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 <email@hidden> 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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