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htmlfiles	[ DIR ]	drwxr-xr-x
__init__.py	1.25 KB	-rw-r--r--
__main__.py	257 B	-rw-r--r--
annotate.py	3.67 KB	-rw-r--r--
bytecode.py	713 B	-rw-r--r--
cmdline.py	33.62 KB	-rw-r--r--
collector.py	20.08 KB	-rw-r--r--
config.py	21.47 KB	-rw-r--r--
context.py	2.42 KB	-rw-r--r--
control.py	50.49 KB	-rw-r--r--
data.py	7.33 KB	-rw-r--r--
debug.py	17.39 KB	-rw-r--r--
disposition.py	1.87 KB	-rw-r--r--
env.py	5.94 KB	-rw-r--r--
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jsonreport.py	4.64 KB	-rw-r--r--
lcovreport.py	4.82 KB	-rw-r--r--
misc.py	11.89 KB	-rw-r--r--
multiproc.py	3.76 KB	-rw-r--r--
numbits.py	4.56 KB	-rw-r--r--
parser.py	55.39 KB	-rw-r--r--
phystokens.py	7.62 KB	-rw-r--r--
plugin.py	19.07 KB	-rw-r--r--
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py.typed	72 B	-rw-r--r--
python.py	7.88 KB	-rw-r--r--
pytracer.py	14.08 KB	-rw-r--r--
report.py	10.37 KB	-rw-r--r--
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tomlconfig.py	7.39 KB	-rw-r--r--
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types.py	5.4 KB	-rw-r--r--
version.py	1.4 KB	-rw-r--r--
xmlreport.py	9.57 KB	-rw-r--r--

Code Editor : multiproc.py

# Licensed under the Apache License: http://www.apache.org/licenses/LICENSE-2.0
# For details: https://github.com/nedbat/coveragepy/blob/master/NOTICE.txt

"""Monkey-patching to add multiprocessing support for coverage.py"""

import multiprocessing
import multiprocessing.process
import os
import os.path
import sys
import traceback

from typing import Any, Dict

# An attribute that will be set on the module to indicate that it has been
# monkey-patched.
PATCHED_MARKER = "_coverage$patched"

OriginalProcess = multiprocessing.process.BaseProcess
original_bootstrap = OriginalProcess._bootstrap     # type: ignore[attr-defined]

class ProcessWithCoverage(OriginalProcess):         # pylint: disable=abstract-method
    """A replacement for multiprocess.Process that starts coverage."""

def _bootstrap(self, *args, **kwargs):          # type: ignore[no-untyped-def]
        """Wrapper around _bootstrap to start coverage."""
        try:
            from coverage import Coverage       # avoid circular import
            cov = Coverage(data_suffix=True, auto_data=True)
            cov._warn_preimported_source = False
            cov.start()
            debug = cov._debug
            assert debug is not None
            if debug.should("multiproc"):
                debug.write("Calling multiprocessing bootstrap")
        except Exception:
            print("Exception during multiprocessing bootstrap init:")
            traceback.print_exc(file=sys.stdout)
            sys.stdout.flush()
            raise
        try:
            return original_bootstrap(self, *args, **kwargs)
        finally:
            if debug.should("multiproc"):
                debug.write("Finished multiprocessing bootstrap")
            cov.stop()
            cov.save()
            if debug.should("multiproc"):
                debug.write("Saved multiprocessing data")

class Stowaway:
    """An object to pickle, so when it is unpickled, it can apply the monkey-patch."""
    def __init__(self, rcfile: str) -> None:
        self.rcfile = rcfile

def __getstate__(self) -> Dict[str, str]:
        return {"rcfile": self.rcfile}

def __setstate__(self, state: Dict[str, str]) -> None:
        patch_multiprocessing(state["rcfile"])

def patch_multiprocessing(rcfile: str) -> None:
    """Monkey-patch the multiprocessing module.

This enables coverage measurement of processes started by multiprocessing.
    This involves aggressive monkey-patching.

`rcfile` is the path to the rcfile being used.

"""

if hasattr(multiprocessing, PATCHED_MARKER):
        return

OriginalProcess._bootstrap = ProcessWithCoverage._bootstrap     # type: ignore[attr-defined]

# Set the value in ProcessWithCoverage that will be pickled into the child
    # process.
    os.environ["COVERAGE_RCFILE"] = os.path.abspath(rcfile)

# When spawning processes rather than forking them, we have no state in the
    # new process.  We sneak in there with a Stowaway: we stuff one of our own
    # objects into the data that gets pickled and sent to the sub-process. When
    # the Stowaway is unpickled, it's __setstate__ method is called, which
    # re-applies the monkey-patch.
    # Windows only spawns, so this is needed to keep Windows working.
    try:
        from multiprocessing import spawn
        original_get_preparation_data = spawn.get_preparation_data
    except (ImportError, AttributeError):
        pass
    else:
        def get_preparation_data_with_stowaway(name: str) -> Dict[str, Any]:
            """Get the original preparation data, and also insert our stowaway."""
            d = original_get_preparation_data(name)
            d["stowaway"] = Stowaway(rcfile)
            return d

spawn.get_preparation_data = get_preparation_data_with_stowaway

setattr(multiprocessing, PATCHED_MARKER, True)

${this.title}

Code Editor : multiproc.py