Mercurial > cpython-lru_cache-weakref
annotate Python/traceback.c @ 4503:65d2d8e67da3 legacy-trunk
New permission notice, includes CNRI.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Fri, 25 Oct 1996 14:44:06 +0000 |
| parents | d249111d4ccc |
| children | 658815230546 |
| 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 Permission to use, copy, modify, and distribute this software and its |
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8 documentation for any purpose and without fee is hereby granted, |
| 145 | 9 provided that the above copyright notice appear in all copies and that |
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10 both that copyright notice and this permission notice appear in |
| 145 | 11 supporting documentation, and that the names of Stichting Mathematisch |
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12 Centrum or CWI or Corporation for National Research Initiatives or |
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13 CNRI not be used in advertising or publicity pertaining to |
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14 distribution of the software without specific, written prior |
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15 permission. |
| 145 | 16 |
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17 While CWI is the initial source for this software, a modified version |
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18 is made available by the Corporation for National Research Initiatives |
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19 (CNRI) at the Internet address ftp://ftp.python.org. |
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20 |
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21 STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
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22 REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
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23 MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
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24 CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
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25 DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
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26 PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
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27 TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
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28 PERFORMANCE OF THIS SOFTWARE. |
| 145 | 29 |
| 30 ******************************************************************/ | |
| 31 | |
| 86 | 32 /* Traceback implementation */ |
| 33 | |
| 34 #include "allobjects.h" | |
| 35 | |
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36 #include "sysmodule.h" |
| 86 | 37 #include "compile.h" |
| 38 #include "frameobject.h" | |
| 39 #include "traceback.h" | |
| 40 #include "structmember.h" | |
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41 #include "osdefs.h" |
| 86 | 42 |
| 43 typedef struct _tracebackobject { | |
| 44 OB_HEAD | |
| 45 struct _tracebackobject *tb_next; | |
| 46 frameobject *tb_frame; | |
| 47 int tb_lasti; | |
| 48 int tb_lineno; | |
| 49 } tracebackobject; | |
| 50 | |
| 51 #define OFF(x) offsetof(tracebackobject, x) | |
| 52 | |
| 53 static struct memberlist tb_memberlist[] = { | |
| 54 {"tb_next", T_OBJECT, OFF(tb_next)}, | |
| 55 {"tb_frame", T_OBJECT, OFF(tb_frame)}, | |
| 56 {"tb_lasti", T_INT, OFF(tb_lasti)}, | |
| 57 {"tb_lineno", T_INT, OFF(tb_lineno)}, | |
| 58 {NULL} /* Sentinel */ | |
| 59 }; | |
| 60 | |
| 61 static object * | |
| 62 tb_getattr(tb, name) | |
| 63 tracebackobject *tb; | |
| 64 char *name; | |
| 65 { | |
| 66 return getmember((char *)tb, tb_memberlist, name); | |
| 67 } | |
| 68 | |
| 69 static void | |
| 70 tb_dealloc(tb) | |
| 71 tracebackobject *tb; | |
| 72 { | |
| 73 XDECREF(tb->tb_next); | |
| 74 XDECREF(tb->tb_frame); | |
| 75 DEL(tb); | |
| 76 } | |
| 77 | |
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78 #define Tracebacktype PyTraceBack_Type |
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79 #define is_tracebackobject PyTraceBack_Check |
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80 |
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81 typeobject Tracebacktype = { |
| 86 | 82 OB_HEAD_INIT(&Typetype) |
| 83 0, | |
| 84 "traceback", | |
| 85 sizeof(tracebackobject), | |
| 86 0, | |
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87 (destructor)tb_dealloc, /*tp_dealloc*/ |
| 86 | 88 0, /*tp_print*/ |
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89 (getattrfunc)tb_getattr, /*tp_getattr*/ |
| 86 | 90 0, /*tp_setattr*/ |
| 91 0, /*tp_compare*/ | |
| 92 0, /*tp_repr*/ | |
| 93 0, /*tp_as_number*/ | |
| 94 0, /*tp_as_sequence*/ | |
| 95 0, /*tp_as_mapping*/ | |
| 96 }; | |
| 97 | |
| 98 static tracebackobject * | |
| 99 newtracebackobject(next, frame, lasti, lineno) | |
| 100 tracebackobject *next; | |
| 101 frameobject *frame; | |
| 102 int lasti, lineno; | |
| 103 { | |
| 104 tracebackobject *tb; | |
| 105 if ((next != NULL && !is_tracebackobject(next)) || | |
| 106 frame == NULL || !is_frameobject(frame)) { | |
| 107 err_badcall(); | |
| 108 return NULL; | |
| 109 } | |
| 110 tb = NEWOBJ(tracebackobject, &Tracebacktype); | |
| 111 if (tb != NULL) { | |
| 112 XINCREF(next); | |
| 113 tb->tb_next = next; | |
| 114 XINCREF(frame); | |
| 115 tb->tb_frame = frame; | |
| 116 tb->tb_lasti = lasti; | |
| 117 tb->tb_lineno = lineno; | |
| 118 } | |
| 119 return tb; | |
| 120 } | |
| 121 | |
| 122 static tracebackobject *tb_current = NULL; | |
| 123 | |
| 124 int | |
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125 tb_here(frame) |
| 86 | 126 frameobject *frame; |
| 127 { | |
| 128 tracebackobject *tb; | |
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129 tb = newtracebackobject(tb_current, frame, frame->f_lasti, frame->f_lineno); |
| 86 | 130 if (tb == NULL) |
| 131 return -1; | |
| 132 XDECREF(tb_current); | |
| 133 tb_current = tb; | |
| 134 return 0; | |
| 135 } | |
| 136 | |
| 137 object * | |
| 138 tb_fetch() | |
| 139 { | |
| 140 object *v; | |
| 141 v = (object *)tb_current; | |
| 142 tb_current = NULL; | |
| 143 return v; | |
| 144 } | |
| 145 | |
| 146 int | |
| 147 tb_store(v) | |
| 148 object *v; | |
| 149 { | |
| 150 if (v != NULL && !is_tracebackobject(v)) { | |
| 151 err_badcall(); | |
| 152 return -1; | |
| 153 } | |
| 154 XDECREF(tb_current); | |
| 155 XINCREF(v); | |
| 156 tb_current = (tracebackobject *)v; | |
| 157 return 0; | |
| 158 } | |
| 159 | |
| 160 static void | |
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161 tb_displayline(f, filename, lineno, name) |
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162 object *f; |
| 86 | 163 char *filename; |
| 164 int lineno; | |
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165 char *name; |
| 86 | 166 { |
| 167 FILE *xfp; | |
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168 char linebuf[1000]; |
| 86 | 169 int i; |
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170 #ifdef MPW |
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171 /* This is needed by MPW's File and Line commands */ |
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172 #define FMT " File \"%.900s\"; line %d # in %s\n" |
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173 #else |
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174 /* This is needed by Emacs' compile command */ |
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175 #define FMT " File \"%.900s\", line %d, in %s\n" |
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176 #endif |
| 86 | 177 xfp = fopen(filename, "r"); |
| 178 if (xfp == NULL) { | |
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179 /* Search tail of filename in sys.path before giving up */ |
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180 object *path; |
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181 char *tail = strrchr(filename, SEP); |
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182 if (tail == NULL) |
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183 tail = filename; |
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184 else |
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185 tail++; |
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186 path = sysget("path"); |
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187 if (path != NULL && is_listobject(path)) { |
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188 int npath = getlistsize(path); |
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189 int taillen = strlen(tail); |
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190 char namebuf[MAXPATHLEN+1]; |
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191 for (i = 0; i < npath; i++) { |
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192 object *v = getlistitem(path, i); |
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193 if (is_stringobject(v)) { |
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194 int len; |
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195 len = getstringsize(v); |
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196 if (len + 1 + taillen >= MAXPATHLEN) |
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197 continue; /* Too long */ |
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198 strcpy(namebuf, getstringvalue(v)); |
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199 if (strlen(namebuf) != len) |
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200 continue; /* v contains '\0' */ |
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201 if (len > 0 && namebuf[len-1] != SEP) |
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202 namebuf[len++] = SEP; |
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203 strcpy(namebuf+len, tail); |
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204 xfp = fopen(namebuf, "r"); |
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205 if (xfp != NULL) { |
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206 filename = namebuf; |
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207 break; |
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208 } |
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209 } |
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210 } |
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211 } |
| 86 | 212 } |
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213 sprintf(linebuf, FMT, filename, lineno, name); |
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214 writestring(linebuf, f); |
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215 if (xfp == NULL) |
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216 return; |
| 86 | 217 for (i = 0; i < lineno; i++) { |
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218 if (fgets(linebuf, sizeof linebuf, xfp) == NULL) |
| 86 | 219 break; |
| 220 } | |
| 221 if (i == lineno) { | |
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222 char *p = linebuf; |
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223 while (*p == ' ' || *p == '\t' || *p == '\014') |
| 86 | 224 p++; |
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225 writestring(" ", f); |
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226 writestring(p, f); |
| 86 | 227 if (strchr(p, '\n') == NULL) |
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228 writestring("\n", f); |
| 86 | 229 } |
| 230 fclose(xfp); | |
| 231 } | |
| 232 | |
| 233 static void | |
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234 tb_printinternal(tb, f, limit) |
| 86 | 235 tracebackobject *tb; |
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236 object *f; |
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237 int limit; |
| 86 | 238 { |
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239 int depth = 0; |
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240 tracebackobject *tb1 = tb; |
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241 while (tb1 != NULL) { |
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242 depth++; |
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243 tb1 = tb1->tb_next; |
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244 } |
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245 while (tb != NULL && !intrcheck()) { |
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246 if (depth <= limit) |
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247 tb_displayline(f, |
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248 getstringvalue(tb->tb_frame->f_code->co_filename), |
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249 tb->tb_lineno, |
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250 getstringvalue(tb->tb_frame->f_code->co_name)); |
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251 depth--; |
| 86 | 252 tb = tb->tb_next; |
| 253 } | |
| 254 } | |
| 255 | |
| 256 int | |
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257 tb_print(v, f) |
| 86 | 258 object *v; |
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259 object *f; |
| 86 | 260 { |
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261 object *limitv; |
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262 int limit = 1000; |
| 86 | 263 if (v == NULL) |
| 264 return 0; | |
| 265 if (!is_tracebackobject(v)) { | |
| 266 err_badcall(); | |
| 267 return -1; | |
| 268 } | |
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269 limitv = sysget("tracebacklimit"); |
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270 if (limitv && is_intobject(limitv)) { |
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271 limit = getintvalue(limitv); |
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272 if (limit <= 0) |
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273 return 0; |
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274 } |
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275 writestring("Traceback (innermost last):\n", f); |
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276 tb_printinternal((tracebackobject *)v, f, limit); |
| 86 | 277 return 0; |
| 278 } |