Messages in this thread |  | | Date | Mon, 7 May 2001 19:03:22 +0000 | From | Pavel Machek <> | Subject | vsyscalls [was Re: X15 alpha release: as fast as TUX but in user space (fwd)] |
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Hi!
> > > PS: Hmm, how do you do timewarp for just one userland appliation with > > > this installed? > > > > 1. What on earth for? > > Y2K testing was one previous example. > > > 2. How do you do it today, and why wouldn't that work? > > LD_PRELOAD and providing its still using a lib call it would. I dont see the > original posters problem
LD_PRELOAD is not reliable: application may do syscall itself and find out true time. But ptrace works currently and *is* reliable.
Problem is that vsyscalls ay take ability to use ptrace to fool apps away. Pavel -- Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt, details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.
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