/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * auxtrace.h: AUX area trace support
 * Copyright (c) 2013-2015, Intel Corporation.
 */

#ifndef __PERF_AUXTRACE_H
#define __PERF_AUXTRACE_H

#include <sys/types.h>
#include <stdio.h> // FILE
#include <linux/perf_event.h>
#include <linux/types.h>
#include <asm/barrier.h>
#include <perf/cpumap.h>

union perf_event;
struct perf_session;
struct evlist;
struct evsel;
struct perf_env;
struct perf_tool;
struct mmap;
struct perf_sample;
struct option;
struct record_opts;
struct perf_record_auxtrace_error;
struct perf_record_auxtrace_info;
struct events_stats;
struct perf_pmu;

enum auxtrace_error_type {
       PERF_AUXTRACE_ERROR_ITRACE  = 1,
       PERF_AUXTRACE_ERROR_MAX
};

/* Auxtrace records must have the same alignment as perf event records */
#define PERF_AUXTRACE_RECORD_ALIGNMENT 8

enum auxtrace_type {
        PERF_AUXTRACE_UNKNOWN,
        PERF_AUXTRACE_INTEL_PT,
        PERF_AUXTRACE_INTEL_BTS,
        PERF_AUXTRACE_CS_ETM,
        PERF_AUXTRACE_ARM_SPE,
        PERF_AUXTRACE_S390_CPUMSF,
        PERF_AUXTRACE_HISI_PTT,
        PERF_AUXTRACE_VPA_DTL,
};

enum itrace_period_type {
        PERF_ITRACE_PERIOD_INSTRUCTIONS,
        PERF_ITRACE_PERIOD_TICKS,
        PERF_ITRACE_PERIOD_NANOSECS,
};

#define AUXTRACE_ERR_FLG_OVERFLOW       (1 << ('o' - 'a'))
#define AUXTRACE_ERR_FLG_DATA_LOST      (1 << ('l' - 'a'))

#define AUXTRACE_LOG_FLG_ALL_PERF_EVTS  (1 << ('a' - 'a'))
#define AUXTRACE_LOG_FLG_ON_ERROR       (1 << ('e' - 'a'))
#define AUXTRACE_LOG_FLG_USE_STDOUT     (1 << ('o' - 'a'))

/**
 * struct itrace_synth_opts - AUX area tracing synthesis options.
 * @set: indicates whether or not options have been set
 * @default_no_sample: Default to no sampling.
 * @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
 * @cycles: whether to synthesize 'cycles' events
 *          (not fully accurate, since CYC packets are only emitted
 *          together with other events, such as branches)
 * @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
 * @other_events: whether to synthesize other events recorded due to the use of
 *                aux_output
 * @intr_events: whether to synthesize interrupt 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
 * @add_callchain: add callchain to existing event records
 * @thread_stack: feed branches to the thread_stack
 * @last_branch: add branch context to 'instruction' events
 * @add_last_branch: add branch context to existing event records
 * @approx_ipc: approximate IPC
 * @flc: whether to synthesize first level cache events
 * @llc: whether to synthesize last level cache events
 * @tlb: whether to synthesize TLB events
 * @remote_access: whether to synthesize remote access events
 * @mem: whether to synthesize memory events
 * @timeless_decoding: prefer "timeless" decoding i.e. ignore timestamps
 * @use_timestamp: use the timestamp trace as kernel time
 * @vm_time_correlation: perform VM Time Correlation
 * @vm_tm_corr_dry_run: VM Time Correlation dry-run
 * @vm_tm_corr_args:  VM Time Correlation implementation-specific arguments
 * @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
 * @ptime_range: time intervals to trace or NULL
 * @range_num: number of time intervals to trace
 * @error_plus_flags: flags to affect what errors are reported
 * @error_minus_flags: flags to affect what errors are reported
 * @log_plus_flags: flags to affect what is logged
 * @log_minus_flags: flags to affect what is logged
 * @quick: quicker (less detailed) decoding
 * @log_on_error_size: size of log to keep for outputting log only on errors
 */
struct itrace_synth_opts {
        bool                    set;
        bool                    default_no_sample;
        bool                    inject;
        bool                    instructions;
        bool                    cycles;
        bool                    branches;
        bool                    transactions;
        bool                    ptwrites;
        bool                    pwr_events;
        bool                    other_events;
        bool                    intr_events;
        bool                    errors;
        bool                    dont_decode;
        bool                    log;
        bool                    calls;
        bool                    returns;
        bool                    callchain;
        bool                    add_callchain;
        bool                    thread_stack;
        bool                    last_branch;
        bool                    add_last_branch;
        bool                    approx_ipc;
        bool                    flc;
        bool                    llc;
        bool                    tlb;
        bool                    remote_access;
        bool                    mem;
        bool                    timeless_decoding;
        bool                    use_timestamp;
        bool                    vm_time_correlation;
        bool                    vm_tm_corr_dry_run;
        char                    *vm_tm_corr_args;
        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 perf_time_interval *ptime_range;
        int                     range_num;
        unsigned int            error_plus_flags;
        unsigned int            error_minus_flags;
        unsigned int            log_plus_flags;
        unsigned int            log_minus_flags;
        unsigned int            quick;
        unsigned int            log_on_error_size;
};

/**
 * 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
 * @process_auxtrace_event: process a PERF_RECORD_AUXTRACE event
 * @queue_data: queue an AUX sample or PERF_RECORD_AUXTRACE event for later
 *              processing
 * @dump_auxtrace_sample: dump AUX area sample data
 * @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,
                             const struct perf_tool *tool);
        int (*process_auxtrace_event)(struct perf_session *session,
                                      union perf_event *event,
                                      const struct perf_tool *tool);
        int (*queue_data)(struct perf_session *session,
                          struct perf_sample *sample, union perf_event *event,
                          u64 data_offset);
        void (*dump_auxtrace_sample)(struct perf_session *session,
                                     struct perf_sample *sample);
        int (*flush_events)(struct perf_session *session,
                            const struct perf_tool *tool);
        void (*free_events)(struct perf_session *session);
        void (*free)(struct perf_session *session);
        bool (*evsel_is_auxtrace)(struct perf_session *session,
                                  struct evsel *evsel);
};

/**
 * 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;
        struct perf_cpu         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
 * @mmap_needed: set to %false for non-auxtrace events. This is needed because
 *               auxtrace mmapping is done in the same code path as non-auxtrace
 *               mmapping but not every evsel that needs non-auxtrace mmapping
 *               also needs auxtrace mmapping.
 * @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;
        bool            mmap_needed;
        struct perf_cpu 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
 * @alignment: alignment (if any) for AUX area data
 * @default_aux_sample_size: default sample size for --aux sample option
 * @pmu: associated pmu
 * @evlist: selected events list
 */
struct auxtrace_record {
        int (*recording_options)(struct auxtrace_record *itr,
                                 struct evlist *evlist,
                                 struct record_opts *opts);
        size_t (*info_priv_size)(struct auxtrace_record *itr,
                                 struct evlist *evlist);
        int (*info_fill)(struct auxtrace_record *itr,
                         struct perf_session *session,
                         struct perf_record_auxtrace_info *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;
        unsigned int default_aux_sample_size;
        struct evlist *evlist;
};

/**
 * 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;
};

struct auxtrace_cache;

u64 compat_auxtrace_mmap__read_head(struct auxtrace_mmap *mm);
int compat_auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail);

static inline u64 auxtrace_mmap__read_head(struct auxtrace_mmap *mm,
                                           int kernel_is_64_bit __maybe_unused)
{
        struct perf_event_mmap_page *pc = mm->userpg;
        u64 head;

#if BITS_PER_LONG == 32
        if (kernel_is_64_bit)
                return compat_auxtrace_mmap__read_head(mm);
#endif
        head = READ_ONCE(pc->aux_head);

        /* Ensure all reads are done after we read the head */
        smp_rmb();
        return head;
}

static inline int auxtrace_mmap__write_tail(struct auxtrace_mmap *mm, u64 tail,
                                            int kernel_is_64_bit __maybe_unused)
{
        struct perf_event_mmap_page *pc = mm->userpg;

#if BITS_PER_LONG == 32
        if (kernel_is_64_bit)
                return compat_auxtrace_mmap__write_tail(mm, tail);
#endif
        /* Ensure all reads are done before we write the tail out */
        smp_mb();
        WRITE_ONCE(pc->aux_tail, tail);
        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 evlist *evlist,
                                   struct evsel *evsel, int idx);

typedef int (*process_auxtrace_t)(const struct perf_tool *tool,
                                  struct mmap *map,
                                  union perf_event *event, void *data1,
                                  size_t len1, void *data2, size_t len2);

int auxtrace_mmap__read(struct mmap *map, struct auxtrace_record *itr,
                        struct perf_env *env, const struct perf_tool *tool,
                        process_auxtrace_t fn);

int auxtrace_mmap__read_snapshot(struct mmap *map,
                                 struct auxtrace_record *itr, struct perf_env *env,
                                 const struct perf_tool *tool, process_auxtrace_t fn,
                                 size_t snapshot_size);

int auxtrace_queues__init_nr(struct auxtrace_queues *queues, int nr_queues);
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);
struct auxtrace_queue *
auxtrace_queues__sample_queue(struct auxtrace_queues *queues,
                              struct perf_sample *sample,
                              struct perf_session *session);
int auxtrace_queues__add_sample(struct auxtrace_queues *queues,
                                struct perf_session *session,
                                struct perf_sample *sample, u64 data_offset,
                                u64 reference);
void auxtrace_queues__free(struct auxtrace_queues *queues);
int auxtrace_queues__process_index(struct auxtrace_queues *queues,
                                   struct perf_session *session);
int auxtrace_queue_data(struct perf_session *session, bool samples,
                        bool events);
struct auxtrace_buffer *auxtrace_buffer__next(struct auxtrace_queue *queue,
                                              struct auxtrace_buffer *buffer);
void *auxtrace_buffer__get_data_rw(struct auxtrace_buffer *buffer, int fd, bool rw);
static inline void *auxtrace_buffer__get_data(struct auxtrace_buffer *buffer, int fd)
{
        return auxtrace_buffer__get_data_rw(buffer, fd, false);
}
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__remove(struct auxtrace_cache *c, u32 key);
void *auxtrace_cache__lookup(struct auxtrace_cache *c, u32 key);

struct auxtrace_record *auxtrace_record__init(struct evlist *evlist,
                                              int *err);

int auxtrace_parse_snapshot_options(struct auxtrace_record *itr,
                                    struct record_opts *opts,
                                    const char *str);
int auxtrace_parse_sample_options(struct auxtrace_record *itr,
                                  struct evlist *evlist,
                                  struct record_opts *opts, const char *str);
int auxtrace_parse_aux_action(struct evlist *evlist);
int auxtrace_record__options(struct auxtrace_record *itr,
                             struct evlist *evlist,
                             struct record_opts *opts);
size_t auxtrace_record__info_priv_size(struct auxtrace_record *itr,
                                       struct evlist *evlist);
int auxtrace_record__info_fill(struct auxtrace_record *itr,
                               struct perf_session *session,
                               struct perf_record_auxtrace_info *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, bool on_exit);
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_record__read_finish(struct auxtrace_record *itr, int idx);

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_guest_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
                                int code, int cpu, pid_t pid, pid_t tid, u64 ip,
                                const char *msg, u64 timestamp,
                                pid_t machine_pid, int vcpu);
void auxtrace_synth_error(struct perf_record_auxtrace_error *auxtrace_error, int type,
                          int code, int cpu, pid_t pid, pid_t tid, u64 ip,
                          const char *msg, u64 timestamp);

int perf_event__process_auxtrace_info(const struct perf_tool *tool,
                                      struct perf_session *session,
                                      union perf_event *event);
s64 perf_event__process_auxtrace(const struct perf_tool *tool,
                                 struct perf_session *session,
                                 union perf_event *event);
int perf_event__process_auxtrace_error(const struct perf_tool *tool,
                                       struct perf_session *session,
                                       union perf_event *event);
int itrace_do_parse_synth_opts(struct itrace_synth_opts *synth_opts,
                               const char *str, int unset);
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,
                                    bool no_sample);

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 evlist *evlist);

int auxtrace__process_event(struct perf_session *session, union perf_event *event,
                            struct perf_sample *sample, const struct perf_tool *tool);
void auxtrace__dump_auxtrace_sample(struct perf_session *session,
                                    struct perf_sample *sample);
int auxtrace__flush_events(struct perf_session *session, const struct perf_tool *tool);
void auxtrace__free_events(struct perf_session *session);
void auxtrace__free(struct perf_session *session);
bool auxtrace__evsel_is_auxtrace(struct perf_session *session,
                                 struct evsel *evsel);
u64 auxtrace_synth_id_range_start(struct evsel *evsel);

#define ITRACE_HELP \
"                               i[period]:              synthesize instructions events\n" \
"                               y[period]:              synthesize cycles events (same period as i)\n" \
"                               b:                      synthesize branches events\n" \
"                               c:                      synthesize branches events (calls only)\n"      \
"                               r:                      synthesize branches events (returns only)\n" \
"                               x:                      synthesize transactions events\n"               \
"                               w:                      synthesize ptwrite events\n"            \
"                               p:                      synthesize power events\n"                      \
"                               o:                      synthesize other events recorded due to the use\n" \
"                                                       of aux-output (refer to perf record)\n" \
"                               I:                      synthesize interrupt or similar (asynchronous) events\n" \
"                                                       (e.g. Intel PT Event Trace)\n" \
"                               e[flags]:               synthesize error events\n" \
"                                                       each flag must be preceded by + or -\n" \
"                                                       error flags are: o (overflow)\n" \
"                                                                        l (data lost)\n" \
"                               d[flags]:               create a debug log\n" \
"                                                       each flag must be preceded by + or -\n" \
"                                                       log flags are: a (all perf events)\n" \
"                                                                      o (output to stdout)\n" \
"                               f:                      synthesize first level cache events\n" \
"                               m:                      synthesize last level cache events\n" \
"                               t:                      synthesize TLB events\n" \
"                               a:                      synthesize remote access events\n" \
"                               g[len]:                 synthesize a call chain (use with i or x)\n" \
"                               G[len]:                 synthesize a call chain on existing event records\n" \
"                               l[len]:                 synthesize last branch entries (use with i or x)\n" \
"                               L[len]:                 synthesize last branch entries on existing event records\n" \
"                               sNUMBER:                skip initial number of events\n"                \
"                               q:                      quicker (less detailed) decoding\n" \
"                               A:                      approximate IPC\n" \
"                               Z:                      prefer to ignore timestamps (so-called \"timeless\" decoding)\n" \
"                               T:                      use the timestamp trace as kernel time\n" \
"                               PERIOD[ns|us|ms|i|t]:   specify period to sample stream\n" \
"                               concatenate multiple options. Default is iybxwpe or cewp\n"

static inline
void itrace_synth_opts__set_time_range(struct itrace_synth_opts *opts,
                                       struct perf_time_interval *ptime_range,
                                       int range_num)
{
        opts->ptime_range = ptime_range;
        opts->range_num = range_num;
}

static inline
void itrace_synth_opts__clear_time_range(struct itrace_synth_opts *opts)
{
        opts->ptime_range = NULL;
        opts->range_num = 0;
}

#endif