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libg++ 2.8.1.1 - sigsegv in re_compile_fastmap(..)
- To: libc-alpha@cygnus.com
- Subject: libg++ 2.8.1.1 - sigsegv in re_compile_fastmap(..)
- From: therapy@guardian.htu.tuwien.ac.at
- Date: 16 Sep 1998 18:26:16 -0000
>Submitter-Id: net
>Originator: Therapy?
>Organization:
bye,
therapy
>
>Confidential: no
>Synopsis: libg++ 2.8.1.1 - sigsegv in re_compile_fastmap of Regex:Regex(..)
>Severity: serious
>Priority: medium
>Category: libc
>Class: sw-bug
>Release: libc-2.0.95
>Environment:
libg++ 2.8.1.1
Host type: i586-pc-linux-gnu
System: Linux guardian 2.1.120 #4 Wed Sep 9 15:23:21 MET DST 1998 i586
Architecture: i586
Addons: crypt linuxthreads
Build CC: gcc
Compiler version: egcs-2.91.57 19980901 (egcs-1.1 release)
Kernel headers: 2.1.120
Symbol versioning: yes
Build static: yes
Build shared: yes
Build pic-default: no
Build profile: yes
Build omitfp: no
Build bounded: no
Build static-nss: no
Stdio: libio
>Description:
netscape 4.5glibc2 needs libg++.so.2.7.2..
so i compiled libg++-2.8.1.1 in combination with libstdc++ (which says to be
2.9.0) of egcs. - as far as i can find out Regex::Regex (of libg++/src/Regex.cc)
calls re_compile_fastmap of glibc/posix/regex.c which sigsegv's before
INIT_FAIL_STACK.. haven't done any further bugtracking..
probably because netscape needs 2.7.2 and not 2.8.1.1 but i guess this does not matter..
---
(gdb) run
Starting program: /usr/local/netscape/netscape
(no debugging symbols found)...(no debugging symbols found)...
Program received signal SIGSEGV, Segmentation fault.
0x401af2c1 in __bzero ()
(gdb) bt
#0 0x401af2c1 in __bzero ()
#1 0x8bfc040 in ?? ()
---comment
^^ i'm not so familiar with debugging - can anyone tell me whats at this adress? looks like a stack address to me..
---/comment
#2 0x4024c1da in Regex::Regex (this=0x40281100,
t=0x4026daef "[ \n\t\r\013\f]+", fast=1, bufsize=40, transtable=0x0)
at ../../../../libg++/src/Regex.cc:77
#3 0x4024c429 in global constructors keyed to Regex::~Regex ()
at ../../../../libg++/src/Regex.cc:141
#4 0x4026da04 in __do_global_ctors_aux ()
#5 0x4024a312 in _init ()
#6 0x400024d2 in _dl_start_user () at rtld.c:113
#7 0x8bfd000 in ?? ()
Cannot access memory at address 0x8bfe000.
>How-To-Repeat:
communicator-v45b1.x86-unknown-linux2.0 + libg++ 2.8.1.1 forced libg++ 2.7.2
>Fix:
unknown.