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Copy pathpylifecycle.c
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2234 lines (1917 loc) · 62.7 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/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; /* Needed by parser.c */
int Py_VerboseFlag; /* Needed by import.c */
int Py_QuietFlag; /* Needed by sysmodule.c */
int Py_InteractiveFlag; /* Needed by Py_FdIsInteractive() below */
int Py_InspectFlag; /* Needed to determine whether to exit at SystemExit */
int Py_OptimizeFlag = 0; /* Needed by compile.c */
int Py_NoSiteFlag; /* Suppress 'import site' */
int Py_BytesWarningFlag; /* Warn on str(bytes) and str(buffer) */
int Py_FrozenFlag; /* Needed by getpath.c */
int Py_IgnoreEnvironmentFlag; /* e.g. PYTHONPATH, PYTHONHOME */
int Py_DontWriteBytecodeFlag; /* 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;
}
/* 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) {
return -2;
}
}
if (errors) {
_Py_StandardStreamErrors = _PyMem_RawStrdup(errors);
if (!_Py_StandardStreamErrors) {
if (_Py_StandardStreamEncoding) {
PyMem_RawFree(_Py_StandardStreamEncoding);
}
return -3;
}
}
#ifdef MS_WINDOWS
if (_Py_StandardStreamEncoding) {
/* Overriding the stream encoding implies legacy streams */
Py_LegacyWindowsStdioFlag = 1;
}
#endif
return 0;
}
/* 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) {
Py_DECREF(value);
value = PyObject_CallMethod(importlib,
"_install_external_importers", "");
}
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.)
*/
/* 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)
*/
_PyInitError
_Py_InitializeCore(const _PyCoreConfig *core_config)
{
assert(core_config != NULL);
PyInterpreterState *interp;
PyThreadState *tstate;
PyObject *bimod, *sysmod, *pstderr;
_PyInitError err;
err = _PyRuntime_Initialize();
if (_Py_INIT_FAILED(err)) {
return err;
}
if (_PyMem_SetupAllocators(core_config->allocator) < 0) {
return _Py_INIT_USER_ERR("Unknown PYTHONMALLOC allocator");
}
if (_PyRuntime.initialized) {
return _Py_INIT_ERR("main interpreter already initialized");
}
if (_PyRuntime.core_initialized) {
return _Py_INIT_ERR("runtime core already initialized");
}
/* 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;
}
if (!core_config->use_hash_seed || core_config->hash_seed) {
/* Random or non-zero hash seed */
Py_HashRandomizationFlag = 1;
}
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");
}
if (_PyCoreConfig_Copy(&interp->core_config, core_config) < 0) {
return _Py_INIT_ERR("failed to copy core config");
}
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);
_Py_ReadyTypes();
if (!_PyFrame_Init())
return _Py_INIT_ERR("can't init frames");
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;
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");
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. */
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");
}
/* This call sets up builtin and frozen import support */
if (!interp->core_config._disable_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();
}
/* 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(const _PyMainInterpreterConfig *config)
{
PyInterpreterState *interp;
PyThreadState *tstate;
_PyInitError err;
if (!_PyRuntime.core_initialized) {
return _Py_INIT_ERR("runtime core not initialized");
}
if (_PyRuntime.initialized) {
return _Py_INIT_ERR("main interpreter already initialized");
}
/* Get current thread state and interpreter pointer */
tstate = PyThreadState_GET();
if (!tstate)
return _Py_INIT_ERR("failed to read thread state");
interp = tstate->interp;
if (!interp)
return _Py_INIT_ERR("failed to get interpreter");
/* Now finish configuring the main interpreter */
if (_PyMainInterpreterConfig_Copy(&interp->config, config) < 0) {
return _Py_INIT_ERR("failed to copy main interpreter config");
}
if (interp->core_config._disable_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");
}
err = initexternalimport(interp);
if (_Py_INIT_FAILED(err)) {
return err;
}
/* initialize the faulthandler module */
err = _PyFaulthandler_Init(interp->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(interp->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 (!Py_NoSiteFlag) {
err = initsite(); /* Module site */
if (_Py_INIT_FAILED(err)) {
return err;
}
}
return _Py_INIT_OK();
}
#undef _INIT_DEBUG_PRINT
_PyInitError
_Py_InitializeEx_Private(int install_sigs, int install_importlib)
{
_PyCoreConfig config = _PyCoreConfig_INIT;
_PyInitError err;
config.ignore_environment = Py_IgnoreEnvironmentFlag;
config._disable_importlib = !install_importlib;
config.install_signal_handlers = install_sigs;
err = _PyCoreConfig_Read(&config);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = _Py_InitializeCore(&config);
if (_Py_INIT_FAILED(err)) {
goto done;
}
_PyMainInterpreterConfig main_config = _PyMainInterpreterConfig_INIT;
err = _PyMainInterpreterConfig_Read(&main_config, &config);
if (!_Py_INIT_FAILED(err)) {
err = _Py_InitializeMainInterpreter(&main_config);
}
_PyMainInterpreterConfig_Clear(&main_config);
if (_Py_INIT_FAILED(err)) {
goto done;
}
err = _Py_INIT_OK();
done:
_PyCoreConfig_Clear(&config);
return err;
}
void
Py_InitializeEx(int install_sigs)
{
_PyInitError err = _Py_InitializeEx_Private(install_sigs, 1);
if (_Py_INIT_FAILED(err)) {
_Py_FatalInitError(err);
}
}
void
Py_Initialize(void)
{
Py_InitializeEx(1);
}
#ifdef COUNT_ALLOCS
extern void dump_counts(FILE*);
#endif
/* Flush stdout and stderr */
static int
file_is_closed(PyObject *fobj)
{
int r;
PyObject *tmp = PyObject_GetAttrString(fobj, "closed");
if (tmp == NULL) {
PyErr_Clear();
return 0;
}
r = PyObject_IsTrue(tmp);
Py_DECREF(tmp);
if (r < 0)
PyErr_Clear();
return r > 0;
}
static int
flush_std_files(void)
{
PyObject *fout = _PySys_GetObjectId(&PyId_stdout);
PyObject *ferr = _PySys_GetObjectId(&PyId_stderr);
PyObject *tmp;
int status = 0;
if (fout != NULL && fout != Py_None && !file_is_closed(fout)) {
tmp = _PyObject_CallMethodId(fout, &PyId_flush, NULL);
if (tmp == NULL) {
PyErr_WriteUnraisable(fout);
status = -1;
}
else
Py_DECREF(tmp);
}
if (ferr != NULL && ferr != Py_None && !file_is_closed(ferr)) {
tmp = _PyObject_CallMethodId(ferr, &PyId_flush, NULL);
if (tmp == NULL) {
PyErr_Clear();
status = -1;
}
else
Py_DECREF(tmp);
}
return status;
}
/* Undo the effect of Py_Initialize().
Beware: if multiple interpreter and/or thread states exist, these
are not wiped out; only the current thread and interpreter state
are deleted. But since everything else is deleted, those other
interpreter and thread states should no longer be used.
(XXX We should do better, e.g. wipe out all interpreters and
threads.)
Locking: as above.
*/
int
Py_FinalizeEx(void)
{
PyInterpreterState *interp;
PyThreadState *tstate;
int status = 0;