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, see <http://www.gnu.org/licenses>
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 * The parts for function graph printing was taken and modified from the
21 * Linux Kernel that were written by
22 * - Copyright (C) 2009 Frederic Weisbecker,
23 * Frederic Weisbecker gave his permission to relicense the code to
24 * the Lesser General Public License.
35 #include "event-parse.h"
36 #include "event-utils.h"
38 static const char *input_buf;
39 static unsigned long long input_buf_ptr;
40 static unsigned long long input_buf_siz;
42 static int is_flag_field;
43 static int is_symbolic_field;
45 static int show_warning = 1;
47 #define do_warning(fmt, ...) \
50 warning(fmt, ##__VA_ARGS__); \
53 static void init_input_buf(const char *buf, unsigned long long size)
60 const char *pevent_get_input_buf(void)
65 unsigned long long pevent_get_input_buf_ptr(void)
70 struct event_handler {
71 struct event_handler *next;
74 const char *event_name;
75 pevent_event_handler_func func;
79 struct pevent_func_params {
80 struct pevent_func_params *next;
81 enum pevent_func_arg_type type;
84 struct pevent_function_handler {
85 struct pevent_function_handler *next;
86 enum pevent_func_arg_type ret_type;
88 pevent_func_handler func;
89 struct pevent_func_params *params;
93 static unsigned long long
94 process_defined_func(struct trace_seq *s, void *data, int size,
95 struct event_format *event, struct print_arg *arg);
97 static void free_func_handle(struct pevent_function_handler *func);
100 * pevent_buffer_init - init buffer for parsing
101 * @buf: buffer to parse
102 * @size: the size of the buffer
104 * For use with pevent_read_token(), this initializes the internal
105 * buffer that pevent_read_token() will parse.
107 void pevent_buffer_init(const char *buf, unsigned long long size)
109 init_input_buf(buf, size);
112 void breakpoint(void)
118 struct print_arg *alloc_arg(void)
120 return calloc(1, sizeof(struct print_arg));
128 static int cmdline_cmp(const void *a, const void *b)
130 const struct cmdline *ca = a;
131 const struct cmdline *cb = b;
133 if (ca->pid < cb->pid)
135 if (ca->pid > cb->pid)
141 struct cmdline_list {
142 struct cmdline_list *next;
147 static int cmdline_init(struct pevent *pevent)
149 struct cmdline_list *cmdlist = pevent->cmdlist;
150 struct cmdline_list *item;
151 struct cmdline *cmdlines;
154 cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
160 cmdlines[i].pid = cmdlist->pid;
161 cmdlines[i].comm = cmdlist->comm;
164 cmdlist = cmdlist->next;
168 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
170 pevent->cmdlines = cmdlines;
171 pevent->cmdlist = NULL;
176 static const char *find_cmdline(struct pevent *pevent, int pid)
178 const struct cmdline *comm;
184 if (!pevent->cmdlines && cmdline_init(pevent))
185 return "<not enough memory for cmdlines!>";
189 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
190 sizeof(*pevent->cmdlines), cmdline_cmp);
198 * pevent_pid_is_registered - return if a pid has a cmdline registered
199 * @pevent: handle for the pevent
200 * @pid: The pid to check if it has a cmdline registered with.
202 * Returns 1 if the pid has a cmdline mapped to it
205 int pevent_pid_is_registered(struct pevent *pevent, int pid)
207 const struct cmdline *comm;
213 if (!pevent->cmdlines && cmdline_init(pevent))
218 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
219 sizeof(*pevent->cmdlines), cmdline_cmp);
227 * If the command lines have been converted to an array, then
228 * we must add this pid. This is much slower than when cmdlines
229 * are added before the array is initialized.
231 static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
233 struct cmdline *cmdlines = pevent->cmdlines;
234 const struct cmdline *cmdline;
240 /* avoid duplicates */
243 cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
244 sizeof(*pevent->cmdlines), cmdline_cmp);
250 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
256 cmdlines[pevent->cmdline_count].comm = strdup(comm);
257 if (!cmdlines[pevent->cmdline_count].comm) {
263 cmdlines[pevent->cmdline_count].pid = pid;
265 if (cmdlines[pevent->cmdline_count].comm)
266 pevent->cmdline_count++;
268 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
269 pevent->cmdlines = cmdlines;
275 * pevent_register_comm - register a pid / comm mapping
276 * @pevent: handle for the pevent
277 * @comm: the command line to register
278 * @pid: the pid to map the command line to
280 * This adds a mapping to search for command line names with
281 * a given pid. The comm is duplicated.
283 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
285 struct cmdline_list *item;
287 if (pevent->cmdlines)
288 return add_new_comm(pevent, comm, pid);
290 item = malloc(sizeof(*item));
294 item->comm = strdup(comm);
300 item->next = pevent->cmdlist;
302 pevent->cmdlist = item;
303 pevent->cmdline_count++;
309 unsigned long long addr;
315 struct func_list *next;
316 unsigned long long addr;
321 static int func_cmp(const void *a, const void *b)
323 const struct func_map *fa = a;
324 const struct func_map *fb = b;
326 if (fa->addr < fb->addr)
328 if (fa->addr > fb->addr)
335 * We are searching for a record in between, not an exact
338 static int func_bcmp(const void *a, const void *b)
340 const struct func_map *fa = a;
341 const struct func_map *fb = b;
343 if ((fa->addr == fb->addr) ||
345 (fa->addr > fb->addr &&
346 fa->addr < (fb+1)->addr))
349 if (fa->addr < fb->addr)
355 static int func_map_init(struct pevent *pevent)
357 struct func_list *funclist;
358 struct func_list *item;
359 struct func_map *func_map;
362 func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
366 funclist = pevent->funclist;
370 func_map[i].func = funclist->func;
371 func_map[i].addr = funclist->addr;
372 func_map[i].mod = funclist->mod;
375 funclist = funclist->next;
379 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
382 * Add a special record at the end.
384 func_map[pevent->func_count].func = NULL;
385 func_map[pevent->func_count].addr = 0;
386 func_map[pevent->func_count].mod = NULL;
388 pevent->func_map = func_map;
389 pevent->funclist = NULL;
394 static struct func_map *
395 find_func(struct pevent *pevent, unsigned long long addr)
397 struct func_map *func;
400 if (!pevent->func_map)
401 func_map_init(pevent);
405 func = bsearch(&key, pevent->func_map, pevent->func_count,
406 sizeof(*pevent->func_map), func_bcmp);
412 * pevent_find_function - find a function by a given address
413 * @pevent: handle for the pevent
414 * @addr: the address to find the function with
416 * Returns a pointer to the function stored that has the given
417 * address. Note, the address does not have to be exact, it
418 * will select the function that would contain the address.
420 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
422 struct func_map *map;
424 map = find_func(pevent, addr);
432 * pevent_find_function_address - find a function address by a given address
433 * @pevent: handle for the pevent
434 * @addr: the address to find the function with
436 * Returns the address the function starts at. This can be used in
437 * conjunction with pevent_find_function to print both the function
438 * name and the function offset.
441 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
443 struct func_map *map;
445 map = find_func(pevent, addr);
453 * pevent_register_function - register a function with a given address
454 * @pevent: handle for the pevent
455 * @function: the function name to register
456 * @addr: the address the function starts at
457 * @mod: the kernel module the function may be in (NULL for none)
459 * This registers a function name with an address and module.
460 * The @func passed in is duplicated.
462 int pevent_register_function(struct pevent *pevent, char *func,
463 unsigned long long addr, char *mod)
465 struct func_list *item = malloc(sizeof(*item));
470 item->next = pevent->funclist;
471 item->func = strdup(func);
476 item->mod = strdup(mod);
483 pevent->funclist = item;
484 pevent->func_count++;
498 * pevent_print_funcs - print out the stored functions
499 * @pevent: handle for the pevent
501 * This prints out the stored functions.
503 void pevent_print_funcs(struct pevent *pevent)
507 if (!pevent->func_map)
508 func_map_init(pevent);
510 for (i = 0; i < (int)pevent->func_count; i++) {
512 pevent->func_map[i].addr,
513 pevent->func_map[i].func);
514 if (pevent->func_map[i].mod)
515 printf(" [%s]\n", pevent->func_map[i].mod);
522 unsigned long long addr;
527 struct printk_list *next;
528 unsigned long long addr;
532 static int printk_cmp(const void *a, const void *b)
534 const struct printk_map *pa = a;
535 const struct printk_map *pb = b;
537 if (pa->addr < pb->addr)
539 if (pa->addr > pb->addr)
545 static int printk_map_init(struct pevent *pevent)
547 struct printk_list *printklist;
548 struct printk_list *item;
549 struct printk_map *printk_map;
552 printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
556 printklist = pevent->printklist;
560 printk_map[i].printk = printklist->printk;
561 printk_map[i].addr = printklist->addr;
564 printklist = printklist->next;
568 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
570 pevent->printk_map = printk_map;
571 pevent->printklist = NULL;
576 static struct printk_map *
577 find_printk(struct pevent *pevent, unsigned long long addr)
579 struct printk_map *printk;
580 struct printk_map key;
582 if (!pevent->printk_map && printk_map_init(pevent))
587 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
588 sizeof(*pevent->printk_map), printk_cmp);
594 * pevent_register_print_string - register a string by its address
595 * @pevent: handle for the pevent
596 * @fmt: the string format to register
597 * @addr: the address the string was located at
599 * This registers a string by the address it was stored in the kernel.
600 * The @fmt passed in is duplicated.
602 int pevent_register_print_string(struct pevent *pevent, char *fmt,
603 unsigned long long addr)
605 struct printk_list *item = malloc(sizeof(*item));
610 item->next = pevent->printklist;
613 item->printk = strdup(fmt);
617 pevent->printklist = item;
618 pevent->printk_count++;
629 * pevent_print_printk - print out the stored strings
630 * @pevent: handle for the pevent
632 * This prints the string formats that were stored.
634 void pevent_print_printk(struct pevent *pevent)
638 if (!pevent->printk_map)
639 printk_map_init(pevent);
641 for (i = 0; i < (int)pevent->printk_count; i++) {
642 printf("%016llx %s\n",
643 pevent->printk_map[i].addr,
644 pevent->printk_map[i].printk);
648 static struct event_format *alloc_event(void)
650 return calloc(1, sizeof(struct event_format));
653 static int add_event(struct pevent *pevent, struct event_format *event)
656 struct event_format **events = realloc(pevent->events, sizeof(event) *
657 (pevent->nr_events + 1));
661 pevent->events = events;
663 for (i = 0; i < pevent->nr_events; i++) {
664 if (pevent->events[i]->id > event->id)
667 if (i < pevent->nr_events)
668 memmove(&pevent->events[i + 1],
670 sizeof(event) * (pevent->nr_events - i));
672 pevent->events[i] = event;
675 event->pevent = pevent;
680 static int event_item_type(enum event_type type)
683 case EVENT_ITEM ... EVENT_SQUOTE:
685 case EVENT_ERROR ... EVENT_DELIM:
691 static void free_flag_sym(struct print_flag_sym *fsym)
693 struct print_flag_sym *next;
704 static void free_arg(struct print_arg *arg)
706 struct print_arg *farg;
713 free(arg->atom.atom);
716 free(arg->field.name);
719 free_arg(arg->flags.field);
720 free(arg->flags.delim);
721 free_flag_sym(arg->flags.flags);
724 free_arg(arg->symbol.field);
725 free_flag_sym(arg->symbol.symbols);
728 free_arg(arg->hex.field);
729 free_arg(arg->hex.size);
732 free(arg->typecast.type);
733 free_arg(arg->typecast.item);
737 free(arg->string.string);
739 case PRINT_DYNAMIC_ARRAY:
740 free(arg->dynarray.index);
744 free_arg(arg->op.left);
745 free_arg(arg->op.right);
748 while (arg->func.args) {
749 farg = arg->func.args;
750 arg->func.args = farg->next;
763 static enum event_type get_type(int ch)
766 return EVENT_NEWLINE;
769 if (isalnum(ch) || ch == '_')
777 if (ch == '(' || ch == ')' || ch == ',')
783 static int __read_char(void)
785 if (input_buf_ptr >= input_buf_siz)
788 return input_buf[input_buf_ptr++];
791 static int __peek_char(void)
793 if (input_buf_ptr >= input_buf_siz)
796 return input_buf[input_buf_ptr];
800 * pevent_peek_char - peek at the next character that will be read
802 * Returns the next character read, or -1 if end of buffer.
804 int pevent_peek_char(void)
806 return __peek_char();
809 static int extend_token(char **tok, char *buf, int size)
811 char *newtok = realloc(*tok, size);
828 static enum event_type force_token(const char *str, char **tok);
830 static enum event_type __read_token(char **tok)
833 int ch, last_ch, quote_ch, next_ch;
836 enum event_type type;
846 if (type == EVENT_NONE)
854 if (asprintf(tok, "%c", ch) < 0)
862 next_ch = __peek_char();
863 if (next_ch == '>') {
864 buf[i++] = __read_char();
877 buf[i++] = __read_char();
889 default: /* what should we do instead? */
899 buf[i++] = __read_char();
904 /* don't keep quotes */
910 if (i == (BUFSIZ - 1)) {
914 if (extend_token(tok, buf, tok_size) < 0)
921 /* the '\' '\' will cancel itself */
922 if (ch == '\\' && last_ch == '\\')
924 } while (ch != quote_ch || last_ch == '\\');
925 /* remove the last quote */
929 * For strings (double quotes) check the next token.
930 * If it is another string, concatinate the two.
932 if (type == EVENT_DQUOTE) {
933 unsigned long long save_input_buf_ptr = input_buf_ptr;
937 } while (isspace(ch));
940 input_buf_ptr = save_input_buf_ptr;
945 case EVENT_ERROR ... EVENT_SPACE:
951 while (get_type(__peek_char()) == type) {
952 if (i == (BUFSIZ - 1)) {
956 if (extend_token(tok, buf, tok_size) < 0)
966 if (extend_token(tok, buf, tok_size + i + 1) < 0)
969 if (type == EVENT_ITEM) {
971 * Older versions of the kernel has a bug that
972 * creates invalid symbols and will break the mac80211
973 * parsing. This is a work around to that bug.
975 * See Linux kernel commit:
976 * 811cb50baf63461ce0bdb234927046131fc7fa8b
978 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
981 return force_token("\"\%s\" ", tok);
982 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
985 return force_token("\" sta:%pM\" ", tok);
986 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
989 return force_token("\" vif:%p(%d)\" ", tok);
996 static enum event_type force_token(const char *str, char **tok)
998 const char *save_input_buf;
999 unsigned long long save_input_buf_ptr;
1000 unsigned long long save_input_buf_siz;
1001 enum event_type type;
1003 /* save off the current input pointers */
1004 save_input_buf = input_buf;
1005 save_input_buf_ptr = input_buf_ptr;
1006 save_input_buf_siz = input_buf_siz;
1008 init_input_buf(str, strlen(str));
1010 type = __read_token(tok);
1012 /* reset back to original token */
1013 input_buf = save_input_buf;
1014 input_buf_ptr = save_input_buf_ptr;
1015 input_buf_siz = save_input_buf_siz;
1020 static void free_token(char *tok)
1026 static enum event_type read_token(char **tok)
1028 enum event_type type;
1031 type = __read_token(tok);
1032 if (type != EVENT_SPACE)
1044 * pevent_read_token - access to utilites to use the pevent parser
1045 * @tok: The token to return
1047 * This will parse tokens from the string given by
1048 * pevent_init_data().
1050 * Returns the token type.
1052 enum event_type pevent_read_token(char **tok)
1054 return read_token(tok);
1058 * pevent_free_token - free a token returned by pevent_read_token
1059 * @token: the token to free
1061 void pevent_free_token(char *token)
1067 static enum event_type read_token_item(char **tok)
1069 enum event_type type;
1072 type = __read_token(tok);
1073 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1084 static int test_type(enum event_type type, enum event_type expect)
1086 if (type != expect) {
1087 do_warning("Error: expected type %d but read %d",
1094 static int test_type_token(enum event_type type, const char *token,
1095 enum event_type expect, const char *expect_tok)
1097 if (type != expect) {
1098 do_warning("Error: expected type %d but read %d",
1103 if (strcmp(token, expect_tok) != 0) {
1104 do_warning("Error: expected '%s' but read '%s'",
1111 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1113 enum event_type type;
1116 type = read_token(tok);
1118 type = read_token_item(tok);
1119 return test_type(type, expect);
1122 static int read_expect_type(enum event_type expect, char **tok)
1124 return __read_expect_type(expect, tok, 1);
1127 static int __read_expected(enum event_type expect, const char *str,
1130 enum event_type type;
1135 type = read_token(&token);
1137 type = read_token_item(&token);
1139 ret = test_type_token(type, token, expect, str);
1146 static int read_expected(enum event_type expect, const char *str)
1148 return __read_expected(expect, str, 1);
1151 static int read_expected_item(enum event_type expect, const char *str)
1153 return __read_expected(expect, str, 0);
1156 static char *event_read_name(void)
1160 if (read_expected(EVENT_ITEM, "name") < 0)
1163 if (read_expected(EVENT_OP, ":") < 0)
1166 if (read_expect_type(EVENT_ITEM, &token) < 0)
1176 static int event_read_id(void)
1181 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1184 if (read_expected(EVENT_OP, ":") < 0)
1187 if (read_expect_type(EVENT_ITEM, &token) < 0)
1190 id = strtoul(token, NULL, 0);
1199 static int field_is_string(struct format_field *field)
1201 if ((field->flags & FIELD_IS_ARRAY) &&
1202 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1203 strstr(field->type, "s8")))
1209 static int field_is_dynamic(struct format_field *field)
1211 if (strncmp(field->type, "__data_loc", 10) == 0)
1217 static int field_is_long(struct format_field *field)
1219 /* includes long long */
1220 if (strstr(field->type, "long"))
1226 static unsigned int type_size(const char *name)
1228 /* This covers all FIELD_IS_STRING types. */
1246 for (i = 0; table[i].type; i++) {
1247 if (!strcmp(table[i].type, name))
1248 return table[i].size;
1254 static int event_read_fields(struct event_format *event, struct format_field **fields)
1256 struct format_field *field = NULL;
1257 enum event_type type;
1263 unsigned int size_dynamic = 0;
1265 type = read_token(&token);
1266 if (type == EVENT_NEWLINE) {
1273 if (test_type_token(type, token, EVENT_ITEM, "field"))
1277 type = read_token(&token);
1279 * The ftrace fields may still use the "special" name.
1282 if (event->flags & EVENT_FL_ISFTRACE &&
1283 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1285 type = read_token(&token);
1288 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1292 if (read_expect_type(EVENT_ITEM, &token) < 0)
1297 field = calloc(1, sizeof(*field));
1301 field->event = event;
1303 /* read the rest of the type */
1305 type = read_token(&token);
1306 if (type == EVENT_ITEM ||
1307 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1309 * Some of the ftrace fields are broken and have
1310 * an illegal "." in them.
1312 (event->flags & EVENT_FL_ISFTRACE &&
1313 type == EVENT_OP && strcmp(token, ".") == 0)) {
1315 if (strcmp(token, "*") == 0)
1316 field->flags |= FIELD_IS_POINTER;
1320 new_type = realloc(field->type,
1321 strlen(field->type) +
1322 strlen(last_token) + 2);
1327 field->type = new_type;
1328 strcat(field->type, " ");
1329 strcat(field->type, last_token);
1332 field->type = last_token;
1341 do_warning("%s: no type found", __func__);
1344 field->name = last_token;
1346 if (test_type(type, EVENT_OP))
1349 if (strcmp(token, "[") == 0) {
1350 enum event_type last_type = type;
1351 char *brackets = token;
1355 field->flags |= FIELD_IS_ARRAY;
1357 type = read_token(&token);
1359 if (type == EVENT_ITEM)
1360 field->arraylen = strtoul(token, NULL, 0);
1362 field->arraylen = 0;
1364 while (strcmp(token, "]") != 0) {
1365 if (last_type == EVENT_ITEM &&
1372 new_brackets = realloc(brackets,
1374 strlen(token) + len);
1375 if (!new_brackets) {
1379 brackets = new_brackets;
1381 strcat(brackets, " ");
1382 strcat(brackets, token);
1383 /* We only care about the last token */
1384 field->arraylen = strtoul(token, NULL, 0);
1386 type = read_token(&token);
1387 if (type == EVENT_NONE) {
1388 do_warning("failed to find token");
1395 new_brackets = realloc(brackets, strlen(brackets) + 2);
1396 if (!new_brackets) {
1400 brackets = new_brackets;
1401 strcat(brackets, "]");
1403 /* add brackets to type */
1405 type = read_token(&token);
1407 * If the next token is not an OP, then it is of
1408 * the format: type [] item;
1410 if (type == EVENT_ITEM) {
1412 new_type = realloc(field->type,
1413 strlen(field->type) +
1414 strlen(field->name) +
1415 strlen(brackets) + 2);
1420 field->type = new_type;
1421 strcat(field->type, " ");
1422 strcat(field->type, field->name);
1423 size_dynamic = type_size(field->name);
1424 free_token(field->name);
1425 strcat(field->type, brackets);
1426 field->name = token;
1427 type = read_token(&token);
1430 new_type = realloc(field->type,
1431 strlen(field->type) +
1432 strlen(brackets) + 1);
1437 field->type = new_type;
1438 strcat(field->type, brackets);
1443 if (field_is_string(field))
1444 field->flags |= FIELD_IS_STRING;
1445 if (field_is_dynamic(field))
1446 field->flags |= FIELD_IS_DYNAMIC;
1447 if (field_is_long(field))
1448 field->flags |= FIELD_IS_LONG;
1450 if (test_type_token(type, token, EVENT_OP, ";"))
1454 if (read_expected(EVENT_ITEM, "offset") < 0)
1457 if (read_expected(EVENT_OP, ":") < 0)
1460 if (read_expect_type(EVENT_ITEM, &token))
1462 field->offset = strtoul(token, NULL, 0);
1465 if (read_expected(EVENT_OP, ";") < 0)
1468 if (read_expected(EVENT_ITEM, "size") < 0)
1471 if (read_expected(EVENT_OP, ":") < 0)
1474 if (read_expect_type(EVENT_ITEM, &token))
1476 field->size = strtoul(token, NULL, 0);
1479 if (read_expected(EVENT_OP, ";") < 0)
1482 type = read_token(&token);
1483 if (type != EVENT_NEWLINE) {
1484 /* newer versions of the kernel have a "signed" type */
1485 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1490 if (read_expected(EVENT_OP, ":") < 0)
1493 if (read_expect_type(EVENT_ITEM, &token))
1496 if (strtoul(token, NULL, 0))
1497 field->flags |= FIELD_IS_SIGNED;
1500 if (read_expected(EVENT_OP, ";") < 0)
1503 if (read_expect_type(EVENT_NEWLINE, &token))
1509 if (field->flags & FIELD_IS_ARRAY) {
1510 if (field->arraylen)
1511 field->elementsize = field->size / field->arraylen;
1512 else if (field->flags & FIELD_IS_DYNAMIC)
1513 field->elementsize = size_dynamic;
1514 else if (field->flags & FIELD_IS_STRING)
1515 field->elementsize = 1;
1516 else if (field->flags & FIELD_IS_LONG)
1517 field->elementsize = event->pevent ?
1518 event->pevent->long_size :
1521 field->elementsize = field->size;
1524 fields = &field->next;
1541 static int event_read_format(struct event_format *event)
1546 if (read_expected_item(EVENT_ITEM, "format") < 0)
1549 if (read_expected(EVENT_OP, ":") < 0)
1552 if (read_expect_type(EVENT_NEWLINE, &token))
1556 ret = event_read_fields(event, &event->format.common_fields);
1559 event->format.nr_common = ret;
1561 ret = event_read_fields(event, &event->format.fields);
1564 event->format.nr_fields = ret;
1573 static enum event_type
1574 process_arg_token(struct event_format *event, struct print_arg *arg,
1575 char **tok, enum event_type type);
1577 static enum event_type
1578 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1580 enum event_type type;
1583 type = read_token(&token);
1586 return process_arg_token(event, arg, tok, type);
1589 static enum event_type
1590 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1592 static enum event_type
1593 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1595 struct print_arg *arg, *left, *right;
1596 enum event_type type;
1601 right = alloc_arg();
1603 if (!arg || !left || !right) {
1604 do_warning("%s: not enough memory!", __func__);
1605 /* arg will be freed at out_free */
1611 arg->type = PRINT_OP;
1612 arg->op.left = left;
1613 arg->op.right = right;
1616 type = process_arg(event, left, &token);
1619 /* Handle other operations in the arguments */
1620 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1621 type = process_op(event, left, &token);
1625 if (test_type_token(type, token, EVENT_OP, ":"))
1630 type = process_arg(event, right, &token);
1632 top->op.right = arg;
1638 /* Top may point to itself */
1639 top->op.right = NULL;
1645 static enum event_type
1646 process_array(struct event_format *event, struct print_arg *top, char **tok)
1648 struct print_arg *arg;
1649 enum event_type type;
1654 do_warning("%s: not enough memory!", __func__);
1655 /* '*tok' is set to top->op.op. No need to free. */
1661 type = process_arg(event, arg, &token);
1662 if (test_type_token(type, token, EVENT_OP, "]"))
1665 top->op.right = arg;
1668 type = read_token_item(&token);
1679 static int get_op_prio(char *op)
1693 /* '>>' and '<<' are 8 */
1697 /* '==' and '!=' are 10 */
1707 do_warning("unknown op '%c'", op[0]);
1711 if (strcmp(op, "++") == 0 ||
1712 strcmp(op, "--") == 0) {
1714 } else if (strcmp(op, ">>") == 0 ||
1715 strcmp(op, "<<") == 0) {
1717 } else if (strcmp(op, ">=") == 0 ||
1718 strcmp(op, "<=") == 0) {
1720 } else if (strcmp(op, "==") == 0 ||
1721 strcmp(op, "!=") == 0) {
1723 } else if (strcmp(op, "&&") == 0) {
1725 } else if (strcmp(op, "||") == 0) {
1728 do_warning("unknown op '%s'", op);
1734 static int set_op_prio(struct print_arg *arg)
1737 /* single ops are the greatest */
1738 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1741 arg->op.prio = get_op_prio(arg->op.op);
1743 return arg->op.prio;
1746 /* Note, *tok does not get freed, but will most likely be saved */
1747 static enum event_type
1748 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1750 struct print_arg *left, *right = NULL;
1751 enum event_type type;
1754 /* the op is passed in via tok */
1757 if (arg->type == PRINT_OP && !arg->op.left) {
1758 /* handle single op */
1760 do_warning("bad op token %s", token);
1770 do_warning("bad op token %s", token);
1775 /* make an empty left */
1780 left->type = PRINT_NULL;
1781 arg->op.left = left;
1783 right = alloc_arg();
1787 arg->op.right = right;
1789 /* do not free the token, it belongs to an op */
1791 type = process_arg(event, right, tok);
1793 } else if (strcmp(token, "?") == 0) {
1799 /* copy the top arg to the left */
1802 arg->type = PRINT_OP;
1804 arg->op.left = left;
1807 /* it will set arg->op.right */
1808 type = process_cond(event, arg, tok);
1810 } else if (strcmp(token, ">>") == 0 ||
1811 strcmp(token, "<<") == 0 ||
1812 strcmp(token, "&") == 0 ||
1813 strcmp(token, "|") == 0 ||
1814 strcmp(token, "&&") == 0 ||
1815 strcmp(token, "||") == 0 ||
1816 strcmp(token, "-") == 0 ||
1817 strcmp(token, "+") == 0 ||
1818 strcmp(token, "*") == 0 ||
1819 strcmp(token, "^") == 0 ||
1820 strcmp(token, "/") == 0 ||
1821 strcmp(token, "<") == 0 ||
1822 strcmp(token, ">") == 0 ||
1823 strcmp(token, "<=") == 0 ||
1824 strcmp(token, ">=") == 0 ||
1825 strcmp(token, "==") == 0 ||
1826 strcmp(token, "!=") == 0) {
1832 /* copy the top arg to the left */
1835 arg->type = PRINT_OP;
1837 arg->op.left = left;
1838 arg->op.right = NULL;
1840 if (set_op_prio(arg) == -1) {
1841 event->flags |= EVENT_FL_FAILED;
1842 /* arg->op.op (= token) will be freed at out_free */
1847 type = read_token_item(&token);
1850 /* could just be a type pointer */
1851 if ((strcmp(arg->op.op, "*") == 0) &&
1852 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1855 if (left->type != PRINT_ATOM) {
1856 do_warning("bad pointer type");
1859 new_atom = realloc(left->atom.atom,
1860 strlen(left->atom.atom) + 3);
1864 left->atom.atom = new_atom;
1865 strcat(left->atom.atom, " *");
1873 right = alloc_arg();
1877 type = process_arg_token(event, right, tok, type);
1878 arg->op.right = right;
1880 } else if (strcmp(token, "[") == 0) {
1888 arg->type = PRINT_OP;
1890 arg->op.left = left;
1894 /* it will set arg->op.right */
1895 type = process_array(event, arg, tok);
1898 do_warning("unknown op '%s'", token);
1899 event->flags |= EVENT_FL_FAILED;
1900 /* the arg is now the left side */
1904 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
1907 /* higher prios need to be closer to the root */
1908 prio = get_op_prio(*tok);
1910 if (prio > arg->op.prio)
1911 return process_op(event, arg, tok);
1913 return process_op(event, right, tok);
1919 do_warning("%s: not enough memory!", __func__);
1926 static enum event_type
1927 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
1930 enum event_type type;
1934 if (read_expected(EVENT_OP, "->") < 0)
1937 if (read_expect_type(EVENT_ITEM, &token) < 0)
1941 arg->type = PRINT_FIELD;
1942 arg->field.name = field;
1944 if (is_flag_field) {
1945 arg->field.field = pevent_find_any_field(event, arg->field.name);
1946 arg->field.field->flags |= FIELD_IS_FLAG;
1948 } else if (is_symbolic_field) {
1949 arg->field.field = pevent_find_any_field(event, arg->field.name);
1950 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
1951 is_symbolic_field = 0;
1954 type = read_token(&token);
1966 static char *arg_eval (struct print_arg *arg);
1968 static unsigned long long
1969 eval_type_str(unsigned long long val, const char *type, int pointer)
1979 if (type[len-1] != '*') {
1980 do_warning("pointer expected with non pointer type");
1986 do_warning("%s: not enough memory!", __func__);
1989 memcpy(ref, type, len);
1991 /* chop off the " *" */
1994 val = eval_type_str(val, ref, 0);
1999 /* check if this is a pointer */
2000 if (type[len - 1] == '*')
2003 /* Try to figure out the arg size*/
2004 if (strncmp(type, "struct", 6) == 0)
2008 if (strcmp(type, "u8") == 0)
2011 if (strcmp(type, "u16") == 0)
2012 return val & 0xffff;
2014 if (strcmp(type, "u32") == 0)
2015 return val & 0xffffffff;
2017 if (strcmp(type, "u64") == 0 ||
2018 strcmp(type, "s64"))
2021 if (strcmp(type, "s8") == 0)
2022 return (unsigned long long)(char)val & 0xff;
2024 if (strcmp(type, "s16") == 0)
2025 return (unsigned long long)(short)val & 0xffff;
2027 if (strcmp(type, "s32") == 0)
2028 return (unsigned long long)(int)val & 0xffffffff;
2030 if (strncmp(type, "unsigned ", 9) == 0) {
2035 if (strcmp(type, "char") == 0) {
2037 return (unsigned long long)(char)val & 0xff;
2042 if (strcmp(type, "short") == 0) {
2044 return (unsigned long long)(short)val & 0xffff;
2046 return val & 0xffff;
2049 if (strcmp(type, "int") == 0) {
2051 return (unsigned long long)(int)val & 0xffffffff;
2053 return val & 0xffffffff;
2060 * Try to figure out the type.
2062 static unsigned long long
2063 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
2065 if (arg->type != PRINT_TYPE) {
2066 do_warning("expected type argument");
2070 return eval_type_str(val, arg->typecast.type, pointer);
2073 static int arg_num_eval(struct print_arg *arg, long long *val)
2075 long long left, right;
2078 switch (arg->type) {
2080 *val = strtoll(arg->atom.atom, NULL, 0);
2083 ret = arg_num_eval(arg->typecast.item, val);
2086 *val = eval_type(*val, arg, 0);
2089 switch (arg->op.op[0]) {
2091 ret = arg_num_eval(arg->op.left, &left);
2094 ret = arg_num_eval(arg->op.right, &right);
2098 *val = left || right;
2100 *val = left | right;
2103 ret = arg_num_eval(arg->op.left, &left);
2106 ret = arg_num_eval(arg->op.right, &right);
2110 *val = left && right;
2112 *val = left & right;
2115 ret = arg_num_eval(arg->op.left, &left);
2118 ret = arg_num_eval(arg->op.right, &right);
2121 switch (arg->op.op[1]) {
2123 *val = left < right;
2126 *val = left << right;
2129 *val = left <= right;
2132 do_warning("unknown op '%s'", arg->op.op);
2137 ret = arg_num_eval(arg->op.left, &left);
2140 ret = arg_num_eval(arg->op.right, &right);
2143 switch (arg->op.op[1]) {
2145 *val = left > right;
2148 *val = left >> right;
2151 *val = left >= right;
2154 do_warning("unknown op '%s'", arg->op.op);
2159 ret = arg_num_eval(arg->op.left, &left);
2162 ret = arg_num_eval(arg->op.right, &right);
2166 if (arg->op.op[1] != '=') {
2167 do_warning("unknown op '%s'", arg->op.op);
2170 *val = left == right;
2173 ret = arg_num_eval(arg->op.left, &left);
2176 ret = arg_num_eval(arg->op.right, &right);
2180 switch (arg->op.op[1]) {
2182 *val = left != right;
2185 do_warning("unknown op '%s'", arg->op.op);
2190 /* check for negative */
2191 if (arg->op.left->type == PRINT_NULL)
2194 ret = arg_num_eval(arg->op.left, &left);
2197 ret = arg_num_eval(arg->op.right, &right);
2200 *val = left - right;
2203 if (arg->op.left->type == PRINT_NULL)
2206 ret = arg_num_eval(arg->op.left, &left);
2209 ret = arg_num_eval(arg->op.right, &right);
2212 *val = left + right;
2215 do_warning("unknown op '%s'", arg->op.op);
2221 case PRINT_FIELD ... PRINT_SYMBOL:
2225 do_warning("invalid eval type %d", arg->type);
2232 static char *arg_eval (struct print_arg *arg)
2235 static char buf[20];
2237 switch (arg->type) {
2239 return arg->atom.atom;
2241 return arg_eval(arg->typecast.item);
2243 if (!arg_num_eval(arg, &val))
2245 sprintf(buf, "%lld", val);
2249 case PRINT_FIELD ... PRINT_SYMBOL:
2253 do_warning("invalid eval type %d", arg->type);
2260 static enum event_type
2261 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2263 enum event_type type;
2264 struct print_arg *arg = NULL;
2265 struct print_flag_sym *field;
2271 type = read_token_item(&token);
2272 if (test_type_token(type, token, EVENT_OP, "{"))
2280 type = process_arg(event, arg, &token);
2282 if (type == EVENT_OP)
2283 type = process_op(event, arg, &token);
2285 if (type == EVENT_ERROR)
2288 if (test_type_token(type, token, EVENT_DELIM, ","))
2291 field = calloc(1, sizeof(*field));
2295 value = arg_eval(arg);
2297 goto out_free_field;
2298 field->value = strdup(value);
2299 if (field->value == NULL)
2300 goto out_free_field;
2308 type = process_arg(event, arg, &token);
2309 if (test_type_token(type, token, EVENT_OP, "}"))
2310 goto out_free_field;
2312 value = arg_eval(arg);
2314 goto out_free_field;
2315 field->str = strdup(value);
2316 if (field->str == NULL)
2317 goto out_free_field;
2322 list = &field->next;
2325 type = read_token_item(&token);
2326 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2332 free_flag_sym(field);
2341 static enum event_type
2342 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2344 struct print_arg *field;
2345 enum event_type type;
2348 memset(arg, 0, sizeof(*arg));
2349 arg->type = PRINT_FLAGS;
2351 field = alloc_arg();
2353 do_warning("%s: not enough memory!", __func__);
2357 type = process_arg(event, field, &token);
2359 /* Handle operations in the first argument */
2360 while (type == EVENT_OP)
2361 type = process_op(event, field, &token);
2363 if (test_type_token(type, token, EVENT_DELIM, ","))
2364 goto out_free_field;
2367 arg->flags.field = field;
2369 type = read_token_item(&token);
2370 if (event_item_type(type)) {
2371 arg->flags.delim = token;
2372 type = read_token_item(&token);
2375 if (test_type_token(type, token, EVENT_DELIM, ","))
2378 type = process_fields(event, &arg->flags.flags, &token);
2379 if (test_type_token(type, token, EVENT_DELIM, ")"))
2383 type = read_token_item(tok);
2394 static enum event_type
2395 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2397 struct print_arg *field;
2398 enum event_type type;
2401 memset(arg, 0, sizeof(*arg));
2402 arg->type = PRINT_SYMBOL;
2404 field = alloc_arg();
2406 do_warning("%s: not enough memory!", __func__);
2410 type = process_arg(event, field, &token);
2411 if (test_type_token(type, token, EVENT_DELIM, ","))
2412 goto out_free_field;
2414 arg->symbol.field = field;
2416 type = process_fields(event, &arg->symbol.symbols, &token);
2417 if (test_type_token(type, token, EVENT_DELIM, ")"))
2421 type = read_token_item(tok);
2432 static enum event_type
2433 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2435 struct print_arg *field;
2436 enum event_type type;
2439 memset(arg, 0, sizeof(*arg));
2440 arg->type = PRINT_HEX;
2442 field = alloc_arg();
2444 do_warning("%s: not enough memory!", __func__);
2448 type = process_arg(event, field, &token);
2450 if (test_type_token(type, token, EVENT_DELIM, ","))
2453 arg->hex.field = field;
2457 field = alloc_arg();
2459 do_warning("%s: not enough memory!", __func__);
2464 type = process_arg(event, field, &token);
2466 if (test_type_token(type, token, EVENT_DELIM, ")"))
2469 arg->hex.size = field;
2472 type = read_token_item(tok);
2482 static enum event_type
2483 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2485 struct format_field *field;
2486 enum event_type type;
2489 memset(arg, 0, sizeof(*arg));
2490 arg->type = PRINT_DYNAMIC_ARRAY;
2493 * The item within the parenthesis is another field that holds
2494 * the index into where the array starts.
2496 type = read_token(&token);
2498 if (type != EVENT_ITEM)
2501 /* Find the field */
2503 field = pevent_find_field(event, token);
2507 arg->dynarray.field = field;
2508 arg->dynarray.index = 0;
2510 if (read_expected(EVENT_DELIM, ")") < 0)
2514 type = read_token_item(&token);
2516 if (type != EVENT_OP || strcmp(token, "[") != 0)
2522 do_warning("%s: not enough memory!", __func__);
2527 type = process_arg(event, arg, &token);
2528 if (type == EVENT_ERROR)
2531 if (!test_type_token(type, token, EVENT_OP, "]"))
2535 type = read_token_item(tok);
2546 static enum event_type
2547 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2549 struct print_arg *item_arg;
2550 enum event_type type;
2553 type = process_arg(event, arg, &token);
2555 if (type == EVENT_ERROR)
2558 if (type == EVENT_OP)
2559 type = process_op(event, arg, &token);
2561 if (type == EVENT_ERROR)
2564 if (test_type_token(type, token, EVENT_DELIM, ")"))
2568 type = read_token_item(&token);
2571 * If the next token is an item or another open paren, then
2572 * this was a typecast.
2574 if (event_item_type(type) ||
2575 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2577 /* make this a typecast and contine */
2579 /* prevous must be an atom */
2580 if (arg->type != PRINT_ATOM) {
2581 do_warning("previous needed to be PRINT_ATOM");
2585 item_arg = alloc_arg();
2587 do_warning("%s: not enough memory!", __func__);
2591 arg->type = PRINT_TYPE;
2592 arg->typecast.type = arg->atom.atom;
2593 arg->typecast.item = item_arg;
2594 type = process_arg_token(event, item_arg, &token, type);
2608 static enum event_type
2609 process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
2612 enum event_type type;
2615 if (read_expect_type(EVENT_ITEM, &token) < 0)
2618 arg->type = PRINT_STRING;
2619 arg->string.string = token;
2620 arg->string.offset = -1;
2622 if (read_expected(EVENT_DELIM, ")") < 0)
2625 type = read_token(&token);
2637 static struct pevent_function_handler *
2638 find_func_handler(struct pevent *pevent, char *func_name)
2640 struct pevent_function_handler *func;
2645 for (func = pevent->func_handlers; func; func = func->next) {
2646 if (strcmp(func->name, func_name) == 0)
2653 static void remove_func_handler(struct pevent *pevent, char *func_name)
2655 struct pevent_function_handler *func;
2656 struct pevent_function_handler **next;
2658 next = &pevent->func_handlers;
2659 while ((func = *next)) {
2660 if (strcmp(func->name, func_name) == 0) {
2662 free_func_handle(func);
2669 static enum event_type
2670 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2671 struct print_arg *arg, char **tok)
2673 struct print_arg **next_arg;
2674 struct print_arg *farg;
2675 enum event_type type;
2680 arg->type = PRINT_FUNC;
2681 arg->func.func = func;
2685 next_arg = &(arg->func.args);
2686 for (i = 0; i < func->nr_args; i++) {
2689 do_warning("%s: not enough memory!", __func__);
2693 type = process_arg(event, farg, &token);
2694 if (i < (func->nr_args - 1))
2699 if (test_type_token(type, token, EVENT_DELIM, test)) {
2706 next_arg = &(farg->next);
2710 type = read_token(&token);
2716 static enum event_type
2717 process_function(struct event_format *event, struct print_arg *arg,
2718 char *token, char **tok)
2720 struct pevent_function_handler *func;
2722 if (strcmp(token, "__print_flags") == 0) {
2725 return process_flags(event, arg, tok);
2727 if (strcmp(token, "__print_symbolic") == 0) {
2729 is_symbolic_field = 1;
2730 return process_symbols(event, arg, tok);
2732 if (strcmp(token, "__print_hex") == 0) {
2734 return process_hex(event, arg, tok);
2736 if (strcmp(token, "__get_str") == 0) {
2738 return process_str(event, arg, tok);
2740 if (strcmp(token, "__get_dynamic_array") == 0) {
2742 return process_dynamic_array(event, arg, tok);
2745 func = find_func_handler(event->pevent, token);
2748 return process_func_handler(event, func, arg, tok);
2751 do_warning("function %s not defined", token);
2756 static enum event_type
2757 process_arg_token(struct event_format *event, struct print_arg *arg,
2758 char **tok, enum event_type type)
2767 if (strcmp(token, "REC") == 0) {
2769 type = process_entry(event, arg, &token);
2773 /* test the next token */
2774 type = read_token_item(&token);
2777 * If the next token is a parenthesis, then this
2780 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
2783 /* this will free atom. */
2784 type = process_function(event, arg, atom, &token);
2787 /* atoms can be more than one token long */
2788 while (type == EVENT_ITEM) {
2790 new_atom = realloc(atom,
2791 strlen(atom) + strlen(token) + 2);
2800 strcat(atom, token);
2802 type = read_token_item(&token);
2805 arg->type = PRINT_ATOM;
2806 arg->atom.atom = atom;
2811 arg->type = PRINT_ATOM;
2812 arg->atom.atom = token;
2813 type = read_token_item(&token);
2816 if (strcmp(token, "(") == 0) {
2818 type = process_paren(event, arg, &token);
2822 /* handle single ops */
2823 arg->type = PRINT_OP;
2825 arg->op.left = NULL;
2826 type = process_op(event, arg, &token);
2828 /* On error, the op is freed */
2829 if (type == EVENT_ERROR)
2832 /* return error type if errored */
2835 case EVENT_ERROR ... EVENT_NEWLINE:
2837 do_warning("unexpected type %d", type);
2845 static int event_read_print_args(struct event_format *event, struct print_arg **list)
2847 enum event_type type = EVENT_ERROR;
2848 struct print_arg *arg;
2853 if (type == EVENT_NEWLINE) {
2854 type = read_token_item(&token);
2860 do_warning("%s: not enough memory!", __func__);
2864 type = process_arg(event, arg, &token);
2866 if (type == EVENT_ERROR) {
2875 if (type == EVENT_OP) {
2876 type = process_op(event, arg, &token);
2878 if (type == EVENT_ERROR) {
2887 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
2894 } while (type != EVENT_NONE);
2896 if (type != EVENT_NONE && type != EVENT_ERROR)
2902 static int event_read_print(struct event_format *event)
2904 enum event_type type;
2908 if (read_expected_item(EVENT_ITEM, "print") < 0)
2911 if (read_expected(EVENT_ITEM, "fmt") < 0)
2914 if (read_expected(EVENT_OP, ":") < 0)
2917 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
2921 event->print_fmt.format = token;
2922 event->print_fmt.args = NULL;
2924 /* ok to have no arg */
2925 type = read_token_item(&token);
2927 if (type == EVENT_NONE)
2930 /* Handle concatenation of print lines */
2931 if (type == EVENT_DQUOTE) {
2934 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
2937 free_token(event->print_fmt.format);
2938 event->print_fmt.format = NULL;
2943 if (test_type_token(type, token, EVENT_DELIM, ","))
2948 ret = event_read_print_args(event, &event->print_fmt.args);
2960 * pevent_find_common_field - return a common field by event
2961 * @event: handle for the event
2962 * @name: the name of the common field to return
2964 * Returns a common field from the event by the given @name.
2965 * This only searchs the common fields and not all field.
2967 struct format_field *
2968 pevent_find_common_field(struct event_format *event, const char *name)
2970 struct format_field *format;
2972 for (format = event->format.common_fields;
2973 format; format = format->next) {
2974 if (strcmp(format->name, name) == 0)
2982 * pevent_find_field - find a non-common field
2983 * @event: handle for the event
2984 * @name: the name of the non-common field
2986 * Returns a non-common field by the given @name.
2987 * This does not search common fields.
2989 struct format_field *
2990 pevent_find_field(struct event_format *event, const char *name)
2992 struct format_field *format;
2994 for (format = event->format.fields;
2995 format; format = format->next) {
2996 if (strcmp(format->name, name) == 0)
3004 * pevent_find_any_field - find any field by name
3005 * @event: handle for the event
3006 * @name: the name of the field
3008 * Returns a field by the given @name.
3009 * This searchs the common field names first, then
3010 * the non-common ones if a common one was not found.
3012 struct format_field *
3013 pevent_find_any_field(struct event_format *event, const char *name)
3015 struct format_field *format;
3017 format = pevent_find_common_field(event, name);
3020 return pevent_find_field(event, name);
3024 * pevent_read_number - read a number from data
3025 * @pevent: handle for the pevent
3026 * @ptr: the raw data
3027 * @size: the size of the data that holds the number
3029 * Returns the number (converted to host) from the
3032 unsigned long long pevent_read_number(struct pevent *pevent,
3033 const void *ptr, int size)
3037 return *(unsigned char *)ptr;
3039 return data2host2(pevent, ptr);
3041 return data2host4(pevent, ptr);
3043 return data2host8(pevent, ptr);
3051 * pevent_read_number_field - read a number from data
3052 * @field: a handle to the field
3053 * @data: the raw data to read
3054 * @value: the value to place the number in
3056 * Reads raw data according to a field offset and size,
3057 * and translates it into @value.
3059 * Returns 0 on success, -1 otherwise.
3061 int pevent_read_number_field(struct format_field *field, const void *data,
3062 unsigned long long *value)
3066 switch (field->size) {
3071 *value = pevent_read_number(field->event->pevent,
3072 data + field->offset, field->size);
3079 static int get_common_info(struct pevent *pevent,
3080 const char *type, int *offset, int *size)
3082 struct event_format *event;
3083 struct format_field *field;
3086 * All events should have the same common elements.
3087 * Pick any event to find where the type is;
3089 if (!pevent->events) {
3090 do_warning("no event_list!");
3094 event = pevent->events[0];
3095 field = pevent_find_common_field(event, type);
3099 *offset = field->offset;
3100 *size = field->size;
3105 static int __parse_common(struct pevent *pevent, void *data,
3106 int *size, int *offset, const char *name)
3111 ret = get_common_info(pevent, name, offset, size);
3115 return pevent_read_number(pevent, data + *offset, *size);
3118 static int trace_parse_common_type(struct pevent *pevent, void *data)
3120 return __parse_common(pevent, data,
3121 &pevent->type_size, &pevent->type_offset,
3125 static int parse_common_pid(struct pevent *pevent, void *data)
3127 return __parse_common(pevent, data,
3128 &pevent->pid_size, &pevent->pid_offset,
3132 static int parse_common_pc(struct pevent *pevent, void *data)
3134 return __parse_common(pevent, data,
3135 &pevent->pc_size, &pevent->pc_offset,
3136 "common_preempt_count");
3139 static int parse_common_flags(struct pevent *pevent, void *data)
3141 return __parse_common(pevent, data,
3142 &pevent->flags_size, &pevent->flags_offset,
3146 static int parse_common_lock_depth(struct pevent *pevent, void *data)
3148 return __parse_common(pevent, data,
3149 &pevent->ld_size, &pevent->ld_offset,
3150 "common_lock_depth");
3153 static int parse_common_migrate_disable(struct pevent *pevent, void *data)
3155 return __parse_common(pevent, data,
3156 &pevent->ld_size, &pevent->ld_offset,
3157 "common_migrate_disable");
3160 static int events_id_cmp(const void *a, const void *b);
3163 * pevent_find_event - find an event by given id
3164 * @pevent: a handle to the pevent
3165 * @id: the id of the event
3167 * Returns an event that has a given @id.
3169 struct event_format *pevent_find_event(struct pevent *pevent, int id)
3171 struct event_format **eventptr;
3172 struct event_format key;
3173 struct event_format *pkey = &key;
3175 /* Check cache first */
3176 if (pevent->last_event && pevent->last_event->id == id)
3177 return pevent->last_event;
3181 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
3182 sizeof(*pevent->events), events_id_cmp);
3185 pevent->last_event = *eventptr;
3193 * pevent_find_event_by_name - find an event by given name
3194 * @pevent: a handle to the pevent
3195 * @sys: the system name to search for
3196 * @name: the name of the event to search for
3198 * This returns an event with a given @name and under the system
3199 * @sys. If @sys is NULL the first event with @name is returned.
3201 struct event_format *
3202 pevent_find_event_by_name(struct pevent *pevent,
3203 const char *sys, const char *name)
3205 struct event_format *event;
3208 if (pevent->last_event &&
3209 strcmp(pevent->last_event->name, name) == 0 &&
3210 (!sys || strcmp(pevent->last_event->system, sys) == 0))
3211 return pevent->last_event;
3213 for (i = 0; i < pevent->nr_events; i++) {
3214 event = pevent->events[i];
3215 if (strcmp(event->name, name) == 0) {
3218 if (strcmp(event->system, sys) == 0)
3222 if (i == pevent->nr_events)
3225 pevent->last_event = event;
3229 static unsigned long long
3230 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
3232 struct pevent *pevent = event->pevent;
3233 unsigned long long val = 0;
3234 unsigned long long left, right;
3235 struct print_arg *typearg = NULL;
3236 struct print_arg *larg;
3237 unsigned long offset;
3238 unsigned int field_size;
3240 switch (arg->type) {
3245 return strtoull(arg->atom.atom, NULL, 0);
3247 if (!arg->field.field) {
3248 arg->field.field = pevent_find_any_field(event, arg->field.name);
3249 if (!arg->field.field)
3250 goto out_warning_field;
3253 /* must be a number */
3254 val = pevent_read_number(pevent, data + arg->field.field->offset,
3255 arg->field.field->size);
3262 val = eval_num_arg(data, size, event, arg->typecast.item);
3263 return eval_type(val, arg, 0);
3270 val = process_defined_func(&s, data, size, event, arg);
3271 trace_seq_destroy(&s);
3275 if (strcmp(arg->op.op, "[") == 0) {
3277 * Arrays are special, since we don't want
3278 * to read the arg as is.
3280 right = eval_num_arg(data, size, event, arg->op.right);
3282 /* handle typecasts */
3283 larg = arg->op.left;
3284 while (larg->type == PRINT_TYPE) {
3287 larg = larg->typecast.item;
3290 /* Default to long size */
3291 field_size = pevent->long_size;
3293 switch (larg->type) {
3294 case PRINT_DYNAMIC_ARRAY:
3295 offset = pevent_read_number(pevent,
3296 data + larg->dynarray.field->offset,
3297 larg->dynarray.field->size);
3298 if (larg->dynarray.field->elementsize)
3299 field_size = larg->dynarray.field->elementsize;
3301 * The actual length of the dynamic array is stored
3302 * in the top half of the field, and the offset
3303 * is in the bottom half of the 32 bit field.
3309 if (!larg->field.field) {
3311 pevent_find_any_field(event, larg->field.name);
3312 if (!larg->field.field) {
3314 goto out_warning_field;
3317 field_size = larg->field.field->elementsize;
3318 offset = larg->field.field->offset +
3319 right * larg->field.field->elementsize;
3322 goto default_op; /* oops, all bets off */
3324 val = pevent_read_number(pevent,
3325 data + offset, field_size);
3327 val = eval_type(val, typearg, 1);
3329 } else if (strcmp(arg->op.op, "?") == 0) {
3330 left = eval_num_arg(data, size, event, arg->op.left);
3331 arg = arg->op.right;
3333 val = eval_num_arg(data, size, event, arg->op.left);
3335 val = eval_num_arg(data, size, event, arg->op.right);
3339 left = eval_num_arg(data, size, event, arg->op.left);
3340 right = eval_num_arg(data, size, event, arg->op.right);
3341 switch (arg->op.op[0]) {
3343 switch (arg->op.op[1]) {
3348 val = left != right;
3351 goto out_warning_op;
3359 val = left || right;
3365 val = left && right;
3370 switch (arg->op.op[1]) {
3375 val = left << right;
3378 val = left <= right;
3381 goto out_warning_op;
3385 switch (arg->op.op[1]) {
3390 val = left >> right;
3393 val = left >= right;
3396 goto out_warning_op;
3400 if (arg->op.op[1] != '=')
3401 goto out_warning_op;
3403 val = left == right;
3418 goto out_warning_op;
3421 default: /* not sure what to do there */
3427 do_warning("%s: unknown op '%s'", __func__, arg->op.op);
3431 do_warning("%s: field %s not found", __func__, arg->field.name);
3437 unsigned long long value;
3440 static const struct flag flags[] = {
3441 { "HI_SOFTIRQ", 0 },
3442 { "TIMER_SOFTIRQ", 1 },
3443 { "NET_TX_SOFTIRQ", 2 },
3444 { "NET_RX_SOFTIRQ", 3 },
3445 { "BLOCK_SOFTIRQ", 4 },
3446 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3447 { "TASKLET_SOFTIRQ", 6 },
3448 { "SCHED_SOFTIRQ", 7 },
3449 { "HRTIMER_SOFTIRQ", 8 },
3450 { "RCU_SOFTIRQ", 9 },
3452 { "HRTIMER_NORESTART", 0 },
3453 { "HRTIMER_RESTART", 1 },
3456 static unsigned long long eval_flag(const char *flag)
3461 * Some flags in the format files do not get converted.
3462 * If the flag is not numeric, see if it is something that
3463 * we already know about.
3465 if (isdigit(flag[0]))
3466 return strtoull(flag, NULL, 0);
3468 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3469 if (strcmp(flags[i].name, flag) == 0)
3470 return flags[i].value;
3475 static void print_str_to_seq(struct trace_seq *s, const char *format,
3476 int len_arg, const char *str)
3479 trace_seq_printf(s, format, len_arg, str);
3481 trace_seq_printf(s, format, str);
3484 static void print_str_arg(struct trace_seq *s, void *data, int size,
3485 struct event_format *event, const char *format,
3486 int len_arg, struct print_arg *arg)
3488 struct pevent *pevent = event->pevent;
3489 struct print_flag_sym *flag;
3490 struct format_field *field;
3491 unsigned long long val, fval;
3498 switch (arg->type) {
3503 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3506 field = arg->field.field;
3508 field = pevent_find_any_field(event, arg->field.name);
3510 str = arg->field.name;
3511 goto out_warning_field;
3513 arg->field.field = field;
3515 /* Zero sized fields, mean the rest of the data */
3516 len = field->size ? : size - field->offset;
3519 * Some events pass in pointers. If this is not an array
3520 * and the size is the same as long_size, assume that it
3523 if (!(field->flags & FIELD_IS_ARRAY) &&
3524 field->size == pevent->long_size) {
3525 addr = *(unsigned long *)(data + field->offset);
3526 trace_seq_printf(s, "%lx", addr);
3529 str = malloc(len + 1);
3531 do_warning("%s: not enough memory!", __func__);
3534 memcpy(str, data + field->offset, len);
3536 print_str_to_seq(s, format, len_arg, str);
3540 val = eval_num_arg(data, size, event, arg->flags.field);
3542 for (flag = arg->flags.flags; flag; flag = flag->next) {
3543 fval = eval_flag(flag->value);
3544 if (!val && !fval) {
3545 print_str_to_seq(s, format, len_arg, flag->str);
3548 if (fval && (val & fval) == fval) {
3549 if (print && arg->flags.delim)
3550 trace_seq_puts(s, arg->flags.delim);
3551 print_str_to_seq(s, format, len_arg, flag->str);
3558 val = eval_num_arg(data, size, event, arg->symbol.field);
3559 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3560 fval = eval_flag(flag->value);
3562 print_str_to_seq(s, format, len_arg, flag->str);
3568 field = arg->hex.field->field.field;
3570 str = arg->hex.field->field.name;
3571 field = pevent_find_any_field(event, str);
3573 goto out_warning_field;
3574 arg->hex.field->field.field = field;
3576 hex = data + field->offset;
3577 len = eval_num_arg(data, size, event, arg->hex.size);
3578 for (i = 0; i < len; i++) {
3580 trace_seq_putc(s, ' ');
3581 trace_seq_printf(s, "%02x", hex[i]);
3587 case PRINT_STRING: {
3590 if (arg->string.offset == -1) {
3591 struct format_field *f;
3593 f = pevent_find_any_field(event, arg->string.string);
3594 arg->string.offset = f->offset;
3596 str_offset = data2host4(pevent, data + arg->string.offset);
3597 str_offset &= 0xffff;
3598 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
3602 print_str_to_seq(s, format, len_arg, arg->string.string);
3606 * The only op for string should be ? :
3608 if (arg->op.op[0] != '?')
3610 val = eval_num_arg(data, size, event, arg->op.left);
3612 print_str_arg(s, data, size, event,
3613 format, len_arg, arg->op.right->op.left);
3615 print_str_arg(s, data, size, event,
3616 format, len_arg, arg->op.right->op.right);
3619 process_defined_func(s, data, size, event, arg);
3629 do_warning("%s: field %s not found", __func__, arg->field.name);
3632 static unsigned long long
3633 process_defined_func(struct trace_seq *s, void *data, int size,
3634 struct event_format *event, struct print_arg *arg)
3636 struct pevent_function_handler *func_handle = arg->func.func;
3637 struct pevent_func_params *param;
3638 unsigned long long *args;
3639 unsigned long long ret;
3640 struct print_arg *farg;
3641 struct trace_seq str;
3643 struct save_str *next;
3645 } *strings = NULL, *string;
3648 if (!func_handle->nr_args) {
3649 ret = (*func_handle->func)(s, NULL);
3653 farg = arg->func.args;
3654 param = func_handle->params;
3657 args = malloc(sizeof(*args) * func_handle->nr_args);
3661 for (i = 0; i < func_handle->nr_args; i++) {
3662 switch (param->type) {
3663 case PEVENT_FUNC_ARG_INT:
3664 case PEVENT_FUNC_ARG_LONG:
3665 case PEVENT_FUNC_ARG_PTR:
3666 args[i] = eval_num_arg(data, size, event, farg);
3668 case PEVENT_FUNC_ARG_STRING:
3669 trace_seq_init(&str);
3670 print_str_arg(&str, data, size, event, "%s", -1, farg);
3671 trace_seq_terminate(&str);
3672 string = malloc(sizeof(*string));
3674 do_warning("%s(%d): malloc str", __func__, __LINE__);
3677 string->next = strings;
3678 string->str = strdup(str.buffer);
3681 do_warning("%s(%d): malloc str", __func__, __LINE__);
3684 args[i] = (uintptr_t)string->str;
3686 trace_seq_destroy(&str);
3690 * Something went totally wrong, this is not
3691 * an input error, something in this code broke.
3693 do_warning("Unexpected end of arguments\n");
3697 param = param->next;
3700 ret = (*func_handle->func)(s, args);
3705 strings = string->next;
3711 /* TBD : handle return type here */
3715 static void free_args(struct print_arg *args)
3717 struct print_arg *next;
3727 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
3729 struct pevent *pevent = event->pevent;
3730 struct format_field *field, *ip_field;
3731 struct print_arg *args, *arg, **next;
3732 unsigned long long ip, val;
3737 field = pevent->bprint_buf_field;
3738 ip_field = pevent->bprint_ip_field;
3741 field = pevent_find_field(event, "buf");
3743 do_warning("can't find buffer field for binary printk");
3746 ip_field = pevent_find_field(event, "ip");
3748 do_warning("can't find ip field for binary printk");
3751 pevent->bprint_buf_field = field;
3752 pevent->bprint_ip_field = ip_field;
3755 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
3758 * The first arg is the IP pointer.
3762 do_warning("%s(%d): not enough memory!", __func__, __LINE__);
3769 arg->type = PRINT_ATOM;
3771 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
3774 /* skip the first "%pf : " */
3775 for (ptr = fmt + 6, bptr = data + field->offset;
3776 bptr < data + size && *ptr; ptr++) {
3807 vsize = pevent->long_size;
3821 /* the pointers are always 4 bytes aligned */
3822 bptr = (void *)(((unsigned long)bptr + 3) &
3824 val = pevent_read_number(pevent, bptr, vsize);
3828 do_warning("%s(%d): not enough memory!",
3829 __func__, __LINE__);
3833 arg->type = PRINT_ATOM;
3834 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
3841 * The '*' case means that an arg is used as the length.
3842 * We need to continue to figure out for what.
3851 do_warning("%s(%d): not enough memory!",
3852 __func__, __LINE__);
3856 arg->type = PRINT_BSTRING;
3857 arg->string.string = strdup(bptr);
3858 if (!arg->string.string)
3860 bptr += strlen(bptr) + 1;
3877 get_bprint_format(void *data, int size __maybe_unused,
3878 struct event_format *event)
3880 struct pevent *pevent = event->pevent;
3881 unsigned long long addr;
3882 struct format_field *field;
3883 struct printk_map *printk;
3887 field = pevent->bprint_fmt_field;
3890 field = pevent_find_field(event, "fmt");
3892 do_warning("can't find format field for binary printk");
3895 pevent->bprint_fmt_field = field;
3898 addr = pevent_read_number(pevent, data + field->offset, field->size);
3900 printk = find_printk(pevent, addr);
3902 if (asprintf(&format, "%%pf : (NO FORMAT FOUND at %llx)\n", addr) < 0)
3908 /* Remove any quotes. */
3911 if (asprintf(&format, "%s : %s", "%pf", p) < 0)
3913 /* remove ending quotes and new line since we will add one too */
3914 p = format + strlen(format) - 1;
3919 if (strcmp(p, "\\n") == 0)
3925 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
3926 struct event_format *event, struct print_arg *arg)
3929 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3931 if (arg->type == PRINT_FUNC) {
3932 process_defined_func(s, data, size, event, arg);
3936 if (arg->type != PRINT_FIELD) {
3937 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
3943 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
3944 if (!arg->field.field) {
3946 pevent_find_any_field(event, arg->field.name);
3947 if (!arg->field.field) {
3948 do_warning("%s: field %s not found",
3949 __func__, arg->field.name);
3953 if (arg->field.field->size != 6) {
3954 trace_seq_printf(s, "INVALIDMAC");
3957 buf = data + arg->field.field->offset;
3958 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
3961 static int is_printable_array(char *p, unsigned int len)
3965 for (i = 0; i < len && p[i]; i++)
3971 static void print_event_fields(struct trace_seq *s, void *data,
3972 int size __maybe_unused,
3973 struct event_format *event)
3975 struct format_field *field;
3976 unsigned long long val;
3977 unsigned int offset, len, i;
3979 field = event->format.fields;
3981 trace_seq_printf(s, " %s=", field->name);
3982 if (field->flags & FIELD_IS_ARRAY) {
3983 offset = field->offset;
3985 if (field->flags & FIELD_IS_DYNAMIC) {
3986 val = pevent_read_number(event->pevent, data + offset, len);
3991 if (field->flags & FIELD_IS_STRING &&
3992 is_printable_array(data + offset, len)) {
3993 trace_seq_printf(s, "%s", (char *)data + offset);
3995 trace_seq_puts(s, "ARRAY[");
3996 for (i = 0; i < len; i++) {
3998 trace_seq_puts(s, ", ");
3999 trace_seq_printf(s, "%02x",
4000 *((unsigned char *)data + offset + i));
4002 trace_seq_putc(s, ']');
4003 field->flags &= ~FIELD_IS_STRING;
4006 val = pevent_read_number(event->pevent, data + field->offset,
4008 if (field->flags & FIELD_IS_POINTER) {
4009 trace_seq_printf(s, "0x%llx", val);
4010 } else if (field->flags & FIELD_IS_SIGNED) {
4011 switch (field->size) {
4014 * If field is long then print it in hex.
4015 * A long usually stores pointers.
4017 if (field->flags & FIELD_IS_LONG)
4018 trace_seq_printf(s, "0x%x", (int)val);
4020 trace_seq_printf(s, "%d", (int)val);
4023 trace_seq_printf(s, "%2d", (short)val);
4026 trace_seq_printf(s, "%1d", (char)val);
4029 trace_seq_printf(s, "%lld", val);
4032 if (field->flags & FIELD_IS_LONG)
4033 trace_seq_printf(s, "0x%llx", val);
4035 trace_seq_printf(s, "%llu", val);
4038 field = field->next;
4042 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
4044 struct pevent *pevent = event->pevent;
4045 struct print_fmt *print_fmt = &event->print_fmt;
4046 struct print_arg *arg = print_fmt->args;
4047 struct print_arg *args = NULL;
4048 const char *ptr = print_fmt->format;
4049 unsigned long long val;
4050 struct func_map *func;
4051 const char *saveptr;
4052 char *bprint_fmt = NULL;
4060 if (event->flags & EVENT_FL_FAILED) {
4061 trace_seq_printf(s, "[FAILED TO PARSE]");
4062 print_event_fields(s, data, size, event);
4066 if (event->flags & EVENT_FL_ISBPRINT) {
4067 bprint_fmt = get_bprint_format(data, size, event);
4068 args = make_bprint_args(bprint_fmt, data, size, event);
4073 for (; *ptr; ptr++) {
4079 trace_seq_putc(s, '\n');
4082 trace_seq_putc(s, '\t');
4085 trace_seq_putc(s, '\r');
4088 trace_seq_putc(s, '\\');
4091 trace_seq_putc(s, *ptr);
4095 } else if (*ptr == '%') {
4103 trace_seq_putc(s, '%');
4106 /* FIXME: need to handle properly */
4118 /* The argument is the length. */
4120 do_warning("no argument match");
4121 event->flags |= EVENT_FL_FAILED;
4124 len_arg = eval_num_arg(data, size, event, arg);
4134 if (pevent->long_size == 4)
4139 if (*(ptr+1) == 'F' ||
4143 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
4144 print_mac_arg(s, *(ptr+1), data, size, event, arg);
4157 do_warning("no argument match");
4158 event->flags |= EVENT_FL_FAILED;
4162 len = ((unsigned long)ptr + 1) -
4163 (unsigned long)saveptr;
4165 /* should never happen */
4167 do_warning("bad format!");
4168 event->flags |= EVENT_FL_FAILED;
4172 memcpy(format, saveptr, len);
4175 val = eval_num_arg(data, size, event, arg);
4179 func = find_func(pevent, val);
4181 trace_seq_puts(s, func->func);
4182 if (show_func == 'F')
4189 if (pevent->long_size == 8 && ls &&
4190 sizeof(long) != 8) {
4194 /* make %l into %ll */
4195 p = strchr(format, 'l');
4197 memmove(p+1, p, strlen(p)+1);
4198 else if (strcmp(format, "%p") == 0)
4199 strcpy(format, "0x%llx");
4204 trace_seq_printf(s, format, len_arg, (char)val);
4206 trace_seq_printf(s, format, (char)val);
4210 trace_seq_printf(s, format, len_arg, (short)val);
4212 trace_seq_printf(s, format, (short)val);
4216 trace_seq_printf(s, format, len_arg, (int)val);
4218 trace_seq_printf(s, format, (int)val);
4222 trace_seq_printf(s, format, len_arg, (long)val);
4224 trace_seq_printf(s, format, (long)val);
4228 trace_seq_printf(s, format, len_arg,
4231 trace_seq_printf(s, format, (long long)val);
4234 do_warning("bad count (%d)", ls);
4235 event->flags |= EVENT_FL_FAILED;
4240 do_warning("no matching argument");
4241 event->flags |= EVENT_FL_FAILED;
4245 len = ((unsigned long)ptr + 1) -
4246 (unsigned long)saveptr;
4248 /* should never happen */
4250 do_warning("bad format!");
4251 event->flags |= EVENT_FL_FAILED;
4255 memcpy(format, saveptr, len);
4259 print_str_arg(s, data, size, event,
4260 format, len_arg, arg);
4264 trace_seq_printf(s, ">%c<", *ptr);
4268 trace_seq_putc(s, *ptr);
4271 if (event->flags & EVENT_FL_FAILED) {
4273 trace_seq_printf(s, "[FAILED TO PARSE]");
4283 * pevent_data_lat_fmt - parse the data for the latency format
4284 * @pevent: a handle to the pevent
4285 * @s: the trace_seq to write to
4286 * @record: the record to read from
4288 * This parses out the Latency format (interrupts disabled,
4289 * need rescheduling, in hard/soft interrupt, preempt count
4290 * and lock depth) and places it into the trace_seq.
4292 void pevent_data_lat_fmt(struct pevent *pevent,
4293 struct trace_seq *s, struct pevent_record *record)
4295 static int check_lock_depth = 1;
4296 static int check_migrate_disable = 1;
4297 static int lock_depth_exists;
4298 static int migrate_disable_exists;
4299 unsigned int lat_flags;
4302 int migrate_disable;
4305 void *data = record->data;
4307 lat_flags = parse_common_flags(pevent, data);
4308 pc = parse_common_pc(pevent, data);
4309 /* lock_depth may not always exist */
4310 if (lock_depth_exists)
4311 lock_depth = parse_common_lock_depth(pevent, data);
4312 else if (check_lock_depth) {
4313 lock_depth = parse_common_lock_depth(pevent, data);
4315 check_lock_depth = 0;
4317 lock_depth_exists = 1;
4320 /* migrate_disable may not always exist */
4321 if (migrate_disable_exists)
4322 migrate_disable = parse_common_migrate_disable(pevent, data);
4323 else if (check_migrate_disable) {
4324 migrate_disable = parse_common_migrate_disable(pevent, data);
4325 if (migrate_disable < 0)
4326 check_migrate_disable = 0;
4328 migrate_disable_exists = 1;
4331 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
4332 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
4334 trace_seq_printf(s, "%c%c%c",
4335 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
4336 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
4338 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
4340 (hardirq && softirq) ? 'H' :
4341 hardirq ? 'h' : softirq ? 's' : '.');
4344 trace_seq_printf(s, "%x", pc);
4346 trace_seq_putc(s, '.');
4348 if (migrate_disable_exists) {
4349 if (migrate_disable < 0)
4350 trace_seq_putc(s, '.');
4352 trace_seq_printf(s, "%d", migrate_disable);
4355 if (lock_depth_exists) {
4357 trace_seq_putc(s, '.');
4359 trace_seq_printf(s, "%d", lock_depth);
4362 trace_seq_terminate(s);
4366 * pevent_data_type - parse out the given event type
4367 * @pevent: a handle to the pevent
4368 * @rec: the record to read from
4370 * This returns the event id from the @rec.
4372 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
4374 return trace_parse_common_type(pevent, rec->data);
4378 * pevent_data_event_from_type - find the event by a given type
4379 * @pevent: a handle to the pevent
4380 * @type: the type of the event.
4382 * This returns the event form a given @type;
4384 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
4386 return pevent_find_event(pevent, type);
4390 * pevent_data_pid - parse the PID from raw data
4391 * @pevent: a handle to the pevent
4392 * @rec: the record to parse
4394 * This returns the PID from a raw data.
4396 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
4398 return parse_common_pid(pevent, rec->data);
4402 * pevent_data_comm_from_pid - return the command line from PID
4403 * @pevent: a handle to the pevent
4404 * @pid: the PID of the task to search for
4406 * This returns a pointer to the command line that has the given
4409 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
4413 comm = find_cmdline(pevent, pid);
4418 * pevent_data_comm_from_pid - parse the data into the print format
4419 * @s: the trace_seq to write to
4420 * @event: the handle to the event
4421 * @record: the record to read from
4423 * This parses the raw @data using the given @event information and
4424 * writes the print format into the trace_seq.
4426 void pevent_event_info(struct trace_seq *s, struct event_format *event,
4427 struct pevent_record *record)
4429 int print_pretty = 1;
4431 if (event->pevent->print_raw)
4432 print_event_fields(s, record->data, record->size, event);
4436 print_pretty = event->handler(s, record, event,
4440 pretty_print(s, record->data, record->size, event);
4443 trace_seq_terminate(s);
4446 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
4447 struct pevent_record *record)
4449 static const char *spaces = " "; /* 20 spaces */
4450 struct event_format *event;
4452 unsigned long usecs;
4453 unsigned long nsecs;
4455 void *data = record->data;
4461 secs = record->ts / NSECS_PER_SEC;
4462 nsecs = record->ts - secs * NSECS_PER_SEC;
4464 if (record->size < 0) {
4465 do_warning("ug! negative record size %d", record->size);
4469 type = trace_parse_common_type(pevent, data);
4471 event = pevent_find_event(pevent, type);
4473 do_warning("ug! no event found for type %d", type);
4477 pid = parse_common_pid(pevent, data);
4478 comm = find_cmdline(pevent, pid);
4480 if (pevent->latency_format) {
4481 trace_seq_printf(s, "%8.8s-%-5d %3d",
4482 comm, pid, record->cpu);
4483 pevent_data_lat_fmt(pevent, s, record);
4485 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
4487 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
4491 usecs = (nsecs + 500) / NSECS_PER_USEC;
4495 trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
4497 /* Space out the event names evenly. */
4498 len = strlen(event->name);
4500 trace_seq_printf(s, "%.*s", 20 - len, spaces);
4502 pevent_event_info(s, event, record);
4505 static int events_id_cmp(const void *a, const void *b)
4507 struct event_format * const * ea = a;
4508 struct event_format * const * eb = b;
4510 if ((*ea)->id < (*eb)->id)
4513 if ((*ea)->id > (*eb)->id)
4519 static int events_name_cmp(const void *a, const void *b)
4521 struct event_format * const * ea = a;
4522 struct event_format * const * eb = b;
4525 res = strcmp((*ea)->name, (*eb)->name);
4529 res = strcmp((*ea)->system, (*eb)->system);
4533 return events_id_cmp(a, b);
4536 static int events_system_cmp(const void *a, const void *b)
4538 struct event_format * const * ea = a;
4539 struct event_format * const * eb = b;
4542 res = strcmp((*ea)->system, (*eb)->system);
4546 res = strcmp((*ea)->name, (*eb)->name);
4550 return events_id_cmp(a, b);
4553 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
4555 struct event_format **events;
4556 int (*sort)(const void *a, const void *b);
4558 events = pevent->sort_events;
4560 if (events && pevent->last_type == sort_type)
4564 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
4568 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
4569 events[pevent->nr_events] = NULL;
4571 pevent->sort_events = events;
4573 /* the internal events are sorted by id */
4574 if (sort_type == EVENT_SORT_ID) {
4575 pevent->last_type = sort_type;
4580 switch (sort_type) {
4582 sort = events_id_cmp;
4584 case EVENT_SORT_NAME:
4585 sort = events_name_cmp;
4587 case EVENT_SORT_SYSTEM:
4588 sort = events_system_cmp;
4594 qsort(events, pevent->nr_events, sizeof(*events), sort);
4595 pevent->last_type = sort_type;
4600 static struct format_field **
4601 get_event_fields(const char *type, const char *name,
4602 int count, struct format_field *list)
4604 struct format_field **fields;
4605 struct format_field *field;
4608 fields = malloc(sizeof(*fields) * (count + 1));
4612 for (field = list; field; field = field->next) {
4613 fields[i++] = field;
4614 if (i == count + 1) {
4615 do_warning("event %s has more %s fields than specified",
4623 do_warning("event %s has less %s fields than specified",
4632 * pevent_event_common_fields - return a list of common fields for an event
4633 * @event: the event to return the common fields of.
4635 * Returns an allocated array of fields. The last item in the array is NULL.
4636 * The array must be freed with free().
4638 struct format_field **pevent_event_common_fields(struct event_format *event)
4640 return get_event_fields("common", event->name,
4641 event->format.nr_common,
4642 event->format.common_fields);
4646 * pevent_event_fields - return a list of event specific fields for an event
4647 * @event: the event to return the fields of.
4649 * Returns an allocated array of fields. The last item in the array is NULL.
4650 * The array must be freed with free().
4652 struct format_field **pevent_event_fields(struct event_format *event)
4654 return get_event_fields("event", event->name,
4655 event->format.nr_fields,
4656 event->format.fields);
4659 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
4661 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
4663 trace_seq_puts(s, ", ");
4664 print_fields(s, field->next);
4669 static void print_args(struct print_arg *args)
4671 int print_paren = 1;
4674 switch (args->type) {
4679 printf("%s", args->atom.atom);
4682 printf("REC->%s", args->field.name);
4685 printf("__print_flags(");
4686 print_args(args->flags.field);
4687 printf(", %s, ", args->flags.delim);
4689 print_fields(&s, args->flags.flags);
4690 trace_seq_do_printf(&s);
4691 trace_seq_destroy(&s);
4695 printf("__print_symbolic(");
4696 print_args(args->symbol.field);
4699 print_fields(&s, args->symbol.symbols);
4700 trace_seq_do_printf(&s);
4701 trace_seq_destroy(&s);
4705 printf("__print_hex(");
4706 print_args(args->hex.field);
4708 print_args(args->hex.size);
4713 printf("__get_str(%s)", args->string.string);
4716 printf("(%s)", args->typecast.type);
4717 print_args(args->typecast.item);
4720 if (strcmp(args->op.op, ":") == 0)
4724 print_args(args->op.left);
4725 printf(" %s ", args->op.op);
4726 print_args(args->op.right);
4731 /* we should warn... */
4736 print_args(args->next);
4740 static void parse_header_field(const char *field,
4741 int *offset, int *size, int mandatory)
4743 unsigned long long save_input_buf_ptr;
4744 unsigned long long save_input_buf_siz;
4748 save_input_buf_ptr = input_buf_ptr;
4749 save_input_buf_siz = input_buf_siz;
4751 if (read_expected(EVENT_ITEM, "field") < 0)
4753 if (read_expected(EVENT_OP, ":") < 0)
4757 if (read_expect_type(EVENT_ITEM, &token) < 0)
4762 * If this is not a mandatory field, then test it first.
4765 if (read_expected(EVENT_ITEM, field) < 0)
4768 if (read_expect_type(EVENT_ITEM, &token) < 0)
4770 if (strcmp(token, field) != 0)
4775 if (read_expected(EVENT_OP, ";") < 0)
4777 if (read_expected(EVENT_ITEM, "offset") < 0)
4779 if (read_expected(EVENT_OP, ":") < 0)
4781 if (read_expect_type(EVENT_ITEM, &token) < 0)
4783 *offset = atoi(token);
4785 if (read_expected(EVENT_OP, ";") < 0)
4787 if (read_expected(EVENT_ITEM, "size") < 0)
4789 if (read_expected(EVENT_OP, ":") < 0)
4791 if (read_expect_type(EVENT_ITEM, &token) < 0)
4793 *size = atoi(token);
4795 if (read_expected(EVENT_OP, ";") < 0)
4797 type = read_token(&token);
4798 if (type != EVENT_NEWLINE) {
4799 /* newer versions of the kernel have a "signed" type */
4800 if (type != EVENT_ITEM)
4803 if (strcmp(token, "signed") != 0)
4808 if (read_expected(EVENT_OP, ":") < 0)
4811 if (read_expect_type(EVENT_ITEM, &token))
4815 if (read_expected(EVENT_OP, ";") < 0)
4818 if (read_expect_type(EVENT_NEWLINE, &token))
4826 input_buf_ptr = save_input_buf_ptr;
4827 input_buf_siz = save_input_buf_siz;
4834 * pevent_parse_header_page - parse the data stored in the header page
4835 * @pevent: the handle to the pevent
4836 * @buf: the buffer storing the header page format string
4837 * @size: the size of @buf
4838 * @long_size: the long size to use if there is no header
4840 * This parses the header page format for information on the
4841 * ring buffer used. The @buf should be copied from
4843 * /sys/kernel/debug/tracing/events/header_page
4845 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
4852 * Old kernels did not have header page info.
4853 * Sorry but we just use what we find here in user space.
4855 pevent->header_page_ts_size = sizeof(long long);
4856 pevent->header_page_size_size = long_size;
4857 pevent->header_page_data_offset = sizeof(long long) + long_size;
4858 pevent->old_format = 1;
4861 init_input_buf(buf, size);
4863 parse_header_field("timestamp", &pevent->header_page_ts_offset,
4864 &pevent->header_page_ts_size, 1);
4865 parse_header_field("commit", &pevent->header_page_size_offset,
4866 &pevent->header_page_size_size, 1);
4867 parse_header_field("overwrite", &pevent->header_page_overwrite,
4869 parse_header_field("data", &pevent->header_page_data_offset,
4870 &pevent->header_page_data_size, 1);
4875 static int event_matches(struct event_format *event,
4876 int id, const char *sys_name,
4877 const char *event_name)
4879 if (id >= 0 && id != event->id)
4882 if (event_name && (strcmp(event_name, event->name) != 0))
4885 if (sys_name && (strcmp(sys_name, event->system) != 0))
4891 static void free_handler(struct event_handler *handle)
4893 free((void *)handle->sys_name);
4894 free((void *)handle->event_name);
4898 static int find_event_handle(struct pevent *pevent, struct event_format *event)
4900 struct event_handler *handle, **next;
4902 for (next = &pevent->handlers; *next;
4903 next = &(*next)->next) {
4905 if (event_matches(event, handle->id,
4907 handle->event_name))
4914 pr_stat("overriding event (%d) %s:%s with new print handler",
4915 event->id, event->system, event->name);
4917 event->handler = handle->func;
4918 event->context = handle->context;
4920 *next = handle->next;
4921 free_handler(handle);
4927 * __pevent_parse_format - parse the event format
4928 * @buf: the buffer storing the event format string
4929 * @size: the size of @buf
4930 * @sys: the system the event belongs to
4932 * This parses the event format and creates an event structure
4933 * to quickly parse raw data for a given event.
4935 * These files currently come from:
4937 * /sys/kernel/debug/tracing/events/.../.../format
4939 enum pevent_errno __pevent_parse_format(struct event_format **eventp,
4940 struct pevent *pevent, const char *buf,
4941 unsigned long size, const char *sys)
4943 struct event_format *event;
4946 init_input_buf(buf, size);
4948 *eventp = event = alloc_event();
4950 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
4952 event->name = event_read_name();
4955 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
4956 goto event_alloc_failed;
4959 if (strcmp(sys, "ftrace") == 0) {
4960 event->flags |= EVENT_FL_ISFTRACE;
4962 if (strcmp(event->name, "bprint") == 0)
4963 event->flags |= EVENT_FL_ISBPRINT;
4966 event->id = event_read_id();
4967 if (event->id < 0) {
4968 ret = PEVENT_ERRNO__READ_ID_FAILED;
4970 * This isn't an allocation error actually.
4971 * But as the ID is critical, just bail out.
4973 goto event_alloc_failed;
4976 event->system = strdup(sys);
4977 if (!event->system) {
4978 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
4979 goto event_alloc_failed;
4982 /* Add pevent to event so that it can be referenced */
4983 event->pevent = pevent;
4985 ret = event_read_format(event);
4987 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
4988 goto event_parse_failed;
4992 * If the event has an override, don't print warnings if the event
4993 * print format fails to parse.
4995 if (pevent && find_event_handle(pevent, event))
4998 ret = event_read_print(event);
5002 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
5003 goto event_parse_failed;
5006 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
5007 struct format_field *field;
5008 struct print_arg *arg, **list;
5010 /* old ftrace had no args */
5011 list = &event->print_fmt.args;
5012 for (field = event->format.fields; field; field = field->next) {
5015 event->flags |= EVENT_FL_FAILED;
5016 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
5018 arg->type = PRINT_FIELD;
5019 arg->field.name = strdup(field->name);
5020 if (!arg->field.name) {
5021 event->flags |= EVENT_FL_FAILED;
5023 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
5025 arg->field.field = field;
5035 event->flags |= EVENT_FL_FAILED;
5039 free(event->system);
5047 * pevent_parse_format - parse the event format
5048 * @buf: the buffer storing the event format string
5049 * @size: the size of @buf
5050 * @sys: the system the event belongs to
5052 * This parses the event format and creates an event structure
5053 * to quickly parse raw data for a given event.
5055 * These files currently come from:
5057 * /sys/kernel/debug/tracing/events/.../.../format
5059 enum pevent_errno pevent_parse_format(struct event_format **eventp, const char *buf,
5060 unsigned long size, const char *sys)
5062 return __pevent_parse_format(eventp, NULL, buf, size, sys);
5066 * pevent_parse_event - parse the event format
5067 * @pevent: the handle to the pevent
5068 * @buf: the buffer storing the event format string
5069 * @size: the size of @buf
5070 * @sys: the system the event belongs to
5072 * This parses the event format and creates an event structure
5073 * to quickly parse raw data for a given event.
5075 * These files currently come from:
5077 * /sys/kernel/debug/tracing/events/.../.../format
5079 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
5080 unsigned long size, const char *sys)
5082 struct event_format *event = NULL;
5083 int ret = __pevent_parse_format(&event, pevent, buf, size, sys);
5088 if (add_event(pevent, event)) {
5089 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5090 goto event_add_failed;
5093 #define PRINT_ARGS 0
5094 if (PRINT_ARGS && event->print_fmt.args)
5095 print_args(event->print_fmt.args);
5100 pevent_free_format(event);
5105 #define _PE(code, str) str
5106 static const char * const pevent_error_str[] = {
5111 int pevent_strerror(struct pevent *pevent __maybe_unused,
5112 enum pevent_errno errnum, char *buf, size_t buflen)
5118 msg = strerror_r(errnum, buf, buflen);
5120 size_t len = strlen(msg);
5121 memcpy(buf, msg, min(buflen - 1, len));
5122 *(buf + min(buflen - 1, len)) = '\0';
5127 if (errnum <= __PEVENT_ERRNO__START ||
5128 errnum >= __PEVENT_ERRNO__END)
5131 idx = errnum - __PEVENT_ERRNO__START - 1;
5132 msg = pevent_error_str[idx];
5135 case PEVENT_ERRNO__MEM_ALLOC_FAILED:
5136 case PEVENT_ERRNO__PARSE_EVENT_FAILED:
5137 case PEVENT_ERRNO__READ_ID_FAILED:
5138 case PEVENT_ERRNO__READ_FORMAT_FAILED:
5139 case PEVENT_ERRNO__READ_PRINT_FAILED:
5140 case PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED:
5141 case PEVENT_ERRNO__INVALID_ARG_TYPE:
5142 snprintf(buf, buflen, "%s", msg);
5146 /* cannot reach here */
5153 int get_field_val(struct trace_seq *s, struct format_field *field,
5154 const char *name, struct pevent_record *record,
5155 unsigned long long *val, int err)
5159 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
5163 if (pevent_read_number_field(field, record->data, val)) {
5165 trace_seq_printf(s, " %s=INVALID", name);
5173 * pevent_get_field_raw - return the raw pointer into the data field
5174 * @s: The seq to print to on error
5175 * @event: the event that the field is for
5176 * @name: The name of the field
5177 * @record: The record with the field name.
5178 * @len: place to store the field length.
5179 * @err: print default error if failed.
5181 * Returns a pointer into record->data of the field and places
5182 * the length of the field in @len.
5184 * On failure, it returns NULL.
5186 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
5187 const char *name, struct pevent_record *record,
5190 struct format_field *field;
5191 void *data = record->data;
5198 field = pevent_find_field(event, name);
5202 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
5206 /* Allow @len to be NULL */
5210 offset = field->offset;
5211 if (field->flags & FIELD_IS_DYNAMIC) {
5212 offset = pevent_read_number(event->pevent,
5213 data + offset, field->size);
5214 *len = offset >> 16;
5219 return data + offset;
5223 * pevent_get_field_val - find a field and return its value
5224 * @s: The seq to print to on error
5225 * @event: the event that the field is for
5226 * @name: The name of the field
5227 * @record: The record with the field name.
5228 * @val: place to store the value of the field.
5229 * @err: print default error if failed.
5231 * Returns 0 on success -1 on field not found.
5233 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
5234 const char *name, struct pevent_record *record,
5235 unsigned long long *val, int err)
5237 struct format_field *field;
5242 field = pevent_find_field(event, name);
5244 return get_field_val(s, field, name, record, val, err);
5248 * pevent_get_common_field_val - find a common field and return its value
5249 * @s: The seq to print to on error
5250 * @event: the event that the field is for
5251 * @name: The name of the field
5252 * @record: The record with the field name.
5253 * @val: place to store the value of the field.
5254 * @err: print default error if failed.
5256 * Returns 0 on success -1 on field not found.
5258 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
5259 const char *name, struct pevent_record *record,
5260 unsigned long long *val, int err)
5262 struct format_field *field;
5267 field = pevent_find_common_field(event, name);
5269 return get_field_val(s, field, name, record, val, err);
5273 * pevent_get_any_field_val - find a any field and return its value
5274 * @s: The seq to print to on error
5275 * @event: the event that the field is for
5276 * @name: The name of the field
5277 * @record: The record with the field name.
5278 * @val: place to store the value of the field.
5279 * @err: print default error if failed.
5281 * Returns 0 on success -1 on field not found.
5283 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
5284 const char *name, struct pevent_record *record,
5285 unsigned long long *val, int err)
5287 struct format_field *field;
5292 field = pevent_find_any_field(event, name);
5294 return get_field_val(s, field, name, record, val, err);
5298 * pevent_print_num_field - print a field and a format
5299 * @s: The seq to print to
5300 * @fmt: The printf format to print the field with.
5301 * @event: the event that the field is for
5302 * @name: The name of the field
5303 * @record: The record with the field name.
5304 * @err: print default error if failed.
5306 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
5308 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
5309 struct event_format *event, const char *name,
5310 struct pevent_record *record, int err)
5312 struct format_field *field = pevent_find_field(event, name);
5313 unsigned long long val;
5318 if (pevent_read_number_field(field, record->data, &val))
5321 return trace_seq_printf(s, fmt, val);
5325 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
5329 static void free_func_handle(struct pevent_function_handler *func)
5331 struct pevent_func_params *params;
5335 while (func->params) {
5336 params = func->params;
5337 func->params = params->next;
5345 * pevent_register_print_function - register a helper function
5346 * @pevent: the handle to the pevent
5347 * @func: the function to process the helper function
5348 * @ret_type: the return type of the helper function
5349 * @name: the name of the helper function
5350 * @parameters: A list of enum pevent_func_arg_type
5352 * Some events may have helper functions in the print format arguments.
5353 * This allows a plugin to dynamically create a way to process one
5354 * of these functions.
5356 * The @parameters is a variable list of pevent_func_arg_type enums that
5357 * must end with PEVENT_FUNC_ARG_VOID.
5359 int pevent_register_print_function(struct pevent *pevent,
5360 pevent_func_handler func,
5361 enum pevent_func_arg_type ret_type,
5364 struct pevent_function_handler *func_handle;
5365 struct pevent_func_params **next_param;
5366 struct pevent_func_params *param;
5367 enum pevent_func_arg_type type;
5371 func_handle = find_func_handler(pevent, name);
5374 * This is most like caused by the users own
5375 * plugins updating the function. This overrides the
5378 pr_stat("override of function helper '%s'", name);
5379 remove_func_handler(pevent, name);
5382 func_handle = calloc(1, sizeof(*func_handle));
5384 do_warning("Failed to allocate function handler");
5385 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5388 func_handle->ret_type = ret_type;
5389 func_handle->name = strdup(name);
5390 func_handle->func = func;
5391 if (!func_handle->name) {
5392 do_warning("Failed to allocate function name");
5394 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5397 next_param = &(func_handle->params);
5400 type = va_arg(ap, enum pevent_func_arg_type);
5401 if (type == PEVENT_FUNC_ARG_VOID)
5404 if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
5405 do_warning("Invalid argument type %d", type);
5406 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
5410 param = malloc(sizeof(*param));
5412 do_warning("Failed to allocate function param");
5413 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5419 *next_param = param;
5420 next_param = &(param->next);
5422 func_handle->nr_args++;
5426 func_handle->next = pevent->func_handlers;
5427 pevent->func_handlers = func_handle;
5432 free_func_handle(func_handle);
5437 * pevent_register_event_handler - register a way to parse an event
5438 * @pevent: the handle to the pevent
5439 * @id: the id of the event to register
5440 * @sys_name: the system name the event belongs to
5441 * @event_name: the name of the event
5442 * @func: the function to call to parse the event information
5443 * @context: the data to be passed to @func
5445 * This function allows a developer to override the parsing of
5446 * a given event. If for some reason the default print format
5447 * is not sufficient, this function will register a function
5448 * for an event to be used to parse the data instead.
5450 * If @id is >= 0, then it is used to find the event.
5451 * else @sys_name and @event_name are used.
5453 int pevent_register_event_handler(struct pevent *pevent,
5454 int id, char *sys_name, char *event_name,
5455 pevent_event_handler_func func,
5458 struct event_format *event;
5459 struct event_handler *handle;
5463 event = pevent_find_event(pevent, id);
5466 if (event_name && (strcmp(event_name, event->name) != 0))
5468 if (sys_name && (strcmp(sys_name, event->system) != 0))
5471 event = pevent_find_event_by_name(pevent, sys_name, event_name);
5476 pr_stat("overriding event (%d) %s:%s with new print handler",
5477 event->id, event->system, event->name);
5479 event->handler = func;
5480 event->context = context;
5484 /* Save for later use. */
5485 handle = calloc(1, sizeof(*handle));
5487 do_warning("Failed to allocate event handler");
5488 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5493 handle->event_name = strdup(event_name);
5495 handle->sys_name = strdup(sys_name);
5497 if ((event_name && !handle->event_name) ||
5498 (sys_name && !handle->sys_name)) {
5499 do_warning("Failed to allocate event/sys name");
5500 free((void *)handle->event_name);
5501 free((void *)handle->sys_name);
5503 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5506 handle->func = func;
5507 handle->next = pevent->handlers;
5508 pevent->handlers = handle;
5509 handle->context = context;
5515 * pevent_alloc - create a pevent handle
5517 struct pevent *pevent_alloc(void)
5519 struct pevent *pevent = calloc(1, sizeof(*pevent));
5522 pevent->ref_count = 1;
5527 void pevent_ref(struct pevent *pevent)
5529 pevent->ref_count++;
5532 static void free_format_fields(struct format_field *field)
5534 struct format_field *next;
5545 static void free_formats(struct format *format)
5547 free_format_fields(format->common_fields);
5548 free_format_fields(format->fields);
5551 void pevent_free_format(struct event_format *event)
5554 free(event->system);
5556 free_formats(&event->format);
5558 free(event->print_fmt.format);
5559 free_args(event->print_fmt.args);
5565 * pevent_free - free a pevent handle
5566 * @pevent: the pevent handle to free
5568 void pevent_free(struct pevent *pevent)
5570 struct cmdline_list *cmdlist, *cmdnext;
5571 struct func_list *funclist, *funcnext;
5572 struct printk_list *printklist, *printknext;
5573 struct pevent_function_handler *func_handler;
5574 struct event_handler *handle;
5580 cmdlist = pevent->cmdlist;
5581 funclist = pevent->funclist;
5582 printklist = pevent->printklist;
5584 pevent->ref_count--;
5585 if (pevent->ref_count)
5588 if (pevent->cmdlines) {
5589 for (i = 0; i < pevent->cmdline_count; i++)
5590 free(pevent->cmdlines[i].comm);
5591 free(pevent->cmdlines);
5595 cmdnext = cmdlist->next;
5596 free(cmdlist->comm);
5601 if (pevent->func_map) {
5602 for (i = 0; i < (int)pevent->func_count; i++) {
5603 free(pevent->func_map[i].func);
5604 free(pevent->func_map[i].mod);
5606 free(pevent->func_map);
5610 funcnext = funclist->next;
5611 free(funclist->func);
5612 free(funclist->mod);
5614 funclist = funcnext;
5617 while (pevent->func_handlers) {
5618 func_handler = pevent->func_handlers;
5619 pevent->func_handlers = func_handler->next;
5620 free_func_handle(func_handler);
5623 if (pevent->printk_map) {
5624 for (i = 0; i < (int)pevent->printk_count; i++)
5625 free(pevent->printk_map[i].printk);
5626 free(pevent->printk_map);
5629 while (printklist) {
5630 printknext = printklist->next;
5631 free(printklist->printk);
5633 printklist = printknext;
5636 for (i = 0; i < pevent->nr_events; i++)
5637 pevent_free_format(pevent->events[i]);
5639 while (pevent->handlers) {
5640 handle = pevent->handlers;
5641 pevent->handlers = handle->next;
5642 free_handler(handle);
5645 free(pevent->events);
5646 free(pevent->sort_events);
5651 void pevent_unref(struct pevent *pevent)
5653 pevent_free(pevent);