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From: Luis Machado <luis.machado@arm.com>
To: Fabian Cenedese <Cenedese@indel.ch>, gdb@sourceware.org
Subject: Re: Internal error with gcc 4.7 elffile
Date: Tue, 8 Mar 2022 08:58:09 +0000	[thread overview]
Message-ID: <a63a39c1-40ca-df4d-4db5-052246988be9@arm.com> (raw)
In-Reply-To: <20220308075403.BD4194ACEF70@macserver.private>

Hi,

On 3/8/22 07:54, Fabian Cenedese wrote:
> Hello
>
> I'm currently working with a gdb 11.2.90.20220208, used for cross-compiled
> .elf files for PowerPC and ARM. There are no problems with elf files from
> gcc 7 or 10 or clang 12. However an elf file from a gcc 4.7 leads to an
> internal error in gdb. Somehow it can't detect the architecture. It should
> be PowerPC as readelf is able to confirm.
>
> ----------------------------
> Reading symbols from inos_testing.elf...
> ../../gdb/gdbarch.c:3576: internal-error: bool gdbarch_elf_make_msymbol_special_p(gdbarch*): Assertion `gdbarch != NULL' failed.
> A problem internal to GDB has been detected,
> further debugging may prove unreliable.
> Quit this debugging session?
> ----------------------------
>
> First I wanted to know if this should work at all or is gcc 4.7 too old to
> be supported by gdb 11? If it should still work, is this a known problem?
> I couldn't find bugs mentioning gdbarch.c
> The same elffile works perfectly fine with a gdb 7.6. A workaround seems
> to be to first start gdb, then set architecture before loading elffile.

Although gcc 4.7 is fairly old, it could be a bug or deficiency in GDB.
It might be the case that GDB is not finding what it is looking for,
thus ending up in an inconsistent state.

If you have a reproducer, it might be worth opening a bug ticket against
GDB so developers can take a look: https://sourceware.org/bugzilla/
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      reply	other threads:[~2022-03-08  8:58 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-03-08  7:54 Fabian Cenedese
2022-03-08  8:58 ` Luis Machado [this message]

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