请教P71页的小程序

《软件调试》答疑

请教P71页的小程序

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Landy 2010-03-08, 21:32 下午
P71页清单3-1 演示错误类异常的Fault小程序

在我的Visual Studio 2008的环境里，运行这个程序，进入无限循环。输出结果是

Before div in __try block:nDividend=22, nDivisor=0, nResult=100
In __except block: nDividend=22, nDivisor=0, nResult=100
Divided by zero detected: nDividend=22, nDivisor=1, nResult=100
In __except block: nDividend=22, nDivisor=1, nResult=100
Divided by zero detected: nDividend=22, nDivisor=1, nResult=100
In __except block: nDividend=22, nDivisor=1, nResult=100
Divided by zero detected: nDividend=22, nDivisor=1, nResult=100
In __except block: nDividend=22, nDivisor=1, nResult=100
Divided by zero detected: nDividend=22, nDivisor=1, nResult=100
In __except block: nDividend=22, nDivisor=1, nResult=100
Divided by zero detected: nDividend=22, nDivisor=1, nResult=100
In __except block: nDividend=22, nDivisor=1, nResult=100
//Ctrl+C..

从输出看，nDivisor已经是1了，为什么还在不断触发DIVIDE_BY_ZERO异常？

谢谢！

Re: 请教P71页的小程序

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格蠹老雷 2010-03-09, 12:44 下午
因为VS2K8产生的除法指令是用寄存器做除数，请参考下面这个帖子来解决这个问题：
http://advdbg.com/forums/1292/ShowPost.aspx

Re: 请教P71页的小程序

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Landy 2010-03-09, 21:31 下午
谢谢张老师！