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));
271 pevent->cmdlines = cmdlines;
273 cmdlines[pevent->cmdline_count].comm = strdup(comm);
274 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);
290 * pevent_register_comm - register a pid / comm mapping
291 * @pevent: handle for the pevent
292 * @comm: the command line to register
293 * @pid: the pid to map the command line to
295 * This adds a mapping to search for command line names with
296 * a given pid. The comm is duplicated.
298 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
300 struct cmdline_list *item;
302 if (pevent->cmdlines)
303 return add_new_comm(pevent, comm, pid);
305 item = malloc(sizeof(*item));
310 item->comm = strdup(comm);
312 item->comm = strdup("<...>");
318 item->next = pevent->cmdlist;
320 pevent->cmdlist = item;
321 pevent->cmdline_count++;
326 int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock)
328 pevent->trace_clock = strdup(trace_clock);
329 if (!pevent->trace_clock) {
337 unsigned long long addr;
343 struct func_list *next;
344 unsigned long long addr;
349 static int func_cmp(const void *a, const void *b)
351 const struct func_map *fa = a;
352 const struct func_map *fb = b;
354 if (fa->addr < fb->addr)
356 if (fa->addr > fb->addr)
363 * We are searching for a record in between, not an exact
366 static int func_bcmp(const void *a, const void *b)
368 const struct func_map *fa = a;
369 const struct func_map *fb = b;
371 if ((fa->addr == fb->addr) ||
373 (fa->addr > fb->addr &&
374 fa->addr < (fb+1)->addr))
377 if (fa->addr < fb->addr)
383 static int func_map_init(struct pevent *pevent)
385 struct func_list *funclist;
386 struct func_list *item;
387 struct func_map *func_map;
390 func_map = malloc(sizeof(*func_map) * (pevent->func_count + 1));
394 funclist = pevent->funclist;
398 func_map[i].func = funclist->func;
399 func_map[i].addr = funclist->addr;
400 func_map[i].mod = funclist->mod;
403 funclist = funclist->next;
407 qsort(func_map, pevent->func_count, sizeof(*func_map), func_cmp);
410 * Add a special record at the end.
412 func_map[pevent->func_count].func = NULL;
413 func_map[pevent->func_count].addr = 0;
414 func_map[pevent->func_count].mod = NULL;
416 pevent->func_map = func_map;
417 pevent->funclist = NULL;
422 static struct func_map *
423 __find_func(struct pevent *pevent, unsigned long long addr)
425 struct func_map *func;
428 if (!pevent->func_map)
429 func_map_init(pevent);
433 func = bsearch(&key, pevent->func_map, pevent->func_count,
434 sizeof(*pevent->func_map), func_bcmp);
439 struct func_resolver {
440 pevent_func_resolver_t *func;
446 * pevent_set_function_resolver - set an alternative function resolver
447 * @pevent: handle for the pevent
448 * @resolver: function to be used
449 * @priv: resolver function private state.
451 * Some tools may have already a way to resolve kernel functions, allow them to
452 * keep using it instead of duplicating all the entries inside
455 int pevent_set_function_resolver(struct pevent *pevent,
456 pevent_func_resolver_t *func, void *priv)
458 struct func_resolver *resolver = malloc(sizeof(*resolver));
460 if (resolver == NULL)
463 resolver->func = func;
464 resolver->priv = priv;
466 free(pevent->func_resolver);
467 pevent->func_resolver = resolver;
473 * pevent_reset_function_resolver - reset alternative function resolver
474 * @pevent: handle for the pevent
476 * Stop using whatever alternative resolver was set, use the default
479 void pevent_reset_function_resolver(struct pevent *pevent)
481 free(pevent->func_resolver);
482 pevent->func_resolver = NULL;
485 static struct func_map *
486 find_func(struct pevent *pevent, unsigned long long addr)
488 struct func_map *map;
490 if (!pevent->func_resolver)
491 return __find_func(pevent, addr);
493 map = &pevent->func_resolver->map;
496 map->func = pevent->func_resolver->func(pevent->func_resolver->priv,
497 &map->addr, &map->mod);
498 if (map->func == NULL)
505 * pevent_find_function - find a function by a given address
506 * @pevent: handle for the pevent
507 * @addr: the address to find the function with
509 * Returns a pointer to the function stored that has the given
510 * address. Note, the address does not have to be exact, it
511 * will select the function that would contain the address.
513 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr)
515 struct func_map *map;
517 map = find_func(pevent, addr);
525 * pevent_find_function_address - find a function address by a given address
526 * @pevent: handle for the pevent
527 * @addr: the address to find the function with
529 * Returns the address the function starts at. This can be used in
530 * conjunction with pevent_find_function to print both the function
531 * name and the function offset.
534 pevent_find_function_address(struct pevent *pevent, unsigned long long addr)
536 struct func_map *map;
538 map = find_func(pevent, addr);
546 * pevent_register_function - register a function with a given address
547 * @pevent: handle for the pevent
548 * @function: the function name to register
549 * @addr: the address the function starts at
550 * @mod: the kernel module the function may be in (NULL for none)
552 * This registers a function name with an address and module.
553 * The @func passed in is duplicated.
555 int pevent_register_function(struct pevent *pevent, char *func,
556 unsigned long long addr, char *mod)
558 struct func_list *item = malloc(sizeof(*item));
563 item->next = pevent->funclist;
564 item->func = strdup(func);
569 item->mod = strdup(mod);
576 pevent->funclist = item;
577 pevent->func_count++;
591 * pevent_print_funcs - print out the stored functions
592 * @pevent: handle for the pevent
594 * This prints out the stored functions.
596 void pevent_print_funcs(struct pevent *pevent)
600 if (!pevent->func_map)
601 func_map_init(pevent);
603 for (i = 0; i < (int)pevent->func_count; i++) {
605 pevent->func_map[i].addr,
606 pevent->func_map[i].func);
607 if (pevent->func_map[i].mod)
608 printf(" [%s]\n", pevent->func_map[i].mod);
615 unsigned long long addr;
620 struct printk_list *next;
621 unsigned long long addr;
625 static int printk_cmp(const void *a, const void *b)
627 const struct printk_map *pa = a;
628 const struct printk_map *pb = b;
630 if (pa->addr < pb->addr)
632 if (pa->addr > pb->addr)
638 static int printk_map_init(struct pevent *pevent)
640 struct printk_list *printklist;
641 struct printk_list *item;
642 struct printk_map *printk_map;
645 printk_map = malloc(sizeof(*printk_map) * (pevent->printk_count + 1));
649 printklist = pevent->printklist;
653 printk_map[i].printk = printklist->printk;
654 printk_map[i].addr = printklist->addr;
657 printklist = printklist->next;
661 qsort(printk_map, pevent->printk_count, sizeof(*printk_map), printk_cmp);
663 pevent->printk_map = printk_map;
664 pevent->printklist = NULL;
669 static struct printk_map *
670 find_printk(struct pevent *pevent, unsigned long long addr)
672 struct printk_map *printk;
673 struct printk_map key;
675 if (!pevent->printk_map && printk_map_init(pevent))
680 printk = bsearch(&key, pevent->printk_map, pevent->printk_count,
681 sizeof(*pevent->printk_map), printk_cmp);
687 * pevent_register_print_string - register a string by its address
688 * @pevent: handle for the pevent
689 * @fmt: the string format to register
690 * @addr: the address the string was located at
692 * This registers a string by the address it was stored in the kernel.
693 * The @fmt passed in is duplicated.
695 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
696 unsigned long long addr)
698 struct printk_list *item = malloc(sizeof(*item));
704 item->next = pevent->printklist;
707 /* Strip off quotes and '\n' from the end */
710 item->printk = strdup(fmt);
714 p = item->printk + strlen(item->printk) - 1;
719 if (strcmp(p, "\\n") == 0)
722 pevent->printklist = item;
723 pevent->printk_count++;
734 * pevent_print_printk - print out the stored strings
735 * @pevent: handle for the pevent
737 * This prints the string formats that were stored.
739 void pevent_print_printk(struct pevent *pevent)
743 if (!pevent->printk_map)
744 printk_map_init(pevent);
746 for (i = 0; i < (int)pevent->printk_count; i++) {
747 printf("%016llx %s\n",
748 pevent->printk_map[i].addr,
749 pevent->printk_map[i].printk);
753 static struct event_format *alloc_event(void)
755 return calloc(1, sizeof(struct event_format));
758 static int add_event(struct pevent *pevent, struct event_format *event)
761 struct event_format **events = realloc(pevent->events, sizeof(event) *
762 (pevent->nr_events + 1));
766 pevent->events = events;
768 for (i = 0; i < pevent->nr_events; i++) {
769 if (pevent->events[i]->id > event->id)
772 if (i < pevent->nr_events)
773 memmove(&pevent->events[i + 1],
775 sizeof(event) * (pevent->nr_events - i));
777 pevent->events[i] = event;
780 event->pevent = pevent;
785 static int event_item_type(enum event_type type)
788 case EVENT_ITEM ... EVENT_SQUOTE:
790 case EVENT_ERROR ... EVENT_DELIM:
796 static void free_flag_sym(struct print_flag_sym *fsym)
798 struct print_flag_sym *next;
809 static void free_arg(struct print_arg *arg)
811 struct print_arg *farg;
818 free(arg->atom.atom);
821 free(arg->field.name);
824 free_arg(arg->flags.field);
825 free(arg->flags.delim);
826 free_flag_sym(arg->flags.flags);
829 free_arg(arg->symbol.field);
830 free_flag_sym(arg->symbol.symbols);
834 free_arg(arg->hex.field);
835 free_arg(arg->hex.size);
837 case PRINT_INT_ARRAY:
838 free_arg(arg->int_array.field);
839 free_arg(arg->int_array.count);
840 free_arg(arg->int_array.el_size);
843 free(arg->typecast.type);
844 free_arg(arg->typecast.item);
848 free(arg->string.string);
851 free(arg->bitmask.bitmask);
853 case PRINT_DYNAMIC_ARRAY:
854 case PRINT_DYNAMIC_ARRAY_LEN:
855 free(arg->dynarray.index);
859 free_arg(arg->op.left);
860 free_arg(arg->op.right);
863 while (arg->func.args) {
864 farg = arg->func.args;
865 arg->func.args = farg->next;
878 static enum event_type get_type(int ch)
881 return EVENT_NEWLINE;
884 if (isalnum(ch) || ch == '_')
892 if (ch == '(' || ch == ')' || ch == ',')
898 static int __read_char(void)
900 if (input_buf_ptr >= input_buf_siz)
903 return input_buf[input_buf_ptr++];
906 static int __peek_char(void)
908 if (input_buf_ptr >= input_buf_siz)
911 return input_buf[input_buf_ptr];
915 * pevent_peek_char - peek at the next character that will be read
917 * Returns the next character read, or -1 if end of buffer.
919 int pevent_peek_char(void)
921 return __peek_char();
924 static int extend_token(char **tok, char *buf, int size)
926 char *newtok = realloc(*tok, size);
943 static enum event_type force_token(const char *str, char **tok);
945 static enum event_type __read_token(char **tok)
948 int ch, last_ch, quote_ch, next_ch;
951 enum event_type type;
961 if (type == EVENT_NONE)
969 if (asprintf(tok, "%c", ch) < 0)
977 next_ch = __peek_char();
978 if (next_ch == '>') {
979 buf[i++] = __read_char();
992 buf[i++] = __read_char();
1004 default: /* what should we do instead? */
1014 buf[i++] = __read_char();
1019 /* don't keep quotes */
1025 if (i == (BUFSIZ - 1)) {
1029 if (extend_token(tok, buf, tok_size) < 0)
1036 /* the '\' '\' will cancel itself */
1037 if (ch == '\\' && last_ch == '\\')
1039 } while (ch != quote_ch || last_ch == '\\');
1040 /* remove the last quote */
1044 * For strings (double quotes) check the next token.
1045 * If it is another string, concatinate the two.
1047 if (type == EVENT_DQUOTE) {
1048 unsigned long long save_input_buf_ptr = input_buf_ptr;
1052 } while (isspace(ch));
1055 input_buf_ptr = save_input_buf_ptr;
1060 case EVENT_ERROR ... EVENT_SPACE:
1066 while (get_type(__peek_char()) == type) {
1067 if (i == (BUFSIZ - 1)) {
1071 if (extend_token(tok, buf, tok_size) < 0)
1081 if (extend_token(tok, buf, tok_size + i + 1) < 0)
1084 if (type == EVENT_ITEM) {
1086 * Older versions of the kernel has a bug that
1087 * creates invalid symbols and will break the mac80211
1088 * parsing. This is a work around to that bug.
1090 * See Linux kernel commit:
1091 * 811cb50baf63461ce0bdb234927046131fc7fa8b
1093 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
1096 return force_token("\"\%s\" ", tok);
1097 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
1100 return force_token("\" sta:%pM\" ", tok);
1101 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
1104 return force_token("\" vif:%p(%d)\" ", tok);
1111 static enum event_type force_token(const char *str, char **tok)
1113 const char *save_input_buf;
1114 unsigned long long save_input_buf_ptr;
1115 unsigned long long save_input_buf_siz;
1116 enum event_type type;
1118 /* save off the current input pointers */
1119 save_input_buf = input_buf;
1120 save_input_buf_ptr = input_buf_ptr;
1121 save_input_buf_siz = input_buf_siz;
1123 init_input_buf(str, strlen(str));
1125 type = __read_token(tok);
1127 /* reset back to original token */
1128 input_buf = save_input_buf;
1129 input_buf_ptr = save_input_buf_ptr;
1130 input_buf_siz = save_input_buf_siz;
1135 static void free_token(char *tok)
1141 static enum event_type read_token(char **tok)
1143 enum event_type type;
1146 type = __read_token(tok);
1147 if (type != EVENT_SPACE)
1159 * pevent_read_token - access to utilites to use the pevent parser
1160 * @tok: The token to return
1162 * This will parse tokens from the string given by
1163 * pevent_init_data().
1165 * Returns the token type.
1167 enum event_type pevent_read_token(char **tok)
1169 return read_token(tok);
1173 * pevent_free_token - free a token returned by pevent_read_token
1174 * @token: the token to free
1176 void pevent_free_token(char *token)
1182 static enum event_type read_token_item(char **tok)
1184 enum event_type type;
1187 type = __read_token(tok);
1188 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
1199 static int test_type(enum event_type type, enum event_type expect)
1201 if (type != expect) {
1202 do_warning("Error: expected type %d but read %d",
1209 static int test_type_token(enum event_type type, const char *token,
1210 enum event_type expect, const char *expect_tok)
1212 if (type != expect) {
1213 do_warning("Error: expected type %d but read %d",
1218 if (strcmp(token, expect_tok) != 0) {
1219 do_warning("Error: expected '%s' but read '%s'",
1226 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
1228 enum event_type type;
1231 type = read_token(tok);
1233 type = read_token_item(tok);
1234 return test_type(type, expect);
1237 static int read_expect_type(enum event_type expect, char **tok)
1239 return __read_expect_type(expect, tok, 1);
1242 static int __read_expected(enum event_type expect, const char *str,
1245 enum event_type type;
1250 type = read_token(&token);
1252 type = read_token_item(&token);
1254 ret = test_type_token(type, token, expect, str);
1261 static int read_expected(enum event_type expect, const char *str)
1263 return __read_expected(expect, str, 1);
1266 static int read_expected_item(enum event_type expect, const char *str)
1268 return __read_expected(expect, str, 0);
1271 static char *event_read_name(void)
1275 if (read_expected(EVENT_ITEM, "name") < 0)
1278 if (read_expected(EVENT_OP, ":") < 0)
1281 if (read_expect_type(EVENT_ITEM, &token) < 0)
1291 static int event_read_id(void)
1296 if (read_expected_item(EVENT_ITEM, "ID") < 0)
1299 if (read_expected(EVENT_OP, ":") < 0)
1302 if (read_expect_type(EVENT_ITEM, &token) < 0)
1305 id = strtoul(token, NULL, 0);
1314 static int field_is_string(struct format_field *field)
1316 if ((field->flags & FIELD_IS_ARRAY) &&
1317 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1318 strstr(field->type, "s8")))
1324 static int field_is_dynamic(struct format_field *field)
1326 if (strncmp(field->type, "__data_loc", 10) == 0)
1332 static int field_is_long(struct format_field *field)
1334 /* includes long long */
1335 if (strstr(field->type, "long"))
1341 static unsigned int type_size(const char *name)
1343 /* This covers all FIELD_IS_STRING types. */
1361 for (i = 0; table[i].type; i++) {
1362 if (!strcmp(table[i].type, name))
1363 return table[i].size;
1369 static int event_read_fields(struct event_format *event, struct format_field **fields)
1371 struct format_field *field = NULL;
1372 enum event_type type;
1378 unsigned int size_dynamic = 0;
1380 type = read_token(&token);
1381 if (type == EVENT_NEWLINE) {
1388 if (test_type_token(type, token, EVENT_ITEM, "field"))
1392 type = read_token(&token);
1394 * The ftrace fields may still use the "special" name.
1397 if (event->flags & EVENT_FL_ISFTRACE &&
1398 type == EVENT_ITEM && strcmp(token, "special") == 0) {
1400 type = read_token(&token);
1403 if (test_type_token(type, token, EVENT_OP, ":") < 0)
1407 if (read_expect_type(EVENT_ITEM, &token) < 0)
1412 field = calloc(1, sizeof(*field));
1416 field->event = event;
1418 /* read the rest of the type */
1420 type = read_token(&token);
1421 if (type == EVENT_ITEM ||
1422 (type == EVENT_OP && strcmp(token, "*") == 0) ||
1424 * Some of the ftrace fields are broken and have
1425 * an illegal "." in them.
1427 (event->flags & EVENT_FL_ISFTRACE &&
1428 type == EVENT_OP && strcmp(token, ".") == 0)) {
1430 if (strcmp(token, "*") == 0)
1431 field->flags |= FIELD_IS_POINTER;
1435 new_type = realloc(field->type,
1436 strlen(field->type) +
1437 strlen(last_token) + 2);
1442 field->type = new_type;
1443 strcat(field->type, " ");
1444 strcat(field->type, last_token);
1447 field->type = last_token;
1456 do_warning_event(event, "%s: no type found", __func__);
1459 field->name = field->alias = last_token;
1461 if (test_type(type, EVENT_OP))
1464 if (strcmp(token, "[") == 0) {
1465 enum event_type last_type = type;
1466 char *brackets = token;
1470 field->flags |= FIELD_IS_ARRAY;
1472 type = read_token(&token);
1474 if (type == EVENT_ITEM)
1475 field->arraylen = strtoul(token, NULL, 0);
1477 field->arraylen = 0;
1479 while (strcmp(token, "]") != 0) {
1480 if (last_type == EVENT_ITEM &&
1487 new_brackets = realloc(brackets,
1489 strlen(token) + len);
1490 if (!new_brackets) {
1494 brackets = new_brackets;
1496 strcat(brackets, " ");
1497 strcat(brackets, token);
1498 /* We only care about the last token */
1499 field->arraylen = strtoul(token, NULL, 0);
1501 type = read_token(&token);
1502 if (type == EVENT_NONE) {
1503 do_warning_event(event, "failed to find token");
1510 new_brackets = realloc(brackets, strlen(brackets) + 2);
1511 if (!new_brackets) {
1515 brackets = new_brackets;
1516 strcat(brackets, "]");
1518 /* add brackets to type */
1520 type = read_token(&token);
1522 * If the next token is not an OP, then it is of
1523 * the format: type [] item;
1525 if (type == EVENT_ITEM) {
1527 new_type = realloc(field->type,
1528 strlen(field->type) +
1529 strlen(field->name) +
1530 strlen(brackets) + 2);
1535 field->type = new_type;
1536 strcat(field->type, " ");
1537 strcat(field->type, field->name);
1538 size_dynamic = type_size(field->name);
1539 free_token(field->name);
1540 strcat(field->type, brackets);
1541 field->name = field->alias = token;
1542 type = read_token(&token);
1545 new_type = realloc(field->type,
1546 strlen(field->type) +
1547 strlen(brackets) + 1);
1552 field->type = new_type;
1553 strcat(field->type, brackets);
1558 if (field_is_string(field))
1559 field->flags |= FIELD_IS_STRING;
1560 if (field_is_dynamic(field))
1561 field->flags |= FIELD_IS_DYNAMIC;
1562 if (field_is_long(field))
1563 field->flags |= FIELD_IS_LONG;
1565 if (test_type_token(type, token, EVENT_OP, ";"))
1569 if (read_expected(EVENT_ITEM, "offset") < 0)
1572 if (read_expected(EVENT_OP, ":") < 0)
1575 if (read_expect_type(EVENT_ITEM, &token))
1577 field->offset = strtoul(token, NULL, 0);
1580 if (read_expected(EVENT_OP, ";") < 0)
1583 if (read_expected(EVENT_ITEM, "size") < 0)
1586 if (read_expected(EVENT_OP, ":") < 0)
1589 if (read_expect_type(EVENT_ITEM, &token))
1591 field->size = strtoul(token, NULL, 0);
1594 if (read_expected(EVENT_OP, ";") < 0)
1597 type = read_token(&token);
1598 if (type != EVENT_NEWLINE) {
1599 /* newer versions of the kernel have a "signed" type */
1600 if (test_type_token(type, token, EVENT_ITEM, "signed"))
1605 if (read_expected(EVENT_OP, ":") < 0)
1608 if (read_expect_type(EVENT_ITEM, &token))
1611 if (strtoul(token, NULL, 0))
1612 field->flags |= FIELD_IS_SIGNED;
1615 if (read_expected(EVENT_OP, ";") < 0)
1618 if (read_expect_type(EVENT_NEWLINE, &token))
1624 if (field->flags & FIELD_IS_ARRAY) {
1625 if (field->arraylen)
1626 field->elementsize = field->size / field->arraylen;
1627 else if (field->flags & FIELD_IS_DYNAMIC)
1628 field->elementsize = size_dynamic;
1629 else if (field->flags & FIELD_IS_STRING)
1630 field->elementsize = 1;
1631 else if (field->flags & FIELD_IS_LONG)
1632 field->elementsize = event->pevent ?
1633 event->pevent->long_size :
1636 field->elementsize = field->size;
1639 fields = &field->next;
1656 static int event_read_format(struct event_format *event)
1661 if (read_expected_item(EVENT_ITEM, "format") < 0)
1664 if (read_expected(EVENT_OP, ":") < 0)
1667 if (read_expect_type(EVENT_NEWLINE, &token))
1671 ret = event_read_fields(event, &event->format.common_fields);
1674 event->format.nr_common = ret;
1676 ret = event_read_fields(event, &event->format.fields);
1679 event->format.nr_fields = ret;
1688 static enum event_type
1689 process_arg_token(struct event_format *event, struct print_arg *arg,
1690 char **tok, enum event_type type);
1692 static enum event_type
1693 process_arg(struct event_format *event, struct print_arg *arg, char **tok)
1695 enum event_type type;
1698 type = read_token(&token);
1701 return process_arg_token(event, arg, tok, type);
1704 static enum event_type
1705 process_op(struct event_format *event, struct print_arg *arg, char **tok);
1708 * For __print_symbolic() and __print_flags, we need to completely
1709 * evaluate the first argument, which defines what to print next.
1711 static enum event_type
1712 process_field_arg(struct event_format *event, struct print_arg *arg, char **tok)
1714 enum event_type type;
1716 type = process_arg(event, arg, tok);
1718 while (type == EVENT_OP) {
1719 type = process_op(event, arg, tok);
1725 static enum event_type
1726 process_cond(struct event_format *event, struct print_arg *top, char **tok)
1728 struct print_arg *arg, *left, *right;
1729 enum event_type type;
1734 right = alloc_arg();
1736 if (!arg || !left || !right) {
1737 do_warning_event(event, "%s: not enough memory!", __func__);
1738 /* arg will be freed at out_free */
1744 arg->type = PRINT_OP;
1745 arg->op.left = left;
1746 arg->op.right = right;
1749 type = process_arg(event, left, &token);
1752 if (type == EVENT_ERROR)
1755 /* Handle other operations in the arguments */
1756 if (type == EVENT_OP && strcmp(token, ":") != 0) {
1757 type = process_op(event, left, &token);
1761 if (test_type_token(type, token, EVENT_OP, ":"))
1766 type = process_arg(event, right, &token);
1768 top->op.right = arg;
1774 /* Top may point to itself */
1775 top->op.right = NULL;
1781 static enum event_type
1782 process_array(struct event_format *event, struct print_arg *top, char **tok)
1784 struct print_arg *arg;
1785 enum event_type type;
1790 do_warning_event(event, "%s: not enough memory!", __func__);
1791 /* '*tok' is set to top->op.op. No need to free. */
1797 type = process_arg(event, arg, &token);
1798 if (test_type_token(type, token, EVENT_OP, "]"))
1801 top->op.right = arg;
1804 type = read_token_item(&token);
1815 static int get_op_prio(char *op)
1829 /* '>>' and '<<' are 8 */
1833 /* '==' and '!=' are 10 */
1843 do_warning("unknown op '%c'", op[0]);
1847 if (strcmp(op, "++") == 0 ||
1848 strcmp(op, "--") == 0) {
1850 } else if (strcmp(op, ">>") == 0 ||
1851 strcmp(op, "<<") == 0) {
1853 } else if (strcmp(op, ">=") == 0 ||
1854 strcmp(op, "<=") == 0) {
1856 } else if (strcmp(op, "==") == 0 ||
1857 strcmp(op, "!=") == 0) {
1859 } else if (strcmp(op, "&&") == 0) {
1861 } else if (strcmp(op, "||") == 0) {
1864 do_warning("unknown op '%s'", op);
1870 static int set_op_prio(struct print_arg *arg)
1873 /* single ops are the greatest */
1874 if (!arg->op.left || arg->op.left->type == PRINT_NULL)
1877 arg->op.prio = get_op_prio(arg->op.op);
1879 return arg->op.prio;
1882 /* Note, *tok does not get freed, but will most likely be saved */
1883 static enum event_type
1884 process_op(struct event_format *event, struct print_arg *arg, char **tok)
1886 struct print_arg *left, *right = NULL;
1887 enum event_type type;
1890 /* the op is passed in via tok */
1893 if (arg->type == PRINT_OP && !arg->op.left) {
1894 /* handle single op */
1896 do_warning_event(event, "bad op token %s", token);
1906 do_warning_event(event, "bad op token %s", token);
1911 /* make an empty left */
1916 left->type = PRINT_NULL;
1917 arg->op.left = left;
1919 right = alloc_arg();
1923 arg->op.right = right;
1925 /* do not free the token, it belongs to an op */
1927 type = process_arg(event, right, tok);
1929 } else if (strcmp(token, "?") == 0) {
1935 /* copy the top arg to the left */
1938 arg->type = PRINT_OP;
1940 arg->op.left = left;
1943 /* it will set arg->op.right */
1944 type = process_cond(event, arg, tok);
1946 } else if (strcmp(token, ">>") == 0 ||
1947 strcmp(token, "<<") == 0 ||
1948 strcmp(token, "&") == 0 ||
1949 strcmp(token, "|") == 0 ||
1950 strcmp(token, "&&") == 0 ||
1951 strcmp(token, "||") == 0 ||
1952 strcmp(token, "-") == 0 ||
1953 strcmp(token, "+") == 0 ||
1954 strcmp(token, "*") == 0 ||
1955 strcmp(token, "^") == 0 ||
1956 strcmp(token, "/") == 0 ||
1957 strcmp(token, "%") == 0 ||
1958 strcmp(token, "<") == 0 ||
1959 strcmp(token, ">") == 0 ||
1960 strcmp(token, "<=") == 0 ||
1961 strcmp(token, ">=") == 0 ||
1962 strcmp(token, "==") == 0 ||
1963 strcmp(token, "!=") == 0) {
1969 /* copy the top arg to the left */
1972 arg->type = PRINT_OP;
1974 arg->op.left = left;
1975 arg->op.right = NULL;
1977 if (set_op_prio(arg) == -1) {
1978 event->flags |= EVENT_FL_FAILED;
1979 /* arg->op.op (= token) will be freed at out_free */
1984 type = read_token_item(&token);
1987 /* could just be a type pointer */
1988 if ((strcmp(arg->op.op, "*") == 0) &&
1989 type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1992 if (left->type != PRINT_ATOM) {
1993 do_warning_event(event, "bad pointer type");
1996 new_atom = realloc(left->atom.atom,
1997 strlen(left->atom.atom) + 3);
2001 left->atom.atom = new_atom;
2002 strcat(left->atom.atom, " *");
2010 right = alloc_arg();
2014 type = process_arg_token(event, right, tok, type);
2015 if (type == EVENT_ERROR) {
2017 /* token was freed in process_arg_token() via *tok */
2022 if (right->type == PRINT_OP &&
2023 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2024 struct print_arg tmp;
2026 /* rotate ops according to the priority */
2027 arg->op.right = right->op.left;
2033 arg->op.left = right;
2035 arg->op.right = right;
2038 } else if (strcmp(token, "[") == 0) {
2046 arg->type = PRINT_OP;
2048 arg->op.left = left;
2052 /* it will set arg->op.right */
2053 type = process_array(event, arg, tok);
2056 do_warning_event(event, "unknown op '%s'", token);
2057 event->flags |= EVENT_FL_FAILED;
2058 /* the arg is now the left side */
2062 if (type == EVENT_OP && strcmp(*tok, ":") != 0) {
2065 /* higher prios need to be closer to the root */
2066 prio = get_op_prio(*tok);
2068 if (prio > arg->op.prio)
2069 return process_op(event, arg, tok);
2071 return process_op(event, right, tok);
2077 do_warning_event(event, "%s: not enough memory!", __func__);
2084 static enum event_type
2085 process_entry(struct event_format *event __maybe_unused, struct print_arg *arg,
2088 enum event_type type;
2092 if (read_expected(EVENT_OP, "->") < 0)
2095 if (read_expect_type(EVENT_ITEM, &token) < 0)
2099 arg->type = PRINT_FIELD;
2100 arg->field.name = field;
2102 if (is_flag_field) {
2103 arg->field.field = pevent_find_any_field(event, arg->field.name);
2104 arg->field.field->flags |= FIELD_IS_FLAG;
2106 } else if (is_symbolic_field) {
2107 arg->field.field = pevent_find_any_field(event, arg->field.name);
2108 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
2109 is_symbolic_field = 0;
2112 type = read_token(&token);
2124 static int alloc_and_process_delim(struct event_format *event, char *next_token,
2125 struct print_arg **print_arg)
2127 struct print_arg *field;
2128 enum event_type type;
2132 field = alloc_arg();
2134 do_warning_event(event, "%s: not enough memory!", __func__);
2139 type = process_arg(event, field, &token);
2141 if (test_type_token(type, token, EVENT_DELIM, next_token)) {
2145 goto out_free_token;
2156 static char *arg_eval (struct print_arg *arg);
2158 static unsigned long long
2159 eval_type_str(unsigned long long val, const char *type, int pointer)
2169 if (type[len-1] != '*') {
2170 do_warning("pointer expected with non pointer type");
2176 do_warning("%s: not enough memory!", __func__);
2179 memcpy(ref, type, len);
2181 /* chop off the " *" */
2184 val = eval_type_str(val, ref, 0);
2189 /* check if this is a pointer */
2190 if (type[len - 1] == '*')
2193 /* Try to figure out the arg size*/
2194 if (strncmp(type, "struct", 6) == 0)
2198 if (strcmp(type, "u8") == 0)
2201 if (strcmp(type, "u16") == 0)
2202 return val & 0xffff;
2204 if (strcmp(type, "u32") == 0)
2205 return val & 0xffffffff;
2207 if (strcmp(type, "u64") == 0 ||
2208 strcmp(type, "s64") == 0)
2211 if (strcmp(type, "s8") == 0)
2212 return (unsigned long long)(char)val & 0xff;
2214 if (strcmp(type, "s16") == 0)
2215 return (unsigned long long)(short)val & 0xffff;
2217 if (strcmp(type, "s32") == 0)
2218 return (unsigned long long)(int)val & 0xffffffff;
2220 if (strncmp(type, "unsigned ", 9) == 0) {
2225 if (strcmp(type, "char") == 0) {
2227 return (unsigned long long)(char)val & 0xff;
2232 if (strcmp(type, "short") == 0) {
2234 return (unsigned long long)(short)val & 0xffff;
2236 return val & 0xffff;
2239 if (strcmp(type, "int") == 0) {
2241 return (unsigned long long)(int)val & 0xffffffff;
2243 return val & 0xffffffff;
2250 * Try to figure out the type.
2252 static unsigned long long
2253 eval_type(unsigned long long val, struct print_arg *arg, int pointer)
2255 if (arg->type != PRINT_TYPE) {
2256 do_warning("expected type argument");
2260 return eval_type_str(val, arg->typecast.type, pointer);
2263 static int arg_num_eval(struct print_arg *arg, long long *val)
2265 long long left, right;
2268 switch (arg->type) {
2270 *val = strtoll(arg->atom.atom, NULL, 0);
2273 ret = arg_num_eval(arg->typecast.item, val);
2276 *val = eval_type(*val, arg, 0);
2279 switch (arg->op.op[0]) {
2281 ret = arg_num_eval(arg->op.left, &left);
2284 ret = arg_num_eval(arg->op.right, &right);
2288 *val = left || right;
2290 *val = left | right;
2293 ret = arg_num_eval(arg->op.left, &left);
2296 ret = arg_num_eval(arg->op.right, &right);
2300 *val = left && right;
2302 *val = left & right;
2305 ret = arg_num_eval(arg->op.left, &left);
2308 ret = arg_num_eval(arg->op.right, &right);
2311 switch (arg->op.op[1]) {
2313 *val = left < right;
2316 *val = left << right;
2319 *val = left <= right;
2322 do_warning("unknown op '%s'", arg->op.op);
2327 ret = arg_num_eval(arg->op.left, &left);
2330 ret = arg_num_eval(arg->op.right, &right);
2333 switch (arg->op.op[1]) {
2335 *val = left > right;
2338 *val = left >> right;
2341 *val = left >= right;
2344 do_warning("unknown op '%s'", arg->op.op);
2349 ret = arg_num_eval(arg->op.left, &left);
2352 ret = arg_num_eval(arg->op.right, &right);
2356 if (arg->op.op[1] != '=') {
2357 do_warning("unknown op '%s'", arg->op.op);
2360 *val = left == right;
2363 ret = arg_num_eval(arg->op.left, &left);
2366 ret = arg_num_eval(arg->op.right, &right);
2370 switch (arg->op.op[1]) {
2372 *val = left != right;
2375 do_warning("unknown op '%s'", arg->op.op);
2380 /* check for negative */
2381 if (arg->op.left->type == PRINT_NULL)
2384 ret = arg_num_eval(arg->op.left, &left);
2387 ret = arg_num_eval(arg->op.right, &right);
2390 *val = left - right;
2393 if (arg->op.left->type == PRINT_NULL)
2396 ret = arg_num_eval(arg->op.left, &left);
2399 ret = arg_num_eval(arg->op.right, &right);
2402 *val = left + right;
2405 ret = arg_num_eval(arg->op.right, &right);
2411 do_warning("unknown op '%s'", arg->op.op);
2417 case PRINT_FIELD ... PRINT_SYMBOL:
2422 do_warning("invalid eval type %d", arg->type);
2429 static char *arg_eval (struct print_arg *arg)
2432 static char buf[24];
2434 switch (arg->type) {
2436 return arg->atom.atom;
2438 return arg_eval(arg->typecast.item);
2440 if (!arg_num_eval(arg, &val))
2442 sprintf(buf, "%lld", val);
2446 case PRINT_FIELD ... PRINT_SYMBOL:
2451 do_warning("invalid eval type %d", arg->type);
2458 static enum event_type
2459 process_fields(struct event_format *event, struct print_flag_sym **list, char **tok)
2461 enum event_type type;
2462 struct print_arg *arg = NULL;
2463 struct print_flag_sym *field;
2469 type = read_token_item(&token);
2470 if (test_type_token(type, token, EVENT_OP, "{"))
2478 type = process_arg(event, arg, &token);
2480 if (type == EVENT_OP)
2481 type = process_op(event, arg, &token);
2483 if (type == EVENT_ERROR)
2486 if (test_type_token(type, token, EVENT_DELIM, ","))
2489 field = calloc(1, sizeof(*field));
2493 value = arg_eval(arg);
2495 goto out_free_field;
2496 field->value = strdup(value);
2497 if (field->value == NULL)
2498 goto out_free_field;
2506 type = process_arg(event, arg, &token);
2507 if (test_type_token(type, token, EVENT_OP, "}"))
2508 goto out_free_field;
2510 value = arg_eval(arg);
2512 goto out_free_field;
2513 field->str = strdup(value);
2514 if (field->str == NULL)
2515 goto out_free_field;
2520 list = &field->next;
2523 type = read_token_item(&token);
2524 } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
2530 free_flag_sym(field);
2539 static enum event_type
2540 process_flags(struct event_format *event, struct print_arg *arg, char **tok)
2542 struct print_arg *field;
2543 enum event_type type;
2546 memset(arg, 0, sizeof(*arg));
2547 arg->type = PRINT_FLAGS;
2549 field = alloc_arg();
2551 do_warning_event(event, "%s: not enough memory!", __func__);
2555 type = process_field_arg(event, field, &token);
2557 /* Handle operations in the first argument */
2558 while (type == EVENT_OP)
2559 type = process_op(event, field, &token);
2561 if (test_type_token(type, token, EVENT_DELIM, ","))
2562 goto out_free_field;
2565 arg->flags.field = field;
2567 type = read_token_item(&token);
2568 if (event_item_type(type)) {
2569 arg->flags.delim = token;
2570 type = read_token_item(&token);
2573 if (test_type_token(type, token, EVENT_DELIM, ","))
2576 type = process_fields(event, &arg->flags.flags, &token);
2577 if (test_type_token(type, token, EVENT_DELIM, ")"))
2581 type = read_token_item(tok);
2592 static enum event_type
2593 process_symbols(struct event_format *event, struct print_arg *arg, char **tok)
2595 struct print_arg *field;
2596 enum event_type type;
2599 memset(arg, 0, sizeof(*arg));
2600 arg->type = PRINT_SYMBOL;
2602 field = alloc_arg();
2604 do_warning_event(event, "%s: not enough memory!", __func__);
2608 type = process_field_arg(event, field, &token);
2610 if (test_type_token(type, token, EVENT_DELIM, ","))
2611 goto out_free_field;
2613 arg->symbol.field = field;
2615 type = process_fields(event, &arg->symbol.symbols, &token);
2616 if (test_type_token(type, token, EVENT_DELIM, ")"))
2620 type = read_token_item(tok);
2631 static enum event_type
2632 process_hex_common(struct event_format *event, struct print_arg *arg,
2633 char **tok, enum print_arg_type type)
2635 memset(arg, 0, sizeof(*arg));
2638 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2641 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2644 return read_token_item(tok);
2647 free_arg(arg->hex.field);
2648 arg->hex.field = NULL;
2654 static enum event_type
2655 process_hex(struct event_format *event, struct print_arg *arg, char **tok)
2657 return process_hex_common(event, arg, tok, PRINT_HEX);
2660 static enum event_type
2661 process_hex_str(struct event_format *event, struct print_arg *arg,
2664 return process_hex_common(event, arg, tok, PRINT_HEX_STR);
2667 static enum event_type
2668 process_int_array(struct event_format *event, struct print_arg *arg, char **tok)
2670 memset(arg, 0, sizeof(*arg));
2671 arg->type = PRINT_INT_ARRAY;
2673 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2676 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2679 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2682 return read_token_item(tok);
2685 free_arg(arg->int_array.count);
2686 arg->int_array.count = NULL;
2688 free_arg(arg->int_array.field);
2689 arg->int_array.field = NULL;
2695 static enum event_type
2696 process_dynamic_array(struct event_format *event, struct print_arg *arg, char **tok)
2698 struct format_field *field;
2699 enum event_type type;
2702 memset(arg, 0, sizeof(*arg));
2703 arg->type = PRINT_DYNAMIC_ARRAY;
2706 * The item within the parenthesis is another field that holds
2707 * the index into where the array starts.
2709 type = read_token(&token);
2711 if (type != EVENT_ITEM)
2714 /* Find the field */
2716 field = pevent_find_field(event, token);
2720 arg->dynarray.field = field;
2721 arg->dynarray.index = 0;
2723 if (read_expected(EVENT_DELIM, ")") < 0)
2727 type = read_token_item(&token);
2729 if (type != EVENT_OP || strcmp(token, "[") != 0)
2735 do_warning_event(event, "%s: not enough memory!", __func__);
2740 type = process_arg(event, arg, &token);
2741 if (type == EVENT_ERROR)
2744 if (!test_type_token(type, token, EVENT_OP, "]"))
2748 type = read_token_item(tok);
2759 static enum event_type
2760 process_dynamic_array_len(struct event_format *event, struct print_arg *arg,
2763 struct format_field *field;
2764 enum event_type type;
2767 if (read_expect_type(EVENT_ITEM, &token) < 0)
2770 arg->type = PRINT_DYNAMIC_ARRAY_LEN;
2772 /* Find the field */
2773 field = pevent_find_field(event, token);
2777 arg->dynarray.field = field;
2778 arg->dynarray.index = 0;
2780 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);
3975 val = eval_num_arg(data, size, event, arg->symbol.field);
3976 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
3977 fval = eval_flag(flag->value);
3979 print_str_to_seq(s, format, len_arg, flag->str);
3986 if (arg->hex.field->type == PRINT_DYNAMIC_ARRAY) {
3987 unsigned long offset;
3988 offset = pevent_read_number(pevent,
3989 data + arg->hex.field->dynarray.field->offset,
3990 arg->hex.field->dynarray.field->size);
3991 hex = data + (offset & 0xffff);
3993 field = arg->hex.field->field.field;
3995 str = arg->hex.field->field.name;
3996 field = pevent_find_any_field(event, str);
3998 goto out_warning_field;
3999 arg->hex.field->field.field = field;
4001 hex = data + field->offset;
4003 len = eval_num_arg(data, size, event, arg->hex.size);
4004 for (i = 0; i < len; i++) {
4005 if (i && arg->type == PRINT_HEX)
4006 trace_seq_putc(s, ' ');
4007 trace_seq_printf(s, "%02x", hex[i]);
4011 case PRINT_INT_ARRAY: {
4015 if (arg->int_array.field->type == PRINT_DYNAMIC_ARRAY) {
4016 unsigned long offset;
4017 struct format_field *field =
4018 arg->int_array.field->dynarray.field;
4019 offset = pevent_read_number(pevent,
4020 data + field->offset,
4022 num = data + (offset & 0xffff);
4024 field = arg->int_array.field->field.field;
4026 str = arg->int_array.field->field.name;
4027 field = pevent_find_any_field(event, str);
4029 goto out_warning_field;
4030 arg->int_array.field->field.field = field;
4032 num = data + field->offset;
4034 len = eval_num_arg(data, size, event, arg->int_array.count);
4035 el_size = eval_num_arg(data, size, event,
4036 arg->int_array.el_size);
4037 for (i = 0; i < len; i++) {
4039 trace_seq_putc(s, ' ');
4042 trace_seq_printf(s, "%u", *(uint8_t *)num);
4043 } else if (el_size == 2) {
4044 trace_seq_printf(s, "%u", *(uint16_t *)num);
4045 } else if (el_size == 4) {
4046 trace_seq_printf(s, "%u", *(uint32_t *)num);
4047 } else if (el_size == 8) {
4048 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4050 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4051 el_size, *(uint8_t *)num);
4061 case PRINT_STRING: {
4064 if (arg->string.offset == -1) {
4065 struct format_field *f;
4067 f = pevent_find_any_field(event, arg->string.string);
4068 arg->string.offset = f->offset;
4070 str_offset = data2host4(pevent, data + arg->string.offset);
4071 str_offset &= 0xffff;
4072 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4076 print_str_to_seq(s, format, len_arg, arg->string.string);
4078 case PRINT_BITMASK: {
4082 if (arg->bitmask.offset == -1) {
4083 struct format_field *f;
4085 f = pevent_find_any_field(event, arg->bitmask.bitmask);
4086 arg->bitmask.offset = f->offset;
4088 bitmask_offset = data2host4(pevent, data + arg->bitmask.offset);
4089 bitmask_size = bitmask_offset >> 16;
4090 bitmask_offset &= 0xffff;
4091 print_bitmask_to_seq(pevent, s, format, len_arg,
4092 data + bitmask_offset, bitmask_size);
4097 * The only op for string should be ? :
4099 if (arg->op.op[0] != '?')
4101 val = eval_num_arg(data, size, event, arg->op.left);
4103 print_str_arg(s, data, size, event,
4104 format, len_arg, arg->op.right->op.left);
4106 print_str_arg(s, data, size, event,
4107 format, len_arg, arg->op.right->op.right);
4110 process_defined_func(s, data, size, event, arg);
4120 do_warning_event(event, "%s: field %s not found",
4121 __func__, arg->field.name);
4124 static unsigned long long
4125 process_defined_func(struct trace_seq *s, void *data, int size,
4126 struct event_format *event, struct print_arg *arg)
4128 struct pevent_function_handler *func_handle = arg->func.func;
4129 struct pevent_func_params *param;
4130 unsigned long long *args;
4131 unsigned long long ret;
4132 struct print_arg *farg;
4133 struct trace_seq str;
4135 struct save_str *next;
4137 } *strings = NULL, *string;
4140 if (!func_handle->nr_args) {
4141 ret = (*func_handle->func)(s, NULL);
4145 farg = arg->func.args;
4146 param = func_handle->params;
4149 args = malloc(sizeof(*args) * func_handle->nr_args);
4153 for (i = 0; i < func_handle->nr_args; i++) {
4154 switch (param->type) {
4155 case PEVENT_FUNC_ARG_INT:
4156 case PEVENT_FUNC_ARG_LONG:
4157 case PEVENT_FUNC_ARG_PTR:
4158 args[i] = eval_num_arg(data, size, event, farg);
4160 case PEVENT_FUNC_ARG_STRING:
4161 trace_seq_init(&str);
4162 print_str_arg(&str, data, size, event, "%s", -1, farg);
4163 trace_seq_terminate(&str);
4164 string = malloc(sizeof(*string));
4166 do_warning_event(event, "%s(%d): malloc str",
4167 __func__, __LINE__);
4170 string->next = strings;
4171 string->str = strdup(str.buffer);
4174 do_warning_event(event, "%s(%d): malloc str",
4175 __func__, __LINE__);
4178 args[i] = (uintptr_t)string->str;
4180 trace_seq_destroy(&str);
4184 * Something went totally wrong, this is not
4185 * an input error, something in this code broke.
4187 do_warning_event(event, "Unexpected end of arguments\n");
4191 param = param->next;
4194 ret = (*func_handle->func)(s, args);
4199 strings = string->next;
4205 /* TBD : handle return type here */
4209 static void free_args(struct print_arg *args)
4211 struct print_arg *next;
4221 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event_format *event)
4223 struct pevent *pevent = event->pevent;
4224 struct format_field *field, *ip_field;
4225 struct print_arg *args, *arg, **next;
4226 unsigned long long ip, val;
4231 field = pevent->bprint_buf_field;
4232 ip_field = pevent->bprint_ip_field;
4235 field = pevent_find_field(event, "buf");
4237 do_warning_event(event, "can't find buffer field for binary printk");
4240 ip_field = pevent_find_field(event, "ip");
4242 do_warning_event(event, "can't find ip field for binary printk");
4245 pevent->bprint_buf_field = field;
4246 pevent->bprint_ip_field = ip_field;
4249 ip = pevent_read_number(pevent, data + ip_field->offset, ip_field->size);
4252 * The first arg is the IP pointer.
4256 do_warning_event(event, "%s(%d): not enough memory!",
4257 __func__, __LINE__);
4264 arg->type = PRINT_ATOM;
4266 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4269 /* skip the first "%ps: " */
4270 for (ptr = fmt + 5, bptr = data + field->offset;
4271 bptr < data + size && *ptr; ptr++) {
4306 vsize = pevent->long_size;
4320 /* the pointers are always 4 bytes aligned */
4321 bptr = (void *)(((unsigned long)bptr + 3) &
4323 val = pevent_read_number(pevent, bptr, vsize);
4327 do_warning_event(event, "%s(%d): not enough memory!",
4328 __func__, __LINE__);
4332 arg->type = PRINT_ATOM;
4333 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4340 * The '*' case means that an arg is used as the length.
4341 * We need to continue to figure out for what.
4350 do_warning_event(event, "%s(%d): not enough memory!",
4351 __func__, __LINE__);
4355 arg->type = PRINT_BSTRING;
4356 arg->string.string = strdup(bptr);
4357 if (!arg->string.string)
4359 bptr += strlen(bptr) + 1;
4376 get_bprint_format(void *data, int size __maybe_unused,
4377 struct event_format *event)
4379 struct pevent *pevent = event->pevent;
4380 unsigned long long addr;
4381 struct format_field *field;
4382 struct printk_map *printk;
4385 field = pevent->bprint_fmt_field;
4388 field = pevent_find_field(event, "fmt");
4390 do_warning_event(event, "can't find format field for binary printk");
4393 pevent->bprint_fmt_field = field;
4396 addr = pevent_read_number(pevent, data + field->offset, field->size);
4398 printk = find_printk(pevent, addr);
4400 if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4405 if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
4411 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4412 struct event_format *event, struct print_arg *arg)
4415 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4417 if (arg->type == PRINT_FUNC) {
4418 process_defined_func(s, data, size, event, arg);
4422 if (arg->type != PRINT_FIELD) {
4423 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4429 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4430 if (!arg->field.field) {
4432 pevent_find_any_field(event, arg->field.name);
4433 if (!arg->field.field) {
4434 do_warning_event(event, "%s: field %s not found",
4435 __func__, arg->field.name);
4439 if (arg->field.field->size != 6) {
4440 trace_seq_printf(s, "INVALIDMAC");
4443 buf = data + arg->field.field->offset;
4444 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4447 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4452 fmt = "%03d.%03d.%03d.%03d";
4454 fmt = "%d.%d.%d.%d";
4456 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4459 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4461 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4462 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4465 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4467 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4470 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4473 unsigned char zerolength[8];
4478 bool needcolon = false;
4480 struct in6_addr in6;
4482 memcpy(&in6, addr, sizeof(struct in6_addr));
4484 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4486 memset(zerolength, 0, sizeof(zerolength));
4493 /* find position of longest 0 run */
4494 for (i = 0; i < range; i++) {
4495 for (j = i; j < range; j++) {
4496 if (in6.s6_addr16[j] != 0)
4501 for (i = 0; i < range; i++) {
4502 if (zerolength[i] > longest) {
4503 longest = zerolength[i];
4507 if (longest == 1) /* don't compress a single 0 */
4511 for (i = 0; i < range; i++) {
4512 if (i == colonpos) {
4513 if (needcolon || i == 0)
4514 trace_seq_printf(s, ":");
4515 trace_seq_printf(s, ":");
4521 trace_seq_printf(s, ":");
4524 /* hex u16 without leading 0s */
4525 word = ntohs(in6.s6_addr16[i]);
4529 trace_seq_printf(s, "%x%02x", hi, lo);
4531 trace_seq_printf(s, "%x", lo);
4538 trace_seq_printf(s, ":");
4539 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4545 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4549 for (j = 0; j < 16; j += 2) {
4550 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4551 if (i == 'I' && j < 14)
4552 trace_seq_printf(s, ":");
4557 * %pi4 print an IPv4 address with leading zeros
4558 * %pI4 print an IPv4 address without leading zeros
4559 * %pi6 print an IPv6 address without colons
4560 * %pI6 print an IPv6 address with colons
4561 * %pI6c print an IPv6 address in compressed form with colons
4562 * %pISpc print an IP address based on sockaddr; p adds port.
4564 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4565 void *data, int size, struct event_format *event,
4566 struct print_arg *arg)
4570 if (arg->type == PRINT_FUNC) {
4571 process_defined_func(s, data, size, event, arg);
4575 if (arg->type != PRINT_FIELD) {
4576 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4580 if (!arg->field.field) {
4582 pevent_find_any_field(event, arg->field.name);
4583 if (!arg->field.field) {
4584 do_warning("%s: field %s not found",
4585 __func__, arg->field.name);
4590 buf = data + arg->field.field->offset;
4592 if (arg->field.field->size != 4) {
4593 trace_seq_printf(s, "INVALIDIPv4");
4596 print_ip4_addr(s, i, buf);
4601 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4602 void *data, int size, struct event_format *event,
4603 struct print_arg *arg)
4610 if (i == 'I' && *ptr == 'c') {
4616 if (arg->type == PRINT_FUNC) {
4617 process_defined_func(s, data, size, event, arg);
4621 if (arg->type != PRINT_FIELD) {
4622 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4626 if (!arg->field.field) {
4628 pevent_find_any_field(event, arg->field.name);
4629 if (!arg->field.field) {
4630 do_warning("%s: field %s not found",
4631 __func__, arg->field.name);
4636 buf = data + arg->field.field->offset;
4638 if (arg->field.field->size != 16) {
4639 trace_seq_printf(s, "INVALIDIPv6");
4644 print_ip6c_addr(s, buf);
4646 print_ip6_addr(s, i, buf);
4651 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4652 void *data, int size, struct event_format *event,
4653 struct print_arg *arg)
4655 char have_c = 0, have_p = 0;
4657 struct sockaddr_storage *sa;
4674 if (arg->type == PRINT_FUNC) {
4675 process_defined_func(s, data, size, event, arg);
4679 if (arg->type != PRINT_FIELD) {
4680 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4684 if (!arg->field.field) {
4686 pevent_find_any_field(event, arg->field.name);
4687 if (!arg->field.field) {
4688 do_warning("%s: field %s not found",
4689 __func__, arg->field.name);
4694 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4696 if (sa->ss_family == AF_INET) {
4697 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4699 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4700 trace_seq_printf(s, "INVALIDIPv4");
4704 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4706 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4709 } else if (sa->ss_family == AF_INET6) {
4710 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4712 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4713 trace_seq_printf(s, "INVALIDIPv6");
4718 trace_seq_printf(s, "[");
4720 buf = (unsigned char *) &sa6->sin6_addr;
4722 print_ip6c_addr(s, buf);
4724 print_ip6_addr(s, i, buf);
4727 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4733 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4734 void *data, int size, struct event_format *event,
4735 struct print_arg *arg)
4737 char i = *ptr; /* 'i' or 'I' */
4750 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4753 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4756 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4765 static int is_printable_array(char *p, unsigned int len)
4769 for (i = 0; i < len && p[i]; i++)
4770 if (!isprint(p[i]) && !isspace(p[i]))
4775 void pevent_print_field(struct trace_seq *s, void *data,
4776 struct format_field *field)
4778 unsigned long long val;
4779 unsigned int offset, len, i;
4780 struct pevent *pevent = field->event->pevent;
4782 if (field->flags & FIELD_IS_ARRAY) {
4783 offset = field->offset;
4785 if (field->flags & FIELD_IS_DYNAMIC) {
4786 val = pevent_read_number(pevent, data + offset, len);
4791 if (field->flags & FIELD_IS_STRING &&
4792 is_printable_array(data + offset, len)) {
4793 trace_seq_printf(s, "%s", (char *)data + offset);
4795 trace_seq_puts(s, "ARRAY[");
4796 for (i = 0; i < len; i++) {
4798 trace_seq_puts(s, ", ");
4799 trace_seq_printf(s, "%02x",
4800 *((unsigned char *)data + offset + i));
4802 trace_seq_putc(s, ']');
4803 field->flags &= ~FIELD_IS_STRING;
4806 val = pevent_read_number(pevent, data + field->offset,
4808 if (field->flags & FIELD_IS_POINTER) {
4809 trace_seq_printf(s, "0x%llx", val);
4810 } else if (field->flags & FIELD_IS_SIGNED) {
4811 switch (field->size) {
4814 * If field is long then print it in hex.
4815 * A long usually stores pointers.
4817 if (field->flags & FIELD_IS_LONG)
4818 trace_seq_printf(s, "0x%x", (int)val);
4820 trace_seq_printf(s, "%d", (int)val);
4823 trace_seq_printf(s, "%2d", (short)val);
4826 trace_seq_printf(s, "%1d", (char)val);
4829 trace_seq_printf(s, "%lld", val);
4832 if (field->flags & FIELD_IS_LONG)
4833 trace_seq_printf(s, "0x%llx", val);
4835 trace_seq_printf(s, "%llu", val);
4840 void pevent_print_fields(struct trace_seq *s, void *data,
4841 int size __maybe_unused, struct event_format *event)
4843 struct format_field *field;
4845 field = event->format.fields;
4847 trace_seq_printf(s, " %s=", field->name);
4848 pevent_print_field(s, data, field);
4849 field = field->next;
4853 static void pretty_print(struct trace_seq *s, void *data, int size, struct event_format *event)
4855 struct pevent *pevent = event->pevent;
4856 struct print_fmt *print_fmt = &event->print_fmt;
4857 struct print_arg *arg = print_fmt->args;
4858 struct print_arg *args = NULL;
4859 const char *ptr = print_fmt->format;
4860 unsigned long long val;
4861 struct func_map *func;
4862 const char *saveptr;
4864 char *bprint_fmt = NULL;
4872 if (event->flags & EVENT_FL_FAILED) {
4873 trace_seq_printf(s, "[FAILED TO PARSE]");
4874 pevent_print_fields(s, data, size, event);
4878 if (event->flags & EVENT_FL_ISBPRINT) {
4879 bprint_fmt = get_bprint_format(data, size, event);
4880 args = make_bprint_args(bprint_fmt, data, size, event);
4885 for (; *ptr; ptr++) {
4891 trace_seq_putc(s, '\n');
4894 trace_seq_putc(s, '\t');
4897 trace_seq_putc(s, '\r');
4900 trace_seq_putc(s, '\\');
4903 trace_seq_putc(s, *ptr);
4907 } else if (*ptr == '%') {
4915 trace_seq_putc(s, '%');
4918 /* FIXME: need to handle properly */
4930 /* The argument is the length. */
4932 do_warning_event(event, "no argument match");
4933 event->flags |= EVENT_FL_FAILED;
4936 len_arg = eval_num_arg(data, size, event, arg);
4947 if (pevent->long_size == 4)
4952 if (isalnum(ptr[1]))
4955 if (*ptr == 'F' || *ptr == 'f' ||
4956 *ptr == 'S' || *ptr == 's') {
4958 } else if (*ptr == 'M' || *ptr == 'm') {
4959 print_mac_arg(s, *ptr, data, size, event, arg);
4962 } else if (*ptr == 'I' || *ptr == 'i') {
4965 n = print_ip_arg(s, ptr, data, size, event, arg);
4980 do_warning_event(event, "no argument match");
4981 event->flags |= EVENT_FL_FAILED;
4985 len = ((unsigned long)ptr + 1) -
4986 (unsigned long)saveptr;
4988 /* should never happen */
4990 do_warning_event(event, "bad format!");
4991 event->flags |= EVENT_FL_FAILED;
4995 memcpy(format, saveptr, len);
4998 val = eval_num_arg(data, size, event, arg);
5002 func = find_func(pevent, val);
5004 trace_seq_puts(s, func->func);
5005 if (show_func == 'F')
5012 if (pevent->long_size == 8 && ls == 1 &&
5013 sizeof(long) != 8) {
5016 /* make %l into %ll */
5017 if (ls == 1 && (p = strchr(format, 'l')))
5018 memmove(p+1, p, strlen(p)+1);
5019 else if (strcmp(format, "%p") == 0)
5020 strcpy(format, "0x%llx");
5026 trace_seq_printf(s, format, len_arg, (char)val);
5028 trace_seq_printf(s, format, (char)val);
5032 trace_seq_printf(s, format, len_arg, (short)val);
5034 trace_seq_printf(s, format, (short)val);
5038 trace_seq_printf(s, format, len_arg, (int)val);
5040 trace_seq_printf(s, format, (int)val);
5044 trace_seq_printf(s, format, len_arg, (long)val);
5046 trace_seq_printf(s, format, (long)val);
5050 trace_seq_printf(s, format, len_arg,
5053 trace_seq_printf(s, format, (long long)val);
5056 do_warning_event(event, "bad count (%d)", ls);
5057 event->flags |= EVENT_FL_FAILED;
5062 do_warning_event(event, "no matching argument");
5063 event->flags |= EVENT_FL_FAILED;
5067 len = ((unsigned long)ptr + 1) -
5068 (unsigned long)saveptr;
5070 /* should never happen */
5072 do_warning_event(event, "bad format!");
5073 event->flags |= EVENT_FL_FAILED;
5077 memcpy(format, saveptr, len);
5081 /* Use helper trace_seq */
5083 print_str_arg(&p, data, size, event,
5084 format, len_arg, arg);
5085 trace_seq_terminate(&p);
5086 trace_seq_puts(s, p.buffer);
5087 trace_seq_destroy(&p);
5091 trace_seq_printf(s, ">%c<", *ptr);
5095 trace_seq_putc(s, *ptr);
5098 if (event->flags & EVENT_FL_FAILED) {
5100 trace_seq_printf(s, "[FAILED TO PARSE]");
5110 * pevent_data_lat_fmt - parse the data for the latency format
5111 * @pevent: a handle to the pevent
5112 * @s: the trace_seq to write to
5113 * @record: the record to read from
5115 * This parses out the Latency format (interrupts disabled,
5116 * need rescheduling, in hard/soft interrupt, preempt count
5117 * and lock depth) and places it into the trace_seq.
5119 void pevent_data_lat_fmt(struct pevent *pevent,
5120 struct trace_seq *s, struct pevent_record *record)
5122 static int check_lock_depth = 1;
5123 static int check_migrate_disable = 1;
5124 static int lock_depth_exists;
5125 static int migrate_disable_exists;
5126 unsigned int lat_flags;
5129 int migrate_disable;
5132 void *data = record->data;
5134 lat_flags = parse_common_flags(pevent, data);
5135 pc = parse_common_pc(pevent, data);
5136 /* lock_depth may not always exist */
5137 if (lock_depth_exists)
5138 lock_depth = parse_common_lock_depth(pevent, data);
5139 else if (check_lock_depth) {
5140 lock_depth = parse_common_lock_depth(pevent, data);
5142 check_lock_depth = 0;
5144 lock_depth_exists = 1;
5147 /* migrate_disable may not always exist */
5148 if (migrate_disable_exists)
5149 migrate_disable = parse_common_migrate_disable(pevent, data);
5150 else if (check_migrate_disable) {
5151 migrate_disable = parse_common_migrate_disable(pevent, data);
5152 if (migrate_disable < 0)
5153 check_migrate_disable = 0;
5155 migrate_disable_exists = 1;
5158 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5159 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5161 trace_seq_printf(s, "%c%c%c",
5162 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5163 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5165 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5167 (hardirq && softirq) ? 'H' :
5168 hardirq ? 'h' : softirq ? 's' : '.');
5171 trace_seq_printf(s, "%x", pc);
5173 trace_seq_putc(s, '.');
5175 if (migrate_disable_exists) {
5176 if (migrate_disable < 0)
5177 trace_seq_putc(s, '.');
5179 trace_seq_printf(s, "%d", migrate_disable);
5182 if (lock_depth_exists) {
5184 trace_seq_putc(s, '.');
5186 trace_seq_printf(s, "%d", lock_depth);
5189 trace_seq_terminate(s);
5193 * pevent_data_type - parse out the given event type
5194 * @pevent: a handle to the pevent
5195 * @rec: the record to read from
5197 * This returns the event id from the @rec.
5199 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
5201 return trace_parse_common_type(pevent, rec->data);
5205 * pevent_data_event_from_type - find the event by a given type
5206 * @pevent: a handle to the pevent
5207 * @type: the type of the event.
5209 * This returns the event form a given @type;
5211 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
5213 return pevent_find_event(pevent, type);
5217 * pevent_data_pid - parse the PID from record
5218 * @pevent: a handle to the pevent
5219 * @rec: the record to parse
5221 * This returns the PID from a record.
5223 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
5225 return parse_common_pid(pevent, rec->data);
5229 * pevent_data_preempt_count - parse the preempt count from the record
5230 * @pevent: a handle to the pevent
5231 * @rec: the record to parse
5233 * This returns the preempt count from a record.
5235 int pevent_data_preempt_count(struct pevent *pevent, struct pevent_record *rec)
5237 return parse_common_pc(pevent, rec->data);
5241 * pevent_data_flags - parse the latency flags from the record
5242 * @pevent: a handle to the pevent
5243 * @rec: the record to parse
5245 * This returns the latency flags from a record.
5247 * Use trace_flag_type enum for the flags (see event-parse.h).
5249 int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec)
5251 return parse_common_flags(pevent, rec->data);
5255 * pevent_data_comm_from_pid - return the command line from PID
5256 * @pevent: a handle to the pevent
5257 * @pid: the PID of the task to search for
5259 * This returns a pointer to the command line that has the given
5262 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid)
5266 comm = find_cmdline(pevent, pid);
5270 static struct cmdline *
5271 pid_from_cmdlist(struct pevent *pevent, const char *comm, struct cmdline *next)
5273 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5276 cmdlist = cmdlist->next;
5278 cmdlist = pevent->cmdlist;
5280 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5281 cmdlist = cmdlist->next;
5283 return (struct cmdline *)cmdlist;
5287 * pevent_data_pid_from_comm - return the pid from a given comm
5288 * @pevent: a handle to the pevent
5289 * @comm: the cmdline to find the pid from
5290 * @next: the cmdline structure to find the next comm
5292 * This returns the cmdline structure that holds a pid for a given
5293 * comm, or NULL if none found. As there may be more than one pid for
5294 * a given comm, the result of this call can be passed back into
5295 * a recurring call in the @next paramater, and then it will find the
5297 * Also, it does a linear seach, so it may be slow.
5299 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
5300 struct cmdline *next)
5302 struct cmdline *cmdline;
5305 * If the cmdlines have not been converted yet, then use
5308 if (!pevent->cmdlines)
5309 return pid_from_cmdlist(pevent, comm, next);
5313 * The next pointer could have been still from
5314 * a previous call before cmdlines were created
5316 if (next < pevent->cmdlines ||
5317 next >= pevent->cmdlines + pevent->cmdline_count)
5324 cmdline = pevent->cmdlines;
5326 while (cmdline < pevent->cmdlines + pevent->cmdline_count) {
5327 if (strcmp(cmdline->comm, comm) == 0)
5335 * pevent_cmdline_pid - return the pid associated to a given cmdline
5336 * @cmdline: The cmdline structure to get the pid from
5338 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5341 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline)
5343 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5349 * If cmdlines have not been created yet, or cmdline is
5350 * not part of the array, then treat it as a cmdlist instead.
5352 if (!pevent->cmdlines ||
5353 cmdline < pevent->cmdlines ||
5354 cmdline >= pevent->cmdlines + pevent->cmdline_count)
5355 return cmdlist->pid;
5357 return cmdline->pid;
5361 * pevent_data_comm_from_pid - parse the data into the print format
5362 * @s: the trace_seq to write to
5363 * @event: the handle to the event
5364 * @record: the record to read from
5366 * This parses the raw @data using the given @event information and
5367 * writes the print format into the trace_seq.
5369 void pevent_event_info(struct trace_seq *s, struct event_format *event,
5370 struct pevent_record *record)
5372 int print_pretty = 1;
5374 if (event->pevent->print_raw || (event->flags & EVENT_FL_PRINTRAW))
5375 pevent_print_fields(s, record->data, record->size, event);
5378 if (event->handler && !(event->flags & EVENT_FL_NOHANDLE))
5379 print_pretty = event->handler(s, record, event,
5383 pretty_print(s, record->data, record->size, event);
5386 trace_seq_terminate(s);
5389 static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
5391 if (!use_trace_clock)
5394 if (!strcmp(trace_clock, "local") || !strcmp(trace_clock, "global")
5395 || !strcmp(trace_clock, "uptime") || !strcmp(trace_clock, "perf"))
5398 /* trace_clock is setting in tsc or counter mode */
5403 * pevent_find_event_by_record - return the event from a given record
5404 * @pevent: a handle to the pevent
5405 * @record: The record to get the event from
5407 * Returns the associated event for a given record, or NULL if non is
5410 struct event_format *
5411 pevent_find_event_by_record(struct pevent *pevent, struct pevent_record *record)
5415 if (record->size < 0) {
5416 do_warning("ug! negative record size %d", record->size);
5420 type = trace_parse_common_type(pevent, record->data);
5422 return pevent_find_event(pevent, type);
5426 * pevent_print_event_task - Write the event task comm, pid and CPU
5427 * @pevent: a handle to the pevent
5428 * @s: the trace_seq to write to
5429 * @event: the handle to the record's event
5430 * @record: The record to get the event from
5432 * Writes the tasks comm, pid and CPU to @s.
5434 void pevent_print_event_task(struct pevent *pevent, struct trace_seq *s,
5435 struct event_format *event,
5436 struct pevent_record *record)
5438 void *data = record->data;
5442 pid = parse_common_pid(pevent, data);
5443 comm = find_cmdline(pevent, pid);
5445 if (pevent->latency_format) {
5446 trace_seq_printf(s, "%8.8s-%-5d %3d",
5447 comm, pid, record->cpu);
5449 trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
5453 * pevent_print_event_time - Write the event timestamp
5454 * @pevent: a handle to the pevent
5455 * @s: the trace_seq to write to
5456 * @event: the handle to the record's event
5457 * @record: The record to get the event from
5458 * @use_trace_clock: Set to parse according to the @pevent->trace_clock
5460 * Writes the timestamp of the record into @s.
5462 void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
5463 struct event_format *event,
5464 struct pevent_record *record,
5465 bool use_trace_clock)
5468 unsigned long usecs;
5469 unsigned long nsecs;
5471 bool use_usec_format;
5473 use_usec_format = is_timestamp_in_us(pevent->trace_clock,
5475 if (use_usec_format) {
5476 secs = record->ts / NSEC_PER_SEC;
5477 nsecs = record->ts - secs * NSEC_PER_SEC;
5480 if (pevent->latency_format) {
5481 pevent_data_lat_fmt(pevent, s, record);
5484 if (use_usec_format) {
5485 if (pevent->flags & PEVENT_NSEC_OUTPUT) {
5489 usecs = (nsecs + 500) / NSEC_PER_USEC;
5490 /* To avoid usecs larger than 1 sec */
5491 if (usecs >= USEC_PER_SEC) {
5492 usecs -= USEC_PER_SEC;
5498 trace_seq_printf(s, " %5lu.%0*lu:", secs, p, usecs);
5500 trace_seq_printf(s, " %12llu:", record->ts);
5504 * pevent_print_event_data - Write the event data section
5505 * @pevent: a handle to the pevent
5506 * @s: the trace_seq to write to
5507 * @event: the handle to the record's event
5508 * @record: The record to get the event from
5510 * Writes the parsing of the record's data to @s.
5512 void pevent_print_event_data(struct pevent *pevent, struct trace_seq *s,
5513 struct event_format *event,
5514 struct pevent_record *record)
5516 static const char *spaces = " "; /* 20 spaces */
5519 trace_seq_printf(s, " %s: ", event->name);
5521 /* Space out the event names evenly. */
5522 len = strlen(event->name);
5524 trace_seq_printf(s, "%.*s", 20 - len, spaces);
5526 pevent_event_info(s, event, record);
5529 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
5530 struct pevent_record *record, bool use_trace_clock)
5532 struct event_format *event;
5534 event = pevent_find_event_by_record(pevent, record);
5536 do_warning("ug! no event found for type %d",
5537 trace_parse_common_type(pevent, record->data));
5541 pevent_print_event_task(pevent, s, event, record);
5542 pevent_print_event_time(pevent, s, event, record, use_trace_clock);
5543 pevent_print_event_data(pevent, s, event, record);
5546 static int events_id_cmp(const void *a, const void *b)
5548 struct event_format * const * ea = a;
5549 struct event_format * const * eb = b;
5551 if ((*ea)->id < (*eb)->id)
5554 if ((*ea)->id > (*eb)->id)
5560 static int events_name_cmp(const void *a, const void *b)
5562 struct event_format * const * ea = a;
5563 struct event_format * const * eb = b;
5566 res = strcmp((*ea)->name, (*eb)->name);
5570 res = strcmp((*ea)->system, (*eb)->system);
5574 return events_id_cmp(a, b);
5577 static int events_system_cmp(const void *a, const void *b)
5579 struct event_format * const * ea = a;
5580 struct event_format * const * eb = b;
5583 res = strcmp((*ea)->system, (*eb)->system);
5587 res = strcmp((*ea)->name, (*eb)->name);
5591 return events_id_cmp(a, b);
5594 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
5596 struct event_format **events;
5597 int (*sort)(const void *a, const void *b);
5599 events = pevent->sort_events;
5601 if (events && pevent->last_type == sort_type)
5605 events = malloc(sizeof(*events) * (pevent->nr_events + 1));
5609 memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
5610 events[pevent->nr_events] = NULL;
5612 pevent->sort_events = events;
5614 /* the internal events are sorted by id */
5615 if (sort_type == EVENT_SORT_ID) {
5616 pevent->last_type = sort_type;
5621 switch (sort_type) {
5623 sort = events_id_cmp;
5625 case EVENT_SORT_NAME:
5626 sort = events_name_cmp;
5628 case EVENT_SORT_SYSTEM:
5629 sort = events_system_cmp;
5635 qsort(events, pevent->nr_events, sizeof(*events), sort);
5636 pevent->last_type = sort_type;
5641 static struct format_field **
5642 get_event_fields(const char *type, const char *name,
5643 int count, struct format_field *list)
5645 struct format_field **fields;
5646 struct format_field *field;
5649 fields = malloc(sizeof(*fields) * (count + 1));
5653 for (field = list; field; field = field->next) {
5654 fields[i++] = field;
5655 if (i == count + 1) {
5656 do_warning("event %s has more %s fields than specified",
5664 do_warning("event %s has less %s fields than specified",
5673 * pevent_event_common_fields - return a list of common fields for an event
5674 * @event: the event to return the common fields of.
5676 * Returns an allocated array of fields. The last item in the array is NULL.
5677 * The array must be freed with free().
5679 struct format_field **pevent_event_common_fields(struct event_format *event)
5681 return get_event_fields("common", event->name,
5682 event->format.nr_common,
5683 event->format.common_fields);
5687 * pevent_event_fields - return a list of event specific fields for an event
5688 * @event: the event to return the fields of.
5690 * Returns an allocated array of fields. The last item in the array is NULL.
5691 * The array must be freed with free().
5693 struct format_field **pevent_event_fields(struct event_format *event)
5695 return get_event_fields("event", event->name,
5696 event->format.nr_fields,
5697 event->format.fields);
5700 static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
5702 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5704 trace_seq_puts(s, ", ");
5705 print_fields(s, field->next);
5710 static void print_args(struct print_arg *args)
5712 int print_paren = 1;
5715 switch (args->type) {
5720 printf("%s", args->atom.atom);
5723 printf("REC->%s", args->field.name);
5726 printf("__print_flags(");
5727 print_args(args->flags.field);
5728 printf(", %s, ", args->flags.delim);
5730 print_fields(&s, args->flags.flags);
5731 trace_seq_do_printf(&s);
5732 trace_seq_destroy(&s);
5736 printf("__print_symbolic(");
5737 print_args(args->symbol.field);
5740 print_fields(&s, args->symbol.symbols);
5741 trace_seq_do_printf(&s);
5742 trace_seq_destroy(&s);
5746 printf("__print_hex(");
5747 print_args(args->hex.field);
5749 print_args(args->hex.size);
5753 printf("__print_hex_str(");
5754 print_args(args->hex.field);
5756 print_args(args->hex.size);
5759 case PRINT_INT_ARRAY:
5760 printf("__print_array(");
5761 print_args(args->int_array.field);
5763 print_args(args->int_array.count);
5765 print_args(args->int_array.el_size);
5770 printf("__get_str(%s)", args->string.string);
5773 printf("__get_bitmask(%s)", args->bitmask.bitmask);
5776 printf("(%s)", args->typecast.type);
5777 print_args(args->typecast.item);
5780 if (strcmp(args->op.op, ":") == 0)
5784 print_args(args->op.left);
5785 printf(" %s ", args->op.op);
5786 print_args(args->op.right);
5791 /* we should warn... */
5796 print_args(args->next);
5800 static void parse_header_field(const char *field,
5801 int *offset, int *size, int mandatory)
5803 unsigned long long save_input_buf_ptr;
5804 unsigned long long save_input_buf_siz;
5808 save_input_buf_ptr = input_buf_ptr;
5809 save_input_buf_siz = input_buf_siz;
5811 if (read_expected(EVENT_ITEM, "field") < 0)
5813 if (read_expected(EVENT_OP, ":") < 0)
5817 if (read_expect_type(EVENT_ITEM, &token) < 0)
5822 * If this is not a mandatory field, then test it first.
5825 if (read_expected(EVENT_ITEM, field) < 0)
5828 if (read_expect_type(EVENT_ITEM, &token) < 0)
5830 if (strcmp(token, field) != 0)
5835 if (read_expected(EVENT_OP, ";") < 0)
5837 if (read_expected(EVENT_ITEM, "offset") < 0)
5839 if (read_expected(EVENT_OP, ":") < 0)
5841 if (read_expect_type(EVENT_ITEM, &token) < 0)
5843 *offset = atoi(token);
5845 if (read_expected(EVENT_OP, ";") < 0)
5847 if (read_expected(EVENT_ITEM, "size") < 0)
5849 if (read_expected(EVENT_OP, ":") < 0)
5851 if (read_expect_type(EVENT_ITEM, &token) < 0)
5853 *size = atoi(token);
5855 if (read_expected(EVENT_OP, ";") < 0)
5857 type = read_token(&token);
5858 if (type != EVENT_NEWLINE) {
5859 /* newer versions of the kernel have a "signed" type */
5860 if (type != EVENT_ITEM)
5863 if (strcmp(token, "signed") != 0)
5868 if (read_expected(EVENT_OP, ":") < 0)
5871 if (read_expect_type(EVENT_ITEM, &token))
5875 if (read_expected(EVENT_OP, ";") < 0)
5878 if (read_expect_type(EVENT_NEWLINE, &token))
5886 input_buf_ptr = save_input_buf_ptr;
5887 input_buf_siz = save_input_buf_siz;
5894 * pevent_parse_header_page - parse the data stored in the header page
5895 * @pevent: the handle to the pevent
5896 * @buf: the buffer storing the header page format string
5897 * @size: the size of @buf
5898 * @long_size: the long size to use if there is no header
5900 * This parses the header page format for information on the
5901 * ring buffer used. The @buf should be copied from
5903 * /sys/kernel/debug/tracing/events/header_page
5905 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
5912 * Old kernels did not have header page info.
5913 * Sorry but we just use what we find here in user space.
5915 pevent->header_page_ts_size = sizeof(long long);
5916 pevent->header_page_size_size = long_size;
5917 pevent->header_page_data_offset = sizeof(long long) + long_size;
5918 pevent->old_format = 1;
5921 init_input_buf(buf, size);
5923 parse_header_field("timestamp", &pevent->header_page_ts_offset,
5924 &pevent->header_page_ts_size, 1);
5925 parse_header_field("commit", &pevent->header_page_size_offset,
5926 &pevent->header_page_size_size, 1);
5927 parse_header_field("overwrite", &pevent->header_page_overwrite,
5929 parse_header_field("data", &pevent->header_page_data_offset,
5930 &pevent->header_page_data_size, 1);
5935 static int event_matches(struct event_format *event,
5936 int id, const char *sys_name,
5937 const char *event_name)
5939 if (id >= 0 && id != event->id)
5942 if (event_name && (strcmp(event_name, event->name) != 0))
5945 if (sys_name && (strcmp(sys_name, event->system) != 0))
5951 static void free_handler(struct event_handler *handle)
5953 free((void *)handle->sys_name);
5954 free((void *)handle->event_name);
5958 static int find_event_handle(struct pevent *pevent, struct event_format *event)
5960 struct event_handler *handle, **next;
5962 for (next = &pevent->handlers; *next;
5963 next = &(*next)->next) {
5965 if (event_matches(event, handle->id,
5967 handle->event_name))
5974 pr_stat("overriding event (%d) %s:%s with new print handler",
5975 event->id, event->system, event->name);
5977 event->handler = handle->func;
5978 event->context = handle->context;
5980 *next = handle->next;
5981 free_handler(handle);
5987 * __pevent_parse_format - parse the event format
5988 * @buf: the buffer storing the event format string
5989 * @size: the size of @buf
5990 * @sys: the system the event belongs to
5992 * This parses the event format and creates an event structure
5993 * to quickly parse raw data for a given event.
5995 * These files currently come from:
5997 * /sys/kernel/debug/tracing/events/.../.../format
5999 enum pevent_errno __pevent_parse_format(struct event_format **eventp,
6000 struct pevent *pevent, const char *buf,
6001 unsigned long size, const char *sys)
6003 struct event_format *event;
6006 init_input_buf(buf, size);
6008 *eventp = event = alloc_event();
6010 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6012 event->name = event_read_name();
6015 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6016 goto event_alloc_failed;
6019 if (strcmp(sys, "ftrace") == 0) {
6020 event->flags |= EVENT_FL_ISFTRACE;
6022 if (strcmp(event->name, "bprint") == 0)
6023 event->flags |= EVENT_FL_ISBPRINT;
6026 event->id = event_read_id();
6027 if (event->id < 0) {
6028 ret = PEVENT_ERRNO__READ_ID_FAILED;
6030 * This isn't an allocation error actually.
6031 * But as the ID is critical, just bail out.
6033 goto event_alloc_failed;
6036 event->system = strdup(sys);
6037 if (!event->system) {
6038 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6039 goto event_alloc_failed;
6042 /* Add pevent to event so that it can be referenced */
6043 event->pevent = pevent;
6045 ret = event_read_format(event);
6047 ret = PEVENT_ERRNO__READ_FORMAT_FAILED;
6048 goto event_parse_failed;
6052 * If the event has an override, don't print warnings if the event
6053 * print format fails to parse.
6055 if (pevent && find_event_handle(pevent, event))
6058 ret = event_read_print(event);
6062 ret = PEVENT_ERRNO__READ_PRINT_FAILED;
6063 goto event_parse_failed;
6066 if (!ret && (event->flags & EVENT_FL_ISFTRACE)) {
6067 struct format_field *field;
6068 struct print_arg *arg, **list;
6070 /* old ftrace had no args */
6071 list = &event->print_fmt.args;
6072 for (field = event->format.fields; field; field = field->next) {
6075 event->flags |= EVENT_FL_FAILED;
6076 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6078 arg->type = PRINT_FIELD;
6079 arg->field.name = strdup(field->name);
6080 if (!arg->field.name) {
6081 event->flags |= EVENT_FL_FAILED;
6083 return PEVENT_ERRNO__OLD_FTRACE_ARG_FAILED;
6085 arg->field.field = field;
6095 event->flags |= EVENT_FL_FAILED;
6099 free(event->system);
6106 static enum pevent_errno
6107 __pevent_parse_event(struct pevent *pevent,
6108 struct event_format **eventp,
6109 const char *buf, unsigned long size,
6112 int ret = __pevent_parse_format(eventp, pevent, buf, size, sys);
6113 struct event_format *event = *eventp;
6118 if (pevent && add_event(pevent, event)) {
6119 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6120 goto event_add_failed;
6123 #define PRINT_ARGS 0
6124 if (PRINT_ARGS && event->print_fmt.args)
6125 print_args(event->print_fmt.args);
6130 pevent_free_format(event);
6135 * pevent_parse_format - parse the event format
6136 * @pevent: the handle to the pevent
6137 * @eventp: returned format
6138 * @buf: the buffer storing the event format string
6139 * @size: the size of @buf
6140 * @sys: the system the event belongs to
6142 * This parses the event format and creates an event structure
6143 * to quickly parse raw data for a given event.
6145 * These files currently come from:
6147 * /sys/kernel/debug/tracing/events/.../.../format
6149 enum pevent_errno pevent_parse_format(struct pevent *pevent,
6150 struct event_format **eventp,
6152 unsigned long size, const char *sys)
6154 return __pevent_parse_event(pevent, eventp, buf, size, sys);
6158 * pevent_parse_event - parse the event format
6159 * @pevent: the handle to the pevent
6160 * @buf: the buffer storing the event format string
6161 * @size: the size of @buf
6162 * @sys: the system the event belongs to
6164 * This parses the event format and creates an event structure
6165 * to quickly parse raw data for a given event.
6167 * These files currently come from:
6169 * /sys/kernel/debug/tracing/events/.../.../format
6171 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
6172 unsigned long size, const char *sys)
6174 struct event_format *event = NULL;
6175 return __pevent_parse_event(pevent, &event, buf, size, sys);
6179 #define _PE(code, str) str
6180 static const char * const pevent_error_str[] = {
6185 int pevent_strerror(struct pevent *pevent __maybe_unused,
6186 enum pevent_errno errnum, char *buf, size_t buflen)
6192 str_error_r(errnum, buf, buflen);
6196 if (errnum <= __PEVENT_ERRNO__START ||
6197 errnum >= __PEVENT_ERRNO__END)
6200 idx = errnum - __PEVENT_ERRNO__START - 1;
6201 msg = pevent_error_str[idx];
6202 snprintf(buf, buflen, "%s", msg);
6207 int get_field_val(struct trace_seq *s, struct format_field *field,
6208 const char *name, struct pevent_record *record,
6209 unsigned long long *val, int err)
6213 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6217 if (pevent_read_number_field(field, record->data, val)) {
6219 trace_seq_printf(s, " %s=INVALID", name);
6227 * pevent_get_field_raw - return the raw pointer into the data field
6228 * @s: The seq to print to on error
6229 * @event: the event that the field is for
6230 * @name: The name of the field
6231 * @record: The record with the field name.
6232 * @len: place to store the field length.
6233 * @err: print default error if failed.
6235 * Returns a pointer into record->data of the field and places
6236 * the length of the field in @len.
6238 * On failure, it returns NULL.
6240 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
6241 const char *name, struct pevent_record *record,
6244 struct format_field *field;
6245 void *data = record->data;
6252 field = pevent_find_field(event, name);
6256 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6260 /* Allow @len to be NULL */
6264 offset = field->offset;
6265 if (field->flags & FIELD_IS_DYNAMIC) {
6266 offset = pevent_read_number(event->pevent,
6267 data + offset, field->size);
6268 *len = offset >> 16;
6273 return data + offset;
6277 * pevent_get_field_val - find a field and return its value
6278 * @s: The seq to print to on error
6279 * @event: the event that the field is for
6280 * @name: The name of the field
6281 * @record: The record with the field name.
6282 * @val: place to store the value of the field.
6283 * @err: print default error if failed.
6285 * Returns 0 on success -1 on field not found.
6287 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
6288 const char *name, struct pevent_record *record,
6289 unsigned long long *val, int err)
6291 struct format_field *field;
6296 field = pevent_find_field(event, name);
6298 return get_field_val(s, field, name, record, val, err);
6302 * pevent_get_common_field_val - find a common field and return its value
6303 * @s: The seq to print to on error
6304 * @event: the event that the field is for
6305 * @name: The name of the field
6306 * @record: The record with the field name.
6307 * @val: place to store the value of the field.
6308 * @err: print default error if failed.
6310 * Returns 0 on success -1 on field not found.
6312 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
6313 const char *name, struct pevent_record *record,
6314 unsigned long long *val, int err)
6316 struct format_field *field;
6321 field = pevent_find_common_field(event, name);
6323 return get_field_val(s, field, name, record, val, err);
6327 * pevent_get_any_field_val - find a any field and return its value
6328 * @s: The seq to print to on error
6329 * @event: the event that the field is for
6330 * @name: The name of the field
6331 * @record: The record with the field name.
6332 * @val: place to store the value of the field.
6333 * @err: print default error if failed.
6335 * Returns 0 on success -1 on field not found.
6337 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
6338 const char *name, struct pevent_record *record,
6339 unsigned long long *val, int err)
6341 struct format_field *field;
6346 field = pevent_find_any_field(event, name);
6348 return get_field_val(s, field, name, record, val, err);
6352 * pevent_print_num_field - print a field and a format
6353 * @s: The seq to print to
6354 * @fmt: The printf format to print the field with.
6355 * @event: the event that the field is for
6356 * @name: The name of the field
6357 * @record: The record with the field name.
6358 * @err: print default error if failed.
6360 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6362 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
6363 struct event_format *event, const char *name,
6364 struct pevent_record *record, int err)
6366 struct format_field *field = pevent_find_field(event, name);
6367 unsigned long long val;
6372 if (pevent_read_number_field(field, record->data, &val))
6375 return trace_seq_printf(s, fmt, val);
6379 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6384 * pevent_print_func_field - print a field and a format for function pointers
6385 * @s: The seq to print to
6386 * @fmt: The printf format to print the field with.
6387 * @event: the event that the field is for
6388 * @name: The name of the field
6389 * @record: The record with the field name.
6390 * @err: print default error if failed.
6392 * Returns: 0 on success, -1 field not found, or 1 if buffer is full.
6394 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
6395 struct event_format *event, const char *name,
6396 struct pevent_record *record, int err)
6398 struct format_field *field = pevent_find_field(event, name);
6399 struct pevent *pevent = event->pevent;
6400 unsigned long long val;
6401 struct func_map *func;
6407 if (pevent_read_number_field(field, record->data, &val))
6410 func = find_func(pevent, val);
6413 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6415 sprintf(tmp, "0x%08llx", val);
6417 return trace_seq_printf(s, fmt, tmp);
6421 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6425 static void free_func_handle(struct pevent_function_handler *func)
6427 struct pevent_func_params *params;
6431 while (func->params) {
6432 params = func->params;
6433 func->params = params->next;
6441 * pevent_register_print_function - register a helper function
6442 * @pevent: the handle to the pevent
6443 * @func: the function to process the helper function
6444 * @ret_type: the return type of the helper function
6445 * @name: the name of the helper function
6446 * @parameters: A list of enum pevent_func_arg_type
6448 * Some events may have helper functions in the print format arguments.
6449 * This allows a plugin to dynamically create a way to process one
6450 * of these functions.
6452 * The @parameters is a variable list of pevent_func_arg_type enums that
6453 * must end with PEVENT_FUNC_ARG_VOID.
6455 int pevent_register_print_function(struct pevent *pevent,
6456 pevent_func_handler func,
6457 enum pevent_func_arg_type ret_type,
6460 struct pevent_function_handler *func_handle;
6461 struct pevent_func_params **next_param;
6462 struct pevent_func_params *param;
6463 enum pevent_func_arg_type type;
6467 func_handle = find_func_handler(pevent, name);
6470 * This is most like caused by the users own
6471 * plugins updating the function. This overrides the
6474 pr_stat("override of function helper '%s'", name);
6475 remove_func_handler(pevent, name);
6478 func_handle = calloc(1, sizeof(*func_handle));
6480 do_warning("Failed to allocate function handler");
6481 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6484 func_handle->ret_type = ret_type;
6485 func_handle->name = strdup(name);
6486 func_handle->func = func;
6487 if (!func_handle->name) {
6488 do_warning("Failed to allocate function name");
6490 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6493 next_param = &(func_handle->params);
6496 type = va_arg(ap, enum pevent_func_arg_type);
6497 if (type == PEVENT_FUNC_ARG_VOID)
6500 if (type >= PEVENT_FUNC_ARG_MAX_TYPES) {
6501 do_warning("Invalid argument type %d", type);
6502 ret = PEVENT_ERRNO__INVALID_ARG_TYPE;
6506 param = malloc(sizeof(*param));
6508 do_warning("Failed to allocate function param");
6509 ret = PEVENT_ERRNO__MEM_ALLOC_FAILED;
6515 *next_param = param;
6516 next_param = &(param->next);
6518 func_handle->nr_args++;
6522 func_handle->next = pevent->func_handlers;
6523 pevent->func_handlers = func_handle;
6528 free_func_handle(func_handle);
6533 * pevent_unregister_print_function - unregister a helper function
6534 * @pevent: the handle to the pevent
6535 * @func: the function to process the helper function
6536 * @name: the name of the helper function
6538 * This function removes existing print handler for function @name.
6540 * Returns 0 if the handler was removed successully, -1 otherwise.
6542 int pevent_unregister_print_function(struct pevent *pevent,
6543 pevent_func_handler func, char *name)
6545 struct pevent_function_handler *func_handle;
6547 func_handle = find_func_handler(pevent, name);
6548 if (func_handle && func_handle->func == func) {
6549 remove_func_handler(pevent, name);
6555 static struct event_format *pevent_search_event(struct pevent *pevent, int id,
6556 const char *sys_name,
6557 const char *event_name)
6559 struct event_format *event;
6563 event = pevent_find_event(pevent, id);
6566 if (event_name && (strcmp(event_name, event->name) != 0))
6568 if (sys_name && (strcmp(sys_name, event->system) != 0))
6571 event = pevent_find_event_by_name(pevent, sys_name, event_name);
6579 * pevent_register_event_handler - register a way to parse an event
6580 * @pevent: the handle to the pevent
6581 * @id: the id of the event to register
6582 * @sys_name: the system name the event belongs to
6583 * @event_name: the name of the event
6584 * @func: the function to call to parse the event information
6585 * @context: the data to be passed to @func
6587 * This function allows a developer to override the parsing of
6588 * a given event. If for some reason the default print format
6589 * is not sufficient, this function will register a function
6590 * for an event to be used to parse the data instead.
6592 * If @id is >= 0, then it is used to find the event.
6593 * else @sys_name and @event_name are used.
6595 int pevent_register_event_handler(struct pevent *pevent, int id,
6596 const char *sys_name, const char *event_name,
6597 pevent_event_handler_func func, void *context)
6599 struct event_format *event;
6600 struct event_handler *handle;
6602 event = pevent_search_event(pevent, id, sys_name, event_name);
6606 pr_stat("overriding event (%d) %s:%s with new print handler",
6607 event->id, event->system, event->name);
6609 event->handler = func;
6610 event->context = context;
6614 /* Save for later use. */
6615 handle = calloc(1, sizeof(*handle));
6617 do_warning("Failed to allocate event handler");
6618 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6623 handle->event_name = strdup(event_name);
6625 handle->sys_name = strdup(sys_name);
6627 if ((event_name && !handle->event_name) ||
6628 (sys_name && !handle->sys_name)) {
6629 do_warning("Failed to allocate event/sys name");
6630 free((void *)handle->event_name);
6631 free((void *)handle->sys_name);
6633 return PEVENT_ERRNO__MEM_ALLOC_FAILED;
6636 handle->func = func;
6637 handle->next = pevent->handlers;
6638 pevent->handlers = handle;
6639 handle->context = context;
6644 static int handle_matches(struct event_handler *handler, int id,
6645 const char *sys_name, const char *event_name,
6646 pevent_event_handler_func func, void *context)
6648 if (id >= 0 && id != handler->id)
6651 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6654 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6657 if (func != handler->func || context != handler->context)
6664 * pevent_unregister_event_handler - unregister an existing event handler
6665 * @pevent: the handle to the pevent
6666 * @id: the id of the event to unregister
6667 * @sys_name: the system name the handler belongs to
6668 * @event_name: the name of the event handler
6669 * @func: the function to call to parse the event information
6670 * @context: the data to be passed to @func
6672 * This function removes existing event handler (parser).
6674 * If @id is >= 0, then it is used to find the event.
6675 * else @sys_name and @event_name are used.
6677 * Returns 0 if handler was removed successfully, -1 if event was not found.
6679 int pevent_unregister_event_handler(struct pevent *pevent, int id,
6680 const char *sys_name, const char *event_name,
6681 pevent_event_handler_func func, void *context)
6683 struct event_format *event;
6684 struct event_handler *handle;
6685 struct event_handler **next;
6687 event = pevent_search_event(pevent, id, sys_name, event_name);
6691 if (event->handler == func && event->context == context) {
6692 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6693 event->id, event->system, event->name);
6695 event->handler = NULL;
6696 event->context = NULL;
6701 for (next = &pevent->handlers; *next; next = &(*next)->next) {
6703 if (handle_matches(handle, id, sys_name, event_name,
6711 *next = handle->next;
6712 free_handler(handle);
6718 * pevent_alloc - create a pevent handle
6720 struct pevent *pevent_alloc(void)
6722 struct pevent *pevent = calloc(1, sizeof(*pevent));
6725 pevent->ref_count = 1;
6730 void pevent_ref(struct pevent *pevent)
6732 pevent->ref_count++;
6735 void pevent_free_format_field(struct format_field *field)
6738 if (field->alias != field->name)
6744 static void free_format_fields(struct format_field *field)
6746 struct format_field *next;
6750 pevent_free_format_field(field);
6755 static void free_formats(struct format *format)
6757 free_format_fields(format->common_fields);
6758 free_format_fields(format->fields);
6761 void pevent_free_format(struct event_format *event)
6764 free(event->system);
6766 free_formats(&event->format);
6768 free(event->print_fmt.format);
6769 free_args(event->print_fmt.args);
6775 * pevent_free - free a pevent handle
6776 * @pevent: the pevent handle to free
6778 void pevent_free(struct pevent *pevent)
6780 struct cmdline_list *cmdlist, *cmdnext;
6781 struct func_list *funclist, *funcnext;
6782 struct printk_list *printklist, *printknext;
6783 struct pevent_function_handler *func_handler;
6784 struct event_handler *handle;
6790 cmdlist = pevent->cmdlist;
6791 funclist = pevent->funclist;
6792 printklist = pevent->printklist;
6794 pevent->ref_count--;
6795 if (pevent->ref_count)
6798 if (pevent->cmdlines) {
6799 for (i = 0; i < pevent->cmdline_count; i++)
6800 free(pevent->cmdlines[i].comm);
6801 free(pevent->cmdlines);
6805 cmdnext = cmdlist->next;
6806 free(cmdlist->comm);
6811 if (pevent->func_map) {
6812 for (i = 0; i < (int)pevent->func_count; i++) {
6813 free(pevent->func_map[i].func);
6814 free(pevent->func_map[i].mod);
6816 free(pevent->func_map);
6820 funcnext = funclist->next;
6821 free(funclist->func);
6822 free(funclist->mod);
6824 funclist = funcnext;
6827 while (pevent->func_handlers) {
6828 func_handler = pevent->func_handlers;
6829 pevent->func_handlers = func_handler->next;
6830 free_func_handle(func_handler);
6833 if (pevent->printk_map) {
6834 for (i = 0; i < (int)pevent->printk_count; i++)
6835 free(pevent->printk_map[i].printk);
6836 free(pevent->printk_map);
6839 while (printklist) {
6840 printknext = printklist->next;
6841 free(printklist->printk);
6843 printklist = printknext;
6846 for (i = 0; i < pevent->nr_events; i++)
6847 pevent_free_format(pevent->events[i]);
6849 while (pevent->handlers) {
6850 handle = pevent->handlers;
6851 pevent->handlers = handle->next;
6852 free_handler(handle);
6855 free(pevent->trace_clock);
6856 free(pevent->events);
6857 free(pevent->sort_events);
6858 free(pevent->func_resolver);
6863 void pevent_unref(struct pevent *pevent)
6865 pevent_free(pevent);