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Автор SHA1 Сообщение Дата
卜部昌平 4ff3f20540 add #include guard hack
According to MSVC manual (*1), cl.exe can skip including a header file
when that:

- contains #pragma once, or
- starts with #ifndef, or
- starts with #if ! defined.

GCC has a similar trick (*2), but it acts more stricter (e. g. there
must be _no tokens_ outside of #ifndef...#endif).

Sun C lacked #pragma once for a looong time.  Oracle Developer Studio
12.5 finally implemented it, but we cannot assume such recent version.

This changeset modifies header files so that each of them include
strictly one #ifndef...#endif.  I believe this is the most portable way
to trigger compiler optimizations. [Bug #16770]

*1: https://docs.microsoft.com/en-us/cpp/preprocessor/once
*2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
2020-04-13 16:06:00 +09:00
Koichi Sasada b9007b6c54 Introduce disposable call-cache.
This patch contains several ideas:

(1) Disposable inline method cache (IMC) for race-free inline method cache
    * Making call-cache (CC) as a RVALUE (GC target object) and allocate new
      CC on cache miss.
    * This technique allows race-free access from parallel processing
      elements like RCU.
(2) Introduce per-Class method cache (pCMC)
    * Instead of fixed-size global method cache (GMC), pCMC allows flexible
      cache size.
    * Caching CCs reduces CC allocation and allow sharing CC's fast-path
      between same call-info (CI) call-sites.
(3) Invalidate an inline method cache by invalidating corresponding method
    entries (MEs)
    * Instead of using class serials, we set "invalidated" flag for method
      entry itself to represent cache invalidation.
    * Compare with using class serials, the impact of method modification
      (add/overwrite/delete) is small.
    * Updating class serials invalidate all method caches of the class and
      sub-classes.
    * Proposed approach only invalidate the method cache of only one ME.

See [Feature #16614] for more details.
2020-02-22 09:58:59 +09:00
卜部昌平 5e22f873ed decouple internal.h headers
Saves comitters' daily life by avoid #include-ing everything from
internal.h to make each file do so instead.  This would significantly
speed up incremental builds.

We take the following inclusion order in this changeset:

1.  "ruby/config.h", where _GNU_SOURCE is defined (must be the very
    first thing among everything).
2.  RUBY_EXTCONF_H if any.
3.  Standard C headers, sorted alphabetically.
4.  Other system headers, maybe guarded by #ifdef
5.  Everything else, sorted alphabetically.

Exceptions are those win32-related headers, which tend not be self-
containing (headers have inclusion order dependencies).
2019-12-26 20:45:12 +09:00
卜部昌平 f054f11a38 per-method serial number
Methods and their definitions can be allocated/deallocated on-the-fly.
One pathological situation is when a method is deallocated then another
one is allocated immediately after that.  Address of those old/new method
entries/definitions can be the same then, depending on underlying
malloc/free implementation.

So pointer comparison is insufficient.  We have to check the contents.
To do so we introduce def->method_serial, which is an integer unique to
that specific method definition.

PS: Note that method_serial being uintptr_t rather than rb_serial_t is
intentional.  This is because rb_serial_t can be bigger than a pointer
on a 32bit system (rb_serial_t is at least 64bit).  In order to preserve
old packing of struct rb_call_cache, rb_serial_t is inappropriate.
2019-12-18 12:52:28 +09:00
卜部昌平 0e8219f591 make functions static
These functions are used from within a compilation unit so we can
make them static, for better binary size.  This changeset reduces
the size of generated ruby binary from 26,590,128 bytes to
26,584,472 bytes on my macihne.
2019-11-19 12:36:19 +09:00
卜部昌平 c9ffe751d1 delete unused functions
Looking at the list of symbols inside of libruby-static.a, I found
hundreds of functions that are defined, but used from nowhere.

There can be reasons for each of them (e.g. some functions are
specific to some platform, some are useful when debugging, etc).
However it seems the functions deleted here exist for no reason.

This changeset reduces the size of ruby binary from 26,671,456
bytes to 26,592,864 bytes on my machine.
2019-11-14 20:35:48 +09:00
git 7e060d5018 * expand tabs. [ci skip]
Tabs were expanded because previously the file did not have any tab indentation.
Please update your editor config, and use misc/expand_tabs.rb in the pre-commit hook.
2019-10-03 12:48:20 +09:00
卜部昌平 eb92159d72 Revert https://github.com/ruby/ruby/pull/2486
This reverts commits: 10d6a3aca7 8ba48c1b85 fba8627dc1 dd883de5ba
6c6a25feca 167e6b48f1 7cb96d41a5 3207979278 595b3c4fdd 1521f7cf89
c11c5e69ac cf33608203 3632a812c0 f56506be0d 86427a3219 .

The reason for the revert is that we observe ABA problem around
inline method cache.  When a cache misshits, we search for a
method entry.  And if the entry is identical to what was cached
before, we reuse the cache.  But the commits we are reverting here
introduced situations where a method entry is freed, then the
identical memory region is used for another method entry.  An
inline method cache cannot detect that ABA.

Here is a code that reproduce such situation:

```ruby
require 'prime'

class << Integer
  alias org_sqrt sqrt
  def sqrt(n)
    raise
  end

  GC.stress = true
  Prime.each(7*37){} rescue nil # <- Here we populate CC
  class << Object.new; end

  # These adjacent remove-then-alias maneuver
  # frees a method entry, then immediately
  # reuses it for another.
  remove_method :sqrt
  alias sqrt org_sqrt
end

Prime.each(7*37).to_a # <- SEGV
```
2019-10-03 12:45:24 +09:00
卜部昌平 dd883de5ba refactor constify most of rb_method_entry_t
Now that we have eliminated most destructive operations over the
rb_method_entry_t / rb_callable_method_entry_t, let's make them
mostly immutabe and mark them const.

One exception is rb_export_method(), which destructively modifies
visibilities of method entries.  I have left that operation as is
because I suspect that destructiveness is the nature of that
function.
2019-09-30 10:26:38 +09:00
卜部昌平 6c6a25feca refactor add rb_method_entry_from_template
Tired of rb_method_entry_create(..., rb_method_definition_create(
..., &(rb_method_foo_t) {...})) maneuver.  Provide a function that
does the thing to reduce copy&paste.
2019-09-30 10:26:38 +09:00
卜部昌平 7cb96d41a5 refactor delete rb_method_entry_copy
The deleted function was to destructively overwrite existing method
entries, which is now considered to be a bad idea.  Delete it, and
assign a newly created method entry instead.
2019-09-30 10:26:38 +09:00
卜部昌平 cf33608203 refactor constify most of rb_method_definition_t
Most (if not all) of the fields of rb_method_definition_t are never
meant to be modified once after they are stored.  Marking them const
makes it possible for compilers to warn on unintended modifications.
2019-09-30 10:26:38 +09:00
卜部昌平 86427a3219 refactor delete METHOD_ENTRY_COMPLEMENTED flag
Because rb_method_definition_t tracks its own complemented_count,
we no longer have to check it in rb_method_entry_t side.
2019-09-30 10:26:38 +09:00
Nobuyoshi Nakada 11f3da8e9d
Stop packing rb_method_definition_t
By using `BITFIELD`, `type` field should not be forced to align.
2019-07-23 05:20:04 +09:00
Nobuyoshi Nakada d2f663d6f1
STATIC_ASSERT for VM_METHOD_TYPE_MINIMUM_BITS 2019-05-31 10:55:38 +09:00
tenderlove 91793b8967 Add `GC.compact` again.
🙏

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67620 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-20 01:19:47 +00:00
tenderlove 744e5df715 Reverting compaction for now
For some reason symbols (or classes) are being overridden in trunk

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67598 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-17 09:41:41 +00:00
tenderlove 3c55b643ae Adding `GC.compact` and compacting GC support.
This commit adds the new method `GC.compact` and compacting GC support.
Please see this issue for caveats:

  https://bugs.ruby-lang.org/issues/15626

[Feature #15626]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67576 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-17 03:17:25 +00:00
kazu 25c1fd3b90 Reverting all commits from r67479 to r67496 because of CI failures
Because hard to specify commits related to r67479 only.
So please commit again.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67499 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-10 09:15:21 +00:00
tenderlove 3ef4db15e9 Adding `GC.compact` and compacting GC support.
This commit adds the new method `GC.compact` and compacting GC support.
Please see this issue for caveats:

  https://bugs.ruby-lang.org/issues/15626

[Feature #15626]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67479 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-09 20:32:04 +00:00
ko1 b2311c6767 `rb_add_method` is void function.
* method.h (rb_add_method): make it void function because
  nobody use a return value.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67444 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-04-05 08:41:04 +00:00
ko1 b1c1ee7183 change `cfunc->invoker` type for opt.
* vm_insnhelper.c: change `call_cfunc_*` parameters order
  and specify a function type for the passed func ptr.
  This fix reduce the number of asm instructions, such as:
    # before this patch
    0000000000000110 <call_cfunc_0>:
     110:       48 89 fa                mov    %rdi,%rdx
     113:       31 c0                   xor    %eax,%eax
     115:       48 89 f7                mov    %rsi,%rdi
     118:       ff e2                   jmpq   *%rdx
     11a:       66 0f 1f 44 00 00       nopw   0x0(%rax,%rax,1)

    # after this patch
    0000000000000110 <call_cfunc_0>:
     110:       ff e1                   jmpq   *%rcx

  However, this kind of instruction reduction doesn't affect
  any performance because of great CPU architectures :p


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67122 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-02-22 07:25:51 +00:00
nobu 2a4c87dc31 Add refinements support to method/instance_method.
[Fix GH-2034]

From: manga_osyo <manga.osyo@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66935 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2019-01-28 11:45:21 +00:00
nobu 188b673973 Enable refinements on symbol-proc in ruby-level methods
* vm_args.c (refine_sym_proc_call): resolve refinements when the
  proc is invoked, instead of resolving at making the proc, to
  enable refinements on symbol-proc in ruby-level methods

* vm.c (vm_cref_dup): clear cached symbol-procs when duplicating.

[Bug #15114] [Fix GH-2039]

From: manga_osyo <manga.osyo@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66439 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-18 13:59:46 +00:00
mrkn 242ce4b1d3 Revert "Symbol refinements"
Due to assertion failures when VM_CHECK_MODE >= 2.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66182 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-04 04:22:08 +00:00
mrkn 01b20daa86 Symbol refinements
* vm_args.c (refine_sym_proc_call): enalbe accidentally disabled
  refinements in Symbol#to_proc.   [Bug #15114]

From: osyo (manga osyo) <manga.osyo@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66181 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-04 04:22:06 +00:00
nobu 4d1e32eac6 Revert "Symbol refinements"
Due to assertion failures when VM_CHECK_MODE >= 2.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66155 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-03 08:51:29 +00:00
nobu b94e344b9d Symbol refinements
* vm_args.c (refine_sym_proc_call): enalbe accidentally disabled
  refinements in Symbol#to_proc.   [Bug #15114]

From: osyo (manga osyo) <manga.osyo@gmail.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66151 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-03 04:44:34 +00:00
nobu 1a1dd5ccf4 Revert "Symbol refinements [Bug #15114]"
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66150 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-03 04:44:33 +00:00
nobu cd5b309575 Symbol refinements [Bug #15114]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66149 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-12-03 04:34:27 +00:00
ko1 96990203b7 Support targetting TracePoint [Feature #15289]
* vm_trace.c (rb_tracepoint_enable_for_target): support targetting
  TracePoint. [Feature #15289]

  Tragetting TracePoint is only enabled on specified method, proc
  and so on, example: `tp.enable(target: code)`.

  `code` should be consisted of InstructionSeuqnece (iseq)
  (RubyVM::InstructionSeuqnece.of(code) should not return nil)
  If code is a tree of iseq, TracePoint is enabled on all of
  iseqs in a tree.

  Enabled tragetting TracePoints can not enabled again with
  and without target.

* vm_core.h (rb_iseq_t): introduce `rb_iseq_t::local_hooks`
  to store local hooks.
  `rb_iseq_t::aux::trace_events` is renamed to
  `global_trace_events` to contrast with `local_hooks`.

* vm_core.h (rb_hook_list_t): add `rb_hook_list_t::running`
  to represent how many Threads/Fibers are used this list.
  If this field is 0, nobody using this hooks and we can
  delete it.

  This is why we can remove code from cont.c.

* vm_core.h (rb_vm_t): because of above change, we can eliminate
  `rb_vm_t::trace_running` field.
  Also renamed from `rb_vm_t::event_hooks` to `global_hooks`.

* vm_core.h, vm.c (ruby_vm_event_enabled_global_flags): renamed
  from `ruby_vm_event_enabled_flags.

* vm_core.h, vm.c (ruby_vm_event_local_num): added to count
  enabled targetting TracePoints.

* vm_core.h, vm_trace.c (rb_exec_event_hooks): accepts
  hook list.

* vm_core.h (rb_vm_global_hooks): added for convinience.

* method.h (rb_method_bmethod_t): added to maintain Proc
  and `rb_hook_list_t` for bmethod (defined by define_method).

* prelude.rb (TracePoint#enable): extracet a keyword parameter
  (because it is easy than writing in C).
  It calls `TracePoint#__enable` internal method written in C.

* vm_insnhelper.c (vm_trace): check also iseq->local_hooks.

* vm.c (invoke_bmethod): check def->body.bmethod.hooks.

* vm.c (hook_before_rewind): check iseq->local_hooks
  and def->body.bmethod.hooks before rewind by exception.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66003 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-11-26 18:16:39 +00:00
kazu 84fd997fe6 Avoid compiler depend error
ref r64492

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64503 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-08-22 04:04:06 +00:00
mame cd0fec3728 Add TracePoint#parameters
It can be used to get the parameters' information of method and block.
There was no way to get block parameters.
It was possible but ineffective to get method parameters via Method
object: `tp.defined_class.method(tp.method_id).parameters`
TracePoint#parameters allows us to get the information easily.
[Feature #14694]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63562 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-06-03 05:10:41 +00:00
nobu 2e12695929 method.h: VM_METHOD_TYPE_MINIMUM_BITS
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62080 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-28 14:16:48 +00:00
nobu e47da4ddf3 method.h: BITFIELD in rb_method_definition_t
* method.h (rb_method_definition_struct): use BITFIELD for
  rb_method_type_t.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62078 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-28 10:35:28 +00:00
normal 46bfa65fcc internal.h: add BITFIELD macro to aid C99 users
I plan to use this macro to pack other enums in the VM.

* internal.h: add BITFIELD macro
* method.h: use BITFIELD for rb_method_visibility_t
  [ruby-core:85074] [Misc #14395]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62077 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-27 21:04:42 +00:00
ko1 7fd1183467 Speedup `block.call` [Feature #14330]
* insns.def (getblockparamproxy): introduce new instruction to return
  the `rb_block_param_proxy` object if possible. This object responds
  to `call` method and invoke given block (completely similar to `yield`).

* method.h (OPTIMIZED_METHOD_TYPE_BLOCK_CALL): add new optimized call type
  which is for `rb_block_param_proxy.cal`.

* vm_insnhelper.c (vm_call_method_each_type): ditto.

* vm_insnhelper.c (vm_call_opt_block_call): ditto.

* vm_core.h (BOP_CALL, PROC_REDEFINED_OP_FLAG): add check for `Proc#call`
  redefinition.

* compile.c (iseq_compile_each0): compile to use new insn
  `getblockparamproxy` for method call.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61659 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-07 19:18:49 +00:00
shyouhei db5d556f9b bit-fields other than int is a C99ism
To be precise C90 says "A bit-field may have type int, unsigned
int, or signed int". It is clear that char or enum are NG.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61554 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2018-01-02 06:41:50 +00:00
mame a5e02f249d vm_core.h (rb_iseq_locatoin_t): add a field `code_range`
This change makes each ISeq keep NODE's code range.  This information is
needed for method coverage.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61025 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-12-05 08:56:50 +00:00
mame 0a6816ecd7 Revamp method coverage to support define_method
Traditionally, method coverage measurement was implemented by inserting
`trace2` instruction to the head of method iseq.  So, it just measured
methods defined by `def` keyword.

This commit drastically changes the measuring mechanism of method
coverage; at `RUBY_EVENT_CALL`, it keeps a hash from rb_method_entry_t*
to runs (i.e., it counts the runs per method entry), and at
`Coverage.result`, it creates the result hash by enumerating all
`rb_method_entry_t*` objects (by `ObjectSpace.each_object`).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61023 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-12-05 07:16:42 +00:00
ko1 b453fc2cb9 make a func static.
* vm_method.c (rb_resolve_refined_method_callable): make it static.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60808 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-11-16 08:53:49 +00:00
ko1 8184cb2bc7 remove unused function.
* vm_method.c (rb_method_entry_with_refinements): removed.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60801 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-11-16 07:46:05 +00:00
sonots 47dd9bf7d8 Add doxygen comments
* include/ruby/ruby.h (enum ruby_value_type): add doxygen comments
* internal.h (enum imemo_type, struct vm_svar): add doxygen comments
* method.h (rb_method_type_t, rb_method_iseq_t): add doxygen comments

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60285 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-10-21 14:31:21 +00:00
nobu a15028bc38 proc.c: super_method of included method
* proc.c (method_super_method): search the next super method along
  the included ancestor chain.  [ruby-core:83114] [Bug #13973]

* vm_method.c (rb_callable_method_entry_without_refinements):
  return the defined class.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60127 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-10-06 05:55:11 +00:00
nobu 5c28ff6c41 Revert r59612
* method.h (rb_method_definition_t): rb_method_type_t should be
  unsigned as it needs 5bits at least for signed extension.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59616 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-08-17 23:31:41 +00:00
nobu 3fa2183614 method.h: enum rb_method_definition_t::type
* method.h (rb_method_definition_t): define type as an enum for
  debugging.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59612 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-08-17 14:36:57 +00:00
ko1 37da94857a specify unsigned (fix r58784).
* method.h (rb_method_definition_t#type): specify unsigned explicitly.
 Some compilers (includes VC) returns negative value.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58788 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-05-19 07:54:04 +00:00
normal f82a930490 method.h: pack rb_method_definition_t struct
We only have 12 method types, so 4 bits is enough for
rb_method_type_t.

Size reductions:

- x86-64     48 => 40 bytes
- x86        28 => 24 bytes

* method.h (enum method_optimized_type): split out for CPP
  (struct rb_method_definition struct): pack on unaligned systems
  (rb_method_definition_t): split typedef to help ctags
  [ruby-core:81236] [Feature #13494]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2017-05-19 06:00:53 +00:00
ktsj 8004ad33bc * eval.c, method.h, proc.c, vm.c, vm_eval.c, vm_insnhelper.c, vm_method.c:
TracePoint#method_id should return method_id, not callee_id.
  [ruby-core:77241] [Feature #12747]

* test/ruby/test_settracefunc.rb: change accordingly.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56592 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2016-11-05 13:15:26 +00:00
ko1 3f7c0e9fd5 * method.h: introduce the folliwing field and macros.
* rb_method_definition_t::complemented_count to count shared method
    entries because of complemented method entries and separate from
    alias_count.

    Shared `def' only by complemented method entries should not prevent
    method re-definition warning.

  * METHOD_ENTRY_COMPLEMENTED(me) to represent complemented method entry.
  * METHOD_ENTRY_COMPLEMENTED_SET(me) to check it as  complemented me.

* vm_insnhelper.c (aliased_callable_method_entry): should also
  check me->def->complemented_count.

* vm_method.c (method_definition_addref_complement): add to count
  complemented method entries number.

* vm_method.c (rb_method_definition_release): release `def' iff
  alias_count == 0 and complemented_count == 0.

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




git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52636 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2015-11-18 08:15:51 +00:00