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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 --async-stack-traces
// Basic test with an explicit throw.
(function() {
const realm = Realm.createAllowCrossRealmAccess();
async function one(x) {
await two(x);
}
const two = Realm.eval(realm, `(async function two(x) {
await x;
throw new Error();
})`);
async function test(f) {
try {
await f(new Promise(resolve => setTimeout(resolve)));
assertUnreachable();
} catch (e) {
assertInstanceof(e, Realm.global(realm).Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
%PrepareFunctionForOptimization(one);
%PrepareFunctionForOptimization(two);
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
Realm.dispose(realm);
})());
})();
// Basic test with an implicit throw (via ToNumber on Symbol).
(function() {
const realm = Realm.createAllowCrossRealmAccess();
async function one(x) {
return await two(x);
}
const two = Realm.eval(realm, `(async function two(x) {
await x;
return +Symbol(); // This will raise a TypeError.
})`);
async function test(f) {
try {
await f(new Promise(resolve => setTimeout(resolve)));
assertUnreachable();
} catch (e) {
assertInstanceof(e, Realm.global(realm).TypeError);
assertMatches(/TypeError.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
%PrepareFunctionForOptimization(one);
%PrepareFunctionForOptimization(two);
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
Realm.dispose(realm);
})());
})();
// Basic test with async functions and promises chained via
// Promise.prototype.then(), which should still work following
// the generic chain upwards.
(function() {
const realm = Realm.createAllowCrossRealmAccess();
async function one(x) {
return await two(x).then(x => x);
}
const two = Realm.eval(realm, `(async function two(x) {
await x.then(x => x);
throw new Error();
})`);
async function test(f) {
try {
await f(new Promise(resolve => setTimeout(resolve)));
assertUnreachable();
} catch (e) {
assertInstanceof(e, Realm.global(realm).Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
%PrepareFunctionForOptimization(one);
%PrepareFunctionForOptimization(two);
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
Realm.dispose(realm);
})());
})();
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