Mercurial > cpython-lru_cache-weakref

annotate Python/symtable.c @ 21314:4d5098cfa781 legacy-trunk

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PySymtableEntry_New(): I'm not sure what this routine is doing, but it was obviously leaking an int object when whatever the heck it's looking for was found. Repaired that. This accounts for why entering function and class definitions at an interactive prompt leaked a reference to the integer 1 each time. Bugfix candidate.
author Tim Peters <tim.peters@gmail.com>
date Sat, 08 Dec 2001 23:40:38 +0000
parents 485422900ef0
children 8a26bb369f53
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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a47d93ef103a Relax the rules for using 'from ... import *' and exec in the presence
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1 #include "Python.h"
16799
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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51977af230fa Fix for bug 133489: compiler leaks memory
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17 if (v) /* XXX could check that name, type, lineno match */ {
21314
4d5098cfa781 PySymtableEntry_New(): I'm not sure what this routine is doing, but it
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18 Py_DECREF(k);
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19 Py_INCREF(v);
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20 return v;
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21 }
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22
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23 ste = (PySymtableEntryObject *)PyObject_New(PySymtableEntryObject,
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24 &PySymtableEntry_Type);
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25 ste->ste_table = st;
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26 ste->ste_id = k;
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27
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28 v = PyString_FromString(name);
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29 if (v == NULL)
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30 goto fail;
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31 ste->ste_name = v;
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32
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33 v = PyDict_New();
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34 if (v == NULL)
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35 goto fail;
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36 ste->ste_symbols = v;
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37
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38 v = PyList_New(0);
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39 if (v == NULL)
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40 goto fail;
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41 ste->ste_varnames = v;
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42
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43 v = PyList_New(0);
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44 if (v == NULL)
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45 goto fail;
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46 ste->ste_children = v;
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47
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5a1230de436a Preliminary support for future nested scopes
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48 ste->ste_optimized = 0;
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485422900ef0 SF bug #488687 reported by Neal Norwitz
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49 ste->ste_opt_lineno = 0;
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50 ste->ste_lineno = lineno;
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51 switch (type) {
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52 case funcdef:
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53 case lambdef:
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54 ste->ste_type = TYPE_FUNCTION;
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55 break;
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56 case classdef:
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57 ste->ste_type = TYPE_CLASS;
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58 break;
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59 case single_input:
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60 case eval_input:
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61 case file_input:
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62 ste->ste_type = TYPE_MODULE;
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63 break;
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64 }
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65
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66 if (st->st_cur == NULL)
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67 ste->ste_nested = 0;
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68 else if (st->st_cur->ste_nested
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69 || st->st_cur->ste_type == TYPE_FUNCTION)
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70 ste->ste_nested = 1;
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71 else
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72 ste->ste_nested = 0;
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73 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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74 ste->ste_generator = 0;
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75
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76 if (PyDict_SetItem(st->st_symbols, ste->ste_id, (PyObject *)ste) < 0)
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77 goto fail;
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78
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79 return (PyObject *)ste;
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80 fail:
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81 Py_XDECREF(ste);
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82 return NULL;
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83 }
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84
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85 static PyObject *
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86 ste_repr(PySymtableEntryObject *ste)
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87 {
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88 char buf[256];
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89
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90 PyOS_snprintf(buf, sizeof(buf),
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91 "<symtable entry %.100s(%ld), line %d>",
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92 PyString_AS_STRING(ste->ste_name),
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93 PyInt_AS_LONG(ste->ste_id),
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94 ste->ste_lineno);
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95 return PyString_FromString(buf);
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96 }
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97
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98 static void
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99 ste_dealloc(PySymtableEntryObject *ste)
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100 {
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101 ste->ste_table = NULL;
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102 Py_XDECREF(ste->ste_id);
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103 Py_XDECREF(ste->ste_name);
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104 Py_XDECREF(ste->ste_symbols);
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105 Py_XDECREF(ste->ste_varnames);
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106 Py_XDECREF(ste->ste_children);
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107 PyObject_Del(ste);
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108 }
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109
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110 #define OFF(x) offsetof(PySymtableEntryObject, x)
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111
20012
3faabf54b8b8 Add optional docstrings to member descriptors. For backwards
Guido van Rossum <guido@python.org>
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112 static PyMemberDef ste_memberlist[] = {
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113 {"id", T_OBJECT, OFF(ste_id), READONLY},
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114 {"name", T_OBJECT, OFF(ste_name), READONLY},
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115 {"symbols", T_OBJECT, OFF(ste_symbols), READONLY},
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116 {"varnames", T_OBJECT, OFF(ste_varnames), READONLY},
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117 {"children", T_OBJECT, OFF(ste_children), READONLY},
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118 {"type", T_INT, OFF(ste_type), READONLY},
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119 {"lineno", T_INT, OFF(ste_lineno), READONLY},
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120 {"optimized",T_INT, OFF(ste_optimized), READONLY},
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121 {"nested", T_INT, OFF(ste_nested), READONLY},
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122 {NULL}
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123 };
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124
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125 PyTypeObject PySymtableEntry_Type = {
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126 PyObject_HEAD_INIT(&PyType_Type)
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127 0,
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128 "symtable entry",
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129 sizeof(PySymtableEntryObject),
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130 0,
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131 (destructor)ste_dealloc, /* tp_dealloc */
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132 0, /* tp_print */
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133 0, /* tp_getattr */
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134 0, /* tp_setattr */
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135 0, /* tp_compare */
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136 (reprfunc)ste_repr, /* tp_repr */
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137 0, /* tp_as_number */
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138 0, /* tp_as_sequence */
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139 0, /* tp_as_mapping */
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140 0, /* tp_hash */
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141 0, /* tp_call */
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142 0, /* tp_str */
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143 PyObject_GenericGetAttr, /* tp_getattro */
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144 0, /* tp_setattro */
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145 0, /* tp_as_buffer */
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146 Py_TPFLAGS_DEFAULT, /* tp_flags */
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147 0, /* tp_doc */
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148 0, /* tp_traverse */
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149 0, /* tp_clear */
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150 0, /* tp_richcompare */
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151 0, /* tp_weaklistoffset */
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152 0, /* tp_iter */
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153 0, /* tp_iternext */
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154 0, /* tp_methods */
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155 ste_memberlist, /* tp_members */
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156 0, /* tp_getset */
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157 0, /* tp_base */
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158 0, /* tp_dict */
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159 0, /* tp_descr_get */
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160 0, /* tp_descr_set */
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161 0, /* tp_dictoffset */
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162 0, /* tp_init */
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163 0, /* tp_alloc */
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164 0, /* tp_new */
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165 };