[PD-dev] debugging pd with gdb or ddd

[Hans-Christoph Steiner]

On May 26, 2006, at 9:12 PM, David Plans Casal wrote:

>
> On 26 May 2006, at 19:48, Hans-Christoph Steiner wrote:
>
>> Can anyone give a brief HOWTO for using ddd or gdb with Pd?
>
> I realise this is -too- basic, perhaps, but...
>
> I use GDB by simply calling gdb from a shell, or from emacs. Then   
> running pd form either /usr/local/lib/pd/bin/pd (or similar) or  
> from within the Pd.app (in OSX) is simply a matter or giving gdb  
> the pd program as a flag, such as:
>
> 'gdb bin/pd'
>
> The last message should read:
>
> "This GDB was configured as "powerpc-apple-darwin"...Reading  
> symbols for shared libraries ....... done"
>
> Then you can call:
>
> 'run'
>
> And you should see something like:
>
> <snip>
> (gdb) run
> Starting program: /Applications/Pd.app/Contents/Resources/bin/pd
> Reading symbols for shared libraries ........done
> Pd version 0.39-2extended-test1
> </snip>
>
> Once you see: "compiled 01:26:33 Feb 27 2006"
>
> Pd should then start, and gdb should give you nice output...
>
> (sorry if all this is obvious)
>
> d

Ok, that's a start, I've gotten that far before.  I want to be able  
to set breakpoints in the functions of my object.  But when I do this:

(gdb) break hid_free
Function "hid_free" not defined.
Make breakpoint pending on future shared library load? (y or [n]) y
Breakpoint 1 (hid_free) pending.
(gdb) run
Starting program: /Users/hans/cvs/pure-data/pd-0.39-2/bin/pd
EMACSCLIENTReading symbols for shared  
libraries .............................................................. 
.... done
Reading symbols for shared libraries .. done
Reading symbols for shared libraries . done
[hid] 0.7, written by Hans-Christoph Steiner <hans at eds.org>
         compiled on May 26 2006 at 21:38:09
pddp/pddp_open all_about_hid
... couldn't create
hid_free
hid_close
stop_poll
hid_close_device
error: [hid]: no such device, "0", only 0 devices found

[hid] closed device -1073754448
hid_platform_specific_free
RELEASE ALL hid_instance_count: 0


It doesn't break when hid_free() is called.

.hc

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