perf/live: don't synthesize build ids at the end of a live mode trace

It doesn't really make sense to record the build ids at the end of a
live mode session - live mode samples need that information during the
trace rather than at the end.

Leave event__synthesize_build_id() in place, however; we'll still be
using that to synthesize build ids in a more timely fashion in a
future patch.

Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <1272696080-16435-2-git-send-email-tzanussi@gmail.com>
Signed-off-by: NTom Zanussi <tzanussi@gmail.com>
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-record.c

@@ -446,13 +446,6 @@ static void atexit_header(void)
 
 		process_buildids();
 		perf_header__write(&session->header, output, true);
-	} else {
-		int err;
-
-		err = event__synthesize_build_ids(process_synthesized_event,
-						  session);
-		if (err < 0)
-			pr_err("Couldn't synthesize build ids.\n");
 	}
 }
 

tools/perf/util/header.c

@@ -1136,67 +1136,6 @@ int event__synthesize_build_id(struct dso *pos, u16 misc,
 	return err;
 }
 
-static int __event_synthesize_build_ids(struct list_head *head, u16 misc,
-					event__handler_t process,
-					struct machine *machine,
-					struct perf_session *session)
-{
-	struct dso *pos;
-
-	dsos__for_each_with_build_id(pos, head) {
-		int err;
-		if (!pos->hit)
-			continue;
-
-		err = event__synthesize_build_id(pos, misc, process,
-						 machine, session);
-		if (err < 0)
-			return err;
-	}
-
-	return 0;
-}
-
-int event__synthesize_build_ids(event__handler_t process,
-				struct perf_session *session)
-{
-	int err = 0;
-	u16 kmisc, umisc;
-	struct machine *pos;
-	struct rb_node *nd;
-
-	if (!dsos__read_build_ids(&session->header, true))
-		return 0;
-
-	for (nd = rb_first(&session->machines); nd; nd = rb_next(nd)) {
-		pos = rb_entry(nd, struct machine, rb_node);
-		if (machine__is_host(pos)) {
-			kmisc = PERF_RECORD_MISC_KERNEL;
-			umisc = PERF_RECORD_MISC_USER;
-		} else {
-			kmisc = PERF_RECORD_MISC_GUEST_KERNEL;
-			umisc = PERF_RECORD_MISC_GUEST_USER;
-		}
-
-		err = __event_synthesize_build_ids(&pos->kernel_dsos, kmisc,
-						   process, pos, session);
-		if (err == 0)
-			err = __event_synthesize_build_ids(&pos->user_dsos, umisc,
-							   process, pos, session);
-		if (err)
-			break;
-	}
-
-	if (err < 0) {
-		pr_debug("failed to synthesize build ids\n");
-		return err;
-	}
-
-	dsos__cache_build_ids(&session->header);
-
-	return 0;
-}
-
 int event__process_build_id(event_t *self,
 			    struct perf_session *session)
 {

tools/perf/util/header.h

@@ -122,8 +122,6 @@ int event__synthesize_build_id(struct dso *pos, u16 misc,
 			       event__handler_t process,
 			       struct machine *machine,
 			       struct perf_session *session);
-int event__synthesize_build_ids(event__handler_t process,
-				struct perf_session *session);
 int event__process_build_id(event_t *self, struct perf_session *session);
 
 #endif /* __PERF_HEADER_H */