/// <summary>
/// based on <a href="https://github.com/dotnet/coreclr/blob/master/src/gcdump/i386/gcdumpx86.cpp">GCDump::DumpGCTable</a>
/// </summary>
private void DecodeUntracked(byte[] image, InfoHdrSmall header, ref int offset)
{
uint calleeSavedRegs = 0;
if (header.DoubleAlign)
{
calleeSavedRegs = 0;
if (header.EdiSaved)
{
calleeSavedRegs++;
}
if (header.EsiSaved)
{
calleeSavedRegs++;
}
if (header.EbxSaved)
{
calleeSavedRegs++;
}
}
uint count = header.UntrackedCnt;
int lastStkOffs = 0;
while (count-- > 0)
{
int stkOffsDelta;
int lowBits;
char reg = header.EbpFrame ? 'B' : 'S';
stkOffsDelta = NativeReader.DecodeSignedGc(image, ref offset);
int stkOffs = lastStkOffs - stkOffsDelta;
lastStkOffs = stkOffs;
lowBits = (int)OFFSET_MASK & stkOffs;
stkOffs = (int)((uint)stkOffs & ~OFFSET_MASK);
if (header.DoubleAlign &&
(uint)stkOffs >= sizeof(int) * (header.FrameSize + calleeSavedRegs))
{
reg = 'B';
stkOffs -= sizeof(int) * (int)(header.FrameSize + calleeSavedRegs);
}
GcSlots.Add(new GcSlot(GcSlots.Count, $"E{reg}P", stkOffs, lowBits, GcSlotFlags.GC_SLOT_UNTRACKED));
}
}
