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/kprobes.h>
12 #include <linux/sched/clock.h>
13 #include <linux/sched/mm.h>
14 #include <linux/idr.h>
16 #include "trace_output.h"
18 /* must be a power of 2 */
19 #define EVENT_HASHSIZE 128
21 DECLARE_RWSEM(trace_event_sem);
23 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
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 __printf(3, 0)
326 int trace_output_raw(struct trace_iterator *iter, char *name,
327 char *fmt, va_list ap)
329 struct trace_seq *s = &iter->seq;
331 trace_seq_printf(s, "%s: ", name);
332 trace_seq_vprintf(s, trace_event_format(iter, fmt), ap);
334 return trace_handle_return(s);
337 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
343 ret = trace_output_raw(iter, name, fmt, ap);
348 EXPORT_SYMBOL_GPL(trace_output_call);
350 static inline const char *kretprobed(const char *name, unsigned long addr)
352 if (is_kretprobe_trampoline(addr))
353 return "[unknown/kretprobe'd]";
358 trace_seq_print_sym(struct trace_seq *s, unsigned long address, bool offset)
360 #ifdef CONFIG_KALLSYMS
361 char str[KSYM_SYMBOL_LEN];
365 sprint_symbol(str, address);
367 kallsyms_lookup(address, NULL, NULL, NULL, str);
368 name = kretprobed(str, address);
370 if (name && strlen(name)) {
371 trace_seq_puts(s, name);
375 trace_seq_printf(s, "0x%08lx", address);
379 # define IP_FMT "%08lx"
381 # define IP_FMT "%016lx"
384 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
385 unsigned long ip, unsigned long sym_flags)
387 struct file *file = NULL;
388 unsigned long vmstart = 0;
395 const struct vm_area_struct *vma;
398 vma = find_vma(mm, ip);
401 vmstart = vma->vm_start;
404 ret = trace_seq_path(s, &file->f_path);
406 trace_seq_printf(s, "[+0x%lx]",
409 mmap_read_unlock(mm);
411 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
412 trace_seq_printf(s, " <" IP_FMT ">", ip);
413 return !trace_seq_has_overflowed(s);
417 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
420 trace_seq_putc(s, '0');
424 trace_seq_print_sym(s, ip, sym_flags & TRACE_ITER_SYM_OFFSET);
426 if (sym_flags & TRACE_ITER_SYM_ADDR)
427 trace_seq_printf(s, " <" IP_FMT ">", ip);
430 return !trace_seq_has_overflowed(s);
434 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
435 * @s: trace seq struct to write to
436 * @entry: The trace entry field from the ring buffer
438 * Prints the generic fields of irqs off, in hard or softirq, preempt
441 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
451 nmi = entry->flags & TRACE_FLAG_NMI;
452 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
453 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
454 bh_off = entry->flags & TRACE_FLAG_BH_OFF;
457 (entry->flags & TRACE_FLAG_IRQS_OFF && bh_off) ? 'D' :
458 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
460 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
463 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
464 TRACE_FLAG_PREEMPT_RESCHED)) {
465 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
468 case TRACE_FLAG_NEED_RESCHED:
471 case TRACE_FLAG_PREEMPT_RESCHED:
480 (nmi && hardirq) ? 'Z' :
482 (hardirq && softirq) ? 'H' :
487 trace_seq_printf(s, "%c%c%c",
488 irqs_off, need_resched, hardsoft_irq);
490 if (entry->preempt_count & 0xf)
491 trace_seq_printf(s, "%x", entry->preempt_count & 0xf);
493 trace_seq_putc(s, '.');
495 if (entry->preempt_count & 0xf0)
496 trace_seq_printf(s, "%x", entry->preempt_count >> 4);
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 & 0xf, 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 DEFINE_IDA(trace_event_ida);
693 static void free_trace_event_type(int type)
695 if (type >= __TRACE_LAST_TYPE)
696 ida_free(&trace_event_ida, type);
699 static int alloc_trace_event_type(void)
703 /* Skip static defined type numbers */
704 next = ida_alloc_range(&trace_event_ida, __TRACE_LAST_TYPE,
705 TRACE_EVENT_TYPE_MAX, GFP_KERNEL);
711 void trace_event_read_lock(void)
713 down_read(&trace_event_sem);
716 void trace_event_read_unlock(void)
718 up_read(&trace_event_sem);
722 * register_trace_event - register output for an event type
723 * @event: the event type to register
725 * Event types are stored in a hash and this hash is used to
726 * find a way to print an event. If the @event->type is set
727 * then it will use that type, otherwise it will assign a
730 * If you assign your own type, please make sure it is added
731 * to the trace_type enum in trace.h, to avoid collisions
732 * with the dynamic types.
734 * Returns the event type number or zero on error.
736 int register_trace_event(struct trace_event *event)
741 down_write(&trace_event_sem);
746 if (WARN_ON(!event->funcs))
750 event->type = alloc_trace_event_type();
753 } else if (WARN(event->type > __TRACE_LAST_TYPE,
754 "Need to add type to trace.h")) {
757 /* Is this event already used */
758 if (ftrace_find_event(event->type))
762 if (event->funcs->trace == NULL)
763 event->funcs->trace = trace_nop_print;
764 if (event->funcs->raw == NULL)
765 event->funcs->raw = trace_nop_print;
766 if (event->funcs->hex == NULL)
767 event->funcs->hex = trace_nop_print;
768 if (event->funcs->binary == NULL)
769 event->funcs->binary = trace_nop_print;
771 key = event->type & (EVENT_HASHSIZE - 1);
773 hlist_add_head(&event->node, &event_hash[key]);
777 up_write(&trace_event_sem);
781 EXPORT_SYMBOL_GPL(register_trace_event);
784 * Used by module code with the trace_event_sem held for write.
786 int __unregister_trace_event(struct trace_event *event)
788 hlist_del(&event->node);
789 free_trace_event_type(event->type);
794 * unregister_trace_event - remove a no longer used event
795 * @event: the event to remove
797 int unregister_trace_event(struct trace_event *event)
799 down_write(&trace_event_sem);
800 __unregister_trace_event(event);
801 up_write(&trace_event_sem);
805 EXPORT_SYMBOL_GPL(unregister_trace_event);
811 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
812 struct trace_event *event)
814 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
816 return trace_handle_return(&iter->seq);
819 static void print_fn_trace(struct trace_seq *s, unsigned long ip,
820 unsigned long parent_ip, int flags)
822 seq_print_ip_sym(s, ip, flags);
824 if ((flags & TRACE_ITER_PRINT_PARENT) && parent_ip) {
825 trace_seq_puts(s, " <-");
826 seq_print_ip_sym(s, parent_ip, flags);
831 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
832 struct trace_event *event)
834 struct ftrace_entry *field;
835 struct trace_seq *s = &iter->seq;
837 trace_assign_type(field, iter->ent);
839 print_fn_trace(s, field->ip, field->parent_ip, flags);
840 trace_seq_putc(s, '\n');
842 return trace_handle_return(s);
845 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
846 struct trace_event *event)
848 struct ftrace_entry *field;
850 trace_assign_type(field, iter->ent);
852 trace_seq_printf(&iter->seq, "%lx %lx\n",
856 return trace_handle_return(&iter->seq);
859 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
860 struct trace_event *event)
862 struct ftrace_entry *field;
863 struct trace_seq *s = &iter->seq;
865 trace_assign_type(field, iter->ent);
867 SEQ_PUT_HEX_FIELD(s, field->ip);
868 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
870 return trace_handle_return(s);
873 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
874 struct trace_event *event)
876 struct ftrace_entry *field;
877 struct trace_seq *s = &iter->seq;
879 trace_assign_type(field, iter->ent);
881 SEQ_PUT_FIELD(s, field->ip);
882 SEQ_PUT_FIELD(s, field->parent_ip);
884 return trace_handle_return(s);
887 static struct trace_event_functions trace_fn_funcs = {
888 .trace = trace_fn_trace,
891 .binary = trace_fn_bin,
894 static struct trace_event trace_fn_event = {
896 .funcs = &trace_fn_funcs,
899 /* TRACE_CTX an TRACE_WAKE */
900 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
903 struct ctx_switch_entry *field;
904 char comm[TASK_COMM_LEN];
908 trace_assign_type(field, iter->ent);
910 T = task_index_to_char(field->next_state);
911 S = task_index_to_char(field->prev_state);
912 trace_find_cmdline(field->next_pid, comm);
913 trace_seq_printf(&iter->seq,
914 " %7d:%3d:%c %s [%03d] %7d:%3d:%c %s\n",
923 return trace_handle_return(&iter->seq);
926 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
927 struct trace_event *event)
929 return trace_ctxwake_print(iter, "==>");
932 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
933 int flags, struct trace_event *event)
935 return trace_ctxwake_print(iter, " +");
938 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
940 struct ctx_switch_entry *field;
943 trace_assign_type(field, iter->ent);
946 S = task_index_to_char(field->prev_state);
947 T = task_index_to_char(field->next_state);
948 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
957 return trace_handle_return(&iter->seq);
960 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
961 struct trace_event *event)
963 return trace_ctxwake_raw(iter, 0);
966 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
967 struct trace_event *event)
969 return trace_ctxwake_raw(iter, '+');
973 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
975 struct ctx_switch_entry *field;
976 struct trace_seq *s = &iter->seq;
979 trace_assign_type(field, iter->ent);
982 S = task_index_to_char(field->prev_state);
983 T = task_index_to_char(field->next_state);
985 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
986 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
987 SEQ_PUT_HEX_FIELD(s, S);
988 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
989 SEQ_PUT_HEX_FIELD(s, field->next_pid);
990 SEQ_PUT_HEX_FIELD(s, field->next_prio);
991 SEQ_PUT_HEX_FIELD(s, T);
993 return trace_handle_return(s);
996 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
997 struct trace_event *event)
999 return trace_ctxwake_hex(iter, 0);
1002 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1003 struct trace_event *event)
1005 return trace_ctxwake_hex(iter, '+');
1008 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1009 int flags, struct trace_event *event)
1011 struct ctx_switch_entry *field;
1012 struct trace_seq *s = &iter->seq;
1014 trace_assign_type(field, iter->ent);
1016 SEQ_PUT_FIELD(s, field->prev_pid);
1017 SEQ_PUT_FIELD(s, field->prev_prio);
1018 SEQ_PUT_FIELD(s, field->prev_state);
1019 SEQ_PUT_FIELD(s, field->next_cpu);
1020 SEQ_PUT_FIELD(s, field->next_pid);
1021 SEQ_PUT_FIELD(s, field->next_prio);
1022 SEQ_PUT_FIELD(s, field->next_state);
1024 return trace_handle_return(s);
1027 static struct trace_event_functions trace_ctx_funcs = {
1028 .trace = trace_ctx_print,
1029 .raw = trace_ctx_raw,
1030 .hex = trace_ctx_hex,
1031 .binary = trace_ctxwake_bin,
1034 static struct trace_event trace_ctx_event = {
1036 .funcs = &trace_ctx_funcs,
1039 static struct trace_event_functions trace_wake_funcs = {
1040 .trace = trace_wake_print,
1041 .raw = trace_wake_raw,
1042 .hex = trace_wake_hex,
1043 .binary = trace_ctxwake_bin,
1046 static struct trace_event trace_wake_event = {
1048 .funcs = &trace_wake_funcs,
1053 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1054 int flags, struct trace_event *event)
1056 struct stack_entry *field;
1057 struct trace_seq *s = &iter->seq;
1061 trace_assign_type(field, iter->ent);
1062 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1064 trace_seq_puts(s, "<stack trace>\n");
1066 for (p = field->caller; p && p < end && *p != ULONG_MAX; p++) {
1068 if (trace_seq_has_overflowed(s))
1071 trace_seq_puts(s, " => ");
1072 seq_print_ip_sym(s, *p, flags);
1073 trace_seq_putc(s, '\n');
1076 return trace_handle_return(s);
1079 static struct trace_event_functions trace_stack_funcs = {
1080 .trace = trace_stack_print,
1083 static struct trace_event trace_stack_event = {
1084 .type = TRACE_STACK,
1085 .funcs = &trace_stack_funcs,
1088 /* TRACE_USER_STACK */
1089 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1090 int flags, struct trace_event *event)
1092 struct trace_array *tr = iter->tr;
1093 struct userstack_entry *field;
1094 struct trace_seq *s = &iter->seq;
1095 struct mm_struct *mm = NULL;
1098 trace_assign_type(field, iter->ent);
1100 trace_seq_puts(s, "<user stack trace>\n");
1102 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1103 struct task_struct *task;
1105 * we do the lookup on the thread group leader,
1106 * since individual threads might have already quit!
1109 task = find_task_by_vpid(field->tgid);
1111 mm = get_task_mm(task);
1115 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1116 unsigned long ip = field->caller[i];
1118 if (!ip || trace_seq_has_overflowed(s))
1121 trace_seq_puts(s, " => ");
1122 seq_print_user_ip(s, mm, ip, flags);
1123 trace_seq_putc(s, '\n');
1129 return trace_handle_return(s);
1132 static struct trace_event_functions trace_user_stack_funcs = {
1133 .trace = trace_user_stack_print,
1136 static struct trace_event trace_user_stack_event = {
1137 .type = TRACE_USER_STACK,
1138 .funcs = &trace_user_stack_funcs,
1142 static enum print_line_t
1143 trace_hwlat_print(struct trace_iterator *iter, int flags,
1144 struct trace_event *event)
1146 struct trace_entry *entry = iter->ent;
1147 struct trace_seq *s = &iter->seq;
1148 struct hwlat_entry *field;
1150 trace_assign_type(field, entry);
1152 trace_seq_printf(s, "#%-5u inner/outer(us): %4llu/%-5llu ts:%lld.%09ld count:%d",
1155 field->outer_duration,
1156 (long long)field->timestamp.tv_sec,
1157 field->timestamp.tv_nsec, field->count);
1159 if (field->nmi_count) {
1161 * The generic sched_clock() is not NMI safe, thus
1162 * we only record the count and not the time.
1164 if (!IS_ENABLED(CONFIG_GENERIC_SCHED_CLOCK))
1165 trace_seq_printf(s, " nmi-total:%llu",
1166 field->nmi_total_ts);
1167 trace_seq_printf(s, " nmi-count:%u",
1171 trace_seq_putc(s, '\n');
1173 return trace_handle_return(s);
1176 static enum print_line_t
1177 trace_hwlat_raw(struct trace_iterator *iter, int flags,
1178 struct trace_event *event)
1180 struct hwlat_entry *field;
1181 struct trace_seq *s = &iter->seq;
1183 trace_assign_type(field, iter->ent);
1185 trace_seq_printf(s, "%llu %lld %lld %09ld %u\n",
1187 field->outer_duration,
1188 (long long)field->timestamp.tv_sec,
1189 field->timestamp.tv_nsec,
1192 return trace_handle_return(s);
1195 static struct trace_event_functions trace_hwlat_funcs = {
1196 .trace = trace_hwlat_print,
1197 .raw = trace_hwlat_raw,
1200 static struct trace_event trace_hwlat_event = {
1201 .type = TRACE_HWLAT,
1202 .funcs = &trace_hwlat_funcs,
1206 static enum print_line_t
1207 trace_osnoise_print(struct trace_iterator *iter, int flags,
1208 struct trace_event *event)
1210 struct trace_entry *entry = iter->ent;
1211 struct trace_seq *s = &iter->seq;
1212 struct osnoise_entry *field;
1213 u64 ratio, ratio_dec;
1216 trace_assign_type(field, entry);
1219 * compute the available % of cpu time.
1221 net_runtime = field->runtime - field->noise;
1222 ratio = net_runtime * 10000000;
1223 do_div(ratio, field->runtime);
1224 ratio_dec = do_div(ratio, 100000);
1226 trace_seq_printf(s, "%llu %10llu %3llu.%05llu %7llu",
1232 trace_seq_printf(s, " %6u", field->hw_count);
1233 trace_seq_printf(s, " %6u", field->nmi_count);
1234 trace_seq_printf(s, " %6u", field->irq_count);
1235 trace_seq_printf(s, " %6u", field->softirq_count);
1236 trace_seq_printf(s, " %6u", field->thread_count);
1238 trace_seq_putc(s, '\n');
1240 return trace_handle_return(s);
1243 static enum print_line_t
1244 trace_osnoise_raw(struct trace_iterator *iter, int flags,
1245 struct trace_event *event)
1247 struct osnoise_entry *field;
1248 struct trace_seq *s = &iter->seq;
1250 trace_assign_type(field, iter->ent);
1252 trace_seq_printf(s, "%lld %llu %llu %u %u %u %u %u\n",
1259 field->softirq_count,
1260 field->thread_count);
1262 return trace_handle_return(s);
1265 static struct trace_event_functions trace_osnoise_funcs = {
1266 .trace = trace_osnoise_print,
1267 .raw = trace_osnoise_raw,
1270 static struct trace_event trace_osnoise_event = {
1271 .type = TRACE_OSNOISE,
1272 .funcs = &trace_osnoise_funcs,
1275 /* TRACE_TIMERLAT */
1276 static enum print_line_t
1277 trace_timerlat_print(struct trace_iterator *iter, int flags,
1278 struct trace_event *event)
1280 struct trace_entry *entry = iter->ent;
1281 struct trace_seq *s = &iter->seq;
1282 struct timerlat_entry *field;
1284 trace_assign_type(field, entry);
1286 trace_seq_printf(s, "#%-5u context %6s timer_latency %9llu ns\n",
1288 field->context ? "thread" : "irq",
1289 field->timer_latency);
1291 return trace_handle_return(s);
1294 static enum print_line_t
1295 trace_timerlat_raw(struct trace_iterator *iter, int flags,
1296 struct trace_event *event)
1298 struct timerlat_entry *field;
1299 struct trace_seq *s = &iter->seq;
1301 trace_assign_type(field, iter->ent);
1303 trace_seq_printf(s, "%u %d %llu\n",
1306 field->timer_latency);
1308 return trace_handle_return(s);
1311 static struct trace_event_functions trace_timerlat_funcs = {
1312 .trace = trace_timerlat_print,
1313 .raw = trace_timerlat_raw,
1316 static struct trace_event trace_timerlat_event = {
1317 .type = TRACE_TIMERLAT,
1318 .funcs = &trace_timerlat_funcs,
1322 static enum print_line_t
1323 trace_bputs_print(struct trace_iterator *iter, int flags,
1324 struct trace_event *event)
1326 struct trace_entry *entry = iter->ent;
1327 struct trace_seq *s = &iter->seq;
1328 struct bputs_entry *field;
1330 trace_assign_type(field, entry);
1332 seq_print_ip_sym(s, field->ip, flags);
1333 trace_seq_puts(s, ": ");
1334 trace_seq_puts(s, field->str);
1336 return trace_handle_return(s);
1340 static enum print_line_t
1341 trace_bputs_raw(struct trace_iterator *iter, int flags,
1342 struct trace_event *event)
1344 struct bputs_entry *field;
1345 struct trace_seq *s = &iter->seq;
1347 trace_assign_type(field, iter->ent);
1349 trace_seq_printf(s, ": %lx : ", field->ip);
1350 trace_seq_puts(s, field->str);
1352 return trace_handle_return(s);
1355 static struct trace_event_functions trace_bputs_funcs = {
1356 .trace = trace_bputs_print,
1357 .raw = trace_bputs_raw,
1360 static struct trace_event trace_bputs_event = {
1361 .type = TRACE_BPUTS,
1362 .funcs = &trace_bputs_funcs,
1366 static enum print_line_t
1367 trace_bprint_print(struct trace_iterator *iter, int flags,
1368 struct trace_event *event)
1370 struct trace_entry *entry = iter->ent;
1371 struct trace_seq *s = &iter->seq;
1372 struct bprint_entry *field;
1374 trace_assign_type(field, entry);
1376 seq_print_ip_sym(s, field->ip, flags);
1377 trace_seq_puts(s, ": ");
1378 trace_seq_bprintf(s, field->fmt, field->buf);
1380 return trace_handle_return(s);
1384 static enum print_line_t
1385 trace_bprint_raw(struct trace_iterator *iter, int flags,
1386 struct trace_event *event)
1388 struct bprint_entry *field;
1389 struct trace_seq *s = &iter->seq;
1391 trace_assign_type(field, iter->ent);
1393 trace_seq_printf(s, ": %lx : ", field->ip);
1394 trace_seq_bprintf(s, field->fmt, field->buf);
1396 return trace_handle_return(s);
1399 static struct trace_event_functions trace_bprint_funcs = {
1400 .trace = trace_bprint_print,
1401 .raw = trace_bprint_raw,
1404 static struct trace_event trace_bprint_event = {
1405 .type = TRACE_BPRINT,
1406 .funcs = &trace_bprint_funcs,
1410 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1411 int flags, struct trace_event *event)
1413 struct print_entry *field;
1414 struct trace_seq *s = &iter->seq;
1416 trace_assign_type(field, iter->ent);
1418 seq_print_ip_sym(s, field->ip, flags);
1419 trace_seq_printf(s, ": %s", field->buf);
1421 return trace_handle_return(s);
1424 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1425 struct trace_event *event)
1427 struct print_entry *field;
1429 trace_assign_type(field, iter->ent);
1431 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1433 return trace_handle_return(&iter->seq);
1436 static struct trace_event_functions trace_print_funcs = {
1437 .trace = trace_print_print,
1438 .raw = trace_print_raw,
1441 static struct trace_event trace_print_event = {
1442 .type = TRACE_PRINT,
1443 .funcs = &trace_print_funcs,
1446 static enum print_line_t trace_raw_data(struct trace_iterator *iter, int flags,
1447 struct trace_event *event)
1449 struct raw_data_entry *field;
1452 trace_assign_type(field, iter->ent);
1454 trace_seq_printf(&iter->seq, "# %x buf:", field->id);
1456 for (i = 0; i < iter->ent_size - offsetof(struct raw_data_entry, buf); i++)
1457 trace_seq_printf(&iter->seq, " %02x",
1458 (unsigned char)field->buf[i]);
1460 trace_seq_putc(&iter->seq, '\n');
1462 return trace_handle_return(&iter->seq);
1465 static struct trace_event_functions trace_raw_data_funcs = {
1466 .trace = trace_raw_data,
1467 .raw = trace_raw_data,
1470 static struct trace_event trace_raw_data_event = {
1471 .type = TRACE_RAW_DATA,
1472 .funcs = &trace_raw_data_funcs,
1475 static enum print_line_t
1476 trace_func_repeats_raw(struct trace_iterator *iter, int flags,
1477 struct trace_event *event)
1479 struct func_repeats_entry *field;
1480 struct trace_seq *s = &iter->seq;
1482 trace_assign_type(field, iter->ent);
1484 trace_seq_printf(s, "%lu %lu %u %llu\n",
1488 FUNC_REPEATS_GET_DELTA_TS(field));
1490 return trace_handle_return(s);
1493 static enum print_line_t
1494 trace_func_repeats_print(struct trace_iterator *iter, int flags,
1495 struct trace_event *event)
1497 struct func_repeats_entry *field;
1498 struct trace_seq *s = &iter->seq;
1500 trace_assign_type(field, iter->ent);
1502 print_fn_trace(s, field->ip, field->parent_ip, flags);
1503 trace_seq_printf(s, " (repeats: %u, last_ts:", field->count);
1504 trace_print_time(s, iter,
1505 iter->ts - FUNC_REPEATS_GET_DELTA_TS(field));
1506 trace_seq_puts(s, ")\n");
1508 return trace_handle_return(s);
1511 static struct trace_event_functions trace_func_repeats_funcs = {
1512 .trace = trace_func_repeats_print,
1513 .raw = trace_func_repeats_raw,
1516 static struct trace_event trace_func_repeats_event = {
1517 .type = TRACE_FUNC_REPEATS,
1518 .funcs = &trace_func_repeats_funcs,
1521 static struct trace_event *events[] __initdata = {
1526 &trace_user_stack_event,
1528 &trace_bprint_event,
1531 &trace_osnoise_event,
1532 &trace_timerlat_event,
1533 &trace_raw_data_event,
1534 &trace_func_repeats_event,
1538 __init int init_events(void)
1540 struct trace_event *event;
1543 for (i = 0; events[i]; i++) {
1545 ret = register_trace_event(event);
1546 WARN_ONCE(!ret, "event %d failed to register", event->type);