<div dir="ltr"><div>Can you elaborate a bit? I don't understand what you mean.</div><div><br></div><div>Removing kindLayoutBefore will affect dead stripping because it would lost back references for kindLayoutAfter, so it would collect live atoms.</div>
<div><br></div>I'm not removing kindLayoutBefore in this patch. This patch is just to stop using kindLayoutBefore in the layout pass. The dead stripping pass is still using it. Removing kindLayoutBefore entirety is the last step, after modifying the dead stripping pass so that the pass works without kindLayoutBefore (only with kindLayoutAfter and kindInGroup).<br>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Thu, Mar 27, 2014 at 12:45 PM, Shankar Easwaran <span dir="ltr"><<a href="mailto:shankare@codeaurora.org" target="_blank">shankare@codeaurora.org</a>></span> wrote:<br>
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<div>On 3/27/2014 2:33 PM, Rui Ueyama wrote:<br>
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<div style="font-family:arial,sans-serif;font-size:13px">(I
accidentally hit "reply" instead of "reply all", so sending it
again.)</div>
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<div style="font-family:arial,sans-serif;font-size:13px">I'll
add "alias" references if no objections from other reviewers.
I'll probably add ELF symbol aliasing support with it, so hold
on.</div>
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<div style="font-family:arial,sans-serif;font-size:13px">We
cannot remove kindLayoutBefore because doing it would break
dead stripping pass. We still need it for GC as GC needs
backward references.</div>
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<div style="font-family:arial,sans-serif;font-size:13px">To
remove kindLayoutBefore, we have to modify dead striping pass
so that it creates back references internally from forward
references and use it while collecting dead objects. I think
I'm going to make such change, but it's going a bit large.</div>
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<div style="font-family:arial,sans-serif;font-size:13px">Submitting
this change first and then doing the next step in a following
patch would be better than merging the two together.
Incremental change is easier to bisect in case it would breaks
omething, and it's easy to understand for reviewers, too.</div>
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<div class="gmail_extra"><br>
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Do we have a flag to garbage collect atoms with lld in the current
implementation ? If not removing kindLayoutBefore wouldnot affect
anything right ?<br>
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Shankar Easwaran<br>
<br>
<pre cols="72">--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by the Linux Foundation</pre>
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