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GNU GDB's Pedro Alves:

> One thing [I asked
> myself](http://lists.gnu.org/archive/html/bug-hurd/2008-10/msg00045.html)
> was, if gnu-nat.c couldn't be using the port's id as thread ids instead of a
> locally auto-generated number.  Maybe the thread id of the main thread would
> be preserved across execs this way


Also see [[thread numbering of ps and GDB]].

---

`attach` to a multi-threaded process.  See threads 1 to 5.  `detach`.  `attach`
again -- thread numbers continue where they stopped last time: now they're
threads 6 to 10.