linux-kernel - [PATCH 2/2] perf annotate: Update dso binary type when try build-id

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Date: Wed, 24 Apr 2024 17:51:57 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH 2/2] perf annotate: Update dso binary type when try build-id

dso__disassemble_filename() tries to get the filename for objdump (or
capstone) using build-id.  But I found sometimes it didn't disassemble
some functions.  It turned out that those functions belong to a dso
which has no binary type set.  It seems it sets the binary type for some
special files only - like kernel (kallsyms or kcore) or BPF images.  And
there's a logic to skip dso with DSO_BINARY_TYPE__NOT_FOUND.

As it's checked the build-id cache linke, it should set the binary type
as DSO_BINARY_TYPE__BUILD_ID_CACHE.

Fixes: 873a83731f1c ("perf annotate: Skip DSOs not found")
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/disasm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/util/disasm.c b/tools/perf/util/disasm.c
index 412101f2cf2a..6d1125e687b7 100644
--- a/tools/perf/util/disasm.c
+++ b/tools/perf/util/disasm.c
@@ -1156,6 +1156,8 @@ static int dso__disassemble_filename(struct dso *dso, char *filename, size_t fil
 			}
 		}
 		mutex_unlock(&dso->lock);
+	} else if (dso->binary_type == DSO_BINARY_TYPE__NOT_FOUND) {
+		dso->binary_type = DSO_BINARY_TYPE__BUILD_ID_CACHE;
 	}

 	free(build_id_path);
-- 
2.44.0.769.g3c40516874-goog