Messages in this thread |  | | Subject | Re: [PATCH v8 3/6] Uprobes: Support SDT markers having reference count (semaphore) | From | Ravi Bangoria <> | Date | Mon, 13 Aug 2018 19:56:53 +0530 |
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On 08/13/2018 06:47 PM, Oleg Nesterov wrote: > On 08/13, Ravi Bangoria wrote: >> >>> But damn, process creation (exec) is trivial. We could add a new uprobe_exec() >>> hook and avoid delayed_uprobe_install() in uprobe_mmap(). >> >> I'm sorry. I didn't get this. > > Sorry for confusion... > > I meant, if only exec*( could race with _register(), we could add another uprobe > hook which updates all (delayed) counters before return to user-mode.
Ok.
> >>> Afaics, the really problematic case is dlopen() which can race with _register() >>> too, right? >> >> dlopen() should internally use mmap() right? So what is the problem here? Can >> you please elaborate. > > What I tried to say is that we can't avoid uprobe_mmap()->delayed_uprobe_install() > because dlopen() can race with _register() too, just like exec.
Right :)
Thanks, Ravi
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