1// SPDX-License-Identifier: GPL-2.0
2#include <test_progs.h>
3#include <stdio.h>
4#include <stdlib.h>
5#include <sys/mman.h>
6#include <pthread.h>
7#include <sys/types.h>
8#include <sys/stat.h>
9#include <fcntl.h>
10#include "test_send_signal_kern.skel.h"
11
12static void sigusr1_handler(int signum)
13{
14}
15
16#define THREAD_COUNT 100
17
18static void *worker(void *p)
19{
20	int i;
21
22	for ( i = 0; i < 1000; i++)
23		usleep(1);
24
25	return NULL;
26}
27
28/* NOTE: cause events loss */
29void serial_test_send_signal_sched_switch(void)
30{
31	struct test_send_signal_kern *skel;
32	pthread_t threads[THREAD_COUNT];
33	u32 duration = 0;
34	int i, err;
35
36	signal(SIGUSR1, sigusr1_handler);
37
38	skel = test_send_signal_kern__open_and_load();
39	if (CHECK(!skel, "skel_open_and_load", "skeleton open_and_load failed\n"))
40		return;
41
42	skel->bss->pid = getpid();
43	skel->bss->sig = SIGUSR1;
44
45	err = test_send_signal_kern__attach(skel);
46	if (CHECK(err, "skel_attach", "skeleton attach failed\n"))
47		goto destroy_skel;
48
49	for (i = 0; i < THREAD_COUNT; i++) {
50		err = pthread_create(threads + i, NULL, worker, NULL);
51		if (CHECK(err, "pthread_create", "Error creating thread, %s\n",
52			  strerror(errno)))
53			goto destroy_skel;
54	}
55
56	for (i = 0; i < THREAD_COUNT; i++)
57		pthread_join(threads[i], NULL);
58
59destroy_skel:
60	test_send_signal_kern__destroy(skel);
61}
62