v8/test/webkit/dfg-patchable-get-by-id-after-watchpoint.js

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// Copyright 2013 the V8 project authors. All rights reserved.
// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. 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.
//
// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
description(
"This tests that a patchable GetById right after a watchpoint has the appropriate nop padding."
);
function foo(o, p) {
var a = p.f;
var b = o.f; // Watchpoint.
var c = p.g; // Patchable GetById.
return b(a + c);
}
function O() {
}
O.prototype.f = function(x) { return x + 1; };
var o = new O();
function P1() {
}
P1.prototype.g = 42;
function P2() {
}
P2.prototype.g = 24;
var p1 = new P1();
var p2 = new P2();
p1.f = 1;
p2.f = 2;
for (var i = 0; i < 200; ++i) {
var p = (i % 2) ? p1 : p2;
var expected = (i % 2) ? 44 : 27;
if (i == 150) {
// Cause first the watchpoint on o.f to fire, and then the GetById
// to be reset.
O.prototype.g = 57; // Fire the watchpoint.
P1.prototype.h = 58; // Reset the GetById.
P2.prototype.h = 59; // Not necessary, but what the heck - this resets the GetById even more.
}
shouldBe("foo(o, p)", "" + expected);
}