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2025cf9e | 1 | // SPDX-License-Identifier: GPL-2.0-only |
0db15b1e AH |
2 | /* |
3 | * db-export.c: Support for exporting data suitable for import to a database | |
4 | * Copyright (c) 2014, Intel Corporation. | |
0db15b1e AH |
5 | */ |
6 | ||
7 | #include <errno.h> | |
215a0d30 | 8 | #include <stdlib.h> |
0db15b1e | 9 | |
4a3cec84 | 10 | #include "dso.h" |
0db15b1e AH |
11 | #include "evsel.h" |
12 | #include "machine.h" | |
13 | #include "thread.h" | |
14 | #include "comm.h" | |
15 | #include "symbol.h" | |
1101f69a | 16 | #include "map.h" |
0db15b1e | 17 | #include "event.h" |
88f50d60 | 18 | #include "thread-stack.h" |
0a3eba3a | 19 | #include "callchain.h" |
451db126 | 20 | #include "call-path.h" |
0db15b1e | 21 | #include "db-export.h" |
7f7c536f | 22 | #include <linux/zalloc.h> |
0db15b1e AH |
23 | |
24 | int db_export__init(struct db_export *dbe) | |
25 | { | |
26 | memset(dbe, 0, sizeof(struct db_export)); | |
27 | return 0; | |
28 | } | |
29 | ||
88f50d60 | 30 | void db_export__exit(struct db_export *dbe) |
0db15b1e | 31 | { |
88f50d60 AH |
32 | call_return_processor__free(dbe->crp); |
33 | dbe->crp = NULL; | |
0db15b1e AH |
34 | } |
35 | ||
32dcd021 | 36 | int db_export__evsel(struct db_export *dbe, struct evsel *evsel) |
0db15b1e AH |
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 | ||
49 | int 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 | ||
62 | int db_export__thread(struct db_export *dbe, struct thread *thread, | |
1ed11958 | 63 | struct machine *machine, struct thread *main_thread) |
0db15b1e AH |
64 | { |
65 | u64 main_thread_db_id = 0; | |
0db15b1e | 66 | |
ee84a303 | 67 | if (thread__db_id(thread)) |
0db15b1e AH |
68 | return 0; |
69 | ||
ee84a303 | 70 | thread__set_db_id(thread, ++dbe->thread_last_db_id); |
0db15b1e | 71 | |
1ed11958 | 72 | if (main_thread) |
ee84a303 | 73 | main_thread_db_id = thread__db_id(main_thread); |
0db15b1e AH |
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 | ||
80859c94 AH |
82 | static 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 | ||
93 | int 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 | ||
208032fe AH |
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 | */ | |
108 | int db_export__exec_comm(struct db_export *dbe, struct comm *comm, | |
109 | struct thread *main_thread) | |
0db15b1e AH |
110 | { |
111 | int err; | |
112 | ||
113 | if (comm->db_id) | |
114 | return 0; | |
115 | ||
80859c94 AH |
116 | err = __db_export__comm(dbe, comm, main_thread); |
117 | if (err) | |
118 | return err; | |
0db15b1e | 119 | |
208032fe AH |
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 | */ | |
0db15b1e AH |
130 | return db_export__comm_thread(dbe, comm, main_thread); |
131 | } | |
132 | ||
133 | int 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 | ||
146 | int 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 | ||
160 | int 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 | ||
0db15b1e AH |
176 | static 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) { | |
63df0e4b | 182 | struct dso *dso = map__dso(al->map); |
0db15b1e | 183 | |
5ab6d715 | 184 | err = db_export__dso(dbe, dso, maps__machine(al->maps)); |
0db15b1e AH |
185 | if (err) |
186 | return err; | |
187 | *dso_db_id = dso->db_id; | |
188 | ||
189 | if (!al->sym) { | |
af30bffa | 190 | al->sym = symbol__new(al->addr, 0, 0, 0, "unknown"); |
0db15b1e | 191 | if (al->sym) |
3183f8ca | 192 | dso__insert_symbol(dso, al->sym); |
0db15b1e AH |
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 | ||
0a3eba3a CP |
209 | static struct call_path *call_path_from_sample(struct db_export *dbe, |
210 | struct machine *machine, | |
211 | struct thread *thread, | |
212 | struct perf_sample *sample, | |
32dcd021 | 213 | struct evsel *evsel) |
0a3eba3a CP |
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, | |
fe176085 | 230 | sample, NULL, NULL, PERF_MAX_STACK_DEPTH); |
0a3eba3a CP |
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 | */ | |
5f0fef8a ACM |
252 | al.sym = node->ms.sym; |
253 | al.map = node->ms.map; | |
ee84a303 | 254 | al.maps = thread__maps(thread); |
7a2544c0 | 255 | al.addr = node->ip; |
0a3eba3a | 256 | |
83302e79 | 257 | if (al.map && !al.sym) |
63df0e4b | 258 | al.sym = dso__find_symbol(map__dso(al.map), al.addr); |
83302e79 | 259 | |
0a3eba3a CP |
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 | ||
f2bff007 AH |
281 | int 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 | ||
b3694e6c AH |
290 | static int db_export__threads(struct db_export *dbe, struct thread *thread, |
291 | struct thread *main_thread, | |
292 | struct machine *machine, struct comm **comm_ptr) | |
0db15b1e | 293 | { |
0db15b1e | 294 | struct comm *comm = NULL; |
4650c7be | 295 | struct comm *curr_comm; |
0db15b1e AH |
296 | int err; |
297 | ||
19207d86 | 298 | if (main_thread) { |
19207d86 AH |
299 | /* |
300 | * A thread has a reference to the main thread, so export the | |
301 | * main thread first. | |
302 | */ | |
b3694e6c | 303 | err = db_export__thread(dbe, main_thread, machine, main_thread); |
19207d86 | 304 | if (err) |
b3694e6c | 305 | return err; |
1ed11958 AH |
306 | /* |
307 | * Export comm before exporting the non-main thread because | |
308 | * db_export__comm_thread() can be called further below. | |
309 | */ | |
b3694e6c | 310 | comm = machine__thread_exec_comm(machine, main_thread); |
6319790b AH |
311 | if (comm) { |
312 | err = db_export__exec_comm(dbe, comm, main_thread); | |
313 | if (err) | |
b3694e6c AH |
314 | return err; |
315 | *comm_ptr = comm; | |
6319790b | 316 | } |
19207d86 | 317 | } |
0db15b1e | 318 | |
19207d86 | 319 | if (thread != main_thread) { |
1ed11958 AH |
320 | /* |
321 | * For a non-main thread, db_export__comm_thread() must be | |
322 | * called only if thread has not previously been exported. | |
323 | */ | |
ee84a303 | 324 | bool export_comm_thread = comm && !thread__db_id(thread); |
1ed11958 | 325 | |
b3694e6c | 326 | err = db_export__thread(dbe, thread, machine, main_thread); |
19207d86 | 327 | if (err) |
b3694e6c | 328 | return err; |
1ed11958 AH |
329 | |
330 | if (export_comm_thread) { | |
331 | err = db_export__comm_thread(dbe, comm, thread); | |
332 | if (err) | |
b3694e6c | 333 | return err; |
1ed11958 | 334 | } |
19207d86 | 335 | } |
0db15b1e | 336 | |
4650c7be | 337 | curr_comm = thread__comm(thread); |
b3694e6c AH |
338 | if (curr_comm) |
339 | return db_export__comm(dbe, curr_comm, thread); | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
344 | int db_export__sample(struct db_export *dbe, union perf_event *event, | |
32dcd021 | 345 | struct perf_sample *sample, struct evsel *evsel, |
3f8e009e | 346 | struct addr_location *al, struct addr_location *addr_al) |
b3694e6c AH |
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; | |
5ab6d715 | 357 | struct machine *machine; |
b3694e6c AH |
358 | int err; |
359 | ||
360 | err = db_export__evsel(dbe, evsel); | |
361 | if (err) | |
362 | return err; | |
363 | ||
5ab6d715 IR |
364 | machine = maps__machine(al->maps); |
365 | err = db_export__machine(dbe, machine); | |
b3694e6c AH |
366 | if (err) |
367 | return err; | |
368 | ||
5ab6d715 | 369 | main_thread = thread__main_thread(machine, thread); |
b3694e6c | 370 | |
5ab6d715 | 371 | err = db_export__threads(dbe, thread, main_thread, machine, &comm); |
b3694e6c AH |
372 | if (err) |
373 | goto out_put; | |
374 | ||
375 | if (comm) | |
376 | es.comm_db_id = comm->db_id; | |
4650c7be | 377 | |
0db15b1e AH |
378 | es.db_id = ++dbe->sample_last_db_id; |
379 | ||
380 | err = db_ids_from_al(dbe, al, &es.dso_db_id, &es.sym_db_id, &es.offset); | |
381 | if (err) | |
427cde32 | 382 | goto out_put; |
0db15b1e | 383 | |
0a3eba3a | 384 | if (dbe->cpr) { |
5ab6d715 | 385 | struct call_path *cp = call_path_from_sample(dbe, machine, |
0a3eba3a CP |
386 | thread, sample, |
387 | evsel); | |
568850ea | 388 | if (cp) { |
0a3eba3a | 389 | db_export__call_path(dbe, cp); |
568850ea CP |
390 | es.call_path_id = cp->db_id; |
391 | } | |
0a3eba3a CP |
392 | } |
393 | ||
3f8e009e AH |
394 | if (addr_al) { |
395 | err = db_ids_from_al(dbe, addr_al, &es.addr_dso_db_id, | |
0db15b1e AH |
396 | &es.addr_sym_db_id, &es.addr_offset); |
397 | if (err) | |
427cde32 | 398 | goto out_put; |
88f50d60 AH |
399 | if (dbe->crp) { |
400 | err = thread_stack__process(thread, comm, sample, al, | |
3f8e009e | 401 | addr_al, es.db_id, |
88f50d60 AH |
402 | dbe->crp); |
403 | if (err) | |
427cde32 | 404 | goto out_put; |
88f50d60 | 405 | } |
0db15b1e AH |
406 | } |
407 | ||
408 | if (dbe->export_sample) | |
427cde32 | 409 | err = dbe->export_sample(dbe, &es); |
0db15b1e | 410 | |
427cde32 AH |
411 | out_put: |
412 | thread__put(main_thread); | |
413 | return err; | |
0db15b1e | 414 | } |
f2bff007 AH |
415 | |
416 | static struct { | |
417 | u32 branch_type; | |
418 | const char *name; | |
419 | } branch_types[] = { | |
420 | {0, "no branch"}, | |
421 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL, "call"}, | |
422 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN, "return"}, | |
423 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CONDITIONAL, "conditional jump"}, | |
424 | {PERF_IP_FLAG_BRANCH, "unconditional jump"}, | |
425 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_INTERRUPT, | |
426 | "software interrupt"}, | |
427 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_INTERRUPT, | |
428 | "return from interrupt"}, | |
429 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_SYSCALLRET, | |
430 | "system call"}, | |
431 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_RETURN | PERF_IP_FLAG_SYSCALLRET, | |
432 | "return from system call"}, | |
433 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_ASYNC, "asynchronous branch"}, | |
434 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_ASYNC | | |
435 | PERF_IP_FLAG_INTERRUPT, "hardware interrupt"}, | |
436 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TX_ABORT, "transaction abort"}, | |
437 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_BEGIN, "trace begin"}, | |
438 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_TRACE_END, "trace end"}, | |
c025d46c AH |
439 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMENTRY, "vm entry"}, |
440 | {PERF_IP_FLAG_BRANCH | PERF_IP_FLAG_CALL | PERF_IP_FLAG_VMEXIT, "vm exit"}, | |
f2bff007 AH |
441 | {0, NULL} |
442 | }; | |
443 | ||
444 | int db_export__branch_types(struct db_export *dbe) | |
445 | { | |
446 | int i, err = 0; | |
447 | ||
448 | for (i = 0; branch_types[i].name ; i++) { | |
449 | err = db_export__branch_type(dbe, branch_types[i].branch_type, | |
450 | branch_types[i].name); | |
451 | if (err) | |
452 | break; | |
453 | } | |
ff645daf AH |
454 | |
455 | /* Add trace begin / end variants */ | |
456 | for (i = 0; branch_types[i].name ; i++) { | |
457 | const char *name = branch_types[i].name; | |
458 | u32 type = branch_types[i].branch_type; | |
459 | char buf[64]; | |
460 | ||
461 | if (type == PERF_IP_FLAG_BRANCH || | |
462 | (type & (PERF_IP_FLAG_TRACE_BEGIN | PERF_IP_FLAG_TRACE_END))) | |
463 | continue; | |
464 | ||
465 | snprintf(buf, sizeof(buf), "trace begin / %s", name); | |
466 | err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_BEGIN, buf); | |
467 | if (err) | |
468 | break; | |
469 | ||
470 | snprintf(buf, sizeof(buf), "%s / trace end", name); | |
471 | err = db_export__branch_type(dbe, type | PERF_IP_FLAG_TRACE_END, buf); | |
472 | if (err) | |
473 | break; | |
474 | } | |
475 | ||
f2bff007 AH |
476 | return err; |
477 | } | |
88f50d60 AH |
478 | |
479 | int db_export__call_path(struct db_export *dbe, struct call_path *cp) | |
480 | { | |
481 | int err; | |
482 | ||
483 | if (cp->db_id) | |
484 | return 0; | |
485 | ||
486 | if (cp->parent) { | |
487 | err = db_export__call_path(dbe, cp->parent); | |
488 | if (err) | |
489 | return err; | |
490 | } | |
491 | ||
492 | cp->db_id = ++dbe->call_path_last_db_id; | |
493 | ||
494 | if (dbe->export_call_path) | |
495 | return dbe->export_call_path(dbe, cp); | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
f435887e AH |
500 | int db_export__call_return(struct db_export *dbe, struct call_return *cr, |
501 | u64 *parent_db_id) | |
88f50d60 AH |
502 | { |
503 | int err; | |
504 | ||
88f50d60 AH |
505 | err = db_export__call_path(dbe, cr->cp); |
506 | if (err) | |
507 | return err; | |
508 | ||
f435887e AH |
509 | if (!cr->db_id) |
510 | cr->db_id = ++dbe->call_return_last_db_id; | |
511 | ||
512 | if (parent_db_id) { | |
513 | if (!*parent_db_id) | |
514 | *parent_db_id = ++dbe->call_return_last_db_id; | |
515 | cr->parent_db_id = *parent_db_id; | |
516 | } | |
88f50d60 AH |
517 | |
518 | if (dbe->export_call_return) | |
519 | return dbe->export_call_return(dbe, cr); | |
520 | ||
521 | return 0; | |
522 | } | |
abde8722 AH |
523 | |
524 | static int db_export__pid_tid(struct db_export *dbe, struct machine *machine, | |
525 | pid_t pid, pid_t tid, u64 *db_id, | |
526 | struct comm **comm_ptr, bool *is_idle) | |
527 | { | |
528 | struct thread *thread = machine__find_thread(machine, pid, tid); | |
529 | struct thread *main_thread; | |
530 | int err = 0; | |
531 | ||
ee84a303 | 532 | if (!thread || !thread__comm_set(thread)) |
abde8722 AH |
533 | goto out_put; |
534 | ||
ee84a303 | 535 | *is_idle = !thread__pid(thread) && !thread__tid(thread); |
abde8722 AH |
536 | |
537 | main_thread = thread__main_thread(machine, thread); | |
538 | ||
539 | err = db_export__threads(dbe, thread, main_thread, machine, comm_ptr); | |
540 | ||
ee84a303 | 541 | *db_id = thread__db_id(thread); |
abde8722 AH |
542 | |
543 | thread__put(main_thread); | |
544 | out_put: | |
545 | thread__put(thread); | |
546 | ||
547 | return err; | |
548 | } | |
549 | ||
550 | int db_export__switch(struct db_export *dbe, union perf_event *event, | |
551 | struct perf_sample *sample, struct machine *machine) | |
552 | { | |
553 | bool out = event->header.misc & PERF_RECORD_MISC_SWITCH_OUT; | |
554 | bool out_preempt = out && | |
555 | (event->header.misc & PERF_RECORD_MISC_SWITCH_OUT_PREEMPT); | |
556 | int flags = out | (out_preempt << 1); | |
557 | bool is_idle_a = false, is_idle_b = false; | |
558 | u64 th_a_id = 0, th_b_id = 0; | |
559 | u64 comm_out_id, comm_in_id; | |
560 | struct comm *comm_a = NULL; | |
561 | struct comm *comm_b = NULL; | |
562 | u64 th_out_id, th_in_id; | |
563 | u64 db_id; | |
564 | int err; | |
565 | ||
566 | err = db_export__machine(dbe, machine); | |
567 | if (err) | |
568 | return err; | |
569 | ||
570 | err = db_export__pid_tid(dbe, machine, sample->pid, sample->tid, | |
571 | &th_a_id, &comm_a, &is_idle_a); | |
572 | if (err) | |
573 | return err; | |
574 | ||
575 | if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { | |
576 | pid_t pid = event->context_switch.next_prev_pid; | |
577 | pid_t tid = event->context_switch.next_prev_tid; | |
578 | ||
579 | err = db_export__pid_tid(dbe, machine, pid, tid, &th_b_id, | |
580 | &comm_b, &is_idle_b); | |
581 | if (err) | |
582 | return err; | |
583 | } | |
584 | ||
585 | /* | |
586 | * Do not export if both threads are unknown (i.e. not being traced), | |
587 | * or one is unknown and the other is the idle task. | |
588 | */ | |
589 | if ((!th_a_id || is_idle_a) && (!th_b_id || is_idle_b)) | |
590 | return 0; | |
591 | ||
592 | db_id = ++dbe->context_switch_last_db_id; | |
593 | ||
594 | if (out) { | |
595 | th_out_id = th_a_id; | |
596 | th_in_id = th_b_id; | |
597 | comm_out_id = comm_a ? comm_a->db_id : 0; | |
598 | comm_in_id = comm_b ? comm_b->db_id : 0; | |
599 | } else { | |
600 | th_out_id = th_b_id; | |
601 | th_in_id = th_a_id; | |
602 | comm_out_id = comm_b ? comm_b->db_id : 0; | |
603 | comm_in_id = comm_a ? comm_a->db_id : 0; | |
604 | } | |
605 | ||
606 | if (dbe->export_context_switch) | |
607 | return dbe->export_context_switch(dbe, db_id, machine, sample, | |
608 | th_out_id, comm_out_id, | |
609 | th_in_id, comm_in_id, flags); | |
610 | return 0; | |
611 | } |