ART: Add regression test

This adds a test for CL I624c0f91676d9baaada6f33be9d7091f68d57535.

Change-Id: Ib9ea1400082ad03c4355983d95268e084c0b6a6e

4 files changed, 127 insertions, 0 deletions

diff --git a/test/522-checker-regression-monitor-exit/expected.txt b/test/522-checker-regression-monitor-exit/expected.txt
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/test/522-checker-regression-monitor-exit/expected.txt
diff --git a/test/522-checker-regression-monitor-exit/info.txt b/test/522-checker-regression-monitor-exit/info.txt
new file mode 100644
index 0000000000..7cfc963090
--- /dev/null
+++ b/test/522-checker-regression-monitor-exit/info.txt
@@ -0,0 +1,3 @@
+Regression test for removal of monitor-exit due to lack of specified side-effects.
+The test invokes a synchronized version of Object.hashCode in multiple threads.
+If monitor-exit is removed, the following threads will get stuck and timeout.
\ No newline at end of file
diff --git a/test/522-checker-regression-monitor-exit/smali/Test.smali b/test/522-checker-regression-monitor-exit/smali/Test.smali
new file mode 100644
index 0000000000..c8e91984e0
--- /dev/null
+++ b/test/522-checker-regression-monitor-exit/smali/Test.smali
@@ -0,0 +1,40 @@
+#
+# Copyright (C) 2015 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.
+
+.class public LTest;
+
+.super Ljava/lang/Object;
+
+## CHECK-START: int Test.synchronizedHashCode(java.lang.Object) dead_code_elimination (before)
+## CHECK:         MonitorOperation [<<Param:l\d+>>] kind:enter
+## CHECK:         MonitorOperation [<<Param>>]      kind:exit
+
+## CHECK-START: int Test.synchronizedHashCode(java.lang.Object) dead_code_elimination (after)
+## CHECK:         MonitorOperation [<<Param:l\d+>>] kind:enter
+## CHECK:         MonitorOperation [<<Param>>]      kind:exit
+
+.method public static synchronizedHashCode(Ljava/lang/Object;)I
+  .registers 2
+
+  monitor-enter p0
+  invoke-virtual {p0}, Ljava/lang/Object;->hashCode()I
+  move-result v0
+
+  # Must not get removed by DCE.
+  monitor-exit p0
+
+  return v0
+
+.end method
diff --git a/test/522-checker-regression-monitor-exit/src/Main.java b/test/522-checker-regression-monitor-exit/src/Main.java
new file mode 100644
index 0000000000..c85ac966ad
--- /dev/null
+++ b/test/522-checker-regression-monitor-exit/src/Main.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2015 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.lang.reflect.Method;
+import java.lang.reflect.Type;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Future;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.CancellationException;
+import java.util.concurrent.TimeoutException;
+
+public class Main {
+
+  // Workaround for b/18051191.
+  class InnerClass {}
+
+  private static class HashCodeQuery implements Callable<Integer> {
+    public HashCodeQuery(Object obj) {
+      m_obj = obj;
+    }
+
+    public Integer call() {
+      Integer result;
+      try {
+        Class<?> c = Class.forName("Test");
+        Method m = c.getMethod("synchronizedHashCode", new Class[] { Object.class });
+        result = (Integer) m.invoke(null, m_obj);
+      } catch (Exception e) {
+        System.err.println("Hash code query exception");
+        e.printStackTrace();
+        result = -1;
+      }
+      return result;
+    }
+
+    private Object m_obj;
+    private int m_index;
+  }
+
+  public static void main(String args[]) throws Exception {
+    Object obj = new Object();
+    int numThreads = 10;
+
+    ExecutorService pool = Executors.newFixedThreadPool(numThreads);
+
+    List<HashCodeQuery> queries = new ArrayList<HashCodeQuery>(numThreads);
+    for (int i = 0; i < numThreads; ++i) {
+      queries.add(new HashCodeQuery(obj));
+    }
+
+    try {
+      List<Future<Integer>> results = pool.invokeAll(queries, 5, TimeUnit.SECONDS);
+
+      int hash = obj.hashCode();
+      for (int i = 0; i < numThreads; ++i) {
+        int result = results.get(i).get();
+        if (hash != result) {
+          throw new Error("Query #" + i + " wrong. Expected " + hash + ", got " + result);
+        }
+      }
+      pool.shutdown();
+    } catch (CancellationException ex) {
+      System.err.println("Job timeout");
+      System.exit(1);
+    }
+  }
+}