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view test/compiler/6910605/Test.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) 2010, 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 6910605 * @summary C2: NullPointerException/ClassCaseException is thrown when C2 with DeoptimizeALot is used * * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -XX:+DeoptimizeALot -Xbatch Test * * original test: nsk/coverage/runtime/runtime007 */ import java.io.*; public class Test { public static int buf=0; public static void main( String argv[] ) { System.exit(run(argv, System.out)+95); } public static int run(String argv[],PrintStream out) { int ret=0, retx=0, bad=0; for( int i=0; (i < 100000) && (bad < 10) ; i++ ) { retx = OptoRuntime_f2i_Type(out); ret += retx; if( retx !=0 ) { out.println("i="+i); bad++; } } return ret==0 ? 0 : 2 ; } public static int OptoRuntime_f2i_Type(PrintStream out) { int c1=2, c2=3, c3=4, c4=5, c5=6; int j=0, k=0; try { int[][] iii=(int[][])(new int[c1][c2]); for( j=0; j<c1; j++ ) { for( k=0; k<c2; k++ ) { iii[j][k]=(int)((float)(j+1)/(float)(k+1)); } } } catch (Throwable e) { out.println("Unexpected exception " + e); e.printStackTrace(out); out.println("j="+j+", k="+k); return 1; } return 0; } }