[Bug runtime/6451] New: staprun shutdown deadlock

["fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

current git systemtap running against e.g. rhel5 and some other hosts
appears to sometimes deadlock during session shutdown.  According to a
vmcrash image captured of this event, staprun is attempting to run
delete_module(), but this can't get done because it is also holding an
open filehandle against the /sys/.../systemtap/.../.cmd control file.

In my runs, the systemtap.printf/end1.exp test case reliably produces
this lockup, but many other tests run fine up to that point.

It's as if set_clexec (FD_CLOEXEC) is not working; or perhaps an exec
was not even done.

-- 
           Summary: staprun shutdown deadlock
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: runtime
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6451

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