EtwpFreeCompression

VOID __stdcall EtwpFreeCompression(_WMI_LOGGER_CONTEXT *LoggerContext){
  void *CompressionWorkspace; 
  _ETHREAD *CurrentThread; 
  unsigned int SessionId; 
  unsigned __int8 v5; 
  int v6; 
  bool v7; 
  __int64 v8; 
  _KLOCK_ENTRY *v9; 
  int v10; 
  unsigned int v11; 
  __int64 v12; 
  UINT64 a3; 

  KeRemoveQueueDpcEx(&LoggerContext->CompressionDpc, 0i64);
  if( LoggerContext->CompressionOn )
  {
    ExAcquirePushLockExclusiveEx(&LoggerContext->CompressionLock, 0i64);
    EtwpRelinquishCompressionTarget(LoggerContext);
    if( (_InterlockedExchangeAdd64(&LoggerContext->CompressionLock._bf_0, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock(&LoggerContext->CompressionLock);
    LODWORD(a3) = 0;
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    if( MiGetSystemRegionType((UINT64)&LoggerContext->CompressionLock) == 1 )
      SessionId = MmGetSessionIdEx(CurrentThread->Tcb.ApcState.Process);
    else
      SessionId = -1;
    --CurrentThread->Tcb.SpecialApcDisable;
    v5 = ++CurrentThread->Tcb.AbAllocationRegionCount;
    v6 = ((char)CurrentThread->Tcb.AbEntrySummary | (char)CurrentThread->Tcb.AbOrphanedEntrySummary) ^ 0x3F;
    while( 1 )
    {
      v7 = !_BitScanReverse((unsigned int *)&v8, v6);
      if( v7 )
        goto LABEL_12;
      v9 = &CurrentThread->Tcb.LockEntries[v8];
      v6 &= ~(1 << v8);
      if( (v9->AcquiredByte & 1) != 0
        && (v9->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 1) == 0
        && (v9->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 0x7FFFFFFFFFFFFFFCi64) == ((unsigned __int64)&LoggerContext->CompressionLock & 0x7FFFFFFFFFFFFFFCi64)
        && v9->LockState.SessionId == SessionId )
      {
        v9->AcquiredByte &= ~1u;
        if( v9->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 )
          break;
      }
    }
    if( !v9 )
    {
LABEL_12:
      if( (*(&CurrentThread->Tcb.MiscFlags + 1) & 0x10000) == 0 )
        KeBugCheckEx(0x162u, CurrentThread, &LoggerContext->CompressionLock, (PVOID)SessionId, 0i64);
      goto LABEL_24;
    }
    v9->CrossThreadReleasableAndBusyByte |= 2u;
    if( v9->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 < 0 )
      KiAbEntryRemoveFromTree(v9);
    v10 = v9->BoostBitmap.AllFields & 0x1FFFF;
    v11 = v9->BoostBitmap.AllFields & 0xFFFE0000;
    v9->ThreadLocalFlags &= ~1u;
    LODWORD(a3) = v10;
    v9->BoostBitmap.AllFields = v11;
    v9->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 = 0i64;
    v12 = v9 - CurrentThread->Tcb.LockEntries;
    if( v5 == 1 )
      CurrentThread->Tcb.AbEntrySummary |= 1 << v12;
    else
      _InterlockedOr8((volatile signed __int8 *)&CurrentThread->Tcb.AbOrphanedEntrySummary, 1 << v12);
LABEL_24:
    --CurrentThread->Tcb.AbAllocationRegionCount;
    KiAbThreadRemoveBoosts(&CurrentThread->Tcb, &LoggerContext->CompressionLock, &a3);
    v7 = CurrentThread->Tcb.SpecialApcDisable++ == -1;
    if( v7
      && ($F25F8C4BA33AF922A5F1AF68CD89DDDF *)CurrentThread->Tcb.ApcState.ApcListHead[0].Flink != &CurrentThread->Tcb.152 )
    {
      KiCheckForKernelApcDelivery();
    }
    _InterlockedExchange(&LoggerContext->CompressionOn, 0);
  }
  CompressionWorkspace = LoggerContext->CompressionWorkspace;
  if( CompressionWorkspace )
    ExFreePoolWithTag(CompressionWorkspace, 0);
  EtwpFreePlaceholderList(LoggerContext);
}

Referenced by: