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Message-Id: <4.3.1.2.20021026125125.038e4798@pop.rcn.com>
Date: Sat, 26 Oct 2002 12:56:14 -0400
To: Rommel Garcia Custodio <rommel AT citech DOT com DOT ph>, cygwin <cygwin AT cygwin DOT com>
From: "Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>
Subject: Re: [CYGWIN] SIGSEGV while debugging app when compiled by
  latest gcc
In-Reply-To: <3DBA4AC2.94D2831F@citech.com.ph>
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At 03:56 AM 10/26/2002, Rommel Garcia Custodio wrote:
>good morning,
>
>    short intro, ive been using cygwin for approx 3 years now.
>   and this is the first time this happened to me.
>
>    im building an application under cygwin. needless to say
>   my application ran properly when compiled by older versions
>   of the gcc compiler.
>
>    whenever i run my application under gdb i get a segmentation
>   violation when i run my application.
>
>    heres a backtrace:
>
>$ gdb -nw tst.exe
>GNU gdb 5.0 (20010428-3)
>Copyright 2001 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 "i686-pc-cygwin"...
>(gdb) r
>Starting program:
>/home/rommel/devel_v3/CLEANROOM/v3.02/v3.02.01.01/red/cbtps3_b
>qb/testsuite/tester/tst.exe
>
>Program received signal SIGSEGV, Segmentation fault.
>0x77e88207 in _libwinmm_a_iname ()
>(gdb) bt
>#0  0x77e88207 in _libwinmm_a_iname ()
>#1  0x0044b5c0 in cygwin_premain2 ()
>#2  0x61083a7d in _libwinmm_a_iname ()
>#3  0x61083ae6 in _libwinmm_a_iname ()
>#4  0x61083b30 in _libwinmm_a_iname ()
>#5  0x61082989 in _libwinmm_a_iname ()
>#6  0x610852c5 in _libwinmm_a_iname ()
>#7  0x61085409 in _libwinmm_a_iname ()
>#8  0x00449e20 in __register_frame_info_bases ()
>#9  0x00449e68 in __register_frame_info ()
>#10 0x0040105f in __do_frame_init ()
>#11 0x61005ed5 in _libwinmm_a_iname ()
>#12 0x61007a1b in _libwinmm_a_iname ()
>#13 0x004040fa in main (argc=1, argv=0x10042d38) at tst_main.c:480
>#14 0x61007549 in _libwinmm_a_iname ()
>#15 0x6100780d in _libwinmm_a_iname ()
>#16 0x0044b1b2 in cygwin_crt0 ()
>#17 0x0040103c in mainCRTStartup ()
>#18 0x77e9ca90 in _libwinmm_a_iname ()
>(gdb)
>
>    im compiling my application using:
>
>$ gcc -v
>Reading specs from /usr/lib/gcc-lib/i686-pc-cygwin/3.2/specs
>Configured with: /netrel/src/gcc-3.2-1/configure
>--enable-languages=c,c++,f77,ja
>va --enable-libgcj --enable-threads=posix --with-system-zlib
>--enable-nls --with
>out-included-gettext --enable-interpreter --disable-sjlj-exceptions
>--disable-ve
>rsion-specific-runtime-libs --enable-shared --build=i686-pc-linux
>--host=i686-pc
>-cygwin --target=i686-pc-cygwin --enable-haifa --prefix=/usr
>--exec-prefix=/usr
>--sysconfdir=/etc --libdir=/usr/lib --includedir=/nonexistent/include
>--libexecd
>ir=/usr/sbin
>Thread model: posix
>gcc version 3.2 20020818 (prerelease)
>
>    i suspected that there could be incompatibilities b/n gcc and gdb.
>   when i debug my app with gdb this problem occurs though it doesnt
>   occur when i run my app on top of Win2k.
>
>    im currently stumped!


Hm, I'm surprised you didn't note that you recently upgraded your Cygwin
environment.  When you do so and experience problems, the best place to 
look for information on it is the email archives.  Generally, if the problem
is a common one as a result of some change in Cygwin, you'll see other 
reports from the list and, many times, possible solutions.  In this case, 
you'd find your problem would fit right into the path just described.  The
short answer to the problem is, just continue and things will work fine.
Look at the email archives for more details if you're interested.  It's a 
great place to find answers!


Larry Hall                              lhall AT rfk DOT com
RFK Partners, Inc.                      http://www.rfk.com
838 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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