Re: [eigen] gdb Eigen Pretty printers

[Benoit Jacob <jacob.benoit.1@xxxxxxxxx>]

ok, now it works. Cool!

CC'ing Hauke to ping him about putting that stuff in Hg --- see my
proposal in the first email in this thread. Once this is sorted, you
can add your stuff in Hg and work there.

Benoit



2009/12/8 Benjamin Schindler <bschindler@xxxxxxxxxxx>:
> Hi
>
> I just fixed that bug. The problem was that the script did not handle
> references.
>
> Attached is a fixed version of the script. Feedback very welcome :)
>
> Cheers
> Benjamin
> Benjamin Schindler wrote:
>> Hi
>>
>>
>> Benoit Jacob wrote:
>>
>>> Hi,
>>>
>>> 2009/12/8 Benjamin Schindler <bschindler@xxxxxxxxxxx>:
>>>
>>>
>>>> Hi
>>>>
>>>> Finally a real contribution to eigen - it was about time. I just wrote a
>>>> pretty printer for Eigen::Matrix gdb-7.0 and later.
>>>>
>>>>
>>> Very nice!
>>>
>>>
>>>
>>>> To use it:
>>>>
>>>> * create a directory and put the file as well as an empty __init__.py in
>>>> that directory
>>>> * Create a ~/.gdbinit file, that contains the following:
>>>>
>>>> python
>>>> import sys
>>>> sys.path.insert(0, '/path/to/eigen/printer/directory')
>>>> from printers import register_eigen_printers
>>>> register_eigen_printers (None)
>>>> end
>>>>
>>>>
>>> I tried it on the attached file a.cpp,
>>>
>>>   $ g++ a.cpp -I ../eigen -o a -g3
>>>   $ gdb ./a
>>>   > start
>>>   > step
>>>   (then press Enter several times)
>>>
>>> But eventually I get this python error message:
>>>
>>> (gdb)
>>> main () at a.cpp:13
>>> 13        f(m,n);
>>> (gdb)
>>> f (m=Traceback (most recent call last):
>>>   File "/home/bjacob/cuisine/printers.py", line 105, in lookup_function
>>>     return pretty_printers_dict[function](val)
>>>   File "/home/bjacob/cuisine/printers.py", line 80, in <lambda>
>>>     pretty_printers_dict[re.compile('^Eigen::Matrix<.*>$')] = lambda
>>> val: EigenMatrixPrinter(val)
>>>   File "/home/bjacob/cuisine/printers.py", line 24, in __init__
>>>     m = regex.findall(tag)[0][1:-1]
>>> TypeError: expected string or buffer
>>> ..., n=Traceback (most recent call last):
>>>   File "/home/bjacob/cuisine/printers.py", line 105, in lookup_function
>>>     return pretty_printers_dict[function](val)
>>>   File "/home/bjacob/cuisine/printers.py", line 80, in <lambda>
>>>     pretty_printers_dict[re.compile('^Eigen::Matrix<.*>$')] = lambda
>>> val: EigenMatrixPrinter(val)
>>>   File "/home/bjacob/cuisine/printers.py", line 24, in __init__
>>>     m = regex.findall(tag)[0][1:-1]
>>> TypeError: expected string or buffer
>>> ...) at a.cpp:7
>>> 7         m = m * n;
>>>
>>>
>>> Any idea?
>>>
>>>
>> I just tested your file here and got that:
>> bschindl@hundertwasser /local/bschindler/projects/test/build $ gdb ./test
>>
>> (gdb) start
>> Temporary breakpoint 1 at 0x4007fa: file a.cpp, line 12.
>> Starting program: /local/bschindler/projects/test/build/test
>>
>> Temporary breakpoint 1, main () at a.cpp:12
>> 12        Matrix2d m, n;
>> (gdb) n
>> 13        f(m,n);
>> (gdb) p m
>> $1 = Eigen::Matrix<double,2,2> = {
>>   [0, 0] = 2.0747911307212309e-317,
>>   [1, 0] = 0,
>>   [0, 1] = 6.9533558073425197e-310,
>>   [1, 1] = 0
>> }
>> (gdb) p n
>> $2 = Eigen::Matrix<double,2,2> = {
>>   [0, 0] = 6.9533486693516308e-310,
>>   [1, 0] = 2.0748148458722313e-317,
>>   [0, 1] = 6.9533558073429149e-310,
>>   [1, 1] = 6.9533491761380836e-310
>> }
>> (gdb)
>>
>> In your output I don't really see what produced the output you got there
>> - did you try to print a variable or did you do something else?
>>
>> I assume this problem has to do with the fact you are on eigen-devel
>> (You include <Eigen/Eigen> which is not available with stable).
>> I'll retry with unstable in a sec
>>
>>>
>>>
>>>> Notes:
>>>>
>>>> - It currently only supports Eigen::Matrix and no other type (such as
>>>> quaternions etc). Patches welcome :)
>>>> - I wrote it using the stable branch of eigen. I don't know whether it
>>>> works with hg
>>>> - It's still kind of hacky, mostly because of the limitations of the
>>>> gdb.python framework
>>>>
>>>>
>>> OK
>>>
>>>
>>>
>>>> It seems that the gdb hackers want the pretty printer scripts included
>>>> in the respective patches, so my final goal would be to have it in eigen-hg
>>>>
>>>>
>>> I don't understand what you mean by "in the respective patches" ?
>>>
>>>
>> Sorry - I typed too fast. They want that the scripts are packaged with
>> the respective libraries and not included in gdb as i.e. cmake does it.
>>
>>> I agree that this is worth having in Hg. Maybe we should create a
>>> top-level directory "debug" with a subdirectory "gdb" containing your
>>> stuff. Then Hauke's work would go into another subdirectory "msvc".
>>> Each would have a short README file, so Hauke's documentation on the
>>> wiki could go there, or could be linked to from there. Opinions?
>>>
>>>
>> Sounds good to me
>>
>> Benjamin
>>
>>> Benoit
>>>
>>>
>>
>>
>>
>>
>
>