diff options
Diffstat (limited to 'Python/pythonrun.c')
| -rw-r--r-- | Python/pythonrun.c | 1572 |
1 files changed, 17 insertions, 1555 deletions
diff --git a/Python/pythonrun.c b/Python/pythonrun.c index 0967a47c57..ebedd123f3 100644 --- a/Python/pythonrun.c +++ b/Python/pythonrun.c @@ -15,6 +15,7 @@ #include "ast.h" #include "marshal.h" #include "osdefs.h" +#include <locale.h> #ifdef HAVE_SIGNAL_H #include <signal.h> @@ -25,18 +26,12 @@ #endif #ifdef HAVE_LANGINFO_H -#include <locale.h> #include <langinfo.h> #endif #ifdef MS_WINDOWS #undef BYTE #include "windows.h" -#define PATH_MAX MAXPATHLEN -#endif - -#ifdef __gnu_hurd__ -#define PATH_MAX MAXPATHLEN #endif _Py_IDENTIFIER(builtins); @@ -45,7 +40,6 @@ _Py_IDENTIFIER(flush); _Py_IDENTIFIER(last_traceback); _Py_IDENTIFIER(last_type); _Py_IDENTIFIER(last_value); -_Py_IDENTIFIER(name); _Py_IDENTIFIER(ps1); _Py_IDENTIFIER(ps2); _Py_IDENTIFIER(stdin); @@ -53,43 +47,13 @@ _Py_IDENTIFIER(stdout); _Py_IDENTIFIER(stderr); _Py_static_string(PyId_string, "<string>"); -#ifdef Py_REF_DEBUG -static -void _print_total_refs(void) { - PyObject *xoptions, *value; - _Py_IDENTIFIER(showrefcount); - - xoptions = PySys_GetXOptions(); - if (xoptions == NULL) - return; - value = _PyDict_GetItemId(xoptions, &PyId_showrefcount); - if (value == Py_True) - fprintf(stderr, - "[%" PY_FORMAT_SIZE_T "d refs, " - "%" PY_FORMAT_SIZE_T "d blocks]\n", - _Py_GetRefTotal(), _Py_GetAllocatedBlocks()); -} -#endif - -#ifndef Py_REF_DEBUG -#define PRINT_TOTAL_REFS() -#else /* Py_REF_DEBUG */ -#define PRINT_TOTAL_REFS() _print_total_refs() -#endif - #ifdef __cplusplus extern "C" { #endif -extern wchar_t *Py_GetPath(void); - extern grammar _PyParser_Grammar; /* From graminit.c */ /* Forward */ -static void initmain(PyInterpreterState *interp); -static int initfsencoding(PyInterpreterState *interp); -static void initsite(void); -static int initstdio(void); static void flush_io(void); static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *, PyCompilerFlags *, PyArena *); @@ -97,1177 +61,6 @@ static PyObject *run_pyc_file(FILE *, const char *, PyObject *, PyObject *, PyCompilerFlags *); static void err_input(perrdetail *); static void err_free(perrdetail *); -static void initsigs(void); -static void call_py_exitfuncs(void); -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 int _PyFaulthandler_Init(void); -extern void _PyFaulthandler_Fini(void); -extern void _PyHash_Fini(void); -extern int _PyTraceMalloc_Init(void); -extern int _PyTraceMalloc_Fini(void); - -#ifdef WITH_THREAD -extern void _PyGILState_Init(PyInterpreterState *, PyThreadState *); -extern void _PyGILState_Fini(void); -#endif /* WITH_THREAD */ - -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_NoSiteFlag; /* Suppress 'import site' */ -int Py_BytesWarningFlag; /* Warn on str(bytes) and str(buffer) */ -int Py_DontWriteBytecodeFlag; /* Suppress writing bytecode files (*.py[co]) */ -int Py_UseClassExceptionsFlag = 1; /* Needed by bltinmodule.c: deprecated */ -int Py_FrozenFlag; /* Needed by getpath.c */ -int Py_IgnoreEnvironmentFlag; /* e.g. PYTHONPATH, PYTHONHOME */ -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 */ - -PyThreadState *_Py_Finalizing = NULL; - -/* Hack to force loading of object files */ -int (*_PyOS_mystrnicmp_hack)(const char *, const char *, Py_ssize_t) = \ - PyOS_mystrnicmp; /* Python/pystrcmp.o */ - -/* PyModule_GetWarningsModule is no longer necessary as of 2.6 -since _warnings is builtin. This API should not be used. */ -PyObject * -PyModule_GetWarningsModule(void) -{ - return PyImport_ImportModule("warnings"); -} - -static int initialized = 0; - -/* API to access the initialized flag -- useful for esoteric use */ - -int -Py_IsInitialized(void) -{ - return 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; - } - } - return 0; -} - -/* Global initializations. Can be undone by Py_Finalize(). Don't - call this twice without an intervening Py_Finalize() 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 int -add_flag(int flag, const char *envs) -{ - int env = atoi(envs); - if (flag < env) - flag = env; - if (flag < 1) - flag = 1; - return flag; -} - -static char* -get_codec_name(const char *encoding) -{ - char *name_utf8, *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_AsString(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) -{ -#ifdef MS_WINDOWS - char codepage[100]; - PyOS_snprintf(codepage, sizeof(codepage), "cp%d", GetACP()); - return get_codec_name(codepage); -#elif 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); -#else - PyErr_SetNone(PyExc_NotImplementedError); - return NULL; -#endif -} - -static void -import_init(PyInterpreterState *interp, PyObject *sysmod) -{ - PyObject *importlib; - PyObject *impmod; - PyObject *sys_modules; - PyObject *value; - - /* Import _importlib through its frozen version, _frozen_importlib. */ - if (PyImport_ImportFrozenModule("_frozen_importlib") <= 0) { - Py_FatalError("Py_Initialize: can't import _frozen_importlib"); - } - else if (Py_VerboseFlag) { - PySys_FormatStderr("import _frozen_importlib # frozen\n"); - } - importlib = PyImport_AddModule("_frozen_importlib"); - if (importlib == NULL) { - Py_FatalError("Py_Initialize: couldn't get _frozen_importlib from " - "sys.modules"); - } - interp->importlib = importlib; - Py_INCREF(interp->importlib); - - /* Install _importlib as __import__ */ - impmod = PyInit_imp(); - if (impmod == NULL) { - Py_FatalError("Py_Initialize: can't import imp"); - } - else if (Py_VerboseFlag) { - 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"); - } - - 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); - - _PyImportZip_Init(); -} - - -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; - -#if defined(HAVE_LANGINFO_H) && defined(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); - /* The variable is only tested for existence here; _PyRandom_Init will - check its value further. */ - if ((p = Py_GETENV("PYTHONHASHSEED")) && *p != '\0') - Py_HashRandomizationFlag = add_flag(Py_HashRandomizationFlag, p); - - _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_Finalize 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_Finalize 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; - - import_init(interp, sysmod); - - /* initialize the faulthandler module */ - if (_PyFaulthandler_Init()) - Py_FatalError("Py_Initialize: can't initialize faulthandler"); - - _PyTime_Init(); - - 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 void -flush_std_files(void) -{ - PyObject *fout = _PySys_GetObjectId(&PyId_stdout); - PyObject *ferr = _PySys_GetObjectId(&PyId_stderr); - PyObject *tmp; - - if (fout != NULL && fout != Py_None && !file_is_closed(fout)) { - tmp = _PyObject_CallMethodId(fout, &PyId_flush, ""); - if (tmp == NULL) - PyErr_WriteUnraisable(fout); - else - Py_DECREF(tmp); - } - - if (ferr != NULL && ferr != Py_None && !file_is_closed(ferr)) { - tmp = _PyObject_CallMethodId(ferr, &PyId_flush, ""); - if (tmp == NULL) - PyErr_Clear(); - else - Py_DECREF(tmp); - } -} - -/* 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. - -*/ - -void -Py_Finalize(void) -{ - PyInterpreterState *interp; - PyThreadState *tstate; - - if (!initialized) - return; - - 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 */ - flush_std_files(); - - /* 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_Collect(); -#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_Collect() > 0) - /* nothing */; -#endif - /* Destroy all modules */ - PyImport_Cleanup(); - - /* Flush sys.stdout and sys.stderr (again, in case more was printed) */ - flush_std_files(); - - /* 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_Collect(); -#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(stdout); -#endif - /* dump hash stats */ - _PyHash_Fini(); - - 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(); - - /* 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 PYMALLOC_DEBUG - if (Py_GETENV("PYTHONMALLOCSTATS")) - _PyObject_DebugMallocStats(stderr); -#endif - - call_ll_exitfuncs(); -} - -/* 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"); - - 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); - } - - /* 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_Finalize() 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; - m = PyImport_AddModule("__main__"); - if (m == NULL) - Py_FatalError("can't create __main__ module"); - d = PyModule_GetDict(m); - 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; - - 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; - } - - /* 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) -{ - int fd2; - if (fd < 0 || !_PyVerify_fd(fd)) - return 0; - fd2 = dup(fd); - if (fd2 >= 0) - close(fd2); - return fd2 >= 0; -} - -/* returns Py_None if the fd is not valid */ -static PyObject* -create_stdio(PyObject* io, - int fd, int write_mode, char* name, - char* encoding, 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, Py_None, 0); - 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); - } - - text = PyUnicode_FromString(name); - if (text == NULL || _PyObject_SetAttrId(raw, &PyId_name, text) < 0) - goto error; - res = _PyObject_CallMethodId(raw, &PyId_isatty, ""); - 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; - } - } - } - - /* 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_AsString(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; -} /* Parse input from a file and execute it */ @@ -1317,7 +110,7 @@ PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags * err = -1; for (;;) { ret = PyRun_InteractiveOneObject(fp, filename, flags); - PRINT_TOTAL_REFS(); + _PY_DEBUG_PRINT_TOTAL_REFS(); if (ret == E_EOF) { err = 0; break; @@ -1472,7 +265,7 @@ PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *f static int maybe_pyc_file(FILE *fp, const char* filename, const char* ext, int closeit) { - if (strcmp(ext, ".pyc") == 0 || strcmp(ext, ".pyo") == 0) + if (strcmp(ext, ".pyc") == 0) return 1; /* Only look into the file if we are allowed to close it, since @@ -1511,7 +304,7 @@ set_main_loader(PyObject *d, const char *filename, const char *loader_name) { PyInterpreterState *interp; PyThreadState *tstate; - PyObject *filename_obj, *loader_type, *loader; + PyObject *filename_obj, *bootstrap, *loader_type = NULL, *loader; int result = 0; filename_obj = PyUnicode_DecodeFSDefault(filename); @@ -1520,7 +313,12 @@ set_main_loader(PyObject *d, const char *filename, const char *loader_name) /* Get current thread state and interpreter pointer */ tstate = PyThreadState_GET(); interp = tstate->interp; - loader_type = PyObject_GetAttrString(interp->importlib, loader_name); + bootstrap = PyObject_GetAttrString(interp->importlib, + "_bootstrap_external"); + if (bootstrap != NULL) { + loader_type = PyObject_GetAttrString(bootstrap, loader_name); + Py_DECREF(bootstrap); + } if (loader_type == NULL) { Py_DECREF(filename_obj); return -1; @@ -1578,9 +376,6 @@ PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit, fprintf(stderr, "python: Can't reopen .pyc file\n"); goto done; } - /* Turn on optimization if a .pyo file is given */ - if (strcmp(ext, ".pyo") == 0) - Py_OptimizeFlag = 1; if (set_main_loader(d, filename, "SourcelessFileLoader") < 0) { fprintf(stderr, "python: failed to set __main__.__loader__\n"); @@ -1724,7 +519,7 @@ print_error_text(PyObject *f, int offset, PyObject *text_obj) return; if (offset >= 0) { - if (offset > 0 && offset == strlen(text) && text[offset - 1] == '\n') + if (offset > 0 && (size_t)offset == strlen(text) && text[offset - 1] == '\n') offset--; for (;;) { nl = strchr(text, '\n'); @@ -2188,13 +983,17 @@ run_pyc_file(FILE *fp, const char *filename, PyObject *globals, magic = PyMarshal_ReadLongFromFile(fp); if (magic != PyImport_GetMagicNumber()) { - PyErr_SetString(PyExc_RuntimeError, - "Bad magic number in .pyc file"); + if (!PyErr_Occurred()) + PyErr_SetString(PyExc_RuntimeError, + "Bad magic number in .pyc file"); return NULL; } /* Skip mtime and size */ (void) PyMarshal_ReadLongFromFile(fp); (void) PyMarshal_ReadLongFromFile(fp); + if (PyErr_Occurred()) + return NULL; + v = PyMarshal_ReadLastObjectFromFile(fp); if (v == NULL || !PyCode_Check(v)) { Py_XDECREF(v); @@ -2582,276 +1381,6 @@ cleanup: } } -/* 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. */ - -static void -_Py_PrintFatalError(int fd) -{ - PyObject *ferr, *res; - PyObject *exception, *v, *tb; - int has_tb; - PyThreadState *tstate; - - PyErr_Fetch(&exception, &v, &tb); - if (exception == NULL) { - /* No current exception */ - goto display_stack; - } - - 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 */ - goto display_stack; - } - - PyErr_NormalizeException(&exception, &v, &tb); - if (tb == NULL) { - tb = Py_None; - Py_INCREF(tb); - } - PyException_SetTraceback(v, tb); - if (exception == NULL) { - /* PyErr_NormalizeException() failed */ - goto display_stack; - } - - has_tb = (tb != NULL && 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, ""); - if (res == NULL) - PyErr_Clear(); - else - Py_DECREF(res); - - if (has_tb) - return; - -display_stack: -#ifdef WITH_THREAD - /* PyGILState_GetThisThreadState() works even if the GIL was released */ - tstate = PyGILState_GetThisThreadState(); -#else - tstate = PyThreadState_GET(); -#endif - if (tstate == NULL) { - /* _Py_DumpTracebackThreads() requires the thread state to display - * frames */ - return; - } - - fputc('\n', stderr); - fflush(stderr); - - /* display the current Python stack */ - _Py_DumpTracebackThreads(fd, tstate->interp, tstate); -} - -/* 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 */ - - /* Print the exception (if an exception is set) with its traceback, - * or display the current Python stack. */ - _Py_PrintFatalError(fd); - - /* Flush sys.stdout and sys.stderr */ - flush_std_files(); - - /* 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(); - -#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 - abort(); -} - -/* Clean up and exit */ - -#ifdef WITH_THREAD -#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, ""); - 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) -{ - Py_Finalize(); - - 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); -} - #if defined(USE_STACKCHECK) #if defined(WIN32) && defined(_MSC_VER) @@ -2890,73 +1419,6 @@ PyOS_CheckStack(void) #endif /* USE_STACKCHECK */ - -/* 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 -} - /* Deprecated C API functions still provided for binary compatiblity */ #undef PyParser_SimpleParseFile |