site_archiver@lists.apple.com Delivered-To: Darwin-kernel@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@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

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