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 <linux/string.h>
36 #include <linux/time64.h>
38 #include <netinet/in.h>
39 #include "event-parse.h"
40 #include "event-utils.h"
42 static const char *input_buf;
43 static unsigned long long input_buf_ptr;
44 static unsigned long long input_buf_siz;
46 static int is_flag_field;
47 static int is_symbolic_field;
49 static int show_warning = 1;
51 #define do_warning(fmt, ...) \
54 warning(fmt, ##__VA_ARGS__); \
57 #define do_warning_event(event, fmt, ...) \
63 warning("[%s:%s] " fmt, event->system, \
64 event->name, ##__VA_ARGS__); \
66 warning(fmt, ##__VA_ARGS__); \
69 static void init_input_buf(const char *buf, unsigned long long size)
76 const char *pevent_get_input_buf(void)
81 unsigned long long pevent_get_input_buf_ptr(void)
86 struct event_handler {
87 struct event_handler *next;
90 const char *event_name;
91 pevent_event_handler_func func;
95 struct pevent_func_params {
96 struct pevent_func_params *next;
97 enum pevent_func_arg_type type;
100 struct pevent_function_handler {
101 struct pevent_function_handler *next;
102 enum pevent_func_arg_type ret_type;
104 pevent_func_handler func;
105 struct pevent_func_params *params;
109 static unsigned long long
110 process_defined_func(struct trace_seq *s, void *data, int size,
111 struct event_format *event, struct print_arg *arg);
113 static void free_func_handle(struct pevent_function_handler *func);
116 * pevent_buffer_init - init buffer for parsing
117 * @buf: buffer to parse
118 * @size: the size of the buffer
120 * For use with pevent_read_token(), this initializes the internal
121 * buffer that pevent_read_token() will parse.
123 void pevent_buffer_init(const char *buf, unsigned long long size)
125 init_input_buf(buf, size);
128 void breakpoint(void)
134 struct print_arg *alloc_arg(void)
136 return calloc(1, sizeof(struct print_arg));
144 static int cmdline_cmp(const void *a, const void *b)
146 const struct cmdline *ca = a;
147 const struct cmdline *cb = b;
149 if (ca->pid < cb->pid)
151 if (ca->pid > cb->pid)
157 struct cmdline_list {
158 struct cmdline_list *next;
163 static int cmdline_init(struct pevent *pevent)
165 struct cmdline_list *cmdlist = pevent->cmdlist;
166 struct cmdline_list *item;
167 struct cmdline *cmdlines;
170 cmdlines = malloc(sizeof(*cmdlines) * pevent->cmdline_count);
176 cmdlines[i].pid = cmdlist->pid;
177 cmdlines[i].comm = cmdlist->comm;
180 cmdlist = cmdlist->next;
184 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
186 pevent->cmdlines = cmdlines;
187 pevent->cmdlist = NULL;
192 static const char *find_cmdline(struct pevent *pevent, int pid)
194 const struct cmdline *comm;
200 if (!pevent->cmdlines && cmdline_init(pevent))
201 return "<not enough memory for cmdlines!>";
205 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
206 sizeof(*pevent->cmdlines), cmdline_cmp);
214 * pevent_pid_is_registered - return if a pid has a cmdline registered
215 * @pevent: handle for the pevent
216 * @pid: The pid to check if it has a cmdline registered with.
218 * Returns 1 if the pid has a cmdline mapped to it
221 int pevent_pid_is_registered(struct pevent *pevent, int pid)
223 const struct cmdline *comm;
229 if (!pevent->cmdlines && cmdline_init(pevent))
234 comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
235 sizeof(*pevent->cmdlines), cmdline_cmp);
243 * If the command lines have been converted to an array, then
244 * we must add this pid. This is much slower than when cmdlines
245 * are added before the array is initialized.
247 static int add_new_comm(struct pevent *pevent, const char *comm, int pid)
249 struct cmdline *cmdlines = pevent->cmdlines;
250 const struct cmdline *cmdline;
256 /* avoid duplicates */
259 cmdline = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
260 sizeof(*pevent->cmdlines), cmdline_cmp);
266 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (pevent->cmdline_count + 1));
272 cmdlines[pevent->cmdline_count].comm = strdup(comm);
273 if (!cmdlines[pevent->cmdline_count].comm) {
279 cmdlines[pevent->cmdline_count].pid = pid;
281 if (cmdlines[pevent->cmdline_count].comm)
282 pevent->cmdline_count++;
284 qsort(cmdlines, pevent->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
285 pevent->cmdlines = cmdlines;
291 * pevent_register_comm - register a pid / comm mapping
292 * @pevent: handle for the pevent
293 * @comm: the command line to register
294 * @pid: the pid to map the command line to
296 * This adds a mapping to search for command line names with
297 * a given pid. The comm is duplicated.
299 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
301 struct cmdline_list *item;
303 if (pevent->cmdlines)
304 return add_new_comm(pevent, comm, pid);
306 item = malloc(sizeof(*item));
311 item->comm = strdup(comm);
313 item->comm = strdup("<...>");
319 item->next = pevent->cmdlist;
321 pevent->cmdlist = item;
322 pevent->cmdline_count++;
327 int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock)
329 pevent->trace_clock = strdup(trace_clock);
330 if (!pevent->trace_clock) {
338 unsigned long long addr;
344 struct func_list *next;
345 unsigned long long addr;
350 static int func_cmp(const void *a, const void *b)
352 const struct func_map *fa = a;
353 const struct func_map *fb = b;
355 if (fa->addr < fb->addr)
357 if (fa->addr > fb->addr)
364 * We are searching for a record in between, not an exact
367 static int func_bcmp(const void *a, const void *b)
369 const struct func_map *fa = a;
370 const struct func_map *fb = b;
372 if ((fa->addr == fb->addr) ||
374 (fa->addr > fb->addr &&
375 fa->addr < (fb+1)->addr))
378 if (fa->addr < fb->addr)
384 static int func_map_init(struct pevent *pevent)
386 struct func_list *funclist;
387 struct func_list *item;
388 struct func_map *func_map;
391 func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
395 funclist = pevent->funclist;
399 func_map[i].func = funclist->func;
400 func_map[i].addr = funclist->addr;
401 func_map[i].mod = funclist->mod;
404 funclist = funclist->next;
408 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
411 * Add a special record at the end.
413 func_map[pevent->func_count].func = NULL;
414 func_map[pevent->func_count].addr = 0;
415 func_map[pevent->func_count].mod = NULL;
417 pevent->func_map = func_map;
418 pevent->funclist = NULL;
423 static struct func_map *
424 __find_func(struct pevent *pevent, unsigned long long addr)
426 struct func_map *func;
429 if (!pevent->func_map)
430 func_map_init(pevent);
434 func = bsearch(&key, pevent->func_map, pevent->func_count,
435 sizeof(*pevent->func_map), func_bcmp);
440 struct func_resolver {
441 pevent_func_resolver_t *func;
447 * pevent_set_function_resolver - set an alternative function resolver
448 * @pevent: handle for the pevent
449 * @resolver: function to be used
450 * @priv: resolver function private state.
452 * Some tools may have already a way to resolve kernel functions, allow them to
453 * keep using it instead of duplicating all the entries inside
456 int pevent_set_function_resolver(struct pevent *pevent,
457 pevent_func_resolver_t *func, void *priv)
459 struct func_resolver *resolver = malloc(sizeof(*resolver));
461 if (resolver == NULL)
464 resolver->func = func;
465 resolver->priv = priv;
467 free(pevent->func_resolver);
468 pevent->func_resolver = resolver;
474 * pevent_reset_function_resolver - reset alternative function resolver
475 * @pevent: handle for the pevent
477 * Stop using whatever alternative resolver was set, use the default
480 void pevent_reset_function_resolver(struct pevent *pevent)
482 free(pevent->func_resolver);
483 pevent->func_resolver = NULL;
486 static struct func_map *
487 find_func(struct pevent *pevent, unsigned long long addr)
489 struct func_map *map;
491 if (!pevent->func_resolver)
492 return __find_func(pevent, addr);
494 map = &pevent->func_resolver->map;
497 map->func = pevent->func_resolver->func(pevent->func_resolver->priv,
498 &map->addr, &map->mod);
499 if (map->func == NULL)
506 * pevent_find_function - find a function by a given address
507 * @pevent: handle for the pevent
508 * @addr: the address to find the function with
510 * Returns a pointer to the function stored that has the given
511 * address. Note, the address does not have to be exact, it
512 * will select the function that would contain the address.
514 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
516 struct func_map *map;
518 map = find_func(pevent, addr);
526 * pevent_find_function_address - find a function address by a given address
527 * @pevent: handle for the pevent
528 * @addr: the address to find the function with
530 * Returns the address the function starts at. This can be used in
531 * conjunction with pevent_find_function to print both the function
532 * name and the function offset.
535 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
537 struct func_map *map;
539 map = find_func(pevent, addr);
547 * pevent_register_function - register a function with a given address
548 * @pevent: handle for the pevent
549 * @function: the function name to register
550 * @addr: the address the function starts at
551 * @mod: the kernel module the function may be in (NULL for none)
553 * This registers a function name with an address and module.
554 * The @func passed in is duplicated.
556 int pevent_register_function(struct pevent *pevent, char *func,
557 unsigned long long addr, char *mod)
559 struct func_list *item = malloc(sizeof(*item));
564 item->next = pevent->funclist;
565 item->func = strdup(func);
570 item->mod = strdup(mod);
577 pevent->funclist = item;
578 pevent->func_count++;
592 * pevent_print_funcs - print out the stored functions
593 * @pevent: handle for the pevent
595 * This prints out the stored functions.
597 void pevent_print_funcs(struct pevent *pevent)
601 if (!pevent->func_map)
602 func_map_init(pevent);
604 for (i = 0; i < (int)pevent->func_count; i++) {
606 pevent->func_map[i].addr,
607 pevent->func_map[i].func);
608 if (pevent->func_map[i].mod)
609 printf(" [%s]\n", pevent->func_map[i].mod);
616 unsigned long long addr;
621 struct printk_list *next;
622 unsigned long long addr;
626 static int printk_cmp(const void *a, const void *b)
628 const struct printk_map *pa = a;
629 const struct printk_map *pb = b;
631 if (pa->addr < pb->addr)
633 if (pa->addr > pb->addr)
639 static int printk_map_init(struct pevent *pevent)
641 struct printk_list *printklist;
642 struct printk_list *item;
643 struct printk_map *printk_map;
646 printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
650 printklist = pevent->printklist;
654 printk_map[i].printk = printklist->printk;
655 printk_map[i].addr = printklist->addr;
658 printklist = printklist->next;
662 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
664 pevent->printk_map = printk_map;
665 pevent->printklist = NULL;
670 static struct printk_map *
671 find_printk(struct pevent *pevent, unsigned long long addr)
673 struct printk_map *printk;
674 struct printk_map key;
676 if (!pevent->printk_map && printk_map_init(pevent))
681 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
682 sizeof(*pevent->printk_map), printk_cmp);
688 * pevent_register_print_string - register a string by its address
689 * @pevent: handle for the pevent
690 * @fmt: the string format to register
691 * @addr: the address the string was located at
693 * This registers a string by the address it was stored in the kernel.
694 * The @fmt passed in is duplicated.
696 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
697 unsigned long long addr)
699 struct printk_list *item = malloc(sizeof(*item));
705 item->next = pevent->printklist;
708 /* Strip off quotes and '\n' from the end */
711 item->printk = strdup(fmt);
715 p = item->printk + strlen(item->printk) - 1;
720 if (strcmp(p, "\\n") == 0)
723 pevent->printklist = item;
724 pevent->printk_count++;
735 * pevent_print_printk - print out the stored strings
736 * @pevent: handle for the pevent
738 * This prints the string formats that were stored.
740 void pevent_print_printk(struct pevent *pevent)
744 if (!pevent->printk_map)
745 printk_map_init(pevent);
747 for (i = 0; i < (int)pevent->printk_count; i++) {
748 printf("%016llx %s\n",
749 pevent->printk_map[i].addr,
750 pevent->printk_map[i].printk);
754 static struct event_format *alloc_event(void)
756 return calloc(1, sizeof(struct event_format));
759 static int add_event(struct pevent *pevent, struct event_format *event)
762 struct event_format **events = realloc(pevent->events, sizeof(event) *
763 (pevent->nr_events + 1));
767 pevent->events = events;
769 for (i = 0; i < pevent->nr_events; i++) {
770 if (pevent->events[i]->id > event->id)
773 if (i < pevent->nr_events)
774 memmove(&pevent->events[i + 1],
776 sizeof(event) * (pevent->nr_events - i));
778 pevent->events[i] = event;
781 event->pevent = pevent;
786 static int event_item_type(enum event_type type)
789 case EVENT_ITEM ... EVENT_SQUOTE:
791 case EVENT_ERROR ... EVENT_DELIM:
797 static void free_flag_sym(struct print_flag_sym *fsym)
799 struct print_flag_sym *next;
810 static void free_arg(struct print_arg *arg)
812 struct print_arg *farg;
819 free(arg->atom.atom);
822 free(arg->field.name);
825 free_arg(arg->flags.field);
826 free(arg->flags.delim);
827 free_flag_sym(arg->flags.flags);
830 free_arg(arg->symbol.field);
831 free_flag_sym(arg->symbol.symbols);
835 free_arg(arg->hex.field);
836 free_arg(arg->hex.size);
838 case PRINT_INT_ARRAY:
839 free_arg(arg->int_array.field);
840 free_arg(arg->int_array.count);
841 free_arg(arg->int_array.el_size);
844 free(arg->typecast.type);
845 free_arg(arg->typecast.item);
849 free(arg->string.string);
852 free(arg->bitmask.bitmask);
854 case PRINT_DYNAMIC_ARRAY:
855 case PRINT_DYNAMIC_ARRAY_LEN:
856 free(arg->dynarray.index);
860 free_arg(arg->op.left);
861 free_arg(arg->op.right);
864 while (arg->func.args) {
865 farg = arg->func.args;
866 arg->func.args = farg->next;
879 static enum event_type get_type(int ch)
882 return EVENT_NEWLINE;
885 if (isalnum(ch) || ch == '_')
893 if (ch == '(' || ch == ')' || ch == ',')
899 static int __read_char(void)
901 if (input_buf_ptr >= input_buf_siz)
904 return input_buf[input_buf_ptr++];
907 static int __peek_char(void)
909 if (input_buf_ptr >= input_buf_siz)
912 return input_buf[input_buf_ptr];
916 * pevent_peek_char - peek at the next character that will be read
918 * Returns the next character read, or -1 if end of buffer.
920 int pevent_peek_char(void)
922 return __peek_char();
925 static int extend_token(char **tok, char *buf, int size)
927 char *newtok = realloc(*tok, size);
944 static enum event_type force_token(const char *str, char **tok);
946 static enum event_type __read_token(char **tok)
949 int ch, last_ch, quote_ch, next_ch;
952 enum event_type type;
962 if (type == EVENT_NONE)
970 if (asprintf(tok, "%c", ch) < 0)
978 next_ch = __peek_char();
979 if (next_ch == '>') {
980 buf[i++] = __read_char();
993 buf[i++] = __read_char();
1005 default: /* what should we do instead? */
1015 buf[i++] = __read_char();
1020 /* don't keep quotes */
1026 if (i == (BUFSIZ - 1)) {
1030 if (extend_token(tok, buf, tok_size) < 0)
1037 /* the '\' '\' will cancel itself */
1038 if (ch == '\\' && last_ch == '\\')
1040 } while (ch != quote_ch || last_ch == '\\');
1041 /* remove the last quote */
1045 * For strings (double quotes) check the next token.
1046 * If it is another string, concatinate the two.
1048 if (type == EVENT_DQUOTE) {
1049 unsigned long long save_input_buf_ptr = input_buf_ptr;
1053 } while (isspace(ch));
1056 input_buf_ptr = save_input_buf_ptr;
1061 case EVENT_ERROR ... EVENT_SPACE:
1067 while (get_type(__peek_char()) == type) {
1068 if (i == (BUFSIZ - 1)) {
1072 if (extend_token(tok, buf, tok_size) < 0)
1082 if (extend_token(tok, buf, tok_size + i + 1) < 0)
1085 if (type == EVENT_ITEM) {
1087 * Older versions of the kernel has a bug that
1088 * creates invalid symbols and will break the mac80211
1089 * parsing. This is a work around to that bug.
1091 * See Linux kernel commit:
1092 * 811cb50baf63461ce0bdb234927046131fc7fa8b
1094 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
1097 return force_token("\"%s\" ", tok);
1098 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
1101 return force_token("\" sta:%pM\" ", tok);
1102 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
1105 return force_token("\" vif:%p(%d)\" ", tok);
1112 static enum event_type force_token(const char *str, char **tok)
1114 const char *save_input_buf;
1115 unsigned long long save_input_buf_ptr;
1116 unsigned long long save_input_buf_siz;
1117 enum event_type type;
1119 /* save off the current input pointers */
1120 save_input_buf = input_buf;
1121 save_input_buf_ptr = input_buf_ptr;
1122 save_input_buf_siz = input_buf_siz;
1124 init_input_buf(str, strlen(str));
1126 type = __read_token(tok);
1128 /* reset back to original token */
1129 input_buf = save_input_buf;
1130 input_buf_ptr = save_input_buf_ptr;
1131 input_buf_siz = save_input_buf_siz;
1136 static void free_token(char *tok)
1142 static enum event_type read_token(char **tok)
1144 enum event_type type;
1147 type = __read_token(tok);
1148 if (type != EVENT_SPACE)
1160 * pevent_read_token - access to utilites to use the pevent parser
1161 * @tok: The token to return
1163 * This will parse tokens from the string given by
1164 * pevent_init_data().
1166 * Returns the token type.
1168 enum event_type pevent_read_token(char **tok)
1170 return read_token(tok);
1174 * pevent_free_token - free a token returned by pevent_read_token
1175 * @token: the token to free
1177 void pevent_free_token(char *token)
1183 static enum event_type read_token_item(char **tok)
1185 enum event_type type;
1188 type = __read_token(tok);
1189 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1200 static int test_type(enum event_type type, enum event_type expect)
1202 if (type != expect) {
1203 do_warning("Error: expected type %d but read %d",
1210 static int test_type_token(enum event_type type, const char *token,
1211 enum event_type expect, const char *expect_tok)
1213 if (type != expect) {
1214 do_warning("Error: expected type %d but read %d",
1219 if (strcmp(token, expect_tok) != 0) {
1220 do_warning("Error: expected '%s' but read '%s'",
1227 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1229 enum event_type type;
1232 type = read_token(tok);
1234 type = read_token_item(tok);
1235 return test_type(type, expect);
1238 static int read_expect_type(enum event_type expect, char **tok)
1240 return __read_expect_type(expect, tok, 1);
1243 static int __read_expected(enum event_type expect, const char *str,
1246 enum event_type type;
1251 type = read_token(&token);
1253 type = read_token_item(&token);
1255 ret = test_type_token(type, token, expect, str);
1262 static int read_expected(enum event_type expect, const char *str)
1264 return __read_expected(expect, str, 1);
1267 static int read_expected_item(enum event_type expect, const char *str)
1269 return __read_expected(expect, str, 0);
1272 static char *event_read_name(void)
1276 if (read_expected(EVENT_ITEM, "name") < 0)
1279 if (read_expected(EVENT_OP, ":") < 0)
1282 if (read_expect_type(EVENT_ITEM, &token) < 0)
1292 static int event_read_id(void)
1297 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1300 if (read_expected(EVENT_OP, ":") < 0)
1303 if (read_expect_type(EVENT_ITEM, &token) < 0)
1306 id = strtoul(token, NULL, 0);
1315 static int field_is_string(struct format_field *field)
1317 if ((field->flags & FIELD_IS_ARRAY) &&
1318 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1319 strstr(field->type, "s8")))
1325 static int field_is_dynamic(struct format_field *field)
1327 if (strncmp(field->type, "__data_loc", 10) == 0)
1333 static int field_is_long(struct format_field *field)
1335 /* includes long long */
1336 if (strstr(field->type, "long"))
1342 static unsigned int type_size(const char *name)
1344 /* This covers all FIELD_IS_STRING types. */
1362 for (i = 0; table[i].type; i++) {
1363 if (!strcmp(table[i].type, name))
1364 return table[i].size;
1370 static int event_read_fields(struct event_format *event, struct format_field **fields)
1372 struct format_field *field = NULL;
1373 enum event_type type;
1379 unsigned int size_dynamic = 0;
1381 type = read_token(&token);
1382 if (type == EVENT_NEWLINE) {
1389 if (test_type_token(type, token, EVENT_ITEM, "field"))
1393 type = read_token(&token);
1395 * The ftrace fields may still use the "special" name.
1398 if (event->flags & EVENT_FL_ISFTRACE &&
1399 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1401 type = read_token(&token);
1404 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1408 if (read_expect_type(EVENT_ITEM, &token) < 0)
1413 field = calloc(1, sizeof(*field));
1417 field->event = event;
1419 /* read the rest of the type */
1421 type = read_token(&token);
1422 if (type == EVENT_ITEM ||
1423 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1425 * Some of the ftrace fields are broken and have
1426 * an illegal "." in them.
1428 (event->flags & EVENT_FL_ISFTRACE &&
1429 type == EVENT_OP && strcmp(token, ".") == 0)) {
1431 if (strcmp(token, "*") == 0)
1432 field->flags |= FIELD_IS_POINTER;
1436 new_type = realloc(field->type,
1437 strlen(field->type) +
1438 strlen(last_token) + 2);
1443 field->type = new_type;
1444 strcat(field->type, " ");
1445 strcat(field->type, last_token);
1448 field->type = last_token;
1457 do_warning_event(event, "%s: no type found", __func__);
1460 field->name = field->alias = last_token;
1462 if (test_type(type, EVENT_OP))
1465 if (strcmp(token, "[") == 0) {
1466 enum event_type last_type = type;
1467 char *brackets = token;
1471 field->flags |= FIELD_IS_ARRAY;
1473 type = read_token(&token);
1475 if (type == EVENT_ITEM)
1476 field->arraylen = strtoul(token, NULL, 0);
1478 field->arraylen = 0;
1480 while (strcmp(token, "]") != 0) {
1481 if (last_type == EVENT_ITEM &&
1488 new_brackets = realloc(brackets,
1490 strlen(token) + len);
1491 if (!new_brackets) {
1495 brackets = new_brackets;
1497 strcat(brackets, " ");
1498 strcat(brackets, token);
1499 /* We only care about the last token */
1500 field->arraylen = strtoul(token, NULL, 0);
1502 type = read_token(&token);
1503 if (type == EVENT_NONE) {
1504 do_warning_event(event, "failed to find token");
1511 new_brackets = realloc(brackets, strlen(brackets) + 2);
1512 if (!new_brackets) {
1516 brackets = new_brackets;
1517 strcat(brackets, "]");
1519 /* add brackets to type */
1521 type = read_token(&token);
1523 * If the next token is not an OP, then it is of
1524 * the format: type [] item;
1526 if (type == EVENT_ITEM) {
1528 new_type = realloc(field->type,
1529 strlen(field->type) +
1530 strlen(field->name) +
1531 strlen(brackets) + 2);
1536 field->type = new_type;
1537 strcat(field->type, " ");
1538 strcat(field->type, field->name);
1539 size_dynamic = type_size(field->name);
1540 free_token(field->name);
1541 strcat(field->type, brackets);
1542 field->name = field->alias = token;
1543 type = read_token(&token);
1546 new_type = realloc(field->type,
1547 strlen(field->type) +
1548 strlen(brackets) + 1);
1553 field->type = new_type;
1554 strcat(field->type, brackets);
1559 if (field_is_string(field))
1560 field->flags |= FIELD_IS_STRING;
1561 if (field_is_dynamic(field))
1562 field->flags |= FIELD_IS_DYNAMIC;
1563 if (field_is_long(field))
1564 field->flags |= FIELD_IS_LONG;
1566 if (test_type_token(type, token, EVENT_OP, ";"))
1570 if (read_expected(EVENT_ITEM, "offset") < 0)
1573 if (read_expected(EVENT_OP, ":") < 0)
1576 if (read_expect_type(EVENT_ITEM, &token))
1578 field->offset = strtoul(token, NULL, 0);
1581 if (read_expected(EVENT_OP, ";") < 0)
1584 if (read_expected(EVENT_ITEM, "size") < 0)
1587 if (read_expected(EVENT_OP, ":") < 0)
1590 if (read_expect_type(EVENT_ITEM, &token))
1592 field->size = strtoul(token, NULL, 0);
1595 if (read_expected(EVENT_OP, ";") < 0)
1598 type = read_token(&token);
1599 if (type != EVENT_NEWLINE) {
1600 /* newer versions of the kernel have a "signed" type */
1601 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1606 if (read_expected(EVENT_OP, ":") < 0)
1609 if (read_expect_type(EVENT_ITEM, &token))
1612 if (strtoul(token, NULL, 0))
1613 field->flags |= FIELD_IS_SIGNED;
1616 if (read_expected(EVENT_OP, ";") < 0)
1619 if (read_expect_type(EVENT_NEWLINE, &token))
1625 if (field->flags & FIELD_IS_ARRAY) {
1626 if (field->arraylen)
1627 field->elementsize = field->size / field->arraylen;
1628 else if (field->flags & FIELD_IS_DYNAMIC)
1629 field->elementsize = size_dynamic;
1630 else if (field->flags & FIELD_IS_STRING)
1631 field->elementsize = 1;
1632 else if (field->flags & FIELD_IS_LONG)
1633 field->elementsize = event->pevent ?
1634 event->pevent->long_size :
1637 field->elementsize = field->size;
1640 fields = &field->next;
1657 static int event_read_format(struct event_format *event)
1662 if (read_expected_item(EVENT_ITEM, "format") < 0)
1665 if (read_expected(EVENT_OP, ":") < 0)
1668 if (read_expect_type(EVENT_NEWLINE, &token))
1672 ret = event_read_fields(event, &event->format.common_fields);
1675 event->format.nr_common = ret;
1677 ret = event_read_fields(event, &event->format.fields);
1680 event->format.nr_fields = ret;
1689 static enum event_type
1690 process_arg_token(struct event_format *event, struct print_arg *arg,
1691 char **tok, enum event_type type);
1693 static enum event_type
1694 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1696 enum event_type type;
1699 type = read_token(&token);
1702 return process_arg_token(event, arg, tok, type);
1705 static enum event_type
1706 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1709 * For __print_symbolic() and __print_flags, we need to completely
1710 * evaluate the first argument, which defines what to print next.
1712 static enum event_type
1713 process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
1715 enum event_type type;
1717 type = process_arg(event, arg, tok);
1719 while (type == EVENT_OP) {
1720 type = process_op(event, arg, tok);
1726 static enum event_type
1727 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1729 struct print_arg *arg, *left, *right;
1730 enum event_type type;
1735 right = alloc_arg();
1737 if (!arg || !left || !right) {
1738 do_warning_event(event, "%s: not enough memory!", __func__);
1739 /* arg will be freed at out_free */
1745 arg->type = PRINT_OP;
1746 arg->op.left = left;
1747 arg->op.right = right;
1750 type = process_arg(event, left, &token);
1753 if (type == EVENT_ERROR)
1756 /* Handle other operations in the arguments */
1757 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1758 type = process_op(event, left, &token);
1762 if (test_type_token(type, token, EVENT_OP, ":"))
1767 type = process_arg(event, right, &token);
1769 top->op.right = arg;
1775 /* Top may point to itself */
1776 top->op.right = NULL;
1782 static enum event_type
1783 process_array(struct event_format *event, struct print_arg *top, char **tok)
1785 struct print_arg *arg;
1786 enum event_type type;
1791 do_warning_event(event, "%s: not enough memory!", __func__);
1792 /* '*tok' is set to top->op.op. No need to free. */
1798 type = process_arg(event, arg, &token);
1799 if (test_type_token(type, token, EVENT_OP, "]"))
1802 top->op.right = arg;
1805 type = read_token_item(&token);
1816 static int get_op_prio(char *op)
1830 /* '>>' and '<<' are 8 */
1834 /* '==' and '!=' are 10 */
1844 do_warning("unknown op '%c'", op[0]);
1848 if (strcmp(op, "++") == 0 ||
1849 strcmp(op, "--") == 0) {
1851 } else if (strcmp(op, ">>") == 0 ||
1852 strcmp(op, "<<") == 0) {
1854 } else if (strcmp(op, ">=") == 0 ||
1855 strcmp(op, "<=") == 0) {
1857 } else if (strcmp(op, "==") == 0 ||
1858 strcmp(op, "!=") == 0) {
1860 } else if (strcmp(op, "&&") == 0) {
1862 } else if (strcmp(op, "||") == 0) {
1865 do_warning("unknown op '%s'", op);
1871 static int set_op_prio(struct print_arg *arg)
1874 /* single ops are the greatest */
1875 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1878 arg->op.prio = get_op_prio(arg->op.op);
1880 return arg->op.prio;
1883 /* Note, *tok does not get freed, but will most likely be saved */
1884 static enum event_type
1885 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1887 struct print_arg *left, *right = NULL;
1888 enum event_type type;
1891 /* the op is passed in via tok */
1894 if (arg->type == PRINT_OP && !arg->op.left) {
1895 /* handle single op */
1897 do_warning_event(event, "bad op token %s", token);
1907 do_warning_event(event, "bad op token %s", token);
1912 /* make an empty left */
1917 left->type = PRINT_NULL;
1918 arg->op.left = left;
1920 right = alloc_arg();
1924 arg->op.right = right;
1926 /* do not free the token, it belongs to an op */
1928 type = process_arg(event, right, tok);
1930 } else if (strcmp(token, "?") == 0) {
1936 /* copy the top arg to the left */
1939 arg->type = PRINT_OP;
1941 arg->op.left = left;
1944 /* it will set arg->op.right */
1945 type = process_cond(event, arg, tok);
1947 } else if (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 ||
1961 strcmp(token, "<=") == 0 ||
1962 strcmp(token, ">=") == 0 ||
1963 strcmp(token, "==") == 0 ||
1964 strcmp(token, "!=") == 0) {
1970 /* copy the top arg to the left */
1973 arg->type = PRINT_OP;
1975 arg->op.left = left;
1976 arg->op.right = NULL;
1978 if (set_op_prio(arg) == -1) {
1979 event->flags |= EVENT_FL_FAILED;
1980 /* arg->op.op (= token) will be freed at out_free */
1985 type = read_token_item(&token);
1988 /* could just be a type pointer */
1989 if ((strcmp(arg->op.op, "*") == 0) &&
1990 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1993 if (left->type != PRINT_ATOM) {
1994 do_warning_event(event, "bad pointer type");
1997 new_atom = realloc(left->atom.atom,
1998 strlen(left->atom.atom) + 3);
2002 left->atom.atom = new_atom;
2003 strcat(left->atom.atom, " *");
2011 right = alloc_arg();
2015 type = process_arg_token(event, right, tok, type);
2016 if (type == EVENT_ERROR) {
2018 /* token was freed in process_arg_token() via *tok */
2023 if (right->type == PRINT_OP &&
2024 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2025 struct print_arg tmp;
2027 /* rotate ops according to the priority */
2028 arg->op.right = right->op.left;
2034 arg->op.left = right;
2036 arg->op.right = right;
2039 } else if (strcmp(token, "[") == 0) {
2047 arg->type = PRINT_OP;
2049 arg->op.left = left;
2053 /* it will set arg->op.right */
2054 type = process_array(event, arg, tok);
2057 do_warning_event(event, "unknown op '%s'", token);
2058 event->flags |= EVENT_FL_FAILED;
2059 /* the arg is now the left side */
2063 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
2066 /* higher prios need to be closer to the root */
2067 prio = get_op_prio(*tok);
2069 if (prio > arg->op.prio)
2070 return process_op(event, arg, tok);
2072 return process_op(event, right, tok);
2078 do_warning_event(event, "%s: not enough memory!", __func__);
2085 static enum event_type
2086 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
2089 enum event_type type;
2093 if (read_expected(EVENT_OP, "->") < 0)
2096 if (read_expect_type(EVENT_ITEM, &token) < 0)
2100 arg->type = PRINT_FIELD;
2101 arg->field.name = field;
2103 if (is_flag_field) {
2104 arg->field.field = pevent_find_any_field(event, arg->field.name);
2105 arg->field.field->flags |= FIELD_IS_FLAG;
2107 } else if (is_symbolic_field) {
2108 arg->field.field = pevent_find_any_field(event, arg->field.name);
2109 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
2110 is_symbolic_field = 0;
2113 type = read_token(&token);
2125 static int alloc_and_process_delim(struct event_format *event, char *next_token,
2126 struct print_arg **print_arg)
2128 struct print_arg *field;
2129 enum event_type type;
2133 field = alloc_arg();
2135 do_warning_event(event, "%s: not enough memory!", __func__);
2140 type = process_arg(event, field, &token);
2142 if (test_type_token(type, token, EVENT_DELIM, next_token)) {
2146 goto out_free_token;
2157 static char *arg_eval (struct print_arg *arg);
2159 static unsigned long long
2160 eval_type_str(unsigned long long val, const char *type, int pointer)
2170 if (type[len-1] != '*') {
2171 do_warning("pointer expected with non pointer type");
2177 do_warning("%s: not enough memory!", __func__);
2180 memcpy(ref, type, len);
2182 /* chop off the " *" */
2185 val = eval_type_str(val, ref, 0);
2190 /* check if this is a pointer */
2191 if (type[len - 1] == '*')
2194 /* Try to figure out the arg size*/
2195 if (strncmp(type, "struct", 6) == 0)
2199 if (strcmp(type, "u8") == 0)
2202 if (strcmp(type, "u16") == 0)
2203 return val & 0xffff;
2205 if (strcmp(type, "u32") == 0)
2206 return val & 0xffffffff;
2208 if (strcmp(type, "u64") == 0 ||
2209 strcmp(type, "s64"))
2212 if (strcmp(type, "s8") == 0)
2213 return (unsigned long long)(char)val & 0xff;
2215 if (strcmp(type, "s16") == 0)
2216 return (unsigned long long)(short)val & 0xffff;
2218 if (strcmp(type, "s32") == 0)
2219 return (unsigned long long)(int)val & 0xffffffff;
2221 if (strncmp(type, "unsigned ", 9) == 0) {
2226 if (strcmp(type, "char") == 0) {
2228 return (unsigned long long)(char)val & 0xff;
2233 if (strcmp(type, "short") == 0) {
2235 return (unsigned long long)(short)val & 0xffff;
2237 return val & 0xffff;
2240 if (strcmp(type, "int") == 0) {
2242 return (unsigned long long)(int)val & 0xffffffff;
2244 return val & 0xffffffff;
2251 * Try to figure out the type.
2253 static unsigned long long
2254 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
2256 if (arg->type != PRINT_TYPE) {
2257 do_warning("expected type argument");
2261 return eval_type_str(val, arg->typecast.type, pointer);
2264 static int arg_num_eval(struct print_arg *arg, long long *val)
2266 long long left, right;
2269 switch (arg->type) {
2271 *val = strtoll(arg->atom.atom, NULL, 0);
2274 ret = arg_num_eval(arg->typecast.item, val);
2277 *val = eval_type(*val, arg, 0);
2280 switch (arg->op.op[0]) {
2282 ret = arg_num_eval(arg->op.left, &left);
2285 ret = arg_num_eval(arg->op.right, &right);
2289 *val = left || right;
2291 *val = left | right;
2294 ret = arg_num_eval(arg->op.left, &left);
2297 ret = arg_num_eval(arg->op.right, &right);
2301 *val = left && right;
2303 *val = left & right;
2306 ret = arg_num_eval(arg->op.left, &left);
2309 ret = arg_num_eval(arg->op.right, &right);
2312 switch (arg->op.op[1]) {
2314 *val = left < right;
2317 *val = left << right;
2320 *val = left <= right;
2323 do_warning("unknown op '%s'", arg->op.op);
2328 ret = arg_num_eval(arg->op.left, &left);
2331 ret = arg_num_eval(arg->op.right, &right);
2334 switch (arg->op.op[1]) {
2336 *val = left > right;
2339 *val = left >> right;
2342 *val = left >= right;
2345 do_warning("unknown op '%s'", arg->op.op);
2350 ret = arg_num_eval(arg->op.left, &left);
2353 ret = arg_num_eval(arg->op.right, &right);
2357 if (arg->op.op[1] != '=') {
2358 do_warning("unknown op '%s'", arg->op.op);
2361 *val = left == right;
2364 ret = arg_num_eval(arg->op.left, &left);
2367 ret = arg_num_eval(arg->op.right, &right);
2371 switch (arg->op.op[1]) {
2373 *val = left != right;
2376 do_warning("unknown op '%s'", arg->op.op);
2381 /* check for negative */
2382 if (arg->op.left->type == PRINT_NULL)
2385 ret = arg_num_eval(arg->op.left, &left);
2388 ret = arg_num_eval(arg->op.right, &right);
2391 *val = left - right;
2394 if (arg->op.left->type == PRINT_NULL)
2397 ret = arg_num_eval(arg->op.left, &left);
2400 ret = arg_num_eval(arg->op.right, &right);
2403 *val = left + right;
2406 ret = arg_num_eval(arg->op.right, &right);
2412 do_warning("unknown op '%s'", arg->op.op);
2418 case PRINT_FIELD ... PRINT_SYMBOL:
2423 do_warning("invalid eval type %d", arg->type);
2430 static char *arg_eval (struct print_arg *arg)
2433 static char buf[20];
2435 switch (arg->type) {
2437 return arg->atom.atom;
2439 return arg_eval(arg->typecast.item);
2441 if (!arg_num_eval(arg, &val))
2443 sprintf(buf, "%lld", val);
2447 case PRINT_FIELD ... PRINT_SYMBOL:
2452 do_warning("invalid eval type %d", arg->type);
2459 static enum event_type
2460 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2462 enum event_type type;
2463 struct print_arg *arg = NULL;
2464 struct print_flag_sym *field;
2470 type = read_token_item(&token);
2471 if (test_type_token(type, token, EVENT_OP, "{"))
2479 type = process_arg(event, arg, &token);
2481 if (type == EVENT_OP)
2482 type = process_op(event, arg, &token);
2484 if (type == EVENT_ERROR)
2487 if (test_type_token(type, token, EVENT_DELIM, ","))
2490 field = calloc(1, sizeof(*field));
2494 value = arg_eval(arg);
2496 goto out_free_field;
2497 field->value = strdup(value);
2498 if (field->value == NULL)
2499 goto out_free_field;
2507 type = process_arg(event, arg, &token);
2508 if (test_type_token(type, token, EVENT_OP, "}"))
2509 goto out_free_field;
2511 value = arg_eval(arg);
2513 goto out_free_field;
2514 field->str = strdup(value);
2515 if (field->str == NULL)
2516 goto out_free_field;
2521 list = &field->next;
2524 type = read_token_item(&token);
2525 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2531 free_flag_sym(field);
2540 static enum event_type
2541 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2543 struct print_arg *field;
2544 enum event_type type;
2547 memset(arg, 0, sizeof(*arg));
2548 arg->type = PRINT_FLAGS;
2550 field = alloc_arg();
2552 do_warning_event(event, "%s: not enough memory!", __func__);
2556 type = process_field_arg(event, field, &token);
2558 /* Handle operations in the first argument */
2559 while (type == EVENT_OP)
2560 type = process_op(event, field, &token);
2562 if (test_type_token(type, token, EVENT_DELIM, ","))
2563 goto out_free_field;
2566 arg->flags.field = field;
2568 type = read_token_item(&token);
2569 if (event_item_type(type)) {
2570 arg->flags.delim = token;
2571 type = read_token_item(&token);
2574 if (test_type_token(type, token, EVENT_DELIM, ","))
2577 type = process_fields(event, &arg->flags.flags, &token);
2578 if (test_type_token(type, token, EVENT_DELIM, ")"))
2582 type = read_token_item(tok);
2593 static enum event_type
2594 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2596 struct print_arg *field;
2597 enum event_type type;
2600 memset(arg, 0, sizeof(*arg));
2601 arg->type = PRINT_SYMBOL;
2603 field = alloc_arg();
2605 do_warning_event(event, "%s: not enough memory!", __func__);
2609 type = process_field_arg(event, field, &token);
2611 if (test_type_token(type, token, EVENT_DELIM, ","))
2612 goto out_free_field;
2614 arg->symbol.field = field;
2616 type = process_fields(event, &arg->symbol.symbols, &token);
2617 if (test_type_token(type, token, EVENT_DELIM, ")"))
2621 type = read_token_item(tok);
2632 static enum event_type
2633 process_hex_common(struct event_format *event, struct print_arg *arg,
2634 char **tok, enum print_arg_type type)
2636 memset(arg, 0, sizeof(*arg));
2639 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2642 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2645 return read_token_item(tok);
2648 free_arg(arg->hex.field);
2649 arg->hex.field = NULL;
2655 static enum event_type
2656 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2658 return process_hex_common(event, arg, tok, PRINT_HEX);
2661 static enum event_type
2662 process_hex_str(struct event_format *event, struct print_arg *arg,
2665 return process_hex_common(event, arg, tok, PRINT_HEX_STR);
2668 static enum event_type
2669 process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
2671 memset(arg, 0, sizeof(*arg));
2672 arg->type = PRINT_INT_ARRAY;
2674 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2677 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2680 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2683 return read_token_item(tok);
2686 free_arg(arg->int_array.count);
2687 arg->int_array.count = NULL;
2689 free_arg(arg->int_array.field);
2690 arg->int_array.field = NULL;
2696 static enum event_type
2697 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2699 struct format_field *field;
2700 enum event_type type;
2703 memset(arg, 0, sizeof(*arg));
2704 arg->type = PRINT_DYNAMIC_ARRAY;
2707 * The item within the parenthesis is another field that holds
2708 * the index into where the array starts.
2710 type = read_token(&token);
2712 if (type != EVENT_ITEM)
2715 /* Find the field */
2717 field = pevent_find_field(event, token);
2721 arg->dynarray.field = field;
2722 arg->dynarray.index = 0;
2724 if (read_expected(EVENT_DELIM, ")") < 0)
2728 type = read_token_item(&token);
2730 if (type != EVENT_OP || strcmp(token, "[") != 0)
2736 do_warning_event(event, "%s: not enough memory!", __func__);
2741 type = process_arg(event, arg, &token);
2742 if (type == EVENT_ERROR)
2745 if (!test_type_token(type, token, EVENT_OP, "]"))
2749 type = read_token_item(tok);
2760 static enum event_type
2761 process_dynamic_array_len(struct event_format *event, struct print_arg *arg,
2764 struct format_field *field;
2765 enum event_type type;
2768 if (read_expect_type(EVENT_ITEM, &token) < 0)
2771 arg->type = PRINT_DYNAMIC_ARRAY_LEN;
2773 /* Find the field */
2774 field = pevent_find_field(event, token);
2778 arg->dynarray.field = field;
2779 arg->dynarray.index = 0;
2781 if (read_expected(EVENT_DELIM, ")") < 0)
2784 type = read_token(&token);
2796 static enum event_type
2797 process_paren(struct event_format *event, struct print_arg *arg, char **tok)
2799 struct print_arg *item_arg;
2800 enum event_type type;
2803 type = process_arg(event, arg, &token);
2805 if (type == EVENT_ERROR)
2808 if (type == EVENT_OP)
2809 type = process_op(event, arg, &token);
2811 if (type == EVENT_ERROR)
2814 if (test_type_token(type, token, EVENT_DELIM, ")"))
2818 type = read_token_item(&token);
2821 * If the next token is an item or another open paren, then
2822 * this was a typecast.
2824 if (event_item_type(type) ||
2825 (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
2827 /* make this a typecast and contine */
2829 /* prevous must be an atom */
2830 if (arg->type != PRINT_ATOM) {
2831 do_warning_event(event, "previous needed to be PRINT_ATOM");
2835 item_arg = alloc_arg();
2837 do_warning_event(event, "%s: not enough memory!",
2842 arg->type = PRINT_TYPE;
2843 arg->typecast.type = arg->atom.atom;
2844 arg->typecast.item = item_arg;
2845 type = process_arg_token(event, item_arg, &token, type);
2859 static enum event_type
2860 process_str(struct event_format *event __maybe_unused, struct print_arg *arg,
2863 enum event_type type;
2866 if (read_expect_type(EVENT_ITEM, &token) < 0)
2869 arg->type = PRINT_STRING;
2870 arg->string.string = token;
2871 arg->string.offset = -1;
2873 if (read_expected(EVENT_DELIM, ")") < 0)
2876 type = read_token(&token);
2888 static enum event_type
2889 process_bitmask(struct event_format *event __maybe_unused, struct print_arg *arg,
2892 enum event_type type;
2895 if (read_expect_type(EVENT_ITEM, &token) < 0)
2898 arg->type = PRINT_BITMASK;
2899 arg->bitmask.bitmask = token;
2900 arg->bitmask.offset = -1;
2902 if (read_expected(EVENT_DELIM, ")") < 0)
2905 type = read_token(&token);
2917 static struct pevent_function_handler *
2918 find_func_handler(struct pevent *pevent, char *func_name)
2920 struct pevent_function_handler *func;
2925 for (func = pevent->func_handlers; func; func = func->next) {
2926 if (strcmp(func->name, func_name) == 0)
2933 static void remove_func_handler(struct pevent *pevent, char *func_name)
2935 struct pevent_function_handler *func;
2936 struct pevent_function_handler **next;
2938 next = &pevent->func_handlers;
2939 while ((func = *next)) {
2940 if (strcmp(func->name, func_name) == 0) {
2942 free_func_handle(func);
2949 static enum event_type
2950 process_func_handler(struct event_format *event, struct pevent_function_handler *func,
2951 struct print_arg *arg, char **tok)
2953 struct print_arg **next_arg;
2954 struct print_arg *farg;
2955 enum event_type type;
2959 arg->type = PRINT_FUNC;
2960 arg->func.func = func;
2964 next_arg = &(arg->func.args);
2965 for (i = 0; i < func->nr_args; i++) {
2968 do_warning_event(event, "%s: not enough memory!",
2973 type = process_arg(event, farg, &token);
2974 if (i < (func->nr_args - 1)) {
2975 if (type != EVENT_DELIM || strcmp(token, ",") != 0) {
2976 do_warning_event(event,
2977 "Error: function '%s()' expects %d arguments but event %s only uses %d",
2978 func->name, func->nr_args,
2979 event->name, i + 1);
2983 if (type != EVENT_DELIM || strcmp(token, ")") != 0) {
2984 do_warning_event(event,
2985 "Error: function '%s()' only expects %d arguments but event %s has more",
2986 func->name, func->nr_args, event->name);
2992 next_arg = &(farg->next);
2996 type = read_token(&token);
3007 static enum event_type
3008 process_function(struct event_format *event, struct print_arg *arg,
3009 char *token, char **tok)
3011 struct pevent_function_handler *func;
3013 if (strcmp(token, "__print_flags") == 0) {
3016 return process_flags(event, arg, tok);
3018 if (strcmp(token, "__print_symbolic") == 0) {
3020 is_symbolic_field = 1;
3021 return process_symbols(event, arg, tok);
3023 if (strcmp(token, "__print_hex") == 0) {
3025 return process_hex(event, arg, tok);
3027 if (strcmp(token, "__print_hex_str") == 0) {
3029 return process_hex_str(event, arg, tok);
3031 if (strcmp(token, "__print_array") == 0) {
3033 return process_int_array(event, arg, tok);
3035 if (strcmp(token, "__get_str") == 0) {
3037 return process_str(event, arg, tok);
3039 if (strcmp(token, "__get_bitmask") == 0) {
3041 return process_bitmask(event, arg, tok);
3043 if (strcmp(token, "__get_dynamic_array") == 0) {
3045 return process_dynamic_array(event, arg, tok);
3047 if (strcmp(token, "__get_dynamic_array_len") == 0) {
3049 return process_dynamic_array_len(event, arg, tok);
3052 func = find_func_handler(event->pevent, token);
3055 return process_func_handler(event, func, arg, tok);
3058 do_warning_event(event, "function %s not defined", token);
3063 static enum event_type
3064 process_arg_token(struct event_format *event, struct print_arg *arg,
3065 char **tok, enum event_type type)
3074 if (strcmp(token, "REC") == 0) {
3076 type = process_entry(event, arg, &token);
3080 /* test the next token */
3081 type = read_token_item(&token);
3084 * If the next token is a parenthesis, then this
3087 if (type == EVENT_DELIM && strcmp(token, "(") == 0) {
3090 /* this will free atom. */
3091 type = process_function(event, arg, atom, &token);
3094 /* atoms can be more than one token long */
3095 while (type == EVENT_ITEM) {
3097 new_atom = realloc(atom,
3098 strlen(atom) + strlen(token) + 2);
3107 strcat(atom, token);
3109 type = read_token_item(&token);
3112 arg->type = PRINT_ATOM;
3113 arg->atom.atom = atom;
3118 arg->type = PRINT_ATOM;
3119 arg->atom.atom = token;
3120 type = read_token_item(&token);
3123 if (strcmp(token, "(") == 0) {
3125 type = process_paren(event, arg, &token);
3129 /* handle single ops */
3130 arg->type = PRINT_OP;
3132 arg->op.left = NULL;
3133 type = process_op(event, arg, &token);
3135 /* On error, the op is freed */
3136 if (type == EVENT_ERROR)
3139 /* return error type if errored */
3142 case EVENT_ERROR ... EVENT_NEWLINE:
3144 do_warning_event(event, "unexpected type %d", type);
3152 static int event_read_print_args(struct event_format *event, struct print_arg **list)
3154 enum event_type type = EVENT_ERROR;
3155 struct print_arg *arg;
3160 if (type == EVENT_NEWLINE) {
3161 type = read_token_item(&token);
3167 do_warning_event(event, "%s: not enough memory!",
3172 type = process_arg(event, arg, &token);
3174 if (type == EVENT_ERROR) {
3183 if (type == EVENT_OP) {
3184 type = process_op(event, arg, &token);
3186 if (type == EVENT_ERROR) {
3195 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
3202 } while (type != EVENT_NONE);
3204 if (type != EVENT_NONE && type != EVENT_ERROR)
3210 static int event_read_print(struct event_format *event)
3212 enum event_type type;
3216 if (read_expected_item(EVENT_ITEM, "print") < 0)
3219 if (read_expected(EVENT_ITEM, "fmt") < 0)
3222 if (read_expected(EVENT_OP, ":") < 0)
3225 if (read_expect_type(EVENT_DQUOTE, &token) < 0)
3229 event->print_fmt.format = token;
3230 event->print_fmt.args = NULL;
3232 /* ok to have no arg */
3233 type = read_token_item(&token);
3235 if (type == EVENT_NONE)
3238 /* Handle concatenation of print lines */
3239 if (type == EVENT_DQUOTE) {
3242 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
3245 free_token(event->print_fmt.format);
3246 event->print_fmt.format = NULL;
3251 if (test_type_token(type, token, EVENT_DELIM, ","))
3256 ret = event_read_print_args(event, &event->print_fmt.args);
3268 * pevent_find_common_field - return a common field by event
3269 * @event: handle for the event
3270 * @name: the name of the common field to return
3272 * Returns a common field from the event by the given @name.
3273 * This only searchs the common fields and not all field.
3275 struct format_field *
3276 pevent_find_common_field(struct event_format *event, const char *name)
3278 struct format_field *format;
3280 for (format = event->format.common_fields;
3281 format; format = format->next) {
3282 if (strcmp(format->name, name) == 0)
3290 * pevent_find_field - find a non-common field
3291 * @event: handle for the event
3292 * @name: the name of the non-common field
3294 * Returns a non-common field by the given @name.
3295 * This does not search common fields.
3297 struct format_field *
3298 pevent_find_field(struct event_format *event, const char *name)
3300 struct format_field *format;
3302 for (format = event->format.fields;
3303 format; format = format->next) {
3304 if (strcmp(format->name, name) == 0)
3312 * pevent_find_any_field - find any field by name
3313 * @event: handle for the event
3314 * @name: the name of the field
3316 * Returns a field by the given @name.
3317 * This searchs the common field names first, then
3318 * the non-common ones if a common one was not found.
3320 struct format_field *
3321 pevent_find_any_field(struct event_format *event, const char *name)
3323 struct format_field *format;
3325 format = pevent_find_common_field(event, name);
3328 return pevent_find_field(event, name);
3332 * pevent_read_number - read a number from data
3333 * @pevent: handle for the pevent
3334 * @ptr: the raw data
3335 * @size: the size of the data that holds the number
3337 * Returns the number (converted to host) from the
3340 unsigned long long pevent_read_number(struct pevent *pevent,
3341 const void *ptr, int size)
3345 return *(unsigned char *)ptr;
3347 return data2host2(pevent, ptr);
3349 return data2host4(pevent, ptr);
3351 return data2host8(pevent, ptr);
3359 * pevent_read_number_field - read a number from data
3360 * @field: a handle to the field
3361 * @data: the raw data to read
3362 * @value: the value to place the number in
3364 * Reads raw data according to a field offset and size,
3365 * and translates it into @value.
3367 * Returns 0 on success, -1 otherwise.
3369 int pevent_read_number_field(struct format_field *field, const void *data,
3370 unsigned long long *value)
3374 switch (field->size) {
3379 *value = pevent_read_number(field->event->pevent,
3380 data + field->offset, field->size);
3387 static int get_common_info(struct pevent *pevent,
3388 const char *type, int *offset, int *size)
3390 struct event_format *event;
3391 struct format_field *field;
3394 * All events should have the same common elements.
3395 * Pick any event to find where the type is;
3397 if (!pevent->events) {
3398 do_warning("no event_list!");
3402 event = pevent->events[0];
3403 field = pevent_find_common_field(event, type);
3407 *offset = field->offset;
3408 *size = field->size;
3413 static int __parse_common(struct pevent *pevent, void *data,
3414 int *size, int *offset, const char *name)
3419 ret = get_common_info(pevent, name, offset, size);
3423 return pevent_read_number(pevent, data + *offset, *size);
3426 static int trace_parse_common_type(struct pevent *pevent, void *data)
3428 return __parse_common(pevent, data,
3429 &pevent->type_size, &pevent->type_offset,
3433 static int parse_common_pid(struct pevent *pevent, void *data)
3435 return __parse_common(pevent, data,
3436 &pevent->pid_size, &pevent->pid_offset,
3440 static int parse_common_pc(struct pevent *pevent, void *data)
3442 return __parse_common(pevent, data,
3443 &pevent->pc_size, &pevent->pc_offset,
3444 "common_preempt_count");
3447 static int parse_common_flags(struct pevent *pevent, void *data)
3449 return __parse_common(pevent, data,
3450 &pevent->flags_size, &pevent->flags_offset,
3454 static int parse_common_lock_depth(struct pevent *pevent, void *data)
3456 return __parse_common(pevent, data,
3457 &pevent->ld_size, &pevent->ld_offset,
3458 "common_lock_depth");
3461 static int parse_common_migrate_disable(struct pevent *pevent, void *data)
3463 return __parse_common(pevent, data,
3464 &pevent->ld_size, &pevent->ld_offset,
3465 "common_migrate_disable");
3468 static int events_id_cmp(const void *a, const void *b);
3471 * pevent_find_event - find an event by given id
3472 * @pevent: a handle to the pevent
3473 * @id: the id of the event
3475 * Returns an event that has a given @id.
3477 struct event_format *pevent_find_event(struct pevent *pevent, int id)
3479 struct event_format **eventptr;
3480 struct event_format key;
3481 struct event_format *pkey = &key;
3483 /* Check cache first */
3484 if (pevent->last_event && pevent->last_event->id == id)
3485 return pevent->last_event;
3489 eventptr = bsearch(&pkey, pevent->events, pevent->nr_events,
3490 sizeof(*pevent->events), events_id_cmp);
3493 pevent->last_event = *eventptr;
3501 * pevent_find_event_by_name - find an event by given name
3502 * @pevent: a handle to the pevent
3503 * @sys: the system name to search for
3504 * @name: the name of the event to search for
3506 * This returns an event with a given @name and under the system
3507 * @sys. If @sys is NULL the first event with @name is returned.
3509 struct event_format *
3510 pevent_find_event_by_name(struct pevent *pevent,
3511 const char *sys, const char *name)
3513 struct event_format *event;
3516 if (pevent->last_event &&
3517 strcmp(pevent->last_event->name, name) == 0 &&
3518 (!sys || strcmp(pevent->last_event->system, sys) == 0))
3519 return pevent->last_event;
3521 for (i = 0; i < pevent->nr_events; i++) {
3522 event = pevent->events[i];
3523 if (strcmp(event->name, name) == 0) {
3526 if (strcmp(event->system, sys) == 0)
3530 if (i == pevent->nr_events)
3533 pevent->last_event = event;
3537 static unsigned long long
3538 eval_num_arg(void *data, int size, struct event_format *event, struct print_arg *arg)
3540 struct pevent *pevent = event->pevent;
3541 unsigned long long val = 0;
3542 unsigned long long left, right;
3543 struct print_arg *typearg = NULL;
3544 struct print_arg *larg;
3545 unsigned long offset;
3546 unsigned int field_size;
3548 switch (arg->type) {
3553 return strtoull(arg->atom.atom, NULL, 0);
3555 if (!arg->field.field) {
3556 arg->field.field = pevent_find_any_field(event, arg->field.name);
3557 if (!arg->field.field)
3558 goto out_warning_field;
3561 /* must be a number */
3562 val = pevent_read_number(pevent, data + arg->field.field->offset,
3563 arg->field.field->size);
3567 case PRINT_INT_ARRAY:
3572 val = eval_num_arg(data, size, event, arg->typecast.item);
3573 return eval_type(val, arg, 0);
3581 val = process_defined_func(&s, data, size, event, arg);
3582 trace_seq_destroy(&s);
3586 if (strcmp(arg->op.op, "[") == 0) {
3588 * Arrays are special, since we don't want
3589 * to read the arg as is.
3591 right = eval_num_arg(data, size, event, arg->op.right);
3593 /* handle typecasts */
3594 larg = arg->op.left;
3595 while (larg->type == PRINT_TYPE) {
3598 larg = larg->typecast.item;
3601 /* Default to long size */
3602 field_size = pevent->long_size;
3604 switch (larg->type) {
3605 case PRINT_DYNAMIC_ARRAY:
3606 offset = pevent_read_number(pevent,
3607 data + larg->dynarray.field->offset,
3608 larg->dynarray.field->size);
3609 if (larg->dynarray.field->elementsize)
3610 field_size = larg->dynarray.field->elementsize;
3612 * The actual length of the dynamic array is stored
3613 * in the top half of the field, and the offset
3614 * is in the bottom half of the 32 bit field.
3620 if (!larg->field.field) {
3622 pevent_find_any_field(event, larg->field.name);
3623 if (!larg->field.field) {
3625 goto out_warning_field;
3628 field_size = larg->field.field->elementsize;
3629 offset = larg->field.field->offset +
3630 right * larg->field.field->elementsize;
3633 goto default_op; /* oops, all bets off */
3635 val = pevent_read_number(pevent,
3636 data + offset, field_size);
3638 val = eval_type(val, typearg, 1);
3640 } else if (strcmp(arg->op.op, "?") == 0) {
3641 left = eval_num_arg(data, size, event, arg->op.left);
3642 arg = arg->op.right;
3644 val = eval_num_arg(data, size, event, arg->op.left);
3646 val = eval_num_arg(data, size, event, arg->op.right);
3650 left = eval_num_arg(data, size, event, arg->op.left);
3651 right = eval_num_arg(data, size, event, arg->op.right);
3652 switch (arg->op.op[0]) {
3654 switch (arg->op.op[1]) {
3659 val = left != right;
3662 goto out_warning_op;
3670 val = left || right;
3676 val = left && right;
3681 switch (arg->op.op[1]) {
3686 val = left << right;
3689 val = left <= right;
3692 goto out_warning_op;
3696 switch (arg->op.op[1]) {
3701 val = left >> right;
3704 val = left >= right;
3707 goto out_warning_op;
3711 if (arg->op.op[1] != '=')
3712 goto out_warning_op;
3714 val = left == right;
3732 goto out_warning_op;
3735 case PRINT_DYNAMIC_ARRAY_LEN:
3736 offset = pevent_read_number(pevent,
3737 data + arg->dynarray.field->offset,
3738 arg->dynarray.field->size);
3740 * The total allocated length of the dynamic array is
3741 * stored in the top half of the field, and the offset
3742 * is in the bottom half of the 32 bit field.
3744 val = (unsigned long long)(offset >> 16);
3746 case PRINT_DYNAMIC_ARRAY:
3747 /* Without [], we pass the address to the dynamic data */
3748 offset = pevent_read_number(pevent,
3749 data + arg->dynarray.field->offset,
3750 arg->dynarray.field->size);
3752 * The total allocated length of the dynamic array is
3753 * stored in the top half of the field, and the offset
3754 * is in the bottom half of the 32 bit field.
3757 val = (unsigned long long)((unsigned long)data + offset);
3759 default: /* not sure what to do there */
3765 do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
3769 do_warning_event(event, "%s: field %s not found",
3770 __func__, arg->field.name);
3776 unsigned long long value;
3779 static const struct flag flags[] = {
3780 { "HI_SOFTIRQ", 0 },
3781 { "TIMER_SOFTIRQ", 1 },
3782 { "NET_TX_SOFTIRQ", 2 },
3783 { "NET_RX_SOFTIRQ", 3 },
3784 { "BLOCK_SOFTIRQ", 4 },
3785 { "IRQ_POLL_SOFTIRQ", 5 },
3786 { "TASKLET_SOFTIRQ", 6 },
3787 { "SCHED_SOFTIRQ", 7 },
3788 { "HRTIMER_SOFTIRQ", 8 },
3789 { "RCU_SOFTIRQ", 9 },
3791 { "HRTIMER_NORESTART", 0 },
3792 { "HRTIMER_RESTART", 1 },
3795 static long long eval_flag(const char *flag)
3800 * Some flags in the format files do not get converted.
3801 * If the flag is not numeric, see if it is something that
3802 * we already know about.
3804 if (isdigit(flag[0]))
3805 return strtoull(flag, NULL, 0);
3807 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3808 if (strcmp(flags[i].name, flag) == 0)
3809 return flags[i].value;
3814 static void print_str_to_seq(struct trace_seq *s, const char *format,
3815 int len_arg, const char *str)
3818 trace_seq_printf(s, format, len_arg, str);
3820 trace_seq_printf(s, format, str);
3823 static void print_bitmask_to_seq(struct pevent *pevent,
3824 struct trace_seq *s, const char *format,
3825 int len_arg, const void *data, int size)
3827 int nr_bits = size * 8;
3828 int str_size = (nr_bits + 3) / 4;
3836 * The kernel likes to put in commas every 32 bits, we
3839 str_size += (nr_bits - 1) / 32;
3841 str = malloc(str_size + 1);
3843 do_warning("%s: not enough memory!", __func__);
3848 /* Start out with -2 for the two chars per byte */
3849 for (i = str_size - 2; i >= 0; i -= 2) {
3851 * data points to a bit mask of size bytes.
3852 * In the kernel, this is an array of long words, thus
3853 * endianess is very important.
3855 if (pevent->file_bigendian)
3856 index = size - (len + 1);
3860 snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
3861 memcpy(str + i, buf, 2);
3863 if (!(len & 3) && i > 0) {
3870 trace_seq_printf(s, format, len_arg, str);
3872 trace_seq_printf(s, format, str);
3877 static void print_str_arg(struct trace_seq *s, void *data, int size,
3878 struct event_format *event, const char *format,
3879 int len_arg, struct print_arg *arg)
3881 struct pevent *pevent = event->pevent;
3882 struct print_flag_sym *flag;
3883 struct format_field *field;
3884 struct printk_map *printk;
3885 long long val, fval;
3886 unsigned long long addr;
3892 switch (arg->type) {
3897 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3900 field = arg->field.field;
3902 field = pevent_find_any_field(event, arg->field.name);
3904 str = arg->field.name;
3905 goto out_warning_field;
3907 arg->field.field = field;
3909 /* Zero sized fields, mean the rest of the data */
3910 len = field->size ? : size - field->offset;
3913 * Some events pass in pointers. If this is not an array
3914 * and the size is the same as long_size, assume that it
3917 if (!(field->flags & FIELD_IS_ARRAY) &&
3918 field->size == pevent->long_size) {
3920 /* Handle heterogeneous recording and processing
3924 * Traces recorded on 32-bit devices (32-bit
3925 * addressing) and processed on 64-bit devices:
3926 * In this case, only 32 bits should be read.
3929 * Traces recorded on 64 bit devices and processed
3930 * on 32-bit devices:
3931 * In this case, 64 bits must be read.
3933 addr = (pevent->long_size == 8) ?
3934 *(unsigned long long *)(data + field->offset) :
3935 (unsigned long long)*(unsigned int *)(data + field->offset);
3937 /* Check if it matches a print format */
3938 printk = find_printk(pevent, addr);
3940 trace_seq_puts(s, printk->printk);
3942 trace_seq_printf(s, "%llx", addr);
3945 str = malloc(len + 1);
3947 do_warning_event(event, "%s: not enough memory!",
3951 memcpy(str, data + field->offset, len);
3953 print_str_to_seq(s, format, len_arg, str);
3957 val = eval_num_arg(data, size, event, arg->flags.field);
3959 for (flag = arg->flags.flags; flag; flag = flag->next) {
3960 fval = eval_flag(flag->value);
3961 if (!val && fval < 0) {
3962 print_str_to_seq(s, format, len_arg, flag->str);
3965 if (fval > 0 && (val & fval) == fval) {
3966 if (print && arg->flags.delim)
3967 trace_seq_puts(s, arg->flags.delim);
3968 print_str_to_seq(s, format, len_arg, flag->str);
3974 if (print && arg->flags.delim)
3975 trace_seq_puts(s, arg->flags.delim);
3976 trace_seq_printf(s, "0x%llx", val);
3980 val = eval_num_arg(data, size, event, arg->symbol.field);
3981 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3982 fval = eval_flag(flag->value);
3984 print_str_to_seq(s, format, len_arg, flag->str);
3991 if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
3992 unsigned long offset;
3993 offset = pevent_read_number(pevent,
3994 data + arg->hex.field->dynarray.field->offset,
3995 arg->hex.field->dynarray.field->size);
3996 hex = data + (offset & 0xffff);
3998 field = arg->hex.field->field.field;
4000 str = arg->hex.field->field.name;
4001 field = pevent_find_any_field(event, str);
4003 goto out_warning_field;
4004 arg->hex.field->field.field = field;
4006 hex = data + field->offset;
4008 len = eval_num_arg(data, size, event, arg->hex.size);
4009 for (i = 0; i < len; i++) {
4010 if (i && arg->type == PRINT_HEX)
4011 trace_seq_putc(s, ' ');
4012 trace_seq_printf(s, "%02x", hex[i]);
4016 case PRINT_INT_ARRAY: {
4020 if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
4021 unsigned long offset;
4022 struct format_field *field =
4023 arg->int_array.field->dynarray.field;
4024 offset = pevent_read_number(pevent,
4025 data + field->offset,
4027 num = data + (offset & 0xffff);
4029 field = arg->int_array.field->field.field;
4031 str = arg->int_array.field->field.name;
4032 field = pevent_find_any_field(event, str);
4034 goto out_warning_field;
4035 arg->int_array.field->field.field = field;
4037 num = data + field->offset;
4039 len = eval_num_arg(data, size, event, arg->int_array.count);
4040 el_size = eval_num_arg(data, size, event,
4041 arg->int_array.el_size);
4042 for (i = 0; i < len; i++) {
4044 trace_seq_putc(s, ' ');
4047 trace_seq_printf(s, "%u", *(uint8_t *)num);
4048 } else if (el_size == 2) {
4049 trace_seq_printf(s, "%u", *(uint16_t *)num);
4050 } else if (el_size == 4) {
4051 trace_seq_printf(s, "%u", *(uint32_t *)num);
4052 } else if (el_size == 8) {
4053 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4055 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4056 el_size, *(uint8_t *)num);
4066 case PRINT_STRING: {
4069 if (arg->string.offset == -1) {
4070 struct format_field *f;
4072 f = pevent_find_any_field(event, arg->string.string);
4073 arg->string.offset = f->offset;
4075 str_offset = data2host4(pevent, data + arg->string.offset);
4076 str_offset &= 0xffff;
4077 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4081 print_str_to_seq(s, format, len_arg, arg->string.string);
4083 case PRINT_BITMASK: {
4087 if (arg->bitmask.offset == -1) {
4088 struct format_field *f;
4090 f = pevent_find_any_field(event, arg->bitmask.bitmask);
4091 arg->bitmask.offset = f->offset;
4093 bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
4094 bitmask_size = bitmask_offset >> 16;
4095 bitmask_offset &= 0xffff;
4096 print_bitmask_to_seq(pevent, s, format, len_arg,
4097 data + bitmask_offset, bitmask_size);
4102 * The only op for string should be ? :
4104 if (arg->op.op[0] != '?')
4106 val = eval_num_arg(data, size, event, arg->op.left);
4108 print_str_arg(s, data, size, event,
4109 format, len_arg, arg->op.right->op.left);
4111 print_str_arg(s, data, size, event,
4112 format, len_arg, arg->op.right->op.right);
4115 process_defined_func(s, data, size, event, arg);
4125 do_warning_event(event, "%s: field %s not found",
4126 __func__, arg->field.name);
4129 static unsigned long long
4130 process_defined_func(struct trace_seq *s, void *data, int size,
4131 struct event_format *event, struct print_arg *arg)
4133 struct pevent_function_handler *func_handle = arg->func.func;
4134 struct pevent_func_params *param;
4135 unsigned long long *args;
4136 unsigned long long ret;
4137 struct print_arg *farg;
4138 struct trace_seq str;
4140 struct save_str *next;
4142 } *strings = NULL, *string;
4145 if (!func_handle->nr_args) {
4146 ret = (*func_handle->func)(s, NULL);
4150 farg = arg->func.args;
4151 param = func_handle->params;
4154 args = malloc(sizeof(*args) * func_handle->nr_args);
4158 for (i = 0; i < func_handle->nr_args; i++) {
4159 switch (param->type) {
4160 case PEVENT_FUNC_ARG_INT:
4161 case PEVENT_FUNC_ARG_LONG:
4162 case PEVENT_FUNC_ARG_PTR:
4163 args[i] = eval_num_arg(data, size, event, farg);
4165 case PEVENT_FUNC_ARG_STRING:
4166 trace_seq_init(&str);
4167 print_str_arg(&str, data, size, event, "%s", -1, farg);
4168 trace_seq_terminate(&str);
4169 string = malloc(sizeof(*string));
4171 do_warning_event(event, "%s(%d): malloc str",
4172 __func__, __LINE__);
4175 string->next = strings;
4176 string->str = strdup(str.buffer);
4179 do_warning_event(event, "%s(%d): malloc str",
4180 __func__, __LINE__);
4183 args[i] = (uintptr_t)string->str;
4185 trace_seq_destroy(&str);
4189 * Something went totally wrong, this is not
4190 * an input error, something in this code broke.
4192 do_warning_event(event, "Unexpected end of arguments\n");
4196 param = param->next;
4199 ret = (*func_handle->func)(s, args);
4204 strings = string->next;
4210 /* TBD : handle return type here */
4214 static void free_args(struct print_arg *args)
4216 struct print_arg *next;
4226 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
4228 struct pevent *pevent = event->pevent;
4229 struct format_field *field, *ip_field;
4230 struct print_arg *args, *arg, **next;
4231 unsigned long long ip, val;
4236 field = pevent->bprint_buf_field;
4237 ip_field = pevent->bprint_ip_field;
4240 field = pevent_find_field(event, "buf");
4242 do_warning_event(event, "can't find buffer field for binary printk");
4245 ip_field = pevent_find_field(event, "ip");
4247 do_warning_event(event, "can't find ip field for binary printk");
4250 pevent->bprint_buf_field = field;
4251 pevent->bprint_ip_field = ip_field;
4254 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
4257 * The first arg is the IP pointer.
4261 do_warning_event(event, "%s(%d): not enough memory!",
4262 __func__, __LINE__);
4269 arg->type = PRINT_ATOM;
4271 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4274 /* skip the first "%ps: " */
4275 for (ptr = fmt + 5, bptr = data + field->offset;
4276 bptr < data + size && *ptr; ptr++) {
4311 vsize = pevent->long_size;
4325 /* the pointers are always 4 bytes aligned */
4326 bptr = (void *)(((unsigned long)bptr + 3) &
4328 val = pevent_read_number(pevent, bptr, vsize);
4332 do_warning_event(event, "%s(%d): not enough memory!",
4333 __func__, __LINE__);
4337 arg->type = PRINT_ATOM;
4338 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4345 * The '*' case means that an arg is used as the length.
4346 * We need to continue to figure out for what.
4355 do_warning_event(event, "%s(%d): not enough memory!",
4356 __func__, __LINE__);
4360 arg->type = PRINT_BSTRING;
4361 arg->string.string = strdup(bptr);
4362 if (!arg->string.string)
4364 bptr += strlen(bptr) + 1;
4381 get_bprint_format(void *data, int size __maybe_unused,
4382 struct event_format *event)
4384 struct pevent *pevent = event->pevent;
4385 unsigned long long addr;
4386 struct format_field *field;
4387 struct printk_map *printk;
4390 field = pevent->bprint_fmt_field;
4393 field = pevent_find_field(event, "fmt");
4395 do_warning_event(event, "can't find format field for binary printk");
4398 pevent->bprint_fmt_field = field;
4401 addr = pevent_read_number(pevent, data + field->offset, field->size);
4403 printk = find_printk(pevent, addr);
4405 if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4410 if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
4416 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4417 struct event_format *event, struct print_arg *arg)
4420 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4422 if (arg->type == PRINT_FUNC) {
4423 process_defined_func(s, data, size, event, arg);
4427 if (arg->type != PRINT_FIELD) {
4428 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4434 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4435 if (!arg->field.field) {
4437 pevent_find_any_field(event, arg->field.name);
4438 if (!arg->field.field) {
4439 do_warning_event(event, "%s: field %s not found",
4440 __func__, arg->field.name);
4444 if (arg->field.field->size != 6) {
4445 trace_seq_printf(s, "INVALIDMAC");
4448 buf = data + arg->field.field->offset;
4449 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4452 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4457 fmt = "%03d.%03d.%03d.%03d";
4459 fmt = "%d.%d.%d.%d";
4461 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4464 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4466 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4467 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4470 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4472 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4475 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4478 unsigned char zerolength[8];
4483 bool needcolon = false;
4485 struct in6_addr in6;
4487 memcpy(&in6, addr, sizeof(struct in6_addr));
4489 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4491 memset(zerolength, 0, sizeof(zerolength));
4498 /* find position of longest 0 run */
4499 for (i = 0; i < range; i++) {
4500 for (j = i; j < range; j++) {
4501 if (in6.s6_addr16[j] != 0)
4506 for (i = 0; i < range; i++) {
4507 if (zerolength[i] > longest) {
4508 longest = zerolength[i];
4512 if (longest == 1) /* don't compress a single 0 */
4516 for (i = 0; i < range; i++) {
4517 if (i == colonpos) {
4518 if (needcolon || i == 0)
4519 trace_seq_printf(s, ":");
4520 trace_seq_printf(s, ":");
4526 trace_seq_printf(s, ":");
4529 /* hex u16 without leading 0s */
4530 word = ntohs(in6.s6_addr16[i]);
4534 trace_seq_printf(s, "%x%02x", hi, lo);
4536 trace_seq_printf(s, "%x", lo);
4543 trace_seq_printf(s, ":");
4544 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4550 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4554 for (j = 0; j < 16; j += 2) {
4555 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4556 if (i == 'I' && j < 14)
4557 trace_seq_printf(s, ":");
4562 * %pi4 print an IPv4 address with leading zeros
4563 * %pI4 print an IPv4 address without leading zeros
4564 * %pi6 print an IPv6 address without colons
4565 * %pI6 print an IPv6 address with colons
4566 * %pI6c print an IPv6 address in compressed form with colons
4567 * %pISpc print an IP address based on sockaddr; p adds port.
4569 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4570 void *data, int size, struct event_format *event,
4571 struct print_arg *arg)
4575 if (arg->type == PRINT_FUNC) {
4576 process_defined_func(s, data, size, event, arg);
4580 if (arg->type != PRINT_FIELD) {
4581 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4585 if (!arg->field.field) {
4587 pevent_find_any_field(event, arg->field.name);
4588 if (!arg->field.field) {
4589 do_warning("%s: field %s not found",
4590 __func__, arg->field.name);
4595 buf = data + arg->field.field->offset;
4597 if (arg->field.field->size != 4) {
4598 trace_seq_printf(s, "INVALIDIPv4");
4601 print_ip4_addr(s, i, buf);
4606 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4607 void *data, int size, struct event_format *event,
4608 struct print_arg *arg)
4615 if (i == 'I' && *ptr == 'c') {
4621 if (arg->type == PRINT_FUNC) {
4622 process_defined_func(s, data, size, event, arg);
4626 if (arg->type != PRINT_FIELD) {
4627 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4631 if (!arg->field.field) {
4633 pevent_find_any_field(event, arg->field.name);
4634 if (!arg->field.field) {
4635 do_warning("%s: field %s not found",
4636 __func__, arg->field.name);
4641 buf = data + arg->field.field->offset;
4643 if (arg->field.field->size != 16) {
4644 trace_seq_printf(s, "INVALIDIPv6");
4649 print_ip6c_addr(s, buf);
4651 print_ip6_addr(s, i, buf);
4656 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4657 void *data, int size, struct event_format *event,
4658 struct print_arg *arg)
4660 char have_c = 0, have_p = 0;
4662 struct sockaddr_storage *sa;
4679 if (arg->type == PRINT_FUNC) {
4680 process_defined_func(s, data, size, event, arg);
4684 if (arg->type != PRINT_FIELD) {
4685 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4689 if (!arg->field.field) {
4691 pevent_find_any_field(event, arg->field.name);
4692 if (!arg->field.field) {
4693 do_warning("%s: field %s not found",
4694 __func__, arg->field.name);
4699 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4701 if (sa->ss_family == AF_INET) {
4702 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4704 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4705 trace_seq_printf(s, "INVALIDIPv4");
4709 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4711 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4714 } else if (sa->ss_family == AF_INET6) {
4715 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4717 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4718 trace_seq_printf(s, "INVALIDIPv6");
4723 trace_seq_printf(s, "[");
4725 buf = (unsigned char *) &sa6->sin6_addr;
4727 print_ip6c_addr(s, buf);
4729 print_ip6_addr(s, i, buf);
4732 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4738 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4739 void *data, int size, struct event_format *event,
4740 struct print_arg *arg)
4742 char i = *ptr; /* 'i' or 'I' */
4755 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4758 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4761 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4770 static int is_printable_array(char *p, unsigned int len)
4774 for (i = 0; i < len && p[i]; i++)
4775 if (!isprint(p[i]) && !isspace(p[i]))
4780 void pevent_print_field(struct trace_seq *s, void *data,
4781 struct format_field *field)
4783 unsigned long long val;
4784 unsigned int offset, len, i;
4785 struct pevent *pevent = field->event->pevent;
4787 if (field->flags & FIELD_IS_ARRAY) {
4788 offset = field->offset;
4790 if (field->flags & FIELD_IS_DYNAMIC) {
4791 val = pevent_read_number(pevent, data + offset, len);
4796 if (field->flags & FIELD_IS_STRING &&
4797 is_printable_array(data + offset, len)) {
4798 trace_seq_printf(s, "%s", (char *)data + offset);
4800 trace_seq_puts(s, "ARRAY[");
4801 for (i = 0; i < len; i++) {
4803 trace_seq_puts(s, ", ");
4804 trace_seq_printf(s, "%02x",
4805 *((unsigned char *)data + offset + i));
4807 trace_seq_putc(s, ']');
4808 field->flags &= ~FIELD_IS_STRING;
4811 val = pevent_read_number(pevent, data + field->offset,
4813 if (field->flags & FIELD_IS_POINTER) {
4814 trace_seq_printf(s, "0x%llx", val);
4815 } else if (field->flags & FIELD_IS_SIGNED) {
4816 switch (field->size) {
4819 * If field is long then print it in hex.
4820 * A long usually stores pointers.
4822 if (field->flags & FIELD_IS_LONG)
4823 trace_seq_printf(s, "0x%x", (int)val);
4825 trace_seq_printf(s, "%d", (int)val);
4828 trace_seq_printf(s, "%2d", (short)val);
4831 trace_seq_printf(s, "%1d", (char)val);
4834 trace_seq_printf(s, "%lld", val);
4837 if (field->flags & FIELD_IS_LONG)
4838 trace_seq_printf(s, "0x%llx", val);
4840 trace_seq_printf(s, "%llu", val);
4845 void pevent_print_fields(struct trace_seq *s, void *data,
4846 int size __maybe_unused, struct event_format *event)
4848 struct format_field *field;
4850 field = event->format.fields;
4852 trace_seq_printf(s, " %s=", field->name);
4853 pevent_print_field(s, data, field);
4854 field = field->next;
4858 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
4860 struct pevent *pevent = event->pevent;
4861 struct print_fmt *print_fmt = &event->print_fmt;
4862 struct print_arg *arg = print_fmt->args;
4863 struct print_arg *args = NULL;
4864 const char *ptr = print_fmt->format;
4865 unsigned long long val;
4866 struct func_map *func;
4867 const char *saveptr;
4869 char *bprint_fmt = NULL;
4877 if (event->flags & EVENT_FL_FAILED) {
4878 trace_seq_printf(s, "[FAILED TO PARSE]");
4879 pevent_print_fields(s, data, size, event);
4883 if (event->flags & EVENT_FL_ISBPRINT) {
4884 bprint_fmt = get_bprint_format(data, size, event);
4885 args = make_bprint_args(bprint_fmt, data, size, event);
4890 for (; *ptr; ptr++) {
4896 trace_seq_putc(s, '\n');
4899 trace_seq_putc(s, '\t');
4902 trace_seq_putc(s, '\r');
4905 trace_seq_putc(s, '\\');
4908 trace_seq_putc(s, *ptr);
4912 } else if (*ptr == '%') {
4920 trace_seq_putc(s, '%');
4923 /* FIXME: need to handle properly */
4935 /* The argument is the length. */
4937 do_warning_event(event, "no argument match");
4938 event->flags |= EVENT_FL_FAILED;
4941 len_arg = eval_num_arg(data, size, event, arg);
4952 if (pevent->long_size == 4)
4957 if (*(ptr+1) == 'F' || *(ptr+1) == 'f' ||
4958 *(ptr+1) == 'S' || *(ptr+1) == 's') {
4961 } else if (*(ptr+1) == 'M' || *(ptr+1) == 'm') {
4962 print_mac_arg(s, *(ptr+1), data, size, event, arg);
4966 } else if (*(ptr+1) == 'I' || *(ptr+1) == 'i') {
4969 n = print_ip_arg(s, ptr+1, data, size, event, arg);
4984 do_warning_event(event, "no argument match");
4985 event->flags |= EVENT_FL_FAILED;
4989 len = ((unsigned long)ptr + 1) -
4990 (unsigned long)saveptr;
4992 /* should never happen */
4994 do_warning_event(event, "bad format!");
4995 event->flags |= EVENT_FL_FAILED;
4999 memcpy(format, saveptr, len);
5002 val = eval_num_arg(data, size, event, arg);
5006 func = find_func(pevent, val);
5008 trace_seq_puts(s, func->func);
5009 if (show_func == 'F')
5016 if (pevent->long_size == 8 && ls == 1 &&
5017 sizeof(long) != 8) {
5020 /* make %l into %ll */
5021 if (ls == 1 && (p = strchr(format, 'l')))
5022 memmove(p+1, p, strlen(p)+1);
5023 else if (strcmp(format, "%p") == 0)
5024 strcpy(format, "0x%llx");
5030 trace_seq_printf(s, format, len_arg, (char)val);
5032 trace_seq_printf(s, format, (char)val);
5036 trace_seq_printf(s, format, len_arg, (short)val);
5038 trace_seq_printf(s, format, (short)val);
5042 trace_seq_printf(s, format, len_arg, (int)val);
5044 trace_seq_printf(s, format, (int)val);
5048 trace_seq_printf(s, format, len_arg, (long)val);
5050 trace_seq_printf(s, format, (long)val);
5054 trace_seq_printf(s, format, len_arg,
5057 trace_seq_printf(s, format, (long long)val);
5060 do_warning_event(event, "bad count (%d)", ls);
5061 event->flags |= EVENT_FL_FAILED;
5066 do_warning_event(event, "no matching argument");
5067 event->flags |= EVENT_FL_FAILED;
5071 len = ((unsigned long)ptr + 1) -
5072 (unsigned long)saveptr;
5074 /* should never happen */
5076 do_warning_event(event, "bad format!");
5077 event->flags |= EVENT_FL_FAILED;
5081 memcpy(format, saveptr, len);
5085 /* Use helper trace_seq */
5087 print_str_arg(&p, data, size, event,
5088 format, len_arg, arg);
5089 trace_seq_terminate(&p);
5090 trace_seq_puts(s, p.buffer);
5091 trace_seq_destroy(&p);
5095 trace_seq_printf(s, ">%c<", *ptr);
5099 trace_seq_putc(s, *ptr);
5102 if (event->flags & EVENT_FL_FAILED) {
5104 trace_seq_printf(s, "[FAILED TO PARSE]");
5114 * pevent_data_lat_fmt - parse the data for the latency format
5115 * @pevent: a handle to the pevent
5116 * @s: the trace_seq to write to
5117 * @record: the record to read from
5119 * This parses out the Latency format (interrupts disabled,
5120 * need rescheduling, in hard/soft interrupt, preempt count
5121 * and lock depth) and places it into the trace_seq.
5123 void pevent_data_lat_fmt(struct pevent *pevent,
5124 struct trace_seq *s, struct pevent_record *record)
5126 static int check_lock_depth = 1;
5127 static int check_migrate_disable = 1;
5128 static int lock_depth_exists;
5129 static int migrate_disable_exists;
5130 unsigned int lat_flags;
5133 int migrate_disable;
5136 void *data = record->data;
5138 lat_flags = parse_common_flags(pevent, data);
5139 pc = parse_common_pc(pevent, data);
5140 /* lock_depth may not always exist */
5141 if (lock_depth_exists)
5142 lock_depth = parse_common_lock_depth(pevent, data);
5143 else if (check_lock_depth) {
5144 lock_depth = parse_common_lock_depth(pevent, data);
5146 check_lock_depth = 0;
5148 lock_depth_exists = 1;
5151 /* migrate_disable may not always exist */
5152 if (migrate_disable_exists)
5153 migrate_disable = parse_common_migrate_disable(pevent, data);
5154 else if (check_migrate_disable) {
5155 migrate_disable = parse_common_migrate_disable(pevent, data);
5156 if (migrate_disable < 0)
5157 check_migrate_disable = 0;
5159 migrate_disable_exists = 1;
5162 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5163 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5165 trace_seq_printf(s, "%c%c%c",
5166 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5167 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5169 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5171 (hardirq && softirq) ? 'H' :
5172 hardirq ? 'h' : softirq ? 's' : '.');
5175 trace_seq_printf(s, "%x", pc);
5177 trace_seq_putc(s, '.');
5179 if (migrate_disable_exists) {
5180 if (migrate_disable < 0)
5181 trace_seq_putc(s, '.');
5183 trace_seq_printf(s, "%d", migrate_disable);
5186 if (lock_depth_exists) {
5188 trace_seq_putc(s, '.');
5190 trace_seq_printf(s, "%d", lock_depth);
5193 trace_seq_terminate(s);
5197 * pevent_data_type - parse out the given event type
5198 * @pevent: a handle to the pevent
5199 * @rec: the record to read from
5201 * This returns the event id from the @rec.
5203 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
5205 return trace_parse_common_type(pevent, rec->data);
5209 * pevent_data_event_from_type - find the event by a given type
5210 * @pevent: a handle to the pevent
5211 * @type: the type of the event.
5213 * This returns the event form a given @type;
5215 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
5217 return pevent_find_event(pevent, type);
5221 * pevent_data_pid - parse the PID from record
5222 * @pevent: a handle to the pevent
5223 * @rec: the record to parse
5225 * This returns the PID from a record.
5227 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
5229 return parse_common_pid(pevent, rec->data);
5233 * pevent_data_preempt_count - parse the preempt count from the record
5234 * @pevent: a handle to the pevent
5235 * @rec: the record to parse
5237 * This returns the preempt count from a record.
5239 int pevent_data_preempt_count(struct pevent *pevent, struct pevent_record *rec)
5241 return parse_common_pc(pevent, rec->data);
5245 * pevent_data_flags - parse the latency flags from the record
5246 * @pevent: a handle to the pevent
5247 * @rec: the record to parse
5249 * This returns the latency flags from a record.
5251 * Use trace_flag_type enum for the flags (see event-parse.h).
5253 int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec)
5255 return parse_common_flags(pevent, rec->data);
5259 * pevent_data_comm_from_pid - return the command line from PID
5260 * @pevent: a handle to the pevent
5261 * @pid: the PID of the task to search for
5263 * This returns a pointer to the command line that has the given
5266 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
5270 comm = find_cmdline(pevent, pid);
5274 static struct cmdline *
5275 pid_from_cmdlist(struct pevent *pevent, const char *comm, struct cmdline *next)
5277 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5280 cmdlist = cmdlist->next;
5282 cmdlist = pevent->cmdlist;
5284 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5285 cmdlist = cmdlist->next;
5287 return (struct cmdline *)cmdlist;
5291 * pevent_data_pid_from_comm - return the pid from a given comm
5292 * @pevent: a handle to the pevent
5293 * @comm: the cmdline to find the pid from
5294 * @next: the cmdline structure to find the next comm
5296 * This returns the cmdline structure that holds a pid for a given
5297 * comm, or NULL if none found. As there may be more than one pid for
5298 * a given comm, the result of this call can be passed back into
5299 * a recurring call in the @next paramater, and then it will find the
5301 * Also, it does a linear seach, so it may be slow.
5303 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
5304 struct cmdline *next)
5306 struct cmdline *cmdline;
5309 * If the cmdlines have not been converted yet, then use
5312 if (!pevent->cmdlines)
5313 return pid_from_cmdlist(pevent, comm, next);
5317 * The next pointer could have been still from
5318 * a previous call before cmdlines were created
5320 if (next < pevent->cmdlines ||
5321 next >= pevent->cmdlines + pevent->cmdline_count)
5328 cmdline = pevent->cmdlines;
5330 while (cmdline < pevent->cmdlines + pevent->cmdline_count) {
5331 if (strcmp(cmdline->comm, comm) == 0)
5339 * pevent_cmdline_pid - return the pid associated to a given cmdline
5340 * @cmdline: The cmdline structure to get the pid from
5342 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5345 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline)
5347 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5353 * If cmdlines have not been created yet, or cmdline is
5354 * not part of the array, then treat it as a cmdlist instead.
5356 if (!pevent->cmdlines ||
5357 cmdline < pevent->cmdlines ||
5358 cmdline >= pevent->cmdlines + pevent->cmdline_count)
5359 return cmdlist->pid;
5361 return cmdline->pid;
5365 * pevent_data_comm_from_pid - parse the data into the print format
5366 * @s: the trace_seq to write to
5367 * @event: the handle to the event
5368 * @record: the record to read from
5370 * This parses the raw @data using the given @event information and
5371 * writes the print format into the trace_seq.
5373 void pevent_event_info(struct trace_seq *s, struct event_format *event,
5374 struct pevent_record *record)
5376 int print_pretty = 1;
5378 if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
5379 pevent_print_fields(s, record->data, record->size, event);
5382 if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
5383 print_pretty = event->handler(s, record, event,
5387 pretty_print(s, record->data, record->size, event);
5390 trace_seq_terminate(s);
5393 static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
5395 if (!use_trace_clock)
5398 if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
5399 || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
5402 /* trace_clock is setting in tsc or counter mode */
5407 * pevent_find_event_by_record - return the event from a given record
5408 * @pevent: a handle to the pevent
5409 * @record: The record to get the event from
5411 * Returns the associated event for a given record, or NULL if non is
5414 struct event_format *
5415 pevent_find_event_by_record(struct pevent *pevent, struct pevent_record *record)
5419 if (record->size < 0) {
5420 do_warning("ug! negative record size %d", record->size);
5424 type = trace_parse_common_type(pevent, record->data);
5426 return pevent_find_event(pevent, type);
5430 * pevent_print_event_task - Write the event task comm, pid and CPU
5431 * @pevent: a handle to the pevent
5432 * @s: the trace_seq to write to
5433 * @event: the handle to the record's event
5434 * @record: The record to get the event from
5436 * Writes the tasks comm, pid and CPU to @s.
5438 void pevent_print_event_task(struct pevent *pevent, struct trace_seq *s,
5439 struct event_format *event,
5440 struct pevent_record *record)
5442 void *data = record->data;
5446 pid = parse_common_pid(pevent, data);
5447 comm = find_cmdline(pevent, pid);
5449 if (pevent->latency_format) {
5450 trace_seq_printf(s, "%8.8s-%-5d %3d",
5451 comm, pid, record->cpu);
5453 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
5457 * pevent_print_event_time - Write the event timestamp
5458 * @pevent: a handle to the pevent
5459 * @s: the trace_seq to write to
5460 * @event: the handle to the record's event
5461 * @record: The record to get the event from
5462 * @use_trace_clock: Set to parse according to the @pevent->trace_clock
5464 * Writes the timestamp of the record into @s.
5466 void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
5467 struct event_format *event,
5468 struct pevent_record *record,
5469 bool use_trace_clock)
5472 unsigned long usecs;
5473 unsigned long nsecs;
5475 bool use_usec_format;
5477 use_usec_format = is_timestamp_in_us(pevent->trace_clock,
5479 if (use_usec_format) {
5480 secs = record->ts / NSEC_PER_SEC;
5481 nsecs = record->ts - secs * NSEC_PER_SEC;
5484 if (pevent->latency_format) {
5485 pevent_data_lat_fmt(pevent, s, record);
5488 if (use_usec_format) {
5489 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
5493 usecs = (nsecs + 500) / NSEC_PER_USEC;
5494 /* To avoid usecs larger than 1 sec */
5495 if (usecs >= USEC_PER_SEC) {
5496 usecs -= USEC_PER_SEC;
5502 trace_seq_printf(s, " %5lu.%0*lu:", secs, p, usecs);
5504 trace_seq_printf(s, " %12llu:", record->ts);
5508 * pevent_print_event_data - Write the event data section
5509 * @pevent: a handle to the pevent
5510 * @s: the trace_seq to write to
5511 * @event: the handle to the record's event
5512 * @record: The record to get the event from
5514 * Writes the parsing of the record's data to @s.
5516 void pevent_print_event_data(struct pevent *pevent, struct trace_seq *s,
5517 struct event_format *event,
5518 struct pevent_record *record)
5520 static const char *spaces = " "; /* 20 spaces */
5523 trace_seq_printf(s, " %s: ", event->name);
5525 /* Space out the event names evenly. */
5526 len = strlen(event->name);
5528 trace_seq_printf(s, "%.*s", 20 - len, spaces);
5530 pevent_event_info(s, event, record);
5533 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
5534 struct pevent_record *record, bool use_trace_clock)
5536 struct event_format *event;
5538 event = pevent_find_event_by_record(pevent, record);
5540 do_warning("ug! no event found for type %d",
5541 trace_parse_common_type(pevent, record->data));
5545 pevent_print_event_task(pevent, s, event, record);
5546 pevent_print_event_time(pevent, s, event, record, use_trace_clock);
5547 pevent_print_event_data(pevent, s, event, record);
5550 static int events_id_cmp(const void *a, const void *b)
5552 struct event_format * const * ea = a;
5553 struct event_format * const * eb = b;
5555 if ((*ea)->id < (*eb)->id)
5558 if ((*ea)->id > (*eb)->id)
5564 static int events_name_cmp(const void *a, const void *b)
5566 struct event_format * const * ea = a;
5567 struct event_format * const * eb = b;
5570 res = strcmp((*ea)->name, (*eb)->name);
5574 res = strcmp((*ea)->system, (*eb)->system);
5578 return events_id_cmp(a, b);
5581 static int events_system_cmp(const void *a, const void *b)
5583 struct event_format * const * ea = a;
5584 struct event_format * const * eb = b;
5587 res = strcmp((*ea)->system, (*eb)->system);
5591 res = strcmp((*ea)->name, (*eb)->name);
5595 return events_id_cmp(a, b);
5598 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
5600 struct event_format **events;
5601 int (*sort)(const void *a, const void *b);
5603 events = pevent->sort_events;
5605 if (events && pevent->last_type == sort_type)
5609 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
5613 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
5614 events[pevent->nr_events] = NULL;
5616 pevent->sort_events = events;
5618 /* the internal events are sorted by id */
5619 if (sort_type == EVENT_SORT_ID) {
5620 pevent->last_type = sort_type;
5625 switch (sort_type) {
5627 sort = events_id_cmp;
5629 case EVENT_SORT_NAME:
5630 sort = events_name_cmp;
5632 case EVENT_SORT_SYSTEM:
5633 sort = events_system_cmp;
5639 qsort(events, pevent->nr_events, sizeof(*events), sort);
5640 pevent->last_type = sort_type;
5645 static struct format_field **
5646 get_event_fields(const char *type, const char *name,
5647 int count, struct format_field *list)
5649 struct format_field **fields;
5650 struct format_field *field;
5653 fields = malloc(sizeof(*fields) * (count + 1));
5657 for (field = list; field; field = field->next) {
5658 fields[i++] = field;
5659 if (i == count + 1) {
5660 do_warning("event %s has more %s fields than specified",
5668 do_warning("event %s has less %s fields than specified",
5677 * pevent_event_common_fields - return a list of common fields for an event
5678 * @event: the event to return the common fields of.
5680 * Returns an allocated array of fields. The last item in the array is NULL.
5681 * The array must be freed with free().
5683 struct format_field **pevent_event_common_fields(struct event_format *event)
5685 return get_event_fields("common", event->name,
5686 event->format.nr_common,
5687 event->format.common_fields);
5691 * pevent_event_fields - return a list of event specific fields for an event
5692 * @event: the event to return the fields of.
5694 * Returns an allocated array of fields. The last item in the array is NULL.
5695 * The array must be freed with free().
5697 struct format_field **pevent_event_fields(struct event_format *event)
5699 return get_event_fields("event", event->name,
5700 event->format.nr_fields,
5701 event->format.fields);
5704 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
5706 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5708 trace_seq_puts(s, ", ");
5709 print_fields(s, field->next);
5714 static void print_args(struct print_arg *args)
5716 int print_paren = 1;
5719 switch (args->type) {
5724 printf("%s", args->atom.atom);
5727 printf("REC->%s", args->field.name);
5730 printf("__print_flags(");
5731 print_args(args->flags.field);
5732 printf(", %s, ", args->flags.delim);
5734 print_fields(&s, args->flags.flags);
5735 trace_seq_do_printf(&s);
5736 trace_seq_destroy(&s);
5740 printf("__print_symbolic(");
5741 print_args(args->symbol.field);
5744 print_fields(&s, args->symbol.symbols);
5745 trace_seq_do_printf(&s);
5746 trace_seq_destroy(&s);
5750 printf("__print_hex(");
5751 print_args(args->hex.field);
5753 print_args(args->hex.size);
5757 printf("__print_hex_str(");
5758 print_args(args->hex.field);
5760 print_args(args->hex.size);
5763 case PRINT_INT_ARRAY:
5764 printf("__print_array(");
5765 print_args(args->int_array.field);
5767 print_args(args->int_array.count);
5769 print_args(args->int_array.el_size);
5774 printf("__get_str(%s)", args->string.string);
5777 printf("__get_bitmask(%s)", args->bitmask.bitmask);
5780 printf("(%s)", args->typecast.type);
5781 print_args(args->typecast.item);
5784 if (strcmp(args->op.op, ":") == 0)
5788 print_args(args->op.left);
5789 printf(" %s ", args->op.op);
5790 print_args(args->op.right);
5795 /* we should warn... */
5800 print_args(args->next);
5804 static void parse_header_field(const char *field,
5805 int *offset, int *size, int mandatory)
5807 unsigned long long save_input_buf_ptr;
5808 unsigned long long save_input_buf_siz;
5812 save_input_buf_ptr = input_buf_ptr;
5813 save_input_buf_siz = input_buf_siz;
5815 if (read_expected(EVENT_ITEM, "field") < 0)
5817 if (read_expected(EVENT_OP, ":") < 0)
5821 if (read_expect_type(EVENT_ITEM, &token) < 0)
5826 * If this is not a mandatory field, then test it first.
5829 if (read_expected(EVENT_ITEM, field) < 0)
5832 if (read_expect_type(EVENT_ITEM, &token) < 0)
5834 if (strcmp(token, field) != 0)
5839 if (read_expected(EVENT_OP, ";") < 0)
5841 if (read_expected(EVENT_ITEM, "offset") < 0)
5843 if (read_expected(EVENT_OP, ":") < 0)
5845 if (read_expect_type(EVENT_ITEM, &token) < 0)
5847 *offset = atoi(token);
5849 if (read_expected(EVENT_OP, ";") < 0)
5851 if (read_expected(EVENT_ITEM, "size") < 0)
5853 if (read_expected(EVENT_OP, ":") < 0)
5855 if (read_expect_type(EVENT_ITEM, &token) < 0)
5857 *size = atoi(token);
5859 if (read_expected(EVENT_OP, ";") < 0)
5861 type = read_token(&token);
5862 if (type != EVENT_NEWLINE) {
5863 /* newer versions of the kernel have a "signed" type */
5864 if (type != EVENT_ITEM)
5867 if (strcmp(token, "signed") != 0)
5872 if (read_expected(EVENT_OP, ":") < 0)
5875 if (read_expect_type(EVENT_ITEM, &token))
5879 if (read_expected(EVENT_OP, ";") < 0)
5882 if (read_expect_type(EVENT_NEWLINE, &token))
5890 input_buf_ptr = save_input_buf_ptr;
5891 input_buf_siz = save_input_buf_siz;
5898 * pevent_parse_header_page - parse the data stored in the header page
5899 * @pevent: the handle to the pevent
5900 * @buf: the buffer storing the header page format string
5901 * @size: the size of @buf
5902 * @long_size: the long size to use if there is no header
5904 * This parses the header page format for information on the
5905 * ring buffer used. The @buf should be copied from
5907 * /sys/kernel/debug/tracing/events/header_page
5909 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
5916 * Old kernels did not have header page info.
5917 * Sorry but we just use what we find here in user space.
5919 pevent->header_page_ts_size = sizeof(long long);
5920 pevent->header_page_size_size = long_size;
5921 pevent->header_page_data_offset = sizeof(long long) + long_size;
5922 pevent->old_format = 1;
5925 init_input_buf(buf, size);
5927 parse_header_field("timestamp", &pevent->header_page_ts_offset,
5928 &pevent->header_page_ts_size, 1);
5929 parse_header_field("commit", &pevent->header_page_size_offset,
5930 &pevent->header_page_size_size, 1);
5931 parse_header_field("overwrite", &pevent->header_page_overwrite,
5933 parse_header_field("data", &pevent->header_page_data_offset,
5934 &pevent->header_page_data_size, 1);
5939 static int event_matches(struct event_format *event,
5940 int id, const char *sys_name,
5941 const char *event_name)
5943 if (id >= 0 && id != event->id)
5946 if (event_name && (strcmp(event_name, event->name) != 0))
5949 if (sys_name && (strcmp(sys_name, event->system) != 0))
5955 static void free_handler(struct event_handler *handle)
5957 free((void *)handle->sys_name);
5958 free((void *)handle->event_name);
5962 static int find_event_handle(struct pevent *pevent, struct event_format *event)
5964 struct event_handler *handle, **next;
5966 for (next = &pevent->handlers; *next;
5967 next = &(*next)->next) {
5969 if (event_matches(event, handle->id,
5971 handle->event_name))
5978 pr_stat("overriding event (%d) %s:%s with new print handler",
5979 event->id, event->system, event->name);
5981 event->handler = handle->func;
5982 event->context = handle->context;
5984 *next = handle->next;
5985 free_handler(handle);
5991 * __pevent_parse_format - parse the event format
5992 * @buf: the buffer storing the event format string
5993 * @size: the size of @buf
5994 * @sys: the system the event belongs to
5996 * This parses the event format and creates an event structure
5997 * to quickly parse raw data for a given event.
5999 * These files currently come from:
6001 * /sys/kernel/debug/tracing/events/.../.../format
6003 enum pevent_errno __pevent_parse_format(struct event_format **eventp,
6004 struct pevent *pevent, const char *buf,
6005 unsigned long size, const char *sys)
6007 struct event_format *event;
6010 init_input_buf(buf, size);
6012 *eventp = event = alloc_event();
6014 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6016 event->name = event_read_name();
6019 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6020 goto event_alloc_failed;
6023 if (strcmp(sys, "ftrace") == 0) {
6024 event->flags |= EVENT_FL_ISFTRACE;
6026 if (strcmp(event->name, "bprint") == 0)
6027 event->flags |= EVENT_FL_ISBPRINT;
6030 event->id = event_read_id();
6031 if (event->id < 0) {
6032 ret = PEVENT_ERRNO__READ_ID_FAILED;
6034 * This isn't an allocation error actually.
6035 * But as the ID is critical, just bail out.
6037 goto event_alloc_failed;
6040 event->system = strdup(sys);
6041 if (!event->system) {
6042 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6043 goto event_alloc_failed;
6046 /* Add pevent to event so that it can be referenced */
6047 event->pevent = pevent;
6049 ret = event_read_format(event);
6051 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
6052 goto event_parse_failed;
6056 * If the event has an override, don't print warnings if the event
6057 * print format fails to parse.
6059 if (pevent && find_event_handle(pevent, event))
6062 ret = event_read_print(event);
6066 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
6067 goto event_parse_failed;
6070 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
6071 struct format_field *field;
6072 struct print_arg *arg, **list;
6074 /* old ftrace had no args */
6075 list = &event->print_fmt.args;
6076 for (field = event->format.fields; field; field = field->next) {
6079 event->flags |= EVENT_FL_FAILED;
6080 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6082 arg->type = PRINT_FIELD;
6083 arg->field.name = strdup(field->name);
6084 if (!arg->field.name) {
6085 event->flags |= EVENT_FL_FAILED;
6087 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6089 arg->field.field = field;
6099 event->flags |= EVENT_FL_FAILED;
6103 free(event->system);
6110 static enum pevent_errno
6111 __pevent_parse_event(struct pevent *pevent,
6112 struct event_format **eventp,
6113 const char *buf, unsigned long size,
6116 int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
6117 struct event_format *event = *eventp;
6122 if (pevent && add_event(pevent, event)) {
6123 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6124 goto event_add_failed;
6127 #define PRINT_ARGS 0
6128 if (PRINT_ARGS && event->print_fmt.args)
6129 print_args(event->print_fmt.args);
6134 pevent_free_format(event);
6139 * pevent_parse_format - parse the event format
6140 * @pevent: the handle to the pevent
6141 * @eventp: returned format
6142 * @buf: the buffer storing the event format string
6143 * @size: the size of @buf
6144 * @sys: the system the event belongs to
6146 * This parses the event format and creates an event structure
6147 * to quickly parse raw data for a given event.
6149 * These files currently come from:
6151 * /sys/kernel/debug/tracing/events/.../.../format
6153 enum pevent_errno pevent_parse_format(struct pevent *pevent,
6154 struct event_format **eventp,
6156 unsigned long size, const char *sys)
6158 return __pevent_parse_event(pevent, eventp, buf, size, sys);
6162 * pevent_parse_event - parse the event format
6163 * @pevent: the handle to the pevent
6164 * @buf: the buffer storing the event format string
6165 * @size: the size of @buf
6166 * @sys: the system the event belongs to
6168 * This parses the event format and creates an event structure
6169 * to quickly parse raw data for a given event.
6171 * These files currently come from:
6173 * /sys/kernel/debug/tracing/events/.../.../format
6175 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
6176 unsigned long size, const char *sys)
6178 struct event_format *event = NULL;
6179 return __pevent_parse_event(pevent, &event, buf, size, sys);
6183 #define _PE(code, str) str
6184 static const char * const pevent_error_str[] = {
6189 int pevent_strerror(struct pevent *pevent __maybe_unused,
6190 enum pevent_errno errnum, char *buf, size_t buflen)
6196 str_error_r(errnum, buf, buflen);
6200 if (errnum <= __PEVENT_ERRNO__START ||
6201 errnum >= __PEVENT_ERRNO__END)
6204 idx = errnum - __PEVENT_ERRNO__START - 1;
6205 msg = pevent_error_str[idx];
6206 snprintf(buf, buflen, "%s", msg);
6211 int get_field_val(struct trace_seq *s, struct format_field *field,
6212 const char *name, struct pevent_record *record,
6213 unsigned long long *val, int err)
6217 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6221 if (pevent_read_number_field(field, record->data, val)) {
6223 trace_seq_printf(s, " %s=INVALID", name);
6231 * pevent_get_field_raw - return the raw pointer into the data field
6232 * @s: The seq to print to on error
6233 * @event: the event that the field is for
6234 * @name: The name of the field
6235 * @record: The record with the field name.
6236 * @len: place to store the field length.
6237 * @err: print default error if failed.
6239 * Returns a pointer into record->data of the field and places
6240 * the length of the field in @len.
6242 * On failure, it returns NULL.
6244 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
6245 const char *name, struct pevent_record *record,
6248 struct format_field *field;
6249 void *data = record->data;
6256 field = pevent_find_field(event, name);
6260 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6264 /* Allow @len to be NULL */
6268 offset = field->offset;
6269 if (field->flags & FIELD_IS_DYNAMIC) {
6270 offset = pevent_read_number(event->pevent,
6271 data + offset, field->size);
6272 *len = offset >> 16;
6277 return data + offset;
6281 * pevent_get_field_val - find a field and return its value
6282 * @s: The seq to print to on error
6283 * @event: the event that the field is for
6284 * @name: The name of the field
6285 * @record: The record with the field name.
6286 * @val: place to store the value of the field.
6287 * @err: print default error if failed.
6289 * Returns 0 on success -1 on field not found.
6291 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
6292 const char *name, struct pevent_record *record,
6293 unsigned long long *val, int err)
6295 struct format_field *field;
6300 field = pevent_find_field(event, name);
6302 return get_field_val(s, field, name, record, val, err);
6306 * pevent_get_common_field_val - find a common field and return its value
6307 * @s: The seq to print to on error
6308 * @event: the event that the field is for
6309 * @name: The name of the field
6310 * @record: The record with the field name.
6311 * @val: place to store the value of the field.
6312 * @err: print default error if failed.
6314 * Returns 0 on success -1 on field not found.
6316 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
6317 const char *name, struct pevent_record *record,
6318 unsigned long long *val, int err)
6320 struct format_field *field;
6325 field = pevent_find_common_field(event, name);
6327 return get_field_val(s, field, name, record, val, err);
6331 * pevent_get_any_field_val - find a any field and return its value
6332 * @s: The seq to print to on error
6333 * @event: the event that the field is for
6334 * @name: The name of the field
6335 * @record: The record with the field name.
6336 * @val: place to store the value of the field.
6337 * @err: print default error if failed.
6339 * Returns 0 on success -1 on field not found.
6341 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
6342 const char *name, struct pevent_record *record,
6343 unsigned long long *val, int err)
6345 struct format_field *field;
6350 field = pevent_find_any_field(event, name);
6352 return get_field_val(s, field, name, record, val, err);
6356 * pevent_print_num_field - print a field and a format
6357 * @s: The seq to print to
6358 * @fmt: The printf format to print the field with.
6359 * @event: the event that the field is for
6360 * @name: The name of the field
6361 * @record: The record with the field name.
6362 * @err: print default error if failed.
6364 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6366 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
6367 struct event_format *event, const char *name,
6368 struct pevent_record *record, int err)
6370 struct format_field *field = pevent_find_field(event, name);
6371 unsigned long long val;
6376 if (pevent_read_number_field(field, record->data, &val))
6379 return trace_seq_printf(s, fmt, val);
6383 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6388 * pevent_print_func_field - print a field and a format for function pointers
6389 * @s: The seq to print to
6390 * @fmt: The printf format to print the field with.
6391 * @event: the event that the field is for
6392 * @name: The name of the field
6393 * @record: The record with the field name.
6394 * @err: print default error if failed.
6396 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6398 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
6399 struct event_format *event, const char *name,
6400 struct pevent_record *record, int err)
6402 struct format_field *field = pevent_find_field(event, name);
6403 struct pevent *pevent = event->pevent;
6404 unsigned long long val;
6405 struct func_map *func;
6411 if (pevent_read_number_field(field, record->data, &val))
6414 func = find_func(pevent, val);
6417 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6419 sprintf(tmp, "0x%08llx", val);
6421 return trace_seq_printf(s, fmt, tmp);
6425 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6429 static void free_func_handle(struct pevent_function_handler *func)
6431 struct pevent_func_params *params;
6435 while (func->params) {
6436 params = func->params;
6437 func->params = params->next;
6445 * pevent_register_print_function - register a helper function
6446 * @pevent: the handle to the pevent
6447 * @func: the function to process the helper function
6448 * @ret_type: the return type of the helper function
6449 * @name: the name of the helper function
6450 * @parameters: A list of enum pevent_func_arg_type
6452 * Some events may have helper functions in the print format arguments.
6453 * This allows a plugin to dynamically create a way to process one
6454 * of these functions.
6456 * The @parameters is a variable list of pevent_func_arg_type enums that
6457 * must end with PEVENT_FUNC_ARG_VOID.
6459 int pevent_register_print_function(struct pevent *pevent,
6460 pevent_func_handler func,
6461 enum pevent_func_arg_type ret_type,
6464 struct pevent_function_handler *func_handle;
6465 struct pevent_func_params **next_param;
6466 struct pevent_func_params *param;
6467 enum pevent_func_arg_type type;
6471 func_handle = find_func_handler(pevent, name);
6474 * This is most like caused by the users own
6475 * plugins updating the function. This overrides the
6478 pr_stat("override of function helper '%s'", name);
6479 remove_func_handler(pevent, name);
6482 func_handle = calloc(1, sizeof(*func_handle));
6484 do_warning("Failed to allocate function handler");
6485 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6488 func_handle->ret_type = ret_type;
6489 func_handle->name = strdup(name);
6490 func_handle->func = func;
6491 if (!func_handle->name) {
6492 do_warning("Failed to allocate function name");
6494 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6497 next_param = &(func_handle->params);
6500 type = va_arg(ap, enum pevent_func_arg_type);
6501 if (type == PEVENT_FUNC_ARG_VOID)
6504 if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
6505 do_warning("Invalid argument type %d", type);
6506 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
6510 param = malloc(sizeof(*param));
6512 do_warning("Failed to allocate function param");
6513 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6519 *next_param = param;
6520 next_param = &(param->next);
6522 func_handle->nr_args++;
6526 func_handle->next = pevent->func_handlers;
6527 pevent->func_handlers = func_handle;
6532 free_func_handle(func_handle);
6537 * pevent_unregister_print_function - unregister a helper function
6538 * @pevent: the handle to the pevent
6539 * @func: the function to process the helper function
6540 * @name: the name of the helper function
6542 * This function removes existing print handler for function @name.
6544 * Returns 0 if the handler was removed successully, -1 otherwise.
6546 int pevent_unregister_print_function(struct pevent *pevent,
6547 pevent_func_handler func, char *name)
6549 struct pevent_function_handler *func_handle;
6551 func_handle = find_func_handler(pevent, name);
6552 if (func_handle && func_handle->func == func) {
6553 remove_func_handler(pevent, name);
6559 static struct event_format *pevent_search_event(struct pevent *pevent, int id,
6560 const char *sys_name,
6561 const char *event_name)
6563 struct event_format *event;
6567 event = pevent_find_event(pevent, id);
6570 if (event_name && (strcmp(event_name, event->name) != 0))
6572 if (sys_name && (strcmp(sys_name, event->system) != 0))
6575 event = pevent_find_event_by_name(pevent, sys_name, event_name);
6583 * pevent_register_event_handler - register a way to parse an event
6584 * @pevent: the handle to the pevent
6585 * @id: the id of the event to register
6586 * @sys_name: the system name the event belongs to
6587 * @event_name: the name of the event
6588 * @func: the function to call to parse the event information
6589 * @context: the data to be passed to @func
6591 * This function allows a developer to override the parsing of
6592 * a given event. If for some reason the default print format
6593 * is not sufficient, this function will register a function
6594 * for an event to be used to parse the data instead.
6596 * If @id is >= 0, then it is used to find the event.
6597 * else @sys_name and @event_name are used.
6599 int pevent_register_event_handler(struct pevent *pevent, int id,
6600 const char *sys_name, const char *event_name,
6601 pevent_event_handler_func func, void *context)
6603 struct event_format *event;
6604 struct event_handler *handle;
6606 event = pevent_search_event(pevent, id, sys_name, event_name);
6610 pr_stat("overriding event (%d) %s:%s with new print handler",
6611 event->id, event->system, event->name);
6613 event->handler = func;
6614 event->context = context;
6618 /* Save for later use. */
6619 handle = calloc(1, sizeof(*handle));
6621 do_warning("Failed to allocate event handler");
6622 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6627 handle->event_name = strdup(event_name);
6629 handle->sys_name = strdup(sys_name);
6631 if ((event_name && !handle->event_name) ||
6632 (sys_name && !handle->sys_name)) {
6633 do_warning("Failed to allocate event/sys name");
6634 free((void *)handle->event_name);
6635 free((void *)handle->sys_name);
6637 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6640 handle->func = func;
6641 handle->next = pevent->handlers;
6642 pevent->handlers = handle;
6643 handle->context = context;
6648 static int handle_matches(struct event_handler *handler, int id,
6649 const char *sys_name, const char *event_name,
6650 pevent_event_handler_func func, void *context)
6652 if (id >= 0 && id != handler->id)
6655 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6658 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6661 if (func != handler->func || context != handler->context)
6668 * pevent_unregister_event_handler - unregister an existing event handler
6669 * @pevent: the handle to the pevent
6670 * @id: the id of the event to unregister
6671 * @sys_name: the system name the handler belongs to
6672 * @event_name: the name of the event handler
6673 * @func: the function to call to parse the event information
6674 * @context: the data to be passed to @func
6676 * This function removes existing event handler (parser).
6678 * If @id is >= 0, then it is used to find the event.
6679 * else @sys_name and @event_name are used.
6681 * Returns 0 if handler was removed successfully, -1 if event was not found.
6683 int pevent_unregister_event_handler(struct pevent *pevent, int id,
6684 const char *sys_name, const char *event_name,
6685 pevent_event_handler_func func, void *context)
6687 struct event_format *event;
6688 struct event_handler *handle;
6689 struct event_handler **next;
6691 event = pevent_search_event(pevent, id, sys_name, event_name);
6695 if (event->handler == func && event->context == context) {
6696 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6697 event->id, event->system, event->name);
6699 event->handler = NULL;
6700 event->context = NULL;
6705 for (next = &pevent->handlers; *next; next = &(*next)->next) {
6707 if (handle_matches(handle, id, sys_name, event_name,
6715 *next = handle->next;
6716 free_handler(handle);
6722 * pevent_alloc - create a pevent handle
6724 struct pevent *pevent_alloc(void)
6726 struct pevent *pevent = calloc(1, sizeof(*pevent));
6729 pevent->ref_count = 1;
6734 void pevent_ref(struct pevent *pevent)
6736 pevent->ref_count++;
6739 void pevent_free_format_field(struct format_field *field)
6742 if (field->alias != field->name)
6748 static void free_format_fields(struct format_field *field)
6750 struct format_field *next;
6754 pevent_free_format_field(field);
6759 static void free_formats(struct format *format)
6761 free_format_fields(format->common_fields);
6762 free_format_fields(format->fields);
6765 void pevent_free_format(struct event_format *event)
6768 free(event->system);
6770 free_formats(&event->format);
6772 free(event->print_fmt.format);
6773 free_args(event->print_fmt.args);
6779 * pevent_free - free a pevent handle
6780 * @pevent: the pevent handle to free
6782 void pevent_free(struct pevent *pevent)
6784 struct cmdline_list *cmdlist, *cmdnext;
6785 struct func_list *funclist, *funcnext;
6786 struct printk_list *printklist, *printknext;
6787 struct pevent_function_handler *func_handler;
6788 struct event_handler *handle;
6794 cmdlist = pevent->cmdlist;
6795 funclist = pevent->funclist;
6796 printklist = pevent->printklist;
6798 pevent->ref_count--;
6799 if (pevent->ref_count)
6802 if (pevent->cmdlines) {
6803 for (i = 0; i < pevent->cmdline_count; i++)
6804 free(pevent->cmdlines[i].comm);
6805 free(pevent->cmdlines);
6809 cmdnext = cmdlist->next;
6810 free(cmdlist->comm);
6815 if (pevent->func_map) {
6816 for (i = 0; i < (int)pevent->func_count; i++) {
6817 free(pevent->func_map[i].func);
6818 free(pevent->func_map[i].mod);
6820 free(pevent->func_map);
6824 funcnext = funclist->next;
6825 free(funclist->func);
6826 free(funclist->mod);
6828 funclist = funcnext;
6831 while (pevent->func_handlers) {
6832 func_handler = pevent->func_handlers;
6833 pevent->func_handlers = func_handler->next;
6834 free_func_handle(func_handler);
6837 if (pevent->printk_map) {
6838 for (i = 0; i < (int)pevent->printk_count; i++)
6839 free(pevent->printk_map[i].printk);
6840 free(pevent->printk_map);
6843 while (printklist) {
6844 printknext = printklist->next;
6845 free(printklist->printk);
6847 printklist = printknext;
6850 for (i = 0; i < pevent->nr_events; i++)
6851 pevent_free_format(pevent->events[i]);
6853 while (pevent->handlers) {
6854 handle = pevent->handlers;
6855 pevent->handlers = handle->next;
6856 free_handler(handle);
6859 free(pevent->trace_clock);
6860 free(pevent->events);
6861 free(pevent->sort_events);
6862 free(pevent->func_resolver);
6867 void pevent_unref(struct pevent *pevent)
6869 pevent_free(pevent);