a0e9160066
StepFrame is a combination of StepIn/StepOut, e.g. it breaks to the next frame change. This is not part of the public API, but we want to keep it for internal tests. BUG=v8:5530 Review-Url: https://codereview.chromium.org/2514303003 Cr-Commit-Position: refs/heads/master@{#41177}
97 lines
3.2 KiB
JavaScript
97 lines
3.2 KiB
JavaScript
// Copyright 2015 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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// This test ensures that IC learning doesn't interfere with stepping into
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// property accessor. f1()'s ICs are allowed to learn to a monomorphic state,
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// and the breakpoints flooding get() are allowed to expire, then we ensure
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// that we can step into get() again later (when k == 1).
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function f1() {
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for (var k = 0; k < 2; k++) { // Break 1
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var v10 = 0; // Line 2
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for (var i = 0; i < 10; i++) { // Line 3
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var v12 = o.slappy; // Line 4
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var v13 = 3 // Line 5
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} // Line 6
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print("break here"); // Break 3
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} // Line 8
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print("exiting f1"); // Line 9 (dummy break)
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}
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function get() {
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var g0 = 0; // Break 2
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var g1 = 1;
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return 3;
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}
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var o = {};
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Object.defineProperty(o, "slappy", { get : get });
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Debug = debug.Debug;
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var break_count = 0
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var exception = null;
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var bp_f1_line7;
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var bp_f1_line9;
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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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var line = exec_state.frame(0).sourceLineText();
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print(line);
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var match = line.match(/\/\/ Break (\d+)$/);
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assertEquals(2, match.length);
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var match_value = parseInt(match[1]);
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if (break_count >= 0 && break_count < 2) {
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// 0, 1: Keep stepping through frames.
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assertEquals(break_count, match_value);
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exec_state.prepareStep(Debug.StepAction.StepFrame);
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} else if (break_count === 2) {
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// 2: let the code run to a breakpoint we set. The load should
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// go monomorphic.
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assertEquals(break_count, match_value);
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} else if (break_count === 3) {
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// 3: back to frame stepping. Does the monomorphic slappy accessor
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// call still have the ability to break like before?
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assertEquals(break_count, match_value);
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Debug.clearBreakPoint(bp_f1_line7);
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exec_state.prepareStep(Debug.StepAction.StepFrame);
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} else {
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assertEquals(4, break_count);
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assertEquals(2, match_value);
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// Apparently we can still stop in the accessor even though we cleared
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// breakpoints earlier and there was a monomorphic step.
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// Allow running to completion now.
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Debug.clearBreakPoint(bp_f1_line9);
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}
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break_count++;
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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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for (var j = 1; j < 3; j++) {
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break_count = 0;
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Debug.setListener(listener);
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// Breakpoints are added here rather than in the listener because their
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// addition causes a full (clearing) gc that clears type feedback when we
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// want to let it build up. Also, bp_f1_line9 is set simply because if we
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// handled then deleted bp_f1_line7, then the debugger clears DebugInfo from
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// f1 while we are still using it, again, resetting type feedback which is
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// undesirable.
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bp_f1_line7 = Debug.setBreakPoint(f1, 7);
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bp_f1_line9 = Debug.setBreakPoint(f1, 9);
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debugger; // Break 0
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f1();
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Debug.setListener(null);
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assertTrue(break_count === 5);
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}
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assertNull(exception);
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