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