[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.0-142-gd117a23

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commit d117a23e6883640be751523274811d9d5e9dcc11
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 27 13:52:34 2009 -0700

    PR10854 cont'd: Add a testcase for the reproducer

commit a1995fef7f86ee6d1c3860cfb7e2652d986e4aa9
Author: Josh Stone <jistone@redhat.com>
Date:   Tue Oct 27 12:15:29 2009 -0700

    PR10854: Use a mutex around transport startup/shutdown
    
    We had a race where the probe setup could be called during/after the
    probe shutdown in abnormal circumstances, which leads to kernel
    callbacks still registered after module unload.  (BOOM)
    
    Now the setup/shutdown activities and related flags are guarded by a
    mutex, so we should have strict ordering.
    
    * runtime/transport/transport.c (_stp_transport_mutex): New.
      (_stp_handle_start): Grab the mutex, and make sure we're not exiting.
      (_stp_cleanup_and_exit): Grab the mutex.
      (_stp_lock_inode, _stp_unlock_inode): Use kernel version for checking
      inode locking type.

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

Summary of changes:
 runtime/transport/transport.c        |   38 ++++++++++++++++++++-------------
 testsuite/systemtap.base/pr10854.exp |   31 +++++++++++++++++++++++++++
 testsuite/systemtap.base/pr10854.stp |   20 +++++++++++++++++
 3 files changed, 74 insertions(+), 15 deletions(-)
 create mode 100644 testsuite/systemtap.base/pr10854.exp
 create mode 100644 testsuite/systemtap.base/pr10854.stp


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