add a test case for the JVM slaying our semaphores

[simgrid.git] / teshsuite / java / semaphore / SemaphoreGC.java

diff --git a/teshsuite/java/semaphore/SemaphoreGC.java b/teshsuite/java/semaphore/SemaphoreGC.java
new file mode 100644 (file)
index 0000000..224108a
--- /dev/null
+++ b/teshsuite/java/semaphore/SemaphoreGC.java
@@ -0,0 +1,56 @@
+/* Copyright (c) 2016. The SimGrid Team. All rights reserved.               */
+
+/* This program is free software; you can redistribute it and/or modify it
+ * under the terms of the license (GNU LGPL) which comes with this package. */
+
+/* This test ensures that the used semaphores are not garbage-collected while we still use it.
+ * This was reported as bug #... on gforge.
+ */
+
+package semaphore;
+
+import org.simgrid.msg.*;
+import org.simgrid.msg.Process;
+import org.simgrid.trace.Trace;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+class SemCreator extends Process {
+       Semaphore sem; 
+
+       SemCreator(Host h, String n){
+               super(h, n);
+       }
+
+       public void main(String[] args) throws MsgException{
+               int j; 
+               Msg.info("Creating 150 new Semaphores, yielding and triggering a GC after each");
+               for(j = 1; j <= 150; j++) {
+                       sem = new Semaphore(0);
+                       waitFor(10); 
+                       System.gc();
+               }
+               Msg.info("It worked, we survived. The test is passed.");
+       }
+}
+
+
+public class SemaphoreGC {
+       public static void main(String[] args) throws Exception {
+
+               Msg.init(args);
+               if (args.length < 1) {
+                       Msg.info("Usage: java -cp simgrid.jar:. semaphore.SemaphoreGC <deployment.xml>");
+                       System.exit(1);                 
+               }
+               Msg.createEnvironment(args[0]);
+
+               Host[] hosts = Host.all();
+               new SemCreator(hosts[0], "SemCreator").start();
+
+               Msg.run();
+       }
+
+}