From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: Pedro Alves <alves.ped@gmail.com>
Cc: gdb-patches@sourceware.org
Subject: Re: [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7
Date: Mon, 02 Jan 2012 14:53:00 -0000 [thread overview]
Message-ID: <20120102145255.GA20385@host2.jankratochvil.net> (raw)
In-Reply-To: <4F01C2B2.7010808@gmail.com>
On Mon, 02 Jan 2012 15:44:02 +0100, Pedro Alves wrote:
> I see. That '_Unwind_IsSignalFrame(context)' is there to cancel out
> the '- 1' for signal frames. Ideally, the same treatment would be
> applied for gdb's dummy frame, perhaps by having gdb itself change
> `context->flags' making libunwind treat it as a signal frame. I
> have no idea whether that's feasible. Oh well.
It needs to be universal, at least for both libgcc and libunwind, via the
_Unwind_* API.
And this signal frame indication (such as 'S' in .eh_frame CIE augmentation)
would need to be present in the frame for the called code. The caller frame
<function called from gdb> is already too late, that one gets already wrongly
unwound.
I do not find it feasible myself.
Thanks,
Jan
prev parent reply other threads:[~2012-01-02 14:53 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-12-22 20:49 Jan Kratochvil
2011-12-27 6:23 ` Joel Brobecker
2011-12-28 16:30 ` Jan Kratochvil
2011-12-28 18:47 ` [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 #2 Jan Kratochvil
2011-12-28 20:40 ` Mark Kettenis
2011-12-30 2:45 ` [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 #3 Jan Kratochvil
2011-12-30 8:46 ` Joel Brobecker
2011-12-30 11:11 ` Mark Kettenis
2011-12-30 14:16 ` Jan Kratochvil
2011-12-31 2:56 ` Peter Schauer
2011-12-30 11:25 ` Jan Kratochvil
2012-01-01 22:22 ` Jan Kratochvil
2012-01-02 2:45 ` Joel Brobecker
2012-01-02 2:58 ` Jan Kratochvil
2012-01-03 14:45 ` Regression on PowerPC (Re: [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 #3) Ulrich Weigand
2012-01-03 15:52 ` Joel Brobecker
2012-01-04 14:01 ` [revert] " Jan Kratochvil
2012-01-04 14:09 ` Joel Brobecker
2012-03-08 23:24 ` [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 #4 [Re: [revert] Regression on PowerPC] Jan Kratochvil
2012-03-09 7:22 ` cancel: " Jan Kratochvil
2012-01-02 14:10 ` [patch] Fix gdb.cp/gdb2495.exp regression with gcc-4.7 Pedro Alves
2012-01-02 14:20 ` Jan Kratochvil
2012-01-02 14:44 ` Pedro Alves
2012-01-02 14:53 ` Jan Kratochvil [this message]
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