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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 | |
| 31 // Scenario: some function is being edited; the outer function has to have its | |
| 32 // positions patched. Accoring to a special markup of function text | |
| 33 // corresponding byte-code PCs should coincide before change and after it. | |
| 34 | |
| 35 Debug = debug.Debug | |
| 36 Debug.setListener(function() {}); | |
| 37 | |
| 38 eval( | |
| 39 "function F1() { return 5; }\n" + | |
| 40 "function ChooseAnimal(/*$*/ ) {\n" + | |
| 41 "/*$*/ var x = F1(/*$*/ );\n" + | |
| 42 "/*$*/ var res/*$*/ =/*$*/ (function() { return 'Cat'; } )();\n" + | |
| 43 "/*$*/ var y/*$*/ = F2(/*$*/ F1()/*$*/ , F1(/*$*/ )/*$*/ );\n" + | |
| 44 "/*$*/ if (/*$*/ x.toString(/*$*/ )) { /*$*/ y = 3;/*$*/ } else {/*$*/ y =
8;/*$*/ }\n" + | |
| 45 "/*$*/ var z = /*$*/ x * y;\n" + | |
| 46 "/*$*/ return/*$*/ res/*$*/ + z;/*$*/ }\n" + | |
| 47 "function F2(x, y) { return x + y; }" | |
| 48 ); | |
| 49 | |
| 50 // Find all *$* markers in text of the function and read corresponding statement | |
| 51 // PCs. | |
| 52 function ReadMarkerPositions(func) { | |
| 53 var text = func.toString(); | |
| 54 var positions = new Array(); | |
| 55 var match; | |
| 56 var pattern = /\/\*\$\*\//g; | |
| 57 while ((match = pattern.exec(text)) != null) { | |
| 58 positions.push(match.index); | |
| 59 } | |
| 60 return positions; | |
| 61 } | |
| 62 | |
| 63 function ReadPCMap(func, positions) { | |
| 64 var res = new Array(); | |
| 65 for (var i = 0; i < positions.length; i++) { | |
| 66 var pc = Debug.LiveEdit.GetPcFromSourcePos(func, positions[i]); | |
| 67 | |
| 68 if (typeof pc === 'undefined') { | |
| 69 // Function was marked for recompilation and it's code was replaced with a | |
| 70 // stub. This can happen at any time especially if we are running with | |
| 71 // --stress-opt. There is no way to get PCs now. | |
| 72 return; | |
| 73 } | |
| 74 | |
| 75 res.push(pc); | |
| 76 } | |
| 77 | |
| 78 return res; | |
| 79 } | |
| 80 | |
| 81 function ApplyPatch(orig_animal, new_animal) { | |
| 82 var res = ChooseAnimal(); | |
| 83 assertEquals(orig_animal + "15", res); | |
| 84 | |
| 85 var script = Debug.findScript(ChooseAnimal); | |
| 86 | |
| 87 var orig_string = "'" + orig_animal + "'"; | |
| 88 var patch_string = "'" + new_animal + "'"; | |
| 89 var patch_pos = script.source.indexOf(orig_string); | |
| 90 | |
| 91 var change_log = new Array(); | |
| 92 | |
| 93 Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, | |
| 94 patch_pos, | |
| 95 orig_string.length, | |
| 96 patch_string, | |
| 97 change_log); | |
| 98 | |
| 99 print("Change log: " + JSON.stringify(change_log) + "\n"); | |
| 100 | |
| 101 var markerPositions = ReadMarkerPositions(ChooseAnimal); | |
| 102 var pcArray = ReadPCMap(ChooseAnimal, markerPositions); | |
| 103 | |
| 104 var res = ChooseAnimal(); | |
| 105 assertEquals(new_animal + "15", res); | |
| 106 | |
| 107 return pcArray; | |
| 108 } | |
| 109 | |
| 110 var pcArray1 = ApplyPatch('Cat', 'Dog'); | |
| 111 | |
| 112 // When we patched function for the first time it was deoptimized. | |
| 113 // Check that after the second patch maping between sources position and | |
| 114 // pcs will not change. | |
| 115 | |
| 116 var pcArray2 = ApplyPatch('Dog', 'Capybara'); | |
| 117 | |
| 118 print(pcArray1); | |
| 119 print(pcArray2); | |
| 120 | |
| 121 // Function can be marked for recompilation at any point (especially if we are | |
| 122 // running with --stress-opt). When we mark function for recompilation we | |
| 123 // replace it's code with stub. So there is no reliable way to get PCs for | |
| 124 // function. | |
| 125 if (pcArray1 && pcArray2) { | |
| 126 assertArrayEquals(pcArray1, pcArray2); | |
| 127 } | |
| 128 | |
| 129 Debug.setListener(null); | |
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Chromium Code Reviews
Issue 2101223002:
[liveedit] remove bogus test case. (Closed)
Base URL: https://chromium.googlesource.com/v8/v8.git@master