Re: [Chicken-users] Strange segfaults when linking with pthreads

[Mario Domenech Goulart]

Hi Peter,

On Thu, 3 Mar 2011 21:01:04 +0100 Peter Bex <address@hidden> wrote:

> 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 :)

I cannot reproduce the problem on Linux:

$ csc -s -lpthread foo.scm

$ csi -n

CHICKEN
(c)2008-2010 The Chicken Team
(c)2000-2007 Felix L. Winkelmann
Version 4.6.2 
linux-unix-gnu-x86-64 [ 64bit manyargs dload ptables ]
compiled 2010-10-11 on monster (Linux)

#;1> (load "foo")
; loading foo.so ...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/chicken.import.so ...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/scheme.import.so
...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/sendfile.so ...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/intarweb.so ...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/base64.so ...
; loading /home/mario/local/chicken-4.6.2/lib/chicken/5/test.so ...
yo


Best wishes.
Mario
-- 
http://parenteses.org/mario