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  * @thread_stack: feed branches to the thread_stack
  67  * @last_branch: add branch context to 'instruction' events
  68  * @callchain_sz: maximum callchain size
  69  * @last_branch_sz: branch context size
  70  * @period: 'instructions' events period
  71  * @period_type: 'instructions' events period type
  72  * @initial_skip: skip N events at the beginning.
  73  */
  74 struct itrace_synth_opts {
  75         bool                    set;
  76         bool                    inject;
  77         bool                    instructions;
  78         bool                    branches;
  79         bool                    transactions;
  80         bool                    errors;
  81         bool                    dont_decode;
  82         bool                    log;
  83         bool                    calls;
  84         bool                    returns;
  85         bool                    callchain;
  86         bool                    thread_stack;
  87         bool                    last_branch;
  88         unsigned int            callchain_sz;
  89         unsigned int            last_branch_sz;
  90         unsigned long long      period;
  91         enum itrace_period_type period_type;
  92         unsigned long           initial_skip;
  93 };
  94
  95 /**
  96  * struct auxtrace_index_entry - indexes a AUX area tracing event within a
  97  *                               perf.data file.
  98  * @file_offset: offset within the perf.data file
  99  * @sz: size of the event
 100  */
 101 struct auxtrace_index_entry {
 102         u64                     file_offset;
 103         u64                     sz;
 104 };
 105
 106 #define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
 107
 108 /**
 109  * struct auxtrace_index - index of AUX area tracing events within a perf.data
 110  *                         file.
 111  * @list: linking a number of arrays of entries
 112  * @nr: number of entries
 113  * @entries: array of entries
 114  */
 115 struct auxtrace_index {
 116         struct list_head        list;
 117         size_t                  nr;
 118         struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
 119 };
 120
 121 /**
 122  * struct auxtrace - session callbacks to allow AUX area data decoding.
 123  * @process_event: lets the decoder see all session events
 124  * @flush_events: process any remaining data
 125  * @free_events: free resources associated with event processing
 126  * @free: free resources associated with the session
 127  */
 128 struct auxtrace {
 129         int (*process_event)(struct perf_session *session,
 130                              union perf_event *event,
 131                              struct perf_sample *sample,
 132                              struct perf_tool *tool);
 133         int (*process_auxtrace_event)(struct perf_session *session,
 134                                       union perf_event *event,
 135                                       struct perf_tool *tool);
 136         int (*flush_events)(struct perf_session *session,
 137                             struct perf_tool *tool);
 138         void (*free_events)(struct perf_session *session);
 139         void (*free)(struct perf_session *session);
 140 };
 141
 142 /**
 143  * struct auxtrace_buffer - a buffer containing AUX area tracing data.
 144  * @list: buffers are queued in a list held by struct auxtrace_queue
 145  * @size: size of the buffer in bytes
 146  * @pid: in per-thread mode, the pid this buffer is associated with
 147  * @tid: in per-thread mode, the tid this buffer is associated with
 148  * @cpu: in per-cpu mode, the cpu this buffer is associated with
 149  * @data: actual buffer data (can be null if the data has not been loaded)
 150  * @data_offset: file offset at which the buffer can be read
 151  * @mmap_addr: mmap address at which the buffer can be read
 152  * @mmap_size: size of the mmap at @mmap_addr
 153  * @data_needs_freeing: @data was malloc'd so free it when it is no longer
 154  *                      needed
 155  * @consecutive: the original data was split up and this buffer is consecutive
 156  *               to the previous buffer
 157  * @offset: offset as determined by aux_head / aux_tail members of struct
 158  *          perf_event_mmap_page
 159  * @reference: an implementation-specific reference determined when the data is
 160  *             recorded
 161  * @buffer_nr: used to number each buffer
 162  * @use_size: implementation actually only uses this number of bytes
 163  * @use_data: implementation actually only uses data starting at this address
 164  */
 165 struct auxtrace_buffer {
 166         struct list_head        list;
 167         size_t                  size;
 168         pid_t                   pid;
 169         pid_t                   tid;
 170         int                     cpu;
 171         void                    *data;
 172         off_t                   data_offset;
 173         void                    *mmap_addr;
 174         size_t                  mmap_size;
 175         bool                    data_needs_freeing;
 176         bool                    consecutive;
 177         u64                     offset;
 178         u64                     reference;
 179         u64                     buffer_nr;
 180         size_t                  use_size;
 181         void                    *use_data;
 182 };
 183
 184 /**
 185  * struct auxtrace_queue - a queue of AUX area tracing data buffers.
 186  * @head: head of buffer list
 187  * @tid: in per-thread mode, the tid this queue is associated with
 188  * @cpu: in per-cpu mode, the cpu this queue is associated with
 189  * @set: %true once this queue has been dedicated to a specific thread or cpu
 190  * @priv: implementation-specific data
 191  */
 192 struct auxtrace_queue {
 193         struct list_head        head;
 194         pid_t                   tid;
 195         int                     cpu;
 196         bool                    set;
 197         void                    *priv;
 198 };
 199
 200 /**
 201  * struct auxtrace_queues - an array of AUX area tracing queues.
 202  * @queue_array: array of queues
 203  * @nr_queues: number of queues
 204  * @new_data: set whenever new data is queued
 205  * @populated: queues have been fully populated using the auxtrace_index
 206  * @next_buffer_nr: used to number each buffer
 207  */
 208 struct auxtrace_queues {
 209         struct auxtrace_queue   *queue_array;
 210         unsigned int            nr_queues;
 211         bool                    new_data;
 212         bool                    populated;
 213         u64                     next_buffer_nr;
 214 };
 215
 216 /**
 217  * struct auxtrace_heap_item - element of struct auxtrace_heap.
 218  * @queue_nr: queue number
 219  * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
 220  *           to be a timestamp
 221  */
 222 struct auxtrace_heap_item {
 223         unsigned int            queue_nr;
 224         u64                     ordinal;
 225 };
 226
 227 /**
 228  * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
 229  * @heap_array: the heap
 230  * @heap_cnt: the number of elements in the heap
 231  * @heap_sz: maximum number of elements (grows as needed)
 232  */
 233 struct auxtrace_heap {
 234         struct auxtrace_heap_item       *heap_array;
 235         unsigned int            heap_cnt;
 236         unsigned int            heap_sz;
 237 };
 238
 239 /**
 240  * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
 241  * @base: address of mapped area
 242  * @userpg: pointer to buffer's perf_event_mmap_page
 243  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 244  * @len: size of mapped area
 245  * @prev: previous aux_head
 246  * @idx: index of this mmap
 247  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 248  *       mmap) otherwise %0
 249  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 250  */
 251 struct auxtrace_mmap {
 252         void            *base;
 253         void            *userpg;
 254         size_t          mask;
 255         size_t          len;
 256         u64             prev;
 257         int             idx;
 258         pid_t           tid;
 259         int             cpu;
 260 };
 261
 262 /**
 263  * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
 264  * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
 265  * @offset: file offset of mapped area
 266  * @len: size of mapped area
 267  * @prot: mmap memory protection
 268  * @idx: index of this mmap
 269  * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
 270  *       mmap) otherwise %0
 271  * @cpu: cpu number for a per-cpu mmap otherwise %-1
 272  */
 273 struct auxtrace_mmap_params {
 274         size_t          mask;
 275         off_t           offset;
 276         size_t          len;
 277         int             prot;
 278         int             idx;
 279         pid_t           tid;
 280         int             cpu;
 281 };
 282
 283 /**
 284  * struct auxtrace_record - callbacks for recording AUX area data.
 285  * @recording_options: validate and process recording options
 286  * @info_priv_size: return the size of the private data in auxtrace_info_event
 287  * @info_fill: fill-in the private data in auxtrace_info_event
 288  * @free: free this auxtrace record structure
 289  * @snapshot_start: starting a snapshot
 290  * @snapshot_finish: finishing a snapshot
 291  * @find_snapshot: find data to snapshot within auxtrace mmap
 292  * @parse_snapshot_options: parse snapshot options
 293  * @reference: provide a 64-bit reference number for auxtrace_event
 294  * @read_finish: called after reading from an auxtrace mmap
 295  */
 296 struct auxtrace_record {
 297         int (*recording_options)(struct auxtrace_record *itr,
 298                                  struct perf_evlist *evlist,
 299                                  struct record_opts *opts);
 300         size_t (*info_priv_size)(struct auxtrace_record *itr,
 301                                  struct perf_evlist *evlist);
 302         int (*info_fill)(struct auxtrace_record *itr,
 303                          struct perf_session *session,
 304                          struct auxtrace_info_event *auxtrace_info,
 305                          size_t priv_size);
 306         void (*free)(struct auxtrace_record *itr);
 307         int (*snapshot_start)(struct auxtrace_record *itr);
 308         int (*snapshot_finish)(struct auxtrace_record *itr);
 309         int (*find_snapshot)(struct auxtrace_record *itr, int idx,
 310                              struct auxtrace_mmap *mm, unsigned char *data,
 311                              u64 *head, u64 *old);
 312         int (*parse_snapshot_options)(struct auxtrace_record *itr,
 313                                       struct record_opts *opts,
 314                                       const char *str);
 315         u64 (*reference)(struct auxtrace_record *itr);
 316         int (*read_finish)(struct auxtrace_record *itr, int idx);
 317         unsigned int alignment;
 318 };
 319
 320 #ifdef HAVE_AUXTRACE_SUPPORT
 321
 322 /*
 323  * In snapshot mode the mmapped page is read-only which makes using
 324  * __sync_val_compare_and_swap() problematic.  However, snapshot mode expects
 325  * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
 326  * the event) so there is not a race anyway.
 327  */
 328 static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
 329 {
 330         struct perf_event_mmap_page *pc = mm->userpg;
 331         u64 head = ACCESS_ONCE(pc->aux_head);
 332
 333         /* Ensure all reads are done after we read the head */
 334         rmb();
 335         return head;
 336 }
 337
 338 static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
 339 {
 340         struct perf_event_mmap_page *pc = mm->userpg;
 341 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 342         u64 head = ACCESS_ONCE(pc->aux_head);
 343 #else
 344         u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
 345 #endif
 346
 347         /* Ensure all reads are done after we read the head */
 348         rmb();
 349         return head;
 350 }
 351
 352 static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
 353 {
 354         struct perf_event_mmap_page *pc = mm->userpg;
 355 #if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 356         u64 old_tail;
 357 #endif
 358
 359         /* Ensure all reads are done before we write the tail out */
 360         mb();
 361 #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
 362         pc->aux_tail = tail;
 363 #else
 364         do {
 365                 old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
 366         } while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
 367 #endif
 368 }
 369
 370 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 371                         struct auxtrace_mmap_params *mp,
 372                         void *userpg, int fd);
 373 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 374 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 375                                 off_t auxtrace_offset,
 376                                 unsigned int auxtrace_pages,
 377                                 bool auxtrace_overwrite);
 378 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 379                                    struct perf_evlist *evlist, int idx,
 380                                    bool per_cpu);
 381
 382 typedef int (*process_auxtrace_t)(struct perf_tool *tool,
 383                                   union perf_event *event, void *data1,
 384                                   size_t len1, void *data2, size_t len2);
 385
 386 int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
 387                         struct perf_tool *tool, process_auxtrace_t fn);
 388
 389 int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
 390                                  struct auxtrace_record *itr,
 391                                  struct perf_tool *tool, process_auxtrace_t fn,
 392                                  size_t snapshot_size);
 393
 394 int auxtrace_queues__init(struct auxtrace_queues *queues);
 395 int auxtrace_queues__add_event(struct auxtrace_queues *queues,
 396                                struct perf_session *session,
 397                                union perf_event *event, off_t data_offset,
 398                                struct auxtrace_buffer **buffer_ptr);
 399 void auxtrace_queues__free(struct auxtrace_queues *queues);
 400 int auxtrace_queues__process_index(struct auxtrace_queues *queues,
 401                                    struct perf_session *session);
 402 struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
 403                                               struct auxtrace_buffer *buffer);
 404 void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
 405 void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
 406 void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
 407 void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
 408
 409 int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
 410                        u64 ordinal);
 411 void auxtrace_heap__pop(struct auxtrace_heap *heap);
 412 void auxtrace_heap__free(struct auxtrace_heap *heap);
 413
 414 struct auxtrace_cache_entry {
 415         struct hlist_node hash;
 416         u32 key;
 417 };
 418
 419 struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
 420                                            unsigned int limit_percent);
 421 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
 422 void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
 423 void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
 424 int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
 425                         struct auxtrace_cache_entry *entry);
 426 void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
 427
 428 struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
 429                                               int *err);
 430
 431 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
 432                                     struct record_opts *opts,
 433                                     const char *str);
 434 int auxtrace_record__options(struct auxtrace_record *itr,
 435                              struct perf_evlist *evlist,
 436                              struct record_opts *opts);
 437 size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
 438                                        struct perf_evlist *evlist);
 439 int auxtrace_record__info_fill(struct auxtrace_record *itr,
 440                                struct perf_session *session,
 441                                struct auxtrace_info_event *auxtrace_info,
 442                                size_t priv_size);
 443 void auxtrace_record__free(struct auxtrace_record *itr);
 444 int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
 445 int auxtrace_record__snapshot_finish(struct auxtrace_record *itr);
 446 int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
 447                                    struct auxtrace_mmap *mm,
 448                                    unsigned char *data, u64 *head, u64 *old);
 449 u64 auxtrace_record__reference(struct auxtrace_record *itr);
 450
 451 int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
 452                                    off_t file_offset);
 453 int auxtrace_index__write(int fd, struct list_head *head);
 454 int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
 455                             bool needs_swap);
 456 void auxtrace_index__free(struct list_head *head);
 457
 458 void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
 459                           int code, int cpu, pid_t pid, pid_t tid, u64 ip,
 460                           const char *msg);
 461
 462 int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
 463                                          struct perf_tool *tool,
 464                                          struct perf_session *session,
 465                                          perf_event__handler_t process);
 466 int perf_event__process_auxtrace_info(struct perf_tool *tool,
 467                                       union perf_event *event,
 468                                       struct perf_session *session);
 469 s64 perf_event__process_auxtrace(struct perf_tool *tool,
 470                                  union perf_event *event,
 471                                  struct perf_session *session);
 472 int perf_event__process_auxtrace_error(struct perf_tool *tool,
 473                                        union perf_event *event,
 474                                        struct perf_session *session);
 475 int itrace_parse_synth_opts(const struct option *opt, const char *str,
 476                             int unset);
 477 void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
 478
 479 size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
 480 void perf_session__auxtrace_error_inc(struct perf_session *session,
 481                                       union perf_event *event);
 482 void events_stats__auxtrace_error_warn(const struct events_stats *stats);
 483
 484 static inline int auxtrace__process_event(struct perf_session *session,
 485                                           union perf_event *event,
 486                                           struct perf_sample *sample,
 487                                           struct perf_tool *tool)
 488 {
 489         if (!session->auxtrace)
 490                 return 0;
 491
 492         return session->auxtrace->process_event(session, event, sample, tool);
 493 }
 494
 495 static inline int auxtrace__flush_events(struct perf_session *session,
 496                                          struct perf_tool *tool)
 497 {
 498         if (!session->auxtrace)
 499                 return 0;
 500
 501         return session->auxtrace->flush_events(session, tool);
 502 }
 503
 504 static inline void auxtrace__free_events(struct perf_session *session)
 505 {
 506         if (!session->auxtrace)
 507                 return;
 508
 509         return session->auxtrace->free_events(session);
 510 }
 511
 512 static inline void auxtrace__free(struct perf_session *session)
 513 {
 514         if (!session->auxtrace)
 515                 return;
 516
 517         return session->auxtrace->free(session);
 518 }
 519
 520 #else
 521
 522 static inline struct auxtrace_record *
 523 auxtrace_record__init(struct perf_evlist *evlist __maybe_unused,
 524                       int *err)
 525 {
 526         *err = 0;
 527         return NULL;
 528 }
 529
 530 static inline
 531 void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
 532 {
 533 }
 534
 535 static inline int
 536 perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
 537                                      struct perf_tool *tool __maybe_unused,
 538                                      struct perf_session *session __maybe_unused,
 539                                      perf_event__handler_t process __maybe_unused)
 540 {
 541         return -EINVAL;
 542 }
 543
 544 static inline
 545 int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
 546                              struct perf_evlist *evlist __maybe_unused,
 547                              struct record_opts *opts __maybe_unused)
 548 {
 549         return 0;
 550 }
 551
 552 #define perf_event__process_auxtrace_info               0
 553 #define perf_event__process_auxtrace                    0
 554 #define perf_event__process_auxtrace_error              0
 555
 556 static inline
 557 void perf_session__auxtrace_error_inc(struct perf_session *session
 558                                       __maybe_unused,
 559                                       union perf_event *event
 560                                       __maybe_unused)
 561 {
 562 }
 563
 564 static inline
 565 void events_stats__auxtrace_error_warn(const struct events_stats *stats
 566                                        __maybe_unused)
 567 {
 568 }
 569
 570 static inline
 571 int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
 572                             const char *str __maybe_unused,
 573                             int unset __maybe_unused)
 574 {
 575         pr_err("AUX area tracing not supported\n");
 576         return -EINVAL;
 577 }
 578
 579 static inline
 580 int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
 581                                     struct record_opts *opts __maybe_unused,
 582                                     const char *str)
 583 {
 584         if (!str)
 585                 return 0;
 586         pr_err("AUX area tracing not supported\n");
 587         return -EINVAL;
 588 }
 589
 590 static inline
 591 int auxtrace__process_event(struct perf_session *session __maybe_unused,
 592                             union perf_event *event __maybe_unused,
 593                             struct perf_sample *sample __maybe_unused,
 594                             struct perf_tool *tool __maybe_unused)
 595 {
 596         return 0;
 597 }
 598
 599 static inline
 600 int auxtrace__flush_events(struct perf_session *session __maybe_unused,
 601                            struct perf_tool *tool __maybe_unused)
 602 {
 603         return 0;
 604 }
 605
 606 static inline
 607 void auxtrace__free_events(struct perf_session *session __maybe_unused)
 608 {
 609 }
 610
 611 static inline
 612 void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
 613 {
 614 }
 615
 616 static inline
 617 void auxtrace__free(struct perf_session *session __maybe_unused)
 618 {
 619 }
 620
 621 static inline
 622 int auxtrace_index__write(int fd __maybe_unused,
 623                           struct list_head *head __maybe_unused)
 624 {
 625         return -EINVAL;
 626 }
 627
 628 static inline
 629 int auxtrace_index__process(int fd __maybe_unused,
 630                             u64 size __maybe_unused,
 631                             struct perf_session *session __maybe_unused,
 632                             bool needs_swap __maybe_unused)
 633 {
 634         return -EINVAL;
 635 }
 636
 637 static inline
 638 void auxtrace_index__free(struct list_head *head __maybe_unused)
 639 {
 640 }
 641
 642 int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
 643                         struct auxtrace_mmap_params *mp,
 644                         void *userpg, int fd);
 645 void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
 646 void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
 647                                 off_t auxtrace_offset,
 648                                 unsigned int auxtrace_pages,
 649                                 bool auxtrace_overwrite);
 650 void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
 651                                    struct perf_evlist *evlist, int idx,
 652                                    bool per_cpu);
 653
 654 #endif
 655
 656 #endif