public bool CreateForwardReferences(ClrHeap heap, out string error)
{
const string progressHeader = Constants.HeavyAsteriskHeader + "[FwdRefs] ";
error = null;
int nullCount = 0;
BinaryWriter bwFwdRefs = null, bwFwdOffs = null;
_reflagSet = new BitSet(_instances.Length);
//_reflagSet = new HashSet<int>();
try
{
_stopWatch = new Stopwatch();
_stopWatch.Start();
_progress?.Report(progressHeader + "Creating forward references data...");
_reversedRefsCounts = new int[_instances.Length];
_forwardRefsCounts = new int[_instances.Length];
int lastInstanceNdx = _instances.Length - 1; // for binary search
bwFwdRefs = GetWriter(RefFile.FwdRefs, FileMode.Create);
bwFwdOffs = GetWriter(RefFile.FwdOffsets, FileMode.Create);
long offset = 0L;
var fieldAddrOffsetList = new List <ulong>(64);
for (int i = 0, icnt = _instances.Length; i < icnt; ++i)
{
var addr = Utils.RealAddress(_instances[i]);
var clrType = heap.GetObjectType(addr);
//Debug.Assert(clrType != null); // TODO JRD restore this
bwFwdOffs.Write(offset);
if (clrType == null)
{
++nullCount; continue;
}
if (TypeExtractor.IsExludedType(clrType.Name))
{
continue;
}
fieldAddrOffsetList.Clear();
clrType.EnumerateRefsOfObjectCarefully(addr, (address, off) =>
{
fieldAddrOffsetList.Add(address);
});
if (fieldAddrOffsetList.Count < 1)
{
continue;
}
int acount = PreprocessParentRefs(addr, fieldAddrOffsetList);
if (acount == 0)
{
continue;
}
offset += acount * sizeof(int);
_forwardRefsCounts[i] += acount;
int parentNdx = Utils.AddressSearch(_instances, addr);
Debug.Assert(parentNdx >= 0);
for (int j = 0; j < acount; ++j)
{
ulong childAddr = fieldAddrOffsetList[j];
int childNdx = Utils.AddressSearch(_instances, childAddr);
Debug.Assert(childNdx >= 0);
if (copy_addr_flags_check(_instances, parentNdx, childNdx))
{
_reflagSet.Set(childNdx);
//_reflagSet.Add(childNdx);
}
_reversedRefsCounts[childNdx] += 1; // update reversed references count
++_totalReversedRefs;
bwFwdRefs.Write(childNdx);
}
}
bwFwdOffs.Write(offset);
_progress?.Report(progressHeader + "Creating forward references data done. " + Utils.StopAndGetDurationStringAndRestart(_stopWatch));
_progress?.Report(progressHeader + "UNEXPECTED NULLS, count: " + nullCount);
return(true);
}
catch (Exception ex)
{
error = Utils.GetExceptionErrorString(ex);
_progress?.Report(progressHeader + "EXCEPTION: " + ex.Message);
return(false);
}
finally
{
bwFwdRefs?.Close();
bwFwdOffs?.Close();
}
}