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         PERF_AUXTRACE_INTEL_PT,
  43         PERF_AUXTRACE_INTEL_BTS,
  44 };
  45
  46 enum itrace_period_type {
  47         PERF_ITRACE_PERIOD_INSTRUCTIONS,
  48         PERF_ITRACE_PERIOD_TICKS,
  49         PERF_ITRACE_PERIOD_NANOSECS,
  50 };
  51
  52 /**
  53  * struct itrace_synth_opts - AUX area tracing synthesis options.
  54  * @set: indicates whether or not options have been set
  55  * @inject: indicates the event (not just the sample) must be fully synthesized
  56  *          because 'perf inject' will write it out
  57  * @instructions: whether to synthesize 'instructions' events
  58  * @branches: whether to synthesize 'branches' events
  59  * @transactions: whether to synthesize events for transactions
  60  * @errors: whether to synthesize decoder error events
  61  * @dont_decode: whether to skip decoding entirely
  62  * @log: write a decoding log
  63  * @calls: limit branch samples to calls (can be combined with @returns)
  64  * @returns: limit branch samples to returns (can be combined with @calls)
  65  * @callchain: add callchain to 'instructions' events
  66  * @last_branch: add branch context to 'instruction' events
  67  * @callchain_sz: maximum callchain size
  68  * @last_branch_sz: branch context size
  69  * @period: 'instructions' events period
  70  * @period_type: 'instructions' events period type
  71  */
  72 struct itrace_synth_opts {
  73         bool                    set;
  74         bool                    inject;
  75         bool                    instructions;
  76         bool                    branches;
  77         bool                    transactions;
  78         bool                    errors;
  79         bool                    dont_decode;
  80         bool                    log;
  81         bool                    calls;
  82         bool                    returns;
  83         bool                    callchain;
  84         bool                    last_branch;
  85         unsigned int            callchain_sz;
  86         unsigned int            last_branch_sz;
  87         unsigned long long      period;
  88         enum itrace_period_type period_type;
  89 };
  90
  91 /**
  92  * struct auxtrace_index_entry - indexes a AUX area tracing event within a
  93  *                               perf.data file.
  94  * @file_offset: offset within the perf.data file
  95  * @sz: size of the event
  96  */
  97 struct auxtrace_index_entry {
  98         u64                     file_offset;
  99         u64                     sz;
 100 };
 101
 102 #define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
 103
 104 /**
 105  * struct auxtrace_index - index of AUX area tracing events within a perf.data
 106  *                         file.
 107  * @list: linking a number of arrays of entries
 108  * @nr: number of entries
 109  * @entries: array of entries
 110  */
 111 struct auxtrace_index {
 112         struct list_head        list;
 113         size_t                  nr;
 114         struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
 115 };
 116
 117 /**
 118  * struct auxtrace - session callbacks to allow AUX area data decoding.
 119  * @process_event: lets the decoder see all session events
 120  * @flush_events: process any remaining data
 121  * @free_events: free resources associated with event processing
 122  * @free: free resources associated with the session
 123  */
 124 struct auxtrace {
 125         int (*process_event)(struct perf_session *session,
 126                              union perf_event *event,
 127                              struct perf_sample *sample,
 128                              struct perf_tool *tool);
 129         int (*process_auxtrace_event)(struct perf_session *session,
 130                                       union perf_event *event,
 131                                       struct perf_tool *tool);
 132         int (*flush_events)(struct perf_session *session,
 133                             struct perf_tool *tool);
 134         void (*free_events)(struct perf_session *session);
 135         void (*free)(struct perf_session *session);
 136 };
 137
 138 /**
 139  * struct auxtrace_buffer - a buffer containing AUX area tracing data.
 140  * @list: buffers are queued in a list held by struct auxtrace_queue
 141  * @size: size of the buffer in bytes
 142  * @pid: in per-thread mode, the pid this buffer is associated with
 143  * @tid: in per-thread mode, the tid this buffer is associated with
 144  * @cpu: in per-cpu mode, the cpu this buffer is associated with
 145  * @data: actual buffer data (can be null if the data has not been loaded)
 146  * @data_offset: file offset at which the buffer can be read
 147  * @mmap_addr: mmap address at which the buffer can be read
 148  * @mmap_size: size of the mmap at @mmap_addr
 149  * @data_needs_freeing: @data was malloc'd so free it when it is no longer
 150  *                      needed
 151  * @consecutive: the original data was split up and this buffer is consecutive
 152  *               to the previous buffer
 153  * @offset: offset as determined by aux_head / aux_tail members of struct
 154  *          perf_event_mmap_page
 155  * @reference: an implementation-specific reference determined when the data is
 156  *             recorded
 157  * @buffer_nr: used to number each buffer
 158  * @use_size: implementation actually only uses this number of bytes
 159  * @use_data: implementation actually only uses data starting at this address
 160  */
 161 struct auxtrace_buffer {
 162         struct list_head        list;
 163         size_t                  size;
 164         pid_t                   pid;
 165         pid_t                   tid;
 166         int                     cpu;
 167         void                    *data;
 168         off_t                   data_offset;
 169         void                    *mmap_addr;
 170         size_t                  mmap_size;
 171         bool                    data_needs_freeing;
 172         bool                    consecutive;
 173         u64                     offset;
 174         u64                     reference;
 175         u64                     buffer_nr;
 176         size_t                  use_size;
 177         void                    *use_data;
 178 };
 179
 180 /**
 181  * struct auxtrace_queue - a queue of AUX area tracing data buffers.
 182  * @head: head of buffer list
 183  * @tid: in per-thread mode, the tid this queue is associated with
 184  * @cpu: in per-cpu mode, the cpu this queue is associated with
 185  * @set: %true once this queue has been dedicated to a specific thread or cpu
 186  * @priv: implementation-specific data
 187  */
 188 struct auxtrace_queue {
 189         struct list_head        head;
 190         pid_t                   tid;
 191         int                     cpu;
 192         bool                    set;
 193         void                    *priv;
 194 };
 195
 196 /**
 197  * struct auxtrace_queues - an array of AUX area tracing queues.
 198  * @queue_array: array of queues
 199  * @nr_queues: number of queues
 200  * @new_data: set whenever new data is queued
 201  * @populated: queues have been fully populated using the auxtrace_index
 202  * @next_buffer_nr: used to number each buffer
 203  */
 204 struct auxtrace_queues {
 205         struct auxtrace_queue   *queue_array;
 206         unsigned int            nr_queues;
 207         bool                    new_data;
 208         bool                    populated;
 209         u64                     next_buffer_nr;
 210 };
 211
 212 /**
 213  * struct auxtrace_heap_item - element of struct auxtrace_heap.
 214  * @queue_nr: queue number
 215  * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
 216  *           to be a timestamp
 217  */
 218 struct auxtrace_heap_item {
 219         unsigned int            queue_nr;
 220         u64                     ordinal;
 221 };
 222
 223 /**
 224  * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
 225  * @heap_array: the heap
 226  * @heap_cnt: the number of elements in the heap
 227  * @heap_sz: maximum number of elements (grows as needed)
 228  */
 229 struct auxtrace_heap {
 230         struct auxtrace_heap_item       *heap_array;
 231         unsigned int            heap_cnt;
 232         unsigned int            heap_sz;
 233 };
 234
 235 /**
 236  * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
 237  * @base: address of mapped area
 238  * @userpg: pointer to buffer's perf_event_mmap_page
 239  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 240  * @len: size of mapped area
 241  * @prev: previous aux_head
 242  * @idx: index of this mmap
 243  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 244  *       mmap) otherwise %0
 245  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 246  */
 247 struct auxtrace_mmap {
 248         void            *base;
 249         void            *userpg;
 250         size_t          mask;
 251         size_t          len;
 252         u64             prev;
 253         int             idx;
 254         pid_t           tid;
 255         int             cpu;
 256 };
 257
 258 /**
 259  * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
 260  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 261  * @offset: file offset of mapped area
 262  * @len: size of mapped area
 263  * @prot: mmap memory protection
 264  * @idx: index of this mmap
 265  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 266  *       mmap) otherwise %0
 267  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 268  */
 269 struct auxtrace_mmap_params {
 270         size_t          mask;
 271         off_t           offset;
 272         size_t          len;
 273         int             prot;
 274         int             idx;
 275         pid_t           tid;
 276         int             cpu;
 277 };
 278
 279 /**
 280  * struct auxtrace_record - callbacks for recording AUX area data.
 281  * @recording_options: validate and process recording options
 282  * @info_priv_size: return the size of the private data in auxtrace_info_event
 283  * @info_fill: fill-in the private data in auxtrace_info_event
 284  * @free: free this auxtrace record structure
 285  * @snapshot_start: starting a snapshot
 286  * @snapshot_finish: finishing a snapshot
 287  * @find_snapshot: find data to snapshot within auxtrace mmap
 288  * @parse_snapshot_options: parse snapshot options
 289  * @reference: provide a 64-bit reference number for auxtrace_event
 290  * @read_finish: called after reading from an auxtrace mmap
 291  */
 292 struct auxtrace_record {
 293         int (*recording_options)(struct auxtrace_record *itr,
 294                                  struct perf_evlist *evlist,
 295                                  struct record_opts *opts);
 296         size_t (*info_priv_size)(struct auxtrace_record *itr);
 297         int (*info_fill)(struct auxtrace_record *itr,
 298                          struct perf_session *session,
 299                          struct auxtrace_info_event *auxtrace_info,
 300                          size_t priv_size);
 301         void (*free)(struct auxtrace_record *itr);
 302         int (*snapshot_start)(struct auxtrace_record *itr);
 303         int (*snapshot_finish)(struct auxtrace_record *itr);
 304         int (*find_snapshot)(struct auxtrace_record *itr, int idx,
 305                              struct auxtrace_mmap *mm, unsigned char *data,
 306                              u64 *head, u64 *old);
 307         int (*parse_snapshot_options)(struct auxtrace_record *itr,
 308                                       struct record_opts *opts,
 309                                       const char *str);
 310         u64 (*reference)(struct auxtrace_record *itr);
 311         int (*read_finish)(struct auxtrace_record *itr, int idx);
 312         unsigned int alignment;
 313 };
 314
 315 #ifdef HAVE_AUXTRACE_SUPPORT
 316
 317 /*
 318  * In snapshot mode the mmapped page is read-only which makes using
 319  * __sync_val_compare_and_swap() problematic.  However, snapshot mode expects
 320  * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
 321  * the event) so there is not a race anyway.
 322  */
 323 static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
 324 {
 325         struct perf_event_mmap_page *pc = mm->userpg;
 326         u64 head = ACCESS_ONCE(pc->aux_head);
 327
 328         /* Ensure all reads are done after we read the head */
 329         rmb();
 330         return head;
 331 }
 332
 333 static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
 334 {
 335         struct perf_event_mmap_page *pc = mm->userpg;
 336 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 337         u64 head = ACCESS_ONCE(pc->aux_head);
 338 #else
 339         u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
 340 #endif
 341
 342         /* Ensure all reads are done after we read the head */
 343         rmb();
 344         return head;
 345 }
 346
 347 static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
 348 {
 349         struct perf_event_mmap_page *pc = mm->userpg;
 350 #if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 351         u64 old_tail;
 352 #endif
 353
 354         /* Ensure all reads are done before we write the tail out */
 355         mb();
 356 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 357         pc->aux_tail = tail;
 358 #else
 359         do {
 360                 old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
 361         } while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
 362 #endif
 363 }
 364
 365 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 366                         struct auxtrace_mmap_params *mp,
 367                         void *userpg, int fd);
 368 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 369 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 370                                 off_t auxtrace_offset,
 371                                 unsigned int auxtrace_pages,
 372                                 bool auxtrace_overwrite);
 373 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 374                                    struct perf_evlist *evlist, int idx,
 375                                    bool per_cpu);
 376
 377 typedef int (*process_auxtrace_t)(struct perf_tool *tool,
 378                                   union perf_event *event, void *data1,
 379                                   size_t len1, void *data2, size_t len2);
 380
 381 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
 382                         struct perf_tool *tool, process_auxtrace_t fn);
 383
 384 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
 385                                  struct auxtrace_record *itr,
 386                                  struct perf_tool *tool, process_auxtrace_t fn,
 387                                  size_t snapshot_size);
 388
 389 int auxtrace_queues__init(struct auxtrace_queues *queues);
 390 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
 391                                struct perf_session *session,
 392                                union perf_event *event, off_t data_offset,
 393                                struct auxtrace_buffer **buffer_ptr);
 394 void auxtrace_queues__free(struct auxtrace_queues *queues);
 395 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 396                                    struct perf_session *session);
 397 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
 398                                               struct auxtrace_buffer *buffer);
 399 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
 400 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
 401 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
 402 void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
 403
 404 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
 405                        u64 ordinal);
 406 void auxtrace_heap__pop(struct auxtrace_heap *heap);
 407 void auxtrace_heap__free(struct auxtrace_heap *heap);
 408
 409 struct auxtrace_cache_entry {
 410         struct hlist_node hash;
 411         u32 key;
 412 };
 413
 414 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
 415                                            unsigned int limit_percent);
 416 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
 417 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
 418 void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
 419 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
 420                         struct auxtrace_cache_entry *entry);
 421 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
 422
 423 struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
 424                                               int *err);
 425
 426 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 427                                     struct record_opts *opts,
 428                                     const char *str);
 429 int auxtrace_record__options(struct auxtrace_record *itr,
 430                              struct perf_evlist *evlist,
 431                              struct record_opts *opts);
 432 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr);
 433 int auxtrace_record__info_fill(struct auxtrace_record *itr,
 434                                struct perf_session *session,
 435                                struct auxtrace_info_event *auxtrace_info,
 436                                size_t priv_size);
 437 void auxtrace_record__free(struct auxtrace_record *itr);
 438 int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
 439 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr);
 440 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
 441                                    struct auxtrace_mmap *mm,
 442                                    unsigned char *data, u64 *head, u64 *old);
 443 u64 auxtrace_record__reference(struct auxtrace_record *itr);
 444
 445 int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
 446                                    off_t file_offset);
 447 int auxtrace_index__write(int fd, struct list_head *head);
 448 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 449                             bool needs_swap);
 450 void auxtrace_index__free(struct list_head *head);
 451
 452 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
 453                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
 454                           const char *msg);
 455
 456 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
 457                                          struct perf_tool *tool,
 458                                          struct perf_session *session,
 459                                          perf_event__handler_t process);
 460 int perf_event__process_auxtrace_info(struct perf_tool *tool,
 461                                       union perf_event *event,
 462                                       struct perf_session *session);
 463 s64 perf_event__process_auxtrace(struct perf_tool *tool,
 464                                  union perf_event *event,
 465                                  struct perf_session *session);
 466 int perf_event__process_auxtrace_error(struct perf_tool *tool,
 467                                        union perf_event *event,
 468                                        struct perf_session *session);
 469 int itrace_parse_synth_opts(const struct option *opt, const char *str,
 470                             int unset);
 471 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
 472
 473 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
 474 void perf_session__auxtrace_error_inc(struct perf_session *session,
 475                                       union perf_event *event);
 476 void events_stats__auxtrace_error_warn(const struct events_stats *stats);
 477
 478 static inline int auxtrace__process_event(struct perf_session *session,
 479                                           union perf_event *event,
 480                                           struct perf_sample *sample,
 481                                           struct perf_tool *tool)
 482 {
 483         if (!session->auxtrace)
 484                 return 0;
 485
 486         return session->auxtrace->process_event(session, event, sample, tool);
 487 }
 488
 489 static inline int auxtrace__flush_events(struct perf_session *session,
 490                                          struct perf_tool *tool)
 491 {
 492         if (!session->auxtrace)
 493                 return 0;
 494
 495         return session->auxtrace->flush_events(session, tool);
 496 }
 497
 498 static inline void auxtrace__free_events(struct perf_session *session)
 499 {
 500         if (!session->auxtrace)
 501                 return;
 502
 503         return session->auxtrace->free_events(session);
 504 }
 505
 506 static inline void auxtrace__free(struct perf_session *session)
 507 {
 508         if (!session->auxtrace)
 509                 return;
 510
 511         return session->auxtrace->free(session);
 512 }
 513
 514 #else
 515
 516 static inline struct auxtrace_record *
 517 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused,
 518                       int *err __maybe_unused)
 519 {
 520         *err = 0;
 521         return NULL;
 522 }
 523
 524 static inline
 525 void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
 526 {
 527 }
 528
 529 static inline int
 530 perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
 531                                      struct perf_tool *tool __maybe_unused,
 532                                      struct perf_session *session __maybe_unused,
 533                                      perf_event__handler_t process __maybe_unused)
 534 {
 535         return -EINVAL;
 536 }
 537
 538 static inline
 539 int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
 540                              struct perf_evlist *evlist __maybe_unused,
 541                              struct record_opts *opts __maybe_unused)
 542 {
 543         return 0;
 544 }
 545
 546 #define perf_event__process_auxtrace_info               0
 547 #define perf_event__process_auxtrace                    0
 548 #define perf_event__process_auxtrace_error              0
 549
 550 static inline
 551 void perf_session__auxtrace_error_inc(struct perf_session *session
 552                                       __maybe_unused,
 553                                       union perf_event *event
 554                                       __maybe_unused)
 555 {
 556 }
 557
 558 static inline
 559 void events_stats__auxtrace_error_warn(const struct events_stats *stats
 560                                        __maybe_unused)
 561 {
 562 }
 563
 564 static inline
 565 int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
 566                             const char *str __maybe_unused,
 567                             int unset __maybe_unused)
 568 {
 569         pr_err("AUX area tracing not supported\n");
 570         return -EINVAL;
 571 }
 572
 573 static inline
 574 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
 575                                     struct record_opts *opts __maybe_unused,
 576                                     const char *str)
 577 {
 578         if (!str)
 579                 return 0;
 580         pr_err("AUX area tracing not supported\n");
 581         return -EINVAL;
 582 }
 583
 584 static inline
 585 int auxtrace__process_event(struct perf_session *session __maybe_unused,
 586                             union perf_event *event __maybe_unused,
 587                             struct perf_sample *sample __maybe_unused,
 588                             struct perf_tool *tool __maybe_unused)
 589 {
 590         return 0;
 591 }
 592
 593 static inline
 594 int auxtrace__flush_events(struct perf_session *session __maybe_unused,
 595                            struct perf_tool *tool __maybe_unused)
 596 {
 597         return 0;
 598 }
 599
 600 static inline
 601 void auxtrace__free_events(struct perf_session *session __maybe_unused)
 602 {
 603 }
 604
 605 static inline
 606 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
 607 {
 608 }
 609
 610 static inline
 611 void auxtrace__free(struct perf_session *session __maybe_unused)
 612 {
 613 }
 614
 615 static inline
 616 int auxtrace_index__write(int fd __maybe_unused,
 617                           struct list_head *head __maybe_unused)
 618 {
 619         return -EINVAL;
 620 }
 621
 622 static inline
 623 int auxtrace_index__process(int fd __maybe_unused,
 624                             u64 size __maybe_unused,
 625                             struct perf_session *session __maybe_unused,
 626                             bool needs_swap __maybe_unused)
 627 {
 628         return -EINVAL;
 629 }
 630
 631 static inline
 632 void auxtrace_index__free(struct list_head *head __maybe_unused)
 633 {
 634 }
 635
 636 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 637                         struct auxtrace_mmap_params *mp,
 638                         void *userpg, int fd);
 639 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 640 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 641                                 off_t auxtrace_offset,
 642                                 unsigned int auxtrace_pages,
 643                                 bool auxtrace_overwrite);
 644 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 645                                    struct perf_evlist *evlist, int idx,
 646                                    bool per_cpu);
 647
 648 #endif
 649
 650 #endif