abort_handler_s
定义于头文件 <stdlib.h>
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void abort_handler_s( const char * restrict msg, void * restrict ptr, |
(C11 起) | |
写入必须包含 msg
所指向字符串的实现定义消息到 stderr ,然后调用 abort() 。
指向此函数的指针可以传递给 set_constraint_handler_s 以建立运行时制约违规处理。
- 同所有边界检查函数,
abort_handler_s
仅若实现定义了 __STDC_LIB_EXT1__ ,且用户在包含<stdlib.h>
前定义 __STDC_WANT_LIB_EXT1__ 为整数常量 1 才保证可用。
参数
msg | - | 指向要写到标准错误输出的消息的指针 |
ptr | - | 指向实现定义的对象的指针或空指针。实现定义对象的例子,是给出检测到违规的函数名和检测到违规时的行号的对象 |
error | - | errno_t 类型的正值 |
返回值
无;此函数不对其调用者返回
注意
若从未调用 set_constraint_handler_s
,则默认处理函数是实现定义的:可以为 abort_handler_s 、 ignore_handler_s 或另外的实现定义处理函数。
示例
运行此代码
#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
引用
- C11 standard (ISO/IEC 9899:2011):
- K.3.6.1.2 The abort_handler_s function (p: 605)
参阅
(C11) |
边界检查函数的忽略回调 (函数) |
设置边界检查函数的出错回调 (函数) |