42 lines
1.3 KiB
JavaScript
42 lines
1.3 KiB
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
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Debug = debug.Debug
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var exception = null;
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var break_count = 0;
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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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print(event_data.sourceLineText());
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var column = event_data.sourceColumn();
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assertTrue(event_data.sourceLineText().indexOf(
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`Break ${break_count++}. ${column}.`) > 0);
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exec_state.prepareStep(Debug.StepAction.StepIn);
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} catch (e) {
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print(e + e.stack);
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exception = e;
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}
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};
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function f() {
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var a = 1; // Break 2. 10.
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// This return statement emits no bytecode instruction for the evaluation of
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// the to-be-returned expression. Therefore we cannot set a break location
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// before the statement and a second break location immediately before
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// returning to the caller.
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return a;
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} // Break 3. 0.
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Debug.setListener(listener);
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debugger; // Break 0. 0.
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f(); // Break 1. 0.
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Debug.setListener(null); // Break 4. 0.
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assertNull(exception);
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assertEquals(5, break_count);
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