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-rw-r--r--tools/perf/util/dsos.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/perf/util/dsos.c b/tools/perf/util/dsos.c
index 3ea80d203587..ecf8d7346685 100644
--- a/tools/perf/util/dsos.c
+++ b/tools/perf/util/dsos.c
@@ -2,6 +2,7 @@
#include "debug.h"
#include "dsos.h"
#include "dso.h"
+#include "map.h"
#include "vdso.h"
#include "namespaces.h"
#include <libgen.h>
@@ -9,6 +10,30 @@
#include <string.h>
#include <symbol.h> // filename__read_build_id
+int dso_id__cmp(struct dso_id *a, struct dso_id *b)
+{
+ /*
+ * The second is always dso->id, so zeroes if not set, assume passing
+ * NULL for a means a zeroed id
+ */
+ if (a == NULL)
+ return 0;
+
+ if (a->maj > b->maj) return -1;
+ if (a->maj < b->maj) return 1;
+
+ if (a->min > b->min) return -1;
+ if (a->min < b->min) return 1;
+
+ if (a->ino > b->ino) return -1;
+ if (a->ino < b->ino) return 1;
+
+ if (a->ino_generation > b->ino_generation) return -1;
+ if (a->ino_generation < b->ino_generation) return 1;
+
+ return 0;
+}
+
bool __dsos__read_build_ids(struct list_head *head, bool with_hits)
{
bool have_build_id = false;
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