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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 <sys/resource.h>
16
17#include "libbpf.h"
18#include "bpf_load.h"
19
20struct pair {
21 long long val;
22 __u64 ip;
23};
24
25static __u64 time_get_ns(void)
26{
27 struct timespec ts;
28
29 clock_gettime(CLOCK_MONOTONIC, &ts);
30 return ts.tv_sec * 1000000000ull + ts.tv_nsec;
31}
32
33static void print_old_objects(int fd)
34{
35 long long val = time_get_ns();
36 __u64 key, next_key;
37 struct pair v;
38
39 key = write(1, "\e[1;1H\e[2J", 12);
40
41 key = -1;
42 while (bpf_map_get_next_key(map_fd[0], &key, &next_key) == 0) {
43 bpf_map_lookup_elem(map_fd[0], &next_key, &v);
44 key = next_key;
45 if (val - v.val < 1000000000ll)
46
47 continue;
48 printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n",
49 next_key, (val - v.val) / 1000000000ll, v.ip);
50 }
51}
52
53int main(int ac, char **argv)
54{
55 struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY};
56 char filename[256];
57 int i;
58
59 snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]);
60
61 if (setrlimit(RLIMIT_MEMLOCK, &r)) {
62 perror("setrlimit(RLIMIT_MEMLOCK, RLIM_INFINITY)");
63 return 1;
64 }
65
66 if (load_bpf_file(filename)) {
67 printf("%s", bpf_log_buf);
68 return 1;
69 }
70
71 for (i = 0; ; i++) {
72 print_old_objects(map_fd[1]);
73 sleep(1);
74 }
75
76 return 0;
77}
78