tools/lib/traceevent/event-parse.h

   1 /*
   2  * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
   3  *
   4  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation;
   8  * version 2.1 of the License (not later!)
   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 Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this program; if not,  see <http://www.gnu.org/licenses>
  17  *
  18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19  */
  20 #ifndef _PARSE_EVENTS_H
  21 #define _PARSE_EVENTS_H
  22
  23 #include <stdbool.h>
  24 #include <stdarg.h>
  25 #include <stdio.h>
  26 #include <regex.h>
  27 #include <string.h>
  28
  29 #ifndef __maybe_unused
  30 #define __maybe_unused __attribute__((unused))
  31 #endif
  32
  33 /* ----------------------- trace_seq ----------------------- */
  34
  35
  36 #ifndef TRACE_SEQ_BUF_SIZE
  37 #define TRACE_SEQ_BUF_SIZE 4096
  38 #endif
  39
  40 #ifndef DEBUG_RECORD
  41 #define DEBUG_RECORD 0
  42 #endif
  43
  44 struct pevent_record {
  45         unsigned long long      ts;
  46         unsigned long long      offset;
  47         long long               missed_events;  /* buffer dropped events before */
  48         int                     record_size;    /* size of binary record */
  49         int                     size;           /* size of data */
  50         void                    *data;
  51         int                     cpu;
  52         int                     ref_count;
  53         int                     locked;         /* Do not free, even if ref_count is zero */
  54         void                    *priv;
  55 #if DEBUG_RECORD
  56         struct pevent_record    *prev;
  57         struct pevent_record    *next;
  58         long                    alloc_addr;
  59 #endif
  60 };
  61
  62 enum trace_seq_fail {
  63         TRACE_SEQ__GOOD,
  64         TRACE_SEQ__BUFFER_POISONED,
  65         TRACE_SEQ__MEM_ALLOC_FAILED,
  66 };
  67
  68 /*
  69  * Trace sequences are used to allow a function to call several other functions
  70  * to create a string of data to use (up to a max of PAGE_SIZE).
  71  */
  72
  73 struct trace_seq {
  74         char                    *buffer;
  75         unsigned int            buffer_size;
  76         unsigned int            len;
  77         unsigned int            readpos;
  78         enum trace_seq_fail     state;
  79 };
  80
  81 void trace_seq_init(struct trace_seq *s);
  82 void trace_seq_reset(struct trace_seq *s);
  83 void trace_seq_destroy(struct trace_seq *s);
  84
  85 extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
  86         __attribute__ ((format (printf, 2, 3)));
  87 extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args)
  88         __attribute__ ((format (printf, 2, 0)));
  89
  90 extern int trace_seq_puts(struct trace_seq *s, const char *str);
  91 extern int trace_seq_putc(struct trace_seq *s, unsigned char c);
  92
  93 extern void trace_seq_terminate(struct trace_seq *s);
  94
  95 extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp);
  96 extern int trace_seq_do_printf(struct trace_seq *s);
  97
  98
  99 /* ----------------------- pevent ----------------------- */
 100
 101 struct pevent;
 102 struct event_format;
 103
 104 typedef int (*pevent_event_handler_func)(struct trace_seq *s,
 105                                          struct pevent_record *record,
 106                                          struct event_format *event,
 107                                          void *context);
 108
 109 typedef int (*pevent_plugin_load_func)(struct pevent *pevent);
 110 typedef int (*pevent_plugin_unload_func)(struct pevent *pevent);
 111
 112 struct pevent_plugin_option {
 113         struct pevent_plugin_option     *next;
 114         void                            *handle;
 115         char                            *file;
 116         char                            *name;
 117         char                            *plugin_alias;
 118         char                            *description;
 119         const char                      *value;
 120         void                            *priv;
 121         int                             set;
 122 };
 123
 124 /*
 125  * Plugin hooks that can be called:
 126  *
 127  * PEVENT_PLUGIN_LOADER:  (required)
 128  *   The function name to initialized the plugin.
 129  *
 130  *   int PEVENT_PLUGIN_LOADER(struct pevent *pevent)
 131  *
 132  * PEVENT_PLUGIN_UNLOADER:  (optional)
 133  *   The function called just before unloading
 134  *
 135  *   int PEVENT_PLUGIN_UNLOADER(struct pevent *pevent)
 136  *
 137  * PEVENT_PLUGIN_OPTIONS:  (optional)
 138  *   Plugin options that can be set before loading
 139  *
 140  *   struct pevent_plugin_option PEVENT_PLUGIN_OPTIONS[] = {
 141  *      {
 142  *              .name = "option-name",
 143  *              .plugin_alias = "overide-file-name", (optional)
 144  *              .description = "description of option to show users",
 145  *      },
 146  *      {
 147  *              .name = NULL,
 148  *      },
 149  *   };
 150  *
 151  *   Array must end with .name = NULL;
 152  *
 153  *
 154  *   .plugin_alias is used to give a shorter name to access
 155  *   the vairable. Useful if a plugin handles more than one event.
 156  *
 157  *   If .value is not set, then it is considered a boolean and only
 158  *   .set will be processed. If .value is defined, then it is considered
 159  *   a string option and .set will be ignored.
 160  *
 161  * PEVENT_PLUGIN_ALIAS: (optional)
 162  *   The name to use for finding options (uses filename if not defined)
 163  */
 164 #define PEVENT_PLUGIN_LOADER pevent_plugin_loader
 165 #define PEVENT_PLUGIN_UNLOADER pevent_plugin_unloader
 166 #define PEVENT_PLUGIN_OPTIONS pevent_plugin_options
 167 #define PEVENT_PLUGIN_ALIAS pevent_plugin_alias
 168 #define _MAKE_STR(x)    #x
 169 #define MAKE_STR(x)     _MAKE_STR(x)
 170 #define PEVENT_PLUGIN_LOADER_NAME MAKE_STR(PEVENT_PLUGIN_LOADER)
 171 #define PEVENT_PLUGIN_UNLOADER_NAME MAKE_STR(PEVENT_PLUGIN_UNLOADER)
 172 #define PEVENT_PLUGIN_OPTIONS_NAME MAKE_STR(PEVENT_PLUGIN_OPTIONS)
 173 #define PEVENT_PLUGIN_ALIAS_NAME MAKE_STR(PEVENT_PLUGIN_ALIAS)
 174
 175 #define NSECS_PER_SEC           1000000000ULL
 176 #define NSECS_PER_USEC          1000ULL
 177
 178 enum format_flags {
 179         FIELD_IS_ARRAY          = 1,
 180         FIELD_IS_POINTER        = 2,
 181         FIELD_IS_SIGNED         = 4,
 182         FIELD_IS_STRING         = 8,
 183         FIELD_IS_DYNAMIC        = 16,
 184         FIELD_IS_LONG           = 32,
 185         FIELD_IS_FLAG           = 64,
 186         FIELD_IS_SYMBOLIC       = 128,
 187 };
 188
 189 struct format_field {
 190         struct format_field     *next;
 191         struct event_format     *event;
 192         char                    *type;
 193         char                    *name;
 194         char                    *alias;
 195         int                     offset;
 196         int                     size;
 197         unsigned int            arraylen;
 198         unsigned int            elementsize;
 199         unsigned long           flags;
 200 };
 201
 202 struct format {
 203         int                     nr_common;
 204         int                     nr_fields;
 205         struct format_field     *common_fields;
 206         struct format_field     *fields;
 207 };
 208
 209 struct print_arg_atom {
 210         char                    *atom;
 211 };
 212
 213 struct print_arg_string {
 214         char                    *string;
 215         int                     offset;
 216 };
 217
 218 struct print_arg_bitmask {
 219         char                    *bitmask;
 220         int                     offset;
 221 };
 222
 223 struct print_arg_field {
 224         char                    *name;
 225         struct format_field     *field;
 226 };
 227
 228 struct print_flag_sym {
 229         struct print_flag_sym   *next;
 230         char                    *value;
 231         char                    *str;
 232 };
 233
 234 struct print_arg_typecast {
 235         char                    *type;
 236         struct print_arg        *item;
 237 };
 238
 239 struct print_arg_flags {
 240         struct print_arg        *field;
 241         char                    *delim;
 242         struct print_flag_sym   *flags;
 243 };
 244
 245 struct print_arg_symbol {
 246         struct print_arg        *field;
 247         struct print_flag_sym   *symbols;
 248 };
 249
 250 struct print_arg_hex {
 251         struct print_arg        *field;
 252         struct print_arg        *size;
 253 };
 254
 255 struct print_arg_int_array {
 256         struct print_arg        *field;
 257         struct print_arg        *count;
 258         struct print_arg        *el_size;
 259 };
 260
 261 struct print_arg_dynarray {
 262         struct format_field     *field;
 263         struct print_arg        *index;
 264 };
 265
 266 struct print_arg;
 267
 268 struct print_arg_op {
 269         char                    *op;
 270         int                     prio;
 271         struct print_arg        *left;
 272         struct print_arg        *right;
 273 };
 274
 275 struct pevent_function_handler;
 276
 277 struct print_arg_func {
 278         struct pevent_function_handler  *func;
 279         struct print_arg                *args;
 280 };
 281
 282 enum print_arg_type {
 283         PRINT_NULL,
 284         PRINT_ATOM,
 285         PRINT_FIELD,
 286         PRINT_FLAGS,
 287         PRINT_SYMBOL,
 288         PRINT_HEX,
 289         PRINT_INT_ARRAY,
 290         PRINT_TYPE,
 291         PRINT_STRING,
 292         PRINT_BSTRING,
 293         PRINT_DYNAMIC_ARRAY,
 294         PRINT_OP,
 295         PRINT_FUNC,
 296         PRINT_BITMASK,
 297         PRINT_DYNAMIC_ARRAY_LEN,
 298 };
 299
 300 struct print_arg {
 301         struct print_arg                *next;
 302         enum print_arg_type             type;
 303         union {
 304                 struct print_arg_atom           atom;
 305                 struct print_arg_field          field;
 306                 struct print_arg_typecast       typecast;
 307                 struct print_arg_flags          flags;
 308                 struct print_arg_symbol         symbol;
 309                 struct print_arg_hex            hex;
 310                 struct print_arg_int_array      int_array;
 311                 struct print_arg_func           func;
 312                 struct print_arg_string         string;
 313                 struct print_arg_bitmask        bitmask;
 314                 struct print_arg_op             op;
 315                 struct print_arg_dynarray       dynarray;
 316         };
 317 };
 318
 319 struct print_fmt {
 320         char                    *format;
 321         struct print_arg        *args;
 322 };
 323
 324 struct event_format {
 325         struct pevent           *pevent;
 326         char                    *name;
 327         int                     id;
 328         int                     flags;
 329         struct format           format;
 330         struct print_fmt        print_fmt;
 331         char                    *system;
 332         pevent_event_handler_func handler;
 333         void                    *context;
 334 };
 335
 336 enum {
 337         EVENT_FL_ISFTRACE       = 0x01,
 338         EVENT_FL_ISPRINT        = 0x02,
 339         EVENT_FL_ISBPRINT       = 0x04,
 340         EVENT_FL_ISFUNCENT      = 0x10,
 341         EVENT_FL_ISFUNCRET      = 0x20,
 342         EVENT_FL_NOHANDLE       = 0x40,
 343         EVENT_FL_PRINTRAW       = 0x80,
 344
 345         EVENT_FL_FAILED         = 0x80000000
 346 };
 347
 348 enum event_sort_type {
 349         EVENT_SORT_ID,
 350         EVENT_SORT_NAME,
 351         EVENT_SORT_SYSTEM,
 352 };
 353
 354 enum event_type {
 355         EVENT_ERROR,
 356         EVENT_NONE,
 357         EVENT_SPACE,
 358         EVENT_NEWLINE,
 359         EVENT_OP,
 360         EVENT_DELIM,
 361         EVENT_ITEM,
 362         EVENT_DQUOTE,
 363         EVENT_SQUOTE,
 364 };
 365
 366 typedef unsigned long long (*pevent_func_handler)(struct trace_seq *s,
 367                                              unsigned long long *args);
 368
 369 enum pevent_func_arg_type {
 370         PEVENT_FUNC_ARG_VOID,
 371         PEVENT_FUNC_ARG_INT,
 372         PEVENT_FUNC_ARG_LONG,
 373         PEVENT_FUNC_ARG_STRING,
 374         PEVENT_FUNC_ARG_PTR,
 375         PEVENT_FUNC_ARG_MAX_TYPES
 376 };
 377
 378 enum pevent_flag {
 379         PEVENT_NSEC_OUTPUT              = 1,    /* output in NSECS */
 380         PEVENT_DISABLE_SYS_PLUGINS      = 1 << 1,
 381         PEVENT_DISABLE_PLUGINS          = 1 << 2,
 382 };
 383
 384 #define PEVENT_ERRORS                                                         \
 385         _PE(MEM_ALLOC_FAILED,   "failed to allocate memory"),                 \
 386         _PE(PARSE_EVENT_FAILED, "failed to parse event"),                     \
 387         _PE(READ_ID_FAILED,     "failed to read event id"),                   \
 388         _PE(READ_FORMAT_FAILED, "failed to read event format"),               \
 389         _PE(READ_PRINT_FAILED,  "failed to read event print fmt"),            \
 390         _PE(OLD_FTRACE_ARG_FAILED,"failed to allocate field name for ftrace"),\
 391         _PE(INVALID_ARG_TYPE,   "invalid argument type"),                     \
 392         _PE(INVALID_EXP_TYPE,   "invalid expression type"),                   \
 393         _PE(INVALID_OP_TYPE,    "invalid operator type"),                     \
 394         _PE(INVALID_EVENT_NAME, "invalid event name"),                        \
 395         _PE(EVENT_NOT_FOUND,    "no event found"),                            \
 396         _PE(SYNTAX_ERROR,       "syntax error"),                              \
 397         _PE(ILLEGAL_RVALUE,     "illegal rvalue"),                            \
 398         _PE(ILLEGAL_LVALUE,     "illegal lvalue for string comparison"),      \
 399         _PE(INVALID_REGEX,      "regex did not compute"),                     \
 400         _PE(ILLEGAL_STRING_CMP, "illegal comparison for string"),             \
 401         _PE(ILLEGAL_INTEGER_CMP,"illegal comparison for integer"),            \
 402         _PE(REPARENT_NOT_OP,    "cannot reparent other than OP"),             \
 403         _PE(REPARENT_FAILED,    "failed to reparent filter OP"),              \
 404         _PE(BAD_FILTER_ARG,     "bad arg in filter tree"),                    \
 405         _PE(UNEXPECTED_TYPE,    "unexpected type (not a value)"),             \
 406         _PE(ILLEGAL_TOKEN,      "illegal token"),                             \
 407         _PE(INVALID_PAREN,      "open parenthesis cannot come here"),         \
 408         _PE(UNBALANCED_PAREN,   "unbalanced number of parenthesis"),          \
 409         _PE(UNKNOWN_TOKEN,      "unknown token"),                             \
 410         _PE(FILTER_NOT_FOUND,   "no filter found"),                           \
 411         _PE(NOT_A_NUMBER,       "must have number field"),                    \
 412         _PE(NO_FILTER,          "no filters exists"),                         \
 413         _PE(FILTER_MISS,        "record does not match to filter")
 414
 415 #undef _PE
 416 #define _PE(__code, __str) PEVENT_ERRNO__ ## __code
 417 enum pevent_errno {
 418         PEVENT_ERRNO__SUCCESS                   = 0,
 419         PEVENT_ERRNO__FILTER_MATCH              = PEVENT_ERRNO__SUCCESS,
 420
 421         /*
 422          * Choose an arbitrary negative big number not to clash with standard
 423          * errno since SUS requires the errno has distinct positive values.
 424          * See 'Issue 6' in the link below.
 425          *
 426          * http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/errno.h.html
 427          */
 428         __PEVENT_ERRNO__START                   = -100000,
 429
 430         PEVENT_ERRORS,
 431
 432         __PEVENT_ERRNO__END,
 433 };
 434 #undef _PE
 435
 436 struct plugin_list;
 437
 438 #define INVALID_PLUGIN_LIST_OPTION      ((char **)((unsigned long)-1))
 439
 440 struct plugin_list *traceevent_load_plugins(struct pevent *pevent);
 441 void traceevent_unload_plugins(struct plugin_list *plugin_list,
 442                                struct pevent *pevent);
 443 char **traceevent_plugin_list_options(void);
 444 void traceevent_plugin_free_options_list(char **list);
 445 int traceevent_plugin_add_options(const char *name,
 446                                   struct pevent_plugin_option *options);
 447 void traceevent_plugin_remove_options(struct pevent_plugin_option *options);
 448 void traceevent_print_plugins(struct trace_seq *s,
 449                               const char *prefix, const char *suffix,
 450                               const struct plugin_list *list);
 451
 452 struct cmdline;
 453 struct cmdline_list;
 454 struct func_map;
 455 struct func_list;
 456 struct event_handler;
 457 struct func_resolver;
 458
 459 typedef char *(pevent_func_resolver_t)(void *priv,
 460                                        unsigned long long *addrp, char **modp);
 461
 462 struct pevent {
 463         int ref_count;
 464
 465         int header_page_ts_offset;
 466         int header_page_ts_size;
 467         int header_page_size_offset;
 468         int header_page_size_size;
 469         int header_page_data_offset;
 470         int header_page_data_size;
 471         int header_page_overwrite;
 472
 473         int file_bigendian;
 474         int host_bigendian;
 475
 476         int latency_format;
 477
 478         int old_format;
 479
 480         int cpus;
 481         int long_size;
 482         int page_size;
 483
 484         struct cmdline *cmdlines;
 485         struct cmdline_list *cmdlist;
 486         int cmdline_count;
 487
 488         struct func_map *func_map;
 489         struct func_resolver *func_resolver;
 490         struct func_list *funclist;
 491         unsigned int func_count;
 492
 493         struct printk_map *printk_map;
 494         struct printk_list *printklist;
 495         unsigned int printk_count;
 496
 497
 498         struct event_format **events;
 499         int nr_events;
 500         struct event_format **sort_events;
 501         enum event_sort_type last_type;
 502
 503         int type_offset;
 504         int type_size;
 505
 506         int pid_offset;
 507         int pid_size;
 508
 509         int pc_offset;
 510         int pc_size;
 511
 512         int flags_offset;
 513         int flags_size;
 514
 515         int ld_offset;
 516         int ld_size;
 517
 518         int print_raw;
 519
 520         int test_filters;
 521
 522         int flags;
 523
 524         struct format_field *bprint_ip_field;
 525         struct format_field *bprint_fmt_field;
 526         struct format_field *bprint_buf_field;
 527
 528         struct event_handler *handlers;
 529         struct pevent_function_handler *func_handlers;
 530
 531         /* cache */
 532         struct event_format *last_event;
 533
 534         char *trace_clock;
 535 };
 536
 537 static inline void pevent_set_flag(struct pevent *pevent, int flag)
 538 {
 539         pevent->flags |= flag;
 540 }
 541
 542 static inline unsigned short
 543 __data2host2(struct pevent *pevent, unsigned short data)
 544 {
 545         unsigned short swap;
 546
 547         if (pevent->host_bigendian == pevent->file_bigendian)
 548                 return data;
 549
 550         swap = ((data & 0xffULL) << 8) |
 551                 ((data & (0xffULL << 8)) >> 8);
 552
 553         return swap;
 554 }
 555
 556 static inline unsigned int
 557 __data2host4(struct pevent *pevent, unsigned int data)
 558 {
 559         unsigned int swap;
 560
 561         if (pevent->host_bigendian == pevent->file_bigendian)
 562                 return data;
 563
 564         swap = ((data & 0xffULL) << 24) |
 565                 ((data & (0xffULL << 8)) << 8) |
 566                 ((data & (0xffULL << 16)) >> 8) |
 567                 ((data & (0xffULL << 24)) >> 24);
 568
 569         return swap;
 570 }
 571
 572 static inline unsigned long long
 573 __data2host8(struct pevent *pevent, unsigned long long data)
 574 {
 575         unsigned long long swap;
 576
 577         if (pevent->host_bigendian == pevent->file_bigendian)
 578                 return data;
 579
 580         swap = ((data & 0xffULL) << 56) |
 581                 ((data & (0xffULL << 8)) << 40) |
 582                 ((data & (0xffULL << 16)) << 24) |
 583                 ((data & (0xffULL << 24)) << 8) |
 584                 ((data & (0xffULL << 32)) >> 8) |
 585                 ((data & (0xffULL << 40)) >> 24) |
 586                 ((data & (0xffULL << 48)) >> 40) |
 587                 ((data & (0xffULL << 56)) >> 56);
 588
 589         return swap;
 590 }
 591
 592 #define data2host2(pevent, ptr)         __data2host2(pevent, *(unsigned short *)(ptr))
 593 #define data2host4(pevent, ptr)         __data2host4(pevent, *(unsigned int *)(ptr))
 594 #define data2host8(pevent, ptr)                                 \
 595 ({                                                              \
 596         unsigned long long __val;                               \
 597                                                                 \
 598         memcpy(&__val, (ptr), sizeof(unsigned long long));      \
 599         __data2host8(pevent, __val);                            \
 600 })
 601
 602 static inline int traceevent_host_bigendian(void)
 603 {
 604         unsigned char str[] = { 0x1, 0x2, 0x3, 0x4 };
 605         unsigned int val;
 606
 607         memcpy(&val, str, 4);
 608         return val == 0x01020304;
 609 }
 610
 611 /* taken from kernel/trace/trace.h */
 612 enum trace_flag_type {
 613         TRACE_FLAG_IRQS_OFF             = 0x01,
 614         TRACE_FLAG_IRQS_NOSUPPORT       = 0x02,
 615         TRACE_FLAG_NEED_RESCHED         = 0x04,
 616         TRACE_FLAG_HARDIRQ              = 0x08,
 617         TRACE_FLAG_SOFTIRQ              = 0x10,
 618 };
 619
 620 int pevent_set_function_resolver(struct pevent *pevent,
 621                                  pevent_func_resolver_t *func, void *priv);
 622 void pevent_reset_function_resolver(struct pevent *pevent);
 623 int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
 624 int pevent_register_trace_clock(struct pevent *pevent, const char *trace_clock);
 625 int pevent_register_function(struct pevent *pevent, char *name,
 626                              unsigned long long addr, char *mod);
 627 int pevent_register_print_string(struct pevent *pevent, const char *fmt,
 628                                  unsigned long long addr);
 629 int pevent_pid_is_registered(struct pevent *pevent, int pid);
 630
 631 void pevent_print_event_task(struct pevent *pevent, struct trace_seq *s,
 632                              struct event_format *event,
 633                              struct pevent_record *record);
 634 void pevent_print_event_time(struct pevent *pevent, struct trace_seq *s,
 635                              struct event_format *event,
 636                              struct pevent_record *record,
 637                              bool use_trace_clock);
 638 void pevent_print_event_data(struct pevent *pevent, struct trace_seq *s,
 639                              struct event_format *event,
 640                              struct pevent_record *record);
 641 void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
 642                         struct pevent_record *record, bool use_trace_clock);
 643
 644 int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
 645                              int long_size);
 646
 647 enum pevent_errno pevent_parse_event(struct pevent *pevent, const char *buf,
 648                                      unsigned long size, const char *sys);
 649 enum pevent_errno pevent_parse_format(struct pevent *pevent,
 650                                       struct event_format **eventp,
 651                                       const char *buf,
 652                                       unsigned long size, const char *sys);
 653 void pevent_free_format(struct event_format *event);
 654 void pevent_free_format_field(struct format_field *field);
 655
 656 void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
 657                            const char *name, struct pevent_record *record,
 658                            int *len, int err);
 659
 660 int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
 661                          const char *name, struct pevent_record *record,
 662                          unsigned long long *val, int err);
 663 int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
 664                                 const char *name, struct pevent_record *record,
 665                                 unsigned long long *val, int err);
 666 int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
 667                              const char *name, struct pevent_record *record,
 668                              unsigned long long *val, int err);
 669
 670 int pevent_print_num_field(struct trace_seq *s, const char *fmt,
 671                            struct event_format *event, const char *name,
 672                            struct pevent_record *record, int err);
 673
 674 int pevent_print_func_field(struct trace_seq *s, const char *fmt,
 675                            struct event_format *event, const char *name,
 676                            struct pevent_record *record, int err);
 677
 678 int pevent_register_event_handler(struct pevent *pevent, int id,
 679                                   const char *sys_name, const char *event_name,
 680                                   pevent_event_handler_func func, void *context);
 681 int pevent_unregister_event_handler(struct pevent *pevent, int id,
 682                                     const char *sys_name, const char *event_name,
 683                                     pevent_event_handler_func func, void *context);
 684 int pevent_register_print_function(struct pevent *pevent,
 685                                    pevent_func_handler func,
 686                                    enum pevent_func_arg_type ret_type,
 687                                    char *name, ...);
 688 int pevent_unregister_print_function(struct pevent *pevent,
 689                                      pevent_func_handler func, char *name);
 690
 691 struct format_field *pevent_find_common_field(struct event_format *event, const char *name);
 692 struct format_field *pevent_find_field(struct event_format *event, const char *name);
 693 struct format_field *pevent_find_any_field(struct event_format *event, const char *name);
 694
 695 const char *pevent_find_function(struct pevent *pevent, unsigned long long addr);
 696 unsigned long long
 697 pevent_find_function_address(struct pevent *pevent, unsigned long long addr);
 698 unsigned long long pevent_read_number(struct pevent *pevent, const void *ptr, int size);
 699 int pevent_read_number_field(struct format_field *field, const void *data,
 700                              unsigned long long *value);
 701
 702 struct event_format *pevent_find_event(struct pevent *pevent, int id);
 703
 704 struct event_format *
 705 pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *name);
 706
 707 struct event_format *
 708 pevent_find_event_by_record(struct pevent *pevent, struct pevent_record *record);
 709
 710 void pevent_data_lat_fmt(struct pevent *pevent,
 711                          struct trace_seq *s, struct pevent_record *record);
 712 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
 713 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
 714 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
 715 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
 716 struct cmdline;
 717 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,
 718                                           struct cmdline *next);
 719 int pevent_cmdline_pid(struct pevent *pevent, struct cmdline *cmdline);
 720
 721 void pevent_print_field(struct trace_seq *s, void *data,
 722                         struct format_field *field);
 723 void pevent_print_fields(struct trace_seq *s, void *data,
 724                          int size __maybe_unused, struct event_format *event);
 725 void pevent_event_info(struct trace_seq *s, struct event_format *event,
 726                        struct pevent_record *record);
 727 int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
 728                     char *buf, size_t buflen);
 729
 730 struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
 731 struct format_field **pevent_event_common_fields(struct event_format *event);
 732 struct format_field **pevent_event_fields(struct event_format *event);
 733
 734 static inline int pevent_get_cpus(struct pevent *pevent)
 735 {
 736         return pevent->cpus;
 737 }
 738
 739 static inline void pevent_set_cpus(struct pevent *pevent, int cpus)
 740 {
 741         pevent->cpus = cpus;
 742 }
 743
 744 static inline int pevent_get_long_size(struct pevent *pevent)
 745 {
 746         return pevent->long_size;
 747 }
 748
 749 static inline void pevent_set_long_size(struct pevent *pevent, int long_size)
 750 {
 751         pevent->long_size = long_size;
 752 }
 753
 754 static inline int pevent_get_page_size(struct pevent *pevent)
 755 {
 756         return pevent->page_size;
 757 }
 758
 759 static inline void pevent_set_page_size(struct pevent *pevent, int _page_size)
 760 {
 761         pevent->page_size = _page_size;
 762 }
 763
 764 static inline int pevent_is_file_bigendian(struct pevent *pevent)
 765 {
 766         return pevent->file_bigendian;
 767 }
 768
 769 static inline void pevent_set_file_bigendian(struct pevent *pevent, int endian)
 770 {
 771         pevent->file_bigendian = endian;
 772 }
 773
 774 static inline int pevent_is_host_bigendian(struct pevent *pevent)
 775 {
 776         return pevent->host_bigendian;
 777 }
 778
 779 static inline void pevent_set_host_bigendian(struct pevent *pevent, int endian)
 780 {
 781         pevent->host_bigendian = endian;
 782 }
 783
 784 static inline int pevent_is_latency_format(struct pevent *pevent)
 785 {
 786         return pevent->latency_format;
 787 }
 788
 789 static inline void pevent_set_latency_format(struct pevent *pevent, int lat)
 790 {
 791         pevent->latency_format = lat;
 792 }
 793
 794 struct pevent *pevent_alloc(void);
 795 void pevent_free(struct pevent *pevent);
 796 void pevent_ref(struct pevent *pevent);
 797 void pevent_unref(struct pevent *pevent);
 798
 799 /* access to the internal parser */
 800 void pevent_buffer_init(const char *buf, unsigned long long size);
 801 enum event_type pevent_read_token(char **tok);
 802 void pevent_free_token(char *token);
 803 int pevent_peek_char(void);
 804 const char *pevent_get_input_buf(void);
 805 unsigned long long pevent_get_input_buf_ptr(void);
 806
 807 /* for debugging */
 808 void pevent_print_funcs(struct pevent *pevent);
 809 void pevent_print_printk(struct pevent *pevent);
 810
 811 /* ----------------------- filtering ----------------------- */
 812
 813 enum filter_boolean_type {
 814         FILTER_FALSE,
 815         FILTER_TRUE,
 816 };
 817
 818 enum filter_op_type {
 819         FILTER_OP_AND = 1,
 820         FILTER_OP_OR,
 821         FILTER_OP_NOT,
 822 };
 823
 824 enum filter_cmp_type {
 825         FILTER_CMP_NONE,
 826         FILTER_CMP_EQ,
 827         FILTER_CMP_NE,
 828         FILTER_CMP_GT,
 829         FILTER_CMP_LT,
 830         FILTER_CMP_GE,
 831         FILTER_CMP_LE,
 832         FILTER_CMP_MATCH,
 833         FILTER_CMP_NOT_MATCH,
 834         FILTER_CMP_REGEX,
 835         FILTER_CMP_NOT_REGEX,
 836 };
 837
 838 enum filter_exp_type {
 839         FILTER_EXP_NONE,
 840         FILTER_EXP_ADD,
 841         FILTER_EXP_SUB,
 842         FILTER_EXP_MUL,
 843         FILTER_EXP_DIV,
 844         FILTER_EXP_MOD,
 845         FILTER_EXP_RSHIFT,
 846         FILTER_EXP_LSHIFT,
 847         FILTER_EXP_AND,
 848         FILTER_EXP_OR,
 849         FILTER_EXP_XOR,
 850         FILTER_EXP_NOT,
 851 };
 852
 853 enum filter_arg_type {
 854         FILTER_ARG_NONE,
 855         FILTER_ARG_BOOLEAN,
 856         FILTER_ARG_VALUE,
 857         FILTER_ARG_FIELD,
 858         FILTER_ARG_EXP,
 859         FILTER_ARG_OP,
 860         FILTER_ARG_NUM,
 861         FILTER_ARG_STR,
 862 };
 863
 864 enum filter_value_type {
 865         FILTER_NUMBER,
 866         FILTER_STRING,
 867         FILTER_CHAR
 868 };
 869
 870 struct fliter_arg;
 871
 872 struct filter_arg_boolean {
 873         enum filter_boolean_type        value;
 874 };
 875
 876 struct filter_arg_field {
 877         struct format_field     *field;
 878 };
 879
 880 struct filter_arg_value {
 881         enum filter_value_type  type;
 882         union {
 883                 char                    *str;
 884                 unsigned long long      val;
 885         };
 886 };
 887
 888 struct filter_arg_op {
 889         enum filter_op_type     type;
 890         struct filter_arg       *left;
 891         struct filter_arg       *right;
 892 };
 893
 894 struct filter_arg_exp {
 895         enum filter_exp_type    type;
 896         struct filter_arg       *left;
 897         struct filter_arg       *right;
 898 };
 899
 900 struct filter_arg_num {
 901         enum filter_cmp_type    type;
 902         struct filter_arg       *left;
 903         struct filter_arg       *right;
 904 };
 905
 906 struct filter_arg_str {
 907         enum filter_cmp_type    type;
 908         struct format_field     *field;
 909         char                    *val;
 910         char                    *buffer;
 911         regex_t                 reg;
 912 };
 913
 914 struct filter_arg {
 915         enum filter_arg_type    type;
 916         union {
 917                 struct filter_arg_boolean       boolean;
 918                 struct filter_arg_field         field;
 919                 struct filter_arg_value         value;
 920                 struct filter_arg_op            op;
 921                 struct filter_arg_exp           exp;
 922                 struct filter_arg_num           num;
 923                 struct filter_arg_str           str;
 924         };
 925 };
 926
 927 struct filter_type {
 928         int                     event_id;
 929         struct event_format     *event;
 930         struct filter_arg       *filter;
 931 };
 932
 933 #define PEVENT_FILTER_ERROR_BUFSZ  1024
 934
 935 struct event_filter {
 936         struct pevent           *pevent;
 937         int                     filters;
 938         struct filter_type      *event_filters;
 939         char                    error_buffer[PEVENT_FILTER_ERROR_BUFSZ];
 940 };
 941
 942 struct event_filter *pevent_filter_alloc(struct pevent *pevent);
 943
 944 /* for backward compatibility */
 945 #define FILTER_NONE             PEVENT_ERRNO__NO_FILTER
 946 #define FILTER_NOEXIST          PEVENT_ERRNO__FILTER_NOT_FOUND
 947 #define FILTER_MISS             PEVENT_ERRNO__FILTER_MISS
 948 #define FILTER_MATCH            PEVENT_ERRNO__FILTER_MATCH
 949
 950 enum filter_trivial_type {
 951         FILTER_TRIVIAL_FALSE,
 952         FILTER_TRIVIAL_TRUE,
 953         FILTER_TRIVIAL_BOTH,
 954 };
 955
 956 enum pevent_errno pevent_filter_add_filter_str(struct event_filter *filter,
 957                                                const char *filter_str);
 958
 959 enum pevent_errno pevent_filter_match(struct event_filter *filter,
 960                                       struct pevent_record *record);
 961
 962 int pevent_filter_strerror(struct event_filter *filter, enum pevent_errno err,
 963                            char *buf, size_t buflen);
 964
 965 int pevent_event_filtered(struct event_filter *filter,
 966                           int event_id);
 967
 968 void pevent_filter_reset(struct event_filter *filter);
 969
 970 int pevent_filter_clear_trivial(struct event_filter *filter,
 971                                  enum filter_trivial_type type);
 972
 973 void pevent_filter_free(struct event_filter *filter);
 974
 975 char *pevent_filter_make_string(struct event_filter *filter, int event_id);
 976
 977 int pevent_filter_remove_event(struct event_filter *filter,
 978                                int event_id);
 979
 980 int pevent_filter_event_has_trivial(struct event_filter *filter,
 981                                     int event_id,
 982                                     enum filter_trivial_type type);
 983
 984 int pevent_filter_copy(struct event_filter *dest, struct event_filter *source);
 985
 986 int pevent_update_trivial(struct event_filter *dest, struct event_filter *source,
 987                           enum filter_trivial_type type);
 988
 989 int pevent_filter_compare(struct event_filter *filter1, struct event_filter *filter2);
 990
 991 #endif /* _PARSE_EVENTS_H */