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gh-107954, PEP 741: Add PyConfig_Get()/Set() functions (#123472)

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Add PyConfig_Get(), PyConfig_GetInt(), PyConfig_Set() and
PyConfig_Names() functions to get and set the current runtime Python
configuration.

Add visibility and "sys spec" to config and preconfig specifications.

_PyConfig_AsDict() now converts PyConfig.xoptions as a dictionary.

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
This commit is contained in:
Victor Stinner 2024-09-02 23:25:08 +02:00 committed by GitHub
parent db42934270
commit 33b790978d
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
19 changed files with 1468 additions and 259 deletions
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69
Doc/c-api/init_config.rst
View File

@ -1605,6 +1605,75 @@ customized Python always running in isolated mode using
:c:func:`Py_RunMain`.
Runtime Python configuration API
================================
The configuration option *name* parameter must be a non-NULL null-terminated
UTF-8 encoded string.
Some options are read from the :mod:`sys` attributes. For example, the option
``"argv"`` is read from :data:`sys.argv`.
.. c:function:: PyObject* PyConfig_Get(const char *name)
Get the current runtime value of a configuration option as a Python object.
* Return a new reference on success.
* Set an exception and return ``NULL`` on error.
The object type depends on the configuration option. It can be:
* ``bool``
* ``int``
* ``str``
* ``list[str]``
* ``dict[str, str]``
The caller must hold the GIL. The function cannot be called before
Python initialization nor after Python finalization.
.. versionadded:: 3.14
.. c:function:: int PyConfig_GetInt(const char *name, int *value)
Similar to :c:func:`PyConfig_Get`, but get the value as a C int.
* Return ``0`` on success.
* Set an exception and return ``-1`` on error.
.. versionadded:: 3.14
.. c:function:: PyObject* PyConfig_Names(void)
Get all configuration option names as a ``frozenset``.
* Return a new reference on success.
* Set an exception and return ``NULL`` on error.
The caller must hold the GIL. The function cannot be called before
Python initialization nor after Python finalization.
.. versionadded:: 3.14
.. c:function:: int PyConfig_Set(const char *name, PyObject *value)
Set the current runtime value of a configuration option.
* Raise a :exc:`ValueError` if there is no option *name*.
* Raise a :exc:`ValueError` if *value* is an invalid value.
* Raise a :exc:`ValueError` if the option is read-only (cannot be set).
* Raise a :exc:`TypeError` if *value* has not the proper type.
The caller must hold the GIL. The function cannot be called before
Python initialization nor after Python finalization.
.. versionadded:: 3.14
Py_GetArgcArgv()
================

9
Doc/whatsnew/3.14.rst
View File

@ -492,6 +492,15 @@ New Features
* Add :c:func:`Py_HashBuffer` to compute and return the hash value of a buffer.
(Contributed by Antoine Pitrou and Victor Stinner in :gh:`122854`.)
* Add functions to get and set the current runtime Python configuration:
* :c:func:`PyConfig_Get`
* :c:func:`PyConfig_GetInt`
* :c:func:`PyConfig_Set`
* :c:func:`PyConfig_Names`
(Contributed by Victor Stinner in :gh:`107954`.)
Porting to Python 3.14
----------------------

8
Include/cpython/initconfig.h
View File

@ -260,6 +260,14 @@ PyAPI_FUNC(PyStatus) PyConfig_SetWideStringList(PyConfig *config,
Py_ssize_t length, wchar_t **items);
/* --- PyConfig_Get() ----------------------------------------- */
PyAPI_FUNC(PyObject*) PyConfig_Get(const char *name);
PyAPI_FUNC(int) PyConfig_GetInt(const char *name, int *value);
PyAPI_FUNC(PyObject*) PyConfig_Names(void);
PyAPI_FUNC(int) PyConfig_Set(const char *name, PyObject *value);
/* --- Helper functions --------------------------------------- */
/* Get the original command line arguments, before Python modified them.

2
Include/internal/pycore_initconfig.h
View File

@ -181,7 +181,7 @@ extern PyStatus _PyConfig_Write(const PyConfig *config,
extern PyStatus _PyConfig_SetPyArgv(
PyConfig *config,
const _PyArgv *args);
extern PyObject* _PyConfig_CreateXOptionsDict(const PyConfig *config);
extern void _Py_DumpPathConfig(PyThreadState *tstate);

3
Include/internal/pycore_sysmodule.h
View File

@ -29,6 +29,9 @@ extern int _PySys_SetAttr(PyObject *, PyObject *);
extern int _PySys_ClearAttrString(PyInterpreterState *interp,
const char *name, int verbose);
extern int _PySys_SetFlagObj(Py_ssize_t pos, PyObject *new_value);
extern int _PySys_SetIntMaxStrDigits(int maxdigits);
#ifdef __cplusplus
}
#endif

23
Lib/test/_test_embed_set_config.py
View File

@ -137,7 +137,8 @@ class SetConfigTests(unittest.TestCase):
'warnoptions',
'module_search_paths',
):
value_tests.append((key, invalid_wstrlist))
if key != 'xoptions':
value_tests.append((key, invalid_wstrlist))
type_tests.append((key, 123))
type_tests.append((key, "abc"))
type_tests.append((key, [123]))
@ -160,14 +161,14 @@ class SetConfigTests(unittest.TestCase):
def test_flags(self):
bool_options = set(BOOL_OPTIONS)
for sys_attr, key, value in (
("debug", "parser_debug", 1),
("inspect", "inspect", 2),
("interactive", "interactive", 3),
("optimize", "optimization_level", 4),
("verbose", "verbose", 1),
("bytes_warning", "bytes_warning", 10),
("quiet", "quiet", 11),
("isolated", "isolated", 12),
("debug", "parser_debug", 2),
("inspect", "inspect", 3),
("interactive", "interactive", 4),
("optimize", "optimization_level", 5),
("verbose", "verbose", 6),
("bytes_warning", "bytes_warning", 7),
("quiet", "quiet", 8),
("isolated", "isolated", 9),
):
with self.subTest(sys=sys_attr, key=key, value=value):
self.set_config(**{key: value, 'parse_argv': 0})
@ -228,9 +229,9 @@ class SetConfigTests(unittest.TestCase):
self.check(warnoptions=[])
self.check(warnoptions=["default", "ignore"])
self.set_config(xoptions=[])
self.set_config(xoptions={})
self.assertEqual(sys._xoptions, {})
self.set_config(xoptions=["dev", "tracemalloc=5"])
self.set_config(xoptions={"dev": True, "tracemalloc": "5"})
self.assertEqual(sys._xoptions, {"dev": True, "tracemalloc": "5"})
def test_pathconfig(self):

379
Lib/test/test_capi/test_config.py Normal file
View File

@ -0,0 +1,379 @@
"""
Tests PyConfig_Get() and PyConfig_Set() C API (PEP 741).
"""
import os
import sys
import sysconfig
import types
import unittest
from test import support
from test.support import import_helper
_testcapi = import_helper.import_module('_testcapi')
# Is the Py_STATS macro defined?
Py_STATS = hasattr(sys, '_stats_on')
class CAPITests(unittest.TestCase):
def test_config_get(self):
# Test PyConfig_Get()
config_get = _testcapi.config_get
config_names = _testcapi.config_names
TEST_VALUE = {
str: "TEST_MARKER_STR",
str | None: "TEST_MARKER_OPT_STR",
list[str]: ("TEST_MARKER_STR_TUPLE",),
dict[str, str | bool]: {"x": "value", "y": True},
}
# read config options and check their type
options = [
("allocator", int, None),
("argv", list[str], "argv"),
("base_exec_prefix", str | None, "base_exec_prefix"),
("base_executable", str | None, "_base_executable"),
("base_prefix", str | None, "base_prefix"),
("buffered_stdio", bool, None),
("bytes_warning", int, None),
("check_hash_pycs_mode", str, None),
("code_debug_ranges", bool, None),
("configure_c_stdio", bool, None),
("coerce_c_locale", bool, None),
("coerce_c_locale_warn", bool, None),
("configure_locale", bool, None),
("cpu_count", int, None),
("dev_mode", bool, None),
("dump_refs", bool, None),
("dump_refs_file", str | None, None),
("exec_prefix", str | None, "exec_prefix"),
("executable", str | None, "executable"),
("faulthandler", bool, None),
("filesystem_encoding", str, None),
("filesystem_errors", str, None),
("hash_seed", int, None),
("home", str | None, None),
("import_time", bool, None),
("inspect", bool, None),
("install_signal_handlers", bool, None),
("int_max_str_digits", int, None),
("interactive", bool, None),
("isolated", bool, None),
("malloc_stats", bool, None),
("module_search_paths", list[str], "path"),
("optimization_level", int, None),
("orig_argv", list[str], "orig_argv"),
("parser_debug", bool, None),
("parse_argv", bool, None),
("pathconfig_warnings", bool, None),
("perf_profiling", bool, None),
("platlibdir", str, "platlibdir"),
("prefix", str | None, "prefix"),
("program_name", str, None),
("pycache_prefix", str | None, "pycache_prefix"),
("quiet", bool, None),
("run_command", str | None, None),
("run_filename", str | None, None),
("run_module", str | None, None),
("safe_path", bool, None),
("show_ref_count", bool, None),
("site_import", bool, None),
("skip_source_first_line", bool, None),
("stdio_encoding", str, None),
("stdio_errors", str, None),
("stdlib_dir", str | None, "_stdlib_dir"),
("tracemalloc", int, None),
("use_environment", bool, None),
("use_frozen_modules", bool, None),
("use_hash_seed", bool, None),
("user_site_directory", bool, None),
("utf8_mode", bool, None),
("verbose", int, None),
("warn_default_encoding", bool, None),
("warnoptions", list[str], "warnoptions"),
("write_bytecode", bool, None),
("xoptions", dict[str, str | bool], "_xoptions"),
]
if support.Py_DEBUG:
options.append(("run_presite", str | None, None))
if sysconfig.get_config_var('Py_GIL_DISABLED'):
options.append(("enable_gil", int, None))
if support.MS_WINDOWS:
options.extend((
("legacy_windows_stdio", bool, None),
("legacy_windows_fs_encoding", bool, None),
))
if Py_STATS:
options.extend((
("_pystats", bool, None),
))
for name, option_type, sys_attr in options:
with self.subTest(name=name, option_type=option_type,
sys_attr=sys_attr):
value = config_get(name)
if isinstance(option_type, types.GenericAlias):
self.assertIsInstance(value, option_type.__origin__)
if option_type.__origin__ == dict:
key_type = option_type.__args__[0]
value_type = option_type.__args__[1]
for item in value.items():
self.assertIsInstance(item[0], key_type)
self.assertIsInstance(item[1], value_type)
else:
item_type = option_type.__args__[0]
for item in value:
self.assertIsInstance(item, item_type)
else:
self.assertIsInstance(value, option_type)
if sys_attr is not None:
expected = getattr(sys, sys_attr)
self.assertEqual(expected, value)
override = TEST_VALUE[option_type]
with support.swap_attr(sys, sys_attr, override):
self.assertEqual(config_get(name), override)
# check that the test checks all options
self.assertEqual(sorted(name for name, option_type, sys_attr in options),
sorted(config_names()))
def test_config_get_sys_flags(self):
# Test PyConfig_Get()
config_get = _testcapi.config_get
# compare config options with sys.flags
for flag, name, negate in (
("debug", "parser_debug", False),
("inspect", "inspect", False),
("interactive", "interactive", False),
("optimize", "optimization_level", False),
("dont_write_bytecode", "write_bytecode", True),
("no_user_site", "user_site_directory", True),
("no_site", "site_import", True),
("ignore_environment", "use_environment", True),
("verbose", "verbose", False),
("bytes_warning", "bytes_warning", False),
("quiet", "quiet", False),
# "hash_randomization" is tested below
("isolated", "isolated", False),
("dev_mode", "dev_mode", False),
("utf8_mode", "utf8_mode", False),
("warn_default_encoding", "warn_default_encoding", False),
("safe_path", "safe_path", False),
("int_max_str_digits", "int_max_str_digits", False),
# "gil" is tested below
):
with self.subTest(flag=flag, name=name, negate=negate):
value = config_get(name)
if negate:
value = not value
self.assertEqual(getattr(sys.flags, flag), value)
self.assertEqual(sys.flags.hash_randomization,
config_get('use_hash_seed') == 0
or config_get('hash_seed') != 0)
if sysconfig.get_config_var('Py_GIL_DISABLED'):
value = config_get('enable_gil')
expected = (value if value != -1 else None)
self.assertEqual(sys.flags.gil, expected)
def test_config_get_non_existent(self):
# Test PyConfig_Get() on non-existent option name
config_get = _testcapi.config_get
nonexistent_key = 'NONEXISTENT_KEY'
err_msg = f'unknown config option name: {nonexistent_key}'
with self.assertRaisesRegex(ValueError, err_msg):
config_get(nonexistent_key)
def test_config_get_write_bytecode(self):
# PyConfig_Get("write_bytecode") gets sys.dont_write_bytecode
# as an integer
config_get = _testcapi.config_get
with support.swap_attr(sys, "dont_write_bytecode", 0):
self.assertEqual(config_get('write_bytecode'), 1)
with support.swap_attr(sys, "dont_write_bytecode", "yes"):
self.assertEqual(config_get('write_bytecode'), 0)
with support.swap_attr(sys, "dont_write_bytecode", []):
self.assertEqual(config_get('write_bytecode'), 1)
def test_config_getint(self):
# Test PyConfig_GetInt()
config_getint = _testcapi.config_getint
# PyConfig_MEMBER_INT type
self.assertEqual(config_getint('verbose'), sys.flags.verbose)
# PyConfig_MEMBER_UINT type
self.assertEqual(config_getint('isolated'), sys.flags.isolated)
# PyConfig_MEMBER_ULONG type
self.assertIsInstance(config_getint('hash_seed'), int)
# PyPreConfig member
self.assertIsInstance(config_getint('allocator'), int)
# platlibdir type is str
with self.assertRaises(TypeError):
config_getint('platlibdir')
def test_get_config_names(self):
names = _testcapi.config_names()
self.assertIsInstance(names, frozenset)
for name in names:
self.assertIsInstance(name, str)
def test_config_set_sys_attr(self):
# Test PyConfig_Set() with sys attributes
config_get = _testcapi.config_get
config_set = _testcapi.config_set
# mutable configuration option mapped to sys attributes
for name, sys_attr, option_type in (
('argv', 'argv', list[str]),
('base_exec_prefix', 'base_exec_prefix', str | None),
('base_executable', '_base_executable', str | None),
('base_prefix', 'base_prefix', str | None),
('exec_prefix', 'exec_prefix', str | None),
('executable', 'executable', str | None),
('module_search_paths', 'path', list[str]),
('platlibdir', 'platlibdir', str),
('prefix', 'prefix', str | None),
('pycache_prefix', 'pycache_prefix', str | None),
('stdlib_dir', '_stdlib_dir', str | None),
('warnoptions', 'warnoptions', list[str]),
('xoptions', '_xoptions', dict[str, str | bool]),
):
with self.subTest(name=name):
if option_type == str:
test_values = ('TEST_REPLACE',)
invalid_types = (1, None)
elif option_type == str | None:
test_values = ('TEST_REPLACE', None)
invalid_types = (123,)
elif option_type == list[str]:
test_values = (['TEST_REPLACE'], [])
invalid_types = ('text', 123, [123])
else: # option_type == dict[str, str | bool]:
test_values = ({"x": "value", "y": True},)
invalid_types = ('text', 123, ['option'],
{123: 'value'},
{'key': b'bytes'})
old_opt_value = config_get(name)
old_sys_value = getattr(sys, sys_attr)
try:
for value in test_values:
config_set(name, value)
self.assertEqual(config_get(name), value)
self.assertEqual(getattr(sys, sys_attr), value)
for value in invalid_types:
with self.assertRaises(TypeError):
config_set(name, value)
finally:
setattr(sys, sys_attr, old_sys_value)
config_set(name, old_opt_value)
def test_config_set_sys_flag(self):
# Test PyConfig_Set() with sys.flags
config_get = _testcapi.config_get
config_set = _testcapi.config_set
# mutable configuration option mapped to sys.flags
class unsigned_int(int):
pass
def expect_int(value):
value = int(value)
return (value, value)
def expect_bool(value):
value = int(bool(value))
return (value, value)
def expect_bool_not(value):
value = bool(value)
return (int(value), int(not value))
for name, sys_flag, option_type, expect_func in (
# (some flags cannot be set, see comments below.)
('parser_debug', 'debug', bool, expect_bool),
('inspect', 'inspect', bool, expect_bool),
('interactive', 'interactive', bool, expect_bool),
('optimization_level', 'optimize', unsigned_int, expect_int),
('write_bytecode', 'dont_write_bytecode', bool, expect_bool_not),
# user_site_directory
# site_import
('use_environment', 'ignore_environment', bool, expect_bool_not),
('verbose', 'verbose', unsigned_int, expect_int),
('bytes_warning', 'bytes_warning', unsigned_int, expect_int),
('quiet', 'quiet', bool, expect_bool),
# hash_randomization
# isolated
# dev_mode
# utf8_mode
# warn_default_encoding
# safe_path
('int_max_str_digits', 'int_max_str_digits', unsigned_int, expect_int),
# gil
):
if name == "int_max_str_digits":
new_values = (0, 5_000, 999_999)
invalid_values = (-1, 40) # value must 0 or >= 4300
invalid_types = (1.0, "abc")
elif option_type == int:
new_values = (False, True, 0, 1, 5, -5)
invalid_values = ()
invalid_types = (1.0, "abc")
else:
new_values = (False, True, 0, 1, 5)
invalid_values = (-5,)
invalid_types = (1.0, "abc")
with self.subTest(name=name):
old_value = config_get(name)
try:
for value in new_values:
expected, expect_flag = expect_func(value)
config_set(name, value)
self.assertEqual(config_get(name), expected)
self.assertEqual(getattr(sys.flags, sys_flag), expect_flag)
if name == "write_bytecode":
self.assertEqual(getattr(sys, "dont_write_bytecode"),
expect_flag)
if name == "int_max_str_digits":
self.assertEqual(sys.get_int_max_str_digits(),
expect_flag)
for value in invalid_values:
with self.assertRaises(ValueError):
config_set(name, value)
for value in invalid_types:
with self.assertRaises(TypeError):
config_set(name, value)
finally:
config_set(name, old_value)
def test_config_set_read_only(self):
# Test PyConfig_Set() on read-only options
config_set = _testcapi.config_set
for name, value in (
("allocator", 0), # PyPreConfig member
("cpu_count", 8),
("dev_mode", True),
("filesystem_encoding", "utf-8"),
):
with self.subTest(name=name, value=value):
with self.assertRaisesRegex(ValueError, r"read-only"):
config_set(name, value)
if __name__ == "__main__":
unittest.main()

104
Lib/test/test_embed.py
View File

@ -508,30 +508,30 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
PRE_CONFIG_COMPAT = {
'_config_init': API_COMPAT,
'allocator': PYMEM_ALLOCATOR_NOT_SET,
'parse_argv': 0,
'configure_locale': 1,
'coerce_c_locale': 0,
'coerce_c_locale_warn': 0,
'utf8_mode': 0,
'parse_argv': False,
'configure_locale': True,
'coerce_c_locale': False,
'coerce_c_locale_warn': False,
'utf8_mode': False,
}
if MS_WINDOWS:
PRE_CONFIG_COMPAT.update({
'legacy_windows_fs_encoding': 0,
'legacy_windows_fs_encoding': False,
})
PRE_CONFIG_PYTHON = dict(PRE_CONFIG_COMPAT,
_config_init=API_PYTHON,
parse_argv=1,
parse_argv=True,
coerce_c_locale=GET_DEFAULT_CONFIG,
utf8_mode=GET_DEFAULT_CONFIG,
)
PRE_CONFIG_ISOLATED = dict(PRE_CONFIG_COMPAT,
_config_init=API_ISOLATED,
configure_locale=0,
isolated=1,
use_environment=0,
utf8_mode=0,
dev_mode=0,
coerce_c_locale=0,
configure_locale=False,
isolated=True,
use_environment=False,
utf8_mode=False,
dev_mode=False,
coerce_c_locale=False,
)
COPY_PRE_CONFIG = [
@ -570,7 +570,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'argv': [""],
'orig_argv': [],
'xoptions': [],
'xoptions': {},
'warnoptions': [],
'pythonpath_env': None,
@ -619,14 +619,14 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'_is_python_build': IGNORE_CONFIG,
}
if Py_STATS:
CONFIG_COMPAT['_pystats'] = 0
CONFIG_COMPAT['_pystats'] = False
if support.Py_DEBUG:
CONFIG_COMPAT['run_presite'] = None
if support.Py_GIL_DISABLED:
CONFIG_COMPAT['enable_gil'] = -1
if MS_WINDOWS:
CONFIG_COMPAT.update({
'legacy_windows_stdio': 0,
'legacy_windows_stdio': False,
})
CONFIG_PYTHON = dict(CONFIG_COMPAT,
@ -644,12 +644,12 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
install_signal_handlers=False,
use_hash_seed=False,
faulthandler=False,
tracemalloc=0,
tracemalloc=False,
perf_profiling=False,
pathconfig_warnings=False,
)
if MS_WINDOWS:
CONFIG_ISOLATED['legacy_windows_stdio'] = 0
CONFIG_ISOLATED['legacy_windows_stdio'] = False
# global config
DEFAULT_GLOBAL_CONFIG = {
@ -928,23 +928,23 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
def test_init_global_config(self):
preconfig = {
'utf8_mode': 1,
'utf8_mode': True,
}
config = {
'program_name': './globalvar',
'site_import': 0,
'bytes_warning': 1,
'site_import': False,
'bytes_warning': True,
'warnoptions': ['default::BytesWarning'],
'inspect': 1,
'interactive': 1,
'inspect': True,
'interactive': True,
'optimization_level': 2,
'write_bytecode': 0,
'verbose': 1,
'quiet': 1,
'buffered_stdio': 0,
'write_bytecode': False,
'verbose': True,
'quiet': True,
'buffered_stdio': False,
'user_site_directory': 0,
'pathconfig_warnings': 0,
'user_site_directory': False,
'pathconfig_warnings': False,
}
self.check_all_configs("test_init_global_config", config, preconfig,
api=API_COMPAT)
@ -952,7 +952,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
def test_init_from_config(self):
preconfig = {
'allocator': ALLOCATOR_FOR_CONFIG,
'utf8_mode': 1,
'utf8_mode': True,
}
config = {
'install_signal_handlers': False,
@ -977,12 +977,12 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'-c', 'pass',
'arg2'],
'parse_argv': True,
'xoptions': [
'config_xoption1=3',
'config_xoption2=',
'config_xoption3',
'cmdline_xoption',
],
'xoptions': {
'config_xoption1': '3',
'config_xoption2': '',
'config_xoption3': True,
'cmdline_xoption': True,
},
'warnoptions': [
'cmdline_warnoption',
'default::BytesWarning',
@ -1126,7 +1126,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'dev_mode': True,
'faulthandler': True,
'warnoptions': ['default'],
'xoptions': ['dev'],
'xoptions': {'dev': True},
'safe_path': True,
}
self.check_all_configs("test_preinit_parse_argv", config, preconfig,
@ -1135,7 +1135,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
def test_preinit_dont_parse_argv(self):
# -X dev must be ignored by isolated preconfiguration
preconfig = {
'isolated': 0,
'isolated': False,
}
argv = ["python3",
"-E", "-I", "-P",
@ -1145,7 +1145,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
config = {
'argv': argv,
'orig_argv': argv,
'isolated': 0,
'isolated': False,
}
self.check_all_configs("test_preinit_dont_parse_argv", config, preconfig,
api=API_ISOLATED)
@ -1218,12 +1218,12 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
def test_init_sys_add(self):
config = {
'faulthandler': 1,
'xoptions': [
'config_xoption',
'cmdline_xoption',
'sysadd_xoption',
'faulthandler',
],
'xoptions': {
'config_xoption': True,
'cmdline_xoption': True,
'sysadd_xoption': True,
'faulthandler': True,
},
'warnoptions': [
'ignore:::cmdline_warnoption',
'ignore:::sysadd_warnoption',
@ -1259,7 +1259,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'program_name': './python3',
'run_command': code + '\n',
'parse_argv': True,
'_init_main': 0,
'_init_main': False,
'sys_path_0': '',
}
self.check_all_configs("test_init_main", config,
@ -1637,12 +1637,12 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
config['base_prefix'] = pyvenv_home
config['prefix'] = pyvenv_home
config['stdlib_dir'] = os.path.join(pyvenv_home, 'Lib')
config['use_frozen_modules'] = int(not support.Py_DEBUG)
config['use_frozen_modules'] = bool(not support.Py_DEBUG)
else:
# cannot reliably assume stdlib_dir here because it
# depends too much on our build. But it ought to be found
config['stdlib_dir'] = self.IGNORE_CONFIG
config['use_frozen_modules'] = int(not support.Py_DEBUG)
config['use_frozen_modules'] = bool(not support.Py_DEBUG)
env = self.copy_paths_by_env(config)
self.check_all_configs("test_init_compat_config", config,
@ -1706,7 +1706,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
config = _testinternalcapi.get_configs()['config']
self.assertEqual(Py_GetPath().split(os.path.pathsep),
self.assertEqual(tuple(Py_GetPath().split(os.path.pathsep)),
config['module_search_paths'])
self.assertEqual(Py_GetPrefix(), config['prefix'])
self.assertEqual(Py_GetExecPrefix(), config['exec_prefix'])
@ -1763,6 +1763,10 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
}
for raw, expected in tests:
optval = f'frozen_modules{raw}'
if raw.startswith('='):
xoption_value = raw[1:]
else:
xoption_value = True
config = {
'parse_argv': True,
'argv': ['-c'],
@ -1770,7 +1774,7 @@ class InitConfigTests(EmbeddingTestsMixin, unittest.TestCase):
'program_name': './argv0',
'run_command': 'pass\n',
'use_environment': True,
'xoptions': [optval],
'xoptions': {'frozen_modules': xoption_value},
'use_frozen_modules': expected,
}
env = {'TESTFROZEN': raw[1:]} if raw else None

8
Misc/NEWS.d/next/C_API/2024-08-29-15-55-55.gh-issue-107954.pr2O50.rst Normal file
View File

@ -0,0 +1,8 @@
Add functions to get and set the current runtime Python configuration:
* :c:func:`PyConfig_Get`
* :c:func:`PyConfig_GetInt`
* :c:func:`PyConfig_Set`
* :c:func:`PyConfig_Names`
Patch by Victor Stinner.

2
Modules/Setup.stdlib.in
View File

@ -162,7 +162,7 @@
@MODULE__XXTESTFUZZ_TRUE@_xxtestfuzz _xxtestfuzz/_xxtestfuzz.c _xxtestfuzz/fuzzer.c
@MODULE__TESTBUFFER_TRUE@_testbuffer _testbuffer.c
@MODULE__TESTINTERNALCAPI_TRUE@_testinternalcapi _testinternalcapi.c _testinternalcapi/test_lock.c _testinternalcapi/pytime.c _testinternalcapi/set.c _testinternalcapi/test_critical_sections.c
@MODULE__TESTCAPI_TRUE@_testcapi _testcapimodule.c _testcapi/vectorcall.c _testcapi/heaptype.c _testcapi/abstract.c _testcapi/unicode.c _testcapi/dict.c _testcapi/set.c _testcapi/list.c _testcapi/tuple.c _testcapi/getargs.c _testcapi/datetime.c _testcapi/docstring.c _testcapi/mem.c _testcapi/watchers.c _testcapi/long.c _testcapi/float.c _testcapi/complex.c _testcapi/numbers.c _testcapi/structmember.c _testcapi/exceptions.c _testcapi/code.c _testcapi/buffer.c _testcapi/pyatomic.c _testcapi/run.c _testcapi/file.c _testcapi/codec.c _testcapi/immortal.c _testcapi/gc.c _testcapi/hash.c _testcapi/time.c _testcapi/bytes.c _testcapi/object.c _testcapi/monitoring.c
@MODULE__TESTCAPI_TRUE@_testcapi _testcapimodule.c _testcapi/vectorcall.c _testcapi/heaptype.c _testcapi/abstract.c _testcapi/unicode.c _testcapi/dict.c _testcapi/set.c _testcapi/list.c _testcapi/tuple.c _testcapi/getargs.c _testcapi/datetime.c _testcapi/docstring.c _testcapi/mem.c _testcapi/watchers.c _testcapi/long.c _testcapi/float.c _testcapi/complex.c _testcapi/numbers.c _testcapi/structmember.c _testcapi/exceptions.c _testcapi/code.c _testcapi/buffer.c _testcapi/pyatomic.c _testcapi/run.c _testcapi/file.c _testcapi/codec.c _testcapi/immortal.c _testcapi/gc.c _testcapi/hash.c _testcapi/time.c _testcapi/bytes.c _testcapi/object.c _testcapi/monitoring.c _testcapi/config.c
@MODULE__TESTLIMITEDCAPI_TRUE@_testlimitedcapi _testlimitedcapi.c _testlimitedcapi/abstract.c _testlimitedcapi/bytearray.c _testlimitedcapi/bytes.c _testlimitedcapi/complex.c _testlimitedcapi/dict.c _testlimitedcapi/eval.c _testlimitedcapi/float.c _testlimitedcapi/heaptype_relative.c _testlimitedcapi/list.c _testlimitedcapi/long.c _testlimitedcapi/object.c _testlimitedcapi/pyos.c _testlimitedcapi/set.c _testlimitedcapi/sys.c _testlimitedcapi/tuple.c _testlimitedcapi/unicode.c _testlimitedcapi/vectorcall_limited.c
@MODULE__TESTCLINIC_TRUE@_testclinic _testclinic.c
@MODULE__TESTCLINIC_LIMITED_TRUE@_testclinic_limited _testclinic_limited.c

68
Modules/_testcapi/config.c Normal file
View File

@ -0,0 +1,68 @@
#include "parts.h"
static PyObject *
_testcapi_config_get(PyObject *module, PyObject *name_obj)
{
const char *name;
if (PyArg_Parse(name_obj, "s", &name) < 0) {
return NULL;
}
return PyConfig_Get(name);
}
static PyObject *
_testcapi_config_getint(PyObject *module, PyObject *name_obj)
{
const char *name;
if (PyArg_Parse(name_obj, "s", &name) < 0) {
return NULL;
}
int value;
if (PyConfig_GetInt(name, &value) < 0) {
return NULL;
}
return PyLong_FromLong(value);
}
static PyObject *
_testcapi_config_names(PyObject *module, PyObject* Py_UNUSED(args))
{
return PyConfig_Names();
}
static PyObject *
_testcapi_config_set(PyObject *module, PyObject *args)
{
const char *name;
PyObject *value;
if (PyArg_ParseTuple(args, "sO", &name, &value) < 0) {
return NULL;
}
int res = PyConfig_Set(name, value);
if (res < 0) {
return NULL;
}
Py_RETURN_NONE;
}
static PyMethodDef test_methods[] = {
{"config_get", _testcapi_config_get, METH_O},
{"config_getint", _testcapi_config_getint, METH_O},
{"config_names", _testcapi_config_names, METH_NOARGS},
{"config_set", _testcapi_config_set, METH_VARARGS},
{NULL}
};
int
_PyTestCapi_Init_Config(PyObject *mod)
{
return PyModule_AddFunctions(mod, test_methods);
}

1
Modules/_testcapi/parts.h
View File

@ -60,5 +60,6 @@ int _PyTestCapi_Init_Hash(PyObject *module);
int _PyTestCapi_Init_Time(PyObject *module);
int _PyTestCapi_Init_Monitoring(PyObject *module);
int _PyTestCapi_Init_Object(PyObject *module);
int _PyTestCapi_Init_Config(PyObject *mod);
#endif // Py_TESTCAPI_PARTS_H

3
Modules/_testcapimodule.c
View File

@ -4172,6 +4172,9 @@ PyInit__testcapi(void)
if (_PyTestCapi_Init_Object(m) < 0) {
return NULL;
}
if (_PyTestCapi_Init_Config(m) < 0) {
return NULL;
}
PyState_AddModule(m, &_testcapimodule);
return m;

1
PCbuild/_testcapi.vcxproj
View File

@ -126,6 +126,7 @@
<ClCompile Include="..\Modules\_testcapi\gc.c" />
<ClCompile Include="..\Modules\_testcapi\run.c" />
<ClCompile Include="..\Modules\_testcapi\monitoring.c" />
<ClCompile Include="..\Modules\_testcapi\config.c" />
</ItemGroup>
<ItemGroup>
<ResourceCompile Include="..\PC\python_nt.rc" />

3
PCbuild/_testcapi.vcxproj.filters
View File

@ -111,6 +111,9 @@
<ClCompile Include="..\Modules\_testcapi\monitoring.c">
<Filter>Source Files</Filter>
</ClCompile>
<ClCompile Include="..\Modules\_testcapi\config.c">
<Filter>Source Files</Filter>
</ClCompile>
</ItemGroup>
<ItemGroup>
<ResourceCompile Include="..\PC\python_nt.rc">

898
Python/initconfig.c
View File

@ -10,6 +10,7 @@
#include "pycore_pymem.h" // _PyMem_SetDefaultAllocator()
#include "pycore_pystate.h" // _PyThreadState_GET()
#include "pycore_pystats.h" // _Py_StatsOn()
#include "pycore_sysmodule.h" // _PySys_SetIntMaxStrDigits()
#include "osdefs.h" // DELIM
@ -26,6 +27,22 @@
#include "config_common.h"
/* --- PyConfig setters ------------------------------------------- */
typedef PyObject* (*config_sys_flag_setter) (int value);
static PyObject*
config_sys_flag_long(int value)
{
return PyLong_FromLong(value);
}
static PyObject*
config_sys_flag_not(int value)
{
value = (!value);
return config_sys_flag_long(value);
}
/* --- PyConfig spec ---------------------------------------------- */
@ -40,99 +57,174 @@ typedef enum {
PyConfig_MEMBER_WSTR_LIST = 12,
} PyConfigMemberType;
typedef enum {
// Option which cannot be get or set by PyConfig_Get() and PyConfig_Set()
PyConfig_MEMBER_INIT_ONLY = 0,
// Option which cannot be set by PyConfig_Set()
PyConfig_MEMBER_READ_ONLY = 1,
// Public option: can be get and set by PyConfig_Get() and PyConfig_Set()
PyConfig_MEMBER_PUBLIC = 2,
} PyConfigMemberVisibility;
typedef struct {
const char *attr;
int flag_index;
config_sys_flag_setter flag_setter;
} PyConfigSysSpec;
typedef struct {
const char *name;
size_t offset;
PyConfigMemberType type;
PyConfigMemberVisibility visibility;
PyConfigSysSpec sys;
} PyConfigSpec;
#define SPEC(MEMBER, TYPE) \
{#MEMBER, offsetof(PyConfig, MEMBER), PyConfig_MEMBER_##TYPE}
#define SPEC(MEMBER, TYPE, VISIBILITY, sys) \
{#MEMBER, offsetof(PyConfig, MEMBER), \
PyConfig_MEMBER_##TYPE, PyConfig_MEMBER_##VISIBILITY, sys}
#define SYS_ATTR(name) {name, -1, NULL}
#define SYS_FLAG_SETTER(index, setter) {NULL, index, setter}
#define SYS_FLAG(index) SYS_FLAG_SETTER(index, NULL)
#define NO_SYS SYS_ATTR(NULL)
// Update _test_embed_set_config when adding new members
static const PyConfigSpec PYCONFIG_SPEC[] = {
SPEC(_config_init, UINT),
SPEC(isolated, BOOL),
SPEC(use_environment, BOOL),
SPEC(dev_mode, BOOL),
SPEC(install_signal_handlers, BOOL),
SPEC(use_hash_seed, BOOL),
SPEC(hash_seed, ULONG),
SPEC(faulthandler, BOOL),
SPEC(tracemalloc, UINT),
SPEC(perf_profiling, UINT),
SPEC(import_time, BOOL),
SPEC(code_debug_ranges, BOOL),
SPEC(show_ref_count, BOOL),
SPEC(dump_refs, BOOL),
SPEC(dump_refs_file, WSTR_OPT),
SPEC(malloc_stats, BOOL),
SPEC(filesystem_encoding, WSTR),
SPEC(filesystem_errors, WSTR),
SPEC(pycache_prefix, WSTR_OPT),
SPEC(parse_argv, BOOL),
SPEC(orig_argv, WSTR_LIST),
SPEC(argv, WSTR_LIST),
SPEC(xoptions, WSTR_LIST),
SPEC(warnoptions, WSTR_LIST),
SPEC(site_import, BOOL),
SPEC(bytes_warning, UINT),
SPEC(warn_default_encoding, BOOL),
SPEC(inspect, BOOL),
SPEC(interactive, BOOL),
SPEC(optimization_level, UINT),
SPEC(parser_debug, BOOL),
SPEC(write_bytecode, BOOL),
SPEC(verbose, UINT),
SPEC(quiet, BOOL),
SPEC(user_site_directory, BOOL),
SPEC(configure_c_stdio, BOOL),
SPEC(buffered_stdio, BOOL),
SPEC(stdio_encoding, WSTR),
SPEC(stdio_errors, WSTR),
#ifdef MS_WINDOWS
SPEC(legacy_windows_stdio, BOOL),
#endif
SPEC(check_hash_pycs_mode, WSTR),
SPEC(use_frozen_modules, BOOL),
SPEC(safe_path, BOOL),
SPEC(int_max_str_digits, INT),
SPEC(cpu_count, INT),
#ifdef Py_GIL_DISABLED
SPEC(enable_gil, INT),
#endif
SPEC(pathconfig_warnings, BOOL),
SPEC(program_name, WSTR),
SPEC(pythonpath_env, WSTR_OPT),
SPEC(home, WSTR_OPT),
SPEC(platlibdir, WSTR),
SPEC(sys_path_0, WSTR_OPT),
SPEC(module_search_paths_set, BOOL),
SPEC(module_search_paths, WSTR_LIST),
SPEC(stdlib_dir, WSTR_OPT),
SPEC(executable, WSTR_OPT),
SPEC(base_executable, WSTR_OPT),
SPEC(prefix, WSTR_OPT),
SPEC(base_prefix, WSTR_OPT),
SPEC(exec_prefix, WSTR_OPT),
SPEC(base_exec_prefix, WSTR_OPT),
SPEC(skip_source_first_line, BOOL),
SPEC(run_command, WSTR_OPT),
SPEC(run_module, WSTR_OPT),
SPEC(run_filename, WSTR_OPT),
SPEC(_install_importlib, BOOL),
SPEC(_init_main, BOOL),
SPEC(_is_python_build, BOOL),
// --- Public options -----------
SPEC(argv, WSTR_LIST, PUBLIC, SYS_ATTR("argv")),
SPEC(base_exec_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("base_exec_prefix")),
SPEC(base_executable, WSTR_OPT, PUBLIC, SYS_ATTR("_base_executable")),
SPEC(base_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("base_prefix")),
SPEC(bytes_warning, UINT, PUBLIC, SYS_FLAG(9)),
SPEC(exec_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("exec_prefix")),
SPEC(executable, WSTR_OPT, PUBLIC, SYS_ATTR("executable")),
SPEC(inspect, BOOL, PUBLIC, SYS_FLAG(1)),
SPEC(int_max_str_digits, UINT, PUBLIC, NO_SYS),
SPEC(interactive, BOOL, PUBLIC, SYS_FLAG(2)),
SPEC(module_search_paths, WSTR_LIST, PUBLIC, SYS_ATTR("path")),
SPEC(optimization_level, UINT, PUBLIC, SYS_FLAG(3)),
SPEC(parser_debug, BOOL, PUBLIC, SYS_FLAG(0)),
SPEC(platlibdir, WSTR, PUBLIC, SYS_ATTR("platlibdir")),
SPEC(prefix, WSTR_OPT, PUBLIC, SYS_ATTR("prefix")),
SPEC(pycache_prefix, WSTR_OPT, PUBLIC, SYS_ATTR("pycache_prefix")),
SPEC(quiet, BOOL, PUBLIC, SYS_FLAG(10)),
SPEC(stdlib_dir, WSTR_OPT, PUBLIC, SYS_ATTR("_stdlib_dir")),
SPEC(use_environment, BOOL, PUBLIC, SYS_FLAG_SETTER(7, config_sys_flag_not)),
SPEC(verbose, UINT, PUBLIC, SYS_FLAG(8)),
SPEC(warnoptions, WSTR_LIST, PUBLIC, SYS_ATTR("warnoptions")),
SPEC(write_bytecode, BOOL, PUBLIC, SYS_FLAG_SETTER(4, config_sys_flag_not)),
SPEC(xoptions, WSTR_LIST, PUBLIC, SYS_ATTR("_xoptions")),
// --- Read-only options -----------
#ifdef Py_STATS
SPEC(_pystats, BOOL),
SPEC(_pystats, BOOL, READ_ONLY, NO_SYS),
#endif
SPEC(buffered_stdio, BOOL, READ_ONLY, NO_SYS),
SPEC(check_hash_pycs_mode, WSTR, READ_ONLY, NO_SYS),
SPEC(code_debug_ranges, BOOL, READ_ONLY, NO_SYS),
SPEC(configure_c_stdio, BOOL, READ_ONLY, NO_SYS),
SPEC(cpu_count, INT, READ_ONLY, NO_SYS),
SPEC(dev_mode, BOOL, READ_ONLY, NO_SYS), // sys.flags.dev_mode
SPEC(dump_refs, BOOL, READ_ONLY, NO_SYS),
SPEC(dump_refs_file, WSTR_OPT, READ_ONLY, NO_SYS),
#ifdef Py_GIL_DISABLED
SPEC(enable_gil, INT, READ_ONLY, NO_SYS),
#endif
SPEC(faulthandler, BOOL, READ_ONLY, NO_SYS),
SPEC(filesystem_encoding, WSTR, READ_ONLY, NO_SYS),
SPEC(filesystem_errors, WSTR, READ_ONLY, NO_SYS),
SPEC(hash_seed, ULONG, READ_ONLY, NO_SYS),
SPEC(home, WSTR_OPT, READ_ONLY, NO_SYS),
SPEC(import_time, BOOL, READ_ONLY, NO_SYS),
SPEC(install_signal_handlers, BOOL, READ_ONLY, NO_SYS),
SPEC(isolated, BOOL, READ_ONLY, NO_SYS), // sys.flags.isolated
#ifdef MS_WINDOWS
SPEC(legacy_windows_stdio, BOOL, READ_ONLY, NO_SYS),
#endif
SPEC(malloc_stats, BOOL, READ_ONLY, NO_SYS),
SPEC(orig_argv, WSTR_LIST, READ_ONLY, SYS_ATTR("orig_argv")),
SPEC(parse_argv, BOOL, READ_ONLY, NO_SYS),
SPEC(pathconfig_warnings, BOOL, READ_ONLY, NO_SYS),
SPEC(perf_profiling, BOOL, READ_ONLY, NO_SYS),
SPEC(program_name, WSTR, READ_ONLY, NO_SYS),
SPEC(run_command, WSTR_OPT, READ_ONLY, NO_SYS),
SPEC(run_filename, WSTR_OPT, READ_ONLY, NO_SYS),
SPEC(run_module, WSTR_OPT, READ_ONLY, NO_SYS),
#ifdef Py_DEBUG
SPEC(run_presite, WSTR_OPT),
SPEC(run_presite, WSTR_OPT, READ_ONLY, NO_SYS),
#endif
{NULL, 0, 0},
SPEC(safe_path, BOOL, READ_ONLY, NO_SYS),
SPEC(show_ref_count, BOOL, READ_ONLY, NO_SYS),
SPEC(site_import, BOOL, READ_ONLY, NO_SYS), // sys.flags.no_site
SPEC(skip_source_first_line, BOOL, READ_ONLY, NO_SYS),
SPEC(stdio_encoding, WSTR, READ_ONLY, NO_SYS),
SPEC(stdio_errors, WSTR, READ_ONLY, NO_SYS),
SPEC(tracemalloc, UINT, READ_ONLY, NO_SYS),
SPEC(use_frozen_modules, BOOL, READ_ONLY, NO_SYS),
SPEC(use_hash_seed, BOOL, READ_ONLY, NO_SYS),
SPEC(user_site_directory, BOOL, READ_ONLY, NO_SYS), // sys.flags.no_user_site
SPEC(warn_default_encoding, BOOL, READ_ONLY, NO_SYS),
// --- Init-only options -----------
SPEC(_config_init, UINT, INIT_ONLY, NO_SYS),
SPEC(_init_main, BOOL, INIT_ONLY, NO_SYS),
SPEC(_install_importlib, BOOL, INIT_ONLY, NO_SYS),
SPEC(_is_python_build, BOOL, INIT_ONLY, NO_SYS),
SPEC(module_search_paths_set, BOOL, INIT_ONLY, NO_SYS),
SPEC(pythonpath_env, WSTR_OPT, INIT_ONLY, NO_SYS),
SPEC(sys_path_0, WSTR_OPT, INIT_ONLY, NO_SYS),
// Array terminator
{NULL, 0, 0, 0, NO_SYS},
};
#undef SPEC
#define SPEC(MEMBER, TYPE, VISIBILITY) \
{#MEMBER, offsetof(PyPreConfig, MEMBER), PyConfig_MEMBER_##TYPE, \
PyConfig_MEMBER_##VISIBILITY, NO_SYS}
static const PyConfigSpec PYPRECONFIG_SPEC[] = {
// --- Read-only options -----------
SPEC(allocator, INT, READ_ONLY),
SPEC(coerce_c_locale, BOOL, READ_ONLY),
SPEC(coerce_c_locale_warn, BOOL, READ_ONLY),
SPEC(configure_locale, BOOL, READ_ONLY),
#ifdef MS_WINDOWS
SPEC(legacy_windows_fs_encoding, BOOL, READ_ONLY),
#endif
SPEC(utf8_mode, BOOL, READ_ONLY),
// --- Init-only options -----------
// Members already present in PYCONFIG_SPEC
SPEC(_config_init, INT, INIT_ONLY),
SPEC(dev_mode, BOOL, INIT_ONLY),
SPEC(isolated, BOOL, INIT_ONLY),
SPEC(parse_argv, BOOL, INIT_ONLY),
SPEC(use_environment, BOOL, INIT_ONLY),
// Array terminator
{NULL, 0, 0, 0, NO_SYS},
};
#undef SPEC
#undef SYS_ATTR
#undef SYS_FLAG_SETTER
#undef SYS_FLAG
#undef NO_SYS
// Forward declarations
static PyObject*
config_get(const PyConfig *config, const PyConfigSpec *spec,
int use_sys);
/* --- Command line options --------------------------------------- */
@ -656,6 +748,28 @@ _PyWideStringList_AsList(const PyWideStringList *list)
}
static PyObject*
_PyWideStringList_AsTuple(const PyWideStringList *list)
{
assert(_PyWideStringList_CheckConsistency(list));
PyObject *tuple = PyTuple_New(list->length);
if (tuple == NULL) {
return NULL;
}
for (Py_ssize_t i = 0; i < list->length; i++) {
PyObject *item = PyUnicode_FromWideChar(list->items[i], -1);
if (item == NULL) {
Py_DECREF(tuple);
return NULL;
}
PyTuple_SET_ITEM(tuple, i, item);
}
return tuple;
}
/* --- Py_GetArgcArgv() ------------------------------------------- */
void
@ -1059,54 +1173,12 @@ _PyConfig_AsDict(const PyConfig *config)
const PyConfigSpec *spec = PYCONFIG_SPEC;
for (; spec->name != NULL; spec++) {
char *member = (char *)config + spec->offset;
PyObject *obj;
switch (spec->type) {
case PyConfig_MEMBER_INT:
case PyConfig_MEMBER_UINT:
{
int value = *(int*)member;
obj = PyLong_FromLong(value);
break;
}
case PyConfig_MEMBER_BOOL:
{
int value = *(int*)member;
obj = PyBool_FromLong(value);
break;
}
case PyConfig_MEMBER_ULONG:
{
unsigned long value = *(unsigned long*)member;
obj = PyLong_FromUnsignedLong(value);
break;
}
case PyConfig_MEMBER_WSTR:
case PyConfig_MEMBER_WSTR_OPT:
{
const wchar_t *wstr = *(const wchar_t**)member;
if (wstr != NULL) {
obj = PyUnicode_FromWideChar(wstr, -1);
}
else {
obj = Py_NewRef(Py_None);
}
break;
}
case PyConfig_MEMBER_WSTR_LIST:
{
const PyWideStringList *list = (const PyWideStringList*)member;
obj = _PyWideStringList_AsList(list);
break;
}
default:
Py_UNREACHABLE();
}
PyObject *obj = config_get(config, spec, 0);
if (obj == NULL) {
Py_DECREF(dict);
return NULL;
}
int res = PyDict_SetItemString(dict, spec->name, obj);
Py_DECREF(obj);
if (res < 0) {
@ -1218,15 +1290,17 @@ config_dict_get_wstrlist(PyObject *dict, const char *name, PyConfig *config,
return -1;
}
if (!PyList_CheckExact(list)) {
int is_list = PyList_CheckExact(list);
if (!is_list && !PyTuple_CheckExact(list)) {
Py_DECREF(list);
config_dict_invalid_type(name);
return -1;
}
PyWideStringList wstrlist = _PyWideStringList_INIT;
for (Py_ssize_t i=0; i < PyList_GET_SIZE(list); i++) {
PyObject *item = PyList_GET_ITEM(list, i);
Py_ssize_t len = is_list ? PyList_GET_SIZE(list) : PyTuple_GET_SIZE(list);
for (Py_ssize_t i=0; i < len; i++) {
PyObject *item = is_list ? PyList_GET_ITEM(list, i) : PyTuple_GET_ITEM(list, i);
if (item == Py_None) {
config_dict_invalid_value(name);
@ -1263,6 +1337,66 @@ error:
}
static int
config_dict_get_xoptions(PyObject *dict, const char *name, PyConfig *config,
PyWideStringList *result)
{
PyObject *xoptions = config_dict_get(dict, name);
if (xoptions == NULL) {
return -1;
}
if (!PyDict_CheckExact(xoptions)) {
Py_DECREF(xoptions);
config_dict_invalid_type(name);
return -1;
}
Py_ssize_t pos = 0;
PyObject *key, *value;
PyWideStringList wstrlist = _PyWideStringList_INIT;
while (PyDict_Next(xoptions, &pos, &key, &value)) {
PyObject *item;
if (value != Py_True) {
item = PyUnicode_FromFormat("%S=%S", key, value);
if (item == NULL) {
goto error;
}
}
else {
item = Py_NewRef(key);
}
wchar_t *wstr = PyUnicode_AsWideCharString(item, NULL);
Py_DECREF(item);
if (wstr == NULL) {
goto error;
}
PyStatus status = PyWideStringList_Append(&wstrlist, wstr);
PyMem_Free(wstr);
if (_PyStatus_EXCEPTION(status)) {
PyErr_NoMemory();
goto error;
}
}
if (_PyWideStringList_Copy(result, &wstrlist) < 0) {
PyErr_NoMemory();
goto error;
}
_PyWideStringList_Clear(&wstrlist);
Py_DECREF(xoptions);
return 0;
error:
_PyWideStringList_Clear(&wstrlist);
Py_DECREF(xoptions);
return -1;
}
int
_PyConfig_FromDict(PyConfig *config, PyObject *dict)
{
@ -1324,9 +1458,17 @@ _PyConfig_FromDict(PyConfig *config, PyObject *dict)
}
case PyConfig_MEMBER_WSTR_LIST:
{
if (config_dict_get_wstrlist(dict, spec->name, config,
(PyWideStringList*)member) < 0) {
return -1;
if (strcmp(spec->name, "xoptions") == 0) {
if (config_dict_get_xoptions(dict, spec->name, config,
(PyWideStringList*)member) < 0) {
return -1;
}
}
else {
if (config_dict_get_wstrlist(dict, spec->name, config,
(PyWideStringList*)member) < 0) {
return -1;
}
}
break;
}
@ -3261,3 +3403,505 @@ _Py_DumpPathConfig(PyThreadState *tstate)
_PyErr_SetRaisedException(tstate, exc);
}
// --- PyConfig_Get() -------------------------------------------------------
static void*
config_spec_get_member(const PyConfigSpec *spec, const PyConfig *config)
{
return (char *)config + spec->offset;
}
static const PyConfigSpec*
config_generic_find_spec(const PyConfigSpec *spec, const char *name)
{
for (; spec->name != NULL; spec++) {
if (spec->visibility == PyConfig_MEMBER_INIT_ONLY) {
continue;
}
if (strcmp(name, spec->name) == 0) {
return spec;
}
}
return NULL;
}
static const PyConfigSpec*
config_find_spec(const char *name)
{
return config_generic_find_spec(PYCONFIG_SPEC, name);
}
static const PyConfigSpec*
preconfig_find_spec(const char *name)
{
return config_generic_find_spec(PYPRECONFIG_SPEC, name);
}
static int
config_add_xoption(PyObject *dict, const wchar_t *str)
{
PyObject *name = NULL, *value = NULL;
const wchar_t *name_end = wcschr(str, L'=');
if (!name_end) {
name = PyUnicode_FromWideChar(str, -1);
if (name == NULL) {
goto error;
}
value = Py_NewRef(Py_True);
}
else {
name = PyUnicode_FromWideChar(str, name_end - str);
if (name == NULL) {
goto error;
}
value = PyUnicode_FromWideChar(name_end + 1, -1);
if (value == NULL) {
goto error;
}
}
if (PyDict_SetItem(dict, name, value) < 0) {
goto error;
}
Py_DECREF(name);
Py_DECREF(value);
return 0;
error:
Py_XDECREF(name);
Py_XDECREF(value);
return -1;
}
PyObject*
_PyConfig_CreateXOptionsDict(const PyConfig *config)
{
PyObject *dict = PyDict_New();
if (dict == NULL) {
return NULL;
}
Py_ssize_t nxoption = config->xoptions.length;
wchar_t **xoptions = config->xoptions.items;
for (Py_ssize_t i=0; i < nxoption; i++) {
const wchar_t *option = xoptions[i];
if (config_add_xoption(dict, option) < 0) {
Py_DECREF(dict);
return NULL;
}
}
return dict;
}
static PyObject*
config_get_sys(const char *name)
{
PyObject *value = PySys_GetObject(name);
if (value == NULL) {
PyErr_Format(PyExc_RuntimeError, "lost sys.%s", name);
return NULL;
}
return Py_NewRef(value);
}
static int
config_get_sys_write_bytecode(const PyConfig *config, int *value)
{
PyObject *attr = config_get_sys("dont_write_bytecode");
if (attr == NULL) {
return -1;
}
int is_true = PyObject_IsTrue(attr);
Py_DECREF(attr);
if (is_true < 0) {
return -1;
}
*value = (!is_true);
return 0;
}
static PyObject*
config_get(const PyConfig *config, const PyConfigSpec *spec,
int use_sys)
{
if (use_sys) {
if (spec->sys.attr != NULL) {
return config_get_sys(spec->sys.attr);
}
if (strcmp(spec->name, "write_bytecode") == 0) {
int value;
if (config_get_sys_write_bytecode(config, &value) < 0) {
return NULL;
}
return PyBool_FromLong(value);
}
if (strcmp(spec->name, "int_max_str_digits") == 0) {
PyInterpreterState *interp = _PyInterpreterState_GET();
return PyLong_FromLong(interp->long_state.max_str_digits);
}
}
void *member = config_spec_get_member(spec, config);
switch (spec->type) {
case PyConfig_MEMBER_INT:
case PyConfig_MEMBER_UINT:
{
int value = *(int *)member;
return PyLong_FromLong(value);
}
case PyConfig_MEMBER_BOOL:
{
int value = *(int *)member;
return PyBool_FromLong(value != 0);
}
case PyConfig_MEMBER_ULONG:
{
unsigned long value = *(unsigned long *)member;
return PyLong_FromUnsignedLong(value);
}
case PyConfig_MEMBER_WSTR:
case PyConfig_MEMBER_WSTR_OPT:
{
wchar_t *wstr = *(wchar_t **)member;
if (wstr != NULL) {
return PyUnicode_FromWideChar(wstr, -1);
}
else {
return Py_NewRef(Py_None);
}
}
case PyConfig_MEMBER_WSTR_LIST:
{
if (strcmp(spec->name, "xoptions") == 0) {
return _PyConfig_CreateXOptionsDict(config);
}
else {
const PyWideStringList *list = (const PyWideStringList *)member;
return _PyWideStringList_AsTuple(list);
}
}
default:
Py_UNREACHABLE();
}
}
static PyObject*
preconfig_get(const PyPreConfig *preconfig, const PyConfigSpec *spec)
{
// The type of all PYPRECONFIG_SPEC members is INT or BOOL.
assert(spec->type == PyConfig_MEMBER_INT
|| spec->type == PyConfig_MEMBER_BOOL);
char *member = (char *)preconfig + spec->offset;
int value = *(int *)member;
if (spec->type == PyConfig_MEMBER_BOOL) {
return PyBool_FromLong(value != 0);
}
else {
return PyLong_FromLong(value);
}
}
static void
config_unknown_name_error(const char *name)
{
PyErr_Format(PyExc_ValueError, "unknown config option name: %s", name);
}
PyObject*
PyConfig_Get(const char *name)
{
const PyConfigSpec *spec = config_find_spec(name);
if (spec != NULL) {
const PyConfig *config = _Py_GetConfig();
return config_get(config, spec, 1);
}
spec = preconfig_find_spec(name);
if (spec != NULL) {
const PyPreConfig *preconfig = &_PyRuntime.preconfig;
return preconfig_get(preconfig, spec);
}
config_unknown_name_error(name);
return NULL;
}
int
PyConfig_GetInt(const char *name, int *value)
{
assert(!PyErr_Occurred());
PyObject *obj = PyConfig_Get(name);
if (obj == NULL) {
return -1;
}
if (!PyLong_Check(obj)) {
Py_DECREF(obj);
PyErr_Format(PyExc_TypeError, "config option %s is not an int", name);
return -1;
}
int as_int = PyLong_AsInt(obj);
Py_DECREF(obj);
if (as_int == -1 && PyErr_Occurred()) {
PyErr_Format(PyExc_OverflowError,
"config option %s value does not fit into a C int", name);
return -1;
}
*value = as_int;
return 0;
}
static int
config_names_add(PyObject *names, const PyConfigSpec *spec)
{
for (; spec->name != NULL; spec++) {
if (spec->visibility == PyConfig_MEMBER_INIT_ONLY) {
continue;
}
PyObject *name = PyUnicode_FromString(spec->name);
if (name == NULL) {
return -1;
}
int res = PyList_Append(names, name);
Py_DECREF(name);
if (res < 0) {
return -1;
}
}
return 0;
}
PyObject*
PyConfig_Names(void)
{
PyObject *names = PyList_New(0);
if (names == NULL) {
goto error;
}
if (config_names_add(names, PYCONFIG_SPEC) < 0) {
goto error;
}
if (config_names_add(names, PYPRECONFIG_SPEC) < 0) {
goto error;
}
PyObject *frozen = PyFrozenSet_New(names);
Py_DECREF(names);
return frozen;
error:
Py_XDECREF(names);
return NULL;
}
// --- PyConfig_Set() -------------------------------------------------------
static int
config_set_sys_flag(const PyConfigSpec *spec, int int_value)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
PyConfig *config = &interp->config;
if (spec->type == PyConfig_MEMBER_BOOL) {
if (int_value != 0) {
// convert values < 0 and values > 1 to 1
int_value = 1;
}
}
PyObject *value;
if (spec->sys.flag_setter) {
value = spec->sys.flag_setter(int_value);
}
else {
value = config_sys_flag_long(int_value);
}
if (value == NULL) {
return -1;
}
// Set sys.flags.FLAG
Py_ssize_t pos = spec->sys.flag_index;
if (_PySys_SetFlagObj(pos, value) < 0) {
goto error;
}
// Set PyConfig.ATTR
assert(spec->type == PyConfig_MEMBER_INT
|| spec->type == PyConfig_MEMBER_UINT
|| spec->type == PyConfig_MEMBER_BOOL);
int *member = config_spec_get_member(spec, config);
*member = int_value;
// Set sys.dont_write_bytecode attribute
if (strcmp(spec->name, "write_bytecode") == 0) {
if (PySys_SetObject("dont_write_bytecode", value) < 0) {
goto error;
}
}
Py_DECREF(value);
return 0;
error:
Py_DECREF(value);
return -1;
}
int
PyConfig_Set(const char *name, PyObject *value)
{
const PyConfigSpec *spec = config_find_spec(name);
if (spec == NULL) {
spec = preconfig_find_spec(name);
if (spec == NULL) {
config_unknown_name_error(name);
return -1;
}
assert(spec->visibility != PyConfig_MEMBER_PUBLIC);
}
if (spec->visibility != PyConfig_MEMBER_PUBLIC) {
PyErr_Format(PyExc_ValueError, "cannot set read-only option %s",
name);
return -1;
}
int int_value = 0;
int has_int_value = 0;
switch (spec->type) {
case PyConfig_MEMBER_INT:
case PyConfig_MEMBER_UINT:
case PyConfig_MEMBER_BOOL:
if (!PyLong_Check(value)) {
PyErr_Format(PyExc_TypeError, "expected int or bool, got %T", value);
return -1;
}
int_value = PyLong_AsInt(value);
if (int_value == -1 && PyErr_Occurred()) {
return -1;
}
if (int_value < 0 && spec->type != PyConfig_MEMBER_INT) {
PyErr_Format(PyExc_ValueError, "value must be >= 0");
return -1;
}
has_int_value = 1;
break;
case PyConfig_MEMBER_ULONG:
// not implemented: only hash_seed uses this type, and it's read-only
goto cannot_set;
case PyConfig_MEMBER_WSTR:
if (!PyUnicode_CheckExact(value)) {
PyErr_Format(PyExc_TypeError, "expected str, got %T", value);
return -1;
}
break;
case PyConfig_MEMBER_WSTR_OPT:
if (value != Py_None && !PyUnicode_CheckExact(value)) {
PyErr_Format(PyExc_TypeError, "expected str or None, got %T", value);
return -1;
}
break;
case PyConfig_MEMBER_WSTR_LIST:
if (strcmp(spec->name, "xoptions") != 0) {
if (!PyList_Check(value)) {
PyErr_Format(PyExc_TypeError, "expected list[str], got %T",
value);
return -1;
}
for (Py_ssize_t i=0; i < PyList_GET_SIZE(value); i++) {
PyObject *item = PyList_GET_ITEM(value, i);
if (!PyUnicode_Check(item)) {
PyErr_Format(PyExc_TypeError,
"expected str, list item %zd has type %T",
i, item);
return -1;
}
}
}
else {
// xoptions type is dict[str, str]
if (!PyDict_Check(value)) {
PyErr_Format(PyExc_TypeError,
"expected dict[str, str | bool], got %T",
value);
return -1;
}
Py_ssize_t pos = 0;
PyObject *key, *item;
while (PyDict_Next(value, &pos, &key, &item)) {
if (!PyUnicode_Check(key)) {
PyErr_Format(PyExc_TypeError,
"expected str, "
"got dict key type %T", key);
return -1;
}
if (!PyUnicode_Check(item) && !PyBool_Check(item)) {
PyErr_Format(PyExc_TypeError,
"expected str or bool, "
"got dict value type %T", key);
return -1;
}
}
}
break;
default:
Py_UNREACHABLE();
}
if (spec->sys.attr != NULL) {
// Set the sys attribute, but don't set PyInterpreterState.config
// to keep the code simple.
return PySys_SetObject(spec->sys.attr, value);
}
else if (spec->sys.flag_index >= 0 && has_int_value) {
return config_set_sys_flag(spec, int_value);
}
else if (strcmp(spec->name, "int_max_str_digits") == 0 && has_int_value) {
return _PySys_SetIntMaxStrDigits(int_value);
}
cannot_set:
PyErr_Format(PyExc_ValueError, "cannot set option %s", name);
return -1;
}

144
Python/sysmodule.c
View File

@ -1845,6 +1845,7 @@ sys_get_int_max_str_digits_impl(PyObject *module)
return PyLong_FromLong(interp->long_state.max_str_digits);
}
/*[clinic input]
sys.set_int_max_str_digits
@ -1857,16 +1858,10 @@ static PyObject *
sys_set_int_max_str_digits_impl(PyObject *module, int maxdigits)
/*[clinic end generated code: output=734d4c2511f2a56d input=d7e3f325db6910c5]*/
{
PyThreadState *tstate = _PyThreadState_GET();
if ((!maxdigits) || (maxdigits >= _PY_LONG_MAX_STR_DIGITS_THRESHOLD)) {
tstate->interp->long_state.max_str_digits = maxdigits;
Py_RETURN_NONE;
} else {
PyErr_Format(
PyExc_ValueError, "maxdigits must be 0 or larger than %d",
_PY_LONG_MAX_STR_DIGITS_THRESHOLD);
if (_PySys_SetIntMaxStrDigits(maxdigits) < 0) {
return NULL;
}
Py_RETURN_NONE;
}
size_t
@ -3120,6 +3115,8 @@ static PyStructSequence_Field flags_fields[] = {
{0}
};
#define SYS_FLAGS_INT_MAX_STR_DIGITS 17
static PyStructSequence_Desc flags_desc = {
"sys.flags", /* name */
flags__doc__, /* doc */
@ -3127,6 +3124,48 @@ static PyStructSequence_Desc flags_desc = {
18
};
static void
sys_set_flag(PyObject *flags, Py_ssize_t pos, PyObject *value)
{
assert(pos >= 0 && pos < (Py_ssize_t)(Py_ARRAY_LENGTH(flags_fields) - 1));
PyObject *old_value = PyStructSequence_GET_ITEM(flags, pos);
PyStructSequence_SET_ITEM(flags, pos, Py_NewRef(value));
Py_XDECREF(old_value);
}
int
_PySys_SetFlagObj(Py_ssize_t pos, PyObject *value)
{
PyObject *flags = Py_XNewRef(PySys_GetObject("flags"));
if (flags == NULL) {
if (!PyErr_Occurred()) {
PyErr_SetString(PyExc_RuntimeError, "lost sys.flags");
}
return -1;
}
sys_set_flag(flags, pos, value);
Py_DECREF(flags);
return 0;
}
static int
_PySys_SetFlagInt(Py_ssize_t pos, int value)
{
PyObject *obj = PyLong_FromLong(value);
if (obj == NULL) {
return -1;
}
int res = _PySys_SetFlagObj(pos, obj);
Py_DECREF(obj);
return res;
}
static int
set_flags_from_config(PyInterpreterState *interp, PyObject *flags)
{
@ -3142,8 +3181,8 @@ set_flags_from_config(PyInterpreterState *interp, PyObject *flags)
if (value == NULL) { \
return -1; \
} \
Py_XDECREF(PyStructSequence_GET_ITEM(flags, pos)); \
PyStructSequence_SET_ITEM(flags, pos, value); \
sys_set_flag(flags, pos, value); \
Py_DECREF(value); \
pos++; \
} while (0)
#define SetFlag(expr) SetFlagObj(PyLong_FromLong(expr))
@ -3599,64 +3638,6 @@ err_occurred:
return _PyStatus_ERR("can't initialize sys module");
}
static int
sys_add_xoption(PyObject *opts, const wchar_t *s)
{
PyObject *name, *value = NULL;
const wchar_t *name_end = wcschr(s, L'=');
if (!name_end) {
name = PyUnicode_FromWideChar(s, -1);
if (name == NULL) {
goto error;
}
value = Py_NewRef(Py_True);
}
else {
name = PyUnicode_FromWideChar(s, name_end - s);
if (name == NULL) {
goto error;
}
value = PyUnicode_FromWideChar(name_end + 1, -1);
if (value == NULL) {
goto error;
}
}
if (PyDict_SetItem(opts, name, value) < 0) {
goto error;
}
Py_DECREF(name);
Py_DECREF(value);
return 0;
error:
Py_XDECREF(name);
Py_XDECREF(value);
return -1;
}
static PyObject*
sys_create_xoptions_dict(const PyConfig *config)
{
Py_ssize_t nxoption = config->xoptions.length;
wchar_t * const * xoptions = config->xoptions.items;
PyObject *dict = PyDict_New();
if (dict == NULL) {
return NULL;
}
for (Py_ssize_t i=0; i < nxoption; i++) {
const wchar_t *option = xoptions[i];
if (sys_add_xoption(dict, option) < 0) {
Py_DECREF(dict);
return NULL;
}
}
return dict;
}
// Update sys attributes for a new PyConfig configuration.
// This function also adds attributes that _PySys_InitCore() didn't add.
@ -3703,7 +3684,7 @@ _PySys_UpdateConfig(PyThreadState *tstate)
COPY_LIST("orig_argv", config->orig_argv);
COPY_LIST("warnoptions", config->warnoptions);
SET_SYS("_xoptions", sys_create_xoptions_dict(config));
SET_SYS("_xoptions", _PyConfig_CreateXOptionsDict(config));
const wchar_t *stdlibdir = _Py_GetStdlibDir();
if (stdlibdir != NULL) {
@ -4129,3 +4110,28 @@ PySys_FormatStderr(const char *format, ...)
sys_format(&_Py_ID(stderr), stderr, format, va);
va_end(va);
}
int
_PySys_SetIntMaxStrDigits(int maxdigits)
{
if (maxdigits != 0 && maxdigits < _PY_LONG_MAX_STR_DIGITS_THRESHOLD) {
PyErr_Format(
PyExc_ValueError, "maxdigits must be 0 or larger than %d",
_PY_LONG_MAX_STR_DIGITS_THRESHOLD);
return -1;
}
// Set sys.flags.int_max_str_digits
const Py_ssize_t pos = SYS_FLAGS_INT_MAX_STR_DIGITS;
if (_PySys_SetFlagInt(pos, maxdigits) < 0) {
return -1;
}
// Set PyInterpreterState.long_state.max_str_digits
// and PyInterpreterState.config.int_max_str_digits.
PyInterpreterState *interp = _PyInterpreterState_GET();
interp->long_state.max_str_digits = maxdigits;
interp->config.int_max_str_digits = maxdigits;
return 0;
}

1
Tools/c-analyzer/cpython/_parser.py
View File

@ -329,6 +329,7 @@ MAX_SIZES = {
_abs('Python/parking_lot.c'): (40_000, 1000),
_abs('Python/pylifecycle.c'): (500_000, 5000),
_abs('Python/pystate.c'): (500_000, 5000),
_abs('Python/initconfig.c'): (50_000, 500),
# Generated files:
_abs('Include/internal/pycore_opcode.h'): (10_000, 1000),

1
Tools/c-analyzer/cpython/ignored.tsv
View File

@ -90,6 +90,7 @@ Python/initconfig.c - _Py_StandardStreamErrors -
# Internal constant list
Python/initconfig.c - PYCONFIG_SPEC -
Python/initconfig.c - PYPRECONFIG_SPEC -
##-----------------------

Can't render this file because it has a wrong number of fields in line 4.