From: Daniel Jacobowitz <dan@codesourcery.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: GDB <gdb@sourceware.org>
Subject: Re: Is CLONE_VM really needed in gdbserver?
Date: Wed, 27 Jan 2010 00:08:00 -0000 [thread overview]
Message-ID: <20100127000821.GA29862@caradoc.them.org> (raw)
In-Reply-To: <6dc9ffc81001261551j6221db6v88e96713d6dd9497@mail.gmail.com>
On Tue, Jan 26, 2010 at 03:51:38PM -0800, H.J. Lu wrote:
> Hi,
>
> There is a race condition between gdbserver and ld.so on Linux/x86-64:
>
> http://www.sourceware.org/bugzilla/show_bug.cgi?id=11214
>
> Is CLONE_VM really needed? In general, CLONE_VM is a very bad
> idea if there is any symbol lookup in both parent and child processes.
It is necessary because gdbserver supports uClinux. However, on Linux
we might be able to get away with fork (see linux_tracefork_child in
gdb/linux-nat.c).
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2010-01-27 0:08 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-26 23:51 H.J. Lu
2010-01-27 0:08 ` Daniel Jacobowitz [this message]
2010-01-27 22:12 ` [patch] Fix CLONE_VM vs. TLS [Re: Is CLONE_VM really needed in gdbserver?] Jan Kratochvil
2010-01-28 16:22 ` H.J. Lu
2010-01-28 17:01 ` Daniel Jacobowitz
2010-01-29 1:26 ` Jan Kratochvil
2010-01-29 2:30 ` Daniel Jacobowitz
2010-01-29 12:41 ` Jan Kratochvil
2010-02-01 20:20 ` Jan Kratochvil
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