Mercurial > cpython-lru_cache-weakref
annotate Python/traceback.c @ 13255:916fb024ce94 legacy-trunk
Change copyright notice.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Fri, 30 Jun 2000 23:50:40 +0000 |
| parents | 8c8de5b736dc |
| children | 87ee82e5c56d |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
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3 The Netherlands. |
| 145 | 4 |
| 5 All Rights Reserved | |
| 6 | |
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7 Copyright (c) 2000, BeOpen.com. |
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8 Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
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9 Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
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10 All rights reserved. |
| 145 | 11 |
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12 See the file "Misc/COPYRIGHT" for information on usage and |
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13 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 145 | 14 |
| 15 ******************************************************************/ | |
| 16 | |
| 86 | 17 /* Traceback implementation */ |
| 18 | |
| 5372 | 19 #include "Python.h" |
| 86 | 20 |
| 21 #include "compile.h" | |
| 22 #include "frameobject.h" | |
| 23 #include "structmember.h" | |
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24 #include "osdefs.h" |
| 86 | 25 |
| 26 typedef struct _tracebackobject { | |
| 5372 | 27 PyObject_HEAD |
| 86 | 28 struct _tracebackobject *tb_next; |
| 5372 | 29 PyFrameObject *tb_frame; |
| 86 | 30 int tb_lasti; |
| 31 int tb_lineno; | |
| 32 } tracebackobject; | |
| 33 | |
| 34 #define OFF(x) offsetof(tracebackobject, x) | |
| 35 | |
| 36 static struct memberlist tb_memberlist[] = { | |
| 37 {"tb_next", T_OBJECT, OFF(tb_next)}, | |
| 38 {"tb_frame", T_OBJECT, OFF(tb_frame)}, | |
| 39 {"tb_lasti", T_INT, OFF(tb_lasti)}, | |
| 40 {"tb_lineno", T_INT, OFF(tb_lineno)}, | |
| 41 {NULL} /* Sentinel */ | |
| 42 }; | |
| 43 | |
| 5372 | 44 static PyObject * |
| 86 | 45 tb_getattr(tb, name) |
| 46 tracebackobject *tb; | |
| 47 char *name; | |
| 48 { | |
| 5372 | 49 return PyMember_Get((char *)tb, tb_memberlist, name); |
| 86 | 50 } |
| 51 | |
| 52 static void | |
| 53 tb_dealloc(tb) | |
| 54 tracebackobject *tb; | |
| 55 { | |
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56 Py_TRASHCAN_SAFE_BEGIN(tb) |
| 5372 | 57 Py_XDECREF(tb->tb_next); |
| 58 Py_XDECREF(tb->tb_frame); | |
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59 PyObject_DEL(tb); |
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60 Py_TRASHCAN_SAFE_END(tb) |
| 86 | 61 } |
| 62 | |
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63 #define Tracebacktype PyTraceBack_Type |
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64 #define is_tracebackobject PyTraceBack_Check |
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65 |
| 5372 | 66 PyTypeObject Tracebacktype = { |
| 67 PyObject_HEAD_INIT(&PyType_Type) | |
| 86 | 68 0, |
| 69 "traceback", | |
| 70 sizeof(tracebackobject), | |
| 71 0, | |
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72 (destructor)tb_dealloc, /*tp_dealloc*/ |
| 86 | 73 0, /*tp_print*/ |
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74 (getattrfunc)tb_getattr, /*tp_getattr*/ |
| 86 | 75 0, /*tp_setattr*/ |
| 76 0, /*tp_compare*/ | |
| 77 0, /*tp_repr*/ | |
| 78 0, /*tp_as_number*/ | |
| 79 0, /*tp_as_sequence*/ | |
| 80 0, /*tp_as_mapping*/ | |
| 81 }; | |
| 82 | |
| 83 static tracebackobject * | |
| 84 newtracebackobject(next, frame, lasti, lineno) | |
| 85 tracebackobject *next; | |
| 5372 | 86 PyFrameObject *frame; |
| 86 | 87 int lasti, lineno; |
| 88 { | |
| 89 tracebackobject *tb; | |
| 90 if ((next != NULL && !is_tracebackobject(next)) || | |
| 5372 | 91 frame == NULL || !PyFrame_Check(frame)) { |
| 92 PyErr_BadInternalCall(); | |
| 86 | 93 return NULL; |
| 94 } | |
| 5372 | 95 tb = PyObject_NEW(tracebackobject, &Tracebacktype); |
| 86 | 96 if (tb != NULL) { |
| 5372 | 97 Py_XINCREF(next); |
| 86 | 98 tb->tb_next = next; |
| 5372 | 99 Py_XINCREF(frame); |
| 86 | 100 tb->tb_frame = frame; |
| 101 tb->tb_lasti = lasti; | |
| 102 tb->tb_lineno = lineno; | |
| 103 } | |
| 104 return tb; | |
| 105 } | |
| 106 | |
| 107 int | |
| 5372 | 108 PyTraceBack_Here(frame) |
| 109 PyFrameObject *frame; | |
| 86 | 110 { |
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111 PyThreadState *tstate = frame->f_tstate; |
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112 tracebackobject *oldtb = (tracebackobject *) tstate->curexc_traceback; |
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113 tracebackobject *tb = newtracebackobject(oldtb, |
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114 frame, frame->f_lasti, frame->f_lineno); |
| 86 | 115 if (tb == NULL) |
| 116 return -1; | |
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117 tstate->curexc_traceback = (PyObject *)tb; |
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118 Py_XDECREF(oldtb); |
| 86 | 119 return 0; |
| 120 } | |
| 121 | |
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122 static int |
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123 tb_displayline(f, filename, lineno, name) |
| 5372 | 124 PyObject *f; |
| 86 | 125 char *filename; |
| 126 int lineno; | |
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127 char *name; |
| 86 | 128 { |
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129 int err = 0; |
| 86 | 130 FILE *xfp; |
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131 char linebuf[1000]; |
| 86 | 132 int i; |
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133 if (filename == NULL || name == NULL) |
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134 return -1; |
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135 #ifdef MPW |
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136 /* This is needed by MPW's File and Line commands */ |
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137 #define FMT " File \"%.900s\"; line %d # in %s\n" |
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138 #else |
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139 /* This is needed by Emacs' compile command */ |
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140 #define FMT " File \"%.900s\", line %d, in %s\n" |
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141 #endif |
| 86 | 142 xfp = fopen(filename, "r"); |
| 143 if (xfp == NULL) { | |
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144 /* Search tail of filename in sys.path before giving up */ |
| 5372 | 145 PyObject *path; |
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146 char *tail = strrchr(filename, SEP); |
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147 if (tail == NULL) |
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148 tail = filename; |
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149 else |
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150 tail++; |
| 5372 | 151 path = PySys_GetObject("path"); |
| 152 if (path != NULL && PyList_Check(path)) { | |
| 153 int npath = PyList_Size(path); | |
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154 size_t taillen = strlen(tail); |
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155 char namebuf[MAXPATHLEN+1]; |
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156 for (i = 0; i < npath; i++) { |
| 5372 | 157 PyObject *v = PyList_GetItem(path, i); |
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158 if (v == NULL) { |
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159 PyErr_Clear(); |
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160 break; |
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161 } |
| 5372 | 162 if (PyString_Check(v)) { |
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163 size_t len; |
| 5372 | 164 len = PyString_Size(v); |
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165 if (len + 1 + taillen >= MAXPATHLEN) |
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166 continue; /* Too long */ |
| 5372 | 167 strcpy(namebuf, PyString_AsString(v)); |
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168 if (strlen(namebuf) != len) |
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169 continue; /* v contains '\0' */ |
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170 if (len > 0 && namebuf[len-1] != SEP) |
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171 namebuf[len++] = SEP; |
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172 strcpy(namebuf+len, tail); |
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173 xfp = fopen(namebuf, "r"); |
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174 if (xfp != NULL) { |
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175 filename = namebuf; |
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176 break; |
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177 } |
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178 } |
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179 } |
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180 } |
| 86 | 181 } |
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182 sprintf(linebuf, FMT, filename, lineno, name); |
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183 err = PyFile_WriteString(linebuf, f); |
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184 if (xfp == NULL || err != 0) |
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185 return err; |
| 86 | 186 for (i = 0; i < lineno; i++) { |
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187 char* pLastChar = &linebuf[sizeof(linebuf)-2]; |
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188 do { |
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189 *pLastChar = '\0'; |
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190 if (fgets(linebuf, sizeof linebuf, xfp) == NULL) |
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191 break; |
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192 /* fgets read *something*; if it didn't get as |
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193 far as pLastChar, it must have found a newline |
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194 or hit the end of the file; if pLastChar is \n, |
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195 it obviously found a newline; else we haven't |
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196 yet seen a newline, so must continue */ |
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197 } while (*pLastChar != '\0' && *pLastChar != '\n'); |
| 86 | 198 } |
| 199 if (i == lineno) { | |
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200 char *p = linebuf; |
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201 while (*p == ' ' || *p == '\t' || *p == '\014') |
| 86 | 202 p++; |
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203 err = PyFile_WriteString(" ", f); |
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204 if (err == 0) { |
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205 err = PyFile_WriteString(p, f); |
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206 if (err == 0 && strchr(p, '\n') == NULL) |
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207 err = PyFile_WriteString("\n", f); |
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208 } |
| 86 | 209 } |
| 210 fclose(xfp); | |
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211 return err; |
| 86 | 212 } |
| 213 | |
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214 static int |
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215 tb_printinternal(tb, f, limit) |
| 86 | 216 tracebackobject *tb; |
| 5372 | 217 PyObject *f; |
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218 int limit; |
| 86 | 219 { |
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220 int err = 0; |
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221 int depth = 0; |
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222 tracebackobject *tb1 = tb; |
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223 while (tb1 != NULL) { |
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224 depth++; |
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225 tb1 = tb1->tb_next; |
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226 } |
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227 while (tb != NULL && err == 0) { |
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228 if (depth <= limit) { |
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229 if (Py_OptimizeFlag) |
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230 tb->tb_lineno = PyCode_Addr2Line( |
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231 tb->tb_frame->f_code, tb->tb_lasti); |
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232 err = tb_displayline(f, |
| 5372 | 233 PyString_AsString( |
| 234 tb->tb_frame->f_code->co_filename), | |
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235 tb->tb_lineno, |
| 5372 | 236 PyString_AsString(tb->tb_frame->f_code->co_name)); |
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237 } |
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238 depth--; |
| 86 | 239 tb = tb->tb_next; |
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240 if (err == 0) |
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241 err = PyErr_CheckSignals(); |
| 86 | 242 } |
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243 return err; |
| 86 | 244 } |
| 245 | |
| 246 int | |
| 5372 | 247 PyTraceBack_Print(v, f) |
| 248 PyObject *v; | |
| 249 PyObject *f; | |
| 86 | 250 { |
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251 int err; |
| 5372 | 252 PyObject *limitv; |
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253 int limit = 1000; |
| 86 | 254 if (v == NULL) |
| 255 return 0; | |
| 256 if (!is_tracebackobject(v)) { | |
| 5372 | 257 PyErr_BadInternalCall(); |
| 86 | 258 return -1; |
| 259 } | |
| 5372 | 260 limitv = PySys_GetObject("tracebacklimit"); |
| 261 if (limitv && PyInt_Check(limitv)) { | |
| 262 limit = PyInt_AsLong(limitv); | |
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263 if (limit <= 0) |
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264 return 0; |
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265 } |
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266 err = PyFile_WriteString("Traceback (most recent call last):\n", f); |
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267 if (!err) |
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268 err = tb_printinternal((tracebackobject *)v, f, limit); |
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269 return err; |
| 86 | 270 } |