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ftrace: add trace_special()

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for ad-hoc tracing.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar
2008-05-12 21:20:47 +02:00
committed by Thomas Gleixner
parent cb0f12aae8
commit f0a920d575
2 changed files with 59 additions and 0 deletions
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15
kernel/trace/trace.h
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@@ -25,6 +25,15 @@ struct ctx_switch_entry {
unsigned char next_prio;
};
/*
* Special (free-form) trace entry:
*/
struct special_entry {
unsigned long arg1;
unsigned long arg2;
unsigned long arg3;
};
/*
* The trace entry - the most basic unit of tracing. This is what
* is printed in the end as a single line in the trace output, such as:
@@ -41,6 +50,7 @@ struct trace_entry {
union {
struct ftrace_entry fn;
struct ctx_switch_entry ctx;
struct special_entry special;
};
};
@@ -154,6 +164,11 @@ void tracing_sched_switch_trace(struct trace_array *tr,
struct task_struct *next,
unsigned long flags);
void tracing_record_cmdline(struct task_struct *tsk);
void trace_special(struct trace_array *tr,
struct trace_array_cpu *data,
unsigned long arg1,
unsigned long arg2,
unsigned long arg3);
void tracing_start_function_trace(void);
void tracing_stop_function_trace(void);