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| author |   Vincent Whitchurch <vincent.whitchurch@axis.com> | 2023-06-30 11:11:48 +0200 |
|---|---|---|
| committer |   Namhyung Kim <namhyung@kernel.org> | 2023-07-01 11:12:22 -0700 |
| commit | 5f06267b6e6a10dd0cac4eb248fcc51f18c260cc (patch) | |
| tree | 6ea70dfb269785290e5c4cd7fbe9799a90a5b377 /tools/perf/util/unwind-libdw.c | |
| parent | perf symbol: Fix uninitialized return value in symbols__find_by_name() (diff) | |
| download | wireguard-linux-5f06267b6e6a10dd0cac4eb248fcc51f18c260cc.tar.xz wireguard-linux-5f06267b6e6a10dd0cac4eb248fcc51f18c260cc.zip | |
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 <vincent.whitchurch@axis.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: kernel@axis.com
Cc: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Link: https://lore.kernel.org/r/20230630-perf-libdw-symfs-v2-1-469760dd4d5b@axis.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'tools/perf/util/unwind-libdw.c')
| -rw-r--r-- | tools/perf/util/unwind-libdw.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c index 83eea968482e..2a96df4c8d42 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]; |