kernel/trace/trace_output.h

0001 // SPDX-License-Identifier: GPL-2.0
0002 #ifndef __TRACE_EVENTS_H
0003 #define __TRACE_EVENTS_H
0004
0005 #include <linux/trace_seq.h>
0006 #include "trace.h"
0007
0008 extern enum print_line_t
0009 trace_print_bputs_msg_only(struct trace_iterator *iter);
0010 extern enum print_line_t
0011 trace_print_bprintk_msg_only(struct trace_iterator *iter);
0012 extern enum print_line_t
0013 trace_print_printk_msg_only(struct trace_iterator *iter);
0014
0015 extern int
0016 seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
0017         unsigned long sym_flags);
0018
0019 extern void trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset);
0020 extern int trace_print_context(struct trace_iterator *iter);
0021 extern int trace_print_lat_context(struct trace_iterator *iter);
0022
0023 extern void trace_event_read_lock(void);
0024 extern void trace_event_read_unlock(void);
0025 extern struct trace_event *ftrace_find_event(int type);
0026
0027 extern enum print_line_t trace_nop_print(struct trace_iterator *iter,
0028                      int flags, struct trace_event *event);
0029 extern int
0030 trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry);
0031
0032 /* used by module unregistering */
0033 extern int __unregister_trace_event(struct trace_event *event);
0034 extern struct rw_semaphore trace_event_sem;
0035
0036 #define SEQ_PUT_FIELD(s, x)             \
0037     trace_seq_putmem(s, &(x), sizeof(x))
0038
0039 #define SEQ_PUT_HEX_FIELD(s, x)             \
0040     trace_seq_putmem_hex(s, &(x), sizeof(x))
0041
0042 #endif
0043