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

Is operator new safe?
by raldrich＠mac.com 22 Apr '03

22 Apr '03

Is it safe to use the c++ operator new in a kernel extension? I'm porting a file system library written in c++ to MacOS X, and I'm getting a kernel panic when it calls new after performing a series of I/Os, so I'm trying to determine whether the call to new is the problem, or if I trashed memory when performing my I/O. Thanks, Ron Aldrich Software Architects, Inc. _______________________________________________ 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: Getting xnu
by Garth Cummings 21 Apr '03

21 Apr '03

Hello to all who are reporting issues with cvs: Please read Quinn's forward from 4/17 titled "Darwin source for Mac OS X 10.2.5 is available." This explains recent changes to the source distribution. Thanks, --gc On Saturday, April 19, 2003, at 08:52 PM, Justin LaPre wrote: Sorry if this is the wrong place for this (I'm kind of a newbie...), but I'm having some problems accessing xnu through CVS. I'm registered through Apple, and I'm using :pserver:laprej@anoncvs.opensource.apple.com:/cvs/apsl as my CVSROOT environment variable. Once I log in, attempting to check out xnu gives the error: "cvs server: cannot find module `xnu' - ignored cvs [checkout aborted]: cannot expand modules" Any help? Thanks. -Justin _______________________________________________ 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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Re: How to get latest xnu and other source modules
by Jean-Edouard BABIN 21 Apr '03

21 Apr '03

You can mount http://www.opensource.apple.com/darwinsource/ with webdav on 20/04/03 20:59, + William Kucharski ; <kucharsk(a)mac.com> wrote: >> Sorry if this is the wrong place for this (I'm kind of a newbie...), but I'm >> having some problems accessing xnu through CVS. I'm registered through >> Apple, and I'm using :pserver:laprej@anoncvs.opensource.apple.com:/cvs/apsl >> as my CVSROOT environment variable. Once I log in, attempting to check out >> xnu gives the error: >> >> "cvs server: cannot find module `xnu' - ignored >> cvs [checkout aborted]: cannot expand modules" > > According to the Apple open source folks, the CVS servers are now only going > to house "short fuse" projects that may be updated between MacOS X releases. > > The official way to get all the other source is to take te time to click on > each link on one of the relase pages. > > The master source release page can be found at: > > http://www.opensource.apple.com/darwinsource/index.html > > So to get the MacOS X 10.2.5 version of xnu, you'd need to click on the Darwin > 6.5 link and then download the xnu tar.gz file. > > William Kucharski > kucharsk(a)mac.com > _______________________________________________ > 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. > -- Jean-Edouard BABIN Mail: Jeb(a)jeb.com.fr Web : www.Jeb.com.fr IRC : Jeb @ Undernet _______________________________________________ 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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How to get latest xnu and other source modules
by William Kucharski 20 Apr '03

20 Apr '03

>Sorry if this is the wrong place for this (I'm kind of a newbie...), but I'm >having some problems accessing xnu through CVS. I'm registered through >Apple, and I'm using :pserver:laprej@anoncvs.opensource.apple.com:/cvs/apsl >as my CVSROOT environment variable. Once I log in, attempting to check out >xnu gives the error: > >"cvs server: cannot find module `xnu' - ignored >cvs [checkout aborted]: cannot expand modules" According to the Apple open source folks, the CVS servers are now only going to house "short fuse" projects that may be updated between MacOS X releases. The official way to get all the other source is to take te time to click on each link on one of the relase pages. The master source release page can be found at: http://www.opensource.apple.com/darwinsource/index.html So to get the MacOS X 10.2.5 version of xnu, you'd need to click on the Darwin 6.5 link and then download the xnu tar.gz file. William Kucharski kucharsk(a)mac.com _______________________________________________ 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: Getting xnu
by Felix Kronlage 20 Apr '03

20 Apr '03

On Sun, Apr 20, 2003 at 08:37:05PM +0930, Andre Pang wrote: > I get the same error; presumably the CVS server is having a Technical > Difficulty or two. > > In the meantime, the .tar.gz should suffice: > http://www.opensource.apple.com/darwinsource/10.2.5/ > ... or for xnu specifically, > > > http://www.opensource.apple.com/darwinsource/tarballs/10.2.5/apsl/ > xnu.tar.gz > (You'll need your APSL username/password to grab that file). don't forget, there's also the 10.2.5 xnu over at the OpenDarwin Repositorty. % cvs -d :pserver:anonymous@anoncvs.opendarwin.org:/Volumes/src/cvs/od login (password is empty) % cvs -d :pserver:anonymous@anoncvs.opendarwin.org:/Volumes/src/cvs/od co -r OD_APPLE_10_2_5 src/xnu and there's also the copy of the Apple Repository at: :pserver:anonymous@cvs.opendarwin.org:/Volumes/src/cvs/Apple http://www.opendarwin.org/doc/en/articles/opendarwin/cvs_howto/#anoncvs-ope… arwin explains things closer. -fkr -- gpg-fingerprint: 076E 1E87 3E05 1C7F B1A0 8A48 0D31 9BD3 D9AC 74D0 |Felix Kronlage | whois -h whois.ripe.net FKR-RIPE | |http://www.hazardous.org/fkr/ | fkr(a){grummel.net|opendarwin.org} | [demime 0.98b removed an attachment of type application/pgp-signature] _______________________________________________ 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: Getting xnu
by Andre Pang 20 Apr '03

20 Apr '03

On Sunday, April 20, 2003, at 01:22 PM, Justin LaPre wrote: Sorry if this is the wrong place for this (I'm kind of a newbie...), but I'm having some problems accessing xnu through CVS. I'm registered through Apple, and I'm using :pserver:laprej@anoncvs.opensource.apple.com:/cvs/apsl as my CVSROOT environment variable. Once I log in, attempting to check out xnu gives the error: "cvs server: cannot find module `xnu' - ignored cvs [checkout aborted]: cannot expand modules" I get the same error; presumably the CVS server is having a Technical Difficulty or two. In the meantime, the .tar.gz should suffice: http://www.opensource.apple.com/darwinsource/10.2.5/ ... or for xnu specifically, http://www.opensource.apple.com/darwinsource/tarballs/10.2.5/apsl/ xnu.tar.gz (You'll need your APSL username/password to grab that file). -- % Andre Pang : just.your.average.bounty.hunter _______________________________________________ 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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Dynamically changeable max processes per uid
by Brian Tabone 20 Apr '03

20 Apr '03

A while back on the darwin-kernel list, someone mentioned wanting to be able to dynamically increment the max number of processes per uid. Currently, Darwin has the value hard coded to be 100. I have modified the kernel so that you can now dynamically change the maximum number of processes per uid during runtime. Here is the rundown: There was already a variable in the source code, called maxprocperuid. It looks like this feature was either already in the kernel once before, or is planned for in the future. However, as it stands, the variable is currently unused. What I have done is link this variable to a sysctl so that you can do a sysctl -w kern.maxprocperuid=### to set it during runtime. I then replaced references to CHILD_MAX, with references to maxprocperuid and added some sanity checking. I have put maxprocperuid into the same scope as maxproc (Global). ------------------------------------------------------------------------ ------------------------------------------------------------------------ ------ My changes are made in: bsd/sys/proc.h bsd/conf/param.c bsd/kern/kern_fork.c bsd/kern/kern_resource.c bsd/kern/kern_sysctl.c What changed: bsd/sys/proc.h 1 Set maxprocperuid's scope to be global ( The same scope as maxproc) bsd/conf/param.c 1 Declared maxprocperuid, and set it to CHILD_MAX so that the default is still 100 on bootup bsd/kern/kern_fork.c 1 Check the maxprocperuid value on each call to fork1() and vfork(), if process count exceeds it, set the processes soft limit to be equal to maxprocperuid and return EAGAIN bsd/kern/kern_resource.c 1 Check the processes hard limit and set it to maxprocperuid if it exceeds maxprocperuid bsd/kern/kern_sysctl.c 1 Tie maxprocperuid to a sysctl, so that the root user may set the value and read the value via the sysctl interface. (ie via sysctl kern.maxprocperuid) 2 Added sanity checking so that when maxproc or maxprocperuid is changed, the kernel checks to be sure that maxprocperuid is less than maxproc. If not, it sets maxprocperuid to maxproc - 100 ------------------------------------------------------------------------ ------------------------------------------------------------------------ Getting the changes: 1) Go to my personal website and Download http://www.hybridmachine.com/darwin_maxprocperuid.tgz 2) Download the 10.2.5 Darwin sourcecode from Apple and untar it 3) cd into xnu 4) copy the darwin_maxprocperuid.tgz file into the current directory 5) tar xvzf darwin_maxprocperuid.tgz 6) Read the ABOUT_darwin_maxprocperuid.txt file <-- Tells you how to use the new feature 7) Read the README and build the kernel 8) Read the "Booting alternate kernels" text file that I have included in the .tgz file 9) Boot the alternate kernel and enjoy If you are feeling lazy, you can use the pre-compiled kernel included in the darwin_maxprocperuid.tgz file. Simply do step 8, copy the mach_kernel.new to /, and reboot I recommend building your own kernel, however. ------------------------------------------------------------------------ ------------------------------------------------------------------------ These changes are licensed under the APSL, and while I hope they are useful I make NO WARRANTY regarding them. This is my first foray into kernel hacking, feedback and constructive criticism are very welcome! _______________________________________________ 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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Getting xnu
by Justin LaPre 20 Apr '03

20 Apr '03

Sorry if this is the wrong place for this (I'm kind of a newbie...), but I'm having some problems accessing xnu through CVS. I'm registered through Apple, and I'm using :pserver:laprej@anoncvs.opensource.apple.com:/cvs/apsl as my CVSROOT environment variable. Once I log in, attempting to check out xnu gives the error: "cvs server: cannot find module `xnu' - ignored cvs [checkout aborted]: cannot expand modules" Any help? Thanks. -Justin _______________________________________________ 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: Debugging question
by Quinn 19 Apr '03

19 Apr '03

At 16:04 -0700 17/4/03, Eric Long wrote: Yeah. I've got a bug that only reproduces with Airport. Another DTS engineer has been looking into kernel debugger issues recently, so yesterday I ran this question by him. He suggested that you try the following: 1. In the Network preference panel, enable both AirPort and built-in Ethernet. 2. Place AirPort above Ethernet in the port list. 3. Configure the built-in Ethernet to use a static address on a fake subnet. 4. Connect your debugging machine to the built-in Ethernet, and configure it to use a static address on the same subnet. This should allow you to use AirPort for your network operations while kernel debugging over the Ethernet. S+E -- Quinn "The Eskimo!" <http://www.apple.com/developer/> Apple Developer Technical Support * Networking, Communications, Hardware _______________________________________________ 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: Darwin source for Mac OS X 10.2.5
by Justin Walker 18 Apr '03

18 Apr '03

On Thursday, Apr 17, 2003, at 19:40 US/Pacific, Roger Midmore wrote: I want to install the new Darwin kernel on a second partition on my PowerBook to play around with and learn Darwin. Is there anyway to download the complete source for darwin 6.5 with all the standard packages. http://www.opensource.apple.com/darwinsource/10.2.5/index.html has everything but they are broken up into different projects. I don't believe that there is a "make world" mechanism for Darwin. You have to download the individual projects and go through each. I think there are also ordering issues that make this slightly less than trivial. Regards, Justin -- Justin C. Walker, Curmudgeon-At-Large * Institute for General Semantics | When LuteFisk is outlawed | Only outlaws will have | LuteFisk *--------------------------------------*-------------------------------* _______________________________________________ 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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