tests/kaffe/ProcessClassLockTest.java

   1 /**
   2  * a test to ensure we do upcalls to static initializers properly.
   3  *
   4  * @author Godmar Back <gback@cs.utah.edu>
   5  */
   6 class Base {
   7     static {
   8         try {
   9             Thread.sleep(5000);
  10         } catch (Exception e) {
  11             System.out.println(e);
  12         }
  13     }
  14 }
  15
  16 class Sub extends Base {
  17 }
  18
  19 public class ProcessClassLockTest
  20 {
  21     public static void main(String av[]) throws Exception {
  22         // a watchdog thread that kills us off after 2.5 sec
  23         new Thread() {
  24             public void run() {
  25                 try {
  26                     Thread.sleep(2500);
  27                     System.out.println("sorry, you timed out");
  28                     System.exit(-1);
  29                 } catch (Exception e) {
  30                     System.out.println(e);
  31                 }
  32             }
  33         }.start();
  34
  35         // a thread that will load Sub and Base
  36         new Thread() {
  37             public void run() {
  38                 try {
  39                     Class.forName("Sub");
  40                 } catch (Throwable t) {
  41                     System.out.println(t);
  42                 }
  43             }
  44         }.start();
  45
  46         // get thread 2 going
  47         Thread.sleep(1000);
  48
  49         /* this thread should be unaffected by the fact that thread 2
  50          * sleeps in the static initializer of Base
  51          */
  52         new Thread() {
  53             public void run() {
  54                 try {
  55                     Class.forName("this_class_does_not_exist");
  56                 } catch (Throwable t) {
  57                     System.out.println(t);
  58                 }
  59                 System.exit(0);
  60             }
  61         }.start();
  62     }
  63 }
  64
  65 /* Expected Output:
  66 java.lang.ClassNotFoundException: this_class_does_not_exist
  67 */