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