1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * builtin-trace.c 4 * 5 * Builtin 'trace' command: 6 * 7 * Display a continuously updated trace of any workload, CPU, specific PID, 8 * system wide, etc. Default format is loosely strace like, but any other 9 * event may be specified using --event. 10 * 11 * Copyright (C) 2012, 2013, 2014, 2015 Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 12 * 13 * Initially based on the 'trace' prototype by Thomas Gleixner: 14 * 15 * http://lwn.net/Articles/415728/ ("Announcing a new utility: 'trace'") 16 */ 17 18 #include <traceevent/event-parse.h> 19 #include <api/fs/tracing_path.h> 20 #include <bpf/bpf.h> 21 #include "util/bpf_map.h" 22 #include "builtin.h" 23 #include "util/cgroup.h" 24 #include "util/color.h" 25 #include "util/config.h" 26 #include "util/debug.h" 27 #include "util/env.h" 28 #include "util/event.h" 29 #include "util/evlist.h" 30 #include <subcmd/exec-cmd.h> 31 #include "util/machine.h" 32 #include "util/map.h" 33 #include "util/symbol.h" 34 #include "util/path.h" 35 #include "util/session.h" 36 #include "util/thread.h" 37 #include <subcmd/parse-options.h> 38 #include "util/strlist.h" 39 #include "util/intlist.h" 40 #include "util/thread_map.h" 41 #include "util/stat.h" 42 #include "trace/beauty/beauty.h" 43 #include "trace-event.h" 44 #include "util/parse-events.h" 45 #include "util/bpf-loader.h" 46 #include "callchain.h" 47 #include "print_binary.h" 48 #include "string2.h" 49 #include "syscalltbl.h" 50 #include "rb_resort.h" 51 52 #include <errno.h> 53 #include <inttypes.h> 54 #include <poll.h> 55 #include <signal.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <linux/err.h> 59 #include <linux/filter.h> 60 #include <linux/kernel.h> 61 #include <linux/random.h> 62 #include <linux/stringify.h> 63 #include <linux/time64.h> 64 #include <linux/zalloc.h> 65 #include <fcntl.h> 66 #include <sys/sysmacros.h> 67 68 #include <linux/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 syscall_arg__scnprintf_strarray_flags(char *bf, size_t size, struct syscall_arg *arg) 407 { 408 return strarray__scnprintf_flags(arg->parm, bf, size, arg->show_string_prefix, arg->val); 409 } 410 411 size_t strarrays__scnprintf(struct strarrays *sas, char *bf, size_t size, const char *intfmt, bool show_prefix, int val) 412 { 413 size_t printed; 414 int i; 415 416 for (i = 0; i < sas->nr_entries; ++i) { 417 struct strarray *sa = sas->entries[i]; 418 int idx = val - sa->offset; 419 420 if (idx >= 0 && idx < sa->nr_entries) { 421 if (sa->entries[idx] == NULL) 422 break; 423 return scnprintf(bf, size, "%s%s", show_prefix ? sa->prefix : "", sa->entries[idx]); 424 } 425 } 426 427 printed = scnprintf(bf, size, intfmt, val); 428 if (show_prefix) 429 printed += scnprintf(bf + printed, size - printed, " /* %s??? */", sas->entries[0]->prefix); 430 return printed; 431 } 432 433 size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, 434 struct syscall_arg *arg) 435 { 436 return strarrays__scnprintf(arg->parm, bf, size, "%d", arg->show_string_prefix, arg->val); 437 } 438 439 #ifndef AT_FDCWD 440 #define AT_FDCWD -100 441 #endif 442 443 static size_t syscall_arg__scnprintf_fd_at(char *bf, size_t size, 444 struct syscall_arg *arg) 445 { 446 int fd = arg->val; 447 const char *prefix = "AT_FD"; 448 449 if (fd == AT_FDCWD) 450 return scnprintf(bf, size, "%s%s", arg->show_string_prefix ? prefix : "", "CWD"); 451 452 return syscall_arg__scnprintf_fd(bf, size, arg); 453 } 454 455 #define SCA_FDAT syscall_arg__scnprintf_fd_at 456 457 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 458 struct syscall_arg *arg); 459 460 #define SCA_CLOSE_FD syscall_arg__scnprintf_close_fd 461 462 size_t syscall_arg__scnprintf_hex(char *bf, size_t size, struct syscall_arg *arg) 463 { 464 return scnprintf(bf, size, "%#lx", arg->val); 465 } 466 467 size_t syscall_arg__scnprintf_ptr(char *bf, size_t size, struct syscall_arg *arg) 468 { 469 if (arg->val == 0) 470 return scnprintf(bf, size, "NULL"); 471 return syscall_arg__scnprintf_hex(bf, size, arg); 472 } 473 474 size_t syscall_arg__scnprintf_int(char *bf, size_t size, struct syscall_arg *arg) 475 { 476 return scnprintf(bf, size, "%d", arg->val); 477 } 478 479 size_t syscall_arg__scnprintf_long(char *bf, size_t size, struct syscall_arg *arg) 480 { 481 return scnprintf(bf, size, "%ld", arg->val); 482 } 483 484 static const char *bpf_cmd[] = { 485 "MAP_CREATE", "MAP_LOOKUP_ELEM", "MAP_UPDATE_ELEM", "MAP_DELETE_ELEM", 486 "MAP_GET_NEXT_KEY", "PROG_LOAD", 487 }; 488 static DEFINE_STRARRAY(bpf_cmd, "BPF_"); 489 490 static const char *fsmount_flags[] = { 491 [1] = "CLOEXEC", 492 }; 493 static DEFINE_STRARRAY(fsmount_flags, "FSMOUNT_"); 494 495 #include "trace/beauty/generated/fsconfig_arrays.c" 496 497 static DEFINE_STRARRAY(fsconfig_cmds, "FSCONFIG_"); 498 499 static const char *epoll_ctl_ops[] = { "ADD", "DEL", "MOD", }; 500 static DEFINE_STRARRAY_OFFSET(epoll_ctl_ops, "EPOLL_CTL_", 1); 501 502 static const char *itimers[] = { "REAL", "VIRTUAL", "PROF", }; 503 static DEFINE_STRARRAY(itimers, "ITIMER_"); 504 505 static const char *keyctl_options[] = { 506 "GET_KEYRING_ID", "JOIN_SESSION_KEYRING", "UPDATE", "REVOKE", "CHOWN", 507 "SETPERM", "DESCRIBE", "CLEAR", "LINK", "UNLINK", "SEARCH", "READ", 508 "INSTANTIATE", "NEGATE", "SET_REQKEY_KEYRING", "SET_TIMEOUT", 509 "ASSUME_AUTHORITY", "GET_SECURITY", "SESSION_TO_PARENT", "REJECT", 510 "INSTANTIATE_IOV", "INVALIDATE", "GET_PERSISTENT", 511 }; 512 static DEFINE_STRARRAY(keyctl_options, "KEYCTL_"); 513 514 static const char *whences[] = { "SET", "CUR", "END", 515 #ifdef SEEK_DATA 516 "DATA", 517 #endif 518 #ifdef SEEK_HOLE 519 "HOLE", 520 #endif 521 }; 522 static DEFINE_STRARRAY(whences, "SEEK_"); 523 524 static const char *fcntl_cmds[] = { 525 "DUPFD", "GETFD", "SETFD", "GETFL", "SETFL", "GETLK", "SETLK", 526 "SETLKW", "SETOWN", "GETOWN", "SETSIG", "GETSIG", "GETLK64", 527 "SETLK64", "SETLKW64", "SETOWN_EX", "GETOWN_EX", 528 "GETOWNER_UIDS", 529 }; 530 static DEFINE_STRARRAY(fcntl_cmds, "F_"); 531 532 static const char *fcntl_linux_specific_cmds[] = { 533 "SETLEASE", "GETLEASE", "NOTIFY", [5] = "CANCELLK", "DUPFD_CLOEXEC", 534 "SETPIPE_SZ", "GETPIPE_SZ", "ADD_SEALS", "GET_SEALS", 535 "GET_RW_HINT", "SET_RW_HINT", "GET_FILE_RW_HINT", "SET_FILE_RW_HINT", 536 }; 537 538 static DEFINE_STRARRAY_OFFSET(fcntl_linux_specific_cmds, "F_", F_LINUX_SPECIFIC_BASE); 539 540 static struct strarray *fcntl_cmds_arrays[] = { 541 &strarray__fcntl_cmds, 542 &strarray__fcntl_linux_specific_cmds, 543 }; 544 545 static DEFINE_STRARRAYS(fcntl_cmds_arrays); 546 547 static const char *rlimit_resources[] = { 548 "CPU", "FSIZE", "DATA", "STACK", "CORE", "RSS", "NPROC", "NOFILE", 549 "MEMLOCK", "AS", "LOCKS", "SIGPENDING", "MSGQUEUE", "NICE", "RTPRIO", 550 "RTTIME", 551 }; 552 static DEFINE_STRARRAY(rlimit_resources, "RLIMIT_"); 553 554 static const char *sighow[] = { "BLOCK", "UNBLOCK", "SETMASK", }; 555 static DEFINE_STRARRAY(sighow, "SIG_"); 556 557 static const char *clockid[] = { 558 "REALTIME", "MONOTONIC", "PROCESS_CPUTIME_ID", "THREAD_CPUTIME_ID", 559 "MONOTONIC_RAW", "REALTIME_COARSE", "MONOTONIC_COARSE", "BOOTTIME", 560 "REALTIME_ALARM", "BOOTTIME_ALARM", "SGI_CYCLE", "TAI" 561 }; 562 static DEFINE_STRARRAY(clockid, "CLOCK_"); 563 564 static size_t syscall_arg__scnprintf_access_mode(char *bf, size_t size, 565 struct syscall_arg *arg) 566 { 567 bool show_prefix = arg->show_string_prefix; 568 const char *suffix = "_OK"; 569 size_t printed = 0; 570 int mode = arg->val; 571 572 if (mode == F_OK) /* 0 */ 573 return scnprintf(bf, size, "F%s", show_prefix ? suffix : ""); 574 #define P_MODE(n) \ 575 if (mode & n##_OK) { \ 576 printed += scnprintf(bf + printed, size - printed, "%s%s", #n, show_prefix ? suffix : ""); \ 577 mode &= ~n##_OK; \ 578 } 579 580 P_MODE(R); 581 P_MODE(W); 582 P_MODE(X); 583 #undef P_MODE 584 585 if (mode) 586 printed += scnprintf(bf + printed, size - printed, "|%#x", mode); 587 588 return printed; 589 } 590 591 #define SCA_ACCMODE syscall_arg__scnprintf_access_mode 592 593 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 594 struct syscall_arg *arg); 595 596 #define SCA_FILENAME syscall_arg__scnprintf_filename 597 598 static size_t syscall_arg__scnprintf_pipe_flags(char *bf, size_t size, 599 struct syscall_arg *arg) 600 { 601 bool show_prefix = arg->show_string_prefix; 602 const char *prefix = "O_"; 603 int printed = 0, flags = arg->val; 604 605 #define P_FLAG(n) \ 606 if (flags & O_##n) { \ 607 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 608 flags &= ~O_##n; \ 609 } 610 611 P_FLAG(CLOEXEC); 612 P_FLAG(NONBLOCK); 613 #undef P_FLAG 614 615 if (flags) 616 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 617 618 return printed; 619 } 620 621 #define SCA_PIPE_FLAGS syscall_arg__scnprintf_pipe_flags 622 623 #ifndef GRND_NONBLOCK 624 #define GRND_NONBLOCK 0x0001 625 #endif 626 #ifndef GRND_RANDOM 627 #define GRND_RANDOM 0x0002 628 #endif 629 630 static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size, 631 struct syscall_arg *arg) 632 { 633 bool show_prefix = arg->show_string_prefix; 634 const char *prefix = "GRND_"; 635 int printed = 0, flags = arg->val; 636 637 #define P_FLAG(n) \ 638 if (flags & GRND_##n) { \ 639 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \ 640 flags &= ~GRND_##n; \ 641 } 642 643 P_FLAG(RANDOM); 644 P_FLAG(NONBLOCK); 645 #undef P_FLAG 646 647 if (flags) 648 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags); 649 650 return printed; 651 } 652 653 #define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags 654 655 #define STRARRAY(name, array) \ 656 { .scnprintf = SCA_STRARRAY, \ 657 .parm = &strarray__##array, } 658 659 #define STRARRAY_FLAGS(name, array) \ 660 { .scnprintf = SCA_STRARRAY_FLAGS, \ 661 .parm = &strarray__##array, } 662 663 #include "trace/beauty/arch_errno_names.c" 664 #include "trace/beauty/eventfd.c" 665 #include "trace/beauty/futex_op.c" 666 #include "trace/beauty/futex_val3.c" 667 #include "trace/beauty/mmap.c" 668 #include "trace/beauty/mode_t.c" 669 #include "trace/beauty/msg_flags.c" 670 #include "trace/beauty/open_flags.c" 671 #include "trace/beauty/perf_event_open.c" 672 #include "trace/beauty/pid.c" 673 #include "trace/beauty/sched_policy.c" 674 #include "trace/beauty/seccomp.c" 675 #include "trace/beauty/signum.c" 676 #include "trace/beauty/socket_type.c" 677 #include "trace/beauty/waitid_options.c" 678 679 struct syscall_arg_fmt { 680 size_t (*scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 681 unsigned long (*mask_val)(struct syscall_arg *arg, unsigned long val); 682 void *parm; 683 const char *name; 684 bool show_zero; 685 }; 686 687 static struct syscall_fmt { 688 const char *name; 689 const char *alias; 690 struct syscall_arg_fmt arg[6]; 691 u8 nr_args; 692 bool errpid; 693 bool timeout; 694 bool hexret; 695 } syscall_fmts[] = { 696 { .name = "access", 697 .arg = { [1] = { .scnprintf = SCA_ACCMODE, /* mode */ }, }, }, 698 { .name = "arch_prctl", 699 .arg = { [0] = { .scnprintf = SCA_X86_ARCH_PRCTL_CODE, /* code */ }, 700 [1] = { .scnprintf = SCA_PTR, /* arg2 */ }, }, }, 701 { .name = "bind", 702 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* umyaddr */ }, }, }, 703 { .name = "bpf", 704 .arg = { [0] = STRARRAY(cmd, bpf_cmd), }, }, 705 { .name = "brk", .hexret = true, 706 .arg = { [0] = { .scnprintf = SCA_PTR, /* brk */ }, }, }, 707 { .name = "clock_gettime", 708 .arg = { [0] = STRARRAY(clk_id, clockid), }, }, 709 { .name = "clone", .errpid = true, .nr_args = 5, 710 .arg = { [0] = { .name = "flags", .scnprintf = SCA_CLONE_FLAGS, }, 711 [1] = { .name = "child_stack", .scnprintf = SCA_HEX, }, 712 [2] = { .name = "parent_tidptr", .scnprintf = SCA_HEX, }, 713 [3] = { .name = "child_tidptr", .scnprintf = SCA_HEX, }, 714 [4] = { .name = "tls", .scnprintf = SCA_HEX, }, }, }, 715 { .name = "close", 716 .arg = { [0] = { .scnprintf = SCA_CLOSE_FD, /* fd */ }, }, }, 717 { .name = "connect", 718 .arg = { [1] = { .scnprintf = SCA_SOCKADDR, /* servaddr */ }, }, }, 719 { .name = "epoll_ctl", 720 .arg = { [1] = STRARRAY(op, epoll_ctl_ops), }, }, 721 { .name = "eventfd2", 722 .arg = { [1] = { .scnprintf = SCA_EFD_FLAGS, /* flags */ }, }, }, 723 { .name = "fchmodat", 724 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 725 { .name = "fchownat", 726 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 727 { .name = "fcntl", 728 .arg = { [1] = { .scnprintf = SCA_FCNTL_CMD, /* cmd */ 729 .parm = &strarrays__fcntl_cmds_arrays, 730 .show_zero = true, }, 731 [2] = { .scnprintf = SCA_FCNTL_ARG, /* arg */ }, }, }, 732 { .name = "flock", 733 .arg = { [1] = { .scnprintf = SCA_FLOCK, /* cmd */ }, }, }, 734 { .name = "fsconfig", 735 .arg = { [1] = STRARRAY(cmd, fsconfig_cmds), }, }, 736 { .name = "fsmount", 737 .arg = { [1] = STRARRAY_FLAGS(flags, fsmount_flags), 738 [2] = { .scnprintf = SCA_FSMOUNT_ATTR_FLAGS, /* attr_flags */ }, }, }, 739 { .name = "fspick", 740 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 741 [1] = { .scnprintf = SCA_FILENAME, /* path */ }, 742 [2] = { .scnprintf = SCA_FSPICK_FLAGS, /* flags */ }, }, }, 743 { .name = "fstat", .alias = "newfstat", }, 744 { .name = "fstatat", .alias = "newfstatat", }, 745 { .name = "futex", 746 .arg = { [1] = { .scnprintf = SCA_FUTEX_OP, /* op */ }, 747 [5] = { .scnprintf = SCA_FUTEX_VAL3, /* val3 */ }, }, }, 748 { .name = "futimesat", 749 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 750 { .name = "getitimer", 751 .arg = { [0] = STRARRAY(which, itimers), }, }, 752 { .name = "getpid", .errpid = true, }, 753 { .name = "getpgid", .errpid = true, }, 754 { .name = "getppid", .errpid = true, }, 755 { .name = "getrandom", 756 .arg = { [2] = { .scnprintf = SCA_GETRANDOM_FLAGS, /* flags */ }, }, }, 757 { .name = "getrlimit", 758 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 759 { .name = "gettid", .errpid = true, }, 760 { .name = "ioctl", 761 .arg = { 762 #if defined(__i386__) || defined(__x86_64__) 763 /* 764 * FIXME: Make this available to all arches. 765 */ 766 [1] = { .scnprintf = SCA_IOCTL_CMD, /* cmd */ }, 767 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 768 #else 769 [2] = { .scnprintf = SCA_HEX, /* arg */ }, }, }, 770 #endif 771 { .name = "kcmp", .nr_args = 5, 772 .arg = { [0] = { .name = "pid1", .scnprintf = SCA_PID, }, 773 [1] = { .name = "pid2", .scnprintf = SCA_PID, }, 774 [2] = { .name = "type", .scnprintf = SCA_KCMP_TYPE, }, 775 [3] = { .name = "idx1", .scnprintf = SCA_KCMP_IDX, }, 776 [4] = { .name = "idx2", .scnprintf = SCA_KCMP_IDX, }, }, }, 777 { .name = "keyctl", 778 .arg = { [0] = STRARRAY(option, keyctl_options), }, }, 779 { .name = "kill", 780 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 781 { .name = "linkat", 782 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 783 { .name = "lseek", 784 .arg = { [2] = STRARRAY(whence, whences), }, }, 785 { .name = "lstat", .alias = "newlstat", }, 786 { .name = "madvise", 787 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 788 [2] = { .scnprintf = SCA_MADV_BHV, /* behavior */ }, }, }, 789 { .name = "mkdirat", 790 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 791 { .name = "mknodat", 792 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fd */ }, }, }, 793 { .name = "mmap", .hexret = true, 794 /* The standard mmap maps to old_mmap on s390x */ 795 #if defined(__s390x__) 796 .alias = "old_mmap", 797 #endif 798 .arg = { [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 799 [3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, 800 [5] = { .scnprintf = SCA_HEX, /* offset */ }, }, }, 801 { .name = "mount", 802 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ }, 803 [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */ 804 .mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, }, 805 { .name = "move_mount", 806 .arg = { [0] = { .scnprintf = SCA_FDAT, /* from_dfd */ }, 807 [1] = { .scnprintf = SCA_FILENAME, /* from_pathname */ }, 808 [2] = { .scnprintf = SCA_FDAT, /* to_dfd */ }, 809 [3] = { .scnprintf = SCA_FILENAME, /* to_pathname */ }, 810 [4] = { .scnprintf = SCA_MOVE_MOUNT_FLAGS, /* flags */ }, }, }, 811 { .name = "mprotect", 812 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 813 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, }, }, 814 { .name = "mq_unlink", 815 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* u_name */ }, }, }, 816 { .name = "mremap", .hexret = true, 817 .arg = { [3] = { .scnprintf = SCA_MREMAP_FLAGS, /* flags */ }, }, }, 818 { .name = "name_to_handle_at", 819 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 820 { .name = "newfstatat", 821 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 822 { .name = "open", 823 .arg = { [1] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 824 { .name = "open_by_handle_at", 825 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 826 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 827 { .name = "openat", 828 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, 829 [2] = { .scnprintf = SCA_OPEN_FLAGS, /* flags */ }, }, }, 830 { .name = "perf_event_open", 831 .arg = { [2] = { .scnprintf = SCA_INT, /* cpu */ }, 832 [3] = { .scnprintf = SCA_FD, /* group_fd */ }, 833 [4] = { .scnprintf = SCA_PERF_FLAGS, /* flags */ }, }, }, 834 { .name = "pipe2", 835 .arg = { [1] = { .scnprintf = SCA_PIPE_FLAGS, /* flags */ }, }, }, 836 { .name = "pkey_alloc", 837 .arg = { [1] = { .scnprintf = SCA_PKEY_ALLOC_ACCESS_RIGHTS, /* access_rights */ }, }, }, 838 { .name = "pkey_free", 839 .arg = { [0] = { .scnprintf = SCA_INT, /* key */ }, }, }, 840 { .name = "pkey_mprotect", 841 .arg = { [0] = { .scnprintf = SCA_HEX, /* start */ }, 842 [2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ }, 843 [3] = { .scnprintf = SCA_INT, /* pkey */ }, }, }, 844 { .name = "poll", .timeout = true, }, 845 { .name = "ppoll", .timeout = true, }, 846 { .name = "prctl", 847 .arg = { [0] = { .scnprintf = SCA_PRCTL_OPTION, /* option */ }, 848 [1] = { .scnprintf = SCA_PRCTL_ARG2, /* arg2 */ }, 849 [2] = { .scnprintf = SCA_PRCTL_ARG3, /* arg3 */ }, }, }, 850 { .name = "pread", .alias = "pread64", }, 851 { .name = "preadv", .alias = "pread", }, 852 { .name = "prlimit64", 853 .arg = { [1] = STRARRAY(resource, rlimit_resources), }, }, 854 { .name = "pwrite", .alias = "pwrite64", }, 855 { .name = "readlinkat", 856 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 857 { .name = "recvfrom", 858 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 859 { .name = "recvmmsg", 860 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 861 { .name = "recvmsg", 862 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 863 { .name = "renameat", 864 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 865 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, }, }, 866 { .name = "renameat2", 867 .arg = { [0] = { .scnprintf = SCA_FDAT, /* olddirfd */ }, 868 [2] = { .scnprintf = SCA_FDAT, /* newdirfd */ }, 869 [4] = { .scnprintf = SCA_RENAMEAT2_FLAGS, /* flags */ }, }, }, 870 { .name = "rt_sigaction", 871 .arg = { [0] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 872 { .name = "rt_sigprocmask", 873 .arg = { [0] = STRARRAY(how, sighow), }, }, 874 { .name = "rt_sigqueueinfo", 875 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 876 { .name = "rt_tgsigqueueinfo", 877 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 878 { .name = "sched_setscheduler", 879 .arg = { [1] = { .scnprintf = SCA_SCHED_POLICY, /* policy */ }, }, }, 880 { .name = "seccomp", 881 .arg = { [0] = { .scnprintf = SCA_SECCOMP_OP, /* op */ }, 882 [1] = { .scnprintf = SCA_SECCOMP_FLAGS, /* flags */ }, }, }, 883 { .name = "select", .timeout = true, }, 884 { .name = "sendmmsg", 885 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 886 { .name = "sendmsg", 887 .arg = { [2] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, }, }, 888 { .name = "sendto", 889 .arg = { [3] = { .scnprintf = SCA_MSG_FLAGS, /* flags */ }, 890 [4] = { .scnprintf = SCA_SOCKADDR, /* addr */ }, }, }, 891 { .name = "set_tid_address", .errpid = true, }, 892 { .name = "setitimer", 893 .arg = { [0] = STRARRAY(which, itimers), }, }, 894 { .name = "setrlimit", 895 .arg = { [0] = STRARRAY(resource, rlimit_resources), }, }, 896 { .name = "socket", 897 .arg = { [0] = STRARRAY(family, socket_families), 898 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 899 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 900 { .name = "socketpair", 901 .arg = { [0] = STRARRAY(family, socket_families), 902 [1] = { .scnprintf = SCA_SK_TYPE, /* type */ }, 903 [2] = { .scnprintf = SCA_SK_PROTO, /* protocol */ }, }, }, 904 { .name = "stat", .alias = "newstat", }, 905 { .name = "statx", 906 .arg = { [0] = { .scnprintf = SCA_FDAT, /* fdat */ }, 907 [2] = { .scnprintf = SCA_STATX_FLAGS, /* flags */ } , 908 [3] = { .scnprintf = SCA_STATX_MASK, /* mask */ }, }, }, 909 { .name = "swapoff", 910 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 911 { .name = "swapon", 912 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* specialfile */ }, }, }, 913 { .name = "symlinkat", 914 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 915 { .name = "sync_file_range", 916 .arg = { [3] = { .scnprintf = SCA_SYNC_FILE_RANGE_FLAGS, /* flags */ }, }, }, 917 { .name = "tgkill", 918 .arg = { [2] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 919 { .name = "tkill", 920 .arg = { [1] = { .scnprintf = SCA_SIGNUM, /* sig */ }, }, }, 921 { .name = "umount2", .alias = "umount", 922 .arg = { [0] = { .scnprintf = SCA_FILENAME, /* name */ }, }, }, 923 { .name = "uname", .alias = "newuname", }, 924 { .name = "unlinkat", 925 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dfd */ }, }, }, 926 { .name = "utimensat", 927 .arg = { [0] = { .scnprintf = SCA_FDAT, /* dirfd */ }, }, }, 928 { .name = "wait4", .errpid = true, 929 .arg = { [2] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 930 { .name = "waitid", .errpid = true, 931 .arg = { [3] = { .scnprintf = SCA_WAITID_OPTIONS, /* options */ }, }, }, 932 }; 933 934 static int syscall_fmt__cmp(const void *name, const void *fmtp) 935 { 936 const struct syscall_fmt *fmt = fmtp; 937 return strcmp(name, fmt->name); 938 } 939 940 static struct syscall_fmt *syscall_fmt__find(const char *name) 941 { 942 const int nmemb = ARRAY_SIZE(syscall_fmts); 943 return bsearch(name, syscall_fmts, nmemb, sizeof(struct syscall_fmt), syscall_fmt__cmp); 944 } 945 946 static struct syscall_fmt *syscall_fmt__find_by_alias(const char *alias) 947 { 948 int i, nmemb = ARRAY_SIZE(syscall_fmts); 949 950 for (i = 0; i < nmemb; ++i) { 951 if (syscall_fmts[i].alias && strcmp(syscall_fmts[i].alias, alias) == 0) 952 return &syscall_fmts[i]; 953 } 954 955 return NULL; 956 } 957 958 /* 959 * is_exit: is this "exit" or "exit_group"? 960 * is_open: is this "open" or "openat"? To associate the fd returned in sys_exit with the pathname in sys_enter. 961 * args_size: sum of the sizes of the syscall arguments, anything after that is augmented stuff: pathname for openat, etc. 962 */ 963 struct syscall { 964 struct tep_event *tp_format; 965 int nr_args; 966 int args_size; 967 bool is_exit; 968 bool is_open; 969 struct tep_format_field *args; 970 const char *name; 971 struct syscall_fmt *fmt; 972 struct syscall_arg_fmt *arg_fmt; 973 }; 974 975 /* 976 * Must match what is in the BPF program: 977 * 978 * tools/perf/examples/bpf/augmented_raw_syscalls.c 979 */ 980 struct bpf_map_syscall_entry { 981 bool enabled; 982 u16 string_args_len[6]; 983 }; 984 985 /* 986 * We need to have this 'calculated' boolean because in some cases we really 987 * don't know what is the duration of a syscall, for instance, when we start 988 * a session and some threads are waiting for a syscall to finish, say 'poll', 989 * in which case all we can do is to print "( ? ) for duration and for the 990 * start timestamp. 991 */ 992 static size_t fprintf_duration(unsigned long t, bool calculated, FILE *fp) 993 { 994 double duration = (double)t / NSEC_PER_MSEC; 995 size_t printed = fprintf(fp, "("); 996 997 if (!calculated) 998 printed += fprintf(fp, " "); 999 else if (duration >= 1.0) 1000 printed += color_fprintf(fp, PERF_COLOR_RED, "%6.3f ms", duration); 1001 else if (duration >= 0.01) 1002 printed += color_fprintf(fp, PERF_COLOR_YELLOW, "%6.3f ms", duration); 1003 else 1004 printed += color_fprintf(fp, PERF_COLOR_NORMAL, "%6.3f ms", duration); 1005 return printed + fprintf(fp, "): "); 1006 } 1007 1008 /** 1009 * filename.ptr: The filename char pointer that will be vfs_getname'd 1010 * filename.entry_str_pos: Where to insert the string translated from 1011 * filename.ptr by the vfs_getname tracepoint/kprobe. 1012 * ret_scnprintf: syscall args may set this to a different syscall return 1013 * formatter, for instance, fcntl may return fds, file flags, etc. 1014 */ 1015 struct thread_trace { 1016 u64 entry_time; 1017 bool entry_pending; 1018 unsigned long nr_events; 1019 unsigned long pfmaj, pfmin; 1020 char *entry_str; 1021 double runtime_ms; 1022 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg); 1023 struct { 1024 unsigned long ptr; 1025 short int entry_str_pos; 1026 bool pending_open; 1027 unsigned int namelen; 1028 char *name; 1029 } filename; 1030 struct { 1031 int max; 1032 struct file *table; 1033 } files; 1034 1035 struct intlist *syscall_stats; 1036 }; 1037 1038 static struct thread_trace *thread_trace__new(void) 1039 { 1040 struct thread_trace *ttrace = zalloc(sizeof(struct thread_trace)); 1041 1042 if (ttrace) { 1043 ttrace->files.max = -1; 1044 ttrace->syscall_stats = intlist__new(NULL); 1045 } 1046 1047 return ttrace; 1048 } 1049 1050 static struct thread_trace *thread__trace(struct thread *thread, FILE *fp) 1051 { 1052 struct thread_trace *ttrace; 1053 1054 if (thread == NULL) 1055 goto fail; 1056 1057 if (thread__priv(thread) == NULL) 1058 thread__set_priv(thread, thread_trace__new()); 1059 1060 if (thread__priv(thread) == NULL) 1061 goto fail; 1062 1063 ttrace = thread__priv(thread); 1064 ++ttrace->nr_events; 1065 1066 return ttrace; 1067 fail: 1068 color_fprintf(fp, PERF_COLOR_RED, 1069 "WARNING: not enough memory, dropping samples!\n"); 1070 return NULL; 1071 } 1072 1073 1074 void syscall_arg__set_ret_scnprintf(struct syscall_arg *arg, 1075 size_t (*ret_scnprintf)(char *bf, size_t size, struct syscall_arg *arg)) 1076 { 1077 struct thread_trace *ttrace = thread__priv(arg->thread); 1078 1079 ttrace->ret_scnprintf = ret_scnprintf; 1080 } 1081 1082 #define TRACE_PFMAJ (1 << 0) 1083 #define TRACE_PFMIN (1 << 1) 1084 1085 static const size_t trace__entry_str_size = 2048; 1086 1087 static struct file *thread_trace__files_entry(struct thread_trace *ttrace, int fd) 1088 { 1089 if (fd < 0) 1090 return NULL; 1091 1092 if (fd > ttrace->files.max) { 1093 struct file *nfiles = realloc(ttrace->files.table, (fd + 1) * sizeof(struct file)); 1094 1095 if (nfiles == NULL) 1096 return NULL; 1097 1098 if (ttrace->files.max != -1) { 1099 memset(nfiles + ttrace->files.max + 1, 0, 1100 (fd - ttrace->files.max) * sizeof(struct file)); 1101 } else { 1102 memset(nfiles, 0, (fd + 1) * sizeof(struct file)); 1103 } 1104 1105 ttrace->files.table = nfiles; 1106 ttrace->files.max = fd; 1107 } 1108 1109 return ttrace->files.table + fd; 1110 } 1111 1112 struct file *thread__files_entry(struct thread *thread, int fd) 1113 { 1114 return thread_trace__files_entry(thread__priv(thread), fd); 1115 } 1116 1117 static int trace__set_fd_pathname(struct thread *thread, int fd, const char *pathname) 1118 { 1119 struct thread_trace *ttrace = thread__priv(thread); 1120 struct file *file = thread_trace__files_entry(ttrace, fd); 1121 1122 if (file != NULL) { 1123 struct stat st; 1124 if (stat(pathname, &st) == 0) 1125 file->dev_maj = major(st.st_rdev); 1126 file->pathname = strdup(pathname); 1127 if (file->pathname) 1128 return 0; 1129 } 1130 1131 return -1; 1132 } 1133 1134 static int thread__read_fd_path(struct thread *thread, int fd) 1135 { 1136 char linkname[PATH_MAX], pathname[PATH_MAX]; 1137 struct stat st; 1138 int ret; 1139 1140 if (thread->pid_ == thread->tid) { 1141 scnprintf(linkname, sizeof(linkname), 1142 "/proc/%d/fd/%d", thread->pid_, fd); 1143 } else { 1144 scnprintf(linkname, sizeof(linkname), 1145 "/proc/%d/task/%d/fd/%d", thread->pid_, thread->tid, fd); 1146 } 1147 1148 if (lstat(linkname, &st) < 0 || st.st_size + 1 > (off_t)sizeof(pathname)) 1149 return -1; 1150 1151 ret = readlink(linkname, pathname, sizeof(pathname)); 1152 1153 if (ret < 0 || ret > st.st_size) 1154 return -1; 1155 1156 pathname[ret] = '\0'; 1157 return trace__set_fd_pathname(thread, fd, pathname); 1158 } 1159 1160 static const char *thread__fd_path(struct thread *thread, int fd, 1161 struct trace *trace) 1162 { 1163 struct thread_trace *ttrace = thread__priv(thread); 1164 1165 if (ttrace == NULL) 1166 return NULL; 1167 1168 if (fd < 0) 1169 return NULL; 1170 1171 if ((fd > ttrace->files.max || ttrace->files.table[fd].pathname == NULL)) { 1172 if (!trace->live) 1173 return NULL; 1174 ++trace->stats.proc_getname; 1175 if (thread__read_fd_path(thread, fd)) 1176 return NULL; 1177 } 1178 1179 return ttrace->files.table[fd].pathname; 1180 } 1181 1182 size_t syscall_arg__scnprintf_fd(char *bf, size_t size, struct syscall_arg *arg) 1183 { 1184 int fd = arg->val; 1185 size_t printed = scnprintf(bf, size, "%d", fd); 1186 const char *path = thread__fd_path(arg->thread, fd, arg->trace); 1187 1188 if (path) 1189 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1190 1191 return printed; 1192 } 1193 1194 size_t pid__scnprintf_fd(struct trace *trace, pid_t pid, int fd, char *bf, size_t size) 1195 { 1196 size_t printed = scnprintf(bf, size, "%d", fd); 1197 struct thread *thread = machine__find_thread(trace->host, pid, pid); 1198 1199 if (thread) { 1200 const char *path = thread__fd_path(thread, fd, trace); 1201 1202 if (path) 1203 printed += scnprintf(bf + printed, size - printed, "<%s>", path); 1204 1205 thread__put(thread); 1206 } 1207 1208 return printed; 1209 } 1210 1211 static size_t syscall_arg__scnprintf_close_fd(char *bf, size_t size, 1212 struct syscall_arg *arg) 1213 { 1214 int fd = arg->val; 1215 size_t printed = syscall_arg__scnprintf_fd(bf, size, arg); 1216 struct thread_trace *ttrace = thread__priv(arg->thread); 1217 1218 if (ttrace && fd >= 0 && fd <= ttrace->files.max) 1219 zfree(&ttrace->files.table[fd].pathname); 1220 1221 return printed; 1222 } 1223 1224 static void thread__set_filename_pos(struct thread *thread, const char *bf, 1225 unsigned long ptr) 1226 { 1227 struct thread_trace *ttrace = thread__priv(thread); 1228 1229 ttrace->filename.ptr = ptr; 1230 ttrace->filename.entry_str_pos = bf - ttrace->entry_str; 1231 } 1232 1233 static size_t syscall_arg__scnprintf_augmented_string(struct syscall_arg *arg, char *bf, size_t size) 1234 { 1235 struct augmented_arg *augmented_arg = arg->augmented.args; 1236 size_t printed = scnprintf(bf, size, "\"%.*s\"", augmented_arg->size, augmented_arg->value); 1237 /* 1238 * So that the next arg with a payload can consume its augmented arg, i.e. for rename* syscalls 1239 * we would have two strings, each prefixed by its size. 1240 */ 1241 int consumed = sizeof(*augmented_arg) + augmented_arg->size; 1242 1243 arg->augmented.args = ((void *)arg->augmented.args) + consumed; 1244 arg->augmented.size -= consumed; 1245 1246 return printed; 1247 } 1248 1249 static size_t syscall_arg__scnprintf_filename(char *bf, size_t size, 1250 struct syscall_arg *arg) 1251 { 1252 unsigned long ptr = arg->val; 1253 1254 if (arg->augmented.args) 1255 return syscall_arg__scnprintf_augmented_string(arg, bf, size); 1256 1257 if (!arg->trace->vfs_getname) 1258 return scnprintf(bf, size, "%#x", ptr); 1259 1260 thread__set_filename_pos(arg->thread, bf, ptr); 1261 return 0; 1262 } 1263 1264 static bool trace__filter_duration(struct trace *trace, double t) 1265 { 1266 return t < (trace->duration_filter * NSEC_PER_MSEC); 1267 } 1268 1269 static size_t __trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1270 { 1271 double ts = (double)(tstamp - trace->base_time) / NSEC_PER_MSEC; 1272 1273 return fprintf(fp, "%10.3f ", ts); 1274 } 1275 1276 /* 1277 * We're handling tstamp=0 as an undefined tstamp, i.e. like when we are 1278 * using ttrace->entry_time for a thread that receives a sys_exit without 1279 * first having received a sys_enter ("poll" issued before tracing session 1280 * starts, lost sys_enter exit due to ring buffer overflow). 1281 */ 1282 static size_t trace__fprintf_tstamp(struct trace *trace, u64 tstamp, FILE *fp) 1283 { 1284 if (tstamp > 0) 1285 return __trace__fprintf_tstamp(trace, tstamp, fp); 1286 1287 return fprintf(fp, " ? "); 1288 } 1289 1290 static bool done = false; 1291 static bool interrupted = false; 1292 1293 static void sig_handler(int sig) 1294 { 1295 done = true; 1296 interrupted = sig == SIGINT; 1297 } 1298 1299 static size_t trace__fprintf_comm_tid(struct trace *trace, struct thread *thread, FILE *fp) 1300 { 1301 size_t printed = 0; 1302 1303 if (trace->multiple_threads) { 1304 if (trace->show_comm) 1305 printed += fprintf(fp, "%.14s/", thread__comm_str(thread)); 1306 printed += fprintf(fp, "%d ", thread->tid); 1307 } 1308 1309 return printed; 1310 } 1311 1312 static size_t trace__fprintf_entry_head(struct trace *trace, struct thread *thread, 1313 u64 duration, bool duration_calculated, u64 tstamp, FILE *fp) 1314 { 1315 size_t printed = 0; 1316 1317 if (trace->show_tstamp) 1318 printed = trace__fprintf_tstamp(trace, tstamp, fp); 1319 if (trace->show_duration) 1320 printed += fprintf_duration(duration, duration_calculated, fp); 1321 return printed + trace__fprintf_comm_tid(trace, thread, fp); 1322 } 1323 1324 static int trace__process_event(struct trace *trace, struct machine *machine, 1325 union perf_event *event, struct perf_sample *sample) 1326 { 1327 int ret = 0; 1328 1329 switch (event->header.type) { 1330 case PERF_RECORD_LOST: 1331 color_fprintf(trace->output, PERF_COLOR_RED, 1332 "LOST %" PRIu64 " events!\n", event->lost.lost); 1333 ret = machine__process_lost_event(machine, event, sample); 1334 break; 1335 default: 1336 ret = machine__process_event(machine, event, sample); 1337 break; 1338 } 1339 1340 return ret; 1341 } 1342 1343 static int trace__tool_process(struct perf_tool *tool, 1344 union perf_event *event, 1345 struct perf_sample *sample, 1346 struct machine *machine) 1347 { 1348 struct trace *trace = container_of(tool, struct trace, tool); 1349 return trace__process_event(trace, machine, event, sample); 1350 } 1351 1352 static char *trace__machine__resolve_kernel_addr(void *vmachine, unsigned long long *addrp, char **modp) 1353 { 1354 struct machine *machine = vmachine; 1355 1356 if (machine->kptr_restrict_warned) 1357 return NULL; 1358 1359 if (symbol_conf.kptr_restrict) { 1360 pr_warning("Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 1361 "Check /proc/sys/kernel/kptr_restrict.\n\n" 1362 "Kernel samples will not be resolved.\n"); 1363 machine->kptr_restrict_warned = true; 1364 return NULL; 1365 } 1366 1367 return machine__resolve_kernel_addr(vmachine, addrp, modp); 1368 } 1369 1370 static int trace__symbols_init(struct trace *trace, struct perf_evlist *evlist) 1371 { 1372 int err = symbol__init(NULL); 1373 1374 if (err) 1375 return err; 1376 1377 trace->host = machine__new_host(); 1378 if (trace->host == NULL) 1379 return -ENOMEM; 1380 1381 err = trace_event__register_resolver(trace->host, trace__machine__resolve_kernel_addr); 1382 if (err < 0) 1383 goto out; 1384 1385 err = __machine__synthesize_threads(trace->host, &trace->tool, &trace->opts.target, 1386 evlist->threads, trace__tool_process, false, 1387 1); 1388 out: 1389 if (err) 1390 symbol__exit(); 1391 1392 return err; 1393 } 1394 1395 static void trace__symbols__exit(struct trace *trace) 1396 { 1397 machine__exit(trace->host); 1398 trace->host = NULL; 1399 1400 symbol__exit(); 1401 } 1402 1403 static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 1404 { 1405 int idx; 1406 1407 if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0) 1408 nr_args = sc->fmt->nr_args; 1409 1410 sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt)); 1411 if (sc->arg_fmt == NULL) 1412 return -1; 1413 1414 for (idx = 0; idx < nr_args; ++idx) { 1415 if (sc->fmt) 1416 sc->arg_fmt[idx] = sc->fmt->arg[idx]; 1417 } 1418 1419 sc->nr_args = nr_args; 1420 return 0; 1421 } 1422 1423 static int syscall__set_arg_fmts(struct syscall *sc) 1424 { 1425 struct tep_format_field *field, *last_field = NULL; 1426 int idx = 0, len; 1427 1428 for (field = sc->args; field; field = field->next, ++idx) { 1429 last_field = field; 1430 1431 if (sc->fmt && sc->fmt->arg[idx].scnprintf) 1432 continue; 1433 1434 len = strlen(field->name); 1435 1436 if (strcmp(field->type, "const char *") == 0 && 1437 ((len >= 4 && strcmp(field->name + len - 4, "name") == 0) || 1438 strstr(field->name, "path") != NULL)) 1439 sc->arg_fmt[idx].scnprintf = SCA_FILENAME; 1440 else if ((field->flags & TEP_FIELD_IS_POINTER) || strstr(field->name, "addr")) 1441 sc->arg_fmt[idx].scnprintf = SCA_PTR; 1442 else if (strcmp(field->type, "pid_t") == 0) 1443 sc->arg_fmt[idx].scnprintf = SCA_PID; 1444 else if (strcmp(field->type, "umode_t") == 0) 1445 sc->arg_fmt[idx].scnprintf = SCA_MODE_T; 1446 else if ((strcmp(field->type, "int") == 0 || 1447 strcmp(field->type, "unsigned int") == 0 || 1448 strcmp(field->type, "long") == 0) && 1449 len >= 2 && strcmp(field->name + len - 2, "fd") == 0) { 1450 /* 1451 * /sys/kernel/tracing/events/syscalls/sys_enter* 1452 * egrep 'field:.*fd;' .../format|sed -r 's/.*field:([a-z ]+) [a-z_]*fd.+/\1/g'|sort|uniq -c 1453 * 65 int 1454 * 23 unsigned int 1455 * 7 unsigned long 1456 */ 1457 sc->arg_fmt[idx].scnprintf = SCA_FD; 1458 } 1459 } 1460 1461 if (last_field) 1462 sc->args_size = last_field->offset + last_field->size; 1463 1464 return 0; 1465 } 1466 1467 static int trace__read_syscall_info(struct trace *trace, int id) 1468 { 1469 char tp_name[128]; 1470 struct syscall *sc; 1471 const char *name = syscalltbl__name(trace->sctbl, id); 1472 1473 if (name == NULL) 1474 return -1; 1475 1476 if (id > trace->syscalls.max) { 1477 struct syscall *nsyscalls = realloc(trace->syscalls.table, (id + 1) * sizeof(*sc)); 1478 1479 if (nsyscalls == NULL) 1480 return -1; 1481 1482 if (trace->syscalls.max != -1) { 1483 memset(nsyscalls + trace->syscalls.max + 1, 0, 1484 (id - trace->syscalls.max) * sizeof(*sc)); 1485 } else { 1486 memset(nsyscalls, 0, (id + 1) * sizeof(*sc)); 1487 } 1488 1489 trace->syscalls.table = nsyscalls; 1490 trace->syscalls.max = id; 1491 } 1492 1493 sc = trace->syscalls.table + id; 1494 sc->name = name; 1495 1496 sc->fmt = syscall_fmt__find(sc->name); 1497 1498 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->name); 1499 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1500 1501 if (IS_ERR(sc->tp_format) && sc->fmt && sc->fmt->alias) { 1502 snprintf(tp_name, sizeof(tp_name), "sys_enter_%s", sc->fmt->alias); 1503 sc->tp_format = trace_event__tp_format("syscalls", tp_name); 1504 } 1505 1506 if (syscall__alloc_arg_fmts(sc, IS_ERR(sc->tp_format) ? 6 : sc->tp_format->format.nr_fields)) 1507 return -1; 1508 1509 if (IS_ERR(sc->tp_format)) 1510 return -1; 1511 1512 sc->args = sc->tp_format->format.fields; 1513 /* 1514 * We need to check and discard the first variable '__syscall_nr' 1515 * or 'nr' that mean the syscall number. It is needless here. 1516 * So drop '__syscall_nr' or 'nr' field but does not exist on older kernels. 1517 */ 1518 if (sc->args && (!strcmp(sc->args->name, "__syscall_nr") || !strcmp(sc->args->name, "nr"))) { 1519 sc->args = sc->args->next; 1520 --sc->nr_args; 1521 } 1522 1523 sc->is_exit = !strcmp(name, "exit_group") || !strcmp(name, "exit"); 1524 sc->is_open = !strcmp(name, "open") || !strcmp(name, "openat"); 1525 1526 return syscall__set_arg_fmts(sc); 1527 } 1528 1529 static int trace__validate_ev_qualifier(struct trace *trace) 1530 { 1531 int err = 0; 1532 bool printed_invalid_prefix = false; 1533 struct str_node *pos; 1534 size_t nr_used = 0, nr_allocated = strlist__nr_entries(trace->ev_qualifier); 1535 1536 trace->ev_qualifier_ids.entries = malloc(nr_allocated * 1537 sizeof(trace->ev_qualifier_ids.entries[0])); 1538 1539 if (trace->ev_qualifier_ids.entries == NULL) { 1540 fputs("Error:\tNot enough memory for allocating events qualifier ids\n", 1541 trace->output); 1542 err = -EINVAL; 1543 goto out; 1544 } 1545 1546 strlist__for_each_entry(pos, trace->ev_qualifier) { 1547 const char *sc = pos->s; 1548 int id = syscalltbl__id(trace->sctbl, sc), match_next = -1; 1549 1550 if (id < 0) { 1551 id = syscalltbl__strglobmatch_first(trace->sctbl, sc, &match_next); 1552 if (id >= 0) 1553 goto matches; 1554 1555 if (!printed_invalid_prefix) { 1556 pr_debug("Skipping unknown syscalls: "); 1557 printed_invalid_prefix = true; 1558 } else { 1559 pr_debug(", "); 1560 } 1561 1562 pr_debug("%s", sc); 1563 continue; 1564 } 1565 matches: 1566 trace->ev_qualifier_ids.entries[nr_used++] = id; 1567 if (match_next == -1) 1568 continue; 1569 1570 while (1) { 1571 id = syscalltbl__strglobmatch_next(trace->sctbl, sc, &match_next); 1572 if (id < 0) 1573 break; 1574 if (nr_allocated == nr_used) { 1575 void *entries; 1576 1577 nr_allocated += 8; 1578 entries = realloc(trace->ev_qualifier_ids.entries, 1579 nr_allocated * sizeof(trace->ev_qualifier_ids.entries[0])); 1580 if (entries == NULL) { 1581 err = -ENOMEM; 1582 fputs("\nError:\t Not enough memory for parsing\n", trace->output); 1583 goto out_free; 1584 } 1585 trace->ev_qualifier_ids.entries = entries; 1586 } 1587 trace->ev_qualifier_ids.entries[nr_used++] = id; 1588 } 1589 } 1590 1591 trace->ev_qualifier_ids.nr = nr_used; 1592 out: 1593 if (printed_invalid_prefix) 1594 pr_debug("\n"); 1595 return err; 1596 out_free: 1597 zfree(&trace->ev_qualifier_ids.entries); 1598 trace->ev_qualifier_ids.nr = 0; 1599 goto out; 1600 } 1601 1602 /* 1603 * args is to be interpreted as a series of longs but we need to handle 1604 * 8-byte unaligned accesses. args points to raw_data within the event 1605 * and raw_data is guaranteed to be 8-byte unaligned because it is 1606 * preceded by raw_size which is a u32. So we need to copy args to a temp 1607 * variable to read it. Most notably this avoids extended load instructions 1608 * on unaligned addresses 1609 */ 1610 unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx) 1611 { 1612 unsigned long val; 1613 unsigned char *p = arg->args + sizeof(unsigned long) * idx; 1614 1615 memcpy(&val, p, sizeof(val)); 1616 return val; 1617 } 1618 1619 static size_t syscall__scnprintf_name(struct syscall *sc, char *bf, size_t size, 1620 struct syscall_arg *arg) 1621 { 1622 if (sc->arg_fmt && sc->arg_fmt[arg->idx].name) 1623 return scnprintf(bf, size, "%s: ", sc->arg_fmt[arg->idx].name); 1624 1625 return scnprintf(bf, size, "arg%d: ", arg->idx); 1626 } 1627 1628 /* 1629 * Check if the value is in fact zero, i.e. mask whatever needs masking, such 1630 * as mount 'flags' argument that needs ignoring some magic flag, see comment 1631 * in tools/perf/trace/beauty/mount_flags.c 1632 */ 1633 static unsigned long syscall__mask_val(struct syscall *sc, struct syscall_arg *arg, unsigned long val) 1634 { 1635 if (sc->arg_fmt && sc->arg_fmt[arg->idx].mask_val) 1636 return sc->arg_fmt[arg->idx].mask_val(arg, val); 1637 1638 return val; 1639 } 1640 1641 static size_t syscall__scnprintf_val(struct syscall *sc, char *bf, size_t size, 1642 struct syscall_arg *arg, unsigned long val) 1643 { 1644 if (sc->arg_fmt && sc->arg_fmt[arg->idx].scnprintf) { 1645 arg->val = val; 1646 if (sc->arg_fmt[arg->idx].parm) 1647 arg->parm = sc->arg_fmt[arg->idx].parm; 1648 return sc->arg_fmt[arg->idx].scnprintf(bf, size, arg); 1649 } 1650 return scnprintf(bf, size, "%ld", val); 1651 } 1652 1653 static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 1654 unsigned char *args, void *augmented_args, int augmented_args_size, 1655 struct trace *trace, struct thread *thread) 1656 { 1657 size_t printed = 0; 1658 unsigned long val; 1659 u8 bit = 1; 1660 struct syscall_arg arg = { 1661 .args = args, 1662 .augmented = { 1663 .size = augmented_args_size, 1664 .args = augmented_args, 1665 }, 1666 .idx = 0, 1667 .mask = 0, 1668 .trace = trace, 1669 .thread = thread, 1670 .show_string_prefix = trace->show_string_prefix, 1671 }; 1672 struct thread_trace *ttrace = thread__priv(thread); 1673 1674 /* 1675 * Things like fcntl will set this in its 'cmd' formatter to pick the 1676 * right formatter for the return value (an fd? file flags?), which is 1677 * not needed for syscalls that always return a given type, say an fd. 1678 */ 1679 ttrace->ret_scnprintf = NULL; 1680 1681 if (sc->args != NULL) { 1682 struct tep_format_field *field; 1683 1684 for (field = sc->args; field; 1685 field = field->next, ++arg.idx, bit <<= 1) { 1686 if (arg.mask & bit) 1687 continue; 1688 1689 val = syscall_arg__val(&arg, arg.idx); 1690 /* 1691 * Some syscall args need some mask, most don't and 1692 * return val untouched. 1693 */ 1694 val = syscall__mask_val(sc, &arg, val); 1695 1696 /* 1697 * Suppress this argument if its value is zero and 1698 * and we don't have a string associated in an 1699 * strarray for it. 1700 */ 1701 if (val == 0 && 1702 !trace->show_zeros && 1703 !(sc->arg_fmt && 1704 (sc->arg_fmt[arg.idx].show_zero || 1705 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAY || 1706 sc->arg_fmt[arg.idx].scnprintf == SCA_STRARRAYS) && 1707 sc->arg_fmt[arg.idx].parm)) 1708 continue; 1709 1710 printed += scnprintf(bf + printed, size - printed, "%s", printed ? ", " : ""); 1711 1712 if (trace->show_arg_names) 1713 printed += scnprintf(bf + printed, size - printed, "%s: ", field->name); 1714 1715 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1716 } 1717 } else if (IS_ERR(sc->tp_format)) { 1718 /* 1719 * If we managed to read the tracepoint /format file, then we 1720 * may end up not having any args, like with gettid(), so only 1721 * print the raw args when we didn't manage to read it. 1722 */ 1723 while (arg.idx < sc->nr_args) { 1724 if (arg.mask & bit) 1725 goto next_arg; 1726 val = syscall_arg__val(&arg, arg.idx); 1727 if (printed) 1728 printed += scnprintf(bf + printed, size - printed, ", "); 1729 printed += syscall__scnprintf_name(sc, bf + printed, size - printed, &arg); 1730 printed += syscall__scnprintf_val(sc, bf + printed, size - printed, &arg, val); 1731 next_arg: 1732 ++arg.idx; 1733 bit <<= 1; 1734 } 1735 } 1736 1737 return printed; 1738 } 1739 1740 typedef int (*tracepoint_handler)(struct trace *trace, struct perf_evsel *evsel, 1741 union perf_event *event, 1742 struct perf_sample *sample); 1743 1744 static struct syscall *trace__syscall_info(struct trace *trace, 1745 struct perf_evsel *evsel, int id) 1746 { 1747 1748 if (id < 0) { 1749 1750 /* 1751 * XXX: Noticed on x86_64, reproduced as far back as 3.0.36, haven't tried 1752 * before that, leaving at a higher verbosity level till that is 1753 * explained. Reproduced with plain ftrace with: 1754 * 1755 * echo 1 > /t/events/raw_syscalls/sys_exit/enable 1756 * grep "NR -1 " /t/trace_pipe 1757 * 1758 * After generating some load on the machine. 1759 */ 1760 if (verbose > 1) { 1761 static u64 n; 1762 fprintf(trace->output, "Invalid syscall %d id, skipping (%s, %" PRIu64 ") ...\n", 1763 id, perf_evsel__name(evsel), ++n); 1764 } 1765 return NULL; 1766 } 1767 1768 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL) && 1769 trace__read_syscall_info(trace, id)) 1770 goto out_cant_read; 1771 1772 if ((id > trace->syscalls.max || trace->syscalls.table[id].name == NULL)) 1773 goto out_cant_read; 1774 1775 return &trace->syscalls.table[id]; 1776 1777 out_cant_read: 1778 if (verbose > 0) { 1779 fprintf(trace->output, "Problems reading syscall %d", id); 1780 if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL) 1781 fprintf(trace->output, "(%s)", trace->syscalls.table[id].name); 1782 fputs(" information\n", trace->output); 1783 } 1784 return NULL; 1785 } 1786 1787 static void thread__update_stats(struct thread_trace *ttrace, 1788 int id, struct perf_sample *sample) 1789 { 1790 struct int_node *inode; 1791 struct stats *stats; 1792 u64 duration = 0; 1793 1794 inode = intlist__findnew(ttrace->syscall_stats, id); 1795 if (inode == NULL) 1796 return; 1797 1798 stats = inode->priv; 1799 if (stats == NULL) { 1800 stats = malloc(sizeof(struct stats)); 1801 if (stats == NULL) 1802 return; 1803 init_stats(stats); 1804 inode->priv = stats; 1805 } 1806 1807 if (ttrace->entry_time && sample->time > ttrace->entry_time) 1808 duration = sample->time - ttrace->entry_time; 1809 1810 update_stats(stats, duration); 1811 } 1812 1813 static int trace__printf_interrupted_entry(struct trace *trace) 1814 { 1815 struct thread_trace *ttrace; 1816 size_t printed; 1817 int len; 1818 1819 if (trace->failure_only || trace->current == NULL) 1820 return 0; 1821 1822 ttrace = thread__priv(trace->current); 1823 1824 if (!ttrace->entry_pending) 1825 return 0; 1826 1827 printed = trace__fprintf_entry_head(trace, trace->current, 0, false, ttrace->entry_time, trace->output); 1828 printed += len = fprintf(trace->output, "%s)", ttrace->entry_str); 1829 1830 if (len < trace->args_alignment - 4) 1831 printed += fprintf(trace->output, "%-*s", trace->args_alignment - 4 - len, " "); 1832 1833 printed += fprintf(trace->output, " ...\n"); 1834 1835 ttrace->entry_pending = false; 1836 ++trace->nr_events_printed; 1837 1838 return printed; 1839 } 1840 1841 static int trace__fprintf_sample(struct trace *trace, struct perf_evsel *evsel, 1842 struct perf_sample *sample, struct thread *thread) 1843 { 1844 int printed = 0; 1845 1846 if (trace->print_sample) { 1847 double ts = (double)sample->time / NSEC_PER_MSEC; 1848 1849 printed += fprintf(trace->output, "%22s %10.3f %s %d/%d [%d]\n", 1850 perf_evsel__name(evsel), ts, 1851 thread__comm_str(thread), 1852 sample->pid, sample->tid, sample->cpu); 1853 } 1854 1855 return printed; 1856 } 1857 1858 static void *syscall__augmented_args(struct syscall *sc, struct perf_sample *sample, int *augmented_args_size, int raw_augmented_args_size) 1859 { 1860 void *augmented_args = NULL; 1861 /* 1862 * For now with BPF raw_augmented we hook into raw_syscalls:sys_enter 1863 * and there we get all 6 syscall args plus the tracepoint common fields 1864 * that gets calculated at the start and the syscall_nr (another long). 1865 * So we check if that is the case and if so don't look after the 1866 * sc->args_size but always after the full raw_syscalls:sys_enter payload, 1867 * which is fixed. 1868 * 1869 * We'll revisit this later to pass s->args_size to the BPF augmenter 1870 * (now tools/perf/examples/bpf/augmented_raw_syscalls.c, so that it 1871 * copies only what we need for each syscall, like what happens when we 1872 * use syscalls:sys_enter_NAME, so that we reduce the kernel/userspace 1873 * traffic to just what is needed for each syscall. 1874 */ 1875 int args_size = raw_augmented_args_size ?: sc->args_size; 1876 1877 *augmented_args_size = sample->raw_size - args_size; 1878 if (*augmented_args_size > 0) 1879 augmented_args = sample->raw_data + args_size; 1880 1881 return augmented_args; 1882 } 1883 1884 static int trace__sys_enter(struct trace *trace, struct perf_evsel *evsel, 1885 union perf_event *event __maybe_unused, 1886 struct perf_sample *sample) 1887 { 1888 char *msg; 1889 void *args; 1890 int printed = 0; 1891 struct thread *thread; 1892 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1893 int augmented_args_size = 0; 1894 void *augmented_args = NULL; 1895 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1896 struct thread_trace *ttrace; 1897 1898 if (sc == NULL) 1899 return -1; 1900 1901 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1902 ttrace = thread__trace(thread, trace->output); 1903 if (ttrace == NULL) 1904 goto out_put; 1905 1906 trace__fprintf_sample(trace, evsel, sample, thread); 1907 1908 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1909 1910 if (ttrace->entry_str == NULL) { 1911 ttrace->entry_str = malloc(trace__entry_str_size); 1912 if (!ttrace->entry_str) 1913 goto out_put; 1914 } 1915 1916 if (!(trace->duration_filter || trace->summary_only || trace->min_stack)) 1917 trace__printf_interrupted_entry(trace); 1918 /* 1919 * If this is raw_syscalls.sys_enter, then it always comes with the 6 possible 1920 * arguments, even if the syscall being handled, say "openat", uses only 4 arguments 1921 * this breaks syscall__augmented_args() check for augmented args, as we calculate 1922 * syscall->args_size using each syscalls:sys_enter_NAME tracefs format file, 1923 * so when handling, say the openat syscall, we end up getting 6 args for the 1924 * raw_syscalls:sys_enter event, when we expected just 4, we end up mistakenly 1925 * thinking that the extra 2 u64 args are the augmented filename, so just check 1926 * here and avoid using augmented syscalls when the evsel is the raw_syscalls one. 1927 */ 1928 if (evsel != trace->syscalls.events.sys_enter) 1929 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1930 ttrace->entry_time = sample->time; 1931 msg = ttrace->entry_str; 1932 printed += scnprintf(msg + printed, trace__entry_str_size - printed, "%s(", sc->name); 1933 1934 printed += syscall__scnprintf_args(sc, msg + printed, trace__entry_str_size - printed, 1935 args, augmented_args, augmented_args_size, trace, thread); 1936 1937 if (sc->is_exit) { 1938 if (!(trace->duration_filter || trace->summary_only || trace->failure_only || trace->min_stack)) { 1939 int alignment = 0; 1940 1941 trace__fprintf_entry_head(trace, thread, 0, false, ttrace->entry_time, trace->output); 1942 printed = fprintf(trace->output, "%s)", ttrace->entry_str); 1943 if (trace->args_alignment > printed) 1944 alignment = trace->args_alignment - printed; 1945 fprintf(trace->output, "%*s= ?\n", alignment, " "); 1946 } 1947 } else { 1948 ttrace->entry_pending = true; 1949 /* See trace__vfs_getname & trace__sys_exit */ 1950 ttrace->filename.pending_open = false; 1951 } 1952 1953 if (trace->current != thread) { 1954 thread__put(trace->current); 1955 trace->current = thread__get(thread); 1956 } 1957 err = 0; 1958 out_put: 1959 thread__put(thread); 1960 return err; 1961 } 1962 1963 static int trace__fprintf_sys_enter(struct trace *trace, struct perf_evsel *evsel, 1964 struct perf_sample *sample) 1965 { 1966 struct thread_trace *ttrace; 1967 struct thread *thread; 1968 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1; 1969 struct syscall *sc = trace__syscall_info(trace, evsel, id); 1970 char msg[1024]; 1971 void *args, *augmented_args = NULL; 1972 int augmented_args_size; 1973 1974 if (sc == NULL) 1975 return -1; 1976 1977 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 1978 ttrace = thread__trace(thread, trace->output); 1979 /* 1980 * We need to get ttrace just to make sure it is there when syscall__scnprintf_args() 1981 * and the rest of the beautifiers accessing it via struct syscall_arg touches it. 1982 */ 1983 if (ttrace == NULL) 1984 goto out_put; 1985 1986 args = perf_evsel__sc_tp_ptr(evsel, args, sample); 1987 augmented_args = syscall__augmented_args(sc, sample, &augmented_args_size, trace->raw_augmented_syscalls_args_size); 1988 syscall__scnprintf_args(sc, msg, sizeof(msg), args, augmented_args, augmented_args_size, trace, thread); 1989 fprintf(trace->output, "%s", msg); 1990 err = 0; 1991 out_put: 1992 thread__put(thread); 1993 return err; 1994 } 1995 1996 static int trace__resolve_callchain(struct trace *trace, struct perf_evsel *evsel, 1997 struct perf_sample *sample, 1998 struct callchain_cursor *cursor) 1999 { 2000 struct addr_location al; 2001 int max_stack = evsel->attr.sample_max_stack ? 2002 evsel->attr.sample_max_stack : 2003 trace->max_stack; 2004 int err; 2005 2006 if (machine__resolve(trace->host, &al, sample) < 0) 2007 return -1; 2008 2009 err = thread__resolve_callchain(al.thread, cursor, evsel, sample, NULL, NULL, max_stack); 2010 addr_location__put(&al); 2011 return err; 2012 } 2013 2014 static int trace__fprintf_callchain(struct trace *trace, struct perf_sample *sample) 2015 { 2016 /* TODO: user-configurable print_opts */ 2017 const unsigned int print_opts = EVSEL__PRINT_SYM | 2018 EVSEL__PRINT_DSO | 2019 EVSEL__PRINT_UNKNOWN_AS_ADDR; 2020 2021 return sample__fprintf_callchain(sample, 38, print_opts, &callchain_cursor, trace->output); 2022 } 2023 2024 static const char *errno_to_name(struct perf_evsel *evsel, int err) 2025 { 2026 struct perf_env *env = perf_evsel__env(evsel); 2027 const char *arch_name = perf_env__arch(env); 2028 2029 return arch_syscalls__strerrno(arch_name, err); 2030 } 2031 2032 static int trace__sys_exit(struct trace *trace, struct perf_evsel *evsel, 2033 union perf_event *event __maybe_unused, 2034 struct perf_sample *sample) 2035 { 2036 long ret; 2037 u64 duration = 0; 2038 bool duration_calculated = false; 2039 struct thread *thread; 2040 int id = perf_evsel__sc_tp_uint(evsel, id, sample), err = -1, callchain_ret = 0, printed = 0; 2041 int alignment = trace->args_alignment; 2042 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2043 struct thread_trace *ttrace; 2044 2045 if (sc == NULL) 2046 return -1; 2047 2048 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2049 ttrace = thread__trace(thread, trace->output); 2050 if (ttrace == NULL) 2051 goto out_put; 2052 2053 trace__fprintf_sample(trace, evsel, sample, thread); 2054 2055 if (trace->summary) 2056 thread__update_stats(ttrace, id, sample); 2057 2058 ret = perf_evsel__sc_tp_uint(evsel, ret, sample); 2059 2060 if (sc->is_open && ret >= 0 && ttrace->filename.pending_open) { 2061 trace__set_fd_pathname(thread, ret, ttrace->filename.name); 2062 ttrace->filename.pending_open = false; 2063 ++trace->stats.vfs_getname; 2064 } 2065 2066 if (ttrace->entry_time) { 2067 duration = sample->time - ttrace->entry_time; 2068 if (trace__filter_duration(trace, duration)) 2069 goto out; 2070 duration_calculated = true; 2071 } else if (trace->duration_filter) 2072 goto out; 2073 2074 if (sample->callchain) { 2075 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2076 if (callchain_ret == 0) { 2077 if (callchain_cursor.nr < trace->min_stack) 2078 goto out; 2079 callchain_ret = 1; 2080 } 2081 } 2082 2083 if (trace->summary_only || (ret >= 0 && trace->failure_only)) 2084 goto out; 2085 2086 trace__fprintf_entry_head(trace, thread, duration, duration_calculated, ttrace->entry_time, trace->output); 2087 2088 if (ttrace->entry_pending) { 2089 printed = fprintf(trace->output, "%s", ttrace->entry_str); 2090 } else { 2091 printed += fprintf(trace->output, " ... ["); 2092 color_fprintf(trace->output, PERF_COLOR_YELLOW, "continued"); 2093 printed += 9; 2094 printed += fprintf(trace->output, "]: %s()", sc->name); 2095 } 2096 2097 printed++; /* the closing ')' */ 2098 2099 if (alignment > printed) 2100 alignment -= printed; 2101 else 2102 alignment = 0; 2103 2104 fprintf(trace->output, ")%*s= ", alignment, " "); 2105 2106 if (sc->fmt == NULL) { 2107 if (ret < 0) 2108 goto errno_print; 2109 signed_print: 2110 fprintf(trace->output, "%ld", ret); 2111 } else if (ret < 0) { 2112 errno_print: { 2113 char bf[STRERR_BUFSIZE]; 2114 const char *emsg = str_error_r(-ret, bf, sizeof(bf)), 2115 *e = errno_to_name(evsel, -ret); 2116 2117 fprintf(trace->output, "-1 %s (%s)", e, emsg); 2118 } 2119 } else if (ret == 0 && sc->fmt->timeout) 2120 fprintf(trace->output, "0 (Timeout)"); 2121 else if (ttrace->ret_scnprintf) { 2122 char bf[1024]; 2123 struct syscall_arg arg = { 2124 .val = ret, 2125 .thread = thread, 2126 .trace = trace, 2127 }; 2128 ttrace->ret_scnprintf(bf, sizeof(bf), &arg); 2129 ttrace->ret_scnprintf = NULL; 2130 fprintf(trace->output, "%s", bf); 2131 } else if (sc->fmt->hexret) 2132 fprintf(trace->output, "%#lx", ret); 2133 else if (sc->fmt->errpid) { 2134 struct thread *child = machine__find_thread(trace->host, ret, ret); 2135 2136 if (child != NULL) { 2137 fprintf(trace->output, "%ld", ret); 2138 if (child->comm_set) 2139 fprintf(trace->output, " (%s)", thread__comm_str(child)); 2140 thread__put(child); 2141 } 2142 } else 2143 goto signed_print; 2144 2145 fputc('\n', trace->output); 2146 2147 /* 2148 * We only consider an 'event' for the sake of --max-events a non-filtered 2149 * sys_enter + sys_exit and other tracepoint events. 2150 */ 2151 if (++trace->nr_events_printed == trace->max_events && trace->max_events != ULONG_MAX) 2152 interrupted = true; 2153 2154 if (callchain_ret > 0) 2155 trace__fprintf_callchain(trace, sample); 2156 else if (callchain_ret < 0) 2157 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2158 out: 2159 ttrace->entry_pending = false; 2160 err = 0; 2161 out_put: 2162 thread__put(thread); 2163 return err; 2164 } 2165 2166 static int trace__vfs_getname(struct trace *trace, struct perf_evsel *evsel, 2167 union perf_event *event __maybe_unused, 2168 struct perf_sample *sample) 2169 { 2170 struct thread *thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2171 struct thread_trace *ttrace; 2172 size_t filename_len, entry_str_len, to_move; 2173 ssize_t remaining_space; 2174 char *pos; 2175 const char *filename = perf_evsel__rawptr(evsel, sample, "pathname"); 2176 2177 if (!thread) 2178 goto out; 2179 2180 ttrace = thread__priv(thread); 2181 if (!ttrace) 2182 goto out_put; 2183 2184 filename_len = strlen(filename); 2185 if (filename_len == 0) 2186 goto out_put; 2187 2188 if (ttrace->filename.namelen < filename_len) { 2189 char *f = realloc(ttrace->filename.name, filename_len + 1); 2190 2191 if (f == NULL) 2192 goto out_put; 2193 2194 ttrace->filename.namelen = filename_len; 2195 ttrace->filename.name = f; 2196 } 2197 2198 strcpy(ttrace->filename.name, filename); 2199 ttrace->filename.pending_open = true; 2200 2201 if (!ttrace->filename.ptr) 2202 goto out_put; 2203 2204 entry_str_len = strlen(ttrace->entry_str); 2205 remaining_space = trace__entry_str_size - entry_str_len - 1; /* \0 */ 2206 if (remaining_space <= 0) 2207 goto out_put; 2208 2209 if (filename_len > (size_t)remaining_space) { 2210 filename += filename_len - remaining_space; 2211 filename_len = remaining_space; 2212 } 2213 2214 to_move = entry_str_len - ttrace->filename.entry_str_pos + 1; /* \0 */ 2215 pos = ttrace->entry_str + ttrace->filename.entry_str_pos; 2216 memmove(pos + filename_len, pos, to_move); 2217 memcpy(pos, filename, filename_len); 2218 2219 ttrace->filename.ptr = 0; 2220 ttrace->filename.entry_str_pos = 0; 2221 out_put: 2222 thread__put(thread); 2223 out: 2224 return 0; 2225 } 2226 2227 static int trace__sched_stat_runtime(struct trace *trace, struct perf_evsel *evsel, 2228 union perf_event *event __maybe_unused, 2229 struct perf_sample *sample) 2230 { 2231 u64 runtime = perf_evsel__intval(evsel, sample, "runtime"); 2232 double runtime_ms = (double)runtime / NSEC_PER_MSEC; 2233 struct thread *thread = machine__findnew_thread(trace->host, 2234 sample->pid, 2235 sample->tid); 2236 struct thread_trace *ttrace = thread__trace(thread, trace->output); 2237 2238 if (ttrace == NULL) 2239 goto out_dump; 2240 2241 ttrace->runtime_ms += runtime_ms; 2242 trace->runtime_ms += runtime_ms; 2243 out_put: 2244 thread__put(thread); 2245 return 0; 2246 2247 out_dump: 2248 fprintf(trace->output, "%s: comm=%s,pid=%u,runtime=%" PRIu64 ",vruntime=%" PRIu64 ")\n", 2249 evsel->name, 2250 perf_evsel__strval(evsel, sample, "comm"), 2251 (pid_t)perf_evsel__intval(evsel, sample, "pid"), 2252 runtime, 2253 perf_evsel__intval(evsel, sample, "vruntime")); 2254 goto out_put; 2255 } 2256 2257 static int bpf_output__printer(enum binary_printer_ops op, 2258 unsigned int val, void *extra __maybe_unused, FILE *fp) 2259 { 2260 unsigned char ch = (unsigned char)val; 2261 2262 switch (op) { 2263 case BINARY_PRINT_CHAR_DATA: 2264 return fprintf(fp, "%c", isprint(ch) ? ch : '.'); 2265 case BINARY_PRINT_DATA_BEGIN: 2266 case BINARY_PRINT_LINE_BEGIN: 2267 case BINARY_PRINT_ADDR: 2268 case BINARY_PRINT_NUM_DATA: 2269 case BINARY_PRINT_NUM_PAD: 2270 case BINARY_PRINT_SEP: 2271 case BINARY_PRINT_CHAR_PAD: 2272 case BINARY_PRINT_LINE_END: 2273 case BINARY_PRINT_DATA_END: 2274 default: 2275 break; 2276 } 2277 2278 return 0; 2279 } 2280 2281 static void bpf_output__fprintf(struct trace *trace, 2282 struct perf_sample *sample) 2283 { 2284 binary__fprintf(sample->raw_data, sample->raw_size, 8, 2285 bpf_output__printer, NULL, trace->output); 2286 ++trace->nr_events_printed; 2287 } 2288 2289 static int trace__event_handler(struct trace *trace, struct perf_evsel *evsel, 2290 union perf_event *event __maybe_unused, 2291 struct perf_sample *sample) 2292 { 2293 struct thread *thread; 2294 int callchain_ret = 0; 2295 /* 2296 * Check if we called perf_evsel__disable(evsel) due to, for instance, 2297 * this event's max_events having been hit and this is an entry coming 2298 * from the ring buffer that we should discard, since the max events 2299 * have already been considered/printed. 2300 */ 2301 if (evsel->disabled) 2302 return 0; 2303 2304 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2305 2306 if (sample->callchain) { 2307 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2308 if (callchain_ret == 0) { 2309 if (callchain_cursor.nr < trace->min_stack) 2310 goto out; 2311 callchain_ret = 1; 2312 } 2313 } 2314 2315 trace__printf_interrupted_entry(trace); 2316 trace__fprintf_tstamp(trace, sample->time, trace->output); 2317 2318 if (trace->trace_syscalls && trace->show_duration) 2319 fprintf(trace->output, "( ): "); 2320 2321 if (thread) 2322 trace__fprintf_comm_tid(trace, thread, trace->output); 2323 2324 if (evsel == trace->syscalls.events.augmented) { 2325 int id = perf_evsel__sc_tp_uint(evsel, id, sample); 2326 struct syscall *sc = trace__syscall_info(trace, evsel, id); 2327 2328 if (sc) { 2329 fprintf(trace->output, "%s(", sc->name); 2330 trace__fprintf_sys_enter(trace, evsel, sample); 2331 fputc(')', trace->output); 2332 goto newline; 2333 } 2334 2335 /* 2336 * XXX: Not having the associated syscall info or not finding/adding 2337 * the thread should never happen, but if it does... 2338 * fall thru and print it as a bpf_output event. 2339 */ 2340 } 2341 2342 fprintf(trace->output, "%s:", evsel->name); 2343 2344 if (perf_evsel__is_bpf_output(evsel)) { 2345 bpf_output__fprintf(trace, sample); 2346 } else if (evsel->tp_format) { 2347 if (strncmp(evsel->tp_format->name, "sys_enter_", 10) || 2348 trace__fprintf_sys_enter(trace, evsel, sample)) { 2349 event_format__fprintf(evsel->tp_format, sample->cpu, 2350 sample->raw_data, sample->raw_size, 2351 trace->output); 2352 ++trace->nr_events_printed; 2353 2354 if (evsel->max_events != ULONG_MAX && ++evsel->nr_events_printed == evsel->max_events) { 2355 perf_evsel__disable(evsel); 2356 perf_evsel__close(evsel); 2357 } 2358 } 2359 } 2360 2361 newline: 2362 fprintf(trace->output, "\n"); 2363 2364 if (callchain_ret > 0) 2365 trace__fprintf_callchain(trace, sample); 2366 else if (callchain_ret < 0) 2367 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2368 out: 2369 thread__put(thread); 2370 return 0; 2371 } 2372 2373 static void print_location(FILE *f, struct perf_sample *sample, 2374 struct addr_location *al, 2375 bool print_dso, bool print_sym) 2376 { 2377 2378 if ((verbose > 0 || print_dso) && al->map) 2379 fprintf(f, "%s@", al->map->dso->long_name); 2380 2381 if ((verbose > 0 || print_sym) && al->sym) 2382 fprintf(f, "%s+0x%" PRIx64, al->sym->name, 2383 al->addr - al->sym->start); 2384 else if (al->map) 2385 fprintf(f, "0x%" PRIx64, al->addr); 2386 else 2387 fprintf(f, "0x%" PRIx64, sample->addr); 2388 } 2389 2390 static int trace__pgfault(struct trace *trace, 2391 struct perf_evsel *evsel, 2392 union perf_event *event __maybe_unused, 2393 struct perf_sample *sample) 2394 { 2395 struct thread *thread; 2396 struct addr_location al; 2397 char map_type = 'd'; 2398 struct thread_trace *ttrace; 2399 int err = -1; 2400 int callchain_ret = 0; 2401 2402 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2403 2404 if (sample->callchain) { 2405 callchain_ret = trace__resolve_callchain(trace, evsel, sample, &callchain_cursor); 2406 if (callchain_ret == 0) { 2407 if (callchain_cursor.nr < trace->min_stack) 2408 goto out_put; 2409 callchain_ret = 1; 2410 } 2411 } 2412 2413 ttrace = thread__trace(thread, trace->output); 2414 if (ttrace == NULL) 2415 goto out_put; 2416 2417 if (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ) 2418 ttrace->pfmaj++; 2419 else 2420 ttrace->pfmin++; 2421 2422 if (trace->summary_only) 2423 goto out; 2424 2425 thread__find_symbol(thread, sample->cpumode, sample->ip, &al); 2426 2427 trace__fprintf_entry_head(trace, thread, 0, true, sample->time, trace->output); 2428 2429 fprintf(trace->output, "%sfault [", 2430 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ ? 2431 "maj" : "min"); 2432 2433 print_location(trace->output, sample, &al, false, true); 2434 2435 fprintf(trace->output, "] => "); 2436 2437 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2438 2439 if (!al.map) { 2440 thread__find_symbol(thread, sample->cpumode, sample->addr, &al); 2441 2442 if (al.map) 2443 map_type = 'x'; 2444 else 2445 map_type = '?'; 2446 } 2447 2448 print_location(trace->output, sample, &al, true, false); 2449 2450 fprintf(trace->output, " (%c%c)\n", map_type, al.level); 2451 2452 if (callchain_ret > 0) 2453 trace__fprintf_callchain(trace, sample); 2454 else if (callchain_ret < 0) 2455 pr_err("Problem processing %s callchain, skipping...\n", perf_evsel__name(evsel)); 2456 2457 ++trace->nr_events_printed; 2458 out: 2459 err = 0; 2460 out_put: 2461 thread__put(thread); 2462 return err; 2463 } 2464 2465 static void trace__set_base_time(struct trace *trace, 2466 struct perf_evsel *evsel, 2467 struct perf_sample *sample) 2468 { 2469 /* 2470 * BPF events were not setting PERF_SAMPLE_TIME, so be more robust 2471 * and don't use sample->time unconditionally, we may end up having 2472 * some other event in the future without PERF_SAMPLE_TIME for good 2473 * reason, i.e. we may not be interested in its timestamps, just in 2474 * it taking place, picking some piece of information when it 2475 * appears in our event stream (vfs_getname comes to mind). 2476 */ 2477 if (trace->base_time == 0 && !trace->full_time && 2478 (evsel->attr.sample_type & PERF_SAMPLE_TIME)) 2479 trace->base_time = sample->time; 2480 } 2481 2482 static int trace__process_sample(struct perf_tool *tool, 2483 union perf_event *event, 2484 struct perf_sample *sample, 2485 struct perf_evsel *evsel, 2486 struct machine *machine __maybe_unused) 2487 { 2488 struct trace *trace = container_of(tool, struct trace, tool); 2489 struct thread *thread; 2490 int err = 0; 2491 2492 tracepoint_handler handler = evsel->handler; 2493 2494 thread = machine__findnew_thread(trace->host, sample->pid, sample->tid); 2495 if (thread && thread__is_filtered(thread)) 2496 goto out; 2497 2498 trace__set_base_time(trace, evsel, sample); 2499 2500 if (handler) { 2501 ++trace->nr_events; 2502 handler(trace, evsel, event, sample); 2503 } 2504 out: 2505 thread__put(thread); 2506 return err; 2507 } 2508 2509 static int trace__record(struct trace *trace, int argc, const char **argv) 2510 { 2511 unsigned int rec_argc, i, j; 2512 const char **rec_argv; 2513 const char * const record_args[] = { 2514 "record", 2515 "-R", 2516 "-m", "1024", 2517 "-c", "1", 2518 }; 2519 2520 const char * const sc_args[] = { "-e", }; 2521 unsigned int sc_args_nr = ARRAY_SIZE(sc_args); 2522 const char * const majpf_args[] = { "-e", "major-faults" }; 2523 unsigned int majpf_args_nr = ARRAY_SIZE(majpf_args); 2524 const char * const minpf_args[] = { "-e", "minor-faults" }; 2525 unsigned int minpf_args_nr = ARRAY_SIZE(minpf_args); 2526 2527 /* +1 is for the event string below */ 2528 rec_argc = ARRAY_SIZE(record_args) + sc_args_nr + 1 + 2529 majpf_args_nr + minpf_args_nr + argc; 2530 rec_argv = calloc(rec_argc + 1, sizeof(char *)); 2531 2532 if (rec_argv == NULL) 2533 return -ENOMEM; 2534 2535 j = 0; 2536 for (i = 0; i < ARRAY_SIZE(record_args); i++) 2537 rec_argv[j++] = record_args[i]; 2538 2539 if (trace->trace_syscalls) { 2540 for (i = 0; i < sc_args_nr; i++) 2541 rec_argv[j++] = sc_args[i]; 2542 2543 /* event string may be different for older kernels - e.g., RHEL6 */ 2544 if (is_valid_tracepoint("raw_syscalls:sys_enter")) 2545 rec_argv[j++] = "raw_syscalls:sys_enter,raw_syscalls:sys_exit"; 2546 else if (is_valid_tracepoint("syscalls:sys_enter")) 2547 rec_argv[j++] = "syscalls:sys_enter,syscalls:sys_exit"; 2548 else { 2549 pr_err("Neither raw_syscalls nor syscalls events exist.\n"); 2550 free(rec_argv); 2551 return -1; 2552 } 2553 } 2554 2555 if (trace->trace_pgfaults & TRACE_PFMAJ) 2556 for (i = 0; i < majpf_args_nr; i++) 2557 rec_argv[j++] = majpf_args[i]; 2558 2559 if (trace->trace_pgfaults & TRACE_PFMIN) 2560 for (i = 0; i < minpf_args_nr; i++) 2561 rec_argv[j++] = minpf_args[i]; 2562 2563 for (i = 0; i < (unsigned int)argc; i++) 2564 rec_argv[j++] = argv[i]; 2565 2566 return cmd_record(j, rec_argv); 2567 } 2568 2569 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp); 2570 2571 static bool perf_evlist__add_vfs_getname(struct perf_evlist *evlist) 2572 { 2573 bool found = false; 2574 struct perf_evsel *evsel, *tmp; 2575 struct parse_events_error err = { .idx = 0, }; 2576 int ret = parse_events(evlist, "probe:vfs_getname*", &err); 2577 2578 if (ret) 2579 return false; 2580 2581 evlist__for_each_entry_safe(evlist, evsel, tmp) { 2582 if (!strstarts(perf_evsel__name(evsel), "probe:vfs_getname")) 2583 continue; 2584 2585 if (perf_evsel__field(evsel, "pathname")) { 2586 evsel->handler = trace__vfs_getname; 2587 found = true; 2588 continue; 2589 } 2590 2591 list_del_init(&evsel->node); 2592 evsel->evlist = NULL; 2593 perf_evsel__delete(evsel); 2594 } 2595 2596 return found; 2597 } 2598 2599 static struct perf_evsel *perf_evsel__new_pgfault(u64 config) 2600 { 2601 struct perf_evsel *evsel; 2602 struct perf_event_attr attr = { 2603 .type = PERF_TYPE_SOFTWARE, 2604 .mmap_data = 1, 2605 }; 2606 2607 attr.config = config; 2608 attr.sample_period = 1; 2609 2610 event_attr_init(&attr); 2611 2612 evsel = perf_evsel__new(&attr); 2613 if (evsel) 2614 evsel->handler = trace__pgfault; 2615 2616 return evsel; 2617 } 2618 2619 static void trace__handle_event(struct trace *trace, union perf_event *event, struct perf_sample *sample) 2620 { 2621 const u32 type = event->header.type; 2622 struct perf_evsel *evsel; 2623 2624 if (type != PERF_RECORD_SAMPLE) { 2625 trace__process_event(trace, trace->host, event, sample); 2626 return; 2627 } 2628 2629 evsel = perf_evlist__id2evsel(trace->evlist, sample->id); 2630 if (evsel == NULL) { 2631 fprintf(trace->output, "Unknown tp ID %" PRIu64 ", skipping...\n", sample->id); 2632 return; 2633 } 2634 2635 trace__set_base_time(trace, evsel, sample); 2636 2637 if (evsel->attr.type == PERF_TYPE_TRACEPOINT && 2638 sample->raw_data == NULL) { 2639 fprintf(trace->output, "%s sample with no payload for tid: %d, cpu %d, raw_size=%d, skipping...\n", 2640 perf_evsel__name(evsel), sample->tid, 2641 sample->cpu, sample->raw_size); 2642 } else { 2643 tracepoint_handler handler = evsel->handler; 2644 handler(trace, evsel, event, sample); 2645 } 2646 2647 if (trace->nr_events_printed >= trace->max_events && trace->max_events != ULONG_MAX) 2648 interrupted = true; 2649 } 2650 2651 static int trace__add_syscall_newtp(struct trace *trace) 2652 { 2653 int ret = -1; 2654 struct perf_evlist *evlist = trace->evlist; 2655 struct perf_evsel *sys_enter, *sys_exit; 2656 2657 sys_enter = perf_evsel__raw_syscall_newtp("sys_enter", trace__sys_enter); 2658 if (sys_enter == NULL) 2659 goto out; 2660 2661 if (perf_evsel__init_sc_tp_ptr_field(sys_enter, args)) 2662 goto out_delete_sys_enter; 2663 2664 sys_exit = perf_evsel__raw_syscall_newtp("sys_exit", trace__sys_exit); 2665 if (sys_exit == NULL) 2666 goto out_delete_sys_enter; 2667 2668 if (perf_evsel__init_sc_tp_uint_field(sys_exit, ret)) 2669 goto out_delete_sys_exit; 2670 2671 perf_evsel__config_callchain(sys_enter, &trace->opts, &callchain_param); 2672 perf_evsel__config_callchain(sys_exit, &trace->opts, &callchain_param); 2673 2674 perf_evlist__add(evlist, sys_enter); 2675 perf_evlist__add(evlist, sys_exit); 2676 2677 if (callchain_param.enabled && !trace->kernel_syscallchains) { 2678 /* 2679 * We're interested only in the user space callchain 2680 * leading to the syscall, allow overriding that for 2681 * debugging reasons using --kernel_syscall_callchains 2682 */ 2683 sys_exit->attr.exclude_callchain_kernel = 1; 2684 } 2685 2686 trace->syscalls.events.sys_enter = sys_enter; 2687 trace->syscalls.events.sys_exit = sys_exit; 2688 2689 ret = 0; 2690 out: 2691 return ret; 2692 2693 out_delete_sys_exit: 2694 perf_evsel__delete_priv(sys_exit); 2695 out_delete_sys_enter: 2696 perf_evsel__delete_priv(sys_enter); 2697 goto out; 2698 } 2699 2700 static int trace__set_ev_qualifier_tp_filter(struct trace *trace) 2701 { 2702 int err = -1; 2703 struct perf_evsel *sys_exit; 2704 char *filter = asprintf_expr_inout_ints("id", !trace->not_ev_qualifier, 2705 trace->ev_qualifier_ids.nr, 2706 trace->ev_qualifier_ids.entries); 2707 2708 if (filter == NULL) 2709 goto out_enomem; 2710 2711 if (!perf_evsel__append_tp_filter(trace->syscalls.events.sys_enter, 2712 filter)) { 2713 sys_exit = trace->syscalls.events.sys_exit; 2714 err = perf_evsel__append_tp_filter(sys_exit, filter); 2715 } 2716 2717 free(filter); 2718 out: 2719 return err; 2720 out_enomem: 2721 errno = ENOMEM; 2722 goto out; 2723 } 2724 2725 #ifdef HAVE_LIBBPF_SUPPORT 2726 static void trace__init_bpf_map_syscall_args(struct trace *trace, int id, struct bpf_map_syscall_entry *entry) 2727 { 2728 struct syscall *sc = trace__syscall_info(trace, NULL, id); 2729 int arg = 0; 2730 2731 if (sc == NULL) 2732 goto out; 2733 2734 for (; arg < sc->nr_args; ++arg) { 2735 entry->string_args_len[arg] = 0; 2736 if (sc->arg_fmt[arg].scnprintf == SCA_FILENAME) { 2737 /* Should be set like strace -s strsize */ 2738 entry->string_args_len[arg] = PATH_MAX; 2739 } 2740 } 2741 out: 2742 for (; arg < 6; ++arg) 2743 entry->string_args_len[arg] = 0; 2744 } 2745 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace) 2746 { 2747 int fd = bpf_map__fd(trace->syscalls.map); 2748 struct bpf_map_syscall_entry value = { 2749 .enabled = !trace->not_ev_qualifier, 2750 }; 2751 int err = 0; 2752 size_t i; 2753 2754 for (i = 0; i < trace->ev_qualifier_ids.nr; ++i) { 2755 int key = trace->ev_qualifier_ids.entries[i]; 2756 2757 if (value.enabled) 2758 trace__init_bpf_map_syscall_args(trace, key, &value); 2759 2760 err = bpf_map_update_elem(fd, &key, &value, BPF_EXIST); 2761 if (err) 2762 break; 2763 } 2764 2765 return err; 2766 } 2767 2768 static int __trace__init_syscalls_bpf_map(struct trace *trace, bool enabled) 2769 { 2770 int fd = bpf_map__fd(trace->syscalls.map); 2771 struct bpf_map_syscall_entry value = { 2772 .enabled = enabled, 2773 }; 2774 int err = 0, key; 2775 2776 for (key = 0; key < trace->sctbl->syscalls.nr_entries; ++key) { 2777 if (enabled) 2778 trace__init_bpf_map_syscall_args(trace, key, &value); 2779 2780 err = bpf_map_update_elem(fd, &key, &value, BPF_ANY); 2781 if (err) 2782 break; 2783 } 2784 2785 return err; 2786 } 2787 2788 static int trace__init_syscalls_bpf_map(struct trace *trace) 2789 { 2790 bool enabled = true; 2791 2792 if (trace->ev_qualifier_ids.nr) 2793 enabled = trace->not_ev_qualifier; 2794 2795 return __trace__init_syscalls_bpf_map(trace, enabled); 2796 } 2797 #else 2798 static int trace__set_ev_qualifier_bpf_filter(struct trace *trace __maybe_unused) 2799 { 2800 return 0; 2801 } 2802 2803 static int trace__init_syscalls_bpf_map(struct trace *trace __maybe_unused) 2804 { 2805 return 0; 2806 } 2807 #endif // HAVE_LIBBPF_SUPPORT 2808 2809 static int trace__set_ev_qualifier_filter(struct trace *trace) 2810 { 2811 if (trace->syscalls.map) 2812 return trace__set_ev_qualifier_bpf_filter(trace); 2813 if (trace->syscalls.events.sys_enter) 2814 return trace__set_ev_qualifier_tp_filter(trace); 2815 return 0; 2816 } 2817 2818 static int bpf_map__set_filter_pids(struct bpf_map *map __maybe_unused, 2819 size_t npids __maybe_unused, pid_t *pids __maybe_unused) 2820 { 2821 int err = 0; 2822 #ifdef HAVE_LIBBPF_SUPPORT 2823 bool value = true; 2824 int map_fd = bpf_map__fd(map); 2825 size_t i; 2826 2827 for (i = 0; i < npids; ++i) { 2828 err = bpf_map_update_elem(map_fd, &pids[i], &value, BPF_ANY); 2829 if (err) 2830 break; 2831 } 2832 #endif 2833 return err; 2834 } 2835 2836 static int trace__set_filter_loop_pids(struct trace *trace) 2837 { 2838 unsigned int nr = 1, err; 2839 pid_t pids[32] = { 2840 getpid(), 2841 }; 2842 struct thread *thread = machine__find_thread(trace->host, pids[0], pids[0]); 2843 2844 while (thread && nr < ARRAY_SIZE(pids)) { 2845 struct thread *parent = machine__find_thread(trace->host, thread->ppid, thread->ppid); 2846 2847 if (parent == NULL) 2848 break; 2849 2850 if (!strcmp(thread__comm_str(parent), "sshd") || 2851 strstarts(thread__comm_str(parent), "gnome-terminal")) { 2852 pids[nr++] = parent->tid; 2853 break; 2854 } 2855 thread = parent; 2856 } 2857 2858 err = perf_evlist__set_tp_filter_pids(trace->evlist, nr, pids); 2859 if (!err && trace->filter_pids.map) 2860 err = bpf_map__set_filter_pids(trace->filter_pids.map, nr, pids); 2861 2862 return err; 2863 } 2864 2865 static int trace__set_filter_pids(struct trace *trace) 2866 { 2867 int err = 0; 2868 /* 2869 * Better not use !target__has_task() here because we need to cover the 2870 * case where no threads were specified in the command line, but a 2871 * workload was, and in that case we will fill in the thread_map when 2872 * we fork the workload in perf_evlist__prepare_workload. 2873 */ 2874 if (trace->filter_pids.nr > 0) { 2875 err = perf_evlist__set_tp_filter_pids(trace->evlist, trace->filter_pids.nr, 2876 trace->filter_pids.entries); 2877 if (!err && trace->filter_pids.map) { 2878 err = bpf_map__set_filter_pids(trace->filter_pids.map, trace->filter_pids.nr, 2879 trace->filter_pids.entries); 2880 } 2881 } else if (thread_map__pid(trace->evlist->threads, 0) == -1) { 2882 err = trace__set_filter_loop_pids(trace); 2883 } 2884 2885 return err; 2886 } 2887 2888 static int __trace__deliver_event(struct trace *trace, union perf_event *event) 2889 { 2890 struct perf_evlist *evlist = trace->evlist; 2891 struct perf_sample sample; 2892 int err; 2893 2894 err = perf_evlist__parse_sample(evlist, event, &sample); 2895 if (err) 2896 fprintf(trace->output, "Can't parse sample, err = %d, skipping...\n", err); 2897 else 2898 trace__handle_event(trace, event, &sample); 2899 2900 return 0; 2901 } 2902 2903 static int __trace__flush_events(struct trace *trace) 2904 { 2905 u64 first = ordered_events__first_time(&trace->oe.data); 2906 u64 flush = trace->oe.last - NSEC_PER_SEC; 2907 2908 /* Is there some thing to flush.. */ 2909 if (first && first < flush) 2910 return ordered_events__flush_time(&trace->oe.data, flush); 2911 2912 return 0; 2913 } 2914 2915 static int trace__flush_events(struct trace *trace) 2916 { 2917 return !trace->sort_events ? 0 : __trace__flush_events(trace); 2918 } 2919 2920 static int trace__deliver_event(struct trace *trace, union perf_event *event) 2921 { 2922 int err; 2923 2924 if (!trace->sort_events) 2925 return __trace__deliver_event(trace, event); 2926 2927 err = perf_evlist__parse_sample_timestamp(trace->evlist, event, &trace->oe.last); 2928 if (err && err != -1) 2929 return err; 2930 2931 err = ordered_events__queue(&trace->oe.data, event, trace->oe.last, 0); 2932 if (err) 2933 return err; 2934 2935 return trace__flush_events(trace); 2936 } 2937 2938 static int ordered_events__deliver_event(struct ordered_events *oe, 2939 struct ordered_event *event) 2940 { 2941 struct trace *trace = container_of(oe, struct trace, oe.data); 2942 2943 return __trace__deliver_event(trace, event->event); 2944 } 2945 2946 static int trace__run(struct trace *trace, int argc, const char **argv) 2947 { 2948 struct perf_evlist *evlist = trace->evlist; 2949 struct perf_evsel *evsel, *pgfault_maj = NULL, *pgfault_min = NULL; 2950 int err = -1, i; 2951 unsigned long before; 2952 const bool forks = argc > 0; 2953 bool draining = false; 2954 2955 trace->live = true; 2956 2957 if (!trace->raw_augmented_syscalls) { 2958 if (trace->trace_syscalls && trace__add_syscall_newtp(trace)) 2959 goto out_error_raw_syscalls; 2960 2961 if (trace->trace_syscalls) 2962 trace->vfs_getname = perf_evlist__add_vfs_getname(evlist); 2963 } 2964 2965 if ((trace->trace_pgfaults & TRACE_PFMAJ)) { 2966 pgfault_maj = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MAJ); 2967 if (pgfault_maj == NULL) 2968 goto out_error_mem; 2969 perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param); 2970 perf_evlist__add(evlist, pgfault_maj); 2971 } 2972 2973 if ((trace->trace_pgfaults & TRACE_PFMIN)) { 2974 pgfault_min = perf_evsel__new_pgfault(PERF_COUNT_SW_PAGE_FAULTS_MIN); 2975 if (pgfault_min == NULL) 2976 goto out_error_mem; 2977 perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param); 2978 perf_evlist__add(evlist, pgfault_min); 2979 } 2980 2981 if (trace->sched && 2982 perf_evlist__add_newtp(evlist, "sched", "sched_stat_runtime", 2983 trace__sched_stat_runtime)) 2984 goto out_error_sched_stat_runtime; 2985 2986 /* 2987 * If a global cgroup was set, apply it to all the events without an 2988 * explicit cgroup. I.e.: 2989 * 2990 * trace -G A -e sched:*switch 2991 * 2992 * Will set all raw_syscalls:sys_{enter,exit}, pgfault, vfs_getname, etc 2993 * _and_ sched:sched_switch to the 'A' cgroup, while: 2994 * 2995 * trace -e sched:*switch -G A 2996 * 2997 * will only set the sched:sched_switch event to the 'A' cgroup, all the 2998 * other events (raw_syscalls:sys_{enter,exit}, etc are left "without" 2999 * a cgroup (on the root cgroup, sys wide, etc). 3000 * 3001 * Multiple cgroups: 3002 * 3003 * trace -G A -e sched:*switch -G B 3004 * 3005 * the syscall ones go to the 'A' cgroup, the sched:sched_switch goes 3006 * to the 'B' cgroup. 3007 * 3008 * evlist__set_default_cgroup() grabs a reference of the passed cgroup 3009 * only for the evsels still without a cgroup, i.e. evsel->cgroup == NULL. 3010 */ 3011 if (trace->cgroup) 3012 evlist__set_default_cgroup(trace->evlist, trace->cgroup); 3013 3014 err = perf_evlist__create_maps(evlist, &trace->opts.target); 3015 if (err < 0) { 3016 fprintf(trace->output, "Problems parsing the target to trace, check your options!\n"); 3017 goto out_delete_evlist; 3018 } 3019 3020 err = trace__symbols_init(trace, evlist); 3021 if (err < 0) { 3022 fprintf(trace->output, "Problems initializing symbol libraries!\n"); 3023 goto out_delete_evlist; 3024 } 3025 3026 perf_evlist__config(evlist, &trace->opts, &callchain_param); 3027 3028 signal(SIGCHLD, sig_handler); 3029 signal(SIGINT, sig_handler); 3030 3031 if (forks) { 3032 err = perf_evlist__prepare_workload(evlist, &trace->opts.target, 3033 argv, false, NULL); 3034 if (err < 0) { 3035 fprintf(trace->output, "Couldn't run the workload!\n"); 3036 goto out_delete_evlist; 3037 } 3038 } 3039 3040 err = perf_evlist__open(evlist); 3041 if (err < 0) 3042 goto out_error_open; 3043 3044 err = bpf__apply_obj_config(); 3045 if (err) { 3046 char errbuf[BUFSIZ]; 3047 3048 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); 3049 pr_err("ERROR: Apply config to BPF failed: %s\n", 3050 errbuf); 3051 goto out_error_open; 3052 } 3053 3054 err = trace__set_filter_pids(trace); 3055 if (err < 0) 3056 goto out_error_mem; 3057 3058 if (trace->syscalls.map) 3059 trace__init_syscalls_bpf_map(trace); 3060 3061 if (trace->ev_qualifier_ids.nr > 0) { 3062 err = trace__set_ev_qualifier_filter(trace); 3063 if (err < 0) 3064 goto out_errno; 3065 3066 if (trace->syscalls.events.sys_exit) { 3067 pr_debug("event qualifier tracepoint filter: %s\n", 3068 trace->syscalls.events.sys_exit->filter); 3069 } 3070 } 3071 3072 err = perf_evlist__apply_filters(evlist, &evsel); 3073 if (err < 0) 3074 goto out_error_apply_filters; 3075 3076 if (trace->dump.map) 3077 bpf_map__fprintf(trace->dump.map, trace->output); 3078 3079 err = perf_evlist__mmap(evlist, trace->opts.mmap_pages); 3080 if (err < 0) 3081 goto out_error_mmap; 3082 3083 if (!target__none(&trace->opts.target) && !trace->opts.initial_delay) 3084 perf_evlist__enable(evlist); 3085 3086 if (forks) 3087 perf_evlist__start_workload(evlist); 3088 3089 if (trace->opts.initial_delay) { 3090 usleep(trace->opts.initial_delay * 1000); 3091 perf_evlist__enable(evlist); 3092 } 3093 3094 trace->multiple_threads = thread_map__pid(evlist->threads, 0) == -1 || 3095 evlist->threads->nr > 1 || 3096 perf_evlist__first(evlist)->attr.inherit; 3097 3098 /* 3099 * Now that we already used evsel->attr to ask the kernel to setup the 3100 * events, lets reuse evsel->attr.sample_max_stack as the limit in 3101 * trace__resolve_callchain(), allowing per-event max-stack settings 3102 * to override an explicitly set --max-stack global setting. 3103 */ 3104 evlist__for_each_entry(evlist, evsel) { 3105 if (evsel__has_callchain(evsel) && 3106 evsel->attr.sample_max_stack == 0) 3107 evsel->attr.sample_max_stack = trace->max_stack; 3108 } 3109 again: 3110 before = trace->nr_events; 3111 3112 for (i = 0; i < evlist->nr_mmaps; i++) { 3113 union perf_event *event; 3114 struct perf_mmap *md; 3115 3116 md = &evlist->mmap[i]; 3117 if (perf_mmap__read_init(md) < 0) 3118 continue; 3119 3120 while ((event = perf_mmap__read_event(md)) != NULL) { 3121 ++trace->nr_events; 3122 3123 err = trace__deliver_event(trace, event); 3124 if (err) 3125 goto out_disable; 3126 3127 perf_mmap__consume(md); 3128 3129 if (interrupted) 3130 goto out_disable; 3131 3132 if (done && !draining) { 3133 perf_evlist__disable(evlist); 3134 draining = true; 3135 } 3136 } 3137 perf_mmap__read_done(md); 3138 } 3139 3140 if (trace->nr_events == before) { 3141 int timeout = done ? 100 : -1; 3142 3143 if (!draining && perf_evlist__poll(evlist, timeout) > 0) { 3144 if (perf_evlist__filter_pollfd(evlist, POLLERR | POLLHUP | POLLNVAL) == 0) 3145 draining = true; 3146 3147 goto again; 3148 } else { 3149 if (trace__flush_events(trace)) 3150 goto out_disable; 3151 } 3152 } else { 3153 goto again; 3154 } 3155 3156 out_disable: 3157 thread__zput(trace->current); 3158 3159 perf_evlist__disable(evlist); 3160 3161 if (trace->sort_events) 3162 ordered_events__flush(&trace->oe.data, OE_FLUSH__FINAL); 3163 3164 if (!err) { 3165 if (trace->summary) 3166 trace__fprintf_thread_summary(trace, trace->output); 3167 3168 if (trace->show_tool_stats) { 3169 fprintf(trace->output, "Stats:\n " 3170 " vfs_getname : %" PRIu64 "\n" 3171 " proc_getname: %" PRIu64 "\n", 3172 trace->stats.vfs_getname, 3173 trace->stats.proc_getname); 3174 } 3175 } 3176 3177 out_delete_evlist: 3178 trace__symbols__exit(trace); 3179 3180 perf_evlist__delete(evlist); 3181 cgroup__put(trace->cgroup); 3182 trace->evlist = NULL; 3183 trace->live = false; 3184 return err; 3185 { 3186 char errbuf[BUFSIZ]; 3187 3188 out_error_sched_stat_runtime: 3189 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "sched", "sched_stat_runtime"); 3190 goto out_error; 3191 3192 out_error_raw_syscalls: 3193 tracing_path__strerror_open_tp(errno, errbuf, sizeof(errbuf), "raw_syscalls", "sys_(enter|exit)"); 3194 goto out_error; 3195 3196 out_error_mmap: 3197 perf_evlist__strerror_mmap(evlist, errno, errbuf, sizeof(errbuf)); 3198 goto out_error; 3199 3200 out_error_open: 3201 perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf)); 3202 3203 out_error: 3204 fprintf(trace->output, "%s\n", errbuf); 3205 goto out_delete_evlist; 3206 3207 out_error_apply_filters: 3208 fprintf(trace->output, 3209 "Failed to set filter \"%s\" on event %s with %d (%s)\n", 3210 evsel->filter, perf_evsel__name(evsel), errno, 3211 str_error_r(errno, errbuf, sizeof(errbuf))); 3212 goto out_delete_evlist; 3213 } 3214 out_error_mem: 3215 fprintf(trace->output, "Not enough memory to run!\n"); 3216 goto out_delete_evlist; 3217 3218 out_errno: 3219 fprintf(trace->output, "errno=%d,%s\n", errno, strerror(errno)); 3220 goto out_delete_evlist; 3221 } 3222 3223 static int trace__replay(struct trace *trace) 3224 { 3225 const struct perf_evsel_str_handler handlers[] = { 3226 { "probe:vfs_getname", trace__vfs_getname, }, 3227 }; 3228 struct perf_data data = { 3229 .path = input_name, 3230 .mode = PERF_DATA_MODE_READ, 3231 .force = trace->force, 3232 }; 3233 struct perf_session *session; 3234 struct perf_evsel *evsel; 3235 int err = -1; 3236 3237 trace->tool.sample = trace__process_sample; 3238 trace->tool.mmap = perf_event__process_mmap; 3239 trace->tool.mmap2 = perf_event__process_mmap2; 3240 trace->tool.comm = perf_event__process_comm; 3241 trace->tool.exit = perf_event__process_exit; 3242 trace->tool.fork = perf_event__process_fork; 3243 trace->tool.attr = perf_event__process_attr; 3244 trace->tool.tracing_data = perf_event__process_tracing_data; 3245 trace->tool.build_id = perf_event__process_build_id; 3246 trace->tool.namespaces = perf_event__process_namespaces; 3247 3248 trace->tool.ordered_events = true; 3249 trace->tool.ordering_requires_timestamps = true; 3250 3251 /* add tid to output */ 3252 trace->multiple_threads = true; 3253 3254 session = perf_session__new(&data, false, &trace->tool); 3255 if (session == NULL) 3256 return -1; 3257 3258 if (trace->opts.target.pid) 3259 symbol_conf.pid_list_str = strdup(trace->opts.target.pid); 3260 3261 if (trace->opts.target.tid) 3262 symbol_conf.tid_list_str = strdup(trace->opts.target.tid); 3263 3264 if (symbol__init(&session->header.env) < 0) 3265 goto out; 3266 3267 trace->host = &session->machines.host; 3268 3269 err = perf_session__set_tracepoints_handlers(session, handlers); 3270 if (err) 3271 goto out; 3272 3273 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3274 "raw_syscalls:sys_enter"); 3275 /* older kernels have syscalls tp versus raw_syscalls */ 3276 if (evsel == NULL) 3277 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3278 "syscalls:sys_enter"); 3279 3280 if (evsel && 3281 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_enter) < 0 || 3282 perf_evsel__init_sc_tp_ptr_field(evsel, args))) { 3283 pr_err("Error during initialize raw_syscalls:sys_enter event\n"); 3284 goto out; 3285 } 3286 3287 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3288 "raw_syscalls:sys_exit"); 3289 if (evsel == NULL) 3290 evsel = perf_evlist__find_tracepoint_by_name(session->evlist, 3291 "syscalls:sys_exit"); 3292 if (evsel && 3293 (perf_evsel__init_raw_syscall_tp(evsel, trace__sys_exit) < 0 || 3294 perf_evsel__init_sc_tp_uint_field(evsel, ret))) { 3295 pr_err("Error during initialize raw_syscalls:sys_exit event\n"); 3296 goto out; 3297 } 3298 3299 evlist__for_each_entry(session->evlist, evsel) { 3300 if (evsel->attr.type == PERF_TYPE_SOFTWARE && 3301 (evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MAJ || 3302 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS_MIN || 3303 evsel->attr.config == PERF_COUNT_SW_PAGE_FAULTS)) 3304 evsel->handler = trace__pgfault; 3305 } 3306 3307 setup_pager(); 3308 3309 err = perf_session__process_events(session); 3310 if (err) 3311 pr_err("Failed to process events, error %d", err); 3312 3313 else if (trace->summary) 3314 trace__fprintf_thread_summary(trace, trace->output); 3315 3316 out: 3317 perf_session__delete(session); 3318 3319 return err; 3320 } 3321 3322 static size_t trace__fprintf_threads_header(FILE *fp) 3323 { 3324 size_t printed; 3325 3326 printed = fprintf(fp, "\n Summary of events:\n\n"); 3327 3328 return printed; 3329 } 3330 3331 DEFINE_RESORT_RB(syscall_stats, a->msecs > b->msecs, 3332 struct stats *stats; 3333 double msecs; 3334 int syscall; 3335 ) 3336 { 3337 struct int_node *source = rb_entry(nd, struct int_node, rb_node); 3338 struct stats *stats = source->priv; 3339 3340 entry->syscall = source->i; 3341 entry->stats = stats; 3342 entry->msecs = stats ? (u64)stats->n * (avg_stats(stats) / NSEC_PER_MSEC) : 0; 3343 } 3344 3345 static size_t thread__dump_stats(struct thread_trace *ttrace, 3346 struct trace *trace, FILE *fp) 3347 { 3348 size_t printed = 0; 3349 struct syscall *sc; 3350 struct rb_node *nd; 3351 DECLARE_RESORT_RB_INTLIST(syscall_stats, ttrace->syscall_stats); 3352 3353 if (syscall_stats == NULL) 3354 return 0; 3355 3356 printed += fprintf(fp, "\n"); 3357 3358 printed += fprintf(fp, " syscall calls total min avg max stddev\n"); 3359 printed += fprintf(fp, " (msec) (msec) (msec) (msec) (%%)\n"); 3360 printed += fprintf(fp, " --------------- -------- --------- --------- --------- --------- ------\n"); 3361 3362 resort_rb__for_each_entry(nd, syscall_stats) { 3363 struct stats *stats = syscall_stats_entry->stats; 3364 if (stats) { 3365 double min = (double)(stats->min) / NSEC_PER_MSEC; 3366 double max = (double)(stats->max) / NSEC_PER_MSEC; 3367 double avg = avg_stats(stats); 3368 double pct; 3369 u64 n = (u64) stats->n; 3370 3371 pct = avg ? 100.0 * stddev_stats(stats)/avg : 0.0; 3372 avg /= NSEC_PER_MSEC; 3373 3374 sc = &trace->syscalls.table[syscall_stats_entry->syscall]; 3375 printed += fprintf(fp, " %-15s", sc->name); 3376 printed += fprintf(fp, " %8" PRIu64 " %9.3f %9.3f %9.3f", 3377 n, syscall_stats_entry->msecs, min, avg); 3378 printed += fprintf(fp, " %9.3f %9.2f%%\n", max, pct); 3379 } 3380 } 3381 3382 resort_rb__delete(syscall_stats); 3383 printed += fprintf(fp, "\n\n"); 3384 3385 return printed; 3386 } 3387 3388 static size_t trace__fprintf_thread(FILE *fp, struct thread *thread, struct trace *trace) 3389 { 3390 size_t printed = 0; 3391 struct thread_trace *ttrace = thread__priv(thread); 3392 double ratio; 3393 3394 if (ttrace == NULL) 3395 return 0; 3396 3397 ratio = (double)ttrace->nr_events / trace->nr_events * 100.0; 3398 3399 printed += fprintf(fp, " %s (%d), ", thread__comm_str(thread), thread->tid); 3400 printed += fprintf(fp, "%lu events, ", ttrace->nr_events); 3401 printed += fprintf(fp, "%.1f%%", ratio); 3402 if (ttrace->pfmaj) 3403 printed += fprintf(fp, ", %lu majfaults", ttrace->pfmaj); 3404 if (ttrace->pfmin) 3405 printed += fprintf(fp, ", %lu minfaults", ttrace->pfmin); 3406 if (trace->sched) 3407 printed += fprintf(fp, ", %.3f msec\n", ttrace->runtime_ms); 3408 else if (fputc('\n', fp) != EOF) 3409 ++printed; 3410 3411 printed += thread__dump_stats(ttrace, trace, fp); 3412 3413 return printed; 3414 } 3415 3416 static unsigned long thread__nr_events(struct thread_trace *ttrace) 3417 { 3418 return ttrace ? ttrace->nr_events : 0; 3419 } 3420 3421 DEFINE_RESORT_RB(threads, (thread__nr_events(a->thread->priv) < thread__nr_events(b->thread->priv)), 3422 struct thread *thread; 3423 ) 3424 { 3425 entry->thread = rb_entry(nd, struct thread, rb_node); 3426 } 3427 3428 static size_t trace__fprintf_thread_summary(struct trace *trace, FILE *fp) 3429 { 3430 size_t printed = trace__fprintf_threads_header(fp); 3431 struct rb_node *nd; 3432 int i; 3433 3434 for (i = 0; i < THREADS__TABLE_SIZE; i++) { 3435 DECLARE_RESORT_RB_MACHINE_THREADS(threads, trace->host, i); 3436 3437 if (threads == NULL) { 3438 fprintf(fp, "%s", "Error sorting output by nr_events!\n"); 3439 return 0; 3440 } 3441 3442 resort_rb__for_each_entry(nd, threads) 3443 printed += trace__fprintf_thread(fp, threads_entry->thread, trace); 3444 3445 resort_rb__delete(threads); 3446 } 3447 return printed; 3448 } 3449 3450 static int trace__set_duration(const struct option *opt, const char *str, 3451 int unset __maybe_unused) 3452 { 3453 struct trace *trace = opt->value; 3454 3455 trace->duration_filter = atof(str); 3456 return 0; 3457 } 3458 3459 static int trace__set_filter_pids_from_option(const struct option *opt, const char *str, 3460 int unset __maybe_unused) 3461 { 3462 int ret = -1; 3463 size_t i; 3464 struct trace *trace = opt->value; 3465 /* 3466 * FIXME: introduce a intarray class, plain parse csv and create a 3467 * { int nr, int entries[] } struct... 3468 */ 3469 struct intlist *list = intlist__new(str); 3470 3471 if (list == NULL) 3472 return -1; 3473 3474 i = trace->filter_pids.nr = intlist__nr_entries(list) + 1; 3475 trace->filter_pids.entries = calloc(i, sizeof(pid_t)); 3476 3477 if (trace->filter_pids.entries == NULL) 3478 goto out; 3479 3480 trace->filter_pids.entries[0] = getpid(); 3481 3482 for (i = 1; i < trace->filter_pids.nr; ++i) 3483 trace->filter_pids.entries[i] = intlist__entry(list, i - 1)->i; 3484 3485 intlist__delete(list); 3486 ret = 0; 3487 out: 3488 return ret; 3489 } 3490 3491 static int trace__open_output(struct trace *trace, const char *filename) 3492 { 3493 struct stat st; 3494 3495 if (!stat(filename, &st) && st.st_size) { 3496 char oldname[PATH_MAX]; 3497 3498 scnprintf(oldname, sizeof(oldname), "%s.old", filename); 3499 unlink(oldname); 3500 rename(filename, oldname); 3501 } 3502 3503 trace->output = fopen(filename, "w"); 3504 3505 return trace->output == NULL ? -errno : 0; 3506 } 3507 3508 static int parse_pagefaults(const struct option *opt, const char *str, 3509 int unset __maybe_unused) 3510 { 3511 int *trace_pgfaults = opt->value; 3512 3513 if (strcmp(str, "all") == 0) 3514 *trace_pgfaults |= TRACE_PFMAJ | TRACE_PFMIN; 3515 else if (strcmp(str, "maj") == 0) 3516 *trace_pgfaults |= TRACE_PFMAJ; 3517 else if (strcmp(str, "min") == 0) 3518 *trace_pgfaults |= TRACE_PFMIN; 3519 else 3520 return -1; 3521 3522 return 0; 3523 } 3524 3525 static void evlist__set_evsel_handler(struct perf_evlist *evlist, void *handler) 3526 { 3527 struct perf_evsel *evsel; 3528 3529 evlist__for_each_entry(evlist, evsel) 3530 evsel->handler = handler; 3531 } 3532 3533 static int evlist__set_syscall_tp_fields(struct perf_evlist *evlist) 3534 { 3535 struct perf_evsel *evsel; 3536 3537 evlist__for_each_entry(evlist, evsel) { 3538 if (evsel->priv || !evsel->tp_format) 3539 continue; 3540 3541 if (strcmp(evsel->tp_format->system, "syscalls")) 3542 continue; 3543 3544 if (perf_evsel__init_syscall_tp(evsel)) 3545 return -1; 3546 3547 if (!strncmp(evsel->tp_format->name, "sys_enter_", 10)) { 3548 struct syscall_tp *sc = evsel->priv; 3549 3550 if (__tp_field__init_ptr(&sc->args, sc->id.offset + sizeof(u64))) 3551 return -1; 3552 } else if (!strncmp(evsel->tp_format->name, "sys_exit_", 9)) { 3553 struct syscall_tp *sc = evsel->priv; 3554 3555 if (__tp_field__init_uint(&sc->ret, sizeof(u64), sc->id.offset + sizeof(u64), evsel->needs_swap)) 3556 return -1; 3557 } 3558 } 3559 3560 return 0; 3561 } 3562 3563 /* 3564 * XXX: Hackish, just splitting the combined -e+--event (syscalls 3565 * (raw_syscalls:{sys_{enter,exit}} + events (tracepoints, HW, SW, etc) to use 3566 * existing facilities unchanged (trace->ev_qualifier + parse_options()). 3567 * 3568 * It'd be better to introduce a parse_options() variant that would return a 3569 * list with the terms it didn't match to an event... 3570 */ 3571 static int trace__parse_events_option(const struct option *opt, const char *str, 3572 int unset __maybe_unused) 3573 { 3574 struct trace *trace = (struct trace *)opt->value; 3575 const char *s = str; 3576 char *sep = NULL, *lists[2] = { NULL, NULL, }; 3577 int len = strlen(str) + 1, err = -1, list, idx; 3578 char *strace_groups_dir = system_path(STRACE_GROUPS_DIR); 3579 char group_name[PATH_MAX]; 3580 struct syscall_fmt *fmt; 3581 3582 if (strace_groups_dir == NULL) 3583 return -1; 3584 3585 if (*s == '!') { 3586 ++s; 3587 trace->not_ev_qualifier = true; 3588 } 3589 3590 while (1) { 3591 if ((sep = strchr(s, ',')) != NULL) 3592 *sep = '\0'; 3593 3594 list = 0; 3595 if (syscalltbl__id(trace->sctbl, s) >= 0 || 3596 syscalltbl__strglobmatch_first(trace->sctbl, s, &idx) >= 0) { 3597 list = 1; 3598 goto do_concat; 3599 } 3600 3601 fmt = syscall_fmt__find_by_alias(s); 3602 if (fmt != NULL) { 3603 list = 1; 3604 s = fmt->name; 3605 } else { 3606 path__join(group_name, sizeof(group_name), strace_groups_dir, s); 3607 if (access(group_name, R_OK) == 0) 3608 list = 1; 3609 } 3610 do_concat: 3611 if (lists[list]) { 3612 sprintf(lists[list] + strlen(lists[list]), ",%s", s); 3613 } else { 3614 lists[list] = malloc(len); 3615 if (lists[list] == NULL) 3616 goto out; 3617 strcpy(lists[list], s); 3618 } 3619 3620 if (!sep) 3621 break; 3622 3623 *sep = ','; 3624 s = sep + 1; 3625 } 3626 3627 if (lists[1] != NULL) { 3628 struct strlist_config slist_config = { 3629 .dirname = strace_groups_dir, 3630 }; 3631 3632 trace->ev_qualifier = strlist__new(lists[1], &slist_config); 3633 if (trace->ev_qualifier == NULL) { 3634 fputs("Not enough memory to parse event qualifier", trace->output); 3635 goto out; 3636 } 3637 3638 if (trace__validate_ev_qualifier(trace)) 3639 goto out; 3640 trace->trace_syscalls = true; 3641 } 3642 3643 err = 0; 3644 3645 if (lists[0]) { 3646 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3647 "event selector. use 'perf list' to list available events", 3648 parse_events_option); 3649 err = parse_events_option(&o, lists[0], 0); 3650 } 3651 out: 3652 if (sep) 3653 *sep = ','; 3654 3655 return err; 3656 } 3657 3658 static int trace__parse_cgroups(const struct option *opt, const char *str, int unset) 3659 { 3660 struct trace *trace = opt->value; 3661 3662 if (!list_empty(&trace->evlist->entries)) 3663 return parse_cgroups(opt, str, unset); 3664 3665 trace->cgroup = evlist__findnew_cgroup(trace->evlist, str); 3666 3667 return 0; 3668 } 3669 3670 static struct bpf_map *bpf__find_map_by_name(const char *name) 3671 { 3672 struct bpf_object *obj, *tmp; 3673 3674 bpf_object__for_each_safe(obj, tmp) { 3675 struct bpf_map *map = bpf_object__find_map_by_name(obj, name); 3676 if (map) 3677 return map; 3678 3679 } 3680 3681 return NULL; 3682 } 3683 3684 static void trace__set_bpf_map_filtered_pids(struct trace *trace) 3685 { 3686 trace->filter_pids.map = bpf__find_map_by_name("pids_filtered"); 3687 } 3688 3689 static void trace__set_bpf_map_syscalls(struct trace *trace) 3690 { 3691 trace->syscalls.map = bpf__find_map_by_name("syscalls"); 3692 } 3693 3694 static int trace__config(const char *var, const char *value, void *arg) 3695 { 3696 struct trace *trace = arg; 3697 int err = 0; 3698 3699 if (!strcmp(var, "trace.add_events")) { 3700 struct option o = OPT_CALLBACK('e', "event", &trace->evlist, "event", 3701 "event selector. use 'perf list' to list available events", 3702 parse_events_option); 3703 /* 3704 * We can't propagate parse_event_option() return, as it is 1 3705 * for failure while perf_config() expects -1. 3706 */ 3707 if (parse_events_option(&o, value, 0)) 3708 err = -1; 3709 } else if (!strcmp(var, "trace.show_timestamp")) { 3710 trace->show_tstamp = perf_config_bool(var, value); 3711 } else if (!strcmp(var, "trace.show_duration")) { 3712 trace->show_duration = perf_config_bool(var, value); 3713 } else if (!strcmp(var, "trace.show_arg_names")) { 3714 trace->show_arg_names = perf_config_bool(var, value); 3715 if (!trace->show_arg_names) 3716 trace->show_zeros = true; 3717 } else if (!strcmp(var, "trace.show_zeros")) { 3718 bool new_show_zeros = perf_config_bool(var, value); 3719 if (!trace->show_arg_names && !new_show_zeros) { 3720 pr_warning("trace.show_zeros has to be set when trace.show_arg_names=no\n"); 3721 goto out; 3722 } 3723 trace->show_zeros = new_show_zeros; 3724 } else if (!strcmp(var, "trace.show_prefix")) { 3725 trace->show_string_prefix = perf_config_bool(var, value); 3726 } else if (!strcmp(var, "trace.no_inherit")) { 3727 trace->opts.no_inherit = perf_config_bool(var, value); 3728 } else if (!strcmp(var, "trace.args_alignment")) { 3729 int args_alignment = 0; 3730 if (perf_config_int(&args_alignment, var, value) == 0) 3731 trace->args_alignment = args_alignment; 3732 } 3733 out: 3734 return err; 3735 } 3736 3737 int cmd_trace(int argc, const char **argv) 3738 { 3739 const char *trace_usage[] = { 3740 "perf trace [<options>] [<command>]", 3741 "perf trace [<options>] -- <command> [<options>]", 3742 "perf trace record [<options>] [<command>]", 3743 "perf trace record [<options>] -- <command> [<options>]", 3744 NULL 3745 }; 3746 struct trace trace = { 3747 .syscalls = { 3748 . max = -1, 3749 }, 3750 .opts = { 3751 .target = { 3752 .uid = UINT_MAX, 3753 .uses_mmap = true, 3754 }, 3755 .user_freq = UINT_MAX, 3756 .user_interval = ULLONG_MAX, 3757 .no_buffering = true, 3758 .mmap_pages = UINT_MAX, 3759 }, 3760 .output = stderr, 3761 .show_comm = true, 3762 .show_tstamp = true, 3763 .show_duration = true, 3764 .show_arg_names = true, 3765 .args_alignment = 70, 3766 .trace_syscalls = false, 3767 .kernel_syscallchains = false, 3768 .max_stack = UINT_MAX, 3769 .max_events = ULONG_MAX, 3770 }; 3771 const char *map_dump_str = NULL; 3772 const char *output_name = NULL; 3773 const struct option trace_options[] = { 3774 OPT_CALLBACK('e', "event", &trace, "event", 3775 "event/syscall selector. use 'perf list' to list available events", 3776 trace__parse_events_option), 3777 OPT_BOOLEAN(0, "comm", &trace.show_comm, 3778 "show the thread COMM next to its id"), 3779 OPT_BOOLEAN(0, "tool_stats", &trace.show_tool_stats, "show tool stats"), 3780 OPT_CALLBACK(0, "expr", &trace, "expr", "list of syscalls/events to trace", 3781 trace__parse_events_option), 3782 OPT_STRING('o', "output", &output_name, "file", "output file name"), 3783 OPT_STRING('i', "input", &input_name, "file", "Analyze events in file"), 3784 OPT_STRING('p', "pid", &trace.opts.target.pid, "pid", 3785 "trace events on existing process id"), 3786 OPT_STRING('t', "tid", &trace.opts.target.tid, "tid", 3787 "trace events on existing thread id"), 3788 OPT_CALLBACK(0, "filter-pids", &trace, "CSV list of pids", 3789 "pids to filter (by the kernel)", trace__set_filter_pids_from_option), 3790 OPT_BOOLEAN('a', "all-cpus", &trace.opts.target.system_wide, 3791 "system-wide collection from all CPUs"), 3792 OPT_STRING('C', "cpu", &trace.opts.target.cpu_list, "cpu", 3793 "list of cpus to monitor"), 3794 OPT_BOOLEAN(0, "no-inherit", &trace.opts.no_inherit, 3795 "child tasks do not inherit counters"), 3796 OPT_CALLBACK('m', "mmap-pages", &trace.opts.mmap_pages, "pages", 3797 "number of mmap data pages", 3798 perf_evlist__parse_mmap_pages), 3799 OPT_STRING('u', "uid", &trace.opts.target.uid_str, "user", 3800 "user to profile"), 3801 OPT_CALLBACK(0, "duration", &trace, "float", 3802 "show only events with duration > N.M ms", 3803 trace__set_duration), 3804 #ifdef HAVE_LIBBPF_SUPPORT 3805 OPT_STRING(0, "map-dump", &map_dump_str, "BPF map", "BPF map to periodically dump"), 3806 #endif 3807 OPT_BOOLEAN(0, "sched", &trace.sched, "show blocking scheduler events"), 3808 OPT_INCR('v', "verbose", &verbose, "be more verbose"), 3809 OPT_BOOLEAN('T', "time", &trace.full_time, 3810 "Show full timestamp, not time relative to first start"), 3811 OPT_BOOLEAN(0, "failure", &trace.failure_only, 3812 "Show only syscalls that failed"), 3813 OPT_BOOLEAN('s', "summary", &trace.summary_only, 3814 "Show only syscall summary with statistics"), 3815 OPT_BOOLEAN('S', "with-summary", &trace.summary, 3816 "Show all syscalls and summary with statistics"), 3817 OPT_CALLBACK_DEFAULT('F', "pf", &trace.trace_pgfaults, "all|maj|min", 3818 "Trace pagefaults", parse_pagefaults, "maj"), 3819 OPT_BOOLEAN(0, "syscalls", &trace.trace_syscalls, "Trace syscalls"), 3820 OPT_BOOLEAN('f', "force", &trace.force, "don't complain, do it"), 3821 OPT_CALLBACK(0, "call-graph", &trace.opts, 3822 "record_mode[,record_size]", record_callchain_help, 3823 &record_parse_callchain_opt), 3824 OPT_BOOLEAN(0, "kernel-syscall-graph", &trace.kernel_syscallchains, 3825 "Show the kernel callchains on the syscall exit path"), 3826 OPT_ULONG(0, "max-events", &trace.max_events, 3827 "Set the maximum number of events to print, exit after that is reached. "), 3828 OPT_UINTEGER(0, "min-stack", &trace.min_stack, 3829 "Set the minimum stack depth when parsing the callchain, " 3830 "anything below the specified depth will be ignored."), 3831 OPT_UINTEGER(0, "max-stack", &trace.max_stack, 3832 "Set the maximum stack depth when parsing the callchain, " 3833 "anything beyond the specified depth will be ignored. " 3834 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 3835 OPT_BOOLEAN(0, "sort-events", &trace.sort_events, 3836 "Sort batch of events before processing, use if getting out of order events"), 3837 OPT_BOOLEAN(0, "print-sample", &trace.print_sample, 3838 "print the PERF_RECORD_SAMPLE PERF_SAMPLE_ info, for debugging"), 3839 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 3840 "per thread proc mmap processing timeout in ms"), 3841 OPT_CALLBACK('G', "cgroup", &trace, "name", "monitor event in cgroup name only", 3842 trace__parse_cgroups), 3843 OPT_UINTEGER('D', "delay", &trace.opts.initial_delay, 3844 "ms to wait before starting measurement after program " 3845 "start"), 3846 OPT_END() 3847 }; 3848 bool __maybe_unused max_stack_user_set = true; 3849 bool mmap_pages_user_set = true; 3850 struct perf_evsel *evsel; 3851 const char * const trace_subcommands[] = { "record", NULL }; 3852 int err = -1; 3853 char bf[BUFSIZ]; 3854 3855 signal(SIGSEGV, sighandler_dump_stack); 3856 signal(SIGFPE, sighandler_dump_stack); 3857 3858 trace.evlist = perf_evlist__new(); 3859 trace.sctbl = syscalltbl__new(); 3860 3861 if (trace.evlist == NULL || trace.sctbl == NULL) { 3862 pr_err("Not enough memory to run!\n"); 3863 err = -ENOMEM; 3864 goto out; 3865 } 3866 3867 err = perf_config(trace__config, &trace); 3868 if (err) 3869 goto out; 3870 3871 argc = parse_options_subcommand(argc, argv, trace_options, trace_subcommands, 3872 trace_usage, PARSE_OPT_STOP_AT_NON_OPTION); 3873 3874 if ((nr_cgroups || trace.cgroup) && !trace.opts.target.system_wide) { 3875 usage_with_options_msg(trace_usage, trace_options, 3876 "cgroup monitoring only available in system-wide mode"); 3877 } 3878 3879 evsel = bpf__setup_output_event(trace.evlist, "__augmented_syscalls__"); 3880 if (IS_ERR(evsel)) { 3881 bpf__strerror_setup_output_event(trace.evlist, PTR_ERR(evsel), bf, sizeof(bf)); 3882 pr_err("ERROR: Setup trace syscalls enter failed: %s\n", bf); 3883 goto out; 3884 } 3885 3886 if (evsel) { 3887 trace.syscalls.events.augmented = evsel; 3888 trace__set_bpf_map_filtered_pids(&trace); 3889 trace__set_bpf_map_syscalls(&trace); 3890 } 3891 3892 err = bpf__setup_stdout(trace.evlist); 3893 if (err) { 3894 bpf__strerror_setup_stdout(trace.evlist, err, bf, sizeof(bf)); 3895 pr_err("ERROR: Setup BPF stdout failed: %s\n", bf); 3896 goto out; 3897 } 3898 3899 err = -1; 3900 3901 if (map_dump_str) { 3902 trace.dump.map = bpf__find_map_by_name(map_dump_str); 3903 if (trace.dump.map == NULL) { 3904 pr_err("ERROR: BPF map \"%s\" not found\n", map_dump_str); 3905 goto out; 3906 } 3907 } 3908 3909 if (trace.trace_pgfaults) { 3910 trace.opts.sample_address = true; 3911 trace.opts.sample_time = true; 3912 } 3913 3914 if (trace.opts.mmap_pages == UINT_MAX) 3915 mmap_pages_user_set = false; 3916 3917 if (trace.max_stack == UINT_MAX) { 3918 trace.max_stack = input_name ? PERF_MAX_STACK_DEPTH : sysctl__max_stack(); 3919 max_stack_user_set = false; 3920 } 3921 3922 #ifdef HAVE_DWARF_UNWIND_SUPPORT 3923 if ((trace.min_stack || max_stack_user_set) && !callchain_param.enabled) { 3924 record_opts__parse_callchain(&trace.opts, &callchain_param, "dwarf", false); 3925 } 3926 #endif 3927 3928 if (callchain_param.enabled) { 3929 if (!mmap_pages_user_set && geteuid() == 0) 3930 trace.opts.mmap_pages = perf_event_mlock_kb_in_pages() * 4; 3931 3932 symbol_conf.use_callchain = true; 3933 } 3934 3935 if (trace.evlist->nr_entries > 0) { 3936 evlist__set_evsel_handler(trace.evlist, trace__event_handler); 3937 if (evlist__set_syscall_tp_fields(trace.evlist)) { 3938 perror("failed to set syscalls:* tracepoint fields"); 3939 goto out; 3940 } 3941 } 3942 3943 if (trace.sort_events) { 3944 ordered_events__init(&trace.oe.data, ordered_events__deliver_event, &trace); 3945 ordered_events__set_copy_on_queue(&trace.oe.data, true); 3946 } 3947 3948 /* 3949 * If we are augmenting syscalls, then combine what we put in the 3950 * __augmented_syscalls__ BPF map with what is in the 3951 * syscalls:sys_exit_FOO tracepoints, i.e. just like we do without BPF, 3952 * combining raw_syscalls:sys_enter with raw_syscalls:sys_exit. 3953 * 3954 * We'll switch to look at two BPF maps, one for sys_enter and the 3955 * other for sys_exit when we start augmenting the sys_exit paths with 3956 * buffers that are being copied from kernel to userspace, think 'read' 3957 * syscall. 3958 */ 3959 if (trace.syscalls.events.augmented) { 3960 evlist__for_each_entry(trace.evlist, evsel) { 3961 bool raw_syscalls_sys_exit = strcmp(perf_evsel__name(evsel), "raw_syscalls:sys_exit") == 0; 3962 3963 if (raw_syscalls_sys_exit) { 3964 trace.raw_augmented_syscalls = true; 3965 goto init_augmented_syscall_tp; 3966 } 3967 3968 if (trace.syscalls.events.augmented->priv == NULL && 3969 strstr(perf_evsel__name(evsel), "syscalls:sys_enter")) { 3970 struct perf_evsel *augmented = trace.syscalls.events.augmented; 3971 if (perf_evsel__init_augmented_syscall_tp(augmented, evsel) || 3972 perf_evsel__init_augmented_syscall_tp_args(augmented)) 3973 goto out; 3974 augmented->handler = trace__sys_enter; 3975 } 3976 3977 if (strstarts(perf_evsel__name(evsel), "syscalls:sys_exit_")) { 3978 struct syscall_tp *sc; 3979 init_augmented_syscall_tp: 3980 if (perf_evsel__init_augmented_syscall_tp(evsel, evsel)) 3981 goto out; 3982 sc = evsel->priv; 3983 /* 3984 * For now with BPF raw_augmented we hook into 3985 * raw_syscalls:sys_enter and there we get all 3986 * 6 syscall args plus the tracepoint common 3987 * fields and the syscall_nr (another long). 3988 * So we check if that is the case and if so 3989 * don't look after the sc->args_size but 3990 * always after the full raw_syscalls:sys_enter 3991 * payload, which is fixed. 3992 * 3993 * We'll revisit this later to pass 3994 * s->args_size to the BPF augmenter (now 3995 * tools/perf/examples/bpf/augmented_raw_syscalls.c, 3996 * so that it copies only what we need for each 3997 * syscall, like what happens when we use 3998 * syscalls:sys_enter_NAME, so that we reduce 3999 * the kernel/userspace traffic to just what is 4000 * needed for each syscall. 4001 */ 4002 if (trace.raw_augmented_syscalls) 4003 trace.raw_augmented_syscalls_args_size = (6 + 1) * sizeof(long) + sc->id.offset; 4004 perf_evsel__init_augmented_syscall_tp_ret(evsel); 4005 evsel->handler = trace__sys_exit; 4006 } 4007 } 4008 } 4009 4010 if ((argc >= 1) && (strcmp(argv[0], "record") == 0)) 4011 return trace__record(&trace, argc-1, &argv[1]); 4012 4013 /* summary_only implies summary option, but don't overwrite summary if set */ 4014 if (trace.summary_only) 4015 trace.summary = trace.summary_only; 4016 4017 if (!trace.trace_syscalls && !trace.trace_pgfaults && 4018 trace.evlist->nr_entries == 0 /* Was --events used? */) { 4019 trace.trace_syscalls = true; 4020 } 4021 4022 if (output_name != NULL) { 4023 err = trace__open_output(&trace, output_name); 4024 if (err < 0) { 4025 perror("failed to create output file"); 4026 goto out; 4027 } 4028 } 4029 4030 err = target__validate(&trace.opts.target); 4031 if (err) { 4032 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4033 fprintf(trace.output, "%s", bf); 4034 goto out_close; 4035 } 4036 4037 err = target__parse_uid(&trace.opts.target); 4038 if (err) { 4039 target__strerror(&trace.opts.target, err, bf, sizeof(bf)); 4040 fprintf(trace.output, "%s", bf); 4041 goto out_close; 4042 } 4043 4044 if (!argc && target__none(&trace.opts.target)) 4045 trace.opts.target.system_wide = true; 4046 4047 if (input_name) 4048 err = trace__replay(&trace); 4049 else 4050 err = trace__run(&trace, argc, argv); 4051 4052 out_close: 4053 if (output_name != NULL) 4054 fclose(trace.output); 4055 out: 4056 return err; 4057 } 4058