perf annotate: Use build-ids to find the right DSO

[linux-2.6-block.git] / tools / perf / util / build-id.c

diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c
index 0f60a39068086b9949ee4aa03b94de2bdc5ea439..70c5cf87d020d9d44750da480face3820d2ded15 100644 (file)
--- a/tools/perf/util/build-id.c
+++ b/tools/perf/util/build-id.c
@@ -6,6 +6,8 @@
  * Copyright (C) 2009, 2010 Red Hat Inc.
  * Copyright (C) 2009, 2010 Arnaldo Carvalho de Melo <acme@redhat.com>
  */
+#include "util.h"
+#include <stdio.h>
 #include "build-id.h"
 #include "event.h"
 #include "symbol.h"
@@ -37,3 +39,23 @@ struct perf_event_ops build_id__mark_dso_hit_ops = {
        .mmap   = event__process_mmap,
        .fork   = event__process_task,
 };
+
+char *dso__build_id_filename(struct dso *self, char *bf, size_t size)
+{
+       char build_id_hex[BUILD_ID_SIZE * 2 + 1];
+       const char *home;
+
+       if (!self->has_build_id)
+               return NULL;
+
+       build_id__sprintf(self->build_id, sizeof(self->build_id), build_id_hex);
+       home = getenv("HOME");
+       if (bf == NULL) {
+               if (asprintf(&bf, "%s/%s/.build-id/%.2s/%s", home,
+                            DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2) < 0)
+                       return NULL;
+       } else
+               snprintf(bf, size, "%s/%s/.build-id/%.2s/%s", home,
+                        DEBUG_CACHE_DIR, build_id_hex, build_id_hex + 2);
+       return bf;
+}