Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 1 | // Copyright 2012 the V8 project authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | // ------------------------------------------------------------------- |
| 6 | |
| 7 | (function(global, utils) { |
| 8 | |
| 9 | %CheckIsBootstrapping(); |
| 10 | |
| 11 | // ------------------------------------------------------------------- |
| 12 | // Imports |
| 13 | |
| 14 | var ArrayJoin; |
| 15 | var Bool16x8ToString; |
| 16 | var Bool32x4ToString; |
| 17 | var Bool8x16ToString; |
| 18 | var callSiteReceiverSymbol = |
| 19 | utils.ImportNow("call_site_receiver_symbol"); |
| 20 | var callSiteFunctionSymbol = |
| 21 | utils.ImportNow("call_site_function_symbol"); |
| 22 | var callSitePositionSymbol = |
| 23 | utils.ImportNow("call_site_position_symbol"); |
| 24 | var callSiteStrictSymbol = |
| 25 | utils.ImportNow("call_site_strict_symbol"); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 26 | var callSiteWasmObjectSymbol = |
| 27 | utils.ImportNow("call_site_wasm_obj_symbol"); |
| 28 | var callSiteWasmFunctionIndexSymbol = |
| 29 | utils.ImportNow("call_site_wasm_func_index_symbol"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 30 | var Float32x4ToString; |
| 31 | var formattedStackTraceSymbol = |
| 32 | utils.ImportNow("formatted_stack_trace_symbol"); |
| 33 | var GlobalObject = global.Object; |
| 34 | var Int16x8ToString; |
| 35 | var Int32x4ToString; |
| 36 | var Int8x16ToString; |
| 37 | var InternalArray = utils.InternalArray; |
| 38 | var internalErrorSymbol = utils.ImportNow("internal_error_symbol"); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 39 | var ObjectHasOwnProperty; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 40 | var ObjectToString = utils.ImportNow("object_to_string"); |
| 41 | var Script = utils.ImportNow("Script"); |
| 42 | var stackTraceSymbol = utils.ImportNow("stack_trace_symbol"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 43 | var StringIndexOf; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 44 | var SymbolToString; |
| 45 | var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol"); |
| 46 | var Uint16x8ToString; |
| 47 | var Uint32x4ToString; |
| 48 | var Uint8x16ToString; |
| 49 | |
| 50 | utils.Import(function(from) { |
| 51 | ArrayJoin = from.ArrayJoin; |
| 52 | Bool16x8ToString = from.Bool16x8ToString; |
| 53 | Bool32x4ToString = from.Bool32x4ToString; |
| 54 | Bool8x16ToString = from.Bool8x16ToString; |
| 55 | Float32x4ToString = from.Float32x4ToString; |
| 56 | Int16x8ToString = from.Int16x8ToString; |
| 57 | Int32x4ToString = from.Int32x4ToString; |
| 58 | Int8x16ToString = from.Int8x16ToString; |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 59 | ObjectHasOwnProperty = from.ObjectHasOwnProperty; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 60 | StringIndexOf = from.StringIndexOf; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 61 | SymbolToString = from.SymbolToString; |
| 62 | Uint16x8ToString = from.Uint16x8ToString; |
| 63 | Uint32x4ToString = from.Uint32x4ToString; |
| 64 | Uint8x16ToString = from.Uint8x16ToString; |
| 65 | }); |
| 66 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 67 | // ------------------------------------------------------------------- |
| 68 | |
| 69 | var GlobalError; |
| 70 | var GlobalTypeError; |
| 71 | var GlobalRangeError; |
| 72 | var GlobalURIError; |
| 73 | var GlobalSyntaxError; |
| 74 | var GlobalReferenceError; |
| 75 | var GlobalEvalError; |
| 76 | |
| 77 | |
| 78 | function NoSideEffectsObjectToString() { |
| 79 | if (IS_UNDEFINED(this)) return "[object Undefined]"; |
| 80 | if (IS_NULL(this)) return "[object Null]"; |
| 81 | var O = TO_OBJECT(this); |
| 82 | var builtinTag = %_ClassOf(O); |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 83 | var tag = %GetDataProperty(O, toStringTagSymbol); |
| 84 | if (!IS_STRING(tag)) { |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 85 | tag = builtinTag; |
| 86 | } |
| 87 | return `[object ${tag}]`; |
| 88 | } |
| 89 | |
| 90 | function IsErrorObject(obj) { |
| 91 | return HAS_PRIVATE(obj, stackTraceSymbol); |
| 92 | } |
| 93 | |
| 94 | function NoSideEffectsErrorToString() { |
| 95 | var name = %GetDataProperty(this, "name"); |
| 96 | var message = %GetDataProperty(this, "message"); |
| 97 | name = IS_UNDEFINED(name) ? "Error" : NoSideEffectsToString(name); |
| 98 | message = IS_UNDEFINED(message) ? "" : NoSideEffectsToString(message); |
| 99 | if (name == "") return message; |
| 100 | if (message == "") return name; |
| 101 | return `${name}: ${message}`; |
| 102 | } |
| 103 | |
| 104 | function NoSideEffectsToString(obj) { |
| 105 | if (IS_STRING(obj)) return obj; |
| 106 | if (IS_NUMBER(obj)) return %_NumberToString(obj); |
| 107 | if (IS_BOOLEAN(obj)) return obj ? 'true' : 'false'; |
| 108 | if (IS_UNDEFINED(obj)) return 'undefined'; |
| 109 | if (IS_NULL(obj)) return 'null'; |
| 110 | if (IS_FUNCTION(obj)) { |
| 111 | var str = %FunctionToString(obj); |
| 112 | if (str.length > 128) { |
| 113 | str = %_SubString(str, 0, 111) + "...<omitted>..." + |
| 114 | %_SubString(str, str.length - 2, str.length); |
| 115 | } |
| 116 | return str; |
| 117 | } |
| 118 | if (IS_SYMBOL(obj)) return %_Call(SymbolToString, obj); |
| 119 | if (IS_SIMD_VALUE(obj)) { |
| 120 | switch (typeof(obj)) { |
| 121 | case 'float32x4': return %_Call(Float32x4ToString, obj); |
| 122 | case 'int32x4': return %_Call(Int32x4ToString, obj); |
| 123 | case 'int16x8': return %_Call(Int16x8ToString, obj); |
| 124 | case 'int8x16': return %_Call(Int8x16ToString, obj); |
| 125 | case 'uint32x4': return %_Call(Uint32x4ToString, obj); |
| 126 | case 'uint16x8': return %_Call(Uint16x8ToString, obj); |
| 127 | case 'uint8x16': return %_Call(Uint8x16ToString, obj); |
| 128 | case 'bool32x4': return %_Call(Bool32x4ToString, obj); |
| 129 | case 'bool16x8': return %_Call(Bool16x8ToString, obj); |
| 130 | case 'bool8x16': return %_Call(Bool8x16ToString, obj); |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | if (IS_RECEIVER(obj)) { |
| 135 | // When internally formatting error objects, use a side-effects-free version |
| 136 | // of Error.prototype.toString independent of the actually installed |
| 137 | // toString method. |
| 138 | if (IsErrorObject(obj) || |
| 139 | %GetDataProperty(obj, "toString") === ErrorToString) { |
| 140 | return %_Call(NoSideEffectsErrorToString, obj); |
| 141 | } |
| 142 | |
| 143 | if (%GetDataProperty(obj, "toString") === ObjectToString) { |
| 144 | var constructor = %GetDataProperty(obj, "constructor"); |
| 145 | if (IS_FUNCTION(constructor)) { |
| 146 | var constructor_name = %FunctionGetName(constructor); |
| 147 | if (constructor_name != "") return `#<${constructor_name}>`; |
| 148 | } |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | return %_Call(NoSideEffectsObjectToString, obj); |
| 153 | } |
| 154 | |
| 155 | |
| 156 | function MakeGenericError(constructor, type, arg0, arg1, arg2) { |
| 157 | var error = new constructor(FormatMessage(type, arg0, arg1, arg2)); |
| 158 | error[internalErrorSymbol] = true; |
| 159 | return error; |
| 160 | } |
| 161 | |
| 162 | |
| 163 | /** |
| 164 | * Set up the Script function and constructor. |
| 165 | */ |
| 166 | %FunctionSetInstanceClassName(Script, 'Script'); |
| 167 | %AddNamedProperty(Script.prototype, 'constructor', Script, |
| 168 | DONT_ENUM | DONT_DELETE | READ_ONLY); |
| 169 | %SetCode(Script, function(x) { |
| 170 | // Script objects can only be created by the VM. |
| 171 | throw MakeError(kUnsupported); |
| 172 | }); |
| 173 | |
| 174 | |
| 175 | // Helper functions; called from the runtime system. |
| 176 | function FormatMessage(type, arg0, arg1, arg2) { |
| 177 | var arg0 = NoSideEffectsToString(arg0); |
| 178 | var arg1 = NoSideEffectsToString(arg1); |
| 179 | var arg2 = NoSideEffectsToString(arg2); |
| 180 | try { |
| 181 | return %FormatMessageString(type, arg0, arg1, arg2); |
| 182 | } catch (e) { |
| 183 | return "<error>"; |
| 184 | } |
| 185 | } |
| 186 | |
| 187 | |
| 188 | function GetLineNumber(message) { |
| 189 | var start_position = %MessageGetStartPosition(message); |
| 190 | if (start_position == -1) return kNoLineNumberInfo; |
| 191 | var script = %MessageGetScript(message); |
| 192 | var location = script.locationFromPosition(start_position, true); |
| 193 | if (location == null) return kNoLineNumberInfo; |
| 194 | return location.line + 1; |
| 195 | } |
| 196 | |
| 197 | |
| 198 | //Returns the offset of the given position within the containing line. |
| 199 | function GetColumnNumber(message) { |
| 200 | var script = %MessageGetScript(message); |
| 201 | var start_position = %MessageGetStartPosition(message); |
| 202 | var location = script.locationFromPosition(start_position, true); |
| 203 | if (location == null) return -1; |
| 204 | return location.column; |
| 205 | } |
| 206 | |
| 207 | |
| 208 | // Returns the source code line containing the given source |
| 209 | // position, or the empty string if the position is invalid. |
| 210 | function GetSourceLine(message) { |
| 211 | var script = %MessageGetScript(message); |
| 212 | var start_position = %MessageGetStartPosition(message); |
| 213 | var location = script.locationFromPosition(start_position, true); |
| 214 | if (location == null) return ""; |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 215 | return location.sourceText; |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 216 | } |
| 217 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 218 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 219 | /** |
| 220 | * Get information on a specific source position. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 221 | * Returns an object with the following following properties: |
| 222 | * script : script object for the source |
| 223 | * line : source line number |
| 224 | * column : source column within the line |
| 225 | * position : position within the source |
| 226 | * sourceText : a string containing the current line |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 227 | * @param {number} position The source position |
| 228 | * @param {boolean} include_resource_offset Set to true to have the resource |
| 229 | * offset added to the location |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 230 | * @return If line is negative or not in the source null is returned. |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 231 | */ |
| 232 | function ScriptLocationFromPosition(position, |
| 233 | include_resource_offset) { |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 234 | return %ScriptPositionInfo(this, position, !!include_resource_offset); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 235 | } |
| 236 | |
| 237 | |
| 238 | /** |
| 239 | * If sourceURL comment is available returns sourceURL comment contents. |
| 240 | * Otherwise, script name is returned. See |
| 241 | * http://fbug.googlecode.com/svn/branches/firebug1.1/docs/ReleaseNotes_1.1.txt |
| 242 | * and Source Map Revision 3 proposal for details on using //# sourceURL and |
| 243 | * deprecated //@ sourceURL comment to identify scripts that don't have name. |
| 244 | * |
| 245 | * @return {?string} script name if present, value for //# sourceURL comment or |
| 246 | * deprecated //@ sourceURL comment otherwise. |
| 247 | */ |
| 248 | function ScriptNameOrSourceURL() { |
| 249 | if (this.source_url) return this.source_url; |
| 250 | return this.name; |
| 251 | } |
| 252 | |
| 253 | |
| 254 | utils.SetUpLockedPrototype(Script, [ |
| 255 | "source", |
| 256 | "name", |
| 257 | "source_url", |
| 258 | "source_mapping_url", |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 259 | "line_offset", |
| 260 | "column_offset" |
| 261 | ], [ |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 262 | "locationFromPosition", ScriptLocationFromPosition, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 263 | "nameOrSourceURL", ScriptNameOrSourceURL, |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 264 | ] |
| 265 | ); |
| 266 | |
| 267 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 268 | function GetStackTraceLine(recv, fun, pos, isGlobal) { |
| 269 | return new CallSite(recv, fun, pos, false).toString(); |
| 270 | } |
| 271 | |
| 272 | // ---------------------------------------------------------------------------- |
| 273 | // Error implementation |
| 274 | |
| 275 | function CallSite(receiver, fun, pos, strict_mode) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 276 | // For wasm frames, receiver is the wasm object and fun is the function index |
| 277 | // instead of an actual function. |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 278 | if (!IS_FUNCTION(fun) && !%IsWasmObject(receiver)) { |
| 279 | throw MakeTypeError(kCallSiteExpectsFunction, typeof receiver, typeof fun); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | if (IS_UNDEFINED(new.target)) { |
| 283 | return new CallSite(receiver, fun, pos, strict_mode); |
| 284 | } |
| 285 | |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 286 | if (IS_FUNCTION(fun)) { |
| 287 | SET_PRIVATE(this, callSiteReceiverSymbol, receiver); |
| 288 | SET_PRIVATE(this, callSiteFunctionSymbol, fun); |
| 289 | } else { |
| 290 | SET_PRIVATE(this, callSiteWasmObjectSymbol, receiver); |
| 291 | SET_PRIVATE(this, callSiteWasmFunctionIndexSymbol, TO_UINT32(fun)); |
| 292 | } |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 293 | SET_PRIVATE(this, callSitePositionSymbol, TO_INT32(pos)); |
| 294 | SET_PRIVATE(this, callSiteStrictSymbol, TO_BOOLEAN(strict_mode)); |
| 295 | } |
| 296 | |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 297 | function CheckCallSite(obj, name) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 298 | if (!IS_RECEIVER(obj) || !HAS_PRIVATE(obj, callSitePositionSymbol)) { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 299 | throw MakeTypeError(kCallSiteMethod, name); |
| 300 | } |
| 301 | } |
| 302 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 303 | function CallSiteGetThis() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 304 | CheckCallSite(this, "getThis"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 305 | return GET_PRIVATE(this, callSiteStrictSymbol) |
| 306 | ? UNDEFINED : GET_PRIVATE(this, callSiteReceiverSymbol); |
| 307 | } |
| 308 | |
| 309 | function CallSiteGetFunction() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 310 | CheckCallSite(this, "getFunction"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 311 | return GET_PRIVATE(this, callSiteStrictSymbol) |
| 312 | ? UNDEFINED : GET_PRIVATE(this, callSiteFunctionSymbol); |
| 313 | } |
| 314 | |
| 315 | function CallSiteGetPosition() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 316 | CheckCallSite(this, "getPosition"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 317 | return GET_PRIVATE(this, callSitePositionSymbol); |
| 318 | } |
| 319 | |
| 320 | function CallSiteGetTypeName() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 321 | CheckCallSite(this, "getTypeName"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 322 | return GetTypeName(GET_PRIVATE(this, callSiteReceiverSymbol), false); |
| 323 | } |
| 324 | |
| 325 | function CallSiteIsToplevel() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 326 | CheckCallSite(this, "isTopLevel"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 327 | return %CallSiteIsToplevelRT(this); |
| 328 | } |
| 329 | |
| 330 | function CallSiteIsEval() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 331 | CheckCallSite(this, "isEval"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 332 | return %CallSiteIsEvalRT(this); |
| 333 | } |
| 334 | |
| 335 | function CallSiteGetEvalOrigin() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 336 | CheckCallSite(this, "getEvalOrigin"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 337 | var script = %FunctionGetScript(GET_PRIVATE(this, callSiteFunctionSymbol)); |
| 338 | return FormatEvalOrigin(script); |
| 339 | } |
| 340 | |
| 341 | function CallSiteGetScriptNameOrSourceURL() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 342 | CheckCallSite(this, "getScriptNameOrSourceURL"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 343 | return %CallSiteGetScriptNameOrSourceUrlRT(this); |
| 344 | } |
| 345 | |
| 346 | function CallSiteGetFunctionName() { |
| 347 | // See if the function knows its own name |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 348 | CheckCallSite(this, "getFunctionName"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 349 | return %CallSiteGetFunctionNameRT(this); |
| 350 | } |
| 351 | |
| 352 | function CallSiteGetMethodName() { |
| 353 | // See if we can find a unique property on the receiver that holds |
| 354 | // this function. |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 355 | CheckCallSite(this, "getMethodName"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 356 | return %CallSiteGetMethodNameRT(this); |
| 357 | } |
| 358 | |
| 359 | function CallSiteGetFileName() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 360 | CheckCallSite(this, "getFileName"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 361 | return %CallSiteGetFileNameRT(this); |
| 362 | } |
| 363 | |
| 364 | function CallSiteGetLineNumber() { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 365 | if (HAS_PRIVATE(this, callSiteWasmObjectSymbol)) { |
| 366 | return GET_PRIVATE(this, callSiteWasmFunctionIndexSymbol); |
| 367 | } |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 368 | CheckCallSite(this, "getLineNumber"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 369 | return %CallSiteGetLineNumberRT(this); |
| 370 | } |
| 371 | |
| 372 | function CallSiteGetColumnNumber() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 373 | CheckCallSite(this, "getColumnNumber"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 374 | return %CallSiteGetColumnNumberRT(this); |
| 375 | } |
| 376 | |
| 377 | function CallSiteIsNative() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 378 | CheckCallSite(this, "isNative"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 379 | return %CallSiteIsNativeRT(this); |
| 380 | } |
| 381 | |
| 382 | function CallSiteIsConstructor() { |
Ben Murdoch | da12d29 | 2016-06-02 14:46:10 +0100 | [diff] [blame] | 383 | CheckCallSite(this, "isConstructor"); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 384 | return %CallSiteIsConstructorRT(this); |
| 385 | } |
| 386 | |
| 387 | function CallSiteToString() { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 388 | if (HAS_PRIVATE(this, callSiteWasmObjectSymbol)) { |
| 389 | var funName = this.getFunctionName(); |
| 390 | var funcIndex = GET_PRIVATE(this, callSiteWasmFunctionIndexSymbol); |
| 391 | var pos = this.getPosition(); |
Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 392 | if (IS_NULL(funName)) funName = "<WASM UNNAMED>"; |
| 393 | return funName + " (<WASM>[" + funcIndex + "]+" + pos + ")"; |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 394 | } |
| 395 | |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 396 | var fileName; |
| 397 | var fileLocation = ""; |
| 398 | if (this.isNative()) { |
| 399 | fileLocation = "native"; |
| 400 | } else { |
| 401 | fileName = this.getScriptNameOrSourceURL(); |
| 402 | if (!fileName && this.isEval()) { |
| 403 | fileLocation = this.getEvalOrigin(); |
| 404 | fileLocation += ", "; // Expecting source position to follow. |
| 405 | } |
| 406 | |
| 407 | if (fileName) { |
| 408 | fileLocation += fileName; |
| 409 | } else { |
| 410 | // Source code does not originate from a file and is not native, but we |
| 411 | // can still get the source position inside the source string, e.g. in |
| 412 | // an eval string. |
| 413 | fileLocation += "<anonymous>"; |
| 414 | } |
| 415 | var lineNumber = this.getLineNumber(); |
| 416 | if (lineNumber != null) { |
| 417 | fileLocation += ":" + lineNumber; |
| 418 | var columnNumber = this.getColumnNumber(); |
| 419 | if (columnNumber) { |
| 420 | fileLocation += ":" + columnNumber; |
| 421 | } |
| 422 | } |
| 423 | } |
| 424 | |
| 425 | var line = ""; |
| 426 | var functionName = this.getFunctionName(); |
| 427 | var addSuffix = true; |
| 428 | var isConstructor = this.isConstructor(); |
| 429 | var isMethodCall = !(this.isToplevel() || isConstructor); |
| 430 | if (isMethodCall) { |
| 431 | var typeName = GetTypeName(GET_PRIVATE(this, callSiteReceiverSymbol), true); |
| 432 | var methodName = this.getMethodName(); |
| 433 | if (functionName) { |
| 434 | if (typeName && %_Call(StringIndexOf, functionName, typeName) != 0) { |
| 435 | line += typeName + "."; |
| 436 | } |
| 437 | line += functionName; |
| 438 | if (methodName && |
| 439 | (%_Call(StringIndexOf, functionName, "." + methodName) != |
| 440 | functionName.length - methodName.length - 1)) { |
| 441 | line += " [as " + methodName + "]"; |
| 442 | } |
| 443 | } else { |
| 444 | line += typeName + "." + (methodName || "<anonymous>"); |
| 445 | } |
| 446 | } else if (isConstructor) { |
| 447 | line += "new " + (functionName || "<anonymous>"); |
| 448 | } else if (functionName) { |
| 449 | line += functionName; |
| 450 | } else { |
| 451 | line += fileLocation; |
| 452 | addSuffix = false; |
| 453 | } |
| 454 | if (addSuffix) { |
| 455 | line += " (" + fileLocation + ")"; |
| 456 | } |
| 457 | return line; |
| 458 | } |
| 459 | |
| 460 | utils.SetUpLockedPrototype(CallSite, ["receiver", "fun", "pos"], [ |
| 461 | "getThis", CallSiteGetThis, |
| 462 | "getTypeName", CallSiteGetTypeName, |
| 463 | "isToplevel", CallSiteIsToplevel, |
| 464 | "isEval", CallSiteIsEval, |
| 465 | "getEvalOrigin", CallSiteGetEvalOrigin, |
| 466 | "getScriptNameOrSourceURL", CallSiteGetScriptNameOrSourceURL, |
| 467 | "getFunction", CallSiteGetFunction, |
| 468 | "getFunctionName", CallSiteGetFunctionName, |
| 469 | "getMethodName", CallSiteGetMethodName, |
| 470 | "getFileName", CallSiteGetFileName, |
| 471 | "getLineNumber", CallSiteGetLineNumber, |
| 472 | "getColumnNumber", CallSiteGetColumnNumber, |
| 473 | "isNative", CallSiteIsNative, |
| 474 | "getPosition", CallSiteGetPosition, |
| 475 | "isConstructor", CallSiteIsConstructor, |
| 476 | "toString", CallSiteToString |
| 477 | ]); |
| 478 | |
| 479 | |
| 480 | function FormatEvalOrigin(script) { |
| 481 | var sourceURL = script.nameOrSourceURL(); |
| 482 | if (sourceURL) { |
| 483 | return sourceURL; |
| 484 | } |
| 485 | |
| 486 | var eval_origin = "eval at "; |
| 487 | if (script.eval_from_function_name) { |
| 488 | eval_origin += script.eval_from_function_name; |
| 489 | } else { |
| 490 | eval_origin += "<anonymous>"; |
| 491 | } |
| 492 | |
| 493 | var eval_from_script = script.eval_from_script; |
| 494 | if (eval_from_script) { |
| 495 | if (eval_from_script.compilation_type == COMPILATION_TYPE_EVAL) { |
| 496 | // eval script originated from another eval. |
| 497 | eval_origin += " (" + FormatEvalOrigin(eval_from_script) + ")"; |
| 498 | } else { |
| 499 | // eval script originated from "real" source. |
| 500 | if (eval_from_script.name) { |
| 501 | eval_origin += " (" + eval_from_script.name; |
| 502 | var location = eval_from_script.locationFromPosition( |
| 503 | script.eval_from_script_position, true); |
| 504 | if (location) { |
| 505 | eval_origin += ":" + (location.line + 1); |
| 506 | eval_origin += ":" + (location.column + 1); |
| 507 | } |
| 508 | eval_origin += ")"; |
| 509 | } else { |
| 510 | eval_origin += " (unknown source)"; |
| 511 | } |
| 512 | } |
| 513 | } |
| 514 | |
| 515 | return eval_origin; |
| 516 | } |
| 517 | |
| 518 | |
| 519 | function FormatErrorString(error) { |
| 520 | try { |
| 521 | return %_Call(ErrorToString, error); |
| 522 | } catch (e) { |
| 523 | try { |
| 524 | return "<error: " + e + ">"; |
| 525 | } catch (ee) { |
| 526 | return "<error>"; |
| 527 | } |
| 528 | } |
| 529 | } |
| 530 | |
| 531 | |
| 532 | function GetStackFrames(raw_stack) { |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 533 | var internal_raw_stack = new InternalArray(); |
| 534 | %MoveArrayContents(raw_stack, internal_raw_stack); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 535 | var frames = new InternalArray(); |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 536 | var sloppy_frames = internal_raw_stack[0]; |
| 537 | for (var i = 1; i < internal_raw_stack.length; i += 4) { |
| 538 | var recv = internal_raw_stack[i]; |
| 539 | var fun = internal_raw_stack[i + 1]; |
| 540 | var code = internal_raw_stack[i + 2]; |
| 541 | var pc = internal_raw_stack[i + 3]; |
| 542 | // For traps in wasm, the bytecode offset is passed as (-1 - offset). |
| 543 | // Otherwise, lookup the position from the pc. |
| 544 | var pos = IS_NUMBER(fun) && pc < 0 ? (-1 - pc) : |
| 545 | %FunctionGetPositionForOffset(code, pc); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 546 | sloppy_frames--; |
| 547 | frames.push(new CallSite(recv, fun, pos, (sloppy_frames < 0))); |
| 548 | } |
| 549 | return frames; |
| 550 | } |
| 551 | |
| 552 | |
| 553 | // Flag to prevent recursive call of Error.prepareStackTrace. |
| 554 | var formatting_custom_stack_trace = false; |
| 555 | |
| 556 | |
| 557 | function FormatStackTrace(obj, raw_stack) { |
| 558 | var frames = GetStackFrames(raw_stack); |
| 559 | if (IS_FUNCTION(GlobalError.prepareStackTrace) && |
| 560 | !formatting_custom_stack_trace) { |
| 561 | var array = []; |
| 562 | %MoveArrayContents(frames, array); |
| 563 | formatting_custom_stack_trace = true; |
| 564 | var stack_trace = UNDEFINED; |
| 565 | try { |
| 566 | stack_trace = GlobalError.prepareStackTrace(obj, array); |
| 567 | } catch (e) { |
| 568 | throw e; // The custom formatting function threw. Rethrow. |
| 569 | } finally { |
| 570 | formatting_custom_stack_trace = false; |
| 571 | } |
| 572 | return stack_trace; |
| 573 | } |
| 574 | |
| 575 | var lines = new InternalArray(); |
| 576 | lines.push(FormatErrorString(obj)); |
| 577 | for (var i = 0; i < frames.length; i++) { |
| 578 | var frame = frames[i]; |
| 579 | var line; |
| 580 | try { |
| 581 | line = frame.toString(); |
| 582 | } catch (e) { |
| 583 | try { |
| 584 | line = "<error: " + e + ">"; |
| 585 | } catch (ee) { |
| 586 | // Any code that reaches this point is seriously nasty! |
| 587 | line = "<error>"; |
| 588 | } |
| 589 | } |
| 590 | lines.push(" at " + line); |
| 591 | } |
| 592 | return %_Call(ArrayJoin, lines, "\n"); |
| 593 | } |
| 594 | |
| 595 | |
| 596 | function GetTypeName(receiver, requireConstructor) { |
| 597 | if (IS_NULL_OR_UNDEFINED(receiver)) return null; |
| 598 | if (IS_PROXY(receiver)) return "Proxy"; |
| 599 | |
| 600 | var constructor = %GetDataProperty(TO_OBJECT(receiver), "constructor"); |
| 601 | if (!IS_FUNCTION(constructor)) { |
| 602 | return requireConstructor ? null : %_Call(NoSideEffectsToString, receiver); |
| 603 | } |
| 604 | return %FunctionGetName(constructor); |
| 605 | } |
| 606 | |
| 607 | |
| 608 | // Format the stack trace if not yet done, and return it. |
| 609 | // Cache the formatted stack trace on the holder. |
| 610 | var StackTraceGetter = function() { |
| 611 | var formatted_stack_trace = UNDEFINED; |
| 612 | var holder = this; |
| 613 | while (holder) { |
| 614 | var formatted_stack_trace = |
| 615 | GET_PRIVATE(holder, formattedStackTraceSymbol); |
| 616 | if (IS_UNDEFINED(formatted_stack_trace)) { |
| 617 | // No formatted stack trace available. |
| 618 | var stack_trace = GET_PRIVATE(holder, stackTraceSymbol); |
| 619 | if (IS_UNDEFINED(stack_trace)) { |
| 620 | // Neither formatted nor structured stack trace available. |
| 621 | // Look further up the prototype chain. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 622 | holder = %object_get_prototype_of(holder); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 623 | continue; |
| 624 | } |
| 625 | formatted_stack_trace = FormatStackTrace(holder, stack_trace); |
| 626 | SET_PRIVATE(holder, stackTraceSymbol, UNDEFINED); |
| 627 | SET_PRIVATE(holder, formattedStackTraceSymbol, formatted_stack_trace); |
| 628 | } |
| 629 | return formatted_stack_trace; |
| 630 | } |
| 631 | return UNDEFINED; |
| 632 | }; |
| 633 | |
| 634 | |
| 635 | // If the receiver equals the holder, set the formatted stack trace that the |
| 636 | // getter returns. |
| 637 | var StackTraceSetter = function(v) { |
| 638 | if (IsErrorObject(this)) { |
| 639 | SET_PRIVATE(this, stackTraceSymbol, UNDEFINED); |
| 640 | SET_PRIVATE(this, formattedStackTraceSymbol, v); |
| 641 | } |
| 642 | }; |
| 643 | |
| 644 | |
| 645 | // Use a dummy function since we do not actually want to capture a stack trace |
| 646 | // when constructing the initial Error prototytpes. |
| 647 | var captureStackTrace = function() {}; |
| 648 | |
| 649 | |
| 650 | // Set up special error type constructors. |
| 651 | function SetUpError(error_function) { |
| 652 | %FunctionSetInstanceClassName(error_function, 'Error'); |
| 653 | var name = error_function.name; |
| 654 | var prototype = new GlobalObject(); |
| 655 | if (name !== 'Error') { |
| 656 | %InternalSetPrototype(error_function, GlobalError); |
| 657 | %InternalSetPrototype(prototype, GlobalError.prototype); |
| 658 | } |
| 659 | %FunctionSetPrototype(error_function, prototype); |
| 660 | |
| 661 | %AddNamedProperty(error_function.prototype, 'name', name, DONT_ENUM); |
| 662 | %AddNamedProperty(error_function.prototype, 'message', '', DONT_ENUM); |
| 663 | %AddNamedProperty( |
| 664 | error_function.prototype, 'constructor', error_function, DONT_ENUM); |
| 665 | |
| 666 | %SetCode(error_function, function(m) { |
| 667 | if (IS_UNDEFINED(new.target)) return new error_function(m); |
| 668 | |
| 669 | try { captureStackTrace(this, error_function); } catch (e) { } |
| 670 | // Define all the expected properties directly on the error |
| 671 | // object. This avoids going through getters and setters defined |
| 672 | // on prototype objects. |
| 673 | if (!IS_UNDEFINED(m)) { |
| 674 | %AddNamedProperty(this, 'message', TO_STRING(m), DONT_ENUM); |
| 675 | } |
| 676 | }); |
| 677 | |
| 678 | %SetNativeFlag(error_function); |
| 679 | return error_function; |
| 680 | }; |
| 681 | |
| 682 | GlobalError = SetUpError(global.Error); |
| 683 | GlobalEvalError = SetUpError(global.EvalError); |
| 684 | GlobalRangeError = SetUpError(global.RangeError); |
| 685 | GlobalReferenceError = SetUpError(global.ReferenceError); |
| 686 | GlobalSyntaxError = SetUpError(global.SyntaxError); |
| 687 | GlobalTypeError = SetUpError(global.TypeError); |
| 688 | GlobalURIError = SetUpError(global.URIError); |
| 689 | |
| 690 | utils.InstallFunctions(GlobalError.prototype, DONT_ENUM, |
| 691 | ['toString', ErrorToString]); |
| 692 | |
| 693 | function ErrorToString() { |
| 694 | if (!IS_RECEIVER(this)) { |
| 695 | throw MakeTypeError(kCalledOnNonObject, "Error.prototype.toString"); |
| 696 | } |
| 697 | |
| 698 | var name = this.name; |
| 699 | name = IS_UNDEFINED(name) ? "Error" : TO_STRING(name); |
| 700 | |
| 701 | var message = this.message; |
| 702 | message = IS_UNDEFINED(message) ? "" : TO_STRING(message); |
| 703 | |
| 704 | if (name == "") return message; |
| 705 | if (message == "") return name; |
| 706 | return `${name}: ${message}` |
| 707 | } |
| 708 | |
| 709 | function MakeError(type, arg0, arg1, arg2) { |
| 710 | return MakeGenericError(GlobalError, type, arg0, arg1, arg2); |
| 711 | } |
| 712 | |
| 713 | function MakeRangeError(type, arg0, arg1, arg2) { |
| 714 | return MakeGenericError(GlobalRangeError, type, arg0, arg1, arg2); |
| 715 | } |
| 716 | |
| 717 | function MakeSyntaxError(type, arg0, arg1, arg2) { |
| 718 | return MakeGenericError(GlobalSyntaxError, type, arg0, arg1, arg2); |
| 719 | } |
| 720 | |
| 721 | function MakeTypeError(type, arg0, arg1, arg2) { |
| 722 | return MakeGenericError(GlobalTypeError, type, arg0, arg1, arg2); |
| 723 | } |
| 724 | |
| 725 | function MakeURIError() { |
| 726 | return MakeGenericError(GlobalURIError, kURIMalformed); |
| 727 | } |
| 728 | |
| 729 | // Boilerplate for exceptions for stack overflows. Used from |
| 730 | // Isolate::StackOverflow(). |
| 731 | var StackOverflowBoilerplate = MakeRangeError(kStackOverflow); |
| 732 | utils.InstallGetterSetter(StackOverflowBoilerplate, 'stack', |
| 733 | StackTraceGetter, StackTraceSetter) |
| 734 | |
| 735 | // Define actual captureStackTrace function after everything has been set up. |
| 736 | captureStackTrace = function captureStackTrace(obj, cons_opt) { |
| 737 | // Define accessors first, as this may fail and throw. |
Ben Murdoch | c561043 | 2016-08-08 18:44:38 +0100 | [diff] [blame] | 738 | %object_define_property(obj, 'stack', { get: StackTraceGetter, |
| 739 | set: StackTraceSetter, |
| 740 | configurable: true }); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame] | 741 | %CollectStackTrace(obj, cons_opt ? cons_opt : captureStackTrace); |
| 742 | }; |
| 743 | |
| 744 | GlobalError.captureStackTrace = captureStackTrace; |
| 745 | |
| 746 | %InstallToContext([ |
| 747 | "get_stack_trace_line_fun", GetStackTraceLine, |
| 748 | "make_error_function", MakeGenericError, |
| 749 | "make_range_error", MakeRangeError, |
| 750 | "make_type_error", MakeTypeError, |
| 751 | "message_get_column_number", GetColumnNumber, |
| 752 | "message_get_line_number", GetLineNumber, |
| 753 | "message_get_source_line", GetSourceLine, |
| 754 | "no_side_effects_to_string_fun", NoSideEffectsToString, |
| 755 | "stack_overflow_boilerplate", StackOverflowBoilerplate, |
| 756 | ]); |
| 757 | |
| 758 | utils.Export(function(to) { |
| 759 | to.ErrorToString = ErrorToString; |
| 760 | to.MakeError = MakeError; |
| 761 | to.MakeRangeError = MakeRangeError; |
| 762 | to.MakeSyntaxError = MakeSyntaxError; |
| 763 | to.MakeTypeError = MakeTypeError; |
| 764 | to.MakeURIError = MakeURIError; |
| 765 | }); |
| 766 | |
| 767 | }); |