1// SPDX-License-Identifier: GPL-2.0
2/* Copyright (c) 2019 Facebook */
3#include <stdbool.h>
4#include <stddef.h>
5#include <linux/bpf.h>
6#include <linux/ptrace.h>
7#include <bpf/bpf_helpers.h>
8#include <bpf/bpf_tracing.h>
9
10struct task_struct;
11
12SEC("kprobe/__set_task_comm")
13int BPF_KPROBE(prog1, struct task_struct *tsk, const char *buf, bool exec)
14{
15 return !tsk;
16}
17
18SEC("kretprobe/__set_task_comm")
19int BPF_KRETPROBE(prog2, int ret)
20{
21 return ret;
22}
23
24SEC("raw_tp/task_rename")
25int prog3(struct bpf_raw_tracepoint_args *ctx)
26{
27 return !ctx->args[0];
28}
29
30SEC("fentry/__set_task_comm")
31int BPF_PROG(prog4, struct task_struct *tsk, const char *buf, bool exec)
32{
33 return 0;
34}
35
36SEC("fexit/__set_task_comm")
37int BPF_PROG(prog5, struct task_struct *tsk, const char *buf, bool exec)
38{
39 return 0;
40}
41
42char _license[] SEC("license") = "GPL";
43

source code of linux/tools/testing/selftests/bpf/progs/test_overhead.c