pax_global_header00006660000000000000000000000064113150360520014506gustar00rootroot0000000000000052 comment=e060e42aebb5f103eeb7a9737a72cd752ca0952c pytracer-0.2.3/000077500000000000000000000000001131503605200133415ustar00rootroot00000000000000pytracer-0.2.3/.cvsignore000066400000000000000000000000441131503605200153370ustar00rootroot00000000000000*~ *.pyc build dist tracer.egg-info pytracer-0.2.3/.gitignore000066400000000000000000000000441131503605200153270ustar00rootroot00000000000000/*~ /*.pyc /build /dist /*.egg-info pytracer-0.2.3/COPYING000066400000000000000000001045131131503605200144000ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 3, 29 June 2007 Copyright (C) 2007 Free Software Foundation, Inc. Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The GNU General Public License is a free, copyleft license for software and other kinds of works. 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IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. 17. Interpretation of Sections 15 and 16. If the disclaimer of warranty and limitation of liability provided above cannot be given local legal effect according to their terms, reviewing courts shall apply local law that most closely approximates an absolute waiver of all civil liability in connection with the Program, unless a warranty or assumption of liability accompanies a copy of the Program in return for a fee. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively state the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . Also add information on how to contact you by electronic and paper mail. If the program does terminal interaction, make it output a short notice like this when it starts in an interactive mode: Copyright (C) This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, your program's commands might be different; for a GUI interface, you would use an "about box". You should also get your employer (if you work as a programmer) or school, if any, to sign a "copyright disclaimer" for the program, if necessary. For more information on this, and how to apply and follow the GNU GPL, see . The GNU General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Lesser General Public License instead of this License. But first, please read . pytracer-0.2.3/Makefile000066400000000000000000000011301131503605200147740ustar00rootroot00000000000000# Compatibility for us old-timers. PHONY=check clean dist distclean test all: check check: python ./setup.py nosetests clean: python ./setup.py $@ dist: python ./setup.py sdist bdist # It is too much work to figure out how to add a new command to distutils # to do the following. I'm sure distutils will someday get there. DISTCLEAN_FILES = build dist *.egg-info *.pyc *.so py*.py distclean: clean -rm -fr $(DISTCLEAN_FILES) || true install: python ./setup.py install test: check ChangeLog: svn2cl --authors=svn2cl_usermap http://pytracer.googlecode.com/svn/trunk -o $@ .PHONY: $(PHONY) pytracer-0.2.3/NEWS000066400000000000000000000010171131503605200140370ustar00rootroot000000000000000.2.3 - 12-25-09 * add_hook bug fixes boolean option 'front' changed to integer option 'position' 0.2.2 - 03-08-09 Ron Frankel - 1 release * Add EVENT2SHORT: event name to a short string used in pydbgr For example, 'call' is '->'. * Leave a mark in the frame so clients like pydbgr can know to omit listing this kind of frame (for in thread debugging) * Add a debug flag for showing all events that come through. * Make GPL v3 Above changes in are support of pydbgr 0.2.0 - 12-25-08 * Initial googlecode release pytracer-0.2.3/README.txt000066400000000000000000000005121131503605200150350ustar00rootroot00000000000000Centralized Trace management using sys.settrace. We allow several trace hooks to get registered and unregistered and allow tracing to be turned on and off temporarily without losing the trace hooks. You can also indicate filters on events for which trace hooks should fire and mark methods that should automatically be ignored. pytracer-0.2.3/VERSION000066400000000000000000000000061131503605200144050ustar00rootroot000000000000000.2.3 pytracer-0.2.3/__init__.py000066400000000000000000000013051131503605200154510ustar00rootroot00000000000000# This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """ Copyright (C) 2006, 2008 Rocky Bernstein """ pytracer-0.2.3/__pkginfo__.py000066400000000000000000000035521131503605200161510ustar00rootroot00000000000000# Copyright (C) 2008, 2009 Rocky Bernstein # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """pytracer packaging information""" copyright = '''Copyright (C) 2008, 2009 Rocky Bernstein .''' classifiers = ['Development Status :: 4 - Beta', 'Environment :: Console', 'Intended Audience :: Developers', 'License :: OSI Approved :: GNU General Public License (GPL)', 'Operating System :: OS Independent', 'Programming Language :: Python', 'Topic :: Software Development :: Debuggers', 'Topic :: Software Development :: Libraries :: Python Modules', ] # The rest in alphabetic order author = "Rocky Bernstein" author_email = "rocky@gnu.org" ftp_url = None license = 'GPL' modname = 'tracer' short_desc = 'Centralized sys.settrace management' version = open('VERSION').readline().rstrip('\n') web = 'http://code.google.com/p/pytracer' package_dir = {'': 'tracer'} zip_safe = False # tracebacks in zip files are funky and not debuggable import os def read(*rnames): return open(os.path.join(os.path.dirname(__file__), *rnames)).read() long_description = ( read("README.txt") + '\n\n' + read("NEWS") ) pytracer-0.2.3/setup.cfg000066400000000000000000000010201131503605200151530ustar00rootroot00000000000000[nosetests] # Location of test programs. "where" can be given several times. # If "where is a directory, then that's the working directory. where=./test # Our tests are also executable since they are allowed to be run # individually. By default nose excludes these. exe=on # Show individual tests run verbosity=2 cover-package=nose #debug=nose.loader # pdb=on detailed-errors=on [bdist_rpm] packager = Rocky Bernstein provides = pytracer [upload] show_response = 1 [aliases] release = egg_info -RDb '' pytracer-0.2.3/setup.py000077500000000000000000000020521131503605200150550ustar00rootroot00000000000000#!/usr/bin/env python """ distutils setup (setup.py) for pytracer. This gets a bit of package info from __pkginfo__.py file """ # Get the required package information from __pkginfo__ import author, author_email, classifiers, \ license, modname, package_dir, \ short_desc, version, web, zip_safe from setuptools import setup import os top_dir = os.path.dirname(__file__) README = os.path.join(top_dir, 'README.txt') # Description in package will come from the README file. long_description = open(README).read() + '\n\n' setup( author = author, author_email = author_email, classifiers = classifiers, description = short_desc, license = license, long_description = long_description, name = modname, package_dir = package_dir, py_modules = ['tracer', 'tracefilter'], test_suite = 'nose.collector', url = web, version = version, zip_safe = zip_safe ) pytracer-0.2.3/svn2cl_usermap000066400000000000000000000000401131503605200162210ustar00rootroot00000000000000rocky.bernstein:Rocky Bernstein pytracer-0.2.3/test/000077500000000000000000000000001131503605200143205ustar00rootroot00000000000000pytracer-0.2.3/test/.cvsignore000066400000000000000000000000111131503605200163100ustar00rootroot00000000000000*~ *.pyc pytracer-0.2.3/test/.gitignore000066400000000000000000000000131131503605200163020ustar00rootroot00000000000000/*~ /*.pyc pytracer-0.2.3/test/Makefile000066400000000000000000000002141131503605200157550ustar00rootroot00000000000000# Whatever it is you want to do, it should be forwarded to the # to top-level irectories PHONY=check all all: check %: $(MAKE) -C .. $@ pytracer-0.2.3/test/test-add-hook.py000077500000000000000000000027541131503605200173500ustar00rootroot00000000000000#!/usr/bin/env python # -*- Python -*- "Unit test for Tracer's add-hook" import operator, os, sys, unittest top_builddir = os.path.join(os.path.dirname(__file__), '..', 'tracer') if top_builddir[-1] != os.path.sep: top_builddir += os.path.sep sys.path.insert(0, top_builddir) import tracer, tracefilter trace_lines = [] ignore_filter = tracefilter.TraceFilter([tracer.stop]) def trace_dispatch1(frame, event, arg): return trace_dispatch1 def trace_dispatch2(frame, event, arg): return trace_dispatch2 def trace_dispatch3(frame, event, arg): return trace_dispatch3 class TestTraceAddHook(unittest.TestCase): def setUp(self): global ignore_filter trace_lines = [] ignore_tracefilter = tracefilter.TraceFilter() return def test_add_hook(self): """Basic sanity and status testing.""" self.assertEqual(0, tracer.size()) self.assertEqual(1, tracer.add_hook(trace_dispatch1)) self.assertEqual(2, tracer.add_hook(trace_dispatch2)) self.assertEqual(trace_dispatch1, tracer.HOOKS[0][0]) self.assertEqual(trace_dispatch2, tracer.HOOKS[1][0]) self.assertEqual(3, tracer.add_hook(trace_dispatch3, {'position': 0})) self.assertEqual(trace_dispatch3, tracer.HOOKS[0][0]) self.assertEqual(trace_dispatch1, tracer.HOOKS[1][0]) self.assertEqual(trace_dispatch2, tracer.HOOKS[2][0]) return if __name__ == '__main__': unittest.main() pytracer-0.2.3/test/test-basic.py000077500000000000000000000133161131503605200167370ustar00rootroot00000000000000#!/usr/bin/env python # -*- Python -*- "Unit test for Tracer" import operator, os, sys, unittest top_builddir = os.path.join(os.path.dirname(__file__), '..', 'tracer') if top_builddir[-1] != os.path.sep: top_builddir += os.path.sep sys.path.insert(0, top_builddir) import tracer, tracefilter trace_lines = [] ignore_filter = tracefilter.TraceFilter([tracer.stop]) def my_trace_dispatch(frame, event, arg): """A pure-function trace hook""" global trace_lines if ignore_filter.is_included(frame): return None Entry = tracer.superTuple('line_entry', 'frame', 'event', 'arg', 'filename', 'lineno', 'name') filename = frame.f_code.co_filename lineno = frame.f_lineno name = frame.f_code.co_name entry = Entry(frame, event, arg, filename, lineno, name) trace_lines += (entry,) return my_trace_dispatch class TestTracer(unittest.TestCase): def method_trace_dispatch(self, frame, event, arg): """A method-based trace hook""" return method_trace_dispatch def setUp(self): global ignore_filter trace_lines = [] ignore_tracefilter = tracefilter.TraceFilter() return def test_event2short_sanity(self): t = tracer.EVENT2SHORT.keys() t.sort() self.assertEqual(tracer.ALL_EVENT_NAMES, tuple(t), "EVENT2SHORT.keys() should match ALL_EVENT_NAMES") return def test_option_set(self): self.assertTrue(tracer.option_set({'opt': True}, 'opt', {'opt': False})) self.assertTrue(tracer.option_set(None, 'opt', {'opt': True})) self.assertFalse(tracer.option_set({'opt': True}, 'notthere', {'opt': True, 'notthere': False})) self.assertEqual(None, tracer.option_set({'opt': True}, 'notthere', {})) return def test_basic(self): """Basic sanity and status testing.""" tracer.HOOKS = [] self.assertEqual(0, tracer.size()) self.assertEqual(False, tracer.is_started()) tracer.start() self.assertEqual(True, tracer.is_started()) tracer.stop() self.assertEqual(False, tracer.is_started()) self.assertEqual(1, tracer.add_hook(my_trace_dispatch, {'backlevel': 1})) self.assertEqual(0, len(trace_lines)) tracer.start() self.assertEqual(0, len(trace_lines)) self.assertEqual(True, tracer.is_started()) self.assertEqual(0, tracer.remove_hook(my_trace_dispatch, stop_if_empty=True)) self.assertEqual(False, tracer.is_started()) self.assertEqual(1, tracer.add_hook(my_trace_dispatch, {'start': True, 'backlevel': 1})) self.assertEqual(True, tracer.is_started()) tracer.clear_hooks_and_stop() return def test_errors(self): """Test various error conditions.""" # 5 is not a function self.assertRaises(TypeError, tracer.add_hook, *(5,)) # test_errors has the wrong number of args self.assertRaises(TypeError, tracer.add_hook, *(self.test_errors,)) def wrong_fn_args(a, b): pass self.assertRaises(TypeError, tracer.add_hook, *(wrong_fn_args,)) tracer.clear_hooks self.assertEqual(1, tracer.add_hook(self.method_trace_dispatch)) return # FIXME: reinstate after cleaning pytracer more def test_trace(self): """Test that trace hook is triggering event callbacks.(No filtering.)""" tracer.clear_hooks_and_stop() self.assertEqual(1, tracer.add_hook(my_trace_dispatch, {'start': True, 'backlevel': 1})) def squares(): j = 1 for i in range(5): j += j + 2 pass return squares() tracer.stop() global trace_lines import pprint # for entry in trace_lines: # print entry.event, entry.filename, entry.lineno, entry.name self.assertTrue(len(trace_lines) >= 5, 'Should have captured some trace output') for i, right in [(-1, ('return', 'squares',)), (-2, ('line', 'squares',))]: self.assertEqual(right, (trace_lines[i].event, trace_lines[i].name,)) return def test_trace_filtering(self): """Test that trace hook is triggering event callbacks with filtering.""" global ignore_filter ignore_filter = tracefilter.TraceFilter() tracer.clear_hooks_and_stop() self.assertEqual(1, tracer.add_hook(my_trace_dispatch, {'start': True, 'event_set': frozenset(('call',))})) def foo(): pass foo() tracer.stop() global trace_lines import pprint # for entry in trace_lines: # print entry.event, entry.filename, entry.lineno, entry.name self.assertTrue(len(trace_lines) >= 2, 'Should have captured some trace output') for i, right in [(-1, ('call', 'stop',)), (-2, ('call', 'foo', )) ]: self.assertEqual(right, (trace_lines[i].event, trace_lines[i].name,)) return if __name__ == '__main__': unittest.main() pytracer-0.2.3/test/test-filter.py000066400000000000000000000014071131503605200171360ustar00rootroot00000000000000#!/usr/bin/env python # -*- Python -*- "Unit test for Tracer" import inspect, operator, os, sys, unittest top_builddir = os.path.join(os.path.dirname(__file__), '..', 'tracer') if top_builddir[-1] != os.path.sep: top_builddir += os.path.sep sys.path.insert(0, top_builddir) from tracefilter import * trace_lines = [] class TestFilter(unittest.TestCase): def test_basic(self): filter = TraceFilter([add_to_set]) self.assertFalse(filter.is_included(to_f_code)) self.assertTrue(filter.is_included(add_to_set)) self.assertFalse(filter.is_included(inspect.currentframe())) filter.remove_include(add_to_set) self.assertFalse(filter.is_included(add_to_set)) return if __name__ == '__main__': unittest.main() pytracer-0.2.3/test/test-remove.py000066400000000000000000000012511131503605200171430ustar00rootroot00000000000000#!/usr/bin/env python # -*- Python -*- "Unit test for Tracer" import operator, os, sys, unittest top_builddir = os.path.join(os.path.dirname(__file__), '..', 'tracer') if top_builddir[-1] != os.path.sep: top_builddir += os.path.sep sys.path.insert(0, top_builddir) import tracer, tracefilter trace_lines = [] ignore_filter = tracefilter.TraceFilter([tracer.stop]) class TestRemove(unittest.TestCase): def test_remove(self): self.assertEquals(None, tracer.remove_hook(tracer.null_trace_hook)) tracer.clear_hooks() self.assertEquals(None, tracer.remove_hook(tracer.null_trace_hook)) return if __name__ == '__main__': unittest.main() pytracer-0.2.3/tracer/000077500000000000000000000000001131503605200146215ustar00rootroot00000000000000pytracer-0.2.3/tracer/.cvsignore000066400000000000000000000000311131503605200166130ustar00rootroot00000000000000*.pyc *~ tracer.egg-info pytracer-0.2.3/tracer/.gitignore000066400000000000000000000000341131503605200166060ustar00rootroot00000000000000/*.pyc /*~ /tracer.egg-info pytracer-0.2.3/tracer/Makefile000066400000000000000000000002141131503605200162560ustar00rootroot00000000000000# Whatever it is you want to do, it should be forwarded to the # to top-level irectories PHONY=check all all: check %: $(MAKE) -C .. $@ pytracer-0.2.3/tracer/__init__.py000066400000000000000000000001411131503605200167260ustar00rootroot00000000000000# # This file is necessary to make this directory a package. __all__ = ['tracer', 'tracefilter'] pytracer-0.2.3/tracer/tracefilter.py000066400000000000000000000064711131503605200175070ustar00rootroot00000000000000# Copyright (C) 2008, 2009 Rocky Bernstein # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """ Some of the customized filtering desired in tracing to some simple routines. What test for inclusion based on the code for a frame or a function. """ import inspect def add_to_set(frame_or_fn, f_set): """Add `frame_or_fn' to the list of functions to include""" try: f_code = to_f_code(frame_or_fn) f_set.add(f_code) return True except: return False pass def fs2set(frames_or_fns): """Given a list of frame or function objects, turn it into a set which can be used in an include set. """ f_code_set = set() for f in frames_or_fns: add_to_set(f, f_code_set) pass return f_code_set def to_f_code(f): if hasattr(f, 'func_code'): return f.func_code else: t = inspect.getmembers(f, inspect.iscode) if len(t) > 0: return t[0][1] return None class TraceFilter(): """ A class that can be used to test whether certain frames or functions should be skipped/included in tracing. """ def __init__(self, include_fns = [], continue_return_frame = None): self.include_f_codes = fs2set(include_fns) return def is_included(self, frame_or_fn): """Return True if `frame_or_fn' is in the list of functions to include""" try: return to_f_code(frame_or_fn) in self.include_f_codes except: return False pass def clear_include(self): self.include_f_codes = set() return def add_include(self, frame_or_fn): """Remove `frame_or_fn' from the list of functions to include""" try: return add_to_set(frame_or_fn, self.include_f_codes) except: return False pass def remove_include(self, frame_or_fn): """Remove `frame_or_fn' from the list of functions to include""" try: self.include_f_codes.remove(to_f_code(frame_or_fn)) return True except: return False pass # Demo it if __name__ == '__main__': filter = TraceFilter([add_to_set]) curframe = inspect.currentframe() f_code = to_f_code(curframe) print "Created filter for 'add_to_set'" print filter.include_f_codes print "filter includes 'add_to_set'?", filter.is_included(add_to_set) print "Current frame includes 'add_to_set'?", filter.is_included(curframe) print "filter includes to_f_code?", filter.is_included(to_f_code) print "Removing filter for 'add_to_set'" filter.remove_include(add_to_set) print "filter includes 'add_to_set'?", filter.is_included(add_to_set) filter.clear_include() pass pytracer-0.2.3/tracer/tracer.py000066400000000000000000000321561131503605200164620ustar00rootroot00000000000000# -*- coding: utf-8 -*- # Copyright (C) 2008, 2009 Rocky Bernstein # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see . """Centralized Trace management around sys.settrace. We allow several sets of trace events to get registered and unregistered. We allow certain functions to be registered to be not traced. We allow tracing to be turned on and off temporarily without losing the trace functions. """ import operator, sys, inspect, threading, types # Python Cookbook Recipe 6.7. In Python 2.6 use collections.namedtuple def superTuple(typename, *attribute_names): " create and return a subclass of `tuple', with named attributes " # make the subclass with appropriate __new__ and __repr__ specials nargs = len(attribute_names) class supertup(tuple): __slots__ = () # save memory, we don't need a per-instance dict def __new__(cls, *args): if len(args) !=nargs: raise TypeError, '%s takes exactly %d arguments (%d given)' % ( typename, nargs, len(args)) return tuple.__new__(cls, args) def __repr__(self): return '%s(%s)' % (typename, ', '.join(map(repr, self))) # add a few key touches to our subclass of `tuple' for index, attr_name in enumerate(attribute_names): setattr(supertup, attr_name, property(operator.itemgetter(index))) supertup.__name__ = typename return supertup Trace_entry = superTuple('Trace_entry', 'trace_fn', 'event_set', 'ignore_frameid') HOOKS = [] # List of Bunch(trace_fn, event_set) # We run trace_fn if the event is in event_set. STARTED_STATE = False # True if we are tracing. # FIXME: in 2.6 we can use sys.gettrace ALL_EVENT_NAMES = ('c_call', 'c_exception', 'c_return', 'call', 'exception', 'line', 'return',) # If you want short strings for the above event names EVENT2SHORT = {'c_call' : 'C>', 'c_exception': 'C!', 'c_return' : 'C<', 'call' : '->', 'exception' : '!!', 'line' : '--', 'return' : '<-'} ALL_EVENTS = frozenset(ALL_EVENT_NAMES) TRACE_SUSPEND = False debug = False # Setting true def null_trace_hook(frame, event, arg): """ A trace hook that doesn't do anything. Can use this to "turn off" tracing by setting frame.f_trace. Setting sys.settrace(None) sometimes doesn't work... """ pass def check_event_set(event_set): " check `event_set' for validity. Raise TypeError if not valid " if event_set is not None and not event_set.issubset(ALL_EVENTS): raise TypeError, 'event set is neither None nor a subset of ALL_EVENTS' return def find_hook(trace_fn): """Find `trace_fn' in `hooks', and return the index of it. return None is not found.""" try: i = [entry.trace_fn for entry in HOOKS].index(trace_fn) except ValueError: return None return i def option_set(options, value, default_options): if not options: return default_options.get(value) elif value in options: return options[value] else: return default_options.get(value) # Not reached return None def _tracer_func(frame, event, arg): """The internal function set by sys.settrace which runs all of the user-registered trace hook functions.""" global TRACE_SUSPEND, HOOKS, debug if debug: print "%s -- %s:%d" % (event, frame.f_code.co_filename, frame.f_lineno) if TRACE_SUSPEND: return _tracer_func # Leave a breadcrumb for this routine so we can know by # frame inspection where the debugger ends. "info threads" # by default for example wants to also not show the trace_hook # call from pytracer. tracer_func_frame = inspect.currentframe() # Go over all registered hooks for i in range(len(HOOKS)): hook = HOOKS[i] if hook.ignore_frameid == id(frame): continue if hook.event_set is None or event in hook.event_set: if not hook.trace_fn(frame, event, arg): # sys.settrace's semantics provide that a if trace # hook returns None or False, it should turn off # tracing for that frame. HOOKS[i] = Trace_entry(hook.trace_fn, hook.event_set, id(frame)) pass pass # print "event_seen %s, keep_trace %s" % (event_triggered, keep_trace,) # From sys.settrace info: The local trace function # should return a reference to itself (or to another function # for further tracing in that scope), or None to turn off # tracing in that scope. return _tracer_func DEFAULT_ADD_HOOK_OPTS = { 'position': -1, # Which really means "back of list" 'start': False, 'event_set': ALL_EVENTS, 'backlevel': 0 } def add_hook(trace_fn, options=None): """Add `trace_fn' to the list of callback functions that get run when tracing is turned on. The number of hook functions registered is returned. A check is made on `trace_fn' to make sure it is a function which takes 3 parameters: a frame, an event, and an arg or which sometimes arg is None. `options' is a hash having potential keys: 'position', 'start', 'event_set', and 'backlevel'. If the event_set option-key is included, it should be is an event set that trace_fn will get run on. Use set() or frozenset() to create this set. ALL_EVENT_NAMES is a tuple contain a list of the event names. ALL_EVENTS is a frozenset of these. 'position' is the index of where the hook should be place in the list, so 0 is first and -1 *after* is last item; the default is the very back of the list (-1). -2 is *after* the next to last item. 'start' is a boolean which indicates the hooks should be started if they aren't already. 'backlevel' an integer indicates that the calling should continue backwards in return call frames and is the number of levels to skip ignore. 0 means that the caller of add_hook() is traced as well as all new frames the caller subsequently calls. 1 means that all the caller of add_hook() is ignored but prior parent frames are traced, and None means that no previous parent frames should be traced. """ # Parameter checking: if inspect.ismethod(trace_fn): argcount = 4 elif inspect.isfunction(trace_fn): argcount = 3 else: raise TypeError, ( "trace_fn should be something isfunction() or ismethod() blesses") try: if argcount != trace_fn.func_code.co_argcount: raise TypeError, ( 'trace fn should take exactly %d arguments (takes %d)' % ( argcount, trace_fn.func_code.co_argcount,)) except: raise TypeError get_option = lambda key: option_set(options, key, DEFAULT_ADD_HOOK_OPTS) event_set = get_option( 'event_set') check_event_set(event_set) # Setup so we don't trace into this routine. ignore_frame = inspect.currentframe() # Should we trace frames below the one that we issued this # call? backlevel = get_option('backlevel') if backlevel is not None: if types.IntType != type(backlevel): raise TypeError, ( 'backlevel should be an integer type, is %s' % ( backlevel)) frame = ignore_frame while frame and backlevel >= 0: backlevel -= 1 frame = frame.f_back pass # Set to trace all frames below this while frame: frame.f_trace = _tracer_func frame = frame.f_back pass pass # If the global tracer hook has been registered, the below will # trigger the hook to get called after the assignment. # That's why we set the hook for this frame to ignore tracing. entry = Trace_entry(trace_fn, event_set, ignore_frame) # based on position, figure out where to put the hook. position = get_option('position') if position == -1: HOOKS.append(entry) else: if position < -1: # Recall we need -1 for *after* the end so -2 is normally what is # called -1. position += 1 pass HOOKS[position:position] = [entry] pass if get_option('start'): start() return len(HOOKS) def clear_hooks(): ' clear all trace hooks ' global HOOKS HOOKS = [] return def clear_hooks_and_stop(): ' clear all trace hooks and stop tracing ' global STARTED_STATE if STARTED_STATE: stop() clear_hooks() return def size(): ' return the number of trace hooks installed, an integer. ' global HOOKS return len(HOOKS) def is_started(): """Return true if tracing has been started. Until we assume Python 2.6 or better, keeping track is done by internal tracking. Thus calls to sys.settrace outside of Tracer won't be detected :-( """ global STARTED_STATE return STARTED_STATE def remove_hook(trace_fn, stop_if_empty=False): """Remove `trace_fn' from list of callback functions run when tracing is turned on. If `trace_fn' is not in the list of callback functions, None is ruturned. On successful removal, the number of callback functions remaining is returned.""" global HOOKS i = find_hook(trace_fn) if i is not None: del HOOKS[i] if 0 == len(HOOKS) and stop_if_empty: stop() return 0 return len(HOOKS) return None DEFAULT_START_OPTS = { 'trace_fn': None, 'add_hook_opts': DEFAULT_ADD_HOOK_OPTS, 'include_threads': False } def start(options = None): """Start using all previously-registered trace hooks. If `trace_fn' is not None, we'll search for that and add it, if it's not already added.""" get_option = lambda key: option_set(options, key, DEFAULT_START_OPTS) trace_fn = get_option('trace_fn') if trace_fn is not None: add_hook(trace_fn, get_option('add_hook_opts')) pass if get_option('include_threads'): threading.settrace(_tracer_func) pass # FIXME: in 2.6, there is the possibility for chaining # existing hooks by using sys.gettrace(). if sys.settrace(_tracer_func) is None: global STARTED_STATE, HOOKS STARTED_STATE = True return len(HOOKS) if trace_fn is not None: remove_hook(trace_fn) raise NotImplementedError, "sys.settrace() doesn't seem to be implemented" def stop(): """Stop all trace hooks""" if sys.settrace(None) is None: global HOOKS, STARTED_STATE STARTED_STATE = False return len(HOOKS) raise NotImplementedError, "sys.settrace() doesn't seem to be implemented" # Demo it if __name__ == '__main__': t = EVENT2SHORT.keys(); t.sort() print "EVENT2SHORT.keys() == ALL_EVENT_NAMES: ", tuple(t) == ALL_EVENT_NAMES trace_count = 10 import tracefilter ignore_filter = tracefilter.TraceFilter([find_hook, stop, remove_hook]) def my_trace_dispatch(frame, event, arg): global trace_count, ignore_filter 'A sample trace function' if ignore_filter.is_included(frame): return None lineno = frame.f_lineno filename = frame.f_code.co_filename print "%s - %s:%d" % (event, filename, lineno), if 'call' == event: print (', %s()' % frame.f_code.co_name), if arg: print "arg", arg else: print pass # print "event: %s frame %s arg %s\n" % [event, frame, arg] if trace_count > 0: trace_count -= 1 return my_trace_dispatch else: print "Max trace count reached - turning off tracing" return None pass def foo(): print "foo" print "** Tracing started before start(): %s" % is_started() start() # tracer.start() outside of this file print "** Tracing started after start(): %s" % is_started() add_hook(my_trace_dispatch) # tracer.add_hook(...) outside eval("1+2") stop() y = 5 start() foo() z = 5 for i in range(6): print i trace_count = 25 remove_hook(my_trace_dispatch, stop_if_empty=True) print "** Tracing started: %s" % is_started() print "** Tracing only 'call' now..." add_hook(my_trace_dispatch, {'start': True, 'event_set': frozenset(('call',))}) foo() stop() exit(0)