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3632 lines (3065 loc) · 104 KB
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/* Python interpreter top-level routines, including init/exit */
#include "Python.h"
#include "pycore_call.h" // _PyObject_CallMethod()
#include "pycore_ceval.h" // _PyEval_FiniGIL()
#include "pycore_codecs.h" // _PyCodec_Lookup()
#include "pycore_context.h" // _PyContext_Init()
#include "pycore_dict.h" // _PyDict_Fini()
#include "pycore_exceptions.h" // _PyExc_InitTypes()
#include "pycore_fileutils.h" // _Py_ResetForceASCII()
#include "pycore_floatobject.h" // _PyFloat_InitTypes()
#include "pycore_genobject.h" // _PyAsyncGen_Fini()
#include "pycore_global_objects_fini_generated.h" // "_PyStaticObjects_CheckRefcnt()
#include "pycore_import.h" // _PyImport_BootstrapImp()
#include "pycore_initconfig.h" // _PyStatus_OK()
#include "pycore_list.h" // _PyList_Fini()
#include "pycore_long.h" // _PyLong_InitTypes()
#include "pycore_object.h" // _PyDebug_PrintTotalRefs()
#include "pycore_pathconfig.h" // _PyPathConfig_UpdateGlobal()
#include "pycore_pyerrors.h" // _PyErr_Occurred()
#include "pycore_pylifecycle.h" // _PyErr_Print()
#include "pycore_pymem.h" // _PyObject_DebugMallocStats()
#include "pycore_pystate.h" // _PyThreadState_GET()
#include "pycore_runtime.h" // _Py_ID()
#include "pycore_runtime_init.h" // _PyRuntimeState_INIT
#include "pycore_setobject.h" // _PySet_NextEntry()
#include "pycore_sliceobject.h" // _PySlice_Fini()
#include "pycore_sysmodule.h" // _PySys_ClearAuditHooks()
#include "pycore_traceback.h" // _Py_DumpTracebackThreads()
#include "pycore_typeobject.h" // _PyTypes_InitTypes()
#include "pycore_typevarobject.h" // _Py_clear_generic_types()
#include "pycore_unicodeobject.h" // _PyUnicode_InitTypes()
#include "pycore_weakref.h" // _PyWeakref_GET_REF()
#include "pycore_obmalloc.h" // _PyMem_init_obmalloc()
#include "opcode.h"
#include <locale.h> // setlocale()
#include <stdlib.h> // getenv()
#ifdef HAVE_UNISTD_H
# include <unistd.h> // isatty()
#endif
#if defined(__APPLE__)
# include <AvailabilityMacros.h>
# include <TargetConditionals.h>
# include <mach-o/loader.h>
// The os_log unified logging APIs were introduced in macOS 10.12, iOS 10.0,
// tvOS 10.0, and watchOS 3.0; we enable the use of the system logger
// automatically on non-macOS platforms.
# if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
# define USE_APPLE_SYSTEM_LOG 1
# else
# define USE_APPLE_SYSTEM_LOG 0
# endif
# if USE_APPLE_SYSTEM_LOG
# include <os/log.h>
# endif
#endif
#ifdef HAVE_SIGNAL_H
# include <signal.h> // SIG_IGN
#endif
#ifdef HAVE_LANGINFO_H
# include <langinfo.h> // nl_langinfo(CODESET)
#endif
#ifdef HAVE_FCNTL_H
# include <fcntl.h> // F_GETFD
#endif
#ifdef MS_WINDOWS
# undef BYTE
#endif
#define PUTS(fd, str) (void)_Py_write_noraise(fd, str, (int)strlen(str))
/* 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);
#ifdef __ANDROID__
static PyStatus init_android_streams(PyThreadState *tstate);
#endif
#if defined(__APPLE__) && USE_APPLE_SYSTEM_LOG
static PyStatus init_apple_streams(PyThreadState *tstate);
#endif
static void wait_for_thread_shutdown(PyThreadState *tstate);
static void finalize_subinterpreters(void);
static void call_ll_exitfuncs(_PyRuntimeState *runtime);
/* The following places the `_PyRuntime` structure in a location that can be
* found without any external information. This is meant to ease access to the
* interpreter state for various runtime debugging tools, but is *not* an
* officially supported feature */
/* Suppress deprecation warning for PyBytesObject.ob_shash */
_Py_COMP_DIAG_PUSH
_Py_COMP_DIAG_IGNORE_DEPR_DECLS
#if defined(MS_WINDOWS)
#pragma section("PyRuntime", read, write)
__declspec(allocate("PyRuntime"))
#elif defined(__APPLE__)
__attribute__((
section(SEG_DATA ",PyRuntime")
))
#endif
_PyRuntimeState _PyRuntime
#if defined(__linux__) && (defined(__GNUC__) || defined(__clang__))
__attribute__ ((section (".PyRuntime")))
#endif
= _PyRuntimeState_INIT(_PyRuntime, _Py_Debug_Cookie);
_Py_COMP_DIAG_POP
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 */
/* 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;
}
/* 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;
}
static int
interpreter_update_config(PyThreadState *tstate, int only_update_path_config)
{
const PyConfig *config = &tstate->interp->config;
if (!only_update_path_config) {
PyStatus status = _PyConfig_Write(config, tstate->interp->runtime);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
}
}
if (_Py_IsMainInterpreter(tstate->interp)) {
PyStatus status = _PyPathConfig_UpdateGlobal(config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
return -1;
}
}
tstate->interp->long_state.max_str_digits = config->int_max_str_digits;
// Update the sys module for the new configuration
if (_PySys_UpdateConfig(tstate) < 0) {
return -1;
}
return 0;
}
int
_PyInterpreterState_SetConfig(const PyConfig *src_config)
{
PyThreadState *tstate = _PyThreadState_GET();
int res = -1;
PyConfig config;
PyConfig_InitPythonConfig(&config);
PyStatus status = _PyConfig_Copy(&config, src_config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
goto done;
}
status = _PyConfig_Read(&config, 1);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
goto done;
}
status = _PyConfig_Copy(&tstate->interp->config, &config);
if (_PyStatus_EXCEPTION(status)) {
_PyErr_SetFromPyStatus(status);
goto done;
}
res = interpreter_update_config(tstate, 0);
done:
PyConfig_Clear(&config);
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");
}
assert(interp->_ready);
status = _PyConfig_Write(config, runtime);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyConfig_Copy(&interp->config, config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
config = _PyInterpreterState_GetConfig(interp);
if (config->_install_importlib) {
status = _PyPathConfig_UpdateGlobal(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);
_Py_InitVersion();
status = _Py_HashRandomization_Init(config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyImport_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyInterpreterState_Enable(runtime);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
return _PyStatus_OK();
}
static PyStatus
init_interp_settings(PyInterpreterState *interp,
const PyInterpreterConfig *config)
{
assert(interp->feature_flags == 0);
if (config->use_main_obmalloc) {
interp->feature_flags |= Py_RTFLAGS_USE_MAIN_OBMALLOC;
}
else if (!config->check_multi_interp_extensions) {
/* The reason: PyModuleDef.m_base.m_copy leaks objects between
interpreters. */
return _PyStatus_ERR("per-interpreter obmalloc does not support "
"single-phase init extension modules");
}
#ifdef Py_GIL_DISABLED
if (!_Py_IsMainInterpreter(interp) &&
!config->check_multi_interp_extensions)
{
return _PyStatus_ERR("The free-threaded build does not support "
"single-phase init extension modules in "
"subinterpreters");
}
#endif
if (config->allow_fork) {
interp->feature_flags |= Py_RTFLAGS_FORK;
}
if (config->allow_exec) {
interp->feature_flags |= Py_RTFLAGS_EXEC;
}
// Note that fork+exec is always allowed.
if (config->allow_threads) {
interp->feature_flags |= Py_RTFLAGS_THREADS;
}
if (config->allow_daemon_threads) {
interp->feature_flags |= Py_RTFLAGS_DAEMON_THREADS;
}
if (config->check_multi_interp_extensions) {
interp->feature_flags |= Py_RTFLAGS_MULTI_INTERP_EXTENSIONS;
}
switch (config->gil) {
case PyInterpreterConfig_DEFAULT_GIL: break;
case PyInterpreterConfig_SHARED_GIL: break;
case PyInterpreterConfig_OWN_GIL: break;
default:
return _PyStatus_ERR("invalid interpreter config 'gil' value");
}
return _PyStatus_OK();
}
static void
init_interp_create_gil(PyThreadState *tstate, int gil)
{
/* finalize_interp_delete() comment explains why _PyEval_FiniGIL() is
only called here. */
// XXX This is broken with a per-interpreter GIL.
_PyEval_FiniGIL(tstate->interp);
/* Auto-thread-state API */
_PyGILState_SetTstate(tstate);
int own_gil = (gil == PyInterpreterConfig_OWN_GIL);
/* Create the GIL and take it */
_PyEval_InitGIL(tstate, own_gil);
}
static int
builtins_dict_watcher(PyDict_WatchEvent event, PyObject *dict, PyObject *key, PyObject *new_value)
{
PyInterpreterState *interp = _PyInterpreterState_GET();
#ifdef _Py_TIER2
if (interp->rare_events.builtin_dict < _Py_MAX_ALLOWED_BUILTINS_MODIFICATIONS) {
_Py_Executors_InvalidateAll(interp, 1);
}
#endif
RARE_EVENT_INTERP_INC(interp, builtin_dict);
return 0;
}
static PyStatus
pycore_create_interpreter(_PyRuntimeState *runtime,
const PyConfig *src_config,
PyThreadState **tstate_p)
{
PyStatus status;
PyInterpreterState *interp;
status = _PyInterpreterState_New(NULL, &interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
assert(interp != NULL);
assert(_Py_IsMainInterpreter(interp));
_PyInterpreterState_SetWhence(interp, _PyInterpreterState_WHENCE_RUNTIME);
interp->_ready = 1;
status = _PyConfig_Copy(&interp->config, src_config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
/* Auto-thread-state API */
status = _PyGILState_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
PyInterpreterConfig config = _PyInterpreterConfig_LEGACY_INIT;
// The main interpreter always has its own GIL and supports single-phase
// init extensions.
config.gil = PyInterpreterConfig_OWN_GIL;
config.check_multi_interp_extensions = 0;
status = init_interp_settings(interp, &config);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
// This could be done in init_interpreter() (in pystate.c) if it
// didn't depend on interp->feature_flags being set already.
status = _PyObject_InitState(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
// initialize the interp->obmalloc state. This must be done after
// the settings are loaded (so that feature_flags are set) but before
// any calls are made to obmalloc functions.
if (_PyMem_init_obmalloc(interp) < 0) {
return _PyStatus_NO_MEMORY();
}
status = _PyTraceMalloc_Init();
if (_PyStatus_EXCEPTION(status)) {
return status;
}
PyThreadState *tstate = _PyThreadState_New(interp,
_PyThreadState_WHENCE_INIT);
if (tstate == NULL) {
return _PyStatus_ERR("can't make first thread");
}
runtime->main_tstate = tstate;
_PyThreadState_Bind(tstate);
init_interp_create_gil(tstate, config.gil);
*tstate_p = tstate;
return _PyStatus_OK();
}
static PyStatus
pycore_init_global_objects(PyInterpreterState *interp)
{
PyStatus status;
_PyFloat_InitState(interp);
status = _PyUnicode_InitGlobalObjects(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
_PyUnicode_InitState(interp);
if (_Py_IsMainInterpreter(interp)) {
_Py_GetConstant_Init();
}
return _PyStatus_OK();
}
static PyStatus
pycore_init_types(PyInterpreterState *interp)
{
PyStatus status;
status = _PyTypes_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyLong_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyUnicode_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyFloat_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
if (_PyExc_InitTypes(interp) < 0) {
return _PyStatus_ERR("failed to initialize an exception type");
}
status = _PyExc_InitGlobalObjects(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyExc_InitState(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyErr_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyContext_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyXI_InitTypes(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
return _PyStatus_OK();
}
static PyStatus
pycore_init_builtins(PyThreadState *tstate)
{
PyInterpreterState *interp = tstate->interp;
PyObject *bimod = _PyBuiltin_Init(interp);
if (bimod == NULL) {
goto error;
}
PyObject *modules = _PyImport_GetModules(interp);
if (_PyImport_FixupBuiltin(tstate, bimod, "builtins", modules) < 0) {
goto error;
}
PyObject *builtins_dict = PyModule_GetDict(bimod);
if (builtins_dict == NULL) {
goto error;
}
interp->builtins = Py_NewRef(builtins_dict);
PyObject *isinstance = PyDict_GetItemWithError(builtins_dict, &_Py_ID(isinstance));
if (!isinstance) {
goto error;
}
interp->callable_cache.isinstance = isinstance;
PyObject *len = PyDict_GetItemWithError(builtins_dict, &_Py_ID(len));
if (!len) {
goto error;
}
interp->callable_cache.len = len;
PyObject *list_append = _PyType_Lookup(&PyList_Type, &_Py_ID(append));
if (list_append == NULL) {
goto error;
}
interp->callable_cache.list_append = list_append;
PyObject *object__getattribute__ = _PyType_Lookup(&PyBaseObject_Type, &_Py_ID(__getattribute__));
if (object__getattribute__ == NULL) {
goto error;
}
interp->callable_cache.object__getattribute__ = object__getattribute__;
if (_PyBuiltins_AddExceptions(bimod) < 0) {
return _PyStatus_ERR("failed to add exceptions to builtins");
}
interp->builtins_copy = PyDict_Copy(interp->builtins);
if (interp->builtins_copy == NULL) {
goto error;
}
Py_DECREF(bimod);
if (_PyImport_InitDefaultImportFunc(interp) < 0) {
goto error;
}
assert(!_PyErr_Occurred(tstate));
return _PyStatus_OK();
error:
Py_XDECREF(bimod);
return _PyStatus_ERR("can't initialize builtins module");
}
static PyStatus
pycore_interp_init(PyThreadState *tstate)
{
PyInterpreterState *interp = tstate->interp;
PyStatus status;
PyObject *sysmod = NULL;
// Create singletons before the first PyType_Ready() call, since
// PyType_Ready() uses singletons like the Unicode empty string (tp_doc)
// and the empty tuple singletons (tp_bases).
status = pycore_init_global_objects(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyCode_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PyDtoa_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
// The GC must be initialized before the first GC collection.
status = _PyGC_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = pycore_init_types(interp);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
if (_PyWarnings_InitState(interp) < 0) {
return _PyStatus_ERR("can't initialize warnings");
}
status = _PyAtExit_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
return status;
}
status = _PySys_Create(tstate, &sysmod);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
status = pycore_init_builtins(tstate);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
status = _PyXI_Init(interp);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
const PyConfig *config = _PyInterpreterState_GetConfig(interp);
status = _PyImport_InitCore(tstate, sysmod, config->_install_importlib);
if (_PyStatus_EXCEPTION(status)) {
goto done;
}
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)) {