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ANDROID: vendor_hooks: Add hooks for binder

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trace_android_vh_binder_proc_transaction_entry:
We need change binder thread so that this work can be added in
proc->todo, if we found the binder thread, skip native logic.

trace_android_vh_binder_select_worklist_ilocked:
we need this because we can't change list point in ”trace_android_vh_binder_thread_read“,
otherwise, If a work has beed added in our own defined list before,
current may goto retry and loop again and again.

Bug: 219898723
Change-Id: Ifdb3429c9ddac521bc75c1d21740ee7cc4b8f143
Signed-off-by: Liujie Xie <xieliujie@oppo.com>
This commit is contained in:
Liujie Xie
2022-02-20 16:53:05 +08:00
parent c3ac7418e6
commit acefa91e51
3 changed files with 21 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/android/binder.c
View File

@@ -2490,6 +2490,7 @@ static int binder_proc_transaction(struct binder_transaction *t,
struct binder_priority node_prio;
bool oneway = !!(t->flags & TF_ONE_WAY);
bool pending_async = false;
bool skip = false;
BUG_ON(!node);
binder_node_lock(node);
@@ -2517,7 +2518,10 @@ static int binder_proc_transaction(struct binder_transaction *t,
return proc->is_frozen ? BR_FROZEN_REPLY : BR_DEAD_REPLY;
}
if (!thread && !pending_async)
trace_android_vh_binder_proc_transaction_entry(proc, t,
&thread, node->debug_id, pending_async, !oneway, &skip);
if (!thread && !pending_async && !skip)
thread = binder_select_thread_ilocked(proc);
trace_android_vh_binder_proc_transaction(current, proc->tsk,
@@ -4032,6 +4036,10 @@ retry:
size_t trsize = sizeof(*trd);
binder_inner_proc_lock(proc);
trace_android_vh_binder_select_worklist_ilocked(&list, thread,
proc, wait_for_proc_work);
if (list)
goto skip;
if (!binder_worklist_empty_ilocked(&thread->todo))
list = &thread->todo;
else if (!binder_worklist_empty_ilocked(&proc->todo) &&
@@ -4045,7 +4053,7 @@ retry:
goto retry;
break;
}
skip:
if (end - ptr < sizeof(tr) + 4) {
binder_inner_proc_unlock(proc);
break;

2
drivers/android/vendor_hooks.c
View File

@@ -277,8 +277,10 @@ 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_entry);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_proc_transaction);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_proc_transaction_end);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_select_worklist_ilocked);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_new_ref);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_del_ref);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_rvh_post_init_entity_util_avg);

9
include/trace/hooks/binder.h
View File

@@ -59,6 +59,11 @@ DECLARE_RESTRICTED_HOOK(android_rvh_binder_transaction,
DECLARE_HOOK(android_vh_binder_preset,
TP_PROTO(struct hlist_head *hhead, struct mutex *lock),
TP_ARGS(hhead, lock));
DECLARE_HOOK(android_vh_binder_proc_transaction_entry,
TP_PROTO(struct binder_proc *proc, struct binder_transaction *t,
struct binder_thread **thread, int node_debug_id, bool pending_async,
bool sync, bool *skip),
TP_ARGS(proc, t, thread, node_debug_id, pending_async, sync, skip));
DECLARE_HOOK(android_vh_binder_proc_transaction,
TP_PROTO(struct task_struct *caller_task, struct task_struct *binder_proc_task,
struct task_struct *binder_th_task, int node_debug_id,
@@ -69,6 +74,10 @@ DECLARE_HOOK(android_vh_binder_proc_transaction_end,
struct task_struct *binder_th_task, unsigned int code,
bool pending_async, bool sync),
TP_ARGS(caller_task, binder_proc_task, binder_th_task, code, pending_async, sync));
DECLARE_HOOK(android_vh_binder_select_worklist_ilocked,
TP_PROTO(struct list_head **list, struct binder_thread *thread, struct binder_proc *proc,
int wait_for_proc_work),
TP_ARGS(list, thread, proc, wait_for_proc_work));
DECLARE_HOOK(android_vh_binder_new_ref,
TP_PROTO(struct task_struct *proc, uint32_t ref_desc, int node_debug_id),
TP_ARGS(proc, ref_desc, node_debug_id));