[Bug runtime/4917] New: permit on-the-fly program/module symbol data transfer

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

The fix for bug #4916 makes it harder to enable the system to support
dynamically updated module/symbol data.

The scenarios involve probes on libraries or modules that are not yet loaded,
and thus whose addresses cannot be sent to the module at initialization time.
If there was a secure channel available to staprun (and if staprun stayed
running, even if stapio was suspended), then staprun could inform the module
that there was more probe target code coming online.

Another scenario is probing a user program, but having the module anticipate
needing a backtrace for everything - including some libraries not yet loaded.
That library address data would have to be transmitted to the probe well
after initialization.

-- 
           Summary: permit on-the-fly program/module symbol data transfer
           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=4917

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