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| 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are |
| 4 // met: |
| 5 // |
| 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided |
| 11 // with the distribution. |
| 12 // * Neither the name of Google Inc. nor the names of its |
| 13 // contributors may be used to endorse or promote products derived |
| 14 // from this software without specific prior written permission. |
| 15 // |
| 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 |
| 28 // Flags: --expose-debug-as debug |
| 29 |
| 30 Debug = debug.Debug |
| 31 |
| 32 listenerComplete = false; |
| 33 exception = false; |
| 34 |
| 35 // var0: init after break point, changed by debug eval. |
| 36 // const0: init before break point, changed by debug eval. |
| 37 // const1: init after break point, materialized but untouched by debug eval. |
| 38 // const2: init after break point, materialized and changed by debug eval. |
| 39 // const3: context allocated const, init before break point, changed by eval. |
| 40 function f() { |
| 41 var var1 = 21; |
| 42 const const3 = 3; |
| 43 |
| 44 function g() { |
| 45 const const0 = 0; |
| 46 assertEquals(undefined, const1); |
| 47 assertEquals(undefined, const2); |
| 48 assertEquals(3, const3); |
| 49 assertEquals(21, var1); |
| 50 |
| 51 debugger; // Break point. |
| 52 |
| 53 assertEquals(30, var0); |
| 54 // TODO(yangguo): debug evaluate should not be able to alter |
| 55 // stack-allocated const values |
| 56 // assertEquals(0, const0); |
| 57 assertEquals(undefined, const1); |
| 58 assertEquals(undefined, const2); |
| 59 var var0 = 20; |
| 60 const const1 = 1; |
| 61 const const2 = 2; |
| 62 assertEquals(20, var0); |
| 63 assertEquals(1, const1); |
| 64 assertEquals(2, const2); |
| 65 } |
| 66 |
| 67 g(); |
| 68 |
| 69 assertEquals(31, var1); |
| 70 assertEquals(3, const3); |
| 71 } |
| 72 |
| 73 |
| 74 function listener(event, exec_state, event_data, data) { |
| 75 if (event != Debug.DebugEvent.Break) return; |
| 76 try { |
| 77 var frame = exec_state.frame(0); |
| 78 var evaluate = function(something) { |
| 79 return frame.evaluate(something).value() |
| 80 } |
| 81 |
| 82 var count = frame.localCount(); |
| 83 assertEquals(4, count); |
| 84 var expectation = { "const0" : 0, |
| 85 "const1" : undefined, |
| 86 "const2" : undefined, |
| 87 "const3" : 3, |
| 88 "var0" : undefined, |
| 89 "var1" : 21 }; |
| 90 for (var i = 0; i < frame.localCount(); ++i) { |
| 91 var name = frame.localName(i); |
| 92 var value = frame.localValue(i).value(); |
| 93 assertEquals(expectation[name], value); |
| 94 } |
| 95 |
| 96 evaluate('const0 = 10'); |
| 97 evaluate('const2 = 12'); |
| 98 evaluate('const3 = 13'); |
| 99 evaluate('var0 = 30'); |
| 100 evaluate('var1 = 31'); |
| 101 |
| 102 // Indicate that all was processed. |
| 103 listenerComplete = true; |
| 104 } catch (e) { |
| 105 exception = e; |
| 106 print("Caught something. " + e + " " + e.stack); |
| 107 }; |
| 108 }; |
| 109 |
| 110 // Run and compile before debugger is active. |
| 111 try { f(); } catch (e) { } |
| 112 |
| 113 Debug.setListener(listener); |
| 114 |
| 115 f(); |
| 116 |
| 117 Debug.setListener(null); |
| 118 |
| 119 assertFalse(exception, "exception in listener") |
| 120 assertTrue(listenerComplete); |
| 121 |
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