Re: [Pydev-code] Is PyDev debugger using pdb?

[Fabio Z. <fa...@es...>]

Hi Uri,

PyDev does not use pdb in the backend.

It uses the Python tracing directly (i.e.: sys.settrace and
threading.settrace). This takes place at pydevd.PyDB.run
(on pydevd_tracing.SetTrace(self.trace_dispatch)
and threading.settrace(self.trace_dispatch)).

After the call to settrace, all the calls to a new frame should go
through pydevd.PyDB.trace_dispatch (and then if the debugger determines
it's a frame it should be tracing -- as the debugger is very optimized in
regards to only tracing the places where a breakpoint is added -- the calls
should go through pydevd_frame.PyDBFrame.trace_dispatch).

So, the first thing I'd do is do some prints on the trace_dispatch calls to
get familiar with it on a small program and then move on to checking what
may be happening at google app engine (the main thing there is probably
getting the settrace in place -- you may want to check if the remote
debugger works as it emulates a breakpoint in code).

Cheers,

Fabio



On Sat, Jun 1, 2013 at 3:27 AM, Uri London <ur...@lo...> wrote:

> Referring to googleappengine project in Google Code, issue 9012:
>
>
> https://code.google.com/p/googleappengine/issues/detail?id=9012&q=Type%3DDefect&colspec=IDType Component Status Stars Summary Language Priority Owner Log
>
> Currently, PyDev debugger is broken in new dev_appserver.
> Issue is marked as 'MoreInfoRequired', with the question being asked is:
> Do you know if PyDev used pdb in the backend?
>
> I'd like to get this issue some traction, but I've failed to figure out in
> the PyDev code how the debugger is implemented. Can you please describe or
> get me some pointers where I can start reading?
>
>
>
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