46 lines
981 B
JavaScript
46 lines
981 B
JavaScript
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// 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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// Flags: --expose-debug-as debug --harmony-tailcalls
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"use strict";
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var Debug = debug.Debug
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var exception = null;
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var breaks = 0;
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function f(x) {
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if (x > 0) {
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return f(x - 1); // Tail call
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}
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debugger; // Break 0
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}
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function g(x) {
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return f(x); // Tail call
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}
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function h(x) {
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g(x); // Not tail call
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} // Break 1
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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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assertTrue(event_data.sourceLineText().indexOf(`Break ${breaks++}`) > 0);
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exec_state.prepareStep(Debug.StepAction.StepOut);
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} catch (e) {
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exception = e;
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};
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};
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Debug.setListener(listener);
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h(3);
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Debug.setListener(null); // Break 2
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assertNull(exception);
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assertEquals(3, breaks);
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