Tests: Add "fork" ust regression test
[lttng-tools.git] / tests / regression / ust / fork / fork.c
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1/*
2 * Copyright (C) 2009 Pierre-Marc Fournier
3 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; version 2.1 of
8 * the License.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19
20#include <stdio.h>
21#include <unistd.h>
22#include <sys/types.h>
23#include <stdlib.h>
24
25#define TRACEPOINT_DEFINE
26#define TRACEPOINT_CREATE_PROBES
27#include "ust_tests_fork.h"
28
29int main(int argc, char **argv, char *env[])
30{
31 int result;
32
33 if (argc < 2) {
34 fprintf(stderr, "usage: fork PROG_TO_EXEC\n");
35 exit(1);
36 }
37
38 printf("parent_pid %d\n", getpid());
39 tracepoint(ust_tests_fork, before_fork, getpid());
40
41 result = fork();
42 if (result == -1) {
43 perror("fork");
44 return 1;
45 }
46 if (result == 0) {
47 char *args[] = { "fork2", NULL };
48
49 tracepoint(ust_tests_fork, after_fork_child, getpid());
50
51 result = execve(argv[1], args, env);
52 if (result == -1) {
53 perror("execve");
54 return 1;
55 }
56 } else {
57 printf("child_pid %d\n", result);
58 tracepoint(ust_tests_fork, after_fork_parent, getpid());
59 }
60
61 return 0;
62}
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