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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_log_buf.c
Extension
.c
Size
407 bytes
Lines
25
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) 2021 Facebook */

#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>

int a[4];
const volatile int off = 4000;

SEC("raw_tp/sys_enter")
int good_prog(const void *ctx)
{
	a[0] = (int)(long)ctx;
	return a[1];
}

SEC("raw_tp/sys_enter")
int bad_prog(const void *ctx)
{
	/* out of bounds access */
	return a[off];
}

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

Annotation

Implementation Notes