Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 1 | // Copyright 2015 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 |
| 6 | |
| 7 | // Test that debug-evaluate can find the correct this value for an arrow |
| 8 | // function, if "this" is referenced within the arrow function scope. |
| 9 | |
| 10 | Debug = debug.Debug |
| 11 | |
| 12 | var break_count = 0; |
| 13 | var exception = null; |
| 14 | |
| 15 | function listener(event, exec_state, event_data, data) { |
| 16 | if (event != Debug.DebugEvent.Break) return; |
| 17 | try { |
| 18 | for (var i = 0; i < exec_state.frameCount() - 1; i++) { |
| 19 | var frame = exec_state.frame(i); |
| 20 | var this_value = frame.evaluate("this").value(); |
| 21 | var expected = frame.sourceLineText().match(/\/\/ (.*$)/)[1]; |
| 22 | print(expected, this_value, frame.sourceLineText()); |
| 23 | assertEquals(String(expected), String(this_value)); |
| 24 | } |
| 25 | break_count++; |
| 26 | } catch (e) { |
| 27 | exception = e; |
| 28 | print(e + e.stack); |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | // Context-allocated receiver. |
| 33 | function f() { |
| 34 | debugger; // foo |
| 35 | return () => { |
| 36 | debugger; // foo |
| 37 | with ({}) { |
| 38 | return () => { |
| 39 | debugger; // foo |
| 40 | try { |
| 41 | throw new Error(); |
| 42 | } catch (e) { |
| 43 | return () => { |
| 44 | (() => this); // bind this. |
| 45 | debugger; // foo |
| 46 | return () => { |
| 47 | debugger; // undefined |
| 48 | return g.call("goo"); // undefined |
| 49 | } |
| 50 | }; |
| 51 | } |
| 52 | }; |
| 53 | } |
| 54 | }; |
| 55 | } |
| 56 | |
| 57 | // Stack-allocated receiver. |
| 58 | function g() { |
| 59 | debugger; // goo |
| 60 | return () => { |
| 61 | debugger; // undefined |
| 62 | with ({}) { |
| 63 | return () => { |
| 64 | debugger; // undefined |
| 65 | try { |
| 66 | throw new Error(); |
| 67 | } catch (e) { |
| 68 | return () => { |
| 69 | debugger; // undefined |
| 70 | return f.call("foo"); // undefined |
| 71 | }; |
| 72 | } |
| 73 | }; |
| 74 | } |
| 75 | }; |
| 76 | } |
| 77 | |
| 78 | Debug.setListener(listener); |
| 79 | |
| 80 | var h = f.call("foo"); |
| 81 | for (var i = 0; i < 20; i++) h = h(); |
| 82 | var h = g.call("goo"); |
| 83 | for (var i = 0; i < 20; i++) h = h(); |
| 84 | |
| 85 | function x() { |
| 86 | (() => this); // bind this. |
| 87 | function y() { |
| 88 | (() => { |
| 89 | (() => this); // bind this. |
| 90 | debugger; // Y |
| 91 | })(); // Y |
| 92 | } |
| 93 | y.call("Y"); // X |
| 94 | } |
| 95 | x.call("X"); |
| 96 | |
| 97 | function u() { |
| 98 | (() => this); |
| 99 | function v() { |
| 100 | (() => { |
| 101 | debugger; // undefined |
| 102 | })(); // V |
| 103 | } |
| 104 | v.call("V"); // U |
| 105 | } |
| 106 | u.call("U"); |
| 107 | |
| 108 | (() => { |
| 109 | (() => this); |
| 110 | debugger; // [object global] |
| 111 | })(); |
| 112 | |
| 113 | Debug.setListener(null); |
| 114 | |
| 115 | assertEquals(55, break_count); |
| 116 | assertNull(exception); |