8064669: compiler/whitebox/AllocationCodeBlobTest.java crashes / asserts

Reviewed-by: kvn, anoll

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

@@ -0,0 +1,64 @@
+/*
+ * 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.
+ */
+
+package com.oracle.java.testlibrary;
+
+import java.util.Objects;
+
+/**
+ * Class which runs another Runnable in infinite loop with certain pauses
+ * between cycles.
+ */
+public class InfiniteLoop implements Runnable {
+    private final Runnable target;
+    private final long mills;
+
+
+    /**
+     * @param target a target to run in a loop
+     * @param mills  the length of pause time in milliseconds
+     * @throws NullPointerException if target is null
+     * @throws IllegalArgumentException if the value of millis is negative
+     */
+    public InfiniteLoop(Runnable target, long mills) {
+        Objects.requireNonNull(target);
+        if (mills < 0) {
+            throw new IllegalArgumentException("mills < 0");
+        }
+        this.target = target;
+        this.mills = mills;
+    }
+
+    @Override
+    public void run() {
+        try {
+            while (true) {
+                target.run();
+                Thread.sleep(mills);
+            }
+        } catch (InterruptedException e) {
+            Thread.currentThread().interrupt();
+            throw new Error(e);
+        }
+    }
+}