074fa57506
Currently custom modules (the array set on PyImport_FrozenModules) replace all the frozen stdlib modules. That can be problematic and is unlikely to be what the user wants. This change treats the custom frozen modules as additions instead. They take precedence over all other frozen modules except for those needed to bootstrap the import system. If the "code" field of an entry in the custom array is NULL then that frozen module is treated as disabled, which allows a custom entry to disable a frozen stdlib module. This change allows us to get rid of is_essential_frozen_module() and simplifies the logic for which frozen modules should be ignored. https://bugs.python.org/issue45395
133 lines
5.6 KiB
C
133 lines
5.6 KiB
C
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/* Frozen modules initializer
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*
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* Frozen modules are written to header files by Programs/_freeze_module.
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* These files are typically put in Python/frozen_modules/. Each holds
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* an array of bytes named "_Py_M__<module>", which is used below.
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*
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* These files must be regenerated any time the corresponding .pyc
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* file would change (including with changes to the compiler, bytecode
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* format, marshal format). This can be done with "make regen-frozen".
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* That make target just runs Tools/scripts/freeze_modules.py.
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*
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* The freeze_modules.py script also determines which modules get
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* frozen. Update the list at the top of the script to add, remove,
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* or modify the target modules. Then run the script
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* (or run "make regen-frozen").
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*
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* The script does the following:
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*
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* 1. run Programs/_freeze_module on the target modules
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* 2. update the includes and _PyImport_FrozenModules[] in this file
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* 3. update the FROZEN_FILES variable in Makefile.pre.in
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* 4. update the per-module targets in Makefile.pre.in
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* 5. update the lists of modules in PCbuild/_freeze_module.vcxproj and
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* PCbuild/_freeze_module.vcxproj.filters
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*
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* (Note that most of the data in this file is auto-generated by the script.)
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*
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* Those steps can also be done manually, though this is not recommended.
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* Expect such manual changes to be removed the next time
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* freeze_modules.py runs.
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* */
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/* In order to test the support for frozen modules, by default we
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define some simple frozen modules: __hello__, __phello__ (a package),
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and __phello__.spam. Loading any will print some famous words... */
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#include "Python.h"
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#include "pycore_import.h"
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/* Includes for frozen modules: */
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#include "frozen_modules/importlib._bootstrap.h"
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#include "frozen_modules/importlib._bootstrap_external.h"
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#include "frozen_modules/zipimport.h"
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#include "frozen_modules/abc.h"
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#include "frozen_modules/codecs.h"
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#include "frozen_modules/io.h"
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#include "frozen_modules/_collections_abc.h"
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#include "frozen_modules/_sitebuiltins.h"
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#include "frozen_modules/genericpath.h"
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#include "frozen_modules/ntpath.h"
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#include "frozen_modules/posixpath.h"
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#include "frozen_modules/os.h"
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#include "frozen_modules/site.h"
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#include "frozen_modules/stat.h"
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#include "frozen_modules/__hello__.h"
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#include "frozen_modules/__phello__.h"
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#include "frozen_modules/__phello__.ham.h"
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#include "frozen_modules/__phello__.ham.eggs.h"
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#include "frozen_modules/__phello__.spam.h"
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#include "frozen_modules/frozen_only.h"
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/* End includes */
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/* Note that a negative size indicates a package. */
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static const struct _frozen bootstrap_modules[] = {
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{"_frozen_importlib", _Py_M__importlib__bootstrap,
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(int)sizeof(_Py_M__importlib__bootstrap)},
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{"_frozen_importlib_external", _Py_M__importlib__bootstrap_external,
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(int)sizeof(_Py_M__importlib__bootstrap_external)},
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{"zipimport", _Py_M__zipimport, (int)sizeof(_Py_M__zipimport)},
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{0, 0, 0} /* bootstrap sentinel */
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};
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static const struct _frozen stdlib_modules[] = {
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/* stdlib - startup, without site (python -S) */
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{"abc", _Py_M__abc, (int)sizeof(_Py_M__abc)},
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{"codecs", _Py_M__codecs, (int)sizeof(_Py_M__codecs)},
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{"io", _Py_M__io, (int)sizeof(_Py_M__io)},
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/* stdlib - startup, with site */
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{"_collections_abc", _Py_M___collections_abc,
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(int)sizeof(_Py_M___collections_abc)},
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{"_sitebuiltins", _Py_M___sitebuiltins, (int)sizeof(_Py_M___sitebuiltins)},
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{"genericpath", _Py_M__genericpath, (int)sizeof(_Py_M__genericpath)},
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{"ntpath", _Py_M__ntpath, (int)sizeof(_Py_M__ntpath)},
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{"posixpath", _Py_M__posixpath, (int)sizeof(_Py_M__posixpath)},
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{"os.path", _Py_M__posixpath, (int)sizeof(_Py_M__posixpath)},
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{"os", _Py_M__os, (int)sizeof(_Py_M__os)},
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{"site", _Py_M__site, (int)sizeof(_Py_M__site)},
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{"stat", _Py_M__stat, (int)sizeof(_Py_M__stat)},
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{0, 0, 0} /* stdlib sentinel */
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};
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static const struct _frozen test_modules[] = {
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{"__hello__", _Py_M____hello__, (int)sizeof(_Py_M____hello__)},
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{"__hello_alias__", _Py_M____hello__, (int)sizeof(_Py_M____hello__)},
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{"__phello_alias__", _Py_M____hello__, -(int)sizeof(_Py_M____hello__)},
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{"__phello_alias__.spam", _Py_M____hello__, (int)sizeof(_Py_M____hello__)},
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{"__phello__", _Py_M____phello__, -(int)sizeof(_Py_M____phello__)},
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{"__phello__.__init__", _Py_M____phello__, (int)sizeof(_Py_M____phello__)},
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{"__phello__.ham", _Py_M____phello___ham, -(int)sizeof(_Py_M____phello___ham)},
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{"__phello__.ham.__init__", _Py_M____phello___ham,
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(int)sizeof(_Py_M____phello___ham)},
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{"__phello__.ham.eggs", _Py_M____phello___ham_eggs,
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(int)sizeof(_Py_M____phello___ham_eggs)},
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{"__phello__.spam", _Py_M____phello___spam,
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(int)sizeof(_Py_M____phello___spam)},
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{"__hello_only__", _Py_M__frozen_only, (int)sizeof(_Py_M__frozen_only)},
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{0, 0, 0} /* test sentinel */
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};
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const struct _frozen *_PyImport_FrozenBootstrap = bootstrap_modules;
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const struct _frozen *_PyImport_FrozenStdlib = stdlib_modules;
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const struct _frozen *_PyImport_FrozenTest = test_modules;
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static const struct _module_alias aliases[] = {
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{"_frozen_importlib", "importlib._bootstrap"},
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{"_frozen_importlib_external", "importlib._bootstrap_external"},
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{"os.path", "posixpath"},
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{"__hello_alias__", "__hello__"},
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{"__phello_alias__", "__hello__"},
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{"__phello_alias__.spam", "__hello__"},
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{"__phello__.__init__", "<__phello__"},
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{"__phello__.ham.__init__", "<__phello__.ham"},
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{"__hello_only__", NULL},
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{0, 0} /* aliases sentinel */
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};
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const struct _module_alias *_PyImport_FrozenAliases = aliases;
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/* Embedding apps may change this pointer to point to their favorite
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collection of frozen modules: */
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const struct _frozen *PyImport_FrozenModules = NULL;
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