Binder杂记

1. Binder的系统日志文件

# ps -A | grep suspend
system          699      1 2184444   4564 binder_ioctl_write_read 0 S android.system.suspend@1.0-service
# ls /proc/699/fd -l
...
lrwx------ 1 system system 64 2021-04-17 15:58 7 -> /dev/binderfs/hwbinder
lrwx------ 1 system system 64 2021-04-17 15:58 8 -> /dev/binderfs/binder
...
# cd /dev/binderfs/
/dev/binderfs # ls -l
crw-rw-rw- 1 root root 487,   1 1970-04-23 22:13 binder
crw------- 1 root root 487,   0 1970-04-23 22:13 binder-control
drwxr-xr-x 3 root root        0 1970-04-23 22:13 binder_logs
crw-rw-rw- 1 root root 487,   2 1970-04-23 22:13 hwbinder
crw-rw-rw- 1 root root 487,   3 1970-04-23 22:13 vndbinder
/dev/binderfs # cd binder_logs
/dev/binderfs/binder_logs # ls -l
-r--r--r-- 1 root root 0 1970-04-23 22:13 failed_transaction_log
drwxr-xr-x 2 root root 0 2021-04-17 16:02 proc
-r--r--r-- 1 root root 0 1970-04-23 22:13 state
-r--r--r-- 1 root root 0 1970-04-23 22:13 stats
-r--r--r-- 1 root root 0 1970-04-23 22:13 transaction_log
-r--r--r-- 1 root root 0 1970-04-23 22:13 transactions