2 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
4 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation;
8 * version 2.1 of the License (not later!)
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this program; if not, see <http://www.gnu.org/licenses>
18 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20 * The parts for function graph printing was taken and modified from the
21 * Linux Kernel that were written by
22 * - Copyright (C) 2009 Frederic Weisbecker,
23 * Frederic Weisbecker gave his permission to relicense the code to
24 * the Lesser General Public License.
35 #include <netinet/ip6.h>
36 #include "event-parse.h"
37 #include "event-utils.h"
39 static const char *input_buf;
40 static unsigned long long input_buf_ptr;
41 static unsigned long long input_buf_siz;
43 static int is_flag_field;
44 static int is_symbolic_field;
46 static int show_warning = 1;
48 #define do_warning(fmt, ...) \
51 warning(fmt, ##__VA_ARGS__); \
54 #define do_warning_event(event, fmt, ...) \
60 warning("[%s:%s] " fmt, event->system, \
61 event->name, ##__VA_ARGS__); \
63 warning(fmt, ##__VA_ARGS__); \
66 static void init_input_buf(const char *buf, unsigned long long size)
73 const char *pevent_get_input_buf(void)
78 unsigned long long pevent_get_input_buf_ptr(void)
83 struct event_handler {
84 struct event_handler *next;
87 const char *event_name;
88 pevent_event_handler_func func;
92 struct pevent_func_params {
93 struct pevent_func_params *next;
94 enum pevent_func_arg_type type;
97 struct pevent_function_handler {
98 struct pevent_function_handler *next;
99 enum pevent_func_arg_type ret_type;
101 pevent_func_handler func;
102 struct pevent_func_params *params;
106 static unsigned long long
107 process_defined_func(struct trace_seq *s, void *data, int size,
108 struct event_format *event, struct print_arg *arg);
110 static void free_func_handle(struct pevent_function_handler *func);
113 * pevent_buffer_init - init buffer for parsing
114 * @buf: buffer to parse
115 * @size: the size of the buffer
117 * For use with pevent_read_token(), this initializes the internal
118 * buffer that pevent_read_token() will parse.
120 void pevent_buffer_init(const char *buf, unsigned long long size)
122 init_input_buf(buf, size);
125 void breakpoint(void)
131 struct print_arg *alloc_arg(void)
133 return calloc(1, sizeof(struct print_arg));
141 static int cmdline_cmp(const void *a, const void *b)
143 const struct cmdline *ca = a;
144 const struct cmdline *cb = b;
146 if (ca->pid < cb->pid)
148 if (ca->pid > cb->pid)
154 struct cmdline_list {
155 struct cmdline_list *next;
160 static int cmdline_init(struct pevent *pevent)
162 struct cmdline_list *cmdlist = pevent->cmdlist;
163 struct cmdline_list *item;
164 struct cmdline *cmdlines;
167 cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
173 cmdlines[i].pid = cmdlist->pid;
174 cmdlines[i].comm = cmdlist->comm;
177 cmdlist = cmdlist->next;
181 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
183 pevent->cmdlines = cmdlines;
184 pevent->cmdlist = NULL;
189 static const char *find_cmdline(struct pevent *pevent, int pid)
191 const struct cmdline *comm;
197 if (!pevent->cmdlines && cmdline_init(pevent))
198 return "<not enough memory for cmdlines!>";
202 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
203 sizeof(*pevent->cmdlines), cmdline_cmp);
211 * pevent_pid_is_registered - return if a pid has a cmdline registered
212 * @pevent: handle for the pevent
213 * @pid: The pid to check if it has a cmdline registered with.
215 * Returns 1 if the pid has a cmdline mapped to it
218 int pevent_pid_is_registered(struct pevent *pevent, int pid)
220 const struct cmdline *comm;
226 if (!pevent->cmdlines && cmdline_init(pevent))
231 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
232 sizeof(*pevent->cmdlines), cmdline_cmp);
240 * If the command lines have been converted to an array, then
241 * we must add this pid. This is much slower than when cmdlines
242 * are added before the array is initialized.
244 static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
246 struct cmdline *cmdlines = pevent->cmdlines;
247 const struct cmdline *cmdline;
253 /* avoid duplicates */
256 cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
257 sizeof(*pevent->cmdlines), cmdline_cmp);
263 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
269 cmdlines[pevent->cmdline_count].comm = strdup(comm);
270 if (!cmdlines[pevent->cmdline_count].comm) {
276 cmdlines[pevent->cmdline_count].pid = pid;
278 if (cmdlines[pevent->cmdline_count].comm)
279 pevent->cmdline_count++;
281 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
282 pevent->cmdlines = cmdlines;
288 * pevent_register_comm - register a pid / comm mapping
289 * @pevent: handle for the pevent
290 * @comm: the command line to register
291 * @pid: the pid to map the command line to
293 * This adds a mapping to search for command line names with
294 * a given pid. The comm is duplicated.
296 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
298 struct cmdline_list *item;
300 if (pevent->cmdlines)
301 return add_new_comm(pevent, comm, pid);
303 item = malloc(sizeof(*item));
308 item->comm = strdup(comm);
310 item->comm = strdup("<...>");
316 item->next = pevent->cmdlist;
318 pevent->cmdlist = item;
319 pevent->cmdline_count++;
324 int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock)
326 pevent->trace_clock = strdup(trace_clock);
327 if (!pevent->trace_clock) {
335 unsigned long long addr;
341 struct func_list *next;
342 unsigned long long addr;
347 static int func_cmp(const void *a, const void *b)
349 const struct func_map *fa = a;
350 const struct func_map *fb = b;
352 if (fa->addr < fb->addr)
354 if (fa->addr > fb->addr)
361 * We are searching for a record in between, not an exact
364 static int func_bcmp(const void *a, const void *b)
366 const struct func_map *fa = a;
367 const struct func_map *fb = b;
369 if ((fa->addr == fb->addr) ||
371 (fa->addr > fb->addr &&
372 fa->addr < (fb+1)->addr))
375 if (fa->addr < fb->addr)
381 static int func_map_init(struct pevent *pevent)
383 struct func_list *funclist;
384 struct func_list *item;
385 struct func_map *func_map;
388 func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
392 funclist = pevent->funclist;
396 func_map[i].func = funclist->func;
397 func_map[i].addr = funclist->addr;
398 func_map[i].mod = funclist->mod;
401 funclist = funclist->next;
405 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
408 * Add a special record at the end.
410 func_map[pevent->func_count].func = NULL;
411 func_map[pevent->func_count].addr = 0;
412 func_map[pevent->func_count].mod = NULL;
414 pevent->func_map = func_map;
415 pevent->funclist = NULL;
420 static struct func_map *
421 __find_func(struct pevent *pevent, unsigned long long addr)
423 struct func_map *func;
426 if (!pevent->func_map)
427 func_map_init(pevent);
431 func = bsearch(&key, pevent->func_map, pevent->func_count,
432 sizeof(*pevent->func_map), func_bcmp);
437 struct func_resolver {
438 pevent_func_resolver_t *func;
444 * pevent_set_function_resolver - set an alternative function resolver
445 * @pevent: handle for the pevent
446 * @resolver: function to be used
447 * @priv: resolver function private state.
449 * Some tools may have already a way to resolve kernel functions, allow them to
450 * keep using it instead of duplicating all the entries inside
453 int pevent_set_function_resolver(struct pevent *pevent,
454 pevent_func_resolver_t *func, void *priv)
456 struct func_resolver *resolver = malloc(sizeof(*resolver));
458 if (resolver == NULL)
461 resolver->func = func;
462 resolver->priv = priv;
464 free(pevent->func_resolver);
465 pevent->func_resolver = resolver;
471 * pevent_reset_function_resolver - reset alternative function resolver
472 * @pevent: handle for the pevent
474 * Stop using whatever alternative resolver was set, use the default
477 void pevent_reset_function_resolver(struct pevent *pevent)
479 free(pevent->func_resolver);
480 pevent->func_resolver = NULL;
483 static struct func_map *
484 find_func(struct pevent *pevent, unsigned long long addr)
486 struct func_map *map;
488 if (!pevent->func_resolver)
489 return __find_func(pevent, addr);
491 map = &pevent->func_resolver->map;
494 map->func = pevent->func_resolver->func(pevent->func_resolver->priv,
495 &map->addr, &map->mod);
496 if (map->func == NULL)
503 * pevent_find_function - find a function by a given address
504 * @pevent: handle for the pevent
505 * @addr: the address to find the function with
507 * Returns a pointer to the function stored that has the given
508 * address. Note, the address does not have to be exact, it
509 * will select the function that would contain the address.
511 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
513 struct func_map *map;
515 map = find_func(pevent, addr);
523 * pevent_find_function_address - find a function address by a given address
524 * @pevent: handle for the pevent
525 * @addr: the address to find the function with
527 * Returns the address the function starts at. This can be used in
528 * conjunction with pevent_find_function to print both the function
529 * name and the function offset.
532 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
534 struct func_map *map;
536 map = find_func(pevent, addr);
544 * pevent_register_function - register a function with a given address
545 * @pevent: handle for the pevent
546 * @function: the function name to register
547 * @addr: the address the function starts at
548 * @mod: the kernel module the function may be in (NULL for none)
550 * This registers a function name with an address and module.
551 * The @func passed in is duplicated.
553 int pevent_register_function(struct pevent *pevent, char *func,
554 unsigned long long addr, char *mod)
556 struct func_list *item = malloc(sizeof(*item));
561 item->next = pevent->funclist;
562 item->func = strdup(func);
567 item->mod = strdup(mod);
574 pevent->funclist = item;
575 pevent->func_count++;
589 * pevent_print_funcs - print out the stored functions
590 * @pevent: handle for the pevent
592 * This prints out the stored functions.
594 void pevent_print_funcs(struct pevent *pevent)
598 if (!pevent->func_map)
599 func_map_init(pevent);
601 for (i = 0; i < (int)pevent->func_count; i++) {
603 pevent->func_map[i].addr,
604 pevent->func_map[i].func);
605 if (pevent->func_map[i].mod)
606 printf(" [%s]\n", pevent->func_map[i].mod);
613 unsigned long long addr;
618 struct printk_list *next;
619 unsigned long long addr;
623 static int printk_cmp(const void *a, const void *b)
625 const struct printk_map *pa = a;
626 const struct printk_map *pb = b;
628 if (pa->addr < pb->addr)
630 if (pa->addr > pb->addr)
636 static int printk_map_init(struct pevent *pevent)
638 struct printk_list *printklist;
639 struct printk_list *item;
640 struct printk_map *printk_map;
643 printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
647 printklist = pevent->printklist;
651 printk_map[i].printk = printklist->printk;
652 printk_map[i].addr = printklist->addr;
655 printklist = printklist->next;
659 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
661 pevent->printk_map = printk_map;
662 pevent->printklist = NULL;
667 static struct printk_map *
668 find_printk(struct pevent *pevent, unsigned long long addr)
670 struct printk_map *printk;
671 struct printk_map key;
673 if (!pevent->printk_map && printk_map_init(pevent))
678 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
679 sizeof(*pevent->printk_map), printk_cmp);
685 * pevent_register_print_string - register a string by its address
686 * @pevent: handle for the pevent
687 * @fmt: the string format to register
688 * @addr: the address the string was located at
690 * This registers a string by the address it was stored in the kernel.
691 * The @fmt passed in is duplicated.
693 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
694 unsigned long long addr)
696 struct printk_list *item = malloc(sizeof(*item));
702 item->next = pevent->printklist;
705 /* Strip off quotes and '\n' from the end */
708 item->printk = strdup(fmt);
712 p = item->printk + strlen(item->printk) - 1;
717 if (strcmp(p, "\\n") == 0)
720 pevent->printklist = item;
721 pevent->printk_count++;
732 * pevent_print_printk - print out the stored strings
733 * @pevent: handle for the pevent
735 * This prints the string formats that were stored.
737 void pevent_print_printk(struct pevent *pevent)
741 if (!pevent->printk_map)
742 printk_map_init(pevent);
744 for (i = 0; i < (int)pevent->printk_count; i++) {
745 printf("%016llx %s\n",
746 pevent->printk_map[i].addr,
747 pevent->printk_map[i].printk);
751 static struct event_format *alloc_event(void)
753 return calloc(1, sizeof(struct event_format));
756 static int add_event(struct pevent *pevent, struct event_format *event)
759 struct event_format **events = realloc(pevent->events, sizeof(event) *
760 (pevent->nr_events + 1));
764 pevent->events = events;
766 for (i = 0; i < pevent->nr_events; i++) {
767 if (pevent->events[i]->id > event->id)
770 if (i < pevent->nr_events)
771 memmove(&pevent->events[i + 1],
773 sizeof(event) * (pevent->nr_events - i));
775 pevent->events[i] = event;
778 event->pevent = pevent;
783 static int event_item_type(enum event_type type)
786 case EVENT_ITEM ... EVENT_SQUOTE:
788 case EVENT_ERROR ... EVENT_DELIM:
794 static void free_flag_sym(struct print_flag_sym *fsym)
796 struct print_flag_sym *next;
807 static void free_arg(struct print_arg *arg)
809 struct print_arg *farg;
816 free(arg->atom.atom);
819 free(arg->field.name);
822 free_arg(arg->flags.field);
823 free(arg->flags.delim);
824 free_flag_sym(arg->flags.flags);
827 free_arg(arg->symbol.field);
828 free_flag_sym(arg->symbol.symbols);
831 free_arg(arg->hex.field);
832 free_arg(arg->hex.size);
834 case PRINT_INT_ARRAY:
835 free_arg(arg->int_array.field);
836 free_arg(arg->int_array.count);
837 free_arg(arg->int_array.el_size);
840 free(arg->typecast.type);
841 free_arg(arg->typecast.item);
845 free(arg->string.string);
848 free(arg->bitmask.bitmask);
850 case PRINT_DYNAMIC_ARRAY:
851 case PRINT_DYNAMIC_ARRAY_LEN:
852 free(arg->dynarray.index);
856 free_arg(arg->op.left);
857 free_arg(arg->op.right);
860 while (arg->func.args) {
861 farg = arg->func.args;
862 arg->func.args = farg->next;
875 static enum event_type get_type(int ch)
878 return EVENT_NEWLINE;
881 if (isalnum(ch) || ch == '_')
889 if (ch == '(' || ch == ')' || ch == ',')
895 static int __read_char(void)
897 if (input_buf_ptr >= input_buf_siz)
900 return input_buf[input_buf_ptr++];
903 static int __peek_char(void)
905 if (input_buf_ptr >= input_buf_siz)
908 return input_buf[input_buf_ptr];
912 * pevent_peek_char - peek at the next character that will be read
914 * Returns the next character read, or -1 if end of buffer.
916 int pevent_peek_char(void)
918 return __peek_char();
921 static int extend_token(char **tok, char *buf, int size)
923 char *newtok = realloc(*tok, size);
940 static enum event_type force_token(const char *str, char **tok);
942 static enum event_type __read_token(char **tok)
945 int ch, last_ch, quote_ch, next_ch;
948 enum event_type type;
958 if (type == EVENT_NONE)
966 if (asprintf(tok, "%c", ch) < 0)
974 next_ch = __peek_char();
975 if (next_ch == '>') {
976 buf[i++] = __read_char();
989 buf[i++] = __read_char();
1001 default: /* what should we do instead? */
1011 buf[i++] = __read_char();
1016 /* don't keep quotes */
1022 if (i == (BUFSIZ - 1)) {
1026 if (extend_token(tok, buf, tok_size) < 0)
1033 /* the '\' '\' will cancel itself */
1034 if (ch == '\\' && last_ch == '\\')
1036 } while (ch != quote_ch || last_ch == '\\');
1037 /* remove the last quote */
1041 * For strings (double quotes) check the next token.
1042 * If it is another string, concatinate the two.
1044 if (type == EVENT_DQUOTE) {
1045 unsigned long long save_input_buf_ptr = input_buf_ptr;
1049 } while (isspace(ch));
1052 input_buf_ptr = save_input_buf_ptr;
1057 case EVENT_ERROR ... EVENT_SPACE:
1063 while (get_type(__peek_char()) == type) {
1064 if (i == (BUFSIZ - 1)) {
1068 if (extend_token(tok, buf, tok_size) < 0)
1078 if (extend_token(tok, buf, tok_size + i + 1) < 0)
1081 if (type == EVENT_ITEM) {
1083 * Older versions of the kernel has a bug that
1084 * creates invalid symbols and will break the mac80211
1085 * parsing. This is a work around to that bug.
1087 * See Linux kernel commit:
1088 * 811cb50baf63461ce0bdb234927046131fc7fa8b
1090 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
1093 return force_token("\"\%s\" ", tok);
1094 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
1097 return force_token("\" sta:%pM\" ", tok);
1098 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
1101 return force_token("\" vif:%p(%d)\" ", tok);
1108 static enum event_type force_token(const char *str, char **tok)
1110 const char *save_input_buf;
1111 unsigned long long save_input_buf_ptr;
1112 unsigned long long save_input_buf_siz;
1113 enum event_type type;
1115 /* save off the current input pointers */
1116 save_input_buf = input_buf;
1117 save_input_buf_ptr = input_buf_ptr;
1118 save_input_buf_siz = input_buf_siz;
1120 init_input_buf(str, strlen(str));
1122 type = __read_token(tok);
1124 /* reset back to original token */
1125 input_buf = save_input_buf;
1126 input_buf_ptr = save_input_buf_ptr;
1127 input_buf_siz = save_input_buf_siz;
1132 static void free_token(char *tok)
1138 static enum event_type read_token(char **tok)
1140 enum event_type type;
1143 type = __read_token(tok);
1144 if (type != EVENT_SPACE)
1156 * pevent_read_token - access to utilites to use the pevent parser
1157 * @tok: The token to return
1159 * This will parse tokens from the string given by
1160 * pevent_init_data().
1162 * Returns the token type.
1164 enum event_type pevent_read_token(char **tok)
1166 return read_token(tok);
1170 * pevent_free_token - free a token returned by pevent_read_token
1171 * @token: the token to free
1173 void pevent_free_token(char *token)
1179 static enum event_type read_token_item(char **tok)
1181 enum event_type type;
1184 type = __read_token(tok);
1185 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1196 static int test_type(enum event_type type, enum event_type expect)
1198 if (type != expect) {
1199 do_warning("Error: expected type %d but read %d",
1206 static int test_type_token(enum event_type type, const char *token,
1207 enum event_type expect, const char *expect_tok)
1209 if (type != expect) {
1210 do_warning("Error: expected type %d but read %d",
1215 if (strcmp(token, expect_tok) != 0) {
1216 do_warning("Error: expected '%s' but read '%s'",
1223 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1225 enum event_type type;
1228 type = read_token(tok);
1230 type = read_token_item(tok);
1231 return test_type(type, expect);
1234 static int read_expect_type(enum event_type expect, char **tok)
1236 return __read_expect_type(expect, tok, 1);
1239 static int __read_expected(enum event_type expect, const char *str,
1242 enum event_type type;
1247 type = read_token(&token);
1249 type = read_token_item(&token);
1251 ret = test_type_token(type, token, expect, str);
1258 static int read_expected(enum event_type expect, const char *str)
1260 return __read_expected(expect, str, 1);
1263 static int read_expected_item(enum event_type expect, const char *str)
1265 return __read_expected(expect, str, 0);
1268 static char *event_read_name(void)
1272 if (read_expected(EVENT_ITEM, "name") < 0)
1275 if (read_expected(EVENT_OP, ":") < 0)
1278 if (read_expect_type(EVENT_ITEM, &token) < 0)
1288 static int event_read_id(void)
1293 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1296 if (read_expected(EVENT_OP, ":") < 0)
1299 if (read_expect_type(EVENT_ITEM, &token) < 0)
1302 id = strtoul(token, NULL, 0);
1311 static int field_is_string(struct format_field *field)
1313 if ((field->flags & FIELD_IS_ARRAY) &&
1314 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1315 strstr(field->type, "s8")))
1321 static int field_is_dynamic(struct format_field *field)
1323 if (strncmp(field->type, "__data_loc", 10) == 0)
1329 static int field_is_long(struct format_field *field)
1331 /* includes long long */
1332 if (strstr(field->type, "long"))
1338 static unsigned int type_size(const char *name)
1340 /* This covers all FIELD_IS_STRING types. */
1358 for (i = 0; table[i].type; i++) {
1359 if (!strcmp(table[i].type, name))
1360 return table[i].size;
1366 static int event_read_fields(struct event_format *event, struct format_field **fields)
1368 struct format_field *field = NULL;
1369 enum event_type type;
1375 unsigned int size_dynamic = 0;
1377 type = read_token(&token);
1378 if (type == EVENT_NEWLINE) {
1385 if (test_type_token(type, token, EVENT_ITEM, "field"))
1389 type = read_token(&token);
1391 * The ftrace fields may still use the "special" name.
1394 if (event->flags & EVENT_FL_ISFTRACE &&
1395 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1397 type = read_token(&token);
1400 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1404 if (read_expect_type(EVENT_ITEM, &token) < 0)
1409 field = calloc(1, sizeof(*field));
1413 field->event = event;
1415 /* read the rest of the type */
1417 type = read_token(&token);
1418 if (type == EVENT_ITEM ||
1419 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1421 * Some of the ftrace fields are broken and have
1422 * an illegal "." in them.
1424 (event->flags & EVENT_FL_ISFTRACE &&
1425 type == EVENT_OP && strcmp(token, ".") == 0)) {
1427 if (strcmp(token, "*") == 0)
1428 field->flags |= FIELD_IS_POINTER;
1432 new_type = realloc(field->type,
1433 strlen(field->type) +
1434 strlen(last_token) + 2);
1439 field->type = new_type;
1440 strcat(field->type, " ");
1441 strcat(field->type, last_token);
1444 field->type = last_token;
1453 do_warning_event(event, "%s: no type found", __func__);
1456 field->name = field->alias = last_token;
1458 if (test_type(type, EVENT_OP))
1461 if (strcmp(token, "[") == 0) {
1462 enum event_type last_type = type;
1463 char *brackets = token;
1467 field->flags |= FIELD_IS_ARRAY;
1469 type = read_token(&token);
1471 if (type == EVENT_ITEM)
1472 field->arraylen = strtoul(token, NULL, 0);
1474 field->arraylen = 0;
1476 while (strcmp(token, "]") != 0) {
1477 if (last_type == EVENT_ITEM &&
1484 new_brackets = realloc(brackets,
1486 strlen(token) + len);
1487 if (!new_brackets) {
1491 brackets = new_brackets;
1493 strcat(brackets, " ");
1494 strcat(brackets, token);
1495 /* We only care about the last token */
1496 field->arraylen = strtoul(token, NULL, 0);
1498 type = read_token(&token);
1499 if (type == EVENT_NONE) {
1500 do_warning_event(event, "failed to find token");
1507 new_brackets = realloc(brackets, strlen(brackets) + 2);
1508 if (!new_brackets) {
1512 brackets = new_brackets;
1513 strcat(brackets, "]");
1515 /* add brackets to type */
1517 type = read_token(&token);
1519 * If the next token is not an OP, then it is of
1520 * the format: type [] item;
1522 if (type == EVENT_ITEM) {
1524 new_type = realloc(field->type,
1525 strlen(field->type) +
1526 strlen(field->name) +
1527 strlen(brackets) + 2);
1532 field->type = new_type;
1533 strcat(field->type, " ");
1534 strcat(field->type, field->name);
1535 size_dynamic = type_size(field->name);
1536 free_token(field->name);
1537 strcat(field->type, brackets);
1538 field->name = field->alias = token;
1539 type = read_token(&token);
1542 new_type = realloc(field->type,
1543 strlen(field->type) +
1544 strlen(brackets) + 1);
1549 field->type = new_type;
1550 strcat(field->type, brackets);
1555 if (field_is_string(field))
1556 field->flags |= FIELD_IS_STRING;
1557 if (field_is_dynamic(field))
1558 field->flags |= FIELD_IS_DYNAMIC;
1559 if (field_is_long(field))
1560 field->flags |= FIELD_IS_LONG;
1562 if (test_type_token(type, token, EVENT_OP, ";"))
1566 if (read_expected(EVENT_ITEM, "offset") < 0)
1569 if (read_expected(EVENT_OP, ":") < 0)
1572 if (read_expect_type(EVENT_ITEM, &token))
1574 field->offset = strtoul(token, NULL, 0);
1577 if (read_expected(EVENT_OP, ";") < 0)
1580 if (read_expected(EVENT_ITEM, "size") < 0)
1583 if (read_expected(EVENT_OP, ":") < 0)
1586 if (read_expect_type(EVENT_ITEM, &token))
1588 field->size = strtoul(token, NULL, 0);
1591 if (read_expected(EVENT_OP, ";") < 0)
1594 type = read_token(&token);
1595 if (type != EVENT_NEWLINE) {
1596 /* newer versions of the kernel have a "signed" type */
1597 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1602 if (read_expected(EVENT_OP, ":") < 0)
1605 if (read_expect_type(EVENT_ITEM, &token))
1608 if (strtoul(token, NULL, 0))
1609 field->flags |= FIELD_IS_SIGNED;
1612 if (read_expected(EVENT_OP, ";") < 0)
1615 if (read_expect_type(EVENT_NEWLINE, &token))
1621 if (field->flags & FIELD_IS_ARRAY) {
1622 if (field->arraylen)
1623 field->elementsize = field->size / field->arraylen;
1624 else if (field->flags & FIELD_IS_DYNAMIC)
1625 field->elementsize = size_dynamic;
1626 else if (field->flags & FIELD_IS_STRING)
1627 field->elementsize = 1;
1628 else if (field->flags & FIELD_IS_LONG)
1629 field->elementsize = event->pevent ?
1630 event->pevent->long_size :
1633 field->elementsize = field->size;
1636 fields = &field->next;
1653 static int event_read_format(struct event_format *event)
1658 if (read_expected_item(EVENT_ITEM, "format") < 0)
1661 if (read_expected(EVENT_OP, ":") < 0)
1664 if (read_expect_type(EVENT_NEWLINE, &token))
1668 ret = event_read_fields(event, &event->format.common_fields);
1671 event->format.nr_common = ret;
1673 ret = event_read_fields(event, &event->format.fields);
1676 event->format.nr_fields = ret;
1685 static enum event_type
1686 process_arg_token(struct event_format *event, struct print_arg *arg,
1687 char **tok, enum event_type type);
1689 static enum event_type
1690 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1692 enum event_type type;
1695 type = read_token(&token);
1698 return process_arg_token(event, arg, tok, type);
1701 static enum event_type
1702 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1705 * For __print_symbolic() and __print_flags, we need to completely
1706 * evaluate the first argument, which defines what to print next.
1708 static enum event_type
1709 process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
1711 enum event_type type;
1713 type = process_arg(event, arg, tok);
1715 while (type == EVENT_OP) {
1716 type = process_op(event, arg, tok);
1722 static enum event_type
1723 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1725 struct print_arg *arg, *left, *right;
1726 enum event_type type;
1731 right = alloc_arg();
1733 if (!arg || !left || !right) {
1734 do_warning_event(event, "%s: not enough memory!", __func__);
1735 /* arg will be freed at out_free */
1741 arg->type = PRINT_OP;
1742 arg->op.left = left;
1743 arg->op.right = right;
1746 type = process_arg(event, left, &token);
1749 if (type == EVENT_ERROR)
1752 /* Handle other operations in the arguments */
1753 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1754 type = process_op(event, left, &token);
1758 if (test_type_token(type, token, EVENT_OP, ":"))
1763 type = process_arg(event, right, &token);
1765 top->op.right = arg;
1771 /* Top may point to itself */
1772 top->op.right = NULL;
1778 static enum event_type
1779 process_array(struct event_format *event, struct print_arg *top, char **tok)
1781 struct print_arg *arg;
1782 enum event_type type;
1787 do_warning_event(event, "%s: not enough memory!", __func__);
1788 /* '*tok' is set to top->op.op. No need to free. */
1794 type = process_arg(event, arg, &token);
1795 if (test_type_token(type, token, EVENT_OP, "]"))
1798 top->op.right = arg;
1801 type = read_token_item(&token);
1812 static int get_op_prio(char *op)
1826 /* '>>' and '<<' are 8 */
1830 /* '==' and '!=' are 10 */
1840 do_warning("unknown op '%c'", op[0]);
1844 if (strcmp(op, "++") == 0 ||
1845 strcmp(op, "--") == 0) {
1847 } else if (strcmp(op, ">>") == 0 ||
1848 strcmp(op, "<<") == 0) {
1850 } else if (strcmp(op, ">=") == 0 ||
1851 strcmp(op, "<=") == 0) {
1853 } else if (strcmp(op, "==") == 0 ||
1854 strcmp(op, "!=") == 0) {
1856 } else if (strcmp(op, "&&") == 0) {
1858 } else if (strcmp(op, "||") == 0) {
1861 do_warning("unknown op '%s'", op);
1867 static int set_op_prio(struct print_arg *arg)
1870 /* single ops are the greatest */
1871 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1874 arg->op.prio = get_op_prio(arg->op.op);
1876 return arg->op.prio;
1879 /* Note, *tok does not get freed, but will most likely be saved */
1880 static enum event_type
1881 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1883 struct print_arg *left, *right = NULL;
1884 enum event_type type;
1887 /* the op is passed in via tok */
1890 if (arg->type == PRINT_OP && !arg->op.left) {
1891 /* handle single op */
1893 do_warning_event(event, "bad op token %s", token);
1903 do_warning_event(event, "bad op token %s", token);
1908 /* make an empty left */
1913 left->type = PRINT_NULL;
1914 arg->op.left = left;
1916 right = alloc_arg();
1920 arg->op.right = right;
1922 /* do not free the token, it belongs to an op */
1924 type = process_arg(event, right, tok);
1926 } else if (strcmp(token, "?") == 0) {
1932 /* copy the top arg to the left */
1935 arg->type = PRINT_OP;
1937 arg->op.left = left;
1940 /* it will set arg->op.right */
1941 type = process_cond(event, arg, tok);
1943 } else if (strcmp(token, ">>") == 0 ||
1944 strcmp(token, "<<") == 0 ||
1945 strcmp(token, "&") == 0 ||
1946 strcmp(token, "|") == 0 ||
1947 strcmp(token, "&&") == 0 ||
1948 strcmp(token, "||") == 0 ||
1949 strcmp(token, "-") == 0 ||
1950 strcmp(token, "+") == 0 ||
1951 strcmp(token, "*") == 0 ||
1952 strcmp(token, "^") == 0 ||
1953 strcmp(token, "/") == 0 ||
1954 strcmp(token, "<") == 0 ||
1955 strcmp(token, ">") == 0 ||
1956 strcmp(token, "<=") == 0 ||
1957 strcmp(token, ">=") == 0 ||
1958 strcmp(token, "==") == 0 ||
1959 strcmp(token, "!=") == 0) {
1965 /* copy the top arg to the left */
1968 arg->type = PRINT_OP;
1970 arg->op.left = left;
1971 arg->op.right = NULL;
1973 if (set_op_prio(arg) == -1) {
1974 event->flags |= EVENT_FL_FAILED;
1975 /* arg->op.op (= token) will be freed at out_free */
1980 type = read_token_item(&token);
1983 /* could just be a type pointer */
1984 if ((strcmp(arg->op.op, "*") == 0) &&
1985 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1988 if (left->type != PRINT_ATOM) {
1989 do_warning_event(event, "bad pointer type");
1992 new_atom = realloc(left->atom.atom,
1993 strlen(left->atom.atom) + 3);
1997 left->atom.atom = new_atom;
1998 strcat(left->atom.atom, " *");
2006 right = alloc_arg();
2010 type = process_arg_token(event, right, tok, type);
2011 if (type == EVENT_ERROR) {
2013 /* token was freed in process_arg_token() via *tok */
2018 if (right->type == PRINT_OP &&
2019 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2020 struct print_arg tmp;
2022 /* rotate ops according to the priority */
2023 arg->op.right = right->op.left;
2029 arg->op.left = right;
2031 arg->op.right = right;
2034 } else if (strcmp(token, "[") == 0) {
2042 arg->type = PRINT_OP;
2044 arg->op.left = left;
2048 /* it will set arg->op.right */
2049 type = process_array(event, arg, tok);
2052 do_warning_event(event, "unknown op '%s'", token);
2053 event->flags |= EVENT_FL_FAILED;
2054 /* the arg is now the left side */
2058 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
2061 /* higher prios need to be closer to the root */
2062 prio = get_op_prio(*tok);
2064 if (prio > arg->op.prio)
2065 return process_op(event, arg, tok);
2067 return process_op(event, right, tok);
2073 do_warning_event(event, "%s: not enough memory!", __func__);
2080 static enum event_type
2081 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
2084 enum event_type type;
2088 if (read_expected(EVENT_OP, "->") < 0)
2091 if (read_expect_type(EVENT_ITEM, &token) < 0)
2095 arg->type = PRINT_FIELD;
2096 arg->field.name = field;
2098 if (is_flag_field) {
2099 arg->field.field = pevent_find_any_field(event, arg->field.name);
2100 arg->field.field->flags |= FIELD_IS_FLAG;
2102 } else if (is_symbolic_field) {
2103 arg->field.field = pevent_find_any_field(event, arg->field.name);
2104 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
2105 is_symbolic_field = 0;
2108 type = read_token(&token);
2120 static int alloc_and_process_delim(struct event_format *event, char *next_token,
2121 struct print_arg **print_arg)
2123 struct print_arg *field;
2124 enum event_type type;
2128 field = alloc_arg();
2130 do_warning_event(event, "%s: not enough memory!", __func__);
2135 type = process_arg(event, field, &token);
2137 if (test_type_token(type, token, EVENT_DELIM, next_token)) {
2141 goto out_free_token;
2152 static char *arg_eval (struct print_arg *arg);
2154 static unsigned long long
2155 eval_type_str(unsigned long long val, const char *type, int pointer)
2165 if (type[len-1] != '*') {
2166 do_warning("pointer expected with non pointer type");
2172 do_warning("%s: not enough memory!", __func__);
2175 memcpy(ref, type, len);
2177 /* chop off the " *" */
2180 val = eval_type_str(val, ref, 0);
2185 /* check if this is a pointer */
2186 if (type[len - 1] == '*')
2189 /* Try to figure out the arg size*/
2190 if (strncmp(type, "struct", 6) == 0)
2194 if (strcmp(type, "u8") == 0)
2197 if (strcmp(type, "u16") == 0)
2198 return val & 0xffff;
2200 if (strcmp(type, "u32") == 0)
2201 return val & 0xffffffff;
2203 if (strcmp(type, "u64") == 0 ||
2204 strcmp(type, "s64"))
2207 if (strcmp(type, "s8") == 0)
2208 return (unsigned long long)(char)val & 0xff;
2210 if (strcmp(type, "s16") == 0)
2211 return (unsigned long long)(short)val & 0xffff;
2213 if (strcmp(type, "s32") == 0)
2214 return (unsigned long long)(int)val & 0xffffffff;
2216 if (strncmp(type, "unsigned ", 9) == 0) {
2221 if (strcmp(type, "char") == 0) {
2223 return (unsigned long long)(char)val & 0xff;
2228 if (strcmp(type, "short") == 0) {
2230 return (unsigned long long)(short)val & 0xffff;
2232 return val & 0xffff;
2235 if (strcmp(type, "int") == 0) {
2237 return (unsigned long long)(int)val & 0xffffffff;
2239 return val & 0xffffffff;
2246 * Try to figure out the type.
2248 static unsigned long long
2249 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
2251 if (arg->type != PRINT_TYPE) {
2252 do_warning("expected type argument");
2256 return eval_type_str(val, arg->typecast.type, pointer);
2259 static int arg_num_eval(struct print_arg *arg, long long *val)
2261 long long left, right;
2264 switch (arg->type) {
2266 *val = strtoll(arg->atom.atom, NULL, 0);
2269 ret = arg_num_eval(arg->typecast.item, val);
2272 *val = eval_type(*val, arg, 0);
2275 switch (arg->op.op[0]) {
2277 ret = arg_num_eval(arg->op.left, &left);
2280 ret = arg_num_eval(arg->op.right, &right);
2284 *val = left || right;
2286 *val = left | right;
2289 ret = arg_num_eval(arg->op.left, &left);
2292 ret = arg_num_eval(arg->op.right, &right);
2296 *val = left && right;
2298 *val = left & right;
2301 ret = arg_num_eval(arg->op.left, &left);
2304 ret = arg_num_eval(arg->op.right, &right);
2307 switch (arg->op.op[1]) {
2309 *val = left < right;
2312 *val = left << right;
2315 *val = left <= right;
2318 do_warning("unknown op '%s'", arg->op.op);
2323 ret = arg_num_eval(arg->op.left, &left);
2326 ret = arg_num_eval(arg->op.right, &right);
2329 switch (arg->op.op[1]) {
2331 *val = left > right;
2334 *val = left >> right;
2337 *val = left >= right;
2340 do_warning("unknown op '%s'", arg->op.op);
2345 ret = arg_num_eval(arg->op.left, &left);
2348 ret = arg_num_eval(arg->op.right, &right);
2352 if (arg->op.op[1] != '=') {
2353 do_warning("unknown op '%s'", arg->op.op);
2356 *val = left == right;
2359 ret = arg_num_eval(arg->op.left, &left);
2362 ret = arg_num_eval(arg->op.right, &right);
2366 switch (arg->op.op[1]) {
2368 *val = left != right;
2371 do_warning("unknown op '%s'", arg->op.op);
2376 /* check for negative */
2377 if (arg->op.left->type == PRINT_NULL)
2380 ret = arg_num_eval(arg->op.left, &left);
2383 ret = arg_num_eval(arg->op.right, &right);
2386 *val = left - right;
2389 if (arg->op.left->type == PRINT_NULL)
2392 ret = arg_num_eval(arg->op.left, &left);
2395 ret = arg_num_eval(arg->op.right, &right);
2398 *val = left + right;
2401 do_warning("unknown op '%s'", arg->op.op);
2407 case PRINT_FIELD ... PRINT_SYMBOL:
2412 do_warning("invalid eval type %d", arg->type);
2419 static char *arg_eval (struct print_arg *arg)
2422 static char buf[20];
2424 switch (arg->type) {
2426 return arg->atom.atom;
2428 return arg_eval(arg->typecast.item);
2430 if (!arg_num_eval(arg, &val))
2432 sprintf(buf, "%lld", val);
2436 case PRINT_FIELD ... PRINT_SYMBOL:
2441 do_warning("invalid eval type %d", arg->type);
2448 static enum event_type
2449 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2451 enum event_type type;
2452 struct print_arg *arg = NULL;
2453 struct print_flag_sym *field;
2459 type = read_token_item(&token);
2460 if (test_type_token(type, token, EVENT_OP, "{"))
2468 type = process_arg(event, arg, &token);
2470 if (type == EVENT_OP)
2471 type = process_op(event, arg, &token);
2473 if (type == EVENT_ERROR)
2476 if (test_type_token(type, token, EVENT_DELIM, ","))
2479 field = calloc(1, sizeof(*field));
2483 value = arg_eval(arg);
2485 goto out_free_field;
2486 field->value = strdup(value);
2487 if (field->value == NULL)
2488 goto out_free_field;
2496 type = process_arg(event, arg, &token);
2497 if (test_type_token(type, token, EVENT_OP, "}"))
2498 goto out_free_field;
2500 value = arg_eval(arg);
2502 goto out_free_field;
2503 field->str = strdup(value);
2504 if (field->str == NULL)
2505 goto out_free_field;
2510 list = &field->next;
2513 type = read_token_item(&token);
2514 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2520 free_flag_sym(field);
2529 static enum event_type
2530 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2532 struct print_arg *field;
2533 enum event_type type;
2536 memset(arg, 0, sizeof(*arg));
2537 arg->type = PRINT_FLAGS;
2539 field = alloc_arg();
2541 do_warning_event(event, "%s: not enough memory!", __func__);
2545 type = process_field_arg(event, field, &token);
2547 /* Handle operations in the first argument */
2548 while (type == EVENT_OP)
2549 type = process_op(event, field, &token);
2551 if (test_type_token(type, token, EVENT_DELIM, ","))
2552 goto out_free_field;
2555 arg->flags.field = field;
2557 type = read_token_item(&token);
2558 if (event_item_type(type)) {
2559 arg->flags.delim = token;
2560 type = read_token_item(&token);
2563 if (test_type_token(type, token, EVENT_DELIM, ","))
2566 type = process_fields(event, &arg->flags.flags, &token);
2567 if (test_type_token(type, token, EVENT_DELIM, ")"))
2571 type = read_token_item(tok);
2582 static enum event_type
2583 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2585 struct print_arg *field;
2586 enum event_type type;
2589 memset(arg, 0, sizeof(*arg));
2590 arg->type = PRINT_SYMBOL;
2592 field = alloc_arg();
2594 do_warning_event(event, "%s: not enough memory!", __func__);
2598 type = process_field_arg(event, field, &token);
2600 if (test_type_token(type, token, EVENT_DELIM, ","))
2601 goto out_free_field;
2603 arg->symbol.field = field;
2605 type = process_fields(event, &arg->symbol.symbols, &token);
2606 if (test_type_token(type, token, EVENT_DELIM, ")"))
2610 type = read_token_item(tok);
2621 static enum event_type
2622 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2624 memset(arg, 0, sizeof(*arg));
2625 arg->type = PRINT_HEX;
2627 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2630 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2633 return read_token_item(tok);
2636 free_arg(arg->hex.field);
2642 static enum event_type
2643 process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
2645 memset(arg, 0, sizeof(*arg));
2646 arg->type = PRINT_INT_ARRAY;
2648 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2651 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2654 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2657 return read_token_item(tok);
2660 free_arg(arg->int_array.count);
2662 free_arg(arg->int_array.field);
2668 static enum event_type
2669 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2671 struct format_field *field;
2672 enum event_type type;
2675 memset(arg, 0, sizeof(*arg));
2676 arg->type = PRINT_DYNAMIC_ARRAY;
2679 * The item within the parenthesis is another field that holds
2680 * the index into where the array starts.
2682 type = read_token(&token);
2684 if (type != EVENT_ITEM)
2687 /* Find the field */
2689 field = pevent_find_field(event, token);
2693 arg->dynarray.field = field;
2694 arg->dynarray.index = 0;
2696 if (read_expected(EVENT_DELIM, ")") < 0)
2700 type = read_token_item(&token);
2702 if (type != EVENT_OP || strcmp(token, "[") != 0)
2708 do_warning_event(event, "%s: not enough memory!", __func__);
2713 type = process_arg(event, arg, &token);
2714 if (type == EVENT_ERROR)
2717 if (!test_type_token(type, token, EVENT_OP, "]"))
2721 type = read_token_item(tok);
2732 static enum event_type
2733 process_dynamic_array_len(struct event_format *event, struct print_arg *arg,
2736 struct format_field *field;
2737 enum event_type type;
2740 if (read_expect_type(EVENT_ITEM, &token) < 0)
2743 arg->type = PRINT_DYNAMIC_ARRAY_LEN;
2745 /* Find the field */
2746 field = pevent_find_field(event, token);
2750 arg->dynarray.field = field;
2751 arg->dynarray.index = 0;
2753 if (read_expected(EVENT_DELIM, ")") < 0)
2756 type = read_token(&token);
2768 static enum event_type
2769 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2771 struct print_arg *item_arg;
2772 enum event_type type;
2775 type = process_arg(event, arg, &token);
2777 if (type == EVENT_ERROR)
2780 if (type == EVENT_OP)
2781 type = process_op(event, arg, &token);
2783 if (type == EVENT_ERROR)
2786 if (test_type_token(type, token, EVENT_DELIM, ")"))
2790 type = read_token_item(&token);
2793 * If the next token is an item or another open paren, then
2794 * this was a typecast.
2796 if (event_item_type(type) ||
2797 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2799 /* make this a typecast and contine */
2801 /* prevous must be an atom */
2802 if (arg->type != PRINT_ATOM) {
2803 do_warning_event(event, "previous needed to be PRINT_ATOM");
2807 item_arg = alloc_arg();
2809 do_warning_event(event, "%s: not enough memory!",
2814 arg->type = PRINT_TYPE;
2815 arg->typecast.type = arg->atom.atom;
2816 arg->typecast.item = item_arg;
2817 type = process_arg_token(event, item_arg, &token, type);
2831 static enum event_type
2832 process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
2835 enum event_type type;
2838 if (read_expect_type(EVENT_ITEM, &token) < 0)
2841 arg->type = PRINT_STRING;
2842 arg->string.string = token;
2843 arg->string.offset = -1;
2845 if (read_expected(EVENT_DELIM, ")") < 0)
2848 type = read_token(&token);
2860 static enum event_type
2861 process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
2864 enum event_type type;
2867 if (read_expect_type(EVENT_ITEM, &token) < 0)
2870 arg->type = PRINT_BITMASK;
2871 arg->bitmask.bitmask = token;
2872 arg->bitmask.offset = -1;
2874 if (read_expected(EVENT_DELIM, ")") < 0)
2877 type = read_token(&token);
2889 static struct pevent_function_handler *
2890 find_func_handler(struct pevent *pevent, char *func_name)
2892 struct pevent_function_handler *func;
2897 for (func = pevent->func_handlers; func; func = func->next) {
2898 if (strcmp(func->name, func_name) == 0)
2905 static void remove_func_handler(struct pevent *pevent, char *func_name)
2907 struct pevent_function_handler *func;
2908 struct pevent_function_handler **next;
2910 next = &pevent->func_handlers;
2911 while ((func = *next)) {
2912 if (strcmp(func->name, func_name) == 0) {
2914 free_func_handle(func);
2921 static enum event_type
2922 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2923 struct print_arg *arg, char **tok)
2925 struct print_arg **next_arg;
2926 struct print_arg *farg;
2927 enum event_type type;
2931 arg->type = PRINT_FUNC;
2932 arg->func.func = func;
2936 next_arg = &(arg->func.args);
2937 for (i = 0; i < func->nr_args; i++) {
2940 do_warning_event(event, "%s: not enough memory!",
2945 type = process_arg(event, farg, &token);
2946 if (i < (func->nr_args - 1)) {
2947 if (type != EVENT_DELIM || strcmp(token, ",") != 0) {
2948 do_warning_event(event,
2949 "Error: function '%s()' expects %d arguments but event %s only uses %d",
2950 func->name, func->nr_args,
2951 event->name, i + 1);
2955 if (type != EVENT_DELIM || strcmp(token, ")") != 0) {
2956 do_warning_event(event,
2957 "Error: function '%s()' only expects %d arguments but event %s has more",
2958 func->name, func->nr_args, event->name);
2964 next_arg = &(farg->next);
2968 type = read_token(&token);
2979 static enum event_type
2980 process_function(struct event_format *event, struct print_arg *arg,
2981 char *token, char **tok)
2983 struct pevent_function_handler *func;
2985 if (strcmp(token, "__print_flags") == 0) {
2988 return process_flags(event, arg, tok);
2990 if (strcmp(token, "__print_symbolic") == 0) {
2992 is_symbolic_field = 1;
2993 return process_symbols(event, arg, tok);
2995 if (strcmp(token, "__print_hex") == 0) {
2997 return process_hex(event, arg, tok);
2999 if (strcmp(token, "__print_array") == 0) {
3001 return process_int_array(event, arg, tok);
3003 if (strcmp(token, "__get_str") == 0) {
3005 return process_str(event, arg, tok);
3007 if (strcmp(token, "__get_bitmask") == 0) {
3009 return process_bitmask(event, arg, tok);
3011 if (strcmp(token, "__get_dynamic_array") == 0) {
3013 return process_dynamic_array(event, arg, tok);
3015 if (strcmp(token, "__get_dynamic_array_len") == 0) {
3017 return process_dynamic_array_len(event, arg, tok);
3020 func = find_func_handler(event->pevent, token);
3023 return process_func_handler(event, func, arg, tok);
3026 do_warning_event(event, "function %s not defined", token);
3031 static enum event_type
3032 process_arg_token(struct event_format *event, struct print_arg *arg,
3033 char **tok, enum event_type type)
3042 if (strcmp(token, "REC") == 0) {
3044 type = process_entry(event, arg, &token);
3048 /* test the next token */
3049 type = read_token_item(&token);
3052 * If the next token is a parenthesis, then this
3055 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
3058 /* this will free atom. */
3059 type = process_function(event, arg, atom, &token);
3062 /* atoms can be more than one token long */
3063 while (type == EVENT_ITEM) {
3065 new_atom = realloc(atom,
3066 strlen(atom) + strlen(token) + 2);
3075 strcat(atom, token);
3077 type = read_token_item(&token);
3080 arg->type = PRINT_ATOM;
3081 arg->atom.atom = atom;
3086 arg->type = PRINT_ATOM;
3087 arg->atom.atom = token;
3088 type = read_token_item(&token);
3091 if (strcmp(token, "(") == 0) {
3093 type = process_paren(event, arg, &token);
3097 /* handle single ops */
3098 arg->type = PRINT_OP;
3100 arg->op.left = NULL;
3101 type = process_op(event, arg, &token);
3103 /* On error, the op is freed */
3104 if (type == EVENT_ERROR)
3107 /* return error type if errored */
3110 case EVENT_ERROR ... EVENT_NEWLINE:
3112 do_warning_event(event, "unexpected type %d", type);
3120 static int event_read_print_args(struct event_format *event, struct print_arg **list)
3122 enum event_type type = EVENT_ERROR;
3123 struct print_arg *arg;
3128 if (type == EVENT_NEWLINE) {
3129 type = read_token_item(&token);
3135 do_warning_event(event, "%s: not enough memory!",
3140 type = process_arg(event, arg, &token);
3142 if (type == EVENT_ERROR) {
3151 if (type == EVENT_OP) {
3152 type = process_op(event, arg, &token);
3154 if (type == EVENT_ERROR) {
3163 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
3170 } while (type != EVENT_NONE);
3172 if (type != EVENT_NONE && type != EVENT_ERROR)
3178 static int event_read_print(struct event_format *event)
3180 enum event_type type;
3184 if (read_expected_item(EVENT_ITEM, "print") < 0)
3187 if (read_expected(EVENT_ITEM, "fmt") < 0)
3190 if (read_expected(EVENT_OP, ":") < 0)
3193 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
3197 event->print_fmt.format = token;
3198 event->print_fmt.args = NULL;
3200 /* ok to have no arg */
3201 type = read_token_item(&token);
3203 if (type == EVENT_NONE)
3206 /* Handle concatenation of print lines */
3207 if (type == EVENT_DQUOTE) {
3210 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
3213 free_token(event->print_fmt.format);
3214 event->print_fmt.format = NULL;
3219 if (test_type_token(type, token, EVENT_DELIM, ","))
3224 ret = event_read_print_args(event, &event->print_fmt.args);
3236 * pevent_find_common_field - return a common field by event
3237 * @event: handle for the event
3238 * @name: the name of the common field to return
3240 * Returns a common field from the event by the given @name.
3241 * This only searchs the common fields and not all field.
3243 struct format_field *
3244 pevent_find_common_field(struct event_format *event, const char *name)
3246 struct format_field *format;
3248 for (format = event->format.common_fields;
3249 format; format = format->next) {
3250 if (strcmp(format->name, name) == 0)
3258 * pevent_find_field - find a non-common field
3259 * @event: handle for the event
3260 * @name: the name of the non-common field
3262 * Returns a non-common field by the given @name.
3263 * This does not search common fields.
3265 struct format_field *
3266 pevent_find_field(struct event_format *event, const char *name)
3268 struct format_field *format;
3270 for (format = event->format.fields;
3271 format; format = format->next) {
3272 if (strcmp(format->name, name) == 0)
3280 * pevent_find_any_field - find any field by name
3281 * @event: handle for the event
3282 * @name: the name of the field
3284 * Returns a field by the given @name.
3285 * This searchs the common field names first, then
3286 * the non-common ones if a common one was not found.
3288 struct format_field *
3289 pevent_find_any_field(struct event_format *event, const char *name)
3291 struct format_field *format;
3293 format = pevent_find_common_field(event, name);
3296 return pevent_find_field(event, name);
3300 * pevent_read_number - read a number from data
3301 * @pevent: handle for the pevent
3302 * @ptr: the raw data
3303 * @size: the size of the data that holds the number
3305 * Returns the number (converted to host) from the
3308 unsigned long long pevent_read_number(struct pevent *pevent,
3309 const void *ptr, int size)
3313 return *(unsigned char *)ptr;
3315 return data2host2(pevent, ptr);
3317 return data2host4(pevent, ptr);
3319 return data2host8(pevent, ptr);
3327 * pevent_read_number_field - read a number from data
3328 * @field: a handle to the field
3329 * @data: the raw data to read
3330 * @value: the value to place the number in
3332 * Reads raw data according to a field offset and size,
3333 * and translates it into @value.
3335 * Returns 0 on success, -1 otherwise.
3337 int pevent_read_number_field(struct format_field *field, const void *data,
3338 unsigned long long *value)
3342 switch (field->size) {
3347 *value = pevent_read_number(field->event->pevent,
3348 data + field->offset, field->size);
3355 static int get_common_info(struct pevent *pevent,
3356 const char *type, int *offset, int *size)
3358 struct event_format *event;
3359 struct format_field *field;
3362 * All events should have the same common elements.
3363 * Pick any event to find where the type is;
3365 if (!pevent->events) {
3366 do_warning("no event_list!");
3370 event = pevent->events[0];
3371 field = pevent_find_common_field(event, type);
3375 *offset = field->offset;
3376 *size = field->size;
3381 static int __parse_common(struct pevent *pevent, void *data,
3382 int *size, int *offset, const char *name)
3387 ret = get_common_info(pevent, name, offset, size);
3391 return pevent_read_number(pevent, data + *offset, *size);
3394 static int trace_parse_common_type(struct pevent *pevent, void *data)
3396 return __parse_common(pevent, data,
3397 &pevent->type_size, &pevent->type_offset,
3401 static int parse_common_pid(struct pevent *pevent, void *data)
3403 return __parse_common(pevent, data,
3404 &pevent->pid_size, &pevent->pid_offset,
3408 static int parse_common_pc(struct pevent *pevent, void *data)
3410 return __parse_common(pevent, data,
3411 &pevent->pc_size, &pevent->pc_offset,
3412 "common_preempt_count");
3415 static int parse_common_flags(struct pevent *pevent, void *data)
3417 return __parse_common(pevent, data,
3418 &pevent->flags_size, &pevent->flags_offset,
3422 static int parse_common_lock_depth(struct pevent *pevent, void *data)
3424 return __parse_common(pevent, data,
3425 &pevent->ld_size, &pevent->ld_offset,
3426 "common_lock_depth");
3429 static int parse_common_migrate_disable(struct pevent *pevent, void *data)
3431 return __parse_common(pevent, data,
3432 &pevent->ld_size, &pevent->ld_offset,
3433 "common_migrate_disable");
3436 static int events_id_cmp(const void *a, const void *b);
3439 * pevent_find_event - find an event by given id
3440 * @pevent: a handle to the pevent
3441 * @id: the id of the event
3443 * Returns an event that has a given @id.
3445 struct event_format *pevent_find_event(struct pevent *pevent, int id)
3447 struct event_format **eventptr;
3448 struct event_format key;
3449 struct event_format *pkey = &key;
3451 /* Check cache first */
3452 if (pevent->last_event && pevent->last_event->id == id)
3453 return pevent->last_event;
3457 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
3458 sizeof(*pevent->events), events_id_cmp);
3461 pevent->last_event = *eventptr;
3469 * pevent_find_event_by_name - find an event by given name
3470 * @pevent: a handle to the pevent
3471 * @sys: the system name to search for
3472 * @name: the name of the event to search for
3474 * This returns an event with a given @name and under the system
3475 * @sys. If @sys is NULL the first event with @name is returned.
3477 struct event_format *
3478 pevent_find_event_by_name(struct pevent *pevent,
3479 const char *sys, const char *name)
3481 struct event_format *event;
3484 if (pevent->last_event &&
3485 strcmp(pevent->last_event->name, name) == 0 &&
3486 (!sys || strcmp(pevent->last_event->system, sys) == 0))
3487 return pevent->last_event;
3489 for (i = 0; i < pevent->nr_events; i++) {
3490 event = pevent->events[i];
3491 if (strcmp(event->name, name) == 0) {
3494 if (strcmp(event->system, sys) == 0)
3498 if (i == pevent->nr_events)
3501 pevent->last_event = event;
3505 static unsigned long long
3506 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
3508 struct pevent *pevent = event->pevent;
3509 unsigned long long val = 0;
3510 unsigned long long left, right;
3511 struct print_arg *typearg = NULL;
3512 struct print_arg *larg;
3513 unsigned long offset;
3514 unsigned int field_size;
3516 switch (arg->type) {
3521 return strtoull(arg->atom.atom, NULL, 0);
3523 if (!arg->field.field) {
3524 arg->field.field = pevent_find_any_field(event, arg->field.name);
3525 if (!arg->field.field)
3526 goto out_warning_field;
3529 /* must be a number */
3530 val = pevent_read_number(pevent, data + arg->field.field->offset,
3531 arg->field.field->size);
3535 case PRINT_INT_ARRAY:
3539 val = eval_num_arg(data, size, event, arg->typecast.item);
3540 return eval_type(val, arg, 0);
3548 val = process_defined_func(&s, data, size, event, arg);
3549 trace_seq_destroy(&s);
3553 if (strcmp(arg->op.op, "[") == 0) {
3555 * Arrays are special, since we don't want
3556 * to read the arg as is.
3558 right = eval_num_arg(data, size, event, arg->op.right);
3560 /* handle typecasts */
3561 larg = arg->op.left;
3562 while (larg->type == PRINT_TYPE) {
3565 larg = larg->typecast.item;
3568 /* Default to long size */
3569 field_size = pevent->long_size;
3571 switch (larg->type) {
3572 case PRINT_DYNAMIC_ARRAY:
3573 offset = pevent_read_number(pevent,
3574 data + larg->dynarray.field->offset,
3575 larg->dynarray.field->size);
3576 if (larg->dynarray.field->elementsize)
3577 field_size = larg->dynarray.field->elementsize;
3579 * The actual length of the dynamic array is stored
3580 * in the top half of the field, and the offset
3581 * is in the bottom half of the 32 bit field.
3587 if (!larg->field.field) {
3589 pevent_find_any_field(event, larg->field.name);
3590 if (!larg->field.field) {
3592 goto out_warning_field;
3595 field_size = larg->field.field->elementsize;
3596 offset = larg->field.field->offset +
3597 right * larg->field.field->elementsize;
3600 goto default_op; /* oops, all bets off */
3602 val = pevent_read_number(pevent,
3603 data + offset, field_size);
3605 val = eval_type(val, typearg, 1);
3607 } else if (strcmp(arg->op.op, "?") == 0) {
3608 left = eval_num_arg(data, size, event, arg->op.left);
3609 arg = arg->op.right;
3611 val = eval_num_arg(data, size, event, arg->op.left);
3613 val = eval_num_arg(data, size, event, arg->op.right);
3617 left = eval_num_arg(data, size, event, arg->op.left);
3618 right = eval_num_arg(data, size, event, arg->op.right);
3619 switch (arg->op.op[0]) {
3621 switch (arg->op.op[1]) {
3626 val = left != right;
3629 goto out_warning_op;
3637 val = left || right;
3643 val = left && right;
3648 switch (arg->op.op[1]) {
3653 val = left << right;
3656 val = left <= right;
3659 goto out_warning_op;
3663 switch (arg->op.op[1]) {
3668 val = left >> right;
3671 val = left >= right;
3674 goto out_warning_op;
3678 if (arg->op.op[1] != '=')
3679 goto out_warning_op;
3681 val = left == right;
3696 goto out_warning_op;
3699 case PRINT_DYNAMIC_ARRAY_LEN:
3700 offset = pevent_read_number(pevent,
3701 data + arg->dynarray.field->offset,
3702 arg->dynarray.field->size);
3704 * The total allocated length of the dynamic array is
3705 * stored in the top half of the field, and the offset
3706 * is in the bottom half of the 32 bit field.
3708 val = (unsigned long long)(offset >> 16);
3710 case PRINT_DYNAMIC_ARRAY:
3711 /* Without [], we pass the address to the dynamic data */
3712 offset = pevent_read_number(pevent,
3713 data + arg->dynarray.field->offset,
3714 arg->dynarray.field->size);
3716 * The total allocated length of the dynamic array is
3717 * stored in the top half of the field, and the offset
3718 * is in the bottom half of the 32 bit field.
3721 val = (unsigned long long)((unsigned long)data + offset);
3723 default: /* not sure what to do there */
3729 do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
3733 do_warning_event(event, "%s: field %s not found",
3734 __func__, arg->field.name);
3740 unsigned long long value;
3743 static const struct flag flags[] = {
3744 { "HI_SOFTIRQ", 0 },
3745 { "TIMER_SOFTIRQ", 1 },
3746 { "NET_TX_SOFTIRQ", 2 },
3747 { "NET_RX_SOFTIRQ", 3 },
3748 { "BLOCK_SOFTIRQ", 4 },
3749 { "BLOCK_IOPOLL_SOFTIRQ", 5 },
3750 { "TASKLET_SOFTIRQ", 6 },
3751 { "SCHED_SOFTIRQ", 7 },
3752 { "HRTIMER_SOFTIRQ", 8 },
3753 { "RCU_SOFTIRQ", 9 },
3755 { "HRTIMER_NORESTART", 0 },
3756 { "HRTIMER_RESTART", 1 },
3759 static long long eval_flag(const char *flag)
3764 * Some flags in the format files do not get converted.
3765 * If the flag is not numeric, see if it is something that
3766 * we already know about.
3768 if (isdigit(flag[0]))
3769 return strtoull(flag, NULL, 0);
3771 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3772 if (strcmp(flags[i].name, flag) == 0)
3773 return flags[i].value;
3778 static void print_str_to_seq(struct trace_seq *s, const char *format,
3779 int len_arg, const char *str)
3782 trace_seq_printf(s, format, len_arg, str);
3784 trace_seq_printf(s, format, str);
3787 static void print_bitmask_to_seq(struct pevent *pevent,
3788 struct trace_seq *s, const char *format,
3789 int len_arg, const void *data, int size)
3791 int nr_bits = size * 8;
3792 int str_size = (nr_bits + 3) / 4;
3800 * The kernel likes to put in commas every 32 bits, we
3803 str_size += (nr_bits - 1) / 32;
3805 str = malloc(str_size + 1);
3807 do_warning("%s: not enough memory!", __func__);
3812 /* Start out with -2 for the two chars per byte */
3813 for (i = str_size - 2; i >= 0; i -= 2) {
3815 * data points to a bit mask of size bytes.
3816 * In the kernel, this is an array of long words, thus
3817 * endianess is very important.
3819 if (pevent->file_bigendian)
3820 index = size - (len + 1);
3824 snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
3825 memcpy(str + i, buf, 2);
3827 if (!(len & 3) && i > 0) {
3834 trace_seq_printf(s, format, len_arg, str);
3836 trace_seq_printf(s, format, str);
3841 static void print_str_arg(struct trace_seq *s, void *data, int size,
3842 struct event_format *event, const char *format,
3843 int len_arg, struct print_arg *arg)
3845 struct pevent *pevent = event->pevent;
3846 struct print_flag_sym *flag;
3847 struct format_field *field;
3848 struct printk_map *printk;
3849 long long val, fval;
3850 unsigned long long addr;
3856 switch (arg->type) {
3861 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3864 field = arg->field.field;
3866 field = pevent_find_any_field(event, arg->field.name);
3868 str = arg->field.name;
3869 goto out_warning_field;
3871 arg->field.field = field;
3873 /* Zero sized fields, mean the rest of the data */
3874 len = field->size ? : size - field->offset;
3877 * Some events pass in pointers. If this is not an array
3878 * and the size is the same as long_size, assume that it
3881 if (!(field->flags & FIELD_IS_ARRAY) &&
3882 field->size == pevent->long_size) {
3884 /* Handle heterogeneous recording and processing
3888 * Traces recorded on 32-bit devices (32-bit
3889 * addressing) and processed on 64-bit devices:
3890 * In this case, only 32 bits should be read.
3893 * Traces recorded on 64 bit devices and processed
3894 * on 32-bit devices:
3895 * In this case, 64 bits must be read.
3897 addr = (pevent->long_size == 8) ?
3898 *(unsigned long long *)(data + field->offset) :
3899 (unsigned long long)*(unsigned int *)(data + field->offset);
3901 /* Check if it matches a print format */
3902 printk = find_printk(pevent, addr);
3904 trace_seq_puts(s, printk->printk);
3906 trace_seq_printf(s, "%llx", addr);
3909 str = malloc(len + 1);
3911 do_warning_event(event, "%s: not enough memory!",
3915 memcpy(str, data + field->offset, len);
3917 print_str_to_seq(s, format, len_arg, str);
3921 val = eval_num_arg(data, size, event, arg->flags.field);
3923 for (flag = arg->flags.flags; flag; flag = flag->next) {
3924 fval = eval_flag(flag->value);
3925 if (!val && fval < 0) {
3926 print_str_to_seq(s, format, len_arg, flag->str);
3929 if (fval > 0 && (val & fval) == fval) {
3930 if (print && arg->flags.delim)
3931 trace_seq_puts(s, arg->flags.delim);
3932 print_str_to_seq(s, format, len_arg, flag->str);
3939 val = eval_num_arg(data, size, event, arg->symbol.field);
3940 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3941 fval = eval_flag(flag->value);
3943 print_str_to_seq(s, format, len_arg, flag->str);
3949 if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
3950 unsigned long offset;
3951 offset = pevent_read_number(pevent,
3952 data + arg->hex.field->dynarray.field->offset,
3953 arg->hex.field->dynarray.field->size);
3954 hex = data + (offset & 0xffff);
3956 field = arg->hex.field->field.field;
3958 str = arg->hex.field->field.name;
3959 field = pevent_find_any_field(event, str);
3961 goto out_warning_field;
3962 arg->hex.field->field.field = field;
3964 hex = data + field->offset;
3966 len = eval_num_arg(data, size, event, arg->hex.size);
3967 for (i = 0; i < len; i++) {
3969 trace_seq_putc(s, ' ');
3970 trace_seq_printf(s, "%02x", hex[i]);
3974 case PRINT_INT_ARRAY: {
3978 if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
3979 unsigned long offset;
3980 struct format_field *field =
3981 arg->int_array.field->dynarray.field;
3982 offset = pevent_read_number(pevent,
3983 data + field->offset,
3985 num = data + (offset & 0xffff);
3987 field = arg->int_array.field->field.field;
3989 str = arg->int_array.field->field.name;
3990 field = pevent_find_any_field(event, str);
3992 goto out_warning_field;
3993 arg->int_array.field->field.field = field;
3995 num = data + field->offset;
3997 len = eval_num_arg(data, size, event, arg->int_array.count);
3998 el_size = eval_num_arg(data, size, event,
3999 arg->int_array.el_size);
4000 for (i = 0; i < len; i++) {
4002 trace_seq_putc(s, ' ');
4005 trace_seq_printf(s, "%u", *(uint8_t *)num);
4006 } else if (el_size == 2) {
4007 trace_seq_printf(s, "%u", *(uint16_t *)num);
4008 } else if (el_size == 4) {
4009 trace_seq_printf(s, "%u", *(uint32_t *)num);
4010 } else if (el_size == 8) {
4011 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4013 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4014 el_size, *(uint8_t *)num);
4024 case PRINT_STRING: {
4027 if (arg->string.offset == -1) {
4028 struct format_field *f;
4030 f = pevent_find_any_field(event, arg->string.string);
4031 arg->string.offset = f->offset;
4033 str_offset = data2host4(pevent, data + arg->string.offset);
4034 str_offset &= 0xffff;
4035 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4039 print_str_to_seq(s, format, len_arg, arg->string.string);
4041 case PRINT_BITMASK: {
4045 if (arg->bitmask.offset == -1) {
4046 struct format_field *f;
4048 f = pevent_find_any_field(event, arg->bitmask.bitmask);
4049 arg->bitmask.offset = f->offset;
4051 bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
4052 bitmask_size = bitmask_offset >> 16;
4053 bitmask_offset &= 0xffff;
4054 print_bitmask_to_seq(pevent, s, format, len_arg,
4055 data + bitmask_offset, bitmask_size);
4060 * The only op for string should be ? :
4062 if (arg->op.op[0] != '?')
4064 val = eval_num_arg(data, size, event, arg->op.left);
4066 print_str_arg(s, data, size, event,
4067 format, len_arg, arg->op.right->op.left);
4069 print_str_arg(s, data, size, event,
4070 format, len_arg, arg->op.right->op.right);
4073 process_defined_func(s, data, size, event, arg);
4083 do_warning_event(event, "%s: field %s not found",
4084 __func__, arg->field.name);
4087 static unsigned long long
4088 process_defined_func(struct trace_seq *s, void *data, int size,
4089 struct event_format *event, struct print_arg *arg)
4091 struct pevent_function_handler *func_handle = arg->func.func;
4092 struct pevent_func_params *param;
4093 unsigned long long *args;
4094 unsigned long long ret;
4095 struct print_arg *farg;
4096 struct trace_seq str;
4098 struct save_str *next;
4100 } *strings = NULL, *string;
4103 if (!func_handle->nr_args) {
4104 ret = (*func_handle->func)(s, NULL);
4108 farg = arg->func.args;
4109 param = func_handle->params;
4112 args = malloc(sizeof(*args) * func_handle->nr_args);
4116 for (i = 0; i < func_handle->nr_args; i++) {
4117 switch (param->type) {
4118 case PEVENT_FUNC_ARG_INT:
4119 case PEVENT_FUNC_ARG_LONG:
4120 case PEVENT_FUNC_ARG_PTR:
4121 args[i] = eval_num_arg(data, size, event, farg);
4123 case PEVENT_FUNC_ARG_STRING:
4124 trace_seq_init(&str);
4125 print_str_arg(&str, data, size, event, "%s", -1, farg);
4126 trace_seq_terminate(&str);
4127 string = malloc(sizeof(*string));
4129 do_warning_event(event, "%s(%d): malloc str",
4130 __func__, __LINE__);
4133 string->next = strings;
4134 string->str = strdup(str.buffer);
4137 do_warning_event(event, "%s(%d): malloc str",
4138 __func__, __LINE__);
4141 args[i] = (uintptr_t)string->str;
4143 trace_seq_destroy(&str);
4147 * Something went totally wrong, this is not
4148 * an input error, something in this code broke.
4150 do_warning_event(event, "Unexpected end of arguments\n");
4154 param = param->next;
4157 ret = (*func_handle->func)(s, args);
4162 strings = string->next;
4168 /* TBD : handle return type here */
4172 static void free_args(struct print_arg *args)
4174 struct print_arg *next;
4184 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
4186 struct pevent *pevent = event->pevent;
4187 struct format_field *field, *ip_field;
4188 struct print_arg *args, *arg, **next;
4189 unsigned long long ip, val;
4194 field = pevent->bprint_buf_field;
4195 ip_field = pevent->bprint_ip_field;
4198 field = pevent_find_field(event, "buf");
4200 do_warning_event(event, "can't find buffer field for binary printk");
4203 ip_field = pevent_find_field(event, "ip");
4205 do_warning_event(event, "can't find ip field for binary printk");
4208 pevent->bprint_buf_field = field;
4209 pevent->bprint_ip_field = ip_field;
4212 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
4215 * The first arg is the IP pointer.
4219 do_warning_event(event, "%s(%d): not enough memory!",
4220 __func__, __LINE__);
4227 arg->type = PRINT_ATOM;
4229 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4232 /* skip the first "%ps: " */
4233 for (ptr = fmt + 5, bptr = data + field->offset;
4234 bptr < data + size && *ptr; ptr++) {
4269 vsize = pevent->long_size;
4283 /* the pointers are always 4 bytes aligned */
4284 bptr = (void *)(((unsigned long)bptr + 3) &
4286 val = pevent_read_number(pevent, bptr, vsize);
4290 do_warning_event(event, "%s(%d): not enough memory!",
4291 __func__, __LINE__);
4295 arg->type = PRINT_ATOM;
4296 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4303 * The '*' case means that an arg is used as the length.
4304 * We need to continue to figure out for what.
4313 do_warning_event(event, "%s(%d): not enough memory!",
4314 __func__, __LINE__);
4318 arg->type = PRINT_BSTRING;
4319 arg->string.string = strdup(bptr);
4320 if (!arg->string.string)
4322 bptr += strlen(bptr) + 1;
4339 get_bprint_format(void *data, int size __maybe_unused,
4340 struct event_format *event)
4342 struct pevent *pevent = event->pevent;
4343 unsigned long long addr;
4344 struct format_field *field;
4345 struct printk_map *printk;
4348 field = pevent->bprint_fmt_field;
4351 field = pevent_find_field(event, "fmt");
4353 do_warning_event(event, "can't find format field for binary printk");
4356 pevent->bprint_fmt_field = field;
4359 addr = pevent_read_number(pevent, data + field->offset, field->size);
4361 printk = find_printk(pevent, addr);
4363 if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4368 if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
4374 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4375 struct event_format *event, struct print_arg *arg)
4378 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4380 if (arg->type == PRINT_FUNC) {
4381 process_defined_func(s, data, size, event, arg);
4385 if (arg->type != PRINT_FIELD) {
4386 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4392 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4393 if (!arg->field.field) {
4395 pevent_find_any_field(event, arg->field.name);
4396 if (!arg->field.field) {
4397 do_warning_event(event, "%s: field %s not found",
4398 __func__, arg->field.name);
4402 if (arg->field.field->size != 6) {
4403 trace_seq_printf(s, "INVALIDMAC");
4406 buf = data + arg->field.field->offset;
4407 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4410 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4415 fmt = "%03d.%03d.%03d.%03d";
4417 fmt = "%d.%d.%d.%d";
4419 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4422 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4424 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4425 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4428 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4430 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4433 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4436 unsigned char zerolength[8];
4441 bool needcolon = false;
4443 struct in6_addr in6;
4445 memcpy(&in6, addr, sizeof(struct in6_addr));
4447 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4449 memset(zerolength, 0, sizeof(zerolength));
4456 /* find position of longest 0 run */
4457 for (i = 0; i < range; i++) {
4458 for (j = i; j < range; j++) {
4459 if (in6.s6_addr16[j] != 0)
4464 for (i = 0; i < range; i++) {
4465 if (zerolength[i] > longest) {
4466 longest = zerolength[i];
4470 if (longest == 1) /* don't compress a single 0 */
4474 for (i = 0; i < range; i++) {
4475 if (i == colonpos) {
4476 if (needcolon || i == 0)
4477 trace_seq_printf(s, ":");
4478 trace_seq_printf(s, ":");
4484 trace_seq_printf(s, ":");
4487 /* hex u16 without leading 0s */
4488 word = ntohs(in6.s6_addr16[i]);
4492 trace_seq_printf(s, "%x%02x", hi, lo);
4494 trace_seq_printf(s, "%x", lo);
4501 trace_seq_printf(s, ":");
4502 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4508 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4512 for (j = 0; j < 16; j += 2) {
4513 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4514 if (i == 'I' && j < 14)
4515 trace_seq_printf(s, ":");
4520 * %pi4 print an IPv4 address with leading zeros
4521 * %pI4 print an IPv4 address without leading zeros
4522 * %pi6 print an IPv6 address without colons
4523 * %pI6 print an IPv6 address with colons
4524 * %pI6c print an IPv6 address in compressed form with colons
4525 * %pISpc print an IP address based on sockaddr; p adds port.
4527 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4528 void *data, int size, struct event_format *event,
4529 struct print_arg *arg)
4533 if (arg->type == PRINT_FUNC) {
4534 process_defined_func(s, data, size, event, arg);
4538 if (arg->type != PRINT_FIELD) {
4539 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4543 if (!arg->field.field) {
4545 pevent_find_any_field(event, arg->field.name);
4546 if (!arg->field.field) {
4547 do_warning("%s: field %s not found",
4548 __func__, arg->field.name);
4553 buf = data + arg->field.field->offset;
4555 if (arg->field.field->size != 4) {
4556 trace_seq_printf(s, "INVALIDIPv4");
4559 print_ip4_addr(s, i, buf);
4564 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4565 void *data, int size, struct event_format *event,
4566 struct print_arg *arg)
4573 if (i == 'I' && *ptr == 'c') {
4579 if (arg->type == PRINT_FUNC) {
4580 process_defined_func(s, data, size, event, arg);
4584 if (arg->type != PRINT_FIELD) {
4585 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4589 if (!arg->field.field) {
4591 pevent_find_any_field(event, arg->field.name);
4592 if (!arg->field.field) {
4593 do_warning("%s: field %s not found",
4594 __func__, arg->field.name);
4599 buf = data + arg->field.field->offset;
4601 if (arg->field.field->size != 16) {
4602 trace_seq_printf(s, "INVALIDIPv6");
4607 print_ip6c_addr(s, buf);
4609 print_ip6_addr(s, i, buf);
4614 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4615 void *data, int size, struct event_format *event,
4616 struct print_arg *arg)
4618 char have_c = 0, have_p = 0;
4620 struct sockaddr_storage *sa;
4637 if (arg->type == PRINT_FUNC) {
4638 process_defined_func(s, data, size, event, arg);
4642 if (arg->type != PRINT_FIELD) {
4643 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4647 if (!arg->field.field) {
4649 pevent_find_any_field(event, arg->field.name);
4650 if (!arg->field.field) {
4651 do_warning("%s: field %s not found",
4652 __func__, arg->field.name);
4657 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4659 if (sa->ss_family == AF_INET) {
4660 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4662 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4663 trace_seq_printf(s, "INVALIDIPv4");
4667 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4669 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4672 } else if (sa->ss_family == AF_INET6) {
4673 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4675 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4676 trace_seq_printf(s, "INVALIDIPv6");
4681 trace_seq_printf(s, "[");
4683 buf = (unsigned char *) &sa6->sin6_addr;
4685 print_ip6c_addr(s, buf);
4687 print_ip6_addr(s, i, buf);
4690 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4696 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4697 void *data, int size, struct event_format *event,
4698 struct print_arg *arg)
4700 char i = *ptr; /* 'i' or 'I' */
4713 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4716 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4719 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4728 static int is_printable_array(char *p, unsigned int len)
4732 for (i = 0; i < len && p[i]; i++)
4733 if (!isprint(p[i]) && !isspace(p[i]))
4738 static void print_event_fields(struct trace_seq *s, void *data,
4739 int size __maybe_unused,
4740 struct event_format *event)
4742 struct format_field *field;
4743 unsigned long long val;
4744 unsigned int offset, len, i;
4746 field = event->format.fields;
4748 trace_seq_printf(s, " %s=", field->name);
4749 if (field->flags & FIELD_IS_ARRAY) {
4750 offset = field->offset;
4752 if (field->flags & FIELD_IS_DYNAMIC) {
4753 val = pevent_read_number(event->pevent, data + offset, len);
4758 if (field->flags & FIELD_IS_STRING &&
4759 is_printable_array(data + offset, len)) {
4760 trace_seq_printf(s, "%s", (char *)data + offset);
4762 trace_seq_puts(s, "ARRAY[");
4763 for (i = 0; i < len; i++) {
4765 trace_seq_puts(s, ", ");
4766 trace_seq_printf(s, "%02x",
4767 *((unsigned char *)data + offset + i));
4769 trace_seq_putc(s, ']');
4770 field->flags &= ~FIELD_IS_STRING;
4773 val = pevent_read_number(event->pevent, data + field->offset,
4775 if (field->flags & FIELD_IS_POINTER) {
4776 trace_seq_printf(s, "0x%llx", val);
4777 } else if (field->flags & FIELD_IS_SIGNED) {
4778 switch (field->size) {
4781 * If field is long then print it in hex.
4782 * A long usually stores pointers.
4784 if (field->flags & FIELD_IS_LONG)
4785 trace_seq_printf(s, "0x%x", (int)val);
4787 trace_seq_printf(s, "%d", (int)val);
4790 trace_seq_printf(s, "%2d", (short)val);
4793 trace_seq_printf(s, "%1d", (char)val);
4796 trace_seq_printf(s, "%lld", val);
4799 if (field->flags & FIELD_IS_LONG)
4800 trace_seq_printf(s, "0x%llx", val);
4802 trace_seq_printf(s, "%llu", val);
4805 field = field->next;
4809 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
4811 struct pevent *pevent = event->pevent;
4812 struct print_fmt *print_fmt = &event->print_fmt;
4813 struct print_arg *arg = print_fmt->args;
4814 struct print_arg *args = NULL;
4815 const char *ptr = print_fmt->format;
4816 unsigned long long val;
4817 struct func_map *func;
4818 const char *saveptr;
4820 char *bprint_fmt = NULL;
4828 if (event->flags & EVENT_FL_FAILED) {
4829 trace_seq_printf(s, "[FAILED TO PARSE]");
4830 print_event_fields(s, data, size, event);
4834 if (event->flags & EVENT_FL_ISBPRINT) {
4835 bprint_fmt = get_bprint_format(data, size, event);
4836 args = make_bprint_args(bprint_fmt, data, size, event);
4841 for (; *ptr; ptr++) {
4847 trace_seq_putc(s, '\n');
4850 trace_seq_putc(s, '\t');
4853 trace_seq_putc(s, '\r');
4856 trace_seq_putc(s, '\\');
4859 trace_seq_putc(s, *ptr);
4863 } else if (*ptr == '%') {
4871 trace_seq_putc(s, '%');
4874 /* FIXME: need to handle properly */
4886 /* The argument is the length. */
4888 do_warning_event(event, "no argument match");
4889 event->flags |= EVENT_FL_FAILED;
4892 len_arg = eval_num_arg(data, size, event, arg);
4903 if (pevent->long_size == 4)
4908 if (*(ptr+1) == 'F' || *(ptr+1) == 'f' ||
4909 *(ptr+1) == 'S' || *(ptr+1) == 's') {
4912 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
4913 print_mac_arg(s, *(ptr+1), data, size, event, arg);
4917 } else if (*(ptr+1) == 'I' || *(ptr+1) == 'i') {
4920 n = print_ip_arg(s, ptr+1, data, size, event, arg);
4935 do_warning_event(event, "no argument match");
4936 event->flags |= EVENT_FL_FAILED;
4940 len = ((unsigned long)ptr + 1) -
4941 (unsigned long)saveptr;
4943 /* should never happen */
4945 do_warning_event(event, "bad format!");
4946 event->flags |= EVENT_FL_FAILED;
4950 memcpy(format, saveptr, len);
4953 val = eval_num_arg(data, size, event, arg);
4957 func = find_func(pevent, val);
4959 trace_seq_puts(s, func->func);
4960 if (show_func == 'F')
4967 if (pevent->long_size == 8 && ls &&
4968 sizeof(long) != 8) {
4972 /* make %l into %ll */
4973 p = strchr(format, 'l');
4975 memmove(p+1, p, strlen(p)+1);
4976 else if (strcmp(format, "%p") == 0)
4977 strcpy(format, "0x%llx");
4982 trace_seq_printf(s, format, len_arg, (char)val);
4984 trace_seq_printf(s, format, (char)val);
4988 trace_seq_printf(s, format, len_arg, (short)val);
4990 trace_seq_printf(s, format, (short)val);
4994 trace_seq_printf(s, format, len_arg, (int)val);
4996 trace_seq_printf(s, format, (int)val);
5000 trace_seq_printf(s, format, len_arg, (long)val);
5002 trace_seq_printf(s, format, (long)val);
5006 trace_seq_printf(s, format, len_arg,
5009 trace_seq_printf(s, format, (long long)val);
5012 do_warning_event(event, "bad count (%d)", ls);
5013 event->flags |= EVENT_FL_FAILED;
5018 do_warning_event(event, "no matching argument");
5019 event->flags |= EVENT_FL_FAILED;
5023 len = ((unsigned long)ptr + 1) -
5024 (unsigned long)saveptr;
5026 /* should never happen */
5028 do_warning_event(event, "bad format!");
5029 event->flags |= EVENT_FL_FAILED;
5033 memcpy(format, saveptr, len);
5037 /* Use helper trace_seq */
5039 print_str_arg(&p, data, size, event,
5040 format, len_arg, arg);
5041 trace_seq_terminate(&p);
5042 trace_seq_puts(s, p.buffer);
5043 trace_seq_destroy(&p);
5047 trace_seq_printf(s, ">%c<", *ptr);
5051 trace_seq_putc(s, *ptr);
5054 if (event->flags & EVENT_FL_FAILED) {
5056 trace_seq_printf(s, "[FAILED TO PARSE]");
5066 * pevent_data_lat_fmt - parse the data for the latency format
5067 * @pevent: a handle to the pevent
5068 * @s: the trace_seq to write to
5069 * @record: the record to read from
5071 * This parses out the Latency format (interrupts disabled,
5072 * need rescheduling, in hard/soft interrupt, preempt count
5073 * and lock depth) and places it into the trace_seq.
5075 void pevent_data_lat_fmt(struct pevent *pevent,
5076 struct trace_seq *s, struct pevent_record *record)
5078 static int check_lock_depth = 1;
5079 static int check_migrate_disable = 1;
5080 static int lock_depth_exists;
5081 static int migrate_disable_exists;
5082 unsigned int lat_flags;
5085 int migrate_disable;
5088 void *data = record->data;
5090 lat_flags = parse_common_flags(pevent, data);
5091 pc = parse_common_pc(pevent, data);
5092 /* lock_depth may not always exist */
5093 if (lock_depth_exists)
5094 lock_depth = parse_common_lock_depth(pevent, data);
5095 else if (check_lock_depth) {
5096 lock_depth = parse_common_lock_depth(pevent, data);
5098 check_lock_depth = 0;
5100 lock_depth_exists = 1;
5103 /* migrate_disable may not always exist */
5104 if (migrate_disable_exists)
5105 migrate_disable = parse_common_migrate_disable(pevent, data);
5106 else if (check_migrate_disable) {
5107 migrate_disable = parse_common_migrate_disable(pevent, data);
5108 if (migrate_disable < 0)
5109 check_migrate_disable = 0;
5111 migrate_disable_exists = 1;
5114 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5115 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5117 trace_seq_printf(s, "%c%c%c",
5118 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5119 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5121 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5123 (hardirq && softirq) ? 'H' :
5124 hardirq ? 'h' : softirq ? 's' : '.');
5127 trace_seq_printf(s, "%x", pc);
5129 trace_seq_putc(s, '.');
5131 if (migrate_disable_exists) {
5132 if (migrate_disable < 0)
5133 trace_seq_putc(s, '.');
5135 trace_seq_printf(s, "%d", migrate_disable);
5138 if (lock_depth_exists) {
5140 trace_seq_putc(s, '.');
5142 trace_seq_printf(s, "%d", lock_depth);
5145 trace_seq_terminate(s);
5149 * pevent_data_type - parse out the given event type
5150 * @pevent: a handle to the pevent
5151 * @rec: the record to read from
5153 * This returns the event id from the @rec.
5155 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
5157 return trace_parse_common_type(pevent, rec->data);
5161 * pevent_data_event_from_type - find the event by a given type
5162 * @pevent: a handle to the pevent
5163 * @type: the type of the event.
5165 * This returns the event form a given @type;
5167 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
5169 return pevent_find_event(pevent, type);
5173 * pevent_data_pid - parse the PID from raw data
5174 * @pevent: a handle to the pevent
5175 * @rec: the record to parse
5177 * This returns the PID from a raw data.
5179 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
5181 return parse_common_pid(pevent, rec->data);
5185 * pevent_data_comm_from_pid - return the command line from PID
5186 * @pevent: a handle to the pevent
5187 * @pid: the PID of the task to search for
5189 * This returns a pointer to the command line that has the given
5192 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
5196 comm = find_cmdline(pevent, pid);
5200 static struct cmdline *
5201 pid_from_cmdlist(struct pevent *pevent, const char *comm, struct cmdline *next)
5203 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5206 cmdlist = cmdlist->next;
5208 cmdlist = pevent->cmdlist;
5210 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5211 cmdlist = cmdlist->next;
5213 return (struct cmdline *)cmdlist;
5217 * pevent_data_pid_from_comm - return the pid from a given comm
5218 * @pevent: a handle to the pevent
5219 * @comm: the cmdline to find the pid from
5220 * @next: the cmdline structure to find the next comm
5222 * This returns the cmdline structure that holds a pid for a given
5223 * comm, or NULL if none found. As there may be more than one pid for
5224 * a given comm, the result of this call can be passed back into
5225 * a recurring call in the @next paramater, and then it will find the
5227 * Also, it does a linear seach, so it may be slow.
5229 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
5230 struct cmdline *next)
5232 struct cmdline *cmdline;
5235 * If the cmdlines have not been converted yet, then use
5238 if (!pevent->cmdlines)
5239 return pid_from_cmdlist(pevent, comm, next);
5243 * The next pointer could have been still from
5244 * a previous call before cmdlines were created
5246 if (next < pevent->cmdlines ||
5247 next >= pevent->cmdlines + pevent->cmdline_count)
5254 cmdline = pevent->cmdlines;
5256 while (cmdline < pevent->cmdlines + pevent->cmdline_count) {
5257 if (strcmp(cmdline->comm, comm) == 0)
5265 * pevent_cmdline_pid - return the pid associated to a given cmdline
5266 * @cmdline: The cmdline structure to get the pid from
5268 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5271 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline)
5273 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5279 * If cmdlines have not been created yet, or cmdline is
5280 * not part of the array, then treat it as a cmdlist instead.
5282 if (!pevent->cmdlines ||
5283 cmdline < pevent->cmdlines ||
5284 cmdline >= pevent->cmdlines + pevent->cmdline_count)
5285 return cmdlist->pid;
5287 return cmdline->pid;
5291 * pevent_data_comm_from_pid - parse the data into the print format
5292 * @s: the trace_seq to write to
5293 * @event: the handle to the event
5294 * @record: the record to read from
5296 * This parses the raw @data using the given @event information and
5297 * writes the print format into the trace_seq.
5299 void pevent_event_info(struct trace_seq *s, struct event_format *event,
5300 struct pevent_record *record)
5302 int print_pretty = 1;
5304 if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
5305 print_event_fields(s, record->data, record->size, event);
5308 if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
5309 print_pretty = event->handler(s, record, event,
5313 pretty_print(s, record->data, record->size, event);
5316 trace_seq_terminate(s);
5319 static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
5321 if (!use_trace_clock)
5324 if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
5325 || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
5328 /* trace_clock is setting in tsc or counter mode */
5332 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
5333 struct pevent_record *record, bool use_trace_clock)
5335 static const char *spaces = " "; /* 20 spaces */
5336 struct event_format *event;
5338 unsigned long usecs;
5339 unsigned long nsecs;
5341 void *data = record->data;
5346 bool use_usec_format;
5348 use_usec_format = is_timestamp_in_us(pevent->trace_clock,
5350 if (use_usec_format) {
5351 secs = record->ts / NSECS_PER_SEC;
5352 nsecs = record->ts - secs * NSECS_PER_SEC;
5355 if (record->size < 0) {
5356 do_warning("ug! negative record size %d", record->size);
5360 type = trace_parse_common_type(pevent, data);
5362 event = pevent_find_event(pevent, type);
5364 do_warning("ug! no event found for type %d", type);
5368 pid = parse_common_pid(pevent, data);
5369 comm = find_cmdline(pevent, pid);
5371 if (pevent->latency_format) {
5372 trace_seq_printf(s, "%8.8s-%-5d %3d",
5373 comm, pid, record->cpu);
5374 pevent_data_lat_fmt(pevent, s, record);
5376 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
5378 if (use_usec_format) {
5379 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
5383 usecs = (nsecs + 500) / NSECS_PER_USEC;
5387 trace_seq_printf(s, " %5lu.%0*lu: %s: ",
5388 secs, p, usecs, event->name);
5390 trace_seq_printf(s, " %12llu: %s: ",
5391 record->ts, event->name);
5393 /* Space out the event names evenly. */
5394 len = strlen(event->name);
5396 trace_seq_printf(s, "%.*s", 20 - len, spaces);
5398 pevent_event_info(s, event, record);
5401 static int events_id_cmp(const void *a, const void *b)
5403 struct event_format * const * ea = a;
5404 struct event_format * const * eb = b;
5406 if ((*ea)->id < (*eb)->id)
5409 if ((*ea)->id > (*eb)->id)
5415 static int events_name_cmp(const void *a, const void *b)
5417 struct event_format * const * ea = a;
5418 struct event_format * const * eb = b;
5421 res = strcmp((*ea)->name, (*eb)->name);
5425 res = strcmp((*ea)->system, (*eb)->system);
5429 return events_id_cmp(a, b);
5432 static int events_system_cmp(const void *a, const void *b)
5434 struct event_format * const * ea = a;
5435 struct event_format * const * eb = b;
5438 res = strcmp((*ea)->system, (*eb)->system);
5442 res = strcmp((*ea)->name, (*eb)->name);
5446 return events_id_cmp(a, b);
5449 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
5451 struct event_format **events;
5452 int (*sort)(const void *a, const void *b);
5454 events = pevent->sort_events;
5456 if (events && pevent->last_type == sort_type)
5460 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
5464 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
5465 events[pevent->nr_events] = NULL;
5467 pevent->sort_events = events;
5469 /* the internal events are sorted by id */
5470 if (sort_type == EVENT_SORT_ID) {
5471 pevent->last_type = sort_type;
5476 switch (sort_type) {
5478 sort = events_id_cmp;
5480 case EVENT_SORT_NAME:
5481 sort = events_name_cmp;
5483 case EVENT_SORT_SYSTEM:
5484 sort = events_system_cmp;
5490 qsort(events, pevent->nr_events, sizeof(*events), sort);
5491 pevent->last_type = sort_type;
5496 static struct format_field **
5497 get_event_fields(const char *type, const char *name,
5498 int count, struct format_field *list)
5500 struct format_field **fields;
5501 struct format_field *field;
5504 fields = malloc(sizeof(*fields) * (count + 1));
5508 for (field = list; field; field = field->next) {
5509 fields[i++] = field;
5510 if (i == count + 1) {
5511 do_warning("event %s has more %s fields than specified",
5519 do_warning("event %s has less %s fields than specified",
5528 * pevent_event_common_fields - return a list of common fields for an event
5529 * @event: the event to return the common fields of.
5531 * Returns an allocated array of fields. The last item in the array is NULL.
5532 * The array must be freed with free().
5534 struct format_field **pevent_event_common_fields(struct event_format *event)
5536 return get_event_fields("common", event->name,
5537 event->format.nr_common,
5538 event->format.common_fields);
5542 * pevent_event_fields - return a list of event specific fields for an event
5543 * @event: the event to return the fields of.
5545 * Returns an allocated array of fields. The last item in the array is NULL.
5546 * The array must be freed with free().
5548 struct format_field **pevent_event_fields(struct event_format *event)
5550 return get_event_fields("event", event->name,
5551 event->format.nr_fields,
5552 event->format.fields);
5555 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
5557 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5559 trace_seq_puts(s, ", ");
5560 print_fields(s, field->next);
5565 static void print_args(struct print_arg *args)
5567 int print_paren = 1;
5570 switch (args->type) {
5575 printf("%s", args->atom.atom);
5578 printf("REC->%s", args->field.name);
5581 printf("__print_flags(");
5582 print_args(args->flags.field);
5583 printf(", %s, ", args->flags.delim);
5585 print_fields(&s, args->flags.flags);
5586 trace_seq_do_printf(&s);
5587 trace_seq_destroy(&s);
5591 printf("__print_symbolic(");
5592 print_args(args->symbol.field);
5595 print_fields(&s, args->symbol.symbols);
5596 trace_seq_do_printf(&s);
5597 trace_seq_destroy(&s);
5601 printf("__print_hex(");
5602 print_args(args->hex.field);
5604 print_args(args->hex.size);
5607 case PRINT_INT_ARRAY:
5608 printf("__print_array(");
5609 print_args(args->int_array.field);
5611 print_args(args->int_array.count);
5613 print_args(args->int_array.el_size);
5618 printf("__get_str(%s)", args->string.string);
5621 printf("__get_bitmask(%s)", args->bitmask.bitmask);
5624 printf("(%s)", args->typecast.type);
5625 print_args(args->typecast.item);
5628 if (strcmp(args->op.op, ":") == 0)
5632 print_args(args->op.left);
5633 printf(" %s ", args->op.op);
5634 print_args(args->op.right);
5639 /* we should warn... */
5644 print_args(args->next);
5648 static void parse_header_field(const char *field,
5649 int *offset, int *size, int mandatory)
5651 unsigned long long save_input_buf_ptr;
5652 unsigned long long save_input_buf_siz;
5656 save_input_buf_ptr = input_buf_ptr;
5657 save_input_buf_siz = input_buf_siz;
5659 if (read_expected(EVENT_ITEM, "field") < 0)
5661 if (read_expected(EVENT_OP, ":") < 0)
5665 if (read_expect_type(EVENT_ITEM, &token) < 0)
5670 * If this is not a mandatory field, then test it first.
5673 if (read_expected(EVENT_ITEM, field) < 0)
5676 if (read_expect_type(EVENT_ITEM, &token) < 0)
5678 if (strcmp(token, field) != 0)
5683 if (read_expected(EVENT_OP, ";") < 0)
5685 if (read_expected(EVENT_ITEM, "offset") < 0)
5687 if (read_expected(EVENT_OP, ":") < 0)
5689 if (read_expect_type(EVENT_ITEM, &token) < 0)
5691 *offset = atoi(token);
5693 if (read_expected(EVENT_OP, ";") < 0)
5695 if (read_expected(EVENT_ITEM, "size") < 0)
5697 if (read_expected(EVENT_OP, ":") < 0)
5699 if (read_expect_type(EVENT_ITEM, &token) < 0)
5701 *size = atoi(token);
5703 if (read_expected(EVENT_OP, ";") < 0)
5705 type = read_token(&token);
5706 if (type != EVENT_NEWLINE) {
5707 /* newer versions of the kernel have a "signed" type */
5708 if (type != EVENT_ITEM)
5711 if (strcmp(token, "signed") != 0)
5716 if (read_expected(EVENT_OP, ":") < 0)
5719 if (read_expect_type(EVENT_ITEM, &token))
5723 if (read_expected(EVENT_OP, ";") < 0)
5726 if (read_expect_type(EVENT_NEWLINE, &token))
5734 input_buf_ptr = save_input_buf_ptr;
5735 input_buf_siz = save_input_buf_siz;
5742 * pevent_parse_header_page - parse the data stored in the header page
5743 * @pevent: the handle to the pevent
5744 * @buf: the buffer storing the header page format string
5745 * @size: the size of @buf
5746 * @long_size: the long size to use if there is no header
5748 * This parses the header page format for information on the
5749 * ring buffer used. The @buf should be copied from
5751 * /sys/kernel/debug/tracing/events/header_page
5753 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
5760 * Old kernels did not have header page info.
5761 * Sorry but we just use what we find here in user space.
5763 pevent->header_page_ts_size = sizeof(long long);
5764 pevent->header_page_size_size = long_size;
5765 pevent->header_page_data_offset = sizeof(long long) + long_size;
5766 pevent->old_format = 1;
5769 init_input_buf(buf, size);
5771 parse_header_field("timestamp", &pevent->header_page_ts_offset,
5772 &pevent->header_page_ts_size, 1);
5773 parse_header_field("commit", &pevent->header_page_size_offset,
5774 &pevent->header_page_size_size, 1);
5775 parse_header_field("overwrite", &pevent->header_page_overwrite,
5777 parse_header_field("data", &pevent->header_page_data_offset,
5778 &pevent->header_page_data_size, 1);
5783 static int event_matches(struct event_format *event,
5784 int id, const char *sys_name,
5785 const char *event_name)
5787 if (id >= 0 && id != event->id)
5790 if (event_name && (strcmp(event_name, event->name) != 0))
5793 if (sys_name && (strcmp(sys_name, event->system) != 0))
5799 static void free_handler(struct event_handler *handle)
5801 free((void *)handle->sys_name);
5802 free((void *)handle->event_name);
5806 static int find_event_handle(struct pevent *pevent, struct event_format *event)
5808 struct event_handler *handle, **next;
5810 for (next = &pevent->handlers; *next;
5811 next = &(*next)->next) {
5813 if (event_matches(event, handle->id,
5815 handle->event_name))
5822 pr_stat("overriding event (%d) %s:%s with new print handler",
5823 event->id, event->system, event->name);
5825 event->handler = handle->func;
5826 event->context = handle->context;
5828 *next = handle->next;
5829 free_handler(handle);
5835 * __pevent_parse_format - parse the event format
5836 * @buf: the buffer storing the event format string
5837 * @size: the size of @buf
5838 * @sys: the system the event belongs to
5840 * This parses the event format and creates an event structure
5841 * to quickly parse raw data for a given event.
5843 * These files currently come from:
5845 * /sys/kernel/debug/tracing/events/.../.../format
5847 enum pevent_errno __pevent_parse_format(struct event_format **eventp,
5848 struct pevent *pevent, const char *buf,
5849 unsigned long size, const char *sys)
5851 struct event_format *event;
5854 init_input_buf(buf, size);
5856 *eventp = event = alloc_event();
5858 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5860 event->name = event_read_name();
5863 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5864 goto event_alloc_failed;
5867 if (strcmp(sys, "ftrace") == 0) {
5868 event->flags |= EVENT_FL_ISFTRACE;
5870 if (strcmp(event->name, "bprint") == 0)
5871 event->flags |= EVENT_FL_ISBPRINT;
5874 event->id = event_read_id();
5875 if (event->id < 0) {
5876 ret = PEVENT_ERRNO__READ_ID_FAILED;
5878 * This isn't an allocation error actually.
5879 * But as the ID is critical, just bail out.
5881 goto event_alloc_failed;
5884 event->system = strdup(sys);
5885 if (!event->system) {
5886 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5887 goto event_alloc_failed;
5890 /* Add pevent to event so that it can be referenced */
5891 event->pevent = pevent;
5893 ret = event_read_format(event);
5895 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
5896 goto event_parse_failed;
5900 * If the event has an override, don't print warnings if the event
5901 * print format fails to parse.
5903 if (pevent && find_event_handle(pevent, event))
5906 ret = event_read_print(event);
5910 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
5911 goto event_parse_failed;
5914 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
5915 struct format_field *field;
5916 struct print_arg *arg, **list;
5918 /* old ftrace had no args */
5919 list = &event->print_fmt.args;
5920 for (field = event->format.fields; field; field = field->next) {
5923 event->flags |= EVENT_FL_FAILED;
5924 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
5926 arg->type = PRINT_FIELD;
5927 arg->field.name = strdup(field->name);
5928 if (!arg->field.name) {
5929 event->flags |= EVENT_FL_FAILED;
5931 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
5933 arg->field.field = field;
5943 event->flags |= EVENT_FL_FAILED;
5947 free(event->system);
5954 static enum pevent_errno
5955 __pevent_parse_event(struct pevent *pevent,
5956 struct event_format **eventp,
5957 const char *buf, unsigned long size,
5960 int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
5961 struct event_format *event = *eventp;
5966 if (pevent && add_event(pevent, event)) {
5967 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5968 goto event_add_failed;
5971 #define PRINT_ARGS 0
5972 if (PRINT_ARGS && event->print_fmt.args)
5973 print_args(event->print_fmt.args);
5978 pevent_free_format(event);
5983 * pevent_parse_format - parse the event format
5984 * @pevent: the handle to the pevent
5985 * @eventp: returned format
5986 * @buf: the buffer storing the event format string
5987 * @size: the size of @buf
5988 * @sys: the system the event belongs to
5990 * This parses the event format and creates an event structure
5991 * to quickly parse raw data for a given event.
5993 * These files currently come from:
5995 * /sys/kernel/debug/tracing/events/.../.../format
5997 enum pevent_errno pevent_parse_format(struct pevent *pevent,
5998 struct event_format **eventp,
6000 unsigned long size, const char *sys)
6002 return __pevent_parse_event(pevent, eventp, buf, size, sys);
6006 * pevent_parse_event - parse the event format
6007 * @pevent: the handle to the pevent
6008 * @buf: the buffer storing the event format string
6009 * @size: the size of @buf
6010 * @sys: the system the event belongs to
6012 * This parses the event format and creates an event structure
6013 * to quickly parse raw data for a given event.
6015 * These files currently come from:
6017 * /sys/kernel/debug/tracing/events/.../.../format
6019 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
6020 unsigned long size, const char *sys)
6022 struct event_format *event = NULL;
6023 return __pevent_parse_event(pevent, &event, buf, size, sys);
6027 #define _PE(code, str) str
6028 static const char * const pevent_error_str[] = {
6033 int pevent_strerror(struct pevent *pevent __maybe_unused,
6034 enum pevent_errno errnum, char *buf, size_t buflen)
6040 msg = strerror_r(errnum, buf, buflen);
6042 size_t len = strlen(msg);
6043 memcpy(buf, msg, min(buflen - 1, len));
6044 *(buf + min(buflen - 1, len)) = '\0';
6049 if (errnum <= __PEVENT_ERRNO__START ||
6050 errnum >= __PEVENT_ERRNO__END)
6053 idx = errnum - __PEVENT_ERRNO__START - 1;
6054 msg = pevent_error_str[idx];
6055 snprintf(buf, buflen, "%s", msg);
6060 int get_field_val(struct trace_seq *s, struct format_field *field,
6061 const char *name, struct pevent_record *record,
6062 unsigned long long *val, int err)
6066 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6070 if (pevent_read_number_field(field, record->data, val)) {
6072 trace_seq_printf(s, " %s=INVALID", name);
6080 * pevent_get_field_raw - return the raw pointer into the data field
6081 * @s: The seq to print to on error
6082 * @event: the event that the field is for
6083 * @name: The name of the field
6084 * @record: The record with the field name.
6085 * @len: place to store the field length.
6086 * @err: print default error if failed.
6088 * Returns a pointer into record->data of the field and places
6089 * the length of the field in @len.
6091 * On failure, it returns NULL.
6093 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
6094 const char *name, struct pevent_record *record,
6097 struct format_field *field;
6098 void *data = record->data;
6105 field = pevent_find_field(event, name);
6109 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6113 /* Allow @len to be NULL */
6117 offset = field->offset;
6118 if (field->flags & FIELD_IS_DYNAMIC) {
6119 offset = pevent_read_number(event->pevent,
6120 data + offset, field->size);
6121 *len = offset >> 16;
6126 return data + offset;
6130 * pevent_get_field_val - find a field and return its value
6131 * @s: The seq to print to on error
6132 * @event: the event that the field is for
6133 * @name: The name of the field
6134 * @record: The record with the field name.
6135 * @val: place to store the value of the field.
6136 * @err: print default error if failed.
6138 * Returns 0 on success -1 on field not found.
6140 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
6141 const char *name, struct pevent_record *record,
6142 unsigned long long *val, int err)
6144 struct format_field *field;
6149 field = pevent_find_field(event, name);
6151 return get_field_val(s, field, name, record, val, err);
6155 * pevent_get_common_field_val - find a common field and return its value
6156 * @s: The seq to print to on error
6157 * @event: the event that the field is for
6158 * @name: The name of the field
6159 * @record: The record with the field name.
6160 * @val: place to store the value of the field.
6161 * @err: print default error if failed.
6163 * Returns 0 on success -1 on field not found.
6165 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
6166 const char *name, struct pevent_record *record,
6167 unsigned long long *val, int err)
6169 struct format_field *field;
6174 field = pevent_find_common_field(event, name);
6176 return get_field_val(s, field, name, record, val, err);
6180 * pevent_get_any_field_val - find a any field and return its value
6181 * @s: The seq to print to on error
6182 * @event: the event that the field is for
6183 * @name: The name of the field
6184 * @record: The record with the field name.
6185 * @val: place to store the value of the field.
6186 * @err: print default error if failed.
6188 * Returns 0 on success -1 on field not found.
6190 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
6191 const char *name, struct pevent_record *record,
6192 unsigned long long *val, int err)
6194 struct format_field *field;
6199 field = pevent_find_any_field(event, name);
6201 return get_field_val(s, field, name, record, val, err);
6205 * pevent_print_num_field - print a field and a format
6206 * @s: The seq to print to
6207 * @fmt: The printf format to print the field with.
6208 * @event: the event that the field is for
6209 * @name: The name of the field
6210 * @record: The record with the field name.
6211 * @err: print default error if failed.
6213 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6215 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
6216 struct event_format *event, const char *name,
6217 struct pevent_record *record, int err)
6219 struct format_field *field = pevent_find_field(event, name);
6220 unsigned long long val;
6225 if (pevent_read_number_field(field, record->data, &val))
6228 return trace_seq_printf(s, fmt, val);
6232 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6237 * pevent_print_func_field - print a field and a format for function pointers
6238 * @s: The seq to print to
6239 * @fmt: The printf format to print the field with.
6240 * @event: the event that the field is for
6241 * @name: The name of the field
6242 * @record: The record with the field name.
6243 * @err: print default error if failed.
6245 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6247 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
6248 struct event_format *event, const char *name,
6249 struct pevent_record *record, int err)
6251 struct format_field *field = pevent_find_field(event, name);
6252 struct pevent *pevent = event->pevent;
6253 unsigned long long val;
6254 struct func_map *func;
6260 if (pevent_read_number_field(field, record->data, &val))
6263 func = find_func(pevent, val);
6266 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6268 sprintf(tmp, "0x%08llx", val);
6270 return trace_seq_printf(s, fmt, tmp);
6274 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6278 static void free_func_handle(struct pevent_function_handler *func)
6280 struct pevent_func_params *params;
6284 while (func->params) {
6285 params = func->params;
6286 func->params = params->next;
6294 * pevent_register_print_function - register a helper function
6295 * @pevent: the handle to the pevent
6296 * @func: the function to process the helper function
6297 * @ret_type: the return type of the helper function
6298 * @name: the name of the helper function
6299 * @parameters: A list of enum pevent_func_arg_type
6301 * Some events may have helper functions in the print format arguments.
6302 * This allows a plugin to dynamically create a way to process one
6303 * of these functions.
6305 * The @parameters is a variable list of pevent_func_arg_type enums that
6306 * must end with PEVENT_FUNC_ARG_VOID.
6308 int pevent_register_print_function(struct pevent *pevent,
6309 pevent_func_handler func,
6310 enum pevent_func_arg_type ret_type,
6313 struct pevent_function_handler *func_handle;
6314 struct pevent_func_params **next_param;
6315 struct pevent_func_params *param;
6316 enum pevent_func_arg_type type;
6320 func_handle = find_func_handler(pevent, name);
6323 * This is most like caused by the users own
6324 * plugins updating the function. This overrides the
6327 pr_stat("override of function helper '%s'", name);
6328 remove_func_handler(pevent, name);
6331 func_handle = calloc(1, sizeof(*func_handle));
6333 do_warning("Failed to allocate function handler");
6334 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6337 func_handle->ret_type = ret_type;
6338 func_handle->name = strdup(name);
6339 func_handle->func = func;
6340 if (!func_handle->name) {
6341 do_warning("Failed to allocate function name");
6343 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6346 next_param = &(func_handle->params);
6349 type = va_arg(ap, enum pevent_func_arg_type);
6350 if (type == PEVENT_FUNC_ARG_VOID)
6353 if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
6354 do_warning("Invalid argument type %d", type);
6355 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
6359 param = malloc(sizeof(*param));
6361 do_warning("Failed to allocate function param");
6362 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6368 *next_param = param;
6369 next_param = &(param->next);
6371 func_handle->nr_args++;
6375 func_handle->next = pevent->func_handlers;
6376 pevent->func_handlers = func_handle;
6381 free_func_handle(func_handle);
6386 * pevent_unregister_print_function - unregister a helper function
6387 * @pevent: the handle to the pevent
6388 * @func: the function to process the helper function
6389 * @name: the name of the helper function
6391 * This function removes existing print handler for function @name.
6393 * Returns 0 if the handler was removed successully, -1 otherwise.
6395 int pevent_unregister_print_function(struct pevent *pevent,
6396 pevent_func_handler func, char *name)
6398 struct pevent_function_handler *func_handle;
6400 func_handle = find_func_handler(pevent, name);
6401 if (func_handle && func_handle->func == func) {
6402 remove_func_handler(pevent, name);
6408 static struct event_format *pevent_search_event(struct pevent *pevent, int id,
6409 const char *sys_name,
6410 const char *event_name)
6412 struct event_format *event;
6416 event = pevent_find_event(pevent, id);
6419 if (event_name && (strcmp(event_name, event->name) != 0))
6421 if (sys_name && (strcmp(sys_name, event->system) != 0))
6424 event = pevent_find_event_by_name(pevent, sys_name, event_name);
6432 * pevent_register_event_handler - register a way to parse an event
6433 * @pevent: the handle to the pevent
6434 * @id: the id of the event to register
6435 * @sys_name: the system name the event belongs to
6436 * @event_name: the name of the event
6437 * @func: the function to call to parse the event information
6438 * @context: the data to be passed to @func
6440 * This function allows a developer to override the parsing of
6441 * a given event. If for some reason the default print format
6442 * is not sufficient, this function will register a function
6443 * for an event to be used to parse the data instead.
6445 * If @id is >= 0, then it is used to find the event.
6446 * else @sys_name and @event_name are used.
6448 int pevent_register_event_handler(struct pevent *pevent, int id,
6449 const char *sys_name, const char *event_name,
6450 pevent_event_handler_func func, void *context)
6452 struct event_format *event;
6453 struct event_handler *handle;
6455 event = pevent_search_event(pevent, id, sys_name, event_name);
6459 pr_stat("overriding event (%d) %s:%s with new print handler",
6460 event->id, event->system, event->name);
6462 event->handler = func;
6463 event->context = context;
6467 /* Save for later use. */
6468 handle = calloc(1, sizeof(*handle));
6470 do_warning("Failed to allocate event handler");
6471 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6476 handle->event_name = strdup(event_name);
6478 handle->sys_name = strdup(sys_name);
6480 if ((event_name && !handle->event_name) ||
6481 (sys_name && !handle->sys_name)) {
6482 do_warning("Failed to allocate event/sys name");
6483 free((void *)handle->event_name);
6484 free((void *)handle->sys_name);
6486 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6489 handle->func = func;
6490 handle->next = pevent->handlers;
6491 pevent->handlers = handle;
6492 handle->context = context;
6497 static int handle_matches(struct event_handler *handler, int id,
6498 const char *sys_name, const char *event_name,
6499 pevent_event_handler_func func, void *context)
6501 if (id >= 0 && id != handler->id)
6504 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6507 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6510 if (func != handler->func || context != handler->context)
6517 * pevent_unregister_event_handler - unregister an existing event handler
6518 * @pevent: the handle to the pevent
6519 * @id: the id of the event to unregister
6520 * @sys_name: the system name the handler belongs to
6521 * @event_name: the name of the event handler
6522 * @func: the function to call to parse the event information
6523 * @context: the data to be passed to @func
6525 * This function removes existing event handler (parser).
6527 * If @id is >= 0, then it is used to find the event.
6528 * else @sys_name and @event_name are used.
6530 * Returns 0 if handler was removed successfully, -1 if event was not found.
6532 int pevent_unregister_event_handler(struct pevent *pevent, int id,
6533 const char *sys_name, const char *event_name,
6534 pevent_event_handler_func func, void *context)
6536 struct event_format *event;
6537 struct event_handler *handle;
6538 struct event_handler **next;
6540 event = pevent_search_event(pevent, id, sys_name, event_name);
6544 if (event->handler == func && event->context == context) {
6545 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6546 event->id, event->system, event->name);
6548 event->handler = NULL;
6549 event->context = NULL;
6554 for (next = &pevent->handlers; *next; next = &(*next)->next) {
6556 if (handle_matches(handle, id, sys_name, event_name,
6564 *next = handle->next;
6565 free_handler(handle);
6571 * pevent_alloc - create a pevent handle
6573 struct pevent *pevent_alloc(void)
6575 struct pevent *pevent = calloc(1, sizeof(*pevent));
6578 pevent->ref_count = 1;
6583 void pevent_ref(struct pevent *pevent)
6585 pevent->ref_count++;
6588 void pevent_free_format_field(struct format_field *field)
6591 if (field->alias != field->name)
6597 static void free_format_fields(struct format_field *field)
6599 struct format_field *next;
6603 pevent_free_format_field(field);
6608 static void free_formats(struct format *format)
6610 free_format_fields(format->common_fields);
6611 free_format_fields(format->fields);
6614 void pevent_free_format(struct event_format *event)
6617 free(event->system);
6619 free_formats(&event->format);
6621 free(event->print_fmt.format);
6622 free_args(event->print_fmt.args);
6628 * pevent_free - free a pevent handle
6629 * @pevent: the pevent handle to free
6631 void pevent_free(struct pevent *pevent)
6633 struct cmdline_list *cmdlist, *cmdnext;
6634 struct func_list *funclist, *funcnext;
6635 struct printk_list *printklist, *printknext;
6636 struct pevent_function_handler *func_handler;
6637 struct event_handler *handle;
6643 cmdlist = pevent->cmdlist;
6644 funclist = pevent->funclist;
6645 printklist = pevent->printklist;
6647 pevent->ref_count--;
6648 if (pevent->ref_count)
6651 if (pevent->cmdlines) {
6652 for (i = 0; i < pevent->cmdline_count; i++)
6653 free(pevent->cmdlines[i].comm);
6654 free(pevent->cmdlines);
6658 cmdnext = cmdlist->next;
6659 free(cmdlist->comm);
6664 if (pevent->func_map) {
6665 for (i = 0; i < (int)pevent->func_count; i++) {
6666 free(pevent->func_map[i].func);
6667 free(pevent->func_map[i].mod);
6669 free(pevent->func_map);
6673 funcnext = funclist->next;
6674 free(funclist->func);
6675 free(funclist->mod);
6677 funclist = funcnext;
6680 while (pevent->func_handlers) {
6681 func_handler = pevent->func_handlers;
6682 pevent->func_handlers = func_handler->next;
6683 free_func_handle(func_handler);
6686 if (pevent->printk_map) {
6687 for (i = 0; i < (int)pevent->printk_count; i++)
6688 free(pevent->printk_map[i].printk);
6689 free(pevent->printk_map);
6692 while (printklist) {
6693 printknext = printklist->next;
6694 free(printklist->printk);
6696 printklist = printknext;
6699 for (i = 0; i < pevent->nr_events; i++)
6700 pevent_free_format(pevent->events[i]);
6702 while (pevent->handlers) {
6703 handle = pevent->handlers;
6704 pevent->handlers = handle->next;
6705 free_handler(handle);
6708 free(pevent->trace_clock);
6709 free(pevent->events);
6710 free(pevent->sort_events);
6711 free(pevent->func_resolver);
6716 void pevent_unref(struct pevent *pevent)
6718 pevent_free(pevent);