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From:   Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>
Date:   Sat, 18 Apr 2020 09:04:03 -0300
To:     Adrian Hunter <adrian.hunter@intel.com>
Cc:     Jiri Olsa <jolsa@redhat.com>, Andi Kleen <ak@linux.intel.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 12/16] perf tools: Move and globalize
 perf_evsel__find_pmu() and perf_evsel__is_aux_event()
Message-ID: <20200418120403.GB6031@kernel.org>
References: <20200401101613.6201-1-adrian.hunter@intel.com>
 <20200401101613.6201-13-adrian.hunter@intel.com>
 <20200418115017.GA6031@kernel.org>
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Em Sat, Apr 18, 2020 at 08:50:17AM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Wed, Apr 01, 2020 at 01:16:09PM +0300, Adrian Hunter escreveu:
> > Move and globalize 2 functions so that they can be reused.
> 
> So this breaks this:
> 
> [acme@five perf]$ perf test -v python
> Couldn't bump rlimit(MEMLOCK), failures may take place when creating BPF maps, etc
> 19: 'import perf' in python                               :
> --- start ---
> test child forked, pid 168414
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> ImportError: /tmp/build/perf/python/perf.so: undefined symbol: perf_pmu__scan
> test child finished with -1
> ---- end ----
> 'import perf' in python: FAILED!
> [acme@five perf]$
> 
> I'm trying to fix...

I solved this by moving those functions to tools/perf/util/pmu.c
instead.

Please consider running 'perf test' before sending your patches to me
next time,

Thanks,

- Arnaldo
  
> > Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
> > ---
> >  tools/perf/util/auxtrace.c | 19 -------------------
> >  tools/perf/util/evsel.c    | 20 ++++++++++++++++++++
> >  tools/perf/util/evsel.h    |  3 +++
> >  3 files changed, 23 insertions(+), 19 deletions(-)
> > 
> > diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
> > index 809a09e75c55..33ad33378a90 100644
> > --- a/tools/perf/util/auxtrace.c
> > +++ b/tools/perf/util/auxtrace.c
> > @@ -58,25 +58,6 @@
> >  #include "symbol/kallsyms.h"
> >  #include <internal/lib.h>
> >  
> > -static struct perf_pmu *perf_evsel__find_pmu(struct evsel *evsel)
> > -{
> > -	struct perf_pmu *pmu = NULL;
> > -
> > -	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
> > -		if (pmu->type == evsel->core.attr.type)
> > -			break;
> > -	}
> > -
> > -	return pmu;
> > -}
> > -
> > -static bool perf_evsel__is_aux_event(struct evsel *evsel)
> > -{
> > -	struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
> > -
> > -	return pmu && pmu->auxtrace;
> > -}
> > -
> >  /*
> >   * Make a group from 'leader' to 'last', requiring that the events were not
> >   * already grouped to a different leader.
> > diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> > index 60e6cd49dee3..d4ab073c9fe7 100644
> > --- a/tools/perf/util/evsel.c
> > +++ b/tools/perf/util/evsel.c
> > @@ -44,6 +44,7 @@
> >  #include "stat.h"
> >  #include "string2.h"
> >  #include "memswap.h"
> > +#include "pmu.h"
> >  #include "util.h"
> >  #include "../perf-sys.h"
> >  #include "util/parse-branch-options.h"
> > @@ -100,6 +101,25 @@ int perf_evsel__object_config(size_t object_size,
> >  	return 0;
> >  }
> >  
> > +struct perf_pmu *perf_evsel__find_pmu(struct evsel *evsel)
> > +{
> > +	struct perf_pmu *pmu = NULL;
> > +
> > +	while ((pmu = perf_pmu__scan(pmu)) != NULL) {
> > +		if (pmu->type == evsel->core.attr.type)
> > +			break;
> > +	}
> > +
> > +	return pmu;
> > +}
> > +
> > +bool perf_evsel__is_aux_event(struct evsel *evsel)
> > +{
> > +	struct perf_pmu *pmu = perf_evsel__find_pmu(evsel);
> > +
> > +	return pmu && pmu->auxtrace;
> > +}
> > +
> >  #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y))
> >  
> >  int __perf_evsel__sample_size(u64 sample_type)
> > diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
> > index e64ed4202cab..a463bc65b001 100644
> > --- a/tools/perf/util/evsel.h
> > +++ b/tools/perf/util/evsel.h
> > @@ -158,6 +158,9 @@ int perf_evsel__object_config(size_t object_size,
> >  			      int (*init)(struct evsel *evsel),
> >  			      void (*fini)(struct evsel *evsel));
> >  
> > +struct perf_pmu *perf_evsel__find_pmu(struct evsel *evsel);
> > +bool perf_evsel__is_aux_event(struct evsel *evsel);
> > +
> >  struct evsel *perf_evsel__new_idx(struct perf_event_attr *attr, int idx);
> >  
> >  static inline struct evsel *evsel__new(struct perf_event_attr *attr)
> > -- 
> > 2.17.1
> > 
> 
> -- 
> 
> - Arnaldo

-- 

- Arnaldo