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");
3380 ret = (*func_handle->func)(s, args);
3384 strings = string->next;
3390 /* TBD : handle return type here */
3394 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
3396 struct pevent *pevent = event->pevent;
3397 struct format_field *field, *ip_field;
3398 struct print_arg *args, *arg, **next;
3399 unsigned long long ip, val;
3403 field = pevent->bprint_buf_field;
3404 ip_field = pevent->bprint_ip_field;
3407 field = pevent_find_field(event, "buf");
3409 die("can't find buffer field for binary printk");
3410 ip_field = pevent_find_field(event, "ip");
3412 die("can't find ip field for binary printk");
3413 pevent->bprint_buf_field = field;
3414 pevent->bprint_ip_field = ip_field;
3417 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
3420 * The first arg is the IP pointer.
3427 arg->type = PRINT_ATOM;
3428 arg->atom.atom = malloc_or_die(32);
3429 sprintf(arg->atom.atom, "%lld", ip);
3431 /* skip the first "%pf : " */
3432 for (ptr = fmt + 6, bptr = data + field->offset;
3433 bptr < data + size && *ptr; ptr++) {
3457 /* the pointers are always 4 bytes aligned */
3458 bptr = (void *)(((unsigned long)bptr + 3) &
3465 ls = pevent->long_size;
3472 val = pevent_read_number(pevent, bptr, ls);
3476 arg->type = PRINT_ATOM;
3477 arg->atom.atom = malloc_or_die(32);
3478 sprintf(arg->atom.atom, "%lld", val);
3485 arg->type = PRINT_BSTRING;
3486 arg->string.string = strdup(bptr);
3487 bptr += strlen(bptr) + 1;
3499 static void free_args(struct print_arg *args)
3501 struct print_arg *next;
3512 get_bprint_format(void *data, int size __unused, struct event_format *event)
3514 struct pevent *pevent = event->pevent;
3515 unsigned long long addr;
3516 struct format_field *field;
3517 struct printk_map *printk;
3521 field = pevent->bprint_fmt_field;
3524 field = pevent_find_field(event, "fmt");
3526 die("can't find format field for binary printk");
3527 pevent->bprint_fmt_field = field;
3530 addr = pevent_read_number(pevent, data + field->offset, field->size);
3532 printk = find_printk(pevent, addr);
3534 format = malloc_or_die(45);
3535 sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
3541 /* Remove any quotes. */
3544 format = malloc_or_die(strlen(p) + 10);
3545 sprintf(format, "%s : %s", "%pf", p);
3546 /* remove ending quotes and new line since we will add one too */
3547 p = format + strlen(format) - 1;
3552 if (strcmp(p, "\\n") == 0)
3558 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
3559 struct event_format *event, struct print_arg *arg)
3562 char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3564 if (arg->type == PRINT_FUNC) {
3565 process_defined_func(s, data, size, event, arg);
3569 if (arg->type != PRINT_FIELD) {
3570 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
3576 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
3577 if (!arg->field.field) {
3579 pevent_find_any_field(event, arg->field.name);
3580 if (!arg->field.field)
3581 die("field %s not found", arg->field.name);
3583 if (arg->field.field->size != 6) {
3584 trace_seq_printf(s, "INVALIDMAC");
3587 buf = data + arg->field.field->offset;
3588 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
3591 static void print_event_fields(struct trace_seq *s, void *data, int size,
3592 struct event_format *event)
3594 struct format_field *field;
3595 unsigned long long val;
3596 unsigned int offset, len, i;
3598 field = event->format.fields;
3600 trace_seq_printf(s, " %s=", field->name);
3601 if (field->flags & FIELD_IS_ARRAY) {
3602 offset = field->offset;
3604 if (field->flags & FIELD_IS_DYNAMIC) {
3605 val = pevent_read_number(event->pevent, data + offset, len);
3610 if (field->flags & FIELD_IS_STRING) {
3611 trace_seq_printf(s, "%s", (char *)data + offset);
3613 trace_seq_puts(s, "ARRAY[");
3614 for (i = 0; i < len; i++) {
3616 trace_seq_puts(s, ", ");
3617 trace_seq_printf(s, "%02x",
3618 *((unsigned char *)data + offset + i));
3620 trace_seq_putc(s, ']');
3623 val = pevent_read_number(event->pevent, data + field->offset,
3625 if (field->flags & FIELD_IS_POINTER) {
3626 trace_seq_printf(s, "0x%llx", val);
3627 } else if (field->flags & FIELD_IS_SIGNED) {
3628 switch (field->size) {
3631 * If field is long then print it in hex.
3632 * A long usually stores pointers.
3634 if (field->flags & FIELD_IS_LONG)
3635 trace_seq_printf(s, "0x%x", (int)val);
3637 trace_seq_printf(s, "%d", (int)val);
3640 trace_seq_printf(s, "%2d", (short)val);
3643 trace_seq_printf(s, "%1d", (char)val);
3646 trace_seq_printf(s, "%lld", val);
3649 if (field->flags & FIELD_IS_LONG)
3650 trace_seq_printf(s, "0x%llx", val);
3652 trace_seq_printf(s, "%llu", val);
3655 field = field->next;
3659 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
3661 struct pevent *pevent = event->pevent;
3662 struct print_fmt *print_fmt = &event->print_fmt;
3663 struct print_arg *arg = print_fmt->args;
3664 struct print_arg *args = NULL;
3665 const char *ptr = print_fmt->format;
3666 unsigned long long val;
3667 struct func_map *func;
3668 const char *saveptr;
3669 char *bprint_fmt = NULL;
3677 if (event->flags & EVENT_FL_FAILED) {
3678 trace_seq_printf(s, "[FAILED TO PARSE]");
3679 print_event_fields(s, data, size, event);
3683 if (event->flags & EVENT_FL_ISBPRINT) {
3684 bprint_fmt = get_bprint_format(data, size, event);
3685 args = make_bprint_args(bprint_fmt, data, size, event);
3690 for (; *ptr; ptr++) {
3696 trace_seq_putc(s, '\n');
3699 trace_seq_putc(s, '\t');
3702 trace_seq_putc(s, '\r');
3705 trace_seq_putc(s, '\\');
3708 trace_seq_putc(s, *ptr);
3712 } else if (*ptr == '%') {
3720 trace_seq_putc(s, '%');
3723 /* FIXME: need to handle properly */
3735 /* The argument is the length. */
3737 die("no argument match");
3738 len_arg = eval_num_arg(data, size, event, arg);
3748 if (pevent->long_size == 4)
3753 if (*(ptr+1) == 'F' ||
3757 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
3758 print_mac_arg(s, *(ptr+1), data, size, event, arg);
3770 die("no argument match");
3772 len = ((unsigned long)ptr + 1) -
3773 (unsigned long)saveptr;
3775 /* should never happen */
3779 memcpy(format, saveptr, len);
3782 val = eval_num_arg(data, size, event, arg);
3786 func = find_func(pevent, val);
3788 trace_seq_puts(s, func->func);
3789 if (show_func == 'F')
3796 if (pevent->long_size == 8 && ls) {
3800 /* make %l into %ll */
3801 p = strchr(format, 'l');
3803 memmove(p, p+1, strlen(p)+1);
3804 else if (strcmp(format, "%p") == 0)
3805 strcpy(format, "0x%llx");
3810 trace_seq_printf(s, format, len_arg, (char)val);
3812 trace_seq_printf(s, format, (char)val);
3816 trace_seq_printf(s, format, len_arg, (short)val);
3818 trace_seq_printf(s, format, (short)val);
3822 trace_seq_printf(s, format, len_arg, (int)val);
3824 trace_seq_printf(s, format, (int)val);
3828 trace_seq_printf(s, format, len_arg, (long)val);
3830 trace_seq_printf(s, format, (long)val);
3834 trace_seq_printf(s, format, len_arg,
3837 trace_seq_printf(s, format, (long long)val);
3840 die("bad count (%d)", ls);
3845 die("no matching argument");
3847 len = ((unsigned long)ptr + 1) -
3848 (unsigned long)saveptr;
3850 /* should never happen */
3854 memcpy(format, saveptr, len);
3858 print_str_arg(s, data, size, event,
3859 format, len_arg, arg);
3863 trace_seq_printf(s, ">%c<", *ptr);
3867 trace_seq_putc(s, *ptr);
3877 * pevent_data_lat_fmt - parse the data for the latency format
3878 * @pevent: a handle to the pevent
3879 * @s: the trace_seq to write to
3880 * @data: the raw data to read from
3881 * @size: currently unused.
3883 * This parses out the Latency format (interrupts disabled,
3884 * need rescheduling, in hard/soft interrupt, preempt count
3885 * and lock depth) and places it into the trace_seq.
3887 void pevent_data_lat_fmt(struct pevent *pevent,
3888 struct trace_seq *s, struct pevent_record *record)
3890 static int check_lock_depth = 1;
3891 static int lock_depth_exists;
3892 unsigned int lat_flags;
3897 void *data = record->data;
3899 lat_flags = parse_common_flags(pevent, data);
3900 pc = parse_common_pc(pevent, data);
3901 /* lock_depth may not always exist */
3902 if (check_lock_depth) {
3903 struct format_field *field;
3904 struct event_format *event;
3906 check_lock_depth = 0;
3907 event = pevent->events[0];
3908 field = pevent_find_common_field(event, "common_lock_depth");
3910 lock_depth_exists = 1;
3912 if (lock_depth_exists)
3913 lock_depth = parse_common_lock_depth(pevent, data);
3915 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
3916 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
3918 trace_seq_printf(s, "%c%c%c",
3919 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
3920 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
3922 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
3924 (hardirq && softirq) ? 'H' :
3925 hardirq ? 'h' : softirq ? 's' : '.');
3928 trace_seq_printf(s, "%x", pc);
3930 trace_seq_putc(s, '.');
3932 if (lock_depth_exists) {
3934 trace_seq_putc(s, '.');
3936 trace_seq_printf(s, "%d", lock_depth);
3939 trace_seq_terminate(s);
3943 * pevent_data_type - parse out the given event type
3944 * @pevent: a handle to the pevent
3945 * @rec: the record to read from
3947 * This returns the event id from the @rec.
3949 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
3951 return trace_parse_common_type(pevent, rec->data);
3955 * pevent_data_event_from_type - find the event by a given type
3956 * @pevent: a handle to the pevent
3957 * @type: the type of the event.
3959 * This returns the event form a given @type;
3961 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
3963 return pevent_find_event(pevent, type);
3967 * pevent_data_pid - parse the PID from raw data
3968 * @pevent: a handle to the pevent
3969 * @rec: the record to parse
3971 * This returns the PID from a raw data.
3973 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
3975 return parse_common_pid(pevent, rec->data);
3979 * pevent_data_comm_from_pid - return the command line from PID
3980 * @pevent: a handle to the pevent
3981 * @pid: the PID of the task to search for
3983 * This returns a pointer to the command line that has the given
3986 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
3990 comm = find_cmdline(pevent, pid);
3995 * pevent_data_comm_from_pid - parse the data into the print format
3996 * @s: the trace_seq to write to
3997 * @event: the handle to the event
3998 * @cpu: the cpu the event was recorded on
3999 * @data: the raw data
4000 * @size: the size of the raw data
4001 * @nsecs: the timestamp of the event
4003 * This parses the raw @data using the given @event information and
4004 * writes the print format into the trace_seq.
4006 void pevent_event_info(struct trace_seq *s, struct event_format *event,
4007 struct pevent_record *record)
4009 int print_pretty = 1;
4011 if (event->pevent->print_raw)
4012 print_event_fields(s, record->data, record->size, event);
4016 print_pretty = event->handler(s, record, event,
4020 pretty_print(s, record->data, record->size, event);
4023 trace_seq_terminate(s);
4026 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
4027 struct pevent_record *record)
4029 static char *spaces = " "; /* 20 spaces */
4030 struct event_format *event;
4032 unsigned long usecs;
4033 unsigned long nsecs;
4035 void *data = record->data;
4041 secs = record->ts / NSECS_PER_SEC;
4042 nsecs = record->ts - secs * NSECS_PER_SEC;
4044 if (record->size < 0) {
4045 do_warning("ug! negative record size %d", record->size);
4049 type = trace_parse_common_type(pevent, data);
4051 event = pevent_find_event(pevent, type);
4053 do_warning("ug! no event found for type %d", type);
4057 pid = parse_common_pid(pevent, data);
4058 comm = find_cmdline(pevent, pid);
4060 if (pevent->latency_format) {
4061 trace_seq_printf(s, "%8.8s-%-5d %3d",
4062 comm, pid, record->cpu);
4063 pevent_data_lat_fmt(pevent, s, record);
4065 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
4067 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
4071 usecs = (nsecs + 500) / NSECS_PER_USEC;
4075 trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
4077 /* Space out the event names evenly. */
4078 len = strlen(event->name);
4080 trace_seq_printf(s, "%.*s", 20 - len, spaces);
4082 pevent_event_info(s, event, record);
4085 static int events_id_cmp(const void *a, const void *b)
4087 struct event_format * const * ea = a;
4088 struct event_format * const * eb = b;
4090 if ((*ea)->id < (*eb)->id)
4093 if ((*ea)->id > (*eb)->id)
4099 static int events_name_cmp(const void *a, const void *b)
4101 struct event_format * const * ea = a;
4102 struct event_format * const * eb = b;
4105 res = strcmp((*ea)->name, (*eb)->name);
4109 res = strcmp((*ea)->system, (*eb)->system);
4113 return events_id_cmp(a, b);
4116 static int events_system_cmp(const void *a, const void *b)
4118 struct event_format * const * ea = a;
4119 struct event_format * const * eb = b;
4122 res = strcmp((*ea)->system, (*eb)->system);
4126 res = strcmp((*ea)->name, (*eb)->name);
4130 return events_id_cmp(a, b);
4133 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
4135 struct event_format **events;
4136 int (*sort)(const void *a, const void *b);
4138 events = pevent->sort_events;
4140 if (events && pevent->last_type == sort_type)
4144 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
4148 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
4149 events[pevent->nr_events] = NULL;
4151 pevent->sort_events = events;
4153 /* the internal events are sorted by id */
4154 if (sort_type == EVENT_SORT_ID) {
4155 pevent->last_type = sort_type;
4160 switch (sort_type) {
4162 sort = events_id_cmp;
4164 case EVENT_SORT_NAME:
4165 sort = events_name_cmp;
4167 case EVENT_SORT_SYSTEM:
4168 sort = events_system_cmp;
4174 qsort(events, pevent->nr_events, sizeof(*events), sort);
4175 pevent->last_type = sort_type;
4180 static struct format_field **
4181 get_event_fields(const char *type, const char *name,
4182 int count, struct format_field *list)
4184 struct format_field **fields;
4185 struct format_field *field;
4188 fields = malloc_or_die(sizeof(*fields) * (count + 1));
4189 for (field = list; field; field = field->next) {
4190 fields[i++] = field;
4191 if (i == count + 1) {
4192 do_warning("event %s has more %s fields than specified",
4200 do_warning("event %s has less %s fields than specified",
4209 * pevent_event_common_fields - return a list of common fields for an event
4210 * @event: the event to return the common fields of.
4212 * Returns an allocated array of fields. The last item in the array is NULL.
4213 * The array must be freed with free().
4215 struct format_field **pevent_event_common_fields(struct event_format *event)
4217 return get_event_fields("common", event->name,
4218 event->format.nr_common,
4219 event->format.common_fields);
4223 * pevent_event_fields - return a list of event specific fields for an event
4224 * @event: the event to return the fields of.
4226 * Returns an allocated array of fields. The last item in the array is NULL.
4227 * The array must be freed with free().
4229 struct format_field **pevent_event_fields(struct event_format *event)
4231 return get_event_fields("event", event->name,
4232 event->format.nr_fields,
4233 event->format.fields);
4236 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
4238 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
4240 trace_seq_puts(s, ", ");
4241 print_fields(s, field->next);
4246 static void print_args(struct print_arg *args)
4248 int print_paren = 1;
4251 switch (args->type) {
4256 printf("%s", args->atom.atom);
4259 printf("REC->%s", args->field.name);
4262 printf("__print_flags(");
4263 print_args(args->flags.field);
4264 printf(", %s, ", args->flags.delim);
4266 print_fields(&s, args->flags.flags);
4267 trace_seq_do_printf(&s);
4268 trace_seq_destroy(&s);
4272 printf("__print_symbolic(");
4273 print_args(args->symbol.field);
4276 print_fields(&s, args->symbol.symbols);
4277 trace_seq_do_printf(&s);
4278 trace_seq_destroy(&s);
4283 printf("__get_str(%s)", args->string.string);
4286 printf("(%s)", args->typecast.type);
4287 print_args(args->typecast.item);
4290 if (strcmp(args->op.op, ":") == 0)
4294 print_args(args->op.left);
4295 printf(" %s ", args->op.op);
4296 print_args(args->op.right);
4301 /* we should warn... */
4306 print_args(args->next);
4310 static void parse_header_field(const char *field,
4311 int *offset, int *size, int mandatory)
4313 unsigned long long save_input_buf_ptr;
4314 unsigned long long save_input_buf_siz;
4318 save_input_buf_ptr = input_buf_ptr;
4319 save_input_buf_siz = input_buf_siz;
4321 if (read_expected(EVENT_ITEM, "field") < 0)
4323 if (read_expected(EVENT_OP, ":") < 0)
4327 if (read_expect_type(EVENT_ITEM, &token) < 0)
4332 * If this is not a mandatory field, then test it first.
4335 if (read_expected(EVENT_ITEM, field) < 0)
4338 if (read_expect_type(EVENT_ITEM, &token) < 0)
4340 if (strcmp(token, field) != 0)
4345 if (read_expected(EVENT_OP, ";") < 0)
4347 if (read_expected(EVENT_ITEM, "offset") < 0)
4349 if (read_expected(EVENT_OP, ":") < 0)
4351 if (read_expect_type(EVENT_ITEM, &token) < 0)
4353 *offset = atoi(token);
4355 if (read_expected(EVENT_OP, ";") < 0)
4357 if (read_expected(EVENT_ITEM, "size") < 0)
4359 if (read_expected(EVENT_OP, ":") < 0)
4361 if (read_expect_type(EVENT_ITEM, &token) < 0)
4363 *size = atoi(token);
4365 if (read_expected(EVENT_OP, ";") < 0)
4367 type = read_token(&token);
4368 if (type != EVENT_NEWLINE) {
4369 /* newer versions of the kernel have a "signed" type */
4370 if (type != EVENT_ITEM)
4373 if (strcmp(token, "signed") != 0)
4378 if (read_expected(EVENT_OP, ":") < 0)
4381 if (read_expect_type(EVENT_ITEM, &token))
4385 if (read_expected(EVENT_OP, ";") < 0)
4388 if (read_expect_type(EVENT_NEWLINE, &token))
4396 input_buf_ptr = save_input_buf_ptr;
4397 input_buf_siz = save_input_buf_siz;
4404 * pevent_parse_header_page - parse the data stored in the header page
4405 * @pevent: the handle to the pevent
4406 * @buf: the buffer storing the header page format string
4407 * @size: the size of @buf
4408 * @long_size: the long size to use if there is no header
4410 * This parses the header page format for information on the
4411 * ring buffer used. The @buf should be copied from
4413 * /sys/kernel/debug/tracing/events/header_page
4415 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
4422 * Old kernels did not have header page info.
4423 * Sorry but we just use what we find here in user space.
4425 pevent->header_page_ts_size = sizeof(long long);
4426 pevent->header_page_size_size = long_size;
4427 pevent->header_page_data_offset = sizeof(long long) + long_size;
4428 pevent->old_format = 1;
4431 init_input_buf(buf, size);
4433 parse_header_field("timestamp", &pevent->header_page_ts_offset,
4434 &pevent->header_page_ts_size, 1);
4435 parse_header_field("commit", &pevent->header_page_size_offset,
4436 &pevent->header_page_size_size, 1);
4437 parse_header_field("overwrite", &pevent->header_page_overwrite,
4439 parse_header_field("data", &pevent->header_page_data_offset,
4440 &pevent->header_page_data_size, 1);
4445 static int event_matches(struct event_format *event,
4446 int id, const char *sys_name,
4447 const char *event_name)
4449 if (id >= 0 && id != event->id)
4452 if (event_name && (strcmp(event_name, event->name) != 0))
4455 if (sys_name && (strcmp(sys_name, event->system) != 0))
4461 static void free_handler(struct event_handler *handle)
4463 free((void *)handle->sys_name);
4464 free((void *)handle->event_name);
4468 static int find_event_handle(struct pevent *pevent, struct event_format *event)
4470 struct event_handler *handle, **next;
4472 for (next = &pevent->handlers; *next;
4473 next = &(*next)->next) {
4475 if (event_matches(event, handle->id,
4477 handle->event_name))
4484 pr_stat("overriding event (%d) %s:%s with new print handler",
4485 event->id, event->system, event->name);
4487 event->handler = handle->func;
4488 event->context = handle->context;
4490 *next = handle->next;
4491 free_handler(handle);
4497 * pevent_parse_event - parse the event format
4498 * @pevent: the handle to the pevent
4499 * @buf: the buffer storing the event format string
4500 * @size: the size of @buf
4501 * @sys: the system the event belongs to
4503 * This parses the event format and creates an event structure
4504 * to quickly parse raw data for a given event.
4506 * These files currently come from:
4508 * /sys/kernel/debug/tracing/events/.../.../format
4510 int pevent_parse_event(struct pevent *pevent,
4511 const char *buf, unsigned long size,
4514 struct event_format *event;
4517 init_input_buf(buf, size);
4519 event = alloc_event();
4523 event->name = event_read_name();
4530 if (strcmp(sys, "ftrace") == 0) {
4532 event->flags |= EVENT_FL_ISFTRACE;
4534 if (strcmp(event->name, "bprint") == 0)
4535 event->flags |= EVENT_FL_ISBPRINT;
4538 event->id = event_read_id();
4540 die("failed to read event id");
4542 event->system = strdup(sys);
4544 /* Add pevent to event so that it can be referenced */
4545 event->pevent = pevent;
4547 ret = event_read_format(event);
4549 do_warning("failed to read event format for %s", event->name);
4554 * If the event has an override, don't print warnings if the event
4555 * print format fails to parse.
4557 if (find_event_handle(pevent, event))
4560 ret = event_read_print(event);
4562 do_warning("failed to read event print fmt for %s",
4569 add_event(pevent, event);
4571 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
4572 struct format_field *field;
4573 struct print_arg *arg, **list;
4575 /* old ftrace had no args */
4577 list = &event->print_fmt.args;
4578 for (field = event->format.fields; field; field = field->next) {
4582 arg->type = PRINT_FIELD;
4583 arg->field.name = strdup(field->name);
4584 arg->field.field = field;
4589 #define PRINT_ARGS 0
4590 if (PRINT_ARGS && event->print_fmt.args)
4591 print_args(event->print_fmt.args);
4596 event->flags |= EVENT_FL_FAILED;
4597 /* still add it even if it failed */
4598 add_event(pevent, event);
4602 int get_field_val(struct trace_seq *s, struct format_field *field,
4603 const char *name, struct pevent_record *record,
4604 unsigned long long *val, int err)
4608 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4612 if (pevent_read_number_field(field, record->data, val)) {
4614 trace_seq_printf(s, " %s=INVALID", name);
4622 * pevent_get_field_raw - return the raw pointer into the data field
4623 * @s: The seq to print to on error
4624 * @event: the event that the field is for
4625 * @name: The name of the field
4626 * @record: The record with the field name.
4627 * @len: place to store the field length.
4628 * @err: print default error if failed.
4630 * Returns a pointer into record->data of the field and places
4631 * the length of the field in @len.
4633 * On failure, it returns NULL.
4635 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
4636 const char *name, struct pevent_record *record,
4639 struct format_field *field;
4640 void *data = record->data;
4647 field = pevent_find_field(event, name);
4651 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4655 /* Allow @len to be NULL */
4659 offset = field->offset;
4660 if (field->flags & FIELD_IS_DYNAMIC) {
4661 offset = pevent_read_number(event->pevent,
4662 data + offset, field->size);
4663 *len = offset >> 16;
4668 return data + offset;
4672 * pevent_get_field_val - find a field and return its value
4673 * @s: The seq to print to on error
4674 * @event: the event that the field is for
4675 * @name: The name of the field
4676 * @record: The record with the field name.
4677 * @val: place to store the value of the field.
4678 * @err: print default error if failed.
4680 * Returns 0 on success -1 on field not found.
4682 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
4683 const char *name, struct pevent_record *record,
4684 unsigned long long *val, int err)
4686 struct format_field *field;
4691 field = pevent_find_field(event, name);
4693 return get_field_val(s, field, name, record, val, err);
4697 * pevent_get_common_field_val - find a common field and return its value
4698 * @s: The seq to print to on error
4699 * @event: the event that the field is for
4700 * @name: The name of the field
4701 * @record: The record with the field name.
4702 * @val: place to store the value of the field.
4703 * @err: print default error if failed.
4705 * Returns 0 on success -1 on field not found.
4707 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
4708 const char *name, struct pevent_record *record,
4709 unsigned long long *val, int err)
4711 struct format_field *field;
4716 field = pevent_find_common_field(event, name);
4718 return get_field_val(s, field, name, record, val, err);
4722 * pevent_get_any_field_val - find a any field and return its value
4723 * @s: The seq to print to on error
4724 * @event: the event that the field is for
4725 * @name: The name of the field
4726 * @record: The record with the field name.
4727 * @val: place to store the value of the field.
4728 * @err: print default error if failed.
4730 * Returns 0 on success -1 on field not found.
4732 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
4733 const char *name, struct pevent_record *record,
4734 unsigned long long *val, int err)
4736 struct format_field *field;
4741 field = pevent_find_any_field(event, name);
4743 return get_field_val(s, field, name, record, val, err);
4747 * pevent_print_num_field - print a field and a format
4748 * @s: The seq to print to
4749 * @fmt: The printf format to print the field with.
4750 * @event: the event that the field is for
4751 * @name: The name of the field
4752 * @record: The record with the field name.
4753 * @err: print default error if failed.
4755 * Returns: 0 on success, -1 field not fould, or 1 if buffer is full.
4757 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
4758 struct event_format *event, const char *name,
4759 struct pevent_record *record, int err)
4761 struct format_field *field = pevent_find_field(event, name);
4762 unsigned long long val;
4767 if (pevent_read_number_field(field, record->data, &val))
4770 return trace_seq_printf(s, fmt, val);
4774 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
4778 static void free_func_handle(struct pevent_function_handler *func)
4780 struct pevent_func_params *params;
4784 while (func->params) {
4785 params = func->params;
4786 func->params = params->next;
4794 * pevent_register_print_function - register a helper function
4795 * @pevent: the handle to the pevent
4796 * @func: the function to process the helper function
4797 * @name: the name of the helper function
4798 * @parameters: A list of enum pevent_func_arg_type
4800 * Some events may have helper functions in the print format arguments.
4801 * This allows a plugin to dynmically create a way to process one
4802 * of these functions.
4804 * The @parameters is a variable list of pevent_func_arg_type enums that
4805 * must end with PEVENT_FUNC_ARG_VOID.
4807 int pevent_register_print_function(struct pevent *pevent,
4808 pevent_func_handler func,
4809 enum pevent_func_arg_type ret_type,
4812 struct pevent_function_handler *func_handle;
4813 struct pevent_func_params **next_param;
4814 struct pevent_func_params *param;
4815 enum pevent_func_arg_type type;
4818 func_handle = find_func_handler(pevent, name);
4821 * This is most like caused by the users own
4822 * plugins updating the function. This overrides the
4825 pr_stat("override of function helper '%s'", name);
4826 remove_func_handler(pevent, name);
4829 func_handle = malloc_or_die(sizeof(*func_handle));
4830 memset(func_handle, 0, sizeof(*func_handle));
4832 func_handle->ret_type = ret_type;
4833 func_handle->name = strdup(name);
4834 func_handle->func = func;
4835 if (!func_handle->name)
4836 die("Failed to allocate function name");
4838 next_param = &(func_handle->params);
4841 type = va_arg(ap, enum pevent_func_arg_type);
4842 if (type == PEVENT_FUNC_ARG_VOID)
4845 if (type < 0 || type >= PEVENT_FUNC_ARG_MAX_TYPES) {
4846 warning("Invalid argument type %d", type);
4850 param = malloc_or_die(sizeof(*param));
4854 *next_param = param;
4855 next_param = &(param->next);
4857 func_handle->nr_args++;
4861 func_handle->next = pevent->func_handlers;
4862 pevent->func_handlers = func_handle;
4867 free_func_handle(func_handle);
4872 * pevent_register_event_handle - register a way to parse an event
4873 * @pevent: the handle to the pevent
4874 * @id: the id of the event to register
4875 * @sys_name: the system name the event belongs to
4876 * @event_name: the name of the event
4877 * @func: the function to call to parse the event information
4879 * This function allows a developer to override the parsing of
4880 * a given event. If for some reason the default print format
4881 * is not sufficient, this function will register a function
4882 * for an event to be used to parse the data instead.
4884 * If @id is >= 0, then it is used to find the event.
4885 * else @sys_name and @event_name are used.
4887 int pevent_register_event_handler(struct pevent *pevent,
4888 int id, char *sys_name, char *event_name,
4889 pevent_event_handler_func func,
4892 struct event_format *event;
4893 struct event_handler *handle;
4897 event = pevent_find_event(pevent, id);
4900 if (event_name && (strcmp(event_name, event->name) != 0))
4902 if (sys_name && (strcmp(sys_name, event->system) != 0))
4905 event = pevent_find_event_by_name(pevent, sys_name, event_name);
4910 pr_stat("overriding event (%d) %s:%s with new print handler",
4911 event->id, event->system, event->name);
4913 event->handler = func;
4914 event->context = context;
4918 /* Save for later use. */
4919 handle = malloc_or_die(sizeof(*handle));
4920 memset(handle, 0, sizeof(*handle));
4923 handle->event_name = strdup(event_name);
4925 handle->sys_name = strdup(sys_name);
4927 handle->func = func;
4928 handle->next = pevent->handlers;
4929 pevent->handlers = handle;
4930 handle->context = context;
4936 * pevent_alloc - create a pevent handle
4938 struct pevent *pevent_alloc(void)
4940 struct pevent *pevent;
4942 pevent = malloc(sizeof(*pevent));
4945 memset(pevent, 0, sizeof(*pevent));
4946 pevent->ref_count = 1;
4951 void pevent_ref(struct pevent *pevent)
4953 pevent->ref_count++;
4956 static void free_format_fields(struct format_field *field)
4958 struct format_field *next;
4969 static void free_formats(struct format *format)
4971 free_format_fields(format->common_fields);
4972 free_format_fields(format->fields);
4975 static void free_event(struct event_format *event)
4978 free(event->system);
4980 free_formats(&event->format);
4982 free(event->print_fmt.format);
4983 free_args(event->print_fmt.args);
4989 * pevent_free - free a pevent handle
4990 * @pevent: the pevent handle to free
4992 void pevent_free(struct pevent *pevent)
4994 struct cmdline_list *cmdlist, *cmdnext;
4995 struct func_list *funclist, *funcnext;
4996 struct printk_list *printklist, *printknext;
4997 struct pevent_function_handler *func_handler;
4998 struct event_handler *handle;
5004 cmdlist = pevent->cmdlist;
5005 funclist = pevent->funclist;
5006 printklist = pevent->printklist;
5008 pevent->ref_count--;
5009 if (pevent->ref_count)
5012 if (pevent->cmdlines) {
5013 for (i = 0; i < pevent->cmdline_count; i++)
5014 free(pevent->cmdlines[i].comm);
5015 free(pevent->cmdlines);
5019 cmdnext = cmdlist->next;
5020 free(cmdlist->comm);
5025 if (pevent->func_map) {
5026 for (i = 0; i < pevent->func_count; i++) {
5027 free(pevent->func_map[i].func);
5028 free(pevent->func_map[i].mod);
5030 free(pevent->func_map);
5034 funcnext = funclist->next;
5035 free(funclist->func);
5036 free(funclist->mod);
5038 funclist = funcnext;
5041 while (pevent->func_handlers) {
5042 func_handler = pevent->func_handlers;
5043 pevent->func_handlers = func_handler->next;
5044 free_func_handle(func_handler);
5047 if (pevent->printk_map) {
5048 for (i = 0; i < pevent->printk_count; i++)
5049 free(pevent->printk_map[i].printk);
5050 free(pevent->printk_map);
5053 while (printklist) {
5054 printknext = printklist->next;
5055 free(printklist->printk);
5057 printklist = printknext;
5060 for (i = 0; i < pevent->nr_events; i++)
5061 free_event(pevent->events[i]);
5063 while (pevent->handlers) {
5064 handle = pevent->handlers;
5065 pevent->handlers = handle->next;
5066 free_handler(handle);
5069 free(pevent->events);
5070 free(pevent->sort_events);
5075 void pevent_unref(struct pevent *pevent)
5077 pevent_free(pevent);