June 2005 - Darwin-dev - lists.apple.com

Named semaphores
by Mark Stultz 07 Jun '05

07 Jun '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-dev(a)lists.apple.com User-agent: Microsoft-Entourage/11.0.0.040405 If an application creates a named semaphore, and that application crashes, will the instance/count of that semaphore going away or decrement? Two applications depend on a specific semaphore, and therefore one cannot "sem_unlink" without the other having bad effects. I would like to just sem_close them, but it seems that if an application crashes, the instance of that semaphore does not go with it. Any ideas? Mark Stultz United Developers mstultz(a)udgames.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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Is CFPlugin cross-platform?
by Nicola Vitacolonna 06 Jun '05

06 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Cannot recognize type of executable for CFBundle/CFPlugin ... Best regards Nicola _______________________________________________ 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… Hi, CFPlugin and CFBundle are part of CF-lite, the open source "light" version of Core Foundation, which has been ported to Linux and Windows. I want to write a cross-platform application that uses plugins. How am I supposed to build a bundle/plugin under non-Darwin platforms? In particular, what is the equivalent of the bundle executable in these platforms? I have built a shared library libMyPlugin.so (in Linux), and have changed Info.plist's CFBundleExecutable to libMyPlugin.so, but when I run the application that loads the plugin I get the following error: Browsing the CF source code, I've noticed some "BINARY_SUPPORT_DLL" #define's, so I guess that there must be a way to load a shared library. But I can't figure out how. Any hint? (maybe this question is off-topic here, but I have found absolutely no information on the web) This email sent to site_archiver(a)lists.apple.com

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OT: Survey facing design patterns and communication
by Nico 06 Jun '05

06 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Hello everybody! We are a group of students at "Freie Universitaet Berlin". As part of our computer science studies we are going to do a survey facing the use of design patterns in communication. Examples of design patterns are "Abstract Factory", "Singleton", "Composite", "Iterator" and "Listener". If you know what we are talking about, you are welcome to take part in our survey. It takes about 5 minutes to fill out the form. Just jump to: http://study.beatdepot.de If you agree, we will send you the results of our survey. Thanks in advance for your participation! And sorry for the interruption of your discussion. _______________________________________________ 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: setjmp/longjmp changed in Tiger
by David N. Williams 06 Jun '05

06 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Organization: University of Michigan User-agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.7.2) Gecko/20040804 Netscape/7.2 Many thanks to all who contributed results for testsetjmp.c on systems available to them! Here's the summary: http://www-personal.umich.edu/~williams/archive/computation/setjmp-fpmode.h… You'll see that there are systems in both camps. Perhaps there's an indication that HPUX is evolving from no-auto save/restore to yes-auto save/restore, like darwin. At the end of the above file I've included a short polemic in favor of no-auto save/restore. -- David _______________________________________________ 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: bless command and target mode
by Stéphane Thiell 06 Jun '05

06 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Stéphane On 1 juin 05, at 21:07, Kevin Van Vechten wrote: Can you provide more details? What system version is on the G5? - Kevin On Jun 1, 2005, at 1:49 AM, Stéphane Thiell wrote: On 31 mai 05, at 19:37, Kevin Van Vechten wrote: OK thanks for the info. I use the bless command from the G5 like this: %s being the mount point of the PowerBook in target mode. Thanks, Stéphane Thiell _______________________________________________ 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've found the problem. :) An OS 9 "System Folder" was on the source volume and was blessed automatically by my "script" _after_ the OS X's bless (cf. my bless command). Blessing an OS 9 system folder seems to cancel the OS X bless and thus result in a non-bootable volume. All bless command returns 0, no error. Thanks for the '--' tip, I'll change it as needed. At least on Tiger, the documented options to bless have two -- instead of a single -, are you sure the bless command is even succeeding? Try adding --verbose to the command and inspect the output for further clues... The --setBoot argument (which used to be called --setOF) does not change the on-disk representation at all, but instead changes the boot-device open firmware variable (`nvram boot-device`). It's not possible (as far as I know) to modify an open firmware variable on a machine that is in target disk mode. Thus, I don't think your problem has any relation to the bootx.bootinfo file, but instead is due to the open firmware variable not being set on the PowerBook (until you set it via the option key and clicking the icon at boot). The thing is, the disk doesn't even appear when I boot the PowerBook with the option key. I need to select it on the startup disk preferences pane to make it work (so another boot volume is needed on the PowerBook). bless -folder "%s/System/Library/CoreServices" -bootinfo "/usr/ standalone/ppc/bootx.bootinfo" -label "%@" This email sent to site_archiver(a)lists.apple.com

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Re: Compilation of kext.
by Rustam Muginov 06 Jun '05

06 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com User-agent: Microsoft-Entourage/11.0.0.040405 As far as I know, KEXTs should be developed with Embedded C++ - a subset of C++ without some C++ features like exception handling. This could make using of STL impossible inside the kernel extensions because STL using exceptions On 6/5/05 1:16 PM, "Nicolas Diez" <nicolas.diez(a)gmail.com> wrote: > Hello, > I'm sorry if I ask a dumb question, but while I am developing an > application which I should put in IOHIDFamily kext, I'm using cstdlib. > This makes gcc to occur some errors. In fact, I have the above errors > when I try to compile : > error : iostream : so such file or directory > error : map : no such file or directory > > and so one. When I build the application outside the kext build, it > compiles clearly. I have checked project options in XCode2.0, but I > can't find why cstdlib, map, vector and other classes couldn't be > found. > > Thanks for all. > > Nicolas. > _______________________________________________ > 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/rustam%40ruscode.com > > This email sent to rustam(a)ruscode.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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Compilation of kext.
by Nicolas Diez 05 Jun '05

05 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=XNuiMmXkBswfsKIzvGrO/KWmGe2DSHOSh2fIGdbotKrDWW4s/5taYEWwySJBp2JOVT9re1RYQ/Pi7ix9qaOCFdmPB44T1n4B9WC9y86GUDTdbcX2iV7VgmEm5GVh1irLiLwBQGiwuYbiHG3vpphk62tl5cWkCiN1T5KRYbtD8Ps= Hello, I'm sorry if I ask a dumb question, but while I am developing an application which I should put in IOHIDFamily kext, I'm using cstdlib. This makes gcc to occur some errors. In fact, I have the above errors when I try to compile : error : iostream : so such file or directory error : map : no such file or directory and so one. When I build the application outside the kext build, it compiles clearly. I have checked project options in XCode2.0, but I can't find why cstdlib, map, vector and other classes couldn't be found. Thanks for all. Nicolas. _______________________________________________ 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: Newbie to Darwin linking issue I think?
by Shantonu Sen 05 Jun '05

05 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com /usr/lib/libSystem.B.dylib(malloc.So): 901200d0 T __malloc_fork_child 90032bc4 T __malloc_fork_parent 90032a58 T __malloc_fork_prepare 90008574 T _calloc 90005ccc T _free 90003424 T _malloc a000425c D _malloc_check_counter a0004258 D _malloc_check_each a0004260 D _malloc_check_start 90043b4c T _malloc_create_zone 901201b8 T _malloc_debug a0004264 D _malloc_debug_flags 90014f38 T _malloc_default_zone 901207f0 T _malloc_destroy_zone 9012009c T _malloc_error 9011fc7c T _malloc_get_all_zones 9011fa74 T _malloc_get_zone_name 90032f88 T _malloc_good_size a0004268 D _malloc_logger a0004270 D _malloc_num_zones 9011fa7c T _malloc_printf 900442c0 T _malloc_set_zone_name 90120168 T _malloc_singlethreaded 90048318 T _malloc_size 90120430 T _malloc_zone_batch_free 9012054c T _malloc_zone_batch_malloc 90014e7c T _malloc_zone_calloc 9011f860 T _malloc_zone_check 900137e4 T _malloc_zone_free 90052ef4 T _malloc_zone_from_ptr 9011ffcc T _malloc_zone_log 900039f8 T _malloc_zone_malloc 9011fe50 T _malloc_zone_print 9011fd90 T _malloc_zone_print_ptr_info 90033c4c T _malloc_zone_realloc 9011f910 T _malloc_zone_register 9011fef4 T _malloc_zone_statistics 9011fb5c T _malloc_zone_unregister 90120648 T _malloc_zone_valloc a000426c D _malloc_zones 90120708 T _mstats 90017360 T _realloc 9002c0bc T _set_malloc_singlethreaded 9004a3a4 T _valloc 901206fc T _vfree /usr/lib/libSystem.B.dylib(devname.So): 900be638 T _devname 90062320 T _devname_r int main(int argc, char *argv[]) { char dev[100], *dev2; devname_r(234881027, S_IFBLK, dev, sizeof(dev)); printf("%s\n", dev); dev2 = devname(234881027, S_IFBLK); printf("%s\n", dev2); return 0; } [shantonu@repl]$ cat devname.c #include <sys/types.h> #include <string.h> #ifdef DO_DEVNAME char *devname(dev_t dev, mode_t type) { return "something"; } #endif #ifdef DO_DEVNAME_R char *devname_r(dev_t dev, mode_t type, char *buf, int len) { if(len < 10) return NULL; strcpy(buf, "something"); return buf; } #endif Shantonu On Jun 4, 2005, at 4:55 PM, Damien Cooke wrote: Thanks for the hint: I am now linking like this But I now get: Damien On 05/06/2005, at 8:51 AM, Shantonu Sen wrote: Shantonu On Jun 4, 2005, at 4:06 PM, Damien Cooke wrote: I build the two object files as such gcc -g -fPIC -c source/lpmalloc.c -o output/lpmalloc.o gcc -g -fPIC -c source/global.c -o output/global.o This is what I get: ld: for architecture ppc ld: Undefined symbols: _printf libtool: internal link edit command failed Damien This email sent to ssen(a)opendarwin.org _______________________________________________ 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 order to correctly override a function, the 32-bit linker requires that all global symbols in the function's containing module be overridden. For your case, this means you need to implement at most: [shantonu@repl]$ nm -g "/usr/lib/libSystem.B.dylib(malloc.So)" | grep -v " U " As a demonstration, here's an example using the devname(3) API, which has devname() and devname_r() implemented in a single module in libSystem: [shantonu@repl]$ nm -g "/usr/lib/libSystem.B.dylib(devname.So)" | grep -v " U " In order to provide a dylib that replaces the implementation of one of these functions (correctly), I need to implement both functions. [shantonu@repl]$ cat test.c #include <stdlib.h> #include <stdio.h> #include <sys/stat.h> If my dylib just implements devname(), I get this warning: [shantonu@repl]$ cc -c devname.c -DDO_DEVNAME [shantonu@repl]$ cc -dynamiclib -o libdevname.dylib devname.o - install_name $PWD/libdevname.dylib [shantonu@repl]$ cc -o test test.c -L. -ldevname /usr/bin/ld: warning multiple definitions of symbol _devname ./libdevname.dylib(devname.o) definition of _devname /usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../../libSystem.dylib (devname.So) definition of _devname [shantonu@repl]$ nm -mg test| grep devname (undefined [lazy bound]) external _devname (from libdevname) (undefined [lazy bound]) external _devname_r (from libSystem) [shantonu@repl]$ ./test disk0s5 something Note here that devname() came from my dylib but devname_r() came from libSystem. This is exactly the kind of behavior the linker is trying to prevent. An analagous situation would be to using the system's calloc() with your custom free(), with no guarantee that they are compatible. If you just implement devname_r(), you get a similar but different warning (and behavior) [shantonu@repl]$ cc -c devname.c -DDO_DEVNAME_R [shantonu@repl]$ cc -dynamiclib -o libdevname.dylib devname.o - install_name $PWD/libdevname.dylib [shantonu@repl]$ cc -o test test.c -L. -ldevname /usr/bin/ld: warning suggest use of -bind_at_load, as lazy binding may result in errors or different symbols being used symbol _devname_r used from dynamic library /usr/lib/gcc/powerpc- apple-darwin8/4.0.0/../../../libSystem.dylib(devname.So) not from earlier dynamic library /tmp/libdevname.dylib(devname.o) [shantonu@repl]$ nm -mg test| grep devname (undefined [lazy bound]) external _devname (from libSystem) (undefined [lazy bound]) external _devname_r (from libSystem) [shantonu@repl]$ ./test disk0s5 disk0s5 In this case, because of the order in which the linker searched libraries, the system version was used. Only if you override both functions does the entire module get overridden: [shantonu@repl]$ cc -c devname.c -DDO_DEVNAME -DDO_DEVNAME_R [shantonu@repl]$ cc -dynamiclib -o libdevname.dylib devname.o - install_name $PWD/libdevname.dylib [shantonu@repl]$ cc -o test test.c -L. -ldevname [shantonu@repl]$ nm -mg test| grep devname (undefined [lazy bound]) external _devname (from libdevname) (undefined [lazy bound]) external _devname_r (from libdevname) [shantonu@repl]$ ./test something something For your case, you might get away with just implementing on the order of 20 functions and constants, based on what symbols are used internally to libSystem and by clients. In the worst case, you'll need to implement all 45 symbols so that nothing can cause libSystem.B.dylib(malloc.So) to be accessed (and cause duplicate symbol warnings with your dylib) cc -dynamiclib -fPIC -o bin/liblpmalloc.so output/lpmalloc.o output/ global.o ld: warning multiple definitions of symbol _malloc output/lpmalloc.o definition of _malloc in section (__TEXT,__text) /usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../../libSystem.dylib (malloc.So) definition of _malloc So how do I tell it I am building a replacement for malloc other than re-implementing the System.dylib ? Is there a way of dropping duplicate entries? Why are you using libtool(1) instead of the compiler driver cc(1) to create your shared library? Your problem is that you are not linking against libSystem.dylib (via -lSystem). You're also missing a host of other libraries automatically included when you link a dylib with cc(1). for example: /usr/bin/libtool -dynamic -arch_only ppc -noall_load - weak_reference_mismatches non-weak -v -o libfoo.dylib -L/usr/lib/ gcc/powerpc-apple-darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple- darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../.. foo.o -lgcc -lgcc_eh -lSystemStubs -lmx -lSystem You should use cc/gcc and the -dynamiclib option to build your library. You probably also want to read the various man pages and use the -install_name flag as well. Sorry for the dumb question. I am porting my malloc to Darwin. I have built it as a shared dynamic library on Solaris. However I am having a large amount of problems with this on OS X 10.4.1 using XCode 2.0 and gcc 4.0 Then I use Libtool as such libtool -dynamic -o bin/ liblpmalloc.so output/lpmalloc.o output/global.o I am probably doing something really dumb but any help would be greatly appreciated. _______________________________________________ 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/ssen% 40opendarwin.org This email sent to site_archiver(a)lists.apple.com

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Re: Newbie to Darwin linking issue I think?
by Damien Cooke 04 Jun '05

04 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Thanks for the hint: I am now linking like this But I now get: Damien On 05/06/2005, at 8:51 AM, Shantonu Sen wrote: Shantonu On Jun 4, 2005, at 4:06 PM, Damien Cooke wrote: I build the two object files as such gcc -g -fPIC -c source/lpmalloc.c -o output/lpmalloc.o gcc -g -fPIC -c source/global.c -o output/global.o This is what I get: ld: for architecture ppc ld: Undefined symbols: _printf libtool: internal link edit command failed Damien This email sent to ssen(a)opendarwin.org _______________________________________________ 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… cc -dynamiclib -fPIC -o bin/liblpmalloc.so output/lpmalloc.o output/ global.o ld: warning multiple definitions of symbol _malloc output/lpmalloc.o definition of _malloc in section (__TEXT,__text) /usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../../libSystem.dylib (malloc.So) definition of _malloc So how do I tell it I am building a replacement for malloc other than re-implementing the System.dylib ? Is there a way of dropping duplicate entries? Why are you using libtool(1) instead of the compiler driver cc(1) to create your shared library? Your problem is that you are not linking against libSystem.dylib (via -lSystem). You're also missing a host of other libraries automatically included when you link a dylib with cc(1). for example: /usr/bin/libtool -dynamic -arch_only ppc -noall_load - weak_reference_mismatches non-weak -v -o libfoo.dylib -L/usr/lib/ gcc/powerpc-apple-darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple- darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../.. foo.o -lgcc -lgcc_eh -lSystemStubs -lmx -lSystem You should use cc/gcc and the -dynamiclib option to build your library. You probably also want to read the various man pages and use the -install_name flag as well. Sorry for the dumb question. I am porting my malloc to Darwin. I have built it as a shared dynamic library on Solaris. However I am having a large amount of problems with this on OS X 10.4.1 using XCode 2.0 and gcc 4.0 Then I use Libtool as such libtool -dynamic -o bin/liblpmalloc.so output/lpmalloc.o output/global.o I am probably doing something really dumb but any help would be greatly appreciated. _______________________________________________ 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/ssen% 40opendarwin.org This email sent to site_archiver(a)lists.apple.com

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Re: Newbie to Darwin linking issue I think?
by Shantonu Sen 04 Jun '05

04 Jun '05

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Shantonu On Jun 4, 2005, at 4:06 PM, Damien Cooke wrote: I build the two object files as such gcc -g -fPIC -c source/lpmalloc.c -o output/lpmalloc.o gcc -g -fPIC -c source/global.c -o output/global.o This is what I get: ld: for architecture ppc ld: Undefined symbols: _printf libtool: internal link edit command failed Damien This email sent to ssen(a)opendarwin.org _______________________________________________ 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… Why are you using libtool(1) instead of the compiler driver cc(1) to create your shared library? Your problem is that you are not linking against libSystem.dylib (via -lSystem). You're also missing a host of other libraries automatically included when you link a dylib with cc(1). for example: /usr/bin/libtool -dynamic -arch_only ppc -noall_load - weak_reference_mismatches non-weak -v -o libfoo.dylib -L/usr/lib/gcc/ powerpc-apple-darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple- darwin8/4.0.0 -L/usr/lib/gcc/powerpc-apple-darwin8/4.0.0/../../.. foo.o -lgcc -lgcc_eh -lSystemStubs -lmx -lSystem You should use cc/gcc and the -dynamiclib option to build your library. You probably also want to read the various man pages and use the -install_name flag as well. Sorry for the dumb question. I am porting my malloc to Darwin. I have built it as a shared dynamic library on Solaris. However I am having a large amount of problems with this on OS X 10.4.1 using XCode 2.0 and gcc 4.0 Then I use Libtool as such libtool -dynamic -o bin/liblpmalloc.so output/lpmalloc.o output/global.o I am probably doing something really dumb but any help would be greatly appreciated. _______________________________________________ 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/ssen% 40opendarwin.org This email sent to site_archiver(a)lists.apple.com

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