1 #include <linux/kernel.h> 2 #include <traceevent/event-parse.h> 3 4 #include <byteswap.h> 5 #include <unistd.h> 6 #include <sys/types.h> 7 #include <sys/mman.h> 8 9 #include "evlist.h" 10 #include "evsel.h" 11 #include "session.h" 12 #include "tool.h" 13 #include "sort.h" 14 #include "util.h" 15 #include "cpumap.h" 16 #include "perf_regs.h" 17 #include "asm/bug.h" 18 19 static int perf_session__open(struct perf_session *session) 20 { 21 struct perf_data_file *file = session->file; 22 23 if (perf_session__read_header(session) < 0) { 24 pr_err("incompatible file format (rerun with -v to learn more)"); 25 return -1; 26 } 27 28 if (perf_data_file__is_pipe(file)) 29 return 0; 30 31 if (!perf_evlist__valid_sample_type(session->evlist)) { 32 pr_err("non matching sample_type"); 33 return -1; 34 } 35 36 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 37 pr_err("non matching sample_id_all"); 38 return -1; 39 } 40 41 if (!perf_evlist__valid_read_format(session->evlist)) { 42 pr_err("non matching read_format"); 43 return -1; 44 } 45 46 return 0; 47 } 48 49 void perf_session__set_id_hdr_size(struct perf_session *session) 50 { 51 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 52 53 machines__set_id_hdr_size(&session->machines, id_hdr_size); 54 } 55 56 int perf_session__create_kernel_maps(struct perf_session *session) 57 { 58 int ret = machine__create_kernel_maps(&session->machines.host); 59 60 if (ret >= 0) 61 ret = machines__create_guest_kernel_maps(&session->machines); 62 return ret; 63 } 64 65 static void perf_session__destroy_kernel_maps(struct perf_session *session) 66 { 67 machines__destroy_kernel_maps(&session->machines); 68 } 69 70 static bool perf_session__has_comm_exec(struct perf_session *session) 71 { 72 struct perf_evsel *evsel; 73 74 evlist__for_each(session->evlist, evsel) { 75 if (evsel->attr.comm_exec) 76 return true; 77 } 78 79 return false; 80 } 81 82 static void perf_session__set_comm_exec(struct perf_session *session) 83 { 84 bool comm_exec = perf_session__has_comm_exec(session); 85 86 machines__set_comm_exec(&session->machines, comm_exec); 87 } 88 89 struct perf_session *perf_session__new(struct perf_data_file *file, 90 bool repipe, struct perf_tool *tool) 91 { 92 struct perf_session *session = zalloc(sizeof(*session)); 93 94 if (!session) 95 goto out; 96 97 session->repipe = repipe; 98 ordered_events__init(&session->ordered_events); 99 machines__init(&session->machines); 100 101 if (file) { 102 if (perf_data_file__open(file)) 103 goto out_delete; 104 105 session->file = file; 106 107 if (perf_data_file__is_read(file)) { 108 if (perf_session__open(session) < 0) 109 goto out_close; 110 111 perf_session__set_id_hdr_size(session); 112 perf_session__set_comm_exec(session); 113 } 114 } 115 116 if (!file || perf_data_file__is_write(file)) { 117 /* 118 * In O_RDONLY mode this will be performed when reading the 119 * kernel MMAP event, in perf_event__process_mmap(). 120 */ 121 if (perf_session__create_kernel_maps(session) < 0) 122 pr_warning("Cannot read kernel map\n"); 123 } 124 125 if (tool && tool->ordering_requires_timestamps && 126 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 127 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 128 tool->ordered_events = false; 129 } 130 131 return session; 132 133 out_close: 134 perf_data_file__close(file); 135 out_delete: 136 perf_session__delete(session); 137 out: 138 return NULL; 139 } 140 141 static void perf_session__delete_dead_threads(struct perf_session *session) 142 { 143 machine__delete_dead_threads(&session->machines.host); 144 } 145 146 static void perf_session__delete_threads(struct perf_session *session) 147 { 148 machine__delete_threads(&session->machines.host); 149 } 150 151 static void perf_session_env__delete(struct perf_session_env *env) 152 { 153 zfree(&env->hostname); 154 zfree(&env->os_release); 155 zfree(&env->version); 156 zfree(&env->arch); 157 zfree(&env->cpu_desc); 158 zfree(&env->cpuid); 159 160 zfree(&env->cmdline); 161 zfree(&env->sibling_cores); 162 zfree(&env->sibling_threads); 163 zfree(&env->numa_nodes); 164 zfree(&env->pmu_mappings); 165 } 166 167 void perf_session__delete(struct perf_session *session) 168 { 169 perf_session__destroy_kernel_maps(session); 170 perf_session__delete_dead_threads(session); 171 perf_session__delete_threads(session); 172 perf_session_env__delete(&session->header.env); 173 machines__exit(&session->machines); 174 if (session->file) 175 perf_data_file__close(session->file); 176 free(session); 177 } 178 179 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 180 __maybe_unused, 181 union perf_event *event 182 __maybe_unused, 183 struct perf_session *session 184 __maybe_unused) 185 { 186 dump_printf(": unhandled!\n"); 187 return 0; 188 } 189 190 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 191 union perf_event *event __maybe_unused, 192 struct perf_evlist **pevlist 193 __maybe_unused) 194 { 195 dump_printf(": unhandled!\n"); 196 return 0; 197 } 198 199 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 200 union perf_event *event __maybe_unused, 201 struct perf_sample *sample __maybe_unused, 202 struct perf_evsel *evsel __maybe_unused, 203 struct machine *machine __maybe_unused) 204 { 205 dump_printf(": unhandled!\n"); 206 return 0; 207 } 208 209 static int process_event_stub(struct perf_tool *tool __maybe_unused, 210 union perf_event *event __maybe_unused, 211 struct perf_sample *sample __maybe_unused, 212 struct machine *machine __maybe_unused) 213 { 214 dump_printf(": unhandled!\n"); 215 return 0; 216 } 217 218 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 219 union perf_event *event __maybe_unused, 220 struct perf_session *perf_session 221 __maybe_unused) 222 { 223 dump_printf(": unhandled!\n"); 224 return 0; 225 } 226 227 static int process_finished_round(struct perf_tool *tool, 228 union perf_event *event, 229 struct perf_session *session); 230 231 static int process_id_index_stub(struct perf_tool *tool __maybe_unused, 232 union perf_event *event __maybe_unused, 233 struct perf_session *perf_session 234 __maybe_unused) 235 { 236 dump_printf(": unhandled!\n"); 237 return 0; 238 } 239 240 void perf_tool__fill_defaults(struct perf_tool *tool) 241 { 242 if (tool->sample == NULL) 243 tool->sample = process_event_sample_stub; 244 if (tool->mmap == NULL) 245 tool->mmap = process_event_stub; 246 if (tool->mmap2 == NULL) 247 tool->mmap2 = process_event_stub; 248 if (tool->comm == NULL) 249 tool->comm = process_event_stub; 250 if (tool->fork == NULL) 251 tool->fork = process_event_stub; 252 if (tool->exit == NULL) 253 tool->exit = process_event_stub; 254 if (tool->lost == NULL) 255 tool->lost = perf_event__process_lost; 256 if (tool->read == NULL) 257 tool->read = process_event_sample_stub; 258 if (tool->throttle == NULL) 259 tool->throttle = process_event_stub; 260 if (tool->unthrottle == NULL) 261 tool->unthrottle = process_event_stub; 262 if (tool->attr == NULL) 263 tool->attr = process_event_synth_attr_stub; 264 if (tool->tracing_data == NULL) 265 tool->tracing_data = process_event_synth_tracing_data_stub; 266 if (tool->build_id == NULL) 267 tool->build_id = process_finished_round_stub; 268 if (tool->finished_round == NULL) { 269 if (tool->ordered_events) 270 tool->finished_round = process_finished_round; 271 else 272 tool->finished_round = process_finished_round_stub; 273 } 274 if (tool->id_index == NULL) 275 tool->id_index = process_id_index_stub; 276 } 277 278 static void swap_sample_id_all(union perf_event *event, void *data) 279 { 280 void *end = (void *) event + event->header.size; 281 int size = end - data; 282 283 BUG_ON(size % sizeof(u64)); 284 mem_bswap_64(data, size); 285 } 286 287 static void perf_event__all64_swap(union perf_event *event, 288 bool sample_id_all __maybe_unused) 289 { 290 struct perf_event_header *hdr = &event->header; 291 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 292 } 293 294 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 295 { 296 event->comm.pid = bswap_32(event->comm.pid); 297 event->comm.tid = bswap_32(event->comm.tid); 298 299 if (sample_id_all) { 300 void *data = &event->comm.comm; 301 302 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 303 swap_sample_id_all(event, data); 304 } 305 } 306 307 static void perf_event__mmap_swap(union perf_event *event, 308 bool sample_id_all) 309 { 310 event->mmap.pid = bswap_32(event->mmap.pid); 311 event->mmap.tid = bswap_32(event->mmap.tid); 312 event->mmap.start = bswap_64(event->mmap.start); 313 event->mmap.len = bswap_64(event->mmap.len); 314 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 315 316 if (sample_id_all) { 317 void *data = &event->mmap.filename; 318 319 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 320 swap_sample_id_all(event, data); 321 } 322 } 323 324 static void perf_event__mmap2_swap(union perf_event *event, 325 bool sample_id_all) 326 { 327 event->mmap2.pid = bswap_32(event->mmap2.pid); 328 event->mmap2.tid = bswap_32(event->mmap2.tid); 329 event->mmap2.start = bswap_64(event->mmap2.start); 330 event->mmap2.len = bswap_64(event->mmap2.len); 331 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 332 event->mmap2.maj = bswap_32(event->mmap2.maj); 333 event->mmap2.min = bswap_32(event->mmap2.min); 334 event->mmap2.ino = bswap_64(event->mmap2.ino); 335 336 if (sample_id_all) { 337 void *data = &event->mmap2.filename; 338 339 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 340 swap_sample_id_all(event, data); 341 } 342 } 343 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 344 { 345 event->fork.pid = bswap_32(event->fork.pid); 346 event->fork.tid = bswap_32(event->fork.tid); 347 event->fork.ppid = bswap_32(event->fork.ppid); 348 event->fork.ptid = bswap_32(event->fork.ptid); 349 event->fork.time = bswap_64(event->fork.time); 350 351 if (sample_id_all) 352 swap_sample_id_all(event, &event->fork + 1); 353 } 354 355 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 356 { 357 event->read.pid = bswap_32(event->read.pid); 358 event->read.tid = bswap_32(event->read.tid); 359 event->read.value = bswap_64(event->read.value); 360 event->read.time_enabled = bswap_64(event->read.time_enabled); 361 event->read.time_running = bswap_64(event->read.time_running); 362 event->read.id = bswap_64(event->read.id); 363 364 if (sample_id_all) 365 swap_sample_id_all(event, &event->read + 1); 366 } 367 368 static void perf_event__throttle_swap(union perf_event *event, 369 bool sample_id_all) 370 { 371 event->throttle.time = bswap_64(event->throttle.time); 372 event->throttle.id = bswap_64(event->throttle.id); 373 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 374 375 if (sample_id_all) 376 swap_sample_id_all(event, &event->throttle + 1); 377 } 378 379 static u8 revbyte(u8 b) 380 { 381 int rev = (b >> 4) | ((b & 0xf) << 4); 382 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 383 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 384 return (u8) rev; 385 } 386 387 /* 388 * XXX this is hack in attempt to carry flags bitfield 389 * throught endian village. ABI says: 390 * 391 * Bit-fields are allocated from right to left (least to most significant) 392 * on little-endian implementations and from left to right (most to least 393 * significant) on big-endian implementations. 394 * 395 * The above seems to be byte specific, so we need to reverse each 396 * byte of the bitfield. 'Internet' also says this might be implementation 397 * specific and we probably need proper fix and carry perf_event_attr 398 * bitfield flags in separate data file FEAT_ section. Thought this seems 399 * to work for now. 400 */ 401 static void swap_bitfield(u8 *p, unsigned len) 402 { 403 unsigned i; 404 405 for (i = 0; i < len; i++) { 406 *p = revbyte(*p); 407 p++; 408 } 409 } 410 411 /* exported for swapping attributes in file header */ 412 void perf_event__attr_swap(struct perf_event_attr *attr) 413 { 414 attr->type = bswap_32(attr->type); 415 attr->size = bswap_32(attr->size); 416 attr->config = bswap_64(attr->config); 417 attr->sample_period = bswap_64(attr->sample_period); 418 attr->sample_type = bswap_64(attr->sample_type); 419 attr->read_format = bswap_64(attr->read_format); 420 attr->wakeup_events = bswap_32(attr->wakeup_events); 421 attr->bp_type = bswap_32(attr->bp_type); 422 attr->bp_addr = bswap_64(attr->bp_addr); 423 attr->bp_len = bswap_64(attr->bp_len); 424 attr->branch_sample_type = bswap_64(attr->branch_sample_type); 425 attr->sample_regs_user = bswap_64(attr->sample_regs_user); 426 attr->sample_stack_user = bswap_32(attr->sample_stack_user); 427 428 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 429 } 430 431 static void perf_event__hdr_attr_swap(union perf_event *event, 432 bool sample_id_all __maybe_unused) 433 { 434 size_t size; 435 436 perf_event__attr_swap(&event->attr.attr); 437 438 size = event->header.size; 439 size -= (void *)&event->attr.id - (void *)event; 440 mem_bswap_64(event->attr.id, size); 441 } 442 443 static void perf_event__event_type_swap(union perf_event *event, 444 bool sample_id_all __maybe_unused) 445 { 446 event->event_type.event_type.event_id = 447 bswap_64(event->event_type.event_type.event_id); 448 } 449 450 static void perf_event__tracing_data_swap(union perf_event *event, 451 bool sample_id_all __maybe_unused) 452 { 453 event->tracing_data.size = bswap_32(event->tracing_data.size); 454 } 455 456 typedef void (*perf_event__swap_op)(union perf_event *event, 457 bool sample_id_all); 458 459 static perf_event__swap_op perf_event__swap_ops[] = { 460 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 461 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 462 [PERF_RECORD_COMM] = perf_event__comm_swap, 463 [PERF_RECORD_FORK] = perf_event__task_swap, 464 [PERF_RECORD_EXIT] = perf_event__task_swap, 465 [PERF_RECORD_LOST] = perf_event__all64_swap, 466 [PERF_RECORD_READ] = perf_event__read_swap, 467 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 468 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 469 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 470 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 471 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 472 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 473 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 474 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 475 [PERF_RECORD_HEADER_MAX] = NULL, 476 }; 477 478 /* 479 * When perf record finishes a pass on every buffers, it records this pseudo 480 * event. 481 * We record the max timestamp t found in the pass n. 482 * Assuming these timestamps are monotonic across cpus, we know that if 483 * a buffer still has events with timestamps below t, they will be all 484 * available and then read in the pass n + 1. 485 * Hence when we start to read the pass n + 2, we can safely flush every 486 * events with timestamps below t. 487 * 488 * ============ PASS n ================= 489 * CPU 0 | CPU 1 490 * | 491 * cnt1 timestamps | cnt2 timestamps 492 * 1 | 2 493 * 2 | 3 494 * - | 4 <--- max recorded 495 * 496 * ============ PASS n + 1 ============== 497 * CPU 0 | CPU 1 498 * | 499 * cnt1 timestamps | cnt2 timestamps 500 * 3 | 5 501 * 4 | 6 502 * 5 | 7 <---- max recorded 503 * 504 * Flush every events below timestamp 4 505 * 506 * ============ PASS n + 2 ============== 507 * CPU 0 | CPU 1 508 * | 509 * cnt1 timestamps | cnt2 timestamps 510 * 6 | 8 511 * 7 | 9 512 * - | 10 513 * 514 * Flush every events below timestamp 7 515 * etc... 516 */ 517 static int process_finished_round(struct perf_tool *tool, 518 union perf_event *event __maybe_unused, 519 struct perf_session *session) 520 { 521 return ordered_events__flush(session, tool, OE_FLUSH__ROUND); 522 } 523 524 int perf_session_queue_event(struct perf_session *s, union perf_event *event, 525 struct perf_tool *tool, struct perf_sample *sample, 526 u64 file_offset) 527 { 528 struct ordered_events *oe = &s->ordered_events; 529 u64 timestamp = sample->time; 530 struct ordered_event *new; 531 532 if (!timestamp || timestamp == ~0ULL) 533 return -ETIME; 534 535 if (timestamp < oe->last_flush) { 536 pr_oe_time(timestamp, "out of order event\n"); 537 pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n", 538 oe->last_flush_type); 539 540 s->evlist->stats.nr_unordered_events++; 541 } 542 543 new = ordered_events__new(oe, timestamp, event); 544 if (!new) { 545 ordered_events__flush(s, tool, OE_FLUSH__HALF); 546 new = ordered_events__new(oe, timestamp, event); 547 } 548 549 if (!new) 550 return -ENOMEM; 551 552 new->file_offset = file_offset; 553 return 0; 554 } 555 556 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 557 { 558 struct ip_callchain *callchain = sample->callchain; 559 struct branch_stack *lbr_stack = sample->branch_stack; 560 u64 kernel_callchain_nr = callchain->nr; 561 unsigned int i; 562 563 for (i = 0; i < kernel_callchain_nr; i++) { 564 if (callchain->ips[i] == PERF_CONTEXT_USER) 565 break; 566 } 567 568 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 569 u64 total_nr; 570 /* 571 * LBR callstack can only get user call chain, 572 * i is kernel call chain number, 573 * 1 is PERF_CONTEXT_USER. 574 * 575 * The user call chain is stored in LBR registers. 576 * LBR are pair registers. The caller is stored 577 * in "from" register, while the callee is stored 578 * in "to" register. 579 * For example, there is a call stack 580 * "A"->"B"->"C"->"D". 581 * The LBR registers will recorde like 582 * "C"->"D", "B"->"C", "A"->"B". 583 * So only the first "to" register and all "from" 584 * registers are needed to construct the whole stack. 585 */ 586 total_nr = i + 1 + lbr_stack->nr + 1; 587 kernel_callchain_nr = i + 1; 588 589 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 590 591 for (i = 0; i < kernel_callchain_nr; i++) 592 printf("..... %2d: %016" PRIx64 "\n", 593 i, callchain->ips[i]); 594 595 printf("..... %2d: %016" PRIx64 "\n", 596 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 597 for (i = 0; i < lbr_stack->nr; i++) 598 printf("..... %2d: %016" PRIx64 "\n", 599 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 600 } 601 } 602 603 static void callchain__printf(struct perf_evsel *evsel, 604 struct perf_sample *sample) 605 { 606 unsigned int i; 607 struct ip_callchain *callchain = sample->callchain; 608 609 if (has_branch_callstack(evsel)) 610 callchain__lbr_callstack_printf(sample); 611 612 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 613 614 for (i = 0; i < callchain->nr; i++) 615 printf("..... %2d: %016" PRIx64 "\n", 616 i, callchain->ips[i]); 617 } 618 619 static void branch_stack__printf(struct perf_sample *sample) 620 { 621 uint64_t i; 622 623 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 624 625 for (i = 0; i < sample->branch_stack->nr; i++) 626 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 627 i, sample->branch_stack->entries[i].from, 628 sample->branch_stack->entries[i].to); 629 } 630 631 static void regs_dump__printf(u64 mask, u64 *regs) 632 { 633 unsigned rid, i = 0; 634 635 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 636 u64 val = regs[i++]; 637 638 printf(".... %-5s 0x%" PRIx64 "\n", 639 perf_reg_name(rid), val); 640 } 641 } 642 643 static const char *regs_abi[] = { 644 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 645 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 646 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 647 }; 648 649 static inline const char *regs_dump_abi(struct regs_dump *d) 650 { 651 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 652 return "unknown"; 653 654 return regs_abi[d->abi]; 655 } 656 657 static void regs__printf(const char *type, struct regs_dump *regs) 658 { 659 u64 mask = regs->mask; 660 661 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 662 type, 663 mask, 664 regs_dump_abi(regs)); 665 666 regs_dump__printf(mask, regs->regs); 667 } 668 669 static void regs_user__printf(struct perf_sample *sample) 670 { 671 struct regs_dump *user_regs = &sample->user_regs; 672 673 if (user_regs->regs) 674 regs__printf("user", user_regs); 675 } 676 677 static void regs_intr__printf(struct perf_sample *sample) 678 { 679 struct regs_dump *intr_regs = &sample->intr_regs; 680 681 if (intr_regs->regs) 682 regs__printf("intr", intr_regs); 683 } 684 685 static void stack_user__printf(struct stack_dump *dump) 686 { 687 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 688 dump->size, dump->offset); 689 } 690 691 static void perf_session__print_tstamp(struct perf_session *session, 692 union perf_event *event, 693 struct perf_sample *sample) 694 { 695 u64 sample_type = __perf_evlist__combined_sample_type(session->evlist); 696 697 if (event->header.type != PERF_RECORD_SAMPLE && 698 !perf_evlist__sample_id_all(session->evlist)) { 699 fputs("-1 -1 ", stdout); 700 return; 701 } 702 703 if ((sample_type & PERF_SAMPLE_CPU)) 704 printf("%u ", sample->cpu); 705 706 if (sample_type & PERF_SAMPLE_TIME) 707 printf("%" PRIu64 " ", sample->time); 708 } 709 710 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 711 { 712 printf("... sample_read:\n"); 713 714 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 715 printf("...... time enabled %016" PRIx64 "\n", 716 sample->read.time_enabled); 717 718 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 719 printf("...... time running %016" PRIx64 "\n", 720 sample->read.time_running); 721 722 if (read_format & PERF_FORMAT_GROUP) { 723 u64 i; 724 725 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 726 727 for (i = 0; i < sample->read.group.nr; i++) { 728 struct sample_read_value *value; 729 730 value = &sample->read.group.values[i]; 731 printf("..... id %016" PRIx64 732 ", value %016" PRIx64 "\n", 733 value->id, value->value); 734 } 735 } else 736 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 737 sample->read.one.id, sample->read.one.value); 738 } 739 740 static void dump_event(struct perf_session *session, union perf_event *event, 741 u64 file_offset, struct perf_sample *sample) 742 { 743 if (!dump_trace) 744 return; 745 746 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 747 file_offset, event->header.size, event->header.type); 748 749 trace_event(event); 750 751 if (sample) 752 perf_session__print_tstamp(session, event, sample); 753 754 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 755 event->header.size, perf_event__name(event->header.type)); 756 } 757 758 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 759 struct perf_sample *sample) 760 { 761 u64 sample_type; 762 763 if (!dump_trace) 764 return; 765 766 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 767 event->header.misc, sample->pid, sample->tid, sample->ip, 768 sample->period, sample->addr); 769 770 sample_type = evsel->attr.sample_type; 771 772 if (sample_type & PERF_SAMPLE_CALLCHAIN) 773 callchain__printf(evsel, sample); 774 775 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel)) 776 branch_stack__printf(sample); 777 778 if (sample_type & PERF_SAMPLE_REGS_USER) 779 regs_user__printf(sample); 780 781 if (sample_type & PERF_SAMPLE_REGS_INTR) 782 regs_intr__printf(sample); 783 784 if (sample_type & PERF_SAMPLE_STACK_USER) 785 stack_user__printf(&sample->user_stack); 786 787 if (sample_type & PERF_SAMPLE_WEIGHT) 788 printf("... weight: %" PRIu64 "\n", sample->weight); 789 790 if (sample_type & PERF_SAMPLE_DATA_SRC) 791 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 792 793 if (sample_type & PERF_SAMPLE_TRANSACTION) 794 printf("... transaction: %" PRIx64 "\n", sample->transaction); 795 796 if (sample_type & PERF_SAMPLE_READ) 797 sample_read__printf(sample, evsel->attr.read_format); 798 } 799 800 static struct machine *machines__find_for_cpumode(struct machines *machines, 801 union perf_event *event, 802 struct perf_sample *sample) 803 { 804 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 805 struct machine *machine; 806 807 if (perf_guest && 808 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 809 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 810 u32 pid; 811 812 if (event->header.type == PERF_RECORD_MMAP 813 || event->header.type == PERF_RECORD_MMAP2) 814 pid = event->mmap.pid; 815 else 816 pid = sample->pid; 817 818 machine = machines__find(machines, pid); 819 if (!machine) 820 machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID); 821 return machine; 822 } 823 824 return &machines->host; 825 } 826 827 static int deliver_sample_value(struct perf_evlist *evlist, 828 struct perf_tool *tool, 829 union perf_event *event, 830 struct perf_sample *sample, 831 struct sample_read_value *v, 832 struct machine *machine) 833 { 834 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 835 836 if (sid) { 837 sample->id = v->id; 838 sample->period = v->value - sid->period; 839 sid->period = v->value; 840 } 841 842 if (!sid || sid->evsel == NULL) { 843 ++evlist->stats.nr_unknown_id; 844 return 0; 845 } 846 847 return tool->sample(tool, event, sample, sid->evsel, machine); 848 } 849 850 static int deliver_sample_group(struct perf_evlist *evlist, 851 struct perf_tool *tool, 852 union perf_event *event, 853 struct perf_sample *sample, 854 struct machine *machine) 855 { 856 int ret = -EINVAL; 857 u64 i; 858 859 for (i = 0; i < sample->read.group.nr; i++) { 860 ret = deliver_sample_value(evlist, tool, event, sample, 861 &sample->read.group.values[i], 862 machine); 863 if (ret) 864 break; 865 } 866 867 return ret; 868 } 869 870 static int 871 perf_evlist__deliver_sample(struct perf_evlist *evlist, 872 struct perf_tool *tool, 873 union perf_event *event, 874 struct perf_sample *sample, 875 struct perf_evsel *evsel, 876 struct machine *machine) 877 { 878 /* We know evsel != NULL. */ 879 u64 sample_type = evsel->attr.sample_type; 880 u64 read_format = evsel->attr.read_format; 881 882 /* Standard sample delievery. */ 883 if (!(sample_type & PERF_SAMPLE_READ)) 884 return tool->sample(tool, event, sample, evsel, machine); 885 886 /* For PERF_SAMPLE_READ we have either single or group mode. */ 887 if (read_format & PERF_FORMAT_GROUP) 888 return deliver_sample_group(evlist, tool, event, sample, 889 machine); 890 else 891 return deliver_sample_value(evlist, tool, event, sample, 892 &sample->read.one, machine); 893 } 894 895 int perf_session__deliver_event(struct perf_session *session, 896 union perf_event *event, 897 struct perf_sample *sample, 898 struct perf_tool *tool, u64 file_offset) 899 { 900 struct perf_evlist *evlist = session->evlist; 901 struct perf_evsel *evsel; 902 struct machine *machine; 903 904 dump_event(session, event, file_offset, sample); 905 906 evsel = perf_evlist__id2evsel(evlist, sample->id); 907 908 machine = machines__find_for_cpumode(&session->machines, event, sample); 909 910 switch (event->header.type) { 911 case PERF_RECORD_SAMPLE: 912 dump_sample(evsel, event, sample); 913 if (evsel == NULL) { 914 ++evlist->stats.nr_unknown_id; 915 return 0; 916 } 917 if (machine == NULL) { 918 ++evlist->stats.nr_unprocessable_samples; 919 return 0; 920 } 921 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 922 case PERF_RECORD_MMAP: 923 return tool->mmap(tool, event, sample, machine); 924 case PERF_RECORD_MMAP2: 925 return tool->mmap2(tool, event, sample, machine); 926 case PERF_RECORD_COMM: 927 return tool->comm(tool, event, sample, machine); 928 case PERF_RECORD_FORK: 929 return tool->fork(tool, event, sample, machine); 930 case PERF_RECORD_EXIT: 931 return tool->exit(tool, event, sample, machine); 932 case PERF_RECORD_LOST: 933 if (tool->lost == perf_event__process_lost) 934 evlist->stats.total_lost += event->lost.lost; 935 return tool->lost(tool, event, sample, machine); 936 case PERF_RECORD_READ: 937 return tool->read(tool, event, sample, evsel, machine); 938 case PERF_RECORD_THROTTLE: 939 return tool->throttle(tool, event, sample, machine); 940 case PERF_RECORD_UNTHROTTLE: 941 return tool->unthrottle(tool, event, sample, machine); 942 default: 943 ++evlist->stats.nr_unknown_events; 944 return -1; 945 } 946 } 947 948 static s64 perf_session__process_user_event(struct perf_session *session, 949 union perf_event *event, 950 struct perf_tool *tool, 951 u64 file_offset) 952 { 953 int fd = perf_data_file__fd(session->file); 954 int err; 955 956 dump_event(session, event, file_offset, NULL); 957 958 /* These events are processed right away */ 959 switch (event->header.type) { 960 case PERF_RECORD_HEADER_ATTR: 961 err = tool->attr(tool, event, &session->evlist); 962 if (err == 0) { 963 perf_session__set_id_hdr_size(session); 964 perf_session__set_comm_exec(session); 965 } 966 return err; 967 case PERF_RECORD_HEADER_EVENT_TYPE: 968 /* 969 * Depreceated, but we need to handle it for sake 970 * of old data files create in pipe mode. 971 */ 972 return 0; 973 case PERF_RECORD_HEADER_TRACING_DATA: 974 /* setup for reading amidst mmap */ 975 lseek(fd, file_offset, SEEK_SET); 976 return tool->tracing_data(tool, event, session); 977 case PERF_RECORD_HEADER_BUILD_ID: 978 return tool->build_id(tool, event, session); 979 case PERF_RECORD_FINISHED_ROUND: 980 return tool->finished_round(tool, event, session); 981 case PERF_RECORD_ID_INDEX: 982 return tool->id_index(tool, event, session); 983 default: 984 return -EINVAL; 985 } 986 } 987 988 int perf_session__deliver_synth_event(struct perf_session *session, 989 union perf_event *event, 990 struct perf_sample *sample, 991 struct perf_tool *tool) 992 { 993 events_stats__inc(&session->evlist->stats, event->header.type); 994 995 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 996 return perf_session__process_user_event(session, event, tool, 0); 997 998 return perf_session__deliver_event(session, event, sample, tool, 0); 999 } 1000 1001 static void event_swap(union perf_event *event, bool sample_id_all) 1002 { 1003 perf_event__swap_op swap; 1004 1005 swap = perf_event__swap_ops[event->header.type]; 1006 if (swap) 1007 swap(event, sample_id_all); 1008 } 1009 1010 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1011 void *buf, size_t buf_sz, 1012 union perf_event **event_ptr, 1013 struct perf_sample *sample) 1014 { 1015 union perf_event *event; 1016 size_t hdr_sz, rest; 1017 int fd; 1018 1019 if (session->one_mmap && !session->header.needs_swap) { 1020 event = file_offset - session->one_mmap_offset + 1021 session->one_mmap_addr; 1022 goto out_parse_sample; 1023 } 1024 1025 if (perf_data_file__is_pipe(session->file)) 1026 return -1; 1027 1028 fd = perf_data_file__fd(session->file); 1029 hdr_sz = sizeof(struct perf_event_header); 1030 1031 if (buf_sz < hdr_sz) 1032 return -1; 1033 1034 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1035 readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz) 1036 return -1; 1037 1038 event = (union perf_event *)buf; 1039 1040 if (session->header.needs_swap) 1041 perf_event_header__bswap(&event->header); 1042 1043 if (event->header.size < hdr_sz) 1044 return -1; 1045 1046 rest = event->header.size - hdr_sz; 1047 1048 if (readn(fd, &buf, rest) != (ssize_t)rest) 1049 return -1; 1050 1051 if (session->header.needs_swap) 1052 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1053 1054 out_parse_sample: 1055 1056 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1057 perf_evlist__parse_sample(session->evlist, event, sample)) 1058 return -1; 1059 1060 *event_ptr = event; 1061 1062 return 0; 1063 } 1064 1065 static s64 perf_session__process_event(struct perf_session *session, 1066 union perf_event *event, 1067 struct perf_tool *tool, 1068 u64 file_offset) 1069 { 1070 struct perf_evlist *evlist = session->evlist; 1071 struct perf_sample sample; 1072 int ret; 1073 1074 if (session->header.needs_swap) 1075 event_swap(event, perf_evlist__sample_id_all(evlist)); 1076 1077 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1078 return -EINVAL; 1079 1080 events_stats__inc(&evlist->stats, event->header.type); 1081 1082 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1083 return perf_session__process_user_event(session, event, tool, file_offset); 1084 1085 /* 1086 * For all kernel events we get the sample data 1087 */ 1088 ret = perf_evlist__parse_sample(evlist, event, &sample); 1089 if (ret) 1090 return ret; 1091 1092 if (tool->ordered_events) { 1093 ret = perf_session_queue_event(session, event, tool, &sample, 1094 file_offset); 1095 if (ret != -ETIME) 1096 return ret; 1097 } 1098 1099 return perf_session__deliver_event(session, event, &sample, tool, 1100 file_offset); 1101 } 1102 1103 void perf_event_header__bswap(struct perf_event_header *hdr) 1104 { 1105 hdr->type = bswap_32(hdr->type); 1106 hdr->misc = bswap_16(hdr->misc); 1107 hdr->size = bswap_16(hdr->size); 1108 } 1109 1110 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1111 { 1112 return machine__findnew_thread(&session->machines.host, -1, pid); 1113 } 1114 1115 static struct thread *perf_session__register_idle_thread(struct perf_session *session) 1116 { 1117 struct thread *thread; 1118 1119 thread = machine__findnew_thread(&session->machines.host, 0, 0); 1120 if (thread == NULL || thread__set_comm(thread, "swapper", 0)) { 1121 pr_err("problem inserting idle task.\n"); 1122 thread = NULL; 1123 } 1124 1125 return thread; 1126 } 1127 1128 static void perf_tool__warn_about_errors(const struct perf_tool *tool, 1129 const struct events_stats *stats) 1130 { 1131 if (tool->lost == perf_event__process_lost && 1132 stats->nr_events[PERF_RECORD_LOST] != 0) { 1133 ui__warning("Processed %d events and lost %d chunks!\n\n" 1134 "Check IO/CPU overload!\n\n", 1135 stats->nr_events[0], 1136 stats->nr_events[PERF_RECORD_LOST]); 1137 } 1138 1139 if (stats->nr_unknown_events != 0) { 1140 ui__warning("Found %u unknown events!\n\n" 1141 "Is this an older tool processing a perf.data " 1142 "file generated by a more recent tool?\n\n" 1143 "If that is not the case, consider " 1144 "reporting to linux-kernel@vger.kernel.org.\n\n", 1145 stats->nr_unknown_events); 1146 } 1147 1148 if (stats->nr_unknown_id != 0) { 1149 ui__warning("%u samples with id not present in the header\n", 1150 stats->nr_unknown_id); 1151 } 1152 1153 if (stats->nr_invalid_chains != 0) { 1154 ui__warning("Found invalid callchains!\n\n" 1155 "%u out of %u events were discarded for this reason.\n\n" 1156 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1157 stats->nr_invalid_chains, 1158 stats->nr_events[PERF_RECORD_SAMPLE]); 1159 } 1160 1161 if (stats->nr_unprocessable_samples != 0) { 1162 ui__warning("%u unprocessable samples recorded.\n" 1163 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1164 stats->nr_unprocessable_samples); 1165 } 1166 1167 if (stats->nr_unordered_events != 0) 1168 ui__warning("%u out of order events recorded.\n", stats->nr_unordered_events); 1169 } 1170 1171 volatile int session_done; 1172 1173 static int __perf_session__process_pipe_events(struct perf_session *session, 1174 struct perf_tool *tool) 1175 { 1176 int fd = perf_data_file__fd(session->file); 1177 union perf_event *event; 1178 uint32_t size, cur_size = 0; 1179 void *buf = NULL; 1180 s64 skip = 0; 1181 u64 head; 1182 ssize_t err; 1183 void *p; 1184 1185 perf_tool__fill_defaults(tool); 1186 1187 head = 0; 1188 cur_size = sizeof(union perf_event); 1189 1190 buf = malloc(cur_size); 1191 if (!buf) 1192 return -errno; 1193 more: 1194 event = buf; 1195 err = readn(fd, event, sizeof(struct perf_event_header)); 1196 if (err <= 0) { 1197 if (err == 0) 1198 goto done; 1199 1200 pr_err("failed to read event header\n"); 1201 goto out_err; 1202 } 1203 1204 if (session->header.needs_swap) 1205 perf_event_header__bswap(&event->header); 1206 1207 size = event->header.size; 1208 if (size < sizeof(struct perf_event_header)) { 1209 pr_err("bad event header size\n"); 1210 goto out_err; 1211 } 1212 1213 if (size > cur_size) { 1214 void *new = realloc(buf, size); 1215 if (!new) { 1216 pr_err("failed to allocate memory to read event\n"); 1217 goto out_err; 1218 } 1219 buf = new; 1220 cur_size = size; 1221 event = buf; 1222 } 1223 p = event; 1224 p += sizeof(struct perf_event_header); 1225 1226 if (size - sizeof(struct perf_event_header)) { 1227 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1228 if (err <= 0) { 1229 if (err == 0) { 1230 pr_err("unexpected end of event stream\n"); 1231 goto done; 1232 } 1233 1234 pr_err("failed to read event data\n"); 1235 goto out_err; 1236 } 1237 } 1238 1239 if ((skip = perf_session__process_event(session, event, tool, head)) < 0) { 1240 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1241 head, event->header.size, event->header.type); 1242 err = -EINVAL; 1243 goto out_err; 1244 } 1245 1246 head += size; 1247 1248 if (skip > 0) 1249 head += skip; 1250 1251 if (!session_done()) 1252 goto more; 1253 done: 1254 /* do the final flush for ordered samples */ 1255 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL); 1256 out_err: 1257 free(buf); 1258 perf_tool__warn_about_errors(tool, &session->evlist->stats); 1259 ordered_events__free(&session->ordered_events); 1260 return err; 1261 } 1262 1263 static union perf_event * 1264 fetch_mmaped_event(struct perf_session *session, 1265 u64 head, size_t mmap_size, char *buf) 1266 { 1267 union perf_event *event; 1268 1269 /* 1270 * Ensure we have enough space remaining to read 1271 * the size of the event in the headers. 1272 */ 1273 if (head + sizeof(event->header) > mmap_size) 1274 return NULL; 1275 1276 event = (union perf_event *)(buf + head); 1277 1278 if (session->header.needs_swap) 1279 perf_event_header__bswap(&event->header); 1280 1281 if (head + event->header.size > mmap_size) { 1282 /* We're not fetching the event so swap back again */ 1283 if (session->header.needs_swap) 1284 perf_event_header__bswap(&event->header); 1285 return NULL; 1286 } 1287 1288 return event; 1289 } 1290 1291 /* 1292 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1293 * slices. On 32bit we use 32MB. 1294 */ 1295 #if BITS_PER_LONG == 64 1296 #define MMAP_SIZE ULLONG_MAX 1297 #define NUM_MMAPS 1 1298 #else 1299 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1300 #define NUM_MMAPS 128 1301 #endif 1302 1303 static int __perf_session__process_events(struct perf_session *session, 1304 u64 data_offset, u64 data_size, 1305 u64 file_size, struct perf_tool *tool) 1306 { 1307 int fd = perf_data_file__fd(session->file); 1308 u64 head, page_offset, file_offset, file_pos, size; 1309 int err, mmap_prot, mmap_flags, map_idx = 0; 1310 size_t mmap_size; 1311 char *buf, *mmaps[NUM_MMAPS]; 1312 union perf_event *event; 1313 struct ui_progress prog; 1314 s64 skip; 1315 1316 perf_tool__fill_defaults(tool); 1317 1318 page_offset = page_size * (data_offset / page_size); 1319 file_offset = page_offset; 1320 head = data_offset - page_offset; 1321 1322 if (data_size && (data_offset + data_size < file_size)) 1323 file_size = data_offset + data_size; 1324 1325 ui_progress__init(&prog, file_size, "Processing events..."); 1326 1327 mmap_size = MMAP_SIZE; 1328 if (mmap_size > file_size) { 1329 mmap_size = file_size; 1330 session->one_mmap = true; 1331 } 1332 1333 memset(mmaps, 0, sizeof(mmaps)); 1334 1335 mmap_prot = PROT_READ; 1336 mmap_flags = MAP_SHARED; 1337 1338 if (session->header.needs_swap) { 1339 mmap_prot |= PROT_WRITE; 1340 mmap_flags = MAP_PRIVATE; 1341 } 1342 remap: 1343 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1344 file_offset); 1345 if (buf == MAP_FAILED) { 1346 pr_err("failed to mmap file\n"); 1347 err = -errno; 1348 goto out_err; 1349 } 1350 mmaps[map_idx] = buf; 1351 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1352 file_pos = file_offset + head; 1353 if (session->one_mmap) { 1354 session->one_mmap_addr = buf; 1355 session->one_mmap_offset = file_offset; 1356 } 1357 1358 more: 1359 event = fetch_mmaped_event(session, head, mmap_size, buf); 1360 if (!event) { 1361 if (mmaps[map_idx]) { 1362 munmap(mmaps[map_idx], mmap_size); 1363 mmaps[map_idx] = NULL; 1364 } 1365 1366 page_offset = page_size * (head / page_size); 1367 file_offset += page_offset; 1368 head -= page_offset; 1369 goto remap; 1370 } 1371 1372 size = event->header.size; 1373 1374 if (size < sizeof(struct perf_event_header) || 1375 (skip = perf_session__process_event(session, event, tool, file_pos)) 1376 < 0) { 1377 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1378 file_offset + head, event->header.size, 1379 event->header.type); 1380 err = -EINVAL; 1381 goto out_err; 1382 } 1383 1384 if (skip) 1385 size += skip; 1386 1387 head += size; 1388 file_pos += size; 1389 1390 ui_progress__update(&prog, size); 1391 1392 if (session_done()) 1393 goto out; 1394 1395 if (file_pos < file_size) 1396 goto more; 1397 1398 out: 1399 /* do the final flush for ordered samples */ 1400 err = ordered_events__flush(session, tool, OE_FLUSH__FINAL); 1401 out_err: 1402 ui_progress__finish(); 1403 perf_tool__warn_about_errors(tool, &session->evlist->stats); 1404 ordered_events__free(&session->ordered_events); 1405 session->one_mmap = false; 1406 return err; 1407 } 1408 1409 int perf_session__process_events(struct perf_session *session, 1410 struct perf_tool *tool) 1411 { 1412 u64 size = perf_data_file__size(session->file); 1413 int err; 1414 1415 if (perf_session__register_idle_thread(session) == NULL) 1416 return -ENOMEM; 1417 1418 if (!perf_data_file__is_pipe(session->file)) 1419 err = __perf_session__process_events(session, 1420 session->header.data_offset, 1421 session->header.data_size, 1422 size, tool); 1423 else 1424 err = __perf_session__process_pipe_events(session, tool); 1425 1426 return err; 1427 } 1428 1429 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1430 { 1431 struct perf_evsel *evsel; 1432 1433 evlist__for_each(session->evlist, evsel) { 1434 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1435 return true; 1436 } 1437 1438 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1439 return false; 1440 } 1441 1442 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1443 const char *symbol_name, u64 addr) 1444 { 1445 char *bracket; 1446 enum map_type i; 1447 struct ref_reloc_sym *ref; 1448 1449 ref = zalloc(sizeof(struct ref_reloc_sym)); 1450 if (ref == NULL) 1451 return -ENOMEM; 1452 1453 ref->name = strdup(symbol_name); 1454 if (ref->name == NULL) { 1455 free(ref); 1456 return -ENOMEM; 1457 } 1458 1459 bracket = strchr(ref->name, ']'); 1460 if (bracket) 1461 *bracket = '\0'; 1462 1463 ref->addr = addr; 1464 1465 for (i = 0; i < MAP__NR_TYPES; ++i) { 1466 struct kmap *kmap = map__kmap(maps[i]); 1467 kmap->ref_reloc_sym = ref; 1468 } 1469 1470 return 0; 1471 } 1472 1473 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1474 { 1475 return machines__fprintf_dsos(&session->machines, fp); 1476 } 1477 1478 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1479 bool (skip)(struct dso *dso, int parm), int parm) 1480 { 1481 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1482 } 1483 1484 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1485 { 1486 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1487 1488 ret += events_stats__fprintf(&session->evlist->stats, fp); 1489 return ret; 1490 } 1491 1492 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1493 { 1494 /* 1495 * FIXME: Here we have to actually print all the machines in this 1496 * session, not just the host... 1497 */ 1498 return machine__fprintf(&session->machines.host, fp); 1499 } 1500 1501 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1502 unsigned int type) 1503 { 1504 struct perf_evsel *pos; 1505 1506 evlist__for_each(session->evlist, pos) { 1507 if (pos->attr.type == type) 1508 return pos; 1509 } 1510 return NULL; 1511 } 1512 1513 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, 1514 struct addr_location *al, 1515 unsigned int print_opts, unsigned int stack_depth) 1516 { 1517 struct callchain_cursor_node *node; 1518 int print_ip = print_opts & PRINT_IP_OPT_IP; 1519 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1520 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1521 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1522 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1523 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE; 1524 char s = print_oneline ? ' ' : '\t'; 1525 1526 if (symbol_conf.use_callchain && sample->callchain) { 1527 struct addr_location node_al; 1528 1529 if (thread__resolve_callchain(al->thread, evsel, 1530 sample, NULL, NULL, 1531 PERF_MAX_STACK_DEPTH) != 0) { 1532 if (verbose) 1533 error("Failed to resolve callchain. Skipping\n"); 1534 return; 1535 } 1536 callchain_cursor_commit(&callchain_cursor); 1537 1538 if (print_symoffset) 1539 node_al = *al; 1540 1541 while (stack_depth) { 1542 u64 addr = 0; 1543 1544 node = callchain_cursor_current(&callchain_cursor); 1545 if (!node) 1546 break; 1547 1548 if (node->sym && node->sym->ignore) 1549 goto next; 1550 1551 if (print_ip) 1552 printf("%c%16" PRIx64, s, node->ip); 1553 1554 if (node->map) 1555 addr = node->map->map_ip(node->map, node->ip); 1556 1557 if (print_sym) { 1558 printf(" "); 1559 if (print_symoffset) { 1560 node_al.addr = addr; 1561 node_al.map = node->map; 1562 symbol__fprintf_symname_offs(node->sym, &node_al, stdout); 1563 } else 1564 symbol__fprintf_symname(node->sym, stdout); 1565 } 1566 1567 if (print_dso) { 1568 printf(" ("); 1569 map__fprintf_dsoname(node->map, stdout); 1570 printf(")"); 1571 } 1572 1573 if (print_srcline) 1574 map__fprintf_srcline(node->map, addr, "\n ", 1575 stdout); 1576 1577 if (!print_oneline) 1578 printf("\n"); 1579 1580 stack_depth--; 1581 next: 1582 callchain_cursor_advance(&callchain_cursor); 1583 } 1584 1585 } else { 1586 if (al->sym && al->sym->ignore) 1587 return; 1588 1589 if (print_ip) 1590 printf("%16" PRIx64, sample->ip); 1591 1592 if (print_sym) { 1593 printf(" "); 1594 if (print_symoffset) 1595 symbol__fprintf_symname_offs(al->sym, al, 1596 stdout); 1597 else 1598 symbol__fprintf_symname(al->sym, stdout); 1599 } 1600 1601 if (print_dso) { 1602 printf(" ("); 1603 map__fprintf_dsoname(al->map, stdout); 1604 printf(")"); 1605 } 1606 1607 if (print_srcline) 1608 map__fprintf_srcline(al->map, al->addr, "\n ", stdout); 1609 } 1610 } 1611 1612 int perf_session__cpu_bitmap(struct perf_session *session, 1613 const char *cpu_list, unsigned long *cpu_bitmap) 1614 { 1615 int i, err = -1; 1616 struct cpu_map *map; 1617 1618 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1619 struct perf_evsel *evsel; 1620 1621 evsel = perf_session__find_first_evtype(session, i); 1622 if (!evsel) 1623 continue; 1624 1625 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1626 pr_err("File does not contain CPU events. " 1627 "Remove -c option to proceed.\n"); 1628 return -1; 1629 } 1630 } 1631 1632 map = cpu_map__new(cpu_list); 1633 if (map == NULL) { 1634 pr_err("Invalid cpu_list\n"); 1635 return -1; 1636 } 1637 1638 for (i = 0; i < map->nr; i++) { 1639 int cpu = map->map[i]; 1640 1641 if (cpu >= MAX_NR_CPUS) { 1642 pr_err("Requested CPU %d too large. " 1643 "Consider raising MAX_NR_CPUS\n", cpu); 1644 goto out_delete_map; 1645 } 1646 1647 set_bit(cpu, cpu_bitmap); 1648 } 1649 1650 err = 0; 1651 1652 out_delete_map: 1653 cpu_map__delete(map); 1654 return err; 1655 } 1656 1657 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1658 bool full) 1659 { 1660 struct stat st; 1661 int fd, ret; 1662 1663 if (session == NULL || fp == NULL) 1664 return; 1665 1666 fd = perf_data_file__fd(session->file); 1667 1668 ret = fstat(fd, &st); 1669 if (ret == -1) 1670 return; 1671 1672 fprintf(fp, "# ========\n"); 1673 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1674 perf_header__fprintf_info(session, fp, full); 1675 fprintf(fp, "# ========\n#\n"); 1676 } 1677 1678 1679 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1680 const struct perf_evsel_str_handler *assocs, 1681 size_t nr_assocs) 1682 { 1683 struct perf_evsel *evsel; 1684 size_t i; 1685 int err; 1686 1687 for (i = 0; i < nr_assocs; i++) { 1688 /* 1689 * Adding a handler for an event not in the session, 1690 * just ignore it. 1691 */ 1692 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1693 if (evsel == NULL) 1694 continue; 1695 1696 err = -EEXIST; 1697 if (evsel->handler != NULL) 1698 goto out; 1699 evsel->handler = assocs[i].handler; 1700 } 1701 1702 err = 0; 1703 out: 1704 return err; 1705 } 1706 1707 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 1708 union perf_event *event, 1709 struct perf_session *session) 1710 { 1711 struct perf_evlist *evlist = session->evlist; 1712 struct id_index_event *ie = &event->id_index; 1713 size_t i, nr, max_nr; 1714 1715 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 1716 sizeof(struct id_index_entry); 1717 nr = ie->nr; 1718 if (nr > max_nr) 1719 return -EINVAL; 1720 1721 if (dump_trace) 1722 fprintf(stdout, " nr: %zu\n", nr); 1723 1724 for (i = 0; i < nr; i++) { 1725 struct id_index_entry *e = &ie->entries[i]; 1726 struct perf_sample_id *sid; 1727 1728 if (dump_trace) { 1729 fprintf(stdout, " ... id: %"PRIu64, e->id); 1730 fprintf(stdout, " idx: %"PRIu64, e->idx); 1731 fprintf(stdout, " cpu: %"PRId64, e->cpu); 1732 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 1733 } 1734 1735 sid = perf_evlist__id2sid(evlist, e->id); 1736 if (!sid) 1737 return -ENOENT; 1738 sid->idx = e->idx; 1739 sid->cpu = e->cpu; 1740 sid->tid = e->tid; 1741 } 1742 return 0; 1743 } 1744 1745 int perf_event__synthesize_id_index(struct perf_tool *tool, 1746 perf_event__handler_t process, 1747 struct perf_evlist *evlist, 1748 struct machine *machine) 1749 { 1750 union perf_event *ev; 1751 struct perf_evsel *evsel; 1752 size_t nr = 0, i = 0, sz, max_nr, n; 1753 int err; 1754 1755 pr_debug2("Synthesizing id index\n"); 1756 1757 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 1758 sizeof(struct id_index_entry); 1759 1760 evlist__for_each(evlist, evsel) 1761 nr += evsel->ids; 1762 1763 n = nr > max_nr ? max_nr : nr; 1764 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 1765 ev = zalloc(sz); 1766 if (!ev) 1767 return -ENOMEM; 1768 1769 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 1770 ev->id_index.header.size = sz; 1771 ev->id_index.nr = n; 1772 1773 evlist__for_each(evlist, evsel) { 1774 u32 j; 1775 1776 for (j = 0; j < evsel->ids; j++) { 1777 struct id_index_entry *e; 1778 struct perf_sample_id *sid; 1779 1780 if (i >= n) { 1781 err = process(tool, ev, NULL, machine); 1782 if (err) 1783 goto out_err; 1784 nr -= n; 1785 i = 0; 1786 } 1787 1788 e = &ev->id_index.entries[i++]; 1789 1790 e->id = evsel->id[j]; 1791 1792 sid = perf_evlist__id2sid(evlist, e->id); 1793 if (!sid) { 1794 free(ev); 1795 return -ENOENT; 1796 } 1797 1798 e->idx = sid->idx; 1799 e->cpu = sid->cpu; 1800 e->tid = sid->tid; 1801 } 1802 } 1803 1804 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 1805 ev->id_index.header.size = sz; 1806 ev->id_index.nr = nr; 1807 1808 err = process(tool, ev, NULL, machine); 1809 out_err: 1810 free(ev); 1811 1812 return err; 1813 } 1814