Re: Exception handling from a dll

From:
"Ben Voigt" <rbv@nospam.nospam>
Newsgroups:
microsoft.public.vc.language
Date:
Thu, 17 May 2007 10:37:57 -0500
Message-ID:
<#vwWAmJmHHA.3952@TK2MSFTNGP03.phx.gbl>
<paulodonohoe@yahoo.com> wrote in message
news:1179329957.878015.285770@y80g2000hsf.googlegroups.com...

I am calling into a dll from a simple driver. the dll has a number of
exported function (extern "C")
I have enabled the compiler switch /EHs to assume that extern C
functions can throw an exception. If I raise an exception in the dll
the exception is never caught by the drivers catch handler


You need /EHa to catch arbitrary exceptions from extern "C" functions and
hardware exceptions. /EHs enables only C++ exception handling, assuming
that extern "C" functions do *NOT* throw.

So from the driver :

try
{
// call into the dll
        LibraryFunctionCall();
}
catch(...)
{

   ...
}

the LibraryFunctionCall simply generates a throw 1 but it never gets
caught by the driver, instead generates a

"First-chance exception at 0x7c812a5b in clientDriver.exe: Microsoft C+
+ exception: int at memory location 0x0012feb0.."

From the Microsoft MSDN it seems that this should be possible.


Thanks for your help.

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