cpython/Python/pylifecycle.c at master · python-emscripten/cpython · GitHub

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/* Python interpreter top-level routines, including init/exit */

#include "Python.h"

#include "Python-ast.h"

#undef Yield /* undefine macro conflicting with <winbase.h> */

#include "pycore_ceval.h" // _PyEval_FiniGIL()

#include "pycore_context.h" // _PyContext_Init()

#include "pycore_fileutils.h" // _Py_ResetForceASCII()

#include "pycore_import.h" // _PyImport_Cleanup()

#include "pycore_initconfig.h" // _PyStatus_OK()

#include "pycore_object.h" // _PyDebug_PrintTotalRefs()

#include "pycore_pathconfig.h" // _PyConfig_WritePathConfig()

#include "pycore_pyerrors.h" // _PyErr_Occurred()

#include "pycore_pylifecycle.h" // _PyErr_Print()

#include "pycore_pystate.h" // _PyThreadState_GET()

#include "pycore_sysmodule.h" // _PySys_ClearAuditHooks()

#include "pycore_traceback.h" // _Py_DumpTracebackThreads()

#include <locale.h> // setlocale()

#ifdef HAVE_SIGNAL_H

# include <signal.h> // SIG_IGN

#endif

#ifdef HAVE_LANGINFO_H

# include <langinfo.h> // nl_langinfo(CODESET)

#endif

#ifdef MS_WINDOWS

# undef BYTE

# include "windows.h"

extern PyTypeObject PyWindowsConsoleIO_Type;

# define PyWindowsConsoleIO_Check(op) \

(PyObject_TypeCheck((op), &PyWindowsConsoleIO_Type))

#endif

_Py_IDENTIFIER(flush);

_Py_IDENTIFIER(name);

_Py_IDENTIFIER(stdin);

_Py_IDENTIFIER(stdout);

_Py_IDENTIFIER(stderr);

_Py_IDENTIFIER(threading);

#ifdef __cplusplus

extern "C" {

#endif

/* Forward declarations */

static PyStatus add_main_module(PyInterpreterState *interp);

static PyStatus init_import_site(void);

static PyStatus init_set_builtins_open(void);

static PyStatus init_sys_streams(PyThreadState *tstate);

static PyStatus init_signals(PyThreadState *tstate);

static void call_py_exitfuncs(PyThreadState *tstate);

static void wait_for_thread_shutdown(PyThreadState *tstate);

static void call_ll_exitfuncs(_PyRuntimeState *runtime);

int _Py_UnhandledKeyboardInterrupt = 0;

_PyRuntimeState _PyRuntime = _PyRuntimeState_INIT;

static int runtime_initialized = 0;

PyStatus

_PyRuntime_Initialize(void)

{

/* XXX We only initialize once in the process, which aligns with

the static initialization of the former globals now found in

_PyRuntime. However, _PyRuntime *should* be initialized with

every Py_Initialize() call, but doing so breaks the runtime.

This is because the runtime state is not properly finalized

currently. */

if (runtime_initialized) {

return _PyStatus_OK();

}

runtime_initialized = 1;

return _PyRuntimeState_Init(&_PyRuntime);

}

void

_PyRuntime_Finalize(void)

{

_PyRuntimeState_Fini(&_PyRuntime);

runtime_initialized = 0;

}

int

_Py_IsFinalizing(void)

{

return _PyRuntimeState_GetFinalizing(&_PyRuntime) != NULL;

}

/* Hack to force loading of object files */

int (*_PyOS_mystrnicmp_hack)(const char *, const char *, Py_ssize_t) = \

PyOS_mystrnicmp; /* Python/pystrcmp.o */

/* PyModule_GetWarningsModule is no longer necessary as of 2.6

since _warnings is builtin. This API should not be used. */

PyObject *

PyModule_GetWarningsModule(void)

{

return PyImport_ImportModule("warnings");

}

/* APIs to access the initialization flags

* Can be called prior to Py_Initialize.

int

_Py_IsCoreInitialized(void)

{

return _PyRuntime.core_initialized;

}

int

Py_IsInitialized(void)

{

return _PyRuntime.initialized;

}

/* Global initializations. Can be undone by Py_FinalizeEx(). Don't

call this twice without an intervening Py_FinalizeEx() call. When

initializations fail, a fatal error is issued and the function does

not return. On return, the first thread and interpreter state have

been created.

Locking: you must hold the interpreter lock while calling this.

(If the lock has not yet been initialized, that's equivalent to

having the lock, but you cannot use multiple threads.)

static PyStatus

init_importlib(PyThreadState *tstate, PyObject *sysmod)

{

PyObject *importlib;

PyObject *impmod;

PyObject *value;

PyInterpreterState *interp = tstate->interp;

int verbose = _PyInterpreterState_GetConfig(interp)->verbose;

/* Import _importlib through its frozen version, _frozen_importlib. */

if (PyImport_ImportFrozenModule("_frozen_importlib") <= 0) {

return _PyStatus_ERR("can't import _frozen_importlib");

}

else if (verbose) {

PySys_FormatStderr("import _frozen_importlib # frozen\n");

}

importlib = PyImport_AddModule("_frozen_importlib");

if (importlib == NULL) {

return _PyStatus_ERR("couldn't get _frozen_importlib from sys.modules");

}

interp->importlib = importlib;

Py_INCREF(interp->importlib);

interp->import_func = PyDict_GetItemString(interp->builtins, "__import__");

if (interp->import_func == NULL)

return _PyStatus_ERR("__import__ not found");

Py_INCREF(interp->import_func);

/* Import the _imp module */

impmod = PyInit__imp();

if (impmod == NULL) {

return _PyStatus_ERR("can't import _imp");

}

else if (verbose) {

PySys_FormatStderr("import _imp # builtin\n");

}

if (_PyImport_SetModuleString("_imp", impmod) < 0) {

return _PyStatus_ERR("can't save _imp to sys.modules");

}

/* Install importlib as the implementation of import */

value = PyObject_CallMethod(importlib, "_install", "OO", sysmod, impmod);

if (value == NULL) {

_PyErr_Print(tstate);

return _PyStatus_ERR("importlib install failed");

}

Py_DECREF(value);

Py_DECREF(impmod);

return _PyStatus_OK();

}

static PyStatus

init_importlib_external(PyThreadState *tstate)

{

PyObject *value;

value = PyObject_CallMethod(tstate->interp->importlib,

"_install_external_importers", "");

if (value == NULL) {

_PyErr_Print(tstate);

return _PyStatus_ERR("external importer setup failed");

}

Py_DECREF(value);

return _PyImportZip_Init(tstate);

}

/* Helper functions to better handle the legacy C locale

* The legacy C locale assumes ASCII as the default text encoding, which

* causes problems not only for the CPython runtime, but also other

* components like GNU readline.

* Accordingly, when the CLI detects it, it attempts to coerce it to a

* more capable UTF-8 based alternative as follows:

* if (_Py_LegacyLocaleDetected()) {

* _Py_CoerceLegacyLocale();

* }

* See the documentation of the PYTHONCOERCECLOCALE setting for more details.

* Locale coercion also impacts the default error handler for the standard

* streams: while the usual default is "strict", the default for the legacy

* C locale and for any of the coercion target locales is "surrogateescape".

int

_Py_LegacyLocaleDetected(int warn)

{

#ifndef MS_WINDOWS

if (!warn) {

const char *locale_override = getenv("LC_ALL");

if (locale_override != NULL && *locale_override != '\0') {

/* Don't coerce C locale if the LC_ALL environment variable

is set */

return 0;

}

/* On non-Windows systems, the C locale is considered a legacy locale */

/* XXX (ncoghlan): some platforms (notably Mac OS X) don't appear to treat

* the POSIX locale as a simple alias for the C locale, so

* we may also want to check for that explicitly.

const char *ctype_loc = setlocale(LC_CTYPE, NULL);

return ctype_loc != NULL && strcmp(ctype_loc, "C") == 0;

#else

/* Windows uses code pages instead of locales, so no locale is legacy */

return 0;

#endif

}

#ifndef MS_WINDOWS

static const char *_C_LOCALE_WARNING =

"Python runtime initialized with LC_CTYPE=C (a locale with default ASCII "

"encoding), which may cause Unicode compatibility problems. Using C.UTF-8, "

"C.utf8, or UTF-8 (if available) as alternative Unicode-compatible "

"locales is recommended.\n";

static void

emit_stderr_warning_for_legacy_locale(_PyRuntimeState *runtime)

{

const PyPreConfig *preconfig = &runtime->preconfig;

if (preconfig->coerce_c_locale_warn && _Py_LegacyLocaleDetected(1)) {

PySys_FormatStderr("%s", _C_LOCALE_WARNING);

}

#endif /* !defined(MS_WINDOWS) */

typedef struct _CandidateLocale {

const char *locale_name; /* The locale to try as a coercion target */

} _LocaleCoercionTarget;

static _LocaleCoercionTarget _TARGET_LOCALES[] = {

{"C.UTF-8"},

{"C.utf8"},

{"UTF-8"},

{NULL}

};

int

_Py_IsLocaleCoercionTarget(const char *ctype_loc)

{

const _LocaleCoercionTarget *target = NULL;

for (target = _TARGET_LOCALES; target->locale_name; target++) {

if (strcmp(ctype_loc, target->locale_name) == 0) {

return 1;

}

return 0;

}

#ifdef PY_COERCE_C_LOCALE

static const char C_LOCALE_COERCION_WARNING[] =

"Python detected LC_CTYPE=C: LC_CTYPE coerced to %.20s (set another locale "

"or PYTHONCOERCECLOCALE=0 to disable this locale coercion behavior).\n";

static int

_coerce_default_locale_settings(int warn, const _LocaleCoercionTarget *target)

{

const char *newloc = target->locale_name;

/* Reset locale back to currently configured defaults */

_Py_SetLocaleFromEnv(LC_ALL);

/* Set the relevant locale environment variable */

if (setenv("LC_CTYPE", newloc, 1)) {

fprintf(stderr,

"Error setting LC_CTYPE, skipping C locale coercion\n");

return 0;

}

if (warn) {

fprintf(stderr, C_LOCALE_COERCION_WARNING, newloc);

}

/* Reconfigure with the overridden environment variables */

_Py_SetLocaleFromEnv(LC_ALL);

return 1;

}

#endif

int

_Py_CoerceLegacyLocale(int warn)

{

int coerced = 0;

#ifdef PY_COERCE_C_LOCALE

char *oldloc = NULL;

oldloc = _PyMem_RawStrdup(setlocale(LC_CTYPE, NULL));

if (oldloc == NULL) {

return coerced;

}

const char *locale_override = getenv("LC_ALL");

if (locale_override == NULL || *locale_override == '\0') {

/* LC_ALL is also not set (or is set to an empty string) */

const _LocaleCoercionTarget *target = NULL;

for (target = _TARGET_LOCALES; target->locale_name; target++) {

const char *new_locale = setlocale(LC_CTYPE,

target->locale_name);

if (new_locale != NULL) {

#if !defined(_Py_FORCE_UTF8_LOCALE) && defined(HAVE_LANGINFO_H) && defined(CODESET)

/* Also ensure that nl_langinfo works in this locale */

char *codeset = nl_langinfo(CODESET);

if (!codeset || *codeset == '\0') {

/* CODESET is not set or empty, so skip coercion */

new_locale = NULL;

_Py_SetLocaleFromEnv(LC_CTYPE);

continue;

}

#endif

/* Successfully configured locale, so make it the default */

coerced = _coerce_default_locale_settings(warn, target);

goto done;

}

/* No C locale warning here, as Py_Initialize will emit one later */

setlocale(LC_CTYPE, oldloc);

done:

PyMem_RawFree(oldloc);

#endif

return coerced;

}

/* _Py_SetLocaleFromEnv() is a wrapper around setlocale(category, "") to

* isolate the idiosyncrasies of different libc implementations. It reads the

* appropriate environment variable and uses its value to select the locale for

* 'category'. */

char *

_Py_SetLocaleFromEnv(int category)

{

char *res;

#ifdef __ANDROID__

const char *locale;

const char **pvar;

#ifdef PY_COERCE_C_LOCALE

const char *coerce_c_locale;

#endif

const char *utf8_locale = "C.UTF-8";

const char *env_var_set[] = {

"LC_ALL",

"LC_CTYPE",

"LANG",

NULL,

};

/* Android setlocale(category, "") doesn't check the environment variables

* and incorrectly sets the "C" locale at API 24 and older APIs. We only

* check the environment variables listed in env_var_set. */

for (pvar=env_var_set; *pvar; pvar++) {

locale = getenv(*pvar);

if (locale != NULL && *locale != '\0') {

if (strcmp(locale, utf8_locale) == 0 ||

strcmp(locale, "en_US.UTF-8") == 0) {

return setlocale(category, utf8_locale);

}

return setlocale(category, "C");

}

/* Android uses UTF-8, so explicitly set the locale to C.UTF-8 if none of

* LC_ALL, LC_CTYPE, or LANG is set to a non-empty string.

* Quote from POSIX section "8.2 Internationalization Variables":

* "4. If the LANG environment variable is not set or is set to the empty

* string, the implementation-defined default locale shall be used." */

#ifdef PY_COERCE_C_LOCALE

coerce_c_locale = getenv("PYTHONCOERCECLOCALE");

if (coerce_c_locale == NULL || strcmp(coerce_c_locale, "0") != 0) {

/* Some other ported code may check the environment variables (e.g. in

* extension modules), so we make sure that they match the locale

* configuration */

if (setenv("LC_CTYPE", utf8_locale, 1)) {

fprintf(stderr, "Warning: failed setting the LC_CTYPE "

"environment variable to %s\n", utf8_locale);

}

#endif

res = setlocale(category, utf8_locale);

#else /* !defined(__ANDROID__) */

res = setlocale(category, "");

#endif

_Py_ResetForceASCII();

return res;

}

/* Global initializations. Can be undone by Py_Finalize(). Don't

call this twice without an intervening Py_Finalize() call.

Every call to Py_InitializeFromConfig, Py_Initialize or Py_InitializeEx

must have a corresponding call to Py_Finalize.

Locking: you must hold the interpreter lock while calling these APIs.

(If the lock has not yet been initialized, that's equivalent to

having the lock, but you cannot use multiple threads.)

static PyStatus

pyinit_core_reconfigure(_PyRuntimeState *runtime,

PyThreadState **tstate_p,

const PyConfig *config)

{

PyStatus status;

PyThreadState *tstate = _PyThreadState_GET();

if (!tstate) {

return _PyStatus_ERR("failed to read thread state");

}

*tstate_p = tstate;

PyInterpreterState *interp = tstate->interp;

if (interp == NULL) {

return _PyStatus_ERR("can't make main interpreter");

}

status = _PyConfig_Write(config, runtime);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

status = _PyInterpreterState_SetConfig(interp, config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

config = _PyInterpreterState_GetConfig(interp);

if (config->_install_importlib) {

status = _PyConfig_WritePathConfig(config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

return _PyStatus_OK();

}

static PyStatus

pycore_init_runtime(_PyRuntimeState *runtime,

const PyConfig *config)

{

if (runtime->initialized) {

return _PyStatus_ERR("main interpreter already initialized");

}

PyStatus status = _PyConfig_Write(config, runtime);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

/* Py_Finalize leaves _Py_Finalizing set in order to help daemon

* threads behave a little more gracefully at interpreter shutdown.

* We clobber it here so the new interpreter can start with a clean

* slate.

* However, this may still lead to misbehaviour if there are daemon

* threads still hanging around from a previous Py_Initialize/Finalize

* pair :(

_PyRuntimeState_SetFinalizing(runtime, NULL);

status = _Py_HashRandomization_Init(config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

status = _PyInterpreterState_Enable(runtime);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

return _PyStatus_OK();

}

static PyStatus

init_interp_create_gil(PyThreadState *tstate)

{

PyStatus status;

/* finalize_interp_delete() comment explains why _PyEval_FiniGIL() is

only called here. */

_PyEval_FiniGIL(tstate);

/* Auto-thread-state API */

status = _PyGILState_Init(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

/* Create the GIL and take it */

status = _PyEval_InitGIL(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

return _PyStatus_OK();

}

static PyStatus

pycore_create_interpreter(_PyRuntimeState *runtime,

const PyConfig *config,

PyThreadState **tstate_p)

{

PyInterpreterState *interp = PyInterpreterState_New();

if (interp == NULL) {

return _PyStatus_ERR("can't make main interpreter");

}

PyStatus status = _PyInterpreterState_SetConfig(interp, config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

PyThreadState *tstate = PyThreadState_New(interp);

if (tstate == NULL) {

return _PyStatus_ERR("can't make first thread");

}

(void) PyThreadState_Swap(tstate);

status = init_interp_create_gil(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

*tstate_p = tstate;

return _PyStatus_OK();

}

static PyStatus

pycore_init_types(PyThreadState *tstate)

{

PyStatus status;

int is_main_interp = _Py_IsMainInterpreter(tstate);

status = _PyGC_Init(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (is_main_interp) {

status = _PyTypes_Init();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (!_PyLong_Init(tstate)) {

return _PyStatus_ERR("can't init longs");

}

if (is_main_interp) {

status = _PyUnicode_Init();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

status = _PyExc_Init();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (is_main_interp) {

if (!_PyFloat_Init()) {

return _PyStatus_ERR("can't init float");

}

if (_PyStructSequence_Init() < 0) {

return _PyStatus_ERR("can't initialize structseq");

}

status = _PyErr_Init();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (is_main_interp) {

if (!_PyContext_Init()) {

return _PyStatus_ERR("can't init context");

}

return _PyStatus_OK();

}

static PyStatus

pycore_init_builtins(PyThreadState *tstate)

{

assert(!_PyErr_Occurred(tstate));

PyObject *bimod = _PyBuiltin_Init(tstate);

if (bimod == NULL) {

goto error;

}

PyInterpreterState *interp = tstate->interp;

if (_PyImport_FixupBuiltin(bimod, "builtins", interp->modules) < 0) {

goto error;

}

PyObject *builtins_dict = PyModule_GetDict(bimod);

if (builtins_dict == NULL) {

goto error;

}

Py_INCREF(builtins_dict);

interp->builtins = builtins_dict;

PyStatus status = _PyBuiltins_AddExceptions(bimod);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

interp->builtins_copy = PyDict_Copy(interp->builtins);

if (interp->builtins_copy == NULL) {

goto error;

}

Py_DECREF(bimod);

assert(!_PyErr_Occurred(tstate));

return _PyStatus_OK();

error:

Py_XDECREF(bimod);

return _PyStatus_ERR("can't initialize builtins module");

}

static PyStatus

pycore_init_import_warnings(PyThreadState *tstate, PyObject *sysmod)

{

assert(!_PyErr_Occurred(tstate));

PyStatus status = _PyImportHooks_Init(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

const PyConfig *config = _PyInterpreterState_GetConfig(tstate->interp);

if (_Py_IsMainInterpreter(tstate)) {

/* Initialize _warnings. */

status = _PyWarnings_InitState(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (config->_install_importlib) {

status = _PyConfig_WritePathConfig(config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

/* This call sets up builtin and frozen import support */

if (config->_install_importlib) {

status = init_importlib(tstate, sysmod);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

assert(!_PyErr_Occurred(tstate));

return _PyStatus_OK();

}

static PyStatus

pycore_interp_init(PyThreadState *tstate)

{

PyStatus status;

PyObject *sysmod = NULL;

status = pycore_init_types(tstate);

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

status = _PySys_Create(tstate, &sysmod);

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

status = pycore_init_builtins(tstate);

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

status = pycore_init_import_warnings(tstate, sysmod);

done:

/* sys.modules['sys'] contains a strong reference to the module */

Py_XDECREF(sysmod);

return status;

}

static PyStatus

pyinit_config(_PyRuntimeState *runtime,

PyThreadState **tstate_p,

const PyConfig *config)

{

PyStatus status = pycore_init_runtime(runtime, config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

PyThreadState *tstate;

status = pycore_create_interpreter(runtime, config, &tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

*tstate_p = tstate;

status = pycore_interp_init(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

/* Only when we get here is the runtime core fully initialized */

runtime->core_initialized = 1;

return _PyStatus_OK();

}

PyStatus

_Py_PreInitializeFromPyArgv(const PyPreConfig *src_config, const _PyArgv *args)

{

PyStatus status;

if (src_config == NULL) {

return _PyStatus_ERR("preinitialization config is NULL");

}

status = _PyRuntime_Initialize();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

_PyRuntimeState *runtime = &_PyRuntime;

if (runtime->preinitialized) {

/* If it's already configured: ignored the new configuration */

return _PyStatus_OK();

}

/* Note: preinitialized remains 1 on error, it is only set to 0

at exit on success. */

runtime->preinitializing = 1;

PyPreConfig config;

status = _PyPreConfig_InitFromPreConfig(&config, src_config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

status = _PyPreConfig_Read(&config, args);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

status = _PyPreConfig_Write(&config);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

runtime->preinitializing = 0;

runtime->preinitialized = 1;

return _PyStatus_OK();

}

PyStatus

Py_PreInitializeFromBytesArgs(const PyPreConfig *src_config, Py_ssize_t argc, char **argv)

{

_PyArgv args = {.use_bytes_argv = 1, .argc = argc, .bytes_argv = argv};

return _Py_PreInitializeFromPyArgv(src_config, &args);

}

PyStatus

Py_PreInitializeFromArgs(const PyPreConfig *src_config, Py_ssize_t argc, wchar_t **argv)

{

_PyArgv args = {.use_bytes_argv = 0, .argc = argc, .wchar_argv = argv};

return _Py_PreInitializeFromPyArgv(src_config, &args);

}

PyStatus

Py_PreInitialize(const PyPreConfig *src_config)

{

return _Py_PreInitializeFromPyArgv(src_config, NULL);

}

PyStatus

_Py_PreInitializeFromConfig(const PyConfig *config,

const _PyArgv *args)

{

assert(config != NULL);

PyStatus status = _PyRuntime_Initialize();

if (_PyStatus_EXCEPTION(status)) {

return status;

}

_PyRuntimeState *runtime = &_PyRuntime;

if (runtime->preinitialized) {

/* Already initialized: do nothing */

return _PyStatus_OK();

}

PyPreConfig preconfig;

_PyPreConfig_InitFromConfig(&preconfig, config);

if (!config->parse_argv) {

return Py_PreInitialize(&preconfig);

}

else if (args == NULL) {

_PyArgv config_args = {

.use_bytes_argv = 0,

.argc = config->argv.length,

.wchar_argv = config->argv.items};

return _Py_PreInitializeFromPyArgv(&preconfig, &config_args);

}

else {

return _Py_PreInitializeFromPyArgv(&preconfig, args);

}

/* Begin interpreter initialization

* On return, the first thread and interpreter state have been created,

* but the compiler, signal handling, multithreading and

* multiple interpreter support, and codec infrastructure are not yet

* available.

* The import system will support builtin and frozen modules only.

* The only supported io is writing to sys.stderr

* If any operation invoked by this function fails, a fatal error is

* issued and the function does not return.

* Any code invoked from this function should *not* assume it has access

* to the Python C API (unless the API is explicitly listed as being

* safe to call without calling Py_Initialize first)

static PyStatus

pyinit_core(_PyRuntimeState *runtime,

const PyConfig *src_config,

PyThreadState **tstate_p)

{

PyStatus status;

status = _Py_PreInitializeFromConfig(src_config, NULL);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

PyConfig config;

_PyConfig_InitCompatConfig(&config);

status = _PyConfig_Copy(&config, src_config);

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

status = PyConfig_Read(&config);

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

if (!runtime->core_initialized) {

status = pyinit_config(runtime, tstate_p, &config);

}

else {

status = pyinit_core_reconfigure(runtime, tstate_p, &config);

}

if (_PyStatus_EXCEPTION(status)) {

goto done;

}

done:

PyConfig_Clear(&config);

return status;

}

/* Py_Initialize() has already been called: update the main interpreter

configuration. Example of bpo-34008: Py_Main() called after

Py_Initialize(). */

static PyStatus

_Py_ReconfigureMainInterpreter(PyThreadState *tstate)

{

const PyConfig *config = _PyInterpreterState_GetConfig(tstate->interp);

PyObject *argv = _PyWideStringList_AsList(&config->argv);

if (argv == NULL) {

return _PyStatus_NO_MEMORY(); \

}

int res = PyDict_SetItemString(tstate->interp->sysdict, "argv", argv);

Py_DECREF(argv);

if (res < 0) {

return _PyStatus_ERR("fail to set sys.argv");

}

return _PyStatus_OK();

}

static PyStatus

init_interp_main(PyThreadState *tstate)

{

assert(!_PyErr_Occurred(tstate));

PyStatus status;

int is_main_interp = _Py_IsMainInterpreter(tstate);

PyInterpreterState *interp = tstate->interp;

const PyConfig *config = _PyInterpreterState_GetConfig(interp);

if (!config->_install_importlib) {

/* Special mode for freeze_importlib: run with no import system

* This means anything which needs support from extension modules

* or pure Python code in the standard library won't work.

if (is_main_interp) {

interp->runtime->initialized = 1;

}

return _PyStatus_OK();

}

if (is_main_interp) {

if (_PyTime_Init() < 0) {

return _PyStatus_ERR("can't initialize time");

}

if (_PySys_InitMain(tstate) < 0) {

return _PyStatus_ERR("can't finish initializing sys");

}

status = init_importlib_external(tstate);

if (_PyStatus_EXCEPTION(status)) {

return status;

}

if (is_main_interp) {

View remainder of file in raw view

cpython/Python/pylifecycle.c at master · python-emscripten/cpython · GitHub

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