GNU bug report logs - #29183
27.0.50; SIGSEGV on C-g on Windows

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Message #44 received at 29183 <at> debbugs.gnu.org (full text, mbox):

From: John Mastro <john.b.mastro <at> gmail.com>
To: Paul Eggert <eggert <at> cs.ucla.edu>, Eli Zaretskii <eliz <at> gnu.org>
Cc: 29183 <at> debbugs.gnu.org
Subject: Re: bug#29183: 27.0.50; SIGSEGV on C-g on Windows
Date: Thu, 9 Nov 2017 09:59:00 -0800

Paul Eggert <eggert <at> cs.ucla.edu> wrote:
> John Mastro wrote:
>>
>> the only line in the diff between the two resulting
>> files that mentions main_thread is that the output from the source with
>> GCALIGNED says:
>>
>>      .lcomm main_thread,592,8
>>
>> Whereas the assembly output from the source without GCALIGNED says:
>>
>>      .lcomm main_thread,592,32
>
>
> Thanks, this helped me see the problem. It turns out that 'struct foo
> __attribute__ ((aligned (8)))' does not work with GCC, and that one must put
> the attribute somewhere else. This appears to be a bug in GCC, and I
> reported the GCC bug here:
>
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82914
>
> The workaround is easy: say 'struct __attribute__ ((aligned (8))) foo'
> instead. I installed the attached patch into the emacs-26 branch and merged
> it into master. Please give it a try.

I can confirm that fixed it. Thank you both!

        John

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