setters-on-elements.js 5.56 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
// Copyright 2011 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.

28
// Flags: --allow-natives-syntax --noalways-opt --opt
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

// It's nice to run this in other browsers too.
var standalone = false;
if (standalone) {
  assertTrue = function(val) {
    if (val != true) {
      print("FAILURE");
    }
  }

  assertFalse = function(val) {
    if (val != false) {
      print("FAILURE");
    }
  }

  assertEquals = function(expected, val) {
    if (expected !== val) {
      print("FAILURE");
    }
  }

  empty_func = function(name) { }
  assertUnoptimized = empty_func;
  assertOptimized = empty_func;

  optimize = empty_func;
  clearFunctionTypeFeedback = empty_func;
  deoptimizeFunction = empty_func;
58
  prepareForOptimize = empty_func;
59 60 61 62 63
} else {
  optimize = function(name) {
    %OptimizeFunctionOnNextCall(name);
  }
  clearFunctionTypeFeedback = function(name) {
64
    %ClearFunctionFeedback(name);
65 66 67 68
  }
  deoptimizeFunction = function(name) {
    %DeoptimizeFunction(name);
  }
69 70 71
  prepareForOptimize = function(name) {
    %PrepareFunctionForOptimization(name);
  }
72 73 74 75 76 77 78 79 80 81 82
}

function base_setter_test(create_func, index, store_value) {
  var calls = 0;

  // Testcase: setter in prototype chain
  foo = function(a) { a[index] = store_value; }
  var a = create_func();
  var ap = [];
  ap.__defineSetter__(index, function() { calls++; });

83
  prepareForOptimize(foo);
84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
  foo(a);
  foo(a);
  foo(a);
  delete a[index];

  assertEquals(0, calls);
  a.__proto__ = ap;
  foo(a);
  assertEquals(1, calls);
  optimize(foo);
  foo(a);
  assertEquals(2, calls);
  assertOptimized(foo);

  // Testcase: setter added on prototype chain object already in place.
  clearFunctionTypeFeedback(foo);
  deoptimizeFunction(foo);
  clearFunctionTypeFeedback(foo);
  calls = 0;
  a = create_func();
  var apap = [];
  a.__proto__ = apap;
  foo(a);
  foo(a);
  foo(a);
  delete a[index];
  apap.__defineSetter__(index, function() { calls++; });
  foo(a);
  foo(a);
  foo(a);
  assertEquals(3, calls);

  // Testcase: setter "deep" in prototype chain.
  clearFunctionTypeFeedback(foo);
  deoptimizeFunction(foo);
  clearFunctionTypeFeedback(foo);
  calls = 0;

  a = create_func();
  var ap2 = [];
  a.__proto__ = ap2;
  foo(a);
  foo(a);
  foo(a);
  delete a[index];

  assertEquals(0, calls);

  ap2.__proto__ = ap;  // "sneak" in a callback.
  // The sneak case should be caught by unoptimized code too.
  assertUnoptimized(foo);
  foo(a);
  foo(a);
  foo(a);
  assertEquals(3, calls);

  // Testcase: setter added after optimization (feedback is monomorphic)
  clearFunctionTypeFeedback(foo);
  deoptimizeFunction(foo);
  clearFunctionTypeFeedback(foo);
  calls = 0;

  a = create_func();
  ap2 = [];
  a.__proto__ = ap2;
149
  prepareForOptimize(foo);
150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169
  foo(a);
  foo(a);
  foo(a);
  optimize(foo);
  foo(a);
  assertOptimized(foo);
  delete a[index];
  ap2.__proto__ = ap;
  foo(a);
  assertUnoptimized(foo);  // map shape change should deopt foo.
  assertEquals(1, calls);

  // Testcase: adding additional setters to a prototype chain that already has
  // one shouldn't deopt anything. (ie, we aren't changing the map shape).
  clearFunctionTypeFeedback(foo);
  calls = 0;

  a = create_func();
  a.__proto__ = ap2;
  bar = function(a) { a[index+1] = store_value; }
170
  prepareForOptimize(bar);
171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197
  bar(a);
  bar(a);
  bar(a);  // store should be generic
  optimize(bar);
  bar(a);
  assertOptimized(bar);
  assertEquals(0, calls);
  delete a[index+1];
  ap2.__defineSetter__(index+1, function() { calls++; });
  bar(a);
  assertOptimized(bar);
  assertEquals(1, calls);
}

// Verify that map transitions don't confuse us.
create_func_smi = function() { return [,,,,,,5]; }
create_func_double = function() { return [0,,3.2,,,,5.5]; }
create_func_fast = function() { return [,,,,,,true]; }
create_func_dictionary = function() { var a = []; a.length = 100000; return a; }

var cf = [create_func_smi,
          create_func_double,
          create_func_fast,
          create_func_dictionary];

var values = [3, 3.5, true];

198 199
for(var c = 0; c < cf.length; c++) {
  for(var s = 0; s < values.length; s++) {
200 201 202 203
    base_setter_test(cf[c], 0, values[s]);
    base_setter_test(cf[c], 1, values[s]);
  }
}