September 2009 - Darwin-dev

Re: GCD code in plain old C, and a correctness question
by David Leimbach 08 Sep '09

08 Sep '09

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Re: GCD code in plain old C, and a correctness question
by Gwynne Raskind 08 Sep '09

08 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com You can prove it by running this command from Terminal: /usr/bin/php -r 'fwrite(STDIN, "Hello, world!\n");' -- Gwynne _______________________________________________ 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 8, 2009, at 1:33 PM, Kevin Van Vechten wrote: I believe the "????" is the result of writing (int)-1 to stdout. Actually it's much worse. I had used calloc to allocate the context, which had the write fd. I had written -1 to "stdin" (0 is stdin right?) Writing to stdin causes the console to barf up ?'s ? My program is wrong, but that's interesting behavior all the same. You're right, stdin is file descriptor zero, which is where the (int)-1 is being written to causing the "????". I don't know this for certain, but I suspect there's nothing unusual about this behavior of writing to stdin: For a program run from a terminal, ssh session, etc., stdin, as well as stdout and stderr, is a tty - or more exactly, a pty. If you look look into how pseudo-terminals are used, especially the login_tty() function, you find that the pty slave fd is dup2()d to stdin, stdout, and stderr. This fd was, in turn, opened with O_RDWR. The result is that, in your program, you're reading from and writing to the same descriptor regardless of which stream you use. Therefore, writing to stdin is exactly the same as writing to stdout and stderr, as long as no shell redirections or pipes are in place (more exactly, as long as isatty(STDIN_FILENO) returns 1). So, why four question marks? The hexadecimal value of (int)-1 is 0xFFFFFFFF (two's complement signed integer). Write that to a byte stream (such as a pseudo terminal), and you've output four 0xFF bytes. 0xFF is an illegal character in UTF-8 (the default encoding for Terminal and Xcode) and some other encodings, so whatever your console is, it spits out a "nonprintable character" character. Depending on your font and console, this could be ?, <FF> in inverse video, the question mark in a black diamond, etc. This email sent to site_archiver(a)lists.apple.com

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Re: GCD code in plain old C, and a correctness question
by Kevin Van Vechten 08 Sep '09

08 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Kevin _______________________________________________ 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 8, 2009, at 8:22 AM, David Leimbach wrote: On Tue, Sep 8, 2009 at 12:05 AM, Kevin Van Vechten <kvv(a)apple.com> wrote: I believe the "????" is the result of writing (int)-1 to stdout. Actually it's much worse. I had used calloc to allocate the context, which had the write fd. I had written -1 to "stdin" (0 is stdin right?) Writing to stdin causes the console to barf up ?'s ? My program is wrong, but that's interesting behavior all the same. You're right, stdin is file descriptor zero, which is where the (int)-1 is being written to causing the "????". This email sent to site_archiver(a)lists.apple.com

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Re: GCD code in plain old C, and a correctness question
by David Leimbach 08 Sep '09

08 Sep '09

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Re: GCD code in plain old C, and a correctness question
by David Leimbach 08 Sep '09

08 Sep '09

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Re: GCD code in plain old C, and a correctness question
by Kevin Van Vechten 08 Sep '09

08 Sep '09

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Re: error -10810
by Jamison Hope 08 Sep '09

08 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Sep 5, 2009, at 5:57 AM, Terry Lambert wrote: (4) after the problem happens, issue the command: exec ps gaxlwww -Jamie Hello , on both powerpc-apple-darwin9 and i686-apple-darwin9 nothing will launch from the dock, double clicking ... or open -a. log out / back in solves the problem. cheers, Iain -- Jamison Hope The PTR Group www.theptrgroup.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… In the first extra terminal window. This will replace the shell, but tell you about the processes (which you will be able to scroll back to because of #2) (5) look at who the parent process is for all the zombies. If there are no zombies, you should be able to identify a forkbomb by process name. Otherwise look for third party software to reinstall to see if you can resolve a deadlock. (6) in the second extra terminal window, shoot that process in the head (if it's a forkbomb type runaway, you can exec the kill command to use the shell process slot to do the kill in the second window; you will lose the shell but you should be able to open new windows after that, if you killed the right thing) (7) never, ever, run that process again, unless you have fixed it to reap its children correctly/not run away, and recompiled and reinstalled it Hmm… I just tried that for kicks to see if I had any zombies today on this machine, and I found three. I don't think I'll be able to fix and recompile the culprits, though, because the PPIDs indicate that they are: UID PID PPID CPU PRI NI VSZ RSS WCHAN STAT TT TIME COMMAND 501 47822 202 0 46 0 446724 26844 - S ?? 0:12.45 /Applications/iCal.app/Contents/MacOS/iCal -psn_0_12446686 501 47836 47822 0 0 0 0 0 - Z ?? 0:00.00 (iCalExternalSync) 501 49325 1 0 14 17 130424 7684 - SNs ?? 0:01.03 /System/Library/Frameworks/CoreServices.framework/Frameworks/ Metadata.framework/Versions/A/Support/mdworker MDSImporterWorker com.apple.Spotlight.ImporterWorker.501 501 49364 49325 0 0 17 0 0 - ZN ?? 0:00.00 (sh) 501 49643 202 0 62 0 477116 52340 - U ?? 0:23.62 /Applications/Mail.app/Contents/MacOS/Mail -psn_0_12676118 501 49725 49643 0 0 0 0 0 - Z ?? 0:00.00 (AddressBookSync) On Sep 5, 2009, at 1:51 AM, IainS <developer(a)sandoe-acoustics.co.uk> wrote: I have a phenomenon I'm trying to understand. I run a large dejagnu testsuite (the gcc make check) from time to time and some amazing interaction has appeared. almost (>90%) on every occasion I run the testsuite it trashes application launch. The error message reported is [alert dialogue] "the application xxxx cannot be launched. -10810" neither google nor support on the apple website have proved illuminating on what the error message means .. and I'd like some opinions on how to debug this interaction. _______________________________________________ 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/tlambert %40apple.com This email sent to tlambert(a)apple.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/jrh %40theptrgroup.com This email sent to jrh(a)theptrgroup.com This email sent to site_archiver(a)lists.apple.com

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GCD code in plain old C, and a correctness question
by David Leimbach 08 Sep '09

08 Sep '09

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Re: Mac OS X Snow Leopard and 64-bit applications
by Michael Smith 07 Sep '09

07 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.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… This email sent to site_archiver(a)lists.apple.com

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Re: Mac OS X Snow Leopard and 64-bit applications
by Chris Ridd 06 Sep '09

06 Sep '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On 30 Aug 2009, at 19:21, Terry Lambert wrote: Eli Bach wrote: > > 1. The arbitrary limitation that if your computer 'only' as EFI32, > Apple prevents you from booting into the 64-bit kernel. MacOSX requires EFI64 to boot, probably because doing the bootstrap from 32- to 64-bit mode is a bit tricky. Did you mean NVRAM here, or NDRV? Cheers, Chris _______________________________________________ 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 Aug 29, 2009, at 10:55 AM, Andrew Gallatin <gallatin(a)cs.duke.edu> wrote: Actually it is because the NVRAM driver is built in the EFI. This email sent to site_archiver(a)lists.apple.com

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