From 67cf97141d81db41d6e25b0888cf9640e898504b Mon Sep 17 00:00:00 2001 From: Martijn Coenen Date: Mon, 8 May 2017 09:33:22 -0700 Subject: [PATCH] ANDROID: binder: Add tracing for binder priority inheritance. Bug: 34461621 Change-Id: I5ebb1c0c49fd42a89ee250a1d70221f767c82c7c Signed-off-by: Martijn Coenen --- drivers/android/binder.c | 4 ++++ drivers/android/binder_trace.h | 24 ++++++++++++++++++++++++ 2 files changed, 28 insertions(+) diff --git a/drivers/android/binder.c b/drivers/android/binder.c index ec148be388b9..3eda54795da1 100644 --- a/drivers/android/binder.c +++ b/drivers/android/binder.c @@ -1153,6 +1153,10 @@ static void binder_do_set_priority(struct task_struct *task, task->pid, desired.prio, to_kernel_prio(policy, priority)); + trace_binder_set_priority(task->tgid, task->pid, task->normal_prio, + to_kernel_prio(policy, priority), + desired.prio); + /* Set the actual priority */ if (task->policy != policy || is_rt_policy(policy)) { struct sched_param params; diff --git a/drivers/android/binder_trace.h b/drivers/android/binder_trace.h index 76e3b9c8a8a2..b11dffc521e8 100644 --- a/drivers/android/binder_trace.h +++ b/drivers/android/binder_trace.h @@ -85,6 +85,30 @@ DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_ioctl_done); DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_write_done); DEFINE_BINDER_FUNCTION_RETURN_EVENT(binder_read_done); +TRACE_EVENT(binder_set_priority, + TP_PROTO(int proc, int thread, unsigned int old_prio, + unsigned int desired_prio, unsigned int new_prio), + TP_ARGS(proc, thread, old_prio, new_prio, desired_prio), + + TP_STRUCT__entry( + __field(int, proc) + __field(int, thread) + __field(unsigned int, old_prio) + __field(unsigned int, new_prio) + __field(unsigned int, desired_prio) + ), + TP_fast_assign( + __entry->proc = proc; + __entry->thread = thread; + __entry->old_prio = old_prio; + __entry->new_prio = new_prio; + __entry->desired_prio = desired_prio; + ), + TP_printk("proc=%d thread=%d old=%d => new=%d desired=%d", + __entry->proc, __entry->thread, __entry->old_prio, + __entry->new_prio, __entry->desired_prio) +); + TRACE_EVENT(binder_wait_for_work, TP_PROTO(bool proc_work, bool transaction_stack, bool thread_todo), TP_ARGS(proc_work, transaction_stack, thread_todo), -- 2.20.1