reference environment variables from gdb scripts

Is there a way to reference an environment variable from a
gdbscript?
I'm hoping a gdb script command to load different script
files based on the
current environment variable.
I can see these variable using "show env" command.
But when I reference them
in a file like below, it gives me errors:

source $HOME/gdb.scripts
          

Is there a way to do something like this?

Thanks
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On Thu, 23 Aug 2007 23:19:44 +0200, rockwellkc wrote:
> 
> Is there a way to reference an environment variable
from a gdbscript?

Unaware.

> I'm hoping a gdb script command to load different
script files based on the
> current environment variable.

Set bash function and use the --command parameter?

> source $HOME/gdb.scripts

$HOME -> ~
and it should work.


Regards,
Jan

Hi,

I use .cshrc to update the current pointer
whenever I login to a 32 or 64 bit machine.
If so, I can keep .gdbinit as it is.

BTW, Is there a gdb script functional document?
Is there a gdb script test vector
(or a complete feature checklist)
for each gdb release?

Thanks,
Sheng-Liang

.gdbinit
source ~/.gdb/current/gdb_stl_utils
(ref: http://ww
w.stanford.edu/~afn/gdb_stl_utils/
 I try follow the above examples to make some changes for my
machine.
 I feel it is a little bit hard to debug the scripts.
If you have more gdb script examples, could you email me?
Thanks!)

.cshrc
if ( -f ~/.gdb/current ) then
rm ~/.gdb/current
endif
ln -s ~/.gdb/`uname -m`  ~/.gdb/current


/home/ssl/.gdb/i686
/home/ssl/.gdb/x86_64
/home/ssl/.gdb/current -> /home/ssl/.gdb/x86_64


Jan Kratochvil wrote:
> On Thu, 23 Aug 2007 23:19:44 +0200, rockwellkc wrote:
>   
>> Is there a way to reference an environment variable
from a gdbscript?
>>     
>
> Unaware.
>
>   
>> I'm hoping a gdb script command to load different
script files based on the
>> current environment variable.
>>     
>
> Set bash function and use the --command parameter?
>
>   
>> source $HOME/gdb.scripts
>>     
>
> $HOME -> ~
> and it should work.
>
>
> Regards,
> Jan
>   

> Date: Fri, 24 Aug 2007 09:37:25 -0700
> From: Sheng-Liang Song <sslbaymicrosystems.com>
> 
> BTW, Is there a gdb script functional document?

The GDB scripting commands are documented in the GDB user
manual.  See
the node "Sequences".

Eli Zaretskii wrote:
>> Date: Fri, 24 Aug 2007 09:37:25 -0700
>> From: Sheng-Liang Song <sslbaymicrosystems.com>
>>
>> BTW, Is there a gdb script functional document?
>>     
>
> The GDB scripting commands are documented in the GDB
user manual.  See
> the node "Sequences".
>   
Hi,

I am looking for a more detail document.
(just like this vim script doc with examples):
  htt
p://vimdoc.sourceforge.net/htmldoc/usr_41.html


What is the different between "." and
"->" operator in gdb script? 
(Looks like no difference to me. works the same.)

What operators does gdb 6.6 support?

Is a gdb script grammar like this one:
  http://www.nongnu.org/hcb/


$vec->_M_impl
STL vector does not have the member var _M_impl.
gdb) will report: There is no member or method named
_M_impl.

How do I check if $vec has the member _M_impl?

I would like to write a script like this:

if  isMember($vec,_M_impl)
  //do something
else
  //do something else
end


I have some examples that works on gdb.6.6 only.

define adder
  if $argc == 1
    print $arg0
  end
  if $argc == 2
    print $arg0 + $arg1
  end
  if $argc == 3
    print $arg0 + $arg1 + $arg2
  end
end

define p_stl_vector64
  set $vec = ($arg0)
  set $vec_begin = 0
  set $vec_size = $vec->_M_impl->_M_finish -
$vec->_M_impl->_M_start
  set $vec_end = $vec_size - 1
  if $argc == 3  
    set $vec_begin = ($arg1)
  end
  if $argc == 3
    set $vec_end  = ($arg2)
  end
  if ($vec_size != 0)
    set $i = 0
    while ($i <= $vec_end)
      printf "Vector Element %d:  ", $i
      p *($vec->_M_impl->_M_start+$i)
      set $i++
    end
  end
end


GNU gdb Red Hat Linux (6.3.0.0-1.132.EL4rh) 
(DOES NOT WORK!)

(gdb) adder 1 2 3
Invalid type combination in equality test.


GNU gdb 6.6  (works)
(gdb) adder 1 2 3
$1 = 6

Sheng-Liang Song <sslbaymicrosystems.com>
writes:
> gdb has "shell" command to switch to a unix
shell.
> After switch to a unix shell, can I call gdb
functions/commands?

No; you need to exit the shell before you can give more
commands to
GDB.

> Does gdb supports "pipe" command? Is there a
plan to add a "unix pipe"
> command to gdb debug prompt?

No; we don't have any plans to do so.

We're currently planning to add Python as a scripting
language to
GDB.  If that were to happen, the things you mention here
could be
done in a clean and general way.

This is a rookie question but here goes.....

Is there a list of available tool chains for GDB anywhere?

Jay

On Tue, 28 Aug 2007, McGuerty, Jay S. wrote:

> 
> This is a rookie question but here goes.....
> 
> Is there a list of available tool chains for GDB
anywhere?

Tool chains? What do you mean?

> 
> Jay
> 
> 

Best

-- 
Peter Toft, Ph.D. [ptolinuxbog.dk] http://petertoft.dk
Følg min Linux-blog på http://www.ver
sion2.dk/blogs/petertoft

"McGuerty, Jay S." <JAY.S.MCGUERTYsaic.com> writes:
> This is a rookie question but here goes.....
>
> Is there a list of available tool chains for GDB
anywhere?

No.  GDB is most widely tested against the GNU compiler,
linker, and
debugger.  I'd bet it works adequately with the Intel C
compiler.  I
expect it would take work to adapt GDB to understand the
DWARF
produced by other compilers.

(By the way, please don't start new threads by replying to
others'
messages; doing so makes it difficult for threaded mail
readers and
web archivers to properly group threads.)