linux-kernel - [PATCHSET 00/17] tools lib traceevent: Plugin unload enhancement

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Date:	Wed, 15 Jan 2014 10:45:23 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	Frederic Weisbecker <fweisbec@...il.com>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>
Subject: [PATCHSET 00/17] tools lib traceevent: Plugin unload enhancement

Hello,

When plugins are loaded, they register various event and function
handlers.  But they don't unregister even after the plugins unloaded
so that events could have refererences to non-existing handlers.

This patchset added relevant unregister functions to handle that.

Note that this is not a problem as of now since all of users unload
plugins after finishing their access to events.  But being a generic
library, it should be handled properly IMHO.

The patch 1-4 are resend of the previous die removal series so
independent to this series.

I put the series on the 'libtraceevent/plugin-v1' branch in my tree

  git://git.kernel.org/pub/scm/linux/kernel/git/namhyung/linux-perf.git

Any comments are welcome, thanks
Namhyung


Namhyung Kim (17):
  tools lib traceevent: Add state member to struct trace_seq
  tools lib traceevent: Check return value of realloc()
  tools lib traceevent: Get rid of malloc_or_die() in trace_seq_init()
  tools lib traceevent: Get rid of die() finally!!
  tools lib traceevent: Make plugin unload function receive pevent
  tools lib traceevent: Add pevent_unregister_event_handler()
  tools lib traceevent: Add pevent_unregister_print_function()
  tools lib traceevent: Unregister handler when function plugin
    unloaded
  tools lib traceevent: Unregister handler when hrtimer plugin unloaded
  tools lib traceevent: Unregister handler when kmem plugin unloaded
  tools lib traceevent: Unregister handler when kvm plugin unloaded
  tools lib traceevent: Unregister handler when sched_switch plugin
    unloaded
  tools lib traceevent: Unregister handler when mac80211 plugin
    unloaded
  tools lib traceevent: Unregister handler when cfg80211 plugin
    unloaded
  tools lib traceevent: Unregister handler when jbd2 plugin unloaded
  tools lib traceevent: Unregister handler when scsi plugin unloaded
  tools lib traceevent: Unregister handler when xen plugin unloaded

 tools/lib/traceevent/Makefile              |   2 +-
 tools/lib/traceevent/event-parse.c         | 136 ++++++++++++++++++++++++++---
 tools/lib/traceevent/event-parse.h         |  19 +++-
 tools/lib/traceevent/event-plugin.c        |   4 +-
 tools/lib/traceevent/event-utils.h         |   4 -
 tools/lib/traceevent/parse-utils.c         |  44 ----------
 tools/lib/traceevent/plugin_cfg80211.c     |   7 ++
 tools/lib/traceevent/plugin_function.c     |   5 +-
 tools/lib/traceevent/plugin_hrtimer.c      |  10 +++
 tools/lib/traceevent/plugin_jbd2.c         |  11 +++
 tools/lib/traceevent/plugin_kmem.c         |  22 +++++
 tools/lib/traceevent/plugin_kvm.c          |  30 +++++++
 tools/lib/traceevent/plugin_mac80211.c     |   7 ++
 tools/lib/traceevent/plugin_sched_switch.c |  12 +++
 tools/lib/traceevent/plugin_scsi.c         |   7 ++
 tools/lib/traceevent/plugin_xen.c          |   7 ++
 tools/lib/traceevent/trace-seq.c           |  58 ++++++++++--
 tools/perf/util/trace-event.c              |   2 +-
 18 files changed, 310 insertions(+), 77 deletions(-)

-- 
1.7.11.7

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