linux-kernel - [tip:perf/core] perf callchain: Add callchain_cursor

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Message-ID: <tip-be1f13e30862ab6b0fffaecd556856a965cefa0c@git.kernel.org>
Date:	Tue, 3 Jun 2014 11:32:51 -0700
From:	tip-bot for Namhyung Kim <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	jolsa@...nel.org, rodrigo@...g.com.ar, namhyung@...nel.org,
	fweisbec@...il.com, tglx@...utronix.de, asharma@...com
Subject: [tip:perf/core] perf callchain: Add callchain_cursor_snapshot()

Commit-ID:  be1f13e30862ab6b0fffaecd556856a965cefa0c
Gitweb:     http://git.kernel.org/tip/be1f13e30862ab6b0fffaecd556856a965cefa0c
Author:     Namhyung Kim <namhyung@...nel.org>
AuthorDate: Mon, 10 Sep 2012 13:38:00 +0900
Committer:  Jiri Olsa <jolsa@...nel.org>
CommitDate: Sun, 1 Jun 2014 14:34:59 +0200

perf callchain: Add callchain_cursor_snapshot()

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

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Tested-by: Arun Sharma <asharma@...com>
Tested-by: Rodrigo Campos <rodrigo@...g.com.ar>
Cc: Frederic Weisbecker <fweisbec@...il.com>
Link: http://lkml.kernel.org/r/1401335910-16832-9-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@...nel.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 24a53d5..8f84423 100644
--- a/tools/perf/util/callchain.h
+++ b/tools/perf/util/callchain.h
@@ -167,4 +167,13 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
 
 extern const char record_callchain_help[];
 int parse_callchain_report_opt(const char *arg);
+
+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 */
--
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