Shared memory and IPC

Wez Furlong wez at
Fri Sep 7 02:10:02 GMT 2001

On 06/09/01, "Peter Samuelson" <peter at> wrote:
> [Wez Furlong]
> > And how do you tell if a range is mapped in your address space?
> Hmmm, you could trap SIGSEGV and SIGBUS and then read from the address.
> [evil grin]
> Or, try to mmap without MAP_FIXED and tell the peer process to try that
> address ... repeat if fail ... and of course unmap the unused mappings
> later.
> On Linux you can open /proc/self/maps and parse that.  Not exactly the
> most portable solution, of course!

So there is no nice-n-easy syscall then?  Even a non-portable call would
be better than parsing /proc/self/maps.



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