1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Copyright (C) 2023 SUSE LLC Andrea Cervesato <[email protected]>
4 */
5 /*\
6 * [Description]
7 *
8 * This test spawns multiple threads, then check for each one of them if the
9 * parent ID is different AND if the thread ID is different from all the other
10 * spwaned threads.
11 */
12
13 #include "tst_test.h"
14 #include "lapi/syscalls.h"
15 #include "tst_safe_pthread.h"
16
17 #define THREADS_NUM 10
18
19 static volatile pid_t tids[THREADS_NUM];
20
threaded(void * arg)21 static void *threaded(void *arg)
22 {
23 int i = *(int *)arg;
24 pid_t pid, tid;
25
26 pid = tst_syscall(__NR_getpid);
27 tid = tst_syscall(__NR_gettid);
28
29 TST_EXP_EXPR(pid != tid,
30 "parent ID (%d) differs from thread[%d] ID (%d)",
31 pid, i, tid);
32 tids[i] = tid;
33 return NULL;
34 }
35
run(void)36 static void run(void)
37 {
38 pthread_t thread[THREADS_NUM];
39 int args[THREADS_NUM];
40 int error = 0;
41
42 for (int i = 0; i < THREADS_NUM; i++) {
43 args[i] = i;
44 SAFE_PTHREAD_CREATE(&thread[i], NULL, threaded, &args[i]);
45 }
46 for (int i = 0; i < THREADS_NUM; i++)
47 SAFE_PTHREAD_JOIN(thread[i], NULL);
48
49 for (int i = 0; i < THREADS_NUM; i++) {
50 for (int j = i + 1; j < THREADS_NUM; j++) {
51 if (tids[i] == tids[j]) {
52 tst_res(TINFO, "thread[%d] and thread[%d] have the same ID %d", i, j, tids[i]);
53 error = 1;
54 }
55 }
56 }
57
58 if (error)
59 tst_res(TFAIL, "Some threads have the same TID");
60 else
61 tst_res(TPASS, "All threads have a different TID");
62 }
63
64 static struct tst_test test = {
65 .test_all = run,
66 };
67