1 /* 2 * Copyright (c) 1997, 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "jvm.h" 27 #include "classfile/classLoader.hpp" 28 #include "classfile/systemDictionary.hpp" 29 #include "classfile/vmSymbols.hpp" 30 #include "code/icBuffer.hpp" 31 #include "code/vtableStubs.hpp" 32 #include "compiler/compileBroker.hpp" 33 #include "compiler/disassembler.hpp" 34 #include "interpreter/interpreter.hpp" 35 #include "logging/log.hpp" 36 #include "memory/allocation.inline.hpp" 37 #include "memory/filemap.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "os_share_solaris.hpp" 40 #include "os_solaris.inline.hpp" 41 #include "prims/jniFastGetField.hpp" 42 #include "prims/jvm_misc.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/atomic.hpp" 45 #include "runtime/extendedPC.hpp" 46 #include "runtime/globals.hpp" 47 #include "runtime/interfaceSupport.inline.hpp" 48 #include "runtime/java.hpp" 49 #include "runtime/javaCalls.hpp" 50 #include "runtime/mutexLocker.hpp" 51 #include "runtime/objectMonitor.hpp" 52 #include "runtime/orderAccess.hpp" 53 #include "runtime/osThread.hpp" 54 #include "runtime/perfMemory.hpp" 55 #include "runtime/sharedRuntime.hpp" 56 #include "runtime/statSampler.hpp" 57 #include "runtime/stubRoutines.hpp" 58 #include "runtime/thread.inline.hpp" 59 #include "runtime/threadCritical.hpp" 60 #include "runtime/timer.hpp" 61 #include "runtime/vm_version.hpp" 62 #include "semaphore_posix.hpp" 63 #include "services/attachListener.hpp" 64 #include "services/memTracker.hpp" 65 #include "services/runtimeService.hpp" 66 #include "utilities/align.hpp" 67 #include "utilities/decoder.hpp" 68 #include "utilities/defaultStream.hpp" 69 #include "utilities/events.hpp" 70 #include "utilities/growableArray.hpp" 71 #include "utilities/macros.hpp" 72 #include "utilities/vmError.hpp" 73 74 // put OS-includes here 75 # include <dlfcn.h> 76 # include <errno.h> 77 # include <exception> 78 # include <link.h> 79 # include <poll.h> 80 # include <pthread.h> 81 # include <setjmp.h> 82 # include <signal.h> 83 # include <stdio.h> 84 # include <alloca.h> 85 # include <sys/filio.h> 86 # include <sys/ipc.h> 87 # include <sys/lwp.h> 88 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 89 # include <sys/mman.h> 90 # include <sys/processor.h> 91 # include <sys/procset.h> 92 # include <sys/pset.h> 93 # include <sys/resource.h> 94 # include <sys/shm.h> 95 # include <sys/socket.h> 96 # include <sys/stat.h> 97 # include <sys/systeminfo.h> 98 # include <sys/time.h> 99 # include <sys/times.h> 100 # include <sys/types.h> 101 # include <sys/wait.h> 102 # include <sys/utsname.h> 103 # include <thread.h> 104 # include <unistd.h> 105 # include <sys/priocntl.h> 106 # include <sys/rtpriocntl.h> 107 # include <sys/tspriocntl.h> 108 # include <sys/iapriocntl.h> 109 # include <sys/fxpriocntl.h> 110 # include <sys/loadavg.h> 111 # include <string.h> 112 # include <stdio.h> 113 114 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 115 # include <sys/procfs.h> // see comment in <sys/procfs.h> 116 117 #define MAX_PATH (2 * K) 118 119 // for timer info max values which include all bits 120 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 121 122 123 // Here are some liblgrp types from sys/lgrp_user.h to be able to 124 // compile on older systems without this header file. 125 126 #ifndef MADV_ACCESS_LWP 127 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 128 #endif 129 #ifndef MADV_ACCESS_MANY 130 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 131 #endif 132 133 #ifndef LGRP_RSRC_CPU 134 #define LGRP_RSRC_CPU 0 /* CPU resources */ 135 #endif 136 #ifndef LGRP_RSRC_MEM 137 #define LGRP_RSRC_MEM 1 /* memory resources */ 138 #endif 139 140 // Values for ThreadPriorityPolicy == 1 141 int prio_policy1[CriticalPriority+1] = { 142 -99999, 0, 16, 32, 48, 64, 143 80, 96, 112, 124, 127, 127 }; 144 145 // System parameters used internally 146 static clock_t clock_tics_per_sec = 100; 147 148 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 149 static bool enabled_extended_FILE_stdio = false; 150 151 // For diagnostics to print a message once. see run_periodic_checks 152 static bool check_addr0_done = false; 153 static sigset_t check_signal_done; 154 static bool check_signals = true; 155 156 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 157 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 158 159 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 160 161 os::Solaris::pthread_setname_np_func_t os::Solaris::_pthread_setname_np = NULL; 162 163 // "default" initializers for missing libc APIs 164 extern "C" { 165 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 166 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 167 168 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 169 static int lwp_cond_destroy(cond_t *cv) { return 0; } 170 } 171 172 // "default" initializers for pthread-based synchronization 173 extern "C" { 174 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 175 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 176 } 177 178 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 179 180 static inline size_t adjust_stack_size(address base, size_t size) { 181 if ((ssize_t)size < 0) { 182 // 4759953: Compensate for ridiculous stack size. 183 size = max_intx; 184 } 185 if (size > (size_t)base) { 186 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 187 size = (size_t)base; 188 } 189 return size; 190 } 191 192 static inline stack_t get_stack_info() { 193 stack_t st; 194 int retval = thr_stksegment(&st); 195 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 196 assert(retval == 0, "incorrect return value from thr_stksegment"); 197 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 198 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 199 return st; 200 } 201 202 bool os::is_primordial_thread(void) { 203 int r = thr_main(); 204 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 205 return r == 1; 206 } 207 208 address os::current_stack_base() { 209 bool _is_primordial_thread = is_primordial_thread(); 210 211 // Workaround 4352906, avoid calls to thr_stksegment by 212 // thr_main after the first one (it looks like we trash 213 // some data, causing the value for ss_sp to be incorrect). 214 if (!_is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 215 stack_t st = get_stack_info(); 216 if (_is_primordial_thread) { 217 // cache initial value of stack base 218 os::Solaris::_main_stack_base = (address)st.ss_sp; 219 } 220 return (address)st.ss_sp; 221 } else { 222 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 223 return os::Solaris::_main_stack_base; 224 } 225 } 226 227 size_t os::current_stack_size() { 228 size_t size; 229 230 if (!is_primordial_thread()) { 231 size = get_stack_info().ss_size; 232 } else { 233 struct rlimit limits; 234 getrlimit(RLIMIT_STACK, &limits); 235 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 236 } 237 // base may not be page aligned 238 address base = current_stack_base(); 239 address bottom = align_up(base - size, os::vm_page_size());; 240 return (size_t)(base - bottom); 241 } 242 243 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 244 return localtime_r(clock, res); 245 } 246 247 void os::Solaris::try_enable_extended_io() { 248 typedef int (*enable_extended_FILE_stdio_t)(int, int); 249 250 if (!UseExtendedFileIO) { 251 return; 252 } 253 254 enable_extended_FILE_stdio_t enabler = 255 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 256 "enable_extended_FILE_stdio"); 257 if (enabler) { 258 enabler(-1, -1); 259 } 260 } 261 262 static int _processors_online = 0; 263 264 jint os::Solaris::_os_thread_limit = 0; 265 volatile jint os::Solaris::_os_thread_count = 0; 266 267 julong os::available_memory() { 268 return Solaris::available_memory(); 269 } 270 271 julong os::Solaris::available_memory() { 272 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 273 } 274 275 julong os::Solaris::_physical_memory = 0; 276 277 julong os::physical_memory() { 278 return Solaris::physical_memory(); 279 } 280 281 static hrtime_t first_hrtime = 0; 282 static const hrtime_t hrtime_hz = 1000*1000*1000; 283 static volatile hrtime_t max_hrtime = 0; 284 285 286 void os::Solaris::initialize_system_info() { 287 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 288 _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 289 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 290 (julong)sysconf(_SC_PAGESIZE); 291 } 292 293 uint os::processor_id() { 294 const processorid_t id = ::getcpuid(); 295 assert(id >= 0 && id < _processor_count, "Invalid processor id"); 296 return (uint)id; 297 } 298 299 int os::active_processor_count() { 300 // User has overridden the number of active processors 301 if (ActiveProcessorCount > 0) { 302 log_trace(os)("active_processor_count: " 303 "active processor count set by user : %d", 304 ActiveProcessorCount); 305 return ActiveProcessorCount; 306 } 307 308 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 309 pid_t pid = getpid(); 310 psetid_t pset = PS_NONE; 311 // Are we running in a processor set or is there any processor set around? 312 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 313 uint_t pset_cpus; 314 // Query the number of cpus available to us. 315 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 316 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 317 _processors_online = pset_cpus; 318 return pset_cpus; 319 } 320 } 321 // Otherwise return number of online cpus 322 return online_cpus; 323 } 324 325 static bool find_processors_in_pset(psetid_t pset, 326 processorid_t** id_array, 327 uint_t* id_length) { 328 bool result = false; 329 // Find the number of processors in the processor set. 330 if (pset_info(pset, NULL, id_length, NULL) == 0) { 331 // Make up an array to hold their ids. 332 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 333 // Fill in the array with their processor ids. 334 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 335 result = true; 336 } 337 } 338 return result; 339 } 340 341 // Callers of find_processors_online() must tolerate imprecise results -- 342 // the system configuration can change asynchronously because of DR 343 // or explicit psradm operations. 344 // 345 // We also need to take care that the loop (below) terminates as the 346 // number of processors online can change between the _SC_NPROCESSORS_ONLN 347 // request and the loop that builds the list of processor ids. Unfortunately 348 // there's no reliable way to determine the maximum valid processor id, 349 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 350 // man pages, which claim the processor id set is "sparse, but 351 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 352 // exit the loop. 353 // 354 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 355 // not available on S8.0. 356 357 static bool find_processors_online(processorid_t** id_array, 358 uint* id_length) { 359 const processorid_t MAX_PROCESSOR_ID = 100000; 360 // Find the number of processors online. 361 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 362 // Make up an array to hold their ids. 363 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 364 // Processors need not be numbered consecutively. 365 long found = 0; 366 processorid_t next = 0; 367 while (found < *id_length && next < MAX_PROCESSOR_ID) { 368 processor_info_t info; 369 if (processor_info(next, &info) == 0) { 370 // NB, PI_NOINTR processors are effectively online ... 371 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 372 (*id_array)[found] = next; 373 found += 1; 374 } 375 } 376 next += 1; 377 } 378 if (found < *id_length) { 379 // The loop above didn't identify the expected number of processors. 380 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 381 // and re-running the loop, above, but there's no guarantee of progress 382 // if the system configuration is in flux. Instead, we just return what 383 // we've got. Note that in the worst case find_processors_online() could 384 // return an empty set. (As a fall-back in the case of the empty set we 385 // could just return the ID of the current processor). 386 *id_length = found; 387 } 388 389 return true; 390 } 391 392 static bool assign_distribution(processorid_t* id_array, 393 uint id_length, 394 uint* distribution, 395 uint distribution_length) { 396 // We assume we can assign processorid_t's to uint's. 397 assert(sizeof(processorid_t) == sizeof(uint), 398 "can't convert processorid_t to uint"); 399 // Quick check to see if we won't succeed. 400 if (id_length < distribution_length) { 401 return false; 402 } 403 // Assign processor ids to the distribution. 404 // Try to shuffle processors to distribute work across boards, 405 // assuming 4 processors per board. 406 const uint processors_per_board = ProcessDistributionStride; 407 // Find the maximum processor id. 408 processorid_t max_id = 0; 409 for (uint m = 0; m < id_length; m += 1) { 410 max_id = MAX2(max_id, id_array[m]); 411 } 412 // The next id, to limit loops. 413 const processorid_t limit_id = max_id + 1; 414 // Make up markers for available processors. 415 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 416 for (uint c = 0; c < limit_id; c += 1) { 417 available_id[c] = false; 418 } 419 for (uint a = 0; a < id_length; a += 1) { 420 available_id[id_array[a]] = true; 421 } 422 // Step by "boards", then by "slot", copying to "assigned". 423 // NEEDS_CLEANUP: The assignment of processors should be stateful, 424 // remembering which processors have been assigned by 425 // previous calls, etc., so as to distribute several 426 // independent calls of this method. What we'd like is 427 // It would be nice to have an API that let us ask 428 // how many processes are bound to a processor, 429 // but we don't have that, either. 430 // In the short term, "board" is static so that 431 // subsequent distributions don't all start at board 0. 432 static uint board = 0; 433 uint assigned = 0; 434 // Until we've found enough processors .... 435 while (assigned < distribution_length) { 436 // ... find the next available processor in the board. 437 for (uint slot = 0; slot < processors_per_board; slot += 1) { 438 uint try_id = board * processors_per_board + slot; 439 if ((try_id < limit_id) && (available_id[try_id] == true)) { 440 distribution[assigned] = try_id; 441 available_id[try_id] = false; 442 assigned += 1; 443 break; 444 } 445 } 446 board += 1; 447 if (board * processors_per_board + 0 >= limit_id) { 448 board = 0; 449 } 450 } 451 if (available_id != NULL) { 452 FREE_C_HEAP_ARRAY(bool, available_id); 453 } 454 return true; 455 } 456 457 void os::set_native_thread_name(const char *name) { 458 if (Solaris::_pthread_setname_np != NULL) { 459 // Only the first 31 bytes of 'name' are processed by pthread_setname_np 460 // but we explicitly copy into a size-limited buffer to avoid any 461 // possible overflow. 462 char buf[32]; 463 snprintf(buf, sizeof(buf), "%s", name); 464 buf[sizeof(buf) - 1] = '\0'; 465 Solaris::_pthread_setname_np(pthread_self(), buf); 466 } 467 } 468 469 bool os::distribute_processes(uint length, uint* distribution) { 470 bool result = false; 471 // Find the processor id's of all the available CPUs. 472 processorid_t* id_array = NULL; 473 uint id_length = 0; 474 // There are some races between querying information and using it, 475 // since processor sets can change dynamically. 476 psetid_t pset = PS_NONE; 477 // Are we running in a processor set? 478 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 479 result = find_processors_in_pset(pset, &id_array, &id_length); 480 } else { 481 result = find_processors_online(&id_array, &id_length); 482 } 483 if (result == true) { 484 if (id_length >= length) { 485 result = assign_distribution(id_array, id_length, distribution, length); 486 } else { 487 result = false; 488 } 489 } 490 if (id_array != NULL) { 491 FREE_C_HEAP_ARRAY(processorid_t, id_array); 492 } 493 return result; 494 } 495 496 bool os::bind_to_processor(uint processor_id) { 497 // We assume that a processorid_t can be stored in a uint. 498 assert(sizeof(uint) == sizeof(processorid_t), 499 "can't convert uint to processorid_t"); 500 int bind_result = 501 processor_bind(P_LWPID, // bind LWP. 502 P_MYID, // bind current LWP. 503 (processorid_t) processor_id, // id. 504 NULL); // don't return old binding. 505 return (bind_result == 0); 506 } 507 508 // Return true if user is running as root. 509 510 bool os::have_special_privileges() { 511 static bool init = false; 512 static bool privileges = false; 513 if (!init) { 514 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 515 init = true; 516 } 517 return privileges; 518 } 519 520 521 void os::init_system_properties_values() { 522 // The next steps are taken in the product version: 523 // 524 // Obtain the JAVA_HOME value from the location of libjvm.so. 525 // This library should be located at: 526 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 527 // 528 // If "/jre/lib/" appears at the right place in the path, then we 529 // assume libjvm.so is installed in a JDK and we use this path. 530 // 531 // Otherwise exit with message: "Could not create the Java virtual machine." 532 // 533 // The following extra steps are taken in the debugging version: 534 // 535 // If "/jre/lib/" does NOT appear at the right place in the path 536 // instead of exit check for $JAVA_HOME environment variable. 537 // 538 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 539 // then we append a fake suffix "hotspot/libjvm.so" to this path so 540 // it looks like libjvm.so is installed there 541 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 542 // 543 // Otherwise exit. 544 // 545 // Important note: if the location of libjvm.so changes this 546 // code needs to be changed accordingly. 547 548 // Base path of extensions installed on the system. 549 #define SYS_EXT_DIR "/usr/jdk/packages" 550 #define EXTENSIONS_DIR "/lib/ext" 551 552 // Buffer that fits several sprintfs. 553 // Note that the space for the colon and the trailing null are provided 554 // by the nulls included by the sizeof operator. 555 const size_t bufsize = 556 MAX3((size_t)MAXPATHLEN, // For dll_dir & friends. 557 sizeof(SYS_EXT_DIR) + sizeof("/lib/"), // invariant ld_library_path 558 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR)); // extensions dir 559 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 560 561 // sysclasspath, java_home, dll_dir 562 { 563 char *pslash; 564 os::jvm_path(buf, bufsize); 565 566 // Found the full path to libjvm.so. 567 // Now cut the path to <java_home>/jre if we can. 568 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 569 pslash = strrchr(buf, '/'); 570 if (pslash != NULL) { 571 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 572 } 573 Arguments::set_dll_dir(buf); 574 575 if (pslash != NULL) { 576 pslash = strrchr(buf, '/'); 577 if (pslash != NULL) { 578 *pslash = '\0'; // Get rid of /lib. 579 } 580 } 581 Arguments::set_java_home(buf); 582 if (!set_boot_path('/', ':')) { 583 vm_exit_during_initialization("Failed setting boot class path.", NULL); 584 } 585 } 586 587 // Where to look for native libraries. 588 { 589 // Use dlinfo() to determine the correct java.library.path. 590 // 591 // If we're launched by the Java launcher, and the user 592 // does not set java.library.path explicitly on the commandline, 593 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 594 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 595 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 596 // /usr/lib), which is exactly what we want. 597 // 598 // If the user does set java.library.path, it completely 599 // overwrites this setting, and always has. 600 // 601 // If we're not launched by the Java launcher, we may 602 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 603 // settings. Again, dlinfo does exactly what we want. 604 605 Dl_serinfo info_sz, *info = &info_sz; 606 Dl_serpath *path; 607 char *library_path; 608 char *common_path = buf; 609 610 // Determine search path count and required buffer size. 611 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 612 FREE_C_HEAP_ARRAY(char, buf); 613 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 614 } 615 616 // Allocate new buffer and initialize. 617 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 618 info->dls_size = info_sz.dls_size; 619 info->dls_cnt = info_sz.dls_cnt; 620 621 // Obtain search path information. 622 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 623 FREE_C_HEAP_ARRAY(char, buf); 624 FREE_C_HEAP_ARRAY(char, info); 625 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 626 } 627 628 path = &info->dls_serpath[0]; 629 630 // Note: Due to a legacy implementation, most of the library path 631 // is set in the launcher. This was to accomodate linking restrictions 632 // on legacy Solaris implementations (which are no longer supported). 633 // Eventually, all the library path setting will be done here. 634 // 635 // However, to prevent the proliferation of improperly built native 636 // libraries, the new path component /usr/jdk/packages is added here. 637 638 // Construct the invariant part of ld_library_path. 639 sprintf(common_path, SYS_EXT_DIR "/lib"); 640 641 // Struct size is more than sufficient for the path components obtained 642 // through the dlinfo() call, so only add additional space for the path 643 // components explicitly added here. 644 size_t library_path_size = info->dls_size + strlen(common_path); 645 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 646 library_path[0] = '\0'; 647 648 // Construct the desired Java library path from the linker's library 649 // search path. 650 // 651 // For compatibility, it is optimal that we insert the additional path 652 // components specific to the Java VM after those components specified 653 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 654 // infrastructure. 655 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 656 strcpy(library_path, common_path); 657 } else { 658 int inserted = 0; 659 int i; 660 for (i = 0; i < info->dls_cnt; i++, path++) { 661 uint_t flags = path->dls_flags & LA_SER_MASK; 662 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 663 strcat(library_path, common_path); 664 strcat(library_path, os::path_separator()); 665 inserted = 1; 666 } 667 strcat(library_path, path->dls_name); 668 strcat(library_path, os::path_separator()); 669 } 670 // Eliminate trailing path separator. 671 library_path[strlen(library_path)-1] = '\0'; 672 } 673 674 // happens before argument parsing - can't use a trace flag 675 // tty->print_raw("init_system_properties_values: native lib path: "); 676 // tty->print_raw_cr(library_path); 677 678 // Callee copies into its own buffer. 679 Arguments::set_library_path(library_path); 680 681 FREE_C_HEAP_ARRAY(char, library_path); 682 FREE_C_HEAP_ARRAY(char, info); 683 } 684 685 // Extensions directories. 686 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 687 Arguments::set_ext_dirs(buf); 688 689 FREE_C_HEAP_ARRAY(char, buf); 690 691 #undef SYS_EXT_DIR 692 #undef EXTENSIONS_DIR 693 } 694 695 void os::breakpoint() { 696 BREAKPOINT; 697 } 698 699 bool os::obsolete_option(const JavaVMOption *option) { 700 if (!strncmp(option->optionString, "-Xt", 3)) { 701 return true; 702 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 703 return true; 704 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 705 return true; 706 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 707 return true; 708 } 709 return false; 710 } 711 712 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 713 address stackStart = (address)thread->stack_base(); 714 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 715 if (sp < stackStart && sp >= stackEnd) return true; 716 return false; 717 } 718 719 extern "C" void breakpoint() { 720 // use debugger to set breakpoint here 721 } 722 723 static thread_t main_thread; 724 725 // Thread start routine for all newly created threads 726 extern "C" void* thread_native_entry(void* thread_addr) { 727 // Try to randomize the cache line index of hot stack frames. 728 // This helps when threads of the same stack traces evict each other's 729 // cache lines. The threads can be either from the same JVM instance, or 730 // from different JVM instances. The benefit is especially true for 731 // processors with hyperthreading technology. 732 static int counter = 0; 733 int pid = os::current_process_id(); 734 alloca(((pid ^ counter++) & 7) * 128); 735 736 int prio; 737 Thread* thread = (Thread*)thread_addr; 738 739 thread->initialize_thread_current(); 740 741 OSThread* osthr = thread->osthread(); 742 743 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 744 745 log_info(os, thread)("Thread is alive (tid: " UINTX_FORMAT ").", 746 os::current_thread_id()); 747 748 if (UseNUMA) { 749 int lgrp_id = os::numa_get_group_id(); 750 if (lgrp_id != -1) { 751 thread->set_lgrp_id(lgrp_id); 752 } 753 } 754 755 // Our priority was set when we were created, and stored in the 756 // osthread, but couldn't be passed through to our LWP until now. 757 // So read back the priority and set it again. 758 759 if (osthr->thread_id() != -1) { 760 if (UseThreadPriorities) { 761 int prio = osthr->native_priority(); 762 if (ThreadPriorityVerbose) { 763 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 764 INTPTR_FORMAT ", setting priority: %d\n", 765 osthr->thread_id(), osthr->lwp_id(), prio); 766 } 767 os::set_native_priority(thread, prio); 768 } 769 } else if (ThreadPriorityVerbose) { 770 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 771 } 772 773 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 774 775 // initialize signal mask for this thread 776 os::Solaris::hotspot_sigmask(thread); 777 778 thread->run(); 779 780 // One less thread is executing 781 // When the VMThread gets here, the main thread may have already exited 782 // which frees the CodeHeap containing the Atomic::dec code 783 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 784 Atomic::dec(&os::Solaris::_os_thread_count); 785 } 786 787 log_info(os, thread)("Thread finished (tid: " UINTX_FORMAT ").", os::current_thread_id()); 788 789 // If a thread has not deleted itself ("delete this") as part of its 790 // termination sequence, we have to ensure thread-local-storage is 791 // cleared before we actually terminate. No threads should ever be 792 // deleted asynchronously with respect to their termination. 793 if (Thread::current_or_null_safe() != NULL) { 794 assert(Thread::current_or_null_safe() == thread, "current thread is wrong"); 795 thread->clear_thread_current(); 796 } 797 798 if (UseDetachedThreads) { 799 thr_exit(NULL); 800 ShouldNotReachHere(); 801 } 802 return NULL; 803 } 804 805 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 806 // Allocate the OSThread object 807 OSThread* osthread = new OSThread(NULL, NULL); 808 if (osthread == NULL) return NULL; 809 810 // Store info on the Solaris thread into the OSThread 811 osthread->set_thread_id(thread_id); 812 osthread->set_lwp_id(_lwp_self()); 813 814 if (UseNUMA) { 815 int lgrp_id = os::numa_get_group_id(); 816 if (lgrp_id != -1) { 817 thread->set_lgrp_id(lgrp_id); 818 } 819 } 820 821 if (ThreadPriorityVerbose) { 822 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 823 osthread->thread_id(), osthread->lwp_id()); 824 } 825 826 // Initial thread state is INITIALIZED, not SUSPENDED 827 osthread->set_state(INITIALIZED); 828 829 return osthread; 830 } 831 832 void os::Solaris::hotspot_sigmask(Thread* thread) { 833 //Save caller's signal mask 834 sigset_t sigmask; 835 pthread_sigmask(SIG_SETMASK, NULL, &sigmask); 836 OSThread *osthread = thread->osthread(); 837 osthread->set_caller_sigmask(sigmask); 838 839 pthread_sigmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 840 if (!ReduceSignalUsage) { 841 if (thread->is_VM_thread()) { 842 // Only the VM thread handles BREAK_SIGNAL ... 843 pthread_sigmask(SIG_UNBLOCK, vm_signals(), NULL); 844 } else { 845 // ... all other threads block BREAK_SIGNAL 846 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 847 pthread_sigmask(SIG_BLOCK, vm_signals(), NULL); 848 } 849 } 850 } 851 852 bool os::create_attached_thread(JavaThread* thread) { 853 #ifdef ASSERT 854 thread->verify_not_published(); 855 #endif 856 OSThread* osthread = create_os_thread(thread, thr_self()); 857 if (osthread == NULL) { 858 return false; 859 } 860 861 // Initial thread state is RUNNABLE 862 osthread->set_state(RUNNABLE); 863 thread->set_osthread(osthread); 864 865 // initialize signal mask for this thread 866 // and save the caller's signal mask 867 os::Solaris::hotspot_sigmask(thread); 868 869 log_info(os, thread)("Thread attached (tid: " UINTX_FORMAT ").", 870 os::current_thread_id()); 871 872 return true; 873 } 874 875 bool os::create_main_thread(JavaThread* thread) { 876 #ifdef ASSERT 877 thread->verify_not_published(); 878 #endif 879 if (_starting_thread == NULL) { 880 _starting_thread = create_os_thread(thread, main_thread); 881 if (_starting_thread == NULL) { 882 return false; 883 } 884 } 885 886 // The primodial thread is runnable from the start 887 _starting_thread->set_state(RUNNABLE); 888 889 thread->set_osthread(_starting_thread); 890 891 // initialize signal mask for this thread 892 // and save the caller's signal mask 893 os::Solaris::hotspot_sigmask(thread); 894 895 return true; 896 } 897 898 // Helper function to trace thread attributes, similar to os::Posix::describe_pthread_attr() 899 static char* describe_thr_create_attributes(char* buf, size_t buflen, 900 size_t stacksize, long flags) { 901 stringStream ss(buf, buflen); 902 ss.print("stacksize: " SIZE_FORMAT "k, ", stacksize / 1024); 903 ss.print("flags: "); 904 #define PRINT_FLAG(f) if (flags & f) ss.print( #f " "); 905 #define ALL(X) \ 906 X(THR_SUSPENDED) \ 907 X(THR_DETACHED) \ 908 X(THR_BOUND) \ 909 X(THR_NEW_LWP) \ 910 X(THR_DAEMON) 911 ALL(PRINT_FLAG) 912 #undef ALL 913 #undef PRINT_FLAG 914 return buf; 915 } 916 917 // return default stack size for thr_type 918 size_t os::Posix::default_stack_size(os::ThreadType thr_type) { 919 // default stack size when not specified by caller is 1M (2M for LP64) 920 size_t s = (BytesPerWord >> 2) * K * K; 921 return s; 922 } 923 924 bool os::create_thread(Thread* thread, ThreadType thr_type, 925 size_t req_stack_size) { 926 // Allocate the OSThread object 927 OSThread* osthread = new OSThread(NULL, NULL); 928 if (osthread == NULL) { 929 return false; 930 } 931 932 if (ThreadPriorityVerbose) { 933 char *thrtyp; 934 switch (thr_type) { 935 case vm_thread: 936 thrtyp = (char *)"vm"; 937 break; 938 case cgc_thread: 939 thrtyp = (char *)"cgc"; 940 break; 941 case pgc_thread: 942 thrtyp = (char *)"pgc"; 943 break; 944 case java_thread: 945 thrtyp = (char *)"java"; 946 break; 947 case compiler_thread: 948 thrtyp = (char *)"compiler"; 949 break; 950 case watcher_thread: 951 thrtyp = (char *)"watcher"; 952 break; 953 default: 954 thrtyp = (char *)"unknown"; 955 break; 956 } 957 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 958 } 959 960 // calculate stack size if it's not specified by caller 961 size_t stack_size = os::Posix::get_initial_stack_size(thr_type, req_stack_size); 962 963 // Initial state is ALLOCATED but not INITIALIZED 964 osthread->set_state(ALLOCATED); 965 966 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 967 // We got lots of threads. Check if we still have some address space left. 968 // Need to be at least 5Mb of unreserved address space. We do check by 969 // trying to reserve some. 970 const size_t VirtualMemoryBangSize = 20*K*K; 971 char* mem = os::reserve_memory(VirtualMemoryBangSize); 972 if (mem == NULL) { 973 delete osthread; 974 return false; 975 } else { 976 // Release the memory again 977 os::release_memory(mem, VirtualMemoryBangSize); 978 } 979 } 980 981 // Setup osthread because the child thread may need it. 982 thread->set_osthread(osthread); 983 984 // Create the Solaris thread 985 thread_t tid = 0; 986 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 987 int status; 988 989 // Mark that we don't have an lwp or thread id yet. 990 // In case we attempt to set the priority before the thread starts. 991 osthread->set_lwp_id(-1); 992 osthread->set_thread_id(-1); 993 994 status = thr_create(NULL, stack_size, thread_native_entry, thread, flags, &tid); 995 996 char buf[64]; 997 if (status == 0) { 998 log_info(os, thread)("Thread started (tid: " UINTX_FORMAT ", attributes: %s). ", 999 (uintx) tid, describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1000 } else { 1001 log_warning(os, thread)("Failed to start thread - thr_create failed (%s) for attributes: %s.", 1002 os::errno_name(status), describe_thr_create_attributes(buf, sizeof(buf), stack_size, flags)); 1003 } 1004 1005 if (status != 0) { 1006 thread->set_osthread(NULL); 1007 // Need to clean up stuff we've allocated so far 1008 delete osthread; 1009 return false; 1010 } 1011 1012 Atomic::inc(&os::Solaris::_os_thread_count); 1013 1014 // Store info on the Solaris thread into the OSThread 1015 osthread->set_thread_id(tid); 1016 1017 // Remember that we created this thread so we can set priority on it 1018 osthread->set_vm_created(); 1019 1020 // Most thread types will set an explicit priority before starting the thread, 1021 // but for those that don't we need a valid value to read back in thread_native_entry. 1022 osthread->set_native_priority(NormPriority); 1023 1024 // Initial thread state is INITIALIZED, not SUSPENDED 1025 osthread->set_state(INITIALIZED); 1026 1027 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1028 return true; 1029 } 1030 1031 debug_only(static bool signal_sets_initialized = false); 1032 static sigset_t unblocked_sigs, vm_sigs; 1033 1034 void os::Solaris::signal_sets_init() { 1035 // Should also have an assertion stating we are still single-threaded. 1036 assert(!signal_sets_initialized, "Already initialized"); 1037 // Fill in signals that are necessarily unblocked for all threads in 1038 // the VM. Currently, we unblock the following signals: 1039 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1040 // by -Xrs (=ReduceSignalUsage)); 1041 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1042 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1043 // the dispositions or masks wrt these signals. 1044 // Programs embedding the VM that want to use the above signals for their 1045 // own purposes must, at this time, use the "-Xrs" option to prevent 1046 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1047 // (See bug 4345157, and other related bugs). 1048 // In reality, though, unblocking these signals is really a nop, since 1049 // these signals are not blocked by default. 1050 sigemptyset(&unblocked_sigs); 1051 sigaddset(&unblocked_sigs, SIGILL); 1052 sigaddset(&unblocked_sigs, SIGSEGV); 1053 sigaddset(&unblocked_sigs, SIGBUS); 1054 sigaddset(&unblocked_sigs, SIGFPE); 1055 sigaddset(&unblocked_sigs, ASYNC_SIGNAL); 1056 1057 if (!ReduceSignalUsage) { 1058 if (!os::Posix::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1059 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1060 } 1061 if (!os::Posix::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1062 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1063 } 1064 if (!os::Posix::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1065 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1066 } 1067 } 1068 // Fill in signals that are blocked by all but the VM thread. 1069 sigemptyset(&vm_sigs); 1070 if (!ReduceSignalUsage) { 1071 sigaddset(&vm_sigs, BREAK_SIGNAL); 1072 } 1073 debug_only(signal_sets_initialized = true); 1074 1075 // For diagnostics only used in run_periodic_checks 1076 sigemptyset(&check_signal_done); 1077 } 1078 1079 // These are signals that are unblocked while a thread is running Java. 1080 // (For some reason, they get blocked by default.) 1081 sigset_t* os::Solaris::unblocked_signals() { 1082 assert(signal_sets_initialized, "Not initialized"); 1083 return &unblocked_sigs; 1084 } 1085 1086 // These are the signals that are blocked while a (non-VM) thread is 1087 // running Java. Only the VM thread handles these signals. 1088 sigset_t* os::Solaris::vm_signals() { 1089 assert(signal_sets_initialized, "Not initialized"); 1090 return &vm_sigs; 1091 } 1092 1093 void _handle_uncaught_cxx_exception() { 1094 VMError::report_and_die("An uncaught C++ exception"); 1095 } 1096 1097 1098 // First crack at OS-specific initialization, from inside the new thread. 1099 void os::initialize_thread(Thread* thr) { 1100 if (is_primordial_thread()) { 1101 JavaThread* jt = (JavaThread *)thr; 1102 assert(jt != NULL, "Sanity check"); 1103 size_t stack_size; 1104 address base = jt->stack_base(); 1105 if (Arguments::created_by_java_launcher()) { 1106 // Use 2MB to allow for Solaris 7 64 bit mode. 1107 stack_size = JavaThread::stack_size_at_create() == 0 1108 ? 2048*K : JavaThread::stack_size_at_create(); 1109 1110 // There are rare cases when we may have already used more than 1111 // the basic stack size allotment before this method is invoked. 1112 // Attempt to allow for a normally sized java_stack. 1113 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1114 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1115 } else { 1116 // 6269555: If we were not created by a Java launcher, i.e. if we are 1117 // running embedded in a native application, treat the primordial thread 1118 // as much like a native attached thread as possible. This means using 1119 // the current stack size from thr_stksegment(), unless it is too large 1120 // to reliably setup guard pages. A reasonable max size is 8MB. 1121 size_t current_size = current_stack_size(); 1122 // This should never happen, but just in case.... 1123 if (current_size == 0) current_size = 2 * K * K; 1124 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1125 } 1126 address bottom = align_up(base - stack_size, os::vm_page_size());; 1127 stack_size = (size_t)(base - bottom); 1128 1129 assert(stack_size > 0, "Stack size calculation problem"); 1130 1131 if (stack_size > jt->stack_size()) { 1132 #ifndef PRODUCT 1133 struct rlimit limits; 1134 getrlimit(RLIMIT_STACK, &limits); 1135 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1136 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1137 #endif 1138 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1139 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1140 "See limit(1) to increase the stack size limit.", 1141 stack_size / K, jt->stack_size() / K); 1142 vm_exit(1); 1143 } 1144 assert(jt->stack_size() >= stack_size, 1145 "Attempt to map more stack than was allocated"); 1146 jt->set_stack_size(stack_size); 1147 } 1148 1149 // With the T2 libthread (T1 is no longer supported) threads are always bound 1150 // and we use stackbanging in all cases. 1151 1152 os::Solaris::init_thread_fpu_state(); 1153 std::set_terminate(_handle_uncaught_cxx_exception); 1154 } 1155 1156 1157 1158 // Free Solaris resources related to the OSThread 1159 void os::free_thread(OSThread* osthread) { 1160 assert(osthread != NULL, "os::free_thread but osthread not set"); 1161 1162 // We are told to free resources of the argument thread, 1163 // but we can only really operate on the current thread. 1164 assert(Thread::current()->osthread() == osthread, 1165 "os::free_thread but not current thread"); 1166 1167 // Restore caller's signal mask 1168 sigset_t sigmask = osthread->caller_sigmask(); 1169 pthread_sigmask(SIG_SETMASK, &sigmask, NULL); 1170 1171 delete osthread; 1172 } 1173 1174 void os::pd_start_thread(Thread* thread) { 1175 int status = thr_continue(thread->osthread()->thread_id()); 1176 assert_status(status == 0, status, "thr_continue failed"); 1177 } 1178 1179 1180 intx os::current_thread_id() { 1181 return (intx)thr_self(); 1182 } 1183 1184 static pid_t _initial_pid = 0; 1185 1186 int os::current_process_id() { 1187 return (int)(_initial_pid ? _initial_pid : getpid()); 1188 } 1189 1190 // gethrtime() should be monotonic according to the documentation, 1191 // but some virtualized platforms are known to break this guarantee. 1192 // getTimeNanos() must be guaranteed not to move backwards, so we 1193 // are forced to add a check here. 1194 inline hrtime_t getTimeNanos() { 1195 const hrtime_t now = gethrtime(); 1196 const hrtime_t prev = max_hrtime; 1197 if (now <= prev) { 1198 return prev; // same or retrograde time; 1199 } 1200 const hrtime_t obsv = Atomic::cmpxchg(now, &max_hrtime, prev); 1201 assert(obsv >= prev, "invariant"); // Monotonicity 1202 // If the CAS succeeded then we're done and return "now". 1203 // If the CAS failed and the observed value "obsv" is >= now then 1204 // we should return "obsv". If the CAS failed and now > obsv > prv then 1205 // some other thread raced this thread and installed a new value, in which case 1206 // we could either (a) retry the entire operation, (b) retry trying to install now 1207 // or (c) just return obsv. We use (c). No loop is required although in some cases 1208 // we might discard a higher "now" value in deference to a slightly lower but freshly 1209 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1210 // to (a) or (b) -- and greatly reduces coherence traffic. 1211 // We might also condition (c) on the magnitude of the delta between obsv and now. 1212 // Avoiding excessive CAS operations to hot RW locations is critical. 1213 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1214 return (prev == obsv) ? now : obsv; 1215 } 1216 1217 // Time since start-up in seconds to a fine granularity. 1218 // Used by VMSelfDestructTimer and the MemProfiler. 1219 double os::elapsedTime() { 1220 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1221 } 1222 1223 jlong os::elapsed_counter() { 1224 return (jlong)(getTimeNanos() - first_hrtime); 1225 } 1226 1227 jlong os::elapsed_frequency() { 1228 return hrtime_hz; 1229 } 1230 1231 // Return the real, user, and system times in seconds from an 1232 // arbitrary fixed point in the past. 1233 bool os::getTimesSecs(double* process_real_time, 1234 double* process_user_time, 1235 double* process_system_time) { 1236 struct tms ticks; 1237 clock_t real_ticks = times(&ticks); 1238 1239 if (real_ticks == (clock_t) (-1)) { 1240 return false; 1241 } else { 1242 double ticks_per_second = (double) clock_tics_per_sec; 1243 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1244 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1245 // For consistency return the real time from getTimeNanos() 1246 // converted to seconds. 1247 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1248 1249 return true; 1250 } 1251 } 1252 1253 bool os::supports_vtime() { return true; } 1254 bool os::enable_vtime() { return false; } 1255 bool os::vtime_enabled() { return false; } 1256 1257 double os::elapsedVTime() { 1258 return (double)gethrvtime() / (double)hrtime_hz; 1259 } 1260 1261 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1262 jlong os::javaTimeMillis() { 1263 timeval t; 1264 if (gettimeofday(&t, NULL) == -1) { 1265 fatal("os::javaTimeMillis: gettimeofday (%s)", os::strerror(errno)); 1266 } 1267 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1268 } 1269 1270 // Must return seconds+nanos since Jan 1 1970. This must use the same 1271 // time source as javaTimeMillis and can't use get_nsec_fromepoch as 1272 // we need better than 1ms accuracy 1273 void os::javaTimeSystemUTC(jlong &seconds, jlong &nanos) { 1274 timeval t; 1275 if (gettimeofday(&t, NULL) == -1) { 1276 fatal("os::javaTimeSystemUTC: gettimeofday (%s)", os::strerror(errno)); 1277 } 1278 seconds = jlong(t.tv_sec); 1279 nanos = jlong(t.tv_usec) * 1000; 1280 } 1281 1282 1283 jlong os::javaTimeNanos() { 1284 return (jlong)getTimeNanos(); 1285 } 1286 1287 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1288 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1289 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1290 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1291 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1292 } 1293 1294 char * os::local_time_string(char *buf, size_t buflen) { 1295 struct tm t; 1296 time_t long_time; 1297 time(&long_time); 1298 localtime_r(&long_time, &t); 1299 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1300 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1301 t.tm_hour, t.tm_min, t.tm_sec); 1302 return buf; 1303 } 1304 1305 // Note: os::shutdown() might be called very early during initialization, or 1306 // called from signal handler. Before adding something to os::shutdown(), make 1307 // sure it is async-safe and can handle partially initialized VM. 1308 void os::shutdown() { 1309 1310 // allow PerfMemory to attempt cleanup of any persistent resources 1311 perfMemory_exit(); 1312 1313 // needs to remove object in file system 1314 AttachListener::abort(); 1315 1316 // flush buffered output, finish log files 1317 ostream_abort(); 1318 1319 // Check for abort hook 1320 abort_hook_t abort_hook = Arguments::abort_hook(); 1321 if (abort_hook != NULL) { 1322 abort_hook(); 1323 } 1324 } 1325 1326 // Note: os::abort() might be called very early during initialization, or 1327 // called from signal handler. Before adding something to os::abort(), make 1328 // sure it is async-safe and can handle partially initialized VM. 1329 void os::abort(bool dump_core, void* siginfo, const void* context) { 1330 os::shutdown(); 1331 if (dump_core) { 1332 #ifndef PRODUCT 1333 fdStream out(defaultStream::output_fd()); 1334 out.print_raw("Current thread is "); 1335 char buf[16]; 1336 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1337 out.print_raw_cr(buf); 1338 out.print_raw_cr("Dumping core ..."); 1339 #endif 1340 ::abort(); // dump core (for debugging) 1341 } 1342 1343 ::exit(1); 1344 } 1345 1346 // Die immediately, no exit hook, no abort hook, no cleanup. 1347 void os::die() { 1348 ::abort(); // dump core (for debugging) 1349 } 1350 1351 // DLL functions 1352 1353 const char* os::dll_file_extension() { return ".so"; } 1354 1355 // This must be hard coded because it's the system's temporary 1356 // directory not the java application's temp directory, ala java.io.tmpdir. 1357 const char* os::get_temp_directory() { return "/tmp"; } 1358 1359 // check if addr is inside libjvm.so 1360 bool os::address_is_in_vm(address addr) { 1361 static address libjvm_base_addr; 1362 Dl_info dlinfo; 1363 1364 if (libjvm_base_addr == NULL) { 1365 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1366 libjvm_base_addr = (address)dlinfo.dli_fbase; 1367 } 1368 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1369 } 1370 1371 if (dladdr((void *)addr, &dlinfo) != 0) { 1372 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1373 } 1374 1375 return false; 1376 } 1377 1378 typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1379 static dladdr1_func_type dladdr1_func = NULL; 1380 1381 bool os::dll_address_to_function_name(address addr, char *buf, 1382 int buflen, int * offset, 1383 bool demangle) { 1384 // buf is not optional, but offset is optional 1385 assert(buf != NULL, "sanity check"); 1386 1387 Dl_info dlinfo; 1388 1389 // dladdr1_func was initialized in os::init() 1390 if (dladdr1_func != NULL) { 1391 // yes, we have dladdr1 1392 1393 // Support for dladdr1 is checked at runtime; it may be 1394 // available even if the vm is built on a machine that does 1395 // not have dladdr1 support. Make sure there is a value for 1396 // RTLD_DL_SYMENT. 1397 #ifndef RTLD_DL_SYMENT 1398 #define RTLD_DL_SYMENT 1 1399 #endif 1400 #ifdef _LP64 1401 Elf64_Sym * info; 1402 #else 1403 Elf32_Sym * info; 1404 #endif 1405 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1406 RTLD_DL_SYMENT) != 0) { 1407 // see if we have a matching symbol that covers our address 1408 if (dlinfo.dli_saddr != NULL && 1409 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1410 if (dlinfo.dli_sname != NULL) { 1411 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1412 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1413 } 1414 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1415 return true; 1416 } 1417 } 1418 // no matching symbol so try for just file info 1419 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1420 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1421 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1422 return true; 1423 } 1424 } 1425 } 1426 buf[0] = '\0'; 1427 if (offset != NULL) *offset = -1; 1428 return false; 1429 } 1430 1431 // no, only dladdr is available 1432 if (dladdr((void *)addr, &dlinfo) != 0) { 1433 // see if we have a matching symbol 1434 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1435 if (!(demangle && Decoder::demangle(dlinfo.dli_sname, buf, buflen))) { 1436 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1437 } 1438 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1439 return true; 1440 } 1441 // no matching symbol so try for just file info 1442 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1443 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1444 buf, buflen, offset, dlinfo.dli_fname, demangle)) { 1445 return true; 1446 } 1447 } 1448 } 1449 buf[0] = '\0'; 1450 if (offset != NULL) *offset = -1; 1451 return false; 1452 } 1453 1454 bool os::dll_address_to_library_name(address addr, char* buf, 1455 int buflen, int* offset) { 1456 // buf is not optional, but offset is optional 1457 assert(buf != NULL, "sanity check"); 1458 1459 Dl_info dlinfo; 1460 1461 if (dladdr((void*)addr, &dlinfo) != 0) { 1462 if (dlinfo.dli_fname != NULL) { 1463 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1464 } 1465 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1466 *offset = addr - (address)dlinfo.dli_fbase; 1467 } 1468 return true; 1469 } 1470 1471 buf[0] = '\0'; 1472 if (offset) *offset = -1; 1473 return false; 1474 } 1475 1476 int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1477 Dl_info dli; 1478 // Sanity check? 1479 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1480 dli.dli_fname == NULL) { 1481 return 1; 1482 } 1483 1484 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1485 if (handle == NULL) { 1486 return 1; 1487 } 1488 1489 Link_map *map; 1490 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1491 if (map == NULL) { 1492 dlclose(handle); 1493 return 1; 1494 } 1495 1496 while (map->l_prev != NULL) { 1497 map = map->l_prev; 1498 } 1499 1500 while (map != NULL) { 1501 // Iterate through all map entries and call callback with fields of interest 1502 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1503 dlclose(handle); 1504 return 1; 1505 } 1506 map = map->l_next; 1507 } 1508 1509 dlclose(handle); 1510 return 0; 1511 } 1512 1513 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1514 outputStream * out = (outputStream *) param; 1515 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1516 return 0; 1517 } 1518 1519 void os::print_dll_info(outputStream * st) { 1520 st->print_cr("Dynamic libraries:"); st->flush(); 1521 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1522 st->print_cr("Error: Cannot print dynamic libraries."); 1523 } 1524 } 1525 1526 // Loads .dll/.so and 1527 // in case of error it checks if .dll/.so was built for the 1528 // same architecture as Hotspot is running on 1529 1530 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1531 void * result= ::dlopen(filename, RTLD_LAZY); 1532 if (result != NULL) { 1533 // Successful loading 1534 return result; 1535 } 1536 1537 Elf32_Ehdr elf_head; 1538 1539 // Read system error message into ebuf 1540 // It may or may not be overwritten below 1541 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1542 ebuf[ebuflen-1]='\0'; 1543 int diag_msg_max_length=ebuflen-strlen(ebuf); 1544 char* diag_msg_buf=ebuf+strlen(ebuf); 1545 1546 if (diag_msg_max_length==0) { 1547 // No more space in ebuf for additional diagnostics message 1548 return NULL; 1549 } 1550 1551 1552 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1553 1554 if (file_descriptor < 0) { 1555 // Can't open library, report dlerror() message 1556 return NULL; 1557 } 1558 1559 bool failed_to_read_elf_head= 1560 (sizeof(elf_head)!= 1561 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1562 1563 ::close(file_descriptor); 1564 if (failed_to_read_elf_head) { 1565 // file i/o error - report dlerror() msg 1566 return NULL; 1567 } 1568 1569 typedef struct { 1570 Elf32_Half code; // Actual value as defined in elf.h 1571 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1572 unsigned char elf_class; // 32 or 64 bit 1573 unsigned char endianess; // MSB or LSB 1574 char* name; // String representation 1575 } arch_t; 1576 1577 static const arch_t arch_array[]={ 1578 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1579 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1580 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1581 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1582 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1583 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1584 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1585 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1586 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1587 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1588 }; 1589 1590 #if (defined IA32) 1591 static Elf32_Half running_arch_code=EM_386; 1592 #elif (defined AMD64) 1593 static Elf32_Half running_arch_code=EM_X86_64; 1594 #elif (defined IA64) 1595 static Elf32_Half running_arch_code=EM_IA_64; 1596 #elif (defined __sparc) && (defined _LP64) 1597 static Elf32_Half running_arch_code=EM_SPARCV9; 1598 #elif (defined __sparc) && (!defined _LP64) 1599 static Elf32_Half running_arch_code=EM_SPARC; 1600 #elif (defined __powerpc64__) 1601 static Elf32_Half running_arch_code=EM_PPC64; 1602 #elif (defined __powerpc__) 1603 static Elf32_Half running_arch_code=EM_PPC; 1604 #elif (defined ARM) 1605 static Elf32_Half running_arch_code=EM_ARM; 1606 #else 1607 #error Method os::dll_load requires that one of following is defined:\ 1608 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1609 #endif 1610 1611 // Identify compatability class for VM's architecture and library's architecture 1612 // Obtain string descriptions for architectures 1613 1614 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1615 int running_arch_index=-1; 1616 1617 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1618 if (running_arch_code == arch_array[i].code) { 1619 running_arch_index = i; 1620 } 1621 if (lib_arch.code == arch_array[i].code) { 1622 lib_arch.compat_class = arch_array[i].compat_class; 1623 lib_arch.name = arch_array[i].name; 1624 } 1625 } 1626 1627 assert(running_arch_index != -1, 1628 "Didn't find running architecture code (running_arch_code) in arch_array"); 1629 if (running_arch_index == -1) { 1630 // Even though running architecture detection failed 1631 // we may still continue with reporting dlerror() message 1632 return NULL; 1633 } 1634 1635 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1636 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1637 return NULL; 1638 } 1639 1640 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1641 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1642 return NULL; 1643 } 1644 1645 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1646 if (lib_arch.name!=NULL) { 1647 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1648 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1649 lib_arch.name, arch_array[running_arch_index].name); 1650 } else { 1651 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1652 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1653 lib_arch.code, 1654 arch_array[running_arch_index].name); 1655 } 1656 } 1657 1658 return NULL; 1659 } 1660 1661 void* os::dll_lookup(void* handle, const char* name) { 1662 return dlsym(handle, name); 1663 } 1664 1665 void* os::get_default_process_handle() { 1666 return (void*)::dlopen(NULL, RTLD_LAZY); 1667 } 1668 1669 static inline time_t get_mtime(const char* filename) { 1670 struct stat st; 1671 int ret = os::stat(filename, &st); 1672 assert(ret == 0, "failed to stat() file '%s': %s", filename, strerror(errno)); 1673 return st.st_mtime; 1674 } 1675 1676 int os::compare_file_modified_times(const char* file1, const char* file2) { 1677 time_t t1 = get_mtime(file1); 1678 time_t t2 = get_mtime(file2); 1679 return t1 - t2; 1680 } 1681 1682 static bool _print_ascii_file(const char* filename, outputStream* st) { 1683 int fd = ::open(filename, O_RDONLY); 1684 if (fd == -1) { 1685 return false; 1686 } 1687 1688 char buf[32]; 1689 int bytes; 1690 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1691 st->print_raw(buf, bytes); 1692 } 1693 1694 ::close(fd); 1695 1696 return true; 1697 } 1698 1699 void os::print_os_info_brief(outputStream* st) { 1700 os::Solaris::print_distro_info(st); 1701 1702 os::Posix::print_uname_info(st); 1703 1704 os::Solaris::print_libversion_info(st); 1705 } 1706 1707 void os::print_os_info(outputStream* st) { 1708 st->print("OS:"); 1709 1710 os::Solaris::print_distro_info(st); 1711 1712 os::Posix::print_uname_info(st); 1713 1714 os::Solaris::print_libversion_info(st); 1715 1716 os::Posix::print_rlimit_info(st); 1717 1718 os::Posix::print_load_average(st); 1719 } 1720 1721 void os::Solaris::print_distro_info(outputStream* st) { 1722 if (!_print_ascii_file("/etc/release", st)) { 1723 st->print("Solaris"); 1724 } 1725 st->cr(); 1726 } 1727 1728 void os::get_summary_os_info(char* buf, size_t buflen) { 1729 strncpy(buf, "Solaris", buflen); // default to plain solaris 1730 FILE* fp = fopen("/etc/release", "r"); 1731 if (fp != NULL) { 1732 char tmp[256]; 1733 // Only get the first line and chop out everything but the os name. 1734 if (fgets(tmp, sizeof(tmp), fp)) { 1735 char* ptr = tmp; 1736 // skip past whitespace characters 1737 while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++; 1738 if (*ptr != '\0') { 1739 char* nl = strchr(ptr, '\n'); 1740 if (nl != NULL) *nl = '\0'; 1741 strncpy(buf, ptr, buflen); 1742 } 1743 } 1744 fclose(fp); 1745 } 1746 } 1747 1748 void os::Solaris::print_libversion_info(outputStream* st) { 1749 st->print(" (T2 libthread)"); 1750 st->cr(); 1751 } 1752 1753 static bool check_addr0(outputStream* st) { 1754 jboolean status = false; 1755 const int read_chunk = 200; 1756 int ret = 0; 1757 int nmap = 0; 1758 int fd = ::open("/proc/self/map",O_RDONLY); 1759 if (fd >= 0) { 1760 prmap_t *p = NULL; 1761 char *mbuff = (char *) calloc(read_chunk, sizeof(prmap_t)); 1762 if (NULL == mbuff) { 1763 ::close(fd); 1764 return status; 1765 } 1766 while ((ret = ::read(fd, mbuff, read_chunk*sizeof(prmap_t))) > 0) { 1767 //check if read() has not read partial data 1768 if( 0 != ret % sizeof(prmap_t)){ 1769 break; 1770 } 1771 nmap = ret / sizeof(prmap_t); 1772 p = (prmap_t *)mbuff; 1773 for(int i = 0; i < nmap; i++){ 1774 if (p->pr_vaddr == 0x0) { 1775 st->print("Warning: Address: " PTR_FORMAT ", Size: " SIZE_FORMAT "K, ",p->pr_vaddr, p->pr_size/1024); 1776 st->print("Mapped file: %s, ", p->pr_mapname[0] == '\0' ? "None" : p->pr_mapname); 1777 st->print("Access: "); 1778 st->print("%s",(p->pr_mflags & MA_READ) ? "r" : "-"); 1779 st->print("%s",(p->pr_mflags & MA_WRITE) ? "w" : "-"); 1780 st->print("%s",(p->pr_mflags & MA_EXEC) ? "x" : "-"); 1781 st->cr(); 1782 status = true; 1783 } 1784 p++; 1785 } 1786 } 1787 free(mbuff); 1788 ::close(fd); 1789 } 1790 return status; 1791 } 1792 1793 void os::get_summary_cpu_info(char* buf, size_t buflen) { 1794 // Get MHz with system call. We don't seem to already have this. 1795 processor_info_t stats; 1796 processorid_t id = getcpuid(); 1797 int clock = 0; 1798 if (processor_info(id, &stats) != -1) { 1799 clock = stats.pi_clock; // pi_processor_type isn't more informative than below 1800 } 1801 #ifdef AMD64 1802 snprintf(buf, buflen, "x86 64 bit %d MHz", clock); 1803 #else 1804 // must be sparc 1805 snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock); 1806 #endif 1807 } 1808 1809 void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) { 1810 // Nothing to do for now. 1811 } 1812 1813 void os::print_memory_info(outputStream* st) { 1814 st->print("Memory:"); 1815 st->print(" %dk page", os::vm_page_size()>>10); 1816 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 1817 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 1818 st->cr(); 1819 (void) check_addr0(st); 1820 } 1821 1822 // Moved from whole group, because we need them here for diagnostic 1823 // prints. 1824 static int Maxsignum = 0; 1825 static int *ourSigFlags = NULL; 1826 1827 int os::Solaris::get_our_sigflags(int sig) { 1828 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1829 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1830 return ourSigFlags[sig]; 1831 } 1832 1833 void os::Solaris::set_our_sigflags(int sig, int flags) { 1834 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 1835 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 1836 ourSigFlags[sig] = flags; 1837 } 1838 1839 1840 static const char* get_signal_handler_name(address handler, 1841 char* buf, int buflen) { 1842 int offset; 1843 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 1844 if (found) { 1845 // skip directory names 1846 const char *p1, *p2; 1847 p1 = buf; 1848 size_t len = strlen(os::file_separator()); 1849 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 1850 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 1851 } else { 1852 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 1853 } 1854 return buf; 1855 } 1856 1857 static void print_signal_handler(outputStream* st, int sig, 1858 char* buf, size_t buflen) { 1859 struct sigaction sa; 1860 1861 sigaction(sig, NULL, &sa); 1862 1863 st->print("%s: ", os::exception_name(sig, buf, buflen)); 1864 1865 address handler = (sa.sa_flags & SA_SIGINFO) 1866 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 1867 : CAST_FROM_FN_PTR(address, sa.sa_handler); 1868 1869 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 1870 st->print("SIG_DFL"); 1871 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 1872 st->print("SIG_IGN"); 1873 } else { 1874 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 1875 } 1876 1877 st->print(", sa_mask[0]="); 1878 os::Posix::print_signal_set_short(st, &sa.sa_mask); 1879 1880 address rh = VMError::get_resetted_sighandler(sig); 1881 // May be, handler was resetted by VMError? 1882 if (rh != NULL) { 1883 handler = rh; 1884 sa.sa_flags = VMError::get_resetted_sigflags(sig); 1885 } 1886 1887 st->print(", sa_flags="); 1888 os::Posix::print_sa_flags(st, sa.sa_flags); 1889 1890 // Check: is it our handler? 1891 if (handler == CAST_FROM_FN_PTR(address, signalHandler)) { 1892 // It is our signal handler 1893 // check for flags 1894 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 1895 st->print( 1896 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 1897 os::Solaris::get_our_sigflags(sig)); 1898 } 1899 } 1900 st->cr(); 1901 } 1902 1903 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 1904 st->print_cr("Signal Handlers:"); 1905 print_signal_handler(st, SIGSEGV, buf, buflen); 1906 print_signal_handler(st, SIGBUS , buf, buflen); 1907 print_signal_handler(st, SIGFPE , buf, buflen); 1908 print_signal_handler(st, SIGPIPE, buf, buflen); 1909 print_signal_handler(st, SIGXFSZ, buf, buflen); 1910 print_signal_handler(st, SIGILL , buf, buflen); 1911 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 1912 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 1913 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 1914 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 1915 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 1916 } 1917 1918 static char saved_jvm_path[MAXPATHLEN] = { 0 }; 1919 1920 // Find the full path to the current module, libjvm.so 1921 void os::jvm_path(char *buf, jint buflen) { 1922 // Error checking. 1923 if (buflen < MAXPATHLEN) { 1924 assert(false, "must use a large-enough buffer"); 1925 buf[0] = '\0'; 1926 return; 1927 } 1928 // Lazy resolve the path to current module. 1929 if (saved_jvm_path[0] != 0) { 1930 strcpy(buf, saved_jvm_path); 1931 return; 1932 } 1933 1934 Dl_info dlinfo; 1935 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 1936 assert(ret != 0, "cannot locate libjvm"); 1937 if (ret != 0 && dlinfo.dli_fname != NULL) { 1938 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) { 1939 return; 1940 } 1941 } else { 1942 buf[0] = '\0'; 1943 return; 1944 } 1945 1946 if (Arguments::sun_java_launcher_is_altjvm()) { 1947 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 1948 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 1949 // If "/jre/lib/" appears at the right place in the string, then 1950 // assume we are installed in a JDK and we're done. Otherwise, check 1951 // for a JAVA_HOME environment variable and fix up the path so it 1952 // looks like libjvm.so is installed there (append a fake suffix 1953 // hotspot/libjvm.so). 1954 const char *p = buf + strlen(buf) - 1; 1955 for (int count = 0; p > buf && count < 5; ++count) { 1956 for (--p; p > buf && *p != '/'; --p) 1957 /* empty */ ; 1958 } 1959 1960 if (strncmp(p, "/jre/lib/", 9) != 0) { 1961 // Look for JAVA_HOME in the environment. 1962 char* java_home_var = ::getenv("JAVA_HOME"); 1963 if (java_home_var != NULL && java_home_var[0] != 0) { 1964 char* jrelib_p; 1965 int len; 1966 1967 // Check the current module name "libjvm.so". 1968 p = strrchr(buf, '/'); 1969 assert(strstr(p, "/libjvm") == p, "invalid library name"); 1970 1971 if (os::Posix::realpath(java_home_var, buf, buflen) == NULL) { 1972 return; 1973 } 1974 // determine if this is a legacy image or modules image 1975 // modules image doesn't have "jre" subdirectory 1976 len = strlen(buf); 1977 assert(len < buflen, "Ran out of buffer space"); 1978 jrelib_p = buf + len; 1979 snprintf(jrelib_p, buflen-len, "/jre/lib"); 1980 if (0 != access(buf, F_OK)) { 1981 snprintf(jrelib_p, buflen-len, "/lib"); 1982 } 1983 1984 if (0 == access(buf, F_OK)) { 1985 // Use current module name "libjvm.so" 1986 len = strlen(buf); 1987 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 1988 } else { 1989 // Go back to path of .so 1990 if (os::Posix::realpath((char *)dlinfo.dli_fname, buf, buflen) == NULL) { 1991 return; 1992 } 1993 } 1994 } 1995 } 1996 } 1997 1998 strncpy(saved_jvm_path, buf, MAXPATHLEN); 1999 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2000 } 2001 2002 2003 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2004 // no prefix required, not even "_" 2005 } 2006 2007 2008 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2009 // no suffix required 2010 } 2011 2012 // sun.misc.Signal 2013 2014 extern "C" { 2015 static void UserHandler(int sig, void *siginfo, void *context) { 2016 // Ctrl-C is pressed during error reporting, likely because the error 2017 // handler fails to abort. Let VM die immediately. 2018 if (sig == SIGINT && VMError::is_error_reported()) { 2019 os::die(); 2020 } 2021 2022 os::signal_notify(sig); 2023 // We do not need to reinstate the signal handler each time... 2024 } 2025 } 2026 2027 void* os::user_handler() { 2028 return CAST_FROM_FN_PTR(void*, UserHandler); 2029 } 2030 2031 static struct timespec create_semaphore_timespec(unsigned int sec, int nsec) { 2032 struct timespec ts; 2033 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2034 2035 return ts; 2036 } 2037 2038 extern "C" { 2039 typedef void (*sa_handler_t)(int); 2040 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2041 } 2042 2043 void* os::signal(int signal_number, void* handler) { 2044 struct sigaction sigAct, oldSigAct; 2045 sigfillset(&(sigAct.sa_mask)); 2046 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2047 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2048 2049 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2050 // -1 means registration failed 2051 return (void *)-1; 2052 } 2053 2054 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2055 } 2056 2057 void os::signal_raise(int signal_number) { 2058 raise(signal_number); 2059 } 2060 2061 // The following code is moved from os.cpp for making this 2062 // code platform specific, which it is by its very nature. 2063 2064 // a counter for each possible signal value 2065 static int Sigexit = 0; 2066 static jint *pending_signals = NULL; 2067 static int *preinstalled_sigs = NULL; 2068 static struct sigaction *chainedsigactions = NULL; 2069 static Semaphore* sig_sem = NULL; 2070 2071 int os::sigexitnum_pd() { 2072 assert(Sigexit > 0, "signal memory not yet initialized"); 2073 return Sigexit; 2074 } 2075 2076 void os::Solaris::init_signal_mem() { 2077 // Initialize signal structures 2078 Maxsignum = SIGRTMAX; 2079 Sigexit = Maxsignum+1; 2080 assert(Maxsignum >0, "Unable to obtain max signal number"); 2081 2082 // Initialize signal structures 2083 // pending_signals has one int per signal 2084 // The additional signal is for SIGEXIT - exit signal to signal_thread 2085 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2086 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2087 2088 if (UseSignalChaining) { 2089 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2090 * (Maxsignum + 1), mtInternal); 2091 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2092 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2093 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2094 } 2095 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2096 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2097 } 2098 2099 static void jdk_misc_signal_init() { 2100 // Initialize signal semaphore 2101 sig_sem = new Semaphore(); 2102 } 2103 2104 void os::signal_notify(int sig) { 2105 if (sig_sem != NULL) { 2106 Atomic::inc(&pending_signals[sig]); 2107 sig_sem->signal(); 2108 } else { 2109 // Signal thread is not created with ReduceSignalUsage and jdk_misc_signal_init 2110 // initialization isn't called. 2111 assert(ReduceSignalUsage, "signal semaphore should be created"); 2112 } 2113 } 2114 2115 static int check_pending_signals() { 2116 int ret; 2117 while (true) { 2118 for (int i = 0; i < Sigexit + 1; i++) { 2119 jint n = pending_signals[i]; 2120 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2121 return i; 2122 } 2123 } 2124 JavaThread *thread = JavaThread::current(); 2125 ThreadBlockInVM tbivm(thread); 2126 2127 bool threadIsSuspended; 2128 do { 2129 thread->set_suspend_equivalent(); 2130 sig_sem->wait(); 2131 2132 // were we externally suspended while we were waiting? 2133 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2134 if (threadIsSuspended) { 2135 // The semaphore has been incremented, but while we were waiting 2136 // another thread suspended us. We don't want to continue running 2137 // while suspended because that would surprise the thread that 2138 // suspended us. 2139 sig_sem->signal(); 2140 2141 thread->java_suspend_self(); 2142 } 2143 } while (threadIsSuspended); 2144 } 2145 } 2146 2147 int os::signal_wait() { 2148 return check_pending_signals(); 2149 } 2150 2151 //////////////////////////////////////////////////////////////////////////////// 2152 // Virtual Memory 2153 2154 static int page_size = -1; 2155 2156 int os::vm_page_size() { 2157 assert(page_size != -1, "must call os::init"); 2158 return page_size; 2159 } 2160 2161 // Solaris allocates memory by pages. 2162 int os::vm_allocation_granularity() { 2163 assert(page_size != -1, "must call os::init"); 2164 return page_size; 2165 } 2166 2167 static bool recoverable_mmap_error(int err) { 2168 // See if the error is one we can let the caller handle. This 2169 // list of errno values comes from the Solaris mmap(2) man page. 2170 switch (err) { 2171 case EBADF: 2172 case EINVAL: 2173 case ENOTSUP: 2174 // let the caller deal with these errors 2175 return true; 2176 2177 default: 2178 // Any remaining errors on this OS can cause our reserved mapping 2179 // to be lost. That can cause confusion where different data 2180 // structures think they have the same memory mapped. The worst 2181 // scenario is if both the VM and a library think they have the 2182 // same memory mapped. 2183 return false; 2184 } 2185 } 2186 2187 static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2188 int err) { 2189 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2190 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2191 os::strerror(err), err); 2192 } 2193 2194 static void warn_fail_commit_memory(char* addr, size_t bytes, 2195 size_t alignment_hint, bool exec, 2196 int err) { 2197 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2198 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2199 alignment_hint, exec, os::strerror(err), err); 2200 } 2201 2202 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2203 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2204 size_t size = bytes; 2205 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2206 if (res != NULL) { 2207 if (UseNUMAInterleaving) { 2208 numa_make_global(addr, bytes); 2209 } 2210 return 0; 2211 } 2212 2213 int err = errno; // save errno from mmap() call in mmap_chunk() 2214 2215 if (!recoverable_mmap_error(err)) { 2216 warn_fail_commit_memory(addr, bytes, exec, err); 2217 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2218 } 2219 2220 return err; 2221 } 2222 2223 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2224 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2225 } 2226 2227 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2228 const char* mesg) { 2229 assert(mesg != NULL, "mesg must be specified"); 2230 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2231 if (err != 0) { 2232 // the caller wants all commit errors to exit with the specified mesg: 2233 warn_fail_commit_memory(addr, bytes, exec, err); 2234 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2235 } 2236 } 2237 2238 size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2239 assert(is_aligned(alignment, (size_t) vm_page_size()), 2240 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2241 alignment, (size_t) vm_page_size()); 2242 2243 for (int i = 0; _page_sizes[i] != 0; i++) { 2244 if (is_aligned(alignment, _page_sizes[i])) { 2245 return _page_sizes[i]; 2246 } 2247 } 2248 2249 return (size_t) vm_page_size(); 2250 } 2251 2252 int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2253 size_t alignment_hint, bool exec) { 2254 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2255 if (err == 0 && UseLargePages && alignment_hint > 0) { 2256 assert(is_aligned(bytes, alignment_hint), 2257 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint); 2258 2259 // The syscall memcntl requires an exact page size (see man memcntl for details). 2260 size_t page_size = page_size_for_alignment(alignment_hint); 2261 if (page_size > (size_t) vm_page_size()) { 2262 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2263 } 2264 } 2265 return err; 2266 } 2267 2268 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2269 bool exec) { 2270 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2271 } 2272 2273 void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2274 size_t alignment_hint, bool exec, 2275 const char* mesg) { 2276 assert(mesg != NULL, "mesg must be specified"); 2277 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2278 if (err != 0) { 2279 // the caller wants all commit errors to exit with the specified mesg: 2280 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2281 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "%s", mesg); 2282 } 2283 } 2284 2285 // Uncommit the pages in a specified region. 2286 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2287 if (madvise(addr, bytes, MADV_FREE) < 0) { 2288 debug_only(warning("MADV_FREE failed.")); 2289 return; 2290 } 2291 } 2292 2293 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2294 return os::commit_memory(addr, size, !ExecMem); 2295 } 2296 2297 bool os::remove_stack_guard_pages(char* addr, size_t size) { 2298 return os::uncommit_memory(addr, size); 2299 } 2300 2301 // Change the page size in a given range. 2302 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2303 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2304 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2305 if (UseLargePages) { 2306 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2307 if (page_size > (size_t) vm_page_size()) { 2308 Solaris::setup_large_pages(addr, bytes, page_size); 2309 } 2310 } 2311 } 2312 2313 // Tell the OS to make the range local to the first-touching LWP 2314 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2315 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2316 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2317 debug_only(warning("MADV_ACCESS_LWP failed.")); 2318 } 2319 } 2320 2321 // Tell the OS that this range would be accessed from different LWPs. 2322 void os::numa_make_global(char *addr, size_t bytes) { 2323 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2324 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2325 debug_only(warning("MADV_ACCESS_MANY failed.")); 2326 } 2327 } 2328 2329 // Get the number of the locality groups. 2330 size_t os::numa_get_groups_num() { 2331 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2332 return n != -1 ? n : 1; 2333 } 2334 2335 // Get a list of leaf locality groups. A leaf lgroup is group that 2336 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2337 // board. An LWP is assigned to one of these groups upon creation. 2338 size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2339 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2340 ids[0] = 0; 2341 return 1; 2342 } 2343 int result_size = 0, top = 1, bottom = 0, cur = 0; 2344 for (int k = 0; k < size; k++) { 2345 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2346 (Solaris::lgrp_id_t*)&ids[top], size - top); 2347 if (r == -1) { 2348 ids[0] = 0; 2349 return 1; 2350 } 2351 if (!r) { 2352 // That's a leaf node. 2353 assert(bottom <= cur, "Sanity check"); 2354 // Check if the node has memory 2355 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2356 NULL, 0, LGRP_RSRC_MEM) > 0) { 2357 ids[bottom++] = ids[cur]; 2358 } 2359 } 2360 top += r; 2361 cur++; 2362 } 2363 if (bottom == 0) { 2364 // Handle a situation, when the OS reports no memory available. 2365 // Assume UMA architecture. 2366 ids[0] = 0; 2367 return 1; 2368 } 2369 return bottom; 2370 } 2371 2372 // Detect the topology change. Typically happens during CPU plugging-unplugging. 2373 bool os::numa_topology_changed() { 2374 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2375 if (is_stale != -1 && is_stale) { 2376 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2377 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2378 assert(c != 0, "Failure to initialize LGRP API"); 2379 Solaris::set_lgrp_cookie(c); 2380 return true; 2381 } 2382 return false; 2383 } 2384 2385 // Get the group id of the current LWP. 2386 int os::numa_get_group_id() { 2387 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2388 if (lgrp_id == -1) { 2389 return 0; 2390 } 2391 const int size = os::numa_get_groups_num(); 2392 int *ids = (int*)alloca(size * sizeof(int)); 2393 2394 // Get the ids of all lgroups with memory; r is the count. 2395 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2396 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2397 if (r <= 0) { 2398 return 0; 2399 } 2400 return ids[os::random() % r]; 2401 } 2402 2403 // Request information about the page. 2404 bool os::get_page_info(char *start, page_info* info) { 2405 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2406 uint64_t addr = (uintptr_t)start; 2407 uint64_t outdata[2]; 2408 uint_t validity = 0; 2409 2410 if (meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2411 return false; 2412 } 2413 2414 info->size = 0; 2415 info->lgrp_id = -1; 2416 2417 if ((validity & 1) != 0) { 2418 if ((validity & 2) != 0) { 2419 info->lgrp_id = outdata[0]; 2420 } 2421 if ((validity & 4) != 0) { 2422 info->size = outdata[1]; 2423 } 2424 return true; 2425 } 2426 return false; 2427 } 2428 2429 // Scan the pages from start to end until a page different than 2430 // the one described in the info parameter is encountered. 2431 char *os::scan_pages(char *start, char* end, page_info* page_expected, 2432 page_info* page_found) { 2433 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2434 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2435 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2436 uint_t validity[MAX_MEMINFO_CNT]; 2437 2438 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2439 uint64_t p = (uint64_t)start; 2440 while (p < (uint64_t)end) { 2441 addrs[0] = p; 2442 size_t addrs_count = 1; 2443 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2444 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2445 addrs_count++; 2446 } 2447 2448 if (meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2449 return NULL; 2450 } 2451 2452 size_t i = 0; 2453 for (; i < addrs_count; i++) { 2454 if ((validity[i] & 1) != 0) { 2455 if ((validity[i] & 4) != 0) { 2456 if (outdata[types * i + 1] != page_expected->size) { 2457 break; 2458 } 2459 } else if (page_expected->size != 0) { 2460 break; 2461 } 2462 2463 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2464 if (outdata[types * i] != page_expected->lgrp_id) { 2465 break; 2466 } 2467 } 2468 } else { 2469 return NULL; 2470 } 2471 } 2472 2473 if (i < addrs_count) { 2474 if ((validity[i] & 2) != 0) { 2475 page_found->lgrp_id = outdata[types * i]; 2476 } else { 2477 page_found->lgrp_id = -1; 2478 } 2479 if ((validity[i] & 4) != 0) { 2480 page_found->size = outdata[types * i + 1]; 2481 } else { 2482 page_found->size = 0; 2483 } 2484 return (char*)addrs[i]; 2485 } 2486 2487 p = addrs[addrs_count - 1] + page_size; 2488 } 2489 return end; 2490 } 2491 2492 bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2493 size_t size = bytes; 2494 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2495 // uncommitted page. Otherwise, the read/write might succeed if we 2496 // have enough swap space to back the physical page. 2497 return 2498 NULL != Solaris::mmap_chunk(addr, size, 2499 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2500 PROT_NONE); 2501 } 2502 2503 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2504 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2505 2506 if (b == MAP_FAILED) { 2507 return NULL; 2508 } 2509 return b; 2510 } 2511 2512 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2513 size_t alignment_hint, bool fixed) { 2514 char* addr = requested_addr; 2515 int flags = MAP_PRIVATE | MAP_NORESERVE; 2516 2517 assert(!(fixed && (alignment_hint > 0)), 2518 "alignment hint meaningless with fixed mmap"); 2519 2520 if (fixed) { 2521 flags |= MAP_FIXED; 2522 } else if (alignment_hint > (size_t) vm_page_size()) { 2523 flags |= MAP_ALIGN; 2524 addr = (char*) alignment_hint; 2525 } 2526 2527 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2528 // uncommitted page. Otherwise, the read/write might succeed if we 2529 // have enough swap space to back the physical page. 2530 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2531 } 2532 2533 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2534 size_t alignment_hint) { 2535 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2536 (requested_addr != NULL)); 2537 2538 guarantee(requested_addr == NULL || requested_addr == addr, 2539 "OS failed to return requested mmap address."); 2540 return addr; 2541 } 2542 2543 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr, int file_desc) { 2544 assert(file_desc >= 0, "file_desc is not valid"); 2545 char* result = pd_attempt_reserve_memory_at(bytes, requested_addr); 2546 if (result != NULL) { 2547 if (replace_existing_mapping_with_file_mapping(result, bytes, file_desc) == NULL) { 2548 vm_exit_during_initialization(err_msg("Error in mapping Java heap at the given filesystem directory")); 2549 } 2550 } 2551 return result; 2552 } 2553 2554 // Reserve memory at an arbitrary address, only if that area is 2555 // available (and not reserved for something else). 2556 2557 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2558 const int max_tries = 10; 2559 char* base[max_tries]; 2560 size_t size[max_tries]; 2561 2562 // Solaris adds a gap between mmap'ed regions. The size of the gap 2563 // is dependent on the requested size and the MMU. Our initial gap 2564 // value here is just a guess and will be corrected later. 2565 bool had_top_overlap = false; 2566 bool have_adjusted_gap = false; 2567 size_t gap = 0x400000; 2568 2569 // Assert only that the size is a multiple of the page size, since 2570 // that's all that mmap requires, and since that's all we really know 2571 // about at this low abstraction level. If we need higher alignment, 2572 // we can either pass an alignment to this method or verify alignment 2573 // in one of the methods further up the call chain. See bug 5044738. 2574 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2575 2576 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2577 // Give it a try, if the kernel honors the hint we can return immediately. 2578 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2579 2580 volatile int err = errno; 2581 if (addr == requested_addr) { 2582 return addr; 2583 } else if (addr != NULL) { 2584 pd_unmap_memory(addr, bytes); 2585 } 2586 2587 if (log_is_enabled(Warning, os)) { 2588 char buf[256]; 2589 buf[0] = '\0'; 2590 if (addr == NULL) { 2591 jio_snprintf(buf, sizeof(buf), ": %s", os::strerror(err)); 2592 } 2593 log_info(os)("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2594 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2595 "%s", bytes, requested_addr, addr, buf); 2596 } 2597 2598 // Address hint method didn't work. Fall back to the old method. 2599 // In theory, once SNV becomes our oldest supported platform, this 2600 // code will no longer be needed. 2601 // 2602 // Repeatedly allocate blocks until the block is allocated at the 2603 // right spot. Give up after max_tries. 2604 int i; 2605 for (i = 0; i < max_tries; ++i) { 2606 base[i] = reserve_memory(bytes); 2607 2608 if (base[i] != NULL) { 2609 // Is this the block we wanted? 2610 if (base[i] == requested_addr) { 2611 size[i] = bytes; 2612 break; 2613 } 2614 2615 // check that the gap value is right 2616 if (had_top_overlap && !have_adjusted_gap) { 2617 size_t actual_gap = base[i-1] - base[i] - bytes; 2618 if (gap != actual_gap) { 2619 // adjust the gap value and retry the last 2 allocations 2620 assert(i > 0, "gap adjustment code problem"); 2621 have_adjusted_gap = true; // adjust the gap only once, just in case 2622 gap = actual_gap; 2623 log_info(os)("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2624 unmap_memory(base[i], bytes); 2625 unmap_memory(base[i-1], size[i-1]); 2626 i-=2; 2627 continue; 2628 } 2629 } 2630 2631 // Does this overlap the block we wanted? Give back the overlapped 2632 // parts and try again. 2633 // 2634 // There is still a bug in this code: if top_overlap == bytes, 2635 // the overlap is offset from requested region by the value of gap. 2636 // In this case giving back the overlapped part will not work, 2637 // because we'll give back the entire block at base[i] and 2638 // therefore the subsequent allocation will not generate a new gap. 2639 // This could be fixed with a new algorithm that used larger 2640 // or variable size chunks to find the requested region - 2641 // but such a change would introduce additional complications. 2642 // It's rare enough that the planets align for this bug, 2643 // so we'll just wait for a fix for 6204603/5003415 which 2644 // will provide a mmap flag to allow us to avoid this business. 2645 2646 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2647 if (top_overlap >= 0 && top_overlap < bytes) { 2648 had_top_overlap = true; 2649 unmap_memory(base[i], top_overlap); 2650 base[i] += top_overlap; 2651 size[i] = bytes - top_overlap; 2652 } else { 2653 size_t bottom_overlap = base[i] + bytes - requested_addr; 2654 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2655 if (bottom_overlap == 0) { 2656 log_info(os)("attempt_reserve_memory_at: possible alignment bug"); 2657 } 2658 unmap_memory(requested_addr, bottom_overlap); 2659 size[i] = bytes - bottom_overlap; 2660 } else { 2661 size[i] = bytes; 2662 } 2663 } 2664 } 2665 } 2666 2667 // Give back the unused reserved pieces. 2668 2669 for (int j = 0; j < i; ++j) { 2670 if (base[j] != NULL) { 2671 unmap_memory(base[j], size[j]); 2672 } 2673 } 2674 2675 return (i < max_tries) ? requested_addr : NULL; 2676 } 2677 2678 bool os::pd_release_memory(char* addr, size_t bytes) { 2679 size_t size = bytes; 2680 return munmap(addr, size) == 0; 2681 } 2682 2683 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2684 assert(addr == (char*)align_down((uintptr_t)addr, os::vm_page_size()), 2685 "addr must be page aligned"); 2686 int retVal = mprotect(addr, bytes, prot); 2687 return retVal == 0; 2688 } 2689 2690 // Protect memory (Used to pass readonly pages through 2691 // JNI GetArray<type>Elements with empty arrays.) 2692 // Also, used for serialization page and for compressed oops null pointer 2693 // checking. 2694 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2695 bool is_committed) { 2696 unsigned int p = 0; 2697 switch (prot) { 2698 case MEM_PROT_NONE: p = PROT_NONE; break; 2699 case MEM_PROT_READ: p = PROT_READ; break; 2700 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2701 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2702 default: 2703 ShouldNotReachHere(); 2704 } 2705 // is_committed is unused. 2706 return solaris_mprotect(addr, bytes, p); 2707 } 2708 2709 // guard_memory and unguard_memory only happens within stack guard pages. 2710 // Since ISM pertains only to the heap, guard and unguard memory should not 2711 /// happen with an ISM region. 2712 bool os::guard_memory(char* addr, size_t bytes) { 2713 return solaris_mprotect(addr, bytes, PROT_NONE); 2714 } 2715 2716 bool os::unguard_memory(char* addr, size_t bytes) { 2717 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 2718 } 2719 2720 // Large page support 2721 static size_t _large_page_size = 0; 2722 2723 // Insertion sort for small arrays (descending order). 2724 static void insertion_sort_descending(size_t* array, int len) { 2725 for (int i = 0; i < len; i++) { 2726 size_t val = array[i]; 2727 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 2728 size_t tmp = array[key]; 2729 array[key] = array[key - 1]; 2730 array[key - 1] = tmp; 2731 } 2732 } 2733 } 2734 2735 bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 2736 const unsigned int usable_count = VM_Version::page_size_count(); 2737 if (usable_count == 1) { 2738 return false; 2739 } 2740 2741 // Find the right getpagesizes interface. When solaris 11 is the minimum 2742 // build platform, getpagesizes() (without the '2') can be called directly. 2743 typedef int (*gps_t)(size_t[], int); 2744 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 2745 if (gps_func == NULL) { 2746 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 2747 if (gps_func == NULL) { 2748 if (warn) { 2749 warning("MPSS is not supported by the operating system."); 2750 } 2751 return false; 2752 } 2753 } 2754 2755 // Fill the array of page sizes. 2756 int n = (*gps_func)(_page_sizes, page_sizes_max); 2757 assert(n > 0, "Solaris bug?"); 2758 2759 if (n == page_sizes_max) { 2760 // Add a sentinel value (necessary only if the array was completely filled 2761 // since it is static (zeroed at initialization)). 2762 _page_sizes[--n] = 0; 2763 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 2764 } 2765 assert(_page_sizes[n] == 0, "missing sentinel"); 2766 trace_page_sizes("available page sizes", _page_sizes, n); 2767 2768 if (n == 1) return false; // Only one page size available. 2769 2770 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 2771 // select up to usable_count elements. First sort the array, find the first 2772 // acceptable value, then copy the usable sizes to the top of the array and 2773 // trim the rest. Make sure to include the default page size :-). 2774 // 2775 // A better policy could get rid of the 4M limit by taking the sizes of the 2776 // important VM memory regions (java heap and possibly the code cache) into 2777 // account. 2778 insertion_sort_descending(_page_sizes, n); 2779 const size_t size_limit = 2780 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 2781 int beg; 2782 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 2783 const int end = MIN2((int)usable_count, n) - 1; 2784 for (int cur = 0; cur < end; ++cur, ++beg) { 2785 _page_sizes[cur] = _page_sizes[beg]; 2786 } 2787 _page_sizes[end] = vm_page_size(); 2788 _page_sizes[end + 1] = 0; 2789 2790 if (_page_sizes[end] > _page_sizes[end - 1]) { 2791 // Default page size is not the smallest; sort again. 2792 insertion_sort_descending(_page_sizes, end + 1); 2793 } 2794 *page_size = _page_sizes[0]; 2795 2796 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 2797 return true; 2798 } 2799 2800 void os::large_page_init() { 2801 if (UseLargePages) { 2802 // print a warning if any large page related flag is specified on command line 2803 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 2804 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 2805 2806 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 2807 } 2808 } 2809 2810 bool os::Solaris::is_valid_page_size(size_t bytes) { 2811 for (int i = 0; _page_sizes[i] != 0; i++) { 2812 if (_page_sizes[i] == bytes) { 2813 return true; 2814 } 2815 } 2816 return false; 2817 } 2818 2819 bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 2820 assert(is_valid_page_size(align), SIZE_FORMAT " is not a valid page size", align); 2821 assert(is_aligned((void*) start, align), 2822 PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align); 2823 assert(is_aligned(bytes, align), 2824 SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align); 2825 2826 // Signal to OS that we want large pages for addresses 2827 // from addr, addr + bytes 2828 struct memcntl_mha mpss_struct; 2829 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 2830 mpss_struct.mha_pagesize = align; 2831 mpss_struct.mha_flags = 0; 2832 // Upon successful completion, memcntl() returns 0 2833 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 2834 debug_only(warning("Attempt to use MPSS failed.")); 2835 return false; 2836 } 2837 return true; 2838 } 2839 2840 char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 2841 fatal("os::reserve_memory_special should not be called on Solaris."); 2842 return NULL; 2843 } 2844 2845 bool os::release_memory_special(char* base, size_t bytes) { 2846 fatal("os::release_memory_special should not be called on Solaris."); 2847 return false; 2848 } 2849 2850 size_t os::large_page_size() { 2851 return _large_page_size; 2852 } 2853 2854 // MPSS allows application to commit large page memory on demand; with ISM 2855 // the entire memory region must be allocated as shared memory. 2856 bool os::can_commit_large_page_memory() { 2857 return true; 2858 } 2859 2860 bool os::can_execute_large_page_memory() { 2861 return true; 2862 } 2863 2864 // Read calls from inside the vm need to perform state transitions 2865 size_t os::read(int fd, void *buf, unsigned int nBytes) { 2866 size_t res; 2867 JavaThread* thread = (JavaThread*)Thread::current(); 2868 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 2869 ThreadBlockInVM tbiv(thread); 2870 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 2871 return res; 2872 } 2873 2874 size_t os::read_at(int fd, void *buf, unsigned int nBytes, jlong offset) { 2875 size_t res; 2876 JavaThread* thread = (JavaThread*)Thread::current(); 2877 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 2878 ThreadBlockInVM tbiv(thread); 2879 RESTARTABLE(::pread(fd, buf, (size_t) nBytes, offset), res); 2880 return res; 2881 } 2882 2883 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 2884 size_t res; 2885 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 2886 "Assumed _thread_in_native"); 2887 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 2888 return res; 2889 } 2890 2891 void os::naked_short_sleep(jlong ms) { 2892 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 2893 2894 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 2895 // Solaris requires -lrt for this. 2896 usleep((ms * 1000)); 2897 2898 return; 2899 } 2900 2901 // Sleep forever; naked call to OS-specific sleep; use with CAUTION 2902 void os::infinite_sleep() { 2903 while (true) { // sleep forever ... 2904 ::sleep(100); // ... 100 seconds at a time 2905 } 2906 } 2907 2908 // Used to convert frequent JVM_Yield() to nops 2909 bool os::dont_yield() { 2910 if (DontYieldALot) { 2911 static hrtime_t last_time = 0; 2912 hrtime_t diff = getTimeNanos() - last_time; 2913 2914 if (diff < DontYieldALotInterval * 1000000) { 2915 return true; 2916 } 2917 2918 last_time += diff; 2919 2920 return false; 2921 } else { 2922 return false; 2923 } 2924 } 2925 2926 // Note that yield semantics are defined by the scheduling class to which 2927 // the thread currently belongs. Typically, yield will _not yield to 2928 // other equal or higher priority threads that reside on the dispatch queues 2929 // of other CPUs. 2930 2931 void os::naked_yield() { 2932 thr_yield(); 2933 } 2934 2935 // Interface for setting lwp priorities. We are using T2 libthread, 2936 // which forces the use of bound threads, so all of our threads will 2937 // be assigned to real lwp's. Using the thr_setprio function is 2938 // meaningless in this mode so we must adjust the real lwp's priority. 2939 // The routines below implement the getting and setting of lwp priorities. 2940 // 2941 // Note: There are three priority scales used on Solaris. Java priotities 2942 // which range from 1 to 10, libthread "thr_setprio" scale which range 2943 // from 0 to 127, and the current scheduling class of the process we 2944 // are running in. This is typically from -60 to +60. 2945 // The setting of the lwp priorities in done after a call to thr_setprio 2946 // so Java priorities are mapped to libthread priorities and we map from 2947 // the latter to lwp priorities. We don't keep priorities stored in 2948 // Java priorities since some of our worker threads want to set priorities 2949 // higher than all Java threads. 2950 // 2951 // For related information: 2952 // (1) man -s 2 priocntl 2953 // (2) man -s 4 priocntl 2954 // (3) man dispadmin 2955 // = librt.so 2956 // = libthread/common/rtsched.c - thrp_setlwpprio(). 2957 // = ps -cL <pid> ... to validate priority. 2958 // = sched_get_priority_min and _max 2959 // pthread_create 2960 // sched_setparam 2961 // pthread_setschedparam 2962 // 2963 // Assumptions: 2964 // + We assume that all threads in the process belong to the same 2965 // scheduling class. IE. an homogenous process. 2966 // + Must be root or in IA group to change change "interactive" attribute. 2967 // Priocntl() will fail silently. The only indication of failure is when 2968 // we read-back the value and notice that it hasn't changed. 2969 // + Interactive threads enter the runq at the head, non-interactive at the tail. 2970 // + For RT, change timeslice as well. Invariant: 2971 // constant "priority integral" 2972 // Konst == TimeSlice * (60-Priority) 2973 // Given a priority, compute appropriate timeslice. 2974 // + Higher numerical values have higher priority. 2975 2976 // sched class attributes 2977 typedef struct { 2978 int schedPolicy; // classID 2979 int maxPrio; 2980 int minPrio; 2981 } SchedInfo; 2982 2983 2984 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 2985 2986 #ifdef ASSERT 2987 static int ReadBackValidate = 1; 2988 #endif 2989 static int myClass = 0; 2990 static int myMin = 0; 2991 static int myMax = 0; 2992 static int myCur = 0; 2993 static bool priocntl_enable = false; 2994 2995 static const int criticalPrio = FXCriticalPriority; 2996 static int java_MaxPriority_to_os_priority = 0; // Saved mapping 2997 2998 2999 // lwp_priocntl_init 3000 // 3001 // Try to determine the priority scale for our process. 3002 // 3003 // Return errno or 0 if OK. 3004 // 3005 static int lwp_priocntl_init() { 3006 int rslt; 3007 pcinfo_t ClassInfo; 3008 pcparms_t ParmInfo; 3009 int i; 3010 3011 if (!UseThreadPriorities) return 0; 3012 3013 // If ThreadPriorityPolicy is 1, switch tables 3014 if (ThreadPriorityPolicy == 1) { 3015 for (i = 0; i < CriticalPriority+1; i++) 3016 os::java_to_os_priority[i] = prio_policy1[i]; 3017 } 3018 if (UseCriticalJavaThreadPriority) { 3019 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3020 // See set_native_priority() and set_lwp_class_and_priority(). 3021 // Save original MaxPriority mapping in case attempt to 3022 // use critical priority fails. 3023 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3024 // Set negative to distinguish from other priorities 3025 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3026 } 3027 3028 // Get IDs for a set of well-known scheduling classes. 3029 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3030 // the system. We should have a loop that iterates over the 3031 // classID values, which are known to be "small" integers. 3032 3033 strcpy(ClassInfo.pc_clname, "TS"); 3034 ClassInfo.pc_cid = -1; 3035 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3036 if (rslt < 0) return errno; 3037 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3038 tsLimits.schedPolicy = ClassInfo.pc_cid; 3039 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3040 tsLimits.minPrio = -tsLimits.maxPrio; 3041 3042 strcpy(ClassInfo.pc_clname, "IA"); 3043 ClassInfo.pc_cid = -1; 3044 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3045 if (rslt < 0) return errno; 3046 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3047 iaLimits.schedPolicy = ClassInfo.pc_cid; 3048 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3049 iaLimits.minPrio = -iaLimits.maxPrio; 3050 3051 strcpy(ClassInfo.pc_clname, "RT"); 3052 ClassInfo.pc_cid = -1; 3053 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3054 if (rslt < 0) return errno; 3055 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3056 rtLimits.schedPolicy = ClassInfo.pc_cid; 3057 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3058 rtLimits.minPrio = 0; 3059 3060 strcpy(ClassInfo.pc_clname, "FX"); 3061 ClassInfo.pc_cid = -1; 3062 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3063 if (rslt < 0) return errno; 3064 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3065 fxLimits.schedPolicy = ClassInfo.pc_cid; 3066 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3067 fxLimits.minPrio = 0; 3068 3069 // Query our "current" scheduling class. 3070 // This will normally be IA, TS or, rarely, FX or RT. 3071 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3072 ParmInfo.pc_cid = PC_CLNULL; 3073 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3074 if (rslt < 0) return errno; 3075 myClass = ParmInfo.pc_cid; 3076 3077 // We now know our scheduling classId, get specific information 3078 // about the class. 3079 ClassInfo.pc_cid = myClass; 3080 ClassInfo.pc_clname[0] = 0; 3081 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3082 if (rslt < 0) return errno; 3083 3084 if (ThreadPriorityVerbose) { 3085 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3086 } 3087 3088 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3089 ParmInfo.pc_cid = PC_CLNULL; 3090 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3091 if (rslt < 0) return errno; 3092 3093 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3094 myMin = rtLimits.minPrio; 3095 myMax = rtLimits.maxPrio; 3096 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3097 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3098 myMin = iaLimits.minPrio; 3099 myMax = iaLimits.maxPrio; 3100 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3101 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3102 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3103 myMin = tsLimits.minPrio; 3104 myMax = tsLimits.maxPrio; 3105 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3106 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3107 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3108 myMin = fxLimits.minPrio; 3109 myMax = fxLimits.maxPrio; 3110 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3111 } else { 3112 // No clue - punt 3113 if (ThreadPriorityVerbose) { 3114 tty->print_cr("Unknown scheduling class: %s ... \n", 3115 ClassInfo.pc_clname); 3116 } 3117 return EINVAL; // no clue, punt 3118 } 3119 3120 if (ThreadPriorityVerbose) { 3121 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3122 } 3123 3124 priocntl_enable = true; // Enable changing priorities 3125 return 0; 3126 } 3127 3128 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3129 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3130 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3131 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3132 3133 3134 // scale_to_lwp_priority 3135 // 3136 // Convert from the libthread "thr_setprio" scale to our current 3137 // lwp scheduling class scale. 3138 // 3139 static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3140 int v; 3141 3142 if (x == 127) return rMax; // avoid round-down 3143 v = (((x*(rMax-rMin)))/128)+rMin; 3144 return v; 3145 } 3146 3147 3148 // set_lwp_class_and_priority 3149 int set_lwp_class_and_priority(int ThreadID, int lwpid, 3150 int newPrio, int new_class, bool scale) { 3151 int rslt; 3152 int Actual, Expected, prv; 3153 pcparms_t ParmInfo; // for GET-SET 3154 #ifdef ASSERT 3155 pcparms_t ReadBack; // for readback 3156 #endif 3157 3158 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3159 // Query current values. 3160 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3161 // Cache "pcparms_t" in global ParmCache. 3162 // TODO: elide set-to-same-value 3163 3164 // If something went wrong on init, don't change priorities. 3165 if (!priocntl_enable) { 3166 if (ThreadPriorityVerbose) { 3167 tty->print_cr("Trying to set priority but init failed, ignoring"); 3168 } 3169 return EINVAL; 3170 } 3171 3172 // If lwp hasn't started yet, just return 3173 // the _start routine will call us again. 3174 if (lwpid <= 0) { 3175 if (ThreadPriorityVerbose) { 3176 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3177 INTPTR_FORMAT " to %d, lwpid not set", 3178 ThreadID, newPrio); 3179 } 3180 return 0; 3181 } 3182 3183 if (ThreadPriorityVerbose) { 3184 tty->print_cr ("set_lwp_class_and_priority(" 3185 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3186 ThreadID, lwpid, newPrio); 3187 } 3188 3189 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3190 ParmInfo.pc_cid = PC_CLNULL; 3191 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3192 if (rslt < 0) return errno; 3193 3194 int cur_class = ParmInfo.pc_cid; 3195 ParmInfo.pc_cid = (id_t)new_class; 3196 3197 if (new_class == rtLimits.schedPolicy) { 3198 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3199 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3200 rtLimits.maxPrio, newPrio) 3201 : newPrio; 3202 rtInfo->rt_tqsecs = RT_NOCHANGE; 3203 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3204 if (ThreadPriorityVerbose) { 3205 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3206 } 3207 } else if (new_class == iaLimits.schedPolicy) { 3208 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3209 int maxClamped = MIN2(iaLimits.maxPrio, 3210 cur_class == new_class 3211 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3212 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3213 maxClamped, newPrio) 3214 : newPrio; 3215 iaInfo->ia_uprilim = cur_class == new_class 3216 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3217 iaInfo->ia_mode = IA_NOCHANGE; 3218 if (ThreadPriorityVerbose) { 3219 tty->print_cr("IA: [%d...%d] %d->%d\n", 3220 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3221 } 3222 } else if (new_class == tsLimits.schedPolicy) { 3223 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3224 int maxClamped = MIN2(tsLimits.maxPrio, 3225 cur_class == new_class 3226 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3227 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3228 maxClamped, newPrio) 3229 : newPrio; 3230 tsInfo->ts_uprilim = cur_class == new_class 3231 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3232 if (ThreadPriorityVerbose) { 3233 tty->print_cr("TS: [%d...%d] %d->%d\n", 3234 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3235 } 3236 } else if (new_class == fxLimits.schedPolicy) { 3237 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3238 int maxClamped = MIN2(fxLimits.maxPrio, 3239 cur_class == new_class 3240 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3241 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3242 maxClamped, newPrio) 3243 : newPrio; 3244 fxInfo->fx_uprilim = cur_class == new_class 3245 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3246 fxInfo->fx_tqsecs = FX_NOCHANGE; 3247 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3248 if (ThreadPriorityVerbose) { 3249 tty->print_cr("FX: [%d...%d] %d->%d\n", 3250 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3251 } 3252 } else { 3253 if (ThreadPriorityVerbose) { 3254 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3255 } 3256 return EINVAL; // no clue, punt 3257 } 3258 3259 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3260 if (ThreadPriorityVerbose && rslt) { 3261 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3262 } 3263 if (rslt < 0) return errno; 3264 3265 #ifdef ASSERT 3266 // Sanity check: read back what we just attempted to set. 3267 // In theory it could have changed in the interim ... 3268 // 3269 // The priocntl system call is tricky. 3270 // Sometimes it'll validate the priority value argument and 3271 // return EINVAL if unhappy. At other times it fails silently. 3272 // Readbacks are prudent. 3273 3274 if (!ReadBackValidate) return 0; 3275 3276 memset(&ReadBack, 0, sizeof(pcparms_t)); 3277 ReadBack.pc_cid = PC_CLNULL; 3278 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3279 assert(rslt >= 0, "priocntl failed"); 3280 Actual = Expected = 0xBAD; 3281 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3282 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3283 Actual = RTPRI(ReadBack)->rt_pri; 3284 Expected = RTPRI(ParmInfo)->rt_pri; 3285 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3286 Actual = IAPRI(ReadBack)->ia_upri; 3287 Expected = IAPRI(ParmInfo)->ia_upri; 3288 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3289 Actual = TSPRI(ReadBack)->ts_upri; 3290 Expected = TSPRI(ParmInfo)->ts_upri; 3291 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3292 Actual = FXPRI(ReadBack)->fx_upri; 3293 Expected = FXPRI(ParmInfo)->fx_upri; 3294 } else { 3295 if (ThreadPriorityVerbose) { 3296 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3297 ParmInfo.pc_cid); 3298 } 3299 } 3300 3301 if (Actual != Expected) { 3302 if (ThreadPriorityVerbose) { 3303 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3304 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3305 } 3306 } 3307 #endif 3308 3309 return 0; 3310 } 3311 3312 // Solaris only gives access to 128 real priorities at a time, 3313 // so we expand Java's ten to fill this range. This would be better 3314 // if we dynamically adjusted relative priorities. 3315 // 3316 // The ThreadPriorityPolicy option allows us to select 2 different 3317 // priority scales. 3318 // 3319 // ThreadPriorityPolicy=0 3320 // Since the Solaris' default priority is MaximumPriority, we do not 3321 // set a priority lower than Max unless a priority lower than 3322 // NormPriority is requested. 3323 // 3324 // ThreadPriorityPolicy=1 3325 // This mode causes the priority table to get filled with 3326 // linear values. NormPriority get's mapped to 50% of the 3327 // Maximum priority an so on. This will cause VM threads 3328 // to get unfair treatment against other Solaris processes 3329 // which do not explicitly alter their thread priorities. 3330 3331 int os::java_to_os_priority[CriticalPriority + 1] = { 3332 -99999, // 0 Entry should never be used 3333 3334 0, // 1 MinPriority 3335 32, // 2 3336 64, // 3 3337 3338 96, // 4 3339 127, // 5 NormPriority 3340 127, // 6 3341 3342 127, // 7 3343 127, // 8 3344 127, // 9 NearMaxPriority 3345 3346 127, // 10 MaxPriority 3347 3348 -criticalPrio // 11 CriticalPriority 3349 }; 3350 3351 OSReturn os::set_native_priority(Thread* thread, int newpri) { 3352 OSThread* osthread = thread->osthread(); 3353 3354 // Save requested priority in case the thread hasn't been started 3355 osthread->set_native_priority(newpri); 3356 3357 // Check for critical priority request 3358 bool fxcritical = false; 3359 if (newpri == -criticalPrio) { 3360 fxcritical = true; 3361 newpri = criticalPrio; 3362 } 3363 3364 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3365 if (!UseThreadPriorities) return OS_OK; 3366 3367 int status = 0; 3368 3369 if (!fxcritical) { 3370 // Use thr_setprio only if we have a priority that thr_setprio understands 3371 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3372 } 3373 3374 int lwp_status = 3375 set_lwp_class_and_priority(osthread->thread_id(), 3376 osthread->lwp_id(), 3377 newpri, 3378 fxcritical ? fxLimits.schedPolicy : myClass, 3379 !fxcritical); 3380 if (lwp_status != 0 && fxcritical) { 3381 // Try again, this time without changing the scheduling class 3382 newpri = java_MaxPriority_to_os_priority; 3383 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3384 osthread->lwp_id(), 3385 newpri, myClass, false); 3386 } 3387 status |= lwp_status; 3388 return (status == 0) ? OS_OK : OS_ERR; 3389 } 3390 3391 3392 OSReturn os::get_native_priority(const Thread* const thread, 3393 int *priority_ptr) { 3394 int p; 3395 if (!UseThreadPriorities) { 3396 *priority_ptr = NormalPriority; 3397 return OS_OK; 3398 } 3399 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3400 if (status != 0) { 3401 return OS_ERR; 3402 } 3403 *priority_ptr = p; 3404 return OS_OK; 3405 } 3406 3407 //////////////////////////////////////////////////////////////////////////////// 3408 // suspend/resume support 3409 3410 // The low-level signal-based suspend/resume support is a remnant from the 3411 // old VM-suspension that used to be for java-suspension, safepoints etc, 3412 // within hotspot. Currently used by JFR's OSThreadSampler 3413 // 3414 // The remaining code is greatly simplified from the more general suspension 3415 // code that used to be used. 3416 // 3417 // The protocol is quite simple: 3418 // - suspend: 3419 // - sends a signal to the target thread 3420 // - polls the suspend state of the osthread using a yield loop 3421 // - target thread signal handler (SR_handler) sets suspend state 3422 // and blocks in sigsuspend until continued 3423 // - resume: 3424 // - sets target osthread state to continue 3425 // - sends signal to end the sigsuspend loop in the SR_handler 3426 // 3427 // Note that the SR_lock plays no role in this suspend/resume protocol, 3428 // but is checked for NULL in SR_handler as a thread termination indicator. 3429 // The SR_lock is, however, used by JavaThread::java_suspend()/java_resume() APIs. 3430 // 3431 // Note that resume_clear_context() and suspend_save_context() are needed 3432 // by SR_handler(), so that fetch_frame_from_ucontext() works, 3433 // which in part is used by: 3434 // - Forte Analyzer: AsyncGetCallTrace() 3435 // - StackBanging: get_frame_at_stack_banging_point() 3436 // - JFR: get_topframe()-->....-->get_valid_uc_in_signal_handler() 3437 3438 static void resume_clear_context(OSThread *osthread) { 3439 osthread->set_ucontext(NULL); 3440 } 3441 3442 static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3443 osthread->set_ucontext(context); 3444 } 3445 3446 static PosixSemaphore sr_semaphore; 3447 3448 void os::Solaris::SR_handler(Thread* thread, ucontext_t* context) { 3449 // Save and restore errno to avoid confusing native code with EINTR 3450 // after sigsuspend. 3451 int old_errno = errno; 3452 3453 OSThread* osthread = thread->osthread(); 3454 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3455 3456 os::SuspendResume::State current = osthread->sr.state(); 3457 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3458 suspend_save_context(osthread, context); 3459 3460 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3461 os::SuspendResume::State state = osthread->sr.suspended(); 3462 if (state == os::SuspendResume::SR_SUSPENDED) { 3463 sigset_t suspend_set; // signals for sigsuspend() 3464 3465 // get current set of blocked signals and unblock resume signal 3466 pthread_sigmask(SIG_BLOCK, NULL, &suspend_set); 3467 sigdelset(&suspend_set, ASYNC_SIGNAL); 3468 3469 sr_semaphore.signal(); 3470 // wait here until we are resumed 3471 while (1) { 3472 sigsuspend(&suspend_set); 3473 3474 os::SuspendResume::State result = osthread->sr.running(); 3475 if (result == os::SuspendResume::SR_RUNNING) { 3476 sr_semaphore.signal(); 3477 break; 3478 } 3479 } 3480 3481 } else if (state == os::SuspendResume::SR_RUNNING) { 3482 // request was cancelled, continue 3483 } else { 3484 ShouldNotReachHere(); 3485 } 3486 3487 resume_clear_context(osthread); 3488 } else if (current == os::SuspendResume::SR_RUNNING) { 3489 // request was cancelled, continue 3490 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3491 // ignore 3492 } else { 3493 // ignore 3494 } 3495 3496 errno = old_errno; 3497 } 3498 3499 void os::print_statistics() { 3500 } 3501 3502 bool os::message_box(const char* title, const char* message) { 3503 int i; 3504 fdStream err(defaultStream::error_fd()); 3505 for (i = 0; i < 78; i++) err.print_raw("="); 3506 err.cr(); 3507 err.print_raw_cr(title); 3508 for (i = 0; i < 78; i++) err.print_raw("-"); 3509 err.cr(); 3510 err.print_raw_cr(message); 3511 for (i = 0; i < 78; i++) err.print_raw("="); 3512 err.cr(); 3513 3514 char buf[16]; 3515 // Prevent process from exiting upon "read error" without consuming all CPU 3516 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3517 3518 return buf[0] == 'y' || buf[0] == 'Y'; 3519 } 3520 3521 static int sr_notify(OSThread* osthread) { 3522 int status = thr_kill(osthread->thread_id(), ASYNC_SIGNAL); 3523 assert_status(status == 0, status, "thr_kill"); 3524 return status; 3525 } 3526 3527 // "Randomly" selected value for how long we want to spin 3528 // before bailing out on suspending a thread, also how often 3529 // we send a signal to a thread we want to resume 3530 static const int RANDOMLY_LARGE_INTEGER = 1000000; 3531 static const int RANDOMLY_LARGE_INTEGER2 = 100; 3532 3533 static bool do_suspend(OSThread* osthread) { 3534 assert(osthread->sr.is_running(), "thread should be running"); 3535 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3536 3537 // mark as suspended and send signal 3538 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3539 // failed to switch, state wasn't running? 3540 ShouldNotReachHere(); 3541 return false; 3542 } 3543 3544 if (sr_notify(osthread) != 0) { 3545 ShouldNotReachHere(); 3546 } 3547 3548 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3549 while (true) { 3550 if (sr_semaphore.timedwait(create_semaphore_timespec(0, 2000 * NANOSECS_PER_MILLISEC))) { 3551 break; 3552 } else { 3553 // timeout 3554 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3555 if (cancelled == os::SuspendResume::SR_RUNNING) { 3556 return false; 3557 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3558 // make sure that we consume the signal on the semaphore as well 3559 sr_semaphore.wait(); 3560 break; 3561 } else { 3562 ShouldNotReachHere(); 3563 return false; 3564 } 3565 } 3566 } 3567 3568 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3569 return true; 3570 } 3571 3572 static void do_resume(OSThread* osthread) { 3573 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3574 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3575 3576 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3577 // failed to switch to WAKEUP_REQUEST 3578 ShouldNotReachHere(); 3579 return; 3580 } 3581 3582 while (true) { 3583 if (sr_notify(osthread) == 0) { 3584 if (sr_semaphore.timedwait(create_semaphore_timespec(0, 2 * NANOSECS_PER_MILLISEC))) { 3585 if (osthread->sr.is_running()) { 3586 return; 3587 } 3588 } 3589 } else { 3590 ShouldNotReachHere(); 3591 } 3592 } 3593 3594 guarantee(osthread->sr.is_running(), "Must be running!"); 3595 } 3596 3597 void os::SuspendedThreadTask::internal_do_task() { 3598 if (do_suspend(_thread->osthread())) { 3599 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3600 do_task(context); 3601 do_resume(_thread->osthread()); 3602 } 3603 } 3604 3605 // This does not do anything on Solaris. This is basically a hook for being 3606 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3607 void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3608 const methodHandle& method, JavaCallArguments* args, 3609 Thread* thread) { 3610 f(value, method, args, thread); 3611 } 3612 3613 // This routine may be used by user applications as a "hook" to catch signals. 3614 // The user-defined signal handler must pass unrecognized signals to this 3615 // routine, and if it returns true (non-zero), then the signal handler must 3616 // return immediately. If the flag "abort_if_unrecognized" is true, then this 3617 // routine will never retun false (zero), but instead will execute a VM panic 3618 // routine kill the process. 3619 // 3620 // If this routine returns false, it is OK to call it again. This allows 3621 // the user-defined signal handler to perform checks either before or after 3622 // the VM performs its own checks. Naturally, the user code would be making 3623 // a serious error if it tried to handle an exception (such as a null check 3624 // or breakpoint) that the VM was generating for its own correct operation. 3625 // 3626 // This routine may recognize any of the following kinds of signals: 3627 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3628 // ASYNC_SIGNAL. 3629 // It should be consulted by handlers for any of those signals. 3630 // 3631 // The caller of this routine must pass in the three arguments supplied 3632 // to the function referred to in the "sa_sigaction" (not the "sa_handler") 3633 // field of the structure passed to sigaction(). This routine assumes that 3634 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3635 // 3636 // Note that the VM will print warnings if it detects conflicting signal 3637 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3638 // 3639 extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3640 siginfo_t* siginfo, 3641 void* ucontext, 3642 int abort_if_unrecognized); 3643 3644 3645 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3646 int orig_errno = errno; // Preserve errno value over signal handler. 3647 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3648 errno = orig_errno; 3649 } 3650 3651 // This boolean allows users to forward their own non-matching signals 3652 // to JVM_handle_solaris_signal, harmlessly. 3653 bool os::Solaris::signal_handlers_are_installed = false; 3654 3655 // For signal-chaining 3656 bool os::Solaris::libjsig_is_loaded = false; 3657 typedef struct sigaction *(*get_signal_t)(int); 3658 get_signal_t os::Solaris::get_signal_action = NULL; 3659 3660 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3661 struct sigaction *actp = NULL; 3662 3663 if ((libjsig_is_loaded) && (sig <= Maxsignum)) { 3664 // Retrieve the old signal handler from libjsig 3665 actp = (*get_signal_action)(sig); 3666 } 3667 if (actp == NULL) { 3668 // Retrieve the preinstalled signal handler from jvm 3669 actp = get_preinstalled_handler(sig); 3670 } 3671 3672 return actp; 3673 } 3674 3675 static bool call_chained_handler(struct sigaction *actp, int sig, 3676 siginfo_t *siginfo, void *context) { 3677 // Call the old signal handler 3678 if (actp->sa_handler == SIG_DFL) { 3679 // It's more reasonable to let jvm treat it as an unexpected exception 3680 // instead of taking the default action. 3681 return false; 3682 } else if (actp->sa_handler != SIG_IGN) { 3683 if ((actp->sa_flags & SA_NODEFER) == 0) { 3684 // automaticlly block the signal 3685 sigaddset(&(actp->sa_mask), sig); 3686 } 3687 3688 sa_handler_t hand; 3689 sa_sigaction_t sa; 3690 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 3691 // retrieve the chained handler 3692 if (siginfo_flag_set) { 3693 sa = actp->sa_sigaction; 3694 } else { 3695 hand = actp->sa_handler; 3696 } 3697 3698 if ((actp->sa_flags & SA_RESETHAND) != 0) { 3699 actp->sa_handler = SIG_DFL; 3700 } 3701 3702 // try to honor the signal mask 3703 sigset_t oset; 3704 pthread_sigmask(SIG_SETMASK, &(actp->sa_mask), &oset); 3705 3706 // call into the chained handler 3707 if (siginfo_flag_set) { 3708 (*sa)(sig, siginfo, context); 3709 } else { 3710 (*hand)(sig); 3711 } 3712 3713 // restore the signal mask 3714 pthread_sigmask(SIG_SETMASK, &oset, 0); 3715 } 3716 // Tell jvm's signal handler the signal is taken care of. 3717 return true; 3718 } 3719 3720 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 3721 bool chained = false; 3722 // signal-chaining 3723 if (UseSignalChaining) { 3724 struct sigaction *actp = get_chained_signal_action(sig); 3725 if (actp != NULL) { 3726 chained = call_chained_handler(actp, sig, siginfo, context); 3727 } 3728 } 3729 return chained; 3730 } 3731 3732 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 3733 assert((chainedsigactions != (struct sigaction *)NULL) && 3734 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3735 if (preinstalled_sigs[sig] != 0) { 3736 return &chainedsigactions[sig]; 3737 } 3738 return NULL; 3739 } 3740 3741 void os::Solaris::save_preinstalled_handler(int sig, 3742 struct sigaction& oldAct) { 3743 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 3744 assert((chainedsigactions != (struct sigaction *)NULL) && 3745 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 3746 chainedsigactions[sig] = oldAct; 3747 preinstalled_sigs[sig] = 1; 3748 } 3749 3750 void os::Solaris::set_signal_handler(int sig, bool set_installed, 3751 bool oktochain) { 3752 // Check for overwrite. 3753 struct sigaction oldAct; 3754 sigaction(sig, (struct sigaction*)NULL, &oldAct); 3755 void* oldhand = 3756 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3757 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3758 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 3759 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 3760 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 3761 if (AllowUserSignalHandlers || !set_installed) { 3762 // Do not overwrite; user takes responsibility to forward to us. 3763 return; 3764 } else if (UseSignalChaining) { 3765 if (oktochain) { 3766 // save the old handler in jvm 3767 save_preinstalled_handler(sig, oldAct); 3768 } else { 3769 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal."); 3770 } 3771 // libjsig also interposes the sigaction() call below and saves the 3772 // old sigaction on it own. 3773 } else { 3774 fatal("Encountered unexpected pre-existing sigaction handler " 3775 "%#lx for signal %d.", (long)oldhand, sig); 3776 } 3777 } 3778 3779 struct sigaction sigAct; 3780 sigfillset(&(sigAct.sa_mask)); 3781 sigAct.sa_handler = SIG_DFL; 3782 3783 sigAct.sa_sigaction = signalHandler; 3784 // Handle SIGSEGV on alternate signal stack if 3785 // not using stack banging 3786 if (!UseStackBanging && sig == SIGSEGV) { 3787 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 3788 } else { 3789 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 3790 } 3791 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 3792 3793 sigaction(sig, &sigAct, &oldAct); 3794 3795 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 3796 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 3797 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 3798 } 3799 3800 3801 #define DO_SIGNAL_CHECK(sig) \ 3802 do { \ 3803 if (!sigismember(&check_signal_done, sig)) { \ 3804 os::Solaris::check_signal_handler(sig); \ 3805 } \ 3806 } while (0) 3807 3808 // This method is a periodic task to check for misbehaving JNI applications 3809 // under CheckJNI, we can add any periodic checks here 3810 3811 void os::run_periodic_checks() { 3812 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 3813 // thereby preventing a NULL checks. 3814 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 3815 3816 if (check_signals == false) return; 3817 3818 // SEGV and BUS if overridden could potentially prevent 3819 // generation of hs*.log in the event of a crash, debugging 3820 // such a case can be very challenging, so we absolutely 3821 // check for the following for a good measure: 3822 DO_SIGNAL_CHECK(SIGSEGV); 3823 DO_SIGNAL_CHECK(SIGILL); 3824 DO_SIGNAL_CHECK(SIGFPE); 3825 DO_SIGNAL_CHECK(SIGBUS); 3826 DO_SIGNAL_CHECK(SIGPIPE); 3827 DO_SIGNAL_CHECK(SIGXFSZ); 3828 DO_SIGNAL_CHECK(ASYNC_SIGNAL); 3829 3830 // ReduceSignalUsage allows the user to override these handlers 3831 // see comments at the very top and jvm_solaris.h 3832 if (!ReduceSignalUsage) { 3833 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 3834 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 3835 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 3836 DO_SIGNAL_CHECK(BREAK_SIGNAL); 3837 } 3838 } 3839 3840 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 3841 3842 static os_sigaction_t os_sigaction = NULL; 3843 3844 void os::Solaris::check_signal_handler(int sig) { 3845 char buf[O_BUFLEN]; 3846 address jvmHandler = NULL; 3847 3848 struct sigaction act; 3849 if (os_sigaction == NULL) { 3850 // only trust the default sigaction, in case it has been interposed 3851 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 3852 if (os_sigaction == NULL) return; 3853 } 3854 3855 os_sigaction(sig, (struct sigaction*)NULL, &act); 3856 3857 address thisHandler = (act.sa_flags & SA_SIGINFO) 3858 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 3859 : CAST_FROM_FN_PTR(address, act.sa_handler); 3860 3861 3862 switch (sig) { 3863 case SIGSEGV: 3864 case SIGBUS: 3865 case SIGFPE: 3866 case SIGPIPE: 3867 case SIGXFSZ: 3868 case SIGILL: 3869 case ASYNC_SIGNAL: 3870 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 3871 break; 3872 3873 case SHUTDOWN1_SIGNAL: 3874 case SHUTDOWN2_SIGNAL: 3875 case SHUTDOWN3_SIGNAL: 3876 case BREAK_SIGNAL: 3877 jvmHandler = (address)user_handler(); 3878 break; 3879 3880 default: 3881 return; 3882 } 3883 3884 if (thisHandler != jvmHandler) { 3885 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 3886 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 3887 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 3888 // No need to check this sig any longer 3889 sigaddset(&check_signal_done, sig); 3890 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 3891 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 3892 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 3893 exception_name(sig, buf, O_BUFLEN)); 3894 } 3895 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 3896 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 3897 tty->print("expected:"); 3898 os::Posix::print_sa_flags(tty, os::Solaris::get_our_sigflags(sig)); 3899 tty->cr(); 3900 tty->print(" found:"); 3901 os::Posix::print_sa_flags(tty, act.sa_flags); 3902 tty->cr(); 3903 // No need to check this sig any longer 3904 sigaddset(&check_signal_done, sig); 3905 } 3906 3907 // Print all the signal handler state 3908 if (sigismember(&check_signal_done, sig)) { 3909 print_signal_handlers(tty, buf, O_BUFLEN); 3910 } 3911 3912 } 3913 3914 void os::Solaris::install_signal_handlers() { 3915 signal_handlers_are_installed = true; 3916 3917 // signal-chaining 3918 typedef void (*signal_setting_t)(); 3919 signal_setting_t begin_signal_setting = NULL; 3920 signal_setting_t end_signal_setting = NULL; 3921 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 3922 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 3923 if (begin_signal_setting != NULL) { 3924 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 3925 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 3926 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 3927 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 3928 libjsig_is_loaded = true; 3929 assert(UseSignalChaining, "should enable signal-chaining"); 3930 } 3931 if (libjsig_is_loaded) { 3932 // Tell libjsig jvm is setting signal handlers 3933 (*begin_signal_setting)(); 3934 } 3935 3936 set_signal_handler(SIGSEGV, true, true); 3937 set_signal_handler(SIGPIPE, true, true); 3938 set_signal_handler(SIGXFSZ, true, true); 3939 set_signal_handler(SIGBUS, true, true); 3940 set_signal_handler(SIGILL, true, true); 3941 set_signal_handler(SIGFPE, true, true); 3942 set_signal_handler(ASYNC_SIGNAL, true, true); 3943 3944 if (libjsig_is_loaded) { 3945 // Tell libjsig jvm finishes setting signal handlers 3946 (*end_signal_setting)(); 3947 } 3948 3949 // We don't activate signal checker if libjsig is in place, we trust ourselves 3950 // and if UserSignalHandler is installed all bets are off. 3951 // Log that signal checking is off only if -verbose:jni is specified. 3952 if (CheckJNICalls) { 3953 if (libjsig_is_loaded) { 3954 if (PrintJNIResolving) { 3955 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 3956 } 3957 check_signals = false; 3958 } 3959 if (AllowUserSignalHandlers) { 3960 if (PrintJNIResolving) { 3961 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 3962 } 3963 check_signals = false; 3964 } 3965 } 3966 } 3967 3968 3969 void report_error(const char* file_name, int line_no, const char* title, 3970 const char* format, ...); 3971 3972 // (Static) wrappers for the liblgrp API 3973 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 3974 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 3975 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 3976 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 3977 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 3978 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 3979 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 3980 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 3981 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 3982 3983 static address resolve_symbol_lazy(const char* name) { 3984 address addr = (address) dlsym(RTLD_DEFAULT, name); 3985 if (addr == NULL) { 3986 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 3987 addr = (address) dlsym(RTLD_NEXT, name); 3988 } 3989 return addr; 3990 } 3991 3992 static address resolve_symbol(const char* name) { 3993 address addr = resolve_symbol_lazy(name); 3994 if (addr == NULL) { 3995 fatal(dlerror()); 3996 } 3997 return addr; 3998 } 3999 4000 void os::Solaris::libthread_init() { 4001 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4002 4003 lwp_priocntl_init(); 4004 4005 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4006 if (func == NULL) { 4007 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4008 // Guarantee that this VM is running on an new enough OS (5.6 or 4009 // later) that it will have a new enough libthread.so. 4010 guarantee(func != NULL, "libthread.so is too old."); 4011 } 4012 4013 int size; 4014 void (*handler_info_func)(address *, int *); 4015 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4016 handler_info_func(&handler_start, &size); 4017 handler_end = handler_start + size; 4018 } 4019 4020 4021 int_fnP_mutex_tP os::Solaris::_mutex_lock; 4022 int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4023 int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4024 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4025 int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4026 int os::Solaris::_mutex_scope = USYNC_THREAD; 4027 4028 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4029 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4030 int_fnP_cond_tP os::Solaris::_cond_signal; 4031 int_fnP_cond_tP os::Solaris::_cond_broadcast; 4032 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4033 int_fnP_cond_tP os::Solaris::_cond_destroy; 4034 int os::Solaris::_cond_scope = USYNC_THREAD; 4035 bool os::Solaris::_synchronization_initialized; 4036 4037 void os::Solaris::synchronization_init() { 4038 if (UseLWPSynchronization) { 4039 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4040 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4041 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4042 os::Solaris::set_mutex_init(lwp_mutex_init); 4043 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4044 os::Solaris::set_mutex_scope(USYNC_THREAD); 4045 4046 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4047 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4048 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4049 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4050 os::Solaris::set_cond_init(lwp_cond_init); 4051 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4052 os::Solaris::set_cond_scope(USYNC_THREAD); 4053 } else { 4054 os::Solaris::set_mutex_scope(USYNC_THREAD); 4055 os::Solaris::set_cond_scope(USYNC_THREAD); 4056 4057 if (UsePthreads) { 4058 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4059 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4060 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4061 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4062 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4063 4064 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4065 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4066 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4067 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4068 os::Solaris::set_cond_init(pthread_cond_default_init); 4069 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4070 } else { 4071 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4072 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4073 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4074 os::Solaris::set_mutex_init(::mutex_init); 4075 os::Solaris::set_mutex_destroy(::mutex_destroy); 4076 4077 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4078 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4079 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4080 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4081 os::Solaris::set_cond_init(::cond_init); 4082 os::Solaris::set_cond_destroy(::cond_destroy); 4083 } 4084 } 4085 _synchronization_initialized = true; 4086 } 4087 4088 bool os::Solaris::liblgrp_init() { 4089 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4090 if (handle != NULL) { 4091 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4092 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4093 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4094 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4095 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4096 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4097 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4098 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4099 dlsym(handle, "lgrp_cookie_stale"))); 4100 4101 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4102 set_lgrp_cookie(c); 4103 return true; 4104 } 4105 return false; 4106 } 4107 4108 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4109 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4110 static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4111 4112 void init_pset_getloadavg_ptr(void) { 4113 pset_getloadavg_ptr = 4114 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4115 if (pset_getloadavg_ptr == NULL) { 4116 log_warning(os)("pset_getloadavg function not found"); 4117 } 4118 } 4119 4120 int os::Solaris::_dev_zero_fd = -1; 4121 4122 // this is called _before_ the global arguments have been parsed 4123 void os::init(void) { 4124 _initial_pid = getpid(); 4125 4126 max_hrtime = first_hrtime = gethrtime(); 4127 4128 init_random(1234567); 4129 4130 page_size = sysconf(_SC_PAGESIZE); 4131 if (page_size == -1) { 4132 fatal("os_solaris.cpp: os::init: sysconf failed (%s)", os::strerror(errno)); 4133 } 4134 init_page_sizes((size_t) page_size); 4135 4136 Solaris::initialize_system_info(); 4137 4138 int fd = ::open("/dev/zero", O_RDWR); 4139 if (fd < 0) { 4140 fatal("os::init: cannot open /dev/zero (%s)", os::strerror(errno)); 4141 } else { 4142 Solaris::set_dev_zero_fd(fd); 4143 4144 // Close on exec, child won't inherit. 4145 fcntl(fd, F_SETFD, FD_CLOEXEC); 4146 } 4147 4148 clock_tics_per_sec = CLK_TCK; 4149 4150 // check if dladdr1() exists; dladdr1 can provide more information than 4151 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4152 // and is available on linker patches for 5.7 and 5.8. 4153 // libdl.so must have been loaded, this call is just an entry lookup 4154 void * hdl = dlopen("libdl.so", RTLD_NOW); 4155 if (hdl) { 4156 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4157 } 4158 4159 // main_thread points to the thread that created/loaded the JVM. 4160 main_thread = thr_self(); 4161 4162 // dynamic lookup of functions that may not be available in our lowest 4163 // supported Solaris release 4164 void * handle = dlopen("libc.so.1", RTLD_LAZY); 4165 if (handle != NULL) { 4166 Solaris::_pthread_setname_np = // from 11.3 4167 (Solaris::pthread_setname_np_func_t)dlsym(handle, "pthread_setname_np"); 4168 } 4169 } 4170 4171 // To install functions for atexit system call 4172 extern "C" { 4173 static void perfMemory_exit_helper() { 4174 perfMemory_exit(); 4175 } 4176 } 4177 4178 // this is called _after_ the global arguments have been parsed 4179 jint os::init_2(void) { 4180 // try to enable extended file IO ASAP, see 6431278 4181 os::Solaris::try_enable_extended_io(); 4182 4183 // Check and sets minimum stack sizes against command line options 4184 if (Posix::set_minimum_stack_sizes() == JNI_ERR) { 4185 return JNI_ERR; 4186 } 4187 4188 Solaris::libthread_init(); 4189 4190 if (UseNUMA) { 4191 if (!Solaris::liblgrp_init()) { 4192 UseNUMA = false; 4193 } else { 4194 size_t lgrp_limit = os::numa_get_groups_num(); 4195 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4196 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4197 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4198 if (lgrp_num < 2) { 4199 // There's only one locality group, disable NUMA. 4200 UseNUMA = false; 4201 } 4202 } 4203 if (!UseNUMA && ForceNUMA) { 4204 UseNUMA = true; 4205 } 4206 } 4207 4208 Solaris::signal_sets_init(); 4209 Solaris::init_signal_mem(); 4210 Solaris::install_signal_handlers(); 4211 // Initialize data for jdk.internal.misc.Signal 4212 if (!ReduceSignalUsage) { 4213 jdk_misc_signal_init(); 4214 } 4215 4216 // initialize synchronization primitives to use either thread or 4217 // lwp synchronization (controlled by UseLWPSynchronization) 4218 Solaris::synchronization_init(); 4219 4220 if (MaxFDLimit) { 4221 // set the number of file descriptors to max. print out error 4222 // if getrlimit/setrlimit fails but continue regardless. 4223 struct rlimit nbr_files; 4224 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4225 if (status != 0) { 4226 log_info(os)("os::init_2 getrlimit failed: %s", os::strerror(errno)); 4227 } else { 4228 nbr_files.rlim_cur = nbr_files.rlim_max; 4229 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4230 if (status != 0) { 4231 log_info(os)("os::init_2 setrlimit failed: %s", os::strerror(errno)); 4232 } 4233 } 4234 } 4235 4236 // Calculate theoretical max. size of Threads to guard gainst 4237 // artifical out-of-memory situations, where all available address- 4238 // space has been reserved by thread stacks. Default stack size is 1Mb. 4239 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4240 JavaThread::stack_size_at_create() : (1*K*K); 4241 assert(pre_thread_stack_size != 0, "Must have a stack"); 4242 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4243 // we should start doing Virtual Memory banging. Currently when the threads will 4244 // have used all but 200Mb of space. 4245 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4246 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4247 4248 // at-exit methods are called in the reverse order of their registration. 4249 // In Solaris 7 and earlier, atexit functions are called on return from 4250 // main or as a result of a call to exit(3C). There can be only 32 of 4251 // these functions registered and atexit() does not set errno. In Solaris 4252 // 8 and later, there is no limit to the number of functions registered 4253 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4254 // functions are called upon dlclose(3DL) in addition to return from main 4255 // and exit(3C). 4256 4257 if (PerfAllowAtExitRegistration) { 4258 // only register atexit functions if PerfAllowAtExitRegistration is set. 4259 // atexit functions can be delayed until process exit time, which 4260 // can be problematic for embedded VM situations. Embedded VMs should 4261 // call DestroyJavaVM() to assure that VM resources are released. 4262 4263 // note: perfMemory_exit_helper atexit function may be removed in 4264 // the future if the appropriate cleanup code can be added to the 4265 // VM_Exit VMOperation's doit method. 4266 if (atexit(perfMemory_exit_helper) != 0) { 4267 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4268 } 4269 } 4270 4271 // Init pset_loadavg function pointer 4272 init_pset_getloadavg_ptr(); 4273 4274 return JNI_OK; 4275 } 4276 4277 // Mark the polling page as unreadable 4278 void os::make_polling_page_unreadable(void) { 4279 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4280 fatal("Could not disable polling page"); 4281 } 4282 } 4283 4284 // Mark the polling page as readable 4285 void os::make_polling_page_readable(void) { 4286 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4287 fatal("Could not enable polling page"); 4288 } 4289 } 4290 4291 // Is a (classpath) directory empty? 4292 bool os::dir_is_empty(const char* path) { 4293 DIR *dir = NULL; 4294 struct dirent *ptr; 4295 4296 dir = opendir(path); 4297 if (dir == NULL) return true; 4298 4299 // Scan the directory 4300 bool result = true; 4301 while (result && (ptr = readdir(dir)) != NULL) { 4302 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4303 result = false; 4304 } 4305 } 4306 closedir(dir); 4307 return result; 4308 } 4309 4310 // This code originates from JDK's sysOpen and open64_w 4311 // from src/solaris/hpi/src/system_md.c 4312 4313 int os::open(const char *path, int oflag, int mode) { 4314 if (strlen(path) > MAX_PATH - 1) { 4315 errno = ENAMETOOLONG; 4316 return -1; 4317 } 4318 int fd; 4319 4320 fd = ::open64(path, oflag, mode); 4321 if (fd == -1) return -1; 4322 4323 // If the open succeeded, the file might still be a directory 4324 { 4325 struct stat64 buf64; 4326 int ret = ::fstat64(fd, &buf64); 4327 int st_mode = buf64.st_mode; 4328 4329 if (ret != -1) { 4330 if ((st_mode & S_IFMT) == S_IFDIR) { 4331 errno = EISDIR; 4332 ::close(fd); 4333 return -1; 4334 } 4335 } else { 4336 ::close(fd); 4337 return -1; 4338 } 4339 } 4340 4341 // 32-bit Solaris systems suffer from: 4342 // 4343 // - an historical default soft limit of 256 per-process file 4344 // descriptors that is too low for many Java programs. 4345 // 4346 // - a design flaw where file descriptors created using stdio 4347 // fopen must be less than 256, _even_ when the first limit above 4348 // has been raised. This can cause calls to fopen (but not calls to 4349 // open, for example) to fail mysteriously, perhaps in 3rd party 4350 // native code (although the JDK itself uses fopen). One can hardly 4351 // criticize them for using this most standard of all functions. 4352 // 4353 // We attempt to make everything work anyways by: 4354 // 4355 // - raising the soft limit on per-process file descriptors beyond 4356 // 256 4357 // 4358 // - As of Solaris 10u4, we can request that Solaris raise the 256 4359 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4360 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4361 // 4362 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4363 // workaround the bug by remapping non-stdio file descriptors below 4364 // 256 to ones beyond 256, which is done below. 4365 // 4366 // See: 4367 // 1085341: 32-bit stdio routines should support file descriptors >255 4368 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4369 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4370 // enable_extended_FILE_stdio() in VM initialisation 4371 // Giri Mandalika's blog 4372 // http://technopark02.blogspot.com/2005_05_01_archive.html 4373 // 4374 #ifndef _LP64 4375 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4376 int newfd = ::fcntl(fd, F_DUPFD, 256); 4377 if (newfd != -1) { 4378 ::close(fd); 4379 fd = newfd; 4380 } 4381 } 4382 #endif // 32-bit Solaris 4383 4384 // All file descriptors that are opened in the JVM and not 4385 // specifically destined for a subprocess should have the 4386 // close-on-exec flag set. If we don't set it, then careless 3rd 4387 // party native code might fork and exec without closing all 4388 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4389 // UNIXProcess.c), and this in turn might: 4390 // 4391 // - cause end-of-file to fail to be detected on some file 4392 // descriptors, resulting in mysterious hangs, or 4393 // 4394 // - might cause an fopen in the subprocess to fail on a system 4395 // suffering from bug 1085341. 4396 // 4397 // (Yes, the default setting of the close-on-exec flag is a Unix 4398 // design flaw) 4399 // 4400 // See: 4401 // 1085341: 32-bit stdio routines should support file descriptors >255 4402 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4403 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4404 // 4405 #ifdef FD_CLOEXEC 4406 { 4407 int flags = ::fcntl(fd, F_GETFD); 4408 if (flags != -1) { 4409 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4410 } 4411 } 4412 #endif 4413 4414 return fd; 4415 } 4416 4417 // create binary file, rewriting existing file if required 4418 int os::create_binary_file(const char* path, bool rewrite_existing) { 4419 int oflags = O_WRONLY | O_CREAT; 4420 if (!rewrite_existing) { 4421 oflags |= O_EXCL; 4422 } 4423 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4424 } 4425 4426 // return current position of file pointer 4427 jlong os::current_file_offset(int fd) { 4428 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4429 } 4430 4431 // move file pointer to the specified offset 4432 jlong os::seek_to_file_offset(int fd, jlong offset) { 4433 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4434 } 4435 4436 jlong os::lseek(int fd, jlong offset, int whence) { 4437 return (jlong) ::lseek64(fd, offset, whence); 4438 } 4439 4440 int os::ftruncate(int fd, jlong length) { 4441 return ::ftruncate64(fd, length); 4442 } 4443 4444 int os::fsync(int fd) { 4445 RESTARTABLE_RETURN_INT(::fsync(fd)); 4446 } 4447 4448 int os::available(int fd, jlong *bytes) { 4449 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4450 "Assumed _thread_in_native"); 4451 jlong cur, end; 4452 int mode; 4453 struct stat64 buf64; 4454 4455 if (::fstat64(fd, &buf64) >= 0) { 4456 mode = buf64.st_mode; 4457 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4458 int n,ioctl_return; 4459 4460 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4461 if (ioctl_return>= 0) { 4462 *bytes = n; 4463 return 1; 4464 } 4465 } 4466 } 4467 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4468 return 0; 4469 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4470 return 0; 4471 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4472 return 0; 4473 } 4474 *bytes = end - cur; 4475 return 1; 4476 } 4477 4478 // Map a block of memory. 4479 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4480 char *addr, size_t bytes, bool read_only, 4481 bool allow_exec) { 4482 int prot; 4483 int flags; 4484 4485 if (read_only) { 4486 prot = PROT_READ; 4487 flags = MAP_SHARED; 4488 } else { 4489 prot = PROT_READ | PROT_WRITE; 4490 flags = MAP_PRIVATE; 4491 } 4492 4493 if (allow_exec) { 4494 prot |= PROT_EXEC; 4495 } 4496 4497 if (addr != NULL) { 4498 flags |= MAP_FIXED; 4499 } 4500 4501 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4502 fd, file_offset); 4503 if (mapped_address == MAP_FAILED) { 4504 return NULL; 4505 } 4506 return mapped_address; 4507 } 4508 4509 4510 // Remap a block of memory. 4511 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 4512 char *addr, size_t bytes, bool read_only, 4513 bool allow_exec) { 4514 // same as map_memory() on this OS 4515 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4516 allow_exec); 4517 } 4518 4519 4520 // Unmap a block of memory. 4521 bool os::pd_unmap_memory(char* addr, size_t bytes) { 4522 return munmap(addr, bytes) == 0; 4523 } 4524 4525 void os::pause() { 4526 char filename[MAX_PATH]; 4527 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4528 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4529 } else { 4530 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4531 } 4532 4533 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4534 if (fd != -1) { 4535 struct stat buf; 4536 ::close(fd); 4537 while (::stat(filename, &buf) == 0) { 4538 (void)::poll(NULL, 0, 100); 4539 } 4540 } else { 4541 jio_fprintf(stderr, 4542 "Could not open pause file '%s', continuing immediately.\n", filename); 4543 } 4544 } 4545 4546 #ifndef PRODUCT 4547 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4548 // Turn this on if you need to trace synch operations. 4549 // Set RECORD_SYNCH_LIMIT to a large-enough value, 4550 // and call record_synch_enable and record_synch_disable 4551 // around the computation of interest. 4552 4553 void record_synch(char* name, bool returning); // defined below 4554 4555 class RecordSynch { 4556 char* _name; 4557 public: 4558 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 4559 ~RecordSynch() { record_synch(_name, true); } 4560 }; 4561 4562 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 4563 extern "C" ret name params { \ 4564 typedef ret name##_t params; \ 4565 static name##_t* implem = NULL; \ 4566 static int callcount = 0; \ 4567 if (implem == NULL) { \ 4568 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 4569 if (implem == NULL) fatal(dlerror()); \ 4570 } \ 4571 ++callcount; \ 4572 RecordSynch _rs(#name); \ 4573 inner; \ 4574 return implem args; \ 4575 } 4576 // in dbx, examine callcounts this way: 4577 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 4578 4579 #define CHECK_POINTER_OK(p) \ 4580 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 4581 #define CHECK_MU \ 4582 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 4583 #define CHECK_CV \ 4584 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 4585 #define CHECK_P(p) \ 4586 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 4587 4588 #define CHECK_MUTEX(mutex_op) \ 4589 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 4590 4591 CHECK_MUTEX( mutex_lock) 4592 CHECK_MUTEX( _mutex_lock) 4593 CHECK_MUTEX( mutex_unlock) 4594 CHECK_MUTEX(_mutex_unlock) 4595 CHECK_MUTEX( mutex_trylock) 4596 CHECK_MUTEX(_mutex_trylock) 4597 4598 #define CHECK_COND(cond_op) \ 4599 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 4600 4601 CHECK_COND( cond_wait); 4602 CHECK_COND(_cond_wait); 4603 CHECK_COND(_cond_wait_cancel); 4604 4605 #define CHECK_COND2(cond_op) \ 4606 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 4607 4608 CHECK_COND2( cond_timedwait); 4609 CHECK_COND2(_cond_timedwait); 4610 CHECK_COND2(_cond_timedwait_cancel); 4611 4612 // do the _lwp_* versions too 4613 #define mutex_t lwp_mutex_t 4614 #define cond_t lwp_cond_t 4615 CHECK_MUTEX( _lwp_mutex_lock) 4616 CHECK_MUTEX( _lwp_mutex_unlock) 4617 CHECK_MUTEX( _lwp_mutex_trylock) 4618 CHECK_MUTEX( __lwp_mutex_lock) 4619 CHECK_MUTEX( __lwp_mutex_unlock) 4620 CHECK_MUTEX( __lwp_mutex_trylock) 4621 CHECK_MUTEX(___lwp_mutex_lock) 4622 CHECK_MUTEX(___lwp_mutex_unlock) 4623 4624 CHECK_COND( _lwp_cond_wait); 4625 CHECK_COND( __lwp_cond_wait); 4626 CHECK_COND(___lwp_cond_wait); 4627 4628 CHECK_COND2( _lwp_cond_timedwait); 4629 CHECK_COND2( __lwp_cond_timedwait); 4630 #undef mutex_t 4631 #undef cond_t 4632 4633 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4634 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 4635 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 4636 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 4637 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4638 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 4639 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4640 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 4641 4642 4643 // recording machinery: 4644 4645 enum { RECORD_SYNCH_LIMIT = 200 }; 4646 char* record_synch_name[RECORD_SYNCH_LIMIT]; 4647 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 4648 bool record_synch_returning[RECORD_SYNCH_LIMIT]; 4649 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 4650 int record_synch_count = 0; 4651 bool record_synch_enabled = false; 4652 4653 // in dbx, examine recorded data this way: 4654 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 4655 4656 void record_synch(char* name, bool returning) { 4657 if (record_synch_enabled) { 4658 if (record_synch_count < RECORD_SYNCH_LIMIT) { 4659 record_synch_name[record_synch_count] = name; 4660 record_synch_returning[record_synch_count] = returning; 4661 record_synch_thread[record_synch_count] = thr_self(); 4662 record_synch_arg0ptr[record_synch_count] = &name; 4663 record_synch_count++; 4664 } 4665 // put more checking code here: 4666 // ... 4667 } 4668 } 4669 4670 void record_synch_enable() { 4671 // start collecting trace data, if not already doing so 4672 if (!record_synch_enabled) record_synch_count = 0; 4673 record_synch_enabled = true; 4674 } 4675 4676 void record_synch_disable() { 4677 // stop collecting trace data 4678 record_synch_enabled = false; 4679 } 4680 4681 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4682 #endif // PRODUCT 4683 4684 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 4685 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 4686 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 4687 4688 4689 // JVMTI & JVM monitoring and management support 4690 // The thread_cpu_time() and current_thread_cpu_time() are only 4691 // supported if is_thread_cpu_time_supported() returns true. 4692 // They are not supported on Solaris T1. 4693 4694 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 4695 // are used by JVM M&M and JVMTI to get user+sys or user CPU time 4696 // of a thread. 4697 // 4698 // current_thread_cpu_time() and thread_cpu_time(Thread *) 4699 // returns the fast estimate available on the platform. 4700 4701 // hrtime_t gethrvtime() return value includes 4702 // user time but does not include system time 4703 jlong os::current_thread_cpu_time() { 4704 return (jlong) gethrvtime(); 4705 } 4706 4707 jlong os::thread_cpu_time(Thread *thread) { 4708 // return user level CPU time only to be consistent with 4709 // what current_thread_cpu_time returns. 4710 // thread_cpu_time_info() must be changed if this changes 4711 return os::thread_cpu_time(thread, false /* user time only */); 4712 } 4713 4714 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 4715 if (user_sys_cpu_time) { 4716 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 4717 } else { 4718 return os::current_thread_cpu_time(); 4719 } 4720 } 4721 4722 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 4723 char proc_name[64]; 4724 int count; 4725 prusage_t prusage; 4726 jlong lwp_time; 4727 int fd; 4728 4729 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 4730 getpid(), 4731 thread->osthread()->lwp_id()); 4732 fd = ::open(proc_name, O_RDONLY); 4733 if (fd == -1) return -1; 4734 4735 do { 4736 count = ::pread(fd, 4737 (void *)&prusage.pr_utime, 4738 thr_time_size, 4739 thr_time_off); 4740 } while (count < 0 && errno == EINTR); 4741 ::close(fd); 4742 if (count < 0) return -1; 4743 4744 if (user_sys_cpu_time) { 4745 // user + system CPU time 4746 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 4747 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 4748 (jlong)prusage.pr_stime.tv_nsec + 4749 (jlong)prusage.pr_utime.tv_nsec; 4750 } else { 4751 // user level CPU time only 4752 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 4753 (jlong)prusage.pr_utime.tv_nsec; 4754 } 4755 4756 return (lwp_time); 4757 } 4758 4759 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 4760 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 4761 info_ptr->may_skip_backward = false; // elapsed time not wall time 4762 info_ptr->may_skip_forward = false; // elapsed time not wall time 4763 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 4764 } 4765 4766 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 4767 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 4768 info_ptr->may_skip_backward = false; // elapsed time not wall time 4769 info_ptr->may_skip_forward = false; // elapsed time not wall time 4770 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 4771 } 4772 4773 bool os::is_thread_cpu_time_supported() { 4774 return true; 4775 } 4776 4777 // System loadavg support. Returns -1 if load average cannot be obtained. 4778 // Return the load average for our processor set if the primitive exists 4779 // (Solaris 9 and later). Otherwise just return system wide loadavg. 4780 int os::loadavg(double loadavg[], int nelem) { 4781 if (pset_getloadavg_ptr != NULL) { 4782 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 4783 } else { 4784 return ::getloadavg(loadavg, nelem); 4785 } 4786 } 4787 4788 //--------------------------------------------------------------------------------- 4789 4790 bool os::find(address addr, outputStream* st) { 4791 Dl_info dlinfo; 4792 memset(&dlinfo, 0, sizeof(dlinfo)); 4793 if (dladdr(addr, &dlinfo) != 0) { 4794 st->print(PTR_FORMAT ": ", addr); 4795 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 4796 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 4797 } else if (dlinfo.dli_fbase != NULL) { 4798 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 4799 } else { 4800 st->print("<absolute address>"); 4801 } 4802 if (dlinfo.dli_fname != NULL) { 4803 st->print(" in %s", dlinfo.dli_fname); 4804 } 4805 if (dlinfo.dli_fbase != NULL) { 4806 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 4807 } 4808 st->cr(); 4809 4810 if (Verbose) { 4811 // decode some bytes around the PC 4812 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 4813 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 4814 address lowest = (address) dlinfo.dli_sname; 4815 if (!lowest) lowest = (address) dlinfo.dli_fbase; 4816 if (begin < lowest) begin = lowest; 4817 Dl_info dlinfo2; 4818 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 4819 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 4820 end = (address) dlinfo2.dli_saddr; 4821 } 4822 Disassembler::decode(begin, end, st); 4823 } 4824 return true; 4825 } 4826 return false; 4827 } 4828 4829 // Following function has been added to support HotSparc's libjvm.so running 4830 // under Solaris production JDK 1.2.2 / 1.3.0. These came from 4831 // src/solaris/hpi/native_threads in the EVM codebase. 4832 // 4833 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 4834 // libraries and should thus be removed. We will leave it behind for a while 4835 // until we no longer want to able to run on top of 1.3.0 Solaris production 4836 // JDK. See 4341971. 4837 4838 #define STACK_SLACK 0x800 4839 4840 extern "C" { 4841 intptr_t sysThreadAvailableStackWithSlack() { 4842 stack_t st; 4843 intptr_t retval, stack_top; 4844 retval = thr_stksegment(&st); 4845 assert(retval == 0, "incorrect return value from thr_stksegment"); 4846 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 4847 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 4848 stack_top=(intptr_t)st.ss_sp-st.ss_size; 4849 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 4850 } 4851 } 4852 4853 // ObjectMonitor park-unpark infrastructure ... 4854 // 4855 // We implement Solaris and Linux PlatformEvents with the 4856 // obvious condvar-mutex-flag triple. 4857 // Another alternative that works quite well is pipes: 4858 // Each PlatformEvent consists of a pipe-pair. 4859 // The thread associated with the PlatformEvent 4860 // calls park(), which reads from the input end of the pipe. 4861 // Unpark() writes into the other end of the pipe. 4862 // The write-side of the pipe must be set NDELAY. 4863 // Unfortunately pipes consume a large # of handles. 4864 // Native solaris lwp_park() and lwp_unpark() work nicely, too. 4865 // Using pipes for the 1st few threads might be workable, however. 4866 // 4867 // park() is permitted to return spuriously. 4868 // Callers of park() should wrap the call to park() in 4869 // an appropriate loop. A litmus test for the correct 4870 // usage of park is the following: if park() were modified 4871 // to immediately return 0 your code should still work, 4872 // albeit degenerating to a spin loop. 4873 // 4874 // In a sense, park()-unpark() just provides more polite spinning 4875 // and polling with the key difference over naive spinning being 4876 // that a parked thread needs to be explicitly unparked() in order 4877 // to wake up and to poll the underlying condition. 4878 // 4879 // Assumption: 4880 // Only one parker can exist on an event, which is why we allocate 4881 // them per-thread. Multiple unparkers can coexist. 4882 // 4883 // _Event transitions in park() 4884 // -1 => -1 : illegal 4885 // 1 => 0 : pass - return immediately 4886 // 0 => -1 : block; then set _Event to 0 before returning 4887 // 4888 // _Event transitions in unpark() 4889 // 0 => 1 : just return 4890 // 1 => 1 : just return 4891 // -1 => either 0 or 1; must signal target thread 4892 // That is, we can safely transition _Event from -1 to either 4893 // 0 or 1. 4894 // 4895 // _Event serves as a restricted-range semaphore. 4896 // -1 : thread is blocked, i.e. there is a waiter 4897 // 0 : neutral: thread is running or ready, 4898 // could have been signaled after a wait started 4899 // 1 : signaled - thread is running or ready 4900 // 4901 // Another possible encoding of _Event would be with 4902 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 4903 // 4904 // TODO-FIXME: add DTRACE probes for: 4905 // 1. Tx parks 4906 // 2. Ty unparks Tx 4907 // 3. Tx resumes from park 4908 4909 4910 // value determined through experimentation 4911 #define ROUNDINGFIX 11 4912 4913 // utility to compute the abstime argument to timedwait. 4914 // TODO-FIXME: switch from compute_abstime() to unpackTime(). 4915 4916 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 4917 // millis is the relative timeout time 4918 // abstime will be the absolute timeout time 4919 if (millis < 0) millis = 0; 4920 struct timeval now; 4921 int status = gettimeofday(&now, NULL); 4922 assert(status == 0, "gettimeofday"); 4923 jlong seconds = millis / 1000; 4924 jlong max_wait_period; 4925 4926 if (UseLWPSynchronization) { 4927 // forward port of fix for 4275818 (not sleeping long enough) 4928 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 4929 // _lwp_cond_timedwait() used a round_down algorithm rather 4930 // than a round_up. For millis less than our roundfactor 4931 // it rounded down to 0 which doesn't meet the spec. 4932 // For millis > roundfactor we may return a bit sooner, but 4933 // since we can not accurately identify the patch level and 4934 // this has already been fixed in Solaris 9 and 8 we will 4935 // leave it alone rather than always rounding down. 4936 4937 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 4938 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 4939 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 4940 max_wait_period = 21000000; 4941 } else { 4942 max_wait_period = 50000000; 4943 } 4944 millis %= 1000; 4945 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 4946 seconds = max_wait_period; 4947 } 4948 abstime->tv_sec = now.tv_sec + seconds; 4949 long usec = now.tv_usec + millis * 1000; 4950 if (usec >= 1000000) { 4951 abstime->tv_sec += 1; 4952 usec -= 1000000; 4953 } 4954 abstime->tv_nsec = usec * 1000; 4955 return abstime; 4956 } 4957 4958 void os::PlatformEvent::park() { // AKA: down() 4959 // Transitions for _Event: 4960 // -1 => -1 : illegal 4961 // 1 => 0 : pass - return immediately 4962 // 0 => -1 : block; then set _Event to 0 before returning 4963 4964 // Invariant: Only the thread associated with the Event/PlatformEvent 4965 // may call park(). 4966 assert(_nParked == 0, "invariant"); 4967 4968 int v; 4969 for (;;) { 4970 v = _Event; 4971 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 4972 } 4973 guarantee(v >= 0, "invariant"); 4974 if (v == 0) { 4975 // Do this the hard way by blocking ... 4976 // See http://monaco.sfbay/detail.jsf?cr=5094058. 4977 int status = os::Solaris::mutex_lock(_mutex); 4978 assert_status(status == 0, status, "mutex_lock"); 4979 guarantee(_nParked == 0, "invariant"); 4980 ++_nParked; 4981 while (_Event < 0) { 4982 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 4983 // Treat this the same as if the wait was interrupted 4984 // With usr/lib/lwp going to kernel, always handle ETIME 4985 status = os::Solaris::cond_wait(_cond, _mutex); 4986 if (status == ETIME) status = EINTR; 4987 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 4988 } 4989 --_nParked; 4990 _Event = 0; 4991 status = os::Solaris::mutex_unlock(_mutex); 4992 assert_status(status == 0, status, "mutex_unlock"); 4993 // Paranoia to ensure our locked and lock-free paths interact 4994 // correctly with each other. 4995 OrderAccess::fence(); 4996 } 4997 } 4998 4999 int os::PlatformEvent::park(jlong millis) { 5000 // Transitions for _Event: 5001 // -1 => -1 : illegal 5002 // 1 => 0 : pass - return immediately 5003 // 0 => -1 : block; then set _Event to 0 before returning 5004 5005 guarantee(_nParked == 0, "invariant"); 5006 int v; 5007 for (;;) { 5008 v = _Event; 5009 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5010 } 5011 guarantee(v >= 0, "invariant"); 5012 if (v != 0) return OS_OK; 5013 5014 int ret = OS_TIMEOUT; 5015 timestruc_t abst; 5016 compute_abstime(&abst, millis); 5017 5018 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5019 int status = os::Solaris::mutex_lock(_mutex); 5020 assert_status(status == 0, status, "mutex_lock"); 5021 guarantee(_nParked == 0, "invariant"); 5022 ++_nParked; 5023 while (_Event < 0) { 5024 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5025 assert_status(status == 0 || status == EINTR || 5026 status == ETIME || status == ETIMEDOUT, 5027 status, "cond_timedwait"); 5028 if (!FilterSpuriousWakeups) break; // previous semantics 5029 if (status == ETIME || status == ETIMEDOUT) break; 5030 // We consume and ignore EINTR and spurious wakeups. 5031 } 5032 --_nParked; 5033 if (_Event >= 0) ret = OS_OK; 5034 _Event = 0; 5035 status = os::Solaris::mutex_unlock(_mutex); 5036 assert_status(status == 0, status, "mutex_unlock"); 5037 // Paranoia to ensure our locked and lock-free paths interact 5038 // correctly with each other. 5039 OrderAccess::fence(); 5040 return ret; 5041 } 5042 5043 void os::PlatformEvent::unpark() { 5044 // Transitions for _Event: 5045 // 0 => 1 : just return 5046 // 1 => 1 : just return 5047 // -1 => either 0 or 1; must signal target thread 5048 // That is, we can safely transition _Event from -1 to either 5049 // 0 or 1. 5050 // See also: "Semaphores in Plan 9" by Mullender & Cox 5051 // 5052 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5053 // that it will take two back-to-back park() calls for the owning 5054 // thread to block. This has the benefit of forcing a spurious return 5055 // from the first park() call after an unpark() call which will help 5056 // shake out uses of park() and unpark() without condition variables. 5057 5058 if (Atomic::xchg(1, &_Event) >= 0) return; 5059 5060 // If the thread associated with the event was parked, wake it. 5061 // Wait for the thread assoc with the PlatformEvent to vacate. 5062 int status = os::Solaris::mutex_lock(_mutex); 5063 assert_status(status == 0, status, "mutex_lock"); 5064 int AnyWaiters = _nParked; 5065 status = os::Solaris::mutex_unlock(_mutex); 5066 assert_status(status == 0, status, "mutex_unlock"); 5067 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5068 if (AnyWaiters != 0) { 5069 // Note that we signal() *after* dropping the lock for "immortal" Events. 5070 // This is safe and avoids a common class of futile wakeups. In rare 5071 // circumstances this can cause a thread to return prematurely from 5072 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5073 // will simply re-test the condition and re-park itself. 5074 // This provides particular benefit if the underlying platform does not 5075 // provide wait morphing. 5076 status = os::Solaris::cond_signal(_cond); 5077 assert_status(status == 0, status, "cond_signal"); 5078 } 5079 } 5080 5081 // JSR166 5082 // ------------------------------------------------------- 5083 5084 // The solaris and linux implementations of park/unpark are fairly 5085 // conservative for now, but can be improved. They currently use a 5086 // mutex/condvar pair, plus _counter. 5087 // Park decrements _counter if > 0, else does a condvar wait. Unpark 5088 // sets count to 1 and signals condvar. Only one thread ever waits 5089 // on the condvar. Contention seen when trying to park implies that someone 5090 // is unparking you, so don't wait. And spurious returns are fine, so there 5091 // is no need to track notifications. 5092 5093 #define MAX_SECS 100000000 5094 5095 // This code is common to linux and solaris and will be moved to a 5096 // common place in dolphin. 5097 // 5098 // The passed in time value is either a relative time in nanoseconds 5099 // or an absolute time in milliseconds. Either way it has to be unpacked 5100 // into suitable seconds and nanoseconds components and stored in the 5101 // given timespec structure. 5102 // Given time is a 64-bit value and the time_t used in the timespec is only 5103 // a signed-32-bit value (except on 64-bit Linux) we have to watch for 5104 // overflow if times way in the future are given. Further on Solaris versions 5105 // prior to 10 there is a restriction (see cond_timedwait) that the specified 5106 // number of seconds, in abstime, is less than current_time + 100,000,000. 5107 // As it will be 28 years before "now + 100000000" will overflow we can 5108 // ignore overflow and just impose a hard-limit on seconds using the value 5109 // of "now + 100,000,000". This places a limit on the timeout of about 3.17 5110 // years from "now". 5111 // 5112 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5113 assert(time > 0, "convertTime"); 5114 5115 struct timeval now; 5116 int status = gettimeofday(&now, NULL); 5117 assert(status == 0, "gettimeofday"); 5118 5119 time_t max_secs = now.tv_sec + MAX_SECS; 5120 5121 if (isAbsolute) { 5122 jlong secs = time / 1000; 5123 if (secs > max_secs) { 5124 absTime->tv_sec = max_secs; 5125 } else { 5126 absTime->tv_sec = secs; 5127 } 5128 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5129 } else { 5130 jlong secs = time / NANOSECS_PER_SEC; 5131 if (secs >= MAX_SECS) { 5132 absTime->tv_sec = max_secs; 5133 absTime->tv_nsec = 0; 5134 } else { 5135 absTime->tv_sec = now.tv_sec + secs; 5136 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5137 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5138 absTime->tv_nsec -= NANOSECS_PER_SEC; 5139 ++absTime->tv_sec; // note: this must be <= max_secs 5140 } 5141 } 5142 } 5143 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5144 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5145 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5146 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5147 } 5148 5149 void Parker::park(bool isAbsolute, jlong time) { 5150 // Ideally we'd do something useful while spinning, such 5151 // as calling unpackTime(). 5152 5153 // Optional fast-path check: 5154 // Return immediately if a permit is available. 5155 // We depend on Atomic::xchg() having full barrier semantics 5156 // since we are doing a lock-free update to _counter. 5157 if (Atomic::xchg(0, &_counter) > 0) return; 5158 5159 // Optional fast-exit: Check interrupt before trying to wait 5160 Thread* thread = Thread::current(); 5161 assert(thread->is_Java_thread(), "Must be JavaThread"); 5162 JavaThread *jt = (JavaThread *)thread; 5163 if (Thread::is_interrupted(thread, false)) { 5164 return; 5165 } 5166 5167 // First, demultiplex/decode time arguments 5168 timespec absTime; 5169 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5170 return; 5171 } 5172 if (time > 0) { 5173 // Warning: this code might be exposed to the old Solaris time 5174 // round-down bugs. Grep "roundingFix" for details. 5175 unpackTime(&absTime, isAbsolute, time); 5176 } 5177 5178 // Enter safepoint region 5179 // Beware of deadlocks such as 6317397. 5180 // The per-thread Parker:: _mutex is a classic leaf-lock. 5181 // In particular a thread must never block on the Threads_lock while 5182 // holding the Parker:: mutex. If safepoints are pending both the 5183 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5184 ThreadBlockInVM tbivm(jt); 5185 5186 // Don't wait if cannot get lock since interference arises from 5187 // unblocking. Also. check interrupt before trying wait 5188 if (Thread::is_interrupted(thread, false) || 5189 os::Solaris::mutex_trylock(_mutex) != 0) { 5190 return; 5191 } 5192 5193 int status; 5194 5195 if (_counter > 0) { // no wait needed 5196 _counter = 0; 5197 status = os::Solaris::mutex_unlock(_mutex); 5198 assert(status == 0, "invariant"); 5199 // Paranoia to ensure our locked and lock-free paths interact 5200 // correctly with each other and Java-level accesses. 5201 OrderAccess::fence(); 5202 return; 5203 } 5204 5205 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5206 jt->set_suspend_equivalent(); 5207 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5208 5209 // Do this the hard way by blocking ... 5210 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5211 if (time == 0) { 5212 status = os::Solaris::cond_wait(_cond, _mutex); 5213 } else { 5214 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5215 } 5216 // Note that an untimed cond_wait() can sometimes return ETIME on older 5217 // versions of the Solaris. 5218 assert_status(status == 0 || status == EINTR || 5219 status == ETIME || status == ETIMEDOUT, 5220 status, "cond_timedwait"); 5221 5222 _counter = 0; 5223 status = os::Solaris::mutex_unlock(_mutex); 5224 assert_status(status == 0, status, "mutex_unlock"); 5225 // Paranoia to ensure our locked and lock-free paths interact 5226 // correctly with each other and Java-level accesses. 5227 OrderAccess::fence(); 5228 5229 // If externally suspended while waiting, re-suspend 5230 if (jt->handle_special_suspend_equivalent_condition()) { 5231 jt->java_suspend_self(); 5232 } 5233 } 5234 5235 void Parker::unpark() { 5236 int status = os::Solaris::mutex_lock(_mutex); 5237 assert(status == 0, "invariant"); 5238 const int s = _counter; 5239 _counter = 1; 5240 status = os::Solaris::mutex_unlock(_mutex); 5241 assert(status == 0, "invariant"); 5242 5243 if (s < 1) { 5244 status = os::Solaris::cond_signal(_cond); 5245 assert(status == 0, "invariant"); 5246 } 5247 } 5248 5249 extern char** environ; 5250 5251 // Run the specified command in a separate process. Return its exit value, 5252 // or -1 on failure (e.g. can't fork a new process). 5253 // Unlike system(), this function can be called from signal handler. It 5254 // doesn't block SIGINT et al. 5255 int os::fork_and_exec(char* cmd, bool use_vfork_if_available) { 5256 char * argv[4]; 5257 argv[0] = (char *)"sh"; 5258 argv[1] = (char *)"-c"; 5259 argv[2] = cmd; 5260 argv[3] = NULL; 5261 5262 // fork is async-safe, fork1 is not so can't use in signal handler 5263 pid_t pid; 5264 Thread* t = Thread::current_or_null_safe(); 5265 if (t != NULL && t->is_inside_signal_handler()) { 5266 pid = fork(); 5267 } else { 5268 pid = fork1(); 5269 } 5270 5271 if (pid < 0) { 5272 // fork failed 5273 warning("fork failed: %s", os::strerror(errno)); 5274 return -1; 5275 5276 } else if (pid == 0) { 5277 // child process 5278 5279 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5280 execve("/usr/bin/sh", argv, environ); 5281 5282 // execve failed 5283 _exit(-1); 5284 5285 } else { 5286 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5287 // care about the actual exit code, for now. 5288 5289 int status; 5290 5291 // Wait for the child process to exit. This returns immediately if 5292 // the child has already exited. */ 5293 while (waitpid(pid, &status, 0) < 0) { 5294 switch (errno) { 5295 case ECHILD: return 0; 5296 case EINTR: break; 5297 default: return -1; 5298 } 5299 } 5300 5301 if (WIFEXITED(status)) { 5302 // The child exited normally; get its exit code. 5303 return WEXITSTATUS(status); 5304 } else if (WIFSIGNALED(status)) { 5305 // The child exited because of a signal 5306 // The best value to return is 0x80 + signal number, 5307 // because that is what all Unix shells do, and because 5308 // it allows callers to distinguish between process exit and 5309 // process death by signal. 5310 return 0x80 + WTERMSIG(status); 5311 } else { 5312 // Unknown exit code; pass it through 5313 return status; 5314 } 5315 } 5316 } 5317 5318 size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5319 size_t res; 5320 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5321 return res; 5322 } 5323 5324 int os::close(int fd) { 5325 return ::close(fd); 5326 } 5327 5328 int os::socket_close(int fd) { 5329 return ::close(fd); 5330 } 5331 5332 int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5333 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5334 "Assumed _thread_in_native"); 5335 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5336 } 5337 5338 int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5339 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5340 "Assumed _thread_in_native"); 5341 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5342 } 5343 5344 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5345 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5346 } 5347 5348 // As both poll and select can be interrupted by signals, we have to be 5349 // prepared to restart the system call after updating the timeout, unless 5350 // a poll() is done with timeout == -1, in which case we repeat with this 5351 // "wait forever" value. 5352 5353 int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5354 int _result; 5355 _result = ::connect(fd, him, len); 5356 5357 // On Solaris, when a connect() call is interrupted, the connection 5358 // can be established asynchronously (see 6343810). Subsequent calls 5359 // to connect() must check the errno value which has the semantic 5360 // described below (copied from the connect() man page). Handling 5361 // of asynchronously established connections is required for both 5362 // blocking and non-blocking sockets. 5363 // EINTR The connection attempt was interrupted 5364 // before any data arrived by the delivery of 5365 // a signal. The connection, however, will be 5366 // established asynchronously. 5367 // 5368 // EINPROGRESS The socket is non-blocking, and the connec- 5369 // tion cannot be completed immediately. 5370 // 5371 // EALREADY The socket is non-blocking, and a previous 5372 // connection attempt has not yet been com- 5373 // pleted. 5374 // 5375 // EISCONN The socket is already connected. 5376 if (_result == OS_ERR && errno == EINTR) { 5377 // restarting a connect() changes its errno semantics 5378 RESTARTABLE(::connect(fd, him, len), _result); 5379 // undo these changes 5380 if (_result == OS_ERR) { 5381 if (errno == EALREADY) { 5382 errno = EINPROGRESS; // fall through 5383 } else if (errno == EISCONN) { 5384 errno = 0; 5385 return OS_OK; 5386 } 5387 } 5388 } 5389 return _result; 5390 } 5391 5392 // Get the default path to the core file 5393 // Returns the length of the string 5394 int os::get_core_path(char* buffer, size_t bufferSize) { 5395 const char* p = get_current_directory(buffer, bufferSize); 5396 5397 if (p == NULL) { 5398 assert(p != NULL, "failed to get current directory"); 5399 return 0; 5400 } 5401 5402 jio_snprintf(buffer, bufferSize, "%s/core or core.%d", 5403 p, current_process_id()); 5404 5405 return strlen(buffer); 5406 } 5407 5408 #ifndef PRODUCT 5409 void TestReserveMemorySpecial_test() { 5410 // No tests available for this platform 5411 } 5412 #endif 5413 5414 bool os::start_debugging(char *buf, int buflen) { 5415 int len = (int)strlen(buf); 5416 char *p = &buf[len]; 5417 5418 jio_snprintf(p, buflen-len, 5419 "\n\n" 5420 "Do you want to debug the problem?\n\n" 5421 "To debug, run 'dbx - %d'; then switch to thread " INTX_FORMAT "\n" 5422 "Enter 'yes' to launch dbx automatically (PATH must include dbx)\n" 5423 "Otherwise, press RETURN to abort...", 5424 os::current_process_id(), os::current_thread_id()); 5425 5426 bool yes = os::message_box("Unexpected Error", buf); 5427 5428 if (yes) { 5429 // yes, user asked VM to launch debugger 5430 jio_snprintf(buf, sizeof(buf), "dbx - %d", os::current_process_id()); 5431 5432 os::fork_and_exec(buf); 5433 yes = false; 5434 } 5435 return yes; 5436 }