1 // SPDX-License-Identifier: LGPL-2.1
3 * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
6 * The parts for function graph printing was taken and modified from the
7 * Linux Kernel that were written by
8 * - Copyright (C) 2009 Frederic Weisbecker,
9 * Frederic Weisbecker gave his permission to relicense the code to
10 * the Lesser General Public License.
21 #include <linux/time64.h>
23 #include <netinet/in.h>
24 #include "event-parse.h"
26 #include "event-parse-local.h"
27 #include "event-utils.h"
28 #include "trace-seq.h"
30 static const char *input_buf;
31 static unsigned long long input_buf_ptr;
32 static unsigned long long input_buf_siz;
34 static int is_flag_field;
35 static int is_symbolic_field;
37 static int show_warning = 1;
39 #define do_warning(fmt, ...) \
42 warning(fmt, ##__VA_ARGS__); \
45 #define do_warning_event(event, fmt, ...) \
51 warning("[%s:%s] " fmt, event->system, \
52 event->name, ##__VA_ARGS__); \
54 warning(fmt, ##__VA_ARGS__); \
57 static void init_input_buf(const char *buf, unsigned long long size)
64 const char *tep_get_input_buf(void)
69 unsigned long long tep_get_input_buf_ptr(void)
74 struct event_handler {
75 struct event_handler *next;
78 const char *event_name;
79 tep_event_handler_func func;
84 struct func_params *next;
85 enum tep_func_arg_type type;
88 struct tep_function_handler {
89 struct tep_function_handler *next;
90 enum tep_func_arg_type ret_type;
92 tep_func_handler func;
93 struct func_params *params;
97 static unsigned long long
98 process_defined_func(struct trace_seq *s, void *data, int size,
99 struct tep_event *event, struct tep_print_arg *arg);
101 static void free_func_handle(struct tep_function_handler *func);
104 * tep_buffer_init - init buffer for parsing
105 * @buf: buffer to parse
106 * @size: the size of the buffer
108 * For use with tep_read_token(), this initializes the internal
109 * buffer that tep_read_token() will parse.
111 void tep_buffer_init(const char *buf, unsigned long long size)
113 init_input_buf(buf, size);
116 void breakpoint(void)
122 struct tep_print_arg *alloc_arg(void)
124 return calloc(1, sizeof(struct tep_print_arg));
132 static int cmdline_cmp(const void *a, const void *b)
134 const struct tep_cmdline *ca = a;
135 const struct tep_cmdline *cb = b;
137 if (ca->pid < cb->pid)
139 if (ca->pid > cb->pid)
145 /* Looking for where to place the key */
146 static int cmdline_slot_cmp(const void *a, const void *b)
148 const struct tep_cmdline *ca = a;
149 const struct tep_cmdline *cb = b;
150 const struct tep_cmdline *cb1 = cb + 1;
152 if (ca->pid < cb->pid)
155 if (ca->pid > cb->pid) {
156 if (ca->pid <= cb1->pid)
164 struct cmdline_list {
165 struct cmdline_list *next;
170 static int cmdline_init(struct tep_handle *tep)
172 struct cmdline_list *cmdlist = tep->cmdlist;
173 struct cmdline_list *item;
174 struct tep_cmdline *cmdlines;
177 cmdlines = malloc(sizeof(*cmdlines) * tep->cmdline_count);
183 cmdlines[i].pid = cmdlist->pid;
184 cmdlines[i].comm = cmdlist->comm;
187 cmdlist = cmdlist->next;
191 qsort(cmdlines, tep->cmdline_count, sizeof(*cmdlines), cmdline_cmp);
193 tep->cmdlines = cmdlines;
199 static const char *find_cmdline(struct tep_handle *tep, int pid)
201 const struct tep_cmdline *comm;
202 struct tep_cmdline key;
207 if (!tep->cmdlines && cmdline_init(tep))
208 return "<not enough memory for cmdlines!>";
212 comm = bsearch(&key, tep->cmdlines, tep->cmdline_count,
213 sizeof(*tep->cmdlines), cmdline_cmp);
221 * tep_is_pid_registered - return if a pid has a cmdline registered
222 * @tep: a handle to the trace event parser context
223 * @pid: The pid to check if it has a cmdline registered with.
225 * Returns true if the pid has a cmdline mapped to it
228 bool tep_is_pid_registered(struct tep_handle *tep, int pid)
230 const struct tep_cmdline *comm;
231 struct tep_cmdline key;
236 if (!tep->cmdlines && cmdline_init(tep))
241 comm = bsearch(&key, tep->cmdlines, tep->cmdline_count,
242 sizeof(*tep->cmdlines), cmdline_cmp);
250 * If the command lines have been converted to an array, then
251 * we must add this pid. This is much slower than when cmdlines
252 * are added before the array is initialized.
254 static int add_new_comm(struct tep_handle *tep,
255 const char *comm, int pid, bool override)
257 struct tep_cmdline *cmdlines = tep->cmdlines;
258 struct tep_cmdline *cmdline;
259 struct tep_cmdline key;
266 /* avoid duplicates */
269 cmdline = bsearch(&key, tep->cmdlines, tep->cmdline_count,
270 sizeof(*tep->cmdlines), cmdline_cmp);
276 new_comm = strdup(comm);
282 cmdline->comm = new_comm;
287 cmdlines = realloc(cmdlines, sizeof(*cmdlines) * (tep->cmdline_count + 1));
292 tep->cmdlines = cmdlines;
294 key.comm = strdup(comm);
300 if (!tep->cmdline_count) {
302 tep->cmdlines[0] = key;
303 tep->cmdline_count++;
307 /* Now find where we want to store the new cmdline */
308 cmdline = bsearch(&key, tep->cmdlines, tep->cmdline_count - 1,
309 sizeof(*tep->cmdlines), cmdline_slot_cmp);
311 cnt = tep->cmdline_count;
313 /* cmdline points to the one before the spot we want */
315 cnt -= cmdline - tep->cmdlines;
318 /* The new entry is either before or after the list */
319 if (key.pid > tep->cmdlines[tep->cmdline_count - 1].pid) {
320 tep->cmdlines[tep->cmdline_count++] = key;
323 cmdline = &tep->cmdlines[0];
325 memmove(cmdline + 1, cmdline, (cnt * sizeof(*cmdline)));
328 tep->cmdline_count++;
333 static int _tep_register_comm(struct tep_handle *tep,
334 const char *comm, int pid, bool override)
336 struct cmdline_list *item;
339 return add_new_comm(tep, comm, pid, override);
341 item = malloc(sizeof(*item));
346 item->comm = strdup(comm);
348 item->comm = strdup("<...>");
354 item->next = tep->cmdlist;
357 tep->cmdline_count++;
363 * tep_register_comm - register a pid / comm mapping
364 * @tep: a handle to the trace event parser context
365 * @comm: the command line to register
366 * @pid: the pid to map the command line to
368 * This adds a mapping to search for command line names with
369 * a given pid. The comm is duplicated. If a command with the same pid
370 * already exist, -1 is returned and errno is set to EEXIST
372 int tep_register_comm(struct tep_handle *tep, const char *comm, int pid)
374 return _tep_register_comm(tep, comm, pid, false);
378 * tep_override_comm - register a pid / comm mapping
379 * @tep: a handle to the trace event parser context
380 * @comm: the command line to register
381 * @pid: the pid to map the command line to
383 * This adds a mapping to search for command line names with
384 * a given pid. The comm is duplicated. If a command with the same pid
385 * already exist, the command string is udapted with the new one
387 int tep_override_comm(struct tep_handle *tep, const char *comm, int pid)
389 if (!tep->cmdlines && cmdline_init(tep)) {
393 return _tep_register_comm(tep, comm, pid, true);
397 unsigned long long addr;
403 struct func_list *next;
404 unsigned long long addr;
409 static int func_cmp(const void *a, const void *b)
411 const struct func_map *fa = a;
412 const struct func_map *fb = b;
414 if (fa->addr < fb->addr)
416 if (fa->addr > fb->addr)
423 * We are searching for a record in between, not an exact
426 static int func_bcmp(const void *a, const void *b)
428 const struct func_map *fa = a;
429 const struct func_map *fb = b;
431 if ((fa->addr == fb->addr) ||
433 (fa->addr > fb->addr &&
434 fa->addr < (fb+1)->addr))
437 if (fa->addr < fb->addr)
443 static int func_map_init(struct tep_handle *tep)
445 struct func_list *funclist;
446 struct func_list *item;
447 struct func_map *func_map;
450 func_map = malloc(sizeof(*func_map) * (tep->func_count + 1));
454 funclist = tep->funclist;
458 func_map[i].func = funclist->func;
459 func_map[i].addr = funclist->addr;
460 func_map[i].mod = funclist->mod;
463 funclist = funclist->next;
467 qsort(func_map, tep->func_count, sizeof(*func_map), func_cmp);
470 * Add a special record at the end.
472 func_map[tep->func_count].func = NULL;
473 func_map[tep->func_count].addr = 0;
474 func_map[tep->func_count].mod = NULL;
476 tep->func_map = func_map;
477 tep->funclist = NULL;
482 static struct func_map *
483 __find_func(struct tep_handle *tep, unsigned long long addr)
485 struct func_map *func;
493 func = bsearch(&key, tep->func_map, tep->func_count,
494 sizeof(*tep->func_map), func_bcmp);
499 struct func_resolver {
500 tep_func_resolver_t *func;
506 * tep_set_function_resolver - set an alternative function resolver
507 * @tep: a handle to the trace event parser context
508 * @resolver: function to be used
509 * @priv: resolver function private state.
511 * Some tools may have already a way to resolve kernel functions, allow them to
512 * keep using it instead of duplicating all the entries inside tep->funclist.
514 int tep_set_function_resolver(struct tep_handle *tep,
515 tep_func_resolver_t *func, void *priv)
517 struct func_resolver *resolver = malloc(sizeof(*resolver));
519 if (resolver == NULL)
522 resolver->func = func;
523 resolver->priv = priv;
525 free(tep->func_resolver);
526 tep->func_resolver = resolver;
532 * tep_reset_function_resolver - reset alternative function resolver
533 * @tep: a handle to the trace event parser context
535 * Stop using whatever alternative resolver was set, use the default
538 void tep_reset_function_resolver(struct tep_handle *tep)
540 free(tep->func_resolver);
541 tep->func_resolver = NULL;
544 static struct func_map *
545 find_func(struct tep_handle *tep, unsigned long long addr)
547 struct func_map *map;
549 if (!tep->func_resolver)
550 return __find_func(tep, addr);
552 map = &tep->func_resolver->map;
555 map->func = tep->func_resolver->func(tep->func_resolver->priv,
556 &map->addr, &map->mod);
557 if (map->func == NULL)
564 * tep_find_function - find a function by a given address
565 * @tep: a handle to the trace event parser context
566 * @addr: the address to find the function with
568 * Returns a pointer to the function stored that has the given
569 * address. Note, the address does not have to be exact, it
570 * will select the function that would contain the address.
572 const char *tep_find_function(struct tep_handle *tep, unsigned long long addr)
574 struct func_map *map;
576 map = find_func(tep, addr);
584 * tep_find_function_address - find a function address by a given address
585 * @tep: a handle to the trace event parser context
586 * @addr: the address to find the function with
588 * Returns the address the function starts at. This can be used in
589 * conjunction with tep_find_function to print both the function
590 * name and the function offset.
593 tep_find_function_address(struct tep_handle *tep, unsigned long long addr)
595 struct func_map *map;
597 map = find_func(tep, addr);
605 * tep_register_function - register a function with a given address
606 * @tep: a handle to the trace event parser context
607 * @function: the function name to register
608 * @addr: the address the function starts at
609 * @mod: the kernel module the function may be in (NULL for none)
611 * This registers a function name with an address and module.
612 * The @func passed in is duplicated.
614 int tep_register_function(struct tep_handle *tep, char *func,
615 unsigned long long addr, char *mod)
617 struct func_list *item = malloc(sizeof(*item));
622 item->next = tep->funclist;
623 item->func = strdup(func);
628 item->mod = strdup(mod);
635 tep->funclist = item;
650 * tep_print_funcs - print out the stored functions
651 * @tep: a handle to the trace event parser context
653 * This prints out the stored functions.
655 void tep_print_funcs(struct tep_handle *tep)
662 for (i = 0; i < (int)tep->func_count; i++) {
664 tep->func_map[i].addr,
665 tep->func_map[i].func);
666 if (tep->func_map[i].mod)
667 printf(" [%s]\n", tep->func_map[i].mod);
674 unsigned long long addr;
679 struct printk_list *next;
680 unsigned long long addr;
684 static int printk_cmp(const void *a, const void *b)
686 const struct printk_map *pa = a;
687 const struct printk_map *pb = b;
689 if (pa->addr < pb->addr)
691 if (pa->addr > pb->addr)
697 static int printk_map_init(struct tep_handle *tep)
699 struct printk_list *printklist;
700 struct printk_list *item;
701 struct printk_map *printk_map;
704 printk_map = malloc(sizeof(*printk_map) * (tep->printk_count + 1));
708 printklist = tep->printklist;
712 printk_map[i].printk = printklist->printk;
713 printk_map[i].addr = printklist->addr;
716 printklist = printklist->next;
720 qsort(printk_map, tep->printk_count, sizeof(*printk_map), printk_cmp);
722 tep->printk_map = printk_map;
723 tep->printklist = NULL;
728 static struct printk_map *
729 find_printk(struct tep_handle *tep, unsigned long long addr)
731 struct printk_map *printk;
732 struct printk_map key;
734 if (!tep->printk_map && printk_map_init(tep))
739 printk = bsearch(&key, tep->printk_map, tep->printk_count,
740 sizeof(*tep->printk_map), printk_cmp);
746 * tep_register_print_string - register a string by its address
747 * @tep: a handle to the trace event parser context
748 * @fmt: the string format to register
749 * @addr: the address the string was located at
751 * This registers a string by the address it was stored in the kernel.
752 * The @fmt passed in is duplicated.
754 int tep_register_print_string(struct tep_handle *tep, const char *fmt,
755 unsigned long long addr)
757 struct printk_list *item = malloc(sizeof(*item));
763 item->next = tep->printklist;
766 /* Strip off quotes and '\n' from the end */
769 item->printk = strdup(fmt);
773 p = item->printk + strlen(item->printk) - 1;
778 if (strcmp(p, "\\n") == 0)
781 tep->printklist = item;
793 * tep_print_printk - print out the stored strings
794 * @tep: a handle to the trace event parser context
796 * This prints the string formats that were stored.
798 void tep_print_printk(struct tep_handle *tep)
802 if (!tep->printk_map)
803 printk_map_init(tep);
805 for (i = 0; i < (int)tep->printk_count; i++) {
806 printf("%016llx %s\n",
807 tep->printk_map[i].addr,
808 tep->printk_map[i].printk);
812 static struct tep_event *alloc_event(void)
814 return calloc(1, sizeof(struct tep_event));
817 static int add_event(struct tep_handle *tep, struct tep_event *event)
820 struct tep_event **events = realloc(tep->events, sizeof(event) *
821 (tep->nr_events + 1));
825 tep->events = events;
827 for (i = 0; i < tep->nr_events; i++) {
828 if (tep->events[i]->id > event->id)
831 if (i < tep->nr_events)
832 memmove(&tep->events[i + 1],
834 sizeof(event) * (tep->nr_events - i));
836 tep->events[i] = event;
844 static int event_item_type(enum tep_event_type type)
847 case TEP_EVENT_ITEM ... TEP_EVENT_SQUOTE:
849 case TEP_EVENT_ERROR ... TEP_EVENT_DELIM:
855 static void free_flag_sym(struct tep_print_flag_sym *fsym)
857 struct tep_print_flag_sym *next;
868 static void free_arg(struct tep_print_arg *arg)
870 struct tep_print_arg *farg;
877 free(arg->atom.atom);
879 case TEP_PRINT_FIELD:
880 free(arg->field.name);
882 case TEP_PRINT_FLAGS:
883 free_arg(arg->flags.field);
884 free(arg->flags.delim);
885 free_flag_sym(arg->flags.flags);
887 case TEP_PRINT_SYMBOL:
888 free_arg(arg->symbol.field);
889 free_flag_sym(arg->symbol.symbols);
892 case TEP_PRINT_HEX_STR:
893 free_arg(arg->hex.field);
894 free_arg(arg->hex.size);
896 case TEP_PRINT_INT_ARRAY:
897 free_arg(arg->int_array.field);
898 free_arg(arg->int_array.count);
899 free_arg(arg->int_array.el_size);
902 free(arg->typecast.type);
903 free_arg(arg->typecast.item);
905 case TEP_PRINT_STRING:
906 case TEP_PRINT_BSTRING:
907 free(arg->string.string);
909 case TEP_PRINT_BITMASK:
910 free(arg->bitmask.bitmask);
912 case TEP_PRINT_DYNAMIC_ARRAY:
913 case TEP_PRINT_DYNAMIC_ARRAY_LEN:
914 free(arg->dynarray.index);
918 free_arg(arg->op.left);
919 free_arg(arg->op.right);
922 while (arg->func.args) {
923 farg = arg->func.args;
924 arg->func.args = farg->next;
937 static enum tep_event_type get_type(int ch)
940 return TEP_EVENT_NEWLINE;
942 return TEP_EVENT_SPACE;
943 if (isalnum(ch) || ch == '_')
944 return TEP_EVENT_ITEM;
946 return TEP_EVENT_SQUOTE;
948 return TEP_EVENT_DQUOTE;
950 return TEP_EVENT_NONE;
951 if (ch == '(' || ch == ')' || ch == ',')
952 return TEP_EVENT_DELIM;
957 static int __read_char(void)
959 if (input_buf_ptr >= input_buf_siz)
962 return input_buf[input_buf_ptr++];
965 static int __peek_char(void)
967 if (input_buf_ptr >= input_buf_siz)
970 return input_buf[input_buf_ptr];
974 * tep_peek_char - peek at the next character that will be read
976 * Returns the next character read, or -1 if end of buffer.
978 int tep_peek_char(void)
980 return __peek_char();
983 static int extend_token(char **tok, char *buf, int size)
985 char *newtok = realloc(*tok, size);
1002 static enum tep_event_type force_token(const char *str, char **tok);
1004 static enum tep_event_type __read_token(char **tok)
1007 int ch, last_ch, quote_ch, next_ch;
1010 enum tep_event_type type;
1017 return TEP_EVENT_NONE;
1019 type = get_type(ch);
1020 if (type == TEP_EVENT_NONE)
1026 case TEP_EVENT_NEWLINE:
1027 case TEP_EVENT_DELIM:
1028 if (asprintf(tok, "%c", ch) < 0)
1029 return TEP_EVENT_ERROR;
1036 next_ch = __peek_char();
1037 if (next_ch == '>') {
1038 buf[i++] = __read_char();
1051 buf[i++] = __read_char();
1063 default: /* what should we do instead? */
1073 buf[i++] = __read_char();
1076 case TEP_EVENT_DQUOTE:
1077 case TEP_EVENT_SQUOTE:
1078 /* don't keep quotes */
1084 if (i == (BUFSIZ - 1)) {
1088 if (extend_token(tok, buf, tok_size) < 0)
1089 return TEP_EVENT_NONE;
1095 /* the '\' '\' will cancel itself */
1096 if (ch == '\\' && last_ch == '\\')
1098 } while (ch != quote_ch || last_ch == '\\');
1099 /* remove the last quote */
1103 * For strings (double quotes) check the next token.
1104 * If it is another string, concatinate the two.
1106 if (type == TEP_EVENT_DQUOTE) {
1107 unsigned long long save_input_buf_ptr = input_buf_ptr;
1111 } while (isspace(ch));
1114 input_buf_ptr = save_input_buf_ptr;
1119 case TEP_EVENT_ERROR ... TEP_EVENT_SPACE:
1120 case TEP_EVENT_ITEM:
1125 while (get_type(__peek_char()) == type) {
1126 if (i == (BUFSIZ - 1)) {
1130 if (extend_token(tok, buf, tok_size) < 0)
1131 return TEP_EVENT_NONE;
1140 if (extend_token(tok, buf, tok_size + i + 1) < 0)
1141 return TEP_EVENT_NONE;
1143 if (type == TEP_EVENT_ITEM) {
1145 * Older versions of the kernel has a bug that
1146 * creates invalid symbols and will break the mac80211
1147 * parsing. This is a work around to that bug.
1149 * See Linux kernel commit:
1150 * 811cb50baf63461ce0bdb234927046131fc7fa8b
1152 if (strcmp(*tok, "LOCAL_PR_FMT") == 0) {
1155 return force_token("\"%s\" ", tok);
1156 } else if (strcmp(*tok, "STA_PR_FMT") == 0) {
1159 return force_token("\" sta:%pM\" ", tok);
1160 } else if (strcmp(*tok, "VIF_PR_FMT") == 0) {
1163 return force_token("\" vif:%p(%d)\" ", tok);
1170 static enum tep_event_type force_token(const char *str, char **tok)
1172 const char *save_input_buf;
1173 unsigned long long save_input_buf_ptr;
1174 unsigned long long save_input_buf_siz;
1175 enum tep_event_type type;
1177 /* save off the current input pointers */
1178 save_input_buf = input_buf;
1179 save_input_buf_ptr = input_buf_ptr;
1180 save_input_buf_siz = input_buf_siz;
1182 init_input_buf(str, strlen(str));
1184 type = __read_token(tok);
1186 /* reset back to original token */
1187 input_buf = save_input_buf;
1188 input_buf_ptr = save_input_buf_ptr;
1189 input_buf_siz = save_input_buf_siz;
1194 static void free_token(char *tok)
1200 static enum tep_event_type read_token(char **tok)
1202 enum tep_event_type type;
1205 type = __read_token(tok);
1206 if (type != TEP_EVENT_SPACE)
1214 return TEP_EVENT_NONE;
1218 * tep_read_token - access to utilities to use the tep parser
1219 * @tok: The token to return
1221 * This will parse tokens from the string given by
1224 * Returns the token type.
1226 enum tep_event_type tep_read_token(char **tok)
1228 return read_token(tok);
1232 * tep_free_token - free a token returned by tep_read_token
1233 * @token: the token to free
1235 void tep_free_token(char *token)
1241 static enum tep_event_type read_token_item(char **tok)
1243 enum tep_event_type type;
1246 type = __read_token(tok);
1247 if (type != TEP_EVENT_SPACE && type != TEP_EVENT_NEWLINE)
1255 return TEP_EVENT_NONE;
1258 static int test_type(enum tep_event_type type, enum tep_event_type expect)
1260 if (type != expect) {
1261 do_warning("Error: expected type %d but read %d",
1268 static int test_type_token(enum tep_event_type type, const char *token,
1269 enum tep_event_type expect, const char *expect_tok)
1271 if (type != expect) {
1272 do_warning("Error: expected type %d but read %d",
1277 if (strcmp(token, expect_tok) != 0) {
1278 do_warning("Error: expected '%s' but read '%s'",
1285 static int __read_expect_type(enum tep_event_type expect, char **tok, int newline_ok)
1287 enum tep_event_type type;
1290 type = read_token(tok);
1292 type = read_token_item(tok);
1293 return test_type(type, expect);
1296 static int read_expect_type(enum tep_event_type expect, char **tok)
1298 return __read_expect_type(expect, tok, 1);
1301 static int __read_expected(enum tep_event_type expect, const char *str,
1304 enum tep_event_type type;
1309 type = read_token(&token);
1311 type = read_token_item(&token);
1313 ret = test_type_token(type, token, expect, str);
1320 static int read_expected(enum tep_event_type expect, const char *str)
1322 return __read_expected(expect, str, 1);
1325 static int read_expected_item(enum tep_event_type expect, const char *str)
1327 return __read_expected(expect, str, 0);
1330 static char *event_read_name(void)
1334 if (read_expected(TEP_EVENT_ITEM, "name") < 0)
1337 if (read_expected(TEP_EVENT_OP, ":") < 0)
1340 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
1350 static int event_read_id(void)
1355 if (read_expected_item(TEP_EVENT_ITEM, "ID") < 0)
1358 if (read_expected(TEP_EVENT_OP, ":") < 0)
1361 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
1364 id = strtoul(token, NULL, 0);
1373 static int field_is_string(struct tep_format_field *field)
1375 if ((field->flags & TEP_FIELD_IS_ARRAY) &&
1376 (strstr(field->type, "char") || strstr(field->type, "u8") ||
1377 strstr(field->type, "s8")))
1383 static int field_is_dynamic(struct tep_format_field *field)
1385 if (strncmp(field->type, "__data_loc", 10) == 0)
1391 static int field_is_long(struct tep_format_field *field)
1393 /* includes long long */
1394 if (strstr(field->type, "long"))
1400 static unsigned int type_size(const char *name)
1402 /* This covers all TEP_FIELD_IS_STRING types. */
1420 for (i = 0; table[i].type; i++) {
1421 if (!strcmp(table[i].type, name))
1422 return table[i].size;
1428 static int event_read_fields(struct tep_event *event, struct tep_format_field **fields)
1430 struct tep_format_field *field = NULL;
1431 enum tep_event_type type;
1437 unsigned int size_dynamic = 0;
1439 type = read_token(&token);
1440 if (type == TEP_EVENT_NEWLINE) {
1447 if (test_type_token(type, token, TEP_EVENT_ITEM, "field"))
1451 type = read_token(&token);
1453 * The ftrace fields may still use the "special" name.
1456 if (event->flags & TEP_EVENT_FL_ISFTRACE &&
1457 type == TEP_EVENT_ITEM && strcmp(token, "special") == 0) {
1459 type = read_token(&token);
1462 if (test_type_token(type, token, TEP_EVENT_OP, ":") < 0)
1466 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
1471 field = calloc(1, sizeof(*field));
1475 field->event = event;
1477 /* read the rest of the type */
1479 type = read_token(&token);
1480 if (type == TEP_EVENT_ITEM ||
1481 (type == TEP_EVENT_OP && strcmp(token, "*") == 0) ||
1483 * Some of the ftrace fields are broken and have
1484 * an illegal "." in them.
1486 (event->flags & TEP_EVENT_FL_ISFTRACE &&
1487 type == TEP_EVENT_OP && strcmp(token, ".") == 0)) {
1489 if (strcmp(token, "*") == 0)
1490 field->flags |= TEP_FIELD_IS_POINTER;
1494 new_type = realloc(field->type,
1495 strlen(field->type) +
1496 strlen(last_token) + 2);
1501 field->type = new_type;
1502 strcat(field->type, " ");
1503 strcat(field->type, last_token);
1506 field->type = last_token;
1515 do_warning_event(event, "%s: no type found", __func__);
1518 field->name = field->alias = last_token;
1520 if (test_type(type, TEP_EVENT_OP))
1523 if (strcmp(token, "[") == 0) {
1524 enum tep_event_type last_type = type;
1525 char *brackets = token;
1529 field->flags |= TEP_FIELD_IS_ARRAY;
1531 type = read_token(&token);
1533 if (type == TEP_EVENT_ITEM)
1534 field->arraylen = strtoul(token, NULL, 0);
1536 field->arraylen = 0;
1538 while (strcmp(token, "]") != 0) {
1539 if (last_type == TEP_EVENT_ITEM &&
1540 type == TEP_EVENT_ITEM)
1546 new_brackets = realloc(brackets,
1548 strlen(token) + len);
1549 if (!new_brackets) {
1553 brackets = new_brackets;
1555 strcat(brackets, " ");
1556 strcat(brackets, token);
1557 /* We only care about the last token */
1558 field->arraylen = strtoul(token, NULL, 0);
1560 type = read_token(&token);
1561 if (type == TEP_EVENT_NONE) {
1562 do_warning_event(event, "failed to find token");
1569 new_brackets = realloc(brackets, strlen(brackets) + 2);
1570 if (!new_brackets) {
1574 brackets = new_brackets;
1575 strcat(brackets, "]");
1577 /* add brackets to type */
1579 type = read_token(&token);
1581 * If the next token is not an OP, then it is of
1582 * the format: type [] item;
1584 if (type == TEP_EVENT_ITEM) {
1586 new_type = realloc(field->type,
1587 strlen(field->type) +
1588 strlen(field->name) +
1589 strlen(brackets) + 2);
1594 field->type = new_type;
1595 strcat(field->type, " ");
1596 strcat(field->type, field->name);
1597 size_dynamic = type_size(field->name);
1598 free_token(field->name);
1599 strcat(field->type, brackets);
1600 field->name = field->alias = token;
1601 type = read_token(&token);
1604 new_type = realloc(field->type,
1605 strlen(field->type) +
1606 strlen(brackets) + 1);
1611 field->type = new_type;
1612 strcat(field->type, brackets);
1617 if (field_is_string(field))
1618 field->flags |= TEP_FIELD_IS_STRING;
1619 if (field_is_dynamic(field))
1620 field->flags |= TEP_FIELD_IS_DYNAMIC;
1621 if (field_is_long(field))
1622 field->flags |= TEP_FIELD_IS_LONG;
1624 if (test_type_token(type, token, TEP_EVENT_OP, ";"))
1628 if (read_expected(TEP_EVENT_ITEM, "offset") < 0)
1631 if (read_expected(TEP_EVENT_OP, ":") < 0)
1634 if (read_expect_type(TEP_EVENT_ITEM, &token))
1636 field->offset = strtoul(token, NULL, 0);
1639 if (read_expected(TEP_EVENT_OP, ";") < 0)
1642 if (read_expected(TEP_EVENT_ITEM, "size") < 0)
1645 if (read_expected(TEP_EVENT_OP, ":") < 0)
1648 if (read_expect_type(TEP_EVENT_ITEM, &token))
1650 field->size = strtoul(token, NULL, 0);
1653 if (read_expected(TEP_EVENT_OP, ";") < 0)
1656 type = read_token(&token);
1657 if (type != TEP_EVENT_NEWLINE) {
1658 /* newer versions of the kernel have a "signed" type */
1659 if (test_type_token(type, token, TEP_EVENT_ITEM, "signed"))
1664 if (read_expected(TEP_EVENT_OP, ":") < 0)
1667 if (read_expect_type(TEP_EVENT_ITEM, &token))
1670 if (strtoul(token, NULL, 0))
1671 field->flags |= TEP_FIELD_IS_SIGNED;
1674 if (read_expected(TEP_EVENT_OP, ";") < 0)
1677 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
1683 if (field->flags & TEP_FIELD_IS_ARRAY) {
1684 if (field->arraylen)
1685 field->elementsize = field->size / field->arraylen;
1686 else if (field->flags & TEP_FIELD_IS_DYNAMIC)
1687 field->elementsize = size_dynamic;
1688 else if (field->flags & TEP_FIELD_IS_STRING)
1689 field->elementsize = 1;
1690 else if (field->flags & TEP_FIELD_IS_LONG)
1691 field->elementsize = event->tep ?
1692 event->tep->long_size :
1695 field->elementsize = field->size;
1698 fields = &field->next;
1715 static int event_read_format(struct tep_event *event)
1720 if (read_expected_item(TEP_EVENT_ITEM, "format") < 0)
1723 if (read_expected(TEP_EVENT_OP, ":") < 0)
1726 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
1730 ret = event_read_fields(event, &event->format.common_fields);
1733 event->format.nr_common = ret;
1735 ret = event_read_fields(event, &event->format.fields);
1738 event->format.nr_fields = ret;
1747 static enum tep_event_type
1748 process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
1749 char **tok, enum tep_event_type type);
1751 static enum tep_event_type
1752 process_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1754 enum tep_event_type type;
1757 type = read_token(&token);
1760 return process_arg_token(event, arg, tok, type);
1763 static enum tep_event_type
1764 process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok);
1767 * For __print_symbolic() and __print_flags, we need to completely
1768 * evaluate the first argument, which defines what to print next.
1770 static enum tep_event_type
1771 process_field_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1773 enum tep_event_type type;
1775 type = process_arg(event, arg, tok);
1777 while (type == TEP_EVENT_OP) {
1778 type = process_op(event, arg, tok);
1784 static enum tep_event_type
1785 process_cond(struct tep_event *event, struct tep_print_arg *top, char **tok)
1787 struct tep_print_arg *arg, *left, *right;
1788 enum tep_event_type type;
1793 right = alloc_arg();
1795 if (!arg || !left || !right) {
1796 do_warning_event(event, "%s: not enough memory!", __func__);
1797 /* arg will be freed at out_free */
1803 arg->type = TEP_PRINT_OP;
1804 arg->op.left = left;
1805 arg->op.right = right;
1808 type = process_arg(event, left, &token);
1811 if (type == TEP_EVENT_ERROR)
1814 /* Handle other operations in the arguments */
1815 if (type == TEP_EVENT_OP && strcmp(token, ":") != 0) {
1816 type = process_op(event, left, &token);
1820 if (test_type_token(type, token, TEP_EVENT_OP, ":"))
1825 type = process_arg(event, right, &token);
1827 top->op.right = arg;
1833 /* Top may point to itself */
1834 top->op.right = NULL;
1837 return TEP_EVENT_ERROR;
1840 static enum tep_event_type
1841 process_array(struct tep_event *event, struct tep_print_arg *top, char **tok)
1843 struct tep_print_arg *arg;
1844 enum tep_event_type type;
1849 do_warning_event(event, "%s: not enough memory!", __func__);
1850 /* '*tok' is set to top->op.op. No need to free. */
1852 return TEP_EVENT_ERROR;
1856 type = process_arg(event, arg, &token);
1857 if (test_type_token(type, token, TEP_EVENT_OP, "]"))
1860 top->op.right = arg;
1863 type = read_token_item(&token);
1871 return TEP_EVENT_ERROR;
1874 static int get_op_prio(char *op)
1888 /* '>>' and '<<' are 8 */
1892 /* '==' and '!=' are 10 */
1902 do_warning("unknown op '%c'", op[0]);
1906 if (strcmp(op, "++") == 0 ||
1907 strcmp(op, "--") == 0) {
1909 } else if (strcmp(op, ">>") == 0 ||
1910 strcmp(op, "<<") == 0) {
1912 } else if (strcmp(op, ">=") == 0 ||
1913 strcmp(op, "<=") == 0) {
1915 } else if (strcmp(op, "==") == 0 ||
1916 strcmp(op, "!=") == 0) {
1918 } else if (strcmp(op, "&&") == 0) {
1920 } else if (strcmp(op, "||") == 0) {
1923 do_warning("unknown op '%s'", op);
1929 static int set_op_prio(struct tep_print_arg *arg)
1932 /* single ops are the greatest */
1933 if (!arg->op.left || arg->op.left->type == TEP_PRINT_NULL)
1936 arg->op.prio = get_op_prio(arg->op.op);
1938 return arg->op.prio;
1941 /* Note, *tok does not get freed, but will most likely be saved */
1942 static enum tep_event_type
1943 process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1945 struct tep_print_arg *left, *right = NULL;
1946 enum tep_event_type type;
1949 /* the op is passed in via tok */
1952 if (arg->type == TEP_PRINT_OP && !arg->op.left) {
1953 /* handle single op */
1955 do_warning_event(event, "bad op token %s", token);
1965 do_warning_event(event, "bad op token %s", token);
1970 /* make an empty left */
1975 left->type = TEP_PRINT_NULL;
1976 arg->op.left = left;
1978 right = alloc_arg();
1982 arg->op.right = right;
1984 /* do not free the token, it belongs to an op */
1986 type = process_arg(event, right, tok);
1988 } else if (strcmp(token, "?") == 0) {
1994 /* copy the top arg to the left */
1997 arg->type = TEP_PRINT_OP;
1999 arg->op.left = left;
2002 /* it will set arg->op.right */
2003 type = process_cond(event, arg, tok);
2005 } else if (strcmp(token, ">>") == 0 ||
2006 strcmp(token, "<<") == 0 ||
2007 strcmp(token, "&") == 0 ||
2008 strcmp(token, "|") == 0 ||
2009 strcmp(token, "&&") == 0 ||
2010 strcmp(token, "||") == 0 ||
2011 strcmp(token, "-") == 0 ||
2012 strcmp(token, "+") == 0 ||
2013 strcmp(token, "*") == 0 ||
2014 strcmp(token, "^") == 0 ||
2015 strcmp(token, "/") == 0 ||
2016 strcmp(token, "%") == 0 ||
2017 strcmp(token, "<") == 0 ||
2018 strcmp(token, ">") == 0 ||
2019 strcmp(token, "<=") == 0 ||
2020 strcmp(token, ">=") == 0 ||
2021 strcmp(token, "==") == 0 ||
2022 strcmp(token, "!=") == 0) {
2028 /* copy the top arg to the left */
2031 arg->type = TEP_PRINT_OP;
2033 arg->op.left = left;
2034 arg->op.right = NULL;
2036 if (set_op_prio(arg) == -1) {
2037 event->flags |= TEP_EVENT_FL_FAILED;
2038 /* arg->op.op (= token) will be freed at out_free */
2043 type = read_token_item(&token);
2046 /* could just be a type pointer */
2047 if ((strcmp(arg->op.op, "*") == 0) &&
2048 type == TEP_EVENT_DELIM && (strcmp(token, ")") == 0)) {
2051 if (left->type != TEP_PRINT_ATOM) {
2052 do_warning_event(event, "bad pointer type");
2055 new_atom = realloc(left->atom.atom,
2056 strlen(left->atom.atom) + 3);
2060 left->atom.atom = new_atom;
2061 strcat(left->atom.atom, " *");
2069 right = alloc_arg();
2073 type = process_arg_token(event, right, tok, type);
2074 if (type == TEP_EVENT_ERROR) {
2076 /* token was freed in process_arg_token() via *tok */
2081 if (right->type == TEP_PRINT_OP &&
2082 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2083 struct tep_print_arg tmp;
2085 /* rotate ops according to the priority */
2086 arg->op.right = right->op.left;
2092 arg->op.left = right;
2094 arg->op.right = right;
2097 } else if (strcmp(token, "[") == 0) {
2105 arg->type = TEP_PRINT_OP;
2107 arg->op.left = left;
2111 /* it will set arg->op.right */
2112 type = process_array(event, arg, tok);
2115 do_warning_event(event, "unknown op '%s'", token);
2116 event->flags |= TEP_EVENT_FL_FAILED;
2117 /* the arg is now the left side */
2121 if (type == TEP_EVENT_OP && strcmp(*tok, ":") != 0) {
2124 /* higher prios need to be closer to the root */
2125 prio = get_op_prio(*tok);
2127 if (prio > arg->op.prio)
2128 return process_op(event, arg, tok);
2130 return process_op(event, right, tok);
2136 do_warning_event(event, "%s: not enough memory!", __func__);
2140 return TEP_EVENT_ERROR;
2143 static enum tep_event_type
2144 process_entry(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2147 enum tep_event_type type;
2151 if (read_expected(TEP_EVENT_OP, "->") < 0)
2154 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2158 arg->type = TEP_PRINT_FIELD;
2159 arg->field.name = field;
2161 if (is_flag_field) {
2162 arg->field.field = tep_find_any_field(event, arg->field.name);
2163 arg->field.field->flags |= TEP_FIELD_IS_FLAG;
2165 } else if (is_symbolic_field) {
2166 arg->field.field = tep_find_any_field(event, arg->field.name);
2167 arg->field.field->flags |= TEP_FIELD_IS_SYMBOLIC;
2168 is_symbolic_field = 0;
2171 type = read_token(&token);
2180 return TEP_EVENT_ERROR;
2183 static int alloc_and_process_delim(struct tep_event *event, char *next_token,
2184 struct tep_print_arg **print_arg)
2186 struct tep_print_arg *field;
2187 enum tep_event_type type;
2191 field = alloc_arg();
2193 do_warning_event(event, "%s: not enough memory!", __func__);
2198 type = process_arg(event, field, &token);
2200 if (test_type_token(type, token, TEP_EVENT_DELIM, next_token)) {
2204 goto out_free_token;
2215 static char *arg_eval (struct tep_print_arg *arg);
2217 static unsigned long long
2218 eval_type_str(unsigned long long val, const char *type, int pointer)
2228 if (type[len-1] != '*') {
2229 do_warning("pointer expected with non pointer type");
2235 do_warning("%s: not enough memory!", __func__);
2238 memcpy(ref, type, len);
2240 /* chop off the " *" */
2243 val = eval_type_str(val, ref, 0);
2248 /* check if this is a pointer */
2249 if (type[len - 1] == '*')
2252 /* Try to figure out the arg size*/
2253 if (strncmp(type, "struct", 6) == 0)
2257 if (strcmp(type, "u8") == 0)
2260 if (strcmp(type, "u16") == 0)
2261 return val & 0xffff;
2263 if (strcmp(type, "u32") == 0)
2264 return val & 0xffffffff;
2266 if (strcmp(type, "u64") == 0 ||
2267 strcmp(type, "s64") == 0)
2270 if (strcmp(type, "s8") == 0)
2271 return (unsigned long long)(char)val & 0xff;
2273 if (strcmp(type, "s16") == 0)
2274 return (unsigned long long)(short)val & 0xffff;
2276 if (strcmp(type, "s32") == 0)
2277 return (unsigned long long)(int)val & 0xffffffff;
2279 if (strncmp(type, "unsigned ", 9) == 0) {
2284 if (strcmp(type, "char") == 0) {
2286 return (unsigned long long)(char)val & 0xff;
2291 if (strcmp(type, "short") == 0) {
2293 return (unsigned long long)(short)val & 0xffff;
2295 return val & 0xffff;
2298 if (strcmp(type, "int") == 0) {
2300 return (unsigned long long)(int)val & 0xffffffff;
2302 return val & 0xffffffff;
2309 * Try to figure out the type.
2311 static unsigned long long
2312 eval_type(unsigned long long val, struct tep_print_arg *arg, int pointer)
2314 if (arg->type != TEP_PRINT_TYPE) {
2315 do_warning("expected type argument");
2319 return eval_type_str(val, arg->typecast.type, pointer);
2322 static int arg_num_eval(struct tep_print_arg *arg, long long *val)
2324 long long left, right;
2327 switch (arg->type) {
2328 case TEP_PRINT_ATOM:
2329 *val = strtoll(arg->atom.atom, NULL, 0);
2331 case TEP_PRINT_TYPE:
2332 ret = arg_num_eval(arg->typecast.item, val);
2335 *val = eval_type(*val, arg, 0);
2338 switch (arg->op.op[0]) {
2340 ret = arg_num_eval(arg->op.left, &left);
2343 ret = arg_num_eval(arg->op.right, &right);
2347 *val = left || right;
2349 *val = left | right;
2352 ret = arg_num_eval(arg->op.left, &left);
2355 ret = arg_num_eval(arg->op.right, &right);
2359 *val = left && right;
2361 *val = left & right;
2364 ret = arg_num_eval(arg->op.left, &left);
2367 ret = arg_num_eval(arg->op.right, &right);
2370 switch (arg->op.op[1]) {
2372 *val = left < right;
2375 *val = left << right;
2378 *val = left <= right;
2381 do_warning("unknown op '%s'", arg->op.op);
2386 ret = arg_num_eval(arg->op.left, &left);
2389 ret = arg_num_eval(arg->op.right, &right);
2392 switch (arg->op.op[1]) {
2394 *val = left > right;
2397 *val = left >> right;
2400 *val = left >= right;
2403 do_warning("unknown op '%s'", arg->op.op);
2408 ret = arg_num_eval(arg->op.left, &left);
2411 ret = arg_num_eval(arg->op.right, &right);
2415 if (arg->op.op[1] != '=') {
2416 do_warning("unknown op '%s'", arg->op.op);
2419 *val = left == right;
2422 ret = arg_num_eval(arg->op.left, &left);
2425 ret = arg_num_eval(arg->op.right, &right);
2429 switch (arg->op.op[1]) {
2431 *val = left != right;
2434 do_warning("unknown op '%s'", arg->op.op);
2439 /* check for negative */
2440 if (arg->op.left->type == TEP_PRINT_NULL)
2443 ret = arg_num_eval(arg->op.left, &left);
2446 ret = arg_num_eval(arg->op.right, &right);
2449 *val = left - right;
2452 if (arg->op.left->type == TEP_PRINT_NULL)
2455 ret = arg_num_eval(arg->op.left, &left);
2458 ret = arg_num_eval(arg->op.right, &right);
2461 *val = left + right;
2464 ret = arg_num_eval(arg->op.right, &right);
2470 do_warning("unknown op '%s'", arg->op.op);
2475 case TEP_PRINT_NULL:
2476 case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
2477 case TEP_PRINT_STRING:
2478 case TEP_PRINT_BSTRING:
2479 case TEP_PRINT_BITMASK:
2481 do_warning("invalid eval type %d", arg->type);
2488 static char *arg_eval (struct tep_print_arg *arg)
2491 static char buf[24];
2493 switch (arg->type) {
2494 case TEP_PRINT_ATOM:
2495 return arg->atom.atom;
2496 case TEP_PRINT_TYPE:
2497 return arg_eval(arg->typecast.item);
2499 if (!arg_num_eval(arg, &val))
2501 sprintf(buf, "%lld", val);
2504 case TEP_PRINT_NULL:
2505 case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
2506 case TEP_PRINT_STRING:
2507 case TEP_PRINT_BSTRING:
2508 case TEP_PRINT_BITMASK:
2510 do_warning("invalid eval type %d", arg->type);
2517 static enum tep_event_type
2518 process_fields(struct tep_event *event, struct tep_print_flag_sym **list, char **tok)
2520 enum tep_event_type type;
2521 struct tep_print_arg *arg = NULL;
2522 struct tep_print_flag_sym *field;
2528 type = read_token_item(&token);
2529 if (test_type_token(type, token, TEP_EVENT_OP, "{"))
2537 type = process_arg(event, arg, &token);
2539 if (type == TEP_EVENT_OP)
2540 type = process_op(event, arg, &token);
2542 if (type == TEP_EVENT_ERROR)
2545 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2548 field = calloc(1, sizeof(*field));
2552 value = arg_eval(arg);
2554 goto out_free_field;
2555 field->value = strdup(value);
2556 if (field->value == NULL)
2557 goto out_free_field;
2565 type = process_arg(event, arg, &token);
2566 if (test_type_token(type, token, TEP_EVENT_OP, "}"))
2567 goto out_free_field;
2569 value = arg_eval(arg);
2571 goto out_free_field;
2572 field->str = strdup(value);
2573 if (field->str == NULL)
2574 goto out_free_field;
2579 list = &field->next;
2582 type = read_token_item(&token);
2583 } while (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0);
2589 free_flag_sym(field);
2595 return TEP_EVENT_ERROR;
2598 static enum tep_event_type
2599 process_flags(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2601 struct tep_print_arg *field;
2602 enum tep_event_type type;
2605 memset(arg, 0, sizeof(*arg));
2606 arg->type = TEP_PRINT_FLAGS;
2608 field = alloc_arg();
2610 do_warning_event(event, "%s: not enough memory!", __func__);
2614 type = process_field_arg(event, field, &token);
2616 /* Handle operations in the first argument */
2617 while (type == TEP_EVENT_OP)
2618 type = process_op(event, field, &token);
2620 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2621 goto out_free_field;
2624 arg->flags.field = field;
2626 type = read_token_item(&token);
2627 if (event_item_type(type)) {
2628 arg->flags.delim = token;
2629 type = read_token_item(&token);
2632 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2635 type = process_fields(event, &arg->flags.flags, &token);
2636 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2640 type = read_token_item(tok);
2648 return TEP_EVENT_ERROR;
2651 static enum tep_event_type
2652 process_symbols(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2654 struct tep_print_arg *field;
2655 enum tep_event_type type;
2658 memset(arg, 0, sizeof(*arg));
2659 arg->type = TEP_PRINT_SYMBOL;
2661 field = alloc_arg();
2663 do_warning_event(event, "%s: not enough memory!", __func__);
2667 type = process_field_arg(event, field, &token);
2669 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2670 goto out_free_field;
2672 arg->symbol.field = field;
2674 type = process_fields(event, &arg->symbol.symbols, &token);
2675 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2679 type = read_token_item(tok);
2687 return TEP_EVENT_ERROR;
2690 static enum tep_event_type
2691 process_hex_common(struct tep_event *event, struct tep_print_arg *arg,
2692 char **tok, enum tep_print_arg_type type)
2694 memset(arg, 0, sizeof(*arg));
2697 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2700 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2703 return read_token_item(tok);
2706 free_arg(arg->hex.field);
2707 arg->hex.field = NULL;
2710 return TEP_EVENT_ERROR;
2713 static enum tep_event_type
2714 process_hex(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2716 return process_hex_common(event, arg, tok, TEP_PRINT_HEX);
2719 static enum tep_event_type
2720 process_hex_str(struct tep_event *event, struct tep_print_arg *arg,
2723 return process_hex_common(event, arg, tok, TEP_PRINT_HEX_STR);
2726 static enum tep_event_type
2727 process_int_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2729 memset(arg, 0, sizeof(*arg));
2730 arg->type = TEP_PRINT_INT_ARRAY;
2732 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2735 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2738 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2741 return read_token_item(tok);
2744 free_arg(arg->int_array.count);
2745 arg->int_array.count = NULL;
2747 free_arg(arg->int_array.field);
2748 arg->int_array.field = NULL;
2751 return TEP_EVENT_ERROR;
2754 static enum tep_event_type
2755 process_dynamic_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2757 struct tep_format_field *field;
2758 enum tep_event_type type;
2761 memset(arg, 0, sizeof(*arg));
2762 arg->type = TEP_PRINT_DYNAMIC_ARRAY;
2765 * The item within the parenthesis is another field that holds
2766 * the index into where the array starts.
2768 type = read_token(&token);
2770 if (type != TEP_EVENT_ITEM)
2773 /* Find the field */
2775 field = tep_find_field(event, token);
2779 arg->dynarray.field = field;
2780 arg->dynarray.index = 0;
2782 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2786 type = read_token_item(&token);
2788 if (type != TEP_EVENT_OP || strcmp(token, "[") != 0)
2794 do_warning_event(event, "%s: not enough memory!", __func__);
2796 return TEP_EVENT_ERROR;
2799 type = process_arg(event, arg, &token);
2800 if (type == TEP_EVENT_ERROR)
2803 if (!test_type_token(type, token, TEP_EVENT_OP, "]"))
2807 type = read_token_item(tok);
2815 return TEP_EVENT_ERROR;
2818 static enum tep_event_type
2819 process_dynamic_array_len(struct tep_event *event, struct tep_print_arg *arg,
2822 struct tep_format_field *field;
2823 enum tep_event_type type;
2826 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2829 arg->type = TEP_PRINT_DYNAMIC_ARRAY_LEN;
2831 /* Find the field */
2832 field = tep_find_field(event, token);
2836 arg->dynarray.field = field;
2837 arg->dynarray.index = 0;
2839 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2842 type = read_token(&token);
2851 return TEP_EVENT_ERROR;
2854 static enum tep_event_type
2855 process_paren(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2857 struct tep_print_arg *item_arg;
2858 enum tep_event_type type;
2861 type = process_arg(event, arg, &token);
2863 if (type == TEP_EVENT_ERROR)
2866 if (type == TEP_EVENT_OP)
2867 type = process_op(event, arg, &token);
2869 if (type == TEP_EVENT_ERROR)
2872 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2876 type = read_token_item(&token);
2879 * If the next token is an item or another open paren, then
2880 * this was a typecast.
2882 if (event_item_type(type) ||
2883 (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0)) {
2885 /* make this a typecast and contine */
2887 /* prevous must be an atom */
2888 if (arg->type != TEP_PRINT_ATOM) {
2889 do_warning_event(event, "previous needed to be TEP_PRINT_ATOM");
2893 item_arg = alloc_arg();
2895 do_warning_event(event, "%s: not enough memory!",
2900 arg->type = TEP_PRINT_TYPE;
2901 arg->typecast.type = arg->atom.atom;
2902 arg->typecast.item = item_arg;
2903 type = process_arg_token(event, item_arg, &token, type);
2913 return TEP_EVENT_ERROR;
2917 static enum tep_event_type
2918 process_str(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2921 enum tep_event_type type;
2924 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2927 arg->type = TEP_PRINT_STRING;
2928 arg->string.string = token;
2929 arg->string.offset = -1;
2931 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2934 type = read_token(&token);
2943 return TEP_EVENT_ERROR;
2946 static enum tep_event_type
2947 process_bitmask(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2950 enum tep_event_type type;
2953 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2956 arg->type = TEP_PRINT_BITMASK;
2957 arg->bitmask.bitmask = token;
2958 arg->bitmask.offset = -1;
2960 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2963 type = read_token(&token);
2972 return TEP_EVENT_ERROR;
2975 static struct tep_function_handler *
2976 find_func_handler(struct tep_handle *tep, char *func_name)
2978 struct tep_function_handler *func;
2983 for (func = tep->func_handlers; func; func = func->next) {
2984 if (strcmp(func->name, func_name) == 0)
2991 static void remove_func_handler(struct tep_handle *tep, char *func_name)
2993 struct tep_function_handler *func;
2994 struct tep_function_handler **next;
2996 next = &tep->func_handlers;
2997 while ((func = *next)) {
2998 if (strcmp(func->name, func_name) == 0) {
3000 free_func_handle(func);
3007 static enum tep_event_type
3008 process_func_handler(struct tep_event *event, struct tep_function_handler *func,
3009 struct tep_print_arg *arg, char **tok)
3011 struct tep_print_arg **next_arg;
3012 struct tep_print_arg *farg;
3013 enum tep_event_type type;
3017 arg->type = TEP_PRINT_FUNC;
3018 arg->func.func = func;
3022 next_arg = &(arg->func.args);
3023 for (i = 0; i < func->nr_args; i++) {
3026 do_warning_event(event, "%s: not enough memory!",
3028 return TEP_EVENT_ERROR;
3031 type = process_arg(event, farg, &token);
3032 if (i < (func->nr_args - 1)) {
3033 if (type != TEP_EVENT_DELIM || strcmp(token, ",") != 0) {
3034 do_warning_event(event,
3035 "Error: function '%s()' expects %d arguments but event %s only uses %d",
3036 func->name, func->nr_args,
3037 event->name, i + 1);
3041 if (type != TEP_EVENT_DELIM || strcmp(token, ")") != 0) {
3042 do_warning_event(event,
3043 "Error: function '%s()' only expects %d arguments but event %s has more",
3044 func->name, func->nr_args, event->name);
3050 next_arg = &(farg->next);
3054 type = read_token(&token);
3062 return TEP_EVENT_ERROR;
3065 static enum tep_event_type
3066 process_function(struct tep_event *event, struct tep_print_arg *arg,
3067 char *token, char **tok)
3069 struct tep_function_handler *func;
3071 if (strcmp(token, "__print_flags") == 0) {
3074 return process_flags(event, arg, tok);
3076 if (strcmp(token, "__print_symbolic") == 0) {
3078 is_symbolic_field = 1;
3079 return process_symbols(event, arg, tok);
3081 if (strcmp(token, "__print_hex") == 0) {
3083 return process_hex(event, arg, tok);
3085 if (strcmp(token, "__print_hex_str") == 0) {
3087 return process_hex_str(event, arg, tok);
3089 if (strcmp(token, "__print_array") == 0) {
3091 return process_int_array(event, arg, tok);
3093 if (strcmp(token, "__get_str") == 0) {
3095 return process_str(event, arg, tok);
3097 if (strcmp(token, "__get_bitmask") == 0) {
3099 return process_bitmask(event, arg, tok);
3101 if (strcmp(token, "__get_dynamic_array") == 0) {
3103 return process_dynamic_array(event, arg, tok);
3105 if (strcmp(token, "__get_dynamic_array_len") == 0) {
3107 return process_dynamic_array_len(event, arg, tok);
3110 func = find_func_handler(event->tep, token);
3113 return process_func_handler(event, func, arg, tok);
3116 do_warning_event(event, "function %s not defined", token);
3118 return TEP_EVENT_ERROR;
3121 static enum tep_event_type
3122 process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
3123 char **tok, enum tep_event_type type)
3131 case TEP_EVENT_ITEM:
3132 if (strcmp(token, "REC") == 0) {
3134 type = process_entry(event, arg, &token);
3138 /* test the next token */
3139 type = read_token_item(&token);
3142 * If the next token is a parenthesis, then this
3145 if (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0) {
3148 /* this will free atom. */
3149 type = process_function(event, arg, atom, &token);
3152 /* atoms can be more than one token long */
3153 while (type == TEP_EVENT_ITEM) {
3155 new_atom = realloc(atom,
3156 strlen(atom) + strlen(token) + 2);
3161 return TEP_EVENT_ERROR;
3165 strcat(atom, token);
3167 type = read_token_item(&token);
3170 arg->type = TEP_PRINT_ATOM;
3171 arg->atom.atom = atom;
3174 case TEP_EVENT_DQUOTE:
3175 case TEP_EVENT_SQUOTE:
3176 arg->type = TEP_PRINT_ATOM;
3177 arg->atom.atom = token;
3178 type = read_token_item(&token);
3180 case TEP_EVENT_DELIM:
3181 if (strcmp(token, "(") == 0) {
3183 type = process_paren(event, arg, &token);
3187 /* handle single ops */
3188 arg->type = TEP_PRINT_OP;
3190 arg->op.left = NULL;
3191 type = process_op(event, arg, &token);
3193 /* On error, the op is freed */
3194 if (type == TEP_EVENT_ERROR)
3197 /* return error type if errored */
3200 case TEP_EVENT_ERROR ... TEP_EVENT_NEWLINE:
3202 do_warning_event(event, "unexpected type %d", type);
3203 return TEP_EVENT_ERROR;
3210 static int event_read_print_args(struct tep_event *event, struct tep_print_arg **list)
3212 enum tep_event_type type = TEP_EVENT_ERROR;
3213 struct tep_print_arg *arg;
3218 if (type == TEP_EVENT_NEWLINE) {
3219 type = read_token_item(&token);
3225 do_warning_event(event, "%s: not enough memory!",
3230 type = process_arg(event, arg, &token);
3232 if (type == TEP_EVENT_ERROR) {
3241 if (type == TEP_EVENT_OP) {
3242 type = process_op(event, arg, &token);
3244 if (type == TEP_EVENT_ERROR) {
3253 if (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0) {
3260 } while (type != TEP_EVENT_NONE);
3262 if (type != TEP_EVENT_NONE && type != TEP_EVENT_ERROR)
3268 static int event_read_print(struct tep_event *event)
3270 enum tep_event_type type;
3274 if (read_expected_item(TEP_EVENT_ITEM, "print") < 0)
3277 if (read_expected(TEP_EVENT_ITEM, "fmt") < 0)
3280 if (read_expected(TEP_EVENT_OP, ":") < 0)
3283 if (read_expect_type(TEP_EVENT_DQUOTE, &token) < 0)
3287 event->print_fmt.format = token;
3288 event->print_fmt.args = NULL;
3290 /* ok to have no arg */
3291 type = read_token_item(&token);
3293 if (type == TEP_EVENT_NONE)
3296 /* Handle concatenation of print lines */
3297 if (type == TEP_EVENT_DQUOTE) {
3300 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
3303 free_token(event->print_fmt.format);
3304 event->print_fmt.format = NULL;
3309 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
3314 ret = event_read_print_args(event, &event->print_fmt.args);
3326 * tep_find_common_field - return a common field by event
3327 * @event: handle for the event
3328 * @name: the name of the common field to return
3330 * Returns a common field from the event by the given @name.
3331 * This only searches the common fields and not all field.
3333 struct tep_format_field *
3334 tep_find_common_field(struct tep_event *event, const char *name)
3336 struct tep_format_field *format;
3338 for (format = event->format.common_fields;
3339 format; format = format->next) {
3340 if (strcmp(format->name, name) == 0)
3348 * tep_find_field - find a non-common field
3349 * @event: handle for the event
3350 * @name: the name of the non-common field
3352 * Returns a non-common field by the given @name.
3353 * This does not search common fields.
3355 struct tep_format_field *
3356 tep_find_field(struct tep_event *event, const char *name)
3358 struct tep_format_field *format;
3360 for (format = event->format.fields;
3361 format; format = format->next) {
3362 if (strcmp(format->name, name) == 0)
3370 * tep_find_any_field - find any field by name
3371 * @event: handle for the event
3372 * @name: the name of the field
3374 * Returns a field by the given @name.
3375 * This searches the common field names first, then
3376 * the non-common ones if a common one was not found.
3378 struct tep_format_field *
3379 tep_find_any_field(struct tep_event *event, const char *name)
3381 struct tep_format_field *format;
3383 format = tep_find_common_field(event, name);
3386 return tep_find_field(event, name);
3390 * tep_read_number - read a number from data
3391 * @tep: a handle to the trace event parser context
3392 * @ptr: the raw data
3393 * @size: the size of the data that holds the number
3395 * Returns the number (converted to host) from the
3398 unsigned long long tep_read_number(struct tep_handle *tep,
3399 const void *ptr, int size)
3401 unsigned long long val;
3405 return *(unsigned char *)ptr;
3407 return tep_data2host2(tep, *(unsigned short *)ptr);
3409 return tep_data2host4(tep, *(unsigned int *)ptr);
3411 memcpy(&val, (ptr), sizeof(unsigned long long));
3412 return tep_data2host8(tep, val);
3420 * tep_read_number_field - read a number from data
3421 * @field: a handle to the field
3422 * @data: the raw data to read
3423 * @value: the value to place the number in
3425 * Reads raw data according to a field offset and size,
3426 * and translates it into @value.
3428 * Returns 0 on success, -1 otherwise.
3430 int tep_read_number_field(struct tep_format_field *field, const void *data,
3431 unsigned long long *value)
3435 switch (field->size) {
3440 *value = tep_read_number(field->event->tep,
3441 data + field->offset, field->size);
3448 static int get_common_info(struct tep_handle *tep,
3449 const char *type, int *offset, int *size)
3451 struct tep_event *event;
3452 struct tep_format_field *field;
3455 * All events should have the same common elements.
3456 * Pick any event to find where the type is;
3459 do_warning("no event_list!");
3463 event = tep->events[0];
3464 field = tep_find_common_field(event, type);
3468 *offset = field->offset;
3469 *size = field->size;
3474 static int __parse_common(struct tep_handle *tep, void *data,
3475 int *size, int *offset, const char *name)
3480 ret = get_common_info(tep, name, offset, size);
3484 return tep_read_number(tep, data + *offset, *size);
3487 static int trace_parse_common_type(struct tep_handle *tep, void *data)
3489 return __parse_common(tep, data,
3490 &tep->type_size, &tep->type_offset,
3494 static int parse_common_pid(struct tep_handle *tep, void *data)
3496 return __parse_common(tep, data,
3497 &tep->pid_size, &tep->pid_offset,
3501 static int parse_common_pc(struct tep_handle *tep, void *data)
3503 return __parse_common(tep, data,
3504 &tep->pc_size, &tep->pc_offset,
3505 "common_preempt_count");
3508 static int parse_common_flags(struct tep_handle *tep, void *data)
3510 return __parse_common(tep, data,
3511 &tep->flags_size, &tep->flags_offset,
3515 static int parse_common_lock_depth(struct tep_handle *tep, void *data)
3517 return __parse_common(tep, data,
3518 &tep->ld_size, &tep->ld_offset,
3519 "common_lock_depth");
3522 static int parse_common_migrate_disable(struct tep_handle *tep, void *data)
3524 return __parse_common(tep, data,
3525 &tep->ld_size, &tep->ld_offset,
3526 "common_migrate_disable");
3529 static int events_id_cmp(const void *a, const void *b);
3532 * tep_find_event - find an event by given id
3533 * @tep: a handle to the trace event parser context
3534 * @id: the id of the event
3536 * Returns an event that has a given @id.
3538 struct tep_event *tep_find_event(struct tep_handle *tep, int id)
3540 struct tep_event **eventptr;
3541 struct tep_event key;
3542 struct tep_event *pkey = &key;
3544 /* Check cache first */
3545 if (tep->last_event && tep->last_event->id == id)
3546 return tep->last_event;
3550 eventptr = bsearch(&pkey, tep->events, tep->nr_events,
3551 sizeof(*tep->events), events_id_cmp);
3554 tep->last_event = *eventptr;
3562 * tep_find_event_by_name - find an event by given name
3563 * @tep: a handle to the trace event parser context
3564 * @sys: the system name to search for
3565 * @name: the name of the event to search for
3567 * This returns an event with a given @name and under the system
3568 * @sys. If @sys is NULL the first event with @name is returned.
3571 tep_find_event_by_name(struct tep_handle *tep,
3572 const char *sys, const char *name)
3574 struct tep_event *event = NULL;
3577 if (tep->last_event &&
3578 strcmp(tep->last_event->name, name) == 0 &&
3579 (!sys || strcmp(tep->last_event->system, sys) == 0))
3580 return tep->last_event;
3582 for (i = 0; i < tep->nr_events; i++) {
3583 event = tep->events[i];
3584 if (strcmp(event->name, name) == 0) {
3587 if (strcmp(event->system, sys) == 0)
3591 if (i == tep->nr_events)
3594 tep->last_event = event;
3598 static unsigned long long
3599 eval_num_arg(void *data, int size, struct tep_event *event, struct tep_print_arg *arg)
3601 struct tep_handle *tep = event->tep;
3602 unsigned long long val = 0;
3603 unsigned long long left, right;
3604 struct tep_print_arg *typearg = NULL;
3605 struct tep_print_arg *larg;
3606 unsigned long offset;
3607 unsigned int field_size;
3609 switch (arg->type) {
3610 case TEP_PRINT_NULL:
3613 case TEP_PRINT_ATOM:
3614 return strtoull(arg->atom.atom, NULL, 0);
3615 case TEP_PRINT_FIELD:
3616 if (!arg->field.field) {
3617 arg->field.field = tep_find_any_field(event, arg->field.name);
3618 if (!arg->field.field)
3619 goto out_warning_field;
3622 /* must be a number */
3623 val = tep_read_number(tep, data + arg->field.field->offset,
3624 arg->field.field->size);
3626 case TEP_PRINT_FLAGS:
3627 case TEP_PRINT_SYMBOL:
3628 case TEP_PRINT_INT_ARRAY:
3630 case TEP_PRINT_HEX_STR:
3632 case TEP_PRINT_TYPE:
3633 val = eval_num_arg(data, size, event, arg->typecast.item);
3634 return eval_type(val, arg, 0);
3635 case TEP_PRINT_STRING:
3636 case TEP_PRINT_BSTRING:
3637 case TEP_PRINT_BITMASK:
3639 case TEP_PRINT_FUNC: {
3642 val = process_defined_func(&s, data, size, event, arg);
3643 trace_seq_destroy(&s);
3647 if (strcmp(arg->op.op, "[") == 0) {
3649 * Arrays are special, since we don't want
3650 * to read the arg as is.
3652 right = eval_num_arg(data, size, event, arg->op.right);
3654 /* handle typecasts */
3655 larg = arg->op.left;
3656 while (larg->type == TEP_PRINT_TYPE) {
3659 larg = larg->typecast.item;
3662 /* Default to long size */
3663 field_size = tep->long_size;
3665 switch (larg->type) {
3666 case TEP_PRINT_DYNAMIC_ARRAY:
3667 offset = tep_read_number(tep,
3668 data + larg->dynarray.field->offset,
3669 larg->dynarray.field->size);
3670 if (larg->dynarray.field->elementsize)
3671 field_size = larg->dynarray.field->elementsize;
3673 * The actual length of the dynamic array is stored
3674 * in the top half of the field, and the offset
3675 * is in the bottom half of the 32 bit field.
3680 case TEP_PRINT_FIELD:
3681 if (!larg->field.field) {
3683 tep_find_any_field(event, larg->field.name);
3684 if (!larg->field.field) {
3686 goto out_warning_field;
3689 field_size = larg->field.field->elementsize;
3690 offset = larg->field.field->offset +
3691 right * larg->field.field->elementsize;
3694 goto default_op; /* oops, all bets off */
3696 val = tep_read_number(tep,
3697 data + offset, field_size);
3699 val = eval_type(val, typearg, 1);
3701 } else if (strcmp(arg->op.op, "?") == 0) {
3702 left = eval_num_arg(data, size, event, arg->op.left);
3703 arg = arg->op.right;
3705 val = eval_num_arg(data, size, event, arg->op.left);
3707 val = eval_num_arg(data, size, event, arg->op.right);
3711 left = eval_num_arg(data, size, event, arg->op.left);
3712 right = eval_num_arg(data, size, event, arg->op.right);
3713 switch (arg->op.op[0]) {
3715 switch (arg->op.op[1]) {
3720 val = left != right;
3723 goto out_warning_op;
3731 val = left || right;
3737 val = left && right;
3742 switch (arg->op.op[1]) {
3747 val = left << right;
3750 val = left <= right;
3753 goto out_warning_op;
3757 switch (arg->op.op[1]) {
3762 val = left >> right;
3765 val = left >= right;
3768 goto out_warning_op;
3772 if (arg->op.op[1] != '=')
3773 goto out_warning_op;
3775 val = left == right;
3793 goto out_warning_op;
3796 case TEP_PRINT_DYNAMIC_ARRAY_LEN:
3797 offset = tep_read_number(tep,
3798 data + arg->dynarray.field->offset,
3799 arg->dynarray.field->size);
3801 * The total allocated length of the dynamic array is
3802 * stored in the top half of the field, and the offset
3803 * is in the bottom half of the 32 bit field.
3805 val = (unsigned long long)(offset >> 16);
3807 case TEP_PRINT_DYNAMIC_ARRAY:
3808 /* Without [], we pass the address to the dynamic data */
3809 offset = tep_read_number(tep,
3810 data + arg->dynarray.field->offset,
3811 arg->dynarray.field->size);
3813 * The total allocated length of the dynamic array is
3814 * stored in the top half of the field, and the offset
3815 * is in the bottom half of the 32 bit field.
3818 val = (unsigned long long)((unsigned long)data + offset);
3820 default: /* not sure what to do there */
3826 do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
3830 do_warning_event(event, "%s: field %s not found",
3831 __func__, arg->field.name);
3837 unsigned long long value;
3840 static const struct flag flags[] = {
3841 { "HI_SOFTIRQ", 0 },
3842 { "TIMER_SOFTIRQ", 1 },
3843 { "NET_TX_SOFTIRQ", 2 },
3844 { "NET_RX_SOFTIRQ", 3 },
3845 { "BLOCK_SOFTIRQ", 4 },
3846 { "IRQ_POLL_SOFTIRQ", 5 },
3847 { "TASKLET_SOFTIRQ", 6 },
3848 { "SCHED_SOFTIRQ", 7 },
3849 { "HRTIMER_SOFTIRQ", 8 },
3850 { "RCU_SOFTIRQ", 9 },
3852 { "HRTIMER_NORESTART", 0 },
3853 { "HRTIMER_RESTART", 1 },
3856 static long long eval_flag(const char *flag)
3861 * Some flags in the format files do not get converted.
3862 * If the flag is not numeric, see if it is something that
3863 * we already know about.
3865 if (isdigit(flag[0]))
3866 return strtoull(flag, NULL, 0);
3868 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3869 if (strcmp(flags[i].name, flag) == 0)
3870 return flags[i].value;
3875 static void print_str_to_seq(struct trace_seq *s, const char *format,
3876 int len_arg, const char *str)
3879 trace_seq_printf(s, format, len_arg, str);
3881 trace_seq_printf(s, format, str);
3884 static void print_bitmask_to_seq(struct tep_handle *tep,
3885 struct trace_seq *s, const char *format,
3886 int len_arg, const void *data, int size)
3888 int nr_bits = size * 8;
3889 int str_size = (nr_bits + 3) / 4;
3897 * The kernel likes to put in commas every 32 bits, we
3900 str_size += (nr_bits - 1) / 32;
3902 str = malloc(str_size + 1);
3904 do_warning("%s: not enough memory!", __func__);
3909 /* Start out with -2 for the two chars per byte */
3910 for (i = str_size - 2; i >= 0; i -= 2) {
3912 * data points to a bit mask of size bytes.
3913 * In the kernel, this is an array of long words, thus
3914 * endianness is very important.
3916 if (tep->file_bigendian)
3917 index = size - (len + 1);
3921 snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
3922 memcpy(str + i, buf, 2);
3924 if (!(len & 3) && i > 0) {
3931 trace_seq_printf(s, format, len_arg, str);
3933 trace_seq_printf(s, format, str);
3938 static void print_str_arg(struct trace_seq *s, void *data, int size,
3939 struct tep_event *event, const char *format,
3940 int len_arg, struct tep_print_arg *arg)
3942 struct tep_handle *tep = event->tep;
3943 struct tep_print_flag_sym *flag;
3944 struct tep_format_field *field;
3945 struct printk_map *printk;
3946 long long val, fval;
3947 unsigned long long addr;
3953 switch (arg->type) {
3954 case TEP_PRINT_NULL:
3957 case TEP_PRINT_ATOM:
3958 print_str_to_seq(s, format, len_arg, arg->atom.atom);
3960 case TEP_PRINT_FIELD:
3961 field = arg->field.field;
3963 field = tep_find_any_field(event, arg->field.name);
3965 str = arg->field.name;
3966 goto out_warning_field;
3968 arg->field.field = field;
3970 /* Zero sized fields, mean the rest of the data */
3971 len = field->size ? : size - field->offset;
3974 * Some events pass in pointers. If this is not an array
3975 * and the size is the same as long_size, assume that it
3978 if (!(field->flags & TEP_FIELD_IS_ARRAY) &&
3979 field->size == tep->long_size) {
3981 /* Handle heterogeneous recording and processing
3985 * Traces recorded on 32-bit devices (32-bit
3986 * addressing) and processed on 64-bit devices:
3987 * In this case, only 32 bits should be read.
3990 * Traces recorded on 64 bit devices and processed
3991 * on 32-bit devices:
3992 * In this case, 64 bits must be read.
3994 addr = (tep->long_size == 8) ?
3995 *(unsigned long long *)(data + field->offset) :
3996 (unsigned long long)*(unsigned int *)(data + field->offset);
3998 /* Check if it matches a print format */
3999 printk = find_printk(tep, addr);
4001 trace_seq_puts(s, printk->printk);
4003 trace_seq_printf(s, "%llx", addr);
4006 str = malloc(len + 1);
4008 do_warning_event(event, "%s: not enough memory!",
4012 memcpy(str, data + field->offset, len);
4014 print_str_to_seq(s, format, len_arg, str);
4017 case TEP_PRINT_FLAGS:
4018 val = eval_num_arg(data, size, event, arg->flags.field);
4020 for (flag = arg->flags.flags; flag; flag = flag->next) {
4021 fval = eval_flag(flag->value);
4022 if (!val && fval < 0) {
4023 print_str_to_seq(s, format, len_arg, flag->str);
4026 if (fval > 0 && (val & fval) == fval) {
4027 if (print && arg->flags.delim)
4028 trace_seq_puts(s, arg->flags.delim);
4029 print_str_to_seq(s, format, len_arg, flag->str);
4035 if (print && arg->flags.delim)
4036 trace_seq_puts(s, arg->flags.delim);
4037 trace_seq_printf(s, "0x%llx", val);
4040 case TEP_PRINT_SYMBOL:
4041 val = eval_num_arg(data, size, event, arg->symbol.field);
4042 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
4043 fval = eval_flag(flag->value);
4045 print_str_to_seq(s, format, len_arg, flag->str);
4050 trace_seq_printf(s, "0x%llx", val);
4053 case TEP_PRINT_HEX_STR:
4054 if (arg->hex.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
4055 unsigned long offset;
4056 offset = tep_read_number(tep,
4057 data + arg->hex.field->dynarray.field->offset,
4058 arg->hex.field->dynarray.field->size);
4059 hex = data + (offset & 0xffff);
4061 field = arg->hex.field->field.field;
4063 str = arg->hex.field->field.name;
4064 field = tep_find_any_field(event, str);
4066 goto out_warning_field;
4067 arg->hex.field->field.field = field;
4069 hex = data + field->offset;
4071 len = eval_num_arg(data, size, event, arg->hex.size);
4072 for (i = 0; i < len; i++) {
4073 if (i && arg->type == TEP_PRINT_HEX)
4074 trace_seq_putc(s, ' ');
4075 trace_seq_printf(s, "%02x", hex[i]);
4079 case TEP_PRINT_INT_ARRAY: {
4083 if (arg->int_array.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
4084 unsigned long offset;
4085 struct tep_format_field *field =
4086 arg->int_array.field->dynarray.field;
4087 offset = tep_read_number(tep,
4088 data + field->offset,
4090 num = data + (offset & 0xffff);
4092 field = arg->int_array.field->field.field;
4094 str = arg->int_array.field->field.name;
4095 field = tep_find_any_field(event, str);
4097 goto out_warning_field;
4098 arg->int_array.field->field.field = field;
4100 num = data + field->offset;
4102 len = eval_num_arg(data, size, event, arg->int_array.count);
4103 el_size = eval_num_arg(data, size, event,
4104 arg->int_array.el_size);
4105 for (i = 0; i < len; i++) {
4107 trace_seq_putc(s, ' ');
4110 trace_seq_printf(s, "%u", *(uint8_t *)num);
4111 } else if (el_size == 2) {
4112 trace_seq_printf(s, "%u", *(uint16_t *)num);
4113 } else if (el_size == 4) {
4114 trace_seq_printf(s, "%u", *(uint32_t *)num);
4115 } else if (el_size == 8) {
4116 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4118 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4119 el_size, *(uint8_t *)num);
4127 case TEP_PRINT_TYPE:
4129 case TEP_PRINT_STRING: {
4132 if (arg->string.offset == -1) {
4133 struct tep_format_field *f;
4135 f = tep_find_any_field(event, arg->string.string);
4136 arg->string.offset = f->offset;
4138 str_offset = tep_data2host4(tep, *(unsigned int *)(data + arg->string.offset));
4139 str_offset &= 0xffff;
4140 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4143 case TEP_PRINT_BSTRING:
4144 print_str_to_seq(s, format, len_arg, arg->string.string);
4146 case TEP_PRINT_BITMASK: {
4150 if (arg->bitmask.offset == -1) {
4151 struct tep_format_field *f;
4153 f = tep_find_any_field(event, arg->bitmask.bitmask);
4154 arg->bitmask.offset = f->offset;
4156 bitmask_offset = tep_data2host4(tep, *(unsigned int *)(data + arg->bitmask.offset));
4157 bitmask_size = bitmask_offset >> 16;
4158 bitmask_offset &= 0xffff;
4159 print_bitmask_to_seq(tep, s, format, len_arg,
4160 data + bitmask_offset, bitmask_size);
4165 * The only op for string should be ? :
4167 if (arg->op.op[0] != '?')
4169 val = eval_num_arg(data, size, event, arg->op.left);
4171 print_str_arg(s, data, size, event,
4172 format, len_arg, arg->op.right->op.left);
4174 print_str_arg(s, data, size, event,
4175 format, len_arg, arg->op.right->op.right);
4177 case TEP_PRINT_FUNC:
4178 process_defined_func(s, data, size, event, arg);
4188 do_warning_event(event, "%s: field %s not found",
4189 __func__, arg->field.name);
4192 static unsigned long long
4193 process_defined_func(struct trace_seq *s, void *data, int size,
4194 struct tep_event *event, struct tep_print_arg *arg)
4196 struct tep_function_handler *func_handle = arg->func.func;
4197 struct func_params *param;
4198 unsigned long long *args;
4199 unsigned long long ret;
4200 struct tep_print_arg *farg;
4201 struct trace_seq str;
4203 struct save_str *next;
4205 } *strings = NULL, *string;
4208 if (!func_handle->nr_args) {
4209 ret = (*func_handle->func)(s, NULL);
4213 farg = arg->func.args;
4214 param = func_handle->params;
4217 args = malloc(sizeof(*args) * func_handle->nr_args);
4221 for (i = 0; i < func_handle->nr_args; i++) {
4222 switch (param->type) {
4223 case TEP_FUNC_ARG_INT:
4224 case TEP_FUNC_ARG_LONG:
4225 case TEP_FUNC_ARG_PTR:
4226 args[i] = eval_num_arg(data, size, event, farg);
4228 case TEP_FUNC_ARG_STRING:
4229 trace_seq_init(&str);
4230 print_str_arg(&str, data, size, event, "%s", -1, farg);
4231 trace_seq_terminate(&str);
4232 string = malloc(sizeof(*string));
4234 do_warning_event(event, "%s(%d): malloc str",
4235 __func__, __LINE__);
4238 string->next = strings;
4239 string->str = strdup(str.buffer);
4242 do_warning_event(event, "%s(%d): malloc str",
4243 __func__, __LINE__);
4246 args[i] = (uintptr_t)string->str;
4248 trace_seq_destroy(&str);
4252 * Something went totally wrong, this is not
4253 * an input error, something in this code broke.
4255 do_warning_event(event, "Unexpected end of arguments\n");
4259 param = param->next;
4262 ret = (*func_handle->func)(s, args);
4267 strings = string->next;
4273 /* TBD : handle return type here */
4277 static void free_args(struct tep_print_arg *args)
4279 struct tep_print_arg *next;
4289 static struct tep_print_arg *make_bprint_args(char *fmt, void *data, int size, struct tep_event *event)
4291 struct tep_handle *tep = event->tep;
4292 struct tep_format_field *field, *ip_field;
4293 struct tep_print_arg *args, *arg, **next;
4294 unsigned long long ip, val;
4299 field = tep->bprint_buf_field;
4300 ip_field = tep->bprint_ip_field;
4303 field = tep_find_field(event, "buf");
4305 do_warning_event(event, "can't find buffer field for binary printk");
4308 ip_field = tep_find_field(event, "ip");
4310 do_warning_event(event, "can't find ip field for binary printk");
4313 tep->bprint_buf_field = field;
4314 tep->bprint_ip_field = ip_field;
4317 ip = tep_read_number(tep, data + ip_field->offset, ip_field->size);
4320 * The first arg is the IP pointer.
4324 do_warning_event(event, "%s(%d): not enough memory!",
4325 __func__, __LINE__);
4332 arg->type = TEP_PRINT_ATOM;
4334 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4337 /* skip the first "%ps: " */
4338 for (ptr = fmt + 5, bptr = data + field->offset;
4339 bptr < data + size && *ptr; ptr++) {
4364 if (isalnum(ptr[1])) {
4366 /* Check for special pointers */
4376 * Older kernels do not process
4377 * dereferenced pointers.
4378 * Only process if the pointer
4379 * value is a printable.
4381 if (isprint(*(char *)bptr))
4382 goto process_string;
4395 vsize = tep->long_size;
4409 /* the pointers are always 4 bytes aligned */
4410 bptr = (void *)(((unsigned long)bptr + 3) &
4412 val = tep_read_number(tep, bptr, vsize);
4416 do_warning_event(event, "%s(%d): not enough memory!",
4417 __func__, __LINE__);
4421 arg->type = TEP_PRINT_ATOM;
4422 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4429 * The '*' case means that an arg is used as the length.
4430 * We need to continue to figure out for what.
4440 do_warning_event(event, "%s(%d): not enough memory!",
4441 __func__, __LINE__);
4445 arg->type = TEP_PRINT_BSTRING;
4446 arg->string.string = strdup(bptr);
4447 if (!arg->string.string)
4449 bptr += strlen(bptr) + 1;
4466 get_bprint_format(void *data, int size __maybe_unused,
4467 struct tep_event *event)
4469 struct tep_handle *tep = event->tep;
4470 unsigned long long addr;
4471 struct tep_format_field *field;
4472 struct printk_map *printk;
4475 field = tep->bprint_fmt_field;
4478 field = tep_find_field(event, "fmt");
4480 do_warning_event(event, "can't find format field for binary printk");
4483 tep->bprint_fmt_field = field;
4486 addr = tep_read_number(tep, data + field->offset, field->size);
4488 printk = find_printk(tep, addr);
4490 if (asprintf(&format, "%%pf: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4495 if (asprintf(&format, "%s: %s", "%pf", printk->printk) < 0)
4501 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4502 struct tep_event *event, struct tep_print_arg *arg)
4505 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4507 if (arg->type == TEP_PRINT_FUNC) {
4508 process_defined_func(s, data, size, event, arg);
4512 if (arg->type != TEP_PRINT_FIELD) {
4513 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4519 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4520 if (!arg->field.field) {
4522 tep_find_any_field(event, arg->field.name);
4523 if (!arg->field.field) {
4524 do_warning_event(event, "%s: field %s not found",
4525 __func__, arg->field.name);
4529 if (arg->field.field->size != 6) {
4530 trace_seq_printf(s, "INVALIDMAC");
4533 buf = data + arg->field.field->offset;
4534 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4537 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4542 fmt = "%03d.%03d.%03d.%03d";
4544 fmt = "%d.%d.%d.%d";
4546 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4549 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4551 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4552 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4555 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4557 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4560 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4563 unsigned char zerolength[8];
4568 bool needcolon = false;
4570 struct in6_addr in6;
4572 memcpy(&in6, addr, sizeof(struct in6_addr));
4574 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4576 memset(zerolength, 0, sizeof(zerolength));
4583 /* find position of longest 0 run */
4584 for (i = 0; i < range; i++) {
4585 for (j = i; j < range; j++) {
4586 if (in6.s6_addr16[j] != 0)
4591 for (i = 0; i < range; i++) {
4592 if (zerolength[i] > longest) {
4593 longest = zerolength[i];
4597 if (longest == 1) /* don't compress a single 0 */
4601 for (i = 0; i < range; i++) {
4602 if (i == colonpos) {
4603 if (needcolon || i == 0)
4604 trace_seq_printf(s, ":");
4605 trace_seq_printf(s, ":");
4611 trace_seq_printf(s, ":");
4614 /* hex u16 without leading 0s */
4615 word = ntohs(in6.s6_addr16[i]);
4619 trace_seq_printf(s, "%x%02x", hi, lo);
4621 trace_seq_printf(s, "%x", lo);
4628 trace_seq_printf(s, ":");
4629 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4635 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4639 for (j = 0; j < 16; j += 2) {
4640 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4641 if (i == 'I' && j < 14)
4642 trace_seq_printf(s, ":");
4647 * %pi4 print an IPv4 address with leading zeros
4648 * %pI4 print an IPv4 address without leading zeros
4649 * %pi6 print an IPv6 address without colons
4650 * %pI6 print an IPv6 address with colons
4651 * %pI6c print an IPv6 address in compressed form with colons
4652 * %pISpc print an IP address based on sockaddr; p adds port.
4654 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4655 void *data, int size, struct tep_event *event,
4656 struct tep_print_arg *arg)
4660 if (arg->type == TEP_PRINT_FUNC) {
4661 process_defined_func(s, data, size, event, arg);
4665 if (arg->type != TEP_PRINT_FIELD) {
4666 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4670 if (!arg->field.field) {
4672 tep_find_any_field(event, arg->field.name);
4673 if (!arg->field.field) {
4674 do_warning("%s: field %s not found",
4675 __func__, arg->field.name);
4680 buf = data + arg->field.field->offset;
4682 if (arg->field.field->size != 4) {
4683 trace_seq_printf(s, "INVALIDIPv4");
4686 print_ip4_addr(s, i, buf);
4691 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4692 void *data, int size, struct tep_event *event,
4693 struct tep_print_arg *arg)
4700 if (i == 'I' && *ptr == 'c') {
4706 if (arg->type == TEP_PRINT_FUNC) {
4707 process_defined_func(s, data, size, event, arg);
4711 if (arg->type != TEP_PRINT_FIELD) {
4712 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4716 if (!arg->field.field) {
4718 tep_find_any_field(event, arg->field.name);
4719 if (!arg->field.field) {
4720 do_warning("%s: field %s not found",
4721 __func__, arg->field.name);
4726 buf = data + arg->field.field->offset;
4728 if (arg->field.field->size != 16) {
4729 trace_seq_printf(s, "INVALIDIPv6");
4734 print_ip6c_addr(s, buf);
4736 print_ip6_addr(s, i, buf);
4741 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4742 void *data, int size, struct tep_event *event,
4743 struct tep_print_arg *arg)
4745 char have_c = 0, have_p = 0;
4747 struct sockaddr_storage *sa;
4764 if (arg->type == TEP_PRINT_FUNC) {
4765 process_defined_func(s, data, size, event, arg);
4769 if (arg->type != TEP_PRINT_FIELD) {
4770 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4774 if (!arg->field.field) {
4776 tep_find_any_field(event, arg->field.name);
4777 if (!arg->field.field) {
4778 do_warning("%s: field %s not found",
4779 __func__, arg->field.name);
4784 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4786 if (sa->ss_family == AF_INET) {
4787 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4789 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4790 trace_seq_printf(s, "INVALIDIPv4");
4794 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4796 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4799 } else if (sa->ss_family == AF_INET6) {
4800 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4802 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4803 trace_seq_printf(s, "INVALIDIPv6");
4808 trace_seq_printf(s, "[");
4810 buf = (unsigned char *) &sa6->sin6_addr;
4812 print_ip6c_addr(s, buf);
4814 print_ip6_addr(s, i, buf);
4817 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4823 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4824 void *data, int size, struct tep_event *event,
4825 struct tep_print_arg *arg)
4827 char i = *ptr; /* 'i' or 'I' */
4840 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4843 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4846 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4855 static int is_printable_array(char *p, unsigned int len)
4859 for (i = 0; i < len && p[i]; i++)
4860 if (!isprint(p[i]) && !isspace(p[i]))
4865 void tep_print_field(struct trace_seq *s, void *data,
4866 struct tep_format_field *field)
4868 unsigned long long val;
4869 unsigned int offset, len, i;
4870 struct tep_handle *tep = field->event->tep;
4872 if (field->flags & TEP_FIELD_IS_ARRAY) {
4873 offset = field->offset;
4875 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
4876 val = tep_read_number(tep, data + offset, len);
4881 if (field->flags & TEP_FIELD_IS_STRING &&
4882 is_printable_array(data + offset, len)) {
4883 trace_seq_printf(s, "%s", (char *)data + offset);
4885 trace_seq_puts(s, "ARRAY[");
4886 for (i = 0; i < len; i++) {
4888 trace_seq_puts(s, ", ");
4889 trace_seq_printf(s, "%02x",
4890 *((unsigned char *)data + offset + i));
4892 trace_seq_putc(s, ']');
4893 field->flags &= ~TEP_FIELD_IS_STRING;
4896 val = tep_read_number(tep, data + field->offset,
4898 if (field->flags & TEP_FIELD_IS_POINTER) {
4899 trace_seq_printf(s, "0x%llx", val);
4900 } else if (field->flags & TEP_FIELD_IS_SIGNED) {
4901 switch (field->size) {
4904 * If field is long then print it in hex.
4905 * A long usually stores pointers.
4907 if (field->flags & TEP_FIELD_IS_LONG)
4908 trace_seq_printf(s, "0x%x", (int)val);
4910 trace_seq_printf(s, "%d", (int)val);
4913 trace_seq_printf(s, "%2d", (short)val);
4916 trace_seq_printf(s, "%1d", (char)val);
4919 trace_seq_printf(s, "%lld", val);
4922 if (field->flags & TEP_FIELD_IS_LONG)
4923 trace_seq_printf(s, "0x%llx", val);
4925 trace_seq_printf(s, "%llu", val);
4930 void tep_print_fields(struct trace_seq *s, void *data,
4931 int size __maybe_unused, struct tep_event *event)
4933 struct tep_format_field *field;
4935 field = event->format.fields;
4937 trace_seq_printf(s, " %s=", field->name);
4938 tep_print_field(s, data, field);
4939 field = field->next;
4943 static void pretty_print(struct trace_seq *s, void *data, int size, struct tep_event *event)
4945 struct tep_handle *tep = event->tep;
4946 struct tep_print_fmt *print_fmt = &event->print_fmt;
4947 struct tep_print_arg *arg = print_fmt->args;
4948 struct tep_print_arg *args = NULL;
4949 const char *ptr = print_fmt->format;
4950 unsigned long long val;
4951 struct func_map *func;
4952 const char *saveptr;
4954 char *bprint_fmt = NULL;
4962 if (event->flags & TEP_EVENT_FL_FAILED) {
4963 trace_seq_printf(s, "[FAILED TO PARSE]");
4964 tep_print_fields(s, data, size, event);
4968 if (event->flags & TEP_EVENT_FL_ISBPRINT) {
4969 bprint_fmt = get_bprint_format(data, size, event);
4970 args = make_bprint_args(bprint_fmt, data, size, event);
4975 for (; *ptr; ptr++) {
4981 trace_seq_putc(s, '\n');
4984 trace_seq_putc(s, '\t');
4987 trace_seq_putc(s, '\r');
4990 trace_seq_putc(s, '\\');
4993 trace_seq_putc(s, *ptr);
4997 } else if (*ptr == '%') {
5005 trace_seq_putc(s, '%');
5008 /* FIXME: need to handle properly */
5020 /* The argument is the length. */
5022 do_warning_event(event, "no argument match");
5023 event->flags |= TEP_EVENT_FL_FAILED;
5026 len_arg = eval_num_arg(data, size, event, arg);
5037 if (tep->long_size == 4)
5042 if (isalnum(ptr[1]))
5045 if (arg->type == TEP_PRINT_BSTRING) {
5046 trace_seq_puts(s, arg->string.string);
5051 if (*ptr == 'F' || *ptr == 'f' ||
5052 *ptr == 'S' || *ptr == 's') {
5054 } else if (*ptr == 'M' || *ptr == 'm') {
5055 print_mac_arg(s, *ptr, data, size, event, arg);
5058 } else if (*ptr == 'I' || *ptr == 'i') {
5061 n = print_ip_arg(s, ptr, data, size, event, arg);
5076 do_warning_event(event, "no argument match");
5077 event->flags |= TEP_EVENT_FL_FAILED;
5081 len = ((unsigned long)ptr + 1) -
5082 (unsigned long)saveptr;
5084 /* should never happen */
5086 do_warning_event(event, "bad format!");
5087 event->flags |= TEP_EVENT_FL_FAILED;
5091 memcpy(format, saveptr, len);
5094 val = eval_num_arg(data, size, event, arg);
5098 func = find_func(tep, val);
5100 trace_seq_puts(s, func->func);
5101 if (show_func == 'F')
5108 if (tep->long_size == 8 && ls == 1 &&
5109 sizeof(long) != 8) {
5112 /* make %l into %ll */
5113 if (ls == 1 && (p = strchr(format, 'l')))
5114 memmove(p+1, p, strlen(p)+1);
5115 else if (strcmp(format, "%p") == 0)
5116 strcpy(format, "0x%llx");
5122 trace_seq_printf(s, format, len_arg, (char)val);
5124 trace_seq_printf(s, format, (char)val);
5128 trace_seq_printf(s, format, len_arg, (short)val);
5130 trace_seq_printf(s, format, (short)val);
5134 trace_seq_printf(s, format, len_arg, (int)val);
5136 trace_seq_printf(s, format, (int)val);
5140 trace_seq_printf(s, format, len_arg, (long)val);
5142 trace_seq_printf(s, format, (long)val);
5146 trace_seq_printf(s, format, len_arg,
5149 trace_seq_printf(s, format, (long long)val);
5152 do_warning_event(event, "bad count (%d)", ls);
5153 event->flags |= TEP_EVENT_FL_FAILED;
5158 do_warning_event(event, "no matching argument");
5159 event->flags |= TEP_EVENT_FL_FAILED;
5163 len = ((unsigned long)ptr + 1) -
5164 (unsigned long)saveptr;
5166 /* should never happen */
5168 do_warning_event(event, "bad format!");
5169 event->flags |= TEP_EVENT_FL_FAILED;
5173 memcpy(format, saveptr, len);
5177 /* Use helper trace_seq */
5179 print_str_arg(&p, data, size, event,
5180 format, len_arg, arg);
5181 trace_seq_terminate(&p);
5182 trace_seq_puts(s, p.buffer);
5183 trace_seq_destroy(&p);
5187 trace_seq_printf(s, ">%c<", *ptr);
5191 trace_seq_putc(s, *ptr);
5194 if (event->flags & TEP_EVENT_FL_FAILED) {
5196 trace_seq_printf(s, "[FAILED TO PARSE]");
5206 * This parses out the Latency format (interrupts disabled,
5207 * need rescheduling, in hard/soft interrupt, preempt count
5208 * and lock depth) and places it into the trace_seq.
5210 static void data_latency_format(struct tep_handle *tep, struct trace_seq *s,
5211 char *format, struct tep_record *record)
5213 static int check_lock_depth = 1;
5214 static int check_migrate_disable = 1;
5215 static int lock_depth_exists;
5216 static int migrate_disable_exists;
5217 unsigned int lat_flags;
5218 struct trace_seq sq;
5221 int migrate_disable = 0;
5224 void *data = record->data;
5226 trace_seq_init(&sq);
5227 lat_flags = parse_common_flags(tep, data);
5228 pc = parse_common_pc(tep, data);
5229 /* lock_depth may not always exist */
5230 if (lock_depth_exists)
5231 lock_depth = parse_common_lock_depth(tep, data);
5232 else if (check_lock_depth) {
5233 lock_depth = parse_common_lock_depth(tep, data);
5235 check_lock_depth = 0;
5237 lock_depth_exists = 1;
5240 /* migrate_disable may not always exist */
5241 if (migrate_disable_exists)
5242 migrate_disable = parse_common_migrate_disable(tep, data);
5243 else if (check_migrate_disable) {
5244 migrate_disable = parse_common_migrate_disable(tep, data);
5245 if (migrate_disable < 0)
5246 check_migrate_disable = 0;
5248 migrate_disable_exists = 1;
5251 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5252 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5254 trace_seq_printf(&sq, "%c%c%c",
5255 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5256 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5258 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5260 (hardirq && softirq) ? 'H' :
5261 hardirq ? 'h' : softirq ? 's' : '.');
5264 trace_seq_printf(&sq, "%x", pc);
5266 trace_seq_printf(&sq, ".");
5268 if (migrate_disable_exists) {
5269 if (migrate_disable < 0)
5270 trace_seq_printf(&sq, ".");
5272 trace_seq_printf(&sq, "%d", migrate_disable);
5275 if (lock_depth_exists) {
5277 trace_seq_printf(&sq, ".");
5279 trace_seq_printf(&sq, "%d", lock_depth);
5282 if (sq.state == TRACE_SEQ__MEM_ALLOC_FAILED) {
5283 s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
5287 trace_seq_terminate(&sq);
5288 trace_seq_puts(s, sq.buffer);
5289 trace_seq_destroy(&sq);
5290 trace_seq_terminate(s);
5294 * tep_data_type - parse out the given event type
5295 * @tep: a handle to the trace event parser context
5296 * @rec: the record to read from
5298 * This returns the event id from the @rec.
5300 int tep_data_type(struct tep_handle *tep, struct tep_record *rec)
5302 return trace_parse_common_type(tep, rec->data);
5306 * tep_data_pid - parse the PID from record
5307 * @tep: a handle to the trace event parser context
5308 * @rec: the record to parse
5310 * This returns the PID from a record.
5312 int tep_data_pid(struct tep_handle *tep, struct tep_record *rec)
5314 return parse_common_pid(tep, rec->data);
5318 * tep_data_preempt_count - parse the preempt count from the record
5319 * @tep: a handle to the trace event parser context
5320 * @rec: the record to parse
5322 * This returns the preempt count from a record.
5324 int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec)
5326 return parse_common_pc(tep, rec->data);
5330 * tep_data_flags - parse the latency flags from the record
5331 * @tep: a handle to the trace event parser context
5332 * @rec: the record to parse
5334 * This returns the latency flags from a record.
5336 * Use trace_flag_type enum for the flags (see event-parse.h).
5338 int tep_data_flags(struct tep_handle *tep, struct tep_record *rec)
5340 return parse_common_flags(tep, rec->data);
5344 * tep_data_comm_from_pid - return the command line from PID
5345 * @tep: a handle to the trace event parser context
5346 * @pid: the PID of the task to search for
5348 * This returns a pointer to the command line that has the given
5351 const char *tep_data_comm_from_pid(struct tep_handle *tep, int pid)
5355 comm = find_cmdline(tep, pid);
5359 static struct tep_cmdline *
5360 pid_from_cmdlist(struct tep_handle *tep, const char *comm, struct tep_cmdline *next)
5362 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5365 cmdlist = cmdlist->next;
5367 cmdlist = tep->cmdlist;
5369 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5370 cmdlist = cmdlist->next;
5372 return (struct tep_cmdline *)cmdlist;
5376 * tep_data_pid_from_comm - return the pid from a given comm
5377 * @tep: a handle to the trace event parser context
5378 * @comm: the cmdline to find the pid from
5379 * @next: the cmdline structure to find the next comm
5381 * This returns the cmdline structure that holds a pid for a given
5382 * comm, or NULL if none found. As there may be more than one pid for
5383 * a given comm, the result of this call can be passed back into
5384 * a recurring call in the @next parameter, and then it will find the
5386 * Also, it does a linear search, so it may be slow.
5388 struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *tep, const char *comm,
5389 struct tep_cmdline *next)
5391 struct tep_cmdline *cmdline;
5394 * If the cmdlines have not been converted yet, then use
5398 return pid_from_cmdlist(tep, comm, next);
5402 * The next pointer could have been still from
5403 * a previous call before cmdlines were created
5405 if (next < tep->cmdlines ||
5406 next >= tep->cmdlines + tep->cmdline_count)
5413 cmdline = tep->cmdlines;
5415 while (cmdline < tep->cmdlines + tep->cmdline_count) {
5416 if (strcmp(cmdline->comm, comm) == 0)
5424 * tep_cmdline_pid - return the pid associated to a given cmdline
5425 * @tep: a handle to the trace event parser context
5426 * @cmdline: The cmdline structure to get the pid from
5428 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5431 int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline)
5433 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5439 * If cmdlines have not been created yet, or cmdline is
5440 * not part of the array, then treat it as a cmdlist instead.
5442 if (!tep->cmdlines ||
5443 cmdline < tep->cmdlines ||
5444 cmdline >= tep->cmdlines + tep->cmdline_count)
5445 return cmdlist->pid;
5447 return cmdline->pid;
5451 * This parses the raw @data using the given @event information and
5452 * writes the print format into the trace_seq.
5454 static void print_event_info(struct trace_seq *s, char *format, bool raw,
5455 struct tep_event *event, struct tep_record *record)
5457 int print_pretty = 1;
5459 if (raw || (event->flags & TEP_EVENT_FL_PRINTRAW))
5460 tep_print_fields(s, record->data, record->size, event);
5463 if (event->handler && !(event->flags & TEP_EVENT_FL_NOHANDLE))
5464 print_pretty = event->handler(s, record, event,
5468 pretty_print(s, record->data, record->size, event);
5471 trace_seq_terminate(s);
5475 * tep_find_event_by_record - return the event from a given record
5476 * @tep: a handle to the trace event parser context
5477 * @record: The record to get the event from
5479 * Returns the associated event for a given record, or NULL if non is
5483 tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record)
5487 if (record->size < 0) {
5488 do_warning("ug! negative record size %d", record->size);
5492 type = trace_parse_common_type(tep, record->data);
5494 return tep_find_event(tep, type);
5498 * Writes the timestamp of the record into @s. Time divisor and precision can be
5499 * specified as part of printf @format string. Example:
5500 * "%3.1000d" - divide the time by 1000 and print the first 3 digits
5501 * before the dot. Thus, the timestamp "123456000" will be printed as
5504 static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
5505 char *format, struct tep_event *event,
5506 struct tep_record *record)
5508 unsigned long long time;
5514 if (isdigit(*(format + 1)))
5515 prec = atoi(format + 1);
5516 divstr = strchr(format, '.');
5517 if (divstr && isdigit(*(divstr + 1)))
5518 div = atoi(divstr + 1);
5526 if (p10 > 1 && p10 < time)
5527 trace_seq_printf(s, "%5llu.%0*llu", time / p10, prec, time % p10);
5529 trace_seq_printf(s, "%12llu\n", time);
5532 struct print_event_type {
5541 static void print_string(struct tep_handle *tep, struct trace_seq *s,
5542 struct tep_record *record, struct tep_event *event,
5543 const char *arg, struct print_event_type *type)
5548 if (strncmp(arg, TEP_PRINT_LATENCY, strlen(TEP_PRINT_LATENCY)) == 0) {
5549 data_latency_format(tep, s, type->format, record);
5550 } else if (strncmp(arg, TEP_PRINT_COMM, strlen(TEP_PRINT_COMM)) == 0) {
5551 pid = parse_common_pid(tep, record->data);
5552 comm = find_cmdline(tep, pid);
5553 trace_seq_printf(s, type->format, comm);
5554 } else if (strncmp(arg, TEP_PRINT_INFO_RAW, strlen(TEP_PRINT_INFO_RAW)) == 0) {
5555 print_event_info(s, type->format, true, event, record);
5556 } else if (strncmp(arg, TEP_PRINT_INFO, strlen(TEP_PRINT_INFO)) == 0) {
5557 print_event_info(s, type->format, false, event, record);
5558 } else if (strncmp(arg, TEP_PRINT_NAME, strlen(TEP_PRINT_NAME)) == 0) {
5559 trace_seq_printf(s, type->format, event->name);
5561 trace_seq_printf(s, "[UNKNOWN TEP TYPE %s]", arg);
5566 static void print_int(struct tep_handle *tep, struct trace_seq *s,
5567 struct tep_record *record, struct tep_event *event,
5568 int arg, struct print_event_type *type)
5574 param = record->cpu;
5577 param = parse_common_pid(tep, record->data);
5579 case TEP_PRINT_TIME:
5580 return print_event_time(tep, s, type->format, event, record);
5584 trace_seq_printf(s, type->format, param);
5587 static int tep_print_event_param_type(char *format,
5588 struct print_event_type *type)
5590 char *str = format + 1;
5593 type->type = EVENT_TYPE_UNKNOWN;
5602 type->type = EVENT_TYPE_INT;
5605 type->type = EVENT_TYPE_STRING;
5610 if (type->type != EVENT_TYPE_UNKNOWN)
5613 memset(type->format, 0, 32);
5614 memcpy(type->format, format, i < 32 ? i : 31);
5619 * tep_print_event - Write various event information
5620 * @tep: a handle to the trace event parser context
5621 * @s: the trace_seq to write to
5622 * @record: The record to get the event from
5623 * @format: a printf format string. Supported event fileds:
5624 * TEP_PRINT_PID, "%d" - event PID
5625 * TEP_PRINT_CPU, "%d" - event CPU
5626 * TEP_PRINT_COMM, "%s" - event command string
5627 * TEP_PRINT_NAME, "%s" - event name
5628 * TEP_PRINT_LATENCY, "%s" - event latency
5629 * TEP_PRINT_TIME, %d - event time stamp. A divisor and precision
5630 * can be specified as part of this format string:
5631 * "%precision.divisord". Example:
5632 * "%3.1000d" - divide the time by 1000 and print the first
5633 * 3 digits before the dot. Thus, the time stamp
5634 * "123456000" will be printed as "123.456"
5635 * TEP_PRINT_INFO, "%s" - event information. If any width is specified in
5636 * the format string, the event information will be printed
5638 * Writes the specified event information into @s.
5640 void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
5641 struct tep_record *record, const char *fmt, ...)
5643 struct print_event_type type;
5644 char *format = strdup(fmt);
5645 char *current = format;
5649 struct tep_event *event;
5654 event = tep_find_event_by_record(tep, record);
5655 va_start(args, fmt);
5657 current = strchr(str, '%');
5659 trace_seq_puts(s, str);
5662 memset(&type, 0, sizeof(type));
5663 offset = tep_print_event_param_type(current, &type);
5665 trace_seq_puts(s, str);
5667 switch (type.type) {
5668 case EVENT_TYPE_STRING:
5669 print_string(tep, s, record, event,
5670 va_arg(args, char*), &type);
5672 case EVENT_TYPE_INT:
5673 print_int(tep, s, record, event,
5674 va_arg(args, int), &type);
5676 case EVENT_TYPE_UNKNOWN:
5678 trace_seq_printf(s, "[UNKNOWN TYPE]");
5688 static int events_id_cmp(const void *a, const void *b)
5690 struct tep_event * const * ea = a;
5691 struct tep_event * const * eb = b;
5693 if ((*ea)->id < (*eb)->id)
5696 if ((*ea)->id > (*eb)->id)
5702 static int events_name_cmp(const void *a, const void *b)
5704 struct tep_event * const * ea = a;
5705 struct tep_event * const * eb = b;
5708 res = strcmp((*ea)->name, (*eb)->name);
5712 res = strcmp((*ea)->system, (*eb)->system);
5716 return events_id_cmp(a, b);
5719 static int events_system_cmp(const void *a, const void *b)
5721 struct tep_event * const * ea = a;
5722 struct tep_event * const * eb = b;
5725 res = strcmp((*ea)->system, (*eb)->system);
5729 res = strcmp((*ea)->name, (*eb)->name);
5733 return events_id_cmp(a, b);
5736 static struct tep_event **list_events_copy(struct tep_handle *tep)
5738 struct tep_event **events;
5743 events = malloc(sizeof(*events) * (tep->nr_events + 1));
5747 memcpy(events, tep->events, sizeof(*events) * tep->nr_events);
5748 events[tep->nr_events] = NULL;
5752 static void list_events_sort(struct tep_event **events, int nr_events,
5753 enum tep_event_sort_type sort_type)
5755 int (*sort)(const void *a, const void *b);
5757 switch (sort_type) {
5758 case TEP_EVENT_SORT_ID:
5759 sort = events_id_cmp;
5761 case TEP_EVENT_SORT_NAME:
5762 sort = events_name_cmp;
5764 case TEP_EVENT_SORT_SYSTEM:
5765 sort = events_system_cmp;
5772 qsort(events, nr_events, sizeof(*events), sort);
5776 * tep_list_events - Get events, sorted by given criteria.
5777 * @tep: a handle to the tep context
5778 * @sort_type: desired sort order of the events in the array
5780 * Returns an array of pointers to all events, sorted by the given
5781 * @sort_type criteria. The last element of the array is NULL. The returned
5782 * memory must not be freed, it is managed by the library.
5783 * The function is not thread safe.
5785 struct tep_event **tep_list_events(struct tep_handle *tep,
5786 enum tep_event_sort_type sort_type)
5788 struct tep_event **events;
5793 events = tep->sort_events;
5794 if (events && tep->last_type == sort_type)
5798 events = list_events_copy(tep);
5802 tep->sort_events = events;
5804 /* the internal events are sorted by id */
5805 if (sort_type == TEP_EVENT_SORT_ID) {
5806 tep->last_type = sort_type;
5811 list_events_sort(events, tep->nr_events, sort_type);
5812 tep->last_type = sort_type;
5819 * tep_list_events_copy - Thread safe version of tep_list_events()
5820 * @tep: a handle to the tep context
5821 * @sort_type: desired sort order of the events in the array
5823 * Returns an array of pointers to all events, sorted by the given
5824 * @sort_type criteria. The last element of the array is NULL. The returned
5825 * array is newly allocated inside the function and must be freed by the caller
5827 struct tep_event **tep_list_events_copy(struct tep_handle *tep,
5828 enum tep_event_sort_type sort_type)
5830 struct tep_event **events;
5835 events = list_events_copy(tep);
5839 /* the internal events are sorted by id */
5840 if (sort_type == TEP_EVENT_SORT_ID)
5843 list_events_sort(events, tep->nr_events, sort_type);
5848 static struct tep_format_field **
5849 get_event_fields(const char *type, const char *name,
5850 int count, struct tep_format_field *list)
5852 struct tep_format_field **fields;
5853 struct tep_format_field *field;
5856 fields = malloc(sizeof(*fields) * (count + 1));
5860 for (field = list; field; field = field->next) {
5861 fields[i++] = field;
5862 if (i == count + 1) {
5863 do_warning("event %s has more %s fields than specified",
5871 do_warning("event %s has less %s fields than specified",
5880 * tep_event_common_fields - return a list of common fields for an event
5881 * @event: the event to return the common fields of.
5883 * Returns an allocated array of fields. The last item in the array is NULL.
5884 * The array must be freed with free().
5886 struct tep_format_field **tep_event_common_fields(struct tep_event *event)
5888 return get_event_fields("common", event->name,
5889 event->format.nr_common,
5890 event->format.common_fields);
5894 * tep_event_fields - return a list of event specific fields for an event
5895 * @event: the event to return the fields of.
5897 * Returns an allocated array of fields. The last item in the array is NULL.
5898 * The array must be freed with free().
5900 struct tep_format_field **tep_event_fields(struct tep_event *event)
5902 return get_event_fields("event", event->name,
5903 event->format.nr_fields,
5904 event->format.fields);
5907 static void print_fields(struct trace_seq *s, struct tep_print_flag_sym *field)
5909 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5911 trace_seq_puts(s, ", ");
5912 print_fields(s, field->next);
5917 static void print_args(struct tep_print_arg *args)
5919 int print_paren = 1;
5922 switch (args->type) {
5923 case TEP_PRINT_NULL:
5926 case TEP_PRINT_ATOM:
5927 printf("%s", args->atom.atom);
5929 case TEP_PRINT_FIELD:
5930 printf("REC->%s", args->field.name);
5932 case TEP_PRINT_FLAGS:
5933 printf("__print_flags(");
5934 print_args(args->flags.field);
5935 printf(", %s, ", args->flags.delim);
5937 print_fields(&s, args->flags.flags);
5938 trace_seq_do_printf(&s);
5939 trace_seq_destroy(&s);
5942 case TEP_PRINT_SYMBOL:
5943 printf("__print_symbolic(");
5944 print_args(args->symbol.field);
5947 print_fields(&s, args->symbol.symbols);
5948 trace_seq_do_printf(&s);
5949 trace_seq_destroy(&s);
5953 printf("__print_hex(");
5954 print_args(args->hex.field);
5956 print_args(args->hex.size);
5959 case TEP_PRINT_HEX_STR:
5960 printf("__print_hex_str(");
5961 print_args(args->hex.field);
5963 print_args(args->hex.size);
5966 case TEP_PRINT_INT_ARRAY:
5967 printf("__print_array(");
5968 print_args(args->int_array.field);
5970 print_args(args->int_array.count);
5972 print_args(args->int_array.el_size);
5975 case TEP_PRINT_STRING:
5976 case TEP_PRINT_BSTRING:
5977 printf("__get_str(%s)", args->string.string);
5979 case TEP_PRINT_BITMASK:
5980 printf("__get_bitmask(%s)", args->bitmask.bitmask);
5982 case TEP_PRINT_TYPE:
5983 printf("(%s)", args->typecast.type);
5984 print_args(args->typecast.item);
5987 if (strcmp(args->op.op, ":") == 0)
5991 print_args(args->op.left);
5992 printf(" %s ", args->op.op);
5993 print_args(args->op.right);
5998 /* we should warn... */
6003 print_args(args->next);
6007 static void parse_header_field(const char *field,
6008 int *offset, int *size, int mandatory)
6010 unsigned long long save_input_buf_ptr;
6011 unsigned long long save_input_buf_siz;
6015 save_input_buf_ptr = input_buf_ptr;
6016 save_input_buf_siz = input_buf_siz;
6018 if (read_expected(TEP_EVENT_ITEM, "field") < 0)
6020 if (read_expected(TEP_EVENT_OP, ":") < 0)
6024 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6029 * If this is not a mandatory field, then test it first.
6032 if (read_expected(TEP_EVENT_ITEM, field) < 0)
6035 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6037 if (strcmp(token, field) != 0)
6042 if (read_expected(TEP_EVENT_OP, ";") < 0)
6044 if (read_expected(TEP_EVENT_ITEM, "offset") < 0)
6046 if (read_expected(TEP_EVENT_OP, ":") < 0)
6048 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6050 *offset = atoi(token);
6052 if (read_expected(TEP_EVENT_OP, ";") < 0)
6054 if (read_expected(TEP_EVENT_ITEM, "size") < 0)
6056 if (read_expected(TEP_EVENT_OP, ":") < 0)
6058 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6060 *size = atoi(token);
6062 if (read_expected(TEP_EVENT_OP, ";") < 0)
6064 type = read_token(&token);
6065 if (type != TEP_EVENT_NEWLINE) {
6066 /* newer versions of the kernel have a "signed" type */
6067 if (type != TEP_EVENT_ITEM)
6070 if (strcmp(token, "signed") != 0)
6075 if (read_expected(TEP_EVENT_OP, ":") < 0)
6078 if (read_expect_type(TEP_EVENT_ITEM, &token))
6082 if (read_expected(TEP_EVENT_OP, ";") < 0)
6085 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
6093 input_buf_ptr = save_input_buf_ptr;
6094 input_buf_siz = save_input_buf_siz;
6101 * tep_parse_header_page - parse the data stored in the header page
6102 * @tep: a handle to the trace event parser context
6103 * @buf: the buffer storing the header page format string
6104 * @size: the size of @buf
6105 * @long_size: the long size to use if there is no header
6107 * This parses the header page format for information on the
6108 * ring buffer used. The @buf should be copied from
6110 * /sys/kernel/debug/tracing/events/header_page
6112 int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
6119 * Old kernels did not have header page info.
6120 * Sorry but we just use what we find here in user space.
6122 tep->header_page_ts_size = sizeof(long long);
6123 tep->header_page_size_size = long_size;
6124 tep->header_page_data_offset = sizeof(long long) + long_size;
6125 tep->old_format = 1;
6128 init_input_buf(buf, size);
6130 parse_header_field("timestamp", &tep->header_page_ts_offset,
6131 &tep->header_page_ts_size, 1);
6132 parse_header_field("commit", &tep->header_page_size_offset,
6133 &tep->header_page_size_size, 1);
6134 parse_header_field("overwrite", &tep->header_page_overwrite,
6136 parse_header_field("data", &tep->header_page_data_offset,
6137 &tep->header_page_data_size, 1);
6142 static int event_matches(struct tep_event *event,
6143 int id, const char *sys_name,
6144 const char *event_name)
6146 if (id >= 0 && id != event->id)
6149 if (event_name && (strcmp(event_name, event->name) != 0))
6152 if (sys_name && (strcmp(sys_name, event->system) != 0))
6158 static void free_handler(struct event_handler *handle)
6160 free((void *)handle->sys_name);
6161 free((void *)handle->event_name);
6165 static int find_event_handle(struct tep_handle *tep, struct tep_event *event)
6167 struct event_handler *handle, **next;
6169 for (next = &tep->handlers; *next;
6170 next = &(*next)->next) {
6172 if (event_matches(event, handle->id,
6174 handle->event_name))
6181 pr_stat("overriding event (%d) %s:%s with new print handler",
6182 event->id, event->system, event->name);
6184 event->handler = handle->func;
6185 event->context = handle->context;
6187 *next = handle->next;
6188 free_handler(handle);
6194 * __tep_parse_format - parse the event format
6195 * @buf: the buffer storing the event format string
6196 * @size: the size of @buf
6197 * @sys: the system the event belongs to
6199 * This parses the event format and creates an event structure
6200 * to quickly parse raw data for a given event.
6202 * These files currently come from:
6204 * /sys/kernel/debug/tracing/events/.../.../format
6206 enum tep_errno __tep_parse_format(struct tep_event **eventp,
6207 struct tep_handle *tep, const char *buf,
6208 unsigned long size, const char *sys)
6210 struct tep_event *event;
6213 init_input_buf(buf, size);
6215 *eventp = event = alloc_event();
6217 return TEP_ERRNO__MEM_ALLOC_FAILED;
6219 event->name = event_read_name();
6222 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6223 goto event_alloc_failed;
6226 if (strcmp(sys, "ftrace") == 0) {
6227 event->flags |= TEP_EVENT_FL_ISFTRACE;
6229 if (strcmp(event->name, "bprint") == 0)
6230 event->flags |= TEP_EVENT_FL_ISBPRINT;
6233 event->id = event_read_id();
6234 if (event->id < 0) {
6235 ret = TEP_ERRNO__READ_ID_FAILED;
6237 * This isn't an allocation error actually.
6238 * But as the ID is critical, just bail out.
6240 goto event_alloc_failed;
6243 event->system = strdup(sys);
6244 if (!event->system) {
6245 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6246 goto event_alloc_failed;
6249 /* Add tep to event so that it can be referenced */
6252 ret = event_read_format(event);
6254 ret = TEP_ERRNO__READ_FORMAT_FAILED;
6255 goto event_parse_failed;
6259 * If the event has an override, don't print warnings if the event
6260 * print format fails to parse.
6262 if (tep && find_event_handle(tep, event))
6265 ret = event_read_print(event);
6269 ret = TEP_ERRNO__READ_PRINT_FAILED;
6270 goto event_parse_failed;
6273 if (!ret && (event->flags & TEP_EVENT_FL_ISFTRACE)) {
6274 struct tep_format_field *field;
6275 struct tep_print_arg *arg, **list;
6277 /* old ftrace had no args */
6278 list = &event->print_fmt.args;
6279 for (field = event->format.fields; field; field = field->next) {
6282 event->flags |= TEP_EVENT_FL_FAILED;
6283 return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
6285 arg->type = TEP_PRINT_FIELD;
6286 arg->field.name = strdup(field->name);
6287 if (!arg->field.name) {
6288 event->flags |= TEP_EVENT_FL_FAILED;
6290 return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
6292 arg->field.field = field;
6302 event->flags |= TEP_EVENT_FL_FAILED;
6306 free(event->system);
6313 static enum tep_errno
6314 __parse_event(struct tep_handle *tep,
6315 struct tep_event **eventp,
6316 const char *buf, unsigned long size,
6319 int ret = __tep_parse_format(eventp, tep, buf, size, sys);
6320 struct tep_event *event = *eventp;
6325 if (tep && add_event(tep, event)) {
6326 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6327 goto event_add_failed;
6330 #define PRINT_ARGS 0
6331 if (PRINT_ARGS && event->print_fmt.args)
6332 print_args(event->print_fmt.args);
6337 tep_free_event(event);
6342 * tep_parse_format - parse the event format
6343 * @tep: a handle to the trace event parser context
6344 * @eventp: returned format
6345 * @buf: the buffer storing the event format string
6346 * @size: the size of @buf
6347 * @sys: the system the event belongs to
6349 * This parses the event format and creates an event structure
6350 * to quickly parse raw data for a given event.
6352 * These files currently come from:
6354 * /sys/kernel/debug/tracing/events/.../.../format
6356 enum tep_errno tep_parse_format(struct tep_handle *tep,
6357 struct tep_event **eventp,
6359 unsigned long size, const char *sys)
6361 return __parse_event(tep, eventp, buf, size, sys);
6365 * tep_parse_event - parse the event format
6366 * @tep: a handle to the trace event parser context
6367 * @buf: the buffer storing the event format string
6368 * @size: the size of @buf
6369 * @sys: the system the event belongs to
6371 * This parses the event format and creates an event structure
6372 * to quickly parse raw data for a given event.
6374 * These files currently come from:
6376 * /sys/kernel/debug/tracing/events/.../.../format
6378 enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf,
6379 unsigned long size, const char *sys)
6381 struct tep_event *event = NULL;
6382 return __parse_event(tep, &event, buf, size, sys);
6385 int get_field_val(struct trace_seq *s, struct tep_format_field *field,
6386 const char *name, struct tep_record *record,
6387 unsigned long long *val, int err)
6391 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6395 if (tep_read_number_field(field, record->data, val)) {
6397 trace_seq_printf(s, " %s=INVALID", name);
6405 * tep_get_field_raw - return the raw pointer into the data field
6406 * @s: The seq to print to on error
6407 * @event: the event that the field is for
6408 * @name: The name of the field
6409 * @record: The record with the field name.
6410 * @len: place to store the field length.
6411 * @err: print default error if failed.
6413 * Returns a pointer into record->data of the field and places
6414 * the length of the field in @len.
6416 * On failure, it returns NULL.
6418 void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
6419 const char *name, struct tep_record *record,
6422 struct tep_format_field *field;
6423 void *data = record->data;
6430 field = tep_find_field(event, name);
6434 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6438 /* Allow @len to be NULL */
6442 offset = field->offset;
6443 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
6444 offset = tep_read_number(event->tep,
6445 data + offset, field->size);
6446 *len = offset >> 16;
6451 return data + offset;
6455 * tep_get_field_val - find a field and return its value
6456 * @s: The seq to print to on error
6457 * @event: the event that the field is for
6458 * @name: The name of the field
6459 * @record: The record with the field name.
6460 * @val: place to store the value of the field.
6461 * @err: print default error if failed.
6463 * Returns 0 on success -1 on field not found.
6465 int tep_get_field_val(struct trace_seq *s, struct tep_event *event,
6466 const char *name, struct tep_record *record,
6467 unsigned long long *val, int err)
6469 struct tep_format_field *field;
6474 field = tep_find_field(event, name);
6476 return get_field_val(s, field, name, record, val, err);
6480 * tep_get_common_field_val - find a common field and return its value
6481 * @s: The seq to print to on error
6482 * @event: the event that the field is for
6483 * @name: The name of the field
6484 * @record: The record with the field name.
6485 * @val: place to store the value of the field.
6486 * @err: print default error if failed.
6488 * Returns 0 on success -1 on field not found.
6490 int tep_get_common_field_val(struct trace_seq *s, struct tep_event *event,
6491 const char *name, struct tep_record *record,
6492 unsigned long long *val, int err)
6494 struct tep_format_field *field;
6499 field = tep_find_common_field(event, name);
6501 return get_field_val(s, field, name, record, val, err);
6505 * tep_get_any_field_val - find a any field and return its value
6506 * @s: The seq to print to on error
6507 * @event: the event that the field is for
6508 * @name: The name of the field
6509 * @record: The record with the field name.
6510 * @val: place to store the value of the field.
6511 * @err: print default error if failed.
6513 * Returns 0 on success -1 on field not found.
6515 int tep_get_any_field_val(struct trace_seq *s, struct tep_event *event,
6516 const char *name, struct tep_record *record,
6517 unsigned long long *val, int err)
6519 struct tep_format_field *field;
6524 field = tep_find_any_field(event, name);
6526 return get_field_val(s, field, name, record, val, err);
6530 * tep_print_num_field - print a field and a format
6531 * @s: The seq to print to
6532 * @fmt: The printf format to print the field with.
6533 * @event: the event that the field is for
6534 * @name: The name of the field
6535 * @record: The record with the field name.
6536 * @err: print default error if failed.
6538 * Returns positive value on success, negative in case of an error,
6539 * or 0 if buffer is full.
6541 int tep_print_num_field(struct trace_seq *s, const char *fmt,
6542 struct tep_event *event, const char *name,
6543 struct tep_record *record, int err)
6545 struct tep_format_field *field = tep_find_field(event, name);
6546 unsigned long long val;
6551 if (tep_read_number_field(field, record->data, &val))
6554 return trace_seq_printf(s, fmt, val);
6558 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6563 * tep_print_func_field - print a field and a format for function pointers
6564 * @s: The seq to print to
6565 * @fmt: The printf format to print the field with.
6566 * @event: the event that the field is for
6567 * @name: The name of the field
6568 * @record: The record with the field name.
6569 * @err: print default error if failed.
6571 * Returns positive value on success, negative in case of an error,
6572 * or 0 if buffer is full.
6574 int tep_print_func_field(struct trace_seq *s, const char *fmt,
6575 struct tep_event *event, const char *name,
6576 struct tep_record *record, int err)
6578 struct tep_format_field *field = tep_find_field(event, name);
6579 struct tep_handle *tep = event->tep;
6580 unsigned long long val;
6581 struct func_map *func;
6587 if (tep_read_number_field(field, record->data, &val))
6590 func = find_func(tep, val);
6593 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6595 sprintf(tmp, "0x%08llx", val);
6597 return trace_seq_printf(s, fmt, tmp);
6601 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6605 static void free_func_handle(struct tep_function_handler *func)
6607 struct func_params *params;
6611 while (func->params) {
6612 params = func->params;
6613 func->params = params->next;
6621 * tep_register_print_function - register a helper function
6622 * @tep: a handle to the trace event parser context
6623 * @func: the function to process the helper function
6624 * @ret_type: the return type of the helper function
6625 * @name: the name of the helper function
6626 * @parameters: A list of enum tep_func_arg_type
6628 * Some events may have helper functions in the print format arguments.
6629 * This allows a plugin to dynamically create a way to process one
6630 * of these functions.
6632 * The @parameters is a variable list of tep_func_arg_type enums that
6633 * must end with TEP_FUNC_ARG_VOID.
6635 int tep_register_print_function(struct tep_handle *tep,
6636 tep_func_handler func,
6637 enum tep_func_arg_type ret_type,
6640 struct tep_function_handler *func_handle;
6641 struct func_params **next_param;
6642 struct func_params *param;
6643 enum tep_func_arg_type type;
6647 func_handle = find_func_handler(tep, name);
6650 * This is most like caused by the users own
6651 * plugins updating the function. This overrides the
6654 pr_stat("override of function helper '%s'", name);
6655 remove_func_handler(tep, name);
6658 func_handle = calloc(1, sizeof(*func_handle));
6660 do_warning("Failed to allocate function handler");
6661 return TEP_ERRNO__MEM_ALLOC_FAILED;
6664 func_handle->ret_type = ret_type;
6665 func_handle->name = strdup(name);
6666 func_handle->func = func;
6667 if (!func_handle->name) {
6668 do_warning("Failed to allocate function name");
6670 return TEP_ERRNO__MEM_ALLOC_FAILED;
6673 next_param = &(func_handle->params);
6676 type = va_arg(ap, enum tep_func_arg_type);
6677 if (type == TEP_FUNC_ARG_VOID)
6680 if (type >= TEP_FUNC_ARG_MAX_TYPES) {
6681 do_warning("Invalid argument type %d", type);
6682 ret = TEP_ERRNO__INVALID_ARG_TYPE;
6686 param = malloc(sizeof(*param));
6688 do_warning("Failed to allocate function param");
6689 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6695 *next_param = param;
6696 next_param = &(param->next);
6698 func_handle->nr_args++;
6702 func_handle->next = tep->func_handlers;
6703 tep->func_handlers = func_handle;
6708 free_func_handle(func_handle);
6713 * tep_unregister_print_function - unregister a helper function
6714 * @tep: a handle to the trace event parser context
6715 * @func: the function to process the helper function
6716 * @name: the name of the helper function
6718 * This function removes existing print handler for function @name.
6720 * Returns 0 if the handler was removed successully, -1 otherwise.
6722 int tep_unregister_print_function(struct tep_handle *tep,
6723 tep_func_handler func, char *name)
6725 struct tep_function_handler *func_handle;
6727 func_handle = find_func_handler(tep, name);
6728 if (func_handle && func_handle->func == func) {
6729 remove_func_handler(tep, name);
6735 static struct tep_event *search_event(struct tep_handle *tep, int id,
6736 const char *sys_name,
6737 const char *event_name)
6739 struct tep_event *event;
6743 event = tep_find_event(tep, id);
6746 if (event_name && (strcmp(event_name, event->name) != 0))
6748 if (sys_name && (strcmp(sys_name, event->system) != 0))
6751 event = tep_find_event_by_name(tep, sys_name, event_name);
6759 * tep_register_event_handler - register a way to parse an event
6760 * @tep: a handle to the trace event parser context
6761 * @id: the id of the event to register
6762 * @sys_name: the system name the event belongs to
6763 * @event_name: the name of the event
6764 * @func: the function to call to parse the event information
6765 * @context: the data to be passed to @func
6767 * This function allows a developer to override the parsing of
6768 * a given event. If for some reason the default print format
6769 * is not sufficient, this function will register a function
6770 * for an event to be used to parse the data instead.
6772 * If @id is >= 0, then it is used to find the event.
6773 * else @sys_name and @event_name are used.
6776 * TEP_REGISTER_SUCCESS_OVERWRITE if an existing handler is overwritten
6777 * TEP_REGISTER_SUCCESS if a new handler is registered successfully
6778 * negative TEP_ERRNO_... in case of an error
6781 int tep_register_event_handler(struct tep_handle *tep, int id,
6782 const char *sys_name, const char *event_name,
6783 tep_event_handler_func func, void *context)
6785 struct tep_event *event;
6786 struct event_handler *handle;
6788 event = search_event(tep, id, sys_name, event_name);
6792 pr_stat("overriding event (%d) %s:%s with new print handler",
6793 event->id, event->system, event->name);
6795 event->handler = func;
6796 event->context = context;
6797 return TEP_REGISTER_SUCCESS_OVERWRITE;
6800 /* Save for later use. */
6801 handle = calloc(1, sizeof(*handle));
6803 do_warning("Failed to allocate event handler");
6804 return TEP_ERRNO__MEM_ALLOC_FAILED;
6809 handle->event_name = strdup(event_name);
6811 handle->sys_name = strdup(sys_name);
6813 if ((event_name && !handle->event_name) ||
6814 (sys_name && !handle->sys_name)) {
6815 do_warning("Failed to allocate event/sys name");
6816 free((void *)handle->event_name);
6817 free((void *)handle->sys_name);
6819 return TEP_ERRNO__MEM_ALLOC_FAILED;
6822 handle->func = func;
6823 handle->next = tep->handlers;
6824 tep->handlers = handle;
6825 handle->context = context;
6827 return TEP_REGISTER_SUCCESS;
6830 static int handle_matches(struct event_handler *handler, int id,
6831 const char *sys_name, const char *event_name,
6832 tep_event_handler_func func, void *context)
6834 if (id >= 0 && id != handler->id)
6837 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6840 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6843 if (func != handler->func || context != handler->context)
6850 * tep_unregister_event_handler - unregister an existing event handler
6851 * @tep: a handle to the trace event parser context
6852 * @id: the id of the event to unregister
6853 * @sys_name: the system name the handler belongs to
6854 * @event_name: the name of the event handler
6855 * @func: the function to call to parse the event information
6856 * @context: the data to be passed to @func
6858 * This function removes existing event handler (parser).
6860 * If @id is >= 0, then it is used to find the event.
6861 * else @sys_name and @event_name are used.
6863 * Returns 0 if handler was removed successfully, -1 if event was not found.
6865 int tep_unregister_event_handler(struct tep_handle *tep, int id,
6866 const char *sys_name, const char *event_name,
6867 tep_event_handler_func func, void *context)
6869 struct tep_event *event;
6870 struct event_handler *handle;
6871 struct event_handler **next;
6873 event = search_event(tep, id, sys_name, event_name);
6877 if (event->handler == func && event->context == context) {
6878 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6879 event->id, event->system, event->name);
6881 event->handler = NULL;
6882 event->context = NULL;
6887 for (next = &tep->handlers; *next; next = &(*next)->next) {
6889 if (handle_matches(handle, id, sys_name, event_name,
6897 *next = handle->next;
6898 free_handler(handle);
6904 * tep_alloc - create a tep handle
6906 struct tep_handle *tep_alloc(void)
6908 struct tep_handle *tep = calloc(1, sizeof(*tep));
6912 tep->host_bigendian = tep_is_bigendian();
6918 void tep_ref(struct tep_handle *tep)
6923 int tep_get_ref(struct tep_handle *tep)
6926 return tep->ref_count;
6930 void tep_free_format_field(struct tep_format_field *field)
6933 if (field->alias != field->name)
6939 static void free_format_fields(struct tep_format_field *field)
6941 struct tep_format_field *next;
6945 tep_free_format_field(field);
6950 static void free_formats(struct tep_format *format)
6952 free_format_fields(format->common_fields);
6953 free_format_fields(format->fields);
6956 void tep_free_event(struct tep_event *event)
6959 free(event->system);
6961 free_formats(&event->format);
6963 free(event->print_fmt.format);
6964 free_args(event->print_fmt.args);
6970 * tep_free - free a tep handle
6971 * @tep: the tep handle to free
6973 void tep_free(struct tep_handle *tep)
6975 struct cmdline_list *cmdlist, *cmdnext;
6976 struct func_list *funclist, *funcnext;
6977 struct printk_list *printklist, *printknext;
6978 struct tep_function_handler *func_handler;
6979 struct event_handler *handle;
6985 cmdlist = tep->cmdlist;
6986 funclist = tep->funclist;
6987 printklist = tep->printklist;
6993 if (tep->cmdlines) {
6994 for (i = 0; i < tep->cmdline_count; i++)
6995 free(tep->cmdlines[i].comm);
6996 free(tep->cmdlines);
7000 cmdnext = cmdlist->next;
7001 free(cmdlist->comm);
7006 if (tep->func_map) {
7007 for (i = 0; i < (int)tep->func_count; i++) {
7008 free(tep->func_map[i].func);
7009 free(tep->func_map[i].mod);
7011 free(tep->func_map);
7015 funcnext = funclist->next;
7016 free(funclist->func);
7017 free(funclist->mod);
7019 funclist = funcnext;
7022 while (tep->func_handlers) {
7023 func_handler = tep->func_handlers;
7024 tep->func_handlers = func_handler->next;
7025 free_func_handle(func_handler);
7028 if (tep->printk_map) {
7029 for (i = 0; i < (int)tep->printk_count; i++)
7030 free(tep->printk_map[i].printk);
7031 free(tep->printk_map);
7034 while (printklist) {
7035 printknext = printklist->next;
7036 free(printklist->printk);
7038 printklist = printknext;
7041 for (i = 0; i < tep->nr_events; i++)
7042 tep_free_event(tep->events[i]);
7044 while (tep->handlers) {
7045 handle = tep->handlers;
7046 tep->handlers = handle->next;
7047 free_handler(handle);
7051 free(tep->sort_events);
7052 free(tep->func_resolver);
7057 void tep_unref(struct tep_handle *tep)