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Commit a4feb834 authored by Ingo Molnar's avatar Ingo Molnar Committed by Thomas Gleixner
Browse files

ftrace: special stacktrace 



Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 9fe068e9

kernel/trace/trace.c

+24 −23
Original line number Diff line number Diff line
@@ -808,29 +808,6 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, 
		trace_function(tr, data, ip, parent_ip, flags);

}



void

__trace_special(void *__tr, void *__data,

		unsigned long arg1, unsigned long arg2, unsigned long arg3)

{

	struct trace_array_cpu *data = __data;

	struct trace_array *tr = __tr;

	struct trace_entry *entry;

	unsigned long irq_flags;



	raw_local_irq_save(irq_flags);

	__raw_spin_lock(&data->lock);

	entry			= tracing_get_trace_entry(tr, data);

	tracing_generic_entry_update(entry, 0);

	entry->type		= TRACE_SPECIAL;

	entry->special.arg1	= arg1;

	entry->special.arg2	= arg2;

	entry->special.arg3	= arg3;

	__raw_spin_unlock(&data->lock);

	raw_local_irq_restore(irq_flags);



	trace_wake_up();

}



void __trace_stack(struct trace_array *tr,

		   struct trace_array_cpu *data,

		   unsigned long flags,
@@ -856,6 +833,30 @@ void __trace_stack(struct trace_array *tr, 
	save_stack_trace(&trace);

}



void

__trace_special(void *__tr, void *__data,

		unsigned long arg1, unsigned long arg2, unsigned long arg3)

{

	struct trace_array_cpu *data = __data;

	struct trace_array *tr = __tr;

	struct trace_entry *entry;

	unsigned long irq_flags;



	raw_local_irq_save(irq_flags);

	__raw_spin_lock(&data->lock);

	entry			= tracing_get_trace_entry(tr, data);

	tracing_generic_entry_update(entry, 0);

	entry->type		= TRACE_SPECIAL;

	entry->special.arg1	= arg1;

	entry->special.arg2	= arg2;

	entry->special.arg3	= arg3;

	__trace_stack(tr, data, irq_flags, 4);

	__raw_spin_unlock(&data->lock);

	raw_local_irq_restore(irq_flags);



	trace_wake_up();

}



void

tracing_sched_switch_trace(struct trace_array *tr,

			   struct trace_array_cpu *data,