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#!/usr/bin/env python
"""
pycallgraph
http://pycallgraph.slowchop.com/
Copyright Gerald Kaszuba 2007
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 2 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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
# slight modifications for Cobbler testing
# Michael DeHaan <mdehaan@redhat.com>, 2007
"""
import inspect
import sys
import os
import tempfile
# statistical data
def reset_trace():
global call_dict
call_dict = {}
global call_stack
call_stack = ['__main__']
global func_count
func_count = {}
global func_count_max
func_count_max = 0
reset_trace()
# graphviz settings
graph_attributes = {
'graph': {
},
'node': {
'color': '.5 0 .9',
'style': 'filled',
'shape': 'rect',
'fontname': 'Helvetica',
'fontsize': 10,
},
}
# settings for building dot files
settings = {
'node_attributes': {
'label': r'%(func)s\ncalls: %(hits)i',
'color': '%(col)s',
},
'node_color': lambda calls, : '%f %f %f' % (calls / 2 + .5, calls, 0.9),
'edge_color': lambda calls, : '%f %f %f' % (calls / 2 + .5, calls, 0.7),
'exclude_module': [
'yaml', 'yaml.load', 'yaml.stream', 'sre', 'unittest',
'sys', 'os', 'subprocess', 'string', 'time', 'test', 'posixpath', 'random',
'shutil', 'pycallgraph', 'stat', 'tempfile', 'socket', 'glob', 'sub_process',
'errno', 'weakref', 'traceback'
],
'exclude_class': [],
'exclude_func': [],
'exclude_specific': ['stop_trace', 'make_graph'],
'include_module': [],
'include_class': [],
'include_func': [],
'include_specific': [],
'dont_exclude_anything': False,
}
class PyCallGraphException(Exception):
pass
def start_trace(reset=True):
if reset:
reset_trace()
sys.settrace(tracer)
def stop_trace():
sys.settrace(None)
def tracer(frame, event, arg):
global func_count_max
if event == 'call':
dont_keep = False
code = frame.f_code
# work out the module
module = inspect.getmodule(code)
if module:
module_name = module.__name__
if module_name == '__main__':
module_name = ''
else:
if settings['include_module']:
if module_name not in settings['include_module']:
dont_keep = True
else:
# if module_name in settings['exclude_module']:
# dont_keep = True
for x in settings['exclude_module']:
if module_name.startswith(x):
dont_keep = True
module_name += '.'
else:
module_name = 'unknown.'
dont_keep = True
# work out the instance, if we're in a class
try:
class_name = frame.f_locals['self'].__class__.__name__
if settings['include_class']:
if class_name not in settings['include_class']:
dont_keep = True
else:
if class_name in settings['exclude_class']:
dont_keep = True
class_name += '.'
except (KeyError, AttributeError):
class_name = ''
# work out the current function or method
func_name = code.co_name
if func_name == '?':
func_name = '__main__'
else:
if settings['include_func']:
if func_name not in settings['include_func']:
dont_keep = True
else:
if func_name in settings['exclude_func']:
dont_keep = True
# join em together in a readable form
full_name = '%s%s%s' % (module_name, class_name, func_name)
if full_name in settings['exclude_specific']:
dont_keep = True
# throw it all in dictonaires
fr = call_stack[-1]
if not dont_keep or settings['dont_exclude_anything']:
if fr not in call_dict:
call_dict[fr] = {}
if full_name not in call_dict[fr]:
call_dict[fr][full_name] = 0
call_dict[fr][full_name] += 1
if full_name not in func_count:
func_count[full_name] = 0
func_count[full_name] += 1
if func_count[full_name] > func_count_max:
func_count_max = func_count[full_name]
call_stack.append(full_name)
else:
call_stack.append('')
if event == 'return':
if call_stack:
call_stack.pop(-1)
def get_dot(stop=True):
if stop:
stop_trace()
ret = ['digraph G {',]
for comp, comp_attr in graph_attributes.items():
ret.append('%s [' % comp)
for attr, val in comp_attr.items():
ret.append('%(attr)s = "%(val)s",' % locals())
ret.append('];')
for func, hits in func_count.items():
frac = float(hits) / func_count_max
col = settings['node_color'](frac)
attribs = ['%s="%s"' % a for a in settings['node_attributes'].items()]
node_str = '"%s" [%s];' % (func, ','.join(attribs))
ret.append(node_str % locals())
for fr_key, fr_val in call_dict.items():
if fr_key == '':
continue
for to_key, to_val in fr_val.items():
frac = float(to_val) / func_count_max
col = settings['edge_color'](frac)
edge = '[ color = "%s" ]' % col
ret.append('"%s"->"%s" %s' % (fr_key, to_key, edge))
ret.append('}')
return '\n'.join(ret)
def save_dot(filename):
open(filename, 'w').write(get_dot())
def make_graph(filename, format='png', tool='dot', stop=True):
if stop:
stop_trace()
fd, tempname = tempfile.mkstemp()
f = os.fdopen(fd, 'w')
f.write(get_dot())
f.close()
cmd = '%(tool)s -T%(format)s -o%(filename)s %(tempname)s' % locals()
ret = os.system(cmd)
os.unlink(tempname)
if ret:
raise PyCallGraphException('The command "%(cmd)s" failed with error' \
'code %(ret)i.' % locals())
if __name__ == '__main__':
f = 'test.png'
print 'Starting trace'
start_trace()
import re
re.compile('h(e)l[A-Z]lo.*th[^e]*e(r)e')
print 'Generating graph'
stop_trace()
make_graph(f)
print '%s should be in this directiory. Hit enter to quit.' % f
raw_input()
__version__ = "$Revision: $"
# vim:set shiftwidth=4 tabstop=4 expandtab textwidth=79:
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