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 static DECLARE_RWSEM(trace_event_mutex);
19 DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq);
20 EXPORT_PER_CPU_SYMBOL(ftrace_event_seq);
22 static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
24 static int next_event_type = __TRACE_LAST_TYPE + 1;
26 void trace_print_seq(struct seq_file *m, struct trace_seq *s)
28 int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
31 seq_puts(m, s->buffer);
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;
43 trace_assign_type(field, entry);
45 ret = trace_seq_bprintf(s, field->fmt, field->buf);
47 return TRACE_TYPE_PARTIAL_LINE;
49 return TRACE_TYPE_HANDLED;
52 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
54 struct trace_seq *s = &iter->seq;
55 struct trace_entry *entry = iter->ent;
56 struct print_entry *field;
59 trace_assign_type(field, entry);
61 ret = trace_seq_printf(s, "%s", field->buf);
63 return TRACE_TYPE_PARTIAL_LINE;
65 return TRACE_TYPE_HANDLED;
69 * trace_seq_printf - sequence printing of trace information
70 * @s: trace sequence descriptor
71 * @fmt: printf format string
73 * The tracer may use either sequence operations or its own
74 * copy to user routines. To simplify formating of a trace
75 * trace_seq_printf is used to store strings into a special
76 * buffer (@s). Then the output may be either used by
77 * the sequencer or pulled into another buffer.
80 trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
82 int len = (PAGE_SIZE - 1) - s->len;
90 ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
93 /* If we can't write it all, don't bother writing anything */
101 EXPORT_SYMBOL_GPL(trace_seq_printf);
104 * trace_seq_vprintf - sequence printing of trace information
105 * @s: trace sequence descriptor
106 * @fmt: printf format string
108 * The tracer may use either sequence operations or its own
109 * copy to user routines. To simplify formating of a trace
110 * trace_seq_printf is used to store strings into a special
111 * buffer (@s). Then the output may be either used by
112 * the sequencer or pulled into another buffer.
115 trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
117 int len = (PAGE_SIZE - 1) - s->len;
123 ret = vsnprintf(s->buffer + s->len, len, fmt, args);
125 /* If we can't write it all, don't bother writing anything */
133 EXPORT_SYMBOL_GPL(trace_seq_vprintf);
135 int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
137 int len = (PAGE_SIZE - 1) - s->len;
143 ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
145 /* If we can't write it all, don't bother writing anything */
155 * trace_seq_puts - trace sequence printing of simple string
156 * @s: trace sequence descriptor
157 * @str: simple string to record
159 * The tracer may use either the sequence operations or its own
160 * copy to user routines. This function records a simple string
161 * into a special buffer (@s) for later retrieval by a sequencer
162 * or other mechanism.
164 int trace_seq_puts(struct trace_seq *s, const char *str)
166 int len = strlen(str);
168 if (len > ((PAGE_SIZE - 1) - s->len))
171 memcpy(s->buffer + s->len, str, len);
177 int trace_seq_putc(struct trace_seq *s, unsigned char c)
179 if (s->len >= (PAGE_SIZE - 1))
182 s->buffer[s->len++] = c;
187 int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
189 if (len > ((PAGE_SIZE - 1) - s->len))
192 memcpy(s->buffer + s->len, mem, len);
198 int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
200 unsigned char hex[HEX_CHARS];
201 const unsigned char *data = mem;
205 for (i = 0, j = 0; i < len; i++) {
207 for (i = len-1, j = 0; i >= 0; i--) {
209 hex[j++] = hex_asc_hi(data[i]);
210 hex[j++] = hex_asc_lo(data[i]);
214 return trace_seq_putmem(s, hex, j);
217 void *trace_seq_reserve(struct trace_seq *s, size_t len)
221 if (len > ((PAGE_SIZE - 1) - s->len))
224 ret = s->buffer + s->len;
230 int trace_seq_path(struct trace_seq *s, struct path *path)
234 if (s->len >= (PAGE_SIZE - 1))
236 p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
238 p = mangle_path(s->buffer + s->len, p, "\n");
240 s->len = p - s->buffer;
244 s->buffer[s->len++] = '?';
252 ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
254 const struct trace_print_flags *flag_array)
258 const char *ret = p->buffer + p->len;
261 for (i = 0; flag_array[i].name && flags; i++) {
263 mask = flag_array[i].mask;
264 if ((flags & mask) != mask)
267 str = flag_array[i].name;
270 trace_seq_puts(p, delim);
271 trace_seq_puts(p, str);
274 /* check for left over flags */
277 trace_seq_puts(p, delim);
278 trace_seq_printf(p, "0x%lx", flags);
281 trace_seq_putc(p, 0);
285 EXPORT_SYMBOL(ftrace_print_flags_seq);
288 ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
289 const struct trace_print_flags *symbol_array)
292 const char *ret = p->buffer + p->len;
294 for (i = 0; symbol_array[i].name; i++) {
296 if (val != symbol_array[i].mask)
299 trace_seq_puts(p, symbol_array[i].name);
304 trace_seq_printf(p, "0x%lx", val);
306 trace_seq_putc(p, 0);
310 EXPORT_SYMBOL(ftrace_print_symbols_seq);
312 #ifdef CONFIG_KRETPROBES
313 static inline const char *kretprobed(const char *name)
315 static const char tramp_name[] = "kretprobe_trampoline";
316 int size = sizeof(tramp_name);
318 if (strncmp(tramp_name, name, size) == 0)
319 return "[unknown/kretprobe'd]";
323 static inline const char *kretprobed(const char *name)
327 #endif /* CONFIG_KRETPROBES */
330 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
332 #ifdef CONFIG_KALLSYMS
333 char str[KSYM_SYMBOL_LEN];
336 kallsyms_lookup(address, NULL, NULL, NULL, str);
338 name = kretprobed(str);
340 return trace_seq_printf(s, fmt, name);
346 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
347 unsigned long address)
349 #ifdef CONFIG_KALLSYMS
350 char str[KSYM_SYMBOL_LEN];
353 sprint_symbol(str, address);
354 name = kretprobed(str);
356 return trace_seq_printf(s, fmt, name);
362 # define IP_FMT "%08lx"
364 # define IP_FMT "%016lx"
367 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
368 unsigned long ip, unsigned long sym_flags)
370 struct file *file = NULL;
371 unsigned long vmstart = 0;
375 const struct vm_area_struct *vma;
377 down_read(&mm->mmap_sem);
378 vma = find_vma(mm, ip);
381 vmstart = vma->vm_start;
384 ret = trace_seq_path(s, &file->f_path);
386 ret = trace_seq_printf(s, "[+0x%lx]",
389 up_read(&mm->mmap_sem);
391 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
392 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
397 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
398 unsigned long sym_flags)
400 struct mm_struct *mm = NULL;
404 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
405 struct task_struct *task;
407 * we do the lookup on the thread group leader,
408 * since individual threads might have already quit!
411 task = find_task_by_vpid(entry->ent.tgid);
413 mm = get_task_mm(task);
417 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
418 unsigned long ip = entry->caller[i];
420 if (ip == ULONG_MAX || !ret)
423 ret = trace_seq_puts(s, " => ");
426 ret = trace_seq_puts(s, "??");
428 ret = trace_seq_puts(s, "\n");
434 ret = seq_print_user_ip(s, mm, ip, sym_flags);
435 ret = trace_seq_puts(s, "\n");
444 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
449 return trace_seq_printf(s, "0");
451 if (sym_flags & TRACE_ITER_SYM_OFFSET)
452 ret = seq_print_sym_offset(s, "%s", ip);
454 ret = seq_print_sym_short(s, "%s", ip);
459 if (sym_flags & TRACE_ITER_SYM_ADDR)
460 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
465 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
467 int hardirq, softirq;
468 char comm[TASK_COMM_LEN];
470 trace_find_cmdline(entry->pid, comm);
471 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
472 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
474 if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c",
475 comm, entry->pid, cpu,
476 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
477 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
479 (entry->flags & TRACE_FLAG_NEED_RESCHED) ?
481 (hardirq && softirq) ? 'H' :
482 hardirq ? 'h' : softirq ? 's' : '.'))
485 if (entry->preempt_count)
486 return trace_seq_printf(s, "%x", entry->preempt_count);
487 return trace_seq_puts(s, ".");
490 static unsigned long preempt_mark_thresh = 100;
493 lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
494 unsigned long rel_usecs)
496 return trace_seq_printf(s, " %4lldus%c: ", abs_usecs,
497 rel_usecs > preempt_mark_thresh ? '!' :
498 rel_usecs > 1 ? '+' : ' ');
501 int trace_print_context(struct trace_iterator *iter)
503 struct trace_seq *s = &iter->seq;
504 struct trace_entry *entry = iter->ent;
505 unsigned long long t = ns2usecs(iter->ts);
506 unsigned long usec_rem = do_div(t, USEC_PER_SEC);
507 unsigned long secs = (unsigned long)t;
508 char comm[TASK_COMM_LEN];
510 trace_find_cmdline(entry->pid, comm);
512 return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ",
513 comm, entry->pid, iter->cpu, secs, usec_rem);
516 int trace_print_lat_context(struct trace_iterator *iter)
520 struct trace_seq *s = &iter->seq;
521 struct trace_entry *entry = iter->ent,
522 *next_entry = trace_find_next_entry(iter, NULL,
524 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
525 unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
526 unsigned long rel_usecs;
530 rel_usecs = ns2usecs(next_ts - iter->ts);
533 char comm[TASK_COMM_LEN];
535 trace_find_cmdline(entry->pid, comm);
537 ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]"
538 " %ld.%03ldms (+%ld.%03ldms): ", comm,
539 entry->pid, iter->cpu, entry->flags,
540 entry->preempt_count, iter->idx,
542 abs_usecs / USEC_PER_MSEC,
543 abs_usecs % USEC_PER_MSEC,
544 rel_usecs / USEC_PER_MSEC,
545 rel_usecs % USEC_PER_MSEC);
547 ret = lat_print_generic(s, entry, iter->cpu);
549 ret = lat_print_timestamp(s, abs_usecs, rel_usecs);
555 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
557 static int task_state_char(unsigned long state)
559 int bit = state ? __ffs(state) + 1 : 0;
561 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
565 * ftrace_find_event - find a registered event
566 * @type: the type of event to look for
568 * Returns an event of type @type otherwise NULL
569 * Called with trace_event_read_lock() held.
571 struct trace_event *ftrace_find_event(int type)
573 struct trace_event *event;
574 struct hlist_node *n;
577 key = type & (EVENT_HASHSIZE - 1);
579 hlist_for_each_entry(event, n, &event_hash[key], node) {
580 if (event->type == type)
587 static LIST_HEAD(ftrace_event_list);
589 static int trace_search_list(struct list_head **list)
591 struct trace_event *e;
592 int last = __TRACE_LAST_TYPE;
594 if (list_empty(&ftrace_event_list)) {
595 *list = &ftrace_event_list;
600 * We used up all possible max events,
601 * lets see if somebody freed one.
603 list_for_each_entry(e, &ftrace_event_list, list) {
604 if (e->type != last + 1)
609 /* Did we used up all 65 thousand events??? */
610 if ((last + 1) > FTRACE_MAX_EVENT)
617 void trace_event_read_lock(void)
619 down_read(&trace_event_mutex);
622 void trace_event_read_unlock(void)
624 up_read(&trace_event_mutex);
628 * register_ftrace_event - register output for an event type
629 * @event: the event type to register
631 * Event types are stored in a hash and this hash is used to
632 * find a way to print an event. If the @event->type is set
633 * then it will use that type, otherwise it will assign a
636 * If you assign your own type, please make sure it is added
637 * to the trace_type enum in trace.h, to avoid collisions
638 * with the dynamic types.
640 * Returns the event type number or zero on error.
642 int register_ftrace_event(struct trace_event *event)
647 down_write(&trace_event_mutex);
652 INIT_LIST_HEAD(&event->list);
655 struct list_head *list = NULL;
657 if (next_event_type > FTRACE_MAX_EVENT) {
659 event->type = trace_search_list(&list);
665 event->type = next_event_type++;
666 list = &ftrace_event_list;
669 if (WARN_ON(ftrace_find_event(event->type)))
672 list_add_tail(&event->list, list);
674 } else if (event->type > __TRACE_LAST_TYPE) {
675 printk(KERN_WARNING "Need to add type to trace.h\n");
679 /* Is this event already used */
680 if (ftrace_find_event(event->type))
684 if (event->trace == NULL)
685 event->trace = trace_nop_print;
686 if (event->raw == NULL)
687 event->raw = trace_nop_print;
688 if (event->hex == NULL)
689 event->hex = trace_nop_print;
690 if (event->binary == NULL)
691 event->binary = trace_nop_print;
693 key = event->type & (EVENT_HASHSIZE - 1);
695 hlist_add_head(&event->node, &event_hash[key]);
699 up_write(&trace_event_mutex);
703 EXPORT_SYMBOL_GPL(register_ftrace_event);
706 * unregister_ftrace_event - remove a no longer used event
707 * @event: the event to remove
709 int unregister_ftrace_event(struct trace_event *event)
711 down_write(&trace_event_mutex);
712 hlist_del(&event->node);
713 list_del(&event->list);
714 up_write(&trace_event_mutex);
718 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
724 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags)
726 return TRACE_TYPE_HANDLED;
730 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags)
732 struct ftrace_entry *field;
733 struct trace_seq *s = &iter->seq;
735 trace_assign_type(field, iter->ent);
737 if (!seq_print_ip_sym(s, field->ip, flags))
740 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
741 if (!trace_seq_printf(s, " <-"))
743 if (!seq_print_ip_sym(s,
748 if (!trace_seq_printf(s, "\n"))
751 return TRACE_TYPE_HANDLED;
754 return TRACE_TYPE_PARTIAL_LINE;
757 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags)
759 struct ftrace_entry *field;
761 trace_assign_type(field, iter->ent);
763 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
766 return TRACE_TYPE_PARTIAL_LINE;
768 return TRACE_TYPE_HANDLED;
771 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags)
773 struct ftrace_entry *field;
774 struct trace_seq *s = &iter->seq;
776 trace_assign_type(field, iter->ent);
778 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
779 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
781 return TRACE_TYPE_HANDLED;
784 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags)
786 struct ftrace_entry *field;
787 struct trace_seq *s = &iter->seq;
789 trace_assign_type(field, iter->ent);
791 SEQ_PUT_FIELD_RET(s, field->ip);
792 SEQ_PUT_FIELD_RET(s, field->parent_ip);
794 return TRACE_TYPE_HANDLED;
797 static struct trace_event trace_fn_event = {
799 .trace = trace_fn_trace,
802 .binary = trace_fn_bin,
805 /* TRACE_CTX an TRACE_WAKE */
806 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
809 struct ctx_switch_entry *field;
810 char comm[TASK_COMM_LEN];
814 trace_assign_type(field, iter->ent);
816 T = task_state_char(field->next_state);
817 S = task_state_char(field->prev_state);
818 trace_find_cmdline(field->next_pid, comm);
819 if (!trace_seq_printf(&iter->seq,
820 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
828 return TRACE_TYPE_PARTIAL_LINE;
830 return TRACE_TYPE_HANDLED;
833 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags)
835 return trace_ctxwake_print(iter, "==>");
838 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
841 return trace_ctxwake_print(iter, " +");
844 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
846 struct ctx_switch_entry *field;
849 trace_assign_type(field, iter->ent);
852 task_state_char(field->prev_state);
853 T = task_state_char(field->next_state);
854 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
862 return TRACE_TYPE_PARTIAL_LINE;
864 return TRACE_TYPE_HANDLED;
867 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags)
869 return trace_ctxwake_raw(iter, 0);
872 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags)
874 return trace_ctxwake_raw(iter, '+');
878 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
880 struct ctx_switch_entry *field;
881 struct trace_seq *s = &iter->seq;
884 trace_assign_type(field, iter->ent);
887 task_state_char(field->prev_state);
888 T = task_state_char(field->next_state);
890 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
891 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
892 SEQ_PUT_HEX_FIELD_RET(s, S);
893 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
894 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
895 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
896 SEQ_PUT_HEX_FIELD_RET(s, T);
898 return TRACE_TYPE_HANDLED;
901 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags)
903 return trace_ctxwake_hex(iter, 0);
906 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags)
908 return trace_ctxwake_hex(iter, '+');
911 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
914 struct ctx_switch_entry *field;
915 struct trace_seq *s = &iter->seq;
917 trace_assign_type(field, iter->ent);
919 SEQ_PUT_FIELD_RET(s, field->prev_pid);
920 SEQ_PUT_FIELD_RET(s, field->prev_prio);
921 SEQ_PUT_FIELD_RET(s, field->prev_state);
922 SEQ_PUT_FIELD_RET(s, field->next_pid);
923 SEQ_PUT_FIELD_RET(s, field->next_prio);
924 SEQ_PUT_FIELD_RET(s, field->next_state);
926 return TRACE_TYPE_HANDLED;
929 static struct trace_event trace_ctx_event = {
931 .trace = trace_ctx_print,
932 .raw = trace_ctx_raw,
933 .hex = trace_ctx_hex,
934 .binary = trace_ctxwake_bin,
937 static struct trace_event trace_wake_event = {
939 .trace = trace_wake_print,
940 .raw = trace_wake_raw,
941 .hex = trace_wake_hex,
942 .binary = trace_ctxwake_bin,
946 static enum print_line_t trace_special_print(struct trace_iterator *iter,
949 struct special_entry *field;
951 trace_assign_type(field, iter->ent);
953 if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n",
957 return TRACE_TYPE_PARTIAL_LINE;
959 return TRACE_TYPE_HANDLED;
962 static enum print_line_t trace_special_hex(struct trace_iterator *iter,
965 struct special_entry *field;
966 struct trace_seq *s = &iter->seq;
968 trace_assign_type(field, iter->ent);
970 SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
971 SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
972 SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
974 return TRACE_TYPE_HANDLED;
977 static enum print_line_t trace_special_bin(struct trace_iterator *iter,
980 struct special_entry *field;
981 struct trace_seq *s = &iter->seq;
983 trace_assign_type(field, iter->ent);
985 SEQ_PUT_FIELD_RET(s, field->arg1);
986 SEQ_PUT_FIELD_RET(s, field->arg2);
987 SEQ_PUT_FIELD_RET(s, field->arg3);
989 return TRACE_TYPE_HANDLED;
992 static struct trace_event trace_special_event = {
993 .type = TRACE_SPECIAL,
994 .trace = trace_special_print,
995 .raw = trace_special_print,
996 .hex = trace_special_hex,
997 .binary = trace_special_bin,
1002 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1005 struct stack_entry *field;
1006 struct trace_seq *s = &iter->seq;
1009 trace_assign_type(field, iter->ent);
1011 if (!trace_seq_puts(s, "<stack trace>\n"))
1013 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1014 if (!field->caller[i] || (field->caller[i] == ULONG_MAX))
1016 if (!trace_seq_puts(s, " => "))
1019 if (!seq_print_ip_sym(s, field->caller[i], flags))
1021 if (!trace_seq_puts(s, "\n"))
1025 return TRACE_TYPE_HANDLED;
1028 return TRACE_TYPE_PARTIAL_LINE;
1031 static struct trace_event trace_stack_event = {
1032 .type = TRACE_STACK,
1033 .trace = trace_stack_print,
1034 .raw = trace_special_print,
1035 .hex = trace_special_hex,
1036 .binary = trace_special_bin,
1039 /* TRACE_USER_STACK */
1040 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1043 struct userstack_entry *field;
1044 struct trace_seq *s = &iter->seq;
1046 trace_assign_type(field, iter->ent);
1048 if (!trace_seq_puts(s, "<user stack trace>\n"))
1051 if (!seq_print_userip_objs(field, s, flags))
1054 return TRACE_TYPE_HANDLED;
1057 return TRACE_TYPE_PARTIAL_LINE;
1060 static struct trace_event trace_user_stack_event = {
1061 .type = TRACE_USER_STACK,
1062 .trace = trace_user_stack_print,
1063 .raw = trace_special_print,
1064 .hex = trace_special_hex,
1065 .binary = trace_special_bin,
1069 static enum print_line_t
1070 trace_bprint_print(struct trace_iterator *iter, int flags)
1072 struct trace_entry *entry = iter->ent;
1073 struct trace_seq *s = &iter->seq;
1074 struct bprint_entry *field;
1076 trace_assign_type(field, entry);
1078 if (!seq_print_ip_sym(s, field->ip, flags))
1081 if (!trace_seq_puts(s, ": "))
1084 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1087 return TRACE_TYPE_HANDLED;
1090 return TRACE_TYPE_PARTIAL_LINE;
1094 static enum print_line_t
1095 trace_bprint_raw(struct trace_iterator *iter, int flags)
1097 struct bprint_entry *field;
1098 struct trace_seq *s = &iter->seq;
1100 trace_assign_type(field, iter->ent);
1102 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1105 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1108 return TRACE_TYPE_HANDLED;
1111 return TRACE_TYPE_PARTIAL_LINE;
1115 static struct trace_event trace_bprint_event = {
1116 .type = TRACE_BPRINT,
1117 .trace = trace_bprint_print,
1118 .raw = trace_bprint_raw,
1122 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1125 struct print_entry *field;
1126 struct trace_seq *s = &iter->seq;
1128 trace_assign_type(field, iter->ent);
1130 if (!seq_print_ip_sym(s, field->ip, flags))
1133 if (!trace_seq_printf(s, ": %s", field->buf))
1136 return TRACE_TYPE_HANDLED;
1139 return TRACE_TYPE_PARTIAL_LINE;
1142 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags)
1144 struct print_entry *field;
1146 trace_assign_type(field, iter->ent);
1148 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1151 return TRACE_TYPE_HANDLED;
1154 return TRACE_TYPE_PARTIAL_LINE;
1157 static struct trace_event trace_print_event = {
1158 .type = TRACE_PRINT,
1159 .trace = trace_print_print,
1160 .raw = trace_print_raw,
1164 static struct trace_event *events[] __initdata = {
1168 &trace_special_event,
1170 &trace_user_stack_event,
1171 &trace_bprint_event,
1176 __init static int init_events(void)
1178 struct trace_event *event;
1181 for (i = 0; events[i]; i++) {
1184 ret = register_ftrace_event(event);
1186 printk(KERN_WARNING "event %d failed to register\n",
1194 device_initcall(init_events);