1 /* 2 * builtin-trace.c 3 * 4 * Builtin 'trace' command: 5 * 6 * Display a continuously updated trace of any workload, CPU, specific PID, 7 * system wide, etc. Default format is loosely strace like, but any other 8 * event may be specified using --event. 9 * 10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 11 * 12 * Initially based on the 'trace' prototype by Thomas Gleixner: 13 * 14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 15 */ 16 17 #include "util/record.h" 18 #include <api/fs/tracing_path.h> 19 #ifdef HAVE_LIBBPF_SUPPORT 20 #include <bpf/bpf.h> 21 #endif 22 #include "util/bpf_map.h" 23 #include "util/rlimit.h" 24 #include "builtin.h" 25 #include "util/cgroup.h" 26 #include "util/color.h" 27 #include "util/config.h" 28 #include "util/debug.h" 29 #include "util/dso.h" 30 #include "util/env.h" 31 #include "util/event.h" 32 #include "util/evsel.h" 33 #include "util/evsel_fprintf.h" 34 #include "util/synthetic-events.h" 35 #include "util/evlist.h" 36 #include "util/evswitch.h" 37 #include "util/mmap.h" 38 #include <subcmd/pager.h> 39 #include <subcmd/exec-cmd.h> 40 #include "util/machine.h" 41 #include "util/map.h" 42 #include "util/symbol.h" 43 #include "util/path.h" 44 #include "util/session.h" 45 #include "util/thread.h" 46 #include <subcmd/parse-options.h> 47 #include "util/strlist.h" 48 #include "util/intlist.h" 49 #include "util/thread_map.h" 50 #include "util/stat.h" 51 #include "util/tool.h" 52 #include "util/util.h" 53 #include "trace/beauty/beauty.h" 54 #include "trace-event.h" 55 #include "util/parse-events.h" 56 #include "util/bpf-loader.h" 57 #include "util/tracepoint.h" 58 #include "callchain.h" 59 #include "print_binary.h" 60 #include "string2.h" 61 #include "syscalltbl.h" 62 #include "rb_resort.h" 63 #include "../perf.h" 64 65 #include <errno.h> 66 #include <inttypes.h> 67 #include <poll.h> 68 #include <signal.h> 69 #include <stdlib.h> 70 #include <string.h> 71 #include <linux/err.h> 72 #include <linux/filter.h> 73 #include <linux/kernel.h> 74 #include <linux/random.h> 75 #include <linux/stringify.h> 76 #include <linux/time64.h> 77 #include <linux/zalloc.h> 78 #include <fcntl.h> 79 #include <sys/sysmacros.h> 80 81 #include <linux/ctype.h> 82 #include <perf/mmap.h> 83 84 #ifdef HAVE_LIBTRACEEVENT 85 #include <traceevent/event-parse.h> 86 #endif 87 88 #ifndef O_CLOEXEC 89 # define O_CLOEXEC 02000000 90 #endif 91 92 #ifndef F_LINUX_SPECIFIC_BASE 93 # define F_LINUX_SPECIFIC_BASE 1024 94 #endif 95 96 #define RAW_SYSCALL_ARGS_NUM 6 97 98 /* 99 * strtoul: Go from a string to a value, i.e. for msr: MSR_FS_BASE to 0xc0000100 100 */ 101 struct syscall_arg_fmt { 102 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 103 bool (*strtoul)(char *bf, size_t size, struct syscall_arg *arg, u64 *val); 104 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 105 void *parm; 106 const char *name; 107 u16 nr_entries; // for arrays 108 bool show_zero; 109 }; 110 111 struct syscall_fmt { 112 const char *name; 113 const char *alias; 114 struct { 115 const char *sys_enter, 116 *sys_exit; 117 } bpf_prog_name; 118 struct syscall_arg_fmt arg[RAW_SYSCALL_ARGS_NUM]; 119 u8 nr_args; 120 bool errpid; 121 bool timeout; 122 bool hexret; 123 }; 124 125 struct trace { 126 struct perf_tool tool; 127 struct syscalltbl *sctbl; 128 struct { 129 struct syscall *table; 130 struct { // per syscall BPF_MAP_TYPE_PROG_ARRAY 131 struct bpf_map *sys_enter, 132 *sys_exit; 133 } prog_array; 134 struct { 135 struct evsel *sys_enter, 136 *sys_exit, 137 *augmented; 138 } events; 139 struct bpf_program *unaugmented_prog; 140 } syscalls; 141 struct { 142 struct bpf_map *map; 143 } dump; 144 struct record_opts opts; 145 struct evlist *evlist; 146 struct machine *host; 147 struct thread *current; 148 struct bpf_object *bpf_obj; 149 struct cgroup *cgroup; 150 u64 base_time; 151 FILE *output; 152 unsigned long nr_events; 153 unsigned long nr_events_printed; 154 unsigned long max_events; 155 struct evswitch evswitch; 156 struct strlist *ev_qualifier; 157 struct { 158 size_t nr; 159 int *entries; 160 } ev_qualifier_ids; 161 struct { 162 size_t nr; 163 pid_t *entries; 164 struct bpf_map *map; 165 } filter_pids; 166 double duration_filter; 167 double runtime_ms; 168 struct { 169 u64 vfs_getname, 170 proc_getname; 171 } stats; 172 unsigned int max_stack; 173 unsigned int min_stack; 174 int raw_augmented_syscalls_args_size; 175 bool raw_augmented_syscalls; 176 bool fd_path_disabled; 177 bool sort_events; 178 bool not_ev_qualifier; 179 bool live; 180 bool full_time; 181 bool sched; 182 bool multiple_threads; 183 bool summary; 184 bool summary_only; 185 bool errno_summary; 186 bool failure_only; 187 bool show_comm; 188 bool print_sample; 189 bool show_tool_stats; 190 bool trace_syscalls; 191 bool libtraceevent_print; 192 bool kernel_syscallchains; 193 s16 args_alignment; 194 bool show_tstamp; 195 bool show_duration; 196 bool show_zeros; 197 bool show_arg_names; 198 bool show_string_prefix; 199 bool force; 200 bool vfs_getname; 201 int trace_pgfaults; 202 char *perfconfig_events; 203 struct { 204 struct ordered_events data; 205 u64 last; 206 } oe; 207 }; 208 209 struct tp_field { 210 int offset; 211 union { 212 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 213 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 214 }; 215 }; 216 217 #define TP_UINT_FIELD(bits) \ 218 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 219 { \ 220 u##bits value; \ 221 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 222 return value; \ 223 } 224 225 TP_UINT_FIELD(8); 226 TP_UINT_FIELD(16); 227 TP_UINT_FIELD(32); 228 TP_UINT_FIELD(64); 229 230 #define TP_UINT_FIELD__SWAPPED(bits) \ 231 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 232 { \ 233 u##bits value; \ 234 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 235 return bswap_##bits(value);\ 236 } 237 238 TP_UINT_FIELD__SWAPPED(16); 239 TP_UINT_FIELD__SWAPPED(32); 240 TP_UINT_FIELD__SWAPPED(64); 241 242 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 243 { 244 field->offset = offset; 245 246 switch (size) { 247 case 1: 248 field->integer = tp_field__u8; 249 break; 250 case 2: 251 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 252 break; 253 case 4: 254 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 255 break; 256 case 8: 257 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 258 break; 259 default: 260 return -1; 261 } 262 263 return 0; 264 } 265 266 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 267 { 268 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 269 } 270 271 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 272 { 273 return sample->raw_data + field->offset; 274 } 275 276 static int __tp_field__init_ptr(struct tp_field *field, int offset) 277 { 278 field->offset = offset; 279 field->pointer = tp_field__ptr; 280 return 0; 281 } 282 283 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 284 { 285 return __tp_field__init_ptr(field, format_field->offset); 286 } 287 288 struct syscall_tp { 289 struct tp_field id; 290 union { 291 struct tp_field args, ret; 292 }; 293 }; 294 295 /* 296 * The evsel->priv as used by 'perf trace' 297 * sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME 298 * fmt: for all the other tracepoints 299 */ 300 struct evsel_trace { 301 struct syscall_tp sc; 302 struct syscall_arg_fmt *fmt; 303 }; 304 305 static struct evsel_trace *evsel_trace__new(void) 306 { 307 return zalloc(sizeof(struct evsel_trace)); 308 } 309 310 static void evsel_trace__delete(struct evsel_trace *et) 311 { 312 if (et == NULL) 313 return; 314 315 zfree(&et->fmt); 316 free(et); 317 } 318 319 /* 320 * Used with raw_syscalls:sys_{enter,exit} and with the 321 * syscalls:sys_{enter,exit}_SYSCALL tracepoints 322 */ 323 static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel) 324 { 325 struct evsel_trace *et = evsel->priv; 326 327 return &et->sc; 328 } 329 330 static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel) 331 { 332 if (evsel->priv == NULL) { 333 evsel->priv = evsel_trace__new(); 334 if (evsel->priv == NULL) 335 return NULL; 336 } 337 338 return __evsel__syscall_tp(evsel); 339 } 340 341 /* 342 * Used with all the other tracepoints. 343 */ 344 static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel) 345 { 346 struct evsel_trace *et = evsel->priv; 347 348 return et->fmt; 349 } 350 351 static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel) 352 { 353 struct evsel_trace *et = evsel->priv; 354 355 if (evsel->priv == NULL) { 356 et = evsel->priv = evsel_trace__new(); 357 358 if (et == NULL) 359 return NULL; 360 } 361 362 if (et->fmt == NULL) { 363 et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt)); 364 if (et->fmt == NULL) 365 goto out_delete; 366 } 367 368 return __evsel__syscall_arg_fmt(evsel); 369 370 out_delete: 371 evsel_trace__delete(evsel->priv); 372 evsel->priv = NULL; 373 return NULL; 374 } 375 376 static int evsel__init_tp_uint_field(struct evsel *evsel, struct tp_field *field, const char *name) 377 { 378 struct tep_format_field *format_field = evsel__field(evsel, name); 379 380 if (format_field == NULL) 381 return -1; 382 383 return tp_field__init_uint(field, format_field, evsel->needs_swap); 384 } 385 386 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 387 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 388 evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 389 390 static int evsel__init_tp_ptr_field(struct evsel *evsel, struct tp_field *field, const char *name) 391 { 392 struct tep_format_field *format_field = evsel__field(evsel, name); 393 394 if (format_field == NULL) 395 return -1; 396 397 return tp_field__init_ptr(field, format_field); 398 } 399 400 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 401 ({ struct syscall_tp *sc = __evsel__syscall_tp(evsel);\ 402 evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 403 404 static void evsel__delete_priv(struct evsel *evsel) 405 { 406 zfree(&evsel->priv); 407 evsel__delete(evsel); 408 } 409 410 static int evsel__init_syscall_tp(struct evsel *evsel) 411 { 412 struct syscall_tp *sc = evsel__syscall_tp(evsel); 413 414 if (sc != NULL) { 415 if (evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 416 evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 417 return -ENOENT; 418 return 0; 419 } 420 421 return -ENOMEM; 422 } 423 424 static int evsel__init_augmented_syscall_tp(struct evsel *evsel, struct evsel *tp) 425 { 426 struct syscall_tp *sc = evsel__syscall_tp(evsel); 427 428 if (sc != NULL) { 429 struct tep_format_field *syscall_id = evsel__field(tp, "id"); 430 if (syscall_id == NULL) 431 syscall_id = evsel__field(tp, "__syscall_nr"); 432 if (syscall_id == NULL || 433 __tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 434 return -EINVAL; 435 436 return 0; 437 } 438 439 return -ENOMEM; 440 } 441 442 static int evsel__init_augmented_syscall_tp_args(struct evsel *evsel) 443 { 444 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 445 446 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 447 } 448 449 static int evsel__init_augmented_syscall_tp_ret(struct evsel *evsel) 450 { 451 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 452 453 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 454 } 455 456 static int evsel__init_raw_syscall_tp(struct evsel *evsel, void *handler) 457 { 458 if (evsel__syscall_tp(evsel) != NULL) { 459 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 460 return -ENOENT; 461 462 evsel->handler = handler; 463 return 0; 464 } 465 466 return -ENOMEM; 467 } 468 469 static struct evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 470 { 471 struct evsel *evsel = evsel__newtp("raw_syscalls", direction); 472 473 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 474 if (IS_ERR(evsel)) 475 evsel = evsel__newtp("syscalls", direction); 476 477 if (IS_ERR(evsel)) 478 return NULL; 479 480 if (evsel__init_raw_syscall_tp(evsel, handler)) 481 goto out_delete; 482 483 return evsel; 484 485 out_delete: 486 evsel__delete_priv(evsel); 487 return NULL; 488 } 489 490 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 491 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 492 fields->name.integer(&fields->name, sample); }) 493 494 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 495 ({ struct syscall_tp *fields = __evsel__syscall_tp(evsel); \ 496 fields->name.pointer(&fields->name, sample); }) 497 498 size_t strarray__scnprintf_suffix(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_suffix, int val) 499 { 500 int idx = val - sa->offset; 501 502 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 503 size_t printed = scnprintf(bf, size, intfmt, val); 504 if (show_suffix) 505 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 506 return printed; 507 } 508 509 return scnprintf(bf, size, "%s%s", sa->entries[idx], show_suffix ? sa->prefix : ""); 510 } 511 512 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 513 { 514 int idx = val - sa->offset; 515 516 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 517 size_t printed = scnprintf(bf, size, intfmt, val); 518 if (show_prefix) 519 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 520 return printed; 521 } 522 523 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 524 } 525 526 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 527 const char *intfmt, 528 struct syscall_arg *arg) 529 { 530 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 531 } 532 533 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 534 struct syscall_arg *arg) 535 { 536 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 537 } 538 539 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 540 541 bool syscall_arg__strtoul_strarray(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 542 { 543 return strarray__strtoul(arg->parm, bf, size, ret); 544 } 545 546 bool syscall_arg__strtoul_strarray_flags(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 547 { 548 return strarray__strtoul_flags(arg->parm, bf, size, ret); 549 } 550 551 bool syscall_arg__strtoul_strarrays(char *bf, size_t size, struct syscall_arg *arg, u64 *ret) 552 { 553 return strarrays__strtoul(arg->parm, bf, size, ret); 554 } 555 556 size_t syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 557 { 558 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 559 } 560 561 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 562 { 563 size_t printed; 564 int i; 565 566 for (i = 0; i < sas->nr_entries; ++i) { 567 struct strarray *sa = sas->entries[i]; 568 int idx = val - sa->offset; 569 570 if (idx >= 0 && idx < sa->nr_entries) { 571 if (sa->entries[idx] == NULL) 572 break; 573 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 574 } 575 } 576 577 printed = scnprintf(bf, size, intfmt, val); 578 if (show_prefix) 579 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 580 return printed; 581 } 582 583 bool strarray__strtoul(struct strarray *sa, char *bf, size_t size, u64 *ret) 584 { 585 int i; 586 587 for (i = 0; i < sa->nr_entries; ++i) { 588 if (sa->entries[i] && strncmp(sa->entries[i], bf, size) == 0 && sa->entries[i][size] == '\0') { 589 *ret = sa->offset + i; 590 return true; 591 } 592 } 593 594 return false; 595 } 596 597 bool strarray__strtoul_flags(struct strarray *sa, char *bf, size_t size, u64 *ret) 598 { 599 u64 val = 0; 600 char *tok = bf, *sep, *end; 601 602 *ret = 0; 603 604 while (size != 0) { 605 int toklen = size; 606 607 sep = memchr(tok, '|', size); 608 if (sep != NULL) { 609 size -= sep - tok + 1; 610 611 end = sep - 1; 612 while (end > tok && isspace(*end)) 613 --end; 614 615 toklen = end - tok + 1; 616 } 617 618 while (isspace(*tok)) 619 ++tok; 620 621 if (isalpha(*tok) || *tok == '_') { 622 if (!strarray__strtoul(sa, tok, toklen, &val)) 623 return false; 624 } else 625 val = strtoul(tok, NULL, 0); 626 627 *ret |= (1 << (val - 1)); 628 629 if (sep == NULL) 630 break; 631 tok = sep + 1; 632 } 633 634 return true; 635 } 636 637 bool strarrays__strtoul(struct strarrays *sas, char *bf, size_t size, u64 *ret) 638 { 639 int i; 640 641 for (i = 0; i < sas->nr_entries; ++i) { 642 struct strarray *sa = sas->entries[i]; 643 644 if (strarray__strtoul(sa, bf, size, ret)) 645 return true; 646 } 647 648 return false; 649 } 650 651 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 652 struct syscall_arg *arg) 653 { 654 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 655 } 656 657 #ifndef AT_FDCWD 658 #define AT_FDCWD -100 659 #endif 660 661 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 662 struct syscall_arg *arg) 663 { 664 int fd = arg->val; 665 const char *prefix = "AT_FD"; 666 667 if (fd == AT_FDCWD) 668 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 669 670 return syscall_arg__scnprintf_fd(bf, size, arg); 671 } 672 673 #define SCA_FDAT syscall_arg__scnprintf_fd_at 674 675 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 676 struct syscall_arg *arg); 677 678 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 679 680 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 681 { 682 return scnprintf(bf, size, "%#lx", arg->val); 683 } 684 685 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 686 { 687 if (arg->val == 0) 688 return scnprintf(bf, size, "NULL"); 689 return syscall_arg__scnprintf_hex(bf, size, arg); 690 } 691 692 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 693 { 694 return scnprintf(bf, size, "%d", arg->val); 695 } 696 697 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 698 { 699 return scnprintf(bf, size, "%ld", arg->val); 700 } 701 702 static size_t syscall_arg__scnprintf_char_array(char *bf, size_t size, struct syscall_arg *arg) 703 { 704 // XXX Hey, maybe for sched:sched_switch prev/next comm fields we can 705 // fill missing comms using thread__set_comm()... 706 // here or in a special syscall_arg__scnprintf_pid_sched_tp... 707 return scnprintf(bf, size, "\"%-.*s\"", arg->fmt->nr_entries ?: arg->len, arg->val); 708 } 709 710 #define SCA_CHAR_ARRAY syscall_arg__scnprintf_char_array 711 712 static const char *bpf_cmd[] = { 713 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 714 "MAP_GET_NEXT_KEY", "PROG_LOAD", "OBJ_PIN", "OBJ_GET", "PROG_ATTACH", 715 "PROG_DETACH", "PROG_TEST_RUN", "PROG_GET_NEXT_ID", "MAP_GET_NEXT_ID", 716 "PROG_GET_FD_BY_ID", "MAP_GET_FD_BY_ID", "OBJ_GET_INFO_BY_FD", 717 "PROG_QUERY", "RAW_TRACEPOINT_OPEN", "BTF_LOAD", "BTF_GET_FD_BY_ID", 718 "TASK_FD_QUERY", "MAP_LOOKUP_AND_DELETE_ELEM", "MAP_FREEZE", 719 "BTF_GET_NEXT_ID", "MAP_LOOKUP_BATCH", "MAP_LOOKUP_AND_DELETE_BATCH", 720 "MAP_UPDATE_BATCH", "MAP_DELETE_BATCH", "LINK_CREATE", "LINK_UPDATE", 721 "LINK_GET_FD_BY_ID", "LINK_GET_NEXT_ID", "ENABLE_STATS", "ITER_CREATE", 722 "LINK_DETACH", "PROG_BIND_MAP", 723 }; 724 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 725 726 static const char *fsmount_flags[] = { 727 [1] = "CLOEXEC", 728 }; 729 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 730 731 #include "trace/beauty/generated/fsconfig_arrays.c" 732 733 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 734 735 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 736 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 737 738 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 739 static DEFINE_STRARRAY(itimers, "ITIMER_"); 740 741 static const char *keyctl_options[] = { 742 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 743 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 744 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 745 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 746 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 747 }; 748 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 749 750 static const char *whences[] = { "SET", "CUR", "END", 751 #ifdef SEEK_DATA 752 "DATA", 753 #endif 754 #ifdef SEEK_HOLE 755 "HOLE", 756 #endif 757 }; 758 static DEFINE_STRARRAY(whences, "SEEK_"); 759 760 static const char *fcntl_cmds[] = { 761 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 762 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 763 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 764 "GETOWNER_UIDS", 765 }; 766 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 767 768 static const char *fcntl_linux_specific_cmds[] = { 769 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 770 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 771 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 772 }; 773 774 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 775 776 static struct strarray *fcntl_cmds_arrays[] = { 777 &strarray__fcntl_cmds, 778 &strarray__fcntl_linux_specific_cmds, 779 }; 780 781 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 782 783 static const char *rlimit_resources[] = { 784 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 785 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 786 "RTTIME", 787 }; 788 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 789 790 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 791 static DEFINE_STRARRAY(sighow, "SIG_"); 792 793 static const char *clockid[] = { 794 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 795 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 796 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 797 }; 798 static DEFINE_STRARRAY(clockid, "CLOCK_"); 799 800 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 801 struct syscall_arg *arg) 802 { 803 bool show_prefix = arg->show_string_prefix; 804 const char *suffix = "_OK"; 805 size_t printed = 0; 806 int mode = arg->val; 807 808 if (mode == F_OK) /* 0 */ 809 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 810 #define P_MODE(n) \ 811 if (mode & n##_OK) { \ 812 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 813 mode &= ~n##_OK; \ 814 } 815 816 P_MODE(R); 817 P_MODE(W); 818 P_MODE(X); 819 #undef P_MODE 820 821 if (mode) 822 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 823 824 return printed; 825 } 826 827 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 828 829 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 830 struct syscall_arg *arg); 831 832 #define SCA_FILENAME syscall_arg__scnprintf_filename 833 834 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 835 struct syscall_arg *arg) 836 { 837 bool show_prefix = arg->show_string_prefix; 838 const char *prefix = "O_"; 839 int printed = 0, flags = arg->val; 840 841 #define P_FLAG(n) \ 842 if (flags & O_##n) { \ 843 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 844 flags &= ~O_##n; \ 845 } 846 847 P_FLAG(CLOEXEC); 848 P_FLAG(NONBLOCK); 849 #undef P_FLAG 850 851 if (flags) 852 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 853 854 return printed; 855 } 856 857 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 858 859 #ifndef GRND_NONBLOCK 860 #define GRND_NONBLOCK 0x0001 861 #endif 862 #ifndef GRND_RANDOM 863 #define GRND_RANDOM 0x0002 864 #endif 865 866 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 867 struct syscall_arg *arg) 868 { 869 bool show_prefix = arg->show_string_prefix; 870 const char *prefix = "GRND_"; 871 int printed = 0, flags = arg->val; 872 873 #define P_FLAG(n) \ 874 if (flags & GRND_##n) { \ 875 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 876 flags &= ~GRND_##n; \ 877 } 878 879 P_FLAG(RANDOM); 880 P_FLAG(NONBLOCK); 881 #undef P_FLAG 882 883 if (flags) 884 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 885 886 return printed; 887 } 888 889 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 890 891 #define STRARRAY(name, array) \ 892 { .scnprintf = SCA_STRARRAY, \ 893 .strtoul = STUL_STRARRAY, \ 894 .parm = &strarray__##array, } 895 896 #define STRARRAY_FLAGS(name, array) \ 897 { .scnprintf = SCA_STRARRAY_FLAGS, \ 898 .strtoul = STUL_STRARRAY_FLAGS, \ 899 .parm = &strarray__##array, } 900 901 #include "trace/beauty/arch_errno_names.c" 902 #include "trace/beauty/eventfd.c" 903 #include "trace/beauty/futex_op.c" 904 #include "trace/beauty/futex_val3.c" 905 #include "trace/beauty/mmap.c" 906 #include "trace/beauty/mode_t.c" 907 #include "trace/beauty/msg_flags.c" 908 #include "trace/beauty/open_flags.c" 909 #include "trace/beauty/perf_event_open.c" 910 #include "trace/beauty/pid.c" 911 #include "trace/beauty/sched_policy.c" 912 #include "trace/beauty/seccomp.c" 913 #include "trace/beauty/signum.c" 914 #include "trace/beauty/socket_type.c" 915 #include "trace/beauty/waitid_options.c" 916 917 static const struct syscall_fmt syscall_fmts[] = { 918 { .name = "access", 919 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 920 { .name = "arch_prctl", 921 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 922 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 923 { .name = "bind", 924 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 925 [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, 926 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 927 { .name = "bpf", 928 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 929 { .name = "brk", .hexret = true, 930 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 931 { .name = "clock_gettime", 932 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 933 { .name = "clock_nanosleep", 934 .arg = { [2] = { .scnprintf = SCA_TIMESPEC, /* rqtp */ }, }, }, 935 { .name = "clone", .errpid = true, .nr_args = 5, 936 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 937 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 938 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 939 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 940 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 941 { .name = "close", 942 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 943 { .name = "connect", 944 .arg = { [0] = { .scnprintf = SCA_INT, /* fd */ }, 945 [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, 946 [2] = { .scnprintf = SCA_INT, /* addrlen */ }, }, }, 947 { .name = "epoll_ctl", 948 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 949 { .name = "eventfd2", 950 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 951 { .name = "fchmodat", 952 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 953 { .name = "fchownat", 954 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 955 { .name = "fcntl", 956 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 957 .strtoul = STUL_STRARRAYS, 958 .parm = &strarrays__fcntl_cmds_arrays, 959 .show_zero = true, }, 960 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 961 { .name = "flock", 962 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 963 { .name = "fsconfig", 964 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 965 { .name = "fsmount", 966 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 967 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 968 { .name = "fspick", 969 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 970 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 971 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 972 { .name = "fstat", .alias = "newfstat", }, 973 { .name = "fstatat", .alias = "newfstatat", }, 974 { .name = "futex", 975 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 976 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 977 { .name = "futimesat", 978 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 979 { .name = "getitimer", 980 .arg = { [0] = STRARRAY(which, itimers), }, }, 981 { .name = "getpid", .errpid = true, }, 982 { .name = "getpgid", .errpid = true, }, 983 { .name = "getppid", .errpid = true, }, 984 { .name = "getrandom", 985 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 986 { .name = "getrlimit", 987 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 988 { .name = "getsockopt", 989 .arg = { [1] = STRARRAY(level, socket_level), }, }, 990 { .name = "gettid", .errpid = true, }, 991 { .name = "ioctl", 992 .arg = { 993 #if defined(__i386__) || defined(__x86_64__) 994 /* 995 * FIXME: Make this available to all arches. 996 */ 997 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 998 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 999 #else 1000 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 1001 #endif 1002 { .name = "kcmp", .nr_args = 5, 1003 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 1004 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 1005 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 1006 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 1007 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 1008 { .name = "keyctl", 1009 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 1010 { .name = "kill", 1011 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1012 { .name = "linkat", 1013 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1014 { .name = "lseek", 1015 .arg = { [2] = STRARRAY(whence, whences), }, }, 1016 { .name = "lstat", .alias = "newlstat", }, 1017 { .name = "madvise", 1018 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1019 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 1020 { .name = "mkdirat", 1021 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1022 { .name = "mknodat", 1023 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 1024 { .name = "mmap", .hexret = true, 1025 /* The standard mmap maps to old_mmap on s390x */ 1026 #if defined(__s390x__) 1027 .alias = "old_mmap", 1028 #endif 1029 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1030 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ 1031 .strtoul = STUL_STRARRAY_FLAGS, 1032 .parm = &strarray__mmap_flags, }, 1033 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 1034 { .name = "mount", 1035 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 1036 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 1037 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 1038 { .name = "move_mount", 1039 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 1040 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 1041 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 1042 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 1043 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 1044 { .name = "mprotect", 1045 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1046 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 1047 { .name = "mq_unlink", 1048 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 1049 { .name = "mremap", .hexret = true, 1050 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 1051 { .name = "name_to_handle_at", 1052 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1053 { .name = "newfstatat", 1054 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1055 { .name = "open", 1056 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1057 { .name = "open_by_handle_at", 1058 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1059 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1060 { .name = "openat", 1061 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 1062 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 1063 { .name = "perf_event_open", 1064 .arg = { [0] = { .scnprintf = SCA_PERF_ATTR, /* attr */ }, 1065 [2] = { .scnprintf = SCA_INT, /* cpu */ }, 1066 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 1067 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 1068 { .name = "pipe2", 1069 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 1070 { .name = "pkey_alloc", 1071 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 1072 { .name = "pkey_free", 1073 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 1074 { .name = "pkey_mprotect", 1075 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 1076 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 1077 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 1078 { .name = "poll", .timeout = true, }, 1079 { .name = "ppoll", .timeout = true, }, 1080 { .name = "prctl", 1081 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ 1082 .strtoul = STUL_STRARRAY, 1083 .parm = &strarray__prctl_options, }, 1084 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 1085 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 1086 { .name = "pread", .alias = "pread64", }, 1087 { .name = "preadv", .alias = "pread", }, 1088 { .name = "prlimit64", 1089 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 1090 { .name = "pwrite", .alias = "pwrite64", }, 1091 { .name = "readlinkat", 1092 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1093 { .name = "recvfrom", 1094 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1095 { .name = "recvmmsg", 1096 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1097 { .name = "recvmsg", 1098 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1099 { .name = "renameat", 1100 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1101 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 1102 { .name = "renameat2", 1103 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 1104 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 1105 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 1106 { .name = "rt_sigaction", 1107 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1108 { .name = "rt_sigprocmask", 1109 .arg = { [0] = STRARRAY(how, sighow), }, }, 1110 { .name = "rt_sigqueueinfo", 1111 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1112 { .name = "rt_tgsigqueueinfo", 1113 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1114 { .name = "sched_setscheduler", 1115 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 1116 { .name = "seccomp", 1117 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 1118 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 1119 { .name = "select", .timeout = true, }, 1120 { .name = "sendfile", .alias = "sendfile64", }, 1121 { .name = "sendmmsg", 1122 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1123 { .name = "sendmsg", 1124 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 1125 { .name = "sendto", 1126 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 1127 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 1128 { .name = "set_tid_address", .errpid = true, }, 1129 { .name = "setitimer", 1130 .arg = { [0] = STRARRAY(which, itimers), }, }, 1131 { .name = "setrlimit", 1132 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 1133 { .name = "setsockopt", 1134 .arg = { [1] = STRARRAY(level, socket_level), }, }, 1135 { .name = "socket", 1136 .arg = { [0] = STRARRAY(family, socket_families), 1137 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1138 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1139 { .name = "socketpair", 1140 .arg = { [0] = STRARRAY(family, socket_families), 1141 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 1142 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 1143 { .name = "stat", .alias = "newstat", }, 1144 { .name = "statx", 1145 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 1146 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 1147 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 1148 { .name = "swapoff", 1149 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1150 { .name = "swapon", 1151 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 1152 { .name = "symlinkat", 1153 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1154 { .name = "sync_file_range", 1155 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 1156 { .name = "tgkill", 1157 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1158 { .name = "tkill", 1159 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 1160 { .name = "umount2", .alias = "umount", 1161 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 1162 { .name = "uname", .alias = "newuname", }, 1163 { .name = "unlinkat", 1164 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 1165 { .name = "utimensat", 1166 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 1167 { .name = "wait4", .errpid = true, 1168 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1169 { .name = "waitid", .errpid = true, 1170 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 1171 }; 1172 1173 static int syscall_fmt__cmp(const void *name, const void *fmtp) 1174 { 1175 const struct syscall_fmt *fmt = fmtp; 1176 return strcmp(name, fmt->name); 1177 } 1178 1179 static const struct syscall_fmt *__syscall_fmt__find(const struct syscall_fmt *fmts, 1180 const int nmemb, 1181 const char *name) 1182 { 1183 return bsearch(name, fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 1184 } 1185 1186 static const struct syscall_fmt *syscall_fmt__find(const char *name) 1187 { 1188 const int nmemb = ARRAY_SIZE(syscall_fmts); 1189 return __syscall_fmt__find(syscall_fmts, nmemb, name); 1190 } 1191 1192 static const struct syscall_fmt *__syscall_fmt__find_by_alias(const struct syscall_fmt *fmts, 1193 const int nmemb, const char *alias) 1194 { 1195 int i; 1196 1197 for (i = 0; i < nmemb; ++i) { 1198 if (fmts[i].alias && strcmp(fmts[i].alias, alias) == 0) 1199 return &fmts[i]; 1200 } 1201 1202 return NULL; 1203 } 1204 1205 static const struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 1206 { 1207 const int nmemb = ARRAY_SIZE(syscall_fmts); 1208 return __syscall_fmt__find_by_alias(syscall_fmts, nmemb, alias); 1209 } 1210 1211 /* 1212 * is_exit: is this "exit" or "exit_group"? 1213 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 1214 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 1215 * nonexistent: Just a hole in the syscall table, syscall id not allocated 1216 */ 1217 struct syscall { 1218 struct tep_event *tp_format; 1219 int nr_args; 1220 int args_size; 1221 struct { 1222 struct bpf_program *sys_enter, 1223 *sys_exit; 1224 } bpf_prog; 1225 bool is_exit; 1226 bool is_open; 1227 bool nonexistent; 1228 struct tep_format_field *args; 1229 const char *name; 1230 const struct syscall_fmt *fmt; 1231 struct syscall_arg_fmt *arg_fmt; 1232 }; 1233 1234 /* 1235 * We need to have this 'calculated' boolean because in some cases we really 1236 * don't know what is the duration of a syscall, for instance, when we start 1237 * a session and some threads are waiting for a syscall to finish, say 'poll', 1238 * in which case all we can do is to print "( ? ) for duration and for the 1239 * start timestamp. 1240 */ 1241 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 1242 { 1243 double duration = (double)t / NSEC_PER_MSEC; 1244 size_t printed = fprintf(fp, "("); 1245 1246 if (!calculated) 1247 printed += fprintf(fp, " "); 1248 else if (duration >= 1.0) 1249 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1250 else if (duration >= 0.01) 1251 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1252 else 1253 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1254 return printed + fprintf(fp, "): "); 1255 } 1256 1257 /** 1258 * filename.ptr: The filename char pointer that will be vfs_getname'd 1259 * filename.entry_str_pos: Where to insert the string translated from 1260 * filename.ptr by the vfs_getname tracepoint/kprobe. 1261 * ret_scnprintf: syscall args may set this to a different syscall return 1262 * formatter, for instance, fcntl may return fds, file flags, etc. 1263 */ 1264 struct thread_trace { 1265 u64 entry_time; 1266 bool entry_pending; 1267 unsigned long nr_events; 1268 unsigned long pfmaj, pfmin; 1269 char *entry_str; 1270 double runtime_ms; 1271 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1272 struct { 1273 unsigned long ptr; 1274 short int entry_str_pos; 1275 bool pending_open; 1276 unsigned int namelen; 1277 char *name; 1278 } filename; 1279 struct { 1280 int max; 1281 struct file *table; 1282 } files; 1283 1284 struct intlist *syscall_stats; 1285 }; 1286 1287 static struct thread_trace *thread_trace__new(void) 1288 { 1289 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1290 1291 if (ttrace) { 1292 ttrace->files.max = -1; 1293 ttrace->syscall_stats = intlist__new(NULL); 1294 } 1295 1296 return ttrace; 1297 } 1298 1299 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1300 { 1301 struct thread_trace *ttrace; 1302 1303 if (thread == NULL) 1304 goto fail; 1305 1306 if (thread__priv(thread) == NULL) 1307 thread__set_priv(thread, thread_trace__new()); 1308 1309 if (thread__priv(thread) == NULL) 1310 goto fail; 1311 1312 ttrace = thread__priv(thread); 1313 ++ttrace->nr_events; 1314 1315 return ttrace; 1316 fail: 1317 color_fprintf(fp, PERF_COLOR_RED, 1318 "WARNING: not enough memory, dropping samples!\n"); 1319 return NULL; 1320 } 1321 1322 1323 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1324 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1325 { 1326 struct thread_trace *ttrace = thread__priv(arg->thread); 1327 1328 ttrace->ret_scnprintf = ret_scnprintf; 1329 } 1330 1331 #define TRACE_PFMAJ (1 << 0) 1332 #define TRACE_PFMIN (1 << 1) 1333 1334 static const size_t trace__entry_str_size = 2048; 1335 1336 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1337 { 1338 if (fd < 0) 1339 return NULL; 1340 1341 if (fd > ttrace->files.max) { 1342 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1343 1344 if (nfiles == NULL) 1345 return NULL; 1346 1347 if (ttrace->files.max != -1) { 1348 memset(nfiles + ttrace->files.max + 1, 0, 1349 (fd - ttrace->files.max) * sizeof(struct file)); 1350 } else { 1351 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1352 } 1353 1354 ttrace->files.table = nfiles; 1355 ttrace->files.max = fd; 1356 } 1357 1358 return ttrace->files.table + fd; 1359 } 1360 1361 struct file *thread__files_entry(struct thread *thread, int fd) 1362 { 1363 return thread_trace__files_entry(thread__priv(thread), fd); 1364 } 1365 1366 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1367 { 1368 struct thread_trace *ttrace = thread__priv(thread); 1369 struct file *file = thread_trace__files_entry(ttrace, fd); 1370 1371 if (file != NULL) { 1372 struct stat st; 1373 if (stat(pathname, &st) == 0) 1374 file->dev_maj = major(st.st_rdev); 1375 file->pathname = strdup(pathname); 1376 if (file->pathname) 1377 return 0; 1378 } 1379 1380 return -1; 1381 } 1382 1383 static int thread__read_fd_path(struct thread *thread, int fd) 1384 { 1385 char linkname[PATH_MAX], pathname[PATH_MAX]; 1386 struct stat st; 1387 int ret; 1388 1389 if (thread__pid(thread) == thread__tid(thread)) { 1390 scnprintf(linkname, sizeof(linkname), 1391 "/proc/%d/fd/%d", thread__pid(thread), fd); 1392 } else { 1393 scnprintf(linkname, sizeof(linkname), 1394 "/proc/%d/task/%d/fd/%d", 1395 thread__pid(thread), thread__tid(thread), fd); 1396 } 1397 1398 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1399 return -1; 1400 1401 ret = readlink(linkname, pathname, sizeof(pathname)); 1402 1403 if (ret < 0 || ret > st.st_size) 1404 return -1; 1405 1406 pathname[ret] = '\0'; 1407 return trace__set_fd_pathname(thread, fd, pathname); 1408 } 1409 1410 static const char *thread__fd_path(struct thread *thread, int fd, 1411 struct trace *trace) 1412 { 1413 struct thread_trace *ttrace = thread__priv(thread); 1414 1415 if (ttrace == NULL || trace->fd_path_disabled) 1416 return NULL; 1417 1418 if (fd < 0) 1419 return NULL; 1420 1421 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1422 if (!trace->live) 1423 return NULL; 1424 ++trace->stats.proc_getname; 1425 if (thread__read_fd_path(thread, fd)) 1426 return NULL; 1427 } 1428 1429 return ttrace->files.table[fd].pathname; 1430 } 1431 1432 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1433 { 1434 int fd = arg->val; 1435 size_t printed = scnprintf(bf, size, "%d", fd); 1436 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1437 1438 if (path) 1439 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1440 1441 return printed; 1442 } 1443 1444 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1445 { 1446 size_t printed = scnprintf(bf, size, "%d", fd); 1447 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1448 1449 if (thread) { 1450 const char *path = thread__fd_path(thread, fd, trace); 1451 1452 if (path) 1453 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1454 1455 thread__put(thread); 1456 } 1457 1458 return printed; 1459 } 1460 1461 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1462 struct syscall_arg *arg) 1463 { 1464 int fd = arg->val; 1465 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1466 struct thread_trace *ttrace = thread__priv(arg->thread); 1467 1468 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1469 zfree(&ttrace->files.table[fd].pathname); 1470 1471 return printed; 1472 } 1473 1474 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1475 unsigned long ptr) 1476 { 1477 struct thread_trace *ttrace = thread__priv(thread); 1478 1479 ttrace->filename.ptr = ptr; 1480 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1481 } 1482 1483 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1484 { 1485 struct augmented_arg *augmented_arg = arg->augmented.args; 1486 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1487 /* 1488 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1489 * we would have two strings, each prefixed by its size. 1490 */ 1491 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1492 1493 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1494 arg->augmented.size -= consumed; 1495 1496 return printed; 1497 } 1498 1499 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1500 struct syscall_arg *arg) 1501 { 1502 unsigned long ptr = arg->val; 1503 1504 if (arg->augmented.args) 1505 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1506 1507 if (!arg->trace->vfs_getname) 1508 return scnprintf(bf, size, "%#x", ptr); 1509 1510 thread__set_filename_pos(arg->thread, bf, ptr); 1511 return 0; 1512 } 1513 1514 static bool trace__filter_duration(struct trace *trace, double t) 1515 { 1516 return t < (trace->duration_filter * NSEC_PER_MSEC); 1517 } 1518 1519 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1520 { 1521 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1522 1523 return fprintf(fp, "%10.3f ", ts); 1524 } 1525 1526 /* 1527 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1528 * using ttrace->entry_time for a thread that receives a sys_exit without 1529 * first having received a sys_enter ("poll" issued before tracing session 1530 * starts, lost sys_enter exit due to ring buffer overflow). 1531 */ 1532 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1533 { 1534 if (tstamp > 0) 1535 return __trace__fprintf_tstamp(trace, tstamp, fp); 1536 1537 return fprintf(fp, " ? "); 1538 } 1539 1540 static pid_t workload_pid = -1; 1541 static volatile sig_atomic_t done = false; 1542 static volatile sig_atomic_t interrupted = false; 1543 1544 static void sighandler_interrupt(int sig __maybe_unused) 1545 { 1546 done = interrupted = true; 1547 } 1548 1549 static void sighandler_chld(int sig __maybe_unused, siginfo_t *info, 1550 void *context __maybe_unused) 1551 { 1552 if (info->si_pid == workload_pid) 1553 done = true; 1554 } 1555 1556 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1557 { 1558 size_t printed = 0; 1559 1560 if (trace->multiple_threads) { 1561 if (trace->show_comm) 1562 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1563 printed += fprintf(fp, "%d ", thread__tid(thread)); 1564 } 1565 1566 return printed; 1567 } 1568 1569 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1570 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1571 { 1572 size_t printed = 0; 1573 1574 if (trace->show_tstamp) 1575 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1576 if (trace->show_duration) 1577 printed += fprintf_duration(duration, duration_calculated, fp); 1578 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1579 } 1580 1581 static int trace__process_event(struct trace *trace, struct machine *machine, 1582 union perf_event *event, struct perf_sample *sample) 1583 { 1584 int ret = 0; 1585 1586 switch (event->header.type) { 1587 case PERF_RECORD_LOST: 1588 color_fprintf(trace->output, PERF_COLOR_RED, 1589 "LOST %" PRIu64 " events!\n", event->lost.lost); 1590 ret = machine__process_lost_event(machine, event, sample); 1591 break; 1592 default: 1593 ret = machine__process_event(machine, event, sample); 1594 break; 1595 } 1596 1597 return ret; 1598 } 1599 1600 static int trace__tool_process(struct perf_tool *tool, 1601 union perf_event *event, 1602 struct perf_sample *sample, 1603 struct machine *machine) 1604 { 1605 struct trace *trace = container_of(tool, struct trace, tool); 1606 return trace__process_event(trace, machine, event, sample); 1607 } 1608 1609 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1610 { 1611 struct machine *machine = vmachine; 1612 1613 if (machine->kptr_restrict_warned) 1614 return NULL; 1615 1616 if (symbol_conf.kptr_restrict) { 1617 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1618 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 1619 "Kernel samples will not be resolved.\n"); 1620 machine->kptr_restrict_warned = true; 1621 return NULL; 1622 } 1623 1624 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1625 } 1626 1627 static int trace__symbols_init(struct trace *trace, struct evlist *evlist) 1628 { 1629 int err = symbol__init(NULL); 1630 1631 if (err) 1632 return err; 1633 1634 trace->host = machine__new_host(); 1635 if (trace->host == NULL) 1636 return -ENOMEM; 1637 1638 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1639 if (err < 0) 1640 goto out; 1641 1642 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1643 evlist->core.threads, trace__tool_process, 1644 true, false, 1); 1645 out: 1646 if (err) 1647 symbol__exit(); 1648 1649 return err; 1650 } 1651 1652 static void trace__symbols__exit(struct trace *trace) 1653 { 1654 machine__exit(trace->host); 1655 trace->host = NULL; 1656 1657 symbol__exit(); 1658 } 1659 1660 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1661 { 1662 int idx; 1663 1664 if (nr_args == RAW_SYSCALL_ARGS_NUM && sc->fmt && sc->fmt->nr_args != 0) 1665 nr_args = sc->fmt->nr_args; 1666 1667 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1668 if (sc->arg_fmt == NULL) 1669 return -1; 1670 1671 for (idx = 0; idx < nr_args; ++idx) { 1672 if (sc->fmt) 1673 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1674 } 1675 1676 sc->nr_args = nr_args; 1677 return 0; 1678 } 1679 1680 static const struct syscall_arg_fmt syscall_arg_fmts__by_name[] = { 1681 { .name = "msr", .scnprintf = SCA_X86_MSR, .strtoul = STUL_X86_MSR, }, 1682 { .name = "vector", .scnprintf = SCA_X86_IRQ_VECTORS, .strtoul = STUL_X86_IRQ_VECTORS, }, 1683 }; 1684 1685 static int syscall_arg_fmt__cmp(const void *name, const void *fmtp) 1686 { 1687 const struct syscall_arg_fmt *fmt = fmtp; 1688 return strcmp(name, fmt->name); 1689 } 1690 1691 static const struct syscall_arg_fmt * 1692 __syscall_arg_fmt__find_by_name(const struct syscall_arg_fmt *fmts, const int nmemb, 1693 const char *name) 1694 { 1695 return bsearch(name, fmts, nmemb, sizeof(struct syscall_arg_fmt), syscall_arg_fmt__cmp); 1696 } 1697 1698 static const struct syscall_arg_fmt *syscall_arg_fmt__find_by_name(const char *name) 1699 { 1700 const int nmemb = ARRAY_SIZE(syscall_arg_fmts__by_name); 1701 return __syscall_arg_fmt__find_by_name(syscall_arg_fmts__by_name, nmemb, name); 1702 } 1703 1704 static struct tep_format_field * 1705 syscall_arg_fmt__init_array(struct syscall_arg_fmt *arg, struct tep_format_field *field) 1706 { 1707 struct tep_format_field *last_field = NULL; 1708 int len; 1709 1710 for (; field; field = field->next, ++arg) { 1711 last_field = field; 1712 1713 if (arg->scnprintf) 1714 continue; 1715 1716 len = strlen(field->name); 1717 1718 if (strcmp(field->type, "const char *") == 0 && 1719 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1720 strstr(field->name, "path") != NULL)) 1721 arg->scnprintf = SCA_FILENAME; 1722 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1723 arg->scnprintf = SCA_PTR; 1724 else if (strcmp(field->type, "pid_t") == 0) 1725 arg->scnprintf = SCA_PID; 1726 else if (strcmp(field->type, "umode_t") == 0) 1727 arg->scnprintf = SCA_MODE_T; 1728 else if ((field->flags & TEP_FIELD_IS_ARRAY) && strstr(field->type, "char")) { 1729 arg->scnprintf = SCA_CHAR_ARRAY; 1730 arg->nr_entries = field->arraylen; 1731 } else if ((strcmp(field->type, "int") == 0 || 1732 strcmp(field->type, "unsigned int") == 0 || 1733 strcmp(field->type, "long") == 0) && 1734 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1735 /* 1736 * /sys/kernel/tracing/events/syscalls/sys_enter* 1737 * grep -E 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1738 * 65 int 1739 * 23 unsigned int 1740 * 7 unsigned long 1741 */ 1742 arg->scnprintf = SCA_FD; 1743 } else { 1744 const struct syscall_arg_fmt *fmt = 1745 syscall_arg_fmt__find_by_name(field->name); 1746 1747 if (fmt) { 1748 arg->scnprintf = fmt->scnprintf; 1749 arg->strtoul = fmt->strtoul; 1750 } 1751 } 1752 } 1753 1754 return last_field; 1755 } 1756 1757 static int syscall__set_arg_fmts(struct syscall *sc) 1758 { 1759 struct tep_format_field *last_field = syscall_arg_fmt__init_array(sc->arg_fmt, sc->args); 1760 1761 if (last_field) 1762 sc->args_size = last_field->offset + last_field->size; 1763 1764 return 0; 1765 } 1766 1767 static int trace__read_syscall_info(struct trace *trace, int id) 1768 { 1769 char tp_name[128]; 1770 struct syscall *sc; 1771 const char *name = syscalltbl__name(trace->sctbl, id); 1772 1773 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 1774 if (trace->syscalls.table == NULL) { 1775 trace->syscalls.table = calloc(trace->sctbl->syscalls.max_id + 1, sizeof(*sc)); 1776 if (trace->syscalls.table == NULL) 1777 return -ENOMEM; 1778 } 1779 #else 1780 if (id > trace->sctbl->syscalls.max_id || (id == 0 && trace->syscalls.table == NULL)) { 1781 // When using libaudit we don't know beforehand what is the max syscall id 1782 struct syscall *table = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1783 1784 if (table == NULL) 1785 return -ENOMEM; 1786 1787 // Need to memset from offset 0 and +1 members if brand new 1788 if (trace->syscalls.table == NULL) 1789 memset(table, 0, (id + 1) * sizeof(*sc)); 1790 else 1791 memset(table + trace->sctbl->syscalls.max_id + 1, 0, (id - trace->sctbl->syscalls.max_id) * sizeof(*sc)); 1792 1793 trace->syscalls.table = table; 1794 trace->sctbl->syscalls.max_id = id; 1795 } 1796 #endif 1797 sc = trace->syscalls.table + id; 1798 if (sc->nonexistent) 1799 return -EEXIST; 1800 1801 if (name == NULL) { 1802 sc->nonexistent = true; 1803 return -EEXIST; 1804 } 1805 1806 sc->name = name; 1807 sc->fmt = syscall_fmt__find(sc->name); 1808 1809 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1810 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1811 1812 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1813 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1814 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1815 } 1816 1817 /* 1818 * Fails to read trace point format via sysfs node, so the trace point 1819 * doesn't exist. Set the 'nonexistent' flag as true. 1820 */ 1821 if (IS_ERR(sc->tp_format)) { 1822 sc->nonexistent = true; 1823 return PTR_ERR(sc->tp_format); 1824 } 1825 1826 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 1827 RAW_SYSCALL_ARGS_NUM : sc->tp_format->format.nr_fields)) 1828 return -ENOMEM; 1829 1830 sc->args = sc->tp_format->format.fields; 1831 /* 1832 * We need to check and discard the first variable '__syscall_nr' 1833 * or 'nr' that mean the syscall number. It is needless here. 1834 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1835 */ 1836 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1837 sc->args = sc->args->next; 1838 --sc->nr_args; 1839 } 1840 1841 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1842 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1843 1844 return syscall__set_arg_fmts(sc); 1845 } 1846 1847 static int evsel__init_tp_arg_scnprintf(struct evsel *evsel) 1848 { 1849 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 1850 1851 if (fmt != NULL) { 1852 syscall_arg_fmt__init_array(fmt, evsel->tp_format->format.fields); 1853 return 0; 1854 } 1855 1856 return -ENOMEM; 1857 } 1858 1859 static int intcmp(const void *a, const void *b) 1860 { 1861 const int *one = a, *another = b; 1862 1863 return *one - *another; 1864 } 1865 1866 static int trace__validate_ev_qualifier(struct trace *trace) 1867 { 1868 int err = 0; 1869 bool printed_invalid_prefix = false; 1870 struct str_node *pos; 1871 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1872 1873 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1874 sizeof(trace->ev_qualifier_ids.entries[0])); 1875 1876 if (trace->ev_qualifier_ids.entries == NULL) { 1877 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1878 trace->output); 1879 err = -EINVAL; 1880 goto out; 1881 } 1882 1883 strlist__for_each_entry(pos, trace->ev_qualifier) { 1884 const char *sc = pos->s; 1885 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1886 1887 if (id < 0) { 1888 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1889 if (id >= 0) 1890 goto matches; 1891 1892 if (!printed_invalid_prefix) { 1893 pr_debug("Skipping unknown syscalls: "); 1894 printed_invalid_prefix = true; 1895 } else { 1896 pr_debug(", "); 1897 } 1898 1899 pr_debug("%s", sc); 1900 continue; 1901 } 1902 matches: 1903 trace->ev_qualifier_ids.entries[nr_used++] = id; 1904 if (match_next == -1) 1905 continue; 1906 1907 while (1) { 1908 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1909 if (id < 0) 1910 break; 1911 if (nr_allocated == nr_used) { 1912 void *entries; 1913 1914 nr_allocated += 8; 1915 entries = realloc(trace->ev_qualifier_ids.entries, 1916 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1917 if (entries == NULL) { 1918 err = -ENOMEM; 1919 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1920 goto out_free; 1921 } 1922 trace->ev_qualifier_ids.entries = entries; 1923 } 1924 trace->ev_qualifier_ids.entries[nr_used++] = id; 1925 } 1926 } 1927 1928 trace->ev_qualifier_ids.nr = nr_used; 1929 qsort(trace->ev_qualifier_ids.entries, nr_used, sizeof(int), intcmp); 1930 out: 1931 if (printed_invalid_prefix) 1932 pr_debug("\n"); 1933 return err; 1934 out_free: 1935 zfree(&trace->ev_qualifier_ids.entries); 1936 trace->ev_qualifier_ids.nr = 0; 1937 goto out; 1938 } 1939 1940 static __maybe_unused bool trace__syscall_enabled(struct trace *trace, int id) 1941 { 1942 bool in_ev_qualifier; 1943 1944 if (trace->ev_qualifier_ids.nr == 0) 1945 return true; 1946 1947 in_ev_qualifier = bsearch(&id, trace->ev_qualifier_ids.entries, 1948 trace->ev_qualifier_ids.nr, sizeof(int), intcmp) != NULL; 1949 1950 if (in_ev_qualifier) 1951 return !trace->not_ev_qualifier; 1952 1953 return trace->not_ev_qualifier; 1954 } 1955 1956 /* 1957 * args is to be interpreted as a series of longs but we need to handle 1958 * 8-byte unaligned accesses. args points to raw_data within the event 1959 * and raw_data is guaranteed to be 8-byte unaligned because it is 1960 * preceded by raw_size which is a u32. So we need to copy args to a temp 1961 * variable to read it. Most notably this avoids extended load instructions 1962 * on unaligned addresses 1963 */ 1964 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1965 { 1966 unsigned long val; 1967 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1968 1969 memcpy(&val, p, sizeof(val)); 1970 return val; 1971 } 1972 1973 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1974 struct syscall_arg *arg) 1975 { 1976 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1977 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1978 1979 return scnprintf(bf, size, "arg%d: ", arg->idx); 1980 } 1981 1982 /* 1983 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1984 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1985 * in tools/perf/trace/beauty/mount_flags.c 1986 */ 1987 static unsigned long syscall_arg_fmt__mask_val(struct syscall_arg_fmt *fmt, struct syscall_arg *arg, unsigned long val) 1988 { 1989 if (fmt && fmt->mask_val) 1990 return fmt->mask_val(arg, val); 1991 1992 return val; 1993 } 1994 1995 static size_t syscall_arg_fmt__scnprintf_val(struct syscall_arg_fmt *fmt, char *bf, size_t size, 1996 struct syscall_arg *arg, unsigned long val) 1997 { 1998 if (fmt && fmt->scnprintf) { 1999 arg->val = val; 2000 if (fmt->parm) 2001 arg->parm = fmt->parm; 2002 return fmt->scnprintf(bf, size, arg); 2003 } 2004 return scnprintf(bf, size, "%ld", val); 2005 } 2006 2007 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 2008 unsigned char *args, void *augmented_args, int augmented_args_size, 2009 struct trace *trace, struct thread *thread) 2010 { 2011 size_t printed = 0; 2012 unsigned long val; 2013 u8 bit = 1; 2014 struct syscall_arg arg = { 2015 .args = args, 2016 .augmented = { 2017 .size = augmented_args_size, 2018 .args = augmented_args, 2019 }, 2020 .idx = 0, 2021 .mask = 0, 2022 .trace = trace, 2023 .thread = thread, 2024 .show_string_prefix = trace->show_string_prefix, 2025 }; 2026 struct thread_trace *ttrace = thread__priv(thread); 2027 2028 /* 2029 * Things like fcntl will set this in its 'cmd' formatter to pick the 2030 * right formatter for the return value (an fd? file flags?), which is 2031 * not needed for syscalls that always return a given type, say an fd. 2032 */ 2033 ttrace->ret_scnprintf = NULL; 2034 2035 if (sc->args != NULL) { 2036 struct tep_format_field *field; 2037 2038 for (field = sc->args; field; 2039 field = field->next, ++arg.idx, bit <<= 1) { 2040 if (arg.mask & bit) 2041 continue; 2042 2043 arg.fmt = &sc->arg_fmt[arg.idx]; 2044 val = syscall_arg__val(&arg, arg.idx); 2045 /* 2046 * Some syscall args need some mask, most don't and 2047 * return val untouched. 2048 */ 2049 val = syscall_arg_fmt__mask_val(&sc->arg_fmt[arg.idx], &arg, val); 2050 2051 /* 2052 * Suppress this argument if its value is zero and 2053 * and we don't have a string associated in an 2054 * strarray for it. 2055 */ 2056 if (val == 0 && 2057 !trace->show_zeros && 2058 !(sc->arg_fmt && 2059 (sc->arg_fmt[arg.idx].show_zero || 2060 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 2061 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 2062 sc->arg_fmt[arg.idx].parm)) 2063 continue; 2064 2065 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2066 2067 if (trace->show_arg_names) 2068 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2069 2070 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], 2071 bf + printed, size - printed, &arg, val); 2072 } 2073 } else if (IS_ERR(sc->tp_format)) { 2074 /* 2075 * If we managed to read the tracepoint /format file, then we 2076 * may end up not having any args, like with gettid(), so only 2077 * print the raw args when we didn't manage to read it. 2078 */ 2079 while (arg.idx < sc->nr_args) { 2080 if (arg.mask & bit) 2081 goto next_arg; 2082 val = syscall_arg__val(&arg, arg.idx); 2083 if (printed) 2084 printed += scnprintf(bf + printed, size - printed, ", "); 2085 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 2086 printed += syscall_arg_fmt__scnprintf_val(&sc->arg_fmt[arg.idx], bf + printed, size - printed, &arg, val); 2087 next_arg: 2088 ++arg.idx; 2089 bit <<= 1; 2090 } 2091 } 2092 2093 return printed; 2094 } 2095 2096 typedef int (*tracepoint_handler)(struct trace *trace, struct evsel *evsel, 2097 union perf_event *event, 2098 struct perf_sample *sample); 2099 2100 static struct syscall *trace__syscall_info(struct trace *trace, 2101 struct evsel *evsel, int id) 2102 { 2103 int err = 0; 2104 2105 if (id < 0) { 2106 2107 /* 2108 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 2109 * before that, leaving at a higher verbosity level till that is 2110 * explained. Reproduced with plain ftrace with: 2111 * 2112 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 2113 * grep "NR -1 " /t/trace_pipe 2114 * 2115 * After generating some load on the machine. 2116 */ 2117 if (verbose > 1) { 2118 static u64 n; 2119 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 2120 id, evsel__name(evsel), ++n); 2121 } 2122 return NULL; 2123 } 2124 2125 err = -EINVAL; 2126 2127 #ifdef HAVE_SYSCALL_TABLE_SUPPORT 2128 if (id > trace->sctbl->syscalls.max_id) { 2129 #else 2130 if (id >= trace->sctbl->syscalls.max_id) { 2131 /* 2132 * With libaudit we don't know beforehand what is the max_id, 2133 * so we let trace__read_syscall_info() figure that out as we 2134 * go on reading syscalls. 2135 */ 2136 err = trace__read_syscall_info(trace, id); 2137 if (err) 2138 #endif 2139 goto out_cant_read; 2140 } 2141 2142 if ((trace->syscalls.table == NULL || trace->syscalls.table[id].name == NULL) && 2143 (err = trace__read_syscall_info(trace, id)) != 0) 2144 goto out_cant_read; 2145 2146 if (trace->syscalls.table && trace->syscalls.table[id].nonexistent) 2147 goto out_cant_read; 2148 2149 return &trace->syscalls.table[id]; 2150 2151 out_cant_read: 2152 if (verbose > 0) { 2153 char sbuf[STRERR_BUFSIZE]; 2154 fprintf(trace->output, "Problems reading syscall %d: %d (%s)", id, -err, str_error_r(-err, sbuf, sizeof(sbuf))); 2155 if (id <= trace->sctbl->syscalls.max_id && trace->syscalls.table[id].name != NULL) 2156 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 2157 fputs(" information\n", trace->output); 2158 } 2159 return NULL; 2160 } 2161 2162 struct syscall_stats { 2163 struct stats stats; 2164 u64 nr_failures; 2165 int max_errno; 2166 u32 *errnos; 2167 }; 2168 2169 static void thread__update_stats(struct thread *thread, struct thread_trace *ttrace, 2170 int id, struct perf_sample *sample, long err, bool errno_summary) 2171 { 2172 struct int_node *inode; 2173 struct syscall_stats *stats; 2174 u64 duration = 0; 2175 2176 inode = intlist__findnew(ttrace->syscall_stats, id); 2177 if (inode == NULL) 2178 return; 2179 2180 stats = inode->priv; 2181 if (stats == NULL) { 2182 stats = zalloc(sizeof(*stats)); 2183 if (stats == NULL) 2184 return; 2185 2186 init_stats(&stats->stats); 2187 inode->priv = stats; 2188 } 2189 2190 if (ttrace->entry_time && sample->time > ttrace->entry_time) 2191 duration = sample->time - ttrace->entry_time; 2192 2193 update_stats(&stats->stats, duration); 2194 2195 if (err < 0) { 2196 ++stats->nr_failures; 2197 2198 if (!errno_summary) 2199 return; 2200 2201 err = -err; 2202 if (err > stats->max_errno) { 2203 u32 *new_errnos = realloc(stats->errnos, err * sizeof(u32)); 2204 2205 if (new_errnos) { 2206 memset(new_errnos + stats->max_errno, 0, (err - stats->max_errno) * sizeof(u32)); 2207 } else { 2208 pr_debug("Not enough memory for errno stats for thread \"%s\"(%d/%d), results will be incomplete\n", 2209 thread__comm_str(thread), thread__pid(thread), 2210 thread__tid(thread)); 2211 return; 2212 } 2213 2214 stats->errnos = new_errnos; 2215 stats->max_errno = err; 2216 } 2217 2218 ++stats->errnos[err - 1]; 2219 } 2220 } 2221 2222 static int trace__printf_interrupted_entry(struct trace *trace) 2223 { 2224 struct thread_trace *ttrace; 2225 size_t printed; 2226 int len; 2227 2228 if (trace->failure_only || trace->current == NULL) 2229 return 0; 2230 2231 ttrace = thread__priv(trace->current); 2232 2233 if (!ttrace->entry_pending) 2234 return 0; 2235 2236 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 2237 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 2238 2239 if (len < trace->args_alignment - 4) 2240 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 2241 2242 printed += fprintf(trace->output, " ...\n"); 2243 2244 ttrace->entry_pending = false; 2245 ++trace->nr_events_printed; 2246 2247 return printed; 2248 } 2249 2250 static int trace__fprintf_sample(struct trace *trace, struct evsel *evsel, 2251 struct perf_sample *sample, struct thread *thread) 2252 { 2253 int printed = 0; 2254 2255 if (trace->print_sample) { 2256 double ts = (double)sample->time / NSEC_PER_MSEC; 2257 2258 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 2259 evsel__name(evsel), ts, 2260 thread__comm_str(thread), 2261 sample->pid, sample->tid, sample->cpu); 2262 } 2263 2264 return printed; 2265 } 2266 2267 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 2268 { 2269 void *augmented_args = NULL; 2270 /* 2271 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 2272 * and there we get all 6 syscall args plus the tracepoint common fields 2273 * that gets calculated at the start and the syscall_nr (another long). 2274 * So we check if that is the case and if so don't look after the 2275 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 2276 * which is fixed. 2277 * 2278 * We'll revisit this later to pass s->args_size to the BPF augmenter 2279 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 2280 * copies only what we need for each syscall, like what happens when we 2281 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 2282 * traffic to just what is needed for each syscall. 2283 */ 2284 int args_size = raw_augmented_args_size ?: sc->args_size; 2285 2286 *augmented_args_size = sample->raw_size - args_size; 2287 if (*augmented_args_size > 0) 2288 augmented_args = sample->raw_data + args_size; 2289 2290 return augmented_args; 2291 } 2292 2293 static void syscall__exit(struct syscall *sc) 2294 { 2295 if (!sc) 2296 return; 2297 2298 zfree(&sc->arg_fmt); 2299 } 2300 2301 static int trace__sys_enter(struct trace *trace, struct evsel *evsel, 2302 union perf_event *event __maybe_unused, 2303 struct perf_sample *sample) 2304 { 2305 char *msg; 2306 void *args; 2307 int printed = 0; 2308 struct thread *thread; 2309 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2310 int augmented_args_size = 0; 2311 void *augmented_args = NULL; 2312 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2313 struct thread_trace *ttrace; 2314 2315 if (sc == NULL) 2316 return -1; 2317 2318 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2319 ttrace = thread__trace(thread, trace->output); 2320 if (ttrace == NULL) 2321 goto out_put; 2322 2323 trace__fprintf_sample(trace, evsel, sample, thread); 2324 2325 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2326 2327 if (ttrace->entry_str == NULL) { 2328 ttrace->entry_str = malloc(trace__entry_str_size); 2329 if (!ttrace->entry_str) 2330 goto out_put; 2331 } 2332 2333 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 2334 trace__printf_interrupted_entry(trace); 2335 /* 2336 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 2337 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 2338 * this breaks syscall__augmented_args() check for augmented args, as we calculate 2339 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 2340 * so when handling, say the openat syscall, we end up getting 6 args for the 2341 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 2342 * thinking that the extra 2 u64 args are the augmented filename, so just check 2343 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 2344 */ 2345 if (evsel != trace->syscalls.events.sys_enter) 2346 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2347 ttrace->entry_time = sample->time; 2348 msg = ttrace->entry_str; 2349 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 2350 2351 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 2352 args, augmented_args, augmented_args_size, trace, thread); 2353 2354 if (sc->is_exit) { 2355 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 2356 int alignment = 0; 2357 2358 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 2359 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 2360 if (trace->args_alignment > printed) 2361 alignment = trace->args_alignment - printed; 2362 fprintf(trace->output, "%*s= ?\n", alignment, " "); 2363 } 2364 } else { 2365 ttrace->entry_pending = true; 2366 /* See trace__vfs_getname & trace__sys_exit */ 2367 ttrace->filename.pending_open = false; 2368 } 2369 2370 if (trace->current != thread) { 2371 thread__put(trace->current); 2372 trace->current = thread__get(thread); 2373 } 2374 err = 0; 2375 out_put: 2376 thread__put(thread); 2377 return err; 2378 } 2379 2380 static int trace__fprintf_sys_enter(struct trace *trace, struct evsel *evsel, 2381 struct perf_sample *sample) 2382 { 2383 struct thread_trace *ttrace; 2384 struct thread *thread; 2385 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 2386 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2387 char msg[1024]; 2388 void *args, *augmented_args = NULL; 2389 int augmented_args_size; 2390 2391 if (sc == NULL) 2392 return -1; 2393 2394 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2395 ttrace = thread__trace(thread, trace->output); 2396 /* 2397 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 2398 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 2399 */ 2400 if (ttrace == NULL) 2401 goto out_put; 2402 2403 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 2404 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 2405 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 2406 fprintf(trace->output, "%s", msg); 2407 err = 0; 2408 out_put: 2409 thread__put(thread); 2410 return err; 2411 } 2412 2413 static int trace__resolve_callchain(struct trace *trace, struct evsel *evsel, 2414 struct perf_sample *sample, 2415 struct callchain_cursor *cursor) 2416 { 2417 struct addr_location al; 2418 int max_stack = evsel->core.attr.sample_max_stack ? 2419 evsel->core.attr.sample_max_stack : 2420 trace->max_stack; 2421 int err = -1; 2422 2423 addr_location__init(&al); 2424 if (machine__resolve(trace->host, &al, sample) < 0) 2425 goto out; 2426 2427 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2428 out: 2429 addr_location__exit(&al); 2430 return err; 2431 } 2432 2433 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2434 { 2435 /* TODO: user-configurable print_opts */ 2436 const unsigned int print_opts = EVSEL__PRINT_SYM | 2437 EVSEL__PRINT_DSO | 2438 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2439 2440 return sample__fprintf_callchain(sample, 38, print_opts, get_tls_callchain_cursor(), symbol_conf.bt_stop_list, trace->output); 2441 } 2442 2443 static const char *errno_to_name(struct evsel *evsel, int err) 2444 { 2445 struct perf_env *env = evsel__env(evsel); 2446 const char *arch_name = perf_env__arch(env); 2447 2448 return arch_syscalls__strerrno(arch_name, err); 2449 } 2450 2451 static int trace__sys_exit(struct trace *trace, struct evsel *evsel, 2452 union perf_event *event __maybe_unused, 2453 struct perf_sample *sample) 2454 { 2455 long ret; 2456 u64 duration = 0; 2457 bool duration_calculated = false; 2458 struct thread *thread; 2459 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2460 int alignment = trace->args_alignment; 2461 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2462 struct thread_trace *ttrace; 2463 2464 if (sc == NULL) 2465 return -1; 2466 2467 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2468 ttrace = thread__trace(thread, trace->output); 2469 if (ttrace == NULL) 2470 goto out_put; 2471 2472 trace__fprintf_sample(trace, evsel, sample, thread); 2473 2474 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2475 2476 if (trace->summary) 2477 thread__update_stats(thread, ttrace, id, sample, ret, trace->errno_summary); 2478 2479 if (!trace->fd_path_disabled && sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2480 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2481 ttrace->filename.pending_open = false; 2482 ++trace->stats.vfs_getname; 2483 } 2484 2485 if (ttrace->entry_time) { 2486 duration = sample->time - ttrace->entry_time; 2487 if (trace__filter_duration(trace, duration)) 2488 goto out; 2489 duration_calculated = true; 2490 } else if (trace->duration_filter) 2491 goto out; 2492 2493 if (sample->callchain) { 2494 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2495 2496 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2497 if (callchain_ret == 0) { 2498 if (cursor->nr < trace->min_stack) 2499 goto out; 2500 callchain_ret = 1; 2501 } 2502 } 2503 2504 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2505 goto out; 2506 2507 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2508 2509 if (ttrace->entry_pending) { 2510 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2511 } else { 2512 printed += fprintf(trace->output, " ... ["); 2513 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2514 printed += 9; 2515 printed += fprintf(trace->output, "]: %s()", sc->name); 2516 } 2517 2518 printed++; /* the closing ')' */ 2519 2520 if (alignment > printed) 2521 alignment -= printed; 2522 else 2523 alignment = 0; 2524 2525 fprintf(trace->output, ")%*s= ", alignment, " "); 2526 2527 if (sc->fmt == NULL) { 2528 if (ret < 0) 2529 goto errno_print; 2530 signed_print: 2531 fprintf(trace->output, "%ld", ret); 2532 } else if (ret < 0) { 2533 errno_print: { 2534 char bf[STRERR_BUFSIZE]; 2535 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2536 *e = errno_to_name(evsel, -ret); 2537 2538 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2539 } 2540 } else if (ret == 0 && sc->fmt->timeout) 2541 fprintf(trace->output, "0 (Timeout)"); 2542 else if (ttrace->ret_scnprintf) { 2543 char bf[1024]; 2544 struct syscall_arg arg = { 2545 .val = ret, 2546 .thread = thread, 2547 .trace = trace, 2548 }; 2549 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2550 ttrace->ret_scnprintf = NULL; 2551 fprintf(trace->output, "%s", bf); 2552 } else if (sc->fmt->hexret) 2553 fprintf(trace->output, "%#lx", ret); 2554 else if (sc->fmt->errpid) { 2555 struct thread *child = machine__find_thread(trace->host, ret, ret); 2556 2557 if (child != NULL) { 2558 fprintf(trace->output, "%ld", ret); 2559 if (thread__comm_set(child)) 2560 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2561 thread__put(child); 2562 } 2563 } else 2564 goto signed_print; 2565 2566 fputc('\n', trace->output); 2567 2568 /* 2569 * We only consider an 'event' for the sake of --max-events a non-filtered 2570 * sys_enter + sys_exit and other tracepoint events. 2571 */ 2572 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2573 interrupted = true; 2574 2575 if (callchain_ret > 0) 2576 trace__fprintf_callchain(trace, sample); 2577 else if (callchain_ret < 0) 2578 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2579 out: 2580 ttrace->entry_pending = false; 2581 err = 0; 2582 out_put: 2583 thread__put(thread); 2584 return err; 2585 } 2586 2587 static int trace__vfs_getname(struct trace *trace, struct evsel *evsel, 2588 union perf_event *event __maybe_unused, 2589 struct perf_sample *sample) 2590 { 2591 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2592 struct thread_trace *ttrace; 2593 size_t filename_len, entry_str_len, to_move; 2594 ssize_t remaining_space; 2595 char *pos; 2596 const char *filename = evsel__rawptr(evsel, sample, "pathname"); 2597 2598 if (!thread) 2599 goto out; 2600 2601 ttrace = thread__priv(thread); 2602 if (!ttrace) 2603 goto out_put; 2604 2605 filename_len = strlen(filename); 2606 if (filename_len == 0) 2607 goto out_put; 2608 2609 if (ttrace->filename.namelen < filename_len) { 2610 char *f = realloc(ttrace->filename.name, filename_len + 1); 2611 2612 if (f == NULL) 2613 goto out_put; 2614 2615 ttrace->filename.namelen = filename_len; 2616 ttrace->filename.name = f; 2617 } 2618 2619 strcpy(ttrace->filename.name, filename); 2620 ttrace->filename.pending_open = true; 2621 2622 if (!ttrace->filename.ptr) 2623 goto out_put; 2624 2625 entry_str_len = strlen(ttrace->entry_str); 2626 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2627 if (remaining_space <= 0) 2628 goto out_put; 2629 2630 if (filename_len > (size_t)remaining_space) { 2631 filename += filename_len - remaining_space; 2632 filename_len = remaining_space; 2633 } 2634 2635 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2636 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2637 memmove(pos + filename_len, pos, to_move); 2638 memcpy(pos, filename, filename_len); 2639 2640 ttrace->filename.ptr = 0; 2641 ttrace->filename.entry_str_pos = 0; 2642 out_put: 2643 thread__put(thread); 2644 out: 2645 return 0; 2646 } 2647 2648 static int trace__sched_stat_runtime(struct trace *trace, struct evsel *evsel, 2649 union perf_event *event __maybe_unused, 2650 struct perf_sample *sample) 2651 { 2652 u64 runtime = evsel__intval(evsel, sample, "runtime"); 2653 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2654 struct thread *thread = machine__findnew_thread(trace->host, 2655 sample->pid, 2656 sample->tid); 2657 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2658 2659 if (ttrace == NULL) 2660 goto out_dump; 2661 2662 ttrace->runtime_ms += runtime_ms; 2663 trace->runtime_ms += runtime_ms; 2664 out_put: 2665 thread__put(thread); 2666 return 0; 2667 2668 out_dump: 2669 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2670 evsel->name, 2671 evsel__strval(evsel, sample, "comm"), 2672 (pid_t)evsel__intval(evsel, sample, "pid"), 2673 runtime, 2674 evsel__intval(evsel, sample, "vruntime")); 2675 goto out_put; 2676 } 2677 2678 static int bpf_output__printer(enum binary_printer_ops op, 2679 unsigned int val, void *extra __maybe_unused, FILE *fp) 2680 { 2681 unsigned char ch = (unsigned char)val; 2682 2683 switch (op) { 2684 case BINARY_PRINT_CHAR_DATA: 2685 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2686 case BINARY_PRINT_DATA_BEGIN: 2687 case BINARY_PRINT_LINE_BEGIN: 2688 case BINARY_PRINT_ADDR: 2689 case BINARY_PRINT_NUM_DATA: 2690 case BINARY_PRINT_NUM_PAD: 2691 case BINARY_PRINT_SEP: 2692 case BINARY_PRINT_CHAR_PAD: 2693 case BINARY_PRINT_LINE_END: 2694 case BINARY_PRINT_DATA_END: 2695 default: 2696 break; 2697 } 2698 2699 return 0; 2700 } 2701 2702 static void bpf_output__fprintf(struct trace *trace, 2703 struct perf_sample *sample) 2704 { 2705 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2706 bpf_output__printer, NULL, trace->output); 2707 ++trace->nr_events_printed; 2708 } 2709 2710 static size_t trace__fprintf_tp_fields(struct trace *trace, struct evsel *evsel, struct perf_sample *sample, 2711 struct thread *thread, void *augmented_args, int augmented_args_size) 2712 { 2713 char bf[2048]; 2714 size_t size = sizeof(bf); 2715 struct tep_format_field *field = evsel->tp_format->format.fields; 2716 struct syscall_arg_fmt *arg = __evsel__syscall_arg_fmt(evsel); 2717 size_t printed = 0; 2718 unsigned long val; 2719 u8 bit = 1; 2720 struct syscall_arg syscall_arg = { 2721 .augmented = { 2722 .size = augmented_args_size, 2723 .args = augmented_args, 2724 }, 2725 .idx = 0, 2726 .mask = 0, 2727 .trace = trace, 2728 .thread = thread, 2729 .show_string_prefix = trace->show_string_prefix, 2730 }; 2731 2732 for (; field && arg; field = field->next, ++syscall_arg.idx, bit <<= 1, ++arg) { 2733 if (syscall_arg.mask & bit) 2734 continue; 2735 2736 syscall_arg.len = 0; 2737 syscall_arg.fmt = arg; 2738 if (field->flags & TEP_FIELD_IS_ARRAY) { 2739 int offset = field->offset; 2740 2741 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 2742 offset = format_field__intval(field, sample, evsel->needs_swap); 2743 syscall_arg.len = offset >> 16; 2744 offset &= 0xffff; 2745 if (tep_field_is_relative(field->flags)) 2746 offset += field->offset + field->size; 2747 } 2748 2749 val = (uintptr_t)(sample->raw_data + offset); 2750 } else 2751 val = format_field__intval(field, sample, evsel->needs_swap); 2752 /* 2753 * Some syscall args need some mask, most don't and 2754 * return val untouched. 2755 */ 2756 val = syscall_arg_fmt__mask_val(arg, &syscall_arg, val); 2757 2758 /* 2759 * Suppress this argument if its value is zero and 2760 * we don't have a string associated in an 2761 * strarray for it. 2762 */ 2763 if (val == 0 && 2764 !trace->show_zeros && 2765 !((arg->show_zero || 2766 arg->scnprintf == SCA_STRARRAY || 2767 arg->scnprintf == SCA_STRARRAYS) && 2768 arg->parm)) 2769 continue; 2770 2771 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 2772 2773 if (trace->show_arg_names) 2774 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 2775 2776 printed += syscall_arg_fmt__scnprintf_val(arg, bf + printed, size - printed, &syscall_arg, val); 2777 } 2778 2779 return printed + fprintf(trace->output, "%s", bf); 2780 } 2781 2782 static int trace__event_handler(struct trace *trace, struct evsel *evsel, 2783 union perf_event *event __maybe_unused, 2784 struct perf_sample *sample) 2785 { 2786 struct thread *thread; 2787 int callchain_ret = 0; 2788 /* 2789 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2790 * this event's max_events having been hit and this is an entry coming 2791 * from the ring buffer that we should discard, since the max events 2792 * have already been considered/printed. 2793 */ 2794 if (evsel->disabled) 2795 return 0; 2796 2797 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2798 2799 if (sample->callchain) { 2800 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2801 2802 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2803 if (callchain_ret == 0) { 2804 if (cursor->nr < trace->min_stack) 2805 goto out; 2806 callchain_ret = 1; 2807 } 2808 } 2809 2810 trace__printf_interrupted_entry(trace); 2811 trace__fprintf_tstamp(trace, sample->time, trace->output); 2812 2813 if (trace->trace_syscalls && trace->show_duration) 2814 fprintf(trace->output, "( ): "); 2815 2816 if (thread) 2817 trace__fprintf_comm_tid(trace, thread, trace->output); 2818 2819 if (evsel == trace->syscalls.events.augmented) { 2820 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2821 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2822 2823 if (sc) { 2824 fprintf(trace->output, "%s(", sc->name); 2825 trace__fprintf_sys_enter(trace, evsel, sample); 2826 fputc(')', trace->output); 2827 goto newline; 2828 } 2829 2830 /* 2831 * XXX: Not having the associated syscall info or not finding/adding 2832 * the thread should never happen, but if it does... 2833 * fall thru and print it as a bpf_output event. 2834 */ 2835 } 2836 2837 fprintf(trace->output, "%s(", evsel->name); 2838 2839 if (evsel__is_bpf_output(evsel)) { 2840 bpf_output__fprintf(trace, sample); 2841 } else if (evsel->tp_format) { 2842 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2843 trace__fprintf_sys_enter(trace, evsel, sample)) { 2844 if (trace->libtraceevent_print) { 2845 event_format__fprintf(evsel->tp_format, sample->cpu, 2846 sample->raw_data, sample->raw_size, 2847 trace->output); 2848 } else { 2849 trace__fprintf_tp_fields(trace, evsel, sample, thread, NULL, 0); 2850 } 2851 } 2852 } 2853 2854 newline: 2855 fprintf(trace->output, ")\n"); 2856 2857 if (callchain_ret > 0) 2858 trace__fprintf_callchain(trace, sample); 2859 else if (callchain_ret < 0) 2860 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2861 2862 ++trace->nr_events_printed; 2863 2864 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2865 evsel__disable(evsel); 2866 evsel__close(evsel); 2867 } 2868 out: 2869 thread__put(thread); 2870 return 0; 2871 } 2872 2873 static void print_location(FILE *f, struct perf_sample *sample, 2874 struct addr_location *al, 2875 bool print_dso, bool print_sym) 2876 { 2877 2878 if ((verbose > 0 || print_dso) && al->map) 2879 fprintf(f, "%s@", map__dso(al->map)->long_name); 2880 2881 if ((verbose > 0 || print_sym) && al->sym) 2882 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2883 al->addr - al->sym->start); 2884 else if (al->map) 2885 fprintf(f, "0x%" PRIx64, al->addr); 2886 else 2887 fprintf(f, "0x%" PRIx64, sample->addr); 2888 } 2889 2890 static int trace__pgfault(struct trace *trace, 2891 struct evsel *evsel, 2892 union perf_event *event __maybe_unused, 2893 struct perf_sample *sample) 2894 { 2895 struct thread *thread; 2896 struct addr_location al; 2897 char map_type = 'd'; 2898 struct thread_trace *ttrace; 2899 int err = -1; 2900 int callchain_ret = 0; 2901 2902 addr_location__init(&al); 2903 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2904 2905 if (sample->callchain) { 2906 struct callchain_cursor *cursor = get_tls_callchain_cursor(); 2907 2908 callchain_ret = trace__resolve_callchain(trace, evsel, sample, cursor); 2909 if (callchain_ret == 0) { 2910 if (cursor->nr < trace->min_stack) 2911 goto out_put; 2912 callchain_ret = 1; 2913 } 2914 } 2915 2916 ttrace = thread__trace(thread, trace->output); 2917 if (ttrace == NULL) 2918 goto out_put; 2919 2920 if (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2921 ttrace->pfmaj++; 2922 else 2923 ttrace->pfmin++; 2924 2925 if (trace->summary_only) 2926 goto out; 2927 2928 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2929 2930 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2931 2932 fprintf(trace->output, "%sfault [", 2933 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2934 "maj" : "min"); 2935 2936 print_location(trace->output, sample, &al, false, true); 2937 2938 fprintf(trace->output, "] => "); 2939 2940 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2941 2942 if (!al.map) { 2943 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2944 2945 if (al.map) 2946 map_type = 'x'; 2947 else 2948 map_type = '?'; 2949 } 2950 2951 print_location(trace->output, sample, &al, true, false); 2952 2953 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2954 2955 if (callchain_ret > 0) 2956 trace__fprintf_callchain(trace, sample); 2957 else if (callchain_ret < 0) 2958 pr_err("Problem processing %s callchain, skipping...\n", evsel__name(evsel)); 2959 2960 ++trace->nr_events_printed; 2961 out: 2962 err = 0; 2963 out_put: 2964 thread__put(thread); 2965 addr_location__exit(&al); 2966 return err; 2967 } 2968 2969 static void trace__set_base_time(struct trace *trace, 2970 struct evsel *evsel, 2971 struct perf_sample *sample) 2972 { 2973 /* 2974 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2975 * and don't use sample->time unconditionally, we may end up having 2976 * some other event in the future without PERF_SAMPLE_TIME for good 2977 * reason, i.e. we may not be interested in its timestamps, just in 2978 * it taking place, picking some piece of information when it 2979 * appears in our event stream (vfs_getname comes to mind). 2980 */ 2981 if (trace->base_time == 0 && !trace->full_time && 2982 (evsel->core.attr.sample_type & PERF_SAMPLE_TIME)) 2983 trace->base_time = sample->time; 2984 } 2985 2986 static int trace__process_sample(struct perf_tool *tool, 2987 union perf_event *event, 2988 struct perf_sample *sample, 2989 struct evsel *evsel, 2990 struct machine *machine __maybe_unused) 2991 { 2992 struct trace *trace = container_of(tool, struct trace, tool); 2993 struct thread *thread; 2994 int err = 0; 2995 2996 tracepoint_handler handler = evsel->handler; 2997 2998 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2999 if (thread && thread__is_filtered(thread)) 3000 goto out; 3001 3002 trace__set_base_time(trace, evsel, sample); 3003 3004 if (handler) { 3005 ++trace->nr_events; 3006 handler(trace, evsel, event, sample); 3007 } 3008 out: 3009 thread__put(thread); 3010 return err; 3011 } 3012 3013 static int trace__record(struct trace *trace, int argc, const char **argv) 3014 { 3015 unsigned int rec_argc, i, j; 3016 const char **rec_argv; 3017 const char * const record_args[] = { 3018 "record", 3019 "-R", 3020 "-m", "1024", 3021 "-c", "1", 3022 }; 3023 pid_t pid = getpid(); 3024 char *filter = asprintf__tp_filter_pids(1, &pid); 3025 const char * const sc_args[] = { "-e", }; 3026 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 3027 const char * const majpf_args[] = { "-e", "major-faults" }; 3028 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 3029 const char * const minpf_args[] = { "-e", "minor-faults" }; 3030 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 3031 int err = -1; 3032 3033 /* +3 is for the event string below and the pid filter */ 3034 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 3 + 3035 majpf_args_nr + minpf_args_nr + argc; 3036 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 3037 3038 if (rec_argv == NULL || filter == NULL) 3039 goto out_free; 3040 3041 j = 0; 3042 for (i = 0; i < ARRAY_SIZE(record_args); i++) 3043 rec_argv[j++] = record_args[i]; 3044 3045 if (trace->trace_syscalls) { 3046 for (i = 0; i < sc_args_nr; i++) 3047 rec_argv[j++] = sc_args[i]; 3048 3049 /* event string may be different for older kernels - e.g., RHEL6 */ 3050 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 3051 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 3052 else if (is_valid_tracepoint("syscalls:sys_enter")) 3053 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 3054 else { 3055 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 3056 goto out_free; 3057 } 3058 } 3059 3060 rec_argv[j++] = "--filter"; 3061 rec_argv[j++] = filter; 3062 3063 if (trace->trace_pgfaults & TRACE_PFMAJ) 3064 for (i = 0; i < majpf_args_nr; i++) 3065 rec_argv[j++] = majpf_args[i]; 3066 3067 if (trace->trace_pgfaults & TRACE_PFMIN) 3068 for (i = 0; i < minpf_args_nr; i++) 3069 rec_argv[j++] = minpf_args[i]; 3070 3071 for (i = 0; i < (unsigned int)argc; i++) 3072 rec_argv[j++] = argv[i]; 3073 3074 err = cmd_record(j, rec_argv); 3075 out_free: 3076 free(filter); 3077 free(rec_argv); 3078 return err; 3079 } 3080 3081 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 3082 3083 static bool evlist__add_vfs_getname(struct evlist *evlist) 3084 { 3085 bool found = false; 3086 struct evsel *evsel, *tmp; 3087 struct parse_events_error err; 3088 int ret; 3089 3090 parse_events_error__init(&err); 3091 ret = parse_events(evlist, "probe:vfs_getname*", &err); 3092 parse_events_error__exit(&err); 3093 if (ret) 3094 return false; 3095 3096 evlist__for_each_entry_safe(evlist, evsel, tmp) { 3097 if (!strstarts(evsel__name(evsel), "probe:vfs_getname")) 3098 continue; 3099 3100 if (evsel__field(evsel, "pathname")) { 3101 evsel->handler = trace__vfs_getname; 3102 found = true; 3103 continue; 3104 } 3105 3106 list_del_init(&evsel->core.node); 3107 evsel->evlist = NULL; 3108 evsel__delete(evsel); 3109 } 3110 3111 return found; 3112 } 3113 3114 static struct evsel *evsel__new_pgfault(u64 config) 3115 { 3116 struct evsel *evsel; 3117 struct perf_event_attr attr = { 3118 .type = PERF_TYPE_SOFTWARE, 3119 .mmap_data = 1, 3120 }; 3121 3122 attr.config = config; 3123 attr.sample_period = 1; 3124 3125 event_attr_init(&attr); 3126 3127 evsel = evsel__new(&attr); 3128 if (evsel) 3129 evsel->handler = trace__pgfault; 3130 3131 return evsel; 3132 } 3133 3134 static void evlist__free_syscall_tp_fields(struct evlist *evlist) 3135 { 3136 struct evsel *evsel; 3137 3138 evlist__for_each_entry(evlist, evsel) { 3139 struct evsel_trace *et = evsel->priv; 3140 3141 if (!et || !evsel->tp_format || strcmp(evsel->tp_format->system, "syscalls")) 3142 continue; 3143 3144 zfree(&et->fmt); 3145 free(et); 3146 } 3147 } 3148 3149 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 3150 { 3151 const u32 type = event->header.type; 3152 struct evsel *evsel; 3153 3154 if (type != PERF_RECORD_SAMPLE) { 3155 trace__process_event(trace, trace->host, event, sample); 3156 return; 3157 } 3158 3159 evsel = evlist__id2evsel(trace->evlist, sample->id); 3160 if (evsel == NULL) { 3161 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 3162 return; 3163 } 3164 3165 if (evswitch__discard(&trace->evswitch, evsel)) 3166 return; 3167 3168 trace__set_base_time(trace, evsel, sample); 3169 3170 if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT && 3171 sample->raw_data == NULL) { 3172 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 3173 evsel__name(evsel), sample->tid, 3174 sample->cpu, sample->raw_size); 3175 } else { 3176 tracepoint_handler handler = evsel->handler; 3177 handler(trace, evsel, event, sample); 3178 } 3179 3180 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 3181 interrupted = true; 3182 } 3183 3184 static int trace__add_syscall_newtp(struct trace *trace) 3185 { 3186 int ret = -1; 3187 struct evlist *evlist = trace->evlist; 3188 struct evsel *sys_enter, *sys_exit; 3189 3190 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 3191 if (sys_enter == NULL) 3192 goto out; 3193 3194 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 3195 goto out_delete_sys_enter; 3196 3197 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 3198 if (sys_exit == NULL) 3199 goto out_delete_sys_enter; 3200 3201 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 3202 goto out_delete_sys_exit; 3203 3204 evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 3205 evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 3206 3207 evlist__add(evlist, sys_enter); 3208 evlist__add(evlist, sys_exit); 3209 3210 if (callchain_param.enabled && !trace->kernel_syscallchains) { 3211 /* 3212 * We're interested only in the user space callchain 3213 * leading to the syscall, allow overriding that for 3214 * debugging reasons using --kernel_syscall_callchains 3215 */ 3216 sys_exit->core.attr.exclude_callchain_kernel = 1; 3217 } 3218 3219 trace->syscalls.events.sys_enter = sys_enter; 3220 trace->syscalls.events.sys_exit = sys_exit; 3221 3222 ret = 0; 3223 out: 3224 return ret; 3225 3226 out_delete_sys_exit: 3227 evsel__delete_priv(sys_exit); 3228 out_delete_sys_enter: 3229 evsel__delete_priv(sys_enter); 3230 goto out; 3231 } 3232 3233 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 3234 { 3235 int err = -1; 3236 struct evsel *sys_exit; 3237 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 3238 trace->ev_qualifier_ids.nr, 3239 trace->ev_qualifier_ids.entries); 3240 3241 if (filter == NULL) 3242 goto out_enomem; 3243 3244 if (!evsel__append_tp_filter(trace->syscalls.events.sys_enter, filter)) { 3245 sys_exit = trace->syscalls.events.sys_exit; 3246 err = evsel__append_tp_filter(sys_exit, filter); 3247 } 3248 3249 free(filter); 3250 out: 3251 return err; 3252 out_enomem: 3253 errno = ENOMEM; 3254 goto out; 3255 } 3256 3257 #ifdef HAVE_LIBBPF_SUPPORT 3258 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace, const char *name) 3259 { 3260 if (trace->bpf_obj == NULL) 3261 return NULL; 3262 3263 return bpf_object__find_map_by_name(trace->bpf_obj, name); 3264 } 3265 3266 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3267 { 3268 trace->filter_pids.map = trace__find_bpf_map_by_name(trace, "pids_filtered"); 3269 } 3270 3271 static void trace__set_bpf_map_syscalls(struct trace *trace) 3272 { 3273 trace->syscalls.prog_array.sys_enter = trace__find_bpf_map_by_name(trace, "syscalls_sys_enter"); 3274 trace->syscalls.prog_array.sys_exit = trace__find_bpf_map_by_name(trace, "syscalls_sys_exit"); 3275 } 3276 3277 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace, const char *name) 3278 { 3279 struct bpf_program *pos, *prog = NULL; 3280 const char *sec_name; 3281 3282 if (trace->bpf_obj == NULL) 3283 return NULL; 3284 3285 bpf_object__for_each_program(pos, trace->bpf_obj) { 3286 sec_name = bpf_program__section_name(pos); 3287 if (sec_name && !strcmp(sec_name, name)) { 3288 prog = pos; 3289 break; 3290 } 3291 } 3292 3293 return prog; 3294 } 3295 3296 static struct bpf_program *trace__find_syscall_bpf_prog(struct trace *trace, struct syscall *sc, 3297 const char *prog_name, const char *type) 3298 { 3299 struct bpf_program *prog; 3300 3301 if (prog_name == NULL) { 3302 char default_prog_name[256]; 3303 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->name); 3304 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3305 if (prog != NULL) 3306 goto out_found; 3307 if (sc->fmt && sc->fmt->alias) { 3308 scnprintf(default_prog_name, sizeof(default_prog_name), "!syscalls:sys_%s_%s", type, sc->fmt->alias); 3309 prog = trace__find_bpf_program_by_title(trace, default_prog_name); 3310 if (prog != NULL) 3311 goto out_found; 3312 } 3313 goto out_unaugmented; 3314 } 3315 3316 prog = trace__find_bpf_program_by_title(trace, prog_name); 3317 3318 if (prog != NULL) { 3319 out_found: 3320 return prog; 3321 } 3322 3323 pr_debug("Couldn't find BPF prog \"%s\" to associate with syscalls:sys_%s_%s, not augmenting it\n", 3324 prog_name, type, sc->name); 3325 out_unaugmented: 3326 return trace->syscalls.unaugmented_prog; 3327 } 3328 3329 static void trace__init_syscall_bpf_progs(struct trace *trace, int id) 3330 { 3331 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3332 3333 if (sc == NULL) 3334 return; 3335 3336 sc->bpf_prog.sys_enter = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3337 sc->bpf_prog.sys_exit = trace__find_syscall_bpf_prog(trace, sc, sc->fmt ? sc->fmt->bpf_prog_name.sys_exit : NULL, "exit"); 3338 } 3339 3340 static int trace__bpf_prog_sys_enter_fd(struct trace *trace, int id) 3341 { 3342 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3343 return sc ? bpf_program__fd(sc->bpf_prog.sys_enter) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3344 } 3345 3346 static int trace__bpf_prog_sys_exit_fd(struct trace *trace, int id) 3347 { 3348 struct syscall *sc = trace__syscall_info(trace, NULL, id); 3349 return sc ? bpf_program__fd(sc->bpf_prog.sys_exit) : bpf_program__fd(trace->syscalls.unaugmented_prog); 3350 } 3351 3352 static struct bpf_program *trace__find_usable_bpf_prog_entry(struct trace *trace, struct syscall *sc) 3353 { 3354 struct tep_format_field *field, *candidate_field; 3355 int id; 3356 3357 /* 3358 * We're only interested in syscalls that have a pointer: 3359 */ 3360 for (field = sc->args; field; field = field->next) { 3361 if (field->flags & TEP_FIELD_IS_POINTER) 3362 goto try_to_find_pair; 3363 } 3364 3365 return NULL; 3366 3367 try_to_find_pair: 3368 for (id = 0; id < trace->sctbl->syscalls.nr_entries; ++id) { 3369 struct syscall *pair = trace__syscall_info(trace, NULL, id); 3370 struct bpf_program *pair_prog; 3371 bool is_candidate = false; 3372 3373 if (pair == NULL || pair == sc || 3374 pair->bpf_prog.sys_enter == trace->syscalls.unaugmented_prog) 3375 continue; 3376 3377 for (field = sc->args, candidate_field = pair->args; 3378 field && candidate_field; field = field->next, candidate_field = candidate_field->next) { 3379 bool is_pointer = field->flags & TEP_FIELD_IS_POINTER, 3380 candidate_is_pointer = candidate_field->flags & TEP_FIELD_IS_POINTER; 3381 3382 if (is_pointer) { 3383 if (!candidate_is_pointer) { 3384 // The candidate just doesn't copies our pointer arg, might copy other pointers we want. 3385 continue; 3386 } 3387 } else { 3388 if (candidate_is_pointer) { 3389 // The candidate might copy a pointer we don't have, skip it. 3390 goto next_candidate; 3391 } 3392 continue; 3393 } 3394 3395 if (strcmp(field->type, candidate_field->type)) 3396 goto next_candidate; 3397 3398 is_candidate = true; 3399 } 3400 3401 if (!is_candidate) 3402 goto next_candidate; 3403 3404 /* 3405 * Check if the tentative pair syscall augmenter has more pointers, if it has, 3406 * then it may be collecting that and we then can't use it, as it would collect 3407 * more than what is common to the two syscalls. 3408 */ 3409 if (candidate_field) { 3410 for (candidate_field = candidate_field->next; candidate_field; candidate_field = candidate_field->next) 3411 if (candidate_field->flags & TEP_FIELD_IS_POINTER) 3412 goto next_candidate; 3413 } 3414 3415 pair_prog = pair->bpf_prog.sys_enter; 3416 /* 3417 * If the pair isn't enabled, then its bpf_prog.sys_enter will not 3418 * have been searched for, so search it here and if it returns the 3419 * unaugmented one, then ignore it, otherwise we'll reuse that BPF 3420 * program for a filtered syscall on a non-filtered one. 3421 * 3422 * For instance, we have "!syscalls:sys_enter_renameat" and that is 3423 * useful for "renameat2". 3424 */ 3425 if (pair_prog == NULL) { 3426 pair_prog = trace__find_syscall_bpf_prog(trace, pair, pair->fmt ? pair->fmt->bpf_prog_name.sys_enter : NULL, "enter"); 3427 if (pair_prog == trace->syscalls.unaugmented_prog) 3428 goto next_candidate; 3429 } 3430 3431 pr_debug("Reusing \"%s\" BPF sys_enter augmenter for \"%s\"\n", pair->name, sc->name); 3432 return pair_prog; 3433 next_candidate: 3434 continue; 3435 } 3436 3437 return NULL; 3438 } 3439 3440 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace) 3441 { 3442 int map_enter_fd = bpf_map__fd(trace->syscalls.prog_array.sys_enter), 3443 map_exit_fd = bpf_map__fd(trace->syscalls.prog_array.sys_exit); 3444 int err = 0, key; 3445 3446 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3447 int prog_fd; 3448 3449 if (!trace__syscall_enabled(trace, key)) 3450 continue; 3451 3452 trace__init_syscall_bpf_progs(trace, key); 3453 3454 // It'll get at least the "!raw_syscalls:unaugmented" 3455 prog_fd = trace__bpf_prog_sys_enter_fd(trace, key); 3456 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3457 if (err) 3458 break; 3459 prog_fd = trace__bpf_prog_sys_exit_fd(trace, key); 3460 err = bpf_map_update_elem(map_exit_fd, &key, &prog_fd, BPF_ANY); 3461 if (err) 3462 break; 3463 } 3464 3465 /* 3466 * Now lets do a second pass looking for enabled syscalls without 3467 * an augmenter that have a signature that is a superset of another 3468 * syscall with an augmenter so that we can auto-reuse it. 3469 * 3470 * I.e. if we have an augmenter for the "open" syscall that has 3471 * this signature: 3472 * 3473 * int open(const char *pathname, int flags, mode_t mode); 3474 * 3475 * I.e. that will collect just the first string argument, then we 3476 * can reuse it for the 'creat' syscall, that has this signature: 3477 * 3478 * int creat(const char *pathname, mode_t mode); 3479 * 3480 * and for: 3481 * 3482 * int stat(const char *pathname, struct stat *statbuf); 3483 * int lstat(const char *pathname, struct stat *statbuf); 3484 * 3485 * Because the 'open' augmenter will collect the first arg as a string, 3486 * and leave alone all the other args, which already helps with 3487 * beautifying 'stat' and 'lstat''s pathname arg. 3488 * 3489 * Then, in time, when 'stat' gets an augmenter that collects both 3490 * first and second arg (this one on the raw_syscalls:sys_exit prog 3491 * array tail call, then that one will be used. 3492 */ 3493 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 3494 struct syscall *sc = trace__syscall_info(trace, NULL, key); 3495 struct bpf_program *pair_prog; 3496 int prog_fd; 3497 3498 if (sc == NULL || sc->bpf_prog.sys_enter == NULL) 3499 continue; 3500 3501 /* 3502 * For now we're just reusing the sys_enter prog, and if it 3503 * already has an augmenter, we don't need to find one. 3504 */ 3505 if (sc->bpf_prog.sys_enter != trace->syscalls.unaugmented_prog) 3506 continue; 3507 3508 /* 3509 * Look at all the other syscalls for one that has a signature 3510 * that is close enough that we can share: 3511 */ 3512 pair_prog = trace__find_usable_bpf_prog_entry(trace, sc); 3513 if (pair_prog == NULL) 3514 continue; 3515 3516 sc->bpf_prog.sys_enter = pair_prog; 3517 3518 /* 3519 * Update the BPF_MAP_TYPE_PROG_SHARED for raw_syscalls:sys_enter 3520 * with the fd for the program we're reusing: 3521 */ 3522 prog_fd = bpf_program__fd(sc->bpf_prog.sys_enter); 3523 err = bpf_map_update_elem(map_enter_fd, &key, &prog_fd, BPF_ANY); 3524 if (err) 3525 break; 3526 } 3527 3528 3529 return err; 3530 } 3531 3532 static void trace__delete_augmented_syscalls(struct trace *trace) 3533 { 3534 struct evsel *evsel, *tmp; 3535 3536 evlist__remove(trace->evlist, trace->syscalls.events.augmented); 3537 evsel__delete(trace->syscalls.events.augmented); 3538 trace->syscalls.events.augmented = NULL; 3539 3540 evlist__for_each_entry_safe(trace->evlist, tmp, evsel) { 3541 if (evsel->bpf_obj == trace->bpf_obj) { 3542 evlist__remove(trace->evlist, evsel); 3543 evsel__delete(evsel); 3544 } 3545 3546 } 3547 3548 bpf_object__close(trace->bpf_obj); 3549 trace->bpf_obj = NULL; 3550 } 3551 #else // HAVE_LIBBPF_SUPPORT 3552 static struct bpf_map *trace__find_bpf_map_by_name(struct trace *trace __maybe_unused, 3553 const char *name __maybe_unused) 3554 { 3555 return NULL; 3556 } 3557 3558 static void trace__set_bpf_map_filtered_pids(struct trace *trace __maybe_unused) 3559 { 3560 } 3561 3562 static void trace__set_bpf_map_syscalls(struct trace *trace __maybe_unused) 3563 { 3564 } 3565 3566 static struct bpf_program *trace__find_bpf_program_by_title(struct trace *trace __maybe_unused, 3567 const char *name __maybe_unused) 3568 { 3569 return NULL; 3570 } 3571 3572 static int trace__init_syscalls_bpf_prog_array_maps(struct trace *trace __maybe_unused) 3573 { 3574 return 0; 3575 } 3576 3577 static void trace__delete_augmented_syscalls(struct trace *trace __maybe_unused) 3578 { 3579 } 3580 #endif // HAVE_LIBBPF_SUPPORT 3581 3582 static bool trace__only_augmented_syscalls_evsels(struct trace *trace) 3583 { 3584 struct evsel *evsel; 3585 3586 evlist__for_each_entry(trace->evlist, evsel) { 3587 if (evsel == trace->syscalls.events.augmented || 3588 evsel->bpf_obj == trace->bpf_obj) 3589 continue; 3590 3591 return false; 3592 } 3593 3594 return true; 3595 } 3596 3597 static int trace__set_ev_qualifier_filter(struct trace *trace) 3598 { 3599 if (trace->syscalls.events.sys_enter) 3600 return trace__set_ev_qualifier_tp_filter(trace); 3601 return 0; 3602 } 3603 3604 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 3605 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 3606 { 3607 int err = 0; 3608 #ifdef HAVE_LIBBPF_SUPPORT 3609 bool value = true; 3610 int map_fd = bpf_map__fd(map); 3611 size_t i; 3612 3613 for (i = 0; i < npids; ++i) { 3614 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 3615 if (err) 3616 break; 3617 } 3618 #endif 3619 return err; 3620 } 3621 3622 static int trace__set_filter_loop_pids(struct trace *trace) 3623 { 3624 unsigned int nr = 1, err; 3625 pid_t pids[32] = { 3626 getpid(), 3627 }; 3628 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 3629 3630 while (thread && nr < ARRAY_SIZE(pids)) { 3631 struct thread *parent = machine__find_thread(trace->host, 3632 thread__ppid(thread), 3633 thread__ppid(thread)); 3634 3635 if (parent == NULL) 3636 break; 3637 3638 if (!strcmp(thread__comm_str(parent), "sshd") || 3639 strstarts(thread__comm_str(parent), "gnome-terminal")) { 3640 pids[nr++] = thread__tid(parent); 3641 break; 3642 } 3643 thread = parent; 3644 } 3645 3646 err = evlist__append_tp_filter_pids(trace->evlist, nr, pids); 3647 if (!err && trace->filter_pids.map) 3648 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 3649 3650 return err; 3651 } 3652 3653 static int trace__set_filter_pids(struct trace *trace) 3654 { 3655 int err = 0; 3656 /* 3657 * Better not use !target__has_task() here because we need to cover the 3658 * case where no threads were specified in the command line, but a 3659 * workload was, and in that case we will fill in the thread_map when 3660 * we fork the workload in evlist__prepare_workload. 3661 */ 3662 if (trace->filter_pids.nr > 0) { 3663 err = evlist__append_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 3664 trace->filter_pids.entries); 3665 if (!err && trace->filter_pids.map) { 3666 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 3667 trace->filter_pids.entries); 3668 } 3669 } else if (perf_thread_map__pid(trace->evlist->core.threads, 0) == -1) { 3670 err = trace__set_filter_loop_pids(trace); 3671 } 3672 3673 return err; 3674 } 3675 3676 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 3677 { 3678 struct evlist *evlist = trace->evlist; 3679 struct perf_sample sample; 3680 int err = evlist__parse_sample(evlist, event, &sample); 3681 3682 if (err) 3683 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 3684 else 3685 trace__handle_event(trace, event, &sample); 3686 3687 return 0; 3688 } 3689 3690 static int __trace__flush_events(struct trace *trace) 3691 { 3692 u64 first = ordered_events__first_time(&trace->oe.data); 3693 u64 flush = trace->oe.last - NSEC_PER_SEC; 3694 3695 /* Is there some thing to flush.. */ 3696 if (first && first < flush) 3697 return ordered_events__flush_time(&trace->oe.data, flush); 3698 3699 return 0; 3700 } 3701 3702 static int trace__flush_events(struct trace *trace) 3703 { 3704 return !trace->sort_events ? 0 : __trace__flush_events(trace); 3705 } 3706 3707 static int trace__deliver_event(struct trace *trace, union perf_event *event) 3708 { 3709 int err; 3710 3711 if (!trace->sort_events) 3712 return __trace__deliver_event(trace, event); 3713 3714 err = evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 3715 if (err && err != -1) 3716 return err; 3717 3718 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0, NULL); 3719 if (err) 3720 return err; 3721 3722 return trace__flush_events(trace); 3723 } 3724 3725 static int ordered_events__deliver_event(struct ordered_events *oe, 3726 struct ordered_event *event) 3727 { 3728 struct trace *trace = container_of(oe, struct trace, oe.data); 3729 3730 return __trace__deliver_event(trace, event->event); 3731 } 3732 3733 static struct syscall_arg_fmt *evsel__find_syscall_arg_fmt_by_name(struct evsel *evsel, char *arg) 3734 { 3735 struct tep_format_field *field; 3736 struct syscall_arg_fmt *fmt = __evsel__syscall_arg_fmt(evsel); 3737 3738 if (evsel->tp_format == NULL || fmt == NULL) 3739 return NULL; 3740 3741 for (field = evsel->tp_format->format.fields; field; field = field->next, ++fmt) 3742 if (strcmp(field->name, arg) == 0) 3743 return fmt; 3744 3745 return NULL; 3746 } 3747 3748 static int trace__expand_filter(struct trace *trace __maybe_unused, struct evsel *evsel) 3749 { 3750 char *tok, *left = evsel->filter, *new_filter = evsel->filter; 3751 3752 while ((tok = strpbrk(left, "=<>!")) != NULL) { 3753 char *right = tok + 1, *right_end; 3754 3755 if (*right == '=') 3756 ++right; 3757 3758 while (isspace(*right)) 3759 ++right; 3760 3761 if (*right == '\0') 3762 break; 3763 3764 while (!isalpha(*left)) 3765 if (++left == tok) { 3766 /* 3767 * Bail out, can't find the name of the argument that is being 3768 * used in the filter, let it try to set this filter, will fail later. 3769 */ 3770 return 0; 3771 } 3772 3773 right_end = right + 1; 3774 while (isalnum(*right_end) || *right_end == '_' || *right_end == '|') 3775 ++right_end; 3776 3777 if (isalpha(*right)) { 3778 struct syscall_arg_fmt *fmt; 3779 int left_size = tok - left, 3780 right_size = right_end - right; 3781 char arg[128]; 3782 3783 while (isspace(left[left_size - 1])) 3784 --left_size; 3785 3786 scnprintf(arg, sizeof(arg), "%.*s", left_size, left); 3787 3788 fmt = evsel__find_syscall_arg_fmt_by_name(evsel, arg); 3789 if (fmt == NULL) { 3790 pr_err("\"%s\" not found in \"%s\", can't set filter \"%s\"\n", 3791 arg, evsel->name, evsel->filter); 3792 return -1; 3793 } 3794 3795 pr_debug2("trying to expand \"%s\" \"%.*s\" \"%.*s\" -> ", 3796 arg, (int)(right - tok), tok, right_size, right); 3797 3798 if (fmt->strtoul) { 3799 u64 val; 3800 struct syscall_arg syscall_arg = { 3801 .parm = fmt->parm, 3802 }; 3803 3804 if (fmt->strtoul(right, right_size, &syscall_arg, &val)) { 3805 char *n, expansion[19]; 3806 int expansion_lenght = scnprintf(expansion, sizeof(expansion), "%#" PRIx64, val); 3807 int expansion_offset = right - new_filter; 3808 3809 pr_debug("%s", expansion); 3810 3811 if (asprintf(&n, "%.*s%s%s", expansion_offset, new_filter, expansion, right_end) < 0) { 3812 pr_debug(" out of memory!\n"); 3813 free(new_filter); 3814 return -1; 3815 } 3816 if (new_filter != evsel->filter) 3817 free(new_filter); 3818 left = n + expansion_offset + expansion_lenght; 3819 new_filter = n; 3820 } else { 3821 pr_err("\"%.*s\" not found for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3822 right_size, right, arg, evsel->name, evsel->filter); 3823 return -1; 3824 } 3825 } else { 3826 pr_err("No resolver (strtoul) for \"%s\" in \"%s\", can't set filter \"%s\"\n", 3827 arg, evsel->name, evsel->filter); 3828 return -1; 3829 } 3830 3831 pr_debug("\n"); 3832 } else { 3833 left = right_end; 3834 } 3835 } 3836 3837 if (new_filter != evsel->filter) { 3838 pr_debug("New filter for %s: %s\n", evsel->name, new_filter); 3839 evsel__set_filter(evsel, new_filter); 3840 free(new_filter); 3841 } 3842 3843 return 0; 3844 } 3845 3846 static int trace__expand_filters(struct trace *trace, struct evsel **err_evsel) 3847 { 3848 struct evlist *evlist = trace->evlist; 3849 struct evsel *evsel; 3850 3851 evlist__for_each_entry(evlist, evsel) { 3852 if (evsel->filter == NULL) 3853 continue; 3854 3855 if (trace__expand_filter(trace, evsel)) { 3856 *err_evsel = evsel; 3857 return -1; 3858 } 3859 } 3860 3861 return 0; 3862 } 3863 3864 static int trace__run(struct trace *trace, int argc, const char **argv) 3865 { 3866 struct evlist *evlist = trace->evlist; 3867 struct evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 3868 int err = -1, i; 3869 unsigned long before; 3870 const bool forks = argc > 0; 3871 bool draining = false; 3872 3873 trace->live = true; 3874 3875 if (!trace->raw_augmented_syscalls) { 3876 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 3877 goto out_error_raw_syscalls; 3878 3879 if (trace->trace_syscalls) 3880 trace->vfs_getname = evlist__add_vfs_getname(evlist); 3881 } 3882 3883 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 3884 pgfault_maj = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 3885 if (pgfault_maj == NULL) 3886 goto out_error_mem; 3887 evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 3888 evlist__add(evlist, pgfault_maj); 3889 } 3890 3891 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 3892 pgfault_min = evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 3893 if (pgfault_min == NULL) 3894 goto out_error_mem; 3895 evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 3896 evlist__add(evlist, pgfault_min); 3897 } 3898 3899 /* Enable ignoring missing threads when -u/-p option is defined. */ 3900 trace->opts.ignore_missing_thread = trace->opts.target.uid != UINT_MAX || trace->opts.target.pid; 3901 3902 if (trace->sched && 3903 evlist__add_newtp(evlist, "sched", "sched_stat_runtime", trace__sched_stat_runtime)) 3904 goto out_error_sched_stat_runtime; 3905 /* 3906 * If a global cgroup was set, apply it to all the events without an 3907 * explicit cgroup. I.e.: 3908 * 3909 * trace -G A -e sched:*switch 3910 * 3911 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 3912 * _and_ sched:sched_switch to the 'A' cgroup, while: 3913 * 3914 * trace -e sched:*switch -G A 3915 * 3916 * will only set the sched:sched_switch event to the 'A' cgroup, all the 3917 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 3918 * a cgroup (on the root cgroup, sys wide, etc). 3919 * 3920 * Multiple cgroups: 3921 * 3922 * trace -G A -e sched:*switch -G B 3923 * 3924 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3925 * to the 'B' cgroup. 3926 * 3927 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3928 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3929 */ 3930 if (trace->cgroup) 3931 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3932 3933 err = evlist__create_maps(evlist, &trace->opts.target); 3934 if (err < 0) { 3935 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3936 goto out_delete_evlist; 3937 } 3938 3939 err = trace__symbols_init(trace, evlist); 3940 if (err < 0) { 3941 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3942 goto out_delete_evlist; 3943 } 3944 3945 evlist__config(evlist, &trace->opts, &callchain_param); 3946 3947 if (forks) { 3948 err = evlist__prepare_workload(evlist, &trace->opts.target, argv, false, NULL); 3949 if (err < 0) { 3950 fprintf(trace->output, "Couldn't run the workload!\n"); 3951 goto out_delete_evlist; 3952 } 3953 workload_pid = evlist->workload.pid; 3954 } 3955 3956 err = evlist__open(evlist); 3957 if (err < 0) 3958 goto out_error_open; 3959 3960 err = bpf__apply_obj_config(); 3961 if (err) { 3962 char errbuf[BUFSIZ]; 3963 3964 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 3965 pr_err("ERROR: Apply config to BPF failed: %s\n", 3966 errbuf); 3967 goto out_error_open; 3968 } 3969 3970 err = trace__set_filter_pids(trace); 3971 if (err < 0) 3972 goto out_error_mem; 3973 3974 if (trace->syscalls.prog_array.sys_enter) 3975 trace__init_syscalls_bpf_prog_array_maps(trace); 3976 3977 if (trace->ev_qualifier_ids.nr > 0) { 3978 err = trace__set_ev_qualifier_filter(trace); 3979 if (err < 0) 3980 goto out_errno; 3981 3982 if (trace->syscalls.events.sys_exit) { 3983 pr_debug("event qualifier tracepoint filter: %s\n", 3984 trace->syscalls.events.sys_exit->filter); 3985 } 3986 } 3987 3988 /* 3989 * If the "close" syscall is not traced, then we will not have the 3990 * opportunity to, in syscall_arg__scnprintf_close_fd() invalidate the 3991 * fd->pathname table and were ending up showing the last value set by 3992 * syscalls opening a pathname and associating it with a descriptor or 3993 * reading it from /proc/pid/fd/ in cases where that doesn't make 3994 * sense. 3995 * 3996 * So just disable this beautifier (SCA_FD, SCA_FDAT) when 'close' is 3997 * not in use. 3998 */ 3999 trace->fd_path_disabled = !trace__syscall_enabled(trace, syscalltbl__id(trace->sctbl, "close")); 4000 4001 err = trace__expand_filters(trace, &evsel); 4002 if (err) 4003 goto out_delete_evlist; 4004 err = evlist__apply_filters(evlist, &evsel); 4005 if (err < 0) 4006 goto out_error_apply_filters; 4007 4008 if (trace->dump.map) 4009 bpf_map__fprintf(trace->dump.map, trace->output); 4010 4011 err = evlist__mmap(evlist, trace->opts.mmap_pages); 4012 if (err < 0) 4013 goto out_error_mmap; 4014 4015 if (!target__none(&trace->opts.target) && !trace->opts.target.initial_delay) 4016 evlist__enable(evlist); 4017 4018 if (forks) 4019 evlist__start_workload(evlist); 4020 4021 if (trace->opts.target.initial_delay) { 4022 usleep(trace->opts.target.initial_delay * 1000); 4023 evlist__enable(evlist); 4024 } 4025 4026 trace->multiple_threads = perf_thread_map__pid(evlist->core.threads, 0) == -1 || 4027 perf_thread_map__nr(evlist->core.threads) > 1 || 4028 evlist__first(evlist)->core.attr.inherit; 4029 4030 /* 4031 * Now that we already used evsel->core.attr to ask the kernel to setup the 4032 * events, lets reuse evsel->core.attr.sample_max_stack as the limit in 4033 * trace__resolve_callchain(), allowing per-event max-stack settings 4034 * to override an explicitly set --max-stack global setting. 4035 */ 4036 evlist__for_each_entry(evlist, evsel) { 4037 if (evsel__has_callchain(evsel) && 4038 evsel->core.attr.sample_max_stack == 0) 4039 evsel->core.attr.sample_max_stack = trace->max_stack; 4040 } 4041 again: 4042 before = trace->nr_events; 4043 4044 for (i = 0; i < evlist->core.nr_mmaps; i++) { 4045 union perf_event *event; 4046 struct mmap *md; 4047 4048 md = &evlist->mmap[i]; 4049 if (perf_mmap__read_init(&md->core) < 0) 4050 continue; 4051 4052 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 4053 ++trace->nr_events; 4054 4055 err = trace__deliver_event(trace, event); 4056 if (err) 4057 goto out_disable; 4058 4059 perf_mmap__consume(&md->core); 4060 4061 if (interrupted) 4062 goto out_disable; 4063 4064 if (done && !draining) { 4065 evlist__disable(evlist); 4066 draining = true; 4067 } 4068 } 4069 perf_mmap__read_done(&md->core); 4070 } 4071 4072 if (trace->nr_events == before) { 4073 int timeout = done ? 100 : -1; 4074 4075 if (!draining && evlist__poll(evlist, timeout) > 0) { 4076 if (evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 4077 draining = true; 4078 4079 goto again; 4080 } else { 4081 if (trace__flush_events(trace)) 4082 goto out_disable; 4083 } 4084 } else { 4085 goto again; 4086 } 4087 4088 out_disable: 4089 thread__zput(trace->current); 4090 4091 evlist__disable(evlist); 4092 4093 if (trace->sort_events) 4094 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 4095 4096 if (!err) { 4097 if (trace->summary) 4098 trace__fprintf_thread_summary(trace, trace->output); 4099 4100 if (trace->show_tool_stats) { 4101 fprintf(trace->output, "Stats:\n " 4102 " vfs_getname : %" PRIu64 "\n" 4103 " proc_getname: %" PRIu64 "\n", 4104 trace->stats.vfs_getname, 4105 trace->stats.proc_getname); 4106 } 4107 } 4108 4109 out_delete_evlist: 4110 trace__symbols__exit(trace); 4111 evlist__free_syscall_tp_fields(evlist); 4112 evlist__delete(evlist); 4113 cgroup__put(trace->cgroup); 4114 trace->evlist = NULL; 4115 trace->live = false; 4116 return err; 4117 { 4118 char errbuf[BUFSIZ]; 4119 4120 out_error_sched_stat_runtime: 4121 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 4122 goto out_error; 4123 4124 out_error_raw_syscalls: 4125 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 4126 goto out_error; 4127 4128 out_error_mmap: 4129 evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 4130 goto out_error; 4131 4132 out_error_open: 4133 evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 4134 4135 out_error: 4136 fprintf(trace->output, "%s\n", errbuf); 4137 goto out_delete_evlist; 4138 4139 out_error_apply_filters: 4140 fprintf(trace->output, 4141 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 4142 evsel->filter, evsel__name(evsel), errno, 4143 str_error_r(errno, errbuf, sizeof(errbuf))); 4144 goto out_delete_evlist; 4145 } 4146 out_error_mem: 4147 fprintf(trace->output, "Not enough memory to run!\n"); 4148 goto out_delete_evlist; 4149 4150 out_errno: 4151 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 4152 goto out_delete_evlist; 4153 } 4154 4155 static int trace__replay(struct trace *trace) 4156 { 4157 const struct evsel_str_handler handlers[] = { 4158 { "probe:vfs_getname", trace__vfs_getname, }, 4159 }; 4160 struct perf_data data = { 4161 .path = input_name, 4162 .mode = PERF_DATA_MODE_READ, 4163 .force = trace->force, 4164 }; 4165 struct perf_session *session; 4166 struct evsel *evsel; 4167 int err = -1; 4168 4169 trace->tool.sample = trace__process_sample; 4170 trace->tool.mmap = perf_event__process_mmap; 4171 trace->tool.mmap2 = perf_event__process_mmap2; 4172 trace->tool.comm = perf_event__process_comm; 4173 trace->tool.exit = perf_event__process_exit; 4174 trace->tool.fork = perf_event__process_fork; 4175 trace->tool.attr = perf_event__process_attr; 4176 trace->tool.tracing_data = perf_event__process_tracing_data; 4177 trace->tool.build_id = perf_event__process_build_id; 4178 trace->tool.namespaces = perf_event__process_namespaces; 4179 4180 trace->tool.ordered_events = true; 4181 trace->tool.ordering_requires_timestamps = true; 4182 4183 /* add tid to output */ 4184 trace->multiple_threads = true; 4185 4186 session = perf_session__new(&data, &trace->tool); 4187 if (IS_ERR(session)) 4188 return PTR_ERR(session); 4189 4190 if (trace->opts.target.pid) 4191 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 4192 4193 if (trace->opts.target.tid) 4194 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 4195 4196 if (symbol__init(&session->header.env) < 0) 4197 goto out; 4198 4199 trace->host = &session->machines.host; 4200 4201 err = perf_session__set_tracepoints_handlers(session, handlers); 4202 if (err) 4203 goto out; 4204 4205 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_enter"); 4206 trace->syscalls.events.sys_enter = evsel; 4207 /* older kernels have syscalls tp versus raw_syscalls */ 4208 if (evsel == NULL) 4209 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_enter"); 4210 4211 if (evsel && 4212 (evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 4213 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 4214 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 4215 goto out; 4216 } 4217 4218 evsel = evlist__find_tracepoint_by_name(session->evlist, "raw_syscalls:sys_exit"); 4219 trace->syscalls.events.sys_exit = evsel; 4220 if (evsel == NULL) 4221 evsel = evlist__find_tracepoint_by_name(session->evlist, "syscalls:sys_exit"); 4222 if (evsel && 4223 (evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 4224 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 4225 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 4226 goto out; 4227 } 4228 4229 evlist__for_each_entry(session->evlist, evsel) { 4230 if (evsel->core.attr.type == PERF_TYPE_SOFTWARE && 4231 (evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 4232 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 4233 evsel->core.attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 4234 evsel->handler = trace__pgfault; 4235 } 4236 4237 setup_pager(); 4238 4239 err = perf_session__process_events(session); 4240 if (err) 4241 pr_err("Failed to process events, error %d", err); 4242 4243 else if (trace->summary) 4244 trace__fprintf_thread_summary(trace, trace->output); 4245 4246 out: 4247 perf_session__delete(session); 4248 4249 return err; 4250 } 4251 4252 static size_t trace__fprintf_threads_header(FILE *fp) 4253 { 4254 size_t printed; 4255 4256 printed = fprintf(fp, "\n Summary of events:\n\n"); 4257 4258 return printed; 4259 } 4260 4261 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 4262 struct syscall_stats *stats; 4263 double msecs; 4264 int syscall; 4265 ) 4266 { 4267 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 4268 struct syscall_stats *stats = source->priv; 4269 4270 entry->syscall = source->i; 4271 entry->stats = stats; 4272 entry->msecs = stats ? (u64)stats->stats.n * (avg_stats(&stats->stats) / NSEC_PER_MSEC) : 0; 4273 } 4274 4275 static size_t thread__dump_stats(struct thread_trace *ttrace, 4276 struct trace *trace, FILE *fp) 4277 { 4278 size_t printed = 0; 4279 struct syscall *sc; 4280 struct rb_node *nd; 4281 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 4282 4283 if (syscall_stats == NULL) 4284 return 0; 4285 4286 printed += fprintf(fp, "\n"); 4287 4288 printed += fprintf(fp, " syscall calls errors total min avg max stddev\n"); 4289 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 4290 printed += fprintf(fp, " --------------- -------- ------ -------- --------- --------- --------- ------\n"); 4291 4292 resort_rb__for_each_entry(nd, syscall_stats) { 4293 struct syscall_stats *stats = syscall_stats_entry->stats; 4294 if (stats) { 4295 double min = (double)(stats->stats.min) / NSEC_PER_MSEC; 4296 double max = (double)(stats->stats.max) / NSEC_PER_MSEC; 4297 double avg = avg_stats(&stats->stats); 4298 double pct; 4299 u64 n = (u64)stats->stats.n; 4300 4301 pct = avg ? 100.0 * stddev_stats(&stats->stats) / avg : 0.0; 4302 avg /= NSEC_PER_MSEC; 4303 4304 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 4305 printed += fprintf(fp, " %-15s", sc->name); 4306 printed += fprintf(fp, " %8" PRIu64 " %6" PRIu64 " %9.3f %9.3f %9.3f", 4307 n, stats->nr_failures, syscall_stats_entry->msecs, min, avg); 4308 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 4309 4310 if (trace->errno_summary && stats->nr_failures) { 4311 const char *arch_name = perf_env__arch(trace->host->env); 4312 int e; 4313 4314 for (e = 0; e < stats->max_errno; ++e) { 4315 if (stats->errnos[e] != 0) 4316 fprintf(fp, "\t\t\t\t%s: %d\n", arch_syscalls__strerrno(arch_name, e + 1), stats->errnos[e]); 4317 } 4318 } 4319 } 4320 } 4321 4322 resort_rb__delete(syscall_stats); 4323 printed += fprintf(fp, "\n\n"); 4324 4325 return printed; 4326 } 4327 4328 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 4329 { 4330 size_t printed = 0; 4331 struct thread_trace *ttrace = thread__priv(thread); 4332 double ratio; 4333 4334 if (ttrace == NULL) 4335 return 0; 4336 4337 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 4338 4339 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread__tid(thread)); 4340 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 4341 printed += fprintf(fp, "%.1f%%", ratio); 4342 if (ttrace->pfmaj) 4343 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 4344 if (ttrace->pfmin) 4345 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 4346 if (trace->sched) 4347 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 4348 else if (fputc('\n', fp) != EOF) 4349 ++printed; 4350 4351 printed += thread__dump_stats(ttrace, trace, fp); 4352 4353 return printed; 4354 } 4355 4356 static unsigned long thread__nr_events(struct thread_trace *ttrace) 4357 { 4358 return ttrace ? ttrace->nr_events : 0; 4359 } 4360 4361 DEFINE_RESORT_RB(threads, 4362 (thread__nr_events(thread__priv(a->thread)) < 4363 thread__nr_events(thread__priv(b->thread))), 4364 struct thread *thread; 4365 ) 4366 { 4367 entry->thread = rb_entry(nd, struct thread_rb_node, rb_node)->thread; 4368 } 4369 4370 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 4371 { 4372 size_t printed = trace__fprintf_threads_header(fp); 4373 struct rb_node *nd; 4374 int i; 4375 4376 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 4377 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 4378 4379 if (threads == NULL) { 4380 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 4381 return 0; 4382 } 4383 4384 resort_rb__for_each_entry(nd, threads) 4385 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 4386 4387 resort_rb__delete(threads); 4388 } 4389 return printed; 4390 } 4391 4392 static int trace__set_duration(const struct option *opt, const char *str, 4393 int unset __maybe_unused) 4394 { 4395 struct trace *trace = opt->value; 4396 4397 trace->duration_filter = atof(str); 4398 return 0; 4399 } 4400 4401 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 4402 int unset __maybe_unused) 4403 { 4404 int ret = -1; 4405 size_t i; 4406 struct trace *trace = opt->value; 4407 /* 4408 * FIXME: introduce a intarray class, plain parse csv and create a 4409 * { int nr, int entries[] } struct... 4410 */ 4411 struct intlist *list = intlist__new(str); 4412 4413 if (list == NULL) 4414 return -1; 4415 4416 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 4417 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 4418 4419 if (trace->filter_pids.entries == NULL) 4420 goto out; 4421 4422 trace->filter_pids.entries[0] = getpid(); 4423 4424 for (i = 1; i < trace->filter_pids.nr; ++i) 4425 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 4426 4427 intlist__delete(list); 4428 ret = 0; 4429 out: 4430 return ret; 4431 } 4432 4433 static int trace__open_output(struct trace *trace, const char *filename) 4434 { 4435 struct stat st; 4436 4437 if (!stat(filename, &st) && st.st_size) { 4438 char oldname[PATH_MAX]; 4439 4440 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 4441 unlink(oldname); 4442 rename(filename, oldname); 4443 } 4444 4445 trace->output = fopen(filename, "w"); 4446 4447 return trace->output == NULL ? -errno : 0; 4448 } 4449 4450 static int parse_pagefaults(const struct option *opt, const char *str, 4451 int unset __maybe_unused) 4452 { 4453 int *trace_pgfaults = opt->value; 4454 4455 if (strcmp(str, "all") == 0) 4456 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 4457 else if (strcmp(str, "maj") == 0) 4458 *trace_pgfaults |= TRACE_PFMAJ; 4459 else if (strcmp(str, "min") == 0) 4460 *trace_pgfaults |= TRACE_PFMIN; 4461 else 4462 return -1; 4463 4464 return 0; 4465 } 4466 4467 static void evlist__set_default_evsel_handler(struct evlist *evlist, void *handler) 4468 { 4469 struct evsel *evsel; 4470 4471 evlist__for_each_entry(evlist, evsel) { 4472 if (evsel->handler == NULL) 4473 evsel->handler = handler; 4474 } 4475 } 4476 4477 static void evsel__set_syscall_arg_fmt(struct evsel *evsel, const char *name) 4478 { 4479 struct syscall_arg_fmt *fmt = evsel__syscall_arg_fmt(evsel); 4480 4481 if (fmt) { 4482 const struct syscall_fmt *scfmt = syscall_fmt__find(name); 4483 4484 if (scfmt) { 4485 int skip = 0; 4486 4487 if (strcmp(evsel->tp_format->format.fields->name, "__syscall_nr") == 0 || 4488 strcmp(evsel->tp_format->format.fields->name, "nr") == 0) 4489 ++skip; 4490 4491 memcpy(fmt + skip, scfmt->arg, (evsel->tp_format->format.nr_fields - skip) * sizeof(*fmt)); 4492 } 4493 } 4494 } 4495 4496 static int evlist__set_syscall_tp_fields(struct evlist *evlist) 4497 { 4498 struct evsel *evsel; 4499 4500 evlist__for_each_entry(evlist, evsel) { 4501 if (evsel->priv || !evsel->tp_format) 4502 continue; 4503 4504 if (strcmp(evsel->tp_format->system, "syscalls")) { 4505 evsel__init_tp_arg_scnprintf(evsel); 4506 continue; 4507 } 4508 4509 if (evsel__init_syscall_tp(evsel)) 4510 return -1; 4511 4512 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 4513 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4514 4515 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 4516 return -1; 4517 4518 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_enter_") - 1); 4519 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 4520 struct syscall_tp *sc = __evsel__syscall_tp(evsel); 4521 4522 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 4523 return -1; 4524 4525 evsel__set_syscall_arg_fmt(evsel, evsel->tp_format->name + sizeof("sys_exit_") - 1); 4526 } 4527 } 4528 4529 return 0; 4530 } 4531 4532 /* 4533 * XXX: Hackish, just splitting the combined -e+--event (syscalls 4534 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 4535 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 4536 * 4537 * It'd be better to introduce a parse_options() variant that would return a 4538 * list with the terms it didn't match to an event... 4539 */ 4540 static int trace__parse_events_option(const struct option *opt, const char *str, 4541 int unset __maybe_unused) 4542 { 4543 struct trace *trace = (struct trace *)opt->value; 4544 const char *s = str; 4545 char *sep = NULL, *lists[2] = { NULL, NULL, }; 4546 int len = strlen(str) + 1, err = -1, list, idx; 4547 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 4548 char group_name[PATH_MAX]; 4549 const struct syscall_fmt *fmt; 4550 4551 if (strace_groups_dir == NULL) 4552 return -1; 4553 4554 if (*s == '!') { 4555 ++s; 4556 trace->not_ev_qualifier = true; 4557 } 4558 4559 while (1) { 4560 if ((sep = strchr(s, ',')) != NULL) 4561 *sep = '\0'; 4562 4563 list = 0; 4564 if (syscalltbl__id(trace->sctbl, s) >= 0 || 4565 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 4566 list = 1; 4567 goto do_concat; 4568 } 4569 4570 fmt = syscall_fmt__find_by_alias(s); 4571 if (fmt != NULL) { 4572 list = 1; 4573 s = fmt->name; 4574 } else { 4575 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 4576 if (access(group_name, R_OK) == 0) 4577 list = 1; 4578 } 4579 do_concat: 4580 if (lists[list]) { 4581 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 4582 } else { 4583 lists[list] = malloc(len); 4584 if (lists[list] == NULL) 4585 goto out; 4586 strcpy(lists[list], s); 4587 } 4588 4589 if (!sep) 4590 break; 4591 4592 *sep = ','; 4593 s = sep + 1; 4594 } 4595 4596 if (lists[1] != NULL) { 4597 struct strlist_config slist_config = { 4598 .dirname = strace_groups_dir, 4599 }; 4600 4601 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 4602 if (trace->ev_qualifier == NULL) { 4603 fputs("Not enough memory to parse event qualifier", trace->output); 4604 goto out; 4605 } 4606 4607 if (trace__validate_ev_qualifier(trace)) 4608 goto out; 4609 trace->trace_syscalls = true; 4610 } 4611 4612 err = 0; 4613 4614 if (lists[0]) { 4615 struct parse_events_option_args parse_events_option_args = { 4616 .evlistp = &trace->evlist, 4617 }; 4618 struct option o = { 4619 .value = &parse_events_option_args, 4620 }; 4621 err = parse_events_option(&o, lists[0], 0); 4622 } 4623 out: 4624 free(strace_groups_dir); 4625 free(lists[0]); 4626 free(lists[1]); 4627 if (sep) 4628 *sep = ','; 4629 4630 return err; 4631 } 4632 4633 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 4634 { 4635 struct trace *trace = opt->value; 4636 4637 if (!list_empty(&trace->evlist->core.entries)) { 4638 struct option o = { 4639 .value = &trace->evlist, 4640 }; 4641 return parse_cgroups(&o, str, unset); 4642 } 4643 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 4644 4645 return 0; 4646 } 4647 4648 static int trace__config(const char *var, const char *value, void *arg) 4649 { 4650 struct trace *trace = arg; 4651 int err = 0; 4652 4653 if (!strcmp(var, "trace.add_events")) { 4654 trace->perfconfig_events = strdup(value); 4655 if (trace->perfconfig_events == NULL) { 4656 pr_err("Not enough memory for %s\n", "trace.add_events"); 4657 return -1; 4658 } 4659 } else if (!strcmp(var, "trace.show_timestamp")) { 4660 trace->show_tstamp = perf_config_bool(var, value); 4661 } else if (!strcmp(var, "trace.show_duration")) { 4662 trace->show_duration = perf_config_bool(var, value); 4663 } else if (!strcmp(var, "trace.show_arg_names")) { 4664 trace->show_arg_names = perf_config_bool(var, value); 4665 if (!trace->show_arg_names) 4666 trace->show_zeros = true; 4667 } else if (!strcmp(var, "trace.show_zeros")) { 4668 bool new_show_zeros = perf_config_bool(var, value); 4669 if (!trace->show_arg_names && !new_show_zeros) { 4670 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 4671 goto out; 4672 } 4673 trace->show_zeros = new_show_zeros; 4674 } else if (!strcmp(var, "trace.show_prefix")) { 4675 trace->show_string_prefix = perf_config_bool(var, value); 4676 } else if (!strcmp(var, "trace.no_inherit")) { 4677 trace->opts.no_inherit = perf_config_bool(var, value); 4678 } else if (!strcmp(var, "trace.args_alignment")) { 4679 int args_alignment = 0; 4680 if (perf_config_int(&args_alignment, var, value) == 0) 4681 trace->args_alignment = args_alignment; 4682 } else if (!strcmp(var, "trace.tracepoint_beautifiers")) { 4683 if (strcasecmp(value, "libtraceevent") == 0) 4684 trace->libtraceevent_print = true; 4685 else if (strcasecmp(value, "libbeauty") == 0) 4686 trace->libtraceevent_print = false; 4687 } 4688 out: 4689 return err; 4690 } 4691 4692 static void trace__exit(struct trace *trace) 4693 { 4694 int i; 4695 4696 strlist__delete(trace->ev_qualifier); 4697 zfree(&trace->ev_qualifier_ids.entries); 4698 if (trace->syscalls.table) { 4699 for (i = 0; i <= trace->sctbl->syscalls.max_id; i++) 4700 syscall__exit(&trace->syscalls.table[i]); 4701 zfree(&trace->syscalls.table); 4702 } 4703 syscalltbl__delete(trace->sctbl); 4704 zfree(&trace->perfconfig_events); 4705 } 4706 4707 int cmd_trace(int argc, const char **argv) 4708 { 4709 const char *trace_usage[] = { 4710 "perf trace [<options>] [<command>]", 4711 "perf trace [<options>] -- <command> [<options>]", 4712 "perf trace record [<options>] [<command>]", 4713 "perf trace record [<options>] -- <command> [<options>]", 4714 NULL 4715 }; 4716 struct trace trace = { 4717 .opts = { 4718 .target = { 4719 .uid = UINT_MAX, 4720 .uses_mmap = true, 4721 }, 4722 .user_freq = UINT_MAX, 4723 .user_interval = ULLONG_MAX, 4724 .no_buffering = true, 4725 .mmap_pages = UINT_MAX, 4726 }, 4727 .output = stderr, 4728 .show_comm = true, 4729 .show_tstamp = true, 4730 .show_duration = true, 4731 .show_arg_names = true, 4732 .args_alignment = 70, 4733 .trace_syscalls = false, 4734 .kernel_syscallchains = false, 4735 .max_stack = UINT_MAX, 4736 .max_events = ULONG_MAX, 4737 }; 4738 const char *map_dump_str = NULL; 4739 const char *output_name = NULL; 4740 const struct option trace_options[] = { 4741 OPT_CALLBACK('e', "event", &trace, "event", 4742 "event/syscall selector. use 'perf list' to list available events", 4743 trace__parse_events_option), 4744 OPT_CALLBACK(0, "filter", &trace.evlist, "filter", 4745 "event filter", parse_filter), 4746 OPT_BOOLEAN(0, "comm", &trace.show_comm, 4747 "show the thread COMM next to its id"), 4748 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 4749 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 4750 trace__parse_events_option), 4751 OPT_STRING('o', "output", &output_name, "file", "output file name"), 4752 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 4753 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 4754 "trace events on existing process id"), 4755 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 4756 "trace events on existing thread id"), 4757 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 4758 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 4759 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 4760 "system-wide collection from all CPUs"), 4761 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 4762 "list of cpus to monitor"), 4763 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 4764 "child tasks do not inherit counters"), 4765 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 4766 "number of mmap data pages", evlist__parse_mmap_pages), 4767 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 4768 "user to profile"), 4769 OPT_CALLBACK(0, "duration", &trace, "float", 4770 "show only events with duration > N.M ms", 4771 trace__set_duration), 4772 #ifdef HAVE_LIBBPF_SUPPORT 4773 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 4774 #endif 4775 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 4776 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 4777 OPT_BOOLEAN('T', "time", &trace.full_time, 4778 "Show full timestamp, not time relative to first start"), 4779 OPT_BOOLEAN(0, "failure", &trace.failure_only, 4780 "Show only syscalls that failed"), 4781 OPT_BOOLEAN('s', "summary", &trace.summary_only, 4782 "Show only syscall summary with statistics"), 4783 OPT_BOOLEAN('S', "with-summary", &trace.summary, 4784 "Show all syscalls and summary with statistics"), 4785 OPT_BOOLEAN(0, "errno-summary", &trace.errno_summary, 4786 "Show errno stats per syscall, use with -s or -S"), 4787 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 4788 "Trace pagefaults", parse_pagefaults, "maj"), 4789 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 4790 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 4791 OPT_CALLBACK(0, "call-graph", &trace.opts, 4792 "record_mode[,record_size]", record_callchain_help, 4793 &record_parse_callchain_opt), 4794 OPT_BOOLEAN(0, "libtraceevent_print", &trace.libtraceevent_print, 4795 "Use libtraceevent to print the tracepoint arguments."), 4796 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 4797 "Show the kernel callchains on the syscall exit path"), 4798 OPT_ULONG(0, "max-events", &trace.max_events, 4799 "Set the maximum number of events to print, exit after that is reached. "), 4800 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 4801 "Set the minimum stack depth when parsing the callchain, " 4802 "anything below the specified depth will be ignored."), 4803 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 4804 "Set the maximum stack depth when parsing the callchain, " 4805 "anything beyond the specified depth will be ignored. " 4806 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 4807 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 4808 "Sort batch of events before processing, use if getting out of order events"), 4809 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 4810 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 4811 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 4812 "per thread proc mmap processing timeout in ms"), 4813 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 4814 trace__parse_cgroups), 4815 OPT_INTEGER('D', "delay", &trace.opts.target.initial_delay, 4816 "ms to wait before starting measurement after program " 4817 "start"), 4818 OPTS_EVSWITCH(&trace.evswitch), 4819 OPT_END() 4820 }; 4821 bool __maybe_unused max_stack_user_set = true; 4822 bool mmap_pages_user_set = true; 4823 struct evsel *evsel; 4824 const char * const trace_subcommands[] = { "record", NULL }; 4825 int err = -1; 4826 char bf[BUFSIZ]; 4827 struct sigaction sigchld_act; 4828 4829 signal(SIGSEGV, sighandler_dump_stack); 4830 signal(SIGFPE, sighandler_dump_stack); 4831 signal(SIGINT, sighandler_interrupt); 4832 4833 memset(&sigchld_act, 0, sizeof(sigchld_act)); 4834 sigchld_act.sa_flags = SA_SIGINFO; 4835 sigchld_act.sa_sigaction = sighandler_chld; 4836 sigaction(SIGCHLD, &sigchld_act, NULL); 4837 4838 trace.evlist = evlist__new(); 4839 trace.sctbl = syscalltbl__new(); 4840 4841 if (trace.evlist == NULL || trace.sctbl == NULL) { 4842 pr_err("Not enough memory to run!\n"); 4843 err = -ENOMEM; 4844 goto out; 4845 } 4846 4847 /* 4848 * Parsing .perfconfig may entail creating a BPF event, that may need 4849 * to create BPF maps, so bump RLIM_MEMLOCK as the default 64K setting 4850 * is too small. This affects just this process, not touching the 4851 * global setting. If it fails we'll get something in 'perf trace -v' 4852 * to help diagnose the problem. 4853 */ 4854 rlimit__bump_memlock(); 4855 4856 err = perf_config(trace__config, &trace); 4857 if (err) 4858 goto out; 4859 4860 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 4861 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 4862 4863 /* 4864 * Here we already passed thru trace__parse_events_option() and it has 4865 * already figured out if -e syscall_name, if not but if --event 4866 * foo:bar was used, the user is interested _just_ in those, say, 4867 * tracepoint events, not in the strace-like syscall-name-based mode. 4868 * 4869 * This is important because we need to check if strace-like mode is 4870 * needed to decided if we should filter out the eBPF 4871 * __augmented_syscalls__ code, if it is in the mix, say, via 4872 * .perfconfig trace.add_events, and filter those out. 4873 */ 4874 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4875 trace.evlist->core.nr_entries == 0 /* Was --events used? */) { 4876 trace.trace_syscalls = true; 4877 } 4878 /* 4879 * Now that we have --verbose figured out, lets see if we need to parse 4880 * events from .perfconfig, so that if those events fail parsing, say some 4881 * BPF program fails, then we'll be able to use --verbose to see what went 4882 * wrong in more detail. 4883 */ 4884 if (trace.perfconfig_events != NULL) { 4885 struct parse_events_error parse_err; 4886 4887 parse_events_error__init(&parse_err); 4888 err = parse_events(trace.evlist, trace.perfconfig_events, &parse_err); 4889 if (err) 4890 parse_events_error__print(&parse_err, trace.perfconfig_events); 4891 parse_events_error__exit(&parse_err); 4892 if (err) 4893 goto out; 4894 } 4895 4896 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 4897 usage_with_options_msg(trace_usage, trace_options, 4898 "cgroup monitoring only available in system-wide mode"); 4899 } 4900 4901 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 4902 if (IS_ERR(evsel)) { 4903 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 4904 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 4905 goto out; 4906 } 4907 4908 if (evsel) { 4909 trace.syscalls.events.augmented = evsel; 4910 4911 evsel = evlist__find_tracepoint_by_name(trace.evlist, "raw_syscalls:sys_enter"); 4912 if (evsel == NULL) { 4913 pr_err("ERROR: raw_syscalls:sys_enter not found in the augmented BPF object\n"); 4914 goto out; 4915 } 4916 4917 if (evsel->bpf_obj == NULL) { 4918 pr_err("ERROR: raw_syscalls:sys_enter not associated to a BPF object\n"); 4919 goto out; 4920 } 4921 4922 trace.bpf_obj = evsel->bpf_obj; 4923 4924 /* 4925 * If we have _just_ the augmenter event but don't have a 4926 * explicit --syscalls, then assume we want all strace-like 4927 * syscalls: 4928 */ 4929 if (!trace.trace_syscalls && trace__only_augmented_syscalls_evsels(&trace)) 4930 trace.trace_syscalls = true; 4931 /* 4932 * So, if we have a syscall augmenter, but trace_syscalls, aka 4933 * strace-like syscall tracing is not set, then we need to trow 4934 * away the augmenter, i.e. all the events that were created 4935 * from that BPF object file. 4936 * 4937 * This is more to fix the current .perfconfig trace.add_events 4938 * style of setting up the strace-like eBPF based syscall point 4939 * payload augmenter. 4940 * 4941 * All this complexity will be avoided by adding an alternative 4942 * to trace.add_events in the form of 4943 * trace.bpf_augmented_syscalls, that will be only parsed if we 4944 * need it. 4945 * 4946 * .perfconfig trace.add_events is still useful if we want, for 4947 * instance, have msr_write.msr in some .perfconfig profile based 4948 * 'perf trace --config determinism.profile' mode, where for some 4949 * particular goal/workload type we want a set of events and 4950 * output mode (with timings, etc) instead of having to add 4951 * all via the command line. 4952 * 4953 * Also --config to specify an alternate .perfconfig file needs 4954 * to be implemented. 4955 */ 4956 if (!trace.trace_syscalls) { 4957 trace__delete_augmented_syscalls(&trace); 4958 } else { 4959 trace__set_bpf_map_filtered_pids(&trace); 4960 trace__set_bpf_map_syscalls(&trace); 4961 trace.syscalls.unaugmented_prog = trace__find_bpf_program_by_title(&trace, "!raw_syscalls:unaugmented"); 4962 } 4963 } 4964 4965 err = bpf__setup_stdout(trace.evlist); 4966 if (err) { 4967 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 4968 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 4969 goto out; 4970 } 4971 4972 err = -1; 4973 4974 if (map_dump_str) { 4975 trace.dump.map = trace__find_bpf_map_by_name(&trace, map_dump_str); 4976 if (trace.dump.map == NULL) { 4977 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 4978 goto out; 4979 } 4980 } 4981 4982 if (trace.trace_pgfaults) { 4983 trace.opts.sample_address = true; 4984 trace.opts.sample_time = true; 4985 } 4986 4987 if (trace.opts.mmap_pages == UINT_MAX) 4988 mmap_pages_user_set = false; 4989 4990 if (trace.max_stack == UINT_MAX) { 4991 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 4992 max_stack_user_set = false; 4993 } 4994 4995 #ifdef HAVE_DWARF_UNWIND_SUPPORT 4996 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 4997 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 4998 } 4999 #endif 5000 5001 if (callchain_param.enabled) { 5002 if (!mmap_pages_user_set && geteuid() == 0) 5003 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 5004 5005 symbol_conf.use_callchain = true; 5006 } 5007 5008 if (trace.evlist->core.nr_entries > 0) { 5009 evlist__set_default_evsel_handler(trace.evlist, trace__event_handler); 5010 if (evlist__set_syscall_tp_fields(trace.evlist)) { 5011 perror("failed to set syscalls:* tracepoint fields"); 5012 goto out; 5013 } 5014 } 5015 5016 if (trace.sort_events) { 5017 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 5018 ordered_events__set_copy_on_queue(&trace.oe.data, true); 5019 } 5020 5021 /* 5022 * If we are augmenting syscalls, then combine what we put in the 5023 * __augmented_syscalls__ BPF map with what is in the 5024 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 5025 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 5026 * 5027 * We'll switch to look at two BPF maps, one for sys_enter and the 5028 * other for sys_exit when we start augmenting the sys_exit paths with 5029 * buffers that are being copied from kernel to userspace, think 'read' 5030 * syscall. 5031 */ 5032 if (trace.syscalls.events.augmented) { 5033 evlist__for_each_entry(trace.evlist, evsel) { 5034 bool raw_syscalls_sys_exit = strcmp(evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 5035 5036 if (raw_syscalls_sys_exit) { 5037 trace.raw_augmented_syscalls = true; 5038 goto init_augmented_syscall_tp; 5039 } 5040 5041 if (trace.syscalls.events.augmented->priv == NULL && 5042 strstr(evsel__name(evsel), "syscalls:sys_enter")) { 5043 struct evsel *augmented = trace.syscalls.events.augmented; 5044 if (evsel__init_augmented_syscall_tp(augmented, evsel) || 5045 evsel__init_augmented_syscall_tp_args(augmented)) 5046 goto out; 5047 /* 5048 * Augmented is __augmented_syscalls__ BPF_OUTPUT event 5049 * Above we made sure we can get from the payload the tp fields 5050 * that we get from syscalls:sys_enter tracefs format file. 5051 */ 5052 augmented->handler = trace__sys_enter; 5053 /* 5054 * Now we do the same for the *syscalls:sys_enter event so that 5055 * if we handle it directly, i.e. if the BPF prog returns 0 so 5056 * as not to filter it, then we'll handle it just like we would 5057 * for the BPF_OUTPUT one: 5058 */ 5059 if (evsel__init_augmented_syscall_tp(evsel, evsel) || 5060 evsel__init_augmented_syscall_tp_args(evsel)) 5061 goto out; 5062 evsel->handler = trace__sys_enter; 5063 } 5064 5065 if (strstarts(evsel__name(evsel), "syscalls:sys_exit_")) { 5066 struct syscall_tp *sc; 5067 init_augmented_syscall_tp: 5068 if (evsel__init_augmented_syscall_tp(evsel, evsel)) 5069 goto out; 5070 sc = __evsel__syscall_tp(evsel); 5071 /* 5072 * For now with BPF raw_augmented we hook into 5073 * raw_syscalls:sys_enter and there we get all 5074 * 6 syscall args plus the tracepoint common 5075 * fields and the syscall_nr (another long). 5076 * So we check if that is the case and if so 5077 * don't look after the sc->args_size but 5078 * always after the full raw_syscalls:sys_enter 5079 * payload, which is fixed. 5080 * 5081 * We'll revisit this later to pass 5082 * s->args_size to the BPF augmenter (now 5083 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 5084 * so that it copies only what we need for each 5085 * syscall, like what happens when we use 5086 * syscalls:sys_enter_NAME, so that we reduce 5087 * the kernel/userspace traffic to just what is 5088 * needed for each syscall. 5089 */ 5090 if (trace.raw_augmented_syscalls) 5091 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 5092 evsel__init_augmented_syscall_tp_ret(evsel); 5093 evsel->handler = trace__sys_exit; 5094 } 5095 } 5096 } 5097 5098 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 5099 return trace__record(&trace, argc-1, &argv[1]); 5100 5101 /* Using just --errno-summary will trigger --summary */ 5102 if (trace.errno_summary && !trace.summary && !trace.summary_only) 5103 trace.summary_only = true; 5104 5105 /* summary_only implies summary option, but don't overwrite summary if set */ 5106 if (trace.summary_only) 5107 trace.summary = trace.summary_only; 5108 5109 if (output_name != NULL) { 5110 err = trace__open_output(&trace, output_name); 5111 if (err < 0) { 5112 perror("failed to create output file"); 5113 goto out; 5114 } 5115 } 5116 5117 err = evswitch__init(&trace.evswitch, trace.evlist, stderr); 5118 if (err) 5119 goto out_close; 5120 5121 err = target__validate(&trace.opts.target); 5122 if (err) { 5123 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5124 fprintf(trace.output, "%s", bf); 5125 goto out_close; 5126 } 5127 5128 err = target__parse_uid(&trace.opts.target); 5129 if (err) { 5130 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 5131 fprintf(trace.output, "%s", bf); 5132 goto out_close; 5133 } 5134 5135 if (!argc && target__none(&trace.opts.target)) 5136 trace.opts.target.system_wide = true; 5137 5138 if (input_name) 5139 err = trace__replay(&trace); 5140 else 5141 err = trace__run(&trace, argc, argv); 5142 5143 out_close: 5144 if (output_name != NULL) 5145 fclose(trace.output); 5146 out: 5147 trace__exit(&trace); 5148 return err; 5149 } 5150