1 files changed, 67 insertions, 0 deletions
diff --git a/test/compiler/loopopts/UseCountedLoopSafepoints.java b/test/compiler/loopopts/UseCountedLoopSafepoints.java
new file mode 100644
index 000000000..66d81a4c1
--- /dev/null
+++ b/test/compiler/loopopts/UseCountedLoopSafepoints.java
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+/*
+ * Copyright (c) 2015, 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 6869327
+ * @summary Test that C2 flag UseCountedLoopSafepoints ensures a safepoint is kept in a CountedLoop
+ * @library /testlibrary
+ * @run main UseCountedLoopSafepoints
+ */
+
+import java.util.concurrent.atomic.AtomicLong;
+import com.oracle.java.testlibrary.ProcessTools;
+import com.oracle.java.testlibrary.OutputAnalyzer;
+
+public class UseCountedLoopSafepoints {
+    private static final AtomicLong _num = new AtomicLong(0);
+
+    // Uses the fact that an EnableBiasedLocking vmop will be started
+    // after 500ms, while we are still in the loop. If there is a
+    // safepoint in the counted loop, then we will reach safepoint
+    // very quickly. Otherwise SafepointTimeout will be hit.
+    public static void main (String args[]) throws Exception {
+        if (args.length == 1) {
+            final int loops = Integer.parseInt(args[0]);
+            for (int i = 0; i < loops; i++) {
+                _num.addAndGet(1);
+            }
+        } else {
+            ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+                    "-XX:+IgnoreUnrecognizedVMOptions",
+                    "-XX:-TieredCompilation",
+                    "-XX:+UseBiasedLocking",
+                    "-XX:BiasedLockingStartupDelay=500",
+                    "-XX:+SafepointTimeout",
+                    "-XX:SafepointTimeoutDelay=2000",
+                    "-XX:+UseCountedLoopSafepoints",
+                    "UseCountedLoopSafepoints",
+                    "2000000000"
+                    );
+            OutputAnalyzer output = new OutputAnalyzer(pb.start());
+            output.shouldNotContain("Timeout detected");
+            output.shouldHaveExitValue(0);
+        }
+    }
+}