--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/runtime/CompressedOops/UseCompressedOops.java Thu Sep 11 17:54:22 2014 -0700
@@ -0,0 +1,139 @@
+/*
+ * 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
+ * @bug 8022865
+ * @summary Tests for different combination of UseCompressedOops options
+ * @library /testlibrary
+ * @run main UseCompressedOops
+ */
+import java.util.ArrayList;
+import java.util.Collections;
+import com.oracle.java.testlibrary.*;
+
+public class UseCompressedOops {
+
+ public static void main(String[] args) throws Exception {
+
+ if (Platform.is64bit()) {
+ // Explicitly turn of compressed oops
+ testCompressedOops("-XX:-UseCompressedOops", "-Xmx32m")
+ .shouldNotContain("Compressed Oops")
+ .shouldHaveExitValue(0);
+
+ // Compressed oops should be on by default
+ testCompressedOops("-Xmx32m")
+ .shouldContain("Compressed Oops mode")
+ .shouldHaveExitValue(0);
+
+ // Explicly enabling compressed oops
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m")
+ .shouldContain("Compressed Oops mode")
+ .shouldHaveExitValue(0);
+
+ // Larger than 4gb heap should result in zero based with shift 3
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx5g")
+ .shouldContain("Zero based")
+ .shouldContain("Oop shift amount: 3")
+ .shouldHaveExitValue(0);
+
+ // Skip the following three test cases if we're on OSX or Solaris Sparc.
+ //
+ // OSX doesn't seem to care about HeapBaseMinAddress and Solaris Sparc
+ // puts the heap way up, forcing different behaviour.
+
+ if (!Platform.isOSX() && !(Platform.isSolaris() && Platform.isSparc())) {
+ // Small heap above 4gb should result in zero based with shift 3
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=4g")
+ .shouldContain("Zero based")
+ .shouldContain("Oop shift amount: 3")
+ .shouldHaveExitValue(0);
+
+ // Small heap above 32gb should result in non-zero based with shift 3
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m", "-XX:HeapBaseMinAddress=32g")
+ .shouldContain("Non-zero based")
+ .shouldContain("Oop shift amount: 3")
+ .shouldHaveExitValue(0);
+
+ // 32gb heap with heap base above 64gb and object alignment set to 16 bytes should result
+ // in non-zero based with shift 4
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16",
+ "-XX:HeapBaseMinAddress=64g")
+ .shouldContain("Non-zero based")
+ .shouldContain("Oop shift amount: 4")
+ .shouldHaveExitValue(0);
+ }
+
+ // Explicitly enabling compressed oops with 32gb heap should result a warning
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g")
+ .shouldContain("Max heap size too large for Compressed Oops")
+ .shouldHaveExitValue(0);
+
+ // 32gb heap should not result a warning
+ testCompressedOops("-Xmx32g")
+ .shouldNotContain("Max heap size too large for Compressed Oops")
+ .shouldHaveExitValue(0);
+
+ // Explicitly enabling compressed oops with 32gb heap and object
+ // alignment set to 8 byte should result a warning
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=8")
+ .shouldContain("Max heap size too large for Compressed Oops")
+ .shouldHaveExitValue(0);
+
+ // 64gb heap and object alignment set to 16 bytes should result in a warning
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx64g", "-XX:ObjectAlignmentInBytes=16")
+ .shouldContain("Max heap size too large for Compressed Oops")
+ .shouldHaveExitValue(0);
+
+ // 32gb heap with object alignment set to 16 bytes should result in zero based with shift 4
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32g", "-XX:ObjectAlignmentInBytes=16")
+ .shouldContain("Zero based")
+ .shouldContain("Oop shift amount: 4")
+ .shouldHaveExitValue(0);
+
+ } else {
+ // Compressed oops should only apply to 64bit platforms
+ testCompressedOops("-XX:+UseCompressedOops", "-Xmx32m")
+ .shouldContain("Unrecognized VM option 'UseCompressedOops'")
+ .shouldHaveExitValue(1);
+ }
+ }
+
+ private static OutputAnalyzer testCompressedOops(String... flags) throws Exception {
+ ArrayList<String> args = new ArrayList<>();
+
+ // Always run with these three:
+ args.add("-XX:+UnlockDiagnosticVMOptions");
+ args.add("-XX:+PrintCompressedOopsMode");
+ args.add("-Xms32m");
+
+ // Add the extra flags
+ Collections.addAll(args, flags);
+
+ args.add("-version");
+
+ ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args.toArray(new String[0]));
+ return new OutputAnalyzer(pb.start());
+ }
+}