| // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| |
| // ------------------------------------------------------------------- |
| |
| // Lazily initialized. |
| var kVowelSounds = 0; |
| var kCapitalVowelSounds = 0; |
| |
| |
| function GetInstanceName(cons) { |
| if (cons.length == 0) { |
| return ""; |
| } |
| var first = %StringToLowerCase(StringCharAt.call(cons, 0)); |
| if (kVowelSounds === 0) { |
| kVowelSounds = {a: true, e: true, i: true, o: true, u: true, y: true}; |
| kCapitalVowelSounds = {a: true, e: true, i: true, o: true, u: true, h: true, |
| f: true, l: true, m: true, n: true, r: true, s: true, x: true, y: true}; |
| } |
| var vowel_mapping = kVowelSounds; |
| if (cons.length > 1 && (StringCharAt.call(cons, 0) != first)) { |
| // First char is upper case |
| var second = %StringToLowerCase(StringCharAt.call(cons, 1)); |
| // Second char is upper case |
| if (StringCharAt.call(cons, 1) != second) { |
| vowel_mapping = kCapitalVowelSounds; |
| } |
| } |
| var s = vowel_mapping[first] ? "an " : "a "; |
| return s + cons; |
| } |
| |
| |
| var kMessages = 0; |
| |
| |
| function FormatString(format, args) { |
| var result = format; |
| for (var i = 0; i < args.length; i++) { |
| var str; |
| try { str = ToDetailString(args[i]); } |
| catch (e) { str = "#<error>"; } |
| result = ArrayJoin.call(StringSplit.call(result, "%" + i), str); |
| } |
| return result; |
| } |
| |
| |
| function ToDetailString(obj) { |
| if (obj != null && IS_OBJECT(obj) && obj.toString === $Object.prototype.toString) { |
| var constructor = obj.constructor; |
| if (!constructor) return ToString(obj); |
| var constructorName = constructor.name; |
| if (!constructorName) return ToString(obj); |
| return "#<" + GetInstanceName(constructorName) + ">"; |
| } else { |
| return ToString(obj); |
| } |
| } |
| |
| |
| function MakeGenericError(constructor, type, args) { |
| if (IS_UNDEFINED(args)) { |
| args = []; |
| } |
| var e = new constructor(kAddMessageAccessorsMarker); |
| e.type = type; |
| e.arguments = args; |
| return e; |
| } |
| |
| |
| /** |
| * Setup the Script function and constructor. |
| */ |
| %FunctionSetInstanceClassName(Script, 'Script'); |
| %SetProperty(Script.prototype, 'constructor', Script, DONT_ENUM); |
| %SetCode(Script, function(x) { |
| // Script objects can only be created by the VM. |
| throw new $Error("Not supported"); |
| }); |
| |
| |
| // Helper functions; called from the runtime system. |
| function FormatMessage(message) { |
| if (kMessages === 0) { |
| kMessages = { |
| // Error |
| cyclic_proto: "Cyclic __proto__ value", |
| // TypeError |
| unexpected_token: "Unexpected token %0", |
| unexpected_token_number: "Unexpected number", |
| unexpected_token_string: "Unexpected string", |
| unexpected_token_identifier: "Unexpected identifier", |
| unexpected_eos: "Unexpected end of input", |
| malformed_regexp: "Invalid regular expression: /%0/: %1", |
| unterminated_regexp: "Invalid regular expression: missing /", |
| regexp_flags: "Cannot supply flags when constructing one RegExp from another", |
| invalid_lhs_in_assignment: "Invalid left-hand side in assignment", |
| invalid_lhs_in_for_in: "Invalid left-hand side in for-in", |
| invalid_lhs_in_postfix_op: "Invalid left-hand side expression in postfix operation", |
| invalid_lhs_in_prefix_op: "Invalid left-hand side expression in prefix operation", |
| multiple_defaults_in_switch: "More than one default clause in switch statement", |
| newline_after_throw: "Illegal newline after throw", |
| redeclaration: "%0 '%1' has already been declared", |
| no_catch_or_finally: "Missing catch or finally after try", |
| unknown_label: "Undefined label '%0'", |
| uncaught_exception: "Uncaught %0", |
| stack_trace: "Stack Trace:\n%0", |
| called_non_callable: "%0 is not a function", |
| undefined_method: "Object %1 has no method '%0'", |
| property_not_function: "Property '%0' of object %1 is not a function", |
| cannot_convert_to_primitive: "Cannot convert object to primitive value", |
| not_constructor: "%0 is not a constructor", |
| not_defined: "%0 is not defined", |
| non_object_property_load: "Cannot read property '%0' of %1", |
| non_object_property_store: "Cannot set property '%0' of %1", |
| non_object_property_call: "Cannot call method '%0' of %1", |
| with_expression: "%0 has no properties", |
| illegal_invocation: "Illegal invocation", |
| no_setter_in_callback: "Cannot set property %0 of %1 which has only a getter", |
| apply_non_function: "Function.prototype.apply was called on %0, which is a %1 and not a function", |
| apply_wrong_args: "Function.prototype.apply: Arguments list has wrong type", |
| invalid_in_operator_use: "Cannot use 'in' operator to search for '%0' in %1", |
| instanceof_function_expected: "Expecting a function in instanceof check, but got %0", |
| instanceof_nonobject_proto: "Function has non-object prototype '%0' in instanceof check", |
| null_to_object: "Cannot convert null to object", |
| reduce_no_initial: "Reduce of empty array with no initial value", |
| // RangeError |
| invalid_array_length: "Invalid array length", |
| stack_overflow: "Maximum call stack size exceeded", |
| apply_overflow: "Function.prototype.apply cannot support %0 arguments", |
| // SyntaxError |
| unable_to_parse: "Parse error", |
| duplicate_regexp_flag: "Duplicate RegExp flag %0", |
| invalid_regexp: "Invalid RegExp pattern /%0/", |
| illegal_break: "Illegal break statement", |
| illegal_continue: "Illegal continue statement", |
| illegal_return: "Illegal return statement", |
| error_loading_debugger: "Error loading debugger", |
| no_input_to_regexp: "No input to %0", |
| result_not_primitive: "Result of %0 must be a primitive, was %1", |
| invalid_json: "String '%0' is not valid JSON", |
| circular_structure: "Converting circular structure to JSON", |
| object_keys_non_object: "Object.keys called on non-object" |
| }; |
| } |
| var format = kMessages[message.type]; |
| if (!format) return "<unknown message " + message.type + ">"; |
| return FormatString(format, message.args); |
| } |
| |
| |
| function GetLineNumber(message) { |
| if (message.startPos == -1) return -1; |
| var location = message.script.locationFromPosition(message.startPos, true); |
| if (location == null) return -1; |
| 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 location = message.script.locationFromPosition(message.startPos, true); |
| if (location == null) return ""; |
| location.restrict(); |
| return location.sourceText(); |
| } |
| |
| |
| function MakeTypeError(type, args) { |
| return MakeGenericError($TypeError, type, args); |
| } |
| |
| |
| function MakeRangeError(type, args) { |
| return MakeGenericError($RangeError, type, args); |
| } |
| |
| |
| function MakeSyntaxError(type, args) { |
| return MakeGenericError($SyntaxError, type, args); |
| } |
| |
| |
| function MakeReferenceError(type, args) { |
| return MakeGenericError($ReferenceError, type, args); |
| } |
| |
| |
| function MakeEvalError(type, args) { |
| return MakeGenericError($EvalError, type, args); |
| } |
| |
| |
| function MakeError(type, args) { |
| return MakeGenericError($Error, type, args); |
| } |
| |
| /** |
| * 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. |
| */ |
| Script.prototype.lineFromPosition = function(position) { |
| var lower = 0; |
| var upper = this.lineCount() - 1; |
| |
| // We'll never find invalid positions so bail right away. |
| if (position > this.line_ends[upper]) { |
| return -1; |
| } |
| |
| // This means we don't have to safe-guard indexing line_ends[i - 1]. |
| if (position <= this.line_ends[0]) { |
| return 0; |
| } |
| |
| // Binary search to find line # from position range. |
| while (upper >= 1) { |
| var i = (lower + upper) >> 1; |
| |
| if (position > this.line_ends[i]) { |
| lower = i + 1; |
| } else if (position <= this.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. |
| */ |
| Script.prototype.locationFromPosition = function (position, |
| include_resource_offset) { |
| var line = this.lineFromPosition(position); |
| if (line == -1) return null; |
| |
| // Determine start, end and column. |
| var start = line == 0 ? 0 : this.line_ends[line - 1] + 1; |
| var end = this.line_ends[line]; |
| if (end > 0 && StringCharAt.call(this.source, end - 1) == '\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. |
| */ |
| Script.prototype.locationFromLine = function (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 |
| */ |
| Script.prototype.sourceSlice = function (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 from_position = from_line == 0 ? 0 : this.line_ends[from_line - 1] + 1; |
| var to_position = to_line == 0 ? 0 : this.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); |
| } |
| |
| |
| Script.prototype.sourceLine = function (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 start = line == 0 ? 0 : this.line_ends[line - 1] + 1; |
| var end = this.line_ends[line]; |
| return StringSubstring.call(this.source, start, end); |
| } |
| |
| |
| /** |
| * Returns the number of source lines. |
| * @return {number} |
| * Number of source lines. |
| */ |
| Script.prototype.lineCount = function() { |
| // Return number of source lines. |
| return this.line_ends.length; |
| }; |
| |
| |
| /** |
| * 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; |
| } |
| |
| |
| const kLineLengthLimit = 78; |
| |
| /** |
| * Restrict source location start and end positions to make the source slice |
| * no more that a certain number of characters wide. |
| * @param {number} opt_limit The with limit of the source text with a default |
| * of 78 |
| * @param {number} opt_before The number of characters to prefer before the |
| * position with a default value of 10 less that the limit |
| */ |
| SourceLocation.prototype.restrict = function (opt_limit, opt_before) { |
| // Find the actual limit to use. |
| var limit; |
| var before; |
| if (!IS_UNDEFINED(opt_limit)) { |
| limit = opt_limit; |
| } else { |
| limit = kLineLengthLimit; |
| } |
| if (!IS_UNDEFINED(opt_before)) { |
| before = opt_before; |
| } else { |
| // If no before is specified center for small limits and perfer more source |
| // before the the position that after for longer limits. |
| if (limit <= 20) { |
| before = $floor(limit / 2); |
| } else { |
| before = limit - 10; |
| } |
| } |
| if (before >= limit) { |
| before = limit - 1; |
| } |
| |
| // If the [start, end[ interval is too big we restrict |
| // it in one or both ends. We make sure to always produce |
| // restricted intervals of maximum allowed size. |
| if (this.end - this.start > limit) { |
| var start_limit = this.position - before; |
| var end_limit = this.position + limit - before; |
| if (this.start < start_limit && end_limit < this.end) { |
| this.start = start_limit; |
| this.end = end_limit; |
| } else if (this.start < start_limit) { |
| this.start = this.end - limit; |
| } else { |
| this.end = this.start + limit; |
| } |
| } |
| }; |
| |
| |
| /** |
| * Get the source text for a SourceLocation |
| * @return {String} |
| * Source text for this location. |
| */ |
| SourceLocation.prototype.sourceText = function () { |
| return StringSubstring.call(this.script.source, this.start, this.end); |
| }; |
| |
| |
| /** |
| * 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) |
| */ |
| SourceSlice.prototype.sourceText = function () { |
| return StringSubstring.call(this.script.source, this.from_position, this.to_position); |
| }; |
| |
| |
| // Returns the offset of the given position within the containing |
| // line. |
| function GetPositionInLine(message) { |
| var location = message.script.locationFromPosition(message.startPos, false); |
| if (location == null) return -1; |
| location.restrict(); |
| return message.startPos - location.start; |
| } |
| |
| |
| function ErrorMessage(type, args, startPos, endPos, script, stackTrace) { |
| this.startPos = startPos; |
| this.endPos = endPos; |
| this.type = type; |
| this.args = args; |
| this.script = script; |
| this.stackTrace = stackTrace; |
| } |
| |
| |
| function MakeMessage(type, args, startPos, endPos, script, stackTrace) { |
| return new ErrorMessage(type, args, startPos, endPos, script, stackTrace); |
| } |
| |
| |
| function GetStackTraceLine(recv, fun, pos, isGlobal) { |
| return FormatSourcePosition(new CallSite(recv, fun, pos)); |
| } |
| |
| // ---------------------------------------------------------------------------- |
| // Error implementation |
| |
| // If this object gets passed to an error constructor the error will |
| // get an accessor for .message that constructs a descriptive error |
| // message on access. |
| var kAddMessageAccessorsMarker = { }; |
| |
| // Defines accessors for a property that is calculated the first time |
| // the property is read. |
| function DefineOneShotAccessor(obj, name, fun) { |
| // Note that the accessors consistently operate on 'obj', not 'this'. |
| // Since the object may occur in someone else's prototype chain we |
| // can't rely on 'this' being the same as 'obj'. |
| var hasBeenSet = false; |
| var value; |
| obj.__defineGetter__(name, function () { |
| if (hasBeenSet) { |
| return value; |
| } |
| hasBeenSet = true; |
| value = fun(obj); |
| return value; |
| }); |
| obj.__defineSetter__(name, function (v) { |
| hasBeenSet = true; |
| value = v; |
| }); |
| } |
| |
| function CallSite(receiver, fun, pos) { |
| this.receiver = receiver; |
| this.fun = fun; |
| this.pos = pos; |
| } |
| |
| CallSite.prototype.getThis = function () { |
| return this.receiver; |
| }; |
| |
| CallSite.prototype.getTypeName = function () { |
| var constructor = this.receiver.constructor; |
| if (!constructor) |
| return $Object.prototype.toString.call(this.receiver); |
| var constructorName = constructor.name; |
| if (!constructorName) |
| return $Object.prototype.toString.call(this.receiver); |
| return constructorName; |
| }; |
| |
| CallSite.prototype.isToplevel = function () { |
| if (this.receiver == null) |
| return true; |
| return IS_GLOBAL(this.receiver); |
| }; |
| |
| CallSite.prototype.isEval = function () { |
| var script = %FunctionGetScript(this.fun); |
| return script && script.compilation_type == 1; |
| }; |
| |
| CallSite.prototype.getEvalOrigin = function () { |
| var script = %FunctionGetScript(this.fun); |
| if (!script || script.compilation_type != 1) |
| return null; |
| return new CallSite(null, script.eval_from_function, |
| script.eval_from_position); |
| }; |
| |
| CallSite.prototype.getFunction = function () { |
| return this.fun; |
| }; |
| |
| CallSite.prototype.getFunctionName = function () { |
| // See if the function knows its own name |
| var name = this.fun.name; |
| if (name) { |
| return name; |
| } else { |
| return %FunctionGetInferredName(this.fun); |
| } |
| // Maybe this is an evaluation? |
| var script = %FunctionGetScript(this.fun); |
| if (script && script.compilation_type == 1) |
| return "eval"; |
| return null; |
| }; |
| |
| CallSite.prototype.getMethodName = function () { |
| // See if we can find a unique property on the receiver that holds |
| // this function. |
| var ownName = this.fun.name; |
| if (ownName && this.receiver && this.receiver[ownName] === this.fun) |
| // To handle DontEnum properties we guess that the method has |
| // the same name as the function. |
| return ownName; |
| var name = null; |
| for (var prop in this.receiver) { |
| if (this.receiver[prop] === this.fun) { |
| // If we find more than one match bail out to avoid confusion |
| if (name) |
| return null; |
| name = prop; |
| } |
| } |
| if (name) |
| return name; |
| return null; |
| }; |
| |
| CallSite.prototype.getFileName = function () { |
| var script = %FunctionGetScript(this.fun); |
| return script ? script.name : null; |
| }; |
| |
| CallSite.prototype.getLineNumber = function () { |
| if (this.pos == -1) |
| return null; |
| var script = %FunctionGetScript(this.fun); |
| var location = null; |
| if (script) { |
| location = script.locationFromPosition(this.pos, true); |
| } |
| return location ? location.line + 1 : null; |
| }; |
| |
| CallSite.prototype.getColumnNumber = function () { |
| if (this.pos == -1) |
| return null; |
| var script = %FunctionGetScript(this.fun); |
| var location = null; |
| if (script) { |
| location = script.locationFromPosition(this.pos, true); |
| } |
| return location ? location.column : null; |
| }; |
| |
| CallSite.prototype.isNative = function () { |
| var script = %FunctionGetScript(this.fun); |
| return script ? (script.type == 0) : false; |
| }; |
| |
| CallSite.prototype.getPosition = function () { |
| return this.pos; |
| }; |
| |
| CallSite.prototype.isConstructor = function () { |
| var constructor = this.receiver ? this.receiver.constructor : null; |
| if (!constructor) |
| return false; |
| return this.fun === constructor; |
| }; |
| |
| function FormatSourcePosition(frame) { |
| var fileLocation = ""; |
| if (frame.isNative()) { |
| fileLocation = "native"; |
| } else if (frame.isEval()) { |
| fileLocation = "eval at " + FormatSourcePosition(frame.getEvalOrigin()); |
| } else { |
| var fileName = frame.getFileName(); |
| if (fileName) { |
| fileLocation += fileName; |
| var lineNumber = frame.getLineNumber(); |
| if (lineNumber != null) { |
| fileLocation += ":" + lineNumber; |
| var columnNumber = frame.getColumnNumber(); |
| if (columnNumber) { |
| fileLocation += ":" + columnNumber; |
| } |
| } |
| } |
| } |
| if (!fileLocation) { |
| fileLocation = "unknown source"; |
| } |
| var line = ""; |
| var functionName = frame.getFunction().name; |
| var methodName = frame.getMethodName(); |
| var addPrefix = true; |
| var isConstructor = frame.isConstructor(); |
| var isMethodCall = !(frame.isToplevel() || isConstructor); |
| if (isMethodCall) { |
| line += frame.getTypeName() + "."; |
| if (functionName) { |
| line += functionName; |
| if (methodName && (methodName != functionName)) { |
| line += " [as " + methodName + "]"; |
| } |
| } else { |
| line += methodName || "<anonymous>"; |
| } |
| } else if (isConstructor) { |
| line += "new " + (functionName || "<anonymous>"); |
| } else if (functionName) { |
| line += functionName; |
| } else { |
| line += fileLocation; |
| addPrefix = false; |
| } |
| if (addPrefix) { |
| line += " (" + fileLocation + ")"; |
| } |
| return line; |
| } |
| |
| function FormatStackTrace(error, frames) { |
| var lines = []; |
| try { |
| lines.push(error.toString()); |
| } catch (e) { |
| try { |
| lines.push("<error: " + e + ">"); |
| } catch (ee) { |
| lines.push("<error>"); |
| } |
| } |
| for (var i = 0; i < frames.length; i++) { |
| var frame = frames[i]; |
| try { |
| var line = FormatSourcePosition(frame); |
| } catch (e) { |
| try { |
| var line = "<error: " + e + ">"; |
| } catch (ee) { |
| // Any code that reaches this point is seriously nasty! |
| var line = "<error>"; |
| } |
| } |
| lines.push(" at " + line); |
| } |
| return lines.join("\n"); |
| } |
| |
| function FormatRawStackTrace(error, raw_stack) { |
| var frames = [ ]; |
| for (var i = 0; i < raw_stack.length; i += 3) { |
| var recv = raw_stack[i]; |
| var fun = raw_stack[i+1]; |
| var pc = raw_stack[i+2]; |
| var pos = %FunctionGetPositionForOffset(fun, pc); |
| frames.push(new CallSite(recv, fun, pos)); |
| } |
| if (IS_FUNCTION($Error.prepareStackTrace)) { |
| return $Error.prepareStackTrace(error, frames); |
| } else { |
| return FormatStackTrace(error, frames); |
| } |
| } |
| |
| function DefineError(f) { |
| // Store the error function in both the global object |
| // and the runtime object. The function is fetched |
| // from the runtime object when throwing errors from |
| // within the runtime system to avoid strange side |
| // effects when overwriting the error functions from |
| // user code. |
| var name = f.name; |
| %SetProperty(global, name, f, DONT_ENUM); |
| this['$' + name] = f; |
| // 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. |
| function ErrorPrototype() {} |
| %FunctionSetPrototype(ErrorPrototype, $Object.prototype); |
| %FunctionSetInstanceClassName(ErrorPrototype, 'Error'); |
| %FunctionSetPrototype(f, new ErrorPrototype()); |
| } else { |
| %FunctionSetPrototype(f, new $Error()); |
| } |
| %FunctionSetInstanceClassName(f, 'Error'); |
| %SetProperty(f.prototype, 'constructor', f, DONT_ENUM); |
| f.prototype.name = name; |
| %SetCode(f, function(m) { |
| if (%_IsConstructCall()) { |
| if (m === kAddMessageAccessorsMarker) { |
| DefineOneShotAccessor(this, 'message', function (obj) { |
| return FormatMessage({type: obj.type, args: obj.arguments}); |
| }); |
| } else if (!IS_UNDEFINED(m)) { |
| this.message = ToString(m); |
| } |
| captureStackTrace(this, f); |
| } else { |
| return new f(m); |
| } |
| }); |
| } |
| |
| function captureStackTrace(obj, cons_opt) { |
| var stackTraceLimit = $Error.stackTraceLimit; |
| if (!stackTraceLimit) return; |
| if (stackTraceLimit < 0 || stackTraceLimit > 10000) |
| stackTraceLimit = 10000; |
| var raw_stack = %CollectStackTrace(cons_opt ? cons_opt : captureStackTrace, |
| stackTraceLimit); |
| DefineOneShotAccessor(obj, 'stack', function (obj) { |
| return FormatRawStackTrace(obj, raw_stack); |
| }); |
| }; |
| |
| $Math.__proto__ = global.Object.prototype; |
| |
| DefineError(function Error() { }); |
| DefineError(function TypeError() { }); |
| DefineError(function RangeError() { }); |
| DefineError(function SyntaxError() { }); |
| DefineError(function ReferenceError() { }); |
| DefineError(function EvalError() { }); |
| DefineError(function URIError() { }); |
| |
| $Error.captureStackTrace = captureStackTrace; |
| |
| // Setup extra properties of the Error.prototype object. |
| $Error.prototype.message = ''; |
| |
| %SetProperty($Error.prototype, 'toString', function toString() { |
| var type = this.type; |
| if (type && !this.hasOwnProperty("message")) { |
| return this.name + ": " + FormatMessage({ type: type, args: this.arguments }); |
| } |
| var message = this.message; |
| return this.name + (message ? (": " + message) : ""); |
| }, DONT_ENUM); |
| |
| |
| // Boilerplate for exceptions for stack overflows. Used from |
| // Top::StackOverflow(). |
| const kStackOverflowBoilerplate = MakeRangeError('stack_overflow', []); |