memory - what does "exited abnormally with signal 9: Killed: 9" mean -

how read error codes appear in console?

<warning>:  ....... -exited abnormally signal 9: killed: 9 <warning>:  ....... -1 err = bad file descriptor (0x00000009) 

here signal 9 mean, there more signals apart it. documentation available it.

i kind of error, when app. launched xcode terminated "stop" button in xcode toolbar.

{another way error , press home button, double tap home button , close app. }

things worse when launch app. again, tapping on app. icon on ipad screen, app crashes , throws "libmobilegestalt copysystemversiondictionaryvalue: not lookup releasetype system version dictionary"

from finding on stack overflow , see error found in ios 6 devices.

this url states it's sigkill error , happens when "application being terminated immediately, without chance clean or catch , handle signal"

so, think releasing objets in "-(void) didreceivememorywarning" not solve it, definite solution?

-(void) didreceivememorywarning{     [super didreceivememorywarning];     //release objects     obj1=nil;     [view1 removefromsuperview];     view1=nil;     ........ } 

it means application received signal. signal handled applications, others, not. signal 9 means application needs killed, not handled process, linux scheduler. signal terminate process handled process sigterm(15), but, if process doesn't handle property, process continues live.

here major signals:

   signal     value     action   comment    ──────────────────────────────────────────────────────────────────────    sighup        1       term    hangup detected on controlling terminal                                  or death of controlling process    sigint        2       term    interrupt keyboard    sigquit       3       core    quit keyboard    sigill        4       core    illegal instruction    sigabrt       6       core    abort signal abort(3)    sigfpe        8       core    floating point exception    sigkill       9       term    kill signal    sigsegv      11       core    invalid memory reference    sigpipe      13       term    broken pipe: write pipe no                                  readers    sigalrm      14       term    timer signal alarm(2)    sigterm      15       term    termination signal    sigusr1   30,10,16    term    user-defined signal 1    sigusr2   31,12,17    term    user-defined signal 2    sigchld   20,17,18    ign     child stopped or terminated    sigcont   19,18,25    cont    continue if stopped    sigstop   17,19,23    stop    stop process    sigtstp   18,20,24    stop    stop typed @ terminal    sigttin   21,21,26    stop    terminal input background process    sigttou   22,22,27    stop    terminal output background process