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comparison Python/errors.c @ 48474:2ee09afee126

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implement chained exception tracebacks patch from Antoine Pitrou #3112
author Benjamin Peterson <benjamin@python.org>
date Tue, 15 Jul 2008 15:32:09 +0000
parents 7ba7901dad7f
children 1ec38b707cd6
comparison
equal deleted inserted replaced
48473:7d570df5e90a 48474:2ee09afee126
82 Py_XDECREF(value); 82 Py_XDECREF(value);
83 if (fixed_value == NULL) 83 if (fixed_value == NULL)
84 return; 84 return;
85 value = fixed_value; 85 value = fixed_value;
86 } 86 }
87 Py_INCREF(tstate->exc_value); 87 /* Avoid reference cycles through the context chain.
88 PyException_SetContext(value, tstate->exc_value); 88 This is O(chain length) but context chains are
89 usually very short. Sensitive readers may try
90 to inline the call to PyException_GetContext. */
91 if (tstate->exc_value != value) {
92 PyObject *o = tstate->exc_value, *context;
93 while ((context = PyException_GetContext(o))) {
94 Py_DECREF(context);
95 if (context == value) {
96 PyException_SetContext(o, NULL);
97 break;
98 }
99 o = context;
100 }
101 Py_INCREF(tstate->exc_value);
102 PyException_SetContext(value, tstate->exc_value);
103 }
89 } 104 }
90 if (value != NULL && PyExceptionInstance_Check(value)) 105 if (value != NULL && PyExceptionInstance_Check(value))
91 tb = PyException_GetTraceback(value); 106 tb = PyException_GetTraceback(value);
92 Py_XINCREF(exception); 107 Py_XINCREF(exception);
93 PyErr_Restore(exception, value, tb); 108 PyErr_Restore(exception, value, tb);
158 } 173 }
159 174
160 175
161 /* Used in many places to normalize a raised exception, including in 176 /* Used in many places to normalize a raised exception, including in
162 eval_code2(), do_raise(), and PyErr_Print() 177 eval_code2(), do_raise(), and PyErr_Print()
178
179 XXX: should PyErr_NormalizeException() also call
180 PyException_SetTraceback() with the resulting value and tb?
163 */ 181 */
164 void 182 void
165 PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb) 183 PyErr_NormalizeException(PyObject **exc, PyObject **val, PyObject **tb)
166 { 184 {
167 PyObject *type = *exc; 185 PyObject *type = *exc;