frysk.proc.live
Class LinuxPtraceProcState

java.lang.Object
  frysk.proc.live.State
      frysk.proc.live.LinuxPtraceProcState

Direct Known Subclasses:

LinuxPtraceProcState.Attaching.ToMainTask, LinuxPtraceProcState.Attaching.ToOtherTasks, LinuxPtraceProcState.Detaching

abstract class LinuxPtraceProcState
extends State

A UNIX Process State

Nested Class Summary

private static class	LinuxPtraceProcState.Attaching A process is being attached, this is broken down into sub-states.
private static class	LinuxPtraceProcState.Detaching In the process of detaching; waiting for all tasks to report back that they have successfully detached.

Field Summary

private static LinuxPtraceProcState	destroyed The process has been destroyed.
private static LinuxPtraceProcState	detached The process is running free (or at least was the last time its status was checked).
private static Log	fine
private static Log	finest
private static LinuxPtraceProcState	running The process is running, add and remove observers.

Constructor Summary

LinuxPtraceProcState(String state)

Method Summary

(package private) LinuxPtraceProcState	handleAddObservation(LinuxPtraceProc proc, Observation observation)
(package private) LinuxPtraceProcState	handleDeleteObservation(LinuxPtraceProc proc, Observation observation)
(package private) LinuxPtraceProcState	handleDetach(LinuxPtraceProc proc, boolean shouldRemoveObservers)
(package private) LinuxPtraceProcState	handleRemoval(LinuxPtraceProc proc)
(package private) LinuxPtraceProcState	handleTaskAttachCompleted(LinuxPtraceProc proc, LinuxPtraceTask task)
(package private) LinuxPtraceProcState	handleTaskDetachCompleted(LinuxPtraceProc proc, LinuxPtraceTask task)
(package private) LinuxPtraceProcState	handleTaskDetachCompleted(LinuxPtraceProc proc, LinuxPtraceTask task, LinuxPtraceTask clone)
(package private) static LinuxPtraceProcState	initial(boolean starting) Return the Proc's initial state.

Methods inherited from class frysk.proc.live.State

toString, unhandled, unhandled

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

fine

private static final Log fine

finest

private static final Log finest

detached

private static final LinuxPtraceProcState detached

The process is running free (or at least was the last time its status was checked).

destroyed

private static final LinuxPtraceProcState destroyed

The process has been destroyed.

running

private static final LinuxPtraceProcState running

The process is running, add and remove observers. If the number of observers ever reaches zero, start detaching.

Constructor Detail

LinuxPtraceProcState

LinuxPtraceProcState(String state)

Method Detail

handleRemoval

LinuxPtraceProcState handleRemoval(LinuxPtraceProc proc)

handleTaskAttachCompleted

LinuxPtraceProcState handleTaskAttachCompleted(LinuxPtraceProc proc,
                                               LinuxPtraceTask task)

handleTaskDetachCompleted

LinuxPtraceProcState handleTaskDetachCompleted(LinuxPtraceProc proc,
                                               LinuxPtraceTask task)

handleTaskDetachCompleted

LinuxPtraceProcState handleTaskDetachCompleted(LinuxPtraceProc proc,
                                               LinuxPtraceTask task,
                                               LinuxPtraceTask clone)

handleAddObservation

LinuxPtraceProcState handleAddObservation(LinuxPtraceProc proc,
                                          Observation observation)

handleDeleteObservation

LinuxPtraceProcState handleDeleteObservation(LinuxPtraceProc proc,
                                             Observation observation)

handleDetach

LinuxPtraceProcState handleDetach(LinuxPtraceProc proc,
                                  boolean shouldRemoveObservers)

initial

static LinuxPtraceProcState initial(boolean starting)

Return the Proc's initial state. A new detached process materializes out of no where by magically appearing in /proc; a new attached process is always created via fork. The latter, until an observer is added is assumed to be about to detach.