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-rw-r--r--tests/partest-test/deadlock.scala44
1 files changed, 44 insertions, 0 deletions
diff --git a/tests/partest-test/deadlock.scala b/tests/partest-test/deadlock.scala
new file mode 100644
index 000000000..df561aff3
--- /dev/null
+++ b/tests/partest-test/deadlock.scala
@@ -0,0 +1,44 @@
+object Test {
+ class Lock
+ val lock1 = new Lock
+ val lock2 = new Lock
+
+ private[this] var took2: Boolean = false
+ def lock2Taken(): Unit = synchronized {
+ took2 = true
+ notify()
+ }
+ def tookLock2: Boolean = synchronized(took2)
+
+ val thread1 = new Thread {
+ override def run(): Unit = synchronized {
+ lock1.synchronized {
+ while (!tookLock2) wait()
+ lock2.synchronized {
+ println("thread1 in lock2!")
+ }
+ }
+ println("thread1, done!")
+ }
+ }
+
+ val thread2 = new Thread {
+ override def run(): Unit = synchronized {
+ lock2.synchronized {
+ lock2Taken()
+ lock1.synchronized {
+ println("thread2 in lock1!")
+ }
+ }
+ println("thread2, done!")
+ }
+ }
+
+ def main(args: Array[String]): Unit = {
+ thread1.start() // takes lock1 then sleeps 1s - tries to take lock2
+ thread2.start() // takes lock2 then sleeps 1s - tries to take lock1
+
+ thread1.join() // wait for threads to complete, can't because deadlock!
+ thread2.join()
+ }
+}