| 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 | } |