0e9149c543
Review URL: http://codereview.chromium.org/1549041 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4419 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
84 lines
3.5 KiB
JavaScript
84 lines
3.5 KiB
JavaScript
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --expose-debug-as debug
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// Get the Debug object exposed from the debug context global object.
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// Scenario: a function is being changed, which causes enclosing function to
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// have its positions patched; position changing requires new instance of Code
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// object to be introduced; the function happens to be on stack at this moment;
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// later it will resume over new instance of Code.
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// Before the change 2 rinfo are 22 characters away from each other. After the
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// change they are 114 characters away from each other. New instance of Code is
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// required when those numbers cross the border value of 64 (in any direction).
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Debug = debug.Debug
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eval(
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"function BeingReplaced(changer, opt_x, opt_y) {\n" +
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" changer();\n" +
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" var res = new Object();\n" +
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" if (opt_x) { res.y = opt_y; }\n" +
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" res.a = (function() {})();\n" +
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" return res.a;\n" +
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"}"
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);
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var script = Debug.findScript(BeingReplaced);
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var orig_body = "{}";
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var patch_pos = script.source.indexOf(orig_body);
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// Line long enough to change rinfo encoding.
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var new_body_patch = "{return 'Capybara';" +
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" " +
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"}";
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var change_log = new Array();
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function Changer() {
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Debug.LiveEdit.ApplyPatch(script, patch_pos, orig_body.length, new_body_patch, change_log);
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print("Change log: " + JSON.stringify(change_log) + "\n");
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}
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function NoOp() {
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}
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function CallM(changer) {
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// We expect call IC here after several function runs.
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return BeingReplaced(changer);
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}
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// This several iterations should cause call IC for BeingReplaced call. This IC
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// will keep reference to code object of BeingRepalced function. This reference
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// should also be patched. Unfortunately, this is a manually checked fact (from
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// debugger or debug print) and doesn't work as an automatic test.
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CallM(NoOp);
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CallM(NoOp);
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CallM(NoOp);
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var res = CallM(Changer);
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assertEquals("Capybara", res);
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