From: Kevin Pouget <kevin.pouget@gmail.com>
Cc: gdb@sourceware.org
Subject: Re: GDB Python API: stop/continue after breakpoint
Date: Fri, 11 Mar 2011 17:52:00 -0000 [thread overview]
Message-ID: <AANLkTimdG3HKmwKCwaZW-Mz27_SFOBYq9=aHezkDYSWs@mail.gmail.com> (raw)
In-Reply-To: <AANLkTin_a87WgchmZnzi9_XX4DXh8q-r3P7EyyDAzTA4@mail.gmail.com>
thanks for your answer, the patch seems to feature what I was looking for.
I'm a bit surprised that the stop/continue decision can't be done in
this breakpoint_stop handler, but I guess that was too complicated ?
> On Fri, Mar 11, 2011 at 5:25 PM, Phil Muldoon <pmuldoon@redhat.com> wrote:
>>
>> Kevin Pouget <kevin.pouget@gmail.com> writes:
>>
>> > Hello,
>> >
>> > I've tried the GDB python interface today, which seems quite
>> > efficient, but there is one important thing I couldn't figure out by
>> > myself:
>> >
>> > how to restart GDB when a[n internal] breakpoint is hit ?
>> > from the testsuite I've got this code:
>>
>>
>> You almost can. One part is pending:
>>
>> http://sourceware.org/ml/gdb-patches/2011-03/msg00656.html
>>
>> The implementation of the "stop" API. The idea behind this is that if a
>> breakpoint is hit, that is tracked from Python and has an implemented
>> stop method, that method would be called. You can do what you like in
>> that method. If you want the inferior process to continue, return True
>> otherwise return False (and print out/do whatever else you need to do in
>> Python).
>>
>> Because internal breakpoints are not tracked by default in the Python
>> Breakpoint API, you would have to create your breakpoint by
>> instantiating a gdb.Breakpoint class, and pass the keyword
>> internal=True.
>>
>> So, long story short soon. OTOH I'm not sure if there is a unhacky way
>> of doing it now. You could use a convenience function, but that patch
>> is replacing that hacky way.
>>
>> Cheers
>>
>> Phil
>> >
>> > def breakpoint_stop_handler (event):
>> > if (isinstance (event, gdb.StopEvent)):
>> > print "event type: stop"
>> > if (isinstance (event, gdb.BreakpointEvent)):
>> > print "stop reason: breakpoint"
>> > print "breakpoint number: %s" % (event.breakpoint.number)
>> > if ( event.inferior_thread is not None) :
>> > print "thread num: %s" % (event.inferior_thread.num);
>> > else:
>> > print "all threads stopped"
>> >
>> > gdb.events.stop.connect (breakpoint_stop_handler)
>> >
>> >
>> > which where I get the notification of the stop, but I'd to be able to
>> > tell GDB something like
>> >
>> > enum bpstat_what_main_action {
>> > /* Remove breakpoints, single step once, then put them back in and
>> > go back to what we were doing. It's possible that this should
>> > be removed from the main_action and put into a separate field,
>> > to more cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
>> > BPSTAT_WHAT_SINGLE,
>> > /* Stop silently. */
>> > BPSTAT_WHAT_STOP_SILENT,
>> >
>> > /* Stop and print. */
>> > BPSTAT_WHAT_STOP_NOISY,
>> > ...
>> > }
>> >
>> > to continue silently, stop silently or print the breakpoint hit.
>> >
>> > is it possible at this stage ?
>> >
>> > Thanks,
>> >
>> > Kevin
>
next prev parent reply other threads:[~2011-03-11 17:52 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-11 16:09 Kevin Pouget
2011-03-11 16:25 ` Phil Muldoon
[not found] ` <AANLkTin_a87WgchmZnzi9_XX4DXh8q-r3P7EyyDAzTA4@mail.gmail.com>
2011-03-11 17:52 ` Kevin Pouget [this message]
2011-04-20 14:59 ` Kevin Pouget
2011-04-20 15:15 ` Phil Muldoon
2011-04-20 15:39 ` Tom Tromey
2011-04-21 13:01 ` Kevin Pouget
[not found] ` <BANLkTinwMfsxA24q-5ekbapVdM_OP6rOsQ@mail.gmail.com>
2011-04-21 14:32 ` Kevin Pouget
2011-04-20 15:20 ` Tom Tromey
2011-03-21 14:20 ` Kevin Pouget
2011-03-21 14:39 ` Phil Muldoon
2011-03-21 15:11 ` Kevin Pouget
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