annotate unix.py @ 125:10aa5a0e46bd

Fixed an exception raised instead of forceful process termination on Win32
author Oleg Oshmyan <chortos@inbox.lv>
date Sun, 15 May 2011 00:33:32 +0100
parents 19c42a3cd962
children fcdcd0c95552
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1 # Copyright (c) 2010-2011 Chortos-2 <chortos@inbox.lv>
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2
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3 from __future__ import division, with_statement
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4
91
c62c9bfd614a Removed import_error
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5 from compat import *
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6 import testcases # mutual import
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7
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8 from subprocess import Popen
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8cd7a732f2f3 Fixed a crash in the unix module
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9 import os, sys, time
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10
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11 try:
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741ae3391b61 Moved clock/time detection into platform-specific modules and testcases
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12 from testcases import clock
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13 except ImportError:
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14 if sys.platform.startswith('java'):
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15 from time import clock
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16 else:
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17 from time import time as clock
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18
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19 try:
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20 from signal import SIGTERM, SIGKILL
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21 except ImportError:
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22 SIGTERM = 15
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23 SIGKILL = 9
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24
85
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25 __all__ = 'call', 'kill', 'terminate', 'pause', 'clock'
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26
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27
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28 if not sys.stdin.isatty():
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29 pause = lambda: sys.stdin.read(1)
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30 catch_escape = False
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31 else:
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32 try:
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33 from select import select
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34 import termios, tty, atexit
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35 except ImportError:
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36 pause = None
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37 catch_escape = False
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38 else:
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39 catch_escape = True
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40 def cleanup(old=termios.tcgetattr(sys.stdin.fileno())):
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41 termios.tcsetattr(sys.stdin.fileno(), termios.TCSAFLUSH, old)
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42 atexit.register(cleanup)
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43 tty.setcbreak(sys.stdin.fileno())
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44 def pause():
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45 sys.stdin.read(1)
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46
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47 try:
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48 from signal import SIGCHLD, SIG_DFL, signal, set_wakeup_fd
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49 from select import select, error as SelectError
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50 from errno import EAGAIN, EINTR
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51 from fcntl import fcntl, F_SETFD, F_GETFD, F_SETFL, F_GETFL
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52 from os import O_NONBLOCK
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53 try:
124
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54 from signal import siginterrupt
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55 except ImportError:
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56 # Sucks.
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57 siginterrupt = lambda signalnum, flag: None
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58 try:
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59 import cPickle as pickle
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60 except ImportError:
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61 import pickle
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62 except ImportError:
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63 def call(*args, **kwargs):
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64 case = kwargs.pop('case')
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65 try:
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66 case.process = Popen(*args, **kwargs)
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67 except OSError:
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68 raise testcases.CannotStartTestee(sys.exc_info()[1])
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69 case.time_started = clock()
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70 if not case.maxwalltime:
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71 while True:
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72 exitcode, now = case.process.poll(), clock()
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73 if exitcode is not None:
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74 case.time_stopped = now
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75 break
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76 else:
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77 time.sleep(.001)
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78 else:
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79 time_end = case.time_started + case.maxwalltime
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80 while True:
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81 exitcode, now = case.process.poll(), clock()
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82 if exitcode is not None:
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83 case.time_stopped = now
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84 break
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85 elif now >= time_end:
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86 raise TimeLimitExceeded
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87 else:
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88 time.sleep(.001)
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89 else:
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90 try:
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91 from fcntl import FD_CLOEXEC
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92 except ImportError:
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93 FD_CLOEXEC = 1
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94
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95 try:
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96 from resource import getrusage, RUSAGE_SELF, RUSAGE_CHILDREN
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97 except ImportError:
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98 from time import clock as cpuclock
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99 getrusage = lambda who: None
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100 else:
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101 def cpuclock():
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102 rusage = getrusage(RUSAGE_SELF)
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103 return rusage.ru_utime + rusage.ru_stime
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104
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105 try:
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106 from resource import setrlimit
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107 try:
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108 from resource import RLIMIT_AS
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109 except ImportError:
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110 from resource import RLIMIT_VMEM
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111 except ImportError:
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112 setrlimit = None
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113
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114 # Make SIGCHLD interrupt sleep() and select()
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115 sigchld_pipe_read, sigchld_pipe_write = os.pipe()
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116 fcntl(sigchld_pipe_read, F_SETFL,
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117 fcntl(sigchld_pipe_read, F_GETFL) | O_NONBLOCK)
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118 fcntl(sigchld_pipe_write, F_SETFL,
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119 fcntl(sigchld_pipe_write, F_GETFL) | O_NONBLOCK)
82
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120 def bury_child(signum, frame):
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121 try:
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122 bury_child.case.time_stopped = clock()
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123 except Exception:
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124 pass
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125 signal(SIGCHLD, bury_child)
118
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126 set_wakeup_fd(sigchld_pipe_write)
108
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127 class SignalIgnorer(object):
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128 def __enter__(self):
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129 signal(SIGCHLD, SIG_DFL)
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130 def __exit__(self, exc_type, exc_value, traceback):
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131 signal(SIGCHLD, bury_child)
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132 signal_ignorer = SignalIgnorer()
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133 __all__ += 'signal_ignorer',
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134
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135 # If you want this to work portably, don't set any stdio argument to PIPE
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136 def call(*args, **kwargs):
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137 global last_rusage
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138 bury_child.case = case = kwargs.pop('case')
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139 read, write = os.pipe()
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140 fcntl(write, F_SETFD, fcntl(write, F_GETFD) | FD_CLOEXEC)
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diff changeset
141 def preexec_fn():
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diff changeset
142 os.close(read)
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diff changeset
143 if setrlimit and case.maxmemory:
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diff changeset
144 maxmemory = ceil(case.maxmemory * 1048576)
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145 setrlimit(RLIMIT_AS, (maxmemory, maxmemory))
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diff changeset
146 # I would also set a CPU time limit but I do not want the time
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147 # passing between the calls to fork and exec to be counted in
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148 os.write(write, pickle.dumps((clock(), cpuclock()), 1))
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diff changeset
149 kwargs['preexec_fn'] = preexec_fn
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diff changeset
150 old_rusage = getrusage(RUSAGE_CHILDREN)
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diff changeset
151 last_rusage = None
118
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diff changeset
152 while True:
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diff changeset
153 try:
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diff changeset
154 os.read(sigchld_pipe_read, 512)
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diff changeset
155 except OSError:
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diff changeset
156 if sys.exc_info()[1].errno == EAGAIN:
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diff changeset
157 break
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diff changeset
158 else:
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diff changeset
159 raise
124
19c42a3cd962 Very fast testees no longer break Popen on some UNIX systems on Python 2.6+
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diff changeset
160 siginterrupt(SIGCHLD, False)
82
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161 try:
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162 case.process = Popen(*args, **kwargs)
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163 except OSError:
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164 os.close(read)
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165 raise testcases.CannotStartTestee(sys.exc_info()[1])
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166 finally:
124
19c42a3cd962 Very fast testees no longer break Popen on some UNIX systems on Python 2.6+
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diff changeset
167 siginterrupt(SIGCHLD, True)
82
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168 os.close(write)
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169 try:
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170 if not catch_escape:
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171 if case.maxwalltime:
118
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diff changeset
172 try:
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173 select((sigchld_pipe_read,), (), (), case.maxwalltime)
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diff changeset
174 except SelectError:
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175 if sys.exc_info()[1].args[0] != EINTR:
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diff changeset
176 raise
82
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177 if case.process.poll() is None:
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178 raise testcases.WallTimeLimitExceeded
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179 else:
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180 case.process.wait()
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181 else:
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182 if not case.maxwalltime:
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183 try:
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184 while case.process.poll() is None:
118
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diff changeset
185 s = select((sys.stdin, sigchld_pipe_read), (), ())
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diff changeset
186 if (sigchld_pipe_read not in s[0] and
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
187 sys.stdin.read(1) == '\33'):
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diff changeset
188 raise testcases.CanceledByUser
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diff changeset
189 except (SelectError, IOError):
82
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190 if sys.exc_info()[1].args[0] != EINTR:
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diff changeset
191 raise
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diff changeset
192 else:
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diff changeset
193 case.process.poll()
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diff changeset
194 else:
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195 time_end = clock() + case.maxwalltime
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196 try:
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197 while case.process.poll() is None:
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198 remaining = time_end - clock()
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199 if remaining > 0:
118
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
200 s = select((sys.stdin, sigchld_pipe_read),
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
201 (), (), remaining)
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
202 if (sigchld_pipe_read not in s[0] and
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
203 sys.stdin.read(1) == '\33'):
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diff changeset
204 raise testcases.CanceledByUser
82
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diff changeset
205 else:
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diff changeset
206 raise testcases.WallTimeLimitExceeded
118
16fe21d6582e Fixed a few race conditions in unix.call triggered by very fast testees
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diff changeset
207 except (SelectError, IOError):
82
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diff changeset
208 if sys.exc_info()[1].args[0] != EINTR:
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parents:
diff changeset
209 raise
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diff changeset
210 else:
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diff changeset
211 case.process.poll()
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diff changeset
212 finally:
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diff changeset
213 case.time_started, cpustart = pickle.loads(os.read(read, 512))
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parents:
diff changeset
214 os.close(read)
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diff changeset
215 del bury_child.case
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diff changeset
216 new_rusage = getrusage(RUSAGE_CHILDREN)
119
0b265fe9c81f Wall-clock time limit is now enforced on the output wall-clock time
Oleg Oshmyan <chortos@inbox.lv>
parents: 118
diff changeset
217 if (case.maxwalltime and
0b265fe9c81f Wall-clock time limit is now enforced on the output wall-clock time
Oleg Oshmyan <chortos@inbox.lv>
parents: 118
diff changeset
218 case.time_stopped - case.time_started > case.maxwalltime):
0b265fe9c81f Wall-clock time limit is now enforced on the output wall-clock time
Oleg Oshmyan <chortos@inbox.lv>
parents: 118
diff changeset
219 raise testcases.WallTimeLimitExceeded
123
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
220 if new_rusage:
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
221 time_started = old_rusage.ru_utime + old_rusage.ru_stime + cpustart
90c002c960cb Fixed CPU time display on UNIX
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parents: 119
diff changeset
222 time_stopped = new_rusage.ru_utime + new_rusage.ru_stime
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
223 if case.maxcputime or not case.maxwalltime:
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
224 case.time_started = time_started
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
225 case.time_stopped = time_stopped
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
226 case.time_limit_string = case.cpu_time_limit_string
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
227 if (case.maxcputime and
90c002c960cb Fixed CPU time display on UNIX
Oleg Oshmyan <chortos@inbox.lv>
parents: 119
diff changeset
228 time_stopped - time_started > case.maxcputime):
90c002c960cb Fixed CPU time display on UNIX
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parents: 119
diff changeset
229 raise testcases.CPUTimeLimitExceeded
82
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parents:
diff changeset
230 if case.maxmemory:
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diff changeset
231 if sys.platform != 'darwin':
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diff changeset
232 maxrss = case.maxmemory * 1024
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diff changeset
233 else:
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diff changeset
234 maxrss = case.maxmemory * 1048576
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parents:
diff changeset
235 if last_rusage and last_rusage.ru_maxrss > maxrss:
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parents:
diff changeset
236 raise testcases.MemoryLimitExceeded
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parents:
diff changeset
237 elif (new_rusage and
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parents:
diff changeset
238 new_rusage.ru_maxrss > old_rusage.ru_maxrss and
06356af50bf9 Finished testcases reorganization and CPU time limit implementation
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parents:
diff changeset
239 new_rusage.ru_maxrss > maxrss):
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parents:
diff changeset
240 raise testcases.MemoryLimitExceeded
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parents:
diff changeset
241
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diff changeset
242 # Emulate memory limits on platforms compatible with 4.3BSD but not XSI
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parents:
diff changeset
243 # I say 'emulate' because the OS will allow excessive memory usage
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diff changeset
244 # anyway; Upreckon will just treat the test case as not passed.
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diff changeset
245 # To do this, we not only require os.wait4 to be present but also
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parents:
diff changeset
246 # assume things about the implementation of subprocess.Popen.
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parents:
diff changeset
247 try:
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diff changeset
248 def waitpid_emu(pid, options, _wait4=os.wait4):
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parents:
diff changeset
249 global last_rusage
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diff changeset
250 pid, status, last_rusage = _wait4(pid, options)
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parents:
diff changeset
251 return pid, status
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diff changeset
252 _waitpid = os.waitpid
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diff changeset
253 os.waitpid = waitpid_emu
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parents:
diff changeset
254 try:
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parents:
diff changeset
255 defaults = Popen._internal_poll.__func__.__defaults__
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diff changeset
256 except AttributeError:
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parents:
diff changeset
257 # Python 2.5
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diff changeset
258 defaults = Popen._internal_poll.im_func.func_defaults
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parents:
diff changeset
259 i = defaults.index(_waitpid)
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parents:
diff changeset
260 defaults = defaults[:i] + (waitpid_emu,) + defaults[i+1:]
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parents:
diff changeset
261 try:
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diff changeset
262 Popen._internal_poll.__func__.__defaults__ = defaults
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parents:
diff changeset
263 except AttributeError:
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parents:
diff changeset
264 # Python 2.5 again
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parents:
diff changeset
265 Popen._internal_poll.im_func.func_defaults = defaults
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parents:
diff changeset
266 except (AttributeError, ValueError):
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parents:
diff changeset
267 pass
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diff changeset
268
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diff changeset
269
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diff changeset
270 def kill(process):
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diff changeset
271 try:
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diff changeset
272 process.kill()
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diff changeset
273 except AttributeError:
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diff changeset
274 os.kill(process.pid, SIGKILL)
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diff changeset
275
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diff changeset
276
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diff changeset
277 def terminate(process):
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diff changeset
278 try:
06356af50bf9 Finished testcases reorganization and CPU time limit implementation
Oleg Oshmyan <chortos@inbox.lv>
parents:
diff changeset
279 process.terminate()
06356af50bf9 Finished testcases reorganization and CPU time limit implementation
Oleg Oshmyan <chortos@inbox.lv>
parents:
diff changeset
280 except AttributeError:
06356af50bf9 Finished testcases reorganization and CPU time limit implementation
Oleg Oshmyan <chortos@inbox.lv>
parents:
diff changeset
281 os.kill(process.pid, SIGTERM)