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// Copyright 2015 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: --strong-mode --allow-natives-syntax
function getSloppyArguments() {
return arguments;
}
function getObjects() {
"use strict";
return [
{},
Object(""),
[],
(function(){}),
(class Foo {}),
getSloppyArguments(),
arguments,
new Date(),
// TODO(conradw): uncomment once Object.defineProperty is fixed.
// new Uint32Array(0)
];
}
function readFromObjectSloppy(o) {
return o.foo;
}
function readFromObjectKeyedSloppy(o) {
return o["foo"];
}
function readFromObjectKeyedVarSloppy(o) {
var a = "foo";
return o[a];
}
function readFromObjectKeyedComputedSloppy(o) {
var a = "o";
return o["fo" + a];
}
function readFromObjectStrong(o) {
"use strong";
return o.foo;
}
function readFromObjectKeyedStrong(o) {
"use strong";
return o["foo"];
}
function readFromObjectKeyedLetStrong(o) {
"use strong";
let a = "foo";
return o[a];
}
function readFromObjectKeyedComputedStrong(o) {
"use strong";
let a = "o";
return o["fo" + a];
}
function getDescs(x) {
return [
{value: x},
{configurable: true, enumerable: true, writable: true, value: x},
{configurable: true, enumerable: true, get: (function() {return x}) },
];
}
function assertStrongSemantics(func, object) {
%DeoptimizeFunction(func);
%ClearFunctionTypeFeedback(func);
assertThrows(function(){func(object)}, TypeError);
assertThrows(function(){func(object)}, TypeError);
assertThrows(function(){func(object)}, TypeError);
%OptimizeFunctionOnNextCall(func);
assertThrows(function(){func(object)}, TypeError);
%DeoptimizeFunction(func);
assertThrows(function(){func(object)}, TypeError);
}
function assertSloppySemantics(func, object) {
%DeoptimizeFunction(func);
%ClearFunctionTypeFeedback(func);
assertDoesNotThrow(function(){func(object)});
assertDoesNotThrow(function(){func(object)});
assertDoesNotThrow(function(){func(object)});
%OptimizeFunctionOnNextCall(func);
assertDoesNotThrow(function(){func(object)});
%DeoptimizeFunction(func);
assertDoesNotThrow(function(){func(object)});
}
(function () {
"use strict";
let goodKeys = [
"foo"
]
let badKeys = [
"bar",
"1",
"100001",
"3000000001",
"5000000001"
];
let values = [
"string",
1,
100001,
30000000001,
50000000001,
NaN,
{},
undefined
];
let badAccessorDescs = [
{ set: (function(){}) },
{ configurable: true, enumerable: true, set: (function(){}) }
];
let readSloppy = [
readFromObjectSloppy,
readFromObjectKeyedSloppy,
readFromObjectKeyedVarSloppy,
readFromObjectKeyedComputedSloppy
];
let readStrong = [
readFromObjectStrong,
readFromObjectKeyedStrong,
readFromObjectKeyedLetStrong,
readFromObjectKeyedComputedStrong
];
let dummyProto = {};
for (let key of goodKeys) {
Object.defineProperty(dummyProto, key, { value: undefined });
}
// After altering the backing store, accessing a missing property should still
// throw.
for (let key of badKeys) {
for (let value of values) {
for (let desc of getDescs(value)) {
for (let object of getObjects()) {
Object.defineProperty(object, key, desc);
for (let func of readStrong) {
assertStrongSemantics(func, object);
}
for (let func of readSloppy) {
assertSloppySemantics(func, object);
}
// Accessing a property which is on the prototype chain of the object
// should not throw.
object.__proto__ = dummyProto;
for (let key of goodKeys) {
for (let func of readStrong.concat(readSloppy)) {
assertSloppySemantics(func, object);
}
}
}
}
}
}
})();
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