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<DIV><FONT size=2 face=Arial>Utilities pointersTo: object</FONT></DIV><FONT
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<DIV style="font-color: black"><B>From:</B> <A
title="mailto:marianopeck@gmail.com CTRL + Click to follow link"
href="mailto:marianopeck@gmail.com">Mariano Martinez Peck</A> </DIV>
<DIV><B>Sent:</B> Thursday, July 15, 2010 8:40 AM</DIV>
<DIV><B>To:</B> <A
title="mailto:vm-dev@lists.squeakfoundation.org CTRL + Click to follow link"
href="mailto:vm-dev@lists.squeakfoundation.org">Squeak Development Discussion
Virtual Machine</A> </DIV>
<DIV><B>Subject:</B> [Vm-dev] Detecting objects that point to an
object</DIV></DIV></DIV>
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<P></P>Hi folks. I need to know the objects (actually, only how many) that are
pointing to any object. So...I take an object X, and I want to know how many
objects are pointing to X. <BR><BR>The only possible I see in Squeak VM is to do
a full mark over all objects in memory (or starting by the roots). This is time
consuming and I even need (maybe) to do this check (to know how many objects are
pointing to an object) for every single object.<BR><BR>So...is there a faster
solution for this? The only thing I can imagine is to modify the object header,
maybe create a new type, and add an array with the addresses of the objects that
are pointing to that object. Or maybe just a counter that I can increase or
decrease ?<BR><BR>Thanks for any tip. <BR><BR>Mariano<BR></BODY></HTML>