v8/test/mjsunit/regress/regress-crbug-245480.js

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// Copyright 2013 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: --allow-natives-syntax --smi-only-arrays --expose-gc
// Flags: --track-allocation-sites --noalways-opt
// Test element kind of objects.
// Since --smi-only-arrays affects builtins, its default setting at compile
// time sticks if built with snapshot. If --smi-only-arrays is deactivated
// by default, only a no-snapshot build actually has smi-only arrays enabled
// in this test case. Depending on whether smi-only arrays are actually
// enabled, this test takes the appropriate code path to check smi-only arrays.
// support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
support_smi_only_arrays = true;
if (support_smi_only_arrays) {
print("Tests include smi-only arrays.");
} else {
print("Tests do NOT include smi-only arrays.");
}
function isHoley(obj) {
if (%HasFastHoleyElements(obj)) return true;
return false;
}
function assertHoley(obj, name_opt) {
assertEquals(true, isHoley(obj), name_opt);
}
function assertNotHoley(obj, name_opt) {
assertEquals(false, isHoley(obj), name_opt);
}
if (support_smi_only_arrays) {
function create_array(arg) {
return new Array(arg);
}
obj = create_array(0);
assertNotHoley(obj);
create_array(0);
%OptimizeFunctionOnNextCall(create_array);
obj = create_array(10);
assertHoley(obj);
}
// The code below would assert in debug or crash in release
function f(length) {
return new Array(length)
}
f(0);
f(0);
%OptimizeFunctionOnNextCall(f);
var a = f(10);
function g(a) {
return a[0];
}
var b = [0];
g(b);
g(b);
assertEquals(undefined, g(a));