July 2009 - Darwin-dev - lists.apple.com

fork of Darwin (spanish, italiano)
by Esteban Bodigami 19 Jul '09

19 Jul '09

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Re: The mutex is twice locked in different threads
by Wade Tregaskis 16 Jul '09

16 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Wade _______________________________________________ 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… PreLock thread(1822400) id(sync_report_9AC72CBD) owner(0) lock_count(0) Lock thread(1822400) id(sync_report_9AC72CBD) owner(1822400) lock_count(1) error(0) PreLock thread(181be00) id(sync_report_9AC72CBD) owner(1822400) lock_count(1) Lock thread(181be00) id(sync_report_9AC72CBD) owner(181be00) lock_count(1) error(0) PreUnlock thread(1822400) id(sync_report_9AC72CBD) owner(181be00) lock_count(1) Unlock thread(1822400) id(sync_report_9AC72CBD) owner(181be00) lock_count(1) error(1) Is this all you have? This doesn't prove double-locking; it's almost certainly just races and out of order log messages. Your PreLock seeing the old owner is just a race, and your PreLock+Lock appearing before the unlock is just your printfs being interleaved. You'd be better off using something like Shark's System Trace to look at this; you'll be able to see much more reliably what your locking patterns are (assuming there's actually any lock contention). What is the problem you're seeing that leads you to believe the lock is failing so? This email sent to site_archiver(a)lists.apple.com

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The mutex is twice locked in different threads
by Eugene Karpov 16 Jul '09

16 Jul '09

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:mime-version:received:date:message-id:subject :from:to:content-type; bh=/Uq96dwYXRY2lHFzqE+HrfQmbBUUjlL6raI5PIXXchE=; b=AbxfwuW+iGPQI4m2Mxs2KCVZh1VpPi6uxe3uWZmyLMbFK3WB2SUhYgTGMAl7NjHA7j DVyddcxG6ok2BHqvBeczJJjRo27oCCp+eASqOkRSsp0srwGo2ZY2XZ6MRznDoKOIiIFg NlG3Kejwgq51MXTV4O6jbirITPXmANuVwgvrI= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=a1sVQwkAINLRsSgTmu5qFFt/2YI4HI1MIOTCCmTOHcWILqc1hCyMWXbGu6/hbMjPvd 6PaDMX7cYxE2Gp1C7guYeGDvnb7pHuog5zmrSiwxnZ738DeKOKRXN7PawgNUPmlNNSan r0tsFDUrc+vAUQ1YSfjVuqB1PcZ+zT8Lwz2pQ= _______________________________________________ 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: 2048 bug
by Esteban Bodigami 16 Jul '09

16 Jul '09

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Re: Query on start function with dump_syms result
by Steve Checkoway 16 Jul '09

16 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jul 15, 2009, at 7:01 PM, Arnab Ganguly wrote: -- Steve Checkoway "Anyone who says that the solution is to educate the users hasn't ever met an actual user." -- Bruce Schneier _______________________________________________ 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 Could you please explain me about this start and _start function what is it about ? Is it like entry point of the code ? start is the entry point and it calls _start (which has the name __start in the assembly). See <http://www.opensource.apple.com/source/Csu/Csu-58.1.1/start.s > and <http://www.opensource.apple.com/source/Csu/Csu-58.1.1/crt.c>. smime.p7s

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Query on start function with dump_syms result
by Arnab Ganguly 16 Jul '09

16 Jul '09

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ThreadViewer plug-ins?
by Bill Janssen 15 Jul '09

15 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com Is there a plug-in architecture for ThreadViewer? I'm developing a lot of Python services, and it would be nice if I could instruct it how to show Python stack traces. Ditto for Java. 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

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Re: gdb problem with DYLD_INSERT_LIBRARIES and pthread in dylib constructor
by Jeff Johnson 15 Jul '09

15 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jul 15, 2009, at 2:17 PM, Greg Parker wrote: On Jul 15, 2009, at 12:07 PM, Jeff Johnson wrote: $ DYLD_INSERT_LIBRARIES=/path/to/my.dylib /path/to/the/executable However, I'm unable to run it in gdb: $ gdb /path/to/the/executable (gdb) set environment DYLD_INSERT_LIBRARIES=/path/to/my.dylib (gdb) run When I do that, I always get the following: /bin/bash: /usr/bin/arch: Operation not supported /bin/bash: /usr/bin/arch: Unknown error: 0 Program exited with code 01. Perfect, that works. Thanks! -Jeff _______________________________________________ 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. I'm experiencing a strange problem with gdb. I'm testing a version of a dylib that has a long-running pthread created in the constructor. This can be simulated with the example code at the end. If I use DYLD_INSERT_LIBRARIES to load the dylib on the command line, it works fine: By default, gdb runs a shell and /usr/bin/arch in order to launch your program. DYLD_INSERT_LIBRARIES is inserting your dylib into those processes as well, which apparently confuses /usr/bin/arch. Try `set start-with-shell 0` in gdb before running your program. This email sent to site_archiver(a)lists.apple.com

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Re: gdb problem with DYLD_INSERT_LIBRARIES and pthread in dylib constructor
by Greg Parker 15 Jul '09

15 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com On Jul 15, 2009, at 12:07 PM, Jeff Johnson wrote: $ DYLD_INSERT_LIBRARIES=/path/to/my.dylib /path/to/the/executable However, I'm unable to run it in gdb: $ gdb /path/to/the/executable (gdb) set environment DYLD_INSERT_LIBRARIES=/path/to/my.dylib (gdb) run When I do that, I always get the following: /bin/bash: /usr/bin/arch: Operation not supported /bin/bash: /usr/bin/arch: Unknown error: 0 Program exited with code 01. -- Greg Parker gparker(a)apple.com Runtime Wrangler _______________________________________________ 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. I'm experiencing a strange problem with gdb. I'm testing a version of a dylib that has a long-running pthread created in the constructor. This can be simulated with the example code at the end. If I use DYLD_INSERT_LIBRARIES to load the dylib on the command line, it works fine: By default, gdb runs a shell and /usr/bin/arch in order to launch your program. DYLD_INSERT_LIBRARIES is inserting your dylib into those processes as well, which apparently confuses /usr/bin/arch. Try `set start-with-shell 0` in gdb before running your program. This email sent to site_archiver(a)lists.apple.com

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gdb problem with DYLD_INSERT_LIBRARIES and pthread in dylib constructor
by Jeff Johnson 15 Jul '09

15 Jul '09

site_archiver(a)lists.apple.com Delivered-To: darwin-dev(a)lists.apple.com $ DYLD_INSERT_LIBRARIES=/path/to/my.dylib /path/to/the/executable However, I'm unable to run it in gdb: $ gdb /path/to/the/executable (gdb) set environment DYLD_INSERT_LIBRARIES=/path/to/my.dylib (gdb) run When I do that, I always get the following: /bin/bash: /usr/bin/arch: Operation not supported /bin/bash: /usr/bin/arch: Unknown error: 0 Program exited with code 01. int main(int argc, char *argv[]) { while (1) ; return 0; } -Jeff #include <pthread.h> #include <unistd.h> static void *MyThread(void *arg) { sleep(10); return NULL; } Hi. I'm experiencing a strange problem with gdb. I'm testing a version of a dylib that has a long-running pthread created in the constructor. This can be simulated with the example code at the end. If I use DYLD_INSERT_LIBRARIES to load the dylib on the command line, it works fine: On the other hand, if I uncomment the pthread_join line, it works fine. In other words, if the pthread is done before the constructor returns, it works, but if the pthread is still running, it dies. The nature of the executable doesn't seem to matter, it can be as simple as this: Is there something I need to do in gdb to get this to work? Or am I doing something wrong in the dylib? Are pthreads not supported in constructors? static __attribute__((constructor)) int LoadMyStuff(void) { static int didLoad = 0; if (!didLoad) { didLoad = 1; pthread_t aThread; pthread_create(&aThread, NULL, MyThread, NULL); //pthread_join(aThread, NULL); } return 0; } _______________________________________________ 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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