[Bug translator/4146] New: relax begin/end probe atomicity

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

This would have several parts:

- ensuring that begin/end probes get sorted before/after all other probe groups
for registration/unregistration purposes.  This is to preclude reentrancy.
- removing the interrupt-disabling boilerplate from begin/end probes.  This is
to permit interrupts during long-running report-generation routines.
- enlarging (but not to infinity!!) the MAXACTIVE quantity for begin/end probes.
 This is to permit large reports.
- turning the MAXACTIVE enforcement logic around, to store within the context
not an upward-counting actioncount, but a downward-counting
action-remaining-count.  This would be initialized to MAXACTIVE for normal
probes, but to some larger quantity for begin/end probes.  (Moots bug #1884.) 
Make sure that counter is *signed*, just incase we underflow it by one or two.

-- 
           Summary: relax begin/end probe atomicity
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=4146

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