Mercurial > hg > truffle
view test/compiler/6855164/Test.java @ 1593:2458a1f25356
6953058: G1: A bigapp crashes with SIGSEGV in compiled code
Summary: In C2's G1 post write barrier, the loads of the buffer and index fields from the DirtyCardQueue structure may be moved across a safepoint. Use the current value of "control" in the C2 IR to limit how far these loads can move.
Reviewed-by: never, iveresov, kvn
author | johnc |
---|---|
date | Mon, 07 Jun 2010 17:46:04 -0700 |
parents | 73dac61fe300 |
children | c18cbe5936b8 |
line wrap: on
line source
/* * Copyright 2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. */ /* * @test * @bug 6855164 * @summary SIGSEGV during compilation of method involving loop over CharSequence * @run main/othervm -Xbatch Test */ public class Test{ public static void main(String[] args) throws Exception { StringBuffer builder = new StringBuffer(); for(int i = 0; i < 100; i++) builder.append("I am the very model of a modern major general\n"); for(int j = 0; j < builder.length(); j++){ previousSpaceIndex(builder, j); } } private static final int previousSpaceIndex(CharSequence sb, int seek) { seek--; while (seek > 0) { if (sb.charAt(seek) == ' ') { while (seek > 0 && sb.charAt(seek - 1) == ' ') seek--; return seek; } seek--; } return 0; } }