[Bug #12628]

  This patch introduce many changes.

  * Introduce concept of "Block Handler (BH)" to represent
    passed blocks.

  * move rb_control_frame_t::flag to ep[0] (as a special local
    variable). This flags represents not only frame type, but also
    env flags such as escaped.

  * rename `rb_block_t` to `struct rb_block`.

  * Make Proc, Binding and RubyVM::Env objects wb-protected.

  Check [Bug #12628] for more details.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55766 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* vm_eval.c (rb_eval_cmd): refactor to share common code, and
  suppress false maybe-uninitialized warnings by old gcc.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  and define CONSTFUNC and PUREFUNC if available.
  Note that I don't add those options as default because
  it still shows many false-positive (it seems not to consider
  longjmp).

* vm_eval.c (stack_check): get rb_thread_t* as an argument
  to avoid duplicate call of GET_THREAD().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54952 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* eval_error.c (rb_print_undef): Use `rb_method_visibility_t`
  instead of `int`.
* eval_intern.h (rb_print_undef): ditto
* proc.c (mnew_internal): ditto
* vm_method.c (rb_export_method): ditto
  [Misc #11649] [ruby-core:71311] [fix GH-1078]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53416 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

  CREFs should not be shared by methods between `using'.
  [Bug #11247]

* vm_insnhelper.c (vm_cref_replace_with_duplicated_cref): ditto.

* vm.c (vm_cref_dup): should copy refinements correctly.

* eval.c: use rb_vm_cref_replace_with_duplicated_cref().

* eval_intern.h: add a decl. of
  rb_vm_cref_replace_with_duplicated_cref().

* vm_eval.c (eval_string_with_cref): do not need to pass
  scope's CREF because VM can find out CREF from stack frames.

* test/ruby/test_refinement.rb: add a test.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52677 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* eval_intern.h: remove unused setter functions.
  CREF_CLASS_SET()
  CREF_NEXT_SET()
  CREF_SCOPE_VISI_COPY()

* eval_intern.h: rename flags:
  * NODE_FL_CREF_PUSHED_BY_EVAL_ -> CREF_FL_PUSHED_BY_EVAL
  * NODE_FL_CREF_OMOD_SHARED_ -> CREF_FL_OMOD_SHARED
  and use IMEMO_FL_USER1/2.

* vm.c (vm_cref_new): accept push_by_eval parameter.

* vm.c (vm_cref_new_use_prev): added for rb_vm_rewrite_cref().

* vm_insnhelper.c (vm_cref_push): accept pushed_by_eval parameter.

* vm_insnhelper.h: remove unused macros:
  COPY_CREF_OMOD() and COPY_CREF().

* vm_eval.c, insns.def: catch up this fix.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52564 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* eval_intern.h (CREF_SCOPE_VISI_COPY): catch up this fix.

* vm_method.c: ditto.




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52561 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* eval_intern.h (pass_passed_block): make helper inline function.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52039 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* compile.c (iseq_compile_each): use enum ruby_tag_type names.
* vm_core.h (ruby_tag_type): move from eval_intern.h for compiling
  break/next/redo/return.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51283 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

* eval_intern.h: move definition of rb_scope_visibility_t
  to method.h.
* method.h: change rb_cref_t::scope_visi from VALUE to
  rb_scope_visibility_t.
  [Bug #11219]
* vm.c (vm_cref_new): accept rb_method_visibility_t directly.
* vm_insnhelper.c (rb_vm_rewrite_cref): don't use 0,
  but METHOD_VISI_UNDEF.
* vm_method.c (rb_scope_visibility_set): don't need to use cast.
* vm_method.c (rb_scope_module_func_set): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@50782 b2dd03c8-39d4-4d8f-98ff-823fe69b080e