mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
2.7 KiB
63 lines
2.7 KiB
// Copyright 2011 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.
|
|
|
|
// Regression test of a very rare corner case where left-trimming an
|
|
// array caused invalid marking bit patterns on lazily swept pages.
|
|
|
|
// Flags: --expose-gc --noincremental-marking --max-new-space-size 1000
|
|
|
|
(function() {
|
|
var head = new Array(1);
|
|
var tail = head;
|
|
|
|
// Fill heap to increase old-space size and trigger lazy sweeping on
|
|
// some of the old-space pages.
|
|
for (var i = 0; i < 200; i++) {
|
|
tail[1] = new Array(1000);
|
|
tail = tail[1];
|
|
}
|
|
array = new Array(100);
|
|
gc(); gc();
|
|
|
|
// At this point "array" should have been promoted to old-space and be
|
|
// located in a lazy swept page with intact marking bits. Now shift
|
|
// the array to trigger left-trimming operations.
|
|
assertEquals(100, array.length);
|
|
for (var i = 0; i < 50; i++) {
|
|
array.shift();
|
|
}
|
|
assertEquals(50, array.length);
|
|
|
|
// At this point "array" should have been trimmed from the left with
|
|
// marking bits being correctly transfered to the new object start.
|
|
// Scavenging operations cause lazy sweeping to advance and verify
|
|
// that marking bit patterns are still sane.
|
|
for (var i = 0; i < 200; i++) {
|
|
tail[1] = new Array(1000);
|
|
tail = tail[1];
|
|
}
|
|
})();
|
|
|