December 2005 - Darwin-kernel

Re: pthread_mutex_lock returns errorcode 22
by Terry Lambert 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com May I suggest this book? PThreads Programming A POSIX Standard for Better Multiprocessing Bradford Nichols, Dick Buttlar, Jacqueline Proulx Farrell ISBN: 1-56592-115-1 -- Terry _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… On Dec 16, 2005, at 6:24 AM, Amol Gajewar wrote: I am Sorry for email sent earlier pthread_mutex_lock returns error code 2. The above mentioned function pthread_mutex_lock returns error code as 22. Due to this an exception is thrown as Abort Trap . If possible give suggestion or comments above function should work properly. You should ask questions like this on the appropriate list; this is not a kernel related question, it is a pthreads programming issue; you are using the API incorrectly. Specifically, you aren't calling pthread_mutex_init() before trying to use the mutex. This email sent to site_archiver(a)lists.apple.com

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Re: pthread_mutex_lock returns errorcode 22
by Herb Petschauer 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=fk0RCOx47D3SU0KvJe7FDHV4iDso8XVDe38RgSuB1CarjtCurKbR/04ZOknWklqwivvNcRYas7/sXzNmiXj07nIW7eqP5f6FbAQX7b4kXgLLi1k4HQbn/CpNqp7bZUXh6yVldQGH24VyR5GEntq5CgPopaBP07AkGl1hHp/EyPY= Again: Wrong mailing list (redirected to darwin-userlevel, AGAIN). No code snippet. -H. On 12/16/05, Amol Gajewar <gajewar.amol(a)spsoftindia.com> wrote: > > I am Sorry for email sent earlier pthread_mutex_lock returns error code 2. > The above mentioned function pthread_mutex_lock returns error code as 22. > Due to this an exception is thrown as Abort Trap . > > > If possible give suggestion or comments above function should work > properly. > > > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/darwin-kernel/bogvardi%40gmail.com > > This email sent to bogvardi(a)gmail.com > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Threading and Synchronization in Mass storage driver
by Herb Petschauer 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=q47Cut87sgdljp+CtyNoFo8y+lWgpOJVgxwbDUgXrjrjULpWvE6zDw7rqdojSpGrSGLq/XwMGk6PLxH53om1nm5FJiXh+9tJ04nb1i7+PX+xcFQwKTji8IxDnBCu/ZqkxjxgxR5uAa7zbPll0BpXiMUrqvPMgavbLyM2lEeLbbc= Your panic begins at: /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/iokit/Kernel/IOLib.c:140 -H. On 16 Dec 2005 19:19:35 +0530, Yogesh P <pahilwan.yogesh(a)spsoftindia.com> wrote: > Hi Herb, > > I have setup a 2 machine debugging to trace out the exact cause of the > crash while using the IOLockSleep() synchronization primitive. > > During 2 machine debugging, I have found that the threads get created > successfully but when the call goes to IOLockSleep(request_lock, (void*) > thread_id, false)the driver gets crashed. > > I put the stack backtrace for the same crash as follows: > > gdb() > Breakpoint 1, com_CoreSnap_driver::init(OSDictionary*) (this=0x1c7be20, > properties=0x1d74a60) at Spsoft_CoreSnapDriver.cpp:64 > 64 IOLog("\n Inside Init function...\n"); > (gdb) n > Current language: auto; currently c++ > Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 > lines. > (gdb) n > Breakpoint 1, com_CoreSnap_driver::init(OSDictionary*) (this=0x1b110a0, > properties=0x1d74880) at Spsoft_CoreSnapDriver.cpp:64 > 64 IOLog("\n Inside Init function...\n"); > (gdb) n > Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 > lines. > gdb) n > 78 for(i = 0; i < NUM_HANDLER_THREADS; i++) > (gdb) n > 80 thr_id[i] = i; > (gdb) n > 82 IOLog("\nInit():: thr_id = %d\n", thr_id[i]); > (gdb) n > Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 > lines. > (gdb) n > 84 IOThread thread_t = > IOCreateThread(com_CoreSnap_driver::handle_request_loop, (void*) > &thr_id[i]); > (gdb) n > 86 if(thread_t) > (gdb) n > 88 IOLog("\nInit():: Thread created successfully\n"); > (gdb) n > Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 > lines. > (gdb) n > Program received signal SIGTRAP, Trace/breakpoint trap. > Debugger (message=0x2d4440 "panic") at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/ppc/model_dep.c:627 > 627 TRAP_DEBUGGER; > (gdb) bt > #0 Debugger (message=0x2d4440 "panic") at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/ppc/model_dep.c:627 > #1 0x00034d84 in panic (str=0x2d43c8 "{%d} Assertion failed: file > \"%s\", line %d: %s\n") at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/debug.c:198 > #2 0x0004201c in assert_wait (event=0x0, interruptible=0) at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/sched_prim.c:619 > #3 0x00042424 in thread_sleep_mutex (event=0x1927d98, mutex=0x0, > interruptible=1) at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/sched_prim.c:749 > #4 0x20e65530 in com_CoreSnap_driver::handle_request_loop(void*) > (data=0xcb63cb4) at > /System/Library/Frameworks/Kernel.framework/Headers/IOKit/IOLocks.h:112 > #5 0x002777d4 in ioThreadStart () at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/iokit/Kernel/IOLib.c:140 > Current language: auto; currently c > (gdb) n > 635 splx(spl); > (gdb) n > 637 } > (gdb) n > panic (str=0x2d43c8 "{%d} Assertion failed: file \"%s\", line %d: %s\n") > at > /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/debug.c:202 > 202 PANIC_LOCK(); > (gdb) n > 204 PANIC_UNLOCK(); > (gdb) n > 203 panicstr = (char *)0; > (gdb) n > 204 PANIC_UNLOCK(); > (gdb) n > 205 thread->wait_queue = save_waits[cpu_number()]; /* > Restore the wait queue */ > (gdb) n > 206 if (return_on_panic) { > (gdb) n > 205 thread->wait_queue = save_waits[cpu_number()]; /* > Restore the wait queue */ > (gdb) n > 206 if (return_on_panic) { > (gdb) n > 211 kdb_printf("panic: We are hanging here...\n"); > (gdb) n > 212 while(1); > (gdb) n > > Please suggest so that I can pinpoint the issue. > > Thanks in advance, > Yogesh Pahilwan > > > > > > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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pthread_mutex_lock returns errorcode 22
by Amol Gajewar 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: Threading and Synchronization in Mass storage driver
by Yogesh P 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Hi Herb, I have setup a 2 machine debugging to trace out the exact cause of the crash while using the IOLockSleep() synchronization primitive. During 2 machine debugging, I have found that the threads get created successfully but when the call goes to IOLockSleep(request_lock, (void*) thread_id, false)the driver gets crashed. I put the stack backtrace for the same crash as follows: gdb() Breakpoint 1, com_CoreSnap_driver::init(OSDictionary*) (this=0x1c7be20, properties=0x1d74a60) at Spsoft_CoreSnapDriver.cpp:64 64 IOLog("\n Inside Init function...\n"); (gdb) n Current language: auto; currently c++ Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 lines. (gdb) n Breakpoint 1, com_CoreSnap_driver::init(OSDictionary*) (this=0x1b110a0, properties=0x1d74880) at Spsoft_CoreSnapDriver.cpp:64 64 IOLog("\n Inside Init function...\n"); (gdb) n Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 lines. gdb) n 78 for(i = 0; i < NUM_HANDLER_THREADS; i++) (gdb) n 80 thr_id[i] = i; (gdb) n 82 IOLog("\nInit():: thr_id = %d\n", thr_id[i]); (gdb) n Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 lines. (gdb) n 84 IOThread thread_t = IOCreateThread(com_CoreSnap_driver::handle_request_loop, (void*) &thr_id[i]); (gdb) n 86 if(thread_t) (gdb) n 88 IOLog("\nInit():: Thread created successfully\n"); (gdb) n Line number 65438 out of range; Spsoft_CoreSnapDriver.cpp has 1568 lines. (gdb) n Program received signal SIGTRAP, Trace/breakpoint trap. Debugger (message=0x2d4440 "panic") at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/ppc/model_dep.c:627 627 TRAP_DEBUGGER; (gdb) bt #0 Debugger (message=0x2d4440 "panic") at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/ppc/model_dep.c:627 #1 0x00034d84 in panic (str=0x2d43c8 "{%d} Assertion failed: file \"%s\", line %d: %s\n") at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/debug.c:198 #2 0x0004201c in assert_wait (event=0x0, interruptible=0) at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/sched_prim.c:619 #3 0x00042424 in thread_sleep_mutex (event=0x1927d98, mutex=0x0, interruptible=1) at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/sched_prim.c:749 #4 0x20e65530 in com_CoreSnap_driver::handle_request_loop(void*) (data=0xcb63cb4) at /System/Library/Frameworks/Kernel.framework/Headers/IOKit/IOLocks.h:112 #5 0x002777d4 in ioThreadStart () at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/iokit/Kernel/IOLib.c:140 Current language: auto; currently c (gdb) n 635 splx(spl); (gdb) n 637 } (gdb) n panic (str=0x2d43c8 "{%d} Assertion failed: file \"%s\", line %d: %s\n") at /Users/yogeshp/PROJECTS/SnapShot/DarwinCode/xnu-517.7.21/osfmk/kern/debug.c:202 202 PANIC_LOCK(); (gdb) n 204 PANIC_UNLOCK(); (gdb) n 203 panicstr = (char *)0; (gdb) n 204 PANIC_UNLOCK(); (gdb) n 205 thread->wait_queue = save_waits[cpu_number()]; /* Restore the wait queue */ (gdb) n 206 if (return_on_panic) { (gdb) n 205 thread->wait_queue = save_waits[cpu_number()]; /* Restore the wait queue */ (gdb) n 206 if (return_on_panic) { (gdb) n 211 kdb_printf("panic: We are hanging here...\n"); (gdb) n 212 while(1); (gdb) n Please suggest so that I can pinpoint the issue. Thanks in advance, Yogesh Pahilwan _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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pthread_mutex_lock returns errcode
by Amol Gajewar 16 Dec '05

16 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: pthread_mutex_lock returns err code 2
by Herb Petschauer 15 Dec '05

15 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=B4vuI4s+NywOyxQkR0GjyUrpeUc0Tbo9GaNlq+t7SNoeA0OjaR0Q+qu0SCBtCkWm1WNBI9JDrcuQIsWbTOZ+8vKMu4FCJ4HckEINwOjYbAIhjCiMOE+D41VlGV78HE/iXa7nAEkdDQi2rBqjIaMBVBVqvzoPSvlCAcAXY9EAKDM= Shifted to darwin-userlevel from darwin-kernel. I can see it returning "22", EINVAL, but not "2". Anyway, you'll need to post a lot more info than this to get a decent reply... -H. On 12/15/05, Amol Gajewar <gajewar.amol(a)spsoftindia.com> wrote: > > The System call named pthread_mutex_lock((& mutex.mut)) returns err code 2 > on MAC - OS X / 10.3.3 gcc 3.3. > I am not able to understand reason behind this. > Do anybody have explaination for this. > Is there any work around for this problem. > > with regards > Amol Gajewar > > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) > Help/Unsubscribe/Update your Subscription: > http://lists.apple.com/mailman/options/darwin-kernel/bogvardi%40gmail.com > > This email sent to bogvardi(a)gmail.com > _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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Re: nodeNames and actual files
by Mike Smith 15 Dec '05

15 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com On Dec 14, 2005, at 10:45 PM, Pavan Chebbi wrote: Why are you scanning HFS' private data structures? = Mike _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… I am scanning all the leaf nodes pointed to by the Header pointer of the Header node of the catalog file btree. In this process I am listing all the nodeName from the HFSPlusCatalogKey of each leaf node. My problem is that, most of the time when I search manually for a file present in the nodeName of the leaf nodes, I dont find it. Also, the filesnames contanied in nodeName are not on the disk. ( When I search for them manually). That is to say that when I try to find the file with filename equal to nodeName, I dont find it on the disk. However there are instances when the file with nodeName existing on the disk. In a nutshell, I have written a program that scans all the leaf nodes of the catalogfile tree(using fLink and bLink) and lists nodeName of each leaf node. I dont find the listed nodeNames as files on the disk. (only some of them I find). Also! , when I search for a specific file, it is not present in the list of nodeNames. Kindly help me. Without knowing what it is that you are actually trying to achieve, that will be very difficult. This email sent to site_archiver(a)lists.apple.com

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pthread_mutex_lock returns err code 2
by Amol Gajewar 15 Dec '05

15 Dec '05

site_archiver(a)lists.apple.com Delivered-To: darwin-kernel(a)lists.apple.com Importance: Normal The System call named pthread_mutex_lock((& mutex.mut)) returns err code 2 on MAC - OS X / 10.3.3 gcc 3.3. I am not able to understand reason behind this. Do anybody have explaination for this. Is there any work around for this problem. with regards Amol Gajewar _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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nodeNames and actual files
by Pavan Chebbi 15 Dec '05

15 Dec '05

site_archiver(a)lists.apple.com Delivered-To: Darwin-kernel(a)lists.apple.com Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=Message-ID:Received:Date:From:Subject:To:MIME-Version:Content-Type:Content-Transfer-Encoding; b=PSNoOyq4h2j7FZN4GnsCneHKouO65zD6N2QHwSy0QttYDcvUApgOXXNXDERY1iJi5tO06t5K18Obad1YOlL9gvKhS7A5C3GnGbEQJ6W1sSmTErTtCEYEho/6xHh0wpdwATLTTnkcIa5Y7j28R+GwsmtOKV0crxwCHq9QnTd82rs= ; _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.… This email sent to site_archiver(a)lists.apple.com

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