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ANDROID: vendor_hooks: Add hooks for binder proc transaction

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When servicemanager process added service proxy from other process
register the service, we want to know the matching relation between
handle in the process and service name. When binder transaction
happened, We want to know what process calls what method on what service.

Bug: 186604985

Signed-off-by: zhengding chen <chenzhengding@oppo.com>
Change-Id: I813d1cde10294d8665f899f7fef0d444ec1f1f5e
This commit is contained in:
zhengding chen 2021-04-28 19:24:57 +08:00 • committed by Todd Kjos
commit 35014985c2
3 changed files with 19 additions and 0 deletions
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5
drivers/android/binder.c
View file

@ -1202,6 +1202,7 @@ static struct binder_ref *binder_get_ref_for_node_olocked(
"%d new ref %d desc %d for node %d\n",
proc->pid, new_ref->data.debug_id, new_ref->data.desc,
node->debug_id);
trace_android_vh_binder_new_ref(proc->tsk, new_ref->data.desc, new_ref->node->debug_id);
binder_node_unlock(node);
return new_ref;
}
@ -1369,6 +1370,7 @@ err_no_ref:
*/
static void binder_free_ref(struct binder_ref *ref)
{
trace_android_vh_binder_del_ref(ref->proc ? ref->proc->tsk : 0, ref->data.desc);
if (ref->node)
binder_free_node(ref->node);
kfree(ref->death);
@ -2502,6 +2504,9 @@ static int binder_proc_transaction(struct binder_transaction *t,
if (!thread && !pending_async)
thread = binder_select_thread_ilocked(proc);
trace_android_vh_binder_proc_transaction(current, proc->tsk,
thread ? thread->task : 0, node->debug_id, t->code, pending_async);
if (thread) {
binder_transaction_priority(thread->task, t, node_prio,
node->inherit_rt);

3
drivers/android/vendor_hooks.c
View file

@ -240,6 +240,9 @@ 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_vh_binder_preset);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_proc_transaction);
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);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_typec_tcpm_get_timer);
EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_typec_tcpm_adj_current_limit);

11
include/trace/hooks/binder.h
View file

@ -54,6 +54,17 @@ DECLARE_HOOK(android_vh_binder_trans,
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,
TP_PROTO(struct task_struct *caller_task, struct task_struct *binder_proc_task,
struct task_struct *binder_th_task, int node_debug_id,
unsigned int code, bool pending_async),
TP_ARGS(caller_task, binder_proc_task, binder_th_task, node_debug_id, code, pending_async));
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));
DECLARE_HOOK(android_vh_binder_del_ref,
TP_PROTO(struct task_struct *proc, uint32_t ref_desc),
TP_ARGS(proc, ref_desc));
/* macro versions of hooks are no longer required */