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  * Work-around inet.h missing struct mmsghdr forward declaration, with
  31  * triggers a warning when system files warnings are enabled.
  32  */
  33 struct mmsghdr;
  34 #include <arpa/inet.h>
  35 #include <stdlib.h>
  36 #include <stdbool.h>
  37
  38 #define TRACEPOINT_DEFINE
  39 #include "ust_tests_hello.h"
  40
  41 void inthandler(int sig)
  42 {
  43         printf("in SIGUSR1 handler\n");
  44         tracepoint(ust_tests_hello, tptest_sighandler);
  45 }
  46
  47 int init_int_handler(void)
  48 {
  49         int result;
  50         struct sigaction act;
  51
  52         memset(&act, 0, sizeof(act));
  53         result = sigemptyset(&act.sa_mask);
  54         if (result == -1) {
  55                 perror("sigemptyset");
  56                 return -1;
  57         }
  58
  59         act.sa_handler = inthandler;
  60         act.sa_flags = SA_RESTART;
  61
  62         /* Only defer ourselves. Also, try to restart interrupted
  63          * syscalls to disturb the traced program as little as possible.
  64          */
  65         result = sigaction(SIGUSR1, &act, NULL);
  66         if (result == -1) {
  67                 perror("sigaction");
  68                 return -1;
  69         }
  70
  71         return 0;
  72 }
  73
  74 int main(int argc, char **argv)
  75 {
  76         int i, netint;
  77         long values[] = { 1, 2, 3 };
  78         char text[10] = "test";
  79         double dbl = 2.0;
  80         float flt = 2222.0;
  81         int delay = 0;
  82         bool mybool = 123;      /* should print "1" */
  83
  84         init_int_handler();
  85
  86         if (argc == 2)
  87                 delay = atoi(argv[1]);
  88
  89         fprintf(stderr, "Hello, World!\n");
  90
  91         sleep(delay);
  92
  93         fprintf(stderr, "Tracing... ");
  94         for (i = 0; i < 1000000; i++) {
  95                 netint = htonl(i);
  96                 tracepoint(ust_tests_hello, tptest, i, netint, values,
  97                            text, strlen(text), dbl, flt, mybool);
  98                 //usleep(100000);
  99         }
 100         fprintf(stderr, " done.\n");
 101         return 0;
 102 }