Move V8 to external/v8
Change-Id: If68025d67453785a651c5dfb34fad298c16676a4
diff --git a/src/messages.js b/src/messages.js
new file mode 100644
index 0000000..2720792
--- /dev/null
+++ b/src/messages.js
@@ -0,0 +1,897 @@
+// 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;
+
+// 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 = { };
+
+
+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
+
+// 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];
+ var line;
+ try {
+ line = FormatSourcePosition(frame);
+ } catch (e) {
+ try {
+ line = "<error: " + e + ">";
+ } catch (ee) {
+ // Any code that reaches this point is seriously nasty!
+ 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', []);