2 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
21 * The parts for function graph printing was taken and modified from the
22 * Linux Kernel that were written by
23 * - Copyright (C) 2009 Frederic Weisbecker,
24 * Frederic Weisbecker gave his permission to relicense the code to
25 * the Lesser General Public License.
35 #include "event-parse.h"
36 #include "event-utils.h"
38 static const char *input_buf;
39 static unsigned long long input_buf_ptr;
40 static unsigned long long input_buf_siz;
42 static int is_flag_field;
43 static int is_symbolic_field;
45 static int show_warning = 1;
47 #define do_warning(fmt, ...) \
50 warning(fmt, ##__VA_ARGS__); \
53 static void init_input_buf(const char *buf, unsigned long long size)
60 const char *pevent_get_input_buf(void)
65 unsigned long long pevent_get_input_buf_ptr(void)
70 struct event_handler {
71 struct event_handler *next;
74 const char *event_name;
75 pevent_event_handler_func func;
79 struct pevent_func_params {
80 struct pevent_func_params *next;
81 enum pevent_func_arg_type type;
84 struct pevent_function_handler {
85 struct pevent_function_handler *next;
86 enum pevent_func_arg_type ret_type;
88 pevent_func_handler func;
89 struct pevent_func_params *params;
93 static unsigned long long
94 process_defined_func(struct trace_seq *s, void *data, int size,
95 struct event_format *event, struct print_arg *arg);
97 static void free_func_handle(struct pevent_function_handler *func);
100 * pevent_buffer_init - init buffer for parsing
101 * @buf: buffer to parse
102 * @size: the size of the buffer
104 * For use with pevent_read_token(), this initializes the internal
105 * buffer that pevent_read_token() will parse.
107 void pevent_buffer_init(const char *buf, unsigned long long size)
109 init_input_buf(buf, size);
112 void breakpoint(void)
118 struct print_arg *alloc_arg(void)
120 struct print_arg *arg;
122 arg = malloc_or_die(sizeof(*arg));
125 memset(arg, 0, sizeof(*arg));
135 static int cmdline_cmp(const void *a, const void *b)
137 const struct cmdline *ca = a;
138 const struct cmdline *cb = b;
140 if (ca->pid < cb->pid)
142 if (ca->pid > cb->pid)
148 struct cmdline_list {
149 struct cmdline_list *next;
154 static int cmdline_init(struct pevent *pevent)
156 struct cmdline_list *cmdlist = pevent->cmdlist;
157 struct cmdline_list *item;
158 struct cmdline *cmdlines;
161 cmdlines = malloc_or_die(sizeof(*cmdlines) * pevent->cmdline_count);
165 cmdlines[i].pid = cmdlist->pid;
166 cmdlines[i].comm = cmdlist->comm;
169 cmdlist = cmdlist->next;
173 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
175 pevent->cmdlines = cmdlines;
176 pevent->cmdlist = NULL;
181 static char *find_cmdline(struct pevent *pevent, int pid)
183 const struct cmdline *comm;
189 if (!pevent->cmdlines)
190 cmdline_init(pevent);
194 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
195 sizeof(*pevent->cmdlines), cmdline_cmp);
203 * pevent_pid_is_registered - return if a pid has a cmdline registered
204 * @pevent: handle for the pevent
205 * @pid: The pid to check if it has a cmdline registered with.
207 * Returns 1 if the pid has a cmdline mapped to it
210 int pevent_pid_is_registered(struct pevent *pevent, int pid)
212 const struct cmdline *comm;
218 if (!pevent->cmdlines)
219 cmdline_init(pevent);
223 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
224 sizeof(*pevent->cmdlines), cmdline_cmp);
232 * If the command lines have been converted to an array, then
233 * we must add this pid. This is much slower than when cmdlines
234 * are added before the array is initialized.
236 static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
238 struct cmdline *cmdlines = pevent->cmdlines;
239 const struct cmdline *cmdline;
245 /* avoid duplicates */
248 cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
249 sizeof(*pevent->cmdlines), cmdline_cmp);
255 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
261 cmdlines[pevent->cmdline_count].pid = pid;
262 cmdlines[pevent->cmdline_count].comm = strdup(comm);
263 if (!cmdlines[pevent->cmdline_count].comm)
266 if (cmdlines[pevent->cmdline_count].comm)
267 pevent->cmdline_count++;
269 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
270 pevent->cmdlines = cmdlines;
276 * pevent_register_comm - register a pid / comm mapping
277 * @pevent: handle for the pevent
278 * @comm: the command line to register
279 * @pid: the pid to map the command line to
281 * This adds a mapping to search for command line names with
282 * a given pid. The comm is duplicated.
284 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
286 struct cmdline_list *item;
288 if (pevent->cmdlines)
289 return add_new_comm(pevent, comm, pid);
291 item = malloc_or_die(sizeof(*item));
292 item->comm = strdup(comm);
296 item->next = pevent->cmdlist;
298 pevent->cmdlist = item;
299 pevent->cmdline_count++;
305 unsigned long long addr;
311 struct func_list *next;
312 unsigned long long addr;
317 static int func_cmp(const void *a, const void *b)
319 const struct func_map *fa = a;
320 const struct func_map *fb = b;
322 if (fa->addr < fb->addr)
324 if (fa->addr > fb->addr)
331 * We are searching for a record in between, not an exact
334 static int func_bcmp(const void *a, const void *b)
336 const struct func_map *fa = a;
337 const struct func_map *fb = b;
339 if ((fa->addr == fb->addr) ||
341 (fa->addr > fb->addr &&
342 fa->addr < (fb+1)->addr))
345 if (fa->addr < fb->addr)
351 static int func_map_init(struct pevent *pevent)
353 struct func_list *funclist;
354 struct func_list *item;
355 struct func_map *func_map;
358 func_map = malloc_or_die(sizeof(*func_map) * (pevent->func_count + 1));
359 funclist = pevent->funclist;
363 func_map[i].func = funclist->func;
364 func_map[i].addr = funclist->addr;
365 func_map[i].mod = funclist->mod;
368 funclist = funclist->next;
372 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
375 * Add a special record at the end.
377 func_map[pevent->func_count].func = NULL;
378 func_map[pevent->func_count].addr = 0;
379 func_map[pevent->func_count].mod = NULL;
381 pevent->func_map = func_map;
382 pevent->funclist = NULL;
387 static struct func_map *
388 find_func(struct pevent *pevent, unsigned long long addr)
390 struct func_map *func;
393 if (!pevent->func_map)
394 func_map_init(pevent);
398 func = bsearch(&key, pevent->func_map, pevent->func_count,
399 sizeof(*pevent->func_map), func_bcmp);
405 * pevent_find_function - find a function by a given address
406 * @pevent: handle for the pevent
407 * @addr: the address to find the function with
409 * Returns a pointer to the function stored that has the given
410 * address. Note, the address does not have to be exact, it
411 * will select the function that would contain the address.
413 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
415 struct func_map *map;
417 map = find_func(pevent, addr);
425 * pevent_find_function_address - find a function address by a given address
426 * @pevent: handle for the pevent
427 * @addr: the address to find the function with
429 * Returns the address the function starts at. This can be used in
430 * conjunction with pevent_find_function to print both the function
431 * name and the function offset.
434 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
436 struct func_map *map;
438 map = find_func(pevent, addr);
446 * pevent_register_function - register a function with a given address
447 * @pevent: handle for the pevent
448 * @function: the function name to register
449 * @addr: the address the function starts at
450 * @mod: the kernel module the function may be in (NULL for none)
452 * This registers a function name with an address and module.
453 * The @func passed in is duplicated.
455 int pevent_register_function(struct pevent *pevent, char *func,
456 unsigned long long addr, char *mod)
458 struct func_list *item;
460 item = malloc_or_die(sizeof(*item));
462 item->next = pevent->funclist;
463 item->func = strdup(func);
465 item->mod = strdup(mod);
470 pevent->funclist = item;
472 pevent->func_count++;
478 * pevent_print_funcs - print out the stored functions
479 * @pevent: handle for the pevent
481 * This prints out the stored functions.
483 void pevent_print_funcs(struct pevent *pevent)
487 if (!pevent->func_map)
488 func_map_init(pevent);
490 for (i = 0; i < (int)pevent->func_count; i++) {
492 pevent->func_map[i].addr,
493 pevent->func_map[i].func);
494 if (pevent->func_map[i].mod)
495 printf(" [%s]\n", pevent->func_map[i].mod);
502 unsigned long long addr;
507 struct printk_list *next;
508 unsigned long long addr;
512 static int printk_cmp(const void *a, const void *b)
514 const struct func_map *fa = a;
515 const struct func_map *fb = b;
517 if (fa->addr < fb->addr)
519 if (fa->addr > fb->addr)
525 static void printk_map_init(struct pevent *pevent)
527 struct printk_list *printklist;
528 struct printk_list *item;
529 struct printk_map *printk_map;
532 printk_map = malloc_or_die(sizeof(*printk_map) * (pevent->printk_count + 1));
534 printklist = pevent->printklist;
538 printk_map[i].printk = printklist->printk;
539 printk_map[i].addr = printklist->addr;
542 printklist = printklist->next;
546 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
548 pevent->printk_map = printk_map;
549 pevent->printklist = NULL;
552 static struct printk_map *
553 find_printk(struct pevent *pevent, unsigned long long addr)
555 struct printk_map *printk;
556 struct printk_map key;
558 if (!pevent->printk_map)
559 printk_map_init(pevent);
563 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
564 sizeof(*pevent->printk_map), printk_cmp);
570 * pevent_register_print_string - register a string by its address
571 * @pevent: handle for the pevent
572 * @fmt: the string format to register
573 * @addr: the address the string was located at
575 * This registers a string by the address it was stored in the kernel.
576 * The @fmt passed in is duplicated.
578 int pevent_register_print_string(struct pevent *pevent, char *fmt,
579 unsigned long long addr)
581 struct printk_list *item;
583 item = malloc_or_die(sizeof(*item));
585 item->next = pevent->printklist;
586 pevent->printklist = item;
587 item->printk = strdup(fmt);
590 pevent->printk_count++;
596 * pevent_print_printk - print out the stored strings
597 * @pevent: handle for the pevent
599 * This prints the string formats that were stored.
601 void pevent_print_printk(struct pevent *pevent)
605 if (!pevent->printk_map)
606 printk_map_init(pevent);
608 for (i = 0; i < (int)pevent->printk_count; i++) {
609 printf("%016llx %s\n",
610 pevent->printk_map[i].addr,
611 pevent->printk_map[i].printk);
615 static struct event_format *alloc_event(void)
617 struct event_format *event;
619 event = malloc_or_die(sizeof(*event));
620 memset(event, 0, sizeof(*event));
625 static void add_event(struct pevent *pevent, struct event_format *event)
630 pevent->events = malloc_or_die(sizeof(event));
633 realloc(pevent->events, sizeof(event) *
634 (pevent->nr_events + 1));
636 die("Can not allocate events");
638 for (i = 0; i < pevent->nr_events; i++) {
639 if (pevent->events[i]->id > event->id)
642 if (i < pevent->nr_events)
643 memmove(&pevent->events[i + 1],
645 sizeof(event) * (pevent->nr_events - i));
647 pevent->events[i] = event;
650 event->pevent = pevent;
653 static int event_item_type(enum event_type type)
656 case EVENT_ITEM ... EVENT_SQUOTE:
658 case EVENT_ERROR ... EVENT_DELIM:
664 static void free_flag_sym(struct print_flag_sym *fsym)
666 struct print_flag_sym *next;
677 static void free_arg(struct print_arg *arg)
679 struct print_arg *farg;
686 free(arg->atom.atom);
689 free(arg->field.name);
692 free_arg(arg->flags.field);
693 free(arg->flags.delim);
694 free_flag_sym(arg->flags.flags);
697 free_arg(arg->symbol.field);
698 free_flag_sym(arg->symbol.symbols);
701 free(arg->typecast.type);
702 free_arg(arg->typecast.item);
706 free(arg->string.string);
708 case PRINT_DYNAMIC_ARRAY:
709 free(arg->dynarray.index);
713 free_arg(arg->op.left);
714 free_arg(arg->op.right);
717 while (arg->func.args) {
718 farg = arg->func.args;
719 arg->func.args = farg->next;
732 static enum event_type get_type(int ch)
735 return EVENT_NEWLINE;
738 if (isalnum(ch) || ch == '_')
746 if (ch == '(' || ch == ')' || ch == ',')
752 static int __read_char(void)
754 if (input_buf_ptr >= input_buf_siz)
757 return input_buf[input_buf_ptr++];
760 static int __peek_char(void)
762 if (input_buf_ptr >= input_buf_siz)
765 return input_buf[input_buf_ptr];
769 * pevent_peek_char - peek at the next character that will be read
771 * Returns the next character read, or -1 if end of buffer.
773 int pevent_peek_char(void)
775 return __peek_char();
778 static enum event_type force_token(const char *str, char **tok);
780 static enum event_type __read_token(char **tok)
783 int ch, last_ch, quote_ch, next_ch;
786 enum event_type type;
796 if (type == EVENT_NONE)
804 *tok = malloc_or_die(2);
812 next_ch = __peek_char();
813 if (next_ch == '>') {
814 buf[i++] = __read_char();
827 buf[i++] = __read_char();
839 default: /* what should we do instead? */
849 buf[i++] = __read_char();
854 /* don't keep quotes */
860 if (i == (BUFSIZ - 1)) {
863 *tok = realloc(*tok, tok_size + BUFSIZ);
878 /* the '\' '\' will cancel itself */
879 if (ch == '\\' && last_ch == '\\')
881 } while (ch != quote_ch || last_ch == '\\');
882 /* remove the last quote */
886 * For strings (double quotes) check the next token.
887 * If it is another string, concatinate the two.
889 if (type == EVENT_DQUOTE) {
890 unsigned long long save_input_buf_ptr = input_buf_ptr;
894 } while (isspace(ch));
897 input_buf_ptr = save_input_buf_ptr;
902 case EVENT_ERROR ... EVENT_SPACE:
908 while (get_type(__peek_char()) == type) {
909 if (i == (BUFSIZ - 1)) {
912 *tok = realloc(*tok, tok_size + BUFSIZ);
931 *tok = realloc(*tok, tok_size + i);
940 if (type == EVENT_ITEM) {
942 * Older versions of the kernel has a bug that
943 * creates invalid symbols and will break the mac80211
944 * parsing. This is a work around to that bug.
946 * See Linux kernel commit:
947 * 811cb50baf63461ce0bdb234927046131fc7fa8b
949 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
952 return force_token("\"\%s\" ", tok);
953 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
956 return force_token("\" sta:%pM\" ", tok);
957 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
960 return force_token("\" vif:%p(%d)\" ", tok);
967 static enum event_type force_token(const char *str, char **tok)
969 const char *save_input_buf;
970 unsigned long long save_input_buf_ptr;
971 unsigned long long save_input_buf_siz;
972 enum event_type type;
974 /* save off the current input pointers */
975 save_input_buf = input_buf;
976 save_input_buf_ptr = input_buf_ptr;
977 save_input_buf_siz = input_buf_siz;
979 init_input_buf(str, strlen(str));
981 type = __read_token(tok);
983 /* reset back to original token */
984 input_buf = save_input_buf;
985 input_buf_ptr = save_input_buf_ptr;
986 input_buf_siz = save_input_buf_siz;
991 static void free_token(char *tok)
997 static enum event_type read_token(char **tok)
999 enum event_type type;
1002 type = __read_token(tok);
1003 if (type != EVENT_SPACE)
1015 * pevent_read_token - access to utilites to use the pevent parser
1016 * @tok: The token to return
1018 * This will parse tokens from the string given by
1019 * pevent_init_data().
1021 * Returns the token type.
1023 enum event_type pevent_read_token(char **tok)
1025 return read_token(tok);
1029 * pevent_free_token - free a token returned by pevent_read_token
1030 * @token: the token to free
1032 void pevent_free_token(char *token)
1038 static enum event_type read_token_item(char **tok)
1040 enum event_type type;
1043 type = __read_token(tok);
1044 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1055 static int test_type(enum event_type type, enum event_type expect)
1057 if (type != expect) {
1058 do_warning("Error: expected type %d but read %d",
1065 static int test_type_token(enum event_type type, const char *token,
1066 enum event_type expect, const char *expect_tok)
1068 if (type != expect) {
1069 do_warning("Error: expected type %d but read %d",
1074 if (strcmp(token, expect_tok) != 0) {
1075 do_warning("Error: expected '%s' but read '%s'",
1082 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1084 enum event_type type;
1087 type = read_token(tok);
1089 type = read_token_item(tok);
1090 return test_type(type, expect);
1093 static int read_expect_type(enum event_type expect, char **tok)
1095 return __read_expect_type(expect, tok, 1);
1098 static int __read_expected(enum event_type expect, const char *str,
1101 enum event_type type;
1106 type = read_token(&token);
1108 type = read_token_item(&token);
1110 ret = test_type_token(type, token, expect, str);
1117 static int read_expected(enum event_type expect, const char *str)
1119 return __read_expected(expect, str, 1);
1122 static int read_expected_item(enum event_type expect, const char *str)
1124 return __read_expected(expect, str, 0);
1127 static char *event_read_name(void)
1131 if (read_expected(EVENT_ITEM, "name") < 0)
1134 if (read_expected(EVENT_OP, ":") < 0)
1137 if (read_expect_type(EVENT_ITEM, &token) < 0)
1147 static int event_read_id(void)
1152 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1155 if (read_expected(EVENT_OP, ":") < 0)
1158 if (read_expect_type(EVENT_ITEM, &token) < 0)
1161 id = strtoul(token, NULL, 0);
1170 static int field_is_string(struct format_field *field)
1172 if ((field->flags & FIELD_IS_ARRAY) &&
1173 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1174 strstr(field->type, "s8")))
1180 static int field_is_dynamic(struct format_field *field)
1182 if (strncmp(field->type, "__data_loc", 10) == 0)
1188 static int field_is_long(struct format_field *field)
1190 /* includes long long */
1191 if (strstr(field->type, "long"))
1197 static int event_read_fields(struct event_format *event, struct format_field **fields)
1199 struct format_field *field = NULL;
1200 enum event_type type;
1206 type = read_token(&token);
1207 if (type == EVENT_NEWLINE) {
1214 if (test_type_token(type, token, EVENT_ITEM, "field"))
1218 type = read_token(&token);
1220 * The ftrace fields may still use the "special" name.
1223 if (event->flags & EVENT_FL_ISFTRACE &&
1224 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1226 type = read_token(&token);
1229 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1233 if (read_expect_type(EVENT_ITEM, &token) < 0)
1238 field = malloc_or_die(sizeof(*field));
1239 memset(field, 0, sizeof(*field));
1240 field->event = event;
1242 /* read the rest of the type */
1244 type = read_token(&token);
1245 if (type == EVENT_ITEM ||
1246 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1248 * Some of the ftrace fields are broken and have
1249 * an illegal "." in them.
1251 (event->flags & EVENT_FL_ISFTRACE &&
1252 type == EVENT_OP && strcmp(token, ".") == 0)) {
1254 if (strcmp(token, "*") == 0)
1255 field->flags |= FIELD_IS_POINTER;
1258 field->type = realloc(field->type,
1259 strlen(field->type) +
1260 strlen(last_token) + 2);
1261 strcat(field->type, " ");
1262 strcat(field->type, last_token);
1265 field->type = last_token;
1274 die("no type found");
1277 field->name = last_token;
1279 if (test_type(type, EVENT_OP))
1282 if (strcmp(token, "[") == 0) {
1283 enum event_type last_type = type;
1284 char *brackets = token;
1287 field->flags |= FIELD_IS_ARRAY;
1289 type = read_token(&token);
1291 if (type == EVENT_ITEM)
1292 field->arraylen = strtoul(token, NULL, 0);
1294 field->arraylen = 0;
1296 while (strcmp(token, "]") != 0) {
1297 if (last_type == EVENT_ITEM &&
1304 brackets = realloc(brackets,
1306 strlen(token) + len);
1308 strcat(brackets, " ");
1309 strcat(brackets, token);
1310 /* We only care about the last token */
1311 field->arraylen = strtoul(token, NULL, 0);
1313 type = read_token(&token);
1314 if (type == EVENT_NONE) {
1315 die("failed to find token");
1322 brackets = realloc(brackets, strlen(brackets) + 2);
1323 strcat(brackets, "]");
1325 /* add brackets to type */
1327 type = read_token(&token);
1329 * If the next token is not an OP, then it is of
1330 * the format: type [] item;
1332 if (type == EVENT_ITEM) {
1333 field->type = realloc(field->type,
1334 strlen(field->type) +
1335 strlen(field->name) +
1336 strlen(brackets) + 2);
1337 strcat(field->type, " ");
1338 strcat(field->type, field->name);
1339 free_token(field->name);
1340 strcat(field->type, brackets);
1341 field->name = token;
1342 type = read_token(&token);
1344 field->type = realloc(field->type,
1345 strlen(field->type) +
1346 strlen(brackets) + 1);
1347 strcat(field->type, brackets);
1352 if (field_is_string(field))
1353 field->flags |= FIELD_IS_STRING;
1354 if (field_is_dynamic(field))
1355 field->flags |= FIELD_IS_DYNAMIC;
1356 if (field_is_long(field))
1357 field->flags |= FIELD_IS_LONG;
1359 if (test_type_token(type, token, EVENT_OP, ";"))
1363 if (read_expected(EVENT_ITEM, "offset") < 0)
1366 if (read_expected(EVENT_OP, ":") < 0)
1369 if (read_expect_type(EVENT_ITEM, &token))
1371 field->offset = strtoul(token, NULL, 0);
1374 if (read_expected(EVENT_OP, ";") < 0)
1377 if (read_expected(EVENT_ITEM, "size") < 0)
1380 if (read_expected(EVENT_OP, ":") < 0)
1383 if (read_expect_type(EVENT_ITEM, &token))
1385 field->size = strtoul(token, NULL, 0);
1388 if (read_expected(EVENT_OP, ";") < 0)
1391 type = read_token(&token);
1392 if (type != EVENT_NEWLINE) {
1393 /* newer versions of the kernel have a "signed" type */
1394 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1399 if (read_expected(EVENT_OP, ":") < 0)
1402 if (read_expect_type(EVENT_ITEM, &token))
1405 /* add signed type */
1408 if (read_expected(EVENT_OP, ";") < 0)
1411 if (read_expect_type(EVENT_NEWLINE, &token))
1417 if (field->flags & FIELD_IS_ARRAY) {
1418 if (field->arraylen)
1419 field->elementsize = field->size / field->arraylen;
1420 else if (field->flags & FIELD_IS_STRING)
1421 field->elementsize = 1;
1423 field->elementsize = event->pevent->long_size;
1425 field->elementsize = field->size;
1428 fields = &field->next;
1445 static int event_read_format(struct event_format *event)
1450 if (read_expected_item(EVENT_ITEM, "format") < 0)
1453 if (read_expected(EVENT_OP, ":") < 0)
1456 if (read_expect_type(EVENT_NEWLINE, &token))
1460 ret = event_read_fields(event, &event->format.common_fields);
1463 event->format.nr_common = ret;
1465 ret = event_read_fields(event, &event->format.fields);
1468 event->format.nr_fields = ret;
1477 static enum event_type
1478 process_arg_token(struct event_format *event, struct print_arg *arg,
1479 char **tok, enum event_type type);
1481 static enum event_type
1482 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1484 enum event_type type;
1487 type = read_token(&token);
1490 return process_arg_token(event, arg, tok, type);
1493 static enum event_type
1494 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1496 static enum event_type
1497 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1499 struct print_arg *arg, *left, *right;
1500 enum event_type type;
1505 right = alloc_arg();
1507 arg->type = PRINT_OP;
1508 arg->op.left = left;
1509 arg->op.right = right;
1512 type = process_arg(event, left, &token);
1515 /* Handle other operations in the arguments */
1516 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1517 type = process_op(event, left, &token);
1521 if (test_type_token(type, token, EVENT_OP, ":"))
1526 type = process_arg(event, right, &token);
1528 top->op.right = arg;
1534 /* Top may point to itself */
1535 top->op.right = NULL;
1541 static enum event_type
1542 process_array(struct event_format *event, struct print_arg *top, char **tok)
1544 struct print_arg *arg;
1545 enum event_type type;
1551 type = process_arg(event, arg, &token);
1552 if (test_type_token(type, token, EVENT_OP, "]"))
1555 top->op.right = arg;
1558 type = read_token_item(&token);
1570 static int get_op_prio(char *op)
1584 /* '>>' and '<<' are 8 */
1588 /* '==' and '!=' are 10 */
1598 do_warning("unknown op '%c'", op[0]);
1602 if (strcmp(op, "++") == 0 ||
1603 strcmp(op, "--") == 0) {
1605 } else if (strcmp(op, ">>") == 0 ||
1606 strcmp(op, "<<") == 0) {
1608 } else if (strcmp(op, ">=") == 0 ||
1609 strcmp(op, "<=") == 0) {
1611 } else if (strcmp(op, "==") == 0 ||
1612 strcmp(op, "!=") == 0) {
1614 } else if (strcmp(op, "&&") == 0) {
1616 } else if (strcmp(op, "||") == 0) {
1619 do_warning("unknown op '%s'", op);
1625 static int set_op_prio(struct print_arg *arg)
1628 /* single ops are the greatest */
1629 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1632 arg->op.prio = get_op_prio(arg->op.op);
1634 return arg->op.prio;
1637 /* Note, *tok does not get freed, but will most likely be saved */
1638 static enum event_type
1639 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1641 struct print_arg *left, *right = NULL;
1642 enum event_type type;
1645 /* the op is passed in via tok */
1648 if (arg->type == PRINT_OP && !arg->op.left) {
1649 /* handle single op */
1651 die("bad op token %s", token);
1661 do_warning("bad op token %s", token);
1666 /* make an empty left */
1668 left->type = PRINT_NULL;
1669 arg->op.left = left;
1671 right = alloc_arg();
1672 arg->op.right = right;
1674 /* do not free the token, it belongs to an op */
1676 type = process_arg(event, right, tok);
1678 } else if (strcmp(token, "?") == 0) {
1681 /* copy the top arg to the left */
1684 arg->type = PRINT_OP;
1686 arg->op.left = left;
1689 type = process_cond(event, arg, tok);
1691 } else if (strcmp(token, ">>") == 0 ||
1692 strcmp(token, "<<") == 0 ||
1693 strcmp(token, "&") == 0 ||
1694 strcmp(token, "|") == 0 ||
1695 strcmp(token, "&&") == 0 ||
1696 strcmp(token, "||") == 0 ||
1697 strcmp(token, "-") == 0 ||
1698 strcmp(token, "+") == 0 ||
1699 strcmp(token, "*") == 0 ||
1700 strcmp(token, "^") == 0 ||
1701 strcmp(token, "/") == 0 ||
1702 strcmp(token, "<") == 0 ||
1703 strcmp(token, ">") == 0 ||
1704 strcmp(token, "==") == 0 ||
1705 strcmp(token, "!=") == 0) {
1709 /* copy the top arg to the left */
1712 arg->type = PRINT_OP;
1714 arg->op.left = left;
1716 if (set_op_prio(arg) == -1) {
1717 event->flags |= EVENT_FL_FAILED;
1718 /* arg->op.op (= token) will be freed at out_free */
1723 type = read_token_item(&token);
1726 /* could just be a type pointer */
1727 if ((strcmp(arg->op.op, "*") == 0) &&
1728 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1729 if (left->type != PRINT_ATOM)
1730 die("bad pointer type");
1731 left->atom.atom = realloc(left->atom.atom,
1732 strlen(left->atom.atom) + 3);
1733 strcat(left->atom.atom, " *");
1741 right = alloc_arg();
1742 type = process_arg_token(event, right, tok, type);
1743 arg->op.right = right;
1745 } else if (strcmp(token, "[") == 0) {
1750 arg->type = PRINT_OP;
1752 arg->op.left = left;
1756 type = process_array(event, arg, tok);
1759 do_warning("unknown op '%s'", token);
1760 event->flags |= EVENT_FL_FAILED;
1761 /* the arg is now the left side */
1765 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
1768 /* higher prios need to be closer to the root */
1769 prio = get_op_prio(*tok);
1771 if (prio > arg->op.prio)
1772 return process_op(event, arg, tok);
1774 return process_op(event, right, tok);
1785 static enum event_type
1786 process_entry(struct event_format *event __unused, struct print_arg *arg,
1789 enum event_type type;
1793 if (read_expected(EVENT_OP, "->") < 0)
1796 if (read_expect_type(EVENT_ITEM, &token) < 0)
1800 arg->type = PRINT_FIELD;
1801 arg->field.name = field;
1803 if (is_flag_field) {
1804 arg->field.field = pevent_find_any_field(event, arg->field.name);
1805 arg->field.field->flags |= FIELD_IS_FLAG;
1807 } else if (is_symbolic_field) {
1808 arg->field.field = pevent_find_any_field(event, arg->field.name);
1809 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
1810 is_symbolic_field = 0;
1813 type = read_token(&token);
1825 static char *arg_eval (struct print_arg *arg);
1827 static unsigned long long
1828 eval_type_str(unsigned long long val, const char *type, int pointer)
1838 if (type[len-1] != '*') {
1839 do_warning("pointer expected with non pointer type");
1843 ref = malloc_or_die(len);
1844 memcpy(ref, type, len);
1846 /* chop off the " *" */
1849 val = eval_type_str(val, ref, 0);
1854 /* check if this is a pointer */
1855 if (type[len - 1] == '*')
1858 /* Try to figure out the arg size*/
1859 if (strncmp(type, "struct", 6) == 0)
1863 if (strcmp(type, "u8") == 0)
1866 if (strcmp(type, "u16") == 0)
1867 return val & 0xffff;
1869 if (strcmp(type, "u32") == 0)
1870 return val & 0xffffffff;
1872 if (strcmp(type, "u64") == 0 ||
1873 strcmp(type, "s64"))
1876 if (strcmp(type, "s8") == 0)
1877 return (unsigned long long)(char)val & 0xff;
1879 if (strcmp(type, "s16") == 0)
1880 return (unsigned long long)(short)val & 0xffff;
1882 if (strcmp(type, "s32") == 0)
1883 return (unsigned long long)(int)val & 0xffffffff;
1885 if (strncmp(type, "unsigned ", 9) == 0) {
1890 if (strcmp(type, "char") == 0) {
1892 return (unsigned long long)(char)val & 0xff;
1897 if (strcmp(type, "short") == 0) {
1899 return (unsigned long long)(short)val & 0xffff;
1901 return val & 0xffff;
1904 if (strcmp(type, "int") == 0) {
1906 return (unsigned long long)(int)val & 0xffffffff;
1908 return val & 0xffffffff;
1915 * Try to figure out the type.
1917 static unsigned long long
1918 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
1920 if (arg->type != PRINT_TYPE)
1921 die("expected type argument");
1923 return eval_type_str(val, arg->typecast.type, pointer);
1926 static int arg_num_eval(struct print_arg *arg, long long *val)
1928 long long left, right;
1931 switch (arg->type) {
1933 *val = strtoll(arg->atom.atom, NULL, 0);
1936 ret = arg_num_eval(arg->typecast.item, val);
1939 *val = eval_type(*val, arg, 0);
1942 switch (arg->op.op[0]) {
1944 ret = arg_num_eval(arg->op.left, &left);
1947 ret = arg_num_eval(arg->op.right, &right);
1951 *val = left || right;
1953 *val = left | right;
1956 ret = arg_num_eval(arg->op.left, &left);
1959 ret = arg_num_eval(arg->op.right, &right);
1963 *val = left && right;
1965 *val = left & right;
1968 ret = arg_num_eval(arg->op.left, &left);
1971 ret = arg_num_eval(arg->op.right, &right);
1974 switch (arg->op.op[1]) {
1976 *val = left < right;
1979 *val = left << right;
1982 *val = left <= right;
1985 do_warning("unknown op '%s'", arg->op.op);
1990 ret = arg_num_eval(arg->op.left, &left);
1993 ret = arg_num_eval(arg->op.right, &right);
1996 switch (arg->op.op[1]) {
1998 *val = left > right;
2001 *val = left >> right;
2004 *val = left >= right;
2007 do_warning("unknown op '%s'", arg->op.op);
2012 ret = arg_num_eval(arg->op.left, &left);
2015 ret = arg_num_eval(arg->op.right, &right);
2019 if (arg->op.op[1] != '=') {
2020 do_warning("unknown op '%s'", arg->op.op);
2023 *val = left == right;
2026 ret = arg_num_eval(arg->op.left, &left);
2029 ret = arg_num_eval(arg->op.right, &right);
2033 switch (arg->op.op[1]) {
2035 *val = left != right;
2038 do_warning("unknown op '%s'", arg->op.op);
2043 /* check for negative */
2044 if (arg->op.left->type == PRINT_NULL)
2047 ret = arg_num_eval(arg->op.left, &left);
2050 ret = arg_num_eval(arg->op.right, &right);
2053 *val = left - right;
2056 if (arg->op.left->type == PRINT_NULL)
2059 ret = arg_num_eval(arg->op.left, &left);
2062 ret = arg_num_eval(arg->op.right, &right);
2065 *val = left + right;
2068 do_warning("unknown op '%s'", arg->op.op);
2074 case PRINT_FIELD ... PRINT_SYMBOL:
2078 do_warning("invalid eval type %d", arg->type);
2085 static char *arg_eval (struct print_arg *arg)
2088 static char buf[20];
2090 switch (arg->type) {
2092 return arg->atom.atom;
2094 return arg_eval(arg->typecast.item);
2096 if (!arg_num_eval(arg, &val))
2098 sprintf(buf, "%lld", val);
2102 case PRINT_FIELD ... PRINT_SYMBOL:
2106 die("invalid eval type %d", arg->type);
2113 static enum event_type
2114 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2116 enum event_type type;
2117 struct print_arg *arg = NULL;
2118 struct print_flag_sym *field;
2124 type = read_token_item(&token);
2125 if (test_type_token(type, token, EVENT_OP, "{"))
2131 type = process_arg(event, arg, &token);
2133 if (type == EVENT_OP)
2134 type = process_op(event, arg, &token);
2136 if (type == EVENT_ERROR)
2139 if (test_type_token(type, token, EVENT_DELIM, ","))
2142 field = malloc_or_die(sizeof(*field));
2143 memset(field, 0, sizeof(*field));
2145 value = arg_eval(arg);
2148 field->value = strdup(value);
2154 type = process_arg(event, arg, &token);
2155 if (test_type_token(type, token, EVENT_OP, "}"))
2158 value = arg_eval(arg);
2161 field->str = strdup(value);
2166 list = &field->next;
2169 type = read_token_item(&token);
2170 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2183 static enum event_type
2184 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2186 struct print_arg *field;
2187 enum event_type type;
2190 memset(arg, 0, sizeof(*arg));
2191 arg->type = PRINT_FLAGS;
2193 field = alloc_arg();
2195 type = process_arg(event, field, &token);
2197 /* Handle operations in the first argument */
2198 while (type == EVENT_OP)
2199 type = process_op(event, field, &token);
2201 if (test_type_token(type, token, EVENT_DELIM, ","))
2205 arg->flags.field = field;
2207 type = read_token_item(&token);
2208 if (event_item_type(type)) {
2209 arg->flags.delim = token;
2210 type = read_token_item(&token);
2213 if (test_type_token(type, token, EVENT_DELIM, ","))
2216 type = process_fields(event, &arg->flags.flags, &token);
2217 if (test_type_token(type, token, EVENT_DELIM, ")"))
2221 type = read_token_item(tok);
2230 static enum event_type
2231 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2233 struct print_arg *field;
2234 enum event_type type;
2237 memset(arg, 0, sizeof(*arg));
2238 arg->type = PRINT_SYMBOL;
2240 field = alloc_arg();
2242 type = process_arg(event, field, &token);
2243 if (test_type_token(type, token, EVENT_DELIM, ","))
2246 arg->symbol.field = field;
2248 type = process_fields(event, &arg->symbol.symbols, &token);
2249 if (test_type_token(type, token, EVENT_DELIM, ")"))
2253 type = read_token_item(tok);
2262 static enum event_type
2263 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2265 struct format_field *field;
2266 enum event_type type;
2269 memset(arg, 0, sizeof(*arg));
2270 arg->type = PRINT_DYNAMIC_ARRAY;
2273 * The item within the parenthesis is another field that holds
2274 * the index into where the array starts.
2276 type = read_token(&token);
2278 if (type != EVENT_ITEM)
2281 /* Find the field */
2283 field = pevent_find_field(event, token);
2287 arg->dynarray.field = field;
2288 arg->dynarray.index = 0;
2290 if (read_expected(EVENT_DELIM, ")") < 0)
2294 type = read_token_item(&token);
2296 if (type != EVENT_OP || strcmp(token, "[") != 0)
2301 type = process_arg(event, arg, &token);
2302 if (type == EVENT_ERROR)
2305 if (!test_type_token(type, token, EVENT_OP, "]"))
2309 type = read_token_item(tok);
2320 static enum event_type
2321 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2323 struct print_arg *item_arg;
2324 enum event_type type;
2327 type = process_arg(event, arg, &token);
2329 if (type == EVENT_ERROR)
2332 if (type == EVENT_OP)
2333 type = process_op(event, arg, &token);
2335 if (type == EVENT_ERROR)
2338 if (test_type_token(type, token, EVENT_DELIM, ")"))
2342 type = read_token_item(&token);
2345 * If the next token is an item or another open paren, then
2346 * this was a typecast.
2348 if (event_item_type(type) ||
2349 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2351 /* make this a typecast and contine */
2353 /* prevous must be an atom */
2354 if (arg->type != PRINT_ATOM)
2355 die("previous needed to be PRINT_ATOM");
2357 item_arg = alloc_arg();
2359 arg->type = PRINT_TYPE;
2360 arg->typecast.type = arg->atom.atom;
2361 arg->typecast.item = item_arg;
2362 type = process_arg_token(event, item_arg, &token, type);
2376 static enum event_type
2377 process_str(struct event_format *event __unused, struct print_arg *arg, char **tok)
2379 enum event_type type;
2382 if (read_expect_type(EVENT_ITEM, &token) < 0)
2385 arg->type = PRINT_STRING;
2386 arg->string.string = token;
2387 arg->string.offset = -1;
2389 if (read_expected(EVENT_DELIM, ")") < 0)
2392 type = read_token(&token);
2404 static struct pevent_function_handler *
2405 find_func_handler(struct pevent *pevent, char *func_name)
2407 struct pevent_function_handler *func;
2409 for (func = pevent->func_handlers; func; func = func->next) {
2410 if (strcmp(func->name, func_name) == 0)
2417 static void remove_func_handler(struct pevent *pevent, char *func_name)
2419 struct pevent_function_handler *func;
2420 struct pevent_function_handler **next;
2422 next = &pevent->func_handlers;
2423 while ((func = *next)) {
2424 if (strcmp(func->name, func_name) == 0) {
2426 free_func_handle(func);
2433 static enum event_type
2434 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2435 struct print_arg *arg, char **tok)
2437 struct print_arg **next_arg;
2438 struct print_arg *farg;
2439 enum event_type type;
2444 arg->type = PRINT_FUNC;
2445 arg->func.func = func;
2449 next_arg = &(arg->func.args);
2450 for (i = 0; i < func->nr_args; i++) {
2452 type = process_arg(event, farg, &token);
2453 if (i < (func->nr_args - 1))
2458 if (test_type_token(type, token, EVENT_DELIM, test)) {
2465 next_arg = &(farg->next);
2469 type = read_token(&token);
2475 static enum event_type
2476 process_function(struct event_format *event, struct print_arg *arg,
2477 char *token, char **tok)
2479 struct pevent_function_handler *func;
2481 if (strcmp(token, "__print_flags") == 0) {
2484 return process_flags(event, arg, tok);
2486 if (strcmp(token, "__print_symbolic") == 0) {
2488 is_symbolic_field = 1;
2489 return process_symbols(event, arg, tok);
2491 if (strcmp(token, "__get_str") == 0) {
2493 return process_str(event, arg, tok);
2495 if (strcmp(token, "__get_dynamic_array") == 0) {
2497 return process_dynamic_array(event, arg, tok);
2500 func = find_func_handler(event->pevent, token);
2503 return process_func_handler(event, func, arg, tok);
2506 do_warning("function %s not defined", token);
2511 static enum event_type
2512 process_arg_token(struct event_format *event, struct print_arg *arg,
2513 char **tok, enum event_type type)
2522 if (strcmp(token, "REC") == 0) {
2524 type = process_entry(event, arg, &token);
2528 /* test the next token */
2529 type = read_token_item(&token);
2532 * If the next token is a parenthesis, then this
2535 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
2538 /* this will free atom. */
2539 type = process_function(event, arg, atom, &token);
2542 /* atoms can be more than one token long */
2543 while (type == EVENT_ITEM) {
2544 atom = realloc(atom, strlen(atom) + strlen(token) + 2);
2546 strcat(atom, token);
2548 type = read_token_item(&token);
2551 arg->type = PRINT_ATOM;
2552 arg->atom.atom = atom;
2557 arg->type = PRINT_ATOM;
2558 arg->atom.atom = token;
2559 type = read_token_item(&token);
2562 if (strcmp(token, "(") == 0) {
2564 type = process_paren(event, arg, &token);
2568 /* handle single ops */
2569 arg->type = PRINT_OP;
2571 arg->op.left = NULL;
2572 type = process_op(event, arg, &token);
2574 /* On error, the op is freed */
2575 if (type == EVENT_ERROR)
2578 /* return error type if errored */
2581 case EVENT_ERROR ... EVENT_NEWLINE:
2583 die("unexpected type %d", type);
2590 static int event_read_print_args(struct event_format *event, struct print_arg **list)
2592 enum event_type type = EVENT_ERROR;
2593 struct print_arg *arg;
2598 if (type == EVENT_NEWLINE) {
2599 type = read_token_item(&token);
2605 type = process_arg(event, arg, &token);
2607 if (type == EVENT_ERROR) {
2616 if (type == EVENT_OP) {
2617 type = process_op(event, arg, &token);
2619 if (type == EVENT_ERROR) {
2628 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
2635 } while (type != EVENT_NONE);
2637 if (type != EVENT_NONE && type != EVENT_ERROR)
2643 static int event_read_print(struct event_format *event)
2645 enum event_type type;
2649 if (read_expected_item(EVENT_ITEM, "print") < 0)
2652 if (read_expected(EVENT_ITEM, "fmt") < 0)
2655 if (read_expected(EVENT_OP, ":") < 0)
2658 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
2662 event->print_fmt.format = token;
2663 event->print_fmt.args = NULL;
2665 /* ok to have no arg */
2666 type = read_token_item(&token);
2668 if (type == EVENT_NONE)
2671 /* Handle concatenation of print lines */
2672 if (type == EVENT_DQUOTE) {
2675 cat = malloc_or_die(strlen(event->print_fmt.format) +
2677 strcpy(cat, event->print_fmt.format);
2680 free_token(event->print_fmt.format);
2681 event->print_fmt.format = NULL;
2686 if (test_type_token(type, token, EVENT_DELIM, ","))
2691 ret = event_read_print_args(event, &event->print_fmt.args);
2703 * pevent_find_common_field - return a common field by event
2704 * @event: handle for the event
2705 * @name: the name of the common field to return
2707 * Returns a common field from the event by the given @name.
2708 * This only searchs the common fields and not all field.
2710 struct format_field *
2711 pevent_find_common_field(struct event_format *event, const char *name)
2713 struct format_field *format;
2715 for (format = event->format.common_fields;
2716 format; format = format->next) {
2717 if (strcmp(format->name, name) == 0)
2725 * pevent_find_field - find a non-common field
2726 * @event: handle for the event
2727 * @name: the name of the non-common field
2729 * Returns a non-common field by the given @name.
2730 * This does not search common fields.
2732 struct format_field *
2733 pevent_find_field(struct event_format *event, const char *name)
2735 struct format_field *format;
2737 for (format = event->format.fields;
2738 format; format = format->next) {
2739 if (strcmp(format->name, name) == 0)
2747 * pevent_find_any_field - find any field by name
2748 * @event: handle for the event
2749 * @name: the name of the field
2751 * Returns a field by the given @name.
2752 * This searchs the common field names first, then
2753 * the non-common ones if a common one was not found.
2755 struct format_field *
2756 pevent_find_any_field(struct event_format *event, const char *name)
2758 struct format_field *format;
2760 format = pevent_find_common_field(event, name);
2763 return pevent_find_field(event, name);
2767 * pevent_read_number - read a number from data
2768 * @pevent: handle for the pevent
2769 * @ptr: the raw data
2770 * @size: the size of the data that holds the number
2772 * Returns the number (converted to host) from the
2775 unsigned long long pevent_read_number(struct pevent *pevent,
2776 const void *ptr, int size)
2780 return *(unsigned char *)ptr;
2782 return data2host2(pevent, ptr);
2784 return data2host4(pevent, ptr);
2786 return data2host8(pevent, ptr);
2794 * pevent_read_number_field - read a number from data
2795 * @field: a handle to the field
2796 * @data: the raw data to read
2797 * @value: the value to place the number in
2799 * Reads raw data according to a field offset and size,
2800 * and translates it into @value.
2802 * Returns 0 on success, -1 otherwise.
2804 int pevent_read_number_field(struct format_field *field, const void *data,
2805 unsigned long long *value)
2809 switch (field->size) {
2814 *value = pevent_read_number(field->event->pevent,
2815 data + field->offset, field->size);
2822 static int get_common_info(struct pevent *pevent,
2823 const char *type, int *offset, int *size)
2825 struct event_format *event;
2826 struct format_field *field;
2829 * All events should have the same common elements.
2830 * Pick any event to find where the type is;
2832 if (!pevent->events)
2833 die("no event_list!");
2835 event = pevent->events[0];
2836 field = pevent_find_common_field(event, type);
2838 die("field '%s' not found", type);
2840 *offset = field->offset;
2841 *size = field->size;
2846 static int __parse_common(struct pevent *pevent, void *data,
2847 int *size, int *offset, const char *name)
2852 ret = get_common_info(pevent, name, offset, size);
2856 return pevent_read_number(pevent, data + *offset, *size);
2859 static int trace_parse_common_type(struct pevent *pevent, void *data)
2861 return __parse_common(pevent, data,
2862 &pevent->type_size, &pevent->type_offset,
2866 static int parse_common_pid(struct pevent *pevent, void *data)
2868 return __parse_common(pevent, data,
2869 &pevent->pid_size, &pevent->pid_offset,
2873 static int parse_common_pc(struct pevent *pevent, void *data)
2875 return __parse_common(pevent, data,
2876 &pevent->pc_size, &pevent->pc_offset,
2877 "common_preempt_count");
2880 static int parse_common_flags(struct pevent *pevent, void *data)
2882 return __parse_common(pevent, data,
2883 &pevent->flags_size, &pevent->flags_offset,
2887 static int parse_common_lock_depth(struct pevent *pevent, void *data)
2891 ret = __parse_common(pevent, data,
2892 &pevent->ld_size, &pevent->ld_offset,
2893 "common_lock_depth");
2900 static int events_id_cmp(const void *a, const void *b);
2903 * pevent_find_event - find an event by given id
2904 * @pevent: a handle to the pevent
2905 * @id: the id of the event
2907 * Returns an event that has a given @id.
2909 struct event_format *pevent_find_event(struct pevent *pevent, int id)
2911 struct event_format **eventptr;
2912 struct event_format key;
2913 struct event_format *pkey = &key;
2915 /* Check cache first */
2916 if (pevent->last_event && pevent->last_event->id == id)
2917 return pevent->last_event;
2921 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
2922 sizeof(*pevent->events), events_id_cmp);
2925 pevent->last_event = *eventptr;
2933 * pevent_find_event_by_name - find an event by given name
2934 * @pevent: a handle to the pevent
2935 * @sys: the system name to search for
2936 * @name: the name of the event to search for
2938 * This returns an event with a given @name and under the system
2939 * @sys. If @sys is NULL the first event with @name is returned.
2941 struct event_format *
2942 pevent_find_event_by_name(struct pevent *pevent,
2943 const char *sys, const char *name)
2945 struct event_format *event;
2948 if (pevent->last_event &&
2949 strcmp(pevent->last_event->name, name) == 0 &&
2950 (!sys || strcmp(pevent->last_event->system, sys) == 0))
2951 return pevent->last_event;
2953 for (i = 0; i < pevent->nr_events; i++) {
2954 event = pevent->events[i];
2955 if (strcmp(event->name, name) == 0) {
2958 if (strcmp(event->system, sys) == 0)
2962 if (i == pevent->nr_events)
2965 pevent->last_event = event;
2969 static unsigned long long
2970 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
2972 struct pevent *pevent = event->pevent;
2973 unsigned long long val = 0;
2974 unsigned long long left, right;
2975 struct print_arg *typearg = NULL;
2976 struct print_arg *larg;
2977 unsigned long offset;
2978 unsigned int field_size;
2980 switch (arg->type) {
2985 return strtoull(arg->atom.atom, NULL, 0);
2987 if (!arg->field.field) {
2988 arg->field.field = pevent_find_any_field(event, arg->field.name);
2989 if (!arg->field.field)
2990 die("field %s not found", arg->field.name);
2992 /* must be a number */
2993 val = pevent_read_number(pevent, data + arg->field.field->offset,
2994 arg->field.field->size);
3000 val = eval_num_arg(data, size, event, arg->typecast.item);
3001 return eval_type(val, arg, 0);
3008 val = process_defined_func(&s, data, size, event, arg);
3009 trace_seq_destroy(&s);
3013 if (strcmp(arg->op.op, "[") == 0) {
3015 * Arrays are special, since we don't want
3016 * to read the arg as is.
3018 right = eval_num_arg(data, size, event, arg->op.right);
3020 /* handle typecasts */
3021 larg = arg->op.left;
3022 while (larg->type == PRINT_TYPE) {
3025 larg = larg->typecast.item;
3028 /* Default to long size */
3029 field_size = pevent->long_size;
3031 switch (larg->type) {
3032 case PRINT_DYNAMIC_ARRAY:
3033 offset = pevent_read_number(pevent,
3034 data + larg->dynarray.field->offset,
3035 larg->dynarray.field->size);
3036 if (larg->dynarray.field->elementsize)
3037 field_size = larg->dynarray.field->elementsize;
3039 * The actual length of the dynamic array is stored
3040 * in the top half of the field, and the offset
3041 * is in the bottom half of the 32 bit field.
3047 if (!larg->field.field) {
3049 pevent_find_any_field(event, larg->field.name);
3050 if (!larg->field.field)
3051 die("field %s not found", larg->field.name);
3053 field_size = larg->field.field->elementsize;
3054 offset = larg->field.field->offset +
3055 right * larg->field.field->elementsize;
3058 goto default_op; /* oops, all bets off */
3060 val = pevent_read_number(pevent,
3061 data + offset, field_size);
3063 val = eval_type(val, typearg, 1);
3065 } else if (strcmp(arg->op.op, "?") == 0) {
3066 left = eval_num_arg(data, size, event, arg->op.left);
3067 arg = arg->op.right;
3069 val = eval_num_arg(data, size, event, arg->op.left);
3071 val = eval_num_arg(data, size, event, arg->op.right);
3075 left = eval_num_arg(data, size, event, arg->op.left);
3076 right = eval_num_arg(data, size, event, arg->op.right);
3077 switch (arg->op.op[0]) {
3079 switch (arg->op.op[1]) {
3084 val = left != right;
3087 die("unknown op '%s'", arg->op.op);
3095 val = left || right;
3101 val = left && right;
3106 switch (arg->op.op[1]) {
3111 val = left << right;
3114 val = left <= right;
3117 die("unknown op '%s'", arg->op.op);
3121 switch (arg->op.op[1]) {
3126 val = left >> right;
3129 val = left >= right;
3132 die("unknown op '%s'", arg->op.op);
3136 if (arg->op.op[1] != '=')
3137 die("unknown op '%s'", arg->op.op);
3138 val = left == right;
3153 die("unknown op '%s'", arg->op.op);
3156 default: /* not sure what to do there */
3164 unsigned long long value;
3167 static const struct flag flags[] = {
3168 { "HI_SOFTIRQ", 0 },
3169 { "TIMER_SOFTIRQ", 1 },
3170 { "NET_TX_SOFTIRQ", 2 },
3171 { "NET_RX_SOFTIRQ", 3 },
3172 { "BLOCK_SOFTIRQ", 4 },
3173 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3174 { "TASKLET_SOFTIRQ", 6 },
3175 { "SCHED_SOFTIRQ", 7 },
3176 { "HRTIMER_SOFTIRQ", 8 },
3177 { "RCU_SOFTIRQ", 9 },
3179 { "HRTIMER_NORESTART", 0 },
3180 { "HRTIMER_RESTART", 1 },
3183 static unsigned long long eval_flag(const char *flag)
3188 * Some flags in the format files do not get converted.
3189 * If the flag is not numeric, see if it is something that
3190 * we already know about.
3192 if (isdigit(flag[0]))
3193 return strtoull(flag, NULL, 0);
3195 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3196 if (strcmp(flags[i].name, flag) == 0)
3197 return flags[i].value;
3202 static void print_str_to_seq(struct trace_seq *s, const char *format,
3203 int len_arg, const char *str)
3206 trace_seq_printf(s, format, len_arg, str);
3208 trace_seq_printf(s, format, str);
3211 static void print_str_arg(struct trace_seq *s, void *data, int size,
3212 struct event_format *event, const char *format,
3213 int len_arg, struct print_arg *arg)
3215 struct pevent *pevent = event->pevent;
3216 struct print_flag_sym *flag;
3217 unsigned long long val, fval;
3223 switch (arg->type) {
3228 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3231 if (!arg->field.field) {
3232 arg->field.field = pevent_find_any_field(event, arg->field.name);
3233 if (!arg->field.field)
3234 die("field %s not found", arg->field.name);
3236 /* Zero sized fields, mean the rest of the data */
3237 len = arg->field.field->size ? : size - arg->field.field->offset;
3240 * Some events pass in pointers. If this is not an array
3241 * and the size is the same as long_size, assume that it
3244 if (!(arg->field.field->flags & FIELD_IS_ARRAY) &&
3245 arg->field.field->size == pevent->long_size) {
3246 addr = *(unsigned long *)(data + arg->field.field->offset);
3247 trace_seq_printf(s, "%lx", addr);
3250 str = malloc_or_die(len + 1);
3251 memcpy(str, data + arg->field.field->offset, len);
3253 print_str_to_seq(s, format, len_arg, str);
3257 val = eval_num_arg(data, size, event, arg->flags.field);
3259 for (flag = arg->flags.flags; flag; flag = flag->next) {
3260 fval = eval_flag(flag->value);
3261 if (!val && !fval) {
3262 print_str_to_seq(s, format, len_arg, flag->str);
3265 if (fval && (val & fval) == fval) {
3266 if (print && arg->flags.delim)
3267 trace_seq_puts(s, arg->flags.delim);
3268 print_str_to_seq(s, format, len_arg, flag->str);
3275 val = eval_num_arg(data, size, event, arg->symbol.field);
3276 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3277 fval = eval_flag(flag->value);
3279 print_str_to_seq(s, format, len_arg, flag->str);
3287 case PRINT_STRING: {
3290 if (arg->string.offset == -1) {
3291 struct format_field *f;
3293 f = pevent_find_any_field(event, arg->string.string);
3294 arg->string.offset = f->offset;
3296 str_offset = data2host4(pevent, data + arg->string.offset);
3297 str_offset &= 0xffff;
3298 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
3302 trace_seq_printf(s, format, arg->string.string);
3306 * The only op for string should be ? :
3308 if (arg->op.op[0] != '?')
3310 val = eval_num_arg(data, size, event, arg->op.left);
3312 print_str_arg(s, data, size, event,
3313 format, len_arg, arg->op.right->op.left);
3315 print_str_arg(s, data, size, event,
3316 format, len_arg, arg->op.right->op.right);
3319 process_defined_func(s, data, size, event, arg);
3327 static unsigned long long
3328 process_defined_func(struct trace_seq *s, void *data, int size,
3329 struct event_format *event, struct print_arg *arg)
3331 struct pevent_function_handler *func_handle = arg->func.func;
3332 struct pevent_func_params *param;
3333 unsigned long long *args;
3334 unsigned long long ret;
3335 struct print_arg *farg;
3336 struct trace_seq str;
3338 struct save_str *next;
3340 } *strings = NULL, *string;
3343 if (!func_handle->nr_args) {
3344 ret = (*func_handle->func)(s, NULL);
3348 farg = arg->func.args;
3349 param = func_handle->params;
3351 args = malloc_or_die(sizeof(*args) * func_handle->nr_args);
3352 for (i = 0; i < func_handle->nr_args; i++) {
3353 switch (param->type) {
3354 case PEVENT_FUNC_ARG_INT:
3355 case PEVENT_FUNC_ARG_LONG:
3356 case PEVENT_FUNC_ARG_PTR:
3357 args[i] = eval_num_arg(data, size, event, farg);
3359 case PEVENT_FUNC_ARG_STRING:
3360 trace_seq_init(&str);
3361 print_str_arg(&str, data, size, event, "%s", -1, farg);
3362 trace_seq_terminate(&str);
3363 string = malloc_or_die(sizeof(*string));
3364 string->next = strings;
3365 string->str = strdup(str.buffer);
3367 trace_seq_destroy(&str);
3371 * Something went totally wrong, this is not
3372 * an input error, something in this code broke.
3374 die("Unexpected end of arguments\n");
3378 param = param->next;
3381 ret = (*func_handle->func)(s, args);
3385 strings = string->next;
3391 /* TBD : handle return type here */
3395 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
3397 struct pevent *pevent = event->pevent;
3398 struct format_field *field, *ip_field;
3399 struct print_arg *args, *arg, **next;
3400 unsigned long long ip, val;
3404 field = pevent->bprint_buf_field;
3405 ip_field = pevent->bprint_ip_field;
3408 field = pevent_find_field(event, "buf");
3410 die("can't find buffer field for binary printk");
3411 ip_field = pevent_find_field(event, "ip");
3413 die("can't find ip field for binary printk");
3414 pevent->bprint_buf_field = field;
3415 pevent->bprint_ip_field = ip_field;
3418 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
3421 * The first arg is the IP pointer.
3428 arg->type = PRINT_ATOM;
3429 arg->atom.atom = malloc_or_die(32);
3430 sprintf(arg->atom.atom, "%lld", ip);
3432 /* skip the first "%pf : " */
3433 for (ptr = fmt + 6, bptr = data + field->offset;
3434 bptr < data + size && *ptr; ptr++) {
3458 /* the pointers are always 4 bytes aligned */
3459 bptr = (void *)(((unsigned long)bptr + 3) &
3466 ls = pevent->long_size;
3473 val = pevent_read_number(pevent, bptr, ls);
3477 arg->type = PRINT_ATOM;
3478 arg->atom.atom = malloc_or_die(32);
3479 sprintf(arg->atom.atom, "%lld", val);
3486 arg->type = PRINT_BSTRING;
3487 arg->string.string = strdup(bptr);
3488 bptr += strlen(bptr) + 1;
3500 static void free_args(struct print_arg *args)
3502 struct print_arg *next;
3513 get_bprint_format(void *data, int size __unused, struct event_format *event)
3515 struct pevent *pevent = event->pevent;
3516 unsigned long long addr;
3517 struct format_field *field;
3518 struct printk_map *printk;
3522 field = pevent->bprint_fmt_field;
3525 field = pevent_find_field(event, "fmt");
3527 die("can't find format field for binary printk");
3528 pevent->bprint_fmt_field = field;
3531 addr = pevent_read_number(pevent, data + field->offset, field->size);
3533 printk = find_printk(pevent, addr);
3535 format = malloc_or_die(45);
3536 sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
3542 /* Remove any quotes. */
3545 format = malloc_or_die(strlen(p) + 10);
3546 sprintf(format, "%s : %s", "%pf", p);
3547 /* remove ending quotes and new line since we will add one too */
3548 p = format + strlen(format) - 1;
3553 if (strcmp(p, "\\n") == 0)
3559 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
3560 struct event_format *event, struct print_arg *arg)
3563 char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3565 if (arg->type == PRINT_FUNC) {
3566 process_defined_func(s, data, size, event, arg);
3570 if (arg->type != PRINT_FIELD) {
3571 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
3577 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
3578 if (!arg->field.field) {
3580 pevent_find_any_field(event, arg->field.name);
3581 if (!arg->field.field)
3582 die("field %s not found", arg->field.name);
3584 if (arg->field.field->size != 6) {
3585 trace_seq_printf(s, "INVALIDMAC");
3588 buf = data + arg->field.field->offset;
3589 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
3592 static void print_event_fields(struct trace_seq *s, void *data, int size,
3593 struct event_format *event)
3595 struct format_field *field;
3596 unsigned long long val;
3597 unsigned int offset, len, i;
3599 field = event->format.fields;
3601 trace_seq_printf(s, " %s=", field->name);
3602 if (field->flags & FIELD_IS_ARRAY) {
3603 offset = field->offset;
3605 if (field->flags & FIELD_IS_DYNAMIC) {
3606 val = pevent_read_number(event->pevent, data + offset, len);
3611 if (field->flags & FIELD_IS_STRING) {
3612 trace_seq_printf(s, "%s", (char *)data + offset);
3614 trace_seq_puts(s, "ARRAY[");
3615 for (i = 0; i < len; i++) {
3617 trace_seq_puts(s, ", ");
3618 trace_seq_printf(s, "%02x",
3619 *((unsigned char *)data + offset + i));
3621 trace_seq_putc(s, ']');
3624 val = pevent_read_number(event->pevent, data + field->offset,
3626 if (field->flags & FIELD_IS_POINTER) {
3627 trace_seq_printf(s, "0x%llx", val);
3628 } else if (field->flags & FIELD_IS_SIGNED) {
3629 switch (field->size) {
3632 * If field is long then print it in hex.
3633 * A long usually stores pointers.
3635 if (field->flags & FIELD_IS_LONG)
3636 trace_seq_printf(s, "0x%x", (int)val);
3638 trace_seq_printf(s, "%d", (int)val);
3641 trace_seq_printf(s, "%2d", (short)val);
3644 trace_seq_printf(s, "%1d", (char)val);
3647 trace_seq_printf(s, "%lld", val);
3650 if (field->flags & FIELD_IS_LONG)
3651 trace_seq_printf(s, "0x%llx", val);
3653 trace_seq_printf(s, "%llu", val);
3656 field = field->next;
3660 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
3662 struct pevent *pevent = event->pevent;
3663 struct print_fmt *print_fmt = &event->print_fmt;
3664 struct print_arg *arg = print_fmt->args;
3665 struct print_arg *args = NULL;
3666 const char *ptr = print_fmt->format;
3667 unsigned long long val;
3668 struct func_map *func;
3669 const char *saveptr;
3670 char *bprint_fmt = NULL;
3678 if (event->flags & EVENT_FL_FAILED) {
3679 trace_seq_printf(s, "[FAILED TO PARSE]");
3680 print_event_fields(s, data, size, event);
3684 if (event->flags & EVENT_FL_ISBPRINT) {
3685 bprint_fmt = get_bprint_format(data, size, event);
3686 args = make_bprint_args(bprint_fmt, data, size, event);
3691 for (; *ptr; ptr++) {
3697 trace_seq_putc(s, '\n');
3700 trace_seq_putc(s, '\t');
3703 trace_seq_putc(s, '\r');
3706 trace_seq_putc(s, '\\');
3709 trace_seq_putc(s, *ptr);
3713 } else if (*ptr == '%') {
3721 trace_seq_putc(s, '%');
3724 /* FIXME: need to handle properly */
3736 /* The argument is the length. */
3738 die("no argument match");
3739 len_arg = eval_num_arg(data, size, event, arg);
3749 if (pevent->long_size == 4)
3754 if (*(ptr+1) == 'F' ||
3758 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
3759 print_mac_arg(s, *(ptr+1), data, size, event, arg);
3771 die("no argument match");
3773 len = ((unsigned long)ptr + 1) -
3774 (unsigned long)saveptr;
3776 /* should never happen */
3780 memcpy(format, saveptr, len);
3783 val = eval_num_arg(data, size, event, arg);
3787 func = find_func(pevent, val);
3789 trace_seq_puts(s, func->func);
3790 if (show_func == 'F')
3797 if (pevent->long_size == 8 && ls) {
3801 /* make %l into %ll */
3802 p = strchr(format, 'l');
3804 memmove(p, p+1, strlen(p)+1);
3805 else if (strcmp(format, "%p") == 0)
3806 strcpy(format, "0x%llx");
3811 trace_seq_printf(s, format, len_arg, (char)val);
3813 trace_seq_printf(s, format, (char)val);
3817 trace_seq_printf(s, format, len_arg, (short)val);
3819 trace_seq_printf(s, format, (short)val);
3823 trace_seq_printf(s, format, len_arg, (int)val);
3825 trace_seq_printf(s, format, (int)val);
3829 trace_seq_printf(s, format, len_arg, (long)val);
3831 trace_seq_printf(s, format, (long)val);
3835 trace_seq_printf(s, format, len_arg,
3838 trace_seq_printf(s, format, (long long)val);
3841 die("bad count (%d)", ls);
3846 die("no matching argument");
3848 len = ((unsigned long)ptr + 1) -
3849 (unsigned long)saveptr;
3851 /* should never happen */
3855 memcpy(format, saveptr, len);
3859 print_str_arg(s, data, size, event,
3860 format, len_arg, arg);
3864 trace_seq_printf(s, ">%c<", *ptr);
3868 trace_seq_putc(s, *ptr);
3878 * pevent_data_lat_fmt - parse the data for the latency format
3879 * @pevent: a handle to the pevent
3880 * @s: the trace_seq to write to
3881 * @data: the raw data to read from
3882 * @size: currently unused.
3884 * This parses out the Latency format (interrupts disabled,
3885 * need rescheduling, in hard/soft interrupt, preempt count
3886 * and lock depth) and places it into the trace_seq.
3888 void pevent_data_lat_fmt(struct pevent *pevent,
3889 struct trace_seq *s, struct pevent_record *record)
3891 static int check_lock_depth = 1;
3892 static int lock_depth_exists;
3893 unsigned int lat_flags;
3898 void *data = record->data;
3900 lat_flags = parse_common_flags(pevent, data);
3901 pc = parse_common_pc(pevent, data);
3902 /* lock_depth may not always exist */
3903 if (check_lock_depth) {
3904 struct format_field *field;
3905 struct event_format *event;
3907 check_lock_depth = 0;
3908 event = pevent->events[0];
3909 field = pevent_find_common_field(event, "common_lock_depth");
3911 lock_depth_exists = 1;
3913 if (lock_depth_exists)
3914 lock_depth = parse_common_lock_depth(pevent, data);
3916 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
3917 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
3919 trace_seq_printf(s, "%c%c%c",
3920 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
3921 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
3923 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
3925 (hardirq && softirq) ? 'H' :
3926 hardirq ? 'h' : softirq ? 's' : '.');
3929 trace_seq_printf(s, "%x", pc);
3931 trace_seq_putc(s, '.');
3933 if (lock_depth_exists) {
3935 trace_seq_putc(s, '.');
3937 trace_seq_printf(s, "%d", lock_depth);
3940 trace_seq_terminate(s);
3944 * pevent_data_type - parse out the given event type
3945 * @pevent: a handle to the pevent
3946 * @rec: the record to read from
3948 * This returns the event id from the @rec.
3950 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
3952 return trace_parse_common_type(pevent, rec->data);
3956 * pevent_data_event_from_type - find the event by a given type
3957 * @pevent: a handle to the pevent
3958 * @type: the type of the event.
3960 * This returns the event form a given @type;
3962 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
3964 return pevent_find_event(pevent, type);
3968 * pevent_data_pid - parse the PID from raw data
3969 * @pevent: a handle to the pevent
3970 * @rec: the record to parse
3972 * This returns the PID from a raw data.
3974 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
3976 return parse_common_pid(pevent, rec->data);
3980 * pevent_data_comm_from_pid - return the command line from PID
3981 * @pevent: a handle to the pevent
3982 * @pid: the PID of the task to search for
3984 * This returns a pointer to the command line that has the given
3987 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
3991 comm = find_cmdline(pevent, pid);
3996 * pevent_data_comm_from_pid - parse the data into the print format
3997 * @s: the trace_seq to write to
3998 * @event: the handle to the event
3999 * @cpu: the cpu the event was recorded on
4000 * @data: the raw data
4001 * @size: the size of the raw data
4002 * @nsecs: the timestamp of the event
4004 * This parses the raw @data using the given @event information and
4005 * writes the print format into the trace_seq.
4007 void pevent_event_info(struct trace_seq *s, struct event_format *event,
4008 struct pevent_record *record)
4010 int print_pretty = 1;
4012 if (event->pevent->print_raw)
4013 print_event_fields(s, record->data, record->size, event);
4017 print_pretty = event->handler(s, record, event,
4021 pretty_print(s, record->data, record->size, event);
4024 trace_seq_terminate(s);
4027 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
4028 struct pevent_record *record)
4030 static char *spaces = " "; /* 20 spaces */
4031 struct event_format *event;
4033 unsigned long usecs;
4034 unsigned long nsecs;
4036 void *data = record->data;
4042 secs = record->ts / NSECS_PER_SEC;
4043 nsecs = record->ts - secs * NSECS_PER_SEC;
4045 if (record->size < 0) {
4046 do_warning("ug! negative record size %d", record->size);
4050 type = trace_parse_common_type(pevent, data);
4052 event = pevent_find_event(pevent, type);
4054 do_warning("ug! no event found for type %d", type);
4058 pid = parse_common_pid(pevent, data);
4059 comm = find_cmdline(pevent, pid);
4061 if (pevent->latency_format) {
4062 trace_seq_printf(s, "%8.8s-%-5d %3d",
4063 comm, pid, record->cpu);
4064 pevent_data_lat_fmt(pevent, s, record);
4066 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
4068 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
4072 usecs = (nsecs + 500) / NSECS_PER_USEC;
4076 trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
4078 /* Space out the event names evenly. */
4079 len = strlen(event->name);
4081 trace_seq_printf(s, "%.*s", 20 - len, spaces);
4083 pevent_event_info(s, event, record);
4086 static int events_id_cmp(const void *a, const void *b)
4088 struct event_format * const * ea = a;
4089 struct event_format * const * eb = b;
4091 if ((*ea)->id < (*eb)->id)
4094 if ((*ea)->id > (*eb)->id)
4100 static int events_name_cmp(const void *a, const void *b)
4102 struct event_format * const * ea = a;
4103 struct event_format * const * eb = b;
4106 res = strcmp((*ea)->name, (*eb)->name);
4110 res = strcmp((*ea)->system, (*eb)->system);
4114 return events_id_cmp(a, b);
4117 static int events_system_cmp(const void *a, const void *b)
4119 struct event_format * const * ea = a;
4120 struct event_format * const * eb = b;
4123 res = strcmp((*ea)->system, (*eb)->system);
4127 res = strcmp((*ea)->name, (*eb)->name);
4131 return events_id_cmp(a, b);
4134 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
4136 struct event_format **events;
4137 int (*sort)(const void *a, const void *b);
4139 events = pevent->sort_events;
4141 if (events && pevent->last_type == sort_type)
4145 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
4149 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
4150 events[pevent->nr_events] = NULL;
4152 pevent->sort_events = events;
4154 /* the internal events are sorted by id */
4155 if (sort_type == EVENT_SORT_ID) {
4156 pevent->last_type = sort_type;
4161 switch (sort_type) {
4163 sort = events_id_cmp;
4165 case EVENT_SORT_NAME:
4166 sort = events_name_cmp;
4168 case EVENT_SORT_SYSTEM:
4169 sort = events_system_cmp;
4175 qsort(events, pevent->nr_events, sizeof(*events), sort);
4176 pevent->last_type = sort_type;
4181 static struct format_field **
4182 get_event_fields(const char *type, const char *name,
4183 int count, struct format_field *list)
4185 struct format_field **fields;
4186 struct format_field *field;
4189 fields = malloc_or_die(sizeof(*fields) * (count + 1));
4190 for (field = list; field; field = field->next) {
4191 fields[i++] = field;
4192 if (i == count + 1) {
4193 do_warning("event %s has more %s fields than specified",
4201 do_warning("event %s has less %s fields than specified",
4210 * pevent_event_common_fields - return a list of common fields for an event
4211 * @event: the event to return the common fields of.
4213 * Returns an allocated array of fields. The last item in the array is NULL.
4214 * The array must be freed with free().
4216 struct format_field **pevent_event_common_fields(struct event_format *event)
4218 return get_event_fields("common", event->name,
4219 event->format.nr_common,
4220 event->format.common_fields);
4224 * pevent_event_fields - return a list of event specific fields for an event
4225 * @event: the event to return the fields of.
4227 * Returns an allocated array of fields. The last item in the array is NULL.
4228 * The array must be freed with free().
4230 struct format_field **pevent_event_fields(struct event_format *event)
4232 return get_event_fields("event", event->name,
4233 event->format.nr_fields,
4234 event->format.fields);
4237 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
4239 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
4241 trace_seq_puts(s, ", ");
4242 print_fields(s, field->next);
4247 static void print_args(struct print_arg *args)
4249 int print_paren = 1;
4252 switch (args->type) {
4257 printf("%s", args->atom.atom);
4260 printf("REC->%s", args->field.name);
4263 printf("__print_flags(");
4264 print_args(args->flags.field);
4265 printf(", %s, ", args->flags.delim);
4267 print_fields(&s, args->flags.flags);
4268 trace_seq_do_printf(&s);
4269 trace_seq_destroy(&s);
4273 printf("__print_symbolic(");
4274 print_args(args->symbol.field);
4277 print_fields(&s, args->symbol.symbols);
4278 trace_seq_do_printf(&s);
4279 trace_seq_destroy(&s);
4284 printf("__get_str(%s)", args->string.string);
4287 printf("(%s)", args->typecast.type);
4288 print_args(args->typecast.item);
4291 if (strcmp(args->op.op, ":") == 0)
4295 print_args(args->op.left);
4296 printf(" %s ", args->op.op);
4297 print_args(args->op.right);
4302 /* we should warn... */
4307 print_args(args->next);
4311 static void parse_header_field(const char *field,
4312 int *offset, int *size, int mandatory)
4314 unsigned long long save_input_buf_ptr;
4315 unsigned long long save_input_buf_siz;
4319 save_input_buf_ptr = input_buf_ptr;
4320 save_input_buf_siz = input_buf_siz;
4322 if (read_expected(EVENT_ITEM, "field") < 0)
4324 if (read_expected(EVENT_OP, ":") < 0)
4328 if (read_expect_type(EVENT_ITEM, &token) < 0)
4333 * If this is not a mandatory field, then test it first.
4336 if (read_expected(EVENT_ITEM, field) < 0)
4339 if (read_expect_type(EVENT_ITEM, &token) < 0)
4341 if (strcmp(token, field) != 0)
4346 if (read_expected(EVENT_OP, ";") < 0)
4348 if (read_expected(EVENT_ITEM, "offset") < 0)
4350 if (read_expected(EVENT_OP, ":") < 0)
4352 if (read_expect_type(EVENT_ITEM, &token) < 0)
4354 *offset = atoi(token);
4356 if (read_expected(EVENT_OP, ";") < 0)
4358 if (read_expected(EVENT_ITEM, "size") < 0)
4360 if (read_expected(EVENT_OP, ":") < 0)
4362 if (read_expect_type(EVENT_ITEM, &token) < 0)
4364 *size = atoi(token);
4366 if (read_expected(EVENT_OP, ";") < 0)
4368 type = read_token(&token);
4369 if (type != EVENT_NEWLINE) {
4370 /* newer versions of the kernel have a "signed" type */
4371 if (type != EVENT_ITEM)
4374 if (strcmp(token, "signed") != 0)
4379 if (read_expected(EVENT_OP, ":") < 0)
4382 if (read_expect_type(EVENT_ITEM, &token))
4386 if (read_expected(EVENT_OP, ";") < 0)
4389 if (read_expect_type(EVENT_NEWLINE, &token))
4397 input_buf_ptr = save_input_buf_ptr;
4398 input_buf_siz = save_input_buf_siz;
4405 * pevent_parse_header_page - parse the data stored in the header page
4406 * @pevent: the handle to the pevent
4407 * @buf: the buffer storing the header page format string
4408 * @size: the size of @buf
4409 * @long_size: the long size to use if there is no header
4411 * This parses the header page format for information on the
4412 * ring buffer used. The @buf should be copied from
4414 * /sys/kernel/debug/tracing/events/header_page
4416 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
4423 * Old kernels did not have header page info.
4424 * Sorry but we just use what we find here in user space.
4426 pevent->header_page_ts_size = sizeof(long long);
4427 pevent->header_page_size_size = long_size;
4428 pevent->header_page_data_offset = sizeof(long long) + long_size;
4429 pevent->old_format = 1;
4432 init_input_buf(buf, size);
4434 parse_header_field("timestamp", &pevent->header_page_ts_offset,
4435 &pevent->header_page_ts_size, 1);
4436 parse_header_field("commit", &pevent->header_page_size_offset,
4437 &pevent->header_page_size_size, 1);
4438 parse_header_field("overwrite", &pevent->header_page_overwrite,
4440 parse_header_field("data", &pevent->header_page_data_offset,
4441 &pevent->header_page_data_size, 1);
4446 static int event_matches(struct event_format *event,
4447 int id, const char *sys_name,
4448 const char *event_name)
4450 if (id >= 0 && id != event->id)
4453 if (event_name && (strcmp(event_name, event->name) != 0))
4456 if (sys_name && (strcmp(sys_name, event->system) != 0))
4462 static void free_handler(struct event_handler *handle)
4464 free((void *)handle->sys_name);
4465 free((void *)handle->event_name);
4469 static int find_event_handle(struct pevent *pevent, struct event_format *event)
4471 struct event_handler *handle, **next;
4473 for (next = &pevent->handlers; *next;
4474 next = &(*next)->next) {
4476 if (event_matches(event, handle->id,
4478 handle->event_name))
4485 pr_stat("overriding event (%d) %s:%s with new print handler",
4486 event->id, event->system, event->name);
4488 event->handler = handle->func;
4489 event->context = handle->context;
4491 *next = handle->next;
4492 free_handler(handle);
4498 * pevent_parse_event - parse the event format
4499 * @pevent: the handle to the pevent
4500 * @buf: the buffer storing the event format string
4501 * @size: the size of @buf
4502 * @sys: the system the event belongs to
4504 * This parses the event format and creates an event structure
4505 * to quickly parse raw data for a given event.
4507 * These files currently come from:
4509 * /sys/kernel/debug/tracing/events/.../.../format
4511 int pevent_parse_event(struct pevent *pevent,
4512 const char *buf, unsigned long size,
4515 struct event_format *event;
4518 init_input_buf(buf, size);
4520 event = alloc_event();
4524 event->name = event_read_name();
4531 if (strcmp(sys, "ftrace") == 0) {
4533 event->flags |= EVENT_FL_ISFTRACE;
4535 if (strcmp(event->name, "bprint") == 0)
4536 event->flags |= EVENT_FL_ISBPRINT;
4539 event->id = event_read_id();
4541 die("failed to read event id");
4543 event->system = strdup(sys);
4545 /* Add pevent to event so that it can be referenced */
4546 event->pevent = pevent;
4548 ret = event_read_format(event);
4550 do_warning("failed to read event format for %s", event->name);
4555 * If the event has an override, don't print warnings if the event
4556 * print format fails to parse.
4558 if (find_event_handle(pevent, event))
4561 ret = event_read_print(event);
4563 do_warning("failed to read event print fmt for %s",
4570 add_event(pevent, event);
4572 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
4573 struct format_field *field;
4574 struct print_arg *arg, **list;
4576 /* old ftrace had no args */
4578 list = &event->print_fmt.args;
4579 for (field = event->format.fields; field; field = field->next) {
4583 arg->type = PRINT_FIELD;
4584 arg->field.name = strdup(field->name);
4585 arg->field.field = field;
4590 #define PRINT_ARGS 0
4591 if (PRINT_ARGS && event->print_fmt.args)
4592 print_args(event->print_fmt.args);
4597 event->flags |= EVENT_FL_FAILED;
4598 /* still add it even if it failed */
4599 add_event(pevent, event);
4603 int get_field_val(struct trace_seq *s, struct format_field *field,
4604 const char *name, struct pevent_record *record,
4605 unsigned long long *val, int err)
4609 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4613 if (pevent_read_number_field(field, record->data, val)) {
4615 trace_seq_printf(s, " %s=INVALID", name);
4623 * pevent_get_field_raw - return the raw pointer into the data field
4624 * @s: The seq to print to on error
4625 * @event: the event that the field is for
4626 * @name: The name of the field
4627 * @record: The record with the field name.
4628 * @len: place to store the field length.
4629 * @err: print default error if failed.
4631 * Returns a pointer into record->data of the field and places
4632 * the length of the field in @len.
4634 * On failure, it returns NULL.
4636 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
4637 const char *name, struct pevent_record *record,
4640 struct format_field *field;
4641 void *data = record->data;
4648 field = pevent_find_field(event, name);
4652 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4656 /* Allow @len to be NULL */
4660 offset = field->offset;
4661 if (field->flags & FIELD_IS_DYNAMIC) {
4662 offset = pevent_read_number(event->pevent,
4663 data + offset, field->size);
4664 *len = offset >> 16;
4669 return data + offset;
4673 * pevent_get_field_val - find a field and return its value
4674 * @s: The seq to print to on error
4675 * @event: the event that the field is for
4676 * @name: The name of the field
4677 * @record: The record with the field name.
4678 * @val: place to store the value of the field.
4679 * @err: print default error if failed.
4681 * Returns 0 on success -1 on field not found.
4683 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
4684 const char *name, struct pevent_record *record,
4685 unsigned long long *val, int err)
4687 struct format_field *field;
4692 field = pevent_find_field(event, name);
4694 return get_field_val(s, field, name, record, val, err);
4698 * pevent_get_common_field_val - find a common field and return its value
4699 * @s: The seq to print to on error
4700 * @event: the event that the field is for
4701 * @name: The name of the field
4702 * @record: The record with the field name.
4703 * @val: place to store the value of the field.
4704 * @err: print default error if failed.
4706 * Returns 0 on success -1 on field not found.
4708 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
4709 const char *name, struct pevent_record *record,
4710 unsigned long long *val, int err)
4712 struct format_field *field;
4717 field = pevent_find_common_field(event, name);
4719 return get_field_val(s, field, name, record, val, err);
4723 * pevent_get_any_field_val - find a any field and return its value
4724 * @s: The seq to print to on error
4725 * @event: the event that the field is for
4726 * @name: The name of the field
4727 * @record: The record with the field name.
4728 * @val: place to store the value of the field.
4729 * @err: print default error if failed.
4731 * Returns 0 on success -1 on field not found.
4733 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
4734 const char *name, struct pevent_record *record,
4735 unsigned long long *val, int err)
4737 struct format_field *field;
4742 field = pevent_find_any_field(event, name);
4744 return get_field_val(s, field, name, record, val, err);
4748 * pevent_print_num_field - print a field and a format
4749 * @s: The seq to print to
4750 * @fmt: The printf format to print the field with.
4751 * @event: the event that the field is for
4752 * @name: The name of the field
4753 * @record: The record with the field name.
4754 * @err: print default error if failed.
4756 * Returns: 0 on success, -1 field not fould, or 1 if buffer is full.
4758 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
4759 struct event_format *event, const char *name,
4760 struct pevent_record *record, int err)
4762 struct format_field *field = pevent_find_field(event, name);
4763 unsigned long long val;
4768 if (pevent_read_number_field(field, record->data, &val))
4771 return trace_seq_printf(s, fmt, val);
4775 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
4779 static void free_func_handle(struct pevent_function_handler *func)
4781 struct pevent_func_params *params;
4785 while (func->params) {
4786 params = func->params;
4787 func->params = params->next;
4795 * pevent_register_print_function - register a helper function
4796 * @pevent: the handle to the pevent
4797 * @func: the function to process the helper function
4798 * @name: the name of the helper function
4799 * @parameters: A list of enum pevent_func_arg_type
4801 * Some events may have helper functions in the print format arguments.
4802 * This allows a plugin to dynmically create a way to process one
4803 * of these functions.
4805 * The @parameters is a variable list of pevent_func_arg_type enums that
4806 * must end with PEVENT_FUNC_ARG_VOID.
4808 int pevent_register_print_function(struct pevent *pevent,
4809 pevent_func_handler func,
4810 enum pevent_func_arg_type ret_type,
4813 struct pevent_function_handler *func_handle;
4814 struct pevent_func_params **next_param;
4815 struct pevent_func_params *param;
4816 enum pevent_func_arg_type type;
4819 func_handle = find_func_handler(pevent, name);
4822 * This is most like caused by the users own
4823 * plugins updating the function. This overrides the
4826 pr_stat("override of function helper '%s'", name);
4827 remove_func_handler(pevent, name);
4830 func_handle = malloc_or_die(sizeof(*func_handle));
4831 memset(func_handle, 0, sizeof(*func_handle));
4833 func_handle->ret_type = ret_type;
4834 func_handle->name = strdup(name);
4835 func_handle->func = func;
4836 if (!func_handle->name)
4837 die("Failed to allocate function name");
4839 next_param = &(func_handle->params);
4842 type = va_arg(ap, enum pevent_func_arg_type);
4843 if (type == PEVENT_FUNC_ARG_VOID)
4846 if (type < 0 || type >= PEVENT_FUNC_ARG_MAX_TYPES) {
4847 warning("Invalid argument type %d", type);
4851 param = malloc_or_die(sizeof(*param));
4855 *next_param = param;
4856 next_param = &(param->next);
4858 func_handle->nr_args++;
4862 func_handle->next = pevent->func_handlers;
4863 pevent->func_handlers = func_handle;
4868 free_func_handle(func_handle);
4873 * pevent_register_event_handle - register a way to parse an event
4874 * @pevent: the handle to the pevent
4875 * @id: the id of the event to register
4876 * @sys_name: the system name the event belongs to
4877 * @event_name: the name of the event
4878 * @func: the function to call to parse the event information
4880 * This function allows a developer to override the parsing of
4881 * a given event. If for some reason the default print format
4882 * is not sufficient, this function will register a function
4883 * for an event to be used to parse the data instead.
4885 * If @id is >= 0, then it is used to find the event.
4886 * else @sys_name and @event_name are used.
4888 int pevent_register_event_handler(struct pevent *pevent,
4889 int id, char *sys_name, char *event_name,
4890 pevent_event_handler_func func,
4893 struct event_format *event;
4894 struct event_handler *handle;
4898 event = pevent_find_event(pevent, id);
4901 if (event_name && (strcmp(event_name, event->name) != 0))
4903 if (sys_name && (strcmp(sys_name, event->system) != 0))
4906 event = pevent_find_event_by_name(pevent, sys_name, event_name);
4911 pr_stat("overriding event (%d) %s:%s with new print handler",
4912 event->id, event->system, event->name);
4914 event->handler = func;
4915 event->context = context;
4919 /* Save for later use. */
4920 handle = malloc_or_die(sizeof(*handle));
4921 memset(handle, 0, sizeof(*handle));
4924 handle->event_name = strdup(event_name);
4926 handle->sys_name = strdup(sys_name);
4928 handle->func = func;
4929 handle->next = pevent->handlers;
4930 pevent->handlers = handle;
4931 handle->context = context;
4937 * pevent_alloc - create a pevent handle
4939 struct pevent *pevent_alloc(void)
4941 struct pevent *pevent;
4943 pevent = malloc(sizeof(*pevent));
4946 memset(pevent, 0, sizeof(*pevent));
4947 pevent->ref_count = 1;
4952 void pevent_ref(struct pevent *pevent)
4954 pevent->ref_count++;
4957 static void free_format_fields(struct format_field *field)
4959 struct format_field *next;
4970 static void free_formats(struct format *format)
4972 free_format_fields(format->common_fields);
4973 free_format_fields(format->fields);
4976 static void free_event(struct event_format *event)
4979 free(event->system);
4981 free_formats(&event->format);
4983 free(event->print_fmt.format);
4984 free_args(event->print_fmt.args);
4990 * pevent_free - free a pevent handle
4991 * @pevent: the pevent handle to free
4993 void pevent_free(struct pevent *pevent)
4995 struct cmdline_list *cmdlist, *cmdnext;
4996 struct func_list *funclist, *funcnext;
4997 struct printk_list *printklist, *printknext;
4998 struct pevent_function_handler *func_handler;
4999 struct event_handler *handle;
5005 cmdlist = pevent->cmdlist;
5006 funclist = pevent->funclist;
5007 printklist = pevent->printklist;
5009 pevent->ref_count--;
5010 if (pevent->ref_count)
5013 if (pevent->cmdlines) {
5014 for (i = 0; i < pevent->cmdline_count; i++)
5015 free(pevent->cmdlines[i].comm);
5016 free(pevent->cmdlines);
5020 cmdnext = cmdlist->next;
5021 free(cmdlist->comm);
5026 if (pevent->func_map) {
5027 for (i = 0; i < pevent->func_count; i++) {
5028 free(pevent->func_map[i].func);
5029 free(pevent->func_map[i].mod);
5031 free(pevent->func_map);
5035 funcnext = funclist->next;
5036 free(funclist->func);
5037 free(funclist->mod);
5039 funclist = funcnext;
5042 while (pevent->func_handlers) {
5043 func_handler = pevent->func_handlers;
5044 pevent->func_handlers = func_handler->next;
5045 free_func_handle(func_handler);
5048 if (pevent->printk_map) {
5049 for (i = 0; i < pevent->printk_count; i++)
5050 free(pevent->printk_map[i].printk);
5051 free(pevent->printk_map);
5054 while (printklist) {
5055 printknext = printklist->next;
5056 free(printklist->printk);
5058 printklist = printknext;
5061 for (i = 0; i < pevent->nr_events; i++)
5062 free_event(pevent->events[i]);
5064 while (pevent->handlers) {
5065 handle = pevent->handlers;
5066 pevent->handlers = handle->next;
5067 free_handler(handle);
5070 free(pevent->events);
5071 free(pevent->sort_events);
5076 void pevent_unref(struct pevent *pevent)
5078 pevent_free(pevent);