[gdb 0005232]: gdb can't read core file

[Mantis Bug Tracker via bug-notifications]

The following issue has been ASSIGNED. 
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https://www.opencsw.org/mantis/view.php?id=5232 
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Reported By:                hjb
Assigned To:                pfelecan
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Project:                    gdb
Issue ID:                   5232
Category:                   regular use
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
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Date Submitted:             2015-02-18 09:38 CET
Last Modified:              2015-02-18 18:39 CET
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Summary:                    gdb can't read core file
Description: 
The provided gdb isn't able to read core files. Here's an example:

root at ulysses# echo $BASH
/usr/bin/bash

root at ulysses# /usr/bin/gcore $$
gcore: core.20121 dumped

root at ulysses# file core.20121 
core.20121:     ELF 32-bit MSB core file SPARC Version 1, from 'bash'

root at ulysses# /opt/csw/bin/gdb /usr/bin/bash core.20121 
GNU gdb (GDB) 7.7
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.10".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
<http://www.gnu.org/software/gdb/documentation/>.
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from /usr/bin/bash...(no debugging symbols found)...done.

warning: Couldn't find general-purpose registers in core file.

warning: Wrong size fpregset in core file.
[Thread debugging using libthread_db enabled]
[New Thread 1 (LWP 1)]
Core was generated by `-bash'.

warning: Couldn't find general-purpose registers in core file.

warning: Wrong size fpregset in core file.
PC not available
#-1 <unavailable> in ?? ()
(gdb)


Let's compare that with this really old gdb i've got from sunfreeware years
ago, iirc:

root at ulysses# ./gdb /usr/bin/bash core.20121
GNU gdb 6.2.1
Copyright 2004 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-solaris2.10"...(no debugging symbols
found)...
Core was generated by `-bash'.
Reading symbols from /lib/libcurses.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib/libcurses.so.1
Reading symbols from /lib/libsocket.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib/libsocket.so.1
Reading symbols from /lib/libnsl.so.1...(no debugging symbols
found)...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libdl.so.1...
warning: Lowest section in /lib/libdl.so.1 is .hash at 000000b4
(no debugging symbols found)...done.
Loaded symbols for /lib/libdl.so.1
Reading symbols from /lib/libc.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.1
Reading symbols from /platform/sun4v/lib/libc_psr.so.1...(no debugging
symbols found)...done.
Loaded symbols for /platform/SUNW,SPARC-Enterprise-T5120/lib/libc_psr.so.1
https://www.opencsw.org/mantis/view.php?id=0  0x00000000 in ?? ()
(gdb)



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