abort_handler_s

abort_handler_s

在头文件中定义
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 = 22 abort_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 result of 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):

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