September 2008 - Darwin-dev

RE: spinlock under fork()?
by Nathan Herring 19 Sep '08

19 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AckZNscjgzKUryxET66ZXmfTBetUIABYwrOg Thread-topic: spinlock under fork()? rdar://6233224 -----Original Message----- From: Terry Lambert [mailto:tlambert@apple.com] Sent: Wednesday, September 17, 2008 7:32 PM To: Nathan Herring Cc: Brian Mastenbrook; darwin-dev(a)lists.apple.com Subject: Re: spinlock under fork()? On Sep 17, 2008, at 6:52 PM, Nathan Herring wrote: > Fair enough. What's the official behavior of malloc_zone_register > supposed to be? If it's supposed to not handle multiple- > registrations, then I can post a documentation bug to better > document that that's the behavior and that furthermore it needn't be > called after malloc_create_zone. If it's supposed to handle multiple- > registrations (i.e., politely does nothing), then there's clearly a > bug either in it or somewhere in the Safari-used code that is > revealed by it, and that needs to be radared. > > On 9/17/08 6:20 PM, "Brian Mastenbrook" <brian(a)mastenbrook.net> wrote: > > malloc_create_zone calls malloc_zone_register itself. That comment > is a bit confusing, and I'm not sure under what circumstances anyone > would want to call malloc_zone_register themselves. I'm also not > sure why this leads to a spinlock, but clearly something doesn't > like having the same zone in the zone list twice. Please file a different bug: "malloc_zone_register(0 of an already registered zone should result in an error". -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

Apple remote driver
by Shayne Wissler 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:mime-version:content-type:content-transfer-encoding :content-disposition; bh=ItaW7k7+HtKnGAIJHbf18Mqr+IAP9dydtNCGK6CJc1c=; b=IpmE7w61OQYC6zNk0+blRunO12t8tYhBjyRQNuHtG5vF2/sBIF0Qg/yuYJlngE0qWx FWfoNFGXlluSb0RgTgD8h2jRvMLtNho3/puW1+1tJ35GaBCvArTLMxhIPsi4JuMpgOBm oEz2Y6cBiG6WXEiI2MALr8C3LSMWyYpj0xqkA= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:mime-version:content-type :content-transfer-encoding:content-disposition; b=H5p+szgFUIBsSTtobL1fpDv8EIBLOJeg/ZYQH0Aj0tqB5aQEQjLJHsx/r1yv3I8D32 wXaCkQyvhmxfQU5rRJhEUyrtQP77/U9+VOLJ3jk0tvVJ134Xw8OrtYLleOJ5zhTHYCDB ucHRz36dfzXaKUjhjNDSAB7+RmxkUap1xzpRk= Hello, I have a very specific application where I want the remote to behave in a particular way, I need to be able to capture all button press/release events as they happen, and I do not want the remote control to activate any other program but my own (not Front Row, not volume control, nothing). I am starting to think that the best way to achieve this is to write my own driver, ideally starting with the actual source Apple uses. Is that available as part of the free Darwin source? Any pointers or suggestions would be greatly appreciated. Thanks, Shayne Wissler _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

Re: Open Source Releases: Mac OS X 10.5.5 and iPhone 2.1
by William Siegrist 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 18, 2008, at 8:35 AM, David Elliott wrote: Bill, An oversight on my part. The sources are available now. Thanks -Bill _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com Very nice! I don't recall ever seeing the source released this soon after the update was released. A few things though. 1. Is there any chance we could get a link to http://src.macosforge.org/BinaryDrivers/9A581/ somewhere on the http://www.opensource.apple.com/darwinsource/ page or instead maybe the http://developer.apple.com/opensource/ index.html page? I'll look into this. They live on src.macosforge.org since they are normally loaded into DarwinBuild environments, but I suppose we can add a link there. Obviously that's not open source but rather licensed binaries (and thank you for this) but I can't think of any better place to put the link where it will actually be seen by someone trying to build up a Darwin system. 2. I don't recall having seen IOBDStorageFamily-6 in any of the source lists before but it is now listed in 10.5.3 through 10.5.5 sources. Except it goes to a dead link. I assume you are in the process of working on this one. smime.p7s

1 0

Re: Darwin Based OS
by Brad Parker 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Organization: Heeltoe Consulting Ben Greenfield wrote: > >On Sep 18, 2008, at 1:19 PM, Eli Bach wrote: > >> I would suggest using Linux for two reasons: > >I would go with one of the bsds I find the documentation on linuxes to >be ad-hoc and written by people that may or may not know the correct >way to do things. > >Specifically I find the netBSD to be very well done. I'd have to agree. Last time I tried, admittedly 3-4 years ago I built netbsd for a vax from absolute scratch and it worked perfectly. This is noteworthy since all it needed was a posix compliant o/s (I used linux). It built the compiler, all the toolchain and then built the kernel and all the user land in once fell swoop. A very impressive feat. -brad _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0

Re: Darwin Based OS
by Ben Greenfield 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 18, 2008, at 1:19 PM, Eli Bach wrote: Specifically I find the netBSD to be very well done. but that is only "IMHO"... But that is only "IMHO"... On Sep 18, 2008, at 10:12 AM, J. Todd Slack wrote: Hi All, I would probably do my work in a VMWare Fusion instance. Thoughts are appreciated. -Jason _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/ebach2%40gmail.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/ben%40cogs.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I would suggest using Linux for two reasons: I would go with one of the bsds I find the documentation on linuxes to be ad-hoc and written by people that may or may not know the correct way to do things. -there is a much wider variety of drivers available as part of the OS itself -the build/install system for Linux is much more straightforward than trying to build Darwin+all the cli tools [just to bootstrap to a cli for you to put your UI onto]. I am thinking about a research project for an educational\hobby OS type project. What does everyone think about using Darwin? I am not totally familiar with the state of Darwin, but it must be decent because that is what Apple uses as it's base, no? I have been writing a GUI Toolkit and a session manager for years and I want to take some time and put everything together for a small hobby OS project, get some experience, etc. This email sent to ebach2(a)gmail.com This email sent to ben(a)cogs.com This email sent to site_archiver(a)lists.apple.com

1 0

Re: Darwin Based OS
by Eli Bach 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:from:to :in-reply-to:content-type:content-transfer-encoding:mime-version :subject:date:references:x-mailer; bh=hmVWLd7KPnZLX6pInp1OONSmwNl61LAlInIMKG+b5To=; b=tj9DBDR/Yif0r7E+VXuxI7Uqt2yl0IzsxRgL8qUdyBxjgkMobcTEztXwjSg9pjVP/t Z5Y8D+mUy2Ovz7yR0JlbYjBQOoUm6AjQnRL48lw4cA5goYS1ycLu04SMPe46JQ1ksgS9 YhpxbwO1JBdlRSiGfxWDV/wVNj2YEo6e/JfpM= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:from:to:in-reply-to:content-type :content-transfer-encoding:mime-version:subject:date:references :x-mailer; b=vFKf3nGhrv04OfA1+bufem9yx+eTQbm5I9kAmMhrRW9p6zyXqT0w40F2XMCMlmmq0W 7wseaNA0v/cotBF+QPtHEdfboEsgJi36d5YUPQuZwb8SfpdvkEgAWwpkC8umquuIEsRR rA7leG3KnCwSJGOfrHSQphZzjDQpG/yd7qgjI= I would suggest using Linux for two reasons: But that is only "IMHO"... On Sep 18, 2008, at 10:12 AM, J. Todd Slack wrote: Hi All, I would probably do my work in a VMWare Fusion instance. Thoughts are appreciated. -Jason _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/ebach2%40gmail.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… -there is a much wider variety of drivers available as part of the OS itself -the build/install system for Linux is much more straightforward than trying to build Darwin+all the cli tools [just to bootstrap to a cli for you to put your UI onto]. I am thinking about a research project for an educational\hobby OS type project. What does everyone think about using Darwin? I am not totally familiar with the state of Darwin, but it must be decent because that is what Apple uses as it's base, no? I have been writing a GUI Toolkit and a session manager for years and I want to take some time and put everything together for a small hobby OS project, get some experience, etc. This email sent to ebach2(a)gmail.com This email sent to site_archiver(a)lists.apple.com

1 0

Darwin Based OS
by J. Todd Slack 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hi All, I would probably do my work in a VMWare Fusion instance. Thoughts are appreciated. -Jason _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… I am thinking about a research project for an educational\hobby OS type project. What does everyone think about using Darwin? I am not totally familiar with the state of Darwin, but it must be decent because that is what Apple uses as it's base, no? I have been writing a GUI Toolkit and a session manager for years and I want to take some time and put everything together for a small hobby OS project, get some experience, etc. This email sent to site_archiver(a)lists.apple.com

1 0

Re: Open Source Releases: Mac OS X 10.5.5 and iPhone 2.1
by David Elliott 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Bill, -Dave On Sep 17, 2008, at 8:54 PM, William Siegrist wrote: http://www.opensource.apple.com/darwinsource/ Thank you. ---- William Siegrist Darwin Team _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… Very nice! I don't recall ever seeing the source released this soon after the update was released. A few things though. 1. Is there any chance we could get a link to http://src.macosforge.org/BinaryDrivers/9A581/ somewhere on the http://www.opensource.apple.com/darwinsource/ page or instead maybe the http://developer.apple.com/opensource/index.html page? Obviously that's not open source but rather licensed binaries (and thank you for this) but I can't think of any better place to put the link where it will actually be seen by someone trying to build up a Darwin system. 2. I don't recall having seen IOBDStorageFamily-6 in any of the source lists before but it is now listed in 10.5.3 through 10.5.5 sources. Except it goes to a dead link. I assume you are in the process of working on this one. Other than that, great. And again, the quick release is very much appreciated. The open source components for Mac OS X 10.5.5 and iPhone 2.1 (including the SDK) have been released. They can be found at the usual location: This email sent to site_archiver(a)lists.apple.com

1 0

Re: spinlock under fork()?
by Terry Lambert 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 9/17/08 6:20 PM, "Brian Mastenbrook" <brian(a)mastenbrook.net> wrote: -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… On Sep 17, 2008, at 6:52 PM, Nathan Herring wrote: Fair enough. What’s the official behavior of malloc_zone_register supposed to be? If it’s supposed to not handle multiple- registrations, then I can post a documentation bug to better document that that’s the behavior and that furthermore it needn’t be called after malloc_create_zone. If it’s supposed to handle multiple- registrations (i.e., politely does nothing), then there’s clearly a bug either in it or somewhere in the Safari-used code that is revealed by it, and that needs to be radared. malloc_create_zone calls malloc_zone_register itself. That comment is a bit confusing, and I'm not sure under what circumstances anyone would want to call malloc_zone_register themselves. I'm also not sure why this leads to a spinlock, but clearly something doesn't like having the same zone in the zone list twice. Please file a different bug: "malloc_zone_register(0 of an already registered zone should result in an error". This email sent to site_archiver(a)lists.apple.com

1 0

Re: spinlock under fork()?
by Nathan Herring 18 Sep '08

18 Sep '08

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thread-index: AckZLLvT0S/pNzCbQZKlZlzFj+dkRgABGh5D Thread-topic: spinlock under fork()? _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-dev mailing list (Darwin-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-dev/site_archiver%40lists.app… This email sent to site_archiver(a)lists.apple.com

1 0