Re: c/8350: segmentation fault when using -shared-libgcc on Solaris2.9

Re: c/8350: segmentation fault when using -shared-libgcc on Solaris2.9

[Bob Harris]

The following reply was made to PR c/8350; it has been noted by GNATS.

From: Bob Harris <rmharrisva@netscape.net>
To: gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org, nobody@gcc.gnu.org,
        gcc-prs@gcc.gnu.org, boulier@lifl.fr
Cc:  
Subject: Re: c/8350: segmentation fault when using -shared-libgcc on Solaris2.9
Date: Tue, 29 Apr 2003 13:28:38 -0400

 I would like to add that I am seeing this exact same problem with GCC 
 3.1 on
 Solaris 8 (64bit mode) on a Sun Blade 100.
 
 ksh [gadalka] - / -> uname -a && gcc -v
 SunOS gadalka 5.8 Generic_108528-20 sun4u sparc SUNW,Sun-Blade-100
 Reading specs from /opt/gcc/lib/gcc-lib/sparcv9-sun-solaris2.8/3.1/specs
 Configured with: ./configure --prefix=/opt/gcc 
 -host=sparcv9-sun-solaris2.8 --enable-threads=solaris --disable-nls
 Thread model: solaris
 gcc version 3.1
 ksh [gadalka] - / ->
 
 
 Static libs are okay.  But every shared lib I have tried to build always 
 seg faults.
 This includes shared libs (.so) that GCC 3.1 builds as part of an 
 appplication.
 
 Is there going to be a fix any time soon?   This is a most annoying problem.
 
 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8350
 
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 Bob Harris                        Email: rharris@sprint.net
 Systems Programmer III              Fax: (703) 478-5471
 Sprint / IP Services
 DNS and News (USENET) Team
 
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Re: c/8350: segmentation fault when using -shared-libgcc on Solaris2.9

[davem]

Synopsis: segmentation fault when using -shared-libgcc on Solaris2.9

State-Changed-From-To: open->closed
State-Changed-By: davem
State-Changed-When: Fri Oct 25 07:07:43 2002
State-Changed-Why:
    Binutils bug, back down to version 2.12 or use the current developer snapshot of binutils.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8350

c/8350: segmentation fault when using -shared-libgcc on Solaris2.9

[boulier]

>Number:         8350
>Category:       c
>Synopsis:       segmentation fault when using -shared-libgcc on Solaris2.9
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 25 06:46:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     boulier@lifl.fr
>Release:        gcc 3.2
>Organization:
>Environment:
SunOS troismonts 5.9 Generic sun4u sparc SUNW,Sun-Blade-100
>Description:
A program linked with the shared version of libgcc on a 
Sun Blade 100 under Solaris 2.9, gives a segmentation 
fault. The compiler is gcc 3.2.

Version of gcc
--------------
{troismonts-boulier-~/TOTO } gcc --version
gcc (GCC) 3.2
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

{troismonts-boulier-~/TOTO } cat /export/GCC/gcc-3.2-install-2/config.status
#!/bin/sh
# This file was generated automatically by configure.  Do not edit.
# This directory was configured as follows:
/export/GCC/gcc-3.2/configure --with-gcc-version-trigger=/export/GCC/gcc-3.2/gcc
/version.c --host=sparc-sun-solaris2.9 --with-gnu-ld --with-gnu-as --enable-thre
ads --enable-shared --enable-languages=c,c++ --norecursion
# using "mh-frag" and "mt-frag"

Test file
---------
{troismonts-boulier-~/TOTO } cat a.c
main ()
{
}

The bug
-------
{troismonts-boulier-~/TOTO } gcc -g -shared-libgcc a.c
{troismonts-boulier-~/TOTO } a.out
Segmentation Fault (core dumped)
{troismonts-boulier-~/TOTO } ldd a.out
        libgcc_s.so.1 =>         /usr/local/lib/libgcc_s.so.1
        libc.so.1 =>     /usr/lib/libc.so.1
        libdl.so.1 =>    /usr/lib/libdl.so.1
        /usr/platform/SUNW,Sun-Blade-100/lib/libc_psr.so.1
With gdb
--------
{troismonts-boulier-~/TOTO } gdb a.out
GNU gdb 5.2.1
Copyright 2002 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.9"...
(gdb) run
Starting program: /home/calforme/boulier/TOTO/a.out

Program received signal SIGSEGV, Segmentation fault.
__register_frame_info_bases (begin=0xff380000, ob=0xff380000, tbase=0x0,
    dbase=0x0) at /export/GCC/gcc-3.2/gcc/unwind-dw2-fde.c:83
83        ob->tbase = tbase;

I have tried to rebuild gcc without any optimization.
The bug is still there. The bug location may be more
accurate but I do not understand why a SIGSEGV. With gdb :

(gdb) run
Starting program: /home/calforme/boulier/TOTO/a.out 

Program received signal SIGSEGV, Segmentation fault.
0xff37a2b4 in __register_frame_info_bases (begin=0xff370000, ob=0xff370000, 
    tbase=0x0, dbase=0x0) at /export/GCC/gcc-3.2/gcc/unwind-dw2-fde.c:82
82        ob->pc_begin = (void *)-1;
(gdb) print ob
$1 = (struct object *) 0xff370000
(gdb) print *ob
$2 = {pc_begin = 0x7f454c46, tbase = 0x1020100, dbase = 0x0, u = {
    single = 0x0, array = 0x0, sort = 0x0}, s = {b = {sorted = 0, 
      from_array = 0, mixed_encoding = 0, encoding = 0, count = 196610}, 
    i = 196610}, next = 0x1}





>How-To-Repeat:
See description
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: