[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.0-25-g55e50c2

[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.0-25-g55e50c2

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- Log -----------------------------------------------------------------
commit 55e50c24c9176f1b3d15af94e145456a68e7ecf6
Author: Josh Stone <jistone@redhat.com>
Date:   Mon Sep 28 17:36:04 2009 -0700

    Try to build tracequery for all headers at once
    
    To mitigate PR10424, we switched to building a separate tracequery
    module for each tracepoint header, so a bad header wouldn't break all of
    the others.  However, with recent kernels that leads to ~18 make
    commands, which adds up quickly in time.  It's cached, so that's not too
    bad, but as a developer who rebuilds stap frequently, it gets annoying.
    
    If we're going to call 18 makes, it's worth it to start with one bigger
    make that covers all the headers at once (like we used to).  If that one
    fails, we can still fall back to compiling individually.
    
    FWIW, the failing ext4.h header was only created in 2.6.31, and was
    fixed before 2.6.32, so the specific failure in PR10424 has a fairly
    small window.
    
    * buildrun.cxx (make_tracequery): Just take a single vector of headers.
    * hash.cxx (find_tracequery_hash): Deal with multiple headers.
    * tapsets.cxx (tracepoint_builder::get_tracequery_module): Ditto.
      (tracepoint_builder::init_dw): Attempt all system headers together,
      and if that fails, try again individually.

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

Summary of changes:
 buildrun.cxx |   13 ++++---------
 buildrun.h   |    3 +--
 hash.cxx     |    7 ++++---
 hash.h       |    4 +++-
 tapsets.cxx  |   58 +++++++++++++++++++++++++++++++++++++++++++---------------
 5 files changed, 55 insertions(+), 30 deletions(-)


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systemtap: system-wide probe/trace tool