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>
58 lines
1.1 KiB
C
58 lines
1.1 KiB
C
#undef TRACE_SYSTEM
|
|
#define TRACE_SYSTEM context_tracking
|
|
|
|
#if !defined(_TRACE_CONTEXT_TRACKING_H) || defined(TRACE_HEADER_MULTI_READ)
|
|
#define _TRACE_CONTEXT_TRACKING_H
|
|
|
|
#include <linux/tracepoint.h>
|
|
|
|
DECLARE_EVENT_CLASS(context_tracking_user,
|
|
|
|
TP_PROTO(int dummy),
|
|
|
|
TP_ARGS(dummy),
|
|
|
|
TP_STRUCT__entry(
|
|
__field( int, dummy )
|
|
),
|
|
|
|
TP_fast_assign(
|
|
__entry->dummy = dummy;
|
|
),
|
|
|
|
TP_printk("%s", "")
|
|
);
|
|
|
|
/**
|
|
* user_enter - called when the kernel resumes to userspace
|
|
* @dummy: dummy arg to make trace event macro happy
|
|
*
|
|
* This event occurs when the kernel resumes to userspace after
|
|
* an exception or a syscall.
|
|
*/
|
|
DEFINE_EVENT(context_tracking_user, user_enter,
|
|
|
|
TP_PROTO(int dummy),
|
|
|
|
TP_ARGS(dummy)
|
|
);
|
|
|
|
/**
|
|
* user_exit - called when userspace enters the kernel
|
|
* @dummy: dummy arg to make trace event macro happy
|
|
*
|
|
* This event occurs when userspace enters the kernel through
|
|
* an exception or a syscall.
|
|
*/
|
|
DEFINE_EVENT(context_tracking_user, user_exit,
|
|
|
|
TP_PROTO(int dummy),
|
|
|
|
TP_ARGS(dummy)
|
|
);
|
|
|
|
|
|
#endif /* _TRACE_CONTEXT_TRACKING_H */
|
|
|
|
/* This part must be outside protection */
|
|
#include <trace/define_trace.h>
|