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classification
Title: Pdb does not stop at a breakpoint
Type: behavior Stage:
Components: Library (Lib) Versions: Python 3.2, Python 3.3, Python 2.7
process
Status: open Resolution:
Dependencies: Superseder:
Assigned To: Nosy List: xdegaye
Priority: normal Keywords: patch

Created on 2012-05-08 13:00 by xdegaye, last changed 2022-04-11 14:57 by admin.

Files
File name Uploaded Description Edit
pdb_default.patch xdegaye, 2012-05-08 13:00
pdb_default_2.patch xdegaye, 2012-05-13 15:48
Messages (2)
msg160202 - (view) Author: Xavier de Gaye (xdegaye) * (Python triager) Date: 2012-05-08 13:00
When a breakpoint is set in one of the frames of the frame stack, Pdb
may not stop at that breakpoint when the frame does not have a trace
function. This problem is closely related to issue 13183 and issue
14728. The following scenario demonstrates this problem.


====   main.py   ================================
import bar

def foo():
    bar.bar()
    x = 1

foo()
====   bar.py  ==================================
def bar():
    pass
=================================================
$ python3 -m pdb main.py 
> /path_to/main.py(1)<module>()
-> import bar
(Pdb) import sys; print(sys.version)
3.2.2 (default, Dec 27 2011, 17:35:55) 
[GCC 4.3.2]
(Pdb) break bar.bar
Breakpoint 1 at /path_to/bar.py:1
(Pdb) continue
> /path_to/bar.py(2)bar()
-> pass
(Pdb) break main.py:5
Breakpoint 2 at /path_to/main.py:5
(Pdb) continue
The program finished and will be restarted
> /path_to/main.py(1)<module>()
-> import bar
(Pdb) quit
=================================================


The attached patch fixes this problem. A test case is included in the
patch. The patch is made against the proposed fix of issue 14728 (i.e.
assumes this patch is applied), the reason being that self._curframe
must be correctly set. Actually this issue and issue 14728 should
probably be merged.

Note that the trace function does not need anymore to be set in all
the frames of the frame stack in set_trace(), so setting the trace
function has been removed from the while loop.
msg160518 - (view) Author: Xavier de Gaye (xdegaye) * (Python triager) Date: 2012-05-13 15:48
Uploaded pdb_default_2.patch that corrects the initial patch: the
trace function must be set in all frames whose co_filename is the
breakpoint file name and not just the first frame of this set.
History
Date User Action Args
2022-04-11 14:57:30adminsetgithub: 58956
2012-05-13 15:48:49xdegayesetfiles: + pdb_default_2.patch

messages: + msg160518
2012-05-08 13:00:17xdegayecreate