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