kernel/trace/trace_output.h

   1 #ifndef __TRACE_EVENTS_H
   2 #define __TRACE_EVENTS_H
   3
   4 #include <linux/trace_seq.h>
   5 #include "trace.h"
   6
   7 extern enum print_line_t
   8 trace_print_bputs_msg_only(struct trace_iterator *iter);
   9 extern enum print_line_t
  10 trace_print_bprintk_msg_only(struct trace_iterator *iter);
  11 extern enum print_line_t
  12 trace_print_printk_msg_only(struct trace_iterator *iter);
  13
  14 extern int
  15 seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
  16                 unsigned long sym_flags);
  17 extern int seq_print_userip_objs(const struct userstack_entry *entry,
  18                                  struct trace_seq *s, unsigned long sym_flags);
  19 extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
  20                              unsigned long ip, unsigned long sym_flags);
  21
  22 extern int trace_print_context(struct trace_iterator *iter);
  23 extern int trace_print_lat_context(struct trace_iterator *iter);
  24
  25 extern void trace_event_read_lock(void);
  26 extern void trace_event_read_unlock(void);
  27 extern struct trace_event *ftrace_find_event(int type);
  28
  29 extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
  30                                          int flags, struct trace_event *event);
  31 extern int
  32 trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
  33
  34 /* used by module unregistering */
  35 extern int __unregister_ftrace_event(struct trace_event *event);
  36 extern struct rw_semaphore trace_event_sem;
  37
  38 #define MAX_MEMHEX_BYTES        8
  39 #define HEX_CHARS               (MAX_MEMHEX_BYTES*2 + 1)
  40
  41 #define SEQ_PUT_FIELD_RET(s, x)                         \
  42 do {                                                    \
  43         if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
  44                 return TRACE_TYPE_PARTIAL_LINE;         \
  45 } while (0)
  46
  47 #define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
  48 do {                                                    \
  49         BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
  50         if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
  51                 return TRACE_TYPE_PARTIAL_LINE;         \
  52 } while (0)
  53
  54 #endif
  55