<div dir="ltr">I will try to take a look at it some time this week.<div><br></div><div>David</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Apr 18, 2016 at 8:12 PM, Igor Kudrin <span dir="ltr"><<a href="mailto:ikudrin.dev@gmail.com" target="_blank">ikudrin.dev@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi David, Vedant,<br>
<br>
It looks like we might have UB somewhere connected with reading coverage mapping serialized in v2 format (with compressed function names).<br>
<br>
I committed my patch, r266436, using the current format for .covmapping file, and then buildbots complained about it:<br>
* <a href="http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/11935/steps/check-llvm%20ubsan/logs/stdio" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/11935/steps/check-llvm%20ubsan/logs/stdio</a><br>
* <a href="http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/builds/11460/steps/check-llvm%20ubsan/logs/stdio" rel="noreferrer" target="_blank">http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap/builds/11460/steps/check-llvm%20ubsan/logs/stdio</a><br>
<br>
I tried to reproduce the issue locally, but didn't succeed. Anyway, I've reapplied my patch (r266620) using the old format<br>
for .covmapping, and buildbots are happy now.<br>
<br>
Could you take a look on that? Do you have any idea what might cause the problem?<br>
<br>
Best regards,<br>
Igor Kudrin<br>
</blockquote></div><br></div>