mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
00611e9b06
The ZIP filesystem has a breaking change. You now need to use /zip/ to open() / opendir() / etc. assets within the ZIP structure of your APE binary, instead of the previous convention of using zip: or zip! URIs. This is needed because Python likes to use absolute paths, and having ZIP paths encoded like URIs simply broke too many things. Many more system calls have been updated to be able to operate on ZIP files and file descriptors. In particular fcntl() and ioctl() since Python would do things like ask if a ZIP file is a terminal and get confused when the old implementation mistakenly said yes, because the fastest way to guarantee native file descriptors is to dup(2). This change also improves the async signal safety of zipos and ensures it doesn't maintain any open file descriptors beyond that which the user has opened. This change makes a lot of progress towards adding magic numbers that are specific to platforms other than Linux. The philosophy here is that, if you use an operating system like FreeBSD, then you should be able to take advantage of FreeBSD exclusive features, even if we don't polyfill them on other platforms. For example, you can now open() a file with the O_VERIFY flag. If your program runs on other platforms, then Cosmo will automatically set O_VERIFY to zero. This lets you safely use it without the need for #ifdef or ifstatements which detract from readability. One of the blindspots of the ASAN memory hardening we use to offer Rust like assurances has always been that memory passed to the kernel via system calls (e.g. writev) can't be checked automatically since the kernel wasn't built with MODE=asan. This change makes more progress ensuring that each system call will verify the soundness of memory before it's passed to the kernel. The code for doing these checks is fast, particularly for buffers, where it can verify 64 bytes a cycle. - Correct O_LOOP definition on NT - Introduce program_executable_name - Add ASAN guards to more system calls - Improve termios compatibility with BSDs - Fix bug in Windows auxiliary value encoding - Add BSD and XNU specific errnos and open flags - Add check to ensure build doesn't talk to internet
1713 lines
49 KiB
C
1713 lines
49 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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|
#include "libc/assert.h"
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|
#include "libc/calls/calls.h"
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|
#include "libc/calls/internal.h"
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|
#include "libc/calls/sigbits.h"
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|
#include "libc/dce.h"
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|
#include "libc/fmt/conv.h"
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|
#include "libc/log/check.h"
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|
#include "libc/log/log.h"
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|
#include "libc/runtime/runtime.h"
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|
#include "libc/stdio/stdio.h"
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|
#include "libc/sysv/consts/sig.h"
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|
#include "libc/unicode/locale.h"
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|
#include "third_party/python/Include/Python-ast.h"
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|
#include "third_party/python/Include/abstract.h"
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|
#include "third_party/python/Include/ast.h"
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|
#include "third_party/python/Include/boolobject.h"
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|
#include "third_party/python/Include/code.h"
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|
#include "third_party/python/Include/codecs.h"
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|
#include "third_party/python/Include/dictobject.h"
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|
#include "third_party/python/Include/errcode.h"
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|
#include "third_party/python/Include/fileobject.h"
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|
#include "third_party/python/Include/grammar.h"
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|
#include "third_party/python/Include/import.h"
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|
#include "third_party/python/Include/intrcheck.h"
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|
#include "third_party/python/Include/marshal.h"
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|
#include "third_party/python/Include/modsupport.h"
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|
#include "third_party/python/Include/node.h"
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|
#include "third_party/python/Include/objimpl.h"
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|
#include "third_party/python/Include/osdefs.h"
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|
#include "third_party/python/Include/parsetok.h"
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|
#include "third_party/python/Include/pydebug.h"
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|
#include "third_party/python/Include/pyerrors.h"
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|
#include "third_party/python/Include/pylifecycle.h"
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|
#include "third_party/python/Include/pymem.h"
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|
#include "third_party/python/Include/pystrcmp.h"
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|
#include "third_party/python/Include/pytime.h"
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|
#include "third_party/python/Include/symtable.h"
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|
#include "third_party/python/Include/sysmodule.h"
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|
#include "third_party/python/Include/token.h"
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|
#include "third_party/python/Include/traceback.h"
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|
#include "third_party/python/Include/unicodeobject.h"
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|
#include "third_party/python/Include/warnings.h"
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|
/* clang-format off */
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|
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|
/* Python interpreter top-level routines, including init/exit */
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|
|
|
_Py_IDENTIFIER(flush);
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_Py_IDENTIFIER(name);
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|
_Py_IDENTIFIER(stdin);
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|
_Py_IDENTIFIER(stdout);
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|
_Py_IDENTIFIER(stderr);
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|
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extern grammar _PyParser_Grammar; /* From graminit.c */
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|
|
/* Forward */
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|
static void initmain(PyInterpreterState *interp);
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|
static int initfsencoding(PyInterpreterState *interp);
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|
static void initsite(void);
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|
static int initstdio(void);
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|
static void initsigs(void);
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|
static void call_py_exitfuncs(void);
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|
static void wait_for_thread_shutdown(void);
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|
static void call_ll_exitfuncs(void);
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|
extern int _PyUnicode_Init(void);
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|
extern int _PyStructSequence_Init(void);
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|
extern void _PyUnicode_Fini(void);
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|
extern int _PyLong_Init(void);
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|
extern void PyLong_Fini(void);
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|
extern int _PyFaulthandler_Init(void);
|
|
extern void _PyFaulthandler_Fini(void);
|
|
extern void _PyHash_Fini(void);
|
|
extern int _PyTraceMalloc_Init(void);
|
|
extern int _PyTraceMalloc_Fini(void);
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|
|
|
#ifdef WITH_THREAD
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|
extern void _PyGILState_Init(PyInterpreterState *, PyThreadState *);
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|
extern void _PyGILState_Fini(void);
|
|
#endif /* WITH_THREAD */
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|
|
|
/* Global configuration variable declarations are in pydebug.h */
|
|
/* XXX (ncoghlan): move those declarations to pylifecycle.h? */
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|
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 */
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|
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_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c: deprecated */
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|
int Py_FrozenFlag; /* Needed by getpath.c */
|
|
int Py_IgnoreEnvironmentFlag; /* e.g. PYTHONPATH, PYTHONHOME */
|
|
int Py_DontWriteBytecodeFlag; /* Suppress writing bytecode files (*.pyc) */
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|
int Py_NoUserSiteDirectory = 0; /* for -s and site.py */
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|
int Py_UnbufferedStdioFlag = 0; /* Unbuffered binary std{in,out,err} */
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|
int Py_HashRandomizationFlag = 0; /* for -R and PYTHONHASHSEED */
|
|
int Py_IsolatedFlag = 0; /* for -I, isolate from user's env */
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|
#ifdef MS_WINDOWS
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|
int Py_LegacyWindowsFSEncodingFlag = 0; /* Uses mbcs instead of utf-8 */
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|
int Py_LegacyWindowsStdioFlag = 0; /* Uses FileIO instead of WindowsConsoleIO */
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|
#endif
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|
|
|
PyThreadState *_Py_Finalizing = NULL;
|
|
|
|
/* Hack to force loading of object files */
|
|
int (*_PyOS_mystrnicmp_hack)(const char *, const char *, Py_ssize_t) = \
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PyOS_mystrnicmp; /* Python/pystrcmp.o */
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|
|
|
/* PyModule_GetWarningsModule is no longer necessary as of 2.6
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|
since _warnings is builtin. This API should not be used. */
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|
PyObject *
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|
PyModule_GetWarningsModule(void)
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|
{
|
|
return PyImport_ImportModule("warnings");
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|
}
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|
|
|
static int initialized = 0;
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|
|
/* API to access the initialized flag -- useful for esoteric use */
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|
|
|
int
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Py_IsInitialized(void)
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|
{
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return initialized;
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|
}
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|
|
|
/* Helper to allow an embedding application to override the normal
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|
* mechanism that attempts to figure out an appropriate IO encoding
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|
*/
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|
|
|
static char *_Py_StandardStreamEncoding = NULL;
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|
static char *_Py_StandardStreamErrors = NULL;
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|
|
|
int
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|
Py_SetStandardStreamEncoding(const char *encoding, const char *errors)
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|
{
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|
if (Py_IsInitialized()) {
|
|
/* This is too late to have any effect */
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|
return -1;
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|
}
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|
/* Can't call PyErr_NoMemory() on errors, as Python hasn't been
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* initialised yet.
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*
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* However, the raw memory allocators are initialised appropriately
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* as C static variables, so _PyMem_RawStrdup is OK even though
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|
* Py_Initialize hasn't been called yet.
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*/
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if (encoding) {
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|
_Py_StandardStreamEncoding = _PyMem_RawStrdup(encoding);
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|
if (!_Py_StandardStreamEncoding) {
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return -2;
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}
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}
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|
if (errors) {
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|
_Py_StandardStreamErrors = _PyMem_RawStrdup(errors);
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|
if (!_Py_StandardStreamErrors) {
|
|
if (_Py_StandardStreamEncoding) {
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|
PyMem_RawFree(_Py_StandardStreamEncoding);
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|
}
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return -3;
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}
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|
}
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|
#ifdef MS_WINDOWS
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if (_Py_StandardStreamEncoding) {
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|
/* Overriding the stream encoding implies legacy streams */
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Py_LegacyWindowsStdioFlag = 1;
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}
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#endif
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return 0;
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|
}
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|
|
/* Global initializations. Can be undone by Py_FinalizeEx(). Don't
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call this twice without an intervening Py_FinalizeEx() call. When
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|
initializations fail, a fatal error is issued and the function does
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not return. On return, the first thread and interpreter state have
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been created.
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Locking: you must hold the interpreter lock while calling this.
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(If the lock has not yet been initialized, that's equivalent to
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having the lock, but you cannot use multiple threads.)
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|
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*/
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static int
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add_flag(int flag, const char *envs)
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|
{
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|
int env = atoi(envs);
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|
if (flag < env)
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|
flag = env;
|
|
if (flag < 1)
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|
flag = 1;
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|
return flag;
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|
}
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|
static char*
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get_codec_name(const char *encoding)
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|
{
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|
char *name_utf8, *name_str;
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PyObject *codec, *name = NULL;
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codec = _PyCodec_Lookup(encoding);
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if (!codec)
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goto error;
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name = _PyObject_GetAttrId(codec, &PyId_name);
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Py_CLEAR(codec);
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if (!name)
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goto error;
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name_utf8 = PyUnicode_AsUTF8(name);
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if (name_utf8 == NULL)
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goto error;
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name_str = _PyMem_RawStrdup(name_utf8);
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Py_DECREF(name);
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if (name_str == NULL) {
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PyErr_NoMemory();
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return NULL;
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|
}
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return name_str;
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error:
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|
Py_XDECREF(codec);
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Py_XDECREF(name);
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return NULL;
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}
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|
static char*
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get_locale_encoding(void)
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|
{
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|
#ifdef MS_WINDOWS
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char codepage[100];
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PyOS_snprintf(codepage, sizeof(codepage), "cp%d", GetACP());
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return get_codec_name(codepage);
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#elif defined(HAVE_LANGINFO_H) && defined(CODESET)
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char* codeset = nl_langinfo(CODESET);
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if (!codeset || codeset[0] == '\0') {
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PyErr_SetString(PyExc_ValueError, "CODESET is not set or empty");
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return NULL;
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}
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|
return get_codec_name(codeset);
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|
#elif defined(__ANDROID__) || defined(__COSMOPOLITAN__)
|
|
return get_codec_name("UTF-8");
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|
#else
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PyErr_SetNone(PyExc_NotImplementedError);
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return NULL;
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#endif
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|
}
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static void
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import_init(PyInterpreterState *interp, PyObject *sysmod)
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|
{
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|
PyObject *importlib;
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|
PyObject *impmod;
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PyObject *sys_modules;
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|
PyObject *value;
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|
|
/* Import _importlib through its frozen version, _frozen_importlib. */
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if (PyImport_ImportFrozenModule("_frozen_importlib") <= 0) {
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Py_FatalError("Py_Initialize: can't import _frozen_importlib");
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}
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else if (Py_VerboseFlag) {
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PySys_FormatStderr("import _frozen_importlib # frozen\n");
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}
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|
importlib = PyImport_AddModule("_frozen_importlib");
|
|
if (importlib == NULL) {
|
|
Py_FatalError("Py_Initialize: couldn't get _frozen_importlib from "
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"sys.modules");
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}
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interp->importlib = importlib;
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Py_INCREF(interp->importlib);
|
|
|
|
interp->import_func = PyDict_GetItemString(interp->builtins, "__import__");
|
|
if (interp->import_func == NULL)
|
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Py_FatalError("Py_Initialize: __import__ not found");
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|
Py_INCREF(interp->import_func);
|
|
|
|
/* Import the _imp module */
|
|
impmod = PyInit_imp();
|
|
if (impmod == NULL) {
|
|
Py_FatalError("Py_Initialize: can't import _imp");
|
|
}
|
|
else if (Py_VerboseFlag) {
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PySys_FormatStderr("import _imp # builtin\n");
|
|
}
|
|
sys_modules = PyImport_GetModuleDict();
|
|
if (Py_VerboseFlag) {
|
|
PySys_FormatStderr("import sys # builtin\n");
|
|
}
|
|
if (PyDict_SetItemString(sys_modules, "_imp", impmod) < 0) {
|
|
Py_FatalError("Py_Initialize: 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();
|
|
Py_FatalError("Py_Initialize: importlib install failed");
|
|
}
|
|
Py_DECREF(value);
|
|
Py_DECREF(impmod);
|
|
|
|
/* just add /zip/.python/ to sys.path */
|
|
/* _PyImportZip_Init(); */
|
|
PyImport_ImportModule("_codecs");
|
|
PyImport_ImportModule("_collections");
|
|
PyImport_ImportModule("_functools");
|
|
PyImport_ImportModule("_heapq");
|
|
PyImport_ImportModule("_locale");
|
|
PyImport_ImportModule("_operator");
|
|
PyImport_ImportModule("_signal");
|
|
PyImport_ImportModule("_sre");
|
|
PyImport_ImportModule("_stat");
|
|
PyImport_ImportModule("errno");
|
|
PyImport_ImportModule("itertools");
|
|
}
|
|
|
|
|
|
void
|
|
_Py_InitializeEx_Private(int install_sigs, int install_importlib)
|
|
{
|
|
PyInterpreterState *interp;
|
|
PyThreadState *tstate;
|
|
PyObject *bimod, *sysmod, *pstderr;
|
|
char *p;
|
|
extern void _Py_ReadyTypes(void);
|
|
|
|
if (initialized)
|
|
return;
|
|
initialized = 1;
|
|
_Py_Finalizing = NULL;
|
|
|
|
#ifdef HAVE_SETLOCALE
|
|
/* Set up the LC_CTYPE locale, so we can obtain
|
|
the locale's charset without having to switch
|
|
locales. */
|
|
setlocale(LC_CTYPE, "");
|
|
#endif
|
|
|
|
if ((p = Py_GETENV("PYTHONDEBUG")) && *p != '\0')
|
|
Py_DebugFlag = add_flag(Py_DebugFlag, p);
|
|
if ((p = Py_GETENV("PYTHONVERBOSE")) && *p != '\0')
|
|
Py_VerboseFlag = add_flag(Py_VerboseFlag, p);
|
|
if ((p = Py_GETENV("PYTHONOPTIMIZE")) && *p != '\0')
|
|
Py_OptimizeFlag = add_flag(Py_OptimizeFlag, p);
|
|
if ((p = Py_GETENV("PYTHONDONTWRITEBYTECODE")) && *p != '\0')
|
|
Py_DontWriteBytecodeFlag = add_flag(Py_DontWriteBytecodeFlag, p);
|
|
#ifdef MS_WINDOWS
|
|
if ((p = Py_GETENV("PYTHONLEGACYWINDOWSFSENCODING")) && *p != '\0')
|
|
Py_LegacyWindowsFSEncodingFlag = add_flag(Py_LegacyWindowsFSEncodingFlag, p);
|
|
if ((p = Py_GETENV("PYTHONLEGACYWINDOWSSTDIO")) && *p != '\0')
|
|
Py_LegacyWindowsStdioFlag = add_flag(Py_LegacyWindowsStdioFlag, p);
|
|
#endif
|
|
|
|
_PyRandom_Init();
|
|
|
|
interp = PyInterpreterState_New();
|
|
if (interp == NULL)
|
|
Py_FatalError("Py_Initialize: can't make first interpreter");
|
|
|
|
tstate = PyThreadState_New(interp);
|
|
if (tstate == NULL)
|
|
Py_FatalError("Py_Initialize: can't make first thread");
|
|
(void) PyThreadState_Swap(tstate);
|
|
|
|
#ifdef WITH_THREAD
|
|
/* 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);
|
|
#endif /* WITH_THREAD */
|
|
|
|
_Py_ReadyTypes();
|
|
|
|
if (!_PyFrame_Init())
|
|
Py_FatalError("Py_Initialize: can't init frames");
|
|
|
|
if (!_PyLong_Init())
|
|
Py_FatalError("Py_Initialize: can't init longs");
|
|
|
|
if (!PyByteArray_Init())
|
|
Py_FatalError("Py_Initialize: can't init bytearray");
|
|
|
|
if (!_PyFloat_Init())
|
|
Py_FatalError("Py_Initialize: can't init float");
|
|
|
|
interp->modules = PyDict_New();
|
|
if (interp->modules == NULL)
|
|
Py_FatalError("Py_Initialize: can't make modules dictionary");
|
|
|
|
/* Init Unicode implementation; relies on the codec registry */
|
|
if (_PyUnicode_Init() < 0)
|
|
Py_FatalError("Py_Initialize: can't initialize unicode");
|
|
if (_PyStructSequence_Init() < 0)
|
|
Py_FatalError("Py_Initialize: can't initialize structseq");
|
|
|
|
bimod = _PyBuiltin_Init();
|
|
if (bimod == NULL)
|
|
Py_FatalError("Py_Initialize: can't initialize builtins modules");
|
|
_PyImport_FixupBuiltin(bimod, "builtins");
|
|
interp->builtins = PyModule_GetDict(bimod);
|
|
if (interp->builtins == NULL)
|
|
Py_FatalError("Py_Initialize: can't initialize builtins dict");
|
|
Py_INCREF(interp->builtins);
|
|
|
|
/* initialize builtin exceptions */
|
|
_PyExc_Init(bimod);
|
|
|
|
sysmod = _PySys_Init();
|
|
if (sysmod == NULL)
|
|
Py_FatalError("Py_Initialize: can't initialize sys");
|
|
interp->sysdict = PyModule_GetDict(sysmod);
|
|
if (interp->sysdict == NULL)
|
|
Py_FatalError("Py_Initialize: can't initialize sys dict");
|
|
Py_INCREF(interp->sysdict);
|
|
_PyImport_FixupBuiltin(sysmod, "sys");
|
|
PySys_SetPath(Py_GetPath());
|
|
PyDict_SetItemString(interp->sysdict, "modules",
|
|
interp->modules);
|
|
|
|
/* 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)
|
|
Py_FatalError("Py_Initialize: can't set preliminary stderr");
|
|
_PySys_SetObjectId(&PyId_stderr, pstderr);
|
|
PySys_SetObject("__stderr__", pstderr);
|
|
Py_DECREF(pstderr);
|
|
|
|
_PyImport_Init();
|
|
|
|
_PyImportHooks_Init();
|
|
|
|
/* Initialize _warnings. */
|
|
_PyWarnings_Init();
|
|
|
|
if (!install_importlib)
|
|
return;
|
|
|
|
if (_PyTime_Init() < 0)
|
|
Py_FatalError("Py_Initialize: can't initialize time");
|
|
|
|
import_init(interp, sysmod);
|
|
|
|
/* initialize the faulthandler module */
|
|
if (_PyFaulthandler_Init())
|
|
Py_FatalError("Py_Initialize: can't initialize faulthandler");
|
|
|
|
if (initfsencoding(interp) < 0)
|
|
Py_FatalError("Py_Initialize: unable to load the file system codec");
|
|
|
|
if (install_sigs)
|
|
initsigs(); /* Signal handling stuff, including initintr() */
|
|
|
|
if (_PyTraceMalloc_Init() < 0)
|
|
Py_FatalError("Py_Initialize: can't initialize tracemalloc");
|
|
|
|
initmain(interp); /* Module __main__ */
|
|
if (initstdio() < 0) {
|
|
Py_FatalError(
|
|
"Py_Initialize: can't initialize sys standard streams");
|
|
}
|
|
|
|
/* Initialize warnings. */
|
|
if (PySys_HasWarnOptions()) {
|
|
PyObject *warnings_module = PyImport_ImportModule("warnings");
|
|
if (warnings_module == NULL) {
|
|
fprintf(stderr, "'import warnings' failed; traceback:\n");
|
|
PyErr_Print();
|
|
}
|
|
Py_XDECREF(warnings_module);
|
|
}
|
|
|
|
if (!Py_NoSiteFlag)
|
|
initsite(); /* Module site */
|
|
}
|
|
|
|
void
|
|
Py_InitializeEx(int install_sigs)
|
|
{
|
|
_Py_InitializeEx_Private(install_sigs, 1);
|
|
}
|
|
|
|
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;
|
|
|
|
if (!initialized)
|
|
return status;
|
|
|
|
wait_for_thread_shutdown();
|
|
|
|
/* The interpreter is still entirely intact at this point, and the
|
|
* exit funcs may be relying on that. In particular, if some thread
|
|
* or exit func is still waiting to do an import, the import machinery
|
|
* expects Py_IsInitialized() to return true. So don't say the
|
|
* interpreter is uninitialized until after the exit funcs have run.
|
|
* Note that Threading.py uses an exit func to do a join on all the
|
|
* threads created thru it, so this also protects pending imports in
|
|
* the threads created via Threading.
|
|
*/
|
|
call_py_exitfuncs();
|
|
|
|
/* Get current thread state and interpreter pointer */
|
|
tstate = PyThreadState_GET();
|
|
interp = tstate->interp;
|
|
|
|
/* Remaining threads (e.g. daemon threads) will automatically exit
|
|
after taking the GIL (in PyEval_RestoreThread()). */
|
|
_Py_Finalizing = tstate;
|
|
initialized = 0;
|
|
|
|
/* Flush sys.stdout and sys.stderr */
|
|
if (flush_std_files() < 0) {
|
|
status = -1;
|
|
}
|
|
|
|
/* Disable signal handling */
|
|
PyOS_FiniInterrupts();
|
|
|
|
/* Collect garbage. This may call finalizers; it's nice to call these
|
|
* before all modules are destroyed.
|
|
* XXX If a __del__ or weakref callback is triggered here, and tries to
|
|
* XXX import a module, bad things can happen, because Python no
|
|
* XXX longer believes it's initialized.
|
|
* XXX Fatal Python error: Interpreter not initialized (version mismatch?)
|
|
* XXX is easy to provoke that way. I've also seen, e.g.,
|
|
* XXX Exception exceptions.ImportError: 'No module named sha'
|
|
* XXX in <function callback at 0x008F5718> ignored
|
|
* XXX but I'm unclear on exactly how that one happens. In any case,
|
|
* XXX I haven't seen a real-life report of either of these.
|
|
*/
|
|
_PyGC_CollectIfEnabled();
|
|
#ifdef COUNT_ALLOCS
|
|
/* With COUNT_ALLOCS, it helps to run GC multiple times:
|
|
each collection might release some types from the type
|
|
list, so they become garbage. */
|
|
while (_PyGC_CollectIfEnabled() > 0)
|
|
/* nothing */;
|
|
#endif
|
|
/* Destroy all modules */
|
|
PyImport_Cleanup();
|
|
|
|
/* Flush sys.stdout and sys.stderr (again, in case more was printed) */
|
|
if (flush_std_files() < 0) {
|
|
status = -1;
|
|
}
|
|
|
|
/* Collect final garbage. This disposes of cycles created by
|
|
* class definitions, for example.
|
|
* XXX This is disabled because it caused too many problems. If
|
|
* XXX a __del__ or weakref callback triggers here, Python code has
|
|
* XXX a hard time running, because even the sys module has been
|
|
* XXX cleared out (sys.stdout is gone, sys.excepthook is gone, etc).
|
|
* XXX One symptom is a sequence of information-free messages
|
|
* XXX coming from threads (if a __del__ or callback is invoked,
|
|
* XXX other threads can execute too, and any exception they encounter
|
|
* XXX triggers a comedy of errors as subsystem after subsystem
|
|
* XXX fails to find what it *expects* to find in sys to help report
|
|
* XXX the exception and consequent unexpected failures). I've also
|
|
* XXX seen segfaults then, after adding print statements to the
|
|
* XXX Python code getting called.
|
|
*/
|
|
#if 0
|
|
_PyGC_CollectIfEnabled();
|
|
#endif
|
|
|
|
/* Disable tracemalloc after all Python objects have been destroyed,
|
|
so it is possible to use tracemalloc in objects destructor. */
|
|
_PyTraceMalloc_Fini();
|
|
|
|
/* Destroy the database used by _PyImport_{Fixup,Find}Extension */
|
|
_PyImport_Fini();
|
|
|
|
/* Cleanup typeobject.c's internal caches. */
|
|
_PyType_Fini();
|
|
|
|
/* unload faulthandler module */
|
|
_PyFaulthandler_Fini();
|
|
|
|
/* Debugging stuff */
|
|
#ifdef COUNT_ALLOCS
|
|
dump_counts(stderr);
|
|
#endif
|
|
/* dump hash stats */
|
|
_PyHash_Fini();
|
|
|
|
_PY_DEBUG_PRINT_TOTAL_REFS();
|
|
|
|
#ifdef Py_TRACE_REFS
|
|
/* Display all objects still alive -- this can invoke arbitrary
|
|
* __repr__ overrides, so requires a mostly-intact interpreter.
|
|
* Alas, a lot of stuff may still be alive now that will be cleaned
|
|
* up later.
|
|
*/
|
|
if (Py_GETENV("PYTHONDUMPREFS"))
|
|
_Py_PrintReferences(stderr);
|
|
#endif /* Py_TRACE_REFS */
|
|
|
|
/* Clear interpreter state and all thread states. */
|
|
PyInterpreterState_Clear(interp);
|
|
|
|
/* Now we decref the exception classes. After this point nothing
|
|
can raise an exception. That's okay, because each Fini() method
|
|
below has been checked to make sure no exceptions are ever
|
|
raised.
|
|
*/
|
|
|
|
_PyExc_Fini();
|
|
|
|
/* Sundry finalizers */
|
|
PyMethod_Fini();
|
|
PyFrame_Fini();
|
|
PyCFunction_Fini();
|
|
PyTuple_Fini();
|
|
PyList_Fini();
|
|
PySet_Fini();
|
|
PyBytes_Fini();
|
|
PyByteArray_Fini();
|
|
PyLong_Fini();
|
|
PyFloat_Fini();
|
|
PyDict_Fini();
|
|
PySlice_Fini();
|
|
_PyGC_Fini();
|
|
_PyRandom_Fini();
|
|
_PyArg_Fini();
|
|
PyAsyncGen_Fini();
|
|
|
|
/* Cleanup Unicode implementation */
|
|
_PyUnicode_Fini();
|
|
|
|
/* reset file system default encoding */
|
|
if (!Py_HasFileSystemDefaultEncoding && Py_FileSystemDefaultEncoding) {
|
|
PyMem_RawFree((char*)Py_FileSystemDefaultEncoding);
|
|
Py_FileSystemDefaultEncoding = NULL;
|
|
}
|
|
|
|
/* XXX Still allocated:
|
|
- various static ad-hoc pointers to interned strings
|
|
- int and float free list blocks
|
|
- whatever various modules and libraries allocate
|
|
*/
|
|
|
|
PyGrammar_RemoveAccelerators(&_PyParser_Grammar);
|
|
|
|
/* Cleanup auto-thread-state */
|
|
#ifdef WITH_THREAD
|
|
_PyGILState_Fini();
|
|
#endif /* WITH_THREAD */
|
|
|
|
/* Delete current thread. After this, many C API calls become crashy. */
|
|
PyThreadState_Swap(NULL);
|
|
|
|
PyInterpreterState_Delete(interp);
|
|
|
|
#ifdef Py_TRACE_REFS
|
|
/* Display addresses (& refcnts) of all objects still alive.
|
|
* An address can be used to find the repr of the object, printed
|
|
* above by _Py_PrintReferences.
|
|
*/
|
|
if (Py_GETENV("PYTHONDUMPREFS"))
|
|
_Py_PrintReferenceAddresses(stderr);
|
|
#endif /* Py_TRACE_REFS */
|
|
#ifdef WITH_PYMALLOC
|
|
if (_PyMem_PymallocEnabled()) {
|
|
char *opt = Py_GETENV("PYTHONMALLOCSTATS");
|
|
if (opt != NULL && *opt != '\0')
|
|
_PyObject_DebugMallocStats(stderr);
|
|
}
|
|
#endif
|
|
|
|
call_ll_exitfuncs();
|
|
return status;
|
|
}
|
|
|
|
void
|
|
Py_Finalize(void)
|
|
{
|
|
Py_FinalizeEx();
|
|
}
|
|
|
|
/* Create and initialize a new interpreter and thread, and return the
|
|
new thread. This requires that Py_Initialize() has been called
|
|
first.
|
|
|
|
Unsuccessful initialization yields a NULL pointer. Note that *no*
|
|
exception information is available even in this case -- the
|
|
exception information is held in the thread, and there is no
|
|
thread.
|
|
|
|
Locking: as above.
|
|
|
|
*/
|
|
|
|
PyThreadState *
|
|
Py_NewInterpreter(void)
|
|
{
|
|
PyInterpreterState *interp;
|
|
PyThreadState *tstate, *save_tstate;
|
|
PyObject *bimod, *sysmod;
|
|
|
|
if (!initialized)
|
|
Py_FatalError("Py_NewInterpreter: call Py_Initialize first");
|
|
|
|
#ifdef WITH_THREAD
|
|
/* Issue #10915, #15751: The GIL API doesn't work with multiple
|
|
interpreters: disable PyGILState_Check(). */
|
|
_PyGILState_check_enabled = 0;
|
|
#endif
|
|
|
|
interp = PyInterpreterState_New();
|
|
if (interp == NULL)
|
|
return NULL;
|
|
|
|
tstate = PyThreadState_New(interp);
|
|
if (tstate == NULL) {
|
|
PyInterpreterState_Delete(interp);
|
|
return NULL;
|
|
}
|
|
|
|
save_tstate = PyThreadState_Swap(tstate);
|
|
|
|
/* XXX The following is lax in error checking */
|
|
|
|
interp->modules = PyDict_New();
|
|
|
|
bimod = _PyImport_FindBuiltin("builtins");
|
|
if (bimod != NULL) {
|
|
interp->builtins = PyModule_GetDict(bimod);
|
|
if (interp->builtins == NULL)
|
|
goto handle_error;
|
|
Py_INCREF(interp->builtins);
|
|
}
|
|
else if (PyErr_Occurred()) {
|
|
goto handle_error;
|
|
}
|
|
|
|
/* initialize builtin exceptions */
|
|
_PyExc_Init(bimod);
|
|
|
|
sysmod = _PyImport_FindBuiltin("sys");
|
|
if (bimod != NULL && sysmod != NULL) {
|
|
PyObject *pstderr;
|
|
|
|
interp->sysdict = PyModule_GetDict(sysmod);
|
|
if (interp->sysdict == NULL)
|
|
goto handle_error;
|
|
Py_INCREF(interp->sysdict);
|
|
PySys_SetPath(Py_GetPath());
|
|
PyDict_SetItemString(interp->sysdict, "modules",
|
|
interp->modules);
|
|
/* 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)
|
|
Py_FatalError("Py_Initialize: can't set preliminary stderr");
|
|
_PySys_SetObjectId(&PyId_stderr, pstderr);
|
|
PySys_SetObject("__stderr__", pstderr);
|
|
Py_DECREF(pstderr);
|
|
|
|
_PyImportHooks_Init();
|
|
|
|
import_init(interp, sysmod);
|
|
|
|
if (initfsencoding(interp) < 0)
|
|
goto handle_error;
|
|
|
|
if (initstdio() < 0)
|
|
Py_FatalError(
|
|
"Py_Initialize: can't initialize sys standard streams");
|
|
initmain(interp);
|
|
if (!Py_NoSiteFlag)
|
|
initsite();
|
|
}
|
|
|
|
if (!PyErr_Occurred())
|
|
return tstate;
|
|
|
|
handle_error:
|
|
/* Oops, it didn't work. Undo it all. */
|
|
|
|
PyErr_PrintEx(0);
|
|
PyThreadState_Clear(tstate);
|
|
PyThreadState_Swap(save_tstate);
|
|
PyThreadState_Delete(tstate);
|
|
PyInterpreterState_Delete(interp);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/* Delete an interpreter and its last thread. This requires that the
|
|
given thread state is current, that the thread has no remaining
|
|
frames, and that it is its interpreter's only remaining thread.
|
|
It is a fatal error to violate these constraints.
|
|
|
|
(Py_FinalizeEx() doesn't have these constraints -- it zaps
|
|
everything, regardless.)
|
|
|
|
Locking: as above.
|
|
|
|
*/
|
|
|
|
void
|
|
Py_EndInterpreter(PyThreadState *tstate)
|
|
{
|
|
PyInterpreterState *interp = tstate->interp;
|
|
|
|
if (tstate != PyThreadState_GET())
|
|
Py_FatalError("Py_EndInterpreter: thread is not current");
|
|
if (tstate->frame != NULL)
|
|
Py_FatalError("Py_EndInterpreter: thread still has a frame");
|
|
|
|
wait_for_thread_shutdown();
|
|
|
|
if (tstate != interp->tstate_head || tstate->next != NULL)
|
|
Py_FatalError("Py_EndInterpreter: not the last thread");
|
|
|
|
PyImport_Cleanup();
|
|
PyInterpreterState_Clear(interp);
|
|
PyThreadState_Swap(NULL);
|
|
PyInterpreterState_Delete(interp);
|
|
}
|
|
|
|
#ifdef MS_WINDOWS
|
|
static wchar_t *progname = L"python";
|
|
#else
|
|
static wchar_t *progname = L"python3";
|
|
#endif
|
|
|
|
void
|
|
Py_SetProgramName(wchar_t *pn)
|
|
{
|
|
if (pn && *pn)
|
|
progname = pn;
|
|
}
|
|
|
|
wchar_t *
|
|
Py_GetProgramName(void)
|
|
{
|
|
return progname;
|
|
}
|
|
|
|
static wchar_t *default_home = NULL;
|
|
static wchar_t env_home[MAXPATHLEN+1];
|
|
|
|
void
|
|
Py_SetPythonHome(wchar_t *home)
|
|
{
|
|
default_home = home;
|
|
}
|
|
|
|
wchar_t *
|
|
Py_GetPythonHome(void)
|
|
{
|
|
wchar_t *home = default_home;
|
|
if (home == NULL && !Py_IgnoreEnvironmentFlag) {
|
|
char* chome = Py_GETENV("PYTHONHOME");
|
|
if (chome) {
|
|
size_t size = Py_ARRAY_LENGTH(env_home);
|
|
size_t r = mbstowcs(env_home, chome, size);
|
|
if (r != (size_t)-1 && r < size)
|
|
home = env_home;
|
|
}
|
|
|
|
}
|
|
return home;
|
|
}
|
|
|
|
/* Create __main__ module */
|
|
|
|
static void
|
|
initmain(PyInterpreterState *interp)
|
|
{
|
|
PyObject *m, *d, *loader, *ann_dict;
|
|
m = PyImport_AddModule("__main__");
|
|
if (m == NULL)
|
|
Py_FatalError("can't create __main__ module");
|
|
d = PyModule_GetDict(m);
|
|
ann_dict = PyDict_New();
|
|
if ((ann_dict == NULL) ||
|
|
(PyDict_SetItemString(d, "__annotations__", ann_dict) < 0)) {
|
|
Py_FatalError("Failed to initialize __main__.__annotations__");
|
|
}
|
|
Py_DECREF(ann_dict);
|
|
if (PyDict_GetItemString(d, "__builtins__") == NULL) {
|
|
PyObject *bimod = PyImport_ImportModule("builtins");
|
|
if (bimod == NULL) {
|
|
Py_FatalError("Failed to retrieve builtins module");
|
|
}
|
|
if (PyDict_SetItemString(d, "__builtins__", bimod) < 0) {
|
|
Py_FatalError("Failed to initialize __main__.__builtins__");
|
|
}
|
|
Py_DECREF(bimod);
|
|
}
|
|
/* Main is a little special - imp.is_builtin("__main__") will return
|
|
* False, but BuiltinImporter is still the most appropriate initial
|
|
* setting for its __loader__ attribute. A more suitable value will
|
|
* be set if __main__ gets further initialized later in the startup
|
|
* process.
|
|
*/
|
|
loader = PyDict_GetItemString(d, "__loader__");
|
|
if (loader == NULL || loader == Py_None) {
|
|
PyObject *loader = PyObject_GetAttrString(interp->importlib,
|
|
"BuiltinImporter");
|
|
if (loader == NULL) {
|
|
Py_FatalError("Failed to retrieve BuiltinImporter");
|
|
}
|
|
if (PyDict_SetItemString(d, "__loader__", loader) < 0) {
|
|
Py_FatalError("Failed to initialize __main__.__loader__");
|
|
}
|
|
Py_DECREF(loader);
|
|
}
|
|
}
|
|
|
|
static int
|
|
initfsencoding(PyInterpreterState *interp)
|
|
{
|
|
PyObject *codec;
|
|
|
|
#ifdef MS_WINDOWS
|
|
if (Py_LegacyWindowsFSEncodingFlag)
|
|
{
|
|
Py_FileSystemDefaultEncoding = "mbcs";
|
|
Py_FileSystemDefaultEncodeErrors = "replace";
|
|
}
|
|
else
|
|
{
|
|
Py_FileSystemDefaultEncoding = "utf-8";
|
|
Py_FileSystemDefaultEncodeErrors = "surrogatepass";
|
|
}
|
|
#else
|
|
if (Py_FileSystemDefaultEncoding == NULL)
|
|
{
|
|
Py_FileSystemDefaultEncoding = get_locale_encoding();
|
|
if (Py_FileSystemDefaultEncoding == NULL)
|
|
Py_FatalError("Py_Initialize: Unable to get the locale encoding");
|
|
Py_HasFileSystemDefaultEncoding = 0;
|
|
interp->fscodec_initialized = 1;
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
/* the encoding is mbcs, utf-8 or ascii */
|
|
codec = _PyCodec_Lookup(Py_FileSystemDefaultEncoding);
|
|
if (!codec) {
|
|
/* Such error can only occurs in critical situations: no more
|
|
* memory, import a module of the standard library failed,
|
|
* etc. */
|
|
return -1;
|
|
}
|
|
Py_DECREF(codec);
|
|
interp->fscodec_initialized = 1;
|
|
return 0;
|
|
}
|
|
|
|
/* Import the site module (not into __main__ though) */
|
|
|
|
static void
|
|
initsite(void)
|
|
{
|
|
PyObject *m;
|
|
m = PyImport_ImportModule("site");
|
|
if (m == NULL) {
|
|
fprintf(stderr, "Failed to import the site module\n");
|
|
PyErr_Print();
|
|
Py_Finalize();
|
|
exit(1);
|
|
}
|
|
else {
|
|
Py_DECREF(m);
|
|
}
|
|
}
|
|
|
|
/* Check if a file descriptor is valid or not.
|
|
Return 0 if the file descriptor is invalid, return non-zero otherwise. */
|
|
static int
|
|
is_valid_fd(int fd)
|
|
{
|
|
if (IsWindows()) {
|
|
return __isfdopen(fd);
|
|
}
|
|
if (IsXnu()) {
|
|
/* bpo-30225: On macOS Tiger, when stdout is redirected to a pipe
|
|
and the other side of the pipe is closed, dup(1) succeed, whereas
|
|
fstat(1, &st) fails with EBADF. Prefer fstat() over dup() to detect
|
|
such error. */
|
|
struct stat st;
|
|
return (fstat(fd, &st) == 0);
|
|
}
|
|
int fd2;
|
|
if (fd < 0)
|
|
return 0;
|
|
_Py_BEGIN_SUPPRESS_IPH
|
|
/* Prefer dup() over fstat(). fstat() can require input/output whereas
|
|
dup() doesn't, there is a low risk of EMFILE/ENFILE at Python
|
|
startup. */
|
|
fd2 = dup(fd);
|
|
if (fd2 >= 0)
|
|
close(fd2);
|
|
_Py_END_SUPPRESS_IPH
|
|
return fd2 >= 0;
|
|
}
|
|
|
|
/* returns Py_None if the fd is not valid */
|
|
static PyObject*
|
|
create_stdio(PyObject* io,
|
|
int fd, int write_mode, const char* name,
|
|
const char* encoding, const char* errors)
|
|
{
|
|
PyObject *buf = NULL, *stream = NULL, *text = NULL, *raw = NULL, *res;
|
|
const char* mode;
|
|
const char* newline;
|
|
PyObject *line_buffering;
|
|
int buffering, isatty;
|
|
_Py_IDENTIFIER(open);
|
|
_Py_IDENTIFIER(isatty);
|
|
_Py_IDENTIFIER(TextIOWrapper);
|
|
_Py_IDENTIFIER(mode);
|
|
|
|
if (!is_valid_fd(fd))
|
|
Py_RETURN_NONE;
|
|
|
|
/* stdin is always opened in buffered mode, first because it shouldn't
|
|
make a difference in common use cases, second because TextIOWrapper
|
|
depends on the presence of a read1() method which only exists on
|
|
buffered streams.
|
|
*/
|
|
if (Py_UnbufferedStdioFlag && write_mode)
|
|
buffering = 0;
|
|
else
|
|
buffering = -1;
|
|
if (write_mode)
|
|
mode = "wb";
|
|
else
|
|
mode = "rb";
|
|
buf = _PyObject_CallMethodId(io, &PyId_open, "isiOOOi",
|
|
fd, mode, buffering,
|
|
Py_None, Py_None, /* encoding, errors */
|
|
Py_None, 0); /* newline, closefd */
|
|
if (buf == NULL)
|
|
goto error;
|
|
|
|
if (buffering) {
|
|
_Py_IDENTIFIER(raw);
|
|
raw = _PyObject_GetAttrId(buf, &PyId_raw);
|
|
if (raw == NULL)
|
|
goto error;
|
|
}
|
|
else {
|
|
raw = buf;
|
|
Py_INCREF(raw);
|
|
}
|
|
|
|
#ifdef MS_WINDOWS
|
|
/* Windows console IO is always UTF-8 encoded */
|
|
if (PyWindowsConsoleIO_Check(raw))
|
|
encoding = "utf-8";
|
|
#endif
|
|
|
|
text = PyUnicode_FromString(name);
|
|
if (text == NULL || _PyObject_SetAttrId(raw, &PyId_name, text) < 0)
|
|
goto error;
|
|
res = _PyObject_CallMethodId(raw, &PyId_isatty, NULL);
|
|
if (res == NULL)
|
|
goto error;
|
|
isatty = PyObject_IsTrue(res);
|
|
Py_DECREF(res);
|
|
if (isatty == -1)
|
|
goto error;
|
|
if (isatty || Py_UnbufferedStdioFlag)
|
|
line_buffering = Py_True;
|
|
else
|
|
line_buffering = Py_False;
|
|
|
|
Py_CLEAR(raw);
|
|
Py_CLEAR(text);
|
|
|
|
#ifdef MS_WINDOWS
|
|
/* sys.stdin: enable universal newline mode, translate "\r\n" and "\r"
|
|
newlines to "\n".
|
|
sys.stdout and sys.stderr: translate "\n" to "\r\n". */
|
|
newline = NULL;
|
|
#else
|
|
/* sys.stdin: split lines at "\n".
|
|
sys.stdout and sys.stderr: don't translate newlines (use "\n"). */
|
|
newline = "\n";
|
|
#endif
|
|
|
|
stream = _PyObject_CallMethodId(io, &PyId_TextIOWrapper, "OsssO",
|
|
buf, encoding, errors,
|
|
newline, line_buffering);
|
|
Py_CLEAR(buf);
|
|
if (stream == NULL)
|
|
goto error;
|
|
|
|
if (write_mode)
|
|
mode = "w";
|
|
else
|
|
mode = "r";
|
|
text = PyUnicode_FromString(mode);
|
|
if (!text || _PyObject_SetAttrId(stream, &PyId_mode, text) < 0)
|
|
goto error;
|
|
Py_CLEAR(text);
|
|
return stream;
|
|
|
|
error:
|
|
Py_XDECREF(buf);
|
|
Py_XDECREF(stream);
|
|
Py_XDECREF(text);
|
|
Py_XDECREF(raw);
|
|
|
|
if (PyErr_ExceptionMatches(PyExc_OSError) && !is_valid_fd(fd)) {
|
|
/* Issue #24891: the file descriptor was closed after the first
|
|
is_valid_fd() check was called. Ignore the OSError and set the
|
|
stream to None. */
|
|
PyErr_Clear();
|
|
Py_RETURN_NONE;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize sys.stdin, stdout, stderr and builtins.open */
|
|
static int
|
|
initstdio(void)
|
|
{
|
|
PyObject *iomod = NULL, *wrapper;
|
|
PyObject *bimod = NULL;
|
|
PyObject *m;
|
|
PyObject *std = NULL;
|
|
int status = 0, fd;
|
|
PyObject * encoding_attr;
|
|
char *pythonioencoding = NULL, *encoding, *errors;
|
|
|
|
/* Hack to avoid a nasty recursion issue when Python is invoked
|
|
in verbose mode: pre-import the Latin-1 and UTF-8 codecs */
|
|
if ((m = PyImport_ImportModule("encodings.utf_8")) == NULL) {
|
|
goto error;
|
|
}
|
|
Py_DECREF(m);
|
|
|
|
if (!(m = PyImport_ImportModule("encodings.latin_1"))) {
|
|
goto error;
|
|
}
|
|
Py_DECREF(m);
|
|
|
|
if (!(bimod = PyImport_ImportModule("builtins"))) {
|
|
goto error;
|
|
}
|
|
|
|
if (!(iomod = PyImport_ImportModule("io"))) {
|
|
goto error;
|
|
}
|
|
if (!(wrapper = PyObject_GetAttrString(iomod, "OpenWrapper"))) {
|
|
goto error;
|
|
}
|
|
|
|
/* Set builtins.open */
|
|
if (PyObject_SetAttrString(bimod, "open", wrapper) == -1) {
|
|
Py_DECREF(wrapper);
|
|
goto error;
|
|
}
|
|
Py_DECREF(wrapper);
|
|
|
|
encoding = _Py_StandardStreamEncoding;
|
|
errors = _Py_StandardStreamErrors;
|
|
if (!encoding || !errors) {
|
|
pythonioencoding = Py_GETENV("PYTHONIOENCODING");
|
|
if (pythonioencoding) {
|
|
char *err;
|
|
pythonioencoding = _PyMem_Strdup(pythonioencoding);
|
|
if (pythonioencoding == NULL) {
|
|
PyErr_NoMemory();
|
|
goto error;
|
|
}
|
|
err = strchr(pythonioencoding, ':');
|
|
if (err) {
|
|
*err = '\0';
|
|
err++;
|
|
if (*err && !errors) {
|
|
errors = err;
|
|
}
|
|
}
|
|
if (*pythonioencoding && !encoding) {
|
|
encoding = pythonioencoding;
|
|
}
|
|
}
|
|
if (!errors && !(pythonioencoding && *pythonioencoding)) {
|
|
/* When the LC_CTYPE locale is the POSIX locale ("C locale"),
|
|
stdin and stdout use the surrogateescape error handler by
|
|
default, instead of the strict error handler. */
|
|
char *loc = setlocale(LC_CTYPE, NULL);
|
|
if (loc != NULL && strcmp(loc, "C") == 0)
|
|
errors = "surrogateescape";
|
|
}
|
|
}
|
|
|
|
/* Set sys.stdin */
|
|
fd = fileno(stdin);
|
|
/* Under some conditions stdin, stdout and stderr may not be connected
|
|
* and fileno() may point to an invalid file descriptor. For example
|
|
* GUI apps don't have valid standard streams by default.
|
|
*/
|
|
std = create_stdio(iomod, fd, 0, "<stdin>", encoding, errors);
|
|
if (std == NULL)
|
|
goto error;
|
|
PySys_SetObject("__stdin__", std);
|
|
_PySys_SetObjectId(&PyId_stdin, std);
|
|
Py_DECREF(std);
|
|
|
|
/* Set sys.stdout */
|
|
fd = fileno(stdout);
|
|
std = create_stdio(iomod, fd, 1, "<stdout>", encoding, errors);
|
|
if (std == NULL)
|
|
goto error;
|
|
PySys_SetObject("__stdout__", std);
|
|
_PySys_SetObjectId(&PyId_stdout, std);
|
|
Py_DECREF(std);
|
|
|
|
#if 1 /* Disable this if you have trouble debugging bootstrap stuff */
|
|
/* Set sys.stderr, replaces the preliminary stderr */
|
|
fd = fileno(stderr);
|
|
std = create_stdio(iomod, fd, 1, "<stderr>", encoding, "backslashreplace");
|
|
if (std == NULL)
|
|
goto error;
|
|
|
|
/* Same as hack above, pre-import stderr's codec to avoid recursion
|
|
when import.c tries to write to stderr in verbose mode. */
|
|
encoding_attr = PyObject_GetAttrString(std, "encoding");
|
|
if (encoding_attr != NULL) {
|
|
const char * std_encoding;
|
|
std_encoding = PyUnicode_AsUTF8(encoding_attr);
|
|
if (std_encoding != NULL) {
|
|
PyObject *codec_info = _PyCodec_Lookup(std_encoding);
|
|
Py_XDECREF(codec_info);
|
|
}
|
|
Py_DECREF(encoding_attr);
|
|
}
|
|
PyErr_Clear(); /* Not a fatal error if codec isn't available */
|
|
|
|
if (PySys_SetObject("__stderr__", std) < 0) {
|
|
Py_DECREF(std);
|
|
goto error;
|
|
}
|
|
if (_PySys_SetObjectId(&PyId_stderr, std) < 0) {
|
|
Py_DECREF(std);
|
|
goto error;
|
|
}
|
|
Py_DECREF(std);
|
|
#endif
|
|
|
|
if (0) {
|
|
error:
|
|
status = -1;
|
|
}
|
|
|
|
/* We won't need them anymore. */
|
|
if (_Py_StandardStreamEncoding) {
|
|
PyMem_RawFree(_Py_StandardStreamEncoding);
|
|
_Py_StandardStreamEncoding = NULL;
|
|
}
|
|
if (_Py_StandardStreamErrors) {
|
|
PyMem_RawFree(_Py_StandardStreamErrors);
|
|
_Py_StandardStreamErrors = NULL;
|
|
}
|
|
PyMem_Free(pythonioencoding);
|
|
Py_XDECREF(bimod);
|
|
Py_XDECREF(iomod);
|
|
return status;
|
|
}
|
|
|
|
|
|
static void
|
|
_Py_FatalError_DumpTracebacks(int fd)
|
|
{
|
|
fputc('\n', stderr);
|
|
fflush(stderr);
|
|
|
|
/* display the current Python stack */
|
|
_Py_DumpTracebackThreads(fd, NULL, NULL);
|
|
}
|
|
|
|
/* Print the current exception (if an exception is set) with its traceback,
|
|
or display the current Python stack.
|
|
|
|
Don't call PyErr_PrintEx() and the except hook, because Py_FatalError() is
|
|
called on catastrophic cases.
|
|
|
|
Return 1 if the traceback was displayed, 0 otherwise. */
|
|
|
|
static int
|
|
_Py_FatalError_PrintExc(int fd)
|
|
{
|
|
PyObject *ferr, *res;
|
|
PyObject *exception, *v, *tb;
|
|
int has_tb;
|
|
|
|
PyErr_Fetch(&exception, &v, &tb);
|
|
if (exception == NULL) {
|
|
/* No current exception */
|
|
return 0;
|
|
}
|
|
|
|
ferr = _PySys_GetObjectId(&PyId_stderr);
|
|
if (ferr == NULL || ferr == Py_None) {
|
|
/* sys.stderr is not set yet or set to None,
|
|
no need to try to display the exception */
|
|
return 0;
|
|
}
|
|
|
|
PyErr_NormalizeException(&exception, &v, &tb);
|
|
if (tb == NULL) {
|
|
tb = Py_None;
|
|
Py_INCREF(tb);
|
|
}
|
|
PyException_SetTraceback(v, tb);
|
|
if (exception == NULL) {
|
|
/* PyErr_NormalizeException() failed */
|
|
return 0;
|
|
}
|
|
|
|
has_tb = (tb != Py_None);
|
|
PyErr_Display(exception, v, tb);
|
|
Py_XDECREF(exception);
|
|
Py_XDECREF(v);
|
|
Py_XDECREF(tb);
|
|
|
|
/* sys.stderr may be buffered: call sys.stderr.flush() */
|
|
res = _PyObject_CallMethodId(ferr, &PyId_flush, NULL);
|
|
if (res == NULL)
|
|
PyErr_Clear();
|
|
else
|
|
Py_DECREF(res);
|
|
|
|
return has_tb;
|
|
}
|
|
|
|
/* Print fatal error message and abort */
|
|
|
|
void
|
|
Py_FatalError(const char *msg)
|
|
{
|
|
const int fd = fileno(stderr);
|
|
static int reentrant = 0;
|
|
#ifdef MS_WINDOWS
|
|
size_t len;
|
|
WCHAR* buffer;
|
|
size_t i;
|
|
#endif
|
|
|
|
if (reentrant) {
|
|
/* Py_FatalError() caused a second fatal error.
|
|
Example: flush_std_files() raises a recursion error. */
|
|
goto exit;
|
|
}
|
|
reentrant = 1;
|
|
|
|
fprintf(stderr, "Fatal Python error: %s\n", msg);
|
|
fflush(stderr); /* it helps in Windows debug build */
|
|
|
|
/* Check if the current thread has a Python thread state
|
|
and holds the GIL */
|
|
PyThreadState *tss_tstate = NULL; // PyGILState_GetThisThreadState();
|
|
if (tss_tstate != NULL) {
|
|
PyThreadState *tstate = PyThreadState_GET();
|
|
if (tss_tstate != tstate) {
|
|
/* The Python thread does not hold the GIL */
|
|
tss_tstate = NULL;
|
|
}
|
|
}
|
|
else {
|
|
/* Py_FatalError() has been called from a C thread
|
|
which has no Python thread state. */
|
|
}
|
|
int has_tstate_and_gil = (tss_tstate != NULL);
|
|
|
|
if (has_tstate_and_gil) {
|
|
/* If an exception is set, print the exception with its traceback */
|
|
if (!_Py_FatalError_PrintExc(fd)) {
|
|
/* No exception is set, or an exception is set without traceback */
|
|
_Py_FatalError_DumpTracebacks(fd);
|
|
}
|
|
}
|
|
else {
|
|
_Py_FatalError_DumpTracebacks(fd);
|
|
}
|
|
|
|
/* The main purpose of faulthandler is to display the traceback. We already
|
|
* did our best to display it. So faulthandler can now be disabled.
|
|
* (Don't trigger it on abort().) */
|
|
_PyFaulthandler_Fini();
|
|
|
|
/* Check if the current Python thread hold the GIL */
|
|
if (has_tstate_and_gil) {
|
|
/* Flush sys.stdout and sys.stderr */
|
|
flush_std_files();
|
|
}
|
|
|
|
#ifdef MS_WINDOWS
|
|
len = strlen(msg);
|
|
|
|
/* Convert the message to wchar_t. This uses a simple one-to-one
|
|
conversion, assuming that the this error message actually uses ASCII
|
|
only. If this ceases to be true, we will have to convert. */
|
|
buffer = alloca( (len+1) * (sizeof *buffer));
|
|
for( i=0; i<=len; ++i)
|
|
buffer[i] = msg[i];
|
|
OutputDebugStringW(L"Fatal Python error: ");
|
|
OutputDebugStringW(buffer);
|
|
OutputDebugStringW(L"\n");
|
|
#endif /* MS_WINDOWS */
|
|
|
|
exit:
|
|
#if defined(MS_WINDOWS) && defined(_DEBUG)
|
|
DebugBreak();
|
|
#endif
|
|
__die();
|
|
}
|
|
|
|
/* Clean up and exit */
|
|
|
|
#ifdef WITH_THREAD
|
|
#include "third_party/python/Include/pythread.h"
|
|
#endif
|
|
|
|
static void (*pyexitfunc)(void) = NULL;
|
|
/* For the atexit module. */
|
|
void _Py_PyAtExit(void (*func)(void))
|
|
{
|
|
pyexitfunc = func;
|
|
}
|
|
|
|
static void
|
|
call_py_exitfuncs(void)
|
|
{
|
|
if (pyexitfunc == NULL)
|
|
return;
|
|
|
|
(*pyexitfunc)();
|
|
PyErr_Clear();
|
|
}
|
|
|
|
/* Wait until threading._shutdown completes, provided
|
|
the threading module was imported in the first place.
|
|
The shutdown routine will wait until all non-daemon
|
|
"threading" threads have completed. */
|
|
static void
|
|
wait_for_thread_shutdown(void)
|
|
{
|
|
#ifdef WITH_THREAD
|
|
_Py_IDENTIFIER(_shutdown);
|
|
PyObject *result;
|
|
PyThreadState *tstate = PyThreadState_GET();
|
|
PyObject *threading = PyMapping_GetItemString(tstate->interp->modules,
|
|
"threading");
|
|
if (threading == NULL) {
|
|
/* threading not imported */
|
|
PyErr_Clear();
|
|
return;
|
|
}
|
|
result = _PyObject_CallMethodId(threading, &PyId__shutdown, NULL);
|
|
if (result == NULL) {
|
|
PyErr_WriteUnraisable(threading);
|
|
}
|
|
else {
|
|
Py_DECREF(result);
|
|
}
|
|
Py_DECREF(threading);
|
|
#endif
|
|
}
|
|
|
|
#define NEXITFUNCS 32
|
|
static void (*exitfuncs[NEXITFUNCS])(void);
|
|
static int nexitfuncs = 0;
|
|
|
|
int Py_AtExit(void (*func)(void))
|
|
{
|
|
if (nexitfuncs >= NEXITFUNCS)
|
|
return -1;
|
|
exitfuncs[nexitfuncs++] = func;
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
call_ll_exitfuncs(void)
|
|
{
|
|
while (nexitfuncs > 0)
|
|
(*exitfuncs[--nexitfuncs])();
|
|
|
|
fflush(stdout);
|
|
fflush(stderr);
|
|
}
|
|
|
|
void
|
|
Py_Exit(int sts)
|
|
{
|
|
if (Py_FinalizeEx() < 0) {
|
|
sts = 120;
|
|
}
|
|
|
|
exit(sts);
|
|
}
|
|
|
|
static void
|
|
initsigs(void)
|
|
{
|
|
#ifdef SIGPIPE
|
|
PyOS_setsig(SIGPIPE, SIG_IGN);
|
|
#endif
|
|
#ifdef SIGXFZ
|
|
PyOS_setsig(SIGXFZ, SIG_IGN);
|
|
#endif
|
|
#ifdef SIGXFSZ
|
|
PyOS_setsig(SIGXFSZ, SIG_IGN);
|
|
#endif
|
|
PyOS_InitInterrupts(); /* May imply initsignal() */
|
|
if (PyErr_Occurred()) {
|
|
Py_FatalError("Py_Initialize: can't import signal");
|
|
}
|
|
}
|
|
|
|
|
|
/* Restore signals that the interpreter has called SIG_IGN on to SIG_DFL.
|
|
*
|
|
* All of the code in this function must only use async-signal-safe functions,
|
|
* listed at `man 7 signal` or
|
|
* http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html.
|
|
*/
|
|
void
|
|
_Py_RestoreSignals(void)
|
|
{
|
|
#ifdef SIGPIPE
|
|
PyOS_setsig(SIGPIPE, SIG_DFL);
|
|
#endif
|
|
#ifdef SIGXFZ
|
|
PyOS_setsig(SIGXFZ, SIG_DFL);
|
|
#endif
|
|
#ifdef SIGXFSZ
|
|
PyOS_setsig(SIGXFSZ, SIG_DFL);
|
|
#endif
|
|
}
|
|
|
|
|
|
/*
|
|
* The file descriptor fd is considered ``interactive'' if either
|
|
* a) isatty(fd) is TRUE, or
|
|
* b) the -i flag was given, and the filename associated with
|
|
* the descriptor is NULL or "<stdin>" or "???".
|
|
*/
|
|
int
|
|
Py_FdIsInteractive(FILE *fp, const char *filename)
|
|
{
|
|
if (isatty((int)fileno(fp)))
|
|
return 1;
|
|
if (!Py_InteractiveFlag)
|
|
return 0;
|
|
return (filename == NULL) ||
|
|
(strcmp(filename, "<stdin>") == 0) ||
|
|
(strcmp(filename, "???") == 0);
|
|
}
|
|
|
|
|
|
/* Wrappers around sigaction() or signal(). */
|
|
|
|
PyOS_sighandler_t
|
|
PyOS_getsig(int sig)
|
|
{
|
|
#ifdef HAVE_SIGACTION
|
|
struct sigaction context;
|
|
if (sigaction(sig, NULL, &context) == -1)
|
|
return SIG_ERR;
|
|
return context.sa_handler;
|
|
#else
|
|
PyOS_sighandler_t handler;
|
|
/* Special signal handling for the secure CRT in Visual Studio 2005 */
|
|
#if defined(_MSC_VER) && _MSC_VER >= 1400
|
|
switch (sig) {
|
|
/* Only these signals are valid */
|
|
case SIGINT:
|
|
case SIGILL:
|
|
case SIGFPE:
|
|
case SIGSEGV:
|
|
case SIGTERM:
|
|
case SIGBREAK:
|
|
case SIGABRT:
|
|
break;
|
|
/* Don't call signal() with other values or it will assert */
|
|
default:
|
|
return SIG_ERR;
|
|
}
|
|
#endif /* _MSC_VER && _MSC_VER >= 1400 */
|
|
handler = signal(sig, SIG_IGN);
|
|
if (handler != SIG_ERR)
|
|
signal(sig, handler);
|
|
return handler;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* All of the code in this function must only use async-signal-safe functions,
|
|
* listed at `man 7 signal` or
|
|
* http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_04.html.
|
|
*/
|
|
PyOS_sighandler_t
|
|
PyOS_setsig(int sig, PyOS_sighandler_t handler)
|
|
{
|
|
#ifdef HAVE_SIGACTION
|
|
/* Some code in Modules/signalmodule.c depends on sigaction() being
|
|
* used here if HAVE_SIGACTION is defined. Fix that if this code
|
|
* changes to invalidate that assumption.
|
|
*/
|
|
struct sigaction context, ocontext;
|
|
context.sa_handler = handler;
|
|
sigemptyset(&context.sa_mask);
|
|
context.sa_flags = 0;
|
|
if (sigaction(sig, &context, &ocontext) == -1)
|
|
return SIG_ERR;
|
|
return ocontext.sa_handler;
|
|
#else
|
|
PyOS_sighandler_t oldhandler;
|
|
oldhandler = signal(sig, handler);
|
|
#ifdef HAVE_SIGINTERRUPT
|
|
siginterrupt(sig, 1);
|
|
#endif
|
|
return oldhandler;
|
|
#endif
|
|
}
|