Summary of Debugger Extensions in Wdfkd.dll

The Windows Driver Kit (WDK) includes a debugger extension library, named Wdfkd.dll. This library contains debugger extension commands that you can use to debug both Kernel-Mode Driver Framework (KMDF) and User-Mode Driver Framework (UMDF) drivers starting with version 2.

For a complete description of each command, see Windows Driver Framework Extensions (Wdfkd.dll). For more information about all available debugger extension libraries, see the documentation that is supplied with the Windows Debugging package.

You can find a video series that demonstrates how to debug a KMDF driver at Videos: Debugging KMDF Drivers.

To debug a driver that uses UMDF version 1.11 or earlier, you must instead use the Wudfext.dll debugger extension library. For more info, see User-Mode Driver Framework Extensions (Wudfext.dll).

The extension commands that the Wdfkd.dll extension library provides include:

Extension	Description	Frameworks
!wdfkd.wdfhelp	Displays this list of debugger extensions.
!wdfkd.wdfchildlist	Displays a child list's state and information about all of the device identification descriptions that are in the child list.	KMDF
!wdfkd.wdfcollection	Displays the objects that are contained in a collection.	KMDF UMDF 2
!wdfkd.wdfcommonbuffer	Displays information about a common buffer object.	KMDF UMDF 2
!wdfkd.wdfcrashdump	Displays the framework's event log records, if available, from a small memory dump. The framework's event log records are available if ForceLogsInMiniDump is set in the registry, or if the framework can determine that your driver caused the bug check.	KMDF
!wdfkd.wdfdevext	Displays the WDFDEVICE-typed object handle that is associated with the DeviceExtension member of a Microsoft Windows Driver Model (WDM) DEVICE_OBJECT structure.	KMDF UMDF 1 UMDF 2
!wdfkd.wdfdevice	Displays information that is associated with a WDFDEVICE-typed handle.	KMDF UMDF 2
!wdfkd.wdfdeviceinterrupts	Displays all the interrupt objects for a specified device handle	KMDF UMDF 2
!wdfkd.wdfdevicequeues	Displays information about all of the queue objects that belong to a specified device.	KMDF UMDF 2
!wdfkd.wdfdmaenabler	Displays information about a DMA enabler object, along with its associated DMA transaction objects and common buffer objects.	KMDF
!wdfkd.wdfdmaenablers	Displays a summary of all DMA enabler objects, DMA transaction objects, and common buffer objects that are associated with a specified device object.	KMDF
!wdfkd.wdfdmatransaction	Displays information about a WDF direct memory access (DMA) transaction object.	KMDF
!wdfkd.wdfdriverinfo	Displays information about a framework-based driver, such as its library version and hierarchy of object handles.	KMDF UMDF 2
!wdfkd.wdfextendwatchdog	Extends the time-out period (from 10 minutes to 24 hours) of the framework's watchdog timer during power transitions.	KMDF
!wdfkd.wdffindobjects	Finds and displays framework objects.	KMDF UMDF 2
!wdfkd.wdfforwardprogress	Displays information about the guaranteed forward progress capabilities of an I/O queue.	KMDF
!wdfkd.wdfgetdriver	Displays the driver name.	KMDF UMDF 2
!wdfkd.wdfhandle	Displays information about a framework object handle.	KMDF UMDF 2
!wdfkd.wdfinterrupt	Displays information about a framework interrupt object handle.	KMDF UMDF 2
!wdfkd.wdfiotarget	Displays information about a WDFIOTARGET-typed object handle.	KMDF UMDF 2
!wdfkd.wdfldr	Displays information about all of the drivers that are using the framework library.	KMDF UMDF 1 UMDF 2
!wdfkd.wdflogdump	Displays the framework's event log records, if available, from a complete memory dump, a kernel memory dump, or a live kernel-mode target.	KMDF UMDF 2
!wdfkd.wdflogsave	Saves the framework's event log records in an event trace log (.etl) file that you can view by using TraceView.	KMDF UMDF 2
!wdfkd.wdfmemory	Displays a memory object's buffer address and size.	KMDF UMDF 2
!wdfkd.wdfobject	Displays information about a framework object.	KMDF UMDF 2
!wdfkd.wdfopenhandles	Displays information about all the handles that are open on the specified WDF device.	KMDF UMDF 2
!wdfkd.wdfpoolusage	Displays a driver's memory pool usage.	KMDF UMDF 2
!wdfkd.wdfqueue	Displays information about a WDFQUEUE-typed object handle.	KMDF UMDF 2
!wdfkd.wdfrequest	Displays information about a WDFREQUEST-typed object handle.	KMDF UMDF 2
!wdfkd.wdfsearchpath	Sets the search path for locating the framework log's format files.	KMDF UMDF 2
!wdfkd.wdfsettraceprefix	Sets a prefix string for tracing messages in the framework's event log.	KMDF UMDF 2
!wdfkd.wdfsetdriver	Sets a driver name that is used as a default name for other commands that require a driver name.	KMDF UMDF 2
!wdfkd.wdfspinlock	Displays information about a framework spin-lock object. This information includes the spin lock's acquisition history and the length of time that the lock was held.	KMDF UMDF 2
!wdfkd.wdftagtracker	Displays tag information (including the tag value, line, file, and time) for a specified object tag.	KMDF UMDF 2
!wdfkd.wdftmffile	Specifies the trace message format (.tmf) files that the !wdflogdump extension will use to display event log records.	KMDF UMDF 2
!wdfkd.wdftraceprtdebug	Turns on the TracePrt diagnostic mode.	KMDF UMDF 2
!wdfkd.wdfumdevstack	Displays detailed information about a UMDF device stack in the implicit process.	UMDF 2
!wdfkd.wdfumdevstacks	Displays information about all UMDF device stacks in the implicit process.	UMDF 2
!wdfkd.wdfumdownirp	Displays the kernel-mode I/O request packet (IRP) that is associated with a specified user-mode IRP.	UMDF 2
!wdfkd.wdfumfile	Displays information about a UMDF intra-stack file.	UMDF 2
!wdfkd.wdfumirp	Displays information about a user-mode I/O request packet (UM IRP).	UMDF 2
!wdfkd.wdfumirps	Displays the list of pending user-mode I/O request packets (UM IRPs) in the implicit process.	UMDF 2
!wdfkd.wdfusbdevice	Displays information about a WDFUSBDEVICE-typed object handle.	KMDF UMDF 2
!wdfkd.wdfusbinterface	Displays information about a WDFUSBINTERFACE-typed object handle.	KMDF UMDF 2
!wdfkd.wdfusbpipe	Displays information about a WDFUSBPIPE-typed object handle.	KMDF UMDF 2
!wdfkd.wdfwmi	Displays a device's Windows Management Instrumentation (WMI) information.	KMDF