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annotate tests/testlib/sigpipe-remote.py @ 47617:d5fc1b59a2df

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sigpipe-remote: verify the script is IO are unbuffered We don't want to get stuck anywhere by buffers. Differential Revision: https://phab.mercurial-scm.org/D11086
author Pierre-Yves David <pierre-yves.david@octobus.net>
date Mon, 12 Jul 2021 03:29:21 +0200
parents df6148ca7120
children 27ff81547d35
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python3
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2 from __future__ import print_function
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3
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4 import io
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5 import os
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6 import subprocess
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7 import sys
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8 import threading
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9 import time
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10
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11 # we cannot use mercurial.testing as long as python2 is not dropped as the test will only install the mercurial module for python2 in python2 run
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13 if isinstance(sys.stdout.buffer, io.BufferedWriter):
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14 print('SIGPIPE-HELPER: script need unbuffered output', file=sys.stderr)
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15 sys.exit(255)
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16
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17 DEBUG_FILE = os.environ.get('SIGPIPE_REMOTE_DEBUG_FILE')
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18 if DEBUG_FILE is None:
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19 debug_stream = sys.stderr.buffer
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20 else:
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21 debug_stream = open(DEBUG_FILE, 'bw', buffering=0)
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22
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23 SYNCFILE1 = os.environ.get('SYNCFILE1')
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24 SYNCFILE2 = os.environ.get('SYNCFILE2')
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25 if SYNCFILE1 is None:
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26 print('SIGPIPE-HELPER: missing variable $SYNCFILE1', file=sys.stderr)
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27 sys.exit(255)
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28 if SYNCFILE2 is None:
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29 print('SIGPIPE-HELPER: missing variable $SYNCFILE2', file=sys.stderr)
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30 sys.exit(255)
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31
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33 def _timeout_factor():
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34 """return the current modification to timeout"""
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35 default = int(os.environ.get('HGTEST_TIMEOUT_DEFAULT', 360))
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36 current = int(os.environ.get('HGTEST_TIMEOUT', default))
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37 if current == 0:
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38 return 1
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39 return current / float(default)
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42 def wait_file(path, timeout=10):
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43 timeout *= _timeout_factor()
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44 start = time.time()
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45 while not os.path.exists(path):
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46 if (time.time() - start) > timeout:
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47 raise RuntimeError(b"timed out waiting for file: %s" % path)
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48 time.sleep(0.01)
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51 def write_file(path, content=b''):
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52 with open(path, 'wb') as f:
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53 f.write(content)
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55
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56 # end of mercurial.testing content
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57
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58 if sys.version_info[0] < 3:
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59 print('SIGPIPE-HELPER: script should run with Python 3', file=sys.stderr)
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60 sys.exit(255)
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62
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63 def sysbytes(s):
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64 return s.encode('utf-8')
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65
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66
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67 def sysstr(s):
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68 return s.decode('latin-1')
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69
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71 piped_stdout = os.pipe2(os.O_NONBLOCK | os.O_CLOEXEC)
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72 piped_stderr = os.pipe2(os.O_NONBLOCK | os.O_CLOEXEC)
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73
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74 stdout_writer = os.fdopen(piped_stdout[1], "rb")
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75 stdout_reader = os.fdopen(piped_stdout[0], "rb")
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76 stderr_writer = os.fdopen(piped_stderr[1], "rb")
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77 stderr_reader = os.fdopen(piped_stderr[0], "rb")
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78
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79 debug_stream.write(b'SIGPIPE-HELPER: Starting\n')
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80
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81 TESTLIB_DIR = os.path.dirname(sys.argv[0])
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82 WAIT_SCRIPT = os.path.join(TESTLIB_DIR, 'wait-on-file')
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83
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84 hooks_cmd = '%s 10 %s %s'
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85 hooks_cmd %= (
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86 WAIT_SCRIPT,
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87 SYNCFILE2,
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88 SYNCFILE1,
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89 )
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90
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91 cmd = ['hg']
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92 cmd += sys.argv[1:]
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93 sub = subprocess.Popen(
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94 cmd,
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95 bufsize=0,
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96 close_fds=True,
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97 stdin=sys.stdin,
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98 stdout=stdout_writer,
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99 stderr=stderr_writer,
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100 )
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102 debug_stream.write(b'SIGPIPE-HELPER: Mercurial started\n')
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103
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105 shut_down = threading.Event()
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107 close_lock = threading.Lock()
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109
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
110 def _read(stream):
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
111 try:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
112 return stream.read()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
113 except ValueError:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
114 # read on closed file
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
115 return None
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
116
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
117
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
118 def forward_stdout():
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
119 while not shut_down.is_set():
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
120 c = _read(stdout_reader)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
121 while c is not None:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
122 sys.stdout.buffer.write(c)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
123 c = _read(stdout_reader)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
124 time.sleep(0.001)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
125 with close_lock:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
126 if not stdout_reader.closed:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
127 stdout_reader.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
128 debug_stream.write(b'SIGPIPE-HELPER: stdout closed\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
129
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
130
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
131 def forward_stderr():
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
132 while not shut_down.is_set():
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
133 c = _read(stderr_reader)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
134 if c is not None:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
135 sys.stderr.buffer.write(c)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
136 c = _read(stderr_reader)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
137 time.sleep(0.001)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
138 with close_lock:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
139 if not stderr_reader.closed:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
140 stderr_reader.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
141 debug_stream.write(b'SIGPIPE-HELPER: stderr closed\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
142
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
143
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
144 stdout_thread = threading.Thread(target=forward_stdout, daemon=True)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
145 stderr_thread = threading.Thread(target=forward_stderr, daemon=True)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
146
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
147 try:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
148 stdout_thread.start()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
149 stderr_thread.start()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
150
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
151 debug_stream.write(b'SIGPIPE-HELPER: Redirection in place\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
152
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
153 try:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
154 wait_file(sysbytes(SYNCFILE1))
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
155 except RuntimeError as exc:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
156 msg = sysbytes(str(exc))
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
157 debug_stream.write(b'SIGPIPE-HELPER: wait failed: %s\n' % msg)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
158 else:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
159 debug_stream.write(b'SIGPIPE-HELPER: SYNCFILE1 detected\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
160 with close_lock:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
161 if not stdout_reader.closed:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
162 stdout_reader.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
163 if not stderr_reader.closed:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
164 stderr_reader.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
165 sys.stdin.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
166 debug_stream.write(b'SIGPIPE-HELPER: pipes closed\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
167 debug_stream.write(b'SIGPIPE-HELPER: creating SYNCFILE2\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
168 write_file(sysbytes(SYNCFILE2))
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
169 finally:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
170 debug_stream.write(b'SIGPIPE-HELPER: Shutting down\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
171 shut_down.set()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
172 if not sys.stdin.closed:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
173 sys.stdin.close()
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
174 try:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
175 sub.wait(timeout=30)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
176 except subprocess.TimeoutExpired:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
177 msg = b'SIGPIPE-HELPER: Server process failed to terminate\n'
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
178 debug_stream.write(msg)
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
179 else:
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
180 debug_stream.write(b'SIGPIPE-HELPER: Server process terminated\n')
ed81f2be5527 test: use a python script in `test-transaction-rollback-on-sigpipe.t`
Pierre-Yves David <pierre-yves.david@octobus.net>
parents:
diff changeset
181 debug_stream.write(b'SIGPIPE-HELPER: Shut down\n')