From: "Iñaki Baz Castillo" <redmine@...>
Date: 2011-01-12T11:04:21+09:00
Subject: [ruby-core:34399] [Ruby 1.9-Bug#4272][Open] rb_enc_str_new() causes segmentfault when using threads in parallel


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Bug #4272: rb_enc_str_new() causes segmentfault when using threads in par=
allel
http://redmine.ruby-lang.org/issues/show/4272

Author: I=C3=B1aki Baz Castillo
Status: Open, Priority: Normal
Category: core
ruby -v: 1.9.2-p136

Hi, I attach a custom C extension which shows how rb_enc_str_new() causes=
 segmentfault when running multiple threads. The bug is reproducible in 1=
.9.2-p0, 1.9.2-p136 and 1.9 today's snapshot (2011-01-12).

In order to test the bug compile the extension and use the included test_=
bug.rb script passing a long number (iterations) as argument (1000, 10000=
...).

  ~# ruby extconf.rb && make && ruby test_bug.rb 5000

The provided C extension is very simple and just contains two methods:

  TestEncoding::Tester#test_rb_str_new =3D> returns a string encoded in A=
SCII-8BIT (generated with "rb_str_new").
  TestEncoding::Tester#test_rb_enc_str_new =3D> returns a string encoded =
in UTF-8 (generated with "rb_enc_str_new").

When running threads in parallel with the second method, after some itera=
tions Ruby crashses (as the provided test_bug.rb shows).


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