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;
395 nmi = entry->flags & TRACE_FLAG_NMI;
396 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
397 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
400 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
401 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
404 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
405 TRACE_FLAG_PREEMPT_RESCHED)) {
406 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
409 case TRACE_FLAG_NEED_RESCHED:
412 case TRACE_FLAG_PREEMPT_RESCHED:
421 (entry->flags & TRACE_FLAG_NEED_RESCHED_LAZY) ? 'L' : '.';
424 (nmi && hardirq) ? 'Z' :
426 (hardirq && softirq) ? 'H' :
431 trace_seq_printf(s, "%c%c%c%c",
432 irqs_off, need_resched, need_resched_lazy,
435 if (entry->preempt_count)
436 trace_seq_printf(s, "%x", entry->preempt_count);
438 trace_seq_putc(s, '.');
440 if (entry->preempt_lazy_count)
441 trace_seq_printf(s, "%x", entry->preempt_lazy_count);
443 trace_seq_putc(s, '.');
445 if (entry->migrate_disable)
446 trace_seq_printf(s, "%x", entry->migrate_disable);
448 trace_seq_putc(s, '.');
450 return !trace_seq_has_overflowed(s);
454 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
456 char comm[TASK_COMM_LEN];
458 trace_find_cmdline(entry->pid, comm);
460 trace_seq_printf(s, "%8.8s-%-5d %3d",
461 comm, entry->pid, cpu);
463 return trace_print_lat_fmt(s, entry);
467 #define MARK(v, s) {.val = v, .sym = s}
468 /* trace overhead mark */
469 static const struct trace_mark {
470 unsigned long long val; /* unit: nsec */
473 MARK(1000000000ULL , '$'), /* 1 sec */
474 MARK(100000000ULL , '@'), /* 100 msec */
475 MARK(10000000ULL , '*'), /* 10 msec */
476 MARK(1000000ULL , '#'), /* 1000 usecs */
477 MARK(100000ULL , '!'), /* 100 usecs */
478 MARK(10000ULL , '+'), /* 10 usecs */
482 char trace_find_mark(unsigned long long d)
485 int size = ARRAY_SIZE(mark);
487 for (i = 0; i < size; i++) {
492 return (i == size) ? ' ' : mark[i].sym;
496 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
498 struct trace_array *tr = iter->tr;
499 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
500 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
501 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
502 unsigned long long rel_ts = next_ts - iter->ts;
503 struct trace_seq *s = &iter->seq;
506 abs_ts = ns2usecs(abs_ts);
507 rel_ts = ns2usecs(rel_ts);
510 if (verbose && in_ns) {
511 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
512 unsigned long abs_msec = (unsigned long)abs_ts;
513 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
514 unsigned long rel_msec = (unsigned long)rel_ts;
517 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
522 } else if (verbose && !in_ns) {
524 s, "[%016llx] %lld (+%lld): ",
525 iter->ts, abs_ts, rel_ts);
527 } else if (!verbose && in_ns) {
531 trace_find_mark(rel_ts * NSEC_PER_USEC));
533 } else { /* !verbose && !in_ns */
534 trace_seq_printf(s, " %4lld: ", abs_ts);
537 return !trace_seq_has_overflowed(s);
540 int trace_print_context(struct trace_iterator *iter)
542 struct trace_array *tr = iter->tr;
543 struct trace_seq *s = &iter->seq;
544 struct trace_entry *entry = iter->ent;
545 unsigned long long t;
546 unsigned long secs, usec_rem;
547 char comm[TASK_COMM_LEN];
549 trace_find_cmdline(entry->pid, comm);
551 trace_seq_printf(s, "%16s-%-5d [%03d] ",
552 comm, entry->pid, iter->cpu);
554 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
555 trace_print_lat_fmt(s, entry);
557 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
558 t = ns2usecs(iter->ts);
559 usec_rem = do_div(t, USEC_PER_SEC);
560 secs = (unsigned long)t;
561 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
563 trace_seq_printf(s, " %12llu: ", iter->ts);
565 return !trace_seq_has_overflowed(s);
568 int trace_print_lat_context(struct trace_iterator *iter)
570 struct trace_array *tr = iter->tr;
571 /* trace_find_next_entry will reset ent_size */
572 int ent_size = iter->ent_size;
573 struct trace_seq *s = &iter->seq;
575 struct trace_entry *entry = iter->ent,
576 *next_entry = trace_find_next_entry(iter, NULL,
578 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
580 /* Restore the original ent_size */
581 iter->ent_size = ent_size;
587 char comm[TASK_COMM_LEN];
589 trace_find_cmdline(entry->pid, comm);
592 s, "%16s %5d %3d %d %08x %08lx ",
593 comm, entry->pid, iter->cpu, entry->flags,
594 entry->preempt_count, iter->idx);
596 lat_print_generic(s, entry, iter->cpu);
599 lat_print_timestamp(iter, next_ts);
601 return !trace_seq_has_overflowed(s);
604 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
606 static int task_state_char(unsigned long state)
608 int bit = state ? __ffs(state) + 1 : 0;
610 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
614 * ftrace_find_event - find a registered event
615 * @type: the type of event to look for
617 * Returns an event of type @type otherwise NULL
618 * Called with trace_event_read_lock() held.
620 struct trace_event *ftrace_find_event(int type)
622 struct trace_event *event;
625 key = type & (EVENT_HASHSIZE - 1);
627 hlist_for_each_entry(event, &event_hash[key], node) {
628 if (event->type == type)
635 static LIST_HEAD(ftrace_event_list);
637 static int trace_search_list(struct list_head **list)
639 struct trace_event *e;
640 int last = __TRACE_LAST_TYPE;
642 if (list_empty(&ftrace_event_list)) {
643 *list = &ftrace_event_list;
648 * We used up all possible max events,
649 * lets see if somebody freed one.
651 list_for_each_entry(e, &ftrace_event_list, list) {
652 if (e->type != last + 1)
657 /* Did we used up all 65 thousand events??? */
658 if ((last + 1) > TRACE_EVENT_TYPE_MAX)
665 void trace_event_read_lock(void)
667 down_read(&trace_event_sem);
670 void trace_event_read_unlock(void)
672 up_read(&trace_event_sem);
676 * register_trace_event - register output for an event type
677 * @event: the event type to register
679 * Event types are stored in a hash and this hash is used to
680 * find a way to print an event. If the @event->type is set
681 * then it will use that type, otherwise it will assign a
684 * If you assign your own type, please make sure it is added
685 * to the trace_type enum in trace.h, to avoid collisions
686 * with the dynamic types.
688 * Returns the event type number or zero on error.
690 int register_trace_event(struct trace_event *event)
695 down_write(&trace_event_sem);
700 if (WARN_ON(!event->funcs))
703 INIT_LIST_HEAD(&event->list);
706 struct list_head *list = NULL;
708 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
710 event->type = trace_search_list(&list);
716 event->type = next_event_type++;
717 list = &ftrace_event_list;
720 if (WARN_ON(ftrace_find_event(event->type)))
723 list_add_tail(&event->list, list);
725 } else if (event->type > __TRACE_LAST_TYPE) {
726 printk(KERN_WARNING "Need to add type to trace.h\n");
730 /* Is this event already used */
731 if (ftrace_find_event(event->type))
735 if (event->funcs->trace == NULL)
736 event->funcs->trace = trace_nop_print;
737 if (event->funcs->raw == NULL)
738 event->funcs->raw = trace_nop_print;
739 if (event->funcs->hex == NULL)
740 event->funcs->hex = trace_nop_print;
741 if (event->funcs->binary == NULL)
742 event->funcs->binary = trace_nop_print;
744 key = event->type & (EVENT_HASHSIZE - 1);
746 hlist_add_head(&event->node, &event_hash[key]);
750 up_write(&trace_event_sem);
754 EXPORT_SYMBOL_GPL(register_trace_event);
757 * Used by module code with the trace_event_sem held for write.
759 int __unregister_trace_event(struct trace_event *event)
761 hlist_del(&event->node);
762 list_del(&event->list);
767 * unregister_trace_event - remove a no longer used event
768 * @event: the event to remove
770 int unregister_trace_event(struct trace_event *event)
772 down_write(&trace_event_sem);
773 __unregister_trace_event(event);
774 up_write(&trace_event_sem);
778 EXPORT_SYMBOL_GPL(unregister_trace_event);
784 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
785 struct trace_event *event)
787 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
789 return trace_handle_return(&iter->seq);
793 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
794 struct trace_event *event)
796 struct ftrace_entry *field;
797 struct trace_seq *s = &iter->seq;
799 trace_assign_type(field, iter->ent);
801 seq_print_ip_sym(s, field->ip, flags);
803 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
804 trace_seq_puts(s, " <-");
805 seq_print_ip_sym(s, field->parent_ip, flags);
808 trace_seq_putc(s, '\n');
810 return trace_handle_return(s);
813 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
814 struct trace_event *event)
816 struct ftrace_entry *field;
818 trace_assign_type(field, iter->ent);
820 trace_seq_printf(&iter->seq, "%lx %lx\n",
824 return trace_handle_return(&iter->seq);
827 static enum print_line_t trace_fn_hex(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_PUT_HEX_FIELD(s, field->ip);
836 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
838 return trace_handle_return(s);
841 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
842 struct trace_event *event)
844 struct ftrace_entry *field;
845 struct trace_seq *s = &iter->seq;
847 trace_assign_type(field, iter->ent);
849 SEQ_PUT_FIELD(s, field->ip);
850 SEQ_PUT_FIELD(s, field->parent_ip);
852 return trace_handle_return(s);
855 static struct trace_event_functions trace_fn_funcs = {
856 .trace = trace_fn_trace,
859 .binary = trace_fn_bin,
862 static struct trace_event trace_fn_event = {
864 .funcs = &trace_fn_funcs,
867 /* TRACE_CTX an TRACE_WAKE */
868 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
871 struct ctx_switch_entry *field;
872 char comm[TASK_COMM_LEN];
876 trace_assign_type(field, iter->ent);
878 T = task_state_char(field->next_state);
879 S = task_state_char(field->prev_state);
880 trace_find_cmdline(field->next_pid, comm);
881 trace_seq_printf(&iter->seq,
882 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
891 return trace_handle_return(&iter->seq);
894 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
895 struct trace_event *event)
897 return trace_ctxwake_print(iter, "==>");
900 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
901 int flags, struct trace_event *event)
903 return trace_ctxwake_print(iter, " +");
906 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
908 struct ctx_switch_entry *field;
911 trace_assign_type(field, iter->ent);
914 S = task_state_char(field->prev_state);
915 T = task_state_char(field->next_state);
916 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
925 return trace_handle_return(&iter->seq);
928 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
929 struct trace_event *event)
931 return trace_ctxwake_raw(iter, 0);
934 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
935 struct trace_event *event)
937 return trace_ctxwake_raw(iter, '+');
941 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
943 struct ctx_switch_entry *field;
944 struct trace_seq *s = &iter->seq;
947 trace_assign_type(field, iter->ent);
950 S = task_state_char(field->prev_state);
951 T = task_state_char(field->next_state);
953 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
954 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
955 SEQ_PUT_HEX_FIELD(s, S);
956 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
957 SEQ_PUT_HEX_FIELD(s, field->next_pid);
958 SEQ_PUT_HEX_FIELD(s, field->next_prio);
959 SEQ_PUT_HEX_FIELD(s, T);
961 return trace_handle_return(s);
964 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
965 struct trace_event *event)
967 return trace_ctxwake_hex(iter, 0);
970 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
971 struct trace_event *event)
973 return trace_ctxwake_hex(iter, '+');
976 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
977 int flags, struct trace_event *event)
979 struct ctx_switch_entry *field;
980 struct trace_seq *s = &iter->seq;
982 trace_assign_type(field, iter->ent);
984 SEQ_PUT_FIELD(s, field->prev_pid);
985 SEQ_PUT_FIELD(s, field->prev_prio);
986 SEQ_PUT_FIELD(s, field->prev_state);
987 SEQ_PUT_FIELD(s, field->next_cpu);
988 SEQ_PUT_FIELD(s, field->next_pid);
989 SEQ_PUT_FIELD(s, field->next_prio);
990 SEQ_PUT_FIELD(s, field->next_state);
992 return trace_handle_return(s);
995 static struct trace_event_functions trace_ctx_funcs = {
996 .trace = trace_ctx_print,
997 .raw = trace_ctx_raw,
998 .hex = trace_ctx_hex,
999 .binary = trace_ctxwake_bin,
1002 static struct trace_event trace_ctx_event = {
1004 .funcs = &trace_ctx_funcs,
1007 static struct trace_event_functions trace_wake_funcs = {
1008 .trace = trace_wake_print,
1009 .raw = trace_wake_raw,
1010 .hex = trace_wake_hex,
1011 .binary = trace_ctxwake_bin,
1014 static struct trace_event trace_wake_event = {
1016 .funcs = &trace_wake_funcs,
1021 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1022 int flags, struct trace_event *event)
1024 struct stack_entry *field;
1025 struct trace_seq *s = &iter->seq;
1029 trace_assign_type(field, iter->ent);
1030 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1032 trace_seq_puts(s, "<stack trace>\n");
1034 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1036 if (trace_seq_has_overflowed(s))
1039 trace_seq_puts(s, " => ");
1040 seq_print_ip_sym(s, *p, flags);
1041 trace_seq_putc(s, '\n');
1044 return trace_handle_return(s);
1047 static struct trace_event_functions trace_stack_funcs = {
1048 .trace = trace_stack_print,
1051 static struct trace_event trace_stack_event = {
1052 .type = TRACE_STACK,
1053 .funcs = &trace_stack_funcs,
1056 /* TRACE_USER_STACK */
1057 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1058 int flags, struct trace_event *event)
1060 struct trace_array *tr = iter->tr;
1061 struct userstack_entry *field;
1062 struct trace_seq *s = &iter->seq;
1063 struct mm_struct *mm = NULL;
1066 trace_assign_type(field, iter->ent);
1068 trace_seq_puts(s, "<user stack trace>\n");
1070 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1071 struct task_struct *task;
1073 * we do the lookup on the thread group leader,
1074 * since individual threads might have already quit!
1077 task = find_task_by_vpid(field->tgid);
1079 mm = get_task_mm(task);
1083 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1084 unsigned long ip = field->caller[i];
1086 if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
1089 trace_seq_puts(s, " => ");
1092 trace_seq_puts(s, "??");
1093 trace_seq_putc(s, '\n');
1097 seq_print_user_ip(s, mm, ip, flags);
1098 trace_seq_putc(s, '\n');
1104 return trace_handle_return(s);
1107 static struct trace_event_functions trace_user_stack_funcs = {
1108 .trace = trace_user_stack_print,
1111 static struct trace_event trace_user_stack_event = {
1112 .type = TRACE_USER_STACK,
1113 .funcs = &trace_user_stack_funcs,
1117 static enum print_line_t
1118 trace_hwlat_print(struct trace_iterator *iter, int flags,
1119 struct trace_event *event)
1121 struct trace_entry *entry = iter->ent;
1122 struct trace_seq *s = &iter->seq;
1123 struct hwlat_entry *field;
1125 trace_assign_type(field, entry);
1127 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%ld.%09ld",
1130 field->outer_duration,
1131 field->timestamp.tv_sec,
1132 field->timestamp.tv_nsec);
1134 if (field->nmi_count) {
1136 * The generic sched_clock() is not NMI safe, thus
1137 * we only record the count and not the time.
1139 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1140 trace_seq_printf(s, " nmi-total:%llu",
1141 field->nmi_total_ts);
1142 trace_seq_printf(s, " nmi-count:%u",
1146 trace_seq_putc(s, '\n');
1148 return trace_handle_return(s);
1152 static enum print_line_t
1153 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1154 struct trace_event *event)
1156 struct hwlat_entry *field;
1157 struct trace_seq *s = &iter->seq;
1159 trace_assign_type(field, iter->ent);
1161 trace_seq_printf(s, "%llu %lld %ld %09ld %u\n",
1163 field->outer_duration,
1164 field->timestamp.tv_sec,
1165 field->timestamp.tv_nsec,
1168 return trace_handle_return(s);
1171 static struct trace_event_functions trace_hwlat_funcs = {
1172 .trace = trace_hwlat_print,
1173 .raw = trace_hwlat_raw,
1176 static struct trace_event trace_hwlat_event = {
1177 .type = TRACE_HWLAT,
1178 .funcs = &trace_hwlat_funcs,
1182 static enum print_line_t
1183 trace_bputs_print(struct trace_iterator *iter, int flags,
1184 struct trace_event *event)
1186 struct trace_entry *entry = iter->ent;
1187 struct trace_seq *s = &iter->seq;
1188 struct bputs_entry *field;
1190 trace_assign_type(field, entry);
1192 seq_print_ip_sym(s, field->ip, flags);
1193 trace_seq_puts(s, ": ");
1194 trace_seq_puts(s, field->str);
1196 return trace_handle_return(s);
1200 static enum print_line_t
1201 trace_bputs_raw(struct trace_iterator *iter, int flags,
1202 struct trace_event *event)
1204 struct bputs_entry *field;
1205 struct trace_seq *s = &iter->seq;
1207 trace_assign_type(field, iter->ent);
1209 trace_seq_printf(s, ": %lx : ", field->ip);
1210 trace_seq_puts(s, field->str);
1212 return trace_handle_return(s);
1215 static struct trace_event_functions trace_bputs_funcs = {
1216 .trace = trace_bputs_print,
1217 .raw = trace_bputs_raw,
1220 static struct trace_event trace_bputs_event = {
1221 .type = TRACE_BPUTS,
1222 .funcs = &trace_bputs_funcs,
1226 static enum print_line_t
1227 trace_bprint_print(struct trace_iterator *iter, int flags,
1228 struct trace_event *event)
1230 struct trace_entry *entry = iter->ent;
1231 struct trace_seq *s = &iter->seq;
1232 struct bprint_entry *field;
1234 trace_assign_type(field, entry);
1236 seq_print_ip_sym(s, field->ip, flags);
1237 trace_seq_puts(s, ": ");
1238 trace_seq_bprintf(s, field->fmt, field->buf);
1240 return trace_handle_return(s);
1244 static enum print_line_t
1245 trace_bprint_raw(struct trace_iterator *iter, int flags,
1246 struct trace_event *event)
1248 struct bprint_entry *field;
1249 struct trace_seq *s = &iter->seq;
1251 trace_assign_type(field, iter->ent);
1253 trace_seq_printf(s, ": %lx : ", field->ip);
1254 trace_seq_bprintf(s, field->fmt, field->buf);
1256 return trace_handle_return(s);
1259 static struct trace_event_functions trace_bprint_funcs = {
1260 .trace = trace_bprint_print,
1261 .raw = trace_bprint_raw,
1264 static struct trace_event trace_bprint_event = {
1265 .type = TRACE_BPRINT,
1266 .funcs = &trace_bprint_funcs,
1270 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1271 int flags, struct trace_event *event)
1273 struct print_entry *field;
1274 struct trace_seq *s = &iter->seq;
1276 trace_assign_type(field, iter->ent);
1278 seq_print_ip_sym(s, field->ip, flags);
1279 trace_seq_printf(s, ": %s", field->buf);
1281 return trace_handle_return(s);
1284 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1285 struct trace_event *event)
1287 struct print_entry *field;
1289 trace_assign_type(field, iter->ent);
1291 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1293 return trace_handle_return(&iter->seq);
1296 static struct trace_event_functions trace_print_funcs = {
1297 .trace = trace_print_print,
1298 .raw = trace_print_raw,
1301 static struct trace_event trace_print_event = {
1302 .type = TRACE_PRINT,
1303 .funcs = &trace_print_funcs,
1307 static struct trace_event *events[] __initdata = {
1312 &trace_user_stack_event,
1314 &trace_bprint_event,
1320 __init static int init_events(void)
1322 struct trace_event *event;
1325 for (i = 0; events[i]; i++) {
1328 ret = register_trace_event(event);
1330 printk(KERN_WARNING "event %d failed to register\n",
1338 early_initcall(init_events);