/** Redirect a VMs output and error streams to System.out and System.err */
protected void redirectStreams(VirtualMachine vm) {
MessageSiphon ms = new MessageSiphon(process.getErrorStream(), this);
errThread = ms.getThread();
outThread = new StreamRedirectThread("VM output reader", process.getInputStream(), System.out);
errThread.start();
outThread.start();
}
/**
* Generate the trace. Enable events, start thread to display events, start threads to forward
* remote error and output streams, resume the remote VM, wait for the final event, and shutdown.
*/
protected void generateTrace() {
// vm.setDebugTraceMode(debugTraceMode);
// vm.setDebugTraceMode(VirtualMachine.TRACE_ALL);
// vm.setDebugTraceMode(VirtualMachine.TRACE_NONE); // formerly, seems to have no effect
// For internal debugging
PrintWriter writer = null;
// Calling this seems to set something internally to make the
// Eclipse JDI wake up. Without it, an ObjectCollectedException
// is thrown on excReq.enable(). No idea why this works,
// but at least exception handling has returned. (Suspect that it may
// block until all or at least some threads are available, meaning
// that the app has launched and we have legit objects to talk to).
vm.allThreads();
// The bug may not have been noticed because the test suite waits for
// a thread to be available, and queries it by calling allThreads().
// See org.eclipse.debug.jdi.tests.AbstractJDITest for the example.
EventRequestManager mgr = vm.eventRequestManager();
// get only the uncaught exceptions
ExceptionRequest excReq = mgr.createExceptionRequest(null, false, true);
// System.out.println(excReq);
// this version reports all exceptions, caught or uncaught
// ExceptionRequest excReq = mgr.createExceptionRequest(null, true, true);
// suspend so we can step
excReq.setSuspendPolicy(EventRequest.SUSPEND_ALL);
// excReq.setSuspendPolicy(EventRequest.SUSPEND_EVENT_THREAD);
// excReq.setSuspendPolicy(EventRequest.SUSPEND_NONE); // another option?
excReq.enable();
Thread eventThread =
new Thread() {
public void run() {
try {
boolean connected = true;
while (connected) {
EventQueue eventQueue = vm.eventQueue();
// remove() blocks until event(s) available
EventSet eventSet = eventQueue.remove();
// listener.vmEvent(eventSet);
for (Event event : eventSet) {
// System.out.println("EventThread.handleEvent -> " + event);
if (event instanceof VMStartEvent) {
vm.resume();
} else if (event instanceof ExceptionEvent) {
// for (ThreadReference thread : vm.allThreads()) {
// System.out.println("thread : " + thread);
//// thread.suspend();
// }
exceptionEvent((ExceptionEvent) event);
} else if (event instanceof VMDisconnectEvent) {
connected = false;
}
}
}
// } catch (VMDisconnectedException e) {
// Logger.getLogger(VMEventReader.class.getName()).log(Level.INFO,
// "VMEventReader quit on VM disconnect");
} catch (Exception e) {
System.err.println("crashed in event thread due to " + e.getMessage());
// Logger.getLogger(VMEventReader.class.getName()).log(Level.SEVERE,
// "VMEventReader quit", e);
e.printStackTrace();
}
}
};
eventThread.start();
errThread = new MessageSiphon(process.getErrorStream(), this).getThread();
outThread = new StreamRedirectThread("JVM stdout Reader", process.getInputStream(), System.out);
errThread.start();
outThread.start();
// Shutdown begins when event thread terminates
try {
if (eventThread != null) eventThread.join(); // is this the problem?
// System.out.println("in here");
// Bug #852 tracked to this next line in the code.
// http://dev.processing.org/bugs/show_bug.cgi?id=852
errThread.join(); // Make sure output is forwarded
// System.out.println("and then");
outThread.join(); // before we exit
// System.out.println("finished join for errThread and outThread");
// At this point, disable the run button.
// This happens when the sketch is exited by hitting ESC,
// or the user manually closes the sketch window.
// TODO this should be handled better, should it not?
if (editor != null) {
editor.deactivateRun();
}
} catch (InterruptedException exc) {
// we don't interrupt
}
// System.out.println("and leaving");
if (writer != null) writer.close();
}