[fpc-pascal] How to analyze a core dump?

[ik]

Hi,

On 6/10/07, Luca Olivetti <luca at ventoso.org> wrote:
> Hello,
>
> I'm trying to debug a segment violation, I compiled the program with -g,
> but analyzing the core dump isn't really helpful, maybe the "warning
> can't read pathname for load map" is the cause? Or it's possible that
> it's caused by some of the c libraries used having no debug symbols? Any
> hint?
> Here's my gdb session:
>
>
> $ gdb ./botphone core.28682

Try the following:

gdb -c botphone core.28682

inside gdb you can do things such as back-trace.

> GNU gdb 6.6-1mdv2007.1 (Mandriva Linux release 2007.1)
> Copyright (C) 2006 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 "i586-mandriva-linux-gnu"...
> Using host libthread_db library "/lib/i686/libthread_db.so.1".
>
> warning: Can't read pathname for load map: Input/output error.
> Reading symbols from /usr/local/lib/liblinphone.so.1...done.
> Loaded symbols for /usr/local/lib/liblinphone.so.1
> Reading symbols from /lib/libusb-0.1.so.4...done.
> Loaded symbols for /lib/libusb-0.1.so.4
> Reading symbols from /lib/libdl.so.2...done.
> Loaded symbols for /lib/libdl.so.2
> Reading symbols from /lib/i686/libpthread.so.0...done.
> Loaded symbols for /lib/i686/libpthread.so.0
> Reading symbols from /lib/i686/libc.so.6...done.
> Loaded symbols for /lib/i686/libc.so.6
> Reading symbols from /usr/local/lib/libquickstream.so.0...done.
> Loaded symbols for /usr/local/lib/libquickstream.so.0
> Reading symbols from /usr/lib/libosip2.so.3...done.
> Loaded symbols for /usr/lib/libosip2.so.3
> Reading symbols from /usr/lib/libosipparser2.so.3...done.
> Loaded symbols for /usr/lib/libosipparser2.so.3
> Reading symbols from /lib/libnsl.so.1...done.
> Loaded symbols for /lib/libnsl.so.1
> Reading symbols from /lib/i686/librt.so.1...done.
> Loaded symbols for /lib/i686/librt.so.1
> Reading symbols from /lib/libintl.so.8...done.
> Loaded symbols for /lib/libintl.so.8
> Reading symbols from /lib/ld-linux.so.2...done.
> Loaded symbols for /lib/ld-linux.so.2
> Reading symbols from /usr/local/lib/libmediastreamer.so.0...done.
> Loaded symbols for /usr/local/lib/libmediastreamer.so.0
> Reading symbols from /usr/local/lib/libortp.so.5...done.
> Loaded symbols for /usr/local/lib/libortp.so.5
> Reading symbols from /usr/lib/libasound.so.2...done.
> Loaded symbols for /usr/lib/libasound.so.2
> Reading symbols from /usr/lib/libspeex.so.1...done.
> Loaded symbols for /usr/lib/libspeex.so.1
> Reading symbols from /lib/i686/libm.so.6...done.
> Loaded symbols for /lib/i686/libm.so.6
> Reading symbols from /lib/libnss_files.so.2...done.
> Loaded symbols for /lib/libnss_files.so.2
> Reading symbols from /lib/libnss_nis.so.2...done.
> Loaded symbols for /lib/libnss_nis.so.2
> Reading symbols from /lib/libnss_dns.so.2...done.
> Loaded symbols for /lib/libnss_dns.so.2
> Reading symbols from /lib/libresolv.so.2...done.
> Loaded symbols for /lib/libresolv.so.2
> Reading symbols from /lib/libgcc_s.so.1...done.
> Loaded symbols for /lib/libgcc_s.so.1
> Core was generated by `./botphone -v -v -v -c /home/luca/.linphonerc -C
> /home/luca/agenda'.
> Program terminated with signal 11, Segmentation fault.
> #0  0x080593ea in SYSTEM_GETERRNO$$LONGINT ()
> (gdb) bt f
> #0  0x080593ea in SYSTEM_GETERRNO$$LONGINT ()
> No symbol table info available.
> #1  0x08060442 in SYSTEM_REENABLE_SIGNAL$LONGINT$$BOOLEAN ()
> No symbol table info available.
> #2  0x08060580 in SYSTEM_SIGNALTORUNERROR$LONGINT$PSIGINFO$PUCONTEXT ()
> No symbol table info available.
> #3  0x08059bec in ?? ()
> No symbol table info available.
> #4  0x0000000b in ?? ()
> No symbol table info available.
> #5  0xb6b5412c in ?? ()
> No symbol table info available.
> #6  0xb6b541ac in ?? ()
> No symbol table info available.
> #7  0x0000000b in ?? ()
> No symbol table info available.
> #8  0x00000000 in ?? ()
> No symbol table info available.
> (gdb)
>
>
> Bye
> --
> Luca


Ido
-- 
http://ik.homelinux.org/