From: Naohisa Goto <ngotogenome@...>
Date: 2011-09-08T20:32:47+09:00
Subject: [ruby-core:39363] [Ruby 1.9 - Bug #5244] Continuation causes Bus Error on Debian sparc


Issue #5244 has been updated by Naohisa Goto.


The bug does not occur with older Debian sparc running on qemu.

1. download image http://people.debian.org/~aurel32/qemu/sparc/debian_etch_sparc_small.qcow2
2. qemu-system-sparc -hda debian_etch_sparc_small.qcow2 -M SS-10 -m 1G
3. change /etc/apt/sources.list
4. install subversion and many packages by using aptitude
5. manually install yaml-0.1.4.tar.gz and libffi-3.0.10.tar.gz
6. svn co http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_3
   (fetched revision r33190)
7. autoconf; ./configure --prefix=/home/user/ruby/193 optflags="-O2"
8. make
9. ./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -rcontinuation -e 'callcc { |c| c.call }' 
10. finished with exit code 0

$ uname -a
Linux debian-sparc 2.6.18-6-sparc32 #1 Fri Dec 12 16:29:52 UTC 2008 sparc GNU/Linux
$ dpkg -l gcc libc6
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-files/Unpacked/Failed-config/Half-installed
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name           Version            Description
+++-==============-==================-============================================
ii  gcc            4.1.1-15           The GNU C compiler
ii  libc6          2.3.6.ds1-13etch10 GNU C Library: Shared libraries


The bug might be specific to the svn revision 33077 and might have already been fixed in the latest svn revision.
----------------------------------------
Bug #5244: Continuation causes Bus Error on Debian sparc
http://redmine.ruby-lang.org/issues/5244

Author: Lucas Nussbaum
Status: Feedback
Priority: Normal
Assignee: Naohisa Goto
Category: 
Target version: 
ruby -v: -


Hi,

$ ./miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -rcontinuation -e 'callcc { |c| c.call }'
-e:1: [BUG] Bus Error
ruby 1.9.3dev (2011-08-26) [sparc-linux]

-- Control frame information -----------------------------------------------
c:0004 p:---- s:0009 b:0009 l:000008 d:000008 CFUNC  :callcc
c:0003 p:0009 s:0006 b:0006 l:000fcc d:001d74 EVAL   -e:1
c:0002 p:---- s:0004 b:0004 l:000003 d:000003 FINISH
c:0001 p:0000 s:0002 b:0002 l:000fcc d:000fcc TOP   

-- Ruby level backtrace information ----------------------------------------
-e:1:in `<main>'
-e:1:in `callcc'

-- C level backtrace information -------------------------------------------
Bus error


gdb says:
(gdb) run -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -rcontinuation -e 'callcc { |c| c.call }'
Starting program: /home/lucas/ruby1.9.1-1.9.3~preview1+svn33077/miniruby -I./lib -I. -I.ext/common ./tool/runruby.rb --extout=.ext -rcontinuation -e 'callcc { |c| c.call }'
[Thread debugging using libthread_db enabled]
[New Thread 0xf7fc7b70 (LWP 31418)]
[Thread 0xf7fc7b70 (LWP 31418) exited]
process 31417 is executing new program: /home/lucas/ruby1.9.1-1.9.3~preview1+svn33077/ruby1.9.1
[Thread debugging using libthread_db enabled]
[New Thread 0xf79e5b70 (LWP 31419)]

Program received signal SIGBUS, Bus error.
0xf7f4d304 in cont_capture (stat=Cannot access memory at address 0x49
) at cont.c:439
439	    if (ruby_setjmp(cont->jmpbuf)) {

(gdb) print cont
Cannot access memory at address 0xfffffff9


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