You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.7 KiB
73 lines
2.7 KiB
# Performance profiler, backed by perf_event_open(2).
|
|
# See go/perfetto-perf-android.
|
|
typeattribute traced_perf coredomain;
|
|
typeattribute traced_perf mlstrustedsubject;
|
|
|
|
type traced_perf_exec, system_file_type, exec_type, file_type;
|
|
|
|
init_daemon_domain(traced_perf)
|
|
perfetto_producer(traced_perf)
|
|
|
|
# Allow traced_perf full use of perf_event_open(2). It will perform cpu-wide
|
|
# profiling, but retain samples only for profileable processes.
|
|
# Thread-specific profiling is still disallowed due to a PTRACE_MODE_ATTACH
|
|
# check (which would require a process:attach SELinux allow-rule).
|
|
allow traced_perf self:perf_event { open cpu kernel read write tracepoint };
|
|
|
|
# Allow CAP_KILL for delivery of dedicated signal to obtain proc-fds from a
|
|
# process. Allow CAP_DAC_READ_SEARCH for stack unwinding and symbolization of
|
|
# sampled stacks, which requires opening the backing libraries/executables (as
|
|
# symbols are usually not mapped into the process space). Not all such files
|
|
# are world-readable, e.g. odex files that included user profiles during
|
|
# profile-guided optimization.
|
|
allow traced_perf self:capability { kill dac_read_search };
|
|
|
|
# Allow reading /system/data/packages.list.
|
|
allow traced_perf packages_list_file:file r_file_perms;
|
|
|
|
# Allow reading files for stack unwinding and symbolization.
|
|
r_dir_file(traced_perf, nativetest_data_file)
|
|
r_dir_file(traced_perf, system_file_type)
|
|
r_dir_file(traced_perf, apex_art_data_file)
|
|
r_dir_file(traced_perf, apk_data_file)
|
|
r_dir_file(traced_perf, dalvikcache_data_file)
|
|
r_dir_file(traced_perf, vendor_file_type)
|
|
|
|
# Allow to temporarily lift the kptr_restrict setting and build a symbolization
|
|
# map reading /proc/kallsyms.
|
|
userdebug_or_eng(`set_prop(traced_perf, lower_kptr_restrict_prop)')
|
|
allow traced_perf proc_kallsyms:file r_file_perms;
|
|
|
|
# Allow reading tracefs files to get the format and numeric ids of tracepoints.
|
|
allow traced_perf debugfs_tracing:dir r_dir_perms;
|
|
allow traced_perf debugfs_tracing:file r_file_perms;
|
|
userdebug_or_eng(`
|
|
allow traced_perf debugfs_tracing_debug:dir r_dir_perms;
|
|
allow traced_perf debugfs_tracing_debug:file r_file_perms;
|
|
')
|
|
|
|
# Do not audit the cases where traced_perf attempts to access /proc/[pid] for
|
|
# domains that it cannot read.
|
|
dontaudit traced_perf domain:dir { search getattr open };
|
|
|
|
# Do not audit failures to signal a process, as there are cases when this is
|
|
# expected (native processes on debug builds use the policy for enforcing which
|
|
# processes are profileable).
|
|
dontaudit traced_perf domain:process signal;
|
|
|
|
# Never allow access to app data files
|
|
neverallow traced_perf { app_data_file privapp_data_file system_app_data_file }:file *;
|
|
|
|
# Never allow profiling highly privileged processes.
|
|
never_profile_perf(`{
|
|
bpfloader
|
|
init
|
|
kernel
|
|
keystore
|
|
llkd
|
|
logd
|
|
ueventd
|
|
vendor_init
|
|
vold
|
|
}')
|