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 machines__deliver_event(struct machines *machines, 20 struct perf_evlist *evlist, 21 union perf_event *event, 22 struct perf_sample *sample, 23 struct perf_tool *tool, u64 file_offset); 24 25 static int perf_session__open(struct perf_session *session) 26 { 27 struct perf_data_file *file = session->file; 28 29 if (perf_session__read_header(session) < 0) { 30 pr_err("incompatible file format (rerun with -v to learn more)"); 31 return -1; 32 } 33 34 if (perf_data_file__is_pipe(file)) 35 return 0; 36 37 if (!perf_evlist__valid_sample_type(session->evlist)) { 38 pr_err("non matching sample_type"); 39 return -1; 40 } 41 42 if (!perf_evlist__valid_sample_id_all(session->evlist)) { 43 pr_err("non matching sample_id_all"); 44 return -1; 45 } 46 47 if (!perf_evlist__valid_read_format(session->evlist)) { 48 pr_err("non matching read_format"); 49 return -1; 50 } 51 52 return 0; 53 } 54 55 void perf_session__set_id_hdr_size(struct perf_session *session) 56 { 57 u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist); 58 59 machines__set_id_hdr_size(&session->machines, id_hdr_size); 60 } 61 62 int perf_session__create_kernel_maps(struct perf_session *session) 63 { 64 int ret = machine__create_kernel_maps(&session->machines.host); 65 66 if (ret >= 0) 67 ret = machines__create_guest_kernel_maps(&session->machines); 68 return ret; 69 } 70 71 static void perf_session__destroy_kernel_maps(struct perf_session *session) 72 { 73 machines__destroy_kernel_maps(&session->machines); 74 } 75 76 static bool perf_session__has_comm_exec(struct perf_session *session) 77 { 78 struct perf_evsel *evsel; 79 80 evlist__for_each(session->evlist, evsel) { 81 if (evsel->attr.comm_exec) 82 return true; 83 } 84 85 return false; 86 } 87 88 static void perf_session__set_comm_exec(struct perf_session *session) 89 { 90 bool comm_exec = perf_session__has_comm_exec(session); 91 92 machines__set_comm_exec(&session->machines, comm_exec); 93 } 94 95 static int ordered_events__deliver_event(struct ordered_events *oe, 96 struct ordered_event *event) 97 { 98 struct perf_sample sample; 99 struct perf_session *session = container_of(oe, struct perf_session, 100 ordered_events); 101 int ret = perf_evlist__parse_sample(session->evlist, event->event, &sample); 102 103 if (ret) { 104 pr_err("Can't parse sample, err = %d\n", ret); 105 return ret; 106 } 107 108 return machines__deliver_event(&session->machines, session->evlist, event->event, 109 &sample, session->tool, event->file_offset); 110 } 111 112 struct perf_session *perf_session__new(struct perf_data_file *file, 113 bool repipe, struct perf_tool *tool) 114 { 115 struct perf_session *session = zalloc(sizeof(*session)); 116 117 if (!session) 118 goto out; 119 120 session->repipe = repipe; 121 session->tool = tool; 122 machines__init(&session->machines); 123 ordered_events__init(&session->ordered_events, ordered_events__deliver_event); 124 125 if (file) { 126 if (perf_data_file__open(file)) 127 goto out_delete; 128 129 session->file = file; 130 131 if (perf_data_file__is_read(file)) { 132 if (perf_session__open(session) < 0) 133 goto out_close; 134 135 perf_session__set_id_hdr_size(session); 136 perf_session__set_comm_exec(session); 137 } 138 } 139 140 if (!file || perf_data_file__is_write(file)) { 141 /* 142 * In O_RDONLY mode this will be performed when reading the 143 * kernel MMAP event, in perf_event__process_mmap(). 144 */ 145 if (perf_session__create_kernel_maps(session) < 0) 146 pr_warning("Cannot read kernel map\n"); 147 } 148 149 if (tool && tool->ordering_requires_timestamps && 150 tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { 151 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 152 tool->ordered_events = false; 153 } 154 155 return session; 156 157 out_close: 158 perf_data_file__close(file); 159 out_delete: 160 perf_session__delete(session); 161 out: 162 return NULL; 163 } 164 165 static void perf_session__delete_threads(struct perf_session *session) 166 { 167 machine__delete_threads(&session->machines.host); 168 } 169 170 static void perf_session_env__delete(struct perf_session_env *env) 171 { 172 zfree(&env->hostname); 173 zfree(&env->os_release); 174 zfree(&env->version); 175 zfree(&env->arch); 176 zfree(&env->cpu_desc); 177 zfree(&env->cpuid); 178 179 zfree(&env->cmdline); 180 zfree(&env->sibling_cores); 181 zfree(&env->sibling_threads); 182 zfree(&env->numa_nodes); 183 zfree(&env->pmu_mappings); 184 } 185 186 void perf_session__delete(struct perf_session *session) 187 { 188 perf_session__destroy_kernel_maps(session); 189 perf_session__delete_threads(session); 190 perf_session_env__delete(&session->header.env); 191 machines__exit(&session->machines); 192 if (session->file) 193 perf_data_file__close(session->file); 194 free(session); 195 } 196 197 static int process_event_synth_tracing_data_stub(struct perf_tool *tool 198 __maybe_unused, 199 union perf_event *event 200 __maybe_unused, 201 struct perf_session *session 202 __maybe_unused) 203 { 204 dump_printf(": unhandled!\n"); 205 return 0; 206 } 207 208 static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused, 209 union perf_event *event __maybe_unused, 210 struct perf_evlist **pevlist 211 __maybe_unused) 212 { 213 dump_printf(": unhandled!\n"); 214 return 0; 215 } 216 217 static int process_event_sample_stub(struct perf_tool *tool __maybe_unused, 218 union perf_event *event __maybe_unused, 219 struct perf_sample *sample __maybe_unused, 220 struct perf_evsel *evsel __maybe_unused, 221 struct machine *machine __maybe_unused) 222 { 223 dump_printf(": unhandled!\n"); 224 return 0; 225 } 226 227 static int process_event_stub(struct perf_tool *tool __maybe_unused, 228 union perf_event *event __maybe_unused, 229 struct perf_sample *sample __maybe_unused, 230 struct machine *machine __maybe_unused) 231 { 232 dump_printf(": unhandled!\n"); 233 return 0; 234 } 235 236 static int process_build_id_stub(struct perf_tool *tool __maybe_unused, 237 union perf_event *event __maybe_unused, 238 struct perf_session *session __maybe_unused) 239 { 240 dump_printf(": unhandled!\n"); 241 return 0; 242 } 243 244 static int process_finished_round_stub(struct perf_tool *tool __maybe_unused, 245 union perf_event *event __maybe_unused, 246 struct ordered_events *oe __maybe_unused) 247 { 248 dump_printf(": unhandled!\n"); 249 return 0; 250 } 251 252 static int process_finished_round(struct perf_tool *tool, 253 union perf_event *event, 254 struct ordered_events *oe); 255 256 static int process_id_index_stub(struct perf_tool *tool __maybe_unused, 257 union perf_event *event __maybe_unused, 258 struct perf_session *perf_session 259 __maybe_unused) 260 { 261 dump_printf(": unhandled!\n"); 262 return 0; 263 } 264 265 void perf_tool__fill_defaults(struct perf_tool *tool) 266 { 267 if (tool->sample == NULL) 268 tool->sample = process_event_sample_stub; 269 if (tool->mmap == NULL) 270 tool->mmap = process_event_stub; 271 if (tool->mmap2 == NULL) 272 tool->mmap2 = process_event_stub; 273 if (tool->comm == NULL) 274 tool->comm = process_event_stub; 275 if (tool->fork == NULL) 276 tool->fork = process_event_stub; 277 if (tool->exit == NULL) 278 tool->exit = process_event_stub; 279 if (tool->lost == NULL) 280 tool->lost = perf_event__process_lost; 281 if (tool->read == NULL) 282 tool->read = process_event_sample_stub; 283 if (tool->throttle == NULL) 284 tool->throttle = process_event_stub; 285 if (tool->unthrottle == NULL) 286 tool->unthrottle = process_event_stub; 287 if (tool->attr == NULL) 288 tool->attr = process_event_synth_attr_stub; 289 if (tool->tracing_data == NULL) 290 tool->tracing_data = process_event_synth_tracing_data_stub; 291 if (tool->build_id == NULL) 292 tool->build_id = process_build_id_stub; 293 if (tool->finished_round == NULL) { 294 if (tool->ordered_events) 295 tool->finished_round = process_finished_round; 296 else 297 tool->finished_round = process_finished_round_stub; 298 } 299 if (tool->id_index == NULL) 300 tool->id_index = process_id_index_stub; 301 } 302 303 static void swap_sample_id_all(union perf_event *event, void *data) 304 { 305 void *end = (void *) event + event->header.size; 306 int size = end - data; 307 308 BUG_ON(size % sizeof(u64)); 309 mem_bswap_64(data, size); 310 } 311 312 static void perf_event__all64_swap(union perf_event *event, 313 bool sample_id_all __maybe_unused) 314 { 315 struct perf_event_header *hdr = &event->header; 316 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 317 } 318 319 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 320 { 321 event->comm.pid = bswap_32(event->comm.pid); 322 event->comm.tid = bswap_32(event->comm.tid); 323 324 if (sample_id_all) { 325 void *data = &event->comm.comm; 326 327 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 328 swap_sample_id_all(event, data); 329 } 330 } 331 332 static void perf_event__mmap_swap(union perf_event *event, 333 bool sample_id_all) 334 { 335 event->mmap.pid = bswap_32(event->mmap.pid); 336 event->mmap.tid = bswap_32(event->mmap.tid); 337 event->mmap.start = bswap_64(event->mmap.start); 338 event->mmap.len = bswap_64(event->mmap.len); 339 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 340 341 if (sample_id_all) { 342 void *data = &event->mmap.filename; 343 344 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 345 swap_sample_id_all(event, data); 346 } 347 } 348 349 static void perf_event__mmap2_swap(union perf_event *event, 350 bool sample_id_all) 351 { 352 event->mmap2.pid = bswap_32(event->mmap2.pid); 353 event->mmap2.tid = bswap_32(event->mmap2.tid); 354 event->mmap2.start = bswap_64(event->mmap2.start); 355 event->mmap2.len = bswap_64(event->mmap2.len); 356 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 357 event->mmap2.maj = bswap_32(event->mmap2.maj); 358 event->mmap2.min = bswap_32(event->mmap2.min); 359 event->mmap2.ino = bswap_64(event->mmap2.ino); 360 361 if (sample_id_all) { 362 void *data = &event->mmap2.filename; 363 364 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 365 swap_sample_id_all(event, data); 366 } 367 } 368 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 369 { 370 event->fork.pid = bswap_32(event->fork.pid); 371 event->fork.tid = bswap_32(event->fork.tid); 372 event->fork.ppid = bswap_32(event->fork.ppid); 373 event->fork.ptid = bswap_32(event->fork.ptid); 374 event->fork.time = bswap_64(event->fork.time); 375 376 if (sample_id_all) 377 swap_sample_id_all(event, &event->fork + 1); 378 } 379 380 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 381 { 382 event->read.pid = bswap_32(event->read.pid); 383 event->read.tid = bswap_32(event->read.tid); 384 event->read.value = bswap_64(event->read.value); 385 event->read.time_enabled = bswap_64(event->read.time_enabled); 386 event->read.time_running = bswap_64(event->read.time_running); 387 event->read.id = bswap_64(event->read.id); 388 389 if (sample_id_all) 390 swap_sample_id_all(event, &event->read + 1); 391 } 392 393 static void perf_event__throttle_swap(union perf_event *event, 394 bool sample_id_all) 395 { 396 event->throttle.time = bswap_64(event->throttle.time); 397 event->throttle.id = bswap_64(event->throttle.id); 398 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 399 400 if (sample_id_all) 401 swap_sample_id_all(event, &event->throttle + 1); 402 } 403 404 static u8 revbyte(u8 b) 405 { 406 int rev = (b >> 4) | ((b & 0xf) << 4); 407 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 408 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 409 return (u8) rev; 410 } 411 412 /* 413 * XXX this is hack in attempt to carry flags bitfield 414 * throught endian village. ABI says: 415 * 416 * Bit-fields are allocated from right to left (least to most significant) 417 * on little-endian implementations and from left to right (most to least 418 * significant) on big-endian implementations. 419 * 420 * The above seems to be byte specific, so we need to reverse each 421 * byte of the bitfield. 'Internet' also says this might be implementation 422 * specific and we probably need proper fix and carry perf_event_attr 423 * bitfield flags in separate data file FEAT_ section. Thought this seems 424 * to work for now. 425 */ 426 static void swap_bitfield(u8 *p, unsigned len) 427 { 428 unsigned i; 429 430 for (i = 0; i < len; i++) { 431 *p = revbyte(*p); 432 p++; 433 } 434 } 435 436 /* exported for swapping attributes in file header */ 437 void perf_event__attr_swap(struct perf_event_attr *attr) 438 { 439 attr->type = bswap_32(attr->type); 440 attr->size = bswap_32(attr->size); 441 attr->config = bswap_64(attr->config); 442 attr->sample_period = bswap_64(attr->sample_period); 443 attr->sample_type = bswap_64(attr->sample_type); 444 attr->read_format = bswap_64(attr->read_format); 445 attr->wakeup_events = bswap_32(attr->wakeup_events); 446 attr->bp_type = bswap_32(attr->bp_type); 447 attr->bp_addr = bswap_64(attr->bp_addr); 448 attr->bp_len = bswap_64(attr->bp_len); 449 attr->branch_sample_type = bswap_64(attr->branch_sample_type); 450 attr->sample_regs_user = bswap_64(attr->sample_regs_user); 451 attr->sample_stack_user = bswap_32(attr->sample_stack_user); 452 453 swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64)); 454 } 455 456 static void perf_event__hdr_attr_swap(union perf_event *event, 457 bool sample_id_all __maybe_unused) 458 { 459 size_t size; 460 461 perf_event__attr_swap(&event->attr.attr); 462 463 size = event->header.size; 464 size -= (void *)&event->attr.id - (void *)event; 465 mem_bswap_64(event->attr.id, size); 466 } 467 468 static void perf_event__event_type_swap(union perf_event *event, 469 bool sample_id_all __maybe_unused) 470 { 471 event->event_type.event_type.event_id = 472 bswap_64(event->event_type.event_type.event_id); 473 } 474 475 static void perf_event__tracing_data_swap(union perf_event *event, 476 bool sample_id_all __maybe_unused) 477 { 478 event->tracing_data.size = bswap_32(event->tracing_data.size); 479 } 480 481 typedef void (*perf_event__swap_op)(union perf_event *event, 482 bool sample_id_all); 483 484 static perf_event__swap_op perf_event__swap_ops[] = { 485 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 486 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 487 [PERF_RECORD_COMM] = perf_event__comm_swap, 488 [PERF_RECORD_FORK] = perf_event__task_swap, 489 [PERF_RECORD_EXIT] = perf_event__task_swap, 490 [PERF_RECORD_LOST] = perf_event__all64_swap, 491 [PERF_RECORD_READ] = perf_event__read_swap, 492 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 493 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 494 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 495 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 496 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 497 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 498 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 499 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 500 [PERF_RECORD_HEADER_MAX] = NULL, 501 }; 502 503 /* 504 * When perf record finishes a pass on every buffers, it records this pseudo 505 * event. 506 * We record the max timestamp t found in the pass n. 507 * Assuming these timestamps are monotonic across cpus, we know that if 508 * a buffer still has events with timestamps below t, they will be all 509 * available and then read in the pass n + 1. 510 * Hence when we start to read the pass n + 2, we can safely flush every 511 * events with timestamps below t. 512 * 513 * ============ PASS n ================= 514 * CPU 0 | CPU 1 515 * | 516 * cnt1 timestamps | cnt2 timestamps 517 * 1 | 2 518 * 2 | 3 519 * - | 4 <--- max recorded 520 * 521 * ============ PASS n + 1 ============== 522 * CPU 0 | CPU 1 523 * | 524 * cnt1 timestamps | cnt2 timestamps 525 * 3 | 5 526 * 4 | 6 527 * 5 | 7 <---- max recorded 528 * 529 * Flush every events below timestamp 4 530 * 531 * ============ PASS n + 2 ============== 532 * CPU 0 | CPU 1 533 * | 534 * cnt1 timestamps | cnt2 timestamps 535 * 6 | 8 536 * 7 | 9 537 * - | 10 538 * 539 * Flush every events below timestamp 7 540 * etc... 541 */ 542 static int process_finished_round(struct perf_tool *tool __maybe_unused, 543 union perf_event *event __maybe_unused, 544 struct ordered_events *oe) 545 { 546 return ordered_events__flush(oe, OE_FLUSH__ROUND); 547 } 548 549 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 550 struct perf_sample *sample, u64 file_offset) 551 { 552 return ordered_events__queue(&s->ordered_events, event, sample, file_offset); 553 } 554 555 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 556 { 557 struct ip_callchain *callchain = sample->callchain; 558 struct branch_stack *lbr_stack = sample->branch_stack; 559 u64 kernel_callchain_nr = callchain->nr; 560 unsigned int i; 561 562 for (i = 0; i < kernel_callchain_nr; i++) { 563 if (callchain->ips[i] == PERF_CONTEXT_USER) 564 break; 565 } 566 567 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 568 u64 total_nr; 569 /* 570 * LBR callstack can only get user call chain, 571 * i is kernel call chain number, 572 * 1 is PERF_CONTEXT_USER. 573 * 574 * The user call chain is stored in LBR registers. 575 * LBR are pair registers. The caller is stored 576 * in "from" register, while the callee is stored 577 * in "to" register. 578 * For example, there is a call stack 579 * "A"->"B"->"C"->"D". 580 * The LBR registers will recorde like 581 * "C"->"D", "B"->"C", "A"->"B". 582 * So only the first "to" register and all "from" 583 * registers are needed to construct the whole stack. 584 */ 585 total_nr = i + 1 + lbr_stack->nr + 1; 586 kernel_callchain_nr = i + 1; 587 588 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 589 590 for (i = 0; i < kernel_callchain_nr; i++) 591 printf("..... %2d: %016" PRIx64 "\n", 592 i, callchain->ips[i]); 593 594 printf("..... %2d: %016" PRIx64 "\n", 595 (int)(kernel_callchain_nr), lbr_stack->entries[0].to); 596 for (i = 0; i < lbr_stack->nr; i++) 597 printf("..... %2d: %016" PRIx64 "\n", 598 (int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from); 599 } 600 } 601 602 static void callchain__printf(struct perf_evsel *evsel, 603 struct perf_sample *sample) 604 { 605 unsigned int i; 606 struct ip_callchain *callchain = sample->callchain; 607 608 if (has_branch_callstack(evsel)) 609 callchain__lbr_callstack_printf(sample); 610 611 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 612 613 for (i = 0; i < callchain->nr; i++) 614 printf("..... %2d: %016" PRIx64 "\n", 615 i, callchain->ips[i]); 616 } 617 618 static void branch_stack__printf(struct perf_sample *sample) 619 { 620 uint64_t i; 621 622 printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr); 623 624 for (i = 0; i < sample->branch_stack->nr; i++) 625 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n", 626 i, sample->branch_stack->entries[i].from, 627 sample->branch_stack->entries[i].to); 628 } 629 630 static void regs_dump__printf(u64 mask, u64 *regs) 631 { 632 unsigned rid, i = 0; 633 634 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 635 u64 val = regs[i++]; 636 637 printf(".... %-5s 0x%" PRIx64 "\n", 638 perf_reg_name(rid), val); 639 } 640 } 641 642 static const char *regs_abi[] = { 643 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 644 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 645 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 646 }; 647 648 static inline const char *regs_dump_abi(struct regs_dump *d) 649 { 650 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 651 return "unknown"; 652 653 return regs_abi[d->abi]; 654 } 655 656 static void regs__printf(const char *type, struct regs_dump *regs) 657 { 658 u64 mask = regs->mask; 659 660 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 661 type, 662 mask, 663 regs_dump_abi(regs)); 664 665 regs_dump__printf(mask, regs->regs); 666 } 667 668 static void regs_user__printf(struct perf_sample *sample) 669 { 670 struct regs_dump *user_regs = &sample->user_regs; 671 672 if (user_regs->regs) 673 regs__printf("user", user_regs); 674 } 675 676 static void regs_intr__printf(struct perf_sample *sample) 677 { 678 struct regs_dump *intr_regs = &sample->intr_regs; 679 680 if (intr_regs->regs) 681 regs__printf("intr", intr_regs); 682 } 683 684 static void stack_user__printf(struct stack_dump *dump) 685 { 686 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 687 dump->size, dump->offset); 688 } 689 690 static void perf_evlist__print_tstamp(struct perf_evlist *evlist, 691 union perf_event *event, 692 struct perf_sample *sample) 693 { 694 u64 sample_type = __perf_evlist__combined_sample_type(evlist); 695 696 if (event->header.type != PERF_RECORD_SAMPLE && 697 !perf_evlist__sample_id_all(evlist)) { 698 fputs("-1 -1 ", stdout); 699 return; 700 } 701 702 if ((sample_type & PERF_SAMPLE_CPU)) 703 printf("%u ", sample->cpu); 704 705 if (sample_type & PERF_SAMPLE_TIME) 706 printf("%" PRIu64 " ", sample->time); 707 } 708 709 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 710 { 711 printf("... sample_read:\n"); 712 713 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 714 printf("...... time enabled %016" PRIx64 "\n", 715 sample->read.time_enabled); 716 717 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 718 printf("...... time running %016" PRIx64 "\n", 719 sample->read.time_running); 720 721 if (read_format & PERF_FORMAT_GROUP) { 722 u64 i; 723 724 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 725 726 for (i = 0; i < sample->read.group.nr; i++) { 727 struct sample_read_value *value; 728 729 value = &sample->read.group.values[i]; 730 printf("..... id %016" PRIx64 731 ", value %016" PRIx64 "\n", 732 value->id, value->value); 733 } 734 } else 735 printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n", 736 sample->read.one.id, sample->read.one.value); 737 } 738 739 static void dump_event(struct perf_evlist *evlist, union perf_event *event, 740 u64 file_offset, struct perf_sample *sample) 741 { 742 if (!dump_trace) 743 return; 744 745 printf("\n%#" PRIx64 " [%#x]: event: %d\n", 746 file_offset, event->header.size, event->header.type); 747 748 trace_event(event); 749 750 if (sample) 751 perf_evlist__print_tstamp(evlist, event, sample); 752 753 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 754 event->header.size, perf_event__name(event->header.type)); 755 } 756 757 static void dump_sample(struct perf_evsel *evsel, union perf_event *event, 758 struct perf_sample *sample) 759 { 760 u64 sample_type; 761 762 if (!dump_trace) 763 return; 764 765 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 766 event->header.misc, sample->pid, sample->tid, sample->ip, 767 sample->period, sample->addr); 768 769 sample_type = evsel->attr.sample_type; 770 771 if (sample_type & PERF_SAMPLE_CALLCHAIN) 772 callchain__printf(evsel, sample); 773 774 if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel)) 775 branch_stack__printf(sample); 776 777 if (sample_type & PERF_SAMPLE_REGS_USER) 778 regs_user__printf(sample); 779 780 if (sample_type & PERF_SAMPLE_REGS_INTR) 781 regs_intr__printf(sample); 782 783 if (sample_type & PERF_SAMPLE_STACK_USER) 784 stack_user__printf(&sample->user_stack); 785 786 if (sample_type & PERF_SAMPLE_WEIGHT) 787 printf("... weight: %" PRIu64 "\n", sample->weight); 788 789 if (sample_type & PERF_SAMPLE_DATA_SRC) 790 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 791 792 if (sample_type & PERF_SAMPLE_TRANSACTION) 793 printf("... transaction: %" PRIx64 "\n", sample->transaction); 794 795 if (sample_type & PERF_SAMPLE_READ) 796 sample_read__printf(sample, evsel->attr.read_format); 797 } 798 799 static struct machine *machines__find_for_cpumode(struct machines *machines, 800 union perf_event *event, 801 struct perf_sample *sample) 802 { 803 const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 804 struct machine *machine; 805 806 if (perf_guest && 807 ((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 808 (cpumode == PERF_RECORD_MISC_GUEST_USER))) { 809 u32 pid; 810 811 if (event->header.type == PERF_RECORD_MMAP 812 || event->header.type == PERF_RECORD_MMAP2) 813 pid = event->mmap.pid; 814 else 815 pid = sample->pid; 816 817 machine = machines__find(machines, pid); 818 if (!machine) 819 machine = machines__find(machines, DEFAULT_GUEST_KERNEL_ID); 820 return machine; 821 } 822 823 return &machines->host; 824 } 825 826 static int deliver_sample_value(struct perf_evlist *evlist, 827 struct perf_tool *tool, 828 union perf_event *event, 829 struct perf_sample *sample, 830 struct sample_read_value *v, 831 struct machine *machine) 832 { 833 struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id); 834 835 if (sid) { 836 sample->id = v->id; 837 sample->period = v->value - sid->period; 838 sid->period = v->value; 839 } 840 841 if (!sid || sid->evsel == NULL) { 842 ++evlist->stats.nr_unknown_id; 843 return 0; 844 } 845 846 return tool->sample(tool, event, sample, sid->evsel, machine); 847 } 848 849 static int deliver_sample_group(struct perf_evlist *evlist, 850 struct perf_tool *tool, 851 union perf_event *event, 852 struct perf_sample *sample, 853 struct machine *machine) 854 { 855 int ret = -EINVAL; 856 u64 i; 857 858 for (i = 0; i < sample->read.group.nr; i++) { 859 ret = deliver_sample_value(evlist, tool, event, sample, 860 &sample->read.group.values[i], 861 machine); 862 if (ret) 863 break; 864 } 865 866 return ret; 867 } 868 869 static int 870 perf_evlist__deliver_sample(struct perf_evlist *evlist, 871 struct perf_tool *tool, 872 union perf_event *event, 873 struct perf_sample *sample, 874 struct perf_evsel *evsel, 875 struct machine *machine) 876 { 877 /* We know evsel != NULL. */ 878 u64 sample_type = evsel->attr.sample_type; 879 u64 read_format = evsel->attr.read_format; 880 881 /* Standard sample delievery. */ 882 if (!(sample_type & PERF_SAMPLE_READ)) 883 return tool->sample(tool, event, sample, evsel, machine); 884 885 /* For PERF_SAMPLE_READ we have either single or group mode. */ 886 if (read_format & PERF_FORMAT_GROUP) 887 return deliver_sample_group(evlist, tool, event, sample, 888 machine); 889 else 890 return deliver_sample_value(evlist, tool, event, sample, 891 &sample->read.one, machine); 892 } 893 894 static int machines__deliver_event(struct machines *machines, 895 struct perf_evlist *evlist, 896 union perf_event *event, 897 struct perf_sample *sample, 898 struct perf_tool *tool, u64 file_offset) 899 { 900 struct perf_evsel *evsel; 901 struct machine *machine; 902 903 dump_event(evlist, event, file_offset, sample); 904 905 evsel = perf_evlist__id2evsel(evlist, sample->id); 906 907 machine = machines__find_for_cpumode(machines, event, sample); 908 909 switch (event->header.type) { 910 case PERF_RECORD_SAMPLE: 911 dump_sample(evsel, event, sample); 912 if (evsel == NULL) { 913 ++evlist->stats.nr_unknown_id; 914 return 0; 915 } 916 if (machine == NULL) { 917 ++evlist->stats.nr_unprocessable_samples; 918 return 0; 919 } 920 return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 921 case PERF_RECORD_MMAP: 922 return tool->mmap(tool, event, sample, machine); 923 case PERF_RECORD_MMAP2: 924 return tool->mmap2(tool, event, sample, machine); 925 case PERF_RECORD_COMM: 926 return tool->comm(tool, event, sample, machine); 927 case PERF_RECORD_FORK: 928 return tool->fork(tool, event, sample, machine); 929 case PERF_RECORD_EXIT: 930 return tool->exit(tool, event, sample, machine); 931 case PERF_RECORD_LOST: 932 if (tool->lost == perf_event__process_lost) 933 evlist->stats.total_lost += event->lost.lost; 934 return tool->lost(tool, event, sample, machine); 935 case PERF_RECORD_READ: 936 return tool->read(tool, event, sample, evsel, machine); 937 case PERF_RECORD_THROTTLE: 938 return tool->throttle(tool, event, sample, machine); 939 case PERF_RECORD_UNTHROTTLE: 940 return tool->unthrottle(tool, event, sample, machine); 941 default: 942 ++evlist->stats.nr_unknown_events; 943 return -1; 944 } 945 } 946 947 static s64 perf_session__process_user_event(struct perf_session *session, 948 union perf_event *event, 949 u64 file_offset) 950 { 951 struct ordered_events *oe = &session->ordered_events; 952 struct perf_tool *tool = session->tool; 953 int fd = perf_data_file__fd(session->file); 954 int err; 955 956 dump_event(session->evlist, 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, oe); 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 { 992 struct perf_evlist *evlist = session->evlist; 993 struct perf_tool *tool = session->tool; 994 995 events_stats__inc(&evlist->stats, event->header.type); 996 997 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 998 return perf_session__process_user_event(session, event, 0); 999 1000 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0); 1001 } 1002 1003 static void event_swap(union perf_event *event, bool sample_id_all) 1004 { 1005 perf_event__swap_op swap; 1006 1007 swap = perf_event__swap_ops[event->header.type]; 1008 if (swap) 1009 swap(event, sample_id_all); 1010 } 1011 1012 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1013 void *buf, size_t buf_sz, 1014 union perf_event **event_ptr, 1015 struct perf_sample *sample) 1016 { 1017 union perf_event *event; 1018 size_t hdr_sz, rest; 1019 int fd; 1020 1021 if (session->one_mmap && !session->header.needs_swap) { 1022 event = file_offset - session->one_mmap_offset + 1023 session->one_mmap_addr; 1024 goto out_parse_sample; 1025 } 1026 1027 if (perf_data_file__is_pipe(session->file)) 1028 return -1; 1029 1030 fd = perf_data_file__fd(session->file); 1031 hdr_sz = sizeof(struct perf_event_header); 1032 1033 if (buf_sz < hdr_sz) 1034 return -1; 1035 1036 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1037 readn(fd, &buf, hdr_sz) != (ssize_t)hdr_sz) 1038 return -1; 1039 1040 event = (union perf_event *)buf; 1041 1042 if (session->header.needs_swap) 1043 perf_event_header__bswap(&event->header); 1044 1045 if (event->header.size < hdr_sz) 1046 return -1; 1047 1048 rest = event->header.size - hdr_sz; 1049 1050 if (readn(fd, &buf, rest) != (ssize_t)rest) 1051 return -1; 1052 1053 if (session->header.needs_swap) 1054 event_swap(event, perf_evlist__sample_id_all(session->evlist)); 1055 1056 out_parse_sample: 1057 1058 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1059 perf_evlist__parse_sample(session->evlist, event, sample)) 1060 return -1; 1061 1062 *event_ptr = event; 1063 1064 return 0; 1065 } 1066 1067 static s64 perf_session__process_event(struct perf_session *session, 1068 union perf_event *event, u64 file_offset) 1069 { 1070 struct perf_evlist *evlist = session->evlist; 1071 struct perf_tool *tool = session->tool; 1072 struct perf_sample sample; 1073 int ret; 1074 1075 if (session->header.needs_swap) 1076 event_swap(event, perf_evlist__sample_id_all(evlist)); 1077 1078 if (event->header.type >= PERF_RECORD_HEADER_MAX) 1079 return -EINVAL; 1080 1081 events_stats__inc(&evlist->stats, event->header.type); 1082 1083 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1084 return perf_session__process_user_event(session, event, file_offset); 1085 1086 /* 1087 * For all kernel events we get the sample data 1088 */ 1089 ret = perf_evlist__parse_sample(evlist, event, &sample); 1090 if (ret) 1091 return ret; 1092 1093 if (tool->ordered_events) { 1094 ret = perf_session__queue_event(session, event, &sample, file_offset); 1095 if (ret != -ETIME) 1096 return ret; 1097 } 1098 1099 return machines__deliver_event(&session->machines, evlist, event, 1100 &sample, tool, 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_session__warn_about_errors(const struct perf_session *session) 1129 { 1130 const struct events_stats *stats = &session->evlist->stats; 1131 const struct ordered_events *oe = &session->ordered_events; 1132 1133 if (session->tool->lost == perf_event__process_lost && 1134 stats->nr_events[PERF_RECORD_LOST] != 0) { 1135 ui__warning("Processed %d events and lost %d chunks!\n\n" 1136 "Check IO/CPU overload!\n\n", 1137 stats->nr_events[0], 1138 stats->nr_events[PERF_RECORD_LOST]); 1139 } 1140 1141 if (stats->nr_unknown_events != 0) { 1142 ui__warning("Found %u unknown events!\n\n" 1143 "Is this an older tool processing a perf.data " 1144 "file generated by a more recent tool?\n\n" 1145 "If that is not the case, consider " 1146 "reporting to linux-kernel@vger.kernel.org.\n\n", 1147 stats->nr_unknown_events); 1148 } 1149 1150 if (stats->nr_unknown_id != 0) { 1151 ui__warning("%u samples with id not present in the header\n", 1152 stats->nr_unknown_id); 1153 } 1154 1155 if (stats->nr_invalid_chains != 0) { 1156 ui__warning("Found invalid callchains!\n\n" 1157 "%u out of %u events were discarded for this reason.\n\n" 1158 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1159 stats->nr_invalid_chains, 1160 stats->nr_events[PERF_RECORD_SAMPLE]); 1161 } 1162 1163 if (stats->nr_unprocessable_samples != 0) { 1164 ui__warning("%u unprocessable samples recorded.\n" 1165 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1166 stats->nr_unprocessable_samples); 1167 } 1168 1169 if (oe->nr_unordered_events != 0) 1170 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1171 } 1172 1173 volatile int session_done; 1174 1175 static int __perf_session__process_pipe_events(struct perf_session *session) 1176 { 1177 struct ordered_events *oe = &session->ordered_events; 1178 struct perf_tool *tool = session->tool; 1179 int fd = perf_data_file__fd(session->file); 1180 union perf_event *event; 1181 uint32_t size, cur_size = 0; 1182 void *buf = NULL; 1183 s64 skip = 0; 1184 u64 head; 1185 ssize_t err; 1186 void *p; 1187 1188 perf_tool__fill_defaults(tool); 1189 1190 head = 0; 1191 cur_size = sizeof(union perf_event); 1192 1193 buf = malloc(cur_size); 1194 if (!buf) 1195 return -errno; 1196 more: 1197 event = buf; 1198 err = readn(fd, event, sizeof(struct perf_event_header)); 1199 if (err <= 0) { 1200 if (err == 0) 1201 goto done; 1202 1203 pr_err("failed to read event header\n"); 1204 goto out_err; 1205 } 1206 1207 if (session->header.needs_swap) 1208 perf_event_header__bswap(&event->header); 1209 1210 size = event->header.size; 1211 if (size < sizeof(struct perf_event_header)) { 1212 pr_err("bad event header size\n"); 1213 goto out_err; 1214 } 1215 1216 if (size > cur_size) { 1217 void *new = realloc(buf, size); 1218 if (!new) { 1219 pr_err("failed to allocate memory to read event\n"); 1220 goto out_err; 1221 } 1222 buf = new; 1223 cur_size = size; 1224 event = buf; 1225 } 1226 p = event; 1227 p += sizeof(struct perf_event_header); 1228 1229 if (size - sizeof(struct perf_event_header)) { 1230 err = readn(fd, p, size - sizeof(struct perf_event_header)); 1231 if (err <= 0) { 1232 if (err == 0) { 1233 pr_err("unexpected end of event stream\n"); 1234 goto done; 1235 } 1236 1237 pr_err("failed to read event data\n"); 1238 goto out_err; 1239 } 1240 } 1241 1242 if ((skip = perf_session__process_event(session, event, head)) < 0) { 1243 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1244 head, event->header.size, event->header.type); 1245 err = -EINVAL; 1246 goto out_err; 1247 } 1248 1249 head += size; 1250 1251 if (skip > 0) 1252 head += skip; 1253 1254 if (!session_done()) 1255 goto more; 1256 done: 1257 /* do the final flush for ordered samples */ 1258 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1259 out_err: 1260 free(buf); 1261 perf_session__warn_about_errors(session); 1262 ordered_events__free(&session->ordered_events); 1263 return err; 1264 } 1265 1266 static union perf_event * 1267 fetch_mmaped_event(struct perf_session *session, 1268 u64 head, size_t mmap_size, char *buf) 1269 { 1270 union perf_event *event; 1271 1272 /* 1273 * Ensure we have enough space remaining to read 1274 * the size of the event in the headers. 1275 */ 1276 if (head + sizeof(event->header) > mmap_size) 1277 return NULL; 1278 1279 event = (union perf_event *)(buf + head); 1280 1281 if (session->header.needs_swap) 1282 perf_event_header__bswap(&event->header); 1283 1284 if (head + event->header.size > mmap_size) { 1285 /* We're not fetching the event so swap back again */ 1286 if (session->header.needs_swap) 1287 perf_event_header__bswap(&event->header); 1288 return NULL; 1289 } 1290 1291 return event; 1292 } 1293 1294 /* 1295 * On 64bit we can mmap the data file in one go. No need for tiny mmap 1296 * slices. On 32bit we use 32MB. 1297 */ 1298 #if BITS_PER_LONG == 64 1299 #define MMAP_SIZE ULLONG_MAX 1300 #define NUM_MMAPS 1 1301 #else 1302 #define MMAP_SIZE (32 * 1024 * 1024ULL) 1303 #define NUM_MMAPS 128 1304 #endif 1305 1306 static int __perf_session__process_events(struct perf_session *session, 1307 u64 data_offset, u64 data_size, 1308 u64 file_size) 1309 { 1310 struct ordered_events *oe = &session->ordered_events; 1311 struct perf_tool *tool = session->tool; 1312 int fd = perf_data_file__fd(session->file); 1313 u64 head, page_offset, file_offset, file_pos, size; 1314 int err, mmap_prot, mmap_flags, map_idx = 0; 1315 size_t mmap_size; 1316 char *buf, *mmaps[NUM_MMAPS]; 1317 union perf_event *event; 1318 struct ui_progress prog; 1319 s64 skip; 1320 1321 perf_tool__fill_defaults(tool); 1322 1323 page_offset = page_size * (data_offset / page_size); 1324 file_offset = page_offset; 1325 head = data_offset - page_offset; 1326 1327 if (data_size && (data_offset + data_size < file_size)) 1328 file_size = data_offset + data_size; 1329 1330 ui_progress__init(&prog, file_size, "Processing events..."); 1331 1332 mmap_size = MMAP_SIZE; 1333 if (mmap_size > file_size) { 1334 mmap_size = file_size; 1335 session->one_mmap = true; 1336 } 1337 1338 memset(mmaps, 0, sizeof(mmaps)); 1339 1340 mmap_prot = PROT_READ; 1341 mmap_flags = MAP_SHARED; 1342 1343 if (session->header.needs_swap) { 1344 mmap_prot |= PROT_WRITE; 1345 mmap_flags = MAP_PRIVATE; 1346 } 1347 remap: 1348 buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, fd, 1349 file_offset); 1350 if (buf == MAP_FAILED) { 1351 pr_err("failed to mmap file\n"); 1352 err = -errno; 1353 goto out_err; 1354 } 1355 mmaps[map_idx] = buf; 1356 map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1); 1357 file_pos = file_offset + head; 1358 if (session->one_mmap) { 1359 session->one_mmap_addr = buf; 1360 session->one_mmap_offset = file_offset; 1361 } 1362 1363 more: 1364 event = fetch_mmaped_event(session, head, mmap_size, buf); 1365 if (!event) { 1366 if (mmaps[map_idx]) { 1367 munmap(mmaps[map_idx], mmap_size); 1368 mmaps[map_idx] = NULL; 1369 } 1370 1371 page_offset = page_size * (head / page_size); 1372 file_offset += page_offset; 1373 head -= page_offset; 1374 goto remap; 1375 } 1376 1377 size = event->header.size; 1378 1379 if (size < sizeof(struct perf_event_header) || 1380 (skip = perf_session__process_event(session, event, file_pos)) < 0) { 1381 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1382 file_offset + head, event->header.size, 1383 event->header.type); 1384 err = -EINVAL; 1385 goto out_err; 1386 } 1387 1388 if (skip) 1389 size += skip; 1390 1391 head += size; 1392 file_pos += size; 1393 1394 ui_progress__update(&prog, size); 1395 1396 if (session_done()) 1397 goto out; 1398 1399 if (file_pos < file_size) 1400 goto more; 1401 1402 out: 1403 /* do the final flush for ordered samples */ 1404 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1405 out_err: 1406 ui_progress__finish(); 1407 perf_session__warn_about_errors(session); 1408 ordered_events__free(&session->ordered_events); 1409 session->one_mmap = false; 1410 return err; 1411 } 1412 1413 int perf_session__process_events(struct perf_session *session) 1414 { 1415 u64 size = perf_data_file__size(session->file); 1416 int err; 1417 1418 if (perf_session__register_idle_thread(session) == NULL) 1419 return -ENOMEM; 1420 1421 if (!perf_data_file__is_pipe(session->file)) 1422 err = __perf_session__process_events(session, 1423 session->header.data_offset, 1424 session->header.data_size, size); 1425 else 1426 err = __perf_session__process_pipe_events(session); 1427 1428 return err; 1429 } 1430 1431 bool perf_session__has_traces(struct perf_session *session, const char *msg) 1432 { 1433 struct perf_evsel *evsel; 1434 1435 evlist__for_each(session->evlist, evsel) { 1436 if (evsel->attr.type == PERF_TYPE_TRACEPOINT) 1437 return true; 1438 } 1439 1440 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 1441 return false; 1442 } 1443 1444 int maps__set_kallsyms_ref_reloc_sym(struct map **maps, 1445 const char *symbol_name, u64 addr) 1446 { 1447 char *bracket; 1448 enum map_type i; 1449 struct ref_reloc_sym *ref; 1450 1451 ref = zalloc(sizeof(struct ref_reloc_sym)); 1452 if (ref == NULL) 1453 return -ENOMEM; 1454 1455 ref->name = strdup(symbol_name); 1456 if (ref->name == NULL) { 1457 free(ref); 1458 return -ENOMEM; 1459 } 1460 1461 bracket = strchr(ref->name, ']'); 1462 if (bracket) 1463 *bracket = '\0'; 1464 1465 ref->addr = addr; 1466 1467 for (i = 0; i < MAP__NR_TYPES; ++i) { 1468 struct kmap *kmap = map__kmap(maps[i]); 1469 kmap->ref_reloc_sym = ref; 1470 } 1471 1472 return 0; 1473 } 1474 1475 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 1476 { 1477 return machines__fprintf_dsos(&session->machines, fp); 1478 } 1479 1480 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 1481 bool (skip)(struct dso *dso, int parm), int parm) 1482 { 1483 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 1484 } 1485 1486 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 1487 { 1488 size_t ret = fprintf(fp, "Aggregated stats:\n"); 1489 1490 ret += events_stats__fprintf(&session->evlist->stats, fp); 1491 return ret; 1492 } 1493 1494 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 1495 { 1496 /* 1497 * FIXME: Here we have to actually print all the machines in this 1498 * session, not just the host... 1499 */ 1500 return machine__fprintf(&session->machines.host, fp); 1501 } 1502 1503 struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session, 1504 unsigned int type) 1505 { 1506 struct perf_evsel *pos; 1507 1508 evlist__for_each(session->evlist, pos) { 1509 if (pos->attr.type == type) 1510 return pos; 1511 } 1512 return NULL; 1513 } 1514 1515 void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample, 1516 struct addr_location *al, 1517 unsigned int print_opts, unsigned int stack_depth) 1518 { 1519 struct callchain_cursor_node *node; 1520 int print_ip = print_opts & PRINT_IP_OPT_IP; 1521 int print_sym = print_opts & PRINT_IP_OPT_SYM; 1522 int print_dso = print_opts & PRINT_IP_OPT_DSO; 1523 int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET; 1524 int print_oneline = print_opts & PRINT_IP_OPT_ONELINE; 1525 int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE; 1526 char s = print_oneline ? ' ' : '\t'; 1527 1528 if (symbol_conf.use_callchain && sample->callchain) { 1529 struct addr_location node_al; 1530 1531 if (thread__resolve_callchain(al->thread, evsel, 1532 sample, NULL, NULL, 1533 PERF_MAX_STACK_DEPTH) != 0) { 1534 if (verbose) 1535 error("Failed to resolve callchain. Skipping\n"); 1536 return; 1537 } 1538 callchain_cursor_commit(&callchain_cursor); 1539 1540 if (print_symoffset) 1541 node_al = *al; 1542 1543 while (stack_depth) { 1544 u64 addr = 0; 1545 1546 node = callchain_cursor_current(&callchain_cursor); 1547 if (!node) 1548 break; 1549 1550 if (node->sym && node->sym->ignore) 1551 goto next; 1552 1553 if (print_ip) 1554 printf("%c%16" PRIx64, s, node->ip); 1555 1556 if (node->map) 1557 addr = node->map->map_ip(node->map, node->ip); 1558 1559 if (print_sym) { 1560 printf(" "); 1561 if (print_symoffset) { 1562 node_al.addr = addr; 1563 node_al.map = node->map; 1564 symbol__fprintf_symname_offs(node->sym, &node_al, stdout); 1565 } else 1566 symbol__fprintf_symname(node->sym, stdout); 1567 } 1568 1569 if (print_dso) { 1570 printf(" ("); 1571 map__fprintf_dsoname(node->map, stdout); 1572 printf(")"); 1573 } 1574 1575 if (print_srcline) 1576 map__fprintf_srcline(node->map, addr, "\n ", 1577 stdout); 1578 1579 if (!print_oneline) 1580 printf("\n"); 1581 1582 stack_depth--; 1583 next: 1584 callchain_cursor_advance(&callchain_cursor); 1585 } 1586 1587 } else { 1588 if (al->sym && al->sym->ignore) 1589 return; 1590 1591 if (print_ip) 1592 printf("%16" PRIx64, sample->ip); 1593 1594 if (print_sym) { 1595 printf(" "); 1596 if (print_symoffset) 1597 symbol__fprintf_symname_offs(al->sym, al, 1598 stdout); 1599 else 1600 symbol__fprintf_symname(al->sym, stdout); 1601 } 1602 1603 if (print_dso) { 1604 printf(" ("); 1605 map__fprintf_dsoname(al->map, stdout); 1606 printf(")"); 1607 } 1608 1609 if (print_srcline) 1610 map__fprintf_srcline(al->map, al->addr, "\n ", stdout); 1611 } 1612 } 1613 1614 int perf_session__cpu_bitmap(struct perf_session *session, 1615 const char *cpu_list, unsigned long *cpu_bitmap) 1616 { 1617 int i, err = -1; 1618 struct cpu_map *map; 1619 1620 for (i = 0; i < PERF_TYPE_MAX; ++i) { 1621 struct perf_evsel *evsel; 1622 1623 evsel = perf_session__find_first_evtype(session, i); 1624 if (!evsel) 1625 continue; 1626 1627 if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) { 1628 pr_err("File does not contain CPU events. " 1629 "Remove -c option to proceed.\n"); 1630 return -1; 1631 } 1632 } 1633 1634 map = cpu_map__new(cpu_list); 1635 if (map == NULL) { 1636 pr_err("Invalid cpu_list\n"); 1637 return -1; 1638 } 1639 1640 for (i = 0; i < map->nr; i++) { 1641 int cpu = map->map[i]; 1642 1643 if (cpu >= MAX_NR_CPUS) { 1644 pr_err("Requested CPU %d too large. " 1645 "Consider raising MAX_NR_CPUS\n", cpu); 1646 goto out_delete_map; 1647 } 1648 1649 set_bit(cpu, cpu_bitmap); 1650 } 1651 1652 err = 0; 1653 1654 out_delete_map: 1655 cpu_map__delete(map); 1656 return err; 1657 } 1658 1659 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 1660 bool full) 1661 { 1662 struct stat st; 1663 int fd, ret; 1664 1665 if (session == NULL || fp == NULL) 1666 return; 1667 1668 fd = perf_data_file__fd(session->file); 1669 1670 ret = fstat(fd, &st); 1671 if (ret == -1) 1672 return; 1673 1674 fprintf(fp, "# ========\n"); 1675 fprintf(fp, "# captured on: %s", ctime(&st.st_ctime)); 1676 perf_header__fprintf_info(session, fp, full); 1677 fprintf(fp, "# ========\n#\n"); 1678 } 1679 1680 1681 int __perf_session__set_tracepoints_handlers(struct perf_session *session, 1682 const struct perf_evsel_str_handler *assocs, 1683 size_t nr_assocs) 1684 { 1685 struct perf_evsel *evsel; 1686 size_t i; 1687 int err; 1688 1689 for (i = 0; i < nr_assocs; i++) { 1690 /* 1691 * Adding a handler for an event not in the session, 1692 * just ignore it. 1693 */ 1694 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name); 1695 if (evsel == NULL) 1696 continue; 1697 1698 err = -EEXIST; 1699 if (evsel->handler != NULL) 1700 goto out; 1701 evsel->handler = assocs[i].handler; 1702 } 1703 1704 err = 0; 1705 out: 1706 return err; 1707 } 1708 1709 int perf_event__process_id_index(struct perf_tool *tool __maybe_unused, 1710 union perf_event *event, 1711 struct perf_session *session) 1712 { 1713 struct perf_evlist *evlist = session->evlist; 1714 struct id_index_event *ie = &event->id_index; 1715 size_t i, nr, max_nr; 1716 1717 max_nr = (ie->header.size - sizeof(struct id_index_event)) / 1718 sizeof(struct id_index_entry); 1719 nr = ie->nr; 1720 if (nr > max_nr) 1721 return -EINVAL; 1722 1723 if (dump_trace) 1724 fprintf(stdout, " nr: %zu\n", nr); 1725 1726 for (i = 0; i < nr; i++) { 1727 struct id_index_entry *e = &ie->entries[i]; 1728 struct perf_sample_id *sid; 1729 1730 if (dump_trace) { 1731 fprintf(stdout, " ... id: %"PRIu64, e->id); 1732 fprintf(stdout, " idx: %"PRIu64, e->idx); 1733 fprintf(stdout, " cpu: %"PRId64, e->cpu); 1734 fprintf(stdout, " tid: %"PRId64"\n", e->tid); 1735 } 1736 1737 sid = perf_evlist__id2sid(evlist, e->id); 1738 if (!sid) 1739 return -ENOENT; 1740 sid->idx = e->idx; 1741 sid->cpu = e->cpu; 1742 sid->tid = e->tid; 1743 } 1744 return 0; 1745 } 1746 1747 int perf_event__synthesize_id_index(struct perf_tool *tool, 1748 perf_event__handler_t process, 1749 struct perf_evlist *evlist, 1750 struct machine *machine) 1751 { 1752 union perf_event *ev; 1753 struct perf_evsel *evsel; 1754 size_t nr = 0, i = 0, sz, max_nr, n; 1755 int err; 1756 1757 pr_debug2("Synthesizing id index\n"); 1758 1759 max_nr = (UINT16_MAX - sizeof(struct id_index_event)) / 1760 sizeof(struct id_index_entry); 1761 1762 evlist__for_each(evlist, evsel) 1763 nr += evsel->ids; 1764 1765 n = nr > max_nr ? max_nr : nr; 1766 sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry); 1767 ev = zalloc(sz); 1768 if (!ev) 1769 return -ENOMEM; 1770 1771 ev->id_index.header.type = PERF_RECORD_ID_INDEX; 1772 ev->id_index.header.size = sz; 1773 ev->id_index.nr = n; 1774 1775 evlist__for_each(evlist, evsel) { 1776 u32 j; 1777 1778 for (j = 0; j < evsel->ids; j++) { 1779 struct id_index_entry *e; 1780 struct perf_sample_id *sid; 1781 1782 if (i >= n) { 1783 err = process(tool, ev, NULL, machine); 1784 if (err) 1785 goto out_err; 1786 nr -= n; 1787 i = 0; 1788 } 1789 1790 e = &ev->id_index.entries[i++]; 1791 1792 e->id = evsel->id[j]; 1793 1794 sid = perf_evlist__id2sid(evlist, e->id); 1795 if (!sid) { 1796 free(ev); 1797 return -ENOENT; 1798 } 1799 1800 e->idx = sid->idx; 1801 e->cpu = sid->cpu; 1802 e->tid = sid->tid; 1803 } 1804 } 1805 1806 sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry); 1807 ev->id_index.header.size = sz; 1808 ev->id_index.nr = nr; 1809 1810 err = process(tool, ev, NULL, machine); 1811 out_err: 1812 free(ev); 1813 1814 return err; 1815 } 1816