5.1-stable patches

[thirdparty/kernel/stable-queue.git] / releases / 3.18.134 / perf-unwind-unwind-with-libdw-doesn-t-take-symfs-int.patch

From 0529b472d53efb4868c72c2cc164051e1f9a6ce1 Mon Sep 17 00:00:00 2001
From: Martin Vuille <jpmv27@aim.com>
Date: Sun, 11 Feb 2018 16:24:20 -0500
Subject: perf unwind: Unwind with libdw doesn't take symfs into account

[ Upstream commit 3d20c6246690219881786de10d2dda93f616d0ac ]

Path passed to libdw for unwinding doesn't include symfs path
if specified, so unwinding fails because ELF file is not found.

Similar to unwinding with libunwind, pass symsrc_filename instead
of long_name. If there is no symsrc_filename, fallback to long_name.

Signed-off-by: Martin Vuille <jpmv27@aim.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/20180211212420.18388-1-jpmv27@aim.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/unwind-libdw.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -47,7 +47,7 @@ static int __report_module(struct addr_l
 
 	if (!mod)
 		mod = dwfl_report_elf(ui->dwfl, dso->short_name,
-				      dso->long_name, -1, al->map->start,
+				      (dso->symsrc_filename ? dso->symsrc_filename : dso->long_name), -1, al->map->start,
 				      false);
 
 	return mod && dwfl_addrmodule(ui->dwfl, ip) == mod ? 0 : -1;