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Copy pathpylifecycle.c
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2546 lines (2126 loc) · 67.8 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_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) {