RtlpHpLfhBucketGetSubsegment

INT64 *__fastcall RtlpHpLfhBucketGetSubsegment(INT64 a1, INT64 a2){
  INT64 **v2; 
  int v3; 
  INT64 *v5; 
  INT64 v7; 
  unsigned __int64 v8; 
  _ETHREAD *CurrentThread; 
  unsigned int SessionId; 
  char v11; 
  int v12; 
  bool v13; 
  __int64 v14; 
  unsigned __int64 v15; 
  __int64 v16; 
  int v17; 
  v2 = (INT64 **)(a1 + 24);
  v3 = a2;
  if( *v2 == (INT64 *)v2 )
    return 0i64;
  v7 = a1 + 16;
  v8 = RtlpHpAcquireLockExclusive((INT64 *)(a1 + 16), a2);
  if( *v2 == (INT64 *)v2 )
    v5 = 0i64;
  else
    v5 = RtlpHpLfhOwnerMoveSubsegment(a1, *v2, 2i64);
  if( v3 )
  {
    ExReleaseSpinLockExclusiveFromDpcLevel((INT64 *)v7);
    __writecr8(v8);
  }
  else
  {
    if( (_InterlockedExchangeAdd64((volatile signed __int64 *)v7, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock((volatile INT64 *)v7);
    v17 = 0;
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    if( (unsigned int)MiGetSystemRegionType(v7) == 1 )
      SessionId = MmGetSessionIdEx(*((_QWORD *)CurrentThread + 23));
    else
      SessionId = -1;
    --*((_WORD *)CurrentThread + 243);
    v11 = ++*((_BYTE *)CurrentThread + 794);
    v12 = (*((char *)CurrentThread + 792) | *((char *)CurrentThread + 870)) ^ 0x3F;
    while( 1 )
    {
      v13 = !_BitScanReverse((unsigned int *)&v14, v12);
      if( v13 )
        break;
      v15 = *((_QWORD *)CurrentThread + 100) + 96 * v14;
      v12 &= ~(1 << v14);
      if( (*(_BYTE *)(v15 + 26) & 1) != 0
        && (*(_DWORD *)(v15 + 32) & 1) == 0
        && (*(_QWORD *)(v15 + 32) & 0x7FFFFFFFFFFFFFFCi64) == (v7 & 0x7FFFFFFFFFFFFFFCi64)
        && *(_DWORD *)(v15 + 40) == SessionId )
      {
        *(_BYTE *)(v15 + 26) &= ~1u;
        if( *(_QWORD *)(v15 + 32) )
        {
          if( v15 )
          {
            *(_BYTE *)(v15 + 32) |= 2u;
            if( *(__int64 *)(v15 + 32) < 0 )
              KiAbEntryRemoveFromTree(v15);
            v17 = *(_DWORD *)(v15 + 88) & 0x1FFFF;
            *(_DWORD *)(v15 + 88) &= 0xFFFE0000;
            *(_BYTE *)(v15 + 25) &= ~1u;
            *(_QWORD *)(v15 + 32) = 0i64;
            v16 = (__int64)(v15 - *((_QWORD *)CurrentThread + 100)) / 96;
            if( v11 == 1 )
              *((_BYTE *)CurrentThread + 792) |= 1 << v16;
            else
              _InterlockedOr8((volatile signed __int8 *)CurrentThread + 870, 1 << v16);
            goto LABEL_25;
          }
          break;
        }
      }
    }
    if( (*((_DWORD *)CurrentThread + 30) & 0x10000) == 0 )
      KeBugCheckEx(0x162u, (ULONG_PTR)CurrentThread, v7, SessionId, 0i64);
LABEL_25:
    --*((_BYTE *)CurrentThread + 794);
    KiAbThreadRemoveBoosts((ULONG_PTR)CurrentThread, v7, (unsigned int *)&v17);
    v13 = (*((_WORD *)CurrentThread + 243))++ == 0xFFFF;
    if( v13 && *((_ETHREAD **)CurrentThread + 19) != (_ETHREAD *)((char *)CurrentThread + 152) )
      KiCheckForKernelApcDelivery();
    KiLeaveGuardedRegionUnsafe((__int64)KeGetCurrentThread());
  }
  return v5;
}

Referenced by: