# Rubinius : Use Ruby™
Rubinius is an implementation of the Ruby programming language. The Rubinius bytecode virtual machine is written in C++. The bytecode compiler is written in pure Ruby. The vast majority of the core library is also written in Ruby, with some supporting primitives that interact with the VM directly.
Author: Less Than Three. <3. http://less.thanthree.com

1.2.3

## Overview

The Rubinius team is proud to announce the availability of 1.1.

1.1 is the first feature release since 1.0, and contains a number of new features, performance improvements, compatibility adjustements, and bugfixes.

#### Stats

- Commits: 546
- Days since last release: 112

#### Authors

- Evan Phoenix
- Brian Ford
- Dirkjan Bussink
- Jake Douglas
- Jose Narvaez
- Jeremy Evans
- Ian Leitch
- Paolo Capriotti
- Gavin Stark
- Duncan Mac-Vicar P
- Richard Musiol
- Tim Carey-Smith
- Ivan Evtukhovich
- Chuck Remes
- Konstantin Haase
- Alex Khamutov

## Summary

#### Additions

- Enable block inlining within the JIT
- Implement a new GIL algorithm to prevent starvation
- Add Debugger APIs and reference CLI debugger
- Overhaul finalizers, support for resurecting finalizers
- Basic ‘rbx docs’ command support.
- Add ‘rbx report’ and support for VM and ruby crashes
- Add CM::Script#eval_source
- Rewrote Array#pack and String#unpack
- Add code to detect bad extensions. Recompile your extensions.
- Add dbm, sdbm, and gdbm extensions
- Implement support for -n, -p, and -a. Fixes #353.
- Add and use –agent when running the specs
- Add String#secure_compare @x-api
- Add heapdump capability for memory debugging
- Add automatic object ivar packing (improves memory usage)

#### Fixes

- Improve FFI compatibility
- Support reading and writing callback type fields
- Fix a few more FFI incompat issues
- Improve rails 3.[01] compatibility
- Upgrade to RubyGems 1.3.7
- Handle control flow edge case in JIT. Fixes #478.
- A few simple fixups for stringscanner. Fixes #481.
- Fix parser edge case
- Support rb_sys_fail being passed NULL
- Verify that the ruby to build with is the one it was configured with
- Fixed Module#define_method to return a lambda Proc
- Add Kernel#type even though it’s deprecated. Fixes #469.
- Move Etc::Passwd and Etc::Group to Struct
- Add no-op rubysig.h to make extensions happy
- Add unblock support to rb_thread_blocking_region. Credit: kudo. Fixes #461.
- Add missing capi functions needed for hpricot
- Implemented rb_struct_aset, _aref.
- Add a rb_thread_critical and a null SIGALRM handler.
- Flush/update CAPI handles better. Fixes #455.
- Track the location of globals for rb_global_variable. Fixes #462.
- Handle check EINTR in rb_thread_select properly. Fixes #462.
- Ignore inlined methods when considering what to JIT
- Ignore an error when all input was read. Fixes #454.
- Temporary fix for perf regression in Array#include?.
- Rubinius eagerly raises on frozen objects.
- Normalizing all access of Tuple and ByteArray.
- Update array handles the first time you see one. Fixes #455.
- Fix docs and const-ness in capi. Fixes #457.
- Dir.glob also takes an array or a null delim string. Fixes #458.
- Fixed #require edge case. Closes #365.
- Performance fix. The JIT was accidently always using the reset pointer.
- Raise a TypeError if attempting to inherit from a metaclass.
- Fixed class variable with metaclass. Closes #411.
- Ensure String.pattern receives a positive size.
- Fully implement rb_iterate
- Added rb_hash_delete_if.
- Deal with being interrupted while writing better. Fixes #373.
- Fixes Float#divmod bug. Closes #451.
- Added RBIGNUM_SIGN.
- Added define for RB_NUM_COERCE_FUNCS_NEED_OPID. Closes #447.
- Fixed rb_hash implementation. Closes #446.
- Use the specified socket type instead of Socket::AF_UNSPEC, fixes #442
- Fix fallback to ObjectMemory allocation if no new slab can be allocated
- Use RbConfig instead of Config
- Rework Process::Status specs to be simplified and run them on Windows
- Keep reading if read(2) gets EINTR
- Speed up Kernel#` by using a specialized primitive
- Use same function signature as MRI for rb_reg_new
- Check for and run #to_ary when passed to yield with 2+ args. Fixes #374.
- Don’t expand -I paths. Fixes #434.
- Remove old, stale minitest
- Slight cleanup of Socket and adding Socket.getnameinfo
- Add support for rb_gv_get(“$~”)
- Initial version.h for C-API.
- Add the C API rb_reg_nth_match method
- Add C API function rb_reg_new
- Fixed compiling empty script with __END__ data. Closes #433.
- Remove unused libltdl.
- Fixes for Process::Status
- Fix Thread.critical= allows all non-bool arguments
- Use getrusage for Process.times
- Disable the agent in forks and cleanup before exec
- Check the handle against our known set of handles before marking in rb_gc_mark_maybe()
- Validate StatiScopes in constant caches. Fixes #426.
- Pass the current block into an sclass. Fixes #425.
- Handle frozen strings used for a StringIO
- Fix MatchData#string returns a frozen copy of the match string
- Allow IO.setup to be passed a numeric mode
- Fix IO#write_nonblock to raise on an unwritable IO even if data to write is 0 bytes
- Enhance Rubinius::Fiber
- Module#class_variable_set now raises a TypeError when self is frozen
- Fix IO.foreach with a nil separator, it should yield the entire contents at once
- Remove Ar since it’s not used anymore
- Allow splat arguments in define_method. Fixes #419.
- Preserve path seperators in Dir.glob. Fixes #420.
- add rb_need_block() to rbx capi
- Kernel.extend now raises a TypeError, when called on a frozen object
- Fix profiler graph output and handling of blocks
- Cleanup of Bignum#%, significant performance improvement
- Don’t allow initializing a class twice
- Move Hash#setup to Hash#__setup__ to allow overriding
- Cleanup IO.popen and IO::BidirectionalPipe
- Only run ->dfree if ->data isn’t NULL
- Fix Module#remove_const to not call Module#const_missing
- Temporarily disable running finalizers at exit.
- Test the proper scope when determining if long return is possible
- Deal with Fixnum and Symbol speciallize in #methods. Fixes #403
- Handle #inspect calling #to_s in the right cases. Fixes #405
- Handle block arguments to a lambda specially. Fixes #398.
- File#truncate now raises an IOError if file is not opened for writing
- Fix R::CompiledMethod#add_metadata to allow multiple keys
- Don’t use self in a block that might be instance_evald. Fixes #399.
- Expose the SystemExit to at_exit handlers. Fixes #395.
- Minor performanece fix, don’t initialize an object body twice
- Have Proc#inspect use the exact same format as MRI
- Support -1 as the free function
- Add Rubinius specific #__finalize__ API for resurrectable finalizers
- Fix Struct.specialize_initialize for subclasses of Struct
- Add rb_throw to the C API.
- Fix classic strncmp bug in libffi
- Fixed be_computed_by matcher to display inspected value.
- Add implementation for rb_yield_values
- Include errno.h to ruby.h (MRI includes it in rubyio.h).
- Speed/foolproof Kernel#dup. Add custom object_class inline logic.
- Fixed File.size and .size?.
- Fix File#size to conform to specs. Closes #392.
- Add a primitive to calculate the MRI format backtrace. @perf @rspec
- Check frozen on Hash#initialize.
- Fix for next with ensure (pair Evan).
- Fixed compiler specs for next running ensure.
- Fixed next running ensures.
- Specs for next running ensure blocks.
- Fix -Xjit.profile to provide JIT specific output
- Remove extranious cast_array from bytecode
- Convert Hash to use #each_entry instead of #to_iter. @perf
- Add missing OFFT2NUM. Fixes #390.
- Time objects return T_DATA to match MRI C API
- Remove custom sorting logic in Enumerable, use Array.
- Added rb_set_kcode.
- Fix warnings compiling Melbourne ext in 1.9.
- Generalize building with MRI 1.8/1.9 or rbx.
- Add –cc to configure Script, so you can do ‘rvm install rbx -C –cc=clang’, as with MRI and REE.
- Fix building with gcc 4.4.1.
- Run at_exit blocks and finalizers before exiting a fork. Fixes #372.
- Add -Xgc.honor_start to control if GC.start is honored
- Use thread-safe Array#delete_if. Fixes #361.
- Fixed path in IO.reopen. Closes #360.
- Minimize array contents for IO.select. Fixes #359
- Fix TCPServer.for_fd and UNIXSocket.for_fd. Fixes #354. Fixes #355.
- Fix ugly signal bug related to pipe fds.
- Fix IO#write_nonblock to conform to specs
- Allow CallFrame::print_backtrace to see included modules
- Fix IO#write_nonblock to actually not block
- Rework how signals are delivered. Fixes #356
- Conform WeakRef API to MRI. Closes #370.
- Added io/nonblock.rb from MRI 1.8.7. Test passes. Closes #346.
- Added rb_to_int. Closes #367.
- Added stub weakref.rb. Closes #368.
- Adjust checking for GCC version to build on Fedora 8.
- Dir.new needs to convert path to a String also.
- Dir#new should call #to_str under 1.8 and #to_path under 1.9
- Fixed Dir.open to call StringValue. Closes #362.
- Dir should be calling to_str on non-String arguments in Ruby 1.8
- kronos’ fix for Bignum#<<. Closes #350.
- Use correct module namespacing in Numeric specs.
- Further conform Numeric to MRI. Closes #349.
- More specs for Numeric#<=>.
- Reworked profiler graph output change.
- Add NUM2OFFT, fixes #348
- Ensure argument is not modified by File.expand_path. Closes #351.
- Spec for alias+super interaction with included modules
- Validate the starting Module of a super call. @crash