1810 lines
50 KiB
C
1810 lines
50 KiB
C
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/* Top level execution of Python code (including in __main__) */
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/* To help control the interfaces between the startup, execution and
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* shutdown code, the phases are split across separate modules (boostrap,
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* pythonrun, shutdown)
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*/
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/* TODO: Cull includes following phase split */
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#include "Python.h"
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#include "Python-ast.h"
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#undef Yield /* undefine macro conflicting with <winbase.h> */
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#include "pycore_interp.h" // PyInterpreterState.importlib
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#include "pycore_object.h" // _PyDebug_PrintTotalRefs()
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#include "pycore_pyerrors.h" // _PyErr_Fetch
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#include "pycore_pylifecycle.h" // _Py_UnhandledKeyboardInterrupt
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#include "pycore_pystate.h" // _PyInterpreterState_GET()
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#include "pycore_sysmodule.h" // _PySys_Audit()
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#include "node.h" // node
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#include "token.h" // INDENT
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#include "parsetok.h" // perrdetail
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#include "errcode.h" // E_EOF
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#include "code.h" // PyCodeObject
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#include "symtable.h" // PySymtable_BuildObject()
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#include "ast.h" // PyAST_FromNodeObject()
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#include "marshal.h" // PyMarshal_ReadLongFromFile()
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#include "pegen_interface.h" // PyPegen_ASTFrom*
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#ifdef MS_WINDOWS
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# include "malloc.h" // alloca()
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#endif
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#ifdef MS_WINDOWS
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# undef BYTE
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# include "windows.h"
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#endif
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_Py_IDENTIFIER(builtins);
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_Py_IDENTIFIER(excepthook);
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_Py_IDENTIFIER(flush);
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_Py_IDENTIFIER(last_traceback);
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_Py_IDENTIFIER(last_type);
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_Py_IDENTIFIER(last_value);
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_Py_IDENTIFIER(ps1);
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_Py_IDENTIFIER(ps2);
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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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_Py_static_string(PyId_string, "<string>");
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#ifdef __cplusplus
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extern "C" {
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#endif
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extern Py_EXPORTED_SYMBOL grammar _PyParser_Grammar; /* From graminit.c */
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/* Forward */
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static void flush_io(void);
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static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *,
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PyCompilerFlags *, PyArena *);
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static PyObject *run_pyc_file(FILE *, const char *, PyObject *, PyObject *,
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PyCompilerFlags *);
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static void err_input(perrdetail *);
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static void err_free(perrdetail *);
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static int PyRun_InteractiveOneObjectEx(FILE *, PyObject *, PyCompilerFlags *);
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/* Parse input from a file and execute it */
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int
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PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit,
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PyCompilerFlags *flags)
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{
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if (filename == NULL)
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filename = "???";
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if (Py_FdIsInteractive(fp, filename)) {
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int err = PyRun_InteractiveLoopFlags(fp, filename, flags);
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if (closeit)
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fclose(fp);
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return err;
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}
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else
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return PyRun_SimpleFileExFlags(fp, filename, closeit, flags);
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}
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int
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PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)
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{
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PyObject *filename, *v;
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int ret, err;
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PyCompilerFlags local_flags = _PyCompilerFlags_INIT;
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int nomem_count = 0;
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#ifdef Py_REF_DEBUG
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int show_ref_count = _Py_GetConfig()->show_ref_count;
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#endif
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filename = PyUnicode_DecodeFSDefault(filename_str);
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if (filename == NULL) {
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PyErr_Print();
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return -1;
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}
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if (flags == NULL) {
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flags = &local_flags;
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}
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v = _PySys_GetObjectId(&PyId_ps1);
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if (v == NULL) {
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_PySys_SetObjectId(&PyId_ps1, v = PyUnicode_FromString(">>> "));
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Py_XDECREF(v);
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}
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v = _PySys_GetObjectId(&PyId_ps2);
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if (v == NULL) {
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_PySys_SetObjectId(&PyId_ps2, v = PyUnicode_FromString("... "));
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Py_XDECREF(v);
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}
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err = 0;
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do {
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ret = PyRun_InteractiveOneObjectEx(fp, filename, flags);
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if (ret == -1 && PyErr_Occurred()) {
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/* Prevent an endless loop after multiple consecutive MemoryErrors
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* while still allowing an interactive command to fail with a
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* MemoryError. */
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if (PyErr_ExceptionMatches(PyExc_MemoryError)) {
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if (++nomem_count > 16) {
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PyErr_Clear();
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err = -1;
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break;
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}
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} else {
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nomem_count = 0;
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}
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PyErr_Print();
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flush_io();
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} else {
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nomem_count = 0;
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}
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#ifdef Py_REF_DEBUG
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if (show_ref_count) {
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_PyDebug_PrintTotalRefs();
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}
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#endif
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} while (ret != E_EOF);
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Py_DECREF(filename);
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return err;
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}
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/* compute parser flags based on compiler flags */
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static int PARSER_FLAGS(PyCompilerFlags *flags)
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{
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int parser_flags = 0;
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if (!flags)
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return 0;
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if (flags->cf_flags & PyCF_DONT_IMPLY_DEDENT)
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parser_flags |= PyPARSE_DONT_IMPLY_DEDENT;
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if (flags->cf_flags & PyCF_IGNORE_COOKIE)
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parser_flags |= PyPARSE_IGNORE_COOKIE;
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if (flags->cf_flags & CO_FUTURE_BARRY_AS_BDFL)
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parser_flags |= PyPARSE_BARRY_AS_BDFL;
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if (flags->cf_flags & PyCF_TYPE_COMMENTS)
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parser_flags |= PyPARSE_TYPE_COMMENTS;
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return parser_flags;
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}
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#if 0
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/* Keep an example of flags with future keyword support. */
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#define PARSER_FLAGS(flags) \
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((flags) ? ((((flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \
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PyPARSE_DONT_IMPLY_DEDENT : 0) \
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| ((flags)->cf_flags & CO_FUTURE_WITH_STATEMENT ? \
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PyPARSE_WITH_IS_KEYWORD : 0)) : 0)
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#endif
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/* A PyRun_InteractiveOneObject() auxiliary function that does not print the
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* error on failure. */
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static int
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PyRun_InteractiveOneObjectEx(FILE *fp, PyObject *filename,
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PyCompilerFlags *flags)
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{
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PyObject *m, *d, *v, *w, *oenc = NULL, *mod_name;
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mod_ty mod;
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PyArena *arena;
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const char *ps1 = "", *ps2 = "", *enc = NULL;
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int errcode = 0;
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int use_peg = _PyInterpreterState_GET()->config._use_peg_parser;
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_Py_IDENTIFIER(encoding);
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_Py_IDENTIFIER(__main__);
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mod_name = _PyUnicode_FromId(&PyId___main__); /* borrowed */
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if (mod_name == NULL) {
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return -1;
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}
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if (fp == stdin) {
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/* Fetch encoding from sys.stdin if possible. */
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v = _PySys_GetObjectId(&PyId_stdin);
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if (v && v != Py_None) {
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oenc = _PyObject_GetAttrId(v, &PyId_encoding);
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if (oenc)
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enc = PyUnicode_AsUTF8(oenc);
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if (!enc)
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PyErr_Clear();
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}
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}
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v = _PySys_GetObjectId(&PyId_ps1);
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if (v != NULL) {
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v = PyObject_Str(v);
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if (v == NULL)
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PyErr_Clear();
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else if (PyUnicode_Check(v)) {
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ps1 = PyUnicode_AsUTF8(v);
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if (ps1 == NULL) {
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PyErr_Clear();
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ps1 = "";
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}
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}
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}
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w = _PySys_GetObjectId(&PyId_ps2);
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if (w != NULL) {
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w = PyObject_Str(w);
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if (w == NULL)
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PyErr_Clear();
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else if (PyUnicode_Check(w)) {
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ps2 = PyUnicode_AsUTF8(w);
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if (ps2 == NULL) {
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PyErr_Clear();
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ps2 = "";
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}
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}
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}
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arena = PyArena_New();
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if (arena == NULL) {
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Py_XDECREF(v);
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Py_XDECREF(w);
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Py_XDECREF(oenc);
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return -1;
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}
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if (use_peg) {
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mod = PyPegen_ASTFromFileObject(fp, filename, Py_single_input,
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enc, ps1, ps2, flags, &errcode, arena);
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}
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else {
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mod = PyParser_ASTFromFileObject(fp, filename, enc,
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Py_single_input, ps1, ps2,
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flags, &errcode, arena);
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}
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Py_XDECREF(v);
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Py_XDECREF(w);
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Py_XDECREF(oenc);
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if (mod == NULL) {
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PyArena_Free(arena);
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if (errcode == E_EOF) {
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PyErr_Clear();
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return E_EOF;
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}
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return -1;
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}
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m = PyImport_AddModuleObject(mod_name);
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if (m == NULL) {
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PyArena_Free(arena);
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return -1;
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}
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d = PyModule_GetDict(m);
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v = run_mod(mod, filename, d, d, flags, arena);
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PyArena_Free(arena);
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if (v == NULL) {
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return -1;
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}
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Py_DECREF(v);
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flush_io();
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return 0;
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}
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int
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PyRun_InteractiveOneObject(FILE *fp, PyObject *filename, PyCompilerFlags *flags)
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{
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int res;
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res = PyRun_InteractiveOneObjectEx(fp, filename, flags);
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if (res == -1) {
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PyErr_Print();
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flush_io();
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}
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return res;
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}
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int
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PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)
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{
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PyObject *filename;
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int res;
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filename = PyUnicode_DecodeFSDefault(filename_str);
|
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if (filename == NULL) {
|
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PyErr_Print();
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return -1;
|
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}
|
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res = PyRun_InteractiveOneObject(fp, filename, flags);
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Py_DECREF(filename);
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return res;
|
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}
|
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|
|
|
|
/* Check whether a file maybe a pyc file: Look at the extension,
|
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the file type, and, if we may close it, at the first few bytes. */
|
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|
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static int
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maybe_pyc_file(FILE *fp, const char* filename, const char* ext, int closeit)
|
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{
|
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if (strcmp(ext, ".pyc") == 0)
|
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return 1;
|
|
|
|
/* Only look into the file if we are allowed to close it, since
|
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it then should also be seekable. */
|
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if (closeit) {
|
|
/* 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,
|
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and a x-platform nightmare.
|
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Unfortunately, we have no direct way to know whether -x
|
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was specified. So we use a terrible hack: if the current
|
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stream position is not 0, we assume -x was specified, and
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give up. Bug 132850 on SourceForge spells out the
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hopelessness of trying anything else (fseek and ftell
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don't work predictably x-platform for text-mode files).
|
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*/
|
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int ispyc = 0;
|
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if (ftell(fp) == 0) {
|
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if (fread(buf, 1, 2, fp) == 2 &&
|
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((unsigned int)buf[1]<<8 | buf[0]) == halfmagic)
|
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ispyc = 1;
|
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rewind(fp);
|
|
}
|
|
return ispyc;
|
|
}
|
|
return 0;
|
|
}
|
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|
|
static int
|
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set_main_loader(PyObject *d, const char *filename, const char *loader_name)
|
|
{
|
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PyObject *filename_obj, *bootstrap, *loader_type = NULL, *loader;
|
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int result = 0;
|
|
|
|
filename_obj = PyUnicode_DecodeFSDefault(filename);
|
|
if (filename_obj == NULL)
|
|
return -1;
|
|
PyInterpreterState *interp = _PyInterpreterState_GET();
|
|
bootstrap = PyObject_GetAttrString(interp->importlib,
|
|
"_bootstrap_external");
|
|
if (bootstrap != NULL) {
|
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loader_type = PyObject_GetAttrString(bootstrap, loader_name);
|
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Py_DECREF(bootstrap);
|
|
}
|
|
if (loader_type == NULL) {
|
|
Py_DECREF(filename_obj);
|
|
return -1;
|
|
}
|
|
loader = PyObject_CallFunction(loader_type, "sN", "__main__", filename_obj);
|
|
Py_DECREF(loader_type);
|
|
if (loader == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyDict_SetItemString(d, "__loader__", loader) < 0) {
|
|
result = -1;
|
|
}
|
|
Py_DECREF(loader);
|
|
return result;
|
|
}
|
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|
|
int
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PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,
|
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PyCompilerFlags *flags)
|
|
{
|
|
PyObject *m, *d, *v;
|
|
const char *ext;
|
|
int set_file_name = 0, ret = -1;
|
|
size_t len;
|
|
|
|
m = PyImport_AddModule("__main__");
|
|
if (m == NULL)
|
|
return -1;
|
|
Py_INCREF(m);
|
|
d = PyModule_GetDict(m);
|
|
if (PyDict_GetItemString(d, "__file__") == NULL) {
|
|
PyObject *f;
|
|
f = PyUnicode_DecodeFSDefault(filename);
|
|
if (f == NULL)
|
|
goto done;
|
|
if (PyDict_SetItemString(d, "__file__", f) < 0) {
|
|
Py_DECREF(f);
|
|
goto done;
|
|
}
|
|
if (PyDict_SetItemString(d, "__cached__", Py_None) < 0) {
|
|
Py_DECREF(f);
|
|
goto done;
|
|
}
|
|
set_file_name = 1;
|
|
Py_DECREF(f);
|
|
}
|
|
len = strlen(filename);
|
|
ext = filename + len - (len > 4 ? 4 : 0);
|
|
if (maybe_pyc_file(fp, filename, ext, closeit)) {
|
|
FILE *pyc_fp;
|
|
/* Try to run a pyc file. First, re-open in binary */
|
|
if (closeit)
|
|
fclose(fp);
|
|
if ((pyc_fp = _Py_fopen(filename, "rb")) == NULL) {
|
|
fprintf(stderr, "python: Can't reopen .pyc file\n");
|
|
goto done;
|
|
}
|
|
|
|
if (set_main_loader(d, filename, "SourcelessFileLoader") < 0) {
|
|
fprintf(stderr, "python: failed to set __main__.__loader__\n");
|
|
ret = -1;
|
|
fclose(pyc_fp);
|
|
goto done;
|
|
}
|
|
v = run_pyc_file(pyc_fp, filename, d, d, flags);
|
|
} else {
|
|
/* When running from stdin, leave __main__.__loader__ alone */
|
|
if (strcmp(filename, "<stdin>") != 0 &&
|
|
set_main_loader(d, filename, "SourceFileLoader") < 0) {
|
|
fprintf(stderr, "python: failed to set __main__.__loader__\n");
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
v = PyRun_FileExFlags(fp, filename, Py_file_input, d, d,
|
|
closeit, flags);
|
|
}
|
|
flush_io();
|
|
if (v == NULL) {
|
|
Py_CLEAR(m);
|
|
PyErr_Print();
|
|
goto done;
|
|
}
|
|
Py_DECREF(v);
|
|
ret = 0;
|
|
done:
|
|
if (set_file_name) {
|
|
if (PyDict_DelItemString(d, "__file__")) {
|
|
PyErr_Clear();
|
|
}
|
|
if (PyDict_DelItemString(d, "__cached__")) {
|
|
PyErr_Clear();
|
|
}
|
|
}
|
|
Py_XDECREF(m);
|
|
return ret;
|
|
}
|
|
|
|
int
|
|
PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags)
|
|
{
|
|
PyObject *m, *d, *v;
|
|
m = PyImport_AddModule("__main__");
|
|
if (m == NULL)
|
|
return -1;
|
|
d = PyModule_GetDict(m);
|
|
v = PyRun_StringFlags(command, Py_file_input, d, d, flags);
|
|
if (v == NULL) {
|
|
PyErr_Print();
|
|
return -1;
|
|
}
|
|
Py_DECREF(v);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
parse_syntax_error(PyObject *err, PyObject **message, PyObject **filename,
|
|
int *lineno, int *offset, PyObject **text)
|
|
{
|
|
int hold;
|
|
PyObject *v;
|
|
_Py_IDENTIFIER(msg);
|
|
_Py_IDENTIFIER(filename);
|
|
_Py_IDENTIFIER(lineno);
|
|
_Py_IDENTIFIER(offset);
|
|
_Py_IDENTIFIER(text);
|
|
|
|
*message = NULL;
|
|
*filename = NULL;
|
|
|
|
/* new style errors. `err' is an instance */
|
|
*message = _PyObject_GetAttrId(err, &PyId_msg);
|
|
if (!*message)
|
|
goto finally;
|
|
|
|
v = _PyObject_GetAttrId(err, &PyId_filename);
|
|
if (!v)
|
|
goto finally;
|
|
if (v == Py_None) {
|
|
Py_DECREF(v);
|
|
*filename = _PyUnicode_FromId(&PyId_string);
|
|
if (*filename == NULL)
|
|
goto finally;
|
|
Py_INCREF(*filename);
|
|
}
|
|
else {
|
|
*filename = v;
|
|
}
|
|
|
|
v = _PyObject_GetAttrId(err, &PyId_lineno);
|
|
if (!v)
|
|
goto finally;
|
|
hold = _PyLong_AsInt(v);
|
|
Py_DECREF(v);
|
|
if (hold < 0 && PyErr_Occurred())
|
|
goto finally;
|
|
*lineno = hold;
|
|
|
|
v = _PyObject_GetAttrId(err, &PyId_offset);
|
|
if (!v)
|
|
goto finally;
|
|
if (v == Py_None) {
|
|
*offset = -1;
|
|
Py_DECREF(v);
|
|
} else {
|
|
hold = _PyLong_AsInt(v);
|
|
Py_DECREF(v);
|
|
if (hold < 0 && PyErr_Occurred())
|
|
goto finally;
|
|
*offset = hold;
|
|
}
|
|
|
|
v = _PyObject_GetAttrId(err, &PyId_text);
|
|
if (!v)
|
|
goto finally;
|
|
if (v == Py_None) {
|
|
Py_DECREF(v);
|
|
*text = NULL;
|
|
}
|
|
else {
|
|
*text = v;
|
|
}
|
|
return 1;
|
|
|
|
finally:
|
|
Py_XDECREF(*message);
|
|
Py_XDECREF(*filename);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
print_error_text(PyObject *f, int offset, PyObject *text_obj)
|
|
{
|
|
const char *text;
|
|
const char *nl;
|
|
|
|
text = PyUnicode_AsUTF8(text_obj);
|
|
if (text == NULL)
|
|
return;
|
|
|
|
if (offset >= 0) {
|
|
if (offset > 0 && (size_t)offset == strlen(text) && text[offset - 1] == '\n')
|
|
offset--;
|
|
for (;;) {
|
|
nl = strchr(text, '\n');
|
|
if (nl == NULL || nl-text >= offset)
|
|
break;
|
|
offset -= (int)(nl+1-text);
|
|
text = nl+1;
|
|
}
|
|
while (*text == ' ' || *text == '\t' || *text == '\f') {
|
|
text++;
|
|
offset--;
|
|
}
|
|
}
|
|
PyFile_WriteString(" ", f);
|
|
PyFile_WriteString(text, f);
|
|
if (*text == '\0' || text[strlen(text)-1] != '\n')
|
|
PyFile_WriteString("\n", f);
|
|
if (offset == -1)
|
|
return;
|
|
PyFile_WriteString(" ", f);
|
|
while (--offset > 0)
|
|
PyFile_WriteString(" ", f);
|
|
PyFile_WriteString("^\n", f);
|
|
}
|
|
|
|
|
|
int
|
|
_Py_HandleSystemExit(int *exitcode_p)
|
|
{
|
|
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;
|
|
}
|
|
|
|
PyObject *exception, *value, *tb;
|
|
PyErr_Fetch(&exception, &value, &tb);
|
|
|
|
fflush(stdout);
|
|
|
|
int exitcode = 0;
|
|
if (value == NULL || value == Py_None) {
|
|
goto done;
|
|
}
|
|
|
|
if (PyExceptionInstance_Check(value)) {
|
|
/* The error code should be in the `code' attribute. */
|
|
_Py_IDENTIFIER(code);
|
|
PyObject *code = _PyObject_GetAttrId(value, &PyId_code);
|
|
if (code) {
|
|
Py_DECREF(value);
|
|
value = code;
|
|
if (value == Py_None)
|
|
goto done;
|
|
}
|
|
/* If we failed to dig out the 'code' attribute,
|
|
just let the else clause below print the error. */
|
|
}
|
|
|
|
if (PyLong_Check(value)) {
|
|
exitcode = (int)PyLong_AsLong(value);
|
|
}
|
|
else {
|
|
PyObject *sys_stderr = _PySys_GetObjectId(&PyId_stderr);
|
|
/* We clear the exception here to avoid triggering the assertion
|
|
* in PyObject_Str that ensures it won't silently lose exception
|
|
* details.
|
|
*/
|
|
PyErr_Clear();
|
|
if (sys_stderr != NULL && sys_stderr != Py_None) {
|
|
PyFile_WriteObject(value, sys_stderr, Py_PRINT_RAW);
|
|
} else {
|
|
PyObject_Print(value, stderr, Py_PRINT_RAW);
|
|
fflush(stderr);
|
|
}
|
|
PySys_WriteStderr("\n");
|
|
exitcode = 1;
|
|
}
|
|
|
|
done:
|
|
/* Restore and clear the exception info, in order to properly decref
|
|
* the exception, value, and traceback. If we just exit instead,
|
|
* these leak, which confuses PYTHONDUMPREFS output, and may prevent
|
|
* some finalizers from running.
|
|
*/
|
|
PyErr_Restore(exception, value, tb);
|
|
PyErr_Clear();
|
|
*exitcode_p = exitcode;
|
|
return 1;
|
|
}
|
|
|
|
|
|
static void
|
|
handle_system_exit(void)
|
|
{
|
|
int exitcode;
|
|
if (_Py_HandleSystemExit(&exitcode)) {
|
|
Py_Exit(exitcode);
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
_PyErr_PrintEx(PyThreadState *tstate, int set_sys_last_vars)
|
|
{
|
|
PyObject *exception, *v, *tb, *hook;
|
|
|
|
handle_system_exit();
|
|
|
|
_PyErr_Fetch(tstate, &exception, &v, &tb);
|
|
if (exception == NULL) {
|
|
goto done;
|
|
}
|
|
|
|
_PyErr_NormalizeException(tstate, &exception, &v, &tb);
|
|
if (tb == NULL) {
|
|
tb = Py_None;
|
|
Py_INCREF(tb);
|
|
}
|
|
PyException_SetTraceback(v, tb);
|
|
if (exception == NULL) {
|
|
goto done;
|
|
}
|
|
|
|
/* Now we know v != NULL too */
|
|
if (set_sys_last_vars) {
|
|
if (_PySys_SetObjectId(&PyId_last_type, exception) < 0) {
|
|
_PyErr_Clear(tstate);
|
|
}
|
|
if (_PySys_SetObjectId(&PyId_last_value, v) < 0) {
|
|
_PyErr_Clear(tstate);
|
|
}
|
|
if (_PySys_SetObjectId(&PyId_last_traceback, tb) < 0) {
|
|
_PyErr_Clear(tstate);
|
|
}
|
|
}
|
|
hook = _PySys_GetObjectId(&PyId_excepthook);
|
|
if (_PySys_Audit(tstate, "sys.excepthook", "OOOO", hook ? hook : Py_None,
|
|
exception, v, tb) < 0) {
|
|
if (PyErr_ExceptionMatches(PyExc_RuntimeError)) {
|
|
PyErr_Clear();
|
|
goto done;
|
|
}
|
|
_PyErr_WriteUnraisableMsg("in audit hook", NULL);
|
|
}
|
|
if (hook) {
|
|
PyObject* stack[3];
|
|
PyObject *result;
|
|
|
|
stack[0] = exception;
|
|
stack[1] = v;
|
|
stack[2] = tb;
|
|
result = _PyObject_FastCall(hook, stack, 3);
|
|
if (result == NULL) {
|
|
handle_system_exit();
|
|
|
|
PyObject *exception2, *v2, *tb2;
|
|
_PyErr_Fetch(tstate, &exception2, &v2, &tb2);
|
|
_PyErr_NormalizeException(tstate, &exception2, &v2, &tb2);
|
|
/* It should not be possible for exception2 or v2
|
|
to be NULL. However PyErr_Display() can't
|
|
tolerate NULLs, so just be safe. */
|
|
if (exception2 == NULL) {
|
|
exception2 = Py_None;
|
|
Py_INCREF(exception2);
|
|
}
|
|
if (v2 == NULL) {
|
|
v2 = Py_None;
|
|
Py_INCREF(v2);
|
|
}
|
|
fflush(stdout);
|
|
PySys_WriteStderr("Error in sys.excepthook:\n");
|
|
PyErr_Display(exception2, v2, tb2);
|
|
PySys_WriteStderr("\nOriginal exception was:\n");
|
|
PyErr_Display(exception, v, tb);
|
|
Py_DECREF(exception2);
|
|
Py_DECREF(v2);
|
|
Py_XDECREF(tb2);
|
|
}
|
|
Py_XDECREF(result);
|
|
}
|
|
else {
|
|
PySys_WriteStderr("sys.excepthook is missing\n");
|
|
PyErr_Display(exception, v, tb);
|
|
}
|
|
|
|
done:
|
|
Py_XDECREF(exception);
|
|
Py_XDECREF(v);
|
|
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);
|
|
}
|
|
|
|
static void
|
|
print_exception(PyObject *f, PyObject *value)
|
|
{
|
|
int err = 0;
|
|
PyObject *type, *tb;
|
|
_Py_IDENTIFIER(print_file_and_line);
|
|
|
|
if (!PyExceptionInstance_Check(value)) {
|
|
err = PyFile_WriteString("TypeError: print_exception(): Exception expected for value, ", f);
|
|
err += PyFile_WriteString(Py_TYPE(value)->tp_name, f);
|
|
err += PyFile_WriteString(" found\n", f);
|
|
if (err)
|
|
PyErr_Clear();
|
|
return;
|
|
}
|
|
|
|
Py_INCREF(value);
|
|
fflush(stdout);
|
|
type = (PyObject *) Py_TYPE(value);
|
|
tb = PyException_GetTraceback(value);
|
|
if (tb && tb != Py_None)
|
|
err = PyTraceBack_Print(tb, f);
|
|
if (err == 0 &&
|
|
_PyObject_HasAttrId(value, &PyId_print_file_and_line))
|
|
{
|
|
PyObject *message, *filename, *text;
|
|
int lineno, offset;
|
|
if (!parse_syntax_error(value, &message, &filename,
|
|
&lineno, &offset, &text))
|
|
PyErr_Clear();
|
|
else {
|
|
PyObject *line;
|
|
|
|
Py_DECREF(value);
|
|
value = message;
|
|
|
|
line = PyUnicode_FromFormat(" File \"%S\", line %d\n",
|
|
filename, lineno);
|
|
Py_DECREF(filename);
|
|
if (line != NULL) {
|
|
PyFile_WriteObject(line, f, Py_PRINT_RAW);
|
|
Py_DECREF(line);
|
|
}
|
|
|
|
if (text != NULL) {
|
|
print_error_text(f, offset, text);
|
|
Py_DECREF(text);
|
|
}
|
|
|
|
/* Can't be bothered to check all those
|
|
PyFile_WriteString() calls */
|
|
if (PyErr_Occurred())
|
|
err = -1;
|
|
}
|
|
}
|
|
if (err) {
|
|
/* Don't do anything else */
|
|
}
|
|
else {
|
|
PyObject* moduleName;
|
|
const char *className;
|
|
_Py_IDENTIFIER(__module__);
|
|
assert(PyExceptionClass_Check(type));
|
|
className = PyExceptionClass_Name(type);
|
|
if (className != NULL) {
|
|
const char *dot = strrchr(className, '.');
|
|
if (dot != NULL)
|
|
className = dot+1;
|
|
}
|
|
|
|
moduleName = _PyObject_GetAttrId(type, &PyId___module__);
|
|
if (moduleName == NULL || !PyUnicode_Check(moduleName))
|
|
{
|
|
Py_XDECREF(moduleName);
|
|
err = PyFile_WriteString("<unknown>", f);
|
|
}
|
|
else {
|
|
if (!_PyUnicode_EqualToASCIIId(moduleName, &PyId_builtins))
|
|
{
|
|
err = PyFile_WriteObject(moduleName, f, Py_PRINT_RAW);
|
|
err += PyFile_WriteString(".", f);
|
|
}
|
|
Py_DECREF(moduleName);
|
|
}
|
|
if (err == 0) {
|
|
if (className == NULL)
|
|
err = PyFile_WriteString("<unknown>", f);
|
|
else
|
|
err = PyFile_WriteString(className, f);
|
|
}
|
|
}
|
|
if (err == 0 && (value != Py_None)) {
|
|
PyObject *s = PyObject_Str(value);
|
|
/* only print colon if the str() of the
|
|
object is not the empty string
|
|
*/
|
|
if (s == NULL) {
|
|
PyErr_Clear();
|
|
err = -1;
|
|
PyFile_WriteString(": <exception str() failed>", f);
|
|
}
|
|
else if (!PyUnicode_Check(s) ||
|
|
PyUnicode_GetLength(s) != 0)
|
|
err = PyFile_WriteString(": ", f);
|
|
if (err == 0)
|
|
err = PyFile_WriteObject(s, f, Py_PRINT_RAW);
|
|
Py_XDECREF(s);
|
|
}
|
|
/* try to write a newline in any case */
|
|
if (err < 0) {
|
|
PyErr_Clear();
|
|
}
|
|
err += PyFile_WriteString("\n", f);
|
|
Py_XDECREF(tb);
|
|
Py_DECREF(value);
|
|
/* If an error happened here, don't show it.
|
|
XXX This is wrong, but too many callers rely on this behavior. */
|
|
if (err != 0)
|
|
PyErr_Clear();
|
|
}
|
|
|
|
static const char cause_message[] =
|
|
"\nThe above exception was the direct cause "
|
|
"of the following exception:\n\n";
|
|
|
|
static const char context_message[] =
|
|
"\nDuring handling of the above exception, "
|
|
"another exception occurred:\n\n";
|
|
|
|
static void
|
|
print_exception_recursive(PyObject *f, PyObject *value, PyObject *seen)
|
|
{
|
|
int err = 0, res;
|
|
PyObject *cause, *context;
|
|
|
|
if (seen != NULL) {
|
|
/* Exception chaining */
|
|
PyObject *value_id = PyLong_FromVoidPtr(value);
|
|
if (value_id == NULL || PySet_Add(seen, value_id) == -1)
|
|
PyErr_Clear();
|
|
else if (PyExceptionInstance_Check(value)) {
|
|
PyObject *check_id = NULL;
|
|
cause = PyException_GetCause(value);
|
|
context = PyException_GetContext(value);
|
|
if (cause) {
|
|
check_id = PyLong_FromVoidPtr(cause);
|
|
if (check_id == NULL) {
|
|
res = -1;
|
|
} else {
|
|
res = PySet_Contains(seen, check_id);
|
|
Py_DECREF(check_id);
|
|
}
|
|
if (res == -1)
|
|
PyErr_Clear();
|
|
if (res == 0) {
|
|
print_exception_recursive(
|
|
f, cause, seen);
|
|
err |= PyFile_WriteString(
|
|
cause_message, f);
|
|
}
|
|
}
|
|
else if (context &&
|
|
!((PyBaseExceptionObject *)value)->suppress_context) {
|
|
check_id = PyLong_FromVoidPtr(context);
|
|
if (check_id == NULL) {
|
|
res = -1;
|
|
} else {
|
|
res = PySet_Contains(seen, check_id);
|
|
Py_DECREF(check_id);
|
|
}
|
|
if (res == -1)
|
|
PyErr_Clear();
|
|
if (res == 0) {
|
|
print_exception_recursive(
|
|
f, context, seen);
|
|
err |= PyFile_WriteString(
|
|
context_message, f);
|
|
}
|
|
}
|
|
Py_XDECREF(context);
|
|
Py_XDECREF(cause);
|
|
}
|
|
Py_XDECREF(value_id);
|
|
}
|
|
print_exception(f, value);
|
|
if (err != 0)
|
|
PyErr_Clear();
|
|
}
|
|
|
|
void
|
|
_PyErr_Display(PyObject *file, PyObject *exception, PyObject *value, PyObject *tb)
|
|
{
|
|
assert(file != NULL && file != Py_None);
|
|
|
|
PyObject *seen;
|
|
if (PyExceptionInstance_Check(value)
|
|
&& tb != NULL && PyTraceBack_Check(tb)) {
|
|
/* Put the traceback on the exception, otherwise it won't get
|
|
displayed. See issue #18776. */
|
|
PyObject *cur_tb = PyException_GetTraceback(value);
|
|
if (cur_tb == NULL)
|
|
PyException_SetTraceback(value, tb);
|
|
else
|
|
Py_DECREF(cur_tb);
|
|
}
|
|
|
|
/* We choose to ignore seen being possibly NULL, and report
|
|
at least the main exception (it could be a MemoryError).
|
|
*/
|
|
seen = PySet_New(NULL);
|
|
if (seen == NULL) {
|
|
PyErr_Clear();
|
|
}
|
|
print_exception_recursive(file, value, seen);
|
|
Py_XDECREF(seen);
|
|
|
|
/* Call file.flush() */
|
|
PyObject *res = _PyObject_CallMethodIdNoArgs(file, &PyId_flush);
|
|
if (!res) {
|
|
/* Silently ignore file.flush() error */
|
|
PyErr_Clear();
|
|
}
|
|
else {
|
|
Py_DECREF(res);
|
|
}
|
|
}
|
|
|
|
void
|
|
PyErr_Display(PyObject *exception, PyObject *value, PyObject *tb)
|
|
{
|
|
PyObject *file = _PySys_GetObjectId(&PyId_stderr);
|
|
if (file == NULL) {
|
|
_PyObject_Dump(value);
|
|
fprintf(stderr, "lost sys.stderr\n");
|
|
return;
|
|
}
|
|
if (file == Py_None) {
|
|
return;
|
|
}
|
|
|
|
_PyErr_Display(file, exception, value, tb);
|
|
}
|
|
|
|
PyObject *
|
|
PyRun_StringFlags(const char *str, int start, PyObject *globals,
|
|
PyObject *locals, PyCompilerFlags *flags)
|
|
{
|
|
PyObject *ret = NULL;
|
|
mod_ty mod;
|
|
PyArena *arena;
|
|
PyObject *filename;
|
|
int use_peg = _PyInterpreterState_GET()->config._use_peg_parser;
|
|
|
|
filename = _PyUnicode_FromId(&PyId_string); /* borrowed */
|
|
if (filename == NULL)
|
|
return NULL;
|
|
|
|
arena = PyArena_New();
|
|
if (arena == NULL)
|
|
return NULL;
|
|
|
|
if (use_peg) {
|
|
mod = PyPegen_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
else {
|
|
mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
|
|
if (mod != NULL)
|
|
ret = run_mod(mod, filename, globals, locals, flags, arena);
|
|
PyArena_Free(arena);
|
|
return ret;
|
|
}
|
|
|
|
PyObject *
|
|
PyRun_FileExFlags(FILE *fp, const char *filename_str, int start, PyObject *globals,
|
|
PyObject *locals, int closeit, PyCompilerFlags *flags)
|
|
{
|
|
PyObject *ret = NULL;
|
|
mod_ty mod;
|
|
PyArena *arena = NULL;
|
|
PyObject *filename;
|
|
int use_peg = _PyInterpreterState_GET()->config._use_peg_parser;
|
|
|
|
filename = PyUnicode_DecodeFSDefault(filename_str);
|
|
if (filename == NULL)
|
|
goto exit;
|
|
|
|
arena = PyArena_New();
|
|
if (arena == NULL)
|
|
goto exit;
|
|
|
|
if (use_peg) {
|
|
mod = PyPegen_ASTFromFileObject(fp, filename, start, NULL, NULL, NULL,
|
|
flags, NULL, arena);
|
|
}
|
|
else {
|
|
mod = PyParser_ASTFromFileObject(fp, filename, NULL, start, 0, 0,
|
|
flags, NULL, arena);
|
|
}
|
|
|
|
if (closeit)
|
|
fclose(fp);
|
|
if (mod == NULL) {
|
|
goto exit;
|
|
}
|
|
ret = run_mod(mod, filename, globals, locals, flags, arena);
|
|
|
|
exit:
|
|
Py_XDECREF(filename);
|
|
if (arena != NULL)
|
|
PyArena_Free(arena);
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
flush_io(void)
|
|
{
|
|
PyObject *f, *r;
|
|
PyObject *type, *value, *traceback;
|
|
|
|
/* Save the current exception */
|
|
PyErr_Fetch(&type, &value, &traceback);
|
|
|
|
f = _PySys_GetObjectId(&PyId_stderr);
|
|
if (f != NULL) {
|
|
r = _PyObject_CallMethodIdNoArgs(f, &PyId_flush);
|
|
if (r)
|
|
Py_DECREF(r);
|
|
else
|
|
PyErr_Clear();
|
|
}
|
|
f = _PySys_GetObjectId(&PyId_stdout);
|
|
if (f != NULL) {
|
|
r = _PyObject_CallMethodIdNoArgs(f, &PyId_flush);
|
|
if (r)
|
|
Py_DECREF(r);
|
|
else
|
|
PyErr_Clear();
|
|
}
|
|
|
|
PyErr_Restore(type, value, traceback);
|
|
}
|
|
|
|
static PyObject *
|
|
run_eval_code_obj(PyThreadState *tstate, PyCodeObject *co, PyObject *globals, PyObject *locals)
|
|
{
|
|
PyObject *v;
|
|
/*
|
|
* We explicitly re-initialize _Py_UnhandledKeyboardInterrupt every eval
|
|
* _just in case_ someone is calling into an embedded Python where they
|
|
* don't care about an uncaught KeyboardInterrupt exception (why didn't they
|
|
* leave config.install_signal_handlers set to 0?!?) but then later call
|
|
* Py_Main() itself (which _checks_ this flag and dies with a signal after
|
|
* its interpreter exits). We don't want a previous embedded interpreter's
|
|
* uncaught exception to trigger an unexplained signal exit from a future
|
|
* Py_Main() based one.
|
|
*/
|
|
_Py_UnhandledKeyboardInterrupt = 0;
|
|
|
|
/* Set globals['__builtins__'] if it doesn't exist */
|
|
if (globals != NULL && PyDict_GetItemString(globals, "__builtins__") == NULL) {
|
|
if (PyDict_SetItemString(globals, "__builtins__",
|
|
tstate->interp->builtins) < 0) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
v = PyEval_EvalCode((PyObject*)co, globals, locals);
|
|
if (!v && _PyErr_Occurred(tstate) == PyExc_KeyboardInterrupt) {
|
|
_Py_UnhandledKeyboardInterrupt = 1;
|
|
}
|
|
return v;
|
|
}
|
|
|
|
static PyObject *
|
|
run_mod(mod_ty mod, PyObject *filename, PyObject *globals, PyObject *locals,
|
|
PyCompilerFlags *flags, PyArena *arena)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyCodeObject *co = PyAST_CompileObject(mod, filename, flags, -1, arena);
|
|
if (co == NULL)
|
|
return NULL;
|
|
|
|
if (_PySys_Audit(tstate, "exec", "O", co) < 0) {
|
|
Py_DECREF(co);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *v = run_eval_code_obj(tstate, co, globals, locals);
|
|
Py_DECREF(co);
|
|
return v;
|
|
}
|
|
|
|
static PyObject *
|
|
run_pyc_file(FILE *fp, const char *filename, PyObject *globals,
|
|
PyObject *locals, PyCompilerFlags *flags)
|
|
{
|
|
PyThreadState *tstate = _PyThreadState_GET();
|
|
PyCodeObject *co;
|
|
PyObject *v;
|
|
long magic;
|
|
long PyImport_GetMagicNumber(void);
|
|
|
|
magic = PyMarshal_ReadLongFromFile(fp);
|
|
if (magic != PyImport_GetMagicNumber()) {
|
|
if (!PyErr_Occurred())
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"Bad magic number in .pyc file");
|
|
goto error;
|
|
}
|
|
/* Skip the rest of the header. */
|
|
(void) PyMarshal_ReadLongFromFile(fp);
|
|
(void) PyMarshal_ReadLongFromFile(fp);
|
|
(void) PyMarshal_ReadLongFromFile(fp);
|
|
if (PyErr_Occurred()) {
|
|
goto error;
|
|
}
|
|
v = PyMarshal_ReadLastObjectFromFile(fp);
|
|
if (v == NULL || !PyCode_Check(v)) {
|
|
Py_XDECREF(v);
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"Bad code object in .pyc file");
|
|
goto error;
|
|
}
|
|
fclose(fp);
|
|
co = (PyCodeObject *)v;
|
|
v = run_eval_code_obj(tstate, co, globals, locals);
|
|
if (v && flags)
|
|
flags->cf_flags |= (co->co_flags & PyCF_MASK);
|
|
Py_DECREF(co);
|
|
return v;
|
|
error:
|
|
fclose(fp);
|
|
return NULL;
|
|
}
|
|
|
|
PyObject *
|
|
Py_CompileStringObject(const char *str, PyObject *filename, int start,
|
|
PyCompilerFlags *flags, int optimize)
|
|
{
|
|
PyCodeObject *co;
|
|
mod_ty mod;
|
|
int use_peg = _PyInterpreterState_GET()->config._use_peg_parser;
|
|
PyArena *arena = PyArena_New();
|
|
if (arena == NULL)
|
|
return NULL;
|
|
|
|
if (use_peg) {
|
|
mod = PyPegen_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
else {
|
|
mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
if (mod == NULL) {
|
|
PyArena_Free(arena);
|
|
return NULL;
|
|
}
|
|
if (flags && (flags->cf_flags & PyCF_ONLY_AST)) {
|
|
PyObject *result = PyAST_mod2obj(mod);
|
|
PyArena_Free(arena);
|
|
return result;
|
|
}
|
|
co = PyAST_CompileObject(mod, filename, flags, optimize, arena);
|
|
PyArena_Free(arena);
|
|
return (PyObject *)co;
|
|
}
|
|
|
|
PyObject *
|
|
Py_CompileStringExFlags(const char *str, const char *filename_str, int start,
|
|
PyCompilerFlags *flags, int optimize)
|
|
{
|
|
PyObject *filename, *co;
|
|
filename = PyUnicode_DecodeFSDefault(filename_str);
|
|
if (filename == NULL)
|
|
return NULL;
|
|
co = Py_CompileStringObject(str, filename, start, flags, optimize);
|
|
Py_DECREF(filename);
|
|
return co;
|
|
}
|
|
|
|
/* For use in Py_LIMITED_API */
|
|
#undef Py_CompileString
|
|
PyObject *
|
|
PyCompileString(const char *str, const char *filename, int start)
|
|
{
|
|
return Py_CompileStringFlags(str, filename, start, NULL);
|
|
}
|
|
|
|
const char *
|
|
_Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyCompilerFlags *cf, PyObject **cmd_copy)
|
|
{
|
|
const char *str;
|
|
Py_ssize_t size;
|
|
Py_buffer view;
|
|
|
|
*cmd_copy = NULL;
|
|
if (PyUnicode_Check(cmd)) {
|
|
cf->cf_flags |= PyCF_IGNORE_COOKIE;
|
|
str = PyUnicode_AsUTF8AndSize(cmd, &size);
|
|
if (str == NULL)
|
|
return NULL;
|
|
}
|
|
else if (PyBytes_Check(cmd)) {
|
|
str = PyBytes_AS_STRING(cmd);
|
|
size = PyBytes_GET_SIZE(cmd);
|
|
}
|
|
else if (PyByteArray_Check(cmd)) {
|
|
str = PyByteArray_AS_STRING(cmd);
|
|
size = PyByteArray_GET_SIZE(cmd);
|
|
}
|
|
else if (PyObject_GetBuffer(cmd, &view, PyBUF_SIMPLE) == 0) {
|
|
/* Copy to NUL-terminated buffer. */
|
|
*cmd_copy = PyBytes_FromStringAndSize(
|
|
(const char *)view.buf, view.len);
|
|
PyBuffer_Release(&view);
|
|
if (*cmd_copy == NULL) {
|
|
return NULL;
|
|
}
|
|
str = PyBytes_AS_STRING(*cmd_copy);
|
|
size = PyBytes_GET_SIZE(*cmd_copy);
|
|
}
|
|
else {
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s() arg 1 must be a %s object",
|
|
funcname, what);
|
|
return NULL;
|
|
}
|
|
|
|
if (strlen(str) != (size_t)size) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"source code string cannot contain null bytes");
|
|
Py_CLEAR(*cmd_copy);
|
|
return NULL;
|
|
}
|
|
return str;
|
|
}
|
|
|
|
struct symtable *
|
|
Py_SymtableStringObject(const char *str, PyObject *filename, int start)
|
|
{
|
|
PyCompilerFlags flags = _PyCompilerFlags_INIT;
|
|
return _Py_SymtableStringObjectFlags(str, filename, start, &flags);
|
|
}
|
|
|
|
struct symtable *
|
|
_Py_SymtableStringObjectFlags(const char *str, PyObject *filename, int start, PyCompilerFlags *flags)
|
|
{
|
|
struct symtable *st;
|
|
mod_ty mod;
|
|
int use_peg = _PyInterpreterState_GET()->config._use_peg_parser;
|
|
PyArena *arena;
|
|
|
|
arena = PyArena_New();
|
|
if (arena == NULL)
|
|
return NULL;
|
|
|
|
if (use_peg) {
|
|
mod = PyPegen_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
else {
|
|
mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);
|
|
}
|
|
if (mod == NULL) {
|
|
PyArena_Free(arena);
|
|
return NULL;
|
|
}
|
|
st = PySymtable_BuildObject(mod, filename, 0);
|
|
PyArena_Free(arena);
|
|
return st;
|
|
}
|
|
|
|
struct symtable *
|
|
Py_SymtableString(const char *str, const char *filename_str, int start)
|
|
{
|
|
PyObject *filename;
|
|
struct symtable *st;
|
|
|
|
filename = PyUnicode_DecodeFSDefault(filename_str);
|
|
if (filename == NULL)
|
|
return NULL;
|
|
st = Py_SymtableStringObject(str, filename, start);
|
|
Py_DECREF(filename);
|
|
return st;
|
|
}
|
|
|
|
/* Preferred access to parser is through AST. */
|
|
mod_ty
|
|
PyParser_ASTFromStringObject(const char *s, PyObject *filename, int start,
|
|
PyCompilerFlags *flags, PyArena *arena)
|
|
{
|
|
mod_ty mod;
|
|
PyCompilerFlags localflags = _PyCompilerFlags_INIT;
|
|
perrdetail err;
|
|
int iflags = PARSER_FLAGS(flags);
|
|
if (flags && flags->cf_feature_version < 7)
|
|
iflags |= PyPARSE_ASYNC_HACKS;
|
|
|
|
node *n = PyParser_ParseStringObject(s, filename,
|
|
&_PyParser_Grammar, start, &err,
|
|
&iflags);
|
|
if (flags == NULL) {
|
|
flags = &localflags;
|
|
}
|
|
if (n) {
|
|
flags->cf_flags |= iflags & PyCF_MASK;
|
|
mod = PyAST_FromNodeObject(n, flags, filename, arena);
|
|
PyNode_Free(n);
|
|
}
|
|
else {
|
|
err_input(&err);
|
|
mod = NULL;
|
|
}
|
|
err_free(&err);
|
|
return mod;
|
|
}
|
|
|
|
mod_ty
|
|
PyParser_ASTFromString(const char *s, const char *filename_str, int start,
|
|
PyCompilerFlags *flags, PyArena *arena)
|
|
{
|
|
PyObject *filename;
|
|
mod_ty mod;
|
|
filename = PyUnicode_DecodeFSDefault(filename_str);
|
|
if (filename == NULL)
|
|
return NULL;
|
|
mod = PyParser_ASTFromStringObject(s, filename, start, flags, arena);
|
|
Py_DECREF(filename);
|
|
return mod;
|
|
}
|
|
|
|
mod_ty
|
|
PyParser_ASTFromFileObject(FILE *fp, PyObject *filename, const char* enc,
|
|
int start, const char *ps1,
|
|
const char *ps2, PyCompilerFlags *flags, int *errcode,
|
|
PyArena *arena)
|
|
{
|
|
mod_ty mod;
|
|
PyCompilerFlags localflags = _PyCompilerFlags_INIT;
|
|
perrdetail err;
|
|
int iflags = PARSER_FLAGS(flags);
|
|
|
|
node *n = PyParser_ParseFileObject(fp, filename, enc,
|
|
&_PyParser_Grammar,
|
|
start, ps1, ps2, &err, &iflags);
|
|
if (flags == NULL) {
|
|
flags = &localflags;
|
|
}
|
|
if (n) {
|
|
flags->cf_flags |= iflags & PyCF_MASK;
|
|
mod = PyAST_FromNodeObject(n, flags, filename, arena);
|
|
PyNode_Free(n);
|
|
}
|
|
else {
|
|
err_input(&err);
|
|
if (errcode)
|
|
*errcode = err.error;
|
|
mod = NULL;
|
|
}
|
|
err_free(&err);
|
|
return mod;
|
|
}
|
|
|
|
mod_ty
|
|
PyParser_ASTFromFile(FILE *fp, const char *filename_str, const char* enc,
|
|
int start, const char *ps1,
|
|
const char *ps2, PyCompilerFlags *flags, int *errcode,
|
|
PyArena *arena)
|
|
{
|
|
mod_ty mod;
|
|
PyObject *filename;
|
|
filename = PyUnicode_DecodeFSDefault(filename_str);
|
|
if (filename == NULL)
|
|
return NULL;
|
|
mod = PyParser_ASTFromFileObject(fp, filename, enc, start, ps1, ps2,
|
|
flags, errcode, arena);
|
|
Py_DECREF(filename);
|
|
return mod;
|
|
}
|
|
|
|
/* Simplified interface to parsefile -- return node or set exception */
|
|
|
|
node *
|
|
PyParser_SimpleParseFileFlags(FILE *fp, const char *filename, int start, int flags)
|
|
{
|
|
perrdetail err;
|
|
node *n = PyParser_ParseFileFlags(fp, filename, NULL,
|
|
&_PyParser_Grammar,
|
|
start, NULL, NULL, &err, flags);
|
|
if (n == NULL)
|
|
err_input(&err);
|
|
err_free(&err);
|
|
|
|
return n;
|
|
}
|
|
|
|
/* Simplified interface to parsestring -- return node or set exception */
|
|
|
|
node *
|
|
PyParser_SimpleParseStringFlags(const char *str, int start, int flags)
|
|
{
|
|
perrdetail err;
|
|
node *n = PyParser_ParseStringFlags(str, &_PyParser_Grammar,
|
|
start, &err, flags);
|
|
if (n == NULL)
|
|
err_input(&err);
|
|
err_free(&err);
|
|
return n;
|
|
}
|
|
|
|
node *
|
|
PyParser_SimpleParseStringFlagsFilename(const char *str, const char *filename,
|
|
int start, int flags)
|
|
{
|
|
perrdetail err;
|
|
node *n = PyParser_ParseStringFlagsFilename(str, filename,
|
|
&_PyParser_Grammar, start, &err, flags);
|
|
if (n == NULL)
|
|
err_input(&err);
|
|
err_free(&err);
|
|
return n;
|
|
}
|
|
|
|
/* May want to move a more generalized form of this to parsetok.c or
|
|
even parser modules. */
|
|
|
|
void
|
|
PyParser_ClearError(perrdetail *err)
|
|
{
|
|
err_free(err);
|
|
}
|
|
|
|
void
|
|
PyParser_SetError(perrdetail *err)
|
|
{
|
|
err_input(err);
|
|
}
|
|
|
|
static void
|
|
err_free(perrdetail *err)
|
|
{
|
|
Py_CLEAR(err->filename);
|
|
}
|
|
|
|
/* Set the error appropriate to the given input error code (see errcode.h) */
|
|
|
|
static void
|
|
err_input(perrdetail *err)
|
|
{
|
|
PyObject *v, *w, *errtype, *errtext;
|
|
PyObject *msg_obj = NULL;
|
|
const char *msg = NULL;
|
|
int offset = err->offset;
|
|
|
|
errtype = PyExc_SyntaxError;
|
|
switch (err->error) {
|
|
case E_ERROR:
|
|
goto cleanup;
|
|
case E_SYNTAX:
|
|
errtype = PyExc_IndentationError;
|
|
if (err->expected == INDENT)
|
|
msg = "expected an indented block";
|
|
else if (err->token == INDENT)
|
|
msg = "unexpected indent";
|
|
else if (err->token == DEDENT)
|
|
msg = "unexpected unindent";
|
|
else if (err->expected == NOTEQUAL) {
|
|
errtype = PyExc_SyntaxError;
|
|
msg = "with Barry as BDFL, use '<>' instead of '!='";
|
|
}
|
|
else {
|
|
errtype = PyExc_SyntaxError;
|
|
msg = "invalid syntax";
|
|
}
|
|
break;
|
|
case E_TOKEN:
|
|
msg = "invalid token";
|
|
break;
|
|
case E_EOFS:
|
|
msg = "EOF while scanning triple-quoted string literal";
|
|
break;
|
|
case E_EOLS:
|
|
msg = "EOL while scanning string literal";
|
|
break;
|
|
case E_INTR:
|
|
if (!PyErr_Occurred())
|
|
PyErr_SetNone(PyExc_KeyboardInterrupt);
|
|
goto cleanup;
|
|
case E_NOMEM:
|
|
PyErr_NoMemory();
|
|
goto cleanup;
|
|
case E_EOF:
|
|
msg = "unexpected EOF while parsing";
|
|
break;
|
|
case E_TABSPACE:
|
|
errtype = PyExc_TabError;
|
|
msg = "inconsistent use of tabs and spaces in indentation";
|
|
break;
|
|
case E_OVERFLOW:
|
|
msg = "expression too long";
|
|
break;
|
|
case E_DEDENT:
|
|
errtype = PyExc_IndentationError;
|
|
msg = "unindent does not match any outer indentation level";
|
|
break;
|
|
case E_TOODEEP:
|
|
errtype = PyExc_IndentationError;
|
|
msg = "too many levels of indentation";
|
|
break;
|
|
case E_DECODE: {
|
|
PyObject *type, *value, *tb;
|
|
PyErr_Fetch(&type, &value, &tb);
|
|
msg = "unknown decode error";
|
|
if (value != NULL)
|
|
msg_obj = PyObject_Str(value);
|
|
Py_XDECREF(type);
|
|
Py_XDECREF(value);
|
|
Py_XDECREF(tb);
|
|
break;
|
|
}
|
|
case E_LINECONT:
|
|
msg = "unexpected character after line continuation character";
|
|
break;
|
|
|
|
case E_BADSINGLE:
|
|
msg = "multiple statements found while compiling a single statement";
|
|
break;
|
|
default:
|
|
fprintf(stderr, "error=%d\n", err->error);
|
|
msg = "unknown parsing error";
|
|
break;
|
|
}
|
|
/* err->text may not be UTF-8 in case of decoding errors.
|
|
Explicitly convert to an object. */
|
|
if (!err->text) {
|
|
errtext = Py_None;
|
|
Py_INCREF(Py_None);
|
|
} else {
|
|
errtext = PyUnicode_DecodeUTF8(err->text, err->offset,
|
|
"replace");
|
|
if (errtext != NULL) {
|
|
Py_ssize_t len = strlen(err->text);
|
|
offset = (int)PyUnicode_GET_LENGTH(errtext);
|
|
if (len != err->offset) {
|
|
Py_DECREF(errtext);
|
|
errtext = PyUnicode_DecodeUTF8(err->text, len,
|
|
"replace");
|
|
}
|
|
}
|
|
}
|
|
v = Py_BuildValue("(OiiN)", err->filename,
|
|
err->lineno, offset, errtext);
|
|
if (v != NULL) {
|
|
if (msg_obj)
|
|
w = Py_BuildValue("(OO)", msg_obj, v);
|
|
else
|
|
w = Py_BuildValue("(sO)", msg, v);
|
|
} else
|
|
w = NULL;
|
|
Py_XDECREF(v);
|
|
PyErr_SetObject(errtype, w);
|
|
Py_XDECREF(w);
|
|
cleanup:
|
|
Py_XDECREF(msg_obj);
|
|
if (err->text != NULL) {
|
|
PyObject_FREE(err->text);
|
|
err->text = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
#if defined(USE_STACKCHECK)
|
|
#if defined(WIN32) && defined(_MSC_VER)
|
|
|
|
/* Stack checking for Microsoft C */
|
|
|
|
#include <malloc.h>
|
|
#include <excpt.h>
|
|
|
|
/*
|
|
* Return non-zero when we run out of memory on the stack; zero otherwise.
|
|
*/
|
|
int
|
|
PyOS_CheckStack(void)
|
|
{
|
|
__try {
|
|
/* alloca throws a stack overflow exception if there's
|
|
not enough space left on the stack */
|
|
alloca(PYOS_STACK_MARGIN * sizeof(void*));
|
|
return 0;
|
|
} __except (GetExceptionCode() == STATUS_STACK_OVERFLOW ?
|
|
EXCEPTION_EXECUTE_HANDLER :
|
|
EXCEPTION_CONTINUE_SEARCH) {
|
|
int errcode = _resetstkoflw();
|
|
if (errcode == 0)
|
|
{
|
|
Py_FatalError("Could not reset the stack!");
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
#endif /* WIN32 && _MSC_VER */
|
|
|
|
/* Alternate implementations can be added here... */
|
|
|
|
#endif /* USE_STACKCHECK */
|
|
|
|
/* Deprecated C API functions still provided for binary compatibility */
|
|
|
|
#undef PyParser_SimpleParseFile
|
|
PyAPI_FUNC(node *)
|
|
PyParser_SimpleParseFile(FILE *fp, const char *filename, int start)
|
|
{
|
|
return PyParser_SimpleParseFileFlags(fp, filename, start, 0);
|
|
}
|
|
|
|
#undef PyParser_SimpleParseString
|
|
PyAPI_FUNC(node *)
|
|
PyParser_SimpleParseString(const char *str, int start)
|
|
{
|
|
return PyParser_SimpleParseStringFlags(str, start, 0);
|
|
}
|
|
|
|
#undef PyRun_AnyFile
|
|
PyAPI_FUNC(int)
|
|
PyRun_AnyFile(FILE *fp, const char *name)
|
|
{
|
|
return PyRun_AnyFileExFlags(fp, name, 0, NULL);
|
|
}
|
|
|
|
#undef PyRun_AnyFileEx
|
|
PyAPI_FUNC(int)
|
|
PyRun_AnyFileEx(FILE *fp, const char *name, int closeit)
|
|
{
|
|
return PyRun_AnyFileExFlags(fp, name, closeit, NULL);
|
|
}
|
|
|
|
#undef PyRun_AnyFileFlags
|
|
PyAPI_FUNC(int)
|
|
PyRun_AnyFileFlags(FILE *fp, const char *name, PyCompilerFlags *flags)
|
|
{
|
|
return PyRun_AnyFileExFlags(fp, name, 0, flags);
|
|
}
|
|
|
|
#undef PyRun_File
|
|
PyAPI_FUNC(PyObject *)
|
|
PyRun_File(FILE *fp, const char *p, int s, PyObject *g, PyObject *l)
|
|
{
|
|
return PyRun_FileExFlags(fp, p, s, g, l, 0, NULL);
|
|
}
|
|
|
|
#undef PyRun_FileEx
|
|
PyAPI_FUNC(PyObject *)
|
|
PyRun_FileEx(FILE *fp, const char *p, int s, PyObject *g, PyObject *l, int c)
|
|
{
|
|
return PyRun_FileExFlags(fp, p, s, g, l, c, NULL);
|
|
}
|
|
|
|
#undef PyRun_FileFlags
|
|
PyAPI_FUNC(PyObject *)
|
|
PyRun_FileFlags(FILE *fp, const char *p, int s, PyObject *g, PyObject *l,
|
|
PyCompilerFlags *flags)
|
|
{
|
|
return PyRun_FileExFlags(fp, p, s, g, l, 0, flags);
|
|
}
|
|
|
|
#undef PyRun_SimpleFile
|
|
PyAPI_FUNC(int)
|
|
PyRun_SimpleFile(FILE *f, const char *p)
|
|
{
|
|
return PyRun_SimpleFileExFlags(f, p, 0, NULL);
|
|
}
|
|
|
|
#undef PyRun_SimpleFileEx
|
|
PyAPI_FUNC(int)
|
|
PyRun_SimpleFileEx(FILE *f, const char *p, int c)
|
|
{
|
|
return PyRun_SimpleFileExFlags(f, p, c, NULL);
|
|
}
|
|
|
|
|
|
#undef PyRun_String
|
|
PyAPI_FUNC(PyObject *)
|
|
PyRun_String(const char *str, int s, PyObject *g, PyObject *l)
|
|
{
|
|
return PyRun_StringFlags(str, s, g, l, NULL);
|
|
}
|
|
|
|
#undef PyRun_SimpleString
|
|
PyAPI_FUNC(int)
|
|
PyRun_SimpleString(const char *s)
|
|
{
|
|
return PyRun_SimpleStringFlags(s, NULL);
|
|
}
|
|
|
|
#undef Py_CompileString
|
|
PyAPI_FUNC(PyObject *)
|
|
Py_CompileString(const char *str, const char *p, int s)
|
|
{
|
|
return Py_CompileStringExFlags(str, p, s, NULL, -1);
|
|
}
|
|
|
|
#undef Py_CompileStringFlags
|
|
PyAPI_FUNC(PyObject *)
|
|
Py_CompileStringFlags(const char *str, const char *p, int s,
|
|
PyCompilerFlags *flags)
|
|
{
|
|
return Py_CompileStringExFlags(str, p, s, flags, -1);
|
|
}
|
|
|
|
#undef PyRun_InteractiveOne
|
|
PyAPI_FUNC(int)
|
|
PyRun_InteractiveOne(FILE *f, const char *p)
|
|
{
|
|
return PyRun_InteractiveOneFlags(f, p, NULL);
|
|
}
|
|
|
|
#undef PyRun_InteractiveLoop
|
|
PyAPI_FUNC(int)
|
|
PyRun_InteractiveLoop(FILE *f, const char *p)
|
|
{
|
|
return PyRun_InteractiveLoopFlags(f, p, NULL);
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|