[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.7-196-g920ef55

[SCM] systemtap: system-wide probe/trace tool branch, master, updated. release-1.7-196-g920ef55

[dsmith]

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- Log -----------------------------------------------------------------
commit 920ef55d853b34d8f2fbe381e6cc8c1487bd3f20
Author: David Smith <dsmith@redhat.com>
Date:   Thu May 3 14:20:34 2012 -0500

    Improved task_finder2 mmap tracking and better task_work cleanup.
    
    * runtime/task_finder2.c (__stp_tf_alloc_task_work): New function.
      (__stp_tf_free_task_work): Ditto.
      (__stp_tf_cancel_task_work): Ditto.
      (__stp_tf_quiesce_worker): Renamed from __stp_task_worker(). Uses
      __stp_tf_free_task_work() to free the task_work structure.
      (__stp_utrace_task_finder_target_quiesce): Uses
      __stp_tf_alloc_task_work() to allocate a task_work structure.
      (__stp_tf_mmap_worker): New task_work worker function.
      (__stp_utrace_task_finder_target_syscall_exit): If we're in an atomic
      context, use task_work_add() to call __stp_tf_mmap_worker().
      (stap_stop_task_finder): Call __stp_tf_cancel_task_work() to cancel all
      outstanding task work requests.

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

Summary of changes:
 runtime/task_finder2.c |  251 ++++++++++++++++++++++++++++++++++++++----------
 1 files changed, 202 insertions(+), 49 deletions(-)


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systemtap: system-wide probe/trace tool