2 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 * The parts for function graph printing was taken and modified from the
22 * Linux Kernel that were written by
23 * - Copyright (C) 2009 Frederic Weisbecker,
24 * Frederic Weisbecker gave his permission to relicense the code to
25 * the Lesser General Public License.
35 #include "event-parse.h"
36 #include "event-utils.h"
38 static const char *input_buf
;
39 static unsigned long long input_buf_ptr
;
40 static unsigned long long input_buf_siz
;
42 static int is_flag_field
;
43 static int is_symbolic_field
;
45 static int show_warning
= 1;
47 #define do_warning(fmt, ...) \
50 warning(fmt, ##__VA_ARGS__); \
53 static void init_input_buf(const char *buf
, unsigned long long size
)
60 const char *pevent_get_input_buf(void)
65 unsigned long long pevent_get_input_buf_ptr(void)
70 struct event_handler
{
71 struct event_handler
*next
;
74 const char *event_name
;
75 pevent_event_handler_func func
;
79 struct pevent_func_params
{
80 struct pevent_func_params
*next
;
81 enum pevent_func_arg_type type
;
84 struct pevent_function_handler
{
85 struct pevent_function_handler
*next
;
86 enum pevent_func_arg_type ret_type
;
88 pevent_func_handler func
;
89 struct pevent_func_params
*params
;
93 static unsigned long long
94 process_defined_func(struct trace_seq
*s
, void *data
, int size
,
95 struct event_format
*event
, struct print_arg
*arg
);
97 static void free_func_handle(struct pevent_function_handler
*func
);
100 * pevent_buffer_init - init buffer for parsing
101 * @buf: buffer to parse
102 * @size: the size of the buffer
104 * For use with pevent_read_token(), this initializes the internal
105 * buffer that pevent_read_token() will parse.
107 void pevent_buffer_init(const char *buf
, unsigned long long size
)
109 init_input_buf(buf
, size
);
112 void breakpoint(void)
118 struct print_arg
*alloc_arg(void)
120 struct print_arg
*arg
;
122 arg
= malloc_or_die(sizeof(*arg
));
125 memset(arg
, 0, sizeof(*arg
));
135 static int cmdline_cmp(const void *a
, const void *b
)
137 const struct cmdline
*ca
= a
;
138 const struct cmdline
*cb
= b
;
140 if (ca
->pid
< cb
->pid
)
142 if (ca
->pid
> cb
->pid
)
148 struct cmdline_list
{
149 struct cmdline_list
*next
;
154 static int cmdline_init(struct pevent
*pevent
)
156 struct cmdline_list
*cmdlist
= pevent
->cmdlist
;
157 struct cmdline_list
*item
;
158 struct cmdline
*cmdlines
;
161 cmdlines
= malloc_or_die(sizeof(*cmdlines
) * pevent
->cmdline_count
);
165 cmdlines
[i
].pid
= cmdlist
->pid
;
166 cmdlines
[i
].comm
= cmdlist
->comm
;
169 cmdlist
= cmdlist
->next
;
173 qsort(cmdlines
, pevent
->cmdline_count
, sizeof(*cmdlines
), cmdline_cmp
);
175 pevent
->cmdlines
= cmdlines
;
176 pevent
->cmdlist
= NULL
;
181 static char *find_cmdline(struct pevent
*pevent
, int pid
)
183 const struct cmdline
*comm
;
189 if (!pevent
->cmdlines
)
190 cmdline_init(pevent
);
194 comm
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
195 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
203 * pevent_pid_is_registered - return if a pid has a cmdline registered
204 * @pevent: handle for the pevent
205 * @pid: The pid to check if it has a cmdline registered with.
207 * Returns 1 if the pid has a cmdline mapped to it
210 int pevent_pid_is_registered(struct pevent
*pevent
, int pid
)
212 const struct cmdline
*comm
;
218 if (!pevent
->cmdlines
)
219 cmdline_init(pevent
);
223 comm
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
224 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
232 * If the command lines have been converted to an array, then
233 * we must add this pid. This is much slower than when cmdlines
234 * are added before the array is initialized.
236 static int add_new_comm(struct pevent
*pevent
, const char *comm
, int pid
)
238 struct cmdline
*cmdlines
= pevent
->cmdlines
;
239 const struct cmdline
*cmdline
;
245 /* avoid duplicates */
248 cmdline
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
249 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
255 cmdlines
= realloc(cmdlines
, sizeof(*cmdlines
) * (pevent
->cmdline_count
+ 1));
261 cmdlines
[pevent
->cmdline_count
].pid
= pid
;
262 cmdlines
[pevent
->cmdline_count
].comm
= strdup(comm
);
263 if (!cmdlines
[pevent
->cmdline_count
].comm
)
266 if (cmdlines
[pevent
->cmdline_count
].comm
)
267 pevent
->cmdline_count
++;
269 qsort(cmdlines
, pevent
->cmdline_count
, sizeof(*cmdlines
), cmdline_cmp
);
270 pevent
->cmdlines
= cmdlines
;
276 * pevent_register_comm - register a pid / comm mapping
277 * @pevent: handle for the pevent
278 * @comm: the command line to register
279 * @pid: the pid to map the command line to
281 * This adds a mapping to search for command line names with
282 * a given pid. The comm is duplicated.
284 int pevent_register_comm(struct pevent
*pevent
, const char *comm
, int pid
)
286 struct cmdline_list
*item
;
288 if (pevent
->cmdlines
)
289 return add_new_comm(pevent
, comm
, pid
);
291 item
= malloc_or_die(sizeof(*item
));
292 item
->comm
= strdup(comm
);
296 item
->next
= pevent
->cmdlist
;
298 pevent
->cmdlist
= item
;
299 pevent
->cmdline_count
++;
305 unsigned long long addr
;
311 struct func_list
*next
;
312 unsigned long long addr
;
317 static int func_cmp(const void *a
, const void *b
)
319 const struct func_map
*fa
= a
;
320 const struct func_map
*fb
= b
;
322 if (fa
->addr
< fb
->addr
)
324 if (fa
->addr
> fb
->addr
)
331 * We are searching for a record in between, not an exact
334 static int func_bcmp(const void *a
, const void *b
)
336 const struct func_map
*fa
= a
;
337 const struct func_map
*fb
= b
;
339 if ((fa
->addr
== fb
->addr
) ||
341 (fa
->addr
> fb
->addr
&&
342 fa
->addr
< (fb
+1)->addr
))
345 if (fa
->addr
< fb
->addr
)
351 static int func_map_init(struct pevent
*pevent
)
353 struct func_list
*funclist
;
354 struct func_list
*item
;
355 struct func_map
*func_map
;
358 func_map
= malloc_or_die(sizeof(*func_map
) * (pevent
->func_count
+ 1));
359 funclist
= pevent
->funclist
;
363 func_map
[i
].func
= funclist
->func
;
364 func_map
[i
].addr
= funclist
->addr
;
365 func_map
[i
].mod
= funclist
->mod
;
368 funclist
= funclist
->next
;
372 qsort(func_map
, pevent
->func_count
, sizeof(*func_map
), func_cmp
);
375 * Add a special record at the end.
377 func_map
[pevent
->func_count
].func
= NULL
;
378 func_map
[pevent
->func_count
].addr
= 0;
379 func_map
[pevent
->func_count
].mod
= NULL
;
381 pevent
->func_map
= func_map
;
382 pevent
->funclist
= NULL
;
387 static struct func_map
*
388 find_func(struct pevent
*pevent
, unsigned long long addr
)
390 struct func_map
*func
;
393 if (!pevent
->func_map
)
394 func_map_init(pevent
);
398 func
= bsearch(&key
, pevent
->func_map
, pevent
->func_count
,
399 sizeof(*pevent
->func_map
), func_bcmp
);
405 * pevent_find_function - find a function by a given address
406 * @pevent: handle for the pevent
407 * @addr: the address to find the function with
409 * Returns a pointer to the function stored that has the given
410 * address. Note, the address does not have to be exact, it
411 * will select the function that would contain the address.
413 const char *pevent_find_function(struct pevent
*pevent
, unsigned long long addr
)
415 struct func_map
*map
;
417 map
= find_func(pevent
, addr
);
425 * pevent_find_function_address - find a function address by a given address
426 * @pevent: handle for the pevent
427 * @addr: the address to find the function with
429 * Returns the address the function starts at. This can be used in
430 * conjunction with pevent_find_function to print both the function
431 * name and the function offset.
434 pevent_find_function_address(struct pevent
*pevent
, unsigned long long addr
)
436 struct func_map
*map
;
438 map
= find_func(pevent
, addr
);
446 * pevent_register_function - register a function with a given address
447 * @pevent: handle for the pevent
448 * @function: the function name to register
449 * @addr: the address the function starts at
450 * @mod: the kernel module the function may be in (NULL for none)
452 * This registers a function name with an address and module.
453 * The @func passed in is duplicated.
455 int pevent_register_function(struct pevent
*pevent
, char *func
,
456 unsigned long long addr
, char *mod
)
458 struct func_list
*item
;
460 item
= malloc_or_die(sizeof(*item
));
462 item
->next
= pevent
->funclist
;
463 item
->func
= strdup(func
);
465 item
->mod
= strdup(mod
);
470 if (!item
->func
|| (mod
&& !item
->mod
))
473 pevent
->funclist
= item
;
474 pevent
->func_count
++;
480 * pevent_print_funcs - print out the stored functions
481 * @pevent: handle for the pevent
483 * This prints out the stored functions.
485 void pevent_print_funcs(struct pevent
*pevent
)
489 if (!pevent
->func_map
)
490 func_map_init(pevent
);
492 for (i
= 0; i
< (int)pevent
->func_count
; i
++) {
494 pevent
->func_map
[i
].addr
,
495 pevent
->func_map
[i
].func
);
496 if (pevent
->func_map
[i
].mod
)
497 printf(" [%s]\n", pevent
->func_map
[i
].mod
);
504 unsigned long long addr
;
509 struct printk_list
*next
;
510 unsigned long long addr
;
514 static int printk_cmp(const void *a
, const void *b
)
516 const struct printk_map
*pa
= a
;
517 const struct printk_map
*pb
= b
;
519 if (pa
->addr
< pb
->addr
)
521 if (pa
->addr
> pb
->addr
)
527 static void printk_map_init(struct pevent
*pevent
)
529 struct printk_list
*printklist
;
530 struct printk_list
*item
;
531 struct printk_map
*printk_map
;
534 printk_map
= malloc_or_die(sizeof(*printk_map
) * (pevent
->printk_count
+ 1));
536 printklist
= pevent
->printklist
;
540 printk_map
[i
].printk
= printklist
->printk
;
541 printk_map
[i
].addr
= printklist
->addr
;
544 printklist
= printklist
->next
;
548 qsort(printk_map
, pevent
->printk_count
, sizeof(*printk_map
), printk_cmp
);
550 pevent
->printk_map
= printk_map
;
551 pevent
->printklist
= NULL
;
554 static struct printk_map
*
555 find_printk(struct pevent
*pevent
, unsigned long long addr
)
557 struct printk_map
*printk
;
558 struct printk_map key
;
560 if (!pevent
->printk_map
)
561 printk_map_init(pevent
);
565 printk
= bsearch(&key
, pevent
->printk_map
, pevent
->printk_count
,
566 sizeof(*pevent
->printk_map
), printk_cmp
);
572 * pevent_register_print_string - register a string by its address
573 * @pevent: handle for the pevent
574 * @fmt: the string format to register
575 * @addr: the address the string was located at
577 * This registers a string by the address it was stored in the kernel.
578 * The @fmt passed in is duplicated.
580 int pevent_register_print_string(struct pevent
*pevent
, char *fmt
,
581 unsigned long long addr
)
583 struct printk_list
*item
;
585 item
= malloc_or_die(sizeof(*item
));
587 item
->next
= pevent
->printklist
;
588 item
->printk
= strdup(fmt
);
594 pevent
->printklist
= item
;
595 pevent
->printk_count
++;
601 * pevent_print_printk - print out the stored strings
602 * @pevent: handle for the pevent
604 * This prints the string formats that were stored.
606 void pevent_print_printk(struct pevent
*pevent
)
610 if (!pevent
->printk_map
)
611 printk_map_init(pevent
);
613 for (i
= 0; i
< (int)pevent
->printk_count
; i
++) {
614 printf("%016llx %s\n",
615 pevent
->printk_map
[i
].addr
,
616 pevent
->printk_map
[i
].printk
);
620 static struct event_format
*alloc_event(void)
622 struct event_format
*event
;
624 event
= malloc(sizeof(*event
));
627 memset(event
, 0, sizeof(*event
));
632 static void add_event(struct pevent
*pevent
, struct event_format
*event
)
636 pevent
->events
= realloc(pevent
->events
, sizeof(event
) *
637 (pevent
->nr_events
+ 1));
639 die("Can not allocate events");
641 for (i
= 0; i
< pevent
->nr_events
; i
++) {
642 if (pevent
->events
[i
]->id
> event
->id
)
645 if (i
< pevent
->nr_events
)
646 memmove(&pevent
->events
[i
+ 1],
648 sizeof(event
) * (pevent
->nr_events
- i
));
650 pevent
->events
[i
] = event
;
653 event
->pevent
= pevent
;
656 static int event_item_type(enum event_type type
)
659 case EVENT_ITEM
... EVENT_SQUOTE
:
661 case EVENT_ERROR
... EVENT_DELIM
:
667 static void free_flag_sym(struct print_flag_sym
*fsym
)
669 struct print_flag_sym
*next
;
680 static void free_arg(struct print_arg
*arg
)
682 struct print_arg
*farg
;
689 free(arg
->atom
.atom
);
692 free(arg
->field
.name
);
695 free_arg(arg
->flags
.field
);
696 free(arg
->flags
.delim
);
697 free_flag_sym(arg
->flags
.flags
);
700 free_arg(arg
->symbol
.field
);
701 free_flag_sym(arg
->symbol
.symbols
);
704 free_arg(arg
->hex
.field
);
705 free_arg(arg
->hex
.size
);
708 free(arg
->typecast
.type
);
709 free_arg(arg
->typecast
.item
);
713 free(arg
->string
.string
);
715 case PRINT_DYNAMIC_ARRAY
:
716 free(arg
->dynarray
.index
);
720 free_arg(arg
->op
.left
);
721 free_arg(arg
->op
.right
);
724 while (arg
->func
.args
) {
725 farg
= arg
->func
.args
;
726 arg
->func
.args
= farg
->next
;
739 static enum event_type
get_type(int ch
)
742 return EVENT_NEWLINE
;
745 if (isalnum(ch
) || ch
== '_')
753 if (ch
== '(' || ch
== ')' || ch
== ',')
759 static int __read_char(void)
761 if (input_buf_ptr
>= input_buf_siz
)
764 return input_buf
[input_buf_ptr
++];
767 static int __peek_char(void)
769 if (input_buf_ptr
>= input_buf_siz
)
772 return input_buf
[input_buf_ptr
];
776 * pevent_peek_char - peek at the next character that will be read
778 * Returns the next character read, or -1 if end of buffer.
780 int pevent_peek_char(void)
782 return __peek_char();
785 static int extend_token(char **tok
, char *buf
, int size
)
787 char *newtok
= realloc(*tok
, size
);
804 static enum event_type
force_token(const char *str
, char **tok
);
806 static enum event_type
__read_token(char **tok
)
809 int ch
, last_ch
, quote_ch
, next_ch
;
812 enum event_type type
;
822 if (type
== EVENT_NONE
)
830 *tok
= malloc_or_die(2);
838 next_ch
= __peek_char();
839 if (next_ch
== '>') {
840 buf
[i
++] = __read_char();
853 buf
[i
++] = __read_char();
865 default: /* what should we do instead? */
875 buf
[i
++] = __read_char();
880 /* don't keep quotes */
886 if (i
== (BUFSIZ
- 1)) {
890 if (extend_token(tok
, buf
, tok_size
) < 0)
897 /* the '\' '\' will cancel itself */
898 if (ch
== '\\' && last_ch
== '\\')
900 } while (ch
!= quote_ch
|| last_ch
== '\\');
901 /* remove the last quote */
905 * For strings (double quotes) check the next token.
906 * If it is another string, concatinate the two.
908 if (type
== EVENT_DQUOTE
) {
909 unsigned long long save_input_buf_ptr
= input_buf_ptr
;
913 } while (isspace(ch
));
916 input_buf_ptr
= save_input_buf_ptr
;
921 case EVENT_ERROR
... EVENT_SPACE
:
927 while (get_type(__peek_char()) == type
) {
928 if (i
== (BUFSIZ
- 1)) {
932 if (extend_token(tok
, buf
, tok_size
) < 0)
942 if (extend_token(tok
, buf
, tok_size
+ i
+ 1) < 0)
945 if (type
== EVENT_ITEM
) {
947 * Older versions of the kernel has a bug that
948 * creates invalid symbols and will break the mac80211
949 * parsing. This is a work around to that bug.
951 * See Linux kernel commit:
952 * 811cb50baf63461ce0bdb234927046131fc7fa8b
954 if (strcmp(*tok
, "LOCAL_PR_FMT") == 0) {
957 return force_token("\"\%s\" ", tok
);
958 } else if (strcmp(*tok
, "STA_PR_FMT") == 0) {
961 return force_token("\" sta:%pM\" ", tok
);
962 } else if (strcmp(*tok
, "VIF_PR_FMT") == 0) {
965 return force_token("\" vif:%p(%d)\" ", tok
);
972 static enum event_type
force_token(const char *str
, char **tok
)
974 const char *save_input_buf
;
975 unsigned long long save_input_buf_ptr
;
976 unsigned long long save_input_buf_siz
;
977 enum event_type type
;
979 /* save off the current input pointers */
980 save_input_buf
= input_buf
;
981 save_input_buf_ptr
= input_buf_ptr
;
982 save_input_buf_siz
= input_buf_siz
;
984 init_input_buf(str
, strlen(str
));
986 type
= __read_token(tok
);
988 /* reset back to original token */
989 input_buf
= save_input_buf
;
990 input_buf_ptr
= save_input_buf_ptr
;
991 input_buf_siz
= save_input_buf_siz
;
996 static void free_token(char *tok
)
1002 static enum event_type
read_token(char **tok
)
1004 enum event_type type
;
1007 type
= __read_token(tok
);
1008 if (type
!= EVENT_SPACE
)
1020 * pevent_read_token - access to utilites to use the pevent parser
1021 * @tok: The token to return
1023 * This will parse tokens from the string given by
1024 * pevent_init_data().
1026 * Returns the token type.
1028 enum event_type
pevent_read_token(char **tok
)
1030 return read_token(tok
);
1034 * pevent_free_token - free a token returned by pevent_read_token
1035 * @token: the token to free
1037 void pevent_free_token(char *token
)
1043 static enum event_type
read_token_item(char **tok
)
1045 enum event_type type
;
1048 type
= __read_token(tok
);
1049 if (type
!= EVENT_SPACE
&& type
!= EVENT_NEWLINE
)
1060 static int test_type(enum event_type type
, enum event_type expect
)
1062 if (type
!= expect
) {
1063 do_warning("Error: expected type %d but read %d",
1070 static int test_type_token(enum event_type type
, const char *token
,
1071 enum event_type expect
, const char *expect_tok
)
1073 if (type
!= expect
) {
1074 do_warning("Error: expected type %d but read %d",
1079 if (strcmp(token
, expect_tok
) != 0) {
1080 do_warning("Error: expected '%s' but read '%s'",
1087 static int __read_expect_type(enum event_type expect
, char **tok
, int newline_ok
)
1089 enum event_type type
;
1092 type
= read_token(tok
);
1094 type
= read_token_item(tok
);
1095 return test_type(type
, expect
);
1098 static int read_expect_type(enum event_type expect
, char **tok
)
1100 return __read_expect_type(expect
, tok
, 1);
1103 static int __read_expected(enum event_type expect
, const char *str
,
1106 enum event_type type
;
1111 type
= read_token(&token
);
1113 type
= read_token_item(&token
);
1115 ret
= test_type_token(type
, token
, expect
, str
);
1122 static int read_expected(enum event_type expect
, const char *str
)
1124 return __read_expected(expect
, str
, 1);
1127 static int read_expected_item(enum event_type expect
, const char *str
)
1129 return __read_expected(expect
, str
, 0);
1132 static char *event_read_name(void)
1136 if (read_expected(EVENT_ITEM
, "name") < 0)
1139 if (read_expected(EVENT_OP
, ":") < 0)
1142 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1152 static int event_read_id(void)
1157 if (read_expected_item(EVENT_ITEM
, "ID") < 0)
1160 if (read_expected(EVENT_OP
, ":") < 0)
1163 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1166 id
= strtoul(token
, NULL
, 0);
1175 static int field_is_string(struct format_field
*field
)
1177 if ((field
->flags
& FIELD_IS_ARRAY
) &&
1178 (strstr(field
->type
, "char") || strstr(field
->type
, "u8") ||
1179 strstr(field
->type
, "s8")))
1185 static int field_is_dynamic(struct format_field
*field
)
1187 if (strncmp(field
->type
, "__data_loc", 10) == 0)
1193 static int field_is_long(struct format_field
*field
)
1195 /* includes long long */
1196 if (strstr(field
->type
, "long"))
1202 static int event_read_fields(struct event_format
*event
, struct format_field
**fields
)
1204 struct format_field
*field
= NULL
;
1205 enum event_type type
;
1211 type
= read_token(&token
);
1212 if (type
== EVENT_NEWLINE
) {
1219 if (test_type_token(type
, token
, EVENT_ITEM
, "field"))
1223 type
= read_token(&token
);
1225 * The ftrace fields may still use the "special" name.
1228 if (event
->flags
& EVENT_FL_ISFTRACE
&&
1229 type
== EVENT_ITEM
&& strcmp(token
, "special") == 0) {
1231 type
= read_token(&token
);
1234 if (test_type_token(type
, token
, EVENT_OP
, ":") < 0)
1238 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1243 field
= malloc_or_die(sizeof(*field
));
1244 memset(field
, 0, sizeof(*field
));
1245 field
->event
= event
;
1247 /* read the rest of the type */
1249 type
= read_token(&token
);
1250 if (type
== EVENT_ITEM
||
1251 (type
== EVENT_OP
&& strcmp(token
, "*") == 0) ||
1253 * Some of the ftrace fields are broken and have
1254 * an illegal "." in them.
1256 (event
->flags
& EVENT_FL_ISFTRACE
&&
1257 type
== EVENT_OP
&& strcmp(token
, ".") == 0)) {
1259 if (strcmp(token
, "*") == 0)
1260 field
->flags
|= FIELD_IS_POINTER
;
1264 new_type
= realloc(field
->type
,
1265 strlen(field
->type
) +
1266 strlen(last_token
) + 2);
1271 field
->type
= new_type
;
1272 strcat(field
->type
, " ");
1273 strcat(field
->type
, last_token
);
1276 field
->type
= last_token
;
1285 die("no type found");
1288 field
->name
= last_token
;
1290 if (test_type(type
, EVENT_OP
))
1293 if (strcmp(token
, "[") == 0) {
1294 enum event_type last_type
= type
;
1295 char *brackets
= token
;
1299 field
->flags
|= FIELD_IS_ARRAY
;
1301 type
= read_token(&token
);
1303 if (type
== EVENT_ITEM
)
1304 field
->arraylen
= strtoul(token
, NULL
, 0);
1306 field
->arraylen
= 0;
1308 while (strcmp(token
, "]") != 0) {
1309 if (last_type
== EVENT_ITEM
&&
1316 new_brackets
= realloc(brackets
,
1318 strlen(token
) + len
);
1319 if (!new_brackets
) {
1323 brackets
= new_brackets
;
1325 strcat(brackets
, " ");
1326 strcat(brackets
, token
);
1327 /* We only care about the last token */
1328 field
->arraylen
= strtoul(token
, NULL
, 0);
1330 type
= read_token(&token
);
1331 if (type
== EVENT_NONE
) {
1332 die("failed to find token");
1339 new_brackets
= realloc(brackets
, strlen(brackets
) + 2);
1340 if (!new_brackets
) {
1344 brackets
= new_brackets
;
1345 strcat(brackets
, "]");
1347 /* add brackets to type */
1349 type
= read_token(&token
);
1351 * If the next token is not an OP, then it is of
1352 * the format: type [] item;
1354 if (type
== EVENT_ITEM
) {
1356 new_type
= realloc(field
->type
,
1357 strlen(field
->type
) +
1358 strlen(field
->name
) +
1359 strlen(brackets
) + 2);
1364 field
->type
= new_type
;
1365 strcat(field
->type
, " ");
1366 strcat(field
->type
, field
->name
);
1367 free_token(field
->name
);
1368 strcat(field
->type
, brackets
);
1369 field
->name
= token
;
1370 type
= read_token(&token
);
1373 new_type
= realloc(field
->type
,
1374 strlen(field
->type
) +
1375 strlen(brackets
) + 1);
1380 field
->type
= new_type
;
1381 strcat(field
->type
, brackets
);
1386 if (field_is_string(field
))
1387 field
->flags
|= FIELD_IS_STRING
;
1388 if (field_is_dynamic(field
))
1389 field
->flags
|= FIELD_IS_DYNAMIC
;
1390 if (field_is_long(field
))
1391 field
->flags
|= FIELD_IS_LONG
;
1393 if (test_type_token(type
, token
, EVENT_OP
, ";"))
1397 if (read_expected(EVENT_ITEM
, "offset") < 0)
1400 if (read_expected(EVENT_OP
, ":") < 0)
1403 if (read_expect_type(EVENT_ITEM
, &token
))
1405 field
->offset
= strtoul(token
, NULL
, 0);
1408 if (read_expected(EVENT_OP
, ";") < 0)
1411 if (read_expected(EVENT_ITEM
, "size") < 0)
1414 if (read_expected(EVENT_OP
, ":") < 0)
1417 if (read_expect_type(EVENT_ITEM
, &token
))
1419 field
->size
= strtoul(token
, NULL
, 0);
1422 if (read_expected(EVENT_OP
, ";") < 0)
1425 type
= read_token(&token
);
1426 if (type
!= EVENT_NEWLINE
) {
1427 /* newer versions of the kernel have a "signed" type */
1428 if (test_type_token(type
, token
, EVENT_ITEM
, "signed"))
1433 if (read_expected(EVENT_OP
, ":") < 0)
1436 if (read_expect_type(EVENT_ITEM
, &token
))
1439 /* add signed type */
1442 if (read_expected(EVENT_OP
, ";") < 0)
1445 if (read_expect_type(EVENT_NEWLINE
, &token
))
1451 if (field
->flags
& FIELD_IS_ARRAY
) {
1452 if (field
->arraylen
)
1453 field
->elementsize
= field
->size
/ field
->arraylen
;
1454 else if (field
->flags
& FIELD_IS_STRING
)
1455 field
->elementsize
= 1;
1457 field
->elementsize
= event
->pevent
->long_size
;
1459 field
->elementsize
= field
->size
;
1462 fields
= &field
->next
;
1479 static int event_read_format(struct event_format
*event
)
1484 if (read_expected_item(EVENT_ITEM
, "format") < 0)
1487 if (read_expected(EVENT_OP
, ":") < 0)
1490 if (read_expect_type(EVENT_NEWLINE
, &token
))
1494 ret
= event_read_fields(event
, &event
->format
.common_fields
);
1497 event
->format
.nr_common
= ret
;
1499 ret
= event_read_fields(event
, &event
->format
.fields
);
1502 event
->format
.nr_fields
= ret
;
1511 static enum event_type
1512 process_arg_token(struct event_format
*event
, struct print_arg
*arg
,
1513 char **tok
, enum event_type type
);
1515 static enum event_type
1516 process_arg(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
1518 enum event_type type
;
1521 type
= read_token(&token
);
1524 return process_arg_token(event
, arg
, tok
, type
);
1527 static enum event_type
1528 process_op(struct event_format
*event
, struct print_arg
*arg
, char **tok
);
1530 static enum event_type
1531 process_cond(struct event_format
*event
, struct print_arg
*top
, char **tok
)
1533 struct print_arg
*arg
, *left
, *right
;
1534 enum event_type type
;
1539 right
= alloc_arg();
1541 arg
->type
= PRINT_OP
;
1542 arg
->op
.left
= left
;
1543 arg
->op
.right
= right
;
1546 type
= process_arg(event
, left
, &token
);
1549 /* Handle other operations in the arguments */
1550 if (type
== EVENT_OP
&& strcmp(token
, ":") != 0) {
1551 type
= process_op(event
, left
, &token
);
1555 if (test_type_token(type
, token
, EVENT_OP
, ":"))
1560 type
= process_arg(event
, right
, &token
);
1562 top
->op
.right
= arg
;
1568 /* Top may point to itself */
1569 top
->op
.right
= NULL
;
1575 static enum event_type
1576 process_array(struct event_format
*event
, struct print_arg
*top
, char **tok
)
1578 struct print_arg
*arg
;
1579 enum event_type type
;
1585 type
= process_arg(event
, arg
, &token
);
1586 if (test_type_token(type
, token
, EVENT_OP
, "]"))
1589 top
->op
.right
= arg
;
1592 type
= read_token_item(&token
);
1604 static int get_op_prio(char *op
)
1618 /* '>>' and '<<' are 8 */
1622 /* '==' and '!=' are 10 */
1632 do_warning("unknown op '%c'", op
[0]);
1636 if (strcmp(op
, "++") == 0 ||
1637 strcmp(op
, "--") == 0) {
1639 } else if (strcmp(op
, ">>") == 0 ||
1640 strcmp(op
, "<<") == 0) {
1642 } else if (strcmp(op
, ">=") == 0 ||
1643 strcmp(op
, "<=") == 0) {
1645 } else if (strcmp(op
, "==") == 0 ||
1646 strcmp(op
, "!=") == 0) {
1648 } else if (strcmp(op
, "&&") == 0) {
1650 } else if (strcmp(op
, "||") == 0) {
1653 do_warning("unknown op '%s'", op
);
1659 static int set_op_prio(struct print_arg
*arg
)
1662 /* single ops are the greatest */
1663 if (!arg
->op
.left
|| arg
->op
.left
->type
== PRINT_NULL
)
1666 arg
->op
.prio
= get_op_prio(arg
->op
.op
);
1668 return arg
->op
.prio
;
1671 /* Note, *tok does not get freed, but will most likely be saved */
1672 static enum event_type
1673 process_op(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
1675 struct print_arg
*left
, *right
= NULL
;
1676 enum event_type type
;
1679 /* the op is passed in via tok */
1682 if (arg
->type
== PRINT_OP
&& !arg
->op
.left
) {
1683 /* handle single op */
1685 die("bad op token %s", token
);
1695 do_warning("bad op token %s", token
);
1700 /* make an empty left */
1702 left
->type
= PRINT_NULL
;
1703 arg
->op
.left
= left
;
1705 right
= alloc_arg();
1706 arg
->op
.right
= right
;
1708 /* do not free the token, it belongs to an op */
1710 type
= process_arg(event
, right
, tok
);
1712 } else if (strcmp(token
, "?") == 0) {
1715 /* copy the top arg to the left */
1718 arg
->type
= PRINT_OP
;
1720 arg
->op
.left
= left
;
1723 type
= process_cond(event
, arg
, tok
);
1725 } else if (strcmp(token
, ">>") == 0 ||
1726 strcmp(token
, "<<") == 0 ||
1727 strcmp(token
, "&") == 0 ||
1728 strcmp(token
, "|") == 0 ||
1729 strcmp(token
, "&&") == 0 ||
1730 strcmp(token
, "||") == 0 ||
1731 strcmp(token
, "-") == 0 ||
1732 strcmp(token
, "+") == 0 ||
1733 strcmp(token
, "*") == 0 ||
1734 strcmp(token
, "^") == 0 ||
1735 strcmp(token
, "/") == 0 ||
1736 strcmp(token
, "<") == 0 ||
1737 strcmp(token
, ">") == 0 ||
1738 strcmp(token
, "==") == 0 ||
1739 strcmp(token
, "!=") == 0) {
1743 /* copy the top arg to the left */
1746 arg
->type
= PRINT_OP
;
1748 arg
->op
.left
= left
;
1750 if (set_op_prio(arg
) == -1) {
1751 event
->flags
|= EVENT_FL_FAILED
;
1752 /* arg->op.op (= token) will be freed at out_free */
1757 type
= read_token_item(&token
);
1760 /* could just be a type pointer */
1761 if ((strcmp(arg
->op
.op
, "*") == 0) &&
1762 type
== EVENT_DELIM
&& (strcmp(token
, ")") == 0)) {
1765 if (left
->type
!= PRINT_ATOM
)
1766 die("bad pointer type");
1767 new_atom
= realloc(left
->atom
.atom
,
1768 strlen(left
->atom
.atom
) + 3);
1772 left
->atom
.atom
= new_atom
;
1773 strcat(left
->atom
.atom
, " *");
1781 right
= alloc_arg();
1782 type
= process_arg_token(event
, right
, tok
, type
);
1783 arg
->op
.right
= right
;
1785 } else if (strcmp(token
, "[") == 0) {
1790 arg
->type
= PRINT_OP
;
1792 arg
->op
.left
= left
;
1796 type
= process_array(event
, arg
, tok
);
1799 do_warning("unknown op '%s'", token
);
1800 event
->flags
|= EVENT_FL_FAILED
;
1801 /* the arg is now the left side */
1805 if (type
== EVENT_OP
&& strcmp(*tok
, ":") != 0) {
1808 /* higher prios need to be closer to the root */
1809 prio
= get_op_prio(*tok
);
1811 if (prio
> arg
->op
.prio
)
1812 return process_op(event
, arg
, tok
);
1814 return process_op(event
, right
, tok
);
1825 static enum event_type
1826 process_entry(struct event_format
*event __unused
, struct print_arg
*arg
,
1829 enum event_type type
;
1833 if (read_expected(EVENT_OP
, "->") < 0)
1836 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1840 arg
->type
= PRINT_FIELD
;
1841 arg
->field
.name
= field
;
1843 if (is_flag_field
) {
1844 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
1845 arg
->field
.field
->flags
|= FIELD_IS_FLAG
;
1847 } else if (is_symbolic_field
) {
1848 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
1849 arg
->field
.field
->flags
|= FIELD_IS_SYMBOLIC
;
1850 is_symbolic_field
= 0;
1853 type
= read_token(&token
);
1865 static char *arg_eval (struct print_arg
*arg
);
1867 static unsigned long long
1868 eval_type_str(unsigned long long val
, const char *type
, int pointer
)
1878 if (type
[len
-1] != '*') {
1879 do_warning("pointer expected with non pointer type");
1883 ref
= malloc_or_die(len
);
1884 memcpy(ref
, type
, len
);
1886 /* chop off the " *" */
1889 val
= eval_type_str(val
, ref
, 0);
1894 /* check if this is a pointer */
1895 if (type
[len
- 1] == '*')
1898 /* Try to figure out the arg size*/
1899 if (strncmp(type
, "struct", 6) == 0)
1903 if (strcmp(type
, "u8") == 0)
1906 if (strcmp(type
, "u16") == 0)
1907 return val
& 0xffff;
1909 if (strcmp(type
, "u32") == 0)
1910 return val
& 0xffffffff;
1912 if (strcmp(type
, "u64") == 0 ||
1913 strcmp(type
, "s64"))
1916 if (strcmp(type
, "s8") == 0)
1917 return (unsigned long long)(char)val
& 0xff;
1919 if (strcmp(type
, "s16") == 0)
1920 return (unsigned long long)(short)val
& 0xffff;
1922 if (strcmp(type
, "s32") == 0)
1923 return (unsigned long long)(int)val
& 0xffffffff;
1925 if (strncmp(type
, "unsigned ", 9) == 0) {
1930 if (strcmp(type
, "char") == 0) {
1932 return (unsigned long long)(char)val
& 0xff;
1937 if (strcmp(type
, "short") == 0) {
1939 return (unsigned long long)(short)val
& 0xffff;
1941 return val
& 0xffff;
1944 if (strcmp(type
, "int") == 0) {
1946 return (unsigned long long)(int)val
& 0xffffffff;
1948 return val
& 0xffffffff;
1955 * Try to figure out the type.
1957 static unsigned long long
1958 eval_type(unsigned long long val
, struct print_arg
*arg
, int pointer
)
1960 if (arg
->type
!= PRINT_TYPE
)
1961 die("expected type argument");
1963 return eval_type_str(val
, arg
->typecast
.type
, pointer
);
1966 static int arg_num_eval(struct print_arg
*arg
, long long *val
)
1968 long long left
, right
;
1971 switch (arg
->type
) {
1973 *val
= strtoll(arg
->atom
.atom
, NULL
, 0);
1976 ret
= arg_num_eval(arg
->typecast
.item
, val
);
1979 *val
= eval_type(*val
, arg
, 0);
1982 switch (arg
->op
.op
[0]) {
1984 ret
= arg_num_eval(arg
->op
.left
, &left
);
1987 ret
= arg_num_eval(arg
->op
.right
, &right
);
1991 *val
= left
|| right
;
1993 *val
= left
| right
;
1996 ret
= arg_num_eval(arg
->op
.left
, &left
);
1999 ret
= arg_num_eval(arg
->op
.right
, &right
);
2003 *val
= left
&& right
;
2005 *val
= left
& right
;
2008 ret
= arg_num_eval(arg
->op
.left
, &left
);
2011 ret
= arg_num_eval(arg
->op
.right
, &right
);
2014 switch (arg
->op
.op
[1]) {
2016 *val
= left
< right
;
2019 *val
= left
<< right
;
2022 *val
= left
<= right
;
2025 do_warning("unknown op '%s'", arg
->op
.op
);
2030 ret
= arg_num_eval(arg
->op
.left
, &left
);
2033 ret
= arg_num_eval(arg
->op
.right
, &right
);
2036 switch (arg
->op
.op
[1]) {
2038 *val
= left
> right
;
2041 *val
= left
>> right
;
2044 *val
= left
>= right
;
2047 do_warning("unknown op '%s'", arg
->op
.op
);
2052 ret
= arg_num_eval(arg
->op
.left
, &left
);
2055 ret
= arg_num_eval(arg
->op
.right
, &right
);
2059 if (arg
->op
.op
[1] != '=') {
2060 do_warning("unknown op '%s'", arg
->op
.op
);
2063 *val
= left
== right
;
2066 ret
= arg_num_eval(arg
->op
.left
, &left
);
2069 ret
= arg_num_eval(arg
->op
.right
, &right
);
2073 switch (arg
->op
.op
[1]) {
2075 *val
= left
!= right
;
2078 do_warning("unknown op '%s'", arg
->op
.op
);
2083 /* check for negative */
2084 if (arg
->op
.left
->type
== PRINT_NULL
)
2087 ret
= arg_num_eval(arg
->op
.left
, &left
);
2090 ret
= arg_num_eval(arg
->op
.right
, &right
);
2093 *val
= left
- right
;
2096 if (arg
->op
.left
->type
== PRINT_NULL
)
2099 ret
= arg_num_eval(arg
->op
.left
, &left
);
2102 ret
= arg_num_eval(arg
->op
.right
, &right
);
2105 *val
= left
+ right
;
2108 do_warning("unknown op '%s'", arg
->op
.op
);
2114 case PRINT_FIELD
... PRINT_SYMBOL
:
2118 do_warning("invalid eval type %d", arg
->type
);
2125 static char *arg_eval (struct print_arg
*arg
)
2128 static char buf
[20];
2130 switch (arg
->type
) {
2132 return arg
->atom
.atom
;
2134 return arg_eval(arg
->typecast
.item
);
2136 if (!arg_num_eval(arg
, &val
))
2138 sprintf(buf
, "%lld", val
);
2142 case PRINT_FIELD
... PRINT_SYMBOL
:
2146 die("invalid eval type %d", arg
->type
);
2153 static enum event_type
2154 process_fields(struct event_format
*event
, struct print_flag_sym
**list
, char **tok
)
2156 enum event_type type
;
2157 struct print_arg
*arg
= NULL
;
2158 struct print_flag_sym
*field
;
2164 type
= read_token_item(&token
);
2165 if (test_type_token(type
, token
, EVENT_OP
, "{"))
2171 type
= process_arg(event
, arg
, &token
);
2173 if (type
== EVENT_OP
)
2174 type
= process_op(event
, arg
, &token
);
2176 if (type
== EVENT_ERROR
)
2179 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2182 field
= malloc_or_die(sizeof(*field
));
2183 memset(field
, 0, sizeof(*field
));
2185 value
= arg_eval(arg
);
2188 field
->value
= strdup(value
);
2189 if (field
->value
== NULL
)
2196 type
= process_arg(event
, arg
, &token
);
2197 if (test_type_token(type
, token
, EVENT_OP
, "}"))
2200 value
= arg_eval(arg
);
2203 field
->str
= strdup(value
);
2204 if (field
->str
== NULL
)
2210 list
= &field
->next
;
2213 type
= read_token_item(&token
);
2214 } while (type
== EVENT_DELIM
&& strcmp(token
, ",") == 0);
2227 static enum event_type
2228 process_flags(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2230 struct print_arg
*field
;
2231 enum event_type type
;
2234 memset(arg
, 0, sizeof(*arg
));
2235 arg
->type
= PRINT_FLAGS
;
2237 field
= alloc_arg();
2239 type
= process_arg(event
, field
, &token
);
2241 /* Handle operations in the first argument */
2242 while (type
== EVENT_OP
)
2243 type
= process_op(event
, field
, &token
);
2245 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2249 arg
->flags
.field
= field
;
2251 type
= read_token_item(&token
);
2252 if (event_item_type(type
)) {
2253 arg
->flags
.delim
= token
;
2254 type
= read_token_item(&token
);
2257 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2260 type
= process_fields(event
, &arg
->flags
.flags
, &token
);
2261 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2265 type
= read_token_item(tok
);
2274 static enum event_type
2275 process_symbols(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2277 struct print_arg
*field
;
2278 enum event_type type
;
2281 memset(arg
, 0, sizeof(*arg
));
2282 arg
->type
= PRINT_SYMBOL
;
2284 field
= alloc_arg();
2286 type
= process_arg(event
, field
, &token
);
2287 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2290 arg
->symbol
.field
= field
;
2292 type
= process_fields(event
, &arg
->symbol
.symbols
, &token
);
2293 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2297 type
= read_token_item(tok
);
2306 static enum event_type
2307 process_hex(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2309 struct print_arg
*field
;
2310 enum event_type type
;
2313 memset(arg
, 0, sizeof(*arg
));
2314 arg
->type
= PRINT_HEX
;
2316 field
= alloc_arg();
2317 type
= process_arg(event
, field
, &token
);
2319 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2322 arg
->hex
.field
= field
;
2326 field
= alloc_arg();
2327 type
= process_arg(event
, field
, &token
);
2329 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2332 arg
->hex
.size
= field
;
2335 type
= read_token_item(tok
);
2345 static enum event_type
2346 process_dynamic_array(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2348 struct format_field
*field
;
2349 enum event_type type
;
2352 memset(arg
, 0, sizeof(*arg
));
2353 arg
->type
= PRINT_DYNAMIC_ARRAY
;
2356 * The item within the parenthesis is another field that holds
2357 * the index into where the array starts.
2359 type
= read_token(&token
);
2361 if (type
!= EVENT_ITEM
)
2364 /* Find the field */
2366 field
= pevent_find_field(event
, token
);
2370 arg
->dynarray
.field
= field
;
2371 arg
->dynarray
.index
= 0;
2373 if (read_expected(EVENT_DELIM
, ")") < 0)
2377 type
= read_token_item(&token
);
2379 if (type
!= EVENT_OP
|| strcmp(token
, "[") != 0)
2384 type
= process_arg(event
, arg
, &token
);
2385 if (type
== EVENT_ERROR
)
2388 if (!test_type_token(type
, token
, EVENT_OP
, "]"))
2392 type
= read_token_item(tok
);
2403 static enum event_type
2404 process_paren(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2406 struct print_arg
*item_arg
;
2407 enum event_type type
;
2410 type
= process_arg(event
, arg
, &token
);
2412 if (type
== EVENT_ERROR
)
2415 if (type
== EVENT_OP
)
2416 type
= process_op(event
, arg
, &token
);
2418 if (type
== EVENT_ERROR
)
2421 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2425 type
= read_token_item(&token
);
2428 * If the next token is an item or another open paren, then
2429 * this was a typecast.
2431 if (event_item_type(type
) ||
2432 (type
== EVENT_DELIM
&& strcmp(token
, "(") == 0)) {
2434 /* make this a typecast and contine */
2436 /* prevous must be an atom */
2437 if (arg
->type
!= PRINT_ATOM
)
2438 die("previous needed to be PRINT_ATOM");
2440 item_arg
= alloc_arg();
2442 arg
->type
= PRINT_TYPE
;
2443 arg
->typecast
.type
= arg
->atom
.atom
;
2444 arg
->typecast
.item
= item_arg
;
2445 type
= process_arg_token(event
, item_arg
, &token
, type
);
2459 static enum event_type
2460 process_str(struct event_format
*event __unused
, struct print_arg
*arg
, char **tok
)
2462 enum event_type type
;
2465 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
2468 arg
->type
= PRINT_STRING
;
2469 arg
->string
.string
= token
;
2470 arg
->string
.offset
= -1;
2472 if (read_expected(EVENT_DELIM
, ")") < 0)
2475 type
= read_token(&token
);
2487 static struct pevent_function_handler
*
2488 find_func_handler(struct pevent
*pevent
, char *func_name
)
2490 struct pevent_function_handler
*func
;
2492 for (func
= pevent
->func_handlers
; func
; func
= func
->next
) {
2493 if (strcmp(func
->name
, func_name
) == 0)
2500 static void remove_func_handler(struct pevent
*pevent
, char *func_name
)
2502 struct pevent_function_handler
*func
;
2503 struct pevent_function_handler
**next
;
2505 next
= &pevent
->func_handlers
;
2506 while ((func
= *next
)) {
2507 if (strcmp(func
->name
, func_name
) == 0) {
2509 free_func_handle(func
);
2516 static enum event_type
2517 process_func_handler(struct event_format
*event
, struct pevent_function_handler
*func
,
2518 struct print_arg
*arg
, char **tok
)
2520 struct print_arg
**next_arg
;
2521 struct print_arg
*farg
;
2522 enum event_type type
;
2527 arg
->type
= PRINT_FUNC
;
2528 arg
->func
.func
= func
;
2532 next_arg
= &(arg
->func
.args
);
2533 for (i
= 0; i
< func
->nr_args
; i
++) {
2535 type
= process_arg(event
, farg
, &token
);
2536 if (i
< (func
->nr_args
- 1))
2541 if (test_type_token(type
, token
, EVENT_DELIM
, test
)) {
2548 next_arg
= &(farg
->next
);
2552 type
= read_token(&token
);
2558 static enum event_type
2559 process_function(struct event_format
*event
, struct print_arg
*arg
,
2560 char *token
, char **tok
)
2562 struct pevent_function_handler
*func
;
2564 if (strcmp(token
, "__print_flags") == 0) {
2567 return process_flags(event
, arg
, tok
);
2569 if (strcmp(token
, "__print_symbolic") == 0) {
2571 is_symbolic_field
= 1;
2572 return process_symbols(event
, arg
, tok
);
2574 if (strcmp(token
, "__print_hex") == 0) {
2576 return process_hex(event
, arg
, tok
);
2578 if (strcmp(token
, "__get_str") == 0) {
2580 return process_str(event
, arg
, tok
);
2582 if (strcmp(token
, "__get_dynamic_array") == 0) {
2584 return process_dynamic_array(event
, arg
, tok
);
2587 func
= find_func_handler(event
->pevent
, token
);
2590 return process_func_handler(event
, func
, arg
, tok
);
2593 do_warning("function %s not defined", token
);
2598 static enum event_type
2599 process_arg_token(struct event_format
*event
, struct print_arg
*arg
,
2600 char **tok
, enum event_type type
)
2609 if (strcmp(token
, "REC") == 0) {
2611 type
= process_entry(event
, arg
, &token
);
2615 /* test the next token */
2616 type
= read_token_item(&token
);
2619 * If the next token is a parenthesis, then this
2622 if (type
== EVENT_DELIM
&& strcmp(token
, "(") == 0) {
2625 /* this will free atom. */
2626 type
= process_function(event
, arg
, atom
, &token
);
2629 /* atoms can be more than one token long */
2630 while (type
== EVENT_ITEM
) {
2632 new_atom
= realloc(atom
,
2633 strlen(atom
) + strlen(token
) + 2);
2642 strcat(atom
, token
);
2644 type
= read_token_item(&token
);
2647 arg
->type
= PRINT_ATOM
;
2648 arg
->atom
.atom
= atom
;
2653 arg
->type
= PRINT_ATOM
;
2654 arg
->atom
.atom
= token
;
2655 type
= read_token_item(&token
);
2658 if (strcmp(token
, "(") == 0) {
2660 type
= process_paren(event
, arg
, &token
);
2664 /* handle single ops */
2665 arg
->type
= PRINT_OP
;
2667 arg
->op
.left
= NULL
;
2668 type
= process_op(event
, arg
, &token
);
2670 /* On error, the op is freed */
2671 if (type
== EVENT_ERROR
)
2674 /* return error type if errored */
2677 case EVENT_ERROR
... EVENT_NEWLINE
:
2679 die("unexpected type %d", type
);
2686 static int event_read_print_args(struct event_format
*event
, struct print_arg
**list
)
2688 enum event_type type
= EVENT_ERROR
;
2689 struct print_arg
*arg
;
2694 if (type
== EVENT_NEWLINE
) {
2695 type
= read_token_item(&token
);
2701 type
= process_arg(event
, arg
, &token
);
2703 if (type
== EVENT_ERROR
) {
2712 if (type
== EVENT_OP
) {
2713 type
= process_op(event
, arg
, &token
);
2715 if (type
== EVENT_ERROR
) {
2724 if (type
== EVENT_DELIM
&& strcmp(token
, ",") == 0) {
2731 } while (type
!= EVENT_NONE
);
2733 if (type
!= EVENT_NONE
&& type
!= EVENT_ERROR
)
2739 static int event_read_print(struct event_format
*event
)
2741 enum event_type type
;
2745 if (read_expected_item(EVENT_ITEM
, "print") < 0)
2748 if (read_expected(EVENT_ITEM
, "fmt") < 0)
2751 if (read_expected(EVENT_OP
, ":") < 0)
2754 if (read_expect_type(EVENT_DQUOTE
, &token
) < 0)
2758 event
->print_fmt
.format
= token
;
2759 event
->print_fmt
.args
= NULL
;
2761 /* ok to have no arg */
2762 type
= read_token_item(&token
);
2764 if (type
== EVENT_NONE
)
2767 /* Handle concatenation of print lines */
2768 if (type
== EVENT_DQUOTE
) {
2771 cat
= malloc_or_die(strlen(event
->print_fmt
.format
) +
2773 strcpy(cat
, event
->print_fmt
.format
);
2776 free_token(event
->print_fmt
.format
);
2777 event
->print_fmt
.format
= NULL
;
2782 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2787 ret
= event_read_print_args(event
, &event
->print_fmt
.args
);
2799 * pevent_find_common_field - return a common field by event
2800 * @event: handle for the event
2801 * @name: the name of the common field to return
2803 * Returns a common field from the event by the given @name.
2804 * This only searchs the common fields and not all field.
2806 struct format_field
*
2807 pevent_find_common_field(struct event_format
*event
, const char *name
)
2809 struct format_field
*format
;
2811 for (format
= event
->format
.common_fields
;
2812 format
; format
= format
->next
) {
2813 if (strcmp(format
->name
, name
) == 0)
2821 * pevent_find_field - find a non-common field
2822 * @event: handle for the event
2823 * @name: the name of the non-common field
2825 * Returns a non-common field by the given @name.
2826 * This does not search common fields.
2828 struct format_field
*
2829 pevent_find_field(struct event_format
*event
, const char *name
)
2831 struct format_field
*format
;
2833 for (format
= event
->format
.fields
;
2834 format
; format
= format
->next
) {
2835 if (strcmp(format
->name
, name
) == 0)
2843 * pevent_find_any_field - find any field by name
2844 * @event: handle for the event
2845 * @name: the name of the field
2847 * Returns a field by the given @name.
2848 * This searchs the common field names first, then
2849 * the non-common ones if a common one was not found.
2851 struct format_field
*
2852 pevent_find_any_field(struct event_format
*event
, const char *name
)
2854 struct format_field
*format
;
2856 format
= pevent_find_common_field(event
, name
);
2859 return pevent_find_field(event
, name
);
2863 * pevent_read_number - read a number from data
2864 * @pevent: handle for the pevent
2865 * @ptr: the raw data
2866 * @size: the size of the data that holds the number
2868 * Returns the number (converted to host) from the
2871 unsigned long long pevent_read_number(struct pevent
*pevent
,
2872 const void *ptr
, int size
)
2876 return *(unsigned char *)ptr
;
2878 return data2host2(pevent
, ptr
);
2880 return data2host4(pevent
, ptr
);
2882 return data2host8(pevent
, ptr
);
2890 * pevent_read_number_field - read a number from data
2891 * @field: a handle to the field
2892 * @data: the raw data to read
2893 * @value: the value to place the number in
2895 * Reads raw data according to a field offset and size,
2896 * and translates it into @value.
2898 * Returns 0 on success, -1 otherwise.
2900 int pevent_read_number_field(struct format_field
*field
, const void *data
,
2901 unsigned long long *value
)
2905 switch (field
->size
) {
2910 *value
= pevent_read_number(field
->event
->pevent
,
2911 data
+ field
->offset
, field
->size
);
2918 static int get_common_info(struct pevent
*pevent
,
2919 const char *type
, int *offset
, int *size
)
2921 struct event_format
*event
;
2922 struct format_field
*field
;
2925 * All events should have the same common elements.
2926 * Pick any event to find where the type is;
2928 if (!pevent
->events
)
2929 die("no event_list!");
2931 event
= pevent
->events
[0];
2932 field
= pevent_find_common_field(event
, type
);
2936 *offset
= field
->offset
;
2937 *size
= field
->size
;
2942 static int __parse_common(struct pevent
*pevent
, void *data
,
2943 int *size
, int *offset
, const char *name
)
2948 ret
= get_common_info(pevent
, name
, offset
, size
);
2952 return pevent_read_number(pevent
, data
+ *offset
, *size
);
2955 static int trace_parse_common_type(struct pevent
*pevent
, void *data
)
2957 return __parse_common(pevent
, data
,
2958 &pevent
->type_size
, &pevent
->type_offset
,
2962 static int parse_common_pid(struct pevent
*pevent
, void *data
)
2964 return __parse_common(pevent
, data
,
2965 &pevent
->pid_size
, &pevent
->pid_offset
,
2969 static int parse_common_pc(struct pevent
*pevent
, void *data
)
2971 return __parse_common(pevent
, data
,
2972 &pevent
->pc_size
, &pevent
->pc_offset
,
2973 "common_preempt_count");
2976 static int parse_common_flags(struct pevent
*pevent
, void *data
)
2978 return __parse_common(pevent
, data
,
2979 &pevent
->flags_size
, &pevent
->flags_offset
,
2983 static int parse_common_lock_depth(struct pevent
*pevent
, void *data
)
2985 return __parse_common(pevent
, data
,
2986 &pevent
->ld_size
, &pevent
->ld_offset
,
2987 "common_lock_depth");
2990 static int parse_common_migrate_disable(struct pevent
*pevent
, void *data
)
2992 return __parse_common(pevent
, data
,
2993 &pevent
->ld_size
, &pevent
->ld_offset
,
2994 "common_migrate_disable");
2997 static int events_id_cmp(const void *a
, const void *b
);
3000 * pevent_find_event - find an event by given id
3001 * @pevent: a handle to the pevent
3002 * @id: the id of the event
3004 * Returns an event that has a given @id.
3006 struct event_format
*pevent_find_event(struct pevent
*pevent
, int id
)
3008 struct event_format
**eventptr
;
3009 struct event_format key
;
3010 struct event_format
*pkey
= &key
;
3012 /* Check cache first */
3013 if (pevent
->last_event
&& pevent
->last_event
->id
== id
)
3014 return pevent
->last_event
;
3018 eventptr
= bsearch(&pkey
, pevent
->events
, pevent
->nr_events
,
3019 sizeof(*pevent
->events
), events_id_cmp
);
3022 pevent
->last_event
= *eventptr
;
3030 * pevent_find_event_by_name - find an event by given name
3031 * @pevent: a handle to the pevent
3032 * @sys: the system name to search for
3033 * @name: the name of the event to search for
3035 * This returns an event with a given @name and under the system
3036 * @sys. If @sys is NULL the first event with @name is returned.
3038 struct event_format
*
3039 pevent_find_event_by_name(struct pevent
*pevent
,
3040 const char *sys
, const char *name
)
3042 struct event_format
*event
;
3045 if (pevent
->last_event
&&
3046 strcmp(pevent
->last_event
->name
, name
) == 0 &&
3047 (!sys
|| strcmp(pevent
->last_event
->system
, sys
) == 0))
3048 return pevent
->last_event
;
3050 for (i
= 0; i
< pevent
->nr_events
; i
++) {
3051 event
= pevent
->events
[i
];
3052 if (strcmp(event
->name
, name
) == 0) {
3055 if (strcmp(event
->system
, sys
) == 0)
3059 if (i
== pevent
->nr_events
)
3062 pevent
->last_event
= event
;
3066 static unsigned long long
3067 eval_num_arg(void *data
, int size
, struct event_format
*event
, struct print_arg
*arg
)
3069 struct pevent
*pevent
= event
->pevent
;
3070 unsigned long long val
= 0;
3071 unsigned long long left
, right
;
3072 struct print_arg
*typearg
= NULL
;
3073 struct print_arg
*larg
;
3074 unsigned long offset
;
3075 unsigned int field_size
;
3077 switch (arg
->type
) {
3082 return strtoull(arg
->atom
.atom
, NULL
, 0);
3084 if (!arg
->field
.field
) {
3085 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
3086 if (!arg
->field
.field
)
3087 die("field %s not found", arg
->field
.name
);
3089 /* must be a number */
3090 val
= pevent_read_number(pevent
, data
+ arg
->field
.field
->offset
,
3091 arg
->field
.field
->size
);
3098 val
= eval_num_arg(data
, size
, event
, arg
->typecast
.item
);
3099 return eval_type(val
, arg
, 0);
3106 val
= process_defined_func(&s
, data
, size
, event
, arg
);
3107 trace_seq_destroy(&s
);
3111 if (strcmp(arg
->op
.op
, "[") == 0) {
3113 * Arrays are special, since we don't want
3114 * to read the arg as is.
3116 right
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3118 /* handle typecasts */
3119 larg
= arg
->op
.left
;
3120 while (larg
->type
== PRINT_TYPE
) {
3123 larg
= larg
->typecast
.item
;
3126 /* Default to long size */
3127 field_size
= pevent
->long_size
;
3129 switch (larg
->type
) {
3130 case PRINT_DYNAMIC_ARRAY
:
3131 offset
= pevent_read_number(pevent
,
3132 data
+ larg
->dynarray
.field
->offset
,
3133 larg
->dynarray
.field
->size
);
3134 if (larg
->dynarray
.field
->elementsize
)
3135 field_size
= larg
->dynarray
.field
->elementsize
;
3137 * The actual length of the dynamic array is stored
3138 * in the top half of the field, and the offset
3139 * is in the bottom half of the 32 bit field.
3145 if (!larg
->field
.field
) {
3147 pevent_find_any_field(event
, larg
->field
.name
);
3148 if (!larg
->field
.field
)
3149 die("field %s not found", larg
->field
.name
);
3151 field_size
= larg
->field
.field
->elementsize
;
3152 offset
= larg
->field
.field
->offset
+
3153 right
* larg
->field
.field
->elementsize
;
3156 goto default_op
; /* oops, all bets off */
3158 val
= pevent_read_number(pevent
,
3159 data
+ offset
, field_size
);
3161 val
= eval_type(val
, typearg
, 1);
3163 } else if (strcmp(arg
->op
.op
, "?") == 0) {
3164 left
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3165 arg
= arg
->op
.right
;
3167 val
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3169 val
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3173 left
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3174 right
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3175 switch (arg
->op
.op
[0]) {
3177 switch (arg
->op
.op
[1]) {
3182 val
= left
!= right
;
3185 die("unknown op '%s'", arg
->op
.op
);
3193 val
= left
|| right
;
3199 val
= left
&& right
;
3204 switch (arg
->op
.op
[1]) {
3209 val
= left
<< right
;
3212 val
= left
<= right
;
3215 die("unknown op '%s'", arg
->op
.op
);
3219 switch (arg
->op
.op
[1]) {
3224 val
= left
>> right
;
3227 val
= left
>= right
;
3230 die("unknown op '%s'", arg
->op
.op
);
3234 if (arg
->op
.op
[1] != '=')
3235 die("unknown op '%s'", arg
->op
.op
);
3236 val
= left
== right
;
3251 die("unknown op '%s'", arg
->op
.op
);
3254 default: /* not sure what to do there */
3262 unsigned long long value
;
3265 static const struct flag flags
[] = {
3266 { "HI_SOFTIRQ", 0 },
3267 { "TIMER_SOFTIRQ", 1 },
3268 { "NET_TX_SOFTIRQ", 2 },
3269 { "NET_RX_SOFTIRQ", 3 },
3270 { "BLOCK_SOFTIRQ", 4 },
3271 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3272 { "TASKLET_SOFTIRQ", 6 },
3273 { "SCHED_SOFTIRQ", 7 },
3274 { "HRTIMER_SOFTIRQ", 8 },
3275 { "RCU_SOFTIRQ", 9 },
3277 { "HRTIMER_NORESTART", 0 },
3278 { "HRTIMER_RESTART", 1 },
3281 static unsigned long long eval_flag(const char *flag
)
3286 * Some flags in the format files do not get converted.
3287 * If the flag is not numeric, see if it is something that
3288 * we already know about.
3290 if (isdigit(flag
[0]))
3291 return strtoull(flag
, NULL
, 0);
3293 for (i
= 0; i
< (int)(sizeof(flags
)/sizeof(flags
[0])); i
++)
3294 if (strcmp(flags
[i
].name
, flag
) == 0)
3295 return flags
[i
].value
;
3300 static void print_str_to_seq(struct trace_seq
*s
, const char *format
,
3301 int len_arg
, const char *str
)
3304 trace_seq_printf(s
, format
, len_arg
, str
);
3306 trace_seq_printf(s
, format
, str
);
3309 static void print_str_arg(struct trace_seq
*s
, void *data
, int size
,
3310 struct event_format
*event
, const char *format
,
3311 int len_arg
, struct print_arg
*arg
)
3313 struct pevent
*pevent
= event
->pevent
;
3314 struct print_flag_sym
*flag
;
3315 struct format_field
*field
;
3316 unsigned long long val
, fval
;
3323 switch (arg
->type
) {
3328 print_str_to_seq(s
, format
, len_arg
, arg
->atom
.atom
);
3331 field
= arg
->field
.field
;
3333 field
= pevent_find_any_field(event
, arg
->field
.name
);
3335 die("field %s not found", arg
->field
.name
);
3336 arg
->field
.field
= field
;
3338 /* Zero sized fields, mean the rest of the data */
3339 len
= field
->size
? : size
- field
->offset
;
3342 * Some events pass in pointers. If this is not an array
3343 * and the size is the same as long_size, assume that it
3346 if (!(field
->flags
& FIELD_IS_ARRAY
) &&
3347 field
->size
== pevent
->long_size
) {
3348 addr
= *(unsigned long *)(data
+ field
->offset
);
3349 trace_seq_printf(s
, "%lx", addr
);
3352 str
= malloc_or_die(len
+ 1);
3353 memcpy(str
, data
+ field
->offset
, len
);
3355 print_str_to_seq(s
, format
, len_arg
, str
);
3359 val
= eval_num_arg(data
, size
, event
, arg
->flags
.field
);
3361 for (flag
= arg
->flags
.flags
; flag
; flag
= flag
->next
) {
3362 fval
= eval_flag(flag
->value
);
3363 if (!val
&& !fval
) {
3364 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3367 if (fval
&& (val
& fval
) == fval
) {
3368 if (print
&& arg
->flags
.delim
)
3369 trace_seq_puts(s
, arg
->flags
.delim
);
3370 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3377 val
= eval_num_arg(data
, size
, event
, arg
->symbol
.field
);
3378 for (flag
= arg
->symbol
.symbols
; flag
; flag
= flag
->next
) {
3379 fval
= eval_flag(flag
->value
);
3381 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3387 field
= arg
->hex
.field
->field
.field
;
3389 str
= arg
->hex
.field
->field
.name
;
3390 field
= pevent_find_any_field(event
, str
);
3392 die("field %s not found", str
);
3393 arg
->hex
.field
->field
.field
= field
;
3395 hex
= data
+ field
->offset
;
3396 len
= eval_num_arg(data
, size
, event
, arg
->hex
.size
);
3397 for (i
= 0; i
< len
; i
++) {
3399 trace_seq_putc(s
, ' ');
3400 trace_seq_printf(s
, "%02x", hex
[i
]);
3406 case PRINT_STRING
: {
3409 if (arg
->string
.offset
== -1) {
3410 struct format_field
*f
;
3412 f
= pevent_find_any_field(event
, arg
->string
.string
);
3413 arg
->string
.offset
= f
->offset
;
3415 str_offset
= data2host4(pevent
, data
+ arg
->string
.offset
);
3416 str_offset
&= 0xffff;
3417 print_str_to_seq(s
, format
, len_arg
, ((char *)data
) + str_offset
);
3421 print_str_to_seq(s
, format
, len_arg
, arg
->string
.string
);
3425 * The only op for string should be ? :
3427 if (arg
->op
.op
[0] != '?')
3429 val
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3431 print_str_arg(s
, data
, size
, event
,
3432 format
, len_arg
, arg
->op
.right
->op
.left
);
3434 print_str_arg(s
, data
, size
, event
,
3435 format
, len_arg
, arg
->op
.right
->op
.right
);
3438 process_defined_func(s
, data
, size
, event
, arg
);
3446 static unsigned long long
3447 process_defined_func(struct trace_seq
*s
, void *data
, int size
,
3448 struct event_format
*event
, struct print_arg
*arg
)
3450 struct pevent_function_handler
*func_handle
= arg
->func
.func
;
3451 struct pevent_func_params
*param
;
3452 unsigned long long *args
;
3453 unsigned long long ret
;
3454 struct print_arg
*farg
;
3455 struct trace_seq str
;
3457 struct save_str
*next
;
3459 } *strings
= NULL
, *string
;
3462 if (!func_handle
->nr_args
) {
3463 ret
= (*func_handle
->func
)(s
, NULL
);
3467 farg
= arg
->func
.args
;
3468 param
= func_handle
->params
;
3470 args
= malloc_or_die(sizeof(*args
) * func_handle
->nr_args
);
3471 for (i
= 0; i
< func_handle
->nr_args
; i
++) {
3472 switch (param
->type
) {
3473 case PEVENT_FUNC_ARG_INT
:
3474 case PEVENT_FUNC_ARG_LONG
:
3475 case PEVENT_FUNC_ARG_PTR
:
3476 args
[i
] = eval_num_arg(data
, size
, event
, farg
);
3478 case PEVENT_FUNC_ARG_STRING
:
3479 trace_seq_init(&str
);
3480 print_str_arg(&str
, data
, size
, event
, "%s", -1, farg
);
3481 trace_seq_terminate(&str
);
3482 string
= malloc_or_die(sizeof(*string
));
3483 string
->next
= strings
;
3484 string
->str
= strdup(str
.buffer
);
3488 args
[i
] = (unsigned long long)string
->str
;
3490 trace_seq_destroy(&str
);
3494 * Something went totally wrong, this is not
3495 * an input error, something in this code broke.
3497 die("Unexpected end of arguments\n");
3501 param
= param
->next
;
3504 ret
= (*func_handle
->func
)(s
, args
);
3508 strings
= string
->next
;
3514 /* TBD : handle return type here */
3518 static struct print_arg
*make_bprint_args(char *fmt
, void *data
, int size
, struct event_format
*event
)
3520 struct pevent
*pevent
= event
->pevent
;
3521 struct format_field
*field
, *ip_field
;
3522 struct print_arg
*args
, *arg
, **next
;
3523 unsigned long long ip
, val
;
3528 field
= pevent
->bprint_buf_field
;
3529 ip_field
= pevent
->bprint_ip_field
;
3532 field
= pevent_find_field(event
, "buf");
3534 die("can't find buffer field for binary printk");
3535 ip_field
= pevent_find_field(event
, "ip");
3537 die("can't find ip field for binary printk");
3538 pevent
->bprint_buf_field
= field
;
3539 pevent
->bprint_ip_field
= ip_field
;
3542 ip
= pevent_read_number(pevent
, data
+ ip_field
->offset
, ip_field
->size
);
3545 * The first arg is the IP pointer.
3552 arg
->type
= PRINT_ATOM
;
3553 arg
->atom
.atom
= malloc_or_die(32);
3554 sprintf(arg
->atom
.atom
, "%lld", ip
);
3556 /* skip the first "%pf : " */
3557 for (ptr
= fmt
+ 6, bptr
= data
+ field
->offset
;
3558 bptr
< data
+ size
&& *ptr
; ptr
++) {
3589 vsize
= pevent
->long_size
;
3603 /* the pointers are always 4 bytes aligned */
3604 bptr
= (void *)(((unsigned long)bptr
+ 3) &
3606 val
= pevent_read_number(pevent
, bptr
, vsize
);
3610 arg
->type
= PRINT_ATOM
;
3611 arg
->atom
.atom
= malloc_or_die(32);
3612 sprintf(arg
->atom
.atom
, "%lld", val
);
3616 * The '*' case means that an arg is used as the length.
3617 * We need to continue to figure out for what.
3626 arg
->type
= PRINT_BSTRING
;
3627 arg
->string
.string
= strdup(bptr
);
3628 if (!arg
->string
.string
)
3630 bptr
+= strlen(bptr
) + 1;
3642 static void free_args(struct print_arg
*args
)
3644 struct print_arg
*next
;
3655 get_bprint_format(void *data
, int size __unused
, struct event_format
*event
)
3657 struct pevent
*pevent
= event
->pevent
;
3658 unsigned long long addr
;
3659 struct format_field
*field
;
3660 struct printk_map
*printk
;
3664 field
= pevent
->bprint_fmt_field
;
3667 field
= pevent_find_field(event
, "fmt");
3669 die("can't find format field for binary printk");
3670 pevent
->bprint_fmt_field
= field
;
3673 addr
= pevent_read_number(pevent
, data
+ field
->offset
, field
->size
);
3675 printk
= find_printk(pevent
, addr
);
3677 format
= malloc_or_die(45);
3678 sprintf(format
, "%%pf : (NO FORMAT FOUND at %llx)\n",
3684 /* Remove any quotes. */
3687 format
= malloc_or_die(strlen(p
) + 10);
3688 sprintf(format
, "%s : %s", "%pf", p
);
3689 /* remove ending quotes and new line since we will add one too */
3690 p
= format
+ strlen(format
) - 1;
3695 if (strcmp(p
, "\\n") == 0)
3701 static void print_mac_arg(struct trace_seq
*s
, int mac
, void *data
, int size
,
3702 struct event_format
*event
, struct print_arg
*arg
)
3705 char *fmt
= "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3707 if (arg
->type
== PRINT_FUNC
) {
3708 process_defined_func(s
, data
, size
, event
, arg
);
3712 if (arg
->type
!= PRINT_FIELD
) {
3713 trace_seq_printf(s
, "ARG TYPE NOT FIELD BUT %d",
3719 fmt
= "%.2x%.2x%.2x%.2x%.2x%.2x";
3720 if (!arg
->field
.field
) {
3722 pevent_find_any_field(event
, arg
->field
.name
);
3723 if (!arg
->field
.field
)
3724 die("field %s not found", arg
->field
.name
);
3726 if (arg
->field
.field
->size
!= 6) {
3727 trace_seq_printf(s
, "INVALIDMAC");
3730 buf
= data
+ arg
->field
.field
->offset
;
3731 trace_seq_printf(s
, fmt
, buf
[0], buf
[1], buf
[2], buf
[3], buf
[4], buf
[5]);
3734 static int is_printable_array(char *p
, unsigned int len
)
3738 for (i
= 0; i
< len
&& p
[i
]; i
++)
3744 static void print_event_fields(struct trace_seq
*s
, void *data
, int size
,
3745 struct event_format
*event
)
3747 struct format_field
*field
;
3748 unsigned long long val
;
3749 unsigned int offset
, len
, i
;
3751 field
= event
->format
.fields
;
3753 trace_seq_printf(s
, " %s=", field
->name
);
3754 if (field
->flags
& FIELD_IS_ARRAY
) {
3755 offset
= field
->offset
;
3757 if (field
->flags
& FIELD_IS_DYNAMIC
) {
3758 val
= pevent_read_number(event
->pevent
, data
+ offset
, len
);
3763 if (field
->flags
& FIELD_IS_STRING
&&
3764 is_printable_array(data
+ offset
, len
)) {
3765 trace_seq_printf(s
, "%s", (char *)data
+ offset
);
3767 trace_seq_puts(s
, "ARRAY[");
3768 for (i
= 0; i
< len
; i
++) {
3770 trace_seq_puts(s
, ", ");
3771 trace_seq_printf(s
, "%02x",
3772 *((unsigned char *)data
+ offset
+ i
));
3774 trace_seq_putc(s
, ']');
3775 field
->flags
&= ~FIELD_IS_STRING
;
3778 val
= pevent_read_number(event
->pevent
, data
+ field
->offset
,
3780 if (field
->flags
& FIELD_IS_POINTER
) {
3781 trace_seq_printf(s
, "0x%llx", val
);
3782 } else if (field
->flags
& FIELD_IS_SIGNED
) {
3783 switch (field
->size
) {
3786 * If field is long then print it in hex.
3787 * A long usually stores pointers.
3789 if (field
->flags
& FIELD_IS_LONG
)
3790 trace_seq_printf(s
, "0x%x", (int)val
);
3792 trace_seq_printf(s
, "%d", (int)val
);
3795 trace_seq_printf(s
, "%2d", (short)val
);
3798 trace_seq_printf(s
, "%1d", (char)val
);
3801 trace_seq_printf(s
, "%lld", val
);
3804 if (field
->flags
& FIELD_IS_LONG
)
3805 trace_seq_printf(s
, "0x%llx", val
);
3807 trace_seq_printf(s
, "%llu", val
);
3810 field
= field
->next
;
3814 static void pretty_print(struct trace_seq
*s
, void *data
, int size
, struct event_format
*event
)
3816 struct pevent
*pevent
= event
->pevent
;
3817 struct print_fmt
*print_fmt
= &event
->print_fmt
;
3818 struct print_arg
*arg
= print_fmt
->args
;
3819 struct print_arg
*args
= NULL
;
3820 const char *ptr
= print_fmt
->format
;
3821 unsigned long long val
;
3822 struct func_map
*func
;
3823 const char *saveptr
;
3824 char *bprint_fmt
= NULL
;
3832 if (event
->flags
& EVENT_FL_FAILED
) {
3833 trace_seq_printf(s
, "[FAILED TO PARSE]");
3834 print_event_fields(s
, data
, size
, event
);
3838 if (event
->flags
& EVENT_FL_ISBPRINT
) {
3839 bprint_fmt
= get_bprint_format(data
, size
, event
);
3840 args
= make_bprint_args(bprint_fmt
, data
, size
, event
);
3845 for (; *ptr
; ptr
++) {
3851 trace_seq_putc(s
, '\n');
3854 trace_seq_putc(s
, '\t');
3857 trace_seq_putc(s
, '\r');
3860 trace_seq_putc(s
, '\\');
3863 trace_seq_putc(s
, *ptr
);
3867 } else if (*ptr
== '%') {
3875 trace_seq_putc(s
, '%');
3878 /* FIXME: need to handle properly */
3890 /* The argument is the length. */
3892 die("no argument match");
3893 len_arg
= eval_num_arg(data
, size
, event
, arg
);
3903 if (pevent
->long_size
== 4)
3908 if (*(ptr
+1) == 'F' ||
3912 } else if (*(ptr
+1) == 'M' || *(ptr
+1) == 'm') {
3913 print_mac_arg(s
, *(ptr
+1), data
, size
, event
, arg
);
3926 die("no argument match");
3928 len
= ((unsigned long)ptr
+ 1) -
3929 (unsigned long)saveptr
;
3931 /* should never happen */
3935 memcpy(format
, saveptr
, len
);
3938 val
= eval_num_arg(data
, size
, event
, arg
);
3942 func
= find_func(pevent
, val
);
3944 trace_seq_puts(s
, func
->func
);
3945 if (show_func
== 'F')
3952 if (pevent
->long_size
== 8 && ls
&&
3953 sizeof(long) != 8) {
3957 /* make %l into %ll */
3958 p
= strchr(format
, 'l');
3960 memmove(p
+1, p
, strlen(p
)+1);
3961 else if (strcmp(format
, "%p") == 0)
3962 strcpy(format
, "0x%llx");
3967 trace_seq_printf(s
, format
, len_arg
, (char)val
);
3969 trace_seq_printf(s
, format
, (char)val
);
3973 trace_seq_printf(s
, format
, len_arg
, (short)val
);
3975 trace_seq_printf(s
, format
, (short)val
);
3979 trace_seq_printf(s
, format
, len_arg
, (int)val
);
3981 trace_seq_printf(s
, format
, (int)val
);
3985 trace_seq_printf(s
, format
, len_arg
, (long)val
);
3987 trace_seq_printf(s
, format
, (long)val
);
3991 trace_seq_printf(s
, format
, len_arg
,
3994 trace_seq_printf(s
, format
, (long long)val
);
3997 die("bad count (%d)", ls
);
4002 die("no matching argument");
4004 len
= ((unsigned long)ptr
+ 1) -
4005 (unsigned long)saveptr
;
4007 /* should never happen */
4011 memcpy(format
, saveptr
, len
);
4015 print_str_arg(s
, data
, size
, event
,
4016 format
, len_arg
, arg
);
4020 trace_seq_printf(s
, ">%c<", *ptr
);
4024 trace_seq_putc(s
, *ptr
);
4034 * pevent_data_lat_fmt - parse the data for the latency format
4035 * @pevent: a handle to the pevent
4036 * @s: the trace_seq to write to
4037 * @record: the record to read from
4039 * This parses out the Latency format (interrupts disabled,
4040 * need rescheduling, in hard/soft interrupt, preempt count
4041 * and lock depth) and places it into the trace_seq.
4043 void pevent_data_lat_fmt(struct pevent
*pevent
,
4044 struct trace_seq
*s
, struct pevent_record
*record
)
4046 static int check_lock_depth
= 1;
4047 static int check_migrate_disable
= 1;
4048 static int lock_depth_exists
;
4049 static int migrate_disable_exists
;
4050 unsigned int lat_flags
;
4053 int migrate_disable
;
4056 void *data
= record
->data
;
4058 lat_flags
= parse_common_flags(pevent
, data
);
4059 pc
= parse_common_pc(pevent
, data
);
4060 /* lock_depth may not always exist */
4061 if (lock_depth_exists
)
4062 lock_depth
= parse_common_lock_depth(pevent
, data
);
4063 else if (check_lock_depth
) {
4064 lock_depth
= parse_common_lock_depth(pevent
, data
);
4066 check_lock_depth
= 0;
4068 lock_depth_exists
= 1;
4071 /* migrate_disable may not always exist */
4072 if (migrate_disable_exists
)
4073 migrate_disable
= parse_common_migrate_disable(pevent
, data
);
4074 else if (check_migrate_disable
) {
4075 migrate_disable
= parse_common_migrate_disable(pevent
, data
);
4076 if (migrate_disable
< 0)
4077 check_migrate_disable
= 0;
4079 migrate_disable_exists
= 1;
4082 hardirq
= lat_flags
& TRACE_FLAG_HARDIRQ
;
4083 softirq
= lat_flags
& TRACE_FLAG_SOFTIRQ
;
4085 trace_seq_printf(s
, "%c%c%c",
4086 (lat_flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
4087 (lat_flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ?
4089 (lat_flags
& TRACE_FLAG_NEED_RESCHED
) ?
4091 (hardirq
&& softirq
) ? 'H' :
4092 hardirq
? 'h' : softirq
? 's' : '.');
4095 trace_seq_printf(s
, "%x", pc
);
4097 trace_seq_putc(s
, '.');
4099 if (migrate_disable_exists
) {
4100 if (migrate_disable
< 0)
4101 trace_seq_putc(s
, '.');
4103 trace_seq_printf(s
, "%d", migrate_disable
);
4106 if (lock_depth_exists
) {
4108 trace_seq_putc(s
, '.');
4110 trace_seq_printf(s
, "%d", lock_depth
);
4113 trace_seq_terminate(s
);
4117 * pevent_data_type - parse out the given event type
4118 * @pevent: a handle to the pevent
4119 * @rec: the record to read from
4121 * This returns the event id from the @rec.
4123 int pevent_data_type(struct pevent
*pevent
, struct pevent_record
*rec
)
4125 return trace_parse_common_type(pevent
, rec
->data
);
4129 * pevent_data_event_from_type - find the event by a given type
4130 * @pevent: a handle to the pevent
4131 * @type: the type of the event.
4133 * This returns the event form a given @type;
4135 struct event_format
*pevent_data_event_from_type(struct pevent
*pevent
, int type
)
4137 return pevent_find_event(pevent
, type
);
4141 * pevent_data_pid - parse the PID from raw data
4142 * @pevent: a handle to the pevent
4143 * @rec: the record to parse
4145 * This returns the PID from a raw data.
4147 int pevent_data_pid(struct pevent
*pevent
, struct pevent_record
*rec
)
4149 return parse_common_pid(pevent
, rec
->data
);
4153 * pevent_data_comm_from_pid - return the command line from PID
4154 * @pevent: a handle to the pevent
4155 * @pid: the PID of the task to search for
4157 * This returns a pointer to the command line that has the given
4160 const char *pevent_data_comm_from_pid(struct pevent
*pevent
, int pid
)
4164 comm
= find_cmdline(pevent
, pid
);
4169 * pevent_data_comm_from_pid - parse the data into the print format
4170 * @s: the trace_seq to write to
4171 * @event: the handle to the event
4172 * @record: the record to read from
4174 * This parses the raw @data using the given @event information and
4175 * writes the print format into the trace_seq.
4177 void pevent_event_info(struct trace_seq
*s
, struct event_format
*event
,
4178 struct pevent_record
*record
)
4180 int print_pretty
= 1;
4182 if (event
->pevent
->print_raw
)
4183 print_event_fields(s
, record
->data
, record
->size
, event
);
4187 print_pretty
= event
->handler(s
, record
, event
,
4191 pretty_print(s
, record
->data
, record
->size
, event
);
4194 trace_seq_terminate(s
);
4197 void pevent_print_event(struct pevent
*pevent
, struct trace_seq
*s
,
4198 struct pevent_record
*record
)
4200 static char *spaces
= " "; /* 20 spaces */
4201 struct event_format
*event
;
4203 unsigned long usecs
;
4204 unsigned long nsecs
;
4206 void *data
= record
->data
;
4212 secs
= record
->ts
/ NSECS_PER_SEC
;
4213 nsecs
= record
->ts
- secs
* NSECS_PER_SEC
;
4215 if (record
->size
< 0) {
4216 do_warning("ug! negative record size %d", record
->size
);
4220 type
= trace_parse_common_type(pevent
, data
);
4222 event
= pevent_find_event(pevent
, type
);
4224 do_warning("ug! no event found for type %d", type
);
4228 pid
= parse_common_pid(pevent
, data
);
4229 comm
= find_cmdline(pevent
, pid
);
4231 if (pevent
->latency_format
) {
4232 trace_seq_printf(s
, "%8.8s-%-5d %3d",
4233 comm
, pid
, record
->cpu
);
4234 pevent_data_lat_fmt(pevent
, s
, record
);
4236 trace_seq_printf(s
, "%16s-%-5d [%03d]", comm
, pid
, record
->cpu
);
4238 if (pevent
->flags
& PEVENT_NSEC_OUTPUT
) {
4242 usecs
= (nsecs
+ 500) / NSECS_PER_USEC
;
4246 trace_seq_printf(s
, " %5lu.%0*lu: %s: ", secs
, p
, usecs
, event
->name
);
4248 /* Space out the event names evenly. */
4249 len
= strlen(event
->name
);
4251 trace_seq_printf(s
, "%.*s", 20 - len
, spaces
);
4253 pevent_event_info(s
, event
, record
);
4256 static int events_id_cmp(const void *a
, const void *b
)
4258 struct event_format
* const * ea
= a
;
4259 struct event_format
* const * eb
= b
;
4261 if ((*ea
)->id
< (*eb
)->id
)
4264 if ((*ea
)->id
> (*eb
)->id
)
4270 static int events_name_cmp(const void *a
, const void *b
)
4272 struct event_format
* const * ea
= a
;
4273 struct event_format
* const * eb
= b
;
4276 res
= strcmp((*ea
)->name
, (*eb
)->name
);
4280 res
= strcmp((*ea
)->system
, (*eb
)->system
);
4284 return events_id_cmp(a
, b
);
4287 static int events_system_cmp(const void *a
, const void *b
)
4289 struct event_format
* const * ea
= a
;
4290 struct event_format
* const * eb
= b
;
4293 res
= strcmp((*ea
)->system
, (*eb
)->system
);
4297 res
= strcmp((*ea
)->name
, (*eb
)->name
);
4301 return events_id_cmp(a
, b
);
4304 struct event_format
**pevent_list_events(struct pevent
*pevent
, enum event_sort_type sort_type
)
4306 struct event_format
**events
;
4307 int (*sort
)(const void *a
, const void *b
);
4309 events
= pevent
->sort_events
;
4311 if (events
&& pevent
->last_type
== sort_type
)
4315 events
= malloc(sizeof(*events
) * (pevent
->nr_events
+ 1));
4319 memcpy(events
, pevent
->events
, sizeof(*events
) * pevent
->nr_events
);
4320 events
[pevent
->nr_events
] = NULL
;
4322 pevent
->sort_events
= events
;
4324 /* the internal events are sorted by id */
4325 if (sort_type
== EVENT_SORT_ID
) {
4326 pevent
->last_type
= sort_type
;
4331 switch (sort_type
) {
4333 sort
= events_id_cmp
;
4335 case EVENT_SORT_NAME
:
4336 sort
= events_name_cmp
;
4338 case EVENT_SORT_SYSTEM
:
4339 sort
= events_system_cmp
;
4345 qsort(events
, pevent
->nr_events
, sizeof(*events
), sort
);
4346 pevent
->last_type
= sort_type
;
4351 static struct format_field
**
4352 get_event_fields(const char *type
, const char *name
,
4353 int count
, struct format_field
*list
)
4355 struct format_field
**fields
;
4356 struct format_field
*field
;
4359 fields
= malloc_or_die(sizeof(*fields
) * (count
+ 1));
4360 for (field
= list
; field
; field
= field
->next
) {
4361 fields
[i
++] = field
;
4362 if (i
== count
+ 1) {
4363 do_warning("event %s has more %s fields than specified",
4371 do_warning("event %s has less %s fields than specified",
4380 * pevent_event_common_fields - return a list of common fields for an event
4381 * @event: the event to return the common fields of.
4383 * Returns an allocated array of fields. The last item in the array is NULL.
4384 * The array must be freed with free().
4386 struct format_field
**pevent_event_common_fields(struct event_format
*event
)
4388 return get_event_fields("common", event
->name
,
4389 event
->format
.nr_common
,
4390 event
->format
.common_fields
);
4394 * pevent_event_fields - return a list of event specific fields for an event
4395 * @event: the event to return the fields of.
4397 * Returns an allocated array of fields. The last item in the array is NULL.
4398 * The array must be freed with free().
4400 struct format_field
**pevent_event_fields(struct event_format
*event
)
4402 return get_event_fields("event", event
->name
,
4403 event
->format
.nr_fields
,
4404 event
->format
.fields
);
4407 static void print_fields(struct trace_seq
*s
, struct print_flag_sym
*field
)
4409 trace_seq_printf(s
, "{ %s, %s }", field
->value
, field
->str
);
4411 trace_seq_puts(s
, ", ");
4412 print_fields(s
, field
->next
);
4417 static void print_args(struct print_arg
*args
)
4419 int print_paren
= 1;
4422 switch (args
->type
) {
4427 printf("%s", args
->atom
.atom
);
4430 printf("REC->%s", args
->field
.name
);
4433 printf("__print_flags(");
4434 print_args(args
->flags
.field
);
4435 printf(", %s, ", args
->flags
.delim
);
4437 print_fields(&s
, args
->flags
.flags
);
4438 trace_seq_do_printf(&s
);
4439 trace_seq_destroy(&s
);
4443 printf("__print_symbolic(");
4444 print_args(args
->symbol
.field
);
4447 print_fields(&s
, args
->symbol
.symbols
);
4448 trace_seq_do_printf(&s
);
4449 trace_seq_destroy(&s
);
4453 printf("__print_hex(");
4454 print_args(args
->hex
.field
);
4456 print_args(args
->hex
.size
);
4461 printf("__get_str(%s)", args
->string
.string
);
4464 printf("(%s)", args
->typecast
.type
);
4465 print_args(args
->typecast
.item
);
4468 if (strcmp(args
->op
.op
, ":") == 0)
4472 print_args(args
->op
.left
);
4473 printf(" %s ", args
->op
.op
);
4474 print_args(args
->op
.right
);
4479 /* we should warn... */
4484 print_args(args
->next
);
4488 static void parse_header_field(const char *field
,
4489 int *offset
, int *size
, int mandatory
)
4491 unsigned long long save_input_buf_ptr
;
4492 unsigned long long save_input_buf_siz
;
4496 save_input_buf_ptr
= input_buf_ptr
;
4497 save_input_buf_siz
= input_buf_siz
;
4499 if (read_expected(EVENT_ITEM
, "field") < 0)
4501 if (read_expected(EVENT_OP
, ":") < 0)
4505 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4510 * If this is not a mandatory field, then test it first.
4513 if (read_expected(EVENT_ITEM
, field
) < 0)
4516 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4518 if (strcmp(token
, field
) != 0)
4523 if (read_expected(EVENT_OP
, ";") < 0)
4525 if (read_expected(EVENT_ITEM
, "offset") < 0)
4527 if (read_expected(EVENT_OP
, ":") < 0)
4529 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4531 *offset
= atoi(token
);
4533 if (read_expected(EVENT_OP
, ";") < 0)
4535 if (read_expected(EVENT_ITEM
, "size") < 0)
4537 if (read_expected(EVENT_OP
, ":") < 0)
4539 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4541 *size
= atoi(token
);
4543 if (read_expected(EVENT_OP
, ";") < 0)
4545 type
= read_token(&token
);
4546 if (type
!= EVENT_NEWLINE
) {
4547 /* newer versions of the kernel have a "signed" type */
4548 if (type
!= EVENT_ITEM
)
4551 if (strcmp(token
, "signed") != 0)
4556 if (read_expected(EVENT_OP
, ":") < 0)
4559 if (read_expect_type(EVENT_ITEM
, &token
))
4563 if (read_expected(EVENT_OP
, ";") < 0)
4566 if (read_expect_type(EVENT_NEWLINE
, &token
))
4574 input_buf_ptr
= save_input_buf_ptr
;
4575 input_buf_siz
= save_input_buf_siz
;
4582 * pevent_parse_header_page - parse the data stored in the header page
4583 * @pevent: the handle to the pevent
4584 * @buf: the buffer storing the header page format string
4585 * @size: the size of @buf
4586 * @long_size: the long size to use if there is no header
4588 * This parses the header page format for information on the
4589 * ring buffer used. The @buf should be copied from
4591 * /sys/kernel/debug/tracing/events/header_page
4593 int pevent_parse_header_page(struct pevent
*pevent
, char *buf
, unsigned long size
,
4600 * Old kernels did not have header page info.
4601 * Sorry but we just use what we find here in user space.
4603 pevent
->header_page_ts_size
= sizeof(long long);
4604 pevent
->header_page_size_size
= long_size
;
4605 pevent
->header_page_data_offset
= sizeof(long long) + long_size
;
4606 pevent
->old_format
= 1;
4609 init_input_buf(buf
, size
);
4611 parse_header_field("timestamp", &pevent
->header_page_ts_offset
,
4612 &pevent
->header_page_ts_size
, 1);
4613 parse_header_field("commit", &pevent
->header_page_size_offset
,
4614 &pevent
->header_page_size_size
, 1);
4615 parse_header_field("overwrite", &pevent
->header_page_overwrite
,
4617 parse_header_field("data", &pevent
->header_page_data_offset
,
4618 &pevent
->header_page_data_size
, 1);
4623 static int event_matches(struct event_format
*event
,
4624 int id
, const char *sys_name
,
4625 const char *event_name
)
4627 if (id
>= 0 && id
!= event
->id
)
4630 if (event_name
&& (strcmp(event_name
, event
->name
) != 0))
4633 if (sys_name
&& (strcmp(sys_name
, event
->system
) != 0))
4639 static void free_handler(struct event_handler
*handle
)
4641 free((void *)handle
->sys_name
);
4642 free((void *)handle
->event_name
);
4646 static int find_event_handle(struct pevent
*pevent
, struct event_format
*event
)
4648 struct event_handler
*handle
, **next
;
4650 for (next
= &pevent
->handlers
; *next
;
4651 next
= &(*next
)->next
) {
4653 if (event_matches(event
, handle
->id
,
4655 handle
->event_name
))
4662 pr_stat("overriding event (%d) %s:%s with new print handler",
4663 event
->id
, event
->system
, event
->name
);
4665 event
->handler
= handle
->func
;
4666 event
->context
= handle
->context
;
4668 *next
= handle
->next
;
4669 free_handler(handle
);
4675 * pevent_parse_event - parse the event format
4676 * @pevent: the handle to the pevent
4677 * @buf: the buffer storing the event format string
4678 * @size: the size of @buf
4679 * @sys: the system the event belongs to
4681 * This parses the event format and creates an event structure
4682 * to quickly parse raw data for a given event.
4684 * These files currently come from:
4686 * /sys/kernel/debug/tracing/events/.../.../format
4688 int pevent_parse_event(struct pevent
*pevent
,
4689 const char *buf
, unsigned long size
,
4692 struct event_format
*event
;
4695 init_input_buf(buf
, size
);
4697 event
= alloc_event();
4701 event
->name
= event_read_name();
4708 if (strcmp(sys
, "ftrace") == 0) {
4710 event
->flags
|= EVENT_FL_ISFTRACE
;
4712 if (strcmp(event
->name
, "bprint") == 0)
4713 event
->flags
|= EVENT_FL_ISBPRINT
;
4716 event
->id
= event_read_id();
4718 die("failed to read event id");
4720 event
->system
= strdup(sys
);
4722 die("failed to allocate system");
4724 /* Add pevent to event so that it can be referenced */
4725 event
->pevent
= pevent
;
4727 ret
= event_read_format(event
);
4729 do_warning("failed to read event format for %s", event
->name
);
4734 * If the event has an override, don't print warnings if the event
4735 * print format fails to parse.
4737 if (find_event_handle(pevent
, event
))
4740 ret
= event_read_print(event
);
4742 do_warning("failed to read event print fmt for %s",
4749 add_event(pevent
, event
);
4751 if (!ret
&& (event
->flags
& EVENT_FL_ISFTRACE
)) {
4752 struct format_field
*field
;
4753 struct print_arg
*arg
, **list
;
4755 /* old ftrace had no args */
4757 list
= &event
->print_fmt
.args
;
4758 for (field
= event
->format
.fields
; field
; field
= field
->next
) {
4762 arg
->type
= PRINT_FIELD
;
4763 arg
->field
.name
= strdup(field
->name
);
4764 if (!arg
->field
.name
) {
4765 do_warning("failed to allocate field name");
4766 event
->flags
|= EVENT_FL_FAILED
;
4769 arg
->field
.field
= field
;
4774 #define PRINT_ARGS 0
4775 if (PRINT_ARGS
&& event
->print_fmt
.args
)
4776 print_args(event
->print_fmt
.args
);
4781 event
->flags
|= EVENT_FL_FAILED
;
4782 /* still add it even if it failed */
4783 add_event(pevent
, event
);
4787 int get_field_val(struct trace_seq
*s
, struct format_field
*field
,
4788 const char *name
, struct pevent_record
*record
,
4789 unsigned long long *val
, int err
)
4793 trace_seq_printf(s
, "<CANT FIND FIELD %s>", name
);
4797 if (pevent_read_number_field(field
, record
->data
, val
)) {
4799 trace_seq_printf(s
, " %s=INVALID", name
);
4807 * pevent_get_field_raw - return the raw pointer into the data field
4808 * @s: The seq to print to on error
4809 * @event: the event that the field is for
4810 * @name: The name of the field
4811 * @record: The record with the field name.
4812 * @len: place to store the field length.
4813 * @err: print default error if failed.
4815 * Returns a pointer into record->data of the field and places
4816 * the length of the field in @len.
4818 * On failure, it returns NULL.
4820 void *pevent_get_field_raw(struct trace_seq
*s
, struct event_format
*event
,
4821 const char *name
, struct pevent_record
*record
,
4824 struct format_field
*field
;
4825 void *data
= record
->data
;
4832 field
= pevent_find_field(event
, name
);
4836 trace_seq_printf(s
, "<CANT FIND FIELD %s>", name
);
4840 /* Allow @len to be NULL */
4844 offset
= field
->offset
;
4845 if (field
->flags
& FIELD_IS_DYNAMIC
) {
4846 offset
= pevent_read_number(event
->pevent
,
4847 data
+ offset
, field
->size
);
4848 *len
= offset
>> 16;
4853 return data
+ offset
;
4857 * pevent_get_field_val - find a field and return its value
4858 * @s: The seq to print to on error
4859 * @event: the event that the field is for
4860 * @name: The name of the field
4861 * @record: The record with the field name.
4862 * @val: place to store the value of the field.
4863 * @err: print default error if failed.
4865 * Returns 0 on success -1 on field not found.
4867 int pevent_get_field_val(struct trace_seq
*s
, struct event_format
*event
,
4868 const char *name
, struct pevent_record
*record
,
4869 unsigned long long *val
, int err
)
4871 struct format_field
*field
;
4876 field
= pevent_find_field(event
, name
);
4878 return get_field_val(s
, field
, name
, record
, val
, err
);
4882 * pevent_get_common_field_val - find a common field and return its value
4883 * @s: The seq to print to on error
4884 * @event: the event that the field is for
4885 * @name: The name of the field
4886 * @record: The record with the field name.
4887 * @val: place to store the value of the field.
4888 * @err: print default error if failed.
4890 * Returns 0 on success -1 on field not found.
4892 int pevent_get_common_field_val(struct trace_seq
*s
, struct event_format
*event
,
4893 const char *name
, struct pevent_record
*record
,
4894 unsigned long long *val
, int err
)
4896 struct format_field
*field
;
4901 field
= pevent_find_common_field(event
, name
);
4903 return get_field_val(s
, field
, name
, record
, val
, err
);
4907 * pevent_get_any_field_val - find a any field and return its value
4908 * @s: The seq to print to on error
4909 * @event: the event that the field is for
4910 * @name: The name of the field
4911 * @record: The record with the field name.
4912 * @val: place to store the value of the field.
4913 * @err: print default error if failed.
4915 * Returns 0 on success -1 on field not found.
4917 int pevent_get_any_field_val(struct trace_seq
*s
, struct event_format
*event
,
4918 const char *name
, struct pevent_record
*record
,
4919 unsigned long long *val
, int err
)
4921 struct format_field
*field
;
4926 field
= pevent_find_any_field(event
, name
);
4928 return get_field_val(s
, field
, name
, record
, val
, err
);
4932 * pevent_print_num_field - print a field and a format
4933 * @s: The seq to print to
4934 * @fmt: The printf format to print the field with.
4935 * @event: the event that the field is for
4936 * @name: The name of the field
4937 * @record: The record with the field name.
4938 * @err: print default error if failed.
4940 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
4942 int pevent_print_num_field(struct trace_seq
*s
, const char *fmt
,
4943 struct event_format
*event
, const char *name
,
4944 struct pevent_record
*record
, int err
)
4946 struct format_field
*field
= pevent_find_field(event
, name
);
4947 unsigned long long val
;
4952 if (pevent_read_number_field(field
, record
->data
, &val
))
4955 return trace_seq_printf(s
, fmt
, val
);
4959 trace_seq_printf(s
, "CAN'T FIND FIELD \"%s\"", name
);
4963 static void free_func_handle(struct pevent_function_handler
*func
)
4965 struct pevent_func_params
*params
;
4969 while (func
->params
) {
4970 params
= func
->params
;
4971 func
->params
= params
->next
;
4979 * pevent_register_print_function - register a helper function
4980 * @pevent: the handle to the pevent
4981 * @func: the function to process the helper function
4982 * @ret_type: the return type of the helper function
4983 * @name: the name of the helper function
4984 * @parameters: A list of enum pevent_func_arg_type
4986 * Some events may have helper functions in the print format arguments.
4987 * This allows a plugin to dynamically create a way to process one
4988 * of these functions.
4990 * The @parameters is a variable list of pevent_func_arg_type enums that
4991 * must end with PEVENT_FUNC_ARG_VOID.
4993 int pevent_register_print_function(struct pevent
*pevent
,
4994 pevent_func_handler func
,
4995 enum pevent_func_arg_type ret_type
,
4998 struct pevent_function_handler
*func_handle
;
4999 struct pevent_func_params
**next_param
;
5000 struct pevent_func_params
*param
;
5001 enum pevent_func_arg_type type
;
5004 func_handle
= find_func_handler(pevent
, name
);
5007 * This is most like caused by the users own
5008 * plugins updating the function. This overrides the
5011 pr_stat("override of function helper '%s'", name
);
5012 remove_func_handler(pevent
, name
);
5015 func_handle
= malloc_or_die(sizeof(*func_handle
));
5016 memset(func_handle
, 0, sizeof(*func_handle
));
5018 func_handle
->ret_type
= ret_type
;
5019 func_handle
->name
= strdup(name
);
5020 func_handle
->func
= func
;
5021 if (!func_handle
->name
)
5022 die("Failed to allocate function name");
5024 next_param
= &(func_handle
->params
);
5027 type
= va_arg(ap
, enum pevent_func_arg_type
);
5028 if (type
== PEVENT_FUNC_ARG_VOID
)
5031 if (type
< 0 || type
>= PEVENT_FUNC_ARG_MAX_TYPES
) {
5032 warning("Invalid argument type %d", type
);
5036 param
= malloc_or_die(sizeof(*param
));
5040 *next_param
= param
;
5041 next_param
= &(param
->next
);
5043 func_handle
->nr_args
++;
5047 func_handle
->next
= pevent
->func_handlers
;
5048 pevent
->func_handlers
= func_handle
;
5053 free_func_handle(func_handle
);
5058 * pevent_register_event_handler - register a way to parse an event
5059 * @pevent: the handle to the pevent
5060 * @id: the id of the event to register
5061 * @sys_name: the system name the event belongs to
5062 * @event_name: the name of the event
5063 * @func: the function to call to parse the event information
5064 * @context: the data to be passed to @func
5066 * This function allows a developer to override the parsing of
5067 * a given event. If for some reason the default print format
5068 * is not sufficient, this function will register a function
5069 * for an event to be used to parse the data instead.
5071 * If @id is >= 0, then it is used to find the event.
5072 * else @sys_name and @event_name are used.
5074 int pevent_register_event_handler(struct pevent
*pevent
,
5075 int id
, char *sys_name
, char *event_name
,
5076 pevent_event_handler_func func
,
5079 struct event_format
*event
;
5080 struct event_handler
*handle
;
5084 event
= pevent_find_event(pevent
, id
);
5087 if (event_name
&& (strcmp(event_name
, event
->name
) != 0))
5089 if (sys_name
&& (strcmp(sys_name
, event
->system
) != 0))
5092 event
= pevent_find_event_by_name(pevent
, sys_name
, event_name
);
5097 pr_stat("overriding event (%d) %s:%s with new print handler",
5098 event
->id
, event
->system
, event
->name
);
5100 event
->handler
= func
;
5101 event
->context
= context
;
5105 /* Save for later use. */
5106 handle
= malloc_or_die(sizeof(*handle
));
5107 memset(handle
, 0, sizeof(*handle
));
5110 handle
->event_name
= strdup(event_name
);
5112 handle
->sys_name
= strdup(sys_name
);
5114 if ((event_name
&& !handle
->event_name
) ||
5115 (sys_name
&& !handle
->sys_name
)) {
5116 die("Failed to allocate event/sys name");
5119 handle
->func
= func
;
5120 handle
->next
= pevent
->handlers
;
5121 pevent
->handlers
= handle
;
5122 handle
->context
= context
;
5128 * pevent_alloc - create a pevent handle
5130 struct pevent
*pevent_alloc(void)
5132 struct pevent
*pevent
;
5134 pevent
= malloc(sizeof(*pevent
));
5137 memset(pevent
, 0, sizeof(*pevent
));
5138 pevent
->ref_count
= 1;
5143 void pevent_ref(struct pevent
*pevent
)
5145 pevent
->ref_count
++;
5148 static void free_format_fields(struct format_field
*field
)
5150 struct format_field
*next
;
5161 static void free_formats(struct format
*format
)
5163 free_format_fields(format
->common_fields
);
5164 free_format_fields(format
->fields
);
5167 static void free_event(struct event_format
*event
)
5170 free(event
->system
);
5172 free_formats(&event
->format
);
5174 free(event
->print_fmt
.format
);
5175 free_args(event
->print_fmt
.args
);
5181 * pevent_free - free a pevent handle
5182 * @pevent: the pevent handle to free
5184 void pevent_free(struct pevent
*pevent
)
5186 struct cmdline_list
*cmdlist
, *cmdnext
;
5187 struct func_list
*funclist
, *funcnext
;
5188 struct printk_list
*printklist
, *printknext
;
5189 struct pevent_function_handler
*func_handler
;
5190 struct event_handler
*handle
;
5196 cmdlist
= pevent
->cmdlist
;
5197 funclist
= pevent
->funclist
;
5198 printklist
= pevent
->printklist
;
5200 pevent
->ref_count
--;
5201 if (pevent
->ref_count
)
5204 if (pevent
->cmdlines
) {
5205 for (i
= 0; i
< pevent
->cmdline_count
; i
++)
5206 free(pevent
->cmdlines
[i
].comm
);
5207 free(pevent
->cmdlines
);
5211 cmdnext
= cmdlist
->next
;
5212 free(cmdlist
->comm
);
5217 if (pevent
->func_map
) {
5218 for (i
= 0; i
< pevent
->func_count
; i
++) {
5219 free(pevent
->func_map
[i
].func
);
5220 free(pevent
->func_map
[i
].mod
);
5222 free(pevent
->func_map
);
5226 funcnext
= funclist
->next
;
5227 free(funclist
->func
);
5228 free(funclist
->mod
);
5230 funclist
= funcnext
;
5233 while (pevent
->func_handlers
) {
5234 func_handler
= pevent
->func_handlers
;
5235 pevent
->func_handlers
= func_handler
->next
;
5236 free_func_handle(func_handler
);
5239 if (pevent
->printk_map
) {
5240 for (i
= 0; i
< pevent
->printk_count
; i
++)
5241 free(pevent
->printk_map
[i
].printk
);
5242 free(pevent
->printk_map
);
5245 while (printklist
) {
5246 printknext
= printklist
->next
;
5247 free(printklist
->printk
);
5249 printklist
= printknext
;
5252 for (i
= 0; i
< pevent
->nr_events
; i
++)
5253 free_event(pevent
->events
[i
]);
5255 while (pevent
->handlers
) {
5256 handle
= pevent
->handlers
;
5257 pevent
->handlers
= handle
->next
;
5258 free_handler(handle
);
5261 free(pevent
->events
);
5262 free(pevent
->sort_events
);
5267 void pevent_unref(struct pevent
*pevent
)
5269 pevent_free(pevent
);