integrity-level-map-update.js 3.23 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102
// Copyright 2019 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.

// Flags: --allow-natives-syntax

(function SealAndReconfigure() {
  function C() { this.x = 1; this.y = 1; Object.seal(this); }

  let c1 = new C();

  c1.x = 0.1;

  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  // The objects c2, c3 and c4 should follow the same transition
  // path that we reconfigured c1 to.
  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));

  c2.x = 0.1;
  c3.x = 0.1;
  c4.x = 0.1;

  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));
})();

(function SealAndReconfigureWithIC() {
  function C() { this.x = 1; this.y = 1; Object.seal(this); }

  let c1 = new C();

  function g(o) {
    o.x = 0.1;
  }

  g(c1);

  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  // The objects c2, c3 and c4 should follow the same transition
  // path that we reconfigured c1 to.
  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));

  g(c2);
  g(c3);
  g(c4);

  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));
})();

(function SealReconfigureAndMigrateWithIC() {
  function C() { this.x = 1; this.y = 1; Object.seal(this); }

  let c1 = new C();
  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  function g(o) {
    o.x = 0.1;
  }

  g(c1);

  // Now c2, c3 and c4 have deprecated maps.
  assertFalse(%HaveSameMap(c1, c2));
  assertFalse(%HaveSameMap(c1, c3));
  assertFalse(%HaveSameMap(c1, c4));

  g(c2);
  g(c3);
  g(c4);

  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));
})();

(function SealReconfigureAndMigrateWithOptCode() {
  function C() { this.x = 1; this.y = 1; Object.seal(this); }

  let c1 = new C();
  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  function g(o) {
    o.x = 0.1;
  }

103
  %PrepareFunctionForOptimization(g);
104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167
  g(c1);
  g(c2);
  g(c3);
  %OptimizeFunctionOnNextCall(g);
  g(c4);

  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));
})();

(function PreventExtensionsAndReconfigure() {
  function C() { this.x = 1; this.y = 1; Object.preventExtensions(this); }

  let c1 = new C();

  function g(o) {
    o.x = 0.1;
  }

  g(c1);

  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  c2.x = 0.1;
  c3.x = 0.1;
  c4.x = 0.1;

  assertTrue(%HaveSameMap(c1, c2));
  assertTrue(%HaveSameMap(c1, c3));
  assertTrue(%HaveSameMap(c1, c4));
})();

(function PreventExtensionsSealAndReconfigure() {
  function C() {
    this.x = 1;
    this.y = 1;
    Object.preventExtensions(this);
    Object.seal(this);
  }

  let c1 = new C();

  function g(o) {
    o.x = 0.1;
  }

  g(c1);

  let c2 = new C();
  let c3 = new C();
  let c4 = new C();

  c2.x = 0.1;
  c3.x = 0.1;
  c4.x = 0.1;

  // Ideally, all the objects would have the same map, but at the moment
  // we shortcut the unnecessary integrity level transitions.
  assertTrue(%HaveSameMap(c2, c3));
  assertTrue(%HaveSameMap(c2, c4));
})();