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| 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 listener_complete = false; | |
| 33 exception = false; | |
| 34 break_count = 0; | |
| 35 expected_return_value = 0; | |
| 36 debugger_source_position = 0; | |
| 37 | |
| 38 // Listener which expects to do four steps to reach returning from the function. | |
| 39 function listener(event, exec_state, event_data, data) { | |
| 40 try { | |
| 41 if (event == Debug.DebugEvent.Break) | |
| 42 { | |
| 43 break_count++; | |
| 44 if (break_count < 4) { | |
| 45 assertFalse(exec_state.frame(0).isAtReturn()) | |
| 46 switch (break_count) { | |
| 47 case 1: | |
| 48 // Collect the position of the debugger statement. | |
| 49 debugger_source_position = exec_state.frame(0).sourcePosition(); | |
| 50 break; | |
| 51 case 2: | |
| 52 // Position now at the if statement. | |
| 53 assertEquals(debugger_source_position + 10, | |
| 54 exec_state.frame(0).sourcePosition()); | |
| 55 break; | |
| 56 case 3: | |
| 57 // Position now at either of the returns. | |
| 58 if (expected_return_value == 1) { | |
| 59 assertEquals(debugger_source_position + 19, | |
| 60 exec_state.frame(0).sourcePosition()); | |
| 61 } else { | |
| 62 assertEquals(debugger_source_position + 38, | |
| 63 exec_state.frame(0).sourcePosition()); | |
| 64 } | |
| 65 break; | |
| 66 default: | |
| 67 fail("Unexpected"); | |
| 68 } | |
| 69 exec_state.prepareStep(Debug.StepAction.StepIn); | |
| 70 } else { | |
| 71 // Position at the end of the function. | |
| 72 assertEquals(debugger_source_position + 50, | |
| 73 exec_state.frame(0).sourcePosition()); | |
| 74 | |
| 75 // Just about to return from the function. | |
| 76 assertTrue(exec_state.frame(0).isAtReturn()) | |
| 77 assertEquals(expected_return_value, | |
| 78 exec_state.frame(0).returnValue().value()); | |
| 79 | |
| 80 listener_complete = true; | |
| 81 } | |
| 82 } | |
| 83 } catch (e) { | |
| 84 exception = e | |
| 85 print(e + e.stack) | |
| 86 }; | |
| 87 }; | |
| 88 | |
| 89 // Add the debug event listener. | |
| 90 Debug.setListener(listener); | |
| 91 | |
| 92 // Four steps from the debugger statement in this function will position us at | |
| 93 // the function return. | |
| 94 // 0 1 2 3 4 5 | |
| 95 // 0123456789012345678901234567890123456789012345678901 | |
| 96 | |
| 97 function f(x) {debugger; if (x) { return 1; } else { return 2; } }; | |
| 98 | |
| 99 // Call f expecting different return values. | |
| 100 break_count = 0; | |
| 101 expected_return_value = 2; | |
| 102 listener_complete = false; | |
| 103 f(); | |
| 104 assertFalse(exception, "exception in listener") | |
| 105 assertTrue(listener_complete); | |
| 106 assertEquals(4, break_count); | |
| 107 | |
| 108 break_count = 0; | |
| 109 expected_return_value = 1; | |
| 110 listener_complete = false; | |
| 111 f(true); | |
| 112 assertFalse(exception, "exception in listener") | |
| 113 assertTrue(listener_complete); | |
| 114 assertEquals(4, break_count); | |
| 115 | |
| 116 break_count = 0; | |
| 117 expected_return_value = 2; | |
| 118 listener_complete = false; | |
| 119 f(false); | |
| 120 assertFalse(exception, "exception in listener") | |
| 121 assertTrue(listener_complete); | |
| 122 assertEquals(4, break_count); | |
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