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_mutex);
19 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
21 static int next_event_type = __TRACE_LAST_TYPE + 1;
23 int trace_print_seq(struct seq_file *m, struct trace_seq *s)
25 int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
28 ret = seq_write(m, s->buffer, len);
31 * Only reset this buffer if we successfully wrote to the
40 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
42 struct trace_seq *s = &iter->seq;
43 struct trace_entry *entry = iter->ent;
44 struct bprint_entry *field;
47 trace_assign_type(field, entry);
49 ret = trace_seq_bprintf(s, field->fmt, field->buf);
51 return TRACE_TYPE_PARTIAL_LINE;
53 return TRACE_TYPE_HANDLED;
56 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
58 struct trace_seq *s = &iter->seq;
59 struct trace_entry *entry = iter->ent;
60 struct print_entry *field;
63 trace_assign_type(field, entry);
65 ret = trace_seq_printf(s, "%s", field->buf);
67 return TRACE_TYPE_PARTIAL_LINE;
69 return TRACE_TYPE_HANDLED;
73 * trace_seq_printf - sequence printing of trace information
74 * @s: trace sequence descriptor
75 * @fmt: printf format string
77 * It returns 0 if the trace oversizes the buffer's free
80 * The tracer may use either sequence operations or its own
81 * copy to user routines. To simplify formating of a trace
82 * trace_seq_printf is used to store strings into a special
83 * buffer (@s). Then the output may be either used by
84 * the sequencer or pulled into another buffer.
87 trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
89 int len = (PAGE_SIZE - 1) - s->len;
97 ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
100 /* If we can't write it all, don't bother writing anything */
110 EXPORT_SYMBOL_GPL(trace_seq_printf);
113 * trace_seq_vprintf - sequence printing of trace information
114 * @s: trace sequence descriptor
115 * @fmt: printf format string
117 * The tracer may use either sequence operations or its own
118 * copy to user routines. To simplify formating of a trace
119 * trace_seq_printf is used to store strings into a special
120 * buffer (@s). Then the output may be either used by
121 * the sequencer or pulled into another buffer.
124 trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
126 int len = (PAGE_SIZE - 1) - s->len;
132 ret = vsnprintf(s->buffer + s->len, len, fmt, args);
134 /* If we can't write it all, don't bother writing anything */
144 EXPORT_SYMBOL_GPL(trace_seq_vprintf);
146 int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
148 int len = (PAGE_SIZE - 1) - s->len;
154 ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
156 /* If we can't write it all, don't bother writing anything */
168 * trace_seq_puts - trace sequence printing of simple string
169 * @s: trace sequence descriptor
170 * @str: simple string to record
172 * The tracer may use either the sequence operations or its own
173 * copy to user routines. This function records a simple string
174 * into a special buffer (@s) for later retrieval by a sequencer
175 * or other mechanism.
177 int trace_seq_puts(struct trace_seq *s, const char *str)
179 int len = strlen(str);
184 if (len > ((PAGE_SIZE - 1) - s->len)) {
189 memcpy(s->buffer + s->len, str, len);
195 int trace_seq_putc(struct trace_seq *s, unsigned char c)
200 if (s->len >= (PAGE_SIZE - 1)) {
205 s->buffer[s->len++] = c;
209 EXPORT_SYMBOL(trace_seq_putc);
211 int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
216 if (len > ((PAGE_SIZE - 1) - s->len)) {
221 memcpy(s->buffer + s->len, mem, len);
227 int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
229 unsigned char hex[HEX_CHARS];
230 const unsigned char *data = mem;
237 for (i = 0, j = 0; i < len; i++) {
239 for (i = len-1, j = 0; i >= 0; i--) {
241 hex[j++] = hex_asc_hi(data[i]);
242 hex[j++] = hex_asc_lo(data[i]);
246 return trace_seq_putmem(s, hex, j);
249 void *trace_seq_reserve(struct trace_seq *s, size_t len)
256 if (len > ((PAGE_SIZE - 1) - s->len)) {
261 ret = s->buffer + s->len;
267 int trace_seq_path(struct trace_seq *s, const struct path *path)
274 if (s->len >= (PAGE_SIZE - 1)) {
279 p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
281 p = mangle_path(s->buffer + s->len, p, "\n");
283 s->len = p - s->buffer;
287 s->buffer[s->len++] = '?';
296 ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
298 const struct trace_print_flags *flag_array)
302 const char *ret = p->buffer + p->len;
305 for (i = 0; flag_array[i].name && flags; i++) {
307 mask = flag_array[i].mask;
308 if ((flags & mask) != mask)
311 str = flag_array[i].name;
314 trace_seq_puts(p, delim);
317 trace_seq_puts(p, str);
320 /* check for left over flags */
323 trace_seq_puts(p, delim);
324 trace_seq_printf(p, "0x%lx", flags);
327 trace_seq_putc(p, 0);
331 EXPORT_SYMBOL(ftrace_print_flags_seq);
334 ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
335 const struct trace_print_flags *symbol_array)
338 const char *ret = p->buffer + p->len;
340 for (i = 0; symbol_array[i].name; i++) {
342 if (val != symbol_array[i].mask)
345 trace_seq_puts(p, symbol_array[i].name);
349 if (ret == (const char *)(p->buffer + p->len))
350 trace_seq_printf(p, "0x%lx", val);
352 trace_seq_putc(p, 0);
356 EXPORT_SYMBOL(ftrace_print_symbols_seq);
358 #if BITS_PER_LONG == 32
360 ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
361 const struct trace_print_flags_u64 *symbol_array)
364 const char *ret = p->buffer + p->len;
366 for (i = 0; symbol_array[i].name; i++) {
368 if (val != symbol_array[i].mask)
371 trace_seq_puts(p, symbol_array[i].name);
375 if (ret == (const char *)(p->buffer + p->len))
376 trace_seq_printf(p, "0x%llx", val);
378 trace_seq_putc(p, 0);
382 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
386 ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
389 const char *ret = p->buffer + p->len;
391 for (i = 0; i < buf_len; i++)
392 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
394 trace_seq_putc(p, 0);
398 EXPORT_SYMBOL(ftrace_print_hex_seq);
400 #ifdef CONFIG_KRETPROBES
401 static inline const char *kretprobed(const char *name)
403 static const char tramp_name[] = "kretprobe_trampoline";
404 int size = sizeof(tramp_name);
406 if (strncmp(tramp_name, name, size) == 0)
407 return "[unknown/kretprobe'd]";
411 static inline const char *kretprobed(const char *name)
415 #endif /* CONFIG_KRETPROBES */
418 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
420 #ifdef CONFIG_KALLSYMS
421 char str[KSYM_SYMBOL_LEN];
424 kallsyms_lookup(address, NULL, NULL, NULL, str);
426 name = kretprobed(str);
428 return trace_seq_printf(s, fmt, name);
434 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
435 unsigned long address)
437 #ifdef CONFIG_KALLSYMS
438 char str[KSYM_SYMBOL_LEN];
441 sprint_symbol(str, address);
442 name = kretprobed(str);
444 return trace_seq_printf(s, fmt, name);
450 # define IP_FMT "%08lx"
452 # define IP_FMT "%016lx"
455 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
456 unsigned long ip, unsigned long sym_flags)
458 struct file *file = NULL;
459 unsigned long vmstart = 0;
466 const struct vm_area_struct *vma;
468 down_read(&mm->mmap_sem);
469 vma = find_vma(mm, ip);
472 vmstart = vma->vm_start;
475 ret = trace_seq_path(s, &file->f_path);
477 ret = trace_seq_printf(s, "[+0x%lx]",
480 up_read(&mm->mmap_sem);
482 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
483 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
488 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
489 unsigned long sym_flags)
491 struct mm_struct *mm = NULL;
495 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
496 struct task_struct *task;
498 * we do the lookup on the thread group leader,
499 * since individual threads might have already quit!
502 task = find_task_by_vpid(entry->tgid);
504 mm = get_task_mm(task);
508 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
509 unsigned long ip = entry->caller[i];
511 if (ip == ULONG_MAX || !ret)
514 ret = trace_seq_puts(s, " => ");
517 ret = trace_seq_puts(s, "??");
519 ret = trace_seq_puts(s, "\n");
525 ret = seq_print_user_ip(s, mm, ip, sym_flags);
526 ret = trace_seq_puts(s, "\n");
535 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
540 return trace_seq_printf(s, "0");
542 if (sym_flags & TRACE_ITER_SYM_OFFSET)
543 ret = seq_print_sym_offset(s, "%s", ip);
545 ret = seq_print_sym_short(s, "%s", ip);
550 if (sym_flags & TRACE_ITER_SYM_ADDR)
551 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
556 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
557 * @s: trace seq struct to write to
558 * @entry: The trace entry field from the ring buffer
560 * Prints the generic fields of irqs off, in hard or softirq, preempt
563 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
572 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
573 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
576 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
577 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
580 (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.';
582 (hardirq && softirq) ? 'H' :
587 if (!trace_seq_printf(s, "%c%c%c",
588 irqs_off, need_resched, hardsoft_irq))
591 if (entry->preempt_count)
592 ret = trace_seq_printf(s, "%x", entry->preempt_count);
594 ret = trace_seq_putc(s, '.');
600 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
602 char comm[TASK_COMM_LEN];
604 trace_find_cmdline(entry->pid, comm);
606 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
607 comm, entry->pid, cpu))
610 return trace_print_lat_fmt(s, entry);
613 static unsigned long preempt_mark_thresh_us = 100;
616 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
618 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
619 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
620 unsigned long long abs_ts = iter->ts - iter->tr->time_start;
621 unsigned long long rel_ts = next_ts - iter->ts;
622 struct trace_seq *s = &iter->seq;
625 abs_ts = ns2usecs(abs_ts);
626 rel_ts = ns2usecs(rel_ts);
629 if (verbose && in_ns) {
630 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
631 unsigned long abs_msec = (unsigned long)abs_ts;
632 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
633 unsigned long rel_msec = (unsigned long)rel_ts;
635 return trace_seq_printf(
636 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
640 } else if (verbose && !in_ns) {
641 return trace_seq_printf(
642 s, "[%016llx] %lld (+%lld): ",
643 iter->ts, abs_ts, rel_ts);
644 } else if (!verbose && in_ns) {
645 return trace_seq_printf(
648 rel_ts > preempt_mark_thresh_us ? '!' :
649 rel_ts > 1 ? '+' : ' ');
650 } else { /* !verbose && !in_ns */
651 return trace_seq_printf(s, " %4lld: ", abs_ts);
655 int trace_print_context(struct trace_iterator *iter)
657 struct trace_seq *s = &iter->seq;
658 struct trace_entry *entry = iter->ent;
659 unsigned long long t;
660 unsigned long secs, usec_rem;
661 char comm[TASK_COMM_LEN];
664 trace_find_cmdline(entry->pid, comm);
666 ret = trace_seq_printf(s, "%16s-%-5d [%03d] ",
667 comm, entry->pid, iter->cpu);
671 if (trace_flags & TRACE_ITER_IRQ_INFO) {
672 ret = trace_print_lat_fmt(s, entry);
677 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
678 t = ns2usecs(iter->ts);
679 usec_rem = do_div(t, USEC_PER_SEC);
680 secs = (unsigned long)t;
681 return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
683 return trace_seq_printf(s, " %12llu: ", iter->ts);
686 int trace_print_lat_context(struct trace_iterator *iter)
690 /* trace_find_next_entry will reset ent_size */
691 int ent_size = iter->ent_size;
692 struct trace_seq *s = &iter->seq;
693 struct trace_entry *entry = iter->ent,
694 *next_entry = trace_find_next_entry(iter, NULL,
696 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
698 /* Restore the original ent_size */
699 iter->ent_size = ent_size;
705 char comm[TASK_COMM_LEN];
707 trace_find_cmdline(entry->pid, comm);
709 ret = trace_seq_printf(
710 s, "%16s %5d %3d %d %08x %08lx ",
711 comm, entry->pid, iter->cpu, entry->flags,
712 entry->preempt_count, iter->idx);
714 ret = lat_print_generic(s, entry, iter->cpu);
718 ret = lat_print_timestamp(iter, next_ts);
723 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
725 static int task_state_char(unsigned long state)
727 int bit = state ? __ffs(state) + 1 : 0;
729 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
733 * ftrace_find_event - find a registered event
734 * @type: the type of event to look for
736 * Returns an event of type @type otherwise NULL
737 * Called with trace_event_read_lock() held.
739 struct trace_event *ftrace_find_event(int type)
741 struct trace_event *event;
742 struct hlist_node *n;
745 key = type & (EVENT_HASHSIZE - 1);
747 hlist_for_each_entry(event, n, &event_hash[key], node) {
748 if (event->type == type)
755 static LIST_HEAD(ftrace_event_list);
757 static int trace_search_list(struct list_head **list)
759 struct trace_event *e;
760 int last = __TRACE_LAST_TYPE;
762 if (list_empty(&ftrace_event_list)) {
763 *list = &ftrace_event_list;
768 * We used up all possible max events,
769 * lets see if somebody freed one.
771 list_for_each_entry(e, &ftrace_event_list, list) {
772 if (e->type != last + 1)
777 /* Did we used up all 65 thousand events??? */
778 if ((last + 1) > FTRACE_MAX_EVENT)
785 void trace_event_read_lock(void)
787 down_read(&trace_event_mutex);
790 void trace_event_read_unlock(void)
792 up_read(&trace_event_mutex);
796 * register_ftrace_event - register output for an event type
797 * @event: the event type to register
799 * Event types are stored in a hash and this hash is used to
800 * find a way to print an event. If the @event->type is set
801 * then it will use that type, otherwise it will assign a
804 * If you assign your own type, please make sure it is added
805 * to the trace_type enum in trace.h, to avoid collisions
806 * with the dynamic types.
808 * Returns the event type number or zero on error.
810 int register_ftrace_event(struct trace_event *event)
815 down_write(&trace_event_mutex);
820 if (WARN_ON(!event->funcs))
823 INIT_LIST_HEAD(&event->list);
826 struct list_head *list = NULL;
828 if (next_event_type > FTRACE_MAX_EVENT) {
830 event->type = trace_search_list(&list);
836 event->type = next_event_type++;
837 list = &ftrace_event_list;
840 if (WARN_ON(ftrace_find_event(event->type)))
843 list_add_tail(&event->list, list);
845 } else if (event->type > __TRACE_LAST_TYPE) {
846 printk(KERN_WARNING "Need to add type to trace.h\n");
850 /* Is this event already used */
851 if (ftrace_find_event(event->type))
855 if (event->funcs->trace == NULL)
856 event->funcs->trace = trace_nop_print;
857 if (event->funcs->raw == NULL)
858 event->funcs->raw = trace_nop_print;
859 if (event->funcs->hex == NULL)
860 event->funcs->hex = trace_nop_print;
861 if (event->funcs->binary == NULL)
862 event->funcs->binary = trace_nop_print;
864 key = event->type & (EVENT_HASHSIZE - 1);
866 hlist_add_head(&event->node, &event_hash[key]);
870 up_write(&trace_event_mutex);
874 EXPORT_SYMBOL_GPL(register_ftrace_event);
877 * Used by module code with the trace_event_mutex held for write.
879 int __unregister_ftrace_event(struct trace_event *event)
881 hlist_del(&event->node);
882 list_del(&event->list);
887 * unregister_ftrace_event - remove a no longer used event
888 * @event: the event to remove
890 int unregister_ftrace_event(struct trace_event *event)
892 down_write(&trace_event_mutex);
893 __unregister_ftrace_event(event);
894 up_write(&trace_event_mutex);
898 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
904 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
905 struct trace_event *event)
907 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
908 return TRACE_TYPE_PARTIAL_LINE;
910 return TRACE_TYPE_HANDLED;
914 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
915 struct trace_event *event)
917 struct ftrace_entry *field;
918 struct trace_seq *s = &iter->seq;
920 trace_assign_type(field, iter->ent);
922 if (!seq_print_ip_sym(s, field->ip, flags))
925 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
926 if (!trace_seq_printf(s, " <-"))
928 if (!seq_print_ip_sym(s,
933 if (!trace_seq_printf(s, "\n"))
936 return TRACE_TYPE_HANDLED;
939 return TRACE_TYPE_PARTIAL_LINE;
942 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
943 struct trace_event *event)
945 struct ftrace_entry *field;
947 trace_assign_type(field, iter->ent);
949 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
952 return TRACE_TYPE_PARTIAL_LINE;
954 return TRACE_TYPE_HANDLED;
957 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
958 struct trace_event *event)
960 struct ftrace_entry *field;
961 struct trace_seq *s = &iter->seq;
963 trace_assign_type(field, iter->ent);
965 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
966 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
968 return TRACE_TYPE_HANDLED;
971 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
972 struct trace_event *event)
974 struct ftrace_entry *field;
975 struct trace_seq *s = &iter->seq;
977 trace_assign_type(field, iter->ent);
979 SEQ_PUT_FIELD_RET(s, field->ip);
980 SEQ_PUT_FIELD_RET(s, field->parent_ip);
982 return TRACE_TYPE_HANDLED;
985 static struct trace_event_functions trace_fn_funcs = {
986 .trace = trace_fn_trace,
989 .binary = trace_fn_bin,
992 static struct trace_event trace_fn_event = {
994 .funcs = &trace_fn_funcs,
997 /* TRACE_CTX an TRACE_WAKE */
998 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1001 struct ctx_switch_entry *field;
1002 char comm[TASK_COMM_LEN];
1006 trace_assign_type(field, iter->ent);
1008 T = task_state_char(field->next_state);
1009 S = task_state_char(field->prev_state);
1010 trace_find_cmdline(field->next_pid, comm);
1011 if (!trace_seq_printf(&iter->seq,
1012 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1020 return TRACE_TYPE_PARTIAL_LINE;
1022 return TRACE_TYPE_HANDLED;
1025 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1026 struct trace_event *event)
1028 return trace_ctxwake_print(iter, "==>");
1031 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1032 int flags, struct trace_event *event)
1034 return trace_ctxwake_print(iter, " +");
1037 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1039 struct ctx_switch_entry *field;
1042 trace_assign_type(field, iter->ent);
1045 S = task_state_char(field->prev_state);
1046 T = task_state_char(field->next_state);
1047 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1055 return TRACE_TYPE_PARTIAL_LINE;
1057 return TRACE_TYPE_HANDLED;
1060 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1061 struct trace_event *event)
1063 return trace_ctxwake_raw(iter, 0);
1066 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1067 struct trace_event *event)
1069 return trace_ctxwake_raw(iter, '+');
1073 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1075 struct ctx_switch_entry *field;
1076 struct trace_seq *s = &iter->seq;
1079 trace_assign_type(field, iter->ent);
1082 S = task_state_char(field->prev_state);
1083 T = task_state_char(field->next_state);
1085 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1086 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1087 SEQ_PUT_HEX_FIELD_RET(s, S);
1088 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1089 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1090 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1091 SEQ_PUT_HEX_FIELD_RET(s, T);
1093 return TRACE_TYPE_HANDLED;
1096 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1097 struct trace_event *event)
1099 return trace_ctxwake_hex(iter, 0);
1102 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1103 struct trace_event *event)
1105 return trace_ctxwake_hex(iter, '+');
1108 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1109 int flags, struct trace_event *event)
1111 struct ctx_switch_entry *field;
1112 struct trace_seq *s = &iter->seq;
1114 trace_assign_type(field, iter->ent);
1116 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1117 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1118 SEQ_PUT_FIELD_RET(s, field->prev_state);
1119 SEQ_PUT_FIELD_RET(s, field->next_pid);
1120 SEQ_PUT_FIELD_RET(s, field->next_prio);
1121 SEQ_PUT_FIELD_RET(s, field->next_state);
1123 return TRACE_TYPE_HANDLED;
1126 static struct trace_event_functions trace_ctx_funcs = {
1127 .trace = trace_ctx_print,
1128 .raw = trace_ctx_raw,
1129 .hex = trace_ctx_hex,
1130 .binary = trace_ctxwake_bin,
1133 static struct trace_event trace_ctx_event = {
1135 .funcs = &trace_ctx_funcs,
1138 static struct trace_event_functions trace_wake_funcs = {
1139 .trace = trace_wake_print,
1140 .raw = trace_wake_raw,
1141 .hex = trace_wake_hex,
1142 .binary = trace_ctxwake_bin,
1145 static struct trace_event trace_wake_event = {
1147 .funcs = &trace_wake_funcs,
1152 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1153 int flags, struct trace_event *event)
1155 struct stack_entry *field;
1156 struct trace_seq *s = &iter->seq;
1160 trace_assign_type(field, iter->ent);
1161 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1163 if (!trace_seq_puts(s, "<stack trace>\n"))
1166 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1167 if (!trace_seq_puts(s, " => "))
1170 if (!seq_print_ip_sym(s, *p, flags))
1172 if (!trace_seq_puts(s, "\n"))
1176 return TRACE_TYPE_HANDLED;
1179 return TRACE_TYPE_PARTIAL_LINE;
1182 static struct trace_event_functions trace_stack_funcs = {
1183 .trace = trace_stack_print,
1186 static struct trace_event trace_stack_event = {
1187 .type = TRACE_STACK,
1188 .funcs = &trace_stack_funcs,
1191 /* TRACE_USER_STACK */
1192 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1193 int flags, struct trace_event *event)
1195 struct userstack_entry *field;
1196 struct trace_seq *s = &iter->seq;
1198 trace_assign_type(field, iter->ent);
1200 if (!trace_seq_puts(s, "<user stack trace>\n"))
1203 if (!seq_print_userip_objs(field, s, flags))
1206 return TRACE_TYPE_HANDLED;
1209 return TRACE_TYPE_PARTIAL_LINE;
1212 static struct trace_event_functions trace_user_stack_funcs = {
1213 .trace = trace_user_stack_print,
1216 static struct trace_event trace_user_stack_event = {
1217 .type = TRACE_USER_STACK,
1218 .funcs = &trace_user_stack_funcs,
1222 static enum print_line_t
1223 trace_bprint_print(struct trace_iterator *iter, int flags,
1224 struct trace_event *event)
1226 struct trace_entry *entry = iter->ent;
1227 struct trace_seq *s = &iter->seq;
1228 struct bprint_entry *field;
1230 trace_assign_type(field, entry);
1232 if (!seq_print_ip_sym(s, field->ip, flags))
1235 if (!trace_seq_puts(s, ": "))
1238 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1241 return TRACE_TYPE_HANDLED;
1244 return TRACE_TYPE_PARTIAL_LINE;
1248 static enum print_line_t
1249 trace_bprint_raw(struct trace_iterator *iter, int flags,
1250 struct trace_event *event)
1252 struct bprint_entry *field;
1253 struct trace_seq *s = &iter->seq;
1255 trace_assign_type(field, iter->ent);
1257 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1260 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1263 return TRACE_TYPE_HANDLED;
1266 return TRACE_TYPE_PARTIAL_LINE;
1269 static struct trace_event_functions trace_bprint_funcs = {
1270 .trace = trace_bprint_print,
1271 .raw = trace_bprint_raw,
1274 static struct trace_event trace_bprint_event = {
1275 .type = TRACE_BPRINT,
1276 .funcs = &trace_bprint_funcs,
1280 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1281 int flags, struct trace_event *event)
1283 struct print_entry *field;
1284 struct trace_seq *s = &iter->seq;
1286 trace_assign_type(field, iter->ent);
1288 if (!seq_print_ip_sym(s, field->ip, flags))
1291 if (!trace_seq_printf(s, ": %s", field->buf))
1294 return TRACE_TYPE_HANDLED;
1297 return TRACE_TYPE_PARTIAL_LINE;
1300 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1301 struct trace_event *event)
1303 struct print_entry *field;
1305 trace_assign_type(field, iter->ent);
1307 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1310 return TRACE_TYPE_HANDLED;
1313 return TRACE_TYPE_PARTIAL_LINE;
1316 static struct trace_event_functions trace_print_funcs = {
1317 .trace = trace_print_print,
1318 .raw = trace_print_raw,
1321 static struct trace_event trace_print_event = {
1322 .type = TRACE_PRINT,
1323 .funcs = &trace_print_funcs,
1327 static struct trace_event *events[] __initdata = {
1332 &trace_user_stack_event,
1333 &trace_bprint_event,
1338 __init static int init_events(void)
1340 struct trace_event *event;
1343 for (i = 0; events[i]; i++) {
1346 ret = register_ftrace_event(event);
1348 printk(KERN_WARNING "event %d failed to register\n",
1356 early_initcall(init_events);