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

[Luca Olivetti]

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
GNU gdb 6.6-1mdv2007.1 (Mandriva Linux release 2007.1)
Copyright (C) 2006 Free Software Foundation, Inc.
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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