1 /* 2 * Copyright (c) 2014, 2020, 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 26 * @bug 8022865 27 * @summary Tests for the -XX:CompressedClassSpaceSize command line option 28 * @requires vm.bits == 64 & vm.opt.final.UseCompressedOops == true 29 * @library /test/lib 30 * @modules java.base/jdk.internal.misc 31 * java.management 32 * @run driver CompressedClassSpaceSize 33 */ 34 35 import jdk.test.lib.process.ProcessTools; 36 import jdk.test.lib.process.OutputAnalyzer; 37 38 public class CompressedClassSpaceSize { 39 40 public static void main(String[] args) throws Exception { 41 ProcessBuilder pb; 42 OutputAnalyzer output; 43 // Minimum size is 1MB 44 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=0", 45 "-version"); 46 output = new OutputAnalyzer(pb.start()); 47 output.shouldContain("outside the allowed range") 48 .shouldHaveExitValue(1); 49 50 // Invalid size of -1 should be handled correctly 51 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=-1", 52 "-version"); 53 output = new OutputAnalyzer(pb.start()); 54 output.shouldContain("Improperly specified VM option 'CompressedClassSpaceSize=-1'") 55 .shouldHaveExitValue(1); 56 57 58 // Maximum size is 3GB 59 pb = ProcessTools.createJavaProcessBuilder("-XX:CompressedClassSpaceSize=4g", 60 "-version"); 61 output = new OutputAnalyzer(pb.start()); 62 output.shouldContain("outside the allowed range") 63 .shouldHaveExitValue(1); 64 65 66 // Make sure the minimum size is set correctly and printed 67 pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions", 68 "-XX:CompressedClassSpaceSize=1m", 69 "-Xlog:gc+metaspace=trace", 70 "-version"); 71 output = new OutputAnalyzer(pb.start()); 72 output.shouldMatch("Compressed class space.*1048576") 73 .shouldHaveExitValue(0); 74 75 76 // Make sure the maximum size is set correctly and printed 77 pb = ProcessTools.createJavaProcessBuilder("-XX:+UnlockDiagnosticVMOptions", 78 "-XX:CompressedClassSpaceSize=3g", 79 "-Xlog:gc+metaspace=trace", 80 "-version"); 81 output = new OutputAnalyzer(pb.start()); 82 output.shouldMatch("Compressed class space.*3221225472") 83 .shouldHaveExitValue(0); 84 85 86 pb = ProcessTools.createJavaProcessBuilder("-XX:-UseCompressedClassPointers", 87 "-XX:CompressedClassSpaceSize=1m", 88 "-version"); 89 output = new OutputAnalyzer(pb.start()); 90 output.shouldContain("Setting CompressedClassSpaceSize has no effect when compressed class pointers are not used") 91 .shouldHaveExitValue(0); 92 } 93 }