perf tools: Don't trow away old map slices not overlapped by new maps
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1267800842-22324-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/tools/perf/util/thread.c b/tools/perf/util/thread.c
index 21b9216..9024fa1 100644
--- a/tools/perf/util/thread.c
+++ b/tools/perf/util/thread.c
@@ -183,8 +183,8 @@
return th;
}
-static void map_groups__remove_overlappings(struct map_groups *self,
- struct map *map)
+static int map_groups__fixup_overlappings(struct map_groups *self,
+ struct map *map)
{
struct rb_root *root = &self->maps[map->type];
struct rb_node *next = rb_first(root);
@@ -209,7 +209,36 @@
* list.
*/
list_add_tail(&pos->node, &self->removed_maps[map->type]);
+ /*
+ * Now check if we need to create new maps for areas not
+ * overlapped by the new map:
+ */
+ if (map->start > pos->start) {
+ struct map *before = map__clone(pos);
+
+ if (before == NULL)
+ return -ENOMEM;
+
+ before->end = map->start - 1;
+ map_groups__insert(self, before);
+ if (verbose >= 2)
+ map__fprintf(before, stderr);
+ }
+
+ if (map->end < pos->end) {
+ struct map *after = map__clone(pos);
+
+ if (after == NULL)
+ return -ENOMEM;
+
+ after->start = map->end + 1;
+ map_groups__insert(self, after);
+ if (verbose >= 2)
+ map__fprintf(after, stderr);
+ }
}
+
+ return 0;
}
void maps__insert(struct rb_root *maps, struct map *map)
@@ -254,7 +283,7 @@
void thread__insert_map(struct thread *self, struct map *map)
{
- map_groups__remove_overlappings(&self->mg, map);
+ map_groups__fixup_overlappings(&self->mg, map);
map_groups__insert(&self->mg, map);
}