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 static DEFINE_MUTEX(trace_event_mutex
);
18 static struct hlist_head event_hash
[EVENT_HASHSIZE
] __read_mostly
;
20 static int next_event_type
= __TRACE_LAST_TYPE
+ 1;
22 enum print_line_t
trace_print_bprintk_msg_only(struct trace_iterator
*iter
)
24 struct trace_seq
*s
= &iter
->seq
;
25 struct trace_entry
*entry
= iter
->ent
;
26 struct bprint_entry
*field
;
29 trace_assign_type(field
, entry
);
31 ret
= trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
33 return TRACE_TYPE_PARTIAL_LINE
;
35 return TRACE_TYPE_HANDLED
;
38 enum print_line_t
trace_print_printk_msg_only(struct trace_iterator
*iter
)
40 struct trace_seq
*s
= &iter
->seq
;
41 struct trace_entry
*entry
= iter
->ent
;
42 struct print_entry
*field
;
45 trace_assign_type(field
, entry
);
47 ret
= trace_seq_printf(s
, "%s", field
->buf
);
49 return TRACE_TYPE_PARTIAL_LINE
;
51 return TRACE_TYPE_HANDLED
;
55 * trace_seq_printf - sequence printing of trace information
56 * @s: trace sequence descriptor
57 * @fmt: printf format string
59 * The tracer may use either sequence operations or its own
60 * copy to user routines. To simplify formating of a trace
61 * trace_seq_printf is used to store strings into a special
62 * buffer (@s). Then the output may be either used by
63 * the sequencer or pulled into another buffer.
66 trace_seq_printf(struct trace_seq
*s
, const char *fmt
, ...)
68 int len
= (PAGE_SIZE
- 1) - s
->len
;
76 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, ap
);
79 /* If we can't write it all, don't bother writing anything */
88 int trace_seq_bprintf(struct trace_seq
*s
, const char *fmt
, const u32
*binary
)
90 int len
= (PAGE_SIZE
- 1) - s
->len
;
96 ret
= bstr_printf(s
->buffer
+ s
->len
, len
, fmt
, binary
);
98 /* If we can't write it all, don't bother writing anything */
108 * trace_seq_puts - trace sequence printing of simple string
109 * @s: trace sequence descriptor
110 * @str: simple string to record
112 * The tracer may use either the sequence operations or its own
113 * copy to user routines. This function records a simple string
114 * into a special buffer (@s) for later retrieval by a sequencer
115 * or other mechanism.
117 int trace_seq_puts(struct trace_seq
*s
, const char *str
)
119 int len
= strlen(str
);
121 if (len
> ((PAGE_SIZE
- 1) - s
->len
))
124 memcpy(s
->buffer
+ s
->len
, str
, len
);
130 int trace_seq_putc(struct trace_seq
*s
, unsigned char c
)
132 if (s
->len
>= (PAGE_SIZE
- 1))
135 s
->buffer
[s
->len
++] = c
;
140 int trace_seq_putmem(struct trace_seq
*s
, const void *mem
, size_t len
)
142 if (len
> ((PAGE_SIZE
- 1) - s
->len
))
145 memcpy(s
->buffer
+ s
->len
, mem
, len
);
151 int trace_seq_putmem_hex(struct trace_seq
*s
, const void *mem
, size_t len
)
153 unsigned char hex
[HEX_CHARS
];
154 const unsigned char *data
= mem
;
158 for (i
= 0, j
= 0; i
< len
; i
++) {
160 for (i
= len
-1, j
= 0; i
>= 0; i
--) {
162 hex
[j
++] = hex_asc_hi(data
[i
]);
163 hex
[j
++] = hex_asc_lo(data
[i
]);
167 return trace_seq_putmem(s
, hex
, j
);
170 void *trace_seq_reserve(struct trace_seq
*s
, size_t len
)
174 if (len
> ((PAGE_SIZE
- 1) - s
->len
))
177 ret
= s
->buffer
+ s
->len
;
183 int trace_seq_path(struct trace_seq
*s
, struct path
*path
)
187 if (s
->len
>= (PAGE_SIZE
- 1))
189 p
= d_path(path
, s
->buffer
+ s
->len
, PAGE_SIZE
- s
->len
);
191 p
= mangle_path(s
->buffer
+ s
->len
, p
, "\n");
193 s
->len
= p
- s
->buffer
;
197 s
->buffer
[s
->len
++] = '?';
204 #ifdef CONFIG_KRETPROBES
205 static inline const char *kretprobed(const char *name
)
207 static const char tramp_name
[] = "kretprobe_trampoline";
208 int size
= sizeof(tramp_name
);
210 if (strncmp(tramp_name
, name
, size
) == 0)
211 return "[unknown/kretprobe'd]";
215 static inline const char *kretprobed(const char *name
)
219 #endif /* CONFIG_KRETPROBES */
222 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
224 #ifdef CONFIG_KALLSYMS
225 char str
[KSYM_SYMBOL_LEN
];
228 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
230 name
= kretprobed(str
);
232 return trace_seq_printf(s
, fmt
, name
);
238 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
239 unsigned long address
)
241 #ifdef CONFIG_KALLSYMS
242 char str
[KSYM_SYMBOL_LEN
];
245 sprint_symbol(str
, address
);
246 name
= kretprobed(str
);
248 return trace_seq_printf(s
, fmt
, name
);
254 # define IP_FMT "%08lx"
256 # define IP_FMT "%016lx"
259 int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
260 unsigned long ip
, unsigned long sym_flags
)
262 struct file
*file
= NULL
;
263 unsigned long vmstart
= 0;
267 const struct vm_area_struct
*vma
;
269 down_read(&mm
->mmap_sem
);
270 vma
= find_vma(mm
, ip
);
273 vmstart
= vma
->vm_start
;
276 ret
= trace_seq_path(s
, &file
->f_path
);
278 ret
= trace_seq_printf(s
, "[+0x%lx]",
281 up_read(&mm
->mmap_sem
);
283 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
284 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
289 seq_print_userip_objs(const struct userstack_entry
*entry
, struct trace_seq
*s
,
290 unsigned long sym_flags
)
292 struct mm_struct
*mm
= NULL
;
296 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
297 struct task_struct
*task
;
299 * we do the lookup on the thread group leader,
300 * since individual threads might have already quit!
303 task
= find_task_by_vpid(entry
->ent
.tgid
);
305 mm
= get_task_mm(task
);
309 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
310 unsigned long ip
= entry
->caller
[i
];
312 if (ip
== ULONG_MAX
|| !ret
)
315 ret
= trace_seq_puts(s
, " <- ");
318 ret
= trace_seq_puts(s
, "??");
324 ret
= seq_print_user_ip(s
, mm
, ip
, sym_flags
);
333 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
338 return trace_seq_printf(s
, "0");
340 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
341 ret
= seq_print_sym_offset(s
, "%s", ip
);
343 ret
= seq_print_sym_short(s
, "%s", ip
);
348 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
349 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
354 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
356 int hardirq
, softirq
;
357 char comm
[TASK_COMM_LEN
];
359 trace_find_cmdline(entry
->pid
, comm
);
360 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
361 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
363 if (!trace_seq_printf(s
, "%8.8s-%-5d %3d%c%c%c",
364 comm
, entry
->pid
, cpu
,
365 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
366 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ?
368 (entry
->flags
& TRACE_FLAG_NEED_RESCHED
) ?
370 (hardirq
&& softirq
) ? 'H' :
371 hardirq
? 'h' : softirq
? 's' : '.'))
374 if (entry
->preempt_count
)
375 return trace_seq_printf(s
, "%x", entry
->preempt_count
);
376 return trace_seq_puts(s
, ".");
379 static unsigned long preempt_mark_thresh
= 100;
382 lat_print_timestamp(struct trace_seq
*s
, u64 abs_usecs
,
383 unsigned long rel_usecs
)
385 return trace_seq_printf(s
, " %4lldus%c: ", abs_usecs
,
386 rel_usecs
> preempt_mark_thresh
? '!' :
387 rel_usecs
> 1 ? '+' : ' ');
390 int trace_print_context(struct trace_iterator
*iter
)
392 struct trace_seq
*s
= &iter
->seq
;
393 struct trace_entry
*entry
= iter
->ent
;
394 unsigned long long t
= ns2usecs(iter
->ts
);
395 unsigned long usec_rem
= do_div(t
, USEC_PER_SEC
);
396 unsigned long secs
= (unsigned long)t
;
397 char comm
[TASK_COMM_LEN
];
399 trace_find_cmdline(entry
->pid
, comm
);
401 return trace_seq_printf(s
, "%16s-%-5d [%03d] %5lu.%06lu: ",
402 comm
, entry
->pid
, iter
->cpu
, secs
, usec_rem
);
405 int trace_print_lat_context(struct trace_iterator
*iter
)
409 struct trace_seq
*s
= &iter
->seq
;
410 struct trace_entry
*entry
= iter
->ent
,
411 *next_entry
= trace_find_next_entry(iter
, NULL
,
413 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
414 unsigned long abs_usecs
= ns2usecs(iter
->ts
- iter
->tr
->time_start
);
415 unsigned long rel_usecs
;
419 rel_usecs
= ns2usecs(next_ts
- iter
->ts
);
422 char comm
[TASK_COMM_LEN
];
424 trace_find_cmdline(entry
->pid
, comm
);
426 ret
= trace_seq_printf(s
, "%16s %5d %3d %d %08x %08lx [%08llx]"
427 " %ld.%03ldms (+%ld.%03ldms): ", comm
,
428 entry
->pid
, iter
->cpu
, entry
->flags
,
429 entry
->preempt_count
, iter
->idx
,
431 abs_usecs
/ USEC_PER_MSEC
,
432 abs_usecs
% USEC_PER_MSEC
,
433 rel_usecs
/ USEC_PER_MSEC
,
434 rel_usecs
% USEC_PER_MSEC
);
436 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
438 ret
= lat_print_timestamp(s
, abs_usecs
, rel_usecs
);
444 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
446 static int task_state_char(unsigned long state
)
448 int bit
= state
? __ffs(state
) + 1 : 0;
450 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
454 * ftrace_find_event - find a registered event
455 * @type: the type of event to look for
457 * Returns an event of type @type otherwise NULL
459 struct trace_event
*ftrace_find_event(int type
)
461 struct trace_event
*event
;
462 struct hlist_node
*n
;
465 key
= type
& (EVENT_HASHSIZE
- 1);
467 hlist_for_each_entry_rcu(event
, n
, &event_hash
[key
], node
) {
468 if (event
->type
== type
)
476 * register_ftrace_event - register output for an event type
477 * @event: the event type to register
479 * Event types are stored in a hash and this hash is used to
480 * find a way to print an event. If the @event->type is set
481 * then it will use that type, otherwise it will assign a
484 * If you assign your own type, please make sure it is added
485 * to the trace_type enum in trace.h, to avoid collisions
486 * with the dynamic types.
488 * Returns the event type number or zero on error.
490 int register_ftrace_event(struct trace_event
*event
)
495 mutex_lock(&trace_event_mutex
);
498 ret
= next_event_type
++;
503 event
->type
= next_event_type
++;
504 else if (event
->type
> __TRACE_LAST_TYPE
) {
505 printk(KERN_WARNING
"Need to add type to trace.h\n");
509 if (ftrace_find_event(event
->type
))
512 if (event
->trace
== NULL
)
513 event
->trace
= trace_nop_print
;
514 if (event
->raw
== NULL
)
515 event
->raw
= trace_nop_print
;
516 if (event
->hex
== NULL
)
517 event
->hex
= trace_nop_print
;
518 if (event
->binary
== NULL
)
519 event
->binary
= trace_nop_print
;
521 key
= event
->type
& (EVENT_HASHSIZE
- 1);
523 hlist_add_head_rcu(&event
->node
, &event_hash
[key
]);
527 mutex_unlock(&trace_event_mutex
);
533 * unregister_ftrace_event - remove a no longer used event
534 * @event: the event to remove
536 int unregister_ftrace_event(struct trace_event
*event
)
538 mutex_lock(&trace_event_mutex
);
539 hlist_del(&event
->node
);
540 mutex_unlock(&trace_event_mutex
);
549 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
)
551 return TRACE_TYPE_HANDLED
;
555 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
)
557 struct ftrace_entry
*field
;
558 struct trace_seq
*s
= &iter
->seq
;
560 trace_assign_type(field
, iter
->ent
);
562 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
565 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
566 if (!trace_seq_printf(s
, " <-"))
568 if (!seq_print_ip_sym(s
,
573 if (!trace_seq_printf(s
, "\n"))
576 return TRACE_TYPE_HANDLED
;
579 return TRACE_TYPE_PARTIAL_LINE
;
582 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
)
584 struct ftrace_entry
*field
;
586 trace_assign_type(field
, iter
->ent
);
588 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
591 return TRACE_TYPE_PARTIAL_LINE
;
593 return TRACE_TYPE_HANDLED
;
596 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
)
598 struct ftrace_entry
*field
;
599 struct trace_seq
*s
= &iter
->seq
;
601 trace_assign_type(field
, iter
->ent
);
603 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
604 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
606 return TRACE_TYPE_HANDLED
;
609 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
)
611 struct ftrace_entry
*field
;
612 struct trace_seq
*s
= &iter
->seq
;
614 trace_assign_type(field
, iter
->ent
);
616 SEQ_PUT_FIELD_RET(s
, field
->ip
);
617 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
619 return TRACE_TYPE_HANDLED
;
622 static struct trace_event trace_fn_event
= {
624 .trace
= trace_fn_trace
,
627 .binary
= trace_fn_bin
,
630 /* TRACE_CTX an TRACE_WAKE */
631 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
634 struct ctx_switch_entry
*field
;
635 char comm
[TASK_COMM_LEN
];
639 trace_assign_type(field
, iter
->ent
);
641 T
= task_state_char(field
->next_state
);
642 S
= task_state_char(field
->prev_state
);
643 trace_find_cmdline(field
->next_pid
, comm
);
644 if (!trace_seq_printf(&iter
->seq
,
645 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
653 return TRACE_TYPE_PARTIAL_LINE
;
655 return TRACE_TYPE_HANDLED
;
658 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
)
660 return trace_ctxwake_print(iter
, "==>");
663 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
666 return trace_ctxwake_print(iter
, " +");
669 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
671 struct ctx_switch_entry
*field
;
674 trace_assign_type(field
, iter
->ent
);
677 task_state_char(field
->prev_state
);
678 T
= task_state_char(field
->next_state
);
679 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
687 return TRACE_TYPE_PARTIAL_LINE
;
689 return TRACE_TYPE_HANDLED
;
692 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
)
694 return trace_ctxwake_raw(iter
, 0);
697 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
)
699 return trace_ctxwake_raw(iter
, '+');
703 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
705 struct ctx_switch_entry
*field
;
706 struct trace_seq
*s
= &iter
->seq
;
709 trace_assign_type(field
, iter
->ent
);
712 task_state_char(field
->prev_state
);
713 T
= task_state_char(field
->next_state
);
715 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
716 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
717 SEQ_PUT_HEX_FIELD_RET(s
, S
);
718 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
719 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
720 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
721 SEQ_PUT_HEX_FIELD_RET(s
, T
);
723 return TRACE_TYPE_HANDLED
;
726 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
)
728 return trace_ctxwake_hex(iter
, 0);
731 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
)
733 return trace_ctxwake_hex(iter
, '+');
736 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
739 struct ctx_switch_entry
*field
;
740 struct trace_seq
*s
= &iter
->seq
;
742 trace_assign_type(field
, iter
->ent
);
744 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
745 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
746 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
747 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
748 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
749 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
751 return TRACE_TYPE_HANDLED
;
754 static struct trace_event trace_ctx_event
= {
756 .trace
= trace_ctx_print
,
757 .raw
= trace_ctx_raw
,
758 .hex
= trace_ctx_hex
,
759 .binary
= trace_ctxwake_bin
,
762 static struct trace_event trace_wake_event
= {
764 .trace
= trace_wake_print
,
765 .raw
= trace_wake_raw
,
766 .hex
= trace_wake_hex
,
767 .binary
= trace_ctxwake_bin
,
771 static enum print_line_t
trace_special_print(struct trace_iterator
*iter
,
774 struct special_entry
*field
;
776 trace_assign_type(field
, iter
->ent
);
778 if (!trace_seq_printf(&iter
->seq
, "# %ld %ld %ld\n",
782 return TRACE_TYPE_PARTIAL_LINE
;
784 return TRACE_TYPE_HANDLED
;
787 static enum print_line_t
trace_special_hex(struct trace_iterator
*iter
,
790 struct special_entry
*field
;
791 struct trace_seq
*s
= &iter
->seq
;
793 trace_assign_type(field
, iter
->ent
);
795 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg1
);
796 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg2
);
797 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg3
);
799 return TRACE_TYPE_HANDLED
;
802 static enum print_line_t
trace_special_bin(struct trace_iterator
*iter
,
805 struct special_entry
*field
;
806 struct trace_seq
*s
= &iter
->seq
;
808 trace_assign_type(field
, iter
->ent
);
810 SEQ_PUT_FIELD_RET(s
, field
->arg1
);
811 SEQ_PUT_FIELD_RET(s
, field
->arg2
);
812 SEQ_PUT_FIELD_RET(s
, field
->arg3
);
814 return TRACE_TYPE_HANDLED
;
817 static struct trace_event trace_special_event
= {
818 .type
= TRACE_SPECIAL
,
819 .trace
= trace_special_print
,
820 .raw
= trace_special_print
,
821 .hex
= trace_special_hex
,
822 .binary
= trace_special_bin
,
827 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
830 struct stack_entry
*field
;
831 struct trace_seq
*s
= &iter
->seq
;
834 trace_assign_type(field
, iter
->ent
);
836 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
838 if (!trace_seq_puts(s
, " <= "))
841 if (!seq_print_ip_sym(s
, field
->caller
[i
], flags
))
844 if (!trace_seq_puts(s
, "\n"))
848 return TRACE_TYPE_HANDLED
;
851 return TRACE_TYPE_PARTIAL_LINE
;
854 static struct trace_event trace_stack_event
= {
856 .trace
= trace_stack_print
,
857 .raw
= trace_special_print
,
858 .hex
= trace_special_hex
,
859 .binary
= trace_special_bin
,
862 /* TRACE_USER_STACK */
863 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
866 struct userstack_entry
*field
;
867 struct trace_seq
*s
= &iter
->seq
;
869 trace_assign_type(field
, iter
->ent
);
871 if (!seq_print_userip_objs(field
, s
, flags
))
874 if (!trace_seq_putc(s
, '\n'))
877 return TRACE_TYPE_HANDLED
;
880 return TRACE_TYPE_PARTIAL_LINE
;
883 static struct trace_event trace_user_stack_event
= {
884 .type
= TRACE_USER_STACK
,
885 .trace
= trace_user_stack_print
,
886 .raw
= trace_special_print
,
887 .hex
= trace_special_hex
,
888 .binary
= trace_special_bin
,
892 static enum print_line_t
893 trace_bprint_print(struct trace_iterator
*iter
, int flags
)
895 struct trace_entry
*entry
= iter
->ent
;
896 struct trace_seq
*s
= &iter
->seq
;
897 struct bprint_entry
*field
;
899 trace_assign_type(field
, entry
);
901 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
904 if (!trace_seq_puts(s
, ": "))
907 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
910 return TRACE_TYPE_HANDLED
;
913 return TRACE_TYPE_PARTIAL_LINE
;
917 static enum print_line_t
918 trace_bprint_raw(struct trace_iterator
*iter
, int flags
)
920 struct bprint_entry
*field
;
921 struct trace_seq
*s
= &iter
->seq
;
923 trace_assign_type(field
, iter
->ent
);
925 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
928 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
931 return TRACE_TYPE_HANDLED
;
934 return TRACE_TYPE_PARTIAL_LINE
;
938 static struct trace_event trace_bprint_event
= {
939 .type
= TRACE_BPRINT
,
940 .trace
= trace_bprint_print
,
941 .raw
= trace_bprint_raw
,
945 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
948 struct print_entry
*field
;
949 struct trace_seq
*s
= &iter
->seq
;
951 trace_assign_type(field
, iter
->ent
);
953 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
956 if (!trace_seq_printf(s
, ": %s", field
->buf
))
959 return TRACE_TYPE_HANDLED
;
962 return TRACE_TYPE_PARTIAL_LINE
;
965 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
)
967 struct print_entry
*field
;
969 trace_assign_type(field
, iter
->ent
);
971 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
974 return TRACE_TYPE_HANDLED
;
977 return TRACE_TYPE_PARTIAL_LINE
;
980 static struct trace_event trace_print_event
= {
982 .trace
= trace_print_print
,
983 .raw
= trace_print_raw
,
987 static struct trace_event
*events
[] __initdata
= {
991 &trace_special_event
,
993 &trace_user_stack_event
,
999 __init
static int init_events(void)
1001 struct trace_event
*event
;
1004 for (i
= 0; events
[i
]; i
++) {
1007 ret
= register_ftrace_event(event
);
1009 printk(KERN_WARNING
"event %d failed to register\n",
1017 device_initcall(init_events
);