Mercurial > cpython-lru_cache-weakref

annotate Tools/scripts/objgraph.py @ 74006:88198b93ff2f

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Issue #13560: Add PyUnicode_EncodeLocale() * Use PyUnicode_EncodeLocale() in time.strftime() if wcsftime() is not available * Document my last changes in Misc/NEWS
author Victor Stinner <victor.stinner@haypocalc.com>
date Sat, 17 Dec 2011 04:13:41 +0100
parents fcfe324663a6
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #! /usr/bin/env python3
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2
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3 # objgraph
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4 #
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5 # Read "nm -o" input (on IRIX: "nm -Bo") of a set of libraries or modules
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6 # and print various interesting listings, such as:
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7 #
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8 # - which names are used but not defined in the set (and used where),
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9 # - which names are defined in the set (and where),
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10 # - which modules use which other modules,
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11 # - which modules are used by which other modules.
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12 #
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13 # Usage: objgraph [-cdu] [file] ...
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14 # -c: print callers per objectfile
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15 # -d: print callees per objectfile
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16 # -u: print usage of undefined symbols
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17 # If none of -cdu is specified, all are assumed.
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18 # Use "nm -o" to generate the input (on IRIX: "nm -Bo"),
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19 # e.g.: nm -o /lib/libc.a | objgraph
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20
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21
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22 import sys
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23 import os
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24 import getopt
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25 import re
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26
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27 # Types of symbols.
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28 #
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29 definitions = 'TRGDSBAEC'
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30 externals = 'UV'
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31 ignore = 'Nntrgdsbavuc'
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32
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33 # Regular expression to parse "nm -o" output.
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34 #
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35 matcher = re.compile('(.*):\t?........ (.) (.*)$')
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36
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37 # Store "item" in "dict" under "key".
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38 # The dictionary maps keys to lists of items.
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39 # If there is no list for the key yet, it is created.
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40 #
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41 def store(dict, key, item):
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42 if key in dict:
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43 dict[key].append(item)
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44 else:
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45 dict[key] = [item]
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46
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47 # Return a flattened version of a list of strings: the concatenation
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48 # of its elements with intervening spaces.
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49 #
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50 def flat(list):
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51 s = ''
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52 for item in list:
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53 s = s + ' ' + item
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54 return s[1:]
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55
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56 # Global variables mapping defined/undefined names to files and back.
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57 #
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58 file2undef = {}
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59 def2file = {}
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60 file2def = {}
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61 undef2file = {}
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62
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63 # Read one input file and merge the data into the tables.
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64 # Argument is an open file.
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65 #
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66 def readinput(fp):
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67 while 1:
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68 s = fp.readline()
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69 if not s:
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70 break
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71 # If you get any output from this line,
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72 # it is probably caused by an unexpected input line:
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73 if matcher.search(s) < 0: s; continue # Shouldn't happen
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74 (ra, rb), (r1a, r1b), (r2a, r2b), (r3a, r3b) = matcher.regs[:4]
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75 fn, name, type = s[r1a:r1b], s[r3a:r3b], s[r2a:r2b]
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76 if type in definitions:
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77 store(def2file, name, fn)
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78 store(file2def, fn, name)
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79 elif type in externals:
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80 store(file2undef, fn, name)
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81 store(undef2file, name, fn)
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82 elif not type in ignore:
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83 print(fn + ':' + name + ': unknown type ' + type)
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84
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85 # Print all names that were undefined in some module and where they are
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86 # defined.
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87 #
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88 def printcallee():
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89 flist = sorted(file2undef.keys())
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90 for filename in flist:
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91 print(filename + ':')
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92 elist = file2undef[filename]
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93 elist.sort()
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94 for ext in elist:
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95 if len(ext) >= 8:
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96 tabs = '\t'
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97 else:
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98 tabs = '\t\t'
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99 if ext not in def2file:
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100 print('\t' + ext + tabs + ' *undefined')
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101 else:
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102 print('\t' + ext + tabs + flat(def2file[ext]))
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103
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104 # Print for each module the names of the other modules that use it.
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105 #
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106 def printcaller():
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107 files = sorted(file2def.keys())
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108 for filename in files:
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109 callers = []
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110 for label in file2def[filename]:
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111 if label in undef2file:
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112 callers = callers + undef2file[label]
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113 if callers:
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114 callers.sort()
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115 print(filename + ':')
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116 lastfn = ''
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117 for fn in callers:
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118 if fn != lastfn:
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119 print('\t' + fn)
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120 lastfn = fn
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121 else:
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122 print(filename + ': unused')
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123
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124 # Print undefined names and where they are used.
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125 #
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126 def printundef():
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127 undefs = {}
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128 for filename in list(file2undef.keys()):
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129 for ext in file2undef[filename]:
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130 if ext not in def2file:
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131 store(undefs, ext, filename)
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132 elist = sorted(undefs.keys())
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133 for ext in elist:
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134 print(ext + ':')
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135 flist = sorted(undefs[ext])
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136 for filename in flist:
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137 print('\t' + filename)
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138
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139 # Print warning messages about names defined in more than one file.
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140 #
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141 def warndups():
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142 savestdout = sys.stdout
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143 sys.stdout = sys.stderr
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144 names = sorted(def2file.keys())
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145 for name in names:
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146 if len(def2file[name]) > 1:
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147 print('warning:', name, 'multiply defined:', end=' ')
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148 print(flat(def2file[name]))
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149 sys.stdout = savestdout
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150
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151 # Main program
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152 #
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153 def main():
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154 try:
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155 optlist, args = getopt.getopt(sys.argv[1:], 'cdu')
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156 except getopt.error:
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157 sys.stdout = sys.stderr
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158 print('Usage:', os.path.basename(sys.argv[0]), end=' ')
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159 print('[-cdu] [file] ...')
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160 print('-c: print callers per objectfile')
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161 print('-d: print callees per objectfile')
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162 print('-u: print usage of undefined symbols')
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163 print('If none of -cdu is specified, all are assumed.')
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164 print('Use "nm -o" to generate the input (on IRIX: "nm -Bo"),')
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165 print('e.g.: nm -o /lib/libc.a | objgraph')
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166 return 1
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167 optu = optc = optd = 0
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168 for opt, void in optlist:
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169 if opt == '-u':
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170 optu = 1
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171 elif opt == '-c':
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172 optc = 1
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173 elif opt == '-d':
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174 optd = 1
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175 if optu == optc == optd == 0:
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176 optu = optc = optd = 1
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177 if not args:
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178 args = ['-']
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179 for filename in args:
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180 if filename == '-':
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181 readinput(sys.stdin)
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182 else:
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183 readinput(open(filename, 'r'))
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184 #
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185 warndups()
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186 #
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187 more = (optu + optc + optd > 1)
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188 if optd:
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189 if more:
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190 print('---------------All callees------------------')
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191 printcallee()
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192 if optu:
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193 if more:
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194 print('---------------Undefined callees------------')
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195 printundef()
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196 if optc:
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197 if more:
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198 print('---------------All Callers------------------')
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199 printcaller()
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200 return 0
274
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201
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202 # Call the main program.
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203 # Use its return value as exit status.
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204 # Catch interrupts to avoid stack trace.
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205 #
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206 if __name__ == '__main__':
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207 try:
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208 sys.exit(main())
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209 except KeyboardInterrupt:
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210 sys.exit(1)