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 enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter)
25 struct trace_seq *s = &iter->seq;
26 struct trace_entry *entry = iter->ent;
27 struct bputs_entry *field;
29 trace_assign_type(field, entry);
31 trace_seq_puts(s, field->str);
33 return trace_handle_return(s);
36 enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
38 struct trace_seq *s = &iter->seq;
39 struct trace_entry *entry = iter->ent;
40 struct bprint_entry *field;
42 trace_assign_type(field, entry);
44 trace_seq_bprintf(s, field->fmt, field->buf);
46 return trace_handle_return(s);
49 enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
51 struct trace_seq *s = &iter->seq;
52 struct trace_entry *entry = iter->ent;
53 struct print_entry *field;
55 trace_assign_type(field, entry);
57 trace_seq_puts(s, field->buf);
59 return trace_handle_return(s);
63 trace_print_flags_seq(struct trace_seq *p, const char *delim,
65 const struct trace_print_flags *flag_array)
69 const char *ret = trace_seq_buffer_ptr(p);
72 for (i = 0; flag_array[i].name && flags; i++) {
74 mask = flag_array[i].mask;
75 if ((flags & mask) != mask)
78 str = flag_array[i].name;
81 trace_seq_puts(p, delim);
84 trace_seq_puts(p, str);
87 /* check for left over flags */
90 trace_seq_puts(p, delim);
91 trace_seq_printf(p, "0x%lx", flags);
98 EXPORT_SYMBOL(trace_print_flags_seq);
101 trace_print_symbols_seq(struct trace_seq *p, unsigned long val,
102 const struct trace_print_flags *symbol_array)
105 const char *ret = trace_seq_buffer_ptr(p);
107 for (i = 0; symbol_array[i].name; i++) {
109 if (val != symbol_array[i].mask)
112 trace_seq_puts(p, symbol_array[i].name);
116 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
117 trace_seq_printf(p, "0x%lx", val);
119 trace_seq_putc(p, 0);
123 EXPORT_SYMBOL(trace_print_symbols_seq);
125 #if BITS_PER_LONG == 32
127 trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val,
128 const struct trace_print_flags_u64 *symbol_array)
131 const char *ret = trace_seq_buffer_ptr(p);
133 for (i = 0; symbol_array[i].name; i++) {
135 if (val != symbol_array[i].mask)
138 trace_seq_puts(p, symbol_array[i].name);
142 if (ret == (const char *)(trace_seq_buffer_ptr(p)))
143 trace_seq_printf(p, "0x%llx", val);
145 trace_seq_putc(p, 0);
149 EXPORT_SYMBOL(trace_print_symbols_seq_u64);
153 trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr,
154 unsigned int bitmask_size)
156 const char *ret = trace_seq_buffer_ptr(p);
158 trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8);
159 trace_seq_putc(p, 0);
163 EXPORT_SYMBOL_GPL(trace_print_bitmask_seq);
166 trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
169 const char *ret = trace_seq_buffer_ptr(p);
171 for (i = 0; i < buf_len; i++)
172 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
174 trace_seq_putc(p, 0);
178 EXPORT_SYMBOL(trace_print_hex_seq);
181 trace_print_array_seq(struct trace_seq *p, const void *buf, int count,
184 const char *ret = trace_seq_buffer_ptr(p);
185 const char *prefix = "";
186 void *ptr = (void *)buf;
187 size_t buf_len = count * el_size;
189 trace_seq_putc(p, '{');
191 while (ptr < buf + buf_len) {
194 trace_seq_printf(p, "%s0x%x", prefix,
198 trace_seq_printf(p, "%s0x%x", prefix,
202 trace_seq_printf(p, "%s0x%x", prefix,
206 trace_seq_printf(p, "%s0x%llx", prefix,
210 trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size,
218 trace_seq_putc(p, '}');
219 trace_seq_putc(p, 0);
223 EXPORT_SYMBOL(trace_print_array_seq);
225 int trace_raw_output_prep(struct trace_iterator *iter,
226 struct trace_event *trace_event)
228 struct trace_event_call *event;
229 struct trace_seq *s = &iter->seq;
230 struct trace_seq *p = &iter->tmp_seq;
231 struct trace_entry *entry;
233 event = container_of(trace_event, struct trace_event_call, event);
236 if (entry->type != event->event.type) {
238 return TRACE_TYPE_UNHANDLED;
242 trace_seq_printf(s, "%s: ", trace_event_name(event));
244 return trace_handle_return(s);
246 EXPORT_SYMBOL(trace_raw_output_prep);
248 static int trace_output_raw(struct trace_iterator *iter, char *name,
249 char *fmt, va_list ap)
251 struct trace_seq *s = &iter->seq;
253 trace_seq_printf(s, "%s: ", name);
254 trace_seq_vprintf(s, fmt, ap);
256 return trace_handle_return(s);
259 int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...)
265 ret = trace_output_raw(iter, name, fmt, ap);
270 EXPORT_SYMBOL_GPL(trace_output_call);
272 #ifdef CONFIG_KRETPROBES
273 static inline const char *kretprobed(const char *name)
275 static const char tramp_name[] = "kretprobe_trampoline";
276 int size = sizeof(tramp_name);
278 if (strncmp(tramp_name, name, size) == 0)
279 return "[unknown/kretprobe'd]";
283 static inline const char *kretprobed(const char *name)
287 #endif /* CONFIG_KRETPROBES */
290 seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
292 #ifdef CONFIG_KALLSYMS
293 char str[KSYM_SYMBOL_LEN];
296 kallsyms_lookup(address, NULL, NULL, NULL, str);
298 name = kretprobed(str);
300 trace_seq_printf(s, fmt, name);
305 seq_print_sym_offset(struct trace_seq *s, const char *fmt,
306 unsigned long address)
308 #ifdef CONFIG_KALLSYMS
309 char str[KSYM_SYMBOL_LEN];
312 sprint_symbol(str, address);
313 name = kretprobed(str);
315 trace_seq_printf(s, fmt, name);
320 # define IP_FMT "%08lx"
322 # define IP_FMT "%016lx"
325 static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
326 unsigned long ip, unsigned long sym_flags)
328 struct file *file = NULL;
329 unsigned long vmstart = 0;
336 const struct vm_area_struct *vma;
338 down_read(&mm->mmap_sem);
339 vma = find_vma(mm, ip);
342 vmstart = vma->vm_start;
345 ret = trace_seq_path(s, &file->f_path);
347 trace_seq_printf(s, "[+0x%lx]",
350 up_read(&mm->mmap_sem);
352 if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
353 trace_seq_printf(s, " <" IP_FMT ">", ip);
354 return !trace_seq_has_overflowed(s);
358 seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
361 trace_seq_putc(s, '0');
365 if (sym_flags & TRACE_ITER_SYM_OFFSET)
366 seq_print_sym_offset(s, "%s", ip);
368 seq_print_sym_short(s, "%s", ip);
370 if (sym_flags & TRACE_ITER_SYM_ADDR)
371 trace_seq_printf(s, " <" IP_FMT ">", ip);
374 return !trace_seq_has_overflowed(s);
378 * trace_print_lat_fmt - print the irq, preempt and lockdep fields
379 * @s: trace seq struct to write to
380 * @entry: The trace entry field from the ring buffer
382 * Prints the generic fields of irqs off, in hard or softirq, preempt
385 int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry)
393 hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
394 softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
397 (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
398 (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' :
401 switch (entry->flags & (TRACE_FLAG_NEED_RESCHED |
402 TRACE_FLAG_PREEMPT_RESCHED)) {
403 case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED:
406 case TRACE_FLAG_NEED_RESCHED:
409 case TRACE_FLAG_PREEMPT_RESCHED:
418 (hardirq && softirq) ? 'H' :
423 trace_seq_printf(s, "%c%c%c",
424 irqs_off, need_resched, hardsoft_irq);
426 if (entry->preempt_count)
427 trace_seq_printf(s, "%x", entry->preempt_count);
429 trace_seq_putc(s, '.');
431 return !trace_seq_has_overflowed(s);
435 lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
437 char comm[TASK_COMM_LEN];
439 trace_find_cmdline(entry->pid, comm);
441 trace_seq_printf(s, "%8.8s-%-5d %3d",
442 comm, entry->pid, cpu);
444 return trace_print_lat_fmt(s, entry);
448 #define MARK(v, s) {.val = v, .sym = s}
449 /* trace overhead mark */
450 static const struct trace_mark {
451 unsigned long long val; /* unit: nsec */
454 MARK(1000000000ULL , '$'), /* 1 sec */
455 MARK(100000000ULL , '@'), /* 100 msec */
456 MARK(10000000ULL , '*'), /* 10 msec */
457 MARK(1000000ULL , '#'), /* 1000 usecs */
458 MARK(100000ULL , '!'), /* 100 usecs */
459 MARK(10000ULL , '+'), /* 10 usecs */
463 char trace_find_mark(unsigned long long d)
466 int size = ARRAY_SIZE(mark);
468 for (i = 0; i < size; i++) {
473 return (i == size) ? ' ' : mark[i].sym;
477 lat_print_timestamp(struct trace_iterator *iter, u64 next_ts)
479 struct trace_array *tr = iter->tr;
480 unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE;
481 unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS;
482 unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start;
483 unsigned long long rel_ts = next_ts - iter->ts;
484 struct trace_seq *s = &iter->seq;
487 abs_ts = ns2usecs(abs_ts);
488 rel_ts = ns2usecs(rel_ts);
491 if (verbose && in_ns) {
492 unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC);
493 unsigned long abs_msec = (unsigned long)abs_ts;
494 unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC);
495 unsigned long rel_msec = (unsigned long)rel_ts;
498 s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ",
503 } else if (verbose && !in_ns) {
505 s, "[%016llx] %lld (+%lld): ",
506 iter->ts, abs_ts, rel_ts);
508 } else if (!verbose && in_ns) {
512 trace_find_mark(rel_ts * NSEC_PER_USEC));
514 } else { /* !verbose && !in_ns */
515 trace_seq_printf(s, " %4lld: ", abs_ts);
518 return !trace_seq_has_overflowed(s);
521 int trace_print_context(struct trace_iterator *iter)
523 struct trace_array *tr = iter->tr;
524 struct trace_seq *s = &iter->seq;
525 struct trace_entry *entry = iter->ent;
526 unsigned long long t;
527 unsigned long secs, usec_rem;
528 char comm[TASK_COMM_LEN];
531 trace_find_cmdline(entry->pid, comm);
533 trace_seq_printf(s, "%16s-%-5d ", comm, entry->pid);
535 if (tr->trace_flags & TRACE_ITER_TGID) {
536 tgid = trace_find_tgid(entry->pid);
538 trace_seq_puts(s, "(-----) ");
540 trace_seq_printf(s, "(%5d) ", tgid);
543 trace_seq_printf(s, "[%03d] ", iter->cpu);
545 if (tr->trace_flags & TRACE_ITER_IRQ_INFO)
546 trace_print_lat_fmt(s, entry);
548 if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) {
549 t = ns2usecs(iter->ts);
550 usec_rem = do_div(t, USEC_PER_SEC);
551 secs = (unsigned long)t;
552 trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem);
554 trace_seq_printf(s, " %12llu: ", iter->ts);
556 return !trace_seq_has_overflowed(s);
559 int trace_print_lat_context(struct trace_iterator *iter)
561 struct trace_array *tr = iter->tr;
562 /* trace_find_next_entry will reset ent_size */
563 int ent_size = iter->ent_size;
564 struct trace_seq *s = &iter->seq;
566 struct trace_entry *entry = iter->ent,
567 *next_entry = trace_find_next_entry(iter, NULL,
569 unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE);
571 /* Restore the original ent_size */
572 iter->ent_size = ent_size;
578 char comm[TASK_COMM_LEN];
580 trace_find_cmdline(entry->pid, comm);
583 s, "%16s %5d %3d %d %08x %08lx ",
584 comm, entry->pid, iter->cpu, entry->flags,
585 entry->preempt_count, iter->idx);
587 lat_print_generic(s, entry, iter->cpu);
590 lat_print_timestamp(iter, next_ts);
592 return !trace_seq_has_overflowed(s);
595 static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
597 static int task_state_char(unsigned long state)
599 int bit = state ? __ffs(state) + 1 : 0;
601 return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
605 * ftrace_find_event - find a registered event
606 * @type: the type of event to look for
608 * Returns an event of type @type otherwise NULL
609 * Called with trace_event_read_lock() held.
611 struct trace_event *ftrace_find_event(int type)
613 struct trace_event *event;
616 key = type & (EVENT_HASHSIZE - 1);
618 hlist_for_each_entry(event, &event_hash[key], node) {
619 if (event->type == type)
626 static LIST_HEAD(ftrace_event_list);
628 static int trace_search_list(struct list_head **list)
630 struct trace_event *e;
631 int last = __TRACE_LAST_TYPE;
633 if (list_empty(&ftrace_event_list)) {
634 *list = &ftrace_event_list;
639 * We used up all possible max events,
640 * lets see if somebody freed one.
642 list_for_each_entry(e, &ftrace_event_list, list) {
643 if (e->type != last + 1)
648 /* Did we used up all 65 thousand events??? */
649 if ((last + 1) > TRACE_EVENT_TYPE_MAX)
656 void trace_event_read_lock(void)
658 down_read(&trace_event_sem);
661 void trace_event_read_unlock(void)
663 up_read(&trace_event_sem);
667 * register_trace_event - register output for an event type
668 * @event: the event type to register
670 * Event types are stored in a hash and this hash is used to
671 * find a way to print an event. If the @event->type is set
672 * then it will use that type, otherwise it will assign a
675 * If you assign your own type, please make sure it is added
676 * to the trace_type enum in trace.h, to avoid collisions
677 * with the dynamic types.
679 * Returns the event type number or zero on error.
681 int register_trace_event(struct trace_event *event)
686 down_write(&trace_event_sem);
691 if (WARN_ON(!event->funcs))
694 INIT_LIST_HEAD(&event->list);
697 struct list_head *list = NULL;
699 if (next_event_type > TRACE_EVENT_TYPE_MAX) {
701 event->type = trace_search_list(&list);
707 event->type = next_event_type++;
708 list = &ftrace_event_list;
711 if (WARN_ON(ftrace_find_event(event->type)))
714 list_add_tail(&event->list, list);
716 } else if (event->type > __TRACE_LAST_TYPE) {
717 printk(KERN_WARNING "Need to add type to trace.h\n");
721 /* Is this event already used */
722 if (ftrace_find_event(event->type))
726 if (event->funcs->trace == NULL)
727 event->funcs->trace = trace_nop_print;
728 if (event->funcs->raw == NULL)
729 event->funcs->raw = trace_nop_print;
730 if (event->funcs->hex == NULL)
731 event->funcs->hex = trace_nop_print;
732 if (event->funcs->binary == NULL)
733 event->funcs->binary = trace_nop_print;
735 key = event->type & (EVENT_HASHSIZE - 1);
737 hlist_add_head(&event->node, &event_hash[key]);
741 up_write(&trace_event_sem);
745 EXPORT_SYMBOL_GPL(register_trace_event);
748 * Used by module code with the trace_event_sem held for write.
750 int __unregister_trace_event(struct trace_event *event)
752 hlist_del(&event->node);
753 list_del(&event->list);
758 * unregister_trace_event - remove a no longer used event
759 * @event: the event to remove
761 int unregister_trace_event(struct trace_event *event)
763 down_write(&trace_event_sem);
764 __unregister_trace_event(event);
765 up_write(&trace_event_sem);
769 EXPORT_SYMBOL_GPL(unregister_trace_event);
775 enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags,
776 struct trace_event *event)
778 trace_seq_printf(&iter->seq, "type: %d\n", iter->ent->type);
780 return trace_handle_return(&iter->seq);
784 static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags,
785 struct trace_event *event)
787 struct ftrace_entry *field;
788 struct trace_seq *s = &iter->seq;
790 trace_assign_type(field, iter->ent);
792 seq_print_ip_sym(s, field->ip, flags);
794 if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
795 trace_seq_puts(s, " <-");
796 seq_print_ip_sym(s, field->parent_ip, flags);
799 trace_seq_putc(s, '\n');
801 return trace_handle_return(s);
804 static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags,
805 struct trace_event *event)
807 struct ftrace_entry *field;
809 trace_assign_type(field, iter->ent);
811 trace_seq_printf(&iter->seq, "%lx %lx\n",
815 return trace_handle_return(&iter->seq);
818 static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags,
819 struct trace_event *event)
821 struct ftrace_entry *field;
822 struct trace_seq *s = &iter->seq;
824 trace_assign_type(field, iter->ent);
826 SEQ_PUT_HEX_FIELD(s, field->ip);
827 SEQ_PUT_HEX_FIELD(s, field->parent_ip);
829 return trace_handle_return(s);
832 static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags,
833 struct trace_event *event)
835 struct ftrace_entry *field;
836 struct trace_seq *s = &iter->seq;
838 trace_assign_type(field, iter->ent);
840 SEQ_PUT_FIELD(s, field->ip);
841 SEQ_PUT_FIELD(s, field->parent_ip);
843 return trace_handle_return(s);
846 static struct trace_event_functions trace_fn_funcs = {
847 .trace = trace_fn_trace,
850 .binary = trace_fn_bin,
853 static struct trace_event trace_fn_event = {
855 .funcs = &trace_fn_funcs,
858 /* TRACE_GRAPH_ENT */
859 static enum print_line_t trace_graph_ent_trace(struct trace_iterator *iter, int flags,
860 struct trace_event *event)
862 struct trace_seq *s = &iter->seq;
863 struct ftrace_graph_ent_entry *field;
865 trace_assign_type(field, iter->ent);
867 trace_seq_puts(s, "graph_ent: func=");
868 if (trace_seq_has_overflowed(s))
869 return TRACE_TYPE_PARTIAL_LINE;
871 if (!seq_print_ip_sym(s, field->graph_ent.func, flags))
872 return TRACE_TYPE_PARTIAL_LINE;
874 trace_seq_puts(s, "\n");
875 if (trace_seq_has_overflowed(s))
876 return TRACE_TYPE_PARTIAL_LINE;
878 return TRACE_TYPE_HANDLED;
881 static enum print_line_t trace_graph_ent_raw(struct trace_iterator *iter, int flags,
882 struct trace_event *event)
884 struct ftrace_graph_ent_entry *field;
886 trace_assign_type(field, iter->ent);
888 trace_seq_printf(&iter->seq, "%lx %d\n",
889 field->graph_ent.func,
890 field->graph_ent.depth);
891 if (trace_seq_has_overflowed(&iter->seq))
892 return TRACE_TYPE_PARTIAL_LINE;
894 return TRACE_TYPE_HANDLED;
897 static enum print_line_t trace_graph_ent_hex(struct trace_iterator *iter, int flags,
898 struct trace_event *event)
900 struct ftrace_graph_ent_entry *field;
901 struct trace_seq *s = &iter->seq;
903 trace_assign_type(field, iter->ent);
905 SEQ_PUT_HEX_FIELD(s, field->graph_ent.func);
906 SEQ_PUT_HEX_FIELD(s, field->graph_ent.depth);
908 return TRACE_TYPE_HANDLED;
911 static enum print_line_t trace_graph_ent_bin(struct trace_iterator *iter, int flags,
912 struct trace_event *event)
914 struct ftrace_graph_ent_entry *field;
915 struct trace_seq *s = &iter->seq;
917 trace_assign_type(field, iter->ent);
919 SEQ_PUT_FIELD(s, field->graph_ent.func);
920 SEQ_PUT_FIELD(s, field->graph_ent.depth);
922 return TRACE_TYPE_HANDLED;
925 static struct trace_event_functions trace_graph_ent_funcs = {
926 .trace = trace_graph_ent_trace,
927 .raw = trace_graph_ent_raw,
928 .hex = trace_graph_ent_hex,
929 .binary = trace_graph_ent_bin,
932 static struct trace_event trace_graph_ent_event = {
933 .type = TRACE_GRAPH_ENT,
934 .funcs = &trace_graph_ent_funcs,
937 /* TRACE_GRAPH_RET */
938 static enum print_line_t trace_graph_ret_trace(struct trace_iterator *iter, int flags,
939 struct trace_event *event)
941 struct trace_seq *s = &iter->seq;
942 struct trace_entry *entry = iter->ent;
943 struct ftrace_graph_ret_entry *field;
945 trace_assign_type(field, entry);
947 trace_seq_puts(s, "graph_ret: func=");
948 if (trace_seq_has_overflowed(s))
949 return TRACE_TYPE_PARTIAL_LINE;
951 if (!seq_print_ip_sym(s, field->ret.func, flags))
952 return TRACE_TYPE_PARTIAL_LINE;
954 trace_seq_puts(s, "\n");
955 if (trace_seq_has_overflowed(s))
956 return TRACE_TYPE_PARTIAL_LINE;
958 return TRACE_TYPE_HANDLED;
961 static enum print_line_t trace_graph_ret_raw(struct trace_iterator *iter, int flags,
962 struct trace_event *event)
964 struct ftrace_graph_ret_entry *field;
966 trace_assign_type(field, iter->ent);
968 trace_seq_printf(&iter->seq, "%lx %lld %lld %ld %d\n",
974 if (trace_seq_has_overflowed(&iter->seq))
975 return TRACE_TYPE_PARTIAL_LINE;
977 return TRACE_TYPE_HANDLED;
980 static enum print_line_t trace_graph_ret_hex(struct trace_iterator *iter, int flags,
981 struct trace_event *event)
983 struct ftrace_graph_ret_entry *field;
984 struct trace_seq *s = &iter->seq;
986 trace_assign_type(field, iter->ent);
988 SEQ_PUT_HEX_FIELD(s, field->ret.func);
989 SEQ_PUT_HEX_FIELD(s, field->ret.calltime);
990 SEQ_PUT_HEX_FIELD(s, field->ret.rettime);
991 SEQ_PUT_HEX_FIELD(s, field->ret.overrun);
992 SEQ_PUT_HEX_FIELD(s, field->ret.depth);
994 return TRACE_TYPE_HANDLED;
997 static enum print_line_t trace_graph_ret_bin(struct trace_iterator *iter, int flags,
998 struct trace_event *event)
1000 struct ftrace_graph_ret_entry *field;
1001 struct trace_seq *s = &iter->seq;
1003 trace_assign_type(field, iter->ent);
1005 SEQ_PUT_FIELD(s, field->ret.func);
1006 SEQ_PUT_FIELD(s, field->ret.calltime);
1007 SEQ_PUT_FIELD(s, field->ret.rettime);
1008 SEQ_PUT_FIELD(s, field->ret.overrun);
1009 SEQ_PUT_FIELD(s, field->ret.depth);
1011 return TRACE_TYPE_HANDLED;
1014 static struct trace_event_functions trace_graph_ret_funcs = {
1015 .trace = trace_graph_ret_trace,
1016 .raw = trace_graph_ret_raw,
1017 .hex = trace_graph_ret_hex,
1018 .binary = trace_graph_ret_bin,
1021 static struct trace_event trace_graph_ret_event = {
1022 .type = TRACE_GRAPH_RET,
1023 .funcs = &trace_graph_ret_funcs,
1026 /* TRACE_CTX an TRACE_WAKE */
1027 static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
1030 struct ctx_switch_entry *field;
1031 char comm[TASK_COMM_LEN];
1035 trace_assign_type(field, iter->ent);
1037 T = task_state_char(field->next_state);
1038 S = task_state_char(field->prev_state);
1039 trace_find_cmdline(field->next_pid, comm);
1040 trace_seq_printf(&iter->seq,
1041 " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
1050 return trace_handle_return(&iter->seq);
1053 static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags,
1054 struct trace_event *event)
1056 return trace_ctxwake_print(iter, "==>");
1059 static enum print_line_t trace_wake_print(struct trace_iterator *iter,
1060 int flags, struct trace_event *event)
1062 return trace_ctxwake_print(iter, " +");
1065 static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
1067 struct ctx_switch_entry *field;
1070 trace_assign_type(field, iter->ent);
1073 S = task_state_char(field->prev_state);
1074 T = task_state_char(field->next_state);
1075 trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
1084 return trace_handle_return(&iter->seq);
1087 static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags,
1088 struct trace_event *event)
1090 return trace_ctxwake_raw(iter, 0);
1093 static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags,
1094 struct trace_event *event)
1096 return trace_ctxwake_raw(iter, '+');
1100 static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
1102 struct ctx_switch_entry *field;
1103 struct trace_seq *s = &iter->seq;
1106 trace_assign_type(field, iter->ent);
1109 S = task_state_char(field->prev_state);
1110 T = task_state_char(field->next_state);
1112 SEQ_PUT_HEX_FIELD(s, field->prev_pid);
1113 SEQ_PUT_HEX_FIELD(s, field->prev_prio);
1114 SEQ_PUT_HEX_FIELD(s, S);
1115 SEQ_PUT_HEX_FIELD(s, field->next_cpu);
1116 SEQ_PUT_HEX_FIELD(s, field->next_pid);
1117 SEQ_PUT_HEX_FIELD(s, field->next_prio);
1118 SEQ_PUT_HEX_FIELD(s, T);
1120 return trace_handle_return(s);
1123 static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags,
1124 struct trace_event *event)
1126 return trace_ctxwake_hex(iter, 0);
1129 static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags,
1130 struct trace_event *event)
1132 return trace_ctxwake_hex(iter, '+');
1135 static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
1136 int flags, struct trace_event *event)
1138 struct ctx_switch_entry *field;
1139 struct trace_seq *s = &iter->seq;
1141 trace_assign_type(field, iter->ent);
1143 SEQ_PUT_FIELD(s, field->prev_pid);
1144 SEQ_PUT_FIELD(s, field->prev_prio);
1145 SEQ_PUT_FIELD(s, field->prev_state);
1146 SEQ_PUT_FIELD(s, field->next_cpu);
1147 SEQ_PUT_FIELD(s, field->next_pid);
1148 SEQ_PUT_FIELD(s, field->next_prio);
1149 SEQ_PUT_FIELD(s, field->next_state);
1151 return trace_handle_return(s);
1154 static struct trace_event_functions trace_ctx_funcs = {
1155 .trace = trace_ctx_print,
1156 .raw = trace_ctx_raw,
1157 .hex = trace_ctx_hex,
1158 .binary = trace_ctxwake_bin,
1161 static struct trace_event trace_ctx_event = {
1163 .funcs = &trace_ctx_funcs,
1166 static struct trace_event_functions trace_wake_funcs = {
1167 .trace = trace_wake_print,
1168 .raw = trace_wake_raw,
1169 .hex = trace_wake_hex,
1170 .binary = trace_ctxwake_bin,
1173 static struct trace_event trace_wake_event = {
1175 .funcs = &trace_wake_funcs,
1180 static enum print_line_t trace_stack_print(struct trace_iterator *iter,
1181 int flags, struct trace_event *event)
1183 struct stack_entry *field;
1184 struct trace_seq *s = &iter->seq;
1188 trace_assign_type(field, iter->ent);
1189 end = (unsigned long *)((long)iter->ent + iter->ent_size);
1191 trace_seq_puts(s, "<stack trace>\n");
1193 for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) {
1195 if (trace_seq_has_overflowed(s))
1198 trace_seq_puts(s, " => ");
1199 seq_print_ip_sym(s, *p, flags);
1200 trace_seq_putc(s, '\n');
1203 return trace_handle_return(s);
1206 static struct trace_event_functions trace_stack_funcs = {
1207 .trace = trace_stack_print,
1210 static struct trace_event trace_stack_event = {
1211 .type = TRACE_STACK,
1212 .funcs = &trace_stack_funcs,
1215 /* TRACE_USER_STACK */
1216 static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
1217 int flags, struct trace_event *event)
1219 struct trace_array *tr = iter->tr;
1220 struct userstack_entry *field;
1221 struct trace_seq *s = &iter->seq;
1222 struct mm_struct *mm = NULL;
1225 trace_assign_type(field, iter->ent);
1227 trace_seq_puts(s, "<user stack trace>\n");
1229 if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) {
1230 struct task_struct *task;
1232 * we do the lookup on the thread group leader,
1233 * since individual threads might have already quit!
1236 task = find_task_by_vpid(field->tgid);
1238 mm = get_task_mm(task);
1242 for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
1243 unsigned long ip = field->caller[i];
1245 if (ip == ULONG_MAX || trace_seq_has_overflowed(s))
1248 trace_seq_puts(s, " => ");
1251 trace_seq_puts(s, "??");
1252 trace_seq_putc(s, '\n');
1256 seq_print_user_ip(s, mm, ip, flags);
1257 trace_seq_putc(s, '\n');
1263 return trace_handle_return(s);
1266 static struct trace_event_functions trace_user_stack_funcs = {
1267 .trace = trace_user_stack_print,
1270 static struct trace_event trace_user_stack_event = {
1271 .type = TRACE_USER_STACK,
1272 .funcs = &trace_user_stack_funcs,
1276 static enum print_line_t
1277 trace_bputs_print(struct trace_iterator *iter, int flags,
1278 struct trace_event *event)
1280 struct trace_entry *entry = iter->ent;
1281 struct trace_seq *s = &iter->seq;
1282 struct bputs_entry *field;
1284 trace_assign_type(field, entry);
1286 seq_print_ip_sym(s, field->ip, flags);
1287 trace_seq_puts(s, ": ");
1288 trace_seq_puts(s, field->str);
1290 return trace_handle_return(s);
1294 static enum print_line_t
1295 trace_bputs_raw(struct trace_iterator *iter, int flags,
1296 struct trace_event *event)
1298 struct bputs_entry *field;
1299 struct trace_seq *s = &iter->seq;
1301 trace_assign_type(field, iter->ent);
1303 trace_seq_printf(s, ": %lx : ", field->ip);
1304 trace_seq_puts(s, field->str);
1306 return trace_handle_return(s);
1309 static struct trace_event_functions trace_bputs_funcs = {
1310 .trace = trace_bputs_print,
1311 .raw = trace_bputs_raw,
1314 static struct trace_event trace_bputs_event = {
1315 .type = TRACE_BPUTS,
1316 .funcs = &trace_bputs_funcs,
1320 static enum print_line_t
1321 trace_bprint_print(struct trace_iterator *iter, int flags,
1322 struct trace_event *event)
1324 struct trace_entry *entry = iter->ent;
1325 struct trace_seq *s = &iter->seq;
1326 struct bprint_entry *field;
1328 trace_assign_type(field, entry);
1330 seq_print_ip_sym(s, field->ip, flags);
1331 trace_seq_puts(s, ": ");
1332 trace_seq_bprintf(s, field->fmt, field->buf);
1334 return trace_handle_return(s);
1338 static enum print_line_t
1339 trace_bprint_raw(struct trace_iterator *iter, int flags,
1340 struct trace_event *event)
1342 struct bprint_entry *field;
1343 struct trace_seq *s = &iter->seq;
1345 trace_assign_type(field, iter->ent);
1347 trace_seq_printf(s, ": %lx : ", field->ip);
1348 trace_seq_bprintf(s, field->fmt, field->buf);
1350 return trace_handle_return(s);
1353 static struct trace_event_functions trace_bprint_funcs = {
1354 .trace = trace_bprint_print,
1355 .raw = trace_bprint_raw,
1358 static struct trace_event trace_bprint_event = {
1359 .type = TRACE_BPRINT,
1360 .funcs = &trace_bprint_funcs,
1364 static enum print_line_t trace_print_print(struct trace_iterator *iter,
1365 int flags, struct trace_event *event)
1367 struct print_entry *field;
1368 struct trace_seq *s = &iter->seq;
1370 trace_assign_type(field, iter->ent);
1372 seq_print_ip_sym(s, field->ip, flags);
1373 trace_seq_printf(s, ": %s", field->buf);
1375 return trace_handle_return(s);
1378 static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags,
1379 struct trace_event *event)
1381 struct print_entry *field;
1383 trace_assign_type(field, iter->ent);
1385 trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf);
1387 return trace_handle_return(&iter->seq);
1390 static struct trace_event_functions trace_print_funcs = {
1391 .trace = trace_print_print,
1392 .raw = trace_print_raw,
1395 static struct trace_event trace_print_event = {
1396 .type = TRACE_PRINT,
1397 .funcs = &trace_print_funcs,
1401 static struct trace_event *events[] __initdata = {
1403 &trace_graph_ent_event,
1404 &trace_graph_ret_event,
1408 &trace_user_stack_event,
1410 &trace_bprint_event,
1415 __init static int init_events(void)
1417 struct trace_event *event;
1420 for (i = 0; events[i]; i++) {
1423 ret = register_trace_event(event);
1425 printk(KERN_WARNING "event %d failed to register\n",
1433 early_initcall(init_events);