/src/Python-3.8.3/Python/pythonrun.c
Line  | Count  | Source  | 
1  |  |  | 
2  |  | /* Top level execution of Python code (including in __main__) */  | 
3  |  |  | 
4  |  | /* To help control the interfaces between the startup, execution and  | 
5  |  |  * shutdown code, the phases are split across separate modules (boostrap,  | 
6  |  |  * pythonrun, shutdown)  | 
7  |  |  */  | 
8  |  |  | 
9  |  | /* TODO: Cull includes following phase split */  | 
10  |  |  | 
11  |  | #include "Python.h"  | 
12  |  |  | 
13  |  | #include "Python-ast.h"  | 
14  |  | #undef Yield   /* undefine macro conflicting with <winbase.h> */  | 
15  |  | #include "pycore_pyerrors.h"  | 
16  |  | #include "pycore_pylifecycle.h"  | 
17  |  | #include "pycore_pystate.h"  | 
18  |  | #include "grammar.h"  | 
19  |  | #include "node.h"  | 
20  |  | #include "token.h"  | 
21  |  | #include "parsetok.h"  | 
22  |  | #include "errcode.h"  | 
23  |  | #include "code.h"  | 
24  |  | #include "symtable.h"  | 
25  |  | #include "ast.h"  | 
26  |  | #include "marshal.h"  | 
27  |  | #include "osdefs.h"  | 
28  |  | #include <locale.h>  | 
29  |  |  | 
30  |  | #ifdef HAVE_SIGNAL_H  | 
31  |  | #include <signal.h>  | 
32  |  | #endif  | 
33  |  |  | 
34  |  | #ifdef MS_WINDOWS  | 
35  |  | #include "malloc.h" /* for alloca */  | 
36  |  | #endif  | 
37  |  |  | 
38  |  | #ifdef MS_WINDOWS  | 
39  |  | #undef BYTE  | 
40  |  | #include "windows.h"  | 
41  |  | #endif  | 
42  |  |  | 
43  |  | _Py_IDENTIFIER(builtins);  | 
44  |  | _Py_IDENTIFIER(excepthook);  | 
45  |  | _Py_IDENTIFIER(flush);  | 
46  |  | _Py_IDENTIFIER(last_traceback);  | 
47  |  | _Py_IDENTIFIER(last_type);  | 
48  |  | _Py_IDENTIFIER(last_value);  | 
49  |  | _Py_IDENTIFIER(ps1);  | 
50  |  | _Py_IDENTIFIER(ps2);  | 
51  |  | _Py_IDENTIFIER(stdin);  | 
52  |  | _Py_IDENTIFIER(stdout);  | 
53  |  | _Py_IDENTIFIER(stderr);  | 
54  |  | _Py_static_string(PyId_string, "<string>");  | 
55  |  |  | 
56  |  | #ifdef __cplusplus  | 
57  |  | extern "C" { | 
58  |  | #endif  | 
59  |  |  | 
60  |  | extern grammar _PyParser_Grammar; /* From graminit.c */  | 
61  |  |  | 
62  |  | /* Forward */  | 
63  |  | static void flush_io(void);  | 
64  |  | static PyObject *run_mod(mod_ty, PyObject *, PyObject *, PyObject *,  | 
65  |  |                           PyCompilerFlags *, PyArena *);  | 
66  |  | static PyObject *run_pyc_file(FILE *, const char *, PyObject *, PyObject *,  | 
67  |  |                               PyCompilerFlags *);  | 
68  |  | static void err_input(perrdetail *);  | 
69  |  | static void err_free(perrdetail *);  | 
70  |  | static int PyRun_InteractiveOneObjectEx(FILE *, PyObject *, PyCompilerFlags *);  | 
71  |  |  | 
72  |  | /* Parse input from a file and execute it */  | 
73  |  | int  | 
74  |  | PyRun_AnyFileExFlags(FILE *fp, const char *filename, int closeit,  | 
75  |  |                      PyCompilerFlags *flags)  | 
76  | 0  | { | 
77  | 0  |     if (filename == NULL)  | 
78  | 0  |         filename = "???";  | 
79  | 0  |     if (Py_FdIsInteractive(fp, filename)) { | 
80  | 0  |         int err = PyRun_InteractiveLoopFlags(fp, filename, flags);  | 
81  | 0  |         if (closeit)  | 
82  | 0  |             fclose(fp);  | 
83  | 0  |         return err;  | 
84  | 0  |     }  | 
85  | 0  |     else  | 
86  | 0  |         return PyRun_SimpleFileExFlags(fp, filename, closeit, flags);  | 
87  | 0  | }  | 
88  |  |  | 
89  |  | int  | 
90  |  | PyRun_InteractiveLoopFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)  | 
91  | 0  | { | 
92  | 0  |     PyObject *filename, *v;  | 
93  | 0  |     int ret, err;  | 
94  | 0  |     PyCompilerFlags local_flags = _PyCompilerFlags_INIT;  | 
95  | 0  |     int nomem_count = 0;  | 
96  |  | #ifdef Py_REF_DEBUG  | 
97  |  |     int show_ref_count = _PyInterpreterState_Get()->config.show_ref_count;  | 
98  |  | #endif  | 
99  |  | 
  | 
100  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
101  | 0  |     if (filename == NULL) { | 
102  | 0  |         PyErr_Print();  | 
103  | 0  |         return -1;  | 
104  | 0  |     }  | 
105  |  |  | 
106  | 0  |     if (flags == NULL) { | 
107  | 0  |         flags = &local_flags;  | 
108  | 0  |     }  | 
109  | 0  |     v = _PySys_GetObjectId(&PyId_ps1);  | 
110  | 0  |     if (v == NULL) { | 
111  | 0  |         _PySys_SetObjectId(&PyId_ps1, v = PyUnicode_FromString(">>> ")); | 
112  | 0  |         Py_XDECREF(v);  | 
113  | 0  |     }  | 
114  | 0  |     v = _PySys_GetObjectId(&PyId_ps2);  | 
115  | 0  |     if (v == NULL) { | 
116  | 0  |         _PySys_SetObjectId(&PyId_ps2, v = PyUnicode_FromString("... ")); | 
117  | 0  |         Py_XDECREF(v);  | 
118  | 0  |     }  | 
119  | 0  |     err = 0;  | 
120  | 0  |     do { | 
121  | 0  |         ret = PyRun_InteractiveOneObjectEx(fp, filename, flags);  | 
122  | 0  |         if (ret == -1 && PyErr_Occurred()) { | 
123  |  |             /* Prevent an endless loop after multiple consecutive MemoryErrors  | 
124  |  |              * while still allowing an interactive command to fail with a  | 
125  |  |              * MemoryError. */  | 
126  | 0  |             if (PyErr_ExceptionMatches(PyExc_MemoryError)) { | 
127  | 0  |                 if (++nomem_count > 16) { | 
128  | 0  |                     PyErr_Clear();  | 
129  | 0  |                     err = -1;  | 
130  | 0  |                     break;  | 
131  | 0  |                 }  | 
132  | 0  |             } else { | 
133  | 0  |                 nomem_count = 0;  | 
134  | 0  |             }  | 
135  | 0  |             PyErr_Print();  | 
136  | 0  |             flush_io();  | 
137  | 0  |         } else { | 
138  | 0  |             nomem_count = 0;  | 
139  | 0  |         }  | 
140  |  | #ifdef Py_REF_DEBUG  | 
141  |  |         if (show_ref_count) { | 
142  |  |             _PyDebug_PrintTotalRefs();  | 
143  |  |         }  | 
144  |  | #endif  | 
145  | 0  |     } while (ret != E_EOF);  | 
146  | 0  |     Py_DECREF(filename);  | 
147  | 0  |     return err;  | 
148  | 0  | }  | 
149  |  |  | 
150  |  | /* compute parser flags based on compiler flags */  | 
151  |  | static int PARSER_FLAGS(PyCompilerFlags *flags)  | 
152  | 16  | { | 
153  | 16  |     int parser_flags = 0;  | 
154  | 16  |     if (!flags)  | 
155  | 14  |         return 0;  | 
156  | 2  |     if (flags->cf_flags & PyCF_DONT_IMPLY_DEDENT)  | 
157  | 0  |         parser_flags |= PyPARSE_DONT_IMPLY_DEDENT;  | 
158  | 2  |     if (flags->cf_flags & PyCF_IGNORE_COOKIE)  | 
159  | 2  |         parser_flags |= PyPARSE_IGNORE_COOKIE;  | 
160  | 2  |     if (flags->cf_flags & CO_FUTURE_BARRY_AS_BDFL)  | 
161  | 0  |         parser_flags |= PyPARSE_BARRY_AS_BDFL;  | 
162  | 2  |     if (flags->cf_flags & PyCF_TYPE_COMMENTS)  | 
163  | 0  |         parser_flags |= PyPARSE_TYPE_COMMENTS;  | 
164  | 2  |     return parser_flags;  | 
165  | 16  | }  | 
166  |  |  | 
167  |  | #if 0  | 
168  |  | /* Keep an example of flags with future keyword support. */  | 
169  |  | #define PARSER_FLAGS(flags) \  | 
170  |  |     ((flags) ? ((((flags)->cf_flags & PyCF_DONT_IMPLY_DEDENT) ? \  | 
171  |  |                   PyPARSE_DONT_IMPLY_DEDENT : 0) \  | 
172  |  |                 | ((flags)->cf_flags & CO_FUTURE_WITH_STATEMENT ? \  | 
173  |  |                    PyPARSE_WITH_IS_KEYWORD : 0)) : 0)  | 
174  |  | #endif  | 
175  |  |  | 
176  |  | /* A PyRun_InteractiveOneObject() auxiliary function that does not print the  | 
177  |  |  * error on failure. */  | 
178  |  | static int  | 
179  |  | PyRun_InteractiveOneObjectEx(FILE *fp, PyObject *filename,  | 
180  |  |                              PyCompilerFlags *flags)  | 
181  | 0  | { | 
182  | 0  |     PyObject *m, *d, *v, *w, *oenc = NULL, *mod_name;  | 
183  | 0  |     mod_ty mod;  | 
184  | 0  |     PyArena *arena;  | 
185  | 0  |     const char *ps1 = "", *ps2 = "", *enc = NULL;  | 
186  | 0  |     int errcode = 0;  | 
187  | 0  |     _Py_IDENTIFIER(encoding);  | 
188  | 0  |     _Py_IDENTIFIER(__main__);  | 
189  |  | 
  | 
190  | 0  |     mod_name = _PyUnicode_FromId(&PyId___main__); /* borrowed */  | 
191  | 0  |     if (mod_name == NULL) { | 
192  | 0  |         return -1;  | 
193  | 0  |     }  | 
194  |  |  | 
195  | 0  |     if (fp == stdin) { | 
196  |  |         /* Fetch encoding from sys.stdin if possible. */  | 
197  | 0  |         v = _PySys_GetObjectId(&PyId_stdin);  | 
198  | 0  |         if (v && v != Py_None) { | 
199  | 0  |             oenc = _PyObject_GetAttrId(v, &PyId_encoding);  | 
200  | 0  |             if (oenc)  | 
201  | 0  |                 enc = PyUnicode_AsUTF8(oenc);  | 
202  | 0  |             if (!enc)  | 
203  | 0  |                 PyErr_Clear();  | 
204  | 0  |         }  | 
205  | 0  |     }  | 
206  | 0  |     v = _PySys_GetObjectId(&PyId_ps1);  | 
207  | 0  |     if (v != NULL) { | 
208  | 0  |         v = PyObject_Str(v);  | 
209  | 0  |         if (v == NULL)  | 
210  | 0  |             PyErr_Clear();  | 
211  | 0  |         else if (PyUnicode_Check(v)) { | 
212  | 0  |             ps1 = PyUnicode_AsUTF8(v);  | 
213  | 0  |             if (ps1 == NULL) { | 
214  | 0  |                 PyErr_Clear();  | 
215  | 0  |                 ps1 = "";  | 
216  | 0  |             }  | 
217  | 0  |         }  | 
218  | 0  |     }  | 
219  | 0  |     w = _PySys_GetObjectId(&PyId_ps2);  | 
220  | 0  |     if (w != NULL) { | 
221  | 0  |         w = PyObject_Str(w);  | 
222  | 0  |         if (w == NULL)  | 
223  | 0  |             PyErr_Clear();  | 
224  | 0  |         else if (PyUnicode_Check(w)) { | 
225  | 0  |             ps2 = PyUnicode_AsUTF8(w);  | 
226  | 0  |             if (ps2 == NULL) { | 
227  | 0  |                 PyErr_Clear();  | 
228  | 0  |                 ps2 = "";  | 
229  | 0  |             }  | 
230  | 0  |         }  | 
231  | 0  |     }  | 
232  | 0  |     arena = PyArena_New();  | 
233  | 0  |     if (arena == NULL) { | 
234  | 0  |         Py_XDECREF(v);  | 
235  | 0  |         Py_XDECREF(w);  | 
236  | 0  |         Py_XDECREF(oenc);  | 
237  | 0  |         return -1;  | 
238  | 0  |     }  | 
239  | 0  |     mod = PyParser_ASTFromFileObject(fp, filename, enc,  | 
240  | 0  |                                      Py_single_input, ps1, ps2,  | 
241  | 0  |                                      flags, &errcode, arena);  | 
242  | 0  |     Py_XDECREF(v);  | 
243  | 0  |     Py_XDECREF(w);  | 
244  | 0  |     Py_XDECREF(oenc);  | 
245  | 0  |     if (mod == NULL) { | 
246  | 0  |         PyArena_Free(arena);  | 
247  | 0  |         if (errcode == E_EOF) { | 
248  | 0  |             PyErr_Clear();  | 
249  | 0  |             return E_EOF;  | 
250  | 0  |         }  | 
251  | 0  |         return -1;  | 
252  | 0  |     }  | 
253  | 0  |     m = PyImport_AddModuleObject(mod_name);  | 
254  | 0  |     if (m == NULL) { | 
255  | 0  |         PyArena_Free(arena);  | 
256  | 0  |         return -1;  | 
257  | 0  |     }  | 
258  | 0  |     d = PyModule_GetDict(m);  | 
259  | 0  |     v = run_mod(mod, filename, d, d, flags, arena);  | 
260  | 0  |     PyArena_Free(arena);  | 
261  | 0  |     if (v == NULL) { | 
262  | 0  |         return -1;  | 
263  | 0  |     }  | 
264  | 0  |     Py_DECREF(v);  | 
265  | 0  |     flush_io();  | 
266  | 0  |     return 0;  | 
267  | 0  | }  | 
268  |  |  | 
269  |  | int  | 
270  |  | PyRun_InteractiveOneObject(FILE *fp, PyObject *filename, PyCompilerFlags *flags)  | 
271  | 0  | { | 
272  | 0  |     int res;  | 
273  |  | 
  | 
274  | 0  |     res = PyRun_InteractiveOneObjectEx(fp, filename, flags);  | 
275  | 0  |     if (res == -1) { | 
276  | 0  |         PyErr_Print();  | 
277  | 0  |         flush_io();  | 
278  | 0  |     }  | 
279  | 0  |     return res;  | 
280  | 0  | }  | 
281  |  |  | 
282  |  | int  | 
283  |  | PyRun_InteractiveOneFlags(FILE *fp, const char *filename_str, PyCompilerFlags *flags)  | 
284  | 0  | { | 
285  | 0  |     PyObject *filename;  | 
286  | 0  |     int res;  | 
287  |  | 
  | 
288  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
289  | 0  |     if (filename == NULL) { | 
290  | 0  |         PyErr_Print();  | 
291  | 0  |         return -1;  | 
292  | 0  |     }  | 
293  | 0  |     res = PyRun_InteractiveOneObject(fp, filename, flags);  | 
294  | 0  |     Py_DECREF(filename);  | 
295  | 0  |     return res;  | 
296  | 0  | }  | 
297  |  |  | 
298  |  |  | 
299  |  | /* Check whether a file maybe a pyc file: Look at the extension,  | 
300  |  |    the file type, and, if we may close it, at the first few bytes. */  | 
301  |  |  | 
302  |  | static int  | 
303  |  | maybe_pyc_file(FILE *fp, const char* filename, const char* ext, int closeit)  | 
304  | 0  | { | 
305  | 0  |     if (strcmp(ext, ".pyc") == 0)  | 
306  | 0  |         return 1;  | 
307  |  |  | 
308  |  |     /* Only look into the file if we are allowed to close it, since  | 
309  |  |        it then should also be seekable. */  | 
310  | 0  |     if (closeit) { | 
311  |  |         /* Read only two bytes of the magic. If the file was opened in  | 
312  |  |            text mode, the bytes 3 and 4 of the magic (\r\n) might not  | 
313  |  |            be read as they are on disk. */  | 
314  | 0  |         unsigned int halfmagic = PyImport_GetMagicNumber() & 0xFFFF;  | 
315  | 0  |         unsigned char buf[2];  | 
316  |  |         /* Mess:  In case of -x, the stream is NOT at its start now,  | 
317  |  |            and ungetc() was used to push back the first newline,  | 
318  |  |            which makes the current stream position formally undefined,  | 
319  |  |            and a x-platform nightmare.  | 
320  |  |            Unfortunately, we have no direct way to know whether -x  | 
321  |  |            was specified.  So we use a terrible hack:  if the current  | 
322  |  |            stream position is not 0, we assume -x was specified, and  | 
323  |  |            give up.  Bug 132850 on SourceForge spells out the  | 
324  |  |            hopelessness of trying anything else (fseek and ftell  | 
325  |  |            don't work predictably x-platform for text-mode files).  | 
326  |  |         */  | 
327  | 0  |         int ispyc = 0;  | 
328  | 0  |         if (ftell(fp) == 0) { | 
329  | 0  |             if (fread(buf, 1, 2, fp) == 2 &&  | 
330  | 0  |                 ((unsigned int)buf[1]<<8 | buf[0]) == halfmagic)  | 
331  | 0  |                 ispyc = 1;  | 
332  | 0  |             rewind(fp);  | 
333  | 0  |         }  | 
334  | 0  |         return ispyc;  | 
335  | 0  |     }  | 
336  | 0  |     return 0;  | 
337  | 0  | }  | 
338  |  |  | 
339  |  | static int  | 
340  |  | set_main_loader(PyObject *d, const char *filename, const char *loader_name)  | 
341  | 0  | { | 
342  | 0  |     PyObject *filename_obj, *bootstrap, *loader_type = NULL, *loader;  | 
343  | 0  |     int result = 0;  | 
344  |  | 
  | 
345  | 0  |     filename_obj = PyUnicode_DecodeFSDefault(filename);  | 
346  | 0  |     if (filename_obj == NULL)  | 
347  | 0  |         return -1;  | 
348  | 0  |     PyInterpreterState *interp = _PyInterpreterState_Get();  | 
349  | 0  |     bootstrap = PyObject_GetAttrString(interp->importlib,  | 
350  | 0  |                                        "_bootstrap_external");  | 
351  | 0  |     if (bootstrap != NULL) { | 
352  | 0  |         loader_type = PyObject_GetAttrString(bootstrap, loader_name);  | 
353  | 0  |         Py_DECREF(bootstrap);  | 
354  | 0  |     }  | 
355  | 0  |     if (loader_type == NULL) { | 
356  | 0  |         Py_DECREF(filename_obj);  | 
357  | 0  |         return -1;  | 
358  | 0  |     }  | 
359  | 0  |     loader = PyObject_CallFunction(loader_type, "sN", "__main__", filename_obj);  | 
360  | 0  |     Py_DECREF(loader_type);  | 
361  | 0  |     if (loader == NULL) { | 
362  | 0  |         return -1;  | 
363  | 0  |     }  | 
364  | 0  |     if (PyDict_SetItemString(d, "__loader__", loader) < 0) { | 
365  | 0  |         result = -1;  | 
366  | 0  |     }  | 
367  | 0  |     Py_DECREF(loader);  | 
368  | 0  |     return result;  | 
369  | 0  | }  | 
370  |  |  | 
371  |  | int  | 
372  |  | PyRun_SimpleFileExFlags(FILE *fp, const char *filename, int closeit,  | 
373  |  |                         PyCompilerFlags *flags)  | 
374  | 0  | { | 
375  | 0  |     PyObject *m, *d, *v;  | 
376  | 0  |     const char *ext;  | 
377  | 0  |     int set_file_name = 0, ret = -1;  | 
378  | 0  |     size_t len;  | 
379  |  | 
  | 
380  | 0  |     m = PyImport_AddModule("__main__"); | 
381  | 0  |     if (m == NULL)  | 
382  | 0  |         return -1;  | 
383  | 0  |     Py_INCREF(m);  | 
384  | 0  |     d = PyModule_GetDict(m);  | 
385  | 0  |     if (PyDict_GetItemString(d, "__file__") == NULL) { | 
386  | 0  |         PyObject *f;  | 
387  | 0  |         f = PyUnicode_DecodeFSDefault(filename);  | 
388  | 0  |         if (f == NULL)  | 
389  | 0  |             goto done;  | 
390  | 0  |         if (PyDict_SetItemString(d, "__file__", f) < 0) { | 
391  | 0  |             Py_DECREF(f);  | 
392  | 0  |             goto done;  | 
393  | 0  |         }  | 
394  | 0  |         if (PyDict_SetItemString(d, "__cached__", Py_None) < 0) { | 
395  | 0  |             Py_DECREF(f);  | 
396  | 0  |             goto done;  | 
397  | 0  |         }  | 
398  | 0  |         set_file_name = 1;  | 
399  | 0  |         Py_DECREF(f);  | 
400  | 0  |     }  | 
401  | 0  |     len = strlen(filename);  | 
402  | 0  |     ext = filename + len - (len > 4 ? 4 : 0);  | 
403  | 0  |     if (maybe_pyc_file(fp, filename, ext, closeit)) { | 
404  | 0  |         FILE *pyc_fp;  | 
405  |  |         /* Try to run a pyc file. First, re-open in binary */  | 
406  | 0  |         if (closeit)  | 
407  | 0  |             fclose(fp);  | 
408  | 0  |         if ((pyc_fp = _Py_fopen(filename, "rb")) == NULL) { | 
409  | 0  |             fprintf(stderr, "python: Can't reopen .pyc file\n");  | 
410  | 0  |             goto done;  | 
411  | 0  |         }  | 
412  |  |  | 
413  | 0  |         if (set_main_loader(d, filename, "SourcelessFileLoader") < 0) { | 
414  | 0  |             fprintf(stderr, "python: failed to set __main__.__loader__\n");  | 
415  | 0  |             ret = -1;  | 
416  | 0  |             fclose(pyc_fp);  | 
417  | 0  |             goto done;  | 
418  | 0  |         }  | 
419  | 0  |         v = run_pyc_file(pyc_fp, filename, d, d, flags);  | 
420  | 0  |     } else { | 
421  |  |         /* When running from stdin, leave __main__.__loader__ alone */  | 
422  | 0  |         if (strcmp(filename, "<stdin>") != 0 &&  | 
423  | 0  |             set_main_loader(d, filename, "SourceFileLoader") < 0) { | 
424  | 0  |             fprintf(stderr, "python: failed to set __main__.__loader__\n");  | 
425  | 0  |             ret = -1;  | 
426  | 0  |             goto done;  | 
427  | 0  |         }  | 
428  | 0  |         v = PyRun_FileExFlags(fp, filename, Py_file_input, d, d,  | 
429  | 0  |                               closeit, flags);  | 
430  | 0  |     }  | 
431  | 0  |     flush_io();  | 
432  | 0  |     if (v == NULL) { | 
433  | 0  |         Py_CLEAR(m);  | 
434  | 0  |         PyErr_Print();  | 
435  | 0  |         goto done;  | 
436  | 0  |     }  | 
437  | 0  |     Py_DECREF(v);  | 
438  | 0  |     ret = 0;  | 
439  | 0  |   done:  | 
440  | 0  |     if (set_file_name) { | 
441  | 0  |         if (PyDict_DelItemString(d, "__file__")) { | 
442  | 0  |             PyErr_Clear();  | 
443  | 0  |         }  | 
444  | 0  |         if (PyDict_DelItemString(d, "__cached__")) { | 
445  | 0  |             PyErr_Clear();  | 
446  | 0  |         }  | 
447  | 0  |     }  | 
448  | 0  |     Py_XDECREF(m);  | 
449  | 0  |     return ret;  | 
450  | 0  | }  | 
451  |  |  | 
452  |  | int  | 
453  |  | PyRun_SimpleStringFlags(const char *command, PyCompilerFlags *flags)  | 
454  | 0  | { | 
455  | 0  |     PyObject *m, *d, *v;  | 
456  | 0  |     m = PyImport_AddModule("__main__"); | 
457  | 0  |     if (m == NULL)  | 
458  | 0  |         return -1;  | 
459  | 0  |     d = PyModule_GetDict(m);  | 
460  | 0  |     v = PyRun_StringFlags(command, Py_file_input, d, d, flags);  | 
461  | 0  |     if (v == NULL) { | 
462  | 0  |         PyErr_Print();  | 
463  | 0  |         return -1;  | 
464  | 0  |     }  | 
465  | 0  |     Py_DECREF(v);  | 
466  | 0  |     return 0;  | 
467  | 0  | }  | 
468  |  |  | 
469  |  | static int  | 
470  |  | parse_syntax_error(PyObject *err, PyObject **message, PyObject **filename,  | 
471  |  |                    int *lineno, int *offset, PyObject **text)  | 
472  | 0  | { | 
473  | 0  |     int hold;  | 
474  | 0  |     PyObject *v;  | 
475  | 0  |     _Py_IDENTIFIER(msg);  | 
476  | 0  |     _Py_IDENTIFIER(filename);  | 
477  | 0  |     _Py_IDENTIFIER(lineno);  | 
478  | 0  |     _Py_IDENTIFIER(offset);  | 
479  | 0  |     _Py_IDENTIFIER(text);  | 
480  |  | 
  | 
481  | 0  |     *message = NULL;  | 
482  | 0  |     *filename = NULL;  | 
483  |  |  | 
484  |  |     /* new style errors.  `err' is an instance */  | 
485  | 0  |     *message = _PyObject_GetAttrId(err, &PyId_msg);  | 
486  | 0  |     if (!*message)  | 
487  | 0  |         goto finally;  | 
488  |  |  | 
489  | 0  |     v = _PyObject_GetAttrId(err, &PyId_filename);  | 
490  | 0  |     if (!v)  | 
491  | 0  |         goto finally;  | 
492  | 0  |     if (v == Py_None) { | 
493  | 0  |         Py_DECREF(v);  | 
494  | 0  |         *filename = _PyUnicode_FromId(&PyId_string);  | 
495  | 0  |         if (*filename == NULL)  | 
496  | 0  |             goto finally;  | 
497  | 0  |         Py_INCREF(*filename);  | 
498  | 0  |     }  | 
499  | 0  |     else { | 
500  | 0  |         *filename = v;  | 
501  | 0  |     }  | 
502  |  |  | 
503  | 0  |     v = _PyObject_GetAttrId(err, &PyId_lineno);  | 
504  | 0  |     if (!v)  | 
505  | 0  |         goto finally;  | 
506  | 0  |     hold = _PyLong_AsInt(v);  | 
507  | 0  |     Py_DECREF(v);  | 
508  | 0  |     if (hold < 0 && PyErr_Occurred())  | 
509  | 0  |         goto finally;  | 
510  | 0  |     *lineno = hold;  | 
511  |  | 
  | 
512  | 0  |     v = _PyObject_GetAttrId(err, &PyId_offset);  | 
513  | 0  |     if (!v)  | 
514  | 0  |         goto finally;  | 
515  | 0  |     if (v == Py_None) { | 
516  | 0  |         *offset = -1;  | 
517  | 0  |         Py_DECREF(v);  | 
518  | 0  |     } else { | 
519  | 0  |         hold = _PyLong_AsInt(v);  | 
520  | 0  |         Py_DECREF(v);  | 
521  | 0  |         if (hold < 0 && PyErr_Occurred())  | 
522  | 0  |             goto finally;  | 
523  | 0  |         *offset = hold;  | 
524  | 0  |     }  | 
525  |  |  | 
526  | 0  |     v = _PyObject_GetAttrId(err, &PyId_text);  | 
527  | 0  |     if (!v)  | 
528  | 0  |         goto finally;  | 
529  | 0  |     if (v == Py_None) { | 
530  | 0  |         Py_DECREF(v);  | 
531  | 0  |         *text = NULL;  | 
532  | 0  |     }  | 
533  | 0  |     else { | 
534  | 0  |         *text = v;  | 
535  | 0  |     }  | 
536  | 0  |     return 1;  | 
537  |  |  | 
538  | 0  | finally:  | 
539  | 0  |     Py_XDECREF(*message);  | 
540  | 0  |     Py_XDECREF(*filename);  | 
541  | 0  |     return 0;  | 
542  | 0  | }  | 
543  |  |  | 
544  |  | static void  | 
545  |  | print_error_text(PyObject *f, int offset, PyObject *text_obj)  | 
546  | 0  | { | 
547  | 0  |     const char *text;  | 
548  | 0  |     const char *nl;  | 
549  |  | 
  | 
550  | 0  |     text = PyUnicode_AsUTF8(text_obj);  | 
551  | 0  |     if (text == NULL)  | 
552  | 0  |         return;  | 
553  |  |  | 
554  | 0  |     if (offset >= 0) { | 
555  | 0  |         if (offset > 0 && (size_t)offset == strlen(text) && text[offset - 1] == '\n')  | 
556  | 0  |             offset--;  | 
557  | 0  |         for (;;) { | 
558  | 0  |             nl = strchr(text, '\n');  | 
559  | 0  |             if (nl == NULL || nl-text >= offset)  | 
560  | 0  |                 break;  | 
561  | 0  |             offset -= (int)(nl+1-text);  | 
562  | 0  |             text = nl+1;  | 
563  | 0  |         }  | 
564  | 0  |         while (*text == ' ' || *text == '\t' || *text == '\f') { | 
565  | 0  |             text++;  | 
566  | 0  |             offset--;  | 
567  | 0  |         }  | 
568  | 0  |     }  | 
569  | 0  |     PyFile_WriteString("    ", f); | 
570  | 0  |     PyFile_WriteString(text, f);  | 
571  | 0  |     if (*text == '\0' || text[strlen(text)-1] != '\n')  | 
572  | 0  |         PyFile_WriteString("\n", f); | 
573  | 0  |     if (offset == -1)  | 
574  | 0  |         return;  | 
575  | 0  |     PyFile_WriteString("    ", f); | 
576  | 0  |     while (--offset > 0)  | 
577  | 0  |         PyFile_WriteString(" ", f); | 
578  | 0  |     PyFile_WriteString("^\n", f); | 
579  | 0  | }  | 
580  |  |  | 
581  |  |  | 
582  |  | int  | 
583  |  | _Py_HandleSystemExit(int *exitcode_p)  | 
584  | 0  | { | 
585  | 0  |     int inspect = _PyInterpreterState_GET_UNSAFE()->config.inspect;  | 
586  | 0  |     if (inspect) { | 
587  |  |         /* Don't exit if -i flag was given. This flag is set to 0  | 
588  |  |          * when entering interactive mode for inspecting. */  | 
589  | 0  |         return 0;  | 
590  | 0  |     }  | 
591  |  |  | 
592  | 0  |     if (!PyErr_ExceptionMatches(PyExc_SystemExit)) { | 
593  | 0  |         return 0;  | 
594  | 0  |     }  | 
595  |  |  | 
596  | 0  |     PyObject *exception, *value, *tb;  | 
597  | 0  |     PyErr_Fetch(&exception, &value, &tb);  | 
598  |  | 
  | 
599  | 0  |     fflush(stdout);  | 
600  |  | 
  | 
601  | 0  |     int exitcode = 0;  | 
602  | 0  |     if (value == NULL || value == Py_None) { | 
603  | 0  |         goto done;  | 
604  | 0  |     }  | 
605  |  |  | 
606  | 0  |     if (PyExceptionInstance_Check(value)) { | 
607  |  |         /* The error code should be in the `code' attribute. */  | 
608  | 0  |         _Py_IDENTIFIER(code);  | 
609  | 0  |         PyObject *code = _PyObject_GetAttrId(value, &PyId_code);  | 
610  | 0  |         if (code) { | 
611  | 0  |             Py_DECREF(value);  | 
612  | 0  |             value = code;  | 
613  | 0  |             if (value == Py_None)  | 
614  | 0  |                 goto done;  | 
615  | 0  |         }  | 
616  |  |         /* If we failed to dig out the 'code' attribute,  | 
617  |  |            just let the else clause below print the error. */  | 
618  | 0  |     }  | 
619  |  |  | 
620  | 0  |     if (PyLong_Check(value)) { | 
621  | 0  |         exitcode = (int)PyLong_AsLong(value);  | 
622  | 0  |     }  | 
623  | 0  |     else { | 
624  | 0  |         PyObject *sys_stderr = _PySys_GetObjectId(&PyId_stderr);  | 
625  |  |         /* We clear the exception here to avoid triggering the assertion  | 
626  |  |          * in PyObject_Str that ensures it won't silently lose exception  | 
627  |  |          * details.  | 
628  |  |          */  | 
629  | 0  |         PyErr_Clear();  | 
630  | 0  |         if (sys_stderr != NULL && sys_stderr != Py_None) { | 
631  | 0  |             PyFile_WriteObject(value, sys_stderr, Py_PRINT_RAW);  | 
632  | 0  |         } else { | 
633  | 0  |             PyObject_Print(value, stderr, Py_PRINT_RAW);  | 
634  | 0  |             fflush(stderr);  | 
635  | 0  |         }  | 
636  | 0  |         PySys_WriteStderr("\n"); | 
637  | 0  |         exitcode = 1;  | 
638  | 0  |     }  | 
639  |  | 
  | 
640  | 0  |  done:  | 
641  |  |     /* Restore and clear the exception info, in order to properly decref  | 
642  |  |      * the exception, value, and traceback.      If we just exit instead,  | 
643  |  |      * these leak, which confuses PYTHONDUMPREFS output, and may prevent  | 
644  |  |      * some finalizers from running.  | 
645  |  |      */  | 
646  | 0  |     PyErr_Restore(exception, value, tb);  | 
647  | 0  |     PyErr_Clear();  | 
648  | 0  |     *exitcode_p = exitcode;  | 
649  | 0  |     return 1;  | 
650  | 0  | }  | 
651  |  |  | 
652  |  |  | 
653  |  | static void  | 
654  |  | handle_system_exit(void)  | 
655  | 0  | { | 
656  | 0  |     int exitcode;  | 
657  | 0  |     if (_Py_HandleSystemExit(&exitcode)) { | 
658  | 0  |         Py_Exit(exitcode);  | 
659  | 0  |     }  | 
660  | 0  | }  | 
661  |  |  | 
662  |  |  | 
663  |  | static void  | 
664  |  | _PyErr_PrintEx(PyThreadState *tstate, int set_sys_last_vars)  | 
665  | 0  | { | 
666  | 0  |     PyObject *exception, *v, *tb, *hook;  | 
667  |  | 
  | 
668  | 0  |     handle_system_exit();  | 
669  |  | 
  | 
670  | 0  |     _PyErr_Fetch(tstate, &exception, &v, &tb);  | 
671  | 0  |     if (exception == NULL) { | 
672  | 0  |         goto done;  | 
673  | 0  |     }  | 
674  |  |  | 
675  | 0  |     _PyErr_NormalizeException(tstate, &exception, &v, &tb);  | 
676  | 0  |     if (tb == NULL) { | 
677  | 0  |         tb = Py_None;  | 
678  | 0  |         Py_INCREF(tb);  | 
679  | 0  |     }  | 
680  | 0  |     PyException_SetTraceback(v, tb);  | 
681  | 0  |     if (exception == NULL) { | 
682  | 0  |         goto done;  | 
683  | 0  |     }  | 
684  |  |  | 
685  |  |     /* Now we know v != NULL too */  | 
686  | 0  |     if (set_sys_last_vars) { | 
687  | 0  |         if (_PySys_SetObjectId(&PyId_last_type, exception) < 0) { | 
688  | 0  |             _PyErr_Clear(tstate);  | 
689  | 0  |         }  | 
690  | 0  |         if (_PySys_SetObjectId(&PyId_last_value, v) < 0) { | 
691  | 0  |             _PyErr_Clear(tstate);  | 
692  | 0  |         }  | 
693  | 0  |         if (_PySys_SetObjectId(&PyId_last_traceback, tb) < 0) { | 
694  | 0  |             _PyErr_Clear(tstate);  | 
695  | 0  |         }  | 
696  | 0  |     }  | 
697  | 0  |     hook = _PySys_GetObjectId(&PyId_excepthook);  | 
698  | 0  |     if (PySys_Audit("sys.excepthook", "OOOO", hook ? hook : Py_None, | 
699  | 0  |                     exception, v, tb) < 0) { | 
700  | 0  |         if (PyErr_ExceptionMatches(PyExc_RuntimeError)) { | 
701  | 0  |             PyErr_Clear();  | 
702  | 0  |             goto done;  | 
703  | 0  |         }  | 
704  | 0  |         _PyErr_WriteUnraisableMsg("in audit hook", NULL); | 
705  | 0  |     }  | 
706  | 0  |     if (hook) { | 
707  | 0  |         PyObject* stack[3];  | 
708  | 0  |         PyObject *result;  | 
709  |  | 
  | 
710  | 0  |         stack[0] = exception;  | 
711  | 0  |         stack[1] = v;  | 
712  | 0  |         stack[2] = tb;  | 
713  | 0  |         result = _PyObject_FastCall(hook, stack, 3);  | 
714  | 0  |         if (result == NULL) { | 
715  | 0  |             handle_system_exit();  | 
716  |  | 
  | 
717  | 0  |             PyObject *exception2, *v2, *tb2;  | 
718  | 0  |             _PyErr_Fetch(tstate, &exception2, &v2, &tb2);  | 
719  | 0  |             _PyErr_NormalizeException(tstate, &exception2, &v2, &tb2);  | 
720  |  |             /* It should not be possible for exception2 or v2  | 
721  |  |                to be NULL. However PyErr_Display() can't  | 
722  |  |                tolerate NULLs, so just be safe. */  | 
723  | 0  |             if (exception2 == NULL) { | 
724  | 0  |                 exception2 = Py_None;  | 
725  | 0  |                 Py_INCREF(exception2);  | 
726  | 0  |             }  | 
727  | 0  |             if (v2 == NULL) { | 
728  | 0  |                 v2 = Py_None;  | 
729  | 0  |                 Py_INCREF(v2);  | 
730  | 0  |             }  | 
731  | 0  |             fflush(stdout);  | 
732  | 0  |             PySys_WriteStderr("Error in sys.excepthook:\n"); | 
733  | 0  |             PyErr_Display(exception2, v2, tb2);  | 
734  | 0  |             PySys_WriteStderr("\nOriginal exception was:\n"); | 
735  | 0  |             PyErr_Display(exception, v, tb);  | 
736  | 0  |             Py_DECREF(exception2);  | 
737  | 0  |             Py_DECREF(v2);  | 
738  | 0  |             Py_XDECREF(tb2);  | 
739  | 0  |         }  | 
740  | 0  |         Py_XDECREF(result);  | 
741  | 0  |     }  | 
742  | 0  |     else { | 
743  | 0  |         PySys_WriteStderr("sys.excepthook is missing\n"); | 
744  | 0  |         PyErr_Display(exception, v, tb);  | 
745  | 0  |     }  | 
746  |  | 
  | 
747  | 0  | done:  | 
748  | 0  |     Py_XDECREF(exception);  | 
749  | 0  |     Py_XDECREF(v);  | 
750  | 0  |     Py_XDECREF(tb);  | 
751  | 0  | }  | 
752  |  |  | 
753  |  | void  | 
754  |  | _PyErr_Print(PyThreadState *tstate)  | 
755  | 0  | { | 
756  | 0  |     _PyErr_PrintEx(tstate, 1);  | 
757  | 0  | }  | 
758  |  |  | 
759  |  | void  | 
760  |  | PyErr_PrintEx(int set_sys_last_vars)  | 
761  | 0  | { | 
762  | 0  |     PyThreadState *tstate = _PyThreadState_GET();  | 
763  | 0  |     _PyErr_PrintEx(tstate, set_sys_last_vars);  | 
764  | 0  | }  | 
765  |  |  | 
766  |  | void  | 
767  |  | PyErr_Print(void)  | 
768  | 0  | { | 
769  | 0  |     PyErr_PrintEx(1);  | 
770  | 0  | }  | 
771  |  |  | 
772  |  | static void  | 
773  |  | print_exception(PyObject *f, PyObject *value)  | 
774  | 0  | { | 
775  | 0  |     int err = 0;  | 
776  | 0  |     PyObject *type, *tb;  | 
777  | 0  |     _Py_IDENTIFIER(print_file_and_line);  | 
778  |  | 
  | 
779  | 0  |     if (!PyExceptionInstance_Check(value)) { | 
780  | 0  |         err = PyFile_WriteString("TypeError: print_exception(): Exception expected for value, ", f); | 
781  | 0  |         err += PyFile_WriteString(Py_TYPE(value)->tp_name, f);  | 
782  | 0  |         err += PyFile_WriteString(" found\n", f); | 
783  | 0  |         if (err)  | 
784  | 0  |             PyErr_Clear();  | 
785  | 0  |         return;  | 
786  | 0  |     }  | 
787  |  |  | 
788  | 0  |     Py_INCREF(value);  | 
789  | 0  |     fflush(stdout);  | 
790  | 0  |     type = (PyObject *) Py_TYPE(value);  | 
791  | 0  |     tb = PyException_GetTraceback(value);  | 
792  | 0  |     if (tb && tb != Py_None)  | 
793  | 0  |         err = PyTraceBack_Print(tb, f);  | 
794  | 0  |     if (err == 0 &&  | 
795  | 0  |         _PyObject_HasAttrId(value, &PyId_print_file_and_line))  | 
796  | 0  |     { | 
797  | 0  |         PyObject *message, *filename, *text;  | 
798  | 0  |         int lineno, offset;  | 
799  | 0  |         if (!parse_syntax_error(value, &message, &filename,  | 
800  | 0  |                                 &lineno, &offset, &text))  | 
801  | 0  |             PyErr_Clear();  | 
802  | 0  |         else { | 
803  | 0  |             PyObject *line;  | 
804  |  | 
  | 
805  | 0  |             Py_DECREF(value);  | 
806  | 0  |             value = message;  | 
807  |  | 
  | 
808  | 0  |             line = PyUnicode_FromFormat("  File \"%S\", line %d\n", | 
809  | 0  |                                           filename, lineno);  | 
810  | 0  |             Py_DECREF(filename);  | 
811  | 0  |             if (line != NULL) { | 
812  | 0  |                 PyFile_WriteObject(line, f, Py_PRINT_RAW);  | 
813  | 0  |                 Py_DECREF(line);  | 
814  | 0  |             }  | 
815  |  | 
  | 
816  | 0  |             if (text != NULL) { | 
817  | 0  |                 print_error_text(f, offset, text);  | 
818  | 0  |                 Py_DECREF(text);  | 
819  | 0  |             }  | 
820  |  |  | 
821  |  |             /* Can't be bothered to check all those  | 
822  |  |                PyFile_WriteString() calls */  | 
823  | 0  |             if (PyErr_Occurred())  | 
824  | 0  |                 err = -1;  | 
825  | 0  |         }  | 
826  | 0  |     }  | 
827  | 0  |     if (err) { | 
828  |  |         /* Don't do anything else */  | 
829  | 0  |     }  | 
830  | 0  |     else { | 
831  | 0  |         PyObject* moduleName;  | 
832  | 0  |         const char *className;  | 
833  | 0  |         _Py_IDENTIFIER(__module__);  | 
834  | 0  |         assert(PyExceptionClass_Check(type));  | 
835  | 0  |         className = PyExceptionClass_Name(type);  | 
836  | 0  |         if (className != NULL) { | 
837  | 0  |             const char *dot = strrchr(className, '.');  | 
838  | 0  |             if (dot != NULL)  | 
839  | 0  |                 className = dot+1;  | 
840  | 0  |         }  | 
841  |  | 
  | 
842  | 0  |         moduleName = _PyObject_GetAttrId(type, &PyId___module__);  | 
843  | 0  |         if (moduleName == NULL || !PyUnicode_Check(moduleName))  | 
844  | 0  |         { | 
845  | 0  |             Py_XDECREF(moduleName);  | 
846  | 0  |             err = PyFile_WriteString("<unknown>", f); | 
847  | 0  |         }  | 
848  | 0  |         else { | 
849  | 0  |             if (!_PyUnicode_EqualToASCIIId(moduleName, &PyId_builtins))  | 
850  | 0  |             { | 
851  | 0  |                 err = PyFile_WriteObject(moduleName, f, Py_PRINT_RAW);  | 
852  | 0  |                 err += PyFile_WriteString(".", f); | 
853  | 0  |             }  | 
854  | 0  |             Py_DECREF(moduleName);  | 
855  | 0  |         }  | 
856  | 0  |         if (err == 0) { | 
857  | 0  |             if (className == NULL)  | 
858  | 0  |                       err = PyFile_WriteString("<unknown>", f); | 
859  | 0  |             else  | 
860  | 0  |                       err = PyFile_WriteString(className, f);  | 
861  | 0  |         }  | 
862  | 0  |     }  | 
863  | 0  |     if (err == 0 && (value != Py_None)) { | 
864  | 0  |         PyObject *s = PyObject_Str(value);  | 
865  |  |         /* only print colon if the str() of the  | 
866  |  |            object is not the empty string  | 
867  |  |         */  | 
868  | 0  |         if (s == NULL) { | 
869  | 0  |             PyErr_Clear();  | 
870  | 0  |             err = -1;  | 
871  | 0  |             PyFile_WriteString(": <exception str() failed>", f); | 
872  | 0  |         }  | 
873  | 0  |         else if (!PyUnicode_Check(s) ||  | 
874  | 0  |             PyUnicode_GetLength(s) != 0)  | 
875  | 0  |             err = PyFile_WriteString(": ", f); | 
876  | 0  |         if (err == 0)  | 
877  | 0  |           err = PyFile_WriteObject(s, f, Py_PRINT_RAW);  | 
878  | 0  |         Py_XDECREF(s);  | 
879  | 0  |     }  | 
880  |  |     /* try to write a newline in any case */  | 
881  | 0  |     if (err < 0) { | 
882  | 0  |         PyErr_Clear();  | 
883  | 0  |     }  | 
884  | 0  |     err += PyFile_WriteString("\n", f); | 
885  | 0  |     Py_XDECREF(tb);  | 
886  | 0  |     Py_DECREF(value);  | 
887  |  |     /* If an error happened here, don't show it.  | 
888  |  |        XXX This is wrong, but too many callers rely on this behavior. */  | 
889  | 0  |     if (err != 0)  | 
890  | 0  |         PyErr_Clear();  | 
891  | 0  | }  | 
892  |  |  | 
893  |  | static const char cause_message[] =  | 
894  |  |     "\nThe above exception was the direct cause "  | 
895  |  |     "of the following exception:\n\n";  | 
896  |  |  | 
897  |  | static const char context_message[] =  | 
898  |  |     "\nDuring handling of the above exception, "  | 
899  |  |     "another exception occurred:\n\n";  | 
900  |  |  | 
901  |  | static void  | 
902  |  | print_exception_recursive(PyObject *f, PyObject *value, PyObject *seen)  | 
903  | 0  | { | 
904  | 0  |     int err = 0, res;  | 
905  | 0  |     PyObject *cause, *context;  | 
906  |  | 
  | 
907  | 0  |     if (seen != NULL) { | 
908  |  |         /* Exception chaining */  | 
909  | 0  |         PyObject *value_id = PyLong_FromVoidPtr(value);  | 
910  | 0  |         if (value_id == NULL || PySet_Add(seen, value_id) == -1)  | 
911  | 0  |             PyErr_Clear();  | 
912  | 0  |         else if (PyExceptionInstance_Check(value)) { | 
913  | 0  |             PyObject *check_id = NULL;  | 
914  | 0  |             cause = PyException_GetCause(value);  | 
915  | 0  |             context = PyException_GetContext(value);  | 
916  | 0  |             if (cause) { | 
917  | 0  |                 check_id = PyLong_FromVoidPtr(cause);  | 
918  | 0  |                 if (check_id == NULL) { | 
919  | 0  |                     res = -1;  | 
920  | 0  |                 } else { | 
921  | 0  |                     res = PySet_Contains(seen, check_id);  | 
922  | 0  |                     Py_DECREF(check_id);  | 
923  | 0  |                 }  | 
924  | 0  |                 if (res == -1)  | 
925  | 0  |                     PyErr_Clear();  | 
926  | 0  |                 if (res == 0) { | 
927  | 0  |                     print_exception_recursive(  | 
928  | 0  |                         f, cause, seen);  | 
929  | 0  |                     err |= PyFile_WriteString(  | 
930  | 0  |                         cause_message, f);  | 
931  | 0  |                 }  | 
932  | 0  |             }  | 
933  | 0  |             else if (context &&  | 
934  | 0  |                 !((PyBaseExceptionObject *)value)->suppress_context) { | 
935  | 0  |                 check_id = PyLong_FromVoidPtr(context);  | 
936  | 0  |                 if (check_id == NULL) { | 
937  | 0  |                     res = -1;  | 
938  | 0  |                 } else { | 
939  | 0  |                     res = PySet_Contains(seen, check_id);  | 
940  | 0  |                     Py_DECREF(check_id);  | 
941  | 0  |                 }  | 
942  | 0  |                 if (res == -1)  | 
943  | 0  |                     PyErr_Clear();  | 
944  | 0  |                 if (res == 0) { | 
945  | 0  |                     print_exception_recursive(  | 
946  | 0  |                         f, context, seen);  | 
947  | 0  |                     err |= PyFile_WriteString(  | 
948  | 0  |                         context_message, f);  | 
949  | 0  |                 }  | 
950  | 0  |             }  | 
951  | 0  |             Py_XDECREF(context);  | 
952  | 0  |             Py_XDECREF(cause);  | 
953  | 0  |         }  | 
954  | 0  |         Py_XDECREF(value_id);  | 
955  | 0  |     }  | 
956  | 0  |     print_exception(f, value);  | 
957  | 0  |     if (err != 0)  | 
958  | 0  |         PyErr_Clear();  | 
959  | 0  | }  | 
960  |  |  | 
961  |  | void  | 
962  |  | _PyErr_Display(PyObject *file, PyObject *exception, PyObject *value, PyObject *tb)  | 
963  | 0  | { | 
964  | 0  |     assert(file != NULL && file != Py_None);  | 
965  |  | 
  | 
966  | 0  |     PyObject *seen;  | 
967  | 0  |     if (PyExceptionInstance_Check(value)  | 
968  | 0  |         && tb != NULL && PyTraceBack_Check(tb)) { | 
969  |  |         /* Put the traceback on the exception, otherwise it won't get  | 
970  |  |            displayed.  See issue #18776. */  | 
971  | 0  |         PyObject *cur_tb = PyException_GetTraceback(value);  | 
972  | 0  |         if (cur_tb == NULL)  | 
973  | 0  |             PyException_SetTraceback(value, tb);  | 
974  | 0  |         else  | 
975  | 0  |             Py_DECREF(cur_tb);  | 
976  | 0  |     }  | 
977  |  |  | 
978  |  |     /* We choose to ignore seen being possibly NULL, and report  | 
979  |  |        at least the main exception (it could be a MemoryError).  | 
980  |  |     */  | 
981  | 0  |     seen = PySet_New(NULL);  | 
982  | 0  |     if (seen == NULL) { | 
983  | 0  |         PyErr_Clear();  | 
984  | 0  |     }  | 
985  | 0  |     print_exception_recursive(file, value, seen);  | 
986  | 0  |     Py_XDECREF(seen);  | 
987  |  |  | 
988  |  |     /* Call file.flush() */  | 
989  | 0  |     PyObject *res = _PyObject_CallMethodId(file, &PyId_flush, NULL);  | 
990  | 0  |     if (!res) { | 
991  |  |         /* Silently ignore file.flush() error */  | 
992  | 0  |         PyErr_Clear();  | 
993  | 0  |     }  | 
994  | 0  |     else { | 
995  | 0  |         Py_DECREF(res);  | 
996  | 0  |     }  | 
997  | 0  | }  | 
998  |  |  | 
999  |  | void  | 
1000  |  | PyErr_Display(PyObject *exception, PyObject *value, PyObject *tb)  | 
1001  | 0  | { | 
1002  | 0  |     PyObject *file = _PySys_GetObjectId(&PyId_stderr);  | 
1003  | 0  |     if (file == NULL) { | 
1004  | 0  |         _PyObject_Dump(value);  | 
1005  | 0  |         fprintf(stderr, "lost sys.stderr\n");  | 
1006  | 0  |         return;  | 
1007  | 0  |     }  | 
1008  | 0  |     if (file == Py_None) { | 
1009  | 0  |         return;  | 
1010  | 0  |     }  | 
1011  |  |  | 
1012  | 0  |     _PyErr_Display(file, exception, value, tb);  | 
1013  | 0  | }  | 
1014  |  |  | 
1015  |  | PyObject *  | 
1016  |  | PyRun_StringFlags(const char *str, int start, PyObject *globals,  | 
1017  |  |                   PyObject *locals, PyCompilerFlags *flags)  | 
1018  | 2  | { | 
1019  | 2  |     PyObject *ret = NULL;  | 
1020  | 2  |     mod_ty mod;  | 
1021  | 2  |     PyArena *arena;  | 
1022  | 2  |     PyObject *filename;  | 
1023  |  |  | 
1024  | 2  |     filename = _PyUnicode_FromId(&PyId_string); /* borrowed */  | 
1025  | 2  |     if (filename == NULL)  | 
1026  | 0  |         return NULL;  | 
1027  |  |  | 
1028  | 2  |     arena = PyArena_New();  | 
1029  | 2  |     if (arena == NULL)  | 
1030  | 0  |         return NULL;  | 
1031  |  |  | 
1032  | 2  |     mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);  | 
1033  | 2  |     if (mod != NULL)  | 
1034  | 2  |         ret = run_mod(mod, filename, globals, locals, flags, arena);  | 
1035  | 2  |     PyArena_Free(arena);  | 
1036  | 2  |     return ret;  | 
1037  | 2  | }  | 
1038  |  |  | 
1039  |  | PyObject *  | 
1040  |  | PyRun_FileExFlags(FILE *fp, const char *filename_str, int start, PyObject *globals,  | 
1041  |  |                   PyObject *locals, int closeit, PyCompilerFlags *flags)  | 
1042  | 0  | { | 
1043  | 0  |     PyObject *ret = NULL;  | 
1044  | 0  |     mod_ty mod;  | 
1045  | 0  |     PyArena *arena = NULL;  | 
1046  | 0  |     PyObject *filename;  | 
1047  |  | 
  | 
1048  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
1049  | 0  |     if (filename == NULL)  | 
1050  | 0  |         goto exit;  | 
1051  |  |  | 
1052  | 0  |     arena = PyArena_New();  | 
1053  | 0  |     if (arena == NULL)  | 
1054  | 0  |         goto exit;  | 
1055  |  |  | 
1056  | 0  |     mod = PyParser_ASTFromFileObject(fp, filename, NULL, start, 0, 0,  | 
1057  | 0  |                                      flags, NULL, arena);  | 
1058  | 0  |     if (closeit)  | 
1059  | 0  |         fclose(fp);  | 
1060  | 0  |     if (mod == NULL) { | 
1061  | 0  |         goto exit;  | 
1062  | 0  |     }  | 
1063  | 0  |     ret = run_mod(mod, filename, globals, locals, flags, arena);  | 
1064  |  | 
  | 
1065  | 0  | exit:  | 
1066  | 0  |     Py_XDECREF(filename);  | 
1067  | 0  |     if (arena != NULL)  | 
1068  | 0  |         PyArena_Free(arena);  | 
1069  | 0  |     return ret;  | 
1070  | 0  | }  | 
1071  |  |  | 
1072  |  | static void  | 
1073  |  | flush_io(void)  | 
1074  | 0  | { | 
1075  | 0  |     PyObject *f, *r;  | 
1076  | 0  |     PyObject *type, *value, *traceback;  | 
1077  |  |  | 
1078  |  |     /* Save the current exception */  | 
1079  | 0  |     PyErr_Fetch(&type, &value, &traceback);  | 
1080  |  | 
  | 
1081  | 0  |     f = _PySys_GetObjectId(&PyId_stderr);  | 
1082  | 0  |     if (f != NULL) { | 
1083  | 0  |         r = _PyObject_CallMethodId(f, &PyId_flush, NULL);  | 
1084  | 0  |         if (r)  | 
1085  | 0  |             Py_DECREF(r);  | 
1086  | 0  |         else  | 
1087  | 0  |             PyErr_Clear();  | 
1088  | 0  |     }  | 
1089  | 0  |     f = _PySys_GetObjectId(&PyId_stdout);  | 
1090  | 0  |     if (f != NULL) { | 
1091  | 0  |         r = _PyObject_CallMethodId(f, &PyId_flush, NULL);  | 
1092  | 0  |         if (r)  | 
1093  | 0  |             Py_DECREF(r);  | 
1094  | 0  |         else  | 
1095  | 0  |             PyErr_Clear();  | 
1096  | 0  |     }  | 
1097  |  | 
  | 
1098  | 0  |     PyErr_Restore(type, value, traceback);  | 
1099  | 0  | }  | 
1100  |  |  | 
1101  |  | static PyObject *  | 
1102  |  | run_eval_code_obj(PyCodeObject *co, PyObject *globals, PyObject *locals)  | 
1103  | 2  | { | 
1104  | 2  |     PyObject *v;  | 
1105  |  |     /*  | 
1106  |  |      * We explicitly re-initialize _Py_UnhandledKeyboardInterrupt every eval  | 
1107  |  |      * _just in case_ someone is calling into an embedded Python where they  | 
1108  |  |      * don't care about an uncaught KeyboardInterrupt exception (why didn't they  | 
1109  |  |      * leave config.install_signal_handlers set to 0?!?) but then later call  | 
1110  |  |      * Py_Main() itself (which _checks_ this flag and dies with a signal after  | 
1111  |  |      * its interpreter exits).  We don't want a previous embedded interpreter's  | 
1112  |  |      * uncaught exception to trigger an unexplained signal exit from a future  | 
1113  |  |      * Py_Main() based one.  | 
1114  |  |      */  | 
1115  | 2  |     _Py_UnhandledKeyboardInterrupt = 0;  | 
1116  |  |  | 
1117  |  |     /* Set globals['__builtins__'] if it doesn't exist */  | 
1118  | 2  |     if (globals != NULL && PyDict_GetItemString(globals, "__builtins__") == NULL) { | 
1119  | 0  |         PyInterpreterState *interp = _PyInterpreterState_Get();  | 
1120  | 0  |         if (PyDict_SetItemString(globals, "__builtins__", interp->builtins) < 0) { | 
1121  | 0  |             return NULL;  | 
1122  | 0  |         }  | 
1123  | 0  |     }  | 
1124  |  |  | 
1125  | 2  |     v = PyEval_EvalCode((PyObject*)co, globals, locals);  | 
1126  | 2  |     if (!v && PyErr_Occurred() == PyExc_KeyboardInterrupt) { | 
1127  | 0  |         _Py_UnhandledKeyboardInterrupt = 1;  | 
1128  | 0  |     }  | 
1129  | 2  |     return v;  | 
1130  | 2  | }  | 
1131  |  |  | 
1132  |  | static PyObject *  | 
1133  |  | run_mod(mod_ty mod, PyObject *filename, PyObject *globals, PyObject *locals,  | 
1134  |  |             PyCompilerFlags *flags, PyArena *arena)  | 
1135  | 2  | { | 
1136  | 2  |     PyCodeObject *co;  | 
1137  | 2  |     PyObject *v;  | 
1138  | 2  |     co = PyAST_CompileObject(mod, filename, flags, -1, arena);  | 
1139  | 2  |     if (co == NULL)  | 
1140  | 0  |         return NULL;  | 
1141  |  |  | 
1142  | 2  |     if (PySys_Audit("exec", "O", co) < 0) { | 
1143  | 0  |         Py_DECREF(co);  | 
1144  | 0  |         return NULL;  | 
1145  | 0  |     }  | 
1146  |  |  | 
1147  | 2  |     v = run_eval_code_obj(co, globals, locals);  | 
1148  | 2  |     Py_DECREF(co);  | 
1149  | 2  |     return v;  | 
1150  | 2  | }  | 
1151  |  |  | 
1152  |  | static PyObject *  | 
1153  |  | run_pyc_file(FILE *fp, const char *filename, PyObject *globals,  | 
1154  |  |              PyObject *locals, PyCompilerFlags *flags)  | 
1155  | 0  | { | 
1156  | 0  |     PyCodeObject *co;  | 
1157  | 0  |     PyObject *v;  | 
1158  | 0  |     long magic;  | 
1159  | 0  |     long PyImport_GetMagicNumber(void);  | 
1160  |  | 
  | 
1161  | 0  |     magic = PyMarshal_ReadLongFromFile(fp);  | 
1162  | 0  |     if (magic != PyImport_GetMagicNumber()) { | 
1163  | 0  |         if (!PyErr_Occurred())  | 
1164  | 0  |             PyErr_SetString(PyExc_RuntimeError,  | 
1165  | 0  |                        "Bad magic number in .pyc file");  | 
1166  | 0  |         goto error;  | 
1167  | 0  |     }  | 
1168  |  |     /* Skip the rest of the header. */  | 
1169  | 0  |     (void) PyMarshal_ReadLongFromFile(fp);  | 
1170  | 0  |     (void) PyMarshal_ReadLongFromFile(fp);  | 
1171  | 0  |     (void) PyMarshal_ReadLongFromFile(fp);  | 
1172  | 0  |     if (PyErr_Occurred()) { | 
1173  | 0  |         goto error;  | 
1174  | 0  |     }  | 
1175  | 0  |     v = PyMarshal_ReadLastObjectFromFile(fp);  | 
1176  | 0  |     if (v == NULL || !PyCode_Check(v)) { | 
1177  | 0  |         Py_XDECREF(v);  | 
1178  | 0  |         PyErr_SetString(PyExc_RuntimeError,  | 
1179  | 0  |                    "Bad code object in .pyc file");  | 
1180  | 0  |         goto error;  | 
1181  | 0  |     }  | 
1182  | 0  |     fclose(fp);  | 
1183  | 0  |     co = (PyCodeObject *)v;  | 
1184  | 0  |     v = run_eval_code_obj(co, globals, locals);  | 
1185  | 0  |     if (v && flags)  | 
1186  | 0  |         flags->cf_flags |= (co->co_flags & PyCF_MASK);  | 
1187  | 0  |     Py_DECREF(co);  | 
1188  | 0  |     return v;  | 
1189  | 0  | error:  | 
1190  | 0  |     fclose(fp);  | 
1191  | 0  |     return NULL;  | 
1192  | 0  | }  | 
1193  |  |  | 
1194  |  | PyObject *  | 
1195  |  | Py_CompileStringObject(const char *str, PyObject *filename, int start,  | 
1196  |  |                        PyCompilerFlags *flags, int optimize)  | 
1197  | 14  | { | 
1198  | 14  |     PyCodeObject *co;  | 
1199  | 14  |     mod_ty mod;  | 
1200  | 14  |     PyArena *arena = PyArena_New();  | 
1201  | 14  |     if (arena == NULL)  | 
1202  | 0  |         return NULL;  | 
1203  |  |  | 
1204  | 14  |     mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);  | 
1205  | 14  |     if (mod == NULL) { | 
1206  | 0  |         PyArena_Free(arena);  | 
1207  | 0  |         return NULL;  | 
1208  | 0  |     }  | 
1209  | 14  |     if (flags && (flags->cf_flags & PyCF_ONLY_AST)) { | 
1210  | 0  |         PyObject *result = PyAST_mod2obj(mod);  | 
1211  | 0  |         PyArena_Free(arena);  | 
1212  | 0  |         return result;  | 
1213  | 0  |     }  | 
1214  | 14  |     co = PyAST_CompileObject(mod, filename, flags, optimize, arena);  | 
1215  | 14  |     PyArena_Free(arena);  | 
1216  | 14  |     return (PyObject *)co;  | 
1217  | 14  | }  | 
1218  |  |  | 
1219  |  | PyObject *  | 
1220  |  | Py_CompileStringExFlags(const char *str, const char *filename_str, int start,  | 
1221  |  |                         PyCompilerFlags *flags, int optimize)  | 
1222  | 14  | { | 
1223  | 14  |     PyObject *filename, *co;  | 
1224  | 14  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
1225  | 14  |     if (filename == NULL)  | 
1226  | 0  |         return NULL;  | 
1227  | 14  |     co = Py_CompileStringObject(str, filename, start, flags, optimize);  | 
1228  | 14  |     Py_DECREF(filename);  | 
1229  | 14  |     return co;  | 
1230  | 14  | }  | 
1231  |  |  | 
1232  |  | /* For use in Py_LIMITED_API */  | 
1233  |  | #undef Py_CompileString  | 
1234  |  | PyObject *  | 
1235  |  | PyCompileString(const char *str, const char *filename, int start)  | 
1236  | 0  | { | 
1237  | 0  |     return Py_CompileStringFlags(str, filename, start, NULL);  | 
1238  | 0  | }  | 
1239  |  |  | 
1240  |  | const char *  | 
1241  |  | _Py_SourceAsString(PyObject *cmd, const char *funcname, const char *what, PyCompilerFlags *cf, PyObject **cmd_copy)  | 
1242  | 2  | { | 
1243  | 2  |     const char *str;  | 
1244  | 2  |     Py_ssize_t size;  | 
1245  | 2  |     Py_buffer view;  | 
1246  |  |  | 
1247  | 2  |     *cmd_copy = NULL;  | 
1248  | 2  |     if (PyUnicode_Check(cmd)) { | 
1249  | 2  |         cf->cf_flags |= PyCF_IGNORE_COOKIE;  | 
1250  | 2  |         str = PyUnicode_AsUTF8AndSize(cmd, &size);  | 
1251  | 2  |         if (str == NULL)  | 
1252  | 0  |             return NULL;  | 
1253  | 2  |     }  | 
1254  | 0  |     else if (PyBytes_Check(cmd)) { | 
1255  | 0  |         str = PyBytes_AS_STRING(cmd);  | 
1256  | 0  |         size = PyBytes_GET_SIZE(cmd);  | 
1257  | 0  |     }  | 
1258  | 0  |     else if (PyByteArray_Check(cmd)) { | 
1259  | 0  |         str = PyByteArray_AS_STRING(cmd);  | 
1260  | 0  |         size = PyByteArray_GET_SIZE(cmd);  | 
1261  | 0  |     }  | 
1262  | 0  |     else if (PyObject_GetBuffer(cmd, &view, PyBUF_SIMPLE) == 0) { | 
1263  |  |         /* Copy to NUL-terminated buffer. */  | 
1264  | 0  |         *cmd_copy = PyBytes_FromStringAndSize(  | 
1265  | 0  |             (const char *)view.buf, view.len);  | 
1266  | 0  |         PyBuffer_Release(&view);  | 
1267  | 0  |         if (*cmd_copy == NULL) { | 
1268  | 0  |             return NULL;  | 
1269  | 0  |         }  | 
1270  | 0  |         str = PyBytes_AS_STRING(*cmd_copy);  | 
1271  | 0  |         size = PyBytes_GET_SIZE(*cmd_copy);  | 
1272  | 0  |     }  | 
1273  | 0  |     else { | 
1274  | 0  |         PyErr_Format(PyExc_TypeError,  | 
1275  | 0  |             "%s() arg 1 must be a %s object",  | 
1276  | 0  |             funcname, what);  | 
1277  | 0  |         return NULL;  | 
1278  | 0  |     }  | 
1279  |  |  | 
1280  | 2  |     if (strlen(str) != (size_t)size) { | 
1281  | 0  |         PyErr_SetString(PyExc_ValueError,  | 
1282  | 0  |             "source code string cannot contain null bytes");  | 
1283  | 0  |         Py_CLEAR(*cmd_copy);  | 
1284  | 0  |         return NULL;  | 
1285  | 0  |     }  | 
1286  | 2  |     return str;  | 
1287  | 2  | }  | 
1288  |  |  | 
1289  |  | struct symtable *  | 
1290  |  | Py_SymtableStringObject(const char *str, PyObject *filename, int start)  | 
1291  | 0  | { | 
1292  | 0  |     PyCompilerFlags flags = _PyCompilerFlags_INIT;  | 
1293  | 0  |     return _Py_SymtableStringObjectFlags(str, filename, start, &flags);  | 
1294  | 0  | }  | 
1295  |  |  | 
1296  |  | struct symtable *  | 
1297  |  | _Py_SymtableStringObjectFlags(const char *str, PyObject *filename, int start, PyCompilerFlags *flags)  | 
1298  | 0  | { | 
1299  | 0  |     struct symtable *st;  | 
1300  | 0  |     mod_ty mod;  | 
1301  | 0  |     PyArena *arena;  | 
1302  |  | 
  | 
1303  | 0  |     arena = PyArena_New();  | 
1304  | 0  |     if (arena == NULL)  | 
1305  | 0  |         return NULL;  | 
1306  |  |  | 
1307  | 0  |     mod = PyParser_ASTFromStringObject(str, filename, start, flags, arena);  | 
1308  | 0  |     if (mod == NULL) { | 
1309  | 0  |         PyArena_Free(arena);  | 
1310  | 0  |         return NULL;  | 
1311  | 0  |     }  | 
1312  | 0  |     st = PySymtable_BuildObject(mod, filename, 0);  | 
1313  | 0  |     PyArena_Free(arena);  | 
1314  | 0  |     return st;  | 
1315  | 0  | }  | 
1316  |  |  | 
1317  |  | struct symtable *  | 
1318  |  | Py_SymtableString(const char *str, const char *filename_str, int start)  | 
1319  | 0  | { | 
1320  | 0  |     PyObject *filename;  | 
1321  | 0  |     struct symtable *st;  | 
1322  |  | 
  | 
1323  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
1324  | 0  |     if (filename == NULL)  | 
1325  | 0  |         return NULL;  | 
1326  | 0  |     st = Py_SymtableStringObject(str, filename, start);  | 
1327  | 0  |     Py_DECREF(filename);  | 
1328  | 0  |     return st;  | 
1329  | 0  | }  | 
1330  |  |  | 
1331  |  | /* Preferred access to parser is through AST. */  | 
1332  |  | mod_ty  | 
1333  |  | PyParser_ASTFromStringObject(const char *s, PyObject *filename, int start,  | 
1334  |  |                              PyCompilerFlags *flags, PyArena *arena)  | 
1335  | 16  | { | 
1336  | 16  |     mod_ty mod;  | 
1337  | 16  |     PyCompilerFlags localflags = _PyCompilerFlags_INIT;  | 
1338  | 16  |     perrdetail err;  | 
1339  | 16  |     int iflags = PARSER_FLAGS(flags);  | 
1340  | 16  |     if (flags && flags->cf_feature_version < 7)  | 
1341  | 0  |         iflags |= PyPARSE_ASYNC_HACKS;  | 
1342  |  |  | 
1343  | 16  |     node *n = PyParser_ParseStringObject(s, filename,  | 
1344  | 16  |                                          &_PyParser_Grammar, start, &err,  | 
1345  | 16  |                                          &iflags);  | 
1346  | 16  |     if (flags == NULL) { | 
1347  | 14  |         flags = &localflags;  | 
1348  | 14  |     }  | 
1349  | 16  |     if (n) { | 
1350  | 16  |         flags->cf_flags |= iflags & PyCF_MASK;  | 
1351  | 16  |         mod = PyAST_FromNodeObject(n, flags, filename, arena);  | 
1352  | 16  |         PyNode_Free(n);  | 
1353  | 16  |     }  | 
1354  | 0  |     else { | 
1355  | 0  |         err_input(&err);  | 
1356  | 0  |         mod = NULL;  | 
1357  | 0  |     }  | 
1358  | 16  |     err_free(&err);  | 
1359  | 16  |     return mod;  | 
1360  | 16  | }  | 
1361  |  |  | 
1362  |  | mod_ty  | 
1363  |  | PyParser_ASTFromString(const char *s, const char *filename_str, int start,  | 
1364  |  |                        PyCompilerFlags *flags, PyArena *arena)  | 
1365  | 0  | { | 
1366  | 0  |     PyObject *filename;  | 
1367  | 0  |     mod_ty mod;  | 
1368  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
1369  | 0  |     if (filename == NULL)  | 
1370  | 0  |         return NULL;  | 
1371  | 0  |     mod = PyParser_ASTFromStringObject(s, filename, start, flags, arena);  | 
1372  | 0  |     Py_DECREF(filename);  | 
1373  | 0  |     return mod;  | 
1374  | 0  | }  | 
1375  |  |  | 
1376  |  | mod_ty  | 
1377  |  | PyParser_ASTFromFileObject(FILE *fp, PyObject *filename, const char* enc,  | 
1378  |  |                            int start, const char *ps1,  | 
1379  |  |                            const char *ps2, PyCompilerFlags *flags, int *errcode,  | 
1380  |  |                            PyArena *arena)  | 
1381  | 0  | { | 
1382  | 0  |     mod_ty mod;  | 
1383  | 0  |     PyCompilerFlags localflags = _PyCompilerFlags_INIT;  | 
1384  | 0  |     perrdetail err;  | 
1385  | 0  |     int iflags = PARSER_FLAGS(flags);  | 
1386  |  | 
  | 
1387  | 0  |     node *n = PyParser_ParseFileObject(fp, filename, enc,  | 
1388  | 0  |                                        &_PyParser_Grammar,  | 
1389  | 0  |                                        start, ps1, ps2, &err, &iflags);  | 
1390  | 0  |     if (flags == NULL) { | 
1391  | 0  |         flags = &localflags;  | 
1392  | 0  |     }  | 
1393  | 0  |     if (n) { | 
1394  | 0  |         flags->cf_flags |= iflags & PyCF_MASK;  | 
1395  | 0  |         mod = PyAST_FromNodeObject(n, flags, filename, arena);  | 
1396  | 0  |         PyNode_Free(n);  | 
1397  | 0  |     }  | 
1398  | 0  |     else { | 
1399  | 0  |         err_input(&err);  | 
1400  | 0  |         if (errcode)  | 
1401  | 0  |             *errcode = err.error;  | 
1402  | 0  |         mod = NULL;  | 
1403  | 0  |     }  | 
1404  | 0  |     err_free(&err);  | 
1405  | 0  |     return mod;  | 
1406  | 0  | }  | 
1407  |  |  | 
1408  |  | mod_ty  | 
1409  |  | PyParser_ASTFromFile(FILE *fp, const char *filename_str, const char* enc,  | 
1410  |  |                      int start, const char *ps1,  | 
1411  |  |                      const char *ps2, PyCompilerFlags *flags, int *errcode,  | 
1412  |  |                      PyArena *arena)  | 
1413  | 0  | { | 
1414  | 0  |     mod_ty mod;  | 
1415  | 0  |     PyObject *filename;  | 
1416  | 0  |     filename = PyUnicode_DecodeFSDefault(filename_str);  | 
1417  | 0  |     if (filename == NULL)  | 
1418  | 0  |         return NULL;  | 
1419  | 0  |     mod = PyParser_ASTFromFileObject(fp, filename, enc, start, ps1, ps2,  | 
1420  | 0  |                                      flags, errcode, arena);  | 
1421  | 0  |     Py_DECREF(filename);  | 
1422  | 0  |     return mod;  | 
1423  | 0  | }  | 
1424  |  |  | 
1425  |  | /* Simplified interface to parsefile -- return node or set exception */  | 
1426  |  |  | 
1427  |  | node *  | 
1428  |  | PyParser_SimpleParseFileFlags(FILE *fp, const char *filename, int start, int flags)  | 
1429  | 0  | { | 
1430  | 0  |     perrdetail err;  | 
1431  | 0  |     node *n = PyParser_ParseFileFlags(fp, filename, NULL,  | 
1432  | 0  |                                       &_PyParser_Grammar,  | 
1433  | 0  |                                       start, NULL, NULL, &err, flags);  | 
1434  | 0  |     if (n == NULL)  | 
1435  | 0  |         err_input(&err);  | 
1436  | 0  |     err_free(&err);  | 
1437  |  | 
  | 
1438  | 0  |     return n;  | 
1439  | 0  | }  | 
1440  |  |  | 
1441  |  | /* Simplified interface to parsestring -- return node or set exception */  | 
1442  |  |  | 
1443  |  | node *  | 
1444  |  | PyParser_SimpleParseStringFlags(const char *str, int start, int flags)  | 
1445  | 0  | { | 
1446  | 0  |     perrdetail err;  | 
1447  | 0  |     node *n = PyParser_ParseStringFlags(str, &_PyParser_Grammar,  | 
1448  | 0  |                                         start, &err, flags);  | 
1449  | 0  |     if (n == NULL)  | 
1450  | 0  |         err_input(&err);  | 
1451  | 0  |     err_free(&err);  | 
1452  | 0  |     return n;  | 
1453  | 0  | }  | 
1454  |  |  | 
1455  |  | node *  | 
1456  |  | PyParser_SimpleParseStringFlagsFilename(const char *str, const char *filename,  | 
1457  |  |                                         int start, int flags)  | 
1458  | 0  | { | 
1459  | 0  |     perrdetail err;  | 
1460  | 0  |     node *n = PyParser_ParseStringFlagsFilename(str, filename,  | 
1461  | 0  |                             &_PyParser_Grammar, start, &err, flags);  | 
1462  | 0  |     if (n == NULL)  | 
1463  | 0  |         err_input(&err);  | 
1464  | 0  |     err_free(&err);  | 
1465  | 0  |     return n;  | 
1466  | 0  | }  | 
1467  |  |  | 
1468  |  | /* May want to move a more generalized form of this to parsetok.c or  | 
1469  |  |    even parser modules. */  | 
1470  |  |  | 
1471  |  | void  | 
1472  |  | PyParser_ClearError(perrdetail *err)  | 
1473  | 0  | { | 
1474  | 0  |     err_free(err);  | 
1475  | 0  | }  | 
1476  |  |  | 
1477  |  | void  | 
1478  |  | PyParser_SetError(perrdetail *err)  | 
1479  | 0  | { | 
1480  | 0  |     err_input(err);  | 
1481  | 0  | }  | 
1482  |  |  | 
1483  |  | static void  | 
1484  |  | err_free(perrdetail *err)  | 
1485  | 16  | { | 
1486  | 16  |     Py_CLEAR(err->filename);  | 
1487  | 16  | }  | 
1488  |  |  | 
1489  |  | /* Set the error appropriate to the given input error code (see errcode.h) */  | 
1490  |  |  | 
1491  |  | static void  | 
1492  |  | err_input(perrdetail *err)  | 
1493  | 0  | { | 
1494  | 0  |     PyObject *v, *w, *errtype, *errtext;  | 
1495  | 0  |     PyObject *msg_obj = NULL;  | 
1496  | 0  |     const char *msg = NULL;  | 
1497  | 0  |     int offset = err->offset;  | 
1498  |  | 
  | 
1499  | 0  |     errtype = PyExc_SyntaxError;  | 
1500  | 0  |     switch (err->error) { | 
1501  | 0  |     case E_ERROR:  | 
1502  | 0  |         goto cleanup;  | 
1503  | 0  |     case E_SYNTAX:  | 
1504  | 0  |         errtype = PyExc_IndentationError;  | 
1505  | 0  |         if (err->expected == INDENT)  | 
1506  | 0  |             msg = "expected an indented block";  | 
1507  | 0  |         else if (err->token == INDENT)  | 
1508  | 0  |             msg = "unexpected indent";  | 
1509  | 0  |         else if (err->token == DEDENT)  | 
1510  | 0  |             msg = "unexpected unindent";  | 
1511  | 0  |         else if (err->expected == NOTEQUAL) { | 
1512  | 0  |             errtype = PyExc_SyntaxError;  | 
1513  | 0  |             msg = "with Barry as BDFL, use '<>' instead of '!='";  | 
1514  | 0  |         }  | 
1515  | 0  |         else { | 
1516  | 0  |             errtype = PyExc_SyntaxError;  | 
1517  | 0  |             msg = "invalid syntax";  | 
1518  | 0  |         }  | 
1519  | 0  |         break;  | 
1520  | 0  |     case E_TOKEN:  | 
1521  | 0  |         msg = "invalid token";  | 
1522  | 0  |         break;  | 
1523  | 0  |     case E_EOFS:  | 
1524  | 0  |         msg = "EOF while scanning triple-quoted string literal";  | 
1525  | 0  |         break;  | 
1526  | 0  |     case E_EOLS:  | 
1527  | 0  |         msg = "EOL while scanning string literal";  | 
1528  | 0  |         break;  | 
1529  | 0  |     case E_INTR:  | 
1530  | 0  |         if (!PyErr_Occurred())  | 
1531  | 0  |             PyErr_SetNone(PyExc_KeyboardInterrupt);  | 
1532  | 0  |         goto cleanup;  | 
1533  | 0  |     case E_NOMEM:  | 
1534  | 0  |         PyErr_NoMemory();  | 
1535  | 0  |         goto cleanup;  | 
1536  | 0  |     case E_EOF:  | 
1537  | 0  |         msg = "unexpected EOF while parsing";  | 
1538  | 0  |         break;  | 
1539  | 0  |     case E_TABSPACE:  | 
1540  | 0  |         errtype = PyExc_TabError;  | 
1541  | 0  |         msg = "inconsistent use of tabs and spaces in indentation";  | 
1542  | 0  |         break;  | 
1543  | 0  |     case E_OVERFLOW:  | 
1544  | 0  |         msg = "expression too long";  | 
1545  | 0  |         break;  | 
1546  | 0  |     case E_DEDENT:  | 
1547  | 0  |         errtype = PyExc_IndentationError;  | 
1548  | 0  |         msg = "unindent does not match any outer indentation level";  | 
1549  | 0  |         break;  | 
1550  | 0  |     case E_TOODEEP:  | 
1551  | 0  |         errtype = PyExc_IndentationError;  | 
1552  | 0  |         msg = "too many levels of indentation";  | 
1553  | 0  |         break;  | 
1554  | 0  |     case E_DECODE: { | 
1555  | 0  |         PyObject *type, *value, *tb;  | 
1556  | 0  |         PyErr_Fetch(&type, &value, &tb);  | 
1557  | 0  |         msg = "unknown decode error";  | 
1558  | 0  |         if (value != NULL)  | 
1559  | 0  |             msg_obj = PyObject_Str(value);  | 
1560  | 0  |         Py_XDECREF(type);  | 
1561  | 0  |         Py_XDECREF(value);  | 
1562  | 0  |         Py_XDECREF(tb);  | 
1563  | 0  |         break;  | 
1564  | 0  |     }  | 
1565  | 0  |     case E_LINECONT:  | 
1566  | 0  |         msg = "unexpected character after line continuation character";  | 
1567  | 0  |         break;  | 
1568  |  |  | 
1569  | 0  |     case E_IDENTIFIER:  | 
1570  | 0  |         msg = "invalid character in identifier";  | 
1571  | 0  |         break;  | 
1572  | 0  |     case E_BADSINGLE:  | 
1573  | 0  |         msg = "multiple statements found while compiling a single statement";  | 
1574  | 0  |         break;  | 
1575  | 0  |     default:  | 
1576  | 0  |         fprintf(stderr, "error=%d\n", err->error);  | 
1577  | 0  |         msg = "unknown parsing error";  | 
1578  | 0  |         break;  | 
1579  | 0  |     }  | 
1580  |  |     /* err->text may not be UTF-8 in case of decoding errors.  | 
1581  |  |        Explicitly convert to an object. */  | 
1582  | 0  |     if (!err->text) { | 
1583  | 0  |         errtext = Py_None;  | 
1584  | 0  |         Py_INCREF(Py_None);  | 
1585  | 0  |     } else { | 
1586  | 0  |         errtext = PyUnicode_DecodeUTF8(err->text, err->offset,  | 
1587  | 0  |                                        "replace");  | 
1588  | 0  |         if (errtext != NULL) { | 
1589  | 0  |             Py_ssize_t len = strlen(err->text);  | 
1590  | 0  |             offset = (int)PyUnicode_GET_LENGTH(errtext);  | 
1591  | 0  |             if (len != err->offset) { | 
1592  | 0  |                 Py_DECREF(errtext);  | 
1593  | 0  |                 errtext = PyUnicode_DecodeUTF8(err->text, len,  | 
1594  | 0  |                                                "replace");  | 
1595  | 0  |             }  | 
1596  | 0  |         }  | 
1597  | 0  |     }  | 
1598  | 0  |     v = Py_BuildValue("(OiiN)", err->filename, | 
1599  | 0  |                       err->lineno, offset, errtext);  | 
1600  | 0  |     if (v != NULL) { | 
1601  | 0  |         if (msg_obj)  | 
1602  | 0  |             w = Py_BuildValue("(OO)", msg_obj, v); | 
1603  | 0  |         else  | 
1604  | 0  |             w = Py_BuildValue("(sO)", msg, v); | 
1605  | 0  |     } else  | 
1606  | 0  |         w = NULL;  | 
1607  | 0  |     Py_XDECREF(v);  | 
1608  | 0  |     PyErr_SetObject(errtype, w);  | 
1609  | 0  |     Py_XDECREF(w);  | 
1610  | 0  | cleanup:  | 
1611  | 0  |     Py_XDECREF(msg_obj);  | 
1612  | 0  |     if (err->text != NULL) { | 
1613  | 0  |         PyObject_FREE(err->text);  | 
1614  | 0  |         err->text = NULL;  | 
1615  | 0  |     }  | 
1616  | 0  | }  | 
1617  |  |  | 
1618  |  |  | 
1619  |  | #if defined(USE_STACKCHECK)  | 
1620  |  | #if defined(WIN32) && defined(_MSC_VER)  | 
1621  |  |  | 
1622  |  | /* Stack checking for Microsoft C */  | 
1623  |  |  | 
1624  |  | #include <malloc.h>  | 
1625  |  | #include <excpt.h>  | 
1626  |  |  | 
1627  |  | /*  | 
1628  |  |  * Return non-zero when we run out of memory on the stack; zero otherwise.  | 
1629  |  |  */  | 
1630  |  | int  | 
1631  |  | PyOS_CheckStack(void)  | 
1632  |  | { | 
1633  |  |     __try { | 
1634  |  |         /* alloca throws a stack overflow exception if there's  | 
1635  |  |            not enough space left on the stack */  | 
1636  |  |         alloca(PYOS_STACK_MARGIN * sizeof(void*));  | 
1637  |  |         return 0;  | 
1638  |  |     } __except (GetExceptionCode() == STATUS_STACK_OVERFLOW ?  | 
1639  |  |                     EXCEPTION_EXECUTE_HANDLER :  | 
1640  |  |             EXCEPTION_CONTINUE_SEARCH) { | 
1641  |  |         int errcode = _resetstkoflw();  | 
1642  |  |         if (errcode == 0)  | 
1643  |  |         { | 
1644  |  |             Py_FatalError("Could not reset the stack!"); | 
1645  |  |         }  | 
1646  |  |     }  | 
1647  |  |     return 1;  | 
1648  |  | }  | 
1649  |  |  | 
1650  |  | #endif /* WIN32 && _MSC_VER */  | 
1651  |  |  | 
1652  |  | /* Alternate implementations can be added here... */  | 
1653  |  |  | 
1654  |  | #endif /* USE_STACKCHECK */  | 
1655  |  |  | 
1656  |  | /* Deprecated C API functions still provided for binary compatibility */  | 
1657  |  |  | 
1658  |  | #undef PyParser_SimpleParseFile  | 
1659  |  | PyAPI_FUNC(node *)  | 
1660  |  | PyParser_SimpleParseFile(FILE *fp, const char *filename, int start)  | 
1661  | 0  | { | 
1662  | 0  |     return PyParser_SimpleParseFileFlags(fp, filename, start, 0);  | 
1663  | 0  | }  | 
1664  |  |  | 
1665  |  | #undef PyParser_SimpleParseString  | 
1666  |  | PyAPI_FUNC(node *)  | 
1667  |  | PyParser_SimpleParseString(const char *str, int start)  | 
1668  | 0  | { | 
1669  | 0  |     return PyParser_SimpleParseStringFlags(str, start, 0);  | 
1670  | 0  | }  | 
1671  |  |  | 
1672  |  | #undef PyRun_AnyFile  | 
1673  |  | PyAPI_FUNC(int)  | 
1674  |  | PyRun_AnyFile(FILE *fp, const char *name)  | 
1675  | 0  | { | 
1676  | 0  |     return PyRun_AnyFileExFlags(fp, name, 0, NULL);  | 
1677  | 0  | }  | 
1678  |  |  | 
1679  |  | #undef PyRun_AnyFileEx  | 
1680  |  | PyAPI_FUNC(int)  | 
1681  |  | PyRun_AnyFileEx(FILE *fp, const char *name, int closeit)  | 
1682  | 0  | { | 
1683  | 0  |     return PyRun_AnyFileExFlags(fp, name, closeit, NULL);  | 
1684  | 0  | }  | 
1685  |  |  | 
1686  |  | #undef PyRun_AnyFileFlags  | 
1687  |  | PyAPI_FUNC(int)  | 
1688  |  | PyRun_AnyFileFlags(FILE *fp, const char *name, PyCompilerFlags *flags)  | 
1689  | 0  | { | 
1690  | 0  |     return PyRun_AnyFileExFlags(fp, name, 0, flags);  | 
1691  | 0  | }  | 
1692  |  |  | 
1693  |  | #undef PyRun_File  | 
1694  |  | PyAPI_FUNC(PyObject *)  | 
1695  |  | PyRun_File(FILE *fp, const char *p, int s, PyObject *g, PyObject *l)  | 
1696  | 0  | { | 
1697  | 0  |     return PyRun_FileExFlags(fp, p, s, g, l, 0, NULL);  | 
1698  | 0  | }  | 
1699  |  |  | 
1700  |  | #undef PyRun_FileEx  | 
1701  |  | PyAPI_FUNC(PyObject *)  | 
1702  |  | PyRun_FileEx(FILE *fp, const char *p, int s, PyObject *g, PyObject *l, int c)  | 
1703  | 0  | { | 
1704  | 0  |     return PyRun_FileExFlags(fp, p, s, g, l, c, NULL);  | 
1705  | 0  | }  | 
1706  |  |  | 
1707  |  | #undef PyRun_FileFlags  | 
1708  |  | PyAPI_FUNC(PyObject *)  | 
1709  |  | PyRun_FileFlags(FILE *fp, const char *p, int s, PyObject *g, PyObject *l,  | 
1710  |  |                 PyCompilerFlags *flags)  | 
1711  | 0  | { | 
1712  | 0  |     return PyRun_FileExFlags(fp, p, s, g, l, 0, flags);  | 
1713  | 0  | }  | 
1714  |  |  | 
1715  |  | #undef PyRun_SimpleFile  | 
1716  |  | PyAPI_FUNC(int)  | 
1717  |  | PyRun_SimpleFile(FILE *f, const char *p)  | 
1718  | 0  | { | 
1719  | 0  |     return PyRun_SimpleFileExFlags(f, p, 0, NULL);  | 
1720  | 0  | }  | 
1721  |  |  | 
1722  |  | #undef PyRun_SimpleFileEx  | 
1723  |  | PyAPI_FUNC(int)  | 
1724  |  | PyRun_SimpleFileEx(FILE *f, const char *p, int c)  | 
1725  | 0  | { | 
1726  | 0  |     return PyRun_SimpleFileExFlags(f, p, c, NULL);  | 
1727  | 0  | }  | 
1728  |  |  | 
1729  |  |  | 
1730  |  | #undef PyRun_String  | 
1731  |  | PyAPI_FUNC(PyObject *)  | 
1732  |  | PyRun_String(const char *str, int s, PyObject *g, PyObject *l)  | 
1733  | 0  | { | 
1734  | 0  |     return PyRun_StringFlags(str, s, g, l, NULL);  | 
1735  | 0  | }  | 
1736  |  |  | 
1737  |  | #undef PyRun_SimpleString  | 
1738  |  | PyAPI_FUNC(int)  | 
1739  |  | PyRun_SimpleString(const char *s)  | 
1740  | 0  | { | 
1741  | 0  |     return PyRun_SimpleStringFlags(s, NULL);  | 
1742  | 0  | }  | 
1743  |  |  | 
1744  |  | #undef Py_CompileString  | 
1745  |  | PyAPI_FUNC(PyObject *)  | 
1746  |  | Py_CompileString(const char *str, const char *p, int s)  | 
1747  | 0  | { | 
1748  | 0  |     return Py_CompileStringExFlags(str, p, s, NULL, -1);  | 
1749  | 0  | }  | 
1750  |  |  | 
1751  |  | #undef Py_CompileStringFlags  | 
1752  |  | PyAPI_FUNC(PyObject *)  | 
1753  |  | Py_CompileStringFlags(const char *str, const char *p, int s,  | 
1754  |  |                       PyCompilerFlags *flags)  | 
1755  | 0  | { | 
1756  | 0  |     return Py_CompileStringExFlags(str, p, s, flags, -1);  | 
1757  | 0  | }  | 
1758  |  |  | 
1759  |  | #undef PyRun_InteractiveOne  | 
1760  |  | PyAPI_FUNC(int)  | 
1761  |  | PyRun_InteractiveOne(FILE *f, const char *p)  | 
1762  | 0  | { | 
1763  | 0  |     return PyRun_InteractiveOneFlags(f, p, NULL);  | 
1764  | 0  | }  | 
1765  |  |  | 
1766  |  | #undef PyRun_InteractiveLoop  | 
1767  |  | PyAPI_FUNC(int)  | 
1768  |  | PyRun_InteractiveLoop(FILE *f, const char *p)  | 
1769  | 0  | { | 
1770  |  |     return PyRun_InteractiveLoopFlags(f, p, NULL);  | 
1771  | 0  | }  | 
1772  |  |  | 
1773  |  | #ifdef __cplusplus  | 
1774  |  | }  | 
1775  |  | #endif  |