undefect. CWE-407 — 63 sites patched across 27 ecosystems

Authors: russell@unturf.com · brackishbert@gmail.com · foxhop.net · TimeHexOn.com

Patches, unit tests, benchmarks, whitepaper, and outreach briefs.
Public domain — no copyright claimed. Use freely.

test/micro/org/openjdk/bench/java/util/UUIDBench.java

@@ -0,0 +1,85 @@
+/*
+ * Copyright (c) 2020, 2021, 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.openjdk.bench.java.util;
+
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
+
+import org.openjdk.jmh.annotations.*;
+
+@State(Scope.Thread)
+@OutputTimeUnit(TimeUnit.MICROSECONDS)
+@Fork(value = 3)
+@Warmup(iterations = 5, time = 1, timeUnit = TimeUnit.SECONDS)
+@Measurement(iterations = 5, time = 2, timeUnit = TimeUnit.SECONDS)
+public class UUIDBench {
+
+    @Param("20000")
+    private int size;
+
+    private byte[][] uuidBytes;
+
+    private UUID[] uuids;
+
+    private String[] uuidStrings;
+
+    private int index = 0;
+
+    @Setup
+    public void setup() {
+        uuidBytes = new byte[size][];
+        uuids = new UUID[size];
+        uuidStrings = new String[size];
+        java.util.Random r = new java.util.Random(0);
+        for (int i = 0; i < this.uuidStrings.length; i++) {
+            final UUID uuid = UUID.randomUUID();
+            this.uuidBytes[i] = new byte[16];
+            r.nextBytes(this.uuidBytes[i]);
+            this.uuids[i] = uuid;
+            this.uuidStrings[i] = uuid.toString();
+        }
+    }
+
+    @Setup(Level.Iteration)
+    public void setupIteration() {
+        index++;
+        if (index >= size) {
+            index = 0;
+        }
+    }
+
+    @Benchmark
+    public UUID fromString() {
+        return UUID.fromString(uuidStrings[index]);
+    }
+
+    @Benchmark
+    public String toString() {
+        return uuids[index].toString();
+    }
+
+    @Benchmark
+    public UUID fromType3Bytes() {
+        return UUID.nameUUIDFromBytes(uuidBytes[index]);
+    }
+}