1 // Copyright 2010 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 // Get the Debug object exposed from the debug context global object. 30 Debug = debug.Debug 31 32 33 function ParsedResponse(json) { 34 this.response_ = eval('(' + json + ')'); 35 this.refs_ = []; 36 if (this.response_.refs) { 37 for (var i = 0; i < this.response_.refs.length; i++) { 38 this.refs_[this.response_.refs[i].handle] = this.response_.refs[i]; 39 } 40 } 41 } 42 43 44 ParsedResponse.prototype.response = function() { 45 return this.response_; 46 } 47 48 49 ParsedResponse.prototype.body = function() { 50 return this.response_.body; 51 } 52 53 54 ParsedResponse.prototype.running = function() { 55 return this.response_.running; 56 } 57 58 59 ParsedResponse.prototype.lookup = function(handle) { 60 return this.refs_[handle]; 61 } 62 63 64 listener_complete = false; 65 exception = false; 66 break_count = 0; 67 expected_return_value = 0; 68 debugger_source_position = 0; 69 70 // Listener which expects to do four steps to reach returning from the function. 71 function listener(event, exec_state, event_data, data) { 72 try { 73 if (event == Debug.DebugEvent.Break) 74 { 75 break_count++; 76 if (break_count < 4) { 77 assertFalse(exec_state.frame(0).isAtReturn()) 78 switch (break_count) { 79 case 1: 80 // Collect the position of the debugger statement. 81 debugger_source_position = exec_state.frame(0).sourcePosition(); 82 break; 83 case 2: 84 // Position now at the if statement. 85 assertEquals(debugger_source_position + 10, 86 exec_state.frame(0).sourcePosition()); 87 break; 88 case 3: 89 // Position now at either of the returns. 90 if (expected_return_value == 1) { 91 assertEquals(debugger_source_position + 19, 92 exec_state.frame(0).sourcePosition()); 93 } else { 94 assertEquals(debugger_source_position + 38, 95 exec_state.frame(0).sourcePosition()); 96 } 97 break; 98 default: 99 fail("Unexpected"); 100 } 101 exec_state.prepareStep(Debug.StepAction.StepIn, 1); 102 } else { 103 // Position at the end of the function. 104 assertEquals(debugger_source_position + 50, 105 exec_state.frame(0).sourcePosition()); 106 107 // Just about to return from the function. 108 assertTrue(exec_state.frame(0).isAtReturn()) 109 assertEquals(expected_return_value, 110 exec_state.frame(0).returnValue().value()); 111 112 // Check the same using the JSON commands. 113 var dcp = exec_state.debugCommandProcessor(false); 114 var request = '{"seq":0,"type":"request","command":"backtrace"}'; 115 var resp = dcp.processDebugJSONRequest(request); 116 response = new ParsedResponse(resp); 117 frames = response.body().frames; 118 assertTrue(frames[0].atReturn); 119 assertEquals(expected_return_value, 120 response.lookup(frames[0].returnValue.ref).value); 121 122 listener_complete = true; 123 } 124 } 125 } catch (e) { 126 exception = e 127 }; 128 }; 129 130 // Add the debug event listener. 131 Debug.setListener(listener); 132 133 // Four steps from the debugger statement in this function will position us at 134 // the function return. 135 // 0 1 2 3 4 5 136 // 0123456789012345678901234567890123456789012345678901 137 138 function f(x) {debugger; if (x) { return 1; } else { return 2; } }; 139 140 // Call f expecting different return values. 141 break_count = 0; 142 expected_return_value = 2; 143 listener_complete = false; 144 f(); 145 assertFalse(exception, "exception in listener") 146 assertTrue(listener_complete); 147 assertEquals(4, break_count); 148 149 break_count = 0; 150 expected_return_value = 1; 151 listener_complete = false; 152 f(true); 153 assertFalse(exception, "exception in listener") 154 assertTrue(listener_complete); 155 assertEquals(4, break_count); 156 157 break_count = 0; 158 expected_return_value = 2; 159 listener_complete = false; 160 f(false); 161 assertFalse(exception, "exception in listener") 162 assertTrue(listener_complete); 163 assertEquals(4, break_count); 164
