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/mutex.c

@@ -36,6 +36,8 @@
 # include "mutex.h"
 #endif
 
+#include <trace/hooks/dtask.h>
+
 void
 __mutex_init(struct mutex *lock, const char *name, struct lock_class_key *key)
 {
@@ -1002,6 +1004,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 
 	waiter.task = current;
 
+	trace_android_vh_mutex_wait_start(lock);
 	set_current_state(state);
 	for (;;) {
 		/*
@@ -1057,6 +1060,7 @@ __mutex_lock_common(struct mutex *lock, long state, unsigned int subclass,
 	spin_lock(&lock->wait_lock);
 acquired:
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_mutex_wait_finish(lock);
 
 	if (use_ww_ctx && ww_ctx) {
 		/*
@@ -1087,6 +1091,7 @@ skip_wait:
 
 err:
 	__set_current_state(TASK_RUNNING);
+	trace_android_vh_mutex_wait_finish(lock);
 	mutex_remove_waiter(lock, &waiter, current);
 err_early_kill:
 	spin_unlock(&lock->wait_lock);