1 /* 2 * builtin-trace.c 3 * 4 * Builtin 'trace' command: 5 * 6 * Display a continuously updated trace of any workload, CPU, specific PID, 7 * system wide, etc. Default format is loosely strace like, but any other 8 * event may be specified using --event. 9 * 10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 11 * 12 * Initially based on the 'trace' prototype by Thomas Gleixner: 13 * 14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 15 */ 16 17 #include "util/record.h" 18 #include <api/fs/tracing_path.h> 19 #include <bpf/bpf.h> 20 #include "util/bpf_map.h" 21 #include "util/rlimit.h" 22 #include "builtin.h" 23 #include "util/cgroup.h" 24 #include "util/color.h" 25 #include "util/config.h" 26 #include "util/debug.h" 27 #include "util/dso.h" 28 #include "util/env.h" 29 #include "util/event.h" 30 #include "util/evsel.h" 31 #include "util/evsel_fprintf.h" 32 #include "util/synthetic-events.h" 33 #include "util/evlist.h" 34 #include "util/evswitch.h" 35 #include "util/mmap.h" 36 #include <subcmd/pager.h> 37 #include <subcmd/exec-cmd.h> 38 #include "util/machine.h" 39 #include "util/map.h" 40 #include "util/symbol.h" 41 #include "util/path.h" 42 #include "util/session.h" 43 #include "util/thread.h" 44 #include <subcmd/parse-options.h> 45 #include "util/strlist.h" 46 #include "util/intlist.h" 47 #include "util/thread_map.h" 48 #include "util/stat.h" 49 #include "util/tool.h" 50 #include "util/util.h" 51 #include "trace/beauty/beauty.h" 52 #include "trace-event.h" 53 #include "util/parse-events.h" 54 #include "util/bpf-loader.h" 55 #include "util/tracepoint.h" 56 #include "callchain.h" 57 #include "print_binary.h" 58 #include "string2.h" 59 #include "syscalltbl.h" 60 #include "rb_resort.h" 61 #include "../perf.h" 62 63 #include <errno.h> 64 #include <inttypes.h> 65 #include <poll.h> 66 #include <signal.h> 67 #include <stdlib.h> 68 #include <string.h> 69 #include <linux/err.h> 70 #include <linux/filter.h> 71 #include <linux/kernel.h> 72 #include <linux/random.h> 73 #include <linux/stringify.h> 74 #include <linux/time64.h> 75 #include <linux/zalloc.h> 76 #include <fcntl.h> 77 #include <sys/sysmacros.h> 78 79 #include <linux/ctype.h> 80 #include <perf/mmap.h> 81 82 #ifdef HAVE_LIBTRACEEVENT 83 #include <traceevent/event-parse.h> 84 #endif 85 86 #ifndef O_CLOEXEC 87 # define O_CLOEXEC 02000000 88 #endif 89 90 #ifndef F_LINUX_SPECIFIC_BASE 91 # define F_LINUX_SPECIFIC_BASE 1024 92 #endif 93 94 #define RAW_SYSCALL_ARGS_NUM 6 95 96 /* 97 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 98 */ 99 struct syscall_arg_fmt { 100 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 101 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); 102 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 103 void *parm; 104 const char *name; 105 u16 nr_entries; // for arrays 106 bool show_zero; 107 }; 108 109 struct syscall_fmt { 110 const char *name; 111 const char *alias; 112 struct { 113 const char *sys_enter, 114 *sys_exit; 115 } bpf_prog_name; 116 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM]; 117 u8 nr_args; 118 bool errpid; 119 bool timeout; 120 bool hexret; 121 }; 122 123 struct trace { 124 struct perf_tool tool; 125 struct syscalltbl *sctbl; 126 struct { 127 struct syscall *table; 128 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY 129 struct bpf_map *sys_enter, 130 *sys_exit; 131 } prog_array; 132 struct { 133 struct evsel *sys_enter, 134 *sys_exit, 135 *augmented; 136 } events; 137 struct bpf_program *unaugmented_prog; 138 } syscalls; 139 struct { 140 struct bpf_map *map; 141 } dump; 142 struct record_opts opts; 143 struct evlist *evlist; 144 struct machine *host; 145 struct thread *current; 146 struct bpf_object *bpf_obj; 147 struct cgroup *cgroup; 148 u64 base_time; 149 FILE *output; 150 unsigned long nr_events; 151 unsigned long nr_events_printed; 152 unsigned long max_events; 153 struct evswitch evswitch; 154 struct strlist *ev_qualifier; 155 struct { 156 size_t nr; 157 int *entries; 158 } ev_qualifier_ids; 159 struct { 160 size_t nr; 161 pid_t *entries; 162 struct bpf_map *map; 163 } filter_pids; 164 double duration_filter; 165 double runtime_ms; 166 struct { 167 u64 vfs_getname, 168 proc_getname; 169 } stats; 170 unsigned int max_stack; 171 unsigned int min_stack; 172 int raw_augmented_syscalls_args_size; 173 bool raw_augmented_syscalls; 174 bool fd_path_disabled; 175 bool sort_events; 176 bool not_ev_qualifier; 177 bool live; 178 bool full_time; 179 bool sched; 180 bool multiple_threads; 181 bool summary; 182 bool summary_only; 183 bool errno_summary; 184 bool failure_only; 185 bool show_comm; 186 bool print_sample; 187 bool show_tool_stats; 188 bool trace_syscalls; 189 bool libtraceevent_print; 190 bool kernel_syscallchains; 191 s16 args_alignment; 192 bool show_tstamp; 193 bool show_duration; 194 bool show_zeros; 195 bool show_arg_names; 196 bool show_string_prefix; 197 bool force; 198 bool vfs_getname; 199 int trace_pgfaults; 200 char *perfconfig_events; 201 struct { 202 struct ordered_events data; 203 u64 last; 204 } oe; 205 }; 206 207 struct tp_field { 208 int offset; 209 union { 210 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 211 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 212 }; 213 }; 214 215 #define TP_UINT_FIELD(bits) \ 216 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 217 { \ 218 u##bits value; \ 219 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 220 return value; \ 221 } 222 223 TP_UINT_FIELD(8); 224 TP_UINT_FIELD(16); 225 TP_UINT_FIELD(32); 226 TP_UINT_FIELD(64); 227 228 #define TP_UINT_FIELD__SWAPPED(bits) \ 229 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 230 { \ 231 u##bits value; \ 232 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 233 return bswap_##bits(value);\ 234 } 235 236 TP_UINT_FIELD__SWAPPED(16); 237 TP_UINT_FIELD__SWAPPED(32); 238 TP_UINT_FIELD__SWAPPED(64); 239 240 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 241 { 242 field->offset = offset; 243 244 switch (size) { 245 case 1: 246 field->integer = tp_field__u8; 247 break; 248 case 2: 249 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 250 break; 251 case 4: 252 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 253 break; 254 case 8: 255 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 256 break; 257 default: 258 return -1; 259 } 260 261 return 0; 262 } 263 264 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 265 { 266 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 267 } 268 269 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 270 { 271 return sample->raw_data + field->offset; 272 } 273 274 static int __tp_field__init_ptr(struct tp_field *field, int offset) 275 { 276 field->offset = offset; 277 field->pointer = tp_field__ptr; 278 return 0; 279 } 280 281 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 282 { 283 return __tp_field__init_ptr(field, format_field->offset); 284 } 285 286 struct syscall_tp { 287 struct tp_field id; 288 union { 289 struct tp_field args, ret; 290 }; 291 }; 292 293 /* 294 * The evsel->priv as used by 'perf trace' 295 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME 296 * fmt: for all the other tracepoints 297 */ 298 struct evsel_trace { 299 struct syscall_tp sc; 300 struct syscall_arg_fmt *fmt; 301 }; 302 303 static struct evsel_trace *evsel_trace__new(void) 304 { 305 return zalloc(sizeof(struct evsel_trace)); 306 } 307 308 static void evsel_trace__delete(struct evsel_trace *et) 309 { 310 if (et == NULL) 311 return; 312 313 zfree(&et->fmt); 314 free(et); 315 } 316 317 /* 318 * Used with raw_syscalls:sys_{enter,exit} and with the 319 * syscalls:sys_{enter,exit}_SYSCALL tracepoints 320 */ 321 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) 322 { 323 struct evsel_trace *et = evsel->priv; 324 325 return &et->sc; 326 } 327 328 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) 329 { 330 if (evsel->priv == NULL) { 331 evsel->priv = evsel_trace__new(); 332 if (evsel->priv == NULL) 333 return NULL; 334 } 335 336 return __evsel__syscall_tp(evsel); 337 } 338 339 /* 340 * Used with all the other tracepoints. 341 */ 342 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) 343 { 344 struct evsel_trace *et = evsel->priv; 345 346 return et->fmt; 347 } 348 349 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) 350 { 351 struct evsel_trace *et = evsel->priv; 352 353 if (evsel->priv == NULL) { 354 et = evsel->priv = evsel_trace__new(); 355 356 if (et == NULL) 357 return NULL; 358 } 359 360 if (et->fmt == NULL) { 361 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); 362 if (et->fmt == NULL) 363 goto out_delete; 364 } 365 366 return __evsel__syscall_arg_fmt(evsel); 367 368 out_delete: 369 evsel_trace__delete(evsel->priv); 370 evsel->priv = NULL; 371 return NULL; 372 } 373 374 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) 375 { 376 struct tep_format_field *format_field = evsel__field(evsel, name); 377 378 if (format_field == NULL) 379 return -1; 380 381 return tp_field__init_uint(field, format_field, evsel->needs_swap); 382 } 383 384 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 385 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 386 evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 387 388 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) 389 { 390 struct tep_format_field *format_field = evsel__field(evsel, name); 391 392 if (format_field == NULL) 393 return -1; 394 395 return tp_field__init_ptr(field, format_field); 396 } 397 398 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 399 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 400 evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 401 402 static void evsel__delete_priv(struct evsel *evsel) 403 { 404 zfree(&evsel->priv); 405 evsel__delete(evsel); 406 } 407 408 static int evsel__init_syscall_tp(struct evsel *evsel) 409 { 410 struct syscall_tp *sc = evsel__syscall_tp(evsel); 411 412 if (sc != NULL) { 413 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 414 evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 415 return -ENOENT; 416 return 0; 417 } 418 419 return -ENOMEM; 420 } 421 422 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 423 { 424 struct syscall_tp *sc = evsel__syscall_tp(evsel); 425 426 if (sc != NULL) { 427 struct tep_format_field *syscall_id = evsel__field(tp, "id"); 428 if (syscall_id == NULL) 429 syscall_id = evsel__field(tp, "__syscall_nr"); 430 if (syscall_id == NULL || 431 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 432 return -EINVAL; 433 434 return 0; 435 } 436 437 return -ENOMEM; 438 } 439 440 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 441 { 442 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 443 444 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 445 } 446 447 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 448 { 449 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 450 451 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 452 } 453 454 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 455 { 456 if (evsel__syscall_tp(evsel) != NULL) { 457 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 458 return -ENOENT; 459 460 evsel->handler = handler; 461 return 0; 462 } 463 464 return -ENOMEM; 465 } 466 467 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 468 { 469 struct evsel *evsel = evsel__newtp("raw_syscalls", direction); 470 471 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 472 if (IS_ERR(evsel)) 473 evsel = evsel__newtp("syscalls", direction); 474 475 if (IS_ERR(evsel)) 476 return NULL; 477 478 if (evsel__init_raw_syscall_tp(evsel, handler)) 479 goto out_delete; 480 481 return evsel; 482 483 out_delete: 484 evsel__delete_priv(evsel); 485 return NULL; 486 } 487 488 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 489 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 490 fields->name.integer(&fields->name, sample); }) 491 492 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 493 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 494 fields->name.pointer(&fields->name, sample); }) 495 496 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) 497 { 498 int idx = val - sa->offset; 499 500 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 501 size_t printed = scnprintf(bf, size, intfmt, val); 502 if (show_suffix) 503 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 504 return printed; 505 } 506 507 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); 508 } 509 510 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 511 { 512 int idx = val - sa->offset; 513 514 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 515 size_t printed = scnprintf(bf, size, intfmt, val); 516 if (show_prefix) 517 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 518 return printed; 519 } 520 521 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 522 } 523 524 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 525 const char *intfmt, 526 struct syscall_arg *arg) 527 { 528 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 529 } 530 531 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 532 struct syscall_arg *arg) 533 { 534 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 535 } 536 537 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 538 539 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 540 { 541 return strarray__strtoul(arg->parm, bf, size, ret); 542 } 543 544 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 545 { 546 return strarray__strtoul_flags(arg->parm, bf, size, ret); 547 } 548 549 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 550 { 551 return strarrays__strtoul(arg->parm, bf, size, ret); 552 } 553 554 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 555 { 556 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 557 } 558 559 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 560 { 561 size_t printed; 562 int i; 563 564 for (i = 0; i < sas->nr_entries; ++i) { 565 struct strarray *sa = sas->entries[i]; 566 int idx = val - sa->offset; 567 568 if (idx >= 0 && idx < sa->nr_entries) { 569 if (sa->entries[idx] == NULL) 570 break; 571 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 572 } 573 } 574 575 printed = scnprintf(bf, size, intfmt, val); 576 if (show_prefix) 577 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 578 return printed; 579 } 580 581 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) 582 { 583 int i; 584 585 for (i = 0; i < sa->nr_entries; ++i) { 586 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { 587 *ret = sa->offset + i; 588 return true; 589 } 590 } 591 592 return false; 593 } 594 595 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) 596 { 597 u64 val = 0; 598 char *tok = bf, *sep, *end; 599 600 *ret = 0; 601 602 while (size != 0) { 603 int toklen = size; 604 605 sep = memchr(tok, '|', size); 606 if (sep != NULL) { 607 size -= sep - tok + 1; 608 609 end = sep - 1; 610 while (end > tok && isspace(*end)) 611 --end; 612 613 toklen = end - tok + 1; 614 } 615 616 while (isspace(*tok)) 617 ++tok; 618 619 if (isalpha(*tok) || *tok == '_') { 620 if (!strarray__strtoul(sa, tok, toklen, &val)) 621 return false; 622 } else 623 val = strtoul(tok, NULL, 0); 624 625 *ret |= (1 << (val - 1)); 626 627 if (sep == NULL) 628 break; 629 tok = sep + 1; 630 } 631 632 return true; 633 } 634 635 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) 636 { 637 int i; 638 639 for (i = 0; i < sas->nr_entries; ++i) { 640 struct strarray *sa = sas->entries[i]; 641 642 if (strarray__strtoul(sa, bf, size, ret)) 643 return true; 644 } 645 646 return false; 647 } 648 649 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 650 struct syscall_arg *arg) 651 { 652 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 653 } 654 655 #ifndef AT_FDCWD 656 #define AT_FDCWD -100 657 #endif 658 659 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 660 struct syscall_arg *arg) 661 { 662 int fd = arg->val; 663 const char *prefix = "AT_FD"; 664 665 if (fd == AT_FDCWD) 666 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 667 668 return syscall_arg__scnprintf_fd(bf, size, arg); 669 } 670 671 #define SCA_FDAT syscall_arg__scnprintf_fd_at 672 673 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 674 struct syscall_arg *arg); 675 676 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 677 678 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 679 { 680 return scnprintf(bf, size, "%#lx", arg->val); 681 } 682 683 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 684 { 685 if (arg->val == 0) 686 return scnprintf(bf, size, "NULL"); 687 return syscall_arg__scnprintf_hex(bf, size, arg); 688 } 689 690 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 691 { 692 return scnprintf(bf, size, "%d", arg->val); 693 } 694 695 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 696 { 697 return scnprintf(bf, size, "%ld", arg->val); 698 } 699 700 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) 701 { 702 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can 703 // fill missing comms using thread__set_comm()... 704 // here or in a special syscall_arg__scnprintf_pid_sched_tp... 705 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); 706 } 707 708 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array 709 710 static const char *bpf_cmd[] = { 711 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 712 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", 713 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", 714 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", 715 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", 716 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", 717 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", 718 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", 719 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", 720 "LINK_DETACH", "PROG_BIND_MAP", 721 }; 722 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 723 724 static const char *fsmount_flags[] = { 725 [1] = "CLOEXEC", 726 }; 727 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 728 729 #include "trace/beauty/generated/fsconfig_arrays.c" 730 731 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 732 733 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 734 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 735 736 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 737 static DEFINE_STRARRAY(itimers, "ITIMER_"); 738 739 static const char *keyctl_options[] = { 740 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 741 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 742 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 743 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 744 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 745 }; 746 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 747 748 static const char *whences[] = { "SET", "CUR", "END", 749 #ifdef SEEK_DATA 750 "DATA", 751 #endif 752 #ifdef SEEK_HOLE 753 "HOLE", 754 #endif 755 }; 756 static DEFINE_STRARRAY(whences, "SEEK_"); 757 758 static const char *fcntl_cmds[] = { 759 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 760 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 761 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 762 "GETOWNER_UIDS", 763 }; 764 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 765 766 static const char *fcntl_linux_specific_cmds[] = { 767 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 768 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 769 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 770 }; 771 772 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 773 774 static struct strarray *fcntl_cmds_arrays[] = { 775 &strarray__fcntl_cmds, 776 &strarray__fcntl_linux_specific_cmds, 777 }; 778 779 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 780 781 static const char *rlimit_resources[] = { 782 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 783 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 784 "RTTIME", 785 }; 786 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 787 788 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 789 static DEFINE_STRARRAY(sighow, "SIG_"); 790 791 static const char *clockid[] = { 792 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 793 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 794 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 795 }; 796 static DEFINE_STRARRAY(clockid, "CLOCK_"); 797 798 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 799 struct syscall_arg *arg) 800 { 801 bool show_prefix = arg->show_string_prefix; 802 const char *suffix = "_OK"; 803 size_t printed = 0; 804 int mode = arg->val; 805 806 if (mode == F_OK) /* 0 */ 807 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 808 #define P_MODE(n) \ 809 if (mode & n##_OK) { \ 810 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 811 mode &= ~n##_OK; \ 812 } 813 814 P_MODE(R); 815 P_MODE(W); 816 P_MODE(X); 817 #undef P_MODE 818 819 if (mode) 820 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 821 822 return printed; 823 } 824 825 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 826 827 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 828 struct syscall_arg *arg); 829 830 #define SCA_FILENAME syscall_arg__scnprintf_filename 831 832 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 833 struct syscall_arg *arg) 834 { 835 bool show_prefix = arg->show_string_prefix; 836 const char *prefix = "O_"; 837 int printed = 0, flags = arg->val; 838 839 #define P_FLAG(n) \ 840 if (flags & O_##n) { \ 841 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 842 flags &= ~O_##n; \ 843 } 844 845 P_FLAG(CLOEXEC); 846 P_FLAG(NONBLOCK); 847 #undef P_FLAG 848 849 if (flags) 850 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 851 852 return printed; 853 } 854 855 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 856 857 #ifndef GRND_NONBLOCK 858 #define GRND_NONBLOCK 0x0001 859 #endif 860 #ifndef GRND_RANDOM 861 #define GRND_RANDOM 0x0002 862 #endif 863 864 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 865 struct syscall_arg *arg) 866 { 867 bool show_prefix = arg->show_string_prefix; 868 const char *prefix = "GRND_"; 869 int printed = 0, flags = arg->val; 870 871 #define P_FLAG(n) \ 872 if (flags & GRND_##n) { \ 873 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 874 flags &= ~GRND_##n; \ 875 } 876 877 P_FLAG(RANDOM); 878 P_FLAG(NONBLOCK); 879 #undef P_FLAG 880 881 if (flags) 882 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 883 884 return printed; 885 } 886 887 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 888 889 #define STRARRAY(name, array) \ 890 { .scnprintf = SCA_STRARRAY, \ 891 .strtoul = STUL_STRARRAY, \ 892 .parm = &strarray__##array, } 893 894 #define STRARRAY_FLAGS(name, array) \ 895 { .scnprintf = SCA_STRARRAY_FLAGS, \ 896 .strtoul = STUL_STRARRAY_FLAGS, \ 897 .parm = &strarray__##array, } 898 899 #include "trace/beauty/arch_errno_names.c" 900 #include "trace/beauty/eventfd.c" 901 #include "trace/beauty/futex_op.c" 902 #include "trace/beauty/futex_val3.c" 903 #include "trace/beauty/mmap.c" 904 #include "trace/beauty/mode_t.c" 905 #include "trace/beauty/msg_flags.c" 906 #include "trace/beauty/open_flags.c" 907 #include "trace/beauty/perf_event_open.c" 908 #include "trace/beauty/pid.c" 909 #include "trace/beauty/sched_policy.c" 910 #include "trace/beauty/seccomp.c" 911 #include "trace/beauty/signum.c" 912 #include "trace/beauty/socket_type.c" 913 #include "trace/beauty/waitid_options.c" 914 915 static struct syscall_fmt syscall_fmts[] = { 916 { .name = "access", 917 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 918 { .name = "arch_prctl", 919 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 920 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 921 { .name = "bind", 922 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 923 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 924 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 925 { .name = "bpf", 926 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 927 { .name = "brk", .hexret = true, 928 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 929 { .name = "clock_gettime", 930 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 931 { .name = "clock_nanosleep", 932 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, }, 933 { .name = "clone", .errpid = true, .nr_args = 5, 934 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 935 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 936 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 937 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 938 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 939 { .name = "close", 940 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 941 { .name = "connect", 942 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 943 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 944 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 945 { .name = "epoll_ctl", 946 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 947 { .name = "eventfd2", 948 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 949 { .name = "fchmodat", 950 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 951 { .name = "fchownat", 952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 953 { .name = "fcntl", 954 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 955 .strtoul = STUL_STRARRAYS, 956 .parm = &strarrays__fcntl_cmds_arrays, 957 .show_zero = true, }, 958 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 959 { .name = "flock", 960 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 961 { .name = "fsconfig", 962 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 963 { .name = "fsmount", 964 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 965 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 966 { .name = "fspick", 967 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 968 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 969 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 970 { .name = "fstat", .alias = "newfstat", }, 971 { .name = "fstatat", .alias = "newfstatat", }, 972 { .name = "futex", 973 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 974 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 975 { .name = "futimesat", 976 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 977 { .name = "getitimer", 978 .arg = { [0] = STRARRAY(which, itimers), }, }, 979 { .name = "getpid", .errpid = true, }, 980 { .name = "getpgid", .errpid = true, }, 981 { .name = "getppid", .errpid = true, }, 982 { .name = "getrandom", 983 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 984 { .name = "getrlimit", 985 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 986 { .name = "getsockopt", 987 .arg = { [1] = STRARRAY(level, socket_level), }, }, 988 { .name = "gettid", .errpid = true, }, 989 { .name = "ioctl", 990 .arg = { 991 #if defined(__i386__) || defined(__x86_64__) 992 /* 993 * FIXME: Make this available to all arches. 994 */ 995 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 996 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 997 #else 998 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 999 #endif 1000 { .name = "kcmp", .nr_args = 5, 1001 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 1002 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1003 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1004 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1005 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1006 { .name = "keyctl", 1007 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1008 { .name = "kill", 1009 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1010 { .name = "linkat", 1011 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1012 { .name = "lseek", 1013 .arg = { [2] = STRARRAY(whence, whences), }, }, 1014 { .name = "lstat", .alias = "newlstat", }, 1015 { .name = "madvise", 1016 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1017 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1018 { .name = "mkdirat", 1019 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1020 { .name = "mknodat", 1021 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1022 { .name = "mmap", .hexret = true, 1023 /* The standard mmap maps to old_mmap on s390x */ 1024 #if defined(__s390x__) 1025 .alias = "old_mmap", 1026 #endif 1027 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1028 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1029 .strtoul = STUL_STRARRAY_FLAGS, 1030 .parm = &strarray__mmap_flags, }, 1031 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1032 { .name = "mount", 1033 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1034 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1035 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1036 { .name = "move_mount", 1037 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1038 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1039 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1040 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1041 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1042 { .name = "mprotect", 1043 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1044 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 1045 { .name = "mq_unlink", 1046 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1047 { .name = "mremap", .hexret = true, 1048 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1049 { .name = "name_to_handle_at", 1050 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1051 { .name = "newfstatat", 1052 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1053 { .name = "open", 1054 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1055 { .name = "open_by_handle_at", 1056 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1057 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1058 { .name = "openat", 1059 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1060 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1061 { .name = "perf_event_open", 1062 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ }, 1063 [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1064 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1065 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1066 { .name = "pipe2", 1067 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1068 { .name = "pkey_alloc", 1069 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1070 { .name = "pkey_free", 1071 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1072 { .name = "pkey_mprotect", 1073 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1074 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1075 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1076 { .name = "poll", .timeout = true, }, 1077 { .name = "ppoll", .timeout = true, }, 1078 { .name = "prctl", 1079 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1080 .strtoul = STUL_STRARRAY, 1081 .parm = &strarray__prctl_options, }, 1082 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1083 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1084 { .name = "pread", .alias = "pread64", }, 1085 { .name = "preadv", .alias = "pread", }, 1086 { .name = "prlimit64", 1087 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1088 { .name = "pwrite", .alias = "pwrite64", }, 1089 { .name = "readlinkat", 1090 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1091 { .name = "recvfrom", 1092 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1093 { .name = "recvmmsg", 1094 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1095 { .name = "recvmsg", 1096 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1097 { .name = "renameat", 1098 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1099 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1100 { .name = "renameat2", 1101 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1102 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1103 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1104 { .name = "rt_sigaction", 1105 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1106 { .name = "rt_sigprocmask", 1107 .arg = { [0] = STRARRAY(how, sighow), }, }, 1108 { .name = "rt_sigqueueinfo", 1109 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1110 { .name = "rt_tgsigqueueinfo", 1111 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1112 { .name = "sched_setscheduler", 1113 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1114 { .name = "seccomp", 1115 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1116 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1117 { .name = "select", .timeout = true, }, 1118 { .name = "sendfile", .alias = "sendfile64", }, 1119 { .name = "sendmmsg", 1120 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1121 { .name = "sendmsg", 1122 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1123 { .name = "sendto", 1124 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1125 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1126 { .name = "set_tid_address", .errpid = true, }, 1127 { .name = "setitimer", 1128 .arg = { [0] = STRARRAY(which, itimers), }, }, 1129 { .name = "setrlimit", 1130 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1131 { .name = "setsockopt", 1132 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1133 { .name = "socket", 1134 .arg = { [0] = STRARRAY(family, socket_families), 1135 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1136 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1137 { .name = "socketpair", 1138 .arg = { [0] = STRARRAY(family, socket_families), 1139 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1140 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1141 { .name = "stat", .alias = "newstat", }, 1142 { .name = "statx", 1143 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1144 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 1145 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1146 { .name = "swapoff", 1147 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1148 { .name = "swapon", 1149 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1150 { .name = "symlinkat", 1151 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1152 { .name = "sync_file_range", 1153 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1154 { .name = "tgkill", 1155 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1156 { .name = "tkill", 1157 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1158 { .name = "umount2", .alias = "umount", 1159 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1160 { .name = "uname", .alias = "newuname", }, 1161 { .name = "unlinkat", 1162 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1163 { .name = "utimensat", 1164 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1165 { .name = "wait4", .errpid = true, 1166 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1167 { .name = "waitid", .errpid = true, 1168 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1169 }; 1170 1171 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1172 { 1173 const struct syscall_fmt *fmt = fmtp; 1174 return strcmp(name, fmt->name); 1175 } 1176 1177 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name) 1178 { 1179 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1180 } 1181 1182 static struct syscall_fmt *syscall_fmt__find(const char *name) 1183 { 1184 const int nmemb = ARRAY_SIZE(syscall_fmts); 1185 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1186 } 1187 1188 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias) 1189 { 1190 int i; 1191 1192 for (i = 0; i < nmemb; ++i) { 1193 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1194 return &fmts[i]; 1195 } 1196 1197 return NULL; 1198 } 1199 1200 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1201 { 1202 const int nmemb = ARRAY_SIZE(syscall_fmts); 1203 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1204 } 1205 1206 /* 1207 * is_exit: is this "exit" or "exit_group"? 1208 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1209 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1210 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1211 */ 1212 struct syscall { 1213 struct tep_event *tp_format; 1214 int nr_args; 1215 int args_size; 1216 struct { 1217 struct bpf_program *sys_enter, 1218 *sys_exit; 1219 } bpf_prog; 1220 bool is_exit; 1221 bool is_open; 1222 bool nonexistent; 1223 struct tep_format_field *args; 1224 const char *name; 1225 struct syscall_fmt *fmt; 1226 struct syscall_arg_fmt *arg_fmt; 1227 }; 1228 1229 /* 1230 * We need to have this 'calculated' boolean because in some cases we really 1231 * don't know what is the duration of a syscall, for instance, when we start 1232 * a session and some threads are waiting for a syscall to finish, say 'poll', 1233 * in which case all we can do is to print "( ? ) for duration and for the 1234 * start timestamp. 1235 */ 1236 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1237 { 1238 double duration = (double)t / NSEC_PER_MSEC; 1239 size_t printed = fprintf(fp, "("); 1240 1241 if (!calculated) 1242 printed += fprintf(fp, " "); 1243 else if (duration >= 1.0) 1244 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1245 else if (duration >= 0.01) 1246 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1247 else 1248 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1249 return printed + fprintf(fp, "): "); 1250 } 1251 1252 /** 1253 * filename.ptr: The filename char pointer that will be vfs_getname'd 1254 * filename.entry_str_pos: Where to insert the string translated from 1255 * filename.ptr by the vfs_getname tracepoint/kprobe. 1256 * ret_scnprintf: syscall args may set this to a different syscall return 1257 * formatter, for instance, fcntl may return fds, file flags, etc. 1258 */ 1259 struct thread_trace { 1260 u64 entry_time; 1261 bool entry_pending; 1262 unsigned long nr_events; 1263 unsigned long pfmaj, pfmin; 1264 char *entry_str; 1265 double runtime_ms; 1266 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1267 struct { 1268 unsigned long ptr; 1269 short int entry_str_pos; 1270 bool pending_open; 1271 unsigned int namelen; 1272 char *name; 1273 } filename; 1274 struct { 1275 int max; 1276 struct file *table; 1277 } files; 1278 1279 struct intlist *syscall_stats; 1280 }; 1281 1282 static struct thread_trace *thread_trace__new(void) 1283 { 1284 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1285 1286 if (ttrace) { 1287 ttrace->files.max = -1; 1288 ttrace->syscall_stats = intlist__new(NULL); 1289 } 1290 1291 return ttrace; 1292 } 1293 1294 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1295 { 1296 struct thread_trace *ttrace; 1297 1298 if (thread == NULL) 1299 goto fail; 1300 1301 if (thread__priv(thread) == NULL) 1302 thread__set_priv(thread, thread_trace__new()); 1303 1304 if (thread__priv(thread) == NULL) 1305 goto fail; 1306 1307 ttrace = thread__priv(thread); 1308 ++ttrace->nr_events; 1309 1310 return ttrace; 1311 fail: 1312 color_fprintf(fp, PERF_COLOR_RED, 1313 "WARNING: not enough memory, dropping samples!\n"); 1314 return NULL; 1315 } 1316 1317 1318 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1319 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1320 { 1321 struct thread_trace *ttrace = thread__priv(arg->thread); 1322 1323 ttrace->ret_scnprintf = ret_scnprintf; 1324 } 1325 1326 #define TRACE_PFMAJ (1 << 0) 1327 #define TRACE_PFMIN (1 << 1) 1328 1329 static const size_t trace__entry_str_size = 2048; 1330 1331 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1332 { 1333 if (fd < 0) 1334 return NULL; 1335 1336 if (fd > ttrace->files.max) { 1337 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1338 1339 if (nfiles == NULL) 1340 return NULL; 1341 1342 if (ttrace->files.max != -1) { 1343 memset(nfiles + ttrace->files.max + 1, 0, 1344 (fd - ttrace->files.max) * sizeof(struct file)); 1345 } else { 1346 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1347 } 1348 1349 ttrace->files.table = nfiles; 1350 ttrace->files.max = fd; 1351 } 1352 1353 return ttrace->files.table + fd; 1354 } 1355 1356 struct file *thread__files_entry(struct thread *thread, int fd) 1357 { 1358 return thread_trace__files_entry(thread__priv(thread), fd); 1359 } 1360 1361 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1362 { 1363 struct thread_trace *ttrace = thread__priv(thread); 1364 struct file *file = thread_trace__files_entry(ttrace, fd); 1365 1366 if (file != NULL) { 1367 struct stat st; 1368 if (stat(pathname, &st) == 0) 1369 file->dev_maj = major(st.st_rdev); 1370 file->pathname = strdup(pathname); 1371 if (file->pathname) 1372 return 0; 1373 } 1374 1375 return -1; 1376 } 1377 1378 static int thread__read_fd_path(struct thread *thread, int fd) 1379 { 1380 char linkname[PATH_MAX], pathname[PATH_MAX]; 1381 struct stat st; 1382 int ret; 1383 1384 if (thread->pid_ == thread->tid) { 1385 scnprintf(linkname, sizeof(linkname), 1386 "/proc/%d/fd/%d", thread->pid_, fd); 1387 } else { 1388 scnprintf(linkname, sizeof(linkname), 1389 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1390 } 1391 1392 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1393 return -1; 1394 1395 ret = readlink(linkname, pathname, sizeof(pathname)); 1396 1397 if (ret < 0 || ret > st.st_size) 1398 return -1; 1399 1400 pathname[ret] = '\0'; 1401 return trace__set_fd_pathname(thread, fd, pathname); 1402 } 1403 1404 static const char *thread__fd_path(struct thread *thread, int fd, 1405 struct trace *trace) 1406 { 1407 struct thread_trace *ttrace = thread__priv(thread); 1408 1409 if (ttrace == NULL || trace->fd_path_disabled) 1410 return NULL; 1411 1412 if (fd < 0) 1413 return NULL; 1414 1415 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1416 if (!trace->live) 1417 return NULL; 1418 ++trace->stats.proc_getname; 1419 if (thread__read_fd_path(thread, fd)) 1420 return NULL; 1421 } 1422 1423 return ttrace->files.table[fd].pathname; 1424 } 1425 1426 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1427 { 1428 int fd = arg->val; 1429 size_t printed = scnprintf(bf, size, "%d", fd); 1430 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1431 1432 if (path) 1433 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1434 1435 return printed; 1436 } 1437 1438 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1439 { 1440 size_t printed = scnprintf(bf, size, "%d", fd); 1441 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1442 1443 if (thread) { 1444 const char *path = thread__fd_path(thread, fd, trace); 1445 1446 if (path) 1447 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1448 1449 thread__put(thread); 1450 } 1451 1452 return printed; 1453 } 1454 1455 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1456 struct syscall_arg *arg) 1457 { 1458 int fd = arg->val; 1459 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1460 struct thread_trace *ttrace = thread__priv(arg->thread); 1461 1462 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1463 zfree(&ttrace->files.table[fd].pathname); 1464 1465 return printed; 1466 } 1467 1468 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1469 unsigned long ptr) 1470 { 1471 struct thread_trace *ttrace = thread__priv(thread); 1472 1473 ttrace->filename.ptr = ptr; 1474 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1475 } 1476 1477 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1478 { 1479 struct augmented_arg *augmented_arg = arg->augmented.args; 1480 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1481 /* 1482 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1483 * we would have two strings, each prefixed by its size. 1484 */ 1485 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1486 1487 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1488 arg->augmented.size -= consumed; 1489 1490 return printed; 1491 } 1492 1493 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1494 struct syscall_arg *arg) 1495 { 1496 unsigned long ptr = arg->val; 1497 1498 if (arg->augmented.args) 1499 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1500 1501 if (!arg->trace->vfs_getname) 1502 return scnprintf(bf, size, "%#x", ptr); 1503 1504 thread__set_filename_pos(arg->thread, bf, ptr); 1505 return 0; 1506 } 1507 1508 static bool trace__filter_duration(struct trace *trace, double t) 1509 { 1510 return t < (trace->duration_filter * NSEC_PER_MSEC); 1511 } 1512 1513 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1514 { 1515 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1516 1517 return fprintf(fp, "%10.3f ", ts); 1518 } 1519 1520 /* 1521 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1522 * using ttrace->entry_time for a thread that receives a sys_exit without 1523 * first having received a sys_enter ("poll" issued before tracing session 1524 * starts, lost sys_enter exit due to ring buffer overflow). 1525 */ 1526 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1527 { 1528 if (tstamp > 0) 1529 return __trace__fprintf_tstamp(trace, tstamp, fp); 1530 1531 return fprintf(fp, " ? "); 1532 } 1533 1534 static pid_t workload_pid = -1; 1535 static volatile sig_atomic_t done = false; 1536 static volatile sig_atomic_t interrupted = false; 1537 1538 static void sighandler_interrupt(int sig __maybe_unused) 1539 { 1540 done = interrupted = true; 1541 } 1542 1543 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1544 void *context __maybe_unused) 1545 { 1546 if (info->si_pid == workload_pid) 1547 done = true; 1548 } 1549 1550 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1551 { 1552 size_t printed = 0; 1553 1554 if (trace->multiple_threads) { 1555 if (trace->show_comm) 1556 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1557 printed += fprintf(fp, "%d ", thread->tid); 1558 } 1559 1560 return printed; 1561 } 1562 1563 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1564 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1565 { 1566 size_t printed = 0; 1567 1568 if (trace->show_tstamp) 1569 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1570 if (trace->show_duration) 1571 printed += fprintf_duration(duration, duration_calculated, fp); 1572 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1573 } 1574 1575 static int trace__process_event(struct trace *trace, struct machine *machine, 1576 union perf_event *event, struct perf_sample *sample) 1577 { 1578 int ret = 0; 1579 1580 switch (event->header.type) { 1581 case PERF_RECORD_LOST: 1582 color_fprintf(trace->output, PERF_COLOR_RED, 1583 "LOST %" PRIu64 " events!\n", event->lost.lost); 1584 ret = machine__process_lost_event(machine, event, sample); 1585 break; 1586 default: 1587 ret = machine__process_event(machine, event, sample); 1588 break; 1589 } 1590 1591 return ret; 1592 } 1593 1594 static int trace__tool_process(struct perf_tool *tool, 1595 union perf_event *event, 1596 struct perf_sample *sample, 1597 struct machine *machine) 1598 { 1599 struct trace *trace = container_of(tool, struct trace, tool); 1600 return trace__process_event(trace, machine, event, sample); 1601 } 1602 1603 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1604 { 1605 struct machine *machine = vmachine; 1606 1607 if (machine->kptr_restrict_warned) 1608 return NULL; 1609 1610 if (symbol_conf.kptr_restrict) { 1611 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1612 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1613 "Kernel samples will not be resolved.\n"); 1614 machine->kptr_restrict_warned = true; 1615 return NULL; 1616 } 1617 1618 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1619 } 1620 1621 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1622 { 1623 int err = symbol__init(NULL); 1624 1625 if (err) 1626 return err; 1627 1628 trace->host = machine__new_host(); 1629 if (trace->host == NULL) 1630 return -ENOMEM; 1631 1632 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1633 if (err < 0) 1634 goto out; 1635 1636 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1637 evlist->core.threads, trace__tool_process, 1638 true, false, 1); 1639 out: 1640 if (err) 1641 symbol__exit(); 1642 1643 return err; 1644 } 1645 1646 static void trace__symbols__exit(struct trace *trace) 1647 { 1648 machine__exit(trace->host); 1649 trace->host = NULL; 1650 1651 symbol__exit(); 1652 } 1653 1654 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1655 { 1656 int idx; 1657 1658 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) 1659 nr_args = sc->fmt->nr_args; 1660 1661 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1662 if (sc->arg_fmt == NULL) 1663 return -1; 1664 1665 for (idx = 0; idx < nr_args; ++idx) { 1666 if (sc->fmt) 1667 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1668 } 1669 1670 sc->nr_args = nr_args; 1671 return 0; 1672 } 1673 1674 static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1675 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1676 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1677 }; 1678 1679 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1680 { 1681 const struct syscall_arg_fmt *fmt = fmtp; 1682 return strcmp(name, fmt->name); 1683 } 1684 1685 static struct syscall_arg_fmt * 1686 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name) 1687 { 1688 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1689 } 1690 1691 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1692 { 1693 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1694 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1695 } 1696 1697 static struct tep_format_field * 1698 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1699 { 1700 struct tep_format_field *last_field = NULL; 1701 int len; 1702 1703 for (; field; field = field->next, ++arg) { 1704 last_field = field; 1705 1706 if (arg->scnprintf) 1707 continue; 1708 1709 len = strlen(field->name); 1710 1711 if (strcmp(field->type, "const char *") == 0 && 1712 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1713 strstr(field->name, "path") != NULL)) 1714 arg->scnprintf = SCA_FILENAME; 1715 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1716 arg->scnprintf = SCA_PTR; 1717 else if (strcmp(field->type, "pid_t") == 0) 1718 arg->scnprintf = SCA_PID; 1719 else if (strcmp(field->type, "umode_t") == 0) 1720 arg->scnprintf = SCA_MODE_T; 1721 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1722 arg->scnprintf = SCA_CHAR_ARRAY; 1723 arg->nr_entries = field->arraylen; 1724 } else if ((strcmp(field->type, "int") == 0 || 1725 strcmp(field->type, "unsigned int") == 0 || 1726 strcmp(field->type, "long") == 0) && 1727 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1728 /* 1729 * /sys/kernel/tracing/events/syscalls/sys_enter* 1730 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1731 * 65 int 1732 * 23 unsigned int 1733 * 7 unsigned long 1734 */ 1735 arg->scnprintf = SCA_FD; 1736 } else { 1737 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); 1738 1739 if (fmt) { 1740 arg->scnprintf = fmt->scnprintf; 1741 arg->strtoul = fmt->strtoul; 1742 } 1743 } 1744 } 1745 1746 return last_field; 1747 } 1748 1749 static int syscall__set_arg_fmts(struct syscall *sc) 1750 { 1751 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1752 1753 if (last_field) 1754 sc->args_size = last_field->offset + last_field->size; 1755 1756 return 0; 1757 } 1758 1759 static int trace__read_syscall_info(struct trace *trace, int id) 1760 { 1761 char tp_name[128]; 1762 struct syscall *sc; 1763 const char *name = syscalltbl__name(trace->sctbl, id); 1764 1765 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1766 if (trace->syscalls.table == NULL) { 1767 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1768 if (trace->syscalls.table == NULL) 1769 return -ENOMEM; 1770 } 1771 #else 1772 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1773 // When using libaudit we don't know beforehand what is the max syscall id 1774 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1775 1776 if (table == NULL) 1777 return -ENOMEM; 1778 1779 // Need to memset from offset 0 and +1 members if brand new 1780 if (trace->syscalls.table == NULL) 1781 memset(table, 0, (id + 1) * sizeof(*sc)); 1782 else 1783 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1784 1785 trace->syscalls.table = table; 1786 trace->sctbl->syscalls.max_id = id; 1787 } 1788 #endif 1789 sc = trace->syscalls.table + id; 1790 if (sc->nonexistent) 1791 return -EEXIST; 1792 1793 if (name == NULL) { 1794 sc->nonexistent = true; 1795 return -EEXIST; 1796 } 1797 1798 sc->name = name; 1799 sc->fmt = syscall_fmt__find(sc->name); 1800 1801 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1802 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1803 1804 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1805 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1806 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1807 } 1808 1809 /* 1810 * Fails to read trace point format via sysfs node, so the trace point 1811 * doesn't exist. Set the 'nonexistent' flag as true. 1812 */ 1813 if (IS_ERR(sc->tp_format)) { 1814 sc->nonexistent = true; 1815 return PTR_ERR(sc->tp_format); 1816 } 1817 1818 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 1819 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) 1820 return -ENOMEM; 1821 1822 sc->args = sc->tp_format->format.fields; 1823 /* 1824 * We need to check and discard the first variable '__syscall_nr' 1825 * or 'nr' that mean the syscall number. It is needless here. 1826 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1827 */ 1828 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1829 sc->args = sc->args->next; 1830 --sc->nr_args; 1831 } 1832 1833 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1834 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1835 1836 return syscall__set_arg_fmts(sc); 1837 } 1838 1839 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1840 { 1841 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1842 1843 if (fmt != NULL) { 1844 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1845 return 0; 1846 } 1847 1848 return -ENOMEM; 1849 } 1850 1851 static int intcmp(const void *a, const void *b) 1852 { 1853 const int *one = a, *another = b; 1854 1855 return *one - *another; 1856 } 1857 1858 static int trace__validate_ev_qualifier(struct trace *trace) 1859 { 1860 int err = 0; 1861 bool printed_invalid_prefix = false; 1862 struct str_node *pos; 1863 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1864 1865 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1866 sizeof(trace->ev_qualifier_ids.entries[0])); 1867 1868 if (trace->ev_qualifier_ids.entries == NULL) { 1869 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1870 trace->output); 1871 err = -EINVAL; 1872 goto out; 1873 } 1874 1875 strlist__for_each_entry(pos, trace->ev_qualifier) { 1876 const char *sc = pos->s; 1877 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1878 1879 if (id < 0) { 1880 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1881 if (id >= 0) 1882 goto matches; 1883 1884 if (!printed_invalid_prefix) { 1885 pr_debug("Skipping unknown syscalls: "); 1886 printed_invalid_prefix = true; 1887 } else { 1888 pr_debug(", "); 1889 } 1890 1891 pr_debug("%s", sc); 1892 continue; 1893 } 1894 matches: 1895 trace->ev_qualifier_ids.entries[nr_used++] = id; 1896 if (match_next == -1) 1897 continue; 1898 1899 while (1) { 1900 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1901 if (id < 0) 1902 break; 1903 if (nr_allocated == nr_used) { 1904 void *entries; 1905 1906 nr_allocated += 8; 1907 entries = realloc(trace->ev_qualifier_ids.entries, 1908 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1909 if (entries == NULL) { 1910 err = -ENOMEM; 1911 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1912 goto out_free; 1913 } 1914 trace->ev_qualifier_ids.entries = entries; 1915 } 1916 trace->ev_qualifier_ids.entries[nr_used++] = id; 1917 } 1918 } 1919 1920 trace->ev_qualifier_ids.nr = nr_used; 1921 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1922 out: 1923 if (printed_invalid_prefix) 1924 pr_debug("\n"); 1925 return err; 1926 out_free: 1927 zfree(&trace->ev_qualifier_ids.entries); 1928 trace->ev_qualifier_ids.nr = 0; 1929 goto out; 1930 } 1931 1932 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1933 { 1934 bool in_ev_qualifier; 1935 1936 if (trace->ev_qualifier_ids.nr == 0) 1937 return true; 1938 1939 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1940 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1941 1942 if (in_ev_qualifier) 1943 return !trace->not_ev_qualifier; 1944 1945 return trace->not_ev_qualifier; 1946 } 1947 1948 /* 1949 * args is to be interpreted as a series of longs but we need to handle 1950 * 8-byte unaligned accesses. args points to raw_data within the event 1951 * and raw_data is guaranteed to be 8-byte unaligned because it is 1952 * preceded by raw_size which is a u32. So we need to copy args to a temp 1953 * variable to read it. Most notably this avoids extended load instructions 1954 * on unaligned addresses 1955 */ 1956 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1957 { 1958 unsigned long val; 1959 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1960 1961 memcpy(&val, p, sizeof(val)); 1962 return val; 1963 } 1964 1965 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1966 struct syscall_arg *arg) 1967 { 1968 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1969 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1970 1971 return scnprintf(bf, size, "arg%d: ", arg->idx); 1972 } 1973 1974 /* 1975 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1976 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1977 * in tools/perf/trace/beauty/mount_flags.c 1978 */ 1979 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 1980 { 1981 if (fmt && fmt->mask_val) 1982 return fmt->mask_val(arg, val); 1983 1984 return val; 1985 } 1986 1987 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 1988 struct syscall_arg *arg, unsigned long val) 1989 { 1990 if (fmt && fmt->scnprintf) { 1991 arg->val = val; 1992 if (fmt->parm) 1993 arg->parm = fmt->parm; 1994 return fmt->scnprintf(bf, size, arg); 1995 } 1996 return scnprintf(bf, size, "%ld", val); 1997 } 1998 1999 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 2000 unsigned char *args, void *augmented_args, int augmented_args_size, 2001 struct trace *trace, struct thread *thread) 2002 { 2003 size_t printed = 0; 2004 unsigned long val; 2005 u8 bit = 1; 2006 struct syscall_arg arg = { 2007 .args = args, 2008 .augmented = { 2009 .size = augmented_args_size, 2010 .args = augmented_args, 2011 }, 2012 .idx = 0, 2013 .mask = 0, 2014 .trace = trace, 2015 .thread = thread, 2016 .show_string_prefix = trace->show_string_prefix, 2017 }; 2018 struct thread_trace *ttrace = thread__priv(thread); 2019 2020 /* 2021 * Things like fcntl will set this in its 'cmd' formatter to pick the 2022 * right formatter for the return value (an fd? file flags?), which is 2023 * not needed for syscalls that always return a given type, say an fd. 2024 */ 2025 ttrace->ret_scnprintf = NULL; 2026 2027 if (sc->args != NULL) { 2028 struct tep_format_field *field; 2029 2030 for (field = sc->args; field; 2031 field = field->next, ++arg.idx, bit <<= 1) { 2032 if (arg.mask & bit) 2033 continue; 2034 2035 arg.fmt = &sc->arg_fmt[arg.idx]; 2036 val = syscall_arg__val(&arg, arg.idx); 2037 /* 2038 * Some syscall args need some mask, most don't and 2039 * return val untouched. 2040 */ 2041 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2042 2043 /* 2044 * Suppress this argument if its value is zero and 2045 * and we don't have a string associated in an 2046 * strarray for it. 2047 */ 2048 if (val == 0 && 2049 !trace->show_zeros && 2050 !(sc->arg_fmt && 2051 (sc->arg_fmt[arg.idx].show_zero || 2052 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 2053 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 2054 sc->arg_fmt[arg.idx].parm)) 2055 continue; 2056 2057 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2058 2059 if (trace->show_arg_names) 2060 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2061 2062 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2063 bf + printed, size - printed, &arg, val); 2064 } 2065 } else if (IS_ERR(sc->tp_format)) { 2066 /* 2067 * If we managed to read the tracepoint /format file, then we 2068 * may end up not having any args, like with gettid(), so only 2069 * print the raw args when we didn't manage to read it. 2070 */ 2071 while (arg.idx < sc->nr_args) { 2072 if (arg.mask & bit) 2073 goto next_arg; 2074 val = syscall_arg__val(&arg, arg.idx); 2075 if (printed) 2076 printed += scnprintf(bf + printed, size - printed, ", "); 2077 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2078 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2079 next_arg: 2080 ++arg.idx; 2081 bit <<= 1; 2082 } 2083 } 2084 2085 return printed; 2086 } 2087 2088 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2089 union perf_event *event, 2090 struct perf_sample *sample); 2091 2092 static struct syscall *trace__syscall_info(struct trace *trace, 2093 struct evsel *evsel, int id) 2094 { 2095 int err = 0; 2096 2097 if (id < 0) { 2098 2099 /* 2100 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2101 * before that, leaving at a higher verbosity level till that is 2102 * explained. Reproduced with plain ftrace with: 2103 * 2104 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2105 * grep "NR -1 " /t/trace_pipe 2106 * 2107 * After generating some load on the machine. 2108 */ 2109 if (verbose > 1) { 2110 static u64 n; 2111 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2112 id, evsel__name(evsel), ++n); 2113 } 2114 return NULL; 2115 } 2116 2117 err = -EINVAL; 2118 2119 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2120 if (id > trace->sctbl->syscalls.max_id) { 2121 #else 2122 if (id >= trace->sctbl->syscalls.max_id) { 2123 /* 2124 * With libaudit we don't know beforehand what is the max_id, 2125 * so we let trace__read_syscall_info() figure that out as we 2126 * go on reading syscalls. 2127 */ 2128 err = trace__read_syscall_info(trace, id); 2129 if (err) 2130 #endif 2131 goto out_cant_read; 2132 } 2133 2134 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2135 (err = trace__read_syscall_info(trace, id)) != 0) 2136 goto out_cant_read; 2137 2138 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) 2139 goto out_cant_read; 2140 2141 return &trace->syscalls.table[id]; 2142 2143 out_cant_read: 2144 if (verbose > 0) { 2145 char sbuf[STRERR_BUFSIZE]; 2146 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2147 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2148 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2149 fputs(" information\n", trace->output); 2150 } 2151 return NULL; 2152 } 2153 2154 struct syscall_stats { 2155 struct stats stats; 2156 u64 nr_failures; 2157 int max_errno; 2158 u32 *errnos; 2159 }; 2160 2161 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2162 int id, struct perf_sample *sample, long err, bool errno_summary) 2163 { 2164 struct int_node *inode; 2165 struct syscall_stats *stats; 2166 u64 duration = 0; 2167 2168 inode = intlist__findnew(ttrace->syscall_stats, id); 2169 if (inode == NULL) 2170 return; 2171 2172 stats = inode->priv; 2173 if (stats == NULL) { 2174 stats = zalloc(sizeof(*stats)); 2175 if (stats == NULL) 2176 return; 2177 2178 init_stats(&stats->stats); 2179 inode->priv = stats; 2180 } 2181 2182 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2183 duration = sample->time - ttrace->entry_time; 2184 2185 update_stats(&stats->stats, duration); 2186 2187 if (err < 0) { 2188 ++stats->nr_failures; 2189 2190 if (!errno_summary) 2191 return; 2192 2193 err = -err; 2194 if (err > stats->max_errno) { 2195 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2196 2197 if (new_errnos) { 2198 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2199 } else { 2200 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2201 thread__comm_str(thread), thread->pid_, thread->tid); 2202 return; 2203 } 2204 2205 stats->errnos = new_errnos; 2206 stats->max_errno = err; 2207 } 2208 2209 ++stats->errnos[err - 1]; 2210 } 2211 } 2212 2213 static int trace__printf_interrupted_entry(struct trace *trace) 2214 { 2215 struct thread_trace *ttrace; 2216 size_t printed; 2217 int len; 2218 2219 if (trace->failure_only || trace->current == NULL) 2220 return 0; 2221 2222 ttrace = thread__priv(trace->current); 2223 2224 if (!ttrace->entry_pending) 2225 return 0; 2226 2227 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2228 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2229 2230 if (len < trace->args_alignment - 4) 2231 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2232 2233 printed += fprintf(trace->output, " ...\n"); 2234 2235 ttrace->entry_pending = false; 2236 ++trace->nr_events_printed; 2237 2238 return printed; 2239 } 2240 2241 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2242 struct perf_sample *sample, struct thread *thread) 2243 { 2244 int printed = 0; 2245 2246 if (trace->print_sample) { 2247 double ts = (double)sample->time / NSEC_PER_MSEC; 2248 2249 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2250 evsel__name(evsel), ts, 2251 thread__comm_str(thread), 2252 sample->pid, sample->tid, sample->cpu); 2253 } 2254 2255 return printed; 2256 } 2257 2258 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2259 { 2260 void *augmented_args = NULL; 2261 /* 2262 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2263 * and there we get all 6 syscall args plus the tracepoint common fields 2264 * that gets calculated at the start and the syscall_nr (another long). 2265 * So we check if that is the case and if so don't look after the 2266 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2267 * which is fixed. 2268 * 2269 * We'll revisit this later to pass s->args_size to the BPF augmenter 2270 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2271 * copies only what we need for each syscall, like what happens when we 2272 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2273 * traffic to just what is needed for each syscall. 2274 */ 2275 int args_size = raw_augmented_args_size ?: sc->args_size; 2276 2277 *augmented_args_size = sample->raw_size - args_size; 2278 if (*augmented_args_size > 0) 2279 augmented_args = sample->raw_data + args_size; 2280 2281 return augmented_args; 2282 } 2283 2284 static void syscall__exit(struct syscall *sc) 2285 { 2286 if (!sc) 2287 return; 2288 2289 free(sc->arg_fmt); 2290 } 2291 2292 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2293 union perf_event *event __maybe_unused, 2294 struct perf_sample *sample) 2295 { 2296 char *msg; 2297 void *args; 2298 int printed = 0; 2299 struct thread *thread; 2300 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2301 int augmented_args_size = 0; 2302 void *augmented_args = NULL; 2303 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2304 struct thread_trace *ttrace; 2305 2306 if (sc == NULL) 2307 return -1; 2308 2309 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2310 ttrace = thread__trace(thread, trace->output); 2311 if (ttrace == NULL) 2312 goto out_put; 2313 2314 trace__fprintf_sample(trace, evsel, sample, thread); 2315 2316 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2317 2318 if (ttrace->entry_str == NULL) { 2319 ttrace->entry_str = malloc(trace__entry_str_size); 2320 if (!ttrace->entry_str) 2321 goto out_put; 2322 } 2323 2324 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2325 trace__printf_interrupted_entry(trace); 2326 /* 2327 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2328 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2329 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2330 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2331 * so when handling, say the openat syscall, we end up getting 6 args for the 2332 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2333 * thinking that the extra 2 u64 args are the augmented filename, so just check 2334 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2335 */ 2336 if (evsel != trace->syscalls.events.sys_enter) 2337 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2338 ttrace->entry_time = sample->time; 2339 msg = ttrace->entry_str; 2340 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2341 2342 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2343 args, augmented_args, augmented_args_size, trace, thread); 2344 2345 if (sc->is_exit) { 2346 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2347 int alignment = 0; 2348 2349 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2350 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2351 if (trace->args_alignment > printed) 2352 alignment = trace->args_alignment - printed; 2353 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2354 } 2355 } else { 2356 ttrace->entry_pending = true; 2357 /* See trace__vfs_getname & trace__sys_exit */ 2358 ttrace->filename.pending_open = false; 2359 } 2360 2361 if (trace->current != thread) { 2362 thread__put(trace->current); 2363 trace->current = thread__get(thread); 2364 } 2365 err = 0; 2366 out_put: 2367 thread__put(thread); 2368 return err; 2369 } 2370 2371 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2372 struct perf_sample *sample) 2373 { 2374 struct thread_trace *ttrace; 2375 struct thread *thread; 2376 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2377 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2378 char msg[1024]; 2379 void *args, *augmented_args = NULL; 2380 int augmented_args_size; 2381 2382 if (sc == NULL) 2383 return -1; 2384 2385 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2386 ttrace = thread__trace(thread, trace->output); 2387 /* 2388 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2389 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2390 */ 2391 if (ttrace == NULL) 2392 goto out_put; 2393 2394 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2395 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2396 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2397 fprintf(trace->output, "%s", msg); 2398 err = 0; 2399 out_put: 2400 thread__put(thread); 2401 return err; 2402 } 2403 2404 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2405 struct perf_sample *sample, 2406 struct callchain_cursor *cursor) 2407 { 2408 struct addr_location al; 2409 int max_stack = evsel->core.attr.sample_max_stack ? 2410 evsel->core.attr.sample_max_stack : 2411 trace->max_stack; 2412 int err; 2413 2414 if (machine__resolve(trace->host, &al, sample) < 0) 2415 return -1; 2416 2417 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2418 addr_location__put(&al); 2419 return err; 2420 } 2421 2422 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2423 { 2424 /* TODO: user-configurable print_opts */ 2425 const unsigned int print_opts = EVSEL__PRINT_SYM | 2426 EVSEL__PRINT_DSO | 2427 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2428 2429 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output); 2430 } 2431 2432 static const char *errno_to_name(struct evsel *evsel, int err) 2433 { 2434 struct perf_env *env = evsel__env(evsel); 2435 const char *arch_name = perf_env__arch(env); 2436 2437 return arch_syscalls__strerrno(arch_name, err); 2438 } 2439 2440 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2441 union perf_event *event __maybe_unused, 2442 struct perf_sample *sample) 2443 { 2444 long ret; 2445 u64 duration = 0; 2446 bool duration_calculated = false; 2447 struct thread *thread; 2448 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2449 int alignment = trace->args_alignment; 2450 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2451 struct thread_trace *ttrace; 2452 2453 if (sc == NULL) 2454 return -1; 2455 2456 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2457 ttrace = thread__trace(thread, trace->output); 2458 if (ttrace == NULL) 2459 goto out_put; 2460 2461 trace__fprintf_sample(trace, evsel, sample, thread); 2462 2463 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2464 2465 if (trace->summary) 2466 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2467 2468 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2469 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2470 ttrace->filename.pending_open = false; 2471 ++trace->stats.vfs_getname; 2472 } 2473 2474 if (ttrace->entry_time) { 2475 duration = sample->time - ttrace->entry_time; 2476 if (trace__filter_duration(trace, duration)) 2477 goto out; 2478 duration_calculated = true; 2479 } else if (trace->duration_filter) 2480 goto out; 2481 2482 if (sample->callchain) { 2483 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2484 if (callchain_ret == 0) { 2485 if (callchain_cursor.nr < trace->min_stack) 2486 goto out; 2487 callchain_ret = 1; 2488 } 2489 } 2490 2491 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2492 goto out; 2493 2494 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2495 2496 if (ttrace->entry_pending) { 2497 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2498 } else { 2499 printed += fprintf(trace->output, " ... ["); 2500 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2501 printed += 9; 2502 printed += fprintf(trace->output, "]: %s()", sc->name); 2503 } 2504 2505 printed++; /* the closing ')' */ 2506 2507 if (alignment > printed) 2508 alignment -= printed; 2509 else 2510 alignment = 0; 2511 2512 fprintf(trace->output, ")%*s= ", alignment, " "); 2513 2514 if (sc->fmt == NULL) { 2515 if (ret < 0) 2516 goto errno_print; 2517 signed_print: 2518 fprintf(trace->output, "%ld", ret); 2519 } else if (ret < 0) { 2520 errno_print: { 2521 char bf[STRERR_BUFSIZE]; 2522 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2523 *e = errno_to_name(evsel, -ret); 2524 2525 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2526 } 2527 } else if (ret == 0 && sc->fmt->timeout) 2528 fprintf(trace->output, "0 (Timeout)"); 2529 else if (ttrace->ret_scnprintf) { 2530 char bf[1024]; 2531 struct syscall_arg arg = { 2532 .val = ret, 2533 .thread = thread, 2534 .trace = trace, 2535 }; 2536 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2537 ttrace->ret_scnprintf = NULL; 2538 fprintf(trace->output, "%s", bf); 2539 } else if (sc->fmt->hexret) 2540 fprintf(trace->output, "%#lx", ret); 2541 else if (sc->fmt->errpid) { 2542 struct thread *child = machine__find_thread(trace->host, ret, ret); 2543 2544 if (child != NULL) { 2545 fprintf(trace->output, "%ld", ret); 2546 if (child->comm_set) 2547 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2548 thread__put(child); 2549 } 2550 } else 2551 goto signed_print; 2552 2553 fputc('\n', trace->output); 2554 2555 /* 2556 * We only consider an 'event' for the sake of --max-events a non-filtered 2557 * sys_enter + sys_exit and other tracepoint events. 2558 */ 2559 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2560 interrupted = true; 2561 2562 if (callchain_ret > 0) 2563 trace__fprintf_callchain(trace, sample); 2564 else if (callchain_ret < 0) 2565 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2566 out: 2567 ttrace->entry_pending = false; 2568 err = 0; 2569 out_put: 2570 thread__put(thread); 2571 return err; 2572 } 2573 2574 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2575 union perf_event *event __maybe_unused, 2576 struct perf_sample *sample) 2577 { 2578 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2579 struct thread_trace *ttrace; 2580 size_t filename_len, entry_str_len, to_move; 2581 ssize_t remaining_space; 2582 char *pos; 2583 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2584 2585 if (!thread) 2586 goto out; 2587 2588 ttrace = thread__priv(thread); 2589 if (!ttrace) 2590 goto out_put; 2591 2592 filename_len = strlen(filename); 2593 if (filename_len == 0) 2594 goto out_put; 2595 2596 if (ttrace->filename.namelen < filename_len) { 2597 char *f = realloc(ttrace->filename.name, filename_len + 1); 2598 2599 if (f == NULL) 2600 goto out_put; 2601 2602 ttrace->filename.namelen = filename_len; 2603 ttrace->filename.name = f; 2604 } 2605 2606 strcpy(ttrace->filename.name, filename); 2607 ttrace->filename.pending_open = true; 2608 2609 if (!ttrace->filename.ptr) 2610 goto out_put; 2611 2612 entry_str_len = strlen(ttrace->entry_str); 2613 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2614 if (remaining_space <= 0) 2615 goto out_put; 2616 2617 if (filename_len > (size_t)remaining_space) { 2618 filename += filename_len - remaining_space; 2619 filename_len = remaining_space; 2620 } 2621 2622 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2623 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2624 memmove(pos + filename_len, pos, to_move); 2625 memcpy(pos, filename, filename_len); 2626 2627 ttrace->filename.ptr = 0; 2628 ttrace->filename.entry_str_pos = 0; 2629 out_put: 2630 thread__put(thread); 2631 out: 2632 return 0; 2633 } 2634 2635 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2636 union perf_event *event __maybe_unused, 2637 struct perf_sample *sample) 2638 { 2639 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2640 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2641 struct thread *thread = machine__findnew_thread(trace->host, 2642 sample->pid, 2643 sample->tid); 2644 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2645 2646 if (ttrace == NULL) 2647 goto out_dump; 2648 2649 ttrace->runtime_ms += runtime_ms; 2650 trace->runtime_ms += runtime_ms; 2651 out_put: 2652 thread__put(thread); 2653 return 0; 2654 2655 out_dump: 2656 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2657 evsel->name, 2658 evsel__strval(evsel, sample, "comm"), 2659 (pid_t)evsel__intval(evsel, sample, "pid"), 2660 runtime, 2661 evsel__intval(evsel, sample, "vruntime")); 2662 goto out_put; 2663 } 2664 2665 static int bpf_output__printer(enum binary_printer_ops op, 2666 unsigned int val, void *extra __maybe_unused, FILE *fp) 2667 { 2668 unsigned char ch = (unsigned char)val; 2669 2670 switch (op) { 2671 case BINARY_PRINT_CHAR_DATA: 2672 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2673 case BINARY_PRINT_DATA_BEGIN: 2674 case BINARY_PRINT_LINE_BEGIN: 2675 case BINARY_PRINT_ADDR: 2676 case BINARY_PRINT_NUM_DATA: 2677 case BINARY_PRINT_NUM_PAD: 2678 case BINARY_PRINT_SEP: 2679 case BINARY_PRINT_CHAR_PAD: 2680 case BINARY_PRINT_LINE_END: 2681 case BINARY_PRINT_DATA_END: 2682 default: 2683 break; 2684 } 2685 2686 return 0; 2687 } 2688 2689 static void bpf_output__fprintf(struct trace *trace, 2690 struct perf_sample *sample) 2691 { 2692 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2693 bpf_output__printer, NULL, trace->output); 2694 ++trace->nr_events_printed; 2695 } 2696 2697 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2698 struct thread *thread, void *augmented_args, int augmented_args_size) 2699 { 2700 char bf[2048]; 2701 size_t size = sizeof(bf); 2702 struct tep_format_field *field = evsel->tp_format->format.fields; 2703 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2704 size_t printed = 0; 2705 unsigned long val; 2706 u8 bit = 1; 2707 struct syscall_arg syscall_arg = { 2708 .augmented = { 2709 .size = augmented_args_size, 2710 .args = augmented_args, 2711 }, 2712 .idx = 0, 2713 .mask = 0, 2714 .trace = trace, 2715 .thread = thread, 2716 .show_string_prefix = trace->show_string_prefix, 2717 }; 2718 2719 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2720 if (syscall_arg.mask & bit) 2721 continue; 2722 2723 syscall_arg.len = 0; 2724 syscall_arg.fmt = arg; 2725 if (field->flags & TEP_FIELD_IS_ARRAY) { 2726 int offset = field->offset; 2727 2728 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2729 offset = format_field__intval(field, sample, evsel->needs_swap); 2730 syscall_arg.len = offset >> 16; 2731 offset &= 0xffff; 2732 #ifdef HAVE_LIBTRACEEVENT_TEP_FIELD_IS_RELATIVE 2733 if (field->flags & TEP_FIELD_IS_RELATIVE) 2734 offset += field->offset + field->size; 2735 #endif 2736 } 2737 2738 val = (uintptr_t)(sample->raw_data + offset); 2739 } else 2740 val = format_field__intval(field, sample, evsel->needs_swap); 2741 /* 2742 * Some syscall args need some mask, most don't and 2743 * return val untouched. 2744 */ 2745 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2746 2747 /* 2748 * Suppress this argument if its value is zero and 2749 * we don't have a string associated in an 2750 * strarray for it. 2751 */ 2752 if (val == 0 && 2753 !trace->show_zeros && 2754 !((arg->show_zero || 2755 arg->scnprintf == SCA_STRARRAY || 2756 arg->scnprintf == SCA_STRARRAYS) && 2757 arg->parm)) 2758 continue; 2759 2760 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2761 2762 if (trace->show_arg_names) 2763 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2764 2765 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); 2766 } 2767 2768 return printed + fprintf(trace->output, "%s", bf); 2769 } 2770 2771 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2772 union perf_event *event __maybe_unused, 2773 struct perf_sample *sample) 2774 { 2775 struct thread *thread; 2776 int callchain_ret = 0; 2777 /* 2778 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2779 * this event's max_events having been hit and this is an entry coming 2780 * from the ring buffer that we should discard, since the max events 2781 * have already been considered/printed. 2782 */ 2783 if (evsel->disabled) 2784 return 0; 2785 2786 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2787 2788 if (sample->callchain) { 2789 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2790 if (callchain_ret == 0) { 2791 if (callchain_cursor.nr < trace->min_stack) 2792 goto out; 2793 callchain_ret = 1; 2794 } 2795 } 2796 2797 trace__printf_interrupted_entry(trace); 2798 trace__fprintf_tstamp(trace, sample->time, trace->output); 2799 2800 if (trace->trace_syscalls && trace->show_duration) 2801 fprintf(trace->output, "( ): "); 2802 2803 if (thread) 2804 trace__fprintf_comm_tid(trace, thread, trace->output); 2805 2806 if (evsel == trace->syscalls.events.augmented) { 2807 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2808 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2809 2810 if (sc) { 2811 fprintf(trace->output, "%s(", sc->name); 2812 trace__fprintf_sys_enter(trace, evsel, sample); 2813 fputc(')', trace->output); 2814 goto newline; 2815 } 2816 2817 /* 2818 * XXX: Not having the associated syscall info or not finding/adding 2819 * the thread should never happen, but if it does... 2820 * fall thru and print it as a bpf_output event. 2821 */ 2822 } 2823 2824 fprintf(trace->output, "%s(", evsel->name); 2825 2826 if (evsel__is_bpf_output(evsel)) { 2827 bpf_output__fprintf(trace, sample); 2828 } else if (evsel->tp_format) { 2829 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2830 trace__fprintf_sys_enter(trace, evsel, sample)) { 2831 if (trace->libtraceevent_print) { 2832 event_format__fprintf(evsel->tp_format, sample->cpu, 2833 sample->raw_data, sample->raw_size, 2834 trace->output); 2835 } else { 2836 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); 2837 } 2838 } 2839 } 2840 2841 newline: 2842 fprintf(trace->output, ")\n"); 2843 2844 if (callchain_ret > 0) 2845 trace__fprintf_callchain(trace, sample); 2846 else if (callchain_ret < 0) 2847 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2848 2849 ++trace->nr_events_printed; 2850 2851 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2852 evsel__disable(evsel); 2853 evsel__close(evsel); 2854 } 2855 out: 2856 thread__put(thread); 2857 return 0; 2858 } 2859 2860 static void print_location(FILE *f, struct perf_sample *sample, 2861 struct addr_location *al, 2862 bool print_dso, bool print_sym) 2863 { 2864 2865 if ((verbose > 0 || print_dso) && al->map) 2866 fprintf(f, "%s@", al->map->dso->long_name); 2867 2868 if ((verbose > 0 || print_sym) && al->sym) 2869 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2870 al->addr - al->sym->start); 2871 else if (al->map) 2872 fprintf(f, "0x%" PRIx64, al->addr); 2873 else 2874 fprintf(f, "0x%" PRIx64, sample->addr); 2875 } 2876 2877 static int trace__pgfault(struct trace *trace, 2878 struct evsel *evsel, 2879 union perf_event *event __maybe_unused, 2880 struct perf_sample *sample) 2881 { 2882 struct thread *thread; 2883 struct addr_location al; 2884 char map_type = 'd'; 2885 struct thread_trace *ttrace; 2886 int err = -1; 2887 int callchain_ret = 0; 2888 2889 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2890 2891 if (sample->callchain) { 2892 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2893 if (callchain_ret == 0) { 2894 if (callchain_cursor.nr < trace->min_stack) 2895 goto out_put; 2896 callchain_ret = 1; 2897 } 2898 } 2899 2900 ttrace = thread__trace(thread, trace->output); 2901 if (ttrace == NULL) 2902 goto out_put; 2903 2904 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2905 ttrace->pfmaj++; 2906 else 2907 ttrace->pfmin++; 2908 2909 if (trace->summary_only) 2910 goto out; 2911 2912 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2913 2914 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2915 2916 fprintf(trace->output, "%sfault [", 2917 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2918 "maj" : "min"); 2919 2920 print_location(trace->output, sample, &al, false, true); 2921 2922 fprintf(trace->output, "] => "); 2923 2924 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2925 2926 if (!al.map) { 2927 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2928 2929 if (al.map) 2930 map_type = 'x'; 2931 else 2932 map_type = '?'; 2933 } 2934 2935 print_location(trace->output, sample, &al, true, false); 2936 2937 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2938 2939 if (callchain_ret > 0) 2940 trace__fprintf_callchain(trace, sample); 2941 else if (callchain_ret < 0) 2942 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2943 2944 ++trace->nr_events_printed; 2945 out: 2946 err = 0; 2947 out_put: 2948 thread__put(thread); 2949 return err; 2950 } 2951 2952 static void trace__set_base_time(struct trace *trace, 2953 struct evsel *evsel, 2954 struct perf_sample *sample) 2955 { 2956 /* 2957 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2958 * and don't use sample->time unconditionally, we may end up having 2959 * some other event in the future without PERF_SAMPLE_TIME for good 2960 * reason, i.e. we may not be interested in its timestamps, just in 2961 * it taking place, picking some piece of information when it 2962 * appears in our event stream (vfs_getname comes to mind). 2963 */ 2964 if (trace->base_time == 0 && !trace->full_time && 2965 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 2966 trace->base_time = sample->time; 2967 } 2968 2969 static int trace__process_sample(struct perf_tool *tool, 2970 union perf_event *event, 2971 struct perf_sample *sample, 2972 struct evsel *evsel, 2973 struct machine *machine __maybe_unused) 2974 { 2975 struct trace *trace = container_of(tool, struct trace, tool); 2976 struct thread *thread; 2977 int err = 0; 2978 2979 tracepoint_handler handler = evsel->handler; 2980 2981 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2982 if (thread && thread__is_filtered(thread)) 2983 goto out; 2984 2985 trace__set_base_time(trace, evsel, sample); 2986 2987 if (handler) { 2988 ++trace->nr_events; 2989 handler(trace, evsel, event, sample); 2990 } 2991 out: 2992 thread__put(thread); 2993 return err; 2994 } 2995 2996 static int trace__record(struct trace *trace, int argc, const char **argv) 2997 { 2998 unsigned int rec_argc, i, j; 2999 const char **rec_argv; 3000 const char * const record_args[] = { 3001 "record", 3002 "-R", 3003 "-m", "1024", 3004 "-c", "1", 3005 }; 3006 pid_t pid = getpid(); 3007 char *filter = asprintf__tp_filter_pids(1, &pid); 3008 const char * const sc_args[] = { "-e", }; 3009 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 3010 const char * const majpf_args[] = { "-e", "major-faults" }; 3011 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 3012 const char * const minpf_args[] = { "-e", "minor-faults" }; 3013 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 3014 int err = -1; 3015 3016 /* +3 is for the event string below and the pid filter */ 3017 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + 3018 majpf_args_nr + minpf_args_nr + argc; 3019 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 3020 3021 if (rec_argv == NULL || filter == NULL) 3022 goto out_free; 3023 3024 j = 0; 3025 for (i = 0; i < ARRAY_SIZE(record_args); i++) 3026 rec_argv[j++] = record_args[i]; 3027 3028 if (trace->trace_syscalls) { 3029 for (i = 0; i < sc_args_nr; i++) 3030 rec_argv[j++] = sc_args[i]; 3031 3032 /* event string may be different for older kernels - e.g., RHEL6 */ 3033 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 3034 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 3035 else if (is_valid_tracepoint("syscalls:sys_enter")) 3036 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 3037 else { 3038 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 3039 goto out_free; 3040 } 3041 } 3042 3043 rec_argv[j++] = "--filter"; 3044 rec_argv[j++] = filter; 3045 3046 if (trace->trace_pgfaults & TRACE_PFMAJ) 3047 for (i = 0; i < majpf_args_nr; i++) 3048 rec_argv[j++] = majpf_args[i]; 3049 3050 if (trace->trace_pgfaults & TRACE_PFMIN) 3051 for (i = 0; i < minpf_args_nr; i++) 3052 rec_argv[j++] = minpf_args[i]; 3053 3054 for (i = 0; i < (unsigned int)argc; i++) 3055 rec_argv[j++] = argv[i]; 3056 3057 err = cmd_record(j, rec_argv); 3058 out_free: 3059 free(filter); 3060 free(rec_argv); 3061 return err; 3062 } 3063 3064 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 3065 3066 static bool evlist__add_vfs_getname(struct evlist *evlist) 3067 { 3068 bool found = false; 3069 struct evsel *evsel, *tmp; 3070 struct parse_events_error err; 3071 int ret; 3072 3073 parse_events_error__init(&err); 3074 ret = parse_events(evlist, "probe:vfs_getname*", &err); 3075 parse_events_error__exit(&err); 3076 if (ret) 3077 return false; 3078 3079 evlist__for_each_entry_safe(evlist, evsel, tmp) { 3080 if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) 3081 continue; 3082 3083 if (evsel__field(evsel, "pathname")) { 3084 evsel->handler = trace__vfs_getname; 3085 found = true; 3086 continue; 3087 } 3088 3089 list_del_init(&evsel->core.node); 3090 evsel->evlist = NULL; 3091 evsel__delete(evsel); 3092 } 3093 3094 return found; 3095 } 3096 3097 static struct evsel *evsel__new_pgfault(u64 config) 3098 { 3099 struct evsel *evsel; 3100 struct perf_event_attr attr = { 3101 .type = PERF_TYPE_SOFTWARE, 3102 .mmap_data = 1, 3103 }; 3104 3105 attr.config = config; 3106 attr.sample_period = 1; 3107 3108 event_attr_init(&attr); 3109 3110 evsel = evsel__new(&attr); 3111 if (evsel) 3112 evsel->handler = trace__pgfault; 3113 3114 return evsel; 3115 } 3116 3117 static void evlist__free_syscall_tp_fields(struct evlist *evlist) 3118 { 3119 struct evsel *evsel; 3120 3121 evlist__for_each_entry(evlist, evsel) { 3122 struct evsel_trace *et = evsel->priv; 3123 3124 if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls")) 3125 continue; 3126 3127 free(et->fmt); 3128 free(et); 3129 } 3130 } 3131 3132 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 3133 { 3134 const u32 type = event->header.type; 3135 struct evsel *evsel; 3136 3137 if (type != PERF_RECORD_SAMPLE) { 3138 trace__process_event(trace, trace->host, event, sample); 3139 return; 3140 } 3141 3142 evsel = evlist__id2evsel(trace->evlist, sample->id); 3143 if (evsel == NULL) { 3144 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 3145 return; 3146 } 3147 3148 if (evswitch__discard(&trace->evswitch, evsel)) 3149 return; 3150 3151 trace__set_base_time(trace, evsel, sample); 3152 3153 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 3154 sample->raw_data == NULL) { 3155 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 3156 evsel__name(evsel), sample->tid, 3157 sample->cpu, sample->raw_size); 3158 } else { 3159 tracepoint_handler handler = evsel->handler; 3160 handler(trace, evsel, event, sample); 3161 } 3162 3163 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 3164 interrupted = true; 3165 } 3166 3167 static int trace__add_syscall_newtp(struct trace *trace) 3168 { 3169 int ret = -1; 3170 struct evlist *evlist = trace->evlist; 3171 struct evsel *sys_enter, *sys_exit; 3172 3173 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 3174 if (sys_enter == NULL) 3175 goto out; 3176 3177 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 3178 goto out_delete_sys_enter; 3179 3180 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 3181 if (sys_exit == NULL) 3182 goto out_delete_sys_enter; 3183 3184 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 3185 goto out_delete_sys_exit; 3186 3187 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 3188 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 3189 3190 evlist__add(evlist, sys_enter); 3191 evlist__add(evlist, sys_exit); 3192 3193 if (callchain_param.enabled && !trace->kernel_syscallchains) { 3194 /* 3195 * We're interested only in the user space callchain 3196 * leading to the syscall, allow overriding that for 3197 * debugging reasons using --kernel_syscall_callchains 3198 */ 3199 sys_exit->core.attr.exclude_callchain_kernel = 1; 3200 } 3201 3202 trace->syscalls.events.sys_enter = sys_enter; 3203 trace->syscalls.events.sys_exit = sys_exit; 3204 3205 ret = 0; 3206 out: 3207 return ret; 3208 3209 out_delete_sys_exit: 3210 evsel__delete_priv(sys_exit); 3211 out_delete_sys_enter: 3212 evsel__delete_priv(sys_enter); 3213 goto out; 3214 } 3215 3216 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 3217 { 3218 int err = -1; 3219 struct evsel *sys_exit; 3220 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 3221 trace->ev_qualifier_ids.nr, 3222 trace->ev_qualifier_ids.entries); 3223 3224 if (filter == NULL) 3225 goto out_enomem; 3226 3227 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { 3228 sys_exit = trace->syscalls.events.sys_exit; 3229 err = evsel__append_tp_filter(sys_exit, filter); 3230 } 3231 3232 free(filter); 3233 out: 3234 return err; 3235 out_enomem: 3236 errno = ENOMEM; 3237 goto out; 3238 } 3239 3240 #ifdef HAVE_LIBBPF_SUPPORT 3241 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) 3242 { 3243 if (trace->bpf_obj == NULL) 3244 return NULL; 3245 3246 return bpf_object__find_map_by_name(trace->bpf_obj, name); 3247 } 3248 3249 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3250 { 3251 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); 3252 } 3253 3254 static void trace__set_bpf_map_syscalls(struct trace *trace) 3255 { 3256 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); 3257 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); 3258 } 3259 3260 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 3261 { 3262 struct bpf_program *pos, *prog = NULL; 3263 const char *sec_name; 3264 3265 if (trace->bpf_obj == NULL) 3266 return NULL; 3267 3268 bpf_object__for_each_program(pos, trace->bpf_obj) { 3269 sec_name = bpf_program__section_name(pos); 3270 if (sec_name && !strcmp(sec_name, name)) { 3271 prog = pos; 3272 break; 3273 } 3274 } 3275 3276 return prog; 3277 } 3278 3279 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 3280 const char *prog_name, const char *type) 3281 { 3282 struct bpf_program *prog; 3283 3284 if (prog_name == NULL) { 3285 char default_prog_name[256]; 3286 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); 3287 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3288 if (prog != NULL) 3289 goto out_found; 3290 if (sc->fmt && sc->fmt->alias) { 3291 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); 3292 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3293 if (prog != NULL) 3294 goto out_found; 3295 } 3296 goto out_unaugmented; 3297 } 3298 3299 prog = trace__find_bpf_program_by_title(trace, prog_name); 3300 3301 if (prog != NULL) { 3302 out_found: 3303 return prog; 3304 } 3305 3306 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 3307 prog_name, type, sc->name); 3308 out_unaugmented: 3309 return trace->syscalls.unaugmented_prog; 3310 } 3311 3312 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 3313 { 3314 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3315 3316 if (sc == NULL) 3317 return; 3318 3319 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3320 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 3321 } 3322 3323 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 3324 { 3325 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3326 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3327 } 3328 3329 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 3330 { 3331 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3332 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3333 } 3334 3335 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 3336 { 3337 struct tep_format_field *field, *candidate_field; 3338 int id; 3339 3340 /* 3341 * We're only interested in syscalls that have a pointer: 3342 */ 3343 for (field = sc->args; field; field = field->next) { 3344 if (field->flags & TEP_FIELD_IS_POINTER) 3345 goto try_to_find_pair; 3346 } 3347 3348 return NULL; 3349 3350 try_to_find_pair: 3351 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 3352 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3353 struct bpf_program *pair_prog; 3354 bool is_candidate = false; 3355 3356 if (pair == NULL || pair == sc || 3357 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) 3358 continue; 3359 3360 for (field = sc->args, candidate_field = pair->args; 3361 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3362 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3363 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3364 3365 if (is_pointer) { 3366 if (!candidate_is_pointer) { 3367 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3368 continue; 3369 } 3370 } else { 3371 if (candidate_is_pointer) { 3372 // The candidate might copy a pointer we don't have, skip it. 3373 goto next_candidate; 3374 } 3375 continue; 3376 } 3377 3378 if (strcmp(field->type, candidate_field->type)) 3379 goto next_candidate; 3380 3381 is_candidate = true; 3382 } 3383 3384 if (!is_candidate) 3385 goto next_candidate; 3386 3387 /* 3388 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3389 * then it may be collecting that and we then can't use it, as it would collect 3390 * more than what is common to the two syscalls. 3391 */ 3392 if (candidate_field) { 3393 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3394 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3395 goto next_candidate; 3396 } 3397 3398 pair_prog = pair->bpf_prog.sys_enter; 3399 /* 3400 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3401 * have been searched for, so search it here and if it returns the 3402 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3403 * program for a filtered syscall on a non-filtered one. 3404 * 3405 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3406 * useful for "renameat2". 3407 */ 3408 if (pair_prog == NULL) { 3409 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3410 if (pair_prog == trace->syscalls.unaugmented_prog) 3411 goto next_candidate; 3412 } 3413 3414 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3415 return pair_prog; 3416 next_candidate: 3417 continue; 3418 } 3419 3420 return NULL; 3421 } 3422 3423 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3424 { 3425 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), 3426 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); 3427 int err = 0, key; 3428 3429 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3430 int prog_fd; 3431 3432 if (!trace__syscall_enabled(trace, key)) 3433 continue; 3434 3435 trace__init_syscall_bpf_progs(trace, key); 3436 3437 // It'll get at least the "!raw_syscalls:unaugmented" 3438 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3439 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3440 if (err) 3441 break; 3442 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3443 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3444 if (err) 3445 break; 3446 } 3447 3448 /* 3449 * Now lets do a second pass looking for enabled syscalls without 3450 * an augmenter that have a signature that is a superset of another 3451 * syscall with an augmenter so that we can auto-reuse it. 3452 * 3453 * I.e. if we have an augmenter for the "open" syscall that has 3454 * this signature: 3455 * 3456 * int open(const char *pathname, int flags, mode_t mode); 3457 * 3458 * I.e. that will collect just the first string argument, then we 3459 * can reuse it for the 'creat' syscall, that has this signature: 3460 * 3461 * int creat(const char *pathname, mode_t mode); 3462 * 3463 * and for: 3464 * 3465 * int stat(const char *pathname, struct stat *statbuf); 3466 * int lstat(const char *pathname, struct stat *statbuf); 3467 * 3468 * Because the 'open' augmenter will collect the first arg as a string, 3469 * and leave alone all the other args, which already helps with 3470 * beautifying 'stat' and 'lstat''s pathname arg. 3471 * 3472 * Then, in time, when 'stat' gets an augmenter that collects both 3473 * first and second arg (this one on the raw_syscalls:sys_exit prog 3474 * array tail call, then that one will be used. 3475 */ 3476 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3477 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3478 struct bpf_program *pair_prog; 3479 int prog_fd; 3480 3481 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3482 continue; 3483 3484 /* 3485 * For now we're just reusing the sys_enter prog, and if it 3486 * already has an augmenter, we don't need to find one. 3487 */ 3488 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) 3489 continue; 3490 3491 /* 3492 * Look at all the other syscalls for one that has a signature 3493 * that is close enough that we can share: 3494 */ 3495 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3496 if (pair_prog == NULL) 3497 continue; 3498 3499 sc->bpf_prog.sys_enter = pair_prog; 3500 3501 /* 3502 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3503 * with the fd for the program we're reusing: 3504 */ 3505 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3506 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3507 if (err) 3508 break; 3509 } 3510 3511 3512 return err; 3513 } 3514 3515 static void trace__delete_augmented_syscalls(struct trace *trace) 3516 { 3517 struct evsel *evsel, *tmp; 3518 3519 evlist__remove(trace->evlist, trace->syscalls.events.augmented); 3520 evsel__delete(trace->syscalls.events.augmented); 3521 trace->syscalls.events.augmented = NULL; 3522 3523 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) { 3524 if (evsel->bpf_obj == trace->bpf_obj) { 3525 evlist__remove(trace->evlist, evsel); 3526 evsel__delete(evsel); 3527 } 3528 3529 } 3530 3531 bpf_object__close(trace->bpf_obj); 3532 trace->bpf_obj = NULL; 3533 } 3534 #else // HAVE_LIBBPF_SUPPORT 3535 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused, 3536 const char *name __maybe_unused) 3537 { 3538 return NULL; 3539 } 3540 3541 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused) 3542 { 3543 } 3544 3545 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused) 3546 { 3547 } 3548 3549 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, 3550 const char *name __maybe_unused) 3551 { 3552 return NULL; 3553 } 3554 3555 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) 3556 { 3557 return 0; 3558 } 3559 3560 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused) 3561 { 3562 } 3563 #endif // HAVE_LIBBPF_SUPPORT 3564 3565 static bool trace__only_augmented_syscalls_evsels(struct trace *trace) 3566 { 3567 struct evsel *evsel; 3568 3569 evlist__for_each_entry(trace->evlist, evsel) { 3570 if (evsel == trace->syscalls.events.augmented || 3571 evsel->bpf_obj == trace->bpf_obj) 3572 continue; 3573 3574 return false; 3575 } 3576 3577 return true; 3578 } 3579 3580 static int trace__set_ev_qualifier_filter(struct trace *trace) 3581 { 3582 if (trace->syscalls.events.sys_enter) 3583 return trace__set_ev_qualifier_tp_filter(trace); 3584 return 0; 3585 } 3586 3587 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3588 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3589 { 3590 int err = 0; 3591 #ifdef HAVE_LIBBPF_SUPPORT 3592 bool value = true; 3593 int map_fd = bpf_map__fd(map); 3594 size_t i; 3595 3596 for (i = 0; i < npids; ++i) { 3597 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3598 if (err) 3599 break; 3600 } 3601 #endif 3602 return err; 3603 } 3604 3605 static int trace__set_filter_loop_pids(struct trace *trace) 3606 { 3607 unsigned int nr = 1, err; 3608 pid_t pids[32] = { 3609 getpid(), 3610 }; 3611 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3612 3613 while (thread && nr < ARRAY_SIZE(pids)) { 3614 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 3615 3616 if (parent == NULL) 3617 break; 3618 3619 if (!strcmp(thread__comm_str(parent), "sshd") || 3620 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3621 pids[nr++] = parent->tid; 3622 break; 3623 } 3624 thread = parent; 3625 } 3626 3627 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); 3628 if (!err && trace->filter_pids.map) 3629 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3630 3631 return err; 3632 } 3633 3634 static int trace__set_filter_pids(struct trace *trace) 3635 { 3636 int err = 0; 3637 /* 3638 * Better not use !target__has_task() here because we need to cover the 3639 * case where no threads were specified in the command line, but a 3640 * workload was, and in that case we will fill in the thread_map when 3641 * we fork the workload in evlist__prepare_workload. 3642 */ 3643 if (trace->filter_pids.nr > 0) { 3644 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3645 trace->filter_pids.entries); 3646 if (!err && trace->filter_pids.map) { 3647 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3648 trace->filter_pids.entries); 3649 } 3650 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3651 err = trace__set_filter_loop_pids(trace); 3652 } 3653 3654 return err; 3655 } 3656 3657 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3658 { 3659 struct evlist *evlist = trace->evlist; 3660 struct perf_sample sample; 3661 int err = evlist__parse_sample(evlist, event, &sample); 3662 3663 if (err) 3664 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3665 else 3666 trace__handle_event(trace, event, &sample); 3667 3668 return 0; 3669 } 3670 3671 static int __trace__flush_events(struct trace *trace) 3672 { 3673 u64 first = ordered_events__first_time(&trace->oe.data); 3674 u64 flush = trace->oe.last - NSEC_PER_SEC; 3675 3676 /* Is there some thing to flush.. */ 3677 if (first && first < flush) 3678 return ordered_events__flush_time(&trace->oe.data, flush); 3679 3680 return 0; 3681 } 3682 3683 static int trace__flush_events(struct trace *trace) 3684 { 3685 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3686 } 3687 3688 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3689 { 3690 int err; 3691 3692 if (!trace->sort_events) 3693 return __trace__deliver_event(trace, event); 3694 3695 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3696 if (err && err != -1) 3697 return err; 3698 3699 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); 3700 if (err) 3701 return err; 3702 3703 return trace__flush_events(trace); 3704 } 3705 3706 static int ordered_events__deliver_event(struct ordered_events *oe, 3707 struct ordered_event *event) 3708 { 3709 struct trace *trace = container_of(oe, struct trace, oe.data); 3710 3711 return __trace__deliver_event(trace, event->event); 3712 } 3713 3714 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) 3715 { 3716 struct tep_format_field *field; 3717 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); 3718 3719 if (evsel->tp_format == NULL || fmt == NULL) 3720 return NULL; 3721 3722 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) 3723 if (strcmp(field->name, arg) == 0) 3724 return fmt; 3725 3726 return NULL; 3727 } 3728 3729 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) 3730 { 3731 char *tok, *left = evsel->filter, *new_filter = evsel->filter; 3732 3733 while ((tok = strpbrk(left, "=<>!")) != NULL) { 3734 char *right = tok + 1, *right_end; 3735 3736 if (*right == '=') 3737 ++right; 3738 3739 while (isspace(*right)) 3740 ++right; 3741 3742 if (*right == '\0') 3743 break; 3744 3745 while (!isalpha(*left)) 3746 if (++left == tok) { 3747 /* 3748 * Bail out, can't find the name of the argument that is being 3749 * used in the filter, let it try to set this filter, will fail later. 3750 */ 3751 return 0; 3752 } 3753 3754 right_end = right + 1; 3755 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') 3756 ++right_end; 3757 3758 if (isalpha(*right)) { 3759 struct syscall_arg_fmt *fmt; 3760 int left_size = tok - left, 3761 right_size = right_end - right; 3762 char arg[128]; 3763 3764 while (isspace(left[left_size - 1])) 3765 --left_size; 3766 3767 scnprintf(arg, sizeof(arg), "%.*s", left_size, left); 3768 3769 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); 3770 if (fmt == NULL) { 3771 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", 3772 arg, evsel->name, evsel->filter); 3773 return -1; 3774 } 3775 3776 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", 3777 arg, (int)(right - tok), tok, right_size, right); 3778 3779 if (fmt->strtoul) { 3780 u64 val; 3781 struct syscall_arg syscall_arg = { 3782 .parm = fmt->parm, 3783 }; 3784 3785 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { 3786 char *n, expansion[19]; 3787 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); 3788 int expansion_offset = right - new_filter; 3789 3790 pr_debug("%s", expansion); 3791 3792 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { 3793 pr_debug(" out of memory!\n"); 3794 free(new_filter); 3795 return -1; 3796 } 3797 if (new_filter != evsel->filter) 3798 free(new_filter); 3799 left = n + expansion_offset + expansion_lenght; 3800 new_filter = n; 3801 } else { 3802 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3803 right_size, right, arg, evsel->name, evsel->filter); 3804 return -1; 3805 } 3806 } else { 3807 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3808 arg, evsel->name, evsel->filter); 3809 return -1; 3810 } 3811 3812 pr_debug("\n"); 3813 } else { 3814 left = right_end; 3815 } 3816 } 3817 3818 if (new_filter != evsel->filter) { 3819 pr_debug("New filter for %s: %s\n", evsel->name, new_filter); 3820 evsel__set_filter(evsel, new_filter); 3821 free(new_filter); 3822 } 3823 3824 return 0; 3825 } 3826 3827 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) 3828 { 3829 struct evlist *evlist = trace->evlist; 3830 struct evsel *evsel; 3831 3832 evlist__for_each_entry(evlist, evsel) { 3833 if (evsel->filter == NULL) 3834 continue; 3835 3836 if (trace__expand_filter(trace, evsel)) { 3837 *err_evsel = evsel; 3838 return -1; 3839 } 3840 } 3841 3842 return 0; 3843 } 3844 3845 static int trace__run(struct trace *trace, int argc, const char **argv) 3846 { 3847 struct evlist *evlist = trace->evlist; 3848 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3849 int err = -1, i; 3850 unsigned long before; 3851 const bool forks = argc > 0; 3852 bool draining = false; 3853 3854 trace->live = true; 3855 3856 if (!trace->raw_augmented_syscalls) { 3857 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3858 goto out_error_raw_syscalls; 3859 3860 if (trace->trace_syscalls) 3861 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3862 } 3863 3864 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3865 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3866 if (pgfault_maj == NULL) 3867 goto out_error_mem; 3868 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3869 evlist__add(evlist, pgfault_maj); 3870 } 3871 3872 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3873 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3874 if (pgfault_min == NULL) 3875 goto out_error_mem; 3876 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3877 evlist__add(evlist, pgfault_min); 3878 } 3879 3880 /* Enable ignoring missing threads when -u/-p option is defined. */ 3881 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; 3882 3883 if (trace->sched && 3884 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) 3885 goto out_error_sched_stat_runtime; 3886 /* 3887 * If a global cgroup was set, apply it to all the events without an 3888 * explicit cgroup. I.e.: 3889 * 3890 * trace -G A -e sched:*switch 3891 * 3892 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3893 * _and_ sched:sched_switch to the 'A' cgroup, while: 3894 * 3895 * trace -e sched:*switch -G A 3896 * 3897 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3898 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3899 * a cgroup (on the root cgroup, sys wide, etc). 3900 * 3901 * Multiple cgroups: 3902 * 3903 * trace -G A -e sched:*switch -G B 3904 * 3905 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3906 * to the 'B' cgroup. 3907 * 3908 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3909 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3910 */ 3911 if (trace->cgroup) 3912 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3913 3914 err = evlist__create_maps(evlist, &trace->opts.target); 3915 if (err < 0) { 3916 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3917 goto out_delete_evlist; 3918 } 3919 3920 err = trace__symbols_init(trace, evlist); 3921 if (err < 0) { 3922 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3923 goto out_delete_evlist; 3924 } 3925 3926 evlist__config(evlist, &trace->opts, &callchain_param); 3927 3928 if (forks) { 3929 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); 3930 if (err < 0) { 3931 fprintf(trace->output, "Couldn't run the workload!\n"); 3932 goto out_delete_evlist; 3933 } 3934 workload_pid = evlist->workload.pid; 3935 } 3936 3937 err = evlist__open(evlist); 3938 if (err < 0) 3939 goto out_error_open; 3940 3941 err = bpf__apply_obj_config(); 3942 if (err) { 3943 char errbuf[BUFSIZ]; 3944 3945 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 3946 pr_err("ERROR: Apply config to BPF failed: %s\n", 3947 errbuf); 3948 goto out_error_open; 3949 } 3950 3951 err = trace__set_filter_pids(trace); 3952 if (err < 0) 3953 goto out_error_mem; 3954 3955 if (trace->syscalls.prog_array.sys_enter) 3956 trace__init_syscalls_bpf_prog_array_maps(trace); 3957 3958 if (trace->ev_qualifier_ids.nr > 0) { 3959 err = trace__set_ev_qualifier_filter(trace); 3960 if (err < 0) 3961 goto out_errno; 3962 3963 if (trace->syscalls.events.sys_exit) { 3964 pr_debug("event qualifier tracepoint filter: %s\n", 3965 trace->syscalls.events.sys_exit->filter); 3966 } 3967 } 3968 3969 /* 3970 * If the "close" syscall is not traced, then we will not have the 3971 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 3972 * fd->pathname table and were ending up showing the last value set by 3973 * syscalls opening a pathname and associating it with a descriptor or 3974 * reading it from /proc/pid/fd/ in cases where that doesn't make 3975 * sense. 3976 * 3977 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 3978 * not in use. 3979 */ 3980 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 3981 3982 err = trace__expand_filters(trace, &evsel); 3983 if (err) 3984 goto out_delete_evlist; 3985 err = evlist__apply_filters(evlist, &evsel); 3986 if (err < 0) 3987 goto out_error_apply_filters; 3988 3989 if (trace->dump.map) 3990 bpf_map__fprintf(trace->dump.map, trace->output); 3991 3992 err = evlist__mmap(evlist, trace->opts.mmap_pages); 3993 if (err < 0) 3994 goto out_error_mmap; 3995 3996 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3997 evlist__enable(evlist); 3998 3999 if (forks) 4000 evlist__start_workload(evlist); 4001 4002 if (trace->opts.initial_delay) { 4003 usleep(trace->opts.initial_delay * 1000); 4004 evlist__enable(evlist); 4005 } 4006 4007 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 4008 perf_thread_map__nr(evlist->core.threads) > 1 || 4009 evlist__first(evlist)->core.attr.inherit; 4010 4011 /* 4012 * Now that we already used evsel->core.attr to ask the kernel to setup the 4013 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 4014 * trace__resolve_callchain(), allowing per-event max-stack settings 4015 * to override an explicitly set --max-stack global setting. 4016 */ 4017 evlist__for_each_entry(evlist, evsel) { 4018 if (evsel__has_callchain(evsel) && 4019 evsel->core.attr.sample_max_stack == 0) 4020 evsel->core.attr.sample_max_stack = trace->max_stack; 4021 } 4022 again: 4023 before = trace->nr_events; 4024 4025 for (i = 0; i < evlist->core.nr_mmaps; i++) { 4026 union perf_event *event; 4027 struct mmap *md; 4028 4029 md = &evlist->mmap[i]; 4030 if (perf_mmap__read_init(&md->core) < 0) 4031 continue; 4032 4033 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 4034 ++trace->nr_events; 4035 4036 err = trace__deliver_event(trace, event); 4037 if (err) 4038 goto out_disable; 4039 4040 perf_mmap__consume(&md->core); 4041 4042 if (interrupted) 4043 goto out_disable; 4044 4045 if (done && !draining) { 4046 evlist__disable(evlist); 4047 draining = true; 4048 } 4049 } 4050 perf_mmap__read_done(&md->core); 4051 } 4052 4053 if (trace->nr_events == before) { 4054 int timeout = done ? 100 : -1; 4055 4056 if (!draining && evlist__poll(evlist, timeout) > 0) { 4057 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 4058 draining = true; 4059 4060 goto again; 4061 } else { 4062 if (trace__flush_events(trace)) 4063 goto out_disable; 4064 } 4065 } else { 4066 goto again; 4067 } 4068 4069 out_disable: 4070 thread__zput(trace->current); 4071 4072 evlist__disable(evlist); 4073 4074 if (trace->sort_events) 4075 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 4076 4077 if (!err) { 4078 if (trace->summary) 4079 trace__fprintf_thread_summary(trace, trace->output); 4080 4081 if (trace->show_tool_stats) { 4082 fprintf(trace->output, "Stats:\n " 4083 " vfs_getname : %" PRIu64 "\n" 4084 " proc_getname: %" PRIu64 "\n", 4085 trace->stats.vfs_getname, 4086 trace->stats.proc_getname); 4087 } 4088 } 4089 4090 out_delete_evlist: 4091 trace__symbols__exit(trace); 4092 evlist__free_syscall_tp_fields(evlist); 4093 evlist__delete(evlist); 4094 cgroup__put(trace->cgroup); 4095 trace->evlist = NULL; 4096 trace->live = false; 4097 return err; 4098 { 4099 char errbuf[BUFSIZ]; 4100 4101 out_error_sched_stat_runtime: 4102 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 4103 goto out_error; 4104 4105 out_error_raw_syscalls: 4106 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 4107 goto out_error; 4108 4109 out_error_mmap: 4110 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 4111 goto out_error; 4112 4113 out_error_open: 4114 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 4115 4116 out_error: 4117 fprintf(trace->output, "%s\n", errbuf); 4118 goto out_delete_evlist; 4119 4120 out_error_apply_filters: 4121 fprintf(trace->output, 4122 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 4123 evsel->filter, evsel__name(evsel), errno, 4124 str_error_r(errno, errbuf, sizeof(errbuf))); 4125 goto out_delete_evlist; 4126 } 4127 out_error_mem: 4128 fprintf(trace->output, "Not enough memory to run!\n"); 4129 goto out_delete_evlist; 4130 4131 out_errno: 4132 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 4133 goto out_delete_evlist; 4134 } 4135 4136 static int trace__replay(struct trace *trace) 4137 { 4138 const struct evsel_str_handler handlers[] = { 4139 { "probe:vfs_getname", trace__vfs_getname, }, 4140 }; 4141 struct perf_data data = { 4142 .path = input_name, 4143 .mode = PERF_DATA_MODE_READ, 4144 .force = trace->force, 4145 }; 4146 struct perf_session *session; 4147 struct evsel *evsel; 4148 int err = -1; 4149 4150 trace->tool.sample = trace__process_sample; 4151 trace->tool.mmap = perf_event__process_mmap; 4152 trace->tool.mmap2 = perf_event__process_mmap2; 4153 trace->tool.comm = perf_event__process_comm; 4154 trace->tool.exit = perf_event__process_exit; 4155 trace->tool.fork = perf_event__process_fork; 4156 trace->tool.attr = perf_event__process_attr; 4157 trace->tool.tracing_data = perf_event__process_tracing_data; 4158 trace->tool.build_id = perf_event__process_build_id; 4159 trace->tool.namespaces = perf_event__process_namespaces; 4160 4161 trace->tool.ordered_events = true; 4162 trace->tool.ordering_requires_timestamps = true; 4163 4164 /* add tid to output */ 4165 trace->multiple_threads = true; 4166 4167 session = perf_session__new(&data, &trace->tool); 4168 if (IS_ERR(session)) 4169 return PTR_ERR(session); 4170 4171 if (trace->opts.target.pid) 4172 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 4173 4174 if (trace->opts.target.tid) 4175 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 4176 4177 if (symbol__init(&session->header.env) < 0) 4178 goto out; 4179 4180 trace->host = &session->machines.host; 4181 4182 err = perf_session__set_tracepoints_handlers(session, handlers); 4183 if (err) 4184 goto out; 4185 4186 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); 4187 trace->syscalls.events.sys_enter = evsel; 4188 /* older kernels have syscalls tp versus raw_syscalls */ 4189 if (evsel == NULL) 4190 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); 4191 4192 if (evsel && 4193 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 4194 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 4195 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 4196 goto out; 4197 } 4198 4199 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); 4200 trace->syscalls.events.sys_exit = evsel; 4201 if (evsel == NULL) 4202 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); 4203 if (evsel && 4204 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 4205 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 4206 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 4207 goto out; 4208 } 4209 4210 evlist__for_each_entry(session->evlist, evsel) { 4211 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 4212 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 4213 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 4214 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 4215 evsel->handler = trace__pgfault; 4216 } 4217 4218 setup_pager(); 4219 4220 err = perf_session__process_events(session); 4221 if (err) 4222 pr_err("Failed to process events, error %d", err); 4223 4224 else if (trace->summary) 4225 trace__fprintf_thread_summary(trace, trace->output); 4226 4227 out: 4228 perf_session__delete(session); 4229 4230 return err; 4231 } 4232 4233 static size_t trace__fprintf_threads_header(FILE *fp) 4234 { 4235 size_t printed; 4236 4237 printed = fprintf(fp, "\n Summary of events:\n\n"); 4238 4239 return printed; 4240 } 4241 4242 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 4243 struct syscall_stats *stats; 4244 double msecs; 4245 int syscall; 4246 ) 4247 { 4248 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 4249 struct syscall_stats *stats = source->priv; 4250 4251 entry->syscall = source->i; 4252 entry->stats = stats; 4253 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; 4254 } 4255 4256 static size_t thread__dump_stats(struct thread_trace *ttrace, 4257 struct trace *trace, FILE *fp) 4258 { 4259 size_t printed = 0; 4260 struct syscall *sc; 4261 struct rb_node *nd; 4262 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 4263 4264 if (syscall_stats == NULL) 4265 return 0; 4266 4267 printed += fprintf(fp, "\n"); 4268 4269 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); 4270 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 4271 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); 4272 4273 resort_rb__for_each_entry(nd, syscall_stats) { 4274 struct syscall_stats *stats = syscall_stats_entry->stats; 4275 if (stats) { 4276 double min = (double)(stats->stats.min) / NSEC_PER_MSEC; 4277 double max = (double)(stats->stats.max) / NSEC_PER_MSEC; 4278 double avg = avg_stats(&stats->stats); 4279 double pct; 4280 u64 n = (u64)stats->stats.n; 4281 4282 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; 4283 avg /= NSEC_PER_MSEC; 4284 4285 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 4286 printed += fprintf(fp, " %-15s", sc->name); 4287 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", 4288 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); 4289 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 4290 4291 if (trace->errno_summary && stats->nr_failures) { 4292 const char *arch_name = perf_env__arch(trace->host->env); 4293 int e; 4294 4295 for (e = 0; e < stats->max_errno; ++e) { 4296 if (stats->errnos[e] != 0) 4297 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]); 4298 } 4299 } 4300 } 4301 } 4302 4303 resort_rb__delete(syscall_stats); 4304 printed += fprintf(fp, "\n\n"); 4305 4306 return printed; 4307 } 4308 4309 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 4310 { 4311 size_t printed = 0; 4312 struct thread_trace *ttrace = thread__priv(thread); 4313 double ratio; 4314 4315 if (ttrace == NULL) 4316 return 0; 4317 4318 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 4319 4320 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 4321 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 4322 printed += fprintf(fp, "%.1f%%", ratio); 4323 if (ttrace->pfmaj) 4324 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 4325 if (ttrace->pfmin) 4326 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 4327 if (trace->sched) 4328 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 4329 else if (fputc('\n', fp) != EOF) 4330 ++printed; 4331 4332 printed += thread__dump_stats(ttrace, trace, fp); 4333 4334 return printed; 4335 } 4336 4337 static unsigned long thread__nr_events(struct thread_trace *ttrace) 4338 { 4339 return ttrace ? ttrace->nr_events : 0; 4340 } 4341 4342 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 4343 struct thread *thread; 4344 ) 4345 { 4346 entry->thread = rb_entry(nd, struct thread, rb_node); 4347 } 4348 4349 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4350 { 4351 size_t printed = trace__fprintf_threads_header(fp); 4352 struct rb_node *nd; 4353 int i; 4354 4355 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 4356 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 4357 4358 if (threads == NULL) { 4359 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 4360 return 0; 4361 } 4362 4363 resort_rb__for_each_entry(nd, threads) 4364 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 4365 4366 resort_rb__delete(threads); 4367 } 4368 return printed; 4369 } 4370 4371 static int trace__set_duration(const struct option *opt, const char *str, 4372 int unset __maybe_unused) 4373 { 4374 struct trace *trace = opt->value; 4375 4376 trace->duration_filter = atof(str); 4377 return 0; 4378 } 4379 4380 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4381 int unset __maybe_unused) 4382 { 4383 int ret = -1; 4384 size_t i; 4385 struct trace *trace = opt->value; 4386 /* 4387 * FIXME: introduce a intarray class, plain parse csv and create a 4388 * { int nr, int entries[] } struct... 4389 */ 4390 struct intlist *list = intlist__new(str); 4391 4392 if (list == NULL) 4393 return -1; 4394 4395 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4396 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4397 4398 if (trace->filter_pids.entries == NULL) 4399 goto out; 4400 4401 trace->filter_pids.entries[0] = getpid(); 4402 4403 for (i = 1; i < trace->filter_pids.nr; ++i) 4404 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4405 4406 intlist__delete(list); 4407 ret = 0; 4408 out: 4409 return ret; 4410 } 4411 4412 static int trace__open_output(struct trace *trace, const char *filename) 4413 { 4414 struct stat st; 4415 4416 if (!stat(filename, &st) && st.st_size) { 4417 char oldname[PATH_MAX]; 4418 4419 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4420 unlink(oldname); 4421 rename(filename, oldname); 4422 } 4423 4424 trace->output = fopen(filename, "w"); 4425 4426 return trace->output == NULL ? -errno : 0; 4427 } 4428 4429 static int parse_pagefaults(const struct option *opt, const char *str, 4430 int unset __maybe_unused) 4431 { 4432 int *trace_pgfaults = opt->value; 4433 4434 if (strcmp(str, "all") == 0) 4435 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4436 else if (strcmp(str, "maj") == 0) 4437 *trace_pgfaults |= TRACE_PFMAJ; 4438 else if (strcmp(str, "min") == 0) 4439 *trace_pgfaults |= TRACE_PFMIN; 4440 else 4441 return -1; 4442 4443 return 0; 4444 } 4445 4446 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4447 { 4448 struct evsel *evsel; 4449 4450 evlist__for_each_entry(evlist, evsel) { 4451 if (evsel->handler == NULL) 4452 evsel->handler = handler; 4453 } 4454 } 4455 4456 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4457 { 4458 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4459 4460 if (fmt) { 4461 struct syscall_fmt *scfmt = syscall_fmt__find(name); 4462 4463 if (scfmt) { 4464 int skip = 0; 4465 4466 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4467 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4468 ++skip; 4469 4470 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4471 } 4472 } 4473 } 4474 4475 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4476 { 4477 struct evsel *evsel; 4478 4479 evlist__for_each_entry(evlist, evsel) { 4480 if (evsel->priv || !evsel->tp_format) 4481 continue; 4482 4483 if (strcmp(evsel->tp_format->system, "syscalls")) { 4484 evsel__init_tp_arg_scnprintf(evsel); 4485 continue; 4486 } 4487 4488 if (evsel__init_syscall_tp(evsel)) 4489 return -1; 4490 4491 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4492 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4493 4494 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4495 return -1; 4496 4497 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4498 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4499 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4500 4501 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4502 return -1; 4503 4504 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4505 } 4506 } 4507 4508 return 0; 4509 } 4510 4511 /* 4512 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4513 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4514 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4515 * 4516 * It'd be better to introduce a parse_options() variant that would return a 4517 * list with the terms it didn't match to an event... 4518 */ 4519 static int trace__parse_events_option(const struct option *opt, const char *str, 4520 int unset __maybe_unused) 4521 { 4522 struct trace *trace = (struct trace *)opt->value; 4523 const char *s = str; 4524 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4525 int len = strlen(str) + 1, err = -1, list, idx; 4526 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4527 char group_name[PATH_MAX]; 4528 struct syscall_fmt *fmt; 4529 4530 if (strace_groups_dir == NULL) 4531 return -1; 4532 4533 if (*s == '!') { 4534 ++s; 4535 trace->not_ev_qualifier = true; 4536 } 4537 4538 while (1) { 4539 if ((sep = strchr(s, ',')) != NULL) 4540 *sep = '\0'; 4541 4542 list = 0; 4543 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4544 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4545 list = 1; 4546 goto do_concat; 4547 } 4548 4549 fmt = syscall_fmt__find_by_alias(s); 4550 if (fmt != NULL) { 4551 list = 1; 4552 s = fmt->name; 4553 } else { 4554 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4555 if (access(group_name, R_OK) == 0) 4556 list = 1; 4557 } 4558 do_concat: 4559 if (lists[list]) { 4560 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4561 } else { 4562 lists[list] = malloc(len); 4563 if (lists[list] == NULL) 4564 goto out; 4565 strcpy(lists[list], s); 4566 } 4567 4568 if (!sep) 4569 break; 4570 4571 *sep = ','; 4572 s = sep + 1; 4573 } 4574 4575 if (lists[1] != NULL) { 4576 struct strlist_config slist_config = { 4577 .dirname = strace_groups_dir, 4578 }; 4579 4580 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4581 if (trace->ev_qualifier == NULL) { 4582 fputs("Not enough memory to parse event qualifier", trace->output); 4583 goto out; 4584 } 4585 4586 if (trace__validate_ev_qualifier(trace)) 4587 goto out; 4588 trace->trace_syscalls = true; 4589 } 4590 4591 err = 0; 4592 4593 if (lists[0]) { 4594 struct option o = { 4595 .value = &trace->evlist, 4596 }; 4597 err = parse_events_option(&o, lists[0], 0); 4598 } 4599 out: 4600 free(strace_groups_dir); 4601 free(lists[0]); 4602 free(lists[1]); 4603 if (sep) 4604 *sep = ','; 4605 4606 return err; 4607 } 4608 4609 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 4610 { 4611 struct trace *trace = opt->value; 4612 4613 if (!list_empty(&trace->evlist->core.entries)) { 4614 struct option o = { 4615 .value = &trace->evlist, 4616 }; 4617 return parse_cgroups(&o, str, unset); 4618 } 4619 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4620 4621 return 0; 4622 } 4623 4624 static int trace__config(const char *var, const char *value, void *arg) 4625 { 4626 struct trace *trace = arg; 4627 int err = 0; 4628 4629 if (!strcmp(var, "trace.add_events")) { 4630 trace->perfconfig_events = strdup(value); 4631 if (trace->perfconfig_events == NULL) { 4632 pr_err("Not enough memory for %s\n", "trace.add_events"); 4633 return -1; 4634 } 4635 } else if (!strcmp(var, "trace.show_timestamp")) { 4636 trace->show_tstamp = perf_config_bool(var, value); 4637 } else if (!strcmp(var, "trace.show_duration")) { 4638 trace->show_duration = perf_config_bool(var, value); 4639 } else if (!strcmp(var, "trace.show_arg_names")) { 4640 trace->show_arg_names = perf_config_bool(var, value); 4641 if (!trace->show_arg_names) 4642 trace->show_zeros = true; 4643 } else if (!strcmp(var, "trace.show_zeros")) { 4644 bool new_show_zeros = perf_config_bool(var, value); 4645 if (!trace->show_arg_names && !new_show_zeros) { 4646 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4647 goto out; 4648 } 4649 trace->show_zeros = new_show_zeros; 4650 } else if (!strcmp(var, "trace.show_prefix")) { 4651 trace->show_string_prefix = perf_config_bool(var, value); 4652 } else if (!strcmp(var, "trace.no_inherit")) { 4653 trace->opts.no_inherit = perf_config_bool(var, value); 4654 } else if (!strcmp(var, "trace.args_alignment")) { 4655 int args_alignment = 0; 4656 if (perf_config_int(&args_alignment, var, value) == 0) 4657 trace->args_alignment = args_alignment; 4658 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4659 if (strcasecmp(value, "libtraceevent") == 0) 4660 trace->libtraceevent_print = true; 4661 else if (strcasecmp(value, "libbeauty") == 0) 4662 trace->libtraceevent_print = false; 4663 } 4664 out: 4665 return err; 4666 } 4667 4668 static void trace__exit(struct trace *trace) 4669 { 4670 int i; 4671 4672 strlist__delete(trace->ev_qualifier); 4673 free(trace->ev_qualifier_ids.entries); 4674 if (trace->syscalls.table) { 4675 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4676 syscall__exit(&trace->syscalls.table[i]); 4677 free(trace->syscalls.table); 4678 } 4679 syscalltbl__delete(trace->sctbl); 4680 zfree(&trace->perfconfig_events); 4681 } 4682 4683 int cmd_trace(int argc, const char **argv) 4684 { 4685 const char *trace_usage[] = { 4686 "perf trace [<options>] [<command>]", 4687 "perf trace [<options>] -- <command> [<options>]", 4688 "perf trace record [<options>] [<command>]", 4689 "perf trace record [<options>] -- <command> [<options>]", 4690 NULL 4691 }; 4692 struct trace trace = { 4693 .opts = { 4694 .target = { 4695 .uid = UINT_MAX, 4696 .uses_mmap = true, 4697 }, 4698 .user_freq = UINT_MAX, 4699 .user_interval = ULLONG_MAX, 4700 .no_buffering = true, 4701 .mmap_pages = UINT_MAX, 4702 }, 4703 .output = stderr, 4704 .show_comm = true, 4705 .show_tstamp = true, 4706 .show_duration = true, 4707 .show_arg_names = true, 4708 .args_alignment = 70, 4709 .trace_syscalls = false, 4710 .kernel_syscallchains = false, 4711 .max_stack = UINT_MAX, 4712 .max_events = ULONG_MAX, 4713 }; 4714 const char *map_dump_str = NULL; 4715 const char *output_name = NULL; 4716 const struct option trace_options[] = { 4717 OPT_CALLBACK('e', "event", &trace, "event", 4718 "event/syscall selector. use 'perf list' to list available events", 4719 trace__parse_events_option), 4720 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4721 "event filter", parse_filter), 4722 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4723 "show the thread COMM next to its id"), 4724 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4725 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4726 trace__parse_events_option), 4727 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4728 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4729 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4730 "trace events on existing process id"), 4731 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4732 "trace events on existing thread id"), 4733 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4734 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4735 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4736 "system-wide collection from all CPUs"), 4737 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4738 "list of cpus to monitor"), 4739 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4740 "child tasks do not inherit counters"), 4741 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4742 "number of mmap data pages", evlist__parse_mmap_pages), 4743 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4744 "user to profile"), 4745 OPT_CALLBACK(0, "duration", &trace, "float", 4746 "show only events with duration > N.M ms", 4747 trace__set_duration), 4748 #ifdef HAVE_LIBBPF_SUPPORT 4749 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 4750 #endif 4751 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4752 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4753 OPT_BOOLEAN('T', "time", &trace.full_time, 4754 "Show full timestamp, not time relative to first start"), 4755 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4756 "Show only syscalls that failed"), 4757 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4758 "Show only syscall summary with statistics"), 4759 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4760 "Show all syscalls and summary with statistics"), 4761 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4762 "Show errno stats per syscall, use with -s or -S"), 4763 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4764 "Trace pagefaults", parse_pagefaults, "maj"), 4765 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4766 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4767 OPT_CALLBACK(0, "call-graph", &trace.opts, 4768 "record_mode[,record_size]", record_callchain_help, 4769 &record_parse_callchain_opt), 4770 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4771 "Use libtraceevent to print the tracepoint arguments."), 4772 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4773 "Show the kernel callchains on the syscall exit path"), 4774 OPT_ULONG(0, "max-events", &trace.max_events, 4775 "Set the maximum number of events to print, exit after that is reached. "), 4776 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4777 "Set the minimum stack depth when parsing the callchain, " 4778 "anything below the specified depth will be ignored."), 4779 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4780 "Set the maximum stack depth when parsing the callchain, " 4781 "anything beyond the specified depth will be ignored. " 4782 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4783 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4784 "Sort batch of events before processing, use if getting out of order events"), 4785 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4786 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4787 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4788 "per thread proc mmap processing timeout in ms"), 4789 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4790 trace__parse_cgroups), 4791 OPT_INTEGER('D', "delay", &trace.opts.initial_delay, 4792 "ms to wait before starting measurement after program " 4793 "start"), 4794 OPTS_EVSWITCH(&trace.evswitch), 4795 OPT_END() 4796 }; 4797 bool __maybe_unused max_stack_user_set = true; 4798 bool mmap_pages_user_set = true; 4799 struct evsel *evsel; 4800 const char * const trace_subcommands[] = { "record", NULL }; 4801 int err = -1; 4802 char bf[BUFSIZ]; 4803 struct sigaction sigchld_act; 4804 4805 signal(SIGSEGV, sighandler_dump_stack); 4806 signal(SIGFPE, sighandler_dump_stack); 4807 signal(SIGINT, sighandler_interrupt); 4808 4809 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4810 sigchld_act.sa_flags = SA_SIGINFO; 4811 sigchld_act.sa_sigaction = sighandler_chld; 4812 sigaction(SIGCHLD, &sigchld_act, NULL); 4813 4814 trace.evlist = evlist__new(); 4815 trace.sctbl = syscalltbl__new(); 4816 4817 if (trace.evlist == NULL || trace.sctbl == NULL) { 4818 pr_err("Not enough memory to run!\n"); 4819 err = -ENOMEM; 4820 goto out; 4821 } 4822 4823 /* 4824 * Parsing .perfconfig may entail creating a BPF event, that may need 4825 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4826 * is too small. This affects just this process, not touching the 4827 * global setting. If it fails we'll get something in 'perf trace -v' 4828 * to help diagnose the problem. 4829 */ 4830 rlimit__bump_memlock(); 4831 4832 err = perf_config(trace__config, &trace); 4833 if (err) 4834 goto out; 4835 4836 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4837 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4838 4839 /* 4840 * Here we already passed thru trace__parse_events_option() and it has 4841 * already figured out if -e syscall_name, if not but if --event 4842 * foo:bar was used, the user is interested _just_ in those, say, 4843 * tracepoint events, not in the strace-like syscall-name-based mode. 4844 * 4845 * This is important because we need to check if strace-like mode is 4846 * needed to decided if we should filter out the eBPF 4847 * __augmented_syscalls__ code, if it is in the mix, say, via 4848 * .perfconfig trace.add_events, and filter those out. 4849 */ 4850 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4851 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4852 trace.trace_syscalls = true; 4853 } 4854 /* 4855 * Now that we have --verbose figured out, lets see if we need to parse 4856 * events from .perfconfig, so that if those events fail parsing, say some 4857 * BPF program fails, then we'll be able to use --verbose to see what went 4858 * wrong in more detail. 4859 */ 4860 if (trace.perfconfig_events != NULL) { 4861 struct parse_events_error parse_err; 4862 4863 parse_events_error__init(&parse_err); 4864 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4865 if (err) 4866 parse_events_error__print(&parse_err, trace.perfconfig_events); 4867 parse_events_error__exit(&parse_err); 4868 if (err) 4869 goto out; 4870 } 4871 4872 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4873 usage_with_options_msg(trace_usage, trace_options, 4874 "cgroup monitoring only available in system-wide mode"); 4875 } 4876 4877 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 4878 if (IS_ERR(evsel)) { 4879 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 4880 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 4881 goto out; 4882 } 4883 4884 if (evsel) { 4885 trace.syscalls.events.augmented = evsel; 4886 4887 evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); 4888 if (evsel == NULL) { 4889 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); 4890 goto out; 4891 } 4892 4893 if (evsel->bpf_obj == NULL) { 4894 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); 4895 goto out; 4896 } 4897 4898 trace.bpf_obj = evsel->bpf_obj; 4899 4900 /* 4901 * If we have _just_ the augmenter event but don't have a 4902 * explicit --syscalls, then assume we want all strace-like 4903 * syscalls: 4904 */ 4905 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace)) 4906 trace.trace_syscalls = true; 4907 /* 4908 * So, if we have a syscall augmenter, but trace_syscalls, aka 4909 * strace-like syscall tracing is not set, then we need to trow 4910 * away the augmenter, i.e. all the events that were created 4911 * from that BPF object file. 4912 * 4913 * This is more to fix the current .perfconfig trace.add_events 4914 * style of setting up the strace-like eBPF based syscall point 4915 * payload augmenter. 4916 * 4917 * All this complexity will be avoided by adding an alternative 4918 * to trace.add_events in the form of 4919 * trace.bpf_augmented_syscalls, that will be only parsed if we 4920 * need it. 4921 * 4922 * .perfconfig trace.add_events is still useful if we want, for 4923 * instance, have msr_write.msr in some .perfconfig profile based 4924 * 'perf trace --config determinism.profile' mode, where for some 4925 * particular goal/workload type we want a set of events and 4926 * output mode (with timings, etc) instead of having to add 4927 * all via the command line. 4928 * 4929 * Also --config to specify an alternate .perfconfig file needs 4930 * to be implemented. 4931 */ 4932 if (!trace.trace_syscalls) { 4933 trace__delete_augmented_syscalls(&trace); 4934 } else { 4935 trace__set_bpf_map_filtered_pids(&trace); 4936 trace__set_bpf_map_syscalls(&trace); 4937 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); 4938 } 4939 } 4940 4941 err = bpf__setup_stdout(trace.evlist); 4942 if (err) { 4943 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 4944 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 4945 goto out; 4946 } 4947 4948 err = -1; 4949 4950 if (map_dump_str) { 4951 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); 4952 if (trace.dump.map == NULL) { 4953 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 4954 goto out; 4955 } 4956 } 4957 4958 if (trace.trace_pgfaults) { 4959 trace.opts.sample_address = true; 4960 trace.opts.sample_time = true; 4961 } 4962 4963 if (trace.opts.mmap_pages == UINT_MAX) 4964 mmap_pages_user_set = false; 4965 4966 if (trace.max_stack == UINT_MAX) { 4967 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4968 max_stack_user_set = false; 4969 } 4970 4971 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4972 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4973 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4974 } 4975 #endif 4976 4977 if (callchain_param.enabled) { 4978 if (!mmap_pages_user_set && geteuid() == 0) 4979 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 4980 4981 symbol_conf.use_callchain = true; 4982 } 4983 4984 if (trace.evlist->core.nr_entries > 0) { 4985 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 4986 if (evlist__set_syscall_tp_fields(trace.evlist)) { 4987 perror("failed to set syscalls:* tracepoint fields"); 4988 goto out; 4989 } 4990 } 4991 4992 if (trace.sort_events) { 4993 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 4994 ordered_events__set_copy_on_queue(&trace.oe.data, true); 4995 } 4996 4997 /* 4998 * If we are augmenting syscalls, then combine what we put in the 4999 * __augmented_syscalls__ BPF map with what is in the 5000 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 5001 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 5002 * 5003 * We'll switch to look at two BPF maps, one for sys_enter and the 5004 * other for sys_exit when we start augmenting the sys_exit paths with 5005 * buffers that are being copied from kernel to userspace, think 'read' 5006 * syscall. 5007 */ 5008 if (trace.syscalls.events.augmented) { 5009 evlist__for_each_entry(trace.evlist, evsel) { 5010 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 5011 5012 if (raw_syscalls_sys_exit) { 5013 trace.raw_augmented_syscalls = true; 5014 goto init_augmented_syscall_tp; 5015 } 5016 5017 if (trace.syscalls.events.augmented->priv == NULL && 5018 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 5019 struct evsel *augmented = trace.syscalls.events.augmented; 5020 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 5021 evsel__init_augmented_syscall_tp_args(augmented)) 5022 goto out; 5023 /* 5024 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 5025 * Above we made sure we can get from the payload the tp fields 5026 * that we get from syscalls:sys_enter tracefs format file. 5027 */ 5028 augmented->handler = trace__sys_enter; 5029 /* 5030 * Now we do the same for the *syscalls:sys_enter event so that 5031 * if we handle it directly, i.e. if the BPF prog returns 0 so 5032 * as not to filter it, then we'll handle it just like we would 5033 * for the BPF_OUTPUT one: 5034 */ 5035 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 5036 evsel__init_augmented_syscall_tp_args(evsel)) 5037 goto out; 5038 evsel->handler = trace__sys_enter; 5039 } 5040 5041 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 5042 struct syscall_tp *sc; 5043 init_augmented_syscall_tp: 5044 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 5045 goto out; 5046 sc = __evsel__syscall_tp(evsel); 5047 /* 5048 * For now with BPF raw_augmented we hook into 5049 * raw_syscalls:sys_enter and there we get all 5050 * 6 syscall args plus the tracepoint common 5051 * fields and the syscall_nr (another long). 5052 * So we check if that is the case and if so 5053 * don't look after the sc->args_size but 5054 * always after the full raw_syscalls:sys_enter 5055 * payload, which is fixed. 5056 * 5057 * We'll revisit this later to pass 5058 * s->args_size to the BPF augmenter (now 5059 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5060 * so that it copies only what we need for each 5061 * syscall, like what happens when we use 5062 * syscalls:sys_enter_NAME, so that we reduce 5063 * the kernel/userspace traffic to just what is 5064 * needed for each syscall. 5065 */ 5066 if (trace.raw_augmented_syscalls) 5067 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5068 evsel__init_augmented_syscall_tp_ret(evsel); 5069 evsel->handler = trace__sys_exit; 5070 } 5071 } 5072 } 5073 5074 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5075 return trace__record(&trace, argc-1, &argv[1]); 5076 5077 /* Using just --errno-summary will trigger --summary */ 5078 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5079 trace.summary_only = true; 5080 5081 /* summary_only implies summary option, but don't overwrite summary if set */ 5082 if (trace.summary_only) 5083 trace.summary = trace.summary_only; 5084 5085 if (output_name != NULL) { 5086 err = trace__open_output(&trace, output_name); 5087 if (err < 0) { 5088 perror("failed to create output file"); 5089 goto out; 5090 } 5091 } 5092 5093 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5094 if (err) 5095 goto out_close; 5096 5097 err = target__validate(&trace.opts.target); 5098 if (err) { 5099 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5100 fprintf(trace.output, "%s", bf); 5101 goto out_close; 5102 } 5103 5104 err = target__parse_uid(&trace.opts.target); 5105 if (err) { 5106 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5107 fprintf(trace.output, "%s", bf); 5108 goto out_close; 5109 } 5110 5111 if (!argc && target__none(&trace.opts.target)) 5112 trace.opts.target.system_wide = true; 5113 5114 if (input_name) 5115 err = trace__replay(&trace); 5116 else 5117 err = trace__run(&trace, argc, argv); 5118 5119 out_close: 5120 if (output_name != NULL) 5121 fclose(trace.output); 5122 out: 5123 trace__exit(&trace); 5124 return err; 5125 } 5126