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_bitmask - put a list of longs as a bitmask print output
130 * @s: trace sequence descriptor
131 * @maskp: points to an array of unsigned longs that represent a bitmask
132 * @nmaskbits: The number of bits that are valid in @maskp
134 * It returns 0 if the trace oversizes the buffer's free
135 * space, 1 otherwise.
137 * Writes a ASCII representation of a bitmask string into @s.
140 trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
143 int len = (PAGE_SIZE - 1) - s->len;
149 ret = bitmap_scnprintf(s->buffer, len, maskp, nmaskbits);
154 EXPORT_SYMBOL_GPL(trace_seq_bitmask);
157 * trace_seq_vprintf - sequence printing of trace information
158 * @s: trace sequence descriptor
159 * @fmt: printf format string
161 * The tracer may use either sequence operations or its own
162 * copy to user routines. To simplify formating of a trace
163 * trace_seq_printf is used to store strings into a special
164 * buffer (@s). Then the output may be either used by
165 * the sequencer or pulled into another buffer.
168 trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
170 int len = (PAGE_SIZE - 1) - s->len;
176 ret = vsnprintf(s->buffer + s->len, len, fmt, args);
178 /* If we can't write it all, don't bother writing anything */
188 EXPORT_SYMBOL_GPL(trace_seq_vprintf);
190 int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
192 int len = (PAGE_SIZE - 1) - s->len;
198 ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
200 /* If we can't write it all, don't bother writing anything */
212 * trace_seq_puts - trace sequence printing of simple string
213 * @s: trace sequence descriptor
214 * @str: simple string to record
216 * The tracer may use either the sequence operations or its own
217 * copy to user routines. This function records a simple string
218 * into a special buffer (@s) for later retrieval by a sequencer
219 * or other mechanism.
221 int trace_seq_puts(struct trace_seq *s, const char *str)
223 int len = strlen(str);
228 if (len > ((PAGE_SIZE - 1) - s->len)) {
233 memcpy(s->buffer + s->len, str, len);
239 int trace_seq_putc(struct trace_seq *s, unsigned char c)
244 if (s->len >= (PAGE_SIZE - 1)) {
249 s->buffer[s->len++] = c;
253 EXPORT_SYMBOL(trace_seq_putc);
255 int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
260 if (len > ((PAGE_SIZE - 1) - s->len)) {
265 memcpy(s->buffer + s->len, mem, len);
271 int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
273 unsigned char hex[HEX_CHARS];
274 const unsigned char *data = mem;
281 for (i = 0, j = 0; i < len; i++) {
283 for (i = len-1, j = 0; i >= 0; i--) {
285 hex[j++] = hex_asc_hi(data[i]);
286 hex[j++] = hex_asc_lo(data[i]);
290 return trace_seq_putmem(s, hex, j);
293 void *trace_seq_reserve(struct trace_seq *s, size_t len)
300 if (len > ((PAGE_SIZE - 1) - s->len)) {
305 ret = s->buffer + s->len;
311 int trace_seq_path(struct trace_seq *s, const struct path *path)
318 if (s->len >= (PAGE_SIZE - 1)) {
323 p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
325 p = mangle_path(s->buffer + s->len, p, "\n");
327 s->len = p - s->buffer;
331 s->buffer[s->len++] = '?';
340 ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
342 const struct trace_print_flags *flag_array)
346 const char *ret = p->buffer + p->len;
349 for (i = 0; flag_array[i].name && flags; i++) {
351 mask = flag_array[i].mask;
352 if ((flags & mask) != mask)
355 str = flag_array[i].name;
358 trace_seq_puts(p, delim);
361 trace_seq_puts(p, str);
364 /* check for left over flags */
367 trace_seq_puts(p, delim);
368 trace_seq_printf(p, "0x%lx", flags);
371 trace_seq_putc(p, 0);
375 EXPORT_SYMBOL(ftrace_print_flags_seq);
378 ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
379 const struct trace_print_flags *symbol_array)
382 const char *ret = p->buffer + p->len;
384 for (i = 0; symbol_array[i].name; i++) {
386 if (val != symbol_array[i].mask)
389 trace_seq_puts(p, symbol_array[i].name);
393 if (ret == (const char *)(p->buffer + p->len))
394 trace_seq_printf(p, "0x%lx", val);
396 trace_seq_putc(p, 0);
400 EXPORT_SYMBOL(ftrace_print_symbols_seq);
402 #if BITS_PER_LONG == 32
404 ftrace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
405 const struct trace_print_flags_u64 *symbol_array)
408 const char *ret = p->buffer + p->len;
410 for (i = 0; symbol_array[i].name; i++) {
412 if (val != symbol_array[i].mask)
415 trace_seq_puts(p, symbol_array[i].name);
419 if (ret == (const char *)(p->buffer + p->len))
420 trace_seq_printf(p, "0x%llx", val);
422 trace_seq_putc(p, 0);
426 EXPORT_SYMBOL(ftrace_print_symbols_seq_u64);
430 ftrace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
431 unsigned int bitmask_size)
433 const char *ret = p->buffer + p->len;
435 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
436 trace_seq_putc(p, 0);
440 EXPORT_SYMBOL_GPL(ftrace_print_bitmask_seq);
443 ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
446 const char *ret = p->buffer + p->len;
448 for (i = 0; i < buf_len; i++)
449 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
451 trace_seq_putc(p, 0);
455 EXPORT_SYMBOL(ftrace_print_hex_seq);
457 int ftrace_raw_output_prep(struct trace_iterator *iter,
458 struct trace_event *trace_event)
460 struct ftrace_event_call *event;
461 struct trace_seq *s = &iter->seq;
462 struct trace_seq *p = &iter->tmp_seq;
463 struct trace_entry *entry;
466 event = container_of(trace_event, struct ftrace_event_call, event);
469 if (entry->type != event->event.type) {
471 return TRACE_TYPE_UNHANDLED;
475 ret = trace_seq_printf(s, "%s: ", ftrace_event_name(event));
477 return TRACE_TYPE_PARTIAL_LINE;
481 EXPORT_SYMBOL(ftrace_raw_output_prep);
483 static int ftrace_output_raw(struct trace_iterator *iter, char *name,
484 char *fmt, va_list ap)
486 struct trace_seq *s = &iter->seq;
489 ret = trace_seq_printf(s, "%s: ", name);
491 return TRACE_TYPE_PARTIAL_LINE;
493 ret = trace_seq_vprintf(s, fmt, ap);
496 return TRACE_TYPE_PARTIAL_LINE;
498 return TRACE_TYPE_HANDLED;
501 int ftrace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
507 ret = ftrace_output_raw(iter, name, fmt, ap);
512 EXPORT_SYMBOL_GPL(ftrace_output_call);
514 #ifdef CONFIG_KRETPROBES
515 static inline const char *kretprobed(const char *name)
517 static const char tramp_name[] = "kretprobe_trampoline";
518 int size = sizeof(tramp_name);
520 if (strncmp(tramp_name, name, size) == 0)
521 return "[unknown/kretprobe'd]";
525 static inline const char *kretprobed(const char *name)
529 #endif /* CONFIG_KRETPROBES */
532 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
534 #ifdef CONFIG_KALLSYMS
535 char str[KSYM_SYMBOL_LEN];
538 kallsyms_lookup(address, NULL, NULL, NULL, str);
540 name = kretprobed(str);
542 return trace_seq_printf(s, fmt, name);
548 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
549 unsigned long address)
551 #ifdef CONFIG_KALLSYMS
552 char str[KSYM_SYMBOL_LEN];
555 sprint_symbol(str, address);
556 name = kretprobed(str);
558 return trace_seq_printf(s, fmt, name);
564 # define IP_FMT "%08lx"
566 # define IP_FMT "%016lx"
569 int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
570 unsigned long ip, unsigned long sym_flags)
572 struct file *file = NULL;
573 unsigned long vmstart = 0;
580 const struct vm_area_struct *vma;
582 down_read(&mm->mmap_sem);
583 vma = find_vma(mm, ip);
586 vmstart = vma->vm_start;
589 ret = trace_seq_path(s, &file->f_path);
591 ret = trace_seq_printf(s, "[+0x%lx]",
594 up_read(&mm->mmap_sem);
596 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
597 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
602 seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
603 unsigned long sym_flags)
605 struct mm_struct *mm = NULL;
609 if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
610 struct task_struct *task;
612 * we do the lookup on the thread group leader,
613 * since individual threads might have already quit!
616 task = find_task_by_vpid(entry->tgid);
618 mm = get_task_mm(task);
622 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
623 unsigned long ip = entry->caller[i];
625 if (ip == ULONG_MAX || !ret)
628 ret = trace_seq_puts(s, " => ");
631 ret = trace_seq_puts(s, "??");
633 ret = trace_seq_putc(s, '\n');
639 ret = seq_print_user_ip(s, mm, ip, sym_flags);
640 ret = trace_seq_putc(s, '\n');
649 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
654 return trace_seq_putc(s, '0');
656 if (sym_flags & TRACE_ITER_SYM_OFFSET)
657 ret = seq_print_sym_offset(s, "%s", ip);
659 ret = seq_print_sym_short(s, "%s", ip);
664 if (sym_flags & TRACE_ITER_SYM_ADDR)
665 ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
670 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
671 * @s: trace seq struct to write to
672 * @entry: The trace entry field from the ring buffer
674 * Prints the generic fields of irqs off, in hard or softirq, preempt
677 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
686 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
687 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
690 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
691 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
694 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
695 TRACE_FLAG_PREEMPT_RESCHED)) {
696 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
699 case TRACE_FLAG_NEED_RESCHED:
702 case TRACE_FLAG_PREEMPT_RESCHED:
711 (hardirq && softirq) ? 'H' :
716 if (!trace_seq_printf(s, "%c%c%c",
717 irqs_off, need_resched, hardsoft_irq))
720 if (entry->preempt_count)
721 ret = trace_seq_printf(s, "%x", entry->preempt_count);
723 ret = trace_seq_putc(s, '.');
729 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
731 char comm[TASK_COMM_LEN];
733 trace_find_cmdline(entry->pid, comm);
735 if (!trace_seq_printf(s, "%8.8s-%-5d %3d",
736 comm, entry->pid, cpu))
739 return trace_print_lat_fmt(s, entry);
742 static unsigned long preempt_mark_thresh_us = 100;
745 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
747 unsigned long verbose = trace_flags & TRACE_ITER_VERBOSE;
748 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
749 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
750 unsigned long long rel_ts = next_ts - iter->ts;
751 struct trace_seq *s = &iter->seq;
754 abs_ts = ns2usecs(abs_ts);
755 rel_ts = ns2usecs(rel_ts);
758 if (verbose && in_ns) {
759 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
760 unsigned long abs_msec = (unsigned long)abs_ts;
761 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
762 unsigned long rel_msec = (unsigned long)rel_ts;
764 return trace_seq_printf(
765 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
769 } else if (verbose && !in_ns) {
770 return trace_seq_printf(
771 s, "[%016llx] %lld (+%lld): ",
772 iter->ts, abs_ts, rel_ts);
773 } else if (!verbose && in_ns) {
774 return trace_seq_printf(
777 rel_ts > preempt_mark_thresh_us ? '!' :
778 rel_ts > 1 ? '+' : ' ');
779 } else { /* !verbose && !in_ns */
780 return trace_seq_printf(s, " %4lld: ", abs_ts);
784 int trace_print_context(struct trace_iterator *iter)
786 struct trace_seq *s = &iter->seq;
787 struct trace_entry *entry = iter->ent;
788 unsigned long long t;
789 unsigned long secs, usec_rem;
790 char comm[TASK_COMM_LEN];
793 trace_find_cmdline(entry->pid, comm);
795 ret = trace_seq_printf(s, "%16s-%-5d [%03d] ",
796 comm, entry->pid, iter->cpu);
800 if (trace_flags & TRACE_ITER_IRQ_INFO) {
801 ret = trace_print_lat_fmt(s, entry);
806 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
807 t = ns2usecs(iter->ts);
808 usec_rem = do_div(t, USEC_PER_SEC);
809 secs = (unsigned long)t;
810 return trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
812 return trace_seq_printf(s, " %12llu: ", iter->ts);
815 int trace_print_lat_context(struct trace_iterator *iter)
819 /* trace_find_next_entry will reset ent_size */
820 int ent_size = iter->ent_size;
821 struct trace_seq *s = &iter->seq;
822 struct trace_entry *entry = iter->ent,
823 *next_entry = trace_find_next_entry(iter, NULL,
825 unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
827 /* Restore the original ent_size */
828 iter->ent_size = ent_size;
834 char comm[TASK_COMM_LEN];
836 trace_find_cmdline(entry->pid, comm);
838 ret = trace_seq_printf(
839 s, "%16s %5d %3d %d %08x %08lx ",
840 comm, entry->pid, iter->cpu, entry->flags,
841 entry->preempt_count, iter->idx);
843 ret = lat_print_generic(s, entry, iter->cpu);
847 ret = lat_print_timestamp(iter, next_ts);
852 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
854 static int task_state_char(unsigned long state)
856 int bit = state ? __ffs(state) + 1 : 0;
858 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
862 * ftrace_find_event - find a registered event
863 * @type: the type of event to look for
865 * Returns an event of type @type otherwise NULL
866 * Called with trace_event_read_lock() held.
868 struct trace_event *ftrace_find_event(int type)
870 struct trace_event *event;
873 key = type & (EVENT_HASHSIZE - 1);
875 hlist_for_each_entry(event, &event_hash[key], node) {
876 if (event->type == type)
883 static LIST_HEAD(ftrace_event_list);
885 static int trace_search_list(struct list_head **list)
887 struct trace_event *e;
888 int last = __TRACE_LAST_TYPE;
890 if (list_empty(&ftrace_event_list)) {
891 *list = &ftrace_event_list;
896 * We used up all possible max events,
897 * lets see if somebody freed one.
899 list_for_each_entry(e, &ftrace_event_list, list) {
900 if (e->type != last + 1)
905 /* Did we used up all 65 thousand events??? */
906 if ((last + 1) > FTRACE_MAX_EVENT)
913 void trace_event_read_lock(void)
915 down_read(&trace_event_sem);
918 void trace_event_read_unlock(void)
920 up_read(&trace_event_sem);
924 * register_ftrace_event - register output for an event type
925 * @event: the event type to register
927 * Event types are stored in a hash and this hash is used to
928 * find a way to print an event. If the @event->type is set
929 * then it will use that type, otherwise it will assign a
932 * If you assign your own type, please make sure it is added
933 * to the trace_type enum in trace.h, to avoid collisions
934 * with the dynamic types.
936 * Returns the event type number or zero on error.
938 int register_ftrace_event(struct trace_event *event)
943 down_write(&trace_event_sem);
948 if (WARN_ON(!event->funcs))
951 INIT_LIST_HEAD(&event->list);
954 struct list_head *list = NULL;
956 if (next_event_type > FTRACE_MAX_EVENT) {
958 event->type = trace_search_list(&list);
964 event->type = next_event_type++;
965 list = &ftrace_event_list;
968 if (WARN_ON(ftrace_find_event(event->type)))
971 list_add_tail(&event->list, list);
973 } else if (event->type > __TRACE_LAST_TYPE) {
974 printk(KERN_WARNING "Need to add type to trace.h\n");
978 /* Is this event already used */
979 if (ftrace_find_event(event->type))
983 if (event->funcs->trace == NULL)
984 event->funcs->trace = trace_nop_print;
985 if (event->funcs->raw == NULL)
986 event->funcs->raw = trace_nop_print;
987 if (event->funcs->hex == NULL)
988 event->funcs->hex = trace_nop_print;
989 if (event->funcs->binary == NULL)
990 event->funcs->binary = trace_nop_print;
992 key = event->type & (EVENT_HASHSIZE - 1);
994 hlist_add_head(&event->node, &event_hash[key]);
998 up_write(&trace_event_sem);
1002 EXPORT_SYMBOL_GPL(register_ftrace_event);
1005 * Used by module code with the trace_event_sem held for write.
1007 int __unregister_ftrace_event(struct trace_event *event)
1009 hlist_del(&event->node);
1010 list_del(&event->list);
1015 * unregister_ftrace_event - remove a no longer used event
1016 * @event: the event to remove
1018 int unregister_ftrace_event(struct trace_event *event)
1020 down_write(&trace_event_sem);
1021 __unregister_ftrace_event(event);
1022 up_write(&trace_event_sem);
1026 EXPORT_SYMBOL_GPL(unregister_ftrace_event);
1032 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
1033 struct trace_event *event)
1035 if (!trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type))
1036 return TRACE_TYPE_PARTIAL_LINE;
1038 return TRACE_TYPE_HANDLED;
1042 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
1043 struct trace_event *event)
1045 struct ftrace_entry *field;
1046 struct trace_seq *s = &iter->seq;
1048 trace_assign_type(field, iter->ent);
1050 if (!seq_print_ip_sym(s, field->ip, flags))
1053 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
1054 if (!trace_seq_puts(s, " <-"))
1056 if (!seq_print_ip_sym(s,
1061 if (!trace_seq_putc(s, '\n'))
1064 return TRACE_TYPE_HANDLED;
1067 return TRACE_TYPE_PARTIAL_LINE;
1070 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
1071 struct trace_event *event)
1073 struct ftrace_entry *field;
1075 trace_assign_type(field, iter->ent);
1077 if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
1080 return TRACE_TYPE_PARTIAL_LINE;
1082 return TRACE_TYPE_HANDLED;
1085 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
1086 struct trace_event *event)
1088 struct ftrace_entry *field;
1089 struct trace_seq *s = &iter->seq;
1091 trace_assign_type(field, iter->ent);
1093 SEQ_PUT_HEX_FIELD_RET(s, field->ip);
1094 SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
1096 return TRACE_TYPE_HANDLED;
1099 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
1100 struct trace_event *event)
1102 struct ftrace_entry *field;
1103 struct trace_seq *s = &iter->seq;
1105 trace_assign_type(field, iter->ent);
1107 SEQ_PUT_FIELD_RET(s, field->ip);
1108 SEQ_PUT_FIELD_RET(s, field->parent_ip);
1110 return TRACE_TYPE_HANDLED;
1113 static struct trace_event_functions trace_fn_funcs = {
1114 .trace = trace_fn_trace,
1115 .raw = trace_fn_raw,
1116 .hex = trace_fn_hex,
1117 .binary = trace_fn_bin,
1120 static struct trace_event trace_fn_event = {
1122 .funcs = &trace_fn_funcs,
1125 /* TRACE_CTX an TRACE_WAKE */
1126 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1129 struct ctx_switch_entry *field;
1130 char comm[TASK_COMM_LEN];
1134 trace_assign_type(field, iter->ent);
1136 T = task_state_char(field->next_state);
1137 S = task_state_char(field->prev_state);
1138 trace_find_cmdline(field->next_pid, comm);
1139 if (!trace_seq_printf(&iter->seq,
1140 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1148 return TRACE_TYPE_PARTIAL_LINE;
1150 return TRACE_TYPE_HANDLED;
1153 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1154 struct trace_event *event)
1156 return trace_ctxwake_print(iter, "==>");
1159 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1160 int flags, struct trace_event *event)
1162 return trace_ctxwake_print(iter, " +");
1165 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1167 struct ctx_switch_entry *field;
1170 trace_assign_type(field, iter->ent);
1173 S = task_state_char(field->prev_state);
1174 T = task_state_char(field->next_state);
1175 if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1183 return TRACE_TYPE_PARTIAL_LINE;
1185 return TRACE_TYPE_HANDLED;
1188 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1189 struct trace_event *event)
1191 return trace_ctxwake_raw(iter, 0);
1194 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1195 struct trace_event *event)
1197 return trace_ctxwake_raw(iter, '+');
1201 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1203 struct ctx_switch_entry *field;
1204 struct trace_seq *s = &iter->seq;
1207 trace_assign_type(field, iter->ent);
1210 S = task_state_char(field->prev_state);
1211 T = task_state_char(field->next_state);
1213 SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
1214 SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
1215 SEQ_PUT_HEX_FIELD_RET(s, S);
1216 SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
1217 SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
1218 SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
1219 SEQ_PUT_HEX_FIELD_RET(s, T);
1221 return TRACE_TYPE_HANDLED;
1224 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1225 struct trace_event *event)
1227 return trace_ctxwake_hex(iter, 0);
1230 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1231 struct trace_event *event)
1233 return trace_ctxwake_hex(iter, '+');
1236 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1237 int flags, struct trace_event *event)
1239 struct ctx_switch_entry *field;
1240 struct trace_seq *s = &iter->seq;
1242 trace_assign_type(field, iter->ent);
1244 SEQ_PUT_FIELD_RET(s, field->prev_pid);
1245 SEQ_PUT_FIELD_RET(s, field->prev_prio);
1246 SEQ_PUT_FIELD_RET(s, field->prev_state);
1247 SEQ_PUT_FIELD_RET(s, field->next_pid);
1248 SEQ_PUT_FIELD_RET(s, field->next_prio);
1249 SEQ_PUT_FIELD_RET(s, field->next_state);
1251 return TRACE_TYPE_HANDLED;
1254 static struct trace_event_functions trace_ctx_funcs = {
1255 .trace = trace_ctx_print,
1256 .raw = trace_ctx_raw,
1257 .hex = trace_ctx_hex,
1258 .binary = trace_ctxwake_bin,
1261 static struct trace_event trace_ctx_event = {
1263 .funcs = &trace_ctx_funcs,
1266 static struct trace_event_functions trace_wake_funcs = {
1267 .trace = trace_wake_print,
1268 .raw = trace_wake_raw,
1269 .hex = trace_wake_hex,
1270 .binary = trace_ctxwake_bin,
1273 static struct trace_event trace_wake_event = {
1275 .funcs = &trace_wake_funcs,
1280 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1281 int flags, struct trace_event *event)
1283 struct stack_entry *field;
1284 struct trace_seq *s = &iter->seq;
1288 trace_assign_type(field, iter->ent);
1289 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1291 if (!trace_seq_puts(s, "<stack trace>\n"))
1294 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1295 if (!trace_seq_puts(s, " => "))
1298 if (!seq_print_ip_sym(s, *p, flags))
1300 if (!trace_seq_putc(s, '\n'))
1304 return TRACE_TYPE_HANDLED;
1307 return TRACE_TYPE_PARTIAL_LINE;
1310 static struct trace_event_functions trace_stack_funcs = {
1311 .trace = trace_stack_print,
1314 static struct trace_event trace_stack_event = {
1315 .type = TRACE_STACK,
1316 .funcs = &trace_stack_funcs,
1319 /* TRACE_USER_STACK */
1320 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1321 int flags, struct trace_event *event)
1323 struct userstack_entry *field;
1324 struct trace_seq *s = &iter->seq;
1326 trace_assign_type(field, iter->ent);
1328 if (!trace_seq_puts(s, "<user stack trace>\n"))
1331 if (!seq_print_userip_objs(field, s, flags))
1334 return TRACE_TYPE_HANDLED;
1337 return TRACE_TYPE_PARTIAL_LINE;
1340 static struct trace_event_functions trace_user_stack_funcs = {
1341 .trace = trace_user_stack_print,
1344 static struct trace_event trace_user_stack_event = {
1345 .type = TRACE_USER_STACK,
1346 .funcs = &trace_user_stack_funcs,
1350 static enum print_line_t
1351 trace_bputs_print(struct trace_iterator *iter, int flags,
1352 struct trace_event *event)
1354 struct trace_entry *entry = iter->ent;
1355 struct trace_seq *s = &iter->seq;
1356 struct bputs_entry *field;
1358 trace_assign_type(field, entry);
1360 if (!seq_print_ip_sym(s, field->ip, flags))
1363 if (!trace_seq_puts(s, ": "))
1366 if (!trace_seq_puts(s, field->str))
1369 return TRACE_TYPE_HANDLED;
1372 return TRACE_TYPE_PARTIAL_LINE;
1376 static enum print_line_t
1377 trace_bputs_raw(struct trace_iterator *iter, int flags,
1378 struct trace_event *event)
1380 struct bputs_entry *field;
1381 struct trace_seq *s = &iter->seq;
1383 trace_assign_type(field, iter->ent);
1385 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1388 if (!trace_seq_puts(s, field->str))
1391 return TRACE_TYPE_HANDLED;
1394 return TRACE_TYPE_PARTIAL_LINE;
1397 static struct trace_event_functions trace_bputs_funcs = {
1398 .trace = trace_bputs_print,
1399 .raw = trace_bputs_raw,
1402 static struct trace_event trace_bputs_event = {
1403 .type = TRACE_BPUTS,
1404 .funcs = &trace_bputs_funcs,
1408 static enum print_line_t
1409 trace_bprint_print(struct trace_iterator *iter, int flags,
1410 struct trace_event *event)
1412 struct trace_entry *entry = iter->ent;
1413 struct trace_seq *s = &iter->seq;
1414 struct bprint_entry *field;
1416 trace_assign_type(field, entry);
1418 if (!seq_print_ip_sym(s, field->ip, flags))
1421 if (!trace_seq_puts(s, ": "))
1424 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1427 return TRACE_TYPE_HANDLED;
1430 return TRACE_TYPE_PARTIAL_LINE;
1434 static enum print_line_t
1435 trace_bprint_raw(struct trace_iterator *iter, int flags,
1436 struct trace_event *event)
1438 struct bprint_entry *field;
1439 struct trace_seq *s = &iter->seq;
1441 trace_assign_type(field, iter->ent);
1443 if (!trace_seq_printf(s, ": %lx : ", field->ip))
1446 if (!trace_seq_bprintf(s, field->fmt, field->buf))
1449 return TRACE_TYPE_HANDLED;
1452 return TRACE_TYPE_PARTIAL_LINE;
1455 static struct trace_event_functions trace_bprint_funcs = {
1456 .trace = trace_bprint_print,
1457 .raw = trace_bprint_raw,
1460 static struct trace_event trace_bprint_event = {
1461 .type = TRACE_BPRINT,
1462 .funcs = &trace_bprint_funcs,
1466 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1467 int flags, struct trace_event *event)
1469 struct print_entry *field;
1470 struct trace_seq *s = &iter->seq;
1472 trace_assign_type(field, iter->ent);
1474 if (!seq_print_ip_sym(s, field->ip, flags))
1477 if (!trace_seq_printf(s, ": %s", field->buf))
1480 return TRACE_TYPE_HANDLED;
1483 return TRACE_TYPE_PARTIAL_LINE;
1486 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1487 struct trace_event *event)
1489 struct print_entry *field;
1491 trace_assign_type(field, iter->ent);
1493 if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
1496 return TRACE_TYPE_HANDLED;
1499 return TRACE_TYPE_PARTIAL_LINE;
1502 static struct trace_event_functions trace_print_funcs = {
1503 .trace = trace_print_print,
1504 .raw = trace_print_raw,
1507 static struct trace_event trace_print_event = {
1508 .type = TRACE_PRINT,
1509 .funcs = &trace_print_funcs,
1513 static struct trace_event *events[] __initdata = {
1518 &trace_user_stack_event,
1520 &trace_bprint_event,
1525 __init static int init_events(void)
1527 struct trace_event *event;
1530 for (i = 0; events[i]; i++) {
1533 ret = register_ftrace_event(event);
1535 printk(KERN_WARNING "event %d failed to register\n",
1543 early_initcall(init_events);