frysk.proc.live
Class LinuxPtraceTaskState.Stepping

java.lang.Object
  frysk.proc.live.State
      frysk.proc.live.LinuxPtraceTaskState
          frysk.proc.live.LinuxPtraceTaskState.Running
              frysk.proc.live.LinuxPtraceTaskState.Stepping

Enclosing class:

LinuxPtraceTaskState

private static final class LinuxPtraceTaskState.Stepping
extends LinuxPtraceTaskState.Running

Nested Class Summary

Nested classes/interfaces inherited from class frysk.proc.live.LinuxPtraceTaskState

LinuxPtraceTaskState.StartClonedTask

Field Summary

Fields inherited from class frysk.proc.live.LinuxPtraceTaskState

detaching, inSyscallRunning, running, stepping

Constructor Summary

LinuxPtraceTaskState.Stepping()
Singleton indicating a stepping Running state (not inside a syscall).

Method Summary

private void	checkBreakpointStepping(LinuxPtraceTask task)
(package private) LinuxPtraceTaskState	handleSignaledEvent(LinuxPtraceTask task, Signal sig)
(package private) LinuxPtraceTaskState	handleStoppedEvent(LinuxPtraceTask task, Signal signal)
(package private) LinuxPtraceTaskState	handleTrappedEvent(LinuxPtraceTask task) Handles traps caused by breakpoints or instruction stepping.

Methods inherited from class frysk.proc.live.LinuxPtraceTaskState.Running

blockedContinue, checkWatchpoint, handleAddObservation, handleClonedEvent, handleContinue, handleDeleteObservation, handleDetach, handleExecedEvent, handleForkedEvent, handleSyscalledEvent, handleTerminatedEvent, handleTerminatingEvent, handleUnblock, sendContinue

Methods inherited from class frysk.proc.live.LinuxPtraceTaskState

clonedState, detachedState, handleAttach, handleRemoval, mainState

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

Constructor Detail

LinuxPtraceTaskState.Stepping

LinuxPtraceTaskState.Stepping()

Singleton indicating a stepping Running state (not inside a syscall).

Method Detail

handleTrappedEvent

LinuxPtraceTaskState handleTrappedEvent(LinuxPtraceTask task)

Handles traps caused by breakpoints or instruction stepping. If there are any Code observers at the address of the trap they get notified. If none of the Code observers blocks we continue over the breakpoint (breakpoint stepping state), otherwise we block till all blocking observers are happy (breakpoint stopped state). If there are no Code observers installed at the address, but we are stepping then all instruction observers are notified. Otherwise it is a real trap event and we pass it on to the task itself.

Overrides:

handleTrappedEvent in class LinuxPtraceTaskState.Running

checkBreakpointStepping

private void checkBreakpointStepping(LinuxPtraceTask task)

handleSignaledEvent

LinuxPtraceTaskState handleSignaledEvent(LinuxPtraceTask task,
                                         Signal sig)

Overrides:

handleSignaledEvent in class LinuxPtraceTaskState.Running

handleStoppedEvent

LinuxPtraceTaskState handleStoppedEvent(LinuxPtraceTask task,
                                        Signal signal)

Overrides:

handleStoppedEvent in class LinuxPtraceTaskState.Running