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         {"sync-before-exit", required_argument, 0, 'd'},
  50         {"sync-before-exit-touch", required_argument, 0, 'e'},
  51         {0, 0, 0, 0}
  52 };
  53
  54 int main(int argc, char **argv)
  55 {
  56         unsigned int i, netint;
  57         int option_index;
  58         int option;
  59         long values[] = { 1, 2, 3 };
  60         char text[10] = "test";
  61         double dbl = 2.0;
  62         float flt = 2222.0;
  63         int nr_iter = 100, ret = 0, first_event_file_created = 0;
  64         useconds_t nr_usec = 0;
  65         char *after_first_event_file_path = NULL;
  66         char *before_last_event_file_path = NULL;
  67         /*
  68          * Touch a file to indicate that all events except one were
  69          * generated.
  70          */
  71         char *before_last_event_file_path_touch = NULL;
  72         /* Touch file when we are exiting */
  73         char *before_exit_file_path_touch = NULL;
  74         /* Wait on file before exiting */
  75         char *before_exit_file_path = NULL;
  76
  77         while ((option = getopt_long(argc, argv, "i:w:a:b:c:d:",
  78                         long_options, &option_index)) != -1) {
  79                 switch (option) {
  80                 case 'a':
  81                         after_first_event_file_path = strdup(optarg);
  82                         break;
  83                 case 'b':
  84                         before_last_event_file_path = strdup(optarg);
  85                         break;
  86                 case 'c':
  87                         before_last_event_file_path_touch = strdup(optarg);
  88                         break;
  89                 case 'd':
  90                         before_exit_file_path = strdup(optarg);
  91                         break;
  92                 case 'e':
  93                         before_exit_file_path_touch = strdup(optarg);
  94                         break;
  95                 case 'i':
  96                         nr_iter = atoi(optarg);
  97                         break;
  98                 case 'w':
  99                         nr_usec = atoi(optarg);
 100                         break;
 101                 case '?':
 102                         /* getopt_long already printed an error message. */
 103                         break;
 104                 default:
 105                         ret = -1;
 106                         goto end;
 107                 }
 108         }
 109
 110         if (optind != argc) {
 111                 fprintf(stderr, "Error: takes long options only.\n");
 112
 113                 /*
 114                  * Aborting the test program for now because callers typically don't check
 115                  * the test program return value, and the transition from positional
 116                  * arguments to getopt causes hangs when caller scripts are not updated.
 117                  * An abort is easier to diagnose and fix. This is a temporary solution:
 118                  * we should eventually ensure that all scripts test and report the test
 119                  * app return values.
 120                  */
 121                 abort();
 122
 123                 ret = -1;
 124                 goto end;
 125         }
 126
 127
 128         if (set_signal_handler()) {
 129                 ret = -1;
 130                 goto end;
 131         }
 132
 133         for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
 134                 if (nr_iter >= 0 && i == nr_iter - 1) {
 135                         if (before_last_event_file_path_touch) {
 136                                 ret = create_file(before_last_event_file_path_touch);
 137                                 if (ret != 0) {
 138                                         goto end;
 139                                 }
 140                         }
 141
 142                         /*
 143                          * Wait on synchronization before writing last
 144                          * event.
 145                          */
 146                         if (before_last_event_file_path) {
 147                                 ret = wait_on_file(before_last_event_file_path);
 148                                 if (ret != 0) {
 149                                         goto end;
 150                                 }
 151                         }
 152                 }
 153                 netint = htonl(i);
 154                 tracepoint(tp, tptest, i, netint, values, text,
 155                         strlen(text), dbl, flt);
 156
 157                 /*
 158                  * First loop we create the file if asked to indicate
 159                  * that at least one tracepoint has been hit.
 160                  */
 161                 if (after_first_event_file_path && first_event_file_created == 0) {
 162                         ret = create_file(after_first_event_file_path);
 163
 164                         if (ret != 0) {
 165                                 goto end;
 166                         } else {
 167                                 first_event_file_created = 1;
 168                         }
 169                 }
 170
 171                 if (nr_usec) {
 172                         if (usleep_safe(nr_usec)) {
 173                                 ret = -1;
 174                                 goto end;
 175                         }
 176                 }
 177                 if (should_quit) {
 178                         break;
 179                 }
 180         }
 181
 182         if (before_exit_file_path_touch) {
 183                 ret = create_file(before_exit_file_path_touch);
 184                 if (ret != 0) {
 185                         goto end;
 186                 }
 187         }
 188         if (before_exit_file_path) {
 189                 ret = wait_on_file(before_exit_file_path);
 190                 if (ret != 0) {
 191                         goto end;
 192                 }
 193         }
 194 end:
 195         free(after_first_event_file_path);
 196         free(before_last_event_file_path);
 197         free(before_last_event_file_path_touch);
 198         free(before_exit_file_path);
 199         free(before_exit_file_path_touch);
 200         exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
 201 }