platform_system_sepolicy/private/runas_app.te

typeattribute runas_app coredomain;

app_domain(runas_app)
untrusted_app_domain(runas_app)
net_domain(runas_app)
bluetooth_domain(runas_app)

# The ability to call exec() on files in the apps home directories
# when using run-as on a debuggable app. Used to run lldb/ndk-gdb/simpleperf,
# which are copied to the apps home directories.
allow runas_app app_data_file:file execute_no_trans;

# Allow lldb/ndk-gdb/simpleperf to read maps of debuggable app processes.
r_dir_file(runas_app, untrusted_app_all)

# Allow lldb/ndk-gdb/simpleperf to ptrace attach to debuggable app processes.
allow runas_app untrusted_app_all:process { ptrace sigkill signal sigstop };
allow runas_app untrusted_app_all:unix_stream_socket connectto;

# Allow executing system image simpleperf without a domain transition.
allow runas_app simpleperf_exec:file rx_file_perms;

# Suppress denial logspam when simpleperf is trying to find a matching process
# by scanning /proc/<pid>/cmdline files. The /proc/<pid> directories are within
# the same domain as their respective process, most of which this domain is not
# allowed to see.
dontaudit runas_app domain:dir search;

# Allow runas_app to call perf_event_open for profiling debuggable app
# processes, but not the whole system.
allow runas_app self:perf_event { open read write kernel };
neverallow runas_app self:perf_event ~{ open read write kernel };