chenBright commented on PR #3290:
URL: https://github.com/apache/brpc/pull/3290#issuecomment-4541338795
When I run the ubring demo, the server crashes.
```shell
./ubring_performance_client -use_ubring=true -echo_attachment=true
-attachment_size=1048576
./ubring_performance_server -use_ubring=true
```
```
Using host libthread_db library
"/usr/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `./ubring_performance_server -use_ubring=true'.
--Type <RET> for more, q to quit, c to continue without paging--
Program terminated with signal SIGBUS, Bus error.
#0 __memset_avx512_unaligned_erms () at
../sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S:228
warning: 228 ../sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S: No
such file or directory
[Current thread is 1 (Thread 0x7f69dcff96c0 (LWP 19284))]
(gdb) bt
#0 __memset_avx512_unaligned_erms () at
../sysdeps/x86_64/multiarch/memset-vec-unaligned-erms.S:228
#1 0x0000558a87ac463b in memset (__len=<optimized out>, __ch=0,
__dest=<optimized out>)
at /usr/include/x86_64-linux-gnu/bits/string_fortified.h:59
#2 brpc::ubring::ShmLocalCalloc (shm=shm@entry=0x7f68f06f7e90) at
/workspace/cgm/brpc/src/brpc/ubshm/shm/shm_mgr.cpp:117
#3 0x0000558a879e925c in brpc::ubring::UBRing::UbrAllocateServerShm
(this=0x7f69ac058900, remote_trx_shm=remote_trx_shm@entry=0x7f68f06f7e40,
local_trx_shm=local_trx_shm@entry=0x7f68f06f7e90) at
/workspace/cgm/brpc/src/brpc/ubshm/ub_ring.cpp:796
#4 0x0000558a879e32e5 in
brpc::ubring::UBShmEndpoint::AllocateServerResources
(this=this@entry=0x7f66c4023a40,
remote_trx_shm=remote_trx_shm@entry=0x7f68f06f7e40,
local_trx_shm=local_trx_shm@entry=0x7f68f06f7e90)
at /workspace/cgm/brpc/src/brpc/ubshm/ub_endpoint.cpp:712
#5 0x0000558a879e3e6b in
brpc::ubring::UBShmEndpoint::ProcessHandshakeAtServer (arg=0x7f66c4023a40)
at /workspace/cgm/brpc/src/brpc/ubshm/ub_endpoint.cpp:548
#6 0x0000558a877d11b7 in bthread::TaskGroup::task_runner
(skip_remained=<optimized out>) at
/workspace/cgm/brpc/src/bthread/task_group.cpp:388
#7 0x0000558a8786d6c1 in bthread_make_fcontext ()
#8 0x0000000000000000 in ?? ()
```
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