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;
1442 static int event_read_format(struct event_format *event)
1447 if (read_expected_item(EVENT_ITEM, "format") < 0)
1450 if (read_expected(EVENT_OP, ":") < 0)
1453 if (read_expect_type(EVENT_NEWLINE, &token))
1457 ret = event_read_fields(event, &event->format.common_fields);
1460 event->format.nr_common = ret;
1462 ret = event_read_fields(event, &event->format.fields);
1465 event->format.nr_fields = ret;
1474 static enum event_type
1475 process_arg_token(struct event_format *event, struct print_arg *arg,
1476 char **tok, enum event_type type);
1478 static enum event_type
1479 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1481 enum event_type type;
1484 type = read_token(&token);
1487 return process_arg_token(event, arg, tok, type);
1490 static enum event_type
1491 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1493 static enum event_type
1494 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1496 struct print_arg *arg, *left, *right;
1497 enum event_type type;
1502 right = alloc_arg();
1504 arg->type = PRINT_OP;
1505 arg->op.left = left;
1506 arg->op.right = right;
1509 type = process_arg(event, left, &token);
1512 /* Handle other operations in the arguments */
1513 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1514 type = process_op(event, left, &token);
1518 if (test_type_token(type, token, EVENT_OP, ":"))
1523 type = process_arg(event, right, &token);
1525 top->op.right = arg;
1531 /* Top may point to itself */
1532 top->op.right = NULL;
1538 static enum event_type
1539 process_array(struct event_format *event, struct print_arg *top, char **tok)
1541 struct print_arg *arg;
1542 enum event_type type;
1548 type = process_arg(event, arg, &token);
1549 if (test_type_token(type, token, EVENT_OP, "]"))
1552 top->op.right = arg;
1555 type = read_token_item(&token);
1567 static int get_op_prio(char *op)
1581 /* '>>' and '<<' are 8 */
1585 /* '==' and '!=' are 10 */
1595 do_warning("unknown op '%c'", op[0]);
1599 if (strcmp(op, "++") == 0 ||
1600 strcmp(op, "--") == 0) {
1602 } else 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) {
1613 } else if (strcmp(op, "||") == 0) {
1616 do_warning("unknown op '%s'", op);
1622 static int set_op_prio(struct print_arg *arg)
1625 /* single ops are the greatest */
1626 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1629 arg->op.prio = get_op_prio(arg->op.op);
1631 return arg->op.prio;
1634 /* Note, *tok does not get freed, but will most likely be saved */
1635 static enum event_type
1636 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1638 struct print_arg *left, *right = NULL;
1639 enum event_type type;
1642 /* the op is passed in via tok */
1645 if (arg->type == PRINT_OP && !arg->op.left) {
1646 /* handle single op */
1648 die("bad op token %s", token);
1658 do_warning("bad op token %s", token);
1663 /* make an empty left */
1665 left->type = PRINT_NULL;
1666 arg->op.left = left;
1668 right = alloc_arg();
1669 arg->op.right = right;
1671 /* do not free the token, it belongs to an op */
1673 type = process_arg(event, right, tok);
1675 } else if (strcmp(token, "?") == 0) {
1678 /* copy the top arg to the left */
1681 arg->type = PRINT_OP;
1683 arg->op.left = left;
1686 type = process_cond(event, arg, tok);
1688 } else if (strcmp(token, ">>") == 0 ||
1689 strcmp(token, "<<") == 0 ||
1690 strcmp(token, "&") == 0 ||
1691 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) {
1706 /* copy the top arg to the left */
1709 arg->type = PRINT_OP;
1711 arg->op.left = left;
1713 if (set_op_prio(arg) == -1) {
1714 event->flags |= EVENT_FL_FAILED;
1718 type = read_token_item(&token);
1721 /* could just be a type pointer */
1722 if ((strcmp(arg->op.op, "*") == 0) &&
1723 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1724 if (left->type != PRINT_ATOM)
1725 die("bad pointer type");
1726 left->atom.atom = realloc(left->atom.atom,
1727 strlen(left->atom.atom) + 3);
1728 strcat(left->atom.atom, " *");
1736 right = alloc_arg();
1737 type = process_arg_token(event, right, tok, type);
1738 arg->op.right = right;
1740 } else if (strcmp(token, "[") == 0) {
1745 arg->type = PRINT_OP;
1747 arg->op.left = left;
1751 type = process_array(event, arg, tok);
1754 do_warning("unknown op '%s'", token);
1755 event->flags |= EVENT_FL_FAILED;
1756 /* the arg is now the left side */
1760 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
1763 /* higher prios need to be closer to the root */
1764 prio = get_op_prio(*tok);
1766 if (prio > arg->op.prio)
1767 return process_op(event, arg, tok);
1769 return process_op(event, right, tok);
1780 static enum event_type
1781 process_entry(struct event_format *event __unused, struct print_arg *arg,
1784 enum event_type type;
1788 if (read_expected(EVENT_OP, "->") < 0)
1791 if (read_expect_type(EVENT_ITEM, &token) < 0)
1795 arg->type = PRINT_FIELD;
1796 arg->field.name = field;
1798 if (is_flag_field) {
1799 arg->field.field = pevent_find_any_field(event, arg->field.name);
1800 arg->field.field->flags |= FIELD_IS_FLAG;
1802 } else if (is_symbolic_field) {
1803 arg->field.field = pevent_find_any_field(event, arg->field.name);
1804 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
1805 is_symbolic_field = 0;
1808 type = read_token(&token);
1820 static char *arg_eval (struct print_arg *arg);
1822 static unsigned long long
1823 eval_type_str(unsigned long long val, const char *type, int pointer)
1833 if (type[len-1] != '*') {
1834 do_warning("pointer expected with non pointer type");
1838 ref = malloc_or_die(len);
1839 memcpy(ref, type, len);
1841 /* chop off the " *" */
1844 val = eval_type_str(val, ref, 0);
1849 /* check if this is a pointer */
1850 if (type[len - 1] == '*')
1853 /* Try to figure out the arg size*/
1854 if (strncmp(type, "struct", 6) == 0)
1858 if (strcmp(type, "u8") == 0)
1861 if (strcmp(type, "u16") == 0)
1862 return val & 0xffff;
1864 if (strcmp(type, "u32") == 0)
1865 return val & 0xffffffff;
1867 if (strcmp(type, "u64") == 0 ||
1868 strcmp(type, "s64"))
1871 if (strcmp(type, "s8") == 0)
1872 return (unsigned long long)(char)val & 0xff;
1874 if (strcmp(type, "s16") == 0)
1875 return (unsigned long long)(short)val & 0xffff;
1877 if (strcmp(type, "s32") == 0)
1878 return (unsigned long long)(int)val & 0xffffffff;
1880 if (strncmp(type, "unsigned ", 9) == 0) {
1885 if (strcmp(type, "char") == 0) {
1887 return (unsigned long long)(char)val & 0xff;
1892 if (strcmp(type, "short") == 0) {
1894 return (unsigned long long)(short)val & 0xffff;
1896 return val & 0xffff;
1899 if (strcmp(type, "int") == 0) {
1901 return (unsigned long long)(int)val & 0xffffffff;
1903 return val & 0xffffffff;
1910 * Try to figure out the type.
1912 static unsigned long long
1913 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
1915 if (arg->type != PRINT_TYPE)
1916 die("expected type argument");
1918 return eval_type_str(val, arg->typecast.type, pointer);
1921 static int arg_num_eval(struct print_arg *arg, long long *val)
1923 long long left, right;
1926 switch (arg->type) {
1928 *val = strtoll(arg->atom.atom, NULL, 0);
1931 ret = arg_num_eval(arg->typecast.item, val);
1934 *val = eval_type(*val, arg, 0);
1937 switch (arg->op.op[0]) {
1939 ret = arg_num_eval(arg->op.left, &left);
1942 ret = arg_num_eval(arg->op.right, &right);
1946 *val = left || right;
1948 *val = left | right;
1951 ret = arg_num_eval(arg->op.left, &left);
1954 ret = arg_num_eval(arg->op.right, &right);
1958 *val = left && right;
1960 *val = left & right;
1963 ret = arg_num_eval(arg->op.left, &left);
1966 ret = arg_num_eval(arg->op.right, &right);
1969 switch (arg->op.op[1]) {
1971 *val = left < right;
1974 *val = left << right;
1977 *val = left <= right;
1980 do_warning("unknown op '%s'", arg->op.op);
1985 ret = arg_num_eval(arg->op.left, &left);
1988 ret = arg_num_eval(arg->op.right, &right);
1991 switch (arg->op.op[1]) {
1993 *val = left > right;
1996 *val = left >> right;
1999 *val = left >= right;
2002 do_warning("unknown op '%s'", arg->op.op);
2007 ret = arg_num_eval(arg->op.left, &left);
2010 ret = arg_num_eval(arg->op.right, &right);
2014 if (arg->op.op[1] != '=') {
2015 do_warning("unknown op '%s'", arg->op.op);
2018 *val = left == right;
2021 ret = arg_num_eval(arg->op.left, &left);
2024 ret = arg_num_eval(arg->op.right, &right);
2028 switch (arg->op.op[1]) {
2030 *val = left != right;
2033 do_warning("unknown op '%s'", arg->op.op);
2038 /* check for negative */
2039 if (arg->op.left->type == PRINT_NULL)
2042 ret = arg_num_eval(arg->op.left, &left);
2045 ret = arg_num_eval(arg->op.right, &right);
2048 *val = left - right;
2051 if (arg->op.left->type == PRINT_NULL)
2054 ret = arg_num_eval(arg->op.left, &left);
2057 ret = arg_num_eval(arg->op.right, &right);
2060 *val = left + right;
2063 do_warning("unknown op '%s'", arg->op.op);
2069 case PRINT_FIELD ... PRINT_SYMBOL:
2073 do_warning("invalid eval type %d", arg->type);
2080 static char *arg_eval (struct print_arg *arg)
2083 static char buf[20];
2085 switch (arg->type) {
2087 return arg->atom.atom;
2089 return arg_eval(arg->typecast.item);
2091 if (!arg_num_eval(arg, &val))
2093 sprintf(buf, "%lld", val);
2097 case PRINT_FIELD ... PRINT_SYMBOL:
2101 die("invalid eval type %d", arg->type);
2108 static enum event_type
2109 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2111 enum event_type type;
2112 struct print_arg *arg = NULL;
2113 struct print_flag_sym *field;
2119 type = read_token_item(&token);
2120 if (test_type_token(type, token, EVENT_OP, "{"))
2126 type = process_arg(event, arg, &token);
2127 if (test_type_token(type, token, EVENT_DELIM, ","))
2130 field = malloc_or_die(sizeof(*field));
2131 memset(field, 0, sizeof(*field));
2133 value = arg_eval(arg);
2136 field->value = strdup(value);
2142 type = process_arg(event, arg, &token);
2143 if (test_type_token(type, token, EVENT_OP, "}"))
2146 value = arg_eval(arg);
2149 field->str = strdup(value);
2154 list = &field->next;
2157 type = read_token_item(&token);
2158 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2171 static enum event_type
2172 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2174 struct print_arg *field;
2175 enum event_type type;
2178 memset(arg, 0, sizeof(*arg));
2179 arg->type = PRINT_FLAGS;
2181 field = alloc_arg();
2183 type = process_arg(event, field, &token);
2185 /* Handle operations in the first argument */
2186 while (type == EVENT_OP)
2187 type = process_op(event, field, &token);
2189 if (test_type_token(type, token, EVENT_DELIM, ","))
2193 arg->flags.field = field;
2195 type = read_token_item(&token);
2196 if (event_item_type(type)) {
2197 arg->flags.delim = token;
2198 type = read_token_item(&token);
2201 if (test_type_token(type, token, EVENT_DELIM, ","))
2204 type = process_fields(event, &arg->flags.flags, &token);
2205 if (test_type_token(type, token, EVENT_DELIM, ")"))
2209 type = read_token_item(tok);
2218 static enum event_type
2219 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2221 struct print_arg *field;
2222 enum event_type type;
2225 memset(arg, 0, sizeof(*arg));
2226 arg->type = PRINT_SYMBOL;
2228 field = alloc_arg();
2230 type = process_arg(event, field, &token);
2231 if (test_type_token(type, token, EVENT_DELIM, ","))
2234 arg->symbol.field = field;
2236 type = process_fields(event, &arg->symbol.symbols, &token);
2237 if (test_type_token(type, token, EVENT_DELIM, ")"))
2241 type = read_token_item(tok);
2250 static enum event_type
2251 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2253 struct format_field *field;
2254 enum event_type type;
2257 memset(arg, 0, sizeof(*arg));
2258 arg->type = PRINT_DYNAMIC_ARRAY;
2261 * The item within the parenthesis is another field that holds
2262 * the index into where the array starts.
2264 type = read_token(&token);
2266 if (type != EVENT_ITEM)
2269 /* Find the field */
2271 field = pevent_find_field(event, token);
2275 arg->dynarray.field = field;
2276 arg->dynarray.index = 0;
2278 if (read_expected(EVENT_DELIM, ")") < 0)
2282 type = read_token_item(&token);
2284 if (type != EVENT_OP || strcmp(token, "[") != 0)
2289 type = process_arg(event, arg, &token);
2290 if (type == EVENT_ERROR)
2293 if (!test_type_token(type, token, EVENT_OP, "]"))
2297 type = read_token_item(tok);
2307 static enum event_type
2308 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2310 struct print_arg *item_arg;
2311 enum event_type type;
2314 type = process_arg(event, arg, &token);
2316 if (type == EVENT_ERROR)
2319 if (type == EVENT_OP)
2320 type = process_op(event, arg, &token);
2322 if (type == EVENT_ERROR)
2325 if (test_type_token(type, token, EVENT_DELIM, ")"))
2329 type = read_token_item(&token);
2332 * If the next token is an item or another open paren, then
2333 * this was a typecast.
2335 if (event_item_type(type) ||
2336 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2338 /* make this a typecast and contine */
2340 /* prevous must be an atom */
2341 if (arg->type != PRINT_ATOM)
2342 die("previous needed to be PRINT_ATOM");
2344 item_arg = alloc_arg();
2346 arg->type = PRINT_TYPE;
2347 arg->typecast.type = arg->atom.atom;
2348 arg->typecast.item = item_arg;
2349 type = process_arg_token(event, item_arg, &token, type);
2363 static enum event_type
2364 process_str(struct event_format *event __unused, struct print_arg *arg, char **tok)
2366 enum event_type type;
2369 if (read_expect_type(EVENT_ITEM, &token) < 0)
2372 arg->type = PRINT_STRING;
2373 arg->string.string = token;
2374 arg->string.offset = -1;
2376 if (read_expected(EVENT_DELIM, ")") < 0)
2379 type = read_token(&token);
2391 static struct pevent_function_handler *
2392 find_func_handler(struct pevent *pevent, char *func_name)
2394 struct pevent_function_handler *func;
2396 for (func = pevent->func_handlers; func; func = func->next) {
2397 if (strcmp(func->name, func_name) == 0)
2404 static void remove_func_handler(struct pevent *pevent, char *func_name)
2406 struct pevent_function_handler *func;
2407 struct pevent_function_handler **next;
2409 next = &pevent->func_handlers;
2410 while ((func = *next)) {
2411 if (strcmp(func->name, func_name) == 0) {
2413 free_func_handle(func);
2420 static enum event_type
2421 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2422 struct print_arg *arg, char **tok)
2424 struct print_arg **next_arg;
2425 struct print_arg *farg;
2426 enum event_type type;
2431 arg->type = PRINT_FUNC;
2432 arg->func.func = func;
2436 next_arg = &(arg->func.args);
2437 for (i = 0; i < func->nr_args; i++) {
2439 type = process_arg(event, farg, &token);
2440 if (i < (func->nr_args - 1))
2445 if (test_type_token(type, token, EVENT_DELIM, test)) {
2452 next_arg = &(farg->next);
2456 type = read_token(&token);
2462 static enum event_type
2463 process_function(struct event_format *event, struct print_arg *arg,
2464 char *token, char **tok)
2466 struct pevent_function_handler *func;
2468 if (strcmp(token, "__print_flags") == 0) {
2471 return process_flags(event, arg, tok);
2473 if (strcmp(token, "__print_symbolic") == 0) {
2475 is_symbolic_field = 1;
2476 return process_symbols(event, arg, tok);
2478 if (strcmp(token, "__get_str") == 0) {
2480 return process_str(event, arg, tok);
2482 if (strcmp(token, "__get_dynamic_array") == 0) {
2484 return process_dynamic_array(event, arg, tok);
2487 func = find_func_handler(event->pevent, token);
2490 return process_func_handler(event, func, arg, tok);
2493 do_warning("function %s not defined", token);
2498 static enum event_type
2499 process_arg_token(struct event_format *event, struct print_arg *arg,
2500 char **tok, enum event_type type)
2509 if (strcmp(token, "REC") == 0) {
2511 type = process_entry(event, arg, &token);
2515 /* test the next token */
2516 type = read_token_item(&token);
2519 * If the next token is a parenthesis, then this
2522 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
2525 /* this will free atom. */
2526 type = process_function(event, arg, atom, &token);
2529 /* atoms can be more than one token long */
2530 while (type == EVENT_ITEM) {
2531 atom = realloc(atom, strlen(atom) + strlen(token) + 2);
2533 strcat(atom, token);
2535 type = read_token_item(&token);
2538 arg->type = PRINT_ATOM;
2539 arg->atom.atom = atom;
2544 arg->type = PRINT_ATOM;
2545 arg->atom.atom = token;
2546 type = read_token_item(&token);
2549 if (strcmp(token, "(") == 0) {
2551 type = process_paren(event, arg, &token);
2555 /* handle single ops */
2556 arg->type = PRINT_OP;
2558 arg->op.left = NULL;
2559 type = process_op(event, arg, &token);
2561 /* On error, the op is freed */
2562 if (type == EVENT_ERROR)
2565 /* return error type if errored */
2568 case EVENT_ERROR ... EVENT_NEWLINE:
2570 die("unexpected type %d", type);
2577 static int event_read_print_args(struct event_format *event, struct print_arg **list)
2579 enum event_type type = EVENT_ERROR;
2580 struct print_arg *arg;
2585 if (type == EVENT_NEWLINE) {
2586 type = read_token_item(&token);
2592 type = process_arg(event, arg, &token);
2594 if (type == EVENT_ERROR) {
2603 if (type == EVENT_OP) {
2604 type = process_op(event, arg, &token);
2606 if (type == EVENT_ERROR) {
2615 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
2622 } while (type != EVENT_NONE);
2624 if (type != EVENT_NONE && type != EVENT_ERROR)
2630 static int event_read_print(struct event_format *event)
2632 enum event_type type;
2636 if (read_expected_item(EVENT_ITEM, "print") < 0)
2639 if (read_expected(EVENT_ITEM, "fmt") < 0)
2642 if (read_expected(EVENT_OP, ":") < 0)
2645 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
2649 event->print_fmt.format = token;
2650 event->print_fmt.args = NULL;
2652 /* ok to have no arg */
2653 type = read_token_item(&token);
2655 if (type == EVENT_NONE)
2658 /* Handle concatenation of print lines */
2659 if (type == EVENT_DQUOTE) {
2662 cat = malloc_or_die(strlen(event->print_fmt.format) +
2664 strcpy(cat, event->print_fmt.format);
2667 free_token(event->print_fmt.format);
2668 event->print_fmt.format = NULL;
2673 if (test_type_token(type, token, EVENT_DELIM, ","))
2678 ret = event_read_print_args(event, &event->print_fmt.args);
2690 * pevent_find_common_field - return a common field by event
2691 * @event: handle for the event
2692 * @name: the name of the common field to return
2694 * Returns a common field from the event by the given @name.
2695 * This only searchs the common fields and not all field.
2697 struct format_field *
2698 pevent_find_common_field(struct event_format *event, const char *name)
2700 struct format_field *format;
2702 for (format = event->format.common_fields;
2703 format; format = format->next) {
2704 if (strcmp(format->name, name) == 0)
2712 * pevent_find_field - find a non-common field
2713 * @event: handle for the event
2714 * @name: the name of the non-common field
2716 * Returns a non-common field by the given @name.
2717 * This does not search common fields.
2719 struct format_field *
2720 pevent_find_field(struct event_format *event, const char *name)
2722 struct format_field *format;
2724 for (format = event->format.fields;
2725 format; format = format->next) {
2726 if (strcmp(format->name, name) == 0)
2734 * pevent_find_any_field - find any field by name
2735 * @event: handle for the event
2736 * @name: the name of the field
2738 * Returns a field by the given @name.
2739 * This searchs the common field names first, then
2740 * the non-common ones if a common one was not found.
2742 struct format_field *
2743 pevent_find_any_field(struct event_format *event, const char *name)
2745 struct format_field *format;
2747 format = pevent_find_common_field(event, name);
2750 return pevent_find_field(event, name);
2754 * pevent_read_number - read a number from data
2755 * @pevent: handle for the pevent
2756 * @ptr: the raw data
2757 * @size: the size of the data that holds the number
2759 * Returns the number (converted to host) from the
2762 unsigned long long pevent_read_number(struct pevent *pevent,
2763 const void *ptr, int size)
2767 return *(unsigned char *)ptr;
2769 return data2host2(pevent, ptr);
2771 return data2host4(pevent, ptr);
2773 return data2host8(pevent, ptr);
2781 * pevent_read_number_field - read a number from data
2782 * @field: a handle to the field
2783 * @data: the raw data to read
2784 * @value: the value to place the number in
2786 * Reads raw data according to a field offset and size,
2787 * and translates it into @value.
2789 * Returns 0 on success, -1 otherwise.
2791 int pevent_read_number_field(struct format_field *field, const void *data,
2792 unsigned long long *value)
2796 switch (field->size) {
2801 *value = pevent_read_number(field->event->pevent,
2802 data + field->offset, field->size);
2809 static int get_common_info(struct pevent *pevent,
2810 const char *type, int *offset, int *size)
2812 struct event_format *event;
2813 struct format_field *field;
2816 * All events should have the same common elements.
2817 * Pick any event to find where the type is;
2819 if (!pevent->events)
2820 die("no event_list!");
2822 event = pevent->events[0];
2823 field = pevent_find_common_field(event, type);
2825 die("field '%s' not found", type);
2827 *offset = field->offset;
2828 *size = field->size;
2833 static int __parse_common(struct pevent *pevent, void *data,
2834 int *size, int *offset, const char *name)
2839 ret = get_common_info(pevent, name, offset, size);
2843 return pevent_read_number(pevent, data + *offset, *size);
2846 static int trace_parse_common_type(struct pevent *pevent, void *data)
2848 return __parse_common(pevent, data,
2849 &pevent->type_size, &pevent->type_offset,
2853 static int parse_common_pid(struct pevent *pevent, void *data)
2855 return __parse_common(pevent, data,
2856 &pevent->pid_size, &pevent->pid_offset,
2860 static int parse_common_pc(struct pevent *pevent, void *data)
2862 return __parse_common(pevent, data,
2863 &pevent->pc_size, &pevent->pc_offset,
2864 "common_preempt_count");
2867 static int parse_common_flags(struct pevent *pevent, void *data)
2869 return __parse_common(pevent, data,
2870 &pevent->flags_size, &pevent->flags_offset,
2874 static int parse_common_lock_depth(struct pevent *pevent, void *data)
2878 ret = __parse_common(pevent, data,
2879 &pevent->ld_size, &pevent->ld_offset,
2880 "common_lock_depth");
2887 static int events_id_cmp(const void *a, const void *b);
2890 * pevent_find_event - find an event by given id
2891 * @pevent: a handle to the pevent
2892 * @id: the id of the event
2894 * Returns an event that has a given @id.
2896 struct event_format *pevent_find_event(struct pevent *pevent, int id)
2898 struct event_format **eventptr;
2899 struct event_format key;
2900 struct event_format *pkey = &key;
2902 /* Check cache first */
2903 if (pevent->last_event && pevent->last_event->id == id)
2904 return pevent->last_event;
2908 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
2909 sizeof(*pevent->events), events_id_cmp);
2912 pevent->last_event = *eventptr;
2920 * pevent_find_event_by_name - find an event by given name
2921 * @pevent: a handle to the pevent
2922 * @sys: the system name to search for
2923 * @name: the name of the event to search for
2925 * This returns an event with a given @name and under the system
2926 * @sys. If @sys is NULL the first event with @name is returned.
2928 struct event_format *
2929 pevent_find_event_by_name(struct pevent *pevent,
2930 const char *sys, const char *name)
2932 struct event_format *event;
2935 if (pevent->last_event &&
2936 strcmp(pevent->last_event->name, name) == 0 &&
2937 (!sys || strcmp(pevent->last_event->system, sys) == 0))
2938 return pevent->last_event;
2940 for (i = 0; i < pevent->nr_events; i++) {
2941 event = pevent->events[i];
2942 if (strcmp(event->name, name) == 0) {
2945 if (strcmp(event->system, sys) == 0)
2949 if (i == pevent->nr_events)
2952 pevent->last_event = event;
2956 static unsigned long long
2957 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
2959 struct pevent *pevent = event->pevent;
2960 unsigned long long val = 0;
2961 unsigned long long left, right;
2962 struct print_arg *typearg = NULL;
2963 struct print_arg *larg;
2964 unsigned long offset;
2965 unsigned int field_size;
2967 switch (arg->type) {
2972 return strtoull(arg->atom.atom, NULL, 0);
2974 if (!arg->field.field) {
2975 arg->field.field = pevent_find_any_field(event, arg->field.name);
2976 if (!arg->field.field)
2977 die("field %s not found", arg->field.name);
2979 /* must be a number */
2980 val = pevent_read_number(pevent, data + arg->field.field->offset,
2981 arg->field.field->size);
2987 val = eval_num_arg(data, size, event, arg->typecast.item);
2988 return eval_type(val, arg, 0);
2995 val = process_defined_func(&s, data, size, event, arg);
2996 trace_seq_destroy(&s);
3000 if (strcmp(arg->op.op, "[") == 0) {
3002 * Arrays are special, since we don't want
3003 * to read the arg as is.
3005 right = eval_num_arg(data, size, event, arg->op.right);
3007 /* handle typecasts */
3008 larg = arg->op.left;
3009 while (larg->type == PRINT_TYPE) {
3012 larg = larg->typecast.item;
3015 /* Default to long size */
3016 field_size = pevent->long_size;
3018 switch (larg->type) {
3019 case PRINT_DYNAMIC_ARRAY:
3020 offset = pevent_read_number(pevent,
3021 data + larg->dynarray.field->offset,
3022 larg->dynarray.field->size);
3023 if (larg->dynarray.field->elementsize)
3024 field_size = larg->dynarray.field->elementsize;
3026 * The actual length of the dynamic array is stored
3027 * in the top half of the field, and the offset
3028 * is in the bottom half of the 32 bit field.
3034 if (!larg->field.field) {
3036 pevent_find_any_field(event, larg->field.name);
3037 if (!larg->field.field)
3038 die("field %s not found", larg->field.name);
3040 field_size = larg->field.field->elementsize;
3041 offset = larg->field.field->offset +
3042 right * larg->field.field->elementsize;
3045 goto default_op; /* oops, all bets off */
3047 val = pevent_read_number(pevent,
3048 data + offset, field_size);
3050 val = eval_type(val, typearg, 1);
3052 } else if (strcmp(arg->op.op, "?") == 0) {
3053 left = eval_num_arg(data, size, event, arg->op.left);
3054 arg = arg->op.right;
3056 val = eval_num_arg(data, size, event, arg->op.left);
3058 val = eval_num_arg(data, size, event, arg->op.right);
3062 left = eval_num_arg(data, size, event, arg->op.left);
3063 right = eval_num_arg(data, size, event, arg->op.right);
3064 switch (arg->op.op[0]) {
3066 switch (arg->op.op[1]) {
3071 val = left != right;
3074 die("unknown op '%s'", arg->op.op);
3082 val = left || right;
3088 val = left && right;
3093 switch (arg->op.op[1]) {
3098 val = left << right;
3101 val = left <= right;
3104 die("unknown op '%s'", arg->op.op);
3108 switch (arg->op.op[1]) {
3113 val = left >> right;
3116 val = left >= right;
3119 die("unknown op '%s'", arg->op.op);
3123 if (arg->op.op[1] != '=')
3124 die("unknown op '%s'", arg->op.op);
3125 val = left == right;
3140 die("unknown op '%s'", arg->op.op);
3143 default: /* not sure what to do there */
3151 unsigned long long value;
3154 static const struct flag flags[] = {
3155 { "HI_SOFTIRQ", 0 },
3156 { "TIMER_SOFTIRQ", 1 },
3157 { "NET_TX_SOFTIRQ", 2 },
3158 { "NET_RX_SOFTIRQ", 3 },
3159 { "BLOCK_SOFTIRQ", 4 },
3160 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3161 { "TASKLET_SOFTIRQ", 6 },
3162 { "SCHED_SOFTIRQ", 7 },
3163 { "HRTIMER_SOFTIRQ", 8 },
3164 { "RCU_SOFTIRQ", 9 },
3166 { "HRTIMER_NORESTART", 0 },
3167 { "HRTIMER_RESTART", 1 },
3170 static unsigned long long eval_flag(const char *flag)
3175 * Some flags in the format files do not get converted.
3176 * If the flag is not numeric, see if it is something that
3177 * we already know about.
3179 if (isdigit(flag[0]))
3180 return strtoull(flag, NULL, 0);
3182 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3183 if (strcmp(flags[i].name, flag) == 0)
3184 return flags[i].value;
3189 static void print_str_to_seq(struct trace_seq *s, const char *format,
3190 int len_arg, const char *str)
3193 trace_seq_printf(s, format, len_arg, str);
3195 trace_seq_printf(s, format, str);
3198 static void print_str_arg(struct trace_seq *s, void *data, int size,
3199 struct event_format *event, const char *format,
3200 int len_arg, struct print_arg *arg)
3202 struct pevent *pevent = event->pevent;
3203 struct print_flag_sym *flag;
3204 unsigned long long val, fval;
3210 switch (arg->type) {
3215 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3218 if (!arg->field.field) {
3219 arg->field.field = pevent_find_any_field(event, arg->field.name);
3220 if (!arg->field.field)
3221 die("field %s not found", arg->field.name);
3223 /* Zero sized fields, mean the rest of the data */
3224 len = arg->field.field->size ? : size - arg->field.field->offset;
3227 * Some events pass in pointers. If this is not an array
3228 * and the size is the same as long_size, assume that it
3231 if (!(arg->field.field->flags & FIELD_IS_ARRAY) &&
3232 arg->field.field->size == pevent->long_size) {
3233 addr = *(unsigned long *)(data + arg->field.field->offset);
3234 trace_seq_printf(s, "%lx", addr);
3237 str = malloc_or_die(len + 1);
3238 memcpy(str, data + arg->field.field->offset, len);
3240 print_str_to_seq(s, format, len_arg, str);
3244 val = eval_num_arg(data, size, event, arg->flags.field);
3246 for (flag = arg->flags.flags; flag; flag = flag->next) {
3247 fval = eval_flag(flag->value);
3248 if (!val && !fval) {
3249 print_str_to_seq(s, format, len_arg, flag->str);
3252 if (fval && (val & fval) == fval) {
3253 if (print && arg->flags.delim)
3254 trace_seq_puts(s, arg->flags.delim);
3255 print_str_to_seq(s, format, len_arg, flag->str);
3262 val = eval_num_arg(data, size, event, arg->symbol.field);
3263 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3264 fval = eval_flag(flag->value);
3266 print_str_to_seq(s, format, len_arg, flag->str);
3274 case PRINT_STRING: {
3277 if (arg->string.offset == -1) {
3278 struct format_field *f;
3280 f = pevent_find_any_field(event, arg->string.string);
3281 arg->string.offset = f->offset;
3283 str_offset = data2host4(pevent, data + arg->string.offset);
3284 str_offset &= 0xffff;
3285 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
3289 trace_seq_printf(s, format, arg->string.string);
3293 * The only op for string should be ? :
3295 if (arg->op.op[0] != '?')
3297 val = eval_num_arg(data, size, event, arg->op.left);
3299 print_str_arg(s, data, size, event,
3300 format, len_arg, arg->op.right->op.left);
3302 print_str_arg(s, data, size, event,
3303 format, len_arg, arg->op.right->op.right);
3306 process_defined_func(s, data, size, event, arg);
3314 static unsigned long long
3315 process_defined_func(struct trace_seq *s, void *data, int size,
3316 struct event_format *event, struct print_arg *arg)
3318 struct pevent_function_handler *func_handle = arg->func.func;
3319 struct pevent_func_params *param;
3320 unsigned long long *args;
3321 unsigned long long ret;
3322 struct print_arg *farg;
3323 struct trace_seq str;
3325 struct save_str *next;
3327 } *strings = NULL, *string;
3330 if (!func_handle->nr_args) {
3331 ret = (*func_handle->func)(s, NULL);
3335 farg = arg->func.args;
3336 param = func_handle->params;
3338 args = malloc_or_die(sizeof(*args) * func_handle->nr_args);
3339 for (i = 0; i < func_handle->nr_args; i++) {
3340 switch (param->type) {
3341 case PEVENT_FUNC_ARG_INT:
3342 case PEVENT_FUNC_ARG_LONG:
3343 case PEVENT_FUNC_ARG_PTR:
3344 args[i] = eval_num_arg(data, size, event, farg);
3346 case PEVENT_FUNC_ARG_STRING:
3347 trace_seq_init(&str);
3348 print_str_arg(&str, data, size, event, "%s", -1, farg);
3349 trace_seq_terminate(&str);
3350 string = malloc_or_die(sizeof(*string));
3351 string->next = strings;
3352 string->str = strdup(str.buffer);
3354 trace_seq_destroy(&str);
3358 * Something went totally wrong, this is not
3359 * an input error, something in this code broke.
3361 die("Unexpected end of arguments\n");
3367 ret = (*func_handle->func)(s, args);
3371 strings = string->next;
3377 /* TBD : handle return type here */
3381 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
3383 struct pevent *pevent = event->pevent;
3384 struct format_field *field, *ip_field;
3385 struct print_arg *args, *arg, **next;
3386 unsigned long long ip, val;
3390 field = pevent->bprint_buf_field;
3391 ip_field = pevent->bprint_ip_field;
3394 field = pevent_find_field(event, "buf");
3396 die("can't find buffer field for binary printk");
3397 ip_field = pevent_find_field(event, "ip");
3399 die("can't find ip field for binary printk");
3400 pevent->bprint_buf_field = field;
3401 pevent->bprint_ip_field = ip_field;
3404 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
3407 * The first arg is the IP pointer.
3414 arg->type = PRINT_ATOM;
3415 arg->atom.atom = malloc_or_die(32);
3416 sprintf(arg->atom.atom, "%lld", ip);
3418 /* skip the first "%pf : " */
3419 for (ptr = fmt + 6, bptr = data + field->offset;
3420 bptr < data + size && *ptr; ptr++) {
3444 /* the pointers are always 4 bytes aligned */
3445 bptr = (void *)(((unsigned long)bptr + 3) &
3452 ls = pevent->long_size;
3459 val = pevent_read_number(pevent, bptr, ls);
3463 arg->type = PRINT_ATOM;
3464 arg->atom.atom = malloc_or_die(32);
3465 sprintf(arg->atom.atom, "%lld", val);
3472 arg->type = PRINT_BSTRING;
3473 arg->string.string = strdup(bptr);
3474 bptr += strlen(bptr) + 1;
3486 static void free_args(struct print_arg *args)
3488 struct print_arg *next;
3499 get_bprint_format(void *data, int size __unused, struct event_format *event)
3501 struct pevent *pevent = event->pevent;
3502 unsigned long long addr;
3503 struct format_field *field;
3504 struct printk_map *printk;
3508 field = pevent->bprint_fmt_field;
3511 field = pevent_find_field(event, "fmt");
3513 die("can't find format field for binary printk");
3514 pevent->bprint_fmt_field = field;
3517 addr = pevent_read_number(pevent, data + field->offset, field->size);
3519 printk = find_printk(pevent, addr);
3521 format = malloc_or_die(45);
3522 sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
3528 /* Remove any quotes. */
3531 format = malloc_or_die(strlen(p) + 10);
3532 sprintf(format, "%s : %s", "%pf", p);
3533 /* remove ending quotes and new line since we will add one too */
3534 p = format + strlen(format) - 1;
3539 if (strcmp(p, "\\n") == 0)
3545 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
3546 struct event_format *event, struct print_arg *arg)
3549 char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
3551 if (arg->type == PRINT_FUNC) {
3552 process_defined_func(s, data, size, event, arg);
3556 if (arg->type != PRINT_FIELD) {
3557 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
3563 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
3564 if (!arg->field.field) {
3566 pevent_find_any_field(event, arg->field.name);
3567 if (!arg->field.field)
3568 die("field %s not found", arg->field.name);
3570 if (arg->field.field->size != 6) {
3571 trace_seq_printf(s, "INVALIDMAC");
3574 buf = data + arg->field.field->offset;
3575 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
3578 static void print_event_fields(struct trace_seq *s, void *data, int size,
3579 struct event_format *event)
3581 struct format_field *field;
3582 unsigned long long val;
3583 unsigned int offset, len, i;
3585 field = event->format.fields;
3587 trace_seq_printf(s, " %s=", field->name);
3588 if (field->flags & FIELD_IS_ARRAY) {
3589 offset = field->offset;
3591 if (field->flags & FIELD_IS_DYNAMIC) {
3592 val = pevent_read_number(event->pevent, data + offset, len);
3597 if (field->flags & FIELD_IS_STRING) {
3598 trace_seq_printf(s, "%s", (char *)data + offset);
3600 trace_seq_puts(s, "ARRAY[");
3601 for (i = 0; i < len; i++) {
3603 trace_seq_puts(s, ", ");
3604 trace_seq_printf(s, "%02x",
3605 *((unsigned char *)data + offset + i));
3607 trace_seq_putc(s, ']');
3610 val = pevent_read_number(event->pevent, data + field->offset,
3612 if (field->flags & FIELD_IS_POINTER) {
3613 trace_seq_printf(s, "0x%llx", val);
3614 } else if (field->flags & FIELD_IS_SIGNED) {
3615 switch (field->size) {
3618 * If field is long then print it in hex.
3619 * A long usually stores pointers.
3621 if (field->flags & FIELD_IS_LONG)
3622 trace_seq_printf(s, "0x%x", (int)val);
3624 trace_seq_printf(s, "%d", (int)val);
3627 trace_seq_printf(s, "%2d", (short)val);
3630 trace_seq_printf(s, "%1d", (char)val);
3633 trace_seq_printf(s, "%lld", val);
3636 if (field->flags & FIELD_IS_LONG)
3637 trace_seq_printf(s, "0x%llx", val);
3639 trace_seq_printf(s, "%llu", val);
3642 field = field->next;
3646 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
3648 struct pevent *pevent = event->pevent;
3649 struct print_fmt *print_fmt = &event->print_fmt;
3650 struct print_arg *arg = print_fmt->args;
3651 struct print_arg *args = NULL;
3652 const char *ptr = print_fmt->format;
3653 unsigned long long val;
3654 struct func_map *func;
3655 const char *saveptr;
3656 char *bprint_fmt = NULL;
3664 if (event->flags & EVENT_FL_FAILED) {
3665 trace_seq_printf(s, "[FAILED TO PARSE]");
3666 print_event_fields(s, data, size, event);
3670 if (event->flags & EVENT_FL_ISBPRINT) {
3671 bprint_fmt = get_bprint_format(data, size, event);
3672 args = make_bprint_args(bprint_fmt, data, size, event);
3677 for (; *ptr; ptr++) {
3683 trace_seq_putc(s, '\n');
3686 trace_seq_putc(s, '\t');
3689 trace_seq_putc(s, '\r');
3692 trace_seq_putc(s, '\\');
3695 trace_seq_putc(s, *ptr);
3699 } else if (*ptr == '%') {
3707 trace_seq_putc(s, '%');
3710 /* FIXME: need to handle properly */
3722 /* The argument is the length. */
3724 die("no argument match");
3725 len_arg = eval_num_arg(data, size, event, arg);
3735 if (pevent->long_size == 4)
3740 if (*(ptr+1) == 'F' ||
3744 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
3745 print_mac_arg(s, *(ptr+1), data, size, event, arg);
3757 die("no argument match");
3759 len = ((unsigned long)ptr + 1) -
3760 (unsigned long)saveptr;
3762 /* should never happen */
3766 memcpy(format, saveptr, len);
3769 val = eval_num_arg(data, size, event, arg);
3773 func = find_func(pevent, val);
3775 trace_seq_puts(s, func->func);
3776 if (show_func == 'F')
3783 if (pevent->long_size == 8 && ls) {
3787 /* make %l into %ll */
3788 p = strchr(format, 'l');
3790 memmove(p, p+1, strlen(p)+1);
3791 else if (strcmp(format, "%p") == 0)
3792 strcpy(format, "0x%llx");
3797 trace_seq_printf(s, format, len_arg, (char)val);
3799 trace_seq_printf(s, format, (char)val);
3803 trace_seq_printf(s, format, len_arg, (short)val);
3805 trace_seq_printf(s, format, (short)val);
3809 trace_seq_printf(s, format, len_arg, (int)val);
3811 trace_seq_printf(s, format, (int)val);
3815 trace_seq_printf(s, format, len_arg, (long)val);
3817 trace_seq_printf(s, format, (long)val);
3821 trace_seq_printf(s, format, len_arg,
3824 trace_seq_printf(s, format, (long long)val);
3827 die("bad count (%d)", ls);
3832 die("no matching argument");
3834 len = ((unsigned long)ptr + 1) -
3835 (unsigned long)saveptr;
3837 /* should never happen */
3841 memcpy(format, saveptr, len);
3845 print_str_arg(s, data, size, event,
3846 format, len_arg, arg);
3850 trace_seq_printf(s, ">%c<", *ptr);
3854 trace_seq_putc(s, *ptr);
3864 * pevent_data_lat_fmt - parse the data for the latency format
3865 * @pevent: a handle to the pevent
3866 * @s: the trace_seq to write to
3867 * @data: the raw data to read from
3868 * @size: currently unused.
3870 * This parses out the Latency format (interrupts disabled,
3871 * need rescheduling, in hard/soft interrupt, preempt count
3872 * and lock depth) and places it into the trace_seq.
3874 void pevent_data_lat_fmt(struct pevent *pevent,
3875 struct trace_seq *s, struct record *record)
3877 static int check_lock_depth = 1;
3878 static int lock_depth_exists;
3879 unsigned int lat_flags;
3884 void *data = record->data;
3886 lat_flags = parse_common_flags(pevent, data);
3887 pc = parse_common_pc(pevent, data);
3888 /* lock_depth may not always exist */
3889 if (check_lock_depth) {
3890 struct format_field *field;
3891 struct event_format *event;
3893 check_lock_depth = 0;
3894 event = pevent->events[0];
3895 field = pevent_find_common_field(event, "common_lock_depth");
3897 lock_depth_exists = 1;
3899 if (lock_depth_exists)
3900 lock_depth = parse_common_lock_depth(pevent, data);
3902 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
3903 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
3905 trace_seq_printf(s, "%c%c%c",
3906 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
3907 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
3909 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
3911 (hardirq && softirq) ? 'H' :
3912 hardirq ? 'h' : softirq ? 's' : '.');
3915 trace_seq_printf(s, "%x", pc);
3917 trace_seq_putc(s, '.');
3919 if (lock_depth_exists) {
3921 trace_seq_putc(s, '.');
3923 trace_seq_printf(s, "%d", lock_depth);
3926 trace_seq_terminate(s);
3930 * pevent_data_type - parse out the given event type
3931 * @pevent: a handle to the pevent
3932 * @rec: the record to read from
3934 * This returns the event id from the @rec.
3936 int pevent_data_type(struct pevent *pevent, struct record *rec)
3938 return trace_parse_common_type(pevent, rec->data);
3942 * pevent_data_event_from_type - find the event by a given type
3943 * @pevent: a handle to the pevent
3944 * @type: the type of the event.
3946 * This returns the event form a given @type;
3948 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
3950 return pevent_find_event(pevent, type);
3954 * pevent_data_pid - parse the PID from raw data
3955 * @pevent: a handle to the pevent
3956 * @rec: the record to parse
3958 * This returns the PID from a raw data.
3960 int pevent_data_pid(struct pevent *pevent, struct record *rec)
3962 return parse_common_pid(pevent, rec->data);
3966 * pevent_data_comm_from_pid - return the command line from PID
3967 * @pevent: a handle to the pevent
3968 * @pid: the PID of the task to search for
3970 * This returns a pointer to the command line that has the given
3973 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
3977 comm = find_cmdline(pevent, pid);
3982 * pevent_data_comm_from_pid - parse the data into the print format
3983 * @s: the trace_seq to write to
3984 * @event: the handle to the event
3985 * @cpu: the cpu the event was recorded on
3986 * @data: the raw data
3987 * @size: the size of the raw data
3988 * @nsecs: the timestamp of the event
3990 * This parses the raw @data using the given @event information and
3991 * writes the print format into the trace_seq.
3993 void pevent_event_info(struct trace_seq *s, struct event_format *event,
3994 struct record *record)
3996 int print_pretty = 1;
3998 if (event->pevent->print_raw)
3999 print_event_fields(s, record->data, record->size, event);
4003 print_pretty = event->handler(s, record, event,
4007 pretty_print(s, record->data, record->size, event);
4010 trace_seq_terminate(s);
4013 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
4014 struct record *record)
4016 static char *spaces = " "; /* 20 spaces */
4017 struct event_format *event;
4019 unsigned long usecs;
4020 unsigned long nsecs;
4022 void *data = record->data;
4028 secs = record->ts / NSECS_PER_SEC;
4029 nsecs = record->ts - secs * NSECS_PER_SEC;
4031 if (record->size < 0) {
4032 do_warning("ug! negative record size %d", record->size);
4036 type = trace_parse_common_type(pevent, data);
4038 event = pevent_find_event(pevent, type);
4040 do_warning("ug! no event found for type %d", type);
4044 pid = parse_common_pid(pevent, data);
4045 comm = find_cmdline(pevent, pid);
4047 if (pevent->latency_format) {
4048 trace_seq_printf(s, "%8.8s-%-5d %3d",
4049 comm, pid, record->cpu);
4050 pevent_data_lat_fmt(pevent, s, record);
4052 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
4054 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
4058 usecs = (nsecs + 500) / NSECS_PER_USEC;
4062 trace_seq_printf(s, " %5lu.%0*lu: %s: ", secs, p, usecs, event->name);
4064 /* Space out the event names evenly. */
4065 len = strlen(event->name);
4067 trace_seq_printf(s, "%.*s", 20 - len, spaces);
4069 pevent_event_info(s, event, record);
4072 static int events_id_cmp(const void *a, const void *b)
4074 struct event_format * const * ea = a;
4075 struct event_format * const * eb = b;
4077 if ((*ea)->id < (*eb)->id)
4080 if ((*ea)->id > (*eb)->id)
4086 static int events_name_cmp(const void *a, const void *b)
4088 struct event_format * const * ea = a;
4089 struct event_format * const * eb = b;
4092 res = strcmp((*ea)->name, (*eb)->name);
4096 res = strcmp((*ea)->system, (*eb)->system);
4100 return events_id_cmp(a, b);
4103 static int events_system_cmp(const void *a, const void *b)
4105 struct event_format * const * ea = a;
4106 struct event_format * const * eb = b;
4109 res = strcmp((*ea)->system, (*eb)->system);
4113 res = strcmp((*ea)->name, (*eb)->name);
4117 return events_id_cmp(a, b);
4120 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
4122 struct event_format **events;
4123 int (*sort)(const void *a, const void *b);
4125 events = pevent->sort_events;
4127 if (events && pevent->last_type == sort_type)
4131 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
4135 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
4136 events[pevent->nr_events] = NULL;
4138 pevent->sort_events = events;
4140 /* the internal events are sorted by id */
4141 if (sort_type == EVENT_SORT_ID) {
4142 pevent->last_type = sort_type;
4147 switch (sort_type) {
4149 sort = events_id_cmp;
4151 case EVENT_SORT_NAME:
4152 sort = events_name_cmp;
4154 case EVENT_SORT_SYSTEM:
4155 sort = events_system_cmp;
4161 qsort(events, pevent->nr_events, sizeof(*events), sort);
4162 pevent->last_type = sort_type;
4167 static struct format_field **
4168 get_event_fields(const char *type, const char *name,
4169 int count, struct format_field *list)
4171 struct format_field **fields;
4172 struct format_field *field;
4175 fields = malloc_or_die(sizeof(*fields) * (count + 1));
4176 for (field = list; field; field = field->next) {
4177 fields[i++] = field;
4178 if (i == count + 1) {
4179 do_warning("event %s has more %s fields than specified",
4187 do_warning("event %s has less %s fields than specified",
4196 * pevent_event_common_fields - return a list of common fields for an event
4197 * @event: the event to return the common fields of.
4199 * Returns an allocated array of fields. The last item in the array is NULL.
4200 * The array must be freed with free().
4202 struct format_field **pevent_event_common_fields(struct event_format *event)
4204 return get_event_fields("common", event->name,
4205 event->format.nr_common,
4206 event->format.common_fields);
4210 * pevent_event_fields - return a list of event specific fields for an event
4211 * @event: the event to return the 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_fields(struct event_format *event)
4218 return get_event_fields("event", event->name,
4219 event->format.nr_fields,
4220 event->format.fields);
4223 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
4225 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
4227 trace_seq_puts(s, ", ");
4228 print_fields(s, field->next);
4233 static void print_args(struct print_arg *args)
4235 int print_paren = 1;
4238 switch (args->type) {
4243 printf("%s", args->atom.atom);
4246 printf("REC->%s", args->field.name);
4249 printf("__print_flags(");
4250 print_args(args->flags.field);
4251 printf(", %s, ", args->flags.delim);
4253 print_fields(&s, args->flags.flags);
4254 trace_seq_do_printf(&s);
4255 trace_seq_destroy(&s);
4259 printf("__print_symbolic(");
4260 print_args(args->symbol.field);
4263 print_fields(&s, args->symbol.symbols);
4264 trace_seq_do_printf(&s);
4265 trace_seq_destroy(&s);
4270 printf("__get_str(%s)", args->string.string);
4273 printf("(%s)", args->typecast.type);
4274 print_args(args->typecast.item);
4277 if (strcmp(args->op.op, ":") == 0)
4281 print_args(args->op.left);
4282 printf(" %s ", args->op.op);
4283 print_args(args->op.right);
4288 /* we should warn... */
4293 print_args(args->next);
4297 static void parse_header_field(const char *field,
4298 int *offset, int *size, int mandatory)
4300 unsigned long long save_input_buf_ptr;
4301 unsigned long long save_input_buf_siz;
4305 save_input_buf_ptr = input_buf_ptr;
4306 save_input_buf_siz = input_buf_siz;
4308 if (read_expected(EVENT_ITEM, "field") < 0)
4310 if (read_expected(EVENT_OP, ":") < 0)
4314 if (read_expect_type(EVENT_ITEM, &token) < 0)
4319 * If this is not a mandatory field, then test it first.
4322 if (read_expected(EVENT_ITEM, field) < 0)
4325 if (read_expect_type(EVENT_ITEM, &token) < 0)
4327 if (strcmp(token, field) != 0)
4332 if (read_expected(EVENT_OP, ";") < 0)
4334 if (read_expected(EVENT_ITEM, "offset") < 0)
4336 if (read_expected(EVENT_OP, ":") < 0)
4338 if (read_expect_type(EVENT_ITEM, &token) < 0)
4340 *offset = atoi(token);
4342 if (read_expected(EVENT_OP, ";") < 0)
4344 if (read_expected(EVENT_ITEM, "size") < 0)
4346 if (read_expected(EVENT_OP, ":") < 0)
4348 if (read_expect_type(EVENT_ITEM, &token) < 0)
4350 *size = atoi(token);
4352 if (read_expected(EVENT_OP, ";") < 0)
4354 type = read_token(&token);
4355 if (type != EVENT_NEWLINE) {
4356 /* newer versions of the kernel have a "signed" type */
4357 if (type != EVENT_ITEM)
4360 if (strcmp(token, "signed") != 0)
4365 if (read_expected(EVENT_OP, ":") < 0)
4368 if (read_expect_type(EVENT_ITEM, &token))
4372 if (read_expected(EVENT_OP, ";") < 0)
4375 if (read_expect_type(EVENT_NEWLINE, &token))
4383 input_buf_ptr = save_input_buf_ptr;
4384 input_buf_siz = save_input_buf_siz;
4391 * pevent_parse_header_page - parse the data stored in the header page
4392 * @pevent: the handle to the pevent
4393 * @buf: the buffer storing the header page format string
4394 * @size: the size of @buf
4395 * @long_size: the long size to use if there is no header
4397 * This parses the header page format for information on the
4398 * ring buffer used. The @buf should be copied from
4400 * /sys/kernel/debug/tracing/events/header_page
4402 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
4409 * Old kernels did not have header page info.
4410 * Sorry but we just use what we find here in user space.
4412 pevent->header_page_ts_size = sizeof(long long);
4413 pevent->header_page_size_size = long_size;
4414 pevent->header_page_data_offset = sizeof(long long) + long_size;
4415 pevent->old_format = 1;
4418 init_input_buf(buf, size);
4420 parse_header_field("timestamp", &pevent->header_page_ts_offset,
4421 &pevent->header_page_ts_size, 1);
4422 parse_header_field("commit", &pevent->header_page_size_offset,
4423 &pevent->header_page_size_size, 1);
4424 parse_header_field("overwrite", &pevent->header_page_overwrite,
4426 parse_header_field("data", &pevent->header_page_data_offset,
4427 &pevent->header_page_data_size, 1);
4432 static int event_matches(struct event_format *event,
4433 int id, const char *sys_name,
4434 const char *event_name)
4436 if (id >= 0 && id != event->id)
4439 if (event_name && (strcmp(event_name, event->name) != 0))
4442 if (sys_name && (strcmp(sys_name, event->system) != 0))
4448 static void free_handler(struct event_handler *handle)
4450 free((void *)handle->sys_name);
4451 free((void *)handle->event_name);
4455 static int find_event_handle(struct pevent *pevent, struct event_format *event)
4457 struct event_handler *handle, **next;
4459 for (next = &pevent->handlers; *next;
4460 next = &(*next)->next) {
4462 if (event_matches(event, handle->id,
4464 handle->event_name))
4471 pr_stat("overriding event (%d) %s:%s with new print handler",
4472 event->id, event->system, event->name);
4474 event->handler = handle->func;
4475 event->context = handle->context;
4477 *next = handle->next;
4478 free_handler(handle);
4484 * pevent_parse_event - parse the event format
4485 * @pevent: the handle to the pevent
4486 * @buf: the buffer storing the event format string
4487 * @size: the size of @buf
4488 * @sys: the system the event belongs to
4490 * This parses the event format and creates an event structure
4491 * to quickly parse raw data for a given event.
4493 * These files currently come from:
4495 * /sys/kernel/debug/tracing/events/.../.../format
4497 int pevent_parse_event(struct pevent *pevent,
4498 const char *buf, unsigned long size,
4501 struct event_format *event;
4504 init_input_buf(buf, size);
4506 event = alloc_event();
4510 event->name = event_read_name();
4517 if (strcmp(sys, "ftrace") == 0) {
4519 event->flags |= EVENT_FL_ISFTRACE;
4521 if (strcmp(event->name, "bprint") == 0)
4522 event->flags |= EVENT_FL_ISBPRINT;
4525 event->id = event_read_id();
4527 die("failed to read event id");
4529 event->system = strdup(sys);
4531 /* Add pevent to event so that it can be referenced */
4532 event->pevent = pevent;
4534 ret = event_read_format(event);
4536 do_warning("failed to read event format for %s", event->name);
4541 * If the event has an override, don't print warnings if the event
4542 * print format fails to parse.
4544 if (find_event_handle(pevent, event))
4547 ret = event_read_print(event);
4549 do_warning("failed to read event print fmt for %s",
4556 add_event(pevent, event);
4558 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
4559 struct format_field *field;
4560 struct print_arg *arg, **list;
4562 /* old ftrace had no args */
4564 list = &event->print_fmt.args;
4565 for (field = event->format.fields; field; field = field->next) {
4569 arg->type = PRINT_FIELD;
4570 arg->field.name = strdup(field->name);
4571 arg->field.field = field;
4576 #define PRINT_ARGS 0
4577 if (PRINT_ARGS && event->print_fmt.args)
4578 print_args(event->print_fmt.args);
4583 event->flags |= EVENT_FL_FAILED;
4584 /* still add it even if it failed */
4585 add_event(pevent, event);
4589 int get_field_val(struct trace_seq *s, struct format_field *field,
4590 const char *name, struct record *record,
4591 unsigned long long *val, int err)
4595 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4599 if (pevent_read_number_field(field, record->data, val)) {
4601 trace_seq_printf(s, " %s=INVALID", name);
4609 * pevent_get_field_raw - return the raw pointer into the data field
4610 * @s: The seq to print to on error
4611 * @event: the event that the field is for
4612 * @name: The name of the field
4613 * @record: The record with the field name.
4614 * @len: place to store the field length.
4615 * @err: print default error if failed.
4617 * Returns a pointer into record->data of the field and places
4618 * the length of the field in @len.
4620 * On failure, it returns NULL.
4622 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
4623 const char *name, struct record *record,
4626 struct format_field *field;
4627 void *data = record->data;
4634 field = pevent_find_field(event, name);
4638 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
4642 /* Allow @len to be NULL */
4646 offset = field->offset;
4647 if (field->flags & FIELD_IS_DYNAMIC) {
4648 offset = pevent_read_number(event->pevent,
4649 data + offset, field->size);
4650 *len = offset >> 16;
4655 return data + offset;
4659 * pevent_get_field_val - find a field and return its value
4660 * @s: The seq to print to on error
4661 * @event: the event that the field is for
4662 * @name: The name of the field
4663 * @record: The record with the field name.
4664 * @val: place to store the value of the field.
4665 * @err: print default error if failed.
4667 * Returns 0 on success -1 on field not found.
4669 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
4670 const char *name, struct record *record,
4671 unsigned long long *val, int err)
4673 struct format_field *field;
4678 field = pevent_find_field(event, name);
4680 return get_field_val(s, field, name, record, val, err);
4684 * pevent_get_common_field_val - find a common field and return its value
4685 * @s: The seq to print to on error
4686 * @event: the event that the field is for
4687 * @name: The name of the field
4688 * @record: The record with the field name.
4689 * @val: place to store the value of the field.
4690 * @err: print default error if failed.
4692 * Returns 0 on success -1 on field not found.
4694 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
4695 const char *name, struct record *record,
4696 unsigned long long *val, int err)
4698 struct format_field *field;
4703 field = pevent_find_common_field(event, name);
4705 return get_field_val(s, field, name, record, val, err);
4709 * pevent_get_any_field_val - find a any field and return its value
4710 * @s: The seq to print to on error
4711 * @event: the event that the field is for
4712 * @name: The name of the field
4713 * @record: The record with the field name.
4714 * @val: place to store the value of the field.
4715 * @err: print default error if failed.
4717 * Returns 0 on success -1 on field not found.
4719 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
4720 const char *name, struct record *record,
4721 unsigned long long *val, int err)
4723 struct format_field *field;
4728 field = pevent_find_any_field(event, name);
4730 return get_field_val(s, field, name, record, val, err);
4734 * pevent_print_num_field - print a field and a format
4735 * @s: The seq to print to
4736 * @fmt: The printf format to print the field with.
4737 * @event: the event that the field is for
4738 * @name: The name of the field
4739 * @record: The record with the field name.
4740 * @err: print default error if failed.
4742 * Returns: 0 on success, -1 field not fould, or 1 if buffer is full.
4744 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
4745 struct event_format *event, const char *name,
4746 struct record *record, int err)
4748 struct format_field *field = pevent_find_field(event, name);
4749 unsigned long long val;
4754 if (pevent_read_number_field(field, record->data, &val))
4757 return trace_seq_printf(s, fmt, val);
4761 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
4765 static void free_func_handle(struct pevent_function_handler *func)
4767 struct pevent_func_params *params;
4771 while (func->params) {
4772 params = func->params;
4773 func->params = params->next;
4781 * pevent_register_print_function - register a helper function
4782 * @pevent: the handle to the pevent
4783 * @func: the function to process the helper function
4784 * @name: the name of the helper function
4785 * @parameters: A list of enum pevent_func_arg_type
4787 * Some events may have helper functions in the print format arguments.
4788 * This allows a plugin to dynmically create a way to process one
4789 * of these functions.
4791 * The @parameters is a variable list of pevent_func_arg_type enums that
4792 * must end with PEVENT_FUNC_ARG_VOID.
4794 int pevent_register_print_function(struct pevent *pevent,
4795 pevent_func_handler func,
4796 enum pevent_func_arg_type ret_type,
4799 struct pevent_function_handler *func_handle;
4800 struct pevent_func_params **next_param;
4801 struct pevent_func_params *param;
4802 enum pevent_func_arg_type type;
4805 func_handle = find_func_handler(pevent, name);
4808 * This is most like caused by the users own
4809 * plugins updating the function. This overrides the
4812 pr_stat("override of function helper '%s'", name);
4813 remove_func_handler(pevent, name);
4816 func_handle = malloc_or_die(sizeof(*func_handle));
4817 memset(func_handle, 0, sizeof(*func_handle));
4819 func_handle->ret_type = ret_type;
4820 func_handle->name = strdup(name);
4821 func_handle->func = func;
4822 if (!func_handle->name)
4823 die("Failed to allocate function name");
4825 next_param = &(func_handle->params);
4828 type = va_arg(ap, enum pevent_func_arg_type);
4829 if (type == PEVENT_FUNC_ARG_VOID)
4832 if (type < 0 || type >= PEVENT_FUNC_ARG_MAX_TYPES) {
4833 warning("Invalid argument type %d", type);
4837 param = malloc_or_die(sizeof(*param));
4841 *next_param = param;
4842 next_param = &(param->next);
4844 func_handle->nr_args++;
4848 func_handle->next = pevent->func_handlers;
4849 pevent->func_handlers = func_handle;
4854 free_func_handle(func_handle);
4859 * pevent_register_event_handle - register a way to parse an event
4860 * @pevent: the handle to the pevent
4861 * @id: the id of the event to register
4862 * @sys_name: the system name the event belongs to
4863 * @event_name: the name of the event
4864 * @func: the function to call to parse the event information
4866 * This function allows a developer to override the parsing of
4867 * a given event. If for some reason the default print format
4868 * is not sufficient, this function will register a function
4869 * for an event to be used to parse the data instead.
4871 * If @id is >= 0, then it is used to find the event.
4872 * else @sys_name and @event_name are used.
4874 int pevent_register_event_handler(struct pevent *pevent,
4875 int id, char *sys_name, char *event_name,
4876 pevent_event_handler_func func,
4879 struct event_format *event;
4880 struct event_handler *handle;
4884 event = pevent_find_event(pevent, id);
4887 if (event_name && (strcmp(event_name, event->name) != 0))
4889 if (sys_name && (strcmp(sys_name, event->system) != 0))
4892 event = pevent_find_event_by_name(pevent, sys_name, event_name);
4897 pr_stat("overriding event (%d) %s:%s with new print handler",
4898 event->id, event->system, event->name);
4900 event->handler = func;
4901 event->context = context;
4905 /* Save for later use. */
4906 handle = malloc_or_die(sizeof(*handle));
4907 memset(handle, 0, sizeof(handle));
4910 handle->event_name = strdup(event_name);
4912 handle->sys_name = strdup(sys_name);
4914 handle->func = func;
4915 handle->next = pevent->handlers;
4916 pevent->handlers = handle;
4917 handle->context = context;
4923 * pevent_alloc - create a pevent handle
4925 struct pevent *pevent_alloc(void)
4927 struct pevent *pevent;
4929 pevent = malloc(sizeof(*pevent));
4932 memset(pevent, 0, sizeof(*pevent));
4933 pevent->ref_count = 1;
4938 void pevent_ref(struct pevent *pevent)
4940 pevent->ref_count++;
4943 static void free_format_fields(struct format_field *field)
4945 struct format_field *next;
4956 static void free_formats(struct format *format)
4958 free_format_fields(format->common_fields);
4959 free_format_fields(format->fields);
4962 static void free_event(struct event_format *event)
4965 free(event->system);
4967 free_formats(&event->format);
4969 free(event->print_fmt.format);
4970 free_args(event->print_fmt.args);
4976 * pevent_free - free a pevent handle
4977 * @pevent: the pevent handle to free
4979 void pevent_free(struct pevent *pevent)
4981 struct cmdline_list *cmdlist, *cmdnext;
4982 struct func_list *funclist, *funcnext;
4983 struct printk_list *printklist, *printknext;
4984 struct pevent_function_handler *func_handler;
4985 struct event_handler *handle;
4991 cmdlist = pevent->cmdlist;
4992 funclist = pevent->funclist;
4993 printklist = pevent->printklist;
4995 pevent->ref_count--;
4996 if (pevent->ref_count)
4999 if (pevent->cmdlines) {
5000 for (i = 0; i < pevent->cmdline_count; i++)
5001 free(pevent->cmdlines[i].comm);
5002 free(pevent->cmdlines);
5006 cmdnext = cmdlist->next;
5007 free(cmdlist->comm);
5012 if (pevent->func_map) {
5013 for (i = 0; i < pevent->func_count; i++) {
5014 free(pevent->func_map[i].func);
5015 free(pevent->func_map[i].mod);
5017 free(pevent->func_map);
5021 funcnext = funclist->next;
5022 free(funclist->func);
5023 free(funclist->mod);
5025 funclist = funcnext;
5028 while (pevent->func_handlers) {
5029 func_handler = pevent->func_handlers;
5030 pevent->func_handlers = func_handler->next;
5031 free_func_handle(func_handler);
5034 if (pevent->printk_map) {
5035 for (i = 0; i < pevent->printk_count; i++)
5036 free(pevent->printk_map[i].printk);
5037 free(pevent->printk_map);
5040 while (printklist) {
5041 printknext = printklist->next;
5042 free(printklist->printk);
5044 printklist = printknext;
5047 for (i = 0; i < pevent->nr_events; i++)
5048 free_event(pevent->events[i]);
5050 while (pevent->handlers) {
5051 handle = pevent->handlers;
5052 pevent->handlers = handle->next;
5053 free_handler(handle);
5056 free(pevent->events);
5057 free(pevent->sort_events);
5062 void pevent_unref(struct pevent *pevent)
5064 pevent_free(pevent);