perf: Fix parsing of __print_flags() in TP_printk()
[pandora-kernel.git] / tools / perf / util / trace-event-parse.c
1 /*
2  * Copyright (C) 2009, Steven Rostedt <srostedt@redhat.com>
3  *
4  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; version 2 of the License (not later!)
9  *
10  * This program is distributed in the hope that it will be useful,
11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13  * GNU General Public License for more details.
14  *
15  * You should have received a copy of the GNU General Public License
16  * along with this program; if not, write to the Free Software
17  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
18  *
19  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
20  *
21  *  The parts for function graph printing was taken and modified from the
22  *  Linux Kernel that were written by Frederic Weisbecker.
23  */
24 #define _GNU_SOURCE
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <ctype.h>
29 #include <errno.h>
30
31 #undef _GNU_SOURCE
32 #include "../perf.h"
33 #include "util.h"
34 #include "trace-event.h"
35
36 int header_page_ts_offset;
37 int header_page_ts_size;
38 int header_page_size_offset;
39 int header_page_size_size;
40 int header_page_overwrite_offset;
41 int header_page_overwrite_size;
42 int header_page_data_offset;
43 int header_page_data_size;
44
45 bool latency_format;
46
47 static char *input_buf;
48 static unsigned long long input_buf_ptr;
49 static unsigned long long input_buf_siz;
50
51 static int cpus;
52 static int long_size;
53 static int is_flag_field;
54 static int is_symbolic_field;
55
56 static struct format_field *
57 find_any_field(struct event *event, const char *name);
58
59 static void init_input_buf(char *buf, unsigned long long size)
60 {
61         input_buf = buf;
62         input_buf_siz = size;
63         input_buf_ptr = 0;
64 }
65
66 struct cmdline {
67         char *comm;
68         int pid;
69 };
70
71 static struct cmdline *cmdlines;
72 static int cmdline_count;
73
74 static int cmdline_cmp(const void *a, const void *b)
75 {
76         const struct cmdline *ca = a;
77         const struct cmdline *cb = b;
78
79         if (ca->pid < cb->pid)
80                 return -1;
81         if (ca->pid > cb->pid)
82                 return 1;
83
84         return 0;
85 }
86
87 void parse_cmdlines(char *file, int size __unused)
88 {
89         struct cmdline_list {
90                 struct cmdline_list     *next;
91                 char                    *comm;
92                 int                     pid;
93         } *list = NULL, *item;
94         char *line;
95         char *next = NULL;
96         int i;
97
98         line = strtok_r(file, "\n", &next);
99         while (line) {
100                 item = malloc_or_die(sizeof(*item));
101                 sscanf(line, "%d %as", &item->pid,
102                        (float *)(void *)&item->comm); /* workaround gcc warning */
103                 item->next = list;
104                 list = item;
105                 line = strtok_r(NULL, "\n", &next);
106                 cmdline_count++;
107         }
108
109         cmdlines = malloc_or_die(sizeof(*cmdlines) * cmdline_count);
110
111         i = 0;
112         while (list) {
113                 cmdlines[i].pid = list->pid;
114                 cmdlines[i].comm = list->comm;
115                 i++;
116                 item = list;
117                 list = list->next;
118                 free(item);
119         }
120
121         qsort(cmdlines, cmdline_count, sizeof(*cmdlines), cmdline_cmp);
122 }
123
124 static struct func_map {
125         unsigned long long              addr;
126         char                            *func;
127         char                            *mod;
128 } *func_list;
129 static unsigned int func_count;
130
131 static int func_cmp(const void *a, const void *b)
132 {
133         const struct func_map *fa = a;
134         const struct func_map *fb = b;
135
136         if (fa->addr < fb->addr)
137                 return -1;
138         if (fa->addr > fb->addr)
139                 return 1;
140
141         return 0;
142 }
143
144 void parse_proc_kallsyms(char *file, unsigned int size __unused)
145 {
146         struct func_list {
147                 struct func_list        *next;
148                 unsigned long long      addr;
149                 char                    *func;
150                 char                    *mod;
151         } *list = NULL, *item;
152         char *line;
153         char *next = NULL;
154         char *addr_str;
155         char ch;
156         int ret __used;
157         int i;
158
159         line = strtok_r(file, "\n", &next);
160         while (line) {
161                 item = malloc_or_die(sizeof(*item));
162                 item->mod = NULL;
163                 ret = sscanf(line, "%as %c %as\t[%as",
164                              (float *)(void *)&addr_str, /* workaround gcc warning */
165                              &ch,
166                              (float *)(void *)&item->func,
167                              (float *)(void *)&item->mod);
168                 item->addr = strtoull(addr_str, NULL, 16);
169                 free(addr_str);
170
171                 /* truncate the extra ']' */
172                 if (item->mod)
173                         item->mod[strlen(item->mod) - 1] = 0;
174
175
176                 item->next = list;
177                 list = item;
178                 line = strtok_r(NULL, "\n", &next);
179                 func_count++;
180         }
181
182         func_list = malloc_or_die(sizeof(*func_list) * (func_count + 1));
183
184         i = 0;
185         while (list) {
186                 func_list[i].func = list->func;
187                 func_list[i].addr = list->addr;
188                 func_list[i].mod = list->mod;
189                 i++;
190                 item = list;
191                 list = list->next;
192                 free(item);
193         }
194
195         qsort(func_list, func_count, sizeof(*func_list), func_cmp);
196
197         /*
198          * Add a special record at the end.
199          */
200         func_list[func_count].func = NULL;
201         func_list[func_count].addr = 0;
202         func_list[func_count].mod = NULL;
203 }
204
205 /*
206  * We are searching for a record in between, not an exact
207  * match.
208  */
209 static int func_bcmp(const void *a, const void *b)
210 {
211         const struct func_map *fa = a;
212         const struct func_map *fb = b;
213
214         if ((fa->addr == fb->addr) ||
215
216             (fa->addr > fb->addr &&
217              fa->addr < (fb+1)->addr))
218                 return 0;
219
220         if (fa->addr < fb->addr)
221                 return -1;
222
223         return 1;
224 }
225
226 static struct func_map *find_func(unsigned long long addr)
227 {
228         struct func_map *func;
229         struct func_map key;
230
231         key.addr = addr;
232
233         func = bsearch(&key, func_list, func_count, sizeof(*func_list),
234                        func_bcmp);
235
236         return func;
237 }
238
239 void print_funcs(void)
240 {
241         int i;
242
243         for (i = 0; i < (int)func_count; i++) {
244                 printf("%016llx %s",
245                        func_list[i].addr,
246                        func_list[i].func);
247                 if (func_list[i].mod)
248                         printf(" [%s]\n", func_list[i].mod);
249                 else
250                         printf("\n");
251         }
252 }
253
254 static struct printk_map {
255         unsigned long long              addr;
256         char                            *printk;
257 } *printk_list;
258 static unsigned int printk_count;
259
260 static int printk_cmp(const void *a, const void *b)
261 {
262         const struct func_map *fa = a;
263         const struct func_map *fb = b;
264
265         if (fa->addr < fb->addr)
266                 return -1;
267         if (fa->addr > fb->addr)
268                 return 1;
269
270         return 0;
271 }
272
273 static struct printk_map *find_printk(unsigned long long addr)
274 {
275         struct printk_map *printk;
276         struct printk_map key;
277
278         key.addr = addr;
279
280         printk = bsearch(&key, printk_list, printk_count, sizeof(*printk_list),
281                          printk_cmp);
282
283         return printk;
284 }
285
286 void parse_ftrace_printk(char *file, unsigned int size __unused)
287 {
288         struct printk_list {
289                 struct printk_list      *next;
290                 unsigned long long      addr;
291                 char                    *printk;
292         } *list = NULL, *item;
293         char *line;
294         char *next = NULL;
295         char *addr_str;
296         int i;
297
298         line = strtok_r(file, "\n", &next);
299         while (line) {
300                 addr_str = strsep(&line, ":");
301                 if (!line) {
302                         warning("error parsing print strings");
303                         break;
304                 }
305                 item = malloc_or_die(sizeof(*item));
306                 item->addr = strtoull(addr_str, NULL, 16);
307                 /* fmt still has a space, skip it */
308                 item->printk = strdup(line+1);
309                 item->next = list;
310                 list = item;
311                 line = strtok_r(NULL, "\n", &next);
312                 printk_count++;
313         }
314
315         printk_list = malloc_or_die(sizeof(*printk_list) * printk_count + 1);
316
317         i = 0;
318         while (list) {
319                 printk_list[i].printk = list->printk;
320                 printk_list[i].addr = list->addr;
321                 i++;
322                 item = list;
323                 list = list->next;
324                 free(item);
325         }
326
327         qsort(printk_list, printk_count, sizeof(*printk_list), printk_cmp);
328 }
329
330 void print_printk(void)
331 {
332         int i;
333
334         for (i = 0; i < (int)printk_count; i++) {
335                 printf("%016llx %s\n",
336                        printk_list[i].addr,
337                        printk_list[i].printk);
338         }
339 }
340
341 static struct event *alloc_event(void)
342 {
343         struct event *event;
344
345         event = malloc_or_die(sizeof(*event));
346         memset(event, 0, sizeof(*event));
347
348         return event;
349 }
350
351 enum event_type {
352         EVENT_ERROR,
353         EVENT_NONE,
354         EVENT_SPACE,
355         EVENT_NEWLINE,
356         EVENT_OP,
357         EVENT_DELIM,
358         EVENT_ITEM,
359         EVENT_DQUOTE,
360         EVENT_SQUOTE,
361 };
362
363 static struct event *event_list;
364
365 static void add_event(struct event *event)
366 {
367         event->next = event_list;
368         event_list = event;
369 }
370
371 static int event_item_type(enum event_type type)
372 {
373         switch (type) {
374         case EVENT_ITEM ... EVENT_SQUOTE:
375                 return 1;
376         case EVENT_ERROR ... EVENT_DELIM:
377         default:
378                 return 0;
379         }
380 }
381
382 static void free_arg(struct print_arg *arg)
383 {
384         if (!arg)
385                 return;
386
387         switch (arg->type) {
388         case PRINT_ATOM:
389                 if (arg->atom.atom)
390                         free(arg->atom.atom);
391                 break;
392         case PRINT_NULL:
393         case PRINT_FIELD ... PRINT_OP:
394         default:
395                 /* todo */
396                 break;
397         }
398
399         free(arg);
400 }
401
402 static enum event_type get_type(int ch)
403 {
404         if (ch == '\n')
405                 return EVENT_NEWLINE;
406         if (isspace(ch))
407                 return EVENT_SPACE;
408         if (isalnum(ch) || ch == '_')
409                 return EVENT_ITEM;
410         if (ch == '\'')
411                 return EVENT_SQUOTE;
412         if (ch == '"')
413                 return EVENT_DQUOTE;
414         if (!isprint(ch))
415                 return EVENT_NONE;
416         if (ch == '(' || ch == ')' || ch == ',')
417                 return EVENT_DELIM;
418
419         return EVENT_OP;
420 }
421
422 static int __read_char(void)
423 {
424         if (input_buf_ptr >= input_buf_siz)
425                 return -1;
426
427         return input_buf[input_buf_ptr++];
428 }
429
430 static int __peek_char(void)
431 {
432         if (input_buf_ptr >= input_buf_siz)
433                 return -1;
434
435         return input_buf[input_buf_ptr];
436 }
437
438 static enum event_type __read_token(char **tok)
439 {
440         char buf[BUFSIZ];
441         int ch, last_ch, quote_ch, next_ch;
442         int i = 0;
443         int tok_size = 0;
444         enum event_type type;
445
446         *tok = NULL;
447
448
449         ch = __read_char();
450         if (ch < 0)
451                 return EVENT_NONE;
452
453         type = get_type(ch);
454         if (type == EVENT_NONE)
455                 return type;
456
457         buf[i++] = ch;
458
459         switch (type) {
460         case EVENT_NEWLINE:
461         case EVENT_DELIM:
462                 *tok = malloc_or_die(2);
463                 (*tok)[0] = ch;
464                 (*tok)[1] = 0;
465                 return type;
466
467         case EVENT_OP:
468                 switch (ch) {
469                 case '-':
470                         next_ch = __peek_char();
471                         if (next_ch == '>') {
472                                 buf[i++] = __read_char();
473                                 break;
474                         }
475                         /* fall through */
476                 case '+':
477                 case '|':
478                 case '&':
479                 case '>':
480                 case '<':
481                         last_ch = ch;
482                         ch = __peek_char();
483                         if (ch != last_ch)
484                                 goto test_equal;
485                         buf[i++] = __read_char();
486                         switch (last_ch) {
487                         case '>':
488                         case '<':
489                                 goto test_equal;
490                         default:
491                                 break;
492                         }
493                         break;
494                 case '!':
495                 case '=':
496                         goto test_equal;
497                 default: /* what should we do instead? */
498                         break;
499                 }
500                 buf[i] = 0;
501                 *tok = strdup(buf);
502                 return type;
503
504  test_equal:
505                 ch = __peek_char();
506                 if (ch == '=')
507                         buf[i++] = __read_char();
508                 break;
509
510         case EVENT_DQUOTE:
511         case EVENT_SQUOTE:
512                 /* don't keep quotes */
513                 i--;
514                 quote_ch = ch;
515                 last_ch = 0;
516                 do {
517                         if (i == (BUFSIZ - 1)) {
518                                 buf[i] = 0;
519                                 if (*tok) {
520                                         *tok = realloc(*tok, tok_size + BUFSIZ);
521                                         if (!*tok)
522                                                 return EVENT_NONE;
523                                         strcat(*tok, buf);
524                                 } else
525                                         *tok = strdup(buf);
526
527                                 if (!*tok)
528                                         return EVENT_NONE;
529                                 tok_size += BUFSIZ;
530                                 i = 0;
531                         }
532                         last_ch = ch;
533                         ch = __read_char();
534                         buf[i++] = ch;
535                         /* the '\' '\' will cancel itself */
536                         if (ch == '\\' && last_ch == '\\')
537                                 last_ch = 0;
538                 } while (ch != quote_ch || last_ch == '\\');
539                 /* remove the last quote */
540                 i--;
541                 goto out;
542
543         case EVENT_ERROR ... EVENT_SPACE:
544         case EVENT_ITEM:
545         default:
546                 break;
547         }
548
549         while (get_type(__peek_char()) == type) {
550                 if (i == (BUFSIZ - 1)) {
551                         buf[i] = 0;
552                         if (*tok) {
553                                 *tok = realloc(*tok, tok_size + BUFSIZ);
554                                 if (!*tok)
555                                         return EVENT_NONE;
556                                 strcat(*tok, buf);
557                         } else
558                                 *tok = strdup(buf);
559
560                         if (!*tok)
561                                 return EVENT_NONE;
562                         tok_size += BUFSIZ;
563                         i = 0;
564                 }
565                 ch = __read_char();
566                 buf[i++] = ch;
567         }
568
569  out:
570         buf[i] = 0;
571         if (*tok) {
572                 *tok = realloc(*tok, tok_size + i);
573                 if (!*tok)
574                         return EVENT_NONE;
575                 strcat(*tok, buf);
576         } else
577                 *tok = strdup(buf);
578         if (!*tok)
579                 return EVENT_NONE;
580
581         return type;
582 }
583
584 static void free_token(char *tok)
585 {
586         if (tok)
587                 free(tok);
588 }
589
590 static enum event_type read_token(char **tok)
591 {
592         enum event_type type;
593
594         for (;;) {
595                 type = __read_token(tok);
596                 if (type != EVENT_SPACE)
597                         return type;
598
599                 free_token(*tok);
600         }
601
602         /* not reached */
603         return EVENT_NONE;
604 }
605
606 /* no newline */
607 static enum event_type read_token_item(char **tok)
608 {
609         enum event_type type;
610
611         for (;;) {
612                 type = __read_token(tok);
613                 if (type != EVENT_SPACE && type != EVENT_NEWLINE)
614                         return type;
615
616                 free_token(*tok);
617         }
618
619         /* not reached */
620         return EVENT_NONE;
621 }
622
623 static int test_type(enum event_type type, enum event_type expect)
624 {
625         if (type != expect) {
626                 warning("Error: expected type %d but read %d",
627                     expect, type);
628                 return -1;
629         }
630         return 0;
631 }
632
633 static int __test_type_token(enum event_type type, char *token,
634                              enum event_type expect, const char *expect_tok,
635                              bool warn)
636 {
637         if (type != expect) {
638                 if (warn)
639                         warning("Error: expected type %d but read %d",
640                                 expect, type);
641                 return -1;
642         }
643
644         if (strcmp(token, expect_tok) != 0) {
645                 if (warn)
646                         warning("Error: expected '%s' but read '%s'",
647                                 expect_tok, token);
648                 return -1;
649         }
650         return 0;
651 }
652
653 static int test_type_token(enum event_type type, char *token,
654                            enum event_type expect, const char *expect_tok)
655 {
656         return __test_type_token(type, token, expect, expect_tok, true);
657 }
658
659 static int __read_expect_type(enum event_type expect, char **tok, int newline_ok)
660 {
661         enum event_type type;
662
663         if (newline_ok)
664                 type = read_token(tok);
665         else
666                 type = read_token_item(tok);
667         return test_type(type, expect);
668 }
669
670 static int read_expect_type(enum event_type expect, char **tok)
671 {
672         return __read_expect_type(expect, tok, 1);
673 }
674
675 static int __read_expected(enum event_type expect, const char *str,
676                            int newline_ok, bool warn)
677 {
678         enum event_type type;
679         char *token;
680         int ret;
681
682         if (newline_ok)
683                 type = read_token(&token);
684         else
685                 type = read_token_item(&token);
686
687         ret = __test_type_token(type, token, expect, str, warn);
688
689         free_token(token);
690
691         return ret;
692 }
693
694 static int read_expected(enum event_type expect, const char *str)
695 {
696         return __read_expected(expect, str, 1, true);
697 }
698
699 static int read_expected_item(enum event_type expect, const char *str)
700 {
701         return __read_expected(expect, str, 0, true);
702 }
703
704 static char *event_read_name(void)
705 {
706         char *token;
707
708         if (read_expected(EVENT_ITEM, "name") < 0)
709                 return NULL;
710
711         if (read_expected(EVENT_OP, ":") < 0)
712                 return NULL;
713
714         if (read_expect_type(EVENT_ITEM, &token) < 0)
715                 goto fail;
716
717         return token;
718
719  fail:
720         free_token(token);
721         return NULL;
722 }
723
724 static int event_read_id(void)
725 {
726         char *token;
727         int id;
728
729         if (read_expected_item(EVENT_ITEM, "ID") < 0)
730                 return -1;
731
732         if (read_expected(EVENT_OP, ":") < 0)
733                 return -1;
734
735         if (read_expect_type(EVENT_ITEM, &token) < 0)
736                 goto fail;
737
738         id = strtoul(token, NULL, 0);
739         free_token(token);
740         return id;
741
742  fail:
743         free_token(token);
744         return -1;
745 }
746
747 static int field_is_string(struct format_field *field)
748 {
749         if ((field->flags & FIELD_IS_ARRAY) &&
750             (!strstr(field->type, "char") || !strstr(field->type, "u8") ||
751              !strstr(field->type, "s8")))
752                 return 1;
753
754         return 0;
755 }
756
757 static int field_is_dynamic(struct format_field *field)
758 {
759         if (!strncmp(field->type, "__data_loc", 10))
760                 return 1;
761
762         return 0;
763 }
764
765 static int event_read_fields(struct event *event, struct format_field **fields)
766 {
767         struct format_field *field = NULL;
768         enum event_type type;
769         char *token;
770         char *last_token;
771         int count = 0;
772
773         do {
774                 type = read_token(&token);
775                 if (type == EVENT_NEWLINE) {
776                         free_token(token);
777                         return count;
778                 }
779
780                 count++;
781
782                 if (test_type_token(type, token, EVENT_ITEM, "field"))
783                         goto fail;
784                 free_token(token);
785
786                 type = read_token(&token);
787                 /*
788                  * The ftrace fields may still use the "special" name.
789                  * Just ignore it.
790                  */
791                 if (event->flags & EVENT_FL_ISFTRACE &&
792                     type == EVENT_ITEM && strcmp(token, "special") == 0) {
793                         free_token(token);
794                         type = read_token(&token);
795                 }
796
797                 if (test_type_token(type, token, EVENT_OP, ":") < 0)
798                         return -1;
799
800                 if (read_expect_type(EVENT_ITEM, &token) < 0)
801                         goto fail;
802
803                 last_token = token;
804
805                 field = malloc_or_die(sizeof(*field));
806                 memset(field, 0, sizeof(*field));
807
808                 /* read the rest of the type */
809                 for (;;) {
810                         type = read_token(&token);
811                         if (type == EVENT_ITEM ||
812                             (type == EVENT_OP && strcmp(token, "*") == 0) ||
813                             /*
814                              * Some of the ftrace fields are broken and have
815                              * an illegal "." in them.
816                              */
817                             (event->flags & EVENT_FL_ISFTRACE &&
818                              type == EVENT_OP && strcmp(token, ".") == 0)) {
819
820                                 if (strcmp(token, "*") == 0)
821                                         field->flags |= FIELD_IS_POINTER;
822
823                                 if (field->type) {
824                                         field->type = realloc(field->type,
825                                                               strlen(field->type) +
826                                                               strlen(last_token) + 2);
827                                         strcat(field->type, " ");
828                                         strcat(field->type, last_token);
829                                 } else
830                                         field->type = last_token;
831                                 last_token = token;
832                                 continue;
833                         }
834
835                         break;
836                 }
837
838                 if (!field->type) {
839                         die("no type found");
840                         goto fail;
841                 }
842                 field->name = last_token;
843
844                 if (test_type(type, EVENT_OP))
845                         goto fail;
846
847                 if (strcmp(token, "[") == 0) {
848                         enum event_type last_type = type;
849                         char *brackets = token;
850                         int len;
851
852                         field->flags |= FIELD_IS_ARRAY;
853
854                         type = read_token(&token);
855                         while (strcmp(token, "]") != 0) {
856                                 if (last_type == EVENT_ITEM &&
857                                     type == EVENT_ITEM)
858                                         len = 2;
859                                 else
860                                         len = 1;
861                                 last_type = type;
862
863                                 brackets = realloc(brackets,
864                                                    strlen(brackets) +
865                                                    strlen(token) + len);
866                                 if (len == 2)
867                                         strcat(brackets, " ");
868                                 strcat(brackets, token);
869                                 free_token(token);
870                                 type = read_token(&token);
871                                 if (type == EVENT_NONE) {
872                                         die("failed to find token");
873                                         goto fail;
874                                 }
875                         }
876
877                         free_token(token);
878
879                         brackets = realloc(brackets, strlen(brackets) + 2);
880                         strcat(brackets, "]");
881
882                         /* add brackets to type */
883
884                         type = read_token(&token);
885                         /*
886                          * If the next token is not an OP, then it is of
887                          * the format: type [] item;
888                          */
889                         if (type == EVENT_ITEM) {
890                                 field->type = realloc(field->type,
891                                                       strlen(field->type) +
892                                                       strlen(field->name) +
893                                                       strlen(brackets) + 2);
894                                 strcat(field->type, " ");
895                                 strcat(field->type, field->name);
896                                 free_token(field->name);
897                                 strcat(field->type, brackets);
898                                 field->name = token;
899                                 type = read_token(&token);
900                         } else {
901                                 field->type = realloc(field->type,
902                                                       strlen(field->type) +
903                                                       strlen(brackets) + 1);
904                                 strcat(field->type, brackets);
905                         }
906                         free(brackets);
907                 }
908
909                 if (field_is_string(field)) {
910                         field->flags |= FIELD_IS_STRING;
911                         if (field_is_dynamic(field))
912                                 field->flags |= FIELD_IS_DYNAMIC;
913                 }
914
915                 if (test_type_token(type, token,  EVENT_OP, ";"))
916                         goto fail;
917                 free_token(token);
918
919                 if (read_expected(EVENT_ITEM, "offset") < 0)
920                         goto fail_expect;
921
922                 if (read_expected(EVENT_OP, ":") < 0)
923                         goto fail_expect;
924
925                 if (read_expect_type(EVENT_ITEM, &token))
926                         goto fail;
927                 field->offset = strtoul(token, NULL, 0);
928                 free_token(token);
929
930                 if (read_expected(EVENT_OP, ";") < 0)
931                         goto fail_expect;
932
933                 if (read_expected(EVENT_ITEM, "size") < 0)
934                         goto fail_expect;
935
936                 if (read_expected(EVENT_OP, ":") < 0)
937                         goto fail_expect;
938
939                 if (read_expect_type(EVENT_ITEM, &token))
940                         goto fail;
941                 field->size = strtoul(token, NULL, 0);
942                 free_token(token);
943
944                 if (read_expected(EVENT_OP, ";") < 0)
945                         goto fail_expect;
946
947                 type = read_token(&token);
948                 if (type != EVENT_NEWLINE) {
949                         /* newer versions of the kernel have a "signed" type */
950                         if (test_type_token(type, token, EVENT_ITEM, "signed"))
951                                 goto fail;
952
953                         free_token(token);
954
955                         if (read_expected(EVENT_OP, ":") < 0)
956                                 goto fail_expect;
957
958                         if (read_expect_type(EVENT_ITEM, &token))
959                                 goto fail;
960
961                         if (strtoul(token, NULL, 0))
962                                 field->flags |= FIELD_IS_SIGNED;
963
964                         free_token(token);
965                         if (read_expected(EVENT_OP, ";") < 0)
966                                 goto fail_expect;
967
968                         if (read_expect_type(EVENT_NEWLINE, &token))
969                                 goto fail;
970                 }
971
972                 free_token(token);
973
974                 *fields = field;
975                 fields = &field->next;
976
977         } while (1);
978
979         return 0;
980
981 fail:
982         free_token(token);
983 fail_expect:
984         if (field)
985                 free(field);
986         return -1;
987 }
988
989 static int event_read_format(struct event *event)
990 {
991         char *token;
992         int ret;
993
994         if (read_expected_item(EVENT_ITEM, "format") < 0)
995                 return -1;
996
997         if (read_expected(EVENT_OP, ":") < 0)
998                 return -1;
999
1000         if (read_expect_type(EVENT_NEWLINE, &token))
1001                 goto fail;
1002         free_token(token);
1003
1004         ret = event_read_fields(event, &event->format.common_fields);
1005         if (ret < 0)
1006                 return ret;
1007         event->format.nr_common = ret;
1008
1009         ret = event_read_fields(event, &event->format.fields);
1010         if (ret < 0)
1011                 return ret;
1012         event->format.nr_fields = ret;
1013
1014         return 0;
1015
1016  fail:
1017         free_token(token);
1018         return -1;
1019 }
1020
1021 enum event_type
1022 process_arg_token(struct event *event, struct print_arg *arg,
1023                   char **tok, enum event_type type);
1024
1025 static enum event_type
1026 process_arg(struct event *event, struct print_arg *arg, char **tok)
1027 {
1028         enum event_type type;
1029         char *token;
1030
1031         type = read_token(&token);
1032         *tok = token;
1033
1034         return process_arg_token(event, arg, tok, type);
1035 }
1036
1037 static enum event_type
1038 process_cond(struct event *event, struct print_arg *top, char **tok)
1039 {
1040         struct print_arg *arg, *left, *right;
1041         enum event_type type;
1042         char *token = NULL;
1043
1044         arg = malloc_or_die(sizeof(*arg));
1045         memset(arg, 0, sizeof(*arg));
1046
1047         left = malloc_or_die(sizeof(*left));
1048
1049         right = malloc_or_die(sizeof(*right));
1050
1051         arg->type = PRINT_OP;
1052         arg->op.left = left;
1053         arg->op.right = right;
1054
1055         *tok = NULL;
1056         type = process_arg(event, left, &token);
1057         if (test_type_token(type, token, EVENT_OP, ":"))
1058                 goto out_free;
1059
1060         arg->op.op = token;
1061
1062         type = process_arg(event, right, &token);
1063
1064         top->op.right = arg;
1065
1066         *tok = token;
1067         return type;
1068
1069 out_free:
1070         free_token(*tok);
1071         free(right);
1072         free(left);
1073         free_arg(arg);
1074         return EVENT_ERROR;
1075 }
1076
1077 static enum event_type
1078 process_array(struct event *event, struct print_arg *top, char **tok)
1079 {
1080         struct print_arg *arg;
1081         enum event_type type;
1082         char *token = NULL;
1083
1084         arg = malloc_or_die(sizeof(*arg));
1085         memset(arg, 0, sizeof(*arg));
1086
1087         *tok = NULL;
1088         type = process_arg(event, arg, &token);
1089         if (test_type_token(type, token, EVENT_OP, "]"))
1090                 goto out_free;
1091
1092         top->op.right = arg;
1093
1094         free_token(token);
1095         type = read_token_item(&token);
1096         *tok = token;
1097
1098         return type;
1099
1100 out_free:
1101         free_token(*tok);
1102         free_arg(arg);
1103         return EVENT_ERROR;
1104 }
1105
1106 static int get_op_prio(char *op)
1107 {
1108         if (!op[1]) {
1109                 switch (op[0]) {
1110                 case '*':
1111                 case '/':
1112                 case '%':
1113                         return 6;
1114                 case '+':
1115                 case '-':
1116                         return 7;
1117                         /* '>>' and '<<' are 8 */
1118                 case '<':
1119                 case '>':
1120                         return 9;
1121                         /* '==' and '!=' are 10 */
1122                 case '&':
1123                         return 11;
1124                 case '^':
1125                         return 12;
1126                 case '|':
1127                         return 13;
1128                 case '?':
1129                         return 16;
1130                 default:
1131                         die("unknown op '%c'", op[0]);
1132                         return -1;
1133                 }
1134         } else {
1135                 if (strcmp(op, "++") == 0 ||
1136                     strcmp(op, "--") == 0) {
1137                         return 3;
1138                 } else if (strcmp(op, ">>") == 0 ||
1139                            strcmp(op, "<<") == 0) {
1140                         return 8;
1141                 } else if (strcmp(op, ">=") == 0 ||
1142                            strcmp(op, "<=") == 0) {
1143                         return 9;
1144                 } else if (strcmp(op, "==") == 0 ||
1145                            strcmp(op, "!=") == 0) {
1146                         return 10;
1147                 } else if (strcmp(op, "&&") == 0) {
1148                         return 14;
1149                 } else if (strcmp(op, "||") == 0) {
1150                         return 15;
1151                 } else {
1152                         die("unknown op '%s'", op);
1153                         return -1;
1154                 }
1155         }
1156 }
1157
1158 static void set_op_prio(struct print_arg *arg)
1159 {
1160
1161         /* single ops are the greatest */
1162         if (!arg->op.left || arg->op.left->type == PRINT_NULL) {
1163                 arg->op.prio = 0;
1164                 return;
1165         }
1166
1167         arg->op.prio = get_op_prio(arg->op.op);
1168 }
1169
1170 static enum event_type
1171 process_op(struct event *event, struct print_arg *arg, char **tok)
1172 {
1173         struct print_arg *left, *right = NULL;
1174         enum event_type type;
1175         char *token;
1176
1177         /* the op is passed in via tok */
1178         token = *tok;
1179
1180         if (arg->type == PRINT_OP && !arg->op.left) {
1181                 /* handle single op */
1182                 if (token[1]) {
1183                         die("bad op token %s", token);
1184                         return EVENT_ERROR;
1185                 }
1186                 switch (token[0]) {
1187                 case '!':
1188                 case '+':
1189                 case '-':
1190                         break;
1191                 default:
1192                         die("bad op token %s", token);
1193                         return EVENT_ERROR;
1194                 }
1195
1196                 /* make an empty left */
1197                 left = malloc_or_die(sizeof(*left));
1198                 left->type = PRINT_NULL;
1199                 arg->op.left = left;
1200
1201                 right = malloc_or_die(sizeof(*right));
1202                 arg->op.right = right;
1203
1204                 type = process_arg(event, right, tok);
1205
1206         } else if (strcmp(token, "?") == 0) {
1207
1208                 left = malloc_or_die(sizeof(*left));
1209                 /* copy the top arg to the left */
1210                 *left = *arg;
1211
1212                 arg->type = PRINT_OP;
1213                 arg->op.op = token;
1214                 arg->op.left = left;
1215                 arg->op.prio = 0;
1216
1217                 type = process_cond(event, arg, tok);
1218
1219         } else if (strcmp(token, ">>") == 0 ||
1220                    strcmp(token, "<<") == 0 ||
1221                    strcmp(token, "&") == 0 ||
1222                    strcmp(token, "|") == 0 ||
1223                    strcmp(token, "&&") == 0 ||
1224                    strcmp(token, "||") == 0 ||
1225                    strcmp(token, "-") == 0 ||
1226                    strcmp(token, "+") == 0 ||
1227                    strcmp(token, "*") == 0 ||
1228                    strcmp(token, "^") == 0 ||
1229                    strcmp(token, "/") == 0 ||
1230                    strcmp(token, "<") == 0 ||
1231                    strcmp(token, ">") == 0 ||
1232                    strcmp(token, "==") == 0 ||
1233                    strcmp(token, "!=") == 0) {
1234
1235                 left = malloc_or_die(sizeof(*left));
1236
1237                 /* copy the top arg to the left */
1238                 *left = *arg;
1239
1240                 arg->type = PRINT_OP;
1241                 arg->op.op = token;
1242                 arg->op.left = left;
1243
1244                 set_op_prio(arg);
1245
1246                 right = malloc_or_die(sizeof(*right));
1247
1248                 type = read_token_item(&token);
1249                 *tok = token;
1250
1251                 /* could just be a type pointer */
1252                 if ((strcmp(arg->op.op, "*") == 0) &&
1253                     type == EVENT_DELIM && (strcmp(token, ")") == 0)) {
1254                         if (left->type != PRINT_ATOM)
1255                                 die("bad pointer type");
1256                         left->atom.atom = realloc(left->atom.atom,
1257                                             sizeof(left->atom.atom) + 3);
1258                         strcat(left->atom.atom, " *");
1259                         *arg = *left;
1260                         free(arg);
1261
1262                         return type;
1263                 }
1264
1265                 type = process_arg_token(event, right, tok, type);
1266
1267                 arg->op.right = right;
1268
1269         } else if (strcmp(token, "[") == 0) {
1270
1271                 left = malloc_or_die(sizeof(*left));
1272                 *left = *arg;
1273
1274                 arg->type = PRINT_OP;
1275                 arg->op.op = token;
1276                 arg->op.left = left;
1277
1278                 arg->op.prio = 0;
1279                 type = process_array(event, arg, tok);
1280
1281         } else {
1282                 warning("unknown op '%s'", token);
1283                 event->flags |= EVENT_FL_FAILED;
1284                 /* the arg is now the left side */
1285                 return EVENT_NONE;
1286         }
1287
1288         if (type == EVENT_OP) {
1289                 int prio;
1290
1291                 /* higher prios need to be closer to the root */
1292                 prio = get_op_prio(*tok);
1293
1294                 if (prio > arg->op.prio)
1295                         return process_op(event, arg, tok);
1296
1297                 return process_op(event, right, tok);
1298         }
1299
1300         return type;
1301 }
1302
1303 static enum event_type
1304 process_entry(struct event *event __unused, struct print_arg *arg,
1305               char **tok)
1306 {
1307         enum event_type type;
1308         char *field;
1309         char *token;
1310
1311         if (read_expected(EVENT_OP, "->") < 0)
1312                 return EVENT_ERROR;
1313
1314         if (read_expect_type(EVENT_ITEM, &token) < 0)
1315                 goto fail;
1316         field = token;
1317
1318         arg->type = PRINT_FIELD;
1319         arg->field.name = field;
1320
1321         if (is_flag_field) {
1322                 arg->field.field = find_any_field(event, arg->field.name);
1323                 arg->field.field->flags |= FIELD_IS_FLAG;
1324                 is_flag_field = 0;
1325         } else if (is_symbolic_field) {
1326                 arg->field.field = find_any_field(event, arg->field.name);
1327                 arg->field.field->flags |= FIELD_IS_SYMBOLIC;
1328                 is_symbolic_field = 0;
1329         }
1330
1331         type = read_token(&token);
1332         *tok = token;
1333
1334         return type;
1335
1336 fail:
1337         free_token(token);
1338         return EVENT_ERROR;
1339 }
1340
1341 static char *arg_eval (struct print_arg *arg);
1342
1343 static long long arg_num_eval(struct print_arg *arg)
1344 {
1345         long long left, right;
1346         long long val = 0;
1347
1348         switch (arg->type) {
1349         case PRINT_ATOM:
1350                 val = strtoll(arg->atom.atom, NULL, 0);
1351                 break;
1352         case PRINT_TYPE:
1353                 val = arg_num_eval(arg->typecast.item);
1354                 break;
1355         case PRINT_OP:
1356                 switch (arg->op.op[0]) {
1357                 case '|':
1358                         left = arg_num_eval(arg->op.left);
1359                         right = arg_num_eval(arg->op.right);
1360                         if (arg->op.op[1])
1361                                 val = left || right;
1362                         else
1363                                 val = left | right;
1364                         break;
1365                 case '&':
1366                         left = arg_num_eval(arg->op.left);
1367                         right = arg_num_eval(arg->op.right);
1368                         if (arg->op.op[1])
1369                                 val = left && right;
1370                         else
1371                                 val = left & right;
1372                         break;
1373                 case '<':
1374                         left = arg_num_eval(arg->op.left);
1375                         right = arg_num_eval(arg->op.right);
1376                         switch (arg->op.op[1]) {
1377                         case 0:
1378                                 val = left < right;
1379                                 break;
1380                         case '<':
1381                                 val = left << right;
1382                                 break;
1383                         case '=':
1384                                 val = left <= right;
1385                                 break;
1386                         default:
1387                                 die("unknown op '%s'", arg->op.op);
1388                         }
1389                         break;
1390                 case '>':
1391                         left = arg_num_eval(arg->op.left);
1392                         right = arg_num_eval(arg->op.right);
1393                         switch (arg->op.op[1]) {
1394                         case 0:
1395                                 val = left > right;
1396                                 break;
1397                         case '>':
1398                                 val = left >> right;
1399                                 break;
1400                         case '=':
1401                                 val = left >= right;
1402                                 break;
1403                         default:
1404                                 die("unknown op '%s'", arg->op.op);
1405                         }
1406                         break;
1407                 case '=':
1408                         left = arg_num_eval(arg->op.left);
1409                         right = arg_num_eval(arg->op.right);
1410
1411                         if (arg->op.op[1] != '=')
1412                                 die("unknown op '%s'", arg->op.op);
1413
1414                         val = left == right;
1415                         break;
1416                 case '!':
1417                         left = arg_num_eval(arg->op.left);
1418                         right = arg_num_eval(arg->op.right);
1419
1420                         switch (arg->op.op[1]) {
1421                         case '=':
1422                                 val = left != right;
1423                                 break;
1424                         default:
1425                                 die("unknown op '%s'", arg->op.op);
1426                         }
1427                         break;
1428                 default:
1429                         die("unknown op '%s'", arg->op.op);
1430                 }
1431                 break;
1432
1433         case PRINT_NULL:
1434         case PRINT_FIELD ... PRINT_SYMBOL:
1435         case PRINT_STRING:
1436         default:
1437                 die("invalid eval type %d", arg->type);
1438
1439         }
1440         return val;
1441 }
1442
1443 static char *arg_eval (struct print_arg *arg)
1444 {
1445         long long val;
1446         static char buf[20];
1447
1448         switch (arg->type) {
1449         case PRINT_ATOM:
1450                 return arg->atom.atom;
1451         case PRINT_TYPE:
1452                 return arg_eval(arg->typecast.item);
1453         case PRINT_OP:
1454                 val = arg_num_eval(arg);
1455                 sprintf(buf, "%lld", val);
1456                 return buf;
1457
1458         case PRINT_NULL:
1459         case PRINT_FIELD ... PRINT_SYMBOL:
1460         case PRINT_STRING:
1461         default:
1462                 die("invalid eval type %d", arg->type);
1463                 break;
1464         }
1465
1466         return NULL;
1467 }
1468
1469 static enum event_type
1470 process_fields(struct event *event, struct print_flag_sym **list, char **tok)
1471 {
1472         enum event_type type;
1473         struct print_arg *arg = NULL;
1474         struct print_flag_sym *field;
1475         char *token = NULL;
1476         char *value;
1477
1478         do {
1479                 free_token(token);
1480                 type = read_token_item(&token);
1481                 if (test_type_token(type, token, EVENT_OP, "{"))
1482                         break;
1483
1484                 arg = malloc_or_die(sizeof(*arg));
1485
1486                 free_token(token);
1487                 type = process_arg(event, arg, &token);
1488                 if (test_type_token(type, token, EVENT_DELIM, ","))
1489                         goto out_free;
1490
1491                 field = malloc_or_die(sizeof(*field));
1492                 memset(field, 0, sizeof(*field));
1493
1494                 value = arg_eval(arg);
1495                 field->value = strdup(value);
1496
1497                 free_token(token);
1498                 type = process_arg(event, arg, &token);
1499                 if (test_type_token(type, token, EVENT_OP, "}"))
1500                         goto out_free;
1501
1502                 value = arg_eval(arg);
1503                 field->str = strdup(value);
1504                 free_arg(arg);
1505                 arg = NULL;
1506
1507                 *list = field;
1508                 list = &field->next;
1509
1510                 free_token(token);
1511                 type = read_token_item(&token);
1512         } while (type == EVENT_DELIM && strcmp(token, ",") == 0);
1513
1514         *tok = token;
1515         return type;
1516
1517 out_free:
1518         free_arg(arg);
1519         free_token(token);
1520
1521         return EVENT_ERROR;
1522 }
1523
1524 static enum event_type
1525 process_flags(struct event *event, struct print_arg *arg, char **tok)
1526 {
1527         struct print_arg *field;
1528         enum event_type type;
1529         char *token;
1530
1531         memset(arg, 0, sizeof(*arg));
1532         arg->type = PRINT_FLAGS;
1533
1534         if (read_expected_item(EVENT_DELIM, "(") < 0)
1535                 return EVENT_ERROR;
1536
1537         field = malloc_or_die(sizeof(*field));
1538
1539         type = process_arg(event, field, &token);
1540         while (type == EVENT_OP)
1541                 type = process_op(event, field, &token);
1542         if (test_type_token(type, token, EVENT_DELIM, ","))
1543                 goto out_free;
1544
1545         arg->flags.field = field;
1546
1547         type = read_token_item(&token);
1548         if (event_item_type(type)) {
1549                 arg->flags.delim = token;
1550                 type = read_token_item(&token);
1551         }
1552
1553         if (test_type_token(type, token, EVENT_DELIM, ","))
1554                 goto out_free;
1555
1556         type = process_fields(event, &arg->flags.flags, &token);
1557         if (test_type_token(type, token, EVENT_DELIM, ")"))
1558                 goto out_free;
1559
1560         free_token(token);
1561         type = read_token_item(tok);
1562         return type;
1563
1564 out_free:
1565         free_token(token);
1566         return EVENT_ERROR;
1567 }
1568
1569 static enum event_type
1570 process_symbols(struct event *event, struct print_arg *arg, char **tok)
1571 {
1572         struct print_arg *field;
1573         enum event_type type;
1574         char *token;
1575
1576         memset(arg, 0, sizeof(*arg));
1577         arg->type = PRINT_SYMBOL;
1578
1579         if (read_expected_item(EVENT_DELIM, "(") < 0)
1580                 return EVENT_ERROR;
1581
1582         field = malloc_or_die(sizeof(*field));
1583
1584         type = process_arg(event, field, &token);
1585         while (type == EVENT_OP)
1586                 type = process_op(event, field, &token);
1587         if (test_type_token(type, token, EVENT_DELIM, ","))
1588                 goto out_free;
1589
1590         arg->symbol.field = field;
1591
1592         type = process_fields(event, &arg->symbol.symbols, &token);
1593         if (test_type_token(type, token, EVENT_DELIM, ")"))
1594                 goto out_free;
1595
1596         free_token(token);
1597         type = read_token_item(tok);
1598         return type;
1599
1600 out_free:
1601         free_token(token);
1602         return EVENT_ERROR;
1603 }
1604
1605 static enum event_type
1606 process_paren(struct event *event, struct print_arg *arg, char **tok)
1607 {
1608         struct print_arg *item_arg;
1609         enum event_type type;
1610         char *token;
1611
1612         type = process_arg(event, arg, &token);
1613
1614         if (type == EVENT_ERROR)
1615                 return EVENT_ERROR;
1616
1617         if (type == EVENT_OP)
1618                 type = process_op(event, arg, &token);
1619
1620         if (type == EVENT_ERROR)
1621                 return EVENT_ERROR;
1622
1623         if (test_type_token(type, token, EVENT_DELIM, ")")) {
1624                 free_token(token);
1625                 return EVENT_ERROR;
1626         }
1627
1628         free_token(token);
1629         type = read_token_item(&token);
1630
1631         /*
1632          * If the next token is an item or another open paren, then
1633          * this was a typecast.
1634          */
1635         if (event_item_type(type) ||
1636             (type == EVENT_DELIM && strcmp(token, "(") == 0)) {
1637
1638                 /* make this a typecast and contine */
1639
1640                 /* prevous must be an atom */
1641                 if (arg->type != PRINT_ATOM)
1642                         die("previous needed to be PRINT_ATOM");
1643
1644                 item_arg = malloc_or_die(sizeof(*item_arg));
1645
1646                 arg->type = PRINT_TYPE;
1647                 arg->typecast.type = arg->atom.atom;
1648                 arg->typecast.item = item_arg;
1649                 type = process_arg_token(event, item_arg, &token, type);
1650
1651         }
1652
1653         *tok = token;
1654         return type;
1655 }
1656
1657
1658 static enum event_type
1659 process_str(struct event *event __unused, struct print_arg *arg, char **tok)
1660 {
1661         enum event_type type;
1662         char *token;
1663
1664         if (read_expected(EVENT_DELIM, "(") < 0)
1665                 return EVENT_ERROR;
1666
1667         if (read_expect_type(EVENT_ITEM, &token) < 0)
1668                 goto fail;
1669
1670         arg->type = PRINT_STRING;
1671         arg->string.string = token;
1672         arg->string.offset = -1;
1673
1674         if (read_expected(EVENT_DELIM, ")") < 0)
1675                 return EVENT_ERROR;
1676
1677         type = read_token(&token);
1678         *tok = token;
1679
1680         return type;
1681 fail:
1682         free_token(token);
1683         return EVENT_ERROR;
1684 }
1685
1686 enum event_type
1687 process_arg_token(struct event *event, struct print_arg *arg,
1688                   char **tok, enum event_type type)
1689 {
1690         char *token;
1691         char *atom;
1692
1693         token = *tok;
1694
1695         switch (type) {
1696         case EVENT_ITEM:
1697                 if (strcmp(token, "REC") == 0) {
1698                         free_token(token);
1699                         type = process_entry(event, arg, &token);
1700                 } else if (strcmp(token, "__print_flags") == 0) {
1701                         free_token(token);
1702                         is_flag_field = 1;
1703                         type = process_flags(event, arg, &token);
1704                 } else if (strcmp(token, "__print_symbolic") == 0) {
1705                         free_token(token);
1706                         is_symbolic_field = 1;
1707                         type = process_symbols(event, arg, &token);
1708                 } else if (strcmp(token, "__get_str") == 0) {
1709                         free_token(token);
1710                         type = process_str(event, arg, &token);
1711                 } else {
1712                         atom = token;
1713                         /* test the next token */
1714                         type = read_token_item(&token);
1715
1716                         /* atoms can be more than one token long */
1717                         while (type == EVENT_ITEM) {
1718                                 atom = realloc(atom, strlen(atom) + strlen(token) + 2);
1719                                 strcat(atom, " ");
1720                                 strcat(atom, token);
1721                                 free_token(token);
1722                                 type = read_token_item(&token);
1723                         }
1724
1725                         /* todo, test for function */
1726
1727                         arg->type = PRINT_ATOM;
1728                         arg->atom.atom = atom;
1729                 }
1730                 break;
1731         case EVENT_DQUOTE:
1732         case EVENT_SQUOTE:
1733                 arg->type = PRINT_ATOM;
1734                 arg->atom.atom = token;
1735                 type = read_token_item(&token);
1736                 break;
1737         case EVENT_DELIM:
1738                 if (strcmp(token, "(") == 0) {
1739                         free_token(token);
1740                         type = process_paren(event, arg, &token);
1741                         break;
1742                 }
1743         case EVENT_OP:
1744                 /* handle single ops */
1745                 arg->type = PRINT_OP;
1746                 arg->op.op = token;
1747                 arg->op.left = NULL;
1748                 type = process_op(event, arg, &token);
1749
1750                 break;
1751
1752         case EVENT_ERROR ... EVENT_NEWLINE:
1753         default:
1754                 die("unexpected type %d", type);
1755         }
1756         *tok = token;
1757
1758         return type;
1759 }
1760
1761 static int event_read_print_args(struct event *event, struct print_arg **list)
1762 {
1763         enum event_type type = EVENT_ERROR;
1764         struct print_arg *arg;
1765         char *token;
1766         int args = 0;
1767
1768         do {
1769                 if (type == EVENT_NEWLINE) {
1770                         free_token(token);
1771                         type = read_token_item(&token);
1772                         continue;
1773                 }
1774
1775                 arg = malloc_or_die(sizeof(*arg));
1776                 memset(arg, 0, sizeof(*arg));
1777
1778                 type = process_arg(event, arg, &token);
1779
1780                 if (type == EVENT_ERROR) {
1781                         free_arg(arg);
1782                         return -1;
1783                 }
1784
1785                 *list = arg;
1786                 args++;
1787
1788                 if (type == EVENT_OP) {
1789                         type = process_op(event, arg, &token);
1790                         list = &arg->next;
1791                         continue;
1792                 }
1793
1794                 if (type == EVENT_DELIM && strcmp(token, ",") == 0) {
1795                         free_token(token);
1796                         *list = arg;
1797                         list = &arg->next;
1798                         continue;
1799                 }
1800                 break;
1801         } while (type != EVENT_NONE);
1802
1803         if (type != EVENT_NONE)
1804                 free_token(token);
1805
1806         return args;
1807 }
1808
1809 static int event_read_print(struct event *event)
1810 {
1811         enum event_type type;
1812         char *token;
1813         int ret;
1814
1815         if (read_expected_item(EVENT_ITEM, "print") < 0)
1816                 return -1;
1817
1818         if (read_expected(EVENT_ITEM, "fmt") < 0)
1819                 return -1;
1820
1821         if (read_expected(EVENT_OP, ":") < 0)
1822                 return -1;
1823
1824         if (read_expect_type(EVENT_DQUOTE, &token) < 0)
1825                 goto fail;
1826
1827  concat:
1828         event->print_fmt.format = token;
1829         event->print_fmt.args = NULL;
1830
1831         /* ok to have no arg */
1832         type = read_token_item(&token);
1833
1834         if (type == EVENT_NONE)
1835                 return 0;
1836
1837         /* Handle concatination of print lines */
1838         if (type == EVENT_DQUOTE) {
1839                 char *cat;
1840
1841                 cat = malloc_or_die(strlen(event->print_fmt.format) +
1842                                     strlen(token) + 1);
1843                 strcpy(cat, event->print_fmt.format);
1844                 strcat(cat, token);
1845                 free_token(token);
1846                 free_token(event->print_fmt.format);
1847                 event->print_fmt.format = NULL;
1848                 token = cat;
1849                 goto concat;
1850         }
1851
1852         if (test_type_token(type, token, EVENT_DELIM, ","))
1853                 goto fail;
1854
1855         free_token(token);
1856
1857         ret = event_read_print_args(event, &event->print_fmt.args);
1858         if (ret < 0)
1859                 return -1;
1860
1861         return ret;
1862
1863  fail:
1864         free_token(token);
1865         return -1;
1866 }
1867
1868 static struct format_field *
1869 find_common_field(struct event *event, const char *name)
1870 {
1871         struct format_field *format;
1872
1873         for (format = event->format.common_fields;
1874              format; format = format->next) {
1875                 if (strcmp(format->name, name) == 0)
1876                         break;
1877         }
1878
1879         return format;
1880 }
1881
1882 static struct format_field *
1883 find_field(struct event *event, const char *name)
1884 {
1885         struct format_field *format;
1886
1887         for (format = event->format.fields;
1888              format; format = format->next) {
1889                 if (strcmp(format->name, name) == 0)
1890                         break;
1891         }
1892
1893         return format;
1894 }
1895
1896 static struct format_field *
1897 find_any_field(struct event *event, const char *name)
1898 {
1899         struct format_field *format;
1900
1901         format = find_common_field(event, name);
1902         if (format)
1903                 return format;
1904         return find_field(event, name);
1905 }
1906
1907 unsigned long long read_size(void *ptr, int size)
1908 {
1909         switch (size) {
1910         case 1:
1911                 return *(unsigned char *)ptr;
1912         case 2:
1913                 return data2host2(ptr);
1914         case 4:
1915                 return data2host4(ptr);
1916         case 8:
1917                 return data2host8(ptr);
1918         default:
1919                 /* BUG! */
1920                 return 0;
1921         }
1922 }
1923
1924 unsigned long long
1925 raw_field_value(struct event *event, const char *name, void *data)
1926 {
1927         struct format_field *field;
1928
1929         field = find_any_field(event, name);
1930         if (!field)
1931                 return 0ULL;
1932
1933         return read_size(data + field->offset, field->size);
1934 }
1935
1936 void *raw_field_ptr(struct event *event, const char *name, void *data)
1937 {
1938         struct format_field *field;
1939
1940         field = find_any_field(event, name);
1941         if (!field)
1942                 return NULL;
1943
1944         if (field->flags & FIELD_IS_DYNAMIC) {
1945                 int offset;
1946
1947                 offset = *(int *)(data + field->offset);
1948                 offset &= 0xffff;
1949
1950                 return data + offset;
1951         }
1952
1953         return data + field->offset;
1954 }
1955
1956 static int get_common_info(const char *type, int *offset, int *size)
1957 {
1958         struct event *event;
1959         struct format_field *field;
1960
1961         /*
1962          * All events should have the same common elements.
1963          * Pick any event to find where the type is;
1964          */
1965         if (!event_list)
1966                 die("no event_list!");
1967
1968         event = event_list;
1969         field = find_common_field(event, type);
1970         if (!field)
1971                 die("field '%s' not found", type);
1972
1973         *offset = field->offset;
1974         *size = field->size;
1975
1976         return 0;
1977 }
1978
1979 static int __parse_common(void *data, int *size, int *offset,
1980                           const char *name)
1981 {
1982         int ret;
1983
1984         if (!*size) {
1985                 ret = get_common_info(name, offset, size);
1986                 if (ret < 0)
1987                         return ret;
1988         }
1989         return read_size(data + *offset, *size);
1990 }
1991
1992 int trace_parse_common_type(void *data)
1993 {
1994         static int type_offset;
1995         static int type_size;
1996
1997         return __parse_common(data, &type_size, &type_offset,
1998                               "common_type");
1999 }
2000
2001 int trace_parse_common_pid(void *data)
2002 {
2003         static int pid_offset;
2004         static int pid_size;
2005
2006         return __parse_common(data, &pid_size, &pid_offset,
2007                               "common_pid");
2008 }
2009
2010 int parse_common_pc(void *data)
2011 {
2012         static int pc_offset;
2013         static int pc_size;
2014
2015         return __parse_common(data, &pc_size, &pc_offset,
2016                               "common_preempt_count");
2017 }
2018
2019 int parse_common_flags(void *data)
2020 {
2021         static int flags_offset;
2022         static int flags_size;
2023
2024         return __parse_common(data, &flags_size, &flags_offset,
2025                               "common_flags");
2026 }
2027
2028 int parse_common_lock_depth(void *data)
2029 {
2030         static int ld_offset;
2031         static int ld_size;
2032         int ret;
2033
2034         ret = __parse_common(data, &ld_size, &ld_offset,
2035                              "common_lock_depth");
2036         if (ret < 0)
2037                 return -1;
2038
2039         return ret;
2040 }
2041
2042 struct event *trace_find_event(int id)
2043 {
2044         struct event *event;
2045
2046         for (event = event_list; event; event = event->next) {
2047                 if (event->id == id)
2048                         break;
2049         }
2050         return event;
2051 }
2052
2053 struct event *trace_find_next_event(struct event *event)
2054 {
2055         if (!event)
2056                 return event_list;
2057
2058         return event->next;
2059 }
2060
2061 static unsigned long long eval_num_arg(void *data, int size,
2062                                    struct event *event, struct print_arg *arg)
2063 {
2064         unsigned long long val = 0;
2065         unsigned long long left, right;
2066         struct print_arg *larg;
2067
2068         switch (arg->type) {
2069         case PRINT_NULL:
2070                 /* ?? */
2071                 return 0;
2072         case PRINT_ATOM:
2073                 return strtoull(arg->atom.atom, NULL, 0);
2074         case PRINT_FIELD:
2075                 if (!arg->field.field) {
2076                         arg->field.field = find_any_field(event, arg->field.name);
2077                         if (!arg->field.field)
2078                                 die("field %s not found", arg->field.name);
2079                 }
2080                 /* must be a number */
2081                 val = read_size(data + arg->field.field->offset,
2082                                 arg->field.field->size);
2083                 break;
2084         case PRINT_FLAGS:
2085         case PRINT_SYMBOL:
2086                 break;
2087         case PRINT_TYPE:
2088                 return eval_num_arg(data, size, event, arg->typecast.item);
2089         case PRINT_STRING:
2090                 return 0;
2091                 break;
2092         case PRINT_OP:
2093                 if (strcmp(arg->op.op, "[") == 0) {
2094                         /*
2095                          * Arrays are special, since we don't want
2096                          * to read the arg as is.
2097                          */
2098                         if (arg->op.left->type != PRINT_FIELD)
2099                                 goto default_op; /* oops, all bets off */
2100                         larg = arg->op.left;
2101                         if (!larg->field.field) {
2102                                 larg->field.field =
2103                                         find_any_field(event, larg->field.name);
2104                                 if (!larg->field.field)
2105                                         die("field %s not found", larg->field.name);
2106                         }
2107                         right = eval_num_arg(data, size, event, arg->op.right);
2108                         val = read_size(data + larg->field.field->offset +
2109                                         right * long_size, long_size);
2110                         break;
2111                 }
2112  default_op:
2113                 left = eval_num_arg(data, size, event, arg->op.left);
2114                 right = eval_num_arg(data, size, event, arg->op.right);
2115                 switch (arg->op.op[0]) {
2116                 case '|':
2117                         if (arg->op.op[1])
2118                                 val = left || right;
2119                         else
2120                                 val = left | right;
2121                         break;
2122                 case '&':
2123                         if (arg->op.op[1])
2124                                 val = left && right;
2125                         else
2126                                 val = left & right;
2127                         break;
2128                 case '<':
2129                         switch (arg->op.op[1]) {
2130                         case 0:
2131                                 val = left < right;
2132                                 break;
2133                         case '<':
2134                                 val = left << right;
2135                                 break;
2136                         case '=':
2137                                 val = left <= right;
2138                                 break;
2139                         default:
2140                                 die("unknown op '%s'", arg->op.op);
2141                         }
2142                         break;
2143                 case '>':
2144                         switch (arg->op.op[1]) {
2145                         case 0:
2146                                 val = left > right;
2147                                 break;
2148                         case '>':
2149                                 val = left >> right;
2150                                 break;
2151                         case '=':
2152                                 val = left >= right;
2153                                 break;
2154                         default:
2155                                 die("unknown op '%s'", arg->op.op);
2156                         }
2157                         break;
2158                 case '=':
2159                         if (arg->op.op[1] != '=')
2160                                 die("unknown op '%s'", arg->op.op);
2161                         val = left == right;
2162                         break;
2163                 case '-':
2164                         val = left - right;
2165                         break;
2166                 case '+':
2167                         val = left + right;
2168                         break;
2169                 default:
2170                         die("unknown op '%s'", arg->op.op);
2171                 }
2172                 break;
2173         default: /* not sure what to do there */
2174                 return 0;
2175         }
2176         return val;
2177 }
2178
2179 struct flag {
2180         const char *name;
2181         unsigned long long value;
2182 };
2183
2184 static const struct flag flags[] = {
2185         { "HI_SOFTIRQ", 0 },
2186         { "TIMER_SOFTIRQ", 1 },
2187         { "NET_TX_SOFTIRQ", 2 },
2188         { "NET_RX_SOFTIRQ", 3 },
2189         { "BLOCK_SOFTIRQ", 4 },
2190         { "BLOCK_IOPOLL_SOFTIRQ", 5 },
2191         { "TASKLET_SOFTIRQ", 6 },
2192         { "SCHED_SOFTIRQ", 7 },
2193         { "HRTIMER_SOFTIRQ", 8 },
2194         { "RCU_SOFTIRQ", 9 },
2195
2196         { "HRTIMER_NORESTART", 0 },
2197         { "HRTIMER_RESTART", 1 },
2198 };
2199
2200 unsigned long long eval_flag(const char *flag)
2201 {
2202         int i;
2203
2204         /*
2205          * Some flags in the format files do not get converted.
2206          * If the flag is not numeric, see if it is something that
2207          * we already know about.
2208          */
2209         if (isdigit(flag[0]))
2210                 return strtoull(flag, NULL, 0);
2211
2212         for (i = 0; i < (int)(sizeof(flags)/sizeof(flags[0])); i++)
2213                 if (strcmp(flags[i].name, flag) == 0)
2214                         return flags[i].value;
2215
2216         return 0;
2217 }
2218
2219 static void print_str_arg(void *data, int size,
2220                           struct event *event, struct print_arg *arg)
2221 {
2222         struct print_flag_sym *flag;
2223         unsigned long long val, fval;
2224         char *str;
2225         int print;
2226
2227         switch (arg->type) {
2228         case PRINT_NULL:
2229                 /* ?? */
2230                 return;
2231         case PRINT_ATOM:
2232                 printf("%s", arg->atom.atom);
2233                 return;
2234         case PRINT_FIELD:
2235                 if (!arg->field.field) {
2236                         arg->field.field = find_any_field(event, arg->field.name);
2237                         if (!arg->field.field)
2238                                 die("field %s not found", arg->field.name);
2239                 }
2240                 str = malloc_or_die(arg->field.field->size + 1);
2241                 memcpy(str, data + arg->field.field->offset,
2242                        arg->field.field->size);
2243                 str[arg->field.field->size] = 0;
2244                 printf("%s", str);
2245                 free(str);
2246                 break;
2247         case PRINT_FLAGS:
2248                 val = eval_num_arg(data, size, event, arg->flags.field);
2249                 print = 0;
2250                 for (flag = arg->flags.flags; flag; flag = flag->next) {
2251                         fval = eval_flag(flag->value);
2252                         if (!val && !fval) {
2253                                 printf("%s", flag->str);
2254                                 break;
2255                         }
2256                         if (fval && (val & fval) == fval) {
2257                                 if (print && arg->flags.delim)
2258                                         printf("%s", arg->flags.delim);
2259                                 printf("%s", flag->str);
2260                                 print = 1;
2261                                 val &= ~fval;
2262                         }
2263                 }
2264                 break;
2265         case PRINT_SYMBOL:
2266                 val = eval_num_arg(data, size, event, arg->symbol.field);
2267                 for (flag = arg->symbol.symbols; flag; flag = flag->next) {
2268                         fval = eval_flag(flag->value);
2269                         if (val == fval) {
2270                                 printf("%s", flag->str);
2271                                 break;
2272                         }
2273                 }
2274                 break;
2275
2276         case PRINT_TYPE:
2277                 break;
2278         case PRINT_STRING: {
2279                 int str_offset;
2280
2281                 if (arg->string.offset == -1) {
2282                         struct format_field *f;
2283
2284                         f = find_any_field(event, arg->string.string);
2285                         arg->string.offset = f->offset;
2286                 }
2287                 str_offset = *(int *)(data + arg->string.offset);
2288                 str_offset &= 0xffff;
2289                 printf("%s", ((char *)data) + str_offset);
2290                 break;
2291         }
2292         case PRINT_OP:
2293                 /*
2294                  * The only op for string should be ? :
2295                  */
2296                 if (arg->op.op[0] != '?')
2297                         return;
2298                 val = eval_num_arg(data, size, event, arg->op.left);
2299                 if (val)
2300                         print_str_arg(data, size, event, arg->op.right->op.left);
2301                 else
2302                         print_str_arg(data, size, event, arg->op.right->op.right);
2303                 break;
2304         default:
2305                 /* well... */
2306                 break;
2307         }
2308 }
2309
2310 static struct print_arg *make_bprint_args(char *fmt, void *data, int size, struct event *event)
2311 {
2312         static struct format_field *field, *ip_field;
2313         struct print_arg *args, *arg, **next;
2314         unsigned long long ip, val;
2315         char *ptr;
2316         void *bptr;
2317
2318         if (!field) {
2319                 field = find_field(event, "buf");
2320                 if (!field)
2321                         die("can't find buffer field for binary printk");
2322                 ip_field = find_field(event, "ip");
2323                 if (!ip_field)
2324                         die("can't find ip field for binary printk");
2325         }
2326
2327         ip = read_size(data + ip_field->offset, ip_field->size);
2328
2329         /*
2330          * The first arg is the IP pointer.
2331          */
2332         args = malloc_or_die(sizeof(*args));
2333         arg = args;
2334         arg->next = NULL;
2335         next = &arg->next;
2336
2337         arg->type = PRINT_ATOM;
2338         arg->atom.atom = malloc_or_die(32);
2339         sprintf(arg->atom.atom, "%lld", ip);
2340
2341         /* skip the first "%pf : " */
2342         for (ptr = fmt + 6, bptr = data + field->offset;
2343              bptr < data + size && *ptr; ptr++) {
2344                 int ls = 0;
2345
2346                 if (*ptr == '%') {
2347  process_again:
2348                         ptr++;
2349                         switch (*ptr) {
2350                         case '%':
2351                                 break;
2352                         case 'l':
2353                                 ls++;
2354                                 goto process_again;
2355                         case 'L':
2356                                 ls = 2;
2357                                 goto process_again;
2358                         case '0' ... '9':
2359                                 goto process_again;
2360                         case 'p':
2361                                 ls = 1;
2362                                 /* fall through */
2363                         case 'd':
2364                         case 'u':
2365                         case 'x':
2366                         case 'i':
2367                                 /* the pointers are always 4 bytes aligned */
2368                                 bptr = (void *)(((unsigned long)bptr + 3) &
2369                                                 ~3);
2370                                 switch (ls) {
2371                                 case 0:
2372                                 case 1:
2373                                         ls = long_size;
2374                                         break;
2375                                 case 2:
2376                                         ls = 8;
2377                                 default:
2378                                         break;
2379                                 }
2380                                 val = read_size(bptr, ls);
2381                                 bptr += ls;
2382                                 arg = malloc_or_die(sizeof(*arg));
2383                                 arg->next = NULL;
2384                                 arg->type = PRINT_ATOM;
2385                                 arg->atom.atom = malloc_or_die(32);
2386                                 sprintf(arg->atom.atom, "%lld", val);
2387                                 *next = arg;
2388                                 next = &arg->next;
2389                                 break;
2390                         case 's':
2391                                 arg = malloc_or_die(sizeof(*arg));
2392                                 arg->next = NULL;
2393                                 arg->type = PRINT_STRING;
2394                                 arg->string.string = strdup(bptr);
2395                                 bptr += strlen(bptr) + 1;
2396                                 *next = arg;
2397                                 next = &arg->next;
2398                         default:
2399                                 break;
2400                         }
2401                 }
2402         }
2403
2404         return args;
2405 }
2406
2407 static void free_args(struct print_arg *args)
2408 {
2409         struct print_arg *next;
2410
2411         while (args) {
2412                 next = args->next;
2413
2414                 if (args->type == PRINT_ATOM)
2415                         free(args->atom.atom);
2416                 else
2417                         free(args->string.string);
2418                 free(args);
2419                 args = next;
2420         }
2421 }
2422
2423 static char *get_bprint_format(void *data, int size __unused, struct event *event)
2424 {
2425         unsigned long long addr;
2426         static struct format_field *field;
2427         struct printk_map *printk;
2428         char *format;
2429         char *p;
2430
2431         if (!field) {
2432                 field = find_field(event, "fmt");
2433                 if (!field)
2434                         die("can't find format field for binary printk");
2435                 printf("field->offset = %d size=%d\n", field->offset, field->size);
2436         }
2437
2438         addr = read_size(data + field->offset, field->size);
2439
2440         printk = find_printk(addr);
2441         if (!printk) {
2442                 format = malloc_or_die(45);
2443                 sprintf(format, "%%pf : (NO FORMAT FOUND at %llx)\n",
2444                         addr);
2445                 return format;
2446         }
2447
2448         p = printk->printk;
2449         /* Remove any quotes. */
2450         if (*p == '"')
2451                 p++;
2452         format = malloc_or_die(strlen(p) + 10);
2453         sprintf(format, "%s : %s", "%pf", p);
2454         /* remove ending quotes and new line since we will add one too */
2455         p = format + strlen(format) - 1;
2456         if (*p == '"')
2457                 *p = 0;
2458
2459         p -= 2;
2460         if (strcmp(p, "\\n") == 0)
2461                 *p = 0;
2462
2463         return format;
2464 }
2465
2466 static void pretty_print(void *data, int size, struct event *event)
2467 {
2468         struct print_fmt *print_fmt = &event->print_fmt;
2469         struct print_arg *arg = print_fmt->args;
2470         struct print_arg *args = NULL;
2471         const char *ptr = print_fmt->format;
2472         unsigned long long val;
2473         struct func_map *func;
2474         const char *saveptr;
2475         char *bprint_fmt = NULL;
2476         char format[32];
2477         int show_func;
2478         int len;
2479         int ls;
2480
2481         if (event->flags & EVENT_FL_ISFUNC)
2482                 ptr = " %pF <-- %pF";
2483
2484         if (event->flags & EVENT_FL_ISBPRINT) {
2485                 bprint_fmt = get_bprint_format(data, size, event);
2486                 args = make_bprint_args(bprint_fmt, data, size, event);
2487                 arg = args;
2488                 ptr = bprint_fmt;
2489         }
2490
2491         for (; *ptr; ptr++) {
2492                 ls = 0;
2493                 if (*ptr == '\\') {
2494                         ptr++;
2495                         switch (*ptr) {
2496                         case 'n':
2497                                 printf("\n");
2498                                 break;
2499                         case 't':
2500                                 printf("\t");
2501                                 break;
2502                         case 'r':
2503                                 printf("\r");
2504                                 break;
2505                         case '\\':
2506                                 printf("\\");
2507                                 break;
2508                         default:
2509                                 printf("%c", *ptr);
2510                                 break;
2511                         }
2512
2513                 } else if (*ptr == '%') {
2514                         saveptr = ptr;
2515                         show_func = 0;
2516  cont_process:
2517                         ptr++;
2518                         switch (*ptr) {
2519                         case '%':
2520                                 printf("%%");
2521                                 break;
2522                         case 'l':
2523                                 ls++;
2524                                 goto cont_process;
2525                         case 'L':
2526                                 ls = 2;
2527                                 goto cont_process;
2528                         case 'z':
2529                         case 'Z':
2530                         case '0' ... '9':
2531                                 goto cont_process;
2532                         case 'p':
2533                                 if (long_size == 4)
2534                                         ls = 1;
2535                                 else
2536                                         ls = 2;
2537
2538                                 if (*(ptr+1) == 'F' ||
2539                                     *(ptr+1) == 'f') {
2540                                         ptr++;
2541                                         show_func = *ptr;
2542                                 }
2543
2544                                 /* fall through */
2545                         case 'd':
2546                         case 'i':
2547                         case 'x':
2548                         case 'X':
2549                         case 'u':
2550                                 if (!arg)
2551                                         die("no argument match");
2552
2553                                 len = ((unsigned long)ptr + 1) -
2554                                         (unsigned long)saveptr;
2555
2556                                 /* should never happen */
2557                                 if (len > 32)
2558                                         die("bad format!");
2559
2560                                 memcpy(format, saveptr, len);
2561                                 format[len] = 0;
2562
2563                                 val = eval_num_arg(data, size, event, arg);
2564                                 arg = arg->next;
2565
2566                                 if (show_func) {
2567                                         func = find_func(val);
2568                                         if (func) {
2569                                                 printf("%s", func->func);
2570                                                 if (show_func == 'F')
2571                                                         printf("+0x%llx",
2572                                                                val - func->addr);
2573                                                 break;
2574                                         }
2575                                 }
2576                                 switch (ls) {
2577                                 case 0:
2578                                         printf(format, (int)val);
2579                                         break;
2580                                 case 1:
2581                                         printf(format, (long)val);
2582                                         break;
2583                                 case 2:
2584                                         printf(format, (long long)val);
2585                                         break;
2586                                 default:
2587                                         die("bad count (%d)", ls);
2588                                 }
2589                                 break;
2590                         case 's':
2591                                 if (!arg)
2592                                         die("no matching argument");
2593
2594                                 print_str_arg(data, size, event, arg);
2595                                 arg = arg->next;
2596                                 break;
2597                         default:
2598                                 printf(">%c<", *ptr);
2599
2600                         }
2601                 } else
2602                         printf("%c", *ptr);
2603         }
2604
2605         if (args) {
2606                 free_args(args);
2607                 free(bprint_fmt);
2608         }
2609 }
2610
2611 static inline int log10_cpu(int nb)
2612 {
2613         if (nb / 100)
2614                 return 3;
2615         if (nb / 10)
2616                 return 2;
2617         return 1;
2618 }
2619
2620 static void print_lat_fmt(void *data, int size __unused)
2621 {
2622         unsigned int lat_flags;
2623         unsigned int pc;
2624         int lock_depth;
2625         int hardirq;
2626         int softirq;
2627
2628         lat_flags = parse_common_flags(data);
2629         pc = parse_common_pc(data);
2630         lock_depth = parse_common_lock_depth(data);
2631
2632         hardirq = lat_flags & TRACE_FLAG_HARDIRQ;
2633         softirq = lat_flags & TRACE_FLAG_SOFTIRQ;
2634
2635         printf("%c%c%c",
2636                (lat_flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
2637                (lat_flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
2638                'X' : '.',
2639                (lat_flags & TRACE_FLAG_NEED_RESCHED) ?
2640                'N' : '.',
2641                (hardirq && softirq) ? 'H' :
2642                hardirq ? 'h' : softirq ? 's' : '.');
2643
2644         if (pc)
2645                 printf("%x", pc);
2646         else
2647                 printf(".");
2648
2649         if (lock_depth < 0)
2650                 printf(". ");
2651         else
2652                 printf("%d ", lock_depth);
2653 }
2654
2655 #define TRACE_GRAPH_INDENT      2
2656
2657 static struct record *
2658 get_return_for_leaf(int cpu, int cur_pid, unsigned long long cur_func,
2659                     struct record *next)
2660 {
2661         struct format_field *field;
2662         struct event *event;
2663         unsigned long val;
2664         int type;
2665         int pid;
2666
2667         type = trace_parse_common_type(next->data);
2668         event = trace_find_event(type);
2669         if (!event)
2670                 return NULL;
2671
2672         if (!(event->flags & EVENT_FL_ISFUNCRET))
2673                 return NULL;
2674
2675         pid = trace_parse_common_pid(next->data);
2676         field = find_field(event, "func");
2677         if (!field)
2678                 die("function return does not have field func");
2679
2680         val = read_size(next->data + field->offset, field->size);
2681
2682         if (cur_pid != pid || cur_func != val)
2683                 return NULL;
2684
2685         /* this is a leaf, now advance the iterator */
2686         return trace_read_data(cpu);
2687 }
2688
2689 /* Signal a overhead of time execution to the output */
2690 static void print_graph_overhead(unsigned long long duration)
2691 {
2692         /* Non nested entry or return */
2693         if (duration == ~0ULL)
2694                 return (void)printf("  ");
2695
2696         /* Duration exceeded 100 msecs */
2697         if (duration > 100000ULL)
2698                 return (void)printf("! ");
2699
2700         /* Duration exceeded 10 msecs */
2701         if (duration > 10000ULL)
2702                 return (void)printf("+ ");
2703
2704         printf("  ");
2705 }
2706
2707 static void print_graph_duration(unsigned long long duration)
2708 {
2709         unsigned long usecs = duration / 1000;
2710         unsigned long nsecs_rem = duration % 1000;
2711         /* log10(ULONG_MAX) + '\0' */
2712         char msecs_str[21];
2713         char nsecs_str[5];
2714         int len;
2715         int i;
2716
2717         sprintf(msecs_str, "%lu", usecs);
2718
2719         /* Print msecs */
2720         len = printf("%lu", usecs);
2721
2722         /* Print nsecs (we don't want to exceed 7 numbers) */
2723         if (len < 7) {
2724                 snprintf(nsecs_str, 8 - len, "%03lu", nsecs_rem);
2725                 len += printf(".%s", nsecs_str);
2726         }
2727
2728         printf(" us ");
2729
2730         /* Print remaining spaces to fit the row's width */
2731         for (i = len; i < 7; i++)
2732                 printf(" ");
2733
2734         printf("|  ");
2735 }
2736
2737 static void
2738 print_graph_entry_leaf(struct event *event, void *data, struct record *ret_rec)
2739 {
2740         unsigned long long rettime, calltime;
2741         unsigned long long duration, depth;
2742         unsigned long long val;
2743         struct format_field *field;
2744         struct func_map *func;
2745         struct event *ret_event;
2746         int type;
2747         int i;
2748
2749         type = trace_parse_common_type(ret_rec->data);
2750         ret_event = trace_find_event(type);
2751
2752         field = find_field(ret_event, "rettime");
2753         if (!field)
2754                 die("can't find rettime in return graph");
2755         rettime = read_size(ret_rec->data + field->offset, field->size);
2756
2757         field = find_field(ret_event, "calltime");
2758         if (!field)
2759                 die("can't find rettime in return graph");
2760         calltime = read_size(ret_rec->data + field->offset, field->size);
2761
2762         duration = rettime - calltime;
2763
2764         /* Overhead */
2765         print_graph_overhead(duration);
2766
2767         /* Duration */
2768         print_graph_duration(duration);
2769
2770         field = find_field(event, "depth");
2771         if (!field)
2772                 die("can't find depth in entry graph");
2773         depth = read_size(data + field->offset, field->size);
2774
2775         /* Function */
2776         for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
2777                 printf(" ");
2778
2779         field = find_field(event, "func");
2780         if (!field)
2781                 die("can't find func in entry graph");
2782         val = read_size(data + field->offset, field->size);
2783         func = find_func(val);
2784
2785         if (func)
2786                 printf("%s();", func->func);
2787         else
2788                 printf("%llx();", val);
2789 }
2790
2791 static void print_graph_nested(struct event *event, void *data)
2792 {
2793         struct format_field *field;
2794         unsigned long long depth;
2795         unsigned long long val;
2796         struct func_map *func;
2797         int i;
2798
2799         /* No overhead */
2800         print_graph_overhead(-1);
2801
2802         /* No time */
2803         printf("           |  ");
2804
2805         field = find_field(event, "depth");
2806         if (!field)
2807                 die("can't find depth in entry graph");
2808         depth = read_size(data + field->offset, field->size);
2809
2810         /* Function */
2811         for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
2812                 printf(" ");
2813
2814         field = find_field(event, "func");
2815         if (!field)
2816                 die("can't find func in entry graph");
2817         val = read_size(data + field->offset, field->size);
2818         func = find_func(val);
2819
2820         if (func)
2821                 printf("%s() {", func->func);
2822         else
2823                 printf("%llx() {", val);
2824 }
2825
2826 static void
2827 pretty_print_func_ent(void *data, int size, struct event *event,
2828                       int cpu, int pid)
2829 {
2830         struct format_field *field;
2831         struct record *rec;
2832         void *copy_data;
2833         unsigned long val;
2834
2835         if (latency_format) {
2836                 print_lat_fmt(data, size);
2837                 printf(" | ");
2838         }
2839
2840         field = find_field(event, "func");
2841         if (!field)
2842                 die("function entry does not have func field");
2843
2844         val = read_size(data + field->offset, field->size);
2845
2846         /*
2847          * peek_data may unmap the data pointer. Copy it first.
2848          */
2849         copy_data = malloc_or_die(size);
2850         memcpy(copy_data, data, size);
2851         data = copy_data;
2852
2853         rec = trace_peek_data(cpu);
2854         if (rec) {
2855                 rec = get_return_for_leaf(cpu, pid, val, rec);
2856                 if (rec) {
2857                         print_graph_entry_leaf(event, data, rec);
2858                         goto out_free;
2859                 }
2860         }
2861         print_graph_nested(event, data);
2862 out_free:
2863         free(data);
2864 }
2865
2866 static void
2867 pretty_print_func_ret(void *data, int size __unused, struct event *event)
2868 {
2869         unsigned long long rettime, calltime;
2870         unsigned long long duration, depth;
2871         struct format_field *field;
2872         int i;
2873
2874         if (latency_format) {
2875                 print_lat_fmt(data, size);
2876                 printf(" | ");
2877         }
2878
2879         field = find_field(event, "rettime");
2880         if (!field)
2881                 die("can't find rettime in return graph");
2882         rettime = read_size(data + field->offset, field->size);
2883
2884         field = find_field(event, "calltime");
2885         if (!field)
2886                 die("can't find calltime in return graph");
2887         calltime = read_size(data + field->offset, field->size);
2888
2889         duration = rettime - calltime;
2890
2891         /* Overhead */
2892         print_graph_overhead(duration);
2893
2894         /* Duration */
2895         print_graph_duration(duration);
2896
2897         field = find_field(event, "depth");
2898         if (!field)
2899                 die("can't find depth in entry graph");
2900         depth = read_size(data + field->offset, field->size);
2901
2902         /* Function */
2903         for (i = 0; i < (int)(depth * TRACE_GRAPH_INDENT); i++)
2904                 printf(" ");
2905
2906         printf("}");
2907 }
2908
2909 static void
2910 pretty_print_func_graph(void *data, int size, struct event *event,
2911                         int cpu, int pid)
2912 {
2913         if (event->flags & EVENT_FL_ISFUNCENT)
2914                 pretty_print_func_ent(data, size, event, cpu, pid);
2915         else if (event->flags & EVENT_FL_ISFUNCRET)
2916                 pretty_print_func_ret(data, size, event);
2917         printf("\n");
2918 }
2919
2920 void print_trace_event(int cpu, void *data, int size)
2921 {
2922         struct event *event;
2923         int type;
2924         int pid;
2925
2926         type = trace_parse_common_type(data);
2927
2928         event = trace_find_event(type);
2929         if (!event) {
2930                 warning("ug! no event found for type %d", type);
2931                 return;
2932         }
2933
2934         pid = trace_parse_common_pid(data);
2935
2936         if (event->flags & (EVENT_FL_ISFUNCENT | EVENT_FL_ISFUNCRET))
2937                 return pretty_print_func_graph(data, size, event, cpu, pid);
2938
2939         if (latency_format)
2940                 print_lat_fmt(data, size);
2941
2942         if (event->flags & EVENT_FL_FAILED) {
2943                 printf("EVENT '%s' FAILED TO PARSE\n",
2944                        event->name);
2945                 return;
2946         }
2947
2948         pretty_print(data, size, event);
2949 }
2950
2951 static void print_fields(struct print_flag_sym *field)
2952 {
2953         printf("{ %s, %s }", field->value, field->str);
2954         if (field->next) {
2955                 printf(", ");
2956                 print_fields(field->next);
2957         }
2958 }
2959
2960 static void print_args(struct print_arg *args)
2961 {
2962         int print_paren = 1;
2963
2964         switch (args->type) {
2965         case PRINT_NULL:
2966                 printf("null");
2967                 break;
2968         case PRINT_ATOM:
2969                 printf("%s", args->atom.atom);
2970                 break;
2971         case PRINT_FIELD:
2972                 printf("REC->%s", args->field.name);
2973                 break;
2974         case PRINT_FLAGS:
2975                 printf("__print_flags(");
2976                 print_args(args->flags.field);
2977                 printf(", %s, ", args->flags.delim);
2978                 print_fields(args->flags.flags);
2979                 printf(")");
2980                 break;
2981         case PRINT_SYMBOL:
2982                 printf("__print_symbolic(");
2983                 print_args(args->symbol.field);
2984                 printf(", ");
2985                 print_fields(args->symbol.symbols);
2986                 printf(")");
2987                 break;
2988         case PRINT_STRING:
2989                 printf("__get_str(%s)", args->string.string);
2990                 break;
2991         case PRINT_TYPE:
2992                 printf("(%s)", args->typecast.type);
2993                 print_args(args->typecast.item);
2994                 break;
2995         case PRINT_OP:
2996                 if (strcmp(args->op.op, ":") == 0)
2997                         print_paren = 0;
2998                 if (print_paren)
2999                         printf("(");
3000                 print_args(args->op.left);
3001                 printf(" %s ", args->op.op);
3002                 print_args(args->op.right);
3003                 if (print_paren)
3004                         printf(")");
3005                 break;
3006         default:
3007                 /* we should warn... */
3008                 return;
3009         }
3010         if (args->next) {
3011                 printf("\n");
3012                 print_args(args->next);
3013         }
3014 }
3015
3016 int parse_ftrace_file(char *buf, unsigned long size)
3017 {
3018         struct format_field *field;
3019         struct print_arg *arg, **list;
3020         struct event *event;
3021         int ret;
3022
3023         init_input_buf(buf, size);
3