if client is a noblocking socket, user can do close when server has not yet
invoke accept interface, so we need remove this socket from server.lc_waiters.
avoid server socket access the freed memory.
==936564==ERROR: AddressSanitizer: heap-use-after-free on address 0xf23071c8 at pc 0x58eaac3b bp 0xf0b9e218 sp 0xf0b9e208
READ of size 4 at 0xf23071c8 thread T0
#0 0x58eaac3a in dq_remfirst queue/dq_remfirst.c:45
#1 0x58fd1efe in local_accept local/local_accept.c:141
#2 0x58f66df6 in psock_accept socket/accept.c:149
#3 0x58f672a4 in accept4 socket/accept.c:280
#4 0x5be9ee0c in accept net/lib_accept.c:50
#5 0x592d6a5d in uv__accept libuv/src/unix/core.c:502
#6 0x5930d83b in uv__server_io libuv/src/unix/stream.c:550
#7 0x592efbde in uv__io_poll libuv/src/unix/posix-poll.c:335
#8 0x592d649a in uv_run libuv/src/unix/core.c:387
#9 0x5a7180f7 in service_schedule_loop service/common/service_loop.c:146
#10 0x591f300b in pthread_startup pthread/pthread_create.c:59
#11 0x5be8134f in pthread_start pthread/pthread_create.c:139
#12 0x58ee2762 in pre_start sim/sim_initialstate.c:53
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
Add the proccessing logic of udp socketpair, and modify the
logic of sending and receiving for udp socketpair.
Verification:
- Use the socketpair interface to create a pair of local udp sockets,
and perform read and write operations.
Signed-off-by: liqinhui <liqinhui@xiaomi.com>
sched/semaphore: Add nxsem_post() which is identical to sem_post() except that it never modifies the errno variable. Changed all references to sem_post in the OS to nxsem_post().
sched/semaphore: Add nxsem_destroy() which is identical to sem_destroy() except that it never modifies the errno variable. Changed all references to sem_destroy() in the OS to nxsem_destroy().
libc/semaphore and sched/semaphore: Add nxsem_getprotocol() and nxsem_setprotocola which are identical to sem_getprotocol() and set_setprotocol() except that they never modifies the errno variable. Changed all references to sem_setprotocol in the OS to nxsem_setprotocol(). sem_getprotocol() was not used in the OS
