`Object#extend(mod)` bump the global constant cache if the module
has constants of its own.
So by moving these constants outside of `Meta` we avoid bumping
the cache.
363c399bac
This library originally used `abbrev` to expand abbreviations into
fully-qualified classes, but that was replaced in
f9ffe6684e
`abbrev` is no longer used anywhere, so this commit removes the require.
b76775f27d
Deprecates IDB::ReidlineInputMethod and USE_REIDLINE in favor of
IRB::RelineInputMethod and USE_RELINE. The Input method uses Reline to
read input from the console, so it can be named directly after the
Reline library like other inputs methods are (Readline, Stdio, etc.).
5bcade7130
This allows the file to be created without copying permissions
from Bundler's installation source. The previous behaviour was
noticed after installing Ruby through brew, and using bundle
init, which yielded a read-only Gemfile.
839a06851d
Object Shapes is used for accessing instance variables and representing the
"frozenness" of objects. Object instances have a "shape" and the shape
represents some attributes of the object (currently which instance variables are
set and the "frozenness"). Shapes form a tree data structure, and when a new
instance variable is set on an object, that object "transitions" to a new shape
in the shape tree. Each shape has an ID that is used for caching. The shape
structure is independent of class, so objects of different types can have the
same shape.
For example:
```ruby
class Foo
def initialize
# Starts with shape id 0
@a = 1 # transitions to shape id 1
@b = 1 # transitions to shape id 2
end
end
class Bar
def initialize
# Starts with shape id 0
@a = 1 # transitions to shape id 1
@b = 1 # transitions to shape id 2
end
end
foo = Foo.new # `foo` has shape id 2
bar = Bar.new # `bar` has shape id 2
```
Both `foo` and `bar` instances have the same shape because they both set
instance variables of the same name in the same order.
This technique can help to improve inline cache hits as well as generate more
efficient machine code in JIT compilers.
This commit also adds some methods for debugging shapes on objects. See
`RubyVM::Shape` for more details.
For more context on Object Shapes, see [Feature: #18776]
Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org>
Co-Authored-By: Eileen M. Uchitelle <eileencodes@gmail.com>
Co-Authored-By: John Hawthorn <john@hawthorn.email>
This list is out of date. At least OpenBSD since 2013 does not
allow one user to read the environment variables of a process
run by another user.
While we could try to keep the list updated, I think it's a bad
idea to not use the user/password from the environment, even if
another user on the system could read it. If http_proxy exists
in the environment, and other users can read it, it doesn't
make it more secure for Ruby to ignore it. You could argue that
it encourages poor security practices, but net/http should provide
mechanism, not policy.
Fixes [Bug #18908]
1e4585153d
Previously 9eead86 introduced non-commutativity of platforms, and
later commit 1b9f7f50 changed the behavior of `Gem::Platform.match` to
ensure the callee of `#=~` was the gem platform.
However, when the platform argument is a String, then the callee and
argument of `#=~` are flipped (see docs for `String#=~`), which works
against the fix from 1b9f7f50.
Closes#59383b1fb562e8
Otherwise the timeout thread would be added to the ThreadGroup of the thread that makes the first call to Timeout.timeout .
Fixes bug 19020: https://bugs.ruby-lang.org/issues/19020
Add a test case to make sure the common thread doesn't leak to another ThreadGroup
c4f1385c9a
Object Shapes is used for accessing instance variables and representing the
"frozenness" of objects. Object instances have a "shape" and the shape
represents some attributes of the object (currently which instance variables are
set and the "frozenness"). Shapes form a tree data structure, and when a new
instance variable is set on an object, that object "transitions" to a new shape
in the shape tree. Each shape has an ID that is used for caching. The shape
structure is independent of class, so objects of different types can have the
same shape.
For example:
```ruby
class Foo
def initialize
# Starts with shape id 0
@a = 1 # transitions to shape id 1
@b = 1 # transitions to shape id 2
end
end
class Bar
def initialize
# Starts with shape id 0
@a = 1 # transitions to shape id 1
@b = 1 # transitions to shape id 2
end
end
foo = Foo.new # `foo` has shape id 2
bar = Bar.new # `bar` has shape id 2
```
Both `foo` and `bar` instances have the same shape because they both set
instance variables of the same name in the same order.
This technique can help to improve inline cache hits as well as generate more
efficient machine code in JIT compilers.
This commit also adds some methods for debugging shapes on objects. See
`RubyVM::Shape` for more details.
For more context on Object Shapes, see [Feature: #18776]
Co-Authored-By: Aaron Patterson <tenderlove@ruby-lang.org>
Co-Authored-By: Eileen M. Uchitelle <eileencodes@gmail.com>
Co-Authored-By: John Hawthorn <john@hawthorn.email>
