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PR-URL: https://github.com/nodejs/node/pull/44741 Fixes: https://github.com/nodejs/node/issues/44650 Fixes: https://github.com/nodejs/node/issues/37472 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
46 lines
1.5 KiB
JavaScript
46 lines
1.5 KiB
JavaScript
// Copyright 2020 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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var frame;
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Debug.setListener(function (event, exec_state, event_data, data) {
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if (event == Debug.DebugEvent.Break) {
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frame = exec_state.frame(0);
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// Try changing the value, which hasn't yet been initialized.
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assertEquals(3, frame.evaluate("result = 3").value());
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assertEquals(3, frame.evaluate("result").value());
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}
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});
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function makeCounter() {
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// The debug-evaluate should be able to set this to 3. This was fixed with
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// https://crbug.com/1246907 which delays debug breaks triggered by stack
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// checks until the function context is properly set up.
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assertEquals(3, result);
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var result = 0;
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// Regardless of how `result` is allocated, it should now be initialized.
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assertEquals(0, result);
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// Close over `result` to cause it to be heap-allocated.
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return () => ++result;
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}
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// Break on entry to a function which includes heap-allocated variables.
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%ScheduleBreak();
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makeCounter();
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// Check the frame state which was collected during the breakpoint.
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assertEquals(1, frame.localCount());
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assertEquals('result', frame.localName(0));
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assertEquals(undefined, frame.localValue(0).value());
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assertEquals(3, frame.scopeCount());
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assertEquals(debug.ScopeType.Local, frame.scope(0).scopeType());
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assertEquals(debug.ScopeType.Script, frame.scope(1).scopeType());
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assertEquals(debug.ScopeType.Global, frame.scope(2).scopeType());
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