From: Luis Machado <lgustavo@codesourcery.com>
To: Pedro Alves <palves@redhat.com>, <gdb-patches@sourceware.org>
Subject: Re: [PATCH] Fix problems with finishing a dummy function call on simulators.
Date: Tue, 09 Jun 2015 18:34:00 -0000 [thread overview]
Message-ID: <557731C2.9020108@codesourcery.com> (raw)
In-Reply-To: <55772CD8.9070106@redhat.com>
On 06/09/2015 03:13 PM, Pedro Alves wrote:
> On 06/09/2015 07:10 PM, Luis Machado wrote:
>
>>> Not exactly sure what to do here. Maybe we should stop considering
>>> permanent and non-permanent breakpoints at the same address as
>>> duplicates. That should result in GDB inserting the non-permanent
>>> one, I think. Or we could get stop marking permanent breakpoints
>>> as always inserted, and let normal breakpoints insert on top of
>>> permanent breakpoints normally. See also:
>>> https://sourceware.org/ml/gdb-patches/2015-03/msg00174.html
>>
>> That sounds a bit hacky.
>
> Can you clarify? There are two suggestions above, in addition
> to a url showing even more ideas. So I don't know what you're
> referring to. :-)
>
> Thanks,
> Pedro Alves
>
>> Doesn't that defeat the purpose of having
>> permanent breakpoints in the first place?
>>
>> It looks like non-gdbserver targets are not ready to support these
>> tricky constructs/optimizations unfortunately. I'm afraid adding more
>> hacks here and there will cause the code to get even more confusing
>> without a generous amount of code comments. And i'm not even sure the
>> bp_finish check is the best solution either. After all, there is the
>> stepi case too.
>>
>> We could probably fix the simulators, but then again there are
>> proprietary ones we cannot easily fix.
>
>
For the record, i'm fine with any of those workarounds if there is no
reasonable fix for the fact that permanent breakpoints don't work as GDB
expects on some targets. :-)
next prev parent reply other threads:[~2015-06-09 18:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-09 15:01 Luis Machado
2015-06-09 17:51 ` Pedro Alves
2015-06-09 18:10 ` Luis Machado
2015-06-09 18:13 ` Pedro Alves
2015-06-09 18:22 ` Luis Machado
2015-06-09 18:34 ` Luis Machado [this message]
2015-06-16 17:39 ` Luis Machado
2015-06-17 12:41 ` Pedro Alves
2015-06-17 13:26 ` Luis Machado
2015-06-17 13:43 ` Pedro Alves
2015-06-17 20:16 ` Luis Machado
2015-07-06 15:06 ` Pedro Alves
2015-07-06 15:33 ` Luis Machado
2015-07-06 16:15 ` Pedro Alves
2015-07-06 16:18 ` Luis Machado
2015-07-06 18:34 ` Luis Machado
2015-07-06 19:07 ` Pedro Alves
2015-07-06 19:11 ` Luis Machado
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