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 append(char **buf, const char *delim, const char *str)
1432 new_buf = realloc(*buf, strlen(*buf) + strlen(delim) + strlen(str) + 1);
1435 strcat(new_buf, delim);
1436 strcat(new_buf, str);
1441 static int event_read_fields(struct tep_event *event, struct tep_format_field **fields)
1443 struct tep_format_field *field = NULL;
1444 enum tep_event_type type;
1452 unsigned int size_dynamic = 0;
1454 type = read_token(&token);
1455 if (type == TEP_EVENT_NEWLINE) {
1462 if (test_type_token(type, token, TEP_EVENT_ITEM, "field"))
1466 type = read_token(&token);
1468 * The ftrace fields may still use the "special" name.
1471 if (event->flags & TEP_EVENT_FL_ISFTRACE &&
1472 type == TEP_EVENT_ITEM && strcmp(token, "special") == 0) {
1474 type = read_token(&token);
1477 if (test_type_token(type, token, TEP_EVENT_OP, ":") < 0)
1481 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
1486 field = calloc(1, sizeof(*field));
1490 field->event = event;
1492 /* read the rest of the type */
1494 type = read_token(&token);
1495 if (type == TEP_EVENT_ITEM ||
1496 (type == TEP_EVENT_OP && strcmp(token, "*") == 0) ||
1498 * Some of the ftrace fields are broken and have
1499 * an illegal "." in them.
1501 (event->flags & TEP_EVENT_FL_ISFTRACE &&
1502 type == TEP_EVENT_OP && strcmp(token, ".") == 0)) {
1504 if (strcmp(token, "*") == 0)
1505 field->flags |= TEP_FIELD_IS_POINTER;
1508 ret = append(&field->type, delim, last_token);
1513 field->type = last_token;
1519 /* Handle __attribute__((user)) */
1520 if ((type == TEP_EVENT_DELIM) &&
1521 strcmp("__attribute__", last_token) == 0 &&
1526 ret = append(&field->type, " ", last_token);
1527 ret |= append(&field->type, "", "(");
1532 while ((type = read_token(&token)) != TEP_EVENT_NONE) {
1533 if (type == TEP_EVENT_DELIM) {
1534 if (token[0] == '(')
1536 else if (token[0] == ')')
1540 ret = append(&field->type, "", token);
1543 ret = append(&field->type, delim, token);
1557 do_warning_event(event, "%s: no type found", __func__);
1560 field->name = field->alias = last_token;
1562 if (test_type(type, TEP_EVENT_OP))
1565 if (strcmp(token, "[") == 0) {
1566 enum tep_event_type last_type = type;
1567 char *brackets = token;
1569 field->flags |= TEP_FIELD_IS_ARRAY;
1571 type = read_token(&token);
1573 if (type == TEP_EVENT_ITEM)
1574 field->arraylen = strtoul(token, NULL, 0);
1576 field->arraylen = 0;
1578 while (strcmp(token, "]") != 0) {
1581 if (last_type == TEP_EVENT_ITEM &&
1582 type == TEP_EVENT_ITEM)
1589 ret = append(&brackets, delim, token);
1594 /* We only care about the last token */
1595 field->arraylen = strtoul(token, NULL, 0);
1597 type = read_token(&token);
1598 if (type == TEP_EVENT_NONE) {
1600 do_warning_event(event, "failed to find token");
1607 ret = append(&brackets, "", "]");
1613 /* add brackets to type */
1615 type = read_token(&token);
1617 * If the next token is not an OP, then it is of
1618 * the format: type [] item;
1620 if (type == TEP_EVENT_ITEM) {
1621 ret = append(&field->type, " ", field->name);
1626 ret = append(&field->type, "", brackets);
1628 size_dynamic = type_size(field->name);
1629 free_token(field->name);
1630 field->name = field->alias = token;
1631 type = read_token(&token);
1633 ret = append(&field->type, "", brackets);
1642 if (field_is_string(field))
1643 field->flags |= TEP_FIELD_IS_STRING;
1644 if (field_is_dynamic(field))
1645 field->flags |= TEP_FIELD_IS_DYNAMIC;
1646 if (field_is_long(field))
1647 field->flags |= TEP_FIELD_IS_LONG;
1649 if (test_type_token(type, token, TEP_EVENT_OP, ";"))
1653 if (read_expected(TEP_EVENT_ITEM, "offset") < 0)
1656 if (read_expected(TEP_EVENT_OP, ":") < 0)
1659 if (read_expect_type(TEP_EVENT_ITEM, &token))
1661 field->offset = strtoul(token, NULL, 0);
1664 if (read_expected(TEP_EVENT_OP, ";") < 0)
1667 if (read_expected(TEP_EVENT_ITEM, "size") < 0)
1670 if (read_expected(TEP_EVENT_OP, ":") < 0)
1673 if (read_expect_type(TEP_EVENT_ITEM, &token))
1675 field->size = strtoul(token, NULL, 0);
1678 if (read_expected(TEP_EVENT_OP, ";") < 0)
1681 type = read_token(&token);
1682 if (type != TEP_EVENT_NEWLINE) {
1683 /* newer versions of the kernel have a "signed" type */
1684 if (test_type_token(type, token, TEP_EVENT_ITEM, "signed"))
1689 if (read_expected(TEP_EVENT_OP, ":") < 0)
1692 if (read_expect_type(TEP_EVENT_ITEM, &token))
1695 if (strtoul(token, NULL, 0))
1696 field->flags |= TEP_FIELD_IS_SIGNED;
1699 if (read_expected(TEP_EVENT_OP, ";") < 0)
1702 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
1708 if (field->flags & TEP_FIELD_IS_ARRAY) {
1709 if (field->arraylen)
1710 field->elementsize = field->size / field->arraylen;
1711 else if (field->flags & TEP_FIELD_IS_DYNAMIC)
1712 field->elementsize = size_dynamic;
1713 else if (field->flags & TEP_FIELD_IS_STRING)
1714 field->elementsize = 1;
1715 else if (field->flags & TEP_FIELD_IS_LONG)
1716 field->elementsize = event->tep ?
1717 event->tep->long_size :
1720 field->elementsize = field->size;
1723 fields = &field->next;
1740 static int event_read_format(struct tep_event *event)
1745 if (read_expected_item(TEP_EVENT_ITEM, "format") < 0)
1748 if (read_expected(TEP_EVENT_OP, ":") < 0)
1751 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
1755 ret = event_read_fields(event, &event->format.common_fields);
1758 event->format.nr_common = ret;
1760 ret = event_read_fields(event, &event->format.fields);
1763 event->format.nr_fields = ret;
1772 static enum tep_event_type
1773 process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
1774 char **tok, enum tep_event_type type);
1776 static enum tep_event_type
1777 process_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1779 enum tep_event_type type;
1782 type = read_token(&token);
1785 return process_arg_token(event, arg, tok, type);
1788 static enum tep_event_type
1789 process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok);
1792 * For __print_symbolic() and __print_flags, we need to completely
1793 * evaluate the first argument, which defines what to print next.
1795 static enum tep_event_type
1796 process_field_arg(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1798 enum tep_event_type type;
1800 type = process_arg(event, arg, tok);
1802 while (type == TEP_EVENT_OP) {
1803 type = process_op(event, arg, tok);
1809 static enum tep_event_type
1810 process_cond(struct tep_event *event, struct tep_print_arg *top, char **tok)
1812 struct tep_print_arg *arg, *left, *right;
1813 enum tep_event_type type;
1818 right = alloc_arg();
1820 if (!arg || !left || !right) {
1821 do_warning_event(event, "%s: not enough memory!", __func__);
1822 /* arg will be freed at out_free */
1828 arg->type = TEP_PRINT_OP;
1829 arg->op.left = left;
1830 arg->op.right = right;
1833 type = process_arg(event, left, &token);
1836 if (type == TEP_EVENT_ERROR)
1839 /* Handle other operations in the arguments */
1840 if (type == TEP_EVENT_OP && strcmp(token, ":") != 0) {
1841 type = process_op(event, left, &token);
1845 if (test_type_token(type, token, TEP_EVENT_OP, ":"))
1850 type = process_arg(event, right, &token);
1852 top->op.right = arg;
1858 /* Top may point to itself */
1859 top->op.right = NULL;
1862 return TEP_EVENT_ERROR;
1865 static enum tep_event_type
1866 process_array(struct tep_event *event, struct tep_print_arg *top, char **tok)
1868 struct tep_print_arg *arg;
1869 enum tep_event_type type;
1874 do_warning_event(event, "%s: not enough memory!", __func__);
1875 /* '*tok' is set to top->op.op. No need to free. */
1877 return TEP_EVENT_ERROR;
1881 type = process_arg(event, arg, &token);
1882 if (test_type_token(type, token, TEP_EVENT_OP, "]"))
1885 top->op.right = arg;
1888 type = read_token_item(&token);
1896 return TEP_EVENT_ERROR;
1899 static int get_op_prio(char *op)
1913 /* '>>' and '<<' are 8 */
1917 /* '==' and '!=' are 10 */
1927 do_warning("unknown op '%c'", op[0]);
1931 if (strcmp(op, "++") == 0 ||
1932 strcmp(op, "--") == 0) {
1934 } else if (strcmp(op, ">>") == 0 ||
1935 strcmp(op, "<<") == 0) {
1937 } else if (strcmp(op, ">=") == 0 ||
1938 strcmp(op, "<=") == 0) {
1940 } else if (strcmp(op, "==") == 0 ||
1941 strcmp(op, "!=") == 0) {
1943 } else if (strcmp(op, "&&") == 0) {
1945 } else if (strcmp(op, "||") == 0) {
1948 do_warning("unknown op '%s'", op);
1954 static int set_op_prio(struct tep_print_arg *arg)
1957 /* single ops are the greatest */
1958 if (!arg->op.left || arg->op.left->type == TEP_PRINT_NULL)
1961 arg->op.prio = get_op_prio(arg->op.op);
1963 return arg->op.prio;
1966 /* Note, *tok does not get freed, but will most likely be saved */
1967 static enum tep_event_type
1968 process_op(struct tep_event *event, struct tep_print_arg *arg, char **tok)
1970 struct tep_print_arg *left, *right = NULL;
1971 enum tep_event_type type;
1974 /* the op is passed in via tok */
1977 if (arg->type == TEP_PRINT_OP && !arg->op.left) {
1978 /* handle single op */
1980 do_warning_event(event, "bad op token %s", token);
1990 do_warning_event(event, "bad op token %s", token);
1995 /* make an empty left */
2000 left->type = TEP_PRINT_NULL;
2001 arg->op.left = left;
2003 right = alloc_arg();
2007 arg->op.right = right;
2009 /* do not free the token, it belongs to an op */
2011 type = process_arg(event, right, tok);
2013 } else if (strcmp(token, "?") == 0) {
2019 /* copy the top arg to the left */
2022 arg->type = TEP_PRINT_OP;
2024 arg->op.left = left;
2027 /* it will set arg->op.right */
2028 type = process_cond(event, arg, tok);
2030 } else if (strcmp(token, ">>") == 0 ||
2031 strcmp(token, "<<") == 0 ||
2032 strcmp(token, "&") == 0 ||
2033 strcmp(token, "|") == 0 ||
2034 strcmp(token, "&&") == 0 ||
2035 strcmp(token, "||") == 0 ||
2036 strcmp(token, "-") == 0 ||
2037 strcmp(token, "+") == 0 ||
2038 strcmp(token, "*") == 0 ||
2039 strcmp(token, "^") == 0 ||
2040 strcmp(token, "/") == 0 ||
2041 strcmp(token, "%") == 0 ||
2042 strcmp(token, "<") == 0 ||
2043 strcmp(token, ">") == 0 ||
2044 strcmp(token, "<=") == 0 ||
2045 strcmp(token, ">=") == 0 ||
2046 strcmp(token, "==") == 0 ||
2047 strcmp(token, "!=") == 0) {
2053 /* copy the top arg to the left */
2056 arg->type = TEP_PRINT_OP;
2058 arg->op.left = left;
2059 arg->op.right = NULL;
2061 if (set_op_prio(arg) == -1) {
2062 event->flags |= TEP_EVENT_FL_FAILED;
2063 /* arg->op.op (= token) will be freed at out_free */
2068 type = read_token_item(&token);
2071 /* could just be a type pointer */
2072 if ((strcmp(arg->op.op, "*") == 0) &&
2073 type == TEP_EVENT_DELIM && (strcmp(token, ")") == 0)) {
2076 if (left->type != TEP_PRINT_ATOM) {
2077 do_warning_event(event, "bad pointer type");
2080 ret = append(&left->atom.atom, " ", "*");
2091 right = alloc_arg();
2095 type = process_arg_token(event, right, tok, type);
2096 if (type == TEP_EVENT_ERROR) {
2098 /* token was freed in process_arg_token() via *tok */
2103 if (right->type == TEP_PRINT_OP &&
2104 get_op_prio(arg->op.op) < get_op_prio(right->op.op)) {
2105 struct tep_print_arg tmp;
2107 /* rotate ops according to the priority */
2108 arg->op.right = right->op.left;
2114 arg->op.left = right;
2116 arg->op.right = right;
2119 } else if (strcmp(token, "[") == 0) {
2127 arg->type = TEP_PRINT_OP;
2129 arg->op.left = left;
2133 /* it will set arg->op.right */
2134 type = process_array(event, arg, tok);
2137 do_warning_event(event, "unknown op '%s'", token);
2138 event->flags |= TEP_EVENT_FL_FAILED;
2139 /* the arg is now the left side */
2143 if (type == TEP_EVENT_OP && strcmp(*tok, ":") != 0) {
2146 /* higher prios need to be closer to the root */
2147 prio = get_op_prio(*tok);
2149 if (prio > arg->op.prio)
2150 return process_op(event, arg, tok);
2152 return process_op(event, right, tok);
2158 do_warning_event(event, "%s: not enough memory!", __func__);
2162 return TEP_EVENT_ERROR;
2165 static enum tep_event_type
2166 process_entry(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2169 enum tep_event_type type;
2173 if (read_expected(TEP_EVENT_OP, "->") < 0)
2176 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2180 arg->type = TEP_PRINT_FIELD;
2181 arg->field.name = field;
2183 if (is_flag_field) {
2184 arg->field.field = tep_find_any_field(event, arg->field.name);
2185 arg->field.field->flags |= TEP_FIELD_IS_FLAG;
2187 } else if (is_symbolic_field) {
2188 arg->field.field = tep_find_any_field(event, arg->field.name);
2189 arg->field.field->flags |= TEP_FIELD_IS_SYMBOLIC;
2190 is_symbolic_field = 0;
2193 type = read_token(&token);
2202 return TEP_EVENT_ERROR;
2205 static int alloc_and_process_delim(struct tep_event *event, char *next_token,
2206 struct tep_print_arg **print_arg)
2208 struct tep_print_arg *field;
2209 enum tep_event_type type;
2213 field = alloc_arg();
2215 do_warning_event(event, "%s: not enough memory!", __func__);
2220 type = process_arg(event, field, &token);
2222 if (test_type_token(type, token, TEP_EVENT_DELIM, next_token)) {
2226 goto out_free_token;
2237 static char *arg_eval (struct tep_print_arg *arg);
2239 static unsigned long long
2240 eval_type_str(unsigned long long val, const char *type, int pointer)
2250 if (type[len-1] != '*') {
2251 do_warning("pointer expected with non pointer type");
2257 do_warning("%s: not enough memory!", __func__);
2260 memcpy(ref, type, len);
2262 /* chop off the " *" */
2265 val = eval_type_str(val, ref, 0);
2270 /* check if this is a pointer */
2271 if (type[len - 1] == '*')
2274 /* Try to figure out the arg size*/
2275 if (strncmp(type, "struct", 6) == 0)
2279 if (strcmp(type, "u8") == 0)
2282 if (strcmp(type, "u16") == 0)
2283 return val & 0xffff;
2285 if (strcmp(type, "u32") == 0)
2286 return val & 0xffffffff;
2288 if (strcmp(type, "u64") == 0 ||
2289 strcmp(type, "s64") == 0)
2292 if (strcmp(type, "s8") == 0)
2293 return (unsigned long long)(char)val & 0xff;
2295 if (strcmp(type, "s16") == 0)
2296 return (unsigned long long)(short)val & 0xffff;
2298 if (strcmp(type, "s32") == 0)
2299 return (unsigned long long)(int)val & 0xffffffff;
2301 if (strncmp(type, "unsigned ", 9) == 0) {
2306 if (strcmp(type, "char") == 0) {
2308 return (unsigned long long)(char)val & 0xff;
2313 if (strcmp(type, "short") == 0) {
2315 return (unsigned long long)(short)val & 0xffff;
2317 return val & 0xffff;
2320 if (strcmp(type, "int") == 0) {
2322 return (unsigned long long)(int)val & 0xffffffff;
2324 return val & 0xffffffff;
2331 * Try to figure out the type.
2333 static unsigned long long
2334 eval_type(unsigned long long val, struct tep_print_arg *arg, int pointer)
2336 if (arg->type != TEP_PRINT_TYPE) {
2337 do_warning("expected type argument");
2341 return eval_type_str(val, arg->typecast.type, pointer);
2344 static int arg_num_eval(struct tep_print_arg *arg, long long *val)
2346 long long left, right;
2349 switch (arg->type) {
2350 case TEP_PRINT_ATOM:
2351 *val = strtoll(arg->atom.atom, NULL, 0);
2353 case TEP_PRINT_TYPE:
2354 ret = arg_num_eval(arg->typecast.item, val);
2357 *val = eval_type(*val, arg, 0);
2360 switch (arg->op.op[0]) {
2362 ret = arg_num_eval(arg->op.left, &left);
2365 ret = arg_num_eval(arg->op.right, &right);
2369 *val = left || right;
2371 *val = left | right;
2374 ret = arg_num_eval(arg->op.left, &left);
2377 ret = arg_num_eval(arg->op.right, &right);
2381 *val = left && right;
2383 *val = left & right;
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);
2414 switch (arg->op.op[1]) {
2416 *val = left > right;
2419 *val = left >> right;
2422 *val = left >= right;
2425 do_warning("unknown op '%s'", arg->op.op);
2430 ret = arg_num_eval(arg->op.left, &left);
2433 ret = arg_num_eval(arg->op.right, &right);
2437 if (arg->op.op[1] != '=') {
2438 do_warning("unknown op '%s'", arg->op.op);
2441 *val = left == right;
2444 ret = arg_num_eval(arg->op.left, &left);
2447 ret = arg_num_eval(arg->op.right, &right);
2451 switch (arg->op.op[1]) {
2453 *val = left != right;
2456 do_warning("unknown op '%s'", arg->op.op);
2461 /* check for negative */
2462 if (arg->op.left->type == TEP_PRINT_NULL)
2465 ret = arg_num_eval(arg->op.left, &left);
2468 ret = arg_num_eval(arg->op.right, &right);
2471 *val = left - right;
2474 if (arg->op.left->type == TEP_PRINT_NULL)
2477 ret = arg_num_eval(arg->op.left, &left);
2480 ret = arg_num_eval(arg->op.right, &right);
2483 *val = left + right;
2486 ret = arg_num_eval(arg->op.right, &right);
2492 do_warning("unknown op '%s'", arg->op.op);
2497 case TEP_PRINT_NULL:
2498 case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
2499 case TEP_PRINT_STRING:
2500 case TEP_PRINT_BSTRING:
2501 case TEP_PRINT_BITMASK:
2503 do_warning("invalid eval type %d", arg->type);
2510 static char *arg_eval (struct tep_print_arg *arg)
2513 static char buf[24];
2515 switch (arg->type) {
2516 case TEP_PRINT_ATOM:
2517 return arg->atom.atom;
2518 case TEP_PRINT_TYPE:
2519 return arg_eval(arg->typecast.item);
2521 if (!arg_num_eval(arg, &val))
2523 sprintf(buf, "%lld", val);
2526 case TEP_PRINT_NULL:
2527 case TEP_PRINT_FIELD ... TEP_PRINT_SYMBOL:
2528 case TEP_PRINT_STRING:
2529 case TEP_PRINT_BSTRING:
2530 case TEP_PRINT_BITMASK:
2532 do_warning("invalid eval type %d", arg->type);
2539 static enum tep_event_type
2540 process_fields(struct tep_event *event, struct tep_print_flag_sym **list, char **tok)
2542 enum tep_event_type type;
2543 struct tep_print_arg *arg = NULL;
2544 struct tep_print_flag_sym *field;
2550 type = read_token_item(&token);
2551 if (test_type_token(type, token, TEP_EVENT_OP, "{"))
2559 type = process_arg(event, arg, &token);
2561 if (type == TEP_EVENT_OP)
2562 type = process_op(event, arg, &token);
2564 if (type == TEP_EVENT_ERROR)
2567 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2570 field = calloc(1, sizeof(*field));
2574 value = arg_eval(arg);
2576 goto out_free_field;
2577 field->value = strdup(value);
2578 if (field->value == NULL)
2579 goto out_free_field;
2587 type = process_arg(event, arg, &token);
2588 if (test_type_token(type, token, TEP_EVENT_OP, "}"))
2589 goto out_free_field;
2591 value = arg_eval(arg);
2593 goto out_free_field;
2594 field->str = strdup(value);
2595 if (field->str == NULL)
2596 goto out_free_field;
2601 list = &field->next;
2604 type = read_token_item(&token);
2605 } while (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0);
2611 free_flag_sym(field);
2617 return TEP_EVENT_ERROR;
2620 static enum tep_event_type
2621 process_flags(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2623 struct tep_print_arg *field;
2624 enum tep_event_type type;
2627 memset(arg, 0, sizeof(*arg));
2628 arg->type = TEP_PRINT_FLAGS;
2630 field = alloc_arg();
2632 do_warning_event(event, "%s: not enough memory!", __func__);
2636 type = process_field_arg(event, field, &token);
2638 /* Handle operations in the first argument */
2639 while (type == TEP_EVENT_OP)
2640 type = process_op(event, field, &token);
2642 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2643 goto out_free_field;
2646 arg->flags.field = field;
2648 type = read_token_item(&token);
2649 if (event_item_type(type)) {
2650 arg->flags.delim = token;
2651 type = read_token_item(&token);
2654 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2657 type = process_fields(event, &arg->flags.flags, &token);
2658 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2662 type = read_token_item(tok);
2670 return TEP_EVENT_ERROR;
2673 static enum tep_event_type
2674 process_symbols(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2676 struct tep_print_arg *field;
2677 enum tep_event_type type;
2680 memset(arg, 0, sizeof(*arg));
2681 arg->type = TEP_PRINT_SYMBOL;
2683 field = alloc_arg();
2685 do_warning_event(event, "%s: not enough memory!", __func__);
2689 type = process_field_arg(event, field, &token);
2691 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
2692 goto out_free_field;
2694 arg->symbol.field = field;
2696 type = process_fields(event, &arg->symbol.symbols, &token);
2697 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2701 type = read_token_item(tok);
2709 return TEP_EVENT_ERROR;
2712 static enum tep_event_type
2713 process_hex_common(struct tep_event *event, struct tep_print_arg *arg,
2714 char **tok, enum tep_print_arg_type type)
2716 memset(arg, 0, sizeof(*arg));
2719 if (alloc_and_process_delim(event, ",", &arg->hex.field))
2722 if (alloc_and_process_delim(event, ")", &arg->hex.size))
2725 return read_token_item(tok);
2728 free_arg(arg->hex.field);
2729 arg->hex.field = NULL;
2732 return TEP_EVENT_ERROR;
2735 static enum tep_event_type
2736 process_hex(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2738 return process_hex_common(event, arg, tok, TEP_PRINT_HEX);
2741 static enum tep_event_type
2742 process_hex_str(struct tep_event *event, struct tep_print_arg *arg,
2745 return process_hex_common(event, arg, tok, TEP_PRINT_HEX_STR);
2748 static enum tep_event_type
2749 process_int_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2751 memset(arg, 0, sizeof(*arg));
2752 arg->type = TEP_PRINT_INT_ARRAY;
2754 if (alloc_and_process_delim(event, ",", &arg->int_array.field))
2757 if (alloc_and_process_delim(event, ",", &arg->int_array.count))
2760 if (alloc_and_process_delim(event, ")", &arg->int_array.el_size))
2763 return read_token_item(tok);
2766 free_arg(arg->int_array.count);
2767 arg->int_array.count = NULL;
2769 free_arg(arg->int_array.field);
2770 arg->int_array.field = NULL;
2773 return TEP_EVENT_ERROR;
2776 static enum tep_event_type
2777 process_dynamic_array(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2779 struct tep_format_field *field;
2780 enum tep_event_type type;
2783 memset(arg, 0, sizeof(*arg));
2784 arg->type = TEP_PRINT_DYNAMIC_ARRAY;
2787 * The item within the parenthesis is another field that holds
2788 * the index into where the array starts.
2790 type = read_token(&token);
2792 if (type != TEP_EVENT_ITEM)
2795 /* Find the field */
2797 field = tep_find_field(event, token);
2801 arg->dynarray.field = field;
2802 arg->dynarray.index = 0;
2804 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2808 type = read_token_item(&token);
2810 if (type != TEP_EVENT_OP || strcmp(token, "[") != 0)
2816 do_warning_event(event, "%s: not enough memory!", __func__);
2818 return TEP_EVENT_ERROR;
2821 type = process_arg(event, arg, &token);
2822 if (type == TEP_EVENT_ERROR)
2825 if (!test_type_token(type, token, TEP_EVENT_OP, "]"))
2829 type = read_token_item(tok);
2837 return TEP_EVENT_ERROR;
2840 static enum tep_event_type
2841 process_dynamic_array_len(struct tep_event *event, struct tep_print_arg *arg,
2844 struct tep_format_field *field;
2845 enum tep_event_type type;
2848 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2851 arg->type = TEP_PRINT_DYNAMIC_ARRAY_LEN;
2853 /* Find the field */
2854 field = tep_find_field(event, token);
2858 arg->dynarray.field = field;
2859 arg->dynarray.index = 0;
2861 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2865 type = read_token(&token);
2874 return TEP_EVENT_ERROR;
2877 static enum tep_event_type
2878 process_paren(struct tep_event *event, struct tep_print_arg *arg, char **tok)
2880 struct tep_print_arg *item_arg;
2881 enum tep_event_type type;
2884 type = process_arg(event, arg, &token);
2886 if (type == TEP_EVENT_ERROR)
2889 if (type == TEP_EVENT_OP)
2890 type = process_op(event, arg, &token);
2892 if (type == TEP_EVENT_ERROR)
2895 if (test_type_token(type, token, TEP_EVENT_DELIM, ")"))
2899 type = read_token_item(&token);
2902 * If the next token is an item or another open paren, then
2903 * this was a typecast.
2905 if (event_item_type(type) ||
2906 (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0)) {
2908 /* make this a typecast and contine */
2910 /* prevous must be an atom */
2911 if (arg->type != TEP_PRINT_ATOM) {
2912 do_warning_event(event, "previous needed to be TEP_PRINT_ATOM");
2916 item_arg = alloc_arg();
2918 do_warning_event(event, "%s: not enough memory!",
2923 arg->type = TEP_PRINT_TYPE;
2924 arg->typecast.type = arg->atom.atom;
2925 arg->typecast.item = item_arg;
2926 type = process_arg_token(event, item_arg, &token, type);
2936 return TEP_EVENT_ERROR;
2940 static enum tep_event_type
2941 process_str(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2944 enum tep_event_type type;
2947 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2950 arg->type = TEP_PRINT_STRING;
2951 arg->string.string = token;
2952 arg->string.offset = -1;
2954 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2957 type = read_token(&token);
2966 return TEP_EVENT_ERROR;
2969 static enum tep_event_type
2970 process_bitmask(struct tep_event *event __maybe_unused, struct tep_print_arg *arg,
2973 enum tep_event_type type;
2976 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
2979 arg->type = TEP_PRINT_BITMASK;
2980 arg->bitmask.bitmask = token;
2981 arg->bitmask.offset = -1;
2983 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
2986 type = read_token(&token);
2995 return TEP_EVENT_ERROR;
2998 static struct tep_function_handler *
2999 find_func_handler(struct tep_handle *tep, char *func_name)
3001 struct tep_function_handler *func;
3006 for (func = tep->func_handlers; func; func = func->next) {
3007 if (strcmp(func->name, func_name) == 0)
3014 static void remove_func_handler(struct tep_handle *tep, char *func_name)
3016 struct tep_function_handler *func;
3017 struct tep_function_handler **next;
3019 next = &tep->func_handlers;
3020 while ((func = *next)) {
3021 if (strcmp(func->name, func_name) == 0) {
3023 free_func_handle(func);
3030 static enum tep_event_type
3031 process_func_handler(struct tep_event *event, struct tep_function_handler *func,
3032 struct tep_print_arg *arg, char **tok)
3034 struct tep_print_arg **next_arg;
3035 struct tep_print_arg *farg;
3036 enum tep_event_type type;
3040 arg->type = TEP_PRINT_FUNC;
3041 arg->func.func = func;
3045 next_arg = &(arg->func.args);
3046 for (i = 0; i < func->nr_args; i++) {
3049 do_warning_event(event, "%s: not enough memory!",
3051 return TEP_EVENT_ERROR;
3054 type = process_arg(event, farg, &token);
3055 if (i < (func->nr_args - 1)) {
3056 if (type != TEP_EVENT_DELIM || strcmp(token, ",") != 0) {
3057 do_warning_event(event,
3058 "Error: function '%s()' expects %d arguments but event %s only uses %d",
3059 func->name, func->nr_args,
3060 event->name, i + 1);
3064 if (type != TEP_EVENT_DELIM || strcmp(token, ")") != 0) {
3065 do_warning_event(event,
3066 "Error: function '%s()' only expects %d arguments but event %s has more",
3067 func->name, func->nr_args, event->name);
3073 next_arg = &(farg->next);
3077 type = read_token(&token);
3085 return TEP_EVENT_ERROR;
3088 static enum tep_event_type
3089 process_builtin_expect(struct tep_event *event, struct tep_print_arg *arg, char **tok)
3091 enum tep_event_type type;
3094 /* Handle __builtin_expect( cond, #) */
3095 type = process_arg(event, arg, &token);
3097 if (type != TEP_EVENT_DELIM || token[0] != ',')
3102 /* We don't care what the second parameter is of the __builtin_expect() */
3103 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
3106 if (read_expected(TEP_EVENT_DELIM, ")") < 0)
3110 type = read_token_item(tok);
3116 return TEP_EVENT_ERROR;
3119 static enum tep_event_type
3120 process_function(struct tep_event *event, struct tep_print_arg *arg,
3121 char *token, char **tok)
3123 struct tep_function_handler *func;
3125 if (strcmp(token, "__print_flags") == 0) {
3128 return process_flags(event, arg, tok);
3130 if (strcmp(token, "__print_symbolic") == 0) {
3132 is_symbolic_field = 1;
3133 return process_symbols(event, arg, tok);
3135 if (strcmp(token, "__print_hex") == 0) {
3137 return process_hex(event, arg, tok);
3139 if (strcmp(token, "__print_hex_str") == 0) {
3141 return process_hex_str(event, arg, tok);
3143 if (strcmp(token, "__print_array") == 0) {
3145 return process_int_array(event, arg, tok);
3147 if (strcmp(token, "__get_str") == 0) {
3149 return process_str(event, arg, tok);
3151 if (strcmp(token, "__get_bitmask") == 0) {
3153 return process_bitmask(event, arg, tok);
3155 if (strcmp(token, "__get_dynamic_array") == 0) {
3157 return process_dynamic_array(event, arg, tok);
3159 if (strcmp(token, "__get_dynamic_array_len") == 0) {
3161 return process_dynamic_array_len(event, arg, tok);
3163 if (strcmp(token, "__builtin_expect") == 0) {
3165 return process_builtin_expect(event, arg, tok);
3168 func = find_func_handler(event->tep, token);
3171 return process_func_handler(event, func, arg, tok);
3174 do_warning_event(event, "function %s not defined", token);
3176 return TEP_EVENT_ERROR;
3179 static enum tep_event_type
3180 process_arg_token(struct tep_event *event, struct tep_print_arg *arg,
3181 char **tok, enum tep_event_type type)
3189 case TEP_EVENT_ITEM:
3190 if (strcmp(token, "REC") == 0) {
3192 type = process_entry(event, arg, &token);
3196 /* test the next token */
3197 type = read_token_item(&token);
3200 * If the next token is a parenthesis, then this
3203 if (type == TEP_EVENT_DELIM && strcmp(token, "(") == 0) {
3206 /* this will free atom. */
3207 type = process_function(event, arg, atom, &token);
3210 /* atoms can be more than one token long */
3211 while (type == TEP_EVENT_ITEM) {
3214 ret = append(&atom, " ", token);
3219 return TEP_EVENT_ERROR;
3222 type = read_token_item(&token);
3225 arg->type = TEP_PRINT_ATOM;
3226 arg->atom.atom = atom;
3229 case TEP_EVENT_DQUOTE:
3230 case TEP_EVENT_SQUOTE:
3231 arg->type = TEP_PRINT_ATOM;
3232 arg->atom.atom = token;
3233 type = read_token_item(&token);
3235 case TEP_EVENT_DELIM:
3236 if (strcmp(token, "(") == 0) {
3238 type = process_paren(event, arg, &token);
3242 /* handle single ops */
3243 arg->type = TEP_PRINT_OP;
3245 arg->op.left = NULL;
3246 type = process_op(event, arg, &token);
3248 /* On error, the op is freed */
3249 if (type == TEP_EVENT_ERROR)
3252 /* return error type if errored */
3255 case TEP_EVENT_ERROR ... TEP_EVENT_NEWLINE:
3257 do_warning_event(event, "unexpected type %d", type);
3258 return TEP_EVENT_ERROR;
3265 static int event_read_print_args(struct tep_event *event, struct tep_print_arg **list)
3267 enum tep_event_type type = TEP_EVENT_ERROR;
3268 struct tep_print_arg *arg;
3273 if (type == TEP_EVENT_NEWLINE) {
3274 type = read_token_item(&token);
3280 do_warning_event(event, "%s: not enough memory!",
3285 type = process_arg(event, arg, &token);
3287 if (type == TEP_EVENT_ERROR) {
3296 if (type == TEP_EVENT_OP) {
3297 type = process_op(event, arg, &token);
3299 if (type == TEP_EVENT_ERROR) {
3308 if (type == TEP_EVENT_DELIM && strcmp(token, ",") == 0) {
3315 } while (type != TEP_EVENT_NONE);
3317 if (type != TEP_EVENT_NONE && type != TEP_EVENT_ERROR)
3323 static int event_read_print(struct tep_event *event)
3325 enum tep_event_type type;
3329 if (read_expected_item(TEP_EVENT_ITEM, "print") < 0)
3332 if (read_expected(TEP_EVENT_ITEM, "fmt") < 0)
3335 if (read_expected(TEP_EVENT_OP, ":") < 0)
3338 if (read_expect_type(TEP_EVENT_DQUOTE, &token) < 0)
3342 event->print_fmt.format = token;
3343 event->print_fmt.args = NULL;
3345 /* ok to have no arg */
3346 type = read_token_item(&token);
3348 if (type == TEP_EVENT_NONE)
3351 /* Handle concatenation of print lines */
3352 if (type == TEP_EVENT_DQUOTE) {
3355 if (asprintf(&cat, "%s%s", event->print_fmt.format, token) < 0)
3358 free_token(event->print_fmt.format);
3359 event->print_fmt.format = NULL;
3364 if (test_type_token(type, token, TEP_EVENT_DELIM, ","))
3369 ret = event_read_print_args(event, &event->print_fmt.args);
3381 * tep_find_common_field - return a common field by event
3382 * @event: handle for the event
3383 * @name: the name of the common field to return
3385 * Returns a common field from the event by the given @name.
3386 * This only searches the common fields and not all field.
3388 struct tep_format_field *
3389 tep_find_common_field(struct tep_event *event, const char *name)
3391 struct tep_format_field *format;
3393 for (format = event->format.common_fields;
3394 format; format = format->next) {
3395 if (strcmp(format->name, name) == 0)
3403 * tep_find_field - find a non-common field
3404 * @event: handle for the event
3405 * @name: the name of the non-common field
3407 * Returns a non-common field by the given @name.
3408 * This does not search common fields.
3410 struct tep_format_field *
3411 tep_find_field(struct tep_event *event, const char *name)
3413 struct tep_format_field *format;
3415 for (format = event->format.fields;
3416 format; format = format->next) {
3417 if (strcmp(format->name, name) == 0)
3425 * tep_find_any_field - find any field by name
3426 * @event: handle for the event
3427 * @name: the name of the field
3429 * Returns a field by the given @name.
3430 * This searches the common field names first, then
3431 * the non-common ones if a common one was not found.
3433 struct tep_format_field *
3434 tep_find_any_field(struct tep_event *event, const char *name)
3436 struct tep_format_field *format;
3438 format = tep_find_common_field(event, name);
3441 return tep_find_field(event, name);
3445 * tep_read_number - read a number from data
3446 * @tep: a handle to the trace event parser context
3447 * @ptr: the raw data
3448 * @size: the size of the data that holds the number
3450 * Returns the number (converted to host) from the
3453 unsigned long long tep_read_number(struct tep_handle *tep,
3454 const void *ptr, int size)
3456 unsigned long long val;
3460 return *(unsigned char *)ptr;
3462 return tep_data2host2(tep, *(unsigned short *)ptr);
3464 return tep_data2host4(tep, *(unsigned int *)ptr);
3466 memcpy(&val, (ptr), sizeof(unsigned long long));
3467 return tep_data2host8(tep, val);
3475 * tep_read_number_field - read a number from data
3476 * @field: a handle to the field
3477 * @data: the raw data to read
3478 * @value: the value to place the number in
3480 * Reads raw data according to a field offset and size,
3481 * and translates it into @value.
3483 * Returns 0 on success, -1 otherwise.
3485 int tep_read_number_field(struct tep_format_field *field, const void *data,
3486 unsigned long long *value)
3490 switch (field->size) {
3495 *value = tep_read_number(field->event->tep,
3496 data + field->offset, field->size);
3503 static int get_common_info(struct tep_handle *tep,
3504 const char *type, int *offset, int *size)
3506 struct tep_event *event;
3507 struct tep_format_field *field;
3510 * All events should have the same common elements.
3511 * Pick any event to find where the type is;
3514 do_warning("no event_list!");
3518 event = tep->events[0];
3519 field = tep_find_common_field(event, type);
3523 *offset = field->offset;
3524 *size = field->size;
3529 static int __parse_common(struct tep_handle *tep, void *data,
3530 int *size, int *offset, const char *name)
3535 ret = get_common_info(tep, name, offset, size);
3539 return tep_read_number(tep, data + *offset, *size);
3542 static int trace_parse_common_type(struct tep_handle *tep, void *data)
3544 return __parse_common(tep, data,
3545 &tep->type_size, &tep->type_offset,
3549 static int parse_common_pid(struct tep_handle *tep, void *data)
3551 return __parse_common(tep, data,
3552 &tep->pid_size, &tep->pid_offset,
3556 static int parse_common_pc(struct tep_handle *tep, void *data)
3558 return __parse_common(tep, data,
3559 &tep->pc_size, &tep->pc_offset,
3560 "common_preempt_count");
3563 static int parse_common_flags(struct tep_handle *tep, void *data)
3565 return __parse_common(tep, data,
3566 &tep->flags_size, &tep->flags_offset,
3570 static int parse_common_lock_depth(struct tep_handle *tep, void *data)
3572 return __parse_common(tep, data,
3573 &tep->ld_size, &tep->ld_offset,
3574 "common_lock_depth");
3577 static int parse_common_migrate_disable(struct tep_handle *tep, void *data)
3579 return __parse_common(tep, data,
3580 &tep->ld_size, &tep->ld_offset,
3581 "common_migrate_disable");
3584 static int events_id_cmp(const void *a, const void *b);
3587 * tep_find_event - find an event by given id
3588 * @tep: a handle to the trace event parser context
3589 * @id: the id of the event
3591 * Returns an event that has a given @id.
3593 struct tep_event *tep_find_event(struct tep_handle *tep, int id)
3595 struct tep_event **eventptr;
3596 struct tep_event key;
3597 struct tep_event *pkey = &key;
3599 /* Check cache first */
3600 if (tep->last_event && tep->last_event->id == id)
3601 return tep->last_event;
3605 eventptr = bsearch(&pkey, tep->events, tep->nr_events,
3606 sizeof(*tep->events), events_id_cmp);
3609 tep->last_event = *eventptr;
3617 * tep_find_event_by_name - find an event by given name
3618 * @tep: a handle to the trace event parser context
3619 * @sys: the system name to search for
3620 * @name: the name of the event to search for
3622 * This returns an event with a given @name and under the system
3623 * @sys. If @sys is NULL the first event with @name is returned.
3626 tep_find_event_by_name(struct tep_handle *tep,
3627 const char *sys, const char *name)
3629 struct tep_event *event = NULL;
3632 if (tep->last_event &&
3633 strcmp(tep->last_event->name, name) == 0 &&
3634 (!sys || strcmp(tep->last_event->system, sys) == 0))
3635 return tep->last_event;
3637 for (i = 0; i < tep->nr_events; i++) {
3638 event = tep->events[i];
3639 if (strcmp(event->name, name) == 0) {
3642 if (strcmp(event->system, sys) == 0)
3646 if (i == tep->nr_events)
3649 tep->last_event = event;
3653 static unsigned long long
3654 eval_num_arg(void *data, int size, struct tep_event *event, struct tep_print_arg *arg)
3656 struct tep_handle *tep = event->tep;
3657 unsigned long long val = 0;
3658 unsigned long long left, right;
3659 struct tep_print_arg *typearg = NULL;
3660 struct tep_print_arg *larg;
3661 unsigned long offset;
3662 unsigned int field_size;
3664 switch (arg->type) {
3665 case TEP_PRINT_NULL:
3668 case TEP_PRINT_ATOM:
3669 return strtoull(arg->atom.atom, NULL, 0);
3670 case TEP_PRINT_FIELD:
3671 if (!arg->field.field) {
3672 arg->field.field = tep_find_any_field(event, arg->field.name);
3673 if (!arg->field.field)
3674 goto out_warning_field;
3677 /* must be a number */
3678 val = tep_read_number(tep, data + arg->field.field->offset,
3679 arg->field.field->size);
3681 case TEP_PRINT_FLAGS:
3682 case TEP_PRINT_SYMBOL:
3683 case TEP_PRINT_INT_ARRAY:
3685 case TEP_PRINT_HEX_STR:
3687 case TEP_PRINT_TYPE:
3688 val = eval_num_arg(data, size, event, arg->typecast.item);
3689 return eval_type(val, arg, 0);
3690 case TEP_PRINT_STRING:
3691 case TEP_PRINT_BSTRING:
3692 case TEP_PRINT_BITMASK:
3694 case TEP_PRINT_FUNC: {
3697 val = process_defined_func(&s, data, size, event, arg);
3698 trace_seq_destroy(&s);
3702 if (strcmp(arg->op.op, "[") == 0) {
3704 * Arrays are special, since we don't want
3705 * to read the arg as is.
3707 right = eval_num_arg(data, size, event, arg->op.right);
3709 /* handle typecasts */
3710 larg = arg->op.left;
3711 while (larg->type == TEP_PRINT_TYPE) {
3714 larg = larg->typecast.item;
3717 /* Default to long size */
3718 field_size = tep->long_size;
3720 switch (larg->type) {
3721 case TEP_PRINT_DYNAMIC_ARRAY:
3722 offset = tep_read_number(tep,
3723 data + larg->dynarray.field->offset,
3724 larg->dynarray.field->size);
3725 if (larg->dynarray.field->elementsize)
3726 field_size = larg->dynarray.field->elementsize;
3728 * The actual length of the dynamic array is stored
3729 * in the top half of the field, and the offset
3730 * is in the bottom half of the 32 bit field.
3735 case TEP_PRINT_FIELD:
3736 if (!larg->field.field) {
3738 tep_find_any_field(event, larg->field.name);
3739 if (!larg->field.field) {
3741 goto out_warning_field;
3744 field_size = larg->field.field->elementsize;
3745 offset = larg->field.field->offset +
3746 right * larg->field.field->elementsize;
3749 goto default_op; /* oops, all bets off */
3751 val = tep_read_number(tep,
3752 data + offset, field_size);
3754 val = eval_type(val, typearg, 1);
3756 } else if (strcmp(arg->op.op, "?") == 0) {
3757 left = eval_num_arg(data, size, event, arg->op.left);
3758 arg = arg->op.right;
3760 val = eval_num_arg(data, size, event, arg->op.left);
3762 val = eval_num_arg(data, size, event, arg->op.right);
3766 left = eval_num_arg(data, size, event, arg->op.left);
3767 right = eval_num_arg(data, size, event, arg->op.right);
3768 switch (arg->op.op[0]) {
3770 switch (arg->op.op[1]) {
3775 val = left != right;
3778 goto out_warning_op;
3786 val = left || right;
3792 val = left && right;
3797 switch (arg->op.op[1]) {
3802 val = left << right;
3805 val = left <= right;
3808 goto out_warning_op;
3812 switch (arg->op.op[1]) {
3817 val = left >> right;
3820 val = left >= right;
3823 goto out_warning_op;
3827 if (arg->op.op[1] != '=')
3828 goto out_warning_op;
3830 val = left == right;
3848 goto out_warning_op;
3851 case TEP_PRINT_DYNAMIC_ARRAY_LEN:
3852 offset = tep_read_number(tep,
3853 data + arg->dynarray.field->offset,
3854 arg->dynarray.field->size);
3856 * The total allocated length of the dynamic array is
3857 * stored in the top half of the field, and the offset
3858 * is in the bottom half of the 32 bit field.
3860 val = (unsigned long long)(offset >> 16);
3862 case TEP_PRINT_DYNAMIC_ARRAY:
3863 /* Without [], we pass the address to the dynamic data */
3864 offset = tep_read_number(tep,
3865 data + arg->dynarray.field->offset,
3866 arg->dynarray.field->size);
3868 * The total allocated length of the dynamic array is
3869 * stored in the top half of the field, and the offset
3870 * is in the bottom half of the 32 bit field.
3873 val = (unsigned long long)((unsigned long)data + offset);
3875 default: /* not sure what to do there */
3881 do_warning_event(event, "%s: unknown op '%s'", __func__, arg->op.op);
3885 do_warning_event(event, "%s: field %s not found",
3886 __func__, arg->field.name);
3892 unsigned long long value;
3895 static const struct flag flags[] = {
3896 { "HI_SOFTIRQ", 0 },
3897 { "TIMER_SOFTIRQ", 1 },
3898 { "NET_TX_SOFTIRQ", 2 },
3899 { "NET_RX_SOFTIRQ", 3 },
3900 { "BLOCK_SOFTIRQ", 4 },
3901 { "IRQ_POLL_SOFTIRQ", 5 },
3902 { "TASKLET_SOFTIRQ", 6 },
3903 { "SCHED_SOFTIRQ", 7 },
3904 { "HRTIMER_SOFTIRQ", 8 },
3905 { "RCU_SOFTIRQ", 9 },
3907 { "HRTIMER_NORESTART", 0 },
3908 { "HRTIMER_RESTART", 1 },
3911 static long long eval_flag(const char *flag)
3916 * Some flags in the format files do not get converted.
3917 * If the flag is not numeric, see if it is something that
3918 * we already know about.
3920 if (isdigit(flag[0]))
3921 return strtoull(flag, NULL, 0);
3923 for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
3924 if (strcmp(flags[i].name, flag) == 0)
3925 return flags[i].value;
3930 static void print_str_to_seq(struct trace_seq *s, const char *format,
3931 int len_arg, const char *str)
3934 trace_seq_printf(s, format, len_arg, str);
3936 trace_seq_printf(s, format, str);
3939 static void print_bitmask_to_seq(struct tep_handle *tep,
3940 struct trace_seq *s, const char *format,
3941 int len_arg, const void *data, int size)
3943 int nr_bits = size * 8;
3944 int str_size = (nr_bits + 3) / 4;
3952 * The kernel likes to put in commas every 32 bits, we
3955 str_size += (nr_bits - 1) / 32;
3957 str = malloc(str_size + 1);
3959 do_warning("%s: not enough memory!", __func__);
3964 /* Start out with -2 for the two chars per byte */
3965 for (i = str_size - 2; i >= 0; i -= 2) {
3967 * data points to a bit mask of size bytes.
3968 * In the kernel, this is an array of long words, thus
3969 * endianness is very important.
3971 if (tep->file_bigendian)
3972 index = size - (len + 1);
3976 snprintf(buf, 3, "%02x", *((unsigned char *)data + index));
3977 memcpy(str + i, buf, 2);
3979 if (!(len & 3) && i > 0) {
3986 trace_seq_printf(s, format, len_arg, str);
3988 trace_seq_printf(s, format, str);
3993 static void print_str_arg(struct trace_seq *s, void *data, int size,
3994 struct tep_event *event, const char *format,
3995 int len_arg, struct tep_print_arg *arg)
3997 struct tep_handle *tep = event->tep;
3998 struct tep_print_flag_sym *flag;
3999 struct tep_format_field *field;
4000 struct printk_map *printk;
4001 long long val, fval;
4002 unsigned long long addr;
4008 switch (arg->type) {
4009 case TEP_PRINT_NULL:
4012 case TEP_PRINT_ATOM:
4013 print_str_to_seq(s, format, len_arg, arg->atom.atom);
4015 case TEP_PRINT_FIELD:
4016 field = arg->field.field;
4018 field = tep_find_any_field(event, arg->field.name);
4020 str = arg->field.name;
4021 goto out_warning_field;
4023 arg->field.field = field;
4025 /* Zero sized fields, mean the rest of the data */
4026 len = field->size ? : size - field->offset;
4029 * Some events pass in pointers. If this is not an array
4030 * and the size is the same as long_size, assume that it
4033 if (!(field->flags & TEP_FIELD_IS_ARRAY) &&
4034 field->size == tep->long_size) {
4036 /* Handle heterogeneous recording and processing
4040 * Traces recorded on 32-bit devices (32-bit
4041 * addressing) and processed on 64-bit devices:
4042 * In this case, only 32 bits should be read.
4045 * Traces recorded on 64 bit devices and processed
4046 * on 32-bit devices:
4047 * In this case, 64 bits must be read.
4049 addr = (tep->long_size == 8) ?
4050 *(unsigned long long *)(data + field->offset) :
4051 (unsigned long long)*(unsigned int *)(data + field->offset);
4053 /* Check if it matches a print format */
4054 printk = find_printk(tep, addr);
4056 trace_seq_puts(s, printk->printk);
4058 trace_seq_printf(s, "%llx", addr);
4061 str = malloc(len + 1);
4063 do_warning_event(event, "%s: not enough memory!",
4067 memcpy(str, data + field->offset, len);
4069 print_str_to_seq(s, format, len_arg, str);
4072 case TEP_PRINT_FLAGS:
4073 val = eval_num_arg(data, size, event, arg->flags.field);
4075 for (flag = arg->flags.flags; flag; flag = flag->next) {
4076 fval = eval_flag(flag->value);
4077 if (!val && fval < 0) {
4078 print_str_to_seq(s, format, len_arg, flag->str);
4081 if (fval > 0 && (val & fval) == fval) {
4082 if (print && arg->flags.delim)
4083 trace_seq_puts(s, arg->flags.delim);
4084 print_str_to_seq(s, format, len_arg, flag->str);
4090 if (print && arg->flags.delim)
4091 trace_seq_puts(s, arg->flags.delim);
4092 trace_seq_printf(s, "0x%llx", val);
4095 case TEP_PRINT_SYMBOL:
4096 val = eval_num_arg(data, size, event, arg->symbol.field);
4097 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
4098 fval = eval_flag(flag->value);
4100 print_str_to_seq(s, format, len_arg, flag->str);
4105 trace_seq_printf(s, "0x%llx", val);
4108 case TEP_PRINT_HEX_STR:
4109 if (arg->hex.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
4110 unsigned long offset;
4111 offset = tep_read_number(tep,
4112 data + arg->hex.field->dynarray.field->offset,
4113 arg->hex.field->dynarray.field->size);
4114 hex = data + (offset & 0xffff);
4116 field = arg->hex.field->field.field;
4118 str = arg->hex.field->field.name;
4119 field = tep_find_any_field(event, str);
4121 goto out_warning_field;
4122 arg->hex.field->field.field = field;
4124 hex = data + field->offset;
4126 len = eval_num_arg(data, size, event, arg->hex.size);
4127 for (i = 0; i < len; i++) {
4128 if (i && arg->type == TEP_PRINT_HEX)
4129 trace_seq_putc(s, ' ');
4130 trace_seq_printf(s, "%02x", hex[i]);
4134 case TEP_PRINT_INT_ARRAY: {
4138 if (arg->int_array.field->type == TEP_PRINT_DYNAMIC_ARRAY) {
4139 unsigned long offset;
4140 struct tep_format_field *field =
4141 arg->int_array.field->dynarray.field;
4142 offset = tep_read_number(tep,
4143 data + field->offset,
4145 num = data + (offset & 0xffff);
4147 field = arg->int_array.field->field.field;
4149 str = arg->int_array.field->field.name;
4150 field = tep_find_any_field(event, str);
4152 goto out_warning_field;
4153 arg->int_array.field->field.field = field;
4155 num = data + field->offset;
4157 len = eval_num_arg(data, size, event, arg->int_array.count);
4158 el_size = eval_num_arg(data, size, event,
4159 arg->int_array.el_size);
4160 for (i = 0; i < len; i++) {
4162 trace_seq_putc(s, ' ');
4165 trace_seq_printf(s, "%u", *(uint8_t *)num);
4166 } else if (el_size == 2) {
4167 trace_seq_printf(s, "%u", *(uint16_t *)num);
4168 } else if (el_size == 4) {
4169 trace_seq_printf(s, "%u", *(uint32_t *)num);
4170 } else if (el_size == 8) {
4171 trace_seq_printf(s, "%"PRIu64, *(uint64_t *)num);
4173 trace_seq_printf(s, "BAD SIZE:%d 0x%x",
4174 el_size, *(uint8_t *)num);
4182 case TEP_PRINT_TYPE:
4184 case TEP_PRINT_STRING: {
4187 if (arg->string.offset == -1) {
4188 struct tep_format_field *f;
4190 f = tep_find_any_field(event, arg->string.string);
4191 arg->string.offset = f->offset;
4193 str_offset = tep_data2host4(tep, *(unsigned int *)(data + arg->string.offset));
4194 str_offset &= 0xffff;
4195 print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
4198 case TEP_PRINT_BSTRING:
4199 print_str_to_seq(s, format, len_arg, arg->string.string);
4201 case TEP_PRINT_BITMASK: {
4205 if (arg->bitmask.offset == -1) {
4206 struct tep_format_field *f;
4208 f = tep_find_any_field(event, arg->bitmask.bitmask);
4209 arg->bitmask.offset = f->offset;
4211 bitmask_offset = tep_data2host4(tep, *(unsigned int *)(data + arg->bitmask.offset));
4212 bitmask_size = bitmask_offset >> 16;
4213 bitmask_offset &= 0xffff;
4214 print_bitmask_to_seq(tep, s, format, len_arg,
4215 data + bitmask_offset, bitmask_size);
4220 * The only op for string should be ? :
4222 if (arg->op.op[0] != '?')
4224 val = eval_num_arg(data, size, event, arg->op.left);
4226 print_str_arg(s, data, size, event,
4227 format, len_arg, arg->op.right->op.left);
4229 print_str_arg(s, data, size, event,
4230 format, len_arg, arg->op.right->op.right);
4232 case TEP_PRINT_FUNC:
4233 process_defined_func(s, data, size, event, arg);
4243 do_warning_event(event, "%s: field %s not found",
4244 __func__, arg->field.name);
4247 static unsigned long long
4248 process_defined_func(struct trace_seq *s, void *data, int size,
4249 struct tep_event *event, struct tep_print_arg *arg)
4251 struct tep_function_handler *func_handle = arg->func.func;
4252 struct func_params *param;
4253 unsigned long long *args;
4254 unsigned long long ret;
4255 struct tep_print_arg *farg;
4256 struct trace_seq str;
4258 struct save_str *next;
4260 } *strings = NULL, *string;
4263 if (!func_handle->nr_args) {
4264 ret = (*func_handle->func)(s, NULL);
4268 farg = arg->func.args;
4269 param = func_handle->params;
4272 args = malloc(sizeof(*args) * func_handle->nr_args);
4276 for (i = 0; i < func_handle->nr_args; i++) {
4277 switch (param->type) {
4278 case TEP_FUNC_ARG_INT:
4279 case TEP_FUNC_ARG_LONG:
4280 case TEP_FUNC_ARG_PTR:
4281 args[i] = eval_num_arg(data, size, event, farg);
4283 case TEP_FUNC_ARG_STRING:
4284 trace_seq_init(&str);
4285 print_str_arg(&str, data, size, event, "%s", -1, farg);
4286 trace_seq_terminate(&str);
4287 string = malloc(sizeof(*string));
4289 do_warning_event(event, "%s(%d): malloc str",
4290 __func__, __LINE__);
4293 string->next = strings;
4294 string->str = strdup(str.buffer);
4297 do_warning_event(event, "%s(%d): malloc str",
4298 __func__, __LINE__);
4301 args[i] = (uintptr_t)string->str;
4303 trace_seq_destroy(&str);
4307 * Something went totally wrong, this is not
4308 * an input error, something in this code broke.
4310 do_warning_event(event, "Unexpected end of arguments\n");
4314 param = param->next;
4317 ret = (*func_handle->func)(s, args);
4322 strings = string->next;
4328 /* TBD : handle return type here */
4332 static void free_args(struct tep_print_arg *args)
4334 struct tep_print_arg *next;
4344 static struct tep_print_arg *make_bprint_args(char *fmt, void *data, int size, struct tep_event *event)
4346 struct tep_handle *tep = event->tep;
4347 struct tep_format_field *field, *ip_field;
4348 struct tep_print_arg *args, *arg, **next;
4349 unsigned long long ip, val;
4354 field = tep->bprint_buf_field;
4355 ip_field = tep->bprint_ip_field;
4358 field = tep_find_field(event, "buf");
4360 do_warning_event(event, "can't find buffer field for binary printk");
4363 ip_field = tep_find_field(event, "ip");
4365 do_warning_event(event, "can't find ip field for binary printk");
4368 tep->bprint_buf_field = field;
4369 tep->bprint_ip_field = ip_field;
4372 ip = tep_read_number(tep, data + ip_field->offset, ip_field->size);
4375 * The first arg is the IP pointer.
4379 do_warning_event(event, "%s(%d): not enough memory!",
4380 __func__, __LINE__);
4387 arg->type = TEP_PRINT_ATOM;
4389 if (asprintf(&arg->atom.atom, "%lld", ip) < 0)
4392 /* skip the first "%ps: " */
4393 for (ptr = fmt + 5, bptr = data + field->offset;
4394 bptr < data + size && *ptr; ptr++) {
4419 if (isalnum(ptr[1])) {
4421 /* Check for special pointers */
4430 * Pre-5.5 kernels use %pf and
4431 * %pF for printing symbols
4432 * while kernels since 5.5 use
4433 * %pfw for fwnodes. So check
4434 * %p[fF] isn't followed by 'w'.
4441 * Older kernels do not process
4442 * dereferenced pointers.
4443 * Only process if the pointer
4444 * value is a printable.
4446 if (isprint(*(char *)bptr))
4447 goto process_string;
4462 vsize = tep->long_size;
4476 /* the pointers are always 4 bytes aligned */
4477 bptr = (void *)(((unsigned long)bptr + 3) &
4479 val = tep_read_number(tep, bptr, vsize);
4483 do_warning_event(event, "%s(%d): not enough memory!",
4484 __func__, __LINE__);
4488 arg->type = TEP_PRINT_ATOM;
4489 if (asprintf(&arg->atom.atom, "%lld", val) < 0) {
4496 * The '*' case means that an arg is used as the length.
4497 * We need to continue to figure out for what.
4507 do_warning_event(event, "%s(%d): not enough memory!",
4508 __func__, __LINE__);
4512 arg->type = TEP_PRINT_BSTRING;
4513 arg->string.string = strdup(bptr);
4514 if (!arg->string.string)
4516 bptr += strlen(bptr) + 1;
4533 get_bprint_format(void *data, int size __maybe_unused,
4534 struct tep_event *event)
4536 struct tep_handle *tep = event->tep;
4537 unsigned long long addr;
4538 struct tep_format_field *field;
4539 struct printk_map *printk;
4542 field = tep->bprint_fmt_field;
4545 field = tep_find_field(event, "fmt");
4547 do_warning_event(event, "can't find format field for binary printk");
4550 tep->bprint_fmt_field = field;
4553 addr = tep_read_number(tep, data + field->offset, field->size);
4555 printk = find_printk(tep, addr);
4557 if (asprintf(&format, "%%ps: (NO FORMAT FOUND at %llx)\n", addr) < 0)
4562 if (asprintf(&format, "%s: %s", "%ps", printk->printk) < 0)
4568 static void print_mac_arg(struct trace_seq *s, int mac, void *data, int size,
4569 struct tep_event *event, struct tep_print_arg *arg)
4572 const char *fmt = "%.2x:%.2x:%.2x:%.2x:%.2x:%.2x";
4574 if (arg->type == TEP_PRINT_FUNC) {
4575 process_defined_func(s, data, size, event, arg);
4579 if (arg->type != TEP_PRINT_FIELD) {
4580 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d",
4586 fmt = "%.2x%.2x%.2x%.2x%.2x%.2x";
4587 if (!arg->field.field) {
4589 tep_find_any_field(event, arg->field.name);
4590 if (!arg->field.field) {
4591 do_warning_event(event, "%s: field %s not found",
4592 __func__, arg->field.name);
4596 if (arg->field.field->size != 6) {
4597 trace_seq_printf(s, "INVALIDMAC");
4600 buf = data + arg->field.field->offset;
4601 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
4604 static void print_ip4_addr(struct trace_seq *s, char i, unsigned char *buf)
4609 fmt = "%03d.%03d.%03d.%03d";
4611 fmt = "%d.%d.%d.%d";
4613 trace_seq_printf(s, fmt, buf[0], buf[1], buf[2], buf[3]);
4616 static inline bool ipv6_addr_v4mapped(const struct in6_addr *a)
4618 return ((unsigned long)(a->s6_addr32[0] | a->s6_addr32[1]) |
4619 (unsigned long)(a->s6_addr32[2] ^ htonl(0x0000ffff))) == 0UL;
4622 static inline bool ipv6_addr_is_isatap(const struct in6_addr *addr)
4624 return (addr->s6_addr32[2] | htonl(0x02000000)) == htonl(0x02005EFE);
4627 static void print_ip6c_addr(struct trace_seq *s, unsigned char *addr)
4630 unsigned char zerolength[8];
4635 bool needcolon = false;
4637 struct in6_addr in6;
4639 memcpy(&in6, addr, sizeof(struct in6_addr));
4641 useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6);
4643 memset(zerolength, 0, sizeof(zerolength));
4650 /* find position of longest 0 run */
4651 for (i = 0; i < range; i++) {
4652 for (j = i; j < range; j++) {
4653 if (in6.s6_addr16[j] != 0)
4658 for (i = 0; i < range; i++) {
4659 if (zerolength[i] > longest) {
4660 longest = zerolength[i];
4664 if (longest == 1) /* don't compress a single 0 */
4668 for (i = 0; i < range; i++) {
4669 if (i == colonpos) {
4670 if (needcolon || i == 0)
4671 trace_seq_printf(s, ":");
4672 trace_seq_printf(s, ":");
4678 trace_seq_printf(s, ":");
4681 /* hex u16 without leading 0s */
4682 word = ntohs(in6.s6_addr16[i]);
4686 trace_seq_printf(s, "%x%02x", hi, lo);
4688 trace_seq_printf(s, "%x", lo);
4695 trace_seq_printf(s, ":");
4696 print_ip4_addr(s, 'I', &in6.s6_addr[12]);
4702 static void print_ip6_addr(struct trace_seq *s, char i, unsigned char *buf)
4706 for (j = 0; j < 16; j += 2) {
4707 trace_seq_printf(s, "%02x%02x", buf[j], buf[j+1]);
4708 if (i == 'I' && j < 14)
4709 trace_seq_printf(s, ":");
4714 * %pi4 print an IPv4 address with leading zeros
4715 * %pI4 print an IPv4 address without leading zeros
4716 * %pi6 print an IPv6 address without colons
4717 * %pI6 print an IPv6 address with colons
4718 * %pI6c print an IPv6 address in compressed form with colons
4719 * %pISpc print an IP address based on sockaddr; p adds port.
4721 static int print_ipv4_arg(struct trace_seq *s, const char *ptr, char i,
4722 void *data, int size, struct tep_event *event,
4723 struct tep_print_arg *arg)
4727 if (arg->type == TEP_PRINT_FUNC) {
4728 process_defined_func(s, data, size, event, arg);
4732 if (arg->type != TEP_PRINT_FIELD) {
4733 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4737 if (!arg->field.field) {
4739 tep_find_any_field(event, arg->field.name);
4740 if (!arg->field.field) {
4741 do_warning("%s: field %s not found",
4742 __func__, arg->field.name);
4747 buf = data + arg->field.field->offset;
4749 if (arg->field.field->size != 4) {
4750 trace_seq_printf(s, "INVALIDIPv4");
4753 print_ip4_addr(s, i, buf);
4758 static int print_ipv6_arg(struct trace_seq *s, const char *ptr, char i,
4759 void *data, int size, struct tep_event *event,
4760 struct tep_print_arg *arg)
4767 if (i == 'I' && *ptr == 'c') {
4773 if (arg->type == TEP_PRINT_FUNC) {
4774 process_defined_func(s, data, size, event, arg);
4778 if (arg->type != TEP_PRINT_FIELD) {
4779 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4783 if (!arg->field.field) {
4785 tep_find_any_field(event, arg->field.name);
4786 if (!arg->field.field) {
4787 do_warning("%s: field %s not found",
4788 __func__, arg->field.name);
4793 buf = data + arg->field.field->offset;
4795 if (arg->field.field->size != 16) {
4796 trace_seq_printf(s, "INVALIDIPv6");
4801 print_ip6c_addr(s, buf);
4803 print_ip6_addr(s, i, buf);
4808 static int print_ipsa_arg(struct trace_seq *s, const char *ptr, char i,
4809 void *data, int size, struct tep_event *event,
4810 struct tep_print_arg *arg)
4812 char have_c = 0, have_p = 0;
4814 struct sockaddr_storage *sa;
4831 if (arg->type == TEP_PRINT_FUNC) {
4832 process_defined_func(s, data, size, event, arg);
4836 if (arg->type != TEP_PRINT_FIELD) {
4837 trace_seq_printf(s, "ARG TYPE NOT FIELD BUT %d", arg->type);
4841 if (!arg->field.field) {
4843 tep_find_any_field(event, arg->field.name);
4844 if (!arg->field.field) {
4845 do_warning("%s: field %s not found",
4846 __func__, arg->field.name);
4851 sa = (struct sockaddr_storage *) (data + arg->field.field->offset);
4853 if (sa->ss_family == AF_INET) {
4854 struct sockaddr_in *sa4 = (struct sockaddr_in *) sa;
4856 if (arg->field.field->size < sizeof(struct sockaddr_in)) {
4857 trace_seq_printf(s, "INVALIDIPv4");
4861 print_ip4_addr(s, i, (unsigned char *) &sa4->sin_addr);
4863 trace_seq_printf(s, ":%d", ntohs(sa4->sin_port));
4866 } else if (sa->ss_family == AF_INET6) {
4867 struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) sa;
4869 if (arg->field.field->size < sizeof(struct sockaddr_in6)) {
4870 trace_seq_printf(s, "INVALIDIPv6");
4875 trace_seq_printf(s, "[");
4877 buf = (unsigned char *) &sa6->sin6_addr;
4879 print_ip6c_addr(s, buf);
4881 print_ip6_addr(s, i, buf);
4884 trace_seq_printf(s, "]:%d", ntohs(sa6->sin6_port));
4890 static int print_ip_arg(struct trace_seq *s, const char *ptr,
4891 void *data, int size, struct tep_event *event,
4892 struct tep_print_arg *arg)
4894 char i = *ptr; /* 'i' or 'I' */
4907 rc += print_ipv4_arg(s, ptr, i, data, size, event, arg);
4910 rc += print_ipv6_arg(s, ptr, i, data, size, event, arg);
4913 rc += print_ipsa_arg(s, ptr, i, data, size, event, arg);
4922 static int is_printable_array(char *p, unsigned int len)
4926 for (i = 0; i < len && p[i]; i++)
4927 if (!isprint(p[i]) && !isspace(p[i]))
4932 void tep_print_field(struct trace_seq *s, void *data,
4933 struct tep_format_field *field)
4935 unsigned long long val;
4936 unsigned int offset, len, i;
4937 struct tep_handle *tep = field->event->tep;
4939 if (field->flags & TEP_FIELD_IS_ARRAY) {
4940 offset = field->offset;
4942 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
4943 val = tep_read_number(tep, data + offset, len);
4948 if (field->flags & TEP_FIELD_IS_STRING &&
4949 is_printable_array(data + offset, len)) {
4950 trace_seq_printf(s, "%s", (char *)data + offset);
4952 trace_seq_puts(s, "ARRAY[");
4953 for (i = 0; i < len; i++) {
4955 trace_seq_puts(s, ", ");
4956 trace_seq_printf(s, "%02x",
4957 *((unsigned char *)data + offset + i));
4959 trace_seq_putc(s, ']');
4960 field->flags &= ~TEP_FIELD_IS_STRING;
4963 val = tep_read_number(tep, data + field->offset,
4965 if (field->flags & TEP_FIELD_IS_POINTER) {
4966 trace_seq_printf(s, "0x%llx", val);
4967 } else if (field->flags & TEP_FIELD_IS_SIGNED) {
4968 switch (field->size) {
4971 * If field is long then print it in hex.
4972 * A long usually stores pointers.
4974 if (field->flags & TEP_FIELD_IS_LONG)
4975 trace_seq_printf(s, "0x%x", (int)val);
4977 trace_seq_printf(s, "%d", (int)val);
4980 trace_seq_printf(s, "%2d", (short)val);
4983 trace_seq_printf(s, "%1d", (char)val);
4986 trace_seq_printf(s, "%lld", val);
4989 if (field->flags & TEP_FIELD_IS_LONG)
4990 trace_seq_printf(s, "0x%llx", val);
4992 trace_seq_printf(s, "%llu", val);
4997 void tep_print_fields(struct trace_seq *s, void *data,
4998 int size __maybe_unused, struct tep_event *event)
5000 struct tep_format_field *field;
5002 field = event->format.fields;
5004 trace_seq_printf(s, " %s=", field->name);
5005 tep_print_field(s, data, field);
5006 field = field->next;
5010 static void pretty_print(struct trace_seq *s, void *data, int size, struct tep_event *event)
5012 struct tep_handle *tep = event->tep;
5013 struct tep_print_fmt *print_fmt = &event->print_fmt;
5014 struct tep_print_arg *arg = print_fmt->args;
5015 struct tep_print_arg *args = NULL;
5016 const char *ptr = print_fmt->format;
5017 unsigned long long val;
5018 struct func_map *func;
5019 const char *saveptr;
5021 char *bprint_fmt = NULL;
5029 if (event->flags & TEP_EVENT_FL_FAILED) {
5030 trace_seq_printf(s, "[FAILED TO PARSE]");
5031 tep_print_fields(s, data, size, event);
5035 if (event->flags & TEP_EVENT_FL_ISBPRINT) {
5036 bprint_fmt = get_bprint_format(data, size, event);
5037 args = make_bprint_args(bprint_fmt, data, size, event);
5042 for (; *ptr; ptr++) {
5048 trace_seq_putc(s, '\n');
5051 trace_seq_putc(s, '\t');
5054 trace_seq_putc(s, '\r');
5057 trace_seq_putc(s, '\\');
5060 trace_seq_putc(s, *ptr);
5064 } else if (*ptr == '%') {
5072 trace_seq_putc(s, '%');
5075 /* FIXME: need to handle properly */
5087 /* The argument is the length. */
5089 do_warning_event(event, "no argument match");
5090 event->flags |= TEP_EVENT_FL_FAILED;
5093 len_arg = eval_num_arg(data, size, event, arg);
5104 if (tep->long_size == 4)
5109 if (isalnum(ptr[1]))
5112 if (arg->type == TEP_PRINT_BSTRING) {
5113 trace_seq_puts(s, arg->string.string);
5118 if (*ptr == 'F' || *ptr == 'f' ||
5119 *ptr == 'S' || *ptr == 's') {
5121 } else if (*ptr == 'M' || *ptr == 'm') {
5122 print_mac_arg(s, *ptr, data, size, event, arg);
5125 } else if (*ptr == 'I' || *ptr == 'i') {
5128 n = print_ip_arg(s, ptr, data, size, event, arg);
5144 do_warning_event(event, "no argument match");
5145 event->flags |= TEP_EVENT_FL_FAILED;
5149 len = ((unsigned long)ptr + 1) -
5150 (unsigned long)saveptr;
5152 /* should never happen */
5154 do_warning_event(event, "bad format!");
5155 event->flags |= TEP_EVENT_FL_FAILED;
5159 memcpy(format, saveptr, len);
5162 val = eval_num_arg(data, size, event, arg);
5166 func = find_func(tep, val);
5168 trace_seq_puts(s, func->func);
5169 if (show_func == 'F')
5176 if (tep->long_size == 8 && ls == 1 &&
5177 sizeof(long) != 8) {
5180 /* make %l into %ll */
5181 if (ls == 1 && (p = strchr(format, 'l')))
5182 memmove(p+1, p, strlen(p)+1);
5183 else if (strcmp(format, "%p") == 0)
5184 strcpy(format, "0x%llx");
5190 trace_seq_printf(s, format, len_arg, (char)val);
5192 trace_seq_printf(s, format, (char)val);
5196 trace_seq_printf(s, format, len_arg, (short)val);
5198 trace_seq_printf(s, format, (short)val);
5202 trace_seq_printf(s, format, len_arg, (int)val);
5204 trace_seq_printf(s, format, (int)val);
5208 trace_seq_printf(s, format, len_arg, (long)val);
5210 trace_seq_printf(s, format, (long)val);
5214 trace_seq_printf(s, format, len_arg,
5217 trace_seq_printf(s, format, (long long)val);
5220 do_warning_event(event, "bad count (%d)", ls);
5221 event->flags |= TEP_EVENT_FL_FAILED;
5226 do_warning_event(event, "no matching argument");
5227 event->flags |= TEP_EVENT_FL_FAILED;
5231 len = ((unsigned long)ptr + 1) -
5232 (unsigned long)saveptr;
5234 /* should never happen */
5236 do_warning_event(event, "bad format!");
5237 event->flags |= TEP_EVENT_FL_FAILED;
5241 memcpy(format, saveptr, len);
5245 /* Use helper trace_seq */
5247 print_str_arg(&p, data, size, event,
5248 format, len_arg, arg);
5249 trace_seq_terminate(&p);
5250 trace_seq_puts(s, p.buffer);
5251 trace_seq_destroy(&p);
5255 trace_seq_printf(s, ">%c<", *ptr);
5259 trace_seq_putc(s, *ptr);
5262 if (event->flags & TEP_EVENT_FL_FAILED) {
5264 trace_seq_printf(s, "[FAILED TO PARSE]");
5274 * This parses out the Latency format (interrupts disabled,
5275 * need rescheduling, in hard/soft interrupt, preempt count
5276 * and lock depth) and places it into the trace_seq.
5278 static void data_latency_format(struct tep_handle *tep, struct trace_seq *s,
5279 char *format, struct tep_record *record)
5281 static int check_lock_depth = 1;
5282 static int check_migrate_disable = 1;
5283 static int lock_depth_exists;
5284 static int migrate_disable_exists;
5285 unsigned int lat_flags;
5286 struct trace_seq sq;
5289 int migrate_disable = 0;
5292 void *data = record->data;
5294 trace_seq_init(&sq);
5295 lat_flags = parse_common_flags(tep, data);
5296 pc = parse_common_pc(tep, data);
5297 /* lock_depth may not always exist */
5298 if (lock_depth_exists)
5299 lock_depth = parse_common_lock_depth(tep, data);
5300 else if (check_lock_depth) {
5301 lock_depth = parse_common_lock_depth(tep, data);
5303 check_lock_depth = 0;
5305 lock_depth_exists = 1;
5308 /* migrate_disable may not always exist */
5309 if (migrate_disable_exists)
5310 migrate_disable = parse_common_migrate_disable(tep, data);
5311 else if (check_migrate_disable) {
5312 migrate_disable = parse_common_migrate_disable(tep, data);
5313 if (migrate_disable < 0)
5314 check_migrate_disable = 0;
5316 migrate_disable_exists = 1;
5319 hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
5320 softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
5322 trace_seq_printf(&sq, "%c%c%c",
5323 (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
5324 (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
5326 (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
5328 (hardirq && softirq) ? 'H' :
5329 hardirq ? 'h' : softirq ? 's' : '.');
5332 trace_seq_printf(&sq, "%x", pc);
5334 trace_seq_printf(&sq, ".");
5336 if (migrate_disable_exists) {
5337 if (migrate_disable < 0)
5338 trace_seq_printf(&sq, ".");
5340 trace_seq_printf(&sq, "%d", migrate_disable);
5343 if (lock_depth_exists) {
5345 trace_seq_printf(&sq, ".");
5347 trace_seq_printf(&sq, "%d", lock_depth);
5350 if (sq.state == TRACE_SEQ__MEM_ALLOC_FAILED) {
5351 s->state = TRACE_SEQ__MEM_ALLOC_FAILED;
5355 trace_seq_terminate(&sq);
5356 trace_seq_puts(s, sq.buffer);
5357 trace_seq_destroy(&sq);
5358 trace_seq_terminate(s);
5362 * tep_data_type - parse out the given event type
5363 * @tep: a handle to the trace event parser context
5364 * @rec: the record to read from
5366 * This returns the event id from the @rec.
5368 int tep_data_type(struct tep_handle *tep, struct tep_record *rec)
5370 return trace_parse_common_type(tep, rec->data);
5374 * tep_data_pid - parse the PID from record
5375 * @tep: a handle to the trace event parser context
5376 * @rec: the record to parse
5378 * This returns the PID from a record.
5380 int tep_data_pid(struct tep_handle *tep, struct tep_record *rec)
5382 return parse_common_pid(tep, rec->data);
5386 * tep_data_preempt_count - parse the preempt count from the record
5387 * @tep: a handle to the trace event parser context
5388 * @rec: the record to parse
5390 * This returns the preempt count from a record.
5392 int tep_data_preempt_count(struct tep_handle *tep, struct tep_record *rec)
5394 return parse_common_pc(tep, rec->data);
5398 * tep_data_flags - parse the latency flags from the record
5399 * @tep: a handle to the trace event parser context
5400 * @rec: the record to parse
5402 * This returns the latency flags from a record.
5404 * Use trace_flag_type enum for the flags (see event-parse.h).
5406 int tep_data_flags(struct tep_handle *tep, struct tep_record *rec)
5408 return parse_common_flags(tep, rec->data);
5412 * tep_data_comm_from_pid - return the command line from PID
5413 * @tep: a handle to the trace event parser context
5414 * @pid: the PID of the task to search for
5416 * This returns a pointer to the command line that has the given
5419 const char *tep_data_comm_from_pid(struct tep_handle *tep, int pid)
5423 comm = find_cmdline(tep, pid);
5427 static struct tep_cmdline *
5428 pid_from_cmdlist(struct tep_handle *tep, const char *comm, struct tep_cmdline *next)
5430 struct cmdline_list *cmdlist = (struct cmdline_list *)next;
5433 cmdlist = cmdlist->next;
5435 cmdlist = tep->cmdlist;
5437 while (cmdlist && strcmp(cmdlist->comm, comm) != 0)
5438 cmdlist = cmdlist->next;
5440 return (struct tep_cmdline *)cmdlist;
5444 * tep_data_pid_from_comm - return the pid from a given comm
5445 * @tep: a handle to the trace event parser context
5446 * @comm: the cmdline to find the pid from
5447 * @next: the cmdline structure to find the next comm
5449 * This returns the cmdline structure that holds a pid for a given
5450 * comm, or NULL if none found. As there may be more than one pid for
5451 * a given comm, the result of this call can be passed back into
5452 * a recurring call in the @next parameter, and then it will find the
5454 * Also, it does a linear search, so it may be slow.
5456 struct tep_cmdline *tep_data_pid_from_comm(struct tep_handle *tep, const char *comm,
5457 struct tep_cmdline *next)
5459 struct tep_cmdline *cmdline;
5462 * If the cmdlines have not been converted yet, then use
5466 return pid_from_cmdlist(tep, comm, next);
5470 * The next pointer could have been still from
5471 * a previous call before cmdlines were created
5473 if (next < tep->cmdlines ||
5474 next >= tep->cmdlines + tep->cmdline_count)
5481 cmdline = tep->cmdlines;
5483 while (cmdline < tep->cmdlines + tep->cmdline_count) {
5484 if (strcmp(cmdline->comm, comm) == 0)
5492 * tep_cmdline_pid - return the pid associated to a given cmdline
5493 * @tep: a handle to the trace event parser context
5494 * @cmdline: The cmdline structure to get the pid from
5496 * Returns the pid for a give cmdline. If @cmdline is NULL, then
5499 int tep_cmdline_pid(struct tep_handle *tep, struct tep_cmdline *cmdline)
5501 struct cmdline_list *cmdlist = (struct cmdline_list *)cmdline;
5507 * If cmdlines have not been created yet, or cmdline is
5508 * not part of the array, then treat it as a cmdlist instead.
5510 if (!tep->cmdlines ||
5511 cmdline < tep->cmdlines ||
5512 cmdline >= tep->cmdlines + tep->cmdline_count)
5513 return cmdlist->pid;
5515 return cmdline->pid;
5519 * This parses the raw @data using the given @event information and
5520 * writes the print format into the trace_seq.
5522 static void print_event_info(struct trace_seq *s, char *format, bool raw,
5523 struct tep_event *event, struct tep_record *record)
5525 int print_pretty = 1;
5527 if (raw || (event->flags & TEP_EVENT_FL_PRINTRAW))
5528 tep_print_fields(s, record->data, record->size, event);
5531 if (event->handler && !(event->flags & TEP_EVENT_FL_NOHANDLE))
5532 print_pretty = event->handler(s, record, event,
5536 pretty_print(s, record->data, record->size, event);
5539 trace_seq_terminate(s);
5543 * tep_find_event_by_record - return the event from a given record
5544 * @tep: a handle to the trace event parser context
5545 * @record: The record to get the event from
5547 * Returns the associated event for a given record, or NULL if non is
5551 tep_find_event_by_record(struct tep_handle *tep, struct tep_record *record)
5555 if (record->size < 0) {
5556 do_warning("ug! negative record size %d", record->size);
5560 type = trace_parse_common_type(tep, record->data);
5562 return tep_find_event(tep, type);
5566 * Writes the timestamp of the record into @s. Time divisor and precision can be
5567 * specified as part of printf @format string. Example:
5568 * "%3.1000d" - divide the time by 1000 and print the first 3 digits
5569 * before the dot. Thus, the timestamp "123456000" will be printed as
5572 static void print_event_time(struct tep_handle *tep, struct trace_seq *s,
5573 char *format, struct tep_event *event,
5574 struct tep_record *record)
5576 unsigned long long time;
5582 if (isdigit(*(format + 1)))
5583 prec = atoi(format + 1);
5584 divstr = strchr(format, '.');
5585 if (divstr && isdigit(*(divstr + 1)))
5586 div = atoi(divstr + 1);
5596 if (p10 > 1 && p10 < time)
5597 trace_seq_printf(s, "%5llu.%0*llu", time / p10, prec, time % p10);
5599 trace_seq_printf(s, "%12llu", time);
5602 struct print_event_type {
5611 static void print_string(struct tep_handle *tep, struct trace_seq *s,
5612 struct tep_record *record, struct tep_event *event,
5613 const char *arg, struct print_event_type *type)
5618 if (strncmp(arg, TEP_PRINT_LATENCY, strlen(TEP_PRINT_LATENCY)) == 0) {
5619 data_latency_format(tep, s, type->format, record);
5620 } else if (strncmp(arg, TEP_PRINT_COMM, strlen(TEP_PRINT_COMM)) == 0) {
5621 pid = parse_common_pid(tep, record->data);
5622 comm = find_cmdline(tep, pid);
5623 trace_seq_printf(s, type->format, comm);
5624 } else if (strncmp(arg, TEP_PRINT_INFO_RAW, strlen(TEP_PRINT_INFO_RAW)) == 0) {
5625 print_event_info(s, type->format, true, event, record);
5626 } else if (strncmp(arg, TEP_PRINT_INFO, strlen(TEP_PRINT_INFO)) == 0) {
5627 print_event_info(s, type->format, false, event, record);
5628 } else if (strncmp(arg, TEP_PRINT_NAME, strlen(TEP_PRINT_NAME)) == 0) {
5629 trace_seq_printf(s, type->format, event->name);
5631 trace_seq_printf(s, "[UNKNOWN TEP TYPE %s]", arg);
5636 static void print_int(struct tep_handle *tep, struct trace_seq *s,
5637 struct tep_record *record, struct tep_event *event,
5638 int arg, struct print_event_type *type)
5644 param = record->cpu;
5647 param = parse_common_pid(tep, record->data);
5649 case TEP_PRINT_TIME:
5650 return print_event_time(tep, s, type->format, event, record);
5654 trace_seq_printf(s, type->format, param);
5657 static int tep_print_event_param_type(char *format,
5658 struct print_event_type *type)
5660 char *str = format + 1;
5663 type->type = EVENT_TYPE_UNKNOWN;
5672 type->type = EVENT_TYPE_INT;
5675 type->type = EVENT_TYPE_STRING;
5680 if (type->type != EVENT_TYPE_UNKNOWN)
5683 memset(type->format, 0, 32);
5684 memcpy(type->format, format, i < 32 ? i : 31);
5689 * tep_print_event - Write various event information
5690 * @tep: a handle to the trace event parser context
5691 * @s: the trace_seq to write to
5692 * @record: The record to get the event from
5693 * @format: a printf format string. Supported event fileds:
5694 * TEP_PRINT_PID, "%d" - event PID
5695 * TEP_PRINT_CPU, "%d" - event CPU
5696 * TEP_PRINT_COMM, "%s" - event command string
5697 * TEP_PRINT_NAME, "%s" - event name
5698 * TEP_PRINT_LATENCY, "%s" - event latency
5699 * TEP_PRINT_TIME, %d - event time stamp. A divisor and precision
5700 * can be specified as part of this format string:
5701 * "%precision.divisord". Example:
5702 * "%3.1000d" - divide the time by 1000 and print the first
5703 * 3 digits before the dot. Thus, the time stamp
5704 * "123456000" will be printed as "123.456"
5705 * TEP_PRINT_INFO, "%s" - event information. If any width is specified in
5706 * the format string, the event information will be printed
5708 * Writes the specified event information into @s.
5710 void tep_print_event(struct tep_handle *tep, struct trace_seq *s,
5711 struct tep_record *record, const char *fmt, ...)
5713 struct print_event_type type;
5714 char *format = strdup(fmt);
5715 char *current = format;
5719 struct tep_event *event;
5724 event = tep_find_event_by_record(tep, record);
5725 va_start(args, fmt);
5727 current = strchr(str, '%');
5729 trace_seq_puts(s, str);
5732 memset(&type, 0, sizeof(type));
5733 offset = tep_print_event_param_type(current, &type);
5735 trace_seq_puts(s, str);
5737 switch (type.type) {
5738 case EVENT_TYPE_STRING:
5739 print_string(tep, s, record, event,
5740 va_arg(args, char*), &type);
5742 case EVENT_TYPE_INT:
5743 print_int(tep, s, record, event,
5744 va_arg(args, int), &type);
5746 case EVENT_TYPE_UNKNOWN:
5748 trace_seq_printf(s, "[UNKNOWN TYPE]");
5758 static int events_id_cmp(const void *a, const void *b)
5760 struct tep_event * const * ea = a;
5761 struct tep_event * const * eb = b;
5763 if ((*ea)->id < (*eb)->id)
5766 if ((*ea)->id > (*eb)->id)
5772 static int events_name_cmp(const void *a, const void *b)
5774 struct tep_event * const * ea = a;
5775 struct tep_event * const * eb = b;
5778 res = strcmp((*ea)->name, (*eb)->name);
5782 res = strcmp((*ea)->system, (*eb)->system);
5786 return events_id_cmp(a, b);
5789 static int events_system_cmp(const void *a, const void *b)
5791 struct tep_event * const * ea = a;
5792 struct tep_event * const * eb = b;
5795 res = strcmp((*ea)->system, (*eb)->system);
5799 res = strcmp((*ea)->name, (*eb)->name);
5803 return events_id_cmp(a, b);
5806 static struct tep_event **list_events_copy(struct tep_handle *tep)
5808 struct tep_event **events;
5813 events = malloc(sizeof(*events) * (tep->nr_events + 1));
5817 memcpy(events, tep->events, sizeof(*events) * tep->nr_events);
5818 events[tep->nr_events] = NULL;
5822 static void list_events_sort(struct tep_event **events, int nr_events,
5823 enum tep_event_sort_type sort_type)
5825 int (*sort)(const void *a, const void *b);
5827 switch (sort_type) {
5828 case TEP_EVENT_SORT_ID:
5829 sort = events_id_cmp;
5831 case TEP_EVENT_SORT_NAME:
5832 sort = events_name_cmp;
5834 case TEP_EVENT_SORT_SYSTEM:
5835 sort = events_system_cmp;
5842 qsort(events, nr_events, sizeof(*events), sort);
5846 * tep_list_events - Get events, sorted by given criteria.
5847 * @tep: a handle to the tep context
5848 * @sort_type: desired sort order of the events in the array
5850 * Returns an array of pointers to all events, sorted by the given
5851 * @sort_type criteria. The last element of the array is NULL. The returned
5852 * memory must not be freed, it is managed by the library.
5853 * The function is not thread safe.
5855 struct tep_event **tep_list_events(struct tep_handle *tep,
5856 enum tep_event_sort_type sort_type)
5858 struct tep_event **events;
5863 events = tep->sort_events;
5864 if (events && tep->last_type == sort_type)
5868 events = list_events_copy(tep);
5872 tep->sort_events = events;
5874 /* the internal events are sorted by id */
5875 if (sort_type == TEP_EVENT_SORT_ID) {
5876 tep->last_type = sort_type;
5881 list_events_sort(events, tep->nr_events, sort_type);
5882 tep->last_type = sort_type;
5889 * tep_list_events_copy - Thread safe version of tep_list_events()
5890 * @tep: a handle to the tep context
5891 * @sort_type: desired sort order of the events in the array
5893 * Returns an array of pointers to all events, sorted by the given
5894 * @sort_type criteria. The last element of the array is NULL. The returned
5895 * array is newly allocated inside the function and must be freed by the caller
5897 struct tep_event **tep_list_events_copy(struct tep_handle *tep,
5898 enum tep_event_sort_type sort_type)
5900 struct tep_event **events;
5905 events = list_events_copy(tep);
5909 /* the internal events are sorted by id */
5910 if (sort_type == TEP_EVENT_SORT_ID)
5913 list_events_sort(events, tep->nr_events, sort_type);
5918 static struct tep_format_field **
5919 get_event_fields(const char *type, const char *name,
5920 int count, struct tep_format_field *list)
5922 struct tep_format_field **fields;
5923 struct tep_format_field *field;
5926 fields = malloc(sizeof(*fields) * (count + 1));
5930 for (field = list; field; field = field->next) {
5931 fields[i++] = field;
5932 if (i == count + 1) {
5933 do_warning("event %s has more %s fields than specified",
5941 do_warning("event %s has less %s fields than specified",
5950 * tep_event_common_fields - return a list of common fields for an event
5951 * @event: the event to return the common fields of.
5953 * Returns an allocated array of fields. The last item in the array is NULL.
5954 * The array must be freed with free().
5956 struct tep_format_field **tep_event_common_fields(struct tep_event *event)
5958 return get_event_fields("common", event->name,
5959 event->format.nr_common,
5960 event->format.common_fields);
5964 * tep_event_fields - return a list of event specific fields for an event
5965 * @event: the event to return the fields of.
5967 * Returns an allocated array of fields. The last item in the array is NULL.
5968 * The array must be freed with free().
5970 struct tep_format_field **tep_event_fields(struct tep_event *event)
5972 return get_event_fields("event", event->name,
5973 event->format.nr_fields,
5974 event->format.fields);
5977 static void print_fields(struct trace_seq *s, struct tep_print_flag_sym *field)
5979 trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
5981 trace_seq_puts(s, ", ");
5982 print_fields(s, field->next);
5987 static void print_args(struct tep_print_arg *args)
5989 int print_paren = 1;
5992 switch (args->type) {
5993 case TEP_PRINT_NULL:
5996 case TEP_PRINT_ATOM:
5997 printf("%s", args->atom.atom);
5999 case TEP_PRINT_FIELD:
6000 printf("REC->%s", args->field.name);
6002 case TEP_PRINT_FLAGS:
6003 printf("__print_flags(");
6004 print_args(args->flags.field);
6005 printf(", %s, ", args->flags.delim);
6007 print_fields(&s, args->flags.flags);
6008 trace_seq_do_printf(&s);
6009 trace_seq_destroy(&s);
6012 case TEP_PRINT_SYMBOL:
6013 printf("__print_symbolic(");
6014 print_args(args->symbol.field);
6017 print_fields(&s, args->symbol.symbols);
6018 trace_seq_do_printf(&s);
6019 trace_seq_destroy(&s);
6023 printf("__print_hex(");
6024 print_args(args->hex.field);
6026 print_args(args->hex.size);
6029 case TEP_PRINT_HEX_STR:
6030 printf("__print_hex_str(");
6031 print_args(args->hex.field);
6033 print_args(args->hex.size);
6036 case TEP_PRINT_INT_ARRAY:
6037 printf("__print_array(");
6038 print_args(args->int_array.field);
6040 print_args(args->int_array.count);
6042 print_args(args->int_array.el_size);
6045 case TEP_PRINT_STRING:
6046 case TEP_PRINT_BSTRING:
6047 printf("__get_str(%s)", args->string.string);
6049 case TEP_PRINT_BITMASK:
6050 printf("__get_bitmask(%s)", args->bitmask.bitmask);
6052 case TEP_PRINT_TYPE:
6053 printf("(%s)", args->typecast.type);
6054 print_args(args->typecast.item);
6057 if (strcmp(args->op.op, ":") == 0)
6061 print_args(args->op.left);
6062 printf(" %s ", args->op.op);
6063 print_args(args->op.right);
6068 /* we should warn... */
6073 print_args(args->next);
6077 static void parse_header_field(const char *field,
6078 int *offset, int *size, int mandatory)
6080 unsigned long long save_input_buf_ptr;
6081 unsigned long long save_input_buf_siz;
6085 save_input_buf_ptr = input_buf_ptr;
6086 save_input_buf_siz = input_buf_siz;
6088 if (read_expected(TEP_EVENT_ITEM, "field") < 0)
6090 if (read_expected(TEP_EVENT_OP, ":") < 0)
6094 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6099 * If this is not a mandatory field, then test it first.
6102 if (read_expected(TEP_EVENT_ITEM, field) < 0)
6105 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6107 if (strcmp(token, field) != 0)
6112 if (read_expected(TEP_EVENT_OP, ";") < 0)
6114 if (read_expected(TEP_EVENT_ITEM, "offset") < 0)
6116 if (read_expected(TEP_EVENT_OP, ":") < 0)
6118 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6120 *offset = atoi(token);
6122 if (read_expected(TEP_EVENT_OP, ";") < 0)
6124 if (read_expected(TEP_EVENT_ITEM, "size") < 0)
6126 if (read_expected(TEP_EVENT_OP, ":") < 0)
6128 if (read_expect_type(TEP_EVENT_ITEM, &token) < 0)
6130 *size = atoi(token);
6132 if (read_expected(TEP_EVENT_OP, ";") < 0)
6134 type = read_token(&token);
6135 if (type != TEP_EVENT_NEWLINE) {
6136 /* newer versions of the kernel have a "signed" type */
6137 if (type != TEP_EVENT_ITEM)
6140 if (strcmp(token, "signed") != 0)
6145 if (read_expected(TEP_EVENT_OP, ":") < 0)
6148 if (read_expect_type(TEP_EVENT_ITEM, &token))
6152 if (read_expected(TEP_EVENT_OP, ";") < 0)
6155 if (read_expect_type(TEP_EVENT_NEWLINE, &token))
6163 input_buf_ptr = save_input_buf_ptr;
6164 input_buf_siz = save_input_buf_siz;
6171 * tep_parse_header_page - parse the data stored in the header page
6172 * @tep: a handle to the trace event parser context
6173 * @buf: the buffer storing the header page format string
6174 * @size: the size of @buf
6175 * @long_size: the long size to use if there is no header
6177 * This parses the header page format for information on the
6178 * ring buffer used. The @buf should be copied from
6180 * /sys/kernel/debug/tracing/events/header_page
6182 int tep_parse_header_page(struct tep_handle *tep, char *buf, unsigned long size,
6189 * Old kernels did not have header page info.
6190 * Sorry but we just use what we find here in user space.
6192 tep->header_page_ts_size = sizeof(long long);
6193 tep->header_page_size_size = long_size;
6194 tep->header_page_data_offset = sizeof(long long) + long_size;
6195 tep->old_format = 1;
6198 init_input_buf(buf, size);
6200 parse_header_field("timestamp", &tep->header_page_ts_offset,
6201 &tep->header_page_ts_size, 1);
6202 parse_header_field("commit", &tep->header_page_size_offset,
6203 &tep->header_page_size_size, 1);
6204 parse_header_field("overwrite", &tep->header_page_overwrite,
6206 parse_header_field("data", &tep->header_page_data_offset,
6207 &tep->header_page_data_size, 1);
6212 static int event_matches(struct tep_event *event,
6213 int id, const char *sys_name,
6214 const char *event_name)
6216 if (id >= 0 && id != event->id)
6219 if (event_name && (strcmp(event_name, event->name) != 0))
6222 if (sys_name && (strcmp(sys_name, event->system) != 0))
6228 static void free_handler(struct event_handler *handle)
6230 free((void *)handle->sys_name);
6231 free((void *)handle->event_name);
6235 static int find_event_handle(struct tep_handle *tep, struct tep_event *event)
6237 struct event_handler *handle, **next;
6239 for (next = &tep->handlers; *next;
6240 next = &(*next)->next) {
6242 if (event_matches(event, handle->id,
6244 handle->event_name))
6251 pr_stat("overriding event (%d) %s:%s with new print handler",
6252 event->id, event->system, event->name);
6254 event->handler = handle->func;
6255 event->context = handle->context;
6257 *next = handle->next;
6258 free_handler(handle);
6264 * __tep_parse_format - parse the event format
6265 * @buf: the buffer storing the event format string
6266 * @size: the size of @buf
6267 * @sys: the system the event belongs to
6269 * This parses the event format and creates an event structure
6270 * to quickly parse raw data for a given event.
6272 * These files currently come from:
6274 * /sys/kernel/debug/tracing/events/.../.../format
6276 enum tep_errno __tep_parse_format(struct tep_event **eventp,
6277 struct tep_handle *tep, const char *buf,
6278 unsigned long size, const char *sys)
6280 struct tep_event *event;
6283 init_input_buf(buf, size);
6285 *eventp = event = alloc_event();
6287 return TEP_ERRNO__MEM_ALLOC_FAILED;
6289 event->name = event_read_name();
6292 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6293 goto event_alloc_failed;
6296 if (strcmp(sys, "ftrace") == 0) {
6297 event->flags |= TEP_EVENT_FL_ISFTRACE;
6299 if (strcmp(event->name, "bprint") == 0)
6300 event->flags |= TEP_EVENT_FL_ISBPRINT;
6303 event->id = event_read_id();
6304 if (event->id < 0) {
6305 ret = TEP_ERRNO__READ_ID_FAILED;
6307 * This isn't an allocation error actually.
6308 * But as the ID is critical, just bail out.
6310 goto event_alloc_failed;
6313 event->system = strdup(sys);
6314 if (!event->system) {
6315 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6316 goto event_alloc_failed;
6319 /* Add tep to event so that it can be referenced */
6322 ret = event_read_format(event);
6324 ret = TEP_ERRNO__READ_FORMAT_FAILED;
6325 goto event_parse_failed;
6329 * If the event has an override, don't print warnings if the event
6330 * print format fails to parse.
6332 if (tep && find_event_handle(tep, event))
6335 ret = event_read_print(event);
6339 ret = TEP_ERRNO__READ_PRINT_FAILED;
6340 goto event_parse_failed;
6343 if (!ret && (event->flags & TEP_EVENT_FL_ISFTRACE)) {
6344 struct tep_format_field *field;
6345 struct tep_print_arg *arg, **list;
6347 /* old ftrace had no args */
6348 list = &event->print_fmt.args;
6349 for (field = event->format.fields; field; field = field->next) {
6352 event->flags |= TEP_EVENT_FL_FAILED;
6353 return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
6355 arg->type = TEP_PRINT_FIELD;
6356 arg->field.name = strdup(field->name);
6357 if (!arg->field.name) {
6358 event->flags |= TEP_EVENT_FL_FAILED;
6360 return TEP_ERRNO__OLD_FTRACE_ARG_FAILED;
6362 arg->field.field = field;
6372 event->flags |= TEP_EVENT_FL_FAILED;
6376 free(event->system);
6383 static enum tep_errno
6384 __parse_event(struct tep_handle *tep,
6385 struct tep_event **eventp,
6386 const char *buf, unsigned long size,
6389 int ret = __tep_parse_format(eventp, tep, buf, size, sys);
6390 struct tep_event *event = *eventp;
6395 if (tep && add_event(tep, event)) {
6396 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6397 goto event_add_failed;
6400 #define PRINT_ARGS 0
6401 if (PRINT_ARGS && event->print_fmt.args)
6402 print_args(event->print_fmt.args);
6407 tep_free_event(event);
6412 * tep_parse_format - parse the event format
6413 * @tep: a handle to the trace event parser context
6414 * @eventp: returned format
6415 * @buf: the buffer storing the event format string
6416 * @size: the size of @buf
6417 * @sys: the system the event belongs to
6419 * This parses the event format and creates an event structure
6420 * to quickly parse raw data for a given event.
6422 * These files currently come from:
6424 * /sys/kernel/debug/tracing/events/.../.../format
6426 enum tep_errno tep_parse_format(struct tep_handle *tep,
6427 struct tep_event **eventp,
6429 unsigned long size, const char *sys)
6431 return __parse_event(tep, eventp, buf, size, sys);
6435 * tep_parse_event - parse the event format
6436 * @tep: a handle to the trace event parser context
6437 * @buf: the buffer storing the event format string
6438 * @size: the size of @buf
6439 * @sys: the system the event belongs to
6441 * This parses the event format and creates an event structure
6442 * to quickly parse raw data for a given event.
6444 * These files currently come from:
6446 * /sys/kernel/debug/tracing/events/.../.../format
6448 enum tep_errno tep_parse_event(struct tep_handle *tep, const char *buf,
6449 unsigned long size, const char *sys)
6451 struct tep_event *event = NULL;
6452 return __parse_event(tep, &event, buf, size, sys);
6455 int get_field_val(struct trace_seq *s, struct tep_format_field *field,
6456 const char *name, struct tep_record *record,
6457 unsigned long long *val, int err)
6461 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6465 if (tep_read_number_field(field, record->data, val)) {
6467 trace_seq_printf(s, " %s=INVALID", name);
6475 * tep_get_field_raw - return the raw pointer into the data field
6476 * @s: The seq to print to on error
6477 * @event: the event that the field is for
6478 * @name: The name of the field
6479 * @record: The record with the field name.
6480 * @len: place to store the field length.
6481 * @err: print default error if failed.
6483 * Returns a pointer into record->data of the field and places
6484 * the length of the field in @len.
6486 * On failure, it returns NULL.
6488 void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
6489 const char *name, struct tep_record *record,
6492 struct tep_format_field *field;
6493 void *data = record->data;
6500 field = tep_find_field(event, name);
6504 trace_seq_printf(s, "<CANT FIND FIELD %s>", name);
6508 /* Allow @len to be NULL */
6512 offset = field->offset;
6513 if (field->flags & TEP_FIELD_IS_DYNAMIC) {
6514 offset = tep_read_number(event->tep,
6515 data + offset, field->size);
6516 *len = offset >> 16;
6521 return data + offset;
6525 * tep_get_field_val - find a field and return its value
6526 * @s: The seq to print to on error
6527 * @event: the event that the field is for
6528 * @name: The name of the field
6529 * @record: The record with the field name.
6530 * @val: place to store the value of the field.
6531 * @err: print default error if failed.
6533 * Returns 0 on success -1 on field not found.
6535 int tep_get_field_val(struct trace_seq *s, struct tep_event *event,
6536 const char *name, struct tep_record *record,
6537 unsigned long long *val, int err)
6539 struct tep_format_field *field;
6544 field = tep_find_field(event, name);
6546 return get_field_val(s, field, name, record, val, err);
6550 * tep_get_common_field_val - find a common field and return its value
6551 * @s: The seq to print to on error
6552 * @event: the event that the field is for
6553 * @name: The name of the field
6554 * @record: The record with the field name.
6555 * @val: place to store the value of the field.
6556 * @err: print default error if failed.
6558 * Returns 0 on success -1 on field not found.
6560 int tep_get_common_field_val(struct trace_seq *s, struct tep_event *event,
6561 const char *name, struct tep_record *record,
6562 unsigned long long *val, int err)
6564 struct tep_format_field *field;
6569 field = tep_find_common_field(event, name);
6571 return get_field_val(s, field, name, record, val, err);
6575 * tep_get_any_field_val - find a any field and return its value
6576 * @s: The seq to print to on error
6577 * @event: the event that the field is for
6578 * @name: The name of the field
6579 * @record: The record with the field name.
6580 * @val: place to store the value of the field.
6581 * @err: print default error if failed.
6583 * Returns 0 on success -1 on field not found.
6585 int tep_get_any_field_val(struct trace_seq *s, struct tep_event *event,
6586 const char *name, struct tep_record *record,
6587 unsigned long long *val, int err)
6589 struct tep_format_field *field;
6594 field = tep_find_any_field(event, name);
6596 return get_field_val(s, field, name, record, val, err);
6600 * tep_print_num_field - print a field and a format
6601 * @s: The seq to print to
6602 * @fmt: The printf format to print the field with.
6603 * @event: the event that the field is for
6604 * @name: The name of the field
6605 * @record: The record with the field name.
6606 * @err: print default error if failed.
6608 * Returns positive value on success, negative in case of an error,
6609 * or 0 if buffer is full.
6611 int tep_print_num_field(struct trace_seq *s, const char *fmt,
6612 struct tep_event *event, const char *name,
6613 struct tep_record *record, int err)
6615 struct tep_format_field *field = tep_find_field(event, name);
6616 unsigned long long val;
6621 if (tep_read_number_field(field, record->data, &val))
6624 return trace_seq_printf(s, fmt, val);
6628 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6633 * tep_print_func_field - print a field and a format for function pointers
6634 * @s: The seq to print to
6635 * @fmt: The printf format to print the field with.
6636 * @event: the event that the field is for
6637 * @name: The name of the field
6638 * @record: The record with the field name.
6639 * @err: print default error if failed.
6641 * Returns positive value on success, negative in case of an error,
6642 * or 0 if buffer is full.
6644 int tep_print_func_field(struct trace_seq *s, const char *fmt,
6645 struct tep_event *event, const char *name,
6646 struct tep_record *record, int err)
6648 struct tep_format_field *field = tep_find_field(event, name);
6649 struct tep_handle *tep = event->tep;
6650 unsigned long long val;
6651 struct func_map *func;
6657 if (tep_read_number_field(field, record->data, &val))
6660 func = find_func(tep, val);
6663 snprintf(tmp, 128, "%s/0x%llx", func->func, func->addr - val);
6665 sprintf(tmp, "0x%08llx", val);
6667 return trace_seq_printf(s, fmt, tmp);
6671 trace_seq_printf(s, "CAN'T FIND FIELD \"%s\"", name);
6675 static void free_func_handle(struct tep_function_handler *func)
6677 struct func_params *params;
6681 while (func->params) {
6682 params = func->params;
6683 func->params = params->next;
6691 * tep_register_print_function - register a helper function
6692 * @tep: a handle to the trace event parser context
6693 * @func: the function to process the helper function
6694 * @ret_type: the return type of the helper function
6695 * @name: the name of the helper function
6696 * @parameters: A list of enum tep_func_arg_type
6698 * Some events may have helper functions in the print format arguments.
6699 * This allows a plugin to dynamically create a way to process one
6700 * of these functions.
6702 * The @parameters is a variable list of tep_func_arg_type enums that
6703 * must end with TEP_FUNC_ARG_VOID.
6705 int tep_register_print_function(struct tep_handle *tep,
6706 tep_func_handler func,
6707 enum tep_func_arg_type ret_type,
6710 struct tep_function_handler *func_handle;
6711 struct func_params **next_param;
6712 struct func_params *param;
6713 enum tep_func_arg_type type;
6717 func_handle = find_func_handler(tep, name);
6720 * This is most like caused by the users own
6721 * plugins updating the function. This overrides the
6724 pr_stat("override of function helper '%s'", name);
6725 remove_func_handler(tep, name);
6728 func_handle = calloc(1, sizeof(*func_handle));
6730 do_warning("Failed to allocate function handler");
6731 return TEP_ERRNO__MEM_ALLOC_FAILED;
6734 func_handle->ret_type = ret_type;
6735 func_handle->name = strdup(name);
6736 func_handle->func = func;
6737 if (!func_handle->name) {
6738 do_warning("Failed to allocate function name");
6740 return TEP_ERRNO__MEM_ALLOC_FAILED;
6743 next_param = &(func_handle->params);
6746 type = va_arg(ap, enum tep_func_arg_type);
6747 if (type == TEP_FUNC_ARG_VOID)
6750 if (type >= TEP_FUNC_ARG_MAX_TYPES) {
6751 do_warning("Invalid argument type %d", type);
6752 ret = TEP_ERRNO__INVALID_ARG_TYPE;
6756 param = malloc(sizeof(*param));
6758 do_warning("Failed to allocate function param");
6759 ret = TEP_ERRNO__MEM_ALLOC_FAILED;
6765 *next_param = param;
6766 next_param = &(param->next);
6768 func_handle->nr_args++;
6772 func_handle->next = tep->func_handlers;
6773 tep->func_handlers = func_handle;
6778 free_func_handle(func_handle);
6783 * tep_unregister_print_function - unregister a helper function
6784 * @tep: a handle to the trace event parser context
6785 * @func: the function to process the helper function
6786 * @name: the name of the helper function
6788 * This function removes existing print handler for function @name.
6790 * Returns 0 if the handler was removed successully, -1 otherwise.
6792 int tep_unregister_print_function(struct tep_handle *tep,
6793 tep_func_handler func, char *name)
6795 struct tep_function_handler *func_handle;
6797 func_handle = find_func_handler(tep, name);
6798 if (func_handle && func_handle->func == func) {
6799 remove_func_handler(tep, name);
6805 static struct tep_event *search_event(struct tep_handle *tep, int id,
6806 const char *sys_name,
6807 const char *event_name)
6809 struct tep_event *event;
6813 event = tep_find_event(tep, id);
6816 if (event_name && (strcmp(event_name, event->name) != 0))
6818 if (sys_name && (strcmp(sys_name, event->system) != 0))
6821 event = tep_find_event_by_name(tep, sys_name, event_name);
6829 * tep_register_event_handler - register a way to parse an event
6830 * @tep: a handle to the trace event parser context
6831 * @id: the id of the event to register
6832 * @sys_name: the system name the event belongs to
6833 * @event_name: the name of the event
6834 * @func: the function to call to parse the event information
6835 * @context: the data to be passed to @func
6837 * This function allows a developer to override the parsing of
6838 * a given event. If for some reason the default print format
6839 * is not sufficient, this function will register a function
6840 * for an event to be used to parse the data instead.
6842 * If @id is >= 0, then it is used to find the event.
6843 * else @sys_name and @event_name are used.
6846 * TEP_REGISTER_SUCCESS_OVERWRITE if an existing handler is overwritten
6847 * TEP_REGISTER_SUCCESS if a new handler is registered successfully
6848 * negative TEP_ERRNO_... in case of an error
6851 int tep_register_event_handler(struct tep_handle *tep, int id,
6852 const char *sys_name, const char *event_name,
6853 tep_event_handler_func func, void *context)
6855 struct tep_event *event;
6856 struct event_handler *handle;
6858 event = search_event(tep, id, sys_name, event_name);
6862 pr_stat("overriding event (%d) %s:%s with new print handler",
6863 event->id, event->system, event->name);
6865 event->handler = func;
6866 event->context = context;
6867 return TEP_REGISTER_SUCCESS_OVERWRITE;
6870 /* Save for later use. */
6871 handle = calloc(1, sizeof(*handle));
6873 do_warning("Failed to allocate event handler");
6874 return TEP_ERRNO__MEM_ALLOC_FAILED;
6879 handle->event_name = strdup(event_name);
6881 handle->sys_name = strdup(sys_name);
6883 if ((event_name && !handle->event_name) ||
6884 (sys_name && !handle->sys_name)) {
6885 do_warning("Failed to allocate event/sys name");
6886 free((void *)handle->event_name);
6887 free((void *)handle->sys_name);
6889 return TEP_ERRNO__MEM_ALLOC_FAILED;
6892 handle->func = func;
6893 handle->next = tep->handlers;
6894 tep->handlers = handle;
6895 handle->context = context;
6897 return TEP_REGISTER_SUCCESS;
6900 static int handle_matches(struct event_handler *handler, int id,
6901 const char *sys_name, const char *event_name,
6902 tep_event_handler_func func, void *context)
6904 if (id >= 0 && id != handler->id)
6907 if (event_name && (strcmp(event_name, handler->event_name) != 0))
6910 if (sys_name && (strcmp(sys_name, handler->sys_name) != 0))
6913 if (func != handler->func || context != handler->context)
6920 * tep_unregister_event_handler - unregister an existing event handler
6921 * @tep: a handle to the trace event parser context
6922 * @id: the id of the event to unregister
6923 * @sys_name: the system name the handler belongs to
6924 * @event_name: the name of the event handler
6925 * @func: the function to call to parse the event information
6926 * @context: the data to be passed to @func
6928 * This function removes existing event handler (parser).
6930 * If @id is >= 0, then it is used to find the event.
6931 * else @sys_name and @event_name are used.
6933 * Returns 0 if handler was removed successfully, -1 if event was not found.
6935 int tep_unregister_event_handler(struct tep_handle *tep, int id,
6936 const char *sys_name, const char *event_name,
6937 tep_event_handler_func func, void *context)
6939 struct tep_event *event;
6940 struct event_handler *handle;
6941 struct event_handler **next;
6943 event = search_event(tep, id, sys_name, event_name);
6947 if (event->handler == func && event->context == context) {
6948 pr_stat("removing override handler for event (%d) %s:%s. Going back to default handler.",
6949 event->id, event->system, event->name);
6951 event->handler = NULL;
6952 event->context = NULL;
6957 for (next = &tep->handlers; *next; next = &(*next)->next) {
6959 if (handle_matches(handle, id, sys_name, event_name,
6967 *next = handle->next;
6968 free_handler(handle);
6974 * tep_alloc - create a tep handle
6976 struct tep_handle *tep_alloc(void)
6978 struct tep_handle *tep = calloc(1, sizeof(*tep));
6982 tep->host_bigendian = tep_is_bigendian();
6988 void tep_ref(struct tep_handle *tep)
6993 int tep_get_ref(struct tep_handle *tep)
6996 return tep->ref_count;
7000 void tep_free_format_field(struct tep_format_field *field)
7003 if (field->alias != field->name)
7009 static void free_format_fields(struct tep_format_field *field)
7011 struct tep_format_field *next;
7015 tep_free_format_field(field);
7020 static void free_formats(struct tep_format *format)
7022 free_format_fields(format->common_fields);
7023 free_format_fields(format->fields);
7026 void tep_free_event(struct tep_event *event)
7029 free(event->system);
7031 free_formats(&event->format);
7033 free(event->print_fmt.format);
7034 free_args(event->print_fmt.args);
7040 * tep_free - free a tep handle
7041 * @tep: the tep handle to free
7043 void tep_free(struct tep_handle *tep)
7045 struct cmdline_list *cmdlist, *cmdnext;
7046 struct func_list *funclist, *funcnext;
7047 struct printk_list *printklist, *printknext;
7048 struct tep_function_handler *func_handler;
7049 struct event_handler *handle;
7055 cmdlist = tep->cmdlist;
7056 funclist = tep->funclist;
7057 printklist = tep->printklist;
7063 if (tep->cmdlines) {
7064 for (i = 0; i < tep->cmdline_count; i++)
7065 free(tep->cmdlines[i].comm);
7066 free(tep->cmdlines);
7070 cmdnext = cmdlist->next;
7071 free(cmdlist->comm);
7076 if (tep->func_map) {
7077 for (i = 0; i < (int)tep->func_count; i++) {
7078 free(tep->func_map[i].func);
7079 free(tep->func_map[i].mod);
7081 free(tep->func_map);
7085 funcnext = funclist->next;
7086 free(funclist->func);
7087 free(funclist->mod);
7089 funclist = funcnext;
7092 while (tep->func_handlers) {
7093 func_handler = tep->func_handlers;
7094 tep->func_handlers = func_handler->next;
7095 free_func_handle(func_handler);
7098 if (tep->printk_map) {
7099 for (i = 0; i < (int)tep->printk_count; i++)
7100 free(tep->printk_map[i].printk);
7101 free(tep->printk_map);
7104 while (printklist) {
7105 printknext = printklist->next;
7106 free(printklist->printk);
7108 printklist = printknext;
7111 for (i = 0; i < tep->nr_events; i++)
7112 tep_free_event(tep->events[i]);
7114 while (tep->handlers) {
7115 handle = tep->handlers;
7116 tep->handlers = handle->next;
7117 free_handler(handle);
7121 free(tep->sort_events);
7122 free(tep->func_resolver);
7127 void tep_unref(struct tep_handle *tep)