[RFA 5/4 take 2] Improved linker-debugger interface

[Gary Benson <gbenson at redhat dot com>]

Hi all,

I did some profiling and realised that the probes patch I just mailed
had reintroduced calls to update_section_map, a slow function I did
some work to avoid calling last year:

  http://www.cygwin.com/ml/gdb-patches/2011-07/msg00460.html
  http://www.cygwin.com/ml/gdb-patches/2011-10/msg00361.html

Attached is a patch to avoid calling update_section_map from the
probes interface.  Updated timings are as follows:

  no of solibs    100     250     500     1000    2000    5000
  ------------------------------------------------------------
  old interface     1       3       9       35     141     942
  new interface     0       0       1        4      14      89
  (times in seconds)

So, with this patch GDB is not three but ten times faster.

Thanks,
Gary

-- 
http://gbenson.net/

Attachment: rtld-stap-7.patch
Description: Text document