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 <assert.h>
  20 #include <arpa/inet.h>
  21 #include <fcntl.h>
  22 #include <stdarg.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <sys/mman.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <unistd.h>
  30 #include <stdbool.h>
  31 #include <signal.h>
  32 #include <poll.h>
  33 #include <errno.h>
  34 #include "utils.h"
  35 #include "signal-helper.h"
  36
  37 #define TRACEPOINT_DEFINE
  38 #include "tp.h"
  39
  40 int main(int argc, char **argv)
  41 {
  42         unsigned int i, netint;
  43         long values[] = { 1, 2, 3 };
  44         char text[10] = "test";
  45         double dbl = 2.0;
  46         float flt = 2222.0;
  47         int nr_iter = 100, ret = 0, first_event_file_created = 0;
  48         useconds_t nr_usec = 0;
  49         char *after_first_event_file_path = NULL;
  50         char *before_last_event_file_path = NULL;
  51
  52         if (set_signal_handler()) {
  53                 ret = -1;
  54                 goto end;
  55         }
  56
  57         if (argc >= 2) {
  58                 /*
  59                  * If nr_iter is negative, do an infinite tracing loop.
  60                  */
  61                 nr_iter = atoi(argv[1]);
  62         }
  63
  64         if (argc >= 3) {
  65                 /* By default, don't wait unless user specifies. */
  66                 nr_usec = atoi(argv[2]);
  67         }
  68
  69         if (argc >= 4) {
  70                 after_first_event_file_path = argv[3];
  71         }
  72
  73         if (argc >= 5) {
  74                 before_last_event_file_path = argv[4];
  75         }
  76
  77         for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
  78                 if (nr_iter >= 0 && i == nr_iter - 1) {
  79                         /*
  80                          * Wait on synchronization before writing last
  81                          * event.
  82                          */
  83                         if (before_last_event_file_path) {
  84                                 ret = wait_on_file(before_last_event_file_path);
  85                                 if (ret != 0) {
  86                                         goto end;
  87                                 }
  88                         }
  89                 }
  90                 netint = htonl(i);
  91                 tracepoint(tp, tptest, i, netint, values, text,
  92                         strlen(text), dbl, flt);
  93
  94                 /*
  95                  * First loop we create the file if asked to indicate
  96                  * that at least one tracepoint has been hit.
  97                  */
  98                 if (after_first_event_file_path && first_event_file_created == 0) {
  99                         ret = create_file(after_first_event_file_path);
 100
 101                         if (ret != 0) {
 102                                 goto end;
 103                         } else {
 104                                 first_event_file_created = 1;
 105                         }
 106                 }
 107
 108                 if (nr_usec) {
 109                         if (usleep_safe(nr_usec)) {
 110                                 ret = -1;
 111                                 goto end;
 112                         }
 113                 }
 114                 if (should_quit) {
 115                         break;
 116                 }
 117         }
 118
 119 end:
 120         exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
 121 }