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

   1 /*
   2  * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
   3  *
   4  * SPDX-License-Identifier: LGPL-2.1-only
   5  *
   6  */
   7
   8 #define _LGPL_SOURCE
   9 #include <getopt.h>
  10 #include <assert.h>
  11 #include <arpa/inet.h>
  12 #include <fcntl.h>
  13 #include <stdarg.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <sys/mman.h>
  18 #include <sys/stat.h>
  19 #include <sys/types.h>
  20 #include <unistd.h>
  21 #include <stdbool.h>
  22 #include <signal.h>
  23 #include <poll.h>
  24 #include <errno.h>
  25 #include "utils.h"
  26 #include "signal-helper.h"
  27
  28 #define TRACEPOINT_DEFINE
  29 #include "tp.h"
  30
  31 static struct option long_options[] =
  32 {
  33         /* These options set a flag. */
  34         {"iter", required_argument, 0, 'i'},
  35         {"wait", required_argument, 0, 'w'},
  36         {"sync-after-first-event", required_argument, 0, 'a'},
  37         {"sync-before-last-event", required_argument, 0, 'b'},
  38         {"sync-before-last-event-touch", required_argument, 0, 'c'},
  39         {"sync-before-exit", required_argument, 0, 'd'},
  40         {"sync-before-exit-touch", required_argument, 0, 'e'},
  41         {"emit-end-event", no_argument, 0, 'f'},
  42         {0, 0, 0, 0}
  43 };
  44
  45 int main(int argc, char **argv)
  46 {
  47         unsigned int i, netint;
  48         int option_index;
  49         int option;
  50         long values[] = { 1, 2, 3 };
  51         char text[10] = "test";
  52         char escape[10] = "\\*";
  53         double dbl = 2.0;
  54         float flt = 2222.0;
  55         uint32_t net_values[] = { 1, 2, 3 };
  56         int nr_iter = 100, ret = 0, first_event_file_created = 0;
  57         useconds_t nr_usec = 0;
  58         char *after_first_event_file_path = NULL;
  59         char *before_last_event_file_path = NULL;
  60         /*
  61          * Touch a file to indicate that all events except one were
  62          * generated.
  63          */
  64         char *before_last_event_file_path_touch = NULL;
  65         /* Touch file when we are exiting */
  66         char *before_exit_file_path_touch = NULL;
  67         /* Wait on file before exiting */
  68         char *before_exit_file_path = NULL;
  69         /* Emit an end event */
  70         bool emit_end_event = false;
  71
  72         for (i = 0; i < 3; i++) {
  73                 net_values[i] = htonl(net_values[i]);
  74         }
  75
  76         while ((option = getopt_long(argc, argv, "i:w:a:b:c:d:e:f",
  77                                 long_options, &option_index)) != -1) {
  78                 switch (option) {
  79                 case 'a':
  80                         after_first_event_file_path = strdup(optarg);
  81                         break;
  82                 case 'b':
  83                         before_last_event_file_path = strdup(optarg);
  84                         break;
  85                 case 'c':
  86                         before_last_event_file_path_touch = strdup(optarg);
  87                         break;
  88                 case 'd':
  89                         before_exit_file_path = strdup(optarg);
  90                         break;
  91                 case 'e':
  92                         before_exit_file_path_touch = strdup(optarg);
  93                         break;
  94                 case 'f':
  95                         emit_end_event = true;
  96                         break;
  97                 case 'i':
  98                         nr_iter = atoi(optarg);
  99                         break;
 100                 case 'w':
 101                         nr_usec = atoi(optarg);
 102                         break;
 103                 case '?':
 104                         /* getopt_long already printed an error message. */
 105                 default:
 106                         ret = -1;
 107                         goto end;
 108                 }
 109         }
 110
 111         if (optind != argc) {
 112                 fprintf(stderr, "Error: takes long options only.\n");
 113
 114                 /*
 115                  * Aborting the test program for now because callers typically don't check
 116                  * the test program return value, and the transition from positional
 117                  * arguments to getopt causes hangs when caller scripts are not updated.
 118                  * An abort is easier to diagnose and fix. This is a temporary solution:
 119                  * we should eventually ensure that all scripts test and report the test
 120                  * app return values.
 121                  */
 122                 abort();
 123
 124                 ret = -1;
 125                 goto end;
 126         }
 127
 128
 129         if (set_signal_handler()) {
 130                 ret = -1;
 131                 goto end;
 132         }
 133
 134         for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
 135                 if (nr_iter >= 0 && i == nr_iter - 1) {
 136                         if (before_last_event_file_path_touch) {
 137                                 ret = create_file(before_last_event_file_path_touch);
 138                                 if (ret != 0) {
 139                                         goto end;
 140                                 }
 141                         }
 142
 143                         /*
 144                          * Wait on synchronization before writing last
 145                          * event.
 146                          */
 147                         if (before_last_event_file_path) {
 148                                 ret = wait_on_file(before_last_event_file_path);
 149                                 if (ret != 0) {
 150                                         goto end;
 151                                 }
 152                         }
 153                 }
 154                 netint = htonl(i);
 155                 tracepoint(tp, tptest, i, netint, values, text,
 156                         strlen(text), escape, net_values, dbl, flt);
 157
 158                 /*
 159                  * First loop we create the file if asked to indicate
 160                  * that at least one tracepoint has been hit.
 161                  */
 162                 if (after_first_event_file_path && first_event_file_created == 0) {
 163                         ret = create_file(after_first_event_file_path);
 164
 165                         if (ret != 0) {
 166                                 goto end;
 167                         } else {
 168                                 first_event_file_created = 1;
 169                         }
 170                 }
 171
 172                 if (nr_usec) {
 173                         if (usleep_safe(nr_usec)) {
 174                                 ret = -1;
 175                                 goto end;
 176                         }
 177                 }
 178                 if (should_quit) {
 179                         break;
 180                 }
 181         }
 182
 183         if (emit_end_event) {
 184                 tracepoint(tp, end);
 185         }
 186
 187         if (before_exit_file_path_touch) {
 188                 ret = create_file(before_exit_file_path_touch);
 189                 if (ret != 0) {
 190                         goto end;
 191                 }
 192         }
 193         if (before_exit_file_path) {
 194                 ret = wait_on_file(before_exit_file_path);
 195                 if (ret != 0) {
 196                         goto end;
 197                 }
 198         }
 199 end:
 200         free(after_first_event_file_path);
 201         free(before_last_event_file_path);
 202         free(before_last_event_file_path_touch);
 203         free(before_exit_file_path);
 204         free(before_exit_file_path_touch);
 205         exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
 206 }