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ANDROID: vendor_hook: add hooks to protect locking-tsk in cpu scheduler

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Providing vendor hooks to record the start time of holding the lock, which
protects rwsem/mutex locking-process from being preemptedfor a short time
in some cases.

- android_vh_record_mutex_lock_starttime
- android_vh_record_rtmutex_lock_starttime
- android_vh_record_rwsem_lock_starttime
- android_vh_record_percpu_rwsem_lock_starttime

Bug: 241191475

Signed-off-by: Peifeng Li <lipeifeng@oppo.com>
Change-Id: I0e967a1e8b77c32a1ad588acd54028fae2f90c4e
This commit is contained in:
Peifeng Li
2022-08-03 19:42:27 +08:00
committed by Matthias Männich
parent fb39cdb9ea
commit eed2741ae6
7 changed files with 76 additions and 7 deletions
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13
include/trace/hooks/dtask.h
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@@ -71,7 +71,18 @@ DECLARE_HOOK(android_vh_mutex_unlock_slowpath_end,
DECLARE_HOOK(android_vh_mutex_start_check_new_owner,
TP_PROTO(struct mutex *lock),
TP_ARGS(lock));
DECLARE_HOOK(android_vh_record_mutex_lock_starttime,
TP_PROTO(struct task_struct *tsk, unsigned long settime_jiffies),
TP_ARGS(tsk, settime_jiffies));
DECLARE_HOOK(android_vh_record_rtmutex_lock_starttime,
TP_PROTO(struct task_struct *tsk, unsigned long settime_jiffies),
TP_ARGS(tsk, settime_jiffies));
DECLARE_HOOK(android_vh_record_rwsem_lock_starttime,
TP_PROTO(struct task_struct *tsk, unsigned long settime_jiffies),
TP_ARGS(tsk, settime_jiffies));
DECLARE_HOOK(android_vh_record_percpu_rwsem_lock_starttime,
TP_PROTO(struct task_struct *tsk, unsigned long settime_jiffies),
TP_ARGS(tsk, settime_jiffies));
/* macro versions of hooks are no longer required */
#endif /* _TRACE_HOOK_DTASK_H */