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c#.netdebuggingmdbg

Cannot Detach from process using mdbg

Following on from this question I now have code that can attach to a process using the Mdbg API.

The problem is that I can't detach from the process if I need to. When I call mgProcess.Detach().WaitOne(); ( where mgProcess is a MDbgProcess created from an MDbgEngine object ) I get the following error message:

 Process not synchronized. (Exception from HRESULT: 0x80131302)
     at Microsoft.Samples.Debugging.CorDebug.NativeApi.ICorDebugController.Detach()
     at Microsoft.Samples.Debugging.CorDebug.CorController.Detach() in C:\mdbg\src\debugger\corapi\Controller.cs:line 89
     at Microsoft.Samples.Debugging.MdbgEngine.MDbgProcess.Detach() in C:\mdbg\src\debugger\mdbgeng\Process.cs:line 716

If I just try to call mgProcess.Detach() or mgProcess.CorProcess.Detach() I get the same result.

Does anyone know the correct way to detach an Mdbg process?

Solution

  • It transpires that Mdbg will not allow you to do anything while the debugee is running.

      MgProcess.CorProcess.Stop(0);
  MgProcess.Detach();

    Appears to be the way forward.