Re: [PATCH 04/15] perf tools: Add map_groups to 'struct addr_location'
From: Jiri Olsa
Date: Fri Nov 29 2019 - 14:09:33 EST
On Fri, Nov 29, 2019 at 03:59:14PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Fri, Nov 29, 2019 at 07:03:54PM +0100, Jiri Olsa escreveu:
> > On Fri, Nov 29, 2019 at 01:06:31PM -0300, Arnaldo Carvalho de Melo wrote:
> > > Em Fri, Nov 29, 2019 at 12:17:33PM -0300, Arnaldo Carvalho de Melo escreveu:
> > > > Em Fri, Nov 29, 2019 at 02:40:56PM +0100, Jiri Olsa escreveu:
> > > > > > +++ 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.
>
> > > Can you try with this one-liner?
>
> > yep, it fixes the issue for me
>
> Thanks, I'm taking that as a Tested-by: you, in addition to the
> Reported-by,
>
sure, thanks
jirka