1 // SPDX-License-Identifier: GPL-2.0 2 #include <errno.h> 3 #include <signal.h> 4 #include <inttypes.h> 5 #include <linux/err.h> 6 #include <linux/kernel.h> 7 #include <linux/zalloc.h> 8 #include <api/fs/fs.h> 9 10 #include <byteswap.h> 11 #include <unistd.h> 12 #include <sys/types.h> 13 #include <sys/mman.h> 14 #include <perf/cpumap.h> 15 #include <perf/event.h> 16 17 #include "map_symbol.h" 18 #include "branch.h" 19 #include "debug.h" 20 #include "env.h" 21 #include "evlist.h" 22 #include "evsel.h" 23 #include "memswap.h" 24 #include "map.h" 25 #include "symbol.h" 26 #include "session.h" 27 #include "tool.h" 28 #include "perf_regs.h" 29 #include "asm/bug.h" 30 #include "auxtrace.h" 31 #include "thread.h" 32 #include "thread-stack.h" 33 #include "sample-raw.h" 34 #include "stat.h" 35 #include "tsc.h" 36 #include "ui/progress.h" 37 #include "util.h" 38 #include "arch/common.h" 39 #include "units.h" 40 #include "annotate.h" 41 #include "perf.h" 42 #include <internal/lib.h> 43 44 static int perf_session__deliver_event(struct perf_session *session, 45 union perf_event *event, 46 const struct perf_tool *tool, 47 u64 file_offset, 48 const char *file_path); 49 50 static int perf_session__open(struct perf_session *session) 51 { 52 struct perf_data *data = session->data; 53 54 if (perf_session__read_header(session) < 0) { 55 pr_err("incompatible file format (rerun with -v to learn more)\n"); 56 return -1; 57 } 58 59 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) { 60 /* Auxiliary events may reference exited threads, hold onto dead ones. */ 61 symbol_conf.keep_exited_threads = true; 62 } 63 64 if (perf_data__is_pipe(data)) 65 return 0; 66 67 if (perf_header__has_feat(&session->header, HEADER_STAT)) 68 return 0; 69 70 if (!evlist__valid_sample_type(session->evlist)) { 71 pr_err("non matching sample_type\n"); 72 return -1; 73 } 74 75 if (!evlist__valid_sample_id_all(session->evlist)) { 76 pr_err("non matching sample_id_all\n"); 77 return -1; 78 } 79 80 if (!evlist__valid_read_format(session->evlist)) { 81 pr_err("non matching read_format\n"); 82 return -1; 83 } 84 85 return 0; 86 } 87 88 void perf_session__set_id_hdr_size(struct perf_session *session) 89 { 90 u16 id_hdr_size = evlist__id_hdr_size(session->evlist); 91 92 machines__set_id_hdr_size(&session->machines, id_hdr_size); 93 } 94 95 int perf_session__create_kernel_maps(struct perf_session *session) 96 { 97 int ret = machine__create_kernel_maps(&session->machines.host); 98 99 if (ret >= 0) 100 ret = machines__create_guest_kernel_maps(&session->machines); 101 return ret; 102 } 103 104 static void perf_session__destroy_kernel_maps(struct perf_session *session) 105 { 106 machines__destroy_kernel_maps(&session->machines); 107 } 108 109 static bool perf_session__has_comm_exec(struct perf_session *session) 110 { 111 struct evsel *evsel; 112 113 evlist__for_each_entry(session->evlist, evsel) { 114 if (evsel->core.attr.comm_exec) 115 return true; 116 } 117 118 return false; 119 } 120 121 static void perf_session__set_comm_exec(struct perf_session *session) 122 { 123 bool comm_exec = perf_session__has_comm_exec(session); 124 125 machines__set_comm_exec(&session->machines, comm_exec); 126 } 127 128 static int ordered_events__deliver_event(struct ordered_events *oe, 129 struct ordered_event *event) 130 { 131 struct perf_session *session = container_of(oe, struct perf_session, 132 ordered_events); 133 134 return perf_session__deliver_event(session, event->event, 135 session->tool, event->file_offset, 136 event->file_path); 137 } 138 139 struct perf_session *__perf_session__new(struct perf_data *data, 140 struct perf_tool *tool, 141 bool trace_event_repipe) 142 { 143 int ret = -ENOMEM; 144 struct perf_session *session = zalloc(sizeof(*session)); 145 146 if (!session) 147 goto out; 148 149 session->trace_event_repipe = trace_event_repipe; 150 session->tool = tool; 151 session->decomp_data.zstd_decomp = &session->zstd_data; 152 session->active_decomp = &session->decomp_data; 153 INIT_LIST_HEAD(&session->auxtrace_index); 154 machines__init(&session->machines); 155 ordered_events__init(&session->ordered_events, 156 ordered_events__deliver_event, NULL); 157 158 perf_env__init(&session->header.env); 159 if (data) { 160 ret = perf_data__open(data); 161 if (ret < 0) 162 goto out_delete; 163 164 session->data = data; 165 166 if (perf_data__is_read(data)) { 167 ret = perf_session__open(session); 168 if (ret < 0) 169 goto out_delete; 170 171 /* 172 * set session attributes that are present in perf.data 173 * but not in pipe-mode. 174 */ 175 if (!data->is_pipe) { 176 perf_session__set_id_hdr_size(session); 177 perf_session__set_comm_exec(session); 178 } 179 180 evlist__init_trace_event_sample_raw(session->evlist); 181 182 /* Open the directory data. */ 183 if (data->is_dir) { 184 ret = perf_data__open_dir(data); 185 if (ret) 186 goto out_delete; 187 } 188 189 if (!symbol_conf.kallsyms_name && 190 !symbol_conf.vmlinux_name) 191 symbol_conf.kallsyms_name = perf_data__kallsyms_name(data); 192 } 193 } else { 194 session->machines.host.env = &perf_env; 195 } 196 197 session->machines.host.single_address_space = 198 perf_env__single_address_space(session->machines.host.env); 199 200 if (!data || perf_data__is_write(data)) { 201 /* 202 * In O_RDONLY mode this will be performed when reading the 203 * kernel MMAP event, in perf_event__process_mmap(). 204 */ 205 if (perf_session__create_kernel_maps(session) < 0) 206 pr_warning("Cannot read kernel map\n"); 207 } 208 209 /* 210 * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is 211 * processed, so evlist__sample_id_all is not meaningful here. 212 */ 213 if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps && 214 tool->ordered_events && !evlist__sample_id_all(session->evlist)) { 215 dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); 216 tool->ordered_events = false; 217 } 218 219 return session; 220 221 out_delete: 222 perf_session__delete(session); 223 out: 224 return ERR_PTR(ret); 225 } 226 227 static void perf_decomp__release_events(struct decomp *next) 228 { 229 struct decomp *decomp; 230 size_t mmap_len; 231 232 do { 233 decomp = next; 234 if (decomp == NULL) 235 break; 236 next = decomp->next; 237 mmap_len = decomp->mmap_len; 238 munmap(decomp, mmap_len); 239 } while (1); 240 } 241 242 void perf_session__delete(struct perf_session *session) 243 { 244 if (session == NULL) 245 return; 246 auxtrace__free(session); 247 auxtrace_index__free(&session->auxtrace_index); 248 debuginfo_cache__delete(); 249 perf_session__destroy_kernel_maps(session); 250 perf_decomp__release_events(session->decomp_data.decomp); 251 perf_env__exit(&session->header.env); 252 machines__exit(&session->machines); 253 if (session->data) { 254 if (perf_data__is_read(session->data)) 255 evlist__delete(session->evlist); 256 perf_data__close(session->data); 257 } 258 #ifdef HAVE_LIBTRACEEVENT 259 trace_event__cleanup(&session->tevent); 260 #endif 261 free(session); 262 } 263 264 static void swap_sample_id_all(union perf_event *event, void *data) 265 { 266 void *end = (void *) event + event->header.size; 267 int size = end - data; 268 269 BUG_ON(size % sizeof(u64)); 270 mem_bswap_64(data, size); 271 } 272 273 static void perf_event__all64_swap(union perf_event *event, 274 bool sample_id_all __maybe_unused) 275 { 276 struct perf_event_header *hdr = &event->header; 277 mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr)); 278 } 279 280 static void perf_event__comm_swap(union perf_event *event, bool sample_id_all) 281 { 282 event->comm.pid = bswap_32(event->comm.pid); 283 event->comm.tid = bswap_32(event->comm.tid); 284 285 if (sample_id_all) { 286 void *data = &event->comm.comm; 287 288 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 289 swap_sample_id_all(event, data); 290 } 291 } 292 293 static void perf_event__mmap_swap(union perf_event *event, 294 bool sample_id_all) 295 { 296 event->mmap.pid = bswap_32(event->mmap.pid); 297 event->mmap.tid = bswap_32(event->mmap.tid); 298 event->mmap.start = bswap_64(event->mmap.start); 299 event->mmap.len = bswap_64(event->mmap.len); 300 event->mmap.pgoff = bswap_64(event->mmap.pgoff); 301 302 if (sample_id_all) { 303 void *data = &event->mmap.filename; 304 305 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 306 swap_sample_id_all(event, data); 307 } 308 } 309 310 static void perf_event__mmap2_swap(union perf_event *event, 311 bool sample_id_all) 312 { 313 event->mmap2.pid = bswap_32(event->mmap2.pid); 314 event->mmap2.tid = bswap_32(event->mmap2.tid); 315 event->mmap2.start = bswap_64(event->mmap2.start); 316 event->mmap2.len = bswap_64(event->mmap2.len); 317 event->mmap2.pgoff = bswap_64(event->mmap2.pgoff); 318 319 if (!(event->header.misc & PERF_RECORD_MISC_MMAP_BUILD_ID)) { 320 event->mmap2.maj = bswap_32(event->mmap2.maj); 321 event->mmap2.min = bswap_32(event->mmap2.min); 322 event->mmap2.ino = bswap_64(event->mmap2.ino); 323 event->mmap2.ino_generation = bswap_64(event->mmap2.ino_generation); 324 } 325 326 if (sample_id_all) { 327 void *data = &event->mmap2.filename; 328 329 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 330 swap_sample_id_all(event, data); 331 } 332 } 333 static void perf_event__task_swap(union perf_event *event, bool sample_id_all) 334 { 335 event->fork.pid = bswap_32(event->fork.pid); 336 event->fork.tid = bswap_32(event->fork.tid); 337 event->fork.ppid = bswap_32(event->fork.ppid); 338 event->fork.ptid = bswap_32(event->fork.ptid); 339 event->fork.time = bswap_64(event->fork.time); 340 341 if (sample_id_all) 342 swap_sample_id_all(event, &event->fork + 1); 343 } 344 345 static void perf_event__read_swap(union perf_event *event, bool sample_id_all) 346 { 347 event->read.pid = bswap_32(event->read.pid); 348 event->read.tid = bswap_32(event->read.tid); 349 event->read.value = bswap_64(event->read.value); 350 event->read.time_enabled = bswap_64(event->read.time_enabled); 351 event->read.time_running = bswap_64(event->read.time_running); 352 event->read.id = bswap_64(event->read.id); 353 354 if (sample_id_all) 355 swap_sample_id_all(event, &event->read + 1); 356 } 357 358 static void perf_event__aux_swap(union perf_event *event, bool sample_id_all) 359 { 360 event->aux.aux_offset = bswap_64(event->aux.aux_offset); 361 event->aux.aux_size = bswap_64(event->aux.aux_size); 362 event->aux.flags = bswap_64(event->aux.flags); 363 364 if (sample_id_all) 365 swap_sample_id_all(event, &event->aux + 1); 366 } 367 368 static void perf_event__itrace_start_swap(union perf_event *event, 369 bool sample_id_all) 370 { 371 event->itrace_start.pid = bswap_32(event->itrace_start.pid); 372 event->itrace_start.tid = bswap_32(event->itrace_start.tid); 373 374 if (sample_id_all) 375 swap_sample_id_all(event, &event->itrace_start + 1); 376 } 377 378 static void perf_event__switch_swap(union perf_event *event, bool sample_id_all) 379 { 380 if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) { 381 event->context_switch.next_prev_pid = 382 bswap_32(event->context_switch.next_prev_pid); 383 event->context_switch.next_prev_tid = 384 bswap_32(event->context_switch.next_prev_tid); 385 } 386 387 if (sample_id_all) 388 swap_sample_id_all(event, &event->context_switch + 1); 389 } 390 391 static void perf_event__text_poke_swap(union perf_event *event, bool sample_id_all) 392 { 393 event->text_poke.addr = bswap_64(event->text_poke.addr); 394 event->text_poke.old_len = bswap_16(event->text_poke.old_len); 395 event->text_poke.new_len = bswap_16(event->text_poke.new_len); 396 397 if (sample_id_all) { 398 size_t len = sizeof(event->text_poke.old_len) + 399 sizeof(event->text_poke.new_len) + 400 event->text_poke.old_len + 401 event->text_poke.new_len; 402 void *data = &event->text_poke.old_len; 403 404 data += PERF_ALIGN(len, sizeof(u64)); 405 swap_sample_id_all(event, data); 406 } 407 } 408 409 static void perf_event__throttle_swap(union perf_event *event, 410 bool sample_id_all) 411 { 412 event->throttle.time = bswap_64(event->throttle.time); 413 event->throttle.id = bswap_64(event->throttle.id); 414 event->throttle.stream_id = bswap_64(event->throttle.stream_id); 415 416 if (sample_id_all) 417 swap_sample_id_all(event, &event->throttle + 1); 418 } 419 420 static void perf_event__namespaces_swap(union perf_event *event, 421 bool sample_id_all) 422 { 423 u64 i; 424 425 event->namespaces.pid = bswap_32(event->namespaces.pid); 426 event->namespaces.tid = bswap_32(event->namespaces.tid); 427 event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces); 428 429 for (i = 0; i < event->namespaces.nr_namespaces; i++) { 430 struct perf_ns_link_info *ns = &event->namespaces.link_info[i]; 431 432 ns->dev = bswap_64(ns->dev); 433 ns->ino = bswap_64(ns->ino); 434 } 435 436 if (sample_id_all) 437 swap_sample_id_all(event, &event->namespaces.link_info[i]); 438 } 439 440 static void perf_event__cgroup_swap(union perf_event *event, bool sample_id_all) 441 { 442 event->cgroup.id = bswap_64(event->cgroup.id); 443 444 if (sample_id_all) { 445 void *data = &event->cgroup.path; 446 447 data += PERF_ALIGN(strlen(data) + 1, sizeof(u64)); 448 swap_sample_id_all(event, data); 449 } 450 } 451 452 static u8 revbyte(u8 b) 453 { 454 int rev = (b >> 4) | ((b & 0xf) << 4); 455 rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2); 456 rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1); 457 return (u8) rev; 458 } 459 460 /* 461 * XXX this is hack in attempt to carry flags bitfield 462 * through endian village. ABI says: 463 * 464 * Bit-fields are allocated from right to left (least to most significant) 465 * on little-endian implementations and from left to right (most to least 466 * significant) on big-endian implementations. 467 * 468 * The above seems to be byte specific, so we need to reverse each 469 * byte of the bitfield. 'Internet' also says this might be implementation 470 * specific and we probably need proper fix and carry perf_event_attr 471 * bitfield flags in separate data file FEAT_ section. Thought this seems 472 * to work for now. 473 */ 474 static void swap_bitfield(u8 *p, unsigned len) 475 { 476 unsigned i; 477 478 for (i = 0; i < len; i++) { 479 *p = revbyte(*p); 480 p++; 481 } 482 } 483 484 /* exported for swapping attributes in file header */ 485 void perf_event__attr_swap(struct perf_event_attr *attr) 486 { 487 attr->type = bswap_32(attr->type); 488 attr->size = bswap_32(attr->size); 489 490 #define bswap_safe(f, n) \ 491 (attr->size > (offsetof(struct perf_event_attr, f) + \ 492 sizeof(attr->f) * (n))) 493 #define bswap_field(f, sz) \ 494 do { \ 495 if (bswap_safe(f, 0)) \ 496 attr->f = bswap_##sz(attr->f); \ 497 } while(0) 498 #define bswap_field_16(f) bswap_field(f, 16) 499 #define bswap_field_32(f) bswap_field(f, 32) 500 #define bswap_field_64(f) bswap_field(f, 64) 501 502 bswap_field_64(config); 503 bswap_field_64(sample_period); 504 bswap_field_64(sample_type); 505 bswap_field_64(read_format); 506 bswap_field_32(wakeup_events); 507 bswap_field_32(bp_type); 508 bswap_field_64(bp_addr); 509 bswap_field_64(bp_len); 510 bswap_field_64(branch_sample_type); 511 bswap_field_64(sample_regs_user); 512 bswap_field_32(sample_stack_user); 513 bswap_field_32(aux_watermark); 514 bswap_field_16(sample_max_stack); 515 bswap_field_32(aux_sample_size); 516 517 /* 518 * After read_format are bitfields. Check read_format because 519 * we are unable to use offsetof on bitfield. 520 */ 521 if (bswap_safe(read_format, 1)) 522 swap_bitfield((u8 *) (&attr->read_format + 1), 523 sizeof(u64)); 524 #undef bswap_field_64 525 #undef bswap_field_32 526 #undef bswap_field 527 #undef bswap_safe 528 } 529 530 static void perf_event__hdr_attr_swap(union perf_event *event, 531 bool sample_id_all __maybe_unused) 532 { 533 size_t size; 534 535 perf_event__attr_swap(&event->attr.attr); 536 537 size = event->header.size; 538 size -= perf_record_header_attr_id(event) - (void *)event; 539 mem_bswap_64(perf_record_header_attr_id(event), size); 540 } 541 542 static void perf_event__event_update_swap(union perf_event *event, 543 bool sample_id_all __maybe_unused) 544 { 545 event->event_update.type = bswap_64(event->event_update.type); 546 event->event_update.id = bswap_64(event->event_update.id); 547 } 548 549 static void perf_event__event_type_swap(union perf_event *event, 550 bool sample_id_all __maybe_unused) 551 { 552 event->event_type.event_type.event_id = 553 bswap_64(event->event_type.event_type.event_id); 554 } 555 556 static void perf_event__tracing_data_swap(union perf_event *event, 557 bool sample_id_all __maybe_unused) 558 { 559 event->tracing_data.size = bswap_32(event->tracing_data.size); 560 } 561 562 static void perf_event__auxtrace_info_swap(union perf_event *event, 563 bool sample_id_all __maybe_unused) 564 { 565 size_t size; 566 567 event->auxtrace_info.type = bswap_32(event->auxtrace_info.type); 568 569 size = event->header.size; 570 size -= (void *)&event->auxtrace_info.priv - (void *)event; 571 mem_bswap_64(event->auxtrace_info.priv, size); 572 } 573 574 static void perf_event__auxtrace_swap(union perf_event *event, 575 bool sample_id_all __maybe_unused) 576 { 577 event->auxtrace.size = bswap_64(event->auxtrace.size); 578 event->auxtrace.offset = bswap_64(event->auxtrace.offset); 579 event->auxtrace.reference = bswap_64(event->auxtrace.reference); 580 event->auxtrace.idx = bswap_32(event->auxtrace.idx); 581 event->auxtrace.tid = bswap_32(event->auxtrace.tid); 582 event->auxtrace.cpu = bswap_32(event->auxtrace.cpu); 583 } 584 585 static void perf_event__auxtrace_error_swap(union perf_event *event, 586 bool sample_id_all __maybe_unused) 587 { 588 event->auxtrace_error.type = bswap_32(event->auxtrace_error.type); 589 event->auxtrace_error.code = bswap_32(event->auxtrace_error.code); 590 event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu); 591 event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid); 592 event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid); 593 event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt); 594 event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip); 595 if (event->auxtrace_error.fmt) 596 event->auxtrace_error.time = bswap_64(event->auxtrace_error.time); 597 if (event->auxtrace_error.fmt >= 2) { 598 event->auxtrace_error.machine_pid = bswap_32(event->auxtrace_error.machine_pid); 599 event->auxtrace_error.vcpu = bswap_32(event->auxtrace_error.vcpu); 600 } 601 } 602 603 static void perf_event__thread_map_swap(union perf_event *event, 604 bool sample_id_all __maybe_unused) 605 { 606 unsigned i; 607 608 event->thread_map.nr = bswap_64(event->thread_map.nr); 609 610 for (i = 0; i < event->thread_map.nr; i++) 611 event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid); 612 } 613 614 static void perf_event__cpu_map_swap(union perf_event *event, 615 bool sample_id_all __maybe_unused) 616 { 617 struct perf_record_cpu_map_data *data = &event->cpu_map.data; 618 619 data->type = bswap_16(data->type); 620 621 switch (data->type) { 622 case PERF_CPU_MAP__CPUS: 623 data->cpus_data.nr = bswap_16(data->cpus_data.nr); 624 625 for (unsigned i = 0; i < data->cpus_data.nr; i++) 626 data->cpus_data.cpu[i] = bswap_16(data->cpus_data.cpu[i]); 627 break; 628 case PERF_CPU_MAP__MASK: 629 data->mask32_data.long_size = bswap_16(data->mask32_data.long_size); 630 631 switch (data->mask32_data.long_size) { 632 case 4: 633 data->mask32_data.nr = bswap_16(data->mask32_data.nr); 634 for (unsigned i = 0; i < data->mask32_data.nr; i++) 635 data->mask32_data.mask[i] = bswap_32(data->mask32_data.mask[i]); 636 break; 637 case 8: 638 data->mask64_data.nr = bswap_16(data->mask64_data.nr); 639 for (unsigned i = 0; i < data->mask64_data.nr; i++) 640 data->mask64_data.mask[i] = bswap_64(data->mask64_data.mask[i]); 641 break; 642 default: 643 pr_err("cpu_map swap: unsupported long size\n"); 644 } 645 break; 646 case PERF_CPU_MAP__RANGE_CPUS: 647 data->range_cpu_data.start_cpu = bswap_16(data->range_cpu_data.start_cpu); 648 data->range_cpu_data.end_cpu = bswap_16(data->range_cpu_data.end_cpu); 649 break; 650 default: 651 break; 652 } 653 } 654 655 static void perf_event__stat_config_swap(union perf_event *event, 656 bool sample_id_all __maybe_unused) 657 { 658 u64 size; 659 660 size = bswap_64(event->stat_config.nr) * sizeof(event->stat_config.data[0]); 661 size += 1; /* nr item itself */ 662 mem_bswap_64(&event->stat_config.nr, size); 663 } 664 665 static void perf_event__stat_swap(union perf_event *event, 666 bool sample_id_all __maybe_unused) 667 { 668 event->stat.id = bswap_64(event->stat.id); 669 event->stat.thread = bswap_32(event->stat.thread); 670 event->stat.cpu = bswap_32(event->stat.cpu); 671 event->stat.val = bswap_64(event->stat.val); 672 event->stat.ena = bswap_64(event->stat.ena); 673 event->stat.run = bswap_64(event->stat.run); 674 } 675 676 static void perf_event__stat_round_swap(union perf_event *event, 677 bool sample_id_all __maybe_unused) 678 { 679 event->stat_round.type = bswap_64(event->stat_round.type); 680 event->stat_round.time = bswap_64(event->stat_round.time); 681 } 682 683 static void perf_event__time_conv_swap(union perf_event *event, 684 bool sample_id_all __maybe_unused) 685 { 686 event->time_conv.time_shift = bswap_64(event->time_conv.time_shift); 687 event->time_conv.time_mult = bswap_64(event->time_conv.time_mult); 688 event->time_conv.time_zero = bswap_64(event->time_conv.time_zero); 689 690 if (event_contains(event->time_conv, time_cycles)) { 691 event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles); 692 event->time_conv.time_mask = bswap_64(event->time_conv.time_mask); 693 } 694 } 695 696 typedef void (*perf_event__swap_op)(union perf_event *event, 697 bool sample_id_all); 698 699 static perf_event__swap_op perf_event__swap_ops[] = { 700 [PERF_RECORD_MMAP] = perf_event__mmap_swap, 701 [PERF_RECORD_MMAP2] = perf_event__mmap2_swap, 702 [PERF_RECORD_COMM] = perf_event__comm_swap, 703 [PERF_RECORD_FORK] = perf_event__task_swap, 704 [PERF_RECORD_EXIT] = perf_event__task_swap, 705 [PERF_RECORD_LOST] = perf_event__all64_swap, 706 [PERF_RECORD_READ] = perf_event__read_swap, 707 [PERF_RECORD_THROTTLE] = perf_event__throttle_swap, 708 [PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap, 709 [PERF_RECORD_SAMPLE] = perf_event__all64_swap, 710 [PERF_RECORD_AUX] = perf_event__aux_swap, 711 [PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap, 712 [PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap, 713 [PERF_RECORD_SWITCH] = perf_event__switch_swap, 714 [PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap, 715 [PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap, 716 [PERF_RECORD_CGROUP] = perf_event__cgroup_swap, 717 [PERF_RECORD_TEXT_POKE] = perf_event__text_poke_swap, 718 [PERF_RECORD_AUX_OUTPUT_HW_ID] = perf_event__all64_swap, 719 [PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap, 720 [PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap, 721 [PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap, 722 [PERF_RECORD_HEADER_BUILD_ID] = NULL, 723 [PERF_RECORD_ID_INDEX] = perf_event__all64_swap, 724 [PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap, 725 [PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap, 726 [PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap, 727 [PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap, 728 [PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap, 729 [PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap, 730 [PERF_RECORD_STAT] = perf_event__stat_swap, 731 [PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap, 732 [PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap, 733 [PERF_RECORD_TIME_CONV] = perf_event__time_conv_swap, 734 [PERF_RECORD_HEADER_MAX] = NULL, 735 }; 736 737 /* 738 * When perf record finishes a pass on every buffers, it records this pseudo 739 * event. 740 * We record the max timestamp t found in the pass n. 741 * Assuming these timestamps are monotonic across cpus, we know that if 742 * a buffer still has events with timestamps below t, they will be all 743 * available and then read in the pass n + 1. 744 * Hence when we start to read the pass n + 2, we can safely flush every 745 * events with timestamps below t. 746 * 747 * ============ PASS n ================= 748 * CPU 0 | CPU 1 749 * | 750 * cnt1 timestamps | cnt2 timestamps 751 * 1 | 2 752 * 2 | 3 753 * - | 4 <--- max recorded 754 * 755 * ============ PASS n + 1 ============== 756 * CPU 0 | CPU 1 757 * | 758 * cnt1 timestamps | cnt2 timestamps 759 * 3 | 5 760 * 4 | 6 761 * 5 | 7 <---- max recorded 762 * 763 * Flush every events below timestamp 4 764 * 765 * ============ PASS n + 2 ============== 766 * CPU 0 | CPU 1 767 * | 768 * cnt1 timestamps | cnt2 timestamps 769 * 6 | 8 770 * 7 | 9 771 * - | 10 772 * 773 * Flush every events below timestamp 7 774 * etc... 775 */ 776 int perf_event__process_finished_round(const struct perf_tool *tool __maybe_unused, 777 union perf_event *event __maybe_unused, 778 struct ordered_events *oe) 779 { 780 if (dump_trace) 781 fprintf(stdout, "\n"); 782 return ordered_events__flush(oe, OE_FLUSH__ROUND); 783 } 784 785 int perf_session__queue_event(struct perf_session *s, union perf_event *event, 786 u64 timestamp, u64 file_offset, const char *file_path) 787 { 788 return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset, file_path); 789 } 790 791 static void callchain__lbr_callstack_printf(struct perf_sample *sample) 792 { 793 struct ip_callchain *callchain = sample->callchain; 794 struct branch_stack *lbr_stack = sample->branch_stack; 795 struct branch_entry *entries = perf_sample__branch_entries(sample); 796 u64 kernel_callchain_nr = callchain->nr; 797 unsigned int i; 798 799 for (i = 0; i < kernel_callchain_nr; i++) { 800 if (callchain->ips[i] == PERF_CONTEXT_USER) 801 break; 802 } 803 804 if ((i != kernel_callchain_nr) && lbr_stack->nr) { 805 u64 total_nr; 806 /* 807 * LBR callstack can only get user call chain, 808 * i is kernel call chain number, 809 * 1 is PERF_CONTEXT_USER. 810 * 811 * The user call chain is stored in LBR registers. 812 * LBR are pair registers. The caller is stored 813 * in "from" register, while the callee is stored 814 * in "to" register. 815 * For example, there is a call stack 816 * "A"->"B"->"C"->"D". 817 * The LBR registers will be recorded like 818 * "C"->"D", "B"->"C", "A"->"B". 819 * So only the first "to" register and all "from" 820 * registers are needed to construct the whole stack. 821 */ 822 total_nr = i + 1 + lbr_stack->nr + 1; 823 kernel_callchain_nr = i + 1; 824 825 printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr); 826 827 for (i = 0; i < kernel_callchain_nr; i++) 828 printf("..... %2d: %016" PRIx64 "\n", 829 i, callchain->ips[i]); 830 831 printf("..... %2d: %016" PRIx64 "\n", 832 (int)(kernel_callchain_nr), entries[0].to); 833 for (i = 0; i < lbr_stack->nr; i++) 834 printf("..... %2d: %016" PRIx64 "\n", 835 (int)(i + kernel_callchain_nr + 1), entries[i].from); 836 } 837 } 838 839 static void callchain__printf(struct evsel *evsel, 840 struct perf_sample *sample) 841 { 842 unsigned int i; 843 struct ip_callchain *callchain = sample->callchain; 844 845 if (evsel__has_branch_callstack(evsel)) 846 callchain__lbr_callstack_printf(sample); 847 848 printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr); 849 850 for (i = 0; i < callchain->nr; i++) 851 printf("..... %2d: %016" PRIx64 "\n", 852 i, callchain->ips[i]); 853 } 854 855 static void branch_stack__printf(struct perf_sample *sample, 856 struct evsel *evsel) 857 { 858 struct branch_entry *entries = perf_sample__branch_entries(sample); 859 bool callstack = evsel__has_branch_callstack(evsel); 860 u64 *branch_stack_cntr = sample->branch_stack_cntr; 861 uint64_t i; 862 863 if (!callstack) { 864 printf("%s: nr:%" PRIu64 "\n", "... branch stack", sample->branch_stack->nr); 865 } else { 866 /* the reason of adding 1 to nr is because after expanding 867 * branch stack it generates nr + 1 callstack records. e.g., 868 * B()->C() 869 * A()->B() 870 * the final callstack should be: 871 * C() 872 * B() 873 * A() 874 */ 875 printf("%s: nr:%" PRIu64 "\n", "... branch callstack", sample->branch_stack->nr+1); 876 } 877 878 for (i = 0; i < sample->branch_stack->nr; i++) { 879 struct branch_entry *e = &entries[i]; 880 881 if (!callstack) { 882 printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x %s %s\n", 883 i, e->from, e->to, 884 (unsigned short)e->flags.cycles, 885 e->flags.mispred ? "M" : " ", 886 e->flags.predicted ? "P" : " ", 887 e->flags.abort ? "A" : " ", 888 e->flags.in_tx ? "T" : " ", 889 (unsigned)e->flags.reserved, 890 get_branch_type(e), 891 e->flags.spec ? branch_spec_desc(e->flags.spec) : ""); 892 } else { 893 if (i == 0) { 894 printf("..... %2"PRIu64": %016" PRIx64 "\n" 895 "..... %2"PRIu64": %016" PRIx64 "\n", 896 i, e->to, i+1, e->from); 897 } else { 898 printf("..... %2"PRIu64": %016" PRIx64 "\n", i+1, e->from); 899 } 900 } 901 } 902 903 if (branch_stack_cntr) { 904 unsigned int br_cntr_width, br_cntr_nr; 905 906 perf_env__find_br_cntr_info(evsel__env(evsel), &br_cntr_nr, &br_cntr_width); 907 printf("... branch stack counters: nr:%" PRIu64 " (counter width: %u max counter nr:%u)\n", 908 sample->branch_stack->nr, br_cntr_width, br_cntr_nr); 909 for (i = 0; i < sample->branch_stack->nr; i++) 910 printf("..... %2"PRIu64": %016" PRIx64 "\n", i, branch_stack_cntr[i]); 911 } 912 } 913 914 static void regs_dump__printf(u64 mask, u64 *regs, const char *arch) 915 { 916 unsigned rid, i = 0; 917 918 for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) { 919 u64 val = regs[i++]; 920 921 printf(".... %-5s 0x%016" PRIx64 "\n", 922 perf_reg_name(rid, arch), val); 923 } 924 } 925 926 static const char *regs_abi[] = { 927 [PERF_SAMPLE_REGS_ABI_NONE] = "none", 928 [PERF_SAMPLE_REGS_ABI_32] = "32-bit", 929 [PERF_SAMPLE_REGS_ABI_64] = "64-bit", 930 }; 931 932 static inline const char *regs_dump_abi(struct regs_dump *d) 933 { 934 if (d->abi > PERF_SAMPLE_REGS_ABI_64) 935 return "unknown"; 936 937 return regs_abi[d->abi]; 938 } 939 940 static void regs__printf(const char *type, struct regs_dump *regs, const char *arch) 941 { 942 u64 mask = regs->mask; 943 944 printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n", 945 type, 946 mask, 947 regs_dump_abi(regs)); 948 949 regs_dump__printf(mask, regs->regs, arch); 950 } 951 952 static void regs_user__printf(struct perf_sample *sample, const char *arch) 953 { 954 struct regs_dump *user_regs; 955 956 if (!sample->user_regs) 957 return; 958 959 user_regs = perf_sample__user_regs(sample); 960 961 if (user_regs->regs) 962 regs__printf("user", user_regs, arch); 963 } 964 965 static void regs_intr__printf(struct perf_sample *sample, const char *arch) 966 { 967 struct regs_dump *intr_regs; 968 969 if (!sample->intr_regs) 970 return; 971 972 intr_regs = perf_sample__intr_regs(sample); 973 974 if (intr_regs->regs) 975 regs__printf("intr", intr_regs, arch); 976 } 977 978 static void stack_user__printf(struct stack_dump *dump) 979 { 980 printf("... ustack: size %" PRIu64 ", offset 0x%x\n", 981 dump->size, dump->offset); 982 } 983 984 static void evlist__print_tstamp(struct evlist *evlist, union perf_event *event, struct perf_sample *sample) 985 { 986 u64 sample_type = __evlist__combined_sample_type(evlist); 987 988 if (event->header.type != PERF_RECORD_SAMPLE && 989 !evlist__sample_id_all(evlist)) { 990 fputs("-1 -1 ", stdout); 991 return; 992 } 993 994 if ((sample_type & PERF_SAMPLE_CPU)) 995 printf("%u ", sample->cpu); 996 997 if (sample_type & PERF_SAMPLE_TIME) 998 printf("%" PRIu64 " ", sample->time); 999 } 1000 1001 static void sample_read__printf(struct perf_sample *sample, u64 read_format) 1002 { 1003 printf("... sample_read:\n"); 1004 1005 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1006 printf("...... time enabled %016" PRIx64 "\n", 1007 sample->read.time_enabled); 1008 1009 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1010 printf("...... time running %016" PRIx64 "\n", 1011 sample->read.time_running); 1012 1013 if (read_format & PERF_FORMAT_GROUP) { 1014 struct sample_read_value *value = sample->read.group.values; 1015 1016 printf(".... group nr %" PRIu64 "\n", sample->read.group.nr); 1017 1018 sample_read_group__for_each(value, sample->read.group.nr, read_format) { 1019 printf("..... id %016" PRIx64 1020 ", value %016" PRIx64, 1021 value->id, value->value); 1022 if (read_format & PERF_FORMAT_LOST) 1023 printf(", lost %" PRIu64, value->lost); 1024 printf("\n"); 1025 } 1026 } else { 1027 printf("..... id %016" PRIx64 ", value %016" PRIx64, 1028 sample->read.one.id, sample->read.one.value); 1029 if (read_format & PERF_FORMAT_LOST) 1030 printf(", lost %" PRIu64, sample->read.one.lost); 1031 printf("\n"); 1032 } 1033 } 1034 1035 static void dump_event(struct evlist *evlist, union perf_event *event, 1036 u64 file_offset, struct perf_sample *sample, 1037 const char *file_path) 1038 { 1039 if (!dump_trace) 1040 return; 1041 1042 printf("\n%#" PRIx64 "@%s [%#x]: event: %d\n", 1043 file_offset, file_path, event->header.size, event->header.type); 1044 1045 trace_event(event); 1046 if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw) 1047 evlist->trace_event_sample_raw(evlist, event, sample); 1048 1049 if (sample) 1050 evlist__print_tstamp(evlist, event, sample); 1051 1052 printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset, 1053 event->header.size, perf_event__name(event->header.type)); 1054 } 1055 1056 char *get_page_size_name(u64 size, char *str) 1057 { 1058 if (!size || !unit_number__scnprintf(str, PAGE_SIZE_NAME_LEN, size)) 1059 snprintf(str, PAGE_SIZE_NAME_LEN, "%s", "N/A"); 1060 1061 return str; 1062 } 1063 1064 static void dump_sample(struct evsel *evsel, union perf_event *event, 1065 struct perf_sample *sample, const char *arch) 1066 { 1067 u64 sample_type; 1068 char str[PAGE_SIZE_NAME_LEN]; 1069 1070 if (!dump_trace) 1071 return; 1072 1073 printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n", 1074 event->header.misc, sample->pid, sample->tid, sample->ip, 1075 sample->period, sample->addr); 1076 1077 sample_type = evsel->core.attr.sample_type; 1078 1079 if (evsel__has_callchain(evsel)) 1080 callchain__printf(evsel, sample); 1081 1082 if (evsel__has_br_stack(evsel)) 1083 branch_stack__printf(sample, evsel); 1084 1085 if (sample_type & PERF_SAMPLE_REGS_USER) 1086 regs_user__printf(sample, arch); 1087 1088 if (sample_type & PERF_SAMPLE_REGS_INTR) 1089 regs_intr__printf(sample, arch); 1090 1091 if (sample_type & PERF_SAMPLE_STACK_USER) 1092 stack_user__printf(&sample->user_stack); 1093 1094 if (sample_type & PERF_SAMPLE_WEIGHT_TYPE) { 1095 printf("... weight: %" PRIu64 "", sample->weight); 1096 if (sample_type & PERF_SAMPLE_WEIGHT_STRUCT) { 1097 printf(",0x%"PRIx16"", sample->ins_lat); 1098 printf(",0x%"PRIx16"", sample->p_stage_cyc); 1099 } 1100 printf("\n"); 1101 } 1102 1103 if (sample_type & PERF_SAMPLE_DATA_SRC) 1104 printf(" . data_src: 0x%"PRIx64"\n", sample->data_src); 1105 1106 if (sample_type & PERF_SAMPLE_PHYS_ADDR) 1107 printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr); 1108 1109 if (sample_type & PERF_SAMPLE_DATA_PAGE_SIZE) 1110 printf(" .. data page size: %s\n", get_page_size_name(sample->data_page_size, str)); 1111 1112 if (sample_type & PERF_SAMPLE_CODE_PAGE_SIZE) 1113 printf(" .. code page size: %s\n", get_page_size_name(sample->code_page_size, str)); 1114 1115 if (sample_type & PERF_SAMPLE_TRANSACTION) 1116 printf("... transaction: %" PRIx64 "\n", sample->transaction); 1117 1118 if (sample_type & PERF_SAMPLE_READ) 1119 sample_read__printf(sample, evsel->core.attr.read_format); 1120 } 1121 1122 static void dump_read(struct evsel *evsel, union perf_event *event) 1123 { 1124 struct perf_record_read *read_event = &event->read; 1125 u64 read_format; 1126 1127 if (!dump_trace) 1128 return; 1129 1130 printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid, 1131 evsel__name(evsel), event->read.value); 1132 1133 if (!evsel) 1134 return; 1135 1136 read_format = evsel->core.attr.read_format; 1137 1138 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1139 printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled); 1140 1141 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1142 printf("... time running : %" PRI_lu64 "\n", read_event->time_running); 1143 1144 if (read_format & PERF_FORMAT_ID) 1145 printf("... id : %" PRI_lu64 "\n", read_event->id); 1146 1147 if (read_format & PERF_FORMAT_LOST) 1148 printf("... lost : %" PRI_lu64 "\n", read_event->lost); 1149 } 1150 1151 static struct machine *machines__find_for_cpumode(struct machines *machines, 1152 union perf_event *event, 1153 struct perf_sample *sample) 1154 { 1155 if (perf_guest && 1156 ((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) || 1157 (sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) { 1158 u32 pid; 1159 1160 if (sample->machine_pid) 1161 pid = sample->machine_pid; 1162 else if (event->header.type == PERF_RECORD_MMAP 1163 || event->header.type == PERF_RECORD_MMAP2) 1164 pid = event->mmap.pid; 1165 else 1166 pid = sample->pid; 1167 1168 /* 1169 * Guest code machine is created as needed and does not use 1170 * DEFAULT_GUEST_KERNEL_ID. 1171 */ 1172 if (symbol_conf.guest_code) 1173 return machines__findnew(machines, pid); 1174 1175 return machines__find_guest(machines, pid); 1176 } 1177 1178 return &machines->host; 1179 } 1180 1181 static int deliver_sample_value(struct evlist *evlist, 1182 const struct perf_tool *tool, 1183 union perf_event *event, 1184 struct perf_sample *sample, 1185 struct sample_read_value *v, 1186 struct machine *machine, 1187 bool per_thread) 1188 { 1189 struct perf_sample_id *sid = evlist__id2sid(evlist, v->id); 1190 struct evsel *evsel; 1191 u64 *storage = NULL; 1192 1193 if (sid) { 1194 storage = perf_sample_id__get_period_storage(sid, sample->tid, per_thread); 1195 } 1196 1197 if (storage) { 1198 sample->id = v->id; 1199 sample->period = v->value - *storage; 1200 *storage = v->value; 1201 } 1202 1203 if (!storage || sid->evsel == NULL) { 1204 ++evlist->stats.nr_unknown_id; 1205 return 0; 1206 } 1207 1208 /* 1209 * There's no reason to deliver sample 1210 * for zero period, bail out. 1211 */ 1212 if (!sample->period) 1213 return 0; 1214 1215 evsel = container_of(sid->evsel, struct evsel, core); 1216 return tool->sample(tool, event, sample, evsel, machine); 1217 } 1218 1219 static int deliver_sample_group(struct evlist *evlist, 1220 const struct perf_tool *tool, 1221 union perf_event *event, 1222 struct perf_sample *sample, 1223 struct machine *machine, 1224 u64 read_format, 1225 bool per_thread) 1226 { 1227 int ret = -EINVAL; 1228 struct sample_read_value *v = sample->read.group.values; 1229 1230 if (tool->dont_split_sample_group) 1231 return deliver_sample_value(evlist, tool, event, sample, v, machine, 1232 per_thread); 1233 1234 sample_read_group__for_each(v, sample->read.group.nr, read_format) { 1235 ret = deliver_sample_value(evlist, tool, event, sample, v, 1236 machine, per_thread); 1237 if (ret) 1238 break; 1239 } 1240 1241 return ret; 1242 } 1243 1244 static int evlist__deliver_sample(struct evlist *evlist, const struct perf_tool *tool, 1245 union perf_event *event, struct perf_sample *sample, 1246 struct evsel *evsel, struct machine *machine) 1247 { 1248 /* We know evsel != NULL. */ 1249 u64 sample_type = evsel->core.attr.sample_type; 1250 u64 read_format = evsel->core.attr.read_format; 1251 bool per_thread = perf_evsel__attr_has_per_thread_sample_period(&evsel->core); 1252 1253 /* Standard sample delivery. */ 1254 if (!(sample_type & PERF_SAMPLE_READ)) 1255 return tool->sample(tool, event, sample, evsel, machine); 1256 1257 /* For PERF_SAMPLE_READ we have either single or group mode. */ 1258 if (read_format & PERF_FORMAT_GROUP) 1259 return deliver_sample_group(evlist, tool, event, sample, 1260 machine, read_format, per_thread); 1261 else 1262 return deliver_sample_value(evlist, tool, event, sample, 1263 &sample->read.one, machine, 1264 per_thread); 1265 } 1266 1267 static int machines__deliver_event(struct machines *machines, 1268 struct evlist *evlist, 1269 union perf_event *event, 1270 struct perf_sample *sample, 1271 const struct perf_tool *tool, u64 file_offset, 1272 const char *file_path) 1273 { 1274 struct evsel *evsel; 1275 struct machine *machine; 1276 1277 dump_event(evlist, event, file_offset, sample, file_path); 1278 1279 evsel = evlist__id2evsel(evlist, sample->id); 1280 1281 machine = machines__find_for_cpumode(machines, event, sample); 1282 1283 switch (event->header.type) { 1284 case PERF_RECORD_SAMPLE: 1285 if (evsel == NULL) { 1286 ++evlist->stats.nr_unknown_id; 1287 return 0; 1288 } 1289 if (machine == NULL) { 1290 ++evlist->stats.nr_unprocessable_samples; 1291 dump_sample(evsel, event, sample, perf_env__arch(NULL)); 1292 return 0; 1293 } 1294 dump_sample(evsel, event, sample, perf_env__arch(machine->env)); 1295 return evlist__deliver_sample(evlist, tool, event, sample, evsel, machine); 1296 case PERF_RECORD_MMAP: 1297 return tool->mmap(tool, event, sample, machine); 1298 case PERF_RECORD_MMAP2: 1299 if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT) 1300 ++evlist->stats.nr_proc_map_timeout; 1301 return tool->mmap2(tool, event, sample, machine); 1302 case PERF_RECORD_COMM: 1303 return tool->comm(tool, event, sample, machine); 1304 case PERF_RECORD_NAMESPACES: 1305 return tool->namespaces(tool, event, sample, machine); 1306 case PERF_RECORD_CGROUP: 1307 return tool->cgroup(tool, event, sample, machine); 1308 case PERF_RECORD_FORK: 1309 return tool->fork(tool, event, sample, machine); 1310 case PERF_RECORD_EXIT: 1311 return tool->exit(tool, event, sample, machine); 1312 case PERF_RECORD_LOST: 1313 if (tool->lost == perf_event__process_lost) 1314 evlist->stats.total_lost += event->lost.lost; 1315 return tool->lost(tool, event, sample, machine); 1316 case PERF_RECORD_LOST_SAMPLES: 1317 if (event->header.misc & PERF_RECORD_MISC_LOST_SAMPLES_BPF) 1318 evlist->stats.total_dropped_samples += event->lost_samples.lost; 1319 else if (tool->lost_samples == perf_event__process_lost_samples) 1320 evlist->stats.total_lost_samples += event->lost_samples.lost; 1321 return tool->lost_samples(tool, event, sample, machine); 1322 case PERF_RECORD_READ: 1323 dump_read(evsel, event); 1324 return tool->read(tool, event, sample, evsel, machine); 1325 case PERF_RECORD_THROTTLE: 1326 return tool->throttle(tool, event, sample, machine); 1327 case PERF_RECORD_UNTHROTTLE: 1328 return tool->unthrottle(tool, event, sample, machine); 1329 case PERF_RECORD_AUX: 1330 if (tool->aux == perf_event__process_aux) { 1331 if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED) 1332 evlist->stats.total_aux_lost += 1; 1333 if (event->aux.flags & PERF_AUX_FLAG_PARTIAL) 1334 evlist->stats.total_aux_partial += 1; 1335 if (event->aux.flags & PERF_AUX_FLAG_COLLISION) 1336 evlist->stats.total_aux_collision += 1; 1337 } 1338 return tool->aux(tool, event, sample, machine); 1339 case PERF_RECORD_ITRACE_START: 1340 return tool->itrace_start(tool, event, sample, machine); 1341 case PERF_RECORD_SWITCH: 1342 case PERF_RECORD_SWITCH_CPU_WIDE: 1343 return tool->context_switch(tool, event, sample, machine); 1344 case PERF_RECORD_KSYMBOL: 1345 return tool->ksymbol(tool, event, sample, machine); 1346 case PERF_RECORD_BPF_EVENT: 1347 return tool->bpf(tool, event, sample, machine); 1348 case PERF_RECORD_TEXT_POKE: 1349 return tool->text_poke(tool, event, sample, machine); 1350 case PERF_RECORD_AUX_OUTPUT_HW_ID: 1351 return tool->aux_output_hw_id(tool, event, sample, machine); 1352 default: 1353 ++evlist->stats.nr_unknown_events; 1354 return -1; 1355 } 1356 } 1357 1358 static int perf_session__deliver_event(struct perf_session *session, 1359 union perf_event *event, 1360 const struct perf_tool *tool, 1361 u64 file_offset, 1362 const char *file_path) 1363 { 1364 struct perf_sample sample; 1365 int ret; 1366 1367 perf_sample__init(&sample, /*all=*/false); 1368 ret = evlist__parse_sample(session->evlist, event, &sample); 1369 if (ret) { 1370 pr_err("Can't parse sample, err = %d\n", ret); 1371 goto out; 1372 } 1373 1374 ret = auxtrace__process_event(session, event, &sample, tool); 1375 if (ret < 0) 1376 goto out; 1377 if (ret > 0) { 1378 ret = 0; 1379 goto out; 1380 } 1381 1382 ret = machines__deliver_event(&session->machines, session->evlist, 1383 event, &sample, tool, file_offset, file_path); 1384 1385 if (dump_trace && sample.aux_sample.size) 1386 auxtrace__dump_auxtrace_sample(session, &sample); 1387 out: 1388 perf_sample__exit(&sample); 1389 return ret; 1390 } 1391 1392 static s64 perf_session__process_user_event(struct perf_session *session, 1393 union perf_event *event, 1394 u64 file_offset, 1395 const char *file_path) 1396 { 1397 struct ordered_events *oe = &session->ordered_events; 1398 const struct perf_tool *tool = session->tool; 1399 struct perf_sample sample; 1400 int fd = perf_data__fd(session->data); 1401 int err; 1402 1403 perf_sample__init(&sample, /*all=*/true); 1404 if ((event->header.type != PERF_RECORD_COMPRESSED && 1405 event->header.type != PERF_RECORD_COMPRESSED2) || 1406 perf_tool__compressed_is_stub(tool)) 1407 dump_event(session->evlist, event, file_offset, &sample, file_path); 1408 1409 /* These events are processed right away */ 1410 switch (event->header.type) { 1411 case PERF_RECORD_HEADER_ATTR: 1412 err = tool->attr(tool, event, &session->evlist); 1413 if (err == 0) { 1414 perf_session__set_id_hdr_size(session); 1415 perf_session__set_comm_exec(session); 1416 } 1417 break; 1418 case PERF_RECORD_EVENT_UPDATE: 1419 err = tool->event_update(tool, event, &session->evlist); 1420 break; 1421 case PERF_RECORD_HEADER_EVENT_TYPE: 1422 /* 1423 * Deprecated, but we need to handle it for sake 1424 * of old data files create in pipe mode. 1425 */ 1426 err = 0; 1427 break; 1428 case PERF_RECORD_HEADER_TRACING_DATA: 1429 /* 1430 * Setup for reading amidst mmap, but only when we 1431 * are in 'file' mode. The 'pipe' fd is in proper 1432 * place already. 1433 */ 1434 if (!perf_data__is_pipe(session->data)) 1435 lseek(fd, file_offset, SEEK_SET); 1436 err = tool->tracing_data(session, event); 1437 break; 1438 case PERF_RECORD_HEADER_BUILD_ID: 1439 err = tool->build_id(session, event); 1440 break; 1441 case PERF_RECORD_FINISHED_ROUND: 1442 err = tool->finished_round(tool, event, oe); 1443 break; 1444 case PERF_RECORD_ID_INDEX: 1445 err = tool->id_index(session, event); 1446 break; 1447 case PERF_RECORD_AUXTRACE_INFO: 1448 err = tool->auxtrace_info(session, event); 1449 break; 1450 case PERF_RECORD_AUXTRACE: 1451 /* 1452 * Setup for reading amidst mmap, but only when we 1453 * are in 'file' mode. The 'pipe' fd is in proper 1454 * place already. 1455 */ 1456 if (!perf_data__is_pipe(session->data)) 1457 lseek(fd, file_offset + event->header.size, SEEK_SET); 1458 err = tool->auxtrace(session, event); 1459 break; 1460 case PERF_RECORD_AUXTRACE_ERROR: 1461 perf_session__auxtrace_error_inc(session, event); 1462 err = tool->auxtrace_error(session, event); 1463 break; 1464 case PERF_RECORD_THREAD_MAP: 1465 err = tool->thread_map(session, event); 1466 break; 1467 case PERF_RECORD_CPU_MAP: 1468 err = tool->cpu_map(session, event); 1469 break; 1470 case PERF_RECORD_STAT_CONFIG: 1471 err = tool->stat_config(session, event); 1472 break; 1473 case PERF_RECORD_STAT: 1474 err = tool->stat(session, event); 1475 break; 1476 case PERF_RECORD_STAT_ROUND: 1477 err = tool->stat_round(session, event); 1478 break; 1479 case PERF_RECORD_TIME_CONV: 1480 session->time_conv = event->time_conv; 1481 err = tool->time_conv(session, event); 1482 break; 1483 case PERF_RECORD_HEADER_FEATURE: 1484 err = tool->feature(session, event); 1485 break; 1486 case PERF_RECORD_COMPRESSED: 1487 case PERF_RECORD_COMPRESSED2: 1488 err = tool->compressed(session, event, file_offset, file_path); 1489 if (err) 1490 dump_event(session->evlist, event, file_offset, &sample, file_path); 1491 break; 1492 case PERF_RECORD_FINISHED_INIT: 1493 err = tool->finished_init(session, event); 1494 break; 1495 case PERF_RECORD_BPF_METADATA: 1496 err = tool->bpf_metadata(session, event); 1497 break; 1498 default: 1499 err = -EINVAL; 1500 break; 1501 } 1502 perf_sample__exit(&sample); 1503 return err; 1504 } 1505 1506 int perf_session__deliver_synth_event(struct perf_session *session, 1507 union perf_event *event, 1508 struct perf_sample *sample) 1509 { 1510 struct evlist *evlist = session->evlist; 1511 const struct perf_tool *tool = session->tool; 1512 1513 events_stats__inc(&evlist->stats, event->header.type); 1514 1515 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1516 return perf_session__process_user_event(session, event, 0, NULL); 1517 1518 return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0, NULL); 1519 } 1520 1521 int perf_session__deliver_synth_attr_event(struct perf_session *session, 1522 const struct perf_event_attr *attr, 1523 u64 id) 1524 { 1525 union { 1526 struct { 1527 struct perf_record_header_attr attr; 1528 u64 ids[1]; 1529 } attr_id; 1530 union perf_event ev; 1531 } ev = { 1532 .attr_id.attr.header.type = PERF_RECORD_HEADER_ATTR, 1533 .attr_id.attr.header.size = sizeof(ev.attr_id), 1534 .attr_id.ids[0] = id, 1535 }; 1536 1537 if (attr->size != sizeof(ev.attr_id.attr.attr)) { 1538 pr_debug("Unexpected perf_event_attr size\n"); 1539 return -EINVAL; 1540 } 1541 ev.attr_id.attr.attr = *attr; 1542 return perf_session__deliver_synth_event(session, &ev.ev, NULL); 1543 } 1544 1545 static void event_swap(union perf_event *event, bool sample_id_all) 1546 { 1547 perf_event__swap_op swap; 1548 1549 swap = perf_event__swap_ops[event->header.type]; 1550 if (swap) 1551 swap(event, sample_id_all); 1552 } 1553 1554 int perf_session__peek_event(struct perf_session *session, off_t file_offset, 1555 void *buf, size_t buf_sz, 1556 union perf_event **event_ptr, 1557 struct perf_sample *sample) 1558 { 1559 union perf_event *event; 1560 size_t hdr_sz, rest; 1561 int fd; 1562 1563 if (session->one_mmap && !session->header.needs_swap) { 1564 event = file_offset - session->one_mmap_offset + 1565 session->one_mmap_addr; 1566 goto out_parse_sample; 1567 } 1568 1569 if (perf_data__is_pipe(session->data)) 1570 return -1; 1571 1572 fd = perf_data__fd(session->data); 1573 hdr_sz = sizeof(struct perf_event_header); 1574 1575 if (buf_sz < hdr_sz) 1576 return -1; 1577 1578 if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 || 1579 readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz) 1580 return -1; 1581 1582 event = (union perf_event *)buf; 1583 1584 if (session->header.needs_swap) 1585 perf_event_header__bswap(&event->header); 1586 1587 if (event->header.size < hdr_sz || event->header.size > buf_sz) 1588 return -1; 1589 1590 buf += hdr_sz; 1591 rest = event->header.size - hdr_sz; 1592 1593 if (readn(fd, buf, rest) != (ssize_t)rest) 1594 return -1; 1595 1596 if (session->header.needs_swap) 1597 event_swap(event, evlist__sample_id_all(session->evlist)); 1598 1599 out_parse_sample: 1600 1601 if (sample && event->header.type < PERF_RECORD_USER_TYPE_START && 1602 evlist__parse_sample(session->evlist, event, sample)) 1603 return -1; 1604 1605 *event_ptr = event; 1606 1607 return 0; 1608 } 1609 1610 int perf_session__peek_events(struct perf_session *session, u64 offset, 1611 u64 size, peek_events_cb_t cb, void *data) 1612 { 1613 u64 max_offset = offset + size; 1614 char buf[PERF_SAMPLE_MAX_SIZE]; 1615 union perf_event *event; 1616 int err; 1617 1618 do { 1619 err = perf_session__peek_event(session, offset, buf, 1620 PERF_SAMPLE_MAX_SIZE, &event, 1621 NULL); 1622 if (err) 1623 return err; 1624 1625 err = cb(session, event, offset, data); 1626 if (err) 1627 return err; 1628 1629 offset += event->header.size; 1630 if (event->header.type == PERF_RECORD_AUXTRACE) 1631 offset += event->auxtrace.size; 1632 1633 } while (offset < max_offset); 1634 1635 return err; 1636 } 1637 1638 static s64 perf_session__process_event(struct perf_session *session, 1639 union perf_event *event, u64 file_offset, 1640 const char *file_path) 1641 { 1642 struct evlist *evlist = session->evlist; 1643 const struct perf_tool *tool = session->tool; 1644 int ret; 1645 1646 if (session->header.needs_swap) 1647 event_swap(event, evlist__sample_id_all(evlist)); 1648 1649 if (event->header.type >= PERF_RECORD_HEADER_MAX) { 1650 /* perf should not support unaligned event, stop here. */ 1651 if (event->header.size % sizeof(u64)) 1652 return -EINVAL; 1653 1654 /* This perf is outdated and does not support the latest event type. */ 1655 ui__warning("Unsupported header type %u, please consider updating perf.\n", 1656 event->header.type); 1657 /* Skip unsupported event by returning its size. */ 1658 return event->header.size; 1659 } 1660 1661 events_stats__inc(&evlist->stats, event->header.type); 1662 1663 if (event->header.type >= PERF_RECORD_USER_TYPE_START) 1664 return perf_session__process_user_event(session, event, file_offset, file_path); 1665 1666 if (tool->ordered_events) { 1667 u64 timestamp = -1ULL; 1668 1669 ret = evlist__parse_sample_timestamp(evlist, event, ×tamp); 1670 if (ret && ret != -1) 1671 return ret; 1672 1673 ret = perf_session__queue_event(session, event, timestamp, file_offset, file_path); 1674 if (ret != -ETIME) 1675 return ret; 1676 } 1677 1678 return perf_session__deliver_event(session, event, tool, file_offset, file_path); 1679 } 1680 1681 void perf_event_header__bswap(struct perf_event_header *hdr) 1682 { 1683 hdr->type = bswap_32(hdr->type); 1684 hdr->misc = bswap_16(hdr->misc); 1685 hdr->size = bswap_16(hdr->size); 1686 } 1687 1688 struct thread *perf_session__findnew(struct perf_session *session, pid_t pid) 1689 { 1690 return machine__findnew_thread(&session->machines.host, -1, pid); 1691 } 1692 1693 int perf_session__register_idle_thread(struct perf_session *session) 1694 { 1695 struct thread *thread = machine__idle_thread(&session->machines.host); 1696 1697 /* machine__idle_thread() got the thread, so put it */ 1698 thread__put(thread); 1699 return thread ? 0 : -1; 1700 } 1701 1702 static void 1703 perf_session__warn_order(const struct perf_session *session) 1704 { 1705 const struct ordered_events *oe = &session->ordered_events; 1706 struct evsel *evsel; 1707 bool should_warn = true; 1708 1709 evlist__for_each_entry(session->evlist, evsel) { 1710 if (evsel->core.attr.write_backward) 1711 should_warn = false; 1712 } 1713 1714 if (!should_warn) 1715 return; 1716 if (oe->nr_unordered_events != 0) 1717 ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events); 1718 } 1719 1720 static void perf_session__warn_about_errors(const struct perf_session *session) 1721 { 1722 const struct events_stats *stats = &session->evlist->stats; 1723 1724 if (session->tool->lost == perf_event__process_lost && 1725 stats->nr_events[PERF_RECORD_LOST] != 0) { 1726 ui__warning("Processed %d events and lost %d chunks!\n\n" 1727 "Check IO/CPU overload!\n\n", 1728 stats->nr_events[0], 1729 stats->nr_events[PERF_RECORD_LOST]); 1730 } 1731 1732 if (session->tool->lost_samples == perf_event__process_lost_samples) { 1733 double drop_rate; 1734 1735 drop_rate = (double)stats->total_lost_samples / 1736 (double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples); 1737 if (drop_rate > 0.05) { 1738 ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n", 1739 stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples, 1740 drop_rate * 100.0); 1741 } 1742 } 1743 1744 if (session->tool->aux == perf_event__process_aux && 1745 stats->total_aux_lost != 0) { 1746 ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n", 1747 stats->total_aux_lost, 1748 stats->nr_events[PERF_RECORD_AUX]); 1749 } 1750 1751 if (session->tool->aux == perf_event__process_aux && 1752 stats->total_aux_partial != 0) { 1753 bool vmm_exclusive = false; 1754 1755 (void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive", 1756 &vmm_exclusive); 1757 1758 ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n" 1759 "Are you running a KVM guest in the background?%s\n\n", 1760 stats->total_aux_partial, 1761 stats->nr_events[PERF_RECORD_AUX], 1762 vmm_exclusive ? 1763 "\nReloading kvm_intel module with vmm_exclusive=0\n" 1764 "will reduce the gaps to only guest's timeslices." : 1765 ""); 1766 } 1767 1768 if (session->tool->aux == perf_event__process_aux && 1769 stats->total_aux_collision != 0) { 1770 ui__warning("AUX data detected collision %" PRIu64 " times out of %u!\n\n", 1771 stats->total_aux_collision, 1772 stats->nr_events[PERF_RECORD_AUX]); 1773 } 1774 1775 if (stats->nr_unknown_events != 0) { 1776 ui__warning("Found %u unknown events!\n\n" 1777 "Is this an older tool processing a perf.data " 1778 "file generated by a more recent tool?\n\n" 1779 "If that is not the case, consider " 1780 "reporting to linux-kernel@vger.kernel.org.\n\n", 1781 stats->nr_unknown_events); 1782 } 1783 1784 if (stats->nr_unknown_id != 0) { 1785 ui__warning("%u samples with id not present in the header\n", 1786 stats->nr_unknown_id); 1787 } 1788 1789 if (stats->nr_invalid_chains != 0) { 1790 ui__warning("Found invalid callchains!\n\n" 1791 "%u out of %u events were discarded for this reason.\n\n" 1792 "Consider reporting to linux-kernel@vger.kernel.org.\n\n", 1793 stats->nr_invalid_chains, 1794 stats->nr_events[PERF_RECORD_SAMPLE]); 1795 } 1796 1797 if (stats->nr_unprocessable_samples != 0) { 1798 ui__warning("%u unprocessable samples recorded.\n" 1799 "Do you have a KVM guest running and not using 'perf kvm'?\n", 1800 stats->nr_unprocessable_samples); 1801 } 1802 1803 perf_session__warn_order(session); 1804 1805 events_stats__auxtrace_error_warn(stats); 1806 1807 if (stats->nr_proc_map_timeout != 0) { 1808 ui__warning("%d map information files for pre-existing threads were\n" 1809 "not processed, if there are samples for addresses they\n" 1810 "will not be resolved, you may find out which are these\n" 1811 "threads by running with -v and redirecting the output\n" 1812 "to a file.\n" 1813 "The time limit to process proc map is too short?\n" 1814 "Increase it by --proc-map-timeout\n", 1815 stats->nr_proc_map_timeout); 1816 } 1817 } 1818 1819 static int perf_session__flush_thread_stack(struct thread *thread, 1820 void *p __maybe_unused) 1821 { 1822 return thread_stack__flush(thread); 1823 } 1824 1825 static int perf_session__flush_thread_stacks(struct perf_session *session) 1826 { 1827 return machines__for_each_thread(&session->machines, 1828 perf_session__flush_thread_stack, 1829 NULL); 1830 } 1831 1832 volatile sig_atomic_t session_done; 1833 1834 static int __perf_session__process_decomp_events(struct perf_session *session); 1835 1836 static int __perf_session__process_pipe_events(struct perf_session *session) 1837 { 1838 struct ordered_events *oe = &session->ordered_events; 1839 const struct perf_tool *tool = session->tool; 1840 struct ui_progress prog; 1841 union perf_event *event; 1842 uint32_t size, cur_size = 0; 1843 void *buf = NULL; 1844 s64 skip = 0; 1845 u64 head; 1846 ssize_t err; 1847 void *p; 1848 bool update_prog = false; 1849 1850 /* 1851 * If it's from a file saving pipe data (by redirection), it would have 1852 * a file name other than "-". Then we can get the total size and show 1853 * the progress. 1854 */ 1855 if (strcmp(session->data->path, "-") && session->data->file.size) { 1856 ui_progress__init_size(&prog, session->data->file.size, 1857 "Processing events..."); 1858 update_prog = true; 1859 } 1860 1861 head = 0; 1862 cur_size = sizeof(union perf_event); 1863 1864 buf = malloc(cur_size); 1865 if (!buf) 1866 return -errno; 1867 ordered_events__set_copy_on_queue(oe, true); 1868 more: 1869 event = buf; 1870 err = perf_data__read(session->data, event, 1871 sizeof(struct perf_event_header)); 1872 if (err <= 0) { 1873 if (err == 0) 1874 goto done; 1875 1876 pr_err("failed to read event header\n"); 1877 goto out_err; 1878 } 1879 1880 if (session->header.needs_swap) 1881 perf_event_header__bswap(&event->header); 1882 1883 size = event->header.size; 1884 if (size < sizeof(struct perf_event_header)) { 1885 pr_err("bad event header size\n"); 1886 goto out_err; 1887 } 1888 1889 if (size > cur_size) { 1890 void *new = realloc(buf, size); 1891 if (!new) { 1892 pr_err("failed to allocate memory to read event\n"); 1893 goto out_err; 1894 } 1895 buf = new; 1896 cur_size = size; 1897 event = buf; 1898 } 1899 p = event; 1900 p += sizeof(struct perf_event_header); 1901 1902 if (size - sizeof(struct perf_event_header)) { 1903 err = perf_data__read(session->data, p, 1904 size - sizeof(struct perf_event_header)); 1905 if (err <= 0) { 1906 if (err == 0) { 1907 pr_err("unexpected end of event stream\n"); 1908 goto done; 1909 } 1910 1911 pr_err("failed to read event data\n"); 1912 goto out_err; 1913 } 1914 } 1915 1916 if ((skip = perf_session__process_event(session, event, head, "pipe")) < 0) { 1917 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 1918 head, event->header.size, event->header.type); 1919 err = -EINVAL; 1920 goto out_err; 1921 } 1922 1923 head += size; 1924 1925 if (skip > 0) 1926 head += skip; 1927 1928 err = __perf_session__process_decomp_events(session); 1929 if (err) 1930 goto out_err; 1931 1932 if (update_prog) 1933 ui_progress__update(&prog, size); 1934 1935 if (!session_done()) 1936 goto more; 1937 done: 1938 /* do the final flush for ordered samples */ 1939 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 1940 if (err) 1941 goto out_err; 1942 err = auxtrace__flush_events(session, tool); 1943 if (err) 1944 goto out_err; 1945 err = perf_session__flush_thread_stacks(session); 1946 out_err: 1947 free(buf); 1948 if (update_prog) 1949 ui_progress__finish(); 1950 if (!tool->no_warn) 1951 perf_session__warn_about_errors(session); 1952 ordered_events__free(&session->ordered_events); 1953 auxtrace__free_events(session); 1954 return err; 1955 } 1956 1957 static union perf_event * 1958 prefetch_event(char *buf, u64 head, size_t mmap_size, 1959 bool needs_swap, union perf_event *error) 1960 { 1961 union perf_event *event; 1962 u16 event_size; 1963 1964 /* 1965 * Ensure we have enough space remaining to read 1966 * the size of the event in the headers. 1967 */ 1968 if (head + sizeof(event->header) > mmap_size) 1969 return NULL; 1970 1971 event = (union perf_event *)(buf + head); 1972 if (needs_swap) 1973 perf_event_header__bswap(&event->header); 1974 1975 event_size = event->header.size; 1976 if (head + event_size <= mmap_size) 1977 return event; 1978 1979 /* We're not fetching the event so swap back again */ 1980 if (needs_swap) 1981 perf_event_header__bswap(&event->header); 1982 1983 /* Check if the event fits into the next mmapped buf. */ 1984 if (event_size <= mmap_size - head % page_size) { 1985 /* Remap buf and fetch again. */ 1986 return NULL; 1987 } 1988 1989 /* Invalid input. Event size should never exceed mmap_size. */ 1990 pr_debug("%s: head=%#" PRIx64 " event->header.size=%#x, mmap_size=%#zx:" 1991 " fuzzed or compressed perf.data?\n", __func__, head, event_size, mmap_size); 1992 1993 return error; 1994 } 1995 1996 static union perf_event * 1997 fetch_mmaped_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 1998 { 1999 return prefetch_event(buf, head, mmap_size, needs_swap, ERR_PTR(-EINVAL)); 2000 } 2001 2002 static union perf_event * 2003 fetch_decomp_event(u64 head, size_t mmap_size, char *buf, bool needs_swap) 2004 { 2005 return prefetch_event(buf, head, mmap_size, needs_swap, NULL); 2006 } 2007 2008 static int __perf_session__process_decomp_events(struct perf_session *session) 2009 { 2010 s64 skip; 2011 u64 size; 2012 struct decomp *decomp = session->active_decomp->decomp_last; 2013 2014 if (!decomp) 2015 return 0; 2016 2017 while (decomp->head < decomp->size && !session_done()) { 2018 union perf_event *event = fetch_decomp_event(decomp->head, decomp->size, decomp->data, 2019 session->header.needs_swap); 2020 2021 if (!event) 2022 break; 2023 2024 size = event->header.size; 2025 2026 if (size < sizeof(struct perf_event_header) || 2027 (skip = perf_session__process_event(session, event, decomp->file_pos, 2028 decomp->file_path)) < 0) { 2029 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n", 2030 decomp->file_pos + decomp->head, event->header.size, event->header.type); 2031 return -EINVAL; 2032 } 2033 2034 if (skip) 2035 size += skip; 2036 2037 decomp->head += size; 2038 } 2039 2040 return 0; 2041 } 2042 2043 /* 2044 * On 64bit we can mmap the data file in one go. No need for tiny mmap 2045 * slices. On 32bit we use 32MB. 2046 */ 2047 #if BITS_PER_LONG == 64 2048 #define MMAP_SIZE ULLONG_MAX 2049 #define NUM_MMAPS 1 2050 #else 2051 #define MMAP_SIZE (32 * 1024 * 1024ULL) 2052 #define NUM_MMAPS 128 2053 #endif 2054 2055 struct reader; 2056 2057 typedef s64 (*reader_cb_t)(struct perf_session *session, 2058 union perf_event *event, 2059 u64 file_offset, 2060 const char *file_path); 2061 2062 struct reader { 2063 int fd; 2064 const char *path; 2065 u64 data_size; 2066 u64 data_offset; 2067 reader_cb_t process; 2068 bool in_place_update; 2069 char *mmaps[NUM_MMAPS]; 2070 size_t mmap_size; 2071 int mmap_idx; 2072 char *mmap_cur; 2073 u64 file_pos; 2074 u64 file_offset; 2075 u64 head; 2076 u64 size; 2077 bool done; 2078 struct zstd_data zstd_data; 2079 struct decomp_data decomp_data; 2080 }; 2081 2082 static int 2083 reader__init(struct reader *rd, bool *one_mmap) 2084 { 2085 u64 data_size = rd->data_size; 2086 char **mmaps = rd->mmaps; 2087 2088 rd->head = rd->data_offset; 2089 data_size += rd->data_offset; 2090 2091 rd->mmap_size = MMAP_SIZE; 2092 if (rd->mmap_size > data_size) { 2093 rd->mmap_size = data_size; 2094 if (one_mmap) 2095 *one_mmap = true; 2096 } 2097 2098 memset(mmaps, 0, sizeof(rd->mmaps)); 2099 2100 if (zstd_init(&rd->zstd_data, 0)) 2101 return -1; 2102 rd->decomp_data.zstd_decomp = &rd->zstd_data; 2103 2104 return 0; 2105 } 2106 2107 static void 2108 reader__release_decomp(struct reader *rd) 2109 { 2110 perf_decomp__release_events(rd->decomp_data.decomp); 2111 zstd_fini(&rd->zstd_data); 2112 } 2113 2114 static int 2115 reader__mmap(struct reader *rd, struct perf_session *session) 2116 { 2117 int mmap_prot, mmap_flags; 2118 char *buf, **mmaps = rd->mmaps; 2119 u64 page_offset; 2120 2121 mmap_prot = PROT_READ; 2122 mmap_flags = MAP_SHARED; 2123 2124 if (rd->in_place_update) { 2125 mmap_prot |= PROT_WRITE; 2126 } else if (session->header.needs_swap) { 2127 mmap_prot |= PROT_WRITE; 2128 mmap_flags = MAP_PRIVATE; 2129 } 2130 2131 if (mmaps[rd->mmap_idx]) { 2132 munmap(mmaps[rd->mmap_idx], rd->mmap_size); 2133 mmaps[rd->mmap_idx] = NULL; 2134 } 2135 2136 page_offset = page_size * (rd->head / page_size); 2137 rd->file_offset += page_offset; 2138 rd->head -= page_offset; 2139 2140 buf = mmap(NULL, rd->mmap_size, mmap_prot, mmap_flags, rd->fd, 2141 rd->file_offset); 2142 if (buf == MAP_FAILED) { 2143 pr_err("failed to mmap file\n"); 2144 return -errno; 2145 } 2146 mmaps[rd->mmap_idx] = rd->mmap_cur = buf; 2147 rd->mmap_idx = (rd->mmap_idx + 1) & (ARRAY_SIZE(rd->mmaps) - 1); 2148 rd->file_pos = rd->file_offset + rd->head; 2149 if (session->one_mmap) { 2150 session->one_mmap_addr = buf; 2151 session->one_mmap_offset = rd->file_offset; 2152 } 2153 2154 return 0; 2155 } 2156 2157 enum { 2158 READER_OK, 2159 READER_NODATA, 2160 }; 2161 2162 static int 2163 reader__read_event(struct reader *rd, struct perf_session *session, 2164 struct ui_progress *prog) 2165 { 2166 u64 size; 2167 int err = READER_OK; 2168 union perf_event *event; 2169 s64 skip; 2170 2171 event = fetch_mmaped_event(rd->head, rd->mmap_size, rd->mmap_cur, 2172 session->header.needs_swap); 2173 if (IS_ERR(event)) 2174 return PTR_ERR(event); 2175 2176 if (!event) 2177 return READER_NODATA; 2178 2179 size = event->header.size; 2180 2181 skip = -EINVAL; 2182 2183 if (size < sizeof(struct perf_event_header) || 2184 (skip = rd->process(session, event, rd->file_pos, rd->path)) < 0) { 2185 pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n", 2186 rd->file_offset + rd->head, event->header.size, 2187 event->header.type, strerror(-skip)); 2188 err = skip; 2189 goto out; 2190 } 2191 2192 if (skip) 2193 size += skip; 2194 2195 rd->size += size; 2196 rd->head += size; 2197 rd->file_pos += size; 2198 2199 err = __perf_session__process_decomp_events(session); 2200 if (err) 2201 goto out; 2202 2203 ui_progress__update(prog, size); 2204 2205 out: 2206 return err; 2207 } 2208 2209 static inline bool 2210 reader__eof(struct reader *rd) 2211 { 2212 return (rd->file_pos >= rd->data_size + rd->data_offset); 2213 } 2214 2215 static int 2216 reader__process_events(struct reader *rd, struct perf_session *session, 2217 struct ui_progress *prog) 2218 { 2219 int err; 2220 2221 err = reader__init(rd, &session->one_mmap); 2222 if (err) 2223 goto out; 2224 2225 session->active_decomp = &rd->decomp_data; 2226 2227 remap: 2228 err = reader__mmap(rd, session); 2229 if (err) 2230 goto out; 2231 2232 more: 2233 err = reader__read_event(rd, session, prog); 2234 if (err < 0) 2235 goto out; 2236 else if (err == READER_NODATA) 2237 goto remap; 2238 2239 if (session_done()) 2240 goto out; 2241 2242 if (!reader__eof(rd)) 2243 goto more; 2244 2245 out: 2246 session->active_decomp = &session->decomp_data; 2247 return err; 2248 } 2249 2250 static s64 process_simple(struct perf_session *session, 2251 union perf_event *event, 2252 u64 file_offset, 2253 const char *file_path) 2254 { 2255 return perf_session__process_event(session, event, file_offset, file_path); 2256 } 2257 2258 static int __perf_session__process_events(struct perf_session *session) 2259 { 2260 struct reader rd = { 2261 .fd = perf_data__fd(session->data), 2262 .path = session->data->file.path, 2263 .data_size = session->header.data_size, 2264 .data_offset = session->header.data_offset, 2265 .process = process_simple, 2266 .in_place_update = session->data->in_place_update, 2267 }; 2268 struct ordered_events *oe = &session->ordered_events; 2269 const struct perf_tool *tool = session->tool; 2270 struct ui_progress prog; 2271 int err; 2272 2273 if (rd.data_size == 0) 2274 return -1; 2275 2276 ui_progress__init_size(&prog, rd.data_size, "Processing events..."); 2277 2278 err = reader__process_events(&rd, session, &prog); 2279 if (err) 2280 goto out_err; 2281 /* do the final flush for ordered samples */ 2282 err = ordered_events__flush(oe, OE_FLUSH__FINAL); 2283 if (err) 2284 goto out_err; 2285 err = auxtrace__flush_events(session, tool); 2286 if (err) 2287 goto out_err; 2288 err = perf_session__flush_thread_stacks(session); 2289 out_err: 2290 ui_progress__finish(); 2291 if (!tool->no_warn) 2292 perf_session__warn_about_errors(session); 2293 /* 2294 * We may switching perf.data output, make ordered_events 2295 * reusable. 2296 */ 2297 ordered_events__reinit(&session->ordered_events); 2298 auxtrace__free_events(session); 2299 reader__release_decomp(&rd); 2300 session->one_mmap = false; 2301 return err; 2302 } 2303 2304 /* 2305 * Processing 2 MB of data from each reader in sequence, 2306 * because that's the way the ordered events sorting works 2307 * most efficiently. 2308 */ 2309 #define READER_MAX_SIZE (2 * 1024 * 1024) 2310 2311 /* 2312 * This function reads, merge and process directory data. 2313 * It assumens the version 1 of directory data, where each 2314 * data file holds per-cpu data, already sorted by kernel. 2315 */ 2316 static int __perf_session__process_dir_events(struct perf_session *session) 2317 { 2318 struct perf_data *data = session->data; 2319 const struct perf_tool *tool = session->tool; 2320 int i, ret, readers, nr_readers; 2321 struct ui_progress prog; 2322 u64 total_size = perf_data__size(session->data); 2323 struct reader *rd; 2324 2325 ui_progress__init_size(&prog, total_size, "Processing events..."); 2326 2327 nr_readers = 1; 2328 for (i = 0; i < data->dir.nr; i++) { 2329 if (data->dir.files[i].size) 2330 nr_readers++; 2331 } 2332 2333 rd = zalloc(nr_readers * sizeof(struct reader)); 2334 if (!rd) 2335 return -ENOMEM; 2336 2337 rd[0] = (struct reader) { 2338 .fd = perf_data__fd(session->data), 2339 .path = session->data->file.path, 2340 .data_size = session->header.data_size, 2341 .data_offset = session->header.data_offset, 2342 .process = process_simple, 2343 .in_place_update = session->data->in_place_update, 2344 }; 2345 ret = reader__init(&rd[0], NULL); 2346 if (ret) 2347 goto out_err; 2348 ret = reader__mmap(&rd[0], session); 2349 if (ret) 2350 goto out_err; 2351 readers = 1; 2352 2353 for (i = 0; i < data->dir.nr; i++) { 2354 if (!data->dir.files[i].size) 2355 continue; 2356 rd[readers] = (struct reader) { 2357 .fd = data->dir.files[i].fd, 2358 .path = data->dir.files[i].path, 2359 .data_size = data->dir.files[i].size, 2360 .data_offset = 0, 2361 .process = process_simple, 2362 .in_place_update = session->data->in_place_update, 2363 }; 2364 ret = reader__init(&rd[readers], NULL); 2365 if (ret) 2366 goto out_err; 2367 ret = reader__mmap(&rd[readers], session); 2368 if (ret) 2369 goto out_err; 2370 readers++; 2371 } 2372 2373 i = 0; 2374 while (readers) { 2375 if (session_done()) 2376 break; 2377 2378 if (rd[i].done) { 2379 i = (i + 1) % nr_readers; 2380 continue; 2381 } 2382 if (reader__eof(&rd[i])) { 2383 rd[i].done = true; 2384 readers--; 2385 continue; 2386 } 2387 2388 session->active_decomp = &rd[i].decomp_data; 2389 ret = reader__read_event(&rd[i], session, &prog); 2390 if (ret < 0) { 2391 goto out_err; 2392 } else if (ret == READER_NODATA) { 2393 ret = reader__mmap(&rd[i], session); 2394 if (ret) 2395 goto out_err; 2396 } 2397 2398 if (rd[i].size >= READER_MAX_SIZE) { 2399 rd[i].size = 0; 2400 i = (i + 1) % nr_readers; 2401 } 2402 } 2403 2404 ret = ordered_events__flush(&session->ordered_events, OE_FLUSH__FINAL); 2405 if (ret) 2406 goto out_err; 2407 2408 ret = perf_session__flush_thread_stacks(session); 2409 out_err: 2410 ui_progress__finish(); 2411 2412 if (!tool->no_warn) 2413 perf_session__warn_about_errors(session); 2414 2415 /* 2416 * We may switching perf.data output, make ordered_events 2417 * reusable. 2418 */ 2419 ordered_events__reinit(&session->ordered_events); 2420 2421 session->one_mmap = false; 2422 2423 session->active_decomp = &session->decomp_data; 2424 for (i = 0; i < nr_readers; i++) 2425 reader__release_decomp(&rd[i]); 2426 zfree(&rd); 2427 2428 return ret; 2429 } 2430 2431 int perf_session__process_events(struct perf_session *session) 2432 { 2433 if (perf_session__register_idle_thread(session) < 0) 2434 return -ENOMEM; 2435 2436 if (perf_data__is_pipe(session->data)) 2437 return __perf_session__process_pipe_events(session); 2438 2439 if (perf_data__is_dir(session->data) && session->data->dir.nr) 2440 return __perf_session__process_dir_events(session); 2441 2442 return __perf_session__process_events(session); 2443 } 2444 2445 bool perf_session__has_traces(struct perf_session *session, const char *msg) 2446 { 2447 struct evsel *evsel; 2448 2449 evlist__for_each_entry(session->evlist, evsel) { 2450 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT) 2451 return true; 2452 } 2453 2454 pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg); 2455 return false; 2456 } 2457 2458 bool perf_session__has_switch_events(struct perf_session *session) 2459 { 2460 struct evsel *evsel; 2461 2462 evlist__for_each_entry(session->evlist, evsel) { 2463 if (evsel->core.attr.context_switch) 2464 return true; 2465 } 2466 2467 return false; 2468 } 2469 2470 int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr) 2471 { 2472 char *bracket; 2473 struct ref_reloc_sym *ref; 2474 struct kmap *kmap; 2475 2476 ref = zalloc(sizeof(struct ref_reloc_sym)); 2477 if (ref == NULL) 2478 return -ENOMEM; 2479 2480 ref->name = strdup(symbol_name); 2481 if (ref->name == NULL) { 2482 free(ref); 2483 return -ENOMEM; 2484 } 2485 2486 bracket = strchr(ref->name, ']'); 2487 if (bracket) 2488 *bracket = '\0'; 2489 2490 ref->addr = addr; 2491 2492 kmap = map__kmap(map); 2493 if (kmap) 2494 kmap->ref_reloc_sym = ref; 2495 2496 return 0; 2497 } 2498 2499 size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp) 2500 { 2501 return machines__fprintf_dsos(&session->machines, fp); 2502 } 2503 2504 size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp, 2505 bool (skip)(struct dso *dso, int parm), int parm) 2506 { 2507 return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm); 2508 } 2509 2510 size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp) 2511 { 2512 size_t ret; 2513 const char *msg = ""; 2514 2515 if (perf_header__has_feat(&session->header, HEADER_AUXTRACE)) 2516 msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)"; 2517 2518 ret = fprintf(fp, "\nAggregated stats:%s\n", msg); 2519 2520 ret += events_stats__fprintf(&session->evlist->stats, fp); 2521 return ret; 2522 } 2523 2524 size_t perf_session__fprintf(struct perf_session *session, FILE *fp) 2525 { 2526 /* 2527 * FIXME: Here we have to actually print all the machines in this 2528 * session, not just the host... 2529 */ 2530 return machine__fprintf(&session->machines.host, fp); 2531 } 2532 2533 void perf_session__dump_kmaps(struct perf_session *session) 2534 { 2535 int save_verbose = verbose; 2536 2537 fflush(stdout); 2538 fprintf(stderr, "Kernel and module maps:\n"); 2539 verbose = 0; /* Suppress verbose to print a summary only */ 2540 maps__fprintf(machine__kernel_maps(&session->machines.host), stderr); 2541 verbose = save_verbose; 2542 } 2543 2544 struct evsel *perf_session__find_first_evtype(struct perf_session *session, 2545 unsigned int type) 2546 { 2547 struct evsel *pos; 2548 2549 evlist__for_each_entry(session->evlist, pos) { 2550 if (pos->core.attr.type == type) 2551 return pos; 2552 } 2553 return NULL; 2554 } 2555 2556 int perf_session__cpu_bitmap(struct perf_session *session, 2557 const char *cpu_list, unsigned long *cpu_bitmap) 2558 { 2559 int i, err = -1; 2560 struct perf_cpu_map *map; 2561 int nr_cpus = min(session->header.env.nr_cpus_avail, MAX_NR_CPUS); 2562 struct perf_cpu cpu; 2563 2564 for (i = 0; i < PERF_TYPE_MAX; ++i) { 2565 struct evsel *evsel; 2566 2567 evsel = perf_session__find_first_evtype(session, i); 2568 if (!evsel) 2569 continue; 2570 2571 if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) { 2572 pr_err("File does not contain CPU events. " 2573 "Remove -C option to proceed.\n"); 2574 return -1; 2575 } 2576 } 2577 2578 map = perf_cpu_map__new(cpu_list); 2579 if (map == NULL) { 2580 pr_err("Invalid cpu_list\n"); 2581 return -1; 2582 } 2583 2584 perf_cpu_map__for_each_cpu(cpu, i, map) { 2585 if (cpu.cpu >= nr_cpus) { 2586 pr_err("Requested CPU %d too large. " 2587 "Consider raising MAX_NR_CPUS\n", cpu.cpu); 2588 goto out_delete_map; 2589 } 2590 2591 __set_bit(cpu.cpu, cpu_bitmap); 2592 } 2593 2594 err = 0; 2595 2596 out_delete_map: 2597 perf_cpu_map__put(map); 2598 return err; 2599 } 2600 2601 void perf_session__fprintf_info(struct perf_session *session, FILE *fp, 2602 bool full) 2603 { 2604 if (session == NULL || fp == NULL) 2605 return; 2606 2607 fprintf(fp, "# ========\n"); 2608 perf_header__fprintf_info(session, fp, full); 2609 fprintf(fp, "# ========\n#\n"); 2610 } 2611 2612 static int perf_session__register_guest(struct perf_session *session, pid_t machine_pid) 2613 { 2614 struct machine *machine = machines__findnew(&session->machines, machine_pid); 2615 struct thread *thread; 2616 2617 if (!machine) 2618 return -ENOMEM; 2619 2620 machine->single_address_space = session->machines.host.single_address_space; 2621 2622 thread = machine__idle_thread(machine); 2623 if (!thread) 2624 return -ENOMEM; 2625 thread__put(thread); 2626 2627 machine->kallsyms_filename = perf_data__guest_kallsyms_name(session->data, machine_pid); 2628 2629 return 0; 2630 } 2631 2632 static int perf_session__set_guest_cpu(struct perf_session *session, pid_t pid, 2633 pid_t tid, int guest_cpu) 2634 { 2635 struct machine *machine = &session->machines.host; 2636 struct thread *thread = machine__findnew_thread(machine, pid, tid); 2637 2638 if (!thread) 2639 return -ENOMEM; 2640 thread__set_guest_cpu(thread, guest_cpu); 2641 thread__put(thread); 2642 2643 return 0; 2644 } 2645 2646 int perf_event__process_id_index(struct perf_session *session, 2647 union perf_event *event) 2648 { 2649 struct evlist *evlist = session->evlist; 2650 struct perf_record_id_index *ie = &event->id_index; 2651 size_t sz = ie->header.size - sizeof(*ie); 2652 size_t i, nr, max_nr; 2653 size_t e1_sz = sizeof(struct id_index_entry); 2654 size_t e2_sz = sizeof(struct id_index_entry_2); 2655 size_t etot_sz = e1_sz + e2_sz; 2656 struct id_index_entry_2 *e2; 2657 pid_t last_pid = 0; 2658 2659 max_nr = sz / e1_sz; 2660 nr = ie->nr; 2661 if (nr > max_nr) { 2662 printf("Too big: nr %zu max_nr %zu\n", nr, max_nr); 2663 return -EINVAL; 2664 } 2665 2666 if (sz >= nr * etot_sz) { 2667 max_nr = sz / etot_sz; 2668 if (nr > max_nr) { 2669 printf("Too big2: nr %zu max_nr %zu\n", nr, max_nr); 2670 return -EINVAL; 2671 } 2672 e2 = (void *)ie + sizeof(*ie) + nr * e1_sz; 2673 } else { 2674 e2 = NULL; 2675 } 2676 2677 if (dump_trace) 2678 fprintf(stdout, " nr: %zu\n", nr); 2679 2680 for (i = 0; i < nr; i++, (e2 ? e2++ : 0)) { 2681 struct id_index_entry *e = &ie->entries[i]; 2682 struct perf_sample_id *sid; 2683 int ret; 2684 2685 if (dump_trace) { 2686 fprintf(stdout, " ... id: %"PRI_lu64, e->id); 2687 fprintf(stdout, " idx: %"PRI_lu64, e->idx); 2688 fprintf(stdout, " cpu: %"PRI_ld64, e->cpu); 2689 fprintf(stdout, " tid: %"PRI_ld64, e->tid); 2690 if (e2) { 2691 fprintf(stdout, " machine_pid: %"PRI_ld64, e2->machine_pid); 2692 fprintf(stdout, " vcpu: %"PRI_lu64"\n", e2->vcpu); 2693 } else { 2694 fprintf(stdout, "\n"); 2695 } 2696 } 2697 2698 sid = evlist__id2sid(evlist, e->id); 2699 if (!sid) 2700 return -ENOENT; 2701 2702 sid->idx = e->idx; 2703 sid->cpu.cpu = e->cpu; 2704 sid->tid = e->tid; 2705 2706 if (!e2) 2707 continue; 2708 2709 sid->machine_pid = e2->machine_pid; 2710 sid->vcpu.cpu = e2->vcpu; 2711 2712 if (!sid->machine_pid) 2713 continue; 2714 2715 if (sid->machine_pid != last_pid) { 2716 ret = perf_session__register_guest(session, sid->machine_pid); 2717 if (ret) 2718 return ret; 2719 last_pid = sid->machine_pid; 2720 perf_guest = true; 2721 } 2722 2723 ret = perf_session__set_guest_cpu(session, sid->machine_pid, e->tid, e2->vcpu); 2724 if (ret) 2725 return ret; 2726 } 2727 return 0; 2728 } 2729 2730 int perf_session__dsos_hit_all(struct perf_session *session) 2731 { 2732 struct rb_node *nd; 2733 int err; 2734 2735 err = machine__hit_all_dsos(&session->machines.host); 2736 if (err) 2737 return err; 2738 2739 for (nd = rb_first_cached(&session->machines.guests); nd; 2740 nd = rb_next(nd)) { 2741 struct machine *pos = rb_entry(nd, struct machine, rb_node); 2742 2743 err = machine__hit_all_dsos(pos); 2744 if (err) 2745 return err; 2746 } 2747 2748 return 0; 2749 } 2750