69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BR_BUG_H
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#define _BR_BUG_H
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include "likely.h"
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#include "debug.h"
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/* BUG functions inspired by Linux kernel's <asm/bug.h>
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*/
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#define panic() exit(0xff)
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/*
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* Don't use BUG() or BUG_ON() unless there's really no way out; one
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* example might be detecting data structure corruption in the middle
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* of an operation that can't be backed out of. If the (sub)system
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* can somehow continue operating, perhaps with reduced functionality,
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* it's probably not BUG-worthy.
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*
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*/
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#define BUG() do { \
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fprintf(stderr, "BUG: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
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panic(); \
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} while (0)
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#define BUG_ON(condition) do { if (unlikely(condition)) BUG(); } while (0)
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/*
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* WARN(), WARN_ON(), WARN_ON_ONCE, and so on can be used to report significant
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* issues that need prompt attention if they should ever appear at runtime.
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*
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* Do not use these macros when checking for invalid external inputs
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* (e.g. invalid system call arguments, or invalid data coming from
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* network/devices), and on transient conditions like ENOMEM or EAGAIN.
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* These macros should be used for recoverable kernel issues only.
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* For invalid external inputs, transient conditions, etc use
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* pr_err[_once/_ratelimited]() followed by dump_stack(), if necessary.
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* Do not include "BUG"/"WARNING" in format strings manually to make these
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* conditions distinguishable from kernel issues.
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*
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* Use the versions with printk format strings to provide better diagnostics.
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*/
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#define __WARN() do { \
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fprintf(stderr, "WARNING: failure at %s:%d/%s()!\n", __FILE__, __LINE__, __func__); \
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} while (0)
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#define __WARN_printf(arg...) do { \
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vfprintf(stderr, arg); \
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} while (0)
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#define WARN_ON(condition) ({ \
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int __ret_warn_on = !!(condition); \
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if (unlikely(__ret_warn_on)) \
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__WARN(); \
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unlikely(__ret_warn_on); \
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})
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#define WARN(condition, format...) ({ \
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int __ret_warn_on = !!(condition); \
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if (unlikely(__ret_warn_on)) \
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__WARN_printf(format); \
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unlikely(__ret_warn_on); \
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})
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#endif /* _BR_BUG_H */
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