J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /** |
| 2 | * @test |
| 3 | * @bug 6459476 |
| 4 | * @summary Debuggee is blocked, looks like running |
| 5 | * |
| 6 | * @author jjh |
| 7 | * |
| 8 | * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| 9 | * @run compile -g InterruptHangTest.java |
| 10 | * @run main InterruptHangTest |
| 11 | */ |
| 12 | import com.sun.jdi.*; |
| 13 | import com.sun.jdi.event.*; |
| 14 | import com.sun.jdi.request.*; |
| 15 | |
| 16 | /* |
| 17 | * Debuggee has two threads. Debugger keeps stepping in |
| 18 | * the first thread. The second thread keeps interrupting the first |
| 19 | * thread. If a long time goes by with the debugger not getting |
| 20 | * a step event, the test fails. |
| 21 | */ |
| 22 | class InterruptHangTarg { |
| 23 | public static String sync = "sync"; |
| 24 | public static void main(String[] args){ |
| 25 | int answer = 0; |
| 26 | System.out.println("Howdy!"); |
| 27 | Interruptor interruptorThread = new Interruptor(Thread.currentThread()); |
| 28 | |
| 29 | synchronized(sync) { |
| 30 | interruptorThread.start(); |
| 31 | try { |
| 32 | sync.wait(); |
| 33 | } catch (InterruptedException ee) { |
| 34 | System.out.println("Debuggee interruptee: interrupted before starting loop"); |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | // Debugger will keep stepping thru this loop |
| 39 | for (int ii = 0; ii < 200; ii++) { |
| 40 | answer++; |
| 41 | try { |
| 42 | // Give other thread a chance to run |
| 43 | Thread.sleep(100); |
| 44 | } catch (InterruptedException ee) { |
| 45 | System.out.println("Debuggee interruptee: interrupted at iteration: " |
| 46 | + ii); |
| 47 | } |
| 48 | } |
| 49 | // Kill the interrupter thread |
| 50 | interruptorThread.interrupt(); |
| 51 | System.out.println("Goodbye from InterruptHangTarg!"); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | class Interruptor extends Thread { |
| 56 | Thread interruptee; |
| 57 | Interruptor(Thread interruptee) { |
| 58 | this.interruptee = interruptee; |
| 59 | } |
| 60 | |
| 61 | public void run() { |
| 62 | synchronized(InterruptHangTarg.sync) { |
| 63 | InterruptHangTarg.sync.notify(); |
| 64 | } |
| 65 | |
| 66 | int ii = 0; |
| 67 | while(true) { |
| 68 | ii++; |
| 69 | interruptee.interrupt(); |
| 70 | try { |
| 71 | Thread.sleep(10); |
| 72 | } catch (InterruptedException ee) { |
| 73 | System.out.println("Debuggee Interruptor: finished after " + |
| 74 | ii + " iterrupts"); |
| 75 | break; |
| 76 | } |
| 77 | |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | /********** test program **********/ |
| 83 | |
| 84 | public class InterruptHangTest extends TestScaffold { |
| 85 | ThreadReference mainThread; |
| 86 | Thread timerThread; |
| 87 | String sync = "sync"; |
| 88 | static int nSteps = 0; |
| 89 | |
| 90 | InterruptHangTest (String args[]) { |
| 91 | super(args); |
| 92 | } |
| 93 | |
| 94 | public static void main(String[] args) throws Exception { |
| 95 | new InterruptHangTest(args).startTests(); |
| 96 | } |
| 97 | |
| 98 | /********** event handlers **********/ |
| 99 | |
| 100 | public void stepCompleted(StepEvent event) { |
| 101 | synchronized(sync) { |
| 102 | nSteps++; |
| 103 | } |
| 104 | println("Got StepEvent " + nSteps + " at line " + |
| 105 | event.location().method() + ":" + |
| 106 | event.location().lineNumber()); |
| 107 | if (nSteps == 1) { |
| 108 | timerThread.start(); |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | /********** test core **********/ |
| 113 | |
| 114 | protected void runTests() throws Exception { |
| 115 | BreakpointEvent bpe = startToMain("InterruptHangTarg"); |
| 116 | mainThread = bpe.thread(); |
| 117 | EventRequestManager erm = vm().eventRequestManager(); |
| 118 | |
| 119 | /* |
| 120 | * Set event requests |
| 121 | */ |
| 122 | StepRequest request = erm.createStepRequest(mainThread, |
| 123 | StepRequest.STEP_LINE, |
| 124 | StepRequest.STEP_OVER); |
| 125 | request.enable(); |
| 126 | |
| 127 | // Will be started by the step event handler |
| 128 | timerThread = new Thread("test timer") { |
| 129 | public void run() { |
| 130 | int mySteps = 0; |
| 131 | while (true) { |
| 132 | try { |
| 133 | Thread.sleep(20000); |
| 134 | synchronized(sync) { |
| 135 | System.out.println("steps = " + nSteps); |
| 136 | if (mySteps == nSteps) { |
| 137 | // no step for 10 secs |
| 138 | failure("failure: Debuggee appears to be hung"); |
| 139 | vm().exit(-1); |
| 140 | break; |
| 141 | } |
| 142 | } |
| 143 | mySteps = nSteps; |
| 144 | } catch (InterruptedException ee) { |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | } |
| 149 | }; |
| 150 | |
| 151 | /* |
| 152 | * resume the target listening for events |
| 153 | */ |
| 154 | |
| 155 | listenUntilVMDisconnect(); |
| 156 | timerThread.interrupt(); |
| 157 | |
| 158 | /* |
| 159 | * deal with results of test |
| 160 | * if anything has called failure("foo") testFailed will be true |
| 161 | */ |
| 162 | if (!testFailed) { |
| 163 | println("InterruptHangTest: passed"); |
| 164 | } else { |
| 165 | throw new Exception("InterruptHangTest: failed"); |
| 166 | } |
| 167 | } |
| 168 | } |