Root/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
7extern enum print_line_t
8trace_print_bprintk_msg_only(struct trace_iterator *iter);
9extern enum print_line_t
10trace_print_printk_msg_only(struct trace_iterator *iter);
11
12extern int
13seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
14        unsigned long sym_flags);
15extern int seq_print_userip_objs(const struct userstack_entry *entry,
16                 struct trace_seq *s, unsigned long sym_flags);
17extern int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
18                 unsigned long ip, unsigned long sym_flags);
19
20extern int trace_print_context(struct trace_iterator *iter);
21extern int trace_print_lat_context(struct trace_iterator *iter);
22
23extern void trace_event_read_lock(void);
24extern void trace_event_read_unlock(void);
25extern struct trace_event *ftrace_find_event(int type);
26
27extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
28                     int flags, struct trace_event *event);
29extern int
30trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
31
32/* used by module unregistering */
33extern int __unregister_ftrace_event(struct trace_event *event);
34extern 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) \
40do { \
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) \
46do { \
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
54

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