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ANDROID: GKI: Add vendor hook to binder transaction

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We want to get binder free space information in the binder
transaction, but this needs to hold the mutex lock. So we add
this restrict hook to do this.

Bug: 205648032
Change-Id: Ie1f377018da686bd62f5ac2d1e5421899741e6d5
Signed-off-by: Liangliang Li <liliangliang@vivo.com>
This commit is contained in:
Liangliang Li 2021-11-10 18:05:13 +08:00 • committed by Todd Kjos
commit 2f3f5731de
3 changed files with 6 additions and 0 deletions
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1
drivers/android/binder.c
View file

@ -2797,6 +2797,7 @@ static void binder_transaction(struct binder_proc *proc,
if (target_thread)
e->to_thread = target_thread->pid;
e->to_proc = target_proc->pid;
trace_android_rvh_binder_transaction(target_proc, proc, thread, tr);
/* TODO: reuse incoming transaction for reply */
t = kzalloc(sizeof(*t), GFP_KERNEL);

1
drivers/android/vendor_hooks.c
View file

@ -289,6 +289,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_timerfd_create);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_alloc_new_buf_locked);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_reply);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_trans);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_binder_transaction);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_preset);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_proc_transaction);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_new_ref);

4
include/trace/hooks/binder.h
View file

@ -52,6 +52,10 @@ DECLARE_HOOK(android_vh_binder_trans,
TP_PROTO(struct binder_proc *target_proc, struct binder_proc *proc,
struct binder_thread *thread, struct binder_transaction_data *tr),
TP_ARGS(target_proc, proc, thread, tr));
DECLARE_RESTRICTED_HOOK(android_rvh_binder_transaction,
TP_PROTO(struct binder_proc *target_proc, struct binder_proc *proc,
struct binder_thread *thread, struct binder_transaction_data *tr),
TP_ARGS(target_proc, proc, thread, tr), 1);
DECLARE_HOOK(android_vh_binder_preset,
TP_PROTO(struct hlist_head *hhead, struct mutex *lock),
TP_ARGS(hhead, lock));