site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com On 30/08/2008, at 5:56 PM, Jordan K. Hubbard wrote: Yes please :) Interesting. Here is svn 1.4… And 1.5… -- LD. _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.appl... (some nice hooks in Libsystem, for example, right below the point where all the API variants converge so you don't have do all that crazy entrypoint gymnastics... Hurm... Mumble... Moving on...). What happens with svn (say `svn log http://blah.com`), is that it calls select() with a single fd in the writefds set (presumably the fd that the network request is going out on) and a timeout of 3600. With svn < 1.5 with this implementation injected everything works fine. With svn 1.5, the syscall() returns immediately with -1 and the error is 'Bad file descriptor'. Well, one obvious question, I suppose, is what happens when you trace both svn 1.4 and svn 1.5 and then compare the results? It's easy enough to do stuff like this with drace, to wit: svn: select(nfds=4, readfds=bfffe918, writefds=0, errorfds=0, timeout=bfffe998) svn: select(nfds=4, readfds=bfffe988, writefds=0, errorfds=0, timeout=bfffea08) svn: select(nfds=4, readfds=bfffe918, writefds=0, errorfds=0, timeout=bfffe998) svn: select(nfds=4, readfds=bfffe928, writefds=0, errorfds=0, timeout=bfffe9a8) svn: select(nfds=4, readfds=bfffe928, writefds=0, errorfds=0, timeout=bfffe9a8) svn: select(nfds=4, readfds=bfffe988, writefds=0, errorfds=0, timeout=bfffea08) svn: select(nfds=4, readfds=bfffea88, writefds=0, errorfds=0, timeout=bfffeb08) svn: select(nfds=4, readfds=bfffea98, writefds=0, errorfds=0, timeout=bfffeb18) svn: select(nfds=4, readfds=bfffe9e8, writefds=0, errorfds=0, timeout=bfffea68) svn: select(nfds=4, readfds=bfffe9f8, writefds=0, errorfds=0, timeout=bfffea78) svn: select(nfds=4, readfds=bfffea58, writefds=0, errorfds=0, timeout=bfffead8) svn: select(nfds=4, readfds=bfffeaf8, writefds=0, errorfds=0, timeout=bfffeb78) svn: select(nfds=4, readfds=bfffea48, writefds=0, errorfds=0, timeout=bfffeac8) svn: select(nfds=4, readfds=bfffeab8, writefds=0, errorfds=0, timeout=bfffeb38) svn: select(nfds=4, readfds=bfffec78, writefds=0, errorfds=0, timeout=bfffecf8) svn: select(nfds=4, readfds=bfffef48, writefds=0, errorfds=0, timeout=bfffefc8) svn: select(nfds=4, readfds=7fff5fbfe580, writefds=7fff5fbfe500, errorfds=0, timeout=7fff5fbfe4f0) svn: select(nfds=4, readfds=7fff5fbfe660, writefds=7fff5fbfe5e0, errorfds=0, timeout=7fff5fbfe5d0) svn: select(nfds=4, readfds=7fff5fbfe260, writefds=7fff5fbfe1e0, errorfds=0, timeout=7fff5fbfe1d0) svn: select(nfds=4, readfds=7fff5fbfe2f0, writefds=7fff5fbfe270, errorfds=0, timeout=7fff5fbfe260) svn: select(nfds=4, readfds=7fff5fbfe380, writefds=7fff5fbfe300, errorfds=0, timeout=7fff5fbfe2f0) svn: select(nfds=4, readfds=7fff5fbfe4e0, writefds=7fff5fbfe460, errorfds=0, timeout=7fff5fbfe450) svn: select(nfds=4, readfds=7fff5fbfe4c0, writefds=7fff5fbfe440, errorfds=0, timeout=7fff5fbfe430) svn: select(nfds=4, readfds=7fff5fbfe3c0, writefds=7fff5fbfe340, errorfds=0, timeout=7fff5fbfe330) svn: select(nfds=4, readfds=7fff5fbfe450, writefds=7fff5fbfe3d0, errorfds=0, timeout=7fff5fbfe3c0) svn: select(nfds=4, readfds=7fff5fbfe550, writefds=7fff5fbfe4d0, errorfds=0, timeout=7fff5fbfe4c0) svn: select(nfds=5, readfds=7fff5fbfe740, writefds=7fff5fbfe6c0, errorfds=0, timeout=7fff5fbfe6b0) svn: select(nfds=6, readfds=7fff5fbfe580, writefds=7fff5fbfe500, errorfds=0, timeout=7fff5fbfe4f0) svn: select(nfds=4, readfds=7fff5fbfe5e0, writefds=7fff5fbfe560, errorfds=0, timeout=7fff5fbfe550) svn: select(nfds=5, readfds=7fff5fbfe660, writefds=7fff5fbfe5e0, errorfds=0, timeout=7fff5fbfe5d0) svn: select(nfds=6, readfds=7fff5fbfe660, writefds=7fff5fbfe5e0, errorfds=0, timeout=7fff5fbfe5d0) svn: select(nfds=6, readfds=7fff5fbfe450, writefds=7fff5fbfe3d0, errorfds=0, timeout=7fff5fbfe3c0) svn: select(nfds=6, readfds=7fff5fbfe260, writefds=7fff5fbfe1e0, errorfds=0, timeout=7fff5fbfe1d0) svn: select(nfds=6, readfds=7fff5fbfe2f0, writefds=7fff5fbfe270, errorfds=0, timeout=7fff5fbfe260) svn: select(nfds=6, readfds=7fff5fbfe380, writefds=7fff5fbfe300, errorfds=0, timeout=7fff5fbfe2f0) svn: select(nfds=6, readfds=7fff5fbfe3c0, writefds=7fff5fbfe340, errorfds=0, timeout=7fff5fbfe330) svn: select(nfds=6, readfds=7fff5fbfe4e0, writefds=7fff5fbfe460, errorfds=0, timeout=7fff5fbfe450) svn: select(nfds=6, readfds=7fff5fbfe3d0, writefds=7fff5fbfe350, errorfds=0, timeout=7fff5fbfe340) svn: select(nfds=6, readfds=7fff5fbfe4f0, writefds=7fff5fbfe470, errorfds=0, timeout=7fff5fbfe460) svn: select(nfds=6, readfds=7fff5fbfe800, writefds=7fff5fbfe780, errorfds=0, timeout=7fff5fbfe770) svn: select(nfds=6, readfds=7fff5fbfe840, writefds=7fff5fbfe7c0, errorfds=0, timeout=7fff5fbfe7b0) Tried several times and got the same behaviour all times. The command was `svn log http://macromates.com/svn/Bundles --limit 1`, without my library injected. This unfortunately doesn't ring any bells for me. What I don't understand is why the syscall to select in my code, using the exact params that were passed to select untouched, fails. This email sent to site_archiver@lists.apple.com