1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3 * Basic test coverage for critical regions and rseq_current_cpu().
4 */
5
6 #define _GNU_SOURCE
7 #include <assert.h>
8 #include <sched.h>
9 #include <signal.h>
10 #include <stdio.h>
11 #include <string.h>
12 #include <sys/time.h>
13
14 #include "rseq.h"
15
16 void test_cpu_pointer(void)
17 {
18 cpu_set_t affinity, test_affinity;
19 int i;
20
21 sched_getaffinity(0, sizeof(affinity), &affinity);
22 CPU_ZERO(&test_affinity);
23 for (i = 0; i < CPU_SETSIZE; i++) {
24 if (CPU_ISSET(i, &affinity)) {
25 int node;
26
27 CPU_SET(i, &test_affinity);
28 sched_setaffinity(0, sizeof(test_affinity),
29 &test_affinity);
30 assert(sched_getcpu() == i);
31 assert(rseq_current_cpu() == i);
32 assert(rseq_current_cpu_raw() == i);
33 assert(rseq_cpu_start() == i);
34 node = rseq_fallback_current_node();
35 assert(rseq_current_node_id() == node);
36 CPU_CLR(i, &test_affinity);
37 }
38 }
39 sched_setaffinity(0, sizeof(affinity), &affinity);
40 }
41
42 int main(int argc, char **argv)
43 {
44 if (rseq_register_current_thread()) {
45 fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
46 errno, strerror(errno));
47 goto init_thread_error;
48 }
49 printf("testing current cpu\n");
50 test_cpu_pointer();
51 if (rseq_unregister_current_thread()) {
52 fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
53 errno, strerror(errno));
54 goto init_thread_error;
55 }
56 return 0;
57
58 init_thread_error:
59 return -1;
60 }
61
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