IrqlKeApcLte1 rule (wdm)

The IrqlKeApcLte1 rule specifies that the driver calls the following kernel routines only when it is executing at IRQL <= APC_LEVEL:

• KeAcquireGuardedMutex

• KeAcquireGuardedMutexUnsafe

• KeDelayExecutionThread

• KeQueryActiveProcessors

• KeReleaseGuardedMutex

• KeReleaseGuardedMutexUnsafe

• KeTryToAcquireGuardedMutex

Driver model: WDM

Bug check(s) found with this rule: Bug Check 0xC4: DRIVER_VERIFIER_DETECTED_VIOLATION (0x0002000F)

How to test

At compile time
Run Static Driver Verifier and specify the IrqlKeApcLte1 rule. Use the following steps to run an analysis of your code: Prepare your code (use role type declarations). Run Static Driver Verifier. View and analyze the results. For more information, see Using Static Driver Verifier to Find Defects in Drivers.

At run time
Run Driver Verifier and select the DDI compliance checking option.

Applies to

KeAcquireGuardedMutex KeAcquireGuardedMutexUnsafe KeDelayExecutionThread KeQueryActiveProcessors KeReleaseGuardedMutex KeReleaseGuardedMutexUnsafe KeTryToAcquireGuardedMutex