[PATCH 18/41] perf tools: Record whether a dso has data

[Adrian Hunter]

Add 'data_status' to record whether a dso has data
(i.e. an object file) as follows:

	dso->data_status	meaning
	----------------------------------
	0			don't know
	-1			no data
	1			has data

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
---
 tools/perf/util/dso.c | 5 ++++-
 tools/perf/util/dso.h | 1 +
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index fc006fe..91a4eb4 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -556,8 +556,11 @@ static ssize_t data_read_offset(struct dso *dso, u64 offset,
 ssize_t dso__data_read_offset(struct dso *dso, struct machine *machine,
 			      u64 offset, u8 *data, ssize_t size)
 {
-	if (dso__data_fd(dso, machine) < 0)
+	if (dso__data_fd(dso, machine) < 0) {
+		dso->data.data_status = -1;
 		return -1;
+	}
+	dso->data.data_status = 1;
 
 	return data_read_offset(dso, offset, data, size);
 }
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index c239e86..c5257aa 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -104,6 +104,7 @@ struct dso {
 	struct {
 		struct rb_root	 cache;
 		int		 fd;
+		int		 data_status;
 		size_t		 file_size;
 		struct list_head open_entry;
 	} data;
-- 
1.8.3.2

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