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
, 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
, void *mem
, size_t len
)
153 unsigned char hex
[HEX_CHARS
];
154 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 int trace_seq_path(struct trace_seq
*s
, struct path
*path
)
174 if (s
->len
>= (PAGE_SIZE
- 1))
176 p
= d_path(path
, s
->buffer
+ s
->len
, PAGE_SIZE
- s
->len
);
178 p
= mangle_path(s
->buffer
+ s
->len
, p
, "\n");
180 s
->len
= p
- s
->buffer
;
184 s
->buffer
[s
->len
++] = '?';
191 #ifdef CONFIG_KRETPROBES
192 static inline const char *kretprobed(const char *name
)
194 static const char tramp_name
[] = "kretprobe_trampoline";
195 int size
= sizeof(tramp_name
);
197 if (strncmp(tramp_name
, name
, size
) == 0)
198 return "[unknown/kretprobe'd]";
202 static inline const char *kretprobed(const char *name
)
206 #endif /* CONFIG_KRETPROBES */
209 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
211 #ifdef CONFIG_KALLSYMS
212 char str
[KSYM_SYMBOL_LEN
];
215 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
217 name
= kretprobed(str
);
219 return trace_seq_printf(s
, fmt
, name
);
225 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
226 unsigned long address
)
228 #ifdef CONFIG_KALLSYMS
229 char str
[KSYM_SYMBOL_LEN
];
232 sprint_symbol(str
, address
);
233 name
= kretprobed(str
);
235 return trace_seq_printf(s
, fmt
, name
);
241 # define IP_FMT "%08lx"
243 # define IP_FMT "%016lx"
246 int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
247 unsigned long ip
, unsigned long sym_flags
)
249 struct file
*file
= NULL
;
250 unsigned long vmstart
= 0;
254 const struct vm_area_struct
*vma
;
256 down_read(&mm
->mmap_sem
);
257 vma
= find_vma(mm
, ip
);
260 vmstart
= vma
->vm_start
;
263 ret
= trace_seq_path(s
, &file
->f_path
);
265 ret
= trace_seq_printf(s
, "[+0x%lx]",
268 up_read(&mm
->mmap_sem
);
270 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
271 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
276 seq_print_userip_objs(const struct userstack_entry
*entry
, struct trace_seq
*s
,
277 unsigned long sym_flags
)
279 struct mm_struct
*mm
= NULL
;
283 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
284 struct task_struct
*task
;
286 * we do the lookup on the thread group leader,
287 * since individual threads might have already quit!
290 task
= find_task_by_vpid(entry
->ent
.tgid
);
292 mm
= get_task_mm(task
);
296 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
297 unsigned long ip
= entry
->caller
[i
];
299 if (ip
== ULONG_MAX
|| !ret
)
302 ret
= trace_seq_puts(s
, " <- ");
305 ret
= trace_seq_puts(s
, "??");
311 ret
= seq_print_user_ip(s
, mm
, ip
, sym_flags
);
320 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
325 return trace_seq_printf(s
, "0");
327 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
328 ret
= seq_print_sym_offset(s
, "%s", ip
);
330 ret
= seq_print_sym_short(s
, "%s", ip
);
335 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
336 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
341 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
343 int hardirq
, softirq
;
344 char comm
[TASK_COMM_LEN
];
346 trace_find_cmdline(entry
->pid
, comm
);
347 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
348 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
350 if (!trace_seq_printf(s
, "%8.8s-%-5d %3d%c%c%c",
351 comm
, entry
->pid
, cpu
,
352 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
353 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ?
355 (entry
->flags
& TRACE_FLAG_NEED_RESCHED
) ?
357 (hardirq
&& softirq
) ? 'H' :
358 hardirq
? 'h' : softirq
? 's' : '.'))
361 if (entry
->preempt_count
)
362 return trace_seq_printf(s
, "%x", entry
->preempt_count
);
363 return trace_seq_puts(s
, ".");
366 static unsigned long preempt_mark_thresh
= 100;
369 lat_print_timestamp(struct trace_seq
*s
, u64 abs_usecs
,
370 unsigned long rel_usecs
)
372 return trace_seq_printf(s
, " %4lldus%c: ", abs_usecs
,
373 rel_usecs
> preempt_mark_thresh
? '!' :
374 rel_usecs
> 1 ? '+' : ' ');
377 int trace_print_context(struct trace_iterator
*iter
)
379 struct trace_seq
*s
= &iter
->seq
;
380 struct trace_entry
*entry
= iter
->ent
;
381 unsigned long long t
= ns2usecs(iter
->ts
);
382 unsigned long usec_rem
= do_div(t
, USEC_PER_SEC
);
383 unsigned long secs
= (unsigned long)t
;
384 char comm
[TASK_COMM_LEN
];
386 trace_find_cmdline(entry
->pid
, comm
);
388 return trace_seq_printf(s
, "%16s-%-5d [%03d] %5lu.%06lu: ",
389 comm
, entry
->pid
, iter
->cpu
, secs
, usec_rem
);
392 int trace_print_lat_context(struct trace_iterator
*iter
)
396 struct trace_seq
*s
= &iter
->seq
;
397 struct trace_entry
*entry
= iter
->ent
,
398 *next_entry
= trace_find_next_entry(iter
, NULL
,
400 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
401 unsigned long abs_usecs
= ns2usecs(iter
->ts
- iter
->tr
->time_start
);
402 unsigned long rel_usecs
;
406 rel_usecs
= ns2usecs(next_ts
- iter
->ts
);
409 char comm
[TASK_COMM_LEN
];
411 trace_find_cmdline(entry
->pid
, comm
);
413 ret
= trace_seq_printf(s
, "%16s %5d %3d %d %08x %08lx [%08lx]"
414 " %ld.%03ldms (+%ld.%03ldms): ", comm
,
415 entry
->pid
, iter
->cpu
, entry
->flags
,
416 entry
->preempt_count
, iter
->idx
,
418 abs_usecs
/ USEC_PER_MSEC
,
419 abs_usecs
% USEC_PER_MSEC
,
420 rel_usecs
/ USEC_PER_MSEC
,
421 rel_usecs
% USEC_PER_MSEC
);
423 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
425 ret
= lat_print_timestamp(s
, abs_usecs
, rel_usecs
);
431 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
433 static int task_state_char(unsigned long state
)
435 int bit
= state
? __ffs(state
) + 1 : 0;
437 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
441 * ftrace_find_event - find a registered event
442 * @type: the type of event to look for
444 * Returns an event of type @type otherwise NULL
446 struct trace_event
*ftrace_find_event(int type
)
448 struct trace_event
*event
;
449 struct hlist_node
*n
;
452 key
= type
& (EVENT_HASHSIZE
- 1);
454 hlist_for_each_entry_rcu(event
, n
, &event_hash
[key
], node
) {
455 if (event
->type
== type
)
463 * register_ftrace_event - register output for an event type
464 * @event: the event type to register
466 * Event types are stored in a hash and this hash is used to
467 * find a way to print an event. If the @event->type is set
468 * then it will use that type, otherwise it will assign a
471 * If you assign your own type, please make sure it is added
472 * to the trace_type enum in trace.h, to avoid collisions
473 * with the dynamic types.
475 * Returns the event type number or zero on error.
477 int register_ftrace_event(struct trace_event
*event
)
482 mutex_lock(&trace_event_mutex
);
485 ret
= next_event_type
++;
490 event
->type
= next_event_type
++;
491 else if (event
->type
> __TRACE_LAST_TYPE
) {
492 printk(KERN_WARNING
"Need to add type to trace.h\n");
496 if (ftrace_find_event(event
->type
))
499 if (event
->trace
== NULL
)
500 event
->trace
= trace_nop_print
;
501 if (event
->raw
== NULL
)
502 event
->raw
= trace_nop_print
;
503 if (event
->hex
== NULL
)
504 event
->hex
= trace_nop_print
;
505 if (event
->binary
== NULL
)
506 event
->binary
= trace_nop_print
;
508 key
= event
->type
& (EVENT_HASHSIZE
- 1);
510 hlist_add_head_rcu(&event
->node
, &event_hash
[key
]);
514 mutex_unlock(&trace_event_mutex
);
520 * unregister_ftrace_event - remove a no longer used event
521 * @event: the event to remove
523 int unregister_ftrace_event(struct trace_event
*event
)
525 mutex_lock(&trace_event_mutex
);
526 hlist_del(&event
->node
);
527 mutex_unlock(&trace_event_mutex
);
536 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
)
538 return TRACE_TYPE_HANDLED
;
542 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
)
544 struct ftrace_entry
*field
;
545 struct trace_seq
*s
= &iter
->seq
;
547 trace_assign_type(field
, iter
->ent
);
549 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
552 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
553 if (!trace_seq_printf(s
, " <-"))
555 if (!seq_print_ip_sym(s
,
560 if (!trace_seq_printf(s
, "\n"))
563 return TRACE_TYPE_HANDLED
;
566 return TRACE_TYPE_PARTIAL_LINE
;
569 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
)
571 struct ftrace_entry
*field
;
573 trace_assign_type(field
, iter
->ent
);
575 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
578 return TRACE_TYPE_PARTIAL_LINE
;
580 return TRACE_TYPE_HANDLED
;
583 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
)
585 struct ftrace_entry
*field
;
586 struct trace_seq
*s
= &iter
->seq
;
588 trace_assign_type(field
, iter
->ent
);
590 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
591 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
593 return TRACE_TYPE_HANDLED
;
596 static enum print_line_t
trace_fn_bin(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_FIELD_RET(s
, field
->ip
);
604 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
606 return TRACE_TYPE_HANDLED
;
609 static struct trace_event trace_fn_event
= {
611 .trace
= trace_fn_trace
,
614 .binary
= trace_fn_bin
,
617 /* TRACE_CTX an TRACE_WAKE */
618 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
621 struct ctx_switch_entry
*field
;
622 char comm
[TASK_COMM_LEN
];
626 trace_assign_type(field
, iter
->ent
);
628 T
= task_state_char(field
->next_state
);
629 S
= task_state_char(field
->prev_state
);
630 trace_find_cmdline(field
->next_pid
, comm
);
631 if (!trace_seq_printf(&iter
->seq
,
632 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
640 return TRACE_TYPE_PARTIAL_LINE
;
642 return TRACE_TYPE_HANDLED
;
645 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
)
647 return trace_ctxwake_print(iter
, "==>");
650 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
653 return trace_ctxwake_print(iter
, " +");
656 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
658 struct ctx_switch_entry
*field
;
661 trace_assign_type(field
, iter
->ent
);
664 task_state_char(field
->prev_state
);
665 T
= task_state_char(field
->next_state
);
666 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
674 return TRACE_TYPE_PARTIAL_LINE
;
676 return TRACE_TYPE_HANDLED
;
679 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
)
681 return trace_ctxwake_raw(iter
, 0);
684 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
)
686 return trace_ctxwake_raw(iter
, '+');
690 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
692 struct ctx_switch_entry
*field
;
693 struct trace_seq
*s
= &iter
->seq
;
696 trace_assign_type(field
, iter
->ent
);
699 task_state_char(field
->prev_state
);
700 T
= task_state_char(field
->next_state
);
702 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
703 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
704 SEQ_PUT_HEX_FIELD_RET(s
, S
);
705 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
706 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
707 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
708 SEQ_PUT_HEX_FIELD_RET(s
, T
);
710 return TRACE_TYPE_HANDLED
;
713 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
)
715 return trace_ctxwake_hex(iter
, 0);
718 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
)
720 return trace_ctxwake_hex(iter
, '+');
723 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
726 struct ctx_switch_entry
*field
;
727 struct trace_seq
*s
= &iter
->seq
;
729 trace_assign_type(field
, iter
->ent
);
731 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
732 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
733 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
734 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
735 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
736 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
738 return TRACE_TYPE_HANDLED
;
741 static struct trace_event trace_ctx_event
= {
743 .trace
= trace_ctx_print
,
744 .raw
= trace_ctx_raw
,
745 .hex
= trace_ctx_hex
,
746 .binary
= trace_ctxwake_bin
,
749 static struct trace_event trace_wake_event
= {
751 .trace
= trace_wake_print
,
752 .raw
= trace_wake_raw
,
753 .hex
= trace_wake_hex
,
754 .binary
= trace_ctxwake_bin
,
758 static enum print_line_t
trace_special_print(struct trace_iterator
*iter
,
761 struct special_entry
*field
;
763 trace_assign_type(field
, iter
->ent
);
765 if (!trace_seq_printf(&iter
->seq
, "# %ld %ld %ld\n",
769 return TRACE_TYPE_PARTIAL_LINE
;
771 return TRACE_TYPE_HANDLED
;
774 static enum print_line_t
trace_special_hex(struct trace_iterator
*iter
,
777 struct special_entry
*field
;
778 struct trace_seq
*s
= &iter
->seq
;
780 trace_assign_type(field
, iter
->ent
);
782 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg1
);
783 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg2
);
784 SEQ_PUT_HEX_FIELD_RET(s
, field
->arg3
);
786 return TRACE_TYPE_HANDLED
;
789 static enum print_line_t
trace_special_bin(struct trace_iterator
*iter
,
792 struct special_entry
*field
;
793 struct trace_seq
*s
= &iter
->seq
;
795 trace_assign_type(field
, iter
->ent
);
797 SEQ_PUT_FIELD_RET(s
, field
->arg1
);
798 SEQ_PUT_FIELD_RET(s
, field
->arg2
);
799 SEQ_PUT_FIELD_RET(s
, field
->arg3
);
801 return TRACE_TYPE_HANDLED
;
804 static struct trace_event trace_special_event
= {
805 .type
= TRACE_SPECIAL
,
806 .trace
= trace_special_print
,
807 .raw
= trace_special_print
,
808 .hex
= trace_special_hex
,
809 .binary
= trace_special_bin
,
814 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
817 struct stack_entry
*field
;
818 struct trace_seq
*s
= &iter
->seq
;
821 trace_assign_type(field
, iter
->ent
);
823 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
825 if (!trace_seq_puts(s
, " <= "))
828 if (!seq_print_ip_sym(s
, field
->caller
[i
], flags
))
831 if (!trace_seq_puts(s
, "\n"))
835 return TRACE_TYPE_HANDLED
;
838 return TRACE_TYPE_PARTIAL_LINE
;
841 static struct trace_event trace_stack_event
= {
843 .trace
= trace_stack_print
,
844 .raw
= trace_special_print
,
845 .hex
= trace_special_hex
,
846 .binary
= trace_special_bin
,
849 /* TRACE_USER_STACK */
850 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
853 struct userstack_entry
*field
;
854 struct trace_seq
*s
= &iter
->seq
;
856 trace_assign_type(field
, iter
->ent
);
858 if (!seq_print_userip_objs(field
, s
, flags
))
861 if (!trace_seq_putc(s
, '\n'))
864 return TRACE_TYPE_HANDLED
;
867 return TRACE_TYPE_PARTIAL_LINE
;
870 static struct trace_event trace_user_stack_event
= {
871 .type
= TRACE_USER_STACK
,
872 .trace
= trace_user_stack_print
,
873 .raw
= trace_special_print
,
874 .hex
= trace_special_hex
,
875 .binary
= trace_special_bin
,
879 static enum print_line_t
880 trace_bprint_print(struct trace_iterator
*iter
, int flags
)
882 struct trace_entry
*entry
= iter
->ent
;
883 struct trace_seq
*s
= &iter
->seq
;
884 struct bprint_entry
*field
;
886 trace_assign_type(field
, entry
);
888 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
891 if (!trace_seq_puts(s
, ": "))
894 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
897 return TRACE_TYPE_HANDLED
;
900 return TRACE_TYPE_PARTIAL_LINE
;
904 static enum print_line_t
905 trace_bprint_raw(struct trace_iterator
*iter
, int flags
)
907 struct bprint_entry
*field
;
908 struct trace_seq
*s
= &iter
->seq
;
910 trace_assign_type(field
, iter
->ent
);
912 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
915 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
918 return TRACE_TYPE_HANDLED
;
921 return TRACE_TYPE_PARTIAL_LINE
;
925 static struct trace_event trace_bprint_event
= {
926 .type
= TRACE_BPRINT
,
927 .trace
= trace_bprint_print
,
928 .raw
= trace_bprint_raw
,
932 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
935 struct print_entry
*field
;
936 struct trace_seq
*s
= &iter
->seq
;
938 trace_assign_type(field
, iter
->ent
);
940 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
943 if (!trace_seq_printf(s
, ": %s", field
->buf
))
946 return TRACE_TYPE_HANDLED
;
949 return TRACE_TYPE_PARTIAL_LINE
;
952 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
)
954 struct print_entry
*field
;
956 trace_assign_type(field
, iter
->ent
);
958 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
961 return TRACE_TYPE_HANDLED
;
964 return TRACE_TYPE_PARTIAL_LINE
;
967 static struct trace_event trace_print_event
= {
969 .trace
= trace_print_print
,
970 .raw
= trace_print_raw
,
974 static struct trace_event
*events
[] __initdata
= {
978 &trace_special_event
,
980 &trace_user_stack_event
,
986 __init
static int init_events(void)
988 struct trace_event
*event
;
991 for (i
= 0; events
[i
]; i
++) {
994 ret
= register_ftrace_event(event
);
996 printk(KERN_WARNING
"event %d failed to register\n",
1004 device_initcall(init_events
);