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2365 lines (2000 loc) · 63.5 KB
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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_coreconfig.h"
#include "pycore_context.h"
#include "pycore_fileutils.h"
#include "pycore_hamt.h"
#include "pycore_pathconfig.h"
#include "pycore_pylifecycle.h"
#include "pycore_pymem.h"
#include "pycore_pystate.h"
#include "grammar.h"
#include "node.h"
#include "token.h"
#include "parsetok.h"
#include "errcode.h"
#include "code.h"
#include "symtable.h"
#include "ast.h"
#include "marshal.h"
#include "osdefs.h"
#include <locale.h>
#ifdef HAVE_SIGNAL_H
#include <signal.h>
#endif
#ifdef MS_WINDOWS
#include "malloc.h" /* for alloca */
#endif
#ifdef HAVE_LANGINFO_H
#include <langinfo.h>
#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
extern grammar _PyParser_Grammar; /* From graminit.c */
/* Forward */
static _PyInitError add_main_module(PyInterpreterState *interp);
static _PyInitError initfsencoding(PyInterpreterState *interp);
static _PyInitError initsite(void);
static _PyInitError init_sys_streams(PyInterpreterState *interp);
static _PyInitError initsigs(void);
static void call_py_exitfuncs(PyInterpreterState *);
static void wait_for_thread_shutdown(void);
static void call_ll_exitfuncs(void);
int _Py_UnhandledKeyboardInterrupt = 0;
_PyRuntimeState _PyRuntime = _PyRuntimeState_INIT;
static int runtime_initialized = 0;
_PyInitError
_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 _Py_INIT_OK();
}
runtime_initialized = 1;
return _PyRuntimeState_Init(&_PyRuntime);
}
void
_PyRuntime_Finalize(void)
{
_PyRuntimeState_Fini(&_PyRuntime);
runtime_initialized = 0;
}
int
_Py_IsFinalizing(void)
{
return _PyRuntime.finalizing != 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 char*
get_codec_name(const char *encoding)
{
const char *name_utf8;
char *name_str;
PyObject *codec, *name = NULL;
codec = _PyCodec_Lookup(encoding);
if (!codec)
goto error;
name = _PyObject_GetAttrId(codec, &PyId_name);
Py_CLEAR(codec);
if (!name)
goto error;
name_utf8 = PyUnicode_AsUTF8(name);
if (name_utf8 == NULL)
goto error;
name_str = _PyMem_RawStrdup(name_utf8);
Py_DECREF(name);
if (name_str == NULL) {
PyErr_NoMemory();
return NULL;
}
return name_str;
error:
Py_XDECREF(codec);
Py_XDECREF(name);
return NULL;
}
static _PyInitError
initimport(PyInterpreterState *interp, PyObject *sysmod)
{
PyObject *importlib;
PyObject *impmod;
PyObject *value;
/* Import _importlib through its frozen version, _frozen_importlib. */
if (PyImport_ImportFrozenModule("_frozen_importlib") <= 0) {
return _Py_INIT_ERR("can't import _frozen_importlib");
}
else if (Py_VerboseFlag) {
PySys_FormatStderr("import _frozen_importlib # frozen\n");
}
importlib = PyImport_AddModule("_frozen_importlib");
if (importlib == NULL) {
return _Py_INIT_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 _Py_INIT_ERR("__import__ not found");
Py_INCREF(interp->import_func);
/* Import the _imp module */
impmod = PyInit__imp();
if (impmod == NULL) {
return _Py_INIT_ERR("can't import _imp");
}
else if (Py_VerboseFlag) {
PySys_FormatStderr("import _imp # builtin\n");
}
if (_PyImport_SetModuleString("_imp", impmod) < 0) {
return _Py_INIT_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();
return _Py_INIT_ERR("importlib install failed");
}
Py_DECREF(value);
Py_DECREF(impmod);
return _Py_INIT_OK();
}
static _PyInitError
initexternalimport(PyInterpreterState *interp)
{
PyObject *value;
value = PyObject_CallMethod(interp->importlib,
"_install_external_importers", "");
if (value == NULL) {
PyErr_Print();
return _Py_INIT_ERR("external importer setup failed");
}
Py_DECREF(value);
return _PyImportZip_Init();
}
/* 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(void)
{
#ifndef MS_WINDOWS
/* 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
}
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(void)
{
const _PyPreConfig *preconfig = &_PyRuntime.preconfig;
if (preconfig->coerce_c_locale_warn && _Py_LegacyLocaleDetected()) {
PySys_FormatStderr("%s", _C_LOCALE_WARNING);
}
}
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 void
_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;
}
if (warn) {
fprintf(stderr, C_LOCALE_COERCION_WARNING, newloc);
}
/* Reconfigure with the overridden environment variables */
_Py_SetLocaleFromEnv(LC_ALL);
}
#endif
void
_Py_CoerceLegacyLocale(int warn)
{
#ifdef PY_COERCE_C_LOCALE
char *oldloc = NULL;
oldloc = _PyMem_RawStrdup(setlocale(LC_CTYPE, NULL));
if (oldloc == NULL) {
return;
}
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(__APPLE__) && !defined(__ANDROID__) && \
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 */
_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
}
/* _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 _PyInitError
_Py_Initialize_ReconfigureCore(PyInterpreterState **interp_p,
const _PyCoreConfig *core_config)
{
PyThreadState *tstate = _PyThreadState_GET();
if (!tstate) {
return _Py_INIT_ERR("failed to read thread state");
}
PyInterpreterState *interp = tstate->interp;
if (interp == NULL) {
return _Py_INIT_ERR("can't make main interpreter");
}
*interp_p = interp;
_PyCoreConfig_Write(core_config);
if (_PyCoreConfig_Copy(&interp->core_config, core_config) < 0) {
return _Py_INIT_NO_MEMORY();
}
core_config = &interp->core_config;
if (core_config->_install_importlib) {
_PyInitError err = _PyCoreConfig_SetPathConfig(core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
return _Py_INIT_OK();
}
static _PyInitError
pycore_init_runtime(const _PyCoreConfig *core_config)
{
if (_PyRuntime.initialized) {
return _Py_INIT_ERR("main interpreter already initialized");
}
_PyCoreConfig_Write(core_config);
_PyInitError err = _PyRuntime_Initialize();
if (_Py_INIT_FAILED(err)) {
return err;
}
/* 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 :(
*/
_PyRuntime.finalizing = NULL;
err = _Py_HashRandomization_Init(core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = _PyInterpreterState_Enable(&_PyRuntime);
if (_Py_INIT_FAILED(err)) {
return err;
}
return _Py_INIT_OK();
}
static _PyInitError
pycore_create_interpreter(const _PyCoreConfig *core_config,
PyInterpreterState **interp_p)
{
PyInterpreterState *interp = PyInterpreterState_New();
if (interp == NULL) {
return _Py_INIT_ERR("can't make main interpreter");
}
*interp_p = interp;
if (_PyCoreConfig_Copy(&interp->core_config, core_config) < 0) {
return _Py_INIT_NO_MEMORY();
}
core_config = &interp->core_config;
PyThreadState *tstate = PyThreadState_New(interp);
if (tstate == NULL)
return _Py_INIT_ERR("can't make first thread");
(void) PyThreadState_Swap(tstate);
/* We can't call _PyEval_FiniThreads() in Py_FinalizeEx because
destroying the GIL might fail when it is being referenced from
another running thread (see issue #9901).
Instead we destroy the previously created GIL here, which ensures
that we can call Py_Initialize / Py_FinalizeEx multiple times. */
_PyEval_FiniThreads();
/* Auto-thread-state API */
_PyGILState_Init(interp, tstate);
/* Create the GIL */
PyEval_InitThreads();
return _Py_INIT_OK();
}
static _PyInitError
pycore_init_types(void)
{
_PyInitError err = _PyTypes_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
err = _PyUnicode_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
if (_PyStructSequence_Init() < 0) {
return _Py_INIT_ERR("can't initialize structseq");
}
if (!_PyLong_Init()) {
return _Py_INIT_ERR("can't init longs");
}
err = _PyExc_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
if (!_PyFloat_Init()) {
return _Py_INIT_ERR("can't init float");
}
if (!_PyContext_Init()) {
return _Py_INIT_ERR("can't init context");
}
return _Py_INIT_OK();
}
static _PyInitError
pycore_init_builtins(PyInterpreterState *interp)
{
PyObject *bimod = _PyBuiltin_Init();
if (bimod == NULL) {
return _Py_INIT_ERR("can't initialize builtins modules");
}
_PyImport_FixupBuiltin(bimod, "builtins", interp->modules);
interp->builtins = PyModule_GetDict(bimod);
if (interp->builtins == NULL) {
return _Py_INIT_ERR("can't initialize builtins dict");
}
Py_INCREF(interp->builtins);
_PyInitError err = _PyBuiltins_AddExceptions(bimod);
if (_Py_INIT_FAILED(err)) {
return err;
}
return _Py_INIT_OK();
}
static _PyInitError
pycore_init_import_warnings(PyInterpreterState *interp, PyObject *sysmod)
{
_PyInitError err = _PyImport_Init(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = _PyImportHooks_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
/* Initialize _warnings. */
if (_PyWarnings_Init() == NULL) {
return _Py_INIT_ERR("can't initialize warnings");
}
if (interp->core_config._install_importlib) {
err = _PyCoreConfig_SetPathConfig(&interp->core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
/* This call sets up builtin and frozen import support */
if (interp->core_config._install_importlib) {
err = initimport(interp, sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
return _Py_INIT_OK();
}
static _PyInitError
_Py_InitializeCore_impl(PyInterpreterState **interp_p,
const _PyCoreConfig *core_config)
{
PyInterpreterState *interp;
_PyCoreConfig_Write(core_config);
_PyInitError err = pycore_init_runtime(core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = pycore_create_interpreter(core_config, &interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
core_config = &interp->core_config;
*interp_p = interp;
err = pycore_init_types();
if (_Py_INIT_FAILED(err)) {
return err;
}
PyObject *sysmod;
err = _PySys_Create(interp, &sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = pycore_init_builtins(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = pycore_init_import_warnings(interp, sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
/* Only when we get here is the runtime core fully initialized */
_PyRuntime.core_initialized = 1;
return _Py_INIT_OK();
}
static _PyInitError
preinit(const _PyPreConfig *src_config, const _PyArgv *args)
{
_PyInitError err;
err = _PyRuntime_Initialize();
if (_Py_INIT_FAILED(err)) {
return err;
}
if (_PyRuntime.pre_initialized) {
/* If it's already configured: ignored the new configuration */
return _Py_INIT_OK();
}
_PyPreConfig config = _PyPreConfig_INIT;
if (src_config) {
if (_PyPreConfig_Copy(&config, src_config) < 0) {
err = _Py_INIT_NO_MEMORY();
goto done;
}
}
err = _PyPreConfig_Read(&config, args);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = _PyPreConfig_Write(&config);
if (_Py_INIT_FAILED(err)) {
goto done;
}
_PyRuntime.pre_initialized = 1;
err = _Py_INIT_OK();
done:
_PyPreConfig_Clear(&config);
return err;
}
_PyInitError
_Py_PreInitializeFromArgs(const _PyPreConfig *src_config, int argc, char **argv)
{
_PyArgv args = {.use_bytes_argv = 1, .argc = argc, .bytes_argv = argv};
return preinit(src_config, &args);
}
_PyInitError
_Py_PreInitializeFromWideArgs(const _PyPreConfig *src_config, int argc, wchar_t **argv)
{
_PyArgv args = {.use_bytes_argv = 0, .argc = argc, .wchar_argv = argv};
return preinit(src_config, &args);
}
_PyInitError
_Py_PreInitialize(const _PyPreConfig *src_config)
{
return preinit(src_config, NULL);
}
_PyInitError
_Py_PreInitializeFromCoreConfig(const _PyCoreConfig *coreconfig)
{
assert(coreconfig != NULL);
_PyPreConfig config = _PyPreConfig_INIT;
_PyCoreConfig_GetCoreConfig(&config, coreconfig);
return _Py_PreInitialize(&config);
/* No need to clear config:
_PyCoreConfig_GetCoreConfig() doesn't allocate memory */
}
static _PyInitError
pyinit_coreconfig(_PyCoreConfig *config,
const _PyCoreConfig *src_config,
const _PyArgv *args,
PyInterpreterState **interp_p)
{
if (src_config) {
if (_PyCoreConfig_Copy(config, src_config) < 0) {
return _Py_INIT_NO_MEMORY();
}
}
_PyInitError err = _PyCoreConfig_Read(config, args);
if (_Py_INIT_FAILED(err)) {
return err;
}
if (!_PyRuntime.core_initialized) {
return _Py_InitializeCore_impl(interp_p, config);
}
else {
return _Py_Initialize_ReconfigureCore(interp_p, config);
}
}
/* 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 _PyInitError
_Py_InitializeCore(const _PyCoreConfig *src_config,
const _PyArgv *args,
PyInterpreterState **interp_p)
{
_PyInitError err;
if (src_config) {
err = _Py_PreInitializeFromCoreConfig(src_config);
}
else {
err = _Py_PreInitialize(NULL);
}
if (_Py_INIT_FAILED(err)) {
return err;
}
_PyCoreConfig local_config = _PyCoreConfig_INIT;
err = pyinit_coreconfig(&local_config, src_config, args, interp_p);
_PyCoreConfig_Clear(&local_config);
return err;
}
/* Py_Initialize() has already been called: update the main interpreter
configuration. Example of bpo-34008: Py_Main() called after
Py_Initialize(). */
static _PyInitError
_Py_ReconfigureMainInterpreter(PyInterpreterState *interp)
{
_PyCoreConfig *core_config = &interp->core_config;
PyObject *argv = _PyWstrList_AsList(&core_config->argv);
if (argv == NULL) {
return _Py_INIT_NO_MEMORY(); \
}
int res = PyDict_SetItemString(interp->sysdict, "argv", argv);
Py_DECREF(argv);
if (res < 0) {
return _Py_INIT_ERR("fail to set sys.argv");
}
return _Py_INIT_OK();
}
/* Update interpreter state based on supplied configuration settings
*
* After calling this function, most of the restrictions on the interpreter
* are lifted. The only remaining incomplete settings are those related
* to the main module (sys.argv[0], __main__ metadata)
*
* Calling this when the interpreter is not initializing, is already
* initialized or without a valid current thread state is a fatal error.
* Other errors should be reported as normal Python exceptions with a
* non-zero return code.
*/
static _PyInitError
_Py_InitializeMainInterpreter(PyInterpreterState *interp)
{
if (!_PyRuntime.core_initialized) {
return _Py_INIT_ERR("runtime core not initialized");
}
/* Configure the main interpreter */
_PyCoreConfig *core_config = &interp->core_config;
if (_PyRuntime.initialized) {
return _Py_ReconfigureMainInterpreter(interp);
}
if (!core_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.
*/
_PyRuntime.initialized = 1;
return _Py_INIT_OK();
}
if (_PyTime_Init() < 0) {
return _Py_INIT_ERR("can't initialize time");
}
if (_PySys_InitMain(interp) < 0) {
return _Py_INIT_ERR("can't finish initializing sys");
}
_PyInitError err = initexternalimport(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
/* initialize the faulthandler module */
err = _PyFaulthandler_Init(core_config->faulthandler);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = initfsencoding(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
if (core_config->install_signal_handlers) {
err = initsigs(); /* Signal handling stuff, including initintr() */
if (_Py_INIT_FAILED(err)) {
return err;
}
}
if (_PyTraceMalloc_Init(core_config->tracemalloc) < 0) {
return _Py_INIT_ERR("can't initialize tracemalloc");
}
err = add_main_module(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = init_sys_streams(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
/* Initialize warnings. */
PyObject *warnoptions = PySys_GetObject("warnoptions");
if (warnoptions != NULL && PyList_Size(warnoptions) > 0)
{
PyObject *warnings_module = PyImport_ImportModule("warnings");
if (warnings_module == NULL) {
fprintf(stderr, "'import warnings' failed; traceback:\n");
PyErr_Print();
}
Py_XDECREF(warnings_module);
}
_PyRuntime.initialized = 1;
if (core_config->site_import) {
err = initsite(); /* Module site */
if (_Py_INIT_FAILED(err)) {
return err;
}
}
#ifndef MS_WINDOWS
_emit_stderr_warning_for_legacy_locale();
#endif
return _Py_INIT_OK();
}
#undef _INIT_DEBUG_PRINT
static _PyInitError
init_python(const _PyCoreConfig *config, const _PyArgv *args)
{
PyInterpreterState *interp = NULL;
_PyInitError err;
err = _Py_InitializeCore(config, args, &interp);
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