What to do with .mdump/.hdump files?

I am working on a MySQL开发者_如何学运维 user-defined function (UDF) that is basically a wrapper for a Windows system function. My problem is that the UDF works as intended for certain inputs, but causes mysqld to crash for others.

The UDF itself takes a single integer argument that is passed unmodified as a ULONG parameter to the WinAPI function. When this integer is less than a certain number k, everything is fine; but, when the integer is greater than or equal to k, the MySQL server process (mysqld.exe) consistently crashes.

My 64-bit Windows 7 machine always generates "AppCrash" details that include an MDUMP and HDUMP file. Is there a way to open either of these files in Visual C++ to examine the stack trace at the time of the crash?

I believe you can open crash dumps in Visual Studio. Windbg is (IMO) the preferred method as it is more powerful, but if all you need is a simple stack trace then Visual Studio would be sufficient.