Zoltan Herczeg df92c86ecf
Implement realm object and support realms for built-ins and JS functions (#4354)
- Type for realm objects is introduced (ecma_global_object_t)
- Realm reference is added to built-in objects and ECMAScript functions
- Resolving built-ins, global environments, and scopes require realm object
- Unnecessary global object accesses are removed from the code

Missing: external functions and static snapshot functions have no realm reference

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2020-12-08 14:36:36 +01:00

49 lines
1.3 KiB
JavaScript

// Copyright JS Foundation and other contributors, http://js.foundation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Test1: realm cannot be gc-ed until it is referenced
function f1() {
var ev = createRealm().eval
gc()
try {
ev("5 +")
} catch (e) {
assert(e instanceof ev("this").SyntaxError)
assert(!(e instanceof SyntaxError))
}
}
f1()
// Test2: built-ins cannot be gc-ed until the realm exists
function f2() {
var realm = createRealm()
var str = new realm.String("A");
// Assign a property to String.prototype
Object.getPrototypeOf(str).myProperty = "XY"
str = null
// No reference to String.prototype
gc()
str = new realm.String("A")
assert(Object.getPrototypeOf(str).myProperty === "XY")
assert(realm.String.prototype.myProperty === "XY")
}
f2()