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+/*
+ * Copyright (c) 2014, 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 TestG1TraceEagerReclaimHumongousObjects
+ * @bug 8058801 8048179
+ * @summary Ensure that the output for a G1TraceEagerReclaimHumongousObjects
+ * includes the expected necessary messages.
+ * @key gc
+ * @library /testlibrary
+ */
+
+import com.oracle.java.testlibrary.ProcessTools;
+import com.oracle.java.testlibrary.OutputAnalyzer;
+import java.util.LinkedList;
+
+public class TestG1TraceEagerReclaimHumongousObjects {
+ public static void main(String[] args) throws Exception {
+ testGCLogs();
+ testHumongousObjectGCLogs();
+ }
+
+ private static void testGCLogs() throws Exception {
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
+ "-Xms128M",
+ "-Xmx128M",
+ "-Xmn16M",
+ "-XX:G1HeapRegionSize=1M",
+ "-XX:+PrintGC",
+ "-XX:+UnlockExperimentalVMOptions",
+ "-XX:G1LogLevel=finest",
+ "-XX:+G1TraceEagerReclaimHumongousObjects",
+ GCTest.class.getName());
+
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+ // As G1EagerReclaimHumongousObjects is set(default), below logs should be displayed.
+ // And GCTest doesn't have humongous objects, so values should be zero.
+ output.shouldContain("[Humongous Reclaim");
+ output.shouldContain("[Humongous Total: 0]");
+ output.shouldContain("[Humongous Candidate: 0]");
+ output.shouldContain("[Humongous Reclaimed: 0]");
+
+ output.shouldHaveExitValue(0);
+ }
+
+ private static void testHumongousObjectGCLogs() throws Exception {
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+UseG1GC",
+ "-Xms128M",
+ "-Xmx128M",
+ "-Xmn16M",
+ "-XX:G1HeapRegionSize=1M",
+ "-XX:+PrintGC",
+ "-XX:+UnlockExperimentalVMOptions",
+ "-XX:G1LogLevel=finest",
+ "-XX:+G1TraceEagerReclaimHumongousObjects",
+ GCWithHumongousObjectTest.class.getName());
+
+ OutputAnalyzer output = new OutputAnalyzer(pb.start());
+
+ // As G1ReclaimDeadHumongousObjectsAtYoungGC is set(default), below logs should be displayed.
+ output.shouldContain("[Humongous Reclaim");
+ output.shouldContain("[Humongous Total");
+ output.shouldContain("[Humongous Candidate");
+ output.shouldContain("[Humongous Reclaimed");
+
+ // As G1TraceReclaimDeadHumongousObjectsAtYoungGC is set and GCWithHumongousObjectTest has humongous objects,
+ // these logs should be displayed.
+ output.shouldContain("Live humongous");
+ output.shouldContain("Dead humongous region");
+ output.shouldHaveExitValue(0);
+ }
+
+ static class GCTest {
+ private static byte[] garbage;
+
+ public static void main(String [] args) {
+ System.out.println("Creating garbage");
+ // create 128MB of garbage. This should result in at least one GC
+ for (int i = 0; i < 1024; i++) {
+ garbage = new byte[128 * 1024];
+ }
+ System.out.println("Done");
+ }
+ }
+
+ static class GCWithHumongousObjectTest {
+
+ public static final int M = 1024*1024;
+ public static LinkedList<Object> garbageList = new LinkedList<Object>();
+ // A large object referenced by a static.
+ static int[] filler = new int[10 * M];
+
+ public static void genGarbage() {
+ for (int i = 0; i < 32*1024; i++) {
+ garbageList.add(new int[100]);
+ }
+ garbageList.clear();
+ }
+
+ public static void main(String[] args) {
+
+ int[] large = new int[M];
+ Object ref = large;
+
+ System.out.println("Creating garbage");
+ for (int i = 0; i < 100; i++) {
+ // A large object that will be reclaimed eagerly.
+ large = new int[6*M];
+ genGarbage();
+ // Make sure that the compiler cannot completely remove
+ // the allocation of the large object until here.
+ System.out.println(large);
+ }
+
+ // Keep the reference to the first object alive.
+ System.out.println(ref);
+ System.out.println("Done");
+ }
+ }
+}