From: Daniel Jacobowitz <drow@mvista.com>
To: Elena Zannoni <ezannoni@redhat.com>
Cc: Michael Elizabeth Chastain <mec@shout.net>, gdb@sources.redhat.com
Subject: Re: backtrace through 'sleep', (1255 and 1253)
Date: Mon, 04 Aug 2003 15:36:00 -0000 [thread overview]
Message-ID: <20030804153619.GA4738@nevyn.them.org> (raw)
In-Reply-To: <16174.32383.696875.168608@localhost.redhat.com>
On Mon, Aug 04, 2003 at 11:40:47AM -0400, Elena Zannoni wrote:
> Unlikely to happen, I am afraid :-(
>
> > . Ask the gcc guys directly to not schedule any instructions between
> > 'push %ebp' and 'mov %esp, %ebp'.
> >
>
> more likely.
Not very, I think.
> > . Change gdb so that the prologue reader is more powerful. It doesn't
> > take much to get through the 'xor %ecx, %ecx' instruction. The
> > trouble is that there could be a billion different instructions
> > in there ('mov any-register, immediate'). The advantage is that
> > this would work without any changes to external software.
> >
>
> yes. How did the prologue analyzer changed between 5.3 and now?
Mark dramatically enhanced it at the same time he added dwarf2 CFI
unwinding. Unfortunately, the higher accuracy is causing it to assume
some functions are frameless which aren't.
--
Daniel Jacobowitz
MontaVista Software Debian GNU/Linux Developer
next prev parent reply other threads:[~2003-08-04 15:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-02 15:18 Michael Elizabeth Chastain
2003-08-04 15:33 ` Elena Zannoni
2003-08-04 15:36 ` Daniel Jacobowitz [this message]
2003-08-04 16:35 Michael Elizabeth Chastain
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