CSE2410 Fall 2014 Bounce

// Copyright 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.

// This test attempts to test the inline caching for keyed access.

// ----------------------------------------------------------------------

// Prototype accessor.

// ----------------------------------------------------------------------

var runTest = function() {

  var initial_P = 'prototype';

  var P = initial_P;

  var H = 'hasOwnProperty';

  var f = function() {};

  function prototypeTest(change_index) {

    for (var i = 0; i < 10; i++) {

      var property = f[P];

      if (i <= change_index) {

        assertEquals(f.prototype, property);

      } else {

        assertEquals(f.hasOwnProperty, property);

      }

      if (i == change_index) P = H;

    }

    P = initial_P;

  }

  for (var i = 0; i < 10; i++) prototypeTest(i);

  f.prototype = 43;

  for (var i = 0; i < 10; i++) prototypeTest(i);

}

runTest();

// ----------------------------------------------------------------------

// Array length accessor.

// ----------------------------------------------------------------------

runTest = function() {

  var initial_L = 'length';

  var L = initial_L;

  var zero = '0';

  var a = new Array(10);

  function arrayLengthTest(change_index) {

    for (var i = 0; i < 10; i++) {

      var l = a[L];

      if (i <= change_index) {

        assertEquals(10, l);

      } else {

        assertEquals(undefined, l);

      }

      if (i == change_index) L = zero;

    }

    L = initial_L;

  }

  for (var i = 0; i < 10; i++) arrayLengthTest(i);

}

runTest();

// ----------------------------------------------------------------------

// String length accessor.

// ----------------------------------------------------------------------

runTest = function() {

  var initial_L = 'length';

  var L = initial_L;

  var zero = '0';

  var s = "asdf"

  function stringLengthTest(change_index) {

    for (var i = 0; i < 10; i++) {

      var l = s[L];

      if (i <= change_index) {

        assertEquals(4, l);

      } else {

        assertEquals('a', l);

      }

      if (i == change_index) L = zero;

    }

    L = initial_L;

  }

  for (var i = 0; i < 10; i++) stringLengthTest(i);

}

runTest();

// ----------------------------------------------------------------------

// Field access.

// ----------------------------------------------------------------------

runTest = function() {

  var o = { x: 42, y: 43 }

  var initial_X = 'x';

  var X = initial_X;

  var Y = 'y';

  function fieldTest(change_index) {

    for (var i = 0; i < 10; i++) {

      var property = o[X];

      if (i <= change_index) {

        assertEquals(42, property);

      } else {

        assertEquals(43, property);

      }

      if (i == change_index) X = Y;

    }

    X = initial_X;

  };

  for (var i = 0; i < 10; i++) fieldTest(i);

}

runTest();

// ----------------------------------------------------------------------

// Constant function access.

// ----------------------------------------------------------------------

runTest = function() {

  function fun() { };

  var o = new Object();

  o.f = fun;

  o.x = 42;

  var initial_F = 'f';

  var F = initial_F;

  var X = 'x'

  function constantFunctionTest(change_index) {

    for (var i = 0; i < 10; i++) {

      var property = o[F];

      if (i <= change_index) {

        assertEquals(fun, property);

      } else {

        assertEquals(42, property);

      }

      if (i == change_index) F = X;

    }

    F = initial_F;

  };

  for (var i = 0; i < 10; i++) constantFunctionTest(i);

}

runTest();

// ----------------------------------------------------------------------

// Keyed store field.

// ----------------------------------------------------------------------

runTest = function() {

  var o = { x: 42, y: 43 }

  var initial_X = 'x';

  var X = initial_X;

  var Y = 'y';

  function fieldTest(change_index) {

    for (var i = 0; i < 10; i++) {

      o[X] = X;

      var property = o[X];

      if (i <= change_index) {

        assertEquals('x', property);

      } else {

        assertEquals('y', property);

      }

      if (i == change_index) X = Y;

    }

    X = initial_X;

  };

  for (var i = 0; i < 10; i++) fieldTest(i);

}

runTest();