EtwpSetCompressionSettings

__int64 __fastcall EtwpSetCompressionSettings(_KSPIN_LOCK *a1){
  unsigned int v2; 
  _ESERVERSILO_GLOBALS *CurrentServerSiloGlobals; 
  _WMI_LOGGER_CONTEXT *v4; 
  _WMI_LOGGER_CONTEXT *v5; 
  UINT64 p_CompressionLock; 
  _ETHREAD *CurrentThread; 
  unsigned int SessionId; 
  unsigned __int8 v9; 
  int v10; 
  _KLOCK_ENTRY *v11; 
  bool v12; 
  __int64 v13; 
  int v14; 
  unsigned int v15; 
  __int64 v16; 
  UINT64 a3; 

  v2 = 0;
  CurrentServerSiloGlobals = PsGetCurrentServerSiloGlobals(a1);
  v4 = EtwpAcquireLoggerContextByLoggerId(CurrentServerSiloGlobals->EtwSiloState, (unsigned int)*a1, 0);
  v5 = v4;
  if( v4 )
  {
    p_CompressionLock = (UINT64)&v4->CompressionLock;
    ExAcquirePushLockExclusiveEx(&v4->CompressionLock, 0i64);
    v5->PartialBufferCompressionLevel = a1[1];
    v5->CompressionRatioGuess = a1[2];
    v5->CompressionResumptionMode = a1[3];
    if( (_InterlockedExchangeAdd64((volatile signed __int64 *)p_CompressionLock, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock((_EX_PUSH_LOCK *)p_CompressionLock);
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    LODWORD(a3) = 0;
    if( MiGetSystemRegionType(p_CompressionLock) == 1 )
      SessionId = MmGetSessionIdEx(CurrentThread->Tcb.ApcState.Process);
    else
      SessionId = -1;
    --CurrentThread->Tcb.SpecialApcDisable;
    v9 = ++CurrentThread->Tcb.AbAllocationRegionCount;
    v10 = ((char)CurrentThread->Tcb.AbEntrySummary | (char)CurrentThread->Tcb.AbOrphanedEntrySummary) ^ 0x3F;
    while( 1 )
    {
      v12 = !_BitScanReverse((unsigned int *)&v13, v10);
      if( v12 )
        goto LABEL_15;
      v11 = &CurrentThread->Tcb.LockEntries[v13];
      v10 &= ~(1 << v13);
      if( (v11->AcquiredByte & 1) != 0
        && (v11->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 1) == 0
        && (v11->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 0x7FFFFFFFFFFFFFFCi64) == (p_CompressionLock & 0x7FFFFFFFFFFFFFFCi64)
        && v11->LockState.SessionId == SessionId )
      {
        v11->AcquiredByte &= ~1u;
        if( v11->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 )
          break;
      }
    }
    if( !v11 )
    {
LABEL_15:
      if( (*(&CurrentThread->Tcb.MiscFlags + 1) & 0x10000) == 0 )
        KeBugCheckEx(0x162u, CurrentThread, (PVOID)p_CompressionLock, (PVOID)SessionId, 0i64);
      goto LABEL_22;
    }
    v11->CrossThreadReleasableAndBusyByte |= 2u;
    if( v11->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 < 0 )
      KiAbEntryRemoveFromTree(v11);
    v14 = v11->BoostBitmap.AllFields & 0x1FFFF;
    v15 = v11->BoostBitmap.AllFields & 0xFFFE0000;
    v11->ThreadLocalFlags &= ~1u;
    LODWORD(a3) = v14;
    v11->BoostBitmap.AllFields = v15;
    v11->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 = 0i64;
    v16 = v11 - CurrentThread->Tcb.LockEntries;
    if( v9 == 1 )
      CurrentThread->Tcb.AbEntrySummary |= 1 << v16;
    else
      _InterlockedOr8((volatile signed __int8 *)&CurrentThread->Tcb.AbOrphanedEntrySummary, 1 << v16);
LABEL_22:
    --CurrentThread->Tcb.AbAllocationRegionCount;
    KiAbThreadRemoveBoosts(&CurrentThread->Tcb, (VOID *)p_CompressionLock, &a3);
    v12 = CurrentThread->Tcb.SpecialApcDisable++ == -1;
    if( v12
      && ($F25F8C4BA33AF922A5F1AF68CD89DDDF *)CurrentThread->Tcb.ApcState.ApcListHead[0].Flink != &CurrentThread->Tcb.152 )
    {
      KiCheckForKernelApcDelivery();
    }
    EtwpReleaseLoggerContext(v5, 0);
  }
  else
  {
    return(unsigned int)-1073741811;
  }
  return v2;
}

Referenced by: