variable.c: generic_iv_tbl is unavoidable

Even miniruby creates one generic ivar (plain "ruby" creates 9),
so there's no point in lazily allocating the table.

I dumped generic ivar counts with the following trivial patch:

  --- a/variable.c
  +++ b/variable.c
  @@ -24,6 +24,10 @@ static void check_before_mod_set(VALUE, ID, VALUE, const char *);
   static void setup_const_entry(rb_const_entry_t *, VALUE, VALUE, rb_const_flag_t);
   static int const_update(st_data_t *, st_data_t *, st_data_t, int);
   static st_table *generic_iv_tbl;
  +__attribute__((destructor)) static void count_genivar(void)
  +{
  +    fprintf(stderr, "genivars: %zu\n", (size_t)generic_iv_tbl->num_entries);
  +}

   void
   Init_var_tables(void)

* variable.c (Init_var_tables): init generic_iv_tbl
  (rb_generic_ivar_table, generic_ivar_get, generic_ivar_set,
   generic_ivar_defined, generic_ivar_remove,
   rb_mark_generic_ivar, givar_i, rb_mark_generic_ivar_tbl,
   rb_free_generic_ivar, rb_copy_generic_ivar, rb_ivar_foreach,
   rb_ivar_count): remove checks for uninitialize generic_iv_tbl
  [ruby-core:69155] [Feature #11146]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50569 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 10 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 8b12c474e5..2a7f7a1de2 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+Thu May 21 08:25:19 2015  Eric Wong  <e@80x24.org>
+
+	* variable.c (Init_var_tables): init generic_iv_tbl
+	  (rb_generic_ivar_table, generic_ivar_get, generic_ivar_set,
+	   generic_ivar_defined, generic_ivar_remove,
+	   rb_mark_generic_ivar, givar_i, rb_mark_generic_ivar_tbl,
+	   rb_free_generic_ivar, rb_copy_generic_ivar, rb_ivar_foreach,
+	   rb_ivar_count): remove checks for uninitialize generic_iv_tbl
+	[ruby-core:69155] [Feature #11146]
+
 Thu May 21 04:11:03 2015  Koichi Sasada  <ko1@atdot.net>
 
 	* iseq.c (exception_type2symbol): show correct bug message.