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// 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.
// Test exercises code paths for catching exceptions in the promise constructor
// in conjunction with deoptimization.
Debug = debug.Debug;
var expected_events = 4;
function listener(event, exec_state, event_data, data) {
try {
if (event == Debug.DebugEvent.Exception) {
expected_events--;
assertTrue(expected_events >= 0);
assertEquals("uncaught", event_data.exception().message);
assertTrue(event_data.uncaught());
// The frame comes from the Promise.reject call
assertNotNull(/\/\/ EXCEPTION/.exec(event_data.sourceLineText()));
assertTrue(event_data.uncaught());
}
} catch (e) {
%AbortJS(e + "\n" + e.stack);
}
}
Debug.setBreakOnException();
Debug.setListener(listener);
function foo(a,b) {
let P = new Promise((resolve, reject) => { bar(a,b); resolve()})
return P;
}
function bar(a,b) {
%DeoptimizeFunction(foo);
throw new Error("uncaught"); // EXCEPTION
}
foo();
%PerformMicrotaskCheckpoint();
foo();
%PerformMicrotaskCheckpoint();
%OptimizeFunctionOnNextCall(foo);
// bar likely gets inlined into foo.
foo();
%PerformMicrotaskCheckpoint();
%NeverOptimizeFunction(bar);
%OptimizeFunctionOnNextCall(foo);
// bar does not get inlined into foo.
foo();
%PerformMicrotaskCheckpoint();
assertEquals(0, expected_events);
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