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perf unwind: Unwind with libdw doesn't take symfs into account

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[ Upstream commit 3d20c62466 ]

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>
This commit is contained in:
Martin Vuille
2018-02-11 16:24:20 -05:00
committed by Greg Kroah-Hartman
parent 0b926c828e
commit 9401f4e6e9
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/unwind-libdw.c
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@@ -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;