1 /* 2 * builtin-trace.c 3 * 4 * Builtin 'trace' command: 5 * 6 * Display a continuously updated trace of any workload, CPU, specific PID, 7 * system wide, etc. Default format is loosely strace like, but any other 8 * event may be specified using --event. 9 * 10 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 11 * 12 * Initially based on the 'trace' prototype by Thomas Gleixner: 13 * 14 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 15 * 16 * Released under the GPL v2. (and only v2, not any later version) 17 */ 18 19 #include <traceevent/event-parse.h> 20 #include <api/fs/tracing_path.h> 21 #include <bpf/bpf.h> 22 #include "util/bpf_map.h" 23 #include "builtin.h" 24 #include "util/cgroup.h" 25 #include "util/color.h" 26 #include "util/config.h" 27 #include "util/debug.h" 28 #include "util/env.h" 29 #include "util/event.h" 30 #include "util/evlist.h" 31 #include <subcmd/exec-cmd.h> 32 #include "util/machine.h" 33 #include "util/map.h" 34 #include "util/symbol.h" 35 #include "util/path.h" 36 #include "util/session.h" 37 #include "util/thread.h" 38 #include <subcmd/parse-options.h> 39 #include "util/strlist.h" 40 #include "util/intlist.h" 41 #include "util/thread_map.h" 42 #include "util/stat.h" 43 #include "trace/beauty/beauty.h" 44 #include "trace-event.h" 45 #include "util/parse-events.h" 46 #include "util/bpf-loader.h" 47 #include "callchain.h" 48 #include "print_binary.h" 49 #include "string2.h" 50 #include "syscalltbl.h" 51 #include "rb_resort.h" 52 53 #include <errno.h> 54 #include <inttypes.h> 55 #include <poll.h> 56 #include <signal.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <linux/err.h> 60 #include <linux/filter.h> 61 #include <linux/kernel.h> 62 #include <linux/random.h> 63 #include <linux/stringify.h> 64 #include <linux/time64.h> 65 #include <fcntl.h> 66 #include <sys/sysmacros.h> 67 68 #include "sane_ctype.h" 69 70 #ifndef O_CLOEXEC 71 # define O_CLOEXEC 02000000 72 #endif 73 74 #ifndef F_LINUX_SPECIFIC_BASE 75 # define F_LINUX_SPECIFIC_BASE 1024 76 #endif 77 78 struct trace { 79 struct perf_tool tool; 80 struct syscalltbl *sctbl; 81 struct { 82 int max; 83 struct syscall *table; 84 struct bpf_map *map; 85 struct { 86 struct perf_evsel *sys_enter, 87 *sys_exit, 88 *augmented; 89 } events; 90 } syscalls; 91 struct { 92 struct bpf_map *map; 93 } dump; 94 struct record_opts opts; 95 struct perf_evlist *evlist; 96 struct machine *host; 97 struct thread *current; 98 struct cgroup *cgroup; 99 u64 base_time; 100 FILE *output; 101 unsigned long nr_events; 102 unsigned long nr_events_printed; 103 unsigned long max_events; 104 struct strlist *ev_qualifier; 105 struct { 106 size_t nr; 107 int *entries; 108 } ev_qualifier_ids; 109 struct { 110 size_t nr; 111 pid_t *entries; 112 struct bpf_map *map; 113 } filter_pids; 114 double duration_filter; 115 double runtime_ms; 116 struct { 117 u64 vfs_getname, 118 proc_getname; 119 } stats; 120 unsigned int max_stack; 121 unsigned int min_stack; 122 int raw_augmented_syscalls_args_size; 123 bool raw_augmented_syscalls; 124 bool sort_events; 125 bool not_ev_qualifier; 126 bool live; 127 bool full_time; 128 bool sched; 129 bool multiple_threads; 130 bool summary; 131 bool summary_only; 132 bool failure_only; 133 bool show_comm; 134 bool print_sample; 135 bool show_tool_stats; 136 bool trace_syscalls; 137 bool kernel_syscallchains; 138 s16 args_alignment; 139 bool show_tstamp; 140 bool show_duration; 141 bool show_zeros; 142 bool show_arg_names; 143 bool show_string_prefix; 144 bool force; 145 bool vfs_getname; 146 int trace_pgfaults; 147 struct { 148 struct ordered_events data; 149 u64 last; 150 } oe; 151 }; 152 153 struct tp_field { 154 int offset; 155 union { 156 u64 (*integer)(struct tp_field *field, struct perf_sample *sample); 157 void *(*pointer)(struct tp_field *field, struct perf_sample *sample); 158 }; 159 }; 160 161 #define TP_UINT_FIELD(bits) \ 162 static u64 tp_field__u##bits(struct tp_field *field, struct perf_sample *sample) \ 163 { \ 164 u##bits value; \ 165 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 166 return value; \ 167 } 168 169 TP_UINT_FIELD(8); 170 TP_UINT_FIELD(16); 171 TP_UINT_FIELD(32); 172 TP_UINT_FIELD(64); 173 174 #define TP_UINT_FIELD__SWAPPED(bits) \ 175 static u64 tp_field__swapped_u##bits(struct tp_field *field, struct perf_sample *sample) \ 176 { \ 177 u##bits value; \ 178 memcpy(&value, sample->raw_data + field->offset, sizeof(value)); \ 179 return bswap_##bits(value);\ 180 } 181 182 TP_UINT_FIELD__SWAPPED(16); 183 TP_UINT_FIELD__SWAPPED(32); 184 TP_UINT_FIELD__SWAPPED(64); 185 186 static int __tp_field__init_uint(struct tp_field *field, int size, int offset, bool needs_swap) 187 { 188 field->offset = offset; 189 190 switch (size) { 191 case 1: 192 field->integer = tp_field__u8; 193 break; 194 case 2: 195 field->integer = needs_swap ? tp_field__swapped_u16 : tp_field__u16; 196 break; 197 case 4: 198 field->integer = needs_swap ? tp_field__swapped_u32 : tp_field__u32; 199 break; 200 case 8: 201 field->integer = needs_swap ? tp_field__swapped_u64 : tp_field__u64; 202 break; 203 default: 204 return -1; 205 } 206 207 return 0; 208 } 209 210 static int tp_field__init_uint(struct tp_field *field, struct tep_format_field *format_field, bool needs_swap) 211 { 212 return __tp_field__init_uint(field, format_field->size, format_field->offset, needs_swap); 213 } 214 215 static void *tp_field__ptr(struct tp_field *field, struct perf_sample *sample) 216 { 217 return sample->raw_data + field->offset; 218 } 219 220 static int __tp_field__init_ptr(struct tp_field *field, int offset) 221 { 222 field->offset = offset; 223 field->pointer = tp_field__ptr; 224 return 0; 225 } 226 227 static int tp_field__init_ptr(struct tp_field *field, struct tep_format_field *format_field) 228 { 229 return __tp_field__init_ptr(field, format_field->offset); 230 } 231 232 struct syscall_tp { 233 struct tp_field id; 234 union { 235 struct tp_field args, ret; 236 }; 237 }; 238 239 static int perf_evsel__init_tp_uint_field(struct perf_evsel *evsel, 240 struct tp_field *field, 241 const char *name) 242 { 243 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 244 245 if (format_field == NULL) 246 return -1; 247 248 return tp_field__init_uint(field, format_field, evsel->needs_swap); 249 } 250 251 #define perf_evsel__init_sc_tp_uint_field(evsel, name) \ 252 ({ struct syscall_tp *sc = evsel->priv;\ 253 perf_evsel__init_tp_uint_field(evsel, &sc->name, #name); }) 254 255 static int perf_evsel__init_tp_ptr_field(struct perf_evsel *evsel, 256 struct tp_field *field, 257 const char *name) 258 { 259 struct tep_format_field *format_field = perf_evsel__field(evsel, name); 260 261 if (format_field == NULL) 262 return -1; 263 264 return tp_field__init_ptr(field, format_field); 265 } 266 267 #define perf_evsel__init_sc_tp_ptr_field(evsel, name) \ 268 ({ struct syscall_tp *sc = evsel->priv;\ 269 perf_evsel__init_tp_ptr_field(evsel, &sc->name, #name); }) 270 271 static void perf_evsel__delete_priv(struct perf_evsel *evsel) 272 { 273 zfree(&evsel->priv); 274 perf_evsel__delete(evsel); 275 } 276 277 static int perf_evsel__init_syscall_tp(struct perf_evsel *evsel) 278 { 279 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 280 281 if (evsel->priv != NULL) { 282 if (perf_evsel__init_tp_uint_field(evsel, &sc->id, "__syscall_nr") && 283 perf_evsel__init_tp_uint_field(evsel, &sc->id, "nr")) 284 goto out_delete; 285 return 0; 286 } 287 288 return -ENOMEM; 289 out_delete: 290 zfree(&evsel->priv); 291 return -ENOENT; 292 } 293 294 static int perf_evsel__init_augmented_syscall_tp(struct perf_evsel *evsel, struct perf_evsel *tp) 295 { 296 struct syscall_tp *sc = evsel->priv = malloc(sizeof(struct syscall_tp)); 297 298 if (evsel->priv != NULL) { 299 struct tep_format_field *syscall_id = perf_evsel__field(tp, "id"); 300 if (syscall_id == NULL) 301 syscall_id = perf_evsel__field(tp, "__syscall_nr"); 302 if (syscall_id == NULL) 303 goto out_delete; 304 if (__tp_field__init_uint(&sc->id, syscall_id->size, syscall_id->offset, evsel->needs_swap)) 305 goto out_delete; 306 307 return 0; 308 } 309 310 return -ENOMEM; 311 out_delete: 312 zfree(&evsel->priv); 313 return -EINVAL; 314 } 315 316 static int perf_evsel__init_augmented_syscall_tp_args(struct perf_evsel *evsel) 317 { 318 struct syscall_tp *sc = evsel->priv; 319 320 return __tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64)); 321 } 322 323 static int perf_evsel__init_augmented_syscall_tp_ret(struct perf_evsel *evsel) 324 { 325 struct syscall_tp *sc = evsel->priv; 326 327 return __tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap); 328 } 329 330 static int perf_evsel__init_raw_syscall_tp(struct perf_evsel *evsel, void *handler) 331 { 332 evsel->priv = malloc(sizeof(struct syscall_tp)); 333 if (evsel->priv != NULL) { 334 if (perf_evsel__init_sc_tp_uint_field(evsel, id)) 335 goto out_delete; 336 337 evsel->handler = handler; 338 return 0; 339 } 340 341 return -ENOMEM; 342 343 out_delete: 344 zfree(&evsel->priv); 345 return -ENOENT; 346 } 347 348 static struct perf_evsel *perf_evsel__raw_syscall_newtp(const char *direction, void *handler) 349 { 350 struct perf_evsel *evsel = perf_evsel__newtp("raw_syscalls", direction); 351 352 /* older kernel (e.g., RHEL6) use syscalls:{enter,exit} */ 353 if (IS_ERR(evsel)) 354 evsel = perf_evsel__newtp("syscalls", direction); 355 356 if (IS_ERR(evsel)) 357 return NULL; 358 359 if (perf_evsel__init_raw_syscall_tp(evsel, handler)) 360 goto out_delete; 361 362 return evsel; 363 364 out_delete: 365 perf_evsel__delete_priv(evsel); 366 return NULL; 367 } 368 369 #define perf_evsel__sc_tp_uint(evsel, name, sample) \ 370 ({ struct syscall_tp *fields = evsel->priv; \ 371 fields->name.integer(&fields->name, sample); }) 372 373 #define perf_evsel__sc_tp_ptr(evsel, name, sample) \ 374 ({ struct syscall_tp *fields = evsel->priv; \ 375 fields->name.pointer(&fields->name, sample); }) 376 377 size_t strarray__scnprintf(struct strarray *sa, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 378 { 379 int idx = val - sa->offset; 380 381 if (idx < 0 || idx >= sa->nr_entries || sa->entries[idx] == NULL) { 382 size_t printed = scnprintf(bf, size, intfmt, val); 383 if (show_prefix) 384 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sa->prefix); 385 return printed; 386 } 387 388 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 389 } 390 391 static size_t __syscall_arg__scnprintf_strarray(char *bf, size_t size, 392 const char *intfmt, 393 struct syscall_arg *arg) 394 { 395 return strarray__scnprintf(arg->parm, bf, size, intfmt, arg->show_string_prefix, arg->val); 396 } 397 398 static size_t syscall_arg__scnprintf_strarray(char *bf, size_t size, 399 struct syscall_arg *arg) 400 { 401 return __syscall_arg__scnprintf_strarray(bf, size, "%d", arg); 402 } 403 404 #define SCA_STRARRAY syscall_arg__scnprintf_strarray 405 406 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 407 { 408 size_t printed; 409 int i; 410 411 for (i = 0; i < sas->nr_entries; ++i) { 412 struct strarray *sa = sas->entries[i]; 413 int idx = val - sa->offset; 414 415 if (idx >= 0 && idx < sa->nr_entries) { 416 if (sa->entries[idx] == NULL) 417 break; 418 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 419 } 420 } 421 422 printed = scnprintf(bf, size, intfmt, val); 423 if (show_prefix) 424 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 425 return printed; 426 } 427 428 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 429 struct syscall_arg *arg) 430 { 431 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 432 } 433 434 #ifndef AT_FDCWD 435 #define AT_FDCWD -100 436 #endif 437 438 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 439 struct syscall_arg *arg) 440 { 441 int fd = arg->val; 442 const char *prefix = "AT_FD"; 443 444 if (fd == AT_FDCWD) 445 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 446 447 return syscall_arg__scnprintf_fd(bf, size, arg); 448 } 449 450 #define SCA_FDAT syscall_arg__scnprintf_fd_at 451 452 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 453 struct syscall_arg *arg); 454 455 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 456 457 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 458 { 459 return scnprintf(bf, size, "%#lx", arg->val); 460 } 461 462 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 463 { 464 if (arg->val == 0) 465 return scnprintf(bf, size, "NULL"); 466 return syscall_arg__scnprintf_hex(bf, size, arg); 467 } 468 469 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 470 { 471 return scnprintf(bf, size, "%d", arg->val); 472 } 473 474 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 475 { 476 return scnprintf(bf, size, "%ld", arg->val); 477 } 478 479 static const char *bpf_cmd[] = { 480 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 481 "MAP_GET_NEXT_KEY", "PROG_LOAD", 482 }; 483 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 484 485 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 486 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 487 488 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 489 static DEFINE_STRARRAY(itimers, "ITIMER_"); 490 491 static const char *keyctl_options[] = { 492 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 493 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 494 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 495 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 496 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 497 }; 498 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 499 500 static const char *whences[] = { "SET", "CUR", "END", 501 #ifdef SEEK_DATA 502 "DATA", 503 #endif 504 #ifdef SEEK_HOLE 505 "HOLE", 506 #endif 507 }; 508 static DEFINE_STRARRAY(whences, "SEEK_"); 509 510 static const char *fcntl_cmds[] = { 511 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 512 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 513 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 514 "GETOWNER_UIDS", 515 }; 516 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 517 518 static const char *fcntl_linux_specific_cmds[] = { 519 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 520 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 521 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 522 }; 523 524 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 525 526 static struct strarray *fcntl_cmds_arrays[] = { 527 &strarray__fcntl_cmds, 528 &strarray__fcntl_linux_specific_cmds, 529 }; 530 531 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 532 533 static const char *rlimit_resources[] = { 534 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 535 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 536 "RTTIME", 537 }; 538 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 539 540 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 541 static DEFINE_STRARRAY(sighow, "SIG_"); 542 543 static const char *clockid[] = { 544 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 545 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 546 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 547 }; 548 static DEFINE_STRARRAY(clockid, "CLOCK_"); 549 550 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 551 struct syscall_arg *arg) 552 { 553 bool show_prefix = arg->show_string_prefix; 554 const char *suffix = "_OK"; 555 size_t printed = 0; 556 int mode = arg->val; 557 558 if (mode == F_OK) /* 0 */ 559 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 560 #define P_MODE(n) \ 561 if (mode & n##_OK) { \ 562 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 563 mode &= ~n##_OK; \ 564 } 565 566 P_MODE(R); 567 P_MODE(W); 568 P_MODE(X); 569 #undef P_MODE 570 571 if (mode) 572 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 573 574 return printed; 575 } 576 577 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 578 579 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 580 struct syscall_arg *arg); 581 582 #define SCA_FILENAME syscall_arg__scnprintf_filename 583 584 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 585 struct syscall_arg *arg) 586 { 587 bool show_prefix = arg->show_string_prefix; 588 const char *prefix = "O_"; 589 int printed = 0, flags = arg->val; 590 591 #define P_FLAG(n) \ 592 if (flags & O_##n) { \ 593 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 594 flags &= ~O_##n; \ 595 } 596 597 P_FLAG(CLOEXEC); 598 P_FLAG(NONBLOCK); 599 #undef P_FLAG 600 601 if (flags) 602 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 603 604 return printed; 605 } 606 607 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 608 609 #ifndef GRND_NONBLOCK 610 #define GRND_NONBLOCK 0x0001 611 #endif 612 #ifndef GRND_RANDOM 613 #define GRND_RANDOM 0x0002 614 #endif 615 616 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 617 struct syscall_arg *arg) 618 { 619 bool show_prefix = arg->show_string_prefix; 620 const char *prefix = "GRND_"; 621 int printed = 0, flags = arg->val; 622 623 #define P_FLAG(n) \ 624 if (flags & GRND_##n) { \ 625 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 626 flags &= ~GRND_##n; \ 627 } 628 629 P_FLAG(RANDOM); 630 P_FLAG(NONBLOCK); 631 #undef P_FLAG 632 633 if (flags) 634 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 635 636 return printed; 637 } 638 639 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 640 641 #define STRARRAY(name, array) \ 642 { .scnprintf = SCA_STRARRAY, \ 643 .parm = &strarray__##array, } 644 645 #include "trace/beauty/arch_errno_names.c" 646 #include "trace/beauty/eventfd.c" 647 #include "trace/beauty/futex_op.c" 648 #include "trace/beauty/futex_val3.c" 649 #include "trace/beauty/mmap.c" 650 #include "trace/beauty/mode_t.c" 651 #include "trace/beauty/msg_flags.c" 652 #include "trace/beauty/open_flags.c" 653 #include "trace/beauty/perf_event_open.c" 654 #include "trace/beauty/pid.c" 655 #include "trace/beauty/sched_policy.c" 656 #include "trace/beauty/seccomp.c" 657 #include "trace/beauty/signum.c" 658 #include "trace/beauty/socket_type.c" 659 #include "trace/beauty/waitid_options.c" 660 661 struct syscall_arg_fmt { 662 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 663 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 664 void *parm; 665 const char *name; 666 bool show_zero; 667 }; 668 669 static struct syscall_fmt { 670 const char *name; 671 const char *alias; 672 struct syscall_arg_fmt arg[6]; 673 u8 nr_args; 674 bool errpid; 675 bool timeout; 676 bool hexret; 677 } syscall_fmts[] = { 678 { .name = "access", 679 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 680 { .name = "arch_prctl", 681 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 682 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 683 { .name = "bind", 684 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, 685 { .name = "bpf", 686 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 687 { .name = "brk", .hexret = true, 688 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 689 { .name = "clock_gettime", 690 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 691 { .name = "clone", .errpid = true, .nr_args = 5, 692 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 693 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 694 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 695 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 696 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 697 { .name = "close", 698 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 699 { .name = "connect", 700 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, 701 { .name = "epoll_ctl", 702 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 703 { .name = "eventfd2", 704 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 705 { .name = "fchmodat", 706 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 707 { .name = "fchownat", 708 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 709 { .name = "fcntl", 710 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 711 .parm = &strarrays__fcntl_cmds_arrays, 712 .show_zero = true, }, 713 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 714 { .name = "flock", 715 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 716 { .name = "fstat", .alias = "newfstat", }, 717 { .name = "fstatat", .alias = "newfstatat", }, 718 { .name = "futex", 719 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 720 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 721 { .name = "futimesat", 722 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 723 { .name = "getitimer", 724 .arg = { [0] = STRARRAY(which, itimers), }, }, 725 { .name = "getpid", .errpid = true, }, 726 { .name = "getpgid", .errpid = true, }, 727 { .name = "getppid", .errpid = true, }, 728 { .name = "getrandom", 729 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 730 { .name = "getrlimit", 731 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 732 { .name = "gettid", .errpid = true, }, 733 { .name = "ioctl", 734 .arg = { 735 #if defined(__i386__) || defined(__x86_64__) 736 /* 737 * FIXME: Make this available to all arches. 738 */ 739 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 740 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 741 #else 742 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 743 #endif 744 { .name = "kcmp", .nr_args = 5, 745 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 746 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 747 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 748 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 749 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 750 { .name = "keyctl", 751 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 752 { .name = "kill", 753 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 754 { .name = "linkat", 755 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 756 { .name = "lseek", 757 .arg = { [2] = STRARRAY(whence, whences), }, }, 758 { .name = "lstat", .alias = "newlstat", }, 759 { .name = "madvise", 760 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 761 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 762 { .name = "mkdirat", 763 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 764 { .name = "mknodat", 765 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 766 { .name = "mmap", .hexret = true, 767 /* The standard mmap maps to old_mmap on s390x */ 768 #if defined(__s390x__) 769 .alias = "old_mmap", 770 #endif 771 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 772 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 773 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 774 { .name = "mount", 775 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 776 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 777 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 778 { .name = "mprotect", 779 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 780 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 781 { .name = "mq_unlink", 782 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 783 { .name = "mremap", .hexret = true, 784 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 785 { .name = "name_to_handle_at", 786 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 787 { .name = "newfstatat", 788 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 789 { .name = "open", 790 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 791 { .name = "open_by_handle_at", 792 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 793 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 794 { .name = "openat", 795 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 796 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 797 { .name = "perf_event_open", 798 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 799 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 800 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 801 { .name = "pipe2", 802 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 803 { .name = "pkey_alloc", 804 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 805 { .name = "pkey_free", 806 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 807 { .name = "pkey_mprotect", 808 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 809 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 810 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 811 { .name = "poll", .timeout = true, }, 812 { .name = "ppoll", .timeout = true, }, 813 { .name = "prctl", 814 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 815 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 816 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 817 { .name = "pread", .alias = "pread64", }, 818 { .name = "preadv", .alias = "pread", }, 819 { .name = "prlimit64", 820 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 821 { .name = "pwrite", .alias = "pwrite64", }, 822 { .name = "readlinkat", 823 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 824 { .name = "recvfrom", 825 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 826 { .name = "recvmmsg", 827 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 828 { .name = "recvmsg", 829 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 830 { .name = "renameat", 831 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 832 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 833 { .name = "renameat2", 834 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 835 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 836 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 837 { .name = "rt_sigaction", 838 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 839 { .name = "rt_sigprocmask", 840 .arg = { [0] = STRARRAY(how, sighow), }, }, 841 { .name = "rt_sigqueueinfo", 842 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 843 { .name = "rt_tgsigqueueinfo", 844 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 845 { .name = "sched_setscheduler", 846 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 847 { .name = "seccomp", 848 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 849 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 850 { .name = "select", .timeout = true, }, 851 { .name = "sendmmsg", 852 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 853 { .name = "sendmsg", 854 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 855 { .name = "sendto", 856 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 857 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 858 { .name = "set_tid_address", .errpid = true, }, 859 { .name = "setitimer", 860 .arg = { [0] = STRARRAY(which, itimers), }, }, 861 { .name = "setrlimit", 862 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 863 { .name = "socket", 864 .arg = { [0] = STRARRAY(family, socket_families), 865 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 866 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 867 { .name = "socketpair", 868 .arg = { [0] = STRARRAY(family, socket_families), 869 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 870 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 871 { .name = "stat", .alias = "newstat", }, 872 { .name = "statx", 873 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 874 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 875 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 876 { .name = "swapoff", 877 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 878 { .name = "swapon", 879 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 880 { .name = "symlinkat", 881 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 882 { .name = "tgkill", 883 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 884 { .name = "tkill", 885 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 886 { .name = "umount2", .alias = "umount", 887 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 888 { .name = "uname", .alias = "newuname", }, 889 { .name = "unlinkat", 890 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 891 { .name = "utimensat", 892 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 893 { .name = "wait4", .errpid = true, 894 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 895 { .name = "waitid", .errpid = true, 896 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 897 }; 898 899 static int syscall_fmt__cmp(const void *name, const void *fmtp) 900 { 901 const struct syscall_fmt *fmt = fmtp; 902 return strcmp(name, fmt->name); 903 } 904 905 static struct syscall_fmt *syscall_fmt__find(const char *name) 906 { 907 const int nmemb = ARRAY_SIZE(syscall_fmts); 908 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 909 } 910 911 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 912 { 913 int i, nmemb = ARRAY_SIZE(syscall_fmts); 914 915 for (i = 0; i < nmemb; ++i) { 916 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 917 return &syscall_fmts[i]; 918 } 919 920 return NULL; 921 } 922 923 /* 924 * is_exit: is this "exit" or "exit_group"? 925 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 926 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 927 */ 928 struct syscall { 929 struct tep_event *tp_format; 930 int nr_args; 931 int args_size; 932 bool is_exit; 933 bool is_open; 934 struct tep_format_field *args; 935 const char *name; 936 struct syscall_fmt *fmt; 937 struct syscall_arg_fmt *arg_fmt; 938 }; 939 940 struct bpf_map_syscall_entry { 941 bool enabled; 942 }; 943 944 /* 945 * We need to have this 'calculated' boolean because in some cases we really 946 * don't know what is the duration of a syscall, for instance, when we start 947 * a session and some threads are waiting for a syscall to finish, say 'poll', 948 * in which case all we can do is to print "( ? ) for duration and for the 949 * start timestamp. 950 */ 951 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 952 { 953 double duration = (double)t / NSEC_PER_MSEC; 954 size_t printed = fprintf(fp, "("); 955 956 if (!calculated) 957 printed += fprintf(fp, " "); 958 else if (duration >= 1.0) 959 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 960 else if (duration >= 0.01) 961 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 962 else 963 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 964 return printed + fprintf(fp, "): "); 965 } 966 967 /** 968 * filename.ptr: The filename char pointer that will be vfs_getname'd 969 * filename.entry_str_pos: Where to insert the string translated from 970 * filename.ptr by the vfs_getname tracepoint/kprobe. 971 * ret_scnprintf: syscall args may set this to a different syscall return 972 * formatter, for instance, fcntl may return fds, file flags, etc. 973 */ 974 struct thread_trace { 975 u64 entry_time; 976 bool entry_pending; 977 unsigned long nr_events; 978 unsigned long pfmaj, pfmin; 979 char *entry_str; 980 double runtime_ms; 981 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 982 struct { 983 unsigned long ptr; 984 short int entry_str_pos; 985 bool pending_open; 986 unsigned int namelen; 987 char *name; 988 } filename; 989 struct { 990 int max; 991 struct file *table; 992 } files; 993 994 struct intlist *syscall_stats; 995 }; 996 997 static struct thread_trace *thread_trace__new(void) 998 { 999 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1000 1001 if (ttrace) 1002 ttrace->files.max = -1; 1003 1004 ttrace->syscall_stats = intlist__new(NULL); 1005 1006 return ttrace; 1007 } 1008 1009 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1010 { 1011 struct thread_trace *ttrace; 1012 1013 if (thread == NULL) 1014 goto fail; 1015 1016 if (thread__priv(thread) == NULL) 1017 thread__set_priv(thread, thread_trace__new()); 1018 1019 if (thread__priv(thread) == NULL) 1020 goto fail; 1021 1022 ttrace = thread__priv(thread); 1023 ++ttrace->nr_events; 1024 1025 return ttrace; 1026 fail: 1027 color_fprintf(fp, PERF_COLOR_RED, 1028 "WARNING: not enough memory, dropping samples!\n"); 1029 return NULL; 1030 } 1031 1032 1033 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1034 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1035 { 1036 struct thread_trace *ttrace = thread__priv(arg->thread); 1037 1038 ttrace->ret_scnprintf = ret_scnprintf; 1039 } 1040 1041 #define TRACE_PFMAJ (1 << 0) 1042 #define TRACE_PFMIN (1 << 1) 1043 1044 static const size_t trace__entry_str_size = 2048; 1045 1046 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1047 { 1048 if (fd < 0) 1049 return NULL; 1050 1051 if (fd > ttrace->files.max) { 1052 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1053 1054 if (nfiles == NULL) 1055 return NULL; 1056 1057 if (ttrace->files.max != -1) { 1058 memset(nfiles + ttrace->files.max + 1, 0, 1059 (fd - ttrace->files.max) * sizeof(struct file)); 1060 } else { 1061 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1062 } 1063 1064 ttrace->files.table = nfiles; 1065 ttrace->files.max = fd; 1066 } 1067 1068 return ttrace->files.table + fd; 1069 } 1070 1071 struct file *thread__files_entry(struct thread *thread, int fd) 1072 { 1073 return thread_trace__files_entry(thread__priv(thread), fd); 1074 } 1075 1076 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1077 { 1078 struct thread_trace *ttrace = thread__priv(thread); 1079 struct file *file = thread_trace__files_entry(ttrace, fd); 1080 1081 if (file != NULL) { 1082 struct stat st; 1083 if (stat(pathname, &st) == 0) 1084 file->dev_maj = major(st.st_rdev); 1085 file->pathname = strdup(pathname); 1086 if (file->pathname) 1087 return 0; 1088 } 1089 1090 return -1; 1091 } 1092 1093 static int thread__read_fd_path(struct thread *thread, int fd) 1094 { 1095 char linkname[PATH_MAX], pathname[PATH_MAX]; 1096 struct stat st; 1097 int ret; 1098 1099 if (thread->pid_ == thread->tid) { 1100 scnprintf(linkname, sizeof(linkname), 1101 "/proc/%d/fd/%d", thread->pid_, fd); 1102 } else { 1103 scnprintf(linkname, sizeof(linkname), 1104 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1105 } 1106 1107 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1108 return -1; 1109 1110 ret = readlink(linkname, pathname, sizeof(pathname)); 1111 1112 if (ret < 0 || ret > st.st_size) 1113 return -1; 1114 1115 pathname[ret] = '\0'; 1116 return trace__set_fd_pathname(thread, fd, pathname); 1117 } 1118 1119 static const char *thread__fd_path(struct thread *thread, int fd, 1120 struct trace *trace) 1121 { 1122 struct thread_trace *ttrace = thread__priv(thread); 1123 1124 if (ttrace == NULL) 1125 return NULL; 1126 1127 if (fd < 0) 1128 return NULL; 1129 1130 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1131 if (!trace->live) 1132 return NULL; 1133 ++trace->stats.proc_getname; 1134 if (thread__read_fd_path(thread, fd)) 1135 return NULL; 1136 } 1137 1138 return ttrace->files.table[fd].pathname; 1139 } 1140 1141 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1142 { 1143 int fd = arg->val; 1144 size_t printed = scnprintf(bf, size, "%d", fd); 1145 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1146 1147 if (path) 1148 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1149 1150 return printed; 1151 } 1152 1153 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1154 { 1155 size_t printed = scnprintf(bf, size, "%d", fd); 1156 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1157 1158 if (thread) { 1159 const char *path = thread__fd_path(thread, fd, trace); 1160 1161 if (path) 1162 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1163 1164 thread__put(thread); 1165 } 1166 1167 return printed; 1168 } 1169 1170 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1171 struct syscall_arg *arg) 1172 { 1173 int fd = arg->val; 1174 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1175 struct thread_trace *ttrace = thread__priv(arg->thread); 1176 1177 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1178 zfree(&ttrace->files.table[fd].pathname); 1179 1180 return printed; 1181 } 1182 1183 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1184 unsigned long ptr) 1185 { 1186 struct thread_trace *ttrace = thread__priv(thread); 1187 1188 ttrace->filename.ptr = ptr; 1189 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1190 } 1191 1192 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1193 { 1194 struct augmented_arg *augmented_arg = arg->augmented.args; 1195 1196 return scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1197 } 1198 1199 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1200 struct syscall_arg *arg) 1201 { 1202 unsigned long ptr = arg->val; 1203 1204 if (arg->augmented.args) 1205 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1206 1207 if (!arg->trace->vfs_getname) 1208 return scnprintf(bf, size, "%#x", ptr); 1209 1210 thread__set_filename_pos(arg->thread, bf, ptr); 1211 return 0; 1212 } 1213 1214 static bool trace__filter_duration(struct trace *trace, double t) 1215 { 1216 return t < (trace->duration_filter * NSEC_PER_MSEC); 1217 } 1218 1219 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1220 { 1221 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1222 1223 return fprintf(fp, "%10.3f ", ts); 1224 } 1225 1226 /* 1227 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1228 * using ttrace->entry_time for a thread that receives a sys_exit without 1229 * first having received a sys_enter ("poll" issued before tracing session 1230 * starts, lost sys_enter exit due to ring buffer overflow). 1231 */ 1232 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1233 { 1234 if (tstamp > 0) 1235 return __trace__fprintf_tstamp(trace, tstamp, fp); 1236 1237 return fprintf(fp, " ? "); 1238 } 1239 1240 static bool done = false; 1241 static bool interrupted = false; 1242 1243 static void sig_handler(int sig) 1244 { 1245 done = true; 1246 interrupted = sig == SIGINT; 1247 } 1248 1249 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1250 { 1251 size_t printed = 0; 1252 1253 if (trace->multiple_threads) { 1254 if (trace->show_comm) 1255 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1256 printed += fprintf(fp, "%d ", thread->tid); 1257 } 1258 1259 return printed; 1260 } 1261 1262 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1263 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1264 { 1265 size_t printed = 0; 1266 1267 if (trace->show_tstamp) 1268 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1269 if (trace->show_duration) 1270 printed += fprintf_duration(duration, duration_calculated, fp); 1271 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1272 } 1273 1274 static int trace__process_event(struct trace *trace, struct machine *machine, 1275 union perf_event *event, struct perf_sample *sample) 1276 { 1277 int ret = 0; 1278 1279 switch (event->header.type) { 1280 case PERF_RECORD_LOST: 1281 color_fprintf(trace->output, PERF_COLOR_RED, 1282 "LOST %" PRIu64 " events!\n", event->lost.lost); 1283 ret = machine__process_lost_event(machine, event, sample); 1284 break; 1285 default: 1286 ret = machine__process_event(machine, event, sample); 1287 break; 1288 } 1289 1290 return ret; 1291 } 1292 1293 static int trace__tool_process(struct perf_tool *tool, 1294 union perf_event *event, 1295 struct perf_sample *sample, 1296 struct machine *machine) 1297 { 1298 struct trace *trace = container_of(tool, struct trace, tool); 1299 return trace__process_event(trace, machine, event, sample); 1300 } 1301 1302 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1303 { 1304 struct machine *machine = vmachine; 1305 1306 if (machine->kptr_restrict_warned) 1307 return NULL; 1308 1309 if (symbol_conf.kptr_restrict) { 1310 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1311 "Check /proc/sys/kernel/kptr_restrict.\n\n" 1312 "Kernel samples will not be resolved.\n"); 1313 machine->kptr_restrict_warned = true; 1314 return NULL; 1315 } 1316 1317 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1318 } 1319 1320 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 1321 { 1322 int err = symbol__init(NULL); 1323 1324 if (err) 1325 return err; 1326 1327 trace->host = machine__new_host(); 1328 if (trace->host == NULL) 1329 return -ENOMEM; 1330 1331 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1332 if (err < 0) 1333 goto out; 1334 1335 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1336 evlist->threads, trace__tool_process, false, 1337 1); 1338 out: 1339 if (err) 1340 symbol__exit(); 1341 1342 return err; 1343 } 1344 1345 static void trace__symbols__exit(struct trace *trace) 1346 { 1347 machine__exit(trace->host); 1348 trace->host = NULL; 1349 1350 symbol__exit(); 1351 } 1352 1353 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1354 { 1355 int idx; 1356 1357 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1358 nr_args = sc->fmt->nr_args; 1359 1360 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1361 if (sc->arg_fmt == NULL) 1362 return -1; 1363 1364 for (idx = 0; idx < nr_args; ++idx) { 1365 if (sc->fmt) 1366 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1367 } 1368 1369 sc->nr_args = nr_args; 1370 return 0; 1371 } 1372 1373 static int syscall__set_arg_fmts(struct syscall *sc) 1374 { 1375 struct tep_format_field *field, *last_field = NULL; 1376 int idx = 0, len; 1377 1378 for (field = sc->args; field; field = field->next, ++idx) { 1379 last_field = field; 1380 1381 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1382 continue; 1383 1384 if (strcmp(field->type, "const char *") == 0 && 1385 (strcmp(field->name, "filename") == 0 || 1386 strcmp(field->name, "path") == 0 || 1387 strcmp(field->name, "pathname") == 0)) 1388 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1389 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1390 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1391 else if (strcmp(field->type, "pid_t") == 0) 1392 sc->arg_fmt[idx].scnprintf = SCA_PID; 1393 else if (strcmp(field->type, "umode_t") == 0) 1394 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1395 else if ((strcmp(field->type, "int") == 0 || 1396 strcmp(field->type, "unsigned int") == 0 || 1397 strcmp(field->type, "long") == 0) && 1398 (len = strlen(field->name)) >= 2 && 1399 strcmp(field->name + len - 2, "fd") == 0) { 1400 /* 1401 * /sys/kernel/tracing/events/syscalls/sys_enter* 1402 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1403 * 65 int 1404 * 23 unsigned int 1405 * 7 unsigned long 1406 */ 1407 sc->arg_fmt[idx].scnprintf = SCA_FD; 1408 } 1409 } 1410 1411 if (last_field) 1412 sc->args_size = last_field->offset + last_field->size; 1413 1414 return 0; 1415 } 1416 1417 static int trace__read_syscall_info(struct trace *trace, int id) 1418 { 1419 char tp_name[128]; 1420 struct syscall *sc; 1421 const char *name = syscalltbl__name(trace->sctbl, id); 1422 1423 if (name == NULL) 1424 return -1; 1425 1426 if (id > trace->syscalls.max) { 1427 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1428 1429 if (nsyscalls == NULL) 1430 return -1; 1431 1432 if (trace->syscalls.max != -1) { 1433 memset(nsyscalls + trace->syscalls.max + 1, 0, 1434 (id - trace->syscalls.max) * sizeof(*sc)); 1435 } else { 1436 memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); 1437 } 1438 1439 trace->syscalls.table = nsyscalls; 1440 trace->syscalls.max = id; 1441 } 1442 1443 sc = trace->syscalls.table + id; 1444 sc->name = name; 1445 1446 sc->fmt = syscall_fmt__find(sc->name); 1447 1448 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1449 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1450 1451 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1452 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1453 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1454 } 1455 1456 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1457 return -1; 1458 1459 if (IS_ERR(sc->tp_format)) 1460 return -1; 1461 1462 sc->args = sc->tp_format->format.fields; 1463 /* 1464 * We need to check and discard the first variable '__syscall_nr' 1465 * or 'nr' that mean the syscall number. It is needless here. 1466 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1467 */ 1468 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1469 sc->args = sc->args->next; 1470 --sc->nr_args; 1471 } 1472 1473 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1474 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1475 1476 return syscall__set_arg_fmts(sc); 1477 } 1478 1479 static int trace__validate_ev_qualifier(struct trace *trace) 1480 { 1481 int err = 0, i; 1482 size_t nr_allocated; 1483 struct str_node *pos; 1484 1485 trace->ev_qualifier_ids.nr = strlist__nr_entries(trace->ev_qualifier); 1486 trace->ev_qualifier_ids.entries = malloc(trace->ev_qualifier_ids.nr * 1487 sizeof(trace->ev_qualifier_ids.entries[0])); 1488 1489 if (trace->ev_qualifier_ids.entries == NULL) { 1490 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1491 trace->output); 1492 err = -EINVAL; 1493 goto out; 1494 } 1495 1496 nr_allocated = trace->ev_qualifier_ids.nr; 1497 i = 0; 1498 1499 strlist__for_each_entry(pos, trace->ev_qualifier) { 1500 const char *sc = pos->s; 1501 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1502 1503 if (id < 0) { 1504 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1505 if (id >= 0) 1506 goto matches; 1507 1508 if (err == 0) { 1509 fputs("Error:\tInvalid syscall ", trace->output); 1510 err = -EINVAL; 1511 } else { 1512 fputs(", ", trace->output); 1513 } 1514 1515 fputs(sc, trace->output); 1516 } 1517 matches: 1518 trace->ev_qualifier_ids.entries[i++] = id; 1519 if (match_next == -1) 1520 continue; 1521 1522 while (1) { 1523 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1524 if (id < 0) 1525 break; 1526 if (nr_allocated == trace->ev_qualifier_ids.nr) { 1527 void *entries; 1528 1529 nr_allocated += 8; 1530 entries = realloc(trace->ev_qualifier_ids.entries, 1531 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1532 if (entries == NULL) { 1533 err = -ENOMEM; 1534 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1535 goto out_free; 1536 } 1537 trace->ev_qualifier_ids.entries = entries; 1538 } 1539 trace->ev_qualifier_ids.nr++; 1540 trace->ev_qualifier_ids.entries[i++] = id; 1541 } 1542 } 1543 1544 if (err < 0) { 1545 fputs("\nHint:\ttry 'perf list syscalls:sys_enter_*'" 1546 "\nHint:\tand: 'man syscalls'\n", trace->output); 1547 out_free: 1548 zfree(&trace->ev_qualifier_ids.entries); 1549 trace->ev_qualifier_ids.nr = 0; 1550 } 1551 out: 1552 return err; 1553 } 1554 1555 /* 1556 * args is to be interpreted as a series of longs but we need to handle 1557 * 8-byte unaligned accesses. args points to raw_data within the event 1558 * and raw_data is guaranteed to be 8-byte unaligned because it is 1559 * preceded by raw_size which is a u32. So we need to copy args to a temp 1560 * variable to read it. Most notably this avoids extended load instructions 1561 * on unaligned addresses 1562 */ 1563 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1564 { 1565 unsigned long val; 1566 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1567 1568 memcpy(&val, p, sizeof(val)); 1569 return val; 1570 } 1571 1572 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1573 struct syscall_arg *arg) 1574 { 1575 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1576 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1577 1578 return scnprintf(bf, size, "arg%d: ", arg->idx); 1579 } 1580 1581 /* 1582 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1583 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1584 * in tools/perf/trace/beauty/mount_flags.c 1585 */ 1586 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1587 { 1588 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1589 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1590 1591 return val; 1592 } 1593 1594 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1595 struct syscall_arg *arg, unsigned long val) 1596 { 1597 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1598 arg->val = val; 1599 if (sc->arg_fmt[arg->idx].parm) 1600 arg->parm = sc->arg_fmt[arg->idx].parm; 1601 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1602 } 1603 return scnprintf(bf, size, "%ld", val); 1604 } 1605 1606 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1607 unsigned char *args, void *augmented_args, int augmented_args_size, 1608 struct trace *trace, struct thread *thread) 1609 { 1610 size_t printed = 0; 1611 unsigned long val; 1612 u8 bit = 1; 1613 struct syscall_arg arg = { 1614 .args = args, 1615 .augmented = { 1616 .size = augmented_args_size, 1617 .args = augmented_args, 1618 }, 1619 .idx = 0, 1620 .mask = 0, 1621 .trace = trace, 1622 .thread = thread, 1623 .show_string_prefix = trace->show_string_prefix, 1624 }; 1625 struct thread_trace *ttrace = thread__priv(thread); 1626 1627 /* 1628 * Things like fcntl will set this in its 'cmd' formatter to pick the 1629 * right formatter for the return value (an fd? file flags?), which is 1630 * not needed for syscalls that always return a given type, say an fd. 1631 */ 1632 ttrace->ret_scnprintf = NULL; 1633 1634 if (sc->args != NULL) { 1635 struct tep_format_field *field; 1636 1637 for (field = sc->args; field; 1638 field = field->next, ++arg.idx, bit <<= 1) { 1639 if (arg.mask & bit) 1640 continue; 1641 1642 val = syscall_arg__val(&arg, arg.idx); 1643 /* 1644 * Some syscall args need some mask, most don't and 1645 * return val untouched. 1646 */ 1647 val = syscall__mask_val(sc, &arg, val); 1648 1649 /* 1650 * Suppress this argument if its value is zero and 1651 * and we don't have a string associated in an 1652 * strarray for it. 1653 */ 1654 if (val == 0 && 1655 !trace->show_zeros && 1656 !(sc->arg_fmt && 1657 (sc->arg_fmt[arg.idx].show_zero || 1658 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1659 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1660 sc->arg_fmt[arg.idx].parm)) 1661 continue; 1662 1663 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1664 1665 if (trace->show_arg_names) 1666 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1667 1668 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1669 } 1670 } else if (IS_ERR(sc->tp_format)) { 1671 /* 1672 * If we managed to read the tracepoint /format file, then we 1673 * may end up not having any args, like with gettid(), so only 1674 * print the raw args when we didn't manage to read it. 1675 */ 1676 while (arg.idx < sc->nr_args) { 1677 if (arg.mask & bit) 1678 goto next_arg; 1679 val = syscall_arg__val(&arg, arg.idx); 1680 if (printed) 1681 printed += scnprintf(bf + printed, size - printed, ", "); 1682 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1683 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1684 next_arg: 1685 ++arg.idx; 1686 bit <<= 1; 1687 } 1688 } 1689 1690 return printed; 1691 } 1692 1693 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, 1694 union perf_event *event, 1695 struct perf_sample *sample); 1696 1697 static struct syscall *trace__syscall_info(struct trace *trace, 1698 struct perf_evsel *evsel, int id) 1699 { 1700 1701 if (id < 0) { 1702 1703 /* 1704 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1705 * before that, leaving at a higher verbosity level till that is 1706 * explained. Reproduced with plain ftrace with: 1707 * 1708 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1709 * grep "NR -1 " /t/trace_pipe 1710 * 1711 * After generating some load on the machine. 1712 */ 1713 if (verbose > 1) { 1714 static u64 n; 1715 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1716 id, perf_evsel__name(evsel), ++n); 1717 } 1718 return NULL; 1719 } 1720 1721 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && 1722 trace__read_syscall_info(trace, id)) 1723 goto out_cant_read; 1724 1725 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) 1726 goto out_cant_read; 1727 1728 return &trace->syscalls.table[id]; 1729 1730 out_cant_read: 1731 if (verbose > 0) { 1732 fprintf(trace->output, "Problems reading syscall %d", id); 1733 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) 1734 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1735 fputs(" information\n", trace->output); 1736 } 1737 return NULL; 1738 } 1739 1740 static void thread__update_stats(struct thread_trace *ttrace, 1741 int id, struct perf_sample *sample) 1742 { 1743 struct int_node *inode; 1744 struct stats *stats; 1745 u64 duration = 0; 1746 1747 inode = intlist__findnew(ttrace->syscall_stats, id); 1748 if (inode == NULL) 1749 return; 1750 1751 stats = inode->priv; 1752 if (stats == NULL) { 1753 stats = malloc(sizeof(struct stats)); 1754 if (stats == NULL) 1755 return; 1756 init_stats(stats); 1757 inode->priv = stats; 1758 } 1759 1760 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1761 duration = sample->time - ttrace->entry_time; 1762 1763 update_stats(stats, duration); 1764 } 1765 1766 static int trace__printf_interrupted_entry(struct trace *trace) 1767 { 1768 struct thread_trace *ttrace; 1769 size_t printed; 1770 int len; 1771 1772 if (trace->failure_only || trace->current == NULL) 1773 return 0; 1774 1775 ttrace = thread__priv(trace->current); 1776 1777 if (!ttrace->entry_pending) 1778 return 0; 1779 1780 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1781 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1782 1783 if (len < trace->args_alignment - 4) 1784 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1785 1786 printed += fprintf(trace->output, " ...\n"); 1787 1788 ttrace->entry_pending = false; 1789 ++trace->nr_events_printed; 1790 1791 return printed; 1792 } 1793 1794 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 1795 struct perf_sample *sample, struct thread *thread) 1796 { 1797 int printed = 0; 1798 1799 if (trace->print_sample) { 1800 double ts = (double)sample->time / NSEC_PER_MSEC; 1801 1802 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1803 perf_evsel__name(evsel), ts, 1804 thread__comm_str(thread), 1805 sample->pid, sample->tid, sample->cpu); 1806 } 1807 1808 return printed; 1809 } 1810 1811 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1812 { 1813 void *augmented_args = NULL; 1814 /* 1815 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1816 * and there we get all 6 syscall args plus the tracepoint common fields 1817 * that gets calculated at the start and the syscall_nr (another long). 1818 * So we check if that is the case and if so don't look after the 1819 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1820 * which is fixed. 1821 * 1822 * We'll revisit this later to pass s->args_size to the BPF augmenter 1823 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1824 * copies only what we need for each syscall, like what happens when we 1825 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1826 * traffic to just what is needed for each syscall. 1827 */ 1828 int args_size = raw_augmented_args_size ?: sc->args_size; 1829 1830 *augmented_args_size = sample->raw_size - args_size; 1831 if (*augmented_args_size > 0) 1832 augmented_args = sample->raw_data + args_size; 1833 1834 return augmented_args; 1835 } 1836 1837 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 1838 union perf_event *event __maybe_unused, 1839 struct perf_sample *sample) 1840 { 1841 char *msg; 1842 void *args; 1843 int printed = 0; 1844 struct thread *thread; 1845 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1846 int augmented_args_size = 0; 1847 void *augmented_args = NULL; 1848 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1849 struct thread_trace *ttrace; 1850 1851 if (sc == NULL) 1852 return -1; 1853 1854 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1855 ttrace = thread__trace(thread, trace->output); 1856 if (ttrace == NULL) 1857 goto out_put; 1858 1859 trace__fprintf_sample(trace, evsel, sample, thread); 1860 1861 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1862 1863 if (ttrace->entry_str == NULL) { 1864 ttrace->entry_str = malloc(trace__entry_str_size); 1865 if (!ttrace->entry_str) 1866 goto out_put; 1867 } 1868 1869 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1870 trace__printf_interrupted_entry(trace); 1871 /* 1872 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1873 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1874 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1875 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1876 * so when handling, say the openat syscall, we end up getting 6 args for the 1877 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1878 * thinking that the extra 2 u64 args are the augmented filename, so just check 1879 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1880 */ 1881 if (evsel != trace->syscalls.events.sys_enter) 1882 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1883 ttrace->entry_time = sample->time; 1884 msg = ttrace->entry_str; 1885 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1886 1887 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1888 args, augmented_args, augmented_args_size, trace, thread); 1889 1890 if (sc->is_exit) { 1891 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1892 int alignment = 0; 1893 1894 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 1895 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 1896 if (trace->args_alignment > printed) 1897 alignment = trace->args_alignment - printed; 1898 fprintf(trace->output, "%*s= ?\n", alignment, " "); 1899 } 1900 } else { 1901 ttrace->entry_pending = true; 1902 /* See trace__vfs_getname & trace__sys_exit */ 1903 ttrace->filename.pending_open = false; 1904 } 1905 1906 if (trace->current != thread) { 1907 thread__put(trace->current); 1908 trace->current = thread__get(thread); 1909 } 1910 err = 0; 1911 out_put: 1912 thread__put(thread); 1913 return err; 1914 } 1915 1916 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, 1917 struct perf_sample *sample) 1918 { 1919 struct thread_trace *ttrace; 1920 struct thread *thread; 1921 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1922 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1923 char msg[1024]; 1924 void *args, *augmented_args = NULL; 1925 int augmented_args_size; 1926 1927 if (sc == NULL) 1928 return -1; 1929 1930 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1931 ttrace = thread__trace(thread, trace->output); 1932 /* 1933 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 1934 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 1935 */ 1936 if (ttrace == NULL) 1937 goto out_put; 1938 1939 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1940 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1941 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 1942 fprintf(trace->output, "%s", msg); 1943 err = 0; 1944 out_put: 1945 thread__put(thread); 1946 return err; 1947 } 1948 1949 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, 1950 struct perf_sample *sample, 1951 struct callchain_cursor *cursor) 1952 { 1953 struct addr_location al; 1954 int max_stack = evsel->attr.sample_max_stack ? 1955 evsel->attr.sample_max_stack : 1956 trace->max_stack; 1957 int err; 1958 1959 if (machine__resolve(trace->host, &al, sample) < 0) 1960 return -1; 1961 1962 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 1963 addr_location__put(&al); 1964 return err; 1965 } 1966 1967 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 1968 { 1969 /* TODO: user-configurable print_opts */ 1970 const unsigned int print_opts = EVSEL__PRINT_SYM | 1971 EVSEL__PRINT_DSO | 1972 EVSEL__PRINT_UNKNOWN_AS_ADDR; 1973 1974 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); 1975 } 1976 1977 static const char *errno_to_name(struct perf_evsel *evsel, int err) 1978 { 1979 struct perf_env *env = perf_evsel__env(evsel); 1980 const char *arch_name = perf_env__arch(env); 1981 1982 return arch_syscalls__strerrno(arch_name, err); 1983 } 1984 1985 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 1986 union perf_event *event __maybe_unused, 1987 struct perf_sample *sample) 1988 { 1989 long ret; 1990 u64 duration = 0; 1991 bool duration_calculated = false; 1992 struct thread *thread; 1993 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 1994 int alignment = trace->args_alignment; 1995 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1996 struct thread_trace *ttrace; 1997 1998 if (sc == NULL) 1999 return -1; 2000 2001 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2002 ttrace = thread__trace(thread, trace->output); 2003 if (ttrace == NULL) 2004 goto out_put; 2005 2006 trace__fprintf_sample(trace, evsel, sample, thread); 2007 2008 if (trace->summary) 2009 thread__update_stats(ttrace, id, sample); 2010 2011 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2012 2013 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2014 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2015 ttrace->filename.pending_open = false; 2016 ++trace->stats.vfs_getname; 2017 } 2018 2019 if (ttrace->entry_time) { 2020 duration = sample->time - ttrace->entry_time; 2021 if (trace__filter_duration(trace, duration)) 2022 goto out; 2023 duration_calculated = true; 2024 } else if (trace->duration_filter) 2025 goto out; 2026 2027 if (sample->callchain) { 2028 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2029 if (callchain_ret == 0) { 2030 if (callchain_cursor.nr < trace->min_stack) 2031 goto out; 2032 callchain_ret = 1; 2033 } 2034 } 2035 2036 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2037 goto out; 2038 2039 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2040 2041 if (ttrace->entry_pending) { 2042 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2043 } else { 2044 printed += fprintf(trace->output, " ... ["); 2045 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2046 printed += 9; 2047 printed += fprintf(trace->output, "]: %s()", sc->name); 2048 } 2049 2050 printed++; /* the closing ')' */ 2051 2052 if (alignment > printed) 2053 alignment -= printed; 2054 else 2055 alignment = 0; 2056 2057 fprintf(trace->output, ")%*s= ", alignment, " "); 2058 2059 if (sc->fmt == NULL) { 2060 if (ret < 0) 2061 goto errno_print; 2062 signed_print: 2063 fprintf(trace->output, "%ld", ret); 2064 } else if (ret < 0) { 2065 errno_print: { 2066 char bf[STRERR_BUFSIZE]; 2067 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2068 *e = errno_to_name(evsel, -ret); 2069 2070 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2071 } 2072 } else if (ret == 0 && sc->fmt->timeout) 2073 fprintf(trace->output, "0 (Timeout)"); 2074 else if (ttrace->ret_scnprintf) { 2075 char bf[1024]; 2076 struct syscall_arg arg = { 2077 .val = ret, 2078 .thread = thread, 2079 .trace = trace, 2080 }; 2081 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2082 ttrace->ret_scnprintf = NULL; 2083 fprintf(trace->output, "%s", bf); 2084 } else if (sc->fmt->hexret) 2085 fprintf(trace->output, "%#lx", ret); 2086 else if (sc->fmt->errpid) { 2087 struct thread *child = machine__find_thread(trace->host, ret, ret); 2088 2089 if (child != NULL) { 2090 fprintf(trace->output, "%ld", ret); 2091 if (child->comm_set) 2092 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2093 thread__put(child); 2094 } 2095 } else 2096 goto signed_print; 2097 2098 fputc('\n', trace->output); 2099 2100 /* 2101 * We only consider an 'event' for the sake of --max-events a non-filtered 2102 * sys_enter + sys_exit and other tracepoint events. 2103 */ 2104 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2105 interrupted = true; 2106 2107 if (callchain_ret > 0) 2108 trace__fprintf_callchain(trace, sample); 2109 else if (callchain_ret < 0) 2110 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2111 out: 2112 ttrace->entry_pending = false; 2113 err = 0; 2114 out_put: 2115 thread__put(thread); 2116 return err; 2117 } 2118 2119 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, 2120 union perf_event *event __maybe_unused, 2121 struct perf_sample *sample) 2122 { 2123 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2124 struct thread_trace *ttrace; 2125 size_t filename_len, entry_str_len, to_move; 2126 ssize_t remaining_space; 2127 char *pos; 2128 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2129 2130 if (!thread) 2131 goto out; 2132 2133 ttrace = thread__priv(thread); 2134 if (!ttrace) 2135 goto out_put; 2136 2137 filename_len = strlen(filename); 2138 if (filename_len == 0) 2139 goto out_put; 2140 2141 if (ttrace->filename.namelen < filename_len) { 2142 char *f = realloc(ttrace->filename.name, filename_len + 1); 2143 2144 if (f == NULL) 2145 goto out_put; 2146 2147 ttrace->filename.namelen = filename_len; 2148 ttrace->filename.name = f; 2149 } 2150 2151 strcpy(ttrace->filename.name, filename); 2152 ttrace->filename.pending_open = true; 2153 2154 if (!ttrace->filename.ptr) 2155 goto out_put; 2156 2157 entry_str_len = strlen(ttrace->entry_str); 2158 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2159 if (remaining_space <= 0) 2160 goto out_put; 2161 2162 if (filename_len > (size_t)remaining_space) { 2163 filename += filename_len - remaining_space; 2164 filename_len = remaining_space; 2165 } 2166 2167 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2168 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2169 memmove(pos + filename_len, pos, to_move); 2170 memcpy(pos, filename, filename_len); 2171 2172 ttrace->filename.ptr = 0; 2173 ttrace->filename.entry_str_pos = 0; 2174 out_put: 2175 thread__put(thread); 2176 out: 2177 return 0; 2178 } 2179 2180 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, 2181 union perf_event *event __maybe_unused, 2182 struct perf_sample *sample) 2183 { 2184 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2185 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2186 struct thread *thread = machine__findnew_thread(trace->host, 2187 sample->pid, 2188 sample->tid); 2189 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2190 2191 if (ttrace == NULL) 2192 goto out_dump; 2193 2194 ttrace->runtime_ms += runtime_ms; 2195 trace->runtime_ms += runtime_ms; 2196 out_put: 2197 thread__put(thread); 2198 return 0; 2199 2200 out_dump: 2201 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2202 evsel->name, 2203 perf_evsel__strval(evsel, sample, "comm"), 2204 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2205 runtime, 2206 perf_evsel__intval(evsel, sample, "vruntime")); 2207 goto out_put; 2208 } 2209 2210 static int bpf_output__printer(enum binary_printer_ops op, 2211 unsigned int val, void *extra __maybe_unused, FILE *fp) 2212 { 2213 unsigned char ch = (unsigned char)val; 2214 2215 switch (op) { 2216 case BINARY_PRINT_CHAR_DATA: 2217 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2218 case BINARY_PRINT_DATA_BEGIN: 2219 case BINARY_PRINT_LINE_BEGIN: 2220 case BINARY_PRINT_ADDR: 2221 case BINARY_PRINT_NUM_DATA: 2222 case BINARY_PRINT_NUM_PAD: 2223 case BINARY_PRINT_SEP: 2224 case BINARY_PRINT_CHAR_PAD: 2225 case BINARY_PRINT_LINE_END: 2226 case BINARY_PRINT_DATA_END: 2227 default: 2228 break; 2229 } 2230 2231 return 0; 2232 } 2233 2234 static void bpf_output__fprintf(struct trace *trace, 2235 struct perf_sample *sample) 2236 { 2237 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2238 bpf_output__printer, NULL, trace->output); 2239 ++trace->nr_events_printed; 2240 } 2241 2242 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, 2243 union perf_event *event __maybe_unused, 2244 struct perf_sample *sample) 2245 { 2246 struct thread *thread; 2247 int callchain_ret = 0; 2248 /* 2249 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2250 * this event's max_events having been hit and this is an entry coming 2251 * from the ring buffer that we should discard, since the max events 2252 * have already been considered/printed. 2253 */ 2254 if (evsel->disabled) 2255 return 0; 2256 2257 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2258 2259 if (sample->callchain) { 2260 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2261 if (callchain_ret == 0) { 2262 if (callchain_cursor.nr < trace->min_stack) 2263 goto out; 2264 callchain_ret = 1; 2265 } 2266 } 2267 2268 trace__printf_interrupted_entry(trace); 2269 trace__fprintf_tstamp(trace, sample->time, trace->output); 2270 2271 if (trace->trace_syscalls && trace->show_duration) 2272 fprintf(trace->output, "( ): "); 2273 2274 if (thread) 2275 trace__fprintf_comm_tid(trace, thread, trace->output); 2276 2277 if (evsel == trace->syscalls.events.augmented) { 2278 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2279 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2280 2281 if (sc) { 2282 fprintf(trace->output, "%s(", sc->name); 2283 trace__fprintf_sys_enter(trace, evsel, sample); 2284 fputc(')', trace->output); 2285 goto newline; 2286 } 2287 2288 /* 2289 * XXX: Not having the associated syscall info or not finding/adding 2290 * the thread should never happen, but if it does... 2291 * fall thru and print it as a bpf_output event. 2292 */ 2293 } 2294 2295 fprintf(trace->output, "%s:", evsel->name); 2296 2297 if (perf_evsel__is_bpf_output(evsel)) { 2298 bpf_output__fprintf(trace, sample); 2299 } else if (evsel->tp_format) { 2300 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2301 trace__fprintf_sys_enter(trace, evsel, sample)) { 2302 event_format__fprintf(evsel->tp_format, sample->cpu, 2303 sample->raw_data, sample->raw_size, 2304 trace->output); 2305 ++trace->nr_events_printed; 2306 2307 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2308 perf_evsel__disable(evsel); 2309 perf_evsel__close(evsel); 2310 } 2311 } 2312 } 2313 2314 newline: 2315 fprintf(trace->output, "\n"); 2316 2317 if (callchain_ret > 0) 2318 trace__fprintf_callchain(trace, sample); 2319 else if (callchain_ret < 0) 2320 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2321 out: 2322 thread__put(thread); 2323 return 0; 2324 } 2325 2326 static void print_location(FILE *f, struct perf_sample *sample, 2327 struct addr_location *al, 2328 bool print_dso, bool print_sym) 2329 { 2330 2331 if ((verbose > 0 || print_dso) && al->map) 2332 fprintf(f, "%s@", al->map->dso->long_name); 2333 2334 if ((verbose > 0 || print_sym) && al->sym) 2335 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2336 al->addr - al->sym->start); 2337 else if (al->map) 2338 fprintf(f, "0x%" PRIx64, al->addr); 2339 else 2340 fprintf(f, "0x%" PRIx64, sample->addr); 2341 } 2342 2343 static int trace__pgfault(struct trace *trace, 2344 struct perf_evsel *evsel, 2345 union perf_event *event __maybe_unused, 2346 struct perf_sample *sample) 2347 { 2348 struct thread *thread; 2349 struct addr_location al; 2350 char map_type = 'd'; 2351 struct thread_trace *ttrace; 2352 int err = -1; 2353 int callchain_ret = 0; 2354 2355 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2356 2357 if (sample->callchain) { 2358 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2359 if (callchain_ret == 0) { 2360 if (callchain_cursor.nr < trace->min_stack) 2361 goto out_put; 2362 callchain_ret = 1; 2363 } 2364 } 2365 2366 ttrace = thread__trace(thread, trace->output); 2367 if (ttrace == NULL) 2368 goto out_put; 2369 2370 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2371 ttrace->pfmaj++; 2372 else 2373 ttrace->pfmin++; 2374 2375 if (trace->summary_only) 2376 goto out; 2377 2378 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2379 2380 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2381 2382 fprintf(trace->output, "%sfault [", 2383 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2384 "maj" : "min"); 2385 2386 print_location(trace->output, sample, &al, false, true); 2387 2388 fprintf(trace->output, "] => "); 2389 2390 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2391 2392 if (!al.map) { 2393 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2394 2395 if (al.map) 2396 map_type = 'x'; 2397 else 2398 map_type = '?'; 2399 } 2400 2401 print_location(trace->output, sample, &al, true, false); 2402 2403 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2404 2405 if (callchain_ret > 0) 2406 trace__fprintf_callchain(trace, sample); 2407 else if (callchain_ret < 0) 2408 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2409 2410 ++trace->nr_events_printed; 2411 out: 2412 err = 0; 2413 out_put: 2414 thread__put(thread); 2415 return err; 2416 } 2417 2418 static void trace__set_base_time(struct trace *trace, 2419 struct perf_evsel *evsel, 2420 struct perf_sample *sample) 2421 { 2422 /* 2423 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2424 * and don't use sample->time unconditionally, we may end up having 2425 * some other event in the future without PERF_SAMPLE_TIME for good 2426 * reason, i.e. we may not be interested in its timestamps, just in 2427 * it taking place, picking some piece of information when it 2428 * appears in our event stream (vfs_getname comes to mind). 2429 */ 2430 if (trace->base_time == 0 && !trace->full_time && 2431 (evsel->attr.sample_type & PERF_SAMPLE_TIME)) 2432 trace->base_time = sample->time; 2433 } 2434 2435 static int trace__process_sample(struct perf_tool *tool, 2436 union perf_event *event, 2437 struct perf_sample *sample, 2438 struct perf_evsel *evsel, 2439 struct machine *machine __maybe_unused) 2440 { 2441 struct trace *trace = container_of(tool, struct trace, tool); 2442 struct thread *thread; 2443 int err = 0; 2444 2445 tracepoint_handler handler = evsel->handler; 2446 2447 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2448 if (thread && thread__is_filtered(thread)) 2449 goto out; 2450 2451 trace__set_base_time(trace, evsel, sample); 2452 2453 if (handler) { 2454 ++trace->nr_events; 2455 handler(trace, evsel, event, sample); 2456 } 2457 out: 2458 thread__put(thread); 2459 return err; 2460 } 2461 2462 static int trace__record(struct trace *trace, int argc, const char **argv) 2463 { 2464 unsigned int rec_argc, i, j; 2465 const char **rec_argv; 2466 const char * const record_args[] = { 2467 "record", 2468 "-R", 2469 "-m", "1024", 2470 "-c", "1", 2471 }; 2472 2473 const char * const sc_args[] = { "-e", }; 2474 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2475 const char * const majpf_args[] = { "-e", "major-faults" }; 2476 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2477 const char * const minpf_args[] = { "-e", "minor-faults" }; 2478 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2479 2480 /* +1 is for the event string below */ 2481 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2482 majpf_args_nr + minpf_args_nr + argc; 2483 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2484 2485 if (rec_argv == NULL) 2486 return -ENOMEM; 2487 2488 j = 0; 2489 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2490 rec_argv[j++] = record_args[i]; 2491 2492 if (trace->trace_syscalls) { 2493 for (i = 0; i < sc_args_nr; i++) 2494 rec_argv[j++] = sc_args[i]; 2495 2496 /* event string may be different for older kernels - e.g., RHEL6 */ 2497 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2498 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2499 else if (is_valid_tracepoint("syscalls:sys_enter")) 2500 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2501 else { 2502 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2503 free(rec_argv); 2504 return -1; 2505 } 2506 } 2507 2508 if (trace->trace_pgfaults & TRACE_PFMAJ) 2509 for (i = 0; i < majpf_args_nr; i++) 2510 rec_argv[j++] = majpf_args[i]; 2511 2512 if (trace->trace_pgfaults & TRACE_PFMIN) 2513 for (i = 0; i < minpf_args_nr; i++) 2514 rec_argv[j++] = minpf_args[i]; 2515 2516 for (i = 0; i < (unsigned int)argc; i++) 2517 rec_argv[j++] = argv[i]; 2518 2519 return cmd_record(j, rec_argv); 2520 } 2521 2522 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2523 2524 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) 2525 { 2526 bool found = false; 2527 struct perf_evsel *evsel, *tmp; 2528 struct parse_events_error err = { .idx = 0, }; 2529 int ret = parse_events(evlist, "probe:vfs_getname*", &err); 2530 2531 if (ret) 2532 return false; 2533 2534 evlist__for_each_entry_safe(evlist, evsel, tmp) { 2535 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname")) 2536 continue; 2537 2538 if (perf_evsel__field(evsel, "pathname")) { 2539 evsel->handler = trace__vfs_getname; 2540 found = true; 2541 continue; 2542 } 2543 2544 list_del_init(&evsel->node); 2545 evsel->evlist = NULL; 2546 perf_evsel__delete(evsel); 2547 } 2548 2549 return found; 2550 } 2551 2552 static struct perf_evsel *perf_evsel__new_pgfault(u64 config) 2553 { 2554 struct perf_evsel *evsel; 2555 struct perf_event_attr attr = { 2556 .type = PERF_TYPE_SOFTWARE, 2557 .mmap_data = 1, 2558 }; 2559 2560 attr.config = config; 2561 attr.sample_period = 1; 2562 2563 event_attr_init(&attr); 2564 2565 evsel = perf_evsel__new(&attr); 2566 if (evsel) 2567 evsel->handler = trace__pgfault; 2568 2569 return evsel; 2570 } 2571 2572 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2573 { 2574 const u32 type = event->header.type; 2575 struct perf_evsel *evsel; 2576 2577 if (type != PERF_RECORD_SAMPLE) { 2578 trace__process_event(trace, trace->host, event, sample); 2579 return; 2580 } 2581 2582 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2583 if (evsel == NULL) { 2584 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2585 return; 2586 } 2587 2588 trace__set_base_time(trace, evsel, sample); 2589 2590 if (evsel->attr.type == PERF_TYPE_TRACEPOINT && 2591 sample->raw_data == NULL) { 2592 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2593 perf_evsel__name(evsel), sample->tid, 2594 sample->cpu, sample->raw_size); 2595 } else { 2596 tracepoint_handler handler = evsel->handler; 2597 handler(trace, evsel, event, sample); 2598 } 2599 2600 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2601 interrupted = true; 2602 } 2603 2604 static int trace__add_syscall_newtp(struct trace *trace) 2605 { 2606 int ret = -1; 2607 struct perf_evlist *evlist = trace->evlist; 2608 struct perf_evsel *sys_enter, *sys_exit; 2609 2610 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2611 if (sys_enter == NULL) 2612 goto out; 2613 2614 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2615 goto out_delete_sys_enter; 2616 2617 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2618 if (sys_exit == NULL) 2619 goto out_delete_sys_enter; 2620 2621 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2622 goto out_delete_sys_exit; 2623 2624 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2625 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2626 2627 perf_evlist__add(evlist, sys_enter); 2628 perf_evlist__add(evlist, sys_exit); 2629 2630 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2631 /* 2632 * We're interested only in the user space callchain 2633 * leading to the syscall, allow overriding that for 2634 * debugging reasons using --kernel_syscall_callchains 2635 */ 2636 sys_exit->attr.exclude_callchain_kernel = 1; 2637 } 2638 2639 trace->syscalls.events.sys_enter = sys_enter; 2640 trace->syscalls.events.sys_exit = sys_exit; 2641 2642 ret = 0; 2643 out: 2644 return ret; 2645 2646 out_delete_sys_exit: 2647 perf_evsel__delete_priv(sys_exit); 2648 out_delete_sys_enter: 2649 perf_evsel__delete_priv(sys_enter); 2650 goto out; 2651 } 2652 2653 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2654 { 2655 int err = -1; 2656 struct perf_evsel *sys_exit; 2657 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2658 trace->ev_qualifier_ids.nr, 2659 trace->ev_qualifier_ids.entries); 2660 2661 if (filter == NULL) 2662 goto out_enomem; 2663 2664 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2665 filter)) { 2666 sys_exit = trace->syscalls.events.sys_exit; 2667 err = perf_evsel__append_tp_filter(sys_exit, filter); 2668 } 2669 2670 free(filter); 2671 out: 2672 return err; 2673 out_enomem: 2674 errno = ENOMEM; 2675 goto out; 2676 } 2677 2678 #ifdef HAVE_LIBBPF_SUPPORT 2679 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2680 { 2681 int fd = bpf_map__fd(trace->syscalls.map); 2682 struct bpf_map_syscall_entry value = { 2683 .enabled = !trace->not_ev_qualifier, 2684 }; 2685 int err = 0; 2686 size_t i; 2687 2688 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2689 int key = trace->ev_qualifier_ids.entries[i]; 2690 2691 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2692 if (err) 2693 break; 2694 } 2695 2696 return err; 2697 } 2698 2699 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2700 { 2701 int fd = bpf_map__fd(trace->syscalls.map); 2702 struct bpf_map_syscall_entry value = { 2703 .enabled = enabled, 2704 }; 2705 int err = 0, key; 2706 2707 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2708 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2709 if (err) 2710 break; 2711 } 2712 2713 return err; 2714 } 2715 2716 static int trace__init_syscalls_bpf_map(struct trace *trace) 2717 { 2718 bool enabled = true; 2719 2720 if (trace->ev_qualifier_ids.nr) 2721 enabled = trace->not_ev_qualifier; 2722 2723 return __trace__init_syscalls_bpf_map(trace, enabled); 2724 } 2725 #else 2726 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 2727 { 2728 return 0; 2729 } 2730 2731 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 2732 { 2733 return 0; 2734 } 2735 #endif // HAVE_LIBBPF_SUPPORT 2736 2737 static int trace__set_ev_qualifier_filter(struct trace *trace) 2738 { 2739 if (trace->syscalls.map) 2740 return trace__set_ev_qualifier_bpf_filter(trace); 2741 if (trace->syscalls.events.sys_enter) 2742 return trace__set_ev_qualifier_tp_filter(trace); 2743 return 0; 2744 } 2745 2746 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 2747 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 2748 { 2749 int err = 0; 2750 #ifdef HAVE_LIBBPF_SUPPORT 2751 bool value = true; 2752 int map_fd = bpf_map__fd(map); 2753 size_t i; 2754 2755 for (i = 0; i < npids; ++i) { 2756 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 2757 if (err) 2758 break; 2759 } 2760 #endif 2761 return err; 2762 } 2763 2764 static int trace__set_filter_loop_pids(struct trace *trace) 2765 { 2766 unsigned int nr = 1, err; 2767 pid_t pids[32] = { 2768 getpid(), 2769 }; 2770 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 2771 2772 while (thread && nr < ARRAY_SIZE(pids)) { 2773 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 2774 2775 if (parent == NULL) 2776 break; 2777 2778 if (!strcmp(thread__comm_str(parent), "sshd") || 2779 strstarts(thread__comm_str(parent), "gnome-terminal")) { 2780 pids[nr++] = parent->tid; 2781 break; 2782 } 2783 thread = parent; 2784 } 2785 2786 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 2787 if (!err && trace->filter_pids.map) 2788 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 2789 2790 return err; 2791 } 2792 2793 static int trace__set_filter_pids(struct trace *trace) 2794 { 2795 int err = 0; 2796 /* 2797 * Better not use !target__has_task() here because we need to cover the 2798 * case where no threads were specified in the command line, but a 2799 * workload was, and in that case we will fill in the thread_map when 2800 * we fork the workload in perf_evlist__prepare_workload. 2801 */ 2802 if (trace->filter_pids.nr > 0) { 2803 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 2804 trace->filter_pids.entries); 2805 if (!err && trace->filter_pids.map) { 2806 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 2807 trace->filter_pids.entries); 2808 } 2809 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { 2810 err = trace__set_filter_loop_pids(trace); 2811 } 2812 2813 return err; 2814 } 2815 2816 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 2817 { 2818 struct perf_evlist *evlist = trace->evlist; 2819 struct perf_sample sample; 2820 int err; 2821 2822 err = perf_evlist__parse_sample(evlist, event, &sample); 2823 if (err) 2824 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 2825 else 2826 trace__handle_event(trace, event, &sample); 2827 2828 return 0; 2829 } 2830 2831 static int __trace__flush_events(struct trace *trace) 2832 { 2833 u64 first = ordered_events__first_time(&trace->oe.data); 2834 u64 flush = trace->oe.last - NSEC_PER_SEC; 2835 2836 /* Is there some thing to flush.. */ 2837 if (first && first < flush) 2838 return ordered_events__flush_time(&trace->oe.data, flush); 2839 2840 return 0; 2841 } 2842 2843 static int trace__flush_events(struct trace *trace) 2844 { 2845 return !trace->sort_events ? 0 : __trace__flush_events(trace); 2846 } 2847 2848 static int trace__deliver_event(struct trace *trace, union perf_event *event) 2849 { 2850 int err; 2851 2852 if (!trace->sort_events) 2853 return __trace__deliver_event(trace, event); 2854 2855 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 2856 if (err && err != -1) 2857 return err; 2858 2859 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 2860 if (err) 2861 return err; 2862 2863 return trace__flush_events(trace); 2864 } 2865 2866 static int ordered_events__deliver_event(struct ordered_events *oe, 2867 struct ordered_event *event) 2868 { 2869 struct trace *trace = container_of(oe, struct trace, oe.data); 2870 2871 return __trace__deliver_event(trace, event->event); 2872 } 2873 2874 static int trace__run(struct trace *trace, int argc, const char **argv) 2875 { 2876 struct perf_evlist *evlist = trace->evlist; 2877 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 2878 int err = -1, i; 2879 unsigned long before; 2880 const bool forks = argc > 0; 2881 bool draining = false; 2882 2883 trace->live = true; 2884 2885 if (!trace->raw_augmented_syscalls) { 2886 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 2887 goto out_error_raw_syscalls; 2888 2889 if (trace->trace_syscalls) 2890 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist); 2891 } 2892 2893 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 2894 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 2895 if (pgfault_maj == NULL) 2896 goto out_error_mem; 2897 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 2898 perf_evlist__add(evlist, pgfault_maj); 2899 } 2900 2901 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 2902 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 2903 if (pgfault_min == NULL) 2904 goto out_error_mem; 2905 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 2906 perf_evlist__add(evlist, pgfault_min); 2907 } 2908 2909 if (trace->sched && 2910 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 2911 trace__sched_stat_runtime)) 2912 goto out_error_sched_stat_runtime; 2913 2914 /* 2915 * If a global cgroup was set, apply it to all the events without an 2916 * explicit cgroup. I.e.: 2917 * 2918 * trace -G A -e sched:*switch 2919 * 2920 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 2921 * _and_ sched:sched_switch to the 'A' cgroup, while: 2922 * 2923 * trace -e sched:*switch -G A 2924 * 2925 * will only set the sched:sched_switch event to the 'A' cgroup, all the 2926 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 2927 * a cgroup (on the root cgroup, sys wide, etc). 2928 * 2929 * Multiple cgroups: 2930 * 2931 * trace -G A -e sched:*switch -G B 2932 * 2933 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 2934 * to the 'B' cgroup. 2935 * 2936 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 2937 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 2938 */ 2939 if (trace->cgroup) 2940 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 2941 2942 err = perf_evlist__create_maps(evlist, &trace->opts.target); 2943 if (err < 0) { 2944 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 2945 goto out_delete_evlist; 2946 } 2947 2948 err = trace__symbols_init(trace, evlist); 2949 if (err < 0) { 2950 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 2951 goto out_delete_evlist; 2952 } 2953 2954 perf_evlist__config(evlist, &trace->opts, &callchain_param); 2955 2956 signal(SIGCHLD, sig_handler); 2957 signal(SIGINT, sig_handler); 2958 2959 if (forks) { 2960 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 2961 argv, false, NULL); 2962 if (err < 0) { 2963 fprintf(trace->output, "Couldn't run the workload!\n"); 2964 goto out_delete_evlist; 2965 } 2966 } 2967 2968 err = perf_evlist__open(evlist); 2969 if (err < 0) 2970 goto out_error_open; 2971 2972 err = bpf__apply_obj_config(); 2973 if (err) { 2974 char errbuf[BUFSIZ]; 2975 2976 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 2977 pr_err("ERROR: Apply config to BPF failed: %s\n", 2978 errbuf); 2979 goto out_error_open; 2980 } 2981 2982 err = trace__set_filter_pids(trace); 2983 if (err < 0) 2984 goto out_error_mem; 2985 2986 if (trace->syscalls.map) 2987 trace__init_syscalls_bpf_map(trace); 2988 2989 if (trace->ev_qualifier_ids.nr > 0) { 2990 err = trace__set_ev_qualifier_filter(trace); 2991 if (err < 0) 2992 goto out_errno; 2993 2994 if (trace->syscalls.events.sys_exit) { 2995 pr_debug("event qualifier tracepoint filter: %s\n", 2996 trace->syscalls.events.sys_exit->filter); 2997 } 2998 } 2999 3000 err = perf_evlist__apply_filters(evlist, &evsel); 3001 if (err < 0) 3002 goto out_error_apply_filters; 3003 3004 if (trace->dump.map) 3005 bpf_map__fprintf(trace->dump.map, trace->output); 3006 3007 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); 3008 if (err < 0) 3009 goto out_error_mmap; 3010 3011 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3012 perf_evlist__enable(evlist); 3013 3014 if (forks) 3015 perf_evlist__start_workload(evlist); 3016 3017 if (trace->opts.initial_delay) { 3018 usleep(trace->opts.initial_delay * 1000); 3019 perf_evlist__enable(evlist); 3020 } 3021 3022 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || 3023 evlist->threads->nr > 1 || 3024 perf_evlist__first(evlist)->attr.inherit; 3025 3026 /* 3027 * Now that we already used evsel->attr to ask the kernel to setup the 3028 * events, lets reuse evsel->attr.sample_max_stack as the limit in 3029 * trace__resolve_callchain(), allowing per-event max-stack settings 3030 * to override an explicitly set --max-stack global setting. 3031 */ 3032 evlist__for_each_entry(evlist, evsel) { 3033 if (evsel__has_callchain(evsel) && 3034 evsel->attr.sample_max_stack == 0) 3035 evsel->attr.sample_max_stack = trace->max_stack; 3036 } 3037 again: 3038 before = trace->nr_events; 3039 3040 for (i = 0; i < evlist->nr_mmaps; i++) { 3041 union perf_event *event; 3042 struct perf_mmap *md; 3043 3044 md = &evlist->mmap[i]; 3045 if (perf_mmap__read_init(md) < 0) 3046 continue; 3047 3048 while ((event = perf_mmap__read_event(md)) != NULL) { 3049 ++trace->nr_events; 3050 3051 err = trace__deliver_event(trace, event); 3052 if (err) 3053 goto out_disable; 3054 3055 perf_mmap__consume(md); 3056 3057 if (interrupted) 3058 goto out_disable; 3059 3060 if (done && !draining) { 3061 perf_evlist__disable(evlist); 3062 draining = true; 3063 } 3064 } 3065 perf_mmap__read_done(md); 3066 } 3067 3068 if (trace->nr_events == before) { 3069 int timeout = done ? 100 : -1; 3070 3071 if (!draining && perf_evlist__poll(evlist, timeout) > 0) { 3072 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3073 draining = true; 3074 3075 goto again; 3076 } else { 3077 if (trace__flush_events(trace)) 3078 goto out_disable; 3079 } 3080 } else { 3081 goto again; 3082 } 3083 3084 out_disable: 3085 thread__zput(trace->current); 3086 3087 perf_evlist__disable(evlist); 3088 3089 if (trace->sort_events) 3090 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3091 3092 if (!err) { 3093 if (trace->summary) 3094 trace__fprintf_thread_summary(trace, trace->output); 3095 3096 if (trace->show_tool_stats) { 3097 fprintf(trace->output, "Stats:\n " 3098 " vfs_getname : %" PRIu64 "\n" 3099 " proc_getname: %" PRIu64 "\n", 3100 trace->stats.vfs_getname, 3101 trace->stats.proc_getname); 3102 } 3103 } 3104 3105 out_delete_evlist: 3106 trace__symbols__exit(trace); 3107 3108 perf_evlist__delete(evlist); 3109 cgroup__put(trace->cgroup); 3110 trace->evlist = NULL; 3111 trace->live = false; 3112 return err; 3113 { 3114 char errbuf[BUFSIZ]; 3115 3116 out_error_sched_stat_runtime: 3117 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3118 goto out_error; 3119 3120 out_error_raw_syscalls: 3121 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3122 goto out_error; 3123 3124 out_error_mmap: 3125 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3126 goto out_error; 3127 3128 out_error_open: 3129 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3130 3131 out_error: 3132 fprintf(trace->output, "%s\n", errbuf); 3133 goto out_delete_evlist; 3134 3135 out_error_apply_filters: 3136 fprintf(trace->output, 3137 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3138 evsel->filter, perf_evsel__name(evsel), errno, 3139 str_error_r(errno, errbuf, sizeof(errbuf))); 3140 goto out_delete_evlist; 3141 } 3142 out_error_mem: 3143 fprintf(trace->output, "Not enough memory to run!\n"); 3144 goto out_delete_evlist; 3145 3146 out_errno: 3147 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3148 goto out_delete_evlist; 3149 } 3150 3151 static int trace__replay(struct trace *trace) 3152 { 3153 const struct perf_evsel_str_handler handlers[] = { 3154 { "probe:vfs_getname", trace__vfs_getname, }, 3155 }; 3156 struct perf_data data = { 3157 .path = input_name, 3158 .mode = PERF_DATA_MODE_READ, 3159 .force = trace->force, 3160 }; 3161 struct perf_session *session; 3162 struct perf_evsel *evsel; 3163 int err = -1; 3164 3165 trace->tool.sample = trace__process_sample; 3166 trace->tool.mmap = perf_event__process_mmap; 3167 trace->tool.mmap2 = perf_event__process_mmap2; 3168 trace->tool.comm = perf_event__process_comm; 3169 trace->tool.exit = perf_event__process_exit; 3170 trace->tool.fork = perf_event__process_fork; 3171 trace->tool.attr = perf_event__process_attr; 3172 trace->tool.tracing_data = perf_event__process_tracing_data; 3173 trace->tool.build_id = perf_event__process_build_id; 3174 trace->tool.namespaces = perf_event__process_namespaces; 3175 3176 trace->tool.ordered_events = true; 3177 trace->tool.ordering_requires_timestamps = true; 3178 3179 /* add tid to output */ 3180 trace->multiple_threads = true; 3181 3182 session = perf_session__new(&data, false, &trace->tool); 3183 if (session == NULL) 3184 return -1; 3185 3186 if (trace->opts.target.pid) 3187 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3188 3189 if (trace->opts.target.tid) 3190 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3191 3192 if (symbol__init(&session->header.env) < 0) 3193 goto out; 3194 3195 trace->host = &session->machines.host; 3196 3197 err = perf_session__set_tracepoints_handlers(session, handlers); 3198 if (err) 3199 goto out; 3200 3201 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3202 "raw_syscalls:sys_enter"); 3203 /* older kernels have syscalls tp versus raw_syscalls */ 3204 if (evsel == NULL) 3205 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3206 "syscalls:sys_enter"); 3207 3208 if (evsel && 3209 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3210 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3211 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3212 goto out; 3213 } 3214 3215 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3216 "raw_syscalls:sys_exit"); 3217 if (evsel == NULL) 3218 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3219 "syscalls:sys_exit"); 3220 if (evsel && 3221 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3222 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3223 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3224 goto out; 3225 } 3226 3227 evlist__for_each_entry(session->evlist, evsel) { 3228 if (evsel->attr.type == PERF_TYPE_SOFTWARE && 3229 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3230 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3231 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3232 evsel->handler = trace__pgfault; 3233 } 3234 3235 setup_pager(); 3236 3237 err = perf_session__process_events(session); 3238 if (err) 3239 pr_err("Failed to process events, error %d", err); 3240 3241 else if (trace->summary) 3242 trace__fprintf_thread_summary(trace, trace->output); 3243 3244 out: 3245 perf_session__delete(session); 3246 3247 return err; 3248 } 3249 3250 static size_t trace__fprintf_threads_header(FILE *fp) 3251 { 3252 size_t printed; 3253 3254 printed = fprintf(fp, "\n Summary of events:\n\n"); 3255 3256 return printed; 3257 } 3258 3259 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3260 struct stats *stats; 3261 double msecs; 3262 int syscall; 3263 ) 3264 { 3265 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3266 struct stats *stats = source->priv; 3267 3268 entry->syscall = source->i; 3269 entry->stats = stats; 3270 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3271 } 3272 3273 static size_t thread__dump_stats(struct thread_trace *ttrace, 3274 struct trace *trace, FILE *fp) 3275 { 3276 size_t printed = 0; 3277 struct syscall *sc; 3278 struct rb_node *nd; 3279 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3280 3281 if (syscall_stats == NULL) 3282 return 0; 3283 3284 printed += fprintf(fp, "\n"); 3285 3286 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3287 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3288 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3289 3290 resort_rb__for_each_entry(nd, syscall_stats) { 3291 struct stats *stats = syscall_stats_entry->stats; 3292 if (stats) { 3293 double min = (double)(stats->min) / NSEC_PER_MSEC; 3294 double max = (double)(stats->max) / NSEC_PER_MSEC; 3295 double avg = avg_stats(stats); 3296 double pct; 3297 u64 n = (u64) stats->n; 3298 3299 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3300 avg /= NSEC_PER_MSEC; 3301 3302 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3303 printed += fprintf(fp, " %-15s", sc->name); 3304 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3305 n, syscall_stats_entry->msecs, min, avg); 3306 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3307 } 3308 } 3309 3310 resort_rb__delete(syscall_stats); 3311 printed += fprintf(fp, "\n\n"); 3312 3313 return printed; 3314 } 3315 3316 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3317 { 3318 size_t printed = 0; 3319 struct thread_trace *ttrace = thread__priv(thread); 3320 double ratio; 3321 3322 if (ttrace == NULL) 3323 return 0; 3324 3325 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3326 3327 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3328 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3329 printed += fprintf(fp, "%.1f%%", ratio); 3330 if (ttrace->pfmaj) 3331 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3332 if (ttrace->pfmin) 3333 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3334 if (trace->sched) 3335 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3336 else if (fputc('\n', fp) != EOF) 3337 ++printed; 3338 3339 printed += thread__dump_stats(ttrace, trace, fp); 3340 3341 return printed; 3342 } 3343 3344 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3345 { 3346 return ttrace ? ttrace->nr_events : 0; 3347 } 3348 3349 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3350 struct thread *thread; 3351 ) 3352 { 3353 entry->thread = rb_entry(nd, struct thread, rb_node); 3354 } 3355 3356 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3357 { 3358 size_t printed = trace__fprintf_threads_header(fp); 3359 struct rb_node *nd; 3360 int i; 3361 3362 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3363 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3364 3365 if (threads == NULL) { 3366 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3367 return 0; 3368 } 3369 3370 resort_rb__for_each_entry(nd, threads) 3371 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3372 3373 resort_rb__delete(threads); 3374 } 3375 return printed; 3376 } 3377 3378 static int trace__set_duration(const struct option *opt, const char *str, 3379 int unset __maybe_unused) 3380 { 3381 struct trace *trace = opt->value; 3382 3383 trace->duration_filter = atof(str); 3384 return 0; 3385 } 3386 3387 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3388 int unset __maybe_unused) 3389 { 3390 int ret = -1; 3391 size_t i; 3392 struct trace *trace = opt->value; 3393 /* 3394 * FIXME: introduce a intarray class, plain parse csv and create a 3395 * { int nr, int entries[] } struct... 3396 */ 3397 struct intlist *list = intlist__new(str); 3398 3399 if (list == NULL) 3400 return -1; 3401 3402 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3403 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3404 3405 if (trace->filter_pids.entries == NULL) 3406 goto out; 3407 3408 trace->filter_pids.entries[0] = getpid(); 3409 3410 for (i = 1; i < trace->filter_pids.nr; ++i) 3411 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3412 3413 intlist__delete(list); 3414 ret = 0; 3415 out: 3416 return ret; 3417 } 3418 3419 static int trace__open_output(struct trace *trace, const char *filename) 3420 { 3421 struct stat st; 3422 3423 if (!stat(filename, &st) && st.st_size) { 3424 char oldname[PATH_MAX]; 3425 3426 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3427 unlink(oldname); 3428 rename(filename, oldname); 3429 } 3430 3431 trace->output = fopen(filename, "w"); 3432 3433 return trace->output == NULL ? -errno : 0; 3434 } 3435 3436 static int parse_pagefaults(const struct option *opt, const char *str, 3437 int unset __maybe_unused) 3438 { 3439 int *trace_pgfaults = opt->value; 3440 3441 if (strcmp(str, "all") == 0) 3442 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3443 else if (strcmp(str, "maj") == 0) 3444 *trace_pgfaults |= TRACE_PFMAJ; 3445 else if (strcmp(str, "min") == 0) 3446 *trace_pgfaults |= TRACE_PFMIN; 3447 else 3448 return -1; 3449 3450 return 0; 3451 } 3452 3453 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) 3454 { 3455 struct perf_evsel *evsel; 3456 3457 evlist__for_each_entry(evlist, evsel) 3458 evsel->handler = handler; 3459 } 3460 3461 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) 3462 { 3463 struct perf_evsel *evsel; 3464 3465 evlist__for_each_entry(evlist, evsel) { 3466 if (evsel->priv || !evsel->tp_format) 3467 continue; 3468 3469 if (strcmp(evsel->tp_format->system, "syscalls")) 3470 continue; 3471 3472 if (perf_evsel__init_syscall_tp(evsel)) 3473 return -1; 3474 3475 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3476 struct syscall_tp *sc = evsel->priv; 3477 3478 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3479 return -1; 3480 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3481 struct syscall_tp *sc = evsel->priv; 3482 3483 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3484 return -1; 3485 } 3486 } 3487 3488 return 0; 3489 } 3490 3491 /* 3492 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3493 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3494 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3495 * 3496 * It'd be better to introduce a parse_options() variant that would return a 3497 * list with the terms it didn't match to an event... 3498 */ 3499 static int trace__parse_events_option(const struct option *opt, const char *str, 3500 int unset __maybe_unused) 3501 { 3502 struct trace *trace = (struct trace *)opt->value; 3503 const char *s = str; 3504 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3505 int len = strlen(str) + 1, err = -1, list, idx; 3506 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3507 char group_name[PATH_MAX]; 3508 struct syscall_fmt *fmt; 3509 3510 if (strace_groups_dir == NULL) 3511 return -1; 3512 3513 if (*s == '!') { 3514 ++s; 3515 trace->not_ev_qualifier = true; 3516 } 3517 3518 while (1) { 3519 if ((sep = strchr(s, ',')) != NULL) 3520 *sep = '\0'; 3521 3522 list = 0; 3523 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3524 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3525 list = 1; 3526 goto do_concat; 3527 } 3528 3529 fmt = syscall_fmt__find_by_alias(s); 3530 if (fmt != NULL) { 3531 list = 1; 3532 s = fmt->name; 3533 } else { 3534 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3535 if (access(group_name, R_OK) == 0) 3536 list = 1; 3537 } 3538 do_concat: 3539 if (lists[list]) { 3540 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3541 } else { 3542 lists[list] = malloc(len); 3543 if (lists[list] == NULL) 3544 goto out; 3545 strcpy(lists[list], s); 3546 } 3547 3548 if (!sep) 3549 break; 3550 3551 *sep = ','; 3552 s = sep + 1; 3553 } 3554 3555 if (lists[1] != NULL) { 3556 struct strlist_config slist_config = { 3557 .dirname = strace_groups_dir, 3558 }; 3559 3560 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3561 if (trace->ev_qualifier == NULL) { 3562 fputs("Not enough memory to parse event qualifier", trace->output); 3563 goto out; 3564 } 3565 3566 if (trace__validate_ev_qualifier(trace)) 3567 goto out; 3568 trace->trace_syscalls = true; 3569 } 3570 3571 err = 0; 3572 3573 if (lists[0]) { 3574 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3575 "event selector. use 'perf list' to list available events", 3576 parse_events_option); 3577 err = parse_events_option(&o, lists[0], 0); 3578 } 3579 out: 3580 if (sep) 3581 *sep = ','; 3582 3583 return err; 3584 } 3585 3586 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3587 { 3588 struct trace *trace = opt->value; 3589 3590 if (!list_empty(&trace->evlist->entries)) 3591 return parse_cgroups(opt, str, unset); 3592 3593 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 3594 3595 return 0; 3596 } 3597 3598 static struct bpf_map *bpf__find_map_by_name(const char *name) 3599 { 3600 struct bpf_object *obj, *tmp; 3601 3602 bpf_object__for_each_safe(obj, tmp) { 3603 struct bpf_map *map = bpf_object__find_map_by_name(obj, name); 3604 if (map) 3605 return map; 3606 3607 } 3608 3609 return NULL; 3610 } 3611 3612 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3613 { 3614 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); 3615 } 3616 3617 static void trace__set_bpf_map_syscalls(struct trace *trace) 3618 { 3619 trace->syscalls.map = bpf__find_map_by_name("syscalls"); 3620 } 3621 3622 static int trace__config(const char *var, const char *value, void *arg) 3623 { 3624 struct trace *trace = arg; 3625 int err = 0; 3626 3627 if (!strcmp(var, "trace.add_events")) { 3628 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3629 "event selector. use 'perf list' to list available events", 3630 parse_events_option); 3631 err = parse_events_option(&o, value, 0); 3632 } else if (!strcmp(var, "trace.show_timestamp")) { 3633 trace->show_tstamp = perf_config_bool(var, value); 3634 } else if (!strcmp(var, "trace.show_duration")) { 3635 trace->show_duration = perf_config_bool(var, value); 3636 } else if (!strcmp(var, "trace.show_arg_names")) { 3637 trace->show_arg_names = perf_config_bool(var, value); 3638 if (!trace->show_arg_names) 3639 trace->show_zeros = true; 3640 } else if (!strcmp(var, "trace.show_zeros")) { 3641 bool new_show_zeros = perf_config_bool(var, value); 3642 if (!trace->show_arg_names && !new_show_zeros) { 3643 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 3644 goto out; 3645 } 3646 trace->show_zeros = new_show_zeros; 3647 } else if (!strcmp(var, "trace.show_prefix")) { 3648 trace->show_string_prefix = perf_config_bool(var, value); 3649 } else if (!strcmp(var, "trace.no_inherit")) { 3650 trace->opts.no_inherit = perf_config_bool(var, value); 3651 } else if (!strcmp(var, "trace.args_alignment")) { 3652 int args_alignment = 0; 3653 if (perf_config_int(&args_alignment, var, value) == 0) 3654 trace->args_alignment = args_alignment; 3655 } 3656 out: 3657 return err; 3658 } 3659 3660 int cmd_trace(int argc, const char **argv) 3661 { 3662 const char *trace_usage[] = { 3663 "perf trace [<options>] [<command>]", 3664 "perf trace [<options>] -- <command> [<options>]", 3665 "perf trace record [<options>] [<command>]", 3666 "perf trace record [<options>] -- <command> [<options>]", 3667 NULL 3668 }; 3669 struct trace trace = { 3670 .syscalls = { 3671 . max = -1, 3672 }, 3673 .opts = { 3674 .target = { 3675 .uid = UINT_MAX, 3676 .uses_mmap = true, 3677 }, 3678 .user_freq = UINT_MAX, 3679 .user_interval = ULLONG_MAX, 3680 .no_buffering = true, 3681 .mmap_pages = UINT_MAX, 3682 }, 3683 .output = stderr, 3684 .show_comm = true, 3685 .show_tstamp = true, 3686 .show_duration = true, 3687 .show_arg_names = true, 3688 .args_alignment = 70, 3689 .trace_syscalls = false, 3690 .kernel_syscallchains = false, 3691 .max_stack = UINT_MAX, 3692 .max_events = ULONG_MAX, 3693 }; 3694 const char *map_dump_str = NULL; 3695 const char *output_name = NULL; 3696 const struct option trace_options[] = { 3697 OPT_CALLBACK('e', "event", &trace, "event", 3698 "event/syscall selector. use 'perf list' to list available events", 3699 trace__parse_events_option), 3700 OPT_BOOLEAN(0, "comm", &trace.show_comm, 3701 "show the thread COMM next to its id"), 3702 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 3703 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 3704 trace__parse_events_option), 3705 OPT_STRING('o', "output", &output_name, "file", "output file name"), 3706 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 3707 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 3708 "trace events on existing process id"), 3709 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 3710 "trace events on existing thread id"), 3711 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 3712 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 3713 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 3714 "system-wide collection from all CPUs"), 3715 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 3716 "list of cpus to monitor"), 3717 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 3718 "child tasks do not inherit counters"), 3719 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 3720 "number of mmap data pages", 3721 perf_evlist__parse_mmap_pages), 3722 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 3723 "user to profile"), 3724 OPT_CALLBACK(0, "duration", &trace, "float", 3725 "show only events with duration > N.M ms", 3726 trace__set_duration), 3727 #ifdef HAVE_LIBBPF_SUPPORT 3728 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 3729 #endif 3730 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 3731 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 3732 OPT_BOOLEAN('T', "time", &trace.full_time, 3733 "Show full timestamp, not time relative to first start"), 3734 OPT_BOOLEAN(0, "failure", &trace.failure_only, 3735 "Show only syscalls that failed"), 3736 OPT_BOOLEAN('s', "summary", &trace.summary_only, 3737 "Show only syscall summary with statistics"), 3738 OPT_BOOLEAN('S', "with-summary", &trace.summary, 3739 "Show all syscalls and summary with statistics"), 3740 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 3741 "Trace pagefaults", parse_pagefaults, "maj"), 3742 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 3743 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 3744 OPT_CALLBACK(0, "call-graph", &trace.opts, 3745 "record_mode[,record_size]", record_callchain_help, 3746 &record_parse_callchain_opt), 3747 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 3748 "Show the kernel callchains on the syscall exit path"), 3749 OPT_ULONG(0, "max-events", &trace.max_events, 3750 "Set the maximum number of events to print, exit after that is reached. "), 3751 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 3752 "Set the minimum stack depth when parsing the callchain, " 3753 "anything below the specified depth will be ignored."), 3754 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 3755 "Set the maximum stack depth when parsing the callchain, " 3756 "anything beyond the specified depth will be ignored. " 3757 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 3758 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 3759 "Sort batch of events before processing, use if getting out of order events"), 3760 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 3761 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 3762 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 3763 "per thread proc mmap processing timeout in ms"), 3764 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 3765 trace__parse_cgroups), 3766 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 3767 "ms to wait before starting measurement after program " 3768 "start"), 3769 OPT_END() 3770 }; 3771 bool __maybe_unused max_stack_user_set = true; 3772 bool mmap_pages_user_set = true; 3773 struct perf_evsel *evsel; 3774 const char * const trace_subcommands[] = { "record", NULL }; 3775 int err = -1; 3776 char bf[BUFSIZ]; 3777 3778 signal(SIGSEGV, sighandler_dump_stack); 3779 signal(SIGFPE, sighandler_dump_stack); 3780 3781 trace.evlist = perf_evlist__new(); 3782 trace.sctbl = syscalltbl__new(); 3783 3784 if (trace.evlist == NULL || trace.sctbl == NULL) { 3785 pr_err("Not enough memory to run!\n"); 3786 err = -ENOMEM; 3787 goto out; 3788 } 3789 3790 err = perf_config(trace__config, &trace); 3791 if (err) 3792 goto out; 3793 3794 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 3795 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 3796 3797 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 3798 usage_with_options_msg(trace_usage, trace_options, 3799 "cgroup monitoring only available in system-wide mode"); 3800 } 3801 3802 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 3803 if (IS_ERR(evsel)) { 3804 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 3805 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 3806 goto out; 3807 } 3808 3809 if (evsel) { 3810 trace.syscalls.events.augmented = evsel; 3811 trace__set_bpf_map_filtered_pids(&trace); 3812 trace__set_bpf_map_syscalls(&trace); 3813 } 3814 3815 err = bpf__setup_stdout(trace.evlist); 3816 if (err) { 3817 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 3818 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 3819 goto out; 3820 } 3821 3822 err = -1; 3823 3824 if (map_dump_str) { 3825 trace.dump.map = bpf__find_map_by_name(map_dump_str); 3826 if (trace.dump.map == NULL) { 3827 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 3828 goto out; 3829 } 3830 } 3831 3832 if (trace.trace_pgfaults) { 3833 trace.opts.sample_address = true; 3834 trace.opts.sample_time = true; 3835 } 3836 3837 if (trace.opts.mmap_pages == UINT_MAX) 3838 mmap_pages_user_set = false; 3839 3840 if (trace.max_stack == UINT_MAX) { 3841 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 3842 max_stack_user_set = false; 3843 } 3844 3845 #ifdef HAVE_DWARF_UNWIND_SUPPORT 3846 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 3847 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 3848 } 3849 #endif 3850 3851 if (callchain_param.enabled) { 3852 if (!mmap_pages_user_set && geteuid() == 0) 3853 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 3854 3855 symbol_conf.use_callchain = true; 3856 } 3857 3858 if (trace.evlist->nr_entries > 0) { 3859 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 3860 if (evlist__set_syscall_tp_fields(trace.evlist)) { 3861 perror("failed to set syscalls:* tracepoint fields"); 3862 goto out; 3863 } 3864 } 3865 3866 if (trace.sort_events) { 3867 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 3868 ordered_events__set_copy_on_queue(&trace.oe.data, true); 3869 } 3870 3871 /* 3872 * If we are augmenting syscalls, then combine what we put in the 3873 * __augmented_syscalls__ BPF map with what is in the 3874 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 3875 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 3876 * 3877 * We'll switch to look at two BPF maps, one for sys_enter and the 3878 * other for sys_exit when we start augmenting the sys_exit paths with 3879 * buffers that are being copied from kernel to userspace, think 'read' 3880 * syscall. 3881 */ 3882 if (trace.syscalls.events.augmented) { 3883 evlist__for_each_entry(trace.evlist, evsel) { 3884 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 3885 3886 if (raw_syscalls_sys_exit) { 3887 trace.raw_augmented_syscalls = true; 3888 goto init_augmented_syscall_tp; 3889 } 3890 3891 if (trace.syscalls.events.augmented->priv == NULL && 3892 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) { 3893 struct perf_evsel *augmented = trace.syscalls.events.augmented; 3894 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 3895 perf_evsel__init_augmented_syscall_tp_args(augmented)) 3896 goto out; 3897 augmented->handler = trace__sys_enter; 3898 } 3899 3900 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 3901 struct syscall_tp *sc; 3902 init_augmented_syscall_tp: 3903 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 3904 goto out; 3905 sc = evsel->priv; 3906 /* 3907 * For now with BPF raw_augmented we hook into 3908 * raw_syscalls:sys_enter and there we get all 3909 * 6 syscall args plus the tracepoint common 3910 * fields and the syscall_nr (another long). 3911 * So we check if that is the case and if so 3912 * don't look after the sc->args_size but 3913 * always after the full raw_syscalls:sys_enter 3914 * payload, which is fixed. 3915 * 3916 * We'll revisit this later to pass 3917 * s->args_size to the BPF augmenter (now 3918 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 3919 * so that it copies only what we need for each 3920 * syscall, like what happens when we use 3921 * syscalls:sys_enter_NAME, so that we reduce 3922 * the kernel/userspace traffic to just what is 3923 * needed for each syscall. 3924 */ 3925 if (trace.raw_augmented_syscalls) 3926 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 3927 perf_evsel__init_augmented_syscall_tp_ret(evsel); 3928 evsel->handler = trace__sys_exit; 3929 } 3930 } 3931 } 3932 3933 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 3934 return trace__record(&trace, argc-1, &argv[1]); 3935 3936 /* summary_only implies summary option, but don't overwrite summary if set */ 3937 if (trace.summary_only) 3938 trace.summary = trace.summary_only; 3939 3940 if (!trace.trace_syscalls && !trace.trace_pgfaults && 3941 trace.evlist->nr_entries == 0 /* Was --events used? */) { 3942 trace.trace_syscalls = true; 3943 } 3944 3945 if (output_name != NULL) { 3946 err = trace__open_output(&trace, output_name); 3947 if (err < 0) { 3948 perror("failed to create output file"); 3949 goto out; 3950 } 3951 } 3952 3953 err = target__validate(&trace.opts.target); 3954 if (err) { 3955 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3956 fprintf(trace.output, "%s", bf); 3957 goto out_close; 3958 } 3959 3960 err = target__parse_uid(&trace.opts.target); 3961 if (err) { 3962 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 3963 fprintf(trace.output, "%s", bf); 3964 goto out_close; 3965 } 3966 3967 if (!argc && target__none(&trace.opts.target)) 3968 trace.opts.target.system_wide = true; 3969 3970 if (input_name) 3971 err = trace__replay(&trace); 3972 else 3973 err = trace__run(&trace, argc, argv); 3974 3975 out_close: 3976 if (output_name != NULL) 3977 fclose(trace.output); 3978 out: 3979 return err; 3980 } 3981