v8/test/mjsunit/async-stack-traces.js
Benedikt Meurer b1a9769425 [async] Follow initial promise chains created via Promise#then().
For the --async-stack-traces we can also look through initial parts of
the promise chain that were created by regular Promise#then() calls to
walk up to the first async function frame. This addresses the missing
support for aforementioned example

```js
(async function() {
  await Promise.resolve().then(() =>
    console.log(new Error().stack));
})();
```

which now also works.

Bug: v8:7522
Change-Id: I574943c1fc6ee4a1bd56f208dce78eb7506c5c4f
Reviewed-on: https://chromium-review.googlesource.com/c/1278276
Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Benedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#56613}
2018-10-12 15:49:01 +00:00

302 lines
6.3 KiB
JavaScript

// Copyright 2018 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() {
async function one(x) {
await two(x);
}
async function two(x) {
await x;
throw new Error();
}
async function test(f) {
try {
await f(1);
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test with an implicit throw (via ToNumber on Symbol).
(function() {
async function one(x) {
return await two(x);
}
async function two(x) {
await x;
return +x; // This will raise a TypeError.
}
async function test(f) {
try {
await f(Symbol());
assertUnreachable();
} catch (e) {
assertInstanceof(e, TypeError);
assertMatches(/TypeError.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test with throw in inlined function.
(function() {
function throwError() {
throw new Error();
}
async function one(x) {
return await two(x);
}
async function two(x) {
await x;
return throwError();
}
async function test(f) {
try {
await f(1);
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test with async function inlined into sync function.
(function() {
function callOne(x) {
return one(x);
}
function callTwo(x) {
return two(x);
}
async function one(x) {
return await callTwo(x);
}
async function two(x) {
await x;
throw new Error();
}
async function test(f) {
try {
await f(1);
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
await test(callOne);
await test(callOne);
%OptimizeFunctionOnNextCall(callTwo);
await test(callOne);
%OptimizeFunctionOnNextCall(callOne);
await test(callOne);
})());
})();
// Basic test with async functions and promises chained via
// Promise.prototype.then(), which should still work following
// the generic chain upwards.
(function() {
async function one(x) {
return await two(x).then(x => x);
}
async function two(x) {
await x.then(x => x);
throw new Error();
}
async function test(f) {
try {
await f(Promise.resolve(1));
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async() => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test for async generators called from async
// functions with an explicit throw.
(function() {
async function one(x) {
for await (const y of two(x)) {}
}
async function* two(x) {
await x;
throw new Error();
}
async function test(f) {
try {
await f(1);
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test for async functions called from async
// generators with an explicit throw.
(function() {
async function* one(x) {
await two(x);
}
async function two(x) {
await x;
throw new Error();
}
async function test(f) {
try {
for await (const x of f(1)) {}
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test for async functions called from async
// generators with an explicit throw (with yield).
(function() {
async function* one(x) {
yield two(x);
}
async function two(x) {
await x;
throw new Error();
}
async function test(f) {
try {
for await (const x of f(1)) {}
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();
// Basic test to check that we also follow initial
// promise chains created via Promise#then().
(function() {
async function one(p) {
return await p.then(two);
}
function two() {
throw new Error();
}
async function test(f) {
try {
await f(Promise.resolve());
assertUnreachable();
} catch (e) {
assertInstanceof(e, Error);
assertMatches(/Error.+at two.+at async one.+at async test/ms, e.stack);
}
}
assertPromiseResult((async () => {
await test(one);
await test(one);
%OptimizeFunctionOnNextCall(two);
await test(one);
%OptimizeFunctionOnNextCall(one);
await test(one);
})());
})();