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[Chicken-users] Strange segfaults when linking with pthreads
From: |
Peter Bex |
Subject: |
[Chicken-users] Strange segfaults when linking with pthreads |
Date: |
Thu, 3 Mar 2011 21:01:04 +0100 |
User-agent: |
Mutt/1.4.2.3i |
Hello there,
I've been observing something really strange for a while and decided to
finally dig a little deeper. It appears that when I link to libpthread,
even if I don't use it, Chicken segfaults.
To reproduce this, put the following in a file called "foo.scm":
(module foo *
(import chicken scheme)
;; Just a lot of semi-random libraries here:
(use srfi-1 srfi-13 srfi-4 data-structures spiffy test)
(print "yo"))
Then when I run
$ csc -s -lpthread foo.scm
$ csi
CHICKEN
(c)2008-2010 The Chicken Team
(c)2000-2007 Felix L. Winkelmann
Version 4.6.0
netbsd-unix-gnu-x86-64 [ 64bit manyargs dload ptables ]
compiled 2011-01-21 on langly (NetBSD)
#;1> (load "foo")
; loading foo.so ...
; loading /usr/pkg/lib/chicken/5/chicken.import.so ...
; loading /usr/pkg/lib/chicken/5/scheme.import.so ...
; loading /usr/pkg/lib/chicken/5/srfi-1.import.so ...
; loading /usr/pkg/lib/chicken/5/srfi-13.import.so ...
; loading /usr/pkg/lib/chicken/5/srfi-4.import.so ...
[ETCETERA]
; loading /usr/pkg/lib/chicken/5/test.so ...
yo
#;2> zsh: segmentation fault csi
This appears to happen *only* on 64-bit platforms, I don't see it on
my 32-bit powerpc mac. The segfault is a bit elusive because it happens
only after I load lots of libraries. When csi is invoked with -e or
with -q, I generally don't get the segfault as easily, so it probably
has something to do with the garbage collector; when it generates many
strings it needs to clean up it fails. Or something :)
You might wonder why I'm trying to link against libpthread, but that's
not really what I'm trying to do. For example, svn-client links against
libsvn_client, which itself links to libpthread (through apr, I think).
If this segfault happens, I simply can't work on svn-client.
I am currently very uncertain whether this is a bug in Chicken,
libpthread on NetBSD, the combination of the two, or something else.
HELP! ;)
Cheers,
Peter
--
http://sjamaan.ath.cx
--
"The process of preparing programs for a digital computer
is especially attractive, not only because it can be economically
and scientifically rewarding, but also because it can be an aesthetic
experience much like composing poetry or music."
-- Donald Knuth
- [Chicken-users] Strange segfaults when linking with pthreads,
Peter Bex <=
- Re: [Chicken-users] Strange segfaults when linking with pthreads, Moritz Heidkamp, 2011/03/03
- Re: [Chicken-users] Strange segfaults when linking with pthreads, Mario Domenech Goulart, 2011/03/03
- Re: [Chicken-users] Strange segfaults when linking with pthreads, Felix, 2011/03/03
- [Chicken-users] Re: Strange segfaults when linking with pthreads, Aleksej Saushev, 2011/03/03
- Re: [Chicken-users] Strange segfaults when linking with pthreads, Felix, 2011/03/04