Add regression test for deadlock caused by Thread.getAllStackTraces

Also added stress test for Thread.getAllStackTraces. The test calls
Thread.getAllStackTraces from multiple threads to stress race
conditions which can cause deadlocks.

Bug: 18661622

Change-Id: Ideee7073fdcce784414808d08eca9ea310240073

3 files changed, 55 insertions, 0 deletions

diff --git a/test/129-ThreadGetId/expected.txt b/test/129-ThreadGetId/expected.txt
new file mode 100644
index 0000000000..134d8d0b47
--- /dev/null
+++ b/test/129-ThreadGetId/expected.txt
@@ -0,0 +1 @@
+Finishing
diff --git a/test/129-ThreadGetId/info.txt b/test/129-ThreadGetId/info.txt
new file mode 100644
index 0000000000..443062db96
--- /dev/null
+++ b/test/129-ThreadGetId/info.txt
@@ -0,0 +1 @@
+Regression test for b/18661622
diff --git a/test/129-ThreadGetId/src/Main.java b/test/129-ThreadGetId/src/Main.java
new file mode 100644
index 0000000000..9934bba95f
--- /dev/null
+++ b/test/129-ThreadGetId/src/Main.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2014 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.Map;
+
+public class Main implements Runnable {
+    static final int numberOfThreads = 5;
+    static final int totalOperations = 1000;
+
+    public static void main(String[] args) throws Exception {
+        final Thread[] threads = new Thread[numberOfThreads];
+        for (int t = 0; t < threads.length; t++) {
+            threads[t] = new Thread(new Main());
+            threads[t].start();
+        }
+        for (Thread t : threads) {
+            t.join();
+        }
+        System.out.println("Finishing");
+    }
+
+    public void test_getId() {
+        if (Thread.currentThread().getId() <= 0) {
+            System.out.println("current thread's ID is not positive");
+        }
+        // Check all the current threads for positive IDs.
+        Map<Thread, StackTraceElement[]> stMap = Thread.getAllStackTraces();
+        for (Thread thread : stMap.keySet()) {
+            if (thread.getId() <= 0) {
+                System.out.println("thread's ID is not positive: " + thread.getName());
+            }
+        }
+    }
+
+    public void run() {
+        for (int i = 0; i < totalOperations; ++i) {
+            test_getId();
+        }
+    }
+}