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
  30 /* used by module unregistering */
  31 extern int __unregister_ftrace_event(struct trace_event *event);
  32 extern struct rw_semaphore trace_event_mutex;
  33
  34 #define MAX_MEMHEX_BYTES        8
  35 #define HEX_CHARS               (MAX_MEMHEX_BYTES*2 + 1)
  36
  37 #define SEQ_PUT_FIELD_RET(s, x)                         \
  38 do {                                                    \
  39         if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
  40                 return TRACE_TYPE_PARTIAL_LINE;         \
  41 } while (0)
  42
  43 #define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
  44 do {                                                    \
  45         BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
  46         if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
  47                 return TRACE_TYPE_PARTIAL_LINE;         \
  48 } while (0)
  49
  50 #endif
  51