* parse.y: support Symbol GC. [ruby-trunk Feature #9634]

  See this ticket about Symbol GC.

* include/ruby/ruby.h:
  Declare few functions.
  * rb_sym2id: almost same as old SYM2ID but support dynamic symbols.
  * rb_id2sym: almost same as old ID2SYM but support dynamic symbols.
  * rb_sym2str: almost same as `rb_id2str(SYM2ID(sym))` but not
    pin down a dynamic symbol.
  Declare a new struct.
  * struct RSymbol: represents a dynamic symbol as object in
    Ruby's heaps.
  Add few macros.
  * STATIC_SYM_P: check a static symbol.
  * DYNAMIC_SYM_P: check a dynamic symbol.
  * RSYMBOL: cast to RSymbol

* gc.c: declare RSymbol. support T_SYMBOL.

* internal.h: Declare few functions.
  * rb_gc_free_dsymbol: free up a dynamic symbol. GC call this
    function at a sweep phase.
  * rb_str_dynamic_intern: convert a string to a dynamic symbol.
  * rb_check_id_without_pindown: not pinning function.
  * rb_sym2id_without_pindown: ditto.
  * rb_check_id_cstr_without_pindown: ditto.

* string.c (Init_String): String#intern and String#to_sym use
  rb_str_dynamic_intern.

* template/id.h.tmpl: use LSB of ID as a flag for determining a
  static symbol, so we shift left other ruby_id_types.

* string.c: use rb_sym2str instead `rb_id2str(SYM2ID(sym))` to
  avoid pinning.

* load.c: use xx_without_pindown function at creating temporary ID
  to avoid pinning.

* object.c: ditto.

* sprintf.c: ditto.

* struct.c: ditto.

* thread.c: ditto.

* variable.c: ditto.

* vm_method.c: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45426 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 4 insertions, 4 deletions

diff --git a/variable.c b/variable.c
index 079f862797..292b084011 100644
--- a/variable.c
+++ b/variable.c
@@ -353,7 +353,7 @@ rb_path_to_class(VALUE pathname)
     }
     while (*p) {
 	while (*p && *p != ':') p++;
-	id = rb_check_id_cstr(pbeg, p-pbeg, enc);
+	id = rb_check_id_cstr_without_pindown(pbeg, p-pbeg, enc);
 	if (p[0] == ':') {
 	    if (p[1] != ':') goto undefined_class;
 	    p += 2;
@@ -1403,7 +1403,7 @@ VALUE
 rb_obj_remove_instance_variable(VALUE obj, VALUE name)
 {
     VALUE val = Qnil;
-    const ID id = rb_check_id(&name);
+    const ID id = rb_check_id_without_pindown(&name);
     st_data_t n, v;
     struct st_table *iv_index_tbl;
     st_data_t index;
@@ -1919,7 +1919,7 @@ rb_public_const_get_at(VALUE klass, ID id)
 VALUE
 rb_mod_remove_const(VALUE mod, VALUE name)
 {
-    const ID id = rb_check_id(&name);
+    const ID id = rb_check_id_without_pindown(&name);
 
     if (!id) {
 	if (rb_is_const_name(name)) {
@@ -2568,7 +2568,7 @@ rb_mod_class_variables(int argc, VALUE *argv, VALUE mod)
 VALUE
 rb_mod_remove_cvar(VALUE mod, VALUE name)
 {
-    const ID id = rb_check_id(&name);
+    const ID id = rb_check_id_without_pindown(&name);
     st_data_t val, n = id;
 
     if (!id) {