[Bug go/59866] New: gccgo gc work buffer is misaligned

[Bug go/59866] New: gccgo gc work buffer is misaligned

[dev.ma.dma at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59866

            Bug ID: 59866
           Summary: gccgo gc work buffer is misaligned
           Product: gcc
           Version: 4.8.2
            Status: UNCONFIRMED
          Severity: critical
          Priority: P3
         Component: go
          Assignee: ian at airs dot com
          Reporter: dev.ma.dma at gmail dot com

Created attachment 31879
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=31879&action=edit
go_test.log

fatal error: runtime: gc work buffer is misaligned
Simple test program for go does not run. While statically linked program works.
gcc-4.7.3 does not have this issue.
Please refer to the attached log file.

[Bug go/59866] gccgo gc work buffer is misaligned

[ian at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59866

--- Comment #1 from ian at gcc dot gnu.org <ian at gcc dot gnu.org> ---
Author: ian
Date: Fri Jan 17 22:42:38 2014
New Revision: 206737

URL: http://gcc.gnu.org/viewcvs?rev=206737&root=gcc&view=rev
Log:
    PR go/59866
runtime: Force work variable in mgc0 to be aligned on 8-byte boundary.

Modified:
    branches/gcc-4_8-branch/libgo/runtime/mgc0.c

[Bug go/59866] gccgo gc work buffer is misaligned

[ian at airs dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59866

Ian Lance Taylor <ian at airs dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #3 from Ian Lance Taylor <ian at airs dot com> ---
Thanks for the bug report.  I was not able to recreate the problem.  However,
based on the error report, I have committed a patch that may fix it.  Please
reopen this bug report if you continue to have this problem while using the
patch.

[Bug go/59866] gccgo gc work buffer is misaligned

[dev.ma.dma at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59866

--- Comment #4 from Dev <dev.ma.dma at gmail dot com> ---
Thank you for your quick patch. It works after apply together with another
patch "http://gcc.gnu.org/ml/gcc-patches/2013-10/msg01445.html", which seems to
be provided by you. Good work.
My target is 32bits i686. I use ct-ng to build gcc and set CT_ARCH_32=y,
CT_ARCH_BITNESS=32.