trace_output.c File Reference

#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/ftrace.h>
#include "trace_output.h"

Go to the source code of this file.

Macros
#define	EVENT_HASHSIZE   128
#define	IP_FMT   "%08lx"

Functions
	DECLARE_RWSEM (trace_event_mutex)
int	trace_print_seq (struct seq_file *m, struct trace_seq *s)
enum print_line_t	trace_print_bprintk_msg_only (struct trace_iterator *iter)
enum print_line_t	trace_print_printk_msg_only (struct trace_iterator *iter)
int	trace_seq_printf (struct trace_seq *s, const char *fmt,...)
	EXPORT_SYMBOL_GPL (trace_seq_printf)
int	trace_seq_vprintf (struct trace_seq *s, const char *fmt, va_list args)
	EXPORT_SYMBOL_GPL (trace_seq_vprintf)
int	trace_seq_bprintf (struct trace_seq *s, const char *fmt, const u32 *binary)
int	trace_seq_puts (struct trace_seq *s, const char *str)
int	trace_seq_putc (struct trace_seq *s, unsigned char c)
	EXPORT_SYMBOL (trace_seq_putc)
int	trace_seq_putmem (struct trace_seq *s, const void *mem, size_t len)
int	trace_seq_putmem_hex (struct trace_seq *s, const void *mem, size_t len)
void *	trace_seq_reserve (struct trace_seq *s, size_t len)
int	trace_seq_path (struct trace_seq *s, const struct path *path)
const char *	ftrace_print_flags_seq (struct trace_seq *p, const char *delim, unsigned long flags, const struct trace_print_flags *flag_array)
	EXPORT_SYMBOL (ftrace_print_flags_seq)
const char *	ftrace_print_symbols_seq (struct trace_seq *p, unsigned long val, const struct trace_print_flags *symbol_array)
	EXPORT_SYMBOL (ftrace_print_symbols_seq)
const char *	ftrace_print_hex_seq (struct trace_seq *p, const unsigned char *buf, int buf_len)
	EXPORT_SYMBOL (ftrace_print_hex_seq)
int	seq_print_user_ip (struct trace_seq *s, struct mm_struct *mm, unsigned long ip, unsigned long sym_flags)
int	seq_print_userip_objs (const struct userstack_entry *entry, struct trace_seq *s, unsigned long sym_flags)
int	seq_print_ip_sym (struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
int	trace_print_lat_fmt (struct trace_seq *s, struct trace_entry *entry)
int	trace_print_context (struct trace_iterator *iter)
int	trace_print_lat_context (struct trace_iterator *iter)
struct trace_event *	ftrace_find_event (int type)
void	trace_event_read_lock (void)
void	trace_event_read_unlock (void)
int	register_ftrace_event (struct trace_event *event)
	EXPORT_SYMBOL_GPL (register_ftrace_event)
int	__unregister_ftrace_event (struct trace_event *event)
int	unregister_ftrace_event (struct trace_event *event)
	EXPORT_SYMBOL_GPL (unregister_ftrace_event)
enum print_line_t	trace_nop_print (struct trace_iterator *iter, int flags, struct trace_event *event)
	early_initcall (init_events)

Macro Definition Documentation

#define EVENT_HASHSIZE   128

Definition at line 15 of file trace_output.c.

#define IP_FMT   "%08lx"

Definition at line 450 of file trace_output.c.

Function Documentation

int __unregister_ftrace_event

(

struct trace_event *

event

)

Definition at line 851 of file trace_output.c.

DECLARE_RWSEM

(

trace_event_mutex

)

early_initcall

(

init_events

)

EXPORT_SYMBOL

(

trace_seq_putc

)

EXPORT_SYMBOL

(

ftrace_print_flags_seq

)

EXPORT_SYMBOL

(

ftrace_print_symbols_seq

)

EXPORT_SYMBOL

(

ftrace_print_hex_seq

)

EXPORT_SYMBOL_GPL

(

trace_seq_printf

)

EXPORT_SYMBOL_GPL

(

trace_seq_vprintf

)

EXPORT_SYMBOL_GPL

(

register_ftrace_event

)

EXPORT_SYMBOL_GPL

(

unregister_ftrace_event

)

struct trace_event* ftrace_find_event ( int  type )

read

ftrace_find_event - find a registered event : the type of event to look for

Returns an event of type otherwise NULL Called with trace_event_read_lock() held.

Definition at line 711 of file trace_output.c.

const char* ftrace_print_flags_seq	(	struct trace_seq *	p,
		const char *	delim,
		unsigned long	flags,
		const struct trace_print_flags *	flag_array
	)

Definition at line 296 of file trace_output.c.

const char* ftrace_print_hex_seq	(	struct trace_seq *	p,
		const unsigned char *	buf,
		int	buf_len
	)

Definition at line 386 of file trace_output.c.

const char* ftrace_print_symbols_seq	(	struct trace_seq *	p,
		unsigned long	val,
		const struct trace_print_flags *	symbol_array
	)

Definition at line 334 of file trace_output.c.

int register_ftrace_event

(

struct trace_event *

event

)

register_ftrace_event - register output for an event type : the event type to register

Event types are stored in a hash and this hash is used to find a way to print an event. If the ->type is set then it will use that type, otherwise it will assign a type to use.

If you assign your own type, please make sure it is added to the trace_type enum in trace.h, to avoid collisions with the dynamic types.

Returns the event type number or zero on error.

Definition at line 782 of file trace_output.c.

int seq_print_ip_sym	(	struct trace_seq *	s,
		unsigned long	ip,
		unsigned long	sym_flags
	)

Definition at line 535 of file trace_output.c.

int seq_print_user_ip	(	struct trace_seq *	s,
		struct mm_struct *	mm,
		unsigned long	ip,
		unsigned long	sym_flags
	)

Definition at line 455 of file trace_output.c.

int seq_print_userip_objs	(	const struct userstack_entry *	entry,
		struct trace_seq *	s,
		unsigned long	sym_flags
	)

Definition at line 488 of file trace_output.c.

void trace_event_read_lock

(

void

)

Definition at line 757 of file trace_output.c.

void trace_event_read_unlock

(

void

)

Definition at line 762 of file trace_output.c.

enum print_line_t trace_nop_print	(	struct trace_iterator *	iter,
		int	flags,
		struct trace_event *	event
	)

Definition at line 876 of file trace_output.c.

enum print_line_t trace_print_bprintk_msg_only

(

struct trace_iterator *

iter

)

Definition at line 40 of file trace_output.c.

int trace_print_context

(

struct trace_iterator *

iter

)

Definition at line 624 of file trace_output.c.

int trace_print_lat_context

(

struct trace_iterator *

iter

)

Definition at line 651 of file trace_output.c.

int trace_print_lat_fmt	(	struct trace_seq *	s,
		struct trace_entry *	entry
	)

trace_print_lat_fmt - print the irq, preempt and lockdep fields : trace seq struct to write to : The trace entry field from the ring buffer

Prints the generic fields of irqs off, in hard or softirq, preempt count.

Definition at line 563 of file trace_output.c.

enum print_line_t trace_print_printk_msg_only

(

struct trace_iterator *

iter

)

Definition at line 56 of file trace_output.c.

int trace_print_seq	(	struct seq_file *	m,
		struct trace_seq *	s
	)

Definition at line 23 of file trace_output.c.

int trace_seq_bprintf	(	struct trace_seq *	s,
		const char *	fmt,
		const u32 *	binary
	)

Definition at line 146 of file trace_output.c.

int trace_seq_path	(	struct trace_seq *	s,
		const struct path *	path
	)

Definition at line 267 of file trace_output.c.

int trace_seq_printf	(	struct trace_seq *	s,
		const char *	fmt,
			...
	)

trace_seq_printf - sequence printing of trace information : trace sequence descriptor : printf format string

It returns 0 if the trace oversizes the buffer's free space, 1 otherwise.

The tracer may use either sequence operations or its own copy to user routines. To simplify formating of a trace trace_seq_printf is used to store strings into a special buffer (). Then the output may be either used by the sequencer or pulled into another buffer.

Definition at line 87 of file trace_output.c.

int trace_seq_putc	(	struct trace_seq *	s,
		unsigned char	c
	)

Definition at line 195 of file trace_output.c.

int trace_seq_putmem	(	struct trace_seq *	s,
		const void *	mem,
		size_t	len
	)

Definition at line 211 of file trace_output.c.

int trace_seq_putmem_hex	(	struct trace_seq *	s,
		const void *	mem,
		size_t	len
	)

Definition at line 227 of file trace_output.c.

int trace_seq_puts	(	struct trace_seq *	s,
		const char *	str
	)

trace_seq_puts - trace sequence printing of simple string : trace sequence descriptor : simple string to record

The tracer may use either the sequence operations or its own copy to user routines. This function records a simple string into a special buffer () for later retrieval by a sequencer or other mechanism.

Definition at line 177 of file trace_output.c.

void* trace_seq_reserve	(	struct trace_seq *	s,
		size_t	len
	)

Definition at line 249 of file trace_output.c.

int trace_seq_vprintf	(	struct trace_seq *	s,
		const char *	fmt,
		va_list	args
	)

trace_seq_vprintf - sequence printing of trace information : trace sequence descriptor : printf format string

The tracer may use either sequence operations or its own copy to user routines. To simplify formating of a trace trace_seq_printf is used to store strings into a special buffer (). Then the output may be either used by the sequencer or pulled into another buffer.

Definition at line 124 of file trace_output.c.

int unregister_ftrace_event

(

struct trace_event *

event

)

unregister_ftrace_event - remove a no longer used event : the event to remove

Definition at line 862 of file trace_output.c.