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 enum print_line_t
trace_print_bputs_msg_only(struct trace_iterator
*iter
)
25 struct trace_seq
*s
= &iter
->seq
;
26 struct trace_entry
*entry
= iter
->ent
;
27 struct bputs_entry
*field
;
29 trace_assign_type(field
, entry
);
31 trace_seq_puts(s
, field
->str
);
33 return trace_handle_return(s
);
36 enum print_line_t
trace_print_bprintk_msg_only(struct trace_iterator
*iter
)
38 struct trace_seq
*s
= &iter
->seq
;
39 struct trace_entry
*entry
= iter
->ent
;
40 struct bprint_entry
*field
;
42 trace_assign_type(field
, entry
);
44 trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
46 return trace_handle_return(s
);
49 enum print_line_t
trace_print_printk_msg_only(struct trace_iterator
*iter
)
51 struct trace_seq
*s
= &iter
->seq
;
52 struct trace_entry
*entry
= iter
->ent
;
53 struct print_entry
*field
;
55 trace_assign_type(field
, entry
);
57 trace_seq_puts(s
, field
->buf
);
59 return trace_handle_return(s
);
63 trace_print_flags_seq(struct trace_seq
*p
, const char *delim
,
65 const struct trace_print_flags
*flag_array
)
69 const char *ret
= trace_seq_buffer_ptr(p
);
72 for (i
= 0; flag_array
[i
].name
&& flags
; i
++) {
74 mask
= flag_array
[i
].mask
;
75 if ((flags
& mask
) != mask
)
78 str
= flag_array
[i
].name
;
81 trace_seq_puts(p
, delim
);
84 trace_seq_puts(p
, str
);
87 /* check for left over flags */
90 trace_seq_puts(p
, delim
);
91 trace_seq_printf(p
, "0x%lx", flags
);
98 EXPORT_SYMBOL(trace_print_flags_seq
);
101 trace_print_symbols_seq(struct trace_seq
*p
, unsigned long val
,
102 const struct trace_print_flags
*symbol_array
)
105 const char *ret
= trace_seq_buffer_ptr(p
);
107 for (i
= 0; symbol_array
[i
].name
; i
++) {
109 if (val
!= symbol_array
[i
].mask
)
112 trace_seq_puts(p
, symbol_array
[i
].name
);
116 if (ret
== (const char *)(trace_seq_buffer_ptr(p
)))
117 trace_seq_printf(p
, "0x%lx", val
);
119 trace_seq_putc(p
, 0);
123 EXPORT_SYMBOL(trace_print_symbols_seq
);
125 #if BITS_PER_LONG == 32
127 trace_print_symbols_seq_u64(struct trace_seq
*p
, unsigned long long val
,
128 const struct trace_print_flags_u64
*symbol_array
)
131 const char *ret
= trace_seq_buffer_ptr(p
);
133 for (i
= 0; symbol_array
[i
].name
; i
++) {
135 if (val
!= symbol_array
[i
].mask
)
138 trace_seq_puts(p
, symbol_array
[i
].name
);
142 if (ret
== (const char *)(trace_seq_buffer_ptr(p
)))
143 trace_seq_printf(p
, "0x%llx", val
);
145 trace_seq_putc(p
, 0);
149 EXPORT_SYMBOL(trace_print_symbols_seq_u64
);
153 trace_print_bitmask_seq(struct trace_seq
*p
, void *bitmask_ptr
,
154 unsigned int bitmask_size
)
156 const char *ret
= trace_seq_buffer_ptr(p
);
158 trace_seq_bitmask(p
, bitmask_ptr
, bitmask_size
* 8);
159 trace_seq_putc(p
, 0);
163 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq
);
166 trace_print_hex_seq(struct trace_seq
*p
, const unsigned char *buf
, int buf_len
)
169 const char *ret
= trace_seq_buffer_ptr(p
);
171 for (i
= 0; i
< buf_len
; i
++)
172 trace_seq_printf(p
, "%s%2.2x", i
== 0 ? "" : " ", buf
[i
]);
174 trace_seq_putc(p
, 0);
178 EXPORT_SYMBOL(trace_print_hex_seq
);
181 trace_print_array_seq(struct trace_seq
*p
, const void *buf
, int count
,
184 const char *ret
= trace_seq_buffer_ptr(p
);
185 const char *prefix
= "";
186 void *ptr
= (void *)buf
;
187 size_t buf_len
= count
* el_size
;
189 trace_seq_putc(p
, '{');
191 while (ptr
< buf
+ buf_len
) {
194 trace_seq_printf(p
, "%s0x%x", prefix
,
198 trace_seq_printf(p
, "%s0x%x", prefix
,
202 trace_seq_printf(p
, "%s0x%x", prefix
,
206 trace_seq_printf(p
, "%s0x%llx", prefix
,
210 trace_seq_printf(p
, "BAD SIZE:%zu 0x%x", el_size
,
218 trace_seq_putc(p
, '}');
219 trace_seq_putc(p
, 0);
223 EXPORT_SYMBOL(trace_print_array_seq
);
225 int trace_raw_output_prep(struct trace_iterator
*iter
,
226 struct trace_event
*trace_event
)
228 struct trace_event_call
*event
;
229 struct trace_seq
*s
= &iter
->seq
;
230 struct trace_seq
*p
= &iter
->tmp_seq
;
231 struct trace_entry
*entry
;
233 event
= container_of(trace_event
, struct trace_event_call
, event
);
236 if (entry
->type
!= event
->event
.type
) {
238 return TRACE_TYPE_UNHANDLED
;
242 trace_seq_printf(s
, "%s: ", trace_event_name(event
));
244 return trace_handle_return(s
);
246 EXPORT_SYMBOL(trace_raw_output_prep
);
248 static int trace_output_raw(struct trace_iterator
*iter
, char *name
,
249 char *fmt
, va_list ap
)
251 struct trace_seq
*s
= &iter
->seq
;
253 trace_seq_printf(s
, "%s: ", name
);
254 trace_seq_vprintf(s
, fmt
, ap
);
256 return trace_handle_return(s
);
259 int trace_output_call(struct trace_iterator
*iter
, char *name
, char *fmt
, ...)
265 ret
= trace_output_raw(iter
, name
, fmt
, ap
);
270 EXPORT_SYMBOL_GPL(trace_output_call
);
272 #ifdef CONFIG_KRETPROBES
273 static inline const char *kretprobed(const char *name
)
275 static const char tramp_name
[] = "kretprobe_trampoline";
276 int size
= sizeof(tramp_name
);
278 if (strncmp(tramp_name
, name
, size
) == 0)
279 return "[unknown/kretprobe'd]";
283 static inline const char *kretprobed(const char *name
)
287 #endif /* CONFIG_KRETPROBES */
290 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
292 #ifdef CONFIG_KALLSYMS
293 char str
[KSYM_SYMBOL_LEN
];
296 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
298 name
= kretprobed(str
);
300 trace_seq_printf(s
, fmt
, name
);
305 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
306 unsigned long address
)
308 #ifdef CONFIG_KALLSYMS
309 char str
[KSYM_SYMBOL_LEN
];
312 sprint_symbol(str
, address
);
313 name
= kretprobed(str
);
315 trace_seq_printf(s
, fmt
, name
);
320 # define IP_FMT "%08lx"
322 # define IP_FMT "%016lx"
325 static int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
326 unsigned long ip
, unsigned long sym_flags
)
328 struct file
*file
= NULL
;
329 unsigned long vmstart
= 0;
336 const struct vm_area_struct
*vma
;
338 down_read(&mm
->mmap_sem
);
339 vma
= find_vma(mm
, ip
);
342 vmstart
= vma
->vm_start
;
345 ret
= trace_seq_path(s
, &file
->f_path
);
347 trace_seq_printf(s
, "[+0x%lx]",
350 up_read(&mm
->mmap_sem
);
352 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
353 trace_seq_printf(s
, " <" IP_FMT
">", ip
);
354 return !trace_seq_has_overflowed(s
);
358 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
361 trace_seq_putc(s
, '0');
365 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
366 seq_print_sym_offset(s
, "%s", ip
);
368 seq_print_sym_short(s
, "%s", ip
);
370 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
371 trace_seq_printf(s
, " <" IP_FMT
">", ip
);
374 return !trace_seq_has_overflowed(s
);
378 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
379 * @s: trace seq struct to write to
380 * @entry: The trace entry field from the ring buffer
382 * Prints the generic fields of irqs off, in hard or softirq, preempt
385 int trace_print_lat_fmt(struct trace_seq
*s
, struct trace_entry
*entry
)
393 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
394 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
397 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
398 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ? 'X' :
401 switch (entry
->flags
& (TRACE_FLAG_NEED_RESCHED
|
402 TRACE_FLAG_PREEMPT_RESCHED
)) {
403 case TRACE_FLAG_NEED_RESCHED
| TRACE_FLAG_PREEMPT_RESCHED
:
406 case TRACE_FLAG_NEED_RESCHED
:
409 case TRACE_FLAG_PREEMPT_RESCHED
:
418 (hardirq
&& softirq
) ? 'H' :
423 trace_seq_printf(s
, "%c%c%c",
424 irqs_off
, need_resched
, hardsoft_irq
);
426 if (entry
->preempt_count
)
427 trace_seq_printf(s
, "%x", entry
->preempt_count
);
429 trace_seq_putc(s
, '.');
431 return !trace_seq_has_overflowed(s
);
435 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
437 char comm
[TASK_COMM_LEN
];
439 trace_find_cmdline(entry
->pid
, comm
);
441 trace_seq_printf(s
, "%8.8s-%-5d %3d",
442 comm
, entry
->pid
, cpu
);
444 return trace_print_lat_fmt(s
, entry
);
448 #define MARK(v, s) {.val = v, .sym = s}
449 /* trace overhead mark */
450 static const struct trace_mark
{
451 unsigned long long val
; /* unit: nsec */
454 MARK(1000000000ULL , '$'), /* 1 sec */
455 MARK(100000000ULL , '@'), /* 100 msec */
456 MARK(10000000ULL , '*'), /* 10 msec */
457 MARK(1000000ULL , '#'), /* 1000 usecs */
458 MARK(100000ULL , '!'), /* 100 usecs */
459 MARK(10000ULL , '+'), /* 10 usecs */
463 char trace_find_mark(unsigned long long d
)
466 int size
= ARRAY_SIZE(mark
);
468 for (i
= 0; i
< size
; i
++) {
473 return (i
== size
) ? ' ' : mark
[i
].sym
;
477 lat_print_timestamp(struct trace_iterator
*iter
, u64 next_ts
)
479 struct trace_array
*tr
= iter
->tr
;
480 unsigned long verbose
= tr
->trace_flags
& TRACE_ITER_VERBOSE
;
481 unsigned long in_ns
= iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
;
482 unsigned long long abs_ts
= iter
->ts
- iter
->trace_buffer
->time_start
;
483 unsigned long long rel_ts
= next_ts
- iter
->ts
;
484 struct trace_seq
*s
= &iter
->seq
;
487 abs_ts
= ns2usecs(abs_ts
);
488 rel_ts
= ns2usecs(rel_ts
);
491 if (verbose
&& in_ns
) {
492 unsigned long abs_usec
= do_div(abs_ts
, USEC_PER_MSEC
);
493 unsigned long abs_msec
= (unsigned long)abs_ts
;
494 unsigned long rel_usec
= do_div(rel_ts
, USEC_PER_MSEC
);
495 unsigned long rel_msec
= (unsigned long)rel_ts
;
498 s
, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
503 } else if (verbose
&& !in_ns
) {
505 s
, "[%016llx] %lld (+%lld): ",
506 iter
->ts
, abs_ts
, rel_ts
);
508 } else if (!verbose
&& in_ns
) {
512 trace_find_mark(rel_ts
* NSEC_PER_USEC
));
514 } else { /* !verbose && !in_ns */
515 trace_seq_printf(s
, " %4lld: ", abs_ts
);
518 return !trace_seq_has_overflowed(s
);
521 int trace_print_context(struct trace_iterator
*iter
)
523 struct trace_array
*tr
= iter
->tr
;
524 struct trace_seq
*s
= &iter
->seq
;
525 struct trace_entry
*entry
= iter
->ent
;
526 unsigned long long t
;
527 unsigned long secs
, usec_rem
;
528 char comm
[TASK_COMM_LEN
];
530 trace_find_cmdline(entry
->pid
, comm
);
532 trace_seq_printf(s
, "%16s-%-5d [%03d] ",
533 comm
, entry
->pid
, iter
->cpu
);
535 if (tr
->trace_flags
& TRACE_ITER_IRQ_INFO
)
536 trace_print_lat_fmt(s
, entry
);
538 if (iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
) {
539 t
= ns2usecs(iter
->ts
);
540 usec_rem
= do_div(t
, USEC_PER_SEC
);
541 secs
= (unsigned long)t
;
542 trace_seq_printf(s
, " %5lu.%06lu: ", secs
, usec_rem
);
544 trace_seq_printf(s
, " %12llu: ", iter
->ts
);
546 return !trace_seq_has_overflowed(s
);
549 int trace_print_lat_context(struct trace_iterator
*iter
)
551 struct trace_array
*tr
= iter
->tr
;
552 /* trace_find_next_entry will reset ent_size */
553 int ent_size
= iter
->ent_size
;
554 struct trace_seq
*s
= &iter
->seq
;
556 struct trace_entry
*entry
= iter
->ent
,
557 *next_entry
= trace_find_next_entry(iter
, NULL
,
559 unsigned long verbose
= (tr
->trace_flags
& TRACE_ITER_VERBOSE
);
561 /* Restore the original ent_size */
562 iter
->ent_size
= ent_size
;
568 char comm
[TASK_COMM_LEN
];
570 trace_find_cmdline(entry
->pid
, comm
);
573 s
, "%16s %5d %3d %d %08x %08lx ",
574 comm
, entry
->pid
, iter
->cpu
, entry
->flags
,
575 entry
->preempt_count
, iter
->idx
);
577 lat_print_generic(s
, entry
, iter
->cpu
);
580 lat_print_timestamp(iter
, next_ts
);
582 return !trace_seq_has_overflowed(s
);
585 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
587 static int task_state_char(unsigned long state
)
589 int bit
= state
? __ffs(state
) + 1 : 0;
591 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
595 * ftrace_find_event - find a registered event
596 * @type: the type of event to look for
598 * Returns an event of type @type otherwise NULL
599 * Called with trace_event_read_lock() held.
601 struct trace_event
*ftrace_find_event(int type
)
603 struct trace_event
*event
;
606 key
= type
& (EVENT_HASHSIZE
- 1);
608 hlist_for_each_entry(event
, &event_hash
[key
], node
) {
609 if (event
->type
== type
)
616 static LIST_HEAD(ftrace_event_list
);
618 static int trace_search_list(struct list_head
**list
)
620 struct trace_event
*e
;
621 int last
= __TRACE_LAST_TYPE
;
623 if (list_empty(&ftrace_event_list
)) {
624 *list
= &ftrace_event_list
;
629 * We used up all possible max events,
630 * lets see if somebody freed one.
632 list_for_each_entry(e
, &ftrace_event_list
, list
) {
633 if (e
->type
!= last
+ 1)
638 /* Did we used up all 65 thousand events??? */
639 if ((last
+ 1) > TRACE_EVENT_TYPE_MAX
)
646 void trace_event_read_lock(void)
648 down_read(&trace_event_sem
);
651 void trace_event_read_unlock(void)
653 up_read(&trace_event_sem
);
657 * register_trace_event - register output for an event type
658 * @event: the event type to register
660 * Event types are stored in a hash and this hash is used to
661 * find a way to print an event. If the @event->type is set
662 * then it will use that type, otherwise it will assign a
665 * If you assign your own type, please make sure it is added
666 * to the trace_type enum in trace.h, to avoid collisions
667 * with the dynamic types.
669 * Returns the event type number or zero on error.
671 int register_trace_event(struct trace_event
*event
)
676 down_write(&trace_event_sem
);
681 if (WARN_ON(!event
->funcs
))
684 INIT_LIST_HEAD(&event
->list
);
687 struct list_head
*list
= NULL
;
689 if (next_event_type
> TRACE_EVENT_TYPE_MAX
) {
691 event
->type
= trace_search_list(&list
);
697 event
->type
= next_event_type
++;
698 list
= &ftrace_event_list
;
701 if (WARN_ON(ftrace_find_event(event
->type
)))
704 list_add_tail(&event
->list
, list
);
706 } else if (event
->type
> __TRACE_LAST_TYPE
) {
707 printk(KERN_WARNING
"Need to add type to trace.h\n");
711 /* Is this event already used */
712 if (ftrace_find_event(event
->type
))
716 if (event
->funcs
->trace
== NULL
)
717 event
->funcs
->trace
= trace_nop_print
;
718 if (event
->funcs
->raw
== NULL
)
719 event
->funcs
->raw
= trace_nop_print
;
720 if (event
->funcs
->hex
== NULL
)
721 event
->funcs
->hex
= trace_nop_print
;
722 if (event
->funcs
->binary
== NULL
)
723 event
->funcs
->binary
= trace_nop_print
;
725 key
= event
->type
& (EVENT_HASHSIZE
- 1);
727 hlist_add_head(&event
->node
, &event_hash
[key
]);
731 up_write(&trace_event_sem
);
735 EXPORT_SYMBOL_GPL(register_trace_event
);
738 * Used by module code with the trace_event_sem held for write.
740 int __unregister_trace_event(struct trace_event
*event
)
742 hlist_del(&event
->node
);
743 list_del(&event
->list
);
748 * unregister_trace_event - remove a no longer used event
749 * @event: the event to remove
751 int unregister_trace_event(struct trace_event
*event
)
753 down_write(&trace_event_sem
);
754 __unregister_trace_event(event
);
755 up_write(&trace_event_sem
);
759 EXPORT_SYMBOL_GPL(unregister_trace_event
);
765 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
766 struct trace_event
*event
)
768 trace_seq_printf(&iter
->seq
, "type: %d\n", iter
->ent
->type
);
770 return trace_handle_return(&iter
->seq
);
774 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
775 struct trace_event
*event
)
777 struct ftrace_entry
*field
;
778 struct trace_seq
*s
= &iter
->seq
;
780 trace_assign_type(field
, iter
->ent
);
782 seq_print_ip_sym(s
, field
->ip
, flags
);
784 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
785 trace_seq_puts(s
, " <-");
786 seq_print_ip_sym(s
, field
->parent_ip
, flags
);
789 trace_seq_putc(s
, '\n');
791 return trace_handle_return(s
);
794 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
795 struct trace_event
*event
)
797 struct ftrace_entry
*field
;
799 trace_assign_type(field
, iter
->ent
);
801 trace_seq_printf(&iter
->seq
, "%lx %lx\n",
805 return trace_handle_return(&iter
->seq
);
808 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
809 struct trace_event
*event
)
811 struct ftrace_entry
*field
;
812 struct trace_seq
*s
= &iter
->seq
;
814 trace_assign_type(field
, iter
->ent
);
816 SEQ_PUT_HEX_FIELD(s
, field
->ip
);
817 SEQ_PUT_HEX_FIELD(s
, field
->parent_ip
);
819 return trace_handle_return(s
);
822 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
823 struct trace_event
*event
)
825 struct ftrace_entry
*field
;
826 struct trace_seq
*s
= &iter
->seq
;
828 trace_assign_type(field
, iter
->ent
);
830 SEQ_PUT_FIELD(s
, field
->ip
);
831 SEQ_PUT_FIELD(s
, field
->parent_ip
);
833 return trace_handle_return(s
);
836 static struct trace_event_functions trace_fn_funcs
= {
837 .trace
= trace_fn_trace
,
840 .binary
= trace_fn_bin
,
843 static struct trace_event trace_fn_event
= {
845 .funcs
= &trace_fn_funcs
,
848 /* TRACE_CTX an TRACE_WAKE */
849 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
852 struct ctx_switch_entry
*field
;
853 char comm
[TASK_COMM_LEN
];
857 trace_assign_type(field
, iter
->ent
);
859 T
= task_state_char(field
->next_state
);
860 S
= task_state_char(field
->prev_state
);
861 trace_find_cmdline(field
->next_pid
, comm
);
862 trace_seq_printf(&iter
->seq
,
863 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
872 return trace_handle_return(&iter
->seq
);
875 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
876 struct trace_event
*event
)
878 return trace_ctxwake_print(iter
, "==>");
881 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
882 int flags
, struct trace_event
*event
)
884 return trace_ctxwake_print(iter
, " +");
887 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
889 struct ctx_switch_entry
*field
;
892 trace_assign_type(field
, iter
->ent
);
895 S
= task_state_char(field
->prev_state
);
896 T
= task_state_char(field
->next_state
);
897 trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
906 return trace_handle_return(&iter
->seq
);
909 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
910 struct trace_event
*event
)
912 return trace_ctxwake_raw(iter
, 0);
915 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
916 struct trace_event
*event
)
918 return trace_ctxwake_raw(iter
, '+');
922 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
924 struct ctx_switch_entry
*field
;
925 struct trace_seq
*s
= &iter
->seq
;
928 trace_assign_type(field
, iter
->ent
);
931 S
= task_state_char(field
->prev_state
);
932 T
= task_state_char(field
->next_state
);
934 SEQ_PUT_HEX_FIELD(s
, field
->prev_pid
);
935 SEQ_PUT_HEX_FIELD(s
, field
->prev_prio
);
936 SEQ_PUT_HEX_FIELD(s
, S
);
937 SEQ_PUT_HEX_FIELD(s
, field
->next_cpu
);
938 SEQ_PUT_HEX_FIELD(s
, field
->next_pid
);
939 SEQ_PUT_HEX_FIELD(s
, field
->next_prio
);
940 SEQ_PUT_HEX_FIELD(s
, T
);
942 return trace_handle_return(s
);
945 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
946 struct trace_event
*event
)
948 return trace_ctxwake_hex(iter
, 0);
951 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
952 struct trace_event
*event
)
954 return trace_ctxwake_hex(iter
, '+');
957 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
958 int flags
, struct trace_event
*event
)
960 struct ctx_switch_entry
*field
;
961 struct trace_seq
*s
= &iter
->seq
;
963 trace_assign_type(field
, iter
->ent
);
965 SEQ_PUT_FIELD(s
, field
->prev_pid
);
966 SEQ_PUT_FIELD(s
, field
->prev_prio
);
967 SEQ_PUT_FIELD(s
, field
->prev_state
);
968 SEQ_PUT_FIELD(s
, field
->next_cpu
);
969 SEQ_PUT_FIELD(s
, field
->next_pid
);
970 SEQ_PUT_FIELD(s
, field
->next_prio
);
971 SEQ_PUT_FIELD(s
, field
->next_state
);
973 return trace_handle_return(s
);
976 static struct trace_event_functions trace_ctx_funcs
= {
977 .trace
= trace_ctx_print
,
978 .raw
= trace_ctx_raw
,
979 .hex
= trace_ctx_hex
,
980 .binary
= trace_ctxwake_bin
,
983 static struct trace_event trace_ctx_event
= {
985 .funcs
= &trace_ctx_funcs
,
988 static struct trace_event_functions trace_wake_funcs
= {
989 .trace
= trace_wake_print
,
990 .raw
= trace_wake_raw
,
991 .hex
= trace_wake_hex
,
992 .binary
= trace_ctxwake_bin
,
995 static struct trace_event trace_wake_event
= {
997 .funcs
= &trace_wake_funcs
,
1002 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1003 int flags
, struct trace_event
*event
)
1005 struct stack_entry
*field
;
1006 struct trace_seq
*s
= &iter
->seq
;
1010 trace_assign_type(field
, iter
->ent
);
1011 end
= (unsigned long *)((long)iter
->ent
+ iter
->ent_size
);
1013 trace_seq_puts(s
, "<stack trace>\n");
1015 for (p
= field
->caller
; p
&& *p
!= ULONG_MAX
&& p
< end
; p
++) {
1017 if (trace_seq_has_overflowed(s
))
1020 trace_seq_puts(s
, " => ");
1021 seq_print_ip_sym(s
, *p
, flags
);
1022 trace_seq_putc(s
, '\n');
1025 return trace_handle_return(s
);
1028 static struct trace_event_functions trace_stack_funcs
= {
1029 .trace
= trace_stack_print
,
1032 static struct trace_event trace_stack_event
= {
1033 .type
= TRACE_STACK
,
1034 .funcs
= &trace_stack_funcs
,
1037 /* TRACE_USER_STACK */
1038 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1039 int flags
, struct trace_event
*event
)
1041 struct trace_array
*tr
= iter
->tr
;
1042 struct userstack_entry
*field
;
1043 struct trace_seq
*s
= &iter
->seq
;
1044 struct mm_struct
*mm
= NULL
;
1047 trace_assign_type(field
, iter
->ent
);
1049 trace_seq_puts(s
, "<user stack trace>\n");
1051 if (tr
->trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
1052 struct task_struct
*task
;
1054 * we do the lookup on the thread group leader,
1055 * since individual threads might have already quit!
1058 task
= find_task_by_vpid(field
->tgid
);
1060 mm
= get_task_mm(task
);
1064 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
1065 unsigned long ip
= field
->caller
[i
];
1067 if (ip
== ULONG_MAX
|| trace_seq_has_overflowed(s
))
1070 trace_seq_puts(s
, " => ");
1073 trace_seq_puts(s
, "??");
1074 trace_seq_putc(s
, '\n');
1078 seq_print_user_ip(s
, mm
, ip
, flags
);
1079 trace_seq_putc(s
, '\n');
1085 return trace_handle_return(s
);
1088 static struct trace_event_functions trace_user_stack_funcs
= {
1089 .trace
= trace_user_stack_print
,
1092 static struct trace_event trace_user_stack_event
= {
1093 .type
= TRACE_USER_STACK
,
1094 .funcs
= &trace_user_stack_funcs
,
1098 static enum print_line_t
1099 trace_bputs_print(struct trace_iterator
*iter
, int flags
,
1100 struct trace_event
*event
)
1102 struct trace_entry
*entry
= iter
->ent
;
1103 struct trace_seq
*s
= &iter
->seq
;
1104 struct bputs_entry
*field
;
1106 trace_assign_type(field
, entry
);
1108 seq_print_ip_sym(s
, field
->ip
, flags
);
1109 trace_seq_puts(s
, ": ");
1110 trace_seq_puts(s
, field
->str
);
1112 return trace_handle_return(s
);
1116 static enum print_line_t
1117 trace_bputs_raw(struct trace_iterator
*iter
, int flags
,
1118 struct trace_event
*event
)
1120 struct bputs_entry
*field
;
1121 struct trace_seq
*s
= &iter
->seq
;
1123 trace_assign_type(field
, iter
->ent
);
1125 trace_seq_printf(s
, ": %lx : ", field
->ip
);
1126 trace_seq_puts(s
, field
->str
);
1128 return trace_handle_return(s
);
1131 static struct trace_event_functions trace_bputs_funcs
= {
1132 .trace
= trace_bputs_print
,
1133 .raw
= trace_bputs_raw
,
1136 static struct trace_event trace_bputs_event
= {
1137 .type
= TRACE_BPUTS
,
1138 .funcs
= &trace_bputs_funcs
,
1142 static enum print_line_t
1143 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1144 struct trace_event
*event
)
1146 struct trace_entry
*entry
= iter
->ent
;
1147 struct trace_seq
*s
= &iter
->seq
;
1148 struct bprint_entry
*field
;
1150 trace_assign_type(field
, entry
);
1152 seq_print_ip_sym(s
, field
->ip
, flags
);
1153 trace_seq_puts(s
, ": ");
1154 trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
1156 return trace_handle_return(s
);
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 trace_seq_printf(s
, ": %lx : ", field
->ip
);
1170 trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
1172 return trace_handle_return(s
);
1175 static struct trace_event_functions trace_bprint_funcs
= {
1176 .trace
= trace_bprint_print
,
1177 .raw
= trace_bprint_raw
,
1180 static struct trace_event trace_bprint_event
= {
1181 .type
= TRACE_BPRINT
,
1182 .funcs
= &trace_bprint_funcs
,
1186 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1187 int flags
, struct trace_event
*event
)
1189 struct print_entry
*field
;
1190 struct trace_seq
*s
= &iter
->seq
;
1192 trace_assign_type(field
, iter
->ent
);
1194 seq_print_ip_sym(s
, field
->ip
, flags
);
1195 trace_seq_printf(s
, ": %s", field
->buf
);
1197 return trace_handle_return(s
);
1200 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1201 struct trace_event
*event
)
1203 struct print_entry
*field
;
1205 trace_assign_type(field
, iter
->ent
);
1207 trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
);
1209 return trace_handle_return(&iter
->seq
);
1212 static struct trace_event_functions trace_print_funcs
= {
1213 .trace
= trace_print_print
,
1214 .raw
= trace_print_raw
,
1217 static struct trace_event trace_print_event
= {
1218 .type
= TRACE_PRINT
,
1219 .funcs
= &trace_print_funcs
,
1223 static struct trace_event
*events
[] __initdata
= {
1228 &trace_user_stack_event
,
1230 &trace_bprint_event
,
1235 __init
static int init_events(void)
1237 struct trace_event
*event
;
1240 for (i
= 0; events
[i
]; i
++) {
1243 ret
= register_trace_event(event
);
1245 printk(KERN_WARNING
"event %d failed to register\n",
1253 early_initcall(init_events
);