| Summary: | Unhandeled state {frysk.proc.LinuxTask@4f64be0,pid=3048,tid=3048,state=detached} in state "detached" did not handle handleUnblock | ||
|---|---|---|---|
| Product: | frysk | Reporter: | Sami Wagiaalla <swagiaal> |
| Component: | general | Assignee: | Andrew Cagney <cagney> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | scox |
| Priority: | P1 | ||
| Version: | unspecified | ||
| Target Milestone: | --- | ||
| Host: | Target: | ||
| Build: | Last reconfirmed: | ||
| Bug Depends on: | |||
| Bug Blocks: | 1516 | ||
*** Bug 2650 has been marked as a duplicate of this bug. *** I set a fork observer on bash then execute:
find /home /lib /lib64 /bin /usr/bin /etc -name 'x*'
frysk.gui.monitor.observers.TaskForkedObserver.bottomHalf calls
frysk.proc.Task.requestUnblock for:
proc state=Detaching
task state=StartMainTask.wantToDetach
StartMainTask.handleStoppedEvent
->calls blockOrDetach
->calls sendDetach
->calls performTaskDetachCompleted
eventLoop.add
->calls handleUnblock
22-May-06 6:04:12 PM frysk.proc.TaskState$StartMainTask$5 handleStoppedEvent
{frysk.proc.LinuxTask@329e3395,pid=6682,tid=6682,state=StartMainTask.wantToDetach}
handleStoppedEvent
22-May-06 6:04:12 PM frysk.proc.LinuxTask sendDetach
{frysk.proc.LinuxTask@329e3395,pid=6682,tid=6682,state=StartMainTask.wantToDetach}
sendDetach
22-May-06 6:04:12 PM frysk.proc.Proc performTaskDetachCompleted
{frysk.proc.LinuxProc@31cac2d5,pid=6682,command=bash,state=Detaching}
performTaskDetachCompleted
22-May-06 6:04:12 PM frysk.proc.TaskState$10 handleUnblock
{frysk.proc.LinuxTask@31c4e42d,pid=3387,tid=3387,state=running} handleUnblock
22-May-06 6:04:12 PM frysk.proc.TaskState$1 handleUnblock
{frysk.proc.LinuxTask@329e3395,pid=6682,tid=6682,state=detached} handleUnblock
I think this might have been a GUI bug, fixed with: 2006-05-30 Andrew Cagney <cagney@redhat.com> * TaskObserver.java (Forked): Add method updateForkedOffspring. (Cloned): Add method updateClonedOffspring. * TestTaskObserverBlocked.java: Handle updateForkedOffspring, and updateClonedOffspring. * TestTaskObserverDetach.java: Ditto. * TestTaskForkedObserver.java: Handle updateForkedOffspring. * TestTaskClonedObserver.java: Handle updateClonedOffspring. * TaskState.java: Generate notifyForkedOffspring, and notifyClonedOffspring events. * Task.java (id, proc): Make final. (creator): New member. (Task): Initialize creator. (notifyClonedOffspring, notifyForkedOffspring): New. * ProcState.java ("detached" .handleAddTasksObserver): Add updateClonedOffspring to local class, block the offspring. Note the last change, where it blocks the offspring (before it could run free resulting in an attempt to unblock an unattached task). This lead to the related change: 2006-05-30 Andrew Cagney <cagney@redhat.com> * observers/TaskForkedObserver.java: Handle updateForkedOffspring. Always block both the parent and offspring (the bottomHalf always unblocks). * observers/TaskCloneObserver.java: Handle updateClonedOffspring. * EventLogger.java: Handle updateForkedOffspring, and updateClonedOffspring. in particular the updateForked* observers now always block (before the block was conditional on something). The lack of blocking could result in race conditions. |
Select a proc, add a FrokObserver, induce a fork and boom: Frysk Core has reported the following errors {frysk.proc.LinuxTask@4f64be0,pid=3048,tid=3048,state=detached} in state "detached" did not handle handleUnblock frysk.proc.State.unhandled (FryskGui) frysk.proc.TaskState.handleUnblock (FryskGui) frysk.proc.Task$2.execute (FryskGui) frysk.event.EventLoop.runEventLoop (FryskGui) frysk.event.EventLoop.run (FryskGui) frysk.gui.Gui$3.run (FryskGui) java.lang.Thread.run (libgcj.so.7)