compile.c (iseq_compile_each), insns.def (defineclass): change the
  meaning of the third operand of defineclass as follows:
    lower 3bits: the type of the defineclass
                   0 = class, 1 = singleton class, 2 = module
    4th bit: a flag represents whether the defineclass is scoped
               0 = not scoped (e.g., class Foo)
	       1 = scoped (e.g., class Bar::Baz)
    5th bit: a flag represents whether the superclass is specified
               0 = not specified (e.g., class Foo)
               1 = specified (e.g., class Bar < Foo)
  If the superclass is specified and is not a class, a TypeError
  should be raised.  [ruby-dev:46747] [Bug #7572]

* test/ruby/test_class.rb: related test.

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* compile.c (iseq_compile_each): count flip-flop state in local iseq
  not in each iseqs, so that the keys can be other than hidden
  strings.  [ruby-core:47253] [Bug #6899]
* vm_insnhelper.c (lep_svar_get, lep_svar_set, vm_getspecial): store
  flip-flop states in an array instead of a hash.
* iseq.c (set_relation): main iseq also can has local scope.

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  of the receiver in module_eval and instance_eval.

* eval.c (ruby_Init_refinement): undef Class#refine.

* eval.c (ruby_Init_refinement): remove Module#using.

* eval.c (ruby_Init_refinement): main.using should be private.

* eval.c (rb_mod_refine): the argument of Module#refine should not
  be a module.

* insns.def (defineclass): do not activate refinements in a class or
  module.

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  Operand unification technique enable to combine
  an instruction and specific operands and make new
  instruction.
* defs/opt_operand.def: add several configuration
  of operand unifications.
* insns.def: use `int' instead to suppress warning.



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  range.c: use prepared IDs.
  A patch from charliesome (Charlie Somerville).
  [Bug #7495]
* common.mk: add dependency to id.h.
* common.mk: replace ID_H_INCLUDES with id.h.



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  path without caching the computed path. Some classes are frozen, and
  will raise an exception without this.

* probes.d (cmethod-entry, cmethod-return): separate cmethods from
  regular methods to match set trace func.

* probes_helper.h: refactor macros.  Fix probes to avoid calling
  #inspect when profiling.

* insns.def: update for use with new macros.

* vm_eval.c: ditto

* vm_insnhelper.c: ditto

* test/dtrace/test_singleton_function.rb: fix test for new output.

* test/dtrace/test_cmethod.rb: test the cmethod probes.

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* vm_trace.c: add events
* :thread_begin - hook at thread beggining.
* :thead_end - hook at thread ending.
* :b_call - hook at block enter.
* :b_return - hook at block leave.
  This change slow down block invocation.
  Please try and give us feedback until 2.0 code freeze.
* include/ruby/ruby.h: ditto.
* compile.c (rb_iseq_compile_node): ditto.
* insns.def: ditto.
* thread.c: ditto.
* vm.c: ditto.
* include/ruby/debug.h: add a comment.
* test/ruby/test_settracefunc.rb: add a tests.



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* insns.def: ditto
* probes_helper.h: ditto
* test/dtrace/test_function_entry.rb: ditto
* test/dtrace/test_singleton_function.rb: ditto
* vm.c: ditto
* vm_eval.c: ditto
* vm_insnhelper.c: ditto

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  (1) TracePoint#return_value which returns return
  value on the :return and :c_return event.
  (2) TracePoint#raised_exception which returns raised exception
  value on the :raise event.
  Eeach methods raise RuntimeError if it is called at unsupported
  event.
  Please review and give us feedback until next preview
  release (Dec/2012) of Ruby 2.0.0.
* insns.def, vm.c, vm_eval.c, vm_insnhelper.c, eval.c, thread.c:
  ditto.
* vm_trace.c, vm_core.h: move definition of rb_trace_arg_t from
  vm_trace.c to vm_core.h.
  Caller fills rb_trace_arg_t and pass the pointer of this variable.
* test/ruby/test_settracefunc.rb: fix tests to test this change.



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* array.c (empty_ary_alloc, ary_new): added array create DTrace probe.

* compile.c (rb_insns_name): allowing DTrace probes to access
  instruction sequence name.

* Makefile.in: translate probes.d file to appropriate header file.

* common.mk: declare dependencies on the DTrace header.

* configure.in: add a test for existence of DTrace.

* eval.c (setup_exception): add a probe for when an exception is
  raised.

* gc.c: Add DTrace probes for mark begin and end, and sweep begin and
  end.

* hash.c (empty_hash_alloc): Add a probe for hash allocation.

* insns.def: Add probes for function entry and return.

* internal.h: function declaration for compile.c change.

* load.c (rb_f_load): add probes for `load` entry and exit, require
  entry and exit, and wrapping search_required for load path search.

* object.c (rb_obj_alloc): added a probe for general object creation.

* parse.y (yycompile0): added a probe around parse and compile phase.

* string.c (empty_str_alloc, str_new): DTrace probes for string
  allocation.

* test/dtrace/*: tests for DTrace probes.

* vm.c (vm_invoke_proc): add probes for function return on exception
  raise, hash create, and instruction sequence execution.

* vm_core.h: add probe declarations for function entry and exit.

* vm_dump.c: add probes header file.

* vm_eval.c (vm_call0_cfunc, vm_call0_cfunc_with_frame): add probe on
  function entry and return.

* vm_exec.c: expose instruction number to instruction name function.

* vm_insnshelper.c: add function entry and exit probes for cfunc
  methods.

* vm_insnhelper.h: vm usage information is always collected, so
  uncomment the functions.

12 19:14:50 2012  Akinori MUSHA  <knu@iDaemons.org>

* configure.in (isinf, isnan): isinf() and isnan() are macros on
  DragonFly which cannot be found by AC_REPLACE_FUNCS().  This
  workaround enforces the fact that they exist on DragonFly.

12 15:59:38 2012  Shugo Maeda  <shugo@ruby-lang.org>

* vm_core.h (rb_call_info_t::refinements), compile.c (new_callinfo),
  vm_insnhelper.c (vm_search_method): revert r37616 because it's too
  slow.  [ruby-dev:46477]

* test/ruby/test_refinement.rb (test_inline_method_cache): skip
  the test until the bug is fixed efficiently.

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