tschatzl@5701: /*
tschatzl@5701: * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
tschatzl@5701: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
tschatzl@5701: *
tschatzl@5701: * This code is free software; you can redistribute it and/or modify it
tschatzl@5701: * under the terms of the GNU General Public License version 2 only, as
tschatzl@5701: * published by the Free Software Foundation.
tschatzl@5701: *
tschatzl@5701: * This code is distributed in the hope that it will be useful, but WITHOUT
tschatzl@5701: * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
tschatzl@5701: * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
tschatzl@5701: * version 2 for more details (a copy is included in the LICENSE file that
tschatzl@5701: * accompanied this code).
tschatzl@5701: *
tschatzl@5701: * You should have received a copy of the GNU General Public License version
tschatzl@5701: * 2 along with this work; if not, write to the Free Software Foundation,
tschatzl@5701: * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
tschatzl@5701: *
tschatzl@5701: * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
tschatzl@5701: * or visit www.oracle.com if you need additional information or have any
tschatzl@5701: * questions.
tschatzl@5701: */
tschatzl@5701: 
tschatzl@5701: import sun.management.ManagementFactoryHelper;
tschatzl@5701: import com.sun.management.HotSpotDiagnosticMXBean;
tschatzl@5701: import com.sun.management.VMOption;
tschatzl@5701: 
tschatzl@5701: import java.util.regex.Matcher;
tschatzl@5701: import java.util.regex.Pattern;
tschatzl@5701: import java.util.ArrayList;
tschatzl@5701: import java.util.Arrays;
tschatzl@5701: 
tschatzl@5701: import com.oracle.java.testlibrary.*;
tschatzl@5701: import sun.hotspot.WhiteBox;
tschatzl@5701: 
tschatzl@5701: class DetermineMaxHeapForCompressedOops {
tschatzl@5701:   public static void main(String[] args) throws Exception {
tschatzl@5701:     WhiteBox wb = WhiteBox.getWhiteBox();
tschatzl@5701:     System.out.print(wb.getCompressedOopsMaxHeapSize());
tschatzl@5701:   }
tschatzl@5701: }
tschatzl@5701: 
tschatzl@5701: class TestUseCompressedOopsErgoTools {
tschatzl@5701: 
tschatzl@5717:   private static long getCompressedClassSpaceSize() {
tschatzl@5701:     HotSpotDiagnosticMXBean diagnostic = ManagementFactoryHelper.getDiagnosticMXBean();
tschatzl@5701: 
tschatzl@5717:     VMOption option = diagnostic.getVMOption("CompressedClassSpaceSize");
tschatzl@5701:     return Long.parseLong(option.getValue());
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701: 
tschatzl@5701:   public static long getMaxHeapForCompressedOops(String[] vmargs) throws Exception {
tschatzl@5701:     OutputAnalyzer output = runWhiteBoxTest(vmargs, DetermineMaxHeapForCompressedOops.class.getName(), new String[] {}, false);
tschatzl@5701:     return Long.parseLong(output.getStdout());
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   public static boolean is64bitVM() {
tschatzl@5701:     String val = System.getProperty("sun.arch.data.model");
tschatzl@5701:     if (val == null) {
tschatzl@5701:       throw new RuntimeException("Could not read sun.arch.data.model");
tschatzl@5701:     }
tschatzl@5701:     if (val.equals("64")) {
tschatzl@5701:       return true;
tschatzl@5701:     } else if (val.equals("32")) {
tschatzl@5701:       return false;
tschatzl@5701:     }
tschatzl@5701:     throw new RuntimeException("Unexpected value " + val + " of sun.arch.data.model");
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   /**
tschatzl@5701:    * Executes a new VM process with the given class and parameters.
tschatzl@5701:    * @param vmargs Arguments to the VM to run
tschatzl@5701:    * @param classname Name of the class to run
tschatzl@5701:    * @param arguments Arguments to the class
tschatzl@5701:    * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string
tschatzl@5701:    * @return The OutputAnalyzer with the results for the invocation.
tschatzl@5701:    */
tschatzl@5701:   public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception {
tschatzl@5701:     ArrayList<String> finalargs = new ArrayList<String>();
tschatzl@5701: 
tschatzl@5701:     String[] whiteboxOpts = new String[] {
tschatzl@5701:       "-Xbootclasspath/a:.",
tschatzl@5701:       "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",
tschatzl@5701:       "-cp", System.getProperty("java.class.path"),
tschatzl@5701:     };
tschatzl@5701: 
tschatzl@5701:     if (useTestDotJavaDotOpts) {
tschatzl@5701:       // System.getProperty("test.java.opts") is '' if no options is set,
tschatzl@5701:       // we need to skip such a result
tschatzl@5701:       String[] externalVMOpts = new String[0];
tschatzl@5701:       if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) {
tschatzl@5701:         externalVMOpts = System.getProperty("test.java.opts").split(" ");
tschatzl@5701:       }
tschatzl@5701:       finalargs.addAll(Arrays.asList(externalVMOpts));
tschatzl@5701:     }
tschatzl@5701: 
tschatzl@5701:     finalargs.addAll(Arrays.asList(vmargs));
tschatzl@5701:     finalargs.addAll(Arrays.asList(whiteboxOpts));
tschatzl@5701:     finalargs.add(classname);
tschatzl@5701:     finalargs.addAll(Arrays.asList(arguments));
tschatzl@5701: 
tschatzl@5701:     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0]));
tschatzl@5701:     OutputAnalyzer output = new OutputAnalyzer(pb.start());
tschatzl@5701:     output.shouldHaveExitValue(0);
tschatzl@5701:     return output;
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   private static String[] join(String[] part1, String part2) {
tschatzl@5701:     ArrayList<String> result = new ArrayList<String>();
tschatzl@5701:     result.addAll(Arrays.asList(part1));
tschatzl@5701:     result.add(part2);
tschatzl@5701:     return result.toArray(new String[0]);
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   public static void checkCompressedOopsErgo(String[] gcflags) throws Exception {
tschatzl@5701:     long maxHeapForCompressedOops = getMaxHeapForCompressedOops(gcflags);
tschatzl@5701: 
tschatzl@5701:     checkUseCompressedOops(gcflags, maxHeapForCompressedOops, true);
tschatzl@5701:     checkUseCompressedOops(gcflags, maxHeapForCompressedOops - 1, true);
tschatzl@5701:     checkUseCompressedOops(gcflags, maxHeapForCompressedOops + 1, false);
tschatzl@5701: 
tschatzl@5701:     // the use of HeapBaseMinAddress should not change the outcome
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops, true);
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops - 1, true);
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops + 1, false);
tschatzl@5701: 
tschatzl@5701:     // use a different object alignment
tschatzl@5701:     maxHeapForCompressedOops = getMaxHeapForCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"));
tschatzl@5701: 
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops, true);
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops - 1, true);
tschatzl@5701:     checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops + 1, false);
tschatzl@5701: 
tschatzl@5717:     // use a different CompressedClassSpaceSize
tschatzl@5717:     String compressedClassSpaceSizeArg = "-XX:CompressedClassSpaceSize=" + 2 * getCompressedClassSpaceSize();
tschatzl@5717:     maxHeapForCompressedOops = getMaxHeapForCompressedOops(join(gcflags, compressedClassSpaceSizeArg));
tschatzl@5701: 
tschatzl@5717:     checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops, true);
tschatzl@5717:     checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops - 1, true);
tschatzl@5717:     checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops + 1, false);
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   private static void checkUseCompressedOops(String[] args, long heapsize, boolean expectUseCompressedOops) throws Exception {
tschatzl@5701:      ArrayList<String> finalargs = new ArrayList<String>();
tschatzl@5701:      finalargs.addAll(Arrays.asList(args));
tschatzl@5701:      finalargs.add("-Xmx" + heapsize);
tschatzl@5701:      finalargs.add("-XX:+PrintFlagsFinal");
tschatzl@5701:      finalargs.add("-version");
tschatzl@5701: 
tschatzl@5701:      String output = expectValid(finalargs.toArray(new String[0]));
tschatzl@5701: 
tschatzl@5701:      boolean actualUseCompressedOops = getFlagBoolValue(" UseCompressedOops", output);
tschatzl@5701: 
tschatzl@5717:      Asserts.assertEQ(expectUseCompressedOops, actualUseCompressedOops);
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   private static boolean getFlagBoolValue(String flag, String where) {
tschatzl@5701:     Matcher m = Pattern.compile(flag + "\\s+:?= (true|false)").matcher(where);
tschatzl@5701:     if (!m.find()) {
tschatzl@5701:       throw new RuntimeException("Could not find value for flag " + flag + " in output string");
tschatzl@5701:     }
tschatzl@5717:     return m.group(1).equals("true");
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   private static String expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception {
tschatzl@5701:     ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags);
tschatzl@5701:     OutputAnalyzer output = new OutputAnalyzer(pb.start());
tschatzl@5701:     output.shouldHaveExitValue(errorcode);
tschatzl@5701:     return output.getStdout();
tschatzl@5701:   }
tschatzl@5701: 
tschatzl@5701:   private static String expectValid(String[] flags) throws Exception {
tschatzl@5701:     return expect(flags, false, false, 0);
tschatzl@5701:   }
tschatzl@5701: }
tschatzl@5701: