blob: 1835466b0543e49912792931fd427004018eb789 [file] [log] [blame]
Ryan Savitski29082bf2020-02-12 15:13:51 +00001# Copyright (C) 2020 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7# http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
Ryan87227fa2020-03-24 16:16:30 +000015# Notes:
16# * socket used for receiving /proc/pid/{maps,mem} file descriptors
17# * readproc group to stat(/proc/pid) to find out UID of processes, and read
18# /proc/pid/cmdline.
19# * KILL capability for sending BIONIC_SIGNAL_PROFILER.
20# * DAC_READ_SEARCH capability for stack unwinding and on-device symbolization (requires
21# opening libraries/executables for sections not already mapped in).
22# * foreground task group as unwinding based on minidebug info is a heavyweight action.
Ryan Savitski29082bf2020-02-12 15:13:51 +000023service traced_perf /system/bin/traced_perf
24 class late_start
Ryan Savitskibea646e2020-03-26 21:02:03 +000025 disabled
Ryan Savitski29082bf2020-02-12 15:13:51 +000026 socket traced_perf stream 0666 root root
27 user nobody
Ryan Savitski29082bf2020-02-12 15:13:51 +000028 group nobody readproc
Ryan Savitski29082bf2020-02-12 15:13:51 +000029 capabilities KILL DAC_READ_SEARCH
Suren Baghdasaryana08f53b2021-06-17 18:48:43 -070030 task_profiles ProcessCapacityHigh
Ryan Savitski29082bf2020-02-12 15:13:51 +000031
Ryan87227fa2020-03-24 16:16:30 +000032# Daemon run state:
Ryan Savitskibea646e2020-03-26 21:02:03 +000033# * initially off
Ryan87227fa2020-03-24 16:16:30 +000034# * |persist.traced_perf.enable| forces daemon to run unconditionally
35# * if kernel doesn't have perf_event_open LSM hooks, daemon is stopped
36# * otherwise, follow |traced.lazy.traced_perf| as an on-demand service
Ryan Savitski29082bf2020-02-12 15:13:51 +000037on property:persist.traced_perf.enable=1
38 start traced_perf
Ryan Savitskibea646e2020-03-26 21:02:03 +000039on property:persist.traced_perf.enable="" && property:sys.init.perf_lsm_hooks=""
Ryan87227fa2020-03-24 16:16:30 +000040 stop traced_perf
Ryan Savitskibea646e2020-03-26 21:02:03 +000041on property:persist.traced_perf.enable="" && property:sys.init.perf_lsm_hooks=1 && property:traced.lazy.traced_perf=1
Ryan87227fa2020-03-24 16:16:30 +000042 start traced_perf
Ryan Savitskibea646e2020-03-26 21:02:03 +000043on property:persist.traced_perf.enable="" && property:sys.init.perf_lsm_hooks=1 && property:traced.lazy.traced_perf=""
Ryan Savitski29082bf2020-02-12 15:13:51 +000044 stop traced_perf
45
Ryan Savitskibea646e2020-03-26 21:02:03 +000046on property:persist.traced_perf.enable=0
47 setprop persist.traced_perf.enable ""