4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10 #include <linux/ftrace.h>
12 #include "trace_output.h"
14 /* must be a power of 2 */
15 #define EVENT_HASHSIZE 128
17 DECLARE_RWSEM(trace_event_mutex
);
19 static struct hlist_head event_hash
[EVENT_HASHSIZE
] __read_mostly
;
21 static int next_event_type
= __TRACE_LAST_TYPE
+ 1;
23 int trace_print_seq(struct seq_file
*m
, struct trace_seq
*s
)
25 int len
= s
->len
>= PAGE_SIZE
? PAGE_SIZE
- 1 : s
->len
;
28 ret
= seq_write(m
, s
->buffer
, len
);
31 * Only reset this buffer if we successfully wrote to the
40 enum print_line_t
trace_print_bprintk_msg_only(struct trace_iterator
*iter
)
42 struct trace_seq
*s
= &iter
->seq
;
43 struct trace_entry
*entry
= iter
->ent
;
44 struct bprint_entry
*field
;
47 trace_assign_type(field
, entry
);
49 ret
= trace_seq_bprintf(s
, field
->fmt
, field
->buf
);
51 return TRACE_TYPE_PARTIAL_LINE
;
53 return TRACE_TYPE_HANDLED
;
56 enum print_line_t
trace_print_printk_msg_only(struct trace_iterator
*iter
)
58 struct trace_seq
*s
= &iter
->seq
;
59 struct trace_entry
*entry
= iter
->ent
;
60 struct print_entry
*field
;
63 trace_assign_type(field
, entry
);
65 ret
= trace_seq_printf(s
, "%s", field
->buf
);
67 return TRACE_TYPE_PARTIAL_LINE
;
69 return TRACE_TYPE_HANDLED
;
73 * trace_seq_printf - sequence printing of trace information
74 * @s: trace sequence descriptor
75 * @fmt: printf format string
77 * It returns 0 if the trace oversizes the buffer's free
80 * The tracer may use either sequence operations or its own
81 * copy to user routines. To simplify formating of a trace
82 * trace_seq_printf is used to store strings into a special
83 * buffer (@s). Then the output may be either used by
84 * the sequencer or pulled into another buffer.
87 trace_seq_printf(struct trace_seq
*s
, const char *fmt
, ...)
89 int len
= (PAGE_SIZE
- 1) - s
->len
;
97 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, ap
);
100 /* If we can't write it all, don't bother writing anything */
110 EXPORT_SYMBOL_GPL(trace_seq_printf
);
113 * trace_seq_vprintf - sequence printing of trace information
114 * @s: trace sequence descriptor
115 * @fmt: printf format string
117 * The tracer may use either sequence operations or its own
118 * copy to user routines. To simplify formating of a trace
119 * trace_seq_printf is used to store strings into a special
120 * buffer (@s). Then the output may be either used by
121 * the sequencer or pulled into another buffer.
124 trace_seq_vprintf(struct trace_seq
*s
, const char *fmt
, va_list args
)
126 int len
= (PAGE_SIZE
- 1) - s
->len
;
132 ret
= vsnprintf(s
->buffer
+ s
->len
, len
, fmt
, args
);
134 /* If we can't write it all, don't bother writing anything */
144 EXPORT_SYMBOL_GPL(trace_seq_vprintf
);
146 int trace_seq_bprintf(struct trace_seq
*s
, const char *fmt
, const u32
*binary
)
148 int len
= (PAGE_SIZE
- 1) - s
->len
;
154 ret
= bstr_printf(s
->buffer
+ s
->len
, len
, fmt
, binary
);
156 /* If we can't write it all, don't bother writing anything */
168 * trace_seq_puts - trace sequence printing of simple string
169 * @s: trace sequence descriptor
170 * @str: simple string to record
172 * The tracer may use either the sequence operations or its own
173 * copy to user routines. This function records a simple string
174 * into a special buffer (@s) for later retrieval by a sequencer
175 * or other mechanism.
177 int trace_seq_puts(struct trace_seq
*s
, const char *str
)
179 int len
= strlen(str
);
184 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
189 memcpy(s
->buffer
+ s
->len
, str
, len
);
195 int trace_seq_putc(struct trace_seq
*s
, unsigned char c
)
200 if (s
->len
>= (PAGE_SIZE
- 1)) {
205 s
->buffer
[s
->len
++] = c
;
209 EXPORT_SYMBOL(trace_seq_putc
);
211 int trace_seq_putmem(struct trace_seq
*s
, const void *mem
, size_t len
)
216 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
221 memcpy(s
->buffer
+ s
->len
, mem
, len
);
227 int trace_seq_putmem_hex(struct trace_seq
*s
, const void *mem
, size_t len
)
229 unsigned char hex
[HEX_CHARS
];
230 const unsigned char *data
= mem
;
237 for (i
= 0, j
= 0; i
< len
; i
++) {
239 for (i
= len
-1, j
= 0; i
>= 0; i
--) {
241 hex
[j
++] = hex_asc_hi(data
[i
]);
242 hex
[j
++] = hex_asc_lo(data
[i
]);
246 return trace_seq_putmem(s
, hex
, j
);
249 void *trace_seq_reserve(struct trace_seq
*s
, size_t len
)
256 if (len
> ((PAGE_SIZE
- 1) - s
->len
)) {
261 ret
= s
->buffer
+ s
->len
;
267 int trace_seq_path(struct trace_seq
*s
, const struct path
*path
)
274 if (s
->len
>= (PAGE_SIZE
- 1)) {
279 p
= d_path(path
, s
->buffer
+ s
->len
, PAGE_SIZE
- s
->len
);
281 p
= mangle_path(s
->buffer
+ s
->len
, p
, "\n");
283 s
->len
= p
- s
->buffer
;
287 s
->buffer
[s
->len
++] = '?';
296 ftrace_print_flags_seq(struct trace_seq
*p
, const char *delim
,
298 const struct trace_print_flags
*flag_array
)
302 const char *ret
= p
->buffer
+ p
->len
;
305 for (i
= 0; flag_array
[i
].name
&& flags
; i
++) {
307 mask
= flag_array
[i
].mask
;
308 if ((flags
& mask
) != mask
)
311 str
= flag_array
[i
].name
;
314 trace_seq_puts(p
, delim
);
317 trace_seq_puts(p
, str
);
320 /* check for left over flags */
323 trace_seq_puts(p
, delim
);
324 trace_seq_printf(p
, "0x%lx", flags
);
327 trace_seq_putc(p
, 0);
331 EXPORT_SYMBOL(ftrace_print_flags_seq
);
334 ftrace_print_symbols_seq(struct trace_seq
*p
, unsigned long val
,
335 const struct trace_print_flags
*symbol_array
)
338 const char *ret
= p
->buffer
+ p
->len
;
340 for (i
= 0; symbol_array
[i
].name
; i
++) {
342 if (val
!= symbol_array
[i
].mask
)
345 trace_seq_puts(p
, symbol_array
[i
].name
);
349 if (ret
== (const char *)(p
->buffer
+ p
->len
))
350 trace_seq_printf(p
, "0x%lx", val
);
352 trace_seq_putc(p
, 0);
356 EXPORT_SYMBOL(ftrace_print_symbols_seq
);
358 #if BITS_PER_LONG == 32
360 ftrace_print_symbols_seq_u64(struct trace_seq
*p
, unsigned long long val
,
361 const struct trace_print_flags_u64
*symbol_array
)
364 const char *ret
= p
->buffer
+ p
->len
;
366 for (i
= 0; symbol_array
[i
].name
; i
++) {
368 if (val
!= symbol_array
[i
].mask
)
371 trace_seq_puts(p
, symbol_array
[i
].name
);
375 if (ret
== (const char *)(p
->buffer
+ p
->len
))
376 trace_seq_printf(p
, "0x%llx", val
);
378 trace_seq_putc(p
, 0);
382 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64
);
386 ftrace_print_hex_seq(struct trace_seq
*p
, const unsigned char *buf
, int buf_len
)
389 const char *ret
= p
->buffer
+ p
->len
;
391 for (i
= 0; i
< buf_len
; i
++)
392 trace_seq_printf(p
, "%s%2.2x", i
== 0 ? "" : " ", buf
[i
]);
394 trace_seq_putc(p
, 0);
398 EXPORT_SYMBOL(ftrace_print_hex_seq
);
400 #ifdef CONFIG_KRETPROBES
401 static inline const char *kretprobed(const char *name
)
403 static const char tramp_name
[] = "kretprobe_trampoline";
404 int size
= sizeof(tramp_name
);
406 if (strncmp(tramp_name
, name
, size
) == 0)
407 return "[unknown/kretprobe'd]";
411 static inline const char *kretprobed(const char *name
)
415 #endif /* CONFIG_KRETPROBES */
418 seq_print_sym_short(struct trace_seq
*s
, const char *fmt
, unsigned long address
)
420 #ifdef CONFIG_KALLSYMS
421 char str
[KSYM_SYMBOL_LEN
];
424 kallsyms_lookup(address
, NULL
, NULL
, NULL
, str
);
426 name
= kretprobed(str
);
428 return trace_seq_printf(s
, fmt
, name
);
434 seq_print_sym_offset(struct trace_seq
*s
, const char *fmt
,
435 unsigned long address
)
437 #ifdef CONFIG_KALLSYMS
438 char str
[KSYM_SYMBOL_LEN
];
441 sprint_symbol(str
, address
);
442 name
= kretprobed(str
);
444 return trace_seq_printf(s
, fmt
, name
);
450 # define IP_FMT "%08lx"
452 # define IP_FMT "%016lx"
455 int seq_print_user_ip(struct trace_seq
*s
, struct mm_struct
*mm
,
456 unsigned long ip
, unsigned long sym_flags
)
458 struct file
*file
= NULL
;
459 unsigned long vmstart
= 0;
466 const struct vm_area_struct
*vma
;
468 down_read(&mm
->mmap_sem
);
469 vma
= find_vma(mm
, ip
);
472 vmstart
= vma
->vm_start
;
475 ret
= trace_seq_path(s
, &file
->f_path
);
477 ret
= trace_seq_printf(s
, "[+0x%lx]",
480 up_read(&mm
->mmap_sem
);
482 if (ret
&& ((sym_flags
& TRACE_ITER_SYM_ADDR
) || !file
))
483 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
488 seq_print_userip_objs(const struct userstack_entry
*entry
, struct trace_seq
*s
,
489 unsigned long sym_flags
)
491 struct mm_struct
*mm
= NULL
;
495 if (trace_flags
& TRACE_ITER_SYM_USEROBJ
) {
496 struct task_struct
*task
;
498 * we do the lookup on the thread group leader,
499 * since individual threads might have already quit!
502 task
= find_task_by_vpid(entry
->tgid
);
504 mm
= get_task_mm(task
);
508 for (i
= 0; i
< FTRACE_STACK_ENTRIES
; i
++) {
509 unsigned long ip
= entry
->caller
[i
];
511 if (ip
== ULONG_MAX
|| !ret
)
514 ret
= trace_seq_puts(s
, " => ");
517 ret
= trace_seq_puts(s
, "??");
519 ret
= trace_seq_puts(s
, "\n");
525 ret
= seq_print_user_ip(s
, mm
, ip
, sym_flags
);
526 ret
= trace_seq_puts(s
, "\n");
535 seq_print_ip_sym(struct trace_seq
*s
, unsigned long ip
, unsigned long sym_flags
)
540 return trace_seq_printf(s
, "0");
542 if (sym_flags
& TRACE_ITER_SYM_OFFSET
)
543 ret
= seq_print_sym_offset(s
, "%s", ip
);
545 ret
= seq_print_sym_short(s
, "%s", ip
);
550 if (sym_flags
& TRACE_ITER_SYM_ADDR
)
551 ret
= trace_seq_printf(s
, " <" IP_FMT
">", ip
);
556 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
557 * @s: trace seq struct to write to
558 * @entry: The trace entry field from the ring buffer
560 * Prints the generic fields of irqs off, in hard or softirq, preempt
563 int trace_print_lat_fmt(struct trace_seq
*s
, struct trace_entry
*entry
)
572 hardirq
= entry
->flags
& TRACE_FLAG_HARDIRQ
;
573 softirq
= entry
->flags
& TRACE_FLAG_SOFTIRQ
;
576 (entry
->flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
577 (entry
->flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ? 'X' :
580 (entry
->flags
& TRACE_FLAG_NEED_RESCHED
) ? 'N' : '.';
582 (hardirq
&& softirq
) ? 'H' :
587 if (!trace_seq_printf(s
, "%c%c%c",
588 irqs_off
, need_resched
, hardsoft_irq
))
591 if (entry
->preempt_count
)
592 ret
= trace_seq_printf(s
, "%x", entry
->preempt_count
);
594 ret
= trace_seq_putc(s
, '.');
600 lat_print_generic(struct trace_seq
*s
, struct trace_entry
*entry
, int cpu
)
602 char comm
[TASK_COMM_LEN
];
604 trace_find_cmdline(entry
->pid
, comm
);
606 if (!trace_seq_printf(s
, "%8.8s-%-5d %3d",
607 comm
, entry
->pid
, cpu
))
610 return trace_print_lat_fmt(s
, entry
);
613 static unsigned long preempt_mark_thresh
= 100;
616 lat_print_timestamp(struct trace_seq
*s
, u64 abs_usecs
,
617 unsigned long rel_usecs
)
619 return trace_seq_printf(s
, " %4lldus%c: ", abs_usecs
,
620 rel_usecs
> preempt_mark_thresh
? '!' :
621 rel_usecs
> 1 ? '+' : ' ');
624 int trace_print_context(struct trace_iterator
*iter
)
626 struct trace_seq
*s
= &iter
->seq
;
627 struct trace_entry
*entry
= iter
->ent
;
628 unsigned long long t
= ns2usecs(iter
->ts
);
629 unsigned long usec_rem
= do_div(t
, USEC_PER_SEC
);
630 unsigned long secs
= (unsigned long)t
;
631 char comm
[TASK_COMM_LEN
];
634 trace_find_cmdline(entry
->pid
, comm
);
636 ret
= trace_seq_printf(s
, "%16s-%-5d [%03d] ",
637 comm
, entry
->pid
, iter
->cpu
);
641 if (trace_flags
& TRACE_ITER_IRQ_INFO
) {
642 ret
= trace_print_lat_fmt(s
, entry
);
647 return trace_seq_printf(s
, " %5lu.%06lu: ",
651 int trace_print_lat_context(struct trace_iterator
*iter
)
655 struct trace_seq
*s
= &iter
->seq
;
656 struct trace_entry
*entry
= iter
->ent
,
657 *next_entry
= trace_find_next_entry(iter
, NULL
,
659 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
660 unsigned long abs_usecs
= ns2usecs(iter
->ts
- iter
->tr
->time_start
);
661 unsigned long rel_usecs
;
665 rel_usecs
= ns2usecs(next_ts
- iter
->ts
);
668 char comm
[TASK_COMM_LEN
];
670 trace_find_cmdline(entry
->pid
, comm
);
672 ret
= trace_seq_printf(s
, "%16s %5d %3d %d %08x %08lx [%08llx]"
673 " %ld.%03ldms (+%ld.%03ldms): ", comm
,
674 entry
->pid
, iter
->cpu
, entry
->flags
,
675 entry
->preempt_count
, iter
->idx
,
677 abs_usecs
/ USEC_PER_MSEC
,
678 abs_usecs
% USEC_PER_MSEC
,
679 rel_usecs
/ USEC_PER_MSEC
,
680 rel_usecs
% USEC_PER_MSEC
);
682 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
684 ret
= lat_print_timestamp(s
, abs_usecs
, rel_usecs
);
690 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
692 static int task_state_char(unsigned long state
)
694 int bit
= state
? __ffs(state
) + 1 : 0;
696 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
700 * ftrace_find_event - find a registered event
701 * @type: the type of event to look for
703 * Returns an event of type @type otherwise NULL
704 * Called with trace_event_read_lock() held.
706 struct trace_event
*ftrace_find_event(int type
)
708 struct trace_event
*event
;
709 struct hlist_node
*n
;
712 key
= type
& (EVENT_HASHSIZE
- 1);
714 hlist_for_each_entry(event
, n
, &event_hash
[key
], node
) {
715 if (event
->type
== type
)
722 static LIST_HEAD(ftrace_event_list
);
724 static int trace_search_list(struct list_head
**list
)
726 struct trace_event
*e
;
727 int last
= __TRACE_LAST_TYPE
;
729 if (list_empty(&ftrace_event_list
)) {
730 *list
= &ftrace_event_list
;
735 * We used up all possible max events,
736 * lets see if somebody freed one.
738 list_for_each_entry(e
, &ftrace_event_list
, list
) {
739 if (e
->type
!= last
+ 1)
744 /* Did we used up all 65 thousand events??? */
745 if ((last
+ 1) > FTRACE_MAX_EVENT
)
752 void trace_event_read_lock(void)
754 down_read(&trace_event_mutex
);
757 void trace_event_read_unlock(void)
759 up_read(&trace_event_mutex
);
763 * register_ftrace_event - register output for an event type
764 * @event: the event type to register
766 * Event types are stored in a hash and this hash is used to
767 * find a way to print an event. If the @event->type is set
768 * then it will use that type, otherwise it will assign a
771 * If you assign your own type, please make sure it is added
772 * to the trace_type enum in trace.h, to avoid collisions
773 * with the dynamic types.
775 * Returns the event type number or zero on error.
777 int register_ftrace_event(struct trace_event
*event
)
782 down_write(&trace_event_mutex
);
787 if (WARN_ON(!event
->funcs
))
790 INIT_LIST_HEAD(&event
->list
);
793 struct list_head
*list
= NULL
;
795 if (next_event_type
> FTRACE_MAX_EVENT
) {
797 event
->type
= trace_search_list(&list
);
803 event
->type
= next_event_type
++;
804 list
= &ftrace_event_list
;
807 if (WARN_ON(ftrace_find_event(event
->type
)))
810 list_add_tail(&event
->list
, list
);
812 } else if (event
->type
> __TRACE_LAST_TYPE
) {
813 printk(KERN_WARNING
"Need to add type to trace.h\n");
817 /* Is this event already used */
818 if (ftrace_find_event(event
->type
))
822 if (event
->funcs
->trace
== NULL
)
823 event
->funcs
->trace
= trace_nop_print
;
824 if (event
->funcs
->raw
== NULL
)
825 event
->funcs
->raw
= trace_nop_print
;
826 if (event
->funcs
->hex
== NULL
)
827 event
->funcs
->hex
= trace_nop_print
;
828 if (event
->funcs
->binary
== NULL
)
829 event
->funcs
->binary
= trace_nop_print
;
831 key
= event
->type
& (EVENT_HASHSIZE
- 1);
833 hlist_add_head(&event
->node
, &event_hash
[key
]);
837 up_write(&trace_event_mutex
);
841 EXPORT_SYMBOL_GPL(register_ftrace_event
);
844 * Used by module code with the trace_event_mutex held for write.
846 int __unregister_ftrace_event(struct trace_event
*event
)
848 hlist_del(&event
->node
);
849 list_del(&event
->list
);
854 * unregister_ftrace_event - remove a no longer used event
855 * @event: the event to remove
857 int unregister_ftrace_event(struct trace_event
*event
)
859 down_write(&trace_event_mutex
);
860 __unregister_ftrace_event(event
);
861 up_write(&trace_event_mutex
);
865 EXPORT_SYMBOL_GPL(unregister_ftrace_event
);
871 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
872 struct trace_event
*event
)
874 if (!trace_seq_printf(&iter
->seq
, "type: %d\n", iter
->ent
->type
))
875 return TRACE_TYPE_PARTIAL_LINE
;
877 return TRACE_TYPE_HANDLED
;
881 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
882 struct trace_event
*event
)
884 struct ftrace_entry
*field
;
885 struct trace_seq
*s
= &iter
->seq
;
887 trace_assign_type(field
, iter
->ent
);
889 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
892 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
893 if (!trace_seq_printf(s
, " <-"))
895 if (!seq_print_ip_sym(s
,
900 if (!trace_seq_printf(s
, "\n"))
903 return TRACE_TYPE_HANDLED
;
906 return TRACE_TYPE_PARTIAL_LINE
;
909 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
910 struct trace_event
*event
)
912 struct ftrace_entry
*field
;
914 trace_assign_type(field
, iter
->ent
);
916 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
919 return TRACE_TYPE_PARTIAL_LINE
;
921 return TRACE_TYPE_HANDLED
;
924 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
925 struct trace_event
*event
)
927 struct ftrace_entry
*field
;
928 struct trace_seq
*s
= &iter
->seq
;
930 trace_assign_type(field
, iter
->ent
);
932 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
933 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
935 return TRACE_TYPE_HANDLED
;
938 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
939 struct trace_event
*event
)
941 struct ftrace_entry
*field
;
942 struct trace_seq
*s
= &iter
->seq
;
944 trace_assign_type(field
, iter
->ent
);
946 SEQ_PUT_FIELD_RET(s
, field
->ip
);
947 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
949 return TRACE_TYPE_HANDLED
;
952 static struct trace_event_functions trace_fn_funcs
= {
953 .trace
= trace_fn_trace
,
956 .binary
= trace_fn_bin
,
959 static struct trace_event trace_fn_event
= {
961 .funcs
= &trace_fn_funcs
,
964 /* TRACE_CTX an TRACE_WAKE */
965 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
968 struct ctx_switch_entry
*field
;
969 char comm
[TASK_COMM_LEN
];
973 trace_assign_type(field
, iter
->ent
);
975 T
= task_state_char(field
->next_state
);
976 S
= task_state_char(field
->prev_state
);
977 trace_find_cmdline(field
->next_pid
, comm
);
978 if (!trace_seq_printf(&iter
->seq
,
979 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
987 return TRACE_TYPE_PARTIAL_LINE
;
989 return TRACE_TYPE_HANDLED
;
992 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
993 struct trace_event
*event
)
995 return trace_ctxwake_print(iter
, "==>");
998 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
999 int flags
, struct trace_event
*event
)
1001 return trace_ctxwake_print(iter
, " +");
1004 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
1006 struct ctx_switch_entry
*field
;
1009 trace_assign_type(field
, iter
->ent
);
1012 S
= task_state_char(field
->prev_state
);
1013 T
= task_state_char(field
->next_state
);
1014 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
1022 return TRACE_TYPE_PARTIAL_LINE
;
1024 return TRACE_TYPE_HANDLED
;
1027 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
1028 struct trace_event
*event
)
1030 return trace_ctxwake_raw(iter
, 0);
1033 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
1034 struct trace_event
*event
)
1036 return trace_ctxwake_raw(iter
, '+');
1040 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
1042 struct ctx_switch_entry
*field
;
1043 struct trace_seq
*s
= &iter
->seq
;
1046 trace_assign_type(field
, iter
->ent
);
1049 S
= task_state_char(field
->prev_state
);
1050 T
= task_state_char(field
->next_state
);
1052 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
1053 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
1054 SEQ_PUT_HEX_FIELD_RET(s
, S
);
1055 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
1056 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
1057 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
1058 SEQ_PUT_HEX_FIELD_RET(s
, T
);
1060 return TRACE_TYPE_HANDLED
;
1063 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
1064 struct trace_event
*event
)
1066 return trace_ctxwake_hex(iter
, 0);
1069 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
1070 struct trace_event
*event
)
1072 return trace_ctxwake_hex(iter
, '+');
1075 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
1076 int flags
, struct trace_event
*event
)
1078 struct ctx_switch_entry
*field
;
1079 struct trace_seq
*s
= &iter
->seq
;
1081 trace_assign_type(field
, iter
->ent
);
1083 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
1084 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
1085 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
1086 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
1087 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
1088 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
1090 return TRACE_TYPE_HANDLED
;
1093 static struct trace_event_functions trace_ctx_funcs
= {
1094 .trace
= trace_ctx_print
,
1095 .raw
= trace_ctx_raw
,
1096 .hex
= trace_ctx_hex
,
1097 .binary
= trace_ctxwake_bin
,
1100 static struct trace_event trace_ctx_event
= {
1102 .funcs
= &trace_ctx_funcs
,
1105 static struct trace_event_functions trace_wake_funcs
= {
1106 .trace
= trace_wake_print
,
1107 .raw
= trace_wake_raw
,
1108 .hex
= trace_wake_hex
,
1109 .binary
= trace_ctxwake_bin
,
1112 static struct trace_event trace_wake_event
= {
1114 .funcs
= &trace_wake_funcs
,
1119 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1120 int flags
, struct trace_event
*event
)
1122 struct stack_entry
*field
;
1123 struct trace_seq
*s
= &iter
->seq
;
1127 trace_assign_type(field
, iter
->ent
);
1128 end
= (unsigned long *)((long)iter
->ent
+ iter
->ent_size
);
1130 if (!trace_seq_puts(s
, "<stack trace>\n"))
1133 for (p
= field
->caller
; p
&& *p
!= ULONG_MAX
&& p
< end
; p
++) {
1134 if (!trace_seq_puts(s
, " => "))
1137 if (!seq_print_ip_sym(s
, *p
, flags
))
1139 if (!trace_seq_puts(s
, "\n"))
1143 return TRACE_TYPE_HANDLED
;
1146 return TRACE_TYPE_PARTIAL_LINE
;
1149 static struct trace_event_functions trace_stack_funcs
= {
1150 .trace
= trace_stack_print
,
1153 static struct trace_event trace_stack_event
= {
1154 .type
= TRACE_STACK
,
1155 .funcs
= &trace_stack_funcs
,
1158 /* TRACE_USER_STACK */
1159 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1160 int flags
, struct trace_event
*event
)
1162 struct userstack_entry
*field
;
1163 struct trace_seq
*s
= &iter
->seq
;
1165 trace_assign_type(field
, iter
->ent
);
1167 if (!trace_seq_puts(s
, "<user stack trace>\n"))
1170 if (!seq_print_userip_objs(field
, s
, flags
))
1173 return TRACE_TYPE_HANDLED
;
1176 return TRACE_TYPE_PARTIAL_LINE
;
1179 static struct trace_event_functions trace_user_stack_funcs
= {
1180 .trace
= trace_user_stack_print
,
1183 static struct trace_event trace_user_stack_event
= {
1184 .type
= TRACE_USER_STACK
,
1185 .funcs
= &trace_user_stack_funcs
,
1189 static enum print_line_t
1190 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1191 struct trace_event
*event
)
1193 struct trace_entry
*entry
= iter
->ent
;
1194 struct trace_seq
*s
= &iter
->seq
;
1195 struct bprint_entry
*field
;
1197 trace_assign_type(field
, entry
);
1199 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1202 if (!trace_seq_puts(s
, ": "))
1205 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1208 return TRACE_TYPE_HANDLED
;
1211 return TRACE_TYPE_PARTIAL_LINE
;
1215 static enum print_line_t
1216 trace_bprint_raw(struct trace_iterator
*iter
, int flags
,
1217 struct trace_event
*event
)
1219 struct bprint_entry
*field
;
1220 struct trace_seq
*s
= &iter
->seq
;
1222 trace_assign_type(field
, iter
->ent
);
1224 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
1227 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1230 return TRACE_TYPE_HANDLED
;
1233 return TRACE_TYPE_PARTIAL_LINE
;
1236 static struct trace_event_functions trace_bprint_funcs
= {
1237 .trace
= trace_bprint_print
,
1238 .raw
= trace_bprint_raw
,
1241 static struct trace_event trace_bprint_event
= {
1242 .type
= TRACE_BPRINT
,
1243 .funcs
= &trace_bprint_funcs
,
1247 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1248 int flags
, struct trace_event
*event
)
1250 struct print_entry
*field
;
1251 struct trace_seq
*s
= &iter
->seq
;
1253 trace_assign_type(field
, iter
->ent
);
1255 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1258 if (!trace_seq_printf(s
, ": %s", field
->buf
))
1261 return TRACE_TYPE_HANDLED
;
1264 return TRACE_TYPE_PARTIAL_LINE
;
1267 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1268 struct trace_event
*event
)
1270 struct print_entry
*field
;
1272 trace_assign_type(field
, iter
->ent
);
1274 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
1277 return TRACE_TYPE_HANDLED
;
1280 return TRACE_TYPE_PARTIAL_LINE
;
1283 static struct trace_event_functions trace_print_funcs
= {
1284 .trace
= trace_print_print
,
1285 .raw
= trace_print_raw
,
1288 static struct trace_event trace_print_event
= {
1289 .type
= TRACE_PRINT
,
1290 .funcs
= &trace_print_funcs
,
1294 static struct trace_event
*events
[] __initdata
= {
1299 &trace_user_stack_event
,
1300 &trace_bprint_event
,
1305 __init
static int init_events(void)
1307 struct trace_event
*event
;
1310 for (i
= 0; events
[i
]; i
++) {
1313 ret
= register_ftrace_event(event
);
1315 printk(KERN_WARNING
"event %d failed to register\n",
1323 device_initcall(init_events
);