1// Copyright 2013 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
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11//       with the distribution.
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13//       contributors may be used to endorse or promote products derived
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15//
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17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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27
28// Flags: --allow-natives-syntax
29// Flags: --concurrent-recompilation --block-concurrent-recompilation
30
31if (!%IsConcurrentRecompilationSupported()) {
32  print("Concurrent recompilation is disabled. Skipping this test.");
33  quit();
34}
35
36function f(foo) { return foo.bar(); }
37
38var o = {};
39o.__proto__ = { __proto__: { bar: function() { return 1; } } };
40
41assertEquals(1, f(o));
42assertEquals(1, f(o));
43
44// Mark for concurrent optimization.
45%OptimizeFunctionOnNextCall(f, "concurrent");
46// Kick off recompilation.
47assertEquals(1, f(o));
48// Change the prototype chain after compile graph has been created.
49o.__proto__.__proto__ = { bar: function() { return 2; } };
50// At this point, concurrent recompilation thread has not yet done its job.
51assertUnoptimized(f, "no sync");
52// Let the background thread proceed.
53%UnblockConcurrentRecompilation();
54// Optimization eventually bails out due to map dependency.
55assertUnoptimized(f, "sync");
56assertEquals(2, f(o));
57//Clear type info for stress runs.
58%ClearFunctionTypeFeedback(f);
59