[PATCH 2/4] perf tools: Destroy unused symsrcs

[Namhyung Kim <namhyung@kernel.org>]

Stephane reported that perf report and annotate failed to process data
using lots of (> 500) shared libraries.  It was because of the limit
on number of open files (ulimit -n).

Currently when perf loads dso, it'll look for normal and dynamic
symbol tables.  And if it failed to find out both tables, it'll
iterate all of possible symtab types.  But many of them are useless
since they have no additional information and the problem is that it's
not close those files even though they're not used.  Fix it.

Reported-by: Stephane Eranian <eranian@google.com>
Cc: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/util/symbol.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index 46e2ede12c51..c3b014712fce 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1336,6 +1336,8 @@ int dso__load(struct dso *dso, struct map *map, symbol_filter_t filter)
 
 			if (syms_ss && runtime_ss)
 				break;
+		} else {
+			symsrc__destroy(ss);
 		}
 
 	}
-- 
1.7.11.7