84 lines
3.5 KiB
JavaScript
84 lines
3.5 KiB
JavaScript
|
// Copyright 2010 the V8 project authors. All rights reserved.
|
||
|
|
// Redistribution and use in source and binary forms, with or without
|
||
|
|
// modification, are permitted provided that the following conditions are
|
||
|
|
// met:
|
||
|
|
//
|
||
|
|
// * Redistributions of source code must retain the above copyright
|
||
|
|
// notice, this list of conditions and the following disclaimer.
|
||
|
|
// * Redistributions in binary form must reproduce the above
|
||
|
|
// copyright notice, this list of conditions and the following
|
||
|
|
// disclaimer in the documentation and/or other materials provided
|
||
|
|
// with the distribution.
|
||
|
|
// * Neither the name of Google Inc. nor the names of its
|
||
|
|
// contributors may be used to endorse or promote products derived
|
||
|
|
// from this software without specific prior written permission.
|
||
|
|
//
|
||
|
|
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
// Flags: --expose-debug-as debug
|
||
|
|
// Get the Debug object exposed from the debug context global object.
|
||
|
|
|
||
|
|
// Scenario: a function is being changed, which causes enclosing function to
|
||
|
|
// have its positions patched; position changing requires new instance of Code
|
||
|
|
// object to be introduced; the function happens to be on stack at this moment;
|
||
|
|
// later it will resume over new instance of Code.
|
||
|
|
// Before the change 2 rinfo are 22 characters away from each other. After the
|
||
|
|
// change they are 114 characters away from each other. New instance of Code is
|
||
|
|
// required when those numbers cross the border value of 64 (in any direction).
|
||
|
|
|
||
|
|
Debug = debug.Debug
|
||
|
|
|
||
|
|
eval(
|
||
|
|
"function BeingReplaced(changer, opt_x, opt_y) {\n" +
|
||
|
|
" changer();\n" +
|
||
|
|
" var res = new Object();\n" +
|
||
|
|
" if (opt_x) { res.y = opt_y; }\n" +
|
||
|
|
" res.a = (function() {})();\n" +
|
||
|
|
" return res.a;\n" +
|
||
|
|
"}"
|
||
|
|
);
|
||
|
|
|
||
|
|
var script = Debug.findScript(BeingReplaced);
|
||
|
|
|
||
|
|
var orig_body = "{}";
|
||
|
|
var patch_pos = script.source.indexOf(orig_body);
|
||
|
|
// Line long enough to change rinfo encoding.
|
||
|
|
var new_body_patch = "{return 'Capybara';" +
|
||
|
|
" " +
|
||
|
|
"}";
|
||
|
|
|
||
|
|
var change_log = new Array();
|
||
|
|
function Changer() {
|
||
|
|
Debug.LiveEditChangeScript(script, patch_pos, orig_body.length, new_body_patch, change_log);
|
||
|
|
print("Change log: " + JSON.stringify(change_log) + "\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
function NoOp() {
|
||
|
|
}
|
||
|
|
|
||
|
|
function CallM(changer) {
|
||
|
|
// We expect call IC here after several function runs.
|
||
|
|
return BeingReplaced(changer);
|
||
|
|
}
|
||
|
|
|
||
|
|
// This several iterations should cause call IC for BeingReplaced call. This IC
|
||
|
|
// will keep reference to code object of BeingRepalced function. This reference
|
||
|
|
// should also be patched. Unfortunately, this is a manually checked fact (from
|
||
|
|
// debugger or debug print) and doesn't work as an automatic test.
|
||
|
|
CallM(NoOp);
|
||
|
|
CallM(NoOp);
|
||
|
|
CallM(NoOp);
|
||
|
|
|
||
|
|
var res = CallM(Changer);
|
||
|
|
assertEquals("Capybara", res);
|