forked from luck/tmp_suning_uos_patched
1b6a259aa5
This can be useful to track all kernel/user round trips. And it's also helpful to debug the context tracking subsystem. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Kevin Hilman <khilman@linaro.org>
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM context_tracking
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#if !defined(_TRACE_CONTEXT_TRACKING_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_CONTEXT_TRACKING_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(context_tracking_user,
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TP_PROTO(int dummy),
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TP_ARGS(dummy),
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TP_STRUCT__entry(
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__field( int, dummy )
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),
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TP_fast_assign(
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__entry->dummy = dummy;
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),
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TP_printk("%s", "")
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);
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/**
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* user_enter - called when the kernel resumes to userspace
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* @dummy: dummy arg to make trace event macro happy
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*
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* This event occurs when the kernel resumes to userspace after
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* an exception or a syscall.
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*/
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DEFINE_EVENT(context_tracking_user, user_enter,
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TP_PROTO(int dummy),
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TP_ARGS(dummy)
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);
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/**
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* user_exit - called when userspace enters the kernel
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* @dummy: dummy arg to make trace event macro happy
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*
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* This event occurs when userspace enters the kernel through
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* an exception or a syscall.
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*/
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DEFINE_EVENT(context_tracking_user, user_exit,
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TP_PROTO(int dummy),
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TP_ARGS(dummy)
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);
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#endif /* _TRACE_CONTEXT_TRACKING_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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