From: Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
To: Jiri Olsa <jolsa@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Clark Williams <williams@redhat.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH 04/15] perf tools: Add map_groups to 'struct addr_location'
Date: Fri, 29 Nov 2019 12:17:33 -0300 [thread overview]
Message-ID: <20191129151733.GC26963@kernel.org> (raw)
In-Reply-To: <20191129134056.GE14169@krava>
Em Fri, Nov 29, 2019 at 02:40:56PM +0100, Jiri Olsa escreveu:
> On Tue, Nov 12, 2019 at 03:37:46PM -0300, Arnaldo Carvalho de Melo wrote:
> > From: Arnaldo Carvalho de Melo <acme@redhat.com>
> >
> > From there we can get al->mg->machine, so replace that field with the
> > more useful 'struct map_groups' that for now we're obtaining from
> > al->map->groups, and that is one thing getting into the way of maps
> > being fully shareable.
> >
> > Cc: Adrian Hunter <adrian.hunter@intel.com>
> > Cc: Andi Kleen <ak@linux.intel.com>
> > Cc: Jiri Olsa <jolsa@kernel.org>
> > Cc: Namhyung Kim <namhyung@kernel.org>
> > Link: https://lkml.kernel.org/n/tip-4qdducrm32tgrjupcp0kjh1e@git.kernel.org
> > Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
> > ---
> > tools/perf/util/callchain.c | 6 +++---
> > tools/perf/util/db-export.c | 12 ++++++------
> > tools/perf/util/event.c | 6 +++---
> > .../perf/util/scripting-engines/trace-event-python.c | 2 +-
> > tools/perf/util/symbol.h | 2 +-
> > 5 files changed, 14 insertions(+), 14 deletions(-)
> >
> > diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
> > index 9a9b56ed3f0a..89faa644b0bc 100644
> > --- a/tools/perf/util/callchain.c
> > +++ b/tools/perf/util/callchain.c
> > @@ -1119,8 +1119,8 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
> > goto out;
> > }
> >
> > - if (al->map->groups == &al->machine->kmaps) {
> > - if (machine__is_host(al->machine)) {
> > + if (al->mg == &al->mg->machine->kmaps) {
>
> heya, I'm getting segfault because of this change
>
> perf record --call-graph dwarf ./ex
>
> (gdb) r report --stdio
> Program received signal SIGSEGV, Segmentation fault.
> fill_callchain_info (al=0x7fffffffa1b0, node=0xcd2bd0, hide_unresolved=false) at util/callchain.c:1122
> 1122 if (al->maps == &al->maps->machine->kmaps) {
> (gdb) p al->maps
> $1 = (struct maps *) 0x0
>
> I wish all those map changes would go through some review,
> I have no idea how the code works now ;-)
ouch, I did tons of tests, obviously some more, and reviewing, would
catch these, my bad, will try and fix this...
And yeah, I reproduced the problem, working on a fix.
- Arnaldo
next prev parent reply other threads:[~2019-11-29 15:17 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 18:37 [GIT PULL] perf/core improvements and fixes Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 01/15] perf map: Use map->dso->kernel + map__kmaps() in map__kmaps() Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 02/15] perf symbols: Stop using map->groups, we can use kmaps instead Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 03/15] perf map_groups: Pass the object to map_groups__find_ams() Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 04/15] perf tools: Add map_groups to 'struct addr_location' Arnaldo Carvalho de Melo
2019-11-29 13:40 ` Jiri Olsa
2019-11-29 15:17 ` Arnaldo Carvalho de Melo [this message]
2019-11-29 16:06 ` Arnaldo Carvalho de Melo
2019-11-29 18:03 ` Jiri Olsa
2019-11-29 18:59 ` Arnaldo Carvalho de Melo
2019-11-29 19:09 ` Jiri Olsa
2019-11-12 18:37 ` [PATCH 05/15] perf annotate: Pass a 'map_symbol' in places receiving a pair of 'map' and 'symbol' pointers Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 06/15] perf unwind: Use 'struct map_symbol' in 'struct unwind_entry' Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 07/15] perf callchain: Use 'struct map_symbol' in 'struct callchain_cursor_node' Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 08/15] pref tools: Make 'struct addr_map_symbol' contain 'struct map_symbol' Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 09/15] perf symbols: Use kmaps(map)->machine when we know its a kernel map Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 10/15] perf tools: Add a 'struct map_groups' pointer to 'struct map_symbol' Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 11/15] perf annotate: Stop using map->groups, use map_symbol->mg instead Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 12/15] perf map: Combine maps__fixup_overlappings with its only use Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 13/15] perf map: Remove ->groups from 'struct map' Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 14/15] perf tool: Provide an option to print perf_event_open args and return value Arnaldo Carvalho de Melo
2019-11-12 18:37 ` [PATCH 15/15] perf parse: Use YYABORT to clear stack after failure, plugging leaks Arnaldo Carvalho de Melo
2019-11-15 7:35 ` [GIT PULL] perf/core improvements and fixes Ingo Molnar
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