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: a function is being changed, which causes enclosing function to 32 // have its positions patched; position changing requires new instance of Code 33 // object to be introduced; the function happens to be on stack at this moment; 34 // later it will resume over new instance of Code. 35 // Before the change 2 rinfo are 22 characters away from each other. After the 36 // change they are 114 characters away from each other. New instance of Code is 37 // required when those numbers cross the border value of 64 (in any direction). 38 39 Debug = debug.Debug 40 41 eval( 42 "function BeingReplaced(changer, opt_x, opt_y) {\n" + 43 " changer();\n" + 44 " var res = new Object();\n" + 45 " if (opt_x) { res.y = opt_y; }\n" + 46 " res.a = (function() {})();\n" + 47 " return res.a;\n" + 48 "}" 49 ); 50 51 var script = Debug.findScript(BeingReplaced); 52 53 var orig_body = "{}"; 54 var patch_pos = script.source.indexOf(orig_body); 55 // Line long enough to change rinfo encoding. 56 var new_body_patch = "{return 'Capybara';" + 57 " " + 58 "}"; 59 60 var change_log = new Array(); 61 function Changer() { 62 Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos, orig_body.length, new_body_patch, change_log); 63 print("Change log: " + JSON.stringify(change_log) + "\n"); 64 } 65 66 function NoOp() { 67 } 68 69 function CallM(changer) { 70 // We expect call IC here after several function runs. 71 return BeingReplaced(changer); 72 } 73 74 // This several iterations should cause call IC for BeingReplaced call. This IC 75 // will keep reference to code object of BeingRepalced function. This reference 76 // should also be patched. Unfortunately, this is a manually checked fact (from 77 // debugger or debug print) and doesn't work as an automatic test. 78 CallM(NoOp); 79 CallM(NoOp); 80 CallM(NoOp); 81 82 var res = CallM(Changer); 83 assertEquals("Capybara", res); 84
