Messages in this thread | | | Date | Wed, 4 Jul 2018 02:16:52 -0700 | From | Srikar Dronamraju <> | Subject | Re: [PATCH v5 06/10] Uprobes: Support SDT markers having reference count (semaphore) |
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> > I'm not sure if I get your concerns but let me try to explain what happens > in such cases. please let me know if I misunderstood your point. > > 1. Install a probe using perf. > # ./perf probe sdt_tick:loop2 > > > > Does this explain your concerns? >
No, this was not my concern. My concern is with two users on the same USDT. 1. First user enables the probe point but doesn't increment the ref_cnt. via uprobe_register
2. Second user tries to enable the probe point and also increments the ref_cnt via uprobe_register_refctr.
3. If the second user now removes the probe point via uprobe_unregister.
4. What is the state of the ref_cnt?
-- Thanks and Regards Srikar
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