07011cc4f0
This replaces Runtime_RunMicrotasks with Runtime_PerformMicrotaskCheckpoint.
RunMicrotasks forcibly runs Microtasks even when the microtasks are suppressed,
and may causes nested Microtasks in a problematic way. E.g. that confuses
v8::MicrotasksScope::IsRunningMicrotasks() and GetEnteredOrMicrotaskContext().
OTOH, PerformMicrotaskCheckpoint() doesn't run cause the failure as it
respects the microtask suppressions.
As all existing tests don't call RunMicrotasks() in the suppressed situation
(like Promise.resolve().then(()=>{%RunMicrotasks();})), this change should
not affect to these tests.
Change-Id: Ib043a0cc8e482e022d375084d65ea98a6f54ef3d
Reviewed-on: https://chromium-review.googlesource.com/c/1360095
Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Taiju Tsuiki <tzik@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58068}
76 lines
1.6 KiB
JavaScript
76 lines
1.6 KiB
JavaScript
// Copyright 2016 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var Debug = debug.Debug;
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function assertEqualsAsync(expected, run, msg) {
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var actual;
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var hadValue = false;
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var hadError = false;
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var promise = run();
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if (typeof promise !== "object" || typeof promise.then !== "function") {
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throw new MjsUnitAssertionError(
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"Expected " + run.toString() +
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" to return a Promise, but it returned " + promise);
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}
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promise.then(function(value) { hadValue = true; actual = value; },
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function(error) { hadError = true; actual = error; });
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assertFalse(hadValue || hadError);
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%PerformMicrotaskCheckpoint();
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if (hadError) throw actual;
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assertTrue(
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hadValue, "Expected '" + run.toString() + "' to produce a value");
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assertEquals(expected, actual, msg);
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}
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var break_count = 0;
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var exception = null;
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function listener(event, exec_state, event_data, data) {
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if (event != Debug.DebugEvent.Break) return;
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try {
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break_count++;
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var line = exec_state.frame(0).sourceLineText();
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print(line);
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assertTrue(line.indexOf(`B${break_count}`) > 0);
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} catch (e) {
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exception = e;
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}
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}
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async function g() {
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setbreaks();
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throw 1; // B1
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}
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async function f() {
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try {
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await g();
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} catch (e) {}
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return 2; // B2
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}
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function setbreaks() {
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Debug.setListener(listener);
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Debug.setBreakPoint(g, 2);
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Debug.setBreakPoint(f, 4);
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}
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f();
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%PerformMicrotaskCheckpoint();
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assertEqualsAsync(2, async () => break_count);
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assertEqualsAsync(null, async () => exception);
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Debug.setListener(null);
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