Hi Jens,
Now I developed UI application to perform the iTunes preferences changes.
I installed my application on Mountain Lion.when I upgraded OS version from
Mountain Lion to Mavericks 10.9.1 my application freezes.
And I took Sampling process in Activity monitor. Below is the output.
-------------
Sort by top of stack, same collapsed (when >= 5):
__psynch_cvwait (in libsystem_kernel.dylib) 6169
__workq_kernreturn (in libsystem_kernel.dylib) 5609
mach_msg_trap (in libsystem_kernel.dylib) 3181
kevent64 (in libsystem_kernel.dylib) 1565
__recvfrom (in libsystem_kernel.dylib) 722
start_wqthread (in libsystem_pthread.dylib) 82
__psynch_mutexwait (in libsystem_kernel.dylib) 77
objc_msgSend (in libobjc.A.dylib) 51
CFRelease (in CoreFoundation) 29
szone_free (in libsystem_malloc.dylib) 28
tiny_malloc_from_free_list (in libsystem_malloc.dylib) 28
_kernelrpc_mach_port_insert_member_trap (in
libsystem_kernel.dylib) 17
szone_malloc_should_clear (in libsystem_malloc.dylib) 16
OSSpinLockLock (in libsystem_platform.dylib) 15
pthread_threadid_np (in libsystem_pthread.dylib) 15
__psynch_mutexdrop (in libsystem_kernel.dylib) 14
bool objc::DenseMapBase<objc::DenseMap<objc_object*, unsigned long,
true, objc::DenseMapInfo<objc_object*> >, objc_object*, unsigned long,
objc::DenseMapInfo<objc_object*>,
true>::LookupBucketFor<objc_object*>(objc_object* const&,
std::__1::pair<objc_object*, unsigned long> const*&) const (in
libobjc.A.dylib) 14
szone_free_definite_size (in libsystem_malloc.dylib) 14
__mtx_droplock (in libsystem_pthread.dylib) 13
CFRetain (in CoreFoundation) 12
OSAtomicCompareAndSwap32Barrier$VARIANT$mp (in
libsystem_platform.dylib) 12
__CFBasicHashDrain (in CoreFoundation) 12
szone_size (in libsystem_malloc.dylib) 12
CFBasicHashGetCountOfKey (in CoreFoundation) 11
CFEqual (in CoreFoundation) 11
mk_timer_arm (in libsystem_kernel.dylib) 11
syscall_thread_switch (in libsystem_kernel.dylib) 11
OSAtomicCompareAndSwap64Barrier$VARIANT$mp (in
libsystem_platform.dylib) 10
__CFStringHash (in CoreFoundation) 9
_platform_memmove$VARIANT$sse42 (in
libsystem_platform.dylib) 9
_pthread_mutex_check_init (in libsystem_pthread.dylib) 9
tiny_free_list_add_ptr (in libsystem_malloc.dylib) 9
CFBasicHashCreateCopy (in CoreFoundation) 8
_Block_copy_internal (in libsystem_blocks.dylib) 8
_pthread_mutex_lock (in libsystem_pthread.dylib) 8
CFAllocatorDeallocate (in CoreFoundation) 7
CFBasicHashAddValue (in CoreFoundation) 7
CFGetAllocator (in CoreFoundation) 7
_OSSpinLockLockSlow (in libsystem_platform.dylib) 7
_platform_bzero$VARIANT$sse42 (in libsystem_platform.dylib)
7
stat$INODE64 (in libsystem_kernel.dylib) 7
CFBasicHashFindBucket (in CoreFoundation) 6
WTF::fastMalloc(unsigned long) (in JavaScriptCore) 6
_CFRetain (in CoreFoundation) 6
_CFRuntimeCreateInstance (in CoreFoundation) 6
__CFStringEncodeByteStream (in CoreFoundation) 6
__commpage_gettimeofday (in libsystem_kernel.dylib) 6
objc_clear_deallocating (in libobjc.A.dylib) 6
CFHash (in CoreFoundation) 5
OSSpinLockUnlock (in libsystem_platform.dylib) 5
WTF::fastFree(void*) (in JavaScriptCore) 5
_CFURLInitWithURLString (in CoreFoundation) 5
__getpid (in libsystem_kernel.dylib) 5
get_tiny_previous_free_msize (in libsystem_malloc.dylib) 5
pthread_mutex_unlock (in libsystem_pthread.dylib) 5
---------
If I uninstall my application and reinstall again then no problem.But Why
My application is freezing after upgrade from mountain lion to mavericks
10.9.1
*?.*
*And there was no problem when I upgraded My MacBookPro from Mountain Lion
to Mavericks 10.9 version.*
Thanks and Regards,
Madhavi G.
On Wed, Dec 25, 2013 at 1:15 AM, Jens Alfke <j...@mooseyard.com> wrote:
>
> On Dec 23, 2013, at 10:58 PM, Madhavi Gundeti <madhavi.gundet...@gmail.com>
> wrote:
>
> I am developing a daemon which runs as root
>
>
> That’s not recommended, because the daemon will have the ability to do all
> kinds of bad things. A bug could destroy someone’s system, or worse, a
> security hole in your code could let an attacker take over the OS.
>
> It’s best to follow the “Principle of least privilege”: run the daemon as
> a separate account and give that account only the privileges it needs. Or
> run as an agent process under the current user’s account. Apple has a tech
> note about daemons and agents that goes into this.
>
> —Jens
>
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