Re: LSB-si status from Mats

On Fri, Aug 02, 2002 at 02:29:25PM -0700, Wichmann, Mats D wrote:
> LSB-si/ia32:  with Anthony Towns' fix to mprotect,
> the hang is gone. 
> Total failures:  1 
> 
> T.msync 7 claims that the sequence: mmap 1 page, 
> msync 2 pages at address returned by mmap does not
> fail when it should.

LSB.os/mfiles/msync_P/T.msync_P in full, presumably

> This is one that behaves
> as the test expects on the same system running
> natively, and could be either a library change
> (which I can't spot) or another test-interaction
> problem like the mprotect test was (I can't spot
> that, either).

I get the same thing, running natively on a minimal Debian system. It
doesn't seem to be a test interaction problem: just run ./T.msync_P
7 alone fails in the same way. At a guess, it's probably that libc's
mapping something in the area just after our mmap, and we're accidently
msync'ing that as well as our stuff.

Perhaps a better test strategy would be to do something like:

	char *x = malloc(vsrt_pgsz);
	char *y = mmap(...);
	char *addr = min(x,y);
	size_t size = max(x,y) - start + vsrt_pgsz;