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ANDROID: vendor_hooks: Add hooks for futex

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We want to use this hook to record the sleeping time due to Futex

Bug: 210947226
Signed-off-by: Liujie Xie <xieliujie@oppo.com>
Change-Id: I637f889dce42937116d10979e0c40fddf96cd1a2
(cherry picked from commit a7ab784f601a93a78c1c22cd0aacc2af64d8e3c8)
This commit is contained in:
xieliujie 2023-05-10 10:21:56 +08:00 • committed by Carlos Llamas
parent 16f2ad77c7
commit 22fd6b3625
3 changed files with 7 additions and 1 deletions
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1
drivers/android/vendor_hooks.c
View file

@ -175,6 +175,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_wake);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_rwsem_write_finished);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_rwsem_list_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alter_futex_plist_add);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_futex_sleep_start);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_do_futex);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_futex_wait_start);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_futex_wait_end);

3
include/trace/hooks/futex.h
View file

@ -17,6 +17,9 @@ DECLARE_HOOK(android_vh_alter_futex_plist_add,
struct plist_head *head,
bool *already_on_hb),
TP_ARGS(node, head, already_on_hb));
DECLARE_HOOK(android_vh_futex_sleep_start,
TP_PROTO(struct task_struct *p),
TP_ARGS(p));
DECLARE_HOOK(android_vh_do_futex,
TP_PROTO(int cmd,
unsigned int *flags,

4
kernel/futex/waitwake.c
View file

@ -356,8 +356,10 @@ void futex_wait_queue(struct futex_hash_bucket *hb, struct futex_q *q,
* flagged for rescheduling. Only call schedule if there
* is no timeout, or if it has yet to expire.
*/
if (!timeout || timeout->task)
if (!timeout || timeout->task) {
trace_android_vh_futex_sleep_start(current);
schedule();
}
}
__set_current_state(TASK_RUNNING);
}