test_overhead.c

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