8015324: Create tests for CDS feature

Wrote tests for use of CDS with ObjectAlignmentInBytes CL option

Reviewed-by: coleenp, ctornqvi, hseigel

hotspot/test/runtime/SharedArchiveFile/CdsDifferentObjectAlignment.java

@@ -0,0 +1,88 @@
+/*
+ * 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 CdsDifferentObjectAlignment
+ * @summary Testing CDS (class data sharing) using varying object alignment.
+ *          Using different object alignment for each dump/load pair.
+ *          This is a negative test; using  object alignment for loading that
+ *          is different from object alignment for creating a CDS file
+ *          should fail when loading.
+ * @library /testlibrary
+ */
+
+import com.oracle.java.testlibrary.*;
+
+public class CdsDifferentObjectAlignment {
+    public static void main(String[] args) throws Exception {
+        String nativeWordSize = System.getProperty("sun.arch.data.model");
+        if (!Platform.is64bit()) {
+            System.out.println("ObjectAlignmentInBytes for CDS is only " +
+                "supported on 64bit platforms; this plaform is " +
+                nativeWordSize);
+            System.out.println("Skipping the test");
+        } else {
+            createAndLoadSharedArchive(16, 64);
+            createAndLoadSharedArchive(64, 32);
+        }
+    }
+
+
+    // Parameters are object alignment expressed in bytes
+    private static void
+    createAndLoadSharedArchive(int createAlignment, int loadAlignment)
+    throws Exception {
+        String createAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
+            createAlignment;
+        String loadAlignmentArgument = "-XX:ObjectAlignmentInBytes=" +
+            loadAlignment;
+
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UnlockDiagnosticVMOptions",
+            "-XX:SharedArchiveFile=./sample.jsa",
+            "-Xshare:dump",
+            createAlignmentArgument);
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain("Loading classes to share");
+        output.shouldHaveExitValue(0);
+
+        pb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UnlockDiagnosticVMOptions",
+            "-XX:SharedArchiveFile=./sample.jsa",
+            "-Xshare:on",
+            loadAlignmentArgument,
+            "-version");
+
+        output = new OutputAnalyzer(pb.start());
+        String expectedErrorMsg =
+            String.format(
+            "The shared archive file's ObjectAlignmentInBytes of %d " +
+            "does not equal the current ObjectAlignmentInBytes of %d",
+            createAlignment,
+            loadAlignment);
+
+        output.shouldContain(expectedErrorMsg);
+        output.shouldHaveExitValue(1);
+    }
+}

hotspot/test/runtime/SharedArchiveFile/CdsSameObjectAlignment.java

@@ -0,0 +1,92 @@
+/*
+ * 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 CdsSameObjectAlignment
+ * @summary Testing CDS (class data sharing) using varying object alignment.
+ *          Using same object alignment for each dump/load pair
+ * @library /testlibrary
+ */
+
+import com.oracle.java.testlibrary.*;
+
+public class CdsSameObjectAlignment {
+    public static void main(String[] args) throws Exception {
+        String nativeWordSize = System.getProperty("sun.arch.data.model");
+        if (!Platform.is64bit()) {
+            System.out.println("ObjectAlignmentInBytes for CDS is only " +
+                "supported on 64bit platforms; this plaform is " +
+                nativeWordSize);
+            System.out.println("Skipping the test");
+        } else {
+            dumpAndLoadSharedArchive(8);
+            dumpAndLoadSharedArchive(16);
+            dumpAndLoadSharedArchive(32);
+            dumpAndLoadSharedArchive(64);
+        }
+    }
+
+    private static void
+    dumpAndLoadSharedArchive(int objectAlignmentInBytes) throws Exception {
+        String objectAlignmentArg = "-XX:ObjectAlignmentInBytes="
+            + objectAlignmentInBytes;
+        System.out.println("dumpAndLoadSharedArchive(): objectAlignmentInBytes = "
+            + objectAlignmentInBytes);
+
+        // create shared archive
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UnlockDiagnosticVMOptions",
+            "-XX:SharedArchiveFile=./sample.jsa",
+            "-Xshare:dump",
+            objectAlignmentArg);
+
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldContain("Loading classes to share");
+        output.shouldHaveExitValue(0);
+
+
+        // run using the shared archive
+        pb = ProcessTools.createJavaProcessBuilder(
+            "-XX:+UnlockDiagnosticVMOptions",
+            "-XX:SharedArchiveFile=./sample.jsa",
+            "-Xshare:on",
+            objectAlignmentArg,
+            "-version");
+
+        output = new OutputAnalyzer(pb.start());
+
+        try {
+            output.shouldContain("sharing");
+            output.shouldHaveExitValue(0);
+        } catch (RuntimeException e) {
+            // CDS uses absolute addresses for performance.
+            // It will try to reserve memory at a specific address;
+            // there is a chance such reservation will fail
+            // If it does, it is NOT considered a failure of the feature,
+            // rather a possible expected outcome, though not likely
+            output.shouldContain(
+                "Unable to reserve shared space at required address");
+            output.shouldHaveExitValue(1);
+        }
+    }
+}

hotspot/test/testlibrary/com/oracle/java/testlibrary/Platform.java

@@ -0,0 +1,62 @@
+/*
+ * 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.
+ */
+
+package com.oracle.java.testlibrary;
+
+public class Platform {
+  private static final String osName = System.getProperty("os.name");
+  private static final String dataModel = System.getProperty("sun.arch.data.model");
+  private static final String vmVersion = System.getProperty("java.vm.version");
+
+  public static boolean is64bit() {
+    return dataModel.equals("64");
+  }
+
+  public static boolean isSolaris() {
+    return osName.toLowerCase().startsWith("sunos");
+  }
+
+  public static boolean isWindows() {
+    return osName.toLowerCase().startsWith("win");
+  }
+
+  public static boolean isOSX() {
+    return osName.toLowerCase().startsWith("mac");
+  }
+
+  public static boolean isLinux() {
+    return osName.toLowerCase().startsWith("linux");
+  }
+
+  public static String getOsName() {
+    return osName;
+  }
+
+  public static boolean isDebugBuild() {
+    return vmVersion.toLowerCase().contains("debug");
+  }
+
+  public static String getVMVersion() {
+    return vmVersion;
+  }
+}

hotspot/test/testlibrary/com/oracle/java/testlibrary/ProcessTools.java

@@ -112,10 +112,8 @@ public final class ProcessTools {
    * @return String[] with platform specific arguments, empty if there are none
    */
   public static String[] getPlatformSpecificVMArgs() {
-    String osName = System.getProperty("os.name");
-    String dataModel = System.getProperty("sun.arch.data.model");
 
-    if (osName.equals("SunOS") && dataModel.equals("64")) {
+    if (Platform.is64bit() && Platform.isSolaris()) {
       return new String[] { "-d64" };
     }