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