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
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.