* ext/objspace/object_tracing.c: Add experimental methods to dump

objectspace as json: ObjectSpace.dump_all and ObjectSpace.dump(obj).
These methods are useful for debugging reference leaks and memory growth
in large ruby applications. [Bug #9026] [ruby-core:57893] [Fixes GH-423]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43585 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 27 insertions, 0 deletions

diff --git a/test/objspace/test_objspace.rb b/test/objspace/test_objspace.rb
index 5a0660ed52..aec4572044 100644
--- a/test/objspace/test_objspace.rb
+++ b/test/objspace/test_objspace.rb
@@ -203,4 +203,31 @@ class TestObjSpace < Test::Unit::TestCase
       end;
     end
   end
+
+  def test_dump
+    info = nil
+    ObjectSpace.trace_object_allocations do
+      str = "hello world"
+      info = ObjectSpace.dump(str)
+    end
+
+    assert_match /"type":"STRING"/, info
+    assert_match /"embedded":true, "bytesize":11, "value":"hello world", "encoding":"UTF-8"/, info
+    assert_match /"file":"#{Regexp.escape __FILE__}", "line":#{__LINE__-6}/, info
+    assert_match /"method":"test_dump"/, info
+  end
+
+  def test_dump_all
+    entry = /"value":"this is a test string", "encoding":"UTF-8", "file":"-", "line":4, "method":"dump_my_heap_please"/
+    assert_in_out_err(%w[-robjspace], <<-'end;', entry)
+      def dump_my_heap_please
+        ObjectSpace.trace_object_allocations_start
+        GC.start
+        "this is a test string".force_encoding("UTF-8")
+        ObjectSpace.dump_all(output: :stdout)
+      end
+
+      dump_my_heap_please
+    end;
+  end
 end