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 typedef enum print_line_t (*trace_print_func)(struct trace_iterator *iter,
   8                                               int flags);
   9
  10 struct trace_event {
  11         struct hlist_node       node;
  12         int                     type;
  13         trace_print_func        trace;
  14         trace_print_func        raw;
  15         trace_print_func        hex;
  16         trace_print_func        binary;
  17 };
  18
  19 extern enum print_line_t
  20 trace_print_bprintk_msg_only(struct trace_iterator *iter);
  21 extern enum print_line_t
  22 trace_print_printk_msg_only(struct trace_iterator *iter);
  23
  24 extern int
  25 seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
  26                 unsigned long sym_flags);
  27 extern int seq_print_userip_objs(const struct userstack_entry *entry,
  28                                  struct trace_seq *s, unsigned long sym_flags);
  29 extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
  30                              unsigned long ip, unsigned long sym_flags);
  31
  32 extern int trace_print_context(struct trace_iterator *iter);
  33 extern int trace_print_lat_context(struct trace_iterator *iter);
  34
  35 extern struct trace_event *ftrace_find_event(int type);
  36 extern int register_ftrace_event(struct trace_event *event);
  37 extern int unregister_ftrace_event(struct trace_event *event);
  38
  39 extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
  40                                          int flags);
  41
  42 #define MAX_MEMHEX_BYTES        8
  43 #define HEX_CHARS               (MAX_MEMHEX_BYTES*2 + 1)
  44
  45 #define SEQ_PUT_FIELD_RET(s, x)                         \
  46 do {                                                    \
  47         if (!trace_seq_putmem(s, &(x), sizeof(x)))      \
  48                 return TRACE_TYPE_PARTIAL_LINE;         \
  49 } while (0)
  50
  51 #define SEQ_PUT_HEX_FIELD_RET(s, x)                     \
  52 do {                                                    \
  53         BUILD_BUG_ON(sizeof(x) > MAX_MEMHEX_BYTES);     \
  54         if (!trace_seq_putmem_hex(s, &(x), sizeof(x)))  \
  55                 return TRACE_TYPE_PARTIAL_LINE;         \
  56 } while (0)
  57
  58 #endif
  59