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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
28 // Flags: --expose-debug-as debug | 28 // Flags: --expose-debug-as debug |
29 // Get the Debug object exposed from the debug context global object. | 29 // Get the Debug object exposed from the debug context global object. |
30 | 30 |
31 Debug = debug.Debug | 31 Debug = debug.Debug |
32 | 32 |
33 eval( | 33 unique_id = 1; |
34 "function ChooseAnimal(callback) {\n " + | 34 |
35 " callback();\n" + | 35 function TestBase(name) { |
36 " return 'Cat';\n" + | 36 print("TestBase constructor: " + name); |
37 "}\n" | 37 |
38 ); | 38 this.ChooseAnimal = eval( |
| 39 "/* " + unique_id + "*/\n" + |
| 40 "(function ChooseAnimal(callback) {\n " + |
| 41 " callback();\n" + |
| 42 " return 'Cat';\n" + |
| 43 "})\n" |
| 44 ); |
| 45 // Prevents eval script caching. |
| 46 unique_id++; |
| 47 |
| 48 var script = Debug.findScript(this.ChooseAnimal); |
| 49 |
| 50 var orig_animal = "'Cat'"; |
| 51 var patch_pos = script.source.indexOf(orig_animal); |
| 52 var new_animal_patch = "'Capybara'"; |
| 53 |
| 54 var got_exception = false; |
| 55 var successfully_changed = false; |
| 56 |
| 57 // Should be called from Debug context. |
| 58 this.ScriptChanger = function() { |
| 59 assertEquals(false, successfully_changed, "applying patch second time"); |
| 60 // Runs in debugger context. |
| 61 var change_log = new Array(); |
| 62 try { |
| 63 Debug.LiveEditChangeScript(script, patch_pos, orig_animal.length, new_anim
al_patch, change_log); |
| 64 } finally { |
| 65 print("Change log: " + JSON.stringify(change_log) + "\n"); |
| 66 } |
| 67 successfully_changed = true; |
| 68 }; |
| 69 } |
39 | 70 |
40 function Noop() {} | 71 function Noop() {} |
41 var res = ChooseAnimal(Noop); | |
42 | 72 |
43 assertEquals("Cat", res); | 73 function WrapInCatcher(f, holder) { |
44 | 74 return function() { |
45 var script = Debug.findScript(ChooseAnimal); | 75 delete holder[0]; |
46 | 76 try { |
47 var orig_animal = "'Cat'"; | 77 f(); |
48 var patch_pos = script.source.indexOf(orig_animal); | 78 } catch (e) { |
49 var new_animal_patch = "'Capybara'"; | 79 if (e instanceof Debug.LiveEditChangeScript.Failure) { |
50 | 80 holder[0] = e; |
51 var got_exception = false; | 81 } else { |
52 var successfully_changed = false; | 82 throw e; |
53 | 83 } |
54 function Changer() { | |
55 // Never try the same patch again. | |
56 assertEquals(false, successfully_changed); | |
57 var change_log = new Array(); | |
58 try { | |
59 Debug.LiveEditChangeScript(script, patch_pos, orig_animal.length, new_animal
_patch, change_log); | |
60 successfully_changed = true; | |
61 } catch (e) { | |
62 if (e instanceof Debug.LiveEditChangeScript.Failure) { | |
63 got_exception = true; | |
64 print(e); | |
65 } else { | |
66 throw e; | |
67 } | 84 } |
68 } | 85 }; |
69 print("Change log: " + JSON.stringify(change_log) + "\n"); | |
70 } | 86 } |
71 | 87 |
72 var new_res = ChooseAnimal(Changer); | 88 function WrapInNativeCall(f) { |
73 // Function must be not pached. | 89 return function() { |
74 assertEquals("Cat", new_res); | 90 return Debug.ExecuteInDebugContext(f, true); |
| 91 }; |
| 92 } |
75 | 93 |
76 assertEquals(true, got_exception); | 94 function WrapInDebuggerCall(f) { |
| 95 return function() { |
| 96 return Debug.ExecuteInDebugContext(f, false); |
| 97 }; |
| 98 } |
77 | 99 |
78 // This time it should succeed. | 100 function WrapInRestartProof(f) { |
79 Changer(); | 101 var already_called = false; |
| 102 return function() { |
| 103 if (already_called) { |
| 104 return; |
| 105 } |
| 106 already_called = true; |
| 107 f(); |
| 108 } |
| 109 } |
80 | 110 |
81 new_res = ChooseAnimal(Noop); | 111 function WrapInConstructor(f) { |
82 // Function must be not pached. | 112 return function() { |
83 assertEquals("Capybara", new_res); | 113 return new function() { |
| 114 f(); |
| 115 }; |
| 116 } |
| 117 } |
84 | 118 |
| 119 |
| 120 // A series of tests. In each test we call ChooseAnimal function that calls |
| 121 // a callback that attempts to modify the function on the fly. |
| 122 |
| 123 test = new TestBase("First test ChooseAnimal without edit"); |
| 124 assertEquals("Cat", test.ChooseAnimal(Noop)); |
| 125 |
| 126 test = new TestBase("Test without function on stack"); |
| 127 test.ScriptChanger(); |
| 128 assertEquals("Capybara", test.ChooseAnimal(Noop)); |
| 129 |
| 130 test = new TestBase("Test with function on stack"); |
| 131 assertEquals("Capybara", test.ChooseAnimal(WrapInDebuggerCall(WrapInRestartProof
(test.ScriptChanger)))); |
| 132 |
| 133 |
| 134 test = new TestBase("Test with function on stack and with constructor frame"); |
| 135 assertEquals("Capybara", test.ChooseAnimal(WrapInConstructor(WrapInDebuggerCall(
WrapInRestartProof(test.ScriptChanger))))); |
| 136 |
| 137 test = new TestBase("Test with C++ frame above ChooseAnimal frame"); |
| 138 exception_holder = {}; |
| 139 assertEquals("Cat", test.ChooseAnimal(WrapInNativeCall(WrapInDebuggerCall(WrapIn
Catcher(test.ScriptChanger, exception_holder))))); |
| 140 assertTrue(!!exception_holder[0]); |
| 141 |
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