From 5f06267b6e6a10dd0cac4eb248fcc51f18c260cc Mon Sep 17 00:00:00 2001 From: Vincent Whitchurch Date: Fri, 30 Jun 2023 11:11:48 +0200 Subject: [PATCH] perf: unwind: Fix symfs with libdw Pass the full path including the symfs (if any) to libdw. Without this unwinding fails with errors like this when a symfs is used: unwind: failed with 'No such file or directory'" Signed-off-by: Vincent Whitchurch Acked-by: Namhyung Kim Cc: Mark Rutland Cc: kernel@axis.com Cc: Ian Rogers Cc: Peter Zijlstra Cc: Adrian Hunter Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Alexander Shishkin Cc: Ingo Molnar Link: https://lore.kernel.org/r/20230630-perf-libdw-symfs-v2-1-469760dd4d5b@axis.com Signed-off-by: Namhyung Kim --- tools/perf/util/unwind-libdw.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c index 83eea96..2a96df4 100644 --- a/tools/perf/util/unwind-libdw.c +++ b/tools/perf/util/unwind-libdw.c @@ -66,9 +66,13 @@ static int __report_module(struct addr_location *al, u64 ip, mod = 0; } - if (!mod) - mod = dwfl_report_elf(ui->dwfl, dso->short_name, dso->long_name, -1, + if (!mod) { + char filename[PATH_MAX]; + + __symbol__join_symfs(filename, sizeof(filename), dso->long_name); + mod = dwfl_report_elf(ui->dwfl, dso->short_name, filename, -1, map__start(al->map) - map__pgoff(al->map), false); + } if (!mod) { char filename[PATH_MAX]; -- 2.7.4