MiCanFileBeTruncatedInternal

_CONTROL_AREA *__stdcall MiCanFileBeTruncatedInternal(
        _MI_SECTION_OBJECT_POINTERS *SectionPointer,
        _LARGE_INTEGER *NewFileSize,
        UINT64 BlockNewViews,
        UINT64 CanPurgeUserViews,
        UINT8 *EntryIrql){
  int v5; 
  bool v8; 
  unsigned __int64 v9; 
  __int64 v10; 
  _SUBSECTION *LastSubsection; 
  _SUBSECTION *i; 
  unsigned __int64 v14; 
  INT64 *v15; 
  char v16; 
  unsigned __int64 v17; 
  int v18; 

  v18 = BlockNewViews;
  v5 = CanPurgeUserViews;
  while( 1 )
  {
    v8 = *((_QWORD *)SectionPointer + 2) == 0i64;
    *EntryIrql = 17;
    if( v8 )
    {
      v9 = (unsigned __int8)ExAcquireSpinLockExclusive(&SpinLock);
      if( !*((_QWORD *)SectionPointer + 2) )
        goto LABEL_4;
      ExReleaseSpinLockExclusiveFromDpcLevel(&SpinLock);
      __writecr8(v9);
    }
    MmFlushImageSection((_SECTION_OBJECT_POINTERS *)SectionPointer, MmFlushForWrite);
    if( !v16 )
      return 0i64;
    LOBYTE(v9) = ExAcquireSpinLockExclusive(&SpinLock);
LABEL_4:
    v10 = *(_QWORD *)SectionPointer;
    if( !*(_QWORD *)SectionPointer )
    {
      ExReleaseSpinLockExclusiveFromDpcLevel(&SpinLock);
      __writecr8((unsigned __int8)v9);
      *EntryIrql = 0;
      return 0i64;
    }
    if( (unsigned int)ExTryAcquireSpinLockExclusiveAtDpcLevel((INT64 *)(v10 + 72)) )
      break;
    ExReleaseSpinLockExclusiveFromDpcLevel(&SpinLock);
    __writecr8((unsigned __int8)v9);
  }
  ExReleaseSpinLockExclusiveFromDpcLevel(&SpinLock);
  if( *(_DWORD *)(v10 + 56) & 1 | ((*(_DWORD *)(v10 + 56) & 2) != 0)
    || *(_QWORD *)(v10 + 112) > 1ui64 && (*(_DWORD *)(v10 + 56) & 8) == 0 && !v5 )
  {
    goto LABEL_21;
  }
  if( !*(_QWORD *)(v10 + 48) || v18 == 1 && (!*(_QWORD *)(v10 + 40) || v5 == 1) )
    goto LABEL_11;
  if( !NewFileSize )
  {
LABEL_21:
    v15 = (INT64 *)(v10 + 72);
LABEL_20:
    ExReleaseSpinLockExclusiveFromDpcLevel(v15);
    __writecr8((unsigned __int8)v9);
    return 0i64;
  }
  LastSubsection = (_SUBSECTION *)(v10 + 128);
  if( *(_QWORD *)(v10 + 64) )
    LastSubsection = MiFindLastSubsection((_CONTROL_AREA *)v10, 1ui64);
  for( i = LastSubsection->NextSubsection; i; i = i->NextSubsection )
    LastSubsection = i;
  MiEndingOffset(LastSubsection);
  if( NewFileSize->QuadPart < v14 )
  {
    v15 = (INT64 *)(v10 + 72);
    goto LABEL_20;
  }
  v17 = (v14 + 4095) & 0xFFFFFFFFFFFFF000ui64;
  if( NewFileSize->QuadPart < v17 )
    NewFileSize->QuadPart = v17;
LABEL_11:
  *EntryIrql = v9;
  return(_CONTROL_AREA *)v10;
}

Referenced by: