GNU bug report logs - #79360
30.2; lldb shows incorrect code location when no column number is available

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Message #8 received at 79360 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Gustav Hållberg <gustav <at> gmail.com>
Cc: 79360 <at> debbugs.gnu.org
Subject: Re: bug#79360: 30.2;
 lldb shows incorrect code location when no column number is available
Date: Mon, 01 Sep 2025 18:52:26 +0300

> From: Gustav Hållberg <gustav <at> gmail.com>
> Date: Mon, 1 Sep 2025 16:42:33 +0200
> 
> In (lldb), there is a bug that positions the source code location on the last character of the previous line if
> lldb doesn't report a column number.
> 
> Example, save the following as "t.s" and compile (on x86-64) with "gcc -g t.s -o t":
> 
>         .global _main
> _main:
>         xor %eax,%eax
>         ret
> 
> and debug using (lldb "lldb ./t"):
> 
> (lldb) b main
>   :
> (lldb) run
>   :
> (lldb) disas
> t`main:
>     0x555555555129 <+0>: xorl   %eax, %eax
> ->  0x55555555512b <+2>: retq
> 
> but the source code location ends up at the last character of the "xor %eax..." line.
> 
> Attaching proposed pach against 66ef930ebea4618c1dac71a09495766476ced1d6.

Thanks, but if this is a bug in lldb, why shouldn't it be solved in
lldb, not in Emacs?

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