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_mutex
);
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_bprintk_msg_only(struct trace_iterator
*iter
)
42 struct trace_seq
*s
= &iter
->seq
;
43 struct trace_entry
*entry
= iter
->ent
;
44 struct bprint_entry
*field
;
47 trace_assign_type(field
, entry
);
49 ret
= trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
51 return TRACE_TYPE_PARTIAL_LINE
;
53 return TRACE_TYPE_HANDLED
;
56 enum print_line_t
trace_print_printk_msg_only(struct trace_iterator
*iter
)
58 struct trace_seq
*s
= &iter
->seq
;
59 struct trace_entry
*entry
= iter
->ent
;
60 struct print_entry
*field
;
63 trace_assign_type(field
, entry
);
65 ret
= trace_seq_printf(s
, "%s", field
->buf
);
67 return TRACE_TYPE_PARTIAL_LINE
;
69 return TRACE_TYPE_HANDLED
;
73 * trace_seq_printf - sequence printing of trace information
74 * @s: trace sequence descriptor
75 * @fmt: printf format string
77 * It returns 0 if the trace oversizes the buffer's free
80 * The tracer may use either sequence operations or its own
81 * copy to user routines. To simplify formating of a trace
82 * trace_seq_printf is used to store strings into a special
83 * buffer (@s). Then the output may be either used by
84 * the sequencer or pulled into another buffer.
87 trace_seq_printf(struct trace_seq
*s
, const char *fmt
, ...)
89 int len
= (PAGE_SIZE
- 1) - s
->len
;
97 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, ap
);
100 /* If we can't write it all, don't bother writing anything */
110 EXPORT_SYMBOL_GPL(trace_seq_printf
);
113 * trace_seq_vprintf - sequence printing of trace information
114 * @s: trace sequence descriptor
115 * @fmt: printf format string
117 * The tracer may use either sequence operations or its own
118 * copy to user routines. To simplify formating of a trace
119 * trace_seq_printf is used to store strings into a special
120 * buffer (@s). Then the output may be either used by
121 * the sequencer or pulled into another buffer.
124 trace_seq_vprintf(struct trace_seq
*s
, const char *fmt
, va_list args
)
126 int len
= (PAGE_SIZE
- 1) - s
->len
;
132 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, args
);
134 /* If we can't write it all, don't bother writing anything */
144 EXPORT_SYMBOL_GPL(trace_seq_vprintf
);
146 int trace_seq_bprintf(struct trace_seq
*s
, const char *fmt
, const u32
*binary
)
148 int len
= (PAGE_SIZE
- 1) - s
->len
;
154 ret
= bstr_printf(s
->buffer
+ s
->len
, len
, fmt
, binary
);
156 /* If we can't write it all, don't bother writing anything */
168 * trace_seq_puts - trace sequence printing of simple string
169 * @s: trace sequence descriptor
170 * @str: simple string to record
172 * The tracer may use either the sequence operations or its own
173 * copy to user routines. This function records a simple string
174 * into a special buffer (@s) for later retrieval by a sequencer
175 * or other mechanism.
177 int trace_seq_puts(struct trace_seq
*s
, const char *str
)
179 int len
= strlen(str
);
184 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
189 memcpy(s
->buffer
+ s
->len
, str
, len
);
195 int trace_seq_putc(struct trace_seq
*s
, unsigned char c
)
200 if (s
->len
>= (PAGE_SIZE
- 1)) {
205 s
->buffer
[s
->len
++] = c
;
209 EXPORT_SYMBOL(trace_seq_putc
);
211 int trace_seq_putmem(struct trace_seq
*s
, const void *mem
, size_t len
)
216 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
221 memcpy(s
->buffer
+ s
->len
, mem
, len
);
227 int trace_seq_putmem_hex(struct trace_seq
*s
, const void *mem
, size_t len
)
229 unsigned char hex
[HEX_CHARS
];
230 const unsigned char *data
= mem
;
237 for (i
= 0, j
= 0; i
< len
; i
++) {
239 for (i
= len
-1, j
= 0; i
>= 0; i
--) {
241 hex
[j
++] = hex_asc_hi(data
[i
]);
242 hex
[j
++] = hex_asc_lo(data
[i
]);
246 return trace_seq_putmem(s
, hex
, j
);
249 void *trace_seq_reserve(struct trace_seq
*s
, size_t len
)
256 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
261 ret
= s
->buffer
+ s
->len
;
267 int trace_seq_path(struct trace_seq
*s
, struct path
*path
)
274 if (s
->len
>= (PAGE_SIZE
- 1)) {
279 p
= d_path(path
, s
->buffer
+ s
->len
, PAGE_SIZE
- s
->len
);
281 p
= mangle_path(s
->buffer
+ s
->len
, p
, "\n");
283 s
->len
= p
- s
->buffer
;
287 s
->buffer
[s
->len
++] = '?';
296 ftrace_print_flags_seq(struct trace_seq
*p
, const char *delim
,
298 const struct trace_print_flags
*flag_array
)
302 const char *ret
= p
->buffer
+ p
->len
;
305 for (i
= 0; flag_array
[i
].name
&& flags
; i
++) {
307 mask
= flag_array
[i
].mask
;
308 if ((flags
& mask
) != mask
)
311 str
= flag_array
[i
].name
;
314 trace_seq_puts(p
, delim
);
315 trace_seq_puts(p
, str
);
318 /* check for left over flags */
321 trace_seq_puts(p
, delim
);
322 trace_seq_printf(p
, "0x%lx", flags
);
325 trace_seq_putc(p
, 0);
329 EXPORT_SYMBOL(ftrace_print_flags_seq
);
332 ftrace_print_symbols_seq(struct trace_seq
*p
, unsigned long val
,
333 const struct trace_print_flags
*symbol_array
)
336 const char *ret
= p
->buffer
+ p
->len
;
338 for (i
= 0; symbol_array
[i
].name
; i
++) {
340 if (val
!= symbol_array
[i
].mask
)
343 trace_seq_puts(p
, symbol_array
[i
].name
);
348 trace_seq_printf(p
, "0x%lx", val
);
350 trace_seq_putc(p
, 0);
354 EXPORT_SYMBOL(ftrace_print_symbols_seq
);
357 ftrace_print_hex_seq(struct trace_seq
*p
, const unsigned char *buf
, int buf_len
)
360 const char *ret
= p
->buffer
+ p
->len
;
362 for (i
= 0; i
< buf_len
; i
++)
363 trace_seq_printf(p
, "%s%2.2x", i
== 0 ? "" : " ", buf
[i
]);
365 trace_seq_putc(p
, 0);
369 EXPORT_SYMBOL(ftrace_print_hex_seq
);
371 #ifdef CONFIG_KRETPROBES
372 static inline const char *kretprobed(const char *name
)
374 static const char tramp_name
[] = "kretprobe_trampoline";
375 int size
= sizeof(tramp_name
);
377 if (strncmp(tramp_name
, name
, size
) == 0)
378 return "[unknown/kretprobe'd]";
382 static inline const char *kretprobed(const char *name
)
386 #endif /* CONFIG_KRETPROBES */
389 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
391 #ifdef CONFIG_KALLSYMS
392 char str
[KSYM_SYMBOL_LEN
];
395 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
397 name
= kretprobed(str
);
399 return trace_seq_printf(s
, fmt
, name
);
405 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
406 unsigned long address
)
408 #ifdef CONFIG_KALLSYMS
409 char str
[KSYM_SYMBOL_LEN
];
412 sprint_symbol(str
, address
);
413 name
= kretprobed(str
);
415 return trace_seq_printf(s
, fmt
, name
);
421 # define IP_FMT "%08lx"
423 # define IP_FMT "%016lx"
426 int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
427 unsigned long ip
, unsigned long sym_flags
)
429 struct file
*file
= NULL
;
430 unsigned long vmstart
= 0;
437 const struct vm_area_struct
*vma
;
439 down_read(&mm
->mmap_sem
);
440 vma
= find_vma(mm
, ip
);
443 vmstart
= vma
->vm_start
;
446 ret
= trace_seq_path(s
, &file
->f_path
);
448 ret
= trace_seq_printf(s
, "[+0x%lx]",
451 up_read(&mm
->mmap_sem
);
453 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
454 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
459 seq_print_userip_objs(const struct userstack_entry
*entry
, struct trace_seq
*s
,
460 unsigned long sym_flags
)
462 struct mm_struct
*mm
= NULL
;
466 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
467 struct task_struct
*task
;
469 * we do the lookup on the thread group leader,
470 * since individual threads might have already quit!
473 task
= find_task_by_vpid(entry
->tgid
);
475 mm
= get_task_mm(task
);
479 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
480 unsigned long ip
= entry
->caller
[i
];
482 if (ip
== ULONG_MAX
|| !ret
)
485 ret
= trace_seq_puts(s
, " => ");
488 ret
= trace_seq_puts(s
, "??");
490 ret
= trace_seq_puts(s
, "\n");
496 ret
= seq_print_user_ip(s
, mm
, ip
, sym_flags
);
497 ret
= trace_seq_puts(s
, "\n");
506 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
511 return trace_seq_printf(s
, "0");
513 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
514 ret
= seq_print_sym_offset(s
, "%s", ip
);
516 ret
= seq_print_sym_short(s
, "%s", ip
);
521 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
522 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
527 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
528 * @s: trace seq struct to write to
529 * @entry: The trace entry field from the ring buffer
531 * Prints the generic fields of irqs off, in hard or softirq, preempt
534 int trace_print_lat_fmt(struct trace_seq
*s
, struct trace_entry
*entry
)
536 int hardirq
, softirq
;
539 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
540 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
542 if (!trace_seq_printf(s
, "%c%c%c",
543 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
544 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ?
546 (entry
->flags
& TRACE_FLAG_NEED_RESCHED
) ?
548 (hardirq
&& softirq
) ? 'H' :
549 hardirq
? 'h' : softirq
? 's' : '.'))
552 if (entry
->preempt_count
)
553 ret
= trace_seq_printf(s
, "%x", entry
->preempt_count
);
555 ret
= trace_seq_putc(s
, '.');
561 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
563 char comm
[TASK_COMM_LEN
];
565 trace_find_cmdline(entry
->pid
, comm
);
567 if (!trace_seq_printf(s
, "%8.8s-%-5d %3d",
568 comm
, entry
->pid
, cpu
))
571 return trace_print_lat_fmt(s
, entry
);
574 static unsigned long preempt_mark_thresh
= 100;
577 lat_print_timestamp(struct trace_seq
*s
, u64 abs_usecs
,
578 unsigned long rel_usecs
)
580 return trace_seq_printf(s
, " %4lldus%c: ", abs_usecs
,
581 rel_usecs
> preempt_mark_thresh
? '!' :
582 rel_usecs
> 1 ? '+' : ' ');
585 int trace_print_context(struct trace_iterator
*iter
)
587 struct trace_seq
*s
= &iter
->seq
;
588 struct trace_entry
*entry
= iter
->ent
;
589 unsigned long long t
= ns2usecs(iter
->ts
);
590 unsigned long usec_rem
= do_div(t
, USEC_PER_SEC
);
591 unsigned long secs
= (unsigned long)t
;
592 char comm
[TASK_COMM_LEN
];
594 trace_find_cmdline(entry
->pid
, comm
);
596 return trace_seq_printf(s
, "%16s-%-5d [%03d] %5lu.%06lu: ",
597 comm
, entry
->pid
, iter
->cpu
, secs
, usec_rem
);
600 int trace_print_lat_context(struct trace_iterator
*iter
)
604 struct trace_seq
*s
= &iter
->seq
;
605 struct trace_entry
*entry
= iter
->ent
,
606 *next_entry
= trace_find_next_entry(iter
, NULL
,
608 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
609 unsigned long abs_usecs
= ns2usecs(iter
->ts
- iter
->tr
->time_start
);
610 unsigned long rel_usecs
;
614 rel_usecs
= ns2usecs(next_ts
- iter
->ts
);
617 char comm
[TASK_COMM_LEN
];
619 trace_find_cmdline(entry
->pid
, comm
);
621 ret
= trace_seq_printf(s
, "%16s %5d %3d %d %08x %08lx [%08llx]"
622 " %ld.%03ldms (+%ld.%03ldms): ", comm
,
623 entry
->pid
, iter
->cpu
, entry
->flags
,
624 entry
->preempt_count
, iter
->idx
,
626 abs_usecs
/ USEC_PER_MSEC
,
627 abs_usecs
% USEC_PER_MSEC
,
628 rel_usecs
/ USEC_PER_MSEC
,
629 rel_usecs
% USEC_PER_MSEC
);
631 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
633 ret
= lat_print_timestamp(s
, abs_usecs
, rel_usecs
);
639 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
641 static int task_state_char(unsigned long state
)
643 int bit
= state
? __ffs(state
) + 1 : 0;
645 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
649 * ftrace_find_event - find a registered event
650 * @type: the type of event to look for
652 * Returns an event of type @type otherwise NULL
653 * Called with trace_event_read_lock() held.
655 struct trace_event
*ftrace_find_event(int type
)
657 struct trace_event
*event
;
658 struct hlist_node
*n
;
661 key
= type
& (EVENT_HASHSIZE
- 1);
663 hlist_for_each_entry(event
, n
, &event_hash
[key
], node
) {
664 if (event
->type
== type
)
671 static LIST_HEAD(ftrace_event_list
);
673 static int trace_search_list(struct list_head
**list
)
675 struct trace_event
*e
;
676 int last
= __TRACE_LAST_TYPE
;
678 if (list_empty(&ftrace_event_list
)) {
679 *list
= &ftrace_event_list
;
684 * We used up all possible max events,
685 * lets see if somebody freed one.
687 list_for_each_entry(e
, &ftrace_event_list
, list
) {
688 if (e
->type
!= last
+ 1)
693 /* Did we used up all 65 thousand events??? */
694 if ((last
+ 1) > FTRACE_MAX_EVENT
)
701 void trace_event_read_lock(void)
703 down_read(&trace_event_mutex
);
706 void trace_event_read_unlock(void)
708 up_read(&trace_event_mutex
);
712 * register_ftrace_event - register output for an event type
713 * @event: the event type to register
715 * Event types are stored in a hash and this hash is used to
716 * find a way to print an event. If the @event->type is set
717 * then it will use that type, otherwise it will assign a
720 * If you assign your own type, please make sure it is added
721 * to the trace_type enum in trace.h, to avoid collisions
722 * with the dynamic types.
724 * Returns the event type number or zero on error.
726 int register_ftrace_event(struct trace_event
*event
)
731 down_write(&trace_event_mutex
);
736 if (WARN_ON(!event
->funcs
))
739 INIT_LIST_HEAD(&event
->list
);
742 struct list_head
*list
= NULL
;
744 if (next_event_type
> FTRACE_MAX_EVENT
) {
746 event
->type
= trace_search_list(&list
);
752 event
->type
= next_event_type
++;
753 list
= &ftrace_event_list
;
756 if (WARN_ON(ftrace_find_event(event
->type
)))
759 list_add_tail(&event
->list
, list
);
761 } else if (event
->type
> __TRACE_LAST_TYPE
) {
762 printk(KERN_WARNING
"Need to add type to trace.h\n");
766 /* Is this event already used */
767 if (ftrace_find_event(event
->type
))
771 if (event
->funcs
->trace
== NULL
)
772 event
->funcs
->trace
= trace_nop_print
;
773 if (event
->funcs
->raw
== NULL
)
774 event
->funcs
->raw
= trace_nop_print
;
775 if (event
->funcs
->hex
== NULL
)
776 event
->funcs
->hex
= trace_nop_print
;
777 if (event
->funcs
->binary
== NULL
)
778 event
->funcs
->binary
= trace_nop_print
;
780 key
= event
->type
& (EVENT_HASHSIZE
- 1);
782 hlist_add_head(&event
->node
, &event_hash
[key
]);
786 up_write(&trace_event_mutex
);
790 EXPORT_SYMBOL_GPL(register_ftrace_event
);
793 * Used by module code with the trace_event_mutex held for write.
795 int __unregister_ftrace_event(struct trace_event
*event
)
797 hlist_del(&event
->node
);
798 list_del(&event
->list
);
803 * unregister_ftrace_event - remove a no longer used event
804 * @event: the event to remove
806 int unregister_ftrace_event(struct trace_event
*event
)
808 down_write(&trace_event_mutex
);
809 __unregister_ftrace_event(event
);
810 up_write(&trace_event_mutex
);
814 EXPORT_SYMBOL_GPL(unregister_ftrace_event
);
820 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
821 struct trace_event
*event
)
823 return TRACE_TYPE_HANDLED
;
827 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
828 struct trace_event
*event
)
830 struct ftrace_entry
*field
;
831 struct trace_seq
*s
= &iter
->seq
;
833 trace_assign_type(field
, iter
->ent
);
835 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
838 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
839 if (!trace_seq_printf(s
, " <-"))
841 if (!seq_print_ip_sym(s
,
846 if (!trace_seq_printf(s
, "\n"))
849 return TRACE_TYPE_HANDLED
;
852 return TRACE_TYPE_PARTIAL_LINE
;
855 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
856 struct trace_event
*event
)
858 struct ftrace_entry
*field
;
860 trace_assign_type(field
, iter
->ent
);
862 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
865 return TRACE_TYPE_PARTIAL_LINE
;
867 return TRACE_TYPE_HANDLED
;
870 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
871 struct trace_event
*event
)
873 struct ftrace_entry
*field
;
874 struct trace_seq
*s
= &iter
->seq
;
876 trace_assign_type(field
, iter
->ent
);
878 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
879 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
881 return TRACE_TYPE_HANDLED
;
884 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
885 struct trace_event
*event
)
887 struct ftrace_entry
*field
;
888 struct trace_seq
*s
= &iter
->seq
;
890 trace_assign_type(field
, iter
->ent
);
892 SEQ_PUT_FIELD_RET(s
, field
->ip
);
893 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
895 return TRACE_TYPE_HANDLED
;
898 static struct trace_event_functions trace_fn_funcs
= {
899 .trace
= trace_fn_trace
,
902 .binary
= trace_fn_bin
,
905 static struct trace_event trace_fn_event
= {
907 .funcs
= &trace_fn_funcs
,
910 /* TRACE_CTX an TRACE_WAKE */
911 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
914 struct ctx_switch_entry
*field
;
915 char comm
[TASK_COMM_LEN
];
919 trace_assign_type(field
, iter
->ent
);
921 T
= task_state_char(field
->next_state
);
922 S
= task_state_char(field
->prev_state
);
923 trace_find_cmdline(field
->next_pid
, comm
);
924 if (!trace_seq_printf(&iter
->seq
,
925 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
933 return TRACE_TYPE_PARTIAL_LINE
;
935 return TRACE_TYPE_HANDLED
;
938 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
939 struct trace_event
*event
)
941 return trace_ctxwake_print(iter
, "==>");
944 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
945 int flags
, struct trace_event
*event
)
947 return trace_ctxwake_print(iter
, " +");
950 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
952 struct ctx_switch_entry
*field
;
955 trace_assign_type(field
, iter
->ent
);
958 S
= task_state_char(field
->prev_state
);
959 T
= task_state_char(field
->next_state
);
960 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
968 return TRACE_TYPE_PARTIAL_LINE
;
970 return TRACE_TYPE_HANDLED
;
973 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
974 struct trace_event
*event
)
976 return trace_ctxwake_raw(iter
, 0);
979 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
980 struct trace_event
*event
)
982 return trace_ctxwake_raw(iter
, '+');
986 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
988 struct ctx_switch_entry
*field
;
989 struct trace_seq
*s
= &iter
->seq
;
992 trace_assign_type(field
, iter
->ent
);
995 S
= task_state_char(field
->prev_state
);
996 T
= task_state_char(field
->next_state
);
998 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
999 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
1000 SEQ_PUT_HEX_FIELD_RET(s
, S
);
1001 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
1002 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
1003 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
1004 SEQ_PUT_HEX_FIELD_RET(s
, T
);
1006 return TRACE_TYPE_HANDLED
;
1009 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
1010 struct trace_event
*event
)
1012 return trace_ctxwake_hex(iter
, 0);
1015 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
1016 struct trace_event
*event
)
1018 return trace_ctxwake_hex(iter
, '+');
1021 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
1022 int flags
, struct trace_event
*event
)
1024 struct ctx_switch_entry
*field
;
1025 struct trace_seq
*s
= &iter
->seq
;
1027 trace_assign_type(field
, iter
->ent
);
1029 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
1030 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
1031 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
1032 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
1033 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
1034 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
1036 return TRACE_TYPE_HANDLED
;
1039 static struct trace_event_functions trace_ctx_funcs
= {
1040 .trace
= trace_ctx_print
,
1041 .raw
= trace_ctx_raw
,
1042 .hex
= trace_ctx_hex
,
1043 .binary
= trace_ctxwake_bin
,
1046 static struct trace_event trace_ctx_event
= {
1048 .funcs
= &trace_ctx_funcs
,
1051 static struct trace_event_functions trace_wake_funcs
= {
1052 .trace
= trace_wake_print
,
1053 .raw
= trace_wake_raw
,
1054 .hex
= trace_wake_hex
,
1055 .binary
= trace_ctxwake_bin
,
1058 static struct trace_event trace_wake_event
= {
1060 .funcs
= &trace_wake_funcs
,
1065 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1066 int flags
, struct trace_event
*event
)
1068 struct stack_entry
*field
;
1069 struct trace_seq
*s
= &iter
->seq
;
1072 trace_assign_type(field
, iter
->ent
);
1074 if (!trace_seq_puts(s
, "<stack trace>\n"))
1076 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
1077 if (!field
->caller
[i
] || (field
->caller
[i
] == ULONG_MAX
))
1079 if (!trace_seq_puts(s
, " => "))
1082 if (!seq_print_ip_sym(s
, field
->caller
[i
], flags
))
1084 if (!trace_seq_puts(s
, "\n"))
1088 return TRACE_TYPE_HANDLED
;
1091 return TRACE_TYPE_PARTIAL_LINE
;
1094 static struct trace_event_functions trace_stack_funcs
= {
1095 .trace
= trace_stack_print
,
1098 static struct trace_event trace_stack_event
= {
1099 .type
= TRACE_STACK
,
1100 .funcs
= &trace_stack_funcs
,
1103 /* TRACE_USER_STACK */
1104 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1105 int flags
, struct trace_event
*event
)
1107 struct userstack_entry
*field
;
1108 struct trace_seq
*s
= &iter
->seq
;
1110 trace_assign_type(field
, iter
->ent
);
1112 if (!trace_seq_puts(s
, "<user stack trace>\n"))
1115 if (!seq_print_userip_objs(field
, s
, flags
))
1118 return TRACE_TYPE_HANDLED
;
1121 return TRACE_TYPE_PARTIAL_LINE
;
1124 static struct trace_event_functions trace_user_stack_funcs
= {
1125 .trace
= trace_user_stack_print
,
1128 static struct trace_event trace_user_stack_event
= {
1129 .type
= TRACE_USER_STACK
,
1130 .funcs
= &trace_user_stack_funcs
,
1134 static enum print_line_t
1135 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1136 struct trace_event
*event
)
1138 struct trace_entry
*entry
= iter
->ent
;
1139 struct trace_seq
*s
= &iter
->seq
;
1140 struct bprint_entry
*field
;
1142 trace_assign_type(field
, entry
);
1144 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1147 if (!trace_seq_puts(s
, ": "))
1150 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1153 return TRACE_TYPE_HANDLED
;
1156 return TRACE_TYPE_PARTIAL_LINE
;
1160 static enum print_line_t
1161 trace_bprint_raw(struct trace_iterator
*iter
, int flags
,
1162 struct trace_event
*event
)
1164 struct bprint_entry
*field
;
1165 struct trace_seq
*s
= &iter
->seq
;
1167 trace_assign_type(field
, iter
->ent
);
1169 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
1172 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1175 return TRACE_TYPE_HANDLED
;
1178 return TRACE_TYPE_PARTIAL_LINE
;
1181 static struct trace_event_functions trace_bprint_funcs
= {
1182 .trace
= trace_bprint_print
,
1183 .raw
= trace_bprint_raw
,
1186 static struct trace_event trace_bprint_event
= {
1187 .type
= TRACE_BPRINT
,
1188 .funcs
= &trace_bprint_funcs
,
1192 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1193 int flags
, struct trace_event
*event
)
1195 struct print_entry
*field
;
1196 struct trace_seq
*s
= &iter
->seq
;
1198 trace_assign_type(field
, iter
->ent
);
1200 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1203 if (!trace_seq_printf(s
, ": %s", field
->buf
))
1206 return TRACE_TYPE_HANDLED
;
1209 return TRACE_TYPE_PARTIAL_LINE
;
1212 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1213 struct trace_event
*event
)
1215 struct print_entry
*field
;
1217 trace_assign_type(field
, iter
->ent
);
1219 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
1222 return TRACE_TYPE_HANDLED
;
1225 return TRACE_TYPE_PARTIAL_LINE
;
1228 static struct trace_event_functions trace_print_funcs
= {
1229 .trace
= trace_print_print
,
1230 .raw
= trace_print_raw
,
1233 static struct trace_event trace_print_event
= {
1234 .type
= TRACE_PRINT
,
1235 .funcs
= &trace_print_funcs
,
1239 static struct trace_event
*events
[] __initdata
= {
1244 &trace_user_stack_event
,
1245 &trace_bprint_event
,
1250 __init
static int init_events(void)
1252 struct trace_event
*event
;
1255 for (i
= 0; events
[i
]; i
++) {
1258 ret
= register_ftrace_event(event
);
1260 printk(KERN_WARNING
"event %d failed to register\n",
1268 device_initcall(init_events
);