1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #include <sys/mdb_modapi.h> 28 #include <mdb/mdb_whatis.h> 29 #include <procfs.h> 30 #include <ucontext.h> 31 #include <siginfo.h> 32 #include <signal.h> 33 #include <setjmp.h> 34 #include <string.h> 35 #include <thr_uberdata.h> 36 37 static const char * 38 stack_flags(const stack_t *sp) 39 { 40 static char buf[32]; 41 42 if (sp->ss_flags == 0) 43 (void) strcpy(buf, " 0"); 44 else if (sp->ss_flags & ~(SS_ONSTACK | SS_DISABLE)) 45 (void) mdb_snprintf(buf, sizeof (buf), " 0x%x", sp->ss_flags); 46 else { 47 buf[0] = '\0'; 48 if (sp->ss_flags & SS_ONSTACK) 49 (void) strcat(buf, "|ONSTACK"); 50 if (sp->ss_flags & SS_DISABLE) 51 (void) strcat(buf, "|DISABLE"); 52 } 53 54 return (buf + 1); 55 } 56 57 /*ARGSUSED*/ 58 static int 59 d_jmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 60 { 61 jmp_buf jb; 62 const ulong_t *b = (const ulong_t *)jb; 63 64 if (argc != 0) 65 return (DCMD_USAGE); 66 67 if (mdb_vread(&jb, sizeof (jb), addr) != sizeof (jb)) { 68 mdb_warn("failed to read jmp_buf at %p", addr); 69 return (DCMD_ERR); 70 } 71 72 #if defined(__sparc) 73 mdb_printf(" %%sp = 0x%lx\n", b[1]); 74 mdb_printf(" %%pc = 0x%lx %lA\n", b[2], b[2]); 75 mdb_printf(" %%fp = 0x%lx\n", b[3]); 76 mdb_printf(" %%i7 = 0x%lx %lA\n", b[4], b[4]); 77 #elif defined(__amd64) 78 mdb_printf(" %%rbx = 0x%lx\n", b[0]); 79 mdb_printf(" %%r12 = 0x%lx\n", b[1]); 80 mdb_printf(" %%r13 = 0x%lx\n", b[2]); 81 mdb_printf(" %%r14 = 0x%lx\n", b[3]); 82 mdb_printf(" %%r15 = 0x%lx\n", b[4]); 83 mdb_printf(" %%rbp = 0x%lx\n", b[5]); 84 mdb_printf(" %%rsp = 0x%lx\n", b[6]); 85 mdb_printf(" %%rip = 0x%lx %lA\n", b[7], b[7]); 86 #elif defined(__i386) 87 mdb_printf(" %%ebx = 0x%lx\n", b[0]); 88 mdb_printf(" %%esi = 0x%lx\n", b[1]); 89 mdb_printf(" %%edi = 0x%lx\n", b[2]); 90 mdb_printf(" %%ebp = 0x%lx\n", b[3]); 91 mdb_printf(" %%esp = 0x%lx\n", b[4]); 92 mdb_printf(" %%eip = 0x%lx %lA\n", b[5], b[5]); 93 #endif 94 return (DCMD_OK); 95 } 96 97 /*ARGSUSED*/ 98 static int 99 d_ucontext(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 100 { 101 ucontext_t uc; 102 103 if (argc != 0) 104 return (DCMD_USAGE); 105 106 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) { 107 mdb_warn("failed to read ucontext at %p", addr); 108 return (DCMD_ERR); 109 } 110 111 mdb_printf(" flags = 0x%lx\n", uc.uc_flags); 112 mdb_printf(" link = 0x%p\n", uc.uc_link); 113 mdb_printf(" sigmask = 0x%08x 0x%08x 0x%08x 0x%08x\n", 114 uc.uc_sigmask.__sigbits[0], uc.uc_sigmask.__sigbits[1], 115 uc.uc_sigmask.__sigbits[2], uc.uc_sigmask.__sigbits[3]); 116 mdb_printf(" stack = sp 0x%p size 0x%lx flags %s\n", 117 uc.uc_stack.ss_sp, uc.uc_stack.ss_size, stack_flags(&uc.uc_stack)); 118 mdb_printf(" mcontext = 0x%p\n", 119 addr + OFFSETOF(ucontext_t, uc_mcontext)); 120 121 return (DCMD_OK); 122 } 123 124 /*ARGSUSED*/ 125 static int 126 d_sigjmp_buf(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 127 { 128 #if defined(__sparc) 129 struct { 130 int sjs_flags; 131 greg_t sjs_sp; 132 greg_t sjs_pc; 133 greg_t sjs_fp; 134 greg_t sjs_i7; 135 ucontext_t *sjs_uclink; 136 ulong_t sjs_pad[_JBLEN - 6]; 137 sigset_t sjs_sigmask; 138 #if defined(_LP64) 139 ulong_t sjs_pad1[2]; 140 #endif 141 stack_t sjs_stack; 142 } s; 143 144 if (argc != 0) 145 return (DCMD_USAGE); 146 147 if (mdb_vread(&s, sizeof (s), addr) != sizeof (s)) { 148 mdb_warn("failed to read sigjmp_buf at %p", addr); 149 return (DCMD_ERR); 150 } 151 152 mdb_printf(" flags = 0x%x\n", s.sjs_flags); 153 mdb_printf(" %%sp = 0x%lx %lA\n", s.sjs_sp, s.sjs_sp); 154 mdb_printf(" %%pc = 0x%lx %lA\n", s.sjs_pc, s.sjs_pc); 155 mdb_printf(" %%fp = 0x%lx %lA\n", s.sjs_fp, s.sjs_fp); 156 mdb_printf(" %%i7 = 0x%lx %lA\n", s.sjs_i7, s.sjs_i7); 157 mdb_printf(" uclink = %p\n", s.sjs_uclink); 158 mdb_printf(" sigset = 0x%08x 0x%08x 0x%08x 0x%08x\n", 159 s.sjs_sigmask.__sigbits[0], s.sjs_sigmask.__sigbits[1], 160 s.sjs_sigmask.__sigbits[2], s.sjs_sigmask.__sigbits[3]); 161 mdb_printf(" stack = sp 0x%p size 0x%lx flags %s\n", 162 s.sjs_stack.ss_sp, s.sjs_stack.ss_size, stack_flags(&s.sjs_stack)); 163 164 return (DCMD_OK); 165 166 #elif defined(__i386) || defined(__amd64) 167 return (d_ucontext(addr, flags, argc, argv)); 168 #endif 169 } 170 171 /*ARGSUSED*/ 172 static int 173 d_siginfo(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 174 { 175 static const char *const msname[] = { 176 "USER", "SYSTEM", "TRAP", "TFAULT", "DFAULT", "KFAULT", 177 "USER_LOCK", "SLEEP", "WAIT_CPU", "STOPPED" 178 }; 179 180 char signame[SIG2STR_MAX]; 181 siginfo_t si; 182 int i; 183 184 if (argc != 0) 185 return (DCMD_USAGE); 186 187 if (mdb_vread(&si, sizeof (si), addr) != sizeof (si)) { 188 mdb_warn("failed to read siginfo at %p", addr); 189 return (DCMD_ERR); 190 } 191 192 if (sig2str(si.si_signo, signame) == -1) 193 (void) strcpy(signame, "unknown"); 194 195 mdb_printf(" signal %5d (%s)\n", si.si_signo, signame); 196 mdb_printf(" code %5d (", si.si_code); 197 198 switch (si.si_code) { 199 case SI_NOINFO: 200 mdb_printf("no info"); 201 break; 202 case SI_DTRACE: 203 mdb_printf("from DTrace raise() action"); 204 break; 205 case SI_RCTL: 206 mdb_printf("from rctl action"); 207 break; 208 case SI_USER: 209 mdb_printf("user generated via kill"); 210 break; 211 case SI_LWP: 212 mdb_printf("user generated via lwp_kill"); 213 break; 214 case SI_QUEUE: 215 mdb_printf("user generated via sigqueue"); 216 break; 217 case SI_TIMER: 218 mdb_printf("from timer expiration"); 219 break; 220 case SI_ASYNCIO: 221 mdb_printf("from async i/o completion"); 222 break; 223 case SI_MESGQ: 224 mdb_printf("from message arrival"); 225 break; 226 default: 227 if (SI_FROMUSER(&si)) 228 mdb_printf("from user process"); 229 else 230 mdb_printf("from kernel"); 231 } 232 233 mdb_printf(")\n errno %5d (%s)\n", 234 si.si_errno, strerror(si.si_errno)); 235 236 if (si.si_code == SI_USER || si.si_code == SI_QUEUE) { 237 mdb_printf(" signal sent from PID %d (uid %d)\n", 238 si.si_pid, si.si_uid); 239 } 240 241 if (si.si_code == SI_QUEUE) { 242 mdb_printf(" signal value = 0t%d / %p\n", 243 si.si_value.sival_int, si.si_value.sival_ptr); 244 } 245 246 switch (si.si_signo) { 247 case SIGCLD: 248 mdb_printf(" signal sent from child PID %d (uid %d)\n", 249 si.si_pid, si.si_uid); 250 mdb_printf(" usr time = 0t%ld ticks, sys time = 0t%ld ticks\n", 251 si.si_utime, si.si_stime); 252 mdb_printf(" wait status = 0x%x\n", si.si_status); 253 break; 254 255 case SIGSEGV: 256 case SIGBUS: 257 case SIGILL: 258 case SIGTRAP: 259 case SIGFPE: 260 mdb_printf(" fault address = 0x%p\n trapno = %d\n", 261 si.si_addr, si.si_trapno); 262 mdb_printf(" instruction address = 0x%p %lA\n", 263 si.si_pc, si.si_pc); 264 break; 265 266 case SIGPOLL: 267 case SIGXFSZ: 268 mdb_printf(" fd = %d band = 0x%lx\n", 269 si.si_fd, si.si_band); 270 break; 271 272 case SIGPROF: 273 mdb_printf(" last fault address = 0x%p fault type = %d\n", 274 si.si_faddr, si.si_fault); 275 mdb_printf(" timestamp = 0t%ld sec 0t%ld nsec\n", 276 si.si_tstamp.tv_sec, si.si_tstamp.tv_nsec); 277 278 if (si.__data.__prof.__syscall != 0) { 279 mdb_printf(" system call %d (", si.si_syscall); 280 if (si.si_nsysarg > 0) { 281 mdb_printf("%lx", si.si_sysarg[0]); 282 for (i = 1; i < si.si_nsysarg; i++) 283 mdb_printf(", %lx", si.si_sysarg[i]); 284 } 285 mdb_printf(" )\n"); 286 } 287 288 for (i = 0; i < sizeof (msname) / sizeof (msname[0]); i++) { 289 mdb_printf(" mstate[\"%s\"] = %d\n", 290 msname[i], si.si_mstate[i]); 291 } 292 break; 293 } 294 295 return (DCMD_OK); 296 } 297 298 static int 299 uc_walk_step(mdb_walk_state_t *wsp) 300 { 301 uintptr_t addr = wsp->walk_addr; 302 ucontext_t uc; 303 304 if (addr == NULL) 305 return (WALK_DONE); 306 307 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) { 308 mdb_warn("failed to read ucontext at %p", addr); 309 return (WALK_ERR); 310 } 311 312 wsp->walk_addr = (uintptr_t)uc.uc_link; 313 return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata)); 314 } 315 316 static int 317 oldc_walk_init(mdb_walk_state_t *wsp) 318 { 319 ssize_t nbytes = mdb_get_xdata("lwpstatus", NULL, 0); 320 321 if (nbytes <= 0) { 322 mdb_warn("lwpstatus information not available"); 323 return (WALK_ERR); 324 } 325 326 if (wsp->walk_addr != NULL) { 327 mdb_warn("walker only supports global walk\n"); 328 return (WALK_ERR); 329 } 330 331 wsp->walk_addr = nbytes; /* Use walk_addr to track size */ 332 wsp->walk_data = mdb_alloc(nbytes, UM_SLEEP); 333 334 if (mdb_get_xdata("lwpstatus", wsp->walk_data, nbytes) != nbytes) { 335 mdb_warn("failed to read lwpstatus information"); 336 mdb_free(wsp->walk_data, nbytes); 337 return (WALK_ERR); 338 } 339 340 wsp->walk_arg = wsp->walk_data; /* Use walk_arg to track pointer */ 341 return (WALK_NEXT); 342 } 343 344 static int 345 oldc_walk_step(mdb_walk_state_t *wsp) 346 { 347 const lwpstatus_t *lsp, *end; 348 349 end = (const lwpstatus_t *)((uintptr_t)wsp->walk_data + wsp->walk_addr); 350 lsp = wsp->walk_arg; 351 352 wsp->walk_arg = (void *)(lsp + 1); 353 354 if (lsp < end) { 355 uintptr_t addr = lsp->pr_oldcontext; 356 ucontext_t uc; 357 358 if (addr == NULL) 359 return (WALK_NEXT); 360 361 if (mdb_vread(&uc, sizeof (uc), addr) != sizeof (uc)) { 362 mdb_warn("failed to read ucontext at %p", addr); 363 return (WALK_NEXT); 364 } 365 366 return (wsp->walk_callback(addr, &uc, wsp->walk_cbdata)); 367 } 368 369 return (WALK_DONE); 370 } 371 372 static void 373 oldc_walk_fini(mdb_walk_state_t *wsp) 374 { 375 mdb_free(wsp->walk_data, wsp->walk_addr); /* walk_addr has size */ 376 } 377 378 /* 379 * ==================== threads ========================== 380 * These are the interfaces that used to require libthread. 381 * Now, libthread has been folded into libc. 382 * ======================================================= 383 */ 384 385 /* 386 * prt_addr() is called up to three times to generate arguments for 387 * one call to mdb_printf(). We must return at least three different 388 * pointers to static storage for consecutive calls to prt_addr(). 389 */ 390 static const char * 391 prt_addr(void *addr, int pad) 392 { 393 static char buffer[4][24]; 394 static int ix = 0; 395 char *buf; 396 397 if (ix == 4) /* use buffers in sequence: 0, 1, 2, 3 */ 398 ix = 0; 399 buf = buffer[ix++]; 400 if (addr == NULL) 401 return (pad? "<NULL> " : "<NULL>"); 402 else { 403 #ifdef _LP64 404 (void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%016lx", addr); 405 if (pad) 406 (void) strcpy(buf + 18, " "); 407 #else 408 (void) mdb_snprintf(buf, sizeof (buffer[0]), "0x%08lx", addr); 409 if (pad) 410 (void) strcpy(buf + 10, " "); 411 #endif /* _LP64 */ 412 return (buf); 413 } 414 } 415 416 #define HD(str) mdb_printf(" " str "\n") 417 #define OFFSTR "+0x%-7lx " 418 #define OFFSET(member) ((size_t)OFFSETOF(ulwp_t, member)) 419 420 /*ARGSUSED*/ 421 static int 422 d_ulwp(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 423 { 424 ulwp_t ulwp; 425 426 if (argc != 0 || !(flags & DCMD_ADDRSPEC)) 427 return (DCMD_USAGE); 428 429 if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) && 430 (bzero(&ulwp, sizeof (ulwp)), 431 mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) { 432 mdb_warn("failed to read ulwp at 0x%p", addr); 433 return (DCMD_ERR); 434 } 435 436 mdb_printf("%#a\n", addr); 437 438 HD("self uberdata"); 439 mdb_printf(OFFSTR "%s %s\n", 440 OFFSET(ul_self), 441 prt_addr(ulwp.ul_self, 1), 442 prt_addr(ulwp.ul_uberdata, 0)); 443 444 HD("tlsent ntlsent"); 445 mdb_printf(OFFSTR "%s %ld\n", 446 OFFSET(ul_tlsent), 447 prt_addr(ulwp.ul_tlsent, 1), 448 ulwp.ul_ntlsent); 449 450 HD("forw back next"); 451 mdb_printf(OFFSTR "%s %s %s\n", 452 OFFSET(ul_forw), 453 prt_addr(ulwp.ul_forw, 1), 454 prt_addr(ulwp.ul_back, 1), 455 prt_addr(ulwp.ul_next, 0)); 456 457 HD("hash rval stk"); 458 mdb_printf(OFFSTR "%s %s %s\n", 459 OFFSET(ul_hash), 460 prt_addr(ulwp.ul_hash, 1), 461 prt_addr(ulwp.ul_rval, 1), 462 prt_addr(ulwp.ul_stk, 0)); 463 464 HD("mapsiz guardsize stktop stksiz"); 465 mdb_printf(OFFSTR "%-10ld %-10ld %s %ld\n", 466 OFFSET(ul_mapsiz), 467 ulwp.ul_mapsiz, 468 ulwp.ul_guardsize, 469 prt_addr((void *)ulwp.ul_stktop, 1), 470 ulwp.ul_stksiz); 471 472 HD("ustack.ss_sp ustack.ss_size ustack.ss_flags"); 473 mdb_printf(OFFSTR "%s %-21ld %s\n", 474 OFFSET(ul_ustack.ss_sp), 475 prt_addr(ulwp.ul_ustack.ss_sp, 1), 476 ulwp.ul_ustack.ss_size, 477 stack_flags(&ulwp.ul_ustack)); 478 479 HD("ix lwpid pri epri policy cid"); 480 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 481 OFFSET(ul_ix), 482 ulwp.ul_ix, 483 ulwp.ul_lwpid, 484 ulwp.ul_pri, 485 ulwp.ul_epri, 486 ulwp.ul_policy, 487 ulwp.ul_cid); 488 489 HD("cursig pleasestop stop signalled dead unwind"); 490 mdb_printf(OFFSTR "%-10d ", 491 OFFSET(ul_cursig), 492 ulwp.ul_cursig); 493 mdb_printf(ulwp.ul_pleasestop? "0x%-8x " : "%-10d ", 494 ulwp.ul_pleasestop); 495 mdb_printf(ulwp.ul_stop? "0x%-8x " : "%-10d ", 496 ulwp.ul_stop); 497 mdb_printf("%-10d %-10d %d\n", 498 ulwp.ul_signalled, 499 ulwp.ul_dead, 500 ulwp.ul_unwind); 501 502 HD("detached writer stopping can'prolog preempt savpreempt"); 503 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 504 OFFSET(ul_detached), 505 ulwp.ul_detached, 506 ulwp.ul_writer, 507 ulwp.ul_stopping, 508 ulwp.ul_cancel_prologue, 509 ulwp.ul_preempt, 510 ulwp.ul_savpreempt); 511 512 HD("sigsuspend main fork primarymap m'spinners d'noreserv"); 513 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 514 OFFSET(ul_sigsuspend), 515 ulwp.ul_sigsuspend, 516 ulwp.ul_main, 517 ulwp.ul_fork, 518 ulwp.ul_primarymap, 519 ulwp.ul_max_spinners, 520 ulwp.ul_door_noreserve); 521 522 HD("queue_fifo c'w'defer e'detect' async_safe rt rtqueued"); 523 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 524 OFFSET(ul_queue_fifo), 525 ulwp.ul_queue_fifo, 526 ulwp.ul_cond_wait_defer, 527 ulwp.ul_error_detection, 528 ulwp.ul_async_safe, 529 ulwp.ul_rt, 530 ulwp.ul_rtqueued); 531 532 HD("misaligned adapt'spin queue_spin critical sigdefer vfork"); 533 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 534 OFFSET(ul_misaligned), 535 ulwp.ul_misaligned, 536 ulwp.ul_adaptive_spin, 537 ulwp.ul_queue_spin, 538 ulwp.ul_critical, 539 ulwp.ul_sigdefer, 540 ulwp.ul_vfork); 541 542 HD("cancelable c'pending c'disabled c'async save_async mutator"); 543 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 544 OFFSET(ul_cancelable), 545 ulwp.ul_cancelable, 546 ulwp.ul_cancel_pending, 547 ulwp.ul_cancel_disabled, 548 ulwp.ul_cancel_async, 549 ulwp.ul_save_async, 550 ulwp.ul_mutator); 551 552 HD("created replace nocancel errno errnop"); 553 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n", 554 OFFSET(ul_created), 555 ulwp.ul_created, 556 ulwp.ul_replace, 557 ulwp.ul_nocancel, 558 ulwp.ul_errno, 559 prt_addr(ulwp.ul_errnop, 0)); 560 561 HD("clnup_hdr schedctl_called schedctl"); 562 mdb_printf(OFFSTR "%s %s %s\n", 563 OFFSET(ul_clnup_hdr), 564 prt_addr(ulwp.ul_clnup_hdr, 1), 565 prt_addr(ulwp.ul_schedctl_called, 1), 566 prt_addr((void *)ulwp.ul_schedctl, 0)); 567 568 HD("bindflags libc_locks stsd &ftsd"); 569 mdb_printf(OFFSTR, 570 OFFSET(ul_bindflags)); 571 mdb_printf(ulwp.ul_bindflags? "0x%-8x " : "%-10d ", 572 ulwp.ul_bindflags); 573 mdb_printf("%-10d ", ulwp.ul_libc_locks); 574 mdb_printf("%s %s\n", 575 prt_addr(ulwp.ul_stsd, 1), 576 prt_addr((void *)(addr + OFFSET(ul_ftsd[0])), 0)); 577 578 HD("eventmask[0..1] eventnum eventdata"); 579 mdb_printf(OFFSTR "0x%08x 0x%08x %-21d %s\n", 580 OFFSET(ul_td_evbuf.eventmask.event_bits[0]), 581 ulwp.ul_td_evbuf.eventmask.event_bits[0], 582 ulwp.ul_td_evbuf.eventmask.event_bits[1], 583 ulwp.ul_td_evbuf.eventnum, 584 prt_addr(ulwp.ul_td_evbuf.eventdata, 0)); 585 586 HD("td'enable sync'reg qtype cv_wake rtld usropts"); 587 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d ", 588 OFFSET(ul_td_events_enable), 589 ulwp.ul_td_events_enable, 590 ulwp.ul_sync_obj_reg, 591 ulwp.ul_qtype, 592 ulwp.ul_cv_wake, 593 ulwp.ul_rtld); 594 mdb_printf(ulwp.ul_usropts? "0x%x\n" : "%d\n", 595 ulwp.ul_usropts); 596 597 HD("startpc startarg wchan"); 598 mdb_printf(OFFSTR "%s %s %s\n", 599 OFFSET(ul_startpc), 600 prt_addr((void *)ulwp.ul_startpc, 1), 601 prt_addr(ulwp.ul_startarg, 1), 602 prt_addr(ulwp.ul_wchan, 0)); 603 604 HD("link sleepq cvmutex"); 605 mdb_printf(OFFSTR "%s %s %s\n", 606 OFFSET(ul_link), 607 prt_addr(ulwp.ul_link, 1), 608 prt_addr(ulwp.ul_sleepq, 1), 609 prt_addr(ulwp.ul_cvmutex, 0)); 610 611 HD("mxchain save_state"); 612 mdb_printf(OFFSTR "%s %d\n", 613 OFFSET(ul_mxchain), 614 prt_addr(ulwp.ul_mxchain, 1), 615 ulwp.ul_save_state); 616 617 HD("rdlockcnt rd_rwlock rd_count"); 618 mdb_printf(OFFSTR "%-21d %s %d\n", 619 OFFSET(ul_rdlockcnt), 620 ulwp.ul_rdlockcnt, 621 prt_addr(ulwp.ul_readlock.single.rd_rwlock, 1), 622 ulwp.ul_readlock.single.rd_count); 623 624 HD("heldlockcnt heldlocks tpdp"); 625 mdb_printf(OFFSTR "%-21d %s %s\n", 626 OFFSET(ul_heldlockcnt), 627 ulwp.ul_heldlockcnt, 628 prt_addr(ulwp.ul_heldlocks.single, 1), 629 prt_addr(ulwp.ul_tpdp, 0)); 630 631 HD("siglink s'l'spin s'l'spin2 s'l'sleep s'l'wakeup"); 632 mdb_printf(OFFSTR "%s %-10d %-10d %-10d %d\n", 633 OFFSET(ul_siglink), 634 prt_addr(ulwp.ul_siglink, 1), 635 ulwp.ul_spin_lock_spin, 636 ulwp.ul_spin_lock_spin2, 637 ulwp.ul_spin_lock_sleep, 638 ulwp.ul_spin_lock_wakeup); 639 640 HD("&queue_root rtclassid pilocks"); 641 mdb_printf(OFFSTR "%s %-10d %d\n", 642 OFFSET(ul_queue_root), 643 prt_addr((void *)(addr + OFFSET(ul_queue_root)), 1), 644 ulwp.ul_rtclassid, 645 ulwp.ul_pilocks); 646 647 /* 648 * The remainder of the ulwp_t structure 649 * is invalid if this is a replacement. 650 */ 651 if (ulwp.ul_replace) 652 return (DCMD_OK); 653 654 HD("sigmask[0..3]"); 655 mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n", 656 OFFSET(ul_sigmask.__sigbits[0]), 657 ulwp.ul_sigmask.__sigbits[0], 658 ulwp.ul_sigmask.__sigbits[1], 659 ulwp.ul_sigmask.__sigbits[2], 660 ulwp.ul_sigmask.__sigbits[3]); 661 662 HD("tmpmask[0..3]"); 663 mdb_printf(OFFSTR "0x%08x 0x%08x 0x%08x 0x%08x\n", 664 OFFSET(ul_tmpmask.__sigbits[0]), 665 ulwp.ul_tmpmask.__sigbits[0], 666 ulwp.ul_tmpmask.__sigbits[1], 667 ulwp.ul_tmpmask.__sigbits[2], 668 ulwp.ul_tmpmask.__sigbits[3]); 669 670 HD("&siginfo &spinlock &fpuenv"); 671 mdb_printf(OFFSTR "%s %s %s\n", 672 OFFSET(ul_siginfo), 673 prt_addr((void *)(addr + OFFSET(ul_siginfo)), 1), 674 prt_addr((void *)(addr + OFFSET(ul_spinlock)), 1), 675 prt_addr((void *)(addr + OFFSET(ul_fpuenv)), 0)); 676 677 return (DCMD_OK); 678 } 679 680 /* 681 * Get the address of the unique uberdata_t structure. 682 */ 683 static uintptr_t 684 uberdata_addr(void) 685 { 686 uintptr_t uaddr; 687 uintptr_t addr; 688 GElf_Sym sym; 689 690 if (mdb_lookup_by_obj("libc.so.1", "_tdb_bootstrap", &sym) != 0) { 691 mdb_warn("cannot find libc.so.1`_tdb_bootstrap"); 692 return (NULL); 693 } 694 if (mdb_vread(&addr, sizeof (addr), sym.st_value) == sizeof (addr) && 695 addr != NULL && 696 mdb_vread(&uaddr, sizeof (uaddr), addr) == sizeof (uaddr) && 697 uaddr != NULL) { 698 return (uaddr); 699 } 700 if (mdb_lookup_by_obj("libc.so.1", "_uberdata", &sym) != 0) { 701 mdb_warn("cannot find libc.so.1`_uberdata"); 702 return (NULL); 703 } 704 return ((uintptr_t)sym.st_value); 705 } 706 707 #undef OFFSET 708 #define OFFSET(member) ((size_t)OFFSETOF(uberdata_t, member)) 709 710 /*ARGSUSED*/ 711 static int 712 d_uberdata(uintptr_t addr, uint_t flags, int argc, const mdb_arg_t *argv) 713 { 714 uberdata_t uberdata; 715 int i; 716 717 if (argc != 0) 718 return (DCMD_USAGE); 719 if (!(flags & DCMD_ADDRSPEC) && (addr = uberdata_addr()) == NULL) 720 return (DCMD_ERR); 721 722 if (mdb_vread(&uberdata, sizeof (uberdata), addr) != 723 sizeof (uberdata)) { 724 mdb_warn("failed to read uberdata at 0x%p", addr); 725 return (DCMD_ERR); 726 } 727 728 mdb_printf("%#a\n", addr); 729 730 HD("&link_lock &ld_lock &fork_lock"); 731 mdb_printf(OFFSTR "%s %s %s\n", 732 OFFSET(link_lock), 733 prt_addr((void *)(addr + OFFSET(link_lock)), 1), 734 prt_addr((void *)(addr + OFFSET(ld_lock)), 1), 735 prt_addr((void *)(addr + OFFSET(fork_lock)), 0)); 736 737 HD("&atfork_lock &callout_lock &tdb_hash_lock"); 738 mdb_printf(OFFSTR "%s %s %s\n", 739 OFFSET(atfork_lock), 740 prt_addr((void *)(addr + OFFSET(atfork_lock)), 1), 741 prt_addr((void *)(addr + OFFSET(callout_lock)), 1), 742 prt_addr((void *)(addr + OFFSET(tdb_hash_lock)), 0)); 743 744 HD("&tdb_hash_lock_stats &siguaction[0]"); 745 mdb_printf(OFFSTR "%s %s\n", 746 OFFSET(tdb_hash_lock_stats), 747 prt_addr((void *)(addr + OFFSET(tdb_hash_lock_stats)), 1), 748 prt_addr((void *)(addr + OFFSET(siguaction)), 0)); 749 750 HD("&bucket free_list chunks"); 751 for (i = 0; i < NBUCKETS; i++) { 752 mdb_printf(OFFSTR "%s %s %ld\n", 753 OFFSET(bucket[i]), 754 prt_addr((void *)(addr + OFFSET(bucket[i])), 1), 755 prt_addr(uberdata.bucket[i].free_list, 1), 756 uberdata.bucket[i].chunks); 757 } 758 759 HD("&atexit_root head exit_frame_monitor"); 760 mdb_printf(OFFSTR "%s %s %s\n", 761 OFFSET(atexit_root), 762 prt_addr((void *)(addr + OFFSET(atexit_root.exitfns_lock)), 1), 763 prt_addr(uberdata.atexit_root.head, 1), 764 prt_addr(uberdata.atexit_root.exit_frame_monitor, 0)); 765 766 HD("&tsd_metadata tsdm_nkeys tsdm_nused tsdm_destro"); 767 mdb_printf(OFFSTR "%s %-10d %-10d %s\n", 768 OFFSET(tsd_metadata), 769 prt_addr((void *)(addr + OFFSET(tsd_metadata.tsdm_lock)), 1), 770 uberdata.tsd_metadata.tsdm_nkeys, 771 uberdata.tsd_metadata.tsdm_nused, 772 prt_addr((void *)uberdata.tsd_metadata.tsdm_destro, 0)); 773 774 HD("&tls_metadata tls_modinfo.data tls_modinfo.size"); 775 mdb_printf(OFFSTR "%s %s %ld\n", 776 OFFSET(tls_metadata), 777 prt_addr((void *)(addr + OFFSET(tls_metadata.tls_lock)), 1), 778 prt_addr(uberdata.tls_metadata.tls_modinfo.tls_data, 1), 779 uberdata.tls_metadata.tls_modinfo.tls_size); 780 781 HD(" static_tls.data static_tls.size"); 782 mdb_printf(OFFSTR "%s %s %ld\n", 783 OFFSET(tls_metadata.static_tls), 784 " ", 785 prt_addr(uberdata.tls_metadata.static_tls.tls_data, 1), 786 uberdata.tls_metadata.static_tls.tls_size); 787 788 HD("primary_ma bucket_ini uflags.mt uflags.pad uflags.trs uflags.ted"); 789 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %-10d %d\n", 790 OFFSET(primary_map), 791 uberdata.primary_map, 792 uberdata.bucket_init, 793 uberdata.uberflags.uf_x.x_mt, 794 uberdata.uberflags.uf_x.x_pad, 795 uberdata.uberflags.uf_x.x_tdb_register_sync, 796 uberdata.uberflags.uf_x.x_thread_error_detection); 797 798 HD("queue_head thr_hash_table hash_size hash_mask"); 799 mdb_printf(OFFSTR "%s %s %-10d 0x%x\n", 800 OFFSET(queue_head), 801 prt_addr(uberdata.queue_head, 1), 802 prt_addr(uberdata.thr_hash_table, 1), 803 uberdata.hash_size, 804 uberdata.hash_mask); 805 806 HD("ulwp_one all_lwps all_zombies"); 807 mdb_printf(OFFSTR "%s %s %s\n", 808 OFFSET(ulwp_one), 809 prt_addr(uberdata.ulwp_one, 1), 810 prt_addr(uberdata.all_lwps, 1), 811 prt_addr(uberdata.all_zombies, 0)); 812 813 HD("nthreads nzombies ndaemons pid sigacthandler"); 814 mdb_printf(OFFSTR "%-10d %-10d %-10d %-10d %s\n", 815 OFFSET(nthreads), 816 uberdata.nthreads, 817 uberdata.nzombies, 818 uberdata.ndaemons, 819 (int)uberdata.pid, 820 prt_addr((void *)uberdata.sigacthandler, 0)); 821 822 HD("lwp_stacks lwp_laststack nfreestack stk_cache"); 823 mdb_printf(OFFSTR "%s %s %-10d %d\n", 824 OFFSET(lwp_stacks), 825 prt_addr(uberdata.lwp_stacks, 1), 826 prt_addr(uberdata.lwp_laststack, 1), 827 uberdata.nfreestack, 828 uberdata.thread_stack_cache); 829 830 HD("ulwp_freelist ulwp_lastfree ulwp_replace_free"); 831 mdb_printf(OFFSTR "%s %s %s\n", 832 OFFSET(ulwp_freelist), 833 prt_addr(uberdata.ulwp_freelist, 1), 834 prt_addr(uberdata.ulwp_lastfree, 1), 835 prt_addr(uberdata.ulwp_replace_free, 0)); 836 837 HD("ulwp_replace_last atforklist"); 838 mdb_printf(OFFSTR "%s %s\n", 839 OFFSET(ulwp_replace_last), 840 prt_addr(uberdata.ulwp_replace_last, 1), 841 prt_addr(uberdata.atforklist, 0)); 842 843 HD("robustlocks robustlist"); 844 mdb_printf(OFFSTR "%s %s\n", 845 OFFSET(robustlocks), 846 prt_addr(uberdata.robustlocks, 1), 847 prt_addr(uberdata.robustlist, 0)); 848 849 HD("tdb_bootstrap tdb_sync_addr_hash tdb_'count tdb_'fail"); 850 mdb_printf(OFFSTR "%s %s %-10d %d\n", 851 OFFSET(tdb_bootstrap), 852 prt_addr(uberdata.tdb_bootstrap, 1), 853 prt_addr(uberdata.tdb.tdb_sync_addr_hash, 1), 854 uberdata.tdb.tdb_register_count, 855 uberdata.tdb.tdb_hash_alloc_failed); 856 857 HD("tdb_sync_addr_free tdb_sync_addr_last tdb_sync_alloc"); 858 mdb_printf(OFFSTR "%s %s %ld\n", 859 OFFSET(tdb.tdb_sync_addr_free), 860 prt_addr(uberdata.tdb.tdb_sync_addr_free, 1), 861 prt_addr(uberdata.tdb.tdb_sync_addr_last, 1), 862 uberdata.tdb.tdb_sync_alloc); 863 864 HD("tdb_ev_global_mask tdb_events"); 865 mdb_printf(OFFSTR "0x%08x 0x%08x %s\n", 866 OFFSET(tdb.tdb_ev_global_mask), 867 uberdata.tdb.tdb_ev_global_mask.event_bits[0], 868 uberdata.tdb.tdb_ev_global_mask.event_bits[1], 869 prt_addr((void *)uberdata.tdb.tdb_events, 0)); 870 871 return (DCMD_OK); 872 } 873 874 static int 875 ulwp_walk_init(mdb_walk_state_t *wsp) 876 { 877 uintptr_t addr = wsp->walk_addr; 878 uintptr_t uber_addr; 879 880 if (addr == NULL && 881 ((uber_addr = uberdata_addr()) == NULL || 882 mdb_vread(&addr, sizeof (addr), 883 uber_addr + OFFSETOF(uberdata_t, all_lwps)) 884 != sizeof (addr))) { 885 mdb_warn("cannot find 'uberdata.all_lwps'"); 886 return (WALK_ERR); 887 } 888 if (addr == NULL) 889 return (WALK_DONE); 890 wsp->walk_addr = addr; 891 wsp->walk_data = (void *)addr; 892 return (WALK_NEXT); 893 } 894 895 static int 896 ulwp_walk_step(mdb_walk_state_t *wsp) 897 { 898 uintptr_t addr = wsp->walk_addr; 899 ulwp_t ulwp; 900 901 if (addr == NULL) 902 return (WALK_DONE); 903 if (mdb_vread(&ulwp, sizeof (ulwp), addr) != sizeof (ulwp) && 904 (bzero(&ulwp, sizeof (ulwp)), 905 mdb_vread(&ulwp, REPLACEMENT_SIZE, addr)) != REPLACEMENT_SIZE) { 906 mdb_warn("failed to read ulwp at 0x%p", addr); 907 return (WALK_ERR); 908 } 909 /* 910 * If we have looped around to the beginning 911 * of the circular linked list, we are done. 912 */ 913 if ((wsp->walk_addr = (uintptr_t)ulwp.ul_forw) 914 == (uintptr_t)wsp->walk_data) 915 wsp->walk_addr = NULL; 916 return (wsp->walk_callback(addr, &ulwp, wsp->walk_cbdata)); 917 } 918 919 /* Avoid classifying NULL pointers as part of the main stack on x86 */ 920 #define MIN_STACK_ADDR (0x10000ul) 921 922 static int 923 whatis_walk_ulwp(uintptr_t addr, const ulwp_t *ulwp, mdb_whatis_t *w) 924 { 925 uintptr_t cur; 926 lwpid_t id = ulwp->ul_lwpid; 927 uintptr_t top, base, size; 928 929 while (mdb_whatis_match(w, addr, sizeof (ulwp_t), &cur)) 930 mdb_whatis_report_object(w, cur, addr, 931 "allocated as thread %#r's ulwp_t\n", id); 932 933 top = (uintptr_t)ulwp->ul_stktop; 934 size = ulwp->ul_stksiz; 935 936 /* 937 * The main stack ends up being a little weird, especially if 938 * the stack ulimit is unlimited. This tries to take that into 939 * account. 940 */ 941 if (size > top) 942 size = top; 943 if (top > MIN_STACK_ADDR && top - size < MIN_STACK_ADDR) 944 size = top - MIN_STACK_ADDR; 945 946 base = top - size; 947 948 while (mdb_whatis_match(w, base, size, &cur)) 949 mdb_whatis_report_address(w, cur, "in [ stack tid=%#r ]\n", id); 950 951 if (ulwp->ul_ustack.ss_flags & SS_ONSTACK) { 952 base = (uintptr_t)ulwp->ul_ustack.ss_sp; 953 size = ulwp->ul_ustack.ss_size; 954 955 while (mdb_whatis_match(w, base, size, &cur)) 956 mdb_whatis_report_address(w, cur, 957 "in [ altstack tid=%#r ]\n", id); 958 } 959 960 return (WHATIS_WALKRET(w)); 961 } 962 963 /*ARGSUSED*/ 964 static int 965 whatis_run_ulwps(mdb_whatis_t *w, void *arg) 966 { 967 if (mdb_walk("ulwps", (mdb_walk_cb_t)whatis_walk_ulwp, w) == -1) { 968 mdb_warn("couldn't find ulwps walker"); 969 return (1); 970 } 971 return (0); 972 } 973 974 /* 975 * ======================================================= 976 * End of thread (previously libthread) interfaces. 977 * ==================== threads ========================== 978 */ 979 980 static const mdb_dcmd_t dcmds[] = { 981 { "jmp_buf", ":", "print jmp_buf contents", d_jmp_buf, NULL }, 982 { "sigjmp_buf", ":", "print sigjmp_buf contents", d_sigjmp_buf, NULL }, 983 { "siginfo", ":", "print siginfo_t structure", d_siginfo, NULL }, 984 { "ucontext", ":", "print ucontext_t structure", d_ucontext, NULL }, 985 { "ulwp", ":", "print ulwp_t structure", d_ulwp, NULL }, 986 { "uberdata", ":", "print uberdata_t structure", d_uberdata, NULL }, 987 { NULL } 988 }; 989 990 static const mdb_walker_t walkers[] = { 991 { "ucontext", "walk ucontext_t uc_link list", 992 NULL, uc_walk_step, NULL, NULL }, 993 { "oldcontext", "walk per-lwp oldcontext pointers", 994 oldc_walk_init, oldc_walk_step, oldc_walk_fini, NULL }, 995 { "ulwps", "walk list of ulwp_t pointers", 996 ulwp_walk_init, ulwp_walk_step, NULL, NULL }, 997 { NULL } 998 }; 999 1000 static const mdb_modinfo_t modinfo = { MDB_API_VERSION, dcmds, walkers }; 1001 1002 const mdb_modinfo_t * 1003 _mdb_init(void) 1004 { 1005 mdb_whatis_register("threads", whatis_run_ulwps, NULL, 1006 WHATIS_PRIO_EARLY, WHATIS_REG_NO_ID); 1007 1008 return (&modinfo); 1009 } 1010
Indexes created Thu Nov 26 17:05:41 UTC 2009
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