| /* |
| * Copyright (c) 2013, 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 |
| * @key regression |
| * @key gc |
| * @bug 8027756 |
| * @library /testlibrary /testlibrary/whitebox |
| * @build TestHumongousCodeCacheRoots |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * @summary Humongous objects may have references from the code cache |
| * @run main TestHumongousCodeCacheRoots |
| */ |
| |
| import com.oracle.java.testlibrary.*; |
| import sun.hotspot.WhiteBox; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| class TestHumongousCodeCacheRootsHelper { |
| |
| static final int n = 1000000; |
| static final int[] AA = new int[n]; |
| static final int[] BB = new int[n]; |
| |
| public static void main(String args[]) throws Exception { |
| // do some work so that the compiler compiles this method, inlining the |
| // reference to the integer array (which is a humonguous object) into |
| // the code cache. |
| for(int i = 0; i < n; i++) { |
| AA[i] = 0; |
| BB[i] = 0; |
| } |
| // trigger a GC that checks that the verification code allows humongous |
| // objects with code cache roots; objects should be all live here. |
| System.gc(); |
| |
| // deoptimize everyhing: this should make all compiled code zombies. |
| WhiteBox wb = WhiteBox.getWhiteBox(); |
| wb.deoptimizeAll(); |
| |
| // trigger a GC that checks that the verification code allows humongous |
| // objects with code cache roots; objects should be all live here. |
| System.gc(); |
| |
| // wait a little for the code cache sweeper to try to clean up zombie nmethods |
| // and unregister the code roots. |
| try { Thread.sleep(5000); } catch (InterruptedException ex) { } |
| |
| // do some work on the arrays to make sure that they need to be live after the GCs |
| for(int i = 0; i < n; i++) { |
| AA[i] = 1; |
| BB[i] = 10; |
| } |
| |
| System.out.println(); |
| } |
| } |
| |
| public class TestHumongousCodeCacheRoots { |
| |
| /** |
| * Executes a class in a new VM process with the given 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; |
| } |
| |
| public static void runTest(String compiler, String[] other) throws Exception { |
| ArrayList<String> joined = new ArrayList<String>(); |
| joined.add(compiler); |
| joined.addAll(Arrays.asList(other)); |
| runWhiteBoxTest(joined.toArray(new String[0]), TestHumongousCodeCacheRootsHelper.class.getName(), |
| new String[] {}, false); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| final String[] baseArguments = new String[] { |
| "-XX:+UseG1GC", "-XX:G1HeapRegionSize=1M", "-Xmx100M", // make sure we get a humongous region |
| "-XX:+UnlockDiagnosticVMOptions", |
| "-XX:InitiatingHeapOccupancyPercent=1", // strong code root marking |
| "-XX:+G1VerifyHeapRegionCodeRoots", "-XX:+VerifyAfterGC", // make sure that verification is run |
| "-XX:NmethodSweepFraction=1", "-XX:NmethodSweepCheckInterval=1", // make the code cache sweep more predictable |
| }; |
| runTest("-client", baseArguments); |
| runTest("-server", baseArguments); |
| } |
| } |
| |