tools/testing/selftests/bpf/progs/test_overhead.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/bpf/progs/test_overhead.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_overhead.c
Extension
.c
Size
758 bytes
Lines
40
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2019 Facebook */
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>

struct task_struct;

SEC("kprobe/__set_task_comm")
int BPF_KPROBE(prog1, struct task_struct *tsk, const char *buf, bool exec)
{
	return !tsk;
}

SEC("kretprobe/__set_task_comm")
int BPF_KRETPROBE(prog2, int ret)
{
	return ret;
}

SEC("raw_tp/task_rename")
int prog3(struct bpf_raw_tracepoint_args *ctx)
{
	return !ctx->args[0];
}

SEC("fentry/__set_task_comm")
int BPF_PROG(prog4, struct task_struct *tsk, const char *buf, bool exec)
{
	return 0;
}

SEC("fexit/__set_task_comm")
int BPF_PROG(prog5, struct task_struct *tsk, const char *buf, bool exec)
{
	return 0;
}

char _license[] SEC("license") = "GPL";

Annotation

Implementation Notes