4 * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
8 #include <linux/module.h>
9 #include <linux/mutex.h>
10 #include <linux/ftrace.h>
12 #include "trace_output.h"
14 /* must be a power of 2 */
15 #define EVENT_HASHSIZE 128
17 DECLARE_RWSEM(trace_event_sem);
19 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
21 static int next_event_type = __TRACE_LAST_TYPE + 1;
23 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
25 struct trace_seq *s = &iter->seq;
26 struct trace_entry *entry = iter->ent;
27 struct bputs_entry *field;
29 trace_assign_type(field, entry);
31 trace_seq_puts(s, field->str);
33 return trace_handle_return(s);
36 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
38 struct trace_seq *s = &iter->seq;
39 struct trace_entry *entry = iter->ent;
40 struct bprint_entry *field;
42 trace_assign_type(field, entry);
44 trace_seq_bprintf(s, field->fmt, field->buf);
46 return trace_handle_return(s);
49 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
51 struct trace_seq *s = &iter->seq;
52 struct trace_entry *entry = iter->ent;
53 struct print_entry *field;
55 trace_assign_type(field, entry);
57 trace_seq_puts(s, field->buf);
59 return trace_handle_return(s);
63 trace_print_flags_seq(struct trace_seq *p, const char *delim,
65 const struct trace_print_flags *flag_array)
69 const char *ret = trace_seq_buffer_ptr(p);
72 for (i = 0; flag_array[i].name && flags; i++) {
74 mask = flag_array[i].mask;
75 if ((flags & mask) != mask)
78 str = flag_array[i].name;
81 trace_seq_puts(p, delim);
84 trace_seq_puts(p, str);
87 /* check for left over flags */
90 trace_seq_puts(p, delim);
91 trace_seq_printf(p, "0x%lx", flags);
98 EXPORT_SYMBOL(trace_print_flags_seq);
101 trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
102 const struct trace_print_flags *symbol_array)
105 const char *ret = trace_seq_buffer_ptr(p);
107 for (i = 0; symbol_array[i].name; i++) {
109 if (val != symbol_array[i].mask)
112 trace_seq_puts(p, symbol_array[i].name);
116 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
117 trace_seq_printf(p, "0x%lx", val);
119 trace_seq_putc(p, 0);
123 EXPORT_SYMBOL(trace_print_symbols_seq);
125 #if BITS_PER_LONG == 32
127 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
128 const struct trace_print_flags_u64 *symbol_array)
131 const char *ret = trace_seq_buffer_ptr(p);
133 for (i = 0; symbol_array[i].name; i++) {
135 if (val != symbol_array[i].mask)
138 trace_seq_puts(p, symbol_array[i].name);
142 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
143 trace_seq_printf(p, "0x%llx", val);
145 trace_seq_putc(p, 0);
149 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
153 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
154 unsigned int bitmask_size)
156 const char *ret = trace_seq_buffer_ptr(p);
158 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
159 trace_seq_putc(p, 0);
163 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
166 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
169 const char *ret = trace_seq_buffer_ptr(p);
171 for (i = 0; i < buf_len; i++)
172 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
174 trace_seq_putc(p, 0);
178 EXPORT_SYMBOL(trace_print_hex_seq);
181 trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
184 const char *ret = trace_seq_buffer_ptr(p);
185 const char *prefix = "";
186 void *ptr = (void *)buf;
187 size_t buf_len = count * el_size;
189 trace_seq_putc(p, '{');
191 while (ptr < buf + buf_len) {
194 trace_seq_printf(p, "%s0x%x", prefix,
198 trace_seq_printf(p, "%s0x%x", prefix,
202 trace_seq_printf(p, "%s0x%x", prefix,
206 trace_seq_printf(p, "%s0x%llx", prefix,
210 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
218 trace_seq_putc(p, '}');
219 trace_seq_putc(p, 0);
223 EXPORT_SYMBOL(trace_print_array_seq);
225 int trace_raw_output_prep(struct trace_iterator *iter,
226 struct trace_event *trace_event)
228 struct trace_event_call *event;
229 struct trace_seq *s = &iter->seq;
230 struct trace_seq *p = &iter->tmp_seq;
231 struct trace_entry *entry;
233 event = container_of(trace_event, struct trace_event_call, event);
236 if (entry->type != event->event.type) {
238 return TRACE_TYPE_UNHANDLED;
242 trace_seq_printf(s, "%s: ", trace_event_name(event));
244 return trace_handle_return(s);
246 EXPORT_SYMBOL(trace_raw_output_prep);
248 static int trace_output_raw(struct trace_iterator *iter, char *name,
249 char *fmt, va_list ap)
251 struct trace_seq *s = &iter->seq;
253 trace_seq_printf(s, "%s: ", name);
254 trace_seq_vprintf(s, fmt, ap);
256 return trace_handle_return(s);
259 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
265 ret = trace_output_raw(iter, name, fmt, ap);
270 EXPORT_SYMBOL_GPL(trace_output_call);
272 #ifdef CONFIG_KRETPROBES
273 static inline const char *kretprobed(const char *name)
275 static const char tramp_name[] = "kretprobe_trampoline";
276 int size = sizeof(tramp_name);
278 if (strncmp(tramp_name, name, size) == 0)
279 return "[unknown/kretprobe'd]";
283 static inline const char *kretprobed(const char *name)
287 #endif /* CONFIG_KRETPROBES */
290 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
292 #ifdef CONFIG_KALLSYMS
293 char str[KSYM_SYMBOL_LEN];
296 kallsyms_lookup(address, NULL, NULL, NULL, str);
298 name = kretprobed(str);
300 trace_seq_printf(s, fmt, name);
305 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
306 unsigned long address)
308 #ifdef CONFIG_KALLSYMS
309 char str[KSYM_SYMBOL_LEN];
312 sprint_symbol(str, address);
313 name = kretprobed(str);
315 trace_seq_printf(s, fmt, name);
320 # define IP_FMT "%08lx"
322 # define IP_FMT "%016lx"
325 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
326 unsigned long ip, unsigned long sym_flags)
328 struct file *file = NULL;
329 unsigned long vmstart = 0;
336 const struct vm_area_struct *vma;
338 down_read(&mm->mmap_sem);
339 vma = find_vma(mm, ip);
342 vmstart = vma->vm_start;
345 ret = trace_seq_path(s, &file->f_path);
347 trace_seq_printf(s, "[+0x%lx]",
350 up_read(&mm->mmap_sem);
352 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
353 trace_seq_printf(s, " <" IP_FMT ">", ip);
354 return !trace_seq_has_overflowed(s);
358 seq_print_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)
437 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
438 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
441 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
442 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
445 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
446 TRACE_FLAG_PREEMPT_RESCHED)) {
447 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
450 case TRACE_FLAG_NEED_RESCHED:
453 case TRACE_FLAG_PREEMPT_RESCHED:
462 (hardirq && softirq) ? 'H' :
467 trace_seq_printf(s, "%c%c%c",
468 irqs_off, need_resched, hardsoft_irq);
470 if (entry->preempt_count)
471 trace_seq_printf(s, "%x", entry->preempt_count);
473 trace_seq_putc(s, '.');
475 return !trace_seq_has_overflowed(s);
479 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
481 char comm[TASK_COMM_LEN];
483 trace_find_cmdline(entry->pid, comm);
485 trace_seq_printf(s, "%8.8s-%-5d %3d",
486 comm, entry->pid, cpu);
488 return trace_print_lat_fmt(s, entry);
492 #define MARK(v, s) {.val = v, .sym = s}
493 /* trace overhead mark */
494 static const struct trace_mark {
495 unsigned long long val; /* unit: nsec */
498 MARK(1000000000ULL , '$'), /* 1 sec */
499 MARK(100000000ULL , '@'), /* 100 msec */
500 MARK(10000000ULL , '*'), /* 10 msec */
501 MARK(1000000ULL , '#'), /* 1000 usecs */
502 MARK(100000ULL , '!'), /* 100 usecs */
503 MARK(10000ULL , '+'), /* 10 usecs */
507 char trace_find_mark(unsigned long long d)
510 int size = ARRAY_SIZE(mark);
512 for (i = 0; i < size; i++) {
517 return (i == size) ? ' ' : mark[i].sym;
521 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
523 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
524 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
525 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
526 unsigned long long rel_ts = next_ts - iter->ts;
527 struct trace_seq *s = &iter->seq;
530 abs_ts = ns2usecs(abs_ts);
531 rel_ts = ns2usecs(rel_ts);
534 if (verbose && in_ns) {
535 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
536 unsigned long abs_msec = (unsigned long)abs_ts;
537 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
538 unsigned long rel_msec = (unsigned long)rel_ts;
541 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
546 } else if (verbose && !in_ns) {
548 s, "[%016llx] %lld (+%lld): ",
549 iter->ts, abs_ts, rel_ts);
551 } else if (!verbose && in_ns) {
555 trace_find_mark(rel_ts * NSEC_PER_USEC));
557 } else { /* !verbose && !in_ns */
558 trace_seq_printf(s, " %4lld: ", abs_ts);
561 return !trace_seq_has_overflowed(s);
564 int trace_print_context(struct trace_iterator *iter)
566 struct trace_seq *s = &iter->seq;
567 struct trace_entry *entry = iter->ent;
568 unsigned long long t;
569 unsigned long secs, usec_rem;
570 char comm[TASK_COMM_LEN];
572 trace_find_cmdline(entry->pid, comm);
574 trace_seq_printf(s, "%16s-%-5d [%03d] ",
575 comm, entry->pid, iter->cpu);
577 if (trace_flags & TRACE_ITER_IRQ_INFO)
578 trace_print_lat_fmt(s, entry);
580 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
581 t = ns2usecs(iter->ts);
582 usec_rem = do_div(t, USEC_PER_SEC);
583 secs = (unsigned long)t;
584 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
586 trace_seq_printf(s, " %12llu: ", iter->ts);
588 return !trace_seq_has_overflowed(s);
591 int trace_print_lat_context(struct trace_iterator *iter)
594 /* trace_find_next_entry will reset ent_size */
595 int ent_size = iter->ent_size;
596 struct trace_seq *s = &iter->seq;
597 struct trace_entry *entry = iter->ent,
598 *next_entry = trace_find_next_entry(iter, NULL,
600 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
602 /* Restore the original ent_size */
603 iter->ent_size = ent_size;
609 char comm[TASK_COMM_LEN];
611 trace_find_cmdline(entry->pid, comm);
614 s, "%16s %5d %3d %d %08x %08lx ",
615 comm, entry->pid, iter->cpu, entry->flags,
616 entry->preempt_count, iter->idx);
618 lat_print_generic(s, entry, iter->cpu);
621 lat_print_timestamp(iter, next_ts);
623 return !trace_seq_has_overflowed(s);
626 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
628 static int task_state_char(unsigned long state)
630 int bit = state ? __ffs(state) + 1 : 0;
632 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
636 * ftrace_find_event - find a registered event
637 * @type: the type of event to look for
639 * Returns an event of type @type otherwise NULL
640 * Called with trace_event_read_lock() held.
642 struct trace_event *ftrace_find_event(int type)
644 struct trace_event *event;
647 key = type & (EVENT_HASHSIZE - 1);
649 hlist_for_each_entry(event, &event_hash[key], node) {
650 if (event->type == type)
657 static LIST_HEAD(ftrace_event_list);
659 static int trace_search_list(struct list_head **list)
661 struct trace_event *e;
662 int last = __TRACE_LAST_TYPE;
664 if (list_empty(&ftrace_event_list)) {
665 *list = &ftrace_event_list;
670 * We used up all possible max events,
671 * lets see if somebody freed one.
673 list_for_each_entry(e, &ftrace_event_list, list) {
674 if (e->type != last + 1)
679 /* Did we used up all 65 thousand events??? */
680 if ((last + 1) > TRACE_EVENT_TYPE_MAX)
687 void trace_event_read_lock(void)
689 down_read(&trace_event_sem);
692 void trace_event_read_unlock(void)
694 up_read(&trace_event_sem);
698 * register_trace_event - register output for an event type
699 * @event: the event type to register
701 * Event types are stored in a hash and this hash is used to
702 * find a way to print an event. If the @event->type is set
703 * then it will use that type, otherwise it will assign a
706 * If you assign your own type, please make sure it is added
707 * to the trace_type enum in trace.h, to avoid collisions
708 * with the dynamic types.
710 * Returns the event type number or zero on error.
712 int register_trace_event(struct trace_event *event)
717 down_write(&trace_event_sem);
722 if (WARN_ON(!event->funcs))
725 INIT_LIST_HEAD(&event->list);
728 struct list_head *list = NULL;
730 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
732 event->type = trace_search_list(&list);
738 event->type = next_event_type++;
739 list = &ftrace_event_list;
742 if (WARN_ON(ftrace_find_event(event->type)))
745 list_add_tail(&event->list, list);
747 } else if (event->type > __TRACE_LAST_TYPE) {
748 printk(KERN_WARNING "Need to add type to trace.h\n");
752 /* Is this event already used */
753 if (ftrace_find_event(event->type))
757 if (event->funcs->trace == NULL)
758 event->funcs->trace = trace_nop_print;
759 if (event->funcs->raw == NULL)
760 event->funcs->raw = trace_nop_print;
761 if (event->funcs->hex == NULL)
762 event->funcs->hex = trace_nop_print;
763 if (event->funcs->binary == NULL)
764 event->funcs->binary = trace_nop_print;
766 key = event->type & (EVENT_HASHSIZE - 1);
768 hlist_add_head(&event->node, &event_hash[key]);
772 up_write(&trace_event_sem);
776 EXPORT_SYMBOL_GPL(register_trace_event);
779 * Used by module code with the trace_event_sem held for write.
781 int __unregister_trace_event(struct trace_event *event)
783 hlist_del(&event->node);
784 list_del(&event->list);
789 * unregister_trace_event - remove a no longer used event
790 * @event: the event to remove
792 int unregister_trace_event(struct trace_event *event)
794 down_write(&trace_event_sem);
795 __unregister_trace_event(event);
796 up_write(&trace_event_sem);
800 EXPORT_SYMBOL_GPL(unregister_trace_event);
806 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
807 struct trace_event *event)
809 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
811 return trace_handle_return(&iter->seq);
815 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
816 struct trace_event *event)
818 struct ftrace_entry *field;
819 struct trace_seq *s = &iter->seq;
821 trace_assign_type(field, iter->ent);
823 seq_print_ip_sym(s, field->ip, flags);
825 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
826 trace_seq_puts(s, " <-");
827 seq_print_ip_sym(s, field->parent_ip, flags);
830 trace_seq_putc(s, '\n');
832 return trace_handle_return(s);
835 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
836 struct trace_event *event)
838 struct ftrace_entry *field;
840 trace_assign_type(field, iter->ent);
842 trace_seq_printf(&iter->seq, "%lx %lx\n",
846 return trace_handle_return(&iter->seq);
849 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
850 struct trace_event *event)
852 struct ftrace_entry *field;
853 struct trace_seq *s = &iter->seq;
855 trace_assign_type(field, iter->ent);
857 SEQ_PUT_HEX_FIELD(s, field->ip);
858 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
860 return trace_handle_return(s);
863 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
864 struct trace_event *event)
866 struct ftrace_entry *field;
867 struct trace_seq *s = &iter->seq;
869 trace_assign_type(field, iter->ent);
871 SEQ_PUT_FIELD(s, field->ip);
872 SEQ_PUT_FIELD(s, field->parent_ip);
874 return trace_handle_return(s);
877 static struct trace_event_functions trace_fn_funcs = {
878 .trace = trace_fn_trace,
881 .binary = trace_fn_bin,
884 static struct trace_event trace_fn_event = {
886 .funcs = &trace_fn_funcs,
889 /* TRACE_CTX an TRACE_WAKE */
890 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
893 struct ctx_switch_entry *field;
894 char comm[TASK_COMM_LEN];
898 trace_assign_type(field, iter->ent);
900 T = task_state_char(field->next_state);
901 S = task_state_char(field->prev_state);
902 trace_find_cmdline(field->next_pid, comm);
903 trace_seq_printf(&iter->seq,
904 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
913 return trace_handle_return(&iter->seq);
916 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
917 struct trace_event *event)
919 return trace_ctxwake_print(iter, "==>");
922 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
923 int flags, struct trace_event *event)
925 return trace_ctxwake_print(iter, " +");
928 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
930 struct ctx_switch_entry *field;
933 trace_assign_type(field, iter->ent);
936 S = task_state_char(field->prev_state);
937 T = task_state_char(field->next_state);
938 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
947 return trace_handle_return(&iter->seq);
950 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
951 struct trace_event *event)
953 return trace_ctxwake_raw(iter, 0);
956 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
957 struct trace_event *event)
959 return trace_ctxwake_raw(iter, '+');
963 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
965 struct ctx_switch_entry *field;
966 struct trace_seq *s = &iter->seq;
969 trace_assign_type(field, iter->ent);
972 S = task_state_char(field->prev_state);
973 T = task_state_char(field->next_state);
975 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
976 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
977 SEQ_PUT_HEX_FIELD(s, S);
978 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
979 SEQ_PUT_HEX_FIELD(s, field->next_pid);
980 SEQ_PUT_HEX_FIELD(s, field->next_prio);
981 SEQ_PUT_HEX_FIELD(s, T);
983 return trace_handle_return(s);
986 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
987 struct trace_event *event)
989 return trace_ctxwake_hex(iter, 0);
992 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
993 struct trace_event *event)
995 return trace_ctxwake_hex(iter, '+');
998 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
999 int flags, struct trace_event *event)
1001 struct ctx_switch_entry *field;
1002 struct trace_seq *s = &iter->seq;
1004 trace_assign_type(field, iter->ent);
1006 SEQ_PUT_FIELD(s, field->prev_pid);
1007 SEQ_PUT_FIELD(s, field->prev_prio);
1008 SEQ_PUT_FIELD(s, field->prev_state);
1009 SEQ_PUT_FIELD(s, field->next_cpu);
1010 SEQ_PUT_FIELD(s, field->next_pid);
1011 SEQ_PUT_FIELD(s, field->next_prio);
1012 SEQ_PUT_FIELD(s, field->next_state);
1014 return trace_handle_return(s);
1017 static struct trace_event_functions trace_ctx_funcs = {
1018 .trace = trace_ctx_print,
1019 .raw = trace_ctx_raw,
1020 .hex = trace_ctx_hex,
1021 .binary = trace_ctxwake_bin,
1024 static struct trace_event trace_ctx_event = {
1026 .funcs = &trace_ctx_funcs,
1029 static struct trace_event_functions trace_wake_funcs = {
1030 .trace = trace_wake_print,
1031 .raw = trace_wake_raw,
1032 .hex = trace_wake_hex,
1033 .binary = trace_ctxwake_bin,
1036 static struct trace_event trace_wake_event = {
1038 .funcs = &trace_wake_funcs,
1043 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1044 int flags, struct trace_event *event)
1046 struct stack_entry *field;
1047 struct trace_seq *s = &iter->seq;
1051 trace_assign_type(field, iter->ent);
1052 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1054 trace_seq_puts(s, "<stack trace>\n");
1056 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1058 if (trace_seq_has_overflowed(s))
1061 trace_seq_puts(s, " => ");
1062 seq_print_ip_sym(s, *p, flags);
1063 trace_seq_putc(s, '\n');
1066 return trace_handle_return(s);
1069 static struct trace_event_functions trace_stack_funcs = {
1070 .trace = trace_stack_print,
1073 static struct trace_event trace_stack_event = {
1074 .type = TRACE_STACK,
1075 .funcs = &trace_stack_funcs,
1078 /* TRACE_USER_STACK */
1079 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1080 int flags, struct trace_event *event)
1082 struct userstack_entry *field;
1083 struct trace_seq *s = &iter->seq;
1085 trace_assign_type(field, iter->ent);
1087 trace_seq_puts(s, "<user stack trace>\n");
1088 seq_print_userip_objs(field, s, flags);
1090 return trace_handle_return(s);
1093 static struct trace_event_functions trace_user_stack_funcs = {
1094 .trace = trace_user_stack_print,
1097 static struct trace_event trace_user_stack_event = {
1098 .type = TRACE_USER_STACK,
1099 .funcs = &trace_user_stack_funcs,
1103 static enum print_line_t
1104 trace_bputs_print(struct trace_iterator *iter, int flags,
1105 struct trace_event *event)
1107 struct trace_entry *entry = iter->ent;
1108 struct trace_seq *s = &iter->seq;
1109 struct bputs_entry *field;
1111 trace_assign_type(field, entry);
1113 seq_print_ip_sym(s, field->ip, flags);
1114 trace_seq_puts(s, ": ");
1115 trace_seq_puts(s, field->str);
1117 return trace_handle_return(s);
1121 static enum print_line_t
1122 trace_bputs_raw(struct trace_iterator *iter, int flags,
1123 struct trace_event *event)
1125 struct bputs_entry *field;
1126 struct trace_seq *s = &iter->seq;
1128 trace_assign_type(field, iter->ent);
1130 trace_seq_printf(s, ": %lx : ", field->ip);
1131 trace_seq_puts(s, field->str);
1133 return trace_handle_return(s);
1136 static struct trace_event_functions trace_bputs_funcs = {
1137 .trace = trace_bputs_print,
1138 .raw = trace_bputs_raw,
1141 static struct trace_event trace_bputs_event = {
1142 .type = TRACE_BPUTS,
1143 .funcs = &trace_bputs_funcs,
1147 static enum print_line_t
1148 trace_bprint_print(struct trace_iterator *iter, int flags,
1149 struct trace_event *event)
1151 struct trace_entry *entry = iter->ent;
1152 struct trace_seq *s = &iter->seq;
1153 struct bprint_entry *field;
1155 trace_assign_type(field, entry);
1157 seq_print_ip_sym(s, field->ip, flags);
1158 trace_seq_puts(s, ": ");
1159 trace_seq_bprintf(s, field->fmt, field->buf);
1161 return trace_handle_return(s);
1165 static enum print_line_t
1166 trace_bprint_raw(struct trace_iterator *iter, int flags,
1167 struct trace_event *event)
1169 struct bprint_entry *field;
1170 struct trace_seq *s = &iter->seq;
1172 trace_assign_type(field, iter->ent);
1174 trace_seq_printf(s, ": %lx : ", field->ip);
1175 trace_seq_bprintf(s, field->fmt, field->buf);
1177 return trace_handle_return(s);
1180 static struct trace_event_functions trace_bprint_funcs = {
1181 .trace = trace_bprint_print,
1182 .raw = trace_bprint_raw,
1185 static struct trace_event trace_bprint_event = {
1186 .type = TRACE_BPRINT,
1187 .funcs = &trace_bprint_funcs,
1191 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1192 int flags, struct trace_event *event)
1194 struct print_entry *field;
1195 struct trace_seq *s = &iter->seq;
1197 trace_assign_type(field, iter->ent);
1199 seq_print_ip_sym(s, field->ip, flags);
1200 trace_seq_printf(s, ": %s", field->buf);
1202 return trace_handle_return(s);
1205 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1206 struct trace_event *event)
1208 struct print_entry *field;
1210 trace_assign_type(field, iter->ent);
1212 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1214 return trace_handle_return(&iter->seq);
1217 static struct trace_event_functions trace_print_funcs = {
1218 .trace = trace_print_print,
1219 .raw = trace_print_raw,
1222 static struct trace_event trace_print_event = {
1223 .type = TRACE_PRINT,
1224 .funcs = &trace_print_funcs,
1228 static struct trace_event *events[] __initdata = {
1233 &trace_user_stack_event,
1235 &trace_bprint_event,
1240 __init static int init_events(void)
1242 struct trace_event *event;
1245 for (i = 0; events[i]; i++) {
1248 ret = register_trace_event(event);
1250 printk(KERN_WARNING "event %d failed to register\n",
1258 early_initcall(init_events);