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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 // Flags: --allow-natives-syntax | 28 // Flags: --allow-natives-syntax |
29 | 29 |
30 // The type feedback oracle had a bug when retrieving the map from an IC | 30 // The type feedback oracle had a bug when retrieving the map from an IC |
31 // starting with a negative lookup. | 31 // starting with a negative lookup. |
32 | 32 |
33 // Create a holder in fast mode. | 33 // Create a holder in fast mode. |
34 var holder = Object.create(null, { | 34 var holder = Object.create({}, { |
35 holderMethod: {value: function() {}} | 35 holderMethod: {value: function() {}} |
36 }); | 36 }); |
37 assertTrue(%HasFastProperties(holder)); | 37 assertTrue(%HasFastProperties(holder)); |
38 | 38 |
| 39 // We assume dict usage for null prototype. |
| 40 var holder = Object.create(null, { |
| 41 holderMethod: {value: function() {}} |
| 42 }); |
| 43 assertFalse(%HasFastProperties(holder)); |
| 44 |
39 // Create a receiver into dictionary mode. | 45 // Create a receiver into dictionary mode. |
40 var receiver = Object.create(holder, { | 46 var receiver = Object.create(holder, { |
41 killMe: {value: 0, configurable: true}, | 47 killMe: {value: 0, configurable: true}, |
42 }); | 48 }); |
43 delete receiver.killMe; | 49 delete receiver.killMe; |
44 assertFalse(%HasFastProperties(receiver)); | 50 assertFalse(%HasFastProperties(receiver)); |
45 | 51 |
46 // The actual function to test, triggering the retrieval of the wrong map. | 52 // The actual function to test, triggering the retrieval of the wrong map. |
47 function callConstantFunctionOnPrototype(obj) { | 53 function callConstantFunctionOnPrototype(obj) { |
48 obj.holderMethod(); | 54 obj.holderMethod(); |
49 } | 55 } |
50 | 56 |
51 callConstantFunctionOnPrototype(receiver); | 57 callConstantFunctionOnPrototype(receiver); |
52 callConstantFunctionOnPrototype(receiver); | 58 callConstantFunctionOnPrototype(receiver); |
53 %OptimizeFunctionOnNextCall(callConstantFunctionOnPrototype); | 59 %OptimizeFunctionOnNextCall(callConstantFunctionOnPrototype); |
54 callConstantFunctionOnPrototype(receiver); | 60 callConstantFunctionOnPrototype(receiver); |
55 | 61 |
56 // Make sure that the function is still optimized. | 62 // Make sure that the function is still optimized. |
57 assertOptimized(callConstantFunctionOnPrototype); | 63 assertOptimized(callConstantFunctionOnPrototype); |
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