| /** |
| * @test |
| * @bug 6459476 |
| * @summary Debuggee is blocked, looks like running |
| * |
| * @author jjh |
| * |
| * @run build TestScaffold VMConnection TargetListener TargetAdapter |
| * @run compile -g InterruptHangTest.java |
| * @run main InterruptHangTest |
| */ |
| import com.sun.jdi.*; |
| import com.sun.jdi.event.*; |
| import com.sun.jdi.request.*; |
| |
| /* |
| * Debuggee has two threads. Debugger keeps stepping in |
| * the first thread. The second thread keeps interrupting the first |
| * thread. If a long time goes by with the debugger not getting |
| * a step event, the test fails. |
| */ |
| class InterruptHangTarg { |
| public static String sync = "sync"; |
| public static void main(String[] args){ |
| int answer = 0; |
| System.out.println("Howdy!"); |
| Interruptor interruptorThread = new Interruptor(Thread.currentThread()); |
| |
| synchronized(sync) { |
| interruptorThread.start(); |
| try { |
| sync.wait(); |
| } catch (InterruptedException ee) { |
| System.out.println("Debuggee interruptee: interrupted before starting loop"); |
| } |
| } |
| |
| // Debugger will keep stepping thru this loop |
| for (int ii = 0; ii < 200; ii++) { |
| answer++; |
| try { |
| // Give other thread a chance to run |
| Thread.sleep(100); |
| } catch (InterruptedException ee) { |
| System.out.println("Debuggee interruptee: interrupted at iteration: " |
| + ii); |
| } |
| } |
| // Kill the interrupter thread |
| interruptorThread.interrupt(); |
| System.out.println("Goodbye from InterruptHangTarg!"); |
| } |
| } |
| |
| class Interruptor extends Thread { |
| Thread interruptee; |
| Interruptor(Thread interruptee) { |
| this.interruptee = interruptee; |
| } |
| |
| public void run() { |
| synchronized(InterruptHangTarg.sync) { |
| InterruptHangTarg.sync.notify(); |
| } |
| |
| int ii = 0; |
| while(true) { |
| ii++; |
| interruptee.interrupt(); |
| try { |
| Thread.sleep(10); |
| } catch (InterruptedException ee) { |
| System.out.println("Debuggee Interruptor: finished after " + |
| ii + " iterrupts"); |
| break; |
| } |
| |
| } |
| } |
| } |
| |
| /********** test program **********/ |
| |
| public class InterruptHangTest extends TestScaffold { |
| ThreadReference mainThread; |
| Thread timerThread; |
| String sync = "sync"; |
| static int nSteps = 0; |
| |
| InterruptHangTest (String args[]) { |
| super(args); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new InterruptHangTest(args).startTests(); |
| } |
| |
| /********** event handlers **********/ |
| |
| public void stepCompleted(StepEvent event) { |
| synchronized(sync) { |
| nSteps++; |
| } |
| println("Got StepEvent " + nSteps + " at line " + |
| event.location().method() + ":" + |
| event.location().lineNumber()); |
| if (nSteps == 1) { |
| timerThread.start(); |
| } |
| } |
| |
| /********** test core **********/ |
| |
| protected void runTests() throws Exception { |
| BreakpointEvent bpe = startToMain("InterruptHangTarg"); |
| mainThread = bpe.thread(); |
| EventRequestManager erm = vm().eventRequestManager(); |
| |
| /* |
| * Set event requests |
| */ |
| StepRequest request = erm.createStepRequest(mainThread, |
| StepRequest.STEP_LINE, |
| StepRequest.STEP_OVER); |
| request.enable(); |
| |
| // Will be started by the step event handler |
| timerThread = new Thread("test timer") { |
| public void run() { |
| int mySteps = 0; |
| while (true) { |
| try { |
| Thread.sleep(20000); |
| synchronized(sync) { |
| System.out.println("steps = " + nSteps); |
| if (mySteps == nSteps) { |
| // no step for 10 secs |
| failure("failure: Debuggee appears to be hung"); |
| vm().exit(-1); |
| break; |
| } |
| } |
| mySteps = nSteps; |
| } catch (InterruptedException ee) { |
| break; |
| } |
| } |
| } |
| }; |
| |
| /* |
| * resume the target listening for events |
| */ |
| |
| listenUntilVMDisconnect(); |
| timerThread.interrupt(); |
| |
| /* |
| * deal with results of test |
| * if anything has called failure("foo") testFailed will be true |
| */ |
| if (!testFailed) { |
| println("InterruptHangTest: passed"); |
| } else { |
| throw new Exception("InterruptHangTest: failed"); |
| } |
| } |
| } |