v8/test/mjsunit/debug-stack-check-position.js

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// 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 --allow-natives-syntax
var Debug = debug.Debug;
var exception = null;
var loop = true;
function listener(event, exec_state, event_data, data) {
if (event != Debug.DebugEvent.Break) return;
try {
assertTrue(exec_state.frame(0).sourceLineText().indexOf("BREAK") > 0);
} catch (e) {
exception = e;
}
}
function f() { // BREAK
return 1;
}
Debug.setListener(listener);
%ScheduleBreak(); // Break on function entry.
f();
Debug.setListener(null);
assertNull(exception);