gdb problem viewing variables

gdb problem viewing variables

[rimon]

Hi,

I'm using WDB 5.7 on HP Itanium 11.23.
'file' on my executable shows:
 ELF-32 executable object file - IA64

The problem is with viewing the contents of the variables.  
Following is a sequence that demonstrates this:

HP gdb 5.7 for HP Itanium (32 or 64 bit) and target HP-UX 11.2x.
Copyright 1986 - 2001 Free Software Foundation, Inc.
Hewlett-Packard Wildebeest 5.7 (based on GDB) is covered by the
GNU General Public License. Type "show copying" to see the conditions to
change it and/or distribute copies. Type "show warranty" for
warranty/support.
..
(gdb) stop in main
Breakpoint 1 at 0x400c5b0:1: file loader.cpp, line 902 from loader.
(gdb) run
Starting program: loader

Breakpoint 1, main (argc=Error accessing memory address 0xd08: Bad address.
) at loader.cpp:902
902      ll=new LclsLC_Library;
(gdb) print argc
Error accessing memory address 0xd08: Bad address.
(gdb) print &argc
$1 = (int *) 0xd08
(gdb) p ll
Error accessing memory address 0xcec: Bad address.
(gdb) p &ll
$1 = (LclsLC_Library **) 0xcec
(gdb)


See that both the parameter 'argc' and the local variable ll have a problem.

Now if I put a breakpoint in a function called by main, and then go up in
the stack to main, I CAN see argc.  See in the following sequence:

Breakpoint 2, Test (ll=Error accessing memory address 0xd28: Bad address.
) at loader.cpp:716
716      long lv,c,err = 0,j,k,ccv;
(gdb) where
#0  Test (ll=Error accessing memory address 0xd28: Bad address.
) at loader.cpp:716
#1  0x400c8a0:0 in main (argc=0, argv=0x7ffff9b8) at loader.cpp:911
(gdb) up
#1  0x400c8a0:0 in main (argc=0, argv=0x7ffff9b8) at loader.cpp:911
911      Test(ll,ts);
(gdb) p argc
$5 = 0
(gdb) p &argc
$6 = (int *) 0x7efff220
(gdb)



You may notice though that when I'm in the subprocedure I can't view the
parameters of this subprocedure, such as ll .

Any ideas?

Thanks,

RO
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Re: gdb problem viewing variables

[Daniel Jacobowitz]

On Wed, Nov 21, 2007 at 01:57:42AM -0800, rimon wrote:
> 
> Hi,
> 
> I'm using WDB 5.7 on HP Itanium 11.23.

This is not a GDB release; it's based on GDB, but HP have done a lot
of work on it, and it is not based on current GDB sources.  We can't
help you with Wildebeest.

-- 
Daniel Jacobowitz
CodeSourcery

Re: gdb problem viewing variables

[rimon]

Daniel Jacobowitz-2 wrote:
> 
> This is not a GDB release; it's based on GDB, but HP have done a lot
> of work on it, and it is not based on current GDB sources.  We can't
> help you with Wildebeest.
> 

Understood.
In case anyone reading this thread is interested - I've been contacted by HP
wdb help.  The source of the problem is that I am compiling with gcc 4.2.1
and they say that "Currently we give minimal support for gcc4.1 and higher
versions.".  Nevertheless they have reproduced the problem and are trying to
help with their beta version - I hope it helps.
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