If Python is compiled with gcc -O3, gdb is unable to get the f argument of PyEval_EvalFrameEx(). It is possible to retrieve "f" from the caller, PyEval_EvalCodeEx().

Attached patch tries to implement this idea and enable more test_gdb tests on optimized Python.

The patch has a problem because some tests fails if Python is not optimized (Python compiled in debug mode).

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The patch fix other minor bugs in libpython.py related to optimized Python.

New changeset 0b03cb97dac0 by Victor Stinner in branch '3.2':
Issue #13628: python-gdb.py is now able to retrieve more frames in the Python
http://hg.python.org/cpython/rev/0b03cb97dac0

New changeset 5e3a172bba89 by Victor Stinner in branch 'default':
(Merge 3.2) Issue #13628: python-gdb.py is now able to retrieve more frames in
http://hg.python.org/cpython/rev/5e3a172bba89

New changeset 1cc8e9565339 by Victor Stinner in branch '2.7':
Issue #13628: python-gdb.py is now able to retrieve more frames in the Python
http://hg.python.org/cpython/rev/1cc8e9565339

> It is possible to retrieve "f" from the caller, PyEval_EvalCodeEx()

It does not always work, but it works sometimes, so it's better to try :-)

I applied my fix to Python 2.7, 3.2 and 3.3. lipython.py of Python 2.7 is outdated, it should be resynchronized with the one of Python 3.3. I will do that later and in another issue.