linux-kernel - [PATCH] perf report: always honor callchain order for inlined nodes

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Date:   Tue, 16 May 2017 23:54:22 +0200
From:   Milian Wolff <milian.wolff@...b.com>
To:     Linux-kernel@...r.kernel.org
Cc:     linux-perf-users@...r.kernel.org,
        Milian Wolff <milian.wolff@...b.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        David Ahern <dsahern@...il.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Yao Jin <yao.jin@...ux.intel.com>
Subject: [PATCH] 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 this is done at the central place inside dso__parse_addr_inlines.

Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Yao Jin <yao.jin@...ux.intel.com>
Signed-off-by: Milian Wolff <milian.wolff@...b.com>
---
 tools/perf/util/srcline.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 62cf42c36955..8df6b29bf984 100644
--- a/tools/perf/util/srcline.c
+++ b/tools/perf/util/srcline.c
@@ -61,6 +61,14 @@ static int inline_list__append(char *filename, char *funcname, int line_nr,
 	return 0;
 }
 
+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);
+}
+
 #ifdef HAVE_LIBBFD_SUPPORT
 
 /*
@@ -200,14 +208,6 @@ 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)
@@ -245,11 +245,6 @@ static int addr2line(const char *dso_name, u64 addr,
 					return 0;
 			}
 		}
-
-		if ((node != NULL) &&
-		    (callchain_param.order != ORDER_CALLEE)) {
-			inline_list__reverse(node);
-		}
 	}
 
 	if (a2l->found && a2l->filename) {
@@ -493,12 +488,17 @@ char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
 struct inline_node *dso__parse_addr_inlines(struct dso *dso, u64 addr)
 {
 	const char *dso_name;
+	struct inline_node *node;
 
 	dso_name = dso__name(dso);
 	if (dso_name == NULL)
 		return NULL;
 
-	return addr2inlines(dso_name, addr, dso);
+	node = addr2inlines(dso_name, addr, dso);
+	if (node && callchain_param.order != ORDER_CALLEE)
+		inline_list__reverse(node);
+
+	return node;
 }
 
 void inline_node__delete(struct inline_node *node)
-- 
2.13.0