Mercurial > cpython-lru_cache-weakref

annotate Python/traceback.c @ 58627:75bb2f1691c0 2.6

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Merged revisions 77892 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r77892 | victor.stinner | 2010-01-31 23:32:15 +0100 (dim., 31 janv. 2010) | 4 lines Issue #7819: Check sys.call_tracing() arguments types. py3k was already patched by issue #3661. ........
author Victor Stinner <victor.stinner@haypocalc.com>
date Sun, 31 Jan 2010 22:33:22 +0000
parents fb80b281e05a
children e38335d4df91 9ef683d41c9b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1
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2 /* Traceback implementation */
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3
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4 #include "Python.h"
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5
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6 #include "code.h"
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7 #include "frameobject.h"
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8 #include "structmember.h"
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9 #include "osdefs.h"
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10 #include "traceback.h"
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12 #define OFF(x) offsetof(PyTracebackObject, x)
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14 static PyMemberDef tb_memberlist[] = {
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15 {"tb_next", T_OBJECT, OFF(tb_next), READONLY},
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16 {"tb_frame", T_OBJECT, OFF(tb_frame), READONLY},
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17 {"tb_lasti", T_INT, OFF(tb_lasti), READONLY},
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18 {"tb_lineno", T_INT, OFF(tb_lineno), READONLY},
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19 {NULL} /* Sentinel */
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20 };
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21
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22 static void
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23 tb_dealloc(PyTracebackObject *tb)
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24 {
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25 PyObject_GC_UnTrack(tb);
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26 Py_TRASHCAN_SAFE_BEGIN(tb)
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27 Py_XDECREF(tb->tb_next);
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28 Py_XDECREF(tb->tb_frame);
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29 PyObject_GC_Del(tb);
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30 Py_TRASHCAN_SAFE_END(tb)
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31 }
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32
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33 static int
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34 tb_traverse(PyTracebackObject *tb, visitproc visit, void *arg)
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35 {
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36 Py_VISIT(tb->tb_next);
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37 Py_VISIT(tb->tb_frame);
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38 return 0;
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39 }
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41 static void
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42 tb_clear(PyTracebackObject *tb)
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43 {
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44 Py_CLEAR(tb->tb_next);
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45 Py_CLEAR(tb->tb_frame);
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46 }
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47
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48 PyTypeObject PyTraceBack_Type = {
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49 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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50 "traceback",
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51 sizeof(PyTracebackObject),
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52 0,
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53 (destructor)tb_dealloc, /*tp_dealloc*/
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54 0, /*tp_print*/
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55 0, /*tp_getattr*/
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56 0, /*tp_setattr*/
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57 0, /*tp_compare*/
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58 0, /*tp_repr*/
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59 0, /*tp_as_number*/
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60 0, /*tp_as_sequence*/
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61 0, /*tp_as_mapping*/
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62 0, /* tp_hash */
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63 0, /* tp_call */
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64 0, /* tp_str */
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65 0, /* tp_getattro */
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66 0, /* tp_setattro */
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67 0, /* tp_as_buffer */
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68 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
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69 0, /* tp_doc */
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70 (traverseproc)tb_traverse, /* tp_traverse */
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71 (inquiry)tb_clear, /* tp_clear */
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72 0, /* tp_richcompare */
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73 0, /* tp_weaklistoffset */
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74 0, /* tp_iter */
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75 0, /* tp_iternext */
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76 0, /* tp_methods */
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77 tb_memberlist, /* tp_members */
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78 0, /* tp_getset */
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79 0, /* tp_base */
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80 0, /* tp_dict */
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81 };
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82
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83 static PyTracebackObject *
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84 newtracebackobject(PyTracebackObject *next, PyFrameObject *frame)
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85 {
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86 PyTracebackObject *tb;
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87 if ((next != NULL && !PyTraceBack_Check(next)) ||
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88 frame == NULL || !PyFrame_Check(frame)) {
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89 PyErr_BadInternalCall();
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90 return NULL;
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91 }
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92 tb = PyObject_GC_New(PyTracebackObject, &PyTraceBack_Type);
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93 if (tb != NULL) {
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94 Py_XINCREF(next);
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95 tb->tb_next = next;
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96 Py_XINCREF(frame);
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97 tb->tb_frame = frame;
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98 tb->tb_lasti = frame->f_lasti;
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99 tb->tb_lineno = PyCode_Addr2Line(frame->f_code,
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100 frame->f_lasti);
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101 PyObject_GC_Track(tb);
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102 }
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103 return tb;
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104 }
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105
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106 int
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107 PyTraceBack_Here(PyFrameObject *frame)
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108 {
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109 PyThreadState *tstate = PyThreadState_GET();
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110 PyTracebackObject *oldtb = (PyTracebackObject *) tstate->curexc_traceback;
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111 PyTracebackObject *tb = newtracebackobject(oldtb, frame);
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112 if (tb == NULL)
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113 return -1;
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114 tstate->curexc_traceback = (PyObject *)tb;
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115 Py_XDECREF(oldtb);
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116 return 0;
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117 }
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118
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119 int
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120 _Py_DisplaySourceLine(PyObject *f, const char *filename, int lineno, int indent)
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121 {
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122 int err = 0;
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123 FILE *xfp = NULL;
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124 char linebuf[2000];
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125 int i;
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126 char namebuf[MAXPATHLEN+1];
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127
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128 if (filename == NULL)
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129 return -1;
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130 /* This is needed by Emacs' compile command */
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131 #define FMT " File \"%.500s\", line %d, in %.500s\n"
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132 xfp = fopen(filename, "r" PY_STDIOTEXTMODE);
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133 if (xfp == NULL) {
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134 /* Search tail of filename in sys.path before giving up */
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135 PyObject *path;
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136 const char *tail = strrchr(filename, SEP);
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137 if (tail == NULL)
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138 tail = filename;
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139 else
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140 tail++;
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141 path = PySys_GetObject("path");
424922afc1bb Quickly renamed.
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diff changeset
142 if (path != NULL && PyList_Check(path)) {
36521
30aef3ce2b26 Use Py_ssize_t to count the
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diff changeset
143 Py_ssize_t _npath = PyList_Size(path);
30aef3ce2b26 Use Py_ssize_t to count the
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diff changeset
144 int npath = Py_SAFE_DOWNCAST(_npath, Py_ssize_t, int);
13096
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145 size_t taillen = strlen(tail);
674
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146 for (i = 0; i < npath; i++) {
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147 PyObject *v = PyList_GetItem(path, i);
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148 if (v == NULL) {
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149 PyErr_Clear();
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150 break;
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151 }
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152 if (PyString_Check(v)) {
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153 size_t len;
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diff changeset
154 len = PyString_GET_SIZE(v);
1909
0c232194a64f * Python/traceback.c: security fix -- check for buffer oveflow
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diff changeset
155 if (len + 1 + taillen >= MAXPATHLEN)
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156 continue; /* Too long */
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diff changeset
157 strcpy(namebuf, PyString_AsString(v));
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diff changeset
158 if (strlen(namebuf) != len)
1909
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diff changeset
159 continue; /* v contains '\0' */
674
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diff changeset
160 if (len > 0 && namebuf[len-1] != SEP)
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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161 namebuf[len++] = SEP;
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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162 strcpy(namebuf+len, tail);
23029
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Jack Jansen <jack.jansen@cwi.nl>
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diff changeset
163 xfp = fopen(namebuf, "r" PY_STDIOTEXTMODE);
674
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164 if (xfp != NULL) {
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165 filename = namebuf;
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166 break;
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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167 }
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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168 }
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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169 }
4e2d239dc64c Move printing of filename and lineno to tb_displayline.
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170 }
86
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171 }
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172
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173 if (xfp == NULL)
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174 return err;
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175 if (err != 0) {
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176 fclose(xfp);
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177 return err;
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178 }
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179
86
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180 for (i = 0; i < lineno; i++) {
11294
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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diff changeset
181 char* pLastChar = &linebuf[sizeof(linebuf)-2];
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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diff changeset
182 do {
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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183 *pLastChar = '\0';
23029
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diff changeset
184 if (Py_UniversalNewlineFgets(linebuf, sizeof linebuf, xfp, NULL) == NULL)
11294
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diff changeset
185 break;
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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diff changeset
186 /* fgets read *something*; if it didn't get as
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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diff changeset
187 far as pLastChar, it must have found a newline
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diff changeset
188 or hit the end of the file; if pLastChar is \n,
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diff changeset
189 it obviously found a newline; else we haven't
d3696bf08eee Tim Peters fixed PR#75: very long lines cause incorrect tracebacks.
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diff changeset
190 yet seen a newline, so must continue */
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diff changeset
191 } while (*pLastChar != '\0' && *pLastChar != '\n');
86
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192 }
a6934380c6e7 "Compiling" version
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193 if (i == lineno) {
47933
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diff changeset
194 char buf[11];
674
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195 char *p = linebuf;
2811
07fc4fefb683 ignore control-l (parallelling change to tokenizer.c)
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diff changeset
196 while (*p == ' ' || *p == '\t' || *p == '\014')
86
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197 p++;
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198
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diff changeset
199 /* Write some spaces before the line */
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diff changeset
200 strcpy(buf, " ");
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
201 assert (strlen(buf) == 10);
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diff changeset
202 while (indent > 0) {
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents: 47527
diff changeset
203 if(indent < 10)
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
204 buf[indent] = '\0';
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
205 err = PyFile_WriteString(buf, f);
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
206 if (err != 0)
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
207 break;
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diff changeset
208 indent -= 10;
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diff changeset
209 }
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
210
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
211 if (err == 0)
4f804ee772eb #3342: In tracebacks, printed source lines were not indented since r62555.
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diff changeset
212 err = PyFile_WriteString(p, f);
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diff changeset
213 if (err == 0 && strchr(p, '\n') == NULL)
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diff changeset
214 err = PyFile_WriteString("\n", f);
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215 }
a6934380c6e7 "Compiling" version
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216 fclose(xfp);
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diff changeset
217 return err;
86
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218 }
a6934380c6e7 "Compiling" version
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219
5608
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diff changeset
220 static int
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diff changeset
221 tb_displayline(PyObject *f, const char *filename, int lineno, const char *name)
86
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222 {
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diff changeset
223 int err = 0;
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diff changeset
224 char linebuf[2000];
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diff changeset
225
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
226 if (filename == NULL || name == NULL)
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diff changeset
227 return -1;
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
228 /* This is needed by Emacs' compile command */
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
229 #define FMT " File \"%.500s\", line %d, in %.500s\n"
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
230 PyOS_snprintf(linebuf, sizeof(linebuf), FMT, filename, lineno, name);
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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parents: 44739
diff changeset
231 err = PyFile_WriteString(linebuf, f);
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parents: 44739
diff changeset
232 if (err != 0)
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diff changeset
233 return err;
47933
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diff changeset
234 return _Py_DisplaySourceLine(f, filename, lineno, 4);
46414
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diff changeset
235 }
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
236
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
237 static int
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
238 tb_printinternal(PyTracebackObject *tb, PyObject *f, long limit)
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parents: 44739
diff changeset
239 {
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
240 int err = 0;
840064802952 Re-implement the 'warnings' module in C. This allows for usage of the
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diff changeset
241 long depth = 0;
31739
49ec0d8f08ec Moved tracebackobject to traceback.h, Closes SF Bug #497067
Nicholas Bastin <nick.bastin@gmail.com>
parents: 30968
diff changeset
242 PyTracebackObject *tb1 = tb;
1425
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
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parents: 1257
diff changeset
243 while (tb1 != NULL) {
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
Guido van Rossum <guido@python.org>
parents: 1257
diff changeset
244 depth++;
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
Guido van Rossum <guido@python.org>
parents: 1257
diff changeset
245 tb1 = tb1->tb_next;
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
Guido van Rossum <guido@python.org>
parents: 1257
diff changeset
246 }
5608
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diff changeset
247 while (tb != NULL && err == 0) {
5046
658815230546 Get the line number from PyCode_Addr2Line instead of believing
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
248 if (depth <= limit) {
5608
79e49cbce2ef PyFile_WriteString now returns an error indicator instead of calling
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parents: 5405
diff changeset
249 err = tb_displayline(f,
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47294
diff changeset
250 PyString_AsString(
5372
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parents: 5317
diff changeset
251 tb->tb_frame->f_code->co_filename),
1831
216b755515e6 add function name to traceback info
Guido van Rossum <guido@python.org>
parents: 1425
diff changeset
252 tb->tb_lineno,
47527
52294af4b663 This reverts r63675 based on the discussion in this thread:
Gregory P. Smith <greg@mad-scientist.com>
parents: 47294
diff changeset
253 PyString_AsString(tb->tb_frame->f_code->co_name));
5046
658815230546 Get the line number from PyCode_Addr2Line instead of believing
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
254 }
1425
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
Guido van Rossum <guido@python.org>
parents: 1257
diff changeset
255 depth--;
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diff changeset
256 tb = tb->tb_next;
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diff changeset
257 if (err == 0)
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diff changeset
258 err = PyErr_CheckSignals();
86
a6934380c6e7 "Compiling" version
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diff changeset
259 }
5608
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diff changeset
260 return err;
86
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261 }
a6934380c6e7 "Compiling" version
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262
a6934380c6e7 "Compiling" version
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diff changeset
263 int
13658
f79434ee41fa Mass ANSIfication of function definitions. Doesn't cover all 'extern'
Thomas Wouters <thomas@python.org>
parents: 13256
diff changeset
264 PyTraceBack_Print(PyObject *v, PyObject *f)
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265 {
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diff changeset
266 int err;
5372
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diff changeset
267 PyObject *limitv;
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268 long limit = 1000;
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269 if (v == NULL)
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270 return 0;
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57b51966a4f1 Removed two pointless and obfuscating macros.
Tim Peters <tim.peters@gmail.com>
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271 if (!PyTraceBack_Check(v)) {
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272 PyErr_BadInternalCall();
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273 return -1;
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274 }
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275 limitv = PySys_GetObject("tracebacklimit");
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276 if (limitv && PyInt_Check(limitv)) {
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277 limit = PyInt_AsLong(limitv);
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Guido van Rossum <guido@python.org>
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278 if (limit <= 0)
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
Guido van Rossum <guido@python.org>
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279 return 0;
72bddfad351a * mpzmodule.c: cast some methods to the proper type.
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280 }
12137
5b5581af951c Change traceback error message to "most recent call last" from
Guido van Rossum <guido@python.org>
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281 err = PyFile_WriteString("Traceback (most recent call last):\n", f);
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Guido van Rossum <guido@python.org>
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282 if (!err)
31739
49ec0d8f08ec Moved tracebackobject to traceback.h, Closes SF Bug #497067
Nicholas Bastin <nick.bastin@gmail.com>
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283 err = tb_printinternal((PyTracebackObject *)v, f, limit);
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284 return err;
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285 }