I am working on multi-threading application it is dumping frequently.I could not able to analyaze the core.The core is showing like this

Core was generated by `thread-process '. Program terminated with signal 6, Aborted.

0 0x00000038f4e30045 in raise () from /lib64/libc.so.6

(gdb) where

0 0x00000038f4e30045 in raise () from /lib64/libc.so.6

1 0x00000038f4e31ae0 in abort () from /lib64/libc.so.6

2 0x00000038f4e681bb in __libc_message () from /lib64/libc.so.6

3 0x00000038f4e72b96 in free () from /lib64/libc.so.6

4 0x000000000046a137 in std::string::substr ()

5 0x000000000042c549 in std::operator<< , std::allocator > ()

6 0x000000000042cc1d in std::operator<< , std::allocator > ()

7 0x000000000046b069 in std::string::substr ()

8 0x000000000046c866 in std::string::substr ()

9 0x0000000000431062 in std::operator<< , std::allocator > ()

10 0x00000038f5a062e7 in start_thread () from /lib64/libpthread.so.0

11 0x00000038f4ece3bd in clone () from /lib64/libc.so.6