c0720d28db
BUG=v8:8801 Change-Id: Id5ef6219ba2dca2be0603dd0d45e7b27136836e9 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1587391 Reviewed-by: Mythri Alle <mythria@chromium.org> Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#61085}
59 lines
1.6 KiB
JavaScript
59 lines
1.6 KiB
JavaScript
// Copyright 2014 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: --turbo-filter=g
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// Test that Debug::PrepareForBreakPoints can deal with turbofan code (g)
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// on the stack. Without deoptimization support, we will not be able to
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// replace optimized code for g by unoptimized code with debug break slots.
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// This would cause stepping to fail (V8 issue 3660).
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function f(x) {
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g(x);
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var a = 0; // Break 6
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return a; // Break 7
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} // Break 8
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function g(x) {
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if (x) h();
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var a = 0; // Break 2
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var b = 1; // Break 3
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return a + b; // Break 4
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} // Break 5
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function h() {
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debugger; // Break 0
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} // Break 1
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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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exec_state.prepareStep(Debug.StepAction.StepNext);
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print(exec_state.frame(0).sourceLineText());
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var match = exec_state.frame(0).sourceLineText().match(/Break (\d)/);
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assertNotNull(match);
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assertEquals(break_count++, parseInt(match[1]));
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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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%PrepareFunctionForOptimization(g);
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f(0);
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f(0);
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%OptimizeFunctionOnNextCall(g);
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Debug.setListener(listener);
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f(1);
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Debug.setListener(null); // Break 9
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assertNull(exception);
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assertEquals(10, break_count);
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