[PATCH 11/28] perf callchain: Add callchain_cursor_snapshot()

Namhyung Kim
2014-01-08T08:47:36Z

The callchain_cursor_snapshot() is for saving current status of the
callchain. It'll be used to accumulate callchain information for each node.

Cc: Arun Sharma <asharma@fb.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/callchain.h | 9 +++++++++
1 file changed, 9 insertions(+)

diff --git a/tools/perf/util/callchain.h b/tools/perf/util/callchain.h
index 08b25af9eea1..bad694287cb8 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -151,4 +151,13 @@ int record_parse_callchain_opt(const struct option *opt, const char *arg, int un
int record_callchain_opt(const struct option *opt, const char *arg, int unset);

extern const char record_callchain_help[];
+
+static inline void callchain_cursor_snapshot(struct callchain_cursor *dest,
+ struct callchain_cursor *src)
+{
+ *dest = *src;
+
+ dest->first = src->curr;
+ dest->nr -= src->pos;
+}
#endif /* __PERF_CALLCHAIN_H */
--
1.7.11.7