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Issue 2033223003: [debug] implement intuitive semantics for stepping over await call. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: fix arm64 Created 4 years, 6 months ago
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1 // Copyright 2016 the V8 project authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 // Flags: --expose-debug-as debug --allow-natives-syntax --harmony-async-await
6
7 var Debug = debug.Debug;
8 var step_count = 0;
9
10 function listener(event, execState, eventData, data) {
11 if (event != Debug.DebugEvent.Break) return;
12 try {
13 var line = execState.frame(0).sourceLineText();
14 print(line);
15 var [match, expected_count, step] = /\/\/ B(\d) (\w+)$/.exec(line);
16 assertEquals(step_count++, parseInt(expected_count));
17 if (step != "Continue") execState.prepareStep(Debug.StepAction[step]);
18 } catch (e) {
19 print(e, e.stack);
20 quit(1);
21 }
22 }
23
24 Debug.setListener(listener);
25
26 var late_resolve;
27
28 function g() {
29 return new Promise( // B3 StepOut
30 function(res, rej) {
31 late_resolve = res;
32 }
33 );
34 }
35
36 async function f() {
37 var a = 1;
38 debugger; // B0 StepNext
39 a += // B1 StepNext
40 await // B4 StepNext
41 g(); // B2 StepIn
42 return a;
43 }
44
45 f();
46
47 // Starting a new step action at an intermediate break point
48 // means that we will abort the current async step.
49 debugger; // B5 StepNext
50
51 late_resolve(3); // B6 Continue
52
53 %RunMicrotasks();
54
55 assertEquals(7, step_count);
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