perf annotate: Try chroot filename for objdump

Likewise, it should use a proper name in case the task runs under
chroot.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20220202070828.143303-5-namhyung@kernel.orgSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/annotate.c

@@ -33,6 +33,7 @@
 #include "string2.h"
 #include "util/event.h"
 #include "arch/common.h"
+#include "namespaces.h"
 #include <regex.h>
 #include <pthread.h>
 #include <linux/bitops.h>
@@ -1696,6 +1697,15 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
 		 * DSO is the same as when 'perf record' ran.
 		 */
 		__symbol__join_symfs(filename, filename_size, dso->long_name);
+
+		if (access(filename, R_OK) && errno == ENOENT && dso->nsinfo) {
+			char *new_name = filename_with_chroot(dso->nsinfo->pid,
+							      filename);
+			if (new_name) {
+				strlcpy(filename, new_name, filename_size);
+				free(new_name);
+			}
+		}
 	}
 
 	free(build_id_path);