ThreadSanitizer: data race rbtdb.c:1535 in add32

• Binary: named
• Commit: d0bc45be
• Test: zero

WARNING: ThreadSanitizer: data race (pid=21745)
  Write of size 2 at 0x7b44000503dc by thread T6 (mutexes: write M1003031114526233856, write M884530149331044048):
    #0 add32 rbtdb.c:1535 (libdns.1505.dylib:x86_64+0xbffd1)
    #1 addrdataset rbtdb.c:6591 (libdns.1505.dylib:x86_64+0xbab25)
    #2 dns_db_addrdataset db.c:744 (libdns.1505.dylib:x86_64+0x2ce6e)
    #3 resquery_response resolver.c:6344 (libdns.1505.dylib:x86_64+0x143237)
    #4 run task.c:1134 (libisc.1504.dylib:x86_64+0x3be51)

  Previous read of size 2 at 0x7b44000503dc by thread T4:
    #0 rdataset_getownercase rbtdb.c:9416 (libdns.1505.dylib:x86_64+0xc2155)
    #1 towiresorted rdataset.c:721 (libdns.1505.dylib:x86_64+0x121601)
    #2 dns_rdataset_towiresorted rdataset.c:566 (libdns.1505.dylib:x86_64+0x12136e)
    #3 dns_message_rendersection message.c:2080 (libdns.1505.dylib:x86_64+0x762a3)
    #4 ns_client_send client.c:517 (libns.1502.dylib:x86_64+0x1d8c)
    #5 query_send query.c:562 (libns.1502.dylib:x86_64+0x162ea)
    #6 ns_query_done query.c:10868 (libns.1502.dylib:x86_64+0x11ee2)
    #7 query_prepresponse query.c (libns.1502.dylib:x86_64+0x20769)
    #8 query_gotanswer query.c (libns.1502.dylib:x86_64+0x18839)
    #9 query_lookup query.c:5562 (libns.1502.dylib:x86_64+0x136f7)
    #10 ns__query_start query.c:5441 (libns.1502.dylib:x86_64+0x1144c)
    #11 ns_query_start query.c:5162 (libns.1502.dylib:x86_64+0x172a8)
    #12 ns__client_request client.c:2154 (libns.1502.dylib:x86_64+0x5dd2)
    #13 udp_recv_cb udp.c:318 (libisc.1504.dylib:x86_64+0x2aa91)
    #14 uv__udp_io <null>:6886864 (libuv.1.dylib:x86_64+0x13244)

  Location is heap block of size 271 at 0x7b44000503c0 allocated by thread T6:
    #0 malloc <null>:6886896 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x4e65a)
    #1 default_memalloc mem.c:685 (libisc.1504.dylib:x86_64+0x21bbf)
    #2 isc___mem_allocate mem.c:598 (libisc.1504.dylib:x86_64+0x22a1c)
    #3 isc___mem_get mem.c:2387 (libisc.1504.dylib:x86_64+0x22037)
    #4 isc__mem_get mem.c:2365 (libisc.1504.dylib:x86_64+0x1cd3e)
    #5 dns_rdataslab_fromrdataset rdataslab.c:266 (libdns.1505.dylib:x86_64+0x123903)
    #6 addrdataset rbtdb.c:6441 (libdns.1505.dylib:x86_64+0xb9931)
    #7 dns_db_addrdataset db.c:744 (libdns.1505.dylib:x86_64+0x2ce6e)
    #8 resquery_response resolver.c:6344 (libdns.1505.dylib:x86_64+0x143237)
    #9 run task.c:1134 (libisc.1504.dylib:x86_64+0x3be51)

  Mutex M1003031114526233856 is already destroyed.

  Mutex M884530149331044048 is already destroyed.

  Thread T6 (tid=1725576, running) created by main thread at:
    #0 pthread_create <null>:6886944 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x2a9cd)
    #1 isc_thread_create thread.c:75 (libisc.1504.dylib:x86_64+0x58db1)
    #2 isc_taskmgr_create task.c:1410 (libisc.1504.dylib:x86_64+0x3b340)
    #3 main main.c:902 (named:x86_64+0x10000dfa6)

  Thread T4 (tid=1725574, running) created by main thread at:
    #0 pthread_create <null>:6886944 (libclang_rt.tsan_osx_dynamic.dylib:x86_64h+0x2a9cd)
    #1 isc_thread_create thread.c:75 (libisc.1504.dylib:x86_64+0x58db1)
    #2 isc_nm_start netmgr.c:152 (libisc.1504.dylib:x86_64+0x23b84)
    #3 main main.c:895 (named:x86_64+0x10000df4e)

SUMMARY: ThreadSanitizer: data race rbtdb.c:1535 in add32