From: Naohisa Goto <ngotogenome@...>
Date: 2011-10-20T11:35:59+09:00
Subject: [ruby-core:40241] [Ruby 1.9 - Bug #5244] Continuation causes Bus Error on Debian sparc


Issue #5244 has been updated by Naohisa Goto.


I think a possible workaroud to distinguish 32-bit on Debian Sparc (or on Sparc Linux) is to check SIZEOF_VOIDP (value of sizeof(void *) set by configure) in addition to sparc specific macros.

FYI, on Solars10, Sun compiler (Sun Studio, Oracle Solaris Studio) defines __sparcv9 only when generating 64-bit code for SPARC V9.
http://developers.sun.com/sunstudio/documentation/ss12u1/mr/READMEs/c++_faq.html#Vers6

GCC on Solaris 10 also does so.

$ gcc-4.4 -E -dM -xc /dev/null | grep -i -e sparc -e arch64
#define sparc 1
#define __sparc__ 1
#define __sparcv8 1
#define __sparc 1
$ gcc-4.4 -m64 -E -dM -xc /dev/null | grep -i -e sparc -e arch64 
#define sparc 1
#define __sparc__ 1
#define __sparcv9 1
#define __sparc 1
#define __arch64__ 1

----------------------------------------
Bug #5244: Continuation causes Bus Error on Debian sparc
http://redmine.ruby-lang.org/issues/5244

Author: Lucas Nussbaum
Status: Open
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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