[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.1-137-gd105f66

[jistone at sourceware dot org]

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- Log -----------------------------------------------------------------
commit d105f6642677bd9ef1b20d1ba180ba0163cb0fa6
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Mar 2 15:57:58 2010 -0800

    PR11246 cont'd: Add options for cache control
    
    --disable-cache : turn off all caching
    --clean-cache   : clean up stale entries and then quit
    --poison-cache  : force regeneration of items that would have hit the cache
    
    These are undocumented for now, until we decide whether they are
    generally useful.
    
    * main.cxx (main): Parse the new options.
    * session.h (systemtap_session): Add poison_cache; document the others.
    * clean.cxx (clean_cache): No longer static.
      (get_stapconf_from_cache, get_script_from_cache): Respect poison.
    * tapsets.cxx (tracepoint_builder::get_tracequery_module): Ditto.
      (dwarf_cast_expanding_visitor::filter_special_modules): Ditto.

commit 9b3c54b2fc836e20a0a7895aa759938e62eaacf9
Author: Josh Stone <jistone@redhat.com>
Date:   Mon Mar 1 18:42:18 2010 -0800

    PR11246 cont'd: Separate script/stapconf caching
    
    I'm separating the caching and creation logic for stapconf, so it can be
    conditionalized on s.use_cache instead of s.use_script_cache.
    
    * session.h (systemtap_session): Store base_hash for better reuse.
    * hash.cxx (get_base_hash): Get the base from the session, or build it.
      (find_hash): Split into separate script/stapconf versions.
    * cache.cxx (add_to_cache, get_from_cache): Ditto.
    * main.cxx (main): Adapt caller, and delay stapconf until pass-4.

commit 6b067d7d20c10acb68d768003bf8031f155e5f39
Author: Josh Stone <jistone@redhat.com>
Date:   Mon Mar 1 17:48:54 2010 -0800

    Move pass-3/4 cache checks after the reported pass-2 end
    
    * main.cxx (main): Reorganize the end of pass-2 a bit.

commit 63d530ab4dacb908c7262be59098ef026e186a30
Author: Josh Stone <jistone@redhat.com>
Date:   Mon Mar 1 17:27:53 2010 -0800

    PR11246: Add more granular cache control
    
    There are some module options that require us to disable caching for the
    script, but before now this had a global effect.  There are some cache
    objects, like tracepoint and @cast query modules, which we would like to
    cache even when the script itself needs to be uncached.
    
    * session.h (systemtap_session): New use_script_cache flag.
    * main.cxx (main): -m & -k can just disable the script cache.  Failure to
      create the cache directories still disables all caching.
    * hash.cxx (create_hashdir): Failure disables all caching.
    * cache.cxx (add_to_cache): Failure only toggles the script caching. If
      the stapconf fails though, we don't need to block the .ko reuse.

-----------------------------------------------------------------------

Summary of changes:
 cache.cxx     |   65 ++++++++++++++++++++++++++++++++++----------------
 cache.h       |    9 +++++-
 elaborate.cxx |    1 +
 hash.cxx      |   42 +++++++++++++++------------------
 hash.h        |    3 +-
 main.cxx      |   73 ++++++++++++++++++++++++++++++++++++++++++++------------
 session.h     |   12 ++++++---
 tapsets.cxx   |    4 +-
 8 files changed, 140 insertions(+), 69 deletions(-)


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systemtap: system-wide probe/trace tool