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// Copyright 2016 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.
Debug = debug.Debug
var exception = null;
var log;
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Exception) return;
try {
var line = exec_state.frame(0).sourceLineText();
var match = /Exception (\w)/.exec(line);
assertNotNull(match);
log.push(match[1]);
} catch (e) {
exception = e;
}
}
async function thrower() {
throw "a"; // Exception a
}
async function caught_throw() {
try {
await thrower();
} catch (e) {
assertEquals("a", e);
}
}
// Caught throw, events on any exception.
log = [];
Debug.setListener(listener);
Debug.setBreakOnException();
caught_throw();
%RunMicrotasks();
Debug.setListener(null);
Debug.clearBreakOnException();
assertEquals(["a"], log);
assertNull(exception);
// Caught throw, events on uncaught exception.
log = [];
Debug.setListener(listener);
Debug.setBreakOnUncaughtException();
caught_throw();
%RunMicrotasks();
Debug.setListener(null);
Debug.clearBreakOnUncaughtException();
assertEquals([], log);
assertNull(exception);
var reject = Promise.reject("b");
async function caught_reject() {
try {
await reject;
} catch (e) {
assertEquals("b", e);
}
}
// Caught reject, events on any exception.
log = [];
Debug.setListener(listener);
Debug.setBreakOnException();
caught_reject();
%RunMicrotasks();
Debug.setListener(null);
Debug.clearBreakOnException();
assertEquals([], log);
assertNull(exception);
// Caught reject, events on uncaught exception.
log = [];
Debug.setListener(listener);
Debug.setBreakOnUncaughtException();
caught_reject();
%RunMicrotasks();
Debug.setListener(null);
Debug.clearBreakOnUncaughtException();
assertEquals([], log);
assertNull(exception);
log = [];
Debug.setListener(listener);
Debug.setBreakOnException();
// "rethrown" uncaught exceptions in return don't cause another event
async function propagate_inner() { return thrower(); }
async function propagate_outer() { return propagate_inner(); }
propagate_outer();
%RunMicrotasks();
assertEquals(["a"], log);
assertNull(exception);
// Also don't propagate if an await interceded
log = [];
async function propagate_await() { await 1; return thrower(); }
async function propagate_await_outer() { return propagate_await(); }
propagate_await_outer();
%RunMicrotasks();
assertEquals(["a"], log);
assertNull(exception);
Debug.clearBreakOnException();
Debug.setBreakOnUncaughtException();
log = [];
Promise.resolve().then(() => Promise.reject()).catch(() => log.push("d")); // Exception c
%RunMicrotasks();
assertEquals(["d"], log);
assertNull(exception);
Debug.clearBreakOnUncaughtException();
Debug.setListener(null);
// If devtools is turned on in the middle, then catch prediction
// could be wrong (here, it mispredicts the exception as caught),
// but shouldn't crash.
log = [];
var resolve;
var turnOnListenerPromise = new Promise(r => resolve = r);
async function confused() {
await turnOnListenerPromise;
throw foo
}
confused();
Promise.resolve().then(() => {
Debug.setListener(listener);
Debug.setBreakOnUncaughtException();
resolve();
});
assertEquals([], log);
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