* ext/objspace/objspace.c: add a new method `reachable_objects_from_root'.

  ObjectSpace.reachable_objects_from_root returns all objects refered
  from root (called "root objects").
  This feature is for deep object analysis.
* test/objspace/test_objspace.rb: add a test.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43301 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 12 insertions, 0 deletions

diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 861e40e62b..5a0660ed52 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -97,6 +97,18 @@ class TestObjSpace < Test::Unit::TestCase
     eom
   end
 
+  def test_reachable_objects_from_root
+    root_objects = ObjectSpace.reachable_objects_from_root
+
+    assert_operator(root_objects.size, :>, 0)
+
+    root_objects.each{|category, objects|
+      assert_kind_of(String, category)
+      assert_kind_of(Array, objects)
+      assert_operator(objects.size, :>, 0)
+    }
+  end
+
   def test_reachable_objects_size
     assert_separately %w[--disable-gem -robjspace], __FILE__, __LINE__, <<-'eom'
     ObjectSpace.each_object{|o|