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 struct print_arg *arg;
123 arg = malloc_or_die(sizeof(*arg));
126 memset(arg, 0, sizeof(*arg));
136 static int cmdline_cmp(const void *a, const void *b)
138 const struct cmdline *ca = a;
139 const struct cmdline *cb = b;
141 if (ca->pid < cb->pid)
143 if (ca->pid > cb->pid)
149 struct cmdline_list {
150 struct cmdline_list *next;
155 static int cmdline_init(struct pevent *pevent)
157 struct cmdline_list *cmdlist = pevent->cmdlist;
158 struct cmdline_list *item;
159 struct cmdline *cmdlines;
162 cmdlines = malloc_or_die(sizeof(*cmdlines) * pevent->cmdline_count);
166 cmdlines[i].pid = cmdlist->pid;
167 cmdlines[i].comm = cmdlist->comm;
170 cmdlist = cmdlist->next;
174 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
176 pevent->cmdlines = cmdlines;
177 pevent->cmdlist = NULL;
182 static char *find_cmdline(struct pevent *pevent, int pid)
184 const struct cmdline *comm;
190 if (!pevent->cmdlines)
191 cmdline_init(pevent);
195 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
196 sizeof(*pevent->cmdlines), cmdline_cmp);
204 * pevent_pid_is_registered - return if a pid has a cmdline registered
205 * @pevent: handle for the pevent
206 * @pid: The pid to check if it has a cmdline registered with.
208 * Returns 1 if the pid has a cmdline mapped to it
211 int pevent_pid_is_registered(struct pevent *pevent, int pid)
213 const struct cmdline *comm;
219 if (!pevent->cmdlines)
220 cmdline_init(pevent);
224 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
225 sizeof(*pevent->cmdlines), cmdline_cmp);
233 * If the command lines have been converted to an array, then
234 * we must add this pid. This is much slower than when cmdlines
235 * are added before the array is initialized.
237 static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
239 struct cmdline *cmdlines = pevent->cmdlines;
240 const struct cmdline *cmdline;
246 /* avoid duplicates */
249 cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
250 sizeof(*pevent->cmdlines), cmdline_cmp);
256 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
262 cmdlines[pevent->cmdline_count].pid = pid;
263 cmdlines[pevent->cmdline_count].comm = strdup(comm);
264 if (!cmdlines[pevent->cmdline_count].comm)
267 if (cmdlines[pevent->cmdline_count].comm)
268 pevent->cmdline_count++;
270 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
271 pevent->cmdlines = cmdlines;
277 * pevent_register_comm - register a pid / comm mapping
278 * @pevent: handle for the pevent
279 * @comm: the command line to register
280 * @pid: the pid to map the command line to
282 * This adds a mapping to search for command line names with
283 * a given pid. The comm is duplicated.
285 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
287 struct cmdline_list *item;
289 if (pevent->cmdlines)
290 return add_new_comm(pevent, comm, pid);
292 item = malloc_or_die(sizeof(*item));
293 item->comm = strdup(comm);
297 item->next = pevent->cmdlist;
299 pevent->cmdlist = item;
300 pevent->cmdline_count++;
306 unsigned long long addr;
312 struct func_list *next;
313 unsigned long long addr;
318 static int func_cmp(const void *a, const void *b)
320 const struct func_map *fa = a;
321 const struct func_map *fb = b;
323 if (fa->addr < fb->addr)
325 if (fa->addr > fb->addr)
332 * We are searching for a record in between, not an exact
335 static int func_bcmp(const void *a, const void *b)
337 const struct func_map *fa = a;
338 const struct func_map *fb = b;
340 if ((fa->addr == fb->addr) ||
342 (fa->addr > fb->addr &&
343 fa->addr < (fb+1)->addr))
346 if (fa->addr < fb->addr)
352 static int func_map_init(struct pevent *pevent)
354 struct func_list *funclist;
355 struct func_list *item;
356 struct func_map *func_map;
359 func_map = malloc_or_die(sizeof(*func_map) * (pevent->func_count + 1));
360 funclist = pevent->funclist;
364 func_map[i].func = funclist->func;
365 func_map[i].addr = funclist->addr;
366 func_map[i].mod = funclist->mod;
369 funclist = funclist->next;
373 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
376 * Add a special record at the end.
378 func_map[pevent->func_count].func = NULL;
379 func_map[pevent->func_count].addr = 0;
380 func_map[pevent->func_count].mod = NULL;
382 pevent->func_map = func_map;
383 pevent->funclist = NULL;
388 static struct func_map *
389 find_func(struct pevent *pevent, unsigned long long addr)
391 struct func_map *func;
394 if (!pevent->func_map)
395 func_map_init(pevent);
399 func = bsearch(&key, pevent->func_map, pevent->func_count,
400 sizeof(*pevent->func_map), func_bcmp);
406 * pevent_find_function - find a function by a given address
407 * @pevent: handle for the pevent
408 * @addr: the address to find the function with
410 * Returns a pointer to the function stored that has the given
411 * address. Note, the address does not have to be exact, it
412 * will select the function that would contain the address.
414 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
416 struct func_map *map;
418 map = find_func(pevent, addr);
426 * pevent_find_function_address - find a function address by a given address
427 * @pevent: handle for the pevent
428 * @addr: the address to find the function with
430 * Returns the address the function starts at. This can be used in
431 * conjunction with pevent_find_function to print both the function
432 * name and the function offset.
435 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
437 struct func_map *map;
439 map = find_func(pevent, addr);
447 * pevent_register_function - register a function with a given address
448 * @pevent: handle for the pevent
449 * @function: the function name to register
450 * @addr: the address the function starts at
451 * @mod: the kernel module the function may be in (NULL for none)
453 * This registers a function name with an address and module.
454 * The @func passed in is duplicated.
456 int pevent_register_function(struct pevent *pevent, char *func,
457 unsigned long long addr, char *mod)
459 struct func_list *item;
461 item = malloc_or_die(sizeof(*item));
463 item->next = pevent->funclist;
464 item->func = strdup(func);
466 item->mod = strdup(mod);
471 if (!item->func || (mod && !item->mod))
474 pevent->funclist = item;
475 pevent->func_count++;
481 * pevent_print_funcs - print out the stored functions
482 * @pevent: handle for the pevent
484 * This prints out the stored functions.
486 void pevent_print_funcs(struct pevent *pevent)
490 if (!pevent->func_map)
491 func_map_init(pevent);
493 for (i = 0; i < (int)pevent->func_count; i++) {
495 pevent->func_map[i].addr,
496 pevent->func_map[i].func);
497 if (pevent->func_map[i].mod)
498 printf(" [%s]\n", pevent->func_map[i].mod);
505 unsigned long long addr;
510 struct printk_list *next;
511 unsigned long long addr;
515 static int printk_cmp(const void *a, const void *b)
517 const struct printk_map *pa = a;
518 const struct printk_map *pb = b;
520 if (pa->addr < pb->addr)
522 if (pa->addr > pb->addr)
528 static void printk_map_init(struct pevent *pevent)
530 struct printk_list *printklist;
531 struct printk_list *item;
532 struct printk_map *printk_map;
535 printk_map = malloc_or_die(sizeof(*printk_map) * (pevent->printk_count + 1));
537 printklist = pevent->printklist;
541 printk_map[i].printk = printklist->printk;
542 printk_map[i].addr = printklist->addr;
545 printklist = printklist->next;
549 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
551 pevent->printk_map = printk_map;
552 pevent->printklist = NULL;
555 static struct printk_map *
556 find_printk(struct pevent *pevent, unsigned long long addr)
558 struct printk_map *printk;
559 struct printk_map key;
561 if (!pevent->printk_map)
562 printk_map_init(pevent);
566 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
567 sizeof(*pevent->printk_map), printk_cmp);
573 * pevent_register_print_string - register a string by its address
574 * @pevent: handle for the pevent
575 * @fmt: the string format to register
576 * @addr: the address the string was located at
578 * This registers a string by the address it was stored in the kernel.
579 * The @fmt passed in is duplicated.
581 int pevent_register_print_string(struct pevent *pevent, char *fmt,
582 unsigned long long addr)
584 struct printk_list *item;
586 item = malloc_or_die(sizeof(*item));
588 item->next = pevent->printklist;
589 item->printk = strdup(fmt);
595 pevent->printklist = item;
596 pevent->printk_count++;
602 * pevent_print_printk - print out the stored strings
603 * @pevent: handle for the pevent
605 * This prints the string formats that were stored.
607 void pevent_print_printk(struct pevent *pevent)
611 if (!pevent->printk_map)
612 printk_map_init(pevent);
614 for (i = 0; i < (int)pevent->printk_count; i++) {
615 printf("%016llx %s\n",
616 pevent->printk_map[i].addr,
617 pevent->printk_map[i].printk);
621 static struct event_format *alloc_event(void)
623 struct event_format *event;
625 event = malloc(sizeof(*event));
628 memset(event, 0, sizeof(*event));
633 static void add_event(struct pevent *pevent, struct event_format *event)
637 pevent->events = realloc(pevent->events, sizeof(event) *
638 (pevent->nr_events + 1));
640 die("Can not allocate events");
642 for (i = 0; i < pevent->nr_events; i++) {
643 if (pevent->events[i]->id > event->id)
646 if (i < pevent->nr_events)
647 memmove(&pevent->events[i + 1],
649 sizeof(event) * (pevent->nr_events - i));
651 pevent->events[i] = event;
654 event->pevent = pevent;
657 static int event_item_type(enum event_type type)
660 case EVENT_ITEM ... EVENT_SQUOTE:
662 case EVENT_ERROR ... EVENT_DELIM:
668 static void free_flag_sym(struct print_flag_sym *fsym)
670 struct print_flag_sym *next;
681 static void free_arg(struct print_arg *arg)
683 struct print_arg *farg;
690 free(arg->atom.atom);
693 free(arg->field.name);
696 free_arg(arg->flags.field);
697 free(arg->flags.delim);
698 free_flag_sym(arg->flags.flags);
701 free_arg(arg->symbol.field);
702 free_flag_sym(arg->symbol.symbols);
705 free_arg(arg->hex.field);
706 free_arg(arg->hex.size);
709 free(arg->typecast.type);
710 free_arg(arg->typecast.item);
714 free(arg->string.string);
716 case PRINT_DYNAMIC_ARRAY:
717 free(arg->dynarray.index);
721 free_arg(arg->op.left);
722 free_arg(arg->op.right);
725 while (arg->func.args) {
726 farg = arg->func.args;
727 arg->func.args = farg->next;
740 static enum event_type get_type(int ch)
743 return EVENT_NEWLINE;
746 if (isalnum(ch) || ch == '_')
754 if (ch == '(' || ch == ')' || ch == ',')
760 static int __read_char(void)
762 if (input_buf_ptr >= input_buf_siz)
765 return input_buf[input_buf_ptr++];
768 static int __peek_char(void)
770 if (input_buf_ptr >= input_buf_siz)
773 return input_buf[input_buf_ptr];
777 * pevent_peek_char - peek at the next character that will be read
779 * Returns the next character read, or -1 if end of buffer.
781 int pevent_peek_char(void)
783 return __peek_char();
786 static int extend_token(char **tok, char *buf, int size)
788 char *newtok = realloc(*tok, size);
805 static enum event_type force_token(const char *str, char **tok);
807 static enum event_type __read_token(char **tok)
810 int ch, last_ch, quote_ch, next_ch;
813 enum event_type type;
823 if (type == EVENT_NONE)
831 *tok = malloc_or_die(2);
839 next_ch = __peek_char();
840 if (next_ch == '>') {
841 buf[i++] = __read_char();
854 buf[i++] = __read_char();
866 default: /* what should we do instead? */
876 buf[i++] = __read_char();
881 /* don't keep quotes */
887 if (i == (BUFSIZ - 1)) {
891 if (extend_token(tok, buf, tok_size) < 0)
898 /* the '\' '\' will cancel itself */
899 if (ch == '\\' && last_ch == '\\')
901 } while (ch != quote_ch || last_ch == '\\');
902 /* remove the last quote */
906 * For strings (double quotes) check the next token.
907 * If it is another string, concatinate the two.
909 if (type == EVENT_DQUOTE) {
910 unsigned long long save_input_buf_ptr = input_buf_ptr;
914 } while (isspace(ch));
917 input_buf_ptr = save_input_buf_ptr;
922 case EVENT_ERROR ... EVENT_SPACE:
928 while (get_type(__peek_char()) == type) {
929 if (i == (BUFSIZ - 1)) {
933 if (extend_token(tok, buf, tok_size) < 0)
943 if (extend_token(tok, buf, tok_size + i + 1) < 0)
946 if (type == EVENT_ITEM) {
948 * Older versions of the kernel has a bug that
949 * creates invalid symbols and will break the mac80211
950 * parsing. This is a work around to that bug.
952 * See Linux kernel commit:
953 * 811cb50baf63461ce0bdb234927046131fc7fa8b
955 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
958 return force_token("\"\%s\" ", tok);
959 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
962 return force_token("\" sta:%pM\" ", tok);
963 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
966 return force_token("\" vif:%p(%d)\" ", tok);
973 static enum event_type force_token(const char *str, char **tok)
975 const char *save_input_buf;
976 unsigned long long save_input_buf_ptr;
977 unsigned long long save_input_buf_siz;
978 enum event_type type;
980 /* save off the current input pointers */
981 save_input_buf = input_buf;
982 save_input_buf_ptr = input_buf_ptr;
983 save_input_buf_siz = input_buf_siz;
985 init_input_buf(str, strlen(str));
987 type = __read_token(tok);
989 /* reset back to original token */
990 input_buf = save_input_buf;
991 input_buf_ptr = save_input_buf_ptr;
992 input_buf_siz = save_input_buf_siz;
997 static void free_token(char *tok)
1003 static enum event_type read_token(char **tok)
1005 enum event_type type;
1008 type = __read_token(tok);
1009 if (type != EVENT_SPACE)
1021 * pevent_read_token - access to utilites to use the pevent parser
1022 * @tok: The token to return
1024 * This will parse tokens from the string given by
1025 * pevent_init_data().
1027 * Returns the token type.
1029 enum event_type pevent_read_token(char **tok)
1031 return read_token(tok);
1035 * pevent_free_token - free a token returned by pevent_read_token
1036 * @token: the token to free
1038 void pevent_free_token(char *token)
1044 static enum event_type read_token_item(char **tok)
1046 enum event_type type;
1049 type = __read_token(tok);
1050 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1061 static int test_type(enum event_type type, enum event_type expect)
1063 if (type != expect) {
1064 do_warning("Error: expected type %d but read %d",
1071 static int test_type_token(enum event_type type, const char *token,
1072 enum event_type expect, const char *expect_tok)
1074 if (type != expect) {
1075 do_warning("Error: expected type %d but read %d",
1080 if (strcmp(token, expect_tok) != 0) {
1081 do_warning("Error: expected '%s' but read '%s'",
1088 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1090 enum event_type type;
1093 type = read_token(tok);
1095 type = read_token_item(tok);
1096 return test_type(type, expect);
1099 static int read_expect_type(enum event_type expect, char **tok)
1101 return __read_expect_type(expect, tok, 1);
1104 static int __read_expected(enum event_type expect, const char *str,
1107 enum event_type type;
1112 type = read_token(&token);
1114 type = read_token_item(&token);
1116 ret = test_type_token(type, token, expect, str);
1123 static int read_expected(enum event_type expect, const char *str)
1125 return __read_expected(expect, str, 1);
1128 static int read_expected_item(enum event_type expect, const char *str)
1130 return __read_expected(expect, str, 0);
1133 static char *event_read_name(void)
1137 if (read_expected(EVENT_ITEM, "name") < 0)
1140 if (read_expected(EVENT_OP, ":") < 0)
1143 if (read_expect_type(EVENT_ITEM, &token) < 0)
1153 static int event_read_id(void)
1158 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1161 if (read_expected(EVENT_OP, ":") < 0)
1164 if (read_expect_type(EVENT_ITEM, &token) < 0)
1167 id = strtoul(token, NULL, 0);
1176 static int field_is_string(struct format_field *field)
1178 if ((field->flags & FIELD_IS_ARRAY) &&
1179 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1180 strstr(field->type, "s8")))
1186 static int field_is_dynamic(struct format_field *field)
1188 if (strncmp(field->type, "__data_loc", 10) == 0)
1194 static int field_is_long(struct format_field *field)
1196 /* includes long long */
1197 if (strstr(field->type, "long"))
1203 static int event_read_fields(struct event_format *event, struct format_field **fields)
1205 struct format_field *field = NULL;
1206 enum event_type type;
1212 type = read_token(&token);
1213 if (type == EVENT_NEWLINE) {
1220 if (test_type_token(type, token, EVENT_ITEM, "field"))
1224 type = read_token(&token);
1226 * The ftrace fields may still use the "special" name.
1229 if (event->flags & EVENT_FL_ISFTRACE &&
1230 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1232 type = read_token(&token);
1235 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1239 if (read_expect_type(EVENT_ITEM, &token) < 0)
1244 field = malloc_or_die(sizeof(*field));
1245 memset(field, 0, sizeof(*field));
1246 field->event = event;
1248 /* read the rest of the type */
1250 type = read_token(&token);
1251 if (type == EVENT_ITEM ||
1252 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1254 * Some of the ftrace fields are broken and have
1255 * an illegal "." in them.
1257 (event->flags & EVENT_FL_ISFTRACE &&
1258 type == EVENT_OP && strcmp(token, ".") == 0)) {
1260 if (strcmp(token, "*") == 0)
1261 field->flags |= FIELD_IS_POINTER;
1265 new_type = realloc(field->type,
1266 strlen(field->type) +
1267 strlen(last_token) + 2);
1272 field->type = new_type;
1273 strcat(field->type, " ");
1274 strcat(field->type, last_token);
1277 field->type = last_token;
1286 die("no type found");
1289 field->name = last_token;
1291 if (test_type(type, EVENT_OP))
1294 if (strcmp(token, "[") == 0) {
1295 enum event_type last_type = type;
1296 char *brackets = token;
1300 field->flags |= FIELD_IS_ARRAY;
1302 type = read_token(&token);
1304 if (type == EVENT_ITEM)
1305 field->arraylen = strtoul(token, NULL, 0);
1307 field->arraylen = 0;
1309 while (strcmp(token, "]") != 0) {
1310 if (last_type == EVENT_ITEM &&
1317 new_brackets = realloc(brackets,
1319 strlen(token) + len);
1320 if (!new_brackets) {
1324 brackets = new_brackets;
1326 strcat(brackets, " ");
1327 strcat(brackets, token);
1328 /* We only care about the last token */
1329 field->arraylen = strtoul(token, NULL, 0);
1331 type = read_token(&token);
1332 if (type == EVENT_NONE) {
1333 die("failed to find token");
1340 new_brackets = realloc(brackets, strlen(brackets) + 2);
1341 if (!new_brackets) {
1345 brackets = new_brackets;
1346 strcat(brackets, "]");
1348 /* add brackets to type */
1350 type = read_token(&token);
1352 * If the next token is not an OP, then it is of
1353 * the format: type [] item;
1355 if (type == EVENT_ITEM) {
1357 new_type = realloc(field->type,
1358 strlen(field->type) +
1359 strlen(field->name) +
1360 strlen(brackets) + 2);
1365 field->type = new_type;
1366 strcat(field->type, " ");
1367 strcat(field->type, field->name);
1368 free_token(field->name);
1369 strcat(field->type, brackets);
1370 field->name = token;
1371 type = read_token(&token);
1374 new_type = realloc(field->type,
1375 strlen(field->type) +
1376 strlen(brackets) + 1);
1381 field->type = new_type;
1382 strcat(field->type, brackets);
1387 if (field_is_string(field))
1388 field->flags |= FIELD_IS_STRING;
1389 if (field_is_dynamic(field))
1390 field->flags |= FIELD_IS_DYNAMIC;
1391 if (field_is_long(field))
1392 field->flags |= FIELD_IS_LONG;
1394 if (test_type_token(type, token, EVENT_OP, ";"))
1398 if (read_expected(EVENT_ITEM, "offset") < 0)
1401 if (read_expected(EVENT_OP, ":") < 0)
1404 if (read_expect_type(EVENT_ITEM, &token))
1406 field->offset = strtoul(token, NULL, 0);
1409 if (read_expected(EVENT_OP, ";") < 0)
1412 if (read_expected(EVENT_ITEM, "size") < 0)
1415 if (read_expected(EVENT_OP, ":") < 0)
1418 if (read_expect_type(EVENT_ITEM, &token))
1420 field->size = strtoul(token, NULL, 0);
1423 if (read_expected(EVENT_OP, ";") < 0)
1426 type = read_token(&token);
1427 if (type != EVENT_NEWLINE) {
1428 /* newer versions of the kernel have a "signed" type */
1429 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1434 if (read_expected(EVENT_OP, ":") < 0)
1437 if (read_expect_type(EVENT_ITEM, &token))
1440 /* add signed type */
1443 if (read_expected(EVENT_OP, ";") < 0)
1446 if (read_expect_type(EVENT_NEWLINE, &token))
1452 if (field->flags & FIELD_IS_ARRAY) {
1453 if (field->arraylen)
1454 field->elementsize = field->size / field->arraylen;
1455 else if (field->flags & FIELD_IS_STRING)
1456 field->elementsize = 1;
1458 field->elementsize = event->pevent->long_size;
1460 field->elementsize = field->size;
1463 fields = &field->next;
1480 static int event_read_format(struct event_format *event)
1485 if (read_expected_item(EVENT_ITEM, "format") < 0)
1488 if (read_expected(EVENT_OP, ":") < 0)
1491 if (read_expect_type(EVENT_NEWLINE, &token))
1495 ret = event_read_fields(event, &event->format.common_fields);
1498 event->format.nr_common = ret;
1500 ret = event_read_fields(event, &event->format.fields);
1503 event->format.nr_fields = ret;
1512 static enum event_type
1513 process_arg_token(struct event_format *event, struct print_arg *arg,
1514 char **tok, enum event_type type);
1516 static enum event_type
1517 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1519 enum event_type type;
1522 type = read_token(&token);
1525 return process_arg_token(event, arg, tok, type);
1528 static enum event_type
1529 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1531 static enum event_type
1532 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1534 struct print_arg *arg, *left, *right;
1535 enum event_type type;
1540 right = alloc_arg();
1542 arg->type = PRINT_OP;
1543 arg->op.left = left;
1544 arg->op.right = right;
1547 type = process_arg(event, left, &token);
1550 /* Handle other operations in the arguments */
1551 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1552 type = process_op(event, left, &token);
1556 if (test_type_token(type, token, EVENT_OP, ":"))
1561 type = process_arg(event, right, &token);
1563 top->op.right = arg;
1569 /* Top may point to itself */
1570 top->op.right = NULL;
1576 static enum event_type
1577 process_array(struct event_format *event, struct print_arg *top, char **tok)
1579 struct print_arg *arg;
1580 enum event_type type;
1586 type = process_arg(event, arg, &token);
1587 if (test_type_token(type, token, EVENT_OP, "]"))
1590 top->op.right = arg;
1593 type = read_token_item(&token);
1605 static int get_op_prio(char *op)
1619 /* '>>' and '<<' are 8 */
1623 /* '==' and '!=' are 10 */
1633 do_warning("unknown op '%c'", op[0]);
1637 if (strcmp(op, "++") == 0 ||
1638 strcmp(op, "--") == 0) {
1640 } else if (strcmp(op, ">>") == 0 ||
1641 strcmp(op, "<<") == 0) {
1643 } else if (strcmp(op, ">=") == 0 ||
1644 strcmp(op, "<=") == 0) {
1646 } else if (strcmp(op, "==") == 0 ||
1647 strcmp(op, "!=") == 0) {
1649 } else if (strcmp(op, "&&") == 0) {
1651 } else if (strcmp(op, "||") == 0) {
1654 do_warning("unknown op '%s'", op);
1660 static int set_op_prio(struct print_arg *arg)
1663 /* single ops are the greatest */
1664 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1667 arg->op.prio = get_op_prio(arg->op.op);
1669 return arg->op.prio;
1672 /* Note, *tok does not get freed, but will most likely be saved */
1673 static enum event_type
1674 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1676 struct print_arg *left, *right = NULL;
1677 enum event_type type;
1680 /* the op is passed in via tok */
1683 if (arg->type == PRINT_OP && !arg->op.left) {
1684 /* handle single op */
1686 die("bad op token %s", token);
1696 do_warning("bad op token %s", token);
1701 /* make an empty left */
1703 left->type = PRINT_NULL;
1704 arg->op.left = left;
1706 right = alloc_arg();
1707 arg->op.right = right;
1709 /* do not free the token, it belongs to an op */
1711 type = process_arg(event, right, tok);
1713 } else if (strcmp(token, "?") == 0) {
1716 /* copy the top arg to the left */
1719 arg->type = PRINT_OP;
1721 arg->op.left = left;
1724 type = process_cond(event, arg, tok);
1726 } else if (strcmp(token, ">>") == 0 ||
1727 strcmp(token, "<<") == 0 ||
1728 strcmp(token, "&") == 0 ||
1729 strcmp(token, "|") == 0 ||
1730 strcmp(token, "&&") == 0 ||
1731 strcmp(token, "||") == 0 ||
1732 strcmp(token, "-") == 0 ||
1733 strcmp(token, "+") == 0 ||
1734 strcmp(token, "*") == 0 ||
1735 strcmp(token, "^") == 0 ||
1736 strcmp(token, "/") == 0 ||
1737 strcmp(token, "<") == 0 ||
1738 strcmp(token, ">") == 0 ||
1739 strcmp(token, "==") == 0 ||
1740 strcmp(token, "!=") == 0) {
1744 /* copy the top arg to the left */
1747 arg->type = PRINT_OP;
1749 arg->op.left = left;
1751 if (set_op_prio(arg) == -1) {
1752 event->flags |= EVENT_FL_FAILED;
1753 /* arg->op.op (= token) will be freed at out_free */
1758 type = read_token_item(&token);
1761 /* could just be a type pointer */
1762 if ((strcmp(arg->op.op, "*") == 0) &&
1763 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1766 if (left->type != PRINT_ATOM)
1767 die("bad pointer type");
1768 new_atom = realloc(left->atom.atom,
1769 strlen(left->atom.atom) + 3);
1773 left->atom.atom = new_atom;
1774 strcat(left->atom.atom, " *");
1782 right = alloc_arg();
1783 type = process_arg_token(event, right, tok, type);
1784 arg->op.right = right;
1786 } else if (strcmp(token, "[") == 0) {
1791 arg->type = PRINT_OP;
1793 arg->op.left = left;
1797 type = process_array(event, arg, tok);
1800 do_warning("unknown op '%s'", token);
1801 event->flags |= EVENT_FL_FAILED;
1802 /* the arg is now the left side */
1806 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
1809 /* higher prios need to be closer to the root */
1810 prio = get_op_prio(*tok);
1812 if (prio > arg->op.prio)
1813 return process_op(event, arg, tok);
1815 return process_op(event, right, tok);
1826 static enum event_type
1827 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
1830 enum event_type type;
1834 if (read_expected(EVENT_OP, "->") < 0)
1837 if (read_expect_type(EVENT_ITEM, &token) < 0)
1841 arg->type = PRINT_FIELD;
1842 arg->field.name = field;
1844 if (is_flag_field) {
1845 arg->field.field = pevent_find_any_field(event, arg->field.name);
1846 arg->field.field->flags |= FIELD_IS_FLAG;
1848 } else if (is_symbolic_field) {
1849 arg->field.field = pevent_find_any_field(event, arg->field.name);
1850 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
1851 is_symbolic_field = 0;
1854 type = read_token(&token);
1866 static char *arg_eval (struct print_arg *arg);
1868 static unsigned long long
1869 eval_type_str(unsigned long long val, const char *type, int pointer)
1879 if (type[len-1] != '*') {
1880 do_warning("pointer expected with non pointer type");
1884 ref = malloc_or_die(len);
1885 memcpy(ref, type, len);
1887 /* chop off the " *" */
1890 val = eval_type_str(val, ref, 0);
1895 /* check if this is a pointer */
1896 if (type[len - 1] == '*')
1899 /* Try to figure out the arg size*/
1900 if (strncmp(type, "struct", 6) == 0)
1904 if (strcmp(type, "u8") == 0)
1907 if (strcmp(type, "u16") == 0)
1908 return val & 0xffff;
1910 if (strcmp(type, "u32") == 0)
1911 return val & 0xffffffff;
1913 if (strcmp(type, "u64") == 0 ||
1914 strcmp(type, "s64"))
1917 if (strcmp(type, "s8") == 0)
1918 return (unsigned long long)(char)val & 0xff;
1920 if (strcmp(type, "s16") == 0)
1921 return (unsigned long long)(short)val & 0xffff;
1923 if (strcmp(type, "s32") == 0)
1924 return (unsigned long long)(int)val & 0xffffffff;
1926 if (strncmp(type, "unsigned ", 9) == 0) {
1931 if (strcmp(type, "char") == 0) {
1933 return (unsigned long long)(char)val & 0xff;
1938 if (strcmp(type, "short") == 0) {
1940 return (unsigned long long)(short)val & 0xffff;
1942 return val & 0xffff;
1945 if (strcmp(type, "int") == 0) {
1947 return (unsigned long long)(int)val & 0xffffffff;
1949 return val & 0xffffffff;
1956 * Try to figure out the type.
1958 static unsigned long long
1959 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
1961 if (arg->type != PRINT_TYPE)
1962 die("expected type argument");
1964 return eval_type_str(val, arg->typecast.type, pointer);
1967 static int arg_num_eval(struct print_arg *arg, long long *val)
1969 long long left, right;
1972 switch (arg->type) {
1974 *val = strtoll(arg->atom.atom, NULL, 0);
1977 ret = arg_num_eval(arg->typecast.item, val);
1980 *val = eval_type(*val, arg, 0);
1983 switch (arg->op.op[0]) {
1985 ret = arg_num_eval(arg->op.left, &left);
1988 ret = arg_num_eval(arg->op.right, &right);
1992 *val = left || right;
1994 *val = left | right;
1997 ret = arg_num_eval(arg->op.left, &left);
2000 ret = arg_num_eval(arg->op.right, &right);
2004 *val = left && right;
2006 *val = left & right;
2009 ret = arg_num_eval(arg->op.left, &left);
2012 ret = arg_num_eval(arg->op.right, &right);
2015 switch (arg->op.op[1]) {
2017 *val = left < right;
2020 *val = left << right;
2023 *val = left <= right;
2026 do_warning("unknown op '%s'", arg->op.op);
2031 ret = arg_num_eval(arg->op.left, &left);
2034 ret = arg_num_eval(arg->op.right, &right);
2037 switch (arg->op.op[1]) {
2039 *val = left > right;
2042 *val = left >> right;
2045 *val = left >= right;
2048 do_warning("unknown op '%s'", arg->op.op);
2053 ret = arg_num_eval(arg->op.left, &left);
2056 ret = arg_num_eval(arg->op.right, &right);
2060 if (arg->op.op[1] != '=') {
2061 do_warning("unknown op '%s'", arg->op.op);
2064 *val = left == right;
2067 ret = arg_num_eval(arg->op.left, &left);
2070 ret = arg_num_eval(arg->op.right, &right);
2074 switch (arg->op.op[1]) {
2076 *val = left != right;
2079 do_warning("unknown op '%s'", arg->op.op);
2084 /* check for negative */
2085 if (arg->op.left->type == PRINT_NULL)
2088 ret = arg_num_eval(arg->op.left, &left);
2091 ret = arg_num_eval(arg->op.right, &right);
2094 *val = left - right;
2097 if (arg->op.left->type == PRINT_NULL)
2100 ret = arg_num_eval(arg->op.left, &left);
2103 ret = arg_num_eval(arg->op.right, &right);
2106 *val = left + right;
2109 do_warning("unknown op '%s'", arg->op.op);
2115 case PRINT_FIELD ... PRINT_SYMBOL:
2119 do_warning("invalid eval type %d", arg->type);
2126 static char *arg_eval (struct print_arg *arg)
2129 static char buf[20];
2131 switch (arg->type) {
2133 return arg->atom.atom;
2135 return arg_eval(arg->typecast.item);
2137 if (!arg_num_eval(arg, &val))
2139 sprintf(buf, "%lld", val);
2143 case PRINT_FIELD ... PRINT_SYMBOL:
2147 die("invalid eval type %d", arg->type);
2154 static enum event_type
2155 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2157 enum event_type type;
2158 struct print_arg *arg = NULL;
2159 struct print_flag_sym *field;
2165 type = read_token_item(&token);
2166 if (test_type_token(type, token, EVENT_OP, "{"))
2172 type = process_arg(event, arg, &token);
2174 if (type == EVENT_OP)
2175 type = process_op(event, arg, &token);
2177 if (type == EVENT_ERROR)
2180 if (test_type_token(type, token, EVENT_DELIM, ","))
2183 field = malloc_or_die(sizeof(*field));
2184 memset(field, 0, sizeof(*field));
2186 value = arg_eval(arg);
2189 field->value = strdup(value);
2190 if (field->value == NULL)
2197 type = process_arg(event, arg, &token);
2198 if (test_type_token(type, token, EVENT_OP, "}"))
2201 value = arg_eval(arg);
2204 field->str = strdup(value);
2205 if (field->str == NULL)
2211 list = &field->next;
2214 type = read_token_item(&token);
2215 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2228 static enum event_type
2229 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2231 struct print_arg *field;
2232 enum event_type type;
2235 memset(arg, 0, sizeof(*arg));
2236 arg->type = PRINT_FLAGS;
2238 field = alloc_arg();
2240 type = process_arg(event, field, &token);
2242 /* Handle operations in the first argument */
2243 while (type == EVENT_OP)
2244 type = process_op(event, field, &token);
2246 if (test_type_token(type, token, EVENT_DELIM, ","))
2250 arg->flags.field = field;
2252 type = read_token_item(&token);
2253 if (event_item_type(type)) {
2254 arg->flags.delim = token;
2255 type = read_token_item(&token);
2258 if (test_type_token(type, token, EVENT_DELIM, ","))
2261 type = process_fields(event, &arg->flags.flags, &token);
2262 if (test_type_token(type, token, EVENT_DELIM, ")"))
2266 type = read_token_item(tok);
2275 static enum event_type
2276 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2278 struct print_arg *field;
2279 enum event_type type;
2282 memset(arg, 0, sizeof(*arg));
2283 arg->type = PRINT_SYMBOL;
2285 field = alloc_arg();
2287 type = process_arg(event, field, &token);
2288 if (test_type_token(type, token, EVENT_DELIM, ","))
2291 arg->symbol.field = field;
2293 type = process_fields(event, &arg->symbol.symbols, &token);
2294 if (test_type_token(type, token, EVENT_DELIM, ")"))
2298 type = read_token_item(tok);
2307 static enum event_type
2308 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2310 struct print_arg *field;
2311 enum event_type type;
2314 memset(arg, 0, sizeof(*arg));
2315 arg->type = PRINT_HEX;
2317 field = alloc_arg();
2318 type = process_arg(event, field, &token);
2320 if (test_type_token(type, token, EVENT_DELIM, ","))
2323 arg->hex.field = field;
2327 field = alloc_arg();
2328 type = process_arg(event, field, &token);
2330 if (test_type_token(type, token, EVENT_DELIM, ")"))
2333 arg->hex.size = field;
2336 type = read_token_item(tok);
2346 static enum event_type
2347 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2349 struct format_field *field;
2350 enum event_type type;
2353 memset(arg, 0, sizeof(*arg));
2354 arg->type = PRINT_DYNAMIC_ARRAY;
2357 * The item within the parenthesis is another field that holds
2358 * the index into where the array starts.
2360 type = read_token(&token);
2362 if (type != EVENT_ITEM)
2365 /* Find the field */
2367 field = pevent_find_field(event, token);
2371 arg->dynarray.field = field;
2372 arg->dynarray.index = 0;
2374 if (read_expected(EVENT_DELIM, ")") < 0)
2378 type = read_token_item(&token);
2380 if (type != EVENT_OP || strcmp(token, "[") != 0)
2385 type = process_arg(event, arg, &token);
2386 if (type == EVENT_ERROR)
2389 if (!test_type_token(type, token, EVENT_OP, "]"))
2393 type = read_token_item(tok);
2404 static enum event_type
2405 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2407 struct print_arg *item_arg;
2408 enum event_type type;
2411 type = process_arg(event, arg, &token);
2413 if (type == EVENT_ERROR)
2416 if (type == EVENT_OP)
2417 type = process_op(event, arg, &token);
2419 if (type == EVENT_ERROR)
2422 if (test_type_token(type, token, EVENT_DELIM, ")"))
2426 type = read_token_item(&token);
2429 * If the next token is an item or another open paren, then
2430 * this was a typecast.
2432 if (event_item_type(type) ||
2433 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2435 /* make this a typecast and contine */
2437 /* prevous must be an atom */
2438 if (arg->type != PRINT_ATOM)
2439 die("previous needed to be PRINT_ATOM");
2441 item_arg = alloc_arg();
2443 arg->type = PRINT_TYPE;
2444 arg->typecast.type = arg->atom.atom;
2445 arg->typecast.item = item_arg;
2446 type = process_arg_token(event, item_arg, &token, type);
2460 static enum event_type
2461 process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
2464 enum event_type type;
2467 if (read_expect_type(EVENT_ITEM, &token) < 0)
2470 arg->type = PRINT_STRING;
2471 arg->string.string = token;
2472 arg->string.offset = -1;
2474 if (read_expected(EVENT_DELIM, ")") < 0)
2477 type = read_token(&token);
2489 static struct pevent_function_handler *
2490 find_func_handler(struct pevent *pevent, char *func_name)
2492 struct pevent_function_handler *func;
2494 for (func = pevent->func_handlers; func; func = func->next) {
2495 if (strcmp(func->name, func_name) == 0)
2502 static void remove_func_handler(struct pevent *pevent, char *func_name)
2504 struct pevent_function_handler *func;
2505 struct pevent_function_handler **next;
2507 next = &pevent->func_handlers;
2508 while ((func = *next)) {
2509 if (strcmp(func->name, func_name) == 0) {
2511 free_func_handle(func);
2518 static enum event_type
2519 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2520 struct print_arg *arg, char **tok)
2522 struct print_arg **next_arg;
2523 struct print_arg *farg;
2524 enum event_type type;
2529 arg->type = PRINT_FUNC;
2530 arg->func.func = func;
2534 next_arg = &(arg->func.args);
2535 for (i = 0; i < func->nr_args; i++) {
2537 type = process_arg(event, farg, &token);
2538 if (i < (func->nr_args - 1))
2543 if (test_type_token(type, token, EVENT_DELIM, test)) {
2550 next_arg = &(farg->next);
2554 type = read_token(&token);
2560 static enum event_type
2561 process_function(struct event_format *event, struct print_arg *arg,
2562 char *token, char **tok)
2564 struct pevent_function_handler *func;
2566 if (strcmp(token, "__print_flags") == 0) {
2569 return process_flags(event, arg, tok);
2571 if (strcmp(token, "__print_symbolic") == 0) {
2573 is_symbolic_field = 1;
2574 return process_symbols(event, arg, tok);
2576 if (strcmp(token, "__print_hex") == 0) {
2578 return process_hex(event, arg, tok);
2580 if (strcmp(token, "__get_str") == 0) {
2582 return process_str(event, arg, tok);
2584 if (strcmp(token, "__get_dynamic_array") == 0) {
2586 return process_dynamic_array(event, arg, tok);
2589 func = find_func_handler(event->pevent, token);
2592 return process_func_handler(event, func, arg, tok);
2595 do_warning("function %s not defined", token);
2600 static enum event_type
2601 process_arg_token(struct event_format *event, struct print_arg *arg,
2602 char **tok, enum event_type type)
2611 if (strcmp(token, "REC") == 0) {
2613 type = process_entry(event, arg, &token);
2617 /* test the next token */
2618 type = read_token_item(&token);
2621 * If the next token is a parenthesis, then this
2624 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
2627 /* this will free atom. */
2628 type = process_function(event, arg, atom, &token);
2631 /* atoms can be more than one token long */
2632 while (type == EVENT_ITEM) {
2634 new_atom = realloc(atom,
2635 strlen(atom) + strlen(token) + 2);
2644 strcat(atom, token);
2646 type = read_token_item(&token);
2649 arg->type = PRINT_ATOM;
2650 arg->atom.atom = atom;
2655 arg->type = PRINT_ATOM;
2656 arg->atom.atom = token;
2657 type = read_token_item(&token);
2660 if (strcmp(token, "(") == 0) {
2662 type = process_paren(event, arg, &token);
2666 /* handle single ops */
2667 arg->type = PRINT_OP;
2669 arg->op.left = NULL;
2670 type = process_op(event, arg, &token);
2672 /* On error, the op is freed */
2673 if (type == EVENT_ERROR)
2676 /* return error type if errored */
2679 case EVENT_ERROR ... EVENT_NEWLINE:
2681 die("unexpected type %d", type);
2688 static int event_read_print_args(struct event_format *event, struct print_arg **list)
2690 enum event_type type = EVENT_ERROR;
2691 struct print_arg *arg;
2696 if (type == EVENT_NEWLINE) {
2697 type = read_token_item(&token);
2703 type = process_arg(event, arg, &token);
2705 if (type == EVENT_ERROR) {
2714 if (type == EVENT_OP) {
2715 type = process_op(event, arg, &token);
2717 if (type == EVENT_ERROR) {
2726 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
2733 } while (type != EVENT_NONE);
2735 if (type != EVENT_NONE && type != EVENT_ERROR)
2741 static int event_read_print(struct event_format *event)
2743 enum event_type type;
2747 if (read_expected_item(EVENT_ITEM, "print") < 0)
2750 if (read_expected(EVENT_ITEM, "fmt") < 0)
2753 if (read_expected(EVENT_OP, ":") < 0)
2756 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
2760 event->print_fmt.format = token;
2761 event->print_fmt.args = NULL;
2763 /* ok to have no arg */
2764 type = read_token_item(&token);
2766 if (type == EVENT_NONE)
2769 /* Handle concatenation of print lines */
2770 if (type == EVENT_DQUOTE) {
2773 cat = malloc_or_die(strlen(event->print_fmt.format) +
2775 strcpy(cat, event->print_fmt.format);
2778 free_token(event->print_fmt.format);
2779 event->print_fmt.format = NULL;
2784 if (test_type_token(type, token, EVENT_DELIM, ","))
2789 ret = event_read_print_args(event, &event->print_fmt.args);
2801 * pevent_find_common_field - return a common field by event
2802 * @event: handle for the event
2803 * @name: the name of the common field to return
2805 * Returns a common field from the event by the given @name.
2806 * This only searchs the common fields and not all field.
2808 struct format_field *
2809 pevent_find_common_field(struct event_format *event, const char *name)
2811 struct format_field *format;
2813 for (format = event->format.common_fields;
2814 format; format = format->next) {
2815 if (strcmp(format->name, name) == 0)
2823 * pevent_find_field - find a non-common field
2824 * @event: handle for the event
2825 * @name: the name of the non-common field
2827 * Returns a non-common field by the given @name.
2828 * This does not search common fields.
2830 struct format_field *
2831 pevent_find_field(struct event_format *event, const char *name)
2833 struct format_field *format;
2835 for (format = event->format.fields;
2836 format; format = format->next) {
2837 if (strcmp(format->name, name) == 0)
2845 * pevent_find_any_field - find any field by name
2846 * @event: handle for the event
2847 * @name: the name of the field
2849 * Returns a field by the given @name.
2850 * This searchs the common field names first, then
2851 * the non-common ones if a common one was not found.
2853 struct format_field *
2854 pevent_find_any_field(struct event_format *event, const char *name)
2856 struct format_field *format;
2858 format = pevent_find_common_field(event, name);
2861 return pevent_find_field(event, name);
2865 * pevent_read_number - read a number from data
2866 * @pevent: handle for the pevent
2867 * @ptr: the raw data
2868 * @size: the size of the data that holds the number
2870 * Returns the number (converted to host) from the
2873 unsigned long long pevent_read_number(struct pevent *pevent,
2874 const void *ptr, int size)
2878 return *(unsigned char *)ptr;
2880 return data2host2(pevent, ptr);
2882 return data2host4(pevent, ptr);
2884 return data2host8(pevent, ptr);
2892 * pevent_read_number_field - read a number from data
2893 * @field: a handle to the field
2894 * @data: the raw data to read
2895 * @value: the value to place the number in
2897 * Reads raw data according to a field offset and size,
2898 * and translates it into @value.
2900 * Returns 0 on success, -1 otherwise.
2902 int pevent_read_number_field(struct format_field *field, const void *data,
2903 unsigned long long *value)
2907 switch (field->size) {
2912 *value = pevent_read_number(field->event->pevent,
2913 data + field->offset, field->size);
2920 static int get_common_info(struct pevent *pevent,
2921 const char *type, int *offset, int *size)
2923 struct event_format *event;
2924 struct format_field *field;
2927 * All events should have the same common elements.
2928 * Pick any event to find where the type is;
2930 if (!pevent->events)
2931 die("no event_list!");
2933 event = pevent->events[0];
2934 field = pevent_find_common_field(event, type);
2938 *offset = field->offset;
2939 *size = field->size;
2944 static int __parse_common(struct pevent *pevent, void *data,
2945 int *size, int *offset, const char *name)
2950 ret = get_common_info(pevent, name, offset, size);
2954 return pevent_read_number(pevent, data + *offset, *size);
2957 static int trace_parse_common_type(struct pevent *pevent, void *data)
2959 return __parse_common(pevent, data,
2960 &pevent->type_size, &pevent->type_offset,
2964 static int parse_common_pid(struct pevent *pevent, void *data)
2966 return __parse_common(pevent, data,
2967 &pevent->pid_size, &pevent->pid_offset,
2971 static int parse_common_pc(struct pevent *pevent, void *data)
2973 return __parse_common(pevent, data,
2974 &pevent->pc_size, &pevent->pc_offset,
2975 "common_preempt_count");
2978 static int parse_common_flags(struct pevent *pevent, void *data)
2980 return __parse_common(pevent, data,
2981 &pevent->flags_size, &pevent->flags_offset,
2985 static int parse_common_lock_depth(struct pevent *pevent, void *data)
2987 return __parse_common(pevent, data,
2988 &pevent->ld_size, &pevent->ld_offset,
2989 "common_lock_depth");
2992 static int parse_common_migrate_disable(struct pevent *pevent, void *data)
2994 return __parse_common(pevent, data,
2995 &pevent->ld_size, &pevent->ld_offset,
2996 "common_migrate_disable");
2999 static int events_id_cmp(const void *a, const void *b);
3002 * pevent_find_event - find an event by given id
3003 * @pevent: a handle to the pevent
3004 * @id: the id of the event
3006 * Returns an event that has a given @id.
3008 struct event_format *pevent_find_event(struct pevent *pevent, int id)
3010 struct event_format **eventptr;
3011 struct event_format key;
3012 struct event_format *pkey = &key;
3014 /* Check cache first */
3015 if (pevent->last_event && pevent->last_event->id == id)
3016 return pevent->last_event;
3020 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
3021 sizeof(*pevent->events), events_id_cmp);
3024 pevent->last_event = *eventptr;
3032 * pevent_find_event_by_name - find an event by given name
3033 * @pevent: a handle to the pevent
3034 * @sys: the system name to search for
3035 * @name: the name of the event to search for
3037 * This returns an event with a given @name and under the system
3038 * @sys. If @sys is NULL the first event with @name is returned.
3040 struct event_format *
3041 pevent_find_event_by_name(struct pevent *pevent,
3042 const char *sys, const char *name)
3044 struct event_format *event;
3047 if (pevent->last_event &&
3048 strcmp(pevent->last_event->name, name) == 0 &&
3049 (!sys || strcmp(pevent->last_event->system, sys) == 0))
3050 return pevent->last_event;
3052 for (i = 0; i < pevent->nr_events; i++) {
3053 event = pevent->events[i];
3054 if (strcmp(event->name, name) == 0) {
3057 if (strcmp(event->system, sys) == 0)
3061 if (i == pevent->nr_events)
3064 pevent->last_event = event;
3068 static unsigned long long
3069 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
3071 struct pevent *pevent = event->pevent;
3072 unsigned long long val = 0;
3073 unsigned long long left, right;
3074 struct print_arg *typearg = NULL;
3075 struct print_arg *larg;
3076 unsigned long offset;
3077 unsigned int field_size;
3079 switch (arg->type) {
3084 return strtoull(arg->atom.atom, NULL, 0);
3086 if (!arg->field.field) {
3087 arg->field.field = pevent_find_any_field(event, arg->field.name);
3088 if (!arg->field.field)
3089 die("field %s not found", arg->field.name);
3091 /* must be a number */
3092 val = pevent_read_number(pevent, data + arg->field.field->offset,
3093 arg->field.field->size);
3100 val = eval_num_arg(data, size, event, arg->typecast.item);
3101 return eval_type(val, arg, 0);
3108 val = process_defined_func(&s, data, size, event, arg);
3109 trace_seq_destroy(&s);
3113 if (strcmp(arg->op.op, "[") == 0) {
3115 * Arrays are special, since we don't want
3116 * to read the arg as is.
3118 right = eval_num_arg(data, size, event, arg->op.right);
3120 /* handle typecasts */
3121 larg = arg->op.left;
3122 while (larg->type == PRINT_TYPE) {
3125 larg = larg->typecast.item;
3128 /* Default to long size */
3129 field_size = pevent->long_size;
3131 switch (larg->type) {
3132 case PRINT_DYNAMIC_ARRAY:
3133 offset = pevent_read_number(pevent,
3134 data + larg->dynarray.field->offset,
3135 larg->dynarray.field->size);
3136 if (larg->dynarray.field->elementsize)
3137 field_size = larg->dynarray.field->elementsize;
3139 * The actual length of the dynamic array is stored
3140 * in the top half of the field, and the offset
3141 * is in the bottom half of the 32 bit field.
3147 if (!larg->field.field) {
3149 pevent_find_any_field(event, larg->field.name);
3150 if (!larg->field.field)
3151 die("field %s not found", larg->field.name);
3153 field_size = larg->field.field->elementsize;
3154 offset = larg->field.field->offset +
3155 right * larg->field.field->elementsize;
3158 goto default_op; /* oops, all bets off */
3160 val = pevent_read_number(pevent,
3161 data + offset, field_size);
3163 val = eval_type(val, typearg, 1);
3165 } else if (strcmp(arg->op.op, "?") == 0) {
3166 left = eval_num_arg(data, size, event, arg->op.left);
3167 arg = arg->op.right;
3169 val = eval_num_arg(data, size, event, arg->op.left);
3171 val = eval_num_arg(data, size, event, arg->op.right);
3175 left = eval_num_arg(data, size, event, arg->op.left);
3176 right = eval_num_arg(data, size, event, arg->op.right);
3177 switch (arg->op.op[0]) {
3179 switch (arg->op.op[1]) {
3184 val = left != right;
3187 die("unknown op '%s'", arg->op.op);
3195 val = left || right;
3201 val = left && right;
3206 switch (arg->op.op[1]) {
3211 val = left << right;
3214 val = left <= right;
3217 die("unknown op '%s'", arg->op.op);
3221 switch (arg->op.op[1]) {
3226 val = left >> right;
3229 val = left >= right;
3232 die("unknown op '%s'", arg->op.op);
3236 if (arg->op.op[1] != '=')
3237 die("unknown op '%s'", arg->op.op);
3238 val = left == right;
3253 die("unknown op '%s'", arg->op.op);
3256 default: /* not sure what to do there */
3264 unsigned long long value;
3267 static const struct flag flags[] = {
3268 { "HI_SOFTIRQ", 0 },
3269 { "TIMER_SOFTIRQ", 1 },
3270 { "NET_TX_SOFTIRQ", 2 },
3271 { "NET_RX_SOFTIRQ", 3 },
3272 { "BLOCK_SOFTIRQ", 4 },
3273 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3274 { "TASKLET_SOFTIRQ", 6 },
3275 { "SCHED_SOFTIRQ", 7 },
3276 { "HRTIMER_SOFTIRQ", 8 },
3277 { "RCU_SOFTIRQ", 9 },
3279 { "HRTIMER_NORESTART", 0 },
3280 { "HRTIMER_RESTART", 1 },
3283 static unsigned long long eval_flag(const char *flag)
3288 * Some flags in the format files do not get converted.
3289 * If the flag is not numeric, see if it is something that
3290 * we already know about.
3292 if (isdigit(flag[0]))
3293 return strtoull(flag, NULL, 0);
3295 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3296 if (strcmp(flags[i].name, flag) == 0)
3297 return flags[i].value;
3302 static void print_str_to_seq(struct trace_seq *s, const char *format,
3303 int len_arg, const char *str)
3306 trace_seq_printf(s, format, len_arg, str);
3308 trace_seq_printf(s, format, str);
3311 static void print_str_arg(struct trace_seq *s, void *data, int size,
3312 struct event_format *event, const char *format,
3313 int len_arg, struct print_arg *arg)
3315 struct pevent *pevent = event->pevent;
3316 struct print_flag_sym *flag;
3317 struct format_field *field;
3318 unsigned long long val, fval;
3325 switch (arg->type) {
3330 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3333 field = arg->field.field;
3335 field = pevent_find_any_field(event, arg->field.name);
3337 die("field %s not found", arg->field.name);
3338 arg->field.field = field;
3340 /* Zero sized fields, mean the rest of the data */
3341 len = field->size ? : size - field->offset;
3344 * Some events pass in pointers. If this is not an array
3345 * and the size is the same as long_size, assume that it
3348 if (!(field->flags & FIELD_IS_ARRAY) &&
3349 field->size == pevent->long_size) {
3350 addr = *(unsigned long *)(data + field->offset);
3351 trace_seq_printf(s, "%lx", addr);
3354 str = malloc_or_die(len + 1);
3355 memcpy(str, data + field->offset, len);
3357 print_str_to_seq(s, format, len_arg, str);
3361 val = eval_num_arg(data, size, event, arg->flags.field);
3363 for (flag = arg->flags.flags; flag; flag = flag->next) {
3364 fval = eval_flag(flag->value);
3365 if (!val && !fval) {
3366 print_str_to_seq(s, format, len_arg, flag->str);
3369 if (fval && (val & fval) == fval) {
3370 if (print && arg->flags.delim)
3371 trace_seq_puts(s, arg->flags.delim);
3372 print_str_to_seq(s, format, len_arg, flag->str);
3379 val = eval_num_arg(data, size, event, arg->symbol.field);
3380 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3381 fval = eval_flag(flag->value);
3383 print_str_to_seq(s, format, len_arg, flag->str);
3389 field = arg->hex.field->field.field;
3391 str = arg->hex.field->field.name;
3392 field = pevent_find_any_field(event, str);
3394 die("field %s not found", str);
3395 arg->hex.field->field.field = field;
3397 hex = data + field->offset;
3398 len = eval_num_arg(data, size, event, arg->hex.size);
3399 for (i = 0; i < len; i++) {
3401 trace_seq_putc(s, ' ');
3402 trace_seq_printf(s, "%02x", hex[i]);
3408 case PRINT_STRING: {
3411 if (arg->string.offset == -1) {
3412 struct format_field *f;
3414 f = pevent_find_any_field(event, arg->string.string);
3415 arg->string.offset = f->offset;
3417 str_offset = data2host4(pevent, data + arg->string.offset);
3418 str_offset &= 0xffff;
3419 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
3423 print_str_to_seq(s, format, len_arg, arg->string.string);
3427 * The only op for string should be ? :
3429 if (arg->op.op[0] != '?')
3431 val = eval_num_arg(data, size, event, arg->op.left);
3433 print_str_arg(s, data, size, event,
3434 format, len_arg, arg->op.right->op.left);
3436 print_str_arg(s, data, size, event,
3437 format, len_arg, arg->op.right->op.right);
3440 process_defined_func(s, data, size, event, arg);
3448 static unsigned long long
3449 process_defined_func(struct trace_seq *s, void *data, int size,
3450 struct event_format *event, struct print_arg *arg)
3452 struct pevent_function_handler *func_handle = arg->func.func;
3453 struct pevent_func_params *param;
3454 unsigned long long *args;
3455 unsigned long long ret;
3456 struct print_arg *farg;
3457 struct trace_seq str;
3459 struct save_str *next;
3461 } *strings = NULL, *string;
3464 if (!func_handle->nr_args) {
3465 ret = (*func_handle->func)(s, NULL);
3469 farg = arg->func.args;
3470 param = func_handle->params;
3472 args = malloc_or_die(sizeof(*args) * func_handle->nr_args);
3473 for (i = 0; i < func_handle->nr_args; i++) {
3474 switch (param->type) {
3475 case PEVENT_FUNC_ARG_INT:
3476 case PEVENT_FUNC_ARG_LONG:
3477 case PEVENT_FUNC_ARG_PTR:
3478 args[i] = eval_num_arg(data, size, event, farg);
3480 case PEVENT_FUNC_ARG_STRING:
3481 trace_seq_init(&str);
3482 print_str_arg(&str, data, size, event, "%s", -1, farg);
3483 trace_seq_terminate(&str);
3484 string = malloc_or_die(sizeof(*string));
3485 string->next = strings;
3486 string->str = strdup(str.buffer);
3490 args[i] = (uintptr_t)string->str;
3492 trace_seq_destroy(&str);
3496 * Something went totally wrong, this is not
3497 * an input error, something in this code broke.
3499 die("Unexpected end of arguments\n");
3503 param = param->next;
3506 ret = (*func_handle->func)(s, args);
3510 strings = string->next;
3516 /* TBD : handle return type here */
3520 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
3522 struct pevent *pevent = event->pevent;
3523 struct format_field *field, *ip_field;
3524 struct print_arg *args, *arg, **next;
3525 unsigned long long ip, val;
3530 field = pevent->bprint_buf_field;
3531 ip_field = pevent->bprint_ip_field;
3534 field = pevent_find_field(event, "buf");
3536 die("can't find buffer field for binary printk");
3537 ip_field = pevent_find_field(event, "ip");
3539 die("can't find ip field for binary printk");
3540 pevent->bprint_buf_field = field;
3541 pevent->bprint_ip_field = ip_field;
3544 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
3547 * The first arg is the IP pointer.
3554 arg->type = PRINT_ATOM;
3555 arg->atom.atom = malloc_or_die(32);
3556 sprintf(arg->atom.atom, "%lld", ip);
3558 /* skip the first "%pf : " */
3559 for (ptr = fmt + 6, bptr = data + field->offset;
3560 bptr < data + size && *ptr; ptr++) {
3591 vsize = pevent->long_size;
3605 /* the pointers are always 4 bytes aligned */
3606 bptr = (void *)(((unsigned long)bptr + 3) &
3608 val = pevent_read_number(pevent, bptr, vsize);
3612 arg->type = PRINT_ATOM;
3613 arg->atom.atom = malloc_or_die(32);
3614 sprintf(arg->atom.atom, "%lld", val);
3618 * The '*' case means that an arg is used as the length.
3619 * We need to continue to figure out for what.
3628 arg->type = PRINT_BSTRING;
3629 arg->string.string = strdup(bptr);
3630 if (!arg->string.string)
3632 bptr += strlen(bptr) + 1;
3644 static void free_args(struct print_arg *args)
3646 struct print_arg *next;
3657 get_bprint_format(void *data, int size __maybe_unused,
3658 struct event_format *event)
3660 struct pevent *pevent = event->pevent;
3661 unsigned long long addr;
3662 struct format_field *field;
3663 struct printk_map *printk;
3667 field = pevent->bprint_fmt_field;
3670 field = pevent_find_field(event, "fmt");
3672 die("can't find format field for binary printk");
3673 pevent->bprint_fmt_field = field;
3676 addr = pevent_read_number(pevent, data + field->offset, field->size);
3678 printk = find_printk(pevent, addr);
3680 format = malloc_or_die(45);
3681 sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
3687 /* Remove any quotes. */
3690 format = malloc_or_die(strlen(p) + 10);
3691 sprintf(format, "%s : %s", "%pf", p);
3692 /* remove ending quotes and new line since we will add one too */
3693 p = format + strlen(format) - 1;
3698 if (strcmp(p, "\\n") == 0)
3704 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
3705 struct event_format *event, struct print_arg *arg)
3708 char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3710 if (arg->type == PRINT_FUNC) {
3711 process_defined_func(s, data, size, event, arg);
3715 if (arg->type != PRINT_FIELD) {
3716 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
3722 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
3723 if (!arg->field.field) {
3725 pevent_find_any_field(event, arg->field.name);
3726 if (!arg->field.field)
3727 die("field %s not found", arg->field.name);
3729 if (arg->field.field->size != 6) {
3730 trace_seq_printf(s, "INVALIDMAC");
3733 buf = data + arg->field.field->offset;
3734 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
3737 static int is_printable_array(char *p, unsigned int len)
3741 for (i = 0; i < len && p[i]; i++)
3747 static void print_event_fields(struct trace_seq *s, void *data, int size,
3748 struct event_format *event)
3750 struct format_field *field;
3751 unsigned long long val;
3752 unsigned int offset, len, i;
3754 field = event->format.fields;
3756 trace_seq_printf(s, " %s=", field->name);
3757 if (field->flags & FIELD_IS_ARRAY) {
3758 offset = field->offset;
3760 if (field->flags & FIELD_IS_DYNAMIC) {
3761 val = pevent_read_number(event->pevent, data + offset, len);
3766 if (field->flags & FIELD_IS_STRING &&
3767 is_printable_array(data + offset, len)) {
3768 trace_seq_printf(s, "%s", (char *)data + offset);
3770 trace_seq_puts(s, "ARRAY[");
3771 for (i = 0; i < len; i++) {
3773 trace_seq_puts(s, ", ");
3774 trace_seq_printf(s, "%02x",
3775 *((unsigned char *)data + offset + i));
3777 trace_seq_putc(s, ']');
3778 field->flags &= ~FIELD_IS_STRING;
3781 val = pevent_read_number(event->pevent, data + field->offset,
3783 if (field->flags & FIELD_IS_POINTER) {
3784 trace_seq_printf(s, "0x%llx", val);
3785 } else if (field->flags & FIELD_IS_SIGNED) {
3786 switch (field->size) {
3789 * If field is long then print it in hex.
3790 * A long usually stores pointers.
3792 if (field->flags & FIELD_IS_LONG)
3793 trace_seq_printf(s, "0x%x", (int)val);
3795 trace_seq_printf(s, "%d", (int)val);
3798 trace_seq_printf(s, "%2d", (short)val);
3801 trace_seq_printf(s, "%1d", (char)val);
3804 trace_seq_printf(s, "%lld", val);
3807 if (field->flags & FIELD_IS_LONG)
3808 trace_seq_printf(s, "0x%llx", val);
3810 trace_seq_printf(s, "%llu", val);
3813 field = field->next;
3817 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
3819 struct pevent *pevent = event->pevent;
3820 struct print_fmt *print_fmt = &event->print_fmt;
3821 struct print_arg *arg = print_fmt->args;
3822 struct print_arg *args = NULL;
3823 const char *ptr = print_fmt->format;
3824 unsigned long long val;
3825 struct func_map *func;
3826 const char *saveptr;
3827 char *bprint_fmt = NULL;
3835 if (event->flags & EVENT_FL_FAILED) {
3836 trace_seq_printf(s, "[FAILED TO PARSE]");
3837 print_event_fields(s, data, size, event);
3841 if (event->flags & EVENT_FL_ISBPRINT) {
3842 bprint_fmt = get_bprint_format(data, size, event);
3843 args = make_bprint_args(bprint_fmt, data, size, event);
3848 for (; *ptr; ptr++) {
3854 trace_seq_putc(s, '\n');
3857 trace_seq_putc(s, '\t');
3860 trace_seq_putc(s, '\r');
3863 trace_seq_putc(s, '\\');
3866 trace_seq_putc(s, *ptr);
3870 } else if (*ptr == '%') {
3878 trace_seq_putc(s, '%');
3881 /* FIXME: need to handle properly */
3893 /* The argument is the length. */
3895 do_warning("no argument match");
3896 event->flags |= EVENT_FL_FAILED;
3899 len_arg = eval_num_arg(data, size, event, arg);
3909 if (pevent->long_size == 4)
3914 if (*(ptr+1) == 'F' ||
3918 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
3919 print_mac_arg(s, *(ptr+1), data, size, event, arg);
3932 do_warning("no argument match");
3933 event->flags |= EVENT_FL_FAILED;
3937 len = ((unsigned long)ptr + 1) -
3938 (unsigned long)saveptr;
3940 /* should never happen */
3942 do_warning("bad format!");
3943 event->flags |= EVENT_FL_FAILED;
3947 memcpy(format, saveptr, len);
3950 val = eval_num_arg(data, size, event, arg);
3954 func = find_func(pevent, val);
3956 trace_seq_puts(s, func->func);
3957 if (show_func == 'F')
3964 if (pevent->long_size == 8 && ls &&
3965 sizeof(long) != 8) {
3969 /* make %l into %ll */
3970 p = strchr(format, 'l');
3972 memmove(p+1, p, strlen(p)+1);
3973 else if (strcmp(format, "%p") == 0)
3974 strcpy(format, "0x%llx");
3979 trace_seq_printf(s, format, len_arg, (char)val);
3981 trace_seq_printf(s, format, (char)val);
3985 trace_seq_printf(s, format, len_arg, (short)val);
3987 trace_seq_printf(s, format, (short)val);
3991 trace_seq_printf(s, format, len_arg, (int)val);
3993 trace_seq_printf(s, format, (int)val);
3997 trace_seq_printf(s, format, len_arg, (long)val);
3999 trace_seq_printf(s, format, (long)val);
4003 trace_seq_printf(s, format, len_arg,
4006 trace_seq_printf(s, format, (long long)val);
4009 do_warning("bad count (%d)", ls);
4010 event->flags |= EVENT_FL_FAILED;
4015 do_warning("no matching argument");
4016 event->flags |= EVENT_FL_FAILED;
4020 len = ((unsigned long)ptr + 1) -
4021 (unsigned long)saveptr;
4023 /* should never happen */
4025 do_warning("bad format!");
4026 event->flags |= EVENT_FL_FAILED;
4030 memcpy(format, saveptr, len);
4034 print_str_arg(s, data, size, event,
4035 format, len_arg, arg);
4039 trace_seq_printf(s, ">%c<", *ptr);
4043 trace_seq_putc(s, *ptr);
4046 if (event->flags & EVENT_FL_FAILED) {
4048 trace_seq_printf(s, "[FAILED TO PARSE]");
4058 * pevent_data_lat_fmt - parse the data for the latency format
4059 * @pevent: a handle to the pevent
4060 * @s: the trace_seq to write to
4061 * @record: the record to read from
4063 * This parses out the Latency format (interrupts disabled,
4064 * need rescheduling, in hard/soft interrupt, preempt count
4065 * and lock depth) and places it into the trace_seq.
4067 void pevent_data_lat_fmt(struct pevent *pevent,
4068 struct trace_seq *s, struct pevent_record *record)
4070 static int check_lock_depth = 1;
4071 static int check_migrate_disable = 1;
4072 static int lock_depth_exists;
4073 static int migrate_disable_exists;
4074 unsigned int lat_flags;
4077 int migrate_disable;
4080 void *data = record->data;
4082 lat_flags = parse_common_flags(pevent, data);
4083 pc = parse_common_pc(pevent, data);
4084 /* lock_depth may not always exist */
4085 if (lock_depth_exists)
4086 lock_depth = parse_common_lock_depth(pevent, data);
4087 else if (check_lock_depth) {
4088 lock_depth = parse_common_lock_depth(pevent, data);
4090 check_lock_depth = 0;
4092 lock_depth_exists = 1;
4095 /* migrate_disable may not always exist */
4096 if (migrate_disable_exists)
4097 migrate_disable = parse_common_migrate_disable(pevent, data);
4098 else if (check_migrate_disable) {
4099 migrate_disable = parse_common_migrate_disable(pevent, data);
4100 if (migrate_disable < 0)
4101 check_migrate_disable = 0;
4103 migrate_disable_exists = 1;
4106 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
4107 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
4109 trace_seq_printf(s, "%c%c%c",
4110 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
4111 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
4113 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
4115 (hardirq && softirq) ? 'H' :
4116 hardirq ? 'h' : softirq ? 's' : '.');
4119 trace_seq_printf(s, "%x", pc);
4121 trace_seq_putc(s, '.');
4123 if (migrate_disable_exists) {
4124 if (migrate_disable < 0)
4125 trace_seq_putc(s, '.');
4127 trace_seq_printf(s, "%d", migrate_disable);
4130 if (lock_depth_exists) {
4132 trace_seq_putc(s, '.');
4134 trace_seq_printf(s, "%d", lock_depth);
4137 trace_seq_terminate(s);
4141 * pevent_data_type - parse out the given event type
4142 * @pevent: a handle to the pevent
4143 * @rec: the record to read from
4145 * This returns the event id from the @rec.
4147 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
4149 return trace_parse_common_type(pevent, rec->data);
4153 * pevent_data_event_from_type - find the event by a given type
4154 * @pevent: a handle to the pevent
4155 * @type: the type of the event.
4157 * This returns the event form a given @type;
4159 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
4161 return pevent_find_event(pevent, type);
4165 * pevent_data_pid - parse the PID from raw data
4166 * @pevent: a handle to the pevent
4167 * @rec: the record to parse
4169 * This returns the PID from a raw data.
4171 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
4173 return parse_common_pid(pevent, rec->data);
4177 * pevent_data_comm_from_pid - return the command line from PID
4178 * @pevent: a handle to the pevent
4179 * @pid: the PID of the task to search for
4181 * This returns a pointer to the command line that has the given
4184 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
4188 comm = find_cmdline(pevent, pid);
4193 * pevent_data_comm_from_pid - parse the data into the print format
4194 * @s: the trace_seq to write to
4195 * @event: the handle to the event
4196 * @record: the record to read from
4198 * This parses the raw @data using the given @event information and
4199 * writes the print format into the trace_seq.
4201 void pevent_event_info(struct trace_seq *s, struct event_format *event,
4202 struct pevent_record *record)
4204 int print_pretty = 1;
4206 if (event->pevent->print_raw)
4207 print_event_fields(s, record->data, record->size, event);
4211 print_pretty = event->handler(s, record, event,
4215 pretty_print(s, record->data, record->size, event);
4218 trace_seq_terminate(s);
4221 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
4222 struct pevent_record *record)
4224 static char *spaces = " "; /* 20 spaces */
4225 struct event_format *event;
4227 unsigned long usecs;
4228 unsigned long nsecs;
4230 void *data = record->data;
4236 secs = record->ts / NSECS_PER_SEC;
4237 nsecs = record->ts - secs * NSECS_PER_SEC;
4239 if (record->size < 0) {
4240 do_warning("ug! negative record size %d", record->size);
4244 type = trace_parse_common_type(pevent, data);
4246 event = pevent_find_event(pevent, type);
4248 do_warning("ug! no event found for type %d", type);
4252 pid = parse_common_pid(pevent, data);
4253 comm = find_cmdline(pevent, pid);
4255 if (pevent->latency_format) {
4256 trace_seq_printf(s, "%8.8s-%-5d %3d",
4257 comm, pid, record->cpu);
4258 pevent_data_lat_fmt(pevent, s, record);
4260 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
4262 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
4266 usecs = (nsecs + 500) / NSECS_PER_USEC;
4270 trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
4272 /* Space out the event names evenly. */
4273 len = strlen(event->name);
4275 trace_seq_printf(s, "%.*s", 20 - len, spaces);
4277 pevent_event_info(s, event, record);
4280 static int events_id_cmp(const void *a, const void *b)
4282 struct event_format * const * ea = a;
4283 struct event_format * const * eb = b;
4285 if ((*ea)->id < (*eb)->id)
4288 if ((*ea)->id > (*eb)->id)
4294 static int events_name_cmp(const void *a, const void *b)
4296 struct event_format * const * ea = a;
4297 struct event_format * const * eb = b;
4300 res = strcmp((*ea)->name, (*eb)->name);
4304 res = strcmp((*ea)->system, (*eb)->system);
4308 return events_id_cmp(a, b);
4311 static int events_system_cmp(const void *a, const void *b)
4313 struct event_format * const * ea = a;
4314 struct event_format * const * eb = b;
4317 res = strcmp((*ea)->system, (*eb)->system);
4321 res = strcmp((*ea)->name, (*eb)->name);
4325 return events_id_cmp(a, b);
4328 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
4330 struct event_format **events;
4331 int (*sort)(const void *a, const void *b);
4333 events = pevent->sort_events;
4335 if (events && pevent->last_type == sort_type)
4339 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
4343 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
4344 events[pevent->nr_events] = NULL;
4346 pevent->sort_events = events;
4348 /* the internal events are sorted by id */
4349 if (sort_type == EVENT_SORT_ID) {
4350 pevent->last_type = sort_type;
4355 switch (sort_type) {
4357 sort = events_id_cmp;
4359 case EVENT_SORT_NAME:
4360 sort = events_name_cmp;
4362 case EVENT_SORT_SYSTEM:
4363 sort = events_system_cmp;
4369 qsort(events, pevent->nr_events, sizeof(*events), sort);
4370 pevent->last_type = sort_type;
4375 static struct format_field **
4376 get_event_fields(const char *type, const char *name,
4377 int count, struct format_field *list)
4379 struct format_field **fields;
4380 struct format_field *field;
4383 fields = malloc_or_die(sizeof(*fields) * (count + 1));
4384 for (field = list; field; field = field->next) {
4385 fields[i++] = field;
4386 if (i == count + 1) {
4387 do_warning("event %s has more %s fields than specified",
4395 do_warning("event %s has less %s fields than specified",
4404 * pevent_event_common_fields - return a list of common fields for an event
4405 * @event: the event to return the common fields of.
4407 * Returns an allocated array of fields. The last item in the array is NULL.
4408 * The array must be freed with free().
4410 struct format_field **pevent_event_common_fields(struct event_format *event)
4412 return get_event_fields("common", event->name,
4413 event->format.nr_common,
4414 event->format.common_fields);
4418 * pevent_event_fields - return a list of event specific fields for an event
4419 * @event: the event to return the fields of.
4421 * Returns an allocated array of fields. The last item in the array is NULL.
4422 * The array must be freed with free().
4424 struct format_field **pevent_event_fields(struct event_format *event)
4426 return get_event_fields("event", event->name,
4427 event->format.nr_fields,
4428 event->format.fields);
4431 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
4433 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
4435 trace_seq_puts(s, ", ");
4436 print_fields(s, field->next);
4441 static void print_args(struct print_arg *args)
4443 int print_paren = 1;
4446 switch (args->type) {
4451 printf("%s", args->atom.atom);
4454 printf("REC->%s", args->field.name);
4457 printf("__print_flags(");
4458 print_args(args->flags.field);
4459 printf(", %s, ", args->flags.delim);
4461 print_fields(&s, args->flags.flags);
4462 trace_seq_do_printf(&s);
4463 trace_seq_destroy(&s);
4467 printf("__print_symbolic(");
4468 print_args(args->symbol.field);
4471 print_fields(&s, args->symbol.symbols);
4472 trace_seq_do_printf(&s);
4473 trace_seq_destroy(&s);
4477 printf("__print_hex(");
4478 print_args(args->hex.field);
4480 print_args(args->hex.size);
4485 printf("__get_str(%s)", args->string.string);
4488 printf("(%s)", args->typecast.type);
4489 print_args(args->typecast.item);
4492 if (strcmp(args->op.op, ":") == 0)
4496 print_args(args->op.left);
4497 printf(" %s ", args->op.op);
4498 print_args(args->op.right);
4503 /* we should warn... */
4508 print_args(args->next);
4512 static void parse_header_field(const char *field,
4513 int *offset, int *size, int mandatory)
4515 unsigned long long save_input_buf_ptr;
4516 unsigned long long save_input_buf_siz;
4520 save_input_buf_ptr = input_buf_ptr;
4521 save_input_buf_siz = input_buf_siz;
4523 if (read_expected(EVENT_ITEM, "field") < 0)
4525 if (read_expected(EVENT_OP, ":") < 0)
4529 if (read_expect_type(EVENT_ITEM, &token) < 0)
4534 * If this is not a mandatory field, then test it first.
4537 if (read_expected(EVENT_ITEM, field) < 0)
4540 if (read_expect_type(EVENT_ITEM, &token) < 0)
4542 if (strcmp(token, field) != 0)
4547 if (read_expected(EVENT_OP, ";") < 0)
4549 if (read_expected(EVENT_ITEM, "offset") < 0)
4551 if (read_expected(EVENT_OP, ":") < 0)
4553 if (read_expect_type(EVENT_ITEM, &token) < 0)
4555 *offset = atoi(token);
4557 if (read_expected(EVENT_OP, ";") < 0)
4559 if (read_expected(EVENT_ITEM, "size") < 0)
4561 if (read_expected(EVENT_OP, ":") < 0)
4563 if (read_expect_type(EVENT_ITEM, &token) < 0)
4565 *size = atoi(token);
4567 if (read_expected(EVENT_OP, ";") < 0)
4569 type = read_token(&token);
4570 if (type != EVENT_NEWLINE) {
4571 /* newer versions of the kernel have a "signed" type */
4572 if (type != EVENT_ITEM)
4575 if (strcmp(token, "signed") != 0)
4580 if (read_expected(EVENT_OP, ":") < 0)
4583 if (read_expect_type(EVENT_ITEM, &token))
4587 if (read_expected(EVENT_OP, ";") < 0)
4590 if (read_expect_type(EVENT_NEWLINE, &token))
4598 input_buf_ptr = save_input_buf_ptr;
4599 input_buf_siz = save_input_buf_siz;
4606 * pevent_parse_header_page - parse the data stored in the header page
4607 * @pevent: the handle to the pevent
4608 * @buf: the buffer storing the header page format string
4609 * @size: the size of @buf
4610 * @long_size: the long size to use if there is no header
4612 * This parses the header page format for information on the
4613 * ring buffer used. The @buf should be copied from
4615 * /sys/kernel/debug/tracing/events/header_page
4617 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
4624 * Old kernels did not have header page info.
4625 * Sorry but we just use what we find here in user space.
4627 pevent->header_page_ts_size = sizeof(long long);
4628 pevent->header_page_size_size = long_size;
4629 pevent->header_page_data_offset = sizeof(long long) + long_size;
4630 pevent->old_format = 1;
4633 init_input_buf(buf, size);
4635 parse_header_field("timestamp", &pevent->header_page_ts_offset,
4636 &pevent->header_page_ts_size, 1);
4637 parse_header_field("commit", &pevent->header_page_size_offset,
4638 &pevent->header_page_size_size, 1);
4639 parse_header_field("overwrite", &pevent->header_page_overwrite,
4641 parse_header_field("data", &pevent->header_page_data_offset,
4642 &pevent->header_page_data_size, 1);
4647 static int event_matches(struct event_format *event,
4648 int id, const char *sys_name,
4649 const char *event_name)
4651 if (id >= 0 && id != event->id)
4654 if (event_name && (strcmp(event_name, event->name) != 0))
4657 if (sys_name && (strcmp(sys_name, event->system) != 0))
4663 static void free_handler(struct event_handler *handle)
4665 free((void *)handle->sys_name);
4666 free((void *)handle->event_name);
4670 static int find_event_handle(struct pevent *pevent, struct event_format *event)
4672 struct event_handler *handle, **next;
4674 for (next = &pevent->handlers; *next;
4675 next = &(*next)->next) {
4677 if (event_matches(event, handle->id,
4679 handle->event_name))
4686 pr_stat("overriding event (%d) %s:%s with new print handler",
4687 event->id, event->system, event->name);
4689 event->handler = handle->func;
4690 event->context = handle->context;
4692 *next = handle->next;
4693 free_handler(handle);
4699 * pevent_parse_event - parse the event format
4700 * @pevent: the handle to the pevent
4701 * @buf: the buffer storing the event format string
4702 * @size: the size of @buf
4703 * @sys: the system the event belongs to
4705 * This parses the event format and creates an event structure
4706 * to quickly parse raw data for a given event.
4708 * These files currently come from:
4710 * /sys/kernel/debug/tracing/events/.../.../format
4712 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
4713 unsigned long size, const char *sys)
4715 struct event_format *event;
4718 init_input_buf(buf, size);
4720 event = alloc_event();
4722 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
4724 event->name = event_read_name();
4727 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
4728 goto event_alloc_failed;
4731 if (strcmp(sys, "ftrace") == 0) {
4732 event->flags |= EVENT_FL_ISFTRACE;
4734 if (strcmp(event->name, "bprint") == 0)
4735 event->flags |= EVENT_FL_ISBPRINT;
4738 event->id = event_read_id();
4739 if (event->id < 0) {
4740 ret = PEVENT_ERRNO__READ_ID_FAILED;
4742 * This isn't an allocation error actually.
4743 * But as the ID is critical, just bail out.
4745 goto event_alloc_failed;
4748 event->system = strdup(sys);
4749 if (!event->system) {
4750 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
4751 goto event_alloc_failed;
4754 /* Add pevent to event so that it can be referenced */
4755 event->pevent = pevent;
4757 ret = event_read_format(event);
4759 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
4760 goto event_parse_failed;
4764 * If the event has an override, don't print warnings if the event
4765 * print format fails to parse.
4767 if (find_event_handle(pevent, event))
4770 ret = event_read_print(event);
4773 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
4774 goto event_parse_failed;
4778 add_event(pevent, event);
4780 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
4781 struct format_field *field;
4782 struct print_arg *arg, **list;
4784 /* old ftrace had no args */
4785 list = &event->print_fmt.args;
4786 for (field = event->format.fields; field; field = field->next) {
4788 arg->type = PRINT_FIELD;
4789 arg->field.name = strdup(field->name);
4790 if (!arg->field.name) {
4791 event->flags |= EVENT_FL_FAILED;
4793 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
4795 arg->field.field = field;
4802 #define PRINT_ARGS 0
4803 if (PRINT_ARGS && event->print_fmt.args)
4804 print_args(event->print_fmt.args);
4809 event->flags |= EVENT_FL_FAILED;
4810 /* still add it even if it failed */
4811 add_event(pevent, event);
4815 free(event->system);
4822 #define _PE(code, str) str
4823 static const char * const pevent_error_str[] = {
4828 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
4829 char *buf, size_t buflen)
4835 msg = strerror_r(errnum, buf, buflen);
4837 size_t len = strlen(msg);
4838 memcpy(buf, msg, min(buflen - 1, len));
4839 *(buf + min(buflen - 1, len)) = '\0';
4844 if (errnum <= __PEVENT_ERRNO__START ||
4845 errnum >= __PEVENT_ERRNO__END)
4848 idx = errnum - __PEVENT_ERRNO__START - 1;
4849 msg = pevent_error_str[idx];
4852 case PEVENT_ERRNO__MEM_ALLOC_FAILED:
4853 case PEVENT_ERRNO__PARSE_EVENT_FAILED:
4854 case PEVENT_ERRNO__READ_ID_FAILED:
4855 case PEVENT_ERRNO__READ_FORMAT_FAILED:
4856 case PEVENT_ERRNO__READ_PRINT_FAILED:
4857 case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED:
4858 snprintf(buf, buflen, "%s", msg);
4862 /* cannot reach here */
4869 int get_field_val(struct trace_seq *s, struct format_field *field,
4870 const char *name, struct pevent_record *record,
4871 unsigned long long *val, int err)
4875 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4879 if (pevent_read_number_field(field, record->data, val)) {
4881 trace_seq_printf(s, " %s=INVALID", name);
4889 * pevent_get_field_raw - return the raw pointer into the data field
4890 * @s: The seq to print to on error
4891 * @event: the event that the field is for
4892 * @name: The name of the field
4893 * @record: The record with the field name.
4894 * @len: place to store the field length.
4895 * @err: print default error if failed.
4897 * Returns a pointer into record->data of the field and places
4898 * the length of the field in @len.
4900 * On failure, it returns NULL.
4902 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
4903 const char *name, struct pevent_record *record,
4906 struct format_field *field;
4907 void *data = record->data;
4914 field = pevent_find_field(event, name);
4918 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4922 /* Allow @len to be NULL */
4926 offset = field->offset;
4927 if (field->flags & FIELD_IS_DYNAMIC) {
4928 offset = pevent_read_number(event->pevent,
4929 data + offset, field->size);
4930 *len = offset >> 16;
4935 return data + offset;
4939 * pevent_get_field_val - find a field and return its value
4940 * @s: The seq to print to on error
4941 * @event: the event that the field is for
4942 * @name: The name of the field
4943 * @record: The record with the field name.
4944 * @val: place to store the value of the field.
4945 * @err: print default error if failed.
4947 * Returns 0 on success -1 on field not found.
4949 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
4950 const char *name, struct pevent_record *record,
4951 unsigned long long *val, int err)
4953 struct format_field *field;
4958 field = pevent_find_field(event, name);
4960 return get_field_val(s, field, name, record, val, err);
4964 * pevent_get_common_field_val - find a common field and return its value
4965 * @s: The seq to print to on error
4966 * @event: the event that the field is for
4967 * @name: The name of the field
4968 * @record: The record with the field name.
4969 * @val: place to store the value of the field.
4970 * @err: print default error if failed.
4972 * Returns 0 on success -1 on field not found.
4974 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
4975 const char *name, struct pevent_record *record,
4976 unsigned long long *val, int err)
4978 struct format_field *field;
4983 field = pevent_find_common_field(event, name);
4985 return get_field_val(s, field, name, record, val, err);
4989 * pevent_get_any_field_val - find a any field and return its value
4990 * @s: The seq to print to on error
4991 * @event: the event that the field is for
4992 * @name: The name of the field
4993 * @record: The record with the field name.
4994 * @val: place to store the value of the field.
4995 * @err: print default error if failed.
4997 * Returns 0 on success -1 on field not found.
4999 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
5000 const char *name, struct pevent_record *record,
5001 unsigned long long *val, int err)
5003 struct format_field *field;
5008 field = pevent_find_any_field(event, name);
5010 return get_field_val(s, field, name, record, val, err);
5014 * pevent_print_num_field - print a field and a format
5015 * @s: The seq to print to
5016 * @fmt: The printf format to print the field with.
5017 * @event: the event that the field is for
5018 * @name: The name of the field
5019 * @record: The record with the field name.
5020 * @err: print default error if failed.
5022 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
5024 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
5025 struct event_format *event, const char *name,
5026 struct pevent_record *record, int err)
5028 struct format_field *field = pevent_find_field(event, name);
5029 unsigned long long val;
5034 if (pevent_read_number_field(field, record->data, &val))
5037 return trace_seq_printf(s, fmt, val);
5041 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
5045 static void free_func_handle(struct pevent_function_handler *func)
5047 struct pevent_func_params *params;
5051 while (func->params) {
5052 params = func->params;
5053 func->params = params->next;
5061 * pevent_register_print_function - register a helper function
5062 * @pevent: the handle to the pevent
5063 * @func: the function to process the helper function
5064 * @ret_type: the return type of the helper function
5065 * @name: the name of the helper function
5066 * @parameters: A list of enum pevent_func_arg_type
5068 * Some events may have helper functions in the print format arguments.
5069 * This allows a plugin to dynamically create a way to process one
5070 * of these functions.
5072 * The @parameters is a variable list of pevent_func_arg_type enums that
5073 * must end with PEVENT_FUNC_ARG_VOID.
5075 int pevent_register_print_function(struct pevent *pevent,
5076 pevent_func_handler func,
5077 enum pevent_func_arg_type ret_type,
5080 struct pevent_function_handler *func_handle;
5081 struct pevent_func_params **next_param;
5082 struct pevent_func_params *param;
5083 enum pevent_func_arg_type type;
5087 func_handle = find_func_handler(pevent, name);
5090 * This is most like caused by the users own
5091 * plugins updating the function. This overrides the
5094 pr_stat("override of function helper '%s'", name);
5095 remove_func_handler(pevent, name);
5098 func_handle = malloc(sizeof(*func_handle));
5100 do_warning("Failed to allocate function handler");
5101 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5103 memset(func_handle, 0, sizeof(*func_handle));
5105 func_handle->ret_type = ret_type;
5106 func_handle->name = strdup(name);
5107 func_handle->func = func;
5108 if (!func_handle->name) {
5109 do_warning("Failed to allocate function name");
5111 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5114 next_param = &(func_handle->params);
5117 type = va_arg(ap, enum pevent_func_arg_type);
5118 if (type == PEVENT_FUNC_ARG_VOID)
5121 if (type < 0 || type >= PEVENT_FUNC_ARG_MAX_TYPES) {
5122 do_warning("Invalid argument type %d", type);
5123 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
5127 param = malloc(sizeof(*param));
5129 do_warning("Failed to allocate function param");
5130 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5136 *next_param = param;
5137 next_param = &(param->next);
5139 func_handle->nr_args++;
5143 func_handle->next = pevent->func_handlers;
5144 pevent->func_handlers = func_handle;
5149 free_func_handle(func_handle);
5154 * pevent_register_event_handler - register a way to parse an event
5155 * @pevent: the handle to the pevent
5156 * @id: the id of the event to register
5157 * @sys_name: the system name the event belongs to
5158 * @event_name: the name of the event
5159 * @func: the function to call to parse the event information
5160 * @context: the data to be passed to @func
5162 * This function allows a developer to override the parsing of
5163 * a given event. If for some reason the default print format
5164 * is not sufficient, this function will register a function
5165 * for an event to be used to parse the data instead.
5167 * If @id is >= 0, then it is used to find the event.
5168 * else @sys_name and @event_name are used.
5170 int pevent_register_event_handler(struct pevent *pevent,
5171 int id, char *sys_name, char *event_name,
5172 pevent_event_handler_func func,
5175 struct event_format *event;
5176 struct event_handler *handle;
5180 event = pevent_find_event(pevent, id);
5183 if (event_name && (strcmp(event_name, event->name) != 0))
5185 if (sys_name && (strcmp(sys_name, event->system) != 0))
5188 event = pevent_find_event_by_name(pevent, sys_name, event_name);
5193 pr_stat("overriding event (%d) %s:%s with new print handler",
5194 event->id, event->system, event->name);
5196 event->handler = func;
5197 event->context = context;
5201 /* Save for later use. */
5202 handle = malloc(sizeof(*handle));
5204 do_warning("Failed to allocate event handler");
5205 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5208 memset(handle, 0, sizeof(*handle));
5211 handle->event_name = strdup(event_name);
5213 handle->sys_name = strdup(sys_name);
5215 if ((event_name && !handle->event_name) ||
5216 (sys_name && !handle->sys_name)) {
5217 do_warning("Failed to allocate event/sys name");
5218 free((void *)handle->event_name);
5219 free((void *)handle->sys_name);
5221 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5224 handle->func = func;
5225 handle->next = pevent->handlers;
5226 pevent->handlers = handle;
5227 handle->context = context;
5233 * pevent_alloc - create a pevent handle
5235 struct pevent *pevent_alloc(void)
5237 struct pevent *pevent;
5239 pevent = malloc(sizeof(*pevent));
5242 memset(pevent, 0, sizeof(*pevent));
5243 pevent->ref_count = 1;
5248 void pevent_ref(struct pevent *pevent)
5250 pevent->ref_count++;
5253 static void free_format_fields(struct format_field *field)
5255 struct format_field *next;
5266 static void free_formats(struct format *format)
5268 free_format_fields(format->common_fields);
5269 free_format_fields(format->fields);
5272 static void free_event(struct event_format *event)
5275 free(event->system);
5277 free_formats(&event->format);
5279 free(event->print_fmt.format);
5280 free_args(event->print_fmt.args);
5286 * pevent_free - free a pevent handle
5287 * @pevent: the pevent handle to free
5289 void pevent_free(struct pevent *pevent)
5291 struct cmdline_list *cmdlist, *cmdnext;
5292 struct func_list *funclist, *funcnext;
5293 struct printk_list *printklist, *printknext;
5294 struct pevent_function_handler *func_handler;
5295 struct event_handler *handle;
5301 cmdlist = pevent->cmdlist;
5302 funclist = pevent->funclist;
5303 printklist = pevent->printklist;
5305 pevent->ref_count--;
5306 if (pevent->ref_count)
5309 if (pevent->cmdlines) {
5310 for (i = 0; i < pevent->cmdline_count; i++)
5311 free(pevent->cmdlines[i].comm);
5312 free(pevent->cmdlines);
5316 cmdnext = cmdlist->next;
5317 free(cmdlist->comm);
5322 if (pevent->func_map) {
5323 for (i = 0; i < pevent->func_count; i++) {
5324 free(pevent->func_map[i].func);
5325 free(pevent->func_map[i].mod);
5327 free(pevent->func_map);
5331 funcnext = funclist->next;
5332 free(funclist->func);
5333 free(funclist->mod);
5335 funclist = funcnext;
5338 while (pevent->func_handlers) {
5339 func_handler = pevent->func_handlers;
5340 pevent->func_handlers = func_handler->next;
5341 free_func_handle(func_handler);
5344 if (pevent->printk_map) {
5345 for (i = 0; i < pevent->printk_count; i++)
5346 free(pevent->printk_map[i].printk);
5347 free(pevent->printk_map);
5350 while (printklist) {
5351 printknext = printklist->next;
5352 free(printklist->printk);
5354 printklist = printknext;
5357 for (i = 0; i < pevent->nr_events; i++)
5358 free_event(pevent->events[i]);
5360 while (pevent->handlers) {
5361 handle = pevent->handlers;
5362 pevent->handlers = handle->next;
5363 free_handler(handle);
5366 free(pevent->events);
5367 free(pevent->sort_events);
5372 void pevent_unref(struct pevent *pevent)
5374 pevent_free(pevent);