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2353 lines (2011 loc) · 66.2 KB
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Copy pathpylifecycle.c
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2353 lines (2011 loc) · 66.2 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 "internal/context.h"
#include "internal/hamt.h"
#include "internal/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);
extern int _PyUnicode_Init(void);
extern int _PyStructSequence_Init(void);
extern void _PyUnicode_Fini(void);
extern int _PyLong_Init(void);
extern void PyLong_Fini(void);
extern _PyInitError _PyFaulthandler_Init(int enable);
extern void _PyFaulthandler_Fini(void);
extern void _PyHash_Fini(void);
extern int _PyTraceMalloc_Init(int enable);
extern int _PyTraceMalloc_Fini(void);
extern void _Py_ReadyTypes(void);
extern void _PyGILState_Init(PyInterpreterState *, PyThreadState *);
extern void _PyGILState_Fini(void);
_PyRuntimeState _PyRuntime = _PyRuntimeState_INIT;
_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. */
static int initialized = 0;
if (initialized) {
return _Py_INIT_OK();
}
initialized = 1;
return _PyRuntimeState_Init(&_PyRuntime);
}
void
_PyRuntime_Finalize(void)
{
_PyRuntimeState_Fini(&_PyRuntime);
}
int
_Py_IsFinalizing(void)
{
return _PyRuntime.finalizing != NULL;
}
/* Global configuration variable declarations are in pydebug.h */
/* XXX (ncoghlan): move those declarations to pylifecycle.h? */
int Py_DebugFlag = 0; /* Needed by parser.c */
int Py_VerboseFlag = 0; /* Needed by import.c */
int Py_QuietFlag = 0; /* Needed by sysmodule.c */
int Py_InteractiveFlag = 0; /* Needed by Py_FdIsInteractive() below */
int Py_InspectFlag = 0; /* Needed to determine whether to exit at SystemExit */
int Py_OptimizeFlag = 0; /* Needed by compile.c */
int Py_NoSiteFlag = 0; /* Suppress 'import site' */
int Py_BytesWarningFlag = 0; /* Warn on str(bytes) and str(buffer) */
int Py_FrozenFlag = 0; /* Needed by getpath.c */
int Py_IgnoreEnvironmentFlag = 0; /* e.g. PYTHONPATH, PYTHONHOME */
int Py_DontWriteBytecodeFlag = 0; /* Suppress writing bytecode files (*.pyc) */
int Py_NoUserSiteDirectory = 0; /* for -s and site.py */
int Py_UnbufferedStdioFlag = 0; /* Unbuffered binary std{in,out,err} */
int Py_HashRandomizationFlag = 0; /* for -R and PYTHONHASHSEED */
int Py_IsolatedFlag = 0; /* for -I, isolate from user's env */
#ifdef MS_WINDOWS
int Py_LegacyWindowsFSEncodingFlag = 0; /* Uses mbcs instead of utf-8 */
int Py_LegacyWindowsStdioFlag = 0; /* Uses FileIO instead of WindowsConsoleIO */
#endif
/* 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;
}
/* Helper to allow an embedding application to override the normal
* mechanism that attempts to figure out an appropriate IO encoding
*/
static char *_Py_StandardStreamEncoding = NULL;
static char *_Py_StandardStreamErrors = NULL;
int
Py_SetStandardStreamEncoding(const char *encoding, const char *errors)
{
if (Py_IsInitialized()) {
/* This is too late to have any effect */
return -1;
}
int res = 0;
/* Py_SetStandardStreamEncoding() can be called before Py_Initialize(),
but Py_Initialize() can change the allocator. Use a known allocator
to be able to release the memory later. */
PyMemAllocatorEx old_alloc;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
/* Can't call PyErr_NoMemory() on errors, as Python hasn't been
* initialised yet.
*
* However, the raw memory allocators are initialised appropriately
* as C static variables, so _PyMem_RawStrdup is OK even though
* Py_Initialize hasn't been called yet.
*/
if (encoding) {
_Py_StandardStreamEncoding = _PyMem_RawStrdup(encoding);
if (!_Py_StandardStreamEncoding) {
res = -2;
goto done;
}
}
if (errors) {
_Py_StandardStreamErrors = _PyMem_RawStrdup(errors);
if (!_Py_StandardStreamErrors) {
if (_Py_StandardStreamEncoding) {
PyMem_RawFree(_Py_StandardStreamEncoding);
}
res = -3;
goto done;
}
}
#ifdef MS_WINDOWS
if (_Py_StandardStreamEncoding) {
/* Overriding the stream encoding implies legacy streams */
Py_LegacyWindowsStdioFlag = 1;
}
#endif
done:
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
return res;
}
/* 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 char*
get_locale_encoding(void)
{
#if defined(HAVE_LANGINFO_H) && defined(CODESET)
char* codeset = nl_langinfo(CODESET);
if (!codeset || codeset[0] == '\0') {
PyErr_SetString(PyExc_ValueError, "CODESET is not set or empty");
return NULL;
}
return get_codec_name(codeset);
#elif defined(__ANDROID__)
return get_codec_name("UTF-8");
#else
PyErr_SetNone(PyExc_NotImplementedError);
return NULL;
#endif
}
static _PyInitError
initimport(PyInterpreterState *interp, PyObject *sysmod)
{
PyObject *importlib;
PyObject *impmod;
PyObject *value;
_PyInitError err;
/* 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);
err = _PyImportZip_Init();
if (_Py_INIT_FAILED(err)) {
return err;
}
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 _Py_INIT_OK();
}
/* 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(const _PyCoreConfig *core_config)
{
if (core_config->coerce_c_locale_warn) {
if (_Py_LegacyLocaleDetected()) {
fprintf(stderr, "%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}
};
static const char *
get_default_standard_stream_error_handler(void)
{
const char *ctype_loc = setlocale(LC_CTYPE, NULL);
if (ctype_loc != NULL) {
/* "surrogateescape" is the default in the legacy C locale */
if (strcmp(ctype_loc, "C") == 0) {
return "surrogateescape";
}
#ifdef PY_COERCE_C_LOCALE
/* "surrogateescape" is the default in locale coercion target locales */
const _LocaleCoercionTarget *target = NULL;
for (target = _TARGET_LOCALES; target->locale_name; target++) {
if (strcmp(ctype_loc, target->locale_name) == 0) {
return "surrogateescape";
}
}
#endif
}
/* Otherwise return NULL to request the typical default error handler */
return NULL;
}
#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(const _PyCoreConfig *config, 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 (config->coerce_c_locale_warn) {
fprintf(stderr, C_LOCALE_COERCION_WARNING, newloc);
}
/* Reconfigure with the overridden environment variables */
_Py_SetLocaleFromEnv(LC_ALL);
}
#endif
void
_Py_CoerceLegacyLocale(const _PyCoreConfig *config)
{
#ifdef PY_COERCE_C_LOCALE
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(config, target);
return;
}
}
}
/* No C locale warning here, as Py_Initialize will emit one later */
#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)
{
#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
return setlocale(category, utf8_locale);
#else /* __ANDROID__ */
return setlocale(category, "");
#endif /* __ANDROID__ */
}
/* Global initializations. Can be undone by Py_Finalize(). Don't
call this twice without an intervening Py_Finalize() call.
Every call to _Py_InitializeCore, 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,
const _PyCoreConfig *core_config)
{
if (core_config->allocator != NULL) {
const char *allocator = _PyMem_GetAllocatorsName();
if (allocator == NULL || strcmp(core_config->allocator, allocator) != 0) {
return _Py_INIT_USER_ERR("cannot modify memory allocator "
"after first Py_Initialize()");
}
}
_PyCoreConfig_SetGlobalConfig(core_config);
if (_PyCoreConfig_Copy(&interp->core_config, core_config) < 0) {
return _Py_INIT_ERR("failed to copy core config");
}
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();
}
/* 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)
*
* The caller is responsible to call _PyCoreConfig_Read().
*/
static _PyInitError
_Py_InitializeCore_impl(PyInterpreterState **interp_p,
const _PyCoreConfig *core_config)
{
PyInterpreterState *interp;
_PyInitError err;
/* bpo-34008: For backward compatibility reasons, calling Py_Main() after
Py_Initialize() ignores the new configuration. */
if (_PyRuntime.core_initialized) {
PyThreadState *tstate = PyThreadState_GET();
if (!tstate) {
return _Py_INIT_ERR("failed to read thread state");
}
interp = tstate->interp;
if (interp == NULL) {
return _Py_INIT_ERR("can't make main interpreter");
}
*interp_p = interp;
return _Py_Initialize_ReconfigureCore(interp, core_config);
}
if (_PyRuntime.initialized) {
return _Py_INIT_ERR("main interpreter already initialized");
}
_PyCoreConfig_SetGlobalConfig(core_config);
err = _PyRuntime_Initialize();
if (_Py_INIT_FAILED(err)) {
return err;
}
if (core_config->allocator != NULL) {
if (_PyMem_SetupAllocators(core_config->allocator) < 0) {
return _Py_INIT_USER_ERR("Unknown PYTHONMALLOC allocator");
}
}
/* 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;
#ifndef MS_WINDOWS
/* Set up the LC_CTYPE locale, so we can obtain
the locale's charset without having to switch
locales. */
_Py_SetLocaleFromEnv(LC_CTYPE);
_emit_stderr_warning_for_legacy_locale(core_config);
#endif
err = _Py_HashRandomization_Init(core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
err = _PyInterpreterState_Enable(&_PyRuntime);
if (_Py_INIT_FAILED(err)) {
return err;
}
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_ERR("failed to copy core config");
}
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();
_Py_ReadyTypes();
if (!_PyLong_Init())
return _Py_INIT_ERR("can't init longs");
if (!PyByteArray_Init())
return _Py_INIT_ERR("can't init bytearray");
if (!_PyFloat_Init())
return _Py_INIT_ERR("can't init float");
PyObject *modules = PyDict_New();
if (modules == NULL)
return _Py_INIT_ERR("can't make modules dictionary");
interp->modules = modules;
PyObject *sysmod;
err = _PySys_BeginInit(&sysmod);
if (_Py_INIT_FAILED(err)) {
return err;
}
interp->sysdict = PyModule_GetDict(sysmod);
if (interp->sysdict == NULL) {
return _Py_INIT_ERR("can't initialize sys dict");
}
Py_INCREF(interp->sysdict);
PyDict_SetItemString(interp->sysdict, "modules", modules);
_PyImport_FixupBuiltin(sysmod, "sys", modules);
/* Init Unicode implementation; relies on the codec registry */
if (_PyUnicode_Init() < 0)
return _Py_INIT_ERR("can't initialize unicode");
if (_PyStructSequence_Init() < 0)
return _Py_INIT_ERR("can't initialize structseq");
PyObject *bimod = _PyBuiltin_Init();
if (bimod == NULL)
return _Py_INIT_ERR("can't initialize builtins modules");
_PyImport_FixupBuiltin(bimod, "builtins", modules);
interp->builtins = PyModule_GetDict(bimod);
if (interp->builtins == NULL)
return _Py_INIT_ERR("can't initialize builtins dict");
Py_INCREF(interp->builtins);
/* initialize builtin exceptions */
_PyExc_Init(bimod);
/* Set up a preliminary stderr printer until we have enough
infrastructure for the io module in place. */
PyObject *pstderr = PyFile_NewStdPrinter(fileno(stderr));
if (pstderr == NULL)
return _Py_INIT_ERR("can't set preliminary stderr");
_PySys_SetObjectId(&PyId_stderr, pstderr);
PySys_SetObject("__stderr__", pstderr);
Py_DECREF(pstderr);
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 (!_PyContext_Init())
return _Py_INIT_ERR("can't init context");
if (core_config->_install_importlib) {
err = _PyCoreConfig_SetPathConfig(core_config);
if (_Py_INIT_FAILED(err)) {
return err;
}
}
/* This call sets up builtin and frozen import support */
if (core_config->_install_importlib) {
err = initimport(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();
}
_PyInitError
_Py_InitializeCore(PyInterpreterState **interp_p,
const _PyCoreConfig *src_config)
{
assert(src_config != NULL);
PyMemAllocatorEx old_alloc;
_PyInitError err;
/* Copy the configuration, since _PyCoreConfig_Read() modifies it
(and the input configuration is read only). */
_PyCoreConfig config = _PyCoreConfig_INIT;
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_PyCoreConfig_Copy(&config, src_config) >= 0) {
err = _PyCoreConfig_Read(&config);
}
else {
err = _Py_INIT_ERR("failed to copy core config");
}
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = _Py_InitializeCore_impl(interp_p, &config);
done:
_PyMem_SetDefaultAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
_PyCoreConfig_Clear(&config);
PyMem_SetAllocator(PYMEM_DOMAIN_RAW, &old_alloc);
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,
const _PyMainInterpreterConfig *config)
{
if (config->argv != NULL) {
int res = PyDict_SetItemString(interp->sysdict, "argv", config->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.
*/
_PyInitError
_Py_InitializeMainInterpreter(PyInterpreterState *interp,
const _PyMainInterpreterConfig *config)
{
if (!_PyRuntime.core_initialized) {
return _Py_INIT_ERR("runtime core not initialized");
}
/* Configure the main interpreter */
if (_PyMainInterpreterConfig_Copy(&interp->config, config) < 0) {
return _Py_INIT_ERR("failed to copy main interpreter config");
}
config = &interp->config;
_PyCoreConfig *core_config = &interp->core_config;
if (_PyRuntime.initialized) {
return _Py_ReconfigureMainInterpreter(interp, config);
}
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_EndInit(interp->sysdict, &interp->config) < 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 (interp->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. */
if (interp->config.warnoptions != NULL &&
PyList_Size(interp->config.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;
}
}
return _Py_INIT_OK();
}
#undef _INIT_DEBUG_PRINT
_PyInitError
_Py_InitializeFromConfig(const _PyCoreConfig *config)
{
PyInterpreterState *interp;
_PyInitError err;
err = _Py_InitializeCore(&interp, config);
if (_Py_INIT_FAILED(err)) {
return err;
}
config = &interp->core_config;
_PyMainInterpreterConfig main_config = _PyMainInterpreterConfig_INIT;
err = _PyMainInterpreterConfig_Read(&main_config, config);
if (!_Py_INIT_FAILED(err)) {