--- /dev/null	2017-07-07 09:32:09.000000000 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.debug/src/org/graalvm/compiler/debug/UniquePathUtilities.java	2017-07-07 09:32:09.000000000 -0700
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2016, 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 org.graalvm.compiler.debug;
+
+import java.io.IOException;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.HashMap;
+import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.graalvm.compiler.options.OptionKey;
+import org.graalvm.compiler.options.OptionValues;
+
+public class UniquePathUtilities {
+
+    private static final AtomicLong globalTimeStamp = new AtomicLong();
+    /**
+     * This generates a per thread persistent id to aid mapping related dump files with each other.
+     */
+    private static final ThreadLocal<PerThreadSequence> threadDumpId = new ThreadLocal<>();
+    private static final AtomicInteger dumpId = new AtomicInteger();
+
+    static class PerThreadSequence {
+        final int threadID;
+        HashMap<String, Integer> sequences = new HashMap<>(2);
+
+        PerThreadSequence(int threadID) {
+            this.threadID = threadID;
+        }
+
+        String generateID(String extension) {
+            Integer box = sequences.get(extension);
+            if (box == null) {
+                sequences.put(extension, 1);
+                return Integer.toString(threadID);
+            } else {
+                sequences.put(extension, box + 1);
+                return Integer.toString(threadID) + '-' + box;
+            }
+        }
+    }
+
+    private static String getThreadDumpId(String extension) {
+        PerThreadSequence id = threadDumpId.get();
+        if (id == null) {
+            id = new PerThreadSequence(dumpId.incrementAndGet());
+            threadDumpId.set(id);
+        }
+        return id.generateID(extension);
+    }
+
+    public static String formatExtension(String ext) {
+        if (ext == null || ext.length() == 0) {
+            return "";
+        }
+        return "." + ext;
+    }
+
+    public static long getGlobalTimeStamp() {
+        if (globalTimeStamp.get() == 0) {
+            globalTimeStamp.compareAndSet(0, System.currentTimeMillis());
+        }
+        return globalTimeStamp.get();
+    }
+
+    /**
+     * Generates a {@link Path} using the format "%s-%d_%d%s" with the {@code baseNameOption}, a
+     * {@link #getGlobalTimeStamp() global timestamp} , {@link #getThreadDumpId a per thread unique
+     * id} and an optional {@code extension}.
+     *
+     * @return the output file path or null if the flag is null
+     */
+    public static Path getPath(OptionValues options, OptionKey<String> option, String extension) throws IOException {
+        return getPath(options, option, extension, true);
+    }
+
+    /**
+     * Generate a {@link Path} using the format "%s-%d_%s" with the {@code baseNameOption}, a
+     * {@link #getGlobalTimeStamp() global timestamp} and an optional {@code extension} .
+     *
+     * @return the output file path or null if the flag is null
+     */
+    public static Path getPathGlobal(OptionValues options, OptionKey<String> baseNameOption, String extension) throws IOException {
+        return getPath(options, baseNameOption, extension, false);
+    }
+
+    private static Path getPath(OptionValues options, OptionKey<String> baseNameOption, String extension, boolean includeThreadId) throws IOException {
+        if (baseNameOption.getValue(options) == null) {
+            return null;
+        }
+        String ext = formatExtension(extension);
+        final String name = includeThreadId
+                        ? String.format("%s-%d_%s%s", baseNameOption.getValue(options), getGlobalTimeStamp(), getThreadDumpId(ext), ext)
+                        : String.format("%s-%d%s", baseNameOption.getValue(options), getGlobalTimeStamp(), ext);
+        Path result = Paths.get(name);
+        if (result.isAbsolute()) {
+            return result;
+        }
+        Path dumpDir = DebugOptions.getDumpDirectory(options);
+        return dumpDir.resolve(name).normalize();
+    }
+}