mdbg can't debug my hello world program

Question

In order to try out mdbg, I have the following simple hello world program:

// kkk.cs
using System;

class HelloMain
{
    static public void Main()
    {
        Console.WriteLine("Hello");
    }
}

Compile it with csc /debug kkk.cs, this yields:

kkk.exe
kkk.pdb

I then do (from the visual studio command line):

mdbg kkk.exe

or

mdbg !r kkk.exe

I got:

Error: The request is not supported. (Exception from HRESULT: 0x80070032)

score 8 · Answer 1 · answered May 21 '12 at 15:06

8

I know this question is super old, but I just ran into this and found the 'fix' for this problem. Adding here for any other Googlers..

I have two directories:

Make sure you're launching the correct version (in my case, the x64 version) and doing a 'Run as Administrator' when opening the command prompt.

answered May 21 '12 at 15:06

mpeterson

2

I wanted the x64 build of mdbg so I followed the instructions above. But after I'd installed the SDK on my Win XP machine there was no .\x64 folder. When I repeated the SDK installation on a Win7 x64 machine the .\x64 folder was created and populated. – Brian THOMAS Mar 20 '14 at 10:29

score 7 · Answer 2 · answered Oct 07 '10 at 20:59

7

Try csc /debug /platform:x86 kkk.cs

You're running on 64-bit Windows. Mdbg is a 32-bit process and can only debug 32-bit processes.

answered Oct 07 '10 at 20:59

Tergiver

It is possible to let mdbg debug x64 binaries? Or, should I use x64 version mdbg? If mdbg is only able to debug x86 applications, is that too limited? – user469591 Oct 07 '10 at 21:08
I don't know if there is a 64-bit version of mdgb. I stopped trying to use it shortly after I encountered this same thing. VS is good enough for debugging managed apps 95% of the time. I use Windbg for that 5%. – Tergiver Oct 07 '10 at 21:12
Thanks for the help! It was very helpful! It seems that mdbg is indeed quite limited (if it is this case). – user469591 Oct 07 '10 at 21:24
Argggghhhhhh! Stupid thing just bit me :( – leppie Aug 04 '11 at 07:15

2 Answers2