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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/bpf/progs/iters_num.c
Extension
.c
Size
4285 bytes
Lines
243
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) 2023 Meta Platforms, Inc. and affiliates. */

#include <limits.h>
#include <linux/errno.h>
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include "bpf_misc.h"

const volatile __s64 exp_empty_zero = 0 + 1;
__s64 res_empty_zero;

SEC("raw_tp/sys_enter")
int num_empty_zero(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, 0, 0) sum += i;
	res_empty_zero = 1 + sum;

	return 0;
}

const volatile __s64 exp_empty_int_min = 0 + 2;
__s64 res_empty_int_min;

SEC("raw_tp/sys_enter")
int num_empty_int_min(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, INT_MIN, INT_MIN) sum += i;
	res_empty_int_min = 2 + sum;

	return 0;
}

const volatile __s64 exp_empty_int_max = 0 + 3;
__s64 res_empty_int_max;

SEC("raw_tp/sys_enter")
int num_empty_int_max(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, INT_MAX, INT_MAX) sum += i;
	res_empty_int_max = 3 + sum;

	return 0;
}

const volatile __s64 exp_empty_minus_one = 0 + 4;
__s64 res_empty_minus_one;

SEC("raw_tp/sys_enter")
int num_empty_minus_one(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, -1, -1) sum += i;
	res_empty_minus_one = 4 + sum;

	return 0;
}

const volatile __s64 exp_simple_sum = 9 * 10 / 2;
__s64 res_simple_sum;

SEC("raw_tp/sys_enter")
int num_simple_sum(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, 0, 10) sum += i;
	res_simple_sum = sum;

	return 0;
}

const volatile __s64 exp_neg_sum = -11 * 10 / 2;
__s64 res_neg_sum;

SEC("raw_tp/sys_enter")
int num_neg_sum(const void *ctx)
{
	__s64 sum = 0, i;

	bpf_for(i, -10, 0) sum += i;
	res_neg_sum = sum;

Annotation

Implementation Notes