RtlpHpLfhBucketGetSubsegment

INT64 *__stdcall RtlpHpLfhBucketGetSubsegment(INT64 a1, INT64 a2){
  INT64 **v2; 
  int v3; 
  INT64 *v5; 
  UINT64 v7; 
  unsigned __int64 v8; 
  _ETHREAD *CurrentThread; 
  unsigned int SessionId; 
  unsigned __int8 v11; 
  int v12; 
  bool v13; 
  __int64 v14; 
  _KLOCK_ENTRY *v15; 
  __int64 v16; 
  UINT64 a3; 

  v2 = (INT64 **)(a1 + 24);
  v3 = a2;
  if( *v2 == (INT64 *)v2 )
    return 0i64;
  v7 = a1 + 16;
  v8 = RtlpHpAcquireLockExclusive((_EX_PUSH_LOCK *)(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((_EX_PUSH_LOCK *)v7);
    LODWORD(a3) = 0;
    CurrentThread = (_ETHREAD *)KeGetCurrentThread();
    if( MiGetSystemRegionType(v7) == 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 )
    {
      v13 = !_BitScanReverse((unsigned int *)&v14, v12);
      if( v13 )
        break;
      v15 = &CurrentThread->Tcb.LockEntries[v14];
      v12 &= ~(1 << v14);
      if( (v15->AcquiredByte & 1) != 0
        && (v15->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 1) == 0
        && (v15->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 & 0x7FFFFFFFFFFFFFFCi64) == (v7 & 0x7FFFFFFFFFFFFFFCi64)
        && v15->LockState.SessionId == SessionId )
      {
        v15->AcquiredByte &= ~1u;
        if( v15->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 )
        {
          if( v15 )
          {
            v15->CrossThreadReleasableAndBusyByte |= 2u;
            if( v15->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 < 0 )
              KiAbEntryRemoveFromTree(v15);
            LODWORD(a3) = v15->BoostBitmap.AllFields & 0x1FFFF;
            v15->BoostBitmap.AllFields &= 0xFFFE0000;
            v15->ThreadLocalFlags &= ~1u;
            v15->LockState.$E8276A2CF8B819ED32D1B6FEB35D730A::_bf_0 = 0i64;
            v16 = v15 - CurrentThread->Tcb.LockEntries;
            if( v11 == 1 )
              CurrentThread->Tcb.AbEntrySummary |= 1 << v16;
            else
              _InterlockedOr8((volatile signed __int8 *)&CurrentThread->Tcb.AbOrphanedEntrySummary, 1 << v16);
            goto LABEL_25;
          }
          break;
        }
      }
    }
    if( (*(&CurrentThread->Tcb.MiscFlags + 1) & 0x10000) == 0 )
      KeBugCheckEx(0x162u, CurrentThread, (PVOID)v7, (PVOID)SessionId, 0i64);
LABEL_25:
    --CurrentThread->Tcb.AbAllocationRegionCount;
    KiAbThreadRemoveBoosts(&CurrentThread->Tcb, (VOID *)v7, &a3);
    v13 = CurrentThread->Tcb.SpecialApcDisable++ == -1;
    if( v13
      && ($F25F8C4BA33AF922A5F1AF68CD89DDDF *)CurrentThread->Tcb.ApcState.ApcListHead[0].Flink != &CurrentThread->Tcb.152 )
    {
      KiCheckForKernelApcDelivery();
    }
    KiLeaveGuardedRegionUnsafe((__int64)KeGetCurrentThread());
  }
  return v5;
}

Referenced by: