Revert^8 "Make sure that const-class linkage is preserved."
Replaced two ReaderMutexLocks with WriterMutexLocks.
Removed some unnecessary debugging output.
Test: m test-art-host
Bug: 30627598
Original-Change-Id: Ie9b721464b4e9a5dcce8df8095548e983bba1fe8
This reverts commit 2c8c6b63da6ecb2ac701cc30f9b4fa4a8eea5cc8.
Change-Id: I3a1aeecf64e4b202cef61cceb248d48106a2f4a6
diff --git a/test/626-const-class-linking/src/RacyLoader.java b/test/626-const-class-linking/src/RacyLoader.java
new file mode 100644
index 0000000..9c164a3
--- /dev/null
+++ b/test/626-const-class-linking/src/RacyLoader.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+public class RacyLoader extends DefiningLoader {
+ static {
+ // For JVM, register as parallel capable.
+ // Android treats all class loaders as parallel capable and makes this a no-op.
+ registerAsParallelCapable();
+ }
+
+ private Object lock = new Object();
+ private int index = 0;
+ private int count;
+
+ private DefiningLoader[] defining_loaders;
+
+ public RacyLoader(ClassLoader parent, int count) {
+ super(parent);
+ this.count = count;
+ defining_loaders = new DefiningLoader[2];
+ for (int i = 0; i != defining_loaders.length; ++i) {
+ defining_loaders[i] = new DefiningLoader(parent);
+ }
+ }
+
+ protected Class<?> findClass(String name) throws ClassNotFoundException
+ {
+ if (name.equals("Test") || name.equals("Test3")) {
+ throw new Error("Unexpected RacyLoader.findClass(\"" + name + "\")");
+ }
+ return super.findClass(name);
+ }
+
+ protected Class<?> loadClass(String name, boolean resolve)
+ throws ClassNotFoundException
+ {
+ if (name.equals("Test") || name.equals("Test3")) {
+ int my_index = syncWithOtherInstances(count);
+ Class<?> result = defining_loaders[my_index & 1].loadClass(name, resolve);
+ syncWithOtherInstances(2 * count);
+ return result;
+ }
+ return super.loadClass(name, resolve);
+ }
+
+ private int syncWithOtherInstances(int limit) {
+ int my_index;
+ synchronized (lock) {
+ my_index = index;
+ ++index;
+ if (index != limit) {
+ do {
+ try {
+ lock.wait();
+ } catch (InterruptedException ie) {
+ throw new Error(ie);
+ }
+ } while (index < limit);
+ } else {
+ lock.notifyAll();
+ }
+ }
+ return my_index;
+ }
+}