Mercurial > cpython-lru_cache-weakref
annotate Python/symtable.c @ 20492:bf4ff05eab52 legacy-trunk
For debug build, check that the stack pointer never exceeds the stack size.
| author | Jeremy Hylton <jeremy@alum.mit.edu> |
|---|---|
| date | Wed, 17 Oct 2001 13:29:30 +0000 |
| parents | 3faabf54b8b8 |
| children | 5e25c669741c |
| rev | line source |
|---|---|
|
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1 #include "Python.h" |
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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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Fix for bug 133489: compiler leaks memory
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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_lineno = lineno; |
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49 switch (type) { |
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50 case funcdef: |
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51 case lambdef: |
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52 ste->ste_type = TYPE_FUNCTION; |
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53 break; |
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54 case classdef: |
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55 ste->ste_type = TYPE_CLASS; |
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56 break; |
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57 case single_input: |
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58 case eval_input: |
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59 case file_input: |
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60 ste->ste_type = TYPE_MODULE; |
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61 break; |
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62 } |
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63 |
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64 if (st->st_cur == NULL) |
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65 ste->ste_nested = 0; |
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66 else if (st->st_cur->ste_nested |
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67 || st->st_cur->ste_type == TYPE_FUNCTION) |
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68 ste->ste_nested = 1; |
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69 else |
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70 ste->ste_nested = 0; |
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71 ste->ste_child_free = 0; |
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Merging the gen-branch into the main line, at Guido's direction. Yay!
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72 ste->ste_generator = 0; |
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73 |
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74 if (PyDict_SetItem(st->st_symbols, ste->ste_id, (PyObject *)ste) < 0) |
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75 goto fail; |
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76 |
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77 return (PyObject *)ste; |
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78 fail: |
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79 Py_XDECREF(ste); |
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80 return NULL; |
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81 } |
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82 |
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83 static PyObject * |
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84 ste_repr(PySymtableEntryObject *ste) |
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85 { |
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86 char buf[256]; |
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87 |
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88 sprintf(buf, "<symtable entry %.100s(%ld), line %d>", |
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89 PyString_AS_STRING(ste->ste_name), |
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90 PyInt_AS_LONG(ste->ste_id), |
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91 ste->ste_lineno); |
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92 return PyString_FromString(buf); |
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93 } |
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94 |
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95 static void |
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96 ste_dealloc(PySymtableEntryObject *ste) |
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97 { |
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98 ste->ste_table = NULL; |
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99 Py_XDECREF(ste->ste_id); |
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100 Py_XDECREF(ste->ste_name); |
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101 Py_XDECREF(ste->ste_symbols); |
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102 Py_XDECREF(ste->ste_varnames); |
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103 Py_XDECREF(ste->ste_children); |
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104 PyObject_Del(ste); |
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105 } |
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106 |
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107 #define OFF(x) offsetof(PySymtableEntryObject, x) |
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108 |
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109 static PyMemberDef ste_memberlist[] = { |
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110 {"id", T_OBJECT, OFF(ste_id), READONLY}, |
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111 {"name", T_OBJECT, OFF(ste_name), READONLY}, |
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112 {"symbols", T_OBJECT, OFF(ste_symbols), READONLY}, |
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113 {"varnames", T_OBJECT, OFF(ste_varnames), READONLY}, |
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114 {"children", T_OBJECT, OFF(ste_children), READONLY}, |
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115 {"type", T_INT, OFF(ste_type), READONLY}, |
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116 {"lineno", T_INT, OFF(ste_lineno), READONLY}, |
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117 {"optimized",T_INT, OFF(ste_optimized), READONLY}, |
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118 {"nested", T_INT, OFF(ste_nested), READONLY}, |
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119 {NULL} |
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120 }; |
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121 |
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122 PyTypeObject PySymtableEntry_Type = { |
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123 PyObject_HEAD_INIT(&PyType_Type) |
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124 0, |
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125 "symtable entry", |
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126 sizeof(PySymtableEntryObject), |
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127 0, |
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128 (destructor)ste_dealloc, /* tp_dealloc */ |
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129 0, /* tp_print */ |
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130 0, /* tp_getattr */ |
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131 0, /* tp_setattr */ |
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132 0, /* tp_compare */ |
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133 (reprfunc)ste_repr, /* tp_repr */ |
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134 0, /* tp_as_number */ |
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135 0, /* tp_as_sequence */ |
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136 0, /* tp_as_mapping */ |
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137 0, /* tp_hash */ |
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138 0, /* tp_call */ |
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139 0, /* tp_str */ |
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140 PyObject_GenericGetAttr, /* tp_getattro */ |
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141 0, /* tp_setattro */ |
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142 0, /* tp_as_buffer */ |
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143 Py_TPFLAGS_DEFAULT, /* tp_flags */ |
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144 0, /* tp_doc */ |
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145 0, /* tp_traverse */ |
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146 0, /* tp_clear */ |
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147 0, /* tp_richcompare */ |
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148 0, /* tp_weaklistoffset */ |
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149 0, /* tp_iter */ |
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150 0, /* tp_iternext */ |
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151 0, /* tp_methods */ |
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152 ste_memberlist, /* tp_members */ |
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153 0, /* tp_getset */ |
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154 0, /* tp_base */ |
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155 0, /* tp_dict */ |
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156 0, /* tp_descr_get */ |
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157 0, /* tp_descr_set */ |
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158 0, /* tp_dictoffset */ |
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159 0, /* tp_init */ |
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160 0, /* tp_alloc */ |
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161 0, /* tp_new */ |
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162 }; |
