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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __PERF_SESSION_H
3#define __PERF_SESSION_H
4
5#include "trace-event.h"
6#include "event.h"
7#include "header.h"
8#include "machine.h"
9#include "data.h"
10#include "ordered-events.h"
11#include "util/compress.h"
12#include <linux/kernel.h>
13#include <linux/rbtree.h>
14#include <linux/perf_event.h>
15
16struct ip_callchain;
17struct symbol;
18struct thread;
19
20struct auxtrace;
21struct itrace_synth_opts;
22
23struct decomp_data {
24 struct decomp *decomp;
25 struct decomp *decomp_last;
26 struct zstd_data *zstd_decomp;
27};
28
29/**
30 * struct perf_session- A Perf session holds the main state when the program is
31 * working with live perf events or reading data from an input file.
32 *
33 * The rough organization of a perf_session is:
34 * ```
35 * +--------------+ +-----------+ +------------+
36 * | Session |1..* ----->| Machine |1..* ----->| Thread |
37 * +--------------+ +-----------+ +------------+
38 * ```
39 */
40struct perf_session {
41 /**
42 * @header: The read version of a perf_file_header, or captures global
43 * information from a live session.
44 */
45 struct perf_header header;
46 /** @machines: Machines within the session a host and 0 or more guests. */
47 struct machines machines;
48 /** @evlist: List of evsels/events of the session. */
49 struct evlist *evlist;
50 /** @auxtrace: callbacks to allow AUX area data decoding. */
51 const struct auxtrace *auxtrace;
52 /** @itrace_synth_opts: AUX area tracing synthesis options. */
53 struct itrace_synth_opts *itrace_synth_opts;
54 /** @auxtrace_index: index of AUX area tracing events within a perf.data file. */
55 struct list_head auxtrace_index;
56#ifdef HAVE_LIBTRACEEVENT
57 /** @tevent: handles for libtraceevent and plugins. */
58 struct trace_event tevent;
59#endif
60 /** @time_conv: Holds contents of last PERF_RECORD_TIME_CONV event. */
61 struct perf_record_time_conv time_conv;
62 /** @trace_event_repipe: When set causes read trace events to be written to stdout. */
63 bool trace_event_repipe;
64 /**
65 * @one_mmap: The reader will use a single mmap by default. There may be
66 * multiple data files in particular for aux events. If this is true
67 * then the single big mmap for the data file can be assumed.
68 */
69 bool one_mmap;
70 /** @one_mmap_addr: Address of initial perf data file reader mmap. */
71 void *one_mmap_addr;
72 /** @one_mmap_offset: File offset in perf.data file when mapped. */
73 u64 one_mmap_offset;
74 /** @ordered_events: Used to turn unordered events into ordered ones. */
75 struct ordered_events ordered_events;
76 /** @data: Optional perf data file being read from. */
77 struct perf_data *data;
78 /** @tool: callbacks for event handling. */
79 const struct perf_tool *tool;
80 /**
81 * @bytes_transferred: Used by perf record to count written bytes before
82 * compression.
83 */
84 u64 bytes_transferred;
85 /**
86 * @bytes_compressed: Used by perf record to count written bytes after
87 * compression.
88 */
89 u64 bytes_compressed;
90 /** @zstd_data: Owner of global compression state, buffers, etc. */
91 struct zstd_data zstd_data;
92 struct decomp_data decomp_data;
93 struct decomp_data *active_decomp;
94};
95
96struct decomp {
97 struct decomp *next;
98 u64 file_pos;
99 const char *file_path;
100 size_t mmap_len;
101 u64 head;
102 size_t size;
103 char data[];
104};
105
106struct perf_tool;
107
108struct perf_session *__perf_session__new(struct perf_data *data,
109 struct perf_tool *tool,
110 bool trace_event_repipe);
111
112static inline struct perf_session *perf_session__new(struct perf_data *data,
113 struct perf_tool *tool)
114{
115 return __perf_session__new(data, tool, /*trace_event_repipe=*/false);
116}
117
118void perf_session__delete(struct perf_session *session);
119
120void perf_event_header__bswap(struct perf_event_header *hdr);
121
122int perf_session__peek_event(struct perf_session *session, off_t file_offset,
123 void *buf, size_t buf_sz,
124 union perf_event **event_ptr,
125 struct perf_sample *sample);
126typedef int (*peek_events_cb_t)(struct perf_session *session,
127 union perf_event *event, u64 offset,
128 void *data);
129int perf_session__peek_events(struct perf_session *session, u64 offset,
130 u64 size, peek_events_cb_t cb, void *data);
131
132int perf_session__process_events(struct perf_session *session);
133
134int perf_session__queue_event(struct perf_session *s, union perf_event *event,
135 u64 timestamp, u64 file_offset, const char *file_path);
136
137int perf_session__resolve_callchain(struct perf_session *session,
138 struct evsel *evsel,
139 struct thread *thread,
140 struct ip_callchain *chain,
141 struct symbol **parent);
142
143bool perf_session__has_traces(struct perf_session *session, const char *msg);
144
145void perf_event__attr_swap(struct perf_event_attr *attr);
146
147int perf_session__create_kernel_maps(struct perf_session *session);
148
149void perf_session__set_id_hdr_size(struct perf_session *session);
150
151static inline
152struct machine *perf_session__find_machine(struct perf_session *session, pid_t pid)
153{
154 return machines__find(&session->machines, pid);
155}
156
157static inline
158struct machine *perf_session__findnew_machine(struct perf_session *session, pid_t pid)
159{
160 return machines__findnew(&session->machines, pid);
161}
162
163struct thread *perf_session__findnew(struct perf_session *session, pid_t pid);
164int perf_session__register_idle_thread(struct perf_session *session);
165
166size_t perf_session__fprintf(struct perf_session *session, FILE *fp);
167
168size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp);
169
170size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
171 bool (fn)(struct dso *dso, int parm), int parm);
172
173size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp);
174
175void perf_session__dump_kmaps(struct perf_session *session);
176
177struct evsel *perf_session__find_first_evtype(struct perf_session *session,
178 unsigned int type);
179
180int perf_session__cpu_bitmap(struct perf_session *session,
181 const char *cpu_list, unsigned long *cpu_bitmap);
182
183void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
184
185struct evsel_str_handler;
186
187#define perf_session__set_tracepoints_handlers(session, array) \
188 __evlist__set_tracepoints_handlers(session->evlist, array, ARRAY_SIZE(array))
189
190extern volatile int session_done;
191
192#define session_done() READ_ONCE(session_done)
193
194int perf_session__deliver_synth_event(struct perf_session *session,
195 union perf_event *event,
196 struct perf_sample *sample);
197int perf_session__deliver_synth_attr_event(struct perf_session *session,
198 const struct perf_event_attr *attr,
199 u64 id);
200
201int perf_session__dsos_hit_all(struct perf_session *session);
202
203int perf_event__process_id_index(struct perf_session *session,
204 union perf_event *event);
205
206int perf_event__process_finished_round(const struct perf_tool *tool,
207 union perf_event *event,
208 struct ordered_events *oe);
209
210#endif /* __PERF_SESSION_H */
1#ifndef __PERF_SESSION_H
2#define __PERF_SESSION_H
3
4#include "hist.h"
5#include "event.h"
6#include "header.h"
7#include "symbol.h"
8#include "thread.h"
9#include <linux/rbtree.h>
10#include "../../../include/linux/perf_event.h"
11
12struct sample_queue;
13struct ip_callchain;
14struct thread;
15
16struct ordered_samples {
17 u64 last_flush;
18 u64 next_flush;
19 u64 max_timestamp;
20 struct list_head samples;
21 struct list_head sample_cache;
22 struct list_head to_free;
23 struct sample_queue *sample_buffer;
24 struct sample_queue *last_sample;
25 int sample_buffer_idx;
26 unsigned int nr_samples;
27};
28
29struct perf_session {
30 struct perf_header header;
31 unsigned long size;
32 unsigned long mmap_window;
33 struct machine host_machine;
34 struct rb_root machines;
35 struct perf_evlist *evlist;
36 /*
37 * FIXME: Need to split this up further, we need global
38 * stats + per event stats. 'perf diff' also needs
39 * to properly support multiple events in a single
40 * perf.data file.
41 */
42 struct hists hists;
43 u64 sample_type;
44 int sample_size;
45 int fd;
46 bool fd_pipe;
47 bool repipe;
48 bool sample_id_all;
49 u16 id_hdr_size;
50 int cwdlen;
51 char *cwd;
52 struct ordered_samples ordered_samples;
53 char filename[1];
54};
55
56struct perf_tool;
57
58struct perf_session *perf_session__new(const char *filename, int mode,
59 bool force, bool repipe,
60 struct perf_tool *tool);
61void perf_session__delete(struct perf_session *self);
62
63void perf_event_header__bswap(struct perf_event_header *self);
64
65int __perf_session__process_events(struct perf_session *self,
66 u64 data_offset, u64 data_size, u64 size,
67 struct perf_tool *tool);
68int perf_session__process_events(struct perf_session *self,
69 struct perf_tool *tool);
70
71int perf_session__resolve_callchain(struct perf_session *self, struct perf_evsel *evsel,
72 struct thread *thread,
73 struct ip_callchain *chain,
74 struct symbol **parent);
75
76struct branch_info *machine__resolve_bstack(struct machine *self,
77 struct thread *thread,
78 struct branch_stack *bs);
79
80bool perf_session__has_traces(struct perf_session *self, const char *msg);
81
82void mem_bswap_64(void *src, int byte_size);
83void mem_bswap_32(void *src, int byte_size);
84void perf_event__attr_swap(struct perf_event_attr *attr);
85
86int perf_session__create_kernel_maps(struct perf_session *self);
87
88void perf_session__update_sample_type(struct perf_session *self);
89void perf_session__remove_thread(struct perf_session *self, struct thread *th);
90
91static inline
92struct machine *perf_session__find_host_machine(struct perf_session *self)
93{
94 return &self->host_machine;
95}
96
97static inline
98struct machine *perf_session__find_machine(struct perf_session *self, pid_t pid)
99{
100 if (pid == HOST_KERNEL_ID)
101 return &self->host_machine;
102 return machines__find(&self->machines, pid);
103}
104
105static inline
106struct machine *perf_session__findnew_machine(struct perf_session *self, pid_t pid)
107{
108 if (pid == HOST_KERNEL_ID)
109 return &self->host_machine;
110 return machines__findnew(&self->machines, pid);
111}
112
113static inline
114void perf_session__process_machines(struct perf_session *self,
115 struct perf_tool *tool,
116 machine__process_t process)
117{
118 process(&self->host_machine, tool);
119 return machines__process(&self->machines, process, tool);
120}
121
122struct thread *perf_session__findnew(struct perf_session *self, pid_t pid);
123size_t perf_session__fprintf(struct perf_session *self, FILE *fp);
124
125size_t perf_session__fprintf_dsos(struct perf_session *self, FILE *fp);
126
127size_t perf_session__fprintf_dsos_buildid(struct perf_session *self,
128 FILE *fp, bool with_hits);
129
130size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp);
131
132static inline int perf_session__parse_sample(struct perf_session *session,
133 const union perf_event *event,
134 struct perf_sample *sample)
135{
136 return perf_event__parse_sample(event, session->sample_type,
137 session->sample_size,
138 session->sample_id_all, sample,
139 session->header.needs_swap);
140}
141
142static inline int perf_session__synthesize_sample(struct perf_session *session,
143 union perf_event *event,
144 const struct perf_sample *sample)
145{
146 return perf_event__synthesize_sample(event, session->sample_type,
147 sample, session->header.needs_swap);
148}
149
150struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
151 unsigned int type);
152
153void perf_event__print_ip(union perf_event *event, struct perf_sample *sample,
154 struct machine *machine, struct perf_evsel *evsel,
155 int print_sym, int print_dso, int print_symoffset);
156
157int perf_session__cpu_bitmap(struct perf_session *session,
158 const char *cpu_list, unsigned long *cpu_bitmap);
159
160void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
161#endif /* __PERF_SESSION_H */