IopInitActivityIdIrp

VOID __stdcall IopInitActivityIdIrp(_IRP *Irp){
  char v2; 
  __m128i *RelatedActivityId; 
  const _EVENT_DESCRIPTOR *v4; 
  _ETHREAD *CurrentThread; 
  _GUID *v6; 
  __int64 v7; 
  char v8; 
  _LPGUID ActivityId[4]; 
  __m128i v10; 

  *(_OWORD *)ActivityId = 0i64;
  v10 = 0i64;
  v2 = 0;
  RelatedActivityId = 0i64;
  v4 = 0i64;
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  if( (KeGetPcr()->Prcb._bf_0 & 0x10001) == 0 )
  {
    v6 = (_GUID *)CurrentThread->ActivityId;
    if( v6 )
    {
      if( IopIsActivityTracingEventEnabled(&IoTrace_KernelIo_AllocateIrp) )
      {
        RelatedActivityId = (__m128i *)v6;
        v4 = &IoTrace_KernelIo_AllocateIrp;
        goto LABEL_18;
      }
      *(_GUID *)ActivityId = *v6;
LABEL_17:
      v2 = 1;
      goto LABEL_18;
    }
    if( PnpIsSafeToExamineUserModeTeb() && (Irp->AllocationFlags & 0x21) != 33 )
    {
      v8 = 0;
      if( KeGetPcr()->NtTib.$8E581AA5F14182E3A9376D7C6777905F::$DDD217EC770DED536E77C25F6874D4CC::Self )
      {
        v10 = *(__m128i *)&KeGetPcr()->NtTib.$8E581AA5F14182E3A9376D7C6777905F::$DDD217EC770DED536E77C25F6874D4CC::Self[105].SubSystemTib;
        v8 = 1;
      }
      if( v8 )
      {
        v7 = *(_QWORD *)&NullGuid.Data1 - v10.m128i_i64[0];
        if( *(_QWORD *)&NullGuid.Data1 == v10.m128i_i64[0] )
          v7 = *(_QWORD *)NullGuid.Data4 - _mm_srli_si128(v10, 8).m128i_u64[0];
        if( v7 )
        {
          if( IopIsActivityTracingEventEnabled(&IoTrace_UserInitiatedIo) )
          {
            RelatedActivityId = &v10;
            v4 = &IoTrace_UserInitiatedIo;
            goto LABEL_18;
          }
          *(__m128i *)ActivityId = v10;
          goto LABEL_17;
        }
      }
    }
  }
LABEL_18:
  if( !v2 )
    EtwActivityIdControl(3ui64, (_GUID *)ActivityId);
  if( IoSetActivityIdIrp(Irp, (_GUID *)ActivityId) >= 0 )
  {
    *(_WORD *)Irp->Tail.IrpExtension |= 2u;
    if( RelatedActivityId )
      EtwWriteEx(*(&stru_140C452E0 + 328), v4, 0i64, 0, (_LPCGUID)ActivityId, (_LPCGUID)RelatedActivityId, 0, 0i64);
  }
}

Referenced by: