1# Domain used when running /system/bin/simpleperf to profile a specific app. 2# Entered either by the app itself exec-ing the binary, or through 3# simpleperf_app_runner (with shell as its origin). Certain other domains 4# (runas_app, shell) can also exec this binary without a domain transition. 5typeattribute simpleperf coredomain; 6type simpleperf_exec, system_file_type, exec_type, file_type; 7 8# Define apps that can be marked debuggable/profileable and be profiled by simpleperf. 9define(`simpleperf_profileable_apps', `{ 10 ephemeral_app 11 isolated_app 12 platform_app 13 priv_app 14 untrusted_app_all 15}') 16 17domain_auto_trans({ simpleperf_profileable_apps -runas_app }, simpleperf_exec, simpleperf) 18 19# When running in this domain, simpleperf is scoped to profiling an individual 20# app. The necessary MAC permissions for profiling are more maintainable and 21# consistent if simpleperf is marked as an app domain as well (as, for example, 22# it will then see the same set of system libraries as the app). 23app_domain(simpleperf) 24untrusted_app_domain(simpleperf) 25 26# Allow ptrace attach to the target app, for reading JIT debug info (using 27# process_vm_readv) during unwinding and symbolization. 28allow simpleperf simpleperf_profileable_apps:process ptrace; 29 30# Allow using perf_event_open syscall for profiling the target app. 31allow simpleperf self:perf_event { open read write kernel }; 32 33# Allow /proc/<pid> access for the target app (for example, when trying to 34# discover it by cmdline). 35r_dir_file(simpleperf, simpleperf_profileable_apps) 36 37# Allow apps signalling simpleperf domain, which is the domain that the simpleperf 38# profiler runs as when executed by the app. The signals are used to control 39# the profiler (which would be profiling the app that is sending the signal). 40allow simpleperf_profileable_apps simpleperf:process signal; 41 42# Suppress denial logspam when simpleperf is trying to find a matching process 43# by scanning /proc/<pid>/cmdline files. The /proc/<pid> directories are within 44# the same domain as their respective processes, most of which this domain is 45# not allowed to see. 46dontaudit simpleperf domain:dir search; 47 48# Neverallows: 49 50# Profiling must be confined to the scope of an individual app. 51neverallow simpleperf self:perf_event ~{ open read write kernel }; 52