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 ftrace_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(ftrace_print_flags_seq);
101 ftrace_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(ftrace_print_symbols_seq);
125 #if BITS_PER_LONG == 32
127 ftrace_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(ftrace_print_symbols_seq_u64);
153 ftrace_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(ftrace_print_bitmask_seq);
166 ftrace_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(ftrace_print_hex_seq);
181 ftrace_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(ftrace_print_array_seq);
225 int ftrace_raw_output_prep(struct trace_iterator *iter,
226 struct trace_event *trace_event)
228 struct ftrace_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 ftrace_event_call, event);
236 if (entry->type != event->event.type) {
238 return TRACE_TYPE_UNHANDLED;
242 trace_seq_printf(s, "%s: ", ftrace_event_name(event));
244 return trace_handle_return(s);
246 EXPORT_SYMBOL(ftrace_raw_output_prep);
248 static int ftrace_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 ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
265 ret = ftrace_output_raw(iter, name, fmt, ap);
270 EXPORT_SYMBOL_GPL(ftrace_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_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
359 unsigned long sym_flags)
361 struct mm_struct *mm = NULL;
364 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
365 struct task_struct *task;
367 * we do the lookup on the thread group leader,
368 * since individual threads might have already quit!
371 task = find_task_by_vpid(entry->tgid);
373 mm = get_task_mm(task);
377 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
378 unsigned long ip = entry->caller[i];
380 if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
383 trace_seq_puts(s, " => ");
386 trace_seq_puts(s, "??");
387 trace_seq_putc(s, '\n');
391 seq_print_user_ip(s, mm, ip, sym_flags);
392 trace_seq_putc(s, '\n');
398 return !trace_seq_has_overflowed(s);
402 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
405 trace_seq_putc(s, '0');
409 if (sym_flags & TRACE_ITER_SYM_OFFSET)
410 seq_print_sym_offset(s, "%s", ip);
412 seq_print_sym_short(s, "%s", ip);
414 if (sym_flags & TRACE_ITER_SYM_ADDR)
415 trace_seq_printf(s, " <" IP_FMT ">", ip);
418 return !trace_seq_has_overflowed(s);
422 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
423 * @s: trace seq struct to write to
424 * @entry: The trace entry field from the ring buffer
426 * Prints the generic fields of irqs off, in hard or softirq, preempt
429 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
433 char need_resched_lazy;
438 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
439 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
442 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
443 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
446 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
447 TRACE_FLAG_PREEMPT_RESCHED)) {
448 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
451 case TRACE_FLAG_NEED_RESCHED:
454 case TRACE_FLAG_PREEMPT_RESCHED:
462 (entry->flags & TRACE_FLAG_NEED_RESCHED_LAZY) ? 'L' : '.';
465 (hardirq && softirq) ? 'H' :
470 trace_seq_printf(s, "%c%c%c%c",
471 irqs_off, need_resched, need_resched_lazy,
474 if (entry->preempt_count)
475 trace_seq_printf(s, "%x", entry->preempt_count);
477 trace_seq_putc(s, '.');
479 if (entry->preempt_lazy_count)
480 trace_seq_printf(s, "%x", entry->preempt_lazy_count);
482 trace_seq_putc(s, '.');
484 if (entry->migrate_disable)
485 trace_seq_printf(s, "%x", entry->migrate_disable);
487 trace_seq_putc(s, '.');
489 return !trace_seq_has_overflowed(s);
493 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
495 char comm[TASK_COMM_LEN];
497 trace_find_cmdline(entry->pid, comm);
499 trace_seq_printf(s, "%8.8s-%-5d %3d",
500 comm, entry->pid, cpu);
502 return trace_print_lat_fmt(s, entry);
506 #define MARK(v, s) {.val = v, .sym = s}
507 /* trace overhead mark */
508 static const struct trace_mark {
509 unsigned long long val; /* unit: nsec */
512 MARK(1000000000ULL , '$'), /* 1 sec */
513 MARK(1000000ULL , '#'), /* 1000 usecs */
514 MARK(100000ULL , '!'), /* 100 usecs */
515 MARK(10000ULL , '+'), /* 10 usecs */
519 char trace_find_mark(unsigned long long d)
522 int size = ARRAY_SIZE(mark);
524 for (i = 0; i < size; i++) {
525 if (d >= mark[i].val)
529 return (i == size) ? ' ' : mark[i].sym;
533 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
535 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
536 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
537 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
538 unsigned long long rel_ts = next_ts - iter->ts;
539 struct trace_seq *s = &iter->seq;
542 abs_ts = ns2usecs(abs_ts);
543 rel_ts = ns2usecs(rel_ts);
546 if (verbose && in_ns) {
547 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
548 unsigned long abs_msec = (unsigned long)abs_ts;
549 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
550 unsigned long rel_msec = (unsigned long)rel_ts;
553 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
558 } else if (verbose && !in_ns) {
560 s, "[%016llx] %lld (+%lld): ",
561 iter->ts, abs_ts, rel_ts);
563 } else if (!verbose && in_ns) {
567 trace_find_mark(rel_ts * NSEC_PER_USEC));
569 } else { /* !verbose && !in_ns */
570 trace_seq_printf(s, " %4lld: ", abs_ts);
573 return !trace_seq_has_overflowed(s);
576 int trace_print_context(struct trace_iterator *iter)
578 struct trace_seq *s = &iter->seq;
579 struct trace_entry *entry = iter->ent;
580 unsigned long long t;
581 unsigned long secs, usec_rem;
582 char comm[TASK_COMM_LEN];
584 trace_find_cmdline(entry->pid, comm);
586 trace_seq_printf(s, "%16s-%-5d [%03d] ",
587 comm, entry->pid, iter->cpu);
589 if (trace_flags & TRACE_ITER_IRQ_INFO)
590 trace_print_lat_fmt(s, entry);
592 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
593 t = ns2usecs(iter->ts);
594 usec_rem = do_div(t, USEC_PER_SEC);
595 secs = (unsigned long)t;
596 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
598 trace_seq_printf(s, " %12llu: ", iter->ts);
600 return !trace_seq_has_overflowed(s);
603 int trace_print_lat_context(struct trace_iterator *iter)
606 /* trace_find_next_entry will reset ent_size */
607 int ent_size = iter->ent_size;
608 struct trace_seq *s = &iter->seq;
609 struct trace_entry *entry = iter->ent,
610 *next_entry = trace_find_next_entry(iter, NULL,
612 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
614 /* Restore the original ent_size */
615 iter->ent_size = ent_size;
621 char comm[TASK_COMM_LEN];
623 trace_find_cmdline(entry->pid, comm);
626 s, "%16s %5d %3d %d %08x %08lx ",
627 comm, entry->pid, iter->cpu, entry->flags,
628 entry->preempt_count, iter->idx);
630 lat_print_generic(s, entry, iter->cpu);
633 lat_print_timestamp(iter, next_ts);
635 return !trace_seq_has_overflowed(s);
638 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
640 static int task_state_char(unsigned long state)
642 int bit = state ? __ffs(state) + 1 : 0;
644 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
648 * ftrace_find_event - find a registered event
649 * @type: the type of event to look for
651 * Returns an event of type @type otherwise NULL
652 * Called with trace_event_read_lock() held.
654 struct trace_event *ftrace_find_event(int type)
656 struct trace_event *event;
659 key = type & (EVENT_HASHSIZE - 1);
661 hlist_for_each_entry(event, &event_hash[key], node) {
662 if (event->type == type)
669 static LIST_HEAD(ftrace_event_list);
671 static int trace_search_list(struct list_head **list)
673 struct trace_event *e;
674 int last = __TRACE_LAST_TYPE;
676 if (list_empty(&ftrace_event_list)) {
677 *list = &ftrace_event_list;
682 * We used up all possible max events,
683 * lets see if somebody freed one.
685 list_for_each_entry(e, &ftrace_event_list, list) {
686 if (e->type != last + 1)
691 /* Did we used up all 65 thousand events??? */
692 if ((last + 1) > FTRACE_MAX_EVENT)
699 void trace_event_read_lock(void)
701 down_read(&trace_event_sem);
704 void trace_event_read_unlock(void)
706 up_read(&trace_event_sem);
710 * register_ftrace_event - register output for an event type
711 * @event: the event type to register
713 * Event types are stored in a hash and this hash is used to
714 * find a way to print an event. If the @event->type is set
715 * then it will use that type, otherwise it will assign a
718 * If you assign your own type, please make sure it is added
719 * to the trace_type enum in trace.h, to avoid collisions
720 * with the dynamic types.
722 * Returns the event type number or zero on error.
724 int register_ftrace_event(struct trace_event *event)
729 down_write(&trace_event_sem);
734 if (WARN_ON(!event->funcs))
737 INIT_LIST_HEAD(&event->list);
740 struct list_head *list = NULL;
742 if (next_event_type > FTRACE_MAX_EVENT) {
744 event->type = trace_search_list(&list);
750 event->type = next_event_type++;
751 list = &ftrace_event_list;
754 if (WARN_ON(ftrace_find_event(event->type)))
757 list_add_tail(&event->list, list);
759 } else if (event->type > __TRACE_LAST_TYPE) {
760 printk(KERN_WARNING "Need to add type to trace.h\n");
764 /* Is this event already used */
765 if (ftrace_find_event(event->type))
769 if (event->funcs->trace == NULL)
770 event->funcs->trace = trace_nop_print;
771 if (event->funcs->raw == NULL)
772 event->funcs->raw = trace_nop_print;
773 if (event->funcs->hex == NULL)
774 event->funcs->hex = trace_nop_print;
775 if (event->funcs->binary == NULL)
776 event->funcs->binary = trace_nop_print;
778 key = event->type & (EVENT_HASHSIZE - 1);
780 hlist_add_head(&event->node, &event_hash[key]);
784 up_write(&trace_event_sem);
788 EXPORT_SYMBOL_GPL(register_ftrace_event);
791 * Used by module code with the trace_event_sem held for write.
793 int __unregister_ftrace_event(struct trace_event *event)
795 hlist_del(&event->node);
796 list_del(&event->list);
801 * unregister_ftrace_event - remove a no longer used event
802 * @event: the event to remove
804 int unregister_ftrace_event(struct trace_event *event)
806 down_write(&trace_event_sem);
807 __unregister_ftrace_event(event);
808 up_write(&trace_event_sem);
812 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
818 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
819 struct trace_event *event)
821 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
823 return trace_handle_return(&iter->seq);
827 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
828 struct trace_event *event)
830 struct ftrace_entry *field;
831 struct trace_seq *s = &iter->seq;
833 trace_assign_type(field, iter->ent);
835 seq_print_ip_sym(s, field->ip, flags);
837 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
838 trace_seq_puts(s, " <-");
839 seq_print_ip_sym(s, field->parent_ip, flags);
842 trace_seq_putc(s, '\n');
844 return trace_handle_return(s);
847 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
848 struct trace_event *event)
850 struct ftrace_entry *field;
852 trace_assign_type(field, iter->ent);
854 trace_seq_printf(&iter->seq, "%lx %lx\n",
858 return trace_handle_return(&iter->seq);
861 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
862 struct trace_event *event)
864 struct ftrace_entry *field;
865 struct trace_seq *s = &iter->seq;
867 trace_assign_type(field, iter->ent);
869 SEQ_PUT_HEX_FIELD(s, field->ip);
870 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
872 return trace_handle_return(s);
875 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
876 struct trace_event *event)
878 struct ftrace_entry *field;
879 struct trace_seq *s = &iter->seq;
881 trace_assign_type(field, iter->ent);
883 SEQ_PUT_FIELD(s, field->ip);
884 SEQ_PUT_FIELD(s, field->parent_ip);
886 return trace_handle_return(s);
889 static struct trace_event_functions trace_fn_funcs = {
890 .trace = trace_fn_trace,
893 .binary = trace_fn_bin,
896 static struct trace_event trace_fn_event = {
898 .funcs = &trace_fn_funcs,
901 /* TRACE_CTX an TRACE_WAKE */
902 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
905 struct ctx_switch_entry *field;
906 char comm[TASK_COMM_LEN];
910 trace_assign_type(field, iter->ent);
912 T = task_state_char(field->next_state);
913 S = task_state_char(field->prev_state);
914 trace_find_cmdline(field->next_pid, comm);
915 trace_seq_printf(&iter->seq,
916 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
925 return trace_handle_return(&iter->seq);
928 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
929 struct trace_event *event)
931 return trace_ctxwake_print(iter, "==>");
934 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
935 int flags, struct trace_event *event)
937 return trace_ctxwake_print(iter, " +");
940 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
942 struct ctx_switch_entry *field;
945 trace_assign_type(field, iter->ent);
948 S = task_state_char(field->prev_state);
949 T = task_state_char(field->next_state);
950 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
959 return trace_handle_return(&iter->seq);
962 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
963 struct trace_event *event)
965 return trace_ctxwake_raw(iter, 0);
968 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
969 struct trace_event *event)
971 return trace_ctxwake_raw(iter, '+');
975 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
977 struct ctx_switch_entry *field;
978 struct trace_seq *s = &iter->seq;
981 trace_assign_type(field, iter->ent);
984 S = task_state_char(field->prev_state);
985 T = task_state_char(field->next_state);
987 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
988 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
989 SEQ_PUT_HEX_FIELD(s, S);
990 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
991 SEQ_PUT_HEX_FIELD(s, field->next_pid);
992 SEQ_PUT_HEX_FIELD(s, field->next_prio);
993 SEQ_PUT_HEX_FIELD(s, T);
995 return trace_handle_return(s);
998 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
999 struct trace_event *event)
1001 return trace_ctxwake_hex(iter, 0);
1004 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1005 struct trace_event *event)
1007 return trace_ctxwake_hex(iter, '+');
1010 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1011 int flags, struct trace_event *event)
1013 struct ctx_switch_entry *field;
1014 struct trace_seq *s = &iter->seq;
1016 trace_assign_type(field, iter->ent);
1018 SEQ_PUT_FIELD(s, field->prev_pid);
1019 SEQ_PUT_FIELD(s, field->prev_prio);
1020 SEQ_PUT_FIELD(s, field->prev_state);
1021 SEQ_PUT_FIELD(s, field->next_cpu);
1022 SEQ_PUT_FIELD(s, field->next_pid);
1023 SEQ_PUT_FIELD(s, field->next_prio);
1024 SEQ_PUT_FIELD(s, field->next_state);
1026 return trace_handle_return(s);
1029 static struct trace_event_functions trace_ctx_funcs = {
1030 .trace = trace_ctx_print,
1031 .raw = trace_ctx_raw,
1032 .hex = trace_ctx_hex,
1033 .binary = trace_ctxwake_bin,
1036 static struct trace_event trace_ctx_event = {
1038 .funcs = &trace_ctx_funcs,
1041 static struct trace_event_functions trace_wake_funcs = {
1042 .trace = trace_wake_print,
1043 .raw = trace_wake_raw,
1044 .hex = trace_wake_hex,
1045 .binary = trace_ctxwake_bin,
1048 static struct trace_event trace_wake_event = {
1050 .funcs = &trace_wake_funcs,
1055 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1056 int flags, struct trace_event *event)
1058 struct stack_entry *field;
1059 struct trace_seq *s = &iter->seq;
1063 trace_assign_type(field, iter->ent);
1064 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1066 trace_seq_puts(s, "<stack trace>\n");
1068 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1070 if (trace_seq_has_overflowed(s))
1073 trace_seq_puts(s, " => ");
1074 seq_print_ip_sym(s, *p, flags);
1075 trace_seq_putc(s, '\n');
1078 return trace_handle_return(s);
1081 static struct trace_event_functions trace_stack_funcs = {
1082 .trace = trace_stack_print,
1085 static struct trace_event trace_stack_event = {
1086 .type = TRACE_STACK,
1087 .funcs = &trace_stack_funcs,
1090 /* TRACE_USER_STACK */
1091 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1092 int flags, struct trace_event *event)
1094 struct userstack_entry *field;
1095 struct trace_seq *s = &iter->seq;
1097 trace_assign_type(field, iter->ent);
1099 trace_seq_puts(s, "<user stack trace>\n");
1100 seq_print_userip_objs(field, s, flags);
1102 return trace_handle_return(s);
1105 static struct trace_event_functions trace_user_stack_funcs = {
1106 .trace = trace_user_stack_print,
1109 static struct trace_event trace_user_stack_event = {
1110 .type = TRACE_USER_STACK,
1111 .funcs = &trace_user_stack_funcs,
1115 static enum print_line_t
1116 trace_bputs_print(struct trace_iterator *iter, int flags,
1117 struct trace_event *event)
1119 struct trace_entry *entry = iter->ent;
1120 struct trace_seq *s = &iter->seq;
1121 struct bputs_entry *field;
1123 trace_assign_type(field, entry);
1125 seq_print_ip_sym(s, field->ip, flags);
1126 trace_seq_puts(s, ": ");
1127 trace_seq_puts(s, field->str);
1129 return trace_handle_return(s);
1133 static enum print_line_t
1134 trace_bputs_raw(struct trace_iterator *iter, int flags,
1135 struct trace_event *event)
1137 struct bputs_entry *field;
1138 struct trace_seq *s = &iter->seq;
1140 trace_assign_type(field, iter->ent);
1142 trace_seq_printf(s, ": %lx : ", field->ip);
1143 trace_seq_puts(s, field->str);
1145 return trace_handle_return(s);
1148 static struct trace_event_functions trace_bputs_funcs = {
1149 .trace = trace_bputs_print,
1150 .raw = trace_bputs_raw,
1153 static struct trace_event trace_bputs_event = {
1154 .type = TRACE_BPUTS,
1155 .funcs = &trace_bputs_funcs,
1159 static enum print_line_t
1160 trace_bprint_print(struct trace_iterator *iter, int flags,
1161 struct trace_event *event)
1163 struct trace_entry *entry = iter->ent;
1164 struct trace_seq *s = &iter->seq;
1165 struct bprint_entry *field;
1167 trace_assign_type(field, entry);
1169 seq_print_ip_sym(s, field->ip, flags);
1170 trace_seq_puts(s, ": ");
1171 trace_seq_bprintf(s, field->fmt, field->buf);
1173 return trace_handle_return(s);
1177 static enum print_line_t
1178 trace_bprint_raw(struct trace_iterator *iter, int flags,
1179 struct trace_event *event)
1181 struct bprint_entry *field;
1182 struct trace_seq *s = &iter->seq;
1184 trace_assign_type(field, iter->ent);
1186 trace_seq_printf(s, ": %lx : ", field->ip);
1187 trace_seq_bprintf(s, field->fmt, field->buf);
1189 return trace_handle_return(s);
1192 static struct trace_event_functions trace_bprint_funcs = {
1193 .trace = trace_bprint_print,
1194 .raw = trace_bprint_raw,
1197 static struct trace_event trace_bprint_event = {
1198 .type = TRACE_BPRINT,
1199 .funcs = &trace_bprint_funcs,
1203 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1204 int flags, struct trace_event *event)
1206 struct print_entry *field;
1207 struct trace_seq *s = &iter->seq;
1209 trace_assign_type(field, iter->ent);
1211 seq_print_ip_sym(s, field->ip, flags);
1212 trace_seq_printf(s, ": %s", field->buf);
1214 return trace_handle_return(s);
1217 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1218 struct trace_event *event)
1220 struct print_entry *field;
1222 trace_assign_type(field, iter->ent);
1224 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1226 return trace_handle_return(&iter->seq);
1229 static struct trace_event_functions trace_print_funcs = {
1230 .trace = trace_print_print,
1231 .raw = trace_print_raw,
1234 static struct trace_event trace_print_event = {
1235 .type = TRACE_PRINT,
1236 .funcs = &trace_print_funcs,
1240 static struct trace_event *events[] __initdata = {
1245 &trace_user_stack_event,
1247 &trace_bprint_event,
1252 __init static int init_events(void)
1254 struct trace_event *event;
1257 for (i = 0; events[i]; i++) {
1260 ret = register_ftrace_event(event);
1262 printk(KERN_WARNING "event %d failed to register\n",
1270 early_initcall(init_events);