1 files changed, 13 insertions, 2 deletions

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index ea17dfb85baa..cc5e6be46d86 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -107,8 +107,19 @@ struct perf_session *perf_session__new(const char *filename, int mode,
                                        bool force, bool repipe,
                                        struct perf_tool *tool)
 {
-        size_t len = filename ? strlen(filename) : 0;
-        struct perf_session *self = zalloc(sizeof(*self) + len);
+        struct perf_session *self;
+        struct stat st;
+        size_t len;
+
+        if (!filename || !strlen(filename)) {
+                if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
+                        filename = "-";
+                else
+                        filename = "perf.data";
+        }
+
+        len = strlen(filename);
+        self = zalloc(sizeof(*self) + len);
 
         if (self == NULL)
                 goto out;