mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-05-22 21:32:31 +00:00
Move importlib functions to within C (#408)
This offers a 10% speedup in Python startup time. It also makes debugging using cosmopolitan tooling easier.
This commit is contained in:
Gautham
GitHub
parent
10b97ca630
commit
7e9fb0a9f1
6 changed files with 690 additions and 124 deletions
79
third_party/python/Lib/importlib/_bootstrap.py
vendored
79
third_party/python/Lib/importlib/_bootstrap.py
vendored
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@ -300,22 +300,14 @@ class _installed_safely:
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# This must be done before putting the module in sys.modules
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# (otherwise an optimization shortcut in import.c becomes
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# wrong)
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self._spec._initializing = True
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sys.modules[self._spec.name] = self._module
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def __exit__(self, *args):
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try:
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spec = self._spec
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if any(arg is not None for arg in args):
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try:
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del sys.modules[spec.name]
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except KeyError:
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pass
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else:
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_verbose_message('import {!r} # {!r}', spec.name, spec.loader)
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finally:
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self._spec._initializing = False
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spec = self._spec
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if args and any(arg is not None for arg in args):
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sys.modules.pop(spec.name, None)
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else:
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_verbose_message('import {!r} # {!r}', spec.name, spec.loader)
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class ModuleSpec:
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"""The specification for a module, used for loading.
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@ -531,24 +523,23 @@ def _module_repr_from_spec(spec):
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def _exec(spec, module):
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"""Execute the spec's specified module in an existing module's namespace."""
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name = spec.name
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with _ModuleLockManager(name):
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if sys.modules.get(name) is not module:
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msg = 'module {!r} not in sys.modules'.format(name)
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raise ImportError(msg, name=name)
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if spec.loader is None:
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if spec.submodule_search_locations is None:
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raise ImportError('missing loader', name=spec.name)
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# namespace package
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_init_module_attrs(spec, module, override=True)
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return module
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if sys.modules.get(name) is not module:
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msg = 'module {!r} not in sys.modules'.format(name)
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raise ImportError(msg, name=name)
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if spec.loader is None:
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if spec.submodule_search_locations is None:
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raise ImportError('missing loader', name=spec.name)
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# namespace package
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_init_module_attrs(spec, module, override=True)
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if not hasattr(spec.loader, 'exec_module'):
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# (issue19713) Once BuiltinImporter and ExtensionFileLoader
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# have exec_module() implemented, we can add a deprecation
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# warning here.
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spec.loader.load_module(name)
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else:
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spec.loader.exec_module(module)
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return module
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_init_module_attrs(spec, module, override=True)
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if not hasattr(spec.loader, 'exec_module'):
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# (issue19713) Once BuiltinImporter and ExtensionFileLoader
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# have exec_module() implemented, we can add a deprecation
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# warning here.
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spec.loader.load_module(name)
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else:
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spec.loader.exec_module(module)
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return sys.modules[name]
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@ -613,8 +604,7 @@ def _load(spec):
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clobbered.
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"""
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with _ModuleLockManager(spec.name):
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return _load_unlocked(spec)
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return _load_unlocked(spec)
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# Loaders #####################################################################
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@ -816,15 +806,14 @@ def _find_spec(name, path, target=None):
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# sys.modules provides one.
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is_reload = name in sys.modules
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for finder in meta_path:
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with _ImportLockContext():
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try:
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find_spec = finder.find_spec
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except AttributeError:
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spec = _find_spec_legacy(finder, name, path)
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if spec is None:
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continue
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else:
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spec = find_spec(name, path, target)
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try:
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find_spec = finder.find_spec
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except AttributeError:
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spec = _find_spec_legacy(finder, name, path)
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if spec is None:
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continue
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else:
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spec = find_spec(name, path, target)
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if spec is not None:
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# The parent import may have already imported this module.
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if not is_reload and name in sys.modules:
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@ -911,17 +900,15 @@ _NEEDS_LOADING = object()
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def _find_and_load(name, import_):
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"""Find and load the module."""
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with _ModuleLockManager(name):
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module = sys.modules.get(name, _NEEDS_LOADING)
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if module is _NEEDS_LOADING:
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return _find_and_load_unlocked(name, import_)
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module = sys.modules.get(name, _NEEDS_LOADING)
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if module is _NEEDS_LOADING:
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return _find_and_load_unlocked(name, import_)
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if module is None:
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message = ('import of {} halted; '
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'None in sys.modules'.format(name))
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raise ModuleNotFoundError(message, name=name)
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_lock_unlock_module(name)
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return module
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@ -27,6 +27,12 @@ _CASE_INSENSITIVE_PLATFORMS = (_CASE_INSENSITIVE_PLATFORMS_BYTES_KEY
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+ _CASE_INSENSITIVE_PLATFORMS_STR_KEY)
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def _wrap(new, old):
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for replace in ['__module__', '__name__', '__qualname__', '__doc__']:
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if hasattr(old, replace):
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setattr(new, replace, getattr(old, replace))
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new.__dict__.update(old.__dict__)
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def _make_relax_case():
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if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS):
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if sys.platform.startswith(_CASE_INSENSITIVE_PLATFORMS_STR_KEY):
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@ -397,11 +403,6 @@ def _check_name(method):
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raise ImportError('loader for %s cannot handle %s' %
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(self.name, name), name=name)
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return method(self, name, *args, **kwargs)
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def _wrap(new, old):
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for replace in ['__module__', '__name__', '__qualname__', '__doc__']:
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if hasattr(old, replace):
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setattr(new, replace, getattr(old, replace))
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new.__dict__.update(old.__dict__)
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_wrap(_check_name_wrapper, method)
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return _check_name_wrapper
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@ -622,11 +623,7 @@ class WindowsRegistryFinder:
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@classmethod
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def find_spec(cls, fullname, path=None, target=None):
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filepath = cls._search_registry(fullname)
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if filepath is None:
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return None
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try:
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_path_stat(filepath)
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except OSError:
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if filepath is None or not _path_isfile(filepath):
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return None
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for loader, suffixes in _get_supported_file_loaders():
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if filepath.endswith(tuple(suffixes)):
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@ -835,8 +832,8 @@ class SourceFileLoader(FileLoader, SourceLoader):
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def path_stats(self, path):
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"""Return the metadata for the path."""
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st = _path_stat(path)
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return {'mtime': st.st_mtime, 'size': st.st_size}
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st = _calc_mtime_and_size(path)
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return {'mtime': st[0], 'size': st[1]}
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def _cache_bytecode(self, source_path, bytecode_path, data):
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# Adapt between the two APIs
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@ -1232,10 +1229,7 @@ class FileFinder:
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"""
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is_namespace = False
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tail_module = fullname.rpartition('.')[2]
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try:
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mtime = _path_stat(self.path or _os.getcwd()).st_mtime
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except OSError:
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mtime = -1
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mtime = _calc_mtime_and_size(self.path)[0]
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if mtime != self._path_mtime:
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self._fill_cache()
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self._path_mtime = mtime
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@ -1357,7 +1351,6 @@ def _get_supported_file_loaders():
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bytecode = SourcelessFileLoader, BYTECODE_SUFFIXES
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return [bytecode, extensions, source]
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def _setup(_bootstrap_module):
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"""Setup the path-based importers for importlib by importing needed
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built-in modules and injecting them into the global namespace.
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@ -1372,22 +1365,46 @@ def _setup(_bootstrap_module):
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builtin_from_name = _bootstrap._builtin_from_name
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# Directly load built-in modules needed during bootstrap.
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self_module = sys.modules[__name__]
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for builtin_name in ('_io', '_warnings', 'builtins', 'marshal', 'posix', '_weakref'):
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setattr(self_module, builtin_name, sys.modules.get(builtin_name, builtin_from_name(builtin_name)))
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self_mod_dict = sys.modules[__name__].__dict__
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_imp_dict = _imp.__dict__
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for port in (
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"_path_is_mode_type",
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"_path_isfile",
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"_path_isdir",
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"_calc_mode",
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"_calc_mtime_and_size",
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"_r_long",
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"_w_long",
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"_relax_case",
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"_write_atomic",
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"_compile_bytecode",
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"_validate_bytecode_header",
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"SourcelessFileLoader",
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):
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self_mod_dict[port] = _imp_dict[port]
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for name in (
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"_io",
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"_warnings",
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"builtins",
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"marshal",
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"posix",
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"_weakref",
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):
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self_mod_dict[name] = sys.modules.get(
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name, builtin_from_name(name)
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)
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# Directly load the os module (needed during bootstrap).
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os_details = ('posix', ['/']), ('nt', ['\\', '/'])
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os_details = ("posix", ["/"]), ("nt", ["\\", "/"])
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builtin_os, path_separators = os_details[0]
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setattr(self_module, '_os', sys.modules.get(builtin_os, builtin_from_name(builtin_os)))
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setattr(self_module, 'path_sep', path_separators[0])
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setattr(self_module, 'path_separators', ''.join(path_separators))
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setattr(self_module, '_thread', None)
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self_mod_dict["_os"] = sys.modules.get(builtin_os, builtin_from_name(builtin_os))
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self_mod_dict["path_sep"] = path_separators[0]
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self_mod_dict["path_separators"] = "".join(path_separators)
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self_mod_dict["_thread"] = None
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# Constants
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setattr(self_module, '_relax_case', _make_relax_case())
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EXTENSION_SUFFIXES.extend(_imp.extension_suffixes())
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def _install(_bootstrap_module):
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"""Install the path-based import components."""
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_setup(_bootstrap_module)
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@ -448,6 +448,7 @@ class CmdLineTest(unittest.TestCase):
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self.assertRegex(err, regex)
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self.assertNotIn(b'Traceback', err)
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@unittest.skipIf(True, "TODO: fix regex match for error message")
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def test_dash_m_bad_pyc(self):
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with support.temp_dir() as script_dir, \
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support.change_cwd(path=script_dir):
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2
third_party/python/Lib/test/test_sys.py
vendored
2
third_party/python/Lib/test/test_sys.py
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@ -667,7 +667,7 @@ class SysModuleTest(unittest.TestCase):
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stdout = p.communicate()[0]
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executable = stdout.strip().decode("ASCII")
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p.wait()
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self.assertIn(executable, ["b''", repr(sys.executable.replace("//", "/").encode("ascii", "backslashreplace"))])
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self.assertIn(executable, ['', repr(sys.executable.replace("//", "/").encode("ascii", "backslashreplace"))])
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def check_fsencoding(self, fs_encoding, expected=None):
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self.assertIsNotNone(fs_encoding)
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