los_err.c

/*
 * Copyright (c) 2013-2019 Huawei Technologies Co., Ltd. All rights reserved.
 * Copyright (c) 2020-2021 Huawei Device Co., Ltd. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 *    conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice, this list
 *    of conditions and the following disclaimer in the documentation and/or other materials
 *    provided with the distribution.
 *
 * 3. Neither the name of the copyright holder nor the names of its contributors may be used
 *    to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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 */

#include "los_err.h"

/******************************************************************************
基本概念
	错误处理指程序运行错误时，调用错误处理模块的接口函数，上报错误信息，并调用注册的钩子函数
	进行特定处理，保存现场以便定位问题。通过错误处理，可以控制和提示程序中的非法输入，防止程序崩溃。

运作机制
	错误处理是一种机制，用于处理异常状况。当程序出现错误时，会显示相应的错误码。
	此外，如果注册了相应的错误处理函数，则会执行这个函数。

系统中只有一个错误处理的钩子函数。当多次注册钩子函数时，最后一次注册的钩子函数会覆盖前一次注册的函数

******************************************************************************/
LITE_OS_SEC_BSS STATIC LOS_ERRORHANDLE_FUNC g_errHandleHook = NULL;//错误接管钩子函数
/******************************************************************************
调用钩子函数，处理错误
	fileName：存放错误日志的文件名,系统内部调用时，入参为"os_unspecific_file"
	lineNo：发生错误的代码行号系统内部调用时，若值为0xa1b2c3f8，表示未传递行号
	errnoNo：错误码
	paraLen：入参para的长度系统内部调用时，入参为0
	para：错误标签系统内部调用时，入参为NULL
******************************************************************************/
LITE_OS_SEC_TEXT_INIT UINT32 LOS_ErrHandle(CHAR *fileName, UINT32 lineNo, UINT32 errorNo,
                                           UINT32 paraLen, VOID *para)
{
    if (g_errHandleHook != NULL) {
        g_errHandleHook(fileName, lineNo, errorNo, paraLen, para);
    }

    return LOS_OK;
}
//设置钩子函数，处理错误
LITE_OS_SEC_TEXT_INIT VOID LOS_SetErrHandleHook(LOS_ERRORHANDLE_FUNC fun)
{
    g_errHandleHook = fun;
}