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.
36 #include "event-parse.h"
37 #include "event-utils.h"
39 static const char *input_buf
;
40 static unsigned long long input_buf_ptr
;
41 static unsigned long long input_buf_siz
;
43 static int is_flag_field
;
44 static int is_symbolic_field
;
46 static int show_warning
= 1;
48 #define do_warning(fmt, ...) \
51 warning(fmt, ##__VA_ARGS__); \
54 static void init_input_buf(const char *buf
, unsigned long long size
)
61 const char *pevent_get_input_buf(void)
66 unsigned long long pevent_get_input_buf_ptr(void)
71 struct event_handler
{
72 struct event_handler
*next
;
75 const char *event_name
;
76 pevent_event_handler_func func
;
80 struct pevent_func_params
{
81 struct pevent_func_params
*next
;
82 enum pevent_func_arg_type type
;
85 struct pevent_function_handler
{
86 struct pevent_function_handler
*next
;
87 enum pevent_func_arg_type ret_type
;
89 pevent_func_handler func
;
90 struct pevent_func_params
*params
;
94 static unsigned long long
95 process_defined_func(struct trace_seq
*s
, void *data
, int size
,
96 struct event_format
*event
, struct print_arg
*arg
);
98 static void free_func_handle(struct pevent_function_handler
*func
);
101 * pevent_buffer_init - init buffer for parsing
102 * @buf: buffer to parse
103 * @size: the size of the buffer
105 * For use with pevent_read_token(), this initializes the internal
106 * buffer that pevent_read_token() will parse.
108 void pevent_buffer_init(const char *buf
, unsigned long long size
)
110 init_input_buf(buf
, size
);
113 void breakpoint(void)
119 struct print_arg
*alloc_arg(void)
121 return calloc(1, sizeof(struct print_arg
));
129 static int cmdline_cmp(const void *a
, const void *b
)
131 const struct cmdline
*ca
= a
;
132 const struct cmdline
*cb
= b
;
134 if (ca
->pid
< cb
->pid
)
136 if (ca
->pid
> cb
->pid
)
142 struct cmdline_list
{
143 struct cmdline_list
*next
;
148 static int cmdline_init(struct pevent
*pevent
)
150 struct cmdline_list
*cmdlist
= pevent
->cmdlist
;
151 struct cmdline_list
*item
;
152 struct cmdline
*cmdlines
;
155 cmdlines
= malloc(sizeof(*cmdlines
) * pevent
->cmdline_count
);
161 cmdlines
[i
].pid
= cmdlist
->pid
;
162 cmdlines
[i
].comm
= cmdlist
->comm
;
165 cmdlist
= cmdlist
->next
;
169 qsort(cmdlines
, pevent
->cmdline_count
, sizeof(*cmdlines
), cmdline_cmp
);
171 pevent
->cmdlines
= cmdlines
;
172 pevent
->cmdlist
= NULL
;
177 static char *find_cmdline(struct pevent
*pevent
, int pid
)
179 const struct cmdline
*comm
;
185 if (!pevent
->cmdlines
&& cmdline_init(pevent
))
186 return "<not enough memory for cmdlines!>";
190 comm
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
191 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
199 * pevent_pid_is_registered - return if a pid has a cmdline registered
200 * @pevent: handle for the pevent
201 * @pid: The pid to check if it has a cmdline registered with.
203 * Returns 1 if the pid has a cmdline mapped to it
206 int pevent_pid_is_registered(struct pevent
*pevent
, int pid
)
208 const struct cmdline
*comm
;
214 if (!pevent
->cmdlines
&& cmdline_init(pevent
))
219 comm
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
220 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
228 * If the command lines have been converted to an array, then
229 * we must add this pid. This is much slower than when cmdlines
230 * are added before the array is initialized.
232 static int add_new_comm(struct pevent
*pevent
, const char *comm
, int pid
)
234 struct cmdline
*cmdlines
= pevent
->cmdlines
;
235 const struct cmdline
*cmdline
;
241 /* avoid duplicates */
244 cmdline
= bsearch(&key
, pevent
->cmdlines
, pevent
->cmdline_count
,
245 sizeof(*pevent
->cmdlines
), cmdline_cmp
);
251 cmdlines
= realloc(cmdlines
, sizeof(*cmdlines
) * (pevent
->cmdline_count
+ 1));
257 cmdlines
[pevent
->cmdline_count
].comm
= strdup(comm
);
258 if (!cmdlines
[pevent
->cmdline_count
].comm
) {
264 cmdlines
[pevent
->cmdline_count
].pid
= pid
;
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(sizeof(*item
));
295 item
->comm
= strdup(comm
);
301 item
->next
= pevent
->cmdlist
;
303 pevent
->cmdlist
= item
;
304 pevent
->cmdline_count
++;
310 unsigned long long addr
;
316 struct func_list
*next
;
317 unsigned long long addr
;
322 static int func_cmp(const void *a
, const void *b
)
324 const struct func_map
*fa
= a
;
325 const struct func_map
*fb
= b
;
327 if (fa
->addr
< fb
->addr
)
329 if (fa
->addr
> fb
->addr
)
336 * We are searching for a record in between, not an exact
339 static int func_bcmp(const void *a
, const void *b
)
341 const struct func_map
*fa
= a
;
342 const struct func_map
*fb
= b
;
344 if ((fa
->addr
== fb
->addr
) ||
346 (fa
->addr
> fb
->addr
&&
347 fa
->addr
< (fb
+1)->addr
))
350 if (fa
->addr
< fb
->addr
)
356 static int func_map_init(struct pevent
*pevent
)
358 struct func_list
*funclist
;
359 struct func_list
*item
;
360 struct func_map
*func_map
;
363 func_map
= malloc(sizeof(*func_map
) * (pevent
->func_count
+ 1));
367 funclist
= pevent
->funclist
;
371 func_map
[i
].func
= funclist
->func
;
372 func_map
[i
].addr
= funclist
->addr
;
373 func_map
[i
].mod
= funclist
->mod
;
376 funclist
= funclist
->next
;
380 qsort(func_map
, pevent
->func_count
, sizeof(*func_map
), func_cmp
);
383 * Add a special record at the end.
385 func_map
[pevent
->func_count
].func
= NULL
;
386 func_map
[pevent
->func_count
].addr
= 0;
387 func_map
[pevent
->func_count
].mod
= NULL
;
389 pevent
->func_map
= func_map
;
390 pevent
->funclist
= NULL
;
395 static struct func_map
*
396 find_func(struct pevent
*pevent
, unsigned long long addr
)
398 struct func_map
*func
;
401 if (!pevent
->func_map
)
402 func_map_init(pevent
);
406 func
= bsearch(&key
, pevent
->func_map
, pevent
->func_count
,
407 sizeof(*pevent
->func_map
), func_bcmp
);
413 * pevent_find_function - find a function by a given address
414 * @pevent: handle for the pevent
415 * @addr: the address to find the function with
417 * Returns a pointer to the function stored that has the given
418 * address. Note, the address does not have to be exact, it
419 * will select the function that would contain the address.
421 const char *pevent_find_function(struct pevent
*pevent
, unsigned long long addr
)
423 struct func_map
*map
;
425 map
= find_func(pevent
, addr
);
433 * pevent_find_function_address - find a function address by a given address
434 * @pevent: handle for the pevent
435 * @addr: the address to find the function with
437 * Returns the address the function starts at. This can be used in
438 * conjunction with pevent_find_function to print both the function
439 * name and the function offset.
442 pevent_find_function_address(struct pevent
*pevent
, unsigned long long addr
)
444 struct func_map
*map
;
446 map
= find_func(pevent
, addr
);
454 * pevent_register_function - register a function with a given address
455 * @pevent: handle for the pevent
456 * @function: the function name to register
457 * @addr: the address the function starts at
458 * @mod: the kernel module the function may be in (NULL for none)
460 * This registers a function name with an address and module.
461 * The @func passed in is duplicated.
463 int pevent_register_function(struct pevent
*pevent
, char *func
,
464 unsigned long long addr
, char *mod
)
466 struct func_list
*item
= malloc(sizeof(*item
));
471 item
->next
= pevent
->funclist
;
472 item
->func
= strdup(func
);
477 item
->mod
= strdup(mod
);
484 pevent
->funclist
= item
;
485 pevent
->func_count
++;
499 * pevent_print_funcs - print out the stored functions
500 * @pevent: handle for the pevent
502 * This prints out the stored functions.
504 void pevent_print_funcs(struct pevent
*pevent
)
508 if (!pevent
->func_map
)
509 func_map_init(pevent
);
511 for (i
= 0; i
< (int)pevent
->func_count
; i
++) {
513 pevent
->func_map
[i
].addr
,
514 pevent
->func_map
[i
].func
);
515 if (pevent
->func_map
[i
].mod
)
516 printf(" [%s]\n", pevent
->func_map
[i
].mod
);
523 unsigned long long addr
;
528 struct printk_list
*next
;
529 unsigned long long addr
;
533 static int printk_cmp(const void *a
, const void *b
)
535 const struct printk_map
*pa
= a
;
536 const struct printk_map
*pb
= b
;
538 if (pa
->addr
< pb
->addr
)
540 if (pa
->addr
> pb
->addr
)
546 static int printk_map_init(struct pevent
*pevent
)
548 struct printk_list
*printklist
;
549 struct printk_list
*item
;
550 struct printk_map
*printk_map
;
553 printk_map
= malloc(sizeof(*printk_map
) * (pevent
->printk_count
+ 1));
557 printklist
= pevent
->printklist
;
561 printk_map
[i
].printk
= printklist
->printk
;
562 printk_map
[i
].addr
= printklist
->addr
;
565 printklist
= printklist
->next
;
569 qsort(printk_map
, pevent
->printk_count
, sizeof(*printk_map
), printk_cmp
);
571 pevent
->printk_map
= printk_map
;
572 pevent
->printklist
= NULL
;
577 static struct printk_map
*
578 find_printk(struct pevent
*pevent
, unsigned long long addr
)
580 struct printk_map
*printk
;
581 struct printk_map key
;
583 if (!pevent
->printk_map
&& printk_map_init(pevent
))
588 printk
= bsearch(&key
, pevent
->printk_map
, pevent
->printk_count
,
589 sizeof(*pevent
->printk_map
), printk_cmp
);
595 * pevent_register_print_string - register a string by its address
596 * @pevent: handle for the pevent
597 * @fmt: the string format to register
598 * @addr: the address the string was located at
600 * This registers a string by the address it was stored in the kernel.
601 * The @fmt passed in is duplicated.
603 int pevent_register_print_string(struct pevent
*pevent
, char *fmt
,
604 unsigned long long addr
)
606 struct printk_list
*item
= malloc(sizeof(*item
));
611 item
->next
= pevent
->printklist
;
614 item
->printk
= strdup(fmt
);
618 pevent
->printklist
= item
;
619 pevent
->printk_count
++;
630 * pevent_print_printk - print out the stored strings
631 * @pevent: handle for the pevent
633 * This prints the string formats that were stored.
635 void pevent_print_printk(struct pevent
*pevent
)
639 if (!pevent
->printk_map
)
640 printk_map_init(pevent
);
642 for (i
= 0; i
< (int)pevent
->printk_count
; i
++) {
643 printf("%016llx %s\n",
644 pevent
->printk_map
[i
].addr
,
645 pevent
->printk_map
[i
].printk
);
649 static struct event_format
*alloc_event(void)
651 return calloc(1, sizeof(struct event_format
));
654 static int add_event(struct pevent
*pevent
, struct event_format
*event
)
657 struct event_format
**events
= realloc(pevent
->events
, sizeof(event
) *
658 (pevent
->nr_events
+ 1));
662 pevent
->events
= events
;
664 for (i
= 0; i
< pevent
->nr_events
; i
++) {
665 if (pevent
->events
[i
]->id
> event
->id
)
668 if (i
< pevent
->nr_events
)
669 memmove(&pevent
->events
[i
+ 1],
671 sizeof(event
) * (pevent
->nr_events
- i
));
673 pevent
->events
[i
] = event
;
676 event
->pevent
= pevent
;
681 static int event_item_type(enum event_type type
)
684 case EVENT_ITEM
... EVENT_SQUOTE
:
686 case EVENT_ERROR
... EVENT_DELIM
:
692 static void free_flag_sym(struct print_flag_sym
*fsym
)
694 struct print_flag_sym
*next
;
705 static void free_arg(struct print_arg
*arg
)
707 struct print_arg
*farg
;
714 free(arg
->atom
.atom
);
717 free(arg
->field
.name
);
720 free_arg(arg
->flags
.field
);
721 free(arg
->flags
.delim
);
722 free_flag_sym(arg
->flags
.flags
);
725 free_arg(arg
->symbol
.field
);
726 free_flag_sym(arg
->symbol
.symbols
);
729 free_arg(arg
->hex
.field
);
730 free_arg(arg
->hex
.size
);
733 free(arg
->typecast
.type
);
734 free_arg(arg
->typecast
.item
);
738 free(arg
->string
.string
);
740 case PRINT_DYNAMIC_ARRAY
:
741 free(arg
->dynarray
.index
);
745 free_arg(arg
->op
.left
);
746 free_arg(arg
->op
.right
);
749 while (arg
->func
.args
) {
750 farg
= arg
->func
.args
;
751 arg
->func
.args
= farg
->next
;
764 static enum event_type
get_type(int ch
)
767 return EVENT_NEWLINE
;
770 if (isalnum(ch
) || ch
== '_')
778 if (ch
== '(' || ch
== ')' || ch
== ',')
784 static int __read_char(void)
786 if (input_buf_ptr
>= input_buf_siz
)
789 return input_buf
[input_buf_ptr
++];
792 static int __peek_char(void)
794 if (input_buf_ptr
>= input_buf_siz
)
797 return input_buf
[input_buf_ptr
];
801 * pevent_peek_char - peek at the next character that will be read
803 * Returns the next character read, or -1 if end of buffer.
805 int pevent_peek_char(void)
807 return __peek_char();
810 static int extend_token(char **tok
, char *buf
, int size
)
812 char *newtok
= realloc(*tok
, size
);
829 static enum event_type
force_token(const char *str
, char **tok
);
831 static enum event_type
__read_token(char **tok
)
834 int ch
, last_ch
, quote_ch
, next_ch
;
837 enum event_type type
;
847 if (type
== EVENT_NONE
)
855 if (asprintf(tok
, "%c", ch
) < 0)
863 next_ch
= __peek_char();
864 if (next_ch
== '>') {
865 buf
[i
++] = __read_char();
878 buf
[i
++] = __read_char();
890 default: /* what should we do instead? */
900 buf
[i
++] = __read_char();
905 /* don't keep quotes */
911 if (i
== (BUFSIZ
- 1)) {
915 if (extend_token(tok
, buf
, tok_size
) < 0)
922 /* the '\' '\' will cancel itself */
923 if (ch
== '\\' && last_ch
== '\\')
925 } while (ch
!= quote_ch
|| last_ch
== '\\');
926 /* remove the last quote */
930 * For strings (double quotes) check the next token.
931 * If it is another string, concatinate the two.
933 if (type
== EVENT_DQUOTE
) {
934 unsigned long long save_input_buf_ptr
= input_buf_ptr
;
938 } while (isspace(ch
));
941 input_buf_ptr
= save_input_buf_ptr
;
946 case EVENT_ERROR
... EVENT_SPACE
:
952 while (get_type(__peek_char()) == type
) {
953 if (i
== (BUFSIZ
- 1)) {
957 if (extend_token(tok
, buf
, tok_size
) < 0)
967 if (extend_token(tok
, buf
, tok_size
+ i
+ 1) < 0)
970 if (type
== EVENT_ITEM
) {
972 * Older versions of the kernel has a bug that
973 * creates invalid symbols and will break the mac80211
974 * parsing. This is a work around to that bug.
976 * See Linux kernel commit:
977 * 811cb50baf63461ce0bdb234927046131fc7fa8b
979 if (strcmp(*tok
, "LOCAL_PR_FMT") == 0) {
982 return force_token("\"\%s\" ", tok
);
983 } else if (strcmp(*tok
, "STA_PR_FMT") == 0) {
986 return force_token("\" sta:%pM\" ", tok
);
987 } else if (strcmp(*tok
, "VIF_PR_FMT") == 0) {
990 return force_token("\" vif:%p(%d)\" ", tok
);
997 static enum event_type
force_token(const char *str
, char **tok
)
999 const char *save_input_buf
;
1000 unsigned long long save_input_buf_ptr
;
1001 unsigned long long save_input_buf_siz
;
1002 enum event_type type
;
1004 /* save off the current input pointers */
1005 save_input_buf
= input_buf
;
1006 save_input_buf_ptr
= input_buf_ptr
;
1007 save_input_buf_siz
= input_buf_siz
;
1009 init_input_buf(str
, strlen(str
));
1011 type
= __read_token(tok
);
1013 /* reset back to original token */
1014 input_buf
= save_input_buf
;
1015 input_buf_ptr
= save_input_buf_ptr
;
1016 input_buf_siz
= save_input_buf_siz
;
1021 static void free_token(char *tok
)
1027 static enum event_type
read_token(char **tok
)
1029 enum event_type type
;
1032 type
= __read_token(tok
);
1033 if (type
!= EVENT_SPACE
)
1045 * pevent_read_token - access to utilites to use the pevent parser
1046 * @tok: The token to return
1048 * This will parse tokens from the string given by
1049 * pevent_init_data().
1051 * Returns the token type.
1053 enum event_type
pevent_read_token(char **tok
)
1055 return read_token(tok
);
1059 * pevent_free_token - free a token returned by pevent_read_token
1060 * @token: the token to free
1062 void pevent_free_token(char *token
)
1068 static enum event_type
read_token_item(char **tok
)
1070 enum event_type type
;
1073 type
= __read_token(tok
);
1074 if (type
!= EVENT_SPACE
&& type
!= EVENT_NEWLINE
)
1085 static int test_type(enum event_type type
, enum event_type expect
)
1087 if (type
!= expect
) {
1088 do_warning("Error: expected type %d but read %d",
1095 static int test_type_token(enum event_type type
, const char *token
,
1096 enum event_type expect
, const char *expect_tok
)
1098 if (type
!= expect
) {
1099 do_warning("Error: expected type %d but read %d",
1104 if (strcmp(token
, expect_tok
) != 0) {
1105 do_warning("Error: expected '%s' but read '%s'",
1112 static int __read_expect_type(enum event_type expect
, char **tok
, int newline_ok
)
1114 enum event_type type
;
1117 type
= read_token(tok
);
1119 type
= read_token_item(tok
);
1120 return test_type(type
, expect
);
1123 static int read_expect_type(enum event_type expect
, char **tok
)
1125 return __read_expect_type(expect
, tok
, 1);
1128 static int __read_expected(enum event_type expect
, const char *str
,
1131 enum event_type type
;
1136 type
= read_token(&token
);
1138 type
= read_token_item(&token
);
1140 ret
= test_type_token(type
, token
, expect
, str
);
1147 static int read_expected(enum event_type expect
, const char *str
)
1149 return __read_expected(expect
, str
, 1);
1152 static int read_expected_item(enum event_type expect
, const char *str
)
1154 return __read_expected(expect
, str
, 0);
1157 static char *event_read_name(void)
1161 if (read_expected(EVENT_ITEM
, "name") < 0)
1164 if (read_expected(EVENT_OP
, ":") < 0)
1167 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1177 static int event_read_id(void)
1182 if (read_expected_item(EVENT_ITEM
, "ID") < 0)
1185 if (read_expected(EVENT_OP
, ":") < 0)
1188 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1191 id
= strtoul(token
, NULL
, 0);
1200 static int field_is_string(struct format_field
*field
)
1202 if ((field
->flags
& FIELD_IS_ARRAY
) &&
1203 (strstr(field
->type
, "char") || strstr(field
->type
, "u8") ||
1204 strstr(field
->type
, "s8")))
1210 static int field_is_dynamic(struct format_field
*field
)
1212 if (strncmp(field
->type
, "__data_loc", 10) == 0)
1218 static int field_is_long(struct format_field
*field
)
1220 /* includes long long */
1221 if (strstr(field
->type
, "long"))
1227 static int event_read_fields(struct event_format
*event
, struct format_field
**fields
)
1229 struct format_field
*field
= NULL
;
1230 enum event_type type
;
1236 type
= read_token(&token
);
1237 if (type
== EVENT_NEWLINE
) {
1244 if (test_type_token(type
, token
, EVENT_ITEM
, "field"))
1248 type
= read_token(&token
);
1250 * The ftrace fields may still use the "special" name.
1253 if (event
->flags
& EVENT_FL_ISFTRACE
&&
1254 type
== EVENT_ITEM
&& strcmp(token
, "special") == 0) {
1256 type
= read_token(&token
);
1259 if (test_type_token(type
, token
, EVENT_OP
, ":") < 0)
1263 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1268 field
= calloc(1, sizeof(*field
));
1272 field
->event
= event
;
1274 /* read the rest of the type */
1276 type
= read_token(&token
);
1277 if (type
== EVENT_ITEM
||
1278 (type
== EVENT_OP
&& strcmp(token
, "*") == 0) ||
1280 * Some of the ftrace fields are broken and have
1281 * an illegal "." in them.
1283 (event
->flags
& EVENT_FL_ISFTRACE
&&
1284 type
== EVENT_OP
&& strcmp(token
, ".") == 0)) {
1286 if (strcmp(token
, "*") == 0)
1287 field
->flags
|= FIELD_IS_POINTER
;
1291 new_type
= realloc(field
->type
,
1292 strlen(field
->type
) +
1293 strlen(last_token
) + 2);
1298 field
->type
= new_type
;
1299 strcat(field
->type
, " ");
1300 strcat(field
->type
, last_token
);
1303 field
->type
= last_token
;
1312 do_warning("%s: no type found", __func__
);
1315 field
->name
= last_token
;
1317 if (test_type(type
, EVENT_OP
))
1320 if (strcmp(token
, "[") == 0) {
1321 enum event_type last_type
= type
;
1322 char *brackets
= token
;
1326 field
->flags
|= FIELD_IS_ARRAY
;
1328 type
= read_token(&token
);
1330 if (type
== EVENT_ITEM
)
1331 field
->arraylen
= strtoul(token
, NULL
, 0);
1333 field
->arraylen
= 0;
1335 while (strcmp(token
, "]") != 0) {
1336 if (last_type
== EVENT_ITEM
&&
1343 new_brackets
= realloc(brackets
,
1345 strlen(token
) + len
);
1346 if (!new_brackets
) {
1350 brackets
= new_brackets
;
1352 strcat(brackets
, " ");
1353 strcat(brackets
, token
);
1354 /* We only care about the last token */
1355 field
->arraylen
= strtoul(token
, NULL
, 0);
1357 type
= read_token(&token
);
1358 if (type
== EVENT_NONE
) {
1359 do_warning("failed to find token");
1366 new_brackets
= realloc(brackets
, strlen(brackets
) + 2);
1367 if (!new_brackets
) {
1371 brackets
= new_brackets
;
1372 strcat(brackets
, "]");
1374 /* add brackets to type */
1376 type
= read_token(&token
);
1378 * If the next token is not an OP, then it is of
1379 * the format: type [] item;
1381 if (type
== EVENT_ITEM
) {
1383 new_type
= realloc(field
->type
,
1384 strlen(field
->type
) +
1385 strlen(field
->name
) +
1386 strlen(brackets
) + 2);
1391 field
->type
= new_type
;
1392 strcat(field
->type
, " ");
1393 strcat(field
->type
, field
->name
);
1394 free_token(field
->name
);
1395 strcat(field
->type
, brackets
);
1396 field
->name
= token
;
1397 type
= read_token(&token
);
1400 new_type
= realloc(field
->type
,
1401 strlen(field
->type
) +
1402 strlen(brackets
) + 1);
1407 field
->type
= new_type
;
1408 strcat(field
->type
, brackets
);
1413 if (field_is_string(field
))
1414 field
->flags
|= FIELD_IS_STRING
;
1415 if (field_is_dynamic(field
))
1416 field
->flags
|= FIELD_IS_DYNAMIC
;
1417 if (field_is_long(field
))
1418 field
->flags
|= FIELD_IS_LONG
;
1420 if (test_type_token(type
, token
, EVENT_OP
, ";"))
1424 if (read_expected(EVENT_ITEM
, "offset") < 0)
1427 if (read_expected(EVENT_OP
, ":") < 0)
1430 if (read_expect_type(EVENT_ITEM
, &token
))
1432 field
->offset
= strtoul(token
, NULL
, 0);
1435 if (read_expected(EVENT_OP
, ";") < 0)
1438 if (read_expected(EVENT_ITEM
, "size") < 0)
1441 if (read_expected(EVENT_OP
, ":") < 0)
1444 if (read_expect_type(EVENT_ITEM
, &token
))
1446 field
->size
= strtoul(token
, NULL
, 0);
1449 if (read_expected(EVENT_OP
, ";") < 0)
1452 type
= read_token(&token
);
1453 if (type
!= EVENT_NEWLINE
) {
1454 /* newer versions of the kernel have a "signed" type */
1455 if (test_type_token(type
, token
, EVENT_ITEM
, "signed"))
1460 if (read_expected(EVENT_OP
, ":") < 0)
1463 if (read_expect_type(EVENT_ITEM
, &token
))
1466 /* add signed type */
1469 if (read_expected(EVENT_OP
, ";") < 0)
1472 if (read_expect_type(EVENT_NEWLINE
, &token
))
1478 if (field
->flags
& FIELD_IS_ARRAY
) {
1479 if (field
->arraylen
)
1480 field
->elementsize
= field
->size
/ field
->arraylen
;
1481 else if (field
->flags
& FIELD_IS_STRING
)
1482 field
->elementsize
= 1;
1484 field
->elementsize
= event
->pevent
->long_size
;
1486 field
->elementsize
= field
->size
;
1489 fields
= &field
->next
;
1506 static int event_read_format(struct event_format
*event
)
1511 if (read_expected_item(EVENT_ITEM
, "format") < 0)
1514 if (read_expected(EVENT_OP
, ":") < 0)
1517 if (read_expect_type(EVENT_NEWLINE
, &token
))
1521 ret
= event_read_fields(event
, &event
->format
.common_fields
);
1524 event
->format
.nr_common
= ret
;
1526 ret
= event_read_fields(event
, &event
->format
.fields
);
1529 event
->format
.nr_fields
= ret
;
1538 static enum event_type
1539 process_arg_token(struct event_format
*event
, struct print_arg
*arg
,
1540 char **tok
, enum event_type type
);
1542 static enum event_type
1543 process_arg(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
1545 enum event_type type
;
1548 type
= read_token(&token
);
1551 return process_arg_token(event
, arg
, tok
, type
);
1554 static enum event_type
1555 process_op(struct event_format
*event
, struct print_arg
*arg
, char **tok
);
1557 static enum event_type
1558 process_cond(struct event_format
*event
, struct print_arg
*top
, char **tok
)
1560 struct print_arg
*arg
, *left
, *right
;
1561 enum event_type type
;
1566 right
= alloc_arg();
1568 if (!arg
|| !left
|| !right
) {
1569 do_warning("%s: not enough memory!", __func__
);
1570 /* arg will be freed at out_free */
1576 arg
->type
= PRINT_OP
;
1577 arg
->op
.left
= left
;
1578 arg
->op
.right
= right
;
1581 type
= process_arg(event
, left
, &token
);
1584 /* Handle other operations in the arguments */
1585 if (type
== EVENT_OP
&& strcmp(token
, ":") != 0) {
1586 type
= process_op(event
, left
, &token
);
1590 if (test_type_token(type
, token
, EVENT_OP
, ":"))
1595 type
= process_arg(event
, right
, &token
);
1597 top
->op
.right
= arg
;
1603 /* Top may point to itself */
1604 top
->op
.right
= NULL
;
1610 static enum event_type
1611 process_array(struct event_format
*event
, struct print_arg
*top
, char **tok
)
1613 struct print_arg
*arg
;
1614 enum event_type type
;
1619 do_warning("%s: not enough memory!", __func__
);
1620 /* '*tok' is set to top->op.op. No need to free. */
1626 type
= process_arg(event
, arg
, &token
);
1627 if (test_type_token(type
, token
, EVENT_OP
, "]"))
1630 top
->op
.right
= arg
;
1633 type
= read_token_item(&token
);
1644 static int get_op_prio(char *op
)
1658 /* '>>' and '<<' are 8 */
1662 /* '==' and '!=' are 10 */
1672 do_warning("unknown op '%c'", op
[0]);
1676 if (strcmp(op
, "++") == 0 ||
1677 strcmp(op
, "--") == 0) {
1679 } else if (strcmp(op
, ">>") == 0 ||
1680 strcmp(op
, "<<") == 0) {
1682 } else if (strcmp(op
, ">=") == 0 ||
1683 strcmp(op
, "<=") == 0) {
1685 } else if (strcmp(op
, "==") == 0 ||
1686 strcmp(op
, "!=") == 0) {
1688 } else if (strcmp(op
, "&&") == 0) {
1690 } else if (strcmp(op
, "||") == 0) {
1693 do_warning("unknown op '%s'", op
);
1699 static int set_op_prio(struct print_arg
*arg
)
1702 /* single ops are the greatest */
1703 if (!arg
->op
.left
|| arg
->op
.left
->type
== PRINT_NULL
)
1706 arg
->op
.prio
= get_op_prio(arg
->op
.op
);
1708 return arg
->op
.prio
;
1711 /* Note, *tok does not get freed, but will most likely be saved */
1712 static enum event_type
1713 process_op(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
1715 struct print_arg
*left
, *right
= NULL
;
1716 enum event_type type
;
1719 /* the op is passed in via tok */
1722 if (arg
->type
== PRINT_OP
&& !arg
->op
.left
) {
1723 /* handle single op */
1725 do_warning("bad op token %s", token
);
1735 do_warning("bad op token %s", token
);
1740 /* make an empty left */
1745 left
->type
= PRINT_NULL
;
1746 arg
->op
.left
= left
;
1748 right
= alloc_arg();
1752 arg
->op
.right
= right
;
1754 /* do not free the token, it belongs to an op */
1756 type
= process_arg(event
, right
, tok
);
1758 } else if (strcmp(token
, "?") == 0) {
1764 /* copy the top arg to the left */
1767 arg
->type
= PRINT_OP
;
1769 arg
->op
.left
= left
;
1772 /* it will set arg->op.right */
1773 type
= process_cond(event
, arg
, tok
);
1775 } else if (strcmp(token
, ">>") == 0 ||
1776 strcmp(token
, "<<") == 0 ||
1777 strcmp(token
, "&") == 0 ||
1778 strcmp(token
, "|") == 0 ||
1779 strcmp(token
, "&&") == 0 ||
1780 strcmp(token
, "||") == 0 ||
1781 strcmp(token
, "-") == 0 ||
1782 strcmp(token
, "+") == 0 ||
1783 strcmp(token
, "*") == 0 ||
1784 strcmp(token
, "^") == 0 ||
1785 strcmp(token
, "/") == 0 ||
1786 strcmp(token
, "<") == 0 ||
1787 strcmp(token
, ">") == 0 ||
1788 strcmp(token
, "==") == 0 ||
1789 strcmp(token
, "!=") == 0) {
1795 /* copy the top arg to the left */
1798 arg
->type
= PRINT_OP
;
1800 arg
->op
.left
= left
;
1801 arg
->op
.right
= NULL
;
1803 if (set_op_prio(arg
) == -1) {
1804 event
->flags
|= EVENT_FL_FAILED
;
1805 /* arg->op.op (= token) will be freed at out_free */
1810 type
= read_token_item(&token
);
1813 /* could just be a type pointer */
1814 if ((strcmp(arg
->op
.op
, "*") == 0) &&
1815 type
== EVENT_DELIM
&& (strcmp(token
, ")") == 0)) {
1818 if (left
->type
!= PRINT_ATOM
) {
1819 do_warning("bad pointer type");
1822 new_atom
= realloc(left
->atom
.atom
,
1823 strlen(left
->atom
.atom
) + 3);
1827 left
->atom
.atom
= new_atom
;
1828 strcat(left
->atom
.atom
, " *");
1836 right
= alloc_arg();
1840 type
= process_arg_token(event
, right
, tok
, type
);
1841 arg
->op
.right
= right
;
1843 } else if (strcmp(token
, "[") == 0) {
1851 arg
->type
= PRINT_OP
;
1853 arg
->op
.left
= left
;
1857 /* it will set arg->op.right */
1858 type
= process_array(event
, arg
, tok
);
1861 do_warning("unknown op '%s'", token
);
1862 event
->flags
|= EVENT_FL_FAILED
;
1863 /* the arg is now the left side */
1867 if (type
== EVENT_OP
&& strcmp(*tok
, ":") != 0) {
1870 /* higher prios need to be closer to the root */
1871 prio
= get_op_prio(*tok
);
1873 if (prio
> arg
->op
.prio
)
1874 return process_op(event
, arg
, tok
);
1876 return process_op(event
, right
, tok
);
1882 do_warning("%s: not enough memory!", __func__
);
1889 static enum event_type
1890 process_entry(struct event_format
*event __maybe_unused
, struct print_arg
*arg
,
1893 enum event_type type
;
1897 if (read_expected(EVENT_OP
, "->") < 0)
1900 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
1904 arg
->type
= PRINT_FIELD
;
1905 arg
->field
.name
= field
;
1907 if (is_flag_field
) {
1908 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
1909 arg
->field
.field
->flags
|= FIELD_IS_FLAG
;
1911 } else if (is_symbolic_field
) {
1912 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
1913 arg
->field
.field
->flags
|= FIELD_IS_SYMBOLIC
;
1914 is_symbolic_field
= 0;
1917 type
= read_token(&token
);
1929 static char *arg_eval (struct print_arg
*arg
);
1931 static unsigned long long
1932 eval_type_str(unsigned long long val
, const char *type
, int pointer
)
1942 if (type
[len
-1] != '*') {
1943 do_warning("pointer expected with non pointer type");
1949 do_warning("%s: not enough memory!", __func__
);
1952 memcpy(ref
, type
, len
);
1954 /* chop off the " *" */
1957 val
= eval_type_str(val
, ref
, 0);
1962 /* check if this is a pointer */
1963 if (type
[len
- 1] == '*')
1966 /* Try to figure out the arg size*/
1967 if (strncmp(type
, "struct", 6) == 0)
1971 if (strcmp(type
, "u8") == 0)
1974 if (strcmp(type
, "u16") == 0)
1975 return val
& 0xffff;
1977 if (strcmp(type
, "u32") == 0)
1978 return val
& 0xffffffff;
1980 if (strcmp(type
, "u64") == 0 ||
1981 strcmp(type
, "s64"))
1984 if (strcmp(type
, "s8") == 0)
1985 return (unsigned long long)(char)val
& 0xff;
1987 if (strcmp(type
, "s16") == 0)
1988 return (unsigned long long)(short)val
& 0xffff;
1990 if (strcmp(type
, "s32") == 0)
1991 return (unsigned long long)(int)val
& 0xffffffff;
1993 if (strncmp(type
, "unsigned ", 9) == 0) {
1998 if (strcmp(type
, "char") == 0) {
2000 return (unsigned long long)(char)val
& 0xff;
2005 if (strcmp(type
, "short") == 0) {
2007 return (unsigned long long)(short)val
& 0xffff;
2009 return val
& 0xffff;
2012 if (strcmp(type
, "int") == 0) {
2014 return (unsigned long long)(int)val
& 0xffffffff;
2016 return val
& 0xffffffff;
2023 * Try to figure out the type.
2025 static unsigned long long
2026 eval_type(unsigned long long val
, struct print_arg
*arg
, int pointer
)
2028 if (arg
->type
!= PRINT_TYPE
) {
2029 do_warning("expected type argument");
2033 return eval_type_str(val
, arg
->typecast
.type
, pointer
);
2036 static int arg_num_eval(struct print_arg
*arg
, long long *val
)
2038 long long left
, right
;
2041 switch (arg
->type
) {
2043 *val
= strtoll(arg
->atom
.atom
, NULL
, 0);
2046 ret
= arg_num_eval(arg
->typecast
.item
, val
);
2049 *val
= eval_type(*val
, arg
, 0);
2052 switch (arg
->op
.op
[0]) {
2054 ret
= arg_num_eval(arg
->op
.left
, &left
);
2057 ret
= arg_num_eval(arg
->op
.right
, &right
);
2061 *val
= left
|| right
;
2063 *val
= left
| right
;
2066 ret
= arg_num_eval(arg
->op
.left
, &left
);
2069 ret
= arg_num_eval(arg
->op
.right
, &right
);
2073 *val
= left
&& right
;
2075 *val
= left
& right
;
2078 ret
= arg_num_eval(arg
->op
.left
, &left
);
2081 ret
= arg_num_eval(arg
->op
.right
, &right
);
2084 switch (arg
->op
.op
[1]) {
2086 *val
= left
< right
;
2089 *val
= left
<< right
;
2092 *val
= left
<= right
;
2095 do_warning("unknown op '%s'", arg
->op
.op
);
2100 ret
= arg_num_eval(arg
->op
.left
, &left
);
2103 ret
= arg_num_eval(arg
->op
.right
, &right
);
2106 switch (arg
->op
.op
[1]) {
2108 *val
= left
> right
;
2111 *val
= left
>> right
;
2114 *val
= left
>= right
;
2117 do_warning("unknown op '%s'", arg
->op
.op
);
2122 ret
= arg_num_eval(arg
->op
.left
, &left
);
2125 ret
= arg_num_eval(arg
->op
.right
, &right
);
2129 if (arg
->op
.op
[1] != '=') {
2130 do_warning("unknown op '%s'", arg
->op
.op
);
2133 *val
= left
== right
;
2136 ret
= arg_num_eval(arg
->op
.left
, &left
);
2139 ret
= arg_num_eval(arg
->op
.right
, &right
);
2143 switch (arg
->op
.op
[1]) {
2145 *val
= left
!= right
;
2148 do_warning("unknown op '%s'", arg
->op
.op
);
2153 /* check for negative */
2154 if (arg
->op
.left
->type
== PRINT_NULL
)
2157 ret
= arg_num_eval(arg
->op
.left
, &left
);
2160 ret
= arg_num_eval(arg
->op
.right
, &right
);
2163 *val
= left
- right
;
2166 if (arg
->op
.left
->type
== PRINT_NULL
)
2169 ret
= arg_num_eval(arg
->op
.left
, &left
);
2172 ret
= arg_num_eval(arg
->op
.right
, &right
);
2175 *val
= left
+ right
;
2178 do_warning("unknown op '%s'", arg
->op
.op
);
2184 case PRINT_FIELD
... PRINT_SYMBOL
:
2188 do_warning("invalid eval type %d", arg
->type
);
2195 static char *arg_eval (struct print_arg
*arg
)
2198 static char buf
[20];
2200 switch (arg
->type
) {
2202 return arg
->atom
.atom
;
2204 return arg_eval(arg
->typecast
.item
);
2206 if (!arg_num_eval(arg
, &val
))
2208 sprintf(buf
, "%lld", val
);
2212 case PRINT_FIELD
... PRINT_SYMBOL
:
2216 do_warning("invalid eval type %d", arg
->type
);
2223 static enum event_type
2224 process_fields(struct event_format
*event
, struct print_flag_sym
**list
, char **tok
)
2226 enum event_type type
;
2227 struct print_arg
*arg
= NULL
;
2228 struct print_flag_sym
*field
;
2234 type
= read_token_item(&token
);
2235 if (test_type_token(type
, token
, EVENT_OP
, "{"))
2243 type
= process_arg(event
, arg
, &token
);
2245 if (type
== EVENT_OP
)
2246 type
= process_op(event
, arg
, &token
);
2248 if (type
== EVENT_ERROR
)
2251 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2254 field
= calloc(1, sizeof(*field
));
2258 value
= arg_eval(arg
);
2260 goto out_free_field
;
2261 field
->value
= strdup(value
);
2262 if (field
->value
== NULL
)
2263 goto out_free_field
;
2271 type
= process_arg(event
, arg
, &token
);
2272 if (test_type_token(type
, token
, EVENT_OP
, "}"))
2273 goto out_free_field
;
2275 value
= arg_eval(arg
);
2277 goto out_free_field
;
2278 field
->str
= strdup(value
);
2279 if (field
->str
== NULL
)
2280 goto out_free_field
;
2285 list
= &field
->next
;
2288 type
= read_token_item(&token
);
2289 } while (type
== EVENT_DELIM
&& strcmp(token
, ",") == 0);
2295 free_flag_sym(field
);
2304 static enum event_type
2305 process_flags(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2307 struct print_arg
*field
;
2308 enum event_type type
;
2311 memset(arg
, 0, sizeof(*arg
));
2312 arg
->type
= PRINT_FLAGS
;
2314 field
= alloc_arg();
2316 do_warning("%s: not enough memory!", __func__
);
2320 type
= process_arg(event
, field
, &token
);
2322 /* Handle operations in the first argument */
2323 while (type
== EVENT_OP
)
2324 type
= process_op(event
, field
, &token
);
2326 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2327 goto out_free_field
;
2330 arg
->flags
.field
= field
;
2332 type
= read_token_item(&token
);
2333 if (event_item_type(type
)) {
2334 arg
->flags
.delim
= token
;
2335 type
= read_token_item(&token
);
2338 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2341 type
= process_fields(event
, &arg
->flags
.flags
, &token
);
2342 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2346 type
= read_token_item(tok
);
2357 static enum event_type
2358 process_symbols(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2360 struct print_arg
*field
;
2361 enum event_type type
;
2364 memset(arg
, 0, sizeof(*arg
));
2365 arg
->type
= PRINT_SYMBOL
;
2367 field
= alloc_arg();
2369 do_warning("%s: not enough memory!", __func__
);
2373 type
= process_arg(event
, field
, &token
);
2374 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2375 goto out_free_field
;
2377 arg
->symbol
.field
= field
;
2379 type
= process_fields(event
, &arg
->symbol
.symbols
, &token
);
2380 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2384 type
= read_token_item(tok
);
2395 static enum event_type
2396 process_hex(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2398 struct print_arg
*field
;
2399 enum event_type type
;
2402 memset(arg
, 0, sizeof(*arg
));
2403 arg
->type
= PRINT_HEX
;
2405 field
= alloc_arg();
2407 do_warning("%s: not enough memory!", __func__
);
2411 type
= process_arg(event
, field
, &token
);
2413 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2416 arg
->hex
.field
= field
;
2420 field
= alloc_arg();
2422 do_warning("%s: not enough memory!", __func__
);
2427 type
= process_arg(event
, field
, &token
);
2429 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2432 arg
->hex
.size
= field
;
2435 type
= read_token_item(tok
);
2445 static enum event_type
2446 process_dynamic_array(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2448 struct format_field
*field
;
2449 enum event_type type
;
2452 memset(arg
, 0, sizeof(*arg
));
2453 arg
->type
= PRINT_DYNAMIC_ARRAY
;
2456 * The item within the parenthesis is another field that holds
2457 * the index into where the array starts.
2459 type
= read_token(&token
);
2461 if (type
!= EVENT_ITEM
)
2464 /* Find the field */
2466 field
= pevent_find_field(event
, token
);
2470 arg
->dynarray
.field
= field
;
2471 arg
->dynarray
.index
= 0;
2473 if (read_expected(EVENT_DELIM
, ")") < 0)
2477 type
= read_token_item(&token
);
2479 if (type
!= EVENT_OP
|| strcmp(token
, "[") != 0)
2485 do_warning("%s: not enough memory!", __func__
);
2490 type
= process_arg(event
, arg
, &token
);
2491 if (type
== EVENT_ERROR
)
2494 if (!test_type_token(type
, token
, EVENT_OP
, "]"))
2498 type
= read_token_item(tok
);
2509 static enum event_type
2510 process_paren(struct event_format
*event
, struct print_arg
*arg
, char **tok
)
2512 struct print_arg
*item_arg
;
2513 enum event_type type
;
2516 type
= process_arg(event
, arg
, &token
);
2518 if (type
== EVENT_ERROR
)
2521 if (type
== EVENT_OP
)
2522 type
= process_op(event
, arg
, &token
);
2524 if (type
== EVENT_ERROR
)
2527 if (test_type_token(type
, token
, EVENT_DELIM
, ")"))
2531 type
= read_token_item(&token
);
2534 * If the next token is an item or another open paren, then
2535 * this was a typecast.
2537 if (event_item_type(type
) ||
2538 (type
== EVENT_DELIM
&& strcmp(token
, "(") == 0)) {
2540 /* make this a typecast and contine */
2542 /* prevous must be an atom */
2543 if (arg
->type
!= PRINT_ATOM
) {
2544 do_warning("previous needed to be PRINT_ATOM");
2548 item_arg
= alloc_arg();
2550 do_warning("%s: not enough memory!", __func__
);
2554 arg
->type
= PRINT_TYPE
;
2555 arg
->typecast
.type
= arg
->atom
.atom
;
2556 arg
->typecast
.item
= item_arg
;
2557 type
= process_arg_token(event
, item_arg
, &token
, type
);
2571 static enum event_type
2572 process_str(struct event_format
*event __maybe_unused
, struct print_arg
*arg
,
2575 enum event_type type
;
2578 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
2581 arg
->type
= PRINT_STRING
;
2582 arg
->string
.string
= token
;
2583 arg
->string
.offset
= -1;
2585 if (read_expected(EVENT_DELIM
, ")") < 0)
2588 type
= read_token(&token
);
2600 static struct pevent_function_handler
*
2601 find_func_handler(struct pevent
*pevent
, char *func_name
)
2603 struct pevent_function_handler
*func
;
2605 for (func
= pevent
->func_handlers
; func
; func
= func
->next
) {
2606 if (strcmp(func
->name
, func_name
) == 0)
2613 static void remove_func_handler(struct pevent
*pevent
, char *func_name
)
2615 struct pevent_function_handler
*func
;
2616 struct pevent_function_handler
**next
;
2618 next
= &pevent
->func_handlers
;
2619 while ((func
= *next
)) {
2620 if (strcmp(func
->name
, func_name
) == 0) {
2622 free_func_handle(func
);
2629 static enum event_type
2630 process_func_handler(struct event_format
*event
, struct pevent_function_handler
*func
,
2631 struct print_arg
*arg
, char **tok
)
2633 struct print_arg
**next_arg
;
2634 struct print_arg
*farg
;
2635 enum event_type type
;
2640 arg
->type
= PRINT_FUNC
;
2641 arg
->func
.func
= func
;
2645 next_arg
= &(arg
->func
.args
);
2646 for (i
= 0; i
< func
->nr_args
; i
++) {
2649 do_warning("%s: not enough memory!", __func__
);
2653 type
= process_arg(event
, farg
, &token
);
2654 if (i
< (func
->nr_args
- 1))
2659 if (test_type_token(type
, token
, EVENT_DELIM
, test
)) {
2666 next_arg
= &(farg
->next
);
2670 type
= read_token(&token
);
2676 static enum event_type
2677 process_function(struct event_format
*event
, struct print_arg
*arg
,
2678 char *token
, char **tok
)
2680 struct pevent_function_handler
*func
;
2682 if (strcmp(token
, "__print_flags") == 0) {
2685 return process_flags(event
, arg
, tok
);
2687 if (strcmp(token
, "__print_symbolic") == 0) {
2689 is_symbolic_field
= 1;
2690 return process_symbols(event
, arg
, tok
);
2692 if (strcmp(token
, "__print_hex") == 0) {
2694 return process_hex(event
, arg
, tok
);
2696 if (strcmp(token
, "__get_str") == 0) {
2698 return process_str(event
, arg
, tok
);
2700 if (strcmp(token
, "__get_dynamic_array") == 0) {
2702 return process_dynamic_array(event
, arg
, tok
);
2705 func
= find_func_handler(event
->pevent
, token
);
2708 return process_func_handler(event
, func
, arg
, tok
);
2711 do_warning("function %s not defined", token
);
2716 static enum event_type
2717 process_arg_token(struct event_format
*event
, struct print_arg
*arg
,
2718 char **tok
, enum event_type type
)
2727 if (strcmp(token
, "REC") == 0) {
2729 type
= process_entry(event
, arg
, &token
);
2733 /* test the next token */
2734 type
= read_token_item(&token
);
2737 * If the next token is a parenthesis, then this
2740 if (type
== EVENT_DELIM
&& strcmp(token
, "(") == 0) {
2743 /* this will free atom. */
2744 type
= process_function(event
, arg
, atom
, &token
);
2747 /* atoms can be more than one token long */
2748 while (type
== EVENT_ITEM
) {
2750 new_atom
= realloc(atom
,
2751 strlen(atom
) + strlen(token
) + 2);
2760 strcat(atom
, token
);
2762 type
= read_token_item(&token
);
2765 arg
->type
= PRINT_ATOM
;
2766 arg
->atom
.atom
= atom
;
2771 arg
->type
= PRINT_ATOM
;
2772 arg
->atom
.atom
= token
;
2773 type
= read_token_item(&token
);
2776 if (strcmp(token
, "(") == 0) {
2778 type
= process_paren(event
, arg
, &token
);
2782 /* handle single ops */
2783 arg
->type
= PRINT_OP
;
2785 arg
->op
.left
= NULL
;
2786 type
= process_op(event
, arg
, &token
);
2788 /* On error, the op is freed */
2789 if (type
== EVENT_ERROR
)
2792 /* return error type if errored */
2795 case EVENT_ERROR
... EVENT_NEWLINE
:
2797 do_warning("unexpected type %d", type
);
2805 static int event_read_print_args(struct event_format
*event
, struct print_arg
**list
)
2807 enum event_type type
= EVENT_ERROR
;
2808 struct print_arg
*arg
;
2813 if (type
== EVENT_NEWLINE
) {
2814 type
= read_token_item(&token
);
2820 do_warning("%s: not enough memory!", __func__
);
2824 type
= process_arg(event
, arg
, &token
);
2826 if (type
== EVENT_ERROR
) {
2835 if (type
== EVENT_OP
) {
2836 type
= process_op(event
, arg
, &token
);
2838 if (type
== EVENT_ERROR
) {
2847 if (type
== EVENT_DELIM
&& strcmp(token
, ",") == 0) {
2854 } while (type
!= EVENT_NONE
);
2856 if (type
!= EVENT_NONE
&& type
!= EVENT_ERROR
)
2862 static int event_read_print(struct event_format
*event
)
2864 enum event_type type
;
2868 if (read_expected_item(EVENT_ITEM
, "print") < 0)
2871 if (read_expected(EVENT_ITEM
, "fmt") < 0)
2874 if (read_expected(EVENT_OP
, ":") < 0)
2877 if (read_expect_type(EVENT_DQUOTE
, &token
) < 0)
2881 event
->print_fmt
.format
= token
;
2882 event
->print_fmt
.args
= NULL
;
2884 /* ok to have no arg */
2885 type
= read_token_item(&token
);
2887 if (type
== EVENT_NONE
)
2890 /* Handle concatenation of print lines */
2891 if (type
== EVENT_DQUOTE
) {
2894 if (asprintf(&cat
, "%s%s", event
->print_fmt
.format
, token
) < 0)
2897 free_token(event
->print_fmt
.format
);
2898 event
->print_fmt
.format
= NULL
;
2903 if (test_type_token(type
, token
, EVENT_DELIM
, ","))
2908 ret
= event_read_print_args(event
, &event
->print_fmt
.args
);
2920 * pevent_find_common_field - return a common field by event
2921 * @event: handle for the event
2922 * @name: the name of the common field to return
2924 * Returns a common field from the event by the given @name.
2925 * This only searchs the common fields and not all field.
2927 struct format_field
*
2928 pevent_find_common_field(struct event_format
*event
, const char *name
)
2930 struct format_field
*format
;
2932 for (format
= event
->format
.common_fields
;
2933 format
; format
= format
->next
) {
2934 if (strcmp(format
->name
, name
) == 0)
2942 * pevent_find_field - find a non-common field
2943 * @event: handle for the event
2944 * @name: the name of the non-common field
2946 * Returns a non-common field by the given @name.
2947 * This does not search common fields.
2949 struct format_field
*
2950 pevent_find_field(struct event_format
*event
, const char *name
)
2952 struct format_field
*format
;
2954 for (format
= event
->format
.fields
;
2955 format
; format
= format
->next
) {
2956 if (strcmp(format
->name
, name
) == 0)
2964 * pevent_find_any_field - find any field by name
2965 * @event: handle for the event
2966 * @name: the name of the field
2968 * Returns a field by the given @name.
2969 * This searchs the common field names first, then
2970 * the non-common ones if a common one was not found.
2972 struct format_field
*
2973 pevent_find_any_field(struct event_format
*event
, const char *name
)
2975 struct format_field
*format
;
2977 format
= pevent_find_common_field(event
, name
);
2980 return pevent_find_field(event
, name
);
2984 * pevent_read_number - read a number from data
2985 * @pevent: handle for the pevent
2986 * @ptr: the raw data
2987 * @size: the size of the data that holds the number
2989 * Returns the number (converted to host) from the
2992 unsigned long long pevent_read_number(struct pevent
*pevent
,
2993 const void *ptr
, int size
)
2997 return *(unsigned char *)ptr
;
2999 return data2host2(pevent
, ptr
);
3001 return data2host4(pevent
, ptr
);
3003 return data2host8(pevent
, ptr
);
3011 * pevent_read_number_field - read a number from data
3012 * @field: a handle to the field
3013 * @data: the raw data to read
3014 * @value: the value to place the number in
3016 * Reads raw data according to a field offset and size,
3017 * and translates it into @value.
3019 * Returns 0 on success, -1 otherwise.
3021 int pevent_read_number_field(struct format_field
*field
, const void *data
,
3022 unsigned long long *value
)
3026 switch (field
->size
) {
3031 *value
= pevent_read_number(field
->event
->pevent
,
3032 data
+ field
->offset
, field
->size
);
3039 static int get_common_info(struct pevent
*pevent
,
3040 const char *type
, int *offset
, int *size
)
3042 struct event_format
*event
;
3043 struct format_field
*field
;
3046 * All events should have the same common elements.
3047 * Pick any event to find where the type is;
3049 if (!pevent
->events
) {
3050 do_warning("no event_list!");
3054 event
= pevent
->events
[0];
3055 field
= pevent_find_common_field(event
, type
);
3059 *offset
= field
->offset
;
3060 *size
= field
->size
;
3065 static int __parse_common(struct pevent
*pevent
, void *data
,
3066 int *size
, int *offset
, const char *name
)
3071 ret
= get_common_info(pevent
, name
, offset
, size
);
3075 return pevent_read_number(pevent
, data
+ *offset
, *size
);
3078 static int trace_parse_common_type(struct pevent
*pevent
, void *data
)
3080 return __parse_common(pevent
, data
,
3081 &pevent
->type_size
, &pevent
->type_offset
,
3085 static int parse_common_pid(struct pevent
*pevent
, void *data
)
3087 return __parse_common(pevent
, data
,
3088 &pevent
->pid_size
, &pevent
->pid_offset
,
3092 static int parse_common_pc(struct pevent
*pevent
, void *data
)
3094 return __parse_common(pevent
, data
,
3095 &pevent
->pc_size
, &pevent
->pc_offset
,
3096 "common_preempt_count");
3099 static int parse_common_flags(struct pevent
*pevent
, void *data
)
3101 return __parse_common(pevent
, data
,
3102 &pevent
->flags_size
, &pevent
->flags_offset
,
3106 static int parse_common_lock_depth(struct pevent
*pevent
, void *data
)
3108 return __parse_common(pevent
, data
,
3109 &pevent
->ld_size
, &pevent
->ld_offset
,
3110 "common_lock_depth");
3113 static int parse_common_migrate_disable(struct pevent
*pevent
, void *data
)
3115 return __parse_common(pevent
, data
,
3116 &pevent
->ld_size
, &pevent
->ld_offset
,
3117 "common_migrate_disable");
3120 static int events_id_cmp(const void *a
, const void *b
);
3123 * pevent_find_event - find an event by given id
3124 * @pevent: a handle to the pevent
3125 * @id: the id of the event
3127 * Returns an event that has a given @id.
3129 struct event_format
*pevent_find_event(struct pevent
*pevent
, int id
)
3131 struct event_format
**eventptr
;
3132 struct event_format key
;
3133 struct event_format
*pkey
= &key
;
3135 /* Check cache first */
3136 if (pevent
->last_event
&& pevent
->last_event
->id
== id
)
3137 return pevent
->last_event
;
3141 eventptr
= bsearch(&pkey
, pevent
->events
, pevent
->nr_events
,
3142 sizeof(*pevent
->events
), events_id_cmp
);
3145 pevent
->last_event
= *eventptr
;
3153 * pevent_find_event_by_name - find an event by given name
3154 * @pevent: a handle to the pevent
3155 * @sys: the system name to search for
3156 * @name: the name of the event to search for
3158 * This returns an event with a given @name and under the system
3159 * @sys. If @sys is NULL the first event with @name is returned.
3161 struct event_format
*
3162 pevent_find_event_by_name(struct pevent
*pevent
,
3163 const char *sys
, const char *name
)
3165 struct event_format
*event
;
3168 if (pevent
->last_event
&&
3169 strcmp(pevent
->last_event
->name
, name
) == 0 &&
3170 (!sys
|| strcmp(pevent
->last_event
->system
, sys
) == 0))
3171 return pevent
->last_event
;
3173 for (i
= 0; i
< pevent
->nr_events
; i
++) {
3174 event
= pevent
->events
[i
];
3175 if (strcmp(event
->name
, name
) == 0) {
3178 if (strcmp(event
->system
, sys
) == 0)
3182 if (i
== pevent
->nr_events
)
3185 pevent
->last_event
= event
;
3189 static unsigned long long
3190 eval_num_arg(void *data
, int size
, struct event_format
*event
, struct print_arg
*arg
)
3192 struct pevent
*pevent
= event
->pevent
;
3193 unsigned long long val
= 0;
3194 unsigned long long left
, right
;
3195 struct print_arg
*typearg
= NULL
;
3196 struct print_arg
*larg
;
3197 unsigned long offset
;
3198 unsigned int field_size
;
3200 switch (arg
->type
) {
3205 return strtoull(arg
->atom
.atom
, NULL
, 0);
3207 if (!arg
->field
.field
) {
3208 arg
->field
.field
= pevent_find_any_field(event
, arg
->field
.name
);
3209 if (!arg
->field
.field
)
3210 goto out_warning_field
;
3213 /* must be a number */
3214 val
= pevent_read_number(pevent
, data
+ arg
->field
.field
->offset
,
3215 arg
->field
.field
->size
);
3222 val
= eval_num_arg(data
, size
, event
, arg
->typecast
.item
);
3223 return eval_type(val
, arg
, 0);
3230 val
= process_defined_func(&s
, data
, size
, event
, arg
);
3231 trace_seq_destroy(&s
);
3235 if (strcmp(arg
->op
.op
, "[") == 0) {
3237 * Arrays are special, since we don't want
3238 * to read the arg as is.
3240 right
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3242 /* handle typecasts */
3243 larg
= arg
->op
.left
;
3244 while (larg
->type
== PRINT_TYPE
) {
3247 larg
= larg
->typecast
.item
;
3250 /* Default to long size */
3251 field_size
= pevent
->long_size
;
3253 switch (larg
->type
) {
3254 case PRINT_DYNAMIC_ARRAY
:
3255 offset
= pevent_read_number(pevent
,
3256 data
+ larg
->dynarray
.field
->offset
,
3257 larg
->dynarray
.field
->size
);
3258 if (larg
->dynarray
.field
->elementsize
)
3259 field_size
= larg
->dynarray
.field
->elementsize
;
3261 * The actual length of the dynamic array is stored
3262 * in the top half of the field, and the offset
3263 * is in the bottom half of the 32 bit field.
3269 if (!larg
->field
.field
) {
3271 pevent_find_any_field(event
, larg
->field
.name
);
3272 if (!larg
->field
.field
) {
3274 goto out_warning_field
;
3277 field_size
= larg
->field
.field
->elementsize
;
3278 offset
= larg
->field
.field
->offset
+
3279 right
* larg
->field
.field
->elementsize
;
3282 goto default_op
; /* oops, all bets off */
3284 val
= pevent_read_number(pevent
,
3285 data
+ offset
, field_size
);
3287 val
= eval_type(val
, typearg
, 1);
3289 } else if (strcmp(arg
->op
.op
, "?") == 0) {
3290 left
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3291 arg
= arg
->op
.right
;
3293 val
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3295 val
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3299 left
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3300 right
= eval_num_arg(data
, size
, event
, arg
->op
.right
);
3301 switch (arg
->op
.op
[0]) {
3303 switch (arg
->op
.op
[1]) {
3308 val
= left
!= right
;
3311 goto out_warning_op
;
3319 val
= left
|| right
;
3325 val
= left
&& right
;
3330 switch (arg
->op
.op
[1]) {
3335 val
= left
<< right
;
3338 val
= left
<= right
;
3341 goto out_warning_op
;
3345 switch (arg
->op
.op
[1]) {
3350 val
= left
>> right
;
3353 val
= left
>= right
;
3356 goto out_warning_op
;
3360 if (arg
->op
.op
[1] != '=')
3361 goto out_warning_op
;
3363 val
= left
== right
;
3378 goto out_warning_op
;
3381 default: /* not sure what to do there */
3387 do_warning("%s: unknown op '%s'", __func__
, arg
->op
.op
);
3391 do_warning("%s: field %s not found", __func__
, arg
->field
.name
);
3397 unsigned long long value
;
3400 static const struct flag flags
[] = {
3401 { "HI_SOFTIRQ", 0 },
3402 { "TIMER_SOFTIRQ", 1 },
3403 { "NET_TX_SOFTIRQ", 2 },
3404 { "NET_RX_SOFTIRQ", 3 },
3405 { "BLOCK_SOFTIRQ", 4 },
3406 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3407 { "TASKLET_SOFTIRQ", 6 },
3408 { "SCHED_SOFTIRQ", 7 },
3409 { "HRTIMER_SOFTIRQ", 8 },
3410 { "RCU_SOFTIRQ", 9 },
3412 { "HRTIMER_NORESTART", 0 },
3413 { "HRTIMER_RESTART", 1 },
3416 static unsigned long long eval_flag(const char *flag
)
3421 * Some flags in the format files do not get converted.
3422 * If the flag is not numeric, see if it is something that
3423 * we already know about.
3425 if (isdigit(flag
[0]))
3426 return strtoull(flag
, NULL
, 0);
3428 for (i
= 0; i
< (int)(sizeof(flags
)/sizeof(flags
[0])); i
++)
3429 if (strcmp(flags
[i
].name
, flag
) == 0)
3430 return flags
[i
].value
;
3435 static void print_str_to_seq(struct trace_seq
*s
, const char *format
,
3436 int len_arg
, const char *str
)
3439 trace_seq_printf(s
, format
, len_arg
, str
);
3441 trace_seq_printf(s
, format
, str
);
3444 static void print_str_arg(struct trace_seq
*s
, void *data
, int size
,
3445 struct event_format
*event
, const char *format
,
3446 int len_arg
, struct print_arg
*arg
)
3448 struct pevent
*pevent
= event
->pevent
;
3449 struct print_flag_sym
*flag
;
3450 struct format_field
*field
;
3451 unsigned long long val
, fval
;
3458 switch (arg
->type
) {
3463 print_str_to_seq(s
, format
, len_arg
, arg
->atom
.atom
);
3466 field
= arg
->field
.field
;
3468 field
= pevent_find_any_field(event
, arg
->field
.name
);
3470 str
= arg
->field
.name
;
3471 goto out_warning_field
;
3473 arg
->field
.field
= field
;
3475 /* Zero sized fields, mean the rest of the data */
3476 len
= field
->size
? : size
- field
->offset
;
3479 * Some events pass in pointers. If this is not an array
3480 * and the size is the same as long_size, assume that it
3483 if (!(field
->flags
& FIELD_IS_ARRAY
) &&
3484 field
->size
== pevent
->long_size
) {
3485 addr
= *(unsigned long *)(data
+ field
->offset
);
3486 trace_seq_printf(s
, "%lx", addr
);
3489 str
= malloc(len
+ 1);
3491 do_warning("%s: not enough memory!", __func__
);
3494 memcpy(str
, data
+ field
->offset
, len
);
3496 print_str_to_seq(s
, format
, len_arg
, str
);
3500 val
= eval_num_arg(data
, size
, event
, arg
->flags
.field
);
3502 for (flag
= arg
->flags
.flags
; flag
; flag
= flag
->next
) {
3503 fval
= eval_flag(flag
->value
);
3504 if (!val
&& !fval
) {
3505 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3508 if (fval
&& (val
& fval
) == fval
) {
3509 if (print
&& arg
->flags
.delim
)
3510 trace_seq_puts(s
, arg
->flags
.delim
);
3511 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3518 val
= eval_num_arg(data
, size
, event
, arg
->symbol
.field
);
3519 for (flag
= arg
->symbol
.symbols
; flag
; flag
= flag
->next
) {
3520 fval
= eval_flag(flag
->value
);
3522 print_str_to_seq(s
, format
, len_arg
, flag
->str
);
3528 field
= arg
->hex
.field
->field
.field
;
3530 str
= arg
->hex
.field
->field
.name
;
3531 field
= pevent_find_any_field(event
, str
);
3533 goto out_warning_field
;
3534 arg
->hex
.field
->field
.field
= field
;
3536 hex
= data
+ field
->offset
;
3537 len
= eval_num_arg(data
, size
, event
, arg
->hex
.size
);
3538 for (i
= 0; i
< len
; i
++) {
3540 trace_seq_putc(s
, ' ');
3541 trace_seq_printf(s
, "%02x", hex
[i
]);
3547 case PRINT_STRING
: {
3550 if (arg
->string
.offset
== -1) {
3551 struct format_field
*f
;
3553 f
= pevent_find_any_field(event
, arg
->string
.string
);
3554 arg
->string
.offset
= f
->offset
;
3556 str_offset
= data2host4(pevent
, data
+ arg
->string
.offset
);
3557 str_offset
&= 0xffff;
3558 print_str_to_seq(s
, format
, len_arg
, ((char *)data
) + str_offset
);
3562 print_str_to_seq(s
, format
, len_arg
, arg
->string
.string
);
3566 * The only op for string should be ? :
3568 if (arg
->op
.op
[0] != '?')
3570 val
= eval_num_arg(data
, size
, event
, arg
->op
.left
);
3572 print_str_arg(s
, data
, size
, event
,
3573 format
, len_arg
, arg
->op
.right
->op
.left
);
3575 print_str_arg(s
, data
, size
, event
,
3576 format
, len_arg
, arg
->op
.right
->op
.right
);
3579 process_defined_func(s
, data
, size
, event
, arg
);
3589 do_warning("%s: field %s not found", __func__
, arg
->field
.name
);
3592 static unsigned long long
3593 process_defined_func(struct trace_seq
*s
, void *data
, int size
,
3594 struct event_format
*event
, struct print_arg
*arg
)
3596 struct pevent_function_handler
*func_handle
= arg
->func
.func
;
3597 struct pevent_func_params
*param
;
3598 unsigned long long *args
;
3599 unsigned long long ret
;
3600 struct print_arg
*farg
;
3601 struct trace_seq str
;
3603 struct save_str
*next
;
3605 } *strings
= NULL
, *string
;
3608 if (!func_handle
->nr_args
) {
3609 ret
= (*func_handle
->func
)(s
, NULL
);
3613 farg
= arg
->func
.args
;
3614 param
= func_handle
->params
;
3617 args
= malloc(sizeof(*args
) * func_handle
->nr_args
);
3621 for (i
= 0; i
< func_handle
->nr_args
; i
++) {
3622 switch (param
->type
) {
3623 case PEVENT_FUNC_ARG_INT
:
3624 case PEVENT_FUNC_ARG_LONG
:
3625 case PEVENT_FUNC_ARG_PTR
:
3626 args
[i
] = eval_num_arg(data
, size
, event
, farg
);
3628 case PEVENT_FUNC_ARG_STRING
:
3629 trace_seq_init(&str
);
3630 print_str_arg(&str
, data
, size
, event
, "%s", -1, farg
);
3631 trace_seq_terminate(&str
);
3632 string
= malloc(sizeof(*string
));
3634 do_warning("%s(%d): malloc str", __func__
, __LINE__
);
3637 string
->next
= strings
;
3638 string
->str
= strdup(str
.buffer
);
3641 do_warning("%s(%d): malloc str", __func__
, __LINE__
);
3644 args
[i
] = (uintptr_t)string
->str
;
3646 trace_seq_destroy(&str
);
3650 * Something went totally wrong, this is not
3651 * an input error, something in this code broke.
3653 do_warning("Unexpected end of arguments\n");
3657 param
= param
->next
;
3660 ret
= (*func_handle
->func
)(s
, args
);
3665 strings
= string
->next
;
3671 /* TBD : handle return type here */
3675 static void free_args(struct print_arg
*args
)
3677 struct print_arg
*next
;
3687 static struct print_arg
*make_bprint_args(char *fmt
, void *data
, int size
, struct event_format
*event
)
3689 struct pevent
*pevent
= event
->pevent
;
3690 struct format_field
*field
, *ip_field
;
3691 struct print_arg
*args
, *arg
, **next
;
3692 unsigned long long ip
, val
;
3697 field
= pevent
->bprint_buf_field
;
3698 ip_field
= pevent
->bprint_ip_field
;
3701 field
= pevent_find_field(event
, "buf");
3703 do_warning("can't find buffer field for binary printk");
3706 ip_field
= pevent_find_field(event
, "ip");
3708 do_warning("can't find ip field for binary printk");
3711 pevent
->bprint_buf_field
= field
;
3712 pevent
->bprint_ip_field
= ip_field
;
3715 ip
= pevent_read_number(pevent
, data
+ ip_field
->offset
, ip_field
->size
);
3718 * The first arg is the IP pointer.
3722 do_warning("%s(%d): not enough memory!", __func__
, __LINE__
);
3729 arg
->type
= PRINT_ATOM
;
3731 if (asprintf(&arg
->atom
.atom
, "%lld", ip
) < 0)
3734 /* skip the first "%pf : " */
3735 for (ptr
= fmt
+ 6, bptr
= data
+ field
->offset
;
3736 bptr
< data
+ size
&& *ptr
; ptr
++) {
3767 vsize
= pevent
->long_size
;
3781 /* the pointers are always 4 bytes aligned */
3782 bptr
= (void *)(((unsigned long)bptr
+ 3) &
3784 val
= pevent_read_number(pevent
, bptr
, vsize
);
3788 do_warning("%s(%d): not enough memory!",
3789 __func__
, __LINE__
);
3793 arg
->type
= PRINT_ATOM
;
3794 if (asprintf(&arg
->atom
.atom
, "%lld", val
) < 0) {
3801 * The '*' case means that an arg is used as the length.
3802 * We need to continue to figure out for what.
3811 do_warning("%s(%d): not enough memory!",
3812 __func__
, __LINE__
);
3816 arg
->type
= PRINT_BSTRING
;
3817 arg
->string
.string
= strdup(bptr
);
3818 if (!arg
->string
.string
)
3820 bptr
+= strlen(bptr
) + 1;
3837 get_bprint_format(void *data
, int size __maybe_unused
,
3838 struct event_format
*event
)
3840 struct pevent
*pevent
= event
->pevent
;
3841 unsigned long long addr
;
3842 struct format_field
*field
;
3843 struct printk_map
*printk
;
3847 field
= pevent
->bprint_fmt_field
;
3850 field
= pevent_find_field(event
, "fmt");
3852 do_warning("can't find format field for binary printk");
3855 pevent
->bprint_fmt_field
= field
;
3858 addr
= pevent_read_number(pevent
, data
+ field
->offset
, field
->size
);
3860 printk
= find_printk(pevent
, addr
);
3862 if (asprintf(&format
, "%%pf : (NO FORMAT FOUND at %llx)\n", addr
) < 0)
3868 /* Remove any quotes. */
3871 if (asprintf(&format
, "%s : %s", "%pf", p
) < 0)
3873 /* remove ending quotes and new line since we will add one too */
3874 p
= format
+ strlen(format
) - 1;
3879 if (strcmp(p
, "\\n") == 0)
3885 static void print_mac_arg(struct trace_seq
*s
, int mac
, void *data
, int size
,
3886 struct event_format
*event
, struct print_arg
*arg
)
3889 char *fmt
= "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3891 if (arg
->type
== PRINT_FUNC
) {
3892 process_defined_func(s
, data
, size
, event
, arg
);
3896 if (arg
->type
!= PRINT_FIELD
) {
3897 trace_seq_printf(s
, "ARG TYPE NOT FIELD BUT %d",
3903 fmt
= "%.2x%.2x%.2x%.2x%.2x%.2x";
3904 if (!arg
->field
.field
) {
3906 pevent_find_any_field(event
, arg
->field
.name
);
3907 if (!arg
->field
.field
) {
3908 do_warning("%s: field %s not found",
3909 __func__
, arg
->field
.name
);
3913 if (arg
->field
.field
->size
!= 6) {
3914 trace_seq_printf(s
, "INVALIDMAC");
3917 buf
= data
+ arg
->field
.field
->offset
;
3918 trace_seq_printf(s
, fmt
, buf
[0], buf
[1], buf
[2], buf
[3], buf
[4], buf
[5]);
3921 static int is_printable_array(char *p
, unsigned int len
)
3925 for (i
= 0; i
< len
&& p
[i
]; i
++)
3931 static void print_event_fields(struct trace_seq
*s
, void *data
, int size
,
3932 struct event_format
*event
)
3934 struct format_field
*field
;
3935 unsigned long long val
;
3936 unsigned int offset
, len
, i
;
3938 field
= event
->format
.fields
;
3940 trace_seq_printf(s
, " %s=", field
->name
);
3941 if (field
->flags
& FIELD_IS_ARRAY
) {
3942 offset
= field
->offset
;
3944 if (field
->flags
& FIELD_IS_DYNAMIC
) {
3945 val
= pevent_read_number(event
->pevent
, data
+ offset
, len
);
3950 if (field
->flags
& FIELD_IS_STRING
&&
3951 is_printable_array(data
+ offset
, len
)) {
3952 trace_seq_printf(s
, "%s", (char *)data
+ offset
);
3954 trace_seq_puts(s
, "ARRAY[");
3955 for (i
= 0; i
< len
; i
++) {
3957 trace_seq_puts(s
, ", ");
3958 trace_seq_printf(s
, "%02x",
3959 *((unsigned char *)data
+ offset
+ i
));
3961 trace_seq_putc(s
, ']');
3962 field
->flags
&= ~FIELD_IS_STRING
;
3965 val
= pevent_read_number(event
->pevent
, data
+ field
->offset
,
3967 if (field
->flags
& FIELD_IS_POINTER
) {
3968 trace_seq_printf(s
, "0x%llx", val
);
3969 } else if (field
->flags
& FIELD_IS_SIGNED
) {
3970 switch (field
->size
) {
3973 * If field is long then print it in hex.
3974 * A long usually stores pointers.
3976 if (field
->flags
& FIELD_IS_LONG
)
3977 trace_seq_printf(s
, "0x%x", (int)val
);
3979 trace_seq_printf(s
, "%d", (int)val
);
3982 trace_seq_printf(s
, "%2d", (short)val
);
3985 trace_seq_printf(s
, "%1d", (char)val
);
3988 trace_seq_printf(s
, "%lld", val
);
3991 if (field
->flags
& FIELD_IS_LONG
)
3992 trace_seq_printf(s
, "0x%llx", val
);
3994 trace_seq_printf(s
, "%llu", val
);
3997 field
= field
->next
;
4001 static void pretty_print(struct trace_seq
*s
, void *data
, int size
, struct event_format
*event
)
4003 struct pevent
*pevent
= event
->pevent
;
4004 struct print_fmt
*print_fmt
= &event
->print_fmt
;
4005 struct print_arg
*arg
= print_fmt
->args
;
4006 struct print_arg
*args
= NULL
;
4007 const char *ptr
= print_fmt
->format
;
4008 unsigned long long val
;
4009 struct func_map
*func
;
4010 const char *saveptr
;
4011 char *bprint_fmt
= NULL
;
4019 if (event
->flags
& EVENT_FL_FAILED
) {
4020 trace_seq_printf(s
, "[FAILED TO PARSE]");
4021 print_event_fields(s
, data
, size
, event
);
4025 if (event
->flags
& EVENT_FL_ISBPRINT
) {
4026 bprint_fmt
= get_bprint_format(data
, size
, event
);
4027 args
= make_bprint_args(bprint_fmt
, data
, size
, event
);
4032 for (; *ptr
; ptr
++) {
4038 trace_seq_putc(s
, '\n');
4041 trace_seq_putc(s
, '\t');
4044 trace_seq_putc(s
, '\r');
4047 trace_seq_putc(s
, '\\');
4050 trace_seq_putc(s
, *ptr
);
4054 } else if (*ptr
== '%') {
4062 trace_seq_putc(s
, '%');
4065 /* FIXME: need to handle properly */
4077 /* The argument is the length. */
4079 do_warning("no argument match");
4080 event
->flags
|= EVENT_FL_FAILED
;
4083 len_arg
= eval_num_arg(data
, size
, event
, arg
);
4093 if (pevent
->long_size
== 4)
4098 if (*(ptr
+1) == 'F' ||
4102 } else if (*(ptr
+1) == 'M' || *(ptr
+1) == 'm') {
4103 print_mac_arg(s
, *(ptr
+1), data
, size
, event
, arg
);
4116 do_warning("no argument match");
4117 event
->flags
|= EVENT_FL_FAILED
;
4121 len
= ((unsigned long)ptr
+ 1) -
4122 (unsigned long)saveptr
;
4124 /* should never happen */
4126 do_warning("bad format!");
4127 event
->flags
|= EVENT_FL_FAILED
;
4131 memcpy(format
, saveptr
, len
);
4134 val
= eval_num_arg(data
, size
, event
, arg
);
4138 func
= find_func(pevent
, val
);
4140 trace_seq_puts(s
, func
->func
);
4141 if (show_func
== 'F')
4148 if (pevent
->long_size
== 8 && ls
&&
4149 sizeof(long) != 8) {
4153 /* make %l into %ll */
4154 p
= strchr(format
, 'l');
4156 memmove(p
+1, p
, strlen(p
)+1);
4157 else if (strcmp(format
, "%p") == 0)
4158 strcpy(format
, "0x%llx");
4163 trace_seq_printf(s
, format
, len_arg
, (char)val
);
4165 trace_seq_printf(s
, format
, (char)val
);
4169 trace_seq_printf(s
, format
, len_arg
, (short)val
);
4171 trace_seq_printf(s
, format
, (short)val
);
4175 trace_seq_printf(s
, format
, len_arg
, (int)val
);
4177 trace_seq_printf(s
, format
, (int)val
);
4181 trace_seq_printf(s
, format
, len_arg
, (long)val
);
4183 trace_seq_printf(s
, format
, (long)val
);
4187 trace_seq_printf(s
, format
, len_arg
,
4190 trace_seq_printf(s
, format
, (long long)val
);
4193 do_warning("bad count (%d)", ls
);
4194 event
->flags
|= EVENT_FL_FAILED
;
4199 do_warning("no matching argument");
4200 event
->flags
|= EVENT_FL_FAILED
;
4204 len
= ((unsigned long)ptr
+ 1) -
4205 (unsigned long)saveptr
;
4207 /* should never happen */
4209 do_warning("bad format!");
4210 event
->flags
|= EVENT_FL_FAILED
;
4214 memcpy(format
, saveptr
, len
);
4218 print_str_arg(s
, data
, size
, event
,
4219 format
, len_arg
, arg
);
4223 trace_seq_printf(s
, ">%c<", *ptr
);
4227 trace_seq_putc(s
, *ptr
);
4230 if (event
->flags
& EVENT_FL_FAILED
) {
4232 trace_seq_printf(s
, "[FAILED TO PARSE]");
4242 * pevent_data_lat_fmt - parse the data for the latency format
4243 * @pevent: a handle to the pevent
4244 * @s: the trace_seq to write to
4245 * @record: the record to read from
4247 * This parses out the Latency format (interrupts disabled,
4248 * need rescheduling, in hard/soft interrupt, preempt count
4249 * and lock depth) and places it into the trace_seq.
4251 void pevent_data_lat_fmt(struct pevent
*pevent
,
4252 struct trace_seq
*s
, struct pevent_record
*record
)
4254 static int check_lock_depth
= 1;
4255 static int check_migrate_disable
= 1;
4256 static int lock_depth_exists
;
4257 static int migrate_disable_exists
;
4258 unsigned int lat_flags
;
4261 int migrate_disable
;
4264 void *data
= record
->data
;
4266 lat_flags
= parse_common_flags(pevent
, data
);
4267 pc
= parse_common_pc(pevent
, data
);
4268 /* lock_depth may not always exist */
4269 if (lock_depth_exists
)
4270 lock_depth
= parse_common_lock_depth(pevent
, data
);
4271 else if (check_lock_depth
) {
4272 lock_depth
= parse_common_lock_depth(pevent
, data
);
4274 check_lock_depth
= 0;
4276 lock_depth_exists
= 1;
4279 /* migrate_disable may not always exist */
4280 if (migrate_disable_exists
)
4281 migrate_disable
= parse_common_migrate_disable(pevent
, data
);
4282 else if (check_migrate_disable
) {
4283 migrate_disable
= parse_common_migrate_disable(pevent
, data
);
4284 if (migrate_disable
< 0)
4285 check_migrate_disable
= 0;
4287 migrate_disable_exists
= 1;
4290 hardirq
= lat_flags
& TRACE_FLAG_HARDIRQ
;
4291 softirq
= lat_flags
& TRACE_FLAG_SOFTIRQ
;
4293 trace_seq_printf(s
, "%c%c%c",
4294 (lat_flags
& TRACE_FLAG_IRQS_OFF
) ? 'd' :
4295 (lat_flags
& TRACE_FLAG_IRQS_NOSUPPORT
) ?
4297 (lat_flags
& TRACE_FLAG_NEED_RESCHED
) ?
4299 (hardirq
&& softirq
) ? 'H' :
4300 hardirq
? 'h' : softirq
? 's' : '.');
4303 trace_seq_printf(s
, "%x", pc
);
4305 trace_seq_putc(s
, '.');
4307 if (migrate_disable_exists
) {
4308 if (migrate_disable
< 0)
4309 trace_seq_putc(s
, '.');
4311 trace_seq_printf(s
, "%d", migrate_disable
);
4314 if (lock_depth_exists
) {
4316 trace_seq_putc(s
, '.');
4318 trace_seq_printf(s
, "%d", lock_depth
);
4321 trace_seq_terminate(s
);
4325 * pevent_data_type - parse out the given event type
4326 * @pevent: a handle to the pevent
4327 * @rec: the record to read from
4329 * This returns the event id from the @rec.
4331 int pevent_data_type(struct pevent
*pevent
, struct pevent_record
*rec
)
4333 return trace_parse_common_type(pevent
, rec
->data
);
4337 * pevent_data_event_from_type - find the event by a given type
4338 * @pevent: a handle to the pevent
4339 * @type: the type of the event.
4341 * This returns the event form a given @type;
4343 struct event_format
*pevent_data_event_from_type(struct pevent
*pevent
, int type
)
4345 return pevent_find_event(pevent
, type
);
4349 * pevent_data_pid - parse the PID from raw data
4350 * @pevent: a handle to the pevent
4351 * @rec: the record to parse
4353 * This returns the PID from a raw data.
4355 int pevent_data_pid(struct pevent
*pevent
, struct pevent_record
*rec
)
4357 return parse_common_pid(pevent
, rec
->data
);
4361 * pevent_data_comm_from_pid - return the command line from PID
4362 * @pevent: a handle to the pevent
4363 * @pid: the PID of the task to search for
4365 * This returns a pointer to the command line that has the given
4368 const char *pevent_data_comm_from_pid(struct pevent
*pevent
, int pid
)
4372 comm
= find_cmdline(pevent
, pid
);
4377 * pevent_data_comm_from_pid - parse the data into the print format
4378 * @s: the trace_seq to write to
4379 * @event: the handle to the event
4380 * @record: the record to read from
4382 * This parses the raw @data using the given @event information and
4383 * writes the print format into the trace_seq.
4385 void pevent_event_info(struct trace_seq
*s
, struct event_format
*event
,
4386 struct pevent_record
*record
)
4388 int print_pretty
= 1;
4390 if (event
->pevent
->print_raw
)
4391 print_event_fields(s
, record
->data
, record
->size
, event
);
4395 print_pretty
= event
->handler(s
, record
, event
,
4399 pretty_print(s
, record
->data
, record
->size
, event
);
4402 trace_seq_terminate(s
);
4405 void pevent_print_event(struct pevent
*pevent
, struct trace_seq
*s
,
4406 struct pevent_record
*record
)
4408 static char *spaces
= " "; /* 20 spaces */
4409 struct event_format
*event
;
4411 unsigned long usecs
;
4412 unsigned long nsecs
;
4414 void *data
= record
->data
;
4420 secs
= record
->ts
/ NSECS_PER_SEC
;
4421 nsecs
= record
->ts
- secs
* NSECS_PER_SEC
;
4423 if (record
->size
< 0) {
4424 do_warning("ug! negative record size %d", record
->size
);
4428 type
= trace_parse_common_type(pevent
, data
);
4430 event
= pevent_find_event(pevent
, type
);
4432 do_warning("ug! no event found for type %d", type
);
4436 pid
= parse_common_pid(pevent
, data
);
4437 comm
= find_cmdline(pevent
, pid
);
4439 if (pevent
->latency_format
) {
4440 trace_seq_printf(s
, "%8.8s-%-5d %3d",
4441 comm
, pid
, record
->cpu
);
4442 pevent_data_lat_fmt(pevent
, s
, record
);
4444 trace_seq_printf(s
, "%16s-%-5d [%03d]", comm
, pid
, record
->cpu
);
4446 if (pevent
->flags
& PEVENT_NSEC_OUTPUT
) {
4450 usecs
= (nsecs
+ 500) / NSECS_PER_USEC
;
4454 trace_seq_printf(s
, " %5lu.%0*lu: %s: ", secs
, p
, usecs
, event
->name
);
4456 /* Space out the event names evenly. */
4457 len
= strlen(event
->name
);
4459 trace_seq_printf(s
, "%.*s", 20 - len
, spaces
);
4461 pevent_event_info(s
, event
, record
);
4464 static int events_id_cmp(const void *a
, const void *b
)
4466 struct event_format
* const * ea
= a
;
4467 struct event_format
* const * eb
= b
;
4469 if ((*ea
)->id
< (*eb
)->id
)
4472 if ((*ea
)->id
> (*eb
)->id
)
4478 static int events_name_cmp(const void *a
, const void *b
)
4480 struct event_format
* const * ea
= a
;
4481 struct event_format
* const * eb
= b
;
4484 res
= strcmp((*ea
)->name
, (*eb
)->name
);
4488 res
= strcmp((*ea
)->system
, (*eb
)->system
);
4492 return events_id_cmp(a
, b
);
4495 static int events_system_cmp(const void *a
, const void *b
)
4497 struct event_format
* const * ea
= a
;
4498 struct event_format
* const * eb
= b
;
4501 res
= strcmp((*ea
)->system
, (*eb
)->system
);
4505 res
= strcmp((*ea
)->name
, (*eb
)->name
);
4509 return events_id_cmp(a
, b
);
4512 struct event_format
**pevent_list_events(struct pevent
*pevent
, enum event_sort_type sort_type
)
4514 struct event_format
**events
;
4515 int (*sort
)(const void *a
, const void *b
);
4517 events
= pevent
->sort_events
;
4519 if (events
&& pevent
->last_type
== sort_type
)
4523 events
= malloc(sizeof(*events
) * (pevent
->nr_events
+ 1));
4527 memcpy(events
, pevent
->events
, sizeof(*events
) * pevent
->nr_events
);
4528 events
[pevent
->nr_events
] = NULL
;
4530 pevent
->sort_events
= events
;
4532 /* the internal events are sorted by id */
4533 if (sort_type
== EVENT_SORT_ID
) {
4534 pevent
->last_type
= sort_type
;
4539 switch (sort_type
) {
4541 sort
= events_id_cmp
;
4543 case EVENT_SORT_NAME
:
4544 sort
= events_name_cmp
;
4546 case EVENT_SORT_SYSTEM
:
4547 sort
= events_system_cmp
;
4553 qsort(events
, pevent
->nr_events
, sizeof(*events
), sort
);
4554 pevent
->last_type
= sort_type
;
4559 static struct format_field
**
4560 get_event_fields(const char *type
, const char *name
,
4561 int count
, struct format_field
*list
)
4563 struct format_field
**fields
;
4564 struct format_field
*field
;
4567 fields
= malloc(sizeof(*fields
) * (count
+ 1));
4571 for (field
= list
; field
; field
= field
->next
) {
4572 fields
[i
++] = field
;
4573 if (i
== count
+ 1) {
4574 do_warning("event %s has more %s fields than specified",
4582 do_warning("event %s has less %s fields than specified",
4591 * pevent_event_common_fields - return a list of common fields for an event
4592 * @event: the event to return the common fields of.
4594 * Returns an allocated array of fields. The last item in the array is NULL.
4595 * The array must be freed with free().
4597 struct format_field
**pevent_event_common_fields(struct event_format
*event
)
4599 return get_event_fields("common", event
->name
,
4600 event
->format
.nr_common
,
4601 event
->format
.common_fields
);
4605 * pevent_event_fields - return a list of event specific fields for an event
4606 * @event: the event to return the fields of.
4608 * Returns an allocated array of fields. The last item in the array is NULL.
4609 * The array must be freed with free().
4611 struct format_field
**pevent_event_fields(struct event_format
*event
)
4613 return get_event_fields("event", event
->name
,
4614 event
->format
.nr_fields
,
4615 event
->format
.fields
);
4618 static void print_fields(struct trace_seq
*s
, struct print_flag_sym
*field
)
4620 trace_seq_printf(s
, "{ %s, %s }", field
->value
, field
->str
);
4622 trace_seq_puts(s
, ", ");
4623 print_fields(s
, field
->next
);
4628 static void print_args(struct print_arg
*args
)
4630 int print_paren
= 1;
4633 switch (args
->type
) {
4638 printf("%s", args
->atom
.atom
);
4641 printf("REC->%s", args
->field
.name
);
4644 printf("__print_flags(");
4645 print_args(args
->flags
.field
);
4646 printf(", %s, ", args
->flags
.delim
);
4648 print_fields(&s
, args
->flags
.flags
);
4649 trace_seq_do_printf(&s
);
4650 trace_seq_destroy(&s
);
4654 printf("__print_symbolic(");
4655 print_args(args
->symbol
.field
);
4658 print_fields(&s
, args
->symbol
.symbols
);
4659 trace_seq_do_printf(&s
);
4660 trace_seq_destroy(&s
);
4664 printf("__print_hex(");
4665 print_args(args
->hex
.field
);
4667 print_args(args
->hex
.size
);
4672 printf("__get_str(%s)", args
->string
.string
);
4675 printf("(%s)", args
->typecast
.type
);
4676 print_args(args
->typecast
.item
);
4679 if (strcmp(args
->op
.op
, ":") == 0)
4683 print_args(args
->op
.left
);
4684 printf(" %s ", args
->op
.op
);
4685 print_args(args
->op
.right
);
4690 /* we should warn... */
4695 print_args(args
->next
);
4699 static void parse_header_field(const char *field
,
4700 int *offset
, int *size
, int mandatory
)
4702 unsigned long long save_input_buf_ptr
;
4703 unsigned long long save_input_buf_siz
;
4707 save_input_buf_ptr
= input_buf_ptr
;
4708 save_input_buf_siz
= input_buf_siz
;
4710 if (read_expected(EVENT_ITEM
, "field") < 0)
4712 if (read_expected(EVENT_OP
, ":") < 0)
4716 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4721 * If this is not a mandatory field, then test it first.
4724 if (read_expected(EVENT_ITEM
, field
) < 0)
4727 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4729 if (strcmp(token
, field
) != 0)
4734 if (read_expected(EVENT_OP
, ";") < 0)
4736 if (read_expected(EVENT_ITEM
, "offset") < 0)
4738 if (read_expected(EVENT_OP
, ":") < 0)
4740 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4742 *offset
= atoi(token
);
4744 if (read_expected(EVENT_OP
, ";") < 0)
4746 if (read_expected(EVENT_ITEM
, "size") < 0)
4748 if (read_expected(EVENT_OP
, ":") < 0)
4750 if (read_expect_type(EVENT_ITEM
, &token
) < 0)
4752 *size
= atoi(token
);
4754 if (read_expected(EVENT_OP
, ";") < 0)
4756 type
= read_token(&token
);
4757 if (type
!= EVENT_NEWLINE
) {
4758 /* newer versions of the kernel have a "signed" type */
4759 if (type
!= EVENT_ITEM
)
4762 if (strcmp(token
, "signed") != 0)
4767 if (read_expected(EVENT_OP
, ":") < 0)
4770 if (read_expect_type(EVENT_ITEM
, &token
))
4774 if (read_expected(EVENT_OP
, ";") < 0)
4777 if (read_expect_type(EVENT_NEWLINE
, &token
))
4785 input_buf_ptr
= save_input_buf_ptr
;
4786 input_buf_siz
= save_input_buf_siz
;
4793 * pevent_parse_header_page - parse the data stored in the header page
4794 * @pevent: the handle to the pevent
4795 * @buf: the buffer storing the header page format string
4796 * @size: the size of @buf
4797 * @long_size: the long size to use if there is no header
4799 * This parses the header page format for information on the
4800 * ring buffer used. The @buf should be copied from
4802 * /sys/kernel/debug/tracing/events/header_page
4804 int pevent_parse_header_page(struct pevent
*pevent
, char *buf
, unsigned long size
,
4811 * Old kernels did not have header page info.
4812 * Sorry but we just use what we find here in user space.
4814 pevent
->header_page_ts_size
= sizeof(long long);
4815 pevent
->header_page_size_size
= long_size
;
4816 pevent
->header_page_data_offset
= sizeof(long long) + long_size
;
4817 pevent
->old_format
= 1;
4820 init_input_buf(buf
, size
);
4822 parse_header_field("timestamp", &pevent
->header_page_ts_offset
,
4823 &pevent
->header_page_ts_size
, 1);
4824 parse_header_field("commit", &pevent
->header_page_size_offset
,
4825 &pevent
->header_page_size_size
, 1);
4826 parse_header_field("overwrite", &pevent
->header_page_overwrite
,
4828 parse_header_field("data", &pevent
->header_page_data_offset
,
4829 &pevent
->header_page_data_size
, 1);
4834 static int event_matches(struct event_format
*event
,
4835 int id
, const char *sys_name
,
4836 const char *event_name
)
4838 if (id
>= 0 && id
!= event
->id
)
4841 if (event_name
&& (strcmp(event_name
, event
->name
) != 0))
4844 if (sys_name
&& (strcmp(sys_name
, event
->system
) != 0))
4850 static void free_handler(struct event_handler
*handle
)
4852 free((void *)handle
->sys_name
);
4853 free((void *)handle
->event_name
);
4857 static int find_event_handle(struct pevent
*pevent
, struct event_format
*event
)
4859 struct event_handler
*handle
, **next
;
4861 for (next
= &pevent
->handlers
; *next
;
4862 next
= &(*next
)->next
) {
4864 if (event_matches(event
, handle
->id
,
4866 handle
->event_name
))
4873 pr_stat("overriding event (%d) %s:%s with new print handler",
4874 event
->id
, event
->system
, event
->name
);
4876 event
->handler
= handle
->func
;
4877 event
->context
= handle
->context
;
4879 *next
= handle
->next
;
4880 free_handler(handle
);
4886 * __pevent_parse_format - parse the event format
4887 * @buf: the buffer storing the event format string
4888 * @size: the size of @buf
4889 * @sys: the system the event belongs to
4891 * This parses the event format and creates an event structure
4892 * to quickly parse raw data for a given event.
4894 * These files currently come from:
4896 * /sys/kernel/debug/tracing/events/.../.../format
4898 enum pevent_errno
__pevent_parse_format(struct event_format
**eventp
,
4899 struct pevent
*pevent
, const char *buf
,
4900 unsigned long size
, const char *sys
)
4902 struct event_format
*event
;
4905 init_input_buf(buf
, size
);
4907 *eventp
= event
= alloc_event();
4909 return PEVENT_ERRNO__MEM_ALLOC_FAILED
;
4911 event
->name
= event_read_name();
4914 ret
= PEVENT_ERRNO__MEM_ALLOC_FAILED
;
4915 goto event_alloc_failed
;
4918 if (strcmp(sys
, "ftrace") == 0) {
4919 event
->flags
|= EVENT_FL_ISFTRACE
;
4921 if (strcmp(event
->name
, "bprint") == 0)
4922 event
->flags
|= EVENT_FL_ISBPRINT
;
4925 event
->id
= event_read_id();
4926 if (event
->id
< 0) {
4927 ret
= PEVENT_ERRNO__READ_ID_FAILED
;
4929 * This isn't an allocation error actually.
4930 * But as the ID is critical, just bail out.
4932 goto event_alloc_failed
;
4935 event
->system
= strdup(sys
);
4936 if (!event
->system
) {
4937 ret
= PEVENT_ERRNO__MEM_ALLOC_FAILED
;
4938 goto event_alloc_failed
;
4941 ret
= event_read_format(event
);
4943 ret
= PEVENT_ERRNO__READ_FORMAT_FAILED
;
4944 goto event_parse_failed
;
4948 * If the event has an override, don't print warnings if the event
4949 * print format fails to parse.
4951 if (pevent
&& find_event_handle(pevent
, event
))
4954 ret
= event_read_print(event
);
4958 ret
= PEVENT_ERRNO__READ_PRINT_FAILED
;
4959 goto event_parse_failed
;
4962 if (!ret
&& (event
->flags
& EVENT_FL_ISFTRACE
)) {
4963 struct format_field
*field
;
4964 struct print_arg
*arg
, **list
;
4966 /* old ftrace had no args */
4967 list
= &event
->print_fmt
.args
;
4968 for (field
= event
->format
.fields
; field
; field
= field
->next
) {
4971 event
->flags
|= EVENT_FL_FAILED
;
4972 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED
;
4974 arg
->type
= PRINT_FIELD
;
4975 arg
->field
.name
= strdup(field
->name
);
4976 if (!arg
->field
.name
) {
4977 event
->flags
|= EVENT_FL_FAILED
;
4979 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED
;
4981 arg
->field
.field
= field
;
4991 event
->flags
|= EVENT_FL_FAILED
;
4995 free(event
->system
);
5003 * pevent_parse_format - parse the event format
5004 * @buf: the buffer storing the event format string
5005 * @size: the size of @buf
5006 * @sys: the system the event belongs to
5008 * This parses the event format and creates an event structure
5009 * to quickly parse raw data for a given event.
5011 * These files currently come from:
5013 * /sys/kernel/debug/tracing/events/.../.../format
5015 enum pevent_errno
pevent_parse_format(struct event_format
**eventp
, const char *buf
,
5016 unsigned long size
, const char *sys
)
5018 return __pevent_parse_format(eventp
, NULL
, buf
, size
, sys
);
5022 * pevent_parse_event - parse the event format
5023 * @pevent: the handle to the pevent
5024 * @buf: the buffer storing the event format string
5025 * @size: the size of @buf
5026 * @sys: the system the event belongs to
5028 * This parses the event format and creates an event structure
5029 * to quickly parse raw data for a given event.
5031 * These files currently come from:
5033 * /sys/kernel/debug/tracing/events/.../.../format
5035 enum pevent_errno
pevent_parse_event(struct pevent
*pevent
, const char *buf
,
5036 unsigned long size
, const char *sys
)
5038 struct event_format
*event
= NULL
;
5039 int ret
= __pevent_parse_format(&event
, pevent
, buf
, size
, sys
);
5044 /* Add pevent to event so that it can be referenced */
5045 event
->pevent
= pevent
;
5047 if (add_event(pevent
, event
)) {
5048 ret
= PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5049 goto event_add_failed
;
5052 #define PRINT_ARGS 0
5053 if (PRINT_ARGS
&& event
->print_fmt
.args
)
5054 print_args(event
->print_fmt
.args
);
5059 pevent_free_format(event
);
5064 #define _PE(code, str) str
5065 static const char * const pevent_error_str
[] = {
5070 int pevent_strerror(struct pevent
*pevent
, enum pevent_errno errnum
,
5071 char *buf
, size_t buflen
)
5077 msg
= strerror_r(errnum
, buf
, buflen
);
5079 size_t len
= strlen(msg
);
5080 memcpy(buf
, msg
, min(buflen
- 1, len
));
5081 *(buf
+ min(buflen
- 1, len
)) = '\0';
5086 if (errnum
<= __PEVENT_ERRNO__START
||
5087 errnum
>= __PEVENT_ERRNO__END
)
5090 idx
= errnum
- __PEVENT_ERRNO__START
- 1;
5091 msg
= pevent_error_str
[idx
];
5094 case PEVENT_ERRNO__MEM_ALLOC_FAILED
:
5095 case PEVENT_ERRNO__PARSE_EVENT_FAILED
:
5096 case PEVENT_ERRNO__READ_ID_FAILED
:
5097 case PEVENT_ERRNO__READ_FORMAT_FAILED
:
5098 case PEVENT_ERRNO__READ_PRINT_FAILED
:
5099 case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED
:
5100 snprintf(buf
, buflen
, "%s", msg
);
5104 /* cannot reach here */
5111 int get_field_val(struct trace_seq
*s
, struct format_field
*field
,
5112 const char *name
, struct pevent_record
*record
,
5113 unsigned long long *val
, int err
)
5117 trace_seq_printf(s
, "<CANT FIND FIELD %s>", name
);
5121 if (pevent_read_number_field(field
, record
->data
, val
)) {
5123 trace_seq_printf(s
, " %s=INVALID", name
);
5131 * pevent_get_field_raw - return the raw pointer into the data field
5132 * @s: The seq to print to on error
5133 * @event: the event that the field is for
5134 * @name: The name of the field
5135 * @record: The record with the field name.
5136 * @len: place to store the field length.
5137 * @err: print default error if failed.
5139 * Returns a pointer into record->data of the field and places
5140 * the length of the field in @len.
5142 * On failure, it returns NULL.
5144 void *pevent_get_field_raw(struct trace_seq
*s
, struct event_format
*event
,
5145 const char *name
, struct pevent_record
*record
,
5148 struct format_field
*field
;
5149 void *data
= record
->data
;
5156 field
= pevent_find_field(event
, name
);
5160 trace_seq_printf(s
, "<CANT FIND FIELD %s>", name
);
5164 /* Allow @len to be NULL */
5168 offset
= field
->offset
;
5169 if (field
->flags
& FIELD_IS_DYNAMIC
) {
5170 offset
= pevent_read_number(event
->pevent
,
5171 data
+ offset
, field
->size
);
5172 *len
= offset
>> 16;
5177 return data
+ offset
;
5181 * pevent_get_field_val - find a field and return its value
5182 * @s: The seq to print to on error
5183 * @event: the event that the field is for
5184 * @name: The name of the field
5185 * @record: The record with the field name.
5186 * @val: place to store the value of the field.
5187 * @err: print default error if failed.
5189 * Returns 0 on success -1 on field not found.
5191 int pevent_get_field_val(struct trace_seq
*s
, struct event_format
*event
,
5192 const char *name
, struct pevent_record
*record
,
5193 unsigned long long *val
, int err
)
5195 struct format_field
*field
;
5200 field
= pevent_find_field(event
, name
);
5202 return get_field_val(s
, field
, name
, record
, val
, err
);
5206 * pevent_get_common_field_val - find a common field and return its value
5207 * @s: The seq to print to on error
5208 * @event: the event that the field is for
5209 * @name: The name of the field
5210 * @record: The record with the field name.
5211 * @val: place to store the value of the field.
5212 * @err: print default error if failed.
5214 * Returns 0 on success -1 on field not found.
5216 int pevent_get_common_field_val(struct trace_seq
*s
, struct event_format
*event
,
5217 const char *name
, struct pevent_record
*record
,
5218 unsigned long long *val
, int err
)
5220 struct format_field
*field
;
5225 field
= pevent_find_common_field(event
, name
);
5227 return get_field_val(s
, field
, name
, record
, val
, err
);
5231 * pevent_get_any_field_val - find a any field and return its value
5232 * @s: The seq to print to on error
5233 * @event: the event that the field is for
5234 * @name: The name of the field
5235 * @record: The record with the field name.
5236 * @val: place to store the value of the field.
5237 * @err: print default error if failed.
5239 * Returns 0 on success -1 on field not found.
5241 int pevent_get_any_field_val(struct trace_seq
*s
, struct event_format
*event
,
5242 const char *name
, struct pevent_record
*record
,
5243 unsigned long long *val
, int err
)
5245 struct format_field
*field
;
5250 field
= pevent_find_any_field(event
, name
);
5252 return get_field_val(s
, field
, name
, record
, val
, err
);
5256 * pevent_print_num_field - print a field and a format
5257 * @s: The seq to print to
5258 * @fmt: The printf format to print the field with.
5259 * @event: the event that the field is for
5260 * @name: The name of the field
5261 * @record: The record with the field name.
5262 * @err: print default error if failed.
5264 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
5266 int pevent_print_num_field(struct trace_seq
*s
, const char *fmt
,
5267 struct event_format
*event
, const char *name
,
5268 struct pevent_record
*record
, int err
)
5270 struct format_field
*field
= pevent_find_field(event
, name
);
5271 unsigned long long val
;
5276 if (pevent_read_number_field(field
, record
->data
, &val
))
5279 return trace_seq_printf(s
, fmt
, val
);
5283 trace_seq_printf(s
, "CAN'T FIND FIELD \"%s\"", name
);
5287 static void free_func_handle(struct pevent_function_handler
*func
)
5289 struct pevent_func_params
*params
;
5293 while (func
->params
) {
5294 params
= func
->params
;
5295 func
->params
= params
->next
;
5303 * pevent_register_print_function - register a helper function
5304 * @pevent: the handle to the pevent
5305 * @func: the function to process the helper function
5306 * @ret_type: the return type of the helper function
5307 * @name: the name of the helper function
5308 * @parameters: A list of enum pevent_func_arg_type
5310 * Some events may have helper functions in the print format arguments.
5311 * This allows a plugin to dynamically create a way to process one
5312 * of these functions.
5314 * The @parameters is a variable list of pevent_func_arg_type enums that
5315 * must end with PEVENT_FUNC_ARG_VOID.
5317 int pevent_register_print_function(struct pevent
*pevent
,
5318 pevent_func_handler func
,
5319 enum pevent_func_arg_type ret_type
,
5322 struct pevent_function_handler
*func_handle
;
5323 struct pevent_func_params
**next_param
;
5324 struct pevent_func_params
*param
;
5325 enum pevent_func_arg_type type
;
5329 func_handle
= find_func_handler(pevent
, name
);
5332 * This is most like caused by the users own
5333 * plugins updating the function. This overrides the
5336 pr_stat("override of function helper '%s'", name
);
5337 remove_func_handler(pevent
, name
);
5340 func_handle
= calloc(1, sizeof(*func_handle
));
5342 do_warning("Failed to allocate function handler");
5343 return PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5346 func_handle
->ret_type
= ret_type
;
5347 func_handle
->name
= strdup(name
);
5348 func_handle
->func
= func
;
5349 if (!func_handle
->name
) {
5350 do_warning("Failed to allocate function name");
5352 return PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5355 next_param
= &(func_handle
->params
);
5358 type
= va_arg(ap
, enum pevent_func_arg_type
);
5359 if (type
== PEVENT_FUNC_ARG_VOID
)
5362 if (type
< 0 || type
>= PEVENT_FUNC_ARG_MAX_TYPES
) {
5363 do_warning("Invalid argument type %d", type
);
5364 ret
= PEVENT_ERRNO__INVALID_ARG_TYPE
;
5368 param
= malloc(sizeof(*param
));
5370 do_warning("Failed to allocate function param");
5371 ret
= PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5377 *next_param
= param
;
5378 next_param
= &(param
->next
);
5380 func_handle
->nr_args
++;
5384 func_handle
->next
= pevent
->func_handlers
;
5385 pevent
->func_handlers
= func_handle
;
5390 free_func_handle(func_handle
);
5395 * pevent_register_event_handler - register a way to parse an event
5396 * @pevent: the handle to the pevent
5397 * @id: the id of the event to register
5398 * @sys_name: the system name the event belongs to
5399 * @event_name: the name of the event
5400 * @func: the function to call to parse the event information
5401 * @context: the data to be passed to @func
5403 * This function allows a developer to override the parsing of
5404 * a given event. If for some reason the default print format
5405 * is not sufficient, this function will register a function
5406 * for an event to be used to parse the data instead.
5408 * If @id is >= 0, then it is used to find the event.
5409 * else @sys_name and @event_name are used.
5411 int pevent_register_event_handler(struct pevent
*pevent
,
5412 int id
, char *sys_name
, char *event_name
,
5413 pevent_event_handler_func func
,
5416 struct event_format
*event
;
5417 struct event_handler
*handle
;
5421 event
= pevent_find_event(pevent
, id
);
5424 if (event_name
&& (strcmp(event_name
, event
->name
) != 0))
5426 if (sys_name
&& (strcmp(sys_name
, event
->system
) != 0))
5429 event
= pevent_find_event_by_name(pevent
, sys_name
, event_name
);
5434 pr_stat("overriding event (%d) %s:%s with new print handler",
5435 event
->id
, event
->system
, event
->name
);
5437 event
->handler
= func
;
5438 event
->context
= context
;
5442 /* Save for later use. */
5443 handle
= calloc(1, sizeof(*handle
));
5445 do_warning("Failed to allocate event handler");
5446 return PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5451 handle
->event_name
= strdup(event_name
);
5453 handle
->sys_name
= strdup(sys_name
);
5455 if ((event_name
&& !handle
->event_name
) ||
5456 (sys_name
&& !handle
->sys_name
)) {
5457 do_warning("Failed to allocate event/sys name");
5458 free((void *)handle
->event_name
);
5459 free((void *)handle
->sys_name
);
5461 return PEVENT_ERRNO__MEM_ALLOC_FAILED
;
5464 handle
->func
= func
;
5465 handle
->next
= pevent
->handlers
;
5466 pevent
->handlers
= handle
;
5467 handle
->context
= context
;
5473 * pevent_alloc - create a pevent handle
5475 struct pevent
*pevent_alloc(void)
5477 struct pevent
*pevent
= calloc(1, sizeof(*pevent
));
5480 pevent
->ref_count
= 1;
5485 void pevent_ref(struct pevent
*pevent
)
5487 pevent
->ref_count
++;
5490 static void free_format_fields(struct format_field
*field
)
5492 struct format_field
*next
;
5503 static void free_formats(struct format
*format
)
5505 free_format_fields(format
->common_fields
);
5506 free_format_fields(format
->fields
);
5509 void pevent_free_format(struct event_format
*event
)
5512 free(event
->system
);
5514 free_formats(&event
->format
);
5516 free(event
->print_fmt
.format
);
5517 free_args(event
->print_fmt
.args
);
5523 * pevent_free - free a pevent handle
5524 * @pevent: the pevent handle to free
5526 void pevent_free(struct pevent
*pevent
)
5528 struct cmdline_list
*cmdlist
, *cmdnext
;
5529 struct func_list
*funclist
, *funcnext
;
5530 struct printk_list
*printklist
, *printknext
;
5531 struct pevent_function_handler
*func_handler
;
5532 struct event_handler
*handle
;
5538 cmdlist
= pevent
->cmdlist
;
5539 funclist
= pevent
->funclist
;
5540 printklist
= pevent
->printklist
;
5542 pevent
->ref_count
--;
5543 if (pevent
->ref_count
)
5546 if (pevent
->cmdlines
) {
5547 for (i
= 0; i
< pevent
->cmdline_count
; i
++)
5548 free(pevent
->cmdlines
[i
].comm
);
5549 free(pevent
->cmdlines
);
5553 cmdnext
= cmdlist
->next
;
5554 free(cmdlist
->comm
);
5559 if (pevent
->func_map
) {
5560 for (i
= 0; i
< pevent
->func_count
; i
++) {
5561 free(pevent
->func_map
[i
].func
);
5562 free(pevent
->func_map
[i
].mod
);
5564 free(pevent
->func_map
);
5568 funcnext
= funclist
->next
;
5569 free(funclist
->func
);
5570 free(funclist
->mod
);
5572 funclist
= funcnext
;
5575 while (pevent
->func_handlers
) {
5576 func_handler
= pevent
->func_handlers
;
5577 pevent
->func_handlers
= func_handler
->next
;
5578 free_func_handle(func_handler
);
5581 if (pevent
->printk_map
) {
5582 for (i
= 0; i
< pevent
->printk_count
; i
++)
5583 free(pevent
->printk_map
[i
].printk
);
5584 free(pevent
->printk_map
);
5587 while (printklist
) {
5588 printknext
= printklist
->next
;
5589 free(printklist
->printk
);
5591 printklist
= printknext
;
5594 for (i
= 0; i
< pevent
->nr_events
; i
++)
5595 pevent_free_format(pevent
->events
[i
]);
5597 while (pevent
->handlers
) {
5598 handle
= pevent
->handlers
;
5599 pevent
->handlers
= handle
->next
;
5600 free_handler(handle
);
5603 free(pevent
->events
);
5604 free(pevent
->sort_events
);
5609 void pevent_unref(struct pevent
*pevent
)
5611 pevent_free(pevent
);