51e53a6203781c5004aba5242c53746a02ec3638
[lttng-tools.git] / 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 {0, 0, 0, 0}
42 };
43
44 int main(int argc, char **argv)
45 {
46 unsigned int i, netint;
47 int option_index;
48 int option;
49 long values[] = { 1, 2, 3 };
50 char text[10] = "test";
51 double dbl = 2.0;
52 float flt = 2222.0;
53 int nr_iter = 100, ret = 0, first_event_file_created = 0;
54 useconds_t nr_usec = 0;
55 char *after_first_event_file_path = NULL;
56 char *before_last_event_file_path = NULL;
57 /*
58 * Touch a file to indicate that all events except one were
59 * generated.
60 */
61 char *before_last_event_file_path_touch = NULL;
62 /* Touch file when we are exiting */
63 char *before_exit_file_path_touch = NULL;
64 /* Wait on file before exiting */
65 char *before_exit_file_path = NULL;
66
67 while ((option = getopt_long(argc, argv, "i:w:a:b:c:d:",
68 long_options, &option_index)) != -1) {
69 switch (option) {
70 case 'a':
71 after_first_event_file_path = strdup(optarg);
72 break;
73 case 'b':
74 before_last_event_file_path = strdup(optarg);
75 break;
76 case 'c':
77 before_last_event_file_path_touch = strdup(optarg);
78 break;
79 case 'd':
80 before_exit_file_path = strdup(optarg);
81 break;
82 case 'e':
83 before_exit_file_path_touch = strdup(optarg);
84 break;
85 case 'i':
86 nr_iter = atoi(optarg);
87 break;
88 case 'w':
89 nr_usec = atoi(optarg);
90 break;
91 case '?':
92 /* getopt_long already printed an error message. */
93 break;
94 default:
95 ret = -1;
96 goto end;
97 }
98 }
99
100 if (optind != argc) {
101 fprintf(stderr, "Error: takes long options only.\n");
102
103 /*
104 * Aborting the test program for now because callers typically don't check
105 * the test program return value, and the transition from positional
106 * arguments to getopt causes hangs when caller scripts are not updated.
107 * An abort is easier to diagnose and fix. This is a temporary solution:
108 * we should eventually ensure that all scripts test and report the test
109 * app return values.
110 */
111 abort();
112
113 ret = -1;
114 goto end;
115 }
116
117
118 if (set_signal_handler()) {
119 ret = -1;
120 goto end;
121 }
122
123 for (i = 0; nr_iter < 0 || i < nr_iter; i++) {
124 if (nr_iter >= 0 && i == nr_iter - 1) {
125 if (before_last_event_file_path_touch) {
126 ret = create_file(before_last_event_file_path_touch);
127 if (ret != 0) {
128 goto end;
129 }
130 }
131
132 /*
133 * Wait on synchronization before writing last
134 * event.
135 */
136 if (before_last_event_file_path) {
137 ret = wait_on_file(before_last_event_file_path);
138 if (ret != 0) {
139 goto end;
140 }
141 }
142 }
143 netint = htonl(i);
144 tracepoint(tp, tptest, i, netint, values, text,
145 strlen(text), dbl, flt);
146
147 /*
148 * First loop we create the file if asked to indicate
149 * that at least one tracepoint has been hit.
150 */
151 if (after_first_event_file_path && first_event_file_created == 0) {
152 ret = create_file(after_first_event_file_path);
153
154 if (ret != 0) {
155 goto end;
156 } else {
157 first_event_file_created = 1;
158 }
159 }
160
161 if (nr_usec) {
162 if (usleep_safe(nr_usec)) {
163 ret = -1;
164 goto end;
165 }
166 }
167 if (should_quit) {
168 break;
169 }
170 }
171
172 if (before_exit_file_path_touch) {
173 ret = create_file(before_exit_file_path_touch);
174 if (ret != 0) {
175 goto end;
176 }
177 }
178 if (before_exit_file_path) {
179 ret = wait_on_file(before_exit_file_path);
180 if (ret != 0) {
181 goto end;
182 }
183 }
184 end:
185 free(after_first_event_file_path);
186 free(before_last_event_file_path);
187 free(before_last_event_file_path_touch);
188 free(before_exit_file_path);
189 free(before_exit_file_path_touch);
190 exit(!ret ? EXIT_SUCCESS : EXIT_FAILURE);
191 }
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