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_sem);
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_bputs_msg_only(struct trace_iterator *iter)
42 struct trace_seq *s = &iter->seq;
43 struct trace_entry *entry = iter->ent;
44 struct bputs_entry *field;
47 trace_assign_type(field, entry);
49 ret = trace_seq_puts(s, field->str);
51 return TRACE_TYPE_PARTIAL_LINE;
53 return TRACE_TYPE_HANDLED;
56 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
58 struct trace_seq *s = &iter->seq;
59 struct trace_entry *entry = iter->ent;
60 struct bprint_entry *field;
63 trace_assign_type(field, entry);
65 ret = trace_seq_bprintf(s, field->fmt, field->buf);
67 return TRACE_TYPE_PARTIAL_LINE;
69 return TRACE_TYPE_HANDLED;
72 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
74 struct trace_seq *s = &iter->seq;
75 struct trace_entry *entry = iter->ent;
76 struct print_entry *field;
79 trace_assign_type(field, entry);
81 ret = trace_seq_printf(s, "%s", field->buf);
83 return TRACE_TYPE_PARTIAL_LINE;
85 return TRACE_TYPE_HANDLED;
89 * trace_seq_printf - sequence printing of trace information
90 * @s: trace sequence descriptor
91 * @fmt: printf format string
93 * It returns 0 if the trace oversizes the buffer's free
96 * The tracer may use either sequence operations or its own
97 * copy to user routines. To simplify formating of a trace
98 * trace_seq_printf is used to store strings into a special
99 * buffer (@s). Then the output may be either used by
100 * the sequencer or pulled into another buffer.
103 trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
105 int len = (PAGE_SIZE - 1) - s->len;
113 ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
116 /* If we can't write it all, don't bother writing anything */
126 EXPORT_SYMBOL_GPL(trace_seq_printf);
129 * trace_seq_vprintf - sequence printing of trace information
130 * @s: trace sequence descriptor
131 * @fmt: printf format string
133 * The tracer may use either sequence operations or its own
134 * copy to user routines. To simplify formating of a trace
135 * trace_seq_printf is used to store strings into a special
136 * buffer (@s). Then the output may be either used by
137 * the sequencer or pulled into another buffer.
140 trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
142 int len = (PAGE_SIZE - 1) - s->len;
148 ret = vsnprintf(s->buffer + s->len, len, fmt, args);
150 /* If we can't write it all, don't bother writing anything */
160 EXPORT_SYMBOL_GPL(trace_seq_vprintf);
162 int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
164 int len = (PAGE_SIZE - 1) - s->len;
170 ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
172 /* If we can't write it all, don't bother writing anything */
184 * trace_seq_puts - trace sequence printing of simple string
185 * @s: trace sequence descriptor
186 * @str: simple string to record
188 * The tracer may use either the sequence operations or its own
189 * copy to user routines. This function records a simple string
190 * into a special buffer (@s) for later retrieval by a sequencer
191 * or other mechanism.
193 int trace_seq_puts(struct trace_seq *s, const char *str)
195 int len = strlen(str);
200 if (len > ((PAGE_SIZE - 1) - s->len)) {
205 memcpy(s->buffer + s->len, str, len);
211 int trace_seq_putc(struct trace_seq *s, unsigned char c)
216 if (s->len >= (PAGE_SIZE - 1)) {
221 s->buffer[s->len++] = c;
225 EXPORT_SYMBOL(trace_seq_putc);
227 int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
232 if (len > ((PAGE_SIZE - 1) - s->len)) {
237 memcpy(s->buffer + s->len, mem, len);
243 int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
245 unsigned char hex[HEX_CHARS];
246 const unsigned char *data = mem;
253 for (i = 0, j = 0; i < len; i++) {
255 for (i = len-1, j = 0; i >= 0; i--) {
257 hex[j++] = hex_asc_hi(data[i]);
258 hex[j++] = hex_asc_lo(data[i]);
262 return trace_seq_putmem(s, hex, j);
265 void *trace_seq_reserve(struct trace_seq *s, size_t len)
272 if (len > ((PAGE_SIZE - 1) - s->len)) {
277 ret = s->buffer + s->len;
283 int trace_seq_path(struct trace_seq *s, const struct path *path)
290 if (s->len >= (PAGE_SIZE - 1)) {
295 p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
297 p = mangle_path(s->buffer + s->len, p, "\n");
299 s->len = p - s->buffer;
303 s->buffer[s->len++] = '?';
312 ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
314 const struct trace_print_flags *flag_array)
318 const char *ret = p->buffer + p->len;
321 for (i = 0; flag_array[i].name && flags; i++) {
323 mask = flag_array[i].mask;
324 if ((flags & mask) != mask)
327 str = flag_array[i].name;
330 trace_seq_puts(p, delim);
333 trace_seq_puts(p, str);
336 /* check for left over flags */
339 trace_seq_puts(p, delim);
340 trace_seq_printf(p, "0x%lx", flags);
343 trace_seq_putc(p, 0);
347 EXPORT_SYMBOL(ftrace_print_flags_seq);
350 ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
351 const struct trace_print_flags *symbol_array)
354 const char *ret = p->buffer + p->len;
356 for (i = 0; symbol_array[i].name; i++) {
358 if (val != symbol_array[i].mask)
361 trace_seq_puts(p, symbol_array[i].name);
365 if (ret == (const char *)(p->buffer + p->len))
366 trace_seq_printf(p, "0x%lx", val);
368 trace_seq_putc(p, 0);
372 EXPORT_SYMBOL(ftrace_print_symbols_seq);
374 #if BITS_PER_LONG == 32
376 ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
377 const struct trace_print_flags_u64 *symbol_array)
380 const char *ret = p->buffer + p->len;
382 for (i = 0; symbol_array[i].name; i++) {
384 if (val != symbol_array[i].mask)
387 trace_seq_puts(p, symbol_array[i].name);
391 if (ret == (const char *)(p->buffer + p->len))
392 trace_seq_printf(p, "0x%llx", val);
394 trace_seq_putc(p, 0);
398 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
402 ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
405 const char *ret = p->buffer + p->len;
407 for (i = 0; i < buf_len; i++)
408 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
410 trace_seq_putc(p, 0);
414 EXPORT_SYMBOL(ftrace_print_hex_seq);
416 int ftrace_raw_output_prep(struct trace_iterator *iter,
417 struct trace_event *trace_event)
419 struct ftrace_event_call *event;
420 struct trace_seq *s = &iter->seq;
421 struct trace_seq *p = &iter->tmp_seq;
422 struct trace_entry *entry;
425 event = container_of(trace_event, struct ftrace_event_call, event);
428 if (entry->type != event->event.type) {
430 return TRACE_TYPE_UNHANDLED;
434 ret = trace_seq_printf(s, "%s: ", event->name);
436 return TRACE_TYPE_PARTIAL_LINE;
440 EXPORT_SYMBOL(ftrace_raw_output_prep);
442 #ifdef CONFIG_KRETPROBES
443 static inline const char *kretprobed(const char *name)
445 static const char tramp_name[] = "kretprobe_trampoline";
446 int size = sizeof(tramp_name);
448 if (strncmp(tramp_name, name, size) == 0)
449 return "[unknown/kretprobe'd]";
453 static inline const char *kretprobed(const char *name)
457 #endif /* CONFIG_KRETPROBES */
460 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
462 #ifdef CONFIG_KALLSYMS
463 char str[KSYM_SYMBOL_LEN];
466 kallsyms_lookup(address, NULL, NULL, NULL, str);
468 name = kretprobed(str);
470 return trace_seq_printf(s, fmt, name);
476 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
477 unsigned long address)
479 #ifdef CONFIG_KALLSYMS
480 char str[KSYM_SYMBOL_LEN];
483 sprint_symbol(str, address);
484 name = kretprobed(str);
486 return trace_seq_printf(s, fmt, name);
492 # define IP_FMT "%08lx"
494 # define IP_FMT "%016lx"
497 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
498 unsigned long ip, unsigned long sym_flags)
500 struct file *file = NULL;
501 unsigned long vmstart = 0;
508 const struct vm_area_struct *vma;
510 down_read(&mm->mmap_sem);
511 vma = find_vma(mm, ip);
514 vmstart = vma->vm_start;
517 ret = trace_seq_path(s, &file->f_path);
519 ret = trace_seq_printf(s, "[+0x%lx]",
522 up_read(&mm->mmap_sem);
524 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
525 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
530 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
531 unsigned long sym_flags)
533 struct mm_struct *mm = NULL;
537 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
538 struct task_struct *task;
540 * we do the lookup on the thread group leader,
541 * since individual threads might have already quit!
544 task = find_task_by_vpid(entry->tgid);
546 mm = get_task_mm(task);
550 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
551 unsigned long ip = entry->caller[i];
553 if (ip == ULONG_MAX || !ret)
556 ret = trace_seq_puts(s, " => ");
559 ret = trace_seq_puts(s, "??");
561 ret = trace_seq_puts(s, "\n");
567 ret = seq_print_user_ip(s, mm, ip, sym_flags);
568 ret = trace_seq_puts(s, "\n");
577 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
582 return trace_seq_printf(s, "0");
584 if (sym_flags & TRACE_ITER_SYM_OFFSET)
585 ret = seq_print_sym_offset(s, "%s", ip);
587 ret = seq_print_sym_short(s, "%s", ip);
592 if (sym_flags & TRACE_ITER_SYM_ADDR)
593 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
598 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
599 * @s: trace seq struct to write to
600 * @entry: The trace entry field from the ring buffer
602 * Prints the generic fields of irqs off, in hard or softirq, preempt
605 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
614 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
615 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
618 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
619 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
622 (entry->flags & TRACE_FLAG_NEED_RESCHED) ? 'N' : '.';
624 (hardirq && softirq) ? 'H' :
629 if (!trace_seq_printf(s, "%c%c%c",
630 irqs_off, need_resched, hardsoft_irq))
633 if (entry->preempt_count)
634 ret = trace_seq_printf(s, "%x", entry->preempt_count);
636 ret = trace_seq_putc(s, '.');
642 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
644 char comm[TASK_COMM_LEN];
646 trace_find_cmdline(entry->pid, comm);
648 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
649 comm, entry->pid, cpu))
652 return trace_print_lat_fmt(s, entry);
655 static unsigned long preempt_mark_thresh_us = 100;
658 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
660 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
661 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
662 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
663 unsigned long long rel_ts = next_ts - iter->ts;
664 struct trace_seq *s = &iter->seq;
667 abs_ts = ns2usecs(abs_ts);
668 rel_ts = ns2usecs(rel_ts);
671 if (verbose && in_ns) {
672 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
673 unsigned long abs_msec = (unsigned long)abs_ts;
674 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
675 unsigned long rel_msec = (unsigned long)rel_ts;
677 return trace_seq_printf(
678 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
682 } else if (verbose && !in_ns) {
683 return trace_seq_printf(
684 s, "[%016llx] %lld (+%lld): ",
685 iter->ts, abs_ts, rel_ts);
686 } else if (!verbose && in_ns) {
687 return trace_seq_printf(
690 rel_ts > preempt_mark_thresh_us ? '!' :
691 rel_ts > 1 ? '+' : ' ');
692 } else { /* !verbose && !in_ns */
693 return trace_seq_printf(s, " %4lld: ", abs_ts);
697 int trace_print_context(struct trace_iterator *iter)
699 struct trace_seq *s = &iter->seq;
700 struct trace_entry *entry = iter->ent;
701 unsigned long long t;
702 unsigned long secs, usec_rem;
703 char comm[TASK_COMM_LEN];
706 trace_find_cmdline(entry->pid, comm);
708 ret = trace_seq_printf(s, "%16s-%-5d [%03d] ",
709 comm, entry->pid, iter->cpu);
713 if (trace_flags & TRACE_ITER_IRQ_INFO) {
714 ret = trace_print_lat_fmt(s, entry);
719 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
720 t = ns2usecs(iter->ts);
721 usec_rem = do_div(t, USEC_PER_SEC);
722 secs = (unsigned long)t;
723 return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
725 return trace_seq_printf(s, " %12llu: ", iter->ts);
728 int trace_print_lat_context(struct trace_iterator *iter)
732 /* trace_find_next_entry will reset ent_size */
733 int ent_size = iter->ent_size;
734 struct trace_seq *s = &iter->seq;
735 struct trace_entry *entry = iter->ent,
736 *next_entry = trace_find_next_entry(iter, NULL,
738 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
740 /* Restore the original ent_size */
741 iter->ent_size = ent_size;
747 char comm[TASK_COMM_LEN];
749 trace_find_cmdline(entry->pid, comm);
751 ret = trace_seq_printf(
752 s, "%16s %5d %3d %d %08x %08lx ",
753 comm, entry->pid, iter->cpu, entry->flags,
754 entry->preempt_count, iter->idx);
756 ret = lat_print_generic(s, entry, iter->cpu);
760 ret = lat_print_timestamp(iter, next_ts);
765 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
767 static int task_state_char(unsigned long state)
769 int bit = state ? __ffs(state) + 1 : 0;
771 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
775 * ftrace_find_event - find a registered event
776 * @type: the type of event to look for
778 * Returns an event of type @type otherwise NULL
779 * Called with trace_event_read_lock() held.
781 struct trace_event *ftrace_find_event(int type)
783 struct trace_event *event;
786 key = type & (EVENT_HASHSIZE - 1);
788 hlist_for_each_entry(event, &event_hash[key], node) {
789 if (event->type == type)
796 static LIST_HEAD(ftrace_event_list);
798 static int trace_search_list(struct list_head **list)
800 struct trace_event *e;
801 int last = __TRACE_LAST_TYPE;
803 if (list_empty(&ftrace_event_list)) {
804 *list = &ftrace_event_list;
809 * We used up all possible max events,
810 * lets see if somebody freed one.
812 list_for_each_entry(e, &ftrace_event_list, list) {
813 if (e->type != last + 1)
818 /* Did we used up all 65 thousand events??? */
819 if ((last + 1) > FTRACE_MAX_EVENT)
826 void trace_event_read_lock(void)
828 down_read(&trace_event_sem);
831 void trace_event_read_unlock(void)
833 up_read(&trace_event_sem);
837 * register_ftrace_event - register output for an event type
838 * @event: the event type to register
840 * Event types are stored in a hash and this hash is used to
841 * find a way to print an event. If the @event->type is set
842 * then it will use that type, otherwise it will assign a
845 * If you assign your own type, please make sure it is added
846 * to the trace_type enum in trace.h, to avoid collisions
847 * with the dynamic types.
849 * Returns the event type number or zero on error.
851 int register_ftrace_event(struct trace_event *event)
856 down_write(&trace_event_sem);
861 if (WARN_ON(!event->funcs))
864 INIT_LIST_HEAD(&event->list);
867 struct list_head *list = NULL;
869 if (next_event_type > FTRACE_MAX_EVENT) {
871 event->type = trace_search_list(&list);
877 event->type = next_event_type++;
878 list = &ftrace_event_list;
881 if (WARN_ON(ftrace_find_event(event->type)))
884 list_add_tail(&event->list, list);
886 } else if (event->type > __TRACE_LAST_TYPE) {
887 printk(KERN_WARNING "Need to add type to trace.h\n");
891 /* Is this event already used */
892 if (ftrace_find_event(event->type))
896 if (event->funcs->trace == NULL)
897 event->funcs->trace = trace_nop_print;
898 if (event->funcs->raw == NULL)
899 event->funcs->raw = trace_nop_print;
900 if (event->funcs->hex == NULL)
901 event->funcs->hex = trace_nop_print;
902 if (event->funcs->binary == NULL)
903 event->funcs->binary = trace_nop_print;
905 key = event->type & (EVENT_HASHSIZE - 1);
907 hlist_add_head(&event->node, &event_hash[key]);
911 up_write(&trace_event_sem);
915 EXPORT_SYMBOL_GPL(register_ftrace_event);
918 * Used by module code with the trace_event_sem held for write.
920 int __unregister_ftrace_event(struct trace_event *event)
922 hlist_del(&event->node);
923 list_del(&event->list);
928 * unregister_ftrace_event - remove a no longer used event
929 * @event: the event to remove
931 int unregister_ftrace_event(struct trace_event *event)
933 down_write(&trace_event_sem);
934 __unregister_ftrace_event(event);
935 up_write(&trace_event_sem);
939 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
945 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
946 struct trace_event *event)
948 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
949 return TRACE_TYPE_PARTIAL_LINE;
951 return TRACE_TYPE_HANDLED;
955 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
956 struct trace_event *event)
958 struct ftrace_entry *field;
959 struct trace_seq *s = &iter->seq;
961 trace_assign_type(field, iter->ent);
963 if (!seq_print_ip_sym(s, field->ip, flags))
966 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
967 if (!trace_seq_printf(s, " <-"))
969 if (!seq_print_ip_sym(s,
974 if (!trace_seq_printf(s, "\n"))
977 return TRACE_TYPE_HANDLED;
980 return TRACE_TYPE_PARTIAL_LINE;
983 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
984 struct trace_event *event)
986 struct ftrace_entry *field;
988 trace_assign_type(field, iter->ent);
990 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
993 return TRACE_TYPE_PARTIAL_LINE;
995 return TRACE_TYPE_HANDLED;
998 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
999 struct trace_event *event)
1001 struct ftrace_entry *field;
1002 struct trace_seq *s = &iter->seq;
1004 trace_assign_type(field, iter->ent);
1006 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
1007 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
1009 return TRACE_TYPE_HANDLED;
1012 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
1013 struct trace_event *event)
1015 struct ftrace_entry *field;
1016 struct trace_seq *s = &iter->seq;
1018 trace_assign_type(field, iter->ent);
1020 SEQ_PUT_FIELD_RET(s, field->ip);
1021 SEQ_PUT_FIELD_RET(s, field->parent_ip);
1023 return TRACE_TYPE_HANDLED;
1026 static struct trace_event_functions trace_fn_funcs = {
1027 .trace = trace_fn_trace,
1028 .raw = trace_fn_raw,
1029 .hex = trace_fn_hex,
1030 .binary = trace_fn_bin,
1033 static struct trace_event trace_fn_event = {
1035 .funcs = &trace_fn_funcs,
1038 /* TRACE_CTX an TRACE_WAKE */
1039 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1042 struct ctx_switch_entry *field;
1043 char comm[TASK_COMM_LEN];
1047 trace_assign_type(field, iter->ent);
1049 T = task_state_char(field->next_state);
1050 S = task_state_char(field->prev_state);
1051 trace_find_cmdline(field->next_pid, comm);
1052 if (!trace_seq_printf(&iter->seq,
1053 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1061 return TRACE_TYPE_PARTIAL_LINE;
1063 return TRACE_TYPE_HANDLED;
1066 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1067 struct trace_event *event)
1069 return trace_ctxwake_print(iter, "==>");
1072 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1073 int flags, struct trace_event *event)
1075 return trace_ctxwake_print(iter, " +");
1078 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1080 struct ctx_switch_entry *field;
1083 trace_assign_type(field, iter->ent);
1086 S = task_state_char(field->prev_state);
1087 T = task_state_char(field->next_state);
1088 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1096 return TRACE_TYPE_PARTIAL_LINE;
1098 return TRACE_TYPE_HANDLED;
1101 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1102 struct trace_event *event)
1104 return trace_ctxwake_raw(iter, 0);
1107 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1108 struct trace_event *event)
1110 return trace_ctxwake_raw(iter, '+');
1114 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1116 struct ctx_switch_entry *field;
1117 struct trace_seq *s = &iter->seq;
1120 trace_assign_type(field, iter->ent);
1123 S = task_state_char(field->prev_state);
1124 T = task_state_char(field->next_state);
1126 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1127 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1128 SEQ_PUT_HEX_FIELD_RET(s, S);
1129 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1130 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1131 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1132 SEQ_PUT_HEX_FIELD_RET(s, T);
1134 return TRACE_TYPE_HANDLED;
1137 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1138 struct trace_event *event)
1140 return trace_ctxwake_hex(iter, 0);
1143 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1144 struct trace_event *event)
1146 return trace_ctxwake_hex(iter, '+');
1149 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1150 int flags, struct trace_event *event)
1152 struct ctx_switch_entry *field;
1153 struct trace_seq *s = &iter->seq;
1155 trace_assign_type(field, iter->ent);
1157 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1158 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1159 SEQ_PUT_FIELD_RET(s, field->prev_state);
1160 SEQ_PUT_FIELD_RET(s, field->next_pid);
1161 SEQ_PUT_FIELD_RET(s, field->next_prio);
1162 SEQ_PUT_FIELD_RET(s, field->next_state);
1164 return TRACE_TYPE_HANDLED;
1167 static struct trace_event_functions trace_ctx_funcs = {
1168 .trace = trace_ctx_print,
1169 .raw = trace_ctx_raw,
1170 .hex = trace_ctx_hex,
1171 .binary = trace_ctxwake_bin,
1174 static struct trace_event trace_ctx_event = {
1176 .funcs = &trace_ctx_funcs,
1179 static struct trace_event_functions trace_wake_funcs = {
1180 .trace = trace_wake_print,
1181 .raw = trace_wake_raw,
1182 .hex = trace_wake_hex,
1183 .binary = trace_ctxwake_bin,
1186 static struct trace_event trace_wake_event = {
1188 .funcs = &trace_wake_funcs,
1193 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1194 int flags, struct trace_event *event)
1196 struct stack_entry *field;
1197 struct trace_seq *s = &iter->seq;
1201 trace_assign_type(field, iter->ent);
1202 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1204 if (!trace_seq_puts(s, "<stack trace>\n"))
1207 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1208 if (!trace_seq_puts(s, " => "))
1211 if (!seq_print_ip_sym(s, *p, flags))
1213 if (!trace_seq_puts(s, "\n"))
1217 return TRACE_TYPE_HANDLED;
1220 return TRACE_TYPE_PARTIAL_LINE;
1223 static struct trace_event_functions trace_stack_funcs = {
1224 .trace = trace_stack_print,
1227 static struct trace_event trace_stack_event = {
1228 .type = TRACE_STACK,
1229 .funcs = &trace_stack_funcs,
1232 /* TRACE_USER_STACK */
1233 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1234 int flags, struct trace_event *event)
1236 struct userstack_entry *field;
1237 struct trace_seq *s = &iter->seq;
1239 trace_assign_type(field, iter->ent);
1241 if (!trace_seq_puts(s, "<user stack trace>\n"))
1244 if (!seq_print_userip_objs(field, s, flags))
1247 return TRACE_TYPE_HANDLED;
1250 return TRACE_TYPE_PARTIAL_LINE;
1253 static struct trace_event_functions trace_user_stack_funcs = {
1254 .trace = trace_user_stack_print,
1257 static struct trace_event trace_user_stack_event = {
1258 .type = TRACE_USER_STACK,
1259 .funcs = &trace_user_stack_funcs,
1263 static enum print_line_t
1264 trace_bputs_print(struct trace_iterator *iter, int flags,
1265 struct trace_event *event)
1267 struct trace_entry *entry = iter->ent;
1268 struct trace_seq *s = &iter->seq;
1269 struct bputs_entry *field;
1271 trace_assign_type(field, entry);
1273 if (!seq_print_ip_sym(s, field->ip, flags))
1276 if (!trace_seq_puts(s, ": "))
1279 if (!trace_seq_puts(s, field->str))
1282 return TRACE_TYPE_HANDLED;
1285 return TRACE_TYPE_PARTIAL_LINE;
1289 static enum print_line_t
1290 trace_bputs_raw(struct trace_iterator *iter, int flags,
1291 struct trace_event *event)
1293 struct bputs_entry *field;
1294 struct trace_seq *s = &iter->seq;
1296 trace_assign_type(field, iter->ent);
1298 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1301 if (!trace_seq_puts(s, field->str))
1304 return TRACE_TYPE_HANDLED;
1307 return TRACE_TYPE_PARTIAL_LINE;
1310 static struct trace_event_functions trace_bputs_funcs = {
1311 .trace = trace_bputs_print,
1312 .raw = trace_bputs_raw,
1315 static struct trace_event trace_bputs_event = {
1316 .type = TRACE_BPUTS,
1317 .funcs = &trace_bputs_funcs,
1321 static enum print_line_t
1322 trace_bprint_print(struct trace_iterator *iter, int flags,
1323 struct trace_event *event)
1325 struct trace_entry *entry = iter->ent;
1326 struct trace_seq *s = &iter->seq;
1327 struct bprint_entry *field;
1329 trace_assign_type(field, entry);
1331 if (!seq_print_ip_sym(s, field->ip, flags))
1334 if (!trace_seq_puts(s, ": "))
1337 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1340 return TRACE_TYPE_HANDLED;
1343 return TRACE_TYPE_PARTIAL_LINE;
1347 static enum print_line_t
1348 trace_bprint_raw(struct trace_iterator *iter, int flags,
1349 struct trace_event *event)
1351 struct bprint_entry *field;
1352 struct trace_seq *s = &iter->seq;
1354 trace_assign_type(field, iter->ent);
1356 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1359 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1362 return TRACE_TYPE_HANDLED;
1365 return TRACE_TYPE_PARTIAL_LINE;
1368 static struct trace_event_functions trace_bprint_funcs = {
1369 .trace = trace_bprint_print,
1370 .raw = trace_bprint_raw,
1373 static struct trace_event trace_bprint_event = {
1374 .type = TRACE_BPRINT,
1375 .funcs = &trace_bprint_funcs,
1379 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1380 int flags, struct trace_event *event)
1382 struct print_entry *field;
1383 struct trace_seq *s = &iter->seq;
1385 trace_assign_type(field, iter->ent);
1387 if (!seq_print_ip_sym(s, field->ip, flags))
1390 if (!trace_seq_printf(s, ": %s", field->buf))
1393 return TRACE_TYPE_HANDLED;
1396 return TRACE_TYPE_PARTIAL_LINE;
1399 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1400 struct trace_event *event)
1402 struct print_entry *field;
1404 trace_assign_type(field, iter->ent);
1406 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1409 return TRACE_TYPE_HANDLED;
1412 return TRACE_TYPE_PARTIAL_LINE;
1415 static struct trace_event_functions trace_print_funcs = {
1416 .trace = trace_print_print,
1417 .raw = trace_print_raw,
1420 static struct trace_event trace_print_event = {
1421 .type = TRACE_PRINT,
1422 .funcs = &trace_print_funcs,
1426 static struct trace_event *events[] __initdata = {
1431 &trace_user_stack_event,
1433 &trace_bprint_event,
1438 __init static int init_events(void)
1440 struct trace_event *event;
1443 for (i = 0; events[i]; i++) {
1446 ret = register_ftrace_event(event);
1448 printk(KERN_WARNING "event %d failed to register\n",
1456 early_initcall(init_events);