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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/test_obj_id.c
Extension
.c
Size
478 bytes
Lines
27
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-only
/* Copyright (c) 2017 Facebook
 */
#include <stddef.h>
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

struct {
	__uint(type, BPF_MAP_TYPE_ARRAY);
	__uint(max_entries, 1);
	__type(key, __u32);
	__type(value, __u64);
} test_map_id SEC(".maps");

SEC("raw_tp/sys_enter")
int test_obj_id(void *ctx)
{
	__u32 key = 0;
	__u64 *value;

	value = bpf_map_lookup_elem(&test_map_id, &key);
	__sink(value);

	return 0;
}

Annotation

Implementation Notes