forked from Minki/linux
eef62a6826
There's been a bit confusion to whether DEFINE/DECLARE_TRACE_FMT should be a DEFINE or a DECLARE. Ingo Molnar suggested simply calling it TRACE_FORMAT. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Steven Rostedt <srostedt@redhat.com>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef _LINUX_KERNEL_TRACE_EVENTS_H
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#define _LINUX_KERNEL_TRACE_EVENTS_H
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#include <linux/debugfs.h>
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#include <linux/ftrace.h>
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#include "trace.h"
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struct ftrace_event_call {
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char *name;
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struct dentry *dir;
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int enabled;
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int (*regfunc)(void);
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void (*unregfunc)(void);
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};
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#undef TPFMT
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#define TPFMT(fmt, args...) fmt "\n", ##args
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#undef TRACE_FORMAT
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#define TRACE_FORMAT(call, proto, args, fmt) \
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static void ftrace_event_##call(proto) \
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{ \
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event_trace_printk(_RET_IP_, "(" #call ") " fmt); \
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} \
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\
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static int ftrace_reg_event_##call(void) \
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{ \
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int ret; \
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\
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ret = register_trace_##call(ftrace_event_##call); \
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if (!ret) \
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pr_info("event trace: Could not activate trace point " \
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"probe to " #call); \
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return ret; \
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} \
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\
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static void ftrace_unreg_event_##call(void) \
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{ \
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unregister_trace_##call(ftrace_event_##call); \
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} \
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\
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static struct ftrace_event_call __used \
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__attribute__((__aligned__(4))) \
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__attribute__((section("_ftrace_events"))) event_##call = { \
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.name = #call, \
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.regfunc = ftrace_reg_event_##call, \
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.unregfunc = ftrace_unreg_event_##call, \
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}
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void event_trace_printk(unsigned long ip, const char *fmt, ...);
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extern struct ftrace_event_call __start_ftrace_events[];
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extern struct ftrace_event_call __stop_ftrace_events[];
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#endif /* _LINUX_KERNEL_TRACE_EVENTS_H */
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