From: Oleg Nesterov <oleg@redhat.com>
To: archer@sourceware.org, utrace-devel@redhat.com
Subject: Re: gdbstub initial code, v12
Date: Mon, 04 Oct 2010 18:14:00 -0000 [thread overview]
Message-ID: <20101004181053.GA30217@redhat.com> (raw)
In-Reply-To: <20100930182320.GA17475@redhat.com>
On 09/30, Oleg Nesterov wrote:
>
> Right now $G doesn't change FPU registers.
It turns out, $G can't even set the REGSET_GENERAL reg correctly.
I noticed this only because the tracee sometimes dies during the
single-stepping inside the dynamic linker. Indeed, $G passes the
wrong fs_index==0 to genregs_set().
> Next: watchpoints.
While trying to understand what does this mean, I hit another bug
in ugdb. A multithreaded tracee can "hang" if gdb simulates
watchpoints with single-steps + mem-fetch/compare. Still can't
understand why this happens, this should be resolved. This never
happens if the tracee is single-threaded.
Oleg.
next prev parent reply other threads:[~2010-10-04 18:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-30 18:27 Oleg Nesterov
2010-10-04 18:14 ` Oleg Nesterov [this message]
2010-10-05 17:31 ` BUG: gdb && notification packets (Was: gdbstub initial code, v12) Oleg Nesterov
2010-10-05 18:30 ` Pedro Alves
2010-10-05 18:35 ` Pedro Alves
2010-10-06 17:23 ` Oleg Nesterov
2010-10-06 18:32 ` Pedro Alves
2010-10-07 23:03 ` Oleg Nesterov
2010-10-08 0:03 ` Pedro Alves
2010-10-08 0:23 ` Oleg Nesterov
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