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 <traceevent/event-parse.h> 19 #include <api/fs/tracing_path.h> 20 #include <bpf/bpf.h> 21 #include "util/bpf_map.h" 22 #include "util/rlimit.h" 23 #include "builtin.h" 24 #include "util/cgroup.h" 25 #include "util/color.h" 26 #include "util/config.h" 27 #include "util/debug.h" 28 #include "util/dso.h" 29 #include "util/env.h" 30 #include "util/event.h" 31 #include "util/evsel.h" 32 #include "util/evsel_fprintf.h" 33 #include "util/synthetic-events.h" 34 #include "util/evlist.h" 35 #include "util/evswitch.h" 36 #include "util/mmap.h" 37 #include <subcmd/pager.h> 38 #include <subcmd/exec-cmd.h> 39 #include "util/machine.h" 40 #include "util/map.h" 41 #include "util/symbol.h" 42 #include "util/path.h" 43 #include "util/session.h" 44 #include "util/thread.h" 45 #include <subcmd/parse-options.h> 46 #include "util/strlist.h" 47 #include "util/intlist.h" 48 #include "util/thread_map.h" 49 #include "util/stat.h" 50 #include "util/tool.h" 51 #include "util/util.h" 52 #include "trace/beauty/beauty.h" 53 #include "trace-event.h" 54 #include "util/parse-events.h" 55 #include "util/bpf-loader.h" 56 #include "util/tracepoint.h" 57 #include "callchain.h" 58 #include "print_binary.h" 59 #include "string2.h" 60 #include "syscalltbl.h" 61 #include "rb_resort.h" 62 #include "../perf.h" 63 64 #include <errno.h> 65 #include <inttypes.h> 66 #include <poll.h> 67 #include <signal.h> 68 #include <stdlib.h> 69 #include <string.h> 70 #include <linux/err.h> 71 #include <linux/filter.h> 72 #include <linux/kernel.h> 73 #include <linux/random.h> 74 #include <linux/stringify.h> 75 #include <linux/time64.h> 76 #include <linux/zalloc.h> 77 #include <fcntl.h> 78 #include <sys/sysmacros.h> 79 80 #include <linux/ctype.h> 81 #include <perf/mmap.h> 82 83 #ifndef O_CLOEXEC 84 # define O_CLOEXEC 02000000 85 #endif 86 87 #ifndef F_LINUX_SPECIFIC_BASE 88 # define F_LINUX_SPECIFIC_BASE 1024 89 #endif 90 91 /* 92 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 93 */ 94 struct syscall_arg_fmt { 95 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 96 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); 97 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 98 void *parm; 99 const char *name; 100 u16 nr_entries; // for arrays 101 bool show_zero; 102 }; 103 104 struct syscall_fmt { 105 const char *name; 106 const char *alias; 107 struct { 108 const char *sys_enter, 109 *sys_exit; 110 } bpf_prog_name; 111 struct syscall_arg_fmt arg[6]; 112 u8 nr_args; 113 bool errpid; 114 bool timeout; 115 bool hexret; 116 }; 117 118 struct trace { 119 struct perf_tool tool; 120 struct syscalltbl *sctbl; 121 struct { 122 struct syscall *table; 123 struct bpf_map *map; 124 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY 125 struct bpf_map *sys_enter, 126 *sys_exit; 127 } prog_array; 128 struct { 129 struct evsel *sys_enter, 130 *sys_exit, 131 *augmented; 132 } events; 133 struct bpf_program *unaugmented_prog; 134 } syscalls; 135 struct { 136 struct bpf_map *map; 137 } dump; 138 struct record_opts opts; 139 struct evlist *evlist; 140 struct machine *host; 141 struct thread *current; 142 struct bpf_object *bpf_obj; 143 struct cgroup *cgroup; 144 u64 base_time; 145 FILE *output; 146 unsigned long nr_events; 147 unsigned long nr_events_printed; 148 unsigned long max_events; 149 struct evswitch evswitch; 150 struct strlist *ev_qualifier; 151 struct { 152 size_t nr; 153 int *entries; 154 } ev_qualifier_ids; 155 struct { 156 size_t nr; 157 pid_t *entries; 158 struct bpf_map *map; 159 } filter_pids; 160 double duration_filter; 161 double runtime_ms; 162 struct { 163 u64 vfs_getname, 164 proc_getname; 165 } stats; 166 unsigned int max_stack; 167 unsigned int min_stack; 168 int raw_augmented_syscalls_args_size; 169 bool raw_augmented_syscalls; 170 bool fd_path_disabled; 171 bool sort_events; 172 bool not_ev_qualifier; 173 bool live; 174 bool full_time; 175 bool sched; 176 bool multiple_threads; 177 bool summary; 178 bool summary_only; 179 bool errno_summary; 180 bool failure_only; 181 bool show_comm; 182 bool print_sample; 183 bool show_tool_stats; 184 bool trace_syscalls; 185 bool libtraceevent_print; 186 bool kernel_syscallchains; 187 s16 args_alignment; 188 bool show_tstamp; 189 bool show_duration; 190 bool show_zeros; 191 bool show_arg_names; 192 bool show_string_prefix; 193 bool force; 194 bool vfs_getname; 195 int trace_pgfaults; 196 char *perfconfig_events; 197 struct { 198 struct ordered_events data; 199 u64 last; 200 } oe; 201 }; 202 203 struct tp_field { 204 int offset; 205 union { 206 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 207 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 208 }; 209 }; 210 211 #define TP_UINT_FIELD(bits) \ 212 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 213 { \ 214 u##bits value; \ 215 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 216 return value; \ 217 } 218 219 TP_UINT_FIELD(8); 220 TP_UINT_FIELD(16); 221 TP_UINT_FIELD(32); 222 TP_UINT_FIELD(64); 223 224 #define TP_UINT_FIELD__SWAPPED(bits) \ 225 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 226 { \ 227 u##bits value; \ 228 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 229 return bswap_##bits(value);\ 230 } 231 232 TP_UINT_FIELD__SWAPPED(16); 233 TP_UINT_FIELD__SWAPPED(32); 234 TP_UINT_FIELD__SWAPPED(64); 235 236 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 237 { 238 field->offset = offset; 239 240 switch (size) { 241 case 1: 242 field->integer = tp_field__u8; 243 break; 244 case 2: 245 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 246 break; 247 case 4: 248 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 249 break; 250 case 8: 251 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 252 break; 253 default: 254 return -1; 255 } 256 257 return 0; 258 } 259 260 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 261 { 262 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 263 } 264 265 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 266 { 267 return sample->raw_data + field->offset; 268 } 269 270 static int __tp_field__init_ptr(struct tp_field *field, int offset) 271 { 272 field->offset = offset; 273 field->pointer = tp_field__ptr; 274 return 0; 275 } 276 277 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 278 { 279 return __tp_field__init_ptr(field, format_field->offset); 280 } 281 282 struct syscall_tp { 283 struct tp_field id; 284 union { 285 struct tp_field args, ret; 286 }; 287 }; 288 289 /* 290 * The evsel->priv as used by 'perf trace' 291 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME 292 * fmt: for all the other tracepoints 293 */ 294 struct evsel_trace { 295 struct syscall_tp sc; 296 struct syscall_arg_fmt *fmt; 297 }; 298 299 static struct evsel_trace *evsel_trace__new(void) 300 { 301 return zalloc(sizeof(struct evsel_trace)); 302 } 303 304 static void evsel_trace__delete(struct evsel_trace *et) 305 { 306 if (et == NULL) 307 return; 308 309 zfree(&et->fmt); 310 free(et); 311 } 312 313 /* 314 * Used with raw_syscalls:sys_{enter,exit} and with the 315 * syscalls:sys_{enter,exit}_SYSCALL tracepoints 316 */ 317 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) 318 { 319 struct evsel_trace *et = evsel->priv; 320 321 return &et->sc; 322 } 323 324 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) 325 { 326 if (evsel->priv == NULL) { 327 evsel->priv = evsel_trace__new(); 328 if (evsel->priv == NULL) 329 return NULL; 330 } 331 332 return __evsel__syscall_tp(evsel); 333 } 334 335 /* 336 * Used with all the other tracepoints. 337 */ 338 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) 339 { 340 struct evsel_trace *et = evsel->priv; 341 342 return et->fmt; 343 } 344 345 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) 346 { 347 struct evsel_trace *et = evsel->priv; 348 349 if (evsel->priv == NULL) { 350 et = evsel->priv = evsel_trace__new(); 351 352 if (et == NULL) 353 return NULL; 354 } 355 356 if (et->fmt == NULL) { 357 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); 358 if (et->fmt == NULL) 359 goto out_delete; 360 } 361 362 return __evsel__syscall_arg_fmt(evsel); 363 364 out_delete: 365 evsel_trace__delete(evsel->priv); 366 evsel->priv = NULL; 367 return NULL; 368 } 369 370 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) 371 { 372 struct tep_format_field *format_field = evsel__field(evsel, name); 373 374 if (format_field == NULL) 375 return -1; 376 377 return tp_field__init_uint(field, format_field, evsel->needs_swap); 378 } 379 380 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 381 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 382 evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 383 384 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) 385 { 386 struct tep_format_field *format_field = evsel__field(evsel, name); 387 388 if (format_field == NULL) 389 return -1; 390 391 return tp_field__init_ptr(field, format_field); 392 } 393 394 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 395 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 396 evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 397 398 static void evsel__delete_priv(struct evsel *evsel) 399 { 400 zfree(&evsel->priv); 401 evsel__delete(evsel); 402 } 403 404 static int evsel__init_syscall_tp(struct evsel *evsel) 405 { 406 struct syscall_tp *sc = evsel__syscall_tp(evsel); 407 408 if (sc != NULL) { 409 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 410 evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 411 return -ENOENT; 412 return 0; 413 } 414 415 return -ENOMEM; 416 } 417 418 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 419 { 420 struct syscall_tp *sc = evsel__syscall_tp(evsel); 421 422 if (sc != NULL) { 423 struct tep_format_field *syscall_id = evsel__field(tp, "id"); 424 if (syscall_id == NULL) 425 syscall_id = evsel__field(tp, "__syscall_nr"); 426 if (syscall_id == NULL || 427 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 428 return -EINVAL; 429 430 return 0; 431 } 432 433 return -ENOMEM; 434 } 435 436 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 437 { 438 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 439 440 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 441 } 442 443 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 444 { 445 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 446 447 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 448 } 449 450 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 451 { 452 if (evsel__syscall_tp(evsel) != NULL) { 453 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 454 return -ENOENT; 455 456 evsel->handler = handler; 457 return 0; 458 } 459 460 return -ENOMEM; 461 } 462 463 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 464 { 465 struct evsel *evsel = evsel__newtp("raw_syscalls", direction); 466 467 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 468 if (IS_ERR(evsel)) 469 evsel = evsel__newtp("syscalls", direction); 470 471 if (IS_ERR(evsel)) 472 return NULL; 473 474 if (evsel__init_raw_syscall_tp(evsel, handler)) 475 goto out_delete; 476 477 return evsel; 478 479 out_delete: 480 evsel__delete_priv(evsel); 481 return NULL; 482 } 483 484 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 485 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 486 fields->name.integer(&fields->name, sample); }) 487 488 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 489 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 490 fields->name.pointer(&fields->name, sample); }) 491 492 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) 493 { 494 int idx = val - sa->offset; 495 496 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 497 size_t printed = scnprintf(bf, size, intfmt, val); 498 if (show_suffix) 499 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 500 return printed; 501 } 502 503 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); 504 } 505 506 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 507 { 508 int idx = val - sa->offset; 509 510 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 511 size_t printed = scnprintf(bf, size, intfmt, val); 512 if (show_prefix) 513 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 514 return printed; 515 } 516 517 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 518 } 519 520 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 521 const char *intfmt, 522 struct syscall_arg *arg) 523 { 524 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 525 } 526 527 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 528 struct syscall_arg *arg) 529 { 530 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 531 } 532 533 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 534 535 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 536 { 537 return strarray__strtoul(arg->parm, bf, size, ret); 538 } 539 540 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 541 { 542 return strarray__strtoul_flags(arg->parm, bf, size, ret); 543 } 544 545 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 546 { 547 return strarrays__strtoul(arg->parm, bf, size, ret); 548 } 549 550 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 551 { 552 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 553 } 554 555 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 556 { 557 size_t printed; 558 int i; 559 560 for (i = 0; i < sas->nr_entries; ++i) { 561 struct strarray *sa = sas->entries[i]; 562 int idx = val - sa->offset; 563 564 if (idx >= 0 && idx < sa->nr_entries) { 565 if (sa->entries[idx] == NULL) 566 break; 567 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 568 } 569 } 570 571 printed = scnprintf(bf, size, intfmt, val); 572 if (show_prefix) 573 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 574 return printed; 575 } 576 577 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) 578 { 579 int i; 580 581 for (i = 0; i < sa->nr_entries; ++i) { 582 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { 583 *ret = sa->offset + i; 584 return true; 585 } 586 } 587 588 return false; 589 } 590 591 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) 592 { 593 u64 val = 0; 594 char *tok = bf, *sep, *end; 595 596 *ret = 0; 597 598 while (size != 0) { 599 int toklen = size; 600 601 sep = memchr(tok, '|', size); 602 if (sep != NULL) { 603 size -= sep - tok + 1; 604 605 end = sep - 1; 606 while (end > tok && isspace(*end)) 607 --end; 608 609 toklen = end - tok + 1; 610 } 611 612 while (isspace(*tok)) 613 ++tok; 614 615 if (isalpha(*tok) || *tok == '_') { 616 if (!strarray__strtoul(sa, tok, toklen, &val)) 617 return false; 618 } else { 619 bool is_hexa = tok[0] == 0 && (tok[1] = 'x' || tok[1] == 'X'); 620 621 val = strtoul(tok, NULL, is_hexa ? 16 : 0); 622 } 623 624 *ret |= (1 << (val - 1)); 625 626 if (sep == NULL) 627 break; 628 tok = sep + 1; 629 } 630 631 return true; 632 } 633 634 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) 635 { 636 int i; 637 638 for (i = 0; i < sas->nr_entries; ++i) { 639 struct strarray *sa = sas->entries[i]; 640 641 if (strarray__strtoul(sa, bf, size, ret)) 642 return true; 643 } 644 645 return false; 646 } 647 648 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 649 struct syscall_arg *arg) 650 { 651 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 652 } 653 654 #ifndef AT_FDCWD 655 #define AT_FDCWD -100 656 #endif 657 658 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 659 struct syscall_arg *arg) 660 { 661 int fd = arg->val; 662 const char *prefix = "AT_FD"; 663 664 if (fd == AT_FDCWD) 665 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 666 667 return syscall_arg__scnprintf_fd(bf, size, arg); 668 } 669 670 #define SCA_FDAT syscall_arg__scnprintf_fd_at 671 672 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 673 struct syscall_arg *arg); 674 675 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 676 677 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 678 { 679 return scnprintf(bf, size, "%#lx", arg->val); 680 } 681 682 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 683 { 684 if (arg->val == 0) 685 return scnprintf(bf, size, "NULL"); 686 return syscall_arg__scnprintf_hex(bf, size, arg); 687 } 688 689 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 690 { 691 return scnprintf(bf, size, "%d", arg->val); 692 } 693 694 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 695 { 696 return scnprintf(bf, size, "%ld", arg->val); 697 } 698 699 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) 700 { 701 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can 702 // fill missing comms using thread__set_comm()... 703 // here or in a special syscall_arg__scnprintf_pid_sched_tp... 704 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); 705 } 706 707 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array 708 709 static const char *bpf_cmd[] = { 710 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 711 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", 712 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", 713 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", 714 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", 715 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", 716 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", 717 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", 718 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", 719 "LINK_DETACH", "PROG_BIND_MAP", 720 }; 721 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 722 723 static const char *fsmount_flags[] = { 724 [1] = "CLOEXEC", 725 }; 726 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 727 728 #include "trace/beauty/generated/fsconfig_arrays.c" 729 730 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 731 732 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 733 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 734 735 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 736 static DEFINE_STRARRAY(itimers, "ITIMER_"); 737 738 static const char *keyctl_options[] = { 739 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 740 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 741 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 742 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 743 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 744 }; 745 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 746 747 static const char *whences[] = { "SET", "CUR", "END", 748 #ifdef SEEK_DATA 749 "DATA", 750 #endif 751 #ifdef SEEK_HOLE 752 "HOLE", 753 #endif 754 }; 755 static DEFINE_STRARRAY(whences, "SEEK_"); 756 757 static const char *fcntl_cmds[] = { 758 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 759 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 760 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 761 "GETOWNER_UIDS", 762 }; 763 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 764 765 static const char *fcntl_linux_specific_cmds[] = { 766 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 767 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 768 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 769 }; 770 771 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 772 773 static struct strarray *fcntl_cmds_arrays[] = { 774 &strarray__fcntl_cmds, 775 &strarray__fcntl_linux_specific_cmds, 776 }; 777 778 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 779 780 static const char *rlimit_resources[] = { 781 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 782 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 783 "RTTIME", 784 }; 785 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 786 787 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 788 static DEFINE_STRARRAY(sighow, "SIG_"); 789 790 static const char *clockid[] = { 791 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 792 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 793 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 794 }; 795 static DEFINE_STRARRAY(clockid, "CLOCK_"); 796 797 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 798 struct syscall_arg *arg) 799 { 800 bool show_prefix = arg->show_string_prefix; 801 const char *suffix = "_OK"; 802 size_t printed = 0; 803 int mode = arg->val; 804 805 if (mode == F_OK) /* 0 */ 806 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 807 #define P_MODE(n) \ 808 if (mode & n##_OK) { \ 809 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 810 mode &= ~n##_OK; \ 811 } 812 813 P_MODE(R); 814 P_MODE(W); 815 P_MODE(X); 816 #undef P_MODE 817 818 if (mode) 819 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 820 821 return printed; 822 } 823 824 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 825 826 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 827 struct syscall_arg *arg); 828 829 #define SCA_FILENAME syscall_arg__scnprintf_filename 830 831 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 832 struct syscall_arg *arg) 833 { 834 bool show_prefix = arg->show_string_prefix; 835 const char *prefix = "O_"; 836 int printed = 0, flags = arg->val; 837 838 #define P_FLAG(n) \ 839 if (flags & O_##n) { \ 840 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 841 flags &= ~O_##n; \ 842 } 843 844 P_FLAG(CLOEXEC); 845 P_FLAG(NONBLOCK); 846 #undef P_FLAG 847 848 if (flags) 849 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 850 851 return printed; 852 } 853 854 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 855 856 #ifndef GRND_NONBLOCK 857 #define GRND_NONBLOCK 0x0001 858 #endif 859 #ifndef GRND_RANDOM 860 #define GRND_RANDOM 0x0002 861 #endif 862 863 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 864 struct syscall_arg *arg) 865 { 866 bool show_prefix = arg->show_string_prefix; 867 const char *prefix = "GRND_"; 868 int printed = 0, flags = arg->val; 869 870 #define P_FLAG(n) \ 871 if (flags & GRND_##n) { \ 872 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 873 flags &= ~GRND_##n; \ 874 } 875 876 P_FLAG(RANDOM); 877 P_FLAG(NONBLOCK); 878 #undef P_FLAG 879 880 if (flags) 881 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 882 883 return printed; 884 } 885 886 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 887 888 #define STRARRAY(name, array) \ 889 { .scnprintf = SCA_STRARRAY, \ 890 .strtoul = STUL_STRARRAY, \ 891 .parm = &strarray__##array, } 892 893 #define STRARRAY_FLAGS(name, array) \ 894 { .scnprintf = SCA_STRARRAY_FLAGS, \ 895 .strtoul = STUL_STRARRAY_FLAGS, \ 896 .parm = &strarray__##array, } 897 898 #include "trace/beauty/arch_errno_names.c" 899 #include "trace/beauty/eventfd.c" 900 #include "trace/beauty/futex_op.c" 901 #include "trace/beauty/futex_val3.c" 902 #include "trace/beauty/mmap.c" 903 #include "trace/beauty/mode_t.c" 904 #include "trace/beauty/msg_flags.c" 905 #include "trace/beauty/open_flags.c" 906 #include "trace/beauty/perf_event_open.c" 907 #include "trace/beauty/pid.c" 908 #include "trace/beauty/sched_policy.c" 909 #include "trace/beauty/seccomp.c" 910 #include "trace/beauty/signum.c" 911 #include "trace/beauty/socket_type.c" 912 #include "trace/beauty/waitid_options.c" 913 914 static struct syscall_fmt syscall_fmts[] = { 915 { .name = "access", 916 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 917 { .name = "arch_prctl", 918 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 919 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 920 { .name = "bind", 921 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 922 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 923 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 924 { .name = "bpf", 925 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 926 { .name = "brk", .hexret = true, 927 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 928 { .name = "clock_gettime", 929 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 930 { .name = "clone", .errpid = true, .nr_args = 5, 931 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 932 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 933 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 934 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 935 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 936 { .name = "close", 937 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 938 { .name = "connect", 939 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 940 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 941 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 942 { .name = "epoll_ctl", 943 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 944 { .name = "eventfd2", 945 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 946 { .name = "fchmodat", 947 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 948 { .name = "fchownat", 949 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 950 { .name = "fcntl", 951 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 952 .strtoul = STUL_STRARRAYS, 953 .parm = &strarrays__fcntl_cmds_arrays, 954 .show_zero = true, }, 955 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 956 { .name = "flock", 957 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 958 { .name = "fsconfig", 959 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 960 { .name = "fsmount", 961 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 962 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 963 { .name = "fspick", 964 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 965 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 966 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 967 { .name = "fstat", .alias = "newfstat", }, 968 { .name = "fstatat", .alias = "newfstatat", }, 969 { .name = "futex", 970 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 971 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 972 { .name = "futimesat", 973 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 974 { .name = "getitimer", 975 .arg = { [0] = STRARRAY(which, itimers), }, }, 976 { .name = "getpid", .errpid = true, }, 977 { .name = "getpgid", .errpid = true, }, 978 { .name = "getppid", .errpid = true, }, 979 { .name = "getrandom", 980 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 981 { .name = "getrlimit", 982 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 983 { .name = "getsockopt", 984 .arg = { [1] = STRARRAY(level, socket_level), }, }, 985 { .name = "gettid", .errpid = true, }, 986 { .name = "ioctl", 987 .arg = { 988 #if defined(__i386__) || defined(__x86_64__) 989 /* 990 * FIXME: Make this available to all arches. 991 */ 992 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 993 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 994 #else 995 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 996 #endif 997 { .name = "kcmp", .nr_args = 5, 998 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 999 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1000 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1001 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1002 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1003 { .name = "keyctl", 1004 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1005 { .name = "kill", 1006 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1007 { .name = "linkat", 1008 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1009 { .name = "lseek", 1010 .arg = { [2] = STRARRAY(whence, whences), }, }, 1011 { .name = "lstat", .alias = "newlstat", }, 1012 { .name = "madvise", 1013 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1014 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1015 { .name = "mkdirat", 1016 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1017 { .name = "mknodat", 1018 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1019 { .name = "mmap", .hexret = true, 1020 /* The standard mmap maps to old_mmap on s390x */ 1021 #if defined(__s390x__) 1022 .alias = "old_mmap", 1023 #endif 1024 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1025 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1026 .strtoul = STUL_STRARRAY_FLAGS, 1027 .parm = &strarray__mmap_flags, }, 1028 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1029 { .name = "mount", 1030 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1031 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1032 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1033 { .name = "move_mount", 1034 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1035 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1036 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1037 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1038 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1039 { .name = "mprotect", 1040 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1041 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 1042 { .name = "mq_unlink", 1043 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1044 { .name = "mremap", .hexret = true, 1045 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1046 { .name = "name_to_handle_at", 1047 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1048 { .name = "newfstatat", 1049 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1050 { .name = "open", 1051 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1052 { .name = "open_by_handle_at", 1053 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1054 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1055 { .name = "openat", 1056 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1057 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1058 { .name = "perf_event_open", 1059 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1060 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1061 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1062 { .name = "pipe2", 1063 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1064 { .name = "pkey_alloc", 1065 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1066 { .name = "pkey_free", 1067 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1068 { .name = "pkey_mprotect", 1069 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1070 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1071 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1072 { .name = "poll", .timeout = true, }, 1073 { .name = "ppoll", .timeout = true, }, 1074 { .name = "prctl", 1075 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1076 .strtoul = STUL_STRARRAY, 1077 .parm = &strarray__prctl_options, }, 1078 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1079 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1080 { .name = "pread", .alias = "pread64", }, 1081 { .name = "preadv", .alias = "pread", }, 1082 { .name = "prlimit64", 1083 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1084 { .name = "pwrite", .alias = "pwrite64", }, 1085 { .name = "readlinkat", 1086 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1087 { .name = "recvfrom", 1088 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1089 { .name = "recvmmsg", 1090 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1091 { .name = "recvmsg", 1092 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1093 { .name = "renameat", 1094 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1095 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1096 { .name = "renameat2", 1097 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1098 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1099 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1100 { .name = "rt_sigaction", 1101 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1102 { .name = "rt_sigprocmask", 1103 .arg = { [0] = STRARRAY(how, sighow), }, }, 1104 { .name = "rt_sigqueueinfo", 1105 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1106 { .name = "rt_tgsigqueueinfo", 1107 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1108 { .name = "sched_setscheduler", 1109 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1110 { .name = "seccomp", 1111 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1112 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1113 { .name = "select", .timeout = true, }, 1114 { .name = "sendfile", .alias = "sendfile64", }, 1115 { .name = "sendmmsg", 1116 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1117 { .name = "sendmsg", 1118 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1119 { .name = "sendto", 1120 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1121 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1122 { .name = "set_tid_address", .errpid = true, }, 1123 { .name = "setitimer", 1124 .arg = { [0] = STRARRAY(which, itimers), }, }, 1125 { .name = "setrlimit", 1126 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1127 { .name = "setsockopt", 1128 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1129 { .name = "socket", 1130 .arg = { [0] = STRARRAY(family, socket_families), 1131 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1132 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1133 { .name = "socketpair", 1134 .arg = { [0] = STRARRAY(family, socket_families), 1135 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1136 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1137 { .name = "stat", .alias = "newstat", }, 1138 { .name = "statx", 1139 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1140 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 1141 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1142 { .name = "swapoff", 1143 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1144 { .name = "swapon", 1145 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1146 { .name = "symlinkat", 1147 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1148 { .name = "sync_file_range", 1149 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1150 { .name = "tgkill", 1151 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1152 { .name = "tkill", 1153 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1154 { .name = "umount2", .alias = "umount", 1155 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1156 { .name = "uname", .alias = "newuname", }, 1157 { .name = "unlinkat", 1158 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1159 { .name = "utimensat", 1160 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1161 { .name = "wait4", .errpid = true, 1162 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1163 { .name = "waitid", .errpid = true, 1164 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1165 }; 1166 1167 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1168 { 1169 const struct syscall_fmt *fmt = fmtp; 1170 return strcmp(name, fmt->name); 1171 } 1172 1173 static struct syscall_fmt *__syscall_fmt__find(struct syscall_fmt *fmts, const int nmemb, const char *name) 1174 { 1175 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1176 } 1177 1178 static struct syscall_fmt *syscall_fmt__find(const char *name) 1179 { 1180 const int nmemb = ARRAY_SIZE(syscall_fmts); 1181 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1182 } 1183 1184 static struct syscall_fmt *__syscall_fmt__find_by_alias(struct syscall_fmt *fmts, const int nmemb, const char *alias) 1185 { 1186 int i; 1187 1188 for (i = 0; i < nmemb; ++i) { 1189 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1190 return &fmts[i]; 1191 } 1192 1193 return NULL; 1194 } 1195 1196 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1197 { 1198 const int nmemb = ARRAY_SIZE(syscall_fmts); 1199 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1200 } 1201 1202 /* 1203 * is_exit: is this "exit" or "exit_group"? 1204 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1205 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1206 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1207 */ 1208 struct syscall { 1209 struct tep_event *tp_format; 1210 int nr_args; 1211 int args_size; 1212 struct { 1213 struct bpf_program *sys_enter, 1214 *sys_exit; 1215 } bpf_prog; 1216 bool is_exit; 1217 bool is_open; 1218 bool nonexistent; 1219 struct tep_format_field *args; 1220 const char *name; 1221 struct syscall_fmt *fmt; 1222 struct syscall_arg_fmt *arg_fmt; 1223 }; 1224 1225 /* 1226 * Must match what is in the BPF program: 1227 * 1228 * tools/perf/examples/bpf/augmented_raw_syscalls.c 1229 */ 1230 struct bpf_map_syscall_entry { 1231 bool enabled; 1232 u16 string_args_len[6]; 1233 }; 1234 1235 /* 1236 * We need to have this 'calculated' boolean because in some cases we really 1237 * don't know what is the duration of a syscall, for instance, when we start 1238 * a session and some threads are waiting for a syscall to finish, say 'poll', 1239 * in which case all we can do is to print "( ? ) for duration and for the 1240 * start timestamp. 1241 */ 1242 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1243 { 1244 double duration = (double)t / NSEC_PER_MSEC; 1245 size_t printed = fprintf(fp, "("); 1246 1247 if (!calculated) 1248 printed += fprintf(fp, " "); 1249 else if (duration >= 1.0) 1250 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1251 else if (duration >= 0.01) 1252 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1253 else 1254 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1255 return printed + fprintf(fp, "): "); 1256 } 1257 1258 /** 1259 * filename.ptr: The filename char pointer that will be vfs_getname'd 1260 * filename.entry_str_pos: Where to insert the string translated from 1261 * filename.ptr by the vfs_getname tracepoint/kprobe. 1262 * ret_scnprintf: syscall args may set this to a different syscall return 1263 * formatter, for instance, fcntl may return fds, file flags, etc. 1264 */ 1265 struct thread_trace { 1266 u64 entry_time; 1267 bool entry_pending; 1268 unsigned long nr_events; 1269 unsigned long pfmaj, pfmin; 1270 char *entry_str; 1271 double runtime_ms; 1272 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1273 struct { 1274 unsigned long ptr; 1275 short int entry_str_pos; 1276 bool pending_open; 1277 unsigned int namelen; 1278 char *name; 1279 } filename; 1280 struct { 1281 int max; 1282 struct file *table; 1283 } files; 1284 1285 struct intlist *syscall_stats; 1286 }; 1287 1288 static struct thread_trace *thread_trace__new(void) 1289 { 1290 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1291 1292 if (ttrace) { 1293 ttrace->files.max = -1; 1294 ttrace->syscall_stats = intlist__new(NULL); 1295 } 1296 1297 return ttrace; 1298 } 1299 1300 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1301 { 1302 struct thread_trace *ttrace; 1303 1304 if (thread == NULL) 1305 goto fail; 1306 1307 if (thread__priv(thread) == NULL) 1308 thread__set_priv(thread, thread_trace__new()); 1309 1310 if (thread__priv(thread) == NULL) 1311 goto fail; 1312 1313 ttrace = thread__priv(thread); 1314 ++ttrace->nr_events; 1315 1316 return ttrace; 1317 fail: 1318 color_fprintf(fp, PERF_COLOR_RED, 1319 "WARNING: not enough memory, dropping samples!\n"); 1320 return NULL; 1321 } 1322 1323 1324 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1325 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1326 { 1327 struct thread_trace *ttrace = thread__priv(arg->thread); 1328 1329 ttrace->ret_scnprintf = ret_scnprintf; 1330 } 1331 1332 #define TRACE_PFMAJ (1 << 0) 1333 #define TRACE_PFMIN (1 << 1) 1334 1335 static const size_t trace__entry_str_size = 2048; 1336 1337 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1338 { 1339 if (fd < 0) 1340 return NULL; 1341 1342 if (fd > ttrace->files.max) { 1343 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1344 1345 if (nfiles == NULL) 1346 return NULL; 1347 1348 if (ttrace->files.max != -1) { 1349 memset(nfiles + ttrace->files.max + 1, 0, 1350 (fd - ttrace->files.max) * sizeof(struct file)); 1351 } else { 1352 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1353 } 1354 1355 ttrace->files.table = nfiles; 1356 ttrace->files.max = fd; 1357 } 1358 1359 return ttrace->files.table + fd; 1360 } 1361 1362 struct file *thread__files_entry(struct thread *thread, int fd) 1363 { 1364 return thread_trace__files_entry(thread__priv(thread), fd); 1365 } 1366 1367 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1368 { 1369 struct thread_trace *ttrace = thread__priv(thread); 1370 struct file *file = thread_trace__files_entry(ttrace, fd); 1371 1372 if (file != NULL) { 1373 struct stat st; 1374 if (stat(pathname, &st) == 0) 1375 file->dev_maj = major(st.st_rdev); 1376 file->pathname = strdup(pathname); 1377 if (file->pathname) 1378 return 0; 1379 } 1380 1381 return -1; 1382 } 1383 1384 static int thread__read_fd_path(struct thread *thread, int fd) 1385 { 1386 char linkname[PATH_MAX], pathname[PATH_MAX]; 1387 struct stat st; 1388 int ret; 1389 1390 if (thread->pid_ == thread->tid) { 1391 scnprintf(linkname, sizeof(linkname), 1392 "/proc/%d/fd/%d", thread->pid_, fd); 1393 } else { 1394 scnprintf(linkname, sizeof(linkname), 1395 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1396 } 1397 1398 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1399 return -1; 1400 1401 ret = readlink(linkname, pathname, sizeof(pathname)); 1402 1403 if (ret < 0 || ret > st.st_size) 1404 return -1; 1405 1406 pathname[ret] = '\0'; 1407 return trace__set_fd_pathname(thread, fd, pathname); 1408 } 1409 1410 static const char *thread__fd_path(struct thread *thread, int fd, 1411 struct trace *trace) 1412 { 1413 struct thread_trace *ttrace = thread__priv(thread); 1414 1415 if (ttrace == NULL || trace->fd_path_disabled) 1416 return NULL; 1417 1418 if (fd < 0) 1419 return NULL; 1420 1421 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1422 if (!trace->live) 1423 return NULL; 1424 ++trace->stats.proc_getname; 1425 if (thread__read_fd_path(thread, fd)) 1426 return NULL; 1427 } 1428 1429 return ttrace->files.table[fd].pathname; 1430 } 1431 1432 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1433 { 1434 int fd = arg->val; 1435 size_t printed = scnprintf(bf, size, "%d", fd); 1436 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1437 1438 if (path) 1439 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1440 1441 return printed; 1442 } 1443 1444 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1445 { 1446 size_t printed = scnprintf(bf, size, "%d", fd); 1447 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1448 1449 if (thread) { 1450 const char *path = thread__fd_path(thread, fd, trace); 1451 1452 if (path) 1453 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1454 1455 thread__put(thread); 1456 } 1457 1458 return printed; 1459 } 1460 1461 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1462 struct syscall_arg *arg) 1463 { 1464 int fd = arg->val; 1465 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1466 struct thread_trace *ttrace = thread__priv(arg->thread); 1467 1468 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1469 zfree(&ttrace->files.table[fd].pathname); 1470 1471 return printed; 1472 } 1473 1474 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1475 unsigned long ptr) 1476 { 1477 struct thread_trace *ttrace = thread__priv(thread); 1478 1479 ttrace->filename.ptr = ptr; 1480 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1481 } 1482 1483 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1484 { 1485 struct augmented_arg *augmented_arg = arg->augmented.args; 1486 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1487 /* 1488 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1489 * we would have two strings, each prefixed by its size. 1490 */ 1491 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1492 1493 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1494 arg->augmented.size -= consumed; 1495 1496 return printed; 1497 } 1498 1499 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1500 struct syscall_arg *arg) 1501 { 1502 unsigned long ptr = arg->val; 1503 1504 if (arg->augmented.args) 1505 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1506 1507 if (!arg->trace->vfs_getname) 1508 return scnprintf(bf, size, "%#x", ptr); 1509 1510 thread__set_filename_pos(arg->thread, bf, ptr); 1511 return 0; 1512 } 1513 1514 static bool trace__filter_duration(struct trace *trace, double t) 1515 { 1516 return t < (trace->duration_filter * NSEC_PER_MSEC); 1517 } 1518 1519 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1520 { 1521 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1522 1523 return fprintf(fp, "%10.3f ", ts); 1524 } 1525 1526 /* 1527 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1528 * using ttrace->entry_time for a thread that receives a sys_exit without 1529 * first having received a sys_enter ("poll" issued before tracing session 1530 * starts, lost sys_enter exit due to ring buffer overflow). 1531 */ 1532 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1533 { 1534 if (tstamp > 0) 1535 return __trace__fprintf_tstamp(trace, tstamp, fp); 1536 1537 return fprintf(fp, " ? "); 1538 } 1539 1540 static pid_t workload_pid = -1; 1541 static bool done = false; 1542 static bool interrupted = false; 1543 1544 static void sighandler_interrupt(int sig __maybe_unused) 1545 { 1546 done = interrupted = true; 1547 } 1548 1549 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1550 void *context __maybe_unused) 1551 { 1552 if (info->si_pid == workload_pid) 1553 done = true; 1554 } 1555 1556 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1557 { 1558 size_t printed = 0; 1559 1560 if (trace->multiple_threads) { 1561 if (trace->show_comm) 1562 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1563 printed += fprintf(fp, "%d ", thread->tid); 1564 } 1565 1566 return printed; 1567 } 1568 1569 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1570 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1571 { 1572 size_t printed = 0; 1573 1574 if (trace->show_tstamp) 1575 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1576 if (trace->show_duration) 1577 printed += fprintf_duration(duration, duration_calculated, fp); 1578 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1579 } 1580 1581 static int trace__process_event(struct trace *trace, struct machine *machine, 1582 union perf_event *event, struct perf_sample *sample) 1583 { 1584 int ret = 0; 1585 1586 switch (event->header.type) { 1587 case PERF_RECORD_LOST: 1588 color_fprintf(trace->output, PERF_COLOR_RED, 1589 "LOST %" PRIu64 " events!\n", event->lost.lost); 1590 ret = machine__process_lost_event(machine, event, sample); 1591 break; 1592 default: 1593 ret = machine__process_event(machine, event, sample); 1594 break; 1595 } 1596 1597 return ret; 1598 } 1599 1600 static int trace__tool_process(struct perf_tool *tool, 1601 union perf_event *event, 1602 struct perf_sample *sample, 1603 struct machine *machine) 1604 { 1605 struct trace *trace = container_of(tool, struct trace, tool); 1606 return trace__process_event(trace, machine, event, sample); 1607 } 1608 1609 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1610 { 1611 struct machine *machine = vmachine; 1612 1613 if (machine->kptr_restrict_warned) 1614 return NULL; 1615 1616 if (symbol_conf.kptr_restrict) { 1617 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1618 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1619 "Kernel samples will not be resolved.\n"); 1620 machine->kptr_restrict_warned = true; 1621 return NULL; 1622 } 1623 1624 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1625 } 1626 1627 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1628 { 1629 int err = symbol__init(NULL); 1630 1631 if (err) 1632 return err; 1633 1634 trace->host = machine__new_host(); 1635 if (trace->host == NULL) 1636 return -ENOMEM; 1637 1638 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1639 if (err < 0) 1640 goto out; 1641 1642 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1643 evlist->core.threads, trace__tool_process, 1644 true, false, 1); 1645 out: 1646 if (err) 1647 symbol__exit(); 1648 1649 return err; 1650 } 1651 1652 static void trace__symbols__exit(struct trace *trace) 1653 { 1654 machine__exit(trace->host); 1655 trace->host = NULL; 1656 1657 symbol__exit(); 1658 } 1659 1660 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1661 { 1662 int idx; 1663 1664 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1665 nr_args = sc->fmt->nr_args; 1666 1667 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1668 if (sc->arg_fmt == NULL) 1669 return -1; 1670 1671 for (idx = 0; idx < nr_args; ++idx) { 1672 if (sc->fmt) 1673 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1674 } 1675 1676 sc->nr_args = nr_args; 1677 return 0; 1678 } 1679 1680 static struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1681 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1682 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1683 }; 1684 1685 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1686 { 1687 const struct syscall_arg_fmt *fmt = fmtp; 1688 return strcmp(name, fmt->name); 1689 } 1690 1691 static struct syscall_arg_fmt * 1692 __syscall_arg_fmt__find_by_name(struct syscall_arg_fmt *fmts, const int nmemb, const char *name) 1693 { 1694 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1695 } 1696 1697 static struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1698 { 1699 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1700 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1701 } 1702 1703 static struct tep_format_field * 1704 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1705 { 1706 struct tep_format_field *last_field = NULL; 1707 int len; 1708 1709 for (; field; field = field->next, ++arg) { 1710 last_field = field; 1711 1712 if (arg->scnprintf) 1713 continue; 1714 1715 len = strlen(field->name); 1716 1717 if (strcmp(field->type, "const char *") == 0 && 1718 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1719 strstr(field->name, "path") != NULL)) 1720 arg->scnprintf = SCA_FILENAME; 1721 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1722 arg->scnprintf = SCA_PTR; 1723 else if (strcmp(field->type, "pid_t") == 0) 1724 arg->scnprintf = SCA_PID; 1725 else if (strcmp(field->type, "umode_t") == 0) 1726 arg->scnprintf = SCA_MODE_T; 1727 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1728 arg->scnprintf = SCA_CHAR_ARRAY; 1729 arg->nr_entries = field->arraylen; 1730 } else if ((strcmp(field->type, "int") == 0 || 1731 strcmp(field->type, "unsigned int") == 0 || 1732 strcmp(field->type, "long") == 0) && 1733 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1734 /* 1735 * /sys/kernel/tracing/events/syscalls/sys_enter* 1736 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1737 * 65 int 1738 * 23 unsigned int 1739 * 7 unsigned long 1740 */ 1741 arg->scnprintf = SCA_FD; 1742 } else { 1743 struct syscall_arg_fmt *fmt = syscall_arg_fmt__find_by_name(field->name); 1744 1745 if (fmt) { 1746 arg->scnprintf = fmt->scnprintf; 1747 arg->strtoul = fmt->strtoul; 1748 } 1749 } 1750 } 1751 1752 return last_field; 1753 } 1754 1755 static int syscall__set_arg_fmts(struct syscall *sc) 1756 { 1757 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1758 1759 if (last_field) 1760 sc->args_size = last_field->offset + last_field->size; 1761 1762 return 0; 1763 } 1764 1765 static int trace__read_syscall_info(struct trace *trace, int id) 1766 { 1767 char tp_name[128]; 1768 struct syscall *sc; 1769 const char *name = syscalltbl__name(trace->sctbl, id); 1770 1771 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1772 if (trace->syscalls.table == NULL) { 1773 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1774 if (trace->syscalls.table == NULL) 1775 return -ENOMEM; 1776 } 1777 #else 1778 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1779 // When using libaudit we don't know beforehand what is the max syscall id 1780 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1781 1782 if (table == NULL) 1783 return -ENOMEM; 1784 1785 // Need to memset from offset 0 and +1 members if brand new 1786 if (trace->syscalls.table == NULL) 1787 memset(table, 0, (id + 1) * sizeof(*sc)); 1788 else 1789 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1790 1791 trace->syscalls.table = table; 1792 trace->sctbl->syscalls.max_id = id; 1793 } 1794 #endif 1795 sc = trace->syscalls.table + id; 1796 if (sc->nonexistent) 1797 return 0; 1798 1799 if (name == NULL) { 1800 sc->nonexistent = true; 1801 return 0; 1802 } 1803 1804 sc->name = name; 1805 sc->fmt = syscall_fmt__find(sc->name); 1806 1807 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1808 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1809 1810 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1811 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1812 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1813 } 1814 1815 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1816 return -ENOMEM; 1817 1818 if (IS_ERR(sc->tp_format)) 1819 return PTR_ERR(sc->tp_format); 1820 1821 sc->args = sc->tp_format->format.fields; 1822 /* 1823 * We need to check and discard the first variable '__syscall_nr' 1824 * or 'nr' that mean the syscall number. It is needless here. 1825 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1826 */ 1827 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1828 sc->args = sc->args->next; 1829 --sc->nr_args; 1830 } 1831 1832 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1833 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1834 1835 return syscall__set_arg_fmts(sc); 1836 } 1837 1838 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1839 { 1840 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1841 1842 if (fmt != NULL) { 1843 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1844 return 0; 1845 } 1846 1847 return -ENOMEM; 1848 } 1849 1850 static int intcmp(const void *a, const void *b) 1851 { 1852 const int *one = a, *another = b; 1853 1854 return *one - *another; 1855 } 1856 1857 static int trace__validate_ev_qualifier(struct trace *trace) 1858 { 1859 int err = 0; 1860 bool printed_invalid_prefix = false; 1861 struct str_node *pos; 1862 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1863 1864 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1865 sizeof(trace->ev_qualifier_ids.entries[0])); 1866 1867 if (trace->ev_qualifier_ids.entries == NULL) { 1868 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1869 trace->output); 1870 err = -EINVAL; 1871 goto out; 1872 } 1873 1874 strlist__for_each_entry(pos, trace->ev_qualifier) { 1875 const char *sc = pos->s; 1876 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1877 1878 if (id < 0) { 1879 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1880 if (id >= 0) 1881 goto matches; 1882 1883 if (!printed_invalid_prefix) { 1884 pr_debug("Skipping unknown syscalls: "); 1885 printed_invalid_prefix = true; 1886 } else { 1887 pr_debug(", "); 1888 } 1889 1890 pr_debug("%s", sc); 1891 continue; 1892 } 1893 matches: 1894 trace->ev_qualifier_ids.entries[nr_used++] = id; 1895 if (match_next == -1) 1896 continue; 1897 1898 while (1) { 1899 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1900 if (id < 0) 1901 break; 1902 if (nr_allocated == nr_used) { 1903 void *entries; 1904 1905 nr_allocated += 8; 1906 entries = realloc(trace->ev_qualifier_ids.entries, 1907 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1908 if (entries == NULL) { 1909 err = -ENOMEM; 1910 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1911 goto out_free; 1912 } 1913 trace->ev_qualifier_ids.entries = entries; 1914 } 1915 trace->ev_qualifier_ids.entries[nr_used++] = id; 1916 } 1917 } 1918 1919 trace->ev_qualifier_ids.nr = nr_used; 1920 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1921 out: 1922 if (printed_invalid_prefix) 1923 pr_debug("\n"); 1924 return err; 1925 out_free: 1926 zfree(&trace->ev_qualifier_ids.entries); 1927 trace->ev_qualifier_ids.nr = 0; 1928 goto out; 1929 } 1930 1931 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1932 { 1933 bool in_ev_qualifier; 1934 1935 if (trace->ev_qualifier_ids.nr == 0) 1936 return true; 1937 1938 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1939 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1940 1941 if (in_ev_qualifier) 1942 return !trace->not_ev_qualifier; 1943 1944 return trace->not_ev_qualifier; 1945 } 1946 1947 /* 1948 * args is to be interpreted as a series of longs but we need to handle 1949 * 8-byte unaligned accesses. args points to raw_data within the event 1950 * and raw_data is guaranteed to be 8-byte unaligned because it is 1951 * preceded by raw_size which is a u32. So we need to copy args to a temp 1952 * variable to read it. Most notably this avoids extended load instructions 1953 * on unaligned addresses 1954 */ 1955 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1956 { 1957 unsigned long val; 1958 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1959 1960 memcpy(&val, p, sizeof(val)); 1961 return val; 1962 } 1963 1964 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1965 struct syscall_arg *arg) 1966 { 1967 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1968 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1969 1970 return scnprintf(bf, size, "arg%d: ", arg->idx); 1971 } 1972 1973 /* 1974 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1975 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1976 * in tools/perf/trace/beauty/mount_flags.c 1977 */ 1978 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 1979 { 1980 if (fmt && fmt->mask_val) 1981 return fmt->mask_val(arg, val); 1982 1983 return val; 1984 } 1985 1986 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 1987 struct syscall_arg *arg, unsigned long val) 1988 { 1989 if (fmt && fmt->scnprintf) { 1990 arg->val = val; 1991 if (fmt->parm) 1992 arg->parm = fmt->parm; 1993 return fmt->scnprintf(bf, size, arg); 1994 } 1995 return scnprintf(bf, size, "%ld", val); 1996 } 1997 1998 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1999 unsigned char *args, void *augmented_args, int augmented_args_size, 2000 struct trace *trace, struct thread *thread) 2001 { 2002 size_t printed = 0; 2003 unsigned long val; 2004 u8 bit = 1; 2005 struct syscall_arg arg = { 2006 .args = args, 2007 .augmented = { 2008 .size = augmented_args_size, 2009 .args = augmented_args, 2010 }, 2011 .idx = 0, 2012 .mask = 0, 2013 .trace = trace, 2014 .thread = thread, 2015 .show_string_prefix = trace->show_string_prefix, 2016 }; 2017 struct thread_trace *ttrace = thread__priv(thread); 2018 2019 /* 2020 * Things like fcntl will set this in its 'cmd' formatter to pick the 2021 * right formatter for the return value (an fd? file flags?), which is 2022 * not needed for syscalls that always return a given type, say an fd. 2023 */ 2024 ttrace->ret_scnprintf = NULL; 2025 2026 if (sc->args != NULL) { 2027 struct tep_format_field *field; 2028 2029 for (field = sc->args; field; 2030 field = field->next, ++arg.idx, bit <<= 1) { 2031 if (arg.mask & bit) 2032 continue; 2033 2034 arg.fmt = &sc->arg_fmt[arg.idx]; 2035 val = syscall_arg__val(&arg, arg.idx); 2036 /* 2037 * Some syscall args need some mask, most don't and 2038 * return val untouched. 2039 */ 2040 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2041 2042 /* 2043 * Suppress this argument if its value is zero and 2044 * and we don't have a string associated in an 2045 * strarray for it. 2046 */ 2047 if (val == 0 && 2048 !trace->show_zeros && 2049 !(sc->arg_fmt && 2050 (sc->arg_fmt[arg.idx].show_zero || 2051 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 2052 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 2053 sc->arg_fmt[arg.idx].parm)) 2054 continue; 2055 2056 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2057 2058 if (trace->show_arg_names) 2059 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2060 2061 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2062 bf + printed, size - printed, &arg, val); 2063 } 2064 } else if (IS_ERR(sc->tp_format)) { 2065 /* 2066 * If we managed to read the tracepoint /format file, then we 2067 * may end up not having any args, like with gettid(), so only 2068 * print the raw args when we didn't manage to read it. 2069 */ 2070 while (arg.idx < sc->nr_args) { 2071 if (arg.mask & bit) 2072 goto next_arg; 2073 val = syscall_arg__val(&arg, arg.idx); 2074 if (printed) 2075 printed += scnprintf(bf + printed, size - printed, ", "); 2076 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2077 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2078 next_arg: 2079 ++arg.idx; 2080 bit <<= 1; 2081 } 2082 } 2083 2084 return printed; 2085 } 2086 2087 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2088 union perf_event *event, 2089 struct perf_sample *sample); 2090 2091 static struct syscall *trace__syscall_info(struct trace *trace, 2092 struct evsel *evsel, int id) 2093 { 2094 int err = 0; 2095 2096 if (id < 0) { 2097 2098 /* 2099 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2100 * before that, leaving at a higher verbosity level till that is 2101 * explained. Reproduced with plain ftrace with: 2102 * 2103 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2104 * grep "NR -1 " /t/trace_pipe 2105 * 2106 * After generating some load on the machine. 2107 */ 2108 if (verbose > 1) { 2109 static u64 n; 2110 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2111 id, evsel__name(evsel), ++n); 2112 } 2113 return NULL; 2114 } 2115 2116 err = -EINVAL; 2117 2118 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2119 if (id > trace->sctbl->syscalls.max_id) { 2120 #else 2121 if (id >= trace->sctbl->syscalls.max_id) { 2122 /* 2123 * With libaudit we don't know beforehand what is the max_id, 2124 * so we let trace__read_syscall_info() figure that out as we 2125 * go on reading syscalls. 2126 */ 2127 err = trace__read_syscall_info(trace, id); 2128 if (err) 2129 #endif 2130 goto out_cant_read; 2131 } 2132 2133 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2134 (err = trace__read_syscall_info(trace, id)) != 0) 2135 goto out_cant_read; 2136 2137 if (trace->syscalls.table[id].name == NULL) { 2138 if (trace->syscalls.table[id].nonexistent) 2139 return NULL; 2140 goto out_cant_read; 2141 } 2142 2143 return &trace->syscalls.table[id]; 2144 2145 out_cant_read: 2146 if (verbose > 0) { 2147 char sbuf[STRERR_BUFSIZE]; 2148 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2149 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2150 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2151 fputs(" information\n", trace->output); 2152 } 2153 return NULL; 2154 } 2155 2156 struct syscall_stats { 2157 struct stats stats; 2158 u64 nr_failures; 2159 int max_errno; 2160 u32 *errnos; 2161 }; 2162 2163 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2164 int id, struct perf_sample *sample, long err, bool errno_summary) 2165 { 2166 struct int_node *inode; 2167 struct syscall_stats *stats; 2168 u64 duration = 0; 2169 2170 inode = intlist__findnew(ttrace->syscall_stats, id); 2171 if (inode == NULL) 2172 return; 2173 2174 stats = inode->priv; 2175 if (stats == NULL) { 2176 stats = malloc(sizeof(*stats)); 2177 if (stats == NULL) 2178 return; 2179 2180 stats->nr_failures = 0; 2181 stats->max_errno = 0; 2182 stats->errnos = NULL; 2183 init_stats(&stats->stats); 2184 inode->priv = stats; 2185 } 2186 2187 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2188 duration = sample->time - ttrace->entry_time; 2189 2190 update_stats(&stats->stats, duration); 2191 2192 if (err < 0) { 2193 ++stats->nr_failures; 2194 2195 if (!errno_summary) 2196 return; 2197 2198 err = -err; 2199 if (err > stats->max_errno) { 2200 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2201 2202 if (new_errnos) { 2203 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2204 } else { 2205 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2206 thread__comm_str(thread), thread->pid_, thread->tid); 2207 return; 2208 } 2209 2210 stats->errnos = new_errnos; 2211 stats->max_errno = err; 2212 } 2213 2214 ++stats->errnos[err - 1]; 2215 } 2216 } 2217 2218 static int trace__printf_interrupted_entry(struct trace *trace) 2219 { 2220 struct thread_trace *ttrace; 2221 size_t printed; 2222 int len; 2223 2224 if (trace->failure_only || trace->current == NULL) 2225 return 0; 2226 2227 ttrace = thread__priv(trace->current); 2228 2229 if (!ttrace->entry_pending) 2230 return 0; 2231 2232 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2233 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2234 2235 if (len < trace->args_alignment - 4) 2236 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2237 2238 printed += fprintf(trace->output, " ...\n"); 2239 2240 ttrace->entry_pending = false; 2241 ++trace->nr_events_printed; 2242 2243 return printed; 2244 } 2245 2246 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2247 struct perf_sample *sample, struct thread *thread) 2248 { 2249 int printed = 0; 2250 2251 if (trace->print_sample) { 2252 double ts = (double)sample->time / NSEC_PER_MSEC; 2253 2254 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2255 evsel__name(evsel), ts, 2256 thread__comm_str(thread), 2257 sample->pid, sample->tid, sample->cpu); 2258 } 2259 2260 return printed; 2261 } 2262 2263 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2264 { 2265 void *augmented_args = NULL; 2266 /* 2267 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2268 * and there we get all 6 syscall args plus the tracepoint common fields 2269 * that gets calculated at the start and the syscall_nr (another long). 2270 * So we check if that is the case and if so don't look after the 2271 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2272 * which is fixed. 2273 * 2274 * We'll revisit this later to pass s->args_size to the BPF augmenter 2275 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2276 * copies only what we need for each syscall, like what happens when we 2277 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2278 * traffic to just what is needed for each syscall. 2279 */ 2280 int args_size = raw_augmented_args_size ?: sc->args_size; 2281 2282 *augmented_args_size = sample->raw_size - args_size; 2283 if (*augmented_args_size > 0) 2284 augmented_args = sample->raw_data + args_size; 2285 2286 return augmented_args; 2287 } 2288 2289 static void syscall__exit(struct syscall *sc) 2290 { 2291 if (!sc) 2292 return; 2293 2294 free(sc->arg_fmt); 2295 } 2296 2297 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2298 union perf_event *event __maybe_unused, 2299 struct perf_sample *sample) 2300 { 2301 char *msg; 2302 void *args; 2303 int printed = 0; 2304 struct thread *thread; 2305 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2306 int augmented_args_size = 0; 2307 void *augmented_args = NULL; 2308 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2309 struct thread_trace *ttrace; 2310 2311 if (sc == NULL) 2312 return -1; 2313 2314 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2315 ttrace = thread__trace(thread, trace->output); 2316 if (ttrace == NULL) 2317 goto out_put; 2318 2319 trace__fprintf_sample(trace, evsel, sample, thread); 2320 2321 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2322 2323 if (ttrace->entry_str == NULL) { 2324 ttrace->entry_str = malloc(trace__entry_str_size); 2325 if (!ttrace->entry_str) 2326 goto out_put; 2327 } 2328 2329 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2330 trace__printf_interrupted_entry(trace); 2331 /* 2332 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2333 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2334 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2335 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2336 * so when handling, say the openat syscall, we end up getting 6 args for the 2337 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2338 * thinking that the extra 2 u64 args are the augmented filename, so just check 2339 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2340 */ 2341 if (evsel != trace->syscalls.events.sys_enter) 2342 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2343 ttrace->entry_time = sample->time; 2344 msg = ttrace->entry_str; 2345 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2346 2347 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2348 args, augmented_args, augmented_args_size, trace, thread); 2349 2350 if (sc->is_exit) { 2351 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2352 int alignment = 0; 2353 2354 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2355 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2356 if (trace->args_alignment > printed) 2357 alignment = trace->args_alignment - printed; 2358 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2359 } 2360 } else { 2361 ttrace->entry_pending = true; 2362 /* See trace__vfs_getname & trace__sys_exit */ 2363 ttrace->filename.pending_open = false; 2364 } 2365 2366 if (trace->current != thread) { 2367 thread__put(trace->current); 2368 trace->current = thread__get(thread); 2369 } 2370 err = 0; 2371 out_put: 2372 thread__put(thread); 2373 return err; 2374 } 2375 2376 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2377 struct perf_sample *sample) 2378 { 2379 struct thread_trace *ttrace; 2380 struct thread *thread; 2381 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2382 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2383 char msg[1024]; 2384 void *args, *augmented_args = NULL; 2385 int augmented_args_size; 2386 2387 if (sc == NULL) 2388 return -1; 2389 2390 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2391 ttrace = thread__trace(thread, trace->output); 2392 /* 2393 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2394 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2395 */ 2396 if (ttrace == NULL) 2397 goto out_put; 2398 2399 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2400 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2401 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2402 fprintf(trace->output, "%s", msg); 2403 err = 0; 2404 out_put: 2405 thread__put(thread); 2406 return err; 2407 } 2408 2409 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2410 struct perf_sample *sample, 2411 struct callchain_cursor *cursor) 2412 { 2413 struct addr_location al; 2414 int max_stack = evsel->core.attr.sample_max_stack ? 2415 evsel->core.attr.sample_max_stack : 2416 trace->max_stack; 2417 int err; 2418 2419 if (machine__resolve(trace->host, &al, sample) < 0) 2420 return -1; 2421 2422 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2423 addr_location__put(&al); 2424 return err; 2425 } 2426 2427 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2428 { 2429 /* TODO: user-configurable print_opts */ 2430 const unsigned int print_opts = EVSEL__PRINT_SYM | 2431 EVSEL__PRINT_DSO | 2432 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2433 2434 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, symbol_conf.bt_stop_list, trace->output); 2435 } 2436 2437 static const char *errno_to_name(struct evsel *evsel, int err) 2438 { 2439 struct perf_env *env = evsel__env(evsel); 2440 const char *arch_name = perf_env__arch(env); 2441 2442 return arch_syscalls__strerrno(arch_name, err); 2443 } 2444 2445 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2446 union perf_event *event __maybe_unused, 2447 struct perf_sample *sample) 2448 { 2449 long ret; 2450 u64 duration = 0; 2451 bool duration_calculated = false; 2452 struct thread *thread; 2453 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2454 int alignment = trace->args_alignment; 2455 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2456 struct thread_trace *ttrace; 2457 2458 if (sc == NULL) 2459 return -1; 2460 2461 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2462 ttrace = thread__trace(thread, trace->output); 2463 if (ttrace == NULL) 2464 goto out_put; 2465 2466 trace__fprintf_sample(trace, evsel, sample, thread); 2467 2468 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2469 2470 if (trace->summary) 2471 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2472 2473 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2474 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2475 ttrace->filename.pending_open = false; 2476 ++trace->stats.vfs_getname; 2477 } 2478 2479 if (ttrace->entry_time) { 2480 duration = sample->time - ttrace->entry_time; 2481 if (trace__filter_duration(trace, duration)) 2482 goto out; 2483 duration_calculated = true; 2484 } else if (trace->duration_filter) 2485 goto out; 2486 2487 if (sample->callchain) { 2488 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2489 if (callchain_ret == 0) { 2490 if (callchain_cursor.nr < trace->min_stack) 2491 goto out; 2492 callchain_ret = 1; 2493 } 2494 } 2495 2496 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2497 goto out; 2498 2499 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2500 2501 if (ttrace->entry_pending) { 2502 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2503 } else { 2504 printed += fprintf(trace->output, " ... ["); 2505 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2506 printed += 9; 2507 printed += fprintf(trace->output, "]: %s()", sc->name); 2508 } 2509 2510 printed++; /* the closing ')' */ 2511 2512 if (alignment > printed) 2513 alignment -= printed; 2514 else 2515 alignment = 0; 2516 2517 fprintf(trace->output, ")%*s= ", alignment, " "); 2518 2519 if (sc->fmt == NULL) { 2520 if (ret < 0) 2521 goto errno_print; 2522 signed_print: 2523 fprintf(trace->output, "%ld", ret); 2524 } else if (ret < 0) { 2525 errno_print: { 2526 char bf[STRERR_BUFSIZE]; 2527 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2528 *e = errno_to_name(evsel, -ret); 2529 2530 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2531 } 2532 } else if (ret == 0 && sc->fmt->timeout) 2533 fprintf(trace->output, "0 (Timeout)"); 2534 else if (ttrace->ret_scnprintf) { 2535 char bf[1024]; 2536 struct syscall_arg arg = { 2537 .val = ret, 2538 .thread = thread, 2539 .trace = trace, 2540 }; 2541 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2542 ttrace->ret_scnprintf = NULL; 2543 fprintf(trace->output, "%s", bf); 2544 } else if (sc->fmt->hexret) 2545 fprintf(trace->output, "%#lx", ret); 2546 else if (sc->fmt->errpid) { 2547 struct thread *child = machine__find_thread(trace->host, ret, ret); 2548 2549 if (child != NULL) { 2550 fprintf(trace->output, "%ld", ret); 2551 if (child->comm_set) 2552 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2553 thread__put(child); 2554 } 2555 } else 2556 goto signed_print; 2557 2558 fputc('\n', trace->output); 2559 2560 /* 2561 * We only consider an 'event' for the sake of --max-events a non-filtered 2562 * sys_enter + sys_exit and other tracepoint events. 2563 */ 2564 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2565 interrupted = true; 2566 2567 if (callchain_ret > 0) 2568 trace__fprintf_callchain(trace, sample); 2569 else if (callchain_ret < 0) 2570 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2571 out: 2572 ttrace->entry_pending = false; 2573 err = 0; 2574 out_put: 2575 thread__put(thread); 2576 return err; 2577 } 2578 2579 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2580 union perf_event *event __maybe_unused, 2581 struct perf_sample *sample) 2582 { 2583 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2584 struct thread_trace *ttrace; 2585 size_t filename_len, entry_str_len, to_move; 2586 ssize_t remaining_space; 2587 char *pos; 2588 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2589 2590 if (!thread) 2591 goto out; 2592 2593 ttrace = thread__priv(thread); 2594 if (!ttrace) 2595 goto out_put; 2596 2597 filename_len = strlen(filename); 2598 if (filename_len == 0) 2599 goto out_put; 2600 2601 if (ttrace->filename.namelen < filename_len) { 2602 char *f = realloc(ttrace->filename.name, filename_len + 1); 2603 2604 if (f == NULL) 2605 goto out_put; 2606 2607 ttrace->filename.namelen = filename_len; 2608 ttrace->filename.name = f; 2609 } 2610 2611 strcpy(ttrace->filename.name, filename); 2612 ttrace->filename.pending_open = true; 2613 2614 if (!ttrace->filename.ptr) 2615 goto out_put; 2616 2617 entry_str_len = strlen(ttrace->entry_str); 2618 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2619 if (remaining_space <= 0) 2620 goto out_put; 2621 2622 if (filename_len > (size_t)remaining_space) { 2623 filename += filename_len - remaining_space; 2624 filename_len = remaining_space; 2625 } 2626 2627 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2628 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2629 memmove(pos + filename_len, pos, to_move); 2630 memcpy(pos, filename, filename_len); 2631 2632 ttrace->filename.ptr = 0; 2633 ttrace->filename.entry_str_pos = 0; 2634 out_put: 2635 thread__put(thread); 2636 out: 2637 return 0; 2638 } 2639 2640 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2641 union perf_event *event __maybe_unused, 2642 struct perf_sample *sample) 2643 { 2644 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2645 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2646 struct thread *thread = machine__findnew_thread(trace->host, 2647 sample->pid, 2648 sample->tid); 2649 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2650 2651 if (ttrace == NULL) 2652 goto out_dump; 2653 2654 ttrace->runtime_ms += runtime_ms; 2655 trace->runtime_ms += runtime_ms; 2656 out_put: 2657 thread__put(thread); 2658 return 0; 2659 2660 out_dump: 2661 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2662 evsel->name, 2663 evsel__strval(evsel, sample, "comm"), 2664 (pid_t)evsel__intval(evsel, sample, "pid"), 2665 runtime, 2666 evsel__intval(evsel, sample, "vruntime")); 2667 goto out_put; 2668 } 2669 2670 static int bpf_output__printer(enum binary_printer_ops op, 2671 unsigned int val, void *extra __maybe_unused, FILE *fp) 2672 { 2673 unsigned char ch = (unsigned char)val; 2674 2675 switch (op) { 2676 case BINARY_PRINT_CHAR_DATA: 2677 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2678 case BINARY_PRINT_DATA_BEGIN: 2679 case BINARY_PRINT_LINE_BEGIN: 2680 case BINARY_PRINT_ADDR: 2681 case BINARY_PRINT_NUM_DATA: 2682 case BINARY_PRINT_NUM_PAD: 2683 case BINARY_PRINT_SEP: 2684 case BINARY_PRINT_CHAR_PAD: 2685 case BINARY_PRINT_LINE_END: 2686 case BINARY_PRINT_DATA_END: 2687 default: 2688 break; 2689 } 2690 2691 return 0; 2692 } 2693 2694 static void bpf_output__fprintf(struct trace *trace, 2695 struct perf_sample *sample) 2696 { 2697 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2698 bpf_output__printer, NULL, trace->output); 2699 ++trace->nr_events_printed; 2700 } 2701 2702 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2703 struct thread *thread, void *augmented_args, int augmented_args_size) 2704 { 2705 char bf[2048]; 2706 size_t size = sizeof(bf); 2707 struct tep_format_field *field = evsel->tp_format->format.fields; 2708 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2709 size_t printed = 0; 2710 unsigned long val; 2711 u8 bit = 1; 2712 struct syscall_arg syscall_arg = { 2713 .augmented = { 2714 .size = augmented_args_size, 2715 .args = augmented_args, 2716 }, 2717 .idx = 0, 2718 .mask = 0, 2719 .trace = trace, 2720 .thread = thread, 2721 .show_string_prefix = trace->show_string_prefix, 2722 }; 2723 2724 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2725 if (syscall_arg.mask & bit) 2726 continue; 2727 2728 syscall_arg.len = 0; 2729 syscall_arg.fmt = arg; 2730 if (field->flags & TEP_FIELD_IS_ARRAY) { 2731 int offset = field->offset; 2732 2733 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2734 offset = format_field__intval(field, sample, evsel->needs_swap); 2735 syscall_arg.len = offset >> 16; 2736 offset &= 0xffff; 2737 if (field->flags & TEP_FIELD_IS_RELATIVE) 2738 offset += field->offset + field->size; 2739 } 2740 2741 val = (uintptr_t)(sample->raw_data + offset); 2742 } else 2743 val = format_field__intval(field, sample, evsel->needs_swap); 2744 /* 2745 * Some syscall args need some mask, most don't and 2746 * return val untouched. 2747 */ 2748 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2749 2750 /* 2751 * Suppress this argument if its value is zero and 2752 * and we don't have a string associated in an 2753 * strarray for it. 2754 */ 2755 if (val == 0 && 2756 !trace->show_zeros && 2757 !((arg->show_zero || 2758 arg->scnprintf == SCA_STRARRAY || 2759 arg->scnprintf == SCA_STRARRAYS) && 2760 arg->parm)) 2761 continue; 2762 2763 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2764 2765 /* 2766 * XXX Perhaps we should have a show_tp_arg_names, 2767 * leaving show_arg_names just for syscalls? 2768 */ 2769 if (1 || trace->show_arg_names) 2770 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2771 2772 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); 2773 } 2774 2775 return printed + fprintf(trace->output, "%s", bf); 2776 } 2777 2778 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2779 union perf_event *event __maybe_unused, 2780 struct perf_sample *sample) 2781 { 2782 struct thread *thread; 2783 int callchain_ret = 0; 2784 /* 2785 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2786 * this event's max_events having been hit and this is an entry coming 2787 * from the ring buffer that we should discard, since the max events 2788 * have already been considered/printed. 2789 */ 2790 if (evsel->disabled) 2791 return 0; 2792 2793 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2794 2795 if (sample->callchain) { 2796 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2797 if (callchain_ret == 0) { 2798 if (callchain_cursor.nr < trace->min_stack) 2799 goto out; 2800 callchain_ret = 1; 2801 } 2802 } 2803 2804 trace__printf_interrupted_entry(trace); 2805 trace__fprintf_tstamp(trace, sample->time, trace->output); 2806 2807 if (trace->trace_syscalls && trace->show_duration) 2808 fprintf(trace->output, "( ): "); 2809 2810 if (thread) 2811 trace__fprintf_comm_tid(trace, thread, trace->output); 2812 2813 if (evsel == trace->syscalls.events.augmented) { 2814 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2815 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2816 2817 if (sc) { 2818 fprintf(trace->output, "%s(", sc->name); 2819 trace__fprintf_sys_enter(trace, evsel, sample); 2820 fputc(')', trace->output); 2821 goto newline; 2822 } 2823 2824 /* 2825 * XXX: Not having the associated syscall info or not finding/adding 2826 * the thread should never happen, but if it does... 2827 * fall thru and print it as a bpf_output event. 2828 */ 2829 } 2830 2831 fprintf(trace->output, "%s(", evsel->name); 2832 2833 if (evsel__is_bpf_output(evsel)) { 2834 bpf_output__fprintf(trace, sample); 2835 } else if (evsel->tp_format) { 2836 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2837 trace__fprintf_sys_enter(trace, evsel, sample)) { 2838 if (trace->libtraceevent_print) { 2839 event_format__fprintf(evsel->tp_format, sample->cpu, 2840 sample->raw_data, sample->raw_size, 2841 trace->output); 2842 } else { 2843 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); 2844 } 2845 } 2846 } 2847 2848 newline: 2849 fprintf(trace->output, ")\n"); 2850 2851 if (callchain_ret > 0) 2852 trace__fprintf_callchain(trace, sample); 2853 else if (callchain_ret < 0) 2854 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2855 2856 ++trace->nr_events_printed; 2857 2858 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2859 evsel__disable(evsel); 2860 evsel__close(evsel); 2861 } 2862 out: 2863 thread__put(thread); 2864 return 0; 2865 } 2866 2867 static void print_location(FILE *f, struct perf_sample *sample, 2868 struct addr_location *al, 2869 bool print_dso, bool print_sym) 2870 { 2871 2872 if ((verbose > 0 || print_dso) && al->map) 2873 fprintf(f, "%s@", al->map->dso->long_name); 2874 2875 if ((verbose > 0 || print_sym) && al->sym) 2876 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2877 al->addr - al->sym->start); 2878 else if (al->map) 2879 fprintf(f, "0x%" PRIx64, al->addr); 2880 else 2881 fprintf(f, "0x%" PRIx64, sample->addr); 2882 } 2883 2884 static int trace__pgfault(struct trace *trace, 2885 struct evsel *evsel, 2886 union perf_event *event __maybe_unused, 2887 struct perf_sample *sample) 2888 { 2889 struct thread *thread; 2890 struct addr_location al; 2891 char map_type = 'd'; 2892 struct thread_trace *ttrace; 2893 int err = -1; 2894 int callchain_ret = 0; 2895 2896 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2897 2898 if (sample->callchain) { 2899 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2900 if (callchain_ret == 0) { 2901 if (callchain_cursor.nr < trace->min_stack) 2902 goto out_put; 2903 callchain_ret = 1; 2904 } 2905 } 2906 2907 ttrace = thread__trace(thread, trace->output); 2908 if (ttrace == NULL) 2909 goto out_put; 2910 2911 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2912 ttrace->pfmaj++; 2913 else 2914 ttrace->pfmin++; 2915 2916 if (trace->summary_only) 2917 goto out; 2918 2919 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2920 2921 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2922 2923 fprintf(trace->output, "%sfault [", 2924 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2925 "maj" : "min"); 2926 2927 print_location(trace->output, sample, &al, false, true); 2928 2929 fprintf(trace->output, "] => "); 2930 2931 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2932 2933 if (!al.map) { 2934 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2935 2936 if (al.map) 2937 map_type = 'x'; 2938 else 2939 map_type = '?'; 2940 } 2941 2942 print_location(trace->output, sample, &al, true, false); 2943 2944 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2945 2946 if (callchain_ret > 0) 2947 trace__fprintf_callchain(trace, sample); 2948 else if (callchain_ret < 0) 2949 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2950 2951 ++trace->nr_events_printed; 2952 out: 2953 err = 0; 2954 out_put: 2955 thread__put(thread); 2956 return err; 2957 } 2958 2959 static void trace__set_base_time(struct trace *trace, 2960 struct evsel *evsel, 2961 struct perf_sample *sample) 2962 { 2963 /* 2964 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2965 * and don't use sample->time unconditionally, we may end up having 2966 * some other event in the future without PERF_SAMPLE_TIME for good 2967 * reason, i.e. we may not be interested in its timestamps, just in 2968 * it taking place, picking some piece of information when it 2969 * appears in our event stream (vfs_getname comes to mind). 2970 */ 2971 if (trace->base_time == 0 && !trace->full_time && 2972 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 2973 trace->base_time = sample->time; 2974 } 2975 2976 static int trace__process_sample(struct perf_tool *tool, 2977 union perf_event *event, 2978 struct perf_sample *sample, 2979 struct evsel *evsel, 2980 struct machine *machine __maybe_unused) 2981 { 2982 struct trace *trace = container_of(tool, struct trace, tool); 2983 struct thread *thread; 2984 int err = 0; 2985 2986 tracepoint_handler handler = evsel->handler; 2987 2988 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2989 if (thread && thread__is_filtered(thread)) 2990 goto out; 2991 2992 trace__set_base_time(trace, evsel, sample); 2993 2994 if (handler) { 2995 ++trace->nr_events; 2996 handler(trace, evsel, event, sample); 2997 } 2998 out: 2999 thread__put(thread); 3000 return err; 3001 } 3002 3003 static int trace__record(struct trace *trace, int argc, const char **argv) 3004 { 3005 unsigned int rec_argc, i, j; 3006 const char **rec_argv; 3007 const char * const record_args[] = { 3008 "record", 3009 "-R", 3010 "-m", "1024", 3011 "-c", "1", 3012 }; 3013 pid_t pid = getpid(); 3014 char *filter = asprintf__tp_filter_pids(1, &pid); 3015 const char * const sc_args[] = { "-e", }; 3016 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 3017 const char * const majpf_args[] = { "-e", "major-faults" }; 3018 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 3019 const char * const minpf_args[] = { "-e", "minor-faults" }; 3020 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 3021 int err = -1; 3022 3023 /* +3 is for the event string below and the pid filter */ 3024 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + 3025 majpf_args_nr + minpf_args_nr + argc; 3026 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 3027 3028 if (rec_argv == NULL || filter == NULL) 3029 goto out_free; 3030 3031 j = 0; 3032 for (i = 0; i < ARRAY_SIZE(record_args); i++) 3033 rec_argv[j++] = record_args[i]; 3034 3035 if (trace->trace_syscalls) { 3036 for (i = 0; i < sc_args_nr; i++) 3037 rec_argv[j++] = sc_args[i]; 3038 3039 /* event string may be different for older kernels - e.g., RHEL6 */ 3040 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 3041 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 3042 else if (is_valid_tracepoint("syscalls:sys_enter")) 3043 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 3044 else { 3045 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 3046 goto out_free; 3047 } 3048 } 3049 3050 rec_argv[j++] = "--filter"; 3051 rec_argv[j++] = filter; 3052 3053 if (trace->trace_pgfaults & TRACE_PFMAJ) 3054 for (i = 0; i < majpf_args_nr; i++) 3055 rec_argv[j++] = majpf_args[i]; 3056 3057 if (trace->trace_pgfaults & TRACE_PFMIN) 3058 for (i = 0; i < minpf_args_nr; i++) 3059 rec_argv[j++] = minpf_args[i]; 3060 3061 for (i = 0; i < (unsigned int)argc; i++) 3062 rec_argv[j++] = argv[i]; 3063 3064 err = cmd_record(j, rec_argv); 3065 out_free: 3066 free(filter); 3067 free(rec_argv); 3068 return err; 3069 } 3070 3071 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 3072 3073 static bool evlist__add_vfs_getname(struct evlist *evlist) 3074 { 3075 bool found = false; 3076 struct evsel *evsel, *tmp; 3077 struct parse_events_error err; 3078 int ret; 3079 3080 parse_events_error__init(&err); 3081 ret = parse_events(evlist, "probe:vfs_getname*", &err); 3082 parse_events_error__exit(&err); 3083 if (ret) 3084 return false; 3085 3086 evlist__for_each_entry_safe(evlist, evsel, tmp) { 3087 if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) 3088 continue; 3089 3090 if (evsel__field(evsel, "pathname")) { 3091 evsel->handler = trace__vfs_getname; 3092 found = true; 3093 continue; 3094 } 3095 3096 list_del_init(&evsel->core.node); 3097 evsel->evlist = NULL; 3098 evsel__delete(evsel); 3099 } 3100 3101 return found; 3102 } 3103 3104 static struct evsel *evsel__new_pgfault(u64 config) 3105 { 3106 struct evsel *evsel; 3107 struct perf_event_attr attr = { 3108 .type = PERF_TYPE_SOFTWARE, 3109 .mmap_data = 1, 3110 }; 3111 3112 attr.config = config; 3113 attr.sample_period = 1; 3114 3115 event_attr_init(&attr); 3116 3117 evsel = evsel__new(&attr); 3118 if (evsel) 3119 evsel->handler = trace__pgfault; 3120 3121 return evsel; 3122 } 3123 3124 static void evlist__free_syscall_tp_fields(struct evlist *evlist) 3125 { 3126 struct evsel *evsel; 3127 3128 evlist__for_each_entry(evlist, evsel) { 3129 struct evsel_trace *et = evsel->priv; 3130 3131 if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls")) 3132 continue; 3133 3134 free(et->fmt); 3135 free(et); 3136 } 3137 } 3138 3139 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 3140 { 3141 const u32 type = event->header.type; 3142 struct evsel *evsel; 3143 3144 if (type != PERF_RECORD_SAMPLE) { 3145 trace__process_event(trace, trace->host, event, sample); 3146 return; 3147 } 3148 3149 evsel = evlist__id2evsel(trace->evlist, sample->id); 3150 if (evsel == NULL) { 3151 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 3152 return; 3153 } 3154 3155 if (evswitch__discard(&trace->evswitch, evsel)) 3156 return; 3157 3158 trace__set_base_time(trace, evsel, sample); 3159 3160 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 3161 sample->raw_data == NULL) { 3162 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 3163 evsel__name(evsel), sample->tid, 3164 sample->cpu, sample->raw_size); 3165 } else { 3166 tracepoint_handler handler = evsel->handler; 3167 handler(trace, evsel, event, sample); 3168 } 3169 3170 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 3171 interrupted = true; 3172 } 3173 3174 static int trace__add_syscall_newtp(struct trace *trace) 3175 { 3176 int ret = -1; 3177 struct evlist *evlist = trace->evlist; 3178 struct evsel *sys_enter, *sys_exit; 3179 3180 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 3181 if (sys_enter == NULL) 3182 goto out; 3183 3184 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 3185 goto out_delete_sys_enter; 3186 3187 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 3188 if (sys_exit == NULL) 3189 goto out_delete_sys_enter; 3190 3191 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 3192 goto out_delete_sys_exit; 3193 3194 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 3195 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 3196 3197 evlist__add(evlist, sys_enter); 3198 evlist__add(evlist, sys_exit); 3199 3200 if (callchain_param.enabled && !trace->kernel_syscallchains) { 3201 /* 3202 * We're interested only in the user space callchain 3203 * leading to the syscall, allow overriding that for 3204 * debugging reasons using --kernel_syscall_callchains 3205 */ 3206 sys_exit->core.attr.exclude_callchain_kernel = 1; 3207 } 3208 3209 trace->syscalls.events.sys_enter = sys_enter; 3210 trace->syscalls.events.sys_exit = sys_exit; 3211 3212 ret = 0; 3213 out: 3214 return ret; 3215 3216 out_delete_sys_exit: 3217 evsel__delete_priv(sys_exit); 3218 out_delete_sys_enter: 3219 evsel__delete_priv(sys_enter); 3220 goto out; 3221 } 3222 3223 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 3224 { 3225 int err = -1; 3226 struct evsel *sys_exit; 3227 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 3228 trace->ev_qualifier_ids.nr, 3229 trace->ev_qualifier_ids.entries); 3230 3231 if (filter == NULL) 3232 goto out_enomem; 3233 3234 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { 3235 sys_exit = trace->syscalls.events.sys_exit; 3236 err = evsel__append_tp_filter(sys_exit, filter); 3237 } 3238 3239 free(filter); 3240 out: 3241 return err; 3242 out_enomem: 3243 errno = ENOMEM; 3244 goto out; 3245 } 3246 3247 #ifdef HAVE_LIBBPF_SUPPORT 3248 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) 3249 { 3250 if (trace->bpf_obj == NULL) 3251 return NULL; 3252 3253 return bpf_object__find_map_by_name(trace->bpf_obj, name); 3254 } 3255 3256 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3257 { 3258 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); 3259 } 3260 3261 static void trace__set_bpf_map_syscalls(struct trace *trace) 3262 { 3263 trace->syscalls.map = trace__find_bpf_map_by_name(trace, "syscalls"); 3264 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); 3265 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); 3266 } 3267 3268 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 3269 { 3270 struct bpf_program *pos, *prog = NULL; 3271 const char *sec_name; 3272 3273 if (trace->bpf_obj == NULL) 3274 return NULL; 3275 3276 bpf_object__for_each_program(pos, trace->bpf_obj) { 3277 sec_name = bpf_program__section_name(pos); 3278 if (sec_name && !strcmp(sec_name, name)) { 3279 prog = pos; 3280 break; 3281 } 3282 } 3283 3284 return prog; 3285 } 3286 3287 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 3288 const char *prog_name, const char *type) 3289 { 3290 struct bpf_program *prog; 3291 3292 if (prog_name == NULL) { 3293 char default_prog_name[256]; 3294 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); 3295 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3296 if (prog != NULL) 3297 goto out_found; 3298 if (sc->fmt && sc->fmt->alias) { 3299 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); 3300 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3301 if (prog != NULL) 3302 goto out_found; 3303 } 3304 goto out_unaugmented; 3305 } 3306 3307 prog = trace__find_bpf_program_by_title(trace, prog_name); 3308 3309 if (prog != NULL) { 3310 out_found: 3311 return prog; 3312 } 3313 3314 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 3315 prog_name, type, sc->name); 3316 out_unaugmented: 3317 return trace->syscalls.unaugmented_prog; 3318 } 3319 3320 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 3321 { 3322 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3323 3324 if (sc == NULL) 3325 return; 3326 3327 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3328 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 3329 } 3330 3331 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 3332 { 3333 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3334 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3335 } 3336 3337 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 3338 { 3339 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3340 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3341 } 3342 3343 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) 3344 { 3345 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3346 int arg = 0; 3347 3348 if (sc == NULL) 3349 goto out; 3350 3351 for (; arg < sc->nr_args; ++arg) { 3352 entry->string_args_len[arg] = 0; 3353 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { 3354 /* Should be set like strace -s strsize */ 3355 entry->string_args_len[arg] = PATH_MAX; 3356 } 3357 } 3358 out: 3359 for (; arg < 6; ++arg) 3360 entry->string_args_len[arg] = 0; 3361 } 3362 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 3363 { 3364 int fd = bpf_map__fd(trace->syscalls.map); 3365 struct bpf_map_syscall_entry value = { 3366 .enabled = !trace->not_ev_qualifier, 3367 }; 3368 int err = 0; 3369 size_t i; 3370 3371 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 3372 int key = trace->ev_qualifier_ids.entries[i]; 3373 3374 if (value.enabled) { 3375 trace__init_bpf_map_syscall_args(trace, key, &value); 3376 trace__init_syscall_bpf_progs(trace, key); 3377 } 3378 3379 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 3380 if (err) 3381 break; 3382 } 3383 3384 return err; 3385 } 3386 3387 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 3388 { 3389 int fd = bpf_map__fd(trace->syscalls.map); 3390 struct bpf_map_syscall_entry value = { 3391 .enabled = enabled, 3392 }; 3393 int err = 0, key; 3394 3395 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3396 if (enabled) 3397 trace__init_bpf_map_syscall_args(trace, key, &value); 3398 3399 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 3400 if (err) 3401 break; 3402 } 3403 3404 return err; 3405 } 3406 3407 static int trace__init_syscalls_bpf_map(struct trace *trace) 3408 { 3409 bool enabled = true; 3410 3411 if (trace->ev_qualifier_ids.nr) 3412 enabled = trace->not_ev_qualifier; 3413 3414 return __trace__init_syscalls_bpf_map(trace, enabled); 3415 } 3416 3417 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 3418 { 3419 struct tep_format_field *field, *candidate_field; 3420 int id; 3421 3422 /* 3423 * We're only interested in syscalls that have a pointer: 3424 */ 3425 for (field = sc->args; field; field = field->next) { 3426 if (field->flags & TEP_FIELD_IS_POINTER) 3427 goto try_to_find_pair; 3428 } 3429 3430 return NULL; 3431 3432 try_to_find_pair: 3433 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 3434 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3435 struct bpf_program *pair_prog; 3436 bool is_candidate = false; 3437 3438 if (pair == NULL || pair == sc || 3439 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) 3440 continue; 3441 3442 for (field = sc->args, candidate_field = pair->args; 3443 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3444 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3445 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3446 3447 if (is_pointer) { 3448 if (!candidate_is_pointer) { 3449 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3450 continue; 3451 } 3452 } else { 3453 if (candidate_is_pointer) { 3454 // The candidate might copy a pointer we don't have, skip it. 3455 goto next_candidate; 3456 } 3457 continue; 3458 } 3459 3460 if (strcmp(field->type, candidate_field->type)) 3461 goto next_candidate; 3462 3463 is_candidate = true; 3464 } 3465 3466 if (!is_candidate) 3467 goto next_candidate; 3468 3469 /* 3470 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3471 * then it may be collecting that and we then can't use it, as it would collect 3472 * more than what is common to the two syscalls. 3473 */ 3474 if (candidate_field) { 3475 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3476 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3477 goto next_candidate; 3478 } 3479 3480 pair_prog = pair->bpf_prog.sys_enter; 3481 /* 3482 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3483 * have been searched for, so search it here and if it returns the 3484 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3485 * program for a filtered syscall on a non-filtered one. 3486 * 3487 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3488 * useful for "renameat2". 3489 */ 3490 if (pair_prog == NULL) { 3491 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3492 if (pair_prog == trace->syscalls.unaugmented_prog) 3493 goto next_candidate; 3494 } 3495 3496 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3497 return pair_prog; 3498 next_candidate: 3499 continue; 3500 } 3501 3502 return NULL; 3503 } 3504 3505 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3506 { 3507 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), 3508 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); 3509 int err = 0, key; 3510 3511 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3512 int prog_fd; 3513 3514 if (!trace__syscall_enabled(trace, key)) 3515 continue; 3516 3517 trace__init_syscall_bpf_progs(trace, key); 3518 3519 // It'll get at least the "!raw_syscalls:unaugmented" 3520 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3521 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3522 if (err) 3523 break; 3524 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3525 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3526 if (err) 3527 break; 3528 } 3529 3530 /* 3531 * Now lets do a second pass looking for enabled syscalls without 3532 * an augmenter that have a signature that is a superset of another 3533 * syscall with an augmenter so that we can auto-reuse it. 3534 * 3535 * I.e. if we have an augmenter for the "open" syscall that has 3536 * this signature: 3537 * 3538 * int open(const char *pathname, int flags, mode_t mode); 3539 * 3540 * I.e. that will collect just the first string argument, then we 3541 * can reuse it for the 'creat' syscall, that has this signature: 3542 * 3543 * int creat(const char *pathname, mode_t mode); 3544 * 3545 * and for: 3546 * 3547 * int stat(const char *pathname, struct stat *statbuf); 3548 * int lstat(const char *pathname, struct stat *statbuf); 3549 * 3550 * Because the 'open' augmenter will collect the first arg as a string, 3551 * and leave alone all the other args, which already helps with 3552 * beautifying 'stat' and 'lstat''s pathname arg. 3553 * 3554 * Then, in time, when 'stat' gets an augmenter that collects both 3555 * first and second arg (this one on the raw_syscalls:sys_exit prog 3556 * array tail call, then that one will be used. 3557 */ 3558 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3559 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3560 struct bpf_program *pair_prog; 3561 int prog_fd; 3562 3563 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3564 continue; 3565 3566 /* 3567 * For now we're just reusing the sys_enter prog, and if it 3568 * already has an augmenter, we don't need to find one. 3569 */ 3570 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) 3571 continue; 3572 3573 /* 3574 * Look at all the other syscalls for one that has a signature 3575 * that is close enough that we can share: 3576 */ 3577 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3578 if (pair_prog == NULL) 3579 continue; 3580 3581 sc->bpf_prog.sys_enter = pair_prog; 3582 3583 /* 3584 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3585 * with the fd for the program we're reusing: 3586 */ 3587 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3588 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3589 if (err) 3590 break; 3591 } 3592 3593 3594 return err; 3595 } 3596 3597 static void trace__delete_augmented_syscalls(struct trace *trace) 3598 { 3599 struct evsel *evsel, *tmp; 3600 3601 evlist__remove(trace->evlist, trace->syscalls.events.augmented); 3602 evsel__delete(trace->syscalls.events.augmented); 3603 trace->syscalls.events.augmented = NULL; 3604 3605 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) { 3606 if (evsel->bpf_obj == trace->bpf_obj) { 3607 evlist__remove(trace->evlist, evsel); 3608 evsel__delete(evsel); 3609 } 3610 3611 } 3612 3613 bpf_object__close(trace->bpf_obj); 3614 trace->bpf_obj = NULL; 3615 } 3616 #else // HAVE_LIBBPF_SUPPORT 3617 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused, 3618 const char *name __maybe_unused) 3619 { 3620 return NULL; 3621 } 3622 3623 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused) 3624 { 3625 } 3626 3627 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused) 3628 { 3629 } 3630 3631 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 3632 { 3633 return 0; 3634 } 3635 3636 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 3637 { 3638 return 0; 3639 } 3640 3641 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, 3642 const char *name __maybe_unused) 3643 { 3644 return NULL; 3645 } 3646 3647 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) 3648 { 3649 return 0; 3650 } 3651 3652 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused) 3653 { 3654 } 3655 #endif // HAVE_LIBBPF_SUPPORT 3656 3657 static bool trace__only_augmented_syscalls_evsels(struct trace *trace) 3658 { 3659 struct evsel *evsel; 3660 3661 evlist__for_each_entry(trace->evlist, evsel) { 3662 if (evsel == trace->syscalls.events.augmented || 3663 evsel->bpf_obj == trace->bpf_obj) 3664 continue; 3665 3666 return false; 3667 } 3668 3669 return true; 3670 } 3671 3672 static int trace__set_ev_qualifier_filter(struct trace *trace) 3673 { 3674 if (trace->syscalls.map) 3675 return trace__set_ev_qualifier_bpf_filter(trace); 3676 if (trace->syscalls.events.sys_enter) 3677 return trace__set_ev_qualifier_tp_filter(trace); 3678 return 0; 3679 } 3680 3681 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3682 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3683 { 3684 int err = 0; 3685 #ifdef HAVE_LIBBPF_SUPPORT 3686 bool value = true; 3687 int map_fd = bpf_map__fd(map); 3688 size_t i; 3689 3690 for (i = 0; i < npids; ++i) { 3691 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3692 if (err) 3693 break; 3694 } 3695 #endif 3696 return err; 3697 } 3698 3699 static int trace__set_filter_loop_pids(struct trace *trace) 3700 { 3701 unsigned int nr = 1, err; 3702 pid_t pids[32] = { 3703 getpid(), 3704 }; 3705 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3706 3707 while (thread && nr < ARRAY_SIZE(pids)) { 3708 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 3709 3710 if (parent == NULL) 3711 break; 3712 3713 if (!strcmp(thread__comm_str(parent), "sshd") || 3714 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3715 pids[nr++] = parent->tid; 3716 break; 3717 } 3718 thread = parent; 3719 } 3720 3721 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); 3722 if (!err && trace->filter_pids.map) 3723 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3724 3725 return err; 3726 } 3727 3728 static int trace__set_filter_pids(struct trace *trace) 3729 { 3730 int err = 0; 3731 /* 3732 * Better not use !target__has_task() here because we need to cover the 3733 * case where no threads were specified in the command line, but a 3734 * workload was, and in that case we will fill in the thread_map when 3735 * we fork the workload in evlist__prepare_workload. 3736 */ 3737 if (trace->filter_pids.nr > 0) { 3738 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3739 trace->filter_pids.entries); 3740 if (!err && trace->filter_pids.map) { 3741 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3742 trace->filter_pids.entries); 3743 } 3744 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3745 err = trace__set_filter_loop_pids(trace); 3746 } 3747 3748 return err; 3749 } 3750 3751 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3752 { 3753 struct evlist *evlist = trace->evlist; 3754 struct perf_sample sample; 3755 int err = evlist__parse_sample(evlist, event, &sample); 3756 3757 if (err) 3758 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3759 else 3760 trace__handle_event(trace, event, &sample); 3761 3762 return 0; 3763 } 3764 3765 static int __trace__flush_events(struct trace *trace) 3766 { 3767 u64 first = ordered_events__first_time(&trace->oe.data); 3768 u64 flush = trace->oe.last - NSEC_PER_SEC; 3769 3770 /* Is there some thing to flush.. */ 3771 if (first && first < flush) 3772 return ordered_events__flush_time(&trace->oe.data, flush); 3773 3774 return 0; 3775 } 3776 3777 static int trace__flush_events(struct trace *trace) 3778 { 3779 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3780 } 3781 3782 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3783 { 3784 int err; 3785 3786 if (!trace->sort_events) 3787 return __trace__deliver_event(trace, event); 3788 3789 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3790 if (err && err != -1) 3791 return err; 3792 3793 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); 3794 if (err) 3795 return err; 3796 3797 return trace__flush_events(trace); 3798 } 3799 3800 static int ordered_events__deliver_event(struct ordered_events *oe, 3801 struct ordered_event *event) 3802 { 3803 struct trace *trace = container_of(oe, struct trace, oe.data); 3804 3805 return __trace__deliver_event(trace, event->event); 3806 } 3807 3808 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) 3809 { 3810 struct tep_format_field *field; 3811 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); 3812 3813 if (evsel->tp_format == NULL || fmt == NULL) 3814 return NULL; 3815 3816 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) 3817 if (strcmp(field->name, arg) == 0) 3818 return fmt; 3819 3820 return NULL; 3821 } 3822 3823 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) 3824 { 3825 char *tok, *left = evsel->filter, *new_filter = evsel->filter; 3826 3827 while ((tok = strpbrk(left, "=<>!")) != NULL) { 3828 char *right = tok + 1, *right_end; 3829 3830 if (*right == '=') 3831 ++right; 3832 3833 while (isspace(*right)) 3834 ++right; 3835 3836 if (*right == '\0') 3837 break; 3838 3839 while (!isalpha(*left)) 3840 if (++left == tok) { 3841 /* 3842 * Bail out, can't find the name of the argument that is being 3843 * used in the filter, let it try to set this filter, will fail later. 3844 */ 3845 return 0; 3846 } 3847 3848 right_end = right + 1; 3849 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') 3850 ++right_end; 3851 3852 if (isalpha(*right)) { 3853 struct syscall_arg_fmt *fmt; 3854 int left_size = tok - left, 3855 right_size = right_end - right; 3856 char arg[128]; 3857 3858 while (isspace(left[left_size - 1])) 3859 --left_size; 3860 3861 scnprintf(arg, sizeof(arg), "%.*s", left_size, left); 3862 3863 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); 3864 if (fmt == NULL) { 3865 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", 3866 arg, evsel->name, evsel->filter); 3867 return -1; 3868 } 3869 3870 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", 3871 arg, (int)(right - tok), tok, right_size, right); 3872 3873 if (fmt->strtoul) { 3874 u64 val; 3875 struct syscall_arg syscall_arg = { 3876 .parm = fmt->parm, 3877 }; 3878 3879 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { 3880 char *n, expansion[19]; 3881 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); 3882 int expansion_offset = right - new_filter; 3883 3884 pr_debug("%s", expansion); 3885 3886 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { 3887 pr_debug(" out of memory!\n"); 3888 free(new_filter); 3889 return -1; 3890 } 3891 if (new_filter != evsel->filter) 3892 free(new_filter); 3893 left = n + expansion_offset + expansion_lenght; 3894 new_filter = n; 3895 } else { 3896 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3897 right_size, right, arg, evsel->name, evsel->filter); 3898 return -1; 3899 } 3900 } else { 3901 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3902 arg, evsel->name, evsel->filter); 3903 return -1; 3904 } 3905 3906 pr_debug("\n"); 3907 } else { 3908 left = right_end; 3909 } 3910 } 3911 3912 if (new_filter != evsel->filter) { 3913 pr_debug("New filter for %s: %s\n", evsel->name, new_filter); 3914 evsel__set_filter(evsel, new_filter); 3915 free(new_filter); 3916 } 3917 3918 return 0; 3919 } 3920 3921 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) 3922 { 3923 struct evlist *evlist = trace->evlist; 3924 struct evsel *evsel; 3925 3926 evlist__for_each_entry(evlist, evsel) { 3927 if (evsel->filter == NULL) 3928 continue; 3929 3930 if (trace__expand_filter(trace, evsel)) { 3931 *err_evsel = evsel; 3932 return -1; 3933 } 3934 } 3935 3936 return 0; 3937 } 3938 3939 static int trace__run(struct trace *trace, int argc, const char **argv) 3940 { 3941 struct evlist *evlist = trace->evlist; 3942 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3943 int err = -1, i; 3944 unsigned long before; 3945 const bool forks = argc > 0; 3946 bool draining = false; 3947 3948 trace->live = true; 3949 3950 if (!trace->raw_augmented_syscalls) { 3951 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3952 goto out_error_raw_syscalls; 3953 3954 if (trace->trace_syscalls) 3955 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3956 } 3957 3958 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3959 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3960 if (pgfault_maj == NULL) 3961 goto out_error_mem; 3962 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3963 evlist__add(evlist, pgfault_maj); 3964 } 3965 3966 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3967 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3968 if (pgfault_min == NULL) 3969 goto out_error_mem; 3970 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3971 evlist__add(evlist, pgfault_min); 3972 } 3973 3974 /* Enable ignoring missing threads when -u/-p option is defined. */ 3975 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; 3976 3977 if (trace->sched && 3978 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) 3979 goto out_error_sched_stat_runtime; 3980 /* 3981 * If a global cgroup was set, apply it to all the events without an 3982 * explicit cgroup. I.e.: 3983 * 3984 * trace -G A -e sched:*switch 3985 * 3986 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3987 * _and_ sched:sched_switch to the 'A' cgroup, while: 3988 * 3989 * trace -e sched:*switch -G A 3990 * 3991 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3992 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3993 * a cgroup (on the root cgroup, sys wide, etc). 3994 * 3995 * Multiple cgroups: 3996 * 3997 * trace -G A -e sched:*switch -G B 3998 * 3999 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 4000 * to the 'B' cgroup. 4001 * 4002 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 4003 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 4004 */ 4005 if (trace->cgroup) 4006 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 4007 4008 err = evlist__create_maps(evlist, &trace->opts.target); 4009 if (err < 0) { 4010 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 4011 goto out_delete_evlist; 4012 } 4013 4014 err = trace__symbols_init(trace, evlist); 4015 if (err < 0) { 4016 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 4017 goto out_delete_evlist; 4018 } 4019 4020 evlist__config(evlist, &trace->opts, &callchain_param); 4021 4022 if (forks) { 4023 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); 4024 if (err < 0) { 4025 fprintf(trace->output, "Couldn't run the workload!\n"); 4026 goto out_delete_evlist; 4027 } 4028 workload_pid = evlist->workload.pid; 4029 } 4030 4031 err = evlist__open(evlist); 4032 if (err < 0) 4033 goto out_error_open; 4034 4035 err = bpf__apply_obj_config(); 4036 if (err) { 4037 char errbuf[BUFSIZ]; 4038 4039 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 4040 pr_err("ERROR: Apply config to BPF failed: %s\n", 4041 errbuf); 4042 goto out_error_open; 4043 } 4044 4045 err = trace__set_filter_pids(trace); 4046 if (err < 0) 4047 goto out_error_mem; 4048 4049 if (trace->syscalls.map) 4050 trace__init_syscalls_bpf_map(trace); 4051 4052 if (trace->syscalls.prog_array.sys_enter) 4053 trace__init_syscalls_bpf_prog_array_maps(trace); 4054 4055 if (trace->ev_qualifier_ids.nr > 0) { 4056 err = trace__set_ev_qualifier_filter(trace); 4057 if (err < 0) 4058 goto out_errno; 4059 4060 if (trace->syscalls.events.sys_exit) { 4061 pr_debug("event qualifier tracepoint filter: %s\n", 4062 trace->syscalls.events.sys_exit->filter); 4063 } 4064 } 4065 4066 /* 4067 * If the "close" syscall is not traced, then we will not have the 4068 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 4069 * fd->pathname table and were ending up showing the last value set by 4070 * syscalls opening a pathname and associating it with a descriptor or 4071 * reading it from /proc/pid/fd/ in cases where that doesn't make 4072 * sense. 4073 * 4074 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 4075 * not in use. 4076 */ 4077 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 4078 4079 err = trace__expand_filters(trace, &evsel); 4080 if (err) 4081 goto out_delete_evlist; 4082 err = evlist__apply_filters(evlist, &evsel); 4083 if (err < 0) 4084 goto out_error_apply_filters; 4085 4086 if (trace->dump.map) 4087 bpf_map__fprintf(trace->dump.map, trace->output); 4088 4089 err = evlist__mmap(evlist, trace->opts.mmap_pages); 4090 if (err < 0) 4091 goto out_error_mmap; 4092 4093 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 4094 evlist__enable(evlist); 4095 4096 if (forks) 4097 evlist__start_workload(evlist); 4098 4099 if (trace->opts.initial_delay) { 4100 usleep(trace->opts.initial_delay * 1000); 4101 evlist__enable(evlist); 4102 } 4103 4104 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 4105 evlist->core.threads->nr > 1 || 4106 evlist__first(evlist)->core.attr.inherit; 4107 4108 /* 4109 * Now that we already used evsel->core.attr to ask the kernel to setup the 4110 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 4111 * trace__resolve_callchain(), allowing per-event max-stack settings 4112 * to override an explicitly set --max-stack global setting. 4113 */ 4114 evlist__for_each_entry(evlist, evsel) { 4115 if (evsel__has_callchain(evsel) && 4116 evsel->core.attr.sample_max_stack == 0) 4117 evsel->core.attr.sample_max_stack = trace->max_stack; 4118 } 4119 again: 4120 before = trace->nr_events; 4121 4122 for (i = 0; i < evlist->core.nr_mmaps; i++) { 4123 union perf_event *event; 4124 struct mmap *md; 4125 4126 md = &evlist->mmap[i]; 4127 if (perf_mmap__read_init(&md->core) < 0) 4128 continue; 4129 4130 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 4131 ++trace->nr_events; 4132 4133 err = trace__deliver_event(trace, event); 4134 if (err) 4135 goto out_disable; 4136 4137 perf_mmap__consume(&md->core); 4138 4139 if (interrupted) 4140 goto out_disable; 4141 4142 if (done && !draining) { 4143 evlist__disable(evlist); 4144 draining = true; 4145 } 4146 } 4147 perf_mmap__read_done(&md->core); 4148 } 4149 4150 if (trace->nr_events == before) { 4151 int timeout = done ? 100 : -1; 4152 4153 if (!draining && evlist__poll(evlist, timeout) > 0) { 4154 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 4155 draining = true; 4156 4157 goto again; 4158 } else { 4159 if (trace__flush_events(trace)) 4160 goto out_disable; 4161 } 4162 } else { 4163 goto again; 4164 } 4165 4166 out_disable: 4167 thread__zput(trace->current); 4168 4169 evlist__disable(evlist); 4170 4171 if (trace->sort_events) 4172 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 4173 4174 if (!err) { 4175 if (trace->summary) 4176 trace__fprintf_thread_summary(trace, trace->output); 4177 4178 if (trace->show_tool_stats) { 4179 fprintf(trace->output, "Stats:\n " 4180 " vfs_getname : %" PRIu64 "\n" 4181 " proc_getname: %" PRIu64 "\n", 4182 trace->stats.vfs_getname, 4183 trace->stats.proc_getname); 4184 } 4185 } 4186 4187 out_delete_evlist: 4188 trace__symbols__exit(trace); 4189 evlist__free_syscall_tp_fields(evlist); 4190 evlist__delete(evlist); 4191 cgroup__put(trace->cgroup); 4192 trace->evlist = NULL; 4193 trace->live = false; 4194 return err; 4195 { 4196 char errbuf[BUFSIZ]; 4197 4198 out_error_sched_stat_runtime: 4199 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 4200 goto out_error; 4201 4202 out_error_raw_syscalls: 4203 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 4204 goto out_error; 4205 4206 out_error_mmap: 4207 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 4208 goto out_error; 4209 4210 out_error_open: 4211 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 4212 4213 out_error: 4214 fprintf(trace->output, "%s\n", errbuf); 4215 goto out_delete_evlist; 4216 4217 out_error_apply_filters: 4218 fprintf(trace->output, 4219 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 4220 evsel->filter, evsel__name(evsel), errno, 4221 str_error_r(errno, errbuf, sizeof(errbuf))); 4222 goto out_delete_evlist; 4223 } 4224 out_error_mem: 4225 fprintf(trace->output, "Not enough memory to run!\n"); 4226 goto out_delete_evlist; 4227 4228 out_errno: 4229 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 4230 goto out_delete_evlist; 4231 } 4232 4233 static int trace__replay(struct trace *trace) 4234 { 4235 const struct evsel_str_handler handlers[] = { 4236 { "probe:vfs_getname", trace__vfs_getname, }, 4237 }; 4238 struct perf_data data = { 4239 .path = input_name, 4240 .mode = PERF_DATA_MODE_READ, 4241 .force = trace->force, 4242 }; 4243 struct perf_session *session; 4244 struct evsel *evsel; 4245 int err = -1; 4246 4247 trace->tool.sample = trace__process_sample; 4248 trace->tool.mmap = perf_event__process_mmap; 4249 trace->tool.mmap2 = perf_event__process_mmap2; 4250 trace->tool.comm = perf_event__process_comm; 4251 trace->tool.exit = perf_event__process_exit; 4252 trace->tool.fork = perf_event__process_fork; 4253 trace->tool.attr = perf_event__process_attr; 4254 trace->tool.tracing_data = perf_event__process_tracing_data; 4255 trace->tool.build_id = perf_event__process_build_id; 4256 trace->tool.namespaces = perf_event__process_namespaces; 4257 4258 trace->tool.ordered_events = true; 4259 trace->tool.ordering_requires_timestamps = true; 4260 4261 /* add tid to output */ 4262 trace->multiple_threads = true; 4263 4264 session = perf_session__new(&data, &trace->tool); 4265 if (IS_ERR(session)) 4266 return PTR_ERR(session); 4267 4268 if (trace->opts.target.pid) 4269 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 4270 4271 if (trace->opts.target.tid) 4272 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 4273 4274 if (symbol__init(&session->header.env) < 0) 4275 goto out; 4276 4277 trace->host = &session->machines.host; 4278 4279 err = perf_session__set_tracepoints_handlers(session, handlers); 4280 if (err) 4281 goto out; 4282 4283 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); 4284 trace->syscalls.events.sys_enter = evsel; 4285 /* older kernels have syscalls tp versus raw_syscalls */ 4286 if (evsel == NULL) 4287 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); 4288 4289 if (evsel && 4290 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 4291 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 4292 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 4293 goto out; 4294 } 4295 4296 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); 4297 trace->syscalls.events.sys_exit = evsel; 4298 if (evsel == NULL) 4299 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); 4300 if (evsel && 4301 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 4302 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 4303 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 4304 goto out; 4305 } 4306 4307 evlist__for_each_entry(session->evlist, evsel) { 4308 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 4309 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 4310 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 4311 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 4312 evsel->handler = trace__pgfault; 4313 } 4314 4315 setup_pager(); 4316 4317 err = perf_session__process_events(session); 4318 if (err) 4319 pr_err("Failed to process events, error %d", err); 4320 4321 else if (trace->summary) 4322 trace__fprintf_thread_summary(trace, trace->output); 4323 4324 out: 4325 perf_session__delete(session); 4326 4327 return err; 4328 } 4329 4330 static size_t trace__fprintf_threads_header(FILE *fp) 4331 { 4332 size_t printed; 4333 4334 printed = fprintf(fp, "\n Summary of events:\n\n"); 4335 4336 return printed; 4337 } 4338 4339 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 4340 struct syscall_stats *stats; 4341 double msecs; 4342 int syscall; 4343 ) 4344 { 4345 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 4346 struct syscall_stats *stats = source->priv; 4347 4348 entry->syscall = source->i; 4349 entry->stats = stats; 4350 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; 4351 } 4352 4353 static size_t thread__dump_stats(struct thread_trace *ttrace, 4354 struct trace *trace, FILE *fp) 4355 { 4356 size_t printed = 0; 4357 struct syscall *sc; 4358 struct rb_node *nd; 4359 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 4360 4361 if (syscall_stats == NULL) 4362 return 0; 4363 4364 printed += fprintf(fp, "\n"); 4365 4366 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); 4367 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 4368 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); 4369 4370 resort_rb__for_each_entry(nd, syscall_stats) { 4371 struct syscall_stats *stats = syscall_stats_entry->stats; 4372 if (stats) { 4373 double min = (double)(stats->stats.min) / NSEC_PER_MSEC; 4374 double max = (double)(stats->stats.max) / NSEC_PER_MSEC; 4375 double avg = avg_stats(&stats->stats); 4376 double pct; 4377 u64 n = (u64)stats->stats.n; 4378 4379 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; 4380 avg /= NSEC_PER_MSEC; 4381 4382 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 4383 printed += fprintf(fp, " %-15s", sc->name); 4384 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", 4385 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); 4386 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 4387 4388 if (trace->errno_summary && stats->nr_failures) { 4389 const char *arch_name = perf_env__arch(trace->host->env); 4390 int e; 4391 4392 for (e = 0; e < stats->max_errno; ++e) { 4393 if (stats->errnos[e] != 0) 4394 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]); 4395 } 4396 } 4397 } 4398 } 4399 4400 resort_rb__delete(syscall_stats); 4401 printed += fprintf(fp, "\n\n"); 4402 4403 return printed; 4404 } 4405 4406 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 4407 { 4408 size_t printed = 0; 4409 struct thread_trace *ttrace = thread__priv(thread); 4410 double ratio; 4411 4412 if (ttrace == NULL) 4413 return 0; 4414 4415 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 4416 4417 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 4418 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 4419 printed += fprintf(fp, "%.1f%%", ratio); 4420 if (ttrace->pfmaj) 4421 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 4422 if (ttrace->pfmin) 4423 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 4424 if (trace->sched) 4425 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 4426 else if (fputc('\n', fp) != EOF) 4427 ++printed; 4428 4429 printed += thread__dump_stats(ttrace, trace, fp); 4430 4431 return printed; 4432 } 4433 4434 static unsigned long thread__nr_events(struct thread_trace *ttrace) 4435 { 4436 return ttrace ? ttrace->nr_events : 0; 4437 } 4438 4439 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 4440 struct thread *thread; 4441 ) 4442 { 4443 entry->thread = rb_entry(nd, struct thread, rb_node); 4444 } 4445 4446 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4447 { 4448 size_t printed = trace__fprintf_threads_header(fp); 4449 struct rb_node *nd; 4450 int i; 4451 4452 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 4453 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 4454 4455 if (threads == NULL) { 4456 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 4457 return 0; 4458 } 4459 4460 resort_rb__for_each_entry(nd, threads) 4461 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 4462 4463 resort_rb__delete(threads); 4464 } 4465 return printed; 4466 } 4467 4468 static int trace__set_duration(const struct option *opt, const char *str, 4469 int unset __maybe_unused) 4470 { 4471 struct trace *trace = opt->value; 4472 4473 trace->duration_filter = atof(str); 4474 return 0; 4475 } 4476 4477 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4478 int unset __maybe_unused) 4479 { 4480 int ret = -1; 4481 size_t i; 4482 struct trace *trace = opt->value; 4483 /* 4484 * FIXME: introduce a intarray class, plain parse csv and create a 4485 * { int nr, int entries[] } struct... 4486 */ 4487 struct intlist *list = intlist__new(str); 4488 4489 if (list == NULL) 4490 return -1; 4491 4492 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4493 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4494 4495 if (trace->filter_pids.entries == NULL) 4496 goto out; 4497 4498 trace->filter_pids.entries[0] = getpid(); 4499 4500 for (i = 1; i < trace->filter_pids.nr; ++i) 4501 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4502 4503 intlist__delete(list); 4504 ret = 0; 4505 out: 4506 return ret; 4507 } 4508 4509 static int trace__open_output(struct trace *trace, const char *filename) 4510 { 4511 struct stat st; 4512 4513 if (!stat(filename, &st) && st.st_size) { 4514 char oldname[PATH_MAX]; 4515 4516 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4517 unlink(oldname); 4518 rename(filename, oldname); 4519 } 4520 4521 trace->output = fopen(filename, "w"); 4522 4523 return trace->output == NULL ? -errno : 0; 4524 } 4525 4526 static int parse_pagefaults(const struct option *opt, const char *str, 4527 int unset __maybe_unused) 4528 { 4529 int *trace_pgfaults = opt->value; 4530 4531 if (strcmp(str, "all") == 0) 4532 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4533 else if (strcmp(str, "maj") == 0) 4534 *trace_pgfaults |= TRACE_PFMAJ; 4535 else if (strcmp(str, "min") == 0) 4536 *trace_pgfaults |= TRACE_PFMIN; 4537 else 4538 return -1; 4539 4540 return 0; 4541 } 4542 4543 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4544 { 4545 struct evsel *evsel; 4546 4547 evlist__for_each_entry(evlist, evsel) { 4548 if (evsel->handler == NULL) 4549 evsel->handler = handler; 4550 } 4551 } 4552 4553 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4554 { 4555 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4556 4557 if (fmt) { 4558 struct syscall_fmt *scfmt = syscall_fmt__find(name); 4559 4560 if (scfmt) { 4561 int skip = 0; 4562 4563 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4564 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4565 ++skip; 4566 4567 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4568 } 4569 } 4570 } 4571 4572 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4573 { 4574 struct evsel *evsel; 4575 4576 evlist__for_each_entry(evlist, evsel) { 4577 if (evsel->priv || !evsel->tp_format) 4578 continue; 4579 4580 if (strcmp(evsel->tp_format->system, "syscalls")) { 4581 evsel__init_tp_arg_scnprintf(evsel); 4582 continue; 4583 } 4584 4585 if (evsel__init_syscall_tp(evsel)) 4586 return -1; 4587 4588 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4589 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4590 4591 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4592 return -1; 4593 4594 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4595 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4596 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4597 4598 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4599 return -1; 4600 4601 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4602 } 4603 } 4604 4605 return 0; 4606 } 4607 4608 /* 4609 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4610 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4611 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4612 * 4613 * It'd be better to introduce a parse_options() variant that would return a 4614 * list with the terms it didn't match to an event... 4615 */ 4616 static int trace__parse_events_option(const struct option *opt, const char *str, 4617 int unset __maybe_unused) 4618 { 4619 struct trace *trace = (struct trace *)opt->value; 4620 const char *s = str; 4621 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4622 int len = strlen(str) + 1, err = -1, list, idx; 4623 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4624 char group_name[PATH_MAX]; 4625 struct syscall_fmt *fmt; 4626 4627 if (strace_groups_dir == NULL) 4628 return -1; 4629 4630 if (*s == '!') { 4631 ++s; 4632 trace->not_ev_qualifier = true; 4633 } 4634 4635 while (1) { 4636 if ((sep = strchr(s, ',')) != NULL) 4637 *sep = '\0'; 4638 4639 list = 0; 4640 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4641 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4642 list = 1; 4643 goto do_concat; 4644 } 4645 4646 fmt = syscall_fmt__find_by_alias(s); 4647 if (fmt != NULL) { 4648 list = 1; 4649 s = fmt->name; 4650 } else { 4651 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4652 if (access(group_name, R_OK) == 0) 4653 list = 1; 4654 } 4655 do_concat: 4656 if (lists[list]) { 4657 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4658 } else { 4659 lists[list] = malloc(len); 4660 if (lists[list] == NULL) 4661 goto out; 4662 strcpy(lists[list], s); 4663 } 4664 4665 if (!sep) 4666 break; 4667 4668 *sep = ','; 4669 s = sep + 1; 4670 } 4671 4672 if (lists[1] != NULL) { 4673 struct strlist_config slist_config = { 4674 .dirname = strace_groups_dir, 4675 }; 4676 4677 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4678 if (trace->ev_qualifier == NULL) { 4679 fputs("Not enough memory to parse event qualifier", trace->output); 4680 goto out; 4681 } 4682 4683 if (trace__validate_ev_qualifier(trace)) 4684 goto out; 4685 trace->trace_syscalls = true; 4686 } 4687 4688 err = 0; 4689 4690 if (lists[0]) { 4691 struct option o = { 4692 .value = &trace->evlist, 4693 }; 4694 err = parse_events_option(&o, lists[0], 0); 4695 } 4696 out: 4697 free(strace_groups_dir); 4698 free(lists[0]); 4699 free(lists[1]); 4700 if (sep) 4701 *sep = ','; 4702 4703 return err; 4704 } 4705 4706 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 4707 { 4708 struct trace *trace = opt->value; 4709 4710 if (!list_empty(&trace->evlist->core.entries)) { 4711 struct option o = { 4712 .value = &trace->evlist, 4713 }; 4714 return parse_cgroups(&o, str, unset); 4715 } 4716 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4717 4718 return 0; 4719 } 4720 4721 static int trace__config(const char *var, const char *value, void *arg) 4722 { 4723 struct trace *trace = arg; 4724 int err = 0; 4725 4726 if (!strcmp(var, "trace.add_events")) { 4727 trace->perfconfig_events = strdup(value); 4728 if (trace->perfconfig_events == NULL) { 4729 pr_err("Not enough memory for %s\n", "trace.add_events"); 4730 return -1; 4731 } 4732 } else if (!strcmp(var, "trace.show_timestamp")) { 4733 trace->show_tstamp = perf_config_bool(var, value); 4734 } else if (!strcmp(var, "trace.show_duration")) { 4735 trace->show_duration = perf_config_bool(var, value); 4736 } else if (!strcmp(var, "trace.show_arg_names")) { 4737 trace->show_arg_names = perf_config_bool(var, value); 4738 if (!trace->show_arg_names) 4739 trace->show_zeros = true; 4740 } else if (!strcmp(var, "trace.show_zeros")) { 4741 bool new_show_zeros = perf_config_bool(var, value); 4742 if (!trace->show_arg_names && !new_show_zeros) { 4743 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4744 goto out; 4745 } 4746 trace->show_zeros = new_show_zeros; 4747 } else if (!strcmp(var, "trace.show_prefix")) { 4748 trace->show_string_prefix = perf_config_bool(var, value); 4749 } else if (!strcmp(var, "trace.no_inherit")) { 4750 trace->opts.no_inherit = perf_config_bool(var, value); 4751 } else if (!strcmp(var, "trace.args_alignment")) { 4752 int args_alignment = 0; 4753 if (perf_config_int(&args_alignment, var, value) == 0) 4754 trace->args_alignment = args_alignment; 4755 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4756 if (strcasecmp(value, "libtraceevent") == 0) 4757 trace->libtraceevent_print = true; 4758 else if (strcasecmp(value, "libbeauty") == 0) 4759 trace->libtraceevent_print = false; 4760 } 4761 out: 4762 return err; 4763 } 4764 4765 static void trace__exit(struct trace *trace) 4766 { 4767 int i; 4768 4769 strlist__delete(trace->ev_qualifier); 4770 free(trace->ev_qualifier_ids.entries); 4771 if (trace->syscalls.table) { 4772 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4773 syscall__exit(&trace->syscalls.table[i]); 4774 free(trace->syscalls.table); 4775 } 4776 syscalltbl__delete(trace->sctbl); 4777 zfree(&trace->perfconfig_events); 4778 } 4779 4780 int cmd_trace(int argc, const char **argv) 4781 { 4782 const char *trace_usage[] = { 4783 "perf trace [<options>] [<command>]", 4784 "perf trace [<options>] -- <command> [<options>]", 4785 "perf trace record [<options>] [<command>]", 4786 "perf trace record [<options>] -- <command> [<options>]", 4787 NULL 4788 }; 4789 struct trace trace = { 4790 .opts = { 4791 .target = { 4792 .uid = UINT_MAX, 4793 .uses_mmap = true, 4794 }, 4795 .user_freq = UINT_MAX, 4796 .user_interval = ULLONG_MAX, 4797 .no_buffering = true, 4798 .mmap_pages = UINT_MAX, 4799 }, 4800 .output = stderr, 4801 .show_comm = true, 4802 .show_tstamp = true, 4803 .show_duration = true, 4804 .show_arg_names = true, 4805 .args_alignment = 70, 4806 .trace_syscalls = false, 4807 .kernel_syscallchains = false, 4808 .max_stack = UINT_MAX, 4809 .max_events = ULONG_MAX, 4810 }; 4811 const char *map_dump_str = NULL; 4812 const char *output_name = NULL; 4813 const struct option trace_options[] = { 4814 OPT_CALLBACK('e', "event", &trace, "event", 4815 "event/syscall selector. use 'perf list' to list available events", 4816 trace__parse_events_option), 4817 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4818 "event filter", parse_filter), 4819 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4820 "show the thread COMM next to its id"), 4821 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4822 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4823 trace__parse_events_option), 4824 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4825 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4826 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4827 "trace events on existing process id"), 4828 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4829 "trace events on existing thread id"), 4830 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4831 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4832 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4833 "system-wide collection from all CPUs"), 4834 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4835 "list of cpus to monitor"), 4836 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4837 "child tasks do not inherit counters"), 4838 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4839 "number of mmap data pages", evlist__parse_mmap_pages), 4840 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4841 "user to profile"), 4842 OPT_CALLBACK(0, "duration", &trace, "float", 4843 "show only events with duration > N.M ms", 4844 trace__set_duration), 4845 #ifdef HAVE_LIBBPF_SUPPORT 4846 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 4847 #endif 4848 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4849 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4850 OPT_BOOLEAN('T', "time", &trace.full_time, 4851 "Show full timestamp, not time relative to first start"), 4852 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4853 "Show only syscalls that failed"), 4854 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4855 "Show only syscall summary with statistics"), 4856 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4857 "Show all syscalls and summary with statistics"), 4858 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4859 "Show errno stats per syscall, use with -s or -S"), 4860 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4861 "Trace pagefaults", parse_pagefaults, "maj"), 4862 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4863 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4864 OPT_CALLBACK(0, "call-graph", &trace.opts, 4865 "record_mode[,record_size]", record_callchain_help, 4866 &record_parse_callchain_opt), 4867 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4868 "Use libtraceevent to print the tracepoint arguments."), 4869 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4870 "Show the kernel callchains on the syscall exit path"), 4871 OPT_ULONG(0, "max-events", &trace.max_events, 4872 "Set the maximum number of events to print, exit after that is reached. "), 4873 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4874 "Set the minimum stack depth when parsing the callchain, " 4875 "anything below the specified depth will be ignored."), 4876 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4877 "Set the maximum stack depth when parsing the callchain, " 4878 "anything beyond the specified depth will be ignored. " 4879 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4880 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4881 "Sort batch of events before processing, use if getting out of order events"), 4882 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4883 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4884 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4885 "per thread proc mmap processing timeout in ms"), 4886 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4887 trace__parse_cgroups), 4888 OPT_INTEGER('D', "delay", &trace.opts.initial_delay, 4889 "ms to wait before starting measurement after program " 4890 "start"), 4891 OPTS_EVSWITCH(&trace.evswitch), 4892 OPT_END() 4893 }; 4894 bool __maybe_unused max_stack_user_set = true; 4895 bool mmap_pages_user_set = true; 4896 struct evsel *evsel; 4897 const char * const trace_subcommands[] = { "record", NULL }; 4898 int err = -1; 4899 char bf[BUFSIZ]; 4900 struct sigaction sigchld_act; 4901 4902 signal(SIGSEGV, sighandler_dump_stack); 4903 signal(SIGFPE, sighandler_dump_stack); 4904 signal(SIGINT, sighandler_interrupt); 4905 4906 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4907 sigchld_act.sa_flags = SA_SIGINFO; 4908 sigchld_act.sa_sigaction = sighandler_chld; 4909 sigaction(SIGCHLD, &sigchld_act, NULL); 4910 4911 trace.evlist = evlist__new(); 4912 trace.sctbl = syscalltbl__new(); 4913 4914 if (trace.evlist == NULL || trace.sctbl == NULL) { 4915 pr_err("Not enough memory to run!\n"); 4916 err = -ENOMEM; 4917 goto out; 4918 } 4919 4920 /* 4921 * Parsing .perfconfig may entail creating a BPF event, that may need 4922 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4923 * is too small. This affects just this process, not touching the 4924 * global setting. If it fails we'll get something in 'perf trace -v' 4925 * to help diagnose the problem. 4926 */ 4927 rlimit__bump_memlock(); 4928 4929 err = perf_config(trace__config, &trace); 4930 if (err) 4931 goto out; 4932 4933 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4934 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4935 4936 /* 4937 * Here we already passed thru trace__parse_events_option() and it has 4938 * already figured out if -e syscall_name, if not but if --event 4939 * foo:bar was used, the user is interested _just_ in those, say, 4940 * tracepoint events, not in the strace-like syscall-name-based mode. 4941 * 4942 * This is important because we need to check if strace-like mode is 4943 * needed to decided if we should filter out the eBPF 4944 * __augmented_syscalls__ code, if it is in the mix, say, via 4945 * .perfconfig trace.add_events, and filter those out. 4946 */ 4947 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4948 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4949 trace.trace_syscalls = true; 4950 } 4951 /* 4952 * Now that we have --verbose figured out, lets see if we need to parse 4953 * events from .perfconfig, so that if those events fail parsing, say some 4954 * BPF program fails, then we'll be able to use --verbose to see what went 4955 * wrong in more detail. 4956 */ 4957 if (trace.perfconfig_events != NULL) { 4958 struct parse_events_error parse_err; 4959 4960 parse_events_error__init(&parse_err); 4961 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4962 if (err) 4963 parse_events_error__print(&parse_err, trace.perfconfig_events); 4964 parse_events_error__exit(&parse_err); 4965 if (err) 4966 goto out; 4967 } 4968 4969 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4970 usage_with_options_msg(trace_usage, trace_options, 4971 "cgroup monitoring only available in system-wide mode"); 4972 } 4973 4974 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 4975 if (IS_ERR(evsel)) { 4976 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 4977 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 4978 goto out; 4979 } 4980 4981 if (evsel) { 4982 trace.syscalls.events.augmented = evsel; 4983 4984 evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); 4985 if (evsel == NULL) { 4986 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); 4987 goto out; 4988 } 4989 4990 if (evsel->bpf_obj == NULL) { 4991 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); 4992 goto out; 4993 } 4994 4995 trace.bpf_obj = evsel->bpf_obj; 4996 4997 /* 4998 * If we have _just_ the augmenter event but don't have a 4999 * explicit --syscalls, then assume we want all strace-like 5000 * syscalls: 5001 */ 5002 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace)) 5003 trace.trace_syscalls = true; 5004 /* 5005 * So, if we have a syscall augmenter, but trace_syscalls, aka 5006 * strace-like syscall tracing is not set, then we need to trow 5007 * away the augmenter, i.e. all the events that were created 5008 * from that BPF object file. 5009 * 5010 * This is more to fix the current .perfconfig trace.add_events 5011 * style of setting up the strace-like eBPF based syscall point 5012 * payload augmenter. 5013 * 5014 * All this complexity will be avoided by adding an alternative 5015 * to trace.add_events in the form of 5016 * trace.bpf_augmented_syscalls, that will be only parsed if we 5017 * need it. 5018 * 5019 * .perfconfig trace.add_events is still useful if we want, for 5020 * instance, have msr_write.msr in some .perfconfig profile based 5021 * 'perf trace --config determinism.profile' mode, where for some 5022 * particular goal/workload type we want a set of events and 5023 * output mode (with timings, etc) instead of having to add 5024 * all via the command line. 5025 * 5026 * Also --config to specify an alternate .perfconfig file needs 5027 * to be implemented. 5028 */ 5029 if (!trace.trace_syscalls) { 5030 trace__delete_augmented_syscalls(&trace); 5031 } else { 5032 trace__set_bpf_map_filtered_pids(&trace); 5033 trace__set_bpf_map_syscalls(&trace); 5034 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); 5035 } 5036 } 5037 5038 err = bpf__setup_stdout(trace.evlist); 5039 if (err) { 5040 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 5041 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 5042 goto out; 5043 } 5044 5045 err = -1; 5046 5047 if (map_dump_str) { 5048 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); 5049 if (trace.dump.map == NULL) { 5050 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 5051 goto out; 5052 } 5053 } 5054 5055 if (trace.trace_pgfaults) { 5056 trace.opts.sample_address = true; 5057 trace.opts.sample_time = true; 5058 } 5059 5060 if (trace.opts.mmap_pages == UINT_MAX) 5061 mmap_pages_user_set = false; 5062 5063 if (trace.max_stack == UINT_MAX) { 5064 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 5065 max_stack_user_set = false; 5066 } 5067 5068 #ifdef HAVE_DWARF_UNWIND_SUPPORT 5069 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 5070 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 5071 } 5072 #endif 5073 5074 if (callchain_param.enabled) { 5075 if (!mmap_pages_user_set && geteuid() == 0) 5076 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 5077 5078 symbol_conf.use_callchain = true; 5079 } 5080 5081 if (trace.evlist->core.nr_entries > 0) { 5082 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 5083 if (evlist__set_syscall_tp_fields(trace.evlist)) { 5084 perror("failed to set syscalls:* tracepoint fields"); 5085 goto out; 5086 } 5087 } 5088 5089 if (trace.sort_events) { 5090 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 5091 ordered_events__set_copy_on_queue(&trace.oe.data, true); 5092 } 5093 5094 /* 5095 * If we are augmenting syscalls, then combine what we put in the 5096 * __augmented_syscalls__ BPF map with what is in the 5097 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 5098 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 5099 * 5100 * We'll switch to look at two BPF maps, one for sys_enter and the 5101 * other for sys_exit when we start augmenting the sys_exit paths with 5102 * buffers that are being copied from kernel to userspace, think 'read' 5103 * syscall. 5104 */ 5105 if (trace.syscalls.events.augmented) { 5106 evlist__for_each_entry(trace.evlist, evsel) { 5107 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 5108 5109 if (raw_syscalls_sys_exit) { 5110 trace.raw_augmented_syscalls = true; 5111 goto init_augmented_syscall_tp; 5112 } 5113 5114 if (trace.syscalls.events.augmented->priv == NULL && 5115 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 5116 struct evsel *augmented = trace.syscalls.events.augmented; 5117 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 5118 evsel__init_augmented_syscall_tp_args(augmented)) 5119 goto out; 5120 /* 5121 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 5122 * Above we made sure we can get from the payload the tp fields 5123 * that we get from syscalls:sys_enter tracefs format file. 5124 */ 5125 augmented->handler = trace__sys_enter; 5126 /* 5127 * Now we do the same for the *syscalls:sys_enter event so that 5128 * if we handle it directly, i.e. if the BPF prog returns 0 so 5129 * as not to filter it, then we'll handle it just like we would 5130 * for the BPF_OUTPUT one: 5131 */ 5132 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 5133 evsel__init_augmented_syscall_tp_args(evsel)) 5134 goto out; 5135 evsel->handler = trace__sys_enter; 5136 } 5137 5138 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 5139 struct syscall_tp *sc; 5140 init_augmented_syscall_tp: 5141 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 5142 goto out; 5143 sc = __evsel__syscall_tp(evsel); 5144 /* 5145 * For now with BPF raw_augmented we hook into 5146 * raw_syscalls:sys_enter and there we get all 5147 * 6 syscall args plus the tracepoint common 5148 * fields and the syscall_nr (another long). 5149 * So we check if that is the case and if so 5150 * don't look after the sc->args_size but 5151 * always after the full raw_syscalls:sys_enter 5152 * payload, which is fixed. 5153 * 5154 * We'll revisit this later to pass 5155 * s->args_size to the BPF augmenter (now 5156 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5157 * so that it copies only what we need for each 5158 * syscall, like what happens when we use 5159 * syscalls:sys_enter_NAME, so that we reduce 5160 * the kernel/userspace traffic to just what is 5161 * needed for each syscall. 5162 */ 5163 if (trace.raw_augmented_syscalls) 5164 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5165 evsel__init_augmented_syscall_tp_ret(evsel); 5166 evsel->handler = trace__sys_exit; 5167 } 5168 } 5169 } 5170 5171 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5172 return trace__record(&trace, argc-1, &argv[1]); 5173 5174 /* Using just --errno-summary will trigger --summary */ 5175 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5176 trace.summary_only = true; 5177 5178 /* summary_only implies summary option, but don't overwrite summary if set */ 5179 if (trace.summary_only) 5180 trace.summary = trace.summary_only; 5181 5182 if (output_name != NULL) { 5183 err = trace__open_output(&trace, output_name); 5184 if (err < 0) { 5185 perror("failed to create output file"); 5186 goto out; 5187 } 5188 } 5189 5190 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5191 if (err) 5192 goto out_close; 5193 5194 err = target__validate(&trace.opts.target); 5195 if (err) { 5196 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5197 fprintf(trace.output, "%s", bf); 5198 goto out_close; 5199 } 5200 5201 err = target__parse_uid(&trace.opts.target); 5202 if (err) { 5203 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5204 fprintf(trace.output, "%s", bf); 5205 goto out_close; 5206 } 5207 5208 if (!argc && target__none(&trace.opts.target)) 5209 trace.opts.target.system_wide = true; 5210 5211 if (input_name) 5212 err = trace__replay(&trace); 5213 else 5214 err = trace__run(&trace, argc, argv); 5215 5216 out_close: 5217 if (output_name != NULL) 5218 fclose(trace.output); 5219 out: 5220 trace__exit(&trace); 5221 return err; 5222 } 5223