diff mbox series

perf: unwind: Fix symfs with libdw

Message ID 20221125112743.2285759-1-vincent.whitchurch@axis.com
State New
Headers
Series perf: unwind: Fix symfs with libdw |

Commit Message

Vincent Whitchurch Nov. 25, 2022, 11:27 a.m. UTC 
  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>
---
 tools/perf/util/unwind-libdw.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/tools/perf/util/unwind-libdw.c b/tools/perf/util/unwind-libdw.c
index 94aa40f6e348..1915c9769dbe 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,
 				      al->map->start - al->map->pgoff, false);
+	}
 	if (!mod) {
 		char filename[PATH_MAX];