1 // Copyright 2008 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 // Tests how debugger can step over not necessarily in the top frame. 33 34 // Simple 3 functions, that protocol their execution state in global 35 // variable state. 36 var state; 37 38 function f() { 39 var a = 1978; 40 for (state[2] = 0; state[2] < 3; state[2]++) { 41 void String(a); 42 } 43 } 44 function g() { 45 for (state[1] = 0; state[1] < 3; state[1]++) { 46 f(); 47 } 48 } 49 function h() { 50 state = [-1, -1, -1]; 51 for (state[0] = 0; state[0] < 3; state[0]++) { 52 g(); 53 } 54 } 55 56 function TestCase(frame_index, step_count, expected_final_state) { 57 print("Test case, parameters " + frame_index + "/" + step_count); 58 59 var listener_exception = null; 60 var state_snapshot; 61 var listener_state; 62 var bp; 63 64 function listener(event, exec_state, event_data, data) { 65 print("Here ("+event+"/"+listener_state+"): " + 66 exec_state.frame(0).sourceLineText()); 67 try { 68 if (event == Debug.DebugEvent.Break) { 69 if (listener_state == 0) { 70 Debug.clearBreakPoint(bp); 71 var context_frame; 72 if (frame_index !== undefined) { 73 context_frame = exec_state.frame(frame_index); 74 } 75 exec_state.prepareStep(Debug.StepAction.StepNext, 76 step_count, context_frame); 77 listener_state = 1; 78 } else if (listener_state == 1) { 79 state_snapshot = String(state); 80 print("State: " + state_snapshot); 81 Debug.setListener(null); 82 listener_state = 2; 83 } 84 } 85 } catch (e) { 86 listener_exception = e; 87 } 88 } 89 90 91 // Add the debug event listener. 92 listener_state = 0; 93 Debug.setListener(listener); 94 bp = Debug.setBreakPoint(f, 1); 95 96 h(); 97 Debug.setListener(null); 98 if (listener_exception !== null) { 99 print("Exception caught: " + listener_exception); 100 assertUnreachable(); 101 } 102 103 assertEquals(expected_final_state, state_snapshot); 104 } 105 106 107 // Warm-up -- make sure all is compiled and ready for breakpoint. 108 h(); 109 110 111 // Stepping in the default (top) frame. 112 TestCase(undefined, 0, "0,0,-1"); 113 TestCase(undefined, 1, "0,0,-1"); 114 TestCase(undefined, 2, "0,0,0"); 115 TestCase(undefined, 5, "0,0,1"); 116 TestCase(undefined, 8, "0,0,3"); 117 118 // Stepping in the frame #0 (should be exactly the same as above). 119 TestCase(0, 0, "0,0,-1"); 120 TestCase(0, 1, "0,0,-1"); 121 TestCase(0, 2, "0,0,0"); 122 TestCase(0, 5, "0,0,1"); 123 TestCase(0, 8, "0,0,3"); 124 125 // Stepping in the frame #1. 126 TestCase(1, 0, "0,0,3"); 127 TestCase(1, 3, "0,1,3"); 128 TestCase(1, 7, "0,3,3"); 129 130 // Stepping in the frame #2. 131 TestCase(2, 3, "1,3,3"); 132 TestCase(2, 7, "3,3,3"); 133