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