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