Mercurial > cpython-lru_cache-weakref
annotate Python/traceback.c @ 13266:4c4e95147258 legacy-trunk
Jack Jansen, Mac patch:
Include stat.h if needed; different Mac filename compare
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Sat, 01 Jul 2000 01:06:56 +0000 |
| parents | 87ee82e5c56d |
| children | f79434ee41fa |
| rev | line source |
|---|---|
| 145 | 1 /*********************************************************** |
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2 Copyright (c) 2000, BeOpen.com. |
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3 Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
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4 Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
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5 All rights reserved. |
| 145 | 6 |
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7 See the file "Misc/COPYRIGHT" for information on usage and |
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8 redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 145 | 9 ******************************************************************/ |
| 10 | |
| 86 | 11 /* Traceback implementation */ |
| 12 | |
| 5372 | 13 #include "Python.h" |
| 86 | 14 |
| 15 #include "compile.h" | |
| 16 #include "frameobject.h" | |
| 17 #include "structmember.h" | |
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18 #include "osdefs.h" |
| 86 | 19 |
| 20 typedef struct _tracebackobject { | |
| 5372 | 21 PyObject_HEAD |
| 86 | 22 struct _tracebackobject *tb_next; |
| 5372 | 23 PyFrameObject *tb_frame; |
| 86 | 24 int tb_lasti; |
| 25 int tb_lineno; | |
| 26 } tracebackobject; | |
| 27 | |
| 28 #define OFF(x) offsetof(tracebackobject, x) | |
| 29 | |
| 30 static struct memberlist tb_memberlist[] = { | |
| 31 {"tb_next", T_OBJECT, OFF(tb_next)}, | |
| 32 {"tb_frame", T_OBJECT, OFF(tb_frame)}, | |
| 33 {"tb_lasti", T_INT, OFF(tb_lasti)}, | |
| 34 {"tb_lineno", T_INT, OFF(tb_lineno)}, | |
| 35 {NULL} /* Sentinel */ | |
| 36 }; | |
| 37 | |
| 5372 | 38 static PyObject * |
| 86 | 39 tb_getattr(tb, name) |
| 40 tracebackobject *tb; | |
| 41 char *name; | |
| 42 { | |
| 5372 | 43 return PyMember_Get((char *)tb, tb_memberlist, name); |
| 86 | 44 } |
| 45 | |
| 46 static void | |
| 47 tb_dealloc(tb) | |
| 48 tracebackobject *tb; | |
| 49 { | |
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50 Py_TRASHCAN_SAFE_BEGIN(tb) |
| 5372 | 51 Py_XDECREF(tb->tb_next); |
| 52 Py_XDECREF(tb->tb_frame); | |
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53 PyObject_DEL(tb); |
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54 Py_TRASHCAN_SAFE_END(tb) |
| 86 | 55 } |
| 56 | |
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57 #define Tracebacktype PyTraceBack_Type |
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58 #define is_tracebackobject PyTraceBack_Check |
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59 |
| 5372 | 60 PyTypeObject Tracebacktype = { |
| 61 PyObject_HEAD_INIT(&PyType_Type) | |
| 86 | 62 0, |
| 63 "traceback", | |
| 64 sizeof(tracebackobject), | |
| 65 0, | |
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66 (destructor)tb_dealloc, /*tp_dealloc*/ |
| 86 | 67 0, /*tp_print*/ |
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68 (getattrfunc)tb_getattr, /*tp_getattr*/ |
| 86 | 69 0, /*tp_setattr*/ |
| 70 0, /*tp_compare*/ | |
| 71 0, /*tp_repr*/ | |
| 72 0, /*tp_as_number*/ | |
| 73 0, /*tp_as_sequence*/ | |
| 74 0, /*tp_as_mapping*/ | |
| 75 }; | |
| 76 | |
| 77 static tracebackobject * | |
| 78 newtracebackobject(next, frame, lasti, lineno) | |
| 79 tracebackobject *next; | |
| 5372 | 80 PyFrameObject *frame; |
| 86 | 81 int lasti, lineno; |
| 82 { | |
| 83 tracebackobject *tb; | |
| 84 if ((next != NULL && !is_tracebackobject(next)) || | |
| 5372 | 85 frame == NULL || !PyFrame_Check(frame)) { |
| 86 PyErr_BadInternalCall(); | |
| 86 | 87 return NULL; |
| 88 } | |
| 5372 | 89 tb = PyObject_NEW(tracebackobject, &Tracebacktype); |
| 86 | 90 if (tb != NULL) { |
| 5372 | 91 Py_XINCREF(next); |
| 86 | 92 tb->tb_next = next; |
| 5372 | 93 Py_XINCREF(frame); |
| 86 | 94 tb->tb_frame = frame; |
| 95 tb->tb_lasti = lasti; | |
| 96 tb->tb_lineno = lineno; | |
| 97 } | |
| 98 return tb; | |
| 99 } | |
| 100 | |
| 101 int | |
| 5372 | 102 PyTraceBack_Here(frame) |
| 103 PyFrameObject *frame; | |
| 86 | 104 { |
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105 PyThreadState *tstate = frame->f_tstate; |
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106 tracebackobject *oldtb = (tracebackobject *) tstate->curexc_traceback; |
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107 tracebackobject *tb = newtracebackobject(oldtb, |
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108 frame, frame->f_lasti, frame->f_lineno); |
| 86 | 109 if (tb == NULL) |
| 110 return -1; | |
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111 tstate->curexc_traceback = (PyObject *)tb; |
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112 Py_XDECREF(oldtb); |
| 86 | 113 return 0; |
| 114 } | |
| 115 | |
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116 static int |
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117 tb_displayline(f, filename, lineno, name) |
| 5372 | 118 PyObject *f; |
| 86 | 119 char *filename; |
| 120 int lineno; | |
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121 char *name; |
| 86 | 122 { |
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123 int err = 0; |
| 86 | 124 FILE *xfp; |
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125 char linebuf[1000]; |
| 86 | 126 int i; |
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127 if (filename == NULL || name == NULL) |
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128 return -1; |
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129 #ifdef MPW |
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130 /* This is needed by MPW's File and Line commands */ |
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131 #define FMT " File \"%.900s\"; line %d # in %s\n" |
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132 #else |
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133 /* This is needed by Emacs' compile command */ |
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134 #define FMT " File \"%.900s\", line %d, in %s\n" |
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135 #endif |
| 86 | 136 xfp = fopen(filename, "r"); |
| 137 if (xfp == NULL) { | |
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138 /* Search tail of filename in sys.path before giving up */ |
| 5372 | 139 PyObject *path; |
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140 char *tail = strrchr(filename, SEP); |
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141 if (tail == NULL) |
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142 tail = filename; |
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143 else |
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144 tail++; |
| 5372 | 145 path = PySys_GetObject("path"); |
| 146 if (path != NULL && PyList_Check(path)) { | |
| 147 int npath = PyList_Size(path); | |
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148 size_t taillen = strlen(tail); |
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149 char namebuf[MAXPATHLEN+1]; |
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150 for (i = 0; i < npath; i++) { |
| 5372 | 151 PyObject *v = PyList_GetItem(path, i); |
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152 if (v == NULL) { |
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153 PyErr_Clear(); |
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154 break; |
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155 } |
| 5372 | 156 if (PyString_Check(v)) { |
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157 size_t len; |
| 5372 | 158 len = PyString_Size(v); |
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159 if (len + 1 + taillen >= MAXPATHLEN) |
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160 continue; /* Too long */ |
| 5372 | 161 strcpy(namebuf, PyString_AsString(v)); |
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162 if (strlen(namebuf) != len) |
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163 continue; /* v contains '\0' */ |
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164 if (len > 0 && namebuf[len-1] != SEP) |
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165 namebuf[len++] = SEP; |
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166 strcpy(namebuf+len, tail); |
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167 xfp = fopen(namebuf, "r"); |
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168 if (xfp != NULL) { |
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169 filename = namebuf; |
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170 break; |
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171 } |
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172 } |
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173 } |
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174 } |
| 86 | 175 } |
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176 sprintf(linebuf, FMT, filename, lineno, name); |
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177 err = PyFile_WriteString(linebuf, f); |
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178 if (xfp == NULL || err != 0) |
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179 return err; |
| 86 | 180 for (i = 0; i < lineno; i++) { |
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181 char* pLastChar = &linebuf[sizeof(linebuf)-2]; |
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182 do { |
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183 *pLastChar = '\0'; |
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184 if (fgets(linebuf, sizeof linebuf, xfp) == NULL) |
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185 break; |
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186 /* fgets read *something*; if it didn't get as |
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187 far as pLastChar, it must have found a newline |
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188 or hit the end of the file; if pLastChar is \n, |
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189 it obviously found a newline; else we haven't |
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190 yet seen a newline, so must continue */ |
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191 } while (*pLastChar != '\0' && *pLastChar != '\n'); |
| 86 | 192 } |
| 193 if (i == lineno) { | |
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194 char *p = linebuf; |
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195 while (*p == ' ' || *p == '\t' || *p == '\014') |
| 86 | 196 p++; |
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197 err = PyFile_WriteString(" ", f); |
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198 if (err == 0) { |
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199 err = PyFile_WriteString(p, f); |
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200 if (err == 0 && strchr(p, '\n') == NULL) |
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201 err = PyFile_WriteString("\n", f); |
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202 } |
| 86 | 203 } |
| 204 fclose(xfp); | |
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205 return err; |
| 86 | 206 } |
| 207 | |
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208 static int |
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209 tb_printinternal(tb, f, limit) |
| 86 | 210 tracebackobject *tb; |
| 5372 | 211 PyObject *f; |
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212 int limit; |
| 86 | 213 { |
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214 int err = 0; |
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215 int depth = 0; |
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216 tracebackobject *tb1 = tb; |
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217 while (tb1 != NULL) { |
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218 depth++; |
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219 tb1 = tb1->tb_next; |
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220 } |
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221 while (tb != NULL && err == 0) { |
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222 if (depth <= limit) { |
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223 if (Py_OptimizeFlag) |
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224 tb->tb_lineno = PyCode_Addr2Line( |
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225 tb->tb_frame->f_code, tb->tb_lasti); |
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226 err = tb_displayline(f, |
| 5372 | 227 PyString_AsString( |
| 228 tb->tb_frame->f_code->co_filename), | |
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229 tb->tb_lineno, |
| 5372 | 230 PyString_AsString(tb->tb_frame->f_code->co_name)); |
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231 } |
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232 depth--; |
| 86 | 233 tb = tb->tb_next; |
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234 if (err == 0) |
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235 err = PyErr_CheckSignals(); |
| 86 | 236 } |
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237 return err; |
| 86 | 238 } |
| 239 | |
| 240 int | |
| 5372 | 241 PyTraceBack_Print(v, f) |
| 242 PyObject *v; | |
| 243 PyObject *f; | |
| 86 | 244 { |
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245 int err; |
| 5372 | 246 PyObject *limitv; |
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247 int limit = 1000; |
| 86 | 248 if (v == NULL) |
| 249 return 0; | |
| 250 if (!is_tracebackobject(v)) { | |
| 5372 | 251 PyErr_BadInternalCall(); |
| 86 | 252 return -1; |
| 253 } | |
| 5372 | 254 limitv = PySys_GetObject("tracebacklimit"); |
| 255 if (limitv && PyInt_Check(limitv)) { | |
| 256 limit = PyInt_AsLong(limitv); | |
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257 if (limit <= 0) |
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258 return 0; |
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259 } |
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260 err = PyFile_WriteString("Traceback (most recent call last):\n", f); |
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261 if (!err) |
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262 err = tb_printinternal((tracebackobject *)v, f, limit); |
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263 return err; |
| 86 | 264 } |