Commit | Line | Data |
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25763b3c | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9811e353 | 2 | /* Copyright (c) 2015 PLUMgrid, http://plumgrid.com |
9811e353 AS |
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> | |
55de1703 JDB |
11 | #include <sys/resource.h> |
12 | ||
2bf3e2ef | 13 | #include <bpf/bpf.h> |
63841bc0 | 14 | #include <bpf/libbpf.h> |
9811e353 AS |
15 | |
16 | struct pair { | |
17 | long long val; | |
18 | __u64 ip; | |
19 | }; | |
20 | ||
21 | static __u64 time_get_ns(void) | |
22 | { | |
23 | struct timespec ts; | |
24 | ||
25 | clock_gettime(CLOCK_MONOTONIC, &ts); | |
26 | return ts.tv_sec * 1000000000ull + ts.tv_nsec; | |
27 | } | |
28 | ||
29 | static void print_old_objects(int fd) | |
30 | { | |
31 | long long val = time_get_ns(); | |
32 | __u64 key, next_key; | |
33 | struct pair v; | |
34 | ||
35 | key = write(1, "\e[1;1H\e[2J", 12); /* clear screen */ | |
36 | ||
37 | key = -1; | |
63841bc0 DL |
38 | while (bpf_map_get_next_key(fd, &key, &next_key) == 0) { |
39 | bpf_map_lookup_elem(fd, &next_key, &v); | |
9811e353 AS |
40 | key = next_key; |
41 | if (val - v.val < 1000000000ll) | |
42 | /* object was allocated more then 1 sec ago */ | |
43 | continue; | |
44 | printf("obj 0x%llx is %2lldsec old was allocated at ip %llx\n", | |
45 | next_key, (val - v.val) / 1000000000ll, v.ip); | |
46 | } | |
47 | } | |
48 | ||
49 | int main(int ac, char **argv) | |
50 | { | |
55de1703 | 51 | struct rlimit r = {RLIM_INFINITY, RLIM_INFINITY}; |
63841bc0 DL |
52 | struct bpf_link *links[2]; |
53 | struct bpf_program *prog; | |
54 | struct bpf_object *obj; | |
9811e353 | 55 | char filename[256]; |
63841bc0 | 56 | int map_fd, i, j = 0; |
9811e353 | 57 | |
55de1703 JDB |
58 | if (setrlimit(RLIMIT_MEMLOCK, &r)) { |
59 | perror("setrlimit(RLIMIT_MEMLOCK, RLIM_INFINITY)"); | |
60 | return 1; | |
61 | } | |
62 | ||
63841bc0 DL |
63 | snprintf(filename, sizeof(filename), "%s_kern.o", argv[0]); |
64 | obj = bpf_object__open_file(filename, NULL); | |
65 | if (libbpf_get_error(obj)) { | |
66 | fprintf(stderr, "ERROR: opening BPF object file failed\n"); | |
67 | return 0; | |
68 | } | |
69 | ||
70 | /* load BPF program */ | |
71 | if (bpf_object__load(obj)) { | |
72 | fprintf(stderr, "ERROR: loading BPF object file failed\n"); | |
73 | goto cleanup; | |
74 | } | |
75 | ||
76 | map_fd = bpf_object__find_map_fd_by_name(obj, "my_map"); | |
77 | if (map_fd < 0) { | |
78 | fprintf(stderr, "ERROR: finding a map in obj file failed\n"); | |
79 | goto cleanup; | |
80 | } | |
81 | ||
82 | bpf_object__for_each_program(prog, obj) { | |
83 | links[j] = bpf_program__attach(prog); | |
84 | if (libbpf_get_error(links[j])) { | |
85 | fprintf(stderr, "ERROR: bpf_program__attach failed\n"); | |
86 | links[j] = NULL; | |
87 | goto cleanup; | |
88 | } | |
89 | j++; | |
9811e353 AS |
90 | } |
91 | ||
92 | for (i = 0; ; i++) { | |
63841bc0 | 93 | print_old_objects(map_fd); |
9811e353 AS |
94 | sleep(1); |
95 | } | |
96 | ||
63841bc0 DL |
97 | cleanup: |
98 | for (j--; j >= 0; j--) | |
99 | bpf_link__destroy(links[j]); | |
100 | ||
101 | bpf_object__close(obj); | |
9811e353 AS |
102 | return 0; |
103 | } |