1#include <stdio.h>
 2#include <unistd.h>
 3#include <linux/bpf.h>
 4#include <string.h>
 5#include <assert.h>
 6#include <sys/resource.h>
 7#include "libbpf.h"
 8#include "bpf_load.h"
 9
10int main(int ac, char **argv)
11{
12	struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
13	long key, next_key, value;
14	char filename[256];
15	struct ksym *sym;
16	int i;
17
18	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
19	setrlimit(RLIMIT_MEMLOCK, &r);
20
21	if (load_kallsyms()) {
22		printf("failed to process /proc/kallsyms\n");
23		return 2;
24	}
25
26	if (load_bpf_file(filename)) {
27		printf("%s", bpf_log_buf);
28		return 1;
29	}
30
31	for (i = 0; i < 5; i++) {
32		key = 0;
33		printf("kprobing funcs:");
34		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
35			bpf_lookup_elem(map_fd[0], &next_key, &value);
36			assert(next_key == value);
37			sym = ksym_search(value);
38			printf(" %s", sym->name);
39			key = next_key;
40		}
41		if (key)
42			printf("\n");
43		key = 0;
44		while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0)
45			bpf_delete_elem(map_fd[0], &next_key);
46		sleep(1);
47	}
48
49	return 0;
50}