Regarding SIGSEGV

Hi all, I know that when a thread in an application do invalid memory reference, OS generates SIGSEGV(segmentation fault) signal and terminates application. What if we handle this signal by defining a signal handler to perform to terminate only the thread did invalid memory reference. So, that the application will not be terminated. Also, is there any way, we can find when SIGSEGV is generated to get the invalid memory reference and thread id, who caused this fault. I know debuggers are written in such fashion. Can anyone point me to right direction. Thanks in advance. -- Regards, Sri.