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This patch introduce M:N thread scheduler for Ractor system.
In general, M:N thread scheduler employs N native threads (OS threads)
to manage M user-level threads (Ruby threads in this case).
On the Ruby interpreter, 1 native thread is provided for 1 Ractor
and all Ruby threads are managed by the native thread.
From Ruby 1.9, the interpreter uses 1:1 thread scheduler which means
1 Ruby thread has 1 native thread. M:N scheduler change this strategy.
Because of compatibility issue (and stableness issue of the implementation)
main Ractor doesn't use M:N scheduler on default. On the other words,
threads on the main Ractor will be managed with 1:1 thread scheduler.
There are additional settings by environment variables:
`RUBY_MN_THREADS=1` enables M:N thread scheduler on the main ractor.
Note that non-main ractors use the M:N scheduler without this
configuration. With this configuration, single ractor applications
run threads on M:1 thread scheduler (green threads, user-level threads).
`RUBY_MAX_CPU=n` specifies maximum number of native threads for
M:N scheduler (default: 8).
This patch will be reverted soon if non-easy issues are found.
[Bug #19842]
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Notes:
Merged: https://github.com/ruby/ruby/pull/7310
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[Misc #18891]
Notes:
Merged: https://github.com/ruby/ruby/pull/6094
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Header file include/ruby/internal/abi.h contains RUBY_ABI_VERSION which
is the ABI version. This value should be bumped whenever an ABI
incompatible change is introduced.
When loading dynamic libraries, Ruby will compare its own
`ruby_abi_version` and the `ruby_abi_version` of the loaded library. If
these two values don't match it will raise a `LoadError`. This feature
can also be turned off by setting the environment variable
`RUBY_RUBY_ABI_CHECK=0`.
This feature will prevent cases where previously installed native gems
fail in unexpected ways due to incompatibility of changes in header
files. This will force the developer to recompile their gems to use the
same header files as the built Ruby.
In Ruby, the ABI version is exposed through
`RbConfig::CONFIG["ruby_abi_version"]`.
Notes:
Merged: https://github.com/ruby/ruby/pull/5474
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Must not be a bad idea to improve documents. [ci skip]
Notes:
Merged: https://github.com/ruby/ruby/pull/4815
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* See [Feature #17752]
Notes:
Merged: https://github.com/ruby/ruby/pull/4428
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a.out format is considered extinct nowadays.
Notes:
Merged: https://github.com/ruby/ruby/pull/4317
Merged-By: nobu <[email protected]>
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Only one function in only one file uses contents of this public header.
That is not a wise idea. Let's just free the header's soul.
Notes:
Merged: https://github.com/ruby/ruby/pull/3347
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Remove all usages of RCAST() so that the header file can be excluded
from ruby/ruby.h's dependency.
Notes:
Merged: https://github.com/ruby/ruby/pull/3346
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To fix build failures.
Notes:
Merged: https://github.com/ruby/ruby/pull/3079
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Devs do not love "3". The only exception is RUBY3_KEYWORDS in parse.y,
which seems unrelated to our interests.
Notes:
Merged: https://github.com/ruby/ruby/pull/3079
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This shall fix compile errors.
Notes:
Merged: https://github.com/ruby/ruby/pull/3079
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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
Notes:
Merged: https://github.com/ruby/ruby/pull/3023
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Split ruby.h
Notes:
Merged-By: shyouhei <[email protected]>
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Commit e91c39f1c0f7d5e670266d9593d533fd444957f6 deleted definition of it.
Though I'm not sure if we can delete public API like this, it no longer
works nontheless. Having declaration without definiton is worse than
having nothing at all. Just delete the declartion too.
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This compile-time option has been broken for years (at least since
commit 49369ef17316cd5d5819b038f286e1d951972b52, according to git
bisect). Let's delete codes that no longer works.
Notes:
Merged: https://github.com/ruby/ruby/pull/2925
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Comma at the end of enum is allowed in C since C99. We can use them
internally. However when it comes to extension libraries, they could be
written in different C++ versions. We cannot assume sometihng. Public
headers shall keep compatibilities.
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1. By substituting `n_var` with its initializer, `0 < n_var` is
equivalent to `argc > argi + n_trail`.
2. As `argi` is non-negative, so `argi + n_trail >= n_trail`, and
the above expression is equivalent to `argc > n_trail`.
3. Therefore, `f_last` is always false, and `last_hash` is no
longer used.
Notes:
Merged: https://github.com/ruby/ruby/pull/2873
Merged-By: nobu <[email protected]>
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This macro is no longer useful. Just expand it.
Notes:
Merged: https://github.com/ruby/ruby/pull/2864
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Case of __cplusplus is handled in cxxanyargs.hpp now. These deleted
codes no longer reachable.
Notes:
Merged: https://github.com/ruby/ruby/pull/2864
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C++ (and myself) hates macros. If we could do the same thing in both
preprocessor and template, we shall choose template. This particular
part of the ruby header is one of such situations.
Notes:
Merged: https://github.com/ruby/ruby/pull/2864
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Would like to edit them in forthcoming commit.
Notes:
Merged: https://github.com/ruby/ruby/pull/2864
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These were all deprecated in Ruby 2.7.
Notes:
Merged: https://github.com/ruby/ruby/pull/2845
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Inside the block where `RB_METHOD_DEFINITION_DECL` family are
defined.
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It is no longer used due to beae6cbf0fd8b6619e5212552de98022d4c4d4d4.
Coverity Scan found this.
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Due to beae6cbf0fd8b6619e5212552de98022d4c4d4d4, the variable last_idx
is no longer changed and always -1. This change simplifies the code by
removing the variable. Coverity Scan pointed out this.
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This removes the warnings added in 2.7, and changes the behavior
so that a final positional hash is not treated as keywords or
vice-versa.
To handle the arg_setup_block splat case correctly with keyword
arguments, we need to check if we are taking a keyword hash.
That case didn't have a test, but it affects real-world code,
so add a test for it.
This removes rb_empty_keyword_given_p() and related code, as
that is not needed in Ruby 3. The empty keyword case is the
same as the no keyword case in Ruby 3.
This changes rb_scan_args to implement keyword argument
separation for C functions when the : character is used.
For backwards compatibility, it returns a duped hash.
This is a bad idea for performance, but not duping the hash
breaks at least Enumerator::ArithmeticSequence#inspect.
Instead of having RB_PASS_CALLED_KEYWORDS be a number,
simplify the code by just making it be rb_keyword_given_p().
Notes:
Merged: https://github.com/ruby/ruby/pull/2794
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warnings
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(old)
test.rb:4: warning: The last argument is used as the keyword parameter
test.rb:1: warning: for `foo' defined here; maybe ** should be added to the call?
(new)
test.rb:4: warning: The last argument is used as keyword parameters; maybe ** should be added to the call
test.rb:1: warning: The called method `foo' is defined here
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This removes the security features added by $SAFE = 1, and warns for access
or modification of $SAFE from Ruby-level, as well as warning when calling
all public C functions related to $SAFE.
This modifies some internal functions that took a safe level argument
to no longer take the argument.
rb_require_safe now warns, rb_require_string has been added as a
version that takes a VALUE and does not warn.
One public C function that still takes a safe level argument and that
this doesn't warn for is rb_eval_cmd. We may want to consider
adding an alternative method that does not take a safe level argument,
and warn for rb_eval_cmd.
Notes:
Merged: https://github.com/ruby/ruby/pull/2476
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Limit strict function signature check with RUBY_METHOD_FUNC in C++
to bundled libraries only. [Bug #16271]
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This macro is used here before defined in ruby.h.
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There is no need for these in Ruby 3.0, and the plan is to
remove them.
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This adds rb_funcall_passing_block_kw, rb_funcallv_public_kw,
and rb_yield_splat_kw. This functions are necessary to easily
handle cases where rb_funcall_passing_block, rb_funcallv_public,
and rb_yield_splat are currently used and a keyword argument
separation warning is raised.
Notes:
Merged: https://github.com/ruby/ruby/pull/2507
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This fixes instance_exec and similar methods. It also fixes
Enumerator::Yielder#yield, rb_yield_block, and a couple of cases
with Proc#{<<,>>}.
This support requires the addition of rb_yield_values_kw, similar to
rb_yield_values2, for passing the keyword flag.
Unlike earlier attempts at this, this does not modify the rb_block_call_func
type or add a separate function type. The functions of type
rb_block_call_func are called by Ruby with a separate VM frame, and we can
get the keyword flag information from the VM frame flags, so it doesn't need
to be passed as a function argument.
These changes require the following VM functions accept a keyword flag:
* vm_yield_with_cref
* vm_yield
* vm_yield_with_block
Notes:
Merged: https://github.com/ruby/ruby/pull/2493
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GCC emits a lot of false positives for rb_scan_args because:
* `rb_scan_args(argc, argv, "*:", NULL, &opts);` makes `n_mand == 0`,
* `n_mand == argc + 1` implies `argc == -1`, and
* `memcpy(ptr, argv, sizeof(VALUE)*argc);` explodes
However, we know that argc is never so big, thus this is a false
positive. This change suppresses it by adding a condition `n_mand > 0`.
```
In file included from /usr/include/string.h:494,
from ./include/ruby/defines.h:145,
from ./include/ruby/ruby.h:29,
from ./include/ruby/encoding.h:27,
from dir.c:14:
In function 'memcpy',
inlined from 'ruby_nonempty_memcpy.part.0' at ./include/ruby/ruby.h:1763:17,
inlined from 'ruby_nonempty_memcpy' at ./include/ruby/ruby.h:1760:1,
inlined from 'rb_scan_args_set' at ./include/ruby/ruby.h:2594:9,
inlined from 'dir_s_aref' at dir.c:2774:12:
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:34:10: warning: '__builtin___memcpy_chk' pointer overflow between offset 0 and size [-8, 9223372036854775807] [-Warray-bounds]
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/x86_64-linux-gnu/bits/string_fortified.h:34:10: warning:
'__builtin___memcpy_chk' specified size 18446744073709551608 exceeds maximum object size 9223372036854775807 [-Wstringop-overflow=]
```
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Cfuncs that use rb_scan_args with the : entry suffer similar keyword
argument separation issues that Ruby methods suffer if the cfuncs
accept optional or variable arguments.
This makes the following changes to : handling.
* Treats as **kw, prompting keyword argument separation warnings
if called with a positional hash.
* Do not look for an option hash if empty keywords are provided.
For backwards compatibility, treat an empty keyword splat as a empty
mandatory positional hash argument, but emit a a warning, as this
behavior will be removed in Ruby 3. The argument number check
needs to be moved lower so it can correctly handle an empty
positional argument being added.
* If the last argument is nil and it is necessary to treat it as an option
hash in order to make sure all arguments are processed, continue to
treat the last argument as the option hash. Emit a warning in this case,
as this behavior will be removed in Ruby 3.
* If splitting the keyword hash into two hashes, issue a warning, as we
will not be splitting hashes in Ruby 3.
* If the keyword argument is required to fill a mandatory positional
argument, continue to do so, but emit a warning as this behavior will
be going away in Ruby 3.
* If keyword arguments are provided and the last argument is not a hash,
that indicates something wrong. This can happen if a cfunc is calling
rb_scan_args multiple times, and providing arguments that were not
passed to it from Ruby. Callers need to switch to the new
rb_scan_args_kw function, which allows passing of whether keywords
were provided.
This commit fixes all warnings caused by the changes above.
It switches some function calls to *_kw versions with appropriate
kw_splat flags. If delegating arguments, RB_PASS_CALLED_KEYWORDS
is used. If creating new arguments, RB_PASS_KEYWORDS is used if
the last argument is a hash to be treated as keywords.
In open_key_args in io.c, use rb_scan_args_kw.
In this case, the arguments provided come from another C
function, not Ruby. The last argument may or may not be a hash,
so we can't set keyword argument mode. However, if it is a
hash, we don't want to warn when treating it as keywords.
In Ruby files, make sure to appropriately use keyword splats
or literal keywords when calling Cfuncs that now issue keyword
argument separation warnings through rb_scan_args. Also, make
sure not to pass nil in place of an option hash.
Work around Kernel#warn warnings due to problems in the Rubygems
override of the method. There is an open pull request to fix
these issues in Rubygems, but part of the Rubygems tests for
their override fail on ruby-head due to rb_scan_args not
recognizing empty keyword splats, which this commit fixes.
Implementation wise, adding rb_scan_args_kw is kind of a pain,
because rb_scan_args takes a variable number of arguments.
In order to not duplicate all the code, the function internals need
to be split into two functions taking a va_list, and to avoid passing
in a ton of arguments, a single struct argument is used to handle
the variables previously local to the function.
Notes:
Merged-By: jeremyevans <[email protected]>
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By using template and overloading, instead of transparent union.
Notes:
Merged: https://github.com/ruby/ruby/pull/2461
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