[#57574] [ruby-trunk - Feature #8976][Open] file-scope freeze_string directive — "akr (Akira Tanaka)" <akr@...>

70 messages 2013/10/02

[#57579] [ruby-trunk - Feature #8977][Open] String#frozen that takes advantage of the deduping — "sam.saffron (Sam Saffron)" <sam.saffron@...>

25 messages 2013/10/02

[#57679] [ruby-trunk - Feature #8987][Open] map/collect extension which handles arguments — "sowieso (So Wieso)" <sowieso@...>

16 messages 2013/10/05

[#57705] [ruby-trunk - Feature #8992][Open] Use String#freeze and compiler tricks to replace "str"f suffix — "headius (Charles Nutter)" <headius@...>

43 messages 2013/10/07

[#57727] [ruby-trunk - Feature #8998][Open] string keys for hash literals should use fstrings — "normalperson (Eric Wong)" <normalperson@...>

17 messages 2013/10/08

[#57771] [ruby-trunk - Bug #9008][Open] TestProcess#test_clock_getres_constants and TestProcess#test_clock_gettime_constants fails on ARM — "vo.x (Vit Ondruch)" <v.ondruch@...>

15 messages 2013/10/09

[#57888] [ruby-trunk - Feature #9025][Open] Clarify the error message when calling a method with the wrong number of arguments — Nerian (Gonzalo Rodríguez) <siotopo@...>

11 messages 2013/10/15

[#57993] [ruby-trunk - Feature #9047][Open] Alternate hash key syntax for symbols — "jamonholmgren (Jamon Holmgren)" <jamon@...>

13 messages 2013/10/23

[#58007] [ruby-trunk - Feature #9049][Open] Shorthands (a:b, *) for inclusive indexing — "mohawkjohn (John Woods)" <john.o.woods@...>

25 messages 2013/10/24

[#58033] [ruby-trunk - Bug #9053][Open] SSL Issue with Ruby 2.0.0 — "tisba (Sebastian Cohnen)" <ruby-lang@...>

16 messages 2013/10/25

[#58080] [ruby-trunk - Feature #9064][Open] Add support for packages, like in Java — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

23 messages 2013/10/30

[ruby-core:57794] [ruby-trunk - Bug #9011][Open] rb_fstring unsafe to use in general case

From: "normalperson (Eric Wong)" <normalperson@...>
Date: 2013-10-10 00:26:01 UTC
List: ruby-core #57794
Issue #9011 has been reported by normalperson (Eric Wong).

----------------------------------------
Bug #9011: rb_fstring unsafe to use in general case
https://bugs.ruby-lang.org/issues/9011

Author: normalperson (Eric Wong)
Status: Open
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: trunk
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


I don't think the current "frozen"f in pure Ruby code is unsafe
(I haven't reproduced a crash)

But I do not think rb_fstring is generally safe for other C code, including extension authors

Consider the following case:

        fstr1 = rb_fstring(str)
        fstr1 goes out of scope
        GC mark runs ...
        fstr1 is eligible for lazy sweep
        fstr2 = rb_fstring(str)
        fstr2 is identical to fstr1
        fstr1 is swept (rb_str_free)
        fstr2 use attempted -> crash

I extracted this bug report from Feature #8998, where I showed a patch
which exposes this bug during "make check"



-- 
http://bugs.ruby-lang.org/

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