tracing: allow select tracepoints on release builds
This primarily affects perfetto's traced_probes and shell-invoked
binaries like atrace, but also anyone with access to "debugfs_tracing".
These tracepoints are being actively collected in internal tracing, so
we would like to also make them available on release builds, as they
should be a source of useful system information there as well.
The ones we definitely need:
* sched_waking, sched_wakeup_new: both are similar to the
already-allowed sched_wakeup. The first differs in which exact process
context it occurs in, and the latter is the wakeup events of only the
fresh tasks.
* oom/mark_victim: contains only the pid of the victim. Useful for
memory-related tracing and analysis.
The other events in this patch are of lesser importance, but also are
fairly straightforward - clocks and priority for frequency/power tracing.
Small extra change: sched_process_free was only relabeled in the tracefs
block, so I've added it to debugfs to keep them in sync. (I wonder whether
debugfs is even necessary at this point... but that's outside of scope
here.)
See the attached bug for a longer explanation. There will also be a
separate patch for system/frameworks/native/atrace/atrace.rc for the
Unix file permissions of these files.
Bug: 179788446
Tested: I did not have access to a "user" build, but I've manually
checked the labels of events/.../enable tracefs files via ls -Z,
and strace'd traced_probes on a hacky debug build where I
commented out its SELinux allow-rule for debugfs_tracing_debug.
Change-Id: I15a9cb33950718757e3ecbd7c71de23b25f85f1d
diff --git a/private/genfs_contexts b/private/genfs_contexts
index d205cd5..92020e1 100644
--- a/private/genfs_contexts
+++ b/private/genfs_contexts
@@ -228,13 +228,18 @@
genfscon tracefs /saved_cmdlines_size u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_switch/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_wakeup/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/sched/sched_wakeup_new/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/sched/sched_waking/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_blocked_reason/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_cpu_hotplug/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_process_exit/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sched/sched_process_free/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/sched/sched_pi_setprio/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/cgroup/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/power/cpu_frequency/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/power/cpu_idle/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/power/clock_enable/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/power/clock_disable/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/power/clock_set_rate/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/power/cpu_frequency_limits/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/power/gpu_frequency/ u:object_r:debugfs_tracing:s0
@@ -250,6 +255,7 @@
genfscon tracefs /events/binder/binder_locked/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/binder/binder_unlock/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/binder/binder_transaction_alloc_buf/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/binder/binder_set_priority/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/lowmemorykiller/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/sync/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/fence/ u:object_r:debugfs_tracing:s0
@@ -262,6 +268,7 @@
genfscon tracefs /events/ion/ion_stat/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/mm_event/mm_event_record/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/oom/oom_score_adj_update/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/oom/mark_victim/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/task/task_rename/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/task/task_newtask/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/ftrace/print/ u:object_r:debugfs_tracing:s0
@@ -272,6 +279,9 @@
genfscon tracefs /events/cpuhp/cpuhp_exit/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/ipi/ u:object_r:debugfs_tracing:s0
genfscon tracefs /events/irq/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/clk/clk_enable/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/clk/clk_disable/ u:object_r:debugfs_tracing:s0
+genfscon tracefs /events/clk/clk_set_rate/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/trace_clock u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/buffer_size_kb u:object_r:debugfs_tracing:s0
@@ -281,12 +291,18 @@
genfscon debugfs /tracing/saved_cmdlines_size u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/sched/sched_switch/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/sched/sched_wakeup/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/sched/sched_wakeup_new/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/sched/sched_waking/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/sched/sched_blocked_reason/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/sched/sched_cpu_hotplug/ u:object_r:debugfs_tracing:s0
-genfscon debugfs /tracing/events/sched/sched_process_exit/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/sched/sched_process_exit/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/sched/sched_process_free/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/sched/sched_pi_setprio/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/cgroup/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/power/cpu_frequency/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/power/cpu_idle/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/power/clock_enable/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/power/clock_disable/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/power/clock_set_rate/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/power/cpu_frequency_limits/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/power/gpu_frequency/ u:object_r:debugfs_tracing:s0
@@ -301,7 +317,8 @@
genfscon debugfs /tracing/events/binder/binder_lock/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/binder/binder_locked/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/binder/binder_unlock/ u:object_r:debugfs_tracing:s0
-genfscon debugfs /tracing/events/binder/binder_transaction_alloc_buf/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/binder/binder_transaction_alloc_buf/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/binder/binder_set_priority/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/lowmemorykiller/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/sync/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/fence/ u:object_r:debugfs_tracing:s0
@@ -314,6 +331,7 @@
genfscon debugfs /tracing/events/ion/ion_stat/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/mm_event/mm_event_record/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/oom/oom_score_adj_update/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/oom/mark_victim/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/task/task_rename/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/task/task_newtask/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/ftrace/print/ u:object_r:debugfs_tracing:s0
@@ -324,6 +342,9 @@
genfscon debugfs /tracing/events/cpuhp/cpuhp_exit/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/ipi/ u:object_r:debugfs_tracing:s0
genfscon debugfs /tracing/events/irq/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/clk/clk_enable/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/clk/clk_disable/ u:object_r:debugfs_tracing:s0
+genfscon debugfs /tracing/events/clk/clk_set_rate/ u:object_r:debugfs_tracing:s0
genfscon debugfs /kcov u:object_r:debugfs_kcov:s0