1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test LargeSharedSpace 26 * @bug 8168790 8169870 27 * @summary Test CDS dumping using specific space size without crashing. 28 * The space size used in the test might not be suitable on windows. 29 * @requires (os.family != "windows") 30 * @library /test/lib 31 * @modules java.base/jdk.internal.misc 32 * java.management 33 * @run main LargeSharedSpace 34 */ 35 36 import jdk.test.lib.process.ProcessTools; 37 import jdk.test.lib.process.OutputAnalyzer; 38 import jdk.test.lib.Platform; 39 40 public class LargeSharedSpace { 41 public static void main(String[] args) throws Exception { 42 ProcessBuilder pb; 43 OutputAnalyzer output; 44 45 // Test case 1: -XX:SharedMiscCodeSize=1066924031 46 // 47 // The archive should be dumped successfully. It might fail to reserve memory 48 // for shared space under low memory condition. The dumping process should not crash. 49 pb = ProcessTools.createJavaProcessBuilder( 50 "-XX:SharedMiscCodeSize=1066924031", "-XX:+UnlockDiagnosticVMOptions", 51 "-XX:SharedArchiveFile=./LargeSharedSpace.jsa", "-Xshare:dump"); 52 output = new OutputAnalyzer(pb.start()); 53 try { 54 output.shouldContain("Loading classes to share"); 55 } catch (RuntimeException e1) { 56 output.shouldContain("Unable to allocate memory for shared space"); 57 } 58 59 // Test case 2: -XX:SharedMiscCodeSize=1600386047 60 // 61 // On 64-bit platform, compressed class pointer is used. When the combined 62 // shared space size and the compressed space size is larger than the 4G 63 // compressed klass limit (0x100000000), error is reported. 64 // 65 // The dumping process should not crash. 66 if (Platform.is64bit()) { 67 pb = ProcessTools.createJavaProcessBuilder( 68 "-XX:+UseCompressedClassPointers", "-XX:CompressedClassSpaceSize=3G", 69 "-XX:SharedMiscCodeSize=1600386047", "-XX:+UnlockDiagnosticVMOptions", 70 "-XX:SharedArchiveFile=./LargeSharedSpace.jsa", "-Xshare:dump"); 71 output = new OutputAnalyzer(pb.start()); 72 output.shouldContain("larger than compressed klass limit"); 73 } 74 75 // Test case 3: -XX:SharedMiscCodeSize=1600386047 76 // 77 // On 32-bit platform, compressed class pointer is not used. It may fail 78 // to reserve memory under low memory condition. 79 // 80 // The dumping process should not crash. 81 if (Platform.is32bit()) { 82 pb = ProcessTools.createJavaProcessBuilder( 83 "-XX:SharedMiscCodeSize=1600386047", "-XX:+UnlockDiagnosticVMOptions", 84 "-XX:SharedArchiveFile=./LargeSharedSpace.jsa", "-Xshare:dump"); 85 output = new OutputAnalyzer(pb.start()); 86 try { 87 output.shouldContain("Loading classes to share"); 88 } catch (RuntimeException e3) { 89 output.shouldContain("Unable to allocate memory for shared space"); 90 } 91 } 92 } 93 }