<div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jan 7, 2015 at 11:36 AM, Renato Golin <span dir="ltr"><<a href="mailto:renato.golin@linaro.org" target="_blank">renato.golin@linaro.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">On 7 January 2015 at 18:19, Kostya Serebryany <<a href="mailto:kcc@google.com">kcc@google.com</a>> wrote:<br>
> Can you give more info (exact report, gdb trace, etc)<br>
<br>
</span>It's not that simple, as the actual failure is down the service<br>
routine, which only triggers way down the execution line, so stepping<br>
through it is not trivial. One would have to know what to expect (ie.<br>
know the UBsan code, setthe right breakpoints) and step through on<br>
AArch64 directly. Unfortunately, I can't give you access to that<br>
machine. :(<br>
<span class=""><br></span></blockquote><div><br></div><div>Can you at least grab a backtrace on the trap instruction? (or is there weird stack stuff going on?)</div><div><br></div><div>-- Sean Silva</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span class="">
<br>
> We never tried, but there is very little platform dependent code in UBSan.<br>
<br>
</span>Maybe I should disable it. the thing is that I want to get a baseline,<br>
where we can start from a green bot. Marking as XFAIL is one way to<br>
document that "this should pass", instead of UNSUPPORTED, which<br>
shouldn't. Since it's already marked as XFAIL for ARM, I'm guessing<br>
one fix should help both archs.<br>
<div class="HOEnZb"><div class="h5"><br>
cheers,<br>
--renato<br>
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