CcApplyLowIoPriorityToThread

VOID __fastcall CcApplyLowIoPriorityToThread(INT64 Set, _SHARED_CACHE_MAP *SharedCacheMap){
  _DWORD *v2; 
  _ETHREAD *CurrentThread; 
  INT64 v4; 
  INT64 v6; 
  _ETHREAD *v7; 
  unsigned int SessionId; 
  char v9; 
  int v10; 
  bool v11; 
  __int64 v12; 
  unsigned __int64 v13; 
  int v14; 
  unsigned int v15; 
  __int64 v16; 
  int *v17; 
  KPRIORITY v18; 
  unsigned int v19; 
  char v20; 
  int v21; 
  __int64 v22; 
  unsigned __int64 v23; 
  int v24; 
  unsigned int v25; 
  __int64 v26; 
  int v27; 
  int v28; 
  CurrentThread = (_ETHREAD *)KeGetCurrentThread();
  v4 = (INT64)v2;
  if( !v2[1] )
    KeBugCheckEx(0x34u, 0x489ui64, 0xFFFFFFFFC0000420ui64, 0i64, 0i64);
  if( (_BYTE)SharedCacheMap )
  {
    if( *(_DWORD *)(Set + 960) >= *(_DWORD *)(Set + 200)
      || *(_QWORD *)(Set + 928)
      || v2[129]
      || (v2[38] & 0x10000) != 0 )
    {
      return;
    }
    v6 = Set + 952;
    ExAcquirePushLockExclusiveEx(Set + 952, 0i64);
    if( *(_DWORD *)(Set + 960) < *(_DWORD *)(Set + 200)
      && !*(_QWORD *)(Set + 928)
      && !*(_DWORD *)(v4 + 516)
      && (*(_DWORD *)(v4 + 152) & 0x10000) == 0 )
    {
      *(_QWORD *)(Set + 928) = CurrentThread;
      *(_QWORD *)(Set + 936) = v4;
      *(_DWORD *)(Set + 948) = PsSetIoPriorityThread((__int64)CurrentThread, 0);
    }
    if( (_InterlockedExchangeAdd64((volatile signed __int64 *)v6, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock((volatile INT64 *)v6);
    v7 = (_ETHREAD *)KeGetCurrentThread();
    v28 = 0;
    if( (unsigned int)MiGetSystemRegionType(v6) == 1 )
      SessionId = MmGetSessionIdEx(*((_QWORD *)v7 + 23));
    else
      SessionId = -1;
    --*((_WORD *)v7 + 243);
    v9 = ++*((_BYTE *)v7 + 794);
    v10 = (*((char *)v7 + 792) | *((char *)v7 + 870)) ^ 0x3F;
    while( 1 )
    {
      v11 = !_BitScanReverse((unsigned int *)&v12, v10);
      if( v11 )
        break;
      v13 = *((_QWORD *)v7 + 100) + 96 * v12;
      v10 &= ~(1 << v12);
      if( (*(_BYTE *)(v13 + 26) & 1) != 0
        && (*(_DWORD *)(v13 + 32) & 1) == 0
        && (*(_QWORD *)(v13 + 32) & 0x7FFFFFFFFFFFFFFCi64) == (v6 & 0x7FFFFFFFFFFFFFFCi64)
        && *(_DWORD *)(v13 + 40) == SessionId )
      {
        *(_BYTE *)(v13 + 26) &= ~1u;
        if( *(_QWORD *)(v13 + 32) )
        {
          if( v13 )
          {
            *(_BYTE *)(v13 + 32) |= 2u;
            if( *(__int64 *)(v13 + 32) < 0 )
              KiAbEntryRemoveFromTree(v13);
            v14 = *(_DWORD *)(v13 + 88) & 0x1FFFF;
            v15 = *(_DWORD *)(v13 + 88) & 0xFFFE0000;
            *(_BYTE *)(v13 + 25) &= ~1u;
            v28 = v14;
            *(_DWORD *)(v13 + 88) = v15;
            *(_QWORD *)(v13 + 32) = 0i64;
            v16 = (__int64)(v13 - *((_QWORD *)v7 + 100)) / 96;
            if( v9 == 1 )
              *((_BYTE *)v7 + 792) |= 1 << v16;
            else
              _InterlockedOr8((volatile signed __int8 *)v7 + 870, 1 << v16);
            goto LABEL_30;
          }
          break;
        }
      }
    }
    if( (*((_DWORD *)v7 + 30) & 0x10000) == 0 )
      KeBugCheckEx(0x162u, (ULONG_PTR)v7, v6, SessionId, 0i64);
LABEL_30:
    v17 = &v28;
  }
  else
  {
    if( *(_ETHREAD **)(Set + 928) != CurrentThread )
      return;
    v6 = Set + 952;
    ExAcquirePushLockExclusiveEx(Set + 952, 0i64);
    PsSetIoPriorityThread((__int64)CurrentThread, *(_DWORD *)(Set + 948));
    v18 = *(_DWORD *)(Set + 944);
    if( v18 != 32 )
      KeSetPriorityThread(KeGetCurrentThread(), v18);
    if( (*(_DWORD *)(v4 + 152) & 0x20000000) != 0 )
    {
      PsBoostThreadIoEx((__int64)CurrentThread, 1, 0, 0i64);
      CcUpdateSharedCacheMapFlag(v4, 0x20000000i64, 0);
    }
    *(_QWORD *)(Set + 928) = 0i64;
    *(_QWORD *)(Set + 936) = 0i64;
    *(_DWORD *)(Set + 948) = 5;
    *(_DWORD *)(Set + 944) = 32;
    if( (_InterlockedExchangeAdd64((volatile signed __int64 *)v6, 0xFFFFFFFFFFFFFFFFui64) & 6) == 2 )
      ExfTryToWakePushLock((volatile INT64 *)v6);
    v7 = (_ETHREAD *)KeGetCurrentThread();
    v27 = 0;
    if( (unsigned int)MiGetSystemRegionType(v6) == 1 )
      v19 = MmGetSessionIdEx(*((_QWORD *)v7 + 23));
    else
      v19 = -1;
    --*((_WORD *)v7 + 243);
    v20 = ++*((_BYTE *)v7 + 794);
    v21 = (*((char *)v7 + 792) | *((char *)v7 + 870)) ^ 0x3F;
    while( 1 )
    {
      v11 = !_BitScanReverse((unsigned int *)&v22, v21);
      if( v11 )
        break;
      v23 = *((_QWORD *)v7 + 100) + 96 * v22;
      v21 &= ~(1 << v22);
      if( (*(_BYTE *)(v23 + 26) & 1) != 0
        && (*(_DWORD *)(v23 + 32) & 1) == 0
        && (*(_QWORD *)(v23 + 32) & 0x7FFFFFFFFFFFFFFCi64) == (v6 & 0x7FFFFFFFFFFFFFFCi64)
        && *(_DWORD *)(v23 + 40) == v19 )
      {
        *(_BYTE *)(v23 + 26) &= ~1u;
        if( *(_QWORD *)(v23 + 32) )
        {
          if( v23 )
          {
            *(_BYTE *)(v23 + 32) |= 2u;
            if( *(__int64 *)(v23 + 32) < 0 )
              KiAbEntryRemoveFromTree(v23);
            v24 = *(_DWORD *)(v23 + 88) & 0x1FFFF;
            v25 = *(_DWORD *)(v23 + 88) & 0xFFFE0000;
            *(_BYTE *)(v23 + 25) &= ~1u;
            v27 = v24;
            *(_DWORD *)(v23 + 88) = v25;
            *(_QWORD *)(v23 + 32) = 0i64;
            v26 = (__int64)(v23 - *((_QWORD *)v7 + 100)) / 96;
            if( v20 == 1 )
              *((_BYTE *)v7 + 792) |= 1 << v26;
            else
              _InterlockedOr8((volatile signed __int8 *)v7 + 870, 1 << v26);
            goto LABEL_54;
          }
          break;
        }
      }
    }
    if( (*((_DWORD *)v7 + 30) & 0x10000) == 0 )
      KeBugCheckEx(0x162u, (ULONG_PTR)v7, v6, v19, 0i64);
LABEL_54:
    v17 = &v27;
  }
  --*((_BYTE *)v7 + 794);
  KiAbThreadRemoveBoosts((ULONG_PTR)v7, v6, (unsigned int *)v17);
  v11 = (*((_WORD *)v7 + 243))++ == 0xFFFF;
  if( v11 && *((_ETHREAD **)v7 + 19) != (_ETHREAD *)((char *)v7 + 152) )
    KiCheckForKernelApcDelivery();
}

Referenced by: