tests/hello/hello.c

   1 /*
   2  * Copyright (C) 2009  Pierre-Marc Fournier
   3  * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  *
   5  * This 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; version 2.1 of
   8  * the License.
   9  *
  10  * This 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 this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  18  */
  19
  20 #include <stdio.h>
  21 #include <unistd.h>
  22 #include <sys/mman.h>
  23 #include <stdarg.h>
  24 #include <sys/types.h>
  25 #include <sys/stat.h>
  26 #include <fcntl.h>
  27 #include <signal.h>
  28 #include <string.h>
  29
  30 #include "ust_tests_hello.h"
  31
  32 void inthandler(int sig)
  33 {
  34         printf("in SIGUSR1 handler\n");
  35         tracepoint(ust_tests_hello_tptest_sighandler);
  36 }
  37
  38 int init_int_handler(void)
  39 {
  40         int result;
  41         struct sigaction act;
  42
  43         memset(&act, 0, sizeof(act));
  44         result = sigemptyset(&act.sa_mask);
  45         if (result == -1) {
  46                 perror("sigemptyset");
  47                 return -1;
  48         }
  49
  50         act.sa_handler = inthandler;
  51         act.sa_flags = SA_RESTART;
  52
  53         /* Only defer ourselves. Also, try to restart interrupted
  54          * syscalls to disturb the traced program as little as possible.
  55          */
  56         result = sigaction(SIGUSR1, &act, NULL);
  57         if (result == -1) {
  58                 perror("sigaction");
  59                 return -1;
  60         }
  61
  62         return 0;
  63 }
  64
  65 int main(int argc, char **argv)
  66 {
  67         int i;
  68         long values[] = { 1, 2, 3 };
  69         char text[10] = "test";
  70         double dbl = 2.0;
  71         float flt = 2222.0;
  72
  73         init_int_handler();
  74
  75         printf("Hello, World!\n");
  76
  77         sleep(1);
  78
  79         for (i = 0; i < 50; i++) {
  80                 tracepoint(ust_tests_hello_tptest, i, values,
  81                            text, strlen(text), dbl, flt);
  82                 usleep(100000);
  83         }
  84         return 0;
  85 }