struct _IOV_IRP_TRACE// Size=0x40
{
    struct _IRP * Irp;// Offset=0x0 Size=0x4
    struct _KTHREAD * Thread;// Offset=0x4 Size=0x4
    short KernelApcDisable;// Offset=0x8 Size=0x2
    short SpecialApcDisable;// Offset=0xa Size=0x2
    unsigned long CombinedApcDisable;// Offset=0x8 Size=0x4
    unsigned char Irql;// Offset=0xc Size=0x1
    void * StackTrace[12];// Offset=0x10 Size=0x30
};