| 1 | /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 | * | |
| 3 | * ***** BEGIN LICENSE BLOCK ***** | |
| 4 | * Version: MPL 1.1/GPL 2.0/LGPL 2.1 | |
| 5 | * | |
| 6 | * The contents of this file are subject to the Mozilla Public License Version | |
| 7 | * 1.1 (the "License"); you may not use this file except in compliance with | |
| 8 | * the License. You may obtain a copy of the License at | |
| 9 | * http://www.mozilla.org/MPL/ | |
| 10 | * | |
| 11 | * Software distributed under the License is distributed on an "AS IS" basis, | |
| 12 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License | |
| 13 | * for the specific language governing rights and limitations under the | |
| 14 | * License. | |
| 15 | * | |
| 16 | * The Original Code is Mozilla Communicator client code, released | |
| 17 | * March 31, 1998. | |
| 18 | * | |
| 19 | * The Initial Developer of the Original Code is | |
| 20 | * Netscape Communications Corporation. | |
| 21 | * Portions created by the Initial Developer are Copyright (C) 1998 | |
| 22 | * the Initial Developer. All Rights Reserved. | |
| 23 | * | |
| 24 | * Contributor(s): | |
| 25 | * | |
| 26 | * Alternatively, the contents of this file may be used under the terms of | |
| 27 | * either of the GNU General Public License Version 2 or later (the "GPL"), | |
| 28 | * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), | |
| 29 | * in which case the provisions of the GPL or the LGPL are applicable instead | |
| 30 | * of those above. If you wish to allow use of your version of this file only | |
| 31 | * under the terms of either the GPL or the LGPL, and not to allow others to | |
| 32 | * use your version of this file under the terms of the MPL, indicate your | |
| 33 | * decision by deleting the provisions above and replace them with the notice | |
| 34 | * and other provisions required by the GPL or the LGPL. If you do not delete | |
| 35 | * the provisions above, a recipient may use your version of this file under | |
| 36 | * the terms of any one of the MPL, the GPL or the LGPL. | |
| 37 | * | |
| 38 | * ***** END LICENSE BLOCK ***** */ | |
| 39 | ||
| 40 | /* | |
| 41 | * JS standard exception implementation. | |
| 42 | */ | |
| 43 | ||
| 44 | #include "jsstddef.h" | |
| 45 | #include <stdlib.h> | |
| 46 | #include <string.h> | |
| 47 | #include "jstypes.h" | |
| 48 | #include "jsbit.h" | |
| 49 | #include "jsutil.h" /* Added by JSIFY */ | |
| 50 | #include "jsprf.h" | |
| 51 | #include "jsapi.h" | |
| 52 | #include "jscntxt.h" | |
| 53 | #include "jsconfig.h" | |
| 54 | #include "jsexn.h" | |
| 55 | #include "jsfun.h" | |
| 56 | #include "jsinterp.h" | |
| 57 | #include "jsopcode.h" | |
| 58 | #include "jsnum.h" | |
| 59 | #include "jsscript.h" | |
| 60 | ||
| 61 | #if JS_HAS_ERROR_EXCEPTIONS | |
| 62 | #if !JS_HAS_EXCEPTIONS | |
| 63 | # error "JS_HAS_EXCEPTIONS must be defined to use JS_HAS_ERROR_EXCEPTIONS" | |
| 64 | #endif | |
| 65 | ||
| 66 | /* XXX consider adding rt->atomState.messageAtom */ | |
| 67 | static char js_message_str[] = "message"; | |
| 68 | static char js_filename_str[] = "fileName"; | |
| 69 | static char js_lineno_str[] = "lineNumber"; | |
| 70 | static char js_stack_str[] = "stack"; | |
| 71 | ||
| 72 | /* Forward declarations for ExceptionClass's initializer. */ | |
| 73 | static JSBool | |
| 74 | Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval); | |
| 75 | ||
| 76 | static void | |
| 77 | exn_finalize(JSContext *cx, JSObject *obj); | |
| 78 | ||
| 79 | static JSClass ExceptionClass = { | |
| 80 | "Error", | |
| 81 | JSCLASS_HAS_PRIVATE, | |
| 82 | JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, | |
| 83 | JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, exn_finalize, | |
| 84 | NULL, NULL, NULL, Exception, | |
| 85 | NULL, NULL, NULL, 0 | |
| 86 | }; | |
| 87 | ||
| 88 | /* | |
| 89 | * A copy of the JSErrorReport originally generated. | |
| 90 | */ | |
| 91 | typedef struct JSExnPrivate { | |
| 92 | JSErrorReport *errorReport; | |
| 93 | } JSExnPrivate; | |
| 94 | ||
| 95 | /* | |
| 96 | * Undo all the damage done by exn_newPrivate. | |
| 97 | */ | |
| 98 | static void | |
| 99 | exn_destroyPrivate(JSContext *cx, JSExnPrivate *privateData) | |
| 100 | 0 | { |
| 101 | 0 | JSErrorReport *report; |
| 102 | 0 | const jschar **args; |
| 103 | ||
| 104 | 0 | if (!privateData) |
| 105 | 0 | return; |
| 106 | 0 | report = privateData->errorReport; |
| 107 | 0 | if (report) { |
| 108 | 0 | if (report->uclinebuf) |
| 109 | 0 | JS_free(cx, (void *)report->uclinebuf); |
| 110 | 0 | if (report->filename) |
| 111 | 0 | JS_free(cx, (void *)report->filename); |
| 112 | 0 | if (report->ucmessage) |
| 113 | 0 | JS_free(cx, (void *)report->ucmessage); |
| 114 | 0 | if (report->messageArgs) { |
| 115 | 0 | args = report->messageArgs; |
| 116 | 0 | while (*args != NULL) |
| 117 | 0 | JS_free(cx, (void *)*args++); |
| 118 | 0 | JS_free(cx, (void *)report->messageArgs); |
| 119 | } | |
| 120 | 0 | JS_free(cx, report); |
| 121 | } | |
| 122 | 0 | JS_free(cx, privateData); |
| 123 | } | |
| 124 | ||
| 125 | /* | |
| 126 | * Copy everything interesting about an error into allocated memory. | |
| 127 | */ | |
| 128 | static JSExnPrivate * | |
| 129 | exn_newPrivate(JSContext *cx, JSErrorReport *report) | |
| 130 | 0 | { |
| 131 | 0 | intN i; |
| 132 | 0 | JSExnPrivate *newPrivate; |
| 133 | 0 | JSErrorReport *newReport; |
| 134 | 0 | size_t capacity; |
| 135 | ||
| 136 | 0 | newPrivate = (JSExnPrivate *)JS_malloc(cx, sizeof (JSExnPrivate)); |
| 137 | 0 | if (!newPrivate) |
| 138 | 0 | return NULL; |
| 139 | 0 | memset(newPrivate, 0, sizeof (JSExnPrivate)); |
| 140 | ||
| 141 | /* Copy the error report */ | |
| 142 | 0 | newReport = (JSErrorReport *)JS_malloc(cx, sizeof (JSErrorReport)); |
| 143 | 0 | if (!newReport) |
| 144 | 0 | goto error; |
| 145 | 0 | memset(newReport, 0, sizeof (JSErrorReport)); |
| 146 | 0 | newPrivate->errorReport = newReport; |
| 147 | ||
| 148 | 0 | if (report->filename != NULL) { |
| 149 | 0 | newReport->filename = JS_strdup(cx, report->filename); |
| 150 | 0 | if (!newReport->filename) |
| 151 | 0 | goto error; |
| 152 | } else { | |
| 153 | 0 | newReport->filename = NULL; |
| 154 | } | |
| 155 | ||
| 156 | 0 | newReport->lineno = report->lineno; |
| 157 | ||
| 158 | /* | |
| 159 | * We don't need to copy linebuf and tokenptr, because they | |
| 160 | * point into the deflated string cache. (currently?) | |
| 161 | */ | |
| 162 | 0 | newReport->linebuf = report->linebuf; |
| 163 | 0 | newReport->tokenptr = report->tokenptr; |
| 164 | ||
| 165 | /* | |
| 166 | * But we do need to copy uclinebuf, uctokenptr, because they're | |
| 167 | * pointers into internal tokenstream structs, and may go away. | |
| 168 | */ | |
| 169 | 0 | if (report->uclinebuf != NULL) { |
| 170 | 0 | capacity = js_strlen(report->uclinebuf) + 1; |
| 171 | 0 | newReport->uclinebuf = |
| 172 | (const jschar *)JS_malloc(cx, capacity * sizeof(jschar)); | |
| 173 | 0 | if (!newReport->uclinebuf) |
| 174 | 0 | goto error; |
| 175 | 0 | js_strncpy((jschar *)newReport->uclinebuf, report->uclinebuf, capacity); |
| 176 | 0 | newReport->uctokenptr = newReport->uclinebuf + (report->uctokenptr - |
| 177 | report->uclinebuf); | |
| 178 | } else { | |
| 179 | 0 | newReport->uclinebuf = newReport->uctokenptr = NULL; |
| 180 | } | |
| 181 | ||
| 182 | 0 | if (report->ucmessage != NULL) { |
| 183 | 0 | capacity = js_strlen(report->ucmessage) + 1; |
| 184 | 0 | newReport->ucmessage = (const jschar *) |
| 185 | JS_malloc(cx, capacity * sizeof(jschar)); | |
| 186 | 0 | if (!newReport->ucmessage) |
| 187 | 0 | goto error; |
| 188 | 0 | js_strncpy((jschar *)newReport->ucmessage, report->ucmessage, capacity); |
| 189 | ||
| 190 | 0 | if (report->messageArgs) { |
| 191 | 0 | for (i = 0; report->messageArgs[i] != NULL; i++) |
| 192 | 0 | continue; |
| 193 | 0 | JS_ASSERT(i); |
| 194 | 0 | newReport->messageArgs = |
| 195 | (const jschar **)JS_malloc(cx, (i + 1) * sizeof(jschar *)); | |
| 196 | 0 | if (!newReport->messageArgs) |
| 197 | 0 | goto error; |
| 198 | 0 | for (i = 0; report->messageArgs[i] != NULL; i++) { |
| 199 | 0 | capacity = js_strlen(report->messageArgs[i]) + 1; |
| 200 | 0 | newReport->messageArgs[i] = |
| 201 | (const jschar *)JS_malloc(cx, capacity * sizeof(jschar)); | |
| 202 | 0 | if (!newReport->messageArgs[i]) |
| 203 | 0 | goto error; |
| 204 | 0 | js_strncpy((jschar *)(newReport->messageArgs[i]), |
| 205 | report->messageArgs[i], capacity); | |
| 206 | } | |
| 207 | 0 | newReport->messageArgs[i] = NULL; |
| 208 | } else { | |
| 209 | 0 | newReport->messageArgs = NULL; |
| 210 | } | |
| 211 | } else { | |
| 212 | 0 | newReport->ucmessage = NULL; |
| 213 | 0 | newReport->messageArgs = NULL; |
| 214 | } | |
| 215 | 0 | newReport->errorNumber = report->errorNumber; |
| 216 | ||
| 217 | /* Note that this is before it gets flagged with JSREPORT_EXCEPTION */ | |
| 218 | 0 | newReport->flags = report->flags; |
| 219 | ||
| 220 | 0 | return newPrivate; |
| 221 | error: | |
| 222 | 0 | exn_destroyPrivate(cx, newPrivate); |
| 223 | 0 | return NULL; |
| 224 | } | |
| 225 | ||
| 226 | static void | |
| 227 | exn_finalize(JSContext *cx, JSObject *obj) | |
| 228 | 136 | { |
| 229 | 136 | JSExnPrivate *privateData; |
| 230 | 136 | jsval privateValue; |
| 231 | ||
| 232 | 136 | privateValue = OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE); |
| 233 | ||
| 234 | 136 | if (!JSVAL_IS_VOID(privateValue)) { |
| 235 | 0 | privateData = (JSExnPrivate*) JSVAL_TO_PRIVATE(privateValue); |
| 236 | 0 | if (privateData) |
| 237 | 0 | exn_destroyPrivate(cx, privateData); |
| 238 | } | |
| 239 | } | |
| 240 | ||
| 241 | JSErrorReport * | |
| 242 | js_ErrorFromException(JSContext *cx, jsval exn) | |
| 243 | 0 | { |
| 244 | 0 | JSObject *obj; |
| 245 | 0 | JSExnPrivate *privateData; |
| 246 | 0 | jsval privateValue; |
| 247 | ||
| 248 | 0 | if (JSVAL_IS_PRIMITIVE(exn)) |
| 249 | 0 | return NULL; |
| 250 | 0 | obj = JSVAL_TO_OBJECT(exn); |
| 251 | 0 | if (OBJ_GET_CLASS(cx, obj) != &ExceptionClass) |
| 252 | 0 | return NULL; |
| 253 | 0 | privateValue = OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE); |
| 254 | 0 | if (JSVAL_IS_VOID(privateValue)) |
| 255 | 0 | return NULL; |
| 256 | 0 | privateData = (JSExnPrivate*) JSVAL_TO_PRIVATE(privateValue); |
| 257 | 0 | if (!privateData) |
| 258 | 0 | return NULL; |
| 259 | ||
| 260 | 0 | JS_ASSERT(privateData->errorReport); |
| 261 | 0 | return privateData->errorReport; |
| 262 | } | |
| 263 | ||
| 264 | /* | |
| 265 | * This must be kept in synch with the exceptions array below. | |
| 266 | * XXX use a jsexn.tbl file a la jsopcode.tbl | |
| 267 | */ | |
| 268 | typedef enum JSExnType { | |
| 269 | JSEXN_NONE = -1, | |
| 270 | JSEXN_ERR, | |
| 271 | JSEXN_INTERNALERR, | |
| 272 | JSEXN_EVALERR, | |
| 273 | JSEXN_RANGEERR, | |
| 274 | JSEXN_REFERENCEERR, | |
| 275 | JSEXN_SYNTAXERR, | |
| 276 | JSEXN_TYPEERR, | |
| 277 | JSEXN_URIERR, | |
| 278 | JSEXN_LIMIT | |
| 279 | } JSExnType; | |
| 280 | ||
| 281 | struct JSExnSpec { | |
| 282 | int protoIndex; | |
| 283 | const char *name; | |
| 284 | JSNative native; | |
| 285 | }; | |
| 286 | ||
| 287 | /* | |
| 288 | * All *Error constructors share the same JSClass, ExceptionClass. But each | |
| 289 | * constructor function for an *Error class must have a distinct native 'call' | |
| 290 | * function pointer, in order for instanceof to work properly across multiple | |
| 291 | * standard class sets. See jsfun.c:fun_hasInstance. | |
| 292 | */ | |
| 293 | #define MAKE_EXCEPTION_CTOR(name) \ | |
| 294 | const char js_##name##_str[] = #name; \ | |
| 295 | static JSBool \ | |
| 296 | name(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) \ | |
| 297 | { \ | |
| 298 | return Exception(cx, obj, argc, argv, rval); \ | |
| 299 | } | |
| 300 | ||
| 301 | 0 | MAKE_EXCEPTION_CTOR(Error) |
| 302 | 0 | MAKE_EXCEPTION_CTOR(InternalError) |
| 303 | 0 | MAKE_EXCEPTION_CTOR(EvalError) |
| 304 | 0 | MAKE_EXCEPTION_CTOR(RangeError) |
| 305 | 0 | MAKE_EXCEPTION_CTOR(ReferenceError) |
| 306 | 0 | MAKE_EXCEPTION_CTOR(SyntaxError) |
| 307 | 0 | MAKE_EXCEPTION_CTOR(TypeError) |
| 308 | 0 | MAKE_EXCEPTION_CTOR(URIError) |
| 309 | ||
| 310 | #undef MAKE_EXCEPTION_CTOR | |
| 311 | ||
| 312 | static struct JSExnSpec exceptions[] = { | |
| 313 | { JSEXN_NONE, js_Error_str, Error }, | |
| 314 | { JSEXN_ERR, js_InternalError_str, InternalError }, | |
| 315 | { JSEXN_ERR, js_EvalError_str, EvalError }, | |
| 316 | { JSEXN_ERR, js_RangeError_str, RangeError }, | |
| 317 | { JSEXN_ERR, js_ReferenceError_str, ReferenceError }, | |
| 318 | { JSEXN_ERR, js_SyntaxError_str, SyntaxError }, | |
| 319 | { JSEXN_ERR, js_TypeError_str, TypeError }, | |
| 320 | { JSEXN_ERR, js_URIError_str, URIError }, | |
| 321 | {0,NULL,NULL} | |
| 322 | }; | |
| 323 | ||
| 324 | static JSBool | |
| 325 | InitExceptionObject(JSContext *cx, JSObject *obj, JSString *message, | |
| 326 | JSString *filename, uintN lineno) | |
| 327 | { | |
| 328 | 0 | JSCheckAccessOp checkAccess; |
| 329 | 0 | JSErrorReporter older; |
| 330 | 0 | JSExceptionState *state; |
| 331 | 0 | jschar *stackbuf; |
| 332 | 0 | size_t stacklen, stackmax; |
| 333 | 0 | JSStackFrame *fp; |
| 334 | 0 | jsval callerid, v; |
| 335 | 0 | JSBool ok; |
| 336 | 0 | JSString *argsrc, *stack; |
| 337 | 0 | uintN i, ulineno; |
| 338 | 0 | const char *cp; |
| 339 | 0 | char ulnbuf[11]; |
| 340 | ||
| 341 | 0 | if (!JS_DefineProperty(cx, obj, js_message_str, STRING_TO_JSVAL(message), |
| 342 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 343 | 0 | return JS_FALSE; |
| 344 | } | |
| 345 | ||
| 346 | 0 | if (!JS_DefineProperty(cx, obj, js_filename_str, |
| 347 | STRING_TO_JSVAL(filename), | |
| 348 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 349 | 0 | return JS_FALSE; |
| 350 | } | |
| 351 | ||
| 352 | 0 | if (!JS_DefineProperty(cx, obj, js_lineno_str, |
| 353 | INT_TO_JSVAL(lineno), | |
| 354 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 355 | 0 | return JS_FALSE; |
| 356 | } | |
| 357 | ||
| 358 | /* | |
| 359 | * Set the 'stack' property. | |
| 360 | * | |
| 361 | * First, set aside any error reporter for cx and save its exception state | |
| 362 | * so we can suppress any checkAccess failures. Such failures should stop | |
| 363 | * the backtrace procedure, not result in a failure of this constructor. | |
| 364 | */ | |
| 365 | 0 | checkAccess = cx->runtime->checkObjectAccess; |
| 366 | 0 | if (checkAccess) { |
| 367 | 0 | older = JS_SetErrorReporter(cx, NULL); |
| 368 | 0 | state = JS_SaveExceptionState(cx); |
| 369 | } | |
| 370 | #ifdef __GNUC__ /* suppress bogus gcc warnings */ | |
| 371 | else { | |
| 372 | 0 | older = NULL; |
| 373 | 0 | state = NULL; |
| 374 | } | |
| 375 | #endif | |
| 376 | 0 | callerid = ATOM_KEY(cx->runtime->atomState.callerAtom); |
| 377 | ||
| 378 | /* | |
| 379 | * Prepare to allocate a jschar buffer at stackbuf, where stacklen indexes | |
| 380 | * the next free jschar slot, and with room for at most stackmax non-null | |
| 381 | * jschars. If stackbuf is non-null, it always contains an extra slot for | |
| 382 | * the null terminator we'll store at the end, as a backstop. | |
| 383 | * | |
| 384 | * All early returns must goto done after this point, till the after-loop | |
| 385 | * cleanup code has run! | |
| 386 | */ | |
| 387 | 0 | stackbuf = NULL; |
| 388 | 0 | stacklen = stackmax = 0; |
| 389 | 0 | ok = JS_TRUE; |
| 390 | ||
| 391 | #define APPEND_CHAR_TO_STACK(c) \ | |
| 392 | JS_BEGIN_MACRO \ | |
| 393 | if (stacklen == stackmax) { \ | |
| 394 | void *ptr_; \ | |
| 395 | stackmax = stackmax ? 2 * stackmax : 64; \ | |
| 396 | ptr_ = JS_realloc(cx, stackbuf, (stackmax+1) * sizeof(jschar)); \ | |
| 397 | if (!ptr_) { \ | |
| 398 | ok = JS_FALSE; \ | |
| 399 | goto done; \ | |
| 400 | } \ | |
| 401 | stackbuf = ptr_; \ | |
| 402 | } \ | |
| 403 | stackbuf[stacklen++] = (c); \ | |
| 404 | JS_END_MACRO | |
| 405 | ||
| 406 | #define APPEND_STRING_TO_STACK(str) \ | |
| 407 | JS_BEGIN_MACRO \ | |
| 408 | JSString *str_ = str; \ | |
| 409 | size_t length_ = JSSTRING_LENGTH(str_); \ | |
| 410 | if (stacklen + length_ > stackmax) { \ | |
| 411 | void *ptr_; \ | |
| 412 | stackmax = JS_BIT(JS_CeilingLog2(stacklen + length_)); \ | |
| 413 | ptr_ = JS_realloc(cx, stackbuf, (stackmax+1) * sizeof(jschar)); \ | |
| 414 | if (!ptr_) { \ | |
| 415 | ok = JS_FALSE; \ | |
| 416 | goto done; \ | |
| 417 | } \ | |
| 418 | stackbuf = ptr_; \ | |
| 419 | } \ | |
| 420 | js_strncpy(stackbuf + stacklen, JSSTRING_CHARS(str_), length_); \ | |
| 421 | stacklen += length_; \ | |
| 422 | JS_END_MACRO | |
| 423 | ||
| 424 | 0 | for (fp = cx->fp; fp; fp = fp->down) { |
| 425 | 0 | if (checkAccess) { |
| 426 | 0 | v = (fp->fun && fp->argv) ? fp->argv[-2] : JSVAL_NULL; |
| 427 | 0 | if (!JSVAL_IS_PRIMITIVE(v)) { |
| 428 | 0 | ok = checkAccess(cx, fp->fun->object, callerid, JSACC_READ, &v); |
| 429 | 0 | if (!ok) { |
| 430 | 0 | ok = JS_TRUE; |
| 431 | 0 | break; |
| 432 | } | |
| 433 | } | |
| 434 | } | |
| 435 | ||
| 436 | 0 | if (fp->fun) { |
| 437 | 0 | if (fp->fun->atom) |
| 438 | 0 | APPEND_STRING_TO_STACK(ATOM_TO_STRING(fp->fun->atom)); |
| 439 | ||
| 440 | 0 | APPEND_CHAR_TO_STACK('('); |
| 441 | 0 | for (i = 0; i < fp->argc; i++) { |
| 442 | /* Avoid toSource bloat and fallibility for object types. */ | |
| 443 | 0 | v = fp->argv[i]; |
| 444 | 0 | if (JSVAL_IS_PRIMITIVE(v)) { |
| 445 | 0 | argsrc = js_ValueToSource(cx, v); |
| 446 | 0 | } else if (JSVAL_IS_FUNCTION(cx, v)) { |
| 447 | /* XXX Avoid function decompilation bloat for now. */ | |
| 448 | 0 | argsrc = JS_GetFunctionId(JS_ValueToFunction(cx, v)); |
| 449 | 0 | if (!argsrc) |
| 450 | 0 | argsrc = js_ValueToSource(cx, v); |
| 451 | } else { | |
| 452 | /* XXX Avoid toString on objects, it takes too long and | |
| 453 | uses too much memory, for too many classes (see | |
| 454 | Mozilla bug 166743). */ | |
| 455 | 0 | char buf[100]; |
| 456 | 0 | JS_snprintf(buf, sizeof buf, "[object %s]", |
| 457 | OBJ_GET_CLASS(cx, JSVAL_TO_OBJECT(v))->name); | |
| 458 | 0 | argsrc = JS_NewStringCopyZ(cx, buf); |
| 459 | } | |
| 460 | 0 | if (!argsrc) { |
| 461 | 0 | ok = JS_FALSE; |
| 462 | 0 | goto done; |
| 463 | } | |
| 464 | 0 | if (i > 0) |
| 465 | 0 | APPEND_CHAR_TO_STACK(','); |
| 466 | 0 | APPEND_STRING_TO_STACK(argsrc); |
| 467 | } | |
| 468 | 0 | APPEND_CHAR_TO_STACK(')'); |
| 469 | } | |
| 470 | ||
| 471 | 0 | APPEND_CHAR_TO_STACK('@'); |
| 472 | 0 | if (fp->script && fp->script->filename) { |
| 473 | 0 | for (cp = fp->script->filename; *cp; cp++) |
| 474 | 0 | APPEND_CHAR_TO_STACK(*cp); |
| 475 | } | |
| 476 | 0 | APPEND_CHAR_TO_STACK(':'); |
| 477 | 0 | if (fp->script && fp->pc) { |
| 478 | 0 | ulineno = js_PCToLineNumber(cx, fp->script, fp->pc); |
| 479 | 0 | JS_snprintf(ulnbuf, sizeof ulnbuf, "%u", ulineno); |
| 480 | 0 | for (cp = ulnbuf; *cp; cp++) |
| 481 | 0 | APPEND_CHAR_TO_STACK(*cp); |
| 482 | } else { | |
| 483 | 0 | APPEND_CHAR_TO_STACK('0'); |
| 484 | } | |
| 485 | 0 | APPEND_CHAR_TO_STACK('\n'); |
| 486 | } | |
| 487 | ||
| 488 | #undef APPEND_CHAR_TO_STACK | |
| 489 | #undef APPEND_STRING_TO_STACK | |
| 490 | ||
| 491 | done: | |
| 492 | 0 | if (checkAccess) { |
| 493 | 0 | if (ok) |
| 494 | 0 | JS_RestoreExceptionState(cx, state); |
| 495 | else | |
| 496 | 0 | JS_DropExceptionState(cx, state); |
| 497 | 0 | JS_SetErrorReporter(cx, older); |
| 498 | } | |
| 499 | 0 | if (!ok) { |
| 500 | 0 | JS_free(cx, stackbuf); |
| 501 | 0 | return JS_FALSE; |
| 502 | } | |
| 503 | ||
| 504 | 0 | if (!stackbuf) { |
| 505 | 0 | stack = cx->runtime->emptyString; |
| 506 | } else { | |
| 507 | /* NB: if stackbuf was allocated, it has room for the terminator. */ | |
| 508 | 0 | JS_ASSERT(stacklen <= stackmax); |
| 509 | 0 | if (stacklen < stackmax) { |
| 510 | /* | |
| 511 | * Realloc can fail when shrinking on some FreeBSD versions, so | |
| 512 | * don't use JS_realloc here; simply let the oversized allocation | |
| 513 | * be owned by the string in that rare case. | |
| 514 | */ | |
| 515 | 0 | void *shrunk = realloc(stackbuf, (stacklen+1) * sizeof(jschar)); |
| 516 | 0 | if (shrunk) |
| 517 | 0 | stackbuf = shrunk; |
| 518 | } | |
| 519 | 0 | stackbuf[stacklen] = 0; |
| 520 | 0 | stack = js_NewString(cx, stackbuf, stacklen, 0); |
| 521 | 0 | if (!stack) { |
| 522 | 0 | JS_free(cx, stackbuf); |
| 523 | 0 | return JS_FALSE; |
| 524 | } | |
| 525 | } | |
| 526 | 0 | return JS_DefineProperty(cx, obj, js_stack_str, |
| 527 | STRING_TO_JSVAL(stack), | |
| 528 | NULL, NULL, JSPROP_ENUMERATE); | |
| 529 | } | |
| 530 | ||
| 531 | static JSBool | |
| 532 | Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) | |
| 533 | 0 | { |
| 534 | 0 | JSBool ok; |
| 535 | 0 | jsval pval; |
| 536 | 0 | int32 lineno; |
| 537 | 0 | JSString *message, *filename; |
| 538 | ||
| 539 | 0 | if (cx->creatingException) |
| 540 | 0 | return JS_FALSE; |
| 541 | 0 | cx->creatingException = JS_TRUE; |
| 542 | ||
| 543 | 0 | if (!(cx->fp->flags & JSFRAME_CONSTRUCTING)) { |
| 544 | /* | |
| 545 | * ECMA ed. 3, 15.11.1 requires Error, etc., to construct even when | |
| 546 | * called as functions, without operator new. But as we do not give | |
| 547 | * each constructor a distinct JSClass, whose .name member is used by | |
| 548 | * js_NewObject to find the class prototype, we must get the class | |
| 549 | * prototype ourselves. | |
| 550 | */ | |
| 551 | 0 | ok = OBJ_GET_PROPERTY(cx, JSVAL_TO_OBJECT(argv[-2]), |
| 552 | (jsid)cx->runtime->atomState.classPrototypeAtom, | |
| 553 | &pval); | |
| 554 | 0 | if (!ok) |
| 555 | 0 | goto out; |
| 556 | 0 | obj = js_NewObject(cx, &ExceptionClass, JSVAL_TO_OBJECT(pval), NULL); |
| 557 | 0 | if (!obj) { |
| 558 | 0 | ok = JS_FALSE; |
| 559 | 0 | goto out; |
| 560 | } | |
| 561 | 0 | *rval = OBJECT_TO_JSVAL(obj); |
| 562 | } | |
| 563 | ||
| 564 | /* | |
| 565 | * If it's a new object of class Exception, then null out the private | |
| 566 | * data so that the finalizer doesn't attempt to free it. | |
| 567 | */ | |
| 568 | 0 | if (OBJ_GET_CLASS(cx, obj) == &ExceptionClass) |
| 569 | 0 | OBJ_SET_SLOT(cx, obj, JSSLOT_PRIVATE, JSVAL_VOID); |
| 570 | ||
| 571 | /* Set the 'message' property. */ | |
| 572 | 0 | if (argc != 0) { |
| 573 | 0 | message = js_ValueToString(cx, argv[0]); |
| 574 | 0 | if (!message) { |
| 575 | 0 | ok = JS_FALSE; |
| 576 | 0 | goto out; |
| 577 | } | |
| 578 | } else { | |
| 579 | 0 | message = cx->runtime->emptyString; |
| 580 | } | |
| 581 | ||
| 582 | /* Set the 'fileName' property. */ | |
| 583 | 0 | if (argc > 1) { |
| 584 | 0 | filename = js_ValueToString(cx, argv[1]); |
| 585 | 0 | if (!filename) { |
| 586 | 0 | ok = JS_FALSE; |
| 587 | 0 | goto out; |
| 588 | } | |
| 589 | } else { | |
| 590 | 0 | filename = cx->runtime->emptyString; |
| 591 | } | |
| 592 | ||
| 593 | /* Set the 'lineNumber' property. */ | |
| 594 | 0 | if (argc > 2) { |
| 595 | 0 | ok = js_ValueToInt32(cx, argv[2], &lineno); |
| 596 | 0 | if (!ok) |
| 597 | 0 | goto out; |
| 598 | } else { | |
| 599 | 0 | lineno = 0; |
| 600 | } | |
| 601 | ||
| 602 | 0 | ok = InitExceptionObject(cx, obj, message, filename, lineno); |
| 603 | ||
| 604 | out: | |
| 605 | 0 | cx->creatingException = JS_FALSE; |
| 606 | 0 | return ok; |
| 607 | } | |
| 608 | ||
| 609 | /* | |
| 610 | * Convert to string. | |
| 611 | * | |
| 612 | * This method only uses JavaScript-modifiable properties name, message. It | |
| 613 | * is left to the host to check for private data and report filename and line | |
| 614 | * number information along with this message. | |
| 615 | */ | |
| 616 | static JSBool | |
| 617 | exn_toString(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) | |
| 618 | 0 | { |
| 619 | 0 | jsval v; |
| 620 | 0 | JSString *name, *message, *result; |
| 621 | 0 | jschar *chars, *cp; |
| 622 | 0 | size_t name_length, message_length, length; |
| 623 | ||
| 624 | 0 | if (!OBJ_GET_PROPERTY(cx, obj, (jsid)cx->runtime->atomState.nameAtom, &v)) |
| 625 | 0 | return JS_FALSE; |
| 626 | 0 | name = js_ValueToString(cx, v); |
| 627 | 0 | if (!name) |
| 628 | 0 | return JS_FALSE; |
| 629 | ||
| 630 | 0 | if (!JS_GetProperty(cx, obj, js_message_str, &v) || |
| 631 | !(message = js_ValueToString(cx, v))) { | |
| 632 | 0 | return JS_FALSE; |
| 633 | } | |
| 634 | ||
| 635 | 0 | if (JSSTRING_LENGTH(message) != 0) { |
| 636 | 0 | name_length = JSSTRING_LENGTH(name); |
| 637 | 0 | message_length = JSSTRING_LENGTH(message); |
| 638 | 0 | length = name_length + message_length + 2; |
| 639 | 0 | cp = chars = (jschar*) JS_malloc(cx, (length + 1) * sizeof(jschar)); |
| 640 | 0 | if (!chars) |
| 641 | 0 | return JS_FALSE; |
| 642 | ||
| 643 | 0 | js_strncpy(cp, JSSTRING_CHARS(name), name_length); |
| 644 | 0 | cp += name_length; |
| 645 | 0 | *cp++ = ':'; *cp++ = ' '; |
| 646 | 0 | js_strncpy(cp, JSSTRING_CHARS(message), message_length); |
| 647 | 0 | cp += message_length; |
| 648 | 0 | *cp = 0; |
| 649 | ||
| 650 | 0 | result = js_NewString(cx, chars, length, 0); |
| 651 | 0 | if (!result) { |
| 652 | 0 | JS_free(cx, chars); |
| 653 | 0 | return JS_FALSE; |
| 654 | } | |
| 655 | } else { | |
| 656 | 0 | result = name; |
| 657 | } | |
| 658 | ||
| 659 | 0 | *rval = STRING_TO_JSVAL(result); |
| 660 | 0 | return JS_TRUE; |
| 661 | } | |
| 662 | ||
| 663 | #if JS_HAS_TOSOURCE | |
| 664 | /* | |
| 665 | * Return a string that may eval to something similar to the original object. | |
| 666 | */ | |
| 667 | static JSBool | |
| 668 | exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval) | |
| 669 | 0 | { |
| 670 | 0 | jsval v; |
| 671 | 0 | JSString *name, *message, *filename, *lineno_as_str, *result; |
| 672 | 0 | int32 lineno; |
| 673 | 0 | size_t lineno_length, name_length, message_length, filename_length, length; |
| 674 | 0 | jschar *chars, *cp; |
| 675 | ||
| 676 | 0 | if (!OBJ_GET_PROPERTY(cx, obj, (jsid)cx->runtime->atomState.nameAtom, &v)) |
| 677 | 0 | return JS_FALSE; |
| 678 | 0 | name = js_ValueToString(cx, v); |
| 679 | 0 | if (!name) |
| 680 | 0 | return JS_FALSE; |
| 681 | ||
| 682 | 0 | if (!JS_GetProperty(cx, obj, js_message_str, &v) || |
| 683 | !(message = js_ValueToSource(cx, v))) { | |
| 684 | 0 | return JS_FALSE; |
| 685 | } | |
| 686 | ||
| 687 | 0 | if (!JS_GetProperty(cx, obj, js_filename_str, &v) || |
| 688 | !(filename = js_ValueToSource(cx, v))) { | |
| 689 | 0 | return JS_FALSE; |
| 690 | } | |
| 691 | ||
| 692 | 0 | if (!JS_GetProperty(cx, obj, js_lineno_str, &v) || |
| 693 | !js_ValueToInt32 (cx, v, &lineno)) { | |
| 694 | 0 | return JS_FALSE; |
| 695 | } | |
| 696 | ||
| 697 | 0 | if (lineno != 0) { |
| 698 | 0 | if (!(lineno_as_str = js_ValueToString(cx, v))) { |
| 699 | 0 | return JS_FALSE; |
| 700 | } | |
| 701 | 0 | lineno_length = JSSTRING_LENGTH(lineno_as_str); |
| 702 | } else { | |
| 703 | 0 | lineno_as_str = NULL; |
| 704 | 0 | lineno_length = 0; |
| 705 | } | |
| 706 | ||
| 707 | /* Magic 8, for the characters in ``(new ())''. */ | |
| 708 | 0 | name_length = JSSTRING_LENGTH(name); |
| 709 | 0 | message_length = JSSTRING_LENGTH(message); |
| 710 | 0 | length = 8 + name_length + message_length; |
| 711 | ||
| 712 | 0 | filename_length = JSSTRING_LENGTH(filename); |
| 713 | 0 | if (filename_length != 0) { |
| 714 | /* append filename as ``, {filename}'' */ | |
| 715 | 0 | length += 2 + filename_length; |
| 716 | 0 | if (lineno_as_str) { |
| 717 | /* append lineno as ``, {lineno_as_str}'' */ | |
| 718 | 0 | length += 2 + lineno_length; |
| 719 | } | |
| 720 | } else { | |
| 721 | 0 | if (lineno_as_str) { |
| 722 | /* | |
| 723 | * no filename, but have line number, | |
| 724 | * need to append ``, "", {lineno_as_str}'' | |
| 725 | */ | |
| 726 | 0 | length += 6 + lineno_length; |
| 727 | } | |
| 728 | } | |
| 729 | ||
| 730 | 0 | cp = chars = (jschar*) JS_malloc(cx, (length + 1) * sizeof(jschar)); |
| 731 | 0 | if (!chars) |
| 732 | 0 | return JS_FALSE; |
| 733 | ||
| 734 | 0 | *cp++ = '('; *cp++ = 'n'; *cp++ = 'e'; *cp++ = 'w'; *cp++ = ' '; |
| 735 | 0 | js_strncpy(cp, JSSTRING_CHARS(name), name_length); |
| 736 | 0 | cp += name_length; |
| 737 | 0 | *cp++ = '('; |
| 738 | 0 | if (message_length != 0) { |
| 739 | 0 | js_strncpy(cp, JSSTRING_CHARS(message), message_length); |
| 740 | 0 | cp += message_length; |
| 741 | } | |
| 742 | ||
| 743 | 0 | if (filename_length != 0) { |
| 744 | /* append filename as ``, {filename}'' */ | |
| 745 | 0 | *cp++ = ','; *cp++ = ' '; |
| 746 | 0 | js_strncpy(cp, JSSTRING_CHARS(filename), filename_length); |
| 747 | 0 | cp += filename_length; |
| 748 | } else { | |
| 749 | 0 | if (lineno_as_str) { |
| 750 | /* | |
| 751 | * no filename, but have line number, | |
| 752 | * need to append ``, "", {lineno_as_str}'' | |
| 753 | */ | |
| 754 | 0 | *cp++ = ','; *cp++ = ' '; *cp++ = '"'; *cp++ = '"'; |
| 755 | } | |
| 756 | } | |
| 757 | 0 | if (lineno_as_str) { |
| 758 | /* append lineno as ``, {lineno_as_str}'' */ | |
| 759 | 0 | *cp++ = ','; *cp++ = ' '; |
| 760 | 0 | js_strncpy(cp, JSSTRING_CHARS(lineno_as_str), lineno_length); |
| 761 | 0 | cp += lineno_length; |
| 762 | } | |
| 763 | ||
| 764 | 0 | *cp++ = ')'; *cp++ = ')'; *cp = 0; |
| 765 | ||
| 766 | 0 | result = js_NewString(cx, chars, length, 0); |
| 767 | 0 | if (!result) { |
| 768 | 0 | JS_free(cx, chars); |
| 769 | 0 | return JS_FALSE; |
| 770 | } | |
| 771 | 0 | *rval = STRING_TO_JSVAL(result); |
| 772 | 0 | return JS_TRUE; |
| 773 | } | |
| 774 | #endif | |
| 775 | ||
| 776 | static JSFunctionSpec exception_methods[] = { | |
| 777 | #if JS_HAS_TOSOURCE | |
| 778 | {js_toSource_str, exn_toSource, 0,0,0}, | |
| 779 | #endif | |
| 780 | {js_toString_str, exn_toString, 0,0,0}, | |
| 781 | {0,0,0,0,0} | |
| 782 | }; | |
| 783 | ||
| 784 | JSObject * | |
| 785 | js_InitExceptionClasses(JSContext *cx, JSObject *obj) | |
| 786 | 17 | { |
| 787 | 17 | int i; |
| 788 | 17 | JSObject *protos[JSEXN_LIMIT]; |
| 789 | ||
| 790 | /* Initialize the prototypes first. */ | |
| 791 | 153 | for (i = 0; exceptions[i].name != 0; i++) { |
| 792 | 136 | JSAtom *atom; |
| 793 | 136 | JSFunction *fun; |
| 794 | 136 | JSString *nameString; |
| 795 | 136 | int protoIndex = exceptions[i].protoIndex; |
| 796 | ||
| 797 | /* Make the prototype for the current constructor name. */ | |
| 798 | 136 | protos[i] = js_NewObject(cx, &ExceptionClass, |
| 799 | (protoIndex != JSEXN_NONE) | |
| 800 | ? protos[protoIndex] | |
| 801 | : NULL, | |
| 802 | obj); | |
| 803 | 136 | if (!protos[i]) |
| 804 | 0 | return NULL; |
| 805 | ||
| 806 | /* So exn_finalize knows whether to destroy private data. */ | |
| 807 | 136 | OBJ_SET_SLOT(cx, protos[i], JSSLOT_PRIVATE, JSVAL_VOID); |
| 808 | ||
| 809 | 136 | atom = js_Atomize(cx, exceptions[i].name, strlen(exceptions[i].name), 0); |
| 810 | 136 | if (!atom) |
| 811 | 0 | return NULL; |
| 812 | ||
| 813 | /* Make a constructor function for the current name. */ | |
| 814 | 136 | fun = js_DefineFunction(cx, obj, atom, exceptions[i].native, 3, 0); |
| 815 | 136 | if (!fun) |
| 816 | 0 | return NULL; |
| 817 | ||
| 818 | /* Make this constructor make objects of class Exception. */ | |
| 819 | 136 | fun->clasp = &ExceptionClass; |
| 820 | ||
| 821 | /* Make the prototype and constructor links. */ | |
| 822 | 136 | if (!js_SetClassPrototype(cx, fun->object, protos[i], |
| 823 | JSPROP_READONLY | JSPROP_PERMANENT)) { | |
| 824 | 0 | return NULL; |
| 825 | } | |
| 826 | ||
| 827 | /* proto bootstrap bit from JS_InitClass omitted. */ | |
| 828 | 136 | nameString = JS_NewStringCopyZ(cx, exceptions[i].name); |
| 829 | 136 | if (!nameString) |
| 830 | 0 | return NULL; |
| 831 | ||
| 832 | /* Add the name property to the prototype. */ | |
| 833 | 136 | if (!JS_DefineProperty(cx, protos[i], js_name_str, |
| 834 | STRING_TO_JSVAL(nameString), | |
| 835 | NULL, NULL, | |
| 836 | JSPROP_ENUMERATE)) { | |
| 837 | 0 | return NULL; |
| 838 | } | |
| 839 | } | |
| 840 | ||
| 841 | /* | |
| 842 | * Add an empty message property. (To Exception.prototype only, | |
| 843 | * because this property will be the same for all the exception | |
| 844 | * protos.) | |
| 845 | */ | |
| 846 | 17 | if (!JS_DefineProperty(cx, protos[0], js_message_str, |
| 847 | STRING_TO_JSVAL(cx->runtime->emptyString), | |
| 848 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 849 | 0 | return NULL; |
| 850 | } | |
| 851 | 17 | if (!JS_DefineProperty(cx, protos[0], js_filename_str, |
| 852 | STRING_TO_JSVAL(cx->runtime->emptyString), | |
| 853 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 854 | 0 | return NULL; |
| 855 | } | |
| 856 | 17 | if (!JS_DefineProperty(cx, protos[0], js_lineno_str, |
| 857 | INT_TO_JSVAL(0), | |
| 858 | NULL, NULL, JSPROP_ENUMERATE)) { | |
| 859 | 0 | return NULL; |
| 860 | } | |
| 861 | ||
| 862 | /* | |
| 863 | * Add methods only to Exception.prototype, because ostensibly all | |
| 864 | * exception types delegate to that. | |
| 865 | */ | |
| 866 | 17 | if (!JS_DefineFunctions(cx, protos[0], exception_methods)) |
| 867 | 0 | return NULL; |
| 868 | ||
| 869 | 17 | return protos[0]; |
| 870 | } | |
| 871 | ||
| 872 | static JSExnType errorToExceptionNum[] = { | |
| 873 | #define MSG_DEF(name, number, count, exception, format) \ | |
| 874 | exception, | |
| 875 | #include "js.msg" | |
| 876 | #undef MSG_DEF | |
| 877 | }; | |
| 878 | ||
| 879 | #if defined ( DEBUG_mccabe ) && defined ( PRINTNAMES ) | |
| 880 | /* For use below... get character strings for error name and exception name */ | |
| 881 | static struct exnname { char *name; char *exception; } errortoexnname[] = { | |
| 882 | #define MSG_DEF(name, number, count, exception, format) \ | |
| 883 | {#name, #exception}, | |
| 884 | #include "js.msg" | |
| 885 | #undef MSG_DEF | |
| 886 | }; | |
| 887 | #endif /* DEBUG */ | |
| 888 | ||
| 889 | JSBool | |
| 890 | js_ErrorToException(JSContext *cx, const char *message, JSErrorReport *reportp) | |
| 891 | 0 | { |
| 892 | 0 | JSErrNum errorNumber; |
| 893 | 0 | JSExnType exn; |
| 894 | 0 | JSBool ok; |
| 895 | 0 | JSObject *errProto, *errObject; |
| 896 | 0 | JSString *messageStr, *filenameStr; |
| 897 | 0 | uintN lineno; |
| 898 | 0 | JSExnPrivate *privateData; |
| 899 | ||
| 900 | /* | |
| 901 | * Tell our caller to report immediately if cx has no active frames, or if | |
| 902 | * this report is just a warning. | |
| 903 | */ | |
| 904 | 0 | JS_ASSERT(reportp); |
| 905 | 0 | if (!cx->fp || JSREPORT_IS_WARNING(reportp->flags)) |
| 906 | 0 | return JS_FALSE; |
| 907 | ||
| 908 | /* Find the exception index associated with this error. */ | |
| 909 | 0 | errorNumber = (JSErrNum) reportp->errorNumber; |
| 910 | 0 | exn = errorToExceptionNum[errorNumber]; |
| 911 | 0 | JS_ASSERT(exn < JSEXN_LIMIT); |
| 912 | ||
| 913 | #if defined( DEBUG_mccabe ) && defined ( PRINTNAMES ) | |
| 914 | /* Print the error name and the associated exception name to stderr */ | |
| 915 | fprintf(stderr, "%s\t%s\n", | |
| 916 | errortoexnname[errorNumber].name, | |
| 917 | errortoexnname[errorNumber].exception); | |
| 918 | #endif | |
| 919 | ||
| 920 | /* | |
| 921 | * Return false (no exception raised) if no exception is associated | |
| 922 | * with the given error number. | |
| 923 | */ | |
| 924 | 0 | if (exn == JSEXN_NONE) |
| 925 | 0 | return JS_FALSE; |
| 926 | ||
| 927 | /* | |
| 928 | * Prevent runaway recursion, just as the Exception native constructor | |
| 929 | * must do, via cx->creatingException. If an out-of-memory error occurs, | |
| 930 | * no exception object will be created, but we don't assume that OOM is | |
| 931 | * the only kind of error that subroutines of this function called below | |
| 932 | * might raise. | |
| 933 | */ | |
| 934 | 0 | if (cx->creatingException) |
| 935 | 0 | return JS_FALSE; |
| 936 | 0 | cx->creatingException = JS_TRUE; |
| 937 | ||
| 938 | /* | |
| 939 | * Try to get an appropriate prototype by looking up the corresponding | |
| 940 | * exception constructor name in the scope chain of the current context's | |
| 941 | * top stack frame, or in the global object if no frame is active. | |
| 942 | * | |
| 943 | * XXXbe hack around JSCLASS_NEW_RESOLVE code in js_LookupProperty that | |
| 944 | * checks cx->fp, cx->fp->pc, and js_CodeSpec[*cx->fp->pc] in order | |
| 945 | * to compute resolve flags such as JSRESOLVE_ASSIGNING. The bug | |
| 946 | * is that this "internal" js_GetClassPrototype call may trigger a | |
| 947 | * resolve of exceptions[exn].name if the global object uses a lazy | |
| 948 | * standard class resolver (see JS_ResolveStandardClass), but the | |
| 949 | * current frame and bytecode end up affecting the resolve flags. | |
| 950 | */ | |
| 951 | { | |
| 952 | 0 | JSStackFrame *fp = cx->fp; |
| 953 | 0 | jsbytecode *pc = NULL; |
| 954 | ||
| 955 | 0 | if (fp) { |
| 956 | 0 | pc = fp->pc; |
| 957 | 0 | fp->pc = NULL; |
| 958 | } | |
| 959 | 0 | ok = js_GetClassPrototype(cx, exceptions[exn].name, &errProto); |
| 960 | 0 | if (pc) |
| 961 | 0 | fp->pc = pc; |
| 962 | 0 | if (!ok) |
| 963 | 0 | goto out; |
| 964 | } | |
| 965 | ||
| 966 | 0 | errObject = js_NewObject(cx, &ExceptionClass, errProto, NULL); |
| 967 | 0 | if (!errObject) { |
| 968 | 0 | ok = JS_FALSE; |
| 969 | 0 | goto out; |
| 970 | } | |
| 971 | ||
| 972 | /* | |
| 973 | * Set the generated Exception object early, so it won't be GC'd by a last | |
| 974 | * ditch attempt to collect garbage, or a GC that otherwise nests or races | |
| 975 | * under any of the following calls. If one of the following calls fails, | |
| 976 | * it will overwrite this exception object with one of its own (except in | |
| 977 | * case of OOM errors, of course). | |
| 978 | */ | |
| 979 | 0 | JS_SetPendingException(cx, OBJECT_TO_JSVAL(errObject)); |
| 980 | ||
| 981 | 0 | messageStr = JS_NewStringCopyZ(cx, message); |
| 982 | 0 | if (!messageStr) { |
| 983 | 0 | ok = JS_FALSE; |
| 984 | 0 | goto out; |
| 985 | } | |
| 986 | ||
| 987 | 0 | if (reportp) { |
| 988 | 0 | filenameStr = JS_NewStringCopyZ(cx, reportp->filename); |
| 989 | 0 | if (!filenameStr) { |
| 990 | 0 | ok = JS_FALSE; |
| 991 | 0 | goto out; |
| 992 | } | |
| 993 | 0 | lineno = reportp->lineno; |
| 994 | } else { | |
| 995 | 0 | filenameStr = cx->runtime->emptyString; |
| 996 | 0 | lineno = 0; |
| 997 | } | |
| 998 | 0 | ok = InitExceptionObject(cx, errObject, messageStr, filenameStr, lineno); |
| 999 | 0 | if (!ok) |
| 1000 | 0 | goto out; |
| 1001 | ||
| 1002 | /* | |
| 1003 | * Construct a new copy of the error report struct, and store it in the | |
| 1004 | * exception object's private data. We can't use the error report struct | |
| 1005 | * that was passed in, because it's stack-allocated, and also because it | |
| 1006 | * may point to transient data in the JSTokenStream. | |
| 1007 | */ | |
| 1008 | 0 | privateData = exn_newPrivate(cx, reportp); |
| 1009 | 0 | if (!privateData) { |
| 1010 | 0 | ok = JS_FALSE; |
| 1011 | 0 | goto out; |
| 1012 | } | |
| 1013 | 0 | OBJ_SET_SLOT(cx, errObject, JSSLOT_PRIVATE, PRIVATE_TO_JSVAL(privateData)); |
| 1014 | ||
| 1015 | /* Flag the error report passed in to indicate an exception was raised. */ | |
| 1016 | 0 | reportp->flags |= JSREPORT_EXCEPTION; |
| 1017 | ||
| 1018 | out: | |
| 1019 | 0 | cx->creatingException = JS_FALSE; |
| 1020 | 0 | return ok; |
| 1021 | } | |
| 1022 | #endif /* JS_HAS_ERROR_EXCEPTIONS */ | |
| 1023 | ||
| 1024 | #if JS_HAS_EXCEPTIONS | |
| 1025 | ||
| 1026 | JSBool | |
| 1027 | js_ReportUncaughtException(JSContext *cx) | |
| 1028 | 0 | { |
| 1029 | 0 | JSObject *exnObject; |
| 1030 | 0 | JSString *str; |
| 1031 | 0 | jsval exn; |
| 1032 | 0 | JSErrorReport *reportp; |
| 1033 | 0 | const char *bytes; |
| 1034 | ||
| 1035 | 0 | if (!JS_IsExceptionPending(cx)) |
| 1036 | 0 | return JS_FALSE; |
| 1037 | ||
| 1038 | 0 | if (!JS_GetPendingException(cx, &exn)) |
| 1039 | 0 | return JS_FALSE; |
| 1040 | ||
| 1041 | /* | |
| 1042 | * Because js_ValueToString below could error and an exception object | |
| 1043 | * could become unrooted, we root it here. | |
| 1044 | */ | |
| 1045 | 0 | if (JSVAL_IS_OBJECT(exn) && exn != JSVAL_NULL) { |
| 1046 | 0 | exnObject = JSVAL_TO_OBJECT(exn); |
| 1047 | 0 | if (!js_AddRoot(cx, &exnObject, "exn.report.root")) |
| 1048 | 0 | return JS_FALSE; |
| 1049 | } else { | |
| 1050 | 0 | exnObject = NULL; |
| 1051 | } | |
| 1052 | ||
| 1053 | #if JS_HAS_ERROR_EXCEPTIONS | |
| 1054 | 0 | reportp = js_ErrorFromException(cx, exn); |
| 1055 | #else | |
| 1056 | reportp = NULL; | |
| 1057 | #endif | |
| 1058 | ||
| 1059 | 0 | str = js_ValueToString(cx, exn); |
| 1060 | 0 | bytes = str ? js_GetStringBytes(str) : "null"; |
| 1061 | ||
| 1062 | 0 | if (reportp == NULL) { |
| 1063 | /* | |
| 1064 | * XXXmccabe todo: Instead of doing this, synthesize an error report | |
| 1065 | * struct that includes the filename, lineno where the exception was | |
| 1066 | * originally thrown. | |
| 1067 | */ | |
| 1068 | 0 | JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, |
| 1069 | JSMSG_UNCAUGHT_EXCEPTION, bytes); | |
| 1070 | } else { | |
| 1071 | /* Flag the error as an exception. */ | |
| 1072 | 0 | reportp->flags |= JSREPORT_EXCEPTION; |
| 1073 | 0 | js_ReportErrorAgain(cx, bytes, reportp); |
| 1074 | } | |
| 1075 | ||
| 1076 | 0 | if (exnObject != NULL) |
| 1077 | 0 | js_RemoveRoot(cx->runtime, &exnObject); |
| 1078 | 0 | return JS_TRUE; |
| 1079 | } | |
| 1080 |