--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/gc/g1/TestHumongousCodeCacheRoots.java	Thu Nov 07 15:17:10 2013 +0100
@@ -0,0 +1,143 @@
+/*
+ * 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);
+  }
+}
+