Mercurial > hg > truffle
view test/compiler/6663621/IVTest.java @ 3293:1f4413413144
7039089: G1: changeset for 7037276 broke heap verification, and related cleanups
Summary: In G1 heap verification, we no longer scan perm to G1-collected heap refs as part of process_strong_roots() but rather in a separate explicit oop iteration over the perm gen. This preserves the original perm card-marks. Added a new assertion in younger_refs_iterate() to catch a simple subcase where the user may have forgotten a prior save_marks() call, as happened in the case of G1's attempt to iterate perm to G1 refs when verifying the heap before exit. The assert was deliberately weakened for ParNew+CMS and will be fixed for that combination in a future CR. Also made some (non-G1) cleanups related to code and comments obsoleted by the migration of Symbols to the native heap.
Reviewed-by: iveresov, jmasa, tonyp
author | ysr |
---|---|
date | Tue, 26 Apr 2011 21:17:24 -0700 |
parents | c18cbe5936b8 |
children |
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/* * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ /** * @test * @bug 6663621 * @summary JVM crashes while trying to execute api/java_security/Signature/SignatureTests.html#initSign tests. */ public class IVTest { static int paddedSize; static void padV15(byte[] padded) { int psSize = padded.length; int k = 0; while (psSize-- > 0) { padded[k++] = (byte)0xff; } } static void padV15_2(int paddedSize) { byte[] padded = new byte[paddedSize]; int psSize = padded.length; int k = 0; while (psSize-- > 0) { padded[k++] = (byte)0xff; } } static void padV15_3() { byte[] padded = new byte[paddedSize]; int psSize = padded.length; int k = 0; while (psSize-- > 0) { padded[k++] = (byte)0xff; } } static void padV15_4() { byte[] padded = new byte[paddedSize]; int psSize = padded.length; for (int k = 0;psSize > 0; psSize--) { int i = padded.length - psSize; padded[i] = (byte)0xff; } } static void padV15_5() { byte[] padded = new byte[paddedSize]; int psSize = padded.length; int k = psSize - 1; for (int i = 0; i < psSize; i++) { padded[k--] = (byte)0xff; } } public static void main(String argv[]) { int bounds = 1024; int lim = 500000; long start = System.currentTimeMillis(); for (int j = 0; j < lim; j++) { paddedSize = j % bounds; padV15(new byte[paddedSize]); } long end = System.currentTimeMillis(); System.out.println(end - start); start = System.currentTimeMillis(); for (int j = 0; j < lim; j++) { paddedSize = j % bounds; padV15_2(paddedSize); } end = System.currentTimeMillis(); System.out.println(end - start); start = System.currentTimeMillis(); for (int j = 0; j < lim; j++) { paddedSize = j % bounds; padV15_3(); } end = System.currentTimeMillis(); System.out.println(end - start); start = System.currentTimeMillis(); for (int j = 0; j < lim; j++) { paddedSize = j % bounds; padV15_4(); } end = System.currentTimeMillis(); System.out.println(end - start); start = System.currentTimeMillis(); for (int j = 0; j < lim; j++) { paddedSize = j % bounds; padV15_5(); } end = System.currentTimeMillis(); System.out.println(end - start); } }