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); 121 122