WIP SharedArrayBuffer implementation

test/mjsunit/shared-typed-arrays.js

-// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright 2015 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.
 
-// Flags: --harmony-tostring
+// Flags: --harmony_shared_typed_arrays
 
-// ArrayBuffer
+// SharedArrayBuffer
 
 function TestByteLength(param, expectedByteLength) {
-  var ab = new ArrayBuffer(param);
-  assertSame(expectedByteLength, ab.byteLength);
+  var sab = new SharedArrayBuffer(param);
+  assertSame(expectedByteLength, sab.byteLength);
 }
 
 function TestArrayBufferCreation() {
   TestByteLength(1, 1);
   TestByteLength(256, 256);
   TestByteLength(2.567, 2);
 
   TestByteLength("abc", 0);
 
   TestByteLength(0, 0);
 
-  assertThrows(function() { new ArrayBuffer(-10); }, RangeError);
-  assertThrows(function() { new ArrayBuffer(-2.567); }, RangeError);
+  assertThrows(function() { new SharedArrayBuffer(-10); }, RangeError);
+  assertThrows(function() { new SharedArrayBuffer(-2.567); }, RangeError);
 
 /* TODO[dslomov]: Reenable the test
   assertThrows(function() {
-    var ab1 = new ArrayBuffer(0xFFFFFFFFFFFF)
+    var ab1 = new SharedArrayBuffer(0xFFFFFFFFFFFF)
   }, RangeError);
 */
 
-  var ab = new ArrayBuffer();
-  assertSame(0, ab.byteLength);
-  assertEquals("[object ArrayBuffer]",
-      Object.prototype.toString.call(ab));
+  var sab = new SharedArrayBuffer();
+  assertSame(0, sab.byteLength);
+  assertEquals("[object SharedArrayBuffer]",
+      Object.prototype.toString.call(sab));
 }
 
 TestArrayBufferCreation();
 
 function TestByteLengthNotWritable() {
-  var ab = new ArrayBuffer(1024);
-  assertSame(1024, ab.byteLength);
+  var sab = new SharedArrayBuffer(1024);
+  assertSame(1024, sab.byteLength);
 
-  assertThrows(function() { "use strict"; ab.byteLength = 42; }, TypeError);
+  assertThrows(function() { "use strict"; sab.byteLength = 42; }, TypeError);
 }
 
 TestByteLengthNotWritable();
 
-function TestSlice(expectedResultLen, initialLen, start, end) {
-  var ab = new ArrayBuffer(initialLen);
-  var a1 = new Uint8Array(ab);
-  for (var i = 0; i < a1.length; i++) {
-    a1[i] = 0xCA;
-  }
-  var slice = ab.slice(start, end);
-  assertSame(expectedResultLen, slice.byteLength);
-  var a2 = new Uint8Array(slice);
-  for (var i = 0; i < a2.length; i++) {
-    assertSame(0xCA, a2[i]);
-  }
+function TestArrayBufferNoSlice() {
+  var sab = new SharedArrayBuffer(10);
+  assertEquals(undefined, sab.slice);
 }
 
-function TestArrayBufferSlice() {
-  var ab = new ArrayBuffer(1024);
-  var ab1 = ab.slice(512, 1024);
-  assertSame(512, ab1.byteLength);
+TestArrayBufferNoSlice();
 
-  TestSlice(512, 1024, 512, 1024);
-  TestSlice(512, 1024, 512);
+// Shared Typed arrays
 
-  TestSlice(0, 0, 1, 20);
-  TestSlice(100, 100, 0, 100);
-  TestSlice(100, 100, 0, 1000);
-
-  TestSlice(0, 100, 5, 1);
-
-  TestSlice(1, 100, -11, -10);
-  TestSlice(9, 100, -10, 99);
-  TestSlice(0, 100, -10, 80);
-  TestSlice(10, 100, 80, -10);
-
-  TestSlice(10, 100, 90, "100");
-  TestSlice(10, 100, "90", "100");
-
-  TestSlice(0,  100, 90, "abc");
-  TestSlice(10, 100, "abc", 10);
-
-  TestSlice(10, 100, 0.96, 10.96);
-  TestSlice(10, 100, 0.96, 10.01);
-  TestSlice(10, 100, 0.01, 10.01);
-  TestSlice(10, 100, 0.01, 10.96);
-
-  TestSlice(10, 100, 90);
-  TestSlice(10, 100, -10);
-}
-
-TestArrayBufferSlice();
-
-// Typed arrays
-
-function TestTypedArray(constr, elementSize, typicalElement) {
+function TestTypedArray(constr, nonsharedConstr, elementSize, typicalElement) {
   assertSame(elementSize, constr.BYTES_PER_ELEMENT);
 
+  var sab = new SharedArrayBuffer(256*elementSize);
+
+  // Constructing TypedArray from SharedArrayBuffer should throw
+  assertThrows(function() { new nonsharedConstr(sab); }, TypeError);
+
+  // Constructing SharedTypedArray from ArrayBuffer should throw
   var ab = new ArrayBuffer(256*elementSize);
+  assertThrows(function() { new constr(ab); }, TypeError);
 
   var a0 = new constr(30);
   assertEquals("[object " + constr.name + "]",
       Object.prototype.toString.call(a0));
 
-  assertTrue(ArrayBuffer.isView(a0));
+  assertTrue(SharedArrayBuffer.isView(a0));
   assertSame(elementSize, a0.BYTES_PER_ELEMENT);
   assertSame(30, a0.length);
   assertSame(30*elementSize, a0.byteLength);
   assertSame(0, a0.byteOffset);
   assertSame(30*elementSize, a0.buffer.byteLength);
 
   var aLen0 = new constr(0);
   assertSame(elementSize, aLen0.BYTES_PER_ELEMENT);
   assertSame(0, aLen0.length);
   assertSame(0, aLen0.byteLength);
   assertSame(0, aLen0.byteOffset);
   assertSame(0, aLen0.buffer.byteLength);
 
-  var aOverBufferLen0 = new constr(ab, 128*elementSize, 0);
-  assertSame(ab, aOverBufferLen0.buffer);
+  var aOverBufferLen0 = new constr(sab, 128*elementSize, 0);
+  assertSame(sab, aOverBufferLen0.buffer);
   assertSame(elementSize, aOverBufferLen0.BYTES_PER_ELEMENT);
   assertSame(0, aOverBufferLen0.length);
   assertSame(0, aOverBufferLen0.byteLength);
   assertSame(128*elementSize, aOverBufferLen0.byteOffset);
 
-  var a1 = new constr(ab, 128*elementSize, 128);
-  assertSame(ab, a1.buffer);
+  var a1 = new constr(sab, 128*elementSize, 128);
+  assertSame(sab, a1.buffer);
   assertSame(elementSize, a1.BYTES_PER_ELEMENT);
   assertSame(128, a1.length);
   assertSame(128*elementSize, a1.byteLength);
   assertSame(128*elementSize, a1.byteOffset);
 
 
-  var a2 = new constr(ab, 64*elementSize, 128);
-  assertSame(ab, a2.buffer);
+  var a2 = new constr(sab, 64*elementSize, 128);
+  assertSame(sab, a2.buffer);
   assertSame(elementSize, a2.BYTES_PER_ELEMENT);
   assertSame(128, a2.length);
   assertSame(128*elementSize, a2.byteLength);
   assertSame(64*elementSize, a2.byteOffset);
 
-  var a3 = new constr(ab, 192*elementSize);
-  assertSame(ab, a3.buffer);
+  var a3 = new constr(sab, 192*elementSize);
+  assertSame(sab, a3.buffer);
   assertSame(64, a3.length);
   assertSame(64*elementSize, a3.byteLength);
   assertSame(192*elementSize, a3.byteOffset);
 
-  var a4 = new constr(ab);
-  assertSame(ab, a4.buffer);
+  var a4 = new constr(sab);
+  assertSame(sab, a4.buffer);
   assertSame(256, a4.length);
   assertSame(256*elementSize, a4.byteLength);
   assertSame(0, a4.byteOffset);
 
 
   var i;
   for (i = 0; i < 128; i++) {
     a1[i] = typicalElement;
   }
 
@@ skipping 14 matching lines @@
   }
 
   for (i = 0; i < 128; i++) {
     assertSame(0, a4[i]);
   }
 
   for (i = 128; i < 256; i++) {
     assertSame(typicalElement, a4[i]);
   }
 
-  var aAtTheEnd = new constr(ab, 256*elementSize);
+  var aAtTheEnd = new constr(sab, 256*elementSize);
   assertSame(elementSize, aAtTheEnd.BYTES_PER_ELEMENT);
   assertSame(0, aAtTheEnd.length);
   assertSame(0, aAtTheEnd.byteLength);
   assertSame(256*elementSize, aAtTheEnd.byteOffset);
 
-  assertThrows(function () { new constr(ab, 257*elementSize); }, RangeError);
+  assertThrows(function () { new constr(sab, 257*elementSize); }, RangeError);
   assertThrows(
-      function () { new constr(ab, 128*elementSize, 192); },
+      function () { new constr(sab, 128*elementSize, 192); },
       RangeError);
 
   if (elementSize !== 1) {
-    assertThrows(function() { new constr(ab, 128*elementSize - 1, 10); },
+    assertThrows(function() { new constr(sab, 128*elementSize - 1, 10); },
                  RangeError);
-    var unalignedArrayBuffer = new ArrayBuffer(10*elementSize + 1);
+    var unalignedArrayBuffer = new SharedArrayBuffer(10*elementSize + 1);
     var goodArray = new constr(unalignedArrayBuffer, 0, 10);
     assertSame(10, goodArray.length);
     assertSame(10*elementSize, goodArray.byteLength);
     assertThrows(function() { new constr(unalignedArrayBuffer)}, RangeError);
     assertThrows(function() { new constr(unalignedArrayBuffer, 5*elementSize)},
                  RangeError);
   }
 
   var aFromString = new constr("30");
   assertSame(elementSize, aFromString.BYTES_PER_ELEMENT);
   assertSame(30, aFromString.length);
   assertSame(30*elementSize, aFromString.byteLength);
   assertSame(0, aFromString.byteOffset);
   assertSame(30*elementSize, aFromString.buffer.byteLength);
 
+  // Difference from ArrayBuffer -- SharedArrayBuffer cannot be initialized
+  // from Array-like object.
   var jsArray = [];
-  for (i = 0; i < 30; i++) {
-    jsArray.push(typicalElement);
-  }
-  var aFromArray = new constr(jsArray);
-  assertSame(elementSize, aFromArray.BYTES_PER_ELEMENT);
-  assertSame(30, aFromArray.length);
-  assertSame(30*elementSize, aFromArray.byteLength);
-  assertSame(0, aFromArray.byteOffset);
-  assertSame(30*elementSize, aFromArray.buffer.byteLength);
-  for (i = 0; i < 30; i++) {
-    assertSame(typicalElement, aFromArray[i]);
-  }
+  assertThrows(function() { new constr(jsArray); }, TypeError);
 
-  var abLen0 = new ArrayBuffer(0);
+  var abLen0 = new SharedArrayBuffer(0);
   var aOverAbLen0 = new constr(abLen0);
   assertSame(abLen0, aOverAbLen0.buffer);
   assertSame(elementSize, aOverAbLen0.BYTES_PER_ELEMENT);
   assertSame(0, aOverAbLen0.length);
   assertSame(0, aOverAbLen0.byteLength);
   assertSame(0, aOverAbLen0.byteOffset);
 
   var aNoParam = new constr();
   assertSame(elementSize, aNoParam.BYTES_PER_ELEMENT);
   assertSame(0, aNoParam.length);
   assertSame(0, aNoParam.byteLength);
   assertSame(0, aNoParam.byteOffset);
 
-  var a = new constr(ab, 64*elementSize, 128);
+  var a = new constr(sab, 64*elementSize, 128);
   assertEquals("[object " + constr.name + "]",
       Object.prototype.toString.call(a));
   var desc = Object.getOwnPropertyDescriptor(
       constr.prototype, Symbol.toStringTag);
   assertTrue(desc.configurable);
   assertFalse(desc.enumerable);
   assertFalse(!!desc.writable);
   assertFalse(!!desc.set);
   assertEquals("function", typeof desc.get);
 }
 
-TestTypedArray(Uint8Array, 1, 0xFF);
-TestTypedArray(Int8Array, 1, -0x7F);
-TestTypedArray(Uint16Array, 2, 0xFFFF);
-TestTypedArray(Int16Array, 2, -0x7FFF);
-TestTypedArray(Uint32Array, 4, 0xFFFFFFFF);
-TestTypedArray(Int32Array, 4, -0x7FFFFFFF);
-TestTypedArray(Float32Array, 4, 0.5);
-TestTypedArray(Float64Array, 8, 0.5);
-TestTypedArray(Uint8ClampedArray, 1, 0xFF);
+TestTypedArray(SharedUint8Array, Uint8Array, 1, 0xFF);
+TestTypedArray(SharedInt8Array, Int8Array, 1, -0x7F);
+TestTypedArray(SharedUint16Array, Uint16Array, 2, 0xFFFF);
+TestTypedArray(SharedInt16Array, Int16Array, 2, -0x7FFF);
+TestTypedArray(SharedUint32Array, Uint32Array, 4, 0xFFFFFFFF);
+TestTypedArray(SharedInt32Array, Int32Array, 4, -0x7FFFFFFF);
+TestTypedArray(SharedFloat32Array, Float32Array, 4, 0.5);
+TestTypedArray(SharedFloat64Array, Float64Array, 8, 0.5);
+TestTypedArray(SharedUint8ClampedArray, Uint8ClampedArray, 1, 0xFF);
 
-function SubarrayTestCase(constructor, item, expectedResultLen, expectedStartIndex,
-                          initialLen, start, end) {
+
+function SubarrayTestCase(constructor, item, expectedResultLen,
+                          expectedStartIndex, initialLen, start, end) {
   var a = new constructor(initialLen);
   var s = a.subarray(start, end);
   assertSame(constructor, s.constructor);
   assertSame(expectedResultLen, s.length);
   if (s.length > 0) {
     s[0] = item;
     assertSame(item, a[expectedStartIndex]);
   }
 }
 
@@ skipping 25 matching lines @@
 
   SubarrayTestCase(constructor, item, 10,90,        100, 90);
   SubarrayTestCase(constructor, item, 10,90,        100, -10);
 
   var method = constructor.prototype.subarray;
   method.call(new constructor(100), 0, 100);
   var o = {};
   assertThrows(function() { method.call(o, 0, 100); }, TypeError);
 }
 
-TestSubArray(Uint8Array, 0xFF);
-TestSubArray(Int8Array, -0x7F);
-TestSubArray(Uint16Array, 0xFFFF);
-TestSubArray(Int16Array, -0x7FFF);
-TestSubArray(Uint32Array, 0xFFFFFFFF);
-TestSubArray(Int32Array, -0x7FFFFFFF);
-TestSubArray(Float32Array, 0.5);
-TestSubArray(Float64Array, 0.5);
-TestSubArray(Uint8ClampedArray, 0xFF);
+TestSubArray(SharedUint8Array, 0xFF);
+TestSubArray(SharedInt8Array, -0x7F);
+TestSubArray(SharedUint16Array, 0xFFFF);
+TestSubArray(SharedInt16Array, -0x7FFF);
+TestSubArray(SharedUint32Array, 0xFFFFFFFF);
+TestSubArray(SharedInt32Array, -0x7FFFFFFF);
+TestSubArray(SharedFloat32Array, 0.5);
+TestSubArray(SharedFloat64Array, 0.5);
+TestSubArray(SharedUint8ClampedArray, 0xFF);
 
 function TestTypedArrayOutOfRange(constructor, value, result) {
   var a = new constructor(1);
   a[0] = value;
   assertSame(result, a[0]);
 }
 
-TestTypedArrayOutOfRange(Uint8Array, 0x1FA, 0xFA);
-TestTypedArrayOutOfRange(Uint8Array, -1, 0xFF);
+TestTypedArrayOutOfRange(SharedUint8Array, 0x1FA, 0xFA);
+TestTypedArrayOutOfRange(SharedUint8Array, -1, 0xFF);
 
-TestTypedArrayOutOfRange(Int8Array, 0x1FA, 0x7A - 0x80);
+TestTypedArrayOutOfRange(SharedInt8Array, 0x1FA, 0x7A - 0x80);
 
-TestTypedArrayOutOfRange(Uint16Array, 0x1FFFA, 0xFFFA);
-TestTypedArrayOutOfRange(Uint16Array, -1, 0xFFFF);
-TestTypedArrayOutOfRange(Int16Array, 0x1FFFA, 0x7FFA - 0x8000);
+TestTypedArrayOutOfRange(SharedUint16Array, 0x1FFFA, 0xFFFA);
+TestTypedArrayOutOfRange(SharedUint16Array, -1, 0xFFFF);
+TestTypedArrayOutOfRange(SharedInt16Array, 0x1FFFA, 0x7FFA - 0x8000);
 
-TestTypedArrayOutOfRange(Uint32Array, 0x1FFFFFFFA, 0xFFFFFFFA);
-TestTypedArrayOutOfRange(Uint32Array, -1, 0xFFFFFFFF);
-TestTypedArrayOutOfRange(Int32Array, 0x1FFFFFFFA, 0x7FFFFFFA - 0x80000000);
+TestTypedArrayOutOfRange(SharedUint32Array, 0x1FFFFFFFA, 0xFFFFFFFA);
+TestTypedArrayOutOfRange(SharedUint32Array, -1, 0xFFFFFFFF);
+TestTypedArrayOutOfRange(SharedInt32Array, 0x1FFFFFFFA,
+                         0x7FFFFFFA - 0x80000000);
 
-TestTypedArrayOutOfRange(Uint8ClampedArray, 0x1FA, 0xFF);
-TestTypedArrayOutOfRange(Uint8ClampedArray, -1, 0);
+TestTypedArrayOutOfRange(SharedUint8ClampedArray, 0x1FA, 0xFF);
+TestTypedArrayOutOfRange(SharedUint8ClampedArray, -1, 0);
 
 var typedArrayConstructors = [
-  Uint8Array,
-  Int8Array,
-  Uint16Array,
-  Int16Array,
-  Uint32Array,
-  Int32Array,
-  Uint8ClampedArray,
-  Float32Array,
-  Float64Array];
+  SharedUint8Array,
+  SharedInt8Array,
+  SharedUint16Array,
+  SharedInt16Array,
+  SharedUint32Array,
+  SharedInt32Array,
+  SharedUint8ClampedArray,
+  SharedFloat32Array,
+  SharedFloat64Array];
 
 function TestPropertyTypeChecks(constructor) {
   function CheckProperty(name) {
     var d = Object.getOwnPropertyDescriptor(constructor.prototype, name);
     var o = {};
     assertThrows(function() {d.get.call(o);}, TypeError);
     for (var i = 0; i < typedArrayConstructors.length; i++) {
       var ctor = typedArrayConstructors[i];
       var a = new ctor(10);
       if (ctor === constructor) {
         d.get.call(a); // shouldn't throw
       } else {
         assertThrows(function() {d.get.call(a);}, TypeError);
       }
     }
   }
 
   CheckProperty("buffer");
   CheckProperty("byteOffset");
   CheckProperty("byteLength");
   CheckProperty("length");
 }
 
 for(i = 0; i < typedArrayConstructors.length; i++) {
   TestPropertyTypeChecks(typedArrayConstructors[i]);
 }
 
-
 function TestTypedArraySet() {
   // Test array.set in different combinations.
 
   function assertArrayPrefix(expected, array) {
     for (var i = 0; i < expected.length; ++i) {
       assertEquals(expected[i], array[i]);
     }
   }
 
-  var a11 = new Int16Array([1, 2, 3, 4, 0, -1])
-  var a12 = new Uint16Array(15)
+  // SharedTypedArrays don't allow initialization via array-like
+  function initializeFromArray(constructor, array) {
+    var buffer = new constructor(array.length);
+    for (var i = 0; i < array.length; ++i) {
+      buffer[i] = array[i];
+    }
+    return buffer;
+  }
+
+  var a11 = initializeFromArray(SharedInt16Array, [1, 2, 3, 4, 0, -1])
+  var a12 = new SharedUint16Array(15)
   a12.set(a11, 3)
   assertArrayPrefix([0, 0, 0, 1, 2, 3, 4, 0, 0xffff, 0, 0], a12)
   assertThrows(function(){ a11.set(a12) })
 
   var a21 = [1, undefined, 10, NaN, 0, -1, {valueOf: function() {return 3}}]
-  var a22 = new Int32Array(12)
+  var a22 = new SharedInt32Array(12)
   a22.set(a21, 2)
   assertArrayPrefix([0, 0, 1, 0, 10, 0, 0, -1, 3, 0], a22)
 
-  var a31 = new Float32Array([2, 4, 6, 8, 11, NaN, 1/0, -3])
+  var a31 = initializeFromArray(SharedFloat32Array,
+                                [2, 4, 6, 8, 11, NaN, 1/0, -3])
   var a32 = a31.subarray(2, 6)
   a31.set(a32, 4)
   assertArrayPrefix([2, 4, 6, 8, 6, 8, 11, NaN], a31)
   assertArrayPrefix([6, 8, 6, 8], a32)
 
-  var a4 = new Uint8ClampedArray([3,2,5,6])
+  var a4 = initializeFromArray(SharedUint8ClampedArray, [3,2,5,6])
   a4.set(a4)
   assertArrayPrefix([3, 2, 5, 6], a4)
 
   // Cases with overlapping backing store but different element sizes.
-  var b = new ArrayBuffer(4)
-  var a5 = new Int16Array(b)
-  var a50 = new Int8Array(b)
-  var a51 = new Int8Array(b, 0, 2)
-  var a52 = new Int8Array(b, 1, 2)
-  var a53 = new Int8Array(b, 2, 2)
+  var b = new SharedArrayBuffer(4)
+  var a5 = new SharedInt16Array(b)
+  var a50 = new SharedInt8Array(b)
+  var a51 = new SharedInt8Array(b, 0, 2)
+  var a52 = new SharedInt8Array(b, 1, 2)
+  var a53 = new SharedInt8Array(b, 2, 2)
 
   a5.set([0x5050, 0x0a0a])
   assertArrayPrefix([0x50, 0x50, 0x0a, 0x0a], a50)
   assertArrayPrefix([0x50, 0x50], a51)
   assertArrayPrefix([0x50, 0x0a], a52)
   assertArrayPrefix([0x0a, 0x0a], a53)
 
   a50.set([0x50, 0x50, 0x0a, 0x0a])
   a51.set(a5)
   assertArrayPrefix([0x50, 0x0a, 0x0a, 0x0a], a50)
@@ skipping 12 matching lines @@
 
   a50.set([0x50, 0x51, 0x0a, 0x0b])
   a5.set(a52)
   assertArrayPrefix([0x0051, 0x000a], a5)
 
   a50.set([0x50, 0x51, 0x0a, 0x0b])
   a5.set(a53)
   assertArrayPrefix([0x000a, 0x000b], a5)
 
   // Mixed types of same size.
-  var a61 = new Float32Array([1.2, 12.3])
-  var a62 = new Int32Array(2)
+  var a61 = initializeFromArray(SharedFloat32Array, [1.2, 12.3])
+  var a62 = new SharedInt32Array(2)
   a62.set(a61)
   assertArrayPrefix([1, 12], a62)
   a61.set(a62)
   assertArrayPrefix([1, 12], a61)
 
   // Invalid source
-  var a = new Uint16Array(50);
+  var a = new SharedUint16Array(50);
   var expected = [];
   for (i = 0; i < 50; i++) {
     a[i] = i;
     expected.push(i);
   }
   a.set({});
   assertArrayPrefix(expected, a);
   assertThrows(function() { a.set.call({}) }, TypeError);
   assertThrows(function() { a.set.call([]) }, TypeError);
 
   assertThrows(function() { a.set(0); }, TypeError);
   assertThrows(function() { a.set(0, 1); }, TypeError);
+
+  // Setting SharedTypedArrays from TypedArrays or vice versa.
+  var a71 = new SharedInt16Array(15);
+  var a72 = new Int16Array(15);
+  assertThrows(function(){ a71.set(a72) }, TypeError);
+  assertThrows(function(){ a72.set(a71) }, TypeError);
 }
 
 TestTypedArraySet();
 
 function TestTypedArraysWithIllegalIndices() {
-  var a = new Int32Array(100);
+  var a = new SharedInt32Array(100);
 
   a[-10] = 10;
   assertEquals(undefined, a[-10]);
   a["-10"] = 10;
   assertEquals(undefined, a["-10"]);
 
   var s = "    -10";
   a[s] = 10;
   assertEquals(10, a[s]);
   var s1 = "    -10   ";
@@ skipping 28 matching lines @@
   a[x] = 5;
   a[y] = 27;
   assertEquals(27, a[x]);
   assertEquals(27, a[y]);
 }
 
 TestTypedArraysWithIllegalIndices();
 
 function TestTypedArraysWithIllegalIndicesStrict() {
   'use strict';
-  var a = new Int32Array(100);
+  var a = new SharedInt32Array(100);
 
   a[-10] = 10;
   assertEquals(undefined, a[-10]);
   a["-10"] = 10;
   assertEquals(undefined, a["-10"]);
 
   var s = "    -10";
   a[s] = 10;
   assertEquals(10, a[s]);
   var s1 = "    -10   ";
@@ skipping 26 matching lines @@
   assertEquals(Infinity, 1/x);
   assertEquals(-Infinity, 1/y);
   a[x] = 5;
   a[y] = 27;
   assertEquals(27, a[x]);
   assertEquals(27, a[y]);
 }
 
 TestTypedArraysWithIllegalIndicesStrict();
 
-// DataView
-function TestDataViewConstructor() {
-  var ab = new ArrayBuffer(256);
-
-  var d1 = new DataView(ab, 1, 255);
-  assertTrue(ArrayBuffer.isView(d1));
-  assertSame(ab, d1.buffer);
-  assertSame(1, d1.byteOffset);
-  assertSame(255, d1.byteLength);
-
-  var d2 = new DataView(ab, 2);
-  assertSame(ab, d2.buffer);
-  assertSame(2, d2.byteOffset);
-  assertSame(254, d2.byteLength);
-
-  var d3 = new DataView(ab);
-  assertSame(ab, d3.buffer);
-  assertSame(0, d3.byteOffset);
-  assertSame(256, d3.byteLength);
-
-  var d3a = new DataView(ab, 1, 0);
-  assertSame(ab, d3a.buffer);
-  assertSame(1, d3a.byteOffset);
-  assertSame(0, d3a.byteLength);
-
-  var d3b = new DataView(ab, 256, 0);
-  assertSame(ab, d3b.buffer);
-  assertSame(256, d3b.byteOffset);
-  assertSame(0, d3b.byteLength);
-
-  var d3c = new DataView(ab, 256);
-  assertSame(ab, d3c.buffer);
-  assertSame(256, d3c.byteOffset);
-  assertSame(0, d3c.byteLength);
-
-  var d4 = new DataView(ab, 1, 3.1415926);
-  assertSame(ab, d4.buffer);
-  assertSame(1, d4.byteOffset);
-  assertSame(3, d4.byteLength);
-
-
-  // error cases
-  assertThrows(function() { new DataView(ab, -1); }, RangeError);
-  assertThrows(function() { new DataView(ab, 1, -1); }, RangeError);
-  assertThrows(function() { new DataView(); }, TypeError);
-  assertThrows(function() { new DataView([]); }, TypeError);
-  assertThrows(function() { new DataView(ab, 257); }, RangeError);
-  assertThrows(function() { new DataView(ab, 1, 1024); }, RangeError);
-}
-
-TestDataViewConstructor();
-
-function TestDataViewPropertyTypeChecks() {
-  var a = new DataView(new ArrayBuffer(10));
-  function CheckProperty(name) {
-    var d = Object.getOwnPropertyDescriptor(DataView.prototype, name);
-    var o = {}
-    assertThrows(function() {d.get.call(o);}, TypeError);
-    d.get.call(a); // shouldn't throw
-  }
-
-  CheckProperty("buffer");
-  CheckProperty("byteOffset");
-  CheckProperty("byteLength");
-}
-
-
-TestDataViewPropertyTypeChecks();
-
-
-function TestDataViewToStringTag() {
-  var a = new DataView(new ArrayBuffer(10));
-  assertEquals("[object DataView]", Object.prototype.toString.call(a));
-  var desc = Object.getOwnPropertyDescriptor(
-      DataView.prototype, Symbol.toStringTag);
-  assertTrue(desc.configurable);
-  assertFalse(desc.enumerable);
-  assertFalse(desc.writable);
-  assertEquals("DataView", desc.value);
-}
-
-
 // General tests for properties
 
 // Test property attribute [[Enumerable]]
 function TestEnumerable(func, obj) {
   function props(x) {
     var array = [];
     for (var p in x) array.push(p);
     return array.sort();
   }
   assertArrayEquals([], props(func));
   assertArrayEquals([], props(func.prototype));
   if (obj)
     assertArrayEquals([], props(obj));
 }
-TestEnumerable(ArrayBuffer, new ArrayBuffer());
+TestEnumerable(ArrayBuffer, new SharedArrayBuffer());
 for(i = 0; i < typedArrayConstructors.length; i++) {
   TestEnumerable(typedArrayConstructors[i]);
 }
-TestEnumerable(DataView, new DataView(new ArrayBuffer()));
 
 // Test arbitrary properties on ArrayBuffer
 function TestArbitrary(m) {
   function TestProperty(map, property, value) {
     map[property] = value;
     assertEquals(value, map[property]);
   }
   for (var i = 0; i < 20; i++) {
     TestProperty(m, 'key' + i, 'val' + i);
     TestProperty(m, 'foo' + i, 'bar' + i);
   }
 }
-TestArbitrary(new ArrayBuffer(256));
+TestArbitrary(new SharedArrayBuffer(256));
 for(i = 0; i < typedArrayConstructors.length; i++) {
   TestArbitrary(new typedArrayConstructors[i](10));
 }
-TestArbitrary(new DataView(new ArrayBuffer(256)));
-
 
 // Test direct constructor call
-assertThrows(function() { ArrayBuffer(); }, TypeError);
-assertThrows(function() { DataView(new ArrayBuffer()); }, TypeError);
+assertThrows(function() { SharedArrayBuffer(); }, TypeError);
+for(i = 0; i < typedArrayConstructors.length; i++) {
+  assertThrows(function(i) { typedArrayConstructors[i](); }.bind(this, i),
+               TypeError);
+}