From: "Willgerodt, Felix" <felix.willgerodt@intel.com>
To: "Metzger, Markus T" <markus.t.metzger@intel.com>
Cc: "gdb-patches@sourceware.org" <gdb-patches@sourceware.org>,
Simon Marchi <simon.marchi@polymtl.ca>,
Pedro Alves <pedro@palves.net>
Subject: RE: [PATCH v3 07/12] btrace, gdbserver: Add ptwrite to btrace_config_pt.
Date: Fri, 24 Jun 2022 06:57:05 +0000 [thread overview]
Message-ID: <MN2PR11MB45662C28EAAA4F2D1A852E9F8EB49@MN2PR11MB4566.namprd11.prod.outlook.com> (raw)
In-Reply-To: <DM8PR11MB57492AC469AEE3AE5BC1563FDEC99@DM8PR11MB5749.namprd11.prod.outlook.com>
> -----Original Message-----
> From: Metzger, Markus T <markus.t.metzger@intel.com>
> Sent: Dienstag, 10. Mai 2022 15:59
> To: Willgerodt, Felix <felix.willgerodt@intel.com>
> Cc: gdb-patches@sourceware.org; Simon Marchi
> <simon.marchi@polymtl.ca>; Pedro Alves <pedro@palves.net>
> Subject: RE: [PATCH v3 07/12] btrace, gdbserver: Add ptwrite to
> btrace_config_pt.
>
> Hello Felix,
>
> >> >@@ -7096,6 +7096,7 @@ linux_process_target::read_btrace_conf (const
> >> >btrace_target_info *tinfo,
> >> > case BTRACE_FORMAT_PT:
> >> > buffer_xml_printf (buffer, "<pt");
> >> > buffer_xml_printf (buffer, " size=\"0x%x\"", conf->pt.size);
> >> >+ buffer_xml_printf (buffer, " ptwrite=\"%d\"", conf->pt.ptwrite);
> >>
> >> Would we need to guard that with a check whether GDB supports this
> new
> >> attribute?
> >> Have you tried mixing an old GDB and a new gdbserver?
> >
> >I don't see how we could guard here.
> >If I use master for GDB and master + ptwrite for gdbserver,
> >recording and the history commands work without error message.
> >That might just mean that there is no length check on GDB side.
> >But that won't be added to old GDBs anyway.
>
> I think the answer is that unknown attributes will get ignored so we should
> be fine.
>
> Let's also check the other direction where GDB would be able to handle the
> new
> ptwrite attribute but gdbserver doesn't provide it.
Just fyi: I did that as well and didn't see any problems.
Felix
Intel Deutschland GmbH
Registered Address: Am Campeon 10, 85579 Neubiberg, Germany
Tel: +49 89 99 8853-0, www.intel.de <http://www.intel.de>
Managing Directors: Christin Eisenschmid, Sharon Heck, Tiffany Doon Silva
Chairperson of the Supervisory Board: Nicole Lau
Registered Office: Munich
Commercial Register: Amtsgericht Muenchen HRB 186928
next prev parent reply other threads:[~2022-06-24 6:57 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-16 7:41 [PATCH v3 00/12] Extensions for PTWRITE Felix Willgerodt
2021-06-16 7:41 ` [PATCH v3 01/12] btrace: Introduce auxiliary instructions Felix Willgerodt
2021-08-12 11:06 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 02/12] btrace: Enable auxiliary instructions in record instruction-history Felix Willgerodt
2021-08-12 11:06 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 03/12] btrace: Enable auxiliary instructions in record function-call-history Felix Willgerodt
2021-08-12 11:14 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 04/12] btrace: Handle stepping and goto for auxiliary instructions Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 05/12] python: Introduce gdb.RecordAuxiliary class Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2021-06-16 7:41 ` [PATCH v3 06/12] python: Add clear() to gdb.Record Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 07/12] btrace, gdbserver: Add ptwrite to btrace_config_pt Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-10 13:59 ` Metzger, Markus T
2022-06-24 6:57 ` Willgerodt, Felix [this message]
2021-06-16 7:42 ` [PATCH v3 08/12] btrace, linux: Enable ptwrite packets Felix Willgerodt
2021-08-12 11:07 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 09/12] btrace, python: Enable ptwrite listener registration Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-30 14:55 ` Metzger, Markus T
2022-05-31 11:26 ` Willgerodt, Felix
2022-05-31 11:50 ` Eli Zaretskii
2021-06-16 7:42 ` [PATCH v3 10/12] btrace, python: Enable calling the ptwrite listener Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
2022-05-30 15:01 ` Metzger, Markus T
2021-06-16 7:42 ` [PATCH v3 11/12] gdb, testsuite, lib: Add libipt version check Felix Willgerodt
2021-08-13 10:36 ` Metzger, Markus T
2022-05-02 9:55 ` Willgerodt, Felix
2021-06-16 7:42 ` [PATCH v3 12/12] btrace: Extend ptwrite event decoding Felix Willgerodt
2021-06-17 7:00 ` Eli Zaretskii
2021-06-17 11:51 ` Willgerodt, Felix
2021-08-13 13:36 ` Metzger, Markus T
2022-05-06 11:26 ` Willgerodt, Felix
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