zlog加上轮转，在fork多进程情况下运行几千次还是会死锁

[zhouyuyu888]

运行runtime=9420次后：主进程死锁，子进程进入僵尸
root 24349 24170 52 09:23 pts/0 00:04:07 ./taskc
root 25854 24349 0 09:30 pts/0 00:00:00 [taskc]
# strace -p 24349结果如下：
strace: Process 24349 attached
futex(0x7fd20e6195c0, FUTEX_WAIT_PRIVATE, 2, NULL
#pstack 24349结果如下：
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007fd20e00ba24 in pthread_rwlock_rdlock () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S:122
#2 0x00007fd20e412037 in zlog (category=0xa10cd0, file=0x401230 "taskc.c", filelen=7, func=0x401342 <FUNCTION.4306> "do_sig_child", funclen=12, line=39, level=30, format=0x401238 "do_sig_child, pid=%d, tid=%d,sigs=%d\n") at zlog.c:1010
#3 0x0000000000400c4a in do_sig_child ()
#4
#5 pthread_rwlock_unlock () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S:41
#6 0x00007fd20e412071 in zlog (category=0xa10cd0, file=0x401230 "taskc.c", filelen=7, func=0x40134f <FUNCTION.4332> "main", funclen=, line=170, level=30, format=0x401309 "Parent ID %d\n") at zlog.c:1037
#7 0x00000000004010f3 in main ()
gcore 后，用gdb /root/taskc core.24349,where结果如下：
Core was generated by `./taskc'.
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
135 ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S: No such file or directory.
(gdb) where
#0 __lll_lock_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:135
#1 0x00007fd20e00ba24 in pthread_rwlock_rdlock () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_rdlock.S:122
#2 0x00007fd20e412037 in zlog (category=0xa10cd0, file=0x401230 "taskc.c", filelen=7, func=0x401342 <FUNCTION.4306> "do_sig_child", funclen=12, line=39,
level=30, format=0x401238 "do_sig_child, pid=%d, tid=%d,sigs=%d\n") at zlog.c:1010
#3 0x0000000000400c4a in do_sig_child ()
#4
#5 pthread_rwlock_unlock () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_rwlock_unlock.S:41
#6 0x00007fd20e412071 in zlog (category=0xa10cd0, file=0x401230 "taskc.c", filelen=7, func=0x40134f <FUNCTION.4332> "main", funclen=,
line=170, level=30, format=0x401309 "Parent ID %d\n") at zlog.c:1037
#7 0x00000000004010f3 in main ()

[zhouyunbin]

您好，已收到您的来信

[philGemini]

我也发生这个问题了
看了一下代码
似乎是 lock_thread 之后
lock_file 失败就直接返回了
没有解锁导致的
改一下就好

rotater.c 大约 461 行