July 2003 - Darwin-kernel - lists.apple.com

Non-existent PPID?
by Paul Ripke 01 Jul '03

01 Jul '03

Anyone see a problem here? stix-pbg3:ksh$ ps alx | egrep 'PID|3978' UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND 0 3979 3978 0 31 0 14108 336 - S ?? 0:00.02 VirtualPC_Services stix-pbg3:ksh$ uname -a Darwin stix-pbg3 6.6 Darwin Kernel Version 6.6: Fri Jun 27 00:36:43 EST 2003; stix:BUILD/obj/RELEASE_PPC Power Macintosh powerpc The parent was "killed" via the WindowServer/LoginServer machanism, not that that should matter. The only thing to note is that the program is suid root. Killing the process leaves it a zombie, and zombies always have a PPID of 0, as reported by ps(1). If I get a chance, I'll see if I can come up with a simpler test case. Cheers, -- Paul Ripke Unix/OpenVMS/TSM/DBA 101 reasons why you can't find your Sysadmin: 68: It's 9AM. He/She is not working that late. -- Koos van den Hout _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Analysis of Darwin kernel design
by Joseph Gabriel Echeverria 01 Jul '03

01 Jul '03

You may consider looking into a program called Simics. It is a machine simulator that lets you run a variety of platforms on a variety of hosts. Some the architectures they simulate are x86 and PPC. You could try to get Darwin to run on the x86 simulator. If you are a student of a university, you can get a free licence for a year. The program also supports debugging of system code and cycle accurate timing statistics. url: https://www.simics.net/ -Joey On Tue, 1 Jul 2003, Kim-Thomas Moeller wrote: > Hello, > > as part of my computer science studies I'm interested in the design of > the darwin kernel. Unfortunately, Darwin does not run stable on my x86 > machines (probably due to mainboard problems), and I can't afford buying > an apple machine. So I'm searching for two tools, ideally running under > Linux: > > Is the source of the Darwin MIG interface generator publicly available? > In what extent does it differ from GNU MIG? > > Do you know any source code analysis tools one could use to get a better > understandig of the kernel code? I've heard there is a tool integrated > in the ProjectBuilder (which I don't own), but perhaps there are others, > preferrably free or at low cost. > > > Thanks, > Kim > > -- > Kim-Thomas Moeller * kim(a)kim-com.de > _______________________________________________ > darwin-kernel mailing list | darwin-kernel(a)lists.apple.com > Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel > Do not post admin requests to the list. They will be ignored. _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Analysis of Darwin kernel design
by Kim-Thomas Moeller 01 Jul '03

01 Jul '03

Hello, as part of my computer science studies I'm interested in the design of the darwin kernel. Unfortunately, Darwin does not run stable on my x86 machines (probably due to mainboard problems), and I can't afford buying an apple machine. So I'm searching for two tools, ideally running under Linux: Is the source of the Darwin MIG interface generator publicly available? In what extent does it differ from GNU MIG? Do you know any source code analysis tools one could use to get a better understandig of the kernel code? I've heard there is a tool integrated in the ProjectBuilder (which I don't own), but perhaps there are others, preferrably free or at low cost. Thanks, Kim -- Kim-Thomas Moeller * kim(a)kim-com.de _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Re: Asynchronous I/O in Panther
by Justin C. Walker 01 Jul '03

01 Jul '03

On Monday, June 30, 2003, at 05:42 PM, Sam Vaughan wrote: Hi everyone, The Panther Server document at <http://www.apple.com/server/macosx/pantherserver.html> says: "For improved file and networking system performance Panther Server now supports asynchronous I/O" Asynchronous I/O has been working just fine for a long time now. So just what are they getting at here? It's possible (I haven't checked yet) that the kernel for Mac OS X 10.3 now supports the "asynch I/O" APIs (aio) from (Free)BSD. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | If you're not confused, | You're not paying attention *--------------------------------------*-------------------------------* _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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Asynchronous I/O in Panther
by Sam Vaughan 01 Jul '03

01 Jul '03

Hi everyone, The Panther Server document at <http://www.apple.com/server/macosx/pantherserver.html> says: "For improved file and networking system performance Panther Server now supports asynchronous I/O" Asynchronous I/O has been working just fine for a long time now. So just what are they getting at here? Sam _______________________________________________ darwin-kernel mailing list | darwin-kernel(a)lists.apple.com Help/Unsubscribe/Archives: http://www.lists.apple.com/mailman/listinfo/darwin-kernel Do not post admin requests to the list. They will be ignored.

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