1 files changed, 227 insertions, 0 deletions
diff --git a/test/952-invoke-custom/generator/TestInvokeCustomWithConcurrentThreads.java b/test/952-invoke-custom/generator/TestInvokeCustomWithConcurrentThreads.java
new file mode 100644
index 0000000000..5d5cae4147
--- /dev/null
+++ b/test/952-invoke-custom/generator/TestInvokeCustomWithConcurrentThreads.java
@@ -0,0 +1,227 @@
+/*
+ * 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.
+ */
+
+import com.android.jack.annotations.CalledByInvokeCustom;
+import com.android.jack.annotations.Constant;
+import com.android.jack.annotations.LinkerMethodHandle;
+import com.android.jack.annotations.MethodHandleKind;
+
+import java.lang.invoke.CallSite;
+import java.lang.invoke.ConstantCallSite;
+import java.lang.invoke.MethodHandle;
+import java.lang.invoke.MethodHandles;
+import java.lang.invoke.MethodType;
+
+import java.lang.Thread;
+import java.lang.ThreadLocal;
+import java.util.concurrent.atomic.AtomicInteger;
+
+public class TestInvokeCustomWithConcurrentThreads extends Thread {
+  private static final int NUMBER_OF_THREADS = 16;
+
+  private static final AtomicInteger nextIndex = new AtomicInteger(0);
+
+  private static final ThreadLocal<Integer> threadIndex =
+      new ThreadLocal<Integer>() {
+        @Override
+        protected Integer initialValue() {
+          return nextIndex.getAndIncrement();
+        }
+      };
+
+  // Array of call sites instantiated, one per thread
+  private static CallSite[] instantiated = new CallSite[NUMBER_OF_THREADS];
+
+  // Array of counters for how many times each instantiated call site is called
+  private static AtomicInteger[] called = new AtomicInteger[NUMBER_OF_THREADS];
+
+  // Array of call site indicies of which call site a thread invoked
+  private static AtomicInteger[] targetted = new AtomicInteger[NUMBER_OF_THREADS];
+
+  private TestInvokeCustomWithConcurrentThreads() {}
+
+  private static int getThreadIndex() {
+    return threadIndex.get().intValue();
+  }
+
+  public static int notUsed(int x) {
+    return x;
+  }
+
+  @Override
+  public void run() {
+    int x = setCalled(-1 /* argument dropped */);
+    notUsed(x);
+  }
+
+  @CalledByInvokeCustom(
+      invokeMethodHandle = @LinkerMethodHandle(kind = MethodHandleKind.INVOKE_STATIC,
+          enclosingType = TestInvokeCustomWithConcurrentThreads.class,
+          name = "linkerMethod",
+          argumentTypes = {MethodHandles.Lookup.class, String.class, MethodType.class}),
+      name = "setCalled",
+      returnType = int.class,
+      argumentTypes = {int.class})
+  private static int setCalled(int index) {
+    called[index].getAndIncrement();
+    targetted[getThreadIndex()].set(index);
+    return 0;
+  }
+
+  @SuppressWarnings("unused")
+  private static CallSite linkerMethod(MethodHandles.Lookup caller,
+                                       String name,
+                                       MethodType methodType) throws Throwable {
+    int threadIndex = getThreadIndex();
+    MethodHandle mh =
+        caller.findStatic(TestInvokeCustomWithConcurrentThreads.class, name, methodType);
+    assertEquals(methodType, mh.type());
+    assertEquals(mh.type().parameterCount(), 1);
+    mh = MethodHandles.insertArguments(mh, 0, threadIndex);
+    mh = MethodHandles.dropArguments(mh, 0, int.class);
+    assertEquals(mh.type().parameterCount(), 1);
+    assertEquals(methodType, mh.type());
+
+    // Sleep to try to get concurrent executions of this
+    // method. Multiple call sites should be created, but only one
+    // invoked.
+    Thread.sleep(125);
+
+    instantiated[getThreadIndex()] = new ConstantCallSite(mh);
+    return instantiated[getThreadIndex()];
+  }
+
+  public static void test() throws Throwable {
+    // Initialize counters for which call site gets invoked
+    for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+      called[i] = new AtomicInteger(0);
+      targetted[i] = new AtomicInteger(0);
+    }
+
+    // Run threads that each invoke-custom the call site
+    Thread [] threads = new Thread[NUMBER_OF_THREADS];
+    for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+      threads[i] = new TestInvokeCustomWithConcurrentThreads();
+      threads[i].start();
+    }
+
+    // Wait for all threads to complete
+    for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+      threads[i].join();
+    }
+
+    // Check one call site instance won
+    int winners = 0;
+    int votes = 0;
+    for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+      assertNotEquals(instantiated[i], null);
+      if (called[i].get() != 0) {
+        winners++;
+        votes += called[i].get();
+      }
+    }
+
+    System.out.println("Winners " + winners + " Votes " + votes);
+
+    // We assert this below but output details when there's an error as
+    // it's non-deterministic.
+    if (winners != 1) {
+      System.out.println("Threads did not the same call-sites:");
+      for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+        System.out.format(" Thread % 2d invoked call site instance #%02d\n",
+                          i, targetted[i].get());
+      }
+    }
+
+    // We assert this below but output details when there's an error as
+    // it's non-deterministic.
+    if (votes != NUMBER_OF_THREADS) {
+      System.out.println("Call-sites invocations :");
+      for (int i = 0; i < NUMBER_OF_THREADS; ++i) {
+        System.out.format(" Call site instance #%02d was invoked % 2d times\n",
+                          i, called[i].get());
+      }
+    }
+
+    assertEquals(winners, 1);
+    assertEquals(votes, NUMBER_OF_THREADS);
+  }
+
+  public static void assertTrue(boolean value) {
+    if (!value) {
+      throw new AssertionError("assertTrue value: " + value);
+    }
+  }
+
+  public static void assertEquals(byte b1, byte b2) {
+    if (b1 == b2) { return; }
+    throw new AssertionError("assertEquals b1: " + b1 + ", b2: " + b2);
+  }
+
+  public static void assertEquals(char c1, char c2) {
+    if (c1 == c2) { return; }
+    throw new AssertionError("assertEquals c1: " + c1 + ", c2: " + c2);
+  }
+
+  public static void assertEquals(short s1, short s2) {
+    if (s1 == s2) { return; }
+    throw new AssertionError("assertEquals s1: " + s1 + ", s2: " + s2);
+  }
+
+  public static void assertEquals(int i1, int i2) {
+    if (i1 == i2) { return; }
+    throw new AssertionError("assertEquals i1: " + i1 + ", i2: " + i2);
+  }
+
+  public static void assertEquals(long l1, long l2) {
+    if (l1 == l2) { return; }
+    throw new AssertionError("assertEquals l1: " + l1 + ", l2: " + l2);
+  }
+
+  public static void assertEquals(float f1, float f2) {
+    if (f1 == f2) { return; }
+    throw new AssertionError("assertEquals f1: " + f1 + ", f2: " + f2);
+  }
+
+  public static void assertEquals(double d1, double d2) {
+    if (d1 == d2) { return; }
+    throw new AssertionError("assertEquals d1: " + d1 + ", d2: " + d2);
+  }
+
+  public static void assertEquals(Object o, Object p) {
+    if (o == p) { return; }
+    if (o != null && p != null && o.equals(p)) { return; }
+    throw new AssertionError("assertEquals: o1: " + o + ", o2: " + p);
+  }
+
+  public static void assertNotEquals(Object o, Object p) {
+    if (o != p) { return; }
+    if (o != null && p != null && !o.equals(p)) { return; }
+    throw new AssertionError("assertNotEquals: o1: " + o + ", o2: " + p);
+  }
+
+  public static void assertEquals(String s1, String s2) {
+    if (s1 == s2) {
+      return;
+    }
+
+    if (s1 != null && s2 != null && s1.equals(s2)) {
+      return;
+    }
+
+    throw new AssertionError("assertEquals s1: " + s1 + ", s2: " + s2);
+  }
+}