Re: Process-wide watchpoints

[Peter Zijlstra]

On Thu, Feb 04, 2021 at 02:35:36PM +0100, Dmitry Vyukov wrote:

> I meant that we could restrict synchronous SIGTRAP for (1)
> perf_event_open(pid != 0) and (2) disable it after exec.

Hmm, I think I finally get what you're after. And yes, multi-process or
fork() based thingies are common and might well work too.

disable_on_exec isn't quite right though, it needs to be something that
kills the events entirely. I'll think about it.