perf evlist: Fix parsing with no sample_id_all bit set

The perf_evlist__event2evsel() is changed to handle non-sample events
(such as mmap events) that have no id sample appended i.e. when
sample_id_all is not set.

Note that such events have a fixed format, so that the selected event
(evsel) they are associated with is immaterial.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: David Ahern <dsahern@gmail.com>
Acked-by: David Ahern <dsahern@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1378325897-3840-3-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index b8727ae45e3b..7101283ac3c5 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -446,20 +446,25 @@ static int perf_evlist__event2id(struct perf_evlist *evlist,
 static struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist,
                                                    union perf_event *event)
 {
+        struct perf_evsel *first = perf_evlist__first(evlist);
         struct hlist_head *head;
         struct perf_sample_id *sid;
         int hash;
         u64 id;
 
         if (evlist->nr_entries == 1)
-                return perf_evlist__first(evlist);
+                return first;
+
+        if (!first->attr.sample_id_all &&
+            event->header.type != PERF_RECORD_SAMPLE)
+                return first;
 
         if (perf_evlist__event2id(evlist, event, &id))
                 return NULL;
 
         /* Synthesized events have an id of zero */
         if (!id)
-                return perf_evlist__first(evlist);
+                return first;
 
         hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
         head = &evlist->heads[hash];