Hide RegExp and String initialization in a closure.

src/math.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.
 
-// This file relies on the fact that the following declarations have been made
-// in runtime.js:
-// var $Object = global.Object;
-
-// Instance class name can only be set on functions. That is the only
-// purpose for MathConstructor.
-
 var rngstate;  // Initialized to a Uint32Array during genesis.
 
 var $abs;
 var $exp;
 var $floor;
 var $max;
 var $min;
 
-// -------------------------------------------------------------------
-
 (function() {
 
 "use strict";
 
+%CheckIsBootstrapping();
+
+var GlobalObject = global.Object;
+var GlobalArray = global.Array;
+
+//-------------------------------------------------------------------
+
 // ECMA 262 - 15.8.2.1
 function MathAbs(x) {
   if (%_IsSmi(x)) return x >= 0 ? x : -x;
   x = TO_NUMBER_INLINE(x);
   if (x === 0) return 0;  // To handle -0.
   return x > 0 ? x : -x;
 }
 
 // ECMA 262 - 15.8.2.2
 function MathAcosJS(x) {
@@ skipping 250 matching lines @@
   var approx_hi = MathFloor(%_DoubleHi(x) / 3) + 0x2A9F7893;
   var approx = %_ConstructDouble(approx_hi, 0);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   approx = NEWTON_ITERATION_CBRT(x, approx);
   return NEWTON_ITERATION_CBRT(x, approx);
 }
 
 // -------------------------------------------------------------------
 
-%CheckIsBootstrapping();
-
+// Instance class name can only be set on functions. That is the only
+// purpose for MathConstructor.
 function MathConstructor() {}
 
 var Math = new MathConstructor();
 
-%InternalSetPrototype(Math, $Object.prototype);
+%InternalSetPrototype(Math, GlobalObject.prototype);
 %AddNamedProperty(global, "Math", Math, DONT_ENUM);
 %FunctionSetInstanceClassName(MathConstructor, 'Math');
 
 %AddNamedProperty(Math, symbolToStringTag, "Math", READ_ONLY | DONT_ENUM);
 
 // Set up math constants.
-InstallConstants(Math, $Array(
+InstallConstants(Math, GlobalArray(
   // ECMA-262, section 15.8.1.1.
   "E", 2.7182818284590452354,
   // ECMA-262, section 15.8.1.2.
   "LN10", 2.302585092994046,
   // ECMA-262, section 15.8.1.3.
   "LN2", 0.6931471805599453,
   // ECMA-262, section 15.8.1.4.
   "LOG2E", 1.4426950408889634,
   "LOG10E", 0.4342944819032518,
   "PI", 3.1415926535897932,
   "SQRT1_2", 0.7071067811865476,
   "SQRT2", 1.4142135623730951
 ));
 
 // Set up non-enumerable functions of the Math object and
 // set their names.
-InstallFunctions(Math, DONT_ENUM, $Array(
+InstallFunctions(Math, DONT_ENUM, GlobalArray(
   "random", MathRandom,
   "abs", MathAbs,
   "acos", MathAcosJS,
   "asin", MathAsinJS,
   "atan", MathAtanJS,
   "ceil", MathCeil,
   "exp", MathExp,
   "floor", MathFloor,
   "log", MathLog,
   "round", MathRound,
@@ skipping 20 matching lines @@
 %SetInlineBuiltinFlag(MathRandom);
 
 // Expose to the global scope.
 $abs = MathAbs;
 $exp = MathExp;
 $floor = MathFloor;
 $max = MathMax;
 $min = MathMin;
 
 })();