tests/utils/testapp/gen-ust-events/gen-ust-events.c

   1 /*
   2  * Copyright (C) - 2012 David Goulet <dgoulet@efficios.com>
   3  *
   4  * This library is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU Lesser General Public License as published by the
   6  * Free Software Foundation; version 2.1 of the License.
   7  *
   8  * This library is distributed in the hope that it will be useful, but WITHOUT
   9  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
  11  * for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public License
  14  * along with this library; if not, write to the Free Software Foundation,
  15  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
  16  */
  17
  18 #define _LGPL_SOURCE
  19 #include <getopt.h>
  20 #include <assert.h>
  21 #include <arpa/inet.h>
  22 #include <fcntl.h>
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #include <sys/mman.h>
  28 #include <sys/stat.h>
  29 #include <sys/types.h>
  30 #include <unistd.h>
  31 #include <stdbool.h>
  32 #include <signal.h>
  33 #include <poll.h>
  34 #include <errno.h>
  35 #include "utils.h"
  36 #include "signal-helper.h"
  37
  38 #define TRACEPOINT_DEFINE
  39 #include "tp.h"
  40
  41 static struct option long_options[] =
  42 {
  43         /* These options set a flag. */
  44         {"iter", required_argument, 0, 'i'},
  45         {"wait", required_argument, 0, 'w'},
  46         {"sync-after-first-event", required_argument, 0, 'a'},
  47         {"sync-before-last-event", required_argument, 0, 'b'},
  48         {"sync-before-last-event-touch", required_argument, 0, 'c'},
  49         {0, 0, 0, 0}
  50 };
  51
  52 int main(int argc, char **argv)
  53 {
  54         unsigned int i, netint;
  55         int option_index;
  56         char option_char;
  57         long values[] = { 1, 2, 3 };
  58         char text[10] = "test";
  59         double dbl = 2.0;
  60         float flt = 2222.0;
  61         int nr_iter = 100, ret = 0, first_event_file_created = 0;
  62         useconds_t nr_usec = 0;
  63         char *after_first_event_file_path = NULL;
  64         char *before_last_event_file_path = NULL;
  65         /*
  66          * Touch a file to indicate that all events except one were
  67          * generated.
  68          */
  69         char *before_last_event_file_path_touch = NULL;
  70
  71         while((option_char = getopt_long(argc, argv, "i:w:a:b:c:d:", long_options, &option_index)) != -1) {
  72                 switch (option_char) {
  73                 case 'a':
  74                         after_first_event_file_path = strdup(optarg);
  75                         break;
  76                 case 'b':
  77                         before_last_event_file_path = strdup(optarg);
  78                         break;
  79                 case 'c':
  80                         before_last_event_file_path_touch = strdup(optarg);
  81                         break;
  82                 case 'i':
  83                         nr_iter = atoi(optarg);
  84                         break;
  85                 case 'w':
  86                         nr_usec = atoi(optarg);
  87                         break;
  88                 case '?':
  89                         /* getopt_long already printed an error message. */
  90                         break;
  91                 default:
  92                         ret = -1;
  93                         goto end;
  94                 }
  95         }
  96
  97         if (optind != argc) {
  98                 fprintf(stderr, "Error: takes long options only.");
  99                 ret = -1;
 100                 goto end;
 101         }
 102
 103
 104         if (set_signal_handler()) {
 105                 ret = -1;
 106                 goto end;
 107         }
 108
 109         for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
 110                 if (nr_iter >= 0 && i == nr_iter - 1) {
 111                         /*
 112                          * Wait on synchronization before writing last
 113                          * event.
 114                          */
 115                         if (before_last_event_file_path_touch) {
 116                                 ret = create_file(before_last_event_file_path_touch);
 117                                 if (ret != 0) {
 118                                         goto end;
 119                                 }
 120                         }
 121                         if (before_last_event_file_path) {
 122                                 ret = wait_on_file(before_last_event_file_path);
 123                                 if (ret != 0) {
 124                                         goto end;
 125                                 }
 126                         }
 127                 }
 128                 netint = htonl(i);
 129                 tracepoint(tp, tptest, i, netint, values, text,
 130                         strlen(text), dbl, flt);
 131
 132                 /*
 133                  * First loop we create the file if asked to indicate
 134                  * that at least one tracepoint has been hit.
 135                  */
 136                 if (after_first_event_file_path && first_event_file_created == 0) {
 137                         ret = create_file(after_first_event_file_path);
 138
 139                         if (ret != 0) {
 140                                 goto end;
 141                         } else {
 142                                 first_event_file_created = 1;
 143                         }
 144                 }
 145
 146                 if (nr_usec) {
 147                         if (usleep_safe(nr_usec)) {
 148                                 ret = -1;
 149                                 goto end;
 150                         }
 151                 }
 152                 if (should_quit) {
 153                         break;
 154                 }
 155         }
 156
 157 end:
 158         free(after_first_event_file_path);
 159         free(before_last_event_file_path);
 160         free(before_last_event_file_path_touch);
 161         exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
 162 }