user版本无法使用logcatd的原因
userdebug软件有如下这些属性,但user版本没有
console:/ # getprop |grep -i logpersistd
[logd.logpersistd]: []
[logd.logpersistd.buffer]: []
[logd.logpersistd.enable]: [true]
[persist.logd.logpersistd]: []
[persist.logd.logpersistd.buffer]: []

\build\target\product\base_system.mk

Packages included only for eng or userdebug builds, previously debug tagged

PRODUCT_PACKAGES_DEBUG :=
adb_keys
arping
dmuserd
idlcli
init-debug.rc
iotop
iperf3
iw
logpersist.start
logtagd.rc
procrank
profcollectd
profcollectctl
remount
servicedispatcher
showmap
sqlite3
ss
start_with_lockagent
strace
su \