EtwpCompressPendingBuffers

VOID __stdcall EtwpCompressPendingBuffers(_WMI_LOGGER_CONTEXT *LoggerContext){
  unsigned __int64 p_CompressionLock; 
  UINT64 PerformanceCounter; 
  _WMI_BUFFER_HEADER *v4; 
  _WMI_BUFFER_HEADER *v5; 
  UINT64 v6; 
  _LARGE_INTEGER BufferCompressDuration; 
  _LARGE_INTEGER v8; 
  _ETHREAD *CurrentThread; 
  unsigned int SessionId; 
  unsigned __int8 v11; 
  int v12; 
  _KLOCK_ENTRY *v13; 
  bool v14; 
  __int64 v15; 
  int v16; 
  unsigned int v17; 
  __int64 v18; 
  UINT64 a3; 

  p_CompressionLock = (unsigned __int64)&LoggerContext->CompressionLock;
  ExAcquirePushLockExclusiveEx(&LoggerContext->CompressionLock, 0i64);
  EtwpRotateCompressionTargetIfNeeded(LoggerContext);
  while( 1 )
  {
    PerformanceCounter = KeQueryPerformanceCounter(0i64);
    v4 = EtwpDequeueBufferPendingCompression(LoggerContext);
    v5 = v4;
    if( !v4 )
      break;
    if( *((int *)v4 + 3) > 0 || *((_DWORD *)v4 + 1) > 0x48u && *((_DWORD *)v4 + 2) > 0x48u )
    {
      if( EtwpCompressBuffer(LoggerContext, v4) < 0 )
        _InterlockedAdd((volatile signed __int32 *)&LoggerContext->LogBuffersLost, 1u);
      EtwpCompleteBuffer(LoggerContext, v5, 0i64);
      v6 = KeQueryPerformanceCounter(0i64);
      BufferCompressDuration = LoggerContext->BufferCompressDuration;
      v8.QuadPart = v6 - PerformanceCounter;
      if( BufferCompressDuration.QuadPart )
        LoggerContext->BufferCompressDuration.QuadPart = (v8.QuadPart + 4 * BufferCompressDuration.QuadPart) / 5;
      else
        LoggerContext->BufferCompressDuration = v8;
    }
    else
    {
      EtwpCompleteBuffer(LoggerContext, v4, 0i64);
    }
  }
  if( (_InterlockedExchangeAdd64((volatile signed __int64 *)p_CompressionLock, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
    ExfTryToWakePushLock((_EX_PUSH_LOCK *)p_CompressionLock);
  LODWORD(a3) = 0;
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  if( MiGetSystemRegionType(p_CompressionLock) == 1 )
    SessionId = MmGetSessionIdEx(CurrentThread->Tcb.ApcState.Process);
  else
    SessionId = -1;
  --CurrentThread->Tcb.SpecialApcDisable;
  v11 = ++CurrentThread->Tcb.AbAllocationRegionCount;
  v12 = ((char)CurrentThread->Tcb.AbEntrySummary | (char)CurrentThread->Tcb.AbOrphanedEntrySummary) ^ 0x3F;
  while( 1 )
  {
    v14 = !_BitScanReverse((unsigned int *)&v15, v12);
    if( v14 )
      goto LABEL_24;
    v13 = &CurrentThread->Tcb.LockEntries[v15];
    v12 &= ~(1 << v15);
    if( (v13->AcquiredByte & 1) != 0
      && (v13->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 1) == 0
      && (v13->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 0x7FFFFFFFFFFFFFFCi64) == (p_CompressionLock & 0x7FFFFFFFFFFFFFFCi64)
      && v13->LockState.SessionId == SessionId )
    {
      v13->AcquiredByte &= ~1u;
      if( v13->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 )
        break;
    }
  }
  if( !v13 )
  {
LABEL_24:
    if( (*(&CurrentThread->Tcb.MiscFlags + 1) & 0x10000) == 0 )
      KeBugCheckEx(0x162u, CurrentThread, (PVOID)p_CompressionLock, (PVOID)SessionId, 0i64);
    goto LABEL_31;
  }
  v13->CrossThreadReleasableAndBusyByte |= 2u;
  if( v13->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 < 0 )
    KiAbEntryRemoveFromTree(v13);
  v16 = v13->BoostBitmap.AllFields & 0x1FFFF;
  v17 = v13->BoostBitmap.AllFields & 0xFFFE0000;
  v13->ThreadLocalFlags &= ~1u;
  LODWORD(a3) = v16;
  v13->BoostBitmap.AllFields = v17;
  v13->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 = 0i64;
  v18 = v13 - CurrentThread->Tcb.LockEntries;
  if( v11 == 1 )
    CurrentThread->Tcb.AbEntrySummary |= 1 << v18;
  else
    _InterlockedOr8((volatile signed __int8 *)&CurrentThread->Tcb.AbOrphanedEntrySummary, 1 << v18);
LABEL_31:
  --CurrentThread->Tcb.AbAllocationRegionCount;
  KiAbThreadRemoveBoosts(&CurrentThread->Tcb, (VOID *)p_CompressionLock, &a3);
  v14 = CurrentThread->Tcb.SpecialApcDisable++ == -1;
  if( v14
    && ($F25F8C4BA33AF922A5F1AF68CD89DDDF *)CurrentThread->Tcb.ApcState.ApcListHead[0].Flink != &CurrentThread->Tcb.152 )
  {
    KiCheckForKernelApcDelivery();
  }
}

Referenced by: