# HG changeset patch
# User ecaspole
# Date 1570204816 14400
# Node ID 26f0ed77734eaf10289ab6d0943e1dd4b1add4c7
# Parent  13f29c43b6c7cc436a911aa901cd759ad17c6397
8215521: add microbenchmark to measure AccessController.getContext
Reviewed-by: redestad, alanb

diff -r 13f29c43b6c7 -r 26f0ed77734e test/micro/org/openjdk/bench/java/security/GetContext.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/micro/org/openjdk/bench/java/security/GetContext.java	Fri Oct 04 12:00:16 2019 -0400
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2014, 2019 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.security;
+
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.BenchmarkMode;
+import org.openjdk.jmh.annotations.Mode;
+import org.openjdk.jmh.annotations.OutputTimeUnit;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Scope;
+import org.openjdk.jmh.annotations.State;
+
+import java.security.AccessControlContext;
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.util.concurrent.TimeUnit;
+
+/**
+ * Benchmark measuring AccessController.getContext
+ */
+@BenchmarkMode(Mode.AverageTime)
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+@State(Scope.Thread)
+public abstract class GetContext {
+
+    public static class Top extends GetContext {
+
+        @Benchmark
+        public AccessControlContext testNonPriv() {
+            return AccessController.getContext();
+        }
+
+        @Benchmark
+        public AccessControlContext testPriv() {
+            PrivilegedAction<AccessControlContext> pa = () -> AccessController.getContext();
+            return AccessController.doPrivileged(pa);
+        }
+    }
+
+    public static class Deep extends GetContext {
+
+        @Param({"2", "50"})
+        int depth;
+
+        private AccessControlContext recurse(int depth) {
+            if (depth > 0) {
+                return recurse(depth - 1);
+            } else {
+                return AccessController.getContext();
+            }
+        }
+
+        @Benchmark
+        public AccessControlContext testNonPrivRecurse() {
+            return recurse(depth);
+        }
+
+        @Benchmark
+        public AccessControlContext testPrivInline() {
+            PrivilegedAction<AccessControlContext> pa = () -> recurse(depth);
+            return AccessController.doPrivileged(pa);
+        }
+    }
+}