1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * builtin-trace.c 4 * 5 * Builtin 'trace' command: 6 * 7 * Display a continuously updated trace of any workload, CPU, specific PID, 8 * system wide, etc. Default format is loosely strace like, but any other 9 * event may be specified using --event. 10 * 11 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 12 * 13 * Initially based on the 'trace' prototype by Thomas Gleixner: 14 * 15 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 16 */ 17 18 #include <traceevent/event-parse.h> 19 #include <api/fs/tracing_path.h> 20 #include <bpf/bpf.h> 21 #include "util/bpf_map.h" 22 #include "builtin.h" 23 #include "util/cgroup.h" 24 #include "util/color.h" 25 #include "util/config.h" 26 #include "util/debug.h" 27 #include "util/env.h" 28 #include "util/event.h" 29 #include "util/evlist.h" 30 #include <subcmd/exec-cmd.h> 31 #include "util/machine.h" 32 #include "util/map.h" 33 #include "util/symbol.h" 34 #include "util/path.h" 35 #include "util/session.h" 36 #include "util/thread.h" 37 #include <subcmd/parse-options.h> 38 #include "util/strlist.h" 39 #include "util/intlist.h" 40 #include "util/thread_map.h" 41 #include "util/stat.h" 42 #include "trace/beauty/beauty.h" 43 #include "trace-event.h" 44 #include "util/parse-events.h" 45 #include "util/bpf-loader.h" 46 #include "callchain.h" 47 #include "print_binary.h" 48 #include "string2.h" 49 #include "syscalltbl.h" 50 #include "rb_resort.h" 51 52 #include <errno.h> 53 #include <inttypes.h> 54 #include <poll.h> 55 #include <signal.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <linux/err.h> 59 #include <linux/filter.h> 60 #include <linux/kernel.h> 61 #include <linux/random.h> 62 #include <linux/stringify.h> 63 #include <linux/time64.h> 64 #include <fcntl.h> 65 #include <sys/sysmacros.h> 66 67 #include "sane_ctype.h" 68 69 #ifndef O_CLOEXEC 70 # define O_CLOEXEC 02000000 71 #endif 72 73 #ifndef F_LINUX_SPECIFIC_BASE 74 # define F_LINUX_SPECIFIC_BASE 1024 75 #endif 76 77 struct trace { 78 struct perf_tool tool; 79 struct syscalltbl *sctbl; 80 struct { 81 int max; 82 struct syscall *table; 83 struct bpf_map *map; 84 struct { 85 struct perf_evsel *sys_enter, 86 *sys_exit, 87 *augmented; 88 } events; 89 } syscalls; 90 struct { 91 struct bpf_map *map; 92 } dump; 93 struct record_opts opts; 94 struct perf_evlist *evlist; 95 struct machine *host; 96 struct thread *current; 97 struct cgroup *cgroup; 98 u64 base_time; 99 FILE *output; 100 unsigned long nr_events; 101 unsigned long nr_events_printed; 102 unsigned long max_events; 103 struct strlist *ev_qualifier; 104 struct { 105 size_t nr; 106 int *entries; 107 } ev_qualifier_ids; 108 struct { 109 size_t nr; 110 pid_t *entries; 111 struct bpf_map *map; 112 } filter_pids; 113 double duration_filter; 114 double runtime_ms; 115 struct { 116 u64 vfs_getname, 117 proc_getname; 118 } stats; 119 unsigned int max_stack; 120 unsigned int min_stack; 121 int raw_augmented_syscalls_args_size; 122 bool raw_augmented_syscalls; 123 bool sort_events; 124 bool not_ev_qualifier; 125 bool live; 126 bool full_time; 127 bool sched; 128 bool multiple_threads; 129 bool summary; 130 bool summary_only; 131 bool failure_only; 132 bool show_comm; 133 bool print_sample; 134 bool show_tool_stats; 135 bool trace_syscalls; 136 bool kernel_syscallchains; 137 s16 args_alignment; 138 bool show_tstamp; 139 bool show_duration; 140 bool show_zeros; 141 bool show_arg_names; 142 bool show_string_prefix; 143 bool force; 144 bool vfs_getname; 145 int trace_pgfaults; 146 struct { 147 struct ordered_events data; 148 u64 last; 149 } oe; 150 }; 151 152 struct tp_field { 153 int offset; 154 union { 155 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 156 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 157 }; 158 }; 159 160 #define TP_UINT_FIELD(bits) \ 161 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 162 { \ 163 u##bits value; \ 164 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 165 return value; \ 166 } 167 168 TP_UINT_FIELD(8); 169 TP_UINT_FIELD(16); 170 TP_UINT_FIELD(32); 171 TP_UINT_FIELD(64); 172 173 #define TP_UINT_FIELD__SWAPPED(bits) \ 174 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 175 { \ 176 u##bits value; \ 177 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 178 return bswap_##bits(value);\ 179 } 180 181 TP_UINT_FIELD__SWAPPED(16); 182 TP_UINT_FIELD__SWAPPED(32); 183 TP_UINT_FIELD__SWAPPED(64); 184 185 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 186 { 187 field->offset = offset; 188 189 switch (size) { 190 case 1: 191 field->integer = tp_field__u8; 192 break; 193 case 2: 194 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 195 break; 196 case 4: 197 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 198 break; 199 case 8: 200 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 201 break; 202 default: 203 return -1; 204 } 205 206 return 0; 207 } 208 209 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 210 { 211 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 212 } 213 214 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 215 { 216 return sample->raw_data + field->offset; 217 } 218 219 static int __tp_field__init_ptr(struct tp_field *field, int offset) 220 { 221 field->offset = offset; 222 field->pointer = tp_field__ptr; 223 return 0; 224 } 225 226 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 227 { 228 return __tp_field__init_ptr(field, format_field->offset); 229 } 230 231 struct syscall_tp { 232 struct tp_field id; 233 union { 234 struct tp_field args, ret; 235 }; 236 }; 237 238 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, 239 struct tp_field *field, 240 const char *name) 241 { 242 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 243 244 if (format_field == NULL) 245 return -1; 246 247 return tp_field__init_uint(field, format_field, evsel->needs_swap); 248 } 249 250 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 251 ({ struct syscall_tp *sc = evsel->priv;\ 252 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 253 254 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, 255 struct tp_field *field, 256 const char *name) 257 { 258 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 259 260 if (format_field == NULL) 261 return -1; 262 263 return tp_field__init_ptr(field, format_field); 264 } 265 266 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 267 ({ struct syscall_tp *sc = evsel->priv;\ 268 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 269 270 static void perf_evsel__delete_priv(struct perf_evsel *evsel) 271 { 272 zfree(&evsel->priv); 273 perf_evsel__delete(evsel); 274 } 275 276 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel) 277 { 278 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 279 280 if (evsel->priv != NULL) { 281 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 282 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 283 goto out_delete; 284 return 0; 285 } 286 287 return -ENOMEM; 288 out_delete: 289 zfree(&evsel->priv); 290 return -ENOENT; 291 } 292 293 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp) 294 { 295 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 296 297 if (evsel->priv != NULL) { 298 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); 299 if (syscall_id == NULL) 300 syscall_id = perf_evsel__field(tp, "__syscall_nr"); 301 if (syscall_id == NULL) 302 goto out_delete; 303 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 304 goto out_delete; 305 306 return 0; 307 } 308 309 return -ENOMEM; 310 out_delete: 311 zfree(&evsel->priv); 312 return -EINVAL; 313 } 314 315 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel) 316 { 317 struct syscall_tp *sc = evsel->priv; 318 319 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 320 } 321 322 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel) 323 { 324 struct syscall_tp *sc = evsel->priv; 325 326 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 327 } 328 329 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler) 330 { 331 evsel->priv = malloc(sizeof(struct syscall_tp)); 332 if (evsel->priv != NULL) { 333 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 334 goto out_delete; 335 336 evsel->handler = handler; 337 return 0; 338 } 339 340 return -ENOMEM; 341 342 out_delete: 343 zfree(&evsel->priv); 344 return -ENOENT; 345 } 346 347 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 348 { 349 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); 350 351 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 352 if (IS_ERR(evsel)) 353 evsel = perf_evsel__newtp("syscalls", direction); 354 355 if (IS_ERR(evsel)) 356 return NULL; 357 358 if (perf_evsel__init_raw_syscall_tp(evsel, handler)) 359 goto out_delete; 360 361 return evsel; 362 363 out_delete: 364 perf_evsel__delete_priv(evsel); 365 return NULL; 366 } 367 368 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 369 ({ struct syscall_tp *fields = evsel->priv; \ 370 fields->name.integer(&fields->name, sample); }) 371 372 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 373 ({ struct syscall_tp *fields = evsel->priv; \ 374 fields->name.pointer(&fields->name, sample); }) 375 376 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 377 { 378 int idx = val - sa->offset; 379 380 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 381 size_t printed = scnprintf(bf, size, intfmt, val); 382 if (show_prefix) 383 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 384 return printed; 385 } 386 387 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 388 } 389 390 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 391 const char *intfmt, 392 struct syscall_arg *arg) 393 { 394 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 395 } 396 397 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 398 struct syscall_arg *arg) 399 { 400 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 401 } 402 403 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 404 405 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 406 { 407 size_t printed; 408 int i; 409 410 for (i = 0; i < sas->nr_entries; ++i) { 411 struct strarray *sa = sas->entries[i]; 412 int idx = val - sa->offset; 413 414 if (idx >= 0 && idx < sa->nr_entries) { 415 if (sa->entries[idx] == NULL) 416 break; 417 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 418 } 419 } 420 421 printed = scnprintf(bf, size, intfmt, val); 422 if (show_prefix) 423 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 424 return printed; 425 } 426 427 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 428 struct syscall_arg *arg) 429 { 430 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 431 } 432 433 #ifndef AT_FDCWD 434 #define AT_FDCWD -100 435 #endif 436 437 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 438 struct syscall_arg *arg) 439 { 440 int fd = arg->val; 441 const char *prefix = "AT_FD"; 442 443 if (fd == AT_FDCWD) 444 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 445 446 return syscall_arg__scnprintf_fd(bf, size, arg); 447 } 448 449 #define SCA_FDAT syscall_arg__scnprintf_fd_at 450 451 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 452 struct syscall_arg *arg); 453 454 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 455 456 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 457 { 458 return scnprintf(bf, size, "%#lx", arg->val); 459 } 460 461 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 462 { 463 if (arg->val == 0) 464 return scnprintf(bf, size, "NULL"); 465 return syscall_arg__scnprintf_hex(bf, size, arg); 466 } 467 468 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 469 { 470 return scnprintf(bf, size, "%d", arg->val); 471 } 472 473 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 474 { 475 return scnprintf(bf, size, "%ld", arg->val); 476 } 477 478 static const char *bpf_cmd[] = { 479 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 480 "MAP_GET_NEXT_KEY", "PROG_LOAD", 481 }; 482 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 483 484 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 485 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 486 487 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 488 static DEFINE_STRARRAY(itimers, "ITIMER_"); 489 490 static const char *keyctl_options[] = { 491 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 492 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 493 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 494 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 495 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 496 }; 497 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 498 499 static const char *whences[] = { "SET", "CUR", "END", 500 #ifdef SEEK_DATA 501 "DATA", 502 #endif 503 #ifdef SEEK_HOLE 504 "HOLE", 505 #endif 506 }; 507 static DEFINE_STRARRAY(whences, "SEEK_"); 508 509 static const char *fcntl_cmds[] = { 510 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 511 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 512 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 513 "GETOWNER_UIDS", 514 }; 515 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 516 517 static const char *fcntl_linux_specific_cmds[] = { 518 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 519 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 520 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 521 }; 522 523 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 524 525 static struct strarray *fcntl_cmds_arrays[] = { 526 &strarray__fcntl_cmds, 527 &strarray__fcntl_linux_specific_cmds, 528 }; 529 530 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 531 532 static const char *rlimit_resources[] = { 533 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 534 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 535 "RTTIME", 536 }; 537 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 538 539 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 540 static DEFINE_STRARRAY(sighow, "SIG_"); 541 542 static const char *clockid[] = { 543 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 544 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 545 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 546 }; 547 static DEFINE_STRARRAY(clockid, "CLOCK_"); 548 549 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 550 struct syscall_arg *arg) 551 { 552 bool show_prefix = arg->show_string_prefix; 553 const char *suffix = "_OK"; 554 size_t printed = 0; 555 int mode = arg->val; 556 557 if (mode == F_OK) /* 0 */ 558 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 559 #define P_MODE(n) \ 560 if (mode & n##_OK) { \ 561 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 562 mode &= ~n##_OK; \ 563 } 564 565 P_MODE(R); 566 P_MODE(W); 567 P_MODE(X); 568 #undef P_MODE 569 570 if (mode) 571 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 572 573 return printed; 574 } 575 576 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 577 578 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 579 struct syscall_arg *arg); 580 581 #define SCA_FILENAME syscall_arg__scnprintf_filename 582 583 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 584 struct syscall_arg *arg) 585 { 586 bool show_prefix = arg->show_string_prefix; 587 const char *prefix = "O_"; 588 int printed = 0, flags = arg->val; 589 590 #define P_FLAG(n) \ 591 if (flags & O_##n) { \ 592 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 593 flags &= ~O_##n; \ 594 } 595 596 P_FLAG(CLOEXEC); 597 P_FLAG(NONBLOCK); 598 #undef P_FLAG 599 600 if (flags) 601 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 602 603 return printed; 604 } 605 606 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 607 608 #ifndef GRND_NONBLOCK 609 #define GRND_NONBLOCK 0x0001 610 #endif 611 #ifndef GRND_RANDOM 612 #define GRND_RANDOM 0x0002 613 #endif 614 615 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 616 struct syscall_arg *arg) 617 { 618 bool show_prefix = arg->show_string_prefix; 619 const char *prefix = "GRND_"; 620 int printed = 0, flags = arg->val; 621 622 #define P_FLAG(n) \ 623 if (flags & GRND_##n) { \ 624 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 625 flags &= ~GRND_##n; \ 626 } 627 628 P_FLAG(RANDOM); 629 P_FLAG(NONBLOCK); 630 #undef P_FLAG 631 632 if (flags) 633 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 634 635 return printed; 636 } 637 638 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 639 640 #define STRARRAY(name, array) \ 641 { .scnprintf = SCA_STRARRAY, \ 642 .parm = &strarray__##array, } 643 644 #include "trace/beauty/arch_errno_names.c" 645 #include "trace/beauty/eventfd.c" 646 #include "trace/beauty/futex_op.c" 647 #include "trace/beauty/futex_val3.c" 648 #include "trace/beauty/mmap.c" 649 #include "trace/beauty/mode_t.c" 650 #include "trace/beauty/msg_flags.c" 651 #include "trace/beauty/open_flags.c" 652 #include "trace/beauty/perf_event_open.c" 653 #include "trace/beauty/pid.c" 654 #include "trace/beauty/sched_policy.c" 655 #include "trace/beauty/seccomp.c" 656 #include "trace/beauty/signum.c" 657 #include "trace/beauty/socket_type.c" 658 #include "trace/beauty/waitid_options.c" 659 660 struct syscall_arg_fmt { 661 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 662 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 663 void *parm; 664 const char *name; 665 bool show_zero; 666 }; 667 668 static struct syscall_fmt { 669 const char *name; 670 const char *alias; 671 struct syscall_arg_fmt arg[6]; 672 u8 nr_args; 673 bool errpid; 674 bool timeout; 675 bool hexret; 676 } syscall_fmts[] = { 677 { .name = "access", 678 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 679 { .name = "arch_prctl", 680 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 681 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 682 { .name = "bind", 683 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, 684 { .name = "bpf", 685 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 686 { .name = "brk", .hexret = true, 687 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 688 { .name = "clock_gettime", 689 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 690 { .name = "clone", .errpid = true, .nr_args = 5, 691 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 692 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 693 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 694 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 695 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 696 { .name = "close", 697 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 698 { .name = "connect", 699 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, 700 { .name = "epoll_ctl", 701 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 702 { .name = "eventfd2", 703 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 704 { .name = "fchmodat", 705 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 706 { .name = "fchownat", 707 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 708 { .name = "fcntl", 709 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 710 .parm = &strarrays__fcntl_cmds_arrays, 711 .show_zero = true, }, 712 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 713 { .name = "flock", 714 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 715 { .name = "fstat", .alias = "newfstat", }, 716 { .name = "fstatat", .alias = "newfstatat", }, 717 { .name = "futex", 718 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 719 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 720 { .name = "futimesat", 721 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 722 { .name = "getitimer", 723 .arg = { [0] = STRARRAY(which, itimers), }, }, 724 { .name = "getpid", .errpid = true, }, 725 { .name = "getpgid", .errpid = true, }, 726 { .name = "getppid", .errpid = true, }, 727 { .name = "getrandom", 728 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 729 { .name = "getrlimit", 730 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 731 { .name = "gettid", .errpid = true, }, 732 { .name = "ioctl", 733 .arg = { 734 #if defined(__i386__) || defined(__x86_64__) 735 /* 736 * FIXME: Make this available to all arches. 737 */ 738 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 739 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 740 #else 741 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 742 #endif 743 { .name = "kcmp", .nr_args = 5, 744 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 745 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 746 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 747 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 748 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 749 { .name = "keyctl", 750 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 751 { .name = "kill", 752 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 753 { .name = "linkat", 754 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 755 { .name = "lseek", 756 .arg = { [2] = STRARRAY(whence, whences), }, }, 757 { .name = "lstat", .alias = "newlstat", }, 758 { .name = "madvise", 759 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 760 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 761 { .name = "mkdirat", 762 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 763 { .name = "mknodat", 764 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 765 { .name = "mmap", .hexret = true, 766 /* The standard mmap maps to old_mmap on s390x */ 767 #if defined(__s390x__) 768 .alias = "old_mmap", 769 #endif 770 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 771 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 772 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 773 { .name = "mount", 774 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 775 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 776 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 777 { .name = "mprotect", 778 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 779 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 780 { .name = "mq_unlink", 781 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 782 { .name = "mremap", .hexret = true, 783 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 784 { .name = "name_to_handle_at", 785 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 786 { .name = "newfstatat", 787 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 788 { .name = "open", 789 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 790 { .name = "open_by_handle_at", 791 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 792 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 793 { .name = "openat", 794 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 795 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 796 { .name = "perf_event_open", 797 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 798 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 799 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 800 { .name = "pipe2", 801 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 802 { .name = "pkey_alloc", 803 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 804 { .name = "pkey_free", 805 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 806 { .name = "pkey_mprotect", 807 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 808 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 809 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 810 { .name = "poll", .timeout = true, }, 811 { .name = "ppoll", .timeout = true, }, 812 { .name = "prctl", 813 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 814 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 815 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 816 { .name = "pread", .alias = "pread64", }, 817 { .name = "preadv", .alias = "pread", }, 818 { .name = "prlimit64", 819 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 820 { .name = "pwrite", .alias = "pwrite64", }, 821 { .name = "readlinkat", 822 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 823 { .name = "recvfrom", 824 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 825 { .name = "recvmmsg", 826 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 827 { .name = "recvmsg", 828 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 829 { .name = "renameat", 830 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 831 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 832 { .name = "renameat2", 833 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 834 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 835 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 836 { .name = "rt_sigaction", 837 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 838 { .name = "rt_sigprocmask", 839 .arg = { [0] = STRARRAY(how, sighow), }, }, 840 { .name = "rt_sigqueueinfo", 841 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 842 { .name = "rt_tgsigqueueinfo", 843 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 844 { .name = "sched_setscheduler", 845 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 846 { .name = "seccomp", 847 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 848 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 849 { .name = "select", .timeout = true, }, 850 { .name = "sendmmsg", 851 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 852 { .name = "sendmsg", 853 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 854 { .name = "sendto", 855 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 856 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 857 { .name = "set_tid_address", .errpid = true, }, 858 { .name = "setitimer", 859 .arg = { [0] = STRARRAY(which, itimers), }, }, 860 { .name = "setrlimit", 861 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 862 { .name = "socket", 863 .arg = { [0] = STRARRAY(family, socket_families), 864 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 865 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 866 { .name = "socketpair", 867 .arg = { [0] = STRARRAY(family, socket_families), 868 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 869 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 870 { .name = "stat", .alias = "newstat", }, 871 { .name = "statx", 872 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 873 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 874 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 875 { .name = "swapoff", 876 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 877 { .name = "swapon", 878 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 879 { .name = "symlinkat", 880 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 881 { .name = "tgkill", 882 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 883 { .name = "tkill", 884 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 885 { .name = "umount2", .alias = "umount", 886 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 887 { .name = "uname", .alias = "newuname", }, 888 { .name = "unlinkat", 889 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 890 { .name = "utimensat", 891 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 892 { .name = "wait4", .errpid = true, 893 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 894 { .name = "waitid", .errpid = true, 895 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 896 }; 897 898 static int syscall_fmt__cmp(const void *name, const void *fmtp) 899 { 900 const struct syscall_fmt *fmt = fmtp; 901 return strcmp(name, fmt->name); 902 } 903 904 static struct syscall_fmt *syscall_fmt__find(const char *name) 905 { 906 const int nmemb = ARRAY_SIZE(syscall_fmts); 907 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 908 } 909 910 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 911 { 912 int i, nmemb = ARRAY_SIZE(syscall_fmts); 913 914 for (i = 0; i < nmemb; ++i) { 915 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 916 return &syscall_fmts[i]; 917 } 918 919 return NULL; 920 } 921 922 /* 923 * is_exit: is this "exit" or "exit_group"? 924 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 925 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 926 */ 927 struct syscall { 928 struct tep_event *tp_format; 929 int nr_args; 930 int args_size; 931 bool is_exit; 932 bool is_open; 933 struct tep_format_field *args; 934 const char *name; 935 struct syscall_fmt *fmt; 936 struct syscall_arg_fmt *arg_fmt; 937 }; 938 939 struct bpf_map_syscall_entry { 940 bool enabled; 941 }; 942 943 /* 944 * We need to have this 'calculated' boolean because in some cases we really 945 * don't know what is the duration of a syscall, for instance, when we start 946 * a session and some threads are waiting for a syscall to finish, say 'poll', 947 * in which case all we can do is to print "( ? ) for duration and for the 948 * start timestamp. 949 */ 950 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 951 { 952 double duration = (double)t / NSEC_PER_MSEC; 953 size_t printed = fprintf(fp, "("); 954 955 if (!calculated) 956 printed += fprintf(fp, " "); 957 else if (duration >= 1.0) 958 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 959 else if (duration >= 0.01) 960 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 961 else 962 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 963 return printed + fprintf(fp, "): "); 964 } 965 966 /** 967 * filename.ptr: The filename char pointer that will be vfs_getname'd 968 * filename.entry_str_pos: Where to insert the string translated from 969 * filename.ptr by the vfs_getname tracepoint/kprobe. 970 * ret_scnprintf: syscall args may set this to a different syscall return 971 * formatter, for instance, fcntl may return fds, file flags, etc. 972 */ 973 struct thread_trace { 974 u64 entry_time; 975 bool entry_pending; 976 unsigned long nr_events; 977 unsigned long pfmaj, pfmin; 978 char *entry_str; 979 double runtime_ms; 980 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 981 struct { 982 unsigned long ptr; 983 short int entry_str_pos; 984 bool pending_open; 985 unsigned int namelen; 986 char *name; 987 } filename; 988 struct { 989 int max; 990 struct file *table; 991 } files; 992 993 struct intlist *syscall_stats; 994 }; 995 996 static struct thread_trace *thread_trace__new(void) 997 { 998 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 999 1000 if (ttrace) 1001 ttrace->files.max = -1; 1002 1003 ttrace->syscall_stats = intlist__new(NULL); 1004 1005 return ttrace; 1006 } 1007 1008 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1009 { 1010 struct thread_trace *ttrace; 1011 1012 if (thread == NULL) 1013 goto fail; 1014 1015 if (thread__priv(thread) == NULL) 1016 thread__set_priv(thread, thread_trace__new()); 1017 1018 if (thread__priv(thread) == NULL) 1019 goto fail; 1020 1021 ttrace = thread__priv(thread); 1022 ++ttrace->nr_events; 1023 1024 return ttrace; 1025 fail: 1026 color_fprintf(fp, PERF_COLOR_RED, 1027 "WARNING: not enough memory, dropping samples!\n"); 1028 return NULL; 1029 } 1030 1031 1032 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1033 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1034 { 1035 struct thread_trace *ttrace = thread__priv(arg->thread); 1036 1037 ttrace->ret_scnprintf = ret_scnprintf; 1038 } 1039 1040 #define TRACE_PFMAJ (1 << 0) 1041 #define TRACE_PFMIN (1 << 1) 1042 1043 static const size_t trace__entry_str_size = 2048; 1044 1045 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1046 { 1047 if (fd < 0) 1048 return NULL; 1049 1050 if (fd > ttrace->files.max) { 1051 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1052 1053 if (nfiles == NULL) 1054 return NULL; 1055 1056 if (ttrace->files.max != -1) { 1057 memset(nfiles + ttrace->files.max + 1, 0, 1058 (fd - ttrace->files.max) * sizeof(struct file)); 1059 } else { 1060 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1061 } 1062 1063 ttrace->files.table = nfiles; 1064 ttrace->files.max = fd; 1065 } 1066 1067 return ttrace->files.table + fd; 1068 } 1069 1070 struct file *thread__files_entry(struct thread *thread, int fd) 1071 { 1072 return thread_trace__files_entry(thread__priv(thread), fd); 1073 } 1074 1075 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1076 { 1077 struct thread_trace *ttrace = thread__priv(thread); 1078 struct file *file = thread_trace__files_entry(ttrace, fd); 1079 1080 if (file != NULL) { 1081 struct stat st; 1082 if (stat(pathname, &st) == 0) 1083 file->dev_maj = major(st.st_rdev); 1084 file->pathname = strdup(pathname); 1085 if (file->pathname) 1086 return 0; 1087 } 1088 1089 return -1; 1090 } 1091 1092 static int thread__read_fd_path(struct thread *thread, int fd) 1093 { 1094 char linkname[PATH_MAX], pathname[PATH_MAX]; 1095 struct stat st; 1096 int ret; 1097 1098 if (thread->pid_ == thread->tid) { 1099 scnprintf(linkname, sizeof(linkname), 1100 "/proc/%d/fd/%d", thread->pid_, fd); 1101 } else { 1102 scnprintf(linkname, sizeof(linkname), 1103 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1104 } 1105 1106 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1107 return -1; 1108 1109 ret = readlink(linkname, pathname, sizeof(pathname)); 1110 1111 if (ret < 0 || ret > st.st_size) 1112 return -1; 1113 1114 pathname[ret] = '\0'; 1115 return trace__set_fd_pathname(thread, fd, pathname); 1116 } 1117 1118 static const char *thread__fd_path(struct thread *thread, int fd, 1119 struct trace *trace) 1120 { 1121 struct thread_trace *ttrace = thread__priv(thread); 1122 1123 if (ttrace == NULL) 1124 return NULL; 1125 1126 if (fd < 0) 1127 return NULL; 1128 1129 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1130 if (!trace->live) 1131 return NULL; 1132 ++trace->stats.proc_getname; 1133 if (thread__read_fd_path(thread, fd)) 1134 return NULL; 1135 } 1136 1137 return ttrace->files.table[fd].pathname; 1138 } 1139 1140 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1141 { 1142 int fd = arg->val; 1143 size_t printed = scnprintf(bf, size, "%d", fd); 1144 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1145 1146 if (path) 1147 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1148 1149 return printed; 1150 } 1151 1152 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1153 { 1154 size_t printed = scnprintf(bf, size, "%d", fd); 1155 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1156 1157 if (thread) { 1158 const char *path = thread__fd_path(thread, fd, trace); 1159 1160 if (path) 1161 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1162 1163 thread__put(thread); 1164 } 1165 1166 return printed; 1167 } 1168 1169 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1170 struct syscall_arg *arg) 1171 { 1172 int fd = arg->val; 1173 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1174 struct thread_trace *ttrace = thread__priv(arg->thread); 1175 1176 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1177 zfree(&ttrace->files.table[fd].pathname); 1178 1179 return printed; 1180 } 1181 1182 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1183 unsigned long ptr) 1184 { 1185 struct thread_trace *ttrace = thread__priv(thread); 1186 1187 ttrace->filename.ptr = ptr; 1188 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1189 } 1190 1191 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1192 { 1193 struct augmented_arg *augmented_arg = arg->augmented.args; 1194 1195 return scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1196 } 1197 1198 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1199 struct syscall_arg *arg) 1200 { 1201 unsigned long ptr = arg->val; 1202 1203 if (arg->augmented.args) 1204 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1205 1206 if (!arg->trace->vfs_getname) 1207 return scnprintf(bf, size, "%#x", ptr); 1208 1209 thread__set_filename_pos(arg->thread, bf, ptr); 1210 return 0; 1211 } 1212 1213 static bool trace__filter_duration(struct trace *trace, double t) 1214 { 1215 return t < (trace->duration_filter * NSEC_PER_MSEC); 1216 } 1217 1218 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1219 { 1220 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1221 1222 return fprintf(fp, "%10.3f ", ts); 1223 } 1224 1225 /* 1226 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1227 * using ttrace->entry_time for a thread that receives a sys_exit without 1228 * first having received a sys_enter ("poll" issued before tracing session 1229 * starts, lost sys_enter exit due to ring buffer overflow). 1230 */ 1231 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1232 { 1233 if (tstamp > 0) 1234 return __trace__fprintf_tstamp(trace, tstamp, fp); 1235 1236 return fprintf(fp, " ? "); 1237 } 1238 1239 static bool done = false; 1240 static bool interrupted = false; 1241 1242 static void sig_handler(int sig) 1243 { 1244 done = true; 1245 interrupted = sig == SIGINT; 1246 } 1247 1248 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1249 { 1250 size_t printed = 0; 1251 1252 if (trace->multiple_threads) { 1253 if (trace->show_comm) 1254 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1255 printed += fprintf(fp, "%d ", thread->tid); 1256 } 1257 1258 return printed; 1259 } 1260 1261 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1262 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1263 { 1264 size_t printed = 0; 1265 1266 if (trace->show_tstamp) 1267 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1268 if (trace->show_duration) 1269 printed += fprintf_duration(duration, duration_calculated, fp); 1270 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1271 } 1272 1273 static int trace__process_event(struct trace *trace, struct machine *machine, 1274 union perf_event *event, struct perf_sample *sample) 1275 { 1276 int ret = 0; 1277 1278 switch (event->header.type) { 1279 case PERF_RECORD_LOST: 1280 color_fprintf(trace->output, PERF_COLOR_RED, 1281 "LOST %" PRIu64 " events!\n", event->lost.lost); 1282 ret = machine__process_lost_event(machine, event, sample); 1283 break; 1284 default: 1285 ret = machine__process_event(machine, event, sample); 1286 break; 1287 } 1288 1289 return ret; 1290 } 1291 1292 static int trace__tool_process(struct perf_tool *tool, 1293 union perf_event *event, 1294 struct perf_sample *sample, 1295 struct machine *machine) 1296 { 1297 struct trace *trace = container_of(tool, struct trace, tool); 1298 return trace__process_event(trace, machine, event, sample); 1299 } 1300 1301 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1302 { 1303 struct machine *machine = vmachine; 1304 1305 if (machine->kptr_restrict_warned) 1306 return NULL; 1307 1308 if (symbol_conf.kptr_restrict) { 1309 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1310 "Check /proc/sys/kernel/kptr_restrict.\n\n" 1311 "Kernel samples will not be resolved.\n"); 1312 machine->kptr_restrict_warned = true; 1313 return NULL; 1314 } 1315 1316 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1317 } 1318 1319 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 1320 { 1321 int err = symbol__init(NULL); 1322 1323 if (err) 1324 return err; 1325 1326 trace->host = machine__new_host(); 1327 if (trace->host == NULL) 1328 return -ENOMEM; 1329 1330 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1331 if (err < 0) 1332 goto out; 1333 1334 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1335 evlist->threads, trace__tool_process, false, 1336 1); 1337 out: 1338 if (err) 1339 symbol__exit(); 1340 1341 return err; 1342 } 1343 1344 static void trace__symbols__exit(struct trace *trace) 1345 { 1346 machine__exit(trace->host); 1347 trace->host = NULL; 1348 1349 symbol__exit(); 1350 } 1351 1352 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1353 { 1354 int idx; 1355 1356 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1357 nr_args = sc->fmt->nr_args; 1358 1359 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1360 if (sc->arg_fmt == NULL) 1361 return -1; 1362 1363 for (idx = 0; idx < nr_args; ++idx) { 1364 if (sc->fmt) 1365 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1366 } 1367 1368 sc->nr_args = nr_args; 1369 return 0; 1370 } 1371 1372 static int syscall__set_arg_fmts(struct syscall *sc) 1373 { 1374 struct tep_format_field *field, *last_field = NULL; 1375 int idx = 0, len; 1376 1377 for (field = sc->args; field; field = field->next, ++idx) { 1378 last_field = field; 1379 1380 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1381 continue; 1382 1383 if (strcmp(field->type, "const char *") == 0 && 1384 (strcmp(field->name, "filename") == 0 || 1385 strcmp(field->name, "path") == 0 || 1386 strcmp(field->name, "pathname") == 0)) 1387 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1388 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1389 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1390 else if (strcmp(field->type, "pid_t") == 0) 1391 sc->arg_fmt[idx].scnprintf = SCA_PID; 1392 else if (strcmp(field->type, "umode_t") == 0) 1393 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1394 else if ((strcmp(field->type, "int") == 0 || 1395 strcmp(field->type, "unsigned int") == 0 || 1396 strcmp(field->type, "long") == 0) && 1397 (len = strlen(field->name)) >= 2 && 1398 strcmp(field->name + len - 2, "fd") == 0) { 1399 /* 1400 * /sys/kernel/tracing/events/syscalls/sys_enter* 1401 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1402 * 65 int 1403 * 23 unsigned int 1404 * 7 unsigned long 1405 */ 1406 sc->arg_fmt[idx].scnprintf = SCA_FD; 1407 } 1408 } 1409 1410 if (last_field) 1411 sc->args_size = last_field->offset + last_field->size; 1412 1413 return 0; 1414 } 1415 1416 static int trace__read_syscall_info(struct trace *trace, int id) 1417 { 1418 char tp_name[128]; 1419 struct syscall *sc; 1420 const char *name = syscalltbl__name(trace->sctbl, id); 1421 1422 if (name == NULL) 1423 return -1; 1424 1425 if (id > trace->syscalls.max) { 1426 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1427 1428 if (nsyscalls == NULL) 1429 return -1; 1430 1431 if (trace->syscalls.max != -1) { 1432 memset(nsyscalls + trace->syscalls.max + 1, 0, 1433 (id - trace->syscalls.max) * sizeof(*sc)); 1434 } else { 1435 memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); 1436 } 1437 1438 trace->syscalls.table = nsyscalls; 1439 trace->syscalls.max = id; 1440 } 1441 1442 sc = trace->syscalls.table + id; 1443 sc->name = name; 1444 1445 sc->fmt = syscall_fmt__find(sc->name); 1446 1447 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1448 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1449 1450 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1451 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1452 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1453 } 1454 1455 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1456 return -1; 1457 1458 if (IS_ERR(sc->tp_format)) 1459 return -1; 1460 1461 sc->args = sc->tp_format->format.fields; 1462 /* 1463 * We need to check and discard the first variable '__syscall_nr' 1464 * or 'nr' that mean the syscall number. It is needless here. 1465 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1466 */ 1467 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1468 sc->args = sc->args->next; 1469 --sc->nr_args; 1470 } 1471 1472 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1473 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1474 1475 return syscall__set_arg_fmts(sc); 1476 } 1477 1478 static int trace__validate_ev_qualifier(struct trace *trace) 1479 { 1480 int err = 0, i; 1481 size_t nr_allocated; 1482 struct str_node *pos; 1483 1484 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier); 1485 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr * 1486 sizeof(trace->ev_qualifier_ids.entries[0])); 1487 1488 if (trace->ev_qualifier_ids.entries == NULL) { 1489 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1490 trace->output); 1491 err = -EINVAL; 1492 goto out; 1493 } 1494 1495 nr_allocated = trace->ev_qualifier_ids.nr; 1496 i = 0; 1497 1498 strlist__for_each_entry(pos, trace->ev_qualifier) { 1499 const char *sc = pos->s; 1500 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1501 1502 if (id < 0) { 1503 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1504 if (id >= 0) 1505 goto matches; 1506 1507 if (err == 0) { 1508 fputs("Error:\tInvalid syscall ", trace->output); 1509 err = -EINVAL; 1510 } else { 1511 fputs(", ", trace->output); 1512 } 1513 1514 fputs(sc, trace->output); 1515 } 1516 matches: 1517 trace->ev_qualifier_ids.entries[i++] = id; 1518 if (match_next == -1) 1519 continue; 1520 1521 while (1) { 1522 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1523 if (id < 0) 1524 break; 1525 if (nr_allocated == trace->ev_qualifier_ids.nr) { 1526 void *entries; 1527 1528 nr_allocated += 8; 1529 entries = realloc(trace->ev_qualifier_ids.entries, 1530 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1531 if (entries == NULL) { 1532 err = -ENOMEM; 1533 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1534 goto out_free; 1535 } 1536 trace->ev_qualifier_ids.entries = entries; 1537 } 1538 trace->ev_qualifier_ids.nr++; 1539 trace->ev_qualifier_ids.entries[i++] = id; 1540 } 1541 } 1542 1543 if (err < 0) { 1544 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'" 1545 "\nHint:\tand: 'man syscalls'\n", trace->output); 1546 out_free: 1547 zfree(&trace->ev_qualifier_ids.entries); 1548 trace->ev_qualifier_ids.nr = 0; 1549 } 1550 out: 1551 return err; 1552 } 1553 1554 /* 1555 * args is to be interpreted as a series of longs but we need to handle 1556 * 8-byte unaligned accesses. args points to raw_data within the event 1557 * and raw_data is guaranteed to be 8-byte unaligned because it is 1558 * preceded by raw_size which is a u32. So we need to copy args to a temp 1559 * variable to read it. Most notably this avoids extended load instructions 1560 * on unaligned addresses 1561 */ 1562 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1563 { 1564 unsigned long val; 1565 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1566 1567 memcpy(&val, p, sizeof(val)); 1568 return val; 1569 } 1570 1571 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1572 struct syscall_arg *arg) 1573 { 1574 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1575 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1576 1577 return scnprintf(bf, size, "arg%d: ", arg->idx); 1578 } 1579 1580 /* 1581 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1582 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1583 * in tools/perf/trace/beauty/mount_flags.c 1584 */ 1585 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1586 { 1587 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1588 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1589 1590 return val; 1591 } 1592 1593 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1594 struct syscall_arg *arg, unsigned long val) 1595 { 1596 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1597 arg->val = val; 1598 if (sc->arg_fmt[arg->idx].parm) 1599 arg->parm = sc->arg_fmt[arg->idx].parm; 1600 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1601 } 1602 return scnprintf(bf, size, "%ld", val); 1603 } 1604 1605 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1606 unsigned char *args, void *augmented_args, int augmented_args_size, 1607 struct trace *trace, struct thread *thread) 1608 { 1609 size_t printed = 0; 1610 unsigned long val; 1611 u8 bit = 1; 1612 struct syscall_arg arg = { 1613 .args = args, 1614 .augmented = { 1615 .size = augmented_args_size, 1616 .args = augmented_args, 1617 }, 1618 .idx = 0, 1619 .mask = 0, 1620 .trace = trace, 1621 .thread = thread, 1622 .show_string_prefix = trace->show_string_prefix, 1623 }; 1624 struct thread_trace *ttrace = thread__priv(thread); 1625 1626 /* 1627 * Things like fcntl will set this in its 'cmd' formatter to pick the 1628 * right formatter for the return value (an fd? file flags?), which is 1629 * not needed for syscalls that always return a given type, say an fd. 1630 */ 1631 ttrace->ret_scnprintf = NULL; 1632 1633 if (sc->args != NULL) { 1634 struct tep_format_field *field; 1635 1636 for (field = sc->args; field; 1637 field = field->next, ++arg.idx, bit <<= 1) { 1638 if (arg.mask & bit) 1639 continue; 1640 1641 val = syscall_arg__val(&arg, arg.idx); 1642 /* 1643 * Some syscall args need some mask, most don't and 1644 * return val untouched. 1645 */ 1646 val = syscall__mask_val(sc, &arg, val); 1647 1648 /* 1649 * Suppress this argument if its value is zero and 1650 * and we don't have a string associated in an 1651 * strarray for it. 1652 */ 1653 if (val == 0 && 1654 !trace->show_zeros && 1655 !(sc->arg_fmt && 1656 (sc->arg_fmt[arg.idx].show_zero || 1657 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1658 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1659 sc->arg_fmt[arg.idx].parm)) 1660 continue; 1661 1662 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1663 1664 if (trace->show_arg_names) 1665 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1666 1667 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1668 } 1669 } else if (IS_ERR(sc->tp_format)) { 1670 /* 1671 * If we managed to read the tracepoint /format file, then we 1672 * may end up not having any args, like with gettid(), so only 1673 * print the raw args when we didn't manage to read it. 1674 */ 1675 while (arg.idx < sc->nr_args) { 1676 if (arg.mask & bit) 1677 goto next_arg; 1678 val = syscall_arg__val(&arg, arg.idx); 1679 if (printed) 1680 printed += scnprintf(bf + printed, size - printed, ", "); 1681 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1682 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1683 next_arg: 1684 ++arg.idx; 1685 bit <<= 1; 1686 } 1687 } 1688 1689 return printed; 1690 } 1691 1692 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, 1693 union perf_event *event, 1694 struct perf_sample *sample); 1695 1696 static struct syscall *trace__syscall_info(struct trace *trace, 1697 struct perf_evsel *evsel, int id) 1698 { 1699 1700 if (id < 0) { 1701 1702 /* 1703 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1704 * before that, leaving at a higher verbosity level till that is 1705 * explained. Reproduced with plain ftrace with: 1706 * 1707 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1708 * grep "NR -1 " /t/trace_pipe 1709 * 1710 * After generating some load on the machine. 1711 */ 1712 if (verbose > 1) { 1713 static u64 n; 1714 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1715 id, perf_evsel__name(evsel), ++n); 1716 } 1717 return NULL; 1718 } 1719 1720 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && 1721 trace__read_syscall_info(trace, id)) 1722 goto out_cant_read; 1723 1724 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) 1725 goto out_cant_read; 1726 1727 return &trace->syscalls.table[id]; 1728 1729 out_cant_read: 1730 if (verbose > 0) { 1731 fprintf(trace->output, "Problems reading syscall %d", id); 1732 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) 1733 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1734 fputs(" information\n", trace->output); 1735 } 1736 return NULL; 1737 } 1738 1739 static void thread__update_stats(struct thread_trace *ttrace, 1740 int id, struct perf_sample *sample) 1741 { 1742 struct int_node *inode; 1743 struct stats *stats; 1744 u64 duration = 0; 1745 1746 inode = intlist__findnew(ttrace->syscall_stats, id); 1747 if (inode == NULL) 1748 return; 1749 1750 stats = inode->priv; 1751 if (stats == NULL) { 1752 stats = malloc(sizeof(struct stats)); 1753 if (stats == NULL) 1754 return; 1755 init_stats(stats); 1756 inode->priv = stats; 1757 } 1758 1759 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1760 duration = sample->time - ttrace->entry_time; 1761 1762 update_stats(stats, duration); 1763 } 1764 1765 static int trace__printf_interrupted_entry(struct trace *trace) 1766 { 1767 struct thread_trace *ttrace; 1768 size_t printed; 1769 int len; 1770 1771 if (trace->failure_only || trace->current == NULL) 1772 return 0; 1773 1774 ttrace = thread__priv(trace->current); 1775 1776 if (!ttrace->entry_pending) 1777 return 0; 1778 1779 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1780 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1781 1782 if (len < trace->args_alignment - 4) 1783 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1784 1785 printed += fprintf(trace->output, " ...\n"); 1786 1787 ttrace->entry_pending = false; 1788 ++trace->nr_events_printed; 1789 1790 return printed; 1791 } 1792 1793 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 1794 struct perf_sample *sample, struct thread *thread) 1795 { 1796 int printed = 0; 1797 1798 if (trace->print_sample) { 1799 double ts = (double)sample->time / NSEC_PER_MSEC; 1800 1801 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1802 perf_evsel__name(evsel), ts, 1803 thread__comm_str(thread), 1804 sample->pid, sample->tid, sample->cpu); 1805 } 1806 1807 return printed; 1808 } 1809 1810 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1811 { 1812 void *augmented_args = NULL; 1813 /* 1814 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1815 * and there we get all 6 syscall args plus the tracepoint common fields 1816 * that gets calculated at the start and the syscall_nr (another long). 1817 * So we check if that is the case and if so don't look after the 1818 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1819 * which is fixed. 1820 * 1821 * We'll revisit this later to pass s->args_size to the BPF augmenter 1822 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1823 * copies only what we need for each syscall, like what happens when we 1824 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1825 * traffic to just what is needed for each syscall. 1826 */ 1827 int args_size = raw_augmented_args_size ?: sc->args_size; 1828 1829 *augmented_args_size = sample->raw_size - args_size; 1830 if (*augmented_args_size > 0) 1831 augmented_args = sample->raw_data + args_size; 1832 1833 return augmented_args; 1834 } 1835 1836 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 1837 union perf_event *event __maybe_unused, 1838 struct perf_sample *sample) 1839 { 1840 char *msg; 1841 void *args; 1842 int printed = 0; 1843 struct thread *thread; 1844 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1845 int augmented_args_size = 0; 1846 void *augmented_args = NULL; 1847 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1848 struct thread_trace *ttrace; 1849 1850 if (sc == NULL) 1851 return -1; 1852 1853 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1854 ttrace = thread__trace(thread, trace->output); 1855 if (ttrace == NULL) 1856 goto out_put; 1857 1858 trace__fprintf_sample(trace, evsel, sample, thread); 1859 1860 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1861 1862 if (ttrace->entry_str == NULL) { 1863 ttrace->entry_str = malloc(trace__entry_str_size); 1864 if (!ttrace->entry_str) 1865 goto out_put; 1866 } 1867 1868 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1869 trace__printf_interrupted_entry(trace); 1870 /* 1871 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1872 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1873 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1874 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1875 * so when handling, say the openat syscall, we end up getting 6 args for the 1876 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1877 * thinking that the extra 2 u64 args are the augmented filename, so just check 1878 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1879 */ 1880 if (evsel != trace->syscalls.events.sys_enter) 1881 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1882 ttrace->entry_time = sample->time; 1883 msg = ttrace->entry_str; 1884 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1885 1886 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1887 args, augmented_args, augmented_args_size, trace, thread); 1888 1889 if (sc->is_exit) { 1890 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1891 int alignment = 0; 1892 1893 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 1894 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 1895 if (trace->args_alignment > printed) 1896 alignment = trace->args_alignment - printed; 1897 fprintf(trace->output, "%*s= ?\n", alignment, " "); 1898 } 1899 } else { 1900 ttrace->entry_pending = true; 1901 /* See trace__vfs_getname & trace__sys_exit */ 1902 ttrace->filename.pending_open = false; 1903 } 1904 1905 if (trace->current != thread) { 1906 thread__put(trace->current); 1907 trace->current = thread__get(thread); 1908 } 1909 err = 0; 1910 out_put: 1911 thread__put(thread); 1912 return err; 1913 } 1914 1915 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, 1916 struct perf_sample *sample) 1917 { 1918 struct thread_trace *ttrace; 1919 struct thread *thread; 1920 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1921 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1922 char msg[1024]; 1923 void *args, *augmented_args = NULL; 1924 int augmented_args_size; 1925 1926 if (sc == NULL) 1927 return -1; 1928 1929 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1930 ttrace = thread__trace(thread, trace->output); 1931 /* 1932 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 1933 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 1934 */ 1935 if (ttrace == NULL) 1936 goto out_put; 1937 1938 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1939 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1940 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 1941 fprintf(trace->output, "%s", msg); 1942 err = 0; 1943 out_put: 1944 thread__put(thread); 1945 return err; 1946 } 1947 1948 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, 1949 struct perf_sample *sample, 1950 struct callchain_cursor *cursor) 1951 { 1952 struct addr_location al; 1953 int max_stack = evsel->attr.sample_max_stack ? 1954 evsel->attr.sample_max_stack : 1955 trace->max_stack; 1956 int err; 1957 1958 if (machine__resolve(trace->host, &al, sample) < 0) 1959 return -1; 1960 1961 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 1962 addr_location__put(&al); 1963 return err; 1964 } 1965 1966 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 1967 { 1968 /* TODO: user-configurable print_opts */ 1969 const unsigned int print_opts = EVSEL__PRINT_SYM | 1970 EVSEL__PRINT_DSO | 1971 EVSEL__PRINT_UNKNOWN_AS_ADDR; 1972 1973 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); 1974 } 1975 1976 static const char *errno_to_name(struct perf_evsel *evsel, int err) 1977 { 1978 struct perf_env *env = perf_evsel__env(evsel); 1979 const char *arch_name = perf_env__arch(env); 1980 1981 return arch_syscalls__strerrno(arch_name, err); 1982 } 1983 1984 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 1985 union perf_event *event __maybe_unused, 1986 struct perf_sample *sample) 1987 { 1988 long ret; 1989 u64 duration = 0; 1990 bool duration_calculated = false; 1991 struct thread *thread; 1992 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 1993 int alignment = trace->args_alignment; 1994 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1995 struct thread_trace *ttrace; 1996 1997 if (sc == NULL) 1998 return -1; 1999 2000 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2001 ttrace = thread__trace(thread, trace->output); 2002 if (ttrace == NULL) 2003 goto out_put; 2004 2005 trace__fprintf_sample(trace, evsel, sample, thread); 2006 2007 if (trace->summary) 2008 thread__update_stats(ttrace, id, sample); 2009 2010 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2011 2012 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2013 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2014 ttrace->filename.pending_open = false; 2015 ++trace->stats.vfs_getname; 2016 } 2017 2018 if (ttrace->entry_time) { 2019 duration = sample->time - ttrace->entry_time; 2020 if (trace__filter_duration(trace, duration)) 2021 goto out; 2022 duration_calculated = true; 2023 } else if (trace->duration_filter) 2024 goto out; 2025 2026 if (sample->callchain) { 2027 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2028 if (callchain_ret == 0) { 2029 if (callchain_cursor.nr < trace->min_stack) 2030 goto out; 2031 callchain_ret = 1; 2032 } 2033 } 2034 2035 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2036 goto out; 2037 2038 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2039 2040 if (ttrace->entry_pending) { 2041 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2042 } else { 2043 printed += fprintf(trace->output, " ... ["); 2044 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2045 printed += 9; 2046 printed += fprintf(trace->output, "]: %s()", sc->name); 2047 } 2048 2049 printed++; /* the closing ')' */ 2050 2051 if (alignment > printed) 2052 alignment -= printed; 2053 else 2054 alignment = 0; 2055 2056 fprintf(trace->output, ")%*s= ", alignment, " "); 2057 2058 if (sc->fmt == NULL) { 2059 if (ret < 0) 2060 goto errno_print; 2061 signed_print: 2062 fprintf(trace->output, "%ld", ret); 2063 } else if (ret < 0) { 2064 errno_print: { 2065 char bf[STRERR_BUFSIZE]; 2066 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2067 *e = errno_to_name(evsel, -ret); 2068 2069 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2070 } 2071 } else if (ret == 0 && sc->fmt->timeout) 2072 fprintf(trace->output, "0 (Timeout)"); 2073 else if (ttrace->ret_scnprintf) { 2074 char bf[1024]; 2075 struct syscall_arg arg = { 2076 .val = ret, 2077 .thread = thread, 2078 .trace = trace, 2079 }; 2080 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2081 ttrace->ret_scnprintf = NULL; 2082 fprintf(trace->output, "%s", bf); 2083 } else if (sc->fmt->hexret) 2084 fprintf(trace->output, "%#lx", ret); 2085 else if (sc->fmt->errpid) { 2086 struct thread *child = machine__find_thread(trace->host, ret, ret); 2087 2088 if (child != NULL) { 2089 fprintf(trace->output, "%ld", ret); 2090 if (child->comm_set) 2091 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2092 thread__put(child); 2093 } 2094 } else 2095 goto signed_print; 2096 2097 fputc('\n', trace->output); 2098 2099 /* 2100 * We only consider an 'event' for the sake of --max-events a non-filtered 2101 * sys_enter + sys_exit and other tracepoint events. 2102 */ 2103 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2104 interrupted = true; 2105 2106 if (callchain_ret > 0) 2107 trace__fprintf_callchain(trace, sample); 2108 else if (callchain_ret < 0) 2109 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2110 out: 2111 ttrace->entry_pending = false; 2112 err = 0; 2113 out_put: 2114 thread__put(thread); 2115 return err; 2116 } 2117 2118 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, 2119 union perf_event *event __maybe_unused, 2120 struct perf_sample *sample) 2121 { 2122 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2123 struct thread_trace *ttrace; 2124 size_t filename_len, entry_str_len, to_move; 2125 ssize_t remaining_space; 2126 char *pos; 2127 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2128 2129 if (!thread) 2130 goto out; 2131 2132 ttrace = thread__priv(thread); 2133 if (!ttrace) 2134 goto out_put; 2135 2136 filename_len = strlen(filename); 2137 if (filename_len == 0) 2138 goto out_put; 2139 2140 if (ttrace->filename.namelen < filename_len) { 2141 char *f = realloc(ttrace->filename.name, filename_len + 1); 2142 2143 if (f == NULL) 2144 goto out_put; 2145 2146 ttrace->filename.namelen = filename_len; 2147 ttrace->filename.name = f; 2148 } 2149 2150 strcpy(ttrace->filename.name, filename); 2151 ttrace->filename.pending_open = true; 2152 2153 if (!ttrace->filename.ptr) 2154 goto out_put; 2155 2156 entry_str_len = strlen(ttrace->entry_str); 2157 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2158 if (remaining_space <= 0) 2159 goto out_put; 2160 2161 if (filename_len > (size_t)remaining_space) { 2162 filename += filename_len - remaining_space; 2163 filename_len = remaining_space; 2164 } 2165 2166 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2167 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2168 memmove(pos + filename_len, pos, to_move); 2169 memcpy(pos, filename, filename_len); 2170 2171 ttrace->filename.ptr = 0; 2172 ttrace->filename.entry_str_pos = 0; 2173 out_put: 2174 thread__put(thread); 2175 out: 2176 return 0; 2177 } 2178 2179 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, 2180 union perf_event *event __maybe_unused, 2181 struct perf_sample *sample) 2182 { 2183 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2184 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2185 struct thread *thread = machine__findnew_thread(trace->host, 2186 sample->pid, 2187 sample->tid); 2188 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2189 2190 if (ttrace == NULL) 2191 goto out_dump; 2192 2193 ttrace->runtime_ms += runtime_ms; 2194 trace->runtime_ms += runtime_ms; 2195 out_put: 2196 thread__put(thread); 2197 return 0; 2198 2199 out_dump: 2200 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2201 evsel->name, 2202 perf_evsel__strval(evsel, sample, "comm"), 2203 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2204 runtime, 2205 perf_evsel__intval(evsel, sample, "vruntime")); 2206 goto out_put; 2207 } 2208 2209 static int bpf_output__printer(enum binary_printer_ops op, 2210 unsigned int val, void *extra __maybe_unused, FILE *fp) 2211 { 2212 unsigned char ch = (unsigned char)val; 2213 2214 switch (op) { 2215 case BINARY_PRINT_CHAR_DATA: 2216 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2217 case BINARY_PRINT_DATA_BEGIN: 2218 case BINARY_PRINT_LINE_BEGIN: 2219 case BINARY_PRINT_ADDR: 2220 case BINARY_PRINT_NUM_DATA: 2221 case BINARY_PRINT_NUM_PAD: 2222 case BINARY_PRINT_SEP: 2223 case BINARY_PRINT_CHAR_PAD: 2224 case BINARY_PRINT_LINE_END: 2225 case BINARY_PRINT_DATA_END: 2226 default: 2227 break; 2228 } 2229 2230 return 0; 2231 } 2232 2233 static void bpf_output__fprintf(struct trace *trace, 2234 struct perf_sample *sample) 2235 { 2236 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2237 bpf_output__printer, NULL, trace->output); 2238 ++trace->nr_events_printed; 2239 } 2240 2241 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, 2242 union perf_event *event __maybe_unused, 2243 struct perf_sample *sample) 2244 { 2245 struct thread *thread; 2246 int callchain_ret = 0; 2247 /* 2248 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2249 * this event's max_events having been hit and this is an entry coming 2250 * from the ring buffer that we should discard, since the max events 2251 * have already been considered/printed. 2252 */ 2253 if (evsel->disabled) 2254 return 0; 2255 2256 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2257 2258 if (sample->callchain) { 2259 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2260 if (callchain_ret == 0) { 2261 if (callchain_cursor.nr < trace->min_stack) 2262 goto out; 2263 callchain_ret = 1; 2264 } 2265 } 2266 2267 trace__printf_interrupted_entry(trace); 2268 trace__fprintf_tstamp(trace, sample->time, trace->output); 2269 2270 if (trace->trace_syscalls && trace->show_duration) 2271 fprintf(trace->output, "( ): "); 2272 2273 if (thread) 2274 trace__fprintf_comm_tid(trace, thread, trace->output); 2275 2276 if (evsel == trace->syscalls.events.augmented) { 2277 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2278 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2279 2280 if (sc) { 2281 fprintf(trace->output, "%s(", sc->name); 2282 trace__fprintf_sys_enter(trace, evsel, sample); 2283 fputc(')', trace->output); 2284 goto newline; 2285 } 2286 2287 /* 2288 * XXX: Not having the associated syscall info or not finding/adding 2289 * the thread should never happen, but if it does... 2290 * fall thru and print it as a bpf_output event. 2291 */ 2292 } 2293 2294 fprintf(trace->output, "%s:", evsel->name); 2295 2296 if (perf_evsel__is_bpf_output(evsel)) { 2297 bpf_output__fprintf(trace, sample); 2298 } else if (evsel->tp_format) { 2299 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2300 trace__fprintf_sys_enter(trace, evsel, sample)) { 2301 event_format__fprintf(evsel->tp_format, sample->cpu, 2302 sample->raw_data, sample->raw_size, 2303 trace->output); 2304 ++trace->nr_events_printed; 2305 2306 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2307 perf_evsel__disable(evsel); 2308 perf_evsel__close(evsel); 2309 } 2310 } 2311 } 2312 2313 newline: 2314 fprintf(trace->output, "\n"); 2315 2316 if (callchain_ret > 0) 2317 trace__fprintf_callchain(trace, sample); 2318 else if (callchain_ret < 0) 2319 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2320 out: 2321 thread__put(thread); 2322 return 0; 2323 } 2324 2325 static void print_location(FILE *f, struct perf_sample *sample, 2326 struct addr_location *al, 2327 bool print_dso, bool print_sym) 2328 { 2329 2330 if ((verbose > 0 || print_dso) && al->map) 2331 fprintf(f, "%s@", al->map->dso->long_name); 2332 2333 if ((verbose > 0 || print_sym) && al->sym) 2334 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2335 al->addr - al->sym->start); 2336 else if (al->map) 2337 fprintf(f, "0x%" PRIx64, al->addr); 2338 else 2339 fprintf(f, "0x%" PRIx64, sample->addr); 2340 } 2341 2342 static int trace__pgfault(struct trace *trace, 2343 struct perf_evsel *evsel, 2344 union perf_event *event __maybe_unused, 2345 struct perf_sample *sample) 2346 { 2347 struct thread *thread; 2348 struct addr_location al; 2349 char map_type = 'd'; 2350 struct thread_trace *ttrace; 2351 int err = -1; 2352 int callchain_ret = 0; 2353 2354 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2355 2356 if (sample->callchain) { 2357 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2358 if (callchain_ret == 0) { 2359 if (callchain_cursor.nr < trace->min_stack) 2360 goto out_put; 2361 callchain_ret = 1; 2362 } 2363 } 2364 2365 ttrace = thread__trace(thread, trace->output); 2366 if (ttrace == NULL) 2367 goto out_put; 2368 2369 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2370 ttrace->pfmaj++; 2371 else 2372 ttrace->pfmin++; 2373 2374 if (trace->summary_only) 2375 goto out; 2376 2377 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2378 2379 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2380 2381 fprintf(trace->output, "%sfault [", 2382 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2383 "maj" : "min"); 2384 2385 print_location(trace->output, sample, &al, false, true); 2386 2387 fprintf(trace->output, "] => "); 2388 2389 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2390 2391 if (!al.map) { 2392 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2393 2394 if (al.map) 2395 map_type = 'x'; 2396 else 2397 map_type = '?'; 2398 } 2399 2400 print_location(trace->output, sample, &al, true, false); 2401 2402 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2403 2404 if (callchain_ret > 0) 2405 trace__fprintf_callchain(trace, sample); 2406 else if (callchain_ret < 0) 2407 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2408 2409 ++trace->nr_events_printed; 2410 out: 2411 err = 0; 2412 out_put: 2413 thread__put(thread); 2414 return err; 2415 } 2416 2417 static void trace__set_base_time(struct trace *trace, 2418 struct perf_evsel *evsel, 2419 struct perf_sample *sample) 2420 { 2421 /* 2422 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2423 * and don't use sample->time unconditionally, we may end up having 2424 * some other event in the future without PERF_SAMPLE_TIME for good 2425 * reason, i.e. we may not be interested in its timestamps, just in 2426 * it taking place, picking some piece of information when it 2427 * appears in our event stream (vfs_getname comes to mind). 2428 */ 2429 if (trace->base_time == 0 && !trace->full_time && 2430 (evsel->attr.sample_type & PERF_SAMPLE_TIME)) 2431 trace->base_time = sample->time; 2432 } 2433 2434 static int trace__process_sample(struct perf_tool *tool, 2435 union perf_event *event, 2436 struct perf_sample *sample, 2437 struct perf_evsel *evsel, 2438 struct machine *machine __maybe_unused) 2439 { 2440 struct trace *trace = container_of(tool, struct trace, tool); 2441 struct thread *thread; 2442 int err = 0; 2443 2444 tracepoint_handler handler = evsel->handler; 2445 2446 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2447 if (thread && thread__is_filtered(thread)) 2448 goto out; 2449 2450 trace__set_base_time(trace, evsel, sample); 2451 2452 if (handler) { 2453 ++trace->nr_events; 2454 handler(trace, evsel, event, sample); 2455 } 2456 out: 2457 thread__put(thread); 2458 return err; 2459 } 2460 2461 static int trace__record(struct trace *trace, int argc, const char **argv) 2462 { 2463 unsigned int rec_argc, i, j; 2464 const char **rec_argv; 2465 const char * const record_args[] = { 2466 "record", 2467 "-R", 2468 "-m", "1024", 2469 "-c", "1", 2470 }; 2471 2472 const char * const sc_args[] = { "-e", }; 2473 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2474 const char * const majpf_args[] = { "-e", "major-faults" }; 2475 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2476 const char * const minpf_args[] = { "-e", "minor-faults" }; 2477 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2478 2479 /* +1 is for the event string below */ 2480 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2481 majpf_args_nr + minpf_args_nr + argc; 2482 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2483 2484 if (rec_argv == NULL) 2485 return -ENOMEM; 2486 2487 j = 0; 2488 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2489 rec_argv[j++] = record_args[i]; 2490 2491 if (trace->trace_syscalls) { 2492 for (i = 0; i < sc_args_nr; i++) 2493 rec_argv[j++] = sc_args[i]; 2494 2495 /* event string may be different for older kernels - e.g., RHEL6 */ 2496 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2497 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2498 else if (is_valid_tracepoint("syscalls:sys_enter")) 2499 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2500 else { 2501 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2502 free(rec_argv); 2503 return -1; 2504 } 2505 } 2506 2507 if (trace->trace_pgfaults & TRACE_PFMAJ) 2508 for (i = 0; i < majpf_args_nr; i++) 2509 rec_argv[j++] = majpf_args[i]; 2510 2511 if (trace->trace_pgfaults & TRACE_PFMIN) 2512 for (i = 0; i < minpf_args_nr; i++) 2513 rec_argv[j++] = minpf_args[i]; 2514 2515 for (i = 0; i < (unsigned int)argc; i++) 2516 rec_argv[j++] = argv[i]; 2517 2518 return cmd_record(j, rec_argv); 2519 } 2520 2521 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2522 2523 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) 2524 { 2525 bool found = false; 2526 struct perf_evsel *evsel, *tmp; 2527 struct parse_events_error err = { .idx = 0, }; 2528 int ret = parse_events(evlist, "probe:vfs_getname*", &err); 2529 2530 if (ret) 2531 return false; 2532 2533 evlist__for_each_entry_safe(evlist, evsel, tmp) { 2534 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname")) 2535 continue; 2536 2537 if (perf_evsel__field(evsel, "pathname")) { 2538 evsel->handler = trace__vfs_getname; 2539 found = true; 2540 continue; 2541 } 2542 2543 list_del_init(&evsel->node); 2544 evsel->evlist = NULL; 2545 perf_evsel__delete(evsel); 2546 } 2547 2548 return found; 2549 } 2550 2551 static struct perf_evsel *perf_evsel__new_pgfault(u64 config) 2552 { 2553 struct perf_evsel *evsel; 2554 struct perf_event_attr attr = { 2555 .type = PERF_TYPE_SOFTWARE, 2556 .mmap_data = 1, 2557 }; 2558 2559 attr.config = config; 2560 attr.sample_period = 1; 2561 2562 event_attr_init(&attr); 2563 2564 evsel = perf_evsel__new(&attr); 2565 if (evsel) 2566 evsel->handler = trace__pgfault; 2567 2568 return evsel; 2569 } 2570 2571 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2572 { 2573 const u32 type = event->header.type; 2574 struct perf_evsel *evsel; 2575 2576 if (type != PERF_RECORD_SAMPLE) { 2577 trace__process_event(trace, trace->host, event, sample); 2578 return; 2579 } 2580 2581 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2582 if (evsel == NULL) { 2583 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2584 return; 2585 } 2586 2587 trace__set_base_time(trace, evsel, sample); 2588 2589 if (evsel->attr.type == PERF_TYPE_TRACEPOINT && 2590 sample->raw_data == NULL) { 2591 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2592 perf_evsel__name(evsel), sample->tid, 2593 sample->cpu, sample->raw_size); 2594 } else { 2595 tracepoint_handler handler = evsel->handler; 2596 handler(trace, evsel, event, sample); 2597 } 2598 2599 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2600 interrupted = true; 2601 } 2602 2603 static int trace__add_syscall_newtp(struct trace *trace) 2604 { 2605 int ret = -1; 2606 struct perf_evlist *evlist = trace->evlist; 2607 struct perf_evsel *sys_enter, *sys_exit; 2608 2609 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2610 if (sys_enter == NULL) 2611 goto out; 2612 2613 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2614 goto out_delete_sys_enter; 2615 2616 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2617 if (sys_exit == NULL) 2618 goto out_delete_sys_enter; 2619 2620 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2621 goto out_delete_sys_exit; 2622 2623 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2624 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2625 2626 perf_evlist__add(evlist, sys_enter); 2627 perf_evlist__add(evlist, sys_exit); 2628 2629 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2630 /* 2631 * We're interested only in the user space callchain 2632 * leading to the syscall, allow overriding that for 2633 * debugging reasons using --kernel_syscall_callchains 2634 */ 2635 sys_exit->attr.exclude_callchain_kernel = 1; 2636 } 2637 2638 trace->syscalls.events.sys_enter = sys_enter; 2639 trace->syscalls.events.sys_exit = sys_exit; 2640 2641 ret = 0; 2642 out: 2643 return ret; 2644 2645 out_delete_sys_exit: 2646 perf_evsel__delete_priv(sys_exit); 2647 out_delete_sys_enter: 2648 perf_evsel__delete_priv(sys_enter); 2649 goto out; 2650 } 2651 2652 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2653 { 2654 int err = -1; 2655 struct perf_evsel *sys_exit; 2656 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2657 trace->ev_qualifier_ids.nr, 2658 trace->ev_qualifier_ids.entries); 2659 2660 if (filter == NULL) 2661 goto out_enomem; 2662 2663 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2664 filter)) { 2665 sys_exit = trace->syscalls.events.sys_exit; 2666 err = perf_evsel__append_tp_filter(sys_exit, filter); 2667 } 2668 2669 free(filter); 2670 out: 2671 return err; 2672 out_enomem: 2673 errno = ENOMEM; 2674 goto out; 2675 } 2676 2677 #ifdef HAVE_LIBBPF_SUPPORT 2678 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2679 { 2680 int fd = bpf_map__fd(trace->syscalls.map); 2681 struct bpf_map_syscall_entry value = { 2682 .enabled = !trace->not_ev_qualifier, 2683 }; 2684 int err = 0; 2685 size_t i; 2686 2687 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2688 int key = trace->ev_qualifier_ids.entries[i]; 2689 2690 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2691 if (err) 2692 break; 2693 } 2694 2695 return err; 2696 } 2697 2698 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2699 { 2700 int fd = bpf_map__fd(trace->syscalls.map); 2701 struct bpf_map_syscall_entry value = { 2702 .enabled = enabled, 2703 }; 2704 int err = 0, key; 2705 2706 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2707 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2708 if (err) 2709 break; 2710 } 2711 2712 return err; 2713 } 2714 2715 static int trace__init_syscalls_bpf_map(struct trace *trace) 2716 { 2717 bool enabled = true; 2718 2719 if (trace->ev_qualifier_ids.nr) 2720 enabled = trace->not_ev_qualifier; 2721 2722 return __trace__init_syscalls_bpf_map(trace, enabled); 2723 } 2724 #else 2725 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 2726 { 2727 return 0; 2728 } 2729 2730 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 2731 { 2732 return 0; 2733 } 2734 #endif // HAVE_LIBBPF_SUPPORT 2735 2736 static int trace__set_ev_qualifier_filter(struct trace *trace) 2737 { 2738 if (trace->syscalls.map) 2739 return trace__set_ev_qualifier_bpf_filter(trace); 2740 if (trace->syscalls.events.sys_enter) 2741 return trace__set_ev_qualifier_tp_filter(trace); 2742 return 0; 2743 } 2744 2745 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 2746 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 2747 { 2748 int err = 0; 2749 #ifdef HAVE_LIBBPF_SUPPORT 2750 bool value = true; 2751 int map_fd = bpf_map__fd(map); 2752 size_t i; 2753 2754 for (i = 0; i < npids; ++i) { 2755 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 2756 if (err) 2757 break; 2758 } 2759 #endif 2760 return err; 2761 } 2762 2763 static int trace__set_filter_loop_pids(struct trace *trace) 2764 { 2765 unsigned int nr = 1, err; 2766 pid_t pids[32] = { 2767 getpid(), 2768 }; 2769 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 2770 2771 while (thread && nr < ARRAY_SIZE(pids)) { 2772 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 2773 2774 if (parent == NULL) 2775 break; 2776 2777 if (!strcmp(thread__comm_str(parent), "sshd") || 2778 strstarts(thread__comm_str(parent), "gnome-terminal")) { 2779 pids[nr++] = parent->tid; 2780 break; 2781 } 2782 thread = parent; 2783 } 2784 2785 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 2786 if (!err && trace->filter_pids.map) 2787 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 2788 2789 return err; 2790 } 2791 2792 static int trace__set_filter_pids(struct trace *trace) 2793 { 2794 int err = 0; 2795 /* 2796 * Better not use !target__has_task() here because we need to cover the 2797 * case where no threads were specified in the command line, but a 2798 * workload was, and in that case we will fill in the thread_map when 2799 * we fork the workload in perf_evlist__prepare_workload. 2800 */ 2801 if (trace->filter_pids.nr > 0) { 2802 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 2803 trace->filter_pids.entries); 2804 if (!err && trace->filter_pids.map) { 2805 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 2806 trace->filter_pids.entries); 2807 } 2808 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { 2809 err = trace__set_filter_loop_pids(trace); 2810 } 2811 2812 return err; 2813 } 2814 2815 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 2816 { 2817 struct perf_evlist *evlist = trace->evlist; 2818 struct perf_sample sample; 2819 int err; 2820 2821 err = perf_evlist__parse_sample(evlist, event, &sample); 2822 if (err) 2823 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 2824 else 2825 trace__handle_event(trace, event, &sample); 2826 2827 return 0; 2828 } 2829 2830 static int __trace__flush_events(struct trace *trace) 2831 { 2832 u64 first = ordered_events__first_time(&trace->oe.data); 2833 u64 flush = trace->oe.last - NSEC_PER_SEC; 2834 2835 /* Is there some thing to flush.. */ 2836 if (first && first < flush) 2837 return ordered_events__flush_time(&trace->oe.data, flush); 2838 2839 return 0; 2840 } 2841 2842 static int trace__flush_events(struct trace *trace) 2843 { 2844 return !trace->sort_events ? 0 : __trace__flush_events(trace); 2845 } 2846 2847 static int trace__deliver_event(struct trace *trace, union perf_event *event) 2848 { 2849 int err; 2850 2851 if (!trace->sort_events) 2852 return __trace__deliver_event(trace, event); 2853 2854 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 2855 if (err && err != -1) 2856 return err; 2857 2858 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 2859 if (err) 2860 return err; 2861 2862 return trace__flush_events(trace); 2863 } 2864 2865 static int ordered_events__deliver_event(struct ordered_events *oe, 2866 struct ordered_event *event) 2867 { 2868 struct trace *trace = container_of(oe, struct trace, oe.data); 2869 2870 return __trace__deliver_event(trace, event->event); 2871 } 2872 2873 static int trace__run(struct trace *trace, int argc, const char **argv) 2874 { 2875 struct perf_evlist *evlist = trace->evlist; 2876 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 2877 int err = -1, i; 2878 unsigned long before; 2879 const bool forks = argc > 0; 2880 bool draining = false; 2881 2882 trace->live = true; 2883 2884 if (!trace->raw_augmented_syscalls) { 2885 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 2886 goto out_error_raw_syscalls; 2887 2888 if (trace->trace_syscalls) 2889 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist); 2890 } 2891 2892 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 2893 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 2894 if (pgfault_maj == NULL) 2895 goto out_error_mem; 2896 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 2897 perf_evlist__add(evlist, pgfault_maj); 2898 } 2899 2900 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 2901 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 2902 if (pgfault_min == NULL) 2903 goto out_error_mem; 2904 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 2905 perf_evlist__add(evlist, pgfault_min); 2906 } 2907 2908 if (trace->sched && 2909 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 2910 trace__sched_stat_runtime)) 2911 goto out_error_sched_stat_runtime; 2912 2913 /* 2914 * If a global cgroup was set, apply it to all the events without an 2915 * explicit cgroup. I.e.: 2916 * 2917 * trace -G A -e sched:*switch 2918 * 2919 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 2920 * _and_ sched:sched_switch to the 'A' cgroup, while: 2921 * 2922 * trace -e sched:*switch -G A 2923 * 2924 * will only set the sched:sched_switch event to the 'A' cgroup, all the 2925 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 2926 * a cgroup (on the root cgroup, sys wide, etc). 2927 * 2928 * Multiple cgroups: 2929 * 2930 * trace -G A -e sched:*switch -G B 2931 * 2932 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 2933 * to the 'B' cgroup. 2934 * 2935 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 2936 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 2937 */ 2938 if (trace->cgroup) 2939 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 2940 2941 err = perf_evlist__create_maps(evlist, &trace->opts.target); 2942 if (err < 0) { 2943 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 2944 goto out_delete_evlist; 2945 } 2946 2947 err = trace__symbols_init(trace, evlist); 2948 if (err < 0) { 2949 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 2950 goto out_delete_evlist; 2951 } 2952 2953 perf_evlist__config(evlist, &trace->opts, &callchain_param); 2954 2955 signal(SIGCHLD, sig_handler); 2956 signal(SIGINT, sig_handler); 2957 2958 if (forks) { 2959 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 2960 argv, false, NULL); 2961 if (err < 0) { 2962 fprintf(trace->output, "Couldn't run the workload!\n"); 2963 goto out_delete_evlist; 2964 } 2965 } 2966 2967 err = perf_evlist__open(evlist); 2968 if (err < 0) 2969 goto out_error_open; 2970 2971 err = bpf__apply_obj_config(); 2972 if (err) { 2973 char errbuf[BUFSIZ]; 2974 2975 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 2976 pr_err("ERROR: Apply config to BPF failed: %s\n", 2977 errbuf); 2978 goto out_error_open; 2979 } 2980 2981 err = trace__set_filter_pids(trace); 2982 if (err < 0) 2983 goto out_error_mem; 2984 2985 if (trace->syscalls.map) 2986 trace__init_syscalls_bpf_map(trace); 2987 2988 if (trace->ev_qualifier_ids.nr > 0) { 2989 err = trace__set_ev_qualifier_filter(trace); 2990 if (err < 0) 2991 goto out_errno; 2992 2993 if (trace->syscalls.events.sys_exit) { 2994 pr_debug("event qualifier tracepoint filter: %s\n", 2995 trace->syscalls.events.sys_exit->filter); 2996 } 2997 } 2998 2999 err = perf_evlist__apply_filters(evlist, &evsel); 3000 if (err < 0) 3001 goto out_error_apply_filters; 3002 3003 if (trace->dump.map) 3004 bpf_map__fprintf(trace->dump.map, trace->output); 3005 3006 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); 3007 if (err < 0) 3008 goto out_error_mmap; 3009 3010 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3011 perf_evlist__enable(evlist); 3012 3013 if (forks) 3014 perf_evlist__start_workload(evlist); 3015 3016 if (trace->opts.initial_delay) { 3017 usleep(trace->opts.initial_delay * 1000); 3018 perf_evlist__enable(evlist); 3019 } 3020 3021 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || 3022 evlist->threads->nr > 1 || 3023 perf_evlist__first(evlist)->attr.inherit; 3024 3025 /* 3026 * Now that we already used evsel->attr to ask the kernel to setup the 3027 * events, lets reuse evsel->attr.sample_max_stack as the limit in 3028 * trace__resolve_callchain(), allowing per-event max-stack settings 3029 * to override an explicitly set --max-stack global setting. 3030 */ 3031 evlist__for_each_entry(evlist, evsel) { 3032 if (evsel__has_callchain(evsel) && 3033 evsel->attr.sample_max_stack == 0) 3034 evsel->attr.sample_max_stack = trace->max_stack; 3035 } 3036 again: 3037 before = trace->nr_events; 3038 3039 for (i = 0; i < evlist->nr_mmaps; i++) { 3040 union perf_event *event; 3041 struct perf_mmap *md; 3042 3043 md = &evlist->mmap[i]; 3044 if (perf_mmap__read_init(md) < 0) 3045 continue; 3046 3047 while ((event = perf_mmap__read_event(md)) != NULL) { 3048 ++trace->nr_events; 3049 3050 err = trace__deliver_event(trace, event); 3051 if (err) 3052 goto out_disable; 3053 3054 perf_mmap__consume(md); 3055 3056 if (interrupted) 3057 goto out_disable; 3058 3059 if (done && !draining) { 3060 perf_evlist__disable(evlist); 3061 draining = true; 3062 } 3063 } 3064 perf_mmap__read_done(md); 3065 } 3066 3067 if (trace->nr_events == before) { 3068 int timeout = done ? 100 : -1; 3069 3070 if (!draining && perf_evlist__poll(evlist, timeout) > 0) { 3071 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3072 draining = true; 3073 3074 goto again; 3075 } else { 3076 if (trace__flush_events(trace)) 3077 goto out_disable; 3078 } 3079 } else { 3080 goto again; 3081 } 3082 3083 out_disable: 3084 thread__zput(trace->current); 3085 3086 perf_evlist__disable(evlist); 3087 3088 if (trace->sort_events) 3089 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3090 3091 if (!err) { 3092 if (trace->summary) 3093 trace__fprintf_thread_summary(trace, trace->output); 3094 3095 if (trace->show_tool_stats) { 3096 fprintf(trace->output, "Stats:\n " 3097 " vfs_getname : %" PRIu64 "\n" 3098 " proc_getname: %" PRIu64 "\n", 3099 trace->stats.vfs_getname, 3100 trace->stats.proc_getname); 3101 } 3102 } 3103 3104 out_delete_evlist: 3105 trace__symbols__exit(trace); 3106 3107 perf_evlist__delete(evlist); 3108 cgroup__put(trace->cgroup); 3109 trace->evlist = NULL; 3110 trace->live = false; 3111 return err; 3112 { 3113 char errbuf[BUFSIZ]; 3114 3115 out_error_sched_stat_runtime: 3116 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3117 goto out_error; 3118 3119 out_error_raw_syscalls: 3120 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3121 goto out_error; 3122 3123 out_error_mmap: 3124 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3125 goto out_error; 3126 3127 out_error_open: 3128 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3129 3130 out_error: 3131 fprintf(trace->output, "%s\n", errbuf); 3132 goto out_delete_evlist; 3133 3134 out_error_apply_filters: 3135 fprintf(trace->output, 3136 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3137 evsel->filter, perf_evsel__name(evsel), errno, 3138 str_error_r(errno, errbuf, sizeof(errbuf))); 3139 goto out_delete_evlist; 3140 } 3141 out_error_mem: 3142 fprintf(trace->output, "Not enough memory to run!\n"); 3143 goto out_delete_evlist; 3144 3145 out_errno: 3146 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3147 goto out_delete_evlist; 3148 } 3149 3150 static int trace__replay(struct trace *trace) 3151 { 3152 const struct perf_evsel_str_handler handlers[] = { 3153 { "probe:vfs_getname", trace__vfs_getname, }, 3154 }; 3155 struct perf_data data = { 3156 .path = input_name, 3157 .mode = PERF_DATA_MODE_READ, 3158 .force = trace->force, 3159 }; 3160 struct perf_session *session; 3161 struct perf_evsel *evsel; 3162 int err = -1; 3163 3164 trace->tool.sample = trace__process_sample; 3165 trace->tool.mmap = perf_event__process_mmap; 3166 trace->tool.mmap2 = perf_event__process_mmap2; 3167 trace->tool.comm = perf_event__process_comm; 3168 trace->tool.exit = perf_event__process_exit; 3169 trace->tool.fork = perf_event__process_fork; 3170 trace->tool.attr = perf_event__process_attr; 3171 trace->tool.tracing_data = perf_event__process_tracing_data; 3172 trace->tool.build_id = perf_event__process_build_id; 3173 trace->tool.namespaces = perf_event__process_namespaces; 3174 3175 trace->tool.ordered_events = true; 3176 trace->tool.ordering_requires_timestamps = true; 3177 3178 /* add tid to output */ 3179 trace->multiple_threads = true; 3180 3181 session = perf_session__new(&data, false, &trace->tool); 3182 if (session == NULL) 3183 return -1; 3184 3185 if (trace->opts.target.pid) 3186 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3187 3188 if (trace->opts.target.tid) 3189 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3190 3191 if (symbol__init(&session->header.env) < 0) 3192 goto out; 3193 3194 trace->host = &session->machines.host; 3195 3196 err = perf_session__set_tracepoints_handlers(session, handlers); 3197 if (err) 3198 goto out; 3199 3200 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3201 "raw_syscalls:sys_enter"); 3202 /* older kernels have syscalls tp versus raw_syscalls */ 3203 if (evsel == NULL) 3204 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3205 "syscalls:sys_enter"); 3206 3207 if (evsel && 3208 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3209 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3210 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3211 goto out; 3212 } 3213 3214 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3215 "raw_syscalls:sys_exit"); 3216 if (evsel == NULL) 3217 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3218 "syscalls:sys_exit"); 3219 if (evsel && 3220 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3221 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3222 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3223 goto out; 3224 } 3225 3226 evlist__for_each_entry(session->evlist, evsel) { 3227 if (evsel->attr.type == PERF_TYPE_SOFTWARE && 3228 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3229 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3230 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3231 evsel->handler = trace__pgfault; 3232 } 3233 3234 setup_pager(); 3235 3236 err = perf_session__process_events(session); 3237 if (err) 3238 pr_err("Failed to process events, error %d", err); 3239 3240 else if (trace->summary) 3241 trace__fprintf_thread_summary(trace, trace->output); 3242 3243 out: 3244 perf_session__delete(session); 3245 3246 return err; 3247 } 3248 3249 static size_t trace__fprintf_threads_header(FILE *fp) 3250 { 3251 size_t printed; 3252 3253 printed = fprintf(fp, "\n Summary of events:\n\n"); 3254 3255 return printed; 3256 } 3257 3258 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3259 struct stats *stats; 3260 double msecs; 3261 int syscall; 3262 ) 3263 { 3264 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3265 struct stats *stats = source->priv; 3266 3267 entry->syscall = source->i; 3268 entry->stats = stats; 3269 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3270 } 3271 3272 static size_t thread__dump_stats(struct thread_trace *ttrace, 3273 struct trace *trace, FILE *fp) 3274 { 3275 size_t printed = 0; 3276 struct syscall *sc; 3277 struct rb_node *nd; 3278 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3279 3280 if (syscall_stats == NULL) 3281 return 0; 3282 3283 printed += fprintf(fp, "\n"); 3284 3285 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3286 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3287 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3288 3289 resort_rb__for_each_entry(nd, syscall_stats) { 3290 struct stats *stats = syscall_stats_entry->stats; 3291 if (stats) { 3292 double min = (double)(stats->min) / NSEC_PER_MSEC; 3293 double max = (double)(stats->max) / NSEC_PER_MSEC; 3294 double avg = avg_stats(stats); 3295 double pct; 3296 u64 n = (u64) stats->n; 3297 3298 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3299 avg /= NSEC_PER_MSEC; 3300 3301 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3302 printed += fprintf(fp, " %-15s", sc->name); 3303 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3304 n, syscall_stats_entry->msecs, min, avg); 3305 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3306 } 3307 } 3308 3309 resort_rb__delete(syscall_stats); 3310 printed += fprintf(fp, "\n\n"); 3311 3312 return printed; 3313 } 3314 3315 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3316 { 3317 size_t printed = 0; 3318 struct thread_trace *ttrace = thread__priv(thread); 3319 double ratio; 3320 3321 if (ttrace == NULL) 3322 return 0; 3323 3324 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3325 3326 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3327 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3328 printed += fprintf(fp, "%.1f%%", ratio); 3329 if (ttrace->pfmaj) 3330 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3331 if (ttrace->pfmin) 3332 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3333 if (trace->sched) 3334 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3335 else if (fputc('\n', fp) != EOF) 3336 ++printed; 3337 3338 printed += thread__dump_stats(ttrace, trace, fp); 3339 3340 return printed; 3341 } 3342 3343 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3344 { 3345 return ttrace ? ttrace->nr_events : 0; 3346 } 3347 3348 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3349 struct thread *thread; 3350 ) 3351 { 3352 entry->thread = rb_entry(nd, struct thread, rb_node); 3353 } 3354 3355 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3356 { 3357 size_t printed = trace__fprintf_threads_header(fp); 3358 struct rb_node *nd; 3359 int i; 3360 3361 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3362 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3363 3364 if (threads == NULL) { 3365 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3366 return 0; 3367 } 3368 3369 resort_rb__for_each_entry(nd, threads) 3370 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3371 3372 resort_rb__delete(threads); 3373 } 3374 return printed; 3375 } 3376 3377 static int trace__set_duration(const struct option *opt, const char *str, 3378 int unset __maybe_unused) 3379 { 3380 struct trace *trace = opt->value; 3381 3382 trace->duration_filter = atof(str); 3383 return 0; 3384 } 3385 3386 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3387 int unset __maybe_unused) 3388 { 3389 int ret = -1; 3390 size_t i; 3391 struct trace *trace = opt->value; 3392 /* 3393 * FIXME: introduce a intarray class, plain parse csv and create a 3394 * { int nr, int entries[] } struct... 3395 */ 3396 struct intlist *list = intlist__new(str); 3397 3398 if (list == NULL) 3399 return -1; 3400 3401 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3402 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3403 3404 if (trace->filter_pids.entries == NULL) 3405 goto out; 3406 3407 trace->filter_pids.entries[0] = getpid(); 3408 3409 for (i = 1; i < trace->filter_pids.nr; ++i) 3410 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3411 3412 intlist__delete(list); 3413 ret = 0; 3414 out: 3415 return ret; 3416 } 3417 3418 static int trace__open_output(struct trace *trace, const char *filename) 3419 { 3420 struct stat st; 3421 3422 if (!stat(filename, &st) && st.st_size) { 3423 char oldname[PATH_MAX]; 3424 3425 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3426 unlink(oldname); 3427 rename(filename, oldname); 3428 } 3429 3430 trace->output = fopen(filename, "w"); 3431 3432 return trace->output == NULL ? -errno : 0; 3433 } 3434 3435 static int parse_pagefaults(const struct option *opt, const char *str, 3436 int unset __maybe_unused) 3437 { 3438 int *trace_pgfaults = opt->value; 3439 3440 if (strcmp(str, "all") == 0) 3441 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3442 else if (strcmp(str, "maj") == 0) 3443 *trace_pgfaults |= TRACE_PFMAJ; 3444 else if (strcmp(str, "min") == 0) 3445 *trace_pgfaults |= TRACE_PFMIN; 3446 else 3447 return -1; 3448 3449 return 0; 3450 } 3451 3452 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) 3453 { 3454 struct perf_evsel *evsel; 3455 3456 evlist__for_each_entry(evlist, evsel) 3457 evsel->handler = handler; 3458 } 3459 3460 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) 3461 { 3462 struct perf_evsel *evsel; 3463 3464 evlist__for_each_entry(evlist, evsel) { 3465 if (evsel->priv || !evsel->tp_format) 3466 continue; 3467 3468 if (strcmp(evsel->tp_format->system, "syscalls")) 3469 continue; 3470 3471 if (perf_evsel__init_syscall_tp(evsel)) 3472 return -1; 3473 3474 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3475 struct syscall_tp *sc = evsel->priv; 3476 3477 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3478 return -1; 3479 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3480 struct syscall_tp *sc = evsel->priv; 3481 3482 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3483 return -1; 3484 } 3485 } 3486 3487 return 0; 3488 } 3489 3490 /* 3491 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3492 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3493 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3494 * 3495 * It'd be better to introduce a parse_options() variant that would return a 3496 * list with the terms it didn't match to an event... 3497 */ 3498 static int trace__parse_events_option(const struct option *opt, const char *str, 3499 int unset __maybe_unused) 3500 { 3501 struct trace *trace = (struct trace *)opt->value; 3502 const char *s = str; 3503 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3504 int len = strlen(str) + 1, err = -1, list, idx; 3505 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3506 char group_name[PATH_MAX]; 3507 struct syscall_fmt *fmt; 3508 3509 if (strace_groups_dir == NULL) 3510 return -1; 3511 3512 if (*s == '!') { 3513 ++s; 3514 trace->not_ev_qualifier = true; 3515 } 3516 3517 while (1) { 3518 if ((sep = strchr(s, ',')) != NULL) 3519 *sep = '\0'; 3520 3521 list = 0; 3522 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3523 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3524 list = 1; 3525 goto do_concat; 3526 } 3527 3528 fmt = syscall_fmt__find_by_alias(s); 3529 if (fmt != NULL) { 3530 list = 1; 3531 s = fmt->name; 3532 } else { 3533 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3534 if (access(group_name, R_OK) == 0) 3535 list = 1; 3536 } 3537 do_concat: 3538 if (lists[list]) { 3539 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3540 } else { 3541 lists[list] = malloc(len); 3542 if (lists[list] == NULL) 3543 goto out; 3544 strcpy(lists[list], s); 3545 } 3546 3547 if (!sep) 3548 break; 3549 3550 *sep = ','; 3551 s = sep + 1; 3552 } 3553 3554 if (lists[1] != NULL) { 3555 struct strlist_config slist_config = { 3556 .dirname = strace_groups_dir, 3557 }; 3558 3559 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3560 if (trace->ev_qualifier == NULL) { 3561 fputs("Not enough memory to parse event qualifier", trace->output); 3562 goto out; 3563 } 3564 3565 if (trace__validate_ev_qualifier(trace)) 3566 goto out; 3567 trace->trace_syscalls = true; 3568 } 3569 3570 err = 0; 3571 3572 if (lists[0]) { 3573 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3574 "event selector. use 'perf list' to list available events", 3575 parse_events_option); 3576 err = parse_events_option(&o, lists[0], 0); 3577 } 3578 out: 3579 if (sep) 3580 *sep = ','; 3581 3582 return err; 3583 } 3584 3585 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3586 { 3587 struct trace *trace = opt->value; 3588 3589 if (!list_empty(&trace->evlist->entries)) 3590 return parse_cgroups(opt, str, unset); 3591 3592 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 3593 3594 return 0; 3595 } 3596 3597 static struct bpf_map *bpf__find_map_by_name(const char *name) 3598 { 3599 struct bpf_object *obj, *tmp; 3600 3601 bpf_object__for_each_safe(obj, tmp) { 3602 struct bpf_map *map = bpf_object__find_map_by_name(obj, name); 3603 if (map) 3604 return map; 3605 3606 } 3607 3608 return NULL; 3609 } 3610 3611 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3612 { 3613 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); 3614 } 3615 3616 static void trace__set_bpf_map_syscalls(struct trace *trace) 3617 { 3618 trace->syscalls.map = bpf__find_map_by_name("syscalls"); 3619 } 3620 3621 static int trace__config(const char *var, const char *value, void *arg) 3622 { 3623 struct trace *trace = arg; 3624 int err = 0; 3625 3626 if (!strcmp(var, "trace.add_events")) { 3627 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3628 "event selector. use 'perf list' to list available events", 3629 parse_events_option); 3630 err = parse_events_option(&o, value, 0); 3631 } else if (!strcmp(var, "trace.show_timestamp")) { 3632 trace->show_tstamp = perf_config_bool(var, value); 3633 } else if (!strcmp(var, "trace.show_duration")) { 3634 trace->show_duration = perf_config_bool(var, value); 3635 } else if (!strcmp(var, "trace.show_arg_names")) { 3636 trace->show_arg_names = perf_config_bool(var, value); 3637 if (!trace->show_arg_names) 3638 trace->show_zeros = true; 3639 } else if (!strcmp(var, "trace.show_zeros")) { 3640 bool new_show_zeros = perf_config_bool(var, value); 3641 if (!trace->show_arg_names && !new_show_zeros) { 3642 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 3643 goto out; 3644 } 3645 trace->show_zeros = new_show_zeros; 3646 } else if (!strcmp(var, "trace.show_prefix")) { 3647 trace->show_string_prefix = perf_config_bool(var, value); 3648 } else if (!strcmp(var, "trace.no_inherit")) { 3649 trace->opts.no_inherit = perf_config_bool(var, value); 3650 } else if (!strcmp(var, "trace.args_alignment")) { 3651 int args_alignment = 0; 3652 if (perf_config_int(&args_alignment, var, value) == 0) 3653 trace->args_alignment = args_alignment; 3654 } 3655 out: 3656 return err; 3657 } 3658 3659 int cmd_trace(int argc, const char **argv) 3660 { 3661 const char *trace_usage[] = { 3662 "perf trace [<options>] [<command>]", 3663 "perf trace [<options>] -- <command> [<options>]", 3664 "perf trace record [<options>] [<command>]", 3665 "perf trace record [<options>] -- <command> [<options>]", 3666 NULL 3667 }; 3668 struct trace trace = { 3669 .syscalls = { 3670 . max = -1, 3671 }, 3672 .opts = { 3673 .target = { 3674 .uid = UINT_MAX, 3675 .uses_mmap = true, 3676 }, 3677 .user_freq = UINT_MAX, 3678 .user_interval = ULLONG_MAX, 3679 .no_buffering = true, 3680 .mmap_pages = UINT_MAX, 3681 }, 3682 .output = stderr, 3683 .show_comm = true, 3684 .show_tstamp = true, 3685 .show_duration = true, 3686 .show_arg_names = true, 3687 .args_alignment = 70, 3688 .trace_syscalls = false, 3689 .kernel_syscallchains = false, 3690 .max_stack = UINT_MAX, 3691 .max_events = ULONG_MAX, 3692 }; 3693 const char *map_dump_str = NULL; 3694 const char *output_name = NULL; 3695 const struct option trace_options[] = { 3696 OPT_CALLBACK('e', "event", &trace, "event", 3697 "event/syscall selector. use 'perf list' to list available events", 3698 trace__parse_events_option), 3699 OPT_BOOLEAN(0, "comm", &trace.show_comm, 3700 "show the thread COMM next to its id"), 3701 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 3702 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 3703 trace__parse_events_option), 3704 OPT_STRING('o', "output", &output_name, "file", "output file name"), 3705 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 3706 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 3707 "trace events on existing process id"), 3708 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 3709 "trace events on existing thread id"), 3710 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 3711 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 3712 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 3713 "system-wide collection from all CPUs"), 3714 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 3715 "list of cpus to monitor"), 3716 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 3717 "child tasks do not inherit counters"), 3718 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 3719 "number of mmap data pages", 3720 perf_evlist__parse_mmap_pages), 3721 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 3722 "user to profile"), 3723 OPT_CALLBACK(0, "duration", &trace, "float", 3724 "show only events with duration > N.M ms", 3725 trace__set_duration), 3726 #ifdef HAVE_LIBBPF_SUPPORT 3727 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 3728 #endif 3729 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 3730 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 3731 OPT_BOOLEAN('T', "time", &trace.full_time, 3732 "Show full timestamp, not time relative to first start"), 3733 OPT_BOOLEAN(0, "failure", &trace.failure_only, 3734 "Show only syscalls that failed"), 3735 OPT_BOOLEAN('s', "summary", &trace.summary_only, 3736 "Show only syscall summary with statistics"), 3737 OPT_BOOLEAN('S', "with-summary", &trace.summary, 3738 "Show all syscalls and summary with statistics"), 3739 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 3740 "Trace pagefaults", parse_pagefaults, "maj"), 3741 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 3742 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 3743 OPT_CALLBACK(0, "call-graph", &trace.opts, 3744 "record_mode[,record_size]", record_callchain_help, 3745 &record_parse_callchain_opt), 3746 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 3747 "Show the kernel callchains on the syscall exit path"), 3748 OPT_ULONG(0, "max-events", &trace.max_events, 3749 "Set the maximum number of events to print, exit after that is reached. "), 3750 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 3751 "Set the minimum stack depth when parsing the callchain, " 3752 "anything below the specified depth will be ignored."), 3753 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 3754 "Set the maximum stack depth when parsing the callchain, " 3755 "anything beyond the specified depth will be ignored. " 3756 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 3757 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 3758 "Sort batch of events before processing, use if getting out of order events"), 3759 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 3760 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 3761 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 3762 "per thread proc mmap processing timeout in ms"), 3763 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 3764 trace__parse_cgroups), 3765 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 3766 "ms to wait before starting measurement after program " 3767 "start"), 3768 OPT_END() 3769 }; 3770 bool __maybe_unused max_stack_user_set = true; 3771 bool mmap_pages_user_set = true; 3772 struct perf_evsel *evsel; 3773 const char * const trace_subcommands[] = { "record", NULL }; 3774 int err = -1; 3775 char bf[BUFSIZ]; 3776 3777 signal(SIGSEGV, sighandler_dump_stack); 3778 signal(SIGFPE, sighandler_dump_stack); 3779 3780 trace.evlist = perf_evlist__new(); 3781 trace.sctbl = syscalltbl__new(); 3782 3783 if (trace.evlist == NULL || trace.sctbl == NULL) { 3784 pr_err("Not enough memory to run!\n"); 3785 err = -ENOMEM; 3786 goto out; 3787 } 3788 3789 err = perf_config(trace__config, &trace); 3790 if (err) 3791 goto out; 3792 3793 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 3794 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 3795 3796 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 3797 usage_with_options_msg(trace_usage, trace_options, 3798 "cgroup monitoring only available in system-wide mode"); 3799 } 3800 3801 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 3802 if (IS_ERR(evsel)) { 3803 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 3804 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 3805 goto out; 3806 } 3807 3808 if (evsel) { 3809 trace.syscalls.events.augmented = evsel; 3810 trace__set_bpf_map_filtered_pids(&trace); 3811 trace__set_bpf_map_syscalls(&trace); 3812 } 3813 3814 err = bpf__setup_stdout(trace.evlist); 3815 if (err) { 3816 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 3817 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 3818 goto out; 3819 } 3820 3821 err = -1; 3822 3823 if (map_dump_str) { 3824 trace.dump.map = bpf__find_map_by_name(map_dump_str); 3825 if (trace.dump.map == NULL) { 3826 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 3827 goto out; 3828 } 3829 } 3830 3831 if (trace.trace_pgfaults) { 3832 trace.opts.sample_address = true; 3833 trace.opts.sample_time = true; 3834 } 3835 3836 if (trace.opts.mmap_pages == UINT_MAX) 3837 mmap_pages_user_set = false; 3838 3839 if (trace.max_stack == UINT_MAX) { 3840 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 3841 max_stack_user_set = false; 3842 } 3843 3844 #ifdef HAVE_DWARF_UNWIND_SUPPORT 3845 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 3846 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 3847 } 3848 #endif 3849 3850 if (callchain_param.enabled) { 3851 if (!mmap_pages_user_set && geteuid() == 0) 3852 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 3853 3854 symbol_conf.use_callchain = true; 3855 } 3856 3857 if (trace.evlist->nr_entries > 0) { 3858 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 3859 if (evlist__set_syscall_tp_fields(trace.evlist)) { 3860 perror("failed to set syscalls:* tracepoint fields"); 3861 goto out; 3862 } 3863 } 3864 3865 if (trace.sort_events) { 3866 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 3867 ordered_events__set_copy_on_queue(&trace.oe.data, true); 3868 } 3869 3870 /* 3871 * If we are augmenting syscalls, then combine what we put in the 3872 * __augmented_syscalls__ BPF map with what is in the 3873 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 3874 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 3875 * 3876 * We'll switch to look at two BPF maps, one for sys_enter and the 3877 * other for sys_exit when we start augmenting the sys_exit paths with 3878 * buffers that are being copied from kernel to userspace, think 'read' 3879 * syscall. 3880 */ 3881 if (trace.syscalls.events.augmented) { 3882 evlist__for_each_entry(trace.evlist, evsel) { 3883 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 3884 3885 if (raw_syscalls_sys_exit) { 3886 trace.raw_augmented_syscalls = true; 3887 goto init_augmented_syscall_tp; 3888 } 3889 3890 if (trace.syscalls.events.augmented->priv == NULL && 3891 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) { 3892 struct perf_evsel *augmented = trace.syscalls.events.augmented; 3893 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 3894 perf_evsel__init_augmented_syscall_tp_args(augmented)) 3895 goto out; 3896 augmented->handler = trace__sys_enter; 3897 } 3898 3899 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 3900 struct syscall_tp *sc; 3901 init_augmented_syscall_tp: 3902 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 3903 goto out; 3904 sc = evsel->priv; 3905 /* 3906 * For now with BPF raw_augmented we hook into 3907 * raw_syscalls:sys_enter and there we get all 3908 * 6 syscall args plus the tracepoint common 3909 * fields and the syscall_nr (another long). 3910 * So we check if that is the case and if so 3911 * don't look after the sc->args_size but 3912 * always after the full raw_syscalls:sys_enter 3913 * payload, which is fixed. 3914 * 3915 * We'll revisit this later to pass 3916 * s->args_size to the BPF augmenter (now 3917 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 3918 * so that it copies only what we need for each 3919 * syscall, like what happens when we use 3920 * syscalls:sys_enter_NAME, so that we reduce 3921 * the kernel/userspace traffic to just what is 3922 * needed for each syscall. 3923 */ 3924 if (trace.raw_augmented_syscalls) 3925 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 3926 perf_evsel__init_augmented_syscall_tp_ret(evsel); 3927 evsel->handler = trace__sys_exit; 3928 } 3929 } 3930 } 3931 3932 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 3933 return trace__record(&trace, argc-1, &argv[1]); 3934 3935 /* summary_only implies summary option, but don't overwrite summary if set */ 3936 if (trace.summary_only) 3937 trace.summary = trace.summary_only; 3938 3939 if (!trace.trace_syscalls && !trace.trace_pgfaults && 3940 trace.evlist->nr_entries == 0 /* Was --events used? */) { 3941 trace.trace_syscalls = true; 3942 } 3943 3944 if (output_name != NULL) { 3945 err = trace__open_output(&trace, output_name); 3946 if (err < 0) { 3947 perror("failed to create output file"); 3948 goto out; 3949 } 3950 } 3951 3952 err = target__validate(&trace.opts.target); 3953 if (err) { 3954 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3955 fprintf(trace.output, "%s", bf); 3956 goto out_close; 3957 } 3958 3959 err = target__parse_uid(&trace.opts.target); 3960 if (err) { 3961 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3962 fprintf(trace.output, "%s", bf); 3963 goto out_close; 3964 } 3965 3966 if (!argc && target__none(&trace.opts.target)) 3967 trace.opts.target.system_wide = true; 3968 3969 if (input_name) 3970 err = trace__replay(&trace); 3971 else 3972 err = trace__run(&trace, argc, argv); 3973 3974 out_close: 3975 if (output_name != NULL) 3976 fclose(trace.output); 3977 out: 3978 return err; 3979 } 3980