From: Roland McGrath <roland@redhat.com>
To: Tom Tromey <tromey@redhat.com>
Cc: Oleg Nesterov <oleg@redhat.com>,
utrace-devel@redhat.com, "Frank Ch. Eigler" <fche@redhat.com>,
archer@sourceware.org
Subject: Re: ugdb && breakpoints
Date: Tue, 14 Sep 2010 19:38:00 -0000 [thread overview]
Message-ID: <20100914193804.99980403E8@magilla.sf.frob.com> (raw)
In-Reply-To: Tom Tromey's message of Friday, 10 September 2010 16:12:12 -0600 <m3aanpjlj7.fsf@fleche.redhat.com>
The traditional method is to restore the original instruction replaced by
the breakpoint in text, single-step over that instruction, then restore the
breakpoint in text, then continue. That method requires all-stop so that
while you are stepping the thread that just hit the breakpoint, you can't
have another thread run past that instruction and miss the breakpoint.
Both this traditional in-place method, and the instruction-copying method,
depend on using single-step. So "stepi" has to work before "break" can work.
Thanks,
Roland
next prev parent reply other threads:[~2010-09-14 19:38 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-08 19:22 gdbstub initial code, v9 Oleg Nesterov
2010-09-09 10:29 ` Jan Kratochvil
2010-09-09 15:06 ` Oleg Nesterov
2010-09-09 12:39 ` Frank Ch. Eigler
2010-09-09 15:33 ` Oleg Nesterov
2010-09-09 15:54 ` Oleg Nesterov
2010-09-09 16:07 ` Frank Ch. Eigler
2010-09-09 16:37 ` Oleg Nesterov
2010-09-09 16:11 ` Jan Kratochvil
2010-09-09 16:34 ` Oleg Nesterov
2010-09-09 16:36 ` Jan Kratochvil
2010-09-09 16:48 ` Oleg Nesterov
2010-09-09 16:50 ` Oleg Nesterov
2010-09-09 16:51 ` Tom Tromey
2010-09-10 10:12 ` Roland McGrath
2010-09-10 18:14 ` Oleg Nesterov
2010-09-10 19:43 ` Tom Tromey
2010-09-10 19:49 ` Oleg Nesterov
2010-09-13 5:54 ` Kevin Buettner
2010-09-14 2:20 ` Roland McGrath
2010-09-14 16:10 ` Oleg Nesterov
2010-09-14 16:30 ` Jan Kratochvil
2010-09-14 21:30 ` Tom Tromey
2010-09-15 19:43 ` Kevin Buettner
2010-09-10 22:03 ` ugdb && breakpoints Oleg Nesterov
2010-09-10 22:12 ` Tom Tromey
2010-09-14 19:38 ` Roland McGrath [this message]
2010-09-14 19:47 ` Oleg Nesterov
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