Mercurial Repositories > eric / file comparison
comparison: eric6/DebugClients/Python/coverage/multiproc.py
eric6/DebugClients/Python/coverage/multiproc.py
- changeset 7427
- 362cd1b6f81a
- parent 7275
- 9a25fe1fab84
- child 7702
- f8b97639deb5
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| 7426:dc171b1d8261 | 7427:362cd1b6f81a |
|---|---|
| 1 # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 | 1 # Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0 |
| 2 # For details: https://bitbucket.org/ned/coveragepy/src/default/NOTICE.txt | 2 # For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt |
| 3 | 3 |
| 4 """Monkey-patching to add multiprocessing support for coverage.py""" | 4 """Monkey-patching to add multiprocessing support for coverage.py""" |
| 5 | 5 |
| 6 import multiprocessing | 6 import multiprocessing |
| 7 import multiprocessing.process | 7 import multiprocessing.process |
| 8 import os | 8 import os |
| 9 import os.path | |
| 9 import sys | 10 import sys |
| 11 import traceback | |
| 10 | 12 |
| 13 from coverage import env | |
| 11 from coverage.misc import contract | 14 from coverage.misc import contract |
| 12 | 15 |
| 13 # An attribute that will be set on the module to indicate that it has been | 16 # An attribute that will be set on the module to indicate that it has been |
| 14 # monkey-patched. | 17 # monkey-patched. |
| 15 PATCHED_MARKER = "_coverage$patched" | 18 PATCHED_MARKER = "_coverage$patched" |
| 16 | 19 |
| 17 # The environment variable that specifies the rcfile for subprocesses. | |
| 18 COVERAGE_RCFILE_ENV = "_COVERAGE_RCFILE" | |
| 19 | 20 |
| 20 | 21 if env.PYVERSION >= (3, 4): |
| 21 if sys.version_info >= (3, 4): | |
| 22 OriginalProcess = multiprocessing.process.BaseProcess | 22 OriginalProcess = multiprocessing.process.BaseProcess |
| 23 else: | 23 else: |
| 24 OriginalProcess = multiprocessing.Process | 24 OriginalProcess = multiprocessing.Process |
| 25 | 25 |
| 26 original_bootstrap = OriginalProcess._bootstrap | 26 original_bootstrap = OriginalProcess._bootstrap |
| 27 | 27 |
| 28 class ProcessWithCoverage(OriginalProcess): | 28 class ProcessWithCoverage(OriginalProcess): # pylint: disable=abstract-method |
| 29 """A replacement for multiprocess.Process that starts coverage.""" | 29 """A replacement for multiprocess.Process that starts coverage.""" |
| 30 | 30 |
| 31 def _bootstrap(self, *args, **kwargs): # pylint: disable=arguments-differ | 31 def _bootstrap(self, *args, **kwargs): # pylint: disable=arguments-differ |
| 32 """Wrapper around _bootstrap to start coverage.""" | 32 """Wrapper around _bootstrap to start coverage.""" |
| 33 from coverage import Coverage # avoid circular import | |
| 34 rcfile = os.environ[COVERAGE_RCFILE_ENV] | |
| 35 cov = Coverage(data_suffix=True, config_file=rcfile) | |
| 36 cov.start() | |
| 37 debug = cov.debug | |
| 38 try: | 33 try: |
| 34 from coverage import Coverage # avoid circular import | |
| 35 cov = Coverage(data_suffix=True) | |
| 36 cov._warn_preimported_source = False | |
| 37 cov.start() | |
| 38 debug = cov._debug | |
| 39 if debug.should("multiproc"): | 39 if debug.should("multiproc"): |
| 40 debug.write("Calling multiprocessing bootstrap") | 40 debug.write("Calling multiprocessing bootstrap") |
| 41 except Exception: | |
| 42 print("Exception during multiprocessing bootstrap init:") | |
| 43 traceback.print_exc(file=sys.stdout) | |
| 44 sys.stdout.flush() | |
| 45 raise | |
| 46 try: | |
| 41 return original_bootstrap(self, *args, **kwargs) | 47 return original_bootstrap(self, *args, **kwargs) |
| 42 finally: | 48 finally: |
| 43 if debug.should("multiproc"): | 49 if debug.should("multiproc"): |
| 44 debug.write("Finished multiprocessing bootstrap") | 50 debug.write("Finished multiprocessing bootstrap") |
| 45 cov.stop() | 51 cov.stop() |
| 71 """ | 77 """ |
| 72 | 78 |
| 73 if hasattr(multiprocessing, PATCHED_MARKER): | 79 if hasattr(multiprocessing, PATCHED_MARKER): |
| 74 return | 80 return |
| 75 | 81 |
| 76 if sys.version_info >= (3, 4): | 82 if env.PYVERSION >= (3, 4): |
| 77 OriginalProcess._bootstrap = ProcessWithCoverage._bootstrap | 83 OriginalProcess._bootstrap = ProcessWithCoverage._bootstrap |
| 78 else: | 84 else: |
| 79 multiprocessing.Process = ProcessWithCoverage | 85 multiprocessing.Process = ProcessWithCoverage |
| 80 | 86 |
| 81 # Set the value in ProcessWithCoverage that will be pickled into the child | 87 # Set the value in ProcessWithCoverage that will be pickled into the child |
| 82 # process. | 88 # process. |
| 83 os.environ[COVERAGE_RCFILE_ENV] = rcfile | 89 os.environ["COVERAGE_RCFILE"] = os.path.abspath(rcfile) |
| 84 | 90 |
| 85 # When spawning processes rather than forking them, we have no state in the | 91 # When spawning processes rather than forking them, we have no state in the |
| 86 # new process. We sneak in there with a Stowaway: we stuff one of our own | 92 # new process. We sneak in there with a Stowaway: we stuff one of our own |
| 87 # objects into the data that gets pickled and sent to the sub-process. When | 93 # objects into the data that gets pickled and sent to the sub-process. When |
| 88 # the Stowaway is unpickled, it's __setstate__ method is called, which | 94 # the Stowaway is unpickled, it's __setstate__ method is called, which |
