tools/perf/util/auxtrace.h

   1 /*
   2  * auxtrace.h: AUX area trace support
   3  * Copyright (c) 2013-2015, Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  */
  15
  16 #ifndef __PERF_AUXTRACE_H
  17 #define __PERF_AUXTRACE_H
  18
  19 #include <sys/types.h>
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include <linux/list.h>
  23 #include <linux/perf_event.h>
  24 #include <linux/types.h>
  25
  26 #include "../perf.h"
  27 #include "event.h"
  28 #include "session.h"
  29 #include "debug.h"
  30
  31 union perf_event;
  32 struct perf_session;
  33 struct perf_evlist;
  34 struct perf_tool;
  35 struct option;
  36 struct record_opts;
  37 struct auxtrace_info_event;
  38 struct events_stats;
  39
  40 enum auxtrace_type {
  41         PERF_AUXTRACE_UNKNOWN,
  42 };
  43
  44 enum itrace_period_type {
  45         PERF_ITRACE_PERIOD_INSTRUCTIONS,
  46         PERF_ITRACE_PERIOD_TICKS,
  47         PERF_ITRACE_PERIOD_NANOSECS,
  48 };
  49
  50 /**
  51  * struct itrace_synth_opts - AUX area tracing synthesis options.
  52  * @set: indicates whether or not options have been set
  53  * @inject: indicates the event (not just the sample) must be fully synthesized
  54  *          because 'perf inject' will write it out
  55  * @instructions: whether to synthesize 'instructions' events
  56  * @branches: whether to synthesize 'branches' events
  57  * @transactions: whether to synthesize events for transactions
  58  * @errors: whether to synthesize decoder error events
  59  * @dont_decode: whether to skip decoding entirely
  60  * @log: write a decoding log
  61  * @calls: limit branch samples to calls (can be combined with @returns)
  62  * @returns: limit branch samples to returns (can be combined with @calls)
  63  * @callchain: add callchain to 'instructions' events
  64  * @callchain_sz: maximum callchain size
  65  * @period: 'instructions' events period
  66  * @period_type: 'instructions' events period type
  67  */
  68 struct itrace_synth_opts {
  69         bool                    set;
  70         bool                    inject;
  71         bool                    instructions;
  72         bool                    branches;
  73         bool                    transactions;
  74         bool                    errors;
  75         bool                    dont_decode;
  76         bool                    log;
  77         bool                    calls;
  78         bool                    returns;
  79         bool                    callchain;
  80         unsigned int            callchain_sz;
  81         unsigned long long      period;
  82         enum itrace_period_type period_type;
  83 };
  84
  85 /**
  86  * struct auxtrace_index_entry - indexes a AUX area tracing event within a
  87  *                               perf.data file.
  88  * @file_offset: offset within the perf.data file
  89  * @sz: size of the event
  90  */
  91 struct auxtrace_index_entry {
  92         u64                     file_offset;
  93         u64                     sz;
  94 };
  95
  96 #define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
  97
  98 /**
  99  * struct auxtrace_index - index of AUX area tracing events within a perf.data
 100  *                         file.
 101  * @list: linking a number of arrays of entries
 102  * @nr: number of entries
 103  * @entries: array of entries
 104  */
 105 struct auxtrace_index {
 106         struct list_head        list;
 107         size_t                  nr;
 108         struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
 109 };
 110
 111 /**
 112  * struct auxtrace - session callbacks to allow AUX area data decoding.
 113  * @process_event: lets the decoder see all session events
 114  * @flush_events: process any remaining data
 115  * @free_events: free resources associated with event processing
 116  * @free: free resources associated with the session
 117  */
 118 struct auxtrace {
 119         int (*process_event)(struct perf_session *session,
 120                              union perf_event *event,
 121                              struct perf_sample *sample,
 122                              struct perf_tool *tool);
 123         int (*process_auxtrace_event)(struct perf_session *session,
 124                                       union perf_event *event,
 125                                       struct perf_tool *tool);
 126         int (*flush_events)(struct perf_session *session,
 127                             struct perf_tool *tool);
 128         void (*free_events)(struct perf_session *session);
 129         void (*free)(struct perf_session *session);
 130 };
 131
 132 /**
 133  * struct auxtrace_buffer - a buffer containing AUX area tracing data.
 134  * @list: buffers are queued in a list held by struct auxtrace_queue
 135  * @size: size of the buffer in bytes
 136  * @pid: in per-thread mode, the pid this buffer is associated with
 137  * @tid: in per-thread mode, the tid this buffer is associated with
 138  * @cpu: in per-cpu mode, the cpu this buffer is associated with
 139  * @data: actual buffer data (can be null if the data has not been loaded)
 140  * @data_offset: file offset at which the buffer can be read
 141  * @mmap_addr: mmap address at which the buffer can be read
 142  * @mmap_size: size of the mmap at @mmap_addr
 143  * @data_needs_freeing: @data was malloc'd so free it when it is no longer
 144  *                      needed
 145  * @consecutive: the original data was split up and this buffer is consecutive
 146  *               to the previous buffer
 147  * @offset: offset as determined by aux_head / aux_tail members of struct
 148  *          perf_event_mmap_page
 149  * @reference: an implementation-specific reference determined when the data is
 150  *             recorded
 151  * @buffer_nr: used to number each buffer
 152  * @use_size: implementation actually only uses this number of bytes
 153  * @use_data: implementation actually only uses data starting at this address
 154  */
 155 struct auxtrace_buffer {
 156         struct list_head        list;
 157         size_t                  size;
 158         pid_t                   pid;
 159         pid_t                   tid;
 160         int                     cpu;
 161         void                    *data;
 162         off_t                   data_offset;
 163         void                    *mmap_addr;
 164         size_t                  mmap_size;
 165         bool                    data_needs_freeing;
 166         bool                    consecutive;
 167         u64                     offset;
 168         u64                     reference;
 169         u64                     buffer_nr;
 170         size_t                  use_size;
 171         void                    *use_data;
 172 };
 173
 174 /**
 175  * struct auxtrace_queue - a queue of AUX area tracing data buffers.
 176  * @head: head of buffer list
 177  * @tid: in per-thread mode, the tid this queue is associated with
 178  * @cpu: in per-cpu mode, the cpu this queue is associated with
 179  * @set: %true once this queue has been dedicated to a specific thread or cpu
 180  * @priv: implementation-specific data
 181  */
 182 struct auxtrace_queue {
 183         struct list_head        head;
 184         pid_t                   tid;
 185         int                     cpu;
 186         bool                    set;
 187         void                    *priv;
 188 };
 189
 190 /**
 191  * struct auxtrace_queues - an array of AUX area tracing queues.
 192  * @queue_array: array of queues
 193  * @nr_queues: number of queues
 194  * @new_data: set whenever new data is queued
 195  * @populated: queues have been fully populated using the auxtrace_index
 196  * @next_buffer_nr: used to number each buffer
 197  */
 198 struct auxtrace_queues {
 199         struct auxtrace_queue   *queue_array;
 200         unsigned int            nr_queues;
 201         bool                    new_data;
 202         bool                    populated;
 203         u64                     next_buffer_nr;
 204 };
 205
 206 /**
 207  * struct auxtrace_heap_item - element of struct auxtrace_heap.
 208  * @queue_nr: queue number
 209  * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
 210  *           to be a timestamp
 211  */
 212 struct auxtrace_heap_item {
 213         unsigned int            queue_nr;
 214         u64                     ordinal;
 215 };
 216
 217 /**
 218  * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
 219  * @heap_array: the heap
 220  * @heap_cnt: the number of elements in the heap
 221  * @heap_sz: maximum number of elements (grows as needed)
 222  */
 223 struct auxtrace_heap {
 224         struct auxtrace_heap_item       *heap_array;
 225         unsigned int            heap_cnt;
 226         unsigned int            heap_sz;
 227 };
 228
 229 /**
 230  * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
 231  * @base: address of mapped area
 232  * @userpg: pointer to buffer's perf_event_mmap_page
 233  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 234  * @len: size of mapped area
 235  * @prev: previous aux_head
 236  * @idx: index of this mmap
 237  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 238  *       mmap) otherwise %0
 239  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 240  */
 241 struct auxtrace_mmap {
 242         void            *base;
 243         void            *userpg;
 244         size_t          mask;
 245         size_t          len;
 246         u64             prev;
 247         int             idx;
 248         pid_t           tid;
 249         int             cpu;
 250 };
 251
 252 /**
 253  * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
 254  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 255  * @offset: file offset of mapped area
 256  * @len: size of mapped area
 257  * @prot: mmap memory protection
 258  * @idx: index of this mmap
 259  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 260  *       mmap) otherwise %0
 261  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 262  */
 263 struct auxtrace_mmap_params {
 264         size_t          mask;
 265         off_t           offset;
 266         size_t          len;
 267         int             prot;
 268         int             idx;
 269         pid_t           tid;
 270         int             cpu;
 271 };
 272
 273 /**
 274  * struct auxtrace_record - callbacks for recording AUX area data.
 275  * @recording_options: validate and process recording options
 276  * @info_priv_size: return the size of the private data in auxtrace_info_event
 277  * @info_fill: fill-in the private data in auxtrace_info_event
 278  * @free: free this auxtrace record structure
 279  * @snapshot_start: starting a snapshot
 280  * @snapshot_finish: finishing a snapshot
 281  * @find_snapshot: find data to snapshot within auxtrace mmap
 282  * @parse_snapshot_options: parse snapshot options
 283  * @reference: provide a 64-bit reference number for auxtrace_event
 284  * @read_finish: called after reading from an auxtrace mmap
 285  */
 286 struct auxtrace_record {
 287         int (*recording_options)(struct auxtrace_record *itr,
 288                                  struct perf_evlist *evlist,
 289                                  struct record_opts *opts);
 290         size_t (*info_priv_size)(struct auxtrace_record *itr);
 291         int (*info_fill)(struct auxtrace_record *itr,
 292                          struct perf_session *session,
 293                          struct auxtrace_info_event *auxtrace_info,
 294                          size_t priv_size);
 295         void (*free)(struct auxtrace_record *itr);
 296         int (*snapshot_start)(struct auxtrace_record *itr);
 297         int (*snapshot_finish)(struct auxtrace_record *itr);
 298         int (*find_snapshot)(struct auxtrace_record *itr, int idx,
 299                              struct auxtrace_mmap *mm, unsigned char *data,
 300                              u64 *head, u64 *old);
 301         int (*parse_snapshot_options)(struct auxtrace_record *itr,
 302                                       struct record_opts *opts,
 303                                       const char *str);
 304         u64 (*reference)(struct auxtrace_record *itr);
 305         int (*read_finish)(struct auxtrace_record *itr, int idx);
 306         unsigned int alignment;
 307 };
 308
 309 #ifdef HAVE_AUXTRACE_SUPPORT
 310
 311 /*
 312  * In snapshot mode the mmapped page is read-only which makes using
 313  * __sync_val_compare_and_swap() problematic.  However, snapshot mode expects
 314  * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
 315  * the event) so there is not a race anyway.
 316  */
 317 static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
 318 {
 319         struct perf_event_mmap_page *pc = mm->userpg;
 320         u64 head = ACCESS_ONCE(pc->aux_head);
 321
 322         /* Ensure all reads are done after we read the head */
 323         rmb();
 324         return head;
 325 }
 326
 327 static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
 328 {
 329         struct perf_event_mmap_page *pc = mm->userpg;
 330 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 331         u64 head = ACCESS_ONCE(pc->aux_head);
 332 #else
 333         u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
 334 #endif
 335
 336         /* Ensure all reads are done after we read the head */
 337         rmb();
 338         return head;
 339 }
 340
 341 static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
 342 {
 343         struct perf_event_mmap_page *pc = mm->userpg;
 344 #if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 345         u64 old_tail;
 346 #endif
 347
 348         /* Ensure all reads are done before we write the tail out */
 349         mb();
 350 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 351         pc->aux_tail = tail;
 352 #else
 353         do {
 354                 old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
 355         } while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
 356 #endif
 357 }
 358
 359 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 360                         struct auxtrace_mmap_params *mp,
 361                         void *userpg, int fd);
 362 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 363 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 364                                 off_t auxtrace_offset,
 365                                 unsigned int auxtrace_pages,
 366                                 bool auxtrace_overwrite);
 367 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 368                                    struct perf_evlist *evlist, int idx,
 369                                    bool per_cpu);
 370
 371 typedef int (*process_auxtrace_t)(struct perf_tool *tool,
 372                                   union perf_event *event, void *data1,
 373                                   size_t len1, void *data2, size_t len2);
 374
 375 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
 376                         struct perf_tool *tool, process_auxtrace_t fn);
 377
 378 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
 379                                  struct auxtrace_record *itr,
 380                                  struct perf_tool *tool, process_auxtrace_t fn,
 381                                  size_t snapshot_size);
 382
 383 int auxtrace_queues__init(struct auxtrace_queues *queues);
 384 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
 385                                struct perf_session *session,
 386                                union perf_event *event, off_t data_offset,
 387                                struct auxtrace_buffer **buffer_ptr);
 388 void auxtrace_queues__free(struct auxtrace_queues *queues);
 389 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 390                                    struct perf_session *session);
 391 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
 392                                               struct auxtrace_buffer *buffer);
 393 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
 394 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
 395 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
 396 void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
 397
 398 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
 399                        u64 ordinal);
 400 void auxtrace_heap__pop(struct auxtrace_heap *heap);
 401 void auxtrace_heap__free(struct auxtrace_heap *heap);
 402
 403 struct auxtrace_cache_entry {
 404         struct hlist_node hash;
 405         u32 key;
 406 };
 407
 408 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
 409                                            unsigned int limit_percent);
 410 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
 411 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
 412 void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
 413 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
 414                         struct auxtrace_cache_entry *entry);
 415 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
 416
 417 struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
 418                                               int *err);
 419
 420 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 421                                     struct record_opts *opts,
 422                                     const char *str);
 423 int auxtrace_record__options(struct auxtrace_record *itr,
 424                              struct perf_evlist *evlist,
 425                              struct record_opts *opts);
 426 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr);
 427 int auxtrace_record__info_fill(struct auxtrace_record *itr,
 428                                struct perf_session *session,
 429                                struct auxtrace_info_event *auxtrace_info,
 430                                size_t priv_size);
 431 void auxtrace_record__free(struct auxtrace_record *itr);
 432 int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
 433 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr);
 434 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
 435                                    struct auxtrace_mmap *mm,
 436                                    unsigned char *data, u64 *head, u64 *old);
 437 u64 auxtrace_record__reference(struct auxtrace_record *itr);
 438
 439 int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
 440                                    off_t file_offset);
 441 int auxtrace_index__write(int fd, struct list_head *head);
 442 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 443                             bool needs_swap);
 444 void auxtrace_index__free(struct list_head *head);
 445
 446 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
 447                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
 448                           const char *msg);
 449
 450 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
 451                                          struct perf_tool *tool,
 452                                          struct perf_session *session,
 453                                          perf_event__handler_t process);
 454 int perf_event__process_auxtrace_info(struct perf_tool *tool,
 455                                       union perf_event *event,
 456                                       struct perf_session *session);
 457 s64 perf_event__process_auxtrace(struct perf_tool *tool,
 458                                  union perf_event *event,
 459                                  struct perf_session *session);
 460 int perf_event__process_auxtrace_error(struct perf_tool *tool,
 461                                        union perf_event *event,
 462                                        struct perf_session *session);
 463 int itrace_parse_synth_opts(const struct option *opt, const char *str,
 464                             int unset);
 465 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
 466
 467 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
 468 void perf_session__auxtrace_error_inc(struct perf_session *session,
 469                                       union perf_event *event);
 470 void events_stats__auxtrace_error_warn(const struct events_stats *stats);
 471
 472 static inline int auxtrace__process_event(struct perf_session *session,
 473                                           union perf_event *event,
 474                                           struct perf_sample *sample,
 475                                           struct perf_tool *tool)
 476 {
 477         if (!session->auxtrace)
 478                 return 0;
 479
 480         return session->auxtrace->process_event(session, event, sample, tool);
 481 }
 482
 483 static inline int auxtrace__flush_events(struct perf_session *session,
 484                                          struct perf_tool *tool)
 485 {
 486         if (!session->auxtrace)
 487                 return 0;
 488
 489         return session->auxtrace->flush_events(session, tool);
 490 }
 491
 492 static inline void auxtrace__free_events(struct perf_session *session)
 493 {
 494         if (!session->auxtrace)
 495                 return;
 496
 497         return session->auxtrace->free_events(session);
 498 }
 499
 500 static inline void auxtrace__free(struct perf_session *session)
 501 {
 502         if (!session->auxtrace)
 503                 return;
 504
 505         return session->auxtrace->free(session);
 506 }
 507
 508 #else
 509
 510 static inline struct auxtrace_record *
 511 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused,
 512                       int *err __maybe_unused)
 513 {
 514         *err = 0;
 515         return NULL;
 516 }
 517
 518 static inline
 519 void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
 520 {
 521 }
 522
 523 static inline int
 524 perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
 525                                      struct perf_tool *tool __maybe_unused,
 526                                      struct perf_session *session __maybe_unused,
 527                                      perf_event__handler_t process __maybe_unused)
 528 {
 529         return -EINVAL;
 530 }
 531
 532 static inline
 533 int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
 534                              struct perf_evlist *evlist __maybe_unused,
 535                              struct record_opts *opts __maybe_unused)
 536 {
 537         return 0;
 538 }
 539
 540 #define perf_event__process_auxtrace_info               0
 541 #define perf_event__process_auxtrace                    0
 542 #define perf_event__process_auxtrace_error              0
 543
 544 static inline
 545 void perf_session__auxtrace_error_inc(struct perf_session *session
 546                                       __maybe_unused,
 547                                       union perf_event *event
 548                                       __maybe_unused)
 549 {
 550 }
 551
 552 static inline
 553 void events_stats__auxtrace_error_warn(const struct events_stats *stats
 554                                        __maybe_unused)
 555 {
 556 }
 557
 558 static inline
 559 int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
 560                             const char *str __maybe_unused,
 561                             int unset __maybe_unused)
 562 {
 563         pr_err("AUX area tracing not supported\n");
 564         return -EINVAL;
 565 }
 566
 567 static inline
 568 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
 569                                     struct record_opts *opts __maybe_unused,
 570                                     const char *str)
 571 {
 572         if (!str)
 573                 return 0;
 574         pr_err("AUX area tracing not supported\n");
 575         return -EINVAL;
 576 }
 577
 578 static inline
 579 int auxtrace__process_event(struct perf_session *session __maybe_unused,
 580                             union perf_event *event __maybe_unused,
 581                             struct perf_sample *sample __maybe_unused,
 582                             struct perf_tool *tool __maybe_unused)
 583 {
 584         return 0;
 585 }
 586
 587 static inline
 588 int auxtrace__flush_events(struct perf_session *session __maybe_unused,
 589                            struct perf_tool *tool __maybe_unused)
 590 {
 591         return 0;
 592 }
 593
 594 static inline
 595 void auxtrace__free_events(struct perf_session *session __maybe_unused)
 596 {
 597 }
 598
 599 static inline
 600 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
 601 {
 602 }
 603
 604 static inline
 605 void auxtrace__free(struct perf_session *session __maybe_unused)
 606 {
 607 }
 608
 609 static inline
 610 int auxtrace_index__write(int fd __maybe_unused,
 611                           struct list_head *head __maybe_unused)
 612 {
 613         return -EINVAL;
 614 }
 615
 616 static inline
 617 int auxtrace_index__process(int fd __maybe_unused,
 618                             u64 size __maybe_unused,
 619                             struct perf_session *session __maybe_unused,
 620                             bool needs_swap __maybe_unused)
 621 {
 622         return -EINVAL;
 623 }
 624
 625 static inline
 626 void auxtrace_index__free(struct list_head *head __maybe_unused)
 627 {
 628 }
 629
 630 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 631                         struct auxtrace_mmap_params *mp,
 632                         void *userpg, int fd);
 633 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 634 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 635                                 off_t auxtrace_offset,
 636                                 unsigned int auxtrace_pages,
 637                                 bool auxtrace_overwrite);
 638 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 639                                    struct perf_evlist *evlist, int idx,
 640                                    bool per_cpu);
 641
 642 #endif
 643
 644 #endif