1 // SPDX-License-Identifier: GPL-2.0
5 * 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>
11 #include <linux/sched/clock.h>
12 #include <linux/sched/mm.h>
14 #include "trace_output.h"
16 /* must be a power of 2 */
17 #define EVENT_HASHSIZE 128
19 DECLARE_RWSEM(trace_event_sem);
21 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
23 static int next_event_type = __TRACE_LAST_TYPE;
25 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
27 struct trace_seq *s = &iter->seq;
28 struct trace_entry *entry = iter->ent;
29 struct bputs_entry *field;
31 trace_assign_type(field, entry);
33 trace_seq_puts(s, field->str);
35 return trace_handle_return(s);
38 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
40 struct trace_seq *s = &iter->seq;
41 struct trace_entry *entry = iter->ent;
42 struct bprint_entry *field;
44 trace_assign_type(field, entry);
46 trace_seq_bprintf(s, field->fmt, field->buf);
48 return trace_handle_return(s);
51 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
53 struct trace_seq *s = &iter->seq;
54 struct trace_entry *entry = iter->ent;
55 struct print_entry *field;
57 trace_assign_type(field, entry);
59 trace_seq_puts(s, field->buf);
61 return trace_handle_return(s);
65 trace_print_flags_seq(struct trace_seq *p, const char *delim,
67 const struct trace_print_flags *flag_array)
71 const char *ret = trace_seq_buffer_ptr(p);
74 for (i = 0; flag_array[i].name && flags; i++) {
76 mask = flag_array[i].mask;
77 if ((flags & mask) != mask)
80 str = flag_array[i].name;
83 trace_seq_puts(p, delim);
86 trace_seq_puts(p, str);
89 /* check for left over flags */
92 trace_seq_puts(p, delim);
93 trace_seq_printf(p, "0x%lx", flags);
100 EXPORT_SYMBOL(trace_print_flags_seq);
103 trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
104 const struct trace_print_flags *symbol_array)
107 const char *ret = trace_seq_buffer_ptr(p);
109 for (i = 0; symbol_array[i].name; i++) {
111 if (val != symbol_array[i].mask)
114 trace_seq_puts(p, symbol_array[i].name);
118 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
119 trace_seq_printf(p, "0x%lx", val);
121 trace_seq_putc(p, 0);
125 EXPORT_SYMBOL(trace_print_symbols_seq);
127 #if BITS_PER_LONG == 32
129 trace_print_flags_seq_u64(struct trace_seq *p, const char *delim,
130 unsigned long long flags,
131 const struct trace_print_flags_u64 *flag_array)
133 unsigned long long mask;
135 const char *ret = trace_seq_buffer_ptr(p);
138 for (i = 0; flag_array[i].name && flags; i++) {
140 mask = flag_array[i].mask;
141 if ((flags & mask) != mask)
144 str = flag_array[i].name;
147 trace_seq_puts(p, delim);
150 trace_seq_puts(p, str);
153 /* check for left over flags */
156 trace_seq_puts(p, delim);
157 trace_seq_printf(p, "0x%llx", flags);
160 trace_seq_putc(p, 0);
164 EXPORT_SYMBOL(trace_print_flags_seq_u64);
167 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
168 const struct trace_print_flags_u64 *symbol_array)
171 const char *ret = trace_seq_buffer_ptr(p);
173 for (i = 0; symbol_array[i].name; i++) {
175 if (val != symbol_array[i].mask)
178 trace_seq_puts(p, symbol_array[i].name);
182 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
183 trace_seq_printf(p, "0x%llx", val);
185 trace_seq_putc(p, 0);
189 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
193 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
194 unsigned int bitmask_size)
196 const char *ret = trace_seq_buffer_ptr(p);
198 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
199 trace_seq_putc(p, 0);
203 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
206 * trace_print_hex_seq - print buffer as hex sequence
207 * @p: trace seq struct to write to
208 * @buf: The buffer to print
209 * @buf_len: Length of @buf in bytes
210 * @concatenate: Print @buf as single hex string or with spacing
212 * Prints the passed buffer as a hex sequence either as a whole,
213 * single hex string if @concatenate is true or with spacing after
214 * each byte in case @concatenate is false.
217 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len,
221 const char *ret = trace_seq_buffer_ptr(p);
222 const char *fmt = concatenate ? "%*phN" : "%*ph";
224 for (i = 0; i < buf_len; i += 16)
225 trace_seq_printf(p, fmt, min(buf_len - i, 16), &buf[i]);
226 trace_seq_putc(p, 0);
230 EXPORT_SYMBOL(trace_print_hex_seq);
233 trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
236 const char *ret = trace_seq_buffer_ptr(p);
237 const char *prefix = "";
238 void *ptr = (void *)buf;
239 size_t buf_len = count * el_size;
241 trace_seq_putc(p, '{');
243 while (ptr < buf + buf_len) {
246 trace_seq_printf(p, "%s0x%x", prefix,
250 trace_seq_printf(p, "%s0x%x", prefix,
254 trace_seq_printf(p, "%s0x%x", prefix,
258 trace_seq_printf(p, "%s0x%llx", prefix,
262 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
270 trace_seq_putc(p, '}');
271 trace_seq_putc(p, 0);
275 EXPORT_SYMBOL(trace_print_array_seq);
278 trace_print_hex_dump_seq(struct trace_seq *p, const char *prefix_str,
279 int prefix_type, int rowsize, int groupsize,
280 const void *buf, size_t len, bool ascii)
282 const char *ret = trace_seq_buffer_ptr(p);
284 trace_seq_putc(p, '\n');
285 trace_seq_hex_dump(p, prefix_str, prefix_type,
286 rowsize, groupsize, buf, len, ascii);
287 trace_seq_putc(p, 0);
290 EXPORT_SYMBOL(trace_print_hex_dump_seq);
292 int trace_raw_output_prep(struct trace_iterator *iter,
293 struct trace_event *trace_event)
295 struct trace_event_call *event;
296 struct trace_seq *s = &iter->seq;
297 struct trace_seq *p = &iter->tmp_seq;
298 struct trace_entry *entry;
300 event = container_of(trace_event, struct trace_event_call, event);
303 if (entry->type != event->event.type) {
305 return TRACE_TYPE_UNHANDLED;
309 trace_seq_printf(s, "%s: ", trace_event_name(event));
311 return trace_handle_return(s);
313 EXPORT_SYMBOL(trace_raw_output_prep);
315 void trace_event_printf(struct trace_iterator *iter, const char *fmt, ...)
320 trace_check_vprintf(iter, trace_event_format(iter, fmt), ap);
323 EXPORT_SYMBOL(trace_event_printf);
325 static int trace_output_raw(struct trace_iterator *iter, char *name,
326 char *fmt, va_list ap)
328 struct trace_seq *s = &iter->seq;
330 trace_seq_printf(s, "%s: ", name);
331 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
333 return trace_handle_return(s);
336 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
342 ret = trace_output_raw(iter, name, fmt, ap);
347 EXPORT_SYMBOL_GPL(trace_output_call);
349 #ifdef CONFIG_KRETPROBES
350 static inline const char *kretprobed(const char *name)
352 static const char tramp_name[] = "kretprobe_trampoline";
353 int size = sizeof(tramp_name);
355 if (strncmp(tramp_name, name, size) == 0)
356 return "[unknown/kretprobe'd]";
360 static inline const char *kretprobed(const char *name)
364 #endif /* CONFIG_KRETPROBES */
367 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
369 #ifdef CONFIG_KALLSYMS
370 char str[KSYM_SYMBOL_LEN];
374 sprint_symbol(str, address);
376 kallsyms_lookup(address, NULL, NULL, NULL, str);
377 name = kretprobed(str);
379 if (name && strlen(name)) {
380 trace_seq_puts(s, name);
384 trace_seq_printf(s, "0x%08lx", address);
388 # define IP_FMT "%08lx"
390 # define IP_FMT "%016lx"
393 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
394 unsigned long ip, unsigned long sym_flags)
396 struct file *file = NULL;
397 unsigned long vmstart = 0;
404 const struct vm_area_struct *vma;
407 vma = find_vma(mm, ip);
410 vmstart = vma->vm_start;
413 ret = trace_seq_path(s, &file->f_path);
415 trace_seq_printf(s, "[+0x%lx]",
418 mmap_read_unlock(mm);
420 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
421 trace_seq_printf(s, " <" IP_FMT ">", ip);
422 return !trace_seq_has_overflowed(s);
426 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
429 trace_seq_putc(s, '0');
433 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
435 if (sym_flags & TRACE_ITER_SYM_ADDR)
436 trace_seq_printf(s, " <" IP_FMT ">", ip);
439 return !trace_seq_has_overflowed(s);
443 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
444 * @s: trace seq struct to write to
445 * @entry: The trace entry field from the ring buffer
447 * Prints the generic fields of irqs off, in hard or softirq, preempt
450 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
459 nmi = entry->flags & TRACE_FLAG_NMI;
460 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
461 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
464 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
465 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
468 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
469 TRACE_FLAG_PREEMPT_RESCHED)) {
470 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
473 case TRACE_FLAG_NEED_RESCHED:
476 case TRACE_FLAG_PREEMPT_RESCHED:
485 (nmi && hardirq) ? 'Z' :
487 (hardirq && softirq) ? 'H' :
492 trace_seq_printf(s, "%c%c%c",
493 irqs_off, need_resched, hardsoft_irq);
495 if (entry->preempt_count)
496 trace_seq_printf(s, "%x", entry->preempt_count);
498 trace_seq_putc(s, '.');
500 return !trace_seq_has_overflowed(s);
504 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
506 char comm[TASK_COMM_LEN];
508 trace_find_cmdline(entry->pid, comm);
510 trace_seq_printf(s, "%8.8s-%-7d %3d",
511 comm, entry->pid, cpu);
513 return trace_print_lat_fmt(s, entry);
517 #define MARK(v, s) {.val = v, .sym = s}
518 /* trace overhead mark */
519 static const struct trace_mark {
520 unsigned long long val; /* unit: nsec */
523 MARK(1000000000ULL , '$'), /* 1 sec */
524 MARK(100000000ULL , '@'), /* 100 msec */
525 MARK(10000000ULL , '*'), /* 10 msec */
526 MARK(1000000ULL , '#'), /* 1000 usecs */
527 MARK(100000ULL , '!'), /* 100 usecs */
528 MARK(10000ULL , '+'), /* 10 usecs */
532 char trace_find_mark(unsigned long long d)
535 int size = ARRAY_SIZE(mark);
537 for (i = 0; i < size; i++) {
542 return (i == size) ? ' ' : mark[i].sym;
546 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
548 struct trace_array *tr = iter->tr;
549 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
550 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
551 unsigned long long abs_ts = iter->ts - iter->array_buffer->time_start;
552 unsigned long long rel_ts = next_ts - iter->ts;
553 struct trace_seq *s = &iter->seq;
556 abs_ts = ns2usecs(abs_ts);
557 rel_ts = ns2usecs(rel_ts);
560 if (verbose && in_ns) {
561 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
562 unsigned long abs_msec = (unsigned long)abs_ts;
563 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
564 unsigned long rel_msec = (unsigned long)rel_ts;
567 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
572 } else if (verbose && !in_ns) {
574 s, "[%016llx] %lld (+%lld): ",
575 iter->ts, abs_ts, rel_ts);
577 } else if (!verbose && in_ns) {
581 trace_find_mark(rel_ts * NSEC_PER_USEC));
583 } else { /* !verbose && !in_ns */
584 trace_seq_printf(s, " %4lld: ", abs_ts);
587 return !trace_seq_has_overflowed(s);
590 static void trace_print_time(struct trace_seq *s, struct trace_iterator *iter,
591 unsigned long long ts)
593 unsigned long secs, usec_rem;
594 unsigned long long t;
596 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
598 usec_rem = do_div(t, USEC_PER_SEC);
599 secs = (unsigned long)t;
600 trace_seq_printf(s, " %5lu.%06lu", secs, usec_rem);
602 trace_seq_printf(s, " %12llu", ts);
605 int trace_print_context(struct trace_iterator *iter)
607 struct trace_array *tr = iter->tr;
608 struct trace_seq *s = &iter->seq;
609 struct trace_entry *entry = iter->ent;
610 char comm[TASK_COMM_LEN];
612 trace_find_cmdline(entry->pid, comm);
614 trace_seq_printf(s, "%16s-%-7d ", comm, entry->pid);
616 if (tr->trace_flags & TRACE_ITER_RECORD_TGID) {
617 unsigned int tgid = trace_find_tgid(entry->pid);
620 trace_seq_printf(s, "(-------) ");
622 trace_seq_printf(s, "(%7d) ", tgid);
625 trace_seq_printf(s, "[%03d] ", iter->cpu);
627 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
628 trace_print_lat_fmt(s, entry);
630 trace_print_time(s, iter, iter->ts);
631 trace_seq_puts(s, ": ");
633 return !trace_seq_has_overflowed(s);
636 int trace_print_lat_context(struct trace_iterator *iter)
638 struct trace_entry *entry, *next_entry;
639 struct trace_array *tr = iter->tr;
640 struct trace_seq *s = &iter->seq;
641 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
644 next_entry = trace_find_next_entry(iter, NULL, &next_ts);
648 /* trace_find_next_entry() may change iter->ent */
652 char comm[TASK_COMM_LEN];
654 trace_find_cmdline(entry->pid, comm);
657 s, "%16s %7d %3d %d %08x %08lx ",
658 comm, entry->pid, iter->cpu, entry->flags,
659 entry->preempt_count, iter->idx);
661 lat_print_generic(s, entry, iter->cpu);
664 lat_print_timestamp(iter, next_ts);
666 return !trace_seq_has_overflowed(s);
670 * ftrace_find_event - find a registered event
671 * @type: the type of event to look for
673 * Returns an event of type @type otherwise NULL
674 * Called with trace_event_read_lock() held.
676 struct trace_event *ftrace_find_event(int type)
678 struct trace_event *event;
681 key = type & (EVENT_HASHSIZE - 1);
683 hlist_for_each_entry(event, &event_hash[key], node) {
684 if (event->type == type)
691 static LIST_HEAD(ftrace_event_list);
693 static int trace_search_list(struct list_head **list)
695 struct trace_event *e;
696 int next = __TRACE_LAST_TYPE;
698 if (list_empty(&ftrace_event_list)) {
699 *list = &ftrace_event_list;
704 * We used up all possible max events,
705 * lets see if somebody freed one.
707 list_for_each_entry(e, &ftrace_event_list, list) {
713 /* Did we used up all 65 thousand events??? */
714 if (next > TRACE_EVENT_TYPE_MAX)
721 void trace_event_read_lock(void)
723 down_read(&trace_event_sem);
726 void trace_event_read_unlock(void)
728 up_read(&trace_event_sem);
732 * register_trace_event - register output for an event type
733 * @event: the event type to register
735 * Event types are stored in a hash and this hash is used to
736 * find a way to print an event. If the @event->type is set
737 * then it will use that type, otherwise it will assign a
740 * If you assign your own type, please make sure it is added
741 * to the trace_type enum in trace.h, to avoid collisions
742 * with the dynamic types.
744 * Returns the event type number or zero on error.
746 int register_trace_event(struct trace_event *event)
751 down_write(&trace_event_sem);
756 if (WARN_ON(!event->funcs))
759 INIT_LIST_HEAD(&event->list);
762 struct list_head *list = NULL;
764 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
766 event->type = trace_search_list(&list);
772 event->type = next_event_type++;
773 list = &ftrace_event_list;
776 if (WARN_ON(ftrace_find_event(event->type)))
779 list_add_tail(&event->list, list);
781 } else if (event->type > __TRACE_LAST_TYPE) {
782 printk(KERN_WARNING "Need to add type to trace.h\n");
786 /* Is this event already used */
787 if (ftrace_find_event(event->type))
791 if (event->funcs->trace == NULL)
792 event->funcs->trace = trace_nop_print;
793 if (event->funcs->raw == NULL)
794 event->funcs->raw = trace_nop_print;
795 if (event->funcs->hex == NULL)
796 event->funcs->hex = trace_nop_print;
797 if (event->funcs->binary == NULL)
798 event->funcs->binary = trace_nop_print;
800 key = event->type & (EVENT_HASHSIZE - 1);
802 hlist_add_head(&event->node, &event_hash[key]);
806 up_write(&trace_event_sem);
810 EXPORT_SYMBOL_GPL(register_trace_event);
813 * Used by module code with the trace_event_sem held for write.
815 int __unregister_trace_event(struct trace_event *event)
817 hlist_del(&event->node);
818 list_del(&event->list);
823 * unregister_trace_event - remove a no longer used event
824 * @event: the event to remove
826 int unregister_trace_event(struct trace_event *event)
828 down_write(&trace_event_sem);
829 __unregister_trace_event(event);
830 up_write(&trace_event_sem);
834 EXPORT_SYMBOL_GPL(unregister_trace_event);
840 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
841 struct trace_event *event)
843 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
845 return trace_handle_return(&iter->seq);
848 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
849 unsigned long parent_ip, int flags)
851 seq_print_ip_sym(s, ip, flags);
853 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
854 trace_seq_puts(s, " <-");
855 seq_print_ip_sym(s, parent_ip, flags);
860 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
861 struct trace_event *event)
863 struct ftrace_entry *field;
864 struct trace_seq *s = &iter->seq;
866 trace_assign_type(field, iter->ent);
868 print_fn_trace(s, field->ip, field->parent_ip, flags);
869 trace_seq_putc(s, '\n');
871 return trace_handle_return(s);
874 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
875 struct trace_event *event)
877 struct ftrace_entry *field;
879 trace_assign_type(field, iter->ent);
881 trace_seq_printf(&iter->seq, "%lx %lx\n",
885 return trace_handle_return(&iter->seq);
888 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
889 struct trace_event *event)
891 struct ftrace_entry *field;
892 struct trace_seq *s = &iter->seq;
894 trace_assign_type(field, iter->ent);
896 SEQ_PUT_HEX_FIELD(s, field->ip);
897 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
899 return trace_handle_return(s);
902 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
903 struct trace_event *event)
905 struct ftrace_entry *field;
906 struct trace_seq *s = &iter->seq;
908 trace_assign_type(field, iter->ent);
910 SEQ_PUT_FIELD(s, field->ip);
911 SEQ_PUT_FIELD(s, field->parent_ip);
913 return trace_handle_return(s);
916 static struct trace_event_functions trace_fn_funcs = {
917 .trace = trace_fn_trace,
920 .binary = trace_fn_bin,
923 static struct trace_event trace_fn_event = {
925 .funcs = &trace_fn_funcs,
928 /* TRACE_CTX an TRACE_WAKE */
929 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
932 struct ctx_switch_entry *field;
933 char comm[TASK_COMM_LEN];
937 trace_assign_type(field, iter->ent);
939 T = task_index_to_char(field->next_state);
940 S = task_index_to_char(field->prev_state);
941 trace_find_cmdline(field->next_pid, comm);
942 trace_seq_printf(&iter->seq,
943 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
952 return trace_handle_return(&iter->seq);
955 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
956 struct trace_event *event)
958 return trace_ctxwake_print(iter, "==>");
961 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
962 int flags, struct trace_event *event)
964 return trace_ctxwake_print(iter, " +");
967 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
969 struct ctx_switch_entry *field;
972 trace_assign_type(field, iter->ent);
975 S = task_index_to_char(field->prev_state);
976 T = task_index_to_char(field->next_state);
977 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
986 return trace_handle_return(&iter->seq);
989 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
990 struct trace_event *event)
992 return trace_ctxwake_raw(iter, 0);
995 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
996 struct trace_event *event)
998 return trace_ctxwake_raw(iter, '+');
1002 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1004 struct ctx_switch_entry *field;
1005 struct trace_seq *s = &iter->seq;
1008 trace_assign_type(field, iter->ent);
1011 S = task_index_to_char(field->prev_state);
1012 T = task_index_to_char(field->next_state);
1014 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1015 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1016 SEQ_PUT_HEX_FIELD(s, S);
1017 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1018 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1019 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1020 SEQ_PUT_HEX_FIELD(s, T);
1022 return trace_handle_return(s);
1025 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1026 struct trace_event *event)
1028 return trace_ctxwake_hex(iter, 0);
1031 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1032 struct trace_event *event)
1034 return trace_ctxwake_hex(iter, '+');
1037 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1038 int flags, struct trace_event *event)
1040 struct ctx_switch_entry *field;
1041 struct trace_seq *s = &iter->seq;
1043 trace_assign_type(field, iter->ent);
1045 SEQ_PUT_FIELD(s, field->prev_pid);
1046 SEQ_PUT_FIELD(s, field->prev_prio);
1047 SEQ_PUT_FIELD(s, field->prev_state);
1048 SEQ_PUT_FIELD(s, field->next_cpu);
1049 SEQ_PUT_FIELD(s, field->next_pid);
1050 SEQ_PUT_FIELD(s, field->next_prio);
1051 SEQ_PUT_FIELD(s, field->next_state);
1053 return trace_handle_return(s);
1056 static struct trace_event_functions trace_ctx_funcs = {
1057 .trace = trace_ctx_print,
1058 .raw = trace_ctx_raw,
1059 .hex = trace_ctx_hex,
1060 .binary = trace_ctxwake_bin,
1063 static struct trace_event trace_ctx_event = {
1065 .funcs = &trace_ctx_funcs,
1068 static struct trace_event_functions trace_wake_funcs = {
1069 .trace = trace_wake_print,
1070 .raw = trace_wake_raw,
1071 .hex = trace_wake_hex,
1072 .binary = trace_ctxwake_bin,
1075 static struct trace_event trace_wake_event = {
1077 .funcs = &trace_wake_funcs,
1082 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1083 int flags, struct trace_event *event)
1085 struct stack_entry *field;
1086 struct trace_seq *s = &iter->seq;
1090 trace_assign_type(field, iter->ent);
1091 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1093 trace_seq_puts(s, "<stack trace>\n");
1095 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1097 if (trace_seq_has_overflowed(s))
1100 trace_seq_puts(s, " => ");
1101 seq_print_ip_sym(s, *p, flags);
1102 trace_seq_putc(s, '\n');
1105 return trace_handle_return(s);
1108 static struct trace_event_functions trace_stack_funcs = {
1109 .trace = trace_stack_print,
1112 static struct trace_event trace_stack_event = {
1113 .type = TRACE_STACK,
1114 .funcs = &trace_stack_funcs,
1117 /* TRACE_USER_STACK */
1118 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1119 int flags, struct trace_event *event)
1121 struct trace_array *tr = iter->tr;
1122 struct userstack_entry *field;
1123 struct trace_seq *s = &iter->seq;
1124 struct mm_struct *mm = NULL;
1127 trace_assign_type(field, iter->ent);
1129 trace_seq_puts(s, "<user stack trace>\n");
1131 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1132 struct task_struct *task;
1134 * we do the lookup on the thread group leader,
1135 * since individual threads might have already quit!
1138 task = find_task_by_vpid(field->tgid);
1140 mm = get_task_mm(task);
1144 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1145 unsigned long ip = field->caller[i];
1147 if (!ip || trace_seq_has_overflowed(s))
1150 trace_seq_puts(s, " => ");
1151 seq_print_user_ip(s, mm, ip, flags);
1152 trace_seq_putc(s, '\n');
1158 return trace_handle_return(s);
1161 static struct trace_event_functions trace_user_stack_funcs = {
1162 .trace = trace_user_stack_print,
1165 static struct trace_event trace_user_stack_event = {
1166 .type = TRACE_USER_STACK,
1167 .funcs = &trace_user_stack_funcs,
1171 static enum print_line_t
1172 trace_hwlat_print(struct trace_iterator *iter, int flags,
1173 struct trace_event *event)
1175 struct trace_entry *entry = iter->ent;
1176 struct trace_seq *s = &iter->seq;
1177 struct hwlat_entry *field;
1179 trace_assign_type(field, entry);
1181 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1184 field->outer_duration,
1185 (long long)field->timestamp.tv_sec,
1186 field->timestamp.tv_nsec, field->count);
1188 if (field->nmi_count) {
1190 * The generic sched_clock() is not NMI safe, thus
1191 * we only record the count and not the time.
1193 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1194 trace_seq_printf(s, " nmi-total:%llu",
1195 field->nmi_total_ts);
1196 trace_seq_printf(s, " nmi-count:%u",
1200 trace_seq_putc(s, '\n');
1202 return trace_handle_return(s);
1206 static enum print_line_t
1207 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1208 struct trace_event *event)
1210 struct hwlat_entry *field;
1211 struct trace_seq *s = &iter->seq;
1213 trace_assign_type(field, iter->ent);
1215 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1217 field->outer_duration,
1218 (long long)field->timestamp.tv_sec,
1219 field->timestamp.tv_nsec,
1222 return trace_handle_return(s);
1225 static struct trace_event_functions trace_hwlat_funcs = {
1226 .trace = trace_hwlat_print,
1227 .raw = trace_hwlat_raw,
1230 static struct trace_event trace_hwlat_event = {
1231 .type = TRACE_HWLAT,
1232 .funcs = &trace_hwlat_funcs,
1236 static enum print_line_t
1237 trace_bputs_print(struct trace_iterator *iter, int flags,
1238 struct trace_event *event)
1240 struct trace_entry *entry = iter->ent;
1241 struct trace_seq *s = &iter->seq;
1242 struct bputs_entry *field;
1244 trace_assign_type(field, entry);
1246 seq_print_ip_sym(s, field->ip, flags);
1247 trace_seq_puts(s, ": ");
1248 trace_seq_puts(s, field->str);
1250 return trace_handle_return(s);
1254 static enum print_line_t
1255 trace_bputs_raw(struct trace_iterator *iter, int flags,
1256 struct trace_event *event)
1258 struct bputs_entry *field;
1259 struct trace_seq *s = &iter->seq;
1261 trace_assign_type(field, iter->ent);
1263 trace_seq_printf(s, ": %lx : ", field->ip);
1264 trace_seq_puts(s, field->str);
1266 return trace_handle_return(s);
1269 static struct trace_event_functions trace_bputs_funcs = {
1270 .trace = trace_bputs_print,
1271 .raw = trace_bputs_raw,
1274 static struct trace_event trace_bputs_event = {
1275 .type = TRACE_BPUTS,
1276 .funcs = &trace_bputs_funcs,
1280 static enum print_line_t
1281 trace_bprint_print(struct trace_iterator *iter, int flags,
1282 struct trace_event *event)
1284 struct trace_entry *entry = iter->ent;
1285 struct trace_seq *s = &iter->seq;
1286 struct bprint_entry *field;
1288 trace_assign_type(field, entry);
1290 seq_print_ip_sym(s, field->ip, flags);
1291 trace_seq_puts(s, ": ");
1292 trace_seq_bprintf(s, field->fmt, field->buf);
1294 return trace_handle_return(s);
1298 static enum print_line_t
1299 trace_bprint_raw(struct trace_iterator *iter, int flags,
1300 struct trace_event *event)
1302 struct bprint_entry *field;
1303 struct trace_seq *s = &iter->seq;
1305 trace_assign_type(field, iter->ent);
1307 trace_seq_printf(s, ": %lx : ", field->ip);
1308 trace_seq_bprintf(s, field->fmt, field->buf);
1310 return trace_handle_return(s);
1313 static struct trace_event_functions trace_bprint_funcs = {
1314 .trace = trace_bprint_print,
1315 .raw = trace_bprint_raw,
1318 static struct trace_event trace_bprint_event = {
1319 .type = TRACE_BPRINT,
1320 .funcs = &trace_bprint_funcs,
1324 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1325 int flags, struct trace_event *event)
1327 struct print_entry *field;
1328 struct trace_seq *s = &iter->seq;
1330 trace_assign_type(field, iter->ent);
1332 seq_print_ip_sym(s, field->ip, flags);
1333 trace_seq_printf(s, ": %s", field->buf);
1335 return trace_handle_return(s);
1338 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1339 struct trace_event *event)
1341 struct print_entry *field;
1343 trace_assign_type(field, iter->ent);
1345 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1347 return trace_handle_return(&iter->seq);
1350 static struct trace_event_functions trace_print_funcs = {
1351 .trace = trace_print_print,
1352 .raw = trace_print_raw,
1355 static struct trace_event trace_print_event = {
1356 .type = TRACE_PRINT,
1357 .funcs = &trace_print_funcs,
1360 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1361 struct trace_event *event)
1363 struct raw_data_entry *field;
1366 trace_assign_type(field, iter->ent);
1368 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1370 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1371 trace_seq_printf(&iter->seq, " %02x",
1372 (unsigned char)field->buf[i]);
1374 trace_seq_putc(&iter->seq, '\n');
1376 return trace_handle_return(&iter->seq);
1379 static struct trace_event_functions trace_raw_data_funcs = {
1380 .trace = trace_raw_data,
1381 .raw = trace_raw_data,
1384 static struct trace_event trace_raw_data_event = {
1385 .type = TRACE_RAW_DATA,
1386 .funcs = &trace_raw_data_funcs,
1389 static enum print_line_t
1390 trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1391 struct trace_event *event)
1393 struct func_repeats_entry *field;
1394 struct trace_seq *s = &iter->seq;
1396 trace_assign_type(field, iter->ent);
1398 trace_seq_printf(s, "%lu %lu %u %llu\n",
1402 FUNC_REPEATS_GET_DELTA_TS(field));
1404 return trace_handle_return(s);
1407 static enum print_line_t
1408 trace_func_repeats_print(struct trace_iterator *iter, int flags,
1409 struct trace_event *event)
1411 struct func_repeats_entry *field;
1412 struct trace_seq *s = &iter->seq;
1414 trace_assign_type(field, iter->ent);
1416 print_fn_trace(s, field->ip, field->parent_ip, flags);
1417 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1418 trace_print_time(s, iter,
1419 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1420 trace_seq_puts(s, ")\n");
1422 return trace_handle_return(s);
1425 static struct trace_event_functions trace_func_repeats_funcs = {
1426 .trace = trace_func_repeats_print,
1427 .raw = trace_func_repeats_raw,
1430 static struct trace_event trace_func_repeats_event = {
1431 .type = TRACE_FUNC_REPEATS,
1432 .funcs = &trace_func_repeats_funcs,
1435 static struct trace_event *events[] __initdata = {
1440 &trace_user_stack_event,
1442 &trace_bprint_event,
1445 &trace_raw_data_event,
1446 &trace_func_repeats_event,
1450 __init static int init_events(void)
1452 struct trace_event *event;
1455 for (i = 0; events[i]; i++) {
1458 ret = register_trace_event(event);
1460 printk(KERN_WARNING "event %d failed to register\n",
1468 early_initcall(init_events);