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 ||
1960 strcmp(token, "!=") == 0) {
1966 /* copy the top arg to the left */
1969 arg->type = PRINT_OP;
1971 arg->op.left = left;
1972 arg->op.right = NULL;
1974 if (set_op_prio(arg) == -1) {
1975 event->flags |= EVENT_FL_FAILED;
1976 /* arg->op.op (= token) will be freed at out_free */
1981 type = read_token_item(&token);
1984 /* could just be a type pointer */
1985 if ((strcmp(arg->op.op, "*") == 0) &&
1986 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1989 if (left->type != PRINT_ATOM) {
1990 do_warning_event(event, "bad pointer type");
1993 new_atom = realloc(left->atom.atom,
1994 strlen(left->atom.atom) + 3);
1998 left->atom.atom = new_atom;
1999 strcat(left->atom.atom, " *");
2007 right = alloc_arg();
2011 type = process_arg_token(event, right, tok, type);
2012 if (type == EVENT_ERROR) {
2014 /* token was freed in process_arg_token() via *tok */
2019 if (right->type == PRINT_OP &&
2020 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2021 struct print_arg tmp;
2023 /* rotate ops according to the priority */
2024 arg->op.right = right->op.left;
2030 arg->op.left = right;
2032 arg->op.right = right;
2035 } else if (strcmp(token, "[") == 0) {
2043 arg->type = PRINT_OP;
2045 arg->op.left = left;
2049 /* it will set arg->op.right */
2050 type = process_array(event, arg, tok);
2053 do_warning_event(event, "unknown op '%s'", token);
2054 event->flags |= EVENT_FL_FAILED;
2055 /* the arg is now the left side */
2059 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
2062 /* higher prios need to be closer to the root */
2063 prio = get_op_prio(*tok);
2065 if (prio > arg->op.prio)
2066 return process_op(event, arg, tok);
2068 return process_op(event, right, tok);
2074 do_warning_event(event, "%s: not enough memory!", __func__);
2081 static enum event_type
2082 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
2085 enum event_type type;
2089 if (read_expected(EVENT_OP, "->") < 0)
2092 if (read_expect_type(EVENT_ITEM, &token) < 0)
2096 arg->type = PRINT_FIELD;
2097 arg->field.name = field;
2099 if (is_flag_field) {
2100 arg->field.field = pevent_find_any_field(event, arg->field.name);
2101 arg->field.field->flags |= FIELD_IS_FLAG;
2103 } else if (is_symbolic_field) {
2104 arg->field.field = pevent_find_any_field(event, arg->field.name);
2105 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
2106 is_symbolic_field = 0;
2109 type = read_token(&token);
2121 static int alloc_and_process_delim(struct event_format *event, char *next_token,
2122 struct print_arg **print_arg)
2124 struct print_arg *field;
2125 enum event_type type;
2129 field = alloc_arg();
2131 do_warning_event(event, "%s: not enough memory!", __func__);
2136 type = process_arg(event, field, &token);
2138 if (test_type_token(type, token, EVENT_DELIM, next_token)) {
2142 goto out_free_token;
2153 static char *arg_eval (struct print_arg *arg);
2155 static unsigned long long
2156 eval_type_str(unsigned long long val, const char *type, int pointer)
2166 if (type[len-1] != '*') {
2167 do_warning("pointer expected with non pointer type");
2173 do_warning("%s: not enough memory!", __func__);
2176 memcpy(ref, type, len);
2178 /* chop off the " *" */
2181 val = eval_type_str(val, ref, 0);
2186 /* check if this is a pointer */
2187 if (type[len - 1] == '*')
2190 /* Try to figure out the arg size*/
2191 if (strncmp(type, "struct", 6) == 0)
2195 if (strcmp(type, "u8") == 0)
2198 if (strcmp(type, "u16") == 0)
2199 return val & 0xffff;
2201 if (strcmp(type, "u32") == 0)
2202 return val & 0xffffffff;
2204 if (strcmp(type, "u64") == 0 ||
2205 strcmp(type, "s64"))
2208 if (strcmp(type, "s8") == 0)
2209 return (unsigned long long)(char)val & 0xff;
2211 if (strcmp(type, "s16") == 0)
2212 return (unsigned long long)(short)val & 0xffff;
2214 if (strcmp(type, "s32") == 0)
2215 return (unsigned long long)(int)val & 0xffffffff;
2217 if (strncmp(type, "unsigned ", 9) == 0) {
2222 if (strcmp(type, "char") == 0) {
2224 return (unsigned long long)(char)val & 0xff;
2229 if (strcmp(type, "short") == 0) {
2231 return (unsigned long long)(short)val & 0xffff;
2233 return val & 0xffff;
2236 if (strcmp(type, "int") == 0) {
2238 return (unsigned long long)(int)val & 0xffffffff;
2240 return val & 0xffffffff;
2247 * Try to figure out the type.
2249 static unsigned long long
2250 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
2252 if (arg->type != PRINT_TYPE) {
2253 do_warning("expected type argument");
2257 return eval_type_str(val, arg->typecast.type, pointer);
2260 static int arg_num_eval(struct print_arg *arg, long long *val)
2262 long long left, right;
2265 switch (arg->type) {
2267 *val = strtoll(arg->atom.atom, NULL, 0);
2270 ret = arg_num_eval(arg->typecast.item, val);
2273 *val = eval_type(*val, arg, 0);
2276 switch (arg->op.op[0]) {
2278 ret = arg_num_eval(arg->op.left, &left);
2281 ret = arg_num_eval(arg->op.right, &right);
2285 *val = left || right;
2287 *val = left | right;
2290 ret = arg_num_eval(arg->op.left, &left);
2293 ret = arg_num_eval(arg->op.right, &right);
2297 *val = left && right;
2299 *val = left & right;
2302 ret = arg_num_eval(arg->op.left, &left);
2305 ret = arg_num_eval(arg->op.right, &right);
2308 switch (arg->op.op[1]) {
2310 *val = left < right;
2313 *val = left << right;
2316 *val = left <= right;
2319 do_warning("unknown op '%s'", arg->op.op);
2324 ret = arg_num_eval(arg->op.left, &left);
2327 ret = arg_num_eval(arg->op.right, &right);
2330 switch (arg->op.op[1]) {
2332 *val = left > right;
2335 *val = left >> right;
2338 *val = left >= right;
2341 do_warning("unknown op '%s'", arg->op.op);
2346 ret = arg_num_eval(arg->op.left, &left);
2349 ret = arg_num_eval(arg->op.right, &right);
2353 if (arg->op.op[1] != '=') {
2354 do_warning("unknown op '%s'", arg->op.op);
2357 *val = left == right;
2360 ret = arg_num_eval(arg->op.left, &left);
2363 ret = arg_num_eval(arg->op.right, &right);
2367 switch (arg->op.op[1]) {
2369 *val = left != right;
2372 do_warning("unknown op '%s'", arg->op.op);
2377 /* check for negative */
2378 if (arg->op.left->type == PRINT_NULL)
2381 ret = arg_num_eval(arg->op.left, &left);
2384 ret = arg_num_eval(arg->op.right, &right);
2387 *val = left - right;
2390 if (arg->op.left->type == PRINT_NULL)
2393 ret = arg_num_eval(arg->op.left, &left);
2396 ret = arg_num_eval(arg->op.right, &right);
2399 *val = left + right;
2402 do_warning("unknown op '%s'", arg->op.op);
2408 case PRINT_FIELD ... PRINT_SYMBOL:
2413 do_warning("invalid eval type %d", arg->type);
2420 static char *arg_eval (struct print_arg *arg)
2423 static char buf[20];
2425 switch (arg->type) {
2427 return arg->atom.atom;
2429 return arg_eval(arg->typecast.item);
2431 if (!arg_num_eval(arg, &val))
2433 sprintf(buf, "%lld", val);
2437 case PRINT_FIELD ... PRINT_SYMBOL:
2442 do_warning("invalid eval type %d", arg->type);
2449 static enum event_type
2450 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2452 enum event_type type;
2453 struct print_arg *arg = NULL;
2454 struct print_flag_sym *field;
2460 type = read_token_item(&token);
2461 if (test_type_token(type, token, EVENT_OP, "{"))
2469 type = process_arg(event, arg, &token);
2471 if (type == EVENT_OP)
2472 type = process_op(event, arg, &token);
2474 if (type == EVENT_ERROR)
2477 if (test_type_token(type, token, EVENT_DELIM, ","))
2480 field = calloc(1, sizeof(*field));
2484 value = arg_eval(arg);
2486 goto out_free_field;
2487 field->value = strdup(value);
2488 if (field->value == NULL)
2489 goto out_free_field;
2497 type = process_arg(event, arg, &token);
2498 if (test_type_token(type, token, EVENT_OP, "}"))
2499 goto out_free_field;
2501 value = arg_eval(arg);
2503 goto out_free_field;
2504 field->str = strdup(value);
2505 if (field->str == NULL)
2506 goto out_free_field;
2511 list = &field->next;
2514 type = read_token_item(&token);
2515 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2521 free_flag_sym(field);
2530 static enum event_type
2531 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2533 struct print_arg *field;
2534 enum event_type type;
2537 memset(arg, 0, sizeof(*arg));
2538 arg->type = PRINT_FLAGS;
2540 field = alloc_arg();
2542 do_warning_event(event, "%s: not enough memory!", __func__);
2546 type = process_field_arg(event, field, &token);
2548 /* Handle operations in the first argument */
2549 while (type == EVENT_OP)
2550 type = process_op(event, field, &token);
2552 if (test_type_token(type, token, EVENT_DELIM, ","))
2553 goto out_free_field;
2556 arg->flags.field = field;
2558 type = read_token_item(&token);
2559 if (event_item_type(type)) {
2560 arg->flags.delim = token;
2561 type = read_token_item(&token);
2564 if (test_type_token(type, token, EVENT_DELIM, ","))
2567 type = process_fields(event, &arg->flags.flags, &token);
2568 if (test_type_token(type, token, EVENT_DELIM, ")"))
2572 type = read_token_item(tok);
2583 static enum event_type
2584 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2586 struct print_arg *field;
2587 enum event_type type;
2590 memset(arg, 0, sizeof(*arg));
2591 arg->type = PRINT_SYMBOL;
2593 field = alloc_arg();
2595 do_warning_event(event, "%s: not enough memory!", __func__);
2599 type = process_field_arg(event, field, &token);
2601 if (test_type_token(type, token, EVENT_DELIM, ","))
2602 goto out_free_field;
2604 arg->symbol.field = field;
2606 type = process_fields(event, &arg->symbol.symbols, &token);
2607 if (test_type_token(type, token, EVENT_DELIM, ")"))
2611 type = read_token_item(tok);
2622 static enum event_type
2623 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2625 memset(arg, 0, sizeof(*arg));
2626 arg->type = PRINT_HEX;
2628 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2631 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2634 return read_token_item(tok);
2637 free_arg(arg->hex.field);
2638 arg->hex.field = NULL;
2644 static enum event_type
2645 process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
2647 memset(arg, 0, sizeof(*arg));
2648 arg->type = PRINT_INT_ARRAY;
2650 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2653 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2656 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2659 return read_token_item(tok);
2662 free_arg(arg->int_array.count);
2663 arg->int_array.count = NULL;
2665 free_arg(arg->int_array.field);
2666 arg->int_array.field = NULL;
2672 static enum event_type
2673 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2675 struct format_field *field;
2676 enum event_type type;
2679 memset(arg, 0, sizeof(*arg));
2680 arg->type = PRINT_DYNAMIC_ARRAY;
2683 * The item within the parenthesis is another field that holds
2684 * the index into where the array starts.
2686 type = read_token(&token);
2688 if (type != EVENT_ITEM)
2691 /* Find the field */
2693 field = pevent_find_field(event, token);
2697 arg->dynarray.field = field;
2698 arg->dynarray.index = 0;
2700 if (read_expected(EVENT_DELIM, ")") < 0)
2704 type = read_token_item(&token);
2706 if (type != EVENT_OP || strcmp(token, "[") != 0)
2712 do_warning_event(event, "%s: not enough memory!", __func__);
2717 type = process_arg(event, arg, &token);
2718 if (type == EVENT_ERROR)
2721 if (!test_type_token(type, token, EVENT_OP, "]"))
2725 type = read_token_item(tok);
2736 static enum event_type
2737 process_dynamic_array_len(struct event_format *event, struct print_arg *arg,
2740 struct format_field *field;
2741 enum event_type type;
2744 if (read_expect_type(EVENT_ITEM, &token) < 0)
2747 arg->type = PRINT_DYNAMIC_ARRAY_LEN;
2749 /* Find the field */
2750 field = pevent_find_field(event, token);
2754 arg->dynarray.field = field;
2755 arg->dynarray.index = 0;
2757 if (read_expected(EVENT_DELIM, ")") < 0)
2760 type = read_token(&token);
2772 static enum event_type
2773 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2775 struct print_arg *item_arg;
2776 enum event_type type;
2779 type = process_arg(event, arg, &token);
2781 if (type == EVENT_ERROR)
2784 if (type == EVENT_OP)
2785 type = process_op(event, arg, &token);
2787 if (type == EVENT_ERROR)
2790 if (test_type_token(type, token, EVENT_DELIM, ")"))
2794 type = read_token_item(&token);
2797 * If the next token is an item or another open paren, then
2798 * this was a typecast.
2800 if (event_item_type(type) ||
2801 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2803 /* make this a typecast and contine */
2805 /* prevous must be an atom */
2806 if (arg->type != PRINT_ATOM) {
2807 do_warning_event(event, "previous needed to be PRINT_ATOM");
2811 item_arg = alloc_arg();
2813 do_warning_event(event, "%s: not enough memory!",
2818 arg->type = PRINT_TYPE;
2819 arg->typecast.type = arg->atom.atom;
2820 arg->typecast.item = item_arg;
2821 type = process_arg_token(event, item_arg, &token, type);
2835 static enum event_type
2836 process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
2839 enum event_type type;
2842 if (read_expect_type(EVENT_ITEM, &token) < 0)
2845 arg->type = PRINT_STRING;
2846 arg->string.string = token;
2847 arg->string.offset = -1;
2849 if (read_expected(EVENT_DELIM, ")") < 0)
2852 type = read_token(&token);
2864 static enum event_type
2865 process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
2868 enum event_type type;
2871 if (read_expect_type(EVENT_ITEM, &token) < 0)
2874 arg->type = PRINT_BITMASK;
2875 arg->bitmask.bitmask = token;
2876 arg->bitmask.offset = -1;
2878 if (read_expected(EVENT_DELIM, ")") < 0)
2881 type = read_token(&token);
2893 static struct pevent_function_handler *
2894 find_func_handler(struct pevent *pevent, char *func_name)
2896 struct pevent_function_handler *func;
2901 for (func = pevent->func_handlers; func; func = func->next) {
2902 if (strcmp(func->name, func_name) == 0)
2909 static void remove_func_handler(struct pevent *pevent, char *func_name)
2911 struct pevent_function_handler *func;
2912 struct pevent_function_handler **next;
2914 next = &pevent->func_handlers;
2915 while ((func = *next)) {
2916 if (strcmp(func->name, func_name) == 0) {
2918 free_func_handle(func);
2925 static enum event_type
2926 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2927 struct print_arg *arg, char **tok)
2929 struct print_arg **next_arg;
2930 struct print_arg *farg;
2931 enum event_type type;
2935 arg->type = PRINT_FUNC;
2936 arg->func.func = func;
2940 next_arg = &(arg->func.args);
2941 for (i = 0; i < func->nr_args; i++) {
2944 do_warning_event(event, "%s: not enough memory!",
2949 type = process_arg(event, farg, &token);
2950 if (i < (func->nr_args - 1)) {
2951 if (type != EVENT_DELIM || strcmp(token, ",") != 0) {
2952 do_warning_event(event,
2953 "Error: function '%s()' expects %d arguments but event %s only uses %d",
2954 func->name, func->nr_args,
2955 event->name, i + 1);
2959 if (type != EVENT_DELIM || strcmp(token, ")") != 0) {
2960 do_warning_event(event,
2961 "Error: function '%s()' only expects %d arguments but event %s has more",
2962 func->name, func->nr_args, event->name);
2968 next_arg = &(farg->next);
2972 type = read_token(&token);
2983 static enum event_type
2984 process_function(struct event_format *event, struct print_arg *arg,
2985 char *token, char **tok)
2987 struct pevent_function_handler *func;
2989 if (strcmp(token, "__print_flags") == 0) {
2992 return process_flags(event, arg, tok);
2994 if (strcmp(token, "__print_symbolic") == 0) {
2996 is_symbolic_field = 1;
2997 return process_symbols(event, arg, tok);
2999 if (strcmp(token, "__print_hex") == 0) {
3001 return process_hex(event, arg, tok);
3003 if (strcmp(token, "__print_array") == 0) {
3005 return process_int_array(event, arg, tok);
3007 if (strcmp(token, "__get_str") == 0) {
3009 return process_str(event, arg, tok);
3011 if (strcmp(token, "__get_bitmask") == 0) {
3013 return process_bitmask(event, arg, tok);
3015 if (strcmp(token, "__get_dynamic_array") == 0) {
3017 return process_dynamic_array(event, arg, tok);
3019 if (strcmp(token, "__get_dynamic_array_len") == 0) {
3021 return process_dynamic_array_len(event, arg, tok);
3024 func = find_func_handler(event->pevent, token);
3027 return process_func_handler(event, func, arg, tok);
3030 do_warning_event(event, "function %s not defined", token);
3035 static enum event_type
3036 process_arg_token(struct event_format *event, struct print_arg *arg,
3037 char **tok, enum event_type type)
3046 if (strcmp(token, "REC") == 0) {
3048 type = process_entry(event, arg, &token);
3052 /* test the next token */
3053 type = read_token_item(&token);
3056 * If the next token is a parenthesis, then this
3059 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
3062 /* this will free atom. */
3063 type = process_function(event, arg, atom, &token);
3066 /* atoms can be more than one token long */
3067 while (type == EVENT_ITEM) {
3069 new_atom = realloc(atom,
3070 strlen(atom) + strlen(token) + 2);
3079 strcat(atom, token);
3081 type = read_token_item(&token);
3084 arg->type = PRINT_ATOM;
3085 arg->atom.atom = atom;
3090 arg->type = PRINT_ATOM;
3091 arg->atom.atom = token;
3092 type = read_token_item(&token);
3095 if (strcmp(token, "(") == 0) {
3097 type = process_paren(event, arg, &token);
3101 /* handle single ops */
3102 arg->type = PRINT_OP;
3104 arg->op.left = NULL;
3105 type = process_op(event, arg, &token);
3107 /* On error, the op is freed */
3108 if (type == EVENT_ERROR)
3111 /* return error type if errored */
3114 case EVENT_ERROR ... EVENT_NEWLINE:
3116 do_warning_event(event, "unexpected type %d", type);
3124 static int event_read_print_args(struct event_format *event, struct print_arg **list)
3126 enum event_type type = EVENT_ERROR;
3127 struct print_arg *arg;
3132 if (type == EVENT_NEWLINE) {
3133 type = read_token_item(&token);
3139 do_warning_event(event, "%s: not enough memory!",
3144 type = process_arg(event, arg, &token);
3146 if (type == EVENT_ERROR) {
3155 if (type == EVENT_OP) {
3156 type = process_op(event, arg, &token);
3158 if (type == EVENT_ERROR) {
3167 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
3174 } while (type != EVENT_NONE);
3176 if (type != EVENT_NONE && type != EVENT_ERROR)
3182 static int event_read_print(struct event_format *event)
3184 enum event_type type;
3188 if (read_expected_item(EVENT_ITEM, "print") < 0)
3191 if (read_expected(EVENT_ITEM, "fmt") < 0)
3194 if (read_expected(EVENT_OP, ":") < 0)
3197 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
3201 event->print_fmt.format = token;
3202 event->print_fmt.args = NULL;
3204 /* ok to have no arg */
3205 type = read_token_item(&token);
3207 if (type == EVENT_NONE)
3210 /* Handle concatenation of print lines */
3211 if (type == EVENT_DQUOTE) {
3214 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
3217 free_token(event->print_fmt.format);
3218 event->print_fmt.format = NULL;
3223 if (test_type_token(type, token, EVENT_DELIM, ","))
3228 ret = event_read_print_args(event, &event->print_fmt.args);
3240 * pevent_find_common_field - return a common field by event
3241 * @event: handle for the event
3242 * @name: the name of the common field to return
3244 * Returns a common field from the event by the given @name.
3245 * This only searchs the common fields and not all field.
3247 struct format_field *
3248 pevent_find_common_field(struct event_format *event, const char *name)
3250 struct format_field *format;
3252 for (format = event->format.common_fields;
3253 format; format = format->next) {
3254 if (strcmp(format->name, name) == 0)
3262 * pevent_find_field - find a non-common field
3263 * @event: handle for the event
3264 * @name: the name of the non-common field
3266 * Returns a non-common field by the given @name.
3267 * This does not search common fields.
3269 struct format_field *
3270 pevent_find_field(struct event_format *event, const char *name)
3272 struct format_field *format;
3274 for (format = event->format.fields;
3275 format; format = format->next) {
3276 if (strcmp(format->name, name) == 0)
3284 * pevent_find_any_field - find any field by name
3285 * @event: handle for the event
3286 * @name: the name of the field
3288 * Returns a field by the given @name.
3289 * This searchs the common field names first, then
3290 * the non-common ones if a common one was not found.
3292 struct format_field *
3293 pevent_find_any_field(struct event_format *event, const char *name)
3295 struct format_field *format;
3297 format = pevent_find_common_field(event, name);
3300 return pevent_find_field(event, name);
3304 * pevent_read_number - read a number from data
3305 * @pevent: handle for the pevent
3306 * @ptr: the raw data
3307 * @size: the size of the data that holds the number
3309 * Returns the number (converted to host) from the
3312 unsigned long long pevent_read_number(struct pevent *pevent,
3313 const void *ptr, int size)
3317 return *(unsigned char *)ptr;
3319 return data2host2(pevent, ptr);
3321 return data2host4(pevent, ptr);
3323 return data2host8(pevent, ptr);
3331 * pevent_read_number_field - read a number from data
3332 * @field: a handle to the field
3333 * @data: the raw data to read
3334 * @value: the value to place the number in
3336 * Reads raw data according to a field offset and size,
3337 * and translates it into @value.
3339 * Returns 0 on success, -1 otherwise.
3341 int pevent_read_number_field(struct format_field *field, const void *data,
3342 unsigned long long *value)
3346 switch (field->size) {
3351 *value = pevent_read_number(field->event->pevent,
3352 data + field->offset, field->size);
3359 static int get_common_info(struct pevent *pevent,
3360 const char *type, int *offset, int *size)
3362 struct event_format *event;
3363 struct format_field *field;
3366 * All events should have the same common elements.
3367 * Pick any event to find where the type is;
3369 if (!pevent->events) {
3370 do_warning("no event_list!");
3374 event = pevent->events[0];
3375 field = pevent_find_common_field(event, type);
3379 *offset = field->offset;
3380 *size = field->size;
3385 static int __parse_common(struct pevent *pevent, void *data,
3386 int *size, int *offset, const char *name)
3391 ret = get_common_info(pevent, name, offset, size);
3395 return pevent_read_number(pevent, data + *offset, *size);
3398 static int trace_parse_common_type(struct pevent *pevent, void *data)
3400 return __parse_common(pevent, data,
3401 &pevent->type_size, &pevent->type_offset,
3405 static int parse_common_pid(struct pevent *pevent, void *data)
3407 return __parse_common(pevent, data,
3408 &pevent->pid_size, &pevent->pid_offset,
3412 static int parse_common_pc(struct pevent *pevent, void *data)
3414 return __parse_common(pevent, data,
3415 &pevent->pc_size, &pevent->pc_offset,
3416 "common_preempt_count");
3419 static int parse_common_flags(struct pevent *pevent, void *data)
3421 return __parse_common(pevent, data,
3422 &pevent->flags_size, &pevent->flags_offset,
3426 static int parse_common_lock_depth(struct pevent *pevent, void *data)
3428 return __parse_common(pevent, data,
3429 &pevent->ld_size, &pevent->ld_offset,
3430 "common_lock_depth");
3433 static int parse_common_migrate_disable(struct pevent *pevent, void *data)
3435 return __parse_common(pevent, data,
3436 &pevent->ld_size, &pevent->ld_offset,
3437 "common_migrate_disable");
3440 static int events_id_cmp(const void *a, const void *b);
3443 * pevent_find_event - find an event by given id
3444 * @pevent: a handle to the pevent
3445 * @id: the id of the event
3447 * Returns an event that has a given @id.
3449 struct event_format *pevent_find_event(struct pevent *pevent, int id)
3451 struct event_format **eventptr;
3452 struct event_format key;
3453 struct event_format *pkey = &key;
3455 /* Check cache first */
3456 if (pevent->last_event && pevent->last_event->id == id)
3457 return pevent->last_event;
3461 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
3462 sizeof(*pevent->events), events_id_cmp);
3465 pevent->last_event = *eventptr;
3473 * pevent_find_event_by_name - find an event by given name
3474 * @pevent: a handle to the pevent
3475 * @sys: the system name to search for
3476 * @name: the name of the event to search for
3478 * This returns an event with a given @name and under the system
3479 * @sys. If @sys is NULL the first event with @name is returned.
3481 struct event_format *
3482 pevent_find_event_by_name(struct pevent *pevent,
3483 const char *sys, const char *name)
3485 struct event_format *event;
3488 if (pevent->last_event &&
3489 strcmp(pevent->last_event->name, name) == 0 &&
3490 (!sys || strcmp(pevent->last_event->system, sys) == 0))
3491 return pevent->last_event;
3493 for (i = 0; i < pevent->nr_events; i++) {
3494 event = pevent->events[i];
3495 if (strcmp(event->name, name) == 0) {
3498 if (strcmp(event->system, sys) == 0)
3502 if (i == pevent->nr_events)
3505 pevent->last_event = event;
3509 static unsigned long long
3510 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
3512 struct pevent *pevent = event->pevent;
3513 unsigned long long val = 0;
3514 unsigned long long left, right;
3515 struct print_arg *typearg = NULL;
3516 struct print_arg *larg;
3517 unsigned long offset;
3518 unsigned int field_size;
3520 switch (arg->type) {
3525 return strtoull(arg->atom.atom, NULL, 0);
3527 if (!arg->field.field) {
3528 arg->field.field = pevent_find_any_field(event, arg->field.name);
3529 if (!arg->field.field)
3530 goto out_warning_field;
3533 /* must be a number */
3534 val = pevent_read_number(pevent, data + arg->field.field->offset,
3535 arg->field.field->size);
3539 case PRINT_INT_ARRAY:
3543 val = eval_num_arg(data, size, event, arg->typecast.item);
3544 return eval_type(val, arg, 0);
3552 val = process_defined_func(&s, data, size, event, arg);
3553 trace_seq_destroy(&s);
3557 if (strcmp(arg->op.op, "[") == 0) {
3559 * Arrays are special, since we don't want
3560 * to read the arg as is.
3562 right = eval_num_arg(data, size, event, arg->op.right);
3564 /* handle typecasts */
3565 larg = arg->op.left;
3566 while (larg->type == PRINT_TYPE) {
3569 larg = larg->typecast.item;
3572 /* Default to long size */
3573 field_size = pevent->long_size;
3575 switch (larg->type) {
3576 case PRINT_DYNAMIC_ARRAY:
3577 offset = pevent_read_number(pevent,
3578 data + larg->dynarray.field->offset,
3579 larg->dynarray.field->size);
3580 if (larg->dynarray.field->elementsize)
3581 field_size = larg->dynarray.field->elementsize;
3583 * The actual length of the dynamic array is stored
3584 * in the top half of the field, and the offset
3585 * is in the bottom half of the 32 bit field.
3591 if (!larg->field.field) {
3593 pevent_find_any_field(event, larg->field.name);
3594 if (!larg->field.field) {
3596 goto out_warning_field;
3599 field_size = larg->field.field->elementsize;
3600 offset = larg->field.field->offset +
3601 right * larg->field.field->elementsize;
3604 goto default_op; /* oops, all bets off */
3606 val = pevent_read_number(pevent,
3607 data + offset, field_size);
3609 val = eval_type(val, typearg, 1);
3611 } else if (strcmp(arg->op.op, "?") == 0) {
3612 left = eval_num_arg(data, size, event, arg->op.left);
3613 arg = arg->op.right;
3615 val = eval_num_arg(data, size, event, arg->op.left);
3617 val = eval_num_arg(data, size, event, arg->op.right);
3621 left = eval_num_arg(data, size, event, arg->op.left);
3622 right = eval_num_arg(data, size, event, arg->op.right);
3623 switch (arg->op.op[0]) {
3625 switch (arg->op.op[1]) {
3630 val = left != right;
3633 goto out_warning_op;
3641 val = left || right;
3647 val = left && right;
3652 switch (arg->op.op[1]) {
3657 val = left << right;
3660 val = left <= right;
3663 goto out_warning_op;
3667 switch (arg->op.op[1]) {
3672 val = left >> right;
3675 val = left >= right;
3678 goto out_warning_op;
3682 if (arg->op.op[1] != '=')
3683 goto out_warning_op;
3685 val = left == right;
3703 goto out_warning_op;
3706 case PRINT_DYNAMIC_ARRAY_LEN:
3707 offset = pevent_read_number(pevent,
3708 data + arg->dynarray.field->offset,
3709 arg->dynarray.field->size);
3711 * The total allocated length of the dynamic array is
3712 * stored in the top half of the field, and the offset
3713 * is in the bottom half of the 32 bit field.
3715 val = (unsigned long long)(offset >> 16);
3717 case PRINT_DYNAMIC_ARRAY:
3718 /* Without [], we pass the address to the dynamic data */
3719 offset = pevent_read_number(pevent,
3720 data + arg->dynarray.field->offset,
3721 arg->dynarray.field->size);
3723 * The total allocated length of the dynamic array is
3724 * stored in the top half of the field, and the offset
3725 * is in the bottom half of the 32 bit field.
3728 val = (unsigned long long)((unsigned long)data + offset);
3730 default: /* not sure what to do there */
3736 do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
3740 do_warning_event(event, "%s: field %s not found",
3741 __func__, arg->field.name);
3747 unsigned long long value;
3750 static const struct flag flags[] = {
3751 { "HI_SOFTIRQ", 0 },
3752 { "TIMER_SOFTIRQ", 1 },
3753 { "NET_TX_SOFTIRQ", 2 },
3754 { "NET_RX_SOFTIRQ", 3 },
3755 { "BLOCK_SOFTIRQ", 4 },
3756 { "IRQ_POLL_SOFTIRQ", 5 },
3757 { "TASKLET_SOFTIRQ", 6 },
3758 { "SCHED_SOFTIRQ", 7 },
3759 { "HRTIMER_SOFTIRQ", 8 },
3760 { "RCU_SOFTIRQ", 9 },
3762 { "HRTIMER_NORESTART", 0 },
3763 { "HRTIMER_RESTART", 1 },
3766 static long long eval_flag(const char *flag)
3771 * Some flags in the format files do not get converted.
3772 * If the flag is not numeric, see if it is something that
3773 * we already know about.
3775 if (isdigit(flag[0]))
3776 return strtoull(flag, NULL, 0);
3778 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3779 if (strcmp(flags[i].name, flag) == 0)
3780 return flags[i].value;
3785 static void print_str_to_seq(struct trace_seq *s, const char *format,
3786 int len_arg, const char *str)
3789 trace_seq_printf(s, format, len_arg, str);
3791 trace_seq_printf(s, format, str);
3794 static void print_bitmask_to_seq(struct pevent *pevent,
3795 struct trace_seq *s, const char *format,
3796 int len_arg, const void *data, int size)
3798 int nr_bits = size * 8;
3799 int str_size = (nr_bits + 3) / 4;
3807 * The kernel likes to put in commas every 32 bits, we
3810 str_size += (nr_bits - 1) / 32;
3812 str = malloc(str_size + 1);
3814 do_warning("%s: not enough memory!", __func__);
3819 /* Start out with -2 for the two chars per byte */
3820 for (i = str_size - 2; i >= 0; i -= 2) {
3822 * data points to a bit mask of size bytes.
3823 * In the kernel, this is an array of long words, thus
3824 * endianess is very important.
3826 if (pevent->file_bigendian)
3827 index = size - (len + 1);
3831 snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
3832 memcpy(str + i, buf, 2);
3834 if (!(len & 3) && i > 0) {
3841 trace_seq_printf(s, format, len_arg, str);
3843 trace_seq_printf(s, format, str);
3848 static void print_str_arg(struct trace_seq *s, void *data, int size,
3849 struct event_format *event, const char *format,
3850 int len_arg, struct print_arg *arg)
3852 struct pevent *pevent = event->pevent;
3853 struct print_flag_sym *flag;
3854 struct format_field *field;
3855 struct printk_map *printk;
3856 long long val, fval;
3857 unsigned long long addr;
3863 switch (arg->type) {
3868 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3871 field = arg->field.field;
3873 field = pevent_find_any_field(event, arg->field.name);
3875 str = arg->field.name;
3876 goto out_warning_field;
3878 arg->field.field = field;
3880 /* Zero sized fields, mean the rest of the data */
3881 len = field->size ? : size - field->offset;
3884 * Some events pass in pointers. If this is not an array
3885 * and the size is the same as long_size, assume that it
3888 if (!(field->flags & FIELD_IS_ARRAY) &&
3889 field->size == pevent->long_size) {
3891 /* Handle heterogeneous recording and processing
3895 * Traces recorded on 32-bit devices (32-bit
3896 * addressing) and processed on 64-bit devices:
3897 * In this case, only 32 bits should be read.
3900 * Traces recorded on 64 bit devices and processed
3901 * on 32-bit devices:
3902 * In this case, 64 bits must be read.
3904 addr = (pevent->long_size == 8) ?
3905 *(unsigned long long *)(data + field->offset) :
3906 (unsigned long long)*(unsigned int *)(data + field->offset);
3908 /* Check if it matches a print format */
3909 printk = find_printk(pevent, addr);
3911 trace_seq_puts(s, printk->printk);
3913 trace_seq_printf(s, "%llx", addr);
3916 str = malloc(len + 1);
3918 do_warning_event(event, "%s: not enough memory!",
3922 memcpy(str, data + field->offset, len);
3924 print_str_to_seq(s, format, len_arg, str);
3928 val = eval_num_arg(data, size, event, arg->flags.field);
3930 for (flag = arg->flags.flags; flag; flag = flag->next) {
3931 fval = eval_flag(flag->value);
3932 if (!val && fval < 0) {
3933 print_str_to_seq(s, format, len_arg, flag->str);
3936 if (fval > 0 && (val & fval) == fval) {
3937 if (print && arg->flags.delim)
3938 trace_seq_puts(s, arg->flags.delim);
3939 print_str_to_seq(s, format, len_arg, flag->str);
3946 val = eval_num_arg(data, size, event, arg->symbol.field);
3947 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3948 fval = eval_flag(flag->value);
3950 print_str_to_seq(s, format, len_arg, flag->str);
3956 if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
3957 unsigned long offset;
3958 offset = pevent_read_number(pevent,
3959 data + arg->hex.field->dynarray.field->offset,
3960 arg->hex.field->dynarray.field->size);
3961 hex = data + (offset & 0xffff);
3963 field = arg->hex.field->field.field;
3965 str = arg->hex.field->field.name;
3966 field = pevent_find_any_field(event, str);
3968 goto out_warning_field;
3969 arg->hex.field->field.field = field;
3971 hex = data + field->offset;
3973 len = eval_num_arg(data, size, event, arg->hex.size);
3974 for (i = 0; i < len; i++) {
3976 trace_seq_putc(s, ' ');
3977 trace_seq_printf(s, "%02x", hex[i]);
3981 case PRINT_INT_ARRAY: {
3985 if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
3986 unsigned long offset;
3987 struct format_field *field =
3988 arg->int_array.field->dynarray.field;
3989 offset = pevent_read_number(pevent,
3990 data + field->offset,
3992 num = data + (offset & 0xffff);
3994 field = arg->int_array.field->field.field;
3996 str = arg->int_array.field->field.name;
3997 field = pevent_find_any_field(event, str);
3999 goto out_warning_field;
4000 arg->int_array.field->field.field = field;
4002 num = data + field->offset;
4004 len = eval_num_arg(data, size, event, arg->int_array.count);
4005 el_size = eval_num_arg(data, size, event,
4006 arg->int_array.el_size);
4007 for (i = 0; i < len; i++) {
4009 trace_seq_putc(s, ' ');
4012 trace_seq_printf(s, "%u", *(uint8_t *)num);
4013 } else if (el_size == 2) {
4014 trace_seq_printf(s, "%u", *(uint16_t *)num);
4015 } else if (el_size == 4) {
4016 trace_seq_printf(s, "%u", *(uint32_t *)num);
4017 } else if (el_size == 8) {
4018 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4020 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4021 el_size, *(uint8_t *)num);
4031 case PRINT_STRING: {
4034 if (arg->string.offset == -1) {
4035 struct format_field *f;
4037 f = pevent_find_any_field(event, arg->string.string);
4038 arg->string.offset = f->offset;
4040 str_offset = data2host4(pevent, data + arg->string.offset);
4041 str_offset &= 0xffff;
4042 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4046 print_str_to_seq(s, format, len_arg, arg->string.string);
4048 case PRINT_BITMASK: {
4052 if (arg->bitmask.offset == -1) {
4053 struct format_field *f;
4055 f = pevent_find_any_field(event, arg->bitmask.bitmask);
4056 arg->bitmask.offset = f->offset;
4058 bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
4059 bitmask_size = bitmask_offset >> 16;
4060 bitmask_offset &= 0xffff;
4061 print_bitmask_to_seq(pevent, s, format, len_arg,
4062 data + bitmask_offset, bitmask_size);
4067 * The only op for string should be ? :
4069 if (arg->op.op[0] != '?')
4071 val = eval_num_arg(data, size, event, arg->op.left);
4073 print_str_arg(s, data, size, event,
4074 format, len_arg, arg->op.right->op.left);
4076 print_str_arg(s, data, size, event,
4077 format, len_arg, arg->op.right->op.right);
4080 process_defined_func(s, data, size, event, arg);
4090 do_warning_event(event, "%s: field %s not found",
4091 __func__, arg->field.name);
4094 static unsigned long long
4095 process_defined_func(struct trace_seq *s, void *data, int size,
4096 struct event_format *event, struct print_arg *arg)
4098 struct pevent_function_handler *func_handle = arg->func.func;
4099 struct pevent_func_params *param;
4100 unsigned long long *args;
4101 unsigned long long ret;
4102 struct print_arg *farg;
4103 struct trace_seq str;
4105 struct save_str *next;
4107 } *strings = NULL, *string;
4110 if (!func_handle->nr_args) {
4111 ret = (*func_handle->func)(s, NULL);
4115 farg = arg->func.args;
4116 param = func_handle->params;
4119 args = malloc(sizeof(*args) * func_handle->nr_args);
4123 for (i = 0; i < func_handle->nr_args; i++) {
4124 switch (param->type) {
4125 case PEVENT_FUNC_ARG_INT:
4126 case PEVENT_FUNC_ARG_LONG:
4127 case PEVENT_FUNC_ARG_PTR:
4128 args[i] = eval_num_arg(data, size, event, farg);
4130 case PEVENT_FUNC_ARG_STRING:
4131 trace_seq_init(&str);
4132 print_str_arg(&str, data, size, event, "%s", -1, farg);
4133 trace_seq_terminate(&str);
4134 string = malloc(sizeof(*string));
4136 do_warning_event(event, "%s(%d): malloc str",
4137 __func__, __LINE__);
4140 string->next = strings;
4141 string->str = strdup(str.buffer);
4144 do_warning_event(event, "%s(%d): malloc str",
4145 __func__, __LINE__);
4148 args[i] = (uintptr_t)string->str;
4150 trace_seq_destroy(&str);
4154 * Something went totally wrong, this is not
4155 * an input error, something in this code broke.
4157 do_warning_event(event, "Unexpected end of arguments\n");
4161 param = param->next;
4164 ret = (*func_handle->func)(s, args);
4169 strings = string->next;
4175 /* TBD : handle return type here */
4179 static void free_args(struct print_arg *args)
4181 struct print_arg *next;
4191 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
4193 struct pevent *pevent = event->pevent;
4194 struct format_field *field, *ip_field;
4195 struct print_arg *args, *arg, **next;
4196 unsigned long long ip, val;
4201 field = pevent->bprint_buf_field;
4202 ip_field = pevent->bprint_ip_field;
4205 field = pevent_find_field(event, "buf");
4207 do_warning_event(event, "can't find buffer field for binary printk");
4210 ip_field = pevent_find_field(event, "ip");
4212 do_warning_event(event, "can't find ip field for binary printk");
4215 pevent->bprint_buf_field = field;
4216 pevent->bprint_ip_field = ip_field;
4219 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
4222 * The first arg is the IP pointer.
4226 do_warning_event(event, "%s(%d): not enough memory!",
4227 __func__, __LINE__);
4234 arg->type = PRINT_ATOM;
4236 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4239 /* skip the first "%ps: " */
4240 for (ptr = fmt + 5, bptr = data + field->offset;
4241 bptr < data + size && *ptr; ptr++) {
4276 vsize = pevent->long_size;
4290 /* the pointers are always 4 bytes aligned */
4291 bptr = (void *)(((unsigned long)bptr + 3) &
4293 val = pevent_read_number(pevent, bptr, vsize);
4297 do_warning_event(event, "%s(%d): not enough memory!",
4298 __func__, __LINE__);
4302 arg->type = PRINT_ATOM;
4303 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4310 * The '*' case means that an arg is used as the length.
4311 * We need to continue to figure out for what.
4320 do_warning_event(event, "%s(%d): not enough memory!",
4321 __func__, __LINE__);
4325 arg->type = PRINT_BSTRING;
4326 arg->string.string = strdup(bptr);
4327 if (!arg->string.string)
4329 bptr += strlen(bptr) + 1;
4346 get_bprint_format(void *data, int size __maybe_unused,
4347 struct event_format *event)
4349 struct pevent *pevent = event->pevent;
4350 unsigned long long addr;
4351 struct format_field *field;
4352 struct printk_map *printk;
4355 field = pevent->bprint_fmt_field;
4358 field = pevent_find_field(event, "fmt");
4360 do_warning_event(event, "can't find format field for binary printk");
4363 pevent->bprint_fmt_field = field;
4366 addr = pevent_read_number(pevent, data + field->offset, field->size);
4368 printk = find_printk(pevent, addr);
4370 if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4375 if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
4381 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4382 struct event_format *event, struct print_arg *arg)
4385 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4387 if (arg->type == PRINT_FUNC) {
4388 process_defined_func(s, data, size, event, arg);
4392 if (arg->type != PRINT_FIELD) {
4393 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4399 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4400 if (!arg->field.field) {
4402 pevent_find_any_field(event, arg->field.name);
4403 if (!arg->field.field) {
4404 do_warning_event(event, "%s: field %s not found",
4405 __func__, arg->field.name);
4409 if (arg->field.field->size != 6) {
4410 trace_seq_printf(s, "INVALIDMAC");
4413 buf = data + arg->field.field->offset;
4414 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4417 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4422 fmt = "%03d.%03d.%03d.%03d";
4424 fmt = "%d.%d.%d.%d";
4426 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4429 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4431 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4432 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4435 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4437 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4440 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4443 unsigned char zerolength[8];
4448 bool needcolon = false;
4450 struct in6_addr in6;
4452 memcpy(&in6, addr, sizeof(struct in6_addr));
4454 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4456 memset(zerolength, 0, sizeof(zerolength));
4463 /* find position of longest 0 run */
4464 for (i = 0; i < range; i++) {
4465 for (j = i; j < range; j++) {
4466 if (in6.s6_addr16[j] != 0)
4471 for (i = 0; i < range; i++) {
4472 if (zerolength[i] > longest) {
4473 longest = zerolength[i];
4477 if (longest == 1) /* don't compress a single 0 */
4481 for (i = 0; i < range; i++) {
4482 if (i == colonpos) {
4483 if (needcolon || i == 0)
4484 trace_seq_printf(s, ":");
4485 trace_seq_printf(s, ":");
4491 trace_seq_printf(s, ":");
4494 /* hex u16 without leading 0s */
4495 word = ntohs(in6.s6_addr16[i]);
4499 trace_seq_printf(s, "%x%02x", hi, lo);
4501 trace_seq_printf(s, "%x", lo);
4508 trace_seq_printf(s, ":");
4509 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4515 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4519 for (j = 0; j < 16; j += 2) {
4520 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4521 if (i == 'I' && j < 14)
4522 trace_seq_printf(s, ":");
4527 * %pi4 print an IPv4 address with leading zeros
4528 * %pI4 print an IPv4 address without leading zeros
4529 * %pi6 print an IPv6 address without colons
4530 * %pI6 print an IPv6 address with colons
4531 * %pI6c print an IPv6 address in compressed form with colons
4532 * %pISpc print an IP address based on sockaddr; p adds port.
4534 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4535 void *data, int size, struct event_format *event,
4536 struct print_arg *arg)
4540 if (arg->type == PRINT_FUNC) {
4541 process_defined_func(s, data, size, event, arg);
4545 if (arg->type != PRINT_FIELD) {
4546 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4550 if (!arg->field.field) {
4552 pevent_find_any_field(event, arg->field.name);
4553 if (!arg->field.field) {
4554 do_warning("%s: field %s not found",
4555 __func__, arg->field.name);
4560 buf = data + arg->field.field->offset;
4562 if (arg->field.field->size != 4) {
4563 trace_seq_printf(s, "INVALIDIPv4");
4566 print_ip4_addr(s, i, buf);
4571 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4572 void *data, int size, struct event_format *event,
4573 struct print_arg *arg)
4580 if (i == 'I' && *ptr == 'c') {
4586 if (arg->type == PRINT_FUNC) {
4587 process_defined_func(s, data, size, event, arg);
4591 if (arg->type != PRINT_FIELD) {
4592 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4596 if (!arg->field.field) {
4598 pevent_find_any_field(event, arg->field.name);
4599 if (!arg->field.field) {
4600 do_warning("%s: field %s not found",
4601 __func__, arg->field.name);
4606 buf = data + arg->field.field->offset;
4608 if (arg->field.field->size != 16) {
4609 trace_seq_printf(s, "INVALIDIPv6");
4614 print_ip6c_addr(s, buf);
4616 print_ip6_addr(s, i, buf);
4621 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4622 void *data, int size, struct event_format *event,
4623 struct print_arg *arg)
4625 char have_c = 0, have_p = 0;
4627 struct sockaddr_storage *sa;
4644 if (arg->type == PRINT_FUNC) {
4645 process_defined_func(s, data, size, event, arg);
4649 if (arg->type != PRINT_FIELD) {
4650 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4654 if (!arg->field.field) {
4656 pevent_find_any_field(event, arg->field.name);
4657 if (!arg->field.field) {
4658 do_warning("%s: field %s not found",
4659 __func__, arg->field.name);
4664 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4666 if (sa->ss_family == AF_INET) {
4667 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4669 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4670 trace_seq_printf(s, "INVALIDIPv4");
4674 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4676 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4679 } else if (sa->ss_family == AF_INET6) {
4680 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4682 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4683 trace_seq_printf(s, "INVALIDIPv6");
4688 trace_seq_printf(s, "[");
4690 buf = (unsigned char *) &sa6->sin6_addr;
4692 print_ip6c_addr(s, buf);
4694 print_ip6_addr(s, i, buf);
4697 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4703 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4704 void *data, int size, struct event_format *event,
4705 struct print_arg *arg)
4707 char i = *ptr; /* 'i' or 'I' */
4720 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4723 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4726 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4735 static int is_printable_array(char *p, unsigned int len)
4739 for (i = 0; i < len && p[i]; i++)
4740 if (!isprint(p[i]) && !isspace(p[i]))
4745 void pevent_print_field(struct trace_seq *s, void *data,
4746 struct format_field *field)
4748 unsigned long long val;
4749 unsigned int offset, len, i;
4750 struct pevent *pevent = field->event->pevent;
4752 if (field->flags & FIELD_IS_ARRAY) {
4753 offset = field->offset;
4755 if (field->flags & FIELD_IS_DYNAMIC) {
4756 val = pevent_read_number(pevent, data + offset, len);
4761 if (field->flags & FIELD_IS_STRING &&
4762 is_printable_array(data + offset, len)) {
4763 trace_seq_printf(s, "%s", (char *)data + offset);
4765 trace_seq_puts(s, "ARRAY[");
4766 for (i = 0; i < len; i++) {
4768 trace_seq_puts(s, ", ");
4769 trace_seq_printf(s, "%02x",
4770 *((unsigned char *)data + offset + i));
4772 trace_seq_putc(s, ']');
4773 field->flags &= ~FIELD_IS_STRING;
4776 val = pevent_read_number(pevent, data + field->offset,
4778 if (field->flags & FIELD_IS_POINTER) {
4779 trace_seq_printf(s, "0x%llx", val);
4780 } else if (field->flags & FIELD_IS_SIGNED) {
4781 switch (field->size) {
4784 * If field is long then print it in hex.
4785 * A long usually stores pointers.
4787 if (field->flags & FIELD_IS_LONG)
4788 trace_seq_printf(s, "0x%x", (int)val);
4790 trace_seq_printf(s, "%d", (int)val);
4793 trace_seq_printf(s, "%2d", (short)val);
4796 trace_seq_printf(s, "%1d", (char)val);
4799 trace_seq_printf(s, "%lld", val);
4802 if (field->flags & FIELD_IS_LONG)
4803 trace_seq_printf(s, "0x%llx", val);
4805 trace_seq_printf(s, "%llu", val);
4810 void pevent_print_fields(struct trace_seq *s, void *data,
4811 int size __maybe_unused, struct event_format *event)
4813 struct format_field *field;
4815 field = event->format.fields;
4817 trace_seq_printf(s, " %s=", field->name);
4818 pevent_print_field(s, data, field);
4819 field = field->next;
4823 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
4825 struct pevent *pevent = event->pevent;
4826 struct print_fmt *print_fmt = &event->print_fmt;
4827 struct print_arg *arg = print_fmt->args;
4828 struct print_arg *args = NULL;
4829 const char *ptr = print_fmt->format;
4830 unsigned long long val;
4831 struct func_map *func;
4832 const char *saveptr;
4834 char *bprint_fmt = NULL;
4842 if (event->flags & EVENT_FL_FAILED) {
4843 trace_seq_printf(s, "[FAILED TO PARSE]");
4844 pevent_print_fields(s, data, size, event);
4848 if (event->flags & EVENT_FL_ISBPRINT) {
4849 bprint_fmt = get_bprint_format(data, size, event);
4850 args = make_bprint_args(bprint_fmt, data, size, event);
4855 for (; *ptr; ptr++) {
4861 trace_seq_putc(s, '\n');
4864 trace_seq_putc(s, '\t');
4867 trace_seq_putc(s, '\r');
4870 trace_seq_putc(s, '\\');
4873 trace_seq_putc(s, *ptr);
4877 } else if (*ptr == '%') {
4885 trace_seq_putc(s, '%');
4888 /* FIXME: need to handle properly */
4900 /* The argument is the length. */
4902 do_warning_event(event, "no argument match");
4903 event->flags |= EVENT_FL_FAILED;
4906 len_arg = eval_num_arg(data, size, event, arg);
4917 if (pevent->long_size == 4)
4922 if (*(ptr+1) == 'F' || *(ptr+1) == 'f' ||
4923 *(ptr+1) == 'S' || *(ptr+1) == 's') {
4926 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
4927 print_mac_arg(s, *(ptr+1), data, size, event, arg);
4931 } else if (*(ptr+1) == 'I' || *(ptr+1) == 'i') {
4934 n = print_ip_arg(s, ptr+1, data, size, event, arg);
4949 do_warning_event(event, "no argument match");
4950 event->flags |= EVENT_FL_FAILED;
4954 len = ((unsigned long)ptr + 1) -
4955 (unsigned long)saveptr;
4957 /* should never happen */
4959 do_warning_event(event, "bad format!");
4960 event->flags |= EVENT_FL_FAILED;
4964 memcpy(format, saveptr, len);
4967 val = eval_num_arg(data, size, event, arg);
4971 func = find_func(pevent, val);
4973 trace_seq_puts(s, func->func);
4974 if (show_func == 'F')
4981 if (pevent->long_size == 8 && ls &&
4982 sizeof(long) != 8) {
4985 /* make %l into %ll */
4986 if (ls == 1 && (p = strchr(format, 'l')))
4987 memmove(p+1, p, strlen(p)+1);
4988 else if (strcmp(format, "%p") == 0)
4989 strcpy(format, "0x%llx");
4995 trace_seq_printf(s, format, len_arg, (char)val);
4997 trace_seq_printf(s, format, (char)val);
5001 trace_seq_printf(s, format, len_arg, (short)val);
5003 trace_seq_printf(s, format, (short)val);
5007 trace_seq_printf(s, format, len_arg, (int)val);
5009 trace_seq_printf(s, format, (int)val);
5013 trace_seq_printf(s, format, len_arg, (long)val);
5015 trace_seq_printf(s, format, (long)val);
5019 trace_seq_printf(s, format, len_arg,
5022 trace_seq_printf(s, format, (long long)val);
5025 do_warning_event(event, "bad count (%d)", ls);
5026 event->flags |= EVENT_FL_FAILED;
5031 do_warning_event(event, "no matching argument");
5032 event->flags |= EVENT_FL_FAILED;
5036 len = ((unsigned long)ptr + 1) -
5037 (unsigned long)saveptr;
5039 /* should never happen */
5041 do_warning_event(event, "bad format!");
5042 event->flags |= EVENT_FL_FAILED;
5046 memcpy(format, saveptr, len);
5050 /* Use helper trace_seq */
5052 print_str_arg(&p, data, size, event,
5053 format, len_arg, arg);
5054 trace_seq_terminate(&p);
5055 trace_seq_puts(s, p.buffer);
5056 trace_seq_destroy(&p);
5060 trace_seq_printf(s, ">%c<", *ptr);
5064 trace_seq_putc(s, *ptr);
5067 if (event->flags & EVENT_FL_FAILED) {
5069 trace_seq_printf(s, "[FAILED TO PARSE]");
5079 * pevent_data_lat_fmt - parse the data for the latency format
5080 * @pevent: a handle to the pevent
5081 * @s: the trace_seq to write to
5082 * @record: the record to read from
5084 * This parses out the Latency format (interrupts disabled,
5085 * need rescheduling, in hard/soft interrupt, preempt count
5086 * and lock depth) and places it into the trace_seq.
5088 void pevent_data_lat_fmt(struct pevent *pevent,
5089 struct trace_seq *s, struct pevent_record *record)
5091 static int check_lock_depth = 1;
5092 static int check_migrate_disable = 1;
5093 static int lock_depth_exists;
5094 static int migrate_disable_exists;
5095 unsigned int lat_flags;
5098 int migrate_disable;
5101 void *data = record->data;
5103 lat_flags = parse_common_flags(pevent, data);
5104 pc = parse_common_pc(pevent, data);
5105 /* lock_depth may not always exist */
5106 if (lock_depth_exists)
5107 lock_depth = parse_common_lock_depth(pevent, data);
5108 else if (check_lock_depth) {
5109 lock_depth = parse_common_lock_depth(pevent, data);
5111 check_lock_depth = 0;
5113 lock_depth_exists = 1;
5116 /* migrate_disable may not always exist */
5117 if (migrate_disable_exists)
5118 migrate_disable = parse_common_migrate_disable(pevent, data);
5119 else if (check_migrate_disable) {
5120 migrate_disable = parse_common_migrate_disable(pevent, data);
5121 if (migrate_disable < 0)
5122 check_migrate_disable = 0;
5124 migrate_disable_exists = 1;
5127 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5128 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5130 trace_seq_printf(s, "%c%c%c",
5131 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5132 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5134 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5136 (hardirq && softirq) ? 'H' :
5137 hardirq ? 'h' : softirq ? 's' : '.');
5140 trace_seq_printf(s, "%x", pc);
5142 trace_seq_putc(s, '.');
5144 if (migrate_disable_exists) {
5145 if (migrate_disable < 0)
5146 trace_seq_putc(s, '.');
5148 trace_seq_printf(s, "%d", migrate_disable);
5151 if (lock_depth_exists) {
5153 trace_seq_putc(s, '.');
5155 trace_seq_printf(s, "%d", lock_depth);
5158 trace_seq_terminate(s);
5162 * pevent_data_type - parse out the given event type
5163 * @pevent: a handle to the pevent
5164 * @rec: the record to read from
5166 * This returns the event id from the @rec.
5168 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
5170 return trace_parse_common_type(pevent, rec->data);
5174 * pevent_data_event_from_type - find the event by a given type
5175 * @pevent: a handle to the pevent
5176 * @type: the type of the event.
5178 * This returns the event form a given @type;
5180 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
5182 return pevent_find_event(pevent, type);
5186 * pevent_data_pid - parse the PID from raw data
5187 * @pevent: a handle to the pevent
5188 * @rec: the record to parse
5190 * This returns the PID from a raw data.
5192 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
5194 return parse_common_pid(pevent, rec->data);
5198 * pevent_data_comm_from_pid - return the command line from PID
5199 * @pevent: a handle to the pevent
5200 * @pid: the PID of the task to search for
5202 * This returns a pointer to the command line that has the given
5205 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
5209 comm = find_cmdline(pevent, pid);
5213 static struct cmdline *
5214 pid_from_cmdlist(struct pevent *pevent, const char *comm, struct cmdline *next)
5216 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5219 cmdlist = cmdlist->next;
5221 cmdlist = pevent->cmdlist;
5223 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5224 cmdlist = cmdlist->next;
5226 return (struct cmdline *)cmdlist;
5230 * pevent_data_pid_from_comm - return the pid from a given comm
5231 * @pevent: a handle to the pevent
5232 * @comm: the cmdline to find the pid from
5233 * @next: the cmdline structure to find the next comm
5235 * This returns the cmdline structure that holds a pid for a given
5236 * comm, or NULL if none found. As there may be more than one pid for
5237 * a given comm, the result of this call can be passed back into
5238 * a recurring call in the @next paramater, and then it will find the
5240 * Also, it does a linear seach, so it may be slow.
5242 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
5243 struct cmdline *next)
5245 struct cmdline *cmdline;
5248 * If the cmdlines have not been converted yet, then use
5251 if (!pevent->cmdlines)
5252 return pid_from_cmdlist(pevent, comm, next);
5256 * The next pointer could have been still from
5257 * a previous call before cmdlines were created
5259 if (next < pevent->cmdlines ||
5260 next >= pevent->cmdlines + pevent->cmdline_count)
5267 cmdline = pevent->cmdlines;
5269 while (cmdline < pevent->cmdlines + pevent->cmdline_count) {
5270 if (strcmp(cmdline->comm, comm) == 0)
5278 * pevent_cmdline_pid - return the pid associated to a given cmdline
5279 * @cmdline: The cmdline structure to get the pid from
5281 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5284 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline)
5286 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5292 * If cmdlines have not been created yet, or cmdline is
5293 * not part of the array, then treat it as a cmdlist instead.
5295 if (!pevent->cmdlines ||
5296 cmdline < pevent->cmdlines ||
5297 cmdline >= pevent->cmdlines + pevent->cmdline_count)
5298 return cmdlist->pid;
5300 return cmdline->pid;
5304 * pevent_data_comm_from_pid - parse the data into the print format
5305 * @s: the trace_seq to write to
5306 * @event: the handle to the event
5307 * @record: the record to read from
5309 * This parses the raw @data using the given @event information and
5310 * writes the print format into the trace_seq.
5312 void pevent_event_info(struct trace_seq *s, struct event_format *event,
5313 struct pevent_record *record)
5315 int print_pretty = 1;
5317 if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
5318 pevent_print_fields(s, record->data, record->size, event);
5321 if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
5322 print_pretty = event->handler(s, record, event,
5326 pretty_print(s, record->data, record->size, event);
5329 trace_seq_terminate(s);
5332 static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
5334 if (!use_trace_clock)
5337 if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
5338 || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
5341 /* trace_clock is setting in tsc or counter mode */
5346 * pevent_find_event_by_record - return the event from a given record
5347 * @pevent: a handle to the pevent
5348 * @record: The record to get the event from
5350 * Returns the associated event for a given record, or NULL if non is
5353 struct event_format *
5354 pevent_find_event_by_record(struct pevent *pevent, struct pevent_record *record)
5358 if (record->size < 0) {
5359 do_warning("ug! negative record size %d", record->size);
5363 type = trace_parse_common_type(pevent, record->data);
5365 return pevent_find_event(pevent, type);
5369 * pevent_print_event_task - Write the event task comm, pid and CPU
5370 * @pevent: a handle to the pevent
5371 * @s: the trace_seq to write to
5372 * @event: the handle to the record's event
5373 * @record: The record to get the event from
5375 * Writes the tasks comm, pid and CPU to @s.
5377 void pevent_print_event_task(struct pevent *pevent, struct trace_seq *s,
5378 struct event_format *event,
5379 struct pevent_record *record)
5381 void *data = record->data;
5385 pid = parse_common_pid(pevent, data);
5386 comm = find_cmdline(pevent, pid);
5388 if (pevent->latency_format) {
5389 trace_seq_printf(s, "%8.8s-%-5d %3d",
5390 comm, pid, record->cpu);
5392 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
5396 * pevent_print_event_time - Write the event timestamp
5397 * @pevent: a handle to the pevent
5398 * @s: the trace_seq to write to
5399 * @event: the handle to the record's event
5400 * @record: The record to get the event from
5401 * @use_trace_clock: Set to parse according to the @pevent->trace_clock
5403 * Writes the timestamp of the record into @s.
5405 void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
5406 struct event_format *event,
5407 struct pevent_record *record,
5408 bool use_trace_clock)
5411 unsigned long usecs;
5412 unsigned long nsecs;
5414 bool use_usec_format;
5416 use_usec_format = is_timestamp_in_us(pevent->trace_clock,
5418 if (use_usec_format) {
5419 secs = record->ts / NSECS_PER_SEC;
5420 nsecs = record->ts - secs * NSECS_PER_SEC;
5423 if (pevent->latency_format) {
5424 trace_seq_printf(s, " %3d", record->cpu);
5425 pevent_data_lat_fmt(pevent, s, record);
5427 trace_seq_printf(s, " [%03d]", record->cpu);
5429 if (use_usec_format) {
5430 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
5434 usecs = (nsecs + 500) / NSECS_PER_USEC;
5435 /* To avoid usecs larger than 1 sec */
5436 if (usecs >= 1000000) {
5443 trace_seq_printf(s, " %5lu.%0*lu:", secs, p, usecs);
5445 trace_seq_printf(s, " %12llu:", record->ts);
5449 * pevent_print_event_data - Write the event data section
5450 * @pevent: a handle to the pevent
5451 * @s: the trace_seq to write to
5452 * @event: the handle to the record's event
5453 * @record: The record to get the event from
5455 * Writes the parsing of the record's data to @s.
5457 void pevent_print_event_data(struct pevent *pevent, struct trace_seq *s,
5458 struct event_format *event,
5459 struct pevent_record *record)
5461 static const char *spaces = " "; /* 20 spaces */
5464 trace_seq_printf(s, " %s: ", event->name);
5466 /* Space out the event names evenly. */
5467 len = strlen(event->name);
5469 trace_seq_printf(s, "%.*s", 20 - len, spaces);
5471 pevent_event_info(s, event, record);
5474 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
5475 struct pevent_record *record, bool use_trace_clock)
5477 struct event_format *event;
5479 event = pevent_find_event_by_record(pevent, record);
5481 do_warning("ug! no event found for type %d",
5482 trace_parse_common_type(pevent, record->data));
5486 pevent_print_event_task(pevent, s, event, record);
5487 pevent_print_event_time(pevent, s, event, record, use_trace_clock);
5488 pevent_print_event_data(pevent, s, event, record);
5491 static int events_id_cmp(const void *a, const void *b)
5493 struct event_format * const * ea = a;
5494 struct event_format * const * eb = b;
5496 if ((*ea)->id < (*eb)->id)
5499 if ((*ea)->id > (*eb)->id)
5505 static int events_name_cmp(const void *a, const void *b)
5507 struct event_format * const * ea = a;
5508 struct event_format * const * eb = b;
5511 res = strcmp((*ea)->name, (*eb)->name);
5515 res = strcmp((*ea)->system, (*eb)->system);
5519 return events_id_cmp(a, b);
5522 static int events_system_cmp(const void *a, const void *b)
5524 struct event_format * const * ea = a;
5525 struct event_format * const * eb = b;
5528 res = strcmp((*ea)->system, (*eb)->system);
5532 res = strcmp((*ea)->name, (*eb)->name);
5536 return events_id_cmp(a, b);
5539 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
5541 struct event_format **events;
5542 int (*sort)(const void *a, const void *b);
5544 events = pevent->sort_events;
5546 if (events && pevent->last_type == sort_type)
5550 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
5554 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
5555 events[pevent->nr_events] = NULL;
5557 pevent->sort_events = events;
5559 /* the internal events are sorted by id */
5560 if (sort_type == EVENT_SORT_ID) {
5561 pevent->last_type = sort_type;
5566 switch (sort_type) {
5568 sort = events_id_cmp;
5570 case EVENT_SORT_NAME:
5571 sort = events_name_cmp;
5573 case EVENT_SORT_SYSTEM:
5574 sort = events_system_cmp;
5580 qsort(events, pevent->nr_events, sizeof(*events), sort);
5581 pevent->last_type = sort_type;
5586 static struct format_field **
5587 get_event_fields(const char *type, const char *name,
5588 int count, struct format_field *list)
5590 struct format_field **fields;
5591 struct format_field *field;
5594 fields = malloc(sizeof(*fields) * (count + 1));
5598 for (field = list; field; field = field->next) {
5599 fields[i++] = field;
5600 if (i == count + 1) {
5601 do_warning("event %s has more %s fields than specified",
5609 do_warning("event %s has less %s fields than specified",
5618 * pevent_event_common_fields - return a list of common fields for an event
5619 * @event: the event to return the common fields of.
5621 * Returns an allocated array of fields. The last item in the array is NULL.
5622 * The array must be freed with free().
5624 struct format_field **pevent_event_common_fields(struct event_format *event)
5626 return get_event_fields("common", event->name,
5627 event->format.nr_common,
5628 event->format.common_fields);
5632 * pevent_event_fields - return a list of event specific fields for an event
5633 * @event: the event to return the fields of.
5635 * Returns an allocated array of fields. The last item in the array is NULL.
5636 * The array must be freed with free().
5638 struct format_field **pevent_event_fields(struct event_format *event)
5640 return get_event_fields("event", event->name,
5641 event->format.nr_fields,
5642 event->format.fields);
5645 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
5647 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5649 trace_seq_puts(s, ", ");
5650 print_fields(s, field->next);
5655 static void print_args(struct print_arg *args)
5657 int print_paren = 1;
5660 switch (args->type) {
5665 printf("%s", args->atom.atom);
5668 printf("REC->%s", args->field.name);
5671 printf("__print_flags(");
5672 print_args(args->flags.field);
5673 printf(", %s, ", args->flags.delim);
5675 print_fields(&s, args->flags.flags);
5676 trace_seq_do_printf(&s);
5677 trace_seq_destroy(&s);
5681 printf("__print_symbolic(");
5682 print_args(args->symbol.field);
5685 print_fields(&s, args->symbol.symbols);
5686 trace_seq_do_printf(&s);
5687 trace_seq_destroy(&s);
5691 printf("__print_hex(");
5692 print_args(args->hex.field);
5694 print_args(args->hex.size);
5697 case PRINT_INT_ARRAY:
5698 printf("__print_array(");
5699 print_args(args->int_array.field);
5701 print_args(args->int_array.count);
5703 print_args(args->int_array.el_size);
5708 printf("__get_str(%s)", args->string.string);
5711 printf("__get_bitmask(%s)", args->bitmask.bitmask);
5714 printf("(%s)", args->typecast.type);
5715 print_args(args->typecast.item);
5718 if (strcmp(args->op.op, ":") == 0)
5722 print_args(args->op.left);
5723 printf(" %s ", args->op.op);
5724 print_args(args->op.right);
5729 /* we should warn... */
5734 print_args(args->next);
5738 static void parse_header_field(const char *field,
5739 int *offset, int *size, int mandatory)
5741 unsigned long long save_input_buf_ptr;
5742 unsigned long long save_input_buf_siz;
5746 save_input_buf_ptr = input_buf_ptr;
5747 save_input_buf_siz = input_buf_siz;
5749 if (read_expected(EVENT_ITEM, "field") < 0)
5751 if (read_expected(EVENT_OP, ":") < 0)
5755 if (read_expect_type(EVENT_ITEM, &token) < 0)
5760 * If this is not a mandatory field, then test it first.
5763 if (read_expected(EVENT_ITEM, field) < 0)
5766 if (read_expect_type(EVENT_ITEM, &token) < 0)
5768 if (strcmp(token, field) != 0)
5773 if (read_expected(EVENT_OP, ";") < 0)
5775 if (read_expected(EVENT_ITEM, "offset") < 0)
5777 if (read_expected(EVENT_OP, ":") < 0)
5779 if (read_expect_type(EVENT_ITEM, &token) < 0)
5781 *offset = atoi(token);
5783 if (read_expected(EVENT_OP, ";") < 0)
5785 if (read_expected(EVENT_ITEM, "size") < 0)
5787 if (read_expected(EVENT_OP, ":") < 0)
5789 if (read_expect_type(EVENT_ITEM, &token) < 0)
5791 *size = atoi(token);
5793 if (read_expected(EVENT_OP, ";") < 0)
5795 type = read_token(&token);
5796 if (type != EVENT_NEWLINE) {
5797 /* newer versions of the kernel have a "signed" type */
5798 if (type != EVENT_ITEM)
5801 if (strcmp(token, "signed") != 0)
5806 if (read_expected(EVENT_OP, ":") < 0)
5809 if (read_expect_type(EVENT_ITEM, &token))
5813 if (read_expected(EVENT_OP, ";") < 0)
5816 if (read_expect_type(EVENT_NEWLINE, &token))
5824 input_buf_ptr = save_input_buf_ptr;
5825 input_buf_siz = save_input_buf_siz;
5832 * pevent_parse_header_page - parse the data stored in the header page
5833 * @pevent: the handle to the pevent
5834 * @buf: the buffer storing the header page format string
5835 * @size: the size of @buf
5836 * @long_size: the long size to use if there is no header
5838 * This parses the header page format for information on the
5839 * ring buffer used. The @buf should be copied from
5841 * /sys/kernel/debug/tracing/events/header_page
5843 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
5850 * Old kernels did not have header page info.
5851 * Sorry but we just use what we find here in user space.
5853 pevent->header_page_ts_size = sizeof(long long);
5854 pevent->header_page_size_size = long_size;
5855 pevent->header_page_data_offset = sizeof(long long) + long_size;
5856 pevent->old_format = 1;
5859 init_input_buf(buf, size);
5861 parse_header_field("timestamp", &pevent->header_page_ts_offset,
5862 &pevent->header_page_ts_size, 1);
5863 parse_header_field("commit", &pevent->header_page_size_offset,
5864 &pevent->header_page_size_size, 1);
5865 parse_header_field("overwrite", &pevent->header_page_overwrite,
5867 parse_header_field("data", &pevent->header_page_data_offset,
5868 &pevent->header_page_data_size, 1);
5873 static int event_matches(struct event_format *event,
5874 int id, const char *sys_name,
5875 const char *event_name)
5877 if (id >= 0 && id != event->id)
5880 if (event_name && (strcmp(event_name, event->name) != 0))
5883 if (sys_name && (strcmp(sys_name, event->system) != 0))
5889 static void free_handler(struct event_handler *handle)
5891 free((void *)handle->sys_name);
5892 free((void *)handle->event_name);
5896 static int find_event_handle(struct pevent *pevent, struct event_format *event)
5898 struct event_handler *handle, **next;
5900 for (next = &pevent->handlers; *next;
5901 next = &(*next)->next) {
5903 if (event_matches(event, handle->id,
5905 handle->event_name))
5912 pr_stat("overriding event (%d) %s:%s with new print handler",
5913 event->id, event->system, event->name);
5915 event->handler = handle->func;
5916 event->context = handle->context;
5918 *next = handle->next;
5919 free_handler(handle);
5925 * __pevent_parse_format - parse the event format
5926 * @buf: the buffer storing the event format string
5927 * @size: the size of @buf
5928 * @sys: the system the event belongs to
5930 * This parses the event format and creates an event structure
5931 * to quickly parse raw data for a given event.
5933 * These files currently come from:
5935 * /sys/kernel/debug/tracing/events/.../.../format
5937 enum pevent_errno __pevent_parse_format(struct event_format **eventp,
5938 struct pevent *pevent, const char *buf,
5939 unsigned long size, const char *sys)
5941 struct event_format *event;
5944 init_input_buf(buf, size);
5946 *eventp = event = alloc_event();
5948 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
5950 event->name = event_read_name();
5953 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5954 goto event_alloc_failed;
5957 if (strcmp(sys, "ftrace") == 0) {
5958 event->flags |= EVENT_FL_ISFTRACE;
5960 if (strcmp(event->name, "bprint") == 0)
5961 event->flags |= EVENT_FL_ISBPRINT;
5964 event->id = event_read_id();
5965 if (event->id < 0) {
5966 ret = PEVENT_ERRNO__READ_ID_FAILED;
5968 * This isn't an allocation error actually.
5969 * But as the ID is critical, just bail out.
5971 goto event_alloc_failed;
5974 event->system = strdup(sys);
5975 if (!event->system) {
5976 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
5977 goto event_alloc_failed;
5980 /* Add pevent to event so that it can be referenced */
5981 event->pevent = pevent;
5983 ret = event_read_format(event);
5985 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
5986 goto event_parse_failed;
5990 * If the event has an override, don't print warnings if the event
5991 * print format fails to parse.
5993 if (pevent && find_event_handle(pevent, event))
5996 ret = event_read_print(event);
6000 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
6001 goto event_parse_failed;
6004 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
6005 struct format_field *field;
6006 struct print_arg *arg, **list;
6008 /* old ftrace had no args */
6009 list = &event->print_fmt.args;
6010 for (field = event->format.fields; field; field = field->next) {
6013 event->flags |= EVENT_FL_FAILED;
6014 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6016 arg->type = PRINT_FIELD;
6017 arg->field.name = strdup(field->name);
6018 if (!arg->field.name) {
6019 event->flags |= EVENT_FL_FAILED;
6021 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6023 arg->field.field = field;
6033 event->flags |= EVENT_FL_FAILED;
6037 free(event->system);
6044 static enum pevent_errno
6045 __pevent_parse_event(struct pevent *pevent,
6046 struct event_format **eventp,
6047 const char *buf, unsigned long size,
6050 int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
6051 struct event_format *event = *eventp;
6056 if (pevent && add_event(pevent, event)) {
6057 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6058 goto event_add_failed;
6061 #define PRINT_ARGS 0
6062 if (PRINT_ARGS && event->print_fmt.args)
6063 print_args(event->print_fmt.args);
6068 pevent_free_format(event);
6073 * pevent_parse_format - parse the event format
6074 * @pevent: the handle to the pevent
6075 * @eventp: returned format
6076 * @buf: the buffer storing the event format string
6077 * @size: the size of @buf
6078 * @sys: the system the event belongs to
6080 * This parses the event format and creates an event structure
6081 * to quickly parse raw data for a given event.
6083 * These files currently come from:
6085 * /sys/kernel/debug/tracing/events/.../.../format
6087 enum pevent_errno pevent_parse_format(struct pevent *pevent,
6088 struct event_format **eventp,
6090 unsigned long size, const char *sys)
6092 return __pevent_parse_event(pevent, eventp, buf, size, sys);
6096 * pevent_parse_event - parse the event format
6097 * @pevent: the handle to the pevent
6098 * @buf: the buffer storing the event format string
6099 * @size: the size of @buf
6100 * @sys: the system the event belongs to
6102 * This parses the event format and creates an event structure
6103 * to quickly parse raw data for a given event.
6105 * These files currently come from:
6107 * /sys/kernel/debug/tracing/events/.../.../format
6109 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
6110 unsigned long size, const char *sys)
6112 struct event_format *event = NULL;
6113 return __pevent_parse_event(pevent, &event, buf, size, sys);
6117 #define _PE(code, str) str
6118 static const char * const pevent_error_str[] = {
6123 int pevent_strerror(struct pevent *pevent __maybe_unused,
6124 enum pevent_errno errnum, char *buf, size_t buflen)
6130 msg = strerror_r(errnum, buf, buflen);
6132 size_t len = strlen(msg);
6133 memcpy(buf, msg, min(buflen - 1, len));
6134 *(buf + min(buflen - 1, len)) = '\0';
6139 if (errnum <= __PEVENT_ERRNO__START ||
6140 errnum >= __PEVENT_ERRNO__END)
6143 idx = errnum - __PEVENT_ERRNO__START - 1;
6144 msg = pevent_error_str[idx];
6145 snprintf(buf, buflen, "%s", msg);
6150 int get_field_val(struct trace_seq *s, struct format_field *field,
6151 const char *name, struct pevent_record *record,
6152 unsigned long long *val, int err)
6156 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6160 if (pevent_read_number_field(field, record->data, val)) {
6162 trace_seq_printf(s, " %s=INVALID", name);
6170 * pevent_get_field_raw - return the raw pointer into the data field
6171 * @s: The seq to print to on error
6172 * @event: the event that the field is for
6173 * @name: The name of the field
6174 * @record: The record with the field name.
6175 * @len: place to store the field length.
6176 * @err: print default error if failed.
6178 * Returns a pointer into record->data of the field and places
6179 * the length of the field in @len.
6181 * On failure, it returns NULL.
6183 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
6184 const char *name, struct pevent_record *record,
6187 struct format_field *field;
6188 void *data = record->data;
6195 field = pevent_find_field(event, name);
6199 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6203 /* Allow @len to be NULL */
6207 offset = field->offset;
6208 if (field->flags & FIELD_IS_DYNAMIC) {
6209 offset = pevent_read_number(event->pevent,
6210 data + offset, field->size);
6211 *len = offset >> 16;
6216 return data + offset;
6220 * pevent_get_field_val - find a field and return its value
6221 * @s: The seq to print to on error
6222 * @event: the event that the field is for
6223 * @name: The name of the field
6224 * @record: The record with the field name.
6225 * @val: place to store the value of the field.
6226 * @err: print default error if failed.
6228 * Returns 0 on success -1 on field not found.
6230 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
6231 const char *name, struct pevent_record *record,
6232 unsigned long long *val, int err)
6234 struct format_field *field;
6239 field = pevent_find_field(event, name);
6241 return get_field_val(s, field, name, record, val, err);
6245 * pevent_get_common_field_val - find a common field and return its value
6246 * @s: The seq to print to on error
6247 * @event: the event that the field is for
6248 * @name: The name of the field
6249 * @record: The record with the field name.
6250 * @val: place to store the value of the field.
6251 * @err: print default error if failed.
6253 * Returns 0 on success -1 on field not found.
6255 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
6256 const char *name, struct pevent_record *record,
6257 unsigned long long *val, int err)
6259 struct format_field *field;
6264 field = pevent_find_common_field(event, name);
6266 return get_field_val(s, field, name, record, val, err);
6270 * pevent_get_any_field_val - find a any field and return its value
6271 * @s: The seq to print to on error
6272 * @event: the event that the field is for
6273 * @name: The name of the field
6274 * @record: The record with the field name.
6275 * @val: place to store the value of the field.
6276 * @err: print default error if failed.
6278 * Returns 0 on success -1 on field not found.
6280 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
6281 const char *name, struct pevent_record *record,
6282 unsigned long long *val, int err)
6284 struct format_field *field;
6289 field = pevent_find_any_field(event, name);
6291 return get_field_val(s, field, name, record, val, err);
6295 * pevent_print_num_field - print a field and a format
6296 * @s: The seq to print to
6297 * @fmt: The printf format to print the field with.
6298 * @event: the event that the field is for
6299 * @name: The name of the field
6300 * @record: The record with the field name.
6301 * @err: print default error if failed.
6303 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6305 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
6306 struct event_format *event, const char *name,
6307 struct pevent_record *record, int err)
6309 struct format_field *field = pevent_find_field(event, name);
6310 unsigned long long val;
6315 if (pevent_read_number_field(field, record->data, &val))
6318 return trace_seq_printf(s, fmt, val);
6322 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6327 * pevent_print_func_field - print a field and a format for function pointers
6328 * @s: The seq to print to
6329 * @fmt: The printf format to print the field with.
6330 * @event: the event that the field is for
6331 * @name: The name of the field
6332 * @record: The record with the field name.
6333 * @err: print default error if failed.
6335 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6337 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
6338 struct event_format *event, const char *name,
6339 struct pevent_record *record, int err)
6341 struct format_field *field = pevent_find_field(event, name);
6342 struct pevent *pevent = event->pevent;
6343 unsigned long long val;
6344 struct func_map *func;
6350 if (pevent_read_number_field(field, record->data, &val))
6353 func = find_func(pevent, val);
6356 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6358 sprintf(tmp, "0x%08llx", val);
6360 return trace_seq_printf(s, fmt, tmp);
6364 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6368 static void free_func_handle(struct pevent_function_handler *func)
6370 struct pevent_func_params *params;
6374 while (func->params) {
6375 params = func->params;
6376 func->params = params->next;
6384 * pevent_register_print_function - register a helper function
6385 * @pevent: the handle to the pevent
6386 * @func: the function to process the helper function
6387 * @ret_type: the return type of the helper function
6388 * @name: the name of the helper function
6389 * @parameters: A list of enum pevent_func_arg_type
6391 * Some events may have helper functions in the print format arguments.
6392 * This allows a plugin to dynamically create a way to process one
6393 * of these functions.
6395 * The @parameters is a variable list of pevent_func_arg_type enums that
6396 * must end with PEVENT_FUNC_ARG_VOID.
6398 int pevent_register_print_function(struct pevent *pevent,
6399 pevent_func_handler func,
6400 enum pevent_func_arg_type ret_type,
6403 struct pevent_function_handler *func_handle;
6404 struct pevent_func_params **next_param;
6405 struct pevent_func_params *param;
6406 enum pevent_func_arg_type type;
6410 func_handle = find_func_handler(pevent, name);
6413 * This is most like caused by the users own
6414 * plugins updating the function. This overrides the
6417 pr_stat("override of function helper '%s'", name);
6418 remove_func_handler(pevent, name);
6421 func_handle = calloc(1, sizeof(*func_handle));
6423 do_warning("Failed to allocate function handler");
6424 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6427 func_handle->ret_type = ret_type;
6428 func_handle->name = strdup(name);
6429 func_handle->func = func;
6430 if (!func_handle->name) {
6431 do_warning("Failed to allocate function name");
6433 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6436 next_param = &(func_handle->params);
6439 type = va_arg(ap, enum pevent_func_arg_type);
6440 if (type == PEVENT_FUNC_ARG_VOID)
6443 if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
6444 do_warning("Invalid argument type %d", type);
6445 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
6449 param = malloc(sizeof(*param));
6451 do_warning("Failed to allocate function param");
6452 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6458 *next_param = param;
6459 next_param = &(param->next);
6461 func_handle->nr_args++;
6465 func_handle->next = pevent->func_handlers;
6466 pevent->func_handlers = func_handle;
6471 free_func_handle(func_handle);
6476 * pevent_unregister_print_function - unregister a helper function
6477 * @pevent: the handle to the pevent
6478 * @func: the function to process the helper function
6479 * @name: the name of the helper function
6481 * This function removes existing print handler for function @name.
6483 * Returns 0 if the handler was removed successully, -1 otherwise.
6485 int pevent_unregister_print_function(struct pevent *pevent,
6486 pevent_func_handler func, char *name)
6488 struct pevent_function_handler *func_handle;
6490 func_handle = find_func_handler(pevent, name);
6491 if (func_handle && func_handle->func == func) {
6492 remove_func_handler(pevent, name);
6498 static struct event_format *pevent_search_event(struct pevent *pevent, int id,
6499 const char *sys_name,
6500 const char *event_name)
6502 struct event_format *event;
6506 event = pevent_find_event(pevent, id);
6509 if (event_name && (strcmp(event_name, event->name) != 0))
6511 if (sys_name && (strcmp(sys_name, event->system) != 0))
6514 event = pevent_find_event_by_name(pevent, sys_name, event_name);
6522 * pevent_register_event_handler - register a way to parse an event
6523 * @pevent: the handle to the pevent
6524 * @id: the id of the event to register
6525 * @sys_name: the system name the event belongs to
6526 * @event_name: the name of the event
6527 * @func: the function to call to parse the event information
6528 * @context: the data to be passed to @func
6530 * This function allows a developer to override the parsing of
6531 * a given event. If for some reason the default print format
6532 * is not sufficient, this function will register a function
6533 * for an event to be used to parse the data instead.
6535 * If @id is >= 0, then it is used to find the event.
6536 * else @sys_name and @event_name are used.
6538 int pevent_register_event_handler(struct pevent *pevent, int id,
6539 const char *sys_name, const char *event_name,
6540 pevent_event_handler_func func, void *context)
6542 struct event_format *event;
6543 struct event_handler *handle;
6545 event = pevent_search_event(pevent, id, sys_name, event_name);
6549 pr_stat("overriding event (%d) %s:%s with new print handler",
6550 event->id, event->system, event->name);
6552 event->handler = func;
6553 event->context = context;
6557 /* Save for later use. */
6558 handle = calloc(1, sizeof(*handle));
6560 do_warning("Failed to allocate event handler");
6561 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6566 handle->event_name = strdup(event_name);
6568 handle->sys_name = strdup(sys_name);
6570 if ((event_name && !handle->event_name) ||
6571 (sys_name && !handle->sys_name)) {
6572 do_warning("Failed to allocate event/sys name");
6573 free((void *)handle->event_name);
6574 free((void *)handle->sys_name);
6576 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6579 handle->func = func;
6580 handle->next = pevent->handlers;
6581 pevent->handlers = handle;
6582 handle->context = context;
6587 static int handle_matches(struct event_handler *handler, int id,
6588 const char *sys_name, const char *event_name,
6589 pevent_event_handler_func func, void *context)
6591 if (id >= 0 && id != handler->id)
6594 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6597 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6600 if (func != handler->func || context != handler->context)
6607 * pevent_unregister_event_handler - unregister an existing event handler
6608 * @pevent: the handle to the pevent
6609 * @id: the id of the event to unregister
6610 * @sys_name: the system name the handler belongs to
6611 * @event_name: the name of the event handler
6612 * @func: the function to call to parse the event information
6613 * @context: the data to be passed to @func
6615 * This function removes existing event handler (parser).
6617 * If @id is >= 0, then it is used to find the event.
6618 * else @sys_name and @event_name are used.
6620 * Returns 0 if handler was removed successfully, -1 if event was not found.
6622 int pevent_unregister_event_handler(struct pevent *pevent, int id,
6623 const char *sys_name, const char *event_name,
6624 pevent_event_handler_func func, void *context)
6626 struct event_format *event;
6627 struct event_handler *handle;
6628 struct event_handler **next;
6630 event = pevent_search_event(pevent, id, sys_name, event_name);
6634 if (event->handler == func && event->context == context) {
6635 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6636 event->id, event->system, event->name);
6638 event->handler = NULL;
6639 event->context = NULL;
6644 for (next = &pevent->handlers; *next; next = &(*next)->next) {
6646 if (handle_matches(handle, id, sys_name, event_name,
6654 *next = handle->next;
6655 free_handler(handle);
6661 * pevent_alloc - create a pevent handle
6663 struct pevent *pevent_alloc(void)
6665 struct pevent *pevent = calloc(1, sizeof(*pevent));
6668 pevent->ref_count = 1;
6673 void pevent_ref(struct pevent *pevent)
6675 pevent->ref_count++;
6678 void pevent_free_format_field(struct format_field *field)
6681 if (field->alias != field->name)
6687 static void free_format_fields(struct format_field *field)
6689 struct format_field *next;
6693 pevent_free_format_field(field);
6698 static void free_formats(struct format *format)
6700 free_format_fields(format->common_fields);
6701 free_format_fields(format->fields);
6704 void pevent_free_format(struct event_format *event)
6707 free(event->system);
6709 free_formats(&event->format);
6711 free(event->print_fmt.format);
6712 free_args(event->print_fmt.args);
6718 * pevent_free - free a pevent handle
6719 * @pevent: the pevent handle to free
6721 void pevent_free(struct pevent *pevent)
6723 struct cmdline_list *cmdlist, *cmdnext;
6724 struct func_list *funclist, *funcnext;
6725 struct printk_list *printklist, *printknext;
6726 struct pevent_function_handler *func_handler;
6727 struct event_handler *handle;
6733 cmdlist = pevent->cmdlist;
6734 funclist = pevent->funclist;
6735 printklist = pevent->printklist;
6737 pevent->ref_count--;
6738 if (pevent->ref_count)
6741 if (pevent->cmdlines) {
6742 for (i = 0; i < pevent->cmdline_count; i++)
6743 free(pevent->cmdlines[i].comm);
6744 free(pevent->cmdlines);
6748 cmdnext = cmdlist->next;
6749 free(cmdlist->comm);
6754 if (pevent->func_map) {
6755 for (i = 0; i < (int)pevent->func_count; i++) {
6756 free(pevent->func_map[i].func);
6757 free(pevent->func_map[i].mod);
6759 free(pevent->func_map);
6763 funcnext = funclist->next;
6764 free(funclist->func);
6765 free(funclist->mod);
6767 funclist = funcnext;
6770 while (pevent->func_handlers) {
6771 func_handler = pevent->func_handlers;
6772 pevent->func_handlers = func_handler->next;
6773 free_func_handle(func_handler);
6776 if (pevent->printk_map) {
6777 for (i = 0; i < (int)pevent->printk_count; i++)
6778 free(pevent->printk_map[i].printk);
6779 free(pevent->printk_map);
6782 while (printklist) {
6783 printknext = printklist->next;
6784 free(printklist->printk);
6786 printklist = printknext;
6789 for (i = 0; i < pevent->nr_events; i++)
6790 pevent_free_format(pevent->events[i]);
6792 while (pevent->handlers) {
6793 handle = pevent->handlers;
6794 pevent->handlers = handle->next;
6795 free_handler(handle);
6798 free(pevent->trace_clock);
6799 free(pevent->events);
6800 free(pevent->sort_events);
6801 free(pevent->func_resolver);
6806 void pevent_unref(struct pevent *pevent)
6808 pevent_free(pevent);