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#!/usr/bin/env python
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"""
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This tool re-uses the class Struct and GprofParser in gprof2dot.py
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https://github.com/jrfonseca/gprof2dot.git
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"""
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from __future__ import division
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import sys
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import math
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import re
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import optparse
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from collections import deque
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# Python 2.x/3.x compatibility
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if sys.version_info[0] >= 3:
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PYTHON_3 = True
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def compat_iteritems(x): return x.items() # No iteritems() in Python 3
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def compat_itervalues(x): return x.values() # No itervalues() in Python 3
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def compat_keys(x): return list(x.keys()) # keys() is a generator in Python 3
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basestring = str # No class basestring in Python 3
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unichr = chr # No unichr in Python 3
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xrange = range # No xrange in Python 3
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else:
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PYTHON_3 = False
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def compat_iteritems(x): return x.iteritems()
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def compat_itervalues(x): return x.itervalues()
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def compat_keys(x): return x.keys()
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class Struct:
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"""Masquerade a dictionary with a structure-like behavior."""
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def __init__(self, attrs = None):
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if attrs is None:
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attrs = {}
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self.__dict__['_attrs'] = attrs
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def __getattr__(self, name):
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try:
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return self._attrs[name]
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except KeyError:
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raise AttributeError(name)
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def __setattr__(self, name, value):
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self._attrs[name] = value
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def __str__(self):
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return str(self._attrs)
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def __repr__(self):
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return repr(self._attrs)
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class GprofParser():
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"""Parser for GNU gprof output.
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See also:
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- Chapter "Interpreting gprof's Output" from the GNU gprof manual
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http://sourceware.org/binutils/docs-2.18/gprof/Call-Graph.html#Call-Graph
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- File "cg_print.c" from the GNU gprof source code
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http://sourceware.org/cgi-bin/cvsweb.cgi/~checkout~/src/gprof/cg_print.c?rev=1.12&cvsroot=src
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"""
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def __init__(self, fp, show_name):
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#Parser.__init__(self)
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self.fp = fp
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self.functions = {}
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self.cycles = {}
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self.threshold = None
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self.show_name = show_name
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def readline(self):
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line = self.fp.readline()
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if not line:
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sys.stderr.write('error: unexpected end of file\n')
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sys.exit(1)
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line = line.rstrip('\r\n')
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return line
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_int_re = re.compile(r'^\d+$')
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_float_re = re.compile(r'^\d+\.\d+$')
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def translate(self, mo):
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"""Extract a structure from a match object, while translating the types in the process."""
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attrs = {}
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# Return a dictionary containing all the named subgroups of the match, keyed by the subgroup name.
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groupdict = mo.groupdict()
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for name, value in compat_iteritems(groupdict):
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if value is None:
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value = None
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elif self._int_re.match(value):
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value = int(value)
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elif self._float_re.match(value):
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value = float(value)
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attrs[name] = (value)
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return Struct(attrs)
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_cg_header_re = re.compile(
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# original gprof header
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r'^\s+called/total\s+parents\s*$|' +
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r'^index\s+%time\s+self\s+descendents\s+called\+self\s+name\s+index\s*$|' +
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r'^\s+called/total\s+children\s*$|' +
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# GNU gprof header
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r'^index\s+%\s+time\s+self\s+children\s+called\s+name\s*$'
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)
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_cg_ignore_re = re.compile(
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# spontaneous
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r'^\s+<spontaneous>\s*$|'
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# internal calls (such as "mcount")
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r'^.*\((\d+)\)$'
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)
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_cg_primary_re = re.compile(
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r'^\[(?P<index>\d+)\]?' +
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r'\s+(?P<percentage_time>\d+\.\d+)' +
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r'\s+(?P<self>\d+\.\d+)' +
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r'\s+(?P<descendants>\d+\.\d+)' +
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r'\s+(?:(?P<called>\d+)(?:\+(?P<called_self>\d+))?)?' +
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r'\s+(?P<name>\S.*?)' +
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r'(?:\s+<cycle\s(?P<cycle>\d+)>)?' +
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r'\s\[(\d+)\]$'
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)
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_cg_parent_re = re.compile(
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r'^\s+(?P<self>\d+\.\d+)?' +
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r'\s+(?P<descendants>\d+\.\d+)?' +
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r'\s+(?P<called>\d+)(?:/(?P<called_total>\d+))?' +
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r'\s+(?P<name>\S.*?)' +
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r'(?:\s+<cycle\s(?P<cycle>\d+)>)?' +
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r'\s\[(?P<index>\d+)\]$'
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)
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_cg_child_re = _cg_parent_re
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_cg_cycle_header_re = re.compile(
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r'^\[(?P<index>\d+)\]?' +
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r'\s+(?P<percentage_time>\d+\.\d+)' +
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r'\s+(?P<self>\d+\.\d+)' +
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r'\s+(?P<descendants>\d+\.\d+)' +
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r'\s+(?:(?P<called>\d+)(?:\+(?P<called_self>\d+))?)?' +
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r'\s+<cycle\s(?P<cycle>\d+)\sas\sa\swhole>' +
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r'\s\[(\d+)\]$'
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)
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_cg_cycle_member_re = re.compile(
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r'^\s+(?P<self>\d+\.\d+)?' +
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r'\s+(?P<descendants>\d+\.\d+)?' +
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r'\s+(?P<called>\d+)(?:\+(?P<called_self>\d+))?' +
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r'\s+(?P<name>\S.*?)' +
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r'(?:\s+<cycle\s(?P<cycle>\d+)>)?' +
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r'\s\[(?P<index>\d+)\]$'
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)
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_cg_sep_re = re.compile(r'^--+$')
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def parse_function_entry(self, lines):
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parents = []
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children = []
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while True:
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if not lines:
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sys.stderr.write('warning: unexpected end of entry\n')
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line = lines.pop(0)
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# only the primary line starts with '['
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if line.startswith('['):
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break
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# read function parent line
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mo = self._cg_parent_re.match(line)
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if not mo:
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# ignore lines "<spontaneous> ..."
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if self._cg_ignore_re.match(line):
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continue
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sys.stderr.write('warning: unrecognized call graph entry: %r\n' % line)
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else:
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parent = self.translate(mo)
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# parents save all the entries, each entry contains params "self call" etc.
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parents.append(parent)
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# read primary line
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# note that it is already popped from lines
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mo = self._cg_primary_re.match(line)
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if not mo:
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sys.stderr.write('warning: unrecognized call graph entry: %r\n' % line)
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return
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else:
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function = self.translate(mo)
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while lines:
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line = lines.pop(0)
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# read function subroutine line
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mo = self._cg_child_re.match(line)
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if not mo:
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if self._cg_ignore_re.match(line):
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continue
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sys.stderr.write('warning: unrecognized call graph entry: %r\n' % line)
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else:
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child = self.translate(mo)
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children.append(child)
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function.parents = parents
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function.children = children
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self.functions[function.index] = function
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def parse_cycle_entry(self, lines):
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# read cycle header line
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line = lines[0]
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mo = self._cg_cycle_header_re.match(line)
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if not mo:
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sys.stderr.write('warning: unrecognized call graph entry: %r\n' % line)
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return
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# the Struct
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# in callgraph:
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# [18] 25.6 30.70 1.62 2063230471+1000861014 <cycle 2 as a whole> [18]
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# {'index': 18, 'descendants': 1.62, 'self': 30.7, 'percentage_time': 25.6, 'cycle': 2, 'called': 2063230471, 'called_self': 1000861014}
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cycle = self.translate(mo)
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# read cycle member lines
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# append all functions in cycle entry
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cycle.functions = []
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# append all children
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for line in lines[1:]:
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mo = self._cg_cycle_member_re.match(line)
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if not mo:
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sys.stderr.write('warning: unrecognized call graph entry: %r\n' % line)
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continue
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call = self.translate(mo)
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cycle.functions.append(call)
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# cycle.cycle is the cycle number
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self.cycles[cycle.cycle] = cycle
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def parse_cg_entry(self, lines):
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if lines[0].startswith("["):
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# example in callgraph: [18] 25.6 30.70 1.62 2063230471+1000861014 <cycle 2 as a whole> [18]
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self.parse_cycle_entry(lines)
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else:
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self.parse_function_entry(lines)
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def parse_cg(self):
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"""Parse the call graph."""
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# skip call graph header
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# ignore the starting lines that is not graph header
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while not self._cg_header_re.match(self.readline()):
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pass
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line = self.readline()
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while self._cg_header_re.match(line):
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line = self.readline()
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# process call graph entries
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entry_lines = []
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while line != '\014': # form feed
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if line and not line.isspace():
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if self._cg_sep_re.match(line):
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# entry_lines saves the lines for last entry
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# we process it here
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self.parse_cg_entry(entry_lines)
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# reset entry_lines
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entry_lines = []
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else:
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# append normal lines, if we have an sep_re
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# we can process it in the above code
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entry_lines.append(line)
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line = self.readline()
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def isChild(self, parent, func):
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for item in self.functions[parent].children:
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if item.index == func:
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return True
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return False
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def isParentOfNfdModule(self, func):
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nextFunc = [func]
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while (len(nextFunc) != 0):
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index = nextFunc.pop()
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if not index in self.functions:
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return False
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if "nfd" in self.functions[index].name:
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return True
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for childFunc in self.functions[index].children:
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if not childFunc.index in self.functions:
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continue
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child = self.functions[childFunc.index]
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# break the cycle (A->B->C-A), but loss some details
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if child.cycle == None and child.called_self == None:
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nextFunc.append(child.index)
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return False
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def expandFunctionsWithInclusiveTime(self):
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# function entry example:
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#(1387, {'index': 1387, 'name': '__tcf_0', 'descendants': 0.0, 'self': 0.0, 'percentage_time': 0.0, 'children': [], 'parents': [{'called_total': 1, 'index': 1180, 'name': 'nfd::rib::RibStatusPublisher::RibStatusPublisher(nfd::rib::Rib const&, ndn::Face&, ndn::Name const&, ndn::security::KeyChain&)', 'descendants': 0.0, 'self': 0.0, 'called': 1, 'cycle': None}], 'cycle': None, 'called': 1, 'called_self': None})
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sortedIndex = sorted(self.functions)
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# use list as stack
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toBeVisited = []
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# ignore the nfd::NfdRunner::run() and nfd::NfdRunner::run()::{lambda()#1}::operator()() const for now
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# because they split the percentage time boost::asio::detail::task_io_service::run(boost::system::error_code&)
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# tranverse the graph without cycles
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# tuple members: (index, called, depth, list for which level contains a "|")
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toBeVisited.append((sortedIndex[0], self.functions[sortedIndex[0]].called, 0, []))
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# use a queue to save the nodes orderly, since we can save the index to add "|"
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visitOrder = deque()
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#called_self = []
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while (len(toBeVisited) != 0):
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tmp = toBeVisited.pop()
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(curFuncIndex, called, depth, sep_list) = tmp
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# if the index is not in the function dict, ignore
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if not curFuncIndex in self.functions.keys():
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continue
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curFunc = self.functions[curFuncIndex]
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if curFunc.name.startswith("_GLOBAL__sub_I__ZN3"):
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continue
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percentage_time = curFunc.percentage_time * (called/curFunc.called)
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# ignore function and its children whose percentage_time is smaller than threshold
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if self.threshold != None and percentage_time < self.threshold:
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continue
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# every time, before add an item, update the previous items till the same level
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for item in reversed(visitOrder):
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if item[2] <= depth:
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break
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if not depth in item[3]:
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# item[3] is the index that needs a '|'
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item[3].append(depth)
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visitOrder.append(tmp)
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children = sorted(curFunc.children, key = lambda x: x.index, reverse=True)
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for childFunc in children:
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if not childFunc.index in self.functions:
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continue
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# do not add self calls
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if self.functions[childFunc.index].called_self != None:
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#if not childFunc.index in called_self:
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# called_self.append(childFunc.index)
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continue
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# assuming that function name without "nfd" will not call nfd functions except that its child function contains it
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if not "nfd" in childFunc.name and not self.isParentOfNfdModule(childFunc.index):
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continue
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else:
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propagated_calls = childFunc.called * (called/curFunc.called)
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toBeVisited.append((childFunc.index, propagated_calls, depth + 1, []))
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#print "\ncalled_self:", called_self
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#for item in called_self:
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# print self.functions[item].percentage_time, self.functions[item].name, "[%s]"%item
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#print "\n"
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print "\nThe tree below lists functions, it does not go deeper when it touches a cycle\n"
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print "Note that each entry contains 3 components 'percentage_time', 'function_name', 'fucntion index in the original gprof file'\n\n"
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while (len(visitOrder) != 0):
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(index, calls, depth, sep_list) = visitOrder.popleft()
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if not index in self.functions.keys():
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continue
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curFunc = self.functions[index]
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# visitOrder should contains all functions(except the self-called function) in the call graph
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lvlStr = list()
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if depth > 0:
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# indent for better layout
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for i in range((depth - 1)*2): lvlStr.append(" ")
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# add "|" into the indentation so that users can locate the parent function
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for i in sep_list:
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lvlStr[(i - 1)*2] = '|'
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funcStr = ""
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percentage_time = curFunc.percentage_time * (calls/curFunc.called)
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if depth > 0:
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lvlStr.append("|-")
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nextOne = -1
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if len(visitOrder) > 0:
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(nextOne, a, b, c) = visitOrder[0]
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if nextOne != -1 and self.isChild(index, nextOne):
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funcStr = "".join(lvlStr) + "+ "
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else:
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funcStr = "".join(lvlStr) + "- "
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if self.show_name:
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funcStr = funcStr + "%.2f"%percentage_time + "\t" + curFunc.name + "\t[%s]"%curFunc.index
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else:
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funcStr = funcStr + "%.2f"%percentage_time + "\t[%s]"%curFunc.index
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if curFunc.cycle != None:
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funcStr = funcStr + " <cycle %s>"%curFunc.cycle
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funcStr.strip()
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print funcStr
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def setThreshold(self, threshold):
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self.threshold = threshold
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def parse(self):
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self.parse_cg()
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self.fp.close()
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self.expandFunctionsWithInclusiveTime()
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#print self.functions[165], "\n"
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def main():
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"""Main program."""
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optparser = optparse.OptionParser(
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usage="\n\t%prog [options]")
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optparser.add_option(
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'-f', '--input', metavar='FILE',
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type="string", dest="input",
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help="input filename [stdin]")
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optparser.add_option(
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'-i', '--ignore', metavar='percentage_time',
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type="float", dest="threshold",
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help="ignore functions whose percentage time is below the threshold")
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optparser.add_option(
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"-n", action="store_false", dest="show_name",
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default=True, help="disable function name")
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(options, args) = optparser.parse_args(sys.argv[1:])
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fp = ""
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if options.input is None:
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fp = sys.stdin
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else:
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fp = open(options.input)
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parser = GprofParser(fp, options.show_name)
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if not options.threshold is None:
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parser.setThreshold(options.threshold)
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parser.parse()
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if __name__ == '__main__':
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main()
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