Re: [boost] Persistency library

Subject: Re: [boost] Persistency library
From: Oliver Kowalke (oliver.kowalke_at_[hidden])
Date: 2011-09-26 02:21:25

> > I assume resuming from a checkpoint would also require to restore the 
> > registers, flags, stack (pointer), instruction pointer etc. - I'd like 
> > to know if your lib supports only intel or some other architectures too.
> > 
> > Oliver
> 
> Your assumption is correct.
> However, the actual implementation is done via getcontext()/setcontext(),
> so it is not hard-wired to a specific hardware architecture.

You know that ucontext-stuff (getcontext()/setcontext()/swapcontext()/makecontext()) is deprecated by POSIX 2003 and removed by POSIX 2008?
For instance glibc doesn't implement those functionality on ARM.

I don't know your implementation but on x86_64 the makecontext() function of glibc can not handle pointers as arguments (var-args for makecontext()).
comment from makecontext.c (glibc-2.14): 'This implementation currently only handles integer arguments.'
If you want to pass a pointer to the context-function via makecontext() you get a truncated address.

Oliver
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