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From: "tsqurt at outlook dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libcc1/113977] debug info for alignment of structure is unspecified
Date: Sun, 18 Feb 2024 02:41:15 +0000 [thread overview]
Message-ID: <bug-113977-4-jf1XJ56yaW@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-113977-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113977
--- Comment #4 from Tan Senqi <tsqurt at outlook dot com> ---
(In reply to Andrew Pinski from comment #3)
> For me with the trunk GCC we get:
> ```
> (gdb) expr z[0]._[0] = 1
> gdb command line:1:1: error: size of array element is not a multiple of its
> alignment
> Compilation failed.
> (gdb) expr y[0]._[0] = 1
> (gdb) expr x[0]._[0] = 1
> gdb command line:1:1: error: alignment of array elements is greater than
> element size
> Compilation failed.
>
> ```
>
> I am starting to think this is a gdb issue ...
I think gcc can generate a DW_AT_alignment for my struct to solve this problem.
But why the alignment is considered as 8, I am not sure about this. If it is
inherited from the default structure alignment requirement on the platform,
then gcc should specify alignment for those whose alignment is not 8. Or 8 is
not the default value by DWARF5(i.e. undefined), then it is surely a bug in
gdb.
next prev parent reply other threads:[~2024-02-18 2:41 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-18 2:06 [Bug debug/113977] New: " tsqurt at outlook dot com
2024-02-18 2:29 ` [Bug debug/113977] " pinskia at gcc dot gnu.org
2024-02-18 2:32 ` [Bug libcc1/113977] " pinskia at gcc dot gnu.org
2024-02-18 2:35 ` pinskia at gcc dot gnu.org
2024-02-18 2:41 ` tsqurt at outlook dot com [this message]
2024-02-18 2:47 ` pinskia at gcc dot gnu.org
2024-02-18 2:48 ` pinskia at gcc dot gnu.org
2024-02-18 2:58 ` pinskia at gcc dot gnu.org
2024-02-18 3:06 ` pinskia at gcc dot gnu.org
2024-02-20 18:27 ` tromey at gcc dot gnu.org
2024-02-20 18:32 ` pinskia at gcc dot gnu.org
2024-02-22 1:46 ` tromey at gcc dot gnu.org
2024-02-29 16:08 ` cvs-commit at gcc dot gnu.org
2024-02-29 16:34 ` tromey at gcc dot gnu.org
2024-03-07 8:20 ` pinskia at gcc dot gnu.org
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