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_puts(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 static int ftrace_output_raw(struct trace_iterator *iter, char *name,
443 char *fmt, va_list ap)
445 struct trace_seq *s = &iter->seq;
448 ret = trace_seq_printf(s, "%s: ", name);
450 return TRACE_TYPE_PARTIAL_LINE;
452 ret = trace_seq_vprintf(s, fmt, ap);
455 return TRACE_TYPE_PARTIAL_LINE;
457 return TRACE_TYPE_HANDLED;
460 int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
466 ret = ftrace_output_raw(iter, name, fmt, ap);
471 EXPORT_SYMBOL_GPL(ftrace_output_call);
473 #ifdef CONFIG_KRETPROBES
474 static inline const char *kretprobed(const char *name)
476 static const char tramp_name[] = "kretprobe_trampoline";
477 int size = sizeof(tramp_name);
479 if (strncmp(tramp_name, name, size) == 0)
480 return "[unknown/kretprobe'd]";
484 static inline const char *kretprobed(const char *name)
488 #endif /* CONFIG_KRETPROBES */
491 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
493 #ifdef CONFIG_KALLSYMS
494 char str[KSYM_SYMBOL_LEN];
497 kallsyms_lookup(address, NULL, NULL, NULL, str);
499 name = kretprobed(str);
501 return trace_seq_printf(s, fmt, name);
507 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
508 unsigned long address)
510 #ifdef CONFIG_KALLSYMS
511 char str[KSYM_SYMBOL_LEN];
514 sprint_symbol(str, address);
515 name = kretprobed(str);
517 return trace_seq_printf(s, fmt, name);
523 # define IP_FMT "%08lx"
525 # define IP_FMT "%016lx"
528 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
529 unsigned long ip, unsigned long sym_flags)
531 struct file *file = NULL;
532 unsigned long vmstart = 0;
539 const struct vm_area_struct *vma;
541 down_read(&mm->mmap_sem);
542 vma = find_vma(mm, ip);
545 vmstart = vma->vm_start;
548 ret = trace_seq_path(s, &file->f_path);
550 ret = trace_seq_printf(s, "[+0x%lx]",
553 up_read(&mm->mmap_sem);
555 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
556 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
561 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
562 unsigned long sym_flags)
564 struct mm_struct *mm = NULL;
568 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
569 struct task_struct *task;
571 * we do the lookup on the thread group leader,
572 * since individual threads might have already quit!
575 task = find_task_by_vpid(entry->tgid);
577 mm = get_task_mm(task);
581 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
582 unsigned long ip = entry->caller[i];
584 if (ip == ULONG_MAX || !ret)
587 ret = trace_seq_puts(s, " => ");
590 ret = trace_seq_puts(s, "??");
592 ret = trace_seq_putc(s, '\n');
598 ret = seq_print_user_ip(s, mm, ip, sym_flags);
599 ret = trace_seq_putc(s, '\n');
608 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
613 return trace_seq_putc(s, '0');
615 if (sym_flags & TRACE_ITER_SYM_OFFSET)
616 ret = seq_print_sym_offset(s, "%s", ip);
618 ret = seq_print_sym_short(s, "%s", ip);
623 if (sym_flags & TRACE_ITER_SYM_ADDR)
624 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
629 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
630 * @s: trace seq struct to write to
631 * @entry: The trace entry field from the ring buffer
633 * Prints the generic fields of irqs off, in hard or softirq, preempt
636 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
645 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
646 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
649 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
650 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
653 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
654 TRACE_FLAG_PREEMPT_RESCHED)) {
655 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
658 case TRACE_FLAG_NEED_RESCHED:
661 case TRACE_FLAG_PREEMPT_RESCHED:
670 (hardirq && softirq) ? 'H' :
675 if (!trace_seq_printf(s, "%c%c%c",
676 irqs_off, need_resched, hardsoft_irq))
679 if (entry->preempt_count)
680 ret = trace_seq_printf(s, "%x", entry->preempt_count);
682 ret = trace_seq_putc(s, '.');
688 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
690 char comm[TASK_COMM_LEN];
692 trace_find_cmdline(entry->pid, comm);
694 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
695 comm, entry->pid, cpu))
698 return trace_print_lat_fmt(s, entry);
701 static unsigned long preempt_mark_thresh_us = 100;
704 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
706 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
707 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
708 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
709 unsigned long long rel_ts = next_ts - iter->ts;
710 struct trace_seq *s = &iter->seq;
713 abs_ts = ns2usecs(abs_ts);
714 rel_ts = ns2usecs(rel_ts);
717 if (verbose && in_ns) {
718 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
719 unsigned long abs_msec = (unsigned long)abs_ts;
720 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
721 unsigned long rel_msec = (unsigned long)rel_ts;
723 return trace_seq_printf(
724 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
728 } else if (verbose && !in_ns) {
729 return trace_seq_printf(
730 s, "[%016llx] %lld (+%lld): ",
731 iter->ts, abs_ts, rel_ts);
732 } else if (!verbose && in_ns) {
733 return trace_seq_printf(
736 rel_ts > preempt_mark_thresh_us ? '!' :
737 rel_ts > 1 ? '+' : ' ');
738 } else { /* !verbose && !in_ns */
739 return trace_seq_printf(s, " %4lld: ", abs_ts);
743 int trace_print_context(struct trace_iterator *iter)
745 struct trace_seq *s = &iter->seq;
746 struct trace_entry *entry = iter->ent;
747 unsigned long long t;
748 unsigned long secs, usec_rem;
749 char comm[TASK_COMM_LEN];
752 trace_find_cmdline(entry->pid, comm);
754 ret = trace_seq_printf(s, "%16s-%-5d [%03d] ",
755 comm, entry->pid, iter->cpu);
759 if (trace_flags & TRACE_ITER_IRQ_INFO) {
760 ret = trace_print_lat_fmt(s, entry);
765 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
766 t = ns2usecs(iter->ts);
767 usec_rem = do_div(t, USEC_PER_SEC);
768 secs = (unsigned long)t;
769 return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
771 return trace_seq_printf(s, " %12llu: ", iter->ts);
774 int trace_print_lat_context(struct trace_iterator *iter)
778 /* trace_find_next_entry will reset ent_size */
779 int ent_size = iter->ent_size;
780 struct trace_seq *s = &iter->seq;
781 struct trace_entry *entry = iter->ent,
782 *next_entry = trace_find_next_entry(iter, NULL,
784 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
786 /* Restore the original ent_size */
787 iter->ent_size = ent_size;
793 char comm[TASK_COMM_LEN];
795 trace_find_cmdline(entry->pid, comm);
797 ret = trace_seq_printf(
798 s, "%16s %5d %3d %d %08x %08lx ",
799 comm, entry->pid, iter->cpu, entry->flags,
800 entry->preempt_count, iter->idx);
802 ret = lat_print_generic(s, entry, iter->cpu);
806 ret = lat_print_timestamp(iter, next_ts);
811 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
813 static int task_state_char(unsigned long state)
815 int bit = state ? __ffs(state) + 1 : 0;
817 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
821 * ftrace_find_event - find a registered event
822 * @type: the type of event to look for
824 * Returns an event of type @type otherwise NULL
825 * Called with trace_event_read_lock() held.
827 struct trace_event *ftrace_find_event(int type)
829 struct trace_event *event;
832 key = type & (EVENT_HASHSIZE - 1);
834 hlist_for_each_entry(event, &event_hash[key], node) {
835 if (event->type == type)
842 static LIST_HEAD(ftrace_event_list);
844 static int trace_search_list(struct list_head **list)
846 struct trace_event *e;
847 int last = __TRACE_LAST_TYPE;
849 if (list_empty(&ftrace_event_list)) {
850 *list = &ftrace_event_list;
855 * We used up all possible max events,
856 * lets see if somebody freed one.
858 list_for_each_entry(e, &ftrace_event_list, list) {
859 if (e->type != last + 1)
864 /* Did we used up all 65 thousand events??? */
865 if ((last + 1) > FTRACE_MAX_EVENT)
872 void trace_event_read_lock(void)
874 down_read(&trace_event_sem);
877 void trace_event_read_unlock(void)
879 up_read(&trace_event_sem);
883 * register_ftrace_event - register output for an event type
884 * @event: the event type to register
886 * Event types are stored in a hash and this hash is used to
887 * find a way to print an event. If the @event->type is set
888 * then it will use that type, otherwise it will assign a
891 * If you assign your own type, please make sure it is added
892 * to the trace_type enum in trace.h, to avoid collisions
893 * with the dynamic types.
895 * Returns the event type number or zero on error.
897 int register_ftrace_event(struct trace_event *event)
902 down_write(&trace_event_sem);
907 if (WARN_ON(!event->funcs))
910 INIT_LIST_HEAD(&event->list);
913 struct list_head *list = NULL;
915 if (next_event_type > FTRACE_MAX_EVENT) {
917 event->type = trace_search_list(&list);
923 event->type = next_event_type++;
924 list = &ftrace_event_list;
927 if (WARN_ON(ftrace_find_event(event->type)))
930 list_add_tail(&event->list, list);
932 } else if (event->type > __TRACE_LAST_TYPE) {
933 printk(KERN_WARNING "Need to add type to trace.h\n");
937 /* Is this event already used */
938 if (ftrace_find_event(event->type))
942 if (event->funcs->trace == NULL)
943 event->funcs->trace = trace_nop_print;
944 if (event->funcs->raw == NULL)
945 event->funcs->raw = trace_nop_print;
946 if (event->funcs->hex == NULL)
947 event->funcs->hex = trace_nop_print;
948 if (event->funcs->binary == NULL)
949 event->funcs->binary = trace_nop_print;
951 key = event->type & (EVENT_HASHSIZE - 1);
953 hlist_add_head(&event->node, &event_hash[key]);
957 up_write(&trace_event_sem);
961 EXPORT_SYMBOL_GPL(register_ftrace_event);
964 * Used by module code with the trace_event_sem held for write.
966 int __unregister_ftrace_event(struct trace_event *event)
968 hlist_del(&event->node);
969 list_del(&event->list);
974 * unregister_ftrace_event - remove a no longer used event
975 * @event: the event to remove
977 int unregister_ftrace_event(struct trace_event *event)
979 down_write(&trace_event_sem);
980 __unregister_ftrace_event(event);
981 up_write(&trace_event_sem);
985 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
991 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
992 struct trace_event *event)
994 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
995 return TRACE_TYPE_PARTIAL_LINE;
997 return TRACE_TYPE_HANDLED;
1001 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
1002 struct trace_event *event)
1004 struct ftrace_entry *field;
1005 struct trace_seq *s = &iter->seq;
1007 trace_assign_type(field, iter->ent);
1009 if (!seq_print_ip_sym(s, field->ip, flags))
1012 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
1013 if (!trace_seq_puts(s, " <-"))
1015 if (!seq_print_ip_sym(s,
1020 if (!trace_seq_putc(s, '\n'))
1023 return TRACE_TYPE_HANDLED;
1026 return TRACE_TYPE_PARTIAL_LINE;
1029 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
1030 struct trace_event *event)
1032 struct ftrace_entry *field;
1034 trace_assign_type(field, iter->ent);
1036 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
1039 return TRACE_TYPE_PARTIAL_LINE;
1041 return TRACE_TYPE_HANDLED;
1044 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
1045 struct trace_event *event)
1047 struct ftrace_entry *field;
1048 struct trace_seq *s = &iter->seq;
1050 trace_assign_type(field, iter->ent);
1052 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
1053 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
1055 return TRACE_TYPE_HANDLED;
1058 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
1059 struct trace_event *event)
1061 struct ftrace_entry *field;
1062 struct trace_seq *s = &iter->seq;
1064 trace_assign_type(field, iter->ent);
1066 SEQ_PUT_FIELD_RET(s, field->ip);
1067 SEQ_PUT_FIELD_RET(s, field->parent_ip);
1069 return TRACE_TYPE_HANDLED;
1072 static struct trace_event_functions trace_fn_funcs = {
1073 .trace = trace_fn_trace,
1074 .raw = trace_fn_raw,
1075 .hex = trace_fn_hex,
1076 .binary = trace_fn_bin,
1079 static struct trace_event trace_fn_event = {
1081 .funcs = &trace_fn_funcs,
1084 /* TRACE_CTX an TRACE_WAKE */
1085 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1088 struct ctx_switch_entry *field;
1089 char comm[TASK_COMM_LEN];
1093 trace_assign_type(field, iter->ent);
1095 T = task_state_char(field->next_state);
1096 S = task_state_char(field->prev_state);
1097 trace_find_cmdline(field->next_pid, comm);
1098 if (!trace_seq_printf(&iter->seq,
1099 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1107 return TRACE_TYPE_PARTIAL_LINE;
1109 return TRACE_TYPE_HANDLED;
1112 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1113 struct trace_event *event)
1115 return trace_ctxwake_print(iter, "==>");
1118 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1119 int flags, struct trace_event *event)
1121 return trace_ctxwake_print(iter, " +");
1124 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1126 struct ctx_switch_entry *field;
1129 trace_assign_type(field, iter->ent);
1132 S = task_state_char(field->prev_state);
1133 T = task_state_char(field->next_state);
1134 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1142 return TRACE_TYPE_PARTIAL_LINE;
1144 return TRACE_TYPE_HANDLED;
1147 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1148 struct trace_event *event)
1150 return trace_ctxwake_raw(iter, 0);
1153 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1154 struct trace_event *event)
1156 return trace_ctxwake_raw(iter, '+');
1160 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1162 struct ctx_switch_entry *field;
1163 struct trace_seq *s = &iter->seq;
1166 trace_assign_type(field, iter->ent);
1169 S = task_state_char(field->prev_state);
1170 T = task_state_char(field->next_state);
1172 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1173 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1174 SEQ_PUT_HEX_FIELD_RET(s, S);
1175 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1176 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1177 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1178 SEQ_PUT_HEX_FIELD_RET(s, T);
1180 return TRACE_TYPE_HANDLED;
1183 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1184 struct trace_event *event)
1186 return trace_ctxwake_hex(iter, 0);
1189 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1190 struct trace_event *event)
1192 return trace_ctxwake_hex(iter, '+');
1195 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1196 int flags, struct trace_event *event)
1198 struct ctx_switch_entry *field;
1199 struct trace_seq *s = &iter->seq;
1201 trace_assign_type(field, iter->ent);
1203 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1204 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1205 SEQ_PUT_FIELD_RET(s, field->prev_state);
1206 SEQ_PUT_FIELD_RET(s, field->next_pid);
1207 SEQ_PUT_FIELD_RET(s, field->next_prio);
1208 SEQ_PUT_FIELD_RET(s, field->next_state);
1210 return TRACE_TYPE_HANDLED;
1213 static struct trace_event_functions trace_ctx_funcs = {
1214 .trace = trace_ctx_print,
1215 .raw = trace_ctx_raw,
1216 .hex = trace_ctx_hex,
1217 .binary = trace_ctxwake_bin,
1220 static struct trace_event trace_ctx_event = {
1222 .funcs = &trace_ctx_funcs,
1225 static struct trace_event_functions trace_wake_funcs = {
1226 .trace = trace_wake_print,
1227 .raw = trace_wake_raw,
1228 .hex = trace_wake_hex,
1229 .binary = trace_ctxwake_bin,
1232 static struct trace_event trace_wake_event = {
1234 .funcs = &trace_wake_funcs,
1239 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1240 int flags, struct trace_event *event)
1242 struct stack_entry *field;
1243 struct trace_seq *s = &iter->seq;
1247 trace_assign_type(field, iter->ent);
1248 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1250 if (!trace_seq_puts(s, "<stack trace>\n"))
1253 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1254 if (!trace_seq_puts(s, " => "))
1257 if (!seq_print_ip_sym(s, *p, flags))
1259 if (!trace_seq_putc(s, '\n'))
1263 return TRACE_TYPE_HANDLED;
1266 return TRACE_TYPE_PARTIAL_LINE;
1269 static struct trace_event_functions trace_stack_funcs = {
1270 .trace = trace_stack_print,
1273 static struct trace_event trace_stack_event = {
1274 .type = TRACE_STACK,
1275 .funcs = &trace_stack_funcs,
1278 /* TRACE_USER_STACK */
1279 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1280 int flags, struct trace_event *event)
1282 struct userstack_entry *field;
1283 struct trace_seq *s = &iter->seq;
1285 trace_assign_type(field, iter->ent);
1287 if (!trace_seq_puts(s, "<user stack trace>\n"))
1290 if (!seq_print_userip_objs(field, s, flags))
1293 return TRACE_TYPE_HANDLED;
1296 return TRACE_TYPE_PARTIAL_LINE;
1299 static struct trace_event_functions trace_user_stack_funcs = {
1300 .trace = trace_user_stack_print,
1303 static struct trace_event trace_user_stack_event = {
1304 .type = TRACE_USER_STACK,
1305 .funcs = &trace_user_stack_funcs,
1309 static enum print_line_t
1310 trace_bputs_print(struct trace_iterator *iter, int flags,
1311 struct trace_event *event)
1313 struct trace_entry *entry = iter->ent;
1314 struct trace_seq *s = &iter->seq;
1315 struct bputs_entry *field;
1317 trace_assign_type(field, entry);
1319 if (!seq_print_ip_sym(s, field->ip, flags))
1322 if (!trace_seq_puts(s, ": "))
1325 if (!trace_seq_puts(s, field->str))
1328 return TRACE_TYPE_HANDLED;
1331 return TRACE_TYPE_PARTIAL_LINE;
1335 static enum print_line_t
1336 trace_bputs_raw(struct trace_iterator *iter, int flags,
1337 struct trace_event *event)
1339 struct bputs_entry *field;
1340 struct trace_seq *s = &iter->seq;
1342 trace_assign_type(field, iter->ent);
1344 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1347 if (!trace_seq_puts(s, field->str))
1350 return TRACE_TYPE_HANDLED;
1353 return TRACE_TYPE_PARTIAL_LINE;
1356 static struct trace_event_functions trace_bputs_funcs = {
1357 .trace = trace_bputs_print,
1358 .raw = trace_bputs_raw,
1361 static struct trace_event trace_bputs_event = {
1362 .type = TRACE_BPUTS,
1363 .funcs = &trace_bputs_funcs,
1367 static enum print_line_t
1368 trace_bprint_print(struct trace_iterator *iter, int flags,
1369 struct trace_event *event)
1371 struct trace_entry *entry = iter->ent;
1372 struct trace_seq *s = &iter->seq;
1373 struct bprint_entry *field;
1375 trace_assign_type(field, entry);
1377 if (!seq_print_ip_sym(s, field->ip, flags))
1380 if (!trace_seq_puts(s, ": "))
1383 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1386 return TRACE_TYPE_HANDLED;
1389 return TRACE_TYPE_PARTIAL_LINE;
1393 static enum print_line_t
1394 trace_bprint_raw(struct trace_iterator *iter, int flags,
1395 struct trace_event *event)
1397 struct bprint_entry *field;
1398 struct trace_seq *s = &iter->seq;
1400 trace_assign_type(field, iter->ent);
1402 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1405 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1408 return TRACE_TYPE_HANDLED;
1411 return TRACE_TYPE_PARTIAL_LINE;
1414 static struct trace_event_functions trace_bprint_funcs = {
1415 .trace = trace_bprint_print,
1416 .raw = trace_bprint_raw,
1419 static struct trace_event trace_bprint_event = {
1420 .type = TRACE_BPRINT,
1421 .funcs = &trace_bprint_funcs,
1425 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1426 int flags, struct trace_event *event)
1428 struct print_entry *field;
1429 struct trace_seq *s = &iter->seq;
1431 trace_assign_type(field, iter->ent);
1433 if (!seq_print_ip_sym(s, field->ip, flags))
1436 if (!trace_seq_printf(s, ": %s", field->buf))
1439 return TRACE_TYPE_HANDLED;
1442 return TRACE_TYPE_PARTIAL_LINE;
1445 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1446 struct trace_event *event)
1448 struct print_entry *field;
1450 trace_assign_type(field, iter->ent);
1452 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1455 return TRACE_TYPE_HANDLED;
1458 return TRACE_TYPE_PARTIAL_LINE;
1461 static struct trace_event_functions trace_print_funcs = {
1462 .trace = trace_print_print,
1463 .raw = trace_print_raw,
1466 static struct trace_event trace_print_event = {
1467 .type = TRACE_PRINT,
1468 .funcs = &trace_print_funcs,
1472 static struct trace_event *events[] __initdata = {
1477 &trace_user_stack_event,
1479 &trace_bprint_event,
1484 __init static int init_events(void)
1486 struct trace_event *event;
1489 for (i = 0; events[i]; i++) {
1492 ret = register_ftrace_event(event);
1494 printk(KERN_WARNING "event %d failed to register\n",
1502 early_initcall(init_events);