// SPDX-License-Identifier: LGPL-2.1
/*
 * Basic test coverage for critical regions and rseq_current_cpu().
 */

#define _GNU_SOURCE
#include <assert.h>
#include <sched.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>

#include "rseq.h"

void test_cpu_pointer(void)
{
        cpu_set_t affinity, test_affinity;
        int i;

        sched_getaffinity(0, sizeof(affinity), &affinity);
        CPU_ZERO(&test_affinity);
        for (i = 0; i < CPU_SETSIZE; i++) {
                if (CPU_ISSET(i, &affinity)) {
                        int node;

                        CPU_SET(i, &test_affinity);
                        sched_setaffinity(0, sizeof(test_affinity),
                                        &test_affinity);
                        assert(sched_getcpu() == i);
                        assert(rseq_current_cpu() == i);
                        assert(rseq_current_cpu_raw() == i);
                        assert(rseq_cpu_start() == i);
                        node = rseq_fallback_current_node();
                        assert(rseq_current_node_id() == node);
                        CPU_CLR(i, &test_affinity);
                }
        }
        sched_setaffinity(0, sizeof(affinity), &affinity);
}

int main(int argc, char **argv)
{
        if (rseq_register_current_thread()) {
                fprintf(stderr, "Error: rseq_register_current_thread(...) failed(%d): %s\n",
                        errno, strerror(errno));
                goto init_thread_error;
        }
        printf("testing current cpu\n");
        test_cpu_pointer();
        if (rseq_unregister_current_thread()) {
                fprintf(stderr, "Error: rseq_unregister_current_thread(...) failed(%d): %s\n",
                        errno, strerror(errno));
                goto init_thread_error;
        }
        return 0;

init_thread_error:
        return -1;
}