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[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.6-297-g832f100


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The branch, master has been updated
       via  832f100d34c6e16222b5a380fbc87270c9cc488e (commit)
       via  a52d2ac00e1452cc3d2870f60523067ba766a791 (commit)
       via  8aa43b8d32dcd728a88250a9a53f803d37aaaab5 (commit)
       via  8e0a2563be208daf319d8eb720fc6236e211537d (commit)
       via  2a0e62a892c4d3f4bbab29fac9105ec98594a2d1 (commit)
       via  c252fca28cedf267799abdb2698abbb3e4f051ca (commit)
      from  3c5dc9341005e128957e5ea5d6aa199d4011c30c (commit)

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- Log -----------------------------------------------------------------
commit 832f100d34c6e16222b5a380fbc87270c9cc488e
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 16:55:59 2011 -0700

    tracepoints: Add support for CONDITION events
    
    These are events that check a condition before raising callbacks, but
    take no hit for the condition when not tracing.  We don't have to do
    anything special in stap except handle the new macro, as the condition
    is handled at the trace site.
    
    * tapsets.cxx (tracepoint_builder::get_tracequery_modules): Add a
      definition for DECLARE_TRACE_CONDITION.  Also settle the macro-
      arg wrappers to PARAMS().

commit a52d2ac00e1452cc3d2870f60523067ba766a791
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 15:04:13 2011 -0700

    tracepoints: Support reading enum parameters
    
    * tapsets.cxx (resolve_tracepoint_arg_type): Treat enum like any other
      numeric base type, simply casted to int64_t.
      (tracepoint_derived_probe::build_args): Log parameter availability.

commit 8aa43b8d32dcd728a88250a9a53f803d37aaaab5
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 14:15:27 2011 -0700

    tracepoints: Skip identical headers from the build and source trees
    
    In preparing the tracequery source, we normalize paths containing
    "include/" to just the suffix part, so the header will be found by the
    normal -I path.  However, the debuginfo source tree usually contains
    at least the same headers found in the build tree.  We were thus
    building effectively the same tracequery twice for headers that are
    present in both the build and source trees.  Stop that!
    
    * tapsets.cxx (tracepoint_builder::init_dw): Build the header list with
      knowledge of the "include/" normalization to avoid extra work.

commit 8e0a2563be208daf319d8eb720fc6236e211537d
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 13:42:04 2011 -0700

    tracepoints: Avoid building tracequery.ko targets
    
    Since we're now only using the tracequery.o intermediates, we can forgo
    building the tracequery.ko modules altogether.  This saves about a third
    of the processing time on my machine.
    
    * buildrun.cxx (make_any_make_cmd): New, the common make_cmd base.
      (make_make_cmd): The normal case targets "modules".
      (make_make_objs_cmd): New, build only stage-1 objects.
      (make_tracequeries): Call make_make_objs_cmd.

commit 2a0e62a892c4d3f4bbab29fac9105ec98594a2d1
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 13:21:34 2011 -0700

    tracepoints: Work with the tracequery's .o rather than .ko
    
    The intermediate object files are slightly smaller, since they don't
    have any of the module boilerplate compiled in yet.  It still has what
    we need though, just the basic stapprobe_* function definitions.
    
    * buildrun.cxx (make_tracequeries): Return .o filenames rather than .ko.
    * hash.cxx (find_tracequery_hash): Use .o for cached filenames.
    * tapsets.cxx (tracepoint_builder::get_tracequery_modules): Update
      comments and variable names to refer to objects instead of kos.

commit c252fca28cedf267799abdb2698abbb3e4f051ca
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 11 13:13:40 2011 -0700

    tracepoints: Cache an empty file for failures
    
    When a tracepoint header doesn't compile for any reason, we'd like not
    to keep trying on subsequent runs.  This patch restores previous
    behavior that would save an empty file in the cache, signaling that
    we've tried this header before and can't get anything from it.
    
    * tapsets.cxx (tracepoint_builder::get_tracequery_modules): When reading
      from the cache, note and skip empty files.  When saving to the cache,
      copy /dev/null for those that failed to compile.

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

Summary of changes:
 buildrun.cxx |   37 +++++++++++++++++++++++++-------
 hash.cxx     |    2 +-
 tapsets.cxx  |   66 ++++++++++++++++++++++++++++++++++++++++-----------------
 3 files changed, 76 insertions(+), 29 deletions(-)


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