v8/test/mjsunit/global-proxy-this.js

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// Copyright 2019 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: --allow-natives-syntax
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
%PrepareFunctionForOptimization(foo);
assertSame(foo(), foo);
%OptimizeFunctionOnNextCall(foo);
assertSame(foo(), foo);
}
// detachGlobal, old map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
%PrepareFunctionForOptimization(foo);
assertSame(foo(), foo);
Realm.detachGlobal(realm);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}
// navigate, old map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
%PrepareFunctionForOptimization(foo);
assertSame(foo(), foo);
Realm.navigate(realm);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}
// detachGlobal, new map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
assertSame(foo(), foo);
Realm.detachGlobal(realm);
%PrepareFunctionForOptimization(foo);
assertThrows(foo);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}
// navigate, new map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
assertSame(foo(), foo);
Realm.navigate(realm);
%PrepareFunctionForOptimization(foo);
assertThrows(foo);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}
// detachGlobal, old and new map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
%PrepareFunctionForOptimization(foo);
assertSame(foo(), foo);
Realm.detachGlobal(realm);
assertThrows(foo);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}
// navigate, old and new map
{
const realm = Realm.createAllowCrossRealmAccess();
const foo = Realm.eval(realm, "function foo() { return this.foo }; foo");
%PrepareFunctionForOptimization(foo);
assertSame(foo(), foo);
Realm.navigate(realm);
assertThrows(foo);
%OptimizeFunctionOnNextCall(foo);
assertThrows(foo);
}