| /* |
| * Copyright (c) 2013, 2015, 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. |
| */ |
| |
| import com.sun.management.HotSpotDiagnosticMXBean; |
| import com.sun.management.VMOption; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| import jdk.test.lib.Asserts; |
| import jdk.test.lib.process.ProcessTools; |
| import jdk.test.lib.process.OutputAnalyzer; |
| import java.lang.management.ManagementFactory; |
| import sun.hotspot.WhiteBox; |
| |
| class DetermineMaxHeapForCompressedOops { |
| public static void main(String[] args) throws Exception { |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| System.out.print(wb.getCompressedOopsMaxHeapSize()); |
| } |
| } |
| |
| class TestUseCompressedOopsErgoTools { |
| |
| private static long getCompressedClassSpaceSize() { |
| HotSpotDiagnosticMXBean diagnostic = |
| ManagementFactory.getPlatformMXBean(HotSpotDiagnosticMXBean.class); |
| |
| VMOption option = diagnostic.getVMOption("CompressedClassSpaceSize"); |
| return Long.parseLong(option.getValue()); |
| } |
| |
| |
| public static long getMaxHeapForCompressedOops(String[] vmargs) throws Exception { |
| OutputAnalyzer output = runWhiteBoxTest(vmargs, DetermineMaxHeapForCompressedOops.class.getName(), new String[] {}, false); |
| return Long.parseLong(output.getStdout()); |
| } |
| |
| public static boolean is64bitVM() { |
| String val = System.getProperty("sun.arch.data.model"); |
| if (val == null) { |
| throw new RuntimeException("Could not read sun.arch.data.model"); |
| } |
| if (val.equals("64")) { |
| return true; |
| } else if (val.equals("32")) { |
| return false; |
| } |
| throw new RuntimeException("Unexpected value " + val + " of sun.arch.data.model"); |
| } |
| |
| /** |
| * Executes a new VM process with the given class and parameters. |
| * @param vmargs Arguments to the VM to run |
| * @param classname Name of the class to run |
| * @param arguments Arguments to the class |
| * @param useTestDotJavaDotOpts Use test.java.opts as part of the VM argument string |
| * @return The OutputAnalyzer with the results for the invocation. |
| */ |
| public static OutputAnalyzer runWhiteBoxTest(String[] vmargs, String classname, String[] arguments, boolean useTestDotJavaDotOpts) throws Exception { |
| ArrayList<String> finalargs = new ArrayList<String>(); |
| |
| String[] whiteboxOpts = new String[] { |
| "-Xbootclasspath/a:.", |
| "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI", |
| "-cp", System.getProperty("java.class.path"), |
| }; |
| |
| if (useTestDotJavaDotOpts) { |
| // System.getProperty("test.java.opts") is '' if no options is set, |
| // we need to skip such a result |
| String[] externalVMOpts = new String[0]; |
| if (System.getProperty("test.java.opts") != null && System.getProperty("test.java.opts").length() != 0) { |
| externalVMOpts = System.getProperty("test.java.opts").split(" "); |
| } |
| finalargs.addAll(Arrays.asList(externalVMOpts)); |
| } |
| |
| finalargs.addAll(Arrays.asList(vmargs)); |
| finalargs.addAll(Arrays.asList(whiteboxOpts)); |
| finalargs.add(classname); |
| finalargs.addAll(Arrays.asList(arguments)); |
| |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(finalargs.toArray(new String[0])); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldHaveExitValue(0); |
| return output; |
| } |
| |
| private static String[] join(String[] part1, String part2) { |
| ArrayList<String> result = new ArrayList<String>(); |
| result.addAll(Arrays.asList(part1)); |
| result.add(part2); |
| return result.toArray(new String[0]); |
| } |
| |
| public static void checkCompressedOopsErgo(String[] gcflags) throws Exception { |
| long maxHeapForCompressedOops = getMaxHeapForCompressedOops(gcflags); |
| |
| checkUseCompressedOops(gcflags, maxHeapForCompressedOops, true); |
| checkUseCompressedOops(gcflags, maxHeapForCompressedOops - 1, true); |
| checkUseCompressedOops(gcflags, maxHeapForCompressedOops + 1, false); |
| |
| // the use of HeapBaseMinAddress should not change the outcome |
| checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops, true); |
| checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops - 1, true); |
| checkUseCompressedOops(join(gcflags, "-XX:HeapBaseMinAddress=32G"), maxHeapForCompressedOops + 1, false); |
| |
| // use a different object alignment |
| maxHeapForCompressedOops = getMaxHeapForCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16")); |
| |
| checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops, true); |
| checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops - 1, true); |
| checkUseCompressedOops(join(gcflags, "-XX:ObjectAlignmentInBytes=16"), maxHeapForCompressedOops + 1, false); |
| |
| // use a different CompressedClassSpaceSize |
| String compressedClassSpaceSizeArg = "-XX:CompressedClassSpaceSize=" + 2 * getCompressedClassSpaceSize(); |
| maxHeapForCompressedOops = getMaxHeapForCompressedOops(join(gcflags, compressedClassSpaceSizeArg)); |
| |
| checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops, true); |
| checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops - 1, true); |
| checkUseCompressedOops(join(gcflags, compressedClassSpaceSizeArg), maxHeapForCompressedOops + 1, false); |
| } |
| |
| private static void checkUseCompressedOops(String[] args, long heapsize, boolean expectUseCompressedOops) throws Exception { |
| ArrayList<String> finalargs = new ArrayList<String>(); |
| finalargs.addAll(Arrays.asList(args)); |
| finalargs.add("-Xmx" + heapsize); |
| finalargs.add("-XX:+PrintFlagsFinal"); |
| finalargs.add("-version"); |
| |
| String output = expectValid(finalargs.toArray(new String[0])); |
| |
| boolean actualUseCompressedOops = getFlagBoolValue(" UseCompressedOops", output); |
| |
| Asserts.assertEQ(expectUseCompressedOops, actualUseCompressedOops); |
| } |
| |
| private static boolean getFlagBoolValue(String flag, String where) { |
| Matcher m = Pattern.compile(flag + "\\s+:?= (true|false)").matcher(where); |
| if (!m.find()) { |
| throw new RuntimeException("Could not find value for flag " + flag + " in output string"); |
| } |
| return m.group(1).equals("true"); |
| } |
| |
| private static String expect(String[] flags, boolean hasWarning, boolean hasError, int errorcode) throws Exception { |
| ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(flags); |
| OutputAnalyzer output = new OutputAnalyzer(pb.start()); |
| output.shouldHaveExitValue(errorcode); |
| return output.getStdout(); |
| } |
| |
| private static String expectValid(String[] flags) throws Exception { |
| return expect(flags, false, false, 0); |
| } |
| } |