cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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send_signal_sched_switch.c (1291B)

      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}