From: Luis Machado <lgustavo@codesourcery.com>
To: Pedro Alves <palves@redhat.com>, <gdb-patches@sourceware.org>
Cc: <simon.marchi@polymtl.ca>
Subject: Re: [PATCH,v2] Make language setting tests more robust
Date: Mon, 06 Feb 2017 18:04:00 -0000 [thread overview]
Message-ID: <932c60a6-c132-2a93-22f2-c909edc18bc0@codesourcery.com> (raw)
In-Reply-To: <693288e6-921d-7ff2-e81f-4aa8ccdd75a3@redhat.com>
On 02/06/2017 10:50 AM, Pedro Alves wrote:
> On 02/06/2017 02:54 PM, Luis Machado wrote:
>>
>> The story here is that i noticed 3 tests with such a problem:
>>
>> FAIL: gdb.compile/compile-ifunc.exp: nodebug: set language c
>> FAIL: gdb.dwarf2/data-loc.exp: set language ada
>> FAIL: gdb.dwarf2/dynarr-ptr.exp: set language ada
>>
>> And my build had a glibc with debugging symbols and sources, therefore
>> GDB had set the initial language to asm before main.
>
> There's a comment about that in gdb.compile/compile-ifunc.exp:
>
> # This binary has no debug information, so force the language to C in case
> # GDB happened to see real asm code when it stopped at the entry point
> # when talking to a remote target, like gdbserver. This guarantees the
> # feature check below will work.
> gdb_test_no_output "set language c" ""
>
> So the question is, why did the gdb_test_no_output work back then,
> and doesn't now?
>
I can't confirm it worked before since i haven't looked at this
particular setup then.
> In top.c:check_frame_language_change()
> [...]
> if (has_stack_frames ())
> {
> enum language flang;
>
> flang = get_frame_language (frame);
> if (!warned
> && flang != language_unknown
> && flang != current_language->la_language)
> {
> printf_filtered ("%s\n", lang_frame_mismatch_warn);
> warned = 1;
> }
>
> what does get_frame_language return? Isn't it returning
> language_unknown for you? Why not?
>
That returns language_asm for me. Supposedly because gdb has seen asm
from glibc and then sticked with it when it reached the test program's
main. And the program has no debug info.
>> FAIL: gdb.dwarf2/data-loc.exp: set language ada
>> FAIL: gdb.dwarf2/dynarr-ptr.exp: set language ada
Same as above, language_asm.
Maybe gdb should've switched to language_unknown when it reached main
for this/these particular cases?
The logic to complain about a mismatch of language between the frame and
the user selection seems sane.
next prev parent reply other threads:[~2017-02-06 18:04 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-01 15:17 [PATCH] " Luis Machado
2017-02-01 18:38 ` Simon Marchi
2017-02-01 19:22 ` Luis Machado
2017-02-01 19:25 ` Simon Marchi
2017-02-01 21:50 ` Keith Seitz
2017-02-01 23:29 ` Luis Machado
2017-02-02 1:24 ` Simon Marchi
2017-02-01 20:21 ` [PATCH,v2] " Luis Machado
2017-02-02 1:33 ` Simon Marchi
2017-02-03 0:37 ` Pedro Alves
2017-02-06 14:54 ` Luis Machado
2017-02-06 15:09 ` Luis Machado
2017-02-06 16:51 ` Pedro Alves
2017-02-06 18:04 ` Luis Machado [this message]
2017-02-06 18:08 ` Pedro Alves
2017-02-06 18:22 ` Luis Machado
2017-02-06 18:24 ` Pedro Alves
2017-02-06 19:56 ` Luis Machado
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