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| 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 --no-analyze-environment-liveness | |
| 6 | |
| 7 // Test that debug-evaluate only resolves variables that are used by | |
| 8 // the function inside which we debug-evaluate. This is to avoid | |
| 9 // incorrect variable resolution when a context-allocated variable is | |
| 10 // shadowed by a stack-allocated variable. | |
| 11 | |
| 12 Debug = debug.Debug | |
| 13 | |
| 14 var exception = null; | |
| 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 value; | |
| 21 try { | |
| 22 value = frame.evaluate("x").value(); | |
| 23 } catch (e) { | |
| 24 value = e.name; | |
| 25 } | |
| 26 print(frame.sourceLineText()); | |
| 27 var expected = frame.sourceLineText().match(/\/\/ (.*$)/)[1]; | |
| 28 assertEquals(String(expected), String(value)); | |
| 29 } | |
| 30 assertEquals("[object global]", | |
| 31 String(exec_state.frame(0).evaluate("this").value())); | |
| 32 assertEquals("y", exec_state.frame(0).evaluate("y").value()); | |
| 33 assertEquals("a", exec_state.frame(0).evaluate("a").value()); | |
| 34 exec_state.frame(0).evaluate("a = 'A'"); | |
| 35 assertThrows(() => exec_state.frame(0).evaluate("z"), ReferenceError); | |
| 36 } catch (e) { | |
| 37 exception = e; | |
| 38 print(e + e.stack); | |
| 39 } | |
| 40 } | |
| 41 | |
| 42 Debug.setListener(listener); | |
| 43 | |
| 44 var a = "a"; | |
| 45 (function() { | |
| 46 var x = 1; // context allocate x | |
| 47 (() => x); | |
| 48 var y = "y"; | |
| 49 var z = "z"; | |
| 50 (function() { | |
| 51 var x = 2; // stack allocate shadowing x | |
| 52 (function() { | |
| 53 y; // access y | |
| 54 debugger; // ReferenceError | |
| 55 })(); // 2 | |
| 56 })(); // 1 | |
| 57 return y; | |
| 58 })(); | |
| 59 | |
| 60 assertEquals("A", a); | |
| 61 a = "a"; | |
| 62 | |
| 63 (function() { | |
| 64 var x = 1; // context allocate x | |
| 65 (() => x); | |
| 66 var y = "y"; | |
| 67 var z = "z"; | |
| 68 (function() { | |
| 69 var x = 2; // stack allocate shadowing x | |
| 70 (() => { | |
| 71 y; | |
| 72 a; | |
| 73 this; // context allocate receiver | |
| 74 debugger; // ReferenceError | |
| 75 })(); // 2 | |
| 76 })(); // 1 | |
| 77 return y; | |
| 78 })(); | |
| 79 | |
| 80 assertEquals("A", a); | |
| 81 | |
| 82 Debug.setListener(null); | |
| 83 assertNull(exception); | |
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