1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* Copyright (c) 2021 Facebook */ |
3 | #include "vmlinux.h" |
4 | #include <bpf/bpf_helpers.h> |
5 | #include <bpf/bpf_tracing.h> |
6 | #include "bpf_misc.h" |
7 | |
8 | char LICENSE[] SEC("license" ) = "GPL" ; |
9 | |
10 | int pid = 0; |
11 | int fentry_cnt = 0; |
12 | int fexit_cnt = 0; |
13 | |
14 | SEC("fentry/" SYS_PREFIX "sys_nanosleep" ) |
15 | int nanosleep_fentry(void *ctx) |
16 | { |
17 | if (bpf_get_current_pid_tgid() >> 32 != pid) |
18 | return 0; |
19 | |
20 | fentry_cnt++; |
21 | return 0; |
22 | } |
23 | |
24 | SEC("fexit/" SYS_PREFIX "sys_nanosleep" ) |
25 | int nanosleep_fexit(void *ctx) |
26 | { |
27 | if (bpf_get_current_pid_tgid() >> 32 != pid) |
28 | return 0; |
29 | |
30 | fexit_cnt++; |
31 | return 0; |
32 | } |
33 | |