linux-kernel - [tip:perf/urgent] perf report: Always honor callchain order for inlined nodes

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Date:   Wed, 24 May 2017 00:06:04 -0700
From:   tip-bot for Milian Wolff <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, hpa@...or.com, jolsa@...hat.com,
        yao.jin@...ux.intel.com, milian.wolff@...b.com,
        torvalds@...ux-foundation.org, tglx@...utronix.de,
        dsahern@...il.com, linux-kernel@...r.kernel.org, acme@...hat.com,
        jolsa@...nel.org, a.p.zijlstra@...llo.nl, namhyung@...nel.org,
        mingo@...nel.org, acme@...nel.org
Subject: [tip:perf/urgent] perf report: Always honor callchain order for
 inlined nodes

Commit-ID:  28071f51839e393f697d0d1df0b223a4bc373606
Gitweb:     http://git.kernel.org/tip/28071f51839e393f697d0d1df0b223a4bc373606
Author:     Milian Wolff <milian.wolff@...b.com>
AuthorDate: Wed, 24 May 2017 15:21:27 +0900
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 24 May 2017 08:41:48 +0200

perf report: Always honor callchain order for inlined nodes

So far, the inlined nodes where only reversed when we built perf
against libbfd. If that was not available, the addr2line fallback
code path was missing the inline_list__reverse call.

Now we always add the nodes in the correct order within
inline_list__append. This removes the need to reverse the list
and also ensures that all callers construct the list in the right
order.

Signed-off-by: Milian Wolff <milian.wolff@...b.com>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Yao Jin <yao.jin@...ux.intel.com>
Cc: kernel-team@....com
Link: http://lkml.kernel.org/r/20170524062129.32529-6-namhyung@kernel.org
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 tools/perf/util/srcline.c | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 5e376d6..6af0364 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -56,7 +56,10 @@ static int inline_list__append(char *filename, char *funcname, int line_nr,
 		}
 	}
 
-	list_add_tail(&ilist->list, &node->val);
+	if (callchain_param.order == ORDER_CALLEE)
+		list_add_tail(&ilist->list, &node->val);
+	else
+		list_add(&ilist->list, &node->val);
 
 	return 0;
 }
@@ -200,14 +203,6 @@ static void addr2line_cleanup(struct a2l_data *a2l)
 
 #define MAX_INLINE_NEST 1024
 
-static void inline_list__reverse(struct inline_node *node)
-{
-	struct inline_list *ilist, *n;
-
-	list_for_each_entry_safe_reverse(ilist, n, &node->val, list)
-		list_move_tail(&ilist->list, &node->val);
-}
-
 static int addr2line(const char *dso_name, u64 addr,
 		     char **file, unsigned int *line, struct dso *dso,
 		     bool unwind_inlines, struct inline_node *node)
@@ -250,11 +245,6 @@ static int addr2line(const char *dso_name, u64 addr,
 				ret = 1;
 			}
 		}
-
-		if ((node != NULL) &&
-		    (callchain_param.order != ORDER_CALLEE)) {
-			inline_list__reverse(node);
-		}
 	}
 
 	if (file) {