| // Copyright 2012 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // ------------------------------------------------------------------- |
| |
| var $errorToString; |
| var $getStackTraceLine; |
| var $messageGetPositionInLine; |
| var $messageGetLineNumber; |
| var $messageGetSourceLine; |
| var $noSideEffectToString; |
| var $stackOverflowBoilerplate; |
| var $stackTraceSymbol; |
| var $toDetailString; |
| var $Error; |
| var $EvalError; |
| var $RangeError; |
| var $ReferenceError; |
| var $SyntaxError; |
| var $TypeError; |
| var $URIError; |
| var MakeError; |
| var MakeEvalError; |
| var MakeRangeError; |
| var MakeReferenceError; |
| var MakeSyntaxError; |
| var MakeTypeError; |
| var MakeURIError; |
| |
| (function(global, utils) { |
| |
| %CheckIsBootstrapping(); |
| |
| // ------------------------------------------------------------------- |
| // Imports |
| |
| var GlobalObject = global.Object; |
| var InternalArray = utils.InternalArray; |
| var ObjectDefineProperty = utils.ObjectDefineProperty; |
| |
| var ArrayJoin; |
| var ObjectToString; |
| var StringCharAt; |
| var StringIndexOf; |
| var StringSubstring; |
| |
| utils.Import(function(from) { |
| ArrayJoin = from.ArrayJoin; |
| ObjectToString = from.ObjectToString; |
| StringCharAt = from.StringCharAt; |
| StringIndexOf = from.StringIndexOf; |
| StringSubstring = from.StringSubstring; |
| }); |
| |
| // ------------------------------------------------------------------- |
| |
| var GlobalError; |
| var GlobalTypeError; |
| var GlobalRangeError; |
| var GlobalURIError; |
| var GlobalSyntaxError; |
| var GlobalReferenceError; |
| var GlobalEvalError; |
| |
| |
| function NoSideEffectsObjectToString() { |
| if (IS_UNDEFINED(this) && !IS_UNDETECTABLE(this)) return "[object Undefined]"; |
| if (IS_NULL(this)) return "[object Null]"; |
| return "[object " + %_ClassOf(TO_OBJECT_INLINE(this)) + "]"; |
| } |
| |
| |
| function NoSideEffectToString(obj) { |
| if (IS_STRING(obj)) return obj; |
| if (IS_NUMBER(obj)) return %_NumberToString(obj); |
| if (IS_BOOLEAN(obj)) return obj ? 'true' : 'false'; |
| if (IS_UNDEFINED(obj)) return 'undefined'; |
| if (IS_NULL(obj)) return 'null'; |
| if (IS_FUNCTION(obj)) { |
| var str = %_CallFunction(obj, obj, $functionSourceString); |
| if (str.length > 128) { |
| str = %_SubString(str, 0, 111) + "...<omitted>..." + |
| %_SubString(str, str.length - 2, str.length); |
| } |
| return str; |
| } |
| if (IS_SYMBOL(obj)) return %_CallFunction(obj, $symbolToString); |
| if (IS_OBJECT(obj) |
| && %GetDataProperty(obj, "toString") === ObjectToString) { |
| var constructor = %GetDataProperty(obj, "constructor"); |
| if (typeof constructor == "function") { |
| var constructorName = constructor.name; |
| if (IS_STRING(constructorName) && constructorName !== "") { |
| return "#<" + constructorName + ">"; |
| } |
| } |
| } |
| if (CanBeSafelyTreatedAsAnErrorObject(obj)) { |
| return %_CallFunction(obj, ErrorToString); |
| } |
| |
| return %_CallFunction(obj, NoSideEffectsObjectToString); |
| } |
| |
| // To determine whether we can safely stringify an object using ErrorToString |
| // without the risk of side-effects, we need to check whether the object is |
| // either an instance of a native error type (via '%_ClassOf'), or has Error |
| // in its prototype chain and hasn't overwritten 'toString' with something |
| // strange and unusual. |
| function CanBeSafelyTreatedAsAnErrorObject(obj) { |
| switch (%_ClassOf(obj)) { |
| case 'Error': |
| case 'EvalError': |
| case 'RangeError': |
| case 'ReferenceError': |
| case 'SyntaxError': |
| case 'TypeError': |
| case 'URIError': |
| return true; |
| } |
| |
| var objToString = %GetDataProperty(obj, "toString"); |
| return obj instanceof GlobalError && objToString === ErrorToString; |
| } |
| |
| |
| // When formatting internally created error messages, do not |
| // invoke overwritten error toString methods but explicitly use |
| // the error to string method. This is to avoid leaking error |
| // objects between script tags in a browser setting. |
| function ToStringCheckErrorObject(obj) { |
| if (CanBeSafelyTreatedAsAnErrorObject(obj)) { |
| return %_CallFunction(obj, ErrorToString); |
| } else { |
| return $toString(obj); |
| } |
| } |
| |
| |
| function ToDetailString(obj) { |
| if (obj != null && IS_OBJECT(obj) && obj.toString === ObjectToString) { |
| var constructor = obj.constructor; |
| if (typeof constructor == "function") { |
| var constructorName = constructor.name; |
| if (IS_STRING(constructorName) && constructorName !== "") { |
| return "#<" + constructorName + ">"; |
| } |
| } |
| } |
| return ToStringCheckErrorObject(obj); |
| } |
| |
| |
| function MakeGenericError(constructor, type, arg0, arg1, arg2) { |
| if (IS_UNDEFINED(arg0) && IS_STRING(type)) arg0 = []; |
| return new constructor(FormatMessage(type, arg0, arg1, arg2)); |
| } |
| |
| |
| /** |
| * Set up the Script function and constructor. |
| */ |
| %FunctionSetInstanceClassName(Script, 'Script'); |
| %AddNamedProperty(Script.prototype, 'constructor', Script, |
| DONT_ENUM | DONT_DELETE | READ_ONLY); |
| %SetCode(Script, function(x) { |
| // Script objects can only be created by the VM. |
| throw MakeError(kUnsupported); |
| }); |
| |
| |
| // Helper functions; called from the runtime system. |
| function FormatMessage(type, arg0, arg1, arg2) { |
| var arg0 = NoSideEffectToString(arg0); |
| var arg1 = NoSideEffectToString(arg1); |
| var arg2 = NoSideEffectToString(arg2); |
| try { |
| return %FormatMessageString(type, arg0, arg1, arg2); |
| } catch (e) { |
| return "<error>"; |
| } |
| } |
| |
| |
| function GetLineNumber(message) { |
| var start_position = %MessageGetStartPosition(message); |
| if (start_position == -1) return kNoLineNumberInfo; |
| var script = %MessageGetScript(message); |
| var location = script.locationFromPosition(start_position, true); |
| if (location == null) return kNoLineNumberInfo; |
| return location.line + 1; |
| } |
| |
| |
| // Returns the source code line containing the given source |
| // position, or the empty string if the position is invalid. |
| function GetSourceLine(message) { |
| var script = %MessageGetScript(message); |
| var start_position = %MessageGetStartPosition(message); |
| var location = script.locationFromPosition(start_position, true); |
| if (location == null) return ""; |
| return location.sourceText(); |
| } |
| |
| /** |
| * Find a line number given a specific source position. |
| * @param {number} position The source position. |
| * @return {number} 0 if input too small, -1 if input too large, |
| else the line number. |
| */ |
| function ScriptLineFromPosition(position) { |
| var lower = 0; |
| var upper = this.lineCount() - 1; |
| var line_ends = this.line_ends; |
| |
| // We'll never find invalid positions so bail right away. |
| if (position > line_ends[upper]) { |
| return -1; |
| } |
| |
| // This means we don't have to safe-guard indexing line_ends[i - 1]. |
| if (position <= line_ends[0]) { |
| return 0; |
| } |
| |
| // Binary search to find line # from position range. |
| while (upper >= 1) { |
| var i = (lower + upper) >> 1; |
| |
| if (position > line_ends[i]) { |
| lower = i + 1; |
| } else if (position <= line_ends[i - 1]) { |
| upper = i - 1; |
| } else { |
| return i; |
| } |
| } |
| |
| return -1; |
| } |
| |
| /** |
| * Get information on a specific source position. |
| * @param {number} position The source position |
| * @param {boolean} include_resource_offset Set to true to have the resource |
| * offset added to the location |
| * @return {SourceLocation} |
| * If line is negative or not in the source null is returned. |
| */ |
| function ScriptLocationFromPosition(position, |
| include_resource_offset) { |
| var line = this.lineFromPosition(position); |
| if (line == -1) return null; |
| |
| // Determine start, end and column. |
| var line_ends = this.line_ends; |
| var start = line == 0 ? 0 : line_ends[line - 1] + 1; |
| var end = line_ends[line]; |
| if (end > 0 && %_CallFunction(this.source, end - 1, StringCharAt) == '\r') { |
| end--; |
| } |
| var column = position - start; |
| |
| // Adjust according to the offset within the resource. |
| if (include_resource_offset) { |
| line += this.line_offset; |
| if (line == this.line_offset) { |
| column += this.column_offset; |
| } |
| } |
| |
| return new SourceLocation(this, position, line, column, start, end); |
| } |
| |
| |
| /** |
| * Get information on a specific source line and column possibly offset by a |
| * fixed source position. This function is used to find a source position from |
| * a line and column position. The fixed source position offset is typically |
| * used to find a source position in a function based on a line and column in |
| * the source for the function alone. The offset passed will then be the |
| * start position of the source for the function within the full script source. |
| * @param {number} opt_line The line within the source. Default value is 0 |
| * @param {number} opt_column The column in within the line. Default value is 0 |
| * @param {number} opt_offset_position The offset from the begining of the |
| * source from where the line and column calculation starts. |
| * Default value is 0 |
| * @return {SourceLocation} |
| * If line is negative or not in the source null is returned. |
| */ |
| function ScriptLocationFromLine(opt_line, opt_column, opt_offset_position) { |
| // Default is the first line in the script. Lines in the script is relative |
| // to the offset within the resource. |
| var line = 0; |
| if (!IS_UNDEFINED(opt_line)) { |
| line = opt_line - this.line_offset; |
| } |
| |
| // Default is first column. If on the first line add the offset within the |
| // resource. |
| var column = opt_column || 0; |
| if (line == 0) { |
| column -= this.column_offset; |
| } |
| |
| var offset_position = opt_offset_position || 0; |
| if (line < 0 || column < 0 || offset_position < 0) return null; |
| if (line == 0) { |
| return this.locationFromPosition(offset_position + column, false); |
| } else { |
| // Find the line where the offset position is located. |
| var offset_line = this.lineFromPosition(offset_position); |
| |
| if (offset_line == -1 || offset_line + line >= this.lineCount()) { |
| return null; |
| } |
| |
| return this.locationFromPosition( |
| this.line_ends[offset_line + line - 1] + 1 + column); // line > 0 here. |
| } |
| } |
| |
| |
| /** |
| * Get a slice of source code from the script. The boundaries for the slice is |
| * specified in lines. |
| * @param {number} opt_from_line The first line (zero bound) in the slice. |
| * Default is 0 |
| * @param {number} opt_to_column The last line (zero bound) in the slice (non |
| * inclusive). Default is the number of lines in the script |
| * @return {SourceSlice} The source slice or null of the parameters where |
| * invalid |
| */ |
| function ScriptSourceSlice(opt_from_line, opt_to_line) { |
| var from_line = IS_UNDEFINED(opt_from_line) ? this.line_offset |
| : opt_from_line; |
| var to_line = IS_UNDEFINED(opt_to_line) ? this.line_offset + this.lineCount() |
| : opt_to_line; |
| |
| // Adjust according to the offset within the resource. |
| from_line -= this.line_offset; |
| to_line -= this.line_offset; |
| if (from_line < 0) from_line = 0; |
| if (to_line > this.lineCount()) to_line = this.lineCount(); |
| |
| // Check parameters. |
| if (from_line >= this.lineCount() || |
| to_line < 0 || |
| from_line > to_line) { |
| return null; |
| } |
| |
| var line_ends = this.line_ends; |
| var from_position = from_line == 0 ? 0 : line_ends[from_line - 1] + 1; |
| var to_position = to_line == 0 ? 0 : line_ends[to_line - 1] + 1; |
| |
| // Return a source slice with line numbers re-adjusted to the resource. |
| return new SourceSlice(this, |
| from_line + this.line_offset, |
| to_line + this.line_offset, |
| from_position, to_position); |
| } |
| |
| |
| function ScriptSourceLine(opt_line) { |
| // Default is the first line in the script. Lines in the script are relative |
| // to the offset within the resource. |
| var line = 0; |
| if (!IS_UNDEFINED(opt_line)) { |
| line = opt_line - this.line_offset; |
| } |
| |
| // Check parameter. |
| if (line < 0 || this.lineCount() <= line) { |
| return null; |
| } |
| |
| // Return the source line. |
| var line_ends = this.line_ends; |
| var start = line == 0 ? 0 : line_ends[line - 1] + 1; |
| var end = line_ends[line]; |
| return %_CallFunction(this.source, start, end, StringSubstring); |
| } |
| |
| |
| /** |
| * Returns the number of source lines. |
| * @return {number} |
| * Number of source lines. |
| */ |
| function ScriptLineCount() { |
| // Return number of source lines. |
| return this.line_ends.length; |
| } |
| |
| |
| /** |
| * If sourceURL comment is available returns sourceURL comment contents. |
| * Otherwise, script name is returned. See |
| * http://fbug.googlecode.com/svn/branches/firebug1.1/docs/ReleaseNotes_1.1.txt |
| * and Source Map Revision 3 proposal for details on using //# sourceURL and |
| * deprecated //@ sourceURL comment to identify scripts that don't have name. |
| * |
| * @return {?string} script name if present, value for //# sourceURL or |
| * deprecated //@ sourceURL comment otherwise. |
| */ |
| function ScriptNameOrSourceURL() { |
| if (this.source_url) return this.source_url; |
| return this.name; |
| } |
| |
| |
| utils.SetUpLockedPrototype(Script, [ |
| "source", |
| "name", |
| "source_url", |
| "source_mapping_url", |
| "line_ends", |
| "line_offset", |
| "column_offset" |
| ], [ |
| "lineFromPosition", ScriptLineFromPosition, |
| "locationFromPosition", ScriptLocationFromPosition, |
| "locationFromLine", ScriptLocationFromLine, |
| "sourceSlice", ScriptSourceSlice, |
| "sourceLine", ScriptSourceLine, |
| "lineCount", ScriptLineCount, |
| "nameOrSourceURL", ScriptNameOrSourceURL |
| ] |
| ); |
| |
| |
| /** |
| * Class for source location. A source location is a position within some |
| * source with the following properties: |
| * script : script object for the source |
| * line : source line number |
| * column : source column within the line |
| * position : position within the source |
| * start : position of start of source context (inclusive) |
| * end : position of end of source context (not inclusive) |
| * Source text for the source context is the character interval |
| * [start, end[. In most cases end will point to a newline character. |
| * It might point just past the final position of the source if the last |
| * source line does not end with a newline character. |
| * @param {Script} script The Script object for which this is a location |
| * @param {number} position Source position for the location |
| * @param {number} line The line number for the location |
| * @param {number} column The column within the line for the location |
| * @param {number} start Source position for start of source context |
| * @param {number} end Source position for end of source context |
| * @constructor |
| */ |
| function SourceLocation(script, position, line, column, start, end) { |
| this.script = script; |
| this.position = position; |
| this.line = line; |
| this.column = column; |
| this.start = start; |
| this.end = end; |
| } |
| |
| |
| /** |
| * Get the source text for a SourceLocation |
| * @return {String} |
| * Source text for this location. |
| */ |
| function SourceLocationSourceText() { |
| return %_CallFunction(this.script.source, |
| this.start, |
| this.end, |
| StringSubstring); |
| } |
| |
| |
| utils.SetUpLockedPrototype(SourceLocation, |
| ["script", "position", "line", "column", "start", "end"], |
| ["sourceText", SourceLocationSourceText] |
| ); |
| |
| |
| /** |
| * Class for a source slice. A source slice is a part of a script source with |
| * the following properties: |
| * script : script object for the source |
| * from_line : line number for the first line in the slice |
| * to_line : source line number for the last line in the slice |
| * from_position : position of the first character in the slice |
| * to_position : position of the last character in the slice |
| * The to_line and to_position are not included in the slice, that is the lines |
| * in the slice are [from_line, to_line[. Likewise the characters in the slice |
| * are [from_position, to_position[. |
| * @param {Script} script The Script object for the source slice |
| * @param {number} from_line |
| * @param {number} to_line |
| * @param {number} from_position |
| * @param {number} to_position |
| * @constructor |
| */ |
| function SourceSlice(script, from_line, to_line, from_position, to_position) { |
| this.script = script; |
| this.from_line = from_line; |
| this.to_line = to_line; |
| this.from_position = from_position; |
| this.to_position = to_position; |
| } |
| |
| /** |
| * Get the source text for a SourceSlice |
| * @return {String} Source text for this slice. The last line will include |
| * the line terminating characters (if any) |
| */ |
| function SourceSliceSourceText() { |
| return %_CallFunction(this.script.source, |
| this.from_position, |
| this.to_position, |
| StringSubstring); |
| } |
| |
| utils.SetUpLockedPrototype(SourceSlice, |
| ["script", "from_line", "to_line", "from_position", "to_position"], |
| ["sourceText", SourceSliceSourceText] |
| ); |
| |
| |
| // Returns the offset of the given position within the containing |
| // line. |
| function GetPositionInLine(message) { |
| var script = %MessageGetScript(message); |
| var start_position = %MessageGetStartPosition(message); |
| var location = script.locationFromPosition(start_position, false); |
| if (location == null) return -1; |
| return start_position - location.start; |
| } |
| |
| |
| function GetStackTraceLine(recv, fun, pos, isGlobal) { |
| return new CallSite(recv, fun, pos, false).toString(); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Error implementation |
| |
| var CallSiteReceiverKey = NEW_PRIVATE("CallSite#receiver"); |
| var CallSiteFunctionKey = NEW_PRIVATE("CallSite#function"); |
| var CallSitePositionKey = NEW_PRIVATE("CallSite#position"); |
| var CallSiteStrictModeKey = NEW_PRIVATE("CallSite#strict_mode"); |
| |
| function CallSite(receiver, fun, pos, strict_mode) { |
| SET_PRIVATE(this, CallSiteReceiverKey, receiver); |
| SET_PRIVATE(this, CallSiteFunctionKey, fun); |
| SET_PRIVATE(this, CallSitePositionKey, pos); |
| SET_PRIVATE(this, CallSiteStrictModeKey, strict_mode); |
| } |
| |
| function CallSiteGetThis() { |
| return GET_PRIVATE(this, CallSiteStrictModeKey) |
| ? UNDEFINED : GET_PRIVATE(this, CallSiteReceiverKey); |
| } |
| |
| function CallSiteGetFunction() { |
| return GET_PRIVATE(this, CallSiteStrictModeKey) |
| ? UNDEFINED : GET_PRIVATE(this, CallSiteFunctionKey); |
| } |
| |
| function CallSiteGetPosition() { |
| return GET_PRIVATE(this, CallSitePositionKey); |
| } |
| |
| function CallSiteGetTypeName() { |
| return GetTypeName(GET_PRIVATE(this, CallSiteReceiverKey), false); |
| } |
| |
| function CallSiteIsToplevel() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteIsToplevelRT(receiver, fun, pos); |
| } |
| |
| function CallSiteIsEval() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteIsEvalRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetEvalOrigin() { |
| var script = %FunctionGetScript(GET_PRIVATE(this, CallSiteFunctionKey)); |
| return FormatEvalOrigin(script); |
| } |
| |
| function CallSiteGetScriptNameOrSourceURL() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetScriptNameOrSourceUrlRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetFunctionName() { |
| // See if the function knows its own name |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetFunctionNameRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetMethodName() { |
| // See if we can find a unique property on the receiver that holds |
| // this function. |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetMethodNameRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetFileName() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetFileNameRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetLineNumber() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetLineNumberRT(receiver, fun, pos); |
| } |
| |
| function CallSiteGetColumnNumber() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteGetColumnNumberRT(receiver, fun, pos); |
| } |
| |
| function CallSiteIsNative() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteIsNativeRT(receiver, fun, pos); |
| } |
| |
| function CallSiteIsConstructor() { |
| var receiver = GET_PRIVATE(this, CallSiteReceiverKey); |
| var fun = GET_PRIVATE(this, CallSiteFunctionKey); |
| var pos = GET_PRIVATE(this, CallSitePositionKey); |
| return %CallSiteIsConstructorRT(receiver, fun, pos); |
| } |
| |
| function CallSiteToString() { |
| var fileName; |
| var fileLocation = ""; |
| if (this.isNative()) { |
| fileLocation = "native"; |
| } else { |
| fileName = this.getScriptNameOrSourceURL(); |
| if (!fileName && this.isEval()) { |
| fileLocation = this.getEvalOrigin(); |
| fileLocation += ", "; // Expecting source position to follow. |
| } |
| |
| if (fileName) { |
| fileLocation += fileName; |
| } else { |
| // Source code does not originate from a file and is not native, but we |
| // can still get the source position inside the source string, e.g. in |
| // an eval string. |
| fileLocation += "<anonymous>"; |
| } |
| var lineNumber = this.getLineNumber(); |
| if (lineNumber != null) { |
| fileLocation += ":" + lineNumber; |
| var columnNumber = this.getColumnNumber(); |
| if (columnNumber) { |
| fileLocation += ":" + columnNumber; |
| } |
| } |
| } |
| |
| var line = ""; |
| var functionName = this.getFunctionName(); |
| var addSuffix = true; |
| var isConstructor = this.isConstructor(); |
| var isMethodCall = !(this.isToplevel() || isConstructor); |
| if (isMethodCall) { |
| var typeName = GetTypeName(GET_PRIVATE(this, CallSiteReceiverKey), true); |
| var methodName = this.getMethodName(); |
| if (functionName) { |
| if (typeName && |
| %_CallFunction(functionName, typeName, StringIndexOf) != 0) { |
| line += typeName + "."; |
| } |
| line += functionName; |
| if (methodName && |
| (%_CallFunction(functionName, "." + methodName, StringIndexOf) != |
| functionName.length - methodName.length - 1)) { |
| line += " [as " + methodName + "]"; |
| } |
| } else { |
| line += typeName + "." + (methodName || "<anonymous>"); |
| } |
| } else if (isConstructor) { |
| line += "new " + (functionName || "<anonymous>"); |
| } else if (functionName) { |
| line += functionName; |
| } else { |
| line += fileLocation; |
| addSuffix = false; |
| } |
| if (addSuffix) { |
| line += " (" + fileLocation + ")"; |
| } |
| return line; |
| } |
| |
| utils.SetUpLockedPrototype(CallSite, ["receiver", "fun", "pos"], [ |
| "getThis", CallSiteGetThis, |
| "getTypeName", CallSiteGetTypeName, |
| "isToplevel", CallSiteIsToplevel, |
| "isEval", CallSiteIsEval, |
| "getEvalOrigin", CallSiteGetEvalOrigin, |
| "getScriptNameOrSourceURL", CallSiteGetScriptNameOrSourceURL, |
| "getFunction", CallSiteGetFunction, |
| "getFunctionName", CallSiteGetFunctionName, |
| "getMethodName", CallSiteGetMethodName, |
| "getFileName", CallSiteGetFileName, |
| "getLineNumber", CallSiteGetLineNumber, |
| "getColumnNumber", CallSiteGetColumnNumber, |
| "isNative", CallSiteIsNative, |
| "getPosition", CallSiteGetPosition, |
| "isConstructor", CallSiteIsConstructor, |
| "toString", CallSiteToString |
| ]); |
| |
| |
| function FormatEvalOrigin(script) { |
| var sourceURL = script.nameOrSourceURL(); |
| if (sourceURL) { |
| return sourceURL; |
| } |
| |
| var eval_origin = "eval at "; |
| if (script.eval_from_function_name) { |
| eval_origin += script.eval_from_function_name; |
| } else { |
| eval_origin += "<anonymous>"; |
| } |
| |
| var eval_from_script = script.eval_from_script; |
| if (eval_from_script) { |
| if (eval_from_script.compilation_type == COMPILATION_TYPE_EVAL) { |
| // eval script originated from another eval. |
| eval_origin += " (" + FormatEvalOrigin(eval_from_script) + ")"; |
| } else { |
| // eval script originated from "real" source. |
| if (eval_from_script.name) { |
| eval_origin += " (" + eval_from_script.name; |
| var location = eval_from_script.locationFromPosition( |
| script.eval_from_script_position, true); |
| if (location) { |
| eval_origin += ":" + (location.line + 1); |
| eval_origin += ":" + (location.column + 1); |
| } |
| eval_origin += ")"; |
| } else { |
| eval_origin += " (unknown source)"; |
| } |
| } |
| } |
| |
| return eval_origin; |
| } |
| |
| |
| function FormatErrorString(error) { |
| try { |
| return %_CallFunction(error, ErrorToString); |
| } catch (e) { |
| try { |
| return "<error: " + e + ">"; |
| } catch (ee) { |
| return "<error>"; |
| } |
| } |
| } |
| |
| |
| function GetStackFrames(raw_stack) { |
| var frames = new InternalArray(); |
| var sloppy_frames = raw_stack[0]; |
| for (var i = 1; i < raw_stack.length; i += 4) { |
| var recv = raw_stack[i]; |
| var fun = raw_stack[i + 1]; |
| var code = raw_stack[i + 2]; |
| var pc = raw_stack[i + 3]; |
| var pos = %_IsSmi(code) ? code : %FunctionGetPositionForOffset(code, pc); |
| sloppy_frames--; |
| frames.push(new CallSite(recv, fun, pos, (sloppy_frames < 0))); |
| } |
| return frames; |
| } |
| |
| |
| // Flag to prevent recursive call of Error.prepareStackTrace. |
| var formatting_custom_stack_trace = false; |
| |
| |
| function FormatStackTrace(obj, raw_stack) { |
| var frames = GetStackFrames(raw_stack); |
| if (IS_FUNCTION(GlobalError.prepareStackTrace) && |
| !formatting_custom_stack_trace) { |
| var array = []; |
| %MoveArrayContents(frames, array); |
| formatting_custom_stack_trace = true; |
| var stack_trace = UNDEFINED; |
| try { |
| stack_trace = GlobalError.prepareStackTrace(obj, array); |
| } catch (e) { |
| throw e; // The custom formatting function threw. Rethrow. |
| } finally { |
| formatting_custom_stack_trace = false; |
| } |
| return stack_trace; |
| } |
| |
| var lines = new InternalArray(); |
| lines.push(FormatErrorString(obj)); |
| for (var i = 0; i < frames.length; i++) { |
| var frame = frames[i]; |
| var line; |
| try { |
| line = frame.toString(); |
| } catch (e) { |
| try { |
| line = "<error: " + e + ">"; |
| } catch (ee) { |
| // Any code that reaches this point is seriously nasty! |
| line = "<error>"; |
| } |
| } |
| lines.push(" at " + line); |
| } |
| return %_CallFunction(lines, "\n", ArrayJoin); |
| } |
| |
| |
| function GetTypeName(receiver, requireConstructor) { |
| if (IS_NULL_OR_UNDEFINED(receiver)) return null; |
| var constructor = receiver.constructor; |
| if (!constructor) { |
| return requireConstructor ? null : |
| %_CallFunction(receiver, NoSideEffectsObjectToString); |
| } |
| var constructorName = constructor.name; |
| if (!constructorName) { |
| return requireConstructor ? null : |
| %_CallFunction(receiver, NoSideEffectsObjectToString); |
| } |
| return constructorName; |
| } |
| |
| var formatted_stack_trace_symbol = NEW_PRIVATE("formatted stack trace"); |
| |
| |
| // Format the stack trace if not yet done, and return it. |
| // Cache the formatted stack trace on the holder. |
| var StackTraceGetter = function() { |
| var formatted_stack_trace = UNDEFINED; |
| var holder = this; |
| while (holder) { |
| var formatted_stack_trace = |
| GET_PRIVATE(holder, formatted_stack_trace_symbol); |
| if (IS_UNDEFINED(formatted_stack_trace)) { |
| // No formatted stack trace available. |
| var stack_trace = GET_PRIVATE(holder, $stackTraceSymbol); |
| if (IS_UNDEFINED(stack_trace)) { |
| // Neither formatted nor structured stack trace available. |
| // Look further up the prototype chain. |
| holder = %_GetPrototype(holder); |
| continue; |
| } |
| formatted_stack_trace = FormatStackTrace(holder, stack_trace); |
| SET_PRIVATE(holder, $stackTraceSymbol, UNDEFINED); |
| SET_PRIVATE(holder, formatted_stack_trace_symbol, formatted_stack_trace); |
| } |
| return formatted_stack_trace; |
| } |
| return UNDEFINED; |
| }; |
| |
| |
| // If the receiver equals the holder, set the formatted stack trace that the |
| // getter returns. |
| var StackTraceSetter = function(v) { |
| if (HAS_PRIVATE(this, $stackTraceSymbol)) { |
| SET_PRIVATE(this, $stackTraceSymbol, UNDEFINED); |
| SET_PRIVATE(this, formatted_stack_trace_symbol, v); |
| } |
| }; |
| |
| |
| // Use a dummy function since we do not actually want to capture a stack trace |
| // when constructing the initial Error prototytpes. |
| var captureStackTrace = function() {}; |
| |
| |
| // Define special error type constructors. |
| function DefineError(global, f) { |
| // Store the error function in both the global object |
| // and the runtime object. The function is fetched |
| // from the runtime object when throwing errors from |
| // within the runtime system to avoid strange side |
| // effects when overwriting the error functions from |
| // user code. |
| var name = f.name; |
| %AddNamedProperty(global, name, f, DONT_ENUM); |
| // Configure the error function. |
| if (name == 'Error') { |
| // The prototype of the Error object must itself be an error. |
| // However, it can't be an instance of the Error object because |
| // it hasn't been properly configured yet. Instead we create a |
| // special not-a-true-error-but-close-enough object. |
| var ErrorPrototype = function() {}; |
| %FunctionSetPrototype(ErrorPrototype, GlobalObject.prototype); |
| %FunctionSetInstanceClassName(ErrorPrototype, 'Error'); |
| %FunctionSetPrototype(f, new ErrorPrototype()); |
| } else { |
| %FunctionSetPrototype(f, new GlobalError()); |
| %InternalSetPrototype(f, GlobalError); |
| } |
| %FunctionSetInstanceClassName(f, 'Error'); |
| %AddNamedProperty(f.prototype, 'constructor', f, DONT_ENUM); |
| %AddNamedProperty(f.prototype, 'name', name, DONT_ENUM); |
| %SetCode(f, function(m) { |
| if (%_IsConstructCall()) { |
| try { captureStackTrace(this, f); } catch (e) { } |
| // Define all the expected properties directly on the error |
| // object. This avoids going through getters and setters defined |
| // on prototype objects. |
| if (!IS_UNDEFINED(m)) { |
| %AddNamedProperty(this, 'message', $toString(m), DONT_ENUM); |
| } |
| } else { |
| return new f(m); |
| } |
| }); |
| %SetNativeFlag(f); |
| return f; |
| }; |
| |
| GlobalError = DefineError(global, function Error() { }); |
| GlobalEvalError = DefineError(global, function EvalError() { }); |
| GlobalRangeError = DefineError(global, function RangeError() { }); |
| GlobalReferenceError = DefineError(global, function ReferenceError() { }); |
| GlobalSyntaxError = DefineError(global, function SyntaxError() { }); |
| GlobalTypeError = DefineError(global, function TypeError() { }); |
| GlobalURIError = DefineError(global, function URIError() { }); |
| |
| %AddNamedProperty(GlobalError.prototype, 'message', '', DONT_ENUM); |
| |
| // Global list of error objects visited during ErrorToString. This is |
| // used to detect cycles in error toString formatting. |
| var visited_errors = new InternalArray(); |
| var cyclic_error_marker = new GlobalObject(); |
| |
| function GetPropertyWithoutInvokingMonkeyGetters(error, name) { |
| var current = error; |
| // Climb the prototype chain until we find the holder. |
| while (current && !%HasOwnProperty(current, name)) { |
| current = %_GetPrototype(current); |
| } |
| if (IS_NULL(current)) return UNDEFINED; |
| if (!IS_OBJECT(current)) return error[name]; |
| // If the property is an accessor on one of the predefined errors that can be |
| // generated statically by the compiler, don't touch it. This is to address |
| // http://code.google.com/p/chromium/issues/detail?id=69187 |
| var desc = %GetOwnProperty(current, name); |
| if (desc && desc[IS_ACCESSOR_INDEX]) { |
| var isName = name === "name"; |
| if (current === GlobalReferenceError.prototype) |
| return isName ? "ReferenceError" : UNDEFINED; |
| if (current === GlobalSyntaxError.prototype) |
| return isName ? "SyntaxError" : UNDEFINED; |
| if (current === GlobalTypeError.prototype) |
| return isName ? "TypeError" : UNDEFINED; |
| } |
| // Otherwise, read normally. |
| return error[name]; |
| } |
| |
| function ErrorToStringDetectCycle(error) { |
| if (!%PushIfAbsent(visited_errors, error)) throw cyclic_error_marker; |
| try { |
| var name = GetPropertyWithoutInvokingMonkeyGetters(error, "name"); |
| name = IS_UNDEFINED(name) ? "Error" : TO_STRING_INLINE(name); |
| var message = GetPropertyWithoutInvokingMonkeyGetters(error, "message"); |
| message = IS_UNDEFINED(message) ? "" : TO_STRING_INLINE(message); |
| if (name === "") return message; |
| if (message === "") return name; |
| return name + ": " + message; |
| } finally { |
| visited_errors.length = visited_errors.length - 1; |
| } |
| } |
| |
| function ErrorToString() { |
| if (!IS_SPEC_OBJECT(this)) { |
| throw MakeTypeError(kCalledOnNonObject, "Error.prototype.toString"); |
| } |
| |
| try { |
| return ErrorToStringDetectCycle(this); |
| } catch(e) { |
| // If this error message was encountered already return the empty |
| // string for it instead of recursively formatting it. |
| if (e === cyclic_error_marker) { |
| return ''; |
| } |
| throw e; |
| } |
| } |
| |
| utils.InstallFunctions(GlobalError.prototype, DONT_ENUM, |
| ['toString', ErrorToString]); |
| |
| $errorToString = ErrorToString; |
| $getStackTraceLine = GetStackTraceLine; |
| $messageGetPositionInLine = GetPositionInLine; |
| $messageGetLineNumber = GetLineNumber; |
| $messageGetSourceLine = GetSourceLine; |
| $noSideEffectToString = NoSideEffectToString; |
| $toDetailString = ToDetailString; |
| |
| $Error = GlobalError; |
| $EvalError = GlobalEvalError; |
| $RangeError = GlobalRangeError; |
| $ReferenceError = GlobalReferenceError; |
| $SyntaxError = GlobalSyntaxError; |
| $TypeError = GlobalTypeError; |
| $URIError = GlobalURIError; |
| |
| MakeError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalError, type, arg0, arg1, arg2); |
| } |
| |
| MakeEvalError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalEvalError, type, arg0, arg1, arg2); |
| } |
| |
| MakeRangeError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalRangeError, type, arg0, arg1, arg2); |
| } |
| |
| MakeReferenceError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalReferenceError, type, arg0, arg1, arg2); |
| } |
| |
| MakeSyntaxError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalSyntaxError, type, arg0, arg1, arg2); |
| } |
| |
| MakeTypeError = function(type, arg0, arg1, arg2) { |
| return MakeGenericError(GlobalTypeError, type, arg0, arg1, arg2); |
| } |
| |
| MakeURIError = function() { |
| return MakeGenericError(GlobalURIError, kURIMalformed); |
| } |
| |
| // Boilerplate for exceptions for stack overflows. Used from |
| // Isolate::StackOverflow(). |
| $stackOverflowBoilerplate = MakeRangeError(kStackOverflow); |
| %DefineAccessorPropertyUnchecked($stackOverflowBoilerplate, 'stack', |
| StackTraceGetter, StackTraceSetter, |
| DONT_ENUM); |
| |
| // Define actual captureStackTrace function after everything has been set up. |
| captureStackTrace = function captureStackTrace(obj, cons_opt) { |
| // Define accessors first, as this may fail and throw. |
| ObjectDefineProperty(obj, 'stack', { get: StackTraceGetter, |
| set: StackTraceSetter, |
| configurable: true }); |
| %CollectStackTrace(obj, cons_opt ? cons_opt : captureStackTrace); |
| }; |
| |
| GlobalError.captureStackTrace = captureStackTrace; |
| |
| }); |