ANDROID: vendor_hooks: add waiting information for blocked tasks

- Add the hook to get mutex/rwsem information that the tasks
   are waiting for.

 - Add the hook to print messages for sched_show_task.

 - ANDROID_VENDOR_DATA_ARRAY added to task_struct

Bug: 162776704

Signed-off-by: Sangmoon Kim <sangmoon.kim@samsung.com>
Change-Id: Ib436fbd8d0ad509c3b5a73ea8f5170e0761a13fd
(cherry picked from commit b519ac4237)

kernel/locking/rwsem.c

@@ -30,6 +30,7 @@
 
 #include "lock_events.h"
 #include <trace/hooks/rwsem.h>
+#include <trace/hooks/dtask.h>
 
 /*
  * The least significant 3 bits of the owner value has the following
@@ -1090,6 +1091,7 @@ queue:
 	wake_up_q(&wake_q);
 
 	/* wait to be given the lock */
+	trace_android_vh_rwsem_read_wait_start(sem);
 	for (;;) {
 		set_current_state(state);
 		if (!smp_load_acquire(&waiter.task)) {
@@ -1109,6 +1111,7 @@ queue:
 	}
 
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_rwsem_read_wait_finish(sem);
 	lockevent_inc(rwsem_rlock);
 	return sem;
 
@@ -1120,6 +1123,7 @@ out_nolock:
 	}
 	raw_spin_unlock_irq(&sem->wait_lock);
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_rwsem_read_wait_finish(sem);
 	lockevent_inc(rwsem_rlock_fail);
 	return ERR_PTR(-EINTR);
 }
@@ -1220,6 +1224,7 @@ rwsem_down_write_slowpath(struct rw_semaphore *sem, int state)
 wait:
 	trace_android_vh_rwsem_wake(sem);
 	/* wait until we successfully acquire the lock */
+	trace_android_vh_rwsem_write_wait_start(sem);
 	set_current_state(state);
 	for (;;) {
 		if (rwsem_try_write_lock(sem, wstate)) {
@@ -1279,6 +1284,7 @@ trylock_again:
 		raw_spin_lock_irq(&sem->wait_lock);
 	}
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_rwsem_write_wait_finish(sem);
 	list_del(&waiter.list);
 	rwsem_disable_reader_optspin(sem, disable_rspin);
 	raw_spin_unlock_irq(&sem->wait_lock);
@@ -1288,6 +1294,7 @@ trylock_again:
 
 out_nolock:
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_rwsem_write_wait_finish(sem);
 	raw_spin_lock_irq(&sem->wait_lock);
 	list_del(&waiter.list);