!wudfext.umdevstack

  • Article

The !wudfext.umdevstack extension displays detailed information about a device stack in the host process.

!wudfext.umdevstack DevstackAddress [Flags]

Parameters

DevstackAddress
Specifies the address of the device stack to display information about.

Flags
Optional. Specifies the type of information to be displayed. Flags can be any combination of the following bits. The default value is 0x01.

Bit 0 (0x01)
Displays detailed information about the device stack.

Bit 8 (0x80)
Displays information about the internal framework.

DLL

Wudfext.dll

Additional Information

For more information, see User-Mode Driver Framework Debugging.

Remarks

The following is an example of the !wudfext.umdevstack display:

kd> !umdevstack 0x0034e4e0
Device Stack: 0x0034e4e0  Pdo Name: \Device\00000057
 Number of UM drivers: 0x1
  Driver 00:
    Driver Config Registry Path: WUDFEchoDriver
    UMDriver Image Path: C:\Windows\system32\DRIVERS\UMDF\WUDFEchoDriver.dll
    Fx Driver: IWDFDriver 0xf2db8
    Fx Device: IWDFDevice 0xf2f80
        IDriverEntry: WUDFEchoDriver!CMyDriver 0x000f2c70