akr	2008-06-28 21:25:45 +0900 (Sat, 28 Jun 2008)

  New Revision: 17635

  Modified files:
    trunk/ChangeLog
    trunk/gc.c
    trunk/include/ruby/ruby.h
    trunk/marshal.c
    trunk/re.c
    trunk/string.c

  Log:
    * include/ruby/ruby.h (struct RRegexp): new field usecnt.  replace
      str and len by src.
    
    * gc.c (gc_mark_children): mark src field of regexp.
      (obj_free): don't free str field.
    
    * re.c (REG_BUSY): removed.
      (rb_reg_initialize): prohibit re-initialize regexp.
      (rb_reg_search): use usecnt to prevent freeing regexp currently
      using.  this prevents SEGV by:
        r = /\A((a.)*(a.)*)*b/
        r =~ "ab" + "\xc2\xa1".force_encoding("euc-jp")
        t = Thread.new { r =~ "ab"*8 + "\xc2\xa1".force_encoding("utf-8")}
        sleep 0.2
        r =~ "ab"*8 + "\xc2\xa1".force_encoding("euc-jp")
    


  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/include/ruby/ruby.h?r1=17635&r2=17634&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/string.c?r1=17635&r2=17634&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/ChangeLog?r1=17635&r2=17634&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/gc.c?r1=17635&r2=17634&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/marshal.c?r1=17635&r2=17634&diff_format=u
  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi/trunk/re.c?r1=17635&r2=17634&diff_format=u