1 #include <sys/resource.h>
2 #include <unistd.h>
3 #include <stdlib.h>
4 #include <stdio.h>
5 #include <string.h>
6 #include <libproc.h>
7 #include <mach-o/dyld.h>
8 #include <mach-o/dyld_priv.h>
9 
10 /*
11  * Test helper to retrieve the address of the shared cache. The helper
12  * also verifies that the process is correctly marked to have the shared
13  * cache reslid when interrogated through proc_pid_rusage()
14  */
15 int
main(int argc,char ** argv)16 main(int argc, char **argv)
17 {
18 	size_t shared_cache_len = 0;
19 	struct rusage_info_v5 ru = {};
20 
21 	if (argc != 2) {
22 		fprintf(stderr, "Invalid helper invocation");
23 		exit(1);
24 	}
25 
26 	if (proc_pid_rusage(getpid(), RUSAGE_INFO_V5, (rusage_info_t *)&ru) != 0) {
27 		perror("proc_pid_rusage() helper");
28 		exit(1);
29 	}
30 
31 	if (strcmp(argv[1], "check_rusage_flag") == 0) {
32 		if (!(ru.ri_flags & RU_PROC_RUNS_RESLIDE)) {
33 			fprintf(stderr, "Helper rusage flag check failed\n");
34 			exit(1);
35 		}
36 	}
37 
38 	printf("%p\n", _dyld_get_shared_cache_range(&shared_cache_len));
39 	exit(0);
40 }
41