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_us
= 100;
616 lat_print_timestamp(struct trace_iterator
*iter
, u64 next_ts
)
618 unsigned long verbose
= trace_flags
& TRACE_ITER_VERBOSE
;
619 unsigned long in_ns
= iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
;
620 unsigned long long abs_ts
= iter
->ts
- iter
->tr
->time_start
;
621 unsigned long long rel_ts
= next_ts
- iter
->ts
;
622 struct trace_seq
*s
= &iter
->seq
;
625 abs_ts
= ns2usecs(abs_ts
);
626 rel_ts
= ns2usecs(rel_ts
);
629 if (verbose
&& in_ns
) {
630 unsigned long abs_usec
= do_div(abs_ts
, USEC_PER_MSEC
);
631 unsigned long abs_msec
= (unsigned long)abs_ts
;
632 unsigned long rel_usec
= do_div(rel_ts
, USEC_PER_MSEC
);
633 unsigned long rel_msec
= (unsigned long)rel_ts
;
635 return trace_seq_printf(
636 s
, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
640 } else if (verbose
&& !in_ns
) {
641 return trace_seq_printf(
642 s
, "[%016llx] %lld (+%lld): ",
643 iter
->ts
, abs_ts
, rel_ts
);
644 } else if (!verbose
&& in_ns
) {
645 return trace_seq_printf(
648 rel_ts
> preempt_mark_thresh_us
? '!' :
649 rel_ts
> 1 ? '+' : ' ');
650 } else { /* !verbose && !in_ns */
651 return trace_seq_printf(s
, " %4lld: ", abs_ts
);
655 int trace_print_context(struct trace_iterator
*iter
)
657 struct trace_seq
*s
= &iter
->seq
;
658 struct trace_entry
*entry
= iter
->ent
;
659 unsigned long long t
;
660 unsigned long secs
, usec_rem
;
661 char comm
[TASK_COMM_LEN
];
664 trace_find_cmdline(entry
->pid
, comm
);
666 ret
= trace_seq_printf(s
, "%16s-%-5d [%03d] ",
667 comm
, entry
->pid
, iter
->cpu
);
671 if (trace_flags
& TRACE_ITER_IRQ_INFO
) {
672 ret
= trace_print_lat_fmt(s
, entry
);
677 if (iter
->iter_flags
& TRACE_FILE_TIME_IN_NS
) {
678 t
= ns2usecs(iter
->ts
);
679 usec_rem
= do_div(t
, USEC_PER_SEC
);
680 secs
= (unsigned long)t
;
681 return trace_seq_printf(s
, " %5lu.%06lu: ", secs
, usec_rem
);
683 return trace_seq_printf(s
, " %12llu: ", iter
->ts
);
686 int trace_print_lat_context(struct trace_iterator
*iter
)
690 /* trace_find_next_entry will reset ent_size */
691 int ent_size
= iter
->ent_size
;
692 struct trace_seq
*s
= &iter
->seq
;
693 struct trace_entry
*entry
= iter
->ent
,
694 *next_entry
= trace_find_next_entry(iter
, NULL
,
696 unsigned long verbose
= (trace_flags
& TRACE_ITER_VERBOSE
);
698 /* Restore the original ent_size */
699 iter
->ent_size
= ent_size
;
705 char comm
[TASK_COMM_LEN
];
707 trace_find_cmdline(entry
->pid
, comm
);
709 ret
= trace_seq_printf(
710 s
, "%16s %5d %3d %d %08x %08lx ",
711 comm
, entry
->pid
, iter
->cpu
, entry
->flags
,
712 entry
->preempt_count
, iter
->idx
);
714 ret
= lat_print_generic(s
, entry
, iter
->cpu
);
718 ret
= lat_print_timestamp(iter
, next_ts
);
723 static const char state_to_char
[] = TASK_STATE_TO_CHAR_STR
;
725 static int task_state_char(unsigned long state
)
727 int bit
= state
? __ffs(state
) + 1 : 0;
729 return bit
< sizeof(state_to_char
) - 1 ? state_to_char
[bit
] : '?';
733 * ftrace_find_event - find a registered event
734 * @type: the type of event to look for
736 * Returns an event of type @type otherwise NULL
737 * Called with trace_event_read_lock() held.
739 struct trace_event
*ftrace_find_event(int type
)
741 struct trace_event
*event
;
744 key
= type
& (EVENT_HASHSIZE
- 1);
746 hlist_for_each_entry(event
, &event_hash
[key
], node
) {
747 if (event
->type
== type
)
754 static LIST_HEAD(ftrace_event_list
);
756 static int trace_search_list(struct list_head
**list
)
758 struct trace_event
*e
;
759 int last
= __TRACE_LAST_TYPE
;
761 if (list_empty(&ftrace_event_list
)) {
762 *list
= &ftrace_event_list
;
767 * We used up all possible max events,
768 * lets see if somebody freed one.
770 list_for_each_entry(e
, &ftrace_event_list
, list
) {
771 if (e
->type
!= last
+ 1)
776 /* Did we used up all 65 thousand events??? */
777 if ((last
+ 1) > FTRACE_MAX_EVENT
)
784 void trace_event_read_lock(void)
786 down_read(&trace_event_mutex
);
789 void trace_event_read_unlock(void)
791 up_read(&trace_event_mutex
);
795 * register_ftrace_event - register output for an event type
796 * @event: the event type to register
798 * Event types are stored in a hash and this hash is used to
799 * find a way to print an event. If the @event->type is set
800 * then it will use that type, otherwise it will assign a
803 * If you assign your own type, please make sure it is added
804 * to the trace_type enum in trace.h, to avoid collisions
805 * with the dynamic types.
807 * Returns the event type number or zero on error.
809 int register_ftrace_event(struct trace_event
*event
)
814 down_write(&trace_event_mutex
);
819 if (WARN_ON(!event
->funcs
))
822 INIT_LIST_HEAD(&event
->list
);
825 struct list_head
*list
= NULL
;
827 if (next_event_type
> FTRACE_MAX_EVENT
) {
829 event
->type
= trace_search_list(&list
);
835 event
->type
= next_event_type
++;
836 list
= &ftrace_event_list
;
839 if (WARN_ON(ftrace_find_event(event
->type
)))
842 list_add_tail(&event
->list
, list
);
844 } else if (event
->type
> __TRACE_LAST_TYPE
) {
845 printk(KERN_WARNING
"Need to add type to trace.h\n");
849 /* Is this event already used */
850 if (ftrace_find_event(event
->type
))
854 if (event
->funcs
->trace
== NULL
)
855 event
->funcs
->trace
= trace_nop_print
;
856 if (event
->funcs
->raw
== NULL
)
857 event
->funcs
->raw
= trace_nop_print
;
858 if (event
->funcs
->hex
== NULL
)
859 event
->funcs
->hex
= trace_nop_print
;
860 if (event
->funcs
->binary
== NULL
)
861 event
->funcs
->binary
= trace_nop_print
;
863 key
= event
->type
& (EVENT_HASHSIZE
- 1);
865 hlist_add_head(&event
->node
, &event_hash
[key
]);
869 up_write(&trace_event_mutex
);
873 EXPORT_SYMBOL_GPL(register_ftrace_event
);
876 * Used by module code with the trace_event_mutex held for write.
878 int __unregister_ftrace_event(struct trace_event
*event
)
880 hlist_del(&event
->node
);
881 list_del(&event
->list
);
886 * unregister_ftrace_event - remove a no longer used event
887 * @event: the event to remove
889 int unregister_ftrace_event(struct trace_event
*event
)
891 down_write(&trace_event_mutex
);
892 __unregister_ftrace_event(event
);
893 up_write(&trace_event_mutex
);
897 EXPORT_SYMBOL_GPL(unregister_ftrace_event
);
903 enum print_line_t
trace_nop_print(struct trace_iterator
*iter
, int flags
,
904 struct trace_event
*event
)
906 if (!trace_seq_printf(&iter
->seq
, "type: %d\n", iter
->ent
->type
))
907 return TRACE_TYPE_PARTIAL_LINE
;
909 return TRACE_TYPE_HANDLED
;
913 static enum print_line_t
trace_fn_trace(struct trace_iterator
*iter
, int flags
,
914 struct trace_event
*event
)
916 struct ftrace_entry
*field
;
917 struct trace_seq
*s
= &iter
->seq
;
919 trace_assign_type(field
, iter
->ent
);
921 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
924 if ((flags
& TRACE_ITER_PRINT_PARENT
) && field
->parent_ip
) {
925 if (!trace_seq_printf(s
, " <-"))
927 if (!seq_print_ip_sym(s
,
932 if (!trace_seq_printf(s
, "\n"))
935 return TRACE_TYPE_HANDLED
;
938 return TRACE_TYPE_PARTIAL_LINE
;
941 static enum print_line_t
trace_fn_raw(struct trace_iterator
*iter
, int flags
,
942 struct trace_event
*event
)
944 struct ftrace_entry
*field
;
946 trace_assign_type(field
, iter
->ent
);
948 if (!trace_seq_printf(&iter
->seq
, "%lx %lx\n",
951 return TRACE_TYPE_PARTIAL_LINE
;
953 return TRACE_TYPE_HANDLED
;
956 static enum print_line_t
trace_fn_hex(struct trace_iterator
*iter
, int flags
,
957 struct trace_event
*event
)
959 struct ftrace_entry
*field
;
960 struct trace_seq
*s
= &iter
->seq
;
962 trace_assign_type(field
, iter
->ent
);
964 SEQ_PUT_HEX_FIELD_RET(s
, field
->ip
);
965 SEQ_PUT_HEX_FIELD_RET(s
, field
->parent_ip
);
967 return TRACE_TYPE_HANDLED
;
970 static enum print_line_t
trace_fn_bin(struct trace_iterator
*iter
, int flags
,
971 struct trace_event
*event
)
973 struct ftrace_entry
*field
;
974 struct trace_seq
*s
= &iter
->seq
;
976 trace_assign_type(field
, iter
->ent
);
978 SEQ_PUT_FIELD_RET(s
, field
->ip
);
979 SEQ_PUT_FIELD_RET(s
, field
->parent_ip
);
981 return TRACE_TYPE_HANDLED
;
984 static struct trace_event_functions trace_fn_funcs
= {
985 .trace
= trace_fn_trace
,
988 .binary
= trace_fn_bin
,
991 static struct trace_event trace_fn_event
= {
993 .funcs
= &trace_fn_funcs
,
996 /* TRACE_CTX an TRACE_WAKE */
997 static enum print_line_t
trace_ctxwake_print(struct trace_iterator
*iter
,
1000 struct ctx_switch_entry
*field
;
1001 char comm
[TASK_COMM_LEN
];
1005 trace_assign_type(field
, iter
->ent
);
1007 T
= task_state_char(field
->next_state
);
1008 S
= task_state_char(field
->prev_state
);
1009 trace_find_cmdline(field
->next_pid
, comm
);
1010 if (!trace_seq_printf(&iter
->seq
,
1011 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1019 return TRACE_TYPE_PARTIAL_LINE
;
1021 return TRACE_TYPE_HANDLED
;
1024 static enum print_line_t
trace_ctx_print(struct trace_iterator
*iter
, int flags
,
1025 struct trace_event
*event
)
1027 return trace_ctxwake_print(iter
, "==>");
1030 static enum print_line_t
trace_wake_print(struct trace_iterator
*iter
,
1031 int flags
, struct trace_event
*event
)
1033 return trace_ctxwake_print(iter
, " +");
1036 static int trace_ctxwake_raw(struct trace_iterator
*iter
, char S
)
1038 struct ctx_switch_entry
*field
;
1041 trace_assign_type(field
, iter
->ent
);
1044 S
= task_state_char(field
->prev_state
);
1045 T
= task_state_char(field
->next_state
);
1046 if (!trace_seq_printf(&iter
->seq
, "%d %d %c %d %d %d %c\n",
1054 return TRACE_TYPE_PARTIAL_LINE
;
1056 return TRACE_TYPE_HANDLED
;
1059 static enum print_line_t
trace_ctx_raw(struct trace_iterator
*iter
, int flags
,
1060 struct trace_event
*event
)
1062 return trace_ctxwake_raw(iter
, 0);
1065 static enum print_line_t
trace_wake_raw(struct trace_iterator
*iter
, int flags
,
1066 struct trace_event
*event
)
1068 return trace_ctxwake_raw(iter
, '+');
1072 static int trace_ctxwake_hex(struct trace_iterator
*iter
, char S
)
1074 struct ctx_switch_entry
*field
;
1075 struct trace_seq
*s
= &iter
->seq
;
1078 trace_assign_type(field
, iter
->ent
);
1081 S
= task_state_char(field
->prev_state
);
1082 T
= task_state_char(field
->next_state
);
1084 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_pid
);
1085 SEQ_PUT_HEX_FIELD_RET(s
, field
->prev_prio
);
1086 SEQ_PUT_HEX_FIELD_RET(s
, S
);
1087 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_cpu
);
1088 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_pid
);
1089 SEQ_PUT_HEX_FIELD_RET(s
, field
->next_prio
);
1090 SEQ_PUT_HEX_FIELD_RET(s
, T
);
1092 return TRACE_TYPE_HANDLED
;
1095 static enum print_line_t
trace_ctx_hex(struct trace_iterator
*iter
, int flags
,
1096 struct trace_event
*event
)
1098 return trace_ctxwake_hex(iter
, 0);
1101 static enum print_line_t
trace_wake_hex(struct trace_iterator
*iter
, int flags
,
1102 struct trace_event
*event
)
1104 return trace_ctxwake_hex(iter
, '+');
1107 static enum print_line_t
trace_ctxwake_bin(struct trace_iterator
*iter
,
1108 int flags
, struct trace_event
*event
)
1110 struct ctx_switch_entry
*field
;
1111 struct trace_seq
*s
= &iter
->seq
;
1113 trace_assign_type(field
, iter
->ent
);
1115 SEQ_PUT_FIELD_RET(s
, field
->prev_pid
);
1116 SEQ_PUT_FIELD_RET(s
, field
->prev_prio
);
1117 SEQ_PUT_FIELD_RET(s
, field
->prev_state
);
1118 SEQ_PUT_FIELD_RET(s
, field
->next_pid
);
1119 SEQ_PUT_FIELD_RET(s
, field
->next_prio
);
1120 SEQ_PUT_FIELD_RET(s
, field
->next_state
);
1122 return TRACE_TYPE_HANDLED
;
1125 static struct trace_event_functions trace_ctx_funcs
= {
1126 .trace
= trace_ctx_print
,
1127 .raw
= trace_ctx_raw
,
1128 .hex
= trace_ctx_hex
,
1129 .binary
= trace_ctxwake_bin
,
1132 static struct trace_event trace_ctx_event
= {
1134 .funcs
= &trace_ctx_funcs
,
1137 static struct trace_event_functions trace_wake_funcs
= {
1138 .trace
= trace_wake_print
,
1139 .raw
= trace_wake_raw
,
1140 .hex
= trace_wake_hex
,
1141 .binary
= trace_ctxwake_bin
,
1144 static struct trace_event trace_wake_event
= {
1146 .funcs
= &trace_wake_funcs
,
1151 static enum print_line_t
trace_stack_print(struct trace_iterator
*iter
,
1152 int flags
, struct trace_event
*event
)
1154 struct stack_entry
*field
;
1155 struct trace_seq
*s
= &iter
->seq
;
1159 trace_assign_type(field
, iter
->ent
);
1160 end
= (unsigned long *)((long)iter
->ent
+ iter
->ent_size
);
1162 if (!trace_seq_puts(s
, "<stack trace>\n"))
1165 for (p
= field
->caller
; p
&& *p
!= ULONG_MAX
&& p
< end
; p
++) {
1166 if (!trace_seq_puts(s
, " => "))
1169 if (!seq_print_ip_sym(s
, *p
, flags
))
1171 if (!trace_seq_puts(s
, "\n"))
1175 return TRACE_TYPE_HANDLED
;
1178 return TRACE_TYPE_PARTIAL_LINE
;
1181 static struct trace_event_functions trace_stack_funcs
= {
1182 .trace
= trace_stack_print
,
1185 static struct trace_event trace_stack_event
= {
1186 .type
= TRACE_STACK
,
1187 .funcs
= &trace_stack_funcs
,
1190 /* TRACE_USER_STACK */
1191 static enum print_line_t
trace_user_stack_print(struct trace_iterator
*iter
,
1192 int flags
, struct trace_event
*event
)
1194 struct userstack_entry
*field
;
1195 struct trace_seq
*s
= &iter
->seq
;
1197 trace_assign_type(field
, iter
->ent
);
1199 if (!trace_seq_puts(s
, "<user stack trace>\n"))
1202 if (!seq_print_userip_objs(field
, s
, flags
))
1205 return TRACE_TYPE_HANDLED
;
1208 return TRACE_TYPE_PARTIAL_LINE
;
1211 static struct trace_event_functions trace_user_stack_funcs
= {
1212 .trace
= trace_user_stack_print
,
1215 static struct trace_event trace_user_stack_event
= {
1216 .type
= TRACE_USER_STACK
,
1217 .funcs
= &trace_user_stack_funcs
,
1221 static enum print_line_t
1222 trace_bprint_print(struct trace_iterator
*iter
, int flags
,
1223 struct trace_event
*event
)
1225 struct trace_entry
*entry
= iter
->ent
;
1226 struct trace_seq
*s
= &iter
->seq
;
1227 struct bprint_entry
*field
;
1229 trace_assign_type(field
, entry
);
1231 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1234 if (!trace_seq_puts(s
, ": "))
1237 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1240 return TRACE_TYPE_HANDLED
;
1243 return TRACE_TYPE_PARTIAL_LINE
;
1247 static enum print_line_t
1248 trace_bprint_raw(struct trace_iterator
*iter
, int flags
,
1249 struct trace_event
*event
)
1251 struct bprint_entry
*field
;
1252 struct trace_seq
*s
= &iter
->seq
;
1254 trace_assign_type(field
, iter
->ent
);
1256 if (!trace_seq_printf(s
, ": %lx : ", field
->ip
))
1259 if (!trace_seq_bprintf(s
, field
->fmt
, field
->buf
))
1262 return TRACE_TYPE_HANDLED
;
1265 return TRACE_TYPE_PARTIAL_LINE
;
1268 static struct trace_event_functions trace_bprint_funcs
= {
1269 .trace
= trace_bprint_print
,
1270 .raw
= trace_bprint_raw
,
1273 static struct trace_event trace_bprint_event
= {
1274 .type
= TRACE_BPRINT
,
1275 .funcs
= &trace_bprint_funcs
,
1279 static enum print_line_t
trace_print_print(struct trace_iterator
*iter
,
1280 int flags
, struct trace_event
*event
)
1282 struct print_entry
*field
;
1283 struct trace_seq
*s
= &iter
->seq
;
1285 trace_assign_type(field
, iter
->ent
);
1287 if (!seq_print_ip_sym(s
, field
->ip
, flags
))
1290 if (!trace_seq_printf(s
, ": %s", field
->buf
))
1293 return TRACE_TYPE_HANDLED
;
1296 return TRACE_TYPE_PARTIAL_LINE
;
1299 static enum print_line_t
trace_print_raw(struct trace_iterator
*iter
, int flags
,
1300 struct trace_event
*event
)
1302 struct print_entry
*field
;
1304 trace_assign_type(field
, iter
->ent
);
1306 if (!trace_seq_printf(&iter
->seq
, "# %lx %s", field
->ip
, field
->buf
))
1309 return TRACE_TYPE_HANDLED
;
1312 return TRACE_TYPE_PARTIAL_LINE
;
1315 static struct trace_event_functions trace_print_funcs
= {
1316 .trace
= trace_print_print
,
1317 .raw
= trace_print_raw
,
1320 static struct trace_event trace_print_event
= {
1321 .type
= TRACE_PRINT
,
1322 .funcs
= &trace_print_funcs
,
1326 static struct trace_event
*events
[] __initdata
= {
1331 &trace_user_stack_event
,
1332 &trace_bprint_event
,
1337 __init
static int init_events(void)
1339 struct trace_event
*event
;
1342 for (i
= 0; events
[i
]; i
++) {
1345 ret
= register_ftrace_event(event
);
1347 printk(KERN_WARNING
"event %d failed to register\n",
1355 early_initcall(init_events
);