }
  64
  65 pthread_t
  66 create_thread (int id)
  67 {
  68   pthread_t tid;
  69   /* This memory will be leaked, we don't care for a test.  */
  70   int *id2 = malloc (sizeof (int));
  71   *id2 = id;
  72
  73   if (pthread_create (&tid, PTHREAD_CREATE_NULL_ARG2, worker, (void *) id2))
  74     {
  75       perror ("pthread_create 1");
  76       exit (1);
  77     }
  78   return tid;
  79 }
  80
  81 int
  82 main (int argc, char *argv[])
  83 {
  84   pthread_t tid;
  85   create_thread (0);
  86   sleep (1);
  87   tid = create_thread (1);
  88   pthread_join (tid, NULL);
  89
  90   return 0;
  91 }
  92