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-rw-r--r--tools/perf/util/dso.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 5d7c7bcc6276..76e5c13afc8f 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1,3 +1,4 @@
+#include <asm/bug.h>
#include "symbol.h"
#include "dso.h"
#include "machine.h"
@@ -137,18 +138,23 @@ int dso__read_binary_type_filename(const struct dso *dso,
}
/*
- * Global list of open DSOs.
+ * Global list of open DSOs and the counter.
*/
static LIST_HEAD(dso__data_open);
+static long dso__data_open_cnt;
static void dso__list_add(struct dso *dso)
{
list_add_tail(&dso->data.open_entry, &dso__data_open);
+ dso__data_open_cnt++;
}
static void dso__list_del(struct dso *dso)
{
list_del(&dso->data.open_entry);
+ WARN_ONCE(dso__data_open_cnt <= 0,
+ "DSO data fd counter out of bounds.");
+ dso__data_open_cnt--;
}
static int __open_dso(struct dso *dso, struct machine *machine)