| // Copyright 2006-2007 Google Inc. 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. |
| |
| |
| // ------------------------------------------------------------------- |
| |
| const kVowelSounds = {a: true, e: true, i: true, o: true, u: true, y: true}; |
| const 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}; |
| |
| function GetInstanceName(cons) { |
| if (cons.length == 0) { |
| return ""; |
| } |
| var first = cons.charAt(0).toLowerCase(); |
| var mapping = kVowelSounds; |
| if (cons.length > 1 && (cons.charAt(0) != first)) { |
| // First char is upper case |
| var second = cons.charAt(1).toLowerCase(); |
| // Second char is upper case |
| if (cons.charAt(1) != second) |
| mapping = kCapitalVowelSounds; |
| } |
| var s = mapping[first] ? "an " : "a "; |
| return s + cons; |
| }; |
| |
| |
| const 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", |
| expected_label: "Expected label", |
| malformed_regexp: "Invalid regular expression: /%0/: %1", |
| unterminated_regexp: "Invalid regular expression: missing /", |
| pcre_error: "PCRE function %0, error code %1", |
| 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'", |
| invalid_break: "Invalid break statement", |
| invalid_continue: "Invalid continue statement", |
| 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", |
| null_or_undefined: "Cannot access property of null or undefined", |
| 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", |
| illegal_eval: "Unsupported indirect eval() call", |
| 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", |
| // RangeError |
| invalid_array_length: "Invalid array length", |
| invalid_array_apply_length: "Function.prototype.apply supports only up to 1024 arguments", |
| 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", |
| unrecognized_regexp_flag: "Unrecognized 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 %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 = result.split("%" + i).join(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 (args instanceof $Array) { |
| for (var i = 0; i < args.length; i++) { |
| var elem = args[i]; |
| if (elem instanceof $Array && elem.length > 100) { // arbitrary limit, grab a reasonable slice to report |
| args[i] = elem.slice(0,20).concat("..."); |
| } |
| } |
| } |
| |
| var e = new constructor(); |
| e.type = type; |
| e.arguments = args; |
| return e; |
| }; |
| |
| |
| /** |
| * Setup the Script function and constructor. |
| */ |
| %FunctionSetInstanceClassName(Script, 'Script'); |
| %AddProperty(Script.prototype, 'constructor', Script, DONT_ENUM); |
| %SetCode(Script, function(x) { |
| // Script objects can only be created by the VM. |
| throw new $Error("Not supported"); |
| }); |
| |
| |
| // Helper functions; called from the runtime system. |
| function FormatMessage(message) { |
| var format = kMessages[message.type]; |
| if (!format) return "<unknown message " + message.type + ">"; |
| return FormatString(format, message.args); |
| }; |
| |
| |
| function GetLineNumber(message) { |
| if (message.startPos == -1) return -1; |
| var location = message.script.locationFromPosition(message.startPos); |
| if (location == null) return -1; |
| return location.line + 1; |
| }; |
| |
| |
| // Returns the source code line containing the given source |
| // position, or the empty string if the position is invalid. |
| function GetSourceLine(message) { |
| var location = message.script.locationFromPosition(message.startPos); |
| if (location == null) return ""; |
| location.restrict(); |
| return location.sourceText(); |
| }; |
| |
| |
| function MakeTypeError(type, args) { |
| return MakeGenericError($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); |
| }; |
| |
| |
| /** |
| * Initialize the cached source information in a script. Currently all line |
| * end positions are cached. |
| */ |
| Script.prototype.initSourceInfo_ = function () { |
| // Just return if initialized. |
| if (this.lineEnds_) return; |
| |
| // Collect all line endings. |
| this.lineEnds_ = []; |
| for (var i = 0; i < this.source.length; i++) { |
| var current = this.source.charAt(i); |
| if (current == '\n') { |
| this.lineEnds_.push(i); |
| } |
| } |
| |
| // If the script does not end with a line ending add the final end position |
| // as just past the last line ending. |
| if (this.lineEnds_[this.lineEnds_.length - 1] != this.source.length - 1) { |
| this.lineEnds_.push(this.source.length); |
| } |
| }; |
| |
| |
| /** |
| * Get information on a specific source position. |
| * @param {number} position The source position |
| * @return {SourceLocation} |
| * If line is negative or not in the source null is returned. |
| */ |
| Script.prototype.locationFromPosition = function (position) { |
| // Make sure source info has been initialized. |
| this.initSourceInfo_(); |
| |
| var lineCount = this.lineCount(); |
| var line = -1; |
| if (position <= this.lineEnds_[0]) { |
| line = 0; |
| } else { |
| for (var i = 1; i < lineCount; i++) { |
| if (this.lineEnds_[i - 1] < position && position <= this.lineEnds_[i]) { |
| line = i; |
| break; |
| } |
| } |
| } |
| |
| if (line == -1) return null; |
| |
| // Determine start, end and column. |
| var start = line == 0 ? 0 : this.lineEnds_[line - 1] + 1; |
| var end = this.lineEnds_[line]; |
| if (end > 0 && this.source.charAt(end - 1) == '\r') end--; |
| var column = position - start; |
| |
| // Adjust according to the offset within the resource. |
| 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) { |
| // Make soure source info has been initialized. |
| this.initSourceInfo_(); |
| |
| // 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); |
| } else { |
| // Find the line where the offset position is located |
| var lineCount = this.lineCount(); |
| var offset_line; |
| for (var i = 0; i < lineCount; i++) { |
| if (offset_position <= this.lineEnds_[i]) { |
| offset_line = i; |
| break; |
| } |
| } |
| if (offset_line + line >= lineCount) return null; |
| return this.locationFromPosition(this.lineEnds_[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) { |
| // Make soure source info has been initialized. |
| this.initSourceInfo_(); |
| |
| 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.lineEnds_[from_line - 1] + 1; |
| var to_position = to_line == 0 ? 0 : this.lineEnds_[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.lineEnds_[line - 1] + 1; |
| var end = this.lineEnds_[line]; |
| return this.source.substring(start, end); |
| } |
| |
| |
| /** |
| * Returns the number of source lines. |
| * @return {number} |
| * Number of source lines. |
| */ |
| Script.prototype.lineCount = function() { |
| // Make soure source info has been initialized. |
| this.initSourceInfo_(); |
| |
| // Return number of source lines. |
| return this.lineEnds_.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 = $Math_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 this.script.source.substring(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 this.script.source.substring(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); |
| if (location == null) return -1; |
| location.restrict(); |
| return message.startPos - location.start; |
| }; |
| |
| |
| function ErrorMessage(type, args, startPos, endPos, script) { |
| this.startPos = startPos; |
| this.endPos = endPos; |
| this.type = type; |
| this.args = args; |
| this.script = script; |
| }; |
| |
| |
| function MakeMessage(type, args, startPos, endPos, script) { |
| return new ErrorMessage(type, args, startPos, endPos, script); |
| }; |
| |
| |
| function GetStackTraceLine(recv, fun, pos, isGlobal) { |
| try { |
| return UnsafeGetStackTraceLine(recv, fun, pos, isGlobal); |
| } catch (e) { |
| return "<error: " + e + ">"; |
| } |
| }; |
| |
| |
| function GetFunctionName(fun, recv) { |
| var name = %FunctionGetName(fun); |
| if (name) return name; |
| for (var prop in recv) { |
| if (recv[prop] === fun) |
| return prop; |
| } |
| return "[anonymous]"; |
| }; |
| |
| |
| function UnsafeGetStackTraceLine(recv, fun, pos, isTopLevel) { |
| var result = ""; |
| // The global frame has no meaningful function or receiver |
| if (!isTopLevel) { |
| // If the receiver is not the global object then prefix the |
| // message send |
| if (recv !== global) |
| result += ToDetailString(recv) + "."; |
| result += GetFunctionName(fun, recv); |
| } |
| if (pos != -1) { |
| var script = %FunctionGetScript(fun); |
| var file; |
| if (script) { |
| file = %FunctionGetScript(fun).data; |
| } |
| if (file) { |
| var location = %FunctionGetScript(fun).locationFromPosition(pos); |
| if (!isTopLevel) result += "("; |
| result += file; |
| if (location != null) { |
| result += ":" + (location.line + 1) + ":" + (location.column + 1); |
| } |
| if (!isTopLevel) result += ")"; |
| } |
| } |
| return (result) ? " at " + result : result; |
| }; |
| |
| |
| // ---------------------------------------------------------------------------- |
| // Error implementation |
| |
| function DefineError(name) { |
| var f = function(msg) {}; |
| // 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. |
| %AddProperty(global, name, f, DONT_ENUM); |
| this['$' + name] = f; |
| // Configure the error function. |
| // prototype of 'Error' must be as default: new Object(). |
| if (name != 'Error') %FunctionSetPrototype(f, new $Error()); |
| %FunctionSetInstanceClassName(f, 'Error'); |
| f.prototype.name = name; |
| f.prototype.constructor = f; |
| %SetCode(f, function(m) { |
| if (%IsConstructCall()) { |
| if (!IS_UNDEFINED(m)) this.message = ToString(m); |
| } else { |
| return new f(m); |
| } |
| }); |
| }; |
| |
| $Math.__proto__ = global.Object.prototype; |
| |
| DefineError('Error'); |
| DefineError('TypeError'); |
| DefineError('RangeError'); |
| DefineError('SyntaxError'); |
| DefineError('ReferenceError'); |
| DefineError('EvalError'); |
| DefineError('URIError'); |
| |
| // Setup extra properties of the Error.prototype object. |
| $Error.prototype.message = ''; |
| |
| %AddProperty($Error.prototype, 'toString', function() { |
| 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', []); |