marshal.c: skip internal names

* marshal.c (w_objivar): skip internal instance variables in
  T_OBJECT too.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52940 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Tue Dec  8 14:20:38 2015  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* marshal.c (w_objivar): skip internal instance variables in
+	  T_OBJECT too.
+
 Tue Dec  8 12:58:04 2015  Naohisa Goto  <ngotogenome@gmail.com>
 
 	* test/io/console/test_io_console.rb (test_getpass): s.getpass

ext/-test-/marshal/internal_ivar/extconf.rb

@@ -0,0 +1 @@
+create_makefile("-test-/marshal/internal_ivar")

ext/-test-/marshal/internal_ivar/internal_ivar.c

@@ -0,0 +1,39 @@
+#include <ruby.h>
+
+static ID id_normal_ivar, id_internal_ivar;
+
+static VALUE
+init(VALUE self, VALUE arg1, VALUE arg2)
+{
+    rb_ivar_set(self, id_normal_ivar, arg1);
+    rb_ivar_set(self, id_internal_ivar, arg2);
+    return self;
+}
+
+static VALUE
+get_normal(VALUE self)
+{
+    return rb_attr_get(self, id_normal_ivar);
+}
+
+static VALUE
+get_internal(VALUE self)
+{
+    return rb_attr_get(self, id_internal_ivar);
+}
+
+void
+Init_internal_ivar(void)
+{
+    VALUE mMarshal = rb_define_module_under(rb_define_module("Bug"), "Marshal");
+    VALUE newclass = rb_define_class_under(mMarshal, "InternalIVar", rb_cObject);
+
+    id_normal_ivar = rb_intern_const("normal");
+#if 0
+    /* leave id_internal_ivar being 0 */
+    id_internal_ivar = rb_make_internal_id();
+#endif
+    rb_define_method(newclass, "initialize", init, 2);
+    rb_define_method(newclass, "normal", get_normal, 0);
+    rb_define_method(newclass, "internal", get_internal, 0);
+}

marshal.c

@@ -637,16 +637,9 @@ w_ivar(st_index_t num, VALUE ivobj, VALUE encname, struct dump_call_arg *arg)
 static void
 w_objivar(VALUE obj, struct dump_call_arg *arg)
 {
-    VALUE *ptr;
+    st_data_t num = 0;
-    long i, len, num;
-
-    len = ROBJECT_NUMIV(obj);
-    ptr = ROBJECT_IVPTR(obj);
-    num = 0;
-    for (i = 0; i < len; i++)
-        if (ptr[i] != Qundef)
-            num += 1;
 
+    rb_ivar_foreach(obj, obj_count_ivars, (st_data_t)&num);
     w_long(num, arg->arg);
     if (num != 0) {
         rb_ivar_foreach(obj, w_obj_each, (st_data_t)arg);

test/-ext-/marshal/test_internal_ivar.rb

@@ -0,0 +1,19 @@
+require 'test/unit'
+require '-test-/marshal/internal_ivar'
+
+module Bug end
+
+module Bug::Marshal
+  class TestInternalIVar < Test::Unit::TestCase
+    def test_marshal
+      v = InternalIVar.new("hello", "world")
+      assert_equal("hello", v.normal)
+      assert_equal("world", v.internal)
+      dump = ::Marshal.dump(v)
+      v = assert_nothing_raised {break ::Marshal.load(dump)}
+      assert_instance_of(InternalIVar, v)
+      assert_equal("hello", v.normal)
+      assert_nil(v.internal)
+    end
+  end
+end