Mercurial > cpython-lru_cache-weakref

annotate Python/traceback.c @ 84172:e353f64dfd95

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importlib.abc.SourceLoader.get_source() was re-raising SyntaxError and UnicodeDecodeError as ImportError. That was over-reaching the point of raising ImportError in get_source() (which is to signal the source code was not found when it should have). Conflating the two exceptions with ImportError could lead to masking errors with the source which should be known outside of whether there was an error simply getting the source to begin with.
author Brett Cannon <brett@python.org>
date Sun, 16 Jun 2013 18:05:54 -0400
parents ef5dd5bda323
children 2e42c0a39321
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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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 #ifdef HAVE_FCNTL_H
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11 #include <fcntl.h>
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12 #endif
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13
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14 #define OFF(x) offsetof(PyTracebackObject, x)
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15
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16 #define PUTS(fd, str) write(fd, str, (int)strlen(str))
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17 #define MAX_STRING_LENGTH 500
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18 #define MAX_FRAME_DEPTH 100
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19 #define MAX_NTHREADS 100
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20
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21 /* Function from Parser/tokenizer.c */
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22 extern char * PyTokenizer_FindEncodingFilename(int, PyObject *);
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23
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24 static PyObject *
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25 tb_dir(PyTracebackObject *self)
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26 {
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27 return Py_BuildValue("[ssss]", "tb_frame", "tb_next",
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28 "tb_lasti", "tb_lineno");
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29 }
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30
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31 static PyMethodDef tb_methods[] = {
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32 {"__dir__", (PyCFunction)tb_dir, METH_NOARGS},
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33 {NULL, NULL, 0, NULL},
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34 };
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35
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36 static PyMemberDef tb_memberlist[] = {
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37 {"tb_next", T_OBJECT, OFF(tb_next), READONLY},
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38 {"tb_frame", T_OBJECT, OFF(tb_frame), READONLY},
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39 {"tb_lasti", T_INT, OFF(tb_lasti), READONLY},
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40 {"tb_lineno", T_INT, OFF(tb_lineno), READONLY},
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41 {NULL} /* Sentinel */
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42 };
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44 static void
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45 tb_dealloc(PyTracebackObject *tb)
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46 {
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47 PyObject_GC_UnTrack(tb);
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48 Py_TRASHCAN_SAFE_BEGIN(tb)
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49 Py_XDECREF(tb->tb_next);
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50 Py_XDECREF(tb->tb_frame);
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51 PyObject_GC_Del(tb);
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52 Py_TRASHCAN_SAFE_END(tb)
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53 }
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55 static int
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56 tb_traverse(PyTracebackObject *tb, visitproc visit, void *arg)
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57 {
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58 Py_VISIT(tb->tb_next);
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59 Py_VISIT(tb->tb_frame);
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60 return 0;
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61 }
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62
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63 static void
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64 tb_clear(PyTracebackObject *tb)
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65 {
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66 Py_CLEAR(tb->tb_next);
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67 Py_CLEAR(tb->tb_frame);
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68 }
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69
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70 PyTypeObject PyTraceBack_Type = {
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71 PyVarObject_HEAD_INIT(&PyType_Type, 0)
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72 "traceback",
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73 sizeof(PyTracebackObject),
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74 0,
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75 (destructor)tb_dealloc, /*tp_dealloc*/
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76 0, /*tp_print*/
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77 0, /*tp_getattr*/
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78 0, /*tp_setattr*/
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79 0, /*tp_reserved*/
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80 0, /*tp_repr*/
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81 0, /*tp_as_number*/
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82 0, /*tp_as_sequence*/
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83 0, /*tp_as_mapping*/
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84 0, /* tp_hash */
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85 0, /* tp_call */
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86 0, /* tp_str */
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87 PyObject_GenericGetAttr, /* tp_getattro */
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88 0, /* tp_setattro */
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89 0, /* tp_as_buffer */
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90 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
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91 0, /* tp_doc */
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92 (traverseproc)tb_traverse, /* tp_traverse */
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93 (inquiry)tb_clear, /* tp_clear */
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94 0, /* tp_richcompare */
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95 0, /* tp_weaklistoffset */
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96 0, /* tp_iter */
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97 0, /* tp_iternext */
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98 tb_methods, /* tp_methods */
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99 tb_memberlist, /* tp_members */
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100 0, /* tp_getset */
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101 0, /* tp_base */
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102 0, /* tp_dict */
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103 };
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104
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105 static PyTracebackObject *
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106 newtracebackobject(PyTracebackObject *next, PyFrameObject *frame)
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107 {
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108 PyTracebackObject *tb;
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109 if ((next != NULL && !PyTraceBack_Check(next)) ||
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110 frame == NULL || !PyFrame_Check(frame)) {
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111 PyErr_BadInternalCall();
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112 return NULL;
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113 }
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114 tb = PyObject_GC_New(PyTracebackObject, &PyTraceBack_Type);
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115 if (tb != NULL) {
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116 Py_XINCREF(next);
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117 tb->tb_next = next;
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118 Py_XINCREF(frame);
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119 tb->tb_frame = frame;
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120 tb->tb_lasti = frame->f_lasti;
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121 tb->tb_lineno = PyFrame_GetLineNumber(frame);
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122 PyObject_GC_Track(tb);
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123 }
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124 return tb;
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125 }
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126
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127 int
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128 PyTraceBack_Here(PyFrameObject *frame)
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129 {
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130 PyThreadState *tstate = PyThreadState_GET();
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131 PyTracebackObject *oldtb = (PyTracebackObject *) tstate->curexc_traceback;
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132 PyTracebackObject *tb = newtracebackobject(oldtb, frame);
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133 if (tb == NULL)
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134 return -1;
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135 tstate->curexc_traceback = (PyObject *)tb;
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136 Py_XDECREF(oldtb);
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137 return 0;
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138 }
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139
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140 static PyObject *
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141 _Py_FindSourceFile(PyObject *filename, char* namebuf, size_t namelen, PyObject *io)
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142 {
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143 Py_ssize_t i;
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144 PyObject *binary;
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145 PyObject *v;
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146 Py_ssize_t npath;
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147 size_t taillen;
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148 PyObject *syspath;
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149 PyObject *path;
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150 const char* tail;
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151 PyObject *filebytes;
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152 const char* filepath;
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153 Py_ssize_t len;
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154 PyObject* result;
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155 _Py_IDENTIFIER(open);
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156
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157 filebytes = PyUnicode_EncodeFSDefault(filename);
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158 if (filebytes == NULL) {
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159 PyErr_Clear();
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160 return NULL;
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161 }
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162 filepath = PyBytes_AS_STRING(filebytes);
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163
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164 /* Search tail of filename in sys.path before giving up */
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165 tail = strrchr(filepath, SEP);
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166 if (tail == NULL)
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167 tail = filepath;
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168 else
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169 tail++;
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170 taillen = strlen(tail);
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171
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172 syspath = PySys_GetObject("path");
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173 if (syspath == NULL || !PyList_Check(syspath))
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174 goto error;
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175 npath = PyList_Size(syspath);
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176
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177 for (i = 0; i < npath; i++) {
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178 v = PyList_GetItem(syspath, i);
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179 if (v == NULL) {
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180 PyErr_Clear();
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181 break;
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182 }
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183 if (!PyUnicode_Check(v))
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184 continue;
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185 path = PyUnicode_EncodeFSDefault(v);
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186 if (path == NULL) {
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187 PyErr_Clear();
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188 continue;
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189 }
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190 len = PyBytes_GET_SIZE(path);
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191 if (len + 1 + (Py_ssize_t)taillen >= (Py_ssize_t)namelen - 1) {
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192 Py_DECREF(path);
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193 continue; /* Too long */
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194 }
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195 strcpy(namebuf, PyBytes_AS_STRING(path));
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196 Py_DECREF(path);
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197 if (strlen(namebuf) != len)
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198 continue; /* v contains '\0' */
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199 if (len > 0 && namebuf[len-1] != SEP)
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200 namebuf[len++] = SEP;
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201 strcpy(namebuf+len, tail);
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202
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203 binary = _PyObject_CallMethodId(io, &PyId_open, "ss", namebuf, "rb");
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204 if (binary != NULL) {
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205 result = binary;
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206 goto finally;
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207 }
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208 PyErr_Clear();
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209 }
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210 goto error;
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211
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212 error:
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213 result = NULL;
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214 finally:
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215 Py_DECREF(filebytes);
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216 return result;
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217 }
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218
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219 int
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220 _Py_DisplaySourceLine(PyObject *f, PyObject *filename, int lineno, int indent)
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221 {
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222 int err = 0;
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223 int fd;
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224 int i;
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225 char *found_encoding;
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226 char *encoding;
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227 PyObject *io;
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228 PyObject *binary;
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229 PyObject *fob = NULL;
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230 PyObject *lineobj = NULL;
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231 PyObject *res;
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232 char buf[MAXPATHLEN+1];
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233 int kind;
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234 void *data;
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235 _Py_IDENTIFIER(close);
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236 _Py_IDENTIFIER(open);
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237 _Py_IDENTIFIER(TextIOWrapper);
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238
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239 /* open the file */
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240 if (filename == NULL)
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241 return 0;
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242
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243 io = PyImport_ImportModuleNoBlock("io");
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244 if (io == NULL)
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245 return -1;
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246 binary = _PyObject_CallMethodId(io, &PyId_open, "Os", filename, "rb");
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247
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248 if (binary == NULL) {
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249 binary = _Py_FindSourceFile(filename, buf, sizeof(buf), io);
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250 if (binary == NULL) {
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251 Py_DECREF(io);
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252 return 0;
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253 }
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254 }
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255
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256 /* use the right encoding to decode the file as unicode */
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257 fd = PyObject_AsFileDescriptor(binary);
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258 found_encoding = PyTokenizer_FindEncodingFilename(fd, filename);
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259 encoding = (found_encoding != NULL) ? found_encoding : "utf-8";
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260 lseek(fd, 0, 0); /* Reset position */
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261 fob = _PyObject_CallMethodId(io, &PyId_TextIOWrapper, "Os", binary, encoding);
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262 Py_DECREF(io);
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263 Py_DECREF(binary);
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264 PyMem_FREE(found_encoding);
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265
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266 if (fob == NULL) {
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267 PyErr_Clear();
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268 return 0;
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269 }
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270
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271 /* get the line number lineno */
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272 for (i = 0; i < lineno; i++) {
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273 Py_XDECREF(lineobj);
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274 lineobj = PyFile_GetLine(fob, -1);
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275 if (!lineobj) {
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276 err = -1;
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277 break;
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278 }
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279 }
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280 res = _PyObject_CallMethodId(fob, &PyId_close, "");
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281 if (res)
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282 Py_DECREF(res);
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283 else
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284 PyErr_Clear();
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285 Py_DECREF(fob);
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286 if (!lineobj || !PyUnicode_Check(lineobj)) {
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287 Py_XDECREF(lineobj);
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288 return err;
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289 }
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290
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291 /* remove the indentation of the line */
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292 kind = PyUnicode_KIND(lineobj);
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293 data = PyUnicode_DATA(lineobj);
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294 for (i=0; i < PyUnicode_GET_LENGTH(lineobj); i++) {
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295 Py_UCS4 ch = PyUnicode_READ(kind, data, i);
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296 if (ch != ' ' && ch != '\t' && ch != '\014')
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297 break;
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298 }
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299 if (i) {
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300 PyObject *truncated;
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301 truncated = PyUnicode_Substring(lineobj, i, PyUnicode_GET_LENGTH(lineobj));
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302 if (truncated) {
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303 Py_DECREF(lineobj);
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304 lineobj = truncated;
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305 } else {
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306 PyErr_Clear();
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307 }
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308 }
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309
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310 /* Write some spaces before the line */
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311 strcpy(buf, " ");
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312 assert (strlen(buf) == 10);
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313 while (indent > 0) {
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314 if(indent < 10)
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315 buf[indent] = '\0';
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316 err = PyFile_WriteString(buf, f);
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317 if (err != 0)
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318 break;
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319 indent -= 10;
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320 }
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321
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322 /* finally display the line */
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323 if (err == 0)
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324 err = PyFile_WriteObject(lineobj, f, Py_PRINT_RAW);
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325 Py_DECREF(lineobj);
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326 if (err == 0)
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327 err = PyFile_WriteString("\n", f);
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328 return err;
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329 }
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330
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331 static int
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332 tb_displayline(PyObject *f, PyObject *filename, int lineno, PyObject *name)
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333 {
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334 int err;
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335 PyObject *line;
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336
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337 if (filename == NULL || name == NULL)
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338 return -1;
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339 line = PyUnicode_FromFormat(" File \"%U\", line %d, in %U\n",
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340 filename, lineno, name);
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341 if (line == NULL)
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342 return -1;
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343 err = PyFile_WriteObject(line, f, Py_PRINT_RAW);
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344 Py_DECREF(line);
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345 if (err != 0)
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346 return err;
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347 /* ignore errors since we can't report them, can we? */
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348 if (_Py_DisplaySourceLine(f, filename, lineno, 4))
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349 PyErr_Clear();
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350 return err;
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351 }
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352
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353 static int
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354 tb_printinternal(PyTracebackObject *tb, PyObject *f, long limit)
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355 {
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356 int err = 0;
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357 long depth = 0;
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358 PyTracebackObject *tb1 = tb;
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359 while (tb1 != NULL) {
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360 depth++;
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361 tb1 = tb1->tb_next;
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362 }
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363 while (tb != NULL && err == 0) {
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364 if (depth <= limit) {
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365 err = tb_displayline(f,
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366 tb->tb_frame->f_code->co_filename,
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367 tb->tb_lineno,
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368 tb->tb_frame->f_code->co_name);
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369 }
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370 depth--;
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371 tb = tb->tb_next;
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372 if (err == 0)
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373 err = PyErr_CheckSignals();
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374 }
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375 return err;
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376 }
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377
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378 #define PyTraceBack_LIMIT 1000
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379
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380 int
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381 PyTraceBack_Print(PyObject *v, PyObject *f)
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382 {
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383 int err;
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384 PyObject *limitv;
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385 long limit = PyTraceBack_LIMIT;
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386
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387 if (v == NULL)
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388 return 0;
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389 if (!PyTraceBack_Check(v)) {
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390 PyErr_BadInternalCall();
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391 return -1;
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392 }
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393 limitv = PySys_GetObject("tracebacklimit");
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394 if (limitv) {
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395 PyObject *exc_type, *exc_value, *exc_tb;
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396
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397 PyErr_Fetch(&exc_type, &exc_value, &exc_tb);
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398 limit = PyLong_AsLong(limitv);
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399 if (limit == -1 && PyErr_Occurred()) {
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400 if (PyErr_ExceptionMatches(PyExc_OverflowError)) {
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401 limit = PyTraceBack_LIMIT;
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402 }
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403 else {
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404 Py_XDECREF(exc_type);
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405 Py_XDECREF(exc_value);
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406 Py_XDECREF(exc_tb);
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407 return 0;
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408 }
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409 }
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410 else if (limit <= 0) {
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411 limit = PyTraceBack_LIMIT;
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412 }
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413 PyErr_Restore(exc_type, exc_value, exc_tb);
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414 }
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415 err = PyFile_WriteString("Traceback (most recent call last):\n", f);
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416 if (!err)
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417 err = tb_printinternal((PyTracebackObject *)v, f, limit);
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418 return err;
86
a6934380c6e7 "Compiling" version
Guido van Rossum <guido@python.org>
parents:
diff changeset
419 }
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420
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421 /* Reverse a string. For example, "abcd" becomes "dcba".
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422
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423 This function is signal safe. */
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424
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425 static void
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426 reverse_string(char *text, const size_t len)
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427 {
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428 char tmp;
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429 size_t i, j;
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430 if (len == 0)
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431 return;
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diff changeset
432 for (i=0, j=len-1; i < j; i++, j--) {
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433 tmp = text[i];
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diff changeset
434 text[i] = text[j];
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435 text[j] = tmp;
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
436 }
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
437 }
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
438
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diff changeset
439 /* Format an integer in range [0; 999999] to decimal,
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
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440 and write it into the file fd.
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441
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442 This function is signal safe. */
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diff changeset
443
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diff changeset
444 static void
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diff changeset
445 dump_decimal(int fd, int value)
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
446 {
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diff changeset
447 char buffer[7];
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Victor Stinner <victor.stinner@haypocalc.com>
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448 int len;
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diff changeset
449 if (value < 0 || 999999 < value)
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450 return;
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451 len = 0;
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452 do {
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453 buffer[len] = '0' + (value % 10);
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454 value /= 10;
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455 len++;
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Victor Stinner <victor.stinner@haypocalc.com>
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456 } while (value);
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diff changeset
457 reverse_string(buffer, len);
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diff changeset
458 write(fd, buffer, len);
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459 }
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460
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461 /* Format an integer in range [0; 0xffffffff] to hexdecimal of 'width' digits,
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diff changeset
462 and write it into the file fd.
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463
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Victor Stinner <victor.stinner@haypocalc.com>
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464 This function is signal safe. */
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465
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diff changeset
466 static void
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
467 dump_hexadecimal(int width, unsigned long value, int fd)
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
468 {
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diff changeset
469 int len;
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diff changeset
470 char buffer[sizeof(unsigned long) * 2 + 1];
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471 len = 0;
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diff changeset
472 do {
72918
d76338eacf7c Issue #13088: Add shared Py_hexdigits constant to format a number into base 16
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72835
diff changeset
473 buffer[len] = Py_hexdigits[value & 15];
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474 value >>= 4;
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475 len++;
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476 } while (len < width || value);
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477 reverse_string(buffer, len);
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diff changeset
478 write(fd, buffer, len);
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479 }
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diff changeset
480
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diff changeset
481 /* Write an unicode object into the file fd using ascii+backslashreplace.
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diff changeset
482
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diff changeset
483 This function is signal safe. */
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diff changeset
484
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diff changeset
485 static void
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diff changeset
486 dump_ascii(int fd, PyObject *text)
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Victor Stinner <victor.stinner@haypocalc.com>
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diff changeset
487 {
72475
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
488 PyASCIIObject *ascii = (PyASCIIObject *)text;
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489 Py_ssize_t i, size;
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490 int truncated;
72475
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diff changeset
491 int kind;
72710
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492 void *data = NULL;
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diff changeset
493 wchar_t *wstr = NULL;
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diff changeset
494 Py_UCS4 ch;
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diff changeset
495
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diff changeset
496 size = ascii->length;
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
497 kind = ascii->state.kind;
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
498 if (ascii->state.compact) {
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Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
499 if (ascii->state.ascii)
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Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
500 data = ((PyASCIIObject*)text) + 1;
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Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
501 else
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parents: 69148
diff changeset
502 data = ((PyCompactUnicodeObject*)text) + 1;
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parents: 69148
diff changeset
503 }
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diff changeset
504 else if (kind != PyUnicode_WCHAR_KIND) {
72475
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Martin v. Löwis <martin@v.loewis.de>
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diff changeset
505 data = ((PyUnicodeObject *)text)->data.any;
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Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
506 if (data == NULL)
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
507 return;
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
508 }
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
509 else {
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
510 wstr = ((PyASCIIObject *)text)->wstr;
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Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
511 if (wstr == NULL)
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
512 return;
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
513 size = ((PyCompactUnicodeObject *)text)->wstr_length;
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
514 }
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
515
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
516 if (MAX_STRING_LENGTH < size) {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
517 size = MAX_STRING_LENGTH;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
518 truncated = 1;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
519 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
520 else
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
521 truncated = 0;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
522
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
523 for (i=0; i < size; i++) {
72710
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
524 if (kind != PyUnicode_WCHAR_KIND)
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
525 ch = PyUnicode_READ(kind, data, i);
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
526 else
2a8ccff8f337 traceback: fix dump_ascii() for string with kind=PyUnicode_WCHAR_KIND
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72475
diff changeset
527 ch = wstr[i];
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
528 if (ch < 128) {
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
529 char c = (char)ch;
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
530 write(fd, &c, 1);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
531 }
73686
59dcb6249034 Remove "#ifdef Py_UNICODE_WIDE": Python is now always wide
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72925
diff changeset
532 else if (ch < 0xff) {
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
533 PUTS(fd, "\\x");
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
534 dump_hexadecimal(2, ch, fd);
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
535 }
73686
59dcb6249034 Remove "#ifdef Py_UNICODE_WIDE": Python is now always wide
Victor Stinner <victor.stinner@haypocalc.com>
parents: 72925
diff changeset
536 else if (ch < 0xffff) {
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
537 PUTS(fd, "\\u");
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
538 dump_hexadecimal(4, ch, fd);
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
539 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
540 else {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
541 PUTS(fd, "\\U");
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
542 dump_hexadecimal(8, ch, fd);
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
543 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
544 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
545 if (truncated)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
546 PUTS(fd, "...");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
547 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
548
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
549 /* Write a frame into the file fd: "File "xxx", line xxx in xxx".
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
550
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
551 This function is signal safe. */
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
552
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
553 static void
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
554 dump_frame(int fd, PyFrameObject *frame)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
555 {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
556 PyCodeObject *code;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
557 int lineno;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
558
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
559 code = frame->f_code;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
560 PUTS(fd, " File ");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
561 if (code != NULL && code->co_filename != NULL
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
562 && PyUnicode_Check(code->co_filename))
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
563 {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
564 write(fd, "\"", 1);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
565 dump_ascii(fd, code->co_filename);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
566 write(fd, "\"", 1);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
567 } else {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
568 PUTS(fd, "???");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
569 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
570
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
571 /* PyFrame_GetLineNumber() was introduced in Python 2.7.0 and 3.2.0 */
72475
8beaa9a37387 Implement PEP 393.
Martin v. Löwis <martin@v.loewis.de>
parents: 69148
diff changeset
572 lineno = PyCode_Addr2Line(code, frame->f_lasti);
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
573 PUTS(fd, ", line ");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
574 dump_decimal(fd, lineno);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
575 PUTS(fd, " in ");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
576
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
577 if (code != NULL && code->co_name != NULL
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
578 && PyUnicode_Check(code->co_name))
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
579 dump_ascii(fd, code->co_name);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
580 else
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
581 PUTS(fd, "???");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
582
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
583 write(fd, "\n", 1);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
584 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
585
69102
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
586 static void
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
587 dump_traceback(int fd, PyThreadState *tstate, int write_header)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
588 {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
589 PyFrameObject *frame;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
590 unsigned int depth;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
591
69102
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
592 if (write_header)
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
593 PUTS(fd, "Traceback (most recent call first):\n");
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
594
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
595 frame = _PyThreadState_GetFrame(tstate);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
596 if (frame == NULL)
69102
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
597 return;
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
598
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
599 depth = 0;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
600 while (frame != NULL) {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
601 if (MAX_FRAME_DEPTH <= depth) {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
602 PUTS(fd, " ...\n");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
603 break;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
604 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
605 if (!PyFrame_Check(frame))
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
606 break;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
607 dump_frame(fd, frame);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
608 frame = frame->f_back;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
609 depth++;
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
610 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
611 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
612
69102
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
613 void
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
614 _Py_DumpTraceback(int fd, PyThreadState *tstate)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
615 {
69102
7e3ed426962f Issue #11393: _Py_DumpTraceback() writes the header even if there is no frame
Victor Stinner <victor.stinner@haypocalc.com>
parents: 69070
diff changeset
616 dump_traceback(fd, tstate, 1);
69070
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
617 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
618
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
619 /* Write the thread identifier into the file 'fd': "Current thread 0xHHHH:\" if
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
620 is_current is true, "Thread 0xHHHH:\n" otherwise.
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
621
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
622 This function is signal safe. */
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
623
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
624 static void
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
625 write_thread_id(int fd, PyThreadState *tstate, int is_current)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
626 {
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
627 if (is_current)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
628 PUTS(fd, "Current thread 0x");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
629 else
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
630 PUTS(fd, "Thread 0x");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
631 dump_hexadecimal(sizeof(long)*2, (unsigned long)tstate->thread_id, fd);
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
632 PUTS(fd, ":\n");
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
633 }
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
634
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
635 const char*
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
636 _Py_DumpTracebackThreads(int fd, PyInterpreterState *interp,
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
637 PyThreadState *current_thread)
b0680b5a5215 Issue #11393: Add the new faulthandler module
Victor Stinner <victor.stinner@haypocalc.com>
parents: 68257
diff changeset
638 {
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639 PyThreadState *tstate;
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640 unsigned int nthreads;
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641
b0680b5a5215 Issue #11393: Add the new faulthandler module
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parents: 68257
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642 /* Get the current interpreter from the current thread */
b0680b5a5215 Issue #11393: Add the new faulthandler module
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643 tstate = PyInterpreterState_ThreadHead(interp);
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644 if (tstate == NULL)
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645 return "unable to get the thread head state";
b0680b5a5215 Issue #11393: Add the new faulthandler module
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parents: 68257
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646
b0680b5a5215 Issue #11393: Add the new faulthandler module
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647 /* Dump the traceback of each thread */
b0680b5a5215 Issue #11393: Add the new faulthandler module
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648 tstate = PyInterpreterState_ThreadHead(interp);
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649 nthreads = 0;
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650 do
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parents: 68257
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651 {
b0680b5a5215 Issue #11393: Add the new faulthandler module
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parents: 68257
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652 if (nthreads != 0)
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653 write(fd, "\n", 1);
b0680b5a5215 Issue #11393: Add the new faulthandler module
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654 if (nthreads >= MAX_NTHREADS) {
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655 PUTS(fd, "...\n");
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656 break;
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657 }
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658 write_thread_id(fd, tstate, tstate == current_thread);
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659 dump_traceback(fd, tstate, 0);
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660 tstate = PyThreadState_Next(tstate);
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661 nthreads++;
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662 } while (tstate != NULL);
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663
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664 return NULL;
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665 }
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666