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Checked Build Breakpoints and Messages

Last Updated: 11/22/2016

This topic contains a list and explanation of some of the common breakpoints and DbgPrint messages that a driver might encounter in the checked build.

*** DPC routine > 1 sec --- This is not a break in KeUpdateSystemTime
This message appears just before a breakpoint is issued. It indicates that the active driver spent more than one second in a DPC routine.

*** ISR at 0xnnnnnnnntook over .5 second
This message appears just before a breakpoint is issued. It indicates that the interrupt service routine with entry point 0xnnnnnnnn executed for more than 500ms.

IOINIT: Built-in driverxxxxxxfailed to initialize − 0xnnnnnnnn
The boot start driver named xxxxxx returned a failure status 0xnnnnnnnn from its DriverEntry entry point.

IOINIT: Built-in driverxxxxxxtooky.zs to initialize
The boot start driver named xxxxxx executed for y.z seconds (which is longer than the expected maximum time of 5 seconds) in its DriverEntry entry point.

IOINIT: Built-in driverxxxxxxtooky.zs to fail initialization
The boot start driver named xxxxxx executed for y.z seconds (which is longer than the expected maximum time of 5 seconds) in its DriverEntry entry point.

IOLOAD: Driverxxxxxxtooky.zs to initialize
The driver named xxxxxx executed for y.z seconds (which is longer than the expected maximum time of 5 seconds) in its DriverEntry entry point.

IOLOAD: Driverxxxxxxtooky.zs to fail initialization
The driver named xxxxxx executed for y.z seconds (which is longer than the expected maximum time of 5 seconds) in its DriverEntry entry point.

IopLoadDriver: A PnP driverxxxxxxdoes not support DriverUnload routine
The driver named xxxxxx supports IRP_MJ_PNP, but did not specify an unload routine in DriverEntry.

DO_DEVICE_INITIALIZING flag not cleared on DO 0xnnnnnnnn
The device object at address 0xnnnnnnnn was created outside of DriverEntry, but the DO_DEVICE_INITIALIZING bit was not cleared before returning to the system.

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