// 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;}