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23 
24 /**
25  * @test
26  * @bug 4425852
27  * @author Robert Field
28  *
29  * @summary EventQueueDisconnectTest checks to see that
30  * VMDisconnectedException is never thrown before VMDisconnectEvent.
31  *
32  * Failure mode for this test is throwing VMDisconnectedException
33  * on vm.eventQueue().remove();
34  * Does not use a scaffold since we don't want that hiding the exception.
35  *
36  * @run build VMConnection
37  * @run compile -g EventQueueDisconnectTest.java
38  * @run driver EventQueueDisconnectTest
39  */
40 import com.sun.jdi.*;
41 import com.sun.jdi.event.*;
42 import com.sun.jdi.request.*;
43 
44 
45     /********** target program **********/
46 
47 class EventQueueDisconnectTarg {
main(String args[])48     public static void main(String args[]) {
49         for (int i=0; i < 10; ++i) {
50             Say(i);
51         }
52     }
Say(int what)53     static void Say(int what) {
54         System.out.println("Say " + what);
55     }
56 }
57 
58     /********** test program **********/
59 
60 public class EventQueueDisconnectTest {
61 
main(String args[])62     public static void main(String args[]) throws Exception {
63         VMConnection connection = new VMConnection(
64                                        "com.sun.jdi.CommandLineLaunch:",
65                                        VirtualMachine.TRACE_NONE);
66         connection.setConnectorArg("main", "EventQueueDisconnectTarg");
67         String debuggeeVMOptions = VMConnection.getDebuggeeVMOptions();
68         if (!debuggeeVMOptions.equals("")) {
69             if (connection.connectorArg("options").length() > 0) {
70                 throw new IllegalArgumentException("VM options in two places");
71             }
72             connection.setConnectorArg("options", debuggeeVMOptions);
73         }
74         VirtualMachine vm = connection.open();
75         EventRequestManager requestManager = vm.eventRequestManager();
76         MethodEntryRequest req = requestManager.createMethodEntryRequest();
77         req.addClassFilter("EventQueueDisconnectTarg");
78         req.setSuspendPolicy(EventRequest.SUSPEND_NONE);
79         req.enable();
80 
81         // We need to have the BE stop when VMDeath comes
82         VMDeathRequest ourVMDeathRequest = requestManager.createVMDeathRequest();
83         ourVMDeathRequest.setSuspendPolicy(EventRequest.SUSPEND_ALL);
84         ourVMDeathRequest.enable();
85 
86         vm.resume();
87         while (true) {
88             EventSet set = vm.eventQueue().remove();
89             Event event = set.eventIterator().nextEvent();
90 
91             System.err.println("EventSet with: " + event.getClass());
92 
93             if (event instanceof VMDisconnectEvent) {
94                 System.err.println("Disconnecting successfully");
95                 break;
96             }
97 
98             if (event instanceof VMDeathEvent) {
99                 System.err.println("Pausing after VM death");
100 
101                 // sleep a few seconds
102                 try {
103                     Thread.sleep(40 * 1000);
104                 } catch (InterruptedException exc) {
105                     // ignore
106                 }
107             }
108 
109             set.resume();
110         }
111 
112         System.err.println("EventQueueDisconnectTest passed");
113     }
114 }
115