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 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 unsigned long verbose
= trace_flags
& TRACE_ITER_VERBOSE
;
480 unsigned long in_ns
= iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
;
481 unsigned long long abs_ts
= iter
->ts
- iter
->trace_buffer
->time_start
;
482 unsigned long long rel_ts
= next_ts
- iter
->ts
;
483 struct trace_seq
*s
= &iter
->seq
;
486 abs_ts
= ns2usecs(abs_ts
);
487 rel_ts
= ns2usecs(rel_ts
);
490 if (verbose
&& in_ns
) {
491 unsigned long abs_usec
= do_div(abs_ts
, USEC_PER_MSEC
);
492 unsigned long abs_msec
= (unsigned long)abs_ts
;
493 unsigned long rel_usec
= do_div(rel_ts
, USEC_PER_MSEC
);
494 unsigned long rel_msec
= (unsigned long)rel_ts
;
497 s
, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
502 } else if (verbose
&& !in_ns
) {
504 s
, "[%016llx] %lld (+%lld): ",
505 iter
->ts
, abs_ts
, rel_ts
);
507 } else if (!verbose
&& in_ns
) {
511 trace_find_mark(rel_ts
* NSEC_PER_USEC
));
513 } else { /* !verbose && !in_ns */
514 trace_seq_printf(s
, " %4lld: ", abs_ts
);
517 return !trace_seq_has_overflowed(s
);
520 int trace_print_context(struct trace_iterator
*iter
)
522 struct trace_seq
*s
= &iter
->seq
;
523 struct trace_entry
*entry
= iter
->ent
;
524 unsigned long long t
;
525 unsigned long secs
, usec_rem
;
526 char comm
[TASK_COMM_LEN
];
528 trace_find_cmdline(entry
->pid
, comm
);
530 trace_seq_printf(s
, "%16s-%-5d [%03d] ",
531 comm
, entry
->pid
, iter
->cpu
);
533 if (trace_flags
& TRACE_ITER_IRQ_INFO
)
534 trace_print_lat_fmt(s
, entry
);
536 if (iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
) {
537 t
= ns2usecs(iter
->ts
);
538 usec_rem
= do_div(t
, USEC_PER_SEC
);
539 secs
= (unsigned long)t
;
540 trace_seq_printf(s
, " %5lu.%06lu: ", secs
, usec_rem
);
542 trace_seq_printf(s
, " %12llu: ", iter
->ts
);
544 return !trace_seq_has_overflowed(s
);
547 int trace_print_lat_context(struct trace_iterator
*iter
)
550 /* trace_find_next_entry will reset ent_size */
551 int ent_size
= iter
->ent_size
;
552 struct trace_seq
*s
= &iter
->seq
;
553 struct trace_entry
*entry
= iter
->ent
,
554 *next_entry
= trace_find_next_entry(iter
, NULL
,
556 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
558 /* Restore the original ent_size */
559 iter
->ent_size
= ent_size
;
565 char comm
[TASK_COMM_LEN
];
567 trace_find_cmdline(entry
->pid
, comm
);
570 s
, "%16s %5d %3d %d %08x %08lx ",
571 comm
, entry
->pid
, iter
->cpu
, entry
->flags
,
572 entry
->preempt_count
, iter
->idx
);
574 lat_print_generic(s
, entry
, iter
->cpu
);
577 lat_print_timestamp(iter
, next_ts
);
579 return !trace_seq_has_overflowed(s
);
582 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
584 static int task_state_char(unsigned long state
)
586 int bit
= state
? __ffs(state
) + 1 : 0;
588 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
592 * ftrace_find_event - find a registered event
593 * @type: the type of event to look for
595 * Returns an event of type @type otherwise NULL
596 * Called with trace_event_read_lock() held.
598 struct trace_event
*ftrace_find_event(int type
)
600 struct trace_event
*event
;
603 key
= type
& (EVENT_HASHSIZE
- 1);
605 hlist_for_each_entry(event
, &event_hash
[key
], node
) {
606 if (event
->type
== type
)
613 static LIST_HEAD(ftrace_event_list
);
615 static int trace_search_list(struct list_head
**list
)
617 struct trace_event
*e
;
618 int last
= __TRACE_LAST_TYPE
;
620 if (list_empty(&ftrace_event_list
)) {
621 *list
= &ftrace_event_list
;
626 * We used up all possible max events,
627 * lets see if somebody freed one.
629 list_for_each_entry(e
, &ftrace_event_list
, list
) {
630 if (e
->type
!= last
+ 1)
635 /* Did we used up all 65 thousand events??? */
636 if ((last
+ 1) > TRACE_EVENT_TYPE_MAX
)
643 void trace_event_read_lock(void)
645 down_read(&trace_event_sem
);
648 void trace_event_read_unlock(void)
650 up_read(&trace_event_sem
);
654 * register_trace_event - register output for an event type
655 * @event: the event type to register
657 * Event types are stored in a hash and this hash is used to
658 * find a way to print an event. If the @event->type is set
659 * then it will use that type, otherwise it will assign a
662 * If you assign your own type, please make sure it is added
663 * to the trace_type enum in trace.h, to avoid collisions
664 * with the dynamic types.
666 * Returns the event type number or zero on error.
668 int register_trace_event(struct trace_event
*event
)
673 down_write(&trace_event_sem
);
678 if (WARN_ON(!event
->funcs
))
681 INIT_LIST_HEAD(&event
->list
);
684 struct list_head
*list
= NULL
;
686 if (next_event_type
> TRACE_EVENT_TYPE_MAX
) {
688 event
->type
= trace_search_list(&list
);
694 event
->type
= next_event_type
++;
695 list
= &ftrace_event_list
;
698 if (WARN_ON(ftrace_find_event(event
->type
)))
701 list_add_tail(&event
->list
, list
);
703 } else if (event
->type
> __TRACE_LAST_TYPE
) {
704 printk(KERN_WARNING
"Need to add type to trace.h\n");
708 /* Is this event already used */
709 if (ftrace_find_event(event
->type
))
713 if (event
->funcs
->trace
== NULL
)
714 event
->funcs
->trace
= trace_nop_print
;
715 if (event
->funcs
->raw
== NULL
)
716 event
->funcs
->raw
= trace_nop_print
;
717 if (event
->funcs
->hex
== NULL
)
718 event
->funcs
->hex
= trace_nop_print
;
719 if (event
->funcs
->binary
== NULL
)
720 event
->funcs
->binary
= trace_nop_print
;
722 key
= event
->type
& (EVENT_HASHSIZE
- 1);
724 hlist_add_head(&event
->node
, &event_hash
[key
]);
728 up_write(&trace_event_sem
);
732 EXPORT_SYMBOL_GPL(register_trace_event
);
735 * Used by module code with the trace_event_sem held for write.
737 int __unregister_trace_event(struct trace_event
*event
)
739 hlist_del(&event
->node
);
740 list_del(&event
->list
);
745 * unregister_trace_event - remove a no longer used event
746 * @event: the event to remove
748 int unregister_trace_event(struct trace_event
*event
)
750 down_write(&trace_event_sem
);
751 __unregister_trace_event(event
);
752 up_write(&trace_event_sem
);
756 EXPORT_SYMBOL_GPL(unregister_trace_event
);
762 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
763 struct trace_event
*event
)
765 trace_seq_printf(&iter
->seq
, "type: %d\n", iter
->ent
->type
);
767 return trace_handle_return(&iter
->seq
);
771 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
772 struct trace_event
*event
)
774 struct ftrace_entry
*field
;
775 struct trace_seq
*s
= &iter
->seq
;
777 trace_assign_type(field
, iter
->ent
);
779 seq_print_ip_sym(s
, field
->ip
, flags
);
781 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
782 trace_seq_puts(s
, " <-");
783 seq_print_ip_sym(s
, field
->parent_ip
, flags
);
786 trace_seq_putc(s
, '\n');
788 return trace_handle_return(s
);
791 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
792 struct trace_event
*event
)
794 struct ftrace_entry
*field
;
796 trace_assign_type(field
, iter
->ent
);
798 trace_seq_printf(&iter
->seq
, "%lx %lx\n",
802 return trace_handle_return(&iter
->seq
);
805 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
806 struct trace_event
*event
)
808 struct ftrace_entry
*field
;
809 struct trace_seq
*s
= &iter
->seq
;
811 trace_assign_type(field
, iter
->ent
);
813 SEQ_PUT_HEX_FIELD(s
, field
->ip
);
814 SEQ_PUT_HEX_FIELD(s
, field
->parent_ip
);
816 return trace_handle_return(s
);
819 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
820 struct trace_event
*event
)
822 struct ftrace_entry
*field
;
823 struct trace_seq
*s
= &iter
->seq
;
825 trace_assign_type(field
, iter
->ent
);
827 SEQ_PUT_FIELD(s
, field
->ip
);
828 SEQ_PUT_FIELD(s
, field
->parent_ip
);
830 return trace_handle_return(s
);
833 static struct trace_event_functions trace_fn_funcs
= {
834 .trace
= trace_fn_trace
,
837 .binary
= trace_fn_bin
,
840 static struct trace_event trace_fn_event
= {
842 .funcs
= &trace_fn_funcs
,
845 /* TRACE_CTX an TRACE_WAKE */
846 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
849 struct ctx_switch_entry
*field
;
850 char comm
[TASK_COMM_LEN
];
854 trace_assign_type(field
, iter
->ent
);
856 T
= task_state_char(field
->next_state
);
857 S
= task_state_char(field
->prev_state
);
858 trace_find_cmdline(field
->next_pid
, comm
);
859 trace_seq_printf(&iter
->seq
,
860 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
869 return trace_handle_return(&iter
->seq
);
872 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
873 struct trace_event
*event
)
875 return trace_ctxwake_print(iter
, "==>");
878 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
879 int flags
, struct trace_event
*event
)
881 return trace_ctxwake_print(iter
, " +");
884 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
886 struct ctx_switch_entry
*field
;
889 trace_assign_type(field
, iter
->ent
);
892 S
= task_state_char(field
->prev_state
);
893 T
= task_state_char(field
->next_state
);
894 trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
903 return trace_handle_return(&iter
->seq
);
906 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
907 struct trace_event
*event
)
909 return trace_ctxwake_raw(iter
, 0);
912 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
913 struct trace_event
*event
)
915 return trace_ctxwake_raw(iter
, '+');
919 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
921 struct ctx_switch_entry
*field
;
922 struct trace_seq
*s
= &iter
->seq
;
925 trace_assign_type(field
, iter
->ent
);
928 S
= task_state_char(field
->prev_state
);
929 T
= task_state_char(field
->next_state
);
931 SEQ_PUT_HEX_FIELD(s
, field
->prev_pid
);
932 SEQ_PUT_HEX_FIELD(s
, field
->prev_prio
);
933 SEQ_PUT_HEX_FIELD(s
, S
);
934 SEQ_PUT_HEX_FIELD(s
, field
->next_cpu
);
935 SEQ_PUT_HEX_FIELD(s
, field
->next_pid
);
936 SEQ_PUT_HEX_FIELD(s
, field
->next_prio
);
937 SEQ_PUT_HEX_FIELD(s
, T
);
939 return trace_handle_return(s
);
942 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
943 struct trace_event
*event
)
945 return trace_ctxwake_hex(iter
, 0);
948 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
949 struct trace_event
*event
)
951 return trace_ctxwake_hex(iter
, '+');
954 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
955 int flags
, struct trace_event
*event
)
957 struct ctx_switch_entry
*field
;
958 struct trace_seq
*s
= &iter
->seq
;
960 trace_assign_type(field
, iter
->ent
);
962 SEQ_PUT_FIELD(s
, field
->prev_pid
);
963 SEQ_PUT_FIELD(s
, field
->prev_prio
);
964 SEQ_PUT_FIELD(s
, field
->prev_state
);
965 SEQ_PUT_FIELD(s
, field
->next_cpu
);
966 SEQ_PUT_FIELD(s
, field
->next_pid
);
967 SEQ_PUT_FIELD(s
, field
->next_prio
);
968 SEQ_PUT_FIELD(s
, field
->next_state
);
970 return trace_handle_return(s
);
973 static struct trace_event_functions trace_ctx_funcs
= {
974 .trace
= trace_ctx_print
,
975 .raw
= trace_ctx_raw
,
976 .hex
= trace_ctx_hex
,
977 .binary
= trace_ctxwake_bin
,
980 static struct trace_event trace_ctx_event
= {
982 .funcs
= &trace_ctx_funcs
,
985 static struct trace_event_functions trace_wake_funcs
= {
986 .trace
= trace_wake_print
,
987 .raw
= trace_wake_raw
,
988 .hex
= trace_wake_hex
,
989 .binary
= trace_ctxwake_bin
,
992 static struct trace_event trace_wake_event
= {
994 .funcs
= &trace_wake_funcs
,
999 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1000 int flags
, struct trace_event
*event
)
1002 struct stack_entry
*field
;
1003 struct trace_seq
*s
= &iter
->seq
;
1007 trace_assign_type(field
, iter
->ent
);
1008 end
= (unsigned long *)((long)iter
->ent
+ iter
->ent_size
);
1010 trace_seq_puts(s
, "<stack trace>\n");
1012 for (p
= field
->caller
; p
&& *p
!= ULONG_MAX
&& p
< end
; p
++) {
1014 if (trace_seq_has_overflowed(s
))
1017 trace_seq_puts(s
, " => ");
1018 seq_print_ip_sym(s
, *p
, flags
);
1019 trace_seq_putc(s
, '\n');
1022 return trace_handle_return(s
);
1025 static struct trace_event_functions trace_stack_funcs
= {
1026 .trace
= trace_stack_print
,
1029 static struct trace_event trace_stack_event
= {
1030 .type
= TRACE_STACK
,
1031 .funcs
= &trace_stack_funcs
,
1034 /* TRACE_USER_STACK */
1035 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1036 int flags
, struct trace_event
*event
)
1038 struct userstack_entry
*field
;
1039 struct trace_seq
*s
= &iter
->seq
;
1040 struct mm_struct
*mm
= NULL
;
1043 trace_assign_type(field
, iter
->ent
);
1045 trace_seq_puts(s
, "<user stack trace>\n");
1047 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
1048 struct task_struct
*task
;
1050 * we do the lookup on the thread group leader,
1051 * since individual threads might have already quit!
1054 task
= find_task_by_vpid(field
->tgid
);
1056 mm
= get_task_mm(task
);
1060 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
1061 unsigned long ip
= field
->caller
[i
];
1063 if (ip
== ULONG_MAX
|| trace_seq_has_overflowed(s
))
1066 trace_seq_puts(s
, " => ");
1069 trace_seq_puts(s
, "??");
1070 trace_seq_putc(s
, '\n');
1074 seq_print_user_ip(s
, mm
, ip
, flags
);
1075 trace_seq_putc(s
, '\n');
1081 return trace_handle_return(s
);
1084 static struct trace_event_functions trace_user_stack_funcs
= {
1085 .trace
= trace_user_stack_print
,
1088 static struct trace_event trace_user_stack_event
= {
1089 .type
= TRACE_USER_STACK
,
1090 .funcs
= &trace_user_stack_funcs
,
1094 static enum print_line_t
1095 trace_bputs_print(struct trace_iterator
*iter
, int flags
,
1096 struct trace_event
*event
)
1098 struct trace_entry
*entry
= iter
->ent
;
1099 struct trace_seq
*s
= &iter
->seq
;
1100 struct bputs_entry
*field
;
1102 trace_assign_type(field
, entry
);
1104 seq_print_ip_sym(s
, field
->ip
, flags
);
1105 trace_seq_puts(s
, ": ");
1106 trace_seq_puts(s
, field
->str
);
1108 return trace_handle_return(s
);
1112 static enum print_line_t
1113 trace_bputs_raw(struct trace_iterator
*iter
, int flags
,
1114 struct trace_event
*event
)
1116 struct bputs_entry
*field
;
1117 struct trace_seq
*s
= &iter
->seq
;
1119 trace_assign_type(field
, iter
->ent
);
1121 trace_seq_printf(s
, ": %lx : ", field
->ip
);
1122 trace_seq_puts(s
, field
->str
);
1124 return trace_handle_return(s
);
1127 static struct trace_event_functions trace_bputs_funcs
= {
1128 .trace
= trace_bputs_print
,
1129 .raw
= trace_bputs_raw
,
1132 static struct trace_event trace_bputs_event
= {
1133 .type
= TRACE_BPUTS
,
1134 .funcs
= &trace_bputs_funcs
,
1138 static enum print_line_t
1139 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1140 struct trace_event
*event
)
1142 struct trace_entry
*entry
= iter
->ent
;
1143 struct trace_seq
*s
= &iter
->seq
;
1144 struct bprint_entry
*field
;
1146 trace_assign_type(field
, entry
);
1148 seq_print_ip_sym(s
, field
->ip
, flags
);
1149 trace_seq_puts(s
, ": ");
1150 trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
1152 return trace_handle_return(s
);
1156 static enum print_line_t
1157 trace_bprint_raw(struct trace_iterator
*iter
, int flags
,
1158 struct trace_event
*event
)
1160 struct bprint_entry
*field
;
1161 struct trace_seq
*s
= &iter
->seq
;
1163 trace_assign_type(field
, iter
->ent
);
1165 trace_seq_printf(s
, ": %lx : ", field
->ip
);
1166 trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
1168 return trace_handle_return(s
);
1171 static struct trace_event_functions trace_bprint_funcs
= {
1172 .trace
= trace_bprint_print
,
1173 .raw
= trace_bprint_raw
,
1176 static struct trace_event trace_bprint_event
= {
1177 .type
= TRACE_BPRINT
,
1178 .funcs
= &trace_bprint_funcs
,
1182 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1183 int flags
, struct trace_event
*event
)
1185 struct print_entry
*field
;
1186 struct trace_seq
*s
= &iter
->seq
;
1188 trace_assign_type(field
, iter
->ent
);
1190 seq_print_ip_sym(s
, field
->ip
, flags
);
1191 trace_seq_printf(s
, ": %s", field
->buf
);
1193 return trace_handle_return(s
);
1196 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1197 struct trace_event
*event
)
1199 struct print_entry
*field
;
1201 trace_assign_type(field
, iter
->ent
);
1203 trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
);
1205 return trace_handle_return(&iter
->seq
);
1208 static struct trace_event_functions trace_print_funcs
= {
1209 .trace
= trace_print_print
,
1210 .raw
= trace_print_raw
,
1213 static struct trace_event trace_print_event
= {
1214 .type
= TRACE_PRINT
,
1215 .funcs
= &trace_print_funcs
,
1219 static struct trace_event
*events
[] __initdata
= {
1224 &trace_user_stack_event
,
1226 &trace_bprint_event
,
1231 __init
static int init_events(void)
1233 struct trace_event
*event
;
1236 for (i
= 0; events
[i
]; i
++) {
1239 ret
= register_trace_event(event
);
1241 printk(KERN_WARNING
"event %d failed to register\n",
1249 early_initcall(init_events
);