[RFA 4/4] Improved linker-debugger interface

[Gary Benson <gbenson at redhat dot com>]

Hi all,

This patch builds on the probes-based runtime linker interface,
adding incremental library list loading.  The list of currently
loaded libraries is cached in the program space, and updated as
necessary whenever a solib event breakpoint is hit.  I've tried
to make it fail as gracefully as possible for maximum forward
compatibility: if something happens that it does not understand
then the cache will be wiped and not repopulated until an event
occurs that it does understand.  Until such time GDB will use
its previous behaviour of walking the entire link map each time
a solib event occurs.

I have of course tested this locally, but I don't have a real
world example of an application using thousands of shared
libraries, so I'd really appreciate feedback from those of you
that do.

Cheers,
Gary

-- 
http://gbenson.net/

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