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文字

在头文件<stdlib.h>中定义



void abort_handler_s(const char * restrict msg,void * restrict ptr,errno_t error);


(自C11以来)

写入一个实现定义的消息,stderr其中必须包含指向的字符串msg和调用abort()

可以将指向此函数的指针传递给set_constraint_handler_s以建立运行时约束违规处理程序。与所有边界检查的函数一样,abort_handler_s只有__STDC_LIB_EXT1__在实现定义并且用户在包含之前定义__STDC_WANT_LIB_EXT1__为整数常量时1才能保证可用<stdlib.h>

参数

msg

-

指向写入标准错误流的消息的指针

ptr

-

指向实现定义的对象或空指针的指针。实现定义对象的示例是对象,该对象给出检测到违规的函数的名称以及检测到违规时的行号

error

-

errno_t类型的正值

返回值

没有; 这个函数不会返回给调用者。

注意

如果set_constraint_handler_s是从来不叫,默认的处理程序是实现定义的:它可能是abort_handler_signore_handler_s或其他一些实现定义的处理程序。

示例


#define __STDC_WANT_LIB_EXT1__ 1#include <string.h>#include <stdio.h>#include <stdlib.h>
 int main(void){#ifdef __STDC_LIB_EXT1__
    char dst[2];    set_constraint_handler_s(ignore_handler_s);
    int r = strcpy_s(dst, sizeof dst, "Too long!");    printf("dst = \"%s\", r = %d\n", dst, r);    set_constraint_handler_s(abort_handler_s);
    r = strcpy_s(dst, sizeof dst, "Too long!");    printf("dst = \"%s\", r = %d\n", dst, r);#endif}


可能的输出:


dst = "", r = 22abort_handler_s was called in response to a runtime-constraint violation.
 The runtime-constraint violation was caused by the following expression in strcpy_s:(s1max <= (s2_len=strnlen_s(s2, s1max)) ) (in string_s.c:62)
 Note to end users: This program was terminated as a resultof a bug present in the software. Please reach out to your
software's vendor to get more help.Aborted


参考

  • C11标准(ISO/IEC 9899:2011):

    • K.3.6.1.2 abort_handler_s函数(p:605)

另请参阅

ignore_handler_s(C11)

忽略边界检查函数的回调(函数)

set_constraint_handler_s(C11)

为边界检查函数(函数)设置错误回调

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