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         {0, 0, 0, 0}
  49 };
  50
  51 int main(int argc, char **argv)
  52 {
  53         unsigned int i, netint;
  54         int option_index;
  55         int option;
  56         long values[] = { 1, 2, 3 };
  57         char text[10] = "test";
  58         double dbl = 2.0;
  59         float flt = 2222.0;
  60         int nr_iter = 100, ret = 0, first_event_file_created = 0;
  61         useconds_t nr_usec = 0;
  62         char *after_first_event_file_path = NULL;
  63         char *before_last_event_file_path = NULL;
  64
  65         while ((option = getopt_long(argc, argv, "i:w:a:b:c:d:",
  66                         long_options, &option_index)) != -1) {
  67                 switch (option) {
  68                 case 'a':
  69                         after_first_event_file_path = strdup(optarg);
  70                         break;
  71                 case 'b':
  72                         before_last_event_file_path = strdup(optarg);
  73                         break;
  74                 case 'i':
  75                         nr_iter = atoi(optarg);
  76                         break;
  77                 case 'w':
  78                         nr_usec = atoi(optarg);
  79                         break;
  80                 case '?':
  81                         /* getopt_long already printed an error message. */
  82                         break;
  83                 default:
  84                         ret = -1;
  85                         goto end;
  86                 }
  87         }
  88
  89         if (optind != argc) {
  90                 fprintf(stderr, "Error: takes long options only.\n");
  91                 ret = -1;
  92                 goto end;
  93         }
  94
  95
  96         if (set_signal_handler()) {
  97                 ret = -1;
  98                 goto end;
  99         }
 100
 101         for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
 102                 if (nr_iter >= 0 && i == nr_iter - 1) {
 103                         /*
 104                          * Wait on synchronization before writing last
 105                          * event.
 106                          */
 107                         if (before_last_event_file_path) {
 108                                 ret = wait_on_file(before_last_event_file_path);
 109                                 if (ret != 0) {
 110                                         goto end;
 111                                 }
 112                         }
 113                 }
 114                 netint = htonl(i);
 115                 tracepoint(tp, tptest, i, netint, values, text,
 116                         strlen(text), dbl, flt);
 117
 118                 /*
 119                  * First loop we create the file if asked to indicate
 120                  * that at least one tracepoint has been hit.
 121                  */
 122                 if (after_first_event_file_path && first_event_file_created == 0) {
 123                         ret = create_file(after_first_event_file_path);
 124
 125                         if (ret != 0) {
 126                                 goto end;
 127                         } else {
 128                                 first_event_file_created = 1;
 129                         }
 130                 }
 131
 132                 if (nr_usec) {
 133                         if (usleep_safe(nr_usec)) {
 134                                 ret = -1;
 135                                 goto end;
 136                         }
 137                 }
 138                 if (should_quit) {
 139                         break;
 140                 }
 141         }
 142
 143 end:
 144         free(after_first_event_file_path);
 145         free(before_last_event_file_path);
 146         exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
 147 }