perf tools: Stop using a global trace events description list

The pevent thing is per perf.data file, so I made it stop being static
and become a perf_session member, so tools processing perf.data files
use perf_session and _there_ we read the trace events description into
session->pevent and then change everywhere to stop using that single
global pevent variable and use the per session one.

Note that it _doesn't_ fall backs to trace__event_id, as we're not
interested at all in what is present in the
/sys/kernel/debug/tracing/events in the workstation doing the analysis,
just in what is in the perf.data file.

This patch also introduces perf_session__set_tracepoints_handlers that
is the perf perf.data/session way to associate handlers to tracepoint
events by resolving their IDs using the events descriptions stored in a
perf.data file. Make 'perf sched' use it.

Reported-by: Dmitry Antipov <dmitry.antipov@linaro.org>
Tested-by: Dmitry Antipov <dmitry.antipov@linaro.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linaro-dev@lists.linaro.org
Cc: patches@linaro.org
Link: http://lkml.kernel.org/r/20120625232016.GA28525@infradead.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index c71a1a7b05ed..7c435bde6eb0 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -33,6 +33,7 @@ struct perf_session {
         struct machine          host_machine;
         struct rb_root          machines;
         struct perf_evlist      *evlist;
+        struct pevent           *pevent;
         /*
          * FIXME: Need to split this up further, we need global
          *        stats + per event stats. 'perf diff' also needs
@@ -158,4 +159,13 @@ int perf_session__cpu_bitmap(struct perf_session *session,
                              const char *cpu_list, unsigned long *cpu_bitmap);
 
 void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
+
+struct perf_evsel_str_handler;
+
+int __perf_session__set_tracepoints_handlers(struct perf_session *session,
+                                             const struct perf_evsel_str_handler *assocs,
+                                             size_t nr_assocs);
+
+#define perf_session__set_tracepoints_handlers(session, array) \
+        __perf_session__set_tracepoints_handlers(session, array, ARRAY_SIZE(array))
 #endif /* __PERF_SESSION_H */