Re: Question about inter-thread stack references

On Thu, 15 Jan 2015 23:54:57 -0800, Ivan Godard <ivan@ootbcomp.com>
wrote:


>If a process has two or more threads running in it, what are the rules
>regarding one thread referencing memory in a different thread's stack?
> ...


>Is anyone aware of language/thread package/hardware rules about required
>semantics for such usage? Is it explicitly permitted, explicitly banned,
>stated to be implementation defined, stated to be undefined, or simply
>not mentioned?


This sounds a bit like what was once known as Burroughs Large Systems
(then Unisys A-Series and now Clearpath or something) architecture. It
had processes, not threads, but processes can be related and can share
data. Every process has a stack, one stack can have a reference into
another stack, and unfortunately, that's about all I can remember at
the moment.


There are architecture reference manuals out there. The data
reference I'm thinking of is called a Stuffed Indirect Reference Word,
which might give you some idea of what you're getting into.


Louis

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