Upgrade V8 to version 4.9.385.28
https://chromium.googlesource.com/v8/v8/+/4.9.385.28
FPIIM-449
Change-Id: I4b2e74289d4bf3667f2f3dc8aa2e541f63e26eb4
diff --git a/src/js/runtime.js b/src/js/runtime.js
new file mode 100644
index 0000000..301d75a
--- /dev/null
+++ b/src/js/runtime.js
@@ -0,0 +1,191 @@
+// Copyright 2006-2008 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.
+
+// This files contains runtime support implemented in JavaScript.
+
+// CAUTION: Some of the functions specified in this file are called
+// directly from compiled code. These are the functions with names in
+// ALL CAPS. The compiled code passes the first argument in 'this'.
+
+
+// The following declarations are shared with other native JS files.
+// They are all declared at this one spot to avoid redeclaration errors.
+
+(function(global, utils) {
+
+%CheckIsBootstrapping();
+
+var FLAG_harmony_species;
+var GlobalArray = global.Array;
+var GlobalBoolean = global.Boolean;
+var GlobalString = global.String;
+var MakeRangeError;
+var MakeTypeError;
+var speciesSymbol;
+
+utils.Import(function(from) {
+ MakeRangeError = from.MakeRangeError;
+ MakeTypeError = from.MakeTypeError;
+ speciesSymbol = from.species_symbol;
+});
+
+utils.ImportFromExperimental(function(from) {
+ FLAG_harmony_species = from.FLAG_harmony_species;
+});
+
+// ----------------------------------------------------------------------------
+
+/* -----------------------------
+ - - - H e l p e r s - - -
+ -----------------------------
+*/
+
+function CONCAT_ITERABLE_TO_ARRAY(iterable) {
+ return %concat_iterable_to_array(this, iterable);
+};
+
+
+/* -------------------------------------
+ - - - C o n v e r s i o n s - - -
+ -------------------------------------
+*/
+
+// ES5, section 9.12
+function SameValue(x, y) {
+ if (typeof x != typeof y) return false;
+ if (IS_NUMBER(x)) {
+ if (NUMBER_IS_NAN(x) && NUMBER_IS_NAN(y)) return true;
+ // x is +0 and y is -0 or vice versa.
+ if (x === 0 && y === 0 && %_IsMinusZero(x) != %_IsMinusZero(y)) {
+ return false;
+ }
+ }
+ if (IS_SIMD_VALUE(x)) return %SimdSameValue(x, y);
+ return x === y;
+}
+
+
+// ES6, section 7.2.4
+function SameValueZero(x, y) {
+ if (typeof x != typeof y) return false;
+ if (IS_NUMBER(x)) {
+ if (NUMBER_IS_NAN(x) && NUMBER_IS_NAN(y)) return true;
+ }
+ if (IS_SIMD_VALUE(x)) return %SimdSameValueZero(x, y);
+ return x === y;
+}
+
+
+function ConcatIterableToArray(target, iterable) {
+ var index = target.length;
+ for (var element of iterable) {
+ AddIndexedProperty(target, index++, element);
+ }
+ return target;
+}
+
+
+/* ---------------------------------
+ - - - U t i l i t i e s - - -
+ ---------------------------------
+*/
+
+
+// This function should be called rather than %AddElement in contexts where the
+// argument might not be less than 2**32-1. ES2015 ToLength semantics mean that
+// this is a concern at basically all callsites.
+function AddIndexedProperty(obj, index, value) {
+ if (index === TO_UINT32(index) && index !== kMaxUint32) {
+ %AddElement(obj, index, value);
+ } else {
+ %AddNamedProperty(obj, TO_STRING(index), value, NONE);
+ }
+}
+%SetForceInlineFlag(AddIndexedProperty);
+
+
+function ToPositiveInteger(x, rangeErrorIndex) {
+ var i = TO_INTEGER_MAP_MINUS_ZERO(x);
+ if (i < 0) throw MakeRangeError(rangeErrorIndex);
+ return i;
+}
+
+
+function MaxSimple(a, b) {
+ return a > b ? a : b;
+}
+
+
+function MinSimple(a, b) {
+ return a > b ? b : a;
+}
+
+
+%SetForceInlineFlag(MaxSimple);
+%SetForceInlineFlag(MinSimple);
+
+
+// ES2015 7.3.20
+// For the fallback with --harmony-species off, there are two possible choices:
+// - "conservative": return defaultConstructor
+// - "not conservative": return object.constructor
+// This fallback path is only needed in the transition to ES2015, and the
+// choice is made simply to preserve the previous behavior so that we don't
+// have a three-step upgrade: old behavior, unspecified intermediate behavior,
+// and ES2015.
+// In some cases, we were "conservative" (e.g., ArrayBuffer, RegExp), and in
+// other cases we were "not conservative (e.g., TypedArray, Promise).
+function SpeciesConstructor(object, defaultConstructor, conservative) {
+ if (FLAG_harmony_species) {
+ var constructor = object.constructor;
+ if (IS_UNDEFINED(constructor)) {
+ return defaultConstructor;
+ }
+ if (!IS_RECEIVER(constructor)) {
+ throw MakeTypeError(kConstructorNotReceiver);
+ }
+ var species = constructor[speciesSymbol];
+ if (IS_NULL_OR_UNDEFINED(species)) {
+ return defaultConstructor;
+ }
+ if (%IsConstructor(species)) {
+ return species;
+ }
+ throw MakeTypeError(kSpeciesNotConstructor);
+ } else {
+ return conservative ? defaultConstructor : object.constructor;
+ }
+}
+
+//----------------------------------------------------------------------------
+
+// NOTE: Setting the prototype for Array must take place as early as
+// possible due to code generation for array literals. When
+// generating code for a array literal a boilerplate array is created
+// that is cloned when running the code. It is essential that the
+// boilerplate gets the right prototype.
+%FunctionSetPrototype(GlobalArray, new GlobalArray(0));
+
+// ----------------------------------------------------------------------------
+// Exports
+
+utils.Export(function(to) {
+ to.AddIndexedProperty = AddIndexedProperty;
+ to.MaxSimple = MaxSimple;
+ to.MinSimple = MinSimple;
+ to.SameValue = SameValue;
+ to.SameValueZero = SameValueZero;
+ to.ToPositiveInteger = ToPositiveInteger;
+ to.SpeciesConstructor = SpeciesConstructor;
+});
+
+%InstallToContext([
+ "concat_iterable_to_array_builtin", CONCAT_ITERABLE_TO_ARRAY,
+]);
+
+%InstallToContext([
+ "concat_iterable_to_array", ConcatIterableToArray,
+]);
+
+})