4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10 #include <linux/ftrace.h>
12 #include "trace_output.h"
14 /* must be a power of 2 */
15 #define EVENT_HASHSIZE 128
17 DECLARE_RWSEM(trace_event_sem
);
19 static struct hlist_head event_hash
[EVENT_HASHSIZE
] __read_mostly
;
21 static int next_event_type
= __TRACE_LAST_TYPE
+ 1;
23 int trace_print_seq(struct seq_file
*m
, struct trace_seq
*s
)
25 int len
= s
->len
>= PAGE_SIZE
? PAGE_SIZE
- 1 : s
->len
;
28 ret
= seq_write(m
, s
->buffer
, len
);
31 * Only reset this buffer if we successfully wrote to the
40 enum print_line_t
trace_print_bputs_msg_only(struct trace_iterator
*iter
)
42 struct trace_seq
*s
= &iter
->seq
;
43 struct trace_entry
*entry
= iter
->ent
;
44 struct bputs_entry
*field
;
47 trace_assign_type(field
, entry
);
49 ret
= trace_seq_puts(s
, field
->str
);
51 return TRACE_TYPE_PARTIAL_LINE
;
53 return TRACE_TYPE_HANDLED
;
56 enum print_line_t
trace_print_bprintk_msg_only(struct trace_iterator
*iter
)
58 struct trace_seq
*s
= &iter
->seq
;
59 struct trace_entry
*entry
= iter
->ent
;
60 struct bprint_entry
*field
;
63 trace_assign_type(field
, entry
);
65 ret
= trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
67 return TRACE_TYPE_PARTIAL_LINE
;
69 return TRACE_TYPE_HANDLED
;
72 enum print_line_t
trace_print_printk_msg_only(struct trace_iterator
*iter
)
74 struct trace_seq
*s
= &iter
->seq
;
75 struct trace_entry
*entry
= iter
->ent
;
76 struct print_entry
*field
;
79 trace_assign_type(field
, entry
);
81 ret
= trace_seq_puts(s
, field
->buf
);
83 return TRACE_TYPE_PARTIAL_LINE
;
85 return TRACE_TYPE_HANDLED
;
89 * trace_seq_printf - sequence printing of trace information
90 * @s: trace sequence descriptor
91 * @fmt: printf format string
93 * It returns 0 if the trace oversizes the buffer's free
96 * The tracer may use either sequence operations or its own
97 * copy to user routines. To simplify formating of a trace
98 * trace_seq_printf is used to store strings into a special
99 * buffer (@s). Then the output may be either used by
100 * the sequencer or pulled into another buffer.
103 trace_seq_printf(struct trace_seq
*s
, const char *fmt
, ...)
105 int len
= (PAGE_SIZE
- 1) - s
->len
;
113 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, ap
);
116 /* If we can't write it all, don't bother writing anything */
126 EXPORT_SYMBOL_GPL(trace_seq_printf
);
129 * trace_seq_bitmask - put a list of longs as a bitmask print output
130 * @s: trace sequence descriptor
131 * @maskp: points to an array of unsigned longs that represent a bitmask
132 * @nmaskbits: The number of bits that are valid in @maskp
134 * It returns 0 if the trace oversizes the buffer's free
135 * space, 1 otherwise.
137 * Writes a ASCII representation of a bitmask string into @s.
140 trace_seq_bitmask(struct trace_seq
*s
, const unsigned long *maskp
,
143 int len
= (PAGE_SIZE
- 1) - s
->len
;
149 ret
= bitmap_scnprintf(s
->buffer
, len
, maskp
, nmaskbits
);
154 EXPORT_SYMBOL_GPL(trace_seq_bitmask
);
157 * trace_seq_vprintf - sequence printing of trace information
158 * @s: trace sequence descriptor
159 * @fmt: printf format string
161 * The tracer may use either sequence operations or its own
162 * copy to user routines. To simplify formating of a trace
163 * trace_seq_printf is used to store strings into a special
164 * buffer (@s). Then the output may be either used by
165 * the sequencer or pulled into another buffer.
168 trace_seq_vprintf(struct trace_seq
*s
, const char *fmt
, va_list args
)
170 int len
= (PAGE_SIZE
- 1) - s
->len
;
176 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, args
);
178 /* If we can't write it all, don't bother writing anything */
188 EXPORT_SYMBOL_GPL(trace_seq_vprintf
);
190 int trace_seq_bprintf(struct trace_seq
*s
, const char *fmt
, const u32
*binary
)
192 int len
= (PAGE_SIZE
- 1) - s
->len
;
198 ret
= bstr_printf(s
->buffer
+ s
->len
, len
, fmt
, binary
);
200 /* If we can't write it all, don't bother writing anything */
212 * trace_seq_puts - trace sequence printing of simple string
213 * @s: trace sequence descriptor
214 * @str: simple string to record
216 * The tracer may use either the sequence operations or its own
217 * copy to user routines. This function records a simple string
218 * into a special buffer (@s) for later retrieval by a sequencer
219 * or other mechanism.
221 int trace_seq_puts(struct trace_seq
*s
, const char *str
)
223 int len
= strlen(str
);
228 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
233 memcpy(s
->buffer
+ s
->len
, str
, len
);
239 int trace_seq_putc(struct trace_seq
*s
, unsigned char c
)
244 if (s
->len
>= (PAGE_SIZE
- 1)) {
249 s
->buffer
[s
->len
++] = c
;
253 EXPORT_SYMBOL(trace_seq_putc
);
255 int trace_seq_putmem(struct trace_seq
*s
, const void *mem
, size_t len
)
260 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
265 memcpy(s
->buffer
+ s
->len
, mem
, len
);
271 int trace_seq_putmem_hex(struct trace_seq
*s
, const void *mem
, size_t len
)
273 unsigned char hex
[HEX_CHARS
];
274 const unsigned char *data
= mem
;
281 for (i
= 0, j
= 0; i
< len
; i
++) {
283 for (i
= len
-1, j
= 0; i
>= 0; i
--) {
285 hex
[j
++] = hex_asc_hi(data
[i
]);
286 hex
[j
++] = hex_asc_lo(data
[i
]);
290 return trace_seq_putmem(s
, hex
, j
);
293 void *trace_seq_reserve(struct trace_seq
*s
, size_t len
)
300 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
305 ret
= s
->buffer
+ s
->len
;
311 int trace_seq_path(struct trace_seq
*s
, const struct path
*path
)
318 if (s
->len
>= (PAGE_SIZE
- 1)) {
323 p
= d_path(path
, s
->buffer
+ s
->len
, PAGE_SIZE
- s
->len
);
325 p
= mangle_path(s
->buffer
+ s
->len
, p
, "\n");
327 s
->len
= p
- s
->buffer
;
331 s
->buffer
[s
->len
++] = '?';
340 ftrace_print_flags_seq(struct trace_seq
*p
, const char *delim
,
342 const struct trace_print_flags
*flag_array
)
346 const char *ret
= p
->buffer
+ p
->len
;
349 for (i
= 0; flag_array
[i
].name
&& flags
; i
++) {
351 mask
= flag_array
[i
].mask
;
352 if ((flags
& mask
) != mask
)
355 str
= flag_array
[i
].name
;
358 trace_seq_puts(p
, delim
);
361 trace_seq_puts(p
, str
);
364 /* check for left over flags */
367 trace_seq_puts(p
, delim
);
368 trace_seq_printf(p
, "0x%lx", flags
);
371 trace_seq_putc(p
, 0);
375 EXPORT_SYMBOL(ftrace_print_flags_seq
);
378 ftrace_print_symbols_seq(struct trace_seq
*p
, unsigned long val
,
379 const struct trace_print_flags
*symbol_array
)
382 const char *ret
= p
->buffer
+ p
->len
;
384 for (i
= 0; symbol_array
[i
].name
; i
++) {
386 if (val
!= symbol_array
[i
].mask
)
389 trace_seq_puts(p
, symbol_array
[i
].name
);
393 if (ret
== (const char *)(p
->buffer
+ p
->len
))
394 trace_seq_printf(p
, "0x%lx", val
);
396 trace_seq_putc(p
, 0);
400 EXPORT_SYMBOL(ftrace_print_symbols_seq
);
402 #if BITS_PER_LONG == 32
404 ftrace_print_symbols_seq_u64(struct trace_seq
*p
, unsigned long long val
,
405 const struct trace_print_flags_u64
*symbol_array
)
408 const char *ret
= p
->buffer
+ p
->len
;
410 for (i
= 0; symbol_array
[i
].name
; i
++) {
412 if (val
!= symbol_array
[i
].mask
)
415 trace_seq_puts(p
, symbol_array
[i
].name
);
419 if (ret
== (const char *)(p
->buffer
+ p
->len
))
420 trace_seq_printf(p
, "0x%llx", val
);
422 trace_seq_putc(p
, 0);
426 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64
);
430 ftrace_print_bitmask_seq(struct trace_seq
*p
, void *bitmask_ptr
,
431 unsigned int bitmask_size
)
433 const char *ret
= p
->buffer
+ p
->len
;
435 trace_seq_bitmask(p
, bitmask_ptr
, bitmask_size
* 8);
436 trace_seq_putc(p
, 0);
440 EXPORT_SYMBOL_GPL(ftrace_print_bitmask_seq
);
443 ftrace_print_hex_seq(struct trace_seq
*p
, const unsigned char *buf
, int buf_len
)
446 const char *ret
= p
->buffer
+ p
->len
;
448 for (i
= 0; i
< buf_len
; i
++)
449 trace_seq_printf(p
, "%s%2.2x", i
== 0 ? "" : " ", buf
[i
]);
451 trace_seq_putc(p
, 0);
455 EXPORT_SYMBOL(ftrace_print_hex_seq
);
457 int ftrace_raw_output_prep(struct trace_iterator
*iter
,
458 struct trace_event
*trace_event
)
460 struct ftrace_event_call
*event
;
461 struct trace_seq
*s
= &iter
->seq
;
462 struct trace_seq
*p
= &iter
->tmp_seq
;
463 struct trace_entry
*entry
;
466 event
= container_of(trace_event
, struct ftrace_event_call
, event
);
469 if (entry
->type
!= event
->event
.type
) {
471 return TRACE_TYPE_UNHANDLED
;
475 ret
= trace_seq_printf(s
, "%s: ", ftrace_event_name(event
));
477 return TRACE_TYPE_PARTIAL_LINE
;
481 EXPORT_SYMBOL(ftrace_raw_output_prep
);
483 static int ftrace_output_raw(struct trace_iterator
*iter
, char *name
,
484 char *fmt
, va_list ap
)
486 struct trace_seq
*s
= &iter
->seq
;
489 ret
= trace_seq_printf(s
, "%s: ", name
);
491 return TRACE_TYPE_PARTIAL_LINE
;
493 ret
= trace_seq_vprintf(s
, fmt
, ap
);
496 return TRACE_TYPE_PARTIAL_LINE
;
498 return TRACE_TYPE_HANDLED
;
501 int ftrace_output_call(struct trace_iterator
*iter
, char *name
, char *fmt
, ...)
507 ret
= ftrace_output_raw(iter
, name
, fmt
, ap
);
512 EXPORT_SYMBOL_GPL(ftrace_output_call
);
514 #ifdef CONFIG_KRETPROBES
515 static inline const char *kretprobed(const char *name
)
517 static const char tramp_name
[] = "kretprobe_trampoline";
518 int size
= sizeof(tramp_name
);
520 if (strncmp(tramp_name
, name
, size
) == 0)
521 return "[unknown/kretprobe'd]";
525 static inline const char *kretprobed(const char *name
)
529 #endif /* CONFIG_KRETPROBES */
532 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
534 #ifdef CONFIG_KALLSYMS
535 char str
[KSYM_SYMBOL_LEN
];
538 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
540 name
= kretprobed(str
);
542 return trace_seq_printf(s
, fmt
, name
);
548 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
549 unsigned long address
)
551 #ifdef CONFIG_KALLSYMS
552 char str
[KSYM_SYMBOL_LEN
];
555 sprint_symbol(str
, address
);
556 name
= kretprobed(str
);
558 return trace_seq_printf(s
, fmt
, name
);
564 # define IP_FMT "%08lx"
566 # define IP_FMT "%016lx"
569 int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
570 unsigned long ip
, unsigned long sym_flags
)
572 struct file
*file
= NULL
;
573 unsigned long vmstart
= 0;
580 const struct vm_area_struct
*vma
;
582 down_read(&mm
->mmap_sem
);
583 vma
= find_vma(mm
, ip
);
586 vmstart
= vma
->vm_start
;
589 ret
= trace_seq_path(s
, &file
->f_path
);
591 ret
= trace_seq_printf(s
, "[+0x%lx]",
594 up_read(&mm
->mmap_sem
);
596 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
597 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
602 seq_print_userip_objs(const struct userstack_entry
*entry
, struct trace_seq
*s
,
603 unsigned long sym_flags
)
605 struct mm_struct
*mm
= NULL
;
609 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
610 struct task_struct
*task
;
612 * we do the lookup on the thread group leader,
613 * since individual threads might have already quit!
616 task
= find_task_by_vpid(entry
->tgid
);
618 mm
= get_task_mm(task
);
622 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
623 unsigned long ip
= entry
->caller
[i
];
625 if (ip
== ULONG_MAX
|| !ret
)
628 ret
= trace_seq_puts(s
, " => ");
631 ret
= trace_seq_puts(s
, "??");
633 ret
= trace_seq_putc(s
, '\n');
639 ret
= seq_print_user_ip(s
, mm
, ip
, sym_flags
);
640 ret
= trace_seq_putc(s
, '\n');
649 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
654 return trace_seq_putc(s
, '0');
656 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
657 ret
= seq_print_sym_offset(s
, "%s", ip
);
659 ret
= seq_print_sym_short(s
, "%s", ip
);
664 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
665 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
670 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
671 * @s: trace seq struct to write to
672 * @entry: The trace entry field from the ring buffer
674 * Prints the generic fields of irqs off, in hard or softirq, preempt
677 int trace_print_lat_fmt(struct trace_seq
*s
, struct trace_entry
*entry
)
686 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
687 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
690 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
691 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ? 'X' :
694 switch (entry
->flags
& (TRACE_FLAG_NEED_RESCHED
|
695 TRACE_FLAG_PREEMPT_RESCHED
)) {
696 case TRACE_FLAG_NEED_RESCHED
| TRACE_FLAG_PREEMPT_RESCHED
:
699 case TRACE_FLAG_NEED_RESCHED
:
702 case TRACE_FLAG_PREEMPT_RESCHED
:
711 (hardirq
&& softirq
) ? 'H' :
716 if (!trace_seq_printf(s
, "%c%c%c",
717 irqs_off
, need_resched
, hardsoft_irq
))
720 if (entry
->preempt_count
)
721 ret
= trace_seq_printf(s
, "%x", entry
->preempt_count
);
723 ret
= trace_seq_putc(s
, '.');
729 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
731 char comm
[TASK_COMM_LEN
];
733 trace_find_cmdline(entry
->pid
, comm
);
735 if (!trace_seq_printf(s
, "%8.8s-%-5d %3d",
736 comm
, entry
->pid
, cpu
))
739 return trace_print_lat_fmt(s
, entry
);
742 static unsigned long preempt_mark_thresh_us
= 100;
745 lat_print_timestamp(struct trace_iterator
*iter
, u64 next_ts
)
747 unsigned long verbose
= trace_flags
& TRACE_ITER_VERBOSE
;
748 unsigned long in_ns
= iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
;
749 unsigned long long abs_ts
= iter
->ts
- iter
->trace_buffer
->time_start
;
750 unsigned long long rel_ts
= next_ts
- iter
->ts
;
751 struct trace_seq
*s
= &iter
->seq
;
754 abs_ts
= ns2usecs(abs_ts
);
755 rel_ts
= ns2usecs(rel_ts
);
758 if (verbose
&& in_ns
) {
759 unsigned long abs_usec
= do_div(abs_ts
, USEC_PER_MSEC
);
760 unsigned long abs_msec
= (unsigned long)abs_ts
;
761 unsigned long rel_usec
= do_div(rel_ts
, USEC_PER_MSEC
);
762 unsigned long rel_msec
= (unsigned long)rel_ts
;
764 return trace_seq_printf(
765 s
, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
769 } else if (verbose
&& !in_ns
) {
770 return trace_seq_printf(
771 s
, "[%016llx] %lld (+%lld): ",
772 iter
->ts
, abs_ts
, rel_ts
);
773 } else if (!verbose
&& in_ns
) {
774 return trace_seq_printf(
777 rel_ts
> preempt_mark_thresh_us
? '!' :
778 rel_ts
> 1 ? '+' : ' ');
779 } else { /* !verbose && !in_ns */
780 return trace_seq_printf(s
, " %4lld: ", abs_ts
);
784 int trace_print_context(struct trace_iterator
*iter
)
786 struct trace_seq
*s
= &iter
->seq
;
787 struct trace_entry
*entry
= iter
->ent
;
788 unsigned long long t
;
789 unsigned long secs
, usec_rem
;
790 char comm
[TASK_COMM_LEN
];
793 trace_find_cmdline(entry
->pid
, comm
);
795 ret
= trace_seq_printf(s
, "%16s-%-5d [%03d] ",
796 comm
, entry
->pid
, iter
->cpu
);
800 if (trace_flags
& TRACE_ITER_IRQ_INFO
) {
801 ret
= trace_print_lat_fmt(s
, entry
);
806 if (iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
) {
807 t
= ns2usecs(iter
->ts
);
808 usec_rem
= do_div(t
, USEC_PER_SEC
);
809 secs
= (unsigned long)t
;
810 return trace_seq_printf(s
, " %5lu.%06lu: ", secs
, usec_rem
);
812 return trace_seq_printf(s
, " %12llu: ", iter
->ts
);
815 int trace_print_lat_context(struct trace_iterator
*iter
)
819 /* trace_find_next_entry will reset ent_size */
820 int ent_size
= iter
->ent_size
;
821 struct trace_seq
*s
= &iter
->seq
;
822 struct trace_entry
*entry
= iter
->ent
,
823 *next_entry
= trace_find_next_entry(iter
, NULL
,
825 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
827 /* Restore the original ent_size */
828 iter
->ent_size
= ent_size
;
834 char comm
[TASK_COMM_LEN
];
836 trace_find_cmdline(entry
->pid
, comm
);
838 ret
= trace_seq_printf(
839 s
, "%16s %5d %3d %d %08x %08lx ",
840 comm
, entry
->pid
, iter
->cpu
, entry
->flags
,
841 entry
->preempt_count
, iter
->idx
);
843 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
847 ret
= lat_print_timestamp(iter
, next_ts
);
852 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
854 static int task_state_char(unsigned long state
)
856 int bit
= state
? __ffs(state
) + 1 : 0;
858 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
862 * ftrace_find_event - find a registered event
863 * @type: the type of event to look for
865 * Returns an event of type @type otherwise NULL
866 * Called with trace_event_read_lock() held.
868 struct trace_event
*ftrace_find_event(int type
)
870 struct trace_event
*event
;
873 key
= type
& (EVENT_HASHSIZE
- 1);
875 hlist_for_each_entry(event
, &event_hash
[key
], node
) {
876 if (event
->type
== type
)
883 static LIST_HEAD(ftrace_event_list
);
885 static int trace_search_list(struct list_head
**list
)
887 struct trace_event
*e
;
888 int last
= __TRACE_LAST_TYPE
;
890 if (list_empty(&ftrace_event_list
)) {
891 *list
= &ftrace_event_list
;
896 * We used up all possible max events,
897 * lets see if somebody freed one.
899 list_for_each_entry(e
, &ftrace_event_list
, list
) {
900 if (e
->type
!= last
+ 1)
905 /* Did we used up all 65 thousand events??? */
906 if ((last
+ 1) > FTRACE_MAX_EVENT
)
913 void trace_event_read_lock(void)
915 down_read(&trace_event_sem
);
918 void trace_event_read_unlock(void)
920 up_read(&trace_event_sem
);
924 * register_ftrace_event - register output for an event type
925 * @event: the event type to register
927 * Event types are stored in a hash and this hash is used to
928 * find a way to print an event. If the @event->type is set
929 * then it will use that type, otherwise it will assign a
932 * If you assign your own type, please make sure it is added
933 * to the trace_type enum in trace.h, to avoid collisions
934 * with the dynamic types.
936 * Returns the event type number or zero on error.
938 int register_ftrace_event(struct trace_event
*event
)
943 down_write(&trace_event_sem
);
948 if (WARN_ON(!event
->funcs
))
951 INIT_LIST_HEAD(&event
->list
);
954 struct list_head
*list
= NULL
;
956 if (next_event_type
> FTRACE_MAX_EVENT
) {
958 event
->type
= trace_search_list(&list
);
964 event
->type
= next_event_type
++;
965 list
= &ftrace_event_list
;
968 if (WARN_ON(ftrace_find_event(event
->type
)))
971 list_add_tail(&event
->list
, list
);
973 } else if (event
->type
> __TRACE_LAST_TYPE
) {
974 printk(KERN_WARNING
"Need to add type to trace.h\n");
978 /* Is this event already used */
979 if (ftrace_find_event(event
->type
))
983 if (event
->funcs
->trace
== NULL
)
984 event
->funcs
->trace
= trace_nop_print
;
985 if (event
->funcs
->raw
== NULL
)
986 event
->funcs
->raw
= trace_nop_print
;
987 if (event
->funcs
->hex
== NULL
)
988 event
->funcs
->hex
= trace_nop_print
;
989 if (event
->funcs
->binary
== NULL
)
990 event
->funcs
->binary
= trace_nop_print
;
992 key
= event
->type
& (EVENT_HASHSIZE
- 1);
994 hlist_add_head(&event
->node
, &event_hash
[key
]);
998 up_write(&trace_event_sem
);
1002 EXPORT_SYMBOL_GPL(register_ftrace_event
);
1005 * Used by module code with the trace_event_sem held for write.
1007 int __unregister_ftrace_event(struct trace_event
*event
)
1009 hlist_del(&event
->node
);
1010 list_del(&event
->list
);
1015 * unregister_ftrace_event - remove a no longer used event
1016 * @event: the event to remove
1018 int unregister_ftrace_event(struct trace_event
*event
)
1020 down_write(&trace_event_sem
);
1021 __unregister_ftrace_event(event
);
1022 up_write(&trace_event_sem
);
1026 EXPORT_SYMBOL_GPL(unregister_ftrace_event
);
1032 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
1033 struct trace_event
*event
)
1035 if (!trace_seq_printf(&iter
->seq
, "type: %d\n", iter
->ent
->type
))
1036 return TRACE_TYPE_PARTIAL_LINE
;
1038 return TRACE_TYPE_HANDLED
;
1042 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
1043 struct trace_event
*event
)
1045 struct ftrace_entry
*field
;
1046 struct trace_seq
*s
= &iter
->seq
;
1048 trace_assign_type(field
, iter
->ent
);
1050 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1053 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
1054 if (!trace_seq_puts(s
, " <-"))
1056 if (!seq_print_ip_sym(s
,
1061 if (!trace_seq_putc(s
, '\n'))
1064 return TRACE_TYPE_HANDLED
;
1067 return TRACE_TYPE_PARTIAL_LINE
;
1070 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
1071 struct trace_event
*event
)
1073 struct ftrace_entry
*field
;
1075 trace_assign_type(field
, iter
->ent
);
1077 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
1080 return TRACE_TYPE_PARTIAL_LINE
;
1082 return TRACE_TYPE_HANDLED
;
1085 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
1086 struct trace_event
*event
)
1088 struct ftrace_entry
*field
;
1089 struct trace_seq
*s
= &iter
->seq
;
1091 trace_assign_type(field
, iter
->ent
);
1093 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
1094 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
1096 return TRACE_TYPE_HANDLED
;
1099 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
1100 struct trace_event
*event
)
1102 struct ftrace_entry
*field
;
1103 struct trace_seq
*s
= &iter
->seq
;
1105 trace_assign_type(field
, iter
->ent
);
1107 SEQ_PUT_FIELD_RET(s
, field
->ip
);
1108 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
1110 return TRACE_TYPE_HANDLED
;
1113 static struct trace_event_functions trace_fn_funcs
= {
1114 .trace
= trace_fn_trace
,
1115 .raw
= trace_fn_raw
,
1116 .hex
= trace_fn_hex
,
1117 .binary
= trace_fn_bin
,
1120 static struct trace_event trace_fn_event
= {
1122 .funcs
= &trace_fn_funcs
,
1125 /* TRACE_CTX an TRACE_WAKE */
1126 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
1129 struct ctx_switch_entry
*field
;
1130 char comm
[TASK_COMM_LEN
];
1134 trace_assign_type(field
, iter
->ent
);
1136 T
= task_state_char(field
->next_state
);
1137 S
= task_state_char(field
->prev_state
);
1138 trace_find_cmdline(field
->next_pid
, comm
);
1139 if (!trace_seq_printf(&iter
->seq
,
1140 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1148 return TRACE_TYPE_PARTIAL_LINE
;
1150 return TRACE_TYPE_HANDLED
;
1153 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
1154 struct trace_event
*event
)
1156 return trace_ctxwake_print(iter
, "==>");
1159 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
1160 int flags
, struct trace_event
*event
)
1162 return trace_ctxwake_print(iter
, " +");
1165 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
1167 struct ctx_switch_entry
*field
;
1170 trace_assign_type(field
, iter
->ent
);
1173 S
= task_state_char(field
->prev_state
);
1174 T
= task_state_char(field
->next_state
);
1175 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
1183 return TRACE_TYPE_PARTIAL_LINE
;
1185 return TRACE_TYPE_HANDLED
;
1188 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
1189 struct trace_event
*event
)
1191 return trace_ctxwake_raw(iter
, 0);
1194 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
1195 struct trace_event
*event
)
1197 return trace_ctxwake_raw(iter
, '+');
1201 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
1203 struct ctx_switch_entry
*field
;
1204 struct trace_seq
*s
= &iter
->seq
;
1207 trace_assign_type(field
, iter
->ent
);
1210 S
= task_state_char(field
->prev_state
);
1211 T
= task_state_char(field
->next_state
);
1213 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
1214 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
1215 SEQ_PUT_HEX_FIELD_RET(s
, S
);
1216 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
1217 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
1218 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
1219 SEQ_PUT_HEX_FIELD_RET(s
, T
);
1221 return TRACE_TYPE_HANDLED
;
1224 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
1225 struct trace_event
*event
)
1227 return trace_ctxwake_hex(iter
, 0);
1230 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
1231 struct trace_event
*event
)
1233 return trace_ctxwake_hex(iter
, '+');
1236 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
1237 int flags
, struct trace_event
*event
)
1239 struct ctx_switch_entry
*field
;
1240 struct trace_seq
*s
= &iter
->seq
;
1242 trace_assign_type(field
, iter
->ent
);
1244 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
1245 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
1246 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
1247 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
1248 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
1249 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
1251 return TRACE_TYPE_HANDLED
;
1254 static struct trace_event_functions trace_ctx_funcs
= {
1255 .trace
= trace_ctx_print
,
1256 .raw
= trace_ctx_raw
,
1257 .hex
= trace_ctx_hex
,
1258 .binary
= trace_ctxwake_bin
,
1261 static struct trace_event trace_ctx_event
= {
1263 .funcs
= &trace_ctx_funcs
,
1266 static struct trace_event_functions trace_wake_funcs
= {
1267 .trace
= trace_wake_print
,
1268 .raw
= trace_wake_raw
,
1269 .hex
= trace_wake_hex
,
1270 .binary
= trace_ctxwake_bin
,
1273 static struct trace_event trace_wake_event
= {
1275 .funcs
= &trace_wake_funcs
,
1280 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1281 int flags
, struct trace_event
*event
)
1283 struct stack_entry
*field
;
1284 struct trace_seq
*s
= &iter
->seq
;
1288 trace_assign_type(field
, iter
->ent
);
1289 end
= (unsigned long *)((long)iter
->ent
+ iter
->ent_size
);
1291 if (!trace_seq_puts(s
, "<stack trace>\n"))
1294 for (p
= field
->caller
; p
&& *p
!= ULONG_MAX
&& p
< end
; p
++) {
1295 if (!trace_seq_puts(s
, " => "))
1298 if (!seq_print_ip_sym(s
, *p
, flags
))
1300 if (!trace_seq_putc(s
, '\n'))
1304 return TRACE_TYPE_HANDLED
;
1307 return TRACE_TYPE_PARTIAL_LINE
;
1310 static struct trace_event_functions trace_stack_funcs
= {
1311 .trace
= trace_stack_print
,
1314 static struct trace_event trace_stack_event
= {
1315 .type
= TRACE_STACK
,
1316 .funcs
= &trace_stack_funcs
,
1319 /* TRACE_USER_STACK */
1320 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1321 int flags
, struct trace_event
*event
)
1323 struct userstack_entry
*field
;
1324 struct trace_seq
*s
= &iter
->seq
;
1326 trace_assign_type(field
, iter
->ent
);
1328 if (!trace_seq_puts(s
, "<user stack trace>\n"))
1331 if (!seq_print_userip_objs(field
, s
, flags
))
1334 return TRACE_TYPE_HANDLED
;
1337 return TRACE_TYPE_PARTIAL_LINE
;
1340 static struct trace_event_functions trace_user_stack_funcs
= {
1341 .trace
= trace_user_stack_print
,
1344 static struct trace_event trace_user_stack_event
= {
1345 .type
= TRACE_USER_STACK
,
1346 .funcs
= &trace_user_stack_funcs
,
1350 static enum print_line_t
1351 trace_bputs_print(struct trace_iterator
*iter
, int flags
,
1352 struct trace_event
*event
)
1354 struct trace_entry
*entry
= iter
->ent
;
1355 struct trace_seq
*s
= &iter
->seq
;
1356 struct bputs_entry
*field
;
1358 trace_assign_type(field
, entry
);
1360 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1363 if (!trace_seq_puts(s
, ": "))
1366 if (!trace_seq_puts(s
, field
->str
))
1369 return TRACE_TYPE_HANDLED
;
1372 return TRACE_TYPE_PARTIAL_LINE
;
1376 static enum print_line_t
1377 trace_bputs_raw(struct trace_iterator
*iter
, int flags
,
1378 struct trace_event
*event
)
1380 struct bputs_entry
*field
;
1381 struct trace_seq
*s
= &iter
->seq
;
1383 trace_assign_type(field
, iter
->ent
);
1385 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
1388 if (!trace_seq_puts(s
, field
->str
))
1391 return TRACE_TYPE_HANDLED
;
1394 return TRACE_TYPE_PARTIAL_LINE
;
1397 static struct trace_event_functions trace_bputs_funcs
= {
1398 .trace
= trace_bputs_print
,
1399 .raw
= trace_bputs_raw
,
1402 static struct trace_event trace_bputs_event
= {
1403 .type
= TRACE_BPUTS
,
1404 .funcs
= &trace_bputs_funcs
,
1408 static enum print_line_t
1409 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1410 struct trace_event
*event
)
1412 struct trace_entry
*entry
= iter
->ent
;
1413 struct trace_seq
*s
= &iter
->seq
;
1414 struct bprint_entry
*field
;
1416 trace_assign_type(field
, entry
);
1418 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1421 if (!trace_seq_puts(s
, ": "))
1424 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1427 return TRACE_TYPE_HANDLED
;
1430 return TRACE_TYPE_PARTIAL_LINE
;
1434 static enum print_line_t
1435 trace_bprint_raw(struct trace_iterator
*iter
, int flags
,
1436 struct trace_event
*event
)
1438 struct bprint_entry
*field
;
1439 struct trace_seq
*s
= &iter
->seq
;
1441 trace_assign_type(field
, iter
->ent
);
1443 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
1446 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1449 return TRACE_TYPE_HANDLED
;
1452 return TRACE_TYPE_PARTIAL_LINE
;
1455 static struct trace_event_functions trace_bprint_funcs
= {
1456 .trace
= trace_bprint_print
,
1457 .raw
= trace_bprint_raw
,
1460 static struct trace_event trace_bprint_event
= {
1461 .type
= TRACE_BPRINT
,
1462 .funcs
= &trace_bprint_funcs
,
1466 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1467 int flags
, struct trace_event
*event
)
1469 struct print_entry
*field
;
1470 struct trace_seq
*s
= &iter
->seq
;
1472 trace_assign_type(field
, iter
->ent
);
1474 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1477 if (!trace_seq_printf(s
, ": %s", field
->buf
))
1480 return TRACE_TYPE_HANDLED
;
1483 return TRACE_TYPE_PARTIAL_LINE
;
1486 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1487 struct trace_event
*event
)
1489 struct print_entry
*field
;
1491 trace_assign_type(field
, iter
->ent
);
1493 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
1496 return TRACE_TYPE_HANDLED
;
1499 return TRACE_TYPE_PARTIAL_LINE
;
1502 static struct trace_event_functions trace_print_funcs
= {
1503 .trace
= trace_print_print
,
1504 .raw
= trace_print_raw
,
1507 static struct trace_event trace_print_event
= {
1508 .type
= TRACE_PRINT
,
1509 .funcs
= &trace_print_funcs
,
1513 static struct trace_event
*events
[] __initdata
= {
1518 &trace_user_stack_event
,
1520 &trace_bprint_event
,
1525 __init
static int init_events(void)
1527 struct trace_event
*event
;
1530 for (i
= 0; events
[i
]; i
++) {
1533 ret
= register_ftrace_event(event
);
1535 printk(KERN_WARNING
"event %d failed to register\n",
1543 early_initcall(init_events
);