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PATH: opt / cloudlinux / venv / lib / python3.11 / site-packages / coverage

# 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)

[-] tracer.cpython-311-x86_64-linux-gnu.so [open]
[-] control.py [open]
[+] ..
[-] version.py [open]
[-] inorout.py [open]
[-] env.py [open]
[+] __pycache__
[-] numbits.py [open]
[-] parser.py [open]
[-] misc.py [open]
[-] collector.py [open]
[-] plugin.py [open]
[-] html.py [open]
[-] cmdline.py [open]
[-] phystokens.py [open]
[-] __main__.py [open]
[-] annotate.py [open]
[-] jsonreport.py [open]
[-] types.py [open]
[-] config.py [open]
[-] files.py [open]
[-] debug.py [open]
[-] results.py [open]
[-] pytracer.py [open]
[-] templite.py [open]
[-] plugin_support.py [open]
[-] tomlconfig.py [open]
[-] execfile.py [open]
[-] xmlreport.py [open]
[-] report.py [open]
[-] __init__.py [open]
[-] bytecode.py [open]
[-] disposition.py [open]
[+] htmlfiles
[-] sqldata.py [open]
[-] context.py [open]
[-] python.py [open]
[-] data.py [open]
[-] report_core.py [open]
[-] exceptions.py [open]
[-] lcovreport.py [open]
[+] fullcoverage
[-] multiproc.py [open]
[-] py.typed [open]