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