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bpo-38304: Add PyConfig.struct_size (GH-16451)

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Add a new struct_size field to PyPreConfig and PyConfig structures to
allow to modify these structures in the future without breaking the
backward compatibility.

* Replace private _config_version field with public struct_size field
  in PyPreConfig and PyConfig.
* Public PyPreConfig_InitIsolatedConfig() and
  PyPreConfig_InitPythonConfig()
  return type becomes PyStatus, instead of void.
* Internal _PyConfig_InitCompatConfig(),
  _PyPreConfig_InitCompatConfig(), _PyPreConfig_InitFromConfig(),
  _PyPreConfig_InitFromPreConfig() return type becomes PyStatus,
  instead of void.
* Remove _Py_CONFIG_VERSION
* Update the Initialization Configuration documentation.
This commit is contained in:
Victor Stinner 2019-09-28 04:28:35 +02:00 committed by GitHub
parent 52d1b86bde
commit 441b10cf28
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
13 changed files with 350 additions and 60 deletions
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44
Doc/c-api/init_config.rst
View File

@ -194,18 +194,25 @@ PyPreConfig
* Configure the LC_CTYPE locale
* Set the UTF-8 mode
The :c:member:`struct_size` field must be explicitly initialized to
``sizeof(PyPreConfig)``.
Function to initialize a preconfiguration:
.. c:function:: void PyPreConfig_InitIsolatedConfig(PyPreConfig *preconfig)
.. c:function:: PyStatus PyPreConfig_InitIsolatedConfig(PyPreConfig *preconfig)
Initialize the preconfiguration with :ref:`Python Configuration
<init-python-config>`.
.. c:function:: void PyPreConfig_InitPythonConfig(PyPreConfig *preconfig)
.. c:function:: PyStatus PyPreConfig_InitPythonConfig(PyPreConfig *preconfig)
Initialize the preconfiguration with :ref:`Isolated Configuration
<init-isolated-conf>`.
The caller of these functions is responsible to handle exceptions (error or
exit) using :c:func:`PyStatus_Exception` and
:c:func:`Py_ExitStatusException`.
Structure fields:
.. c:member:: int allocator
@ -267,6 +274,13 @@ PyPreConfig
same way the regular Python parses command line arguments: see
:ref:`Command Line Arguments <using-on-cmdline>`.
.. c:member:: size_t struct_size
Size of the structure in bytes: must be initialized to
``sizeof(PyPreConfig)``.
Field used for API and ABI compatibility.
.. c:member:: int use_environment
See :c:member:`PyConfig.use_environment`.
@ -316,12 +330,18 @@ the preinitialization.
Example using the preinitialization to enable the UTF-8 Mode::
PyStatus status;
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitPythonConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
preconfig.utf8_mode = 1;
PyStatus status = Py_PreInitialize(&preconfig);
status = Py_PreInitialize(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
@ -340,6 +360,9 @@ PyConfig
Structure containing most parameters to configure Python.
The :c:member:`struct_size` field must be explicitly initialized to
``sizeof(PyConfig)``.
Structure methods:
.. c:function:: PyStatus PyConfig_InitPythonConfig(PyConfig *config)
@ -656,6 +679,13 @@ PyConfig
Encoding and encoding errors of :data:`sys.stdin`, :data:`sys.stdout` and
:data:`sys.stderr`.
.. c:member:: size_t struct_size
Size of the structure in bytes: must be initialized to
``sizeof(PyConfig)``.
Field used for API and ABI compatibility.
.. c:member:: int tracemalloc
If non-zero, call :func:`tracemalloc.start` at startup.
@ -718,6 +748,7 @@ Example setting the program name::
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -750,6 +781,7 @@ configuration, and then override some parameters::
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -835,8 +867,9 @@ Example of customized Python always running in isolated mode::
int main(int argc, char **argv)
{
PyConfig config;
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -1028,6 +1061,7 @@ phases::
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {

17
Include/cpython/initconfig.h
View File

@ -45,8 +45,10 @@ PyAPI_FUNC(PyStatus) PyWideStringList_Insert(PyWideStringList *list,
/* --- PyPreConfig ----------------------------------------------- */
typedef struct {
int _config_version; /* Internal configuration version,
used for ABI compatibility */
/* Size of the structure in bytes: must be initialized to
sizeof(PyPreConfig). Field used for API and ABI compatibility. */
size_t struct_size;
int _config_init; /* _PyConfigInitEnum value */
/* Parse Py_PreInitializeFromBytesArgs() arguments?
@ -122,15 +124,17 @@ typedef struct {
int allocator;
} PyPreConfig;
PyAPI_FUNC(void) PyPreConfig_InitPythonConfig(PyPreConfig *config);
PyAPI_FUNC(void) PyPreConfig_InitIsolatedConfig(PyPreConfig *config);
PyAPI_FUNC(PyStatus) PyPreConfig_InitPythonConfig(PyPreConfig *config);
PyAPI_FUNC(PyStatus) PyPreConfig_InitIsolatedConfig(PyPreConfig *config);
/* --- PyConfig ---------------------------------------------- */
typedef struct {
int _config_version; /* Internal configuration version,
used for ABI compatibility */
/* Size of the structure in bytes: must be initialized to
sizeof(PyConfig). Field used for API and ABI compatibility. */
size_t struct_size;
int _config_init; /* _PyConfigInitEnum value */
int isolated; /* Isolated mode? see PyPreConfig.isolated */
@ -403,7 +407,6 @@ typedef struct {
/* If equal to 0, stop Python initialization before the "main" phase */
int _init_main;
} PyConfig;
PyAPI_FUNC(PyStatus) PyConfig_InitPythonConfig(PyConfig *config);

12
Include/internal/pycore_initconfig.h
View File

@ -40,6 +40,8 @@ extern "C" {
(err._type == _PyStatus_TYPE_EXIT)
#define _PyStatus_EXCEPTION(err) \
(err._type != _PyStatus_TYPE_OK)
#define _PyStatus_UPDATE_FUNC(err) \
do { err.func = _PyStatus_GET_FUNC(); } while (0)
/* --- PyWideStringList ------------------------------------------------ */
@ -118,11 +120,11 @@ extern PyStatus _PyPreCmdline_Read(_PyPreCmdline *cmdline,
/* --- PyPreConfig ----------------------------------------------- */
PyAPI_FUNC(void) _PyPreConfig_InitCompatConfig(PyPreConfig *preconfig);
extern void _PyPreConfig_InitFromConfig(
PyAPI_FUNC(PyStatus) _PyPreConfig_InitCompatConfig(PyPreConfig *preconfig);
extern PyStatus _PyPreConfig_InitFromConfig(
PyPreConfig *preconfig,
const PyConfig *config);
extern void _PyPreConfig_InitFromPreConfig(
extern PyStatus _PyPreConfig_InitFromPreConfig(
PyPreConfig *preconfig,
const PyPreConfig *config2);
extern PyObject* _PyPreConfig_AsDict(const PyPreConfig *preconfig);
@ -135,8 +137,6 @@ extern PyStatus _PyPreConfig_Write(const PyPreConfig *preconfig);
/* --- PyConfig ---------------------------------------------- */
#define _Py_CONFIG_VERSION 1
typedef enum {
/* Py_Initialize() API: backward compatibility with Python 3.6 and 3.7 */
_PyConfig_INIT_COMPAT = 1,
@ -144,7 +144,7 @@ typedef enum {
_PyConfig_INIT_ISOLATED = 3
} _PyConfigInitEnum;
PyAPI_FUNC(void) _PyConfig_InitCompatConfig(PyConfig *config);
PyAPI_FUNC(PyStatus) _PyConfig_InitCompatConfig(PyConfig *config);
extern PyStatus _PyConfig_Copy(
PyConfig *config,
const PyConfig *config2);

3
Misc/NEWS.d/next/C API/2019-09-28-03-43-27.bpo-38304.RqHAwd.rst Normal file
View File

@ -0,0 +1,3 @@
Add a new ``struct_size`` field to :c:type:`PyPreConfig` and :c:type:`PyConfig`
structures to allow to modify these structures in the future without breaking
the backward compatibility.

9
Modules/main.c
View File

@ -53,13 +53,20 @@ pymain_init(const _PyArgv *args)
#endif
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitPythonConfig(&preconfig);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _Py_PreInitializeFromPyArgv(&preconfig, args);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (_PyStatus_EXCEPTION(status)) {
goto done;

1
Programs/_freeze_importlib.c
View File

@ -78,6 +78,7 @@ main(int argc, char *argv[])
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitIsolatedConfig(&config);
if (PyStatus_Exception(status)) {

121
Programs/_testembed.c
View File

@ -385,7 +385,12 @@ static int check_init_compat_config(int preinit)
if (preinit) {
PyPreConfig preconfig;
_PyPreConfig_InitCompatConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitCompatConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
status = Py_PreInitialize(&preconfig);
if (PyStatus_Exception(status)) {
@ -394,7 +399,13 @@ static int check_init_compat_config(int preinit)
}
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
config_set_program_name(&config);
init_from_config_clear(&config);
@ -470,7 +481,12 @@ static int test_init_from_config(void)
PyStatus status;
PyPreConfig preconfig;
_PyPreConfig_InitCompatConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitCompatConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
putenv("PYTHONMALLOC=malloc_debug");
preconfig.allocator = PYMEM_ALLOCATOR_MALLOC;
@ -485,7 +501,12 @@ static int test_init_from_config(void)
}
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
config.install_signal_handlers = 0;
/* FIXME: test use_environment */
@ -617,6 +638,8 @@ static int check_init_parse_argv(int parse_argv)
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -702,6 +725,8 @@ static int test_init_python_env(void)
set_all_env_vars();
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -755,6 +780,8 @@ static int test_init_isolated_flag(void)
/* Test PyConfig.isolated=1 */
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -779,7 +806,13 @@ static int test_preinit_isolated1(void)
PyStatus status;
PyPreConfig preconfig;
_PyPreConfig_InitCompatConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitCompatConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
preconfig.isolated = 1;
status = Py_PreInitialize(&preconfig);
@ -788,7 +821,12 @@ static int test_preinit_isolated1(void)
}
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
config_set_program_name(&config);
set_all_env_vars();
init_from_config_clear(&config);
@ -805,7 +843,13 @@ static int test_preinit_isolated2(void)
PyStatus status;
PyPreConfig preconfig;
_PyPreConfig_InitCompatConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitCompatConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
preconfig.isolated = 0;
status = Py_PreInitialize(&preconfig);
@ -815,7 +859,11 @@ static int test_preinit_isolated2(void)
/* Test PyConfig.isolated=1 */
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
Py_IsolatedFlag = 0;
config.isolated = 1;
@ -835,7 +883,12 @@ static int test_preinit_dont_parse_argv(void)
PyStatus status;
PyPreConfig preconfig;
PyPreConfig_InitIsolatedConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitIsolatedConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
preconfig.isolated = 0;
@ -852,6 +905,7 @@ static int test_preinit_dont_parse_argv(void)
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitIsolatedConfig(&config);
if (PyStatus_Exception(status)) {
@ -877,6 +931,7 @@ static int test_preinit_parse_argv(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -934,7 +989,12 @@ static int check_preinit_isolated_config(int preinit)
if (preinit) {
PyPreConfig preconfig;
PyPreConfig_InitIsolatedConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitIsolatedConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
status = Py_PreInitialize(&preconfig);
if (PyStatus_Exception(status)) {
@ -947,6 +1007,8 @@ static int check_preinit_isolated_config(int preinit)
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitIsolatedConfig(&config);
if (PyStatus_Exception(status)) {
PyConfig_Clear(&config);
@ -996,7 +1058,12 @@ static int check_init_python_config(int preinit)
if (preinit) {
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitPythonConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
status = Py_PreInitialize(&preconfig);
if (PyStatus_Exception(status)) {
@ -1005,6 +1072,8 @@ static int check_init_python_config(int preinit)
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1035,7 +1104,13 @@ static int test_init_dont_configure_locale(void)
PyStatus status;
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitPythonConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
preconfig.configure_locale = 0;
preconfig.coerce_c_locale = 1;
preconfig.coerce_c_locale_warn = 1;
@ -1046,6 +1121,8 @@ static int test_init_dont_configure_locale(void)
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1063,6 +1140,8 @@ static int test_init_dev_mode(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1286,6 +1365,8 @@ static int run_audit_run_test(int argc, wchar_t **argv, void *test)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1334,6 +1415,8 @@ static int test_init_read_set(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1382,6 +1465,8 @@ static int test_init_sys_add(void)
PySys_AddWarnOption(L"ignore:::sysadd_warnoption");
PyConfig config;
config.struct_size = sizeof(PyConfig);
PyStatus status;
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -1450,7 +1535,12 @@ static int test_init_setpath_config(void)
{
PyStatus status;
PyPreConfig preconfig;
PyPreConfig_InitPythonConfig(&preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = PyPreConfig_InitPythonConfig(&preconfig);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
/* Explicitly preinitializes with Python preconfiguration to avoid
Py_SetPath() implicit preinitialization with compat preconfiguration. */
@ -1474,6 +1564,7 @@ static int test_init_setpath_config(void)
putenv("TESTPATH=");
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -1531,6 +1622,8 @@ static int test_init_run_main(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
@ -1546,6 +1639,7 @@ static int test_init_main(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
@ -1577,6 +1671,7 @@ static int test_run_main(void)
{
PyStatus status;
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {

1
Python/frozenmain.c
View File

@ -40,6 +40,7 @@ Py_FrozenMain(int argc, char **argv)
}
PyConfig config;
config.struct_size = sizeof(PyConfig);
status = PyConfig_InitPythonConfig(&config);
if (PyStatus_Exception(status)) {
PyConfig_Clear(&config);

70
Python/initconfig.c
View File

@ -528,6 +528,18 @@ Py_GetArgcArgv(int *argc, wchar_t ***argv)
? _PyStatus_ERR("cannot decode " NAME) \
: _PyStatus_NO_MEMORY())
static PyStatus
config_check_struct_size(const PyConfig *config)
{
if (config->struct_size != sizeof(PyConfig)) {
return _PyStatus_ERR("unsupported PyConfig structure size "
"(Python version mismatch?)");
}
return _PyStatus_OK();
}
/* Free memory allocated in config, but don't clear all attributes */
void
PyConfig_Clear(PyConfig *config)
@ -568,12 +580,19 @@ PyConfig_Clear(PyConfig *config)
}
void
PyStatus
_PyConfig_InitCompatConfig(PyConfig *config)
{
size_t struct_size = config->struct_size;
memset(config, 0, sizeof(*config));
config->struct_size = struct_size;
PyStatus status = config_check_struct_size(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_version = _Py_CONFIG_VERSION;
config->_config_init = (int)_PyConfig_INIT_COMPAT;
config->isolated = -1;
config->use_environment = -1;
@ -603,13 +622,17 @@ _PyConfig_InitCompatConfig(PyConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_stdio = -1;
#endif
return _PyStatus_OK();
}
static void
static PyStatus
config_init_defaults(PyConfig *config)
{
_PyConfig_InitCompatConfig(config);
PyStatus status = _PyConfig_InitCompatConfig(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
config->isolated = 0;
config->use_environment = 1;
@ -628,13 +651,18 @@ config_init_defaults(PyConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_stdio = 0;
#endif
return _PyStatus_OK();
}
PyStatus
PyConfig_InitPythonConfig(PyConfig *config)
{
config_init_defaults(config);
PyStatus status = config_init_defaults(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_init = (int)_PyConfig_INIT_PYTHON;
config->configure_c_stdio = 1;
@ -647,7 +675,11 @@ PyConfig_InitPythonConfig(PyConfig *config)
PyStatus
PyConfig_InitIsolatedConfig(PyConfig *config)
{
config_init_defaults(config);
PyStatus status = config_init_defaults(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_init = (int)_PyConfig_INIT_ISOLATED;
config->isolated = 1;
@ -742,6 +774,19 @@ PyStatus
_PyConfig_Copy(PyConfig *config, const PyConfig *config2)
{
PyStatus status;
status = config_check_struct_size(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
status = config_check_struct_size(config2);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
PyConfig_Clear(config);
#define COPY_ATTR(ATTR) config->ATTR = config2->ATTR
@ -2204,7 +2249,12 @@ core_read_precmdline(PyConfig *config, _PyPreCmdline *precmdline)
}
PyPreConfig preconfig;
_PyPreConfig_InitFromPreConfig(&preconfig, &_PyRuntime.preconfig);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitFromPreConfig(&preconfig, &_PyRuntime.preconfig);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
_PyPreConfig_GetConfig(&preconfig, config);
@ -2385,6 +2435,12 @@ PyConfig_Read(PyConfig *config)
PyStatus status;
PyWideStringList orig_argv = PyWideStringList_INIT;
status = config_check_struct_size(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
status = _Py_PreInitializeFromConfig(config, NULL);
if (_PyStatus_EXCEPTION(status)) {
return status;

7
Python/pathconfig.c
View File

@ -434,7 +434,12 @@ pathconfig_global_read(_PyPathConfig *pathconfig)
{
PyStatus status;
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
/* Call _PyConfig_InitPathConfig() */
status = PyConfig_Read(&config);

88
Python/preconfig.c
View File

@ -269,12 +269,30 @@ _PyPreCmdline_Read(_PyPreCmdline *cmdline, const PyPreConfig *preconfig)
/* --- PyPreConfig ----------------------------------------------- */
void
static PyStatus
preconfig_check_struct_size(PyPreConfig *config)
{
if (config->struct_size != sizeof(PyPreConfig)) {
return _PyStatus_ERR("unsupported PyPreConfig structure size "
"(Python version mismatch?)");
}
return _PyStatus_OK();
}
PyStatus
_PyPreConfig_InitCompatConfig(PyPreConfig *config)
{
size_t struct_size = config->struct_size;
memset(config, 0, sizeof(*config));
config->struct_size = struct_size;
PyStatus status = preconfig_check_struct_size(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_version = _Py_CONFIG_VERSION;
config->_config_init = (int)_PyConfig_INIT_COMPAT;
config->parse_argv = 0;
config->isolated = -1;
@ -295,13 +313,18 @@ _PyPreConfig_InitCompatConfig(PyPreConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_fs_encoding = -1;
#endif
return _PyStatus_OK();
}
void
PyStatus
PyPreConfig_InitPythonConfig(PyPreConfig *config)
{
_PyPreConfig_InitCompatConfig(config);
PyStatus status = _PyPreConfig_InitCompatConfig(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_init = (int)_PyConfig_INIT_PYTHON;
config->isolated = 0;
@ -316,13 +339,18 @@ PyPreConfig_InitPythonConfig(PyPreConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_fs_encoding = 0;
#endif
return _PyStatus_OK();
}
void
PyStatus
PyPreConfig_InitIsolatedConfig(PyPreConfig *config)
{
_PyPreConfig_InitCompatConfig(config);
PyStatus status = _PyPreConfig_InitCompatConfig(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
config->_config_init = (int)_PyConfig_INIT_ISOLATED;
config->configure_locale = 0;
@ -333,41 +361,55 @@ PyPreConfig_InitIsolatedConfig(PyPreConfig *config)
#ifdef MS_WINDOWS
config->legacy_windows_fs_encoding = 0;
#endif
return _PyStatus_OK();
}
void
PyStatus
_PyPreConfig_InitFromPreConfig(PyPreConfig *config,
const PyPreConfig *config2)
{
PyPreConfig_InitPythonConfig(config);
PyStatus status = PyPreConfig_InitPythonConfig(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
preconfig_copy(config, config2);
return _PyStatus_OK();
}
void
PyStatus
_PyPreConfig_InitFromConfig(PyPreConfig *preconfig, const PyConfig *config)
{
PyStatus status;
_PyConfigInitEnum config_init = (_PyConfigInitEnum)config->_config_init;
switch (config_init) {
case _PyConfig_INIT_PYTHON:
PyPreConfig_InitPythonConfig(preconfig);
status = PyPreConfig_InitPythonConfig(preconfig);
break;
case _PyConfig_INIT_ISOLATED:
PyPreConfig_InitIsolatedConfig(preconfig);
status = PyPreConfig_InitIsolatedConfig(preconfig);
break;
case _PyConfig_INIT_COMPAT:
default:
_PyPreConfig_InitCompatConfig(preconfig);
status = _PyPreConfig_InitCompatConfig(preconfig);
}
if (_PyStatus_EXCEPTION(status)) {
return status;
}
_PyPreConfig_GetConfig(preconfig, config);
return _PyStatus_OK();
}
static void
preconfig_copy(PyPreConfig *config, const PyPreConfig *config2)
{
assert(config2->_config_version == _Py_CONFIG_VERSION);
assert(config->struct_size == sizeof(PyPreConfig));
#define COPY_ATTR(ATTR) config->ATTR = config2->ATTR
COPY_ATTR(_config_init);
@ -787,6 +829,12 @@ _PyPreConfig_Read(PyPreConfig *config, const _PyArgv *args)
return status;
}
status = preconfig_check_struct_size(config);
if (_PyStatus_EXCEPTION(status)) {
_PyStatus_UPDATE_FUNC(status);
return status;
}
preconfig_get_global_vars(config);
/* Copy LC_CTYPE locale, since it's modified later */
@ -801,7 +849,12 @@ _PyPreConfig_Read(PyPreConfig *config, const _PyArgv *args)
/* Save the config to be able to restore it if encodings change */
PyPreConfig save_config;
_PyPreConfig_InitFromPreConfig(&save_config, config);
save_config.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitFromPreConfig(&save_config, config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
/* Set LC_CTYPE to the user preferred locale */
if (config->configure_locale) {
@ -923,7 +976,12 @@ PyStatus
_PyPreConfig_Write(const PyPreConfig *src_config)
{
PyPreConfig config;
_PyPreConfig_InitFromPreConfig(&config, src_config);
config.struct_size = sizeof(PyPreConfig);
PyStatus status = _PyPreConfig_InitFromPreConfig(&config, src_config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
if (_PyRuntime.core_initialized) {
/* bpo-34008: Calling this functions after Py_Initialize() ignores

29
Python/pylifecycle.c
View File

@ -735,7 +735,12 @@ _Py_PreInitializeFromPyArgv(const PyPreConfig *src_config, const _PyArgv *args)
runtime->preinitializing = 1;
PyPreConfig config;
_PyPreConfig_InitFromPreConfig(&config, src_config);
config.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitFromPreConfig(&config, src_config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyPreConfig_Read(&config, args);
if (_PyStatus_EXCEPTION(status)) {
@ -794,7 +799,12 @@ _Py_PreInitializeFromConfig(const PyConfig *config,
}
PyPreConfig preconfig;
_PyPreConfig_InitFromConfig(&preconfig, config);
preconfig.struct_size = sizeof(PyPreConfig);
status = _PyPreConfig_InitFromConfig(&preconfig, config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
if (!config->parse_argv) {
return Py_PreInitialize(&preconfig);
@ -842,7 +852,12 @@ pyinit_core(_PyRuntimeState *runtime,
}
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
status = _PyConfig_Copy(&config, src_config);
if (_PyStatus_EXCEPTION(status)) {
@ -1064,7 +1079,13 @@ Py_InitializeEx(int install_sigs)
}
PyConfig config;
_PyConfig_InitCompatConfig(&config);
config.struct_size = sizeof(PyConfig);
status = _PyConfig_InitCompatConfig(&config);
if (_PyStatus_EXCEPTION(status)) {
Py_ExitStatusException(status);
}
config.install_signal_handlers = install_sigs;
status = Py_InitializeFromConfig(&config);

8
Python/pystate.c
View File

@ -60,7 +60,12 @@ _PyRuntimeState_Init_impl(_PyRuntimeState *runtime)
_PyGC_Initialize(&runtime->gc);
_PyEval_Initialize(&runtime->ceval);
PyPreConfig_InitPythonConfig(&runtime->preconfig);
runtime->preconfig.struct_size = sizeof(PyPreConfig);
PyStatus status = PyPreConfig_InitPythonConfig(&runtime->preconfig);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
runtime->gilstate.check_enabled = 1;
@ -204,6 +209,7 @@ PyInterpreterState_New(void)
memset(interp, 0, sizeof(*interp));
interp->id_refcount = -1;
interp->config.struct_size = sizeof(PyConfig);
PyStatus status = PyConfig_InitPythonConfig(&interp->config);
if (_PyStatus_EXCEPTION(status)) {
/* Don't report status to caller: PyConfig_InitPythonConfig()