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annotate Python/symtable.c @ 21179:485422900ef0 legacy-trunk

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SF bug #488687 reported by Neal Norwitz The error for assignment to __debug__ used ste->ste_opt_lineno instead of n->n_lineno. The latter was at best incorrect; often the slot was uninitialized. Two fixes here: Use the correct lineno for the error. Initialize ste_opt_lineno in PySymtable_New(); while there are no current cases where it is referenced unless it has already been assigned to, there is no harm in initializing it.
author Jeremy Hylton <jeremy@alum.mit.edu>
date Tue, 04 Dec 2001 02:41:46 +0000
parents 5e25c669741c
children 4d5098cfa781
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1 #include "Python.h"
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08d937107fe6 Improved __future__ parser; still more to do
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2 #include "compile.h"
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3 #include "symtable.h"
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4 #include "graminit.h"
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5 #include "structmember.h"
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6
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7 PyObject *
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8 PySymtableEntry_New(struct symtable *st, char *name, int type, int lineno)
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9 {
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10 PySymtableEntryObject *ste = NULL;
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11 PyObject *k, *v;
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12
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13 k = PyInt_FromLong(st->st_nscopes++);
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14 if (k == NULL)
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15 goto fail;
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16 v = PyDict_GetItem(st->st_symbols, k);
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17 if (v) /* XXX could check that name, type, lineno match */ {
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18 Py_INCREF(v);
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19 return v;
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20 }
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21
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22 ste = (PySymtableEntryObject *)PyObject_New(PySymtableEntryObject,
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23 &PySymtableEntry_Type);
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24 ste->ste_table = st;
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25 ste->ste_id = k;
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26
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27 v = PyString_FromString(name);
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28 if (v == NULL)
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29 goto fail;
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30 ste->ste_name = v;
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31
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32 v = PyDict_New();
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33 if (v == NULL)
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34 goto fail;
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35 ste->ste_symbols = v;
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36
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37 v = PyList_New(0);
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38 if (v == NULL)
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39 goto fail;
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40 ste->ste_varnames = v;
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41
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42 v = PyList_New(0);
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43 if (v == NULL)
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44 goto fail;
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45 ste->ste_children = v;
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46
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47 ste->ste_optimized = 0;
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48 ste->ste_opt_lineno = 0;
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49 ste->ste_lineno = lineno;
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50 switch (type) {
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51 case funcdef:
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52 case lambdef:
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53 ste->ste_type = TYPE_FUNCTION;
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54 break;
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55 case classdef:
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56 ste->ste_type = TYPE_CLASS;
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57 break;
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58 case single_input:
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59 case eval_input:
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60 case file_input:
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61 ste->ste_type = TYPE_MODULE;
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62 break;
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63 }
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64
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65 if (st->st_cur == NULL)
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66 ste->ste_nested = 0;
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67 else if (st->st_cur->ste_nested
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68 || st->st_cur->ste_type == TYPE_FUNCTION)
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69 ste->ste_nested = 1;
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70 else
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71 ste->ste_nested = 0;
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72 ste->ste_child_free = 0;
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7bc473b2c654 Merging the gen-branch into the main line, at Guido's direction. Yay!
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73 ste->ste_generator = 0;
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74
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75 if (PyDict_SetItem(st->st_symbols, ste->ste_id, (PyObject *)ste) < 0)
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76 goto fail;
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77
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78 return (PyObject *)ste;
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79 fail:
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80 Py_XDECREF(ste);
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81 return NULL;
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82 }
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83
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84 static PyObject *
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85 ste_repr(PySymtableEntryObject *ste)
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86 {
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87 char buf[256];
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88
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89 PyOS_snprintf(buf, sizeof(buf),
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90 "<symtable entry %.100s(%ld), line %d>",
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91 PyString_AS_STRING(ste->ste_name),
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92 PyInt_AS_LONG(ste->ste_id),
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93 ste->ste_lineno);
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94 return PyString_FromString(buf);
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95 }
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96
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97 static void
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98 ste_dealloc(PySymtableEntryObject *ste)
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99 {
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100 ste->ste_table = NULL;
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101 Py_XDECREF(ste->ste_id);
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102 Py_XDECREF(ste->ste_name);
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103 Py_XDECREF(ste->ste_symbols);
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104 Py_XDECREF(ste->ste_varnames);
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105 Py_XDECREF(ste->ste_children);
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106 PyObject_Del(ste);
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107 }
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108
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109 #define OFF(x) offsetof(PySymtableEntryObject, x)
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110
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3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
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111 static PyMemberDef ste_memberlist[] = {
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112 {"id", T_OBJECT, OFF(ste_id), READONLY},
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113 {"name", T_OBJECT, OFF(ste_name), READONLY},
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114 {"symbols", T_OBJECT, OFF(ste_symbols), READONLY},
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115 {"varnames", T_OBJECT, OFF(ste_varnames), READONLY},
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116 {"children", T_OBJECT, OFF(ste_children), READONLY},
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117 {"type", T_INT, OFF(ste_type), READONLY},
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118 {"lineno", T_INT, OFF(ste_lineno), READONLY},
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119 {"optimized",T_INT, OFF(ste_optimized), READONLY},
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120 {"nested", T_INT, OFF(ste_nested), READONLY},
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121 {NULL}
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122 };
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123
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124 PyTypeObject PySymtableEntry_Type = {
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125 PyObject_HEAD_INIT(&PyType_Type)
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126 0,
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127 "symtable entry",
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128 sizeof(PySymtableEntryObject),
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129 0,
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130 (destructor)ste_dealloc, /* tp_dealloc */
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131 0, /* tp_print */
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132 0, /* tp_getattr */
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133 0, /* tp_setattr */
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134 0, /* tp_compare */
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135 (reprfunc)ste_repr, /* tp_repr */
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136 0, /* tp_as_number */
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137 0, /* tp_as_sequence */
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138 0, /* tp_as_mapping */
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139 0, /* tp_hash */
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140 0, /* tp_call */
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141 0, /* tp_str */
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142 PyObject_GenericGetAttr, /* tp_getattro */
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143 0, /* tp_setattro */
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144 0, /* tp_as_buffer */
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145 Py_TPFLAGS_DEFAULT, /* tp_flags */
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146 0, /* tp_doc */
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147 0, /* tp_traverse */
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148 0, /* tp_clear */
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149 0, /* tp_richcompare */
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150 0, /* tp_weaklistoffset */
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151 0, /* tp_iter */
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152 0, /* tp_iternext */
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153 0, /* tp_methods */
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154 ste_memberlist, /* tp_members */
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155 0, /* tp_getset */
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156 0, /* tp_base */
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157 0, /* tp_dict */
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158 0, /* tp_descr_get */
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159 0, /* tp_descr_set */
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160 0, /* tp_dictoffset */
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161 0, /* tp_init */
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162 0, /* tp_alloc */
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163 0, /* tp_new */
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164 };