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