I stumbled across this issue while debugging a similar problem with the shared memory between app and graphics. This one is initialized to NULL, then boinc_init_shmem() is called, and if successful(!) a subsequent call to memset(shmem,0) crashes.
I saw this happen reproduceably when an App that has been compiled with a Mac OS X 10.4 SDK on 10.5 or 10.6 runs on 10.7 or 10.8 (an App compiled and linked 'natively' on 10.4 runs fine on all systems 10.4 - 10.8). Best, Bernd David Anderson <[email protected]> schrieb: >I can't immediately see how that could happen; >it looks like app_client_shm (the pointer to shared mem) >is 0 when this crash happens. >However, timer_handler() checks for app_client_shm being nonzero >before calling handle_heartbeat_msg(). > >And, as far as I can tell, >app_client_shm isn't being reset to zero anywhere. > >Is this reproducible? >We could try to debug it with printf()s. > >-- David > >On 19-Feb-2013 8:07 AM, Bernd Machenschalk wrote: >> This might or might not be related: >> >> When a (Mac OS X in this case, output is from an attached gdb) >program >> terminates after a short time, presumably before it received the >first >> hearbeat, apparently the timer thread crashes: >> >> 2013-02-19 16:58:53.3629 (10894) [normal]: done. calling >boinc_finish(0). >> 16:58:53 (10894): called boinc_finish >> >> Program received signal EXC_BAD_ACCESS, Could not access memory. >> Reason: KERN_PROTECTION_FAILURE at address: 0x00001000 >> [Switching to process 10894 thread 0x1603] >> 0x000f156b in MSG_CHANNEL::get_msg () >> $1 = <unknown type> >> #0 0x000f156b in MSG_CHANNEL::get_msg () >> #1 0x000ef2a7 in handle_heartbeat_msg () >> #2 0x000f02a6 in timer_thread () >> #3 0x98886ed9 in _pthread_start () >> #4 0x9888a6de in thread_start () >> (gdb) SIGBUS: bus error >> >> Could that be that something in handle_heartbeat_msg() needs to be >> protected? >> >> Best, >> Bernd >> >> _______________________________________________ >> boinc_dev mailing list >> [email protected] >> http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev >> To unsubscribe, visit the above URL and >> (near bottom of page) enter your email address. >> >_______________________________________________ >boinc_dev mailing list >[email protected] >http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev >To unsubscribe, visit the above URL and >(near bottom of page) enter your email address. _______________________________________________ boinc_dev mailing list [email protected] http://lists.ssl.berkeley.edu/mailman/listinfo/boinc_dev To unsubscribe, visit the above URL and (near bottom of page) enter your email address.
