git.oblomov.eu Git - linux-2.6/blob - kernel/trace/trace_events.h

   1 #ifndef _LINUX_KERNEL_TRACE_EVENTS_H
   2 #define _LINUX_KERNEL_TRACE_EVENTS_H
   3
   4 #include <linux/debugfs.h>
   5 #include <linux/ftrace.h>
   6 #include "trace.h"
   7
   8 struct ftrace_event_call {
   9         char            *name;
  10         struct dentry   *dir;
  11         int             enabled;
  12         int             (*regfunc)(void);
  13         void            (*unregfunc)(void);
  14 };
  15
  16
  17 #undef TPFMT
  18 #define TPFMT(fmt, args...)     fmt "\n", ##args
  19
  20 #undef TRACE_FORMAT
  21 #define TRACE_FORMAT(call, proto, args, fmt)                            \
  22 static void ftrace_event_##call(proto)                                  \
  23 {                                                                       \
  24         event_trace_printk(_RET_IP_, "(" #call ") " fmt);               \
  25 }                                                                       \
  26                                                                         \
  27 static int ftrace_reg_event_##call(void)                                \
  28 {                                                                       \
  29         int ret;                                                        \
  30                                                                         \
  31         ret = register_trace_##call(ftrace_event_##call);               \
  32         if (!ret)                                                       \
  33                 pr_info("event trace: Could not activate trace point "  \
  34                         "probe to " #call);                             \
  35         return ret;                                                     \
  36 }                                                                       \
  37                                                                         \
  38 static void ftrace_unreg_event_##call(void)                             \
  39 {                                                                       \
  40         unregister_trace_##call(ftrace_event_##call);                   \
  41 }                                                                       \
  42                                                                         \
  43 static struct ftrace_event_call __used                                  \
  44 __attribute__((__aligned__(4)))                                         \
  45 __attribute__((section("_ftrace_events"))) event_##call = {             \
  46         .name                   = #call,                                \
  47         .regfunc                = ftrace_reg_event_##call,              \
  48         .unregfunc              = ftrace_unreg_event_##call,            \
  49 }
  50
  51 void event_trace_printk(unsigned long ip, const char *fmt, ...);
  52 extern struct ftrace_event_call __start_ftrace_events[];
  53 extern struct ftrace_event_call __stop_ftrace_events[];
  54
  55 #endif /* _LINUX_KERNEL_TRACE_EVENTS_H */