From: Martin Vuille <jpm...@aim.com>

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 <jpm...@aim.com>
Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Wang Nan <wangn...@huawei.com>
Link: http://lkml.kernel.org/r/20180211212420.18388-1-jpm...@aim.com
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/util/unwind-libdw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index 1e9c974faf67..8e969f28cc59 100644
--- a/tools/perf/util/unwind-libdw.c
+++ b/tools/perf/util/unwind-libdw.c
@@ -50,7 +50,7 @@ static int __report_module(struct addr_location *al, u64 ip,
 
        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;
-- 
2.14.3

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