text: /*
   * auxtrace.h: AUX area trace support
   * Copyright (c) 2013-2015, Intel Corporation.
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms and conditions of the GNU General Public License,
   * version 2, as published by the Free Software Foundation.
   *
   * This program is distributed in the hope it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   */
  
  #ifndef __PERF_AUXTRACE_H
  #define __PERF_AUXTRACE_H
  
  #include <sys/types.h>
  #include <errno.h>
  #include <stdbool.h>
  #include <stddef.h>
  #include <linux/list.h>
  #include <linux/perf_event.h>
  #include <linux/types.h>
  
  #include "../perf.h"
  #include "event.h"
  #include "session.h"
  #include "debug.h"
  
  union perf_event;
  struct perf_session;
  struct perf_evlist;
  struct perf_tool;
  struct option;
  struct record_opts;
  struct auxtrace_info_event;
  struct events_stats;
  
  enum auxtrace_type {
  	PERF_AUXTRACE_UNKNOWN,
  	PERF_AUXTRACE_INTEL_PT,
  	PERF_AUXTRACE_INTEL_BTS,
  	PERF_AUXTRACE_CS_ETM,
  };
  
  enum itrace_period_type {
  	PERF_ITRACE_PERIOD_INSTRUCTIONS,
  	PERF_ITRACE_PERIOD_TICKS,
  	PERF_ITRACE_PERIOD_NANOSECS,
  };
  
  /**
   * struct itrace_synth_opts - AUX area tracing synthesis options.
   * @set: indicates whether or not options have been set
   * @inject: indicates the event (not just the sample) must be fully synthesized
   *          because 'perf inject' will write it out
   * @instructions: whether to synthesize 'instructions' events
   * @branches: whether to synthesize 'branches' events
   * @transactions: whether to synthesize events for transactions
   * @ptwrites: whether to synthesize events for ptwrites
   * @pwr_events: whether to synthesize power events
   * @errors: whether to synthesize decoder error events
   * @dont_decode: whether to skip decoding entirely
   * @log: write a decoding log
   * @calls: limit branch samples to calls (can be combined with @returns)
   * @returns: limit branch samples to returns (can be combined with @calls)
   * @callchain: add callchain to 'instructions' events
   * @thread_stack: feed branches to the thread_stack
   * @last_branch: add branch context to 'instruction' events
   * @callchain_sz: maximum callchain size
   * @last_branch_sz: branch context size
   * @period: 'instructions' events period
   * @period_type: 'instructions' events period type
   * @initial_skip: skip N events at the beginning.
   * @cpu_bitmap: CPUs for which to synthesize events, or NULL for all
   */
  struct itrace_synth_opts {
  	bool			set;
  	bool			inject;
  	bool			instructions;
  	bool			branches;
  	bool			transactions;
  	bool			ptwrites;
  	bool			pwr_events;
  	bool			errors;
  	bool			dont_decode;
  	bool			log;
  	bool			calls;
  	bool			returns;
  	bool			callchain;
  	bool			thread_stack;
  	bool			last_branch;
  	unsigned int		callchain_sz;
  	unsigned int		last_branch_sz;
  	unsigned long long	period;
  	enum itrace_period_type	period_type;
  	unsigned long		initial_skip;
  	unsigned long		*cpu_bitmap;
  };
  
  /**
   * struct auxtrace_index_entry - indexes a AUX area tracing event within a
   *                               perf.data file.
   * @file_offset: offset within the perf.data file
   * @sz: size of the event
   */
  struct auxtrace_index_entry {
  	u64			file_offset;
  	u64			sz;
  };
  
  #define PERF_AUXTRACE_INDEX_ENTRY_COUNT 256
  
  /**
   * struct auxtrace_index - index of AUX area tracing events within a perf.data
   *                         file.
   * @list: linking a number of arrays of entries
   * @nr: number of entries
   * @entries: array of entries
   */
  struct auxtrace_index {
  	struct list_head	list;
  	size_t			nr;
  	struct auxtrace_index_entry entries[PERF_AUXTRACE_INDEX_ENTRY_COUNT];
  };
  
  /**
   * struct auxtrace - session callbacks to allow AUX area data decoding.
   * @process_event: lets the decoder see all session events
   * @flush_events: process any remaining data
   * @free_events: free resources associated with event processing
   * @free: free resources associated with the session
   */
  struct auxtrace {
  	int (*process_event)(struct perf_session *session,
  			     union perf_event *event,
  			     struct perf_sample *sample,
  			     struct perf_tool *tool);
  	int (*process_auxtrace_event)(struct perf_session *session,
  				      union perf_event *event,
  				      struct perf_tool *tool);
  	int (*flush_events)(struct perf_session *session,
  			    struct perf_tool *tool);
  	void (*free_events)(struct perf_session *session);
  	void (*free)(struct perf_session *session);
  };
  
  /**
   * struct auxtrace_buffer - a buffer containing AUX area tracing data.
   * @list: buffers are queued in a list held by struct auxtrace_queue
   * @size: size of the buffer in bytes
   * @pid: in per-thread mode, the pid this buffer is associated with
   * @tid: in per-thread mode, the tid this buffer is associated with
   * @cpu: in per-cpu mode, the cpu this buffer is associated with
   * @data: actual buffer data (can be null if the data has not been loaded)
   * @data_offset: file offset at which the buffer can be read
   * @mmap_addr: mmap address at which the buffer can be read
   * @mmap_size: size of the mmap at @mmap_addr
   * @data_needs_freeing: @data was malloc'd so free it when it is no longer
   *                      needed
   * @consecutive: the original data was split up and this buffer is consecutive
   *               to the previous buffer
   * @offset: offset as determined by aux_head / aux_tail members of struct
   *          perf_event_mmap_page
   * @reference: an implementation-specific reference determined when the data is
   *             recorded
   * @buffer_nr: used to number each buffer
   * @use_size: implementation actually only uses this number of bytes
   * @use_data: implementation actually only uses data starting at this address
   */
  struct auxtrace_buffer {
  	struct list_head	list;
  	size_t			size;
  	pid_t			pid;
  	pid_t			tid;
  	int			cpu;
  	void			*data;
  	off_t			data_offset;
  	void			*mmap_addr;
  	size_t			mmap_size;
  	bool			data_needs_freeing;
  	bool			consecutive;
  	u64			offset;
  	u64			reference;
  	u64			buffer_nr;
  	size_t			use_size;
  	void			*use_data;
  };
  
  /**
   * struct auxtrace_queue - a queue of AUX area tracing data buffers.
   * @head: head of buffer list
   * @tid: in per-thread mode, the tid this queue is associated with
   * @cpu: in per-cpu mode, the cpu this queue is associated with
   * @set: %true once this queue has been dedicated to a specific thread or cpu
   * @priv: implementation-specific data
   */
  struct auxtrace_queue {
  	struct list_head	head;
  	pid_t			tid;
  	int			cpu;
  	bool			set;
  	void			*priv;
  };
  
  /**
   * struct auxtrace_queues - an array of AUX area tracing queues.
   * @queue_array: array of queues
   * @nr_queues: number of queues
   * @new_data: set whenever new data is queued
   * @populated: queues have been fully populated using the auxtrace_index
   * @next_buffer_nr: used to number each buffer
   */
  struct auxtrace_queues {
  	struct auxtrace_queue	*queue_array;
  	unsigned int		nr_queues;
  	bool			new_data;
  	bool			populated;
  	u64			next_buffer_nr;
  };
  
  /**
   * struct auxtrace_heap_item - element of struct auxtrace_heap.
   * @queue_nr: queue number
   * @ordinal: value used for sorting (lowest ordinal is top of the heap) expected
   *           to be a timestamp
   */
  struct auxtrace_heap_item {
  	unsigned int		queue_nr;
  	u64			ordinal;
  };
  
  /**
   * struct auxtrace_heap - a heap suitable for sorting AUX area tracing queues.
   * @heap_array: the heap
   * @heap_cnt: the number of elements in the heap
   * @heap_sz: maximum number of elements (grows as needed)
   */
  struct auxtrace_heap {
  	struct auxtrace_heap_item	*heap_array;
  	unsigned int		heap_cnt;
  	unsigned int		heap_sz;
  };
  
  /**
   * struct auxtrace_mmap - records an mmap of the auxtrace buffer.
   * @base: address of mapped area
   * @userpg: pointer to buffer's perf_event_mmap_page
   * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
   * @len: size of mapped area
   * @prev: previous aux_head
   * @idx: index of this mmap
   * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
   *       mmap) otherwise %0
   * @cpu: cpu number for a per-cpu mmap otherwise %-1
   */
  struct auxtrace_mmap {
  	void		*base;
  	void		*userpg;
  	size_t		mask;
  	size_t		len;
  	u64		prev;
  	int		idx;
  	pid_t		tid;
  	int		cpu;
  };
  
  /**
   * struct auxtrace_mmap_params - parameters to set up struct auxtrace_mmap.
   * @mask: %0 if @len is not a power of two, otherwise (@len - %1)
   * @offset: file offset of mapped area
   * @len: size of mapped area
   * @prot: mmap memory protection
   * @idx: index of this mmap
   * @tid: tid for a per-thread mmap (also set if there is only 1 tid on a per-cpu
   *       mmap) otherwise %0
   * @cpu: cpu number for a per-cpu mmap otherwise %-1
   */
  struct auxtrace_mmap_params {
  	size_t		mask;
  	off_t		offset;
  	size_t		len;
  	int		prot;
  	int		idx;
  	pid_t		tid;
  	int		cpu;
  };
  
  /**
   * struct auxtrace_record - callbacks for recording AUX area data.
   * @recording_options: validate and process recording options
   * @info_priv_size: return the size of the private data in auxtrace_info_event
   * @info_fill: fill-in the private data in auxtrace_info_event
   * @free: free this auxtrace record structure
   * @snapshot_start: starting a snapshot
   * @snapshot_finish: finishing a snapshot
   * @find_snapshot: find data to snapshot within auxtrace mmap
   * @parse_snapshot_options: parse snapshot options
   * @reference: provide a 64-bit reference number for auxtrace_event
   * @read_finish: called after reading from an auxtrace mmap
   */
  struct auxtrace_record {
  	int (*recording_options)(struct auxtrace_record *itr,
  				 struct perf_evlist *evlist,
  				 struct record_opts *opts);
  	size_t (*info_priv_size)(struct auxtrace_record *itr,
  				 struct perf_evlist *evlist);
  	int (*info_fill)(struct auxtrace_record *itr,
  			 struct perf_session *session,
  			 struct auxtrace_info_event *auxtrace_info,
  			 size_t priv_size);
  	void (*free)(struct auxtrace_record *itr);
  	int (*snapshot_start)(struct auxtrace_record *itr);
  	int (*snapshot_finish)(struct auxtrace_record *itr);
  	int (*find_snapshot)(struct auxtrace_record *itr, int idx,
  			     struct auxtrace_mmap *mm, unsigned char *data,
  			     u64 *head, u64 *old);
  	int (*parse_snapshot_options)(struct auxtrace_record *itr,
  				      struct record_opts *opts,
  				      const char *str);
  	u64 (*reference)(struct auxtrace_record *itr);
  	int (*read_finish)(struct auxtrace_record *itr, int idx);
  	unsigned int alignment;
  };
  
  /**
   * struct addr_filter - address filter.
   * @list: list node
   * @range: true if it is a range filter
   * @start: true if action is 'filter' or 'start'
   * @action: 'filter', 'start' or 'stop' ('tracestop' is accepted but converted
   *          to 'stop')
   * @sym_from: symbol name for the filter address
   * @sym_to: symbol name that determines the filter size
   * @sym_from_idx: selects n'th from symbols with the same name (0 means global
   *                and less than 0 means symbol must be unique)
   * @sym_to_idx: same as @sym_from_idx but for @sym_to
   * @addr: filter address
   * @size: filter region size (for range filters)
   * @filename: DSO file name or NULL for the kernel
   * @str: allocated string that contains the other string members
   */
  struct addr_filter {
  	struct list_head	list;
  	bool			range;
  	bool			start;
  	const char		*action;
  	const char		*sym_from;
  	const char		*sym_to;
  	int			sym_from_idx;
  	int			sym_to_idx;
  	u64			addr;
  	u64			size;
  	const char		*filename;
  	char			*str;
  };
  
  /**
   * struct addr_filters - list of address filters.
   * @head: list of address filters
   * @cnt: number of address filters
   */
  struct addr_filters {
  	struct list_head	head;
  	int			cnt;
  };
  
  #ifdef HAVE_AUXTRACE_SUPPORT
  
  /*
   * In snapshot mode the mmapped page is read-only which makes using
   * __sync_val_compare_and_swap() problematic.  However, snapshot mode expects
   * the buffer is not updated while the snapshot is made (e.g. Intel PT disables
   * the event) so there is not a race anyway.
   */
  static inline u64 auxtrace_mmap__read_snapshot_head(struct auxtrace_mmap *mm)
  {
  	struct perf_event_mmap_page *pc = mm->userpg;
  	u64 head = READ_ONCE(pc->aux_head);
  
  	/* Ensure all reads are done after we read the head */
  	rmb();
  	return head;
  }
  
  static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm)
  {
  	struct perf_event_mmap_page *pc = mm->userpg;
  #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
  	u64 head = READ_ONCE(pc->aux_head);
  #else
  	u64 head = __sync_val_compare_and_swap(&pc->aux_head, 0, 0);
  #endif
  
  	/* Ensure all reads are done after we read the head */
  	rmb();
  	return head;
  }
  
  static inline void auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail)
  {
  	struct perf_event_mmap_page *pc = mm->userpg;
  #if BITS_PER_LONG != 64 && defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
  	u64 old_tail;
  #endif
  
  	/* Ensure all reads are done before we write the tail out */
  	mb();
  #if BITS_PER_LONG == 64 || !defined(HAVE_SYNC_COMPARE_AND_SWAP_SUPPORT)
  	pc->aux_tail = tail;
  #else
  	do {
  		old_tail = __sync_val_compare_and_swap(&pc->aux_tail, 0, 0);
  	} while (!__sync_bool_compare_and_swap(&pc->aux_tail, old_tail, tail));
  #endif
  }
  
  int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
  			struct auxtrace_mmap_params *mp,
  			void *userpg, int fd);
  void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
  void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
  				off_t auxtrace_offset,
  				unsigned int auxtrace_pages,
  				bool auxtrace_overwrite);
  void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
  				   struct perf_evlist *evlist, int idx,
  				   bool per_cpu);
  
  typedef int (*process_auxtrace_t)(struct perf_tool *tool,
  				  union perf_event *event, void *data1,
  				  size_t len1, void *data2, size_t len2);
  
  int auxtrace_mmap__read(struct auxtrace_mmap *mm, struct auxtrace_record *itr,
  			struct perf_tool *tool, process_auxtrace_t fn);
  
  int auxtrace_mmap__read_snapshot(struct auxtrace_mmap *mm,
  				 struct auxtrace_record *itr,
  				 struct perf_tool *tool, process_auxtrace_t fn,
  				 size_t snapshot_size);
  
  int auxtrace_queues__init(struct auxtrace_queues *queues);
  int auxtrace_queues__add_event(struct auxtrace_queues *queues,
  			       struct perf_session *session,
  			       union perf_event *event, off_t data_offset,
  			       struct auxtrace_buffer **buffer_ptr);
  void auxtrace_queues__free(struct auxtrace_queues *queues);
  int auxtrace_queues__process_index(struct auxtrace_queues *queues,
  				   struct perf_session *session);
  struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
  					      struct auxtrace_buffer *buffer);
  void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd);
  void auxtrace_buffer__put_data(struct auxtrace_buffer *buffer);
  void auxtrace_buffer__drop_data(struct auxtrace_buffer *buffer);
  void auxtrace_buffer__free(struct auxtrace_buffer *buffer);
  
  int auxtrace_heap__add(struct auxtrace_heap *heap, unsigned int queue_nr,
  		       u64 ordinal);
  void auxtrace_heap__pop(struct auxtrace_heap *heap);
  void auxtrace_heap__free(struct auxtrace_heap *heap);
  
  struct auxtrace_cache_entry {
  	struct hlist_node hash;
  	u32 key;
  };
  
  struct auxtrace_cache *auxtrace_cache__new(unsigned int bits, size_t entry_size,
  					   unsigned int limit_percent);
  void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache);
  void *auxtrace_cache__alloc_entry(struct auxtrace_cache *c);
  void auxtrace_cache__free_entry(struct auxtrace_cache *c, void *entry);
  int auxtrace_cache__add(struct auxtrace_cache *c, u32 key,
  			struct auxtrace_cache_entry *entry);
  void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);
  
  struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist,
  					      int *err);
  
  int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
  				    struct record_opts *opts,
  				    const char *str);
  int auxtrace_record__options(struct auxtrace_record *itr,
  			     struct perf_evlist *evlist,
  			     struct record_opts *opts);
  size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
  				       struct perf_evlist *evlist);
  int auxtrace_record__info_fill(struct auxtrace_record *itr,
  			       struct perf_session *session,
  			       struct auxtrace_info_event *auxtrace_info,
  			       size_t priv_size);
  void auxtrace_record__free(struct auxtrace_record *itr);
  int auxtrace_record__snapshot_start(struct auxtrace_record *itr);
  int auxtrace_record__snapshot_finish(struct auxtrace_record *itr);
  int auxtrace_record__find_snapshot(struct auxtrace_record *itr, int idx,
  				   struct auxtrace_mmap *mm,
  				   unsigned char *data, u64 *head, u64 *old);
  u64 auxtrace_record__reference(struct auxtrace_record *itr);
  
  int auxtrace_index__auxtrace_event(struct list_head *head, union perf_event *event,
  				   off_t file_offset);
  int auxtrace_index__write(int fd, struct list_head *head);
  int auxtrace_index__process(int fd, u64 size, struct perf_session *session,
  			    bool needs_swap);
  void auxtrace_index__free(struct list_head *head);
  
  void auxtrace_synth_error(struct auxtrace_error_event *auxtrace_error, int type,
  			  int code, int cpu, pid_t pid, pid_t tid, u64 ip,
  			  const char *msg);
  
  int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr,
  					 struct perf_tool *tool,
  					 struct perf_session *session,
  					 perf_event__handler_t process);
  int perf_event__process_auxtrace_info(struct perf_tool *tool,
  				      union perf_event *event,
  				      struct perf_session *session);
  s64 perf_event__process_auxtrace(struct perf_tool *tool,
  				 union perf_event *event,
  				 struct perf_session *session);
  int perf_event__process_auxtrace_error(struct perf_tool *tool,
  				       union perf_event *event,
  				       struct perf_session *session);
  int itrace_parse_synth_opts(const struct option *opt, const char *str,
  			    int unset);
  void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
  
  size_t perf_event__fprintf_auxtrace_error(union perf_event *event, FILE *fp);
  void perf_session__auxtrace_error_inc(struct perf_session *session,
  				      union perf_event *event);
  void events_stats__auxtrace_error_warn(const struct events_stats *stats);
  
  void addr_filters__init(struct addr_filters *filts);
  void addr_filters__exit(struct addr_filters *filts);
  int addr_filters__parse_bare_filter(struct addr_filters *filts,
  				    const char *filter);
  int auxtrace_parse_filters(struct perf_evlist *evlist);
  
  static inline int auxtrace__process_event(struct perf_session *session,
  					  union perf_event *event,
  					  struct perf_sample *sample,
  					  struct perf_tool *tool)
  {
  	if (!session->auxtrace)
  		return 0;
  
  	return session->auxtrace->process_event(session, event, sample, tool);
  }
  
  static inline int auxtrace__flush_events(struct perf_session *session,
  					 struct perf_tool *tool)
  {
  	if (!session->auxtrace)
  		return 0;
  
  	return session->auxtrace->flush_events(session, tool);
  }
  
  static inline void auxtrace__free_events(struct perf_session *session)
  {
  	if (!session->auxtrace)
  		return;
  
  	return session->auxtrace->free_events(session);
  }
  
  static inline void auxtrace__free(struct perf_session *session)
  {
  	if (!session->auxtrace)
  		return;
  
  	return session->auxtrace->free(session);
  }
  
  #else
  
  static inline struct auxtrace_record *
  auxtrace_record__init(struct perf_evlist *evlist __maybe_unused,
  		      int *err)
  {
  	*err = 0;
  	return NULL;
  }
  
  static inline
  void auxtrace_record__free(struct auxtrace_record *itr __maybe_unused)
  {
  }
  
  static inline int
  perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
  				     struct perf_tool *tool __maybe_unused,
  				     struct perf_session *session __maybe_unused,
  				     perf_event__handler_t process __maybe_unused)
  {
  	return -EINVAL;
  }
  
  static inline
  int auxtrace_record__options(struct auxtrace_record *itr __maybe_unused,
  			     struct perf_evlist *evlist __maybe_unused,
  			     struct record_opts *opts __maybe_unused)
  {
  	return 0;
  }
  
  #define perf_event__process_auxtrace_info		0
  #define perf_event__process_auxtrace			0
  #define perf_event__process_auxtrace_error		0
  
  static inline
  void perf_session__auxtrace_error_inc(struct perf_session *session
  				      __maybe_unused,
  				      union perf_event *event
  				      __maybe_unused)
  {
  }
  
  static inline
  void events_stats__auxtrace_error_warn(const struct events_stats *stats
  				       __maybe_unused)
  {
  }
  
  static inline
  int itrace_parse_synth_opts(const struct option *opt __maybe_unused,
  			    const char *str __maybe_unused,
  			    int unset __maybe_unused)
  {
  	pr_err("AUX area tracing not supported\n");
  	return -EINVAL;
  }
  
  static inline
  int auxtrace_parse_snapshot_options(struct auxtrace_record *itr __maybe_unused,
  				    struct record_opts *opts __maybe_unused,
  				    const char *str)
  {
  	if (!str)
  		return 0;
  	pr_err("AUX area tracing not supported\n");
  	return -EINVAL;
  }
  
  static inline
  int auxtrace__process_event(struct perf_session *session __maybe_unused,
  			    union perf_event *event __maybe_unused,
  			    struct perf_sample *sample __maybe_unused,
  			    struct perf_tool *tool __maybe_unused)
  {
  	return 0;
  }
  
  static inline
  int auxtrace__flush_events(struct perf_session *session __maybe_unused,
  			   struct perf_tool *tool __maybe_unused)
  {
  	return 0;
  }
  
  static inline
  void auxtrace__free_events(struct perf_session *session __maybe_unused)
  {
  }
  
  static inline
  void auxtrace_cache__free(struct auxtrace_cache *auxtrace_cache __maybe_unused)
  {
  }
  
  static inline
  void auxtrace__free(struct perf_session *session __maybe_unused)
  {
  }
  
  static inline
  int auxtrace_index__write(int fd __maybe_unused,
  			  struct list_head *head __maybe_unused)
  {
  	return -EINVAL;
  }
  
  static inline
  int auxtrace_index__process(int fd __maybe_unused,
  			    u64 size __maybe_unused,
  			    struct perf_session *session __maybe_unused,
  			    bool needs_swap __maybe_unused)
  {
  	return -EINVAL;
  }
  
  static inline
  void auxtrace_index__free(struct list_head *head __maybe_unused)
  {
  }
  
  static inline
  int auxtrace_parse_filters(struct perf_evlist *evlist __maybe_unused)
  {
  	return 0;
  }
  
  int auxtrace_mmap__mmap(struct auxtrace_mmap *mm,
  			struct auxtrace_mmap_params *mp,
  			void *userpg, int fd);
  void auxtrace_mmap__munmap(struct auxtrace_mmap *mm);
  void auxtrace_mmap_params__init(struct auxtrace_mmap_params *mp,
  				off_t auxtrace_offset,
  				unsigned int auxtrace_pages,
  				bool auxtrace_overwrite);
  void auxtrace_mmap_params__set_idx(struct auxtrace_mmap_params *mp,
  				   struct perf_evlist *evlist, int idx,
  				   bool per_cpu);
  
  #endif
  
  #endif
  