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1/*
2 * db-export.c: Support for exporting data suitable for import to a database
3 * Copyright (c) 2014, 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#include <errno.h>
17
18#include "evsel.h"
19#include "machine.h"
20#include "thread.h"
21#include "comm.h"
22#include "symbol.h"
23#include "event.h"
24#include "util.h"
25#include "thread-stack.h"
26#include "db-export.h"
27
28struct deferred_export {
29 struct list_head node;
30 struct comm *comm;
31};
32
33static int db_export__deferred(struct db_export *dbe)
34{
35 struct deferred_export *de;
36 int err;
37
38 while (!list_empty(&dbe->deferred)) {
39 de = list_entry(dbe->deferred.next, struct deferred_export,
40 node);
41 err = dbe->export_comm(dbe, de->comm);
42 list_del(&de->node);
43 free(de);
44 if (err)
45 return err;
46 }
47
48 return 0;
49}
50
51static void db_export__free_deferred(struct db_export *dbe)
52{
53 struct deferred_export *de;
54
55 while (!list_empty(&dbe->deferred)) {
56 de = list_entry(dbe->deferred.next, struct deferred_export,
57 node);
58 list_del(&de->node);
59 free(de);
60 }
61}
62
63static int db_export__defer_comm(struct db_export *dbe, struct comm *comm)
64{
65 struct deferred_export *de;
66
67 de = zalloc(sizeof(struct deferred_export));
68 if (!de)
69 return -ENOMEM;
70
71 de->comm = comm;
72 list_add_tail(&de->node, &dbe->deferred);
73
74 return 0;
75}
76
77int db_export__init(struct db_export *dbe)
78{
79 memset(dbe, 0, sizeof(struct db_export));
80 INIT_LIST_HEAD(&dbe->deferred);
81 return 0;
82}
83
84int db_export__flush(struct db_export *dbe)
85{
86 return db_export__deferred(dbe);
87}
88
89void db_export__exit(struct db_export *dbe)
90{
91 db_export__free_deferred(dbe);
92 call_return_processor__free(dbe->crp);
93 dbe->crp = NULL;
94}
95
96int db_export__evsel(struct db_export *dbe, struct perf_evsel *evsel)
97{
98 if (evsel->db_id)
99 return 0;
100
101 evsel->db_id = ++dbe->evsel_last_db_id;
102
103 if (dbe->export_evsel)
104 return dbe->export_evsel(dbe, evsel);
105
106 return 0;
107}
108
109int db_export__machine(struct db_export *dbe, struct machine *machine)
110{
111 if (machine->db_id)
112 return 0;
113
114 machine->db_id = ++dbe->machine_last_db_id;
115
116 if (dbe->export_machine)
117 return dbe->export_machine(dbe, machine);
118
119 return 0;
120}
121
122int db_export__thread(struct db_export *dbe, struct thread *thread,
123 struct machine *machine, struct comm *comm)
124{
125 struct thread *main_thread;
126 u64 main_thread_db_id = 0;
127 int err;
128
129 if (thread->db_id)
130 return 0;
131
132 thread->db_id = ++dbe->thread_last_db_id;
133
134 if (thread->pid_ != -1) {
135 if (thread->pid_ == thread->tid) {
136 main_thread = thread;
137 } else {
138 main_thread = machine__findnew_thread(machine,
139 thread->pid_,
140 thread->pid_);
141 if (!main_thread)
142 return -ENOMEM;
143 err = db_export__thread(dbe, main_thread, machine,
144 comm);
145 if (err)
146 goto out_put;
147 if (comm) {
148 err = db_export__comm_thread(dbe, comm, thread);
149 if (err)
150 goto out_put;
151 }
152 }
153 main_thread_db_id = main_thread->db_id;
154 if (main_thread != thread)
155 thread__put(main_thread);
156 }
157
158 if (dbe->export_thread)
159 return dbe->export_thread(dbe, thread, main_thread_db_id,
160 machine);
161
162 return 0;
163
164out_put:
165 thread__put(main_thread);
166 return err;
167}
168
169int db_export__comm(struct db_export *dbe, struct comm *comm,
170 struct thread *main_thread)
171{
172 int err;
173
174 if (comm->db_id)
175 return 0;
176
177 comm->db_id = ++dbe->comm_last_db_id;
178
179 if (dbe->export_comm) {
180 if (main_thread->comm_set)
181 err = dbe->export_comm(dbe, comm);
182 else
183 err = db_export__defer_comm(dbe, comm);
184 if (err)
185 return err;
186 }
187
188 return db_export__comm_thread(dbe, comm, main_thread);
189}
190
191int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
192 struct thread *thread)
193{
194 u64 db_id;
195
196 db_id = ++dbe->comm_thread_last_db_id;
197
198 if (dbe->export_comm_thread)
199 return dbe->export_comm_thread(dbe, db_id, comm, thread);
200
201 return 0;
202}
203
204int db_export__dso(struct db_export *dbe, struct dso *dso,
205 struct machine *machine)
206{
207 if (dso->db_id)
208 return 0;
209
210 dso->db_id = ++dbe->dso_last_db_id;
211
212 if (dbe->export_dso)
213 return dbe->export_dso(dbe, dso, machine);
214
215 return 0;
216}
217
218int db_export__symbol(struct db_export *dbe, struct symbol *sym,
219 struct dso *dso)
220{
221 u64 *sym_db_id = symbol__priv(sym);
222
223 if (*sym_db_id)
224 return 0;
225
226 *sym_db_id = ++dbe->symbol_last_db_id;
227
228 if (dbe->export_symbol)
229 return dbe->export_symbol(dbe, sym, dso);
230
231 return 0;
232}
233
234static struct thread *get_main_thread(struct machine *machine, struct thread *thread)
235{
236 if (thread->pid_ == thread->tid)
237 return thread__get(thread);
238
239 if (thread->pid_ == -1)
240 return NULL;
241
242 return machine__find_thread(machine, thread->pid_, thread->pid_);
243}
244
245static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
246 u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
247{
248 int err;
249
250 if (al->map) {
251 struct dso *dso = al->map->dso;
252
253 err = db_export__dso(dbe, dso, al->machine);
254 if (err)
255 return err;
256 *dso_db_id = dso->db_id;
257
258 if (!al->sym) {
259 al->sym = symbol__new(al->addr, 0, 0, "unknown");
260 if (al->sym)
261 symbols__insert(&dso->symbols[al->map->type],
262 al->sym);
263 }
264
265 if (al->sym) {
266 u64 *db_id = symbol__priv(al->sym);
267
268 err = db_export__symbol(dbe, al->sym, dso);
269 if (err)
270 return err;
271 *sym_db_id = *db_id;
272 *offset = al->addr - al->sym->start;
273 }
274 }
275
276 return 0;
277}
278
279int db_export__branch_type(struct db_export *dbe, u32 branch_type,
280 const char *name)
281{
282 if (dbe->export_branch_type)
283 return dbe->export_branch_type(dbe, branch_type, name);
284
285 return 0;
286}
287
288int db_export__sample(struct db_export *dbe, union perf_event *event,
289 struct perf_sample *sample, struct perf_evsel *evsel,
290 struct addr_location *al)
291{
292 struct thread* thread = al->thread;
293 struct export_sample es = {
294 .event = event,
295 .sample = sample,
296 .evsel = evsel,
297 .al = al,
298 };
299 struct thread *main_thread;
300 struct comm *comm = NULL;
301 int err;
302
303 err = db_export__evsel(dbe, evsel);
304 if (err)
305 return err;
306
307 err = db_export__machine(dbe, al->machine);
308 if (err)
309 return err;
310
311 main_thread = get_main_thread(al->machine, thread);
312 if (main_thread)
313 comm = machine__thread_exec_comm(al->machine, main_thread);
314
315 err = db_export__thread(dbe, thread, al->machine, comm);
316 if (err)
317 goto out_put;
318
319 if (comm) {
320 err = db_export__comm(dbe, comm, main_thread);
321 if (err)
322 goto out_put;
323 es.comm_db_id = comm->db_id;
324 }
325
326 es.db_id = ++dbe->sample_last_db_id;
327
328 err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
329 if (err)
330 goto out_put;
331
332 if ((evsel->attr.sample_type & PERF_SAMPLE_ADDR) &&
333 sample_addr_correlates_sym(&evsel->attr)) {
334 struct addr_location addr_al;
335
336 thread__resolve(thread, &addr_al, sample);
337 err = db_ids_from_al(dbe, &addr_al, &es.addr_dso_db_id,
338 &es.addr_sym_db_id, &es.addr_offset);
339 if (err)
340 goto out_put;
341 if (dbe->crp) {
342 err = thread_stack__process(thread, comm, sample, al,
343 &addr_al, es.db_id,
344 dbe->crp);
345 if (err)
346 goto out_put;
347 }
348 }
349
350 if (dbe->export_sample)
351 err = dbe->export_sample(dbe, &es);
352
353out_put:
354 thread__put(main_thread);
355 return err;
356}
357
358static struct {
359 u32 branch_type;
360 const char *name;
361} branch_types[] = {
362 {0, "no branch"},
363 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
364 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
365 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
366 {PERF_IP_FLAG_BRANCH, "unconditional jump"},
367 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
368 "software interrupt"},
369 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
370 "return from interrupt"},
371 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
372 "system call"},
373 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
374 "return from system call"},
375 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
376 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
377 PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
378 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
379 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
380 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
381 {0, NULL}
382};
383
384int db_export__branch_types(struct db_export *dbe)
385{
386 int i, err = 0;
387
388 for (i = 0; branch_types[i].name ; i++) {
389 err = db_export__branch_type(dbe, branch_types[i].branch_type,
390 branch_types[i].name);
391 if (err)
392 break;
393 }
394 return err;
395}
396
397int db_export__call_path(struct db_export *dbe, struct call_path *cp)
398{
399 int err;
400
401 if (cp->db_id)
402 return 0;
403
404 if (cp->parent) {
405 err = db_export__call_path(dbe, cp->parent);
406 if (err)
407 return err;
408 }
409
410 cp->db_id = ++dbe->call_path_last_db_id;
411
412 if (dbe->export_call_path)
413 return dbe->export_call_path(dbe, cp);
414
415 return 0;
416}
417
418int db_export__call_return(struct db_export *dbe, struct call_return *cr)
419{
420 int err;
421
422 if (cr->db_id)
423 return 0;
424
425 err = db_export__call_path(dbe, cr->cp);
426 if (err)
427 return err;
428
429 cr->db_id = ++dbe->call_return_last_db_id;
430
431 if (dbe->export_call_return)
432 return dbe->export_call_return(dbe, cr);
433
434 return 0;
435}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * db-export.c: Support for exporting data suitable for import to a database
4 * Copyright (c) 2014, Intel Corporation.
5 */
6
7#include <errno.h>
8#include <stdlib.h>
9
10#include "dso.h"
11#include "evsel.h"
12#include "machine.h"
13#include "thread.h"
14#include "comm.h"
15#include "symbol.h"
16#include "map.h"
17#include "event.h"
18#include "thread-stack.h"
19#include "callchain.h"
20#include "call-path.h"
21#include "db-export.h"
22#include <linux/zalloc.h>
23
24int db_export__init(struct db_export *dbe)
25{
26 memset(dbe, 0, sizeof(struct db_export));
27 return 0;
28}
29
30void db_export__exit(struct db_export *dbe)
31{
32 call_return_processor__free(dbe->crp);
33 dbe->crp = NULL;
34}
35
36int db_export__evsel(struct db_export *dbe, struct evsel *evsel)
37{
38 if (evsel->db_id)
39 return 0;
40
41 evsel->db_id = ++dbe->evsel_last_db_id;
42
43 if (dbe->export_evsel)
44 return dbe->export_evsel(dbe, evsel);
45
46 return 0;
47}
48
49int db_export__machine(struct db_export *dbe, struct machine *machine)
50{
51 if (machine->db_id)
52 return 0;
53
54 machine->db_id = ++dbe->machine_last_db_id;
55
56 if (dbe->export_machine)
57 return dbe->export_machine(dbe, machine);
58
59 return 0;
60}
61
62int db_export__thread(struct db_export *dbe, struct thread *thread,
63 struct machine *machine, struct thread *main_thread)
64{
65 u64 main_thread_db_id = 0;
66
67 if (thread->db_id)
68 return 0;
69
70 thread->db_id = ++dbe->thread_last_db_id;
71
72 if (main_thread)
73 main_thread_db_id = main_thread->db_id;
74
75 if (dbe->export_thread)
76 return dbe->export_thread(dbe, thread, main_thread_db_id,
77 machine);
78
79 return 0;
80}
81
82static int __db_export__comm(struct db_export *dbe, struct comm *comm,
83 struct thread *thread)
84{
85 comm->db_id = ++dbe->comm_last_db_id;
86
87 if (dbe->export_comm)
88 return dbe->export_comm(dbe, comm, thread);
89
90 return 0;
91}
92
93int db_export__comm(struct db_export *dbe, struct comm *comm,
94 struct thread *thread)
95{
96 if (comm->db_id)
97 return 0;
98
99 return __db_export__comm(dbe, comm, thread);
100}
101
102/*
103 * Export the "exec" comm. The "exec" comm is the program / application command
104 * name at the time it first executes. It is used to group threads for the same
105 * program. Note that the main thread pid (or thread group id tgid) cannot be
106 * used because it does not change when a new program is exec'ed.
107 */
108int db_export__exec_comm(struct db_export *dbe, struct comm *comm,
109 struct thread *main_thread)
110{
111 int err;
112
113 if (comm->db_id)
114 return 0;
115
116 err = __db_export__comm(dbe, comm, main_thread);
117 if (err)
118 return err;
119
120 /*
121 * Record the main thread for this comm. Note that the main thread can
122 * have many "exec" comms because there will be a new one every time it
123 * exec's. An "exec" comm however will only ever have 1 main thread.
124 * That is different to any other threads for that same program because
125 * exec() will effectively kill them, so the relationship between the
126 * "exec" comm and non-main threads is 1-to-1. That is why
127 * db_export__comm_thread() is called here for the main thread, but it
128 * is called for non-main threads when they are exported.
129 */
130 return db_export__comm_thread(dbe, comm, main_thread);
131}
132
133int db_export__comm_thread(struct db_export *dbe, struct comm *comm,
134 struct thread *thread)
135{
136 u64 db_id;
137
138 db_id = ++dbe->comm_thread_last_db_id;
139
140 if (dbe->export_comm_thread)
141 return dbe->export_comm_thread(dbe, db_id, comm, thread);
142
143 return 0;
144}
145
146int db_export__dso(struct db_export *dbe, struct dso *dso,
147 struct machine *machine)
148{
149 if (dso->db_id)
150 return 0;
151
152 dso->db_id = ++dbe->dso_last_db_id;
153
154 if (dbe->export_dso)
155 return dbe->export_dso(dbe, dso, machine);
156
157 return 0;
158}
159
160int db_export__symbol(struct db_export *dbe, struct symbol *sym,
161 struct dso *dso)
162{
163 u64 *sym_db_id = symbol__priv(sym);
164
165 if (*sym_db_id)
166 return 0;
167
168 *sym_db_id = ++dbe->symbol_last_db_id;
169
170 if (dbe->export_symbol)
171 return dbe->export_symbol(dbe, sym, dso);
172
173 return 0;
174}
175
176static int db_ids_from_al(struct db_export *dbe, struct addr_location *al,
177 u64 *dso_db_id, u64 *sym_db_id, u64 *offset)
178{
179 int err;
180
181 if (al->map) {
182 struct dso *dso = al->map->dso;
183
184 err = db_export__dso(dbe, dso, al->maps->machine);
185 if (err)
186 return err;
187 *dso_db_id = dso->db_id;
188
189 if (!al->sym) {
190 al->sym = symbol__new(al->addr, 0, 0, 0, "unknown");
191 if (al->sym)
192 dso__insert_symbol(dso, al->sym);
193 }
194
195 if (al->sym) {
196 u64 *db_id = symbol__priv(al->sym);
197
198 err = db_export__symbol(dbe, al->sym, dso);
199 if (err)
200 return err;
201 *sym_db_id = *db_id;
202 *offset = al->addr - al->sym->start;
203 }
204 }
205
206 return 0;
207}
208
209static struct call_path *call_path_from_sample(struct db_export *dbe,
210 struct machine *machine,
211 struct thread *thread,
212 struct perf_sample *sample,
213 struct evsel *evsel)
214{
215 u64 kernel_start = machine__kernel_start(machine);
216 struct call_path *current = &dbe->cpr->call_path;
217 enum chain_order saved_order = callchain_param.order;
218 int err;
219
220 if (!symbol_conf.use_callchain || !sample->callchain)
221 return NULL;
222
223 /*
224 * Since the call path tree must be built starting with the root, we
225 * must use ORDER_CALL for call chain resolution, in order to process
226 * the callchain starting with the root node and ending with the leaf.
227 */
228 callchain_param.order = ORDER_CALLER;
229 err = thread__resolve_callchain(thread, &callchain_cursor, evsel,
230 sample, NULL, NULL, PERF_MAX_STACK_DEPTH);
231 if (err) {
232 callchain_param.order = saved_order;
233 return NULL;
234 }
235 callchain_cursor_commit(&callchain_cursor);
236
237 while (1) {
238 struct callchain_cursor_node *node;
239 struct addr_location al;
240 u64 dso_db_id = 0, sym_db_id = 0, offset = 0;
241
242 memset(&al, 0, sizeof(al));
243
244 node = callchain_cursor_current(&callchain_cursor);
245 if (!node)
246 break;
247 /*
248 * Handle export of symbol and dso for this node by
249 * constructing an addr_location struct and then passing it to
250 * db_ids_from_al() to perform the export.
251 */
252 al.sym = node->ms.sym;
253 al.map = node->ms.map;
254 al.maps = thread->maps;
255 al.addr = node->ip;
256
257 if (al.map && !al.sym)
258 al.sym = dso__find_symbol(al.map->dso, al.addr);
259
260 db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
261
262 /* add node to the call path tree if it doesn't exist */
263 current = call_path__findnew(dbe->cpr, current,
264 al.sym, node->ip,
265 kernel_start);
266
267 callchain_cursor_advance(&callchain_cursor);
268 }
269
270 /* Reset the callchain order to its prior value. */
271 callchain_param.order = saved_order;
272
273 if (current == &dbe->cpr->call_path) {
274 /* Bail because the callchain was empty. */
275 return NULL;
276 }
277
278 return current;
279}
280
281int db_export__branch_type(struct db_export *dbe, u32 branch_type,
282 const char *name)
283{
284 if (dbe->export_branch_type)
285 return dbe->export_branch_type(dbe, branch_type, name);
286
287 return 0;
288}
289
290static int db_export__threads(struct db_export *dbe, struct thread *thread,
291 struct thread *main_thread,
292 struct machine *machine, struct comm **comm_ptr)
293{
294 struct comm *comm = NULL;
295 struct comm *curr_comm;
296 int err;
297
298 if (main_thread) {
299 /*
300 * A thread has a reference to the main thread, so export the
301 * main thread first.
302 */
303 err = db_export__thread(dbe, main_thread, machine, main_thread);
304 if (err)
305 return err;
306 /*
307 * Export comm before exporting the non-main thread because
308 * db_export__comm_thread() can be called further below.
309 */
310 comm = machine__thread_exec_comm(machine, main_thread);
311 if (comm) {
312 err = db_export__exec_comm(dbe, comm, main_thread);
313 if (err)
314 return err;
315 *comm_ptr = comm;
316 }
317 }
318
319 if (thread != main_thread) {
320 /*
321 * For a non-main thread, db_export__comm_thread() must be
322 * called only if thread has not previously been exported.
323 */
324 bool export_comm_thread = comm && !thread->db_id;
325
326 err = db_export__thread(dbe, thread, machine, main_thread);
327 if (err)
328 return err;
329
330 if (export_comm_thread) {
331 err = db_export__comm_thread(dbe, comm, thread);
332 if (err)
333 return err;
334 }
335 }
336
337 curr_comm = thread__comm(thread);
338 if (curr_comm)
339 return db_export__comm(dbe, curr_comm, thread);
340
341 return 0;
342}
343
344int db_export__sample(struct db_export *dbe, union perf_event *event,
345 struct perf_sample *sample, struct evsel *evsel,
346 struct addr_location *al, struct addr_location *addr_al)
347{
348 struct thread *thread = al->thread;
349 struct export_sample es = {
350 .event = event,
351 .sample = sample,
352 .evsel = evsel,
353 .al = al,
354 };
355 struct thread *main_thread;
356 struct comm *comm = NULL;
357 int err;
358
359 err = db_export__evsel(dbe, evsel);
360 if (err)
361 return err;
362
363 err = db_export__machine(dbe, al->maps->machine);
364 if (err)
365 return err;
366
367 main_thread = thread__main_thread(al->maps->machine, thread);
368
369 err = db_export__threads(dbe, thread, main_thread, al->maps->machine, &comm);
370 if (err)
371 goto out_put;
372
373 if (comm)
374 es.comm_db_id = comm->db_id;
375
376 es.db_id = ++dbe->sample_last_db_id;
377
378 err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset);
379 if (err)
380 goto out_put;
381
382 if (dbe->cpr) {
383 struct call_path *cp = call_path_from_sample(dbe, al->maps->machine,
384 thread, sample,
385 evsel);
386 if (cp) {
387 db_export__call_path(dbe, cp);
388 es.call_path_id = cp->db_id;
389 }
390 }
391
392 if (addr_al) {
393 err = db_ids_from_al(dbe, addr_al, &es.addr_dso_db_id,
394 &es.addr_sym_db_id, &es.addr_offset);
395 if (err)
396 goto out_put;
397 if (dbe->crp) {
398 err = thread_stack__process(thread, comm, sample, al,
399 addr_al, es.db_id,
400 dbe->crp);
401 if (err)
402 goto out_put;
403 }
404 }
405
406 if (dbe->export_sample)
407 err = dbe->export_sample(dbe, &es);
408
409out_put:
410 thread__put(main_thread);
411 return err;
412}
413
414static struct {
415 u32 branch_type;
416 const char *name;
417} branch_types[] = {
418 {0, "no branch"},
419 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"},
420 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"},
421 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"},
422 {PERF_IP_FLAG_BRANCH, "unconditional jump"},
423 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT,
424 "software interrupt"},
425 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT,
426 "return from interrupt"},
427 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET,
428 "system call"},
429 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET,
430 "return from system call"},
431 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"},
432 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC |
433 PERF_IP_FLAG_INTERRUPT, "hardware interrupt"},
434 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"},
435 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"},
436 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"},
437 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMENTRY, "vm entry"},
438 {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMEXIT, "vm exit"},
439 {0, NULL}
440};
441
442int db_export__branch_types(struct db_export *dbe)
443{
444 int i, err = 0;
445
446 for (i = 0; branch_types[i].name ; i++) {
447 err = db_export__branch_type(dbe, branch_types[i].branch_type,
448 branch_types[i].name);
449 if (err)
450 break;
451 }
452
453 /* Add trace begin / end variants */
454 for (i = 0; branch_types[i].name ; i++) {
455 const char *name = branch_types[i].name;
456 u32 type = branch_types[i].branch_type;
457 char buf[64];
458
459 if (type == PERF_IP_FLAG_BRANCH ||
460 (type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END)))
461 continue;
462
463 snprintf(buf, sizeof(buf), "trace begin / %s", name);
464 err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf);
465 if (err)
466 break;
467
468 snprintf(buf, sizeof(buf), "%s / trace end", name);
469 err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf);
470 if (err)
471 break;
472 }
473
474 return err;
475}
476
477int db_export__call_path(struct db_export *dbe, struct call_path *cp)
478{
479 int err;
480
481 if (cp->db_id)
482 return 0;
483
484 if (cp->parent) {
485 err = db_export__call_path(dbe, cp->parent);
486 if (err)
487 return err;
488 }
489
490 cp->db_id = ++dbe->call_path_last_db_id;
491
492 if (dbe->export_call_path)
493 return dbe->export_call_path(dbe, cp);
494
495 return 0;
496}
497
498int db_export__call_return(struct db_export *dbe, struct call_return *cr,
499 u64 *parent_db_id)
500{
501 int err;
502
503 err = db_export__call_path(dbe, cr->cp);
504 if (err)
505 return err;
506
507 if (!cr->db_id)
508 cr->db_id = ++dbe->call_return_last_db_id;
509
510 if (parent_db_id) {
511 if (!*parent_db_id)
512 *parent_db_id = ++dbe->call_return_last_db_id;
513 cr->parent_db_id = *parent_db_id;
514 }
515
516 if (dbe->export_call_return)
517 return dbe->export_call_return(dbe, cr);
518
519 return 0;
520}
521
522static int db_export__pid_tid(struct db_export *dbe, struct machine *machine,
523 pid_t pid, pid_t tid, u64 *db_id,
524 struct comm **comm_ptr, bool *is_idle)
525{
526 struct thread *thread = machine__find_thread(machine, pid, tid);
527 struct thread *main_thread;
528 int err = 0;
529
530 if (!thread || !thread->comm_set)
531 goto out_put;
532
533 *is_idle = !thread->pid_ && !thread->tid;
534
535 main_thread = thread__main_thread(machine, thread);
536
537 err = db_export__threads(dbe, thread, main_thread, machine, comm_ptr);
538
539 *db_id = thread->db_id;
540
541 thread__put(main_thread);
542out_put:
543 thread__put(thread);
544
545 return err;
546}
547
548int db_export__switch(struct db_export *dbe, union perf_event *event,
549 struct perf_sample *sample, struct machine *machine)
550{
551 bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT;
552 bool out_preempt = out &&
553 (event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT);
554 int flags = out | (out_preempt << 1);
555 bool is_idle_a = false, is_idle_b = false;
556 u64 th_a_id = 0, th_b_id = 0;
557 u64 comm_out_id, comm_in_id;
558 struct comm *comm_a = NULL;
559 struct comm *comm_b = NULL;
560 u64 th_out_id, th_in_id;
561 u64 db_id;
562 int err;
563
564 err = db_export__machine(dbe, machine);
565 if (err)
566 return err;
567
568 err = db_export__pid_tid(dbe, machine, sample->pid, sample->tid,
569 &th_a_id, &comm_a, &is_idle_a);
570 if (err)
571 return err;
572
573 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
574 pid_t pid = event->context_switch.next_prev_pid;
575 pid_t tid = event->context_switch.next_prev_tid;
576
577 err = db_export__pid_tid(dbe, machine, pid, tid, &th_b_id,
578 &comm_b, &is_idle_b);
579 if (err)
580 return err;
581 }
582
583 /*
584 * Do not export if both threads are unknown (i.e. not being traced),
585 * or one is unknown and the other is the idle task.
586 */
587 if ((!th_a_id || is_idle_a) && (!th_b_id || is_idle_b))
588 return 0;
589
590 db_id = ++dbe->context_switch_last_db_id;
591
592 if (out) {
593 th_out_id = th_a_id;
594 th_in_id = th_b_id;
595 comm_out_id = comm_a ? comm_a->db_id : 0;
596 comm_in_id = comm_b ? comm_b->db_id : 0;
597 } else {
598 th_out_id = th_b_id;
599 th_in_id = th_a_id;
600 comm_out_id = comm_b ? comm_b->db_id : 0;
601 comm_in_id = comm_a ? comm_a->db_id : 0;
602 }
603
604 if (dbe->export_context_switch)
605 return dbe->export_context_switch(dbe, db_id, machine, sample,
606 th_out_id, comm_out_id,
607 th_in_id, comm_in_id, flags);
608 return 0;
609}