perf symbols: Precisely specify if dso->{long,short}_name should be freed

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 5b81bb2..8151d23 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -456,6 +456,7 @@
 			goto out_problem;
 
 		map->dso->short_name = name;
+		map->dso->sname_alloc = 1;
 		map->end = map->start + self->mmap.len;
 	} else if (is_kernel_mmap) {
 		const char *symbol_name = (self->mmap.filename +