1/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com
 2 *
 3 * This program is free software; you can redistribute it and/or
 4 * modify it under the terms of version 2 of the GNU General Public
 5 * License as published by the Free Software Foundation.
 6 */
 7#include <stdio.h>
 8#include <stdlib.h>
 9#include <signal.h>
10#include <unistd.h>
11#include <stdbool.h>
12#include <string.h>
13#include <time.h>
14#include <linux/bpf.h>
15#include "libbpf.h"
16#include "bpf_load.h"
17
18struct pair {
19	long long val;
20	__u64 ip;
21};
22
23static __u64 time_get_ns(void)
24{
25	struct timespec ts;
26
27	clock_gettime(CLOCK_MONOTONIC, &ts);
28	return ts.tv_sec * 1000000000ull + ts.tv_nsec;
29}
30
31static void print_old_objects(int fd)
32{
33	long long val = time_get_ns();
34	__u64 key, next_key;
35	struct pair v;
36
37	key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */
38
39	key = -1;
40	while (bpf_get_next_key(map_fd[0], &key, &next_key) == 0) {
41		bpf_lookup_elem(map_fd[0], &next_key, &v);
42		key = next_key;
43		if (val - v.val < 1000000000ll)
44			/* object was allocated more then 1 sec ago */
45			continue;
46		printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
47		       next_key, (val - v.val) / 1000000000ll, v.ip);
48	}
49}
50
51int main(int ac, char **argv)
52{
 
 
 
53	char filename[256];
54	int i;
 
 
 
 
 
 
 
55
56	snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
 
 
 
 
57
58	if (load_bpf_file(filename)) {
59		printf("%s", bpf_log_buf);
60		return 1;
 
61	}
62
63	for (i = 0; ; i++) {
64		print_old_objects(map_fd[1]);
 
 
 
 
 
 
 
 
 
 
65		sleep(1);
66	}
67
 
 
 
 
 
68	return 0;
69}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/* Copyright (c) 2015 PLUMgrid, http://plumgrid.com
 
 
 
 
 3 */
 4#include <stdio.h>
 5#include <stdlib.h>
 6#include <signal.h>
 7#include <unistd.h>
 8#include <stdbool.h>
 9#include <string.h>
10#include <time.h>
11
12#include <bpf/bpf.h>
13#include <bpf/libbpf.h>
14
15struct pair {
16	long long val;
17	__u64 ip;
18};
19
20static __u64 time_get_ns(void)
21{
22	struct timespec ts;
23
24	clock_gettime(CLOCK_MONOTONIC, &ts);
25	return ts.tv_sec * 1000000000ull + ts.tv_nsec;
26}
27
28static void print_old_objects(int fd)
29{
30	long long val = time_get_ns();
31	__u64 key, next_key;
32	struct pair v;
33
34	key = write(1, "\e[1;1H\e[2J", 11); /* clear screen */
35
36	key = -1;
37	while (bpf_map_get_next_key(fd, &key, &next_key) == 0) {
38		bpf_map_lookup_elem(fd, &next_key, &v);
39		key = next_key;
40		if (val - v.val < 1000000000ll)
41			/* object was allocated more then 1 sec ago */
42			continue;
43		printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
44		       next_key, (val - v.val) / 1000000000ll, v.ip);
45	}
46}
47
48int main(int ac, char **argv)
49{
50	struct bpf_link *links[2];
51	struct bpf_program *prog;
52	struct bpf_object *obj;
53	char filename[256];
54	int map_fd, j = 0;
55
56	snprintf(filename, sizeof(filename), "%s.bpf.o", argv[0]);
57	obj = bpf_object__open_file(filename, NULL);
58	if (libbpf_get_error(obj)) {
59		fprintf(stderr, "ERROR: opening BPF object file failed\n");
60		return 0;
61	}
62
63	/* load BPF program */
64	if (bpf_object__load(obj)) {
65		fprintf(stderr, "ERROR: loading BPF object file failed\n");
66		goto cleanup;
67	}
68
69	map_fd = bpf_object__find_map_fd_by_name(obj, "my_map");
70	if (map_fd < 0) {
71		fprintf(stderr, "ERROR: finding a map in obj file failed\n");
72		goto cleanup;
73	}
74
75	bpf_object__for_each_program(prog, obj) {
76		links[j] = bpf_program__attach(prog);
77		if (libbpf_get_error(links[j])) {
78			fprintf(stderr, "ERROR: bpf_program__attach failed\n");
79			links[j] = NULL;
80			goto cleanup;
81		}
82		j++;
83	}
84
85	while (1) {
86		print_old_objects(map_fd);
87		sleep(1);
88	}
89
90cleanup:
91	for (j--; j >= 0; j--)
92		bpf_link__destroy(links[j]);
93
94	bpf_object__close(obj);
95	return 0;
96}