os_solaris.cpp revision 7331:110ec5963eb1
1/* 2 * Copyright (c) 1997, 2014, 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 "classfile/classLoader.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "code/icBuffer.hpp" 30#include "code/vtableStubs.hpp" 31#include "compiler/compileBroker.hpp" 32#include "compiler/disassembler.hpp" 33#include "interpreter/interpreter.hpp" 34#include "jvm_solaris.h" 35#include "memory/allocation.inline.hpp" 36#include "memory/filemap.hpp" 37#include "mutex_solaris.inline.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.h" 43#include "prims/jvm_misc.hpp" 44#include "runtime/arguments.hpp" 45#include "runtime/atomic.inline.hpp" 46#include "runtime/extendedPC.hpp" 47#include "runtime/globals.hpp" 48#include "runtime/interfaceSupport.hpp" 49#include "runtime/java.hpp" 50#include "runtime/javaCalls.hpp" 51#include "runtime/mutexLocker.hpp" 52#include "runtime/objectMonitor.hpp" 53#include "runtime/orderAccess.inline.hpp" 54#include "runtime/osThread.hpp" 55#include "runtime/perfMemory.hpp" 56#include "runtime/sharedRuntime.hpp" 57#include "runtime/statSampler.hpp" 58#include "runtime/stubRoutines.hpp" 59#include "runtime/thread.inline.hpp" 60#include "runtime/threadCritical.hpp" 61#include "runtime/timer.hpp" 62#include "runtime/vm_version.hpp" 63#include "services/attachListener.hpp" 64#include "services/memTracker.hpp" 65#include "services/runtimeService.hpp" 66#include "utilities/decoder.hpp" 67#include "utilities/defaultStream.hpp" 68#include "utilities/events.hpp" 69#include "utilities/growableArray.hpp" 70#include "utilities/vmError.hpp" 71 72// put OS-includes here 73# include <dlfcn.h> 74# include <errno.h> 75# include <exception> 76# include <link.h> 77# include <poll.h> 78# include <pthread.h> 79# include <pwd.h> 80# include <schedctl.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// see thr_setprio(3T) for the basis of these numbers 141#define MinimumPriority 0 142#define NormalPriority 64 143#define MaximumPriority 127 144 145// Values for ThreadPriorityPolicy == 1 146int prio_policy1[CriticalPriority+1] = { 147 -99999, 0, 16, 32, 48, 64, 148 80, 96, 112, 124, 127, 127 }; 149 150// System parameters used internally 151static clock_t clock_tics_per_sec = 100; 152 153// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 154static bool enabled_extended_FILE_stdio = false; 155 156// For diagnostics to print a message once. see run_periodic_checks 157static bool check_addr0_done = false; 158static sigset_t check_signal_done; 159static bool check_signals = true; 160 161address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 162address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 163 164address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 165 166 167// "default" initializers for missing libc APIs 168extern "C" { 169 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 170 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 171 172 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 173 static int lwp_cond_destroy(cond_t *cv) { return 0; } 174} 175 176// "default" initializers for pthread-based synchronization 177extern "C" { 178 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 179 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 180} 181 182static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 183 184// Thread Local Storage 185// This is common to all Solaris platforms so it is defined here, 186// in this common file. 187// The declarations are in the os_cpu threadLS*.hpp files. 188// 189// Static member initialization for TLS 190Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 191 192#ifndef PRODUCT 193 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 194 195int ThreadLocalStorage::_tcacheHit = 0; 196int ThreadLocalStorage::_tcacheMiss = 0; 197 198void ThreadLocalStorage::print_statistics() { 199 int total = _tcacheMiss+_tcacheHit; 200 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 201 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 202} 203 #undef _PCT 204#endif // PRODUCT 205 206Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 207 int index) { 208 Thread *thread = get_thread_slow(); 209 if (thread != NULL) { 210 address sp = os::current_stack_pointer(); 211 guarantee(thread->_stack_base == NULL || 212 (sp <= thread->_stack_base && 213 sp >= thread->_stack_base - thread->_stack_size) || 214 is_error_reported(), 215 "sp must be inside of selected thread stack"); 216 217 thread->set_self_raw_id(raw_id); // mark for quick retrieval 218 _get_thread_cache[index] = thread; 219 } 220 return thread; 221} 222 223 224static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0}; 225#define NO_CACHED_THREAD ((Thread*)all_zero) 226 227void ThreadLocalStorage::pd_set_thread(Thread* thread) { 228 229 // Store the new value before updating the cache to prevent a race 230 // between get_thread_via_cache_slowly() and this store operation. 231 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 232 233 // Update thread cache with new thread if setting on thread create, 234 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 235 uintptr_t raw = pd_raw_thread_id(); 236 int ix = pd_cache_index(raw); 237 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 238} 239 240void ThreadLocalStorage::pd_init() { 241 for (int i = 0; i < _pd_cache_size; i++) { 242 _get_thread_cache[i] = NO_CACHED_THREAD; 243 } 244} 245 246// Invalidate all the caches (happens to be the same as pd_init). 247void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 248 249#undef NO_CACHED_THREAD 250 251// END Thread Local Storage 252 253static inline size_t adjust_stack_size(address base, size_t size) { 254 if ((ssize_t)size < 0) { 255 // 4759953: Compensate for ridiculous stack size. 256 size = max_intx; 257 } 258 if (size > (size_t)base) { 259 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 260 size = (size_t)base; 261 } 262 return size; 263} 264 265static inline stack_t get_stack_info() { 266 stack_t st; 267 int retval = thr_stksegment(&st); 268 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 269 assert(retval == 0, "incorrect return value from thr_stksegment"); 270 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 271 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 272 return st; 273} 274 275address os::current_stack_base() { 276 int r = thr_main(); 277 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 278 bool is_primordial_thread = r; 279 280 // Workaround 4352906, avoid calls to thr_stksegment by 281 // thr_main after the first one (it looks like we trash 282 // some data, causing the value for ss_sp to be incorrect). 283 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 284 stack_t st = get_stack_info(); 285 if (is_primordial_thread) { 286 // cache initial value of stack base 287 os::Solaris::_main_stack_base = (address)st.ss_sp; 288 } 289 return (address)st.ss_sp; 290 } else { 291 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 292 return os::Solaris::_main_stack_base; 293 } 294} 295 296size_t os::current_stack_size() { 297 size_t size; 298 299 int r = thr_main(); 300 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 301 if (!r) { 302 size = get_stack_info().ss_size; 303 } else { 304 struct rlimit limits; 305 getrlimit(RLIMIT_STACK, &limits); 306 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 307 } 308 // base may not be page aligned 309 address base = current_stack_base(); 310 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 311 return (size_t)(base - bottom); 312} 313 314struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 315 return localtime_r(clock, res); 316} 317 318void os::Solaris::try_enable_extended_io() { 319 typedef int (*enable_extended_FILE_stdio_t)(int, int); 320 321 if (!UseExtendedFileIO) { 322 return; 323 } 324 325 enable_extended_FILE_stdio_t enabler = 326 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 327 "enable_extended_FILE_stdio"); 328 if (enabler) { 329 enabler(-1, -1); 330 } 331} 332 333static int _processors_online = 0; 334 335jint os::Solaris::_os_thread_limit = 0; 336volatile jint os::Solaris::_os_thread_count = 0; 337 338julong os::available_memory() { 339 return Solaris::available_memory(); 340} 341 342julong os::Solaris::available_memory() { 343 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 344} 345 346julong os::Solaris::_physical_memory = 0; 347 348julong os::physical_memory() { 349 return Solaris::physical_memory(); 350} 351 352static hrtime_t first_hrtime = 0; 353static const hrtime_t hrtime_hz = 1000*1000*1000; 354static volatile hrtime_t max_hrtime = 0; 355 356 357void os::Solaris::initialize_system_info() { 358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 359 _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 361 (julong)sysconf(_SC_PAGESIZE); 362} 363 364int os::active_processor_count() { 365 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 366 pid_t pid = getpid(); 367 psetid_t pset = PS_NONE; 368 // Are we running in a processor set or is there any processor set around? 369 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 370 uint_t pset_cpus; 371 // Query the number of cpus available to us. 372 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 373 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 374 _processors_online = pset_cpus; 375 return pset_cpus; 376 } 377 } 378 // Otherwise return number of online cpus 379 return online_cpus; 380} 381 382static bool find_processors_in_pset(psetid_t pset, 383 processorid_t** id_array, 384 uint_t* id_length) { 385 bool result = false; 386 // Find the number of processors in the processor set. 387 if (pset_info(pset, NULL, id_length, NULL) == 0) { 388 // Make up an array to hold their ids. 389 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 390 // Fill in the array with their processor ids. 391 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 392 result = true; 393 } 394 } 395 return result; 396} 397 398// Callers of find_processors_online() must tolerate imprecise results -- 399// the system configuration can change asynchronously because of DR 400// or explicit psradm operations. 401// 402// We also need to take care that the loop (below) terminates as the 403// number of processors online can change between the _SC_NPROCESSORS_ONLN 404// request and the loop that builds the list of processor ids. Unfortunately 405// there's no reliable way to determine the maximum valid processor id, 406// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 407// man pages, which claim the processor id set is "sparse, but 408// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 409// exit the loop. 410// 411// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 412// not available on S8.0. 413 414static bool find_processors_online(processorid_t** id_array, 415 uint* id_length) { 416 const processorid_t MAX_PROCESSOR_ID = 100000; 417 // Find the number of processors online. 418 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 419 // Make up an array to hold their ids. 420 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 421 // Processors need not be numbered consecutively. 422 long found = 0; 423 processorid_t next = 0; 424 while (found < *id_length && next < MAX_PROCESSOR_ID) { 425 processor_info_t info; 426 if (processor_info(next, &info) == 0) { 427 // NB, PI_NOINTR processors are effectively online ... 428 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 429 (*id_array)[found] = next; 430 found += 1; 431 } 432 } 433 next += 1; 434 } 435 if (found < *id_length) { 436 // The loop above didn't identify the expected number of processors. 437 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 438 // and re-running the loop, above, but there's no guarantee of progress 439 // if the system configuration is in flux. Instead, we just return what 440 // we've got. Note that in the worst case find_processors_online() could 441 // return an empty set. (As a fall-back in the case of the empty set we 442 // could just return the ID of the current processor). 443 *id_length = found; 444 } 445 446 return true; 447} 448 449static bool assign_distribution(processorid_t* id_array, 450 uint id_length, 451 uint* distribution, 452 uint distribution_length) { 453 // We assume we can assign processorid_t's to uint's. 454 assert(sizeof(processorid_t) == sizeof(uint), 455 "can't convert processorid_t to uint"); 456 // Quick check to see if we won't succeed. 457 if (id_length < distribution_length) { 458 return false; 459 } 460 // Assign processor ids to the distribution. 461 // Try to shuffle processors to distribute work across boards, 462 // assuming 4 processors per board. 463 const uint processors_per_board = ProcessDistributionStride; 464 // Find the maximum processor id. 465 processorid_t max_id = 0; 466 for (uint m = 0; m < id_length; m += 1) { 467 max_id = MAX2(max_id, id_array[m]); 468 } 469 // The next id, to limit loops. 470 const processorid_t limit_id = max_id + 1; 471 // Make up markers for available processors. 472 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 473 for (uint c = 0; c < limit_id; c += 1) { 474 available_id[c] = false; 475 } 476 for (uint a = 0; a < id_length; a += 1) { 477 available_id[id_array[a]] = true; 478 } 479 // Step by "boards", then by "slot", copying to "assigned". 480 // NEEDS_CLEANUP: The assignment of processors should be stateful, 481 // remembering which processors have been assigned by 482 // previous calls, etc., so as to distribute several 483 // independent calls of this method. What we'd like is 484 // It would be nice to have an API that let us ask 485 // how many processes are bound to a processor, 486 // but we don't have that, either. 487 // In the short term, "board" is static so that 488 // subsequent distributions don't all start at board 0. 489 static uint board = 0; 490 uint assigned = 0; 491 // Until we've found enough processors .... 492 while (assigned < distribution_length) { 493 // ... find the next available processor in the board. 494 for (uint slot = 0; slot < processors_per_board; slot += 1) { 495 uint try_id = board * processors_per_board + slot; 496 if ((try_id < limit_id) && (available_id[try_id] == true)) { 497 distribution[assigned] = try_id; 498 available_id[try_id] = false; 499 assigned += 1; 500 break; 501 } 502 } 503 board += 1; 504 if (board * processors_per_board + 0 >= limit_id) { 505 board = 0; 506 } 507 } 508 if (available_id != NULL) { 509 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 510 } 511 return true; 512} 513 514void os::set_native_thread_name(const char *name) { 515 // Not yet implemented. 516 return; 517} 518 519bool os::distribute_processes(uint length, uint* distribution) { 520 bool result = false; 521 // Find the processor id's of all the available CPUs. 522 processorid_t* id_array = NULL; 523 uint id_length = 0; 524 // There are some races between querying information and using it, 525 // since processor sets can change dynamically. 526 psetid_t pset = PS_NONE; 527 // Are we running in a processor set? 528 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 529 result = find_processors_in_pset(pset, &id_array, &id_length); 530 } else { 531 result = find_processors_online(&id_array, &id_length); 532 } 533 if (result == true) { 534 if (id_length >= length) { 535 result = assign_distribution(id_array, id_length, distribution, length); 536 } else { 537 result = false; 538 } 539 } 540 if (id_array != NULL) { 541 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 542 } 543 return result; 544} 545 546bool os::bind_to_processor(uint processor_id) { 547 // We assume that a processorid_t can be stored in a uint. 548 assert(sizeof(uint) == sizeof(processorid_t), 549 "can't convert uint to processorid_t"); 550 int bind_result = 551 processor_bind(P_LWPID, // bind LWP. 552 P_MYID, // bind current LWP. 553 (processorid_t) processor_id, // id. 554 NULL); // don't return old binding. 555 return (bind_result == 0); 556} 557 558bool os::getenv(const char* name, char* buffer, int len) { 559 char* val = ::getenv(name); 560 if (val == NULL || strlen(val) + 1 > len) { 561 if (len > 0) buffer[0] = 0; // return a null string 562 return false; 563 } 564 strcpy(buffer, val); 565 return true; 566} 567 568 569// Return true if user is running as root. 570 571bool os::have_special_privileges() { 572 static bool init = false; 573 static bool privileges = false; 574 if (!init) { 575 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 576 init = true; 577 } 578 return privileges; 579} 580 581 582void os::init_system_properties_values() { 583 // The next steps are taken in the product version: 584 // 585 // Obtain the JAVA_HOME value from the location of libjvm.so. 586 // This library should be located at: 587 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 588 // 589 // If "/jre/lib/" appears at the right place in the path, then we 590 // assume libjvm.so is installed in a JDK and we use this path. 591 // 592 // Otherwise exit with message: "Could not create the Java virtual machine." 593 // 594 // The following extra steps are taken in the debugging version: 595 // 596 // If "/jre/lib/" does NOT appear at the right place in the path 597 // instead of exit check for $JAVA_HOME environment variable. 598 // 599 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 600 // then we append a fake suffix "hotspot/libjvm.so" to this path so 601 // it looks like libjvm.so is installed there 602 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 603 // 604 // Otherwise exit. 605 // 606 // Important note: if the location of libjvm.so changes this 607 // code needs to be changed accordingly. 608 609// Base path of extensions installed on the system. 610#define SYS_EXT_DIR "/usr/jdk/packages" 611#define EXTENSIONS_DIR "/lib/ext" 612#define ENDORSED_DIR "/lib/endorsed" 613 614 char cpu_arch[12]; 615 // Buffer that fits several sprintfs. 616 // Note that the space for the colon and the trailing null are provided 617 // by the nulls included by the sizeof operator. 618 const size_t bufsize = 619 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends. 620 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 621 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir 622 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir 623 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 624 625 // sysclasspath, java_home, dll_dir 626 { 627 char *pslash; 628 os::jvm_path(buf, bufsize); 629 630 // Found the full path to libjvm.so. 631 // Now cut the path to <java_home>/jre if we can. 632 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 633 pslash = strrchr(buf, '/'); 634 if (pslash != NULL) { 635 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 636 } 637 Arguments::set_dll_dir(buf); 638 639 if (pslash != NULL) { 640 pslash = strrchr(buf, '/'); 641 if (pslash != NULL) { 642 *pslash = '\0'; // Get rid of /<arch>. 643 pslash = strrchr(buf, '/'); 644 if (pslash != NULL) { 645 *pslash = '\0'; // Get rid of /lib. 646 } 647 } 648 } 649 Arguments::set_java_home(buf); 650 set_boot_path('/', ':'); 651 } 652 653 // Where to look for native libraries. 654 { 655 // Use dlinfo() to determine the correct java.library.path. 656 // 657 // If we're launched by the Java launcher, and the user 658 // does not set java.library.path explicitly on the commandline, 659 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 660 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 661 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 662 // /usr/lib), which is exactly what we want. 663 // 664 // If the user does set java.library.path, it completely 665 // overwrites this setting, and always has. 666 // 667 // If we're not launched by the Java launcher, we may 668 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 669 // settings. Again, dlinfo does exactly what we want. 670 671 Dl_serinfo info_sz, *info = &info_sz; 672 Dl_serpath *path; 673 char *library_path; 674 char *common_path = buf; 675 676 // Determine search path count and required buffer size. 677 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 678 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 679 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 680 } 681 682 // Allocate new buffer and initialize. 683 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 684 info->dls_size = info_sz.dls_size; 685 info->dls_cnt = info_sz.dls_cnt; 686 687 // Obtain search path information. 688 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 689 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 690 FREE_C_HEAP_ARRAY(char, info, mtInternal); 691 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 692 } 693 694 path = &info->dls_serpath[0]; 695 696 // Note: Due to a legacy implementation, most of the library path 697 // is set in the launcher. This was to accomodate linking restrictions 698 // on legacy Solaris implementations (which are no longer supported). 699 // Eventually, all the library path setting will be done here. 700 // 701 // However, to prevent the proliferation of improperly built native 702 // libraries, the new path component /usr/jdk/packages is added here. 703 704 // Determine the actual CPU architecture. 705 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 706#ifdef _LP64 707 // If we are a 64-bit vm, perform the following translations: 708 // sparc -> sparcv9 709 // i386 -> amd64 710 if (strcmp(cpu_arch, "sparc") == 0) { 711 strcat(cpu_arch, "v9"); 712 } else if (strcmp(cpu_arch, "i386") == 0) { 713 strcpy(cpu_arch, "amd64"); 714 } 715#endif 716 717 // Construct the invariant part of ld_library_path. 718 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 719 720 // Struct size is more than sufficient for the path components obtained 721 // through the dlinfo() call, so only add additional space for the path 722 // components explicitly added here. 723 size_t library_path_size = info->dls_size + strlen(common_path); 724 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 725 library_path[0] = '\0'; 726 727 // Construct the desired Java library path from the linker's library 728 // search path. 729 // 730 // For compatibility, it is optimal that we insert the additional path 731 // components specific to the Java VM after those components specified 732 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 733 // infrastructure. 734 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 735 strcpy(library_path, common_path); 736 } else { 737 int inserted = 0; 738 int i; 739 for (i = 0; i < info->dls_cnt; i++, path++) { 740 uint_t flags = path->dls_flags & LA_SER_MASK; 741 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 742 strcat(library_path, common_path); 743 strcat(library_path, os::path_separator()); 744 inserted = 1; 745 } 746 strcat(library_path, path->dls_name); 747 strcat(library_path, os::path_separator()); 748 } 749 // Eliminate trailing path separator. 750 library_path[strlen(library_path)-1] = '\0'; 751 } 752 753 // happens before argument parsing - can't use a trace flag 754 // tty->print_raw("init_system_properties_values: native lib path: "); 755 // tty->print_raw_cr(library_path); 756 757 // Callee copies into its own buffer. 758 Arguments::set_library_path(library_path); 759 760 FREE_C_HEAP_ARRAY(char, library_path, mtInternal); 761 FREE_C_HEAP_ARRAY(char, info, mtInternal); 762 } 763 764 // Extensions directories. 765 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 766 Arguments::set_ext_dirs(buf); 767 768 // Endorsed standards default directory. 769 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 770 Arguments::set_endorsed_dirs(buf); 771 772 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 773 774#undef SYS_EXT_DIR 775#undef EXTENSIONS_DIR 776#undef ENDORSED_DIR 777} 778 779void os::breakpoint() { 780 BREAKPOINT; 781} 782 783bool os::obsolete_option(const JavaVMOption *option) { 784 if (!strncmp(option->optionString, "-Xt", 3)) { 785 return true; 786 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 787 return true; 788 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 789 return true; 790 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 791 return true; 792 } 793 return false; 794} 795 796bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 797 address stackStart = (address)thread->stack_base(); 798 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 799 if (sp < stackStart && sp >= stackEnd) return true; 800 return false; 801} 802 803extern "C" void breakpoint() { 804 // use debugger to set breakpoint here 805} 806 807static thread_t main_thread; 808 809// Thread start routine for all new Java threads 810extern "C" void* java_start(void* thread_addr) { 811 // Try to randomize the cache line index of hot stack frames. 812 // This helps when threads of the same stack traces evict each other's 813 // cache lines. The threads can be either from the same JVM instance, or 814 // from different JVM instances. The benefit is especially true for 815 // processors with hyperthreading technology. 816 static int counter = 0; 817 int pid = os::current_process_id(); 818 alloca(((pid ^ counter++) & 7) * 128); 819 820 int prio; 821 Thread* thread = (Thread*)thread_addr; 822 OSThread* osthr = thread->osthread(); 823 824 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 825 thread->_schedctl = (void *) schedctl_init(); 826 827 if (UseNUMA) { 828 int lgrp_id = os::numa_get_group_id(); 829 if (lgrp_id != -1) { 830 thread->set_lgrp_id(lgrp_id); 831 } 832 } 833 834 // If the creator called set priority before we started, 835 // we need to call set_native_priority now that we have an lwp. 836 // We used to get the priority from thr_getprio (we called 837 // thr_setprio way back in create_thread) and pass it to 838 // set_native_priority, but Solaris scales the priority 839 // in java_to_os_priority, so when we read it back here, 840 // we pass trash to set_native_priority instead of what's 841 // in java_to_os_priority. So we save the native priority 842 // in the osThread and recall it here. 843 844 if (osthr->thread_id() != -1) { 845 if (UseThreadPriorities) { 846 int prio = osthr->native_priority(); 847 if (ThreadPriorityVerbose) { 848 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 849 INTPTR_FORMAT ", setting priority: %d\n", 850 osthr->thread_id(), osthr->lwp_id(), prio); 851 } 852 os::set_native_priority(thread, prio); 853 } 854 } else if (ThreadPriorityVerbose) { 855 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 856 } 857 858 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 859 860 // initialize signal mask for this thread 861 os::Solaris::hotspot_sigmask(thread); 862 863 thread->run(); 864 865 // One less thread is executing 866 // When the VMThread gets here, the main thread may have already exited 867 // which frees the CodeHeap containing the Atomic::dec code 868 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 869 Atomic::dec(&os::Solaris::_os_thread_count); 870 } 871 872 if (UseDetachedThreads) { 873 thr_exit(NULL); 874 ShouldNotReachHere(); 875 } 876 return NULL; 877} 878 879static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 880 // Allocate the OSThread object 881 OSThread* osthread = new OSThread(NULL, NULL); 882 if (osthread == NULL) return NULL; 883 884 // Store info on the Solaris thread into the OSThread 885 osthread->set_thread_id(thread_id); 886 osthread->set_lwp_id(_lwp_self()); 887 thread->_schedctl = (void *) schedctl_init(); 888 889 if (UseNUMA) { 890 int lgrp_id = os::numa_get_group_id(); 891 if (lgrp_id != -1) { 892 thread->set_lgrp_id(lgrp_id); 893 } 894 } 895 896 if (ThreadPriorityVerbose) { 897 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 898 osthread->thread_id(), osthread->lwp_id()); 899 } 900 901 // Initial thread state is INITIALIZED, not SUSPENDED 902 osthread->set_state(INITIALIZED); 903 904 return osthread; 905} 906 907void os::Solaris::hotspot_sigmask(Thread* thread) { 908 //Save caller's signal mask 909 sigset_t sigmask; 910 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 911 OSThread *osthread = thread->osthread(); 912 osthread->set_caller_sigmask(sigmask); 913 914 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 915 if (!ReduceSignalUsage) { 916 if (thread->is_VM_thread()) { 917 // Only the VM thread handles BREAK_SIGNAL ... 918 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 919 } else { 920 // ... all other threads block BREAK_SIGNAL 921 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 922 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 923 } 924 } 925} 926 927bool os::create_attached_thread(JavaThread* thread) { 928#ifdef ASSERT 929 thread->verify_not_published(); 930#endif 931 OSThread* osthread = create_os_thread(thread, thr_self()); 932 if (osthread == NULL) { 933 return false; 934 } 935 936 // Initial thread state is RUNNABLE 937 osthread->set_state(RUNNABLE); 938 thread->set_osthread(osthread); 939 940 // initialize signal mask for this thread 941 // and save the caller's signal mask 942 os::Solaris::hotspot_sigmask(thread); 943 944 return true; 945} 946 947bool os::create_main_thread(JavaThread* thread) { 948#ifdef ASSERT 949 thread->verify_not_published(); 950#endif 951 if (_starting_thread == NULL) { 952 _starting_thread = create_os_thread(thread, main_thread); 953 if (_starting_thread == NULL) { 954 return false; 955 } 956 } 957 958 // The primodial thread is runnable from the start 959 _starting_thread->set_state(RUNNABLE); 960 961 thread->set_osthread(_starting_thread); 962 963 // initialize signal mask for this thread 964 // and save the caller's signal mask 965 os::Solaris::hotspot_sigmask(thread); 966 967 return true; 968} 969 970 971bool os::create_thread(Thread* thread, ThreadType thr_type, 972 size_t stack_size) { 973 // Allocate the OSThread object 974 OSThread* osthread = new OSThread(NULL, NULL); 975 if (osthread == NULL) { 976 return false; 977 } 978 979 if (ThreadPriorityVerbose) { 980 char *thrtyp; 981 switch (thr_type) { 982 case vm_thread: 983 thrtyp = (char *)"vm"; 984 break; 985 case cgc_thread: 986 thrtyp = (char *)"cgc"; 987 break; 988 case pgc_thread: 989 thrtyp = (char *)"pgc"; 990 break; 991 case java_thread: 992 thrtyp = (char *)"java"; 993 break; 994 case compiler_thread: 995 thrtyp = (char *)"compiler"; 996 break; 997 case watcher_thread: 998 thrtyp = (char *)"watcher"; 999 break; 1000 default: 1001 thrtyp = (char *)"unknown"; 1002 break; 1003 } 1004 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1005 } 1006 1007 // Calculate stack size if it's not specified by caller. 1008 if (stack_size == 0) { 1009 // The default stack size 1M (2M for LP64). 1010 stack_size = (BytesPerWord >> 2) * K * K; 1011 1012 switch (thr_type) { 1013 case os::java_thread: 1014 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1015 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1016 break; 1017 case os::compiler_thread: 1018 if (CompilerThreadStackSize > 0) { 1019 stack_size = (size_t)(CompilerThreadStackSize * K); 1020 break; 1021 } // else fall through: 1022 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1023 case os::vm_thread: 1024 case os::pgc_thread: 1025 case os::cgc_thread: 1026 case os::watcher_thread: 1027 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1028 break; 1029 } 1030 } 1031 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1032 1033 // Initial state is ALLOCATED but not INITIALIZED 1034 osthread->set_state(ALLOCATED); 1035 1036 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1037 // We got lots of threads. Check if we still have some address space left. 1038 // Need to be at least 5Mb of unreserved address space. We do check by 1039 // trying to reserve some. 1040 const size_t VirtualMemoryBangSize = 20*K*K; 1041 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1042 if (mem == NULL) { 1043 delete osthread; 1044 return false; 1045 } else { 1046 // Release the memory again 1047 os::release_memory(mem, VirtualMemoryBangSize); 1048 } 1049 } 1050 1051 // Setup osthread because the child thread may need it. 1052 thread->set_osthread(osthread); 1053 1054 // Create the Solaris thread 1055 thread_t tid = 0; 1056 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 1057 int status; 1058 1059 // Mark that we don't have an lwp or thread id yet. 1060 // In case we attempt to set the priority before the thread starts. 1061 osthread->set_lwp_id(-1); 1062 osthread->set_thread_id(-1); 1063 1064 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1065 if (status != 0) { 1066 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1067 perror("os::create_thread"); 1068 } 1069 thread->set_osthread(NULL); 1070 // Need to clean up stuff we've allocated so far 1071 delete osthread; 1072 return false; 1073 } 1074 1075 Atomic::inc(&os::Solaris::_os_thread_count); 1076 1077 // Store info on the Solaris thread into the OSThread 1078 osthread->set_thread_id(tid); 1079 1080 // Remember that we created this thread so we can set priority on it 1081 osthread->set_vm_created(); 1082 1083 // Initial thread state is INITIALIZED, not SUSPENDED 1084 osthread->set_state(INITIALIZED); 1085 1086 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1087 return true; 1088} 1089 1090// defined for >= Solaris 10. This allows builds on earlier versions 1091// of Solaris to take advantage of the newly reserved Solaris JVM signals 1092// With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1093// and -XX:+UseAltSigs does nothing since these should have no conflict 1094// 1095#if !defined(SIGJVM1) 1096 #define SIGJVM1 39 1097 #define SIGJVM2 40 1098#endif 1099 1100debug_only(static bool signal_sets_initialized = false); 1101static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1102int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1103int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1104 1105bool os::Solaris::is_sig_ignored(int sig) { 1106 struct sigaction oact; 1107 sigaction(sig, (struct sigaction*)NULL, &oact); 1108 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1109 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1110 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1111 return true; 1112 } else { 1113 return false; 1114 } 1115} 1116 1117// Note: SIGRTMIN is a macro that calls sysconf() so it will 1118// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1119static bool isJVM1available() { 1120 return SIGJVM1 < SIGRTMIN; 1121} 1122 1123void os::Solaris::signal_sets_init() { 1124 // Should also have an assertion stating we are still single-threaded. 1125 assert(!signal_sets_initialized, "Already initialized"); 1126 // Fill in signals that are necessarily unblocked for all threads in 1127 // the VM. Currently, we unblock the following signals: 1128 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1129 // by -Xrs (=ReduceSignalUsage)); 1130 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1131 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1132 // the dispositions or masks wrt these signals. 1133 // Programs embedding the VM that want to use the above signals for their 1134 // own purposes must, at this time, use the "-Xrs" option to prevent 1135 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1136 // (See bug 4345157, and other related bugs). 1137 // In reality, though, unblocking these signals is really a nop, since 1138 // these signals are not blocked by default. 1139 sigemptyset(&unblocked_sigs); 1140 sigemptyset(&allowdebug_blocked_sigs); 1141 sigaddset(&unblocked_sigs, SIGILL); 1142 sigaddset(&unblocked_sigs, SIGSEGV); 1143 sigaddset(&unblocked_sigs, SIGBUS); 1144 sigaddset(&unblocked_sigs, SIGFPE); 1145 1146 if (isJVM1available) { 1147 os::Solaris::set_SIGinterrupt(SIGJVM1); 1148 os::Solaris::set_SIGasync(SIGJVM2); 1149 } else if (UseAltSigs) { 1150 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1151 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1152 } else { 1153 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1154 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1155 } 1156 1157 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1158 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1159 1160 if (!ReduceSignalUsage) { 1161 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1162 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1163 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1164 } 1165 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1166 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1167 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1168 } 1169 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1170 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1171 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1172 } 1173 } 1174 // Fill in signals that are blocked by all but the VM thread. 1175 sigemptyset(&vm_sigs); 1176 if (!ReduceSignalUsage) { 1177 sigaddset(&vm_sigs, BREAK_SIGNAL); 1178 } 1179 debug_only(signal_sets_initialized = true); 1180 1181 // For diagnostics only used in run_periodic_checks 1182 sigemptyset(&check_signal_done); 1183} 1184 1185// These are signals that are unblocked while a thread is running Java. 1186// (For some reason, they get blocked by default.) 1187sigset_t* os::Solaris::unblocked_signals() { 1188 assert(signal_sets_initialized, "Not initialized"); 1189 return &unblocked_sigs; 1190} 1191 1192// These are the signals that are blocked while a (non-VM) thread is 1193// running Java. Only the VM thread handles these signals. 1194sigset_t* os::Solaris::vm_signals() { 1195 assert(signal_sets_initialized, "Not initialized"); 1196 return &vm_sigs; 1197} 1198 1199// These are signals that are blocked during cond_wait to allow debugger in 1200sigset_t* os::Solaris::allowdebug_blocked_signals() { 1201 assert(signal_sets_initialized, "Not initialized"); 1202 return &allowdebug_blocked_sigs; 1203} 1204 1205 1206void _handle_uncaught_cxx_exception() { 1207 VMError err("An uncaught C++ exception"); 1208 err.report_and_die(); 1209} 1210 1211 1212// First crack at OS-specific initialization, from inside the new thread. 1213void os::initialize_thread(Thread* thr) { 1214 int r = thr_main(); 1215 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1216 if (r) { 1217 JavaThread* jt = (JavaThread *)thr; 1218 assert(jt != NULL, "Sanity check"); 1219 size_t stack_size; 1220 address base = jt->stack_base(); 1221 if (Arguments::created_by_java_launcher()) { 1222 // Use 2MB to allow for Solaris 7 64 bit mode. 1223 stack_size = JavaThread::stack_size_at_create() == 0 1224 ? 2048*K : JavaThread::stack_size_at_create(); 1225 1226 // There are rare cases when we may have already used more than 1227 // the basic stack size allotment before this method is invoked. 1228 // Attempt to allow for a normally sized java_stack. 1229 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1230 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1231 } else { 1232 // 6269555: If we were not created by a Java launcher, i.e. if we are 1233 // running embedded in a native application, treat the primordial thread 1234 // as much like a native attached thread as possible. This means using 1235 // the current stack size from thr_stksegment(), unless it is too large 1236 // to reliably setup guard pages. A reasonable max size is 8MB. 1237 size_t current_size = current_stack_size(); 1238 // This should never happen, but just in case.... 1239 if (current_size == 0) current_size = 2 * K * K; 1240 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1241 } 1242 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1243 stack_size = (size_t)(base - bottom); 1244 1245 assert(stack_size > 0, "Stack size calculation problem"); 1246 1247 if (stack_size > jt->stack_size()) { 1248#ifndef PRODUCT 1249 struct rlimit limits; 1250 getrlimit(RLIMIT_STACK, &limits); 1251 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1252 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1253#endif 1254 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1255 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1256 "See limit(1) to increase the stack size limit.", 1257 stack_size / K, jt->stack_size() / K); 1258 vm_exit(1); 1259 } 1260 assert(jt->stack_size() >= stack_size, 1261 "Attempt to map more stack than was allocated"); 1262 jt->set_stack_size(stack_size); 1263 } 1264 1265 // With the T2 libthread (T1 is no longer supported) threads are always bound 1266 // and we use stackbanging in all cases. 1267 1268 os::Solaris::init_thread_fpu_state(); 1269 std::set_terminate(_handle_uncaught_cxx_exception); 1270} 1271 1272 1273 1274// Free Solaris resources related to the OSThread 1275void os::free_thread(OSThread* osthread) { 1276 assert(osthread != NULL, "os::free_thread but osthread not set"); 1277 1278 1279 // We are told to free resources of the argument thread, 1280 // but we can only really operate on the current thread. 1281 // The main thread must take the VMThread down synchronously 1282 // before the main thread exits and frees up CodeHeap 1283 guarantee((Thread::current()->osthread() == osthread 1284 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1285 if (Thread::current()->osthread() == osthread) { 1286 // Restore caller's signal mask 1287 sigset_t sigmask = osthread->caller_sigmask(); 1288 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1289 } 1290 delete osthread; 1291} 1292 1293void os::pd_start_thread(Thread* thread) { 1294 int status = thr_continue(thread->osthread()->thread_id()); 1295 assert_status(status == 0, status, "thr_continue failed"); 1296} 1297 1298 1299intx os::current_thread_id() { 1300 return (intx)thr_self(); 1301} 1302 1303static pid_t _initial_pid = 0; 1304 1305int os::current_process_id() { 1306 return (int)(_initial_pid ? _initial_pid : getpid()); 1307} 1308 1309int os::allocate_thread_local_storage() { 1310 // %%% in Win32 this allocates a memory segment pointed to by a 1311 // register. Dan Stein can implement a similar feature in 1312 // Solaris. Alternatively, the VM can do the same thing 1313 // explicitly: malloc some storage and keep the pointer in a 1314 // register (which is part of the thread's context) (or keep it 1315 // in TLS). 1316 // %%% In current versions of Solaris, thr_self and TSD can 1317 // be accessed via short sequences of displaced indirections. 1318 // The value of thr_self is available as %g7(36). 1319 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1320 // assuming that the current thread already has a value bound to k. 1321 // It may be worth experimenting with such access patterns, 1322 // and later having the parameters formally exported from a Solaris 1323 // interface. I think, however, that it will be faster to 1324 // maintain the invariant that %g2 always contains the 1325 // JavaThread in Java code, and have stubs simply 1326 // treat %g2 as a caller-save register, preserving it in a %lN. 1327 thread_key_t tk; 1328 if (thr_keycreate(&tk, NULL)) { 1329 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1330 "(%s)", strerror(errno))); 1331 } 1332 return int(tk); 1333} 1334 1335void os::free_thread_local_storage(int index) { 1336 // %%% don't think we need anything here 1337 // if (pthread_key_delete((pthread_key_t) tk)) { 1338 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1339 // } 1340} 1341 1342// libthread allocate for tsd_common is a version specific 1343// small number - point is NO swap space available 1344#define SMALLINT 32 1345void os::thread_local_storage_at_put(int index, void* value) { 1346 // %%% this is used only in threadLocalStorage.cpp 1347 if (thr_setspecific((thread_key_t)index, value)) { 1348 if (errno == ENOMEM) { 1349 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR, 1350 "thr_setspecific: out of swap space"); 1351 } else { 1352 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1353 "(%s)", strerror(errno))); 1354 } 1355 } else { 1356 ThreadLocalStorage::set_thread_in_slot((Thread *) value); 1357 } 1358} 1359 1360// This function could be called before TLS is initialized, for example, when 1361// VM receives an async signal or when VM causes a fatal error during 1362// initialization. Return NULL if thr_getspecific() fails. 1363void* os::thread_local_storage_at(int index) { 1364 // %%% this is used only in threadLocalStorage.cpp 1365 void* r = NULL; 1366 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1367} 1368 1369 1370// gethrtime() should be monotonic according to the documentation, 1371// but some virtualized platforms are known to break this guarantee. 1372// getTimeNanos() must be guaranteed not to move backwards, so we 1373// are forced to add a check here. 1374inline hrtime_t getTimeNanos() { 1375 const hrtime_t now = gethrtime(); 1376 const hrtime_t prev = max_hrtime; 1377 if (now <= prev) { 1378 return prev; // same or retrograde time; 1379 } 1380 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1381 assert(obsv >= prev, "invariant"); // Monotonicity 1382 // If the CAS succeeded then we're done and return "now". 1383 // If the CAS failed and the observed value "obsv" is >= now then 1384 // we should return "obsv". If the CAS failed and now > obsv > prv then 1385 // some other thread raced this thread and installed a new value, in which case 1386 // we could either (a) retry the entire operation, (b) retry trying to install now 1387 // or (c) just return obsv. We use (c). No loop is required although in some cases 1388 // we might discard a higher "now" value in deference to a slightly lower but freshly 1389 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1390 // to (a) or (b) -- and greatly reduces coherence traffic. 1391 // We might also condition (c) on the magnitude of the delta between obsv and now. 1392 // Avoiding excessive CAS operations to hot RW locations is critical. 1393 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1394 return (prev == obsv) ? now : obsv; 1395} 1396 1397// Time since start-up in seconds to a fine granularity. 1398// Used by VMSelfDestructTimer and the MemProfiler. 1399double os::elapsedTime() { 1400 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1401} 1402 1403jlong os::elapsed_counter() { 1404 return (jlong)(getTimeNanos() - first_hrtime); 1405} 1406 1407jlong os::elapsed_frequency() { 1408 return hrtime_hz; 1409} 1410 1411// Return the real, user, and system times in seconds from an 1412// arbitrary fixed point in the past. 1413bool os::getTimesSecs(double* process_real_time, 1414 double* process_user_time, 1415 double* process_system_time) { 1416 struct tms ticks; 1417 clock_t real_ticks = times(&ticks); 1418 1419 if (real_ticks == (clock_t) (-1)) { 1420 return false; 1421 } else { 1422 double ticks_per_second = (double) clock_tics_per_sec; 1423 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1424 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1425 // For consistency return the real time from getTimeNanos() 1426 // converted to seconds. 1427 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1428 1429 return true; 1430 } 1431} 1432 1433bool os::supports_vtime() { return true; } 1434 1435bool os::enable_vtime() { 1436 int fd = ::open("/proc/self/ctl", O_WRONLY); 1437 if (fd == -1) { 1438 return false; 1439 } 1440 1441 long cmd[] = { PCSET, PR_MSACCT }; 1442 int res = ::write(fd, cmd, sizeof(long) * 2); 1443 ::close(fd); 1444 if (res != sizeof(long) * 2) { 1445 return false; 1446 } 1447 return true; 1448} 1449 1450bool os::vtime_enabled() { 1451 int fd = ::open("/proc/self/status", O_RDONLY); 1452 if (fd == -1) { 1453 return false; 1454 } 1455 1456 pstatus_t status; 1457 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1458 ::close(fd); 1459 if (res != sizeof(pstatus_t)) { 1460 return false; 1461 } 1462 return status.pr_flags & PR_MSACCT; 1463} 1464 1465double os::elapsedVTime() { 1466 return (double)gethrvtime() / (double)hrtime_hz; 1467} 1468 1469// Used internally for comparisons only 1470// getTimeMillis guaranteed to not move backwards on Solaris 1471jlong getTimeMillis() { 1472 jlong nanotime = getTimeNanos(); 1473 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1474} 1475 1476// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1477jlong os::javaTimeMillis() { 1478 timeval t; 1479 if (gettimeofday(&t, NULL) == -1) { 1480 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1481 } 1482 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1483} 1484 1485jlong os::javaTimeNanos() { 1486 return (jlong)getTimeNanos(); 1487} 1488 1489void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1490 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1491 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1492 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1493 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1494} 1495 1496char * os::local_time_string(char *buf, size_t buflen) { 1497 struct tm t; 1498 time_t long_time; 1499 time(&long_time); 1500 localtime_r(&long_time, &t); 1501 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1502 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1503 t.tm_hour, t.tm_min, t.tm_sec); 1504 return buf; 1505} 1506 1507// Note: os::shutdown() might be called very early during initialization, or 1508// called from signal handler. Before adding something to os::shutdown(), make 1509// sure it is async-safe and can handle partially initialized VM. 1510void os::shutdown() { 1511 1512 // allow PerfMemory to attempt cleanup of any persistent resources 1513 perfMemory_exit(); 1514 1515 // needs to remove object in file system 1516 AttachListener::abort(); 1517 1518 // flush buffered output, finish log files 1519 ostream_abort(); 1520 1521 // Check for abort hook 1522 abort_hook_t abort_hook = Arguments::abort_hook(); 1523 if (abort_hook != NULL) { 1524 abort_hook(); 1525 } 1526} 1527 1528// Note: os::abort() might be called very early during initialization, or 1529// called from signal handler. Before adding something to os::abort(), make 1530// sure it is async-safe and can handle partially initialized VM. 1531void os::abort(bool dump_core) { 1532 os::shutdown(); 1533 if (dump_core) { 1534#ifndef PRODUCT 1535 fdStream out(defaultStream::output_fd()); 1536 out.print_raw("Current thread is "); 1537 char buf[16]; 1538 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1539 out.print_raw_cr(buf); 1540 out.print_raw_cr("Dumping core ..."); 1541#endif 1542 ::abort(); // dump core (for debugging) 1543 } 1544 1545 ::exit(1); 1546} 1547 1548// Die immediately, no exit hook, no abort hook, no cleanup. 1549void os::die() { 1550 ::abort(); // dump core (for debugging) 1551} 1552 1553// DLL functions 1554 1555const char* os::dll_file_extension() { return ".so"; } 1556 1557// This must be hard coded because it's the system's temporary 1558// directory not the java application's temp directory, ala java.io.tmpdir. 1559const char* os::get_temp_directory() { return "/tmp"; } 1560 1561static bool file_exists(const char* filename) { 1562 struct stat statbuf; 1563 if (filename == NULL || strlen(filename) == 0) { 1564 return false; 1565 } 1566 return os::stat(filename, &statbuf) == 0; 1567} 1568 1569bool os::dll_build_name(char* buffer, size_t buflen, 1570 const char* pname, const char* fname) { 1571 bool retval = false; 1572 const size_t pnamelen = pname ? strlen(pname) : 0; 1573 1574 // Return error on buffer overflow. 1575 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1576 return retval; 1577 } 1578 1579 if (pnamelen == 0) { 1580 snprintf(buffer, buflen, "lib%s.so", fname); 1581 retval = true; 1582 } else if (strchr(pname, *os::path_separator()) != NULL) { 1583 int n; 1584 char** pelements = split_path(pname, &n); 1585 if (pelements == NULL) { 1586 return false; 1587 } 1588 for (int i = 0; i < n; i++) { 1589 // really shouldn't be NULL but what the heck, check can't hurt 1590 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1591 continue; // skip the empty path values 1592 } 1593 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1594 if (file_exists(buffer)) { 1595 retval = true; 1596 break; 1597 } 1598 } 1599 // release the storage 1600 for (int i = 0; i < n; i++) { 1601 if (pelements[i] != NULL) { 1602 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1603 } 1604 } 1605 if (pelements != NULL) { 1606 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1607 } 1608 } else { 1609 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1610 retval = true; 1611 } 1612 return retval; 1613} 1614 1615// check if addr is inside libjvm.so 1616bool os::address_is_in_vm(address addr) { 1617 static address libjvm_base_addr; 1618 Dl_info dlinfo; 1619 1620 if (libjvm_base_addr == NULL) { 1621 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1622 libjvm_base_addr = (address)dlinfo.dli_fbase; 1623 } 1624 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1625 } 1626 1627 if (dladdr((void *)addr, &dlinfo) != 0) { 1628 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1629 } 1630 1631 return false; 1632} 1633 1634typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1635static dladdr1_func_type dladdr1_func = NULL; 1636 1637bool os::dll_address_to_function_name(address addr, char *buf, 1638 int buflen, int * offset) { 1639 // buf is not optional, but offset is optional 1640 assert(buf != NULL, "sanity check"); 1641 1642 Dl_info dlinfo; 1643 1644 // dladdr1_func was initialized in os::init() 1645 if (dladdr1_func != NULL) { 1646 // yes, we have dladdr1 1647 1648 // Support for dladdr1 is checked at runtime; it may be 1649 // available even if the vm is built on a machine that does 1650 // not have dladdr1 support. Make sure there is a value for 1651 // RTLD_DL_SYMENT. 1652#ifndef RTLD_DL_SYMENT 1653 #define RTLD_DL_SYMENT 1 1654#endif 1655#ifdef _LP64 1656 Elf64_Sym * info; 1657#else 1658 Elf32_Sym * info; 1659#endif 1660 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1661 RTLD_DL_SYMENT) != 0) { 1662 // see if we have a matching symbol that covers our address 1663 if (dlinfo.dli_saddr != NULL && 1664 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1665 if (dlinfo.dli_sname != NULL) { 1666 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1667 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1668 } 1669 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1670 return true; 1671 } 1672 } 1673 // no matching symbol so try for just file info 1674 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1675 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1676 buf, buflen, offset, dlinfo.dli_fname)) { 1677 return true; 1678 } 1679 } 1680 } 1681 buf[0] = '\0'; 1682 if (offset != NULL) *offset = -1; 1683 return false; 1684 } 1685 1686 // no, only dladdr is available 1687 if (dladdr((void *)addr, &dlinfo) != 0) { 1688 // see if we have a matching symbol 1689 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1690 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1691 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1692 } 1693 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1694 return true; 1695 } 1696 // no matching symbol so try for just file info 1697 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1698 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1699 buf, buflen, offset, dlinfo.dli_fname)) { 1700 return true; 1701 } 1702 } 1703 } 1704 buf[0] = '\0'; 1705 if (offset != NULL) *offset = -1; 1706 return false; 1707} 1708 1709bool os::dll_address_to_library_name(address addr, char* buf, 1710 int buflen, int* offset) { 1711 // buf is not optional, but offset is optional 1712 assert(buf != NULL, "sanity check"); 1713 1714 Dl_info dlinfo; 1715 1716 if (dladdr((void*)addr, &dlinfo) != 0) { 1717 if (dlinfo.dli_fname != NULL) { 1718 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1719 } 1720 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1721 *offset = addr - (address)dlinfo.dli_fbase; 1722 } 1723 return true; 1724 } 1725 1726 buf[0] = '\0'; 1727 if (offset) *offset = -1; 1728 return false; 1729} 1730 1731int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1732 Dl_info dli; 1733 // Sanity check? 1734 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1735 dli.dli_fname == NULL) { 1736 return 1; 1737 } 1738 1739 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1740 if (handle == NULL) { 1741 return 1; 1742 } 1743 1744 Link_map *map; 1745 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1746 if (map == NULL) { 1747 dlclose(handle); 1748 return 1; 1749 } 1750 1751 while (map->l_prev != NULL) { 1752 map = map->l_prev; 1753 } 1754 1755 while (map != NULL) { 1756 // Iterate through all map entries and call callback with fields of interest 1757 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1758 dlclose(handle); 1759 return 1; 1760 } 1761 map = map->l_next; 1762 } 1763 1764 dlclose(handle); 1765 return 0; 1766} 1767 1768int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1769 outputStream * out = (outputStream *) param; 1770 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1771 return 0; 1772} 1773 1774void os::print_dll_info(outputStream * st) { 1775 st->print_cr("Dynamic libraries:"); st->flush(); 1776 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1777 st->print_cr("Error: Cannot print dynamic libraries."); 1778 } 1779} 1780 1781// Loads .dll/.so and 1782// in case of error it checks if .dll/.so was built for the 1783// same architecture as Hotspot is running on 1784 1785void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1786 void * result= ::dlopen(filename, RTLD_LAZY); 1787 if (result != NULL) { 1788 // Successful loading 1789 return result; 1790 } 1791 1792 Elf32_Ehdr elf_head; 1793 1794 // Read system error message into ebuf 1795 // It may or may not be overwritten below 1796 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1797 ebuf[ebuflen-1]='\0'; 1798 int diag_msg_max_length=ebuflen-strlen(ebuf); 1799 char* diag_msg_buf=ebuf+strlen(ebuf); 1800 1801 if (diag_msg_max_length==0) { 1802 // No more space in ebuf for additional diagnostics message 1803 return NULL; 1804 } 1805 1806 1807 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1808 1809 if (file_descriptor < 0) { 1810 // Can't open library, report dlerror() message 1811 return NULL; 1812 } 1813 1814 bool failed_to_read_elf_head= 1815 (sizeof(elf_head)!= 1816 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1817 1818 ::close(file_descriptor); 1819 if (failed_to_read_elf_head) { 1820 // file i/o error - report dlerror() msg 1821 return NULL; 1822 } 1823 1824 typedef struct { 1825 Elf32_Half code; // Actual value as defined in elf.h 1826 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1827 char elf_class; // 32 or 64 bit 1828 char endianess; // MSB or LSB 1829 char* name; // String representation 1830 } arch_t; 1831 1832 static const arch_t arch_array[]={ 1833 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1834 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1835 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1836 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1837 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1838 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1839 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1840 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1841 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1842 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1843 }; 1844 1845#if (defined IA32) 1846 static Elf32_Half running_arch_code=EM_386; 1847#elif (defined AMD64) 1848 static Elf32_Half running_arch_code=EM_X86_64; 1849#elif (defined IA64) 1850 static Elf32_Half running_arch_code=EM_IA_64; 1851#elif (defined __sparc) && (defined _LP64) 1852 static Elf32_Half running_arch_code=EM_SPARCV9; 1853#elif (defined __sparc) && (!defined _LP64) 1854 static Elf32_Half running_arch_code=EM_SPARC; 1855#elif (defined __powerpc64__) 1856 static Elf32_Half running_arch_code=EM_PPC64; 1857#elif (defined __powerpc__) 1858 static Elf32_Half running_arch_code=EM_PPC; 1859#elif (defined ARM) 1860 static Elf32_Half running_arch_code=EM_ARM; 1861#else 1862 #error Method os::dll_load requires that one of following is defined:\ 1863 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1864#endif 1865 1866 // Identify compatability class for VM's architecture and library's architecture 1867 // Obtain string descriptions for architectures 1868 1869 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1870 int running_arch_index=-1; 1871 1872 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1873 if (running_arch_code == arch_array[i].code) { 1874 running_arch_index = i; 1875 } 1876 if (lib_arch.code == arch_array[i].code) { 1877 lib_arch.compat_class = arch_array[i].compat_class; 1878 lib_arch.name = arch_array[i].name; 1879 } 1880 } 1881 1882 assert(running_arch_index != -1, 1883 "Didn't find running architecture code (running_arch_code) in arch_array"); 1884 if (running_arch_index == -1) { 1885 // Even though running architecture detection failed 1886 // we may still continue with reporting dlerror() message 1887 return NULL; 1888 } 1889 1890 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1891 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1892 return NULL; 1893 } 1894 1895 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1896 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1897 return NULL; 1898 } 1899 1900 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1901 if (lib_arch.name!=NULL) { 1902 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1903 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1904 lib_arch.name, arch_array[running_arch_index].name); 1905 } else { 1906 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1907 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1908 lib_arch.code, 1909 arch_array[running_arch_index].name); 1910 } 1911 } 1912 1913 return NULL; 1914} 1915 1916void* os::dll_lookup(void* handle, const char* name) { 1917 return dlsym(handle, name); 1918} 1919 1920void* os::get_default_process_handle() { 1921 return (void*)::dlopen(NULL, RTLD_LAZY); 1922} 1923 1924int os::stat(const char *path, struct stat *sbuf) { 1925 char pathbuf[MAX_PATH]; 1926 if (strlen(path) > MAX_PATH - 1) { 1927 errno = ENAMETOOLONG; 1928 return -1; 1929 } 1930 os::native_path(strcpy(pathbuf, path)); 1931 return ::stat(pathbuf, sbuf); 1932} 1933 1934static bool _print_ascii_file(const char* filename, outputStream* st) { 1935 int fd = ::open(filename, O_RDONLY); 1936 if (fd == -1) { 1937 return false; 1938 } 1939 1940 char buf[32]; 1941 int bytes; 1942 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1943 st->print_raw(buf, bytes); 1944 } 1945 1946 ::close(fd); 1947 1948 return true; 1949} 1950 1951void os::print_os_info_brief(outputStream* st) { 1952 os::Solaris::print_distro_info(st); 1953 1954 os::Posix::print_uname_info(st); 1955 1956 os::Solaris::print_libversion_info(st); 1957} 1958 1959void os::print_os_info(outputStream* st) { 1960 st->print("OS:"); 1961 1962 os::Solaris::print_distro_info(st); 1963 1964 os::Posix::print_uname_info(st); 1965 1966 os::Solaris::print_libversion_info(st); 1967 1968 os::Posix::print_rlimit_info(st); 1969 1970 os::Posix::print_load_average(st); 1971} 1972 1973void os::Solaris::print_distro_info(outputStream* st) { 1974 if (!_print_ascii_file("/etc/release", st)) { 1975 st->print("Solaris"); 1976 } 1977 st->cr(); 1978} 1979 1980void os::Solaris::print_libversion_info(outputStream* st) { 1981 st->print(" (T2 libthread)"); 1982 st->cr(); 1983} 1984 1985static bool check_addr0(outputStream* st) { 1986 jboolean status = false; 1987 int fd = ::open("/proc/self/map",O_RDONLY); 1988 if (fd >= 0) { 1989 prmap_t p; 1990 while (::read(fd, &p, sizeof(p)) > 0) { 1991 if (p.pr_vaddr == 0x0) { 1992 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 1993 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 1994 st->print("Access:"); 1995 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 1996 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 1997 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 1998 st->cr(); 1999 status = true; 2000 } 2001 } 2002 ::close(fd); 2003 } 2004 return status; 2005} 2006 2007void os::pd_print_cpu_info(outputStream* st) { 2008 // Nothing to do for now. 2009} 2010 2011void os::print_memory_info(outputStream* st) { 2012 st->print("Memory:"); 2013 st->print(" %dk page", os::vm_page_size()>>10); 2014 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2015 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2016 st->cr(); 2017 (void) check_addr0(st); 2018} 2019 2020void os::print_siginfo(outputStream* st, void* siginfo) { 2021 const siginfo_t* si = (const siginfo_t*)siginfo; 2022 2023 os::Posix::print_siginfo_brief(st, si); 2024 2025 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2026 UseSharedSpaces) { 2027 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2028 if (mapinfo->is_in_shared_space(si->si_addr)) { 2029 st->print("\n\nError accessing class data sharing archive." \ 2030 " Mapped file inaccessible during execution, " \ 2031 " possible disk/network problem."); 2032 } 2033 } 2034 st->cr(); 2035} 2036 2037// Moved from whole group, because we need them here for diagnostic 2038// prints. 2039#define OLDMAXSIGNUM 32 2040static int Maxsignum = 0; 2041static int *ourSigFlags = NULL; 2042 2043extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2044 2045int os::Solaris::get_our_sigflags(int sig) { 2046 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2047 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2048 return ourSigFlags[sig]; 2049} 2050 2051void os::Solaris::set_our_sigflags(int sig, int flags) { 2052 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2053 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2054 ourSigFlags[sig] = flags; 2055} 2056 2057 2058static const char* get_signal_handler_name(address handler, 2059 char* buf, int buflen) { 2060 int offset; 2061 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2062 if (found) { 2063 // skip directory names 2064 const char *p1, *p2; 2065 p1 = buf; 2066 size_t len = strlen(os::file_separator()); 2067 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2068 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2069 } else { 2070 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2071 } 2072 return buf; 2073} 2074 2075static void print_signal_handler(outputStream* st, int sig, 2076 char* buf, size_t buflen) { 2077 struct sigaction sa; 2078 2079 sigaction(sig, NULL, &sa); 2080 2081 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2082 2083 address handler = (sa.sa_flags & SA_SIGINFO) 2084 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2085 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2086 2087 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2088 st->print("SIG_DFL"); 2089 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2090 st->print("SIG_IGN"); 2091 } else { 2092 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2093 } 2094 2095 st->print(", sa_mask[0]="); 2096 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2097 2098 address rh = VMError::get_resetted_sighandler(sig); 2099 // May be, handler was resetted by VMError? 2100 if (rh != NULL) { 2101 handler = rh; 2102 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2103 } 2104 2105 st->print(", sa_flags="); 2106 os::Posix::print_sa_flags(st, sa.sa_flags); 2107 2108 // Check: is it our handler? 2109 if (handler == CAST_FROM_FN_PTR(address, signalHandler) || 2110 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2111 // It is our signal handler 2112 // check for flags 2113 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2114 st->print( 2115 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2116 os::Solaris::get_our_sigflags(sig)); 2117 } 2118 } 2119 st->cr(); 2120} 2121 2122void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2123 st->print_cr("Signal Handlers:"); 2124 print_signal_handler(st, SIGSEGV, buf, buflen); 2125 print_signal_handler(st, SIGBUS , buf, buflen); 2126 print_signal_handler(st, SIGFPE , buf, buflen); 2127 print_signal_handler(st, SIGPIPE, buf, buflen); 2128 print_signal_handler(st, SIGXFSZ, buf, buflen); 2129 print_signal_handler(st, SIGILL , buf, buflen); 2130 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2131 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2132 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2133 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2134 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2135 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2136 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2137 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2138} 2139 2140static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2141 2142// Find the full path to the current module, libjvm.so 2143void os::jvm_path(char *buf, jint buflen) { 2144 // Error checking. 2145 if (buflen < MAXPATHLEN) { 2146 assert(false, "must use a large-enough buffer"); 2147 buf[0] = '\0'; 2148 return; 2149 } 2150 // Lazy resolve the path to current module. 2151 if (saved_jvm_path[0] != 0) { 2152 strcpy(buf, saved_jvm_path); 2153 return; 2154 } 2155 2156 Dl_info dlinfo; 2157 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2158 assert(ret != 0, "cannot locate libjvm"); 2159 if (ret != 0 && dlinfo.dli_fname != NULL) { 2160 realpath((char *)dlinfo.dli_fname, buf); 2161 } else { 2162 buf[0] = '\0'; 2163 return; 2164 } 2165 2166 if (Arguments::sun_java_launcher_is_altjvm()) { 2167 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2168 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2169 // If "/jre/lib/" appears at the right place in the string, then 2170 // assume we are installed in a JDK and we're done. Otherwise, check 2171 // for a JAVA_HOME environment variable and fix up the path so it 2172 // looks like libjvm.so is installed there (append a fake suffix 2173 // hotspot/libjvm.so). 2174 const char *p = buf + strlen(buf) - 1; 2175 for (int count = 0; p > buf && count < 5; ++count) { 2176 for (--p; p > buf && *p != '/'; --p) 2177 /* empty */ ; 2178 } 2179 2180 if (strncmp(p, "/jre/lib/", 9) != 0) { 2181 // Look for JAVA_HOME in the environment. 2182 char* java_home_var = ::getenv("JAVA_HOME"); 2183 if (java_home_var != NULL && java_home_var[0] != 0) { 2184 char cpu_arch[12]; 2185 char* jrelib_p; 2186 int len; 2187 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2188#ifdef _LP64 2189 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2190 if (strcmp(cpu_arch, "sparc") == 0) { 2191 strcat(cpu_arch, "v9"); 2192 } else if (strcmp(cpu_arch, "i386") == 0) { 2193 strcpy(cpu_arch, "amd64"); 2194 } 2195#endif 2196 // Check the current module name "libjvm.so". 2197 p = strrchr(buf, '/'); 2198 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2199 2200 realpath(java_home_var, buf); 2201 // determine if this is a legacy image or modules image 2202 // modules image doesn't have "jre" subdirectory 2203 len = strlen(buf); 2204 assert(len < buflen, "Ran out of buffer space"); 2205 jrelib_p = buf + len; 2206 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2207 if (0 != access(buf, F_OK)) { 2208 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2209 } 2210 2211 if (0 == access(buf, F_OK)) { 2212 // Use current module name "libjvm.so" 2213 len = strlen(buf); 2214 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2215 } else { 2216 // Go back to path of .so 2217 realpath((char *)dlinfo.dli_fname, buf); 2218 } 2219 } 2220 } 2221 } 2222 2223 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2224 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2225} 2226 2227 2228void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2229 // no prefix required, not even "_" 2230} 2231 2232 2233void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2234 // no suffix required 2235} 2236 2237// This method is a copy of JDK's sysGetLastErrorString 2238// from src/solaris/hpi/src/system_md.c 2239 2240size_t os::lasterror(char *buf, size_t len) { 2241 if (errno == 0) return 0; 2242 2243 const char *s = ::strerror(errno); 2244 size_t n = ::strlen(s); 2245 if (n >= len) { 2246 n = len - 1; 2247 } 2248 ::strncpy(buf, s, n); 2249 buf[n] = '\0'; 2250 return n; 2251} 2252 2253 2254// sun.misc.Signal 2255 2256extern "C" { 2257 static void UserHandler(int sig, void *siginfo, void *context) { 2258 // Ctrl-C is pressed during error reporting, likely because the error 2259 // handler fails to abort. Let VM die immediately. 2260 if (sig == SIGINT && is_error_reported()) { 2261 os::die(); 2262 } 2263 2264 os::signal_notify(sig); 2265 // We do not need to reinstate the signal handler each time... 2266 } 2267} 2268 2269void* os::user_handler() { 2270 return CAST_FROM_FN_PTR(void*, UserHandler); 2271} 2272 2273class Semaphore : public StackObj { 2274 public: 2275 Semaphore(); 2276 ~Semaphore(); 2277 void signal(); 2278 void wait(); 2279 bool trywait(); 2280 bool timedwait(unsigned int sec, int nsec); 2281 private: 2282 sema_t _semaphore; 2283}; 2284 2285 2286Semaphore::Semaphore() { 2287 sema_init(&_semaphore, 0, NULL, NULL); 2288} 2289 2290Semaphore::~Semaphore() { 2291 sema_destroy(&_semaphore); 2292} 2293 2294void Semaphore::signal() { 2295 sema_post(&_semaphore); 2296} 2297 2298void Semaphore::wait() { 2299 sema_wait(&_semaphore); 2300} 2301 2302bool Semaphore::trywait() { 2303 return sema_trywait(&_semaphore) == 0; 2304} 2305 2306bool Semaphore::timedwait(unsigned int sec, int nsec) { 2307 struct timespec ts; 2308 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2309 2310 while (1) { 2311 int result = sema_timedwait(&_semaphore, &ts); 2312 if (result == 0) { 2313 return true; 2314 } else if (errno == EINTR) { 2315 continue; 2316 } else if (errno == ETIME) { 2317 return false; 2318 } else { 2319 return false; 2320 } 2321 } 2322} 2323 2324extern "C" { 2325 typedef void (*sa_handler_t)(int); 2326 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2327} 2328 2329void* os::signal(int signal_number, void* handler) { 2330 struct sigaction sigAct, oldSigAct; 2331 sigfillset(&(sigAct.sa_mask)); 2332 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2333 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2334 2335 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2336 // -1 means registration failed 2337 return (void *)-1; 2338 } 2339 2340 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2341} 2342 2343void os::signal_raise(int signal_number) { 2344 raise(signal_number); 2345} 2346 2347// The following code is moved from os.cpp for making this 2348// code platform specific, which it is by its very nature. 2349 2350// a counter for each possible signal value 2351static int Sigexit = 0; 2352static int Maxlibjsigsigs; 2353static jint *pending_signals = NULL; 2354static int *preinstalled_sigs = NULL; 2355static struct sigaction *chainedsigactions = NULL; 2356static sema_t sig_sem; 2357typedef int (*version_getting_t)(); 2358version_getting_t os::Solaris::get_libjsig_version = NULL; 2359static int libjsigversion = NULL; 2360 2361int os::sigexitnum_pd() { 2362 assert(Sigexit > 0, "signal memory not yet initialized"); 2363 return Sigexit; 2364} 2365 2366void os::Solaris::init_signal_mem() { 2367 // Initialize signal structures 2368 Maxsignum = SIGRTMAX; 2369 Sigexit = Maxsignum+1; 2370 assert(Maxsignum >0, "Unable to obtain max signal number"); 2371 2372 Maxlibjsigsigs = Maxsignum; 2373 2374 // pending_signals has one int per signal 2375 // The additional signal is for SIGEXIT - exit signal to signal_thread 2376 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2377 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2378 2379 if (UseSignalChaining) { 2380 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2381 * (Maxsignum + 1), mtInternal); 2382 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2383 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2384 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2385 } 2386 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2387 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2388} 2389 2390void os::signal_init_pd() { 2391 int ret; 2392 2393 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2394 assert(ret == 0, "sema_init() failed"); 2395} 2396 2397void os::signal_notify(int signal_number) { 2398 int ret; 2399 2400 Atomic::inc(&pending_signals[signal_number]); 2401 ret = ::sema_post(&sig_sem); 2402 assert(ret == 0, "sema_post() failed"); 2403} 2404 2405static int check_pending_signals(bool wait_for_signal) { 2406 int ret; 2407 while (true) { 2408 for (int i = 0; i < Sigexit + 1; i++) { 2409 jint n = pending_signals[i]; 2410 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2411 return i; 2412 } 2413 } 2414 if (!wait_for_signal) { 2415 return -1; 2416 } 2417 JavaThread *thread = JavaThread::current(); 2418 ThreadBlockInVM tbivm(thread); 2419 2420 bool threadIsSuspended; 2421 do { 2422 thread->set_suspend_equivalent(); 2423 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2424 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2425 ; 2426 assert(ret == 0, "sema_wait() failed"); 2427 2428 // were we externally suspended while we were waiting? 2429 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2430 if (threadIsSuspended) { 2431 // The semaphore has been incremented, but while we were waiting 2432 // another thread suspended us. We don't want to continue running 2433 // while suspended because that would surprise the thread that 2434 // suspended us. 2435 ret = ::sema_post(&sig_sem); 2436 assert(ret == 0, "sema_post() failed"); 2437 2438 thread->java_suspend_self(); 2439 } 2440 } while (threadIsSuspended); 2441 } 2442} 2443 2444int os::signal_lookup() { 2445 return check_pending_signals(false); 2446} 2447 2448int os::signal_wait() { 2449 return check_pending_signals(true); 2450} 2451 2452//////////////////////////////////////////////////////////////////////////////// 2453// Virtual Memory 2454 2455static int page_size = -1; 2456 2457// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2458// clear this var if support is not available. 2459static bool has_map_align = true; 2460 2461int os::vm_page_size() { 2462 assert(page_size != -1, "must call os::init"); 2463 return page_size; 2464} 2465 2466// Solaris allocates memory by pages. 2467int os::vm_allocation_granularity() { 2468 assert(page_size != -1, "must call os::init"); 2469 return page_size; 2470} 2471 2472static bool recoverable_mmap_error(int err) { 2473 // See if the error is one we can let the caller handle. This 2474 // list of errno values comes from the Solaris mmap(2) man page. 2475 switch (err) { 2476 case EBADF: 2477 case EINVAL: 2478 case ENOTSUP: 2479 // let the caller deal with these errors 2480 return true; 2481 2482 default: 2483 // Any remaining errors on this OS can cause our reserved mapping 2484 // to be lost. That can cause confusion where different data 2485 // structures think they have the same memory mapped. The worst 2486 // scenario is if both the VM and a library think they have the 2487 // same memory mapped. 2488 return false; 2489 } 2490} 2491 2492static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2493 int err) { 2494 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2495 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2496 strerror(err), err); 2497} 2498 2499static void warn_fail_commit_memory(char* addr, size_t bytes, 2500 size_t alignment_hint, bool exec, 2501 int err) { 2502 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2503 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2504 alignment_hint, exec, strerror(err), err); 2505} 2506 2507int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2508 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2509 size_t size = bytes; 2510 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2511 if (res != NULL) { 2512 if (UseNUMAInterleaving) { 2513 numa_make_global(addr, bytes); 2514 } 2515 return 0; 2516 } 2517 2518 int err = errno; // save errno from mmap() call in mmap_chunk() 2519 2520 if (!recoverable_mmap_error(err)) { 2521 warn_fail_commit_memory(addr, bytes, exec, err); 2522 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2523 } 2524 2525 return err; 2526} 2527 2528bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2529 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2530} 2531 2532void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2533 const char* mesg) { 2534 assert(mesg != NULL, "mesg must be specified"); 2535 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2536 if (err != 0) { 2537 // the caller wants all commit errors to exit with the specified mesg: 2538 warn_fail_commit_memory(addr, bytes, exec, err); 2539 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2540 } 2541} 2542 2543size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2544 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2545 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2546 alignment, (size_t) vm_page_size())); 2547 2548 for (int i = 0; _page_sizes[i] != 0; i++) { 2549 if (is_size_aligned(alignment, _page_sizes[i])) { 2550 return _page_sizes[i]; 2551 } 2552 } 2553 2554 return (size_t) vm_page_size(); 2555} 2556 2557int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2558 size_t alignment_hint, bool exec) { 2559 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2560 if (err == 0 && UseLargePages && alignment_hint > 0) { 2561 assert(is_size_aligned(bytes, alignment_hint), 2562 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint)); 2563 2564 // The syscall memcntl requires an exact page size (see man memcntl for details). 2565 size_t page_size = page_size_for_alignment(alignment_hint); 2566 if (page_size > (size_t) vm_page_size()) { 2567 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2568 } 2569 } 2570 return err; 2571} 2572 2573bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2574 bool exec) { 2575 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2576} 2577 2578void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2579 size_t alignment_hint, bool exec, 2580 const char* mesg) { 2581 assert(mesg != NULL, "mesg must be specified"); 2582 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2583 if (err != 0) { 2584 // the caller wants all commit errors to exit with the specified mesg: 2585 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2586 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2587 } 2588} 2589 2590// Uncommit the pages in a specified region. 2591void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2592 if (madvise(addr, bytes, MADV_FREE) < 0) { 2593 debug_only(warning("MADV_FREE failed.")); 2594 return; 2595 } 2596} 2597 2598bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2599 return os::commit_memory(addr, size, !ExecMem); 2600} 2601 2602bool os::remove_stack_guard_pages(char* addr, size_t size) { 2603 return os::uncommit_memory(addr, size); 2604} 2605 2606// Change the page size in a given range. 2607void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2608 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2609 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2610 if (UseLargePages) { 2611 Solaris::setup_large_pages(addr, bytes, alignment_hint); 2612 } 2613} 2614 2615// Tell the OS to make the range local to the first-touching LWP 2616void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2617 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2618 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2619 debug_only(warning("MADV_ACCESS_LWP failed.")); 2620 } 2621} 2622 2623// Tell the OS that this range would be accessed from different LWPs. 2624void os::numa_make_global(char *addr, size_t bytes) { 2625 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2626 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2627 debug_only(warning("MADV_ACCESS_MANY failed.")); 2628 } 2629} 2630 2631// Get the number of the locality groups. 2632size_t os::numa_get_groups_num() { 2633 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2634 return n != -1 ? n : 1; 2635} 2636 2637// Get a list of leaf locality groups. A leaf lgroup is group that 2638// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2639// board. An LWP is assigned to one of these groups upon creation. 2640size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2641 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2642 ids[0] = 0; 2643 return 1; 2644 } 2645 int result_size = 0, top = 1, bottom = 0, cur = 0; 2646 for (int k = 0; k < size; k++) { 2647 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2648 (Solaris::lgrp_id_t*)&ids[top], size - top); 2649 if (r == -1) { 2650 ids[0] = 0; 2651 return 1; 2652 } 2653 if (!r) { 2654 // That's a leaf node. 2655 assert(bottom <= cur, "Sanity check"); 2656 // Check if the node has memory 2657 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2658 NULL, 0, LGRP_RSRC_MEM) > 0) { 2659 ids[bottom++] = ids[cur]; 2660 } 2661 } 2662 top += r; 2663 cur++; 2664 } 2665 if (bottom == 0) { 2666 // Handle a situation, when the OS reports no memory available. 2667 // Assume UMA architecture. 2668 ids[0] = 0; 2669 return 1; 2670 } 2671 return bottom; 2672} 2673 2674// Detect the topology change. Typically happens during CPU plugging-unplugging. 2675bool os::numa_topology_changed() { 2676 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2677 if (is_stale != -1 && is_stale) { 2678 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2679 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2680 assert(c != 0, "Failure to initialize LGRP API"); 2681 Solaris::set_lgrp_cookie(c); 2682 return true; 2683 } 2684 return false; 2685} 2686 2687// Get the group id of the current LWP. 2688int os::numa_get_group_id() { 2689 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2690 if (lgrp_id == -1) { 2691 return 0; 2692 } 2693 const int size = os::numa_get_groups_num(); 2694 int *ids = (int*)alloca(size * sizeof(int)); 2695 2696 // Get the ids of all lgroups with memory; r is the count. 2697 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2698 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2699 if (r <= 0) { 2700 return 0; 2701 } 2702 return ids[os::random() % r]; 2703} 2704 2705// Request information about the page. 2706bool os::get_page_info(char *start, page_info* info) { 2707 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2708 uint64_t addr = (uintptr_t)start; 2709 uint64_t outdata[2]; 2710 uint_t validity = 0; 2711 2712 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2713 return false; 2714 } 2715 2716 info->size = 0; 2717 info->lgrp_id = -1; 2718 2719 if ((validity & 1) != 0) { 2720 if ((validity & 2) != 0) { 2721 info->lgrp_id = outdata[0]; 2722 } 2723 if ((validity & 4) != 0) { 2724 info->size = outdata[1]; 2725 } 2726 return true; 2727 } 2728 return false; 2729} 2730 2731// Scan the pages from start to end until a page different than 2732// the one described in the info parameter is encountered. 2733char *os::scan_pages(char *start, char* end, page_info* page_expected, 2734 page_info* page_found) { 2735 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2736 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2737 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2738 uint_t validity[MAX_MEMINFO_CNT]; 2739 2740 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2741 uint64_t p = (uint64_t)start; 2742 while (p < (uint64_t)end) { 2743 addrs[0] = p; 2744 size_t addrs_count = 1; 2745 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2746 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2747 addrs_count++; 2748 } 2749 2750 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2751 return NULL; 2752 } 2753 2754 size_t i = 0; 2755 for (; i < addrs_count; i++) { 2756 if ((validity[i] & 1) != 0) { 2757 if ((validity[i] & 4) != 0) { 2758 if (outdata[types * i + 1] != page_expected->size) { 2759 break; 2760 } 2761 } else if (page_expected->size != 0) { 2762 break; 2763 } 2764 2765 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2766 if (outdata[types * i] != page_expected->lgrp_id) { 2767 break; 2768 } 2769 } 2770 } else { 2771 return NULL; 2772 } 2773 } 2774 2775 if (i < addrs_count) { 2776 if ((validity[i] & 2) != 0) { 2777 page_found->lgrp_id = outdata[types * i]; 2778 } else { 2779 page_found->lgrp_id = -1; 2780 } 2781 if ((validity[i] & 4) != 0) { 2782 page_found->size = outdata[types * i + 1]; 2783 } else { 2784 page_found->size = 0; 2785 } 2786 return (char*)addrs[i]; 2787 } 2788 2789 p = addrs[addrs_count - 1] + page_size; 2790 } 2791 return end; 2792} 2793 2794bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2795 size_t size = bytes; 2796 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2797 // uncommitted page. Otherwise, the read/write might succeed if we 2798 // have enough swap space to back the physical page. 2799 return 2800 NULL != Solaris::mmap_chunk(addr, size, 2801 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2802 PROT_NONE); 2803} 2804 2805char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2806 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2807 2808 if (b == MAP_FAILED) { 2809 return NULL; 2810 } 2811 return b; 2812} 2813 2814char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2815 size_t alignment_hint, bool fixed) { 2816 char* addr = requested_addr; 2817 int flags = MAP_PRIVATE | MAP_NORESERVE; 2818 2819 assert(!(fixed && (alignment_hint > 0)), 2820 "alignment hint meaningless with fixed mmap"); 2821 2822 if (fixed) { 2823 flags |= MAP_FIXED; 2824 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2825 flags |= MAP_ALIGN; 2826 addr = (char*) alignment_hint; 2827 } 2828 2829 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2830 // uncommitted page. Otherwise, the read/write might succeed if we 2831 // have enough swap space to back the physical page. 2832 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2833} 2834 2835char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2836 size_t alignment_hint) { 2837 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2838 (requested_addr != NULL)); 2839 2840 guarantee(requested_addr == NULL || requested_addr == addr, 2841 "OS failed to return requested mmap address."); 2842 return addr; 2843} 2844 2845// Reserve memory at an arbitrary address, only if that area is 2846// available (and not reserved for something else). 2847 2848char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2849 const int max_tries = 10; 2850 char* base[max_tries]; 2851 size_t size[max_tries]; 2852 2853 // Solaris adds a gap between mmap'ed regions. The size of the gap 2854 // is dependent on the requested size and the MMU. Our initial gap 2855 // value here is just a guess and will be corrected later. 2856 bool had_top_overlap = false; 2857 bool have_adjusted_gap = false; 2858 size_t gap = 0x400000; 2859 2860 // Assert only that the size is a multiple of the page size, since 2861 // that's all that mmap requires, and since that's all we really know 2862 // about at this low abstraction level. If we need higher alignment, 2863 // we can either pass an alignment to this method or verify alignment 2864 // in one of the methods further up the call chain. See bug 5044738. 2865 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2866 2867 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2868 // Give it a try, if the kernel honors the hint we can return immediately. 2869 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2870 2871 volatile int err = errno; 2872 if (addr == requested_addr) { 2873 return addr; 2874 } else if (addr != NULL) { 2875 pd_unmap_memory(addr, bytes); 2876 } 2877 2878 if (PrintMiscellaneous && Verbose) { 2879 char buf[256]; 2880 buf[0] = '\0'; 2881 if (addr == NULL) { 2882 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2883 } 2884 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2885 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2886 "%s", bytes, requested_addr, addr, buf); 2887 } 2888 2889 // Address hint method didn't work. Fall back to the old method. 2890 // In theory, once SNV becomes our oldest supported platform, this 2891 // code will no longer be needed. 2892 // 2893 // Repeatedly allocate blocks until the block is allocated at the 2894 // right spot. Give up after max_tries. 2895 int i; 2896 for (i = 0; i < max_tries; ++i) { 2897 base[i] = reserve_memory(bytes); 2898 2899 if (base[i] != NULL) { 2900 // Is this the block we wanted? 2901 if (base[i] == requested_addr) { 2902 size[i] = bytes; 2903 break; 2904 } 2905 2906 // check that the gap value is right 2907 if (had_top_overlap && !have_adjusted_gap) { 2908 size_t actual_gap = base[i-1] - base[i] - bytes; 2909 if (gap != actual_gap) { 2910 // adjust the gap value and retry the last 2 allocations 2911 assert(i > 0, "gap adjustment code problem"); 2912 have_adjusted_gap = true; // adjust the gap only once, just in case 2913 gap = actual_gap; 2914 if (PrintMiscellaneous && Verbose) { 2915 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2916 } 2917 unmap_memory(base[i], bytes); 2918 unmap_memory(base[i-1], size[i-1]); 2919 i-=2; 2920 continue; 2921 } 2922 } 2923 2924 // Does this overlap the block we wanted? Give back the overlapped 2925 // parts and try again. 2926 // 2927 // There is still a bug in this code: if top_overlap == bytes, 2928 // the overlap is offset from requested region by the value of gap. 2929 // In this case giving back the overlapped part will not work, 2930 // because we'll give back the entire block at base[i] and 2931 // therefore the subsequent allocation will not generate a new gap. 2932 // This could be fixed with a new algorithm that used larger 2933 // or variable size chunks to find the requested region - 2934 // but such a change would introduce additional complications. 2935 // It's rare enough that the planets align for this bug, 2936 // so we'll just wait for a fix for 6204603/5003415 which 2937 // will provide a mmap flag to allow us to avoid this business. 2938 2939 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2940 if (top_overlap >= 0 && top_overlap < bytes) { 2941 had_top_overlap = true; 2942 unmap_memory(base[i], top_overlap); 2943 base[i] += top_overlap; 2944 size[i] = bytes - top_overlap; 2945 } else { 2946 size_t bottom_overlap = base[i] + bytes - requested_addr; 2947 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2948 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2949 warning("attempt_reserve_memory_at: possible alignment bug"); 2950 } 2951 unmap_memory(requested_addr, bottom_overlap); 2952 size[i] = bytes - bottom_overlap; 2953 } else { 2954 size[i] = bytes; 2955 } 2956 } 2957 } 2958 } 2959 2960 // Give back the unused reserved pieces. 2961 2962 for (int j = 0; j < i; ++j) { 2963 if (base[j] != NULL) { 2964 unmap_memory(base[j], size[j]); 2965 } 2966 } 2967 2968 return (i < max_tries) ? requested_addr : NULL; 2969} 2970 2971bool os::pd_release_memory(char* addr, size_t bytes) { 2972 size_t size = bytes; 2973 return munmap(addr, size) == 0; 2974} 2975 2976static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2977 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2978 "addr must be page aligned"); 2979 int retVal = mprotect(addr, bytes, prot); 2980 return retVal == 0; 2981} 2982 2983// Protect memory (Used to pass readonly pages through 2984// JNI GetArray<type>Elements with empty arrays.) 2985// Also, used for serialization page and for compressed oops null pointer 2986// checking. 2987bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2988 bool is_committed) { 2989 unsigned int p = 0; 2990 switch (prot) { 2991 case MEM_PROT_NONE: p = PROT_NONE; break; 2992 case MEM_PROT_READ: p = PROT_READ; break; 2993 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2994 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2995 default: 2996 ShouldNotReachHere(); 2997 } 2998 // is_committed is unused. 2999 return solaris_mprotect(addr, bytes, p); 3000} 3001 3002// guard_memory and unguard_memory only happens within stack guard pages. 3003// Since ISM pertains only to the heap, guard and unguard memory should not 3004/// happen with an ISM region. 3005bool os::guard_memory(char* addr, size_t bytes) { 3006 return solaris_mprotect(addr, bytes, PROT_NONE); 3007} 3008 3009bool os::unguard_memory(char* addr, size_t bytes) { 3010 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3011} 3012 3013// Large page support 3014static size_t _large_page_size = 0; 3015 3016// Insertion sort for small arrays (descending order). 3017static void insertion_sort_descending(size_t* array, int len) { 3018 for (int i = 0; i < len; i++) { 3019 size_t val = array[i]; 3020 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3021 size_t tmp = array[key]; 3022 array[key] = array[key - 1]; 3023 array[key - 1] = tmp; 3024 } 3025 } 3026} 3027 3028bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 3029 const unsigned int usable_count = VM_Version::page_size_count(); 3030 if (usable_count == 1) { 3031 return false; 3032 } 3033 3034 // Find the right getpagesizes interface. When solaris 11 is the minimum 3035 // build platform, getpagesizes() (without the '2') can be called directly. 3036 typedef int (*gps_t)(size_t[], int); 3037 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3038 if (gps_func == NULL) { 3039 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3040 if (gps_func == NULL) { 3041 if (warn) { 3042 warning("MPSS is not supported by the operating system."); 3043 } 3044 return false; 3045 } 3046 } 3047 3048 // Fill the array of page sizes. 3049 int n = (*gps_func)(_page_sizes, page_sizes_max); 3050 assert(n > 0, "Solaris bug?"); 3051 3052 if (n == page_sizes_max) { 3053 // Add a sentinel value (necessary only if the array was completely filled 3054 // since it is static (zeroed at initialization)). 3055 _page_sizes[--n] = 0; 3056 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3057 } 3058 assert(_page_sizes[n] == 0, "missing sentinel"); 3059 trace_page_sizes("available page sizes", _page_sizes, n); 3060 3061 if (n == 1) return false; // Only one page size available. 3062 3063 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3064 // select up to usable_count elements. First sort the array, find the first 3065 // acceptable value, then copy the usable sizes to the top of the array and 3066 // trim the rest. Make sure to include the default page size :-). 3067 // 3068 // A better policy could get rid of the 4M limit by taking the sizes of the 3069 // important VM memory regions (java heap and possibly the code cache) into 3070 // account. 3071 insertion_sort_descending(_page_sizes, n); 3072 const size_t size_limit = 3073 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3074 int beg; 3075 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 3076 const int end = MIN2((int)usable_count, n) - 1; 3077 for (int cur = 0; cur < end; ++cur, ++beg) { 3078 _page_sizes[cur] = _page_sizes[beg]; 3079 } 3080 _page_sizes[end] = vm_page_size(); 3081 _page_sizes[end + 1] = 0; 3082 3083 if (_page_sizes[end] > _page_sizes[end - 1]) { 3084 // Default page size is not the smallest; sort again. 3085 insertion_sort_descending(_page_sizes, end + 1); 3086 } 3087 *page_size = _page_sizes[0]; 3088 3089 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3090 return true; 3091} 3092 3093void os::large_page_init() { 3094 if (UseLargePages) { 3095 // print a warning if any large page related flag is specified on command line 3096 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3097 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3098 3099 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3100 } 3101} 3102 3103bool os::Solaris::is_valid_page_size(size_t bytes) { 3104 for (int i = 0; _page_sizes[i] != 0; i++) { 3105 if (_page_sizes[i] == bytes) { 3106 return true; 3107 } 3108 } 3109 return false; 3110} 3111 3112bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 3113 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align)); 3114 assert(is_ptr_aligned((void*) start, align), 3115 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align)); 3116 assert(is_size_aligned(bytes, align), 3117 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align)); 3118 3119 // Signal to OS that we want large pages for addresses 3120 // from addr, addr + bytes 3121 struct memcntl_mha mpss_struct; 3122 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3123 mpss_struct.mha_pagesize = align; 3124 mpss_struct.mha_flags = 0; 3125 // Upon successful completion, memcntl() returns 0 3126 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3127 debug_only(warning("Attempt to use MPSS failed.")); 3128 return false; 3129 } 3130 return true; 3131} 3132 3133char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3134 fatal("os::reserve_memory_special should not be called on Solaris."); 3135 return NULL; 3136} 3137 3138bool os::release_memory_special(char* base, size_t bytes) { 3139 fatal("os::release_memory_special should not be called on Solaris."); 3140 return false; 3141} 3142 3143size_t os::large_page_size() { 3144 return _large_page_size; 3145} 3146 3147// MPSS allows application to commit large page memory on demand; with ISM 3148// the entire memory region must be allocated as shared memory. 3149bool os::can_commit_large_page_memory() { 3150 return true; 3151} 3152 3153bool os::can_execute_large_page_memory() { 3154 return true; 3155} 3156 3157// Read calls from inside the vm need to perform state transitions 3158size_t os::read(int fd, void *buf, unsigned int nBytes) { 3159 size_t res; 3160 JavaThread* thread = (JavaThread*)Thread::current(); 3161 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3162 ThreadBlockInVM tbiv(thread); 3163 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3164 return res; 3165} 3166 3167size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3168 size_t res; 3169 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3170 "Assumed _thread_in_native"); 3171 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3172 return res; 3173} 3174 3175void os::naked_short_sleep(jlong ms) { 3176 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3177 3178 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3179 // Solaris requires -lrt for this. 3180 usleep((ms * 1000)); 3181 3182 return; 3183} 3184 3185// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3186void os::infinite_sleep() { 3187 while (true) { // sleep forever ... 3188 ::sleep(100); // ... 100 seconds at a time 3189 } 3190} 3191 3192// Used to convert frequent JVM_Yield() to nops 3193bool os::dont_yield() { 3194 if (DontYieldALot) { 3195 static hrtime_t last_time = 0; 3196 hrtime_t diff = getTimeNanos() - last_time; 3197 3198 if (diff < DontYieldALotInterval * 1000000) { 3199 return true; 3200 } 3201 3202 last_time += diff; 3203 3204 return false; 3205 } else { 3206 return false; 3207 } 3208} 3209 3210// Note that yield semantics are defined by the scheduling class to which 3211// the thread currently belongs. Typically, yield will _not yield to 3212// other equal or higher priority threads that reside on the dispatch queues 3213// of other CPUs. 3214 3215void os::naked_yield() { 3216 thr_yield(); 3217} 3218 3219// Interface for setting lwp priorities. If we are using T2 libthread, 3220// which forces the use of BoundThreads or we manually set UseBoundThreads, 3221// all of our threads will be assigned to real lwp's. Using the thr_setprio 3222// function is meaningless in this mode so we must adjust the real lwp's priority 3223// The routines below implement the getting and setting of lwp priorities. 3224// 3225// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3226// being deprecated and all threads are now BoundThreads 3227// 3228// Note: There are three priority scales used on Solaris. Java priotities 3229// which range from 1 to 10, libthread "thr_setprio" scale which range 3230// from 0 to 127, and the current scheduling class of the process we 3231// are running in. This is typically from -60 to +60. 3232// The setting of the lwp priorities in done after a call to thr_setprio 3233// so Java priorities are mapped to libthread priorities and we map from 3234// the latter to lwp priorities. We don't keep priorities stored in 3235// Java priorities since some of our worker threads want to set priorities 3236// higher than all Java threads. 3237// 3238// For related information: 3239// (1) man -s 2 priocntl 3240// (2) man -s 4 priocntl 3241// (3) man dispadmin 3242// = librt.so 3243// = libthread/common/rtsched.c - thrp_setlwpprio(). 3244// = ps -cL <pid> ... to validate priority. 3245// = sched_get_priority_min and _max 3246// pthread_create 3247// sched_setparam 3248// pthread_setschedparam 3249// 3250// Assumptions: 3251// + We assume that all threads in the process belong to the same 3252// scheduling class. IE. an homogenous process. 3253// + Must be root or in IA group to change change "interactive" attribute. 3254// Priocntl() will fail silently. The only indication of failure is when 3255// we read-back the value and notice that it hasn't changed. 3256// + Interactive threads enter the runq at the head, non-interactive at the tail. 3257// + For RT, change timeslice as well. Invariant: 3258// constant "priority integral" 3259// Konst == TimeSlice * (60-Priority) 3260// Given a priority, compute appropriate timeslice. 3261// + Higher numerical values have higher priority. 3262 3263// sched class attributes 3264typedef struct { 3265 int schedPolicy; // classID 3266 int maxPrio; 3267 int minPrio; 3268} SchedInfo; 3269 3270 3271static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3272 3273#ifdef ASSERT 3274static int ReadBackValidate = 1; 3275#endif 3276static int myClass = 0; 3277static int myMin = 0; 3278static int myMax = 0; 3279static int myCur = 0; 3280static bool priocntl_enable = false; 3281 3282static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3283static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3284 3285 3286// lwp_priocntl_init 3287// 3288// Try to determine the priority scale for our process. 3289// 3290// Return errno or 0 if OK. 3291// 3292static int lwp_priocntl_init() { 3293 int rslt; 3294 pcinfo_t ClassInfo; 3295 pcparms_t ParmInfo; 3296 int i; 3297 3298 if (!UseThreadPriorities) return 0; 3299 3300 // If ThreadPriorityPolicy is 1, switch tables 3301 if (ThreadPriorityPolicy == 1) { 3302 for (i = 0; i < CriticalPriority+1; i++) 3303 os::java_to_os_priority[i] = prio_policy1[i]; 3304 } 3305 if (UseCriticalJavaThreadPriority) { 3306 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3307 // See set_native_priority() and set_lwp_class_and_priority(). 3308 // Save original MaxPriority mapping in case attempt to 3309 // use critical priority fails. 3310 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3311 // Set negative to distinguish from other priorities 3312 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3313 } 3314 3315 // Get IDs for a set of well-known scheduling classes. 3316 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3317 // the system. We should have a loop that iterates over the 3318 // classID values, which are known to be "small" integers. 3319 3320 strcpy(ClassInfo.pc_clname, "TS"); 3321 ClassInfo.pc_cid = -1; 3322 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3323 if (rslt < 0) return errno; 3324 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3325 tsLimits.schedPolicy = ClassInfo.pc_cid; 3326 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3327 tsLimits.minPrio = -tsLimits.maxPrio; 3328 3329 strcpy(ClassInfo.pc_clname, "IA"); 3330 ClassInfo.pc_cid = -1; 3331 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3332 if (rslt < 0) return errno; 3333 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3334 iaLimits.schedPolicy = ClassInfo.pc_cid; 3335 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3336 iaLimits.minPrio = -iaLimits.maxPrio; 3337 3338 strcpy(ClassInfo.pc_clname, "RT"); 3339 ClassInfo.pc_cid = -1; 3340 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3341 if (rslt < 0) return errno; 3342 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3343 rtLimits.schedPolicy = ClassInfo.pc_cid; 3344 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3345 rtLimits.minPrio = 0; 3346 3347 strcpy(ClassInfo.pc_clname, "FX"); 3348 ClassInfo.pc_cid = -1; 3349 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3350 if (rslt < 0) return errno; 3351 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3352 fxLimits.schedPolicy = ClassInfo.pc_cid; 3353 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3354 fxLimits.minPrio = 0; 3355 3356 // Query our "current" scheduling class. 3357 // This will normally be IA, TS or, rarely, FX or RT. 3358 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3359 ParmInfo.pc_cid = PC_CLNULL; 3360 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3361 if (rslt < 0) return errno; 3362 myClass = ParmInfo.pc_cid; 3363 3364 // We now know our scheduling classId, get specific information 3365 // about the class. 3366 ClassInfo.pc_cid = myClass; 3367 ClassInfo.pc_clname[0] = 0; 3368 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3369 if (rslt < 0) return errno; 3370 3371 if (ThreadPriorityVerbose) { 3372 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3373 } 3374 3375 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3376 ParmInfo.pc_cid = PC_CLNULL; 3377 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3378 if (rslt < 0) return errno; 3379 3380 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3381 myMin = rtLimits.minPrio; 3382 myMax = rtLimits.maxPrio; 3383 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3384 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3385 myMin = iaLimits.minPrio; 3386 myMax = iaLimits.maxPrio; 3387 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3388 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3389 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3390 myMin = tsLimits.minPrio; 3391 myMax = tsLimits.maxPrio; 3392 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3393 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3394 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3395 myMin = fxLimits.minPrio; 3396 myMax = fxLimits.maxPrio; 3397 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3398 } else { 3399 // No clue - punt 3400 if (ThreadPriorityVerbose) { 3401 tty->print_cr("Unknown scheduling class: %s ... \n", 3402 ClassInfo.pc_clname); 3403 } 3404 return EINVAL; // no clue, punt 3405 } 3406 3407 if (ThreadPriorityVerbose) { 3408 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3409 } 3410 3411 priocntl_enable = true; // Enable changing priorities 3412 return 0; 3413} 3414 3415#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3416#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3417#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3418#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3419 3420 3421// scale_to_lwp_priority 3422// 3423// Convert from the libthread "thr_setprio" scale to our current 3424// lwp scheduling class scale. 3425// 3426static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3427 int v; 3428 3429 if (x == 127) return rMax; // avoid round-down 3430 v = (((x*(rMax-rMin)))/128)+rMin; 3431 return v; 3432} 3433 3434 3435// set_lwp_class_and_priority 3436int set_lwp_class_and_priority(int ThreadID, int lwpid, 3437 int newPrio, int new_class, bool scale) { 3438 int rslt; 3439 int Actual, Expected, prv; 3440 pcparms_t ParmInfo; // for GET-SET 3441#ifdef ASSERT 3442 pcparms_t ReadBack; // for readback 3443#endif 3444 3445 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3446 // Query current values. 3447 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3448 // Cache "pcparms_t" in global ParmCache. 3449 // TODO: elide set-to-same-value 3450 3451 // If something went wrong on init, don't change priorities. 3452 if (!priocntl_enable) { 3453 if (ThreadPriorityVerbose) { 3454 tty->print_cr("Trying to set priority but init failed, ignoring"); 3455 } 3456 return EINVAL; 3457 } 3458 3459 // If lwp hasn't started yet, just return 3460 // the _start routine will call us again. 3461 if (lwpid <= 0) { 3462 if (ThreadPriorityVerbose) { 3463 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3464 INTPTR_FORMAT " to %d, lwpid not set", 3465 ThreadID, newPrio); 3466 } 3467 return 0; 3468 } 3469 3470 if (ThreadPriorityVerbose) { 3471 tty->print_cr ("set_lwp_class_and_priority(" 3472 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3473 ThreadID, lwpid, newPrio); 3474 } 3475 3476 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3477 ParmInfo.pc_cid = PC_CLNULL; 3478 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3479 if (rslt < 0) return errno; 3480 3481 int cur_class = ParmInfo.pc_cid; 3482 ParmInfo.pc_cid = (id_t)new_class; 3483 3484 if (new_class == rtLimits.schedPolicy) { 3485 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3486 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3487 rtLimits.maxPrio, newPrio) 3488 : newPrio; 3489 rtInfo->rt_tqsecs = RT_NOCHANGE; 3490 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3491 if (ThreadPriorityVerbose) { 3492 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3493 } 3494 } else if (new_class == iaLimits.schedPolicy) { 3495 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3496 int maxClamped = MIN2(iaLimits.maxPrio, 3497 cur_class == new_class 3498 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3499 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3500 maxClamped, newPrio) 3501 : newPrio; 3502 iaInfo->ia_uprilim = cur_class == new_class 3503 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3504 iaInfo->ia_mode = IA_NOCHANGE; 3505 if (ThreadPriorityVerbose) { 3506 tty->print_cr("IA: [%d...%d] %d->%d\n", 3507 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3508 } 3509 } else if (new_class == tsLimits.schedPolicy) { 3510 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3511 int maxClamped = MIN2(tsLimits.maxPrio, 3512 cur_class == new_class 3513 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3514 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3515 maxClamped, newPrio) 3516 : newPrio; 3517 tsInfo->ts_uprilim = cur_class == new_class 3518 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3519 if (ThreadPriorityVerbose) { 3520 tty->print_cr("TS: [%d...%d] %d->%d\n", 3521 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3522 } 3523 } else if (new_class == fxLimits.schedPolicy) { 3524 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3525 int maxClamped = MIN2(fxLimits.maxPrio, 3526 cur_class == new_class 3527 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3528 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3529 maxClamped, newPrio) 3530 : newPrio; 3531 fxInfo->fx_uprilim = cur_class == new_class 3532 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3533 fxInfo->fx_tqsecs = FX_NOCHANGE; 3534 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3535 if (ThreadPriorityVerbose) { 3536 tty->print_cr("FX: [%d...%d] %d->%d\n", 3537 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3538 } 3539 } else { 3540 if (ThreadPriorityVerbose) { 3541 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3542 } 3543 return EINVAL; // no clue, punt 3544 } 3545 3546 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3547 if (ThreadPriorityVerbose && rslt) { 3548 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3549 } 3550 if (rslt < 0) return errno; 3551 3552#ifdef ASSERT 3553 // Sanity check: read back what we just attempted to set. 3554 // In theory it could have changed in the interim ... 3555 // 3556 // The priocntl system call is tricky. 3557 // Sometimes it'll validate the priority value argument and 3558 // return EINVAL if unhappy. At other times it fails silently. 3559 // Readbacks are prudent. 3560 3561 if (!ReadBackValidate) return 0; 3562 3563 memset(&ReadBack, 0, sizeof(pcparms_t)); 3564 ReadBack.pc_cid = PC_CLNULL; 3565 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3566 assert(rslt >= 0, "priocntl failed"); 3567 Actual = Expected = 0xBAD; 3568 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3569 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3570 Actual = RTPRI(ReadBack)->rt_pri; 3571 Expected = RTPRI(ParmInfo)->rt_pri; 3572 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3573 Actual = IAPRI(ReadBack)->ia_upri; 3574 Expected = IAPRI(ParmInfo)->ia_upri; 3575 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3576 Actual = TSPRI(ReadBack)->ts_upri; 3577 Expected = TSPRI(ParmInfo)->ts_upri; 3578 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3579 Actual = FXPRI(ReadBack)->fx_upri; 3580 Expected = FXPRI(ParmInfo)->fx_upri; 3581 } else { 3582 if (ThreadPriorityVerbose) { 3583 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3584 ParmInfo.pc_cid); 3585 } 3586 } 3587 3588 if (Actual != Expected) { 3589 if (ThreadPriorityVerbose) { 3590 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3591 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3592 } 3593 } 3594#endif 3595 3596 return 0; 3597} 3598 3599// Solaris only gives access to 128 real priorities at a time, 3600// so we expand Java's ten to fill this range. This would be better 3601// if we dynamically adjusted relative priorities. 3602// 3603// The ThreadPriorityPolicy option allows us to select 2 different 3604// priority scales. 3605// 3606// ThreadPriorityPolicy=0 3607// Since the Solaris' default priority is MaximumPriority, we do not 3608// set a priority lower than Max unless a priority lower than 3609// NormPriority is requested. 3610// 3611// ThreadPriorityPolicy=1 3612// This mode causes the priority table to get filled with 3613// linear values. NormPriority get's mapped to 50% of the 3614// Maximum priority an so on. This will cause VM threads 3615// to get unfair treatment against other Solaris processes 3616// which do not explicitly alter their thread priorities. 3617 3618int os::java_to_os_priority[CriticalPriority + 1] = { 3619 -99999, // 0 Entry should never be used 3620 3621 0, // 1 MinPriority 3622 32, // 2 3623 64, // 3 3624 3625 96, // 4 3626 127, // 5 NormPriority 3627 127, // 6 3628 3629 127, // 7 3630 127, // 8 3631 127, // 9 NearMaxPriority 3632 3633 127, // 10 MaxPriority 3634 3635 -criticalPrio // 11 CriticalPriority 3636}; 3637 3638OSReturn os::set_native_priority(Thread* thread, int newpri) { 3639 OSThread* osthread = thread->osthread(); 3640 3641 // Save requested priority in case the thread hasn't been started 3642 osthread->set_native_priority(newpri); 3643 3644 // Check for critical priority request 3645 bool fxcritical = false; 3646 if (newpri == -criticalPrio) { 3647 fxcritical = true; 3648 newpri = criticalPrio; 3649 } 3650 3651 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3652 if (!UseThreadPriorities) return OS_OK; 3653 3654 int status = 0; 3655 3656 if (!fxcritical) { 3657 // Use thr_setprio only if we have a priority that thr_setprio understands 3658 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3659 } 3660 3661 int lwp_status = 3662 set_lwp_class_and_priority(osthread->thread_id(), 3663 osthread->lwp_id(), 3664 newpri, 3665 fxcritical ? fxLimits.schedPolicy : myClass, 3666 !fxcritical); 3667 if (lwp_status != 0 && fxcritical) { 3668 // Try again, this time without changing the scheduling class 3669 newpri = java_MaxPriority_to_os_priority; 3670 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3671 osthread->lwp_id(), 3672 newpri, myClass, false); 3673 } 3674 status |= lwp_status; 3675 return (status == 0) ? OS_OK : OS_ERR; 3676} 3677 3678 3679OSReturn os::get_native_priority(const Thread* const thread, 3680 int *priority_ptr) { 3681 int p; 3682 if (!UseThreadPriorities) { 3683 *priority_ptr = NormalPriority; 3684 return OS_OK; 3685 } 3686 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3687 if (status != 0) { 3688 return OS_ERR; 3689 } 3690 *priority_ptr = p; 3691 return OS_OK; 3692} 3693 3694 3695// Hint to the underlying OS that a task switch would not be good. 3696// Void return because it's a hint and can fail. 3697void os::hint_no_preempt() { 3698 schedctl_start(schedctl_init()); 3699} 3700 3701static void resume_clear_context(OSThread *osthread) { 3702 osthread->set_ucontext(NULL); 3703} 3704 3705static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3706 osthread->set_ucontext(context); 3707} 3708 3709static Semaphore sr_semaphore; 3710 3711void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3712 // Save and restore errno to avoid confusing native code with EINTR 3713 // after sigsuspend. 3714 int old_errno = errno; 3715 3716 OSThread* osthread = thread->osthread(); 3717 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3718 3719 os::SuspendResume::State current = osthread->sr.state(); 3720 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3721 suspend_save_context(osthread, uc); 3722 3723 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3724 os::SuspendResume::State state = osthread->sr.suspended(); 3725 if (state == os::SuspendResume::SR_SUSPENDED) { 3726 sigset_t suspend_set; // signals for sigsuspend() 3727 3728 // get current set of blocked signals and unblock resume signal 3729 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 3730 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3731 3732 sr_semaphore.signal(); 3733 // wait here until we are resumed 3734 while (1) { 3735 sigsuspend(&suspend_set); 3736 3737 os::SuspendResume::State result = osthread->sr.running(); 3738 if (result == os::SuspendResume::SR_RUNNING) { 3739 sr_semaphore.signal(); 3740 break; 3741 } 3742 } 3743 3744 } else if (state == os::SuspendResume::SR_RUNNING) { 3745 // request was cancelled, continue 3746 } else { 3747 ShouldNotReachHere(); 3748 } 3749 3750 resume_clear_context(osthread); 3751 } else if (current == os::SuspendResume::SR_RUNNING) { 3752 // request was cancelled, continue 3753 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3754 // ignore 3755 } else { 3756 // ignore 3757 } 3758 3759 errno = old_errno; 3760} 3761 3762void os::print_statistics() { 3763} 3764 3765int os::message_box(const char* title, const char* message) { 3766 int i; 3767 fdStream err(defaultStream::error_fd()); 3768 for (i = 0; i < 78; i++) err.print_raw("="); 3769 err.cr(); 3770 err.print_raw_cr(title); 3771 for (i = 0; i < 78; i++) err.print_raw("-"); 3772 err.cr(); 3773 err.print_raw_cr(message); 3774 for (i = 0; i < 78; i++) err.print_raw("="); 3775 err.cr(); 3776 3777 char buf[16]; 3778 // Prevent process from exiting upon "read error" without consuming all CPU 3779 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3780 3781 return buf[0] == 'y' || buf[0] == 'Y'; 3782} 3783 3784static int sr_notify(OSThread* osthread) { 3785 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3786 assert_status(status == 0, status, "thr_kill"); 3787 return status; 3788} 3789 3790// "Randomly" selected value for how long we want to spin 3791// before bailing out on suspending a thread, also how often 3792// we send a signal to a thread we want to resume 3793static const int RANDOMLY_LARGE_INTEGER = 1000000; 3794static const int RANDOMLY_LARGE_INTEGER2 = 100; 3795 3796static bool do_suspend(OSThread* osthread) { 3797 assert(osthread->sr.is_running(), "thread should be running"); 3798 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3799 3800 // mark as suspended and send signal 3801 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3802 // failed to switch, state wasn't running? 3803 ShouldNotReachHere(); 3804 return false; 3805 } 3806 3807 if (sr_notify(osthread) != 0) { 3808 ShouldNotReachHere(); 3809 } 3810 3811 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3812 while (true) { 3813 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3814 break; 3815 } else { 3816 // timeout 3817 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3818 if (cancelled == os::SuspendResume::SR_RUNNING) { 3819 return false; 3820 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3821 // make sure that we consume the signal on the semaphore as well 3822 sr_semaphore.wait(); 3823 break; 3824 } else { 3825 ShouldNotReachHere(); 3826 return false; 3827 } 3828 } 3829 } 3830 3831 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3832 return true; 3833} 3834 3835static void do_resume(OSThread* osthread) { 3836 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3837 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3838 3839 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3840 // failed to switch to WAKEUP_REQUEST 3841 ShouldNotReachHere(); 3842 return; 3843 } 3844 3845 while (true) { 3846 if (sr_notify(osthread) == 0) { 3847 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3848 if (osthread->sr.is_running()) { 3849 return; 3850 } 3851 } 3852 } else { 3853 ShouldNotReachHere(); 3854 } 3855 } 3856 3857 guarantee(osthread->sr.is_running(), "Must be running!"); 3858} 3859 3860void os::SuspendedThreadTask::internal_do_task() { 3861 if (do_suspend(_thread->osthread())) { 3862 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3863 do_task(context); 3864 do_resume(_thread->osthread()); 3865 } 3866} 3867 3868class PcFetcher : public os::SuspendedThreadTask { 3869 public: 3870 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3871 ExtendedPC result(); 3872 protected: 3873 void do_task(const os::SuspendedThreadTaskContext& context); 3874 private: 3875 ExtendedPC _epc; 3876}; 3877 3878ExtendedPC PcFetcher::result() { 3879 guarantee(is_done(), "task is not done yet."); 3880 return _epc; 3881} 3882 3883void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3884 Thread* thread = context.thread(); 3885 OSThread* osthread = thread->osthread(); 3886 if (osthread->ucontext() != NULL) { 3887 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 3888 } else { 3889 // NULL context is unexpected, double-check this is the VMThread 3890 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3891 } 3892} 3893 3894// A lightweight implementation that does not suspend the target thread and 3895// thus returns only a hint. Used for profiling only! 3896ExtendedPC os::get_thread_pc(Thread* thread) { 3897 // Make sure that it is called by the watcher and the Threads lock is owned. 3898 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3899 // For now, is only used to profile the VM Thread 3900 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3901 PcFetcher fetcher(thread); 3902 fetcher.run(); 3903 return fetcher.result(); 3904} 3905 3906 3907// This does not do anything on Solaris. This is basically a hook for being 3908// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3909void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3910 methodHandle* method, JavaCallArguments* args, 3911 Thread* thread) { 3912 f(value, method, args, thread); 3913} 3914 3915// This routine may be used by user applications as a "hook" to catch signals. 3916// The user-defined signal handler must pass unrecognized signals to this 3917// routine, and if it returns true (non-zero), then the signal handler must 3918// return immediately. If the flag "abort_if_unrecognized" is true, then this 3919// routine will never retun false (zero), but instead will execute a VM panic 3920// routine kill the process. 3921// 3922// If this routine returns false, it is OK to call it again. This allows 3923// the user-defined signal handler to perform checks either before or after 3924// the VM performs its own checks. Naturally, the user code would be making 3925// a serious error if it tried to handle an exception (such as a null check 3926// or breakpoint) that the VM was generating for its own correct operation. 3927// 3928// This routine may recognize any of the following kinds of signals: 3929// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3930// os::Solaris::SIGasync 3931// It should be consulted by handlers for any of those signals. 3932// It explicitly does not recognize os::Solaris::SIGinterrupt 3933// 3934// The caller of this routine must pass in the three arguments supplied 3935// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3936// field of the structure passed to sigaction(). This routine assumes that 3937// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3938// 3939// Note that the VM will print warnings if it detects conflicting signal 3940// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3941// 3942extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3943 siginfo_t* siginfo, 3944 void* ucontext, 3945 int abort_if_unrecognized); 3946 3947 3948void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3949 int orig_errno = errno; // Preserve errno value over signal handler. 3950 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3951 errno = orig_errno; 3952} 3953 3954// Do not delete - if guarantee is ever removed, a signal handler (even empty) 3955// is needed to provoke threads blocked on IO to return an EINTR 3956// Note: this explicitly does NOT call JVM_handle_solaris_signal and 3957// does NOT participate in signal chaining due to requirement for 3958// NOT setting SA_RESTART to make EINTR work. 3959extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3960 if (UseSignalChaining) { 3961 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3962 if (actp && actp->sa_handler) { 3963 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3964 } 3965 } 3966} 3967 3968// This boolean allows users to forward their own non-matching signals 3969// to JVM_handle_solaris_signal, harmlessly. 3970bool os::Solaris::signal_handlers_are_installed = false; 3971 3972// For signal-chaining 3973bool os::Solaris::libjsig_is_loaded = false; 3974typedef struct sigaction *(*get_signal_t)(int); 3975get_signal_t os::Solaris::get_signal_action = NULL; 3976 3977struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3978 struct sigaction *actp = NULL; 3979 3980 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3981 // Retrieve the old signal handler from libjsig 3982 actp = (*get_signal_action)(sig); 3983 } 3984 if (actp == NULL) { 3985 // Retrieve the preinstalled signal handler from jvm 3986 actp = get_preinstalled_handler(sig); 3987 } 3988 3989 return actp; 3990} 3991 3992static bool call_chained_handler(struct sigaction *actp, int sig, 3993 siginfo_t *siginfo, void *context) { 3994 // Call the old signal handler 3995 if (actp->sa_handler == SIG_DFL) { 3996 // It's more reasonable to let jvm treat it as an unexpected exception 3997 // instead of taking the default action. 3998 return false; 3999 } else if (actp->sa_handler != SIG_IGN) { 4000 if ((actp->sa_flags & SA_NODEFER) == 0) { 4001 // automaticlly block the signal 4002 sigaddset(&(actp->sa_mask), sig); 4003 } 4004 4005 sa_handler_t hand; 4006 sa_sigaction_t sa; 4007 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4008 // retrieve the chained handler 4009 if (siginfo_flag_set) { 4010 sa = actp->sa_sigaction; 4011 } else { 4012 hand = actp->sa_handler; 4013 } 4014 4015 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4016 actp->sa_handler = SIG_DFL; 4017 } 4018 4019 // try to honor the signal mask 4020 sigset_t oset; 4021 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4022 4023 // call into the chained handler 4024 if (siginfo_flag_set) { 4025 (*sa)(sig, siginfo, context); 4026 } else { 4027 (*hand)(sig); 4028 } 4029 4030 // restore the signal mask 4031 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4032 } 4033 // Tell jvm's signal handler the signal is taken care of. 4034 return true; 4035} 4036 4037bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4038 bool chained = false; 4039 // signal-chaining 4040 if (UseSignalChaining) { 4041 struct sigaction *actp = get_chained_signal_action(sig); 4042 if (actp != NULL) { 4043 chained = call_chained_handler(actp, sig, siginfo, context); 4044 } 4045 } 4046 return chained; 4047} 4048 4049struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4050 assert((chainedsigactions != (struct sigaction *)NULL) && 4051 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4052 if (preinstalled_sigs[sig] != 0) { 4053 return &chainedsigactions[sig]; 4054 } 4055 return NULL; 4056} 4057 4058void os::Solaris::save_preinstalled_handler(int sig, 4059 struct sigaction& oldAct) { 4060 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4061 assert((chainedsigactions != (struct sigaction *)NULL) && 4062 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4063 chainedsigactions[sig] = oldAct; 4064 preinstalled_sigs[sig] = 1; 4065} 4066 4067void os::Solaris::set_signal_handler(int sig, bool set_installed, 4068 bool oktochain) { 4069 // Check for overwrite. 4070 struct sigaction oldAct; 4071 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4072 void* oldhand = 4073 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4074 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4075 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4076 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4077 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4078 if (AllowUserSignalHandlers || !set_installed) { 4079 // Do not overwrite; user takes responsibility to forward to us. 4080 return; 4081 } else if (UseSignalChaining) { 4082 if (oktochain) { 4083 // save the old handler in jvm 4084 save_preinstalled_handler(sig, oldAct); 4085 } else { 4086 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4087 } 4088 // libjsig also interposes the sigaction() call below and saves the 4089 // old sigaction on it own. 4090 } else { 4091 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4092 "%#lx for signal %d.", (long)oldhand, sig)); 4093 } 4094 } 4095 4096 struct sigaction sigAct; 4097 sigfillset(&(sigAct.sa_mask)); 4098 sigAct.sa_handler = SIG_DFL; 4099 4100 sigAct.sa_sigaction = signalHandler; 4101 // Handle SIGSEGV on alternate signal stack if 4102 // not using stack banging 4103 if (!UseStackBanging && sig == SIGSEGV) { 4104 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4105 } else if (sig == os::Solaris::SIGinterrupt()) { 4106 // Interruptible i/o requires SA_RESTART cleared so EINTR 4107 // is returned instead of restarting system calls 4108 sigemptyset(&sigAct.sa_mask); 4109 sigAct.sa_handler = NULL; 4110 sigAct.sa_flags = SA_SIGINFO; 4111 sigAct.sa_sigaction = sigINTRHandler; 4112 } else { 4113 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4114 } 4115 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4116 4117 sigaction(sig, &sigAct, &oldAct); 4118 4119 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4120 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4121 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4122} 4123 4124 4125#define DO_SIGNAL_CHECK(sig) \ 4126 do { \ 4127 if (!sigismember(&check_signal_done, sig)) { \ 4128 os::Solaris::check_signal_handler(sig); \ 4129 } \ 4130 } while (0) 4131 4132// This method is a periodic task to check for misbehaving JNI applications 4133// under CheckJNI, we can add any periodic checks here 4134 4135void os::run_periodic_checks() { 4136 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4137 // thereby preventing a NULL checks. 4138 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4139 4140 if (check_signals == false) return; 4141 4142 // SEGV and BUS if overridden could potentially prevent 4143 // generation of hs*.log in the event of a crash, debugging 4144 // such a case can be very challenging, so we absolutely 4145 // check for the following for a good measure: 4146 DO_SIGNAL_CHECK(SIGSEGV); 4147 DO_SIGNAL_CHECK(SIGILL); 4148 DO_SIGNAL_CHECK(SIGFPE); 4149 DO_SIGNAL_CHECK(SIGBUS); 4150 DO_SIGNAL_CHECK(SIGPIPE); 4151 DO_SIGNAL_CHECK(SIGXFSZ); 4152 4153 // ReduceSignalUsage allows the user to override these handlers 4154 // see comments at the very top and jvm_solaris.h 4155 if (!ReduceSignalUsage) { 4156 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4157 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4158 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4159 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4160 } 4161 4162 // See comments above for using JVM1/JVM2 and UseAltSigs 4163 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4164 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4165 4166} 4167 4168typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4169 4170static os_sigaction_t os_sigaction = NULL; 4171 4172void os::Solaris::check_signal_handler(int sig) { 4173 char buf[O_BUFLEN]; 4174 address jvmHandler = NULL; 4175 4176 struct sigaction act; 4177 if (os_sigaction == NULL) { 4178 // only trust the default sigaction, in case it has been interposed 4179 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4180 if (os_sigaction == NULL) return; 4181 } 4182 4183 os_sigaction(sig, (struct sigaction*)NULL, &act); 4184 4185 address thisHandler = (act.sa_flags & SA_SIGINFO) 4186 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4187 : CAST_FROM_FN_PTR(address, act.sa_handler); 4188 4189 4190 switch (sig) { 4191 case SIGSEGV: 4192 case SIGBUS: 4193 case SIGFPE: 4194 case SIGPIPE: 4195 case SIGXFSZ: 4196 case SIGILL: 4197 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4198 break; 4199 4200 case SHUTDOWN1_SIGNAL: 4201 case SHUTDOWN2_SIGNAL: 4202 case SHUTDOWN3_SIGNAL: 4203 case BREAK_SIGNAL: 4204 jvmHandler = (address)user_handler(); 4205 break; 4206 4207 default: 4208 int intrsig = os::Solaris::SIGinterrupt(); 4209 int asynsig = os::Solaris::SIGasync(); 4210 4211 if (sig == intrsig) { 4212 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4213 } else if (sig == asynsig) { 4214 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4215 } else { 4216 return; 4217 } 4218 break; 4219 } 4220 4221 4222 if (thisHandler != jvmHandler) { 4223 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4224 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4225 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4226 // No need to check this sig any longer 4227 sigaddset(&check_signal_done, sig); 4228 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4229 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4230 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4231 exception_name(sig, buf, O_BUFLEN)); 4232 } 4233 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4234 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4235 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4236 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4237 // No need to check this sig any longer 4238 sigaddset(&check_signal_done, sig); 4239 } 4240 4241 // Print all the signal handler state 4242 if (sigismember(&check_signal_done, sig)) { 4243 print_signal_handlers(tty, buf, O_BUFLEN); 4244 } 4245 4246} 4247 4248void os::Solaris::install_signal_handlers() { 4249 bool libjsigdone = false; 4250 signal_handlers_are_installed = true; 4251 4252 // signal-chaining 4253 typedef void (*signal_setting_t)(); 4254 signal_setting_t begin_signal_setting = NULL; 4255 signal_setting_t end_signal_setting = NULL; 4256 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4257 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4258 if (begin_signal_setting != NULL) { 4259 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4260 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4261 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4262 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4263 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4264 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4265 libjsig_is_loaded = true; 4266 if (os::Solaris::get_libjsig_version != NULL) { 4267 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4268 } 4269 assert(UseSignalChaining, "should enable signal-chaining"); 4270 } 4271 if (libjsig_is_loaded) { 4272 // Tell libjsig jvm is setting signal handlers 4273 (*begin_signal_setting)(); 4274 } 4275 4276 set_signal_handler(SIGSEGV, true, true); 4277 set_signal_handler(SIGPIPE, true, true); 4278 set_signal_handler(SIGXFSZ, true, true); 4279 set_signal_handler(SIGBUS, true, true); 4280 set_signal_handler(SIGILL, true, true); 4281 set_signal_handler(SIGFPE, true, true); 4282 4283 4284 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4285 4286 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4287 // can not register overridable signals which might be > 32 4288 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4289 // Tell libjsig jvm has finished setting signal handlers 4290 (*end_signal_setting)(); 4291 libjsigdone = true; 4292 } 4293 } 4294 4295 // Never ok to chain our SIGinterrupt 4296 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4297 set_signal_handler(os::Solaris::SIGasync(), true, true); 4298 4299 if (libjsig_is_loaded && !libjsigdone) { 4300 // Tell libjsig jvm finishes setting signal handlers 4301 (*end_signal_setting)(); 4302 } 4303 4304 // We don't activate signal checker if libjsig is in place, we trust ourselves 4305 // and if UserSignalHandler is installed all bets are off. 4306 // Log that signal checking is off only if -verbose:jni is specified. 4307 if (CheckJNICalls) { 4308 if (libjsig_is_loaded) { 4309 if (PrintJNIResolving) { 4310 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4311 } 4312 check_signals = false; 4313 } 4314 if (AllowUserSignalHandlers) { 4315 if (PrintJNIResolving) { 4316 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4317 } 4318 check_signals = false; 4319 } 4320 } 4321} 4322 4323 4324void report_error(const char* file_name, int line_no, const char* title, 4325 const char* format, ...); 4326 4327const char * signames[] = { 4328 "SIG0", 4329 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4330 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4331 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4332 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4333 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4334 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4335 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4336 "SIGCANCEL", "SIGLOST" 4337}; 4338 4339const char* os::exception_name(int exception_code, char* buf, size_t size) { 4340 if (0 < exception_code && exception_code <= SIGRTMAX) { 4341 // signal 4342 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4343 jio_snprintf(buf, size, "%s", signames[exception_code]); 4344 } else { 4345 jio_snprintf(buf, size, "SIG%d", exception_code); 4346 } 4347 return buf; 4348 } else { 4349 return NULL; 4350 } 4351} 4352 4353// (Static) wrapper for getisax(2) call. 4354os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4355 4356// (Static) wrappers for the liblgrp API 4357os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4358os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4359os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4360os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4361os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4362os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4363os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4364os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4365os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4366 4367// (Static) wrapper for meminfo() call. 4368os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4369 4370static address resolve_symbol_lazy(const char* name) { 4371 address addr = (address) dlsym(RTLD_DEFAULT, name); 4372 if (addr == NULL) { 4373 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4374 addr = (address) dlsym(RTLD_NEXT, name); 4375 } 4376 return addr; 4377} 4378 4379static address resolve_symbol(const char* name) { 4380 address addr = resolve_symbol_lazy(name); 4381 if (addr == NULL) { 4382 fatal(dlerror()); 4383 } 4384 return addr; 4385} 4386 4387void os::Solaris::libthread_init() { 4388 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4389 4390 lwp_priocntl_init(); 4391 4392 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4393 if (func == NULL) { 4394 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4395 // Guarantee that this VM is running on an new enough OS (5.6 or 4396 // later) that it will have a new enough libthread.so. 4397 guarantee(func != NULL, "libthread.so is too old."); 4398 } 4399 4400 int size; 4401 void (*handler_info_func)(address *, int *); 4402 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4403 handler_info_func(&handler_start, &size); 4404 handler_end = handler_start + size; 4405} 4406 4407 4408int_fnP_mutex_tP os::Solaris::_mutex_lock; 4409int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4410int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4411int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4412int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4413int os::Solaris::_mutex_scope = USYNC_THREAD; 4414 4415int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4416int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4417int_fnP_cond_tP os::Solaris::_cond_signal; 4418int_fnP_cond_tP os::Solaris::_cond_broadcast; 4419int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4420int_fnP_cond_tP os::Solaris::_cond_destroy; 4421int os::Solaris::_cond_scope = USYNC_THREAD; 4422 4423void os::Solaris::synchronization_init() { 4424 if (UseLWPSynchronization) { 4425 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4426 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4427 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4428 os::Solaris::set_mutex_init(lwp_mutex_init); 4429 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4430 os::Solaris::set_mutex_scope(USYNC_THREAD); 4431 4432 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4433 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4434 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4435 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4436 os::Solaris::set_cond_init(lwp_cond_init); 4437 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4438 os::Solaris::set_cond_scope(USYNC_THREAD); 4439 } else { 4440 os::Solaris::set_mutex_scope(USYNC_THREAD); 4441 os::Solaris::set_cond_scope(USYNC_THREAD); 4442 4443 if (UsePthreads) { 4444 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4445 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4446 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4447 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4448 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4449 4450 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4451 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4452 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4453 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4454 os::Solaris::set_cond_init(pthread_cond_default_init); 4455 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4456 } else { 4457 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4458 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4459 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4460 os::Solaris::set_mutex_init(::mutex_init); 4461 os::Solaris::set_mutex_destroy(::mutex_destroy); 4462 4463 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4464 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4465 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4466 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4467 os::Solaris::set_cond_init(::cond_init); 4468 os::Solaris::set_cond_destroy(::cond_destroy); 4469 } 4470 } 4471} 4472 4473bool os::Solaris::liblgrp_init() { 4474 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4475 if (handle != NULL) { 4476 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4477 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4478 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4479 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4480 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4481 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4482 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4483 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4484 dlsym(handle, "lgrp_cookie_stale"))); 4485 4486 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4487 set_lgrp_cookie(c); 4488 return true; 4489 } 4490 return false; 4491} 4492 4493void os::Solaris::misc_sym_init() { 4494 address func; 4495 4496 // getisax 4497 func = resolve_symbol_lazy("getisax"); 4498 if (func != NULL) { 4499 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4500 } 4501 4502 // meminfo 4503 func = resolve_symbol_lazy("meminfo"); 4504 if (func != NULL) { 4505 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4506 } 4507} 4508 4509uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4510 assert(_getisax != NULL, "_getisax not set"); 4511 return _getisax(array, n); 4512} 4513 4514// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4515typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4516static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4517 4518void init_pset_getloadavg_ptr(void) { 4519 pset_getloadavg_ptr = 4520 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4521 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4522 warning("pset_getloadavg function not found"); 4523 } 4524} 4525 4526int os::Solaris::_dev_zero_fd = -1; 4527 4528// this is called _before_ the global arguments have been parsed 4529void os::init(void) { 4530 _initial_pid = getpid(); 4531 4532 max_hrtime = first_hrtime = gethrtime(); 4533 4534 init_random(1234567); 4535 4536 page_size = sysconf(_SC_PAGESIZE); 4537 if (page_size == -1) { 4538 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4539 strerror(errno))); 4540 } 4541 init_page_sizes((size_t) page_size); 4542 4543 Solaris::initialize_system_info(); 4544 4545 // Initialize misc. symbols as soon as possible, so we can use them 4546 // if we need them. 4547 Solaris::misc_sym_init(); 4548 4549 int fd = ::open("/dev/zero", O_RDWR); 4550 if (fd < 0) { 4551 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4552 } else { 4553 Solaris::set_dev_zero_fd(fd); 4554 4555 // Close on exec, child won't inherit. 4556 fcntl(fd, F_SETFD, FD_CLOEXEC); 4557 } 4558 4559 clock_tics_per_sec = CLK_TCK; 4560 4561 // check if dladdr1() exists; dladdr1 can provide more information than 4562 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4563 // and is available on linker patches for 5.7 and 5.8. 4564 // libdl.so must have been loaded, this call is just an entry lookup 4565 void * hdl = dlopen("libdl.so", RTLD_NOW); 4566 if (hdl) { 4567 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4568 } 4569 4570 // (Solaris only) this switches to calls that actually do locking. 4571 ThreadCritical::initialize(); 4572 4573 main_thread = thr_self(); 4574 4575 // Constant minimum stack size allowed. It must be at least 4576 // the minimum of what the OS supports (thr_min_stack()), and 4577 // enough to allow the thread to get to user bytecode execution. 4578 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4579 // If the pagesize of the VM is greater than 8K determine the appropriate 4580 // number of initial guard pages. The user can change this with the 4581 // command line arguments, if needed. 4582 if (vm_page_size() > 8*K) { 4583 StackYellowPages = 1; 4584 StackRedPages = 1; 4585 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4586 } 4587} 4588 4589// To install functions for atexit system call 4590extern "C" { 4591 static void perfMemory_exit_helper() { 4592 perfMemory_exit(); 4593 } 4594} 4595 4596// this is called _after_ the global arguments have been parsed 4597jint os::init_2(void) { 4598 // try to enable extended file IO ASAP, see 6431278 4599 os::Solaris::try_enable_extended_io(); 4600 4601 // Allocate a single page and mark it as readable for safepoint polling. Also 4602 // use this first mmap call to check support for MAP_ALIGN. 4603 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4604 page_size, 4605 MAP_PRIVATE | MAP_ALIGN, 4606 PROT_READ); 4607 if (polling_page == NULL) { 4608 has_map_align = false; 4609 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4610 PROT_READ); 4611 } 4612 4613 os::set_polling_page(polling_page); 4614 4615#ifndef PRODUCT 4616 if (Verbose && PrintMiscellaneous) { 4617 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", 4618 (intptr_t)polling_page); 4619 } 4620#endif 4621 4622 if (!UseMembar) { 4623 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4624 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4625 os::set_memory_serialize_page(mem_serialize_page); 4626 4627#ifndef PRODUCT 4628 if (Verbose && PrintMiscellaneous) { 4629 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", 4630 (intptr_t)mem_serialize_page); 4631 } 4632#endif 4633 } 4634 4635 // Check minimum allowable stack size for thread creation and to initialize 4636 // the java system classes, including StackOverflowError - depends on page 4637 // size. Add a page for compiler2 recursion in main thread. 4638 // Add in 2*BytesPerWord times page size to account for VM stack during 4639 // class initialization depending on 32 or 64 bit VM. 4640 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4641 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4642 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4643 4644 size_t threadStackSizeInBytes = ThreadStackSize * K; 4645 if (threadStackSizeInBytes != 0 && 4646 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4647 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4648 os::Solaris::min_stack_allowed/K); 4649 return JNI_ERR; 4650 } 4651 4652 // For 64kbps there will be a 64kb page size, which makes 4653 // the usable default stack size quite a bit less. Increase the 4654 // stack for 64kb (or any > than 8kb) pages, this increases 4655 // virtual memory fragmentation (since we're not creating the 4656 // stack on a power of 2 boundary. The real fix for this 4657 // should be to fix the guard page mechanism. 4658 4659 if (vm_page_size() > 8*K) { 4660 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4661 ? threadStackSizeInBytes + 4662 ((StackYellowPages + StackRedPages) * vm_page_size()) 4663 : 0; 4664 ThreadStackSize = threadStackSizeInBytes/K; 4665 } 4666 4667 // Make the stack size a multiple of the page size so that 4668 // the yellow/red zones can be guarded. 4669 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4670 vm_page_size())); 4671 4672 Solaris::libthread_init(); 4673 4674 if (UseNUMA) { 4675 if (!Solaris::liblgrp_init()) { 4676 UseNUMA = false; 4677 } else { 4678 size_t lgrp_limit = os::numa_get_groups_num(); 4679 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4680 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4681 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 4682 if (lgrp_num < 2) { 4683 // There's only one locality group, disable NUMA. 4684 UseNUMA = false; 4685 } 4686 } 4687 if (!UseNUMA && ForceNUMA) { 4688 UseNUMA = true; 4689 } 4690 } 4691 4692 Solaris::signal_sets_init(); 4693 Solaris::init_signal_mem(); 4694 Solaris::install_signal_handlers(); 4695 4696 if (libjsigversion < JSIG_VERSION_1_4_1) { 4697 Maxlibjsigsigs = OLDMAXSIGNUM; 4698 } 4699 4700 // initialize synchronization primitives to use either thread or 4701 // lwp synchronization (controlled by UseLWPSynchronization) 4702 Solaris::synchronization_init(); 4703 4704 if (MaxFDLimit) { 4705 // set the number of file descriptors to max. print out error 4706 // if getrlimit/setrlimit fails but continue regardless. 4707 struct rlimit nbr_files; 4708 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4709 if (status != 0) { 4710 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4711 perror("os::init_2 getrlimit failed"); 4712 } 4713 } else { 4714 nbr_files.rlim_cur = nbr_files.rlim_max; 4715 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4716 if (status != 0) { 4717 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4718 perror("os::init_2 setrlimit failed"); 4719 } 4720 } 4721 } 4722 } 4723 4724 // Calculate theoretical max. size of Threads to guard gainst 4725 // artifical out-of-memory situations, where all available address- 4726 // space has been reserved by thread stacks. Default stack size is 1Mb. 4727 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4728 JavaThread::stack_size_at_create() : (1*K*K); 4729 assert(pre_thread_stack_size != 0, "Must have a stack"); 4730 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4731 // we should start doing Virtual Memory banging. Currently when the threads will 4732 // have used all but 200Mb of space. 4733 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4734 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4735 4736 // at-exit methods are called in the reverse order of their registration. 4737 // In Solaris 7 and earlier, atexit functions are called on return from 4738 // main or as a result of a call to exit(3C). There can be only 32 of 4739 // these functions registered and atexit() does not set errno. In Solaris 4740 // 8 and later, there is no limit to the number of functions registered 4741 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4742 // functions are called upon dlclose(3DL) in addition to return from main 4743 // and exit(3C). 4744 4745 if (PerfAllowAtExitRegistration) { 4746 // only register atexit functions if PerfAllowAtExitRegistration is set. 4747 // atexit functions can be delayed until process exit time, which 4748 // can be problematic for embedded VM situations. Embedded VMs should 4749 // call DestroyJavaVM() to assure that VM resources are released. 4750 4751 // note: perfMemory_exit_helper atexit function may be removed in 4752 // the future if the appropriate cleanup code can be added to the 4753 // VM_Exit VMOperation's doit method. 4754 if (atexit(perfMemory_exit_helper) != 0) { 4755 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4756 } 4757 } 4758 4759 // Init pset_loadavg function pointer 4760 init_pset_getloadavg_ptr(); 4761 4762 return JNI_OK; 4763} 4764 4765void os::init_3(void) { 4766 return; 4767} 4768 4769// Mark the polling page as unreadable 4770void os::make_polling_page_unreadable(void) { 4771 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4772 fatal("Could not disable polling page"); 4773 } 4774} 4775 4776// Mark the polling page as readable 4777void os::make_polling_page_readable(void) { 4778 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4779 fatal("Could not enable polling page"); 4780 } 4781} 4782 4783// OS interface. 4784 4785bool os::check_heap(bool force) { return true; } 4786 4787// Is a (classpath) directory empty? 4788bool os::dir_is_empty(const char* path) { 4789 DIR *dir = NULL; 4790 struct dirent *ptr; 4791 4792 dir = opendir(path); 4793 if (dir == NULL) return true; 4794 4795 // Scan the directory 4796 bool result = true; 4797 char buf[sizeof(struct dirent) + MAX_PATH]; 4798 struct dirent *dbuf = (struct dirent *) buf; 4799 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4800 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4801 result = false; 4802 } 4803 } 4804 closedir(dir); 4805 return result; 4806} 4807 4808// This code originates from JDK's sysOpen and open64_w 4809// from src/solaris/hpi/src/system_md.c 4810 4811int os::open(const char *path, int oflag, int mode) { 4812 if (strlen(path) > MAX_PATH - 1) { 4813 errno = ENAMETOOLONG; 4814 return -1; 4815 } 4816 int fd; 4817 4818 fd = ::open64(path, oflag, mode); 4819 if (fd == -1) return -1; 4820 4821 // If the open succeeded, the file might still be a directory 4822 { 4823 struct stat64 buf64; 4824 int ret = ::fstat64(fd, &buf64); 4825 int st_mode = buf64.st_mode; 4826 4827 if (ret != -1) { 4828 if ((st_mode & S_IFMT) == S_IFDIR) { 4829 errno = EISDIR; 4830 ::close(fd); 4831 return -1; 4832 } 4833 } else { 4834 ::close(fd); 4835 return -1; 4836 } 4837 } 4838 4839 // 32-bit Solaris systems suffer from: 4840 // 4841 // - an historical default soft limit of 256 per-process file 4842 // descriptors that is too low for many Java programs. 4843 // 4844 // - a design flaw where file descriptors created using stdio 4845 // fopen must be less than 256, _even_ when the first limit above 4846 // has been raised. This can cause calls to fopen (but not calls to 4847 // open, for example) to fail mysteriously, perhaps in 3rd party 4848 // native code (although the JDK itself uses fopen). One can hardly 4849 // criticize them for using this most standard of all functions. 4850 // 4851 // We attempt to make everything work anyways by: 4852 // 4853 // - raising the soft limit on per-process file descriptors beyond 4854 // 256 4855 // 4856 // - As of Solaris 10u4, we can request that Solaris raise the 256 4857 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4858 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4859 // 4860 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4861 // workaround the bug by remapping non-stdio file descriptors below 4862 // 256 to ones beyond 256, which is done below. 4863 // 4864 // See: 4865 // 1085341: 32-bit stdio routines should support file descriptors >255 4866 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4867 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4868 // enable_extended_FILE_stdio() in VM initialisation 4869 // Giri Mandalika's blog 4870 // http://technopark02.blogspot.com/2005_05_01_archive.html 4871 // 4872#ifndef _LP64 4873 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4874 int newfd = ::fcntl(fd, F_DUPFD, 256); 4875 if (newfd != -1) { 4876 ::close(fd); 4877 fd = newfd; 4878 } 4879 } 4880#endif // 32-bit Solaris 4881 4882 // All file descriptors that are opened in the JVM and not 4883 // specifically destined for a subprocess should have the 4884 // close-on-exec flag set. If we don't set it, then careless 3rd 4885 // party native code might fork and exec without closing all 4886 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4887 // UNIXProcess.c), and this in turn might: 4888 // 4889 // - cause end-of-file to fail to be detected on some file 4890 // descriptors, resulting in mysterious hangs, or 4891 // 4892 // - might cause an fopen in the subprocess to fail on a system 4893 // suffering from bug 1085341. 4894 // 4895 // (Yes, the default setting of the close-on-exec flag is a Unix 4896 // design flaw) 4897 // 4898 // See: 4899 // 1085341: 32-bit stdio routines should support file descriptors >255 4900 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4901 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4902 // 4903#ifdef FD_CLOEXEC 4904 { 4905 int flags = ::fcntl(fd, F_GETFD); 4906 if (flags != -1) { 4907 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4908 } 4909 } 4910#endif 4911 4912 return fd; 4913} 4914 4915// create binary file, rewriting existing file if required 4916int os::create_binary_file(const char* path, bool rewrite_existing) { 4917 int oflags = O_WRONLY | O_CREAT; 4918 if (!rewrite_existing) { 4919 oflags |= O_EXCL; 4920 } 4921 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4922} 4923 4924// return current position of file pointer 4925jlong os::current_file_offset(int fd) { 4926 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4927} 4928 4929// move file pointer to the specified offset 4930jlong os::seek_to_file_offset(int fd, jlong offset) { 4931 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4932} 4933 4934jlong os::lseek(int fd, jlong offset, int whence) { 4935 return (jlong) ::lseek64(fd, offset, whence); 4936} 4937 4938char * os::native_path(char *path) { 4939 return path; 4940} 4941 4942int os::ftruncate(int fd, jlong length) { 4943 return ::ftruncate64(fd, length); 4944} 4945 4946int os::fsync(int fd) { 4947 RESTARTABLE_RETURN_INT(::fsync(fd)); 4948} 4949 4950int os::available(int fd, jlong *bytes) { 4951 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4952 "Assumed _thread_in_native"); 4953 jlong cur, end; 4954 int mode; 4955 struct stat64 buf64; 4956 4957 if (::fstat64(fd, &buf64) >= 0) { 4958 mode = buf64.st_mode; 4959 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4960 int n,ioctl_return; 4961 4962 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4963 if (ioctl_return>= 0) { 4964 *bytes = n; 4965 return 1; 4966 } 4967 } 4968 } 4969 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4970 return 0; 4971 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4972 return 0; 4973 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4974 return 0; 4975 } 4976 *bytes = end - cur; 4977 return 1; 4978} 4979 4980// Map a block of memory. 4981char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4982 char *addr, size_t bytes, bool read_only, 4983 bool allow_exec) { 4984 int prot; 4985 int flags; 4986 4987 if (read_only) { 4988 prot = PROT_READ; 4989 flags = MAP_SHARED; 4990 } else { 4991 prot = PROT_READ | PROT_WRITE; 4992 flags = MAP_PRIVATE; 4993 } 4994 4995 if (allow_exec) { 4996 prot |= PROT_EXEC; 4997 } 4998 4999 if (addr != NULL) { 5000 flags |= MAP_FIXED; 5001 } 5002 5003 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5004 fd, file_offset); 5005 if (mapped_address == MAP_FAILED) { 5006 return NULL; 5007 } 5008 return mapped_address; 5009} 5010 5011 5012// Remap a block of memory. 5013char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5014 char *addr, size_t bytes, bool read_only, 5015 bool allow_exec) { 5016 // same as map_memory() on this OS 5017 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5018 allow_exec); 5019} 5020 5021 5022// Unmap a block of memory. 5023bool os::pd_unmap_memory(char* addr, size_t bytes) { 5024 return munmap(addr, bytes) == 0; 5025} 5026 5027void os::pause() { 5028 char filename[MAX_PATH]; 5029 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5030 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5031 } else { 5032 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5033 } 5034 5035 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5036 if (fd != -1) { 5037 struct stat buf; 5038 ::close(fd); 5039 while (::stat(filename, &buf) == 0) { 5040 (void)::poll(NULL, 0, 100); 5041 } 5042 } else { 5043 jio_fprintf(stderr, 5044 "Could not open pause file '%s', continuing immediately.\n", filename); 5045 } 5046} 5047 5048#ifndef PRODUCT 5049#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5050// Turn this on if you need to trace synch operations. 5051// Set RECORD_SYNCH_LIMIT to a large-enough value, 5052// and call record_synch_enable and record_synch_disable 5053// around the computation of interest. 5054 5055void record_synch(char* name, bool returning); // defined below 5056 5057class RecordSynch { 5058 char* _name; 5059 public: 5060 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 5061 ~RecordSynch() { record_synch(_name, true); } 5062}; 5063 5064#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5065extern "C" ret name params { \ 5066 typedef ret name##_t params; \ 5067 static name##_t* implem = NULL; \ 5068 static int callcount = 0; \ 5069 if (implem == NULL) { \ 5070 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5071 if (implem == NULL) fatal(dlerror()); \ 5072 } \ 5073 ++callcount; \ 5074 RecordSynch _rs(#name); \ 5075 inner; \ 5076 return implem args; \ 5077} 5078// in dbx, examine callcounts this way: 5079// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5080 5081#define CHECK_POINTER_OK(p) \ 5082 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5083#define CHECK_MU \ 5084 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5085#define CHECK_CV \ 5086 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5087#define CHECK_P(p) \ 5088 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5089 5090#define CHECK_MUTEX(mutex_op) \ 5091 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5092 5093CHECK_MUTEX( mutex_lock) 5094CHECK_MUTEX( _mutex_lock) 5095CHECK_MUTEX( mutex_unlock) 5096CHECK_MUTEX(_mutex_unlock) 5097CHECK_MUTEX( mutex_trylock) 5098CHECK_MUTEX(_mutex_trylock) 5099 5100#define CHECK_COND(cond_op) \ 5101 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 5102 5103CHECK_COND( cond_wait); 5104CHECK_COND(_cond_wait); 5105CHECK_COND(_cond_wait_cancel); 5106 5107#define CHECK_COND2(cond_op) \ 5108 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 5109 5110CHECK_COND2( cond_timedwait); 5111CHECK_COND2(_cond_timedwait); 5112CHECK_COND2(_cond_timedwait_cancel); 5113 5114// do the _lwp_* versions too 5115#define mutex_t lwp_mutex_t 5116#define cond_t lwp_cond_t 5117CHECK_MUTEX( _lwp_mutex_lock) 5118CHECK_MUTEX( _lwp_mutex_unlock) 5119CHECK_MUTEX( _lwp_mutex_trylock) 5120CHECK_MUTEX( __lwp_mutex_lock) 5121CHECK_MUTEX( __lwp_mutex_unlock) 5122CHECK_MUTEX( __lwp_mutex_trylock) 5123CHECK_MUTEX(___lwp_mutex_lock) 5124CHECK_MUTEX(___lwp_mutex_unlock) 5125 5126CHECK_COND( _lwp_cond_wait); 5127CHECK_COND( __lwp_cond_wait); 5128CHECK_COND(___lwp_cond_wait); 5129 5130CHECK_COND2( _lwp_cond_timedwait); 5131CHECK_COND2( __lwp_cond_timedwait); 5132#undef mutex_t 5133#undef cond_t 5134 5135CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5136CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5137CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5138CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5139CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5140CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5141CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5142CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5143 5144 5145// recording machinery: 5146 5147enum { RECORD_SYNCH_LIMIT = 200 }; 5148char* record_synch_name[RECORD_SYNCH_LIMIT]; 5149void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5150bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5151thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5152int record_synch_count = 0; 5153bool record_synch_enabled = false; 5154 5155// in dbx, examine recorded data this way: 5156// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5157 5158void record_synch(char* name, bool returning) { 5159 if (record_synch_enabled) { 5160 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5161 record_synch_name[record_synch_count] = name; 5162 record_synch_returning[record_synch_count] = returning; 5163 record_synch_thread[record_synch_count] = thr_self(); 5164 record_synch_arg0ptr[record_synch_count] = &name; 5165 record_synch_count++; 5166 } 5167 // put more checking code here: 5168 // ... 5169 } 5170} 5171 5172void record_synch_enable() { 5173 // start collecting trace data, if not already doing so 5174 if (!record_synch_enabled) record_synch_count = 0; 5175 record_synch_enabled = true; 5176} 5177 5178void record_synch_disable() { 5179 // stop collecting trace data 5180 record_synch_enabled = false; 5181} 5182 5183#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5184#endif // PRODUCT 5185 5186const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5187const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5188 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5189 5190 5191// JVMTI & JVM monitoring and management support 5192// The thread_cpu_time() and current_thread_cpu_time() are only 5193// supported if is_thread_cpu_time_supported() returns true. 5194// They are not supported on Solaris T1. 5195 5196// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5197// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5198// of a thread. 5199// 5200// current_thread_cpu_time() and thread_cpu_time(Thread *) 5201// returns the fast estimate available on the platform. 5202 5203// hrtime_t gethrvtime() return value includes 5204// user time but does not include system time 5205jlong os::current_thread_cpu_time() { 5206 return (jlong) gethrvtime(); 5207} 5208 5209jlong os::thread_cpu_time(Thread *thread) { 5210 // return user level CPU time only to be consistent with 5211 // what current_thread_cpu_time returns. 5212 // thread_cpu_time_info() must be changed if this changes 5213 return os::thread_cpu_time(thread, false /* user time only */); 5214} 5215 5216jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5217 if (user_sys_cpu_time) { 5218 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5219 } else { 5220 return os::current_thread_cpu_time(); 5221 } 5222} 5223 5224jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5225 char proc_name[64]; 5226 int count; 5227 prusage_t prusage; 5228 jlong lwp_time; 5229 int fd; 5230 5231 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5232 getpid(), 5233 thread->osthread()->lwp_id()); 5234 fd = ::open(proc_name, O_RDONLY); 5235 if (fd == -1) return -1; 5236 5237 do { 5238 count = ::pread(fd, 5239 (void *)&prusage.pr_utime, 5240 thr_time_size, 5241 thr_time_off); 5242 } while (count < 0 && errno == EINTR); 5243 ::close(fd); 5244 if (count < 0) return -1; 5245 5246 if (user_sys_cpu_time) { 5247 // user + system CPU time 5248 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5249 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5250 (jlong)prusage.pr_stime.tv_nsec + 5251 (jlong)prusage.pr_utime.tv_nsec; 5252 } else { 5253 // user level CPU time only 5254 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5255 (jlong)prusage.pr_utime.tv_nsec; 5256 } 5257 5258 return (lwp_time); 5259} 5260 5261void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5262 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5263 info_ptr->may_skip_backward = false; // elapsed time not wall time 5264 info_ptr->may_skip_forward = false; // elapsed time not wall time 5265 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5266} 5267 5268void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5269 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5270 info_ptr->may_skip_backward = false; // elapsed time not wall time 5271 info_ptr->may_skip_forward = false; // elapsed time not wall time 5272 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5273} 5274 5275bool os::is_thread_cpu_time_supported() { 5276 return true; 5277} 5278 5279// System loadavg support. Returns -1 if load average cannot be obtained. 5280// Return the load average for our processor set if the primitive exists 5281// (Solaris 9 and later). Otherwise just return system wide loadavg. 5282int os::loadavg(double loadavg[], int nelem) { 5283 if (pset_getloadavg_ptr != NULL) { 5284 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5285 } else { 5286 return ::getloadavg(loadavg, nelem); 5287 } 5288} 5289 5290//--------------------------------------------------------------------------------- 5291 5292bool os::find(address addr, outputStream* st) { 5293 Dl_info dlinfo; 5294 memset(&dlinfo, 0, sizeof(dlinfo)); 5295 if (dladdr(addr, &dlinfo) != 0) { 5296 st->print(PTR_FORMAT ": ", addr); 5297 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5298 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5299 } else if (dlinfo.dli_fbase != NULL) { 5300 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5301 } else { 5302 st->print("<absolute address>"); 5303 } 5304 if (dlinfo.dli_fname != NULL) { 5305 st->print(" in %s", dlinfo.dli_fname); 5306 } 5307 if (dlinfo.dli_fbase != NULL) { 5308 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5309 } 5310 st->cr(); 5311 5312 if (Verbose) { 5313 // decode some bytes around the PC 5314 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5315 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5316 address lowest = (address) dlinfo.dli_sname; 5317 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5318 if (begin < lowest) begin = lowest; 5319 Dl_info dlinfo2; 5320 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5321 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5322 end = (address) dlinfo2.dli_saddr; 5323 } 5324 Disassembler::decode(begin, end, st); 5325 } 5326 return true; 5327 } 5328 return false; 5329} 5330 5331// Following function has been added to support HotSparc's libjvm.so running 5332// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5333// src/solaris/hpi/native_threads in the EVM codebase. 5334// 5335// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5336// libraries and should thus be removed. We will leave it behind for a while 5337// until we no longer want to able to run on top of 1.3.0 Solaris production 5338// JDK. See 4341971. 5339 5340#define STACK_SLACK 0x800 5341 5342extern "C" { 5343 intptr_t sysThreadAvailableStackWithSlack() { 5344 stack_t st; 5345 intptr_t retval, stack_top; 5346 retval = thr_stksegment(&st); 5347 assert(retval == 0, "incorrect return value from thr_stksegment"); 5348 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5349 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5350 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5351 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5352 } 5353} 5354 5355// ObjectMonitor park-unpark infrastructure ... 5356// 5357// We implement Solaris and Linux PlatformEvents with the 5358// obvious condvar-mutex-flag triple. 5359// Another alternative that works quite well is pipes: 5360// Each PlatformEvent consists of a pipe-pair. 5361// The thread associated with the PlatformEvent 5362// calls park(), which reads from the input end of the pipe. 5363// Unpark() writes into the other end of the pipe. 5364// The write-side of the pipe must be set NDELAY. 5365// Unfortunately pipes consume a large # of handles. 5366// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5367// Using pipes for the 1st few threads might be workable, however. 5368// 5369// park() is permitted to return spuriously. 5370// Callers of park() should wrap the call to park() in 5371// an appropriate loop. A litmus test for the correct 5372// usage of park is the following: if park() were modified 5373// to immediately return 0 your code should still work, 5374// albeit degenerating to a spin loop. 5375// 5376// In a sense, park()-unpark() just provides more polite spinning 5377// and polling with the key difference over naive spinning being 5378// that a parked thread needs to be explicitly unparked() in order 5379// to wake up and to poll the underlying condition. 5380// 5381// Assumption: 5382// Only one parker can exist on an event, which is why we allocate 5383// them per-thread. Multiple unparkers can coexist. 5384// 5385// _Event transitions in park() 5386// -1 => -1 : illegal 5387// 1 => 0 : pass - return immediately 5388// 0 => -1 : block; then set _Event to 0 before returning 5389// 5390// _Event transitions in unpark() 5391// 0 => 1 : just return 5392// 1 => 1 : just return 5393// -1 => either 0 or 1; must signal target thread 5394// That is, we can safely transition _Event from -1 to either 5395// 0 or 1. 5396// 5397// _Event serves as a restricted-range semaphore. 5398// -1 : thread is blocked, i.e. there is a waiter 5399// 0 : neutral: thread is running or ready, 5400// could have been signaled after a wait started 5401// 1 : signaled - thread is running or ready 5402// 5403// Another possible encoding of _Event would be with 5404// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5405// 5406// TODO-FIXME: add DTRACE probes for: 5407// 1. Tx parks 5408// 2. Ty unparks Tx 5409// 3. Tx resumes from park 5410 5411 5412// value determined through experimentation 5413#define ROUNDINGFIX 11 5414 5415// utility to compute the abstime argument to timedwait. 5416// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5417 5418static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5419 // millis is the relative timeout time 5420 // abstime will be the absolute timeout time 5421 if (millis < 0) millis = 0; 5422 struct timeval now; 5423 int status = gettimeofday(&now, NULL); 5424 assert(status == 0, "gettimeofday"); 5425 jlong seconds = millis / 1000; 5426 jlong max_wait_period; 5427 5428 if (UseLWPSynchronization) { 5429 // forward port of fix for 4275818 (not sleeping long enough) 5430 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5431 // _lwp_cond_timedwait() used a round_down algorithm rather 5432 // than a round_up. For millis less than our roundfactor 5433 // it rounded down to 0 which doesn't meet the spec. 5434 // For millis > roundfactor we may return a bit sooner, but 5435 // since we can not accurately identify the patch level and 5436 // this has already been fixed in Solaris 9 and 8 we will 5437 // leave it alone rather than always rounding down. 5438 5439 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5440 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5441 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5442 max_wait_period = 21000000; 5443 } else { 5444 max_wait_period = 50000000; 5445 } 5446 millis %= 1000; 5447 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5448 seconds = max_wait_period; 5449 } 5450 abstime->tv_sec = now.tv_sec + seconds; 5451 long usec = now.tv_usec + millis * 1000; 5452 if (usec >= 1000000) { 5453 abstime->tv_sec += 1; 5454 usec -= 1000000; 5455 } 5456 abstime->tv_nsec = usec * 1000; 5457 return abstime; 5458} 5459 5460void os::PlatformEvent::park() { // AKA: down() 5461 // Transitions for _Event: 5462 // -1 => -1 : illegal 5463 // 1 => 0 : pass - return immediately 5464 // 0 => -1 : block; then set _Event to 0 before returning 5465 5466 // Invariant: Only the thread associated with the Event/PlatformEvent 5467 // may call park(). 5468 assert(_nParked == 0, "invariant"); 5469 5470 int v; 5471 for (;;) { 5472 v = _Event; 5473 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5474 } 5475 guarantee(v >= 0, "invariant"); 5476 if (v == 0) { 5477 // Do this the hard way by blocking ... 5478 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5479 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5480 // Only for SPARC >= V8PlusA 5481#if defined(__sparc) && defined(COMPILER2) 5482 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5483#endif 5484 int status = os::Solaris::mutex_lock(_mutex); 5485 assert_status(status == 0, status, "mutex_lock"); 5486 guarantee(_nParked == 0, "invariant"); 5487 ++_nParked; 5488 while (_Event < 0) { 5489 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5490 // Treat this the same as if the wait was interrupted 5491 // With usr/lib/lwp going to kernel, always handle ETIME 5492 status = os::Solaris::cond_wait(_cond, _mutex); 5493 if (status == ETIME) status = EINTR; 5494 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5495 } 5496 --_nParked; 5497 _Event = 0; 5498 status = os::Solaris::mutex_unlock(_mutex); 5499 assert_status(status == 0, status, "mutex_unlock"); 5500 // Paranoia to ensure our locked and lock-free paths interact 5501 // correctly with each other. 5502 OrderAccess::fence(); 5503 } 5504} 5505 5506int os::PlatformEvent::park(jlong millis) { 5507 // Transitions for _Event: 5508 // -1 => -1 : illegal 5509 // 1 => 0 : pass - return immediately 5510 // 0 => -1 : block; then set _Event to 0 before returning 5511 5512 guarantee(_nParked == 0, "invariant"); 5513 int v; 5514 for (;;) { 5515 v = _Event; 5516 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5517 } 5518 guarantee(v >= 0, "invariant"); 5519 if (v != 0) return OS_OK; 5520 5521 int ret = OS_TIMEOUT; 5522 timestruc_t abst; 5523 compute_abstime(&abst, millis); 5524 5525 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5526 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5527 // Only for SPARC >= V8PlusA 5528#if defined(__sparc) && defined(COMPILER2) 5529 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5530#endif 5531 int status = os::Solaris::mutex_lock(_mutex); 5532 assert_status(status == 0, status, "mutex_lock"); 5533 guarantee(_nParked == 0, "invariant"); 5534 ++_nParked; 5535 while (_Event < 0) { 5536 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5537 assert_status(status == 0 || status == EINTR || 5538 status == ETIME || status == ETIMEDOUT, 5539 status, "cond_timedwait"); 5540 if (!FilterSpuriousWakeups) break; // previous semantics 5541 if (status == ETIME || status == ETIMEDOUT) break; 5542 // We consume and ignore EINTR and spurious wakeups. 5543 } 5544 --_nParked; 5545 if (_Event >= 0) ret = OS_OK; 5546 _Event = 0; 5547 status = os::Solaris::mutex_unlock(_mutex); 5548 assert_status(status == 0, status, "mutex_unlock"); 5549 // Paranoia to ensure our locked and lock-free paths interact 5550 // correctly with each other. 5551 OrderAccess::fence(); 5552 return ret; 5553} 5554 5555void os::PlatformEvent::unpark() { 5556 // Transitions for _Event: 5557 // 0 => 1 : just return 5558 // 1 => 1 : just return 5559 // -1 => either 0 or 1; must signal target thread 5560 // That is, we can safely transition _Event from -1 to either 5561 // 0 or 1. 5562 // See also: "Semaphores in Plan 9" by Mullender & Cox 5563 // 5564 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5565 // that it will take two back-to-back park() calls for the owning 5566 // thread to block. This has the benefit of forcing a spurious return 5567 // from the first park() call after an unpark() call which will help 5568 // shake out uses of park() and unpark() without condition variables. 5569 5570 if (Atomic::xchg(1, &_Event) >= 0) return; 5571 5572 // If the thread associated with the event was parked, wake it. 5573 // Wait for the thread assoc with the PlatformEvent to vacate. 5574 int status = os::Solaris::mutex_lock(_mutex); 5575 assert_status(status == 0, status, "mutex_lock"); 5576 int AnyWaiters = _nParked; 5577 status = os::Solaris::mutex_unlock(_mutex); 5578 assert_status(status == 0, status, "mutex_unlock"); 5579 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5580 if (AnyWaiters != 0) { 5581 // Note that we signal() *after* dropping the lock for "immortal" Events. 5582 // This is safe and avoids a common class of futile wakeups. In rare 5583 // circumstances this can cause a thread to return prematurely from 5584 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5585 // will simply re-test the condition and re-park itself. 5586 // This provides particular benefit if the underlying platform does not 5587 // provide wait morphing. 5588 status = os::Solaris::cond_signal(_cond); 5589 assert_status(status == 0, status, "cond_signal"); 5590 } 5591} 5592 5593// JSR166 5594// ------------------------------------------------------- 5595 5596// The solaris and linux implementations of park/unpark are fairly 5597// conservative for now, but can be improved. They currently use a 5598// mutex/condvar pair, plus _counter. 5599// Park decrements _counter if > 0, else does a condvar wait. Unpark 5600// sets count to 1 and signals condvar. Only one thread ever waits 5601// on the condvar. Contention seen when trying to park implies that someone 5602// is unparking you, so don't wait. And spurious returns are fine, so there 5603// is no need to track notifications. 5604 5605#define MAX_SECS 100000000 5606 5607// This code is common to linux and solaris and will be moved to a 5608// common place in dolphin. 5609// 5610// The passed in time value is either a relative time in nanoseconds 5611// or an absolute time in milliseconds. Either way it has to be unpacked 5612// into suitable seconds and nanoseconds components and stored in the 5613// given timespec structure. 5614// Given time is a 64-bit value and the time_t used in the timespec is only 5615// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5616// overflow if times way in the future are given. Further on Solaris versions 5617// prior to 10 there is a restriction (see cond_timedwait) that the specified 5618// number of seconds, in abstime, is less than current_time + 100,000,000. 5619// As it will be 28 years before "now + 100000000" will overflow we can 5620// ignore overflow and just impose a hard-limit on seconds using the value 5621// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5622// years from "now". 5623// 5624static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5625 assert(time > 0, "convertTime"); 5626 5627 struct timeval now; 5628 int status = gettimeofday(&now, NULL); 5629 assert(status == 0, "gettimeofday"); 5630 5631 time_t max_secs = now.tv_sec + MAX_SECS; 5632 5633 if (isAbsolute) { 5634 jlong secs = time / 1000; 5635 if (secs > max_secs) { 5636 absTime->tv_sec = max_secs; 5637 } else { 5638 absTime->tv_sec = secs; 5639 } 5640 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5641 } else { 5642 jlong secs = time / NANOSECS_PER_SEC; 5643 if (secs >= MAX_SECS) { 5644 absTime->tv_sec = max_secs; 5645 absTime->tv_nsec = 0; 5646 } else { 5647 absTime->tv_sec = now.tv_sec + secs; 5648 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5649 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5650 absTime->tv_nsec -= NANOSECS_PER_SEC; 5651 ++absTime->tv_sec; // note: this must be <= max_secs 5652 } 5653 } 5654 } 5655 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5656 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5657 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5658 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5659} 5660 5661void Parker::park(bool isAbsolute, jlong time) { 5662 // Ideally we'd do something useful while spinning, such 5663 // as calling unpackTime(). 5664 5665 // Optional fast-path check: 5666 // Return immediately if a permit is available. 5667 // We depend on Atomic::xchg() having full barrier semantics 5668 // since we are doing a lock-free update to _counter. 5669 if (Atomic::xchg(0, &_counter) > 0) return; 5670 5671 // Optional fast-exit: Check interrupt before trying to wait 5672 Thread* thread = Thread::current(); 5673 assert(thread->is_Java_thread(), "Must be JavaThread"); 5674 JavaThread *jt = (JavaThread *)thread; 5675 if (Thread::is_interrupted(thread, false)) { 5676 return; 5677 } 5678 5679 // First, demultiplex/decode time arguments 5680 timespec absTime; 5681 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5682 return; 5683 } 5684 if (time > 0) { 5685 // Warning: this code might be exposed to the old Solaris time 5686 // round-down bugs. Grep "roundingFix" for details. 5687 unpackTime(&absTime, isAbsolute, time); 5688 } 5689 5690 // Enter safepoint region 5691 // Beware of deadlocks such as 6317397. 5692 // The per-thread Parker:: _mutex is a classic leaf-lock. 5693 // In particular a thread must never block on the Threads_lock while 5694 // holding the Parker:: mutex. If safepoints are pending both the 5695 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5696 ThreadBlockInVM tbivm(jt); 5697 5698 // Don't wait if cannot get lock since interference arises from 5699 // unblocking. Also. check interrupt before trying wait 5700 if (Thread::is_interrupted(thread, false) || 5701 os::Solaris::mutex_trylock(_mutex) != 0) { 5702 return; 5703 } 5704 5705 int status; 5706 5707 if (_counter > 0) { // no wait needed 5708 _counter = 0; 5709 status = os::Solaris::mutex_unlock(_mutex); 5710 assert(status == 0, "invariant"); 5711 // Paranoia to ensure our locked and lock-free paths interact 5712 // correctly with each other and Java-level accesses. 5713 OrderAccess::fence(); 5714 return; 5715 } 5716 5717#ifdef ASSERT 5718 // Don't catch signals while blocked; let the running threads have the signals. 5719 // (This allows a debugger to break into the running thread.) 5720 sigset_t oldsigs; 5721 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5722 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5723#endif 5724 5725 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5726 jt->set_suspend_equivalent(); 5727 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5728 5729 // Do this the hard way by blocking ... 5730 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5731 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5732 // Only for SPARC >= V8PlusA 5733#if defined(__sparc) && defined(COMPILER2) 5734 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5735#endif 5736 5737 if (time == 0) { 5738 status = os::Solaris::cond_wait(_cond, _mutex); 5739 } else { 5740 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5741 } 5742 // Note that an untimed cond_wait() can sometimes return ETIME on older 5743 // versions of the Solaris. 5744 assert_status(status == 0 || status == EINTR || 5745 status == ETIME || status == ETIMEDOUT, 5746 status, "cond_timedwait"); 5747 5748#ifdef ASSERT 5749 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5750#endif 5751 _counter = 0; 5752 status = os::Solaris::mutex_unlock(_mutex); 5753 assert_status(status == 0, status, "mutex_unlock"); 5754 // Paranoia to ensure our locked and lock-free paths interact 5755 // correctly with each other and Java-level accesses. 5756 OrderAccess::fence(); 5757 5758 // If externally suspended while waiting, re-suspend 5759 if (jt->handle_special_suspend_equivalent_condition()) { 5760 jt->java_suspend_self(); 5761 } 5762} 5763 5764void Parker::unpark() { 5765 int status = os::Solaris::mutex_lock(_mutex); 5766 assert(status == 0, "invariant"); 5767 const int s = _counter; 5768 _counter = 1; 5769 status = os::Solaris::mutex_unlock(_mutex); 5770 assert(status == 0, "invariant"); 5771 5772 if (s < 1) { 5773 status = os::Solaris::cond_signal(_cond); 5774 assert(status == 0, "invariant"); 5775 } 5776} 5777 5778extern char** environ; 5779 5780// Run the specified command in a separate process. Return its exit value, 5781// or -1 on failure (e.g. can't fork a new process). 5782// Unlike system(), this function can be called from signal handler. It 5783// doesn't block SIGINT et al. 5784int os::fork_and_exec(char* cmd) { 5785 char * argv[4]; 5786 argv[0] = (char *)"sh"; 5787 argv[1] = (char *)"-c"; 5788 argv[2] = cmd; 5789 argv[3] = NULL; 5790 5791 // fork is async-safe, fork1 is not so can't use in signal handler 5792 pid_t pid; 5793 Thread* t = ThreadLocalStorage::get_thread_slow(); 5794 if (t != NULL && t->is_inside_signal_handler()) { 5795 pid = fork(); 5796 } else { 5797 pid = fork1(); 5798 } 5799 5800 if (pid < 0) { 5801 // fork failed 5802 warning("fork failed: %s", strerror(errno)); 5803 return -1; 5804 5805 } else if (pid == 0) { 5806 // child process 5807 5808 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5809 execve("/usr/bin/sh", argv, environ); 5810 5811 // execve failed 5812 _exit(-1); 5813 5814 } else { 5815 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5816 // care about the actual exit code, for now. 5817 5818 int status; 5819 5820 // Wait for the child process to exit. This returns immediately if 5821 // the child has already exited. */ 5822 while (waitpid(pid, &status, 0) < 0) { 5823 switch (errno) { 5824 case ECHILD: return 0; 5825 case EINTR: break; 5826 default: return -1; 5827 } 5828 } 5829 5830 if (WIFEXITED(status)) { 5831 // The child exited normally; get its exit code. 5832 return WEXITSTATUS(status); 5833 } else if (WIFSIGNALED(status)) { 5834 // The child exited because of a signal 5835 // The best value to return is 0x80 + signal number, 5836 // because that is what all Unix shells do, and because 5837 // it allows callers to distinguish between process exit and 5838 // process death by signal. 5839 return 0x80 + WTERMSIG(status); 5840 } else { 5841 // Unknown exit code; pass it through 5842 return status; 5843 } 5844 } 5845} 5846 5847// is_headless_jre() 5848// 5849// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5850// in order to report if we are running in a headless jre 5851// 5852// Since JDK8 xawt/libmawt.so was moved into the same directory 5853// as libawt.so, and renamed libawt_xawt.so 5854// 5855bool os::is_headless_jre() { 5856 struct stat statbuf; 5857 char buf[MAXPATHLEN]; 5858 char libmawtpath[MAXPATHLEN]; 5859 const char *xawtstr = "/xawt/libmawt.so"; 5860 const char *new_xawtstr = "/libawt_xawt.so"; 5861 char *p; 5862 5863 // Get path to libjvm.so 5864 os::jvm_path(buf, sizeof(buf)); 5865 5866 // Get rid of libjvm.so 5867 p = strrchr(buf, '/'); 5868 if (p == NULL) { 5869 return false; 5870 } else { 5871 *p = '\0'; 5872 } 5873 5874 // Get rid of client or server 5875 p = strrchr(buf, '/'); 5876 if (p == NULL) { 5877 return false; 5878 } else { 5879 *p = '\0'; 5880 } 5881 5882 // check xawt/libmawt.so 5883 strcpy(libmawtpath, buf); 5884 strcat(libmawtpath, xawtstr); 5885 if (::stat(libmawtpath, &statbuf) == 0) return false; 5886 5887 // check libawt_xawt.so 5888 strcpy(libmawtpath, buf); 5889 strcat(libmawtpath, new_xawtstr); 5890 if (::stat(libmawtpath, &statbuf) == 0) return false; 5891 5892 return true; 5893} 5894 5895size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5896 size_t res; 5897 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5898 "Assumed _thread_in_native"); 5899 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5900 return res; 5901} 5902 5903int os::close(int fd) { 5904 return ::close(fd); 5905} 5906 5907int os::socket_close(int fd) { 5908 return ::close(fd); 5909} 5910 5911int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5912 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5913 "Assumed _thread_in_native"); 5914 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5915} 5916 5917int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5918 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5919 "Assumed _thread_in_native"); 5920 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5921} 5922 5923int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5924 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5925} 5926 5927// As both poll and select can be interrupted by signals, we have to be 5928// prepared to restart the system call after updating the timeout, unless 5929// a poll() is done with timeout == -1, in which case we repeat with this 5930// "wait forever" value. 5931 5932int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5933 int _result; 5934 _result = ::connect(fd, him, len); 5935 5936 // On Solaris, when a connect() call is interrupted, the connection 5937 // can be established asynchronously (see 6343810). Subsequent calls 5938 // to connect() must check the errno value which has the semantic 5939 // described below (copied from the connect() man page). Handling 5940 // of asynchronously established connections is required for both 5941 // blocking and non-blocking sockets. 5942 // EINTR The connection attempt was interrupted 5943 // before any data arrived by the delivery of 5944 // a signal. The connection, however, will be 5945 // established asynchronously. 5946 // 5947 // EINPROGRESS The socket is non-blocking, and the connec- 5948 // tion cannot be completed immediately. 5949 // 5950 // EALREADY The socket is non-blocking, and a previous 5951 // connection attempt has not yet been com- 5952 // pleted. 5953 // 5954 // EISCONN The socket is already connected. 5955 if (_result == OS_ERR && errno == EINTR) { 5956 // restarting a connect() changes its errno semantics 5957 RESTARTABLE(::connect(fd, him, len), _result); 5958 // undo these changes 5959 if (_result == OS_ERR) { 5960 if (errno == EALREADY) { 5961 errno = EINPROGRESS; // fall through 5962 } else if (errno == EISCONN) { 5963 errno = 0; 5964 return OS_OK; 5965 } 5966 } 5967 } 5968 return _result; 5969} 5970 5971// Get the default path to the core file 5972// Returns the length of the string 5973int os::get_core_path(char* buffer, size_t bufferSize) { 5974 const char* p = get_current_directory(buffer, bufferSize); 5975 5976 if (p == NULL) { 5977 assert(p != NULL, "failed to get current directory"); 5978 return 0; 5979 } 5980 5981 return strlen(buffer); 5982} 5983 5984#ifndef PRODUCT 5985void TestReserveMemorySpecial_test() { 5986 // No tests available for this platform 5987} 5988#endif 5989