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GeezerVison is showing github.com — cpython/Python/pythonrun.c at main · python/cpython Expand file tree/ Copy pathpythonrun.cMore file actions 1810 lines (1606 loc) · 47.3 KB / Copy pathpythonrun.cFile metadata and controls1810 lines (1606 loc) · 47.3 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 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964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /* Top level execution of Python code (including in __main__) */ /* To help control the interfaces between the startup, execution and * shutdown code, the phases are split across separate modules (bootstrap, * pythonrun, shutdown) */ /* TODO: Cull includes following phase split */ #include "Python.h" #include "pycore_ast.h" // PyAST_mod2obj() #include "pycore_audit.h" // _PySys_Audit() #include "pycore_ceval.h" // _Py_EnterRecursiveCall() #include "pycore_compile.h" // _PyAST_Compile() #include "pycore_fileutils.h" // _PyFile_Flush #include "pycore_import.h" // _PyImport_GetImportlibExternalLoader() #include "pycore_interp.h" // PyInterpreterState.importlib #include "pycore_object.h" // _PyDebug_PrintTotalRefs() #include "pycore_parser.h" // _PyParser_ASTFromString() #include "pycore_pyerrors.h" // _PyErr_GetRaisedException() #include "pycore_pylifecycle.h" // _Py_FdIsInteractive() #include "pycore_pystate.h" // _PyInterpreterState_GET() #include "pycore_pythonrun.h" // export _PyRun_AnyFile() #include "pycore_sysmodule.h" // _PySys_SetAttr() #include "pycore_traceback.h" // _PyTraceBack_Print() #include "pycore_unicodeobject.h" // _PyUnicode_Equal() #include "errcode.h" // E_EOF #include "marshal.h" // PyMarshal_ReadLongFromFile() #include <stdbool.h> #ifdef MS_WINDOWS # include "malloc.h" // alloca() #endif #ifdef MS_WINDOWS # undef BYTE # include "windows.h" #endif /* Forward declarations */ static void flush_io(void); static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *, PyCompilerFlags *, PyArena *, PyObject*, int); static PyObject *run_pyc_file(FILE *, PyObject *, PyObject *, PyCompilerFlags *); static PyObject * _PyRun_String(const char *str, PyObject* name, int start, PyObject *globals, PyObject *locals, PyCompilerFlags *flags, int generate_new_source); static PyObject* _PyRun_InteractiveLoop(FILE *fp, PyObject *filename, PyCompilerFlags *flags); static int _PyRun_InteractiveOne(FILE *fp, PyObject *filename, PyCompilerFlags *flags); static PyObject * _PyRun_File(FILE *fp, PyObject *filename, int start, PyObject *globals, PyObject *locals, int closeit, PyCompilerFlags *flags); // See also pymain_error() static void pyrun_error(const char *msg) { PySys_FormatStderr("python: %s\n", msg); } PyObject* _PyRun_AnyFile(FILE *fp, PyObject *filename, int closeit, PyCompilerFlags *flags) { int decref_filename = 0; if (filename == NULL) { filename = PyUnicode_FromString("???"); if (filename == NULL) { return NULL; } decref_filename = 1; } PyObject *result; if (_Py_FdIsInteractive(fp, filename)) { result = _PyRun_InteractiveLoop(fp, filename, flags); if (closeit) { fclose(fp); } } else { result = _PyRun_SimpleFile(fp, filename, closeit, flags); } if (decref_filename) { Py_DECREF(filename); } return result; } int PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit, PyCompilerFlags *flags) { PyObject *filename_obj = NULL; if (filename != NULL) { filename_obj = PyUnicode_DecodeFSDefault(filename); if (filename_obj == NULL) { PyErr_Print(); return -1; } } PyObject *result = _PyRun_AnyFile(fp, filename_obj, closeit, flags); Py_XDECREF(filename_obj); if (result == NULL) { PyErr_Print(); return -1; } Py_DECREF(result); return 0; } static PyObject* _PyRun_InteractiveLoop(FILE *fp, PyObject *filename, PyCompilerFlags *flags) { PyCompilerFlags local_flags = _PyCompilerFlags_INIT; if (flags == NULL) { flags = &local_flags; } PyObject *v; if (PySys_GetOptionalAttr(&_Py_ID(ps1), &v) < 0) { return NULL; } if (v == NULL) { v = PyUnicode_FromString(">>> "); if (v == NULL) { PyErr_Clear(); } if (_PySys_SetAttr(&_Py_ID(ps1), v) < 0) { PyErr_Clear(); } } Py_XDECREF(v); if (PySys_GetOptionalAttr(&_Py_ID(ps2), &v) < 0) { return NULL; } if (v == NULL) { v = PyUnicode_FromString("... "); if (v == NULL) { PyErr_Clear(); } if (_PySys_SetAttr(&_Py_ID(ps2), v) < 0) { PyErr_Clear(); } } Py_XDECREF(v); #ifdef Py_REF_DEBUG int show_ref_count = _Py_GetConfig()->show_ref_count; #endif int nomem_count = 0; int ret; do { ret = _PyRun_InteractiveOne(fp, filename, flags); if (ret == -1 && PyErr_Occurred()) { /* Prevent an endless loop after multiple consecutive MemoryErrors * while still allowing an interactive command to fail with a * MemoryError. */ if (PyErr_ExceptionMatches(PyExc_MemoryError)) { if (++nomem_count > 16) { return NULL; } } else { nomem_count = 0; } int inspect = _Py_GetConfig()->inspect; if (!inspect && PyErr_ExceptionMatches(PyExc_SystemExit)) { return NULL; } PyErr_Print(); } else { nomem_count = 0; } #ifdef Py_REF_DEBUG if (show_ref_count) { _PyDebug_PrintTotalRefs(); } #endif } while (ret != E_EOF); Py_RETURN_NONE; } int PyRun_InteractiveLoopFlags(FILE *fp, const char *filename, PyCompilerFlags *flags) { PyObject *filename_obj = PyUnicode_DecodeFSDefault(filename); if (filename_obj == NULL) { PyErr_Print(); return -1; } PyObject *result = _PyRun_InteractiveLoop(fp, filename_obj, flags); Py_DECREF(filename_obj); if (result == NULL) { PyErr_Print(); return -1; } Py_DECREF(result); return 0; } // Call _PyParser_ASTFromFile() with sys.stdin.encoding, sys.ps1 and sys.ps2 static int pyrun_one_parse_ast(FILE *fp, PyObject *filename, PyCompilerFlags *flags, PyArena *arena, mod_ty *pmod, PyObject** interactive_src) { // Get sys.stdin.encoding (as UTF-8) PyObject *attr; PyObject *encoding_obj = NULL; const char *encoding = NULL; if (fp == stdin) { if (PySys_GetOptionalAttr(&_Py_ID(stdin), &attr) < 0) { PyErr_Clear(); } else if (attr != NULL && attr != Py_None) { if (PyObject_GetOptionalAttr(attr, &_Py_ID(encoding), &encoding_obj) < 0) { PyErr_Clear(); } else if (encoding_obj && PyUnicode_Check(encoding_obj)) { encoding = PyUnicode_AsUTF8(encoding_obj); if (!encoding) { PyErr_Clear(); } } } Py_XDECREF(attr); } // Get sys.ps1 (as UTF-8) PyObject *ps1_obj = NULL; const char *ps1 = ""; if (PySys_GetOptionalAttr(&_Py_ID(ps1), &attr) < 0) { PyErr_Clear(); } else if (attr != NULL) { ps1_obj = PyObject_Str(attr); Py_DECREF(attr); if (ps1_obj == NULL) { PyErr_Clear(); } else if (PyUnicode_Check(ps1_obj)) { ps1 = PyUnicode_AsUTF8(ps1_obj); if (ps1 == NULL) { PyErr_Clear(); ps1 = ""; } } } // Get sys.ps2 (as UTF-8) PyObject *ps2_obj = NULL; const char *ps2 = ""; if (PySys_GetOptionalAttr(&_Py_ID(ps2), &attr) < 0) { PyErr_Clear(); } else if (attr != NULL) { ps2_obj = PyObject_Str(attr); Py_DECREF(attr); if (ps2_obj == NULL) { PyErr_Clear(); } else if (PyUnicode_Check(ps2_obj)) { ps2 = PyUnicode_AsUTF8(ps2_obj); if (ps2 == NULL) { PyErr_Clear(); ps2 = ""; } } } int errcode = 0; *pmod = _PyParser_InteractiveASTFromFile(fp, filename, encoding, Py_single_input, ps1, ps2, flags, &errcode, interactive_src, arena); Py_XDECREF(ps1_obj); Py_XDECREF(ps2_obj); Py_XDECREF(encoding_obj); if (*pmod == NULL) { if (errcode == E_EOF) { PyErr_Clear(); return E_EOF; } return -1; } return 0; } /* A PyRun_InteractiveOneObject() auxiliary function that does not print the * error on failure. */ static int _PyRun_InteractiveOne(FILE *fp, PyObject *filename, PyCompilerFlags *flags) { if (!PyUnicode_Check(filename)) { PyErr_Format(PyExc_TypeError, "expect str for filename, got %T", filename); return -1; } PyArena *arena = _PyArena_New(); if (arena == NULL) { return -1; } mod_ty mod; PyObject *interactive_src; int parse_res = pyrun_one_parse_ast(fp, filename, flags, arena, &mod, &interactive_src); if (parse_res != 0) { _PyArena_Free(arena); return parse_res; } PyObject *main_module = PyImport_AddModuleRef("__main__"); if (main_module == NULL) { _PyArena_Free(arena); return -1; } PyObject *main_dict = PyModule_GetDict(main_module); // borrowed ref PyObject *res = run_mod(mod, filename, main_dict, main_dict, flags, arena, interactive_src, 1); Py_INCREF(interactive_src); _PyArena_Free(arena); Py_DECREF(main_module); if (res == NULL) { PyThreadState *tstate = _PyThreadState_GET(); PyObject *exc = _PyErr_GetRaisedException(tstate); if (PyType_IsSubtype(Py_TYPE(exc), (PyTypeObject *) PyExc_SyntaxError)) { /* fix "text" attribute */ assert(interactive_src != NULL); PyObject *xs = PyUnicode_Splitlines(interactive_src, 1); if (xs == NULL) { goto error; } PyObject *exc_lineno = PyObject_GetAttr(exc, &_Py_ID(lineno)); if (exc_lineno == NULL) { Py_DECREF(xs); goto error; } int n = PyLong_AsInt(exc_lineno); Py_DECREF(exc_lineno); if (n <= 0 || n > PyList_GET_SIZE(xs)) { Py_DECREF(xs); goto error; } PyObject *line = PyList_GET_ITEM(xs, n - 1); PyObject_SetAttr(exc, &_Py_ID(text), line); Py_DECREF(xs); } error: Py_DECREF(interactive_src); _PyErr_SetRaisedException(tstate, exc); return -1; } Py_DECREF(interactive_src); Py_DECREF(res); flush_io(); return 0; } int PyRun_InteractiveOneObject(FILE *fp, PyObject *filename, PyCompilerFlags *flags) { int res = _PyRun_InteractiveOne(fp, filename, flags); if (res == -1) { PyErr_Print(); flush_io(); } return res; } int PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags) { PyObject *filename; int res; filename = PyUnicode_DecodeFSDefault(filename_str); if (filename == NULL) { PyErr_Print(); return -1; } res = PyRun_InteractiveOneObject(fp, filename, flags); Py_DECREF(filename); return res; } /* Check whether a file maybe a pyc file: Look at the extension, the file type, and, if we may close it, at the first few bytes. */ static int maybe_pyc_file(FILE *fp, PyObject *filename, int closeit) { PyObject *ext = PyUnicode_FromString(".pyc"); if (ext == NULL) { return -1; } Py_ssize_t endswith = PyUnicode_Tailmatch(filename, ext, 0, PY_SSIZE_T_MAX, +1); Py_DECREF(ext); if (endswith) { return 1; } /* Only look into the file if we are allowed to close it, since it then should also be seekable. */ if (!closeit) { return 0; } /* Read only two bytes of the magic. If the file was opened in text mode, the bytes 3 and 4 of the magic (\r\n) might not be read as they are on disk. */ unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF; unsigned char buf[2]; /* Mess: In case of -x, the stream is NOT at its start now, and ungetc() was used to push back the first newline, which makes the current stream position formally undefined, and a x-platform nightmare. Unfortunately, we have no direct way to know whether -x was specified. So we use a terrible hack: if the current stream position is not 0, we assume -x was specified, and give up. Bug 132850 on SourceForge spells out the hopelessness of trying anything else (fseek and ftell don't work predictably x-platform for text-mode files). */ int ispyc = 0; if (ftell(fp) == 0) { if (fread(buf, 1, 2, fp) == 2 && ((unsigned int)buf[1]<<8 | buf[0]) == halfmagic) ispyc = 1; rewind(fp); } return ispyc; } static int set_main_loader(PyObject *d, PyObject *filename, const char *loader_name) { PyInterpreterState *interp = _PyInterpreterState_GET(); PyObject *loader_type = _PyImport_GetImportlibExternalLoader(interp, loader_name); if (loader_type == NULL) { return -1; } PyObject *loader = PyObject_CallFunction(loader_type, "sO", "__main__", filename); Py_DECREF(loader_type); if (loader == NULL) { return -1; } if (PyDict_SetItemString(d, "__loader__", loader) < 0) { Py_DECREF(loader); return -1; } Py_DECREF(loader); return 0; } PyObject* _PyRun_SimpleFile(FILE *fp, PyObject *filename, int closeit, PyCompilerFlags *flags) { PyObject *res = NULL; int set_file_name = 0; PyObject *main_module = PyImport_AddModuleRef("__main__"); if (main_module == NULL) { goto done; } PyObject *dict = PyModule_GetDict(main_module); // borrowed ref int has_file = PyDict_ContainsString(dict, "__file__"); if (has_file < 0) { goto done; } if (!has_file) { if (PyDict_SetItemString(dict, "__file__", filename) < 0) { pyrun_error("failed to set __main__.__file__"); goto done; } set_file_name = 1; } int pyc = maybe_pyc_file(fp, filename, closeit); if (pyc < 0) { goto done; } if (pyc) { FILE *pyc_fp; /* Try to run a pyc file. First, re-open in binary */ if (closeit) { fclose(fp); } pyc_fp = Py_fopen(filename, "rb"); if (pyc_fp == NULL) { pyrun_error("Can't reopen .pyc file"); goto done; } if (set_main_loader(dict, filename, "SourcelessFileLoader") < 0) { pyrun_error("failed to set __main__.__loader__"); fclose(pyc_fp); goto done; } res = run_pyc_file(pyc_fp, dict, dict, flags); } else { /* When running from stdin, leave __main__.__loader__ alone */ if ((!PyUnicode_Check(filename) || !PyUnicode_EqualToUTF8(filename, "<stdin>")) && set_main_loader(dict, filename, "SourceFileLoader") < 0) { pyrun_error("failed to set __main__.__loader__"); goto done; } res = _PyRun_File(fp, filename, Py_file_input, dict, dict, closeit, flags); } flush_io(); done: if (set_file_name) { if (PyDict_PopString(dict, "__file__", NULL) < 0) { pyrun_error("failed to delete __main__.__file__"); Py_CLEAR(res); } } Py_XDECREF(main_module); return res; } int PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit, PyCompilerFlags *flags) { PyObject *filename_obj = PyUnicode_DecodeFSDefault(filename); if (filename_obj == NULL) { PyErr_Print(); return -1; } PyObject *result = _PyRun_SimpleFile(fp, filename_obj, closeit, flags); Py_DECREF(filename_obj); if (result == NULL) { PyErr_Print(); return -1; } return 0; } PyObject* _PyRun_SimpleString(const char *command, PyObject* name, PyCompilerFlags *flags) { PyObject *main_module = PyImport_AddModuleRef("__main__"); if (main_module == NULL) { return NULL; } PyObject *dict = PyModule_GetDict(main_module); // borrowed ref PyObject *res = _PyRun_String(command, name, Py_file_input, dict, dict, flags, 0); Py_DECREF(main_module); return res; } int PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags) { PyObject *res = _PyRun_SimpleString(command, NULL, flags); if (res == NULL) { PyErr_Print(); return -1; } Py_DECREF(res); return 0; } static int parse_exit_code(PyObject *code, int *exitcode_p) { if (PyLong_Check(code)) { // gh-125842: Use a long long to avoid an overflow error when `long` // is 32-bit. We still truncate the result to an int. int exitcode = (int)PyLong_AsLongLong(code); if (exitcode == -1 && PyErr_Occurred()) { // On overflow or other error, clear the exception and use -1 // as the exit code to match historical Python behavior. PyErr_Clear(); *exitcode_p = -1; return 1; } *exitcode_p = exitcode; return 1; } else if (code == Py_None) { *exitcode_p = 0; return 1; } return 0; } int _Py_HandleSystemExitAndKeyboardInterrupt(int *exitcode_p) { if (PyErr_ExceptionMatches(PyExc_KeyboardInterrupt)) { _Py_atomic_store_int(&_PyRuntime.signals.unhandled_keyboard_interrupt, 1); return 0; } int inspect = _Py_GetConfig()->inspect; if (inspect) { /* Don't exit if -i flag was given. This flag is set to 0 * when entering interactive mode for inspecting. */ return 0; } if (!PyErr_ExceptionMatches(PyExc_SystemExit)) { return 0; } fflush(stdout); PyObject *exc = PyErr_GetRaisedException(); assert(exc != NULL && PyExceptionInstance_Check(exc)); PyObject *code = PyObject_GetAttr(exc, &_Py_ID(code)); if (code == NULL) { // If the exception has no 'code' attribute, print the exception below PyErr_Clear(); } else if (parse_exit_code(code, exitcode_p)) { Py_DECREF(code); Py_CLEAR(exc); return 1; } else { // If code is not an int or None, print it below Py_SETREF(exc, code); } PyObject *sys_stderr; if (PySys_GetOptionalAttr(&_Py_ID(stderr), &sys_stderr) < 0) { PyErr_Clear(); } else if (sys_stderr != NULL && sys_stderr != Py_None) { if (PyFile_WriteObject(exc, sys_stderr, Py_PRINT_RAW) < 0) { PyErr_Clear(); } } else { if (PyObject_Print(exc, stderr, Py_PRINT_RAW) < 0) { PyErr_Clear(); } fflush(stderr); } PySys_WriteStderr("\n"); Py_XDECREF(sys_stderr); Py_CLEAR(exc); *exitcode_p = 1; return 1; } static void handle_system_exit(void) { int exitcode; if (_Py_HandleSystemExitAndKeyboardInterrupt(&exitcode)) { Py_Exit(exitcode); } } static void _PyErr_PrintEx(PyThreadState *tstate, int set_sys_last_vars) { PyObject *typ = NULL, *tb = NULL, *hook = NULL; handle_system_exit(); PyObject *exc = _PyErr_GetRaisedException(tstate); if (exc == NULL) { goto done; } assert(PyExceptionInstance_Check(exc)); typ = Py_NewRef(Py_TYPE(exc)); tb = PyException_GetTraceback(exc); if (tb == NULL) { tb = Py_NewRef(Py_None); } if (set_sys_last_vars) { if (_PySys_SetAttr(&_Py_ID(last_exc), exc) < 0) { _PyErr_Clear(tstate); } /* Legacy version: */ if (_PySys_SetAttr(&_Py_ID(last_type), typ) < 0) { _PyErr_Clear(tstate); } if (_PySys_SetAttr(&_Py_ID(last_value), exc) < 0) { _PyErr_Clear(tstate); } if (_PySys_SetAttr(&_Py_ID(last_traceback), tb) < 0) { _PyErr_Clear(tstate); } } if (PySys_GetOptionalAttr(&_Py_ID(excepthook), &hook) < 0) { PyErr_Clear(); } if (_PySys_Audit(tstate, "sys.excepthook", "OOOO", hook ? hook : Py_None, typ, exc, tb) < 0) { if (PyErr_ExceptionMatches(PyExc_RuntimeError)) { PyErr_Clear(); goto done; } PyErr_FormatUnraisable("Exception ignored in audit hook"); } if (hook) { PyObject* args[3] = {typ, exc, tb}; PyObject *result = PyObject_Vectorcall(hook, args, 3, NULL); if (result == NULL) { handle_system_exit(); PyObject *exc2 = _PyErr_GetRaisedException(tstate); assert(exc2 && PyExceptionInstance_Check(exc2)); fflush(stdout); PySys_WriteStderr("Error in sys.excepthook:\n"); PyErr_DisplayException(exc2); PySys_WriteStderr("\nOriginal exception was:\n"); PyErr_DisplayException(exc); Py_DECREF(exc2); } else { Py_DECREF(result); } } else { PySys_WriteStderr("sys.excepthook is missing\n"); PyErr_DisplayException(exc); } done: Py_XDECREF(hook); Py_XDECREF(typ); Py_XDECREF(exc); Py_XDECREF(tb); } void _PyErr_Print(PyThreadState *tstate) { _PyErr_PrintEx(tstate, 1); } void PyErr_PrintEx(int set_sys_last_vars) { PyThreadState *tstate = _PyThreadState_GET(); _PyErr_PrintEx(tstate, set_sys_last_vars); } void PyErr_Print(void) { PyErr_PrintEx(1); } struct exception_print_context { PyObject *file; PyObject *seen; // Prevent cycles in recursion }; static int print_exception_invalid_type(struct exception_print_context *ctx, PyObject *value) { PyObject *f = ctx->file; const char *const msg = "TypeError: print_exception(): Exception expected " "for value, "; if (PyFile_WriteString(msg, f) < 0) { return -1; } if (PyFile_WriteString(Py_TYPE(value)->tp_name, f) < 0) { return -1; } if (PyFile_WriteString(" found\n", f) < 0) { return -1; } return 0; } static int print_exception_traceback(struct exception_print_context *ctx, PyObject *value) { PyObject *f = ctx->file; int err = 0; PyObject *tb = PyException_GetTraceback(value); if (tb && tb != Py_None) { const char *header = EXCEPTION_TB_HEADER; err = _PyTraceBack_Print(tb, header, f); } Py_XDECREF(tb); return err; } static int print_exception_file_and_line(struct exception_print_context *ctx, PyObject **value_p) { PyObject *f = ctx->file; PyObject *tmp; int res = PyObject_GetOptionalAttr(*value_p, &_Py_ID(print_file_and_line), &tmp); if (res <= 0) { if (res < 0) { PyErr_Clear(); } return 0; } Py_DECREF(tmp); PyObject *filename = NULL; Py_ssize_t lineno = 0; PyObject* v = PyObject_GetAttr(*value_p, &_Py_ID(filename)); if (!v) { return -1; } if (v == Py_None) { Py_DECREF(v); _Py_DECLARE_STR(anon_string, "<string>"); filename = Py_NewRef(&_Py_STR(anon_string)); } else { filename = v; } PyObject *line = PyUnicode_FromFormat(" File \"%S\", line %zd\n", filename, lineno); Py_DECREF(filename); if (line == NULL) { goto error; } if (PyFile_WriteObject(line, f, Py_PRINT_RAW) < 0) { goto error; } Py_CLEAR(line); assert(!PyErr_Occurred()); return 0; error: Py_XDECREF(line); return -1; } /* Prints the message line: module.qualname[: str(exc)] */ static int print_exception_message(struct exception_print_context *ctx, PyObject *type, PyObject *value) { PyObject *f = ctx->file; if (PyErr_GivenExceptionMatches(value, PyExc_MemoryError)) { // The Python APIs in this function require allocating memory // for various objects. If we're out of memory, we can't do that, return -1; } assert(PyExceptionClass_Check(type)); PyObject *modulename = PyObject_GetAttr(type, &_Py_ID(__module__)); if (modulename == NULL || !PyUnicode_Check(modulename)) { Py_XDECREF(modulename); PyErr_Clear(); if (PyFile_WriteString("<unknown>.", f) < 0) { return -1; } } else { if (!_PyUnicode_Equal(modulename, &_Py_ID(builtins)) && !_PyUnicode_Equal(modulename, &_Py_ID(__main__))) { int res = PyFile_WriteObject(modulename, f, Py_PRINT_RAW); Py_DECREF(modulename); if (res < 0) { return -1; } if (PyFile_WriteString(".", f) < 0) { return -1; } } else { Py_DECREF(modulename); } } PyObject *qualname = PyType_GetQualName((PyTypeObject *)type); if (qualname == NULL || !PyUnicode_Check(qualname)) { Py_XDECREF(qualname); PyErr_Clear(); if (PyFile_WriteString("<unknown>", f) < 0) { return -1; } } else { int res = PyFile_WriteObject(qualname, f, Py_PRINT_RAW); Py_DECREF(qualname); if (res < 0) { return -1; } } if (Py_IsNone(value)) { return 0; } PyObject *s = PyObject_Str(value); if (s == NULL) { PyErr_Clear(); if (PyFile_WriteString(": <exception str() failed>", f) < 0) { return -1; } } else { /* only print colon if the str() of the object is not the empty string */ if (!PyUnicode_Check(s) || PyUnicode_GetLength(s) != 0) { if (PyFile_WriteString(": ", f) < 0) { Py_DECREF(s); return -1; } } int res = PyFile_WriteObject(s, f, Py_PRINT_RAW); Py_DECREF(s); if (res < 0) { return -1; } } return 0; } static int print_exception(struct exception_print_context *ctx, PyObject *value) { PyObject *f = ctx->file; if (!PyExceptionInstance_Check(value)) { return print_exception_invalid_type(ctx, value); } Py_INCREF(value); fflush(stdout); if (print_exception_traceback(ctx, value) < 0) { goto error; } /* grab the type and notes now because value can change below */ PyObject *type = (PyObject *) Py_TYPE(value); if (print_exception_file_and_line(ctx, &value) < 0) { goto error; } if (print_exception_message(ctx, type, value) < 0) { goto error; } if (PyFile_WriteString("\n", f) < 0) { |
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