Commit 3a2174c8 authored by yangguo's avatar yangguo Committed by Commit bot

[debugger] add test case for stepping out from tail calls.

R=ishell@chromium.org

Review URL: https://codereview.chromium.org/1839043002

Cr-Commit-Position: refs/heads/master@{#35193}
parent 489c6f43
// 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.
// Flags: --expose-debug-as debug --harmony-tailcalls
"use strict";
var Debug = debug.Debug
var exception = null;
var breaks = 0;
function f(x) {
if (x > 0) {
return f(x - 1); // Tail call
}
debugger; // Break 0
}
function g(x) {
return f(x); // Tail call
}
function h(x) {
g(x); // Not tail call
} // Break 1
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Break) return;
try {
assertTrue(event_data.sourceLineText().indexOf(`Break ${breaks++}`) > 0);
exec_state.prepareStep(Debug.StepAction.StepOut);
} catch (e) {
exception = e;
};
};
Debug.setListener(listener);
h(3);
Debug.setListener(null); // Break 2
assertNull(exception);
assertEquals(3, breaks);
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