4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10 #include <linux/ftrace.h>
12 #include "trace_output.h"
14 /* must be a power of 2 */
15 #define EVENT_HASHSIZE 128
17 DECLARE_RWSEM(trace_event_sem);
19 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
21 static int next_event_type = __TRACE_LAST_TYPE + 1;
23 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
25 struct trace_seq *s = &iter->seq;
26 struct trace_entry *entry = iter->ent;
27 struct bputs_entry *field;
29 trace_assign_type(field, entry);
31 trace_seq_puts(s, field->str);
33 return trace_handle_return(s);
36 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
38 struct trace_seq *s = &iter->seq;
39 struct trace_entry *entry = iter->ent;
40 struct bprint_entry *field;
42 trace_assign_type(field, entry);
44 trace_seq_bprintf(s, field->fmt, field->buf);
46 return trace_handle_return(s);
49 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
51 struct trace_seq *s = &iter->seq;
52 struct trace_entry *entry = iter->ent;
53 struct print_entry *field;
55 trace_assign_type(field, entry);
57 trace_seq_puts(s, field->buf);
59 return trace_handle_return(s);
63 trace_print_flags_seq(struct trace_seq *p, const char *delim,
65 const struct trace_print_flags *flag_array)
69 const char *ret = trace_seq_buffer_ptr(p);
72 for (i = 0; flag_array[i].name && flags; i++) {
74 mask = flag_array[i].mask;
75 if ((flags & mask) != mask)
78 str = flag_array[i].name;
81 trace_seq_puts(p, delim);
84 trace_seq_puts(p, str);
87 /* check for left over flags */
90 trace_seq_puts(p, delim);
91 trace_seq_printf(p, "0x%lx", flags);
98 EXPORT_SYMBOL(trace_print_flags_seq);
101 trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
102 const struct trace_print_flags *symbol_array)
105 const char *ret = trace_seq_buffer_ptr(p);
107 for (i = 0; symbol_array[i].name; i++) {
109 if (val != symbol_array[i].mask)
112 trace_seq_puts(p, symbol_array[i].name);
116 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
117 trace_seq_printf(p, "0x%lx", val);
119 trace_seq_putc(p, 0);
123 EXPORT_SYMBOL(trace_print_symbols_seq);
125 #if BITS_PER_LONG == 32
127 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
128 const struct trace_print_flags_u64 *symbol_array)
131 const char *ret = trace_seq_buffer_ptr(p);
133 for (i = 0; symbol_array[i].name; i++) {
135 if (val != symbol_array[i].mask)
138 trace_seq_puts(p, symbol_array[i].name);
142 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
143 trace_seq_printf(p, "0x%llx", val);
145 trace_seq_putc(p, 0);
149 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
153 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
154 unsigned int bitmask_size)
156 const char *ret = trace_seq_buffer_ptr(p);
158 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
159 trace_seq_putc(p, 0);
163 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
166 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
169 const char *ret = trace_seq_buffer_ptr(p);
171 for (i = 0; i < buf_len; i++)
172 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
174 trace_seq_putc(p, 0);
178 EXPORT_SYMBOL(trace_print_hex_seq);
181 trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
184 const char *ret = trace_seq_buffer_ptr(p);
185 const char *prefix = "";
186 void *ptr = (void *)buf;
187 size_t buf_len = count * el_size;
189 trace_seq_putc(p, '{');
191 while (ptr < buf + buf_len) {
194 trace_seq_printf(p, "%s0x%x", prefix,
198 trace_seq_printf(p, "%s0x%x", prefix,
202 trace_seq_printf(p, "%s0x%x", prefix,
206 trace_seq_printf(p, "%s0x%llx", prefix,
210 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
218 trace_seq_putc(p, '}');
219 trace_seq_putc(p, 0);
223 EXPORT_SYMBOL(trace_print_array_seq);
225 int trace_raw_output_prep(struct trace_iterator *iter,
226 struct trace_event *trace_event)
228 struct trace_event_call *event;
229 struct trace_seq *s = &iter->seq;
230 struct trace_seq *p = &iter->tmp_seq;
231 struct trace_entry *entry;
233 event = container_of(trace_event, struct trace_event_call, event);
236 if (entry->type != event->event.type) {
238 return TRACE_TYPE_UNHANDLED;
242 trace_seq_printf(s, "%s: ", trace_event_name(event));
244 return trace_handle_return(s);
246 EXPORT_SYMBOL(trace_raw_output_prep);
248 static int trace_output_raw(struct trace_iterator *iter, char *name,
249 char *fmt, va_list ap)
251 struct trace_seq *s = &iter->seq;
253 trace_seq_printf(s, "%s: ", name);
254 trace_seq_vprintf(s, fmt, ap);
256 return trace_handle_return(s);
259 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
265 ret = trace_output_raw(iter, name, fmt, ap);
270 EXPORT_SYMBOL_GPL(trace_output_call);
272 #ifdef CONFIG_KRETPROBES
273 static inline const char *kretprobed(const char *name)
275 static const char tramp_name[] = "kretprobe_trampoline";
276 int size = sizeof(tramp_name);
278 if (strncmp(tramp_name, name, size) == 0)
279 return "[unknown/kretprobe'd]";
283 static inline const char *kretprobed(const char *name)
287 #endif /* CONFIG_KRETPROBES */
290 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
292 #ifdef CONFIG_KALLSYMS
293 char str[KSYM_SYMBOL_LEN];
296 kallsyms_lookup(address, NULL, NULL, NULL, str);
298 name = kretprobed(str);
300 trace_seq_printf(s, fmt, name);
305 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
306 unsigned long address)
308 #ifdef CONFIG_KALLSYMS
309 char str[KSYM_SYMBOL_LEN];
312 sprint_symbol(str, address);
313 name = kretprobed(str);
315 trace_seq_printf(s, fmt, name);
320 # define IP_FMT "%08lx"
322 # define IP_FMT "%016lx"
325 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
326 unsigned long ip, unsigned long sym_flags)
328 struct file *file = NULL;
329 unsigned long vmstart = 0;
336 const struct vm_area_struct *vma;
338 down_read(&mm->mmap_sem);
339 vma = find_vma(mm, ip);
342 vmstart = vma->vm_start;
345 ret = trace_seq_path(s, &file->f_path);
347 trace_seq_printf(s, "[+0x%lx]",
350 up_read(&mm->mmap_sem);
352 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
353 trace_seq_printf(s, " <" IP_FMT ">", ip);
354 return !trace_seq_has_overflowed(s);
358 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
361 trace_seq_putc(s, '0');
365 if (sym_flags & TRACE_ITER_SYM_OFFSET)
366 seq_print_sym_offset(s, "%s", ip);
368 seq_print_sym_short(s, "%s", ip);
370 if (sym_flags & TRACE_ITER_SYM_ADDR)
371 trace_seq_printf(s, " <" IP_FMT ">", ip);
374 return !trace_seq_has_overflowed(s);
378 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
379 * @s: trace seq struct to write to
380 * @entry: The trace entry field from the ring buffer
382 * Prints the generic fields of irqs off, in hard or softirq, preempt
385 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
389 char need_resched_lazy;
394 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
395 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
398 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
399 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
402 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
403 TRACE_FLAG_PREEMPT_RESCHED)) {
404 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
407 case TRACE_FLAG_NEED_RESCHED:
410 case TRACE_FLAG_PREEMPT_RESCHED:
418 (entry->flags & TRACE_FLAG_NEED_RESCHED_LAZY) ? 'L' : '.';
421 (hardirq && softirq) ? 'H' :
426 trace_seq_printf(s, "%c%c%c%c",
427 irqs_off, need_resched, need_resched_lazy,
430 if (entry->preempt_count)
431 trace_seq_printf(s, "%x", entry->preempt_count);
433 trace_seq_putc(s, '.');
435 if (entry->preempt_lazy_count)
436 trace_seq_printf(s, "%x", entry->preempt_lazy_count);
438 trace_seq_putc(s, '.');
440 if (entry->migrate_disable)
441 trace_seq_printf(s, "%x", entry->migrate_disable);
443 trace_seq_putc(s, '.');
445 return !trace_seq_has_overflowed(s);
449 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
451 char comm[TASK_COMM_LEN];
453 trace_find_cmdline(entry->pid, comm);
455 trace_seq_printf(s, "%8.8s-%-5d %3d",
456 comm, entry->pid, cpu);
458 return trace_print_lat_fmt(s, entry);
462 #define MARK(v, s) {.val = v, .sym = s}
463 /* trace overhead mark */
464 static const struct trace_mark {
465 unsigned long long val; /* unit: nsec */
468 MARK(1000000000ULL , '$'), /* 1 sec */
469 MARK(100000000ULL , '@'), /* 100 msec */
470 MARK(10000000ULL , '*'), /* 10 msec */
471 MARK(1000000ULL , '#'), /* 1000 usecs */
472 MARK(100000ULL , '!'), /* 100 usecs */
473 MARK(10000ULL , '+'), /* 10 usecs */
477 char trace_find_mark(unsigned long long d)
480 int size = ARRAY_SIZE(mark);
482 for (i = 0; i < size; i++) {
487 return (i == size) ? ' ' : mark[i].sym;
491 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
493 struct trace_array *tr = iter->tr;
494 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
495 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
496 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
497 unsigned long long rel_ts = next_ts - iter->ts;
498 struct trace_seq *s = &iter->seq;
501 abs_ts = ns2usecs(abs_ts);
502 rel_ts = ns2usecs(rel_ts);
505 if (verbose && in_ns) {
506 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
507 unsigned long abs_msec = (unsigned long)abs_ts;
508 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
509 unsigned long rel_msec = (unsigned long)rel_ts;
512 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
517 } else if (verbose && !in_ns) {
519 s, "[%016llx] %lld (+%lld): ",
520 iter->ts, abs_ts, rel_ts);
522 } else if (!verbose && in_ns) {
526 trace_find_mark(rel_ts * NSEC_PER_USEC));
528 } else { /* !verbose && !in_ns */
529 trace_seq_printf(s, " %4lld: ", abs_ts);
532 return !trace_seq_has_overflowed(s);
535 int trace_print_context(struct trace_iterator *iter)
537 struct trace_array *tr = iter->tr;
538 struct trace_seq *s = &iter->seq;
539 struct trace_entry *entry = iter->ent;
540 unsigned long long t;
541 unsigned long secs, usec_rem;
542 char comm[TASK_COMM_LEN];
544 trace_find_cmdline(entry->pid, comm);
546 trace_seq_printf(s, "%16s-%-5d [%03d] ",
547 comm, entry->pid, iter->cpu);
549 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
550 trace_print_lat_fmt(s, entry);
552 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
553 t = ns2usecs(iter->ts);
554 usec_rem = do_div(t, USEC_PER_SEC);
555 secs = (unsigned long)t;
556 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
558 trace_seq_printf(s, " %12llu: ", iter->ts);
560 return !trace_seq_has_overflowed(s);
563 int trace_print_lat_context(struct trace_iterator *iter)
565 struct trace_array *tr = iter->tr;
566 /* trace_find_next_entry will reset ent_size */
567 int ent_size = iter->ent_size;
568 struct trace_seq *s = &iter->seq;
570 struct trace_entry *entry = iter->ent,
571 *next_entry = trace_find_next_entry(iter, NULL,
573 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
575 /* Restore the original ent_size */
576 iter->ent_size = ent_size;
582 char comm[TASK_COMM_LEN];
584 trace_find_cmdline(entry->pid, comm);
587 s, "%16s %5d %3d %d %08x %08lx ",
588 comm, entry->pid, iter->cpu, entry->flags,
589 entry->preempt_count, iter->idx);
591 lat_print_generic(s, entry, iter->cpu);
594 lat_print_timestamp(iter, next_ts);
596 return !trace_seq_has_overflowed(s);
599 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
601 static int task_state_char(unsigned long state)
603 int bit = state ? __ffs(state) + 1 : 0;
605 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
609 * ftrace_find_event - find a registered event
610 * @type: the type of event to look for
612 * Returns an event of type @type otherwise NULL
613 * Called with trace_event_read_lock() held.
615 struct trace_event *ftrace_find_event(int type)
617 struct trace_event *event;
620 key = type & (EVENT_HASHSIZE - 1);
622 hlist_for_each_entry(event, &event_hash[key], node) {
623 if (event->type == type)
630 static LIST_HEAD(ftrace_event_list);
632 static int trace_search_list(struct list_head **list)
634 struct trace_event *e;
635 int last = __TRACE_LAST_TYPE;
637 if (list_empty(&ftrace_event_list)) {
638 *list = &ftrace_event_list;
643 * We used up all possible max events,
644 * lets see if somebody freed one.
646 list_for_each_entry(e, &ftrace_event_list, list) {
647 if (e->type != last + 1)
652 /* Did we used up all 65 thousand events??? */
653 if ((last + 1) > TRACE_EVENT_TYPE_MAX)
660 void trace_event_read_lock(void)
662 down_read(&trace_event_sem);
665 void trace_event_read_unlock(void)
667 up_read(&trace_event_sem);
671 * register_trace_event - register output for an event type
672 * @event: the event type to register
674 * Event types are stored in a hash and this hash is used to
675 * find a way to print an event. If the @event->type is set
676 * then it will use that type, otherwise it will assign a
679 * If you assign your own type, please make sure it is added
680 * to the trace_type enum in trace.h, to avoid collisions
681 * with the dynamic types.
683 * Returns the event type number or zero on error.
685 int register_trace_event(struct trace_event *event)
690 down_write(&trace_event_sem);
695 if (WARN_ON(!event->funcs))
698 INIT_LIST_HEAD(&event->list);
701 struct list_head *list = NULL;
703 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
705 event->type = trace_search_list(&list);
711 event->type = next_event_type++;
712 list = &ftrace_event_list;
715 if (WARN_ON(ftrace_find_event(event->type)))
718 list_add_tail(&event->list, list);
720 } else if (event->type > __TRACE_LAST_TYPE) {
721 printk(KERN_WARNING "Need to add type to trace.h\n");
725 /* Is this event already used */
726 if (ftrace_find_event(event->type))
730 if (event->funcs->trace == NULL)
731 event->funcs->trace = trace_nop_print;
732 if (event->funcs->raw == NULL)
733 event->funcs->raw = trace_nop_print;
734 if (event->funcs->hex == NULL)
735 event->funcs->hex = trace_nop_print;
736 if (event->funcs->binary == NULL)
737 event->funcs->binary = trace_nop_print;
739 key = event->type & (EVENT_HASHSIZE - 1);
741 hlist_add_head(&event->node, &event_hash[key]);
745 up_write(&trace_event_sem);
749 EXPORT_SYMBOL_GPL(register_trace_event);
752 * Used by module code with the trace_event_sem held for write.
754 int __unregister_trace_event(struct trace_event *event)
756 hlist_del(&event->node);
757 list_del(&event->list);
762 * unregister_trace_event - remove a no longer used event
763 * @event: the event to remove
765 int unregister_trace_event(struct trace_event *event)
767 down_write(&trace_event_sem);
768 __unregister_trace_event(event);
769 up_write(&trace_event_sem);
773 EXPORT_SYMBOL_GPL(unregister_trace_event);
779 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
780 struct trace_event *event)
782 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
784 return trace_handle_return(&iter->seq);
788 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
789 struct trace_event *event)
791 struct ftrace_entry *field;
792 struct trace_seq *s = &iter->seq;
794 trace_assign_type(field, iter->ent);
796 seq_print_ip_sym(s, field->ip, flags);
798 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
799 trace_seq_puts(s, " <-");
800 seq_print_ip_sym(s, field->parent_ip, flags);
803 trace_seq_putc(s, '\n');
805 return trace_handle_return(s);
808 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
809 struct trace_event *event)
811 struct ftrace_entry *field;
813 trace_assign_type(field, iter->ent);
815 trace_seq_printf(&iter->seq, "%lx %lx\n",
819 return trace_handle_return(&iter->seq);
822 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
823 struct trace_event *event)
825 struct ftrace_entry *field;
826 struct trace_seq *s = &iter->seq;
828 trace_assign_type(field, iter->ent);
830 SEQ_PUT_HEX_FIELD(s, field->ip);
831 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
833 return trace_handle_return(s);
836 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
837 struct trace_event *event)
839 struct ftrace_entry *field;
840 struct trace_seq *s = &iter->seq;
842 trace_assign_type(field, iter->ent);
844 SEQ_PUT_FIELD(s, field->ip);
845 SEQ_PUT_FIELD(s, field->parent_ip);
847 return trace_handle_return(s);
850 static struct trace_event_functions trace_fn_funcs = {
851 .trace = trace_fn_trace,
854 .binary = trace_fn_bin,
857 static struct trace_event trace_fn_event = {
859 .funcs = &trace_fn_funcs,
862 /* TRACE_CTX an TRACE_WAKE */
863 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
866 struct ctx_switch_entry *field;
867 char comm[TASK_COMM_LEN];
871 trace_assign_type(field, iter->ent);
873 T = task_state_char(field->next_state);
874 S = task_state_char(field->prev_state);
875 trace_find_cmdline(field->next_pid, comm);
876 trace_seq_printf(&iter->seq,
877 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
886 return trace_handle_return(&iter->seq);
889 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
890 struct trace_event *event)
892 return trace_ctxwake_print(iter, "==>");
895 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
896 int flags, struct trace_event *event)
898 return trace_ctxwake_print(iter, " +");
901 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
903 struct ctx_switch_entry *field;
906 trace_assign_type(field, iter->ent);
909 S = task_state_char(field->prev_state);
910 T = task_state_char(field->next_state);
911 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
920 return trace_handle_return(&iter->seq);
923 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
924 struct trace_event *event)
926 return trace_ctxwake_raw(iter, 0);
929 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
930 struct trace_event *event)
932 return trace_ctxwake_raw(iter, '+');
936 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
938 struct ctx_switch_entry *field;
939 struct trace_seq *s = &iter->seq;
942 trace_assign_type(field, iter->ent);
945 S = task_state_char(field->prev_state);
946 T = task_state_char(field->next_state);
948 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
949 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
950 SEQ_PUT_HEX_FIELD(s, S);
951 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
952 SEQ_PUT_HEX_FIELD(s, field->next_pid);
953 SEQ_PUT_HEX_FIELD(s, field->next_prio);
954 SEQ_PUT_HEX_FIELD(s, T);
956 return trace_handle_return(s);
959 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
960 struct trace_event *event)
962 return trace_ctxwake_hex(iter, 0);
965 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
966 struct trace_event *event)
968 return trace_ctxwake_hex(iter, '+');
971 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
972 int flags, struct trace_event *event)
974 struct ctx_switch_entry *field;
975 struct trace_seq *s = &iter->seq;
977 trace_assign_type(field, iter->ent);
979 SEQ_PUT_FIELD(s, field->prev_pid);
980 SEQ_PUT_FIELD(s, field->prev_prio);
981 SEQ_PUT_FIELD(s, field->prev_state);
982 SEQ_PUT_FIELD(s, field->next_cpu);
983 SEQ_PUT_FIELD(s, field->next_pid);
984 SEQ_PUT_FIELD(s, field->next_prio);
985 SEQ_PUT_FIELD(s, field->next_state);
987 return trace_handle_return(s);
990 static struct trace_event_functions trace_ctx_funcs = {
991 .trace = trace_ctx_print,
992 .raw = trace_ctx_raw,
993 .hex = trace_ctx_hex,
994 .binary = trace_ctxwake_bin,
997 static struct trace_event trace_ctx_event = {
999 .funcs = &trace_ctx_funcs,
1002 static struct trace_event_functions trace_wake_funcs = {
1003 .trace = trace_wake_print,
1004 .raw = trace_wake_raw,
1005 .hex = trace_wake_hex,
1006 .binary = trace_ctxwake_bin,
1009 static struct trace_event trace_wake_event = {
1011 .funcs = &trace_wake_funcs,
1016 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1017 int flags, struct trace_event *event)
1019 struct stack_entry *field;
1020 struct trace_seq *s = &iter->seq;
1024 trace_assign_type(field, iter->ent);
1025 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1027 trace_seq_puts(s, "<stack trace>\n");
1029 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1031 if (trace_seq_has_overflowed(s))
1034 trace_seq_puts(s, " => ");
1035 seq_print_ip_sym(s, *p, flags);
1036 trace_seq_putc(s, '\n');
1039 return trace_handle_return(s);
1042 static struct trace_event_functions trace_stack_funcs = {
1043 .trace = trace_stack_print,
1046 static struct trace_event trace_stack_event = {
1047 .type = TRACE_STACK,
1048 .funcs = &trace_stack_funcs,
1051 /* TRACE_USER_STACK */
1052 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1053 int flags, struct trace_event *event)
1055 struct trace_array *tr = iter->tr;
1056 struct userstack_entry *field;
1057 struct trace_seq *s = &iter->seq;
1058 struct mm_struct *mm = NULL;
1061 trace_assign_type(field, iter->ent);
1063 trace_seq_puts(s, "<user stack trace>\n");
1065 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1066 struct task_struct *task;
1068 * we do the lookup on the thread group leader,
1069 * since individual threads might have already quit!
1072 task = find_task_by_vpid(field->tgid);
1074 mm = get_task_mm(task);
1078 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1079 unsigned long ip = field->caller[i];
1081 if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
1084 trace_seq_puts(s, " => ");
1087 trace_seq_puts(s, "??");
1088 trace_seq_putc(s, '\n');
1092 seq_print_user_ip(s, mm, ip, flags);
1093 trace_seq_putc(s, '\n');
1099 return trace_handle_return(s);
1102 static struct trace_event_functions trace_user_stack_funcs = {
1103 .trace = trace_user_stack_print,
1106 static struct trace_event trace_user_stack_event = {
1107 .type = TRACE_USER_STACK,
1108 .funcs = &trace_user_stack_funcs,
1112 static enum print_line_t
1113 trace_bputs_print(struct trace_iterator *iter, int flags,
1114 struct trace_event *event)
1116 struct trace_entry *entry = iter->ent;
1117 struct trace_seq *s = &iter->seq;
1118 struct bputs_entry *field;
1120 trace_assign_type(field, entry);
1122 seq_print_ip_sym(s, field->ip, flags);
1123 trace_seq_puts(s, ": ");
1124 trace_seq_puts(s, field->str);
1126 return trace_handle_return(s);
1130 static enum print_line_t
1131 trace_bputs_raw(struct trace_iterator *iter, int flags,
1132 struct trace_event *event)
1134 struct bputs_entry *field;
1135 struct trace_seq *s = &iter->seq;
1137 trace_assign_type(field, iter->ent);
1139 trace_seq_printf(s, ": %lx : ", field->ip);
1140 trace_seq_puts(s, field->str);
1142 return trace_handle_return(s);
1145 static struct trace_event_functions trace_bputs_funcs = {
1146 .trace = trace_bputs_print,
1147 .raw = trace_bputs_raw,
1150 static struct trace_event trace_bputs_event = {
1151 .type = TRACE_BPUTS,
1152 .funcs = &trace_bputs_funcs,
1156 static enum print_line_t
1157 trace_bprint_print(struct trace_iterator *iter, int flags,
1158 struct trace_event *event)
1160 struct trace_entry *entry = iter->ent;
1161 struct trace_seq *s = &iter->seq;
1162 struct bprint_entry *field;
1164 trace_assign_type(field, entry);
1166 seq_print_ip_sym(s, field->ip, flags);
1167 trace_seq_puts(s, ": ");
1168 trace_seq_bprintf(s, field->fmt, field->buf);
1170 return trace_handle_return(s);
1174 static enum print_line_t
1175 trace_bprint_raw(struct trace_iterator *iter, int flags,
1176 struct trace_event *event)
1178 struct bprint_entry *field;
1179 struct trace_seq *s = &iter->seq;
1181 trace_assign_type(field, iter->ent);
1183 trace_seq_printf(s, ": %lx : ", field->ip);
1184 trace_seq_bprintf(s, field->fmt, field->buf);
1186 return trace_handle_return(s);
1189 static struct trace_event_functions trace_bprint_funcs = {
1190 .trace = trace_bprint_print,
1191 .raw = trace_bprint_raw,
1194 static struct trace_event trace_bprint_event = {
1195 .type = TRACE_BPRINT,
1196 .funcs = &trace_bprint_funcs,
1200 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1201 int flags, struct trace_event *event)
1203 struct print_entry *field;
1204 struct trace_seq *s = &iter->seq;
1206 trace_assign_type(field, iter->ent);
1208 seq_print_ip_sym(s, field->ip, flags);
1209 trace_seq_printf(s, ": %s", field->buf);
1211 return trace_handle_return(s);
1214 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1215 struct trace_event *event)
1217 struct print_entry *field;
1219 trace_assign_type(field, iter->ent);
1221 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1223 return trace_handle_return(&iter->seq);
1226 static struct trace_event_functions trace_print_funcs = {
1227 .trace = trace_print_print,
1228 .raw = trace_print_raw,
1231 static struct trace_event trace_print_event = {
1232 .type = TRACE_PRINT,
1233 .funcs = &trace_print_funcs,
1237 static struct trace_event *events[] __initdata = {
1242 &trace_user_stack_event,
1244 &trace_bprint_event,
1249 __init static int init_events(void)
1251 struct trace_event *event;
1254 for (i = 0; events[i]; i++) {
1257 ret = register_trace_event(event);
1259 printk(KERN_WARNING "event %d failed to register\n",
1267 early_initcall(init_events);