Messages in this thread |  | | Date | Mon, 13 Aug 2018 15:17:24 +0200 | From | Oleg Nesterov <> | Subject | Re: [PATCH v8 3/6] Uprobes: Support SDT markers having reference count (semaphore) |
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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.
> > 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.
Oleg.
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