LXR linux/kernel/trace/trace

   1#ifndef __TRACE_EVENTS_H
   2#define __TRACE_EVENTS_H
   3
   4#include <linux/trace_seq.h>
   5#include "trace.h"
   6
   7extern enum print_line_t
   8trace_print_bputs_msg_only(struct trace_iterator *iter);
   9extern enum print_line_t
  10trace_print_bprintk_msg_only(struct trace_iterator *iter);
  11extern enum print_line_t
  12trace_print_printk_msg_only(struct trace_iterator *iter);
  13
  14extern int
  15seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
  16                unsigned long sym_flags);
  17extern int seq_print_userip_objs(const struct userstack_entry *entry,
  18                                 struct trace_seq *s, unsigned long sym_flags);
  19extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
  20                             unsigned long ip, unsigned long sym_flags);
  21
  22extern int trace_print_context(struct trace_iterator *iter);
  23extern int trace_print_lat_context(struct trace_iterator *iter);
  24
  25extern void trace_event_read_lock(void);
  26extern void trace_event_read_unlock(void);
  27extern struct trace_event *ftrace_find_event(int type);
  28
  29extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
  30                                         int flags, struct trace_event *event);
  31extern int
  32trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
  33
  34/* used by module unregistering */
  35extern int __unregister_ftrace_event(struct trace_event *event);
  36extern 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)                         \
  42do {                                                    \
  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)                     \
  48do {                                                    \
  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
  56