From: Kan Liang <kan.li...@intel.com>
New function to compare the build_ids between different DSOs
This function is only interested in the common part of build_ids.
For example, dsos_a includes DSO A and DSO B. dsos_b includes DSO B and
DSO C. Only DSO B's build_id will be compared.
Signed-off-by: Kan Liang <kan.li...@intel.com>
---
Changes since V5:
- Replace Arnaldo's dsos__build_ids_equal by bool dsos__build_ids_common_equal
- Only compare the common part of build-ids
tools/perf/util/dso.c | 20 ++++++++++++++++++++
tools/perf/util/dso.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 45be944..04416b9 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1087,3 +1087,23 @@ enum dso_type dso__type(struct dso *dso, struct machine
*machine)
return dso__type_fd(fd);
}
+
+bool dsos__build_ids_common_equal(struct dsos *dsos_a, struct dsos *dsos_b)
+{
+ struct dso *dso_a, *dso_b;
+
+ list_for_each_entry(dso_a, &dsos_a->head, node) {
+ dso_b = dsos__find(dsos_b, dso_a->short_name, true);
+ if (dso_b == NULL)
+ continue;
+ /*
+ * Only compare the common part of dsos.
+ */
+ if (dso_a->has_build_id && dso_b->has_build_id) {
+ if (memcmp(dso_a->build_id, dso_b->build_id,
sizeof(dso_a->build_id)))
+ return false;
+ }
+ }
+
+ return true;
+}
diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
index 3782c82..e92217c 100644
--- a/tools/perf/util/dso.h
+++ b/tools/perf/util/dso.h
@@ -278,4 +278,6 @@ void dso__free_a2l(struct dso *dso);
enum dso_type dso__type(struct dso *dso, struct machine *machine);
+bool dsos__build_ids_common_equal(struct dsos *dsos_a, struct dsos *dsos_b);
+
#endif /* __PERF_DSO */
--
1.8.3.2
--
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