[yz@bogon ~]$ nm ~/postgresql/pg_bin/bin/postgres
0000000000926880 r a1
0000000000926800 r a2
0000000000926780 r a3
0000000000926700 r a4
0000000000926680 r a5
0000000000926600 r a6
0000000000ba87a0 b abbrevcache
000000000078e0d0 T AbortBufferIO
000000000057d580 T AbortCurrentTransaction
0000000000ba2700 b abortedRecPtr
                 U abort@@GLIBC_2.2.5
000000000057d650 T AbortOutOfAnyTransaction
……
0000000000a03cc0 r alert.8094
……