linux-kernel - [PATCH v2] perf report: always honor callchain order for inlined nodes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20170518083759.14421-1-milian.wolff@kdab.com>
Date:   Thu, 18 May 2017 10:37:59 +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 v2] 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.

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 | 23 ++++++++---------------
 1 file changed, 8 insertions(+), 15 deletions(-)

v2:
- directly create list in correct order as suggested by Namhyung

diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
index 5e376d64d59e..bbba9c69cfec 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) {
@@ -497,12 +487,15 @@ 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);
+
+	return node;
 }
 
 void inline_node__delete(struct inline_node *node)
-- 
2.13.0