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, 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);
315 trace_seq_puts(p, str);
318 /* check for left over flags */
321 trace_seq_puts(p, delim);
322 trace_seq_printf(p, "0x%lx", flags);
325 trace_seq_putc(p, 0);
329 EXPORT_SYMBOL(ftrace_print_flags_seq);
332 ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
333 const struct trace_print_flags *symbol_array)
336 const char *ret = p->buffer + p->len;
338 for (i = 0; symbol_array[i].name; i++) {
340 if (val != symbol_array[i].mask)
343 trace_seq_puts(p, symbol_array[i].name);
348 trace_seq_printf(p, "0x%lx", val);
350 trace_seq_putc(p, 0);
354 EXPORT_SYMBOL(ftrace_print_symbols_seq);
356 #if BITS_PER_LONG == 32
358 ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
359 const struct trace_print_flags_u64 *symbol_array)
362 const char *ret = p->buffer + p->len;
364 for (i = 0; symbol_array[i].name; i++) {
366 if (val != symbol_array[i].mask)
369 trace_seq_puts(p, symbol_array[i].name);
374 trace_seq_printf(p, "0x%llx", val);
376 trace_seq_putc(p, 0);
380 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
384 ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
387 const char *ret = p->buffer + p->len;
389 for (i = 0; i < buf_len; i++)
390 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
392 trace_seq_putc(p, 0);
396 EXPORT_SYMBOL(ftrace_print_hex_seq);
398 #ifdef CONFIG_KRETPROBES
399 static inline const char *kretprobed(const char *name)
401 static const char tramp_name[] = "kretprobe_trampoline";
402 int size = sizeof(tramp_name);
404 if (strncmp(tramp_name, name, size) == 0)
405 return "[unknown/kretprobe'd]";
409 static inline const char *kretprobed(const char *name)
413 #endif /* CONFIG_KRETPROBES */
416 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
418 #ifdef CONFIG_KALLSYMS
419 char str[KSYM_SYMBOL_LEN];
422 kallsyms_lookup(address, NULL, NULL, NULL, str);
424 name = kretprobed(str);
426 return trace_seq_printf(s, fmt, name);
432 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
433 unsigned long address)
435 #ifdef CONFIG_KALLSYMS
436 char str[KSYM_SYMBOL_LEN];
439 sprint_symbol(str, address);
440 name = kretprobed(str);
442 return trace_seq_printf(s, fmt, name);
448 # define IP_FMT "%08lx"
450 # define IP_FMT "%016lx"
453 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
454 unsigned long ip, unsigned long sym_flags)
456 struct file *file = NULL;
457 unsigned long vmstart = 0;
464 const struct vm_area_struct *vma;
466 down_read(&mm->mmap_sem);
467 vma = find_vma(mm, ip);
470 vmstart = vma->vm_start;
473 ret = trace_seq_path(s, &file->f_path);
475 ret = trace_seq_printf(s, "[+0x%lx]",
478 up_read(&mm->mmap_sem);
480 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
481 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
486 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
487 unsigned long sym_flags)
489 struct mm_struct *mm = NULL;
493 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
494 struct task_struct *task;
496 * we do the lookup on the thread group leader,
497 * since individual threads might have already quit!
500 task = find_task_by_vpid(entry->tgid);
502 mm = get_task_mm(task);
506 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
507 unsigned long ip = entry->caller[i];
509 if (ip == ULONG_MAX || !ret)
512 ret = trace_seq_puts(s, " => ");
515 ret = trace_seq_puts(s, "??");
517 ret = trace_seq_puts(s, "\n");
523 ret = seq_print_user_ip(s, mm, ip, sym_flags);
524 ret = trace_seq_puts(s, "\n");
533 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
538 return trace_seq_printf(s, "0");
540 if (sym_flags & TRACE_ITER_SYM_OFFSET)
541 ret = seq_print_sym_offset(s, "%s", ip);
543 ret = seq_print_sym_short(s, "%s", ip);
548 if (sym_flags & TRACE_ITER_SYM_ADDR)
549 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
554 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
555 * @s: trace seq struct to write to
556 * @entry: The trace entry field from the ring buffer
558 * Prints the generic fields of irqs off, in hard or softirq, preempt
561 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
570 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
571 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
574 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
575 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
578 (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.';
580 (hardirq && softirq) ? 'H' :
585 if (!trace_seq_printf(s, "%c%c%c",
586 irqs_off, need_resched, hardsoft_irq))
589 if (entry->preempt_count)
590 ret = trace_seq_printf(s, "%x", entry->preempt_count);
592 ret = trace_seq_putc(s, '.');
598 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
600 char comm[TASK_COMM_LEN];
602 trace_find_cmdline(entry->pid, comm);
604 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
605 comm, entry->pid, cpu))
608 return trace_print_lat_fmt(s, entry);
611 static unsigned long preempt_mark_thresh = 100;
614 lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
615 unsigned long rel_usecs)
617 return trace_seq_printf(s, " %4lldus%c: ", abs_usecs,
618 rel_usecs > preempt_mark_thresh ? '!' :
619 rel_usecs > 1 ? '+' : ' ');
622 int trace_print_context(struct trace_iterator *iter)
624 struct trace_seq *s = &iter->seq;
625 struct trace_entry *entry = iter->ent;
626 unsigned long long t = ns2usecs(iter->ts);
627 unsigned long usec_rem = do_div(t, USEC_PER_SEC);
628 unsigned long secs = (unsigned long)t;
629 char comm[TASK_COMM_LEN];
631 trace_find_cmdline(entry->pid, comm);
633 return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ",
634 comm, entry->pid, iter->cpu, secs, usec_rem);
637 int trace_print_lat_context(struct trace_iterator *iter)
641 /* trace_find_next_entry will reset ent_size */
642 int ent_size = iter->ent_size;
643 struct trace_seq *s = &iter->seq;
644 struct trace_entry *entry = iter->ent,
645 *next_entry = trace_find_next_entry(iter, NULL,
647 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
648 unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
649 unsigned long rel_usecs;
651 /* Restore the original ent_size */
652 iter->ent_size = ent_size;
656 rel_usecs = ns2usecs(next_ts - iter->ts);
659 char comm[TASK_COMM_LEN];
661 trace_find_cmdline(entry->pid, comm);
663 ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]"
664 " %ld.%03ldms (+%ld.%03ldms): ", comm,
665 entry->pid, iter->cpu, entry->flags,
666 entry->preempt_count, iter->idx,
668 abs_usecs / USEC_PER_MSEC,
669 abs_usecs % USEC_PER_MSEC,
670 rel_usecs / USEC_PER_MSEC,
671 rel_usecs % USEC_PER_MSEC);
673 ret = lat_print_generic(s, entry, iter->cpu);
675 ret = lat_print_timestamp(s, abs_usecs, rel_usecs);
681 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
683 static int task_state_char(unsigned long state)
685 int bit = state ? __ffs(state) + 1 : 0;
687 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
691 * ftrace_find_event - find a registered event
692 * @type: the type of event to look for
694 * Returns an event of type @type otherwise NULL
695 * Called with trace_event_read_lock() held.
697 struct trace_event *ftrace_find_event(int type)
699 struct trace_event *event;
700 struct hlist_node *n;
703 key = type & (EVENT_HASHSIZE - 1);
705 hlist_for_each_entry(event, n, &event_hash[key], node) {
706 if (event->type == type)
713 static LIST_HEAD(ftrace_event_list);
715 static int trace_search_list(struct list_head **list)
717 struct trace_event *e;
718 int last = __TRACE_LAST_TYPE;
720 if (list_empty(&ftrace_event_list)) {
721 *list = &ftrace_event_list;
726 * We used up all possible max events,
727 * lets see if somebody freed one.
729 list_for_each_entry(e, &ftrace_event_list, list) {
730 if (e->type != last + 1)
735 /* Did we used up all 65 thousand events??? */
736 if ((last + 1) > FTRACE_MAX_EVENT)
743 void trace_event_read_lock(void)
745 down_read(&trace_event_mutex);
748 void trace_event_read_unlock(void)
750 up_read(&trace_event_mutex);
754 * register_ftrace_event - register output for an event type
755 * @event: the event type to register
757 * Event types are stored in a hash and this hash is used to
758 * find a way to print an event. If the @event->type is set
759 * then it will use that type, otherwise it will assign a
762 * If you assign your own type, please make sure it is added
763 * to the trace_type enum in trace.h, to avoid collisions
764 * with the dynamic types.
766 * Returns the event type number or zero on error.
768 int register_ftrace_event(struct trace_event *event)
773 down_write(&trace_event_mutex);
778 if (WARN_ON(!event->funcs))
781 INIT_LIST_HEAD(&event->list);
784 struct list_head *list = NULL;
786 if (next_event_type > FTRACE_MAX_EVENT) {
788 event->type = trace_search_list(&list);
794 event->type = next_event_type++;
795 list = &ftrace_event_list;
798 if (WARN_ON(ftrace_find_event(event->type)))
801 list_add_tail(&event->list, list);
803 } else if (event->type > __TRACE_LAST_TYPE) {
804 printk(KERN_WARNING "Need to add type to trace.h\n");
808 /* Is this event already used */
809 if (ftrace_find_event(event->type))
813 if (event->funcs->trace == NULL)
814 event->funcs->trace = trace_nop_print;
815 if (event->funcs->raw == NULL)
816 event->funcs->raw = trace_nop_print;
817 if (event->funcs->hex == NULL)
818 event->funcs->hex = trace_nop_print;
819 if (event->funcs->binary == NULL)
820 event->funcs->binary = trace_nop_print;
822 key = event->type & (EVENT_HASHSIZE - 1);
824 hlist_add_head(&event->node, &event_hash[key]);
828 up_write(&trace_event_mutex);
832 EXPORT_SYMBOL_GPL(register_ftrace_event);
835 * Used by module code with the trace_event_mutex held for write.
837 int __unregister_ftrace_event(struct trace_event *event)
839 hlist_del(&event->node);
840 list_del(&event->list);
845 * unregister_ftrace_event - remove a no longer used event
846 * @event: the event to remove
848 int unregister_ftrace_event(struct trace_event *event)
850 down_write(&trace_event_mutex);
851 __unregister_ftrace_event(event);
852 up_write(&trace_event_mutex);
856 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
862 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
863 struct trace_event *event)
865 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
866 return TRACE_TYPE_PARTIAL_LINE;
868 return TRACE_TYPE_HANDLED;
872 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
873 struct trace_event *event)
875 struct ftrace_entry *field;
876 struct trace_seq *s = &iter->seq;
878 trace_assign_type(field, iter->ent);
880 if (!seq_print_ip_sym(s, field->ip, flags))
883 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
884 if (!trace_seq_printf(s, " <-"))
886 if (!seq_print_ip_sym(s,
891 if (!trace_seq_printf(s, "\n"))
894 return TRACE_TYPE_HANDLED;
897 return TRACE_TYPE_PARTIAL_LINE;
900 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
901 struct trace_event *event)
903 struct ftrace_entry *field;
905 trace_assign_type(field, iter->ent);
907 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
910 return TRACE_TYPE_PARTIAL_LINE;
912 return TRACE_TYPE_HANDLED;
915 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
916 struct trace_event *event)
918 struct ftrace_entry *field;
919 struct trace_seq *s = &iter->seq;
921 trace_assign_type(field, iter->ent);
923 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
924 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
926 return TRACE_TYPE_HANDLED;
929 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
930 struct trace_event *event)
932 struct ftrace_entry *field;
933 struct trace_seq *s = &iter->seq;
935 trace_assign_type(field, iter->ent);
937 SEQ_PUT_FIELD_RET(s, field->ip);
938 SEQ_PUT_FIELD_RET(s, field->parent_ip);
940 return TRACE_TYPE_HANDLED;
943 static struct trace_event_functions trace_fn_funcs = {
944 .trace = trace_fn_trace,
947 .binary = trace_fn_bin,
950 static struct trace_event trace_fn_event = {
952 .funcs = &trace_fn_funcs,
955 /* TRACE_CTX an TRACE_WAKE */
956 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
959 struct ctx_switch_entry *field;
960 char comm[TASK_COMM_LEN];
964 trace_assign_type(field, iter->ent);
966 T = task_state_char(field->next_state);
967 S = task_state_char(field->prev_state);
968 trace_find_cmdline(field->next_pid, comm);
969 if (!trace_seq_printf(&iter->seq,
970 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
978 return TRACE_TYPE_PARTIAL_LINE;
980 return TRACE_TYPE_HANDLED;
983 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
984 struct trace_event *event)
986 return trace_ctxwake_print(iter, "==>");
989 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
990 int flags, struct trace_event *event)
992 return trace_ctxwake_print(iter, " +");
995 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
997 struct ctx_switch_entry *field;
1000 trace_assign_type(field, iter->ent);
1003 S = task_state_char(field->prev_state);
1004 T = task_state_char(field->next_state);
1005 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1013 return TRACE_TYPE_PARTIAL_LINE;
1015 return TRACE_TYPE_HANDLED;
1018 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1019 struct trace_event *event)
1021 return trace_ctxwake_raw(iter, 0);
1024 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1025 struct trace_event *event)
1027 return trace_ctxwake_raw(iter, '+');
1031 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1033 struct ctx_switch_entry *field;
1034 struct trace_seq *s = &iter->seq;
1037 trace_assign_type(field, iter->ent);
1040 S = task_state_char(field->prev_state);
1041 T = task_state_char(field->next_state);
1043 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1044 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1045 SEQ_PUT_HEX_FIELD_RET(s, S);
1046 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1047 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1048 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1049 SEQ_PUT_HEX_FIELD_RET(s, T);
1051 return TRACE_TYPE_HANDLED;
1054 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1055 struct trace_event *event)
1057 return trace_ctxwake_hex(iter, 0);
1060 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1061 struct trace_event *event)
1063 return trace_ctxwake_hex(iter, '+');
1066 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1067 int flags, struct trace_event *event)
1069 struct ctx_switch_entry *field;
1070 struct trace_seq *s = &iter->seq;
1072 trace_assign_type(field, iter->ent);
1074 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1075 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1076 SEQ_PUT_FIELD_RET(s, field->prev_state);
1077 SEQ_PUT_FIELD_RET(s, field->next_pid);
1078 SEQ_PUT_FIELD_RET(s, field->next_prio);
1079 SEQ_PUT_FIELD_RET(s, field->next_state);
1081 return TRACE_TYPE_HANDLED;
1084 static struct trace_event_functions trace_ctx_funcs = {
1085 .trace = trace_ctx_print,
1086 .raw = trace_ctx_raw,
1087 .hex = trace_ctx_hex,
1088 .binary = trace_ctxwake_bin,
1091 static struct trace_event trace_ctx_event = {
1093 .funcs = &trace_ctx_funcs,
1096 static struct trace_event_functions trace_wake_funcs = {
1097 .trace = trace_wake_print,
1098 .raw = trace_wake_raw,
1099 .hex = trace_wake_hex,
1100 .binary = trace_ctxwake_bin,
1103 static struct trace_event trace_wake_event = {
1105 .funcs = &trace_wake_funcs,
1110 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1111 int flags, struct trace_event *event)
1113 struct stack_entry *field;
1114 struct trace_seq *s = &iter->seq;
1118 trace_assign_type(field, iter->ent);
1119 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1121 if (!trace_seq_puts(s, "<stack trace>\n"))
1124 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1125 if (!trace_seq_puts(s, " => "))
1128 if (!seq_print_ip_sym(s, *p, flags))
1130 if (!trace_seq_puts(s, "\n"))
1134 return TRACE_TYPE_HANDLED;
1137 return TRACE_TYPE_PARTIAL_LINE;
1140 static struct trace_event_functions trace_stack_funcs = {
1141 .trace = trace_stack_print,
1144 static struct trace_event trace_stack_event = {
1145 .type = TRACE_STACK,
1146 .funcs = &trace_stack_funcs,
1149 /* TRACE_USER_STACK */
1150 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1151 int flags, struct trace_event *event)
1153 struct userstack_entry *field;
1154 struct trace_seq *s = &iter->seq;
1156 trace_assign_type(field, iter->ent);
1158 if (!trace_seq_puts(s, "<user stack trace>\n"))
1161 if (!seq_print_userip_objs(field, s, flags))
1164 return TRACE_TYPE_HANDLED;
1167 return TRACE_TYPE_PARTIAL_LINE;
1170 static struct trace_event_functions trace_user_stack_funcs = {
1171 .trace = trace_user_stack_print,
1174 static struct trace_event trace_user_stack_event = {
1175 .type = TRACE_USER_STACK,
1176 .funcs = &trace_user_stack_funcs,
1180 static enum print_line_t
1181 trace_bprint_print(struct trace_iterator *iter, int flags,
1182 struct trace_event *event)
1184 struct trace_entry *entry = iter->ent;
1185 struct trace_seq *s = &iter->seq;
1186 struct bprint_entry *field;
1188 trace_assign_type(field, entry);
1190 if (!seq_print_ip_sym(s, field->ip, flags))
1193 if (!trace_seq_puts(s, ": "))
1196 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1199 return TRACE_TYPE_HANDLED;
1202 return TRACE_TYPE_PARTIAL_LINE;
1206 static enum print_line_t
1207 trace_bprint_raw(struct trace_iterator *iter, int flags,
1208 struct trace_event *event)
1210 struct bprint_entry *field;
1211 struct trace_seq *s = &iter->seq;
1213 trace_assign_type(field, iter->ent);
1215 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1218 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1221 return TRACE_TYPE_HANDLED;
1224 return TRACE_TYPE_PARTIAL_LINE;
1227 static struct trace_event_functions trace_bprint_funcs = {
1228 .trace = trace_bprint_print,
1229 .raw = trace_bprint_raw,
1232 static struct trace_event trace_bprint_event = {
1233 .type = TRACE_BPRINT,
1234 .funcs = &trace_bprint_funcs,
1238 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1239 int flags, struct trace_event *event)
1241 struct print_entry *field;
1242 struct trace_seq *s = &iter->seq;
1244 trace_assign_type(field, iter->ent);
1246 if (!seq_print_ip_sym(s, field->ip, flags))
1249 if (!trace_seq_printf(s, ": %s", field->buf))
1252 return TRACE_TYPE_HANDLED;
1255 return TRACE_TYPE_PARTIAL_LINE;
1258 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1259 struct trace_event *event)
1261 struct print_entry *field;
1263 trace_assign_type(field, iter->ent);
1265 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1268 return TRACE_TYPE_HANDLED;
1271 return TRACE_TYPE_PARTIAL_LINE;
1274 static struct trace_event_functions trace_print_funcs = {
1275 .trace = trace_print_print,
1276 .raw = trace_print_raw,
1279 static struct trace_event trace_print_event = {
1280 .type = TRACE_PRINT,
1281 .funcs = &trace_print_funcs,
1285 static struct trace_event *events[] __initdata = {
1290 &trace_user_stack_event,
1291 &trace_bprint_event,
1296 __init static int init_events(void)
1298 struct trace_event *event;
1301 for (i = 0; events[i]; i++) {
1304 ret = register_ftrace_event(event);
1306 printk(KERN_WARNING "event %d failed to register\n",
1314 device_initcall(init_events);