EtwpCoverageSamplerContextSwap

void __fastcall EtwpCoverageSamplerContextSwap(__int64 a1){
  __int64 v1; 
  unsigned int v2; 
  unsigned int v3; 
  __int64 v4; 
  unsigned int LowPart; 
  int v6; 
  int v7; 
  int v8; 
  unsigned int v9; 
  unsigned int v10; 
  unsigned int v11; 
  int v12; 
  int v13; 
  if( a1 && a1 != *(_QWORD *)StartContext && a1 != *((_QWORD *)KeGetCurrentPrcb() + 3) )
  {
    v1 = (*(_QWORD *)(StartContext + 8) >> 4) & 0x1FFi64;
    v2 = ((unsigned int)*(_QWORD *)(StartContext + 8) >> 13) & 0x3FFFF;
    _BitScanReverse(&v3, v2);
    v4 = *(_QWORD *)(*(_QWORD *)(*((_QWORD *)KeGetCurrentPrcb() + 4198) + 8i64 * (v3 - 2)) + 8i64 * (v2 ^ (1 << v3)) + 8);
    if( !*(_DWORD *)(v4 + 8 * v1 + 184) )
    {
LABEL_14:
      _InterlockedIncrement((volatile signed __int32 *)(v4 + 8 * v1 + 324));
      EtwpCovSampCaptureSample(0i64, 0x50000004ui64);
      return;
    }
    LowPart = KUSER_SHARED_DATA.TickCount.LowPart;
    if( KUSER_SHARED_DATA.TickCount.LowPart - *(_DWORD *)(v4 + 8 * v1 + 188) > *(_DWORD *)(v4 + 8 * v1 + 192) )
    {
      v6 = *(_DWORD *)(v4 + 8 * v1 + 184);
      *(_DWORD *)(v4 + 8 * v1 + 204) += v6;
      v7 = *(_DWORD *)(v4 + 8 * v1 + 204);
      v8 = *(_DWORD *)(v4 + 8 * v1 + 212);
      if( v7 > *(_DWORD *)(v4 + 8 * v1 + 196) )
        v7 = *(_DWORD *)(v4 + 8 * v1 + 196);
      *(_DWORD *)(v4 + 8 * v1 + 188) = LowPart;
      v9 = *(_DWORD *)(v4 + 8 * v1 + 200) + v8;
      *(_DWORD *)(v4 + 8 * v1 + 200) = 0;
      v10 = v9 >> 1;
      *(_DWORD *)(v4 + 8 * v1 + 204) = v7;
      *(_DWORD *)(v4 + 8 * v1 + 212) = v10;
      if( v10 >= 2 * v6 )
      {
        v11 = v10 / (v6 + 1);
        v12 = LowPart ^ *(_DWORD *)(v4 + 8 * v1 + 220);
        *(_DWORD *)(v4 + 8 * v1 + 216) = v11;
        *(_DWORD *)(v4 + 8 * v1 + 220) = 16777619 * v12;
        *(_DWORD *)(v4 + 8 * v1 + 208) = (16777619 * v12) & (2 * v11);
      }
      else
      {
        *(_DWORD *)(v4 + 8 * v1 + 216) = 1;
        *(_DWORD *)(v4 + 8 * v1 + 208) = 1;
      }
    }
    ++*(_DWORD *)(v4 + 8 * v1 + 200);
    v13 = *(_DWORD *)(v4 + 8 * v1 + 204);
    if( v13 > 0 && (int)--*(_DWORD *)(v4 + 8 * v1 + 208) <= 0 )
    {
      *(_DWORD *)(v4 + 8 * v1 + 204) = v13 - 1;
      *(_DWORD *)(v4 + 8 * v1 + 208) = *(_DWORD *)(v4 + 8 * v1 + 216);
      goto LABEL_14;
    }
  }
}

Referenced by: