| // 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 |
| } |
| |
| %PrepareFunctionForOptimization(foo); |
| |
| foo(); |
| %PerformMicrotaskCheckpoint(); |
| |
| foo(); |
| %PerformMicrotaskCheckpoint(); |
| |
| %OptimizeFunctionOnNextCall(foo); |
| |
| // bar likely gets inlined into foo. |
| foo(); |
| %PerformMicrotaskCheckpoint(); |
| |
| %NeverOptimizeFunction(bar); |
| %PrepareFunctionForOptimization(foo); |
| %OptimizeFunctionOnNextCall(foo); |
| |
| // bar does not get inlined into foo. |
| foo(); |
| %PerformMicrotaskCheckpoint(); |
| |
| assertEquals(0, expected_events); |