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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
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12
drivers/android/binder.c
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@@ -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;