From c4af33fa1ff7e0c42f02613fa1a879e4613aaad7 Mon Sep 17 00:00:00 2001
From: Andreas Gampe <agampe@google.com>
Date: Fri, 2 Mar 2018 17:54:22 -0800
Subject: ART: Use try-lock for interface marking

Use ObjectTryLock for the performance optimization to help code
that uses classes for locks.

(cherry picked from commit 976b298a4e2d9e79983c1b131093de1a27163bf5)

Bug: 72204414
Test: art/test/testrunner/testrunner.py -b --host -t 170
Merged-In: Ic00de7bc15cb7e8369ff7c68cefcb3375f9df140
Change-Id: Ic00de7bc15cb7e8369ff7c68cefcb3375f9df140
---
 test/170-interface-init/src/Main.java | 50 +++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)
 create mode 100644 test/170-interface-init/src/Main.java

(limited to 'test/170-interface-init/src/Main.java')

diff --git a/test/170-interface-init/src/Main.java b/test/170-interface-init/src/Main.java
new file mode 100644
index 0000000000..62f6c5cab2
--- /dev/null
+++ b/test/170-interface-init/src/Main.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import java.util.concurrent.CountDownLatch;
+
+interface I {
+}
+
+class A implements I {
+    static int x = (int)(10*Math.random());  // Suppress compile-time initialization.
+}
+
+public class Main {
+    public static void main(String[] args) throws Exception {
+        final CountDownLatch first = new CountDownLatch(1);
+        final CountDownLatch second = new CountDownLatch(1);
+
+        new Thread(new Runnable() {
+            public void run() {
+                try {
+                    synchronized(I.class) {
+                        first.countDown();
+                        second.await();
+                    }
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+        }).start();
+
+        first.await();
+        new A();  // Will initialize A.
+        second.countDown();
+
+        System.out.println("Done.");
+    }
+}
-- 
cgit v1.2.3-59-g8ed1b