[Bug translator/6445] New: extend utrace probes with target-process syntax

[Bug translator/6445] New: extend utrace probes with target-process syntax

[fche at redhat dot com]

We now have some process(PID).* and process("NAME").* probes.  This could be
extended to join the existing "stap -c CMD" / "stap -x PID" process targeting
facility:

* extend the task-finder logic to restrict its scanning of tasks to the
  staprun-given target-pid (and its descendants) only
* permit process.* utrace probes (i.e., not parametrized with "NAME" or PID,
  implicitly referring to the target-pid (and its descendants)

The "and its descendants" qualifier may need to be an option rather than
be hard-coded.

-- 
           Summary: extend utrace probes with target-process syntax
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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[Bug translator/6445] extend utrace probes with target-process syntax

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-04-30 21:12 -------
*** Bug 5898 has been marked as a duplicate of this bug. ***

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           What    |Removed                     |Added
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                 CC|                            |jkenisto at us dot ibm dot
                   |                            |com


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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[Bug translator/6445] extend utrace probes with wildcard and target-process syntax

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-07-19 18:23 -------
In addition,

  probe process("*").{begin,syscall,...} 

should constitute utrace-based probes on all processes systemwide.


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           What    |Removed                     |Added
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                 CC|                            |drepper at redhat dot com
            Summary|extend utrace probes with   |extend utrace probes with
                   |target-process syntax       |wildcard and target-process
                   |                            |syntax


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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[Bug translator/6445] extend utrace probes with "system-wide" and target-process syntax

[fche at redhat dot com]

------- Additional Comments From fche at redhat dot com  2008-07-30 15:20 -------
For purposes of this, it would be sufficient to have two
extensions:

- process("*") syntax
  that maps to the task_finder's unrestricted pathname/pid

- target-process syntax
  that maps to another task_finder option that restricts its
  monitoring to the target() (stap -c/-x) hierarchy

Maybe these two could be the same -- i.e., if someone runs "stap -c/-x",
then process("*").foo (or simpler, process.foo) probes would automagically
be restricted to the target process hierarchy.

Finally, bug #6456 could be a followup to support finer-grained
wildcards as in process("/bin/*").


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|extend utrace probes with   |extend utrace probes with
                   |wildcard and target-process |"system-wide" and target-
                   |syntax                      |process syntax


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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[Bug translator/6445] extend utrace probes with "system-wide" and target-process syntax

[dsmith at redhat dot com]

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           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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[Bug translator/6445] extend utrace probes with "system-wide" and target-process syntax

[dsmith at redhat dot com]

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
         AssignedTo|systemtap at sources dot    |dsmith at redhat dot com
                   |redhat dot com              |


http://sourceware.org/bugzilla/show_bug.cgi?id=6445

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