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
|
// Copyright 2013 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.
// Flags: --allow-natives-syntax --crankshaft
// The type feedback oracle had a bug when retrieving the map from an IC
// starting with a negative lookup.
// Create a holder in fast mode.
var holder = Object.create({}, {
holderMethod: {value: function() {}}
});
assertTrue(%HasFastProperties(holder));
// We assume dict usage for null prototype.
var holder = Object.create(null, {
holderMethod: {value: function() {}}
});
assertFalse(%HasFastProperties(holder));
// Create a receiver into dictionary mode.
var receiver = Object.create(holder, {
killMe: {value: 0, configurable: true},
});
delete receiver.killMe;
assertFalse(%HasFastProperties(receiver));
// The actual function to test, triggering the retrieval of the wrong map.
function callConstantFunctionOnPrototype(obj) {
obj.holderMethod();
}
callConstantFunctionOnPrototype(receiver);
callConstantFunctionOnPrototype(receiver);
%OptimizeFunctionOnNextCall(callConstantFunctionOnPrototype);
callConstantFunctionOnPrototype(receiver);
// Make sure that the function is still optimized.
assertOptimized(callConstantFunctionOnPrototype);
|
