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Windows Driver Kit DDI reference (nf-wdm-iogetremainingstacksize)

IoGetRemainingStackSize function

Description

The IoGetRemainingStackSize routine returns the current amount of available kernel-mode stack space.

Return value

IoGetRemainingStackSize returns the number of bytes of stack space in the current thread context.

Remarks

Highest-level drivers, such as file systems, can call this routine, particularly drivers that use recursive code paths. Such a driver would call IoGetRemainingStackSize before launching a recursion to determine whether it should continue processing on an alternate code path.

For Windows Server 2003 Service Pack 1 (SP1) and later versions of Windows, callers of IoGetRemainingStackSize can be running at any IRQL. For earlier versions of Windows, the caller must be running at IRQL <= APC_LEVEL.