[#53072] [ruby-trunk - Feature #7994][Open] Make iterators pass an implicit named parameter `iteration` to the executed block — "alexeymuranov (Alexey Muranov)" <redmine@...>

10 messages 2013/03/01

[#53097] [ruby-trunk - Bug #8000][Open] "require 'tk'" segfaults on 64-bit linux with Tk 8.6 — "edmccard (Ed McCardell)" <edmccard@...>

25 messages 2013/03/02

[#53137] [ruby-trunk - Bug #8017][Open] Got segmentation fault on attempt to install ruby 2.0.0-p0 on Mac 10.6.8 via RVM — "adantel (Alex Filatau)" <filatau@...>

9 messages 2013/03/05

[#53168] [ruby-trunk - Bug #8034][Open] File.expand_path('something', '~') do not include home path — "rap-kasta (Pavel Manylov)" <rapkasta@...>

12 messages 2013/03/06

[#53199] [ruby-trunk - Bug #8040][Open] Unexpect behavior when using keyword arguments — "pabloh (Pablo Herrero)" <pablodherrero@...>

11 messages 2013/03/07

[#53203] [ruby-trunk - Feature #8042][Open] Add Addrinfo#socket to create a socket that is not connected or bound — "drbrain (Eric Hodel)" <[email protected]>

12 messages 2013/03/07

[#53248] Github commit log should not be used as references on redmine — Marc-Andre Lafortune <ruby-core-mailing-list@...>

Github commit log should not be used as references on redmine. E.g:

10 messages 2013/03/09

[#53386] [CommonRuby - Feature #8088][Open] Method#parameters (and friends) should provide useful information about core methods — "headius (Charles Nutter)" <headius@...>

14 messages 2013/03/13

[#53412] [CommonRuby - Feature #8096][Open] introduce Time.current_timestamp — "vipulnsward (Vipul Amler)" <vipulnsward@...>

34 messages 2013/03/14

[#53439] [ruby-trunk - Bug #8100][Open] Segfault in ruby-2.0.0p0 — "judofyr (Magnus Holm)" <judofyr@...>

22 messages 2013/03/15

[#53478] [ruby-trunk - Feature #8107][Open] [patch] runtime flag to track object allocation metadata — "tmm1 (Aman Gupta)" <[email protected]>

20 messages 2013/03/16

[#53498] [ruby-trunk - Feature #8110][Open] Regex methods not changing global variables — "prijutme4ty (Ilya Vorontsov)" <prijutme4ty@...>

21 messages 2013/03/18

[#53502] [ruby-trunk - Bug #8115][Open] make install DESTDIR=/my/install/path fails — "vo.x (Vit Ondruch)" <v.ondruch@...>

11 messages 2013/03/18

[#53688] [ruby-trunk - Feature #8158][Open] lightweight structure for loaded features index — "funny_falcon (Yura Sokolov)" <funny.falcon@...>

27 messages 2013/03/24

[#53692] [ruby-trunk - Bug #8159][Open] Build failure introduced by Rinda changes — "luislavena (Luis Lavena)" <luislavena@...>

22 messages 2013/03/24

[#53733] [ruby-trunk - Bug #8165][Open] Problems with require — "Krugloff (Alexandr Kruglov)" <mr.krugloff@...>

12 messages 2013/03/26

[#53742] [ruby-trunk - Bug #8168][Open] Feature request: support for (single) statement lambda syntax/definition — "garysweaver (Gary Weaver)" <garysweaver@...>

9 messages 2013/03/26

[#53765] [ruby-trunk - Bug #8174][Open] AIX header file conflict with rb_hook_list_struct — "edelsohn (David Edelsohn)" <dje.gcc@...>

11 messages 2013/03/27

[#53808] [ruby-trunk - Feature #8181][Open] New flag for strftime that supports adding ordinal suffixes to numbers — "tkellen (Tyler Kellen)" <tyler@...>

10 messages 2013/03/28

[#53811] [ruby-trunk - Bug #8182][Open] XMLRPC request fails with "Wrong size. Was 31564, should be 1501" — "tsagadar (Marcel Mueller)" <marcel.mueller@...>

28 messages 2013/03/28

[#53849] [ruby-trunk - Feature #8191][Open] Short-hand syntax for duck-typing — "wardrop (Tom Wardrop)" <tom@...>

48 messages 2013/03/31

[#53850] An evaluation of 2.0.0 release — Yusuke Endoh <mame@...>

Let's look back at 2.0.0 release so that we can do better next time.

12 messages 2013/03/31

[ruby-core:53195] [ruby-trunk - Feature #7791] Let symbols be garbage collected

From: "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>
Date: 2013-03-07 16:52:05 UTC
List: ruby-core #53195
Issue #7791 has been updated by rosenfeld (Rodrigo Rosenfeld Rosas).


Jeremy, I don't understand how #to_existing_sym could avoid the issue. Take your gem "sequel" for instance. In my application there is a class that will generate dynamic queries based on the user params. Sequel will always convert those dynamic column alias (like "v786") to symbols. Those symbols won't exist when the application boots. If Sequel used #to_existing_sym for creating the symbol it would raise since that symbol wouldn't exist.
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Feature #7791: Let symbols be garbage collected
https://bugs.ruby-lang.org/issues/7791#change-37363

Author: rosenfeld (Rodrigo Rosenfeld Rosas)
Status: Feedback
Priority: Normal
Assignee: matz (Yukihiro Matsumoto)
Category: core
Target version: next minor


Lots of Denial-of-Service security vulnerabilities exploited in Ruby programs rely on symbols not being collected by garbage collector.

Ideally I'd prefer symbols and strings to behave exactly the same being just alternate ways of writing strings but I'll let this to another ticket.

This one simply asks for symbols to be allowed to be garbage collected when low on memory. Maybe one could set up some up-limit memory constraints dedicated to storing symbols. That way, the most accessed symbols would remain in that memory region and the least used ones would be reclaimed when the memory for symbols is over and a new symbol is created.

Or you could just allow symbols to be garbage collected any time. Any reasons why this would be a bad idea? Any performance benchmark demonstrating how using symbols instead of strings would make a real-world software perform much better?

Currently I only see symbols slowing down processing because people don't want to worry about it and will often use something like ActiveSupport Hash#with_indifferent_access or some other method to convert a string to symbol or vice versa...


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