Move NoSideEffectToString to C++

src/js/messages.js

 // 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.
 
 // -------------------------------------------------------------------
 
 (function(global, utils) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
-var ArrayJoin;
-var Bool16x8ToString;
-var Bool32x4ToString;
-var Bool8x16ToString;
-var CallSite = utils.ImportNow("CallSite");
-var Float32x4ToString;
-var GlobalObject = global.Object;
+var MakeGenericError = utils.ImportNow("make_generic_error");
 var GlobalError = global.Error;
-var GlobalEvalError = global.EvalError;
 var GlobalRangeError = global.RangeError;
-var GlobalReferenceError = global.ReferenceError;
 var GlobalSyntaxError = global.SyntaxError;
 var GlobalTypeError = global.TypeError;
 var GlobalURIError = global.URIError;
-var Int16x8ToString;
-var Int32x4ToString;
-var Int8x16ToString;
-var InternalArray = utils.InternalArray;
-var internalErrorSymbol = utils.ImportNow("internal_error_symbol");
-var ObjectHasOwnProperty;
-var ObjectToString = utils.ImportNow("object_to_string");
 var Script = utils.ImportNow("Script");
-var stackTraceSymbol = utils.ImportNow("stack_trace_symbol");
-var toStringTagSymbol = utils.ImportNow("to_string_tag_symbol");
-var Uint16x8ToString;
-var Uint32x4ToString;
-var Uint8x16ToString;
-
-utils.Import(function(from) {
-  ArrayJoin = from.ArrayJoin;
-  Bool16x8ToString = from.Bool16x8ToString;
-  Bool32x4ToString = from.Bool32x4ToString;
-  Bool8x16ToString = from.Bool8x16ToString;
-  Float32x4ToString = from.Float32x4ToString;
-  Int16x8ToString = from.Int16x8ToString;
-  Int32x4ToString = from.Int32x4ToString;
-  Int8x16ToString = from.Int8x16ToString;
-  ObjectHasOwnProperty = from.ObjectHasOwnProperty;
-  Uint16x8ToString = from.Uint16x8ToString;
-  Uint32x4ToString = from.Uint32x4ToString;
-  Uint8x16ToString = from.Uint8x16ToString;
-});
 
 // -------------------------------------------------------------------
 
-
-
-function NoSideEffectsObjectToString() {
-  if (IS_UNDEFINED(this)) return "[object Undefined]";
-  if (IS_NULL(this)) return "[object Null]";
-  var O = TO_OBJECT(this);
-  var builtinTag = %_ClassOf(O);
-  var tag = %GetDataProperty(O, toStringTagSymbol);
-  if (!IS_STRING(tag)) {
-    tag = builtinTag;
-  }
-  return `[object ${tag}]`;
-}
-
-function IsErrorObject(obj) {
-  return HAS_PRIVATE(obj, stackTraceSymbol);
-}
-
-function NoSideEffectsErrorToString() {
-  var name = %GetDataProperty(this, "name");
-  var message = %GetDataProperty(this, "message");
-  name = IS_UNDEFINED(name) ? "Error" : NoSideEffectsToString(name);
-  message = IS_UNDEFINED(message) ? "" : NoSideEffectsToString(message);
-  if (name == "") return message;
-  if (message == "") return name;
-  return `${name}: ${message}`;
-}
-
-function NoSideEffectsToString(obj) {
-  if (IS_STRING(obj)) return obj;
-  if (IS_NUMBER(obj)) return %_NumberToString(obj);
-  if (IS_BOOLEAN(obj)) return obj ? 'true' : 'false';
-  if (IS_UNDEFINED(obj)) return 'undefined';
-  if (IS_NULL(obj)) return 'null';
-  if (IS_FUNCTION(obj)) {
-    var str = %FunctionToString(obj);
-    if (str.length > 128) {
-      str = %_SubString(str, 0, 111) + "...<omitted>..." +
-            %_SubString(str, str.length - 2, str.length);
-    }
-    return str;
-  }
-  if (IS_SYMBOL(obj)) return %SymbolDescriptiveString(obj);
-  if (IS_SIMD_VALUE(obj)) {
-    switch (typeof(obj)) {
-      case 'float32x4': return %_Call(Float32x4ToString, obj);
-      case 'int32x4':   return %_Call(Int32x4ToString, obj);
-      case 'int16x8':   return %_Call(Int16x8ToString, obj);
-      case 'int8x16':   return %_Call(Int8x16ToString, obj);
-      case 'uint32x4':   return %_Call(Uint32x4ToString, obj);
-      case 'uint16x8':   return %_Call(Uint16x8ToString, obj);
-      case 'uint8x16':   return %_Call(Uint8x16ToString, obj);
-      case 'bool32x4':  return %_Call(Bool32x4ToString, obj);
-      case 'bool16x8':  return %_Call(Bool16x8ToString, obj);
-      case 'bool8x16':  return %_Call(Bool8x16ToString, obj);
-    }
-  }
-
-  if (IS_RECEIVER(obj)) {
-    // When internally formatting error objects, use a side-effects-free version
-    // of Error.prototype.toString independent of the actually installed
-    // toString method.
-    if (IsErrorObject(obj) ||
-        %GetDataProperty(obj, "toString") === ErrorToString) {
-      return %_Call(NoSideEffectsErrorToString, obj);
-    }
-
-    if (%GetDataProperty(obj, "toString") === ObjectToString) {
-      var constructor = %GetDataProperty(obj, "constructor");
-      if (IS_FUNCTION(constructor)) {
-        var constructor_name = %FunctionGetName(constructor);
-        if (constructor_name != "") return `#<${constructor_name}>`;
-      }
-    }
-  }
-
-  return %_Call(NoSideEffectsObjectToString, obj);
-}
-
-
-function MakeGenericError(constructor, type, arg0, arg1, arg2) {
-  var error = new constructor(FormatMessage(type, arg0, arg1, arg2));
-  error[internalErrorSymbol] = true;
-  return error;
-}
-
-
 /**
  * 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 = NoSideEffectsToString(arg0);
-  var arg1 = NoSideEffectsToString(arg1);
-  var arg2 = NoSideEffectsToString(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;
 }
 
 
@@ skipping 100 matching lines @@
 
 function MakeTypeError(type, arg0, arg1, arg2) {
   return MakeGenericError(GlobalTypeError, type, arg0, arg1, arg2);
 }
 
 function MakeURIError() {
   return MakeGenericError(GlobalURIError, kURIMalformed);
 }
 
 %InstallToContext([
-  "make_error_function", MakeGenericError,
   "make_range_error", MakeRangeError,
   "make_type_error", MakeTypeError,
   "message_get_column_number", GetColumnNumber,
   "message_get_line_number", GetLineNumber,
   "message_get_source_line", GetSourceLine,
-  "no_side_effects_to_string_fun", NoSideEffectsToString,
 ]);
 
 utils.Export(function(to) {
   to.ErrorToString = ErrorToString;
   to.MakeError = MakeError;
   to.MakeRangeError = MakeRangeError;
   to.MakeSyntaxError = MakeSyntaxError;
   to.MakeTypeError = MakeTypeError;
   to.MakeURIError = MakeURIError;
 });
 
 });