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