trace_output.h

 1// SPDX-License-Identifier: GPL-2.0
 2#ifndef __TRACE_EVENTS_H
 3#define __TRACE_EVENTS_H
 4
 5#include <linux/trace_seq.h>
 6#include "trace.h"
 7
 8extern enum print_line_t
 9trace_print_bputs_msg_only(struct trace_iterator *iter);
10extern enum print_line_t
11trace_print_bprintk_msg_only(struct trace_iterator *iter);
12extern enum print_line_t
13trace_print_printk_msg_only(struct trace_iterator *iter);
14
15extern int
16seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
17		unsigned long sym_flags);
18
19static inline int seq_print_ip_sym_offset(struct trace_seq *s, unsigned long ip,
20					   unsigned long sym_flags)
21{
22	return seq_print_ip_sym(s, ip, sym_flags | TRACE_ITER(SYM_OFFSET));
23}
24static inline int seq_print_ip_sym_no_offset(struct trace_seq *s, unsigned long ip,
25					   unsigned long sym_flags)
26{
27	return seq_print_ip_sym(s, ip, sym_flags & ~TRACE_ITER(SYM_OFFSET));
28}
29
30extern void trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset);
31extern int trace_print_context(struct trace_iterator *iter);
32extern int trace_print_lat_context(struct trace_iterator *iter);
33extern enum print_line_t print_event_fields(struct trace_iterator *iter,
34					    struct trace_event *event);
35
36extern void trace_event_read_lock(void);
37extern void trace_event_read_unlock(void);
38extern struct trace_event *ftrace_find_event(int type);
39
40extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
41					 int flags, struct trace_event *event);
42extern int
43trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
44
45/* used by module unregistering */
46extern int __unregister_trace_event(struct trace_event *event);
47extern struct rw_semaphore trace_event_sem;
48
49#define SEQ_PUT_FIELD(s, x)				\
50	trace_seq_putmem(s, &(x), sizeof(x))
51
52#define SEQ_PUT_HEX_FIELD(s, x)				\
53	trace_seq_putmem_hex(s, &(x), sizeof(x))
54
55#ifdef CONFIG_FUNCTION_TRACE_ARGS
56void print_function_args(struct trace_seq *s, unsigned long *args,
57			 unsigned long func);
58#else
59static inline void print_function_args(struct trace_seq *s, unsigned long *args,
60				       unsigned long func) {
61	trace_seq_puts(s, "()");
62}
63#endif
64#endif
65