os_solaris.cpp revision 5872:b59507f713e0
1169689Skan/* 2169689Skan * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3169689Skan * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4169689Skan * 5169689Skan * This code is free software; you can redistribute it and/or modify it 6169689Skan * under the terms of the GNU General Public License version 2 only, as 7169689Skan * published by the Free Software Foundation. 8169689Skan * 9169689Skan * This code is distributed in the hope that it will be useful, but WITHOUT 10169689Skan * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11169689Skan * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12169689Skan * version 2 for more details (a copy is included in the LICENSE file that 13169689Skan * accompanied this code). 14169689Skan * 15169689Skan * You should have received a copy of the GNU General Public License version 16169689Skan * 2 along with this work; if not, write to the Free Software Foundation, 17169689Skan * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18169689Skan * 19169689Skan * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20169689Skan * or visit www.oracle.com if you need additional information or have any 21169689Skan * questions. 22169689Skan * 23169689Skan */ 24169689Skan 25169689Skan// no precompiled headers 26169689Skan#include "classfile/classLoader.hpp" 27169689Skan#include "classfile/systemDictionary.hpp" 28169689Skan#include "classfile/vmSymbols.hpp" 29169689Skan#include "code/icBuffer.hpp" 30169689Skan#include "code/vtableStubs.hpp" 31169689Skan#include "compiler/compileBroker.hpp" 32169689Skan#include "compiler/disassembler.hpp" 33169689Skan#include "interpreter/interpreter.hpp" 34169689Skan#include "jvm_solaris.h" 35169689Skan#include "memory/allocation.inline.hpp" 36169689Skan#include "memory/filemap.hpp" 37169689Skan#include "mutex_solaris.inline.hpp" 38169689Skan#include "oops/oop.inline.hpp" 39169689Skan#include "os_share_solaris.hpp" 40169689Skan#include "prims/jniFastGetField.hpp" 41169689Skan#include "prims/jvm.h" 42169689Skan#include "prims/jvm_misc.hpp" 43169689Skan#include "runtime/arguments.hpp" 44169689Skan#include "runtime/extendedPC.hpp" 45169689Skan#include "runtime/globals.hpp" 46169689Skan#include "runtime/interfaceSupport.hpp" 47169689Skan#include "runtime/java.hpp" 48169689Skan#include "runtime/javaCalls.hpp" 49169689Skan#include "runtime/mutexLocker.hpp" 50169689Skan#include "runtime/objectMonitor.hpp" 51169689Skan#include "runtime/osThread.hpp" 52169689Skan#include "runtime/perfMemory.hpp" 53169689Skan#include "runtime/sharedRuntime.hpp" 54169689Skan#include "runtime/statSampler.hpp" 55169689Skan#include "runtime/stubRoutines.hpp" 56169689Skan#include "runtime/thread.inline.hpp" 57169689Skan#include "runtime/threadCritical.hpp" 58169689Skan#include "runtime/timer.hpp" 59169689Skan#include "services/attachListener.hpp" 60169689Skan#include "services/memTracker.hpp" 61169689Skan#include "services/runtimeService.hpp" 62169689Skan#include "utilities/decoder.hpp" 63169689Skan#include "utilities/defaultStream.hpp" 64169689Skan#include "utilities/events.hpp" 65169689Skan#include "utilities/growableArray.hpp" 66169689Skan#include "utilities/vmError.hpp" 67169689Skan 68169689Skan// put OS-includes here 69169689Skan# include <dlfcn.h> 70169689Skan# include <errno.h> 71169689Skan# include <exception> 72169689Skan# include <link.h> 73169689Skan# include <poll.h> 74169689Skan# include <pthread.h> 75169689Skan# include <pwd.h> 76169689Skan# include <schedctl.h> 77169689Skan# include <setjmp.h> 78169689Skan# include <signal.h> 79169689Skan# include <stdio.h> 80169689Skan# include <alloca.h> 81169689Skan# include <sys/filio.h> 82169689Skan# include <sys/ipc.h> 83169689Skan# include <sys/lwp.h> 84169689Skan# include <sys/machelf.h> // for elf Sym structure used by dladdr1 85169689Skan# include <sys/mman.h> 86169689Skan# include <sys/processor.h> 87169689Skan# include <sys/procset.h> 88169689Skan# include <sys/pset.h> 89169689Skan# include <sys/resource.h> 90169689Skan# include <sys/shm.h> 91169689Skan# include <sys/socket.h> 92169689Skan# include <sys/stat.h> 93169689Skan# include <sys/systeminfo.h> 94169689Skan# include <sys/time.h> 95169689Skan# include <sys/times.h> 96169689Skan# include <sys/types.h> 97169689Skan# include <sys/wait.h> 98169689Skan# include <sys/utsname.h> 99169689Skan# include <thread.h> 100169689Skan# include <unistd.h> 101169689Skan# include <sys/priocntl.h> 102169689Skan# include <sys/rtpriocntl.h> 103169689Skan# include <sys/tspriocntl.h> 104169689Skan# include <sys/iapriocntl.h> 105169689Skan# include <sys/fxpriocntl.h> 106169689Skan# include <sys/loadavg.h> 107169689Skan# include <string.h> 108169689Skan# include <stdio.h> 109169689Skan 110169689Skan# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 111169689Skan# include <sys/procfs.h> // see comment in <sys/procfs.h> 112169689Skan 113169689Skan#define MAX_PATH (2 * K) 114169689Skan 115169689Skan// for timer info max values which include all bits 116169689Skan#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 117169689Skan 118169689Skan 119220150Smm// Here are some liblgrp types from sys/lgrp_user.h to be able to 120220150Smm// compile on older systems without this header file. 121220150Smm 122169689Skan#ifndef MADV_ACCESS_LWP 123169689Skan# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 124169689Skan#endif 125169689Skan#ifndef MADV_ACCESS_MANY 126169689Skan# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 127169689Skan#endif 128169689Skan 129169689Skan#ifndef LGRP_RSRC_CPU 130169689Skan# define LGRP_RSRC_CPU 0 /* CPU resources */ 131169689Skan#endif 132169689Skan#ifndef LGRP_RSRC_MEM 133169689Skan# define LGRP_RSRC_MEM 1 /* memory resources */ 134169689Skan#endif 135169689Skan 136169689Skan// see thr_setprio(3T) for the basis of these numbers 137169689Skan#define MinimumPriority 0 138169689Skan#define NormalPriority 64 139169689Skan#define MaximumPriority 127 140169689Skan 141169689Skan// Values for ThreadPriorityPolicy == 1 142169689Skanint prio_policy1[CriticalPriority+1] = { 143169689Skan -99999, 0, 16, 32, 48, 64, 144169689Skan 80, 96, 112, 124, 127, 127 }; 145169689Skan 146169689Skan// System parameters used internally 147169689Skanstatic clock_t clock_tics_per_sec = 100; 148169689Skan 149169689Skan// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 150169689Skanstatic bool enabled_extended_FILE_stdio = false; 151169689Skan 152169689Skan// For diagnostics to print a message once. see run_periodic_checks 153169689Skanstatic bool check_addr0_done = false; 154169689Skanstatic sigset_t check_signal_done; 155169689Skanstatic bool check_signals = true; 156169689Skan 157169689Skanaddress os::Solaris::handler_start; // start pc of thr_sighndlrinfo 158169689Skanaddress os::Solaris::handler_end; // end pc of thr_sighndlrinfo 159169689Skan 160169689Skanaddress os::Solaris::_main_stack_base = NULL; // 4352906 workaround 161169689Skan 162169689Skan 163169689Skan// "default" initializers for missing libc APIs 164169689Skanextern "C" { 165169689Skan static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 166169689Skan static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 167169689Skan 168169689Skan static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 169169689Skan static int lwp_cond_destroy(cond_t *cv) { return 0; } 170169689Skan} 171169689Skan 172169689Skan// "default" initializers for pthread-based synchronization 173169689Skanextern "C" { 174169689Skan static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 175169689Skan static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 176169689Skan} 177169689Skan 178169689Skanstatic void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 179169689Skan 180169689Skan// Thread Local Storage 181169689Skan// This is common to all Solaris platforms so it is defined here, 182169689Skan// in this common file. 183169689Skan// The declarations are in the os_cpu threadLS*.hpp files. 184169689Skan// 185169689Skan// Static member initialization for TLS 186169689SkanThread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 187169689Skan 188169689Skan#ifndef PRODUCT 189169689Skan#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 190169689Skan 191169689Skanint ThreadLocalStorage::_tcacheHit = 0; 192169689Skanint ThreadLocalStorage::_tcacheMiss = 0; 193169689Skan 194169689Skanvoid ThreadLocalStorage::print_statistics() { 195169689Skan int total = _tcacheMiss+_tcacheHit; 196169689Skan tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 197169689Skan _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 198169689Skan} 199169689Skan#undef _PCT 200169689Skan#endif // PRODUCT 201169689Skan 202169689SkanThread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 203169689Skan int index) { 204169689Skan Thread *thread = get_thread_slow(); 205169689Skan if (thread != NULL) { 206169689Skan address sp = os::current_stack_pointer(); 207169689Skan guarantee(thread->_stack_base == NULL || 208169689Skan (sp <= thread->_stack_base && 209169689Skan sp >= thread->_stack_base - thread->_stack_size) || 210169689Skan is_error_reported(), 211169689Skan "sp must be inside of selected thread stack"); 212169689Skan 213169689Skan thread->set_self_raw_id(raw_id); // mark for quick retrieval 214169689Skan _get_thread_cache[ index ] = thread; 215169689Skan } 216169689Skan return thread; 217169689Skan} 218169689Skan 219169689Skan 220169689Skanstatic const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 221169689Skan#define NO_CACHED_THREAD ((Thread*)all_zero) 222169689Skan 223169689Skanvoid ThreadLocalStorage::pd_set_thread(Thread* thread) { 224169689Skan 225169689Skan // Store the new value before updating the cache to prevent a race 226169689Skan // between get_thread_via_cache_slowly() and this store operation. 227169689Skan os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 228169689Skan 229169689Skan // Update thread cache with new thread if setting on thread create, 230169689Skan // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 231169689Skan uintptr_t raw = pd_raw_thread_id(); 232169689Skan int ix = pd_cache_index(raw); 233169689Skan _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 234169689Skan} 235169689Skan 236169689Skanvoid ThreadLocalStorage::pd_init() { 237169689Skan for (int i = 0; i < _pd_cache_size; i++) { 238169689Skan _get_thread_cache[i] = NO_CACHED_THREAD; 239169689Skan } 240169689Skan} 241169689Skan 242169689Skan// Invalidate all the caches (happens to be the same as pd_init). 243169689Skanvoid ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 244169689Skan 245169689Skan#undef NO_CACHED_THREAD 246169689Skan 247169689Skan// END Thread Local Storage 248169689Skan 249169689Skanstatic inline size_t adjust_stack_size(address base, size_t size) { 250169689Skan if ((ssize_t)size < 0) { 251169689Skan // 4759953: Compensate for ridiculous stack size. 252169689Skan size = max_intx; 253169689Skan } 254169689Skan if (size > (size_t)base) { 255169689Skan // 4812466: Make sure size doesn't allow the stack to wrap the address space. 256169689Skan size = (size_t)base; 257169689Skan } 258169689Skan return size; 259169689Skan} 260169689Skan 261169689Skanstatic inline stack_t get_stack_info() { 262169689Skan stack_t st; 263169689Skan int retval = thr_stksegment(&st); 264169689Skan st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 265169689Skan assert(retval == 0, "incorrect return value from thr_stksegment"); 266169689Skan assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 267169689Skan assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 268169689Skan return st; 269169689Skan} 270169689Skan 271169689Skanaddress os::current_stack_base() { 272169689Skan int r = thr_main() ; 273169689Skan guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 274169689Skan bool is_primordial_thread = r; 275169689Skan 276169689Skan // Workaround 4352906, avoid calls to thr_stksegment by 277169689Skan // thr_main after the first one (it looks like we trash 278169689Skan // some data, causing the value for ss_sp to be incorrect). 279169689Skan if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 280169689Skan stack_t st = get_stack_info(); 281169689Skan if (is_primordial_thread) { 282169689Skan // cache initial value of stack base 283169689Skan os::Solaris::_main_stack_base = (address)st.ss_sp; 284169689Skan } 285169689Skan return (address)st.ss_sp; 286169689Skan } else { 287169689Skan guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 288169689Skan return os::Solaris::_main_stack_base; 289 } 290} 291 292size_t os::current_stack_size() { 293 size_t size; 294 295 int r = thr_main() ; 296 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 297 if(!r) { 298 size = get_stack_info().ss_size; 299 } else { 300 struct rlimit limits; 301 getrlimit(RLIMIT_STACK, &limits); 302 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 303 } 304 // base may not be page aligned 305 address base = current_stack_base(); 306 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 307 return (size_t)(base - bottom); 308} 309 310struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 311 return localtime_r(clock, res); 312} 313 314// interruptible infrastructure 315 316// setup_interruptible saves the thread state before going into an 317// interruptible system call. 318// The saved state is used to restore the thread to 319// its former state whether or not an interrupt is received. 320// Used by classloader os::read 321// os::restartable_read calls skip this layer and stay in _thread_in_native 322 323void os::Solaris::setup_interruptible(JavaThread* thread) { 324 325 JavaThreadState thread_state = thread->thread_state(); 326 327 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 328 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 329 OSThread* osthread = thread->osthread(); 330 osthread->set_saved_interrupt_thread_state(thread_state); 331 thread->frame_anchor()->make_walkable(thread); 332 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 333} 334 335// Version of setup_interruptible() for threads that are already in 336// _thread_blocked. Used by os_sleep(). 337void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 338 thread->frame_anchor()->make_walkable(thread); 339} 340 341JavaThread* os::Solaris::setup_interruptible() { 342 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 343 setup_interruptible(thread); 344 return thread; 345} 346 347void os::Solaris::try_enable_extended_io() { 348 typedef int (*enable_extended_FILE_stdio_t)(int, int); 349 350 if (!UseExtendedFileIO) { 351 return; 352 } 353 354 enable_extended_FILE_stdio_t enabler = 355 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 356 "enable_extended_FILE_stdio"); 357 if (enabler) { 358 enabler(-1, -1); 359 } 360} 361 362 363#ifdef ASSERT 364 365JavaThread* os::Solaris::setup_interruptible_native() { 366 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 367 JavaThreadState thread_state = thread->thread_state(); 368 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 369 return thread; 370} 371 372void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 373 JavaThreadState thread_state = thread->thread_state(); 374 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 375} 376#endif 377 378// cleanup_interruptible reverses the effects of setup_interruptible 379// setup_interruptible_already_blocked() does not need any cleanup. 380 381void os::Solaris::cleanup_interruptible(JavaThread* thread) { 382 OSThread* osthread = thread->osthread(); 383 384 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 385} 386 387// I/O interruption related counters called in _INTERRUPTIBLE 388 389void os::Solaris::bump_interrupted_before_count() { 390 RuntimeService::record_interrupted_before_count(); 391} 392 393void os::Solaris::bump_interrupted_during_count() { 394 RuntimeService::record_interrupted_during_count(); 395} 396 397static int _processors_online = 0; 398 399 jint os::Solaris::_os_thread_limit = 0; 400volatile jint os::Solaris::_os_thread_count = 0; 401 402julong os::available_memory() { 403 return Solaris::available_memory(); 404} 405 406julong os::Solaris::available_memory() { 407 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 408} 409 410julong os::Solaris::_physical_memory = 0; 411 412julong os::physical_memory() { 413 return Solaris::physical_memory(); 414} 415 416static hrtime_t first_hrtime = 0; 417static const hrtime_t hrtime_hz = 1000*1000*1000; 418const int LOCK_BUSY = 1; 419const int LOCK_FREE = 0; 420const int LOCK_INVALID = -1; 421static volatile hrtime_t max_hrtime = 0; 422static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 423 424 425void os::Solaris::initialize_system_info() { 426 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 427 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 428 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 429} 430 431int os::active_processor_count() { 432 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 433 pid_t pid = getpid(); 434 psetid_t pset = PS_NONE; 435 // Are we running in a processor set or is there any processor set around? 436 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 437 uint_t pset_cpus; 438 // Query the number of cpus available to us. 439 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 440 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 441 _processors_online = pset_cpus; 442 return pset_cpus; 443 } 444 } 445 // Otherwise return number of online cpus 446 return online_cpus; 447} 448 449static bool find_processors_in_pset(psetid_t pset, 450 processorid_t** id_array, 451 uint_t* id_length) { 452 bool result = false; 453 // Find the number of processors in the processor set. 454 if (pset_info(pset, NULL, id_length, NULL) == 0) { 455 // Make up an array to hold their ids. 456 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 457 // Fill in the array with their processor ids. 458 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 459 result = true; 460 } 461 } 462 return result; 463} 464 465// Callers of find_processors_online() must tolerate imprecise results -- 466// the system configuration can change asynchronously because of DR 467// or explicit psradm operations. 468// 469// We also need to take care that the loop (below) terminates as the 470// number of processors online can change between the _SC_NPROCESSORS_ONLN 471// request and the loop that builds the list of processor ids. Unfortunately 472// there's no reliable way to determine the maximum valid processor id, 473// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 474// man pages, which claim the processor id set is "sparse, but 475// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 476// exit the loop. 477// 478// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 479// not available on S8.0. 480 481static bool find_processors_online(processorid_t** id_array, 482 uint* id_length) { 483 const processorid_t MAX_PROCESSOR_ID = 100000 ; 484 // Find the number of processors online. 485 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 486 // Make up an array to hold their ids. 487 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 488 // Processors need not be numbered consecutively. 489 long found = 0; 490 processorid_t next = 0; 491 while (found < *id_length && next < MAX_PROCESSOR_ID) { 492 processor_info_t info; 493 if (processor_info(next, &info) == 0) { 494 // NB, PI_NOINTR processors are effectively online ... 495 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 496 (*id_array)[found] = next; 497 found += 1; 498 } 499 } 500 next += 1; 501 } 502 if (found < *id_length) { 503 // The loop above didn't identify the expected number of processors. 504 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 505 // and re-running the loop, above, but there's no guarantee of progress 506 // if the system configuration is in flux. Instead, we just return what 507 // we've got. Note that in the worst case find_processors_online() could 508 // return an empty set. (As a fall-back in the case of the empty set we 509 // could just return the ID of the current processor). 510 *id_length = found ; 511 } 512 513 return true; 514} 515 516static bool assign_distribution(processorid_t* id_array, 517 uint id_length, 518 uint* distribution, 519 uint distribution_length) { 520 // We assume we can assign processorid_t's to uint's. 521 assert(sizeof(processorid_t) == sizeof(uint), 522 "can't convert processorid_t to uint"); 523 // Quick check to see if we won't succeed. 524 if (id_length < distribution_length) { 525 return false; 526 } 527 // Assign processor ids to the distribution. 528 // Try to shuffle processors to distribute work across boards, 529 // assuming 4 processors per board. 530 const uint processors_per_board = ProcessDistributionStride; 531 // Find the maximum processor id. 532 processorid_t max_id = 0; 533 for (uint m = 0; m < id_length; m += 1) { 534 max_id = MAX2(max_id, id_array[m]); 535 } 536 // The next id, to limit loops. 537 const processorid_t limit_id = max_id + 1; 538 // Make up markers for available processors. 539 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 540 for (uint c = 0; c < limit_id; c += 1) { 541 available_id[c] = false; 542 } 543 for (uint a = 0; a < id_length; a += 1) { 544 available_id[id_array[a]] = true; 545 } 546 // Step by "boards", then by "slot", copying to "assigned". 547 // NEEDS_CLEANUP: The assignment of processors should be stateful, 548 // remembering which processors have been assigned by 549 // previous calls, etc., so as to distribute several 550 // independent calls of this method. What we'd like is 551 // It would be nice to have an API that let us ask 552 // how many processes are bound to a processor, 553 // but we don't have that, either. 554 // In the short term, "board" is static so that 555 // subsequent distributions don't all start at board 0. 556 static uint board = 0; 557 uint assigned = 0; 558 // Until we've found enough processors .... 559 while (assigned < distribution_length) { 560 // ... find the next available processor in the board. 561 for (uint slot = 0; slot < processors_per_board; slot += 1) { 562 uint try_id = board * processors_per_board + slot; 563 if ((try_id < limit_id) && (available_id[try_id] == true)) { 564 distribution[assigned] = try_id; 565 available_id[try_id] = false; 566 assigned += 1; 567 break; 568 } 569 } 570 board += 1; 571 if (board * processors_per_board + 0 >= limit_id) { 572 board = 0; 573 } 574 } 575 if (available_id != NULL) { 576 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 577 } 578 return true; 579} 580 581void os::set_native_thread_name(const char *name) { 582 // Not yet implemented. 583 return; 584} 585 586bool os::distribute_processes(uint length, uint* distribution) { 587 bool result = false; 588 // Find the processor id's of all the available CPUs. 589 processorid_t* id_array = NULL; 590 uint id_length = 0; 591 // There are some races between querying information and using it, 592 // since processor sets can change dynamically. 593 psetid_t pset = PS_NONE; 594 // Are we running in a processor set? 595 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 596 result = find_processors_in_pset(pset, &id_array, &id_length); 597 } else { 598 result = find_processors_online(&id_array, &id_length); 599 } 600 if (result == true) { 601 if (id_length >= length) { 602 result = assign_distribution(id_array, id_length, distribution, length); 603 } else { 604 result = false; 605 } 606 } 607 if (id_array != NULL) { 608 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 609 } 610 return result; 611} 612 613bool os::bind_to_processor(uint processor_id) { 614 // We assume that a processorid_t can be stored in a uint. 615 assert(sizeof(uint) == sizeof(processorid_t), 616 "can't convert uint to processorid_t"); 617 int bind_result = 618 processor_bind(P_LWPID, // bind LWP. 619 P_MYID, // bind current LWP. 620 (processorid_t) processor_id, // id. 621 NULL); // don't return old binding. 622 return (bind_result == 0); 623} 624 625bool os::getenv(const char* name, char* buffer, int len) { 626 char* val = ::getenv( name ); 627 if ( val == NULL 628 || strlen(val) + 1 > len ) { 629 if (len > 0) buffer[0] = 0; // return a null string 630 return false; 631 } 632 strcpy( buffer, val ); 633 return true; 634} 635 636 637// Return true if user is running as root. 638 639bool os::have_special_privileges() { 640 static bool init = false; 641 static bool privileges = false; 642 if (!init) { 643 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 644 init = true; 645 } 646 return privileges; 647} 648 649 650void os::init_system_properties_values() { 651 char arch[12]; 652 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 653 654 // The next steps are taken in the product version: 655 // 656 // Obtain the JAVA_HOME value from the location of libjvm.so. 657 // This library should be located at: 658 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 659 // 660 // If "/jre/lib/" appears at the right place in the path, then we 661 // assume libjvm.so is installed in a JDK and we use this path. 662 // 663 // Otherwise exit with message: "Could not create the Java virtual machine." 664 // 665 // The following extra steps are taken in the debugging version: 666 // 667 // If "/jre/lib/" does NOT appear at the right place in the path 668 // instead of exit check for $JAVA_HOME environment variable. 669 // 670 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 671 // then we append a fake suffix "hotspot/libjvm.so" to this path so 672 // it looks like libjvm.so is installed there 673 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 674 // 675 // Otherwise exit. 676 // 677 // Important note: if the location of libjvm.so changes this 678 // code needs to be changed accordingly. 679 680 // The next few definitions allow the code to be verbatim: 681#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) 682#define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal) 683#define getenv(n) ::getenv(n) 684 685#define EXTENSIONS_DIR "/lib/ext" 686#define ENDORSED_DIR "/lib/endorsed" 687#define COMMON_DIR "/usr/jdk/packages" 688 689 { 690 /* sysclasspath, java_home, dll_dir */ 691 { 692 char *home_path; 693 char *dll_path; 694 char *pslash; 695 char buf[MAXPATHLEN]; 696 os::jvm_path(buf, sizeof(buf)); 697 698 // Found the full path to libjvm.so. 699 // Now cut the path to <java_home>/jre if we can. 700 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 701 pslash = strrchr(buf, '/'); 702 if (pslash != NULL) 703 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 704 dll_path = malloc(strlen(buf) + 1); 705 if (dll_path == NULL) 706 return; 707 strcpy(dll_path, buf); 708 Arguments::set_dll_dir(dll_path); 709 710 if (pslash != NULL) { 711 pslash = strrchr(buf, '/'); 712 if (pslash != NULL) { 713 *pslash = '\0'; /* get rid of /<arch> */ 714 pslash = strrchr(buf, '/'); 715 if (pslash != NULL) 716 *pslash = '\0'; /* get rid of /lib */ 717 } 718 } 719 720 home_path = malloc(strlen(buf) + 1); 721 if (home_path == NULL) 722 return; 723 strcpy(home_path, buf); 724 Arguments::set_java_home(home_path); 725 726 if (!set_boot_path('/', ':')) 727 return; 728 } 729 730 /* 731 * Where to look for native libraries 732 */ 733 { 734 // Use dlinfo() to determine the correct java.library.path. 735 // 736 // If we're launched by the Java launcher, and the user 737 // does not set java.library.path explicitly on the commandline, 738 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 739 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 740 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 741 // /usr/lib), which is exactly what we want. 742 // 743 // If the user does set java.library.path, it completely 744 // overwrites this setting, and always has. 745 // 746 // If we're not launched by the Java launcher, we may 747 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 748 // settings. Again, dlinfo does exactly what we want. 749 750 Dl_serinfo _info, *info = &_info; 751 Dl_serpath *path; 752 char* library_path; 753 char *common_path; 754 int i; 755 756 // determine search path count and required buffer size 757 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 758 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 759 } 760 761 // allocate new buffer and initialize 762 info = (Dl_serinfo*)malloc(_info.dls_size); 763 if (info == NULL) { 764 vm_exit_out_of_memory(_info.dls_size, OOM_MALLOC_ERROR, 765 "init_system_properties_values info"); 766 } 767 info->dls_size = _info.dls_size; 768 info->dls_cnt = _info.dls_cnt; 769 770 // obtain search path information 771 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 772 free(info); 773 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 774 } 775 776 path = &info->dls_serpath[0]; 777 778 // Note: Due to a legacy implementation, most of the library path 779 // is set in the launcher. This was to accomodate linking restrictions 780 // on legacy Solaris implementations (which are no longer supported). 781 // Eventually, all the library path setting will be done here. 782 // 783 // However, to prevent the proliferation of improperly built native 784 // libraries, the new path component /usr/jdk/packages is added here. 785 786 // Determine the actual CPU architecture. 787 char cpu_arch[12]; 788 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 789#ifdef _LP64 790 // If we are a 64-bit vm, perform the following translations: 791 // sparc -> sparcv9 792 // i386 -> amd64 793 if (strcmp(cpu_arch, "sparc") == 0) 794 strcat(cpu_arch, "v9"); 795 else if (strcmp(cpu_arch, "i386") == 0) 796 strcpy(cpu_arch, "amd64"); 797#endif 798 799 // Construct the invariant part of ld_library_path. Note that the 800 // space for the colon and the trailing null are provided by the 801 // nulls included by the sizeof operator. 802 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 803 common_path = malloc(bufsize); 804 if (common_path == NULL) { 805 free(info); 806 vm_exit_out_of_memory(bufsize, OOM_MALLOC_ERROR, 807 "init_system_properties_values common_path"); 808 } 809 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 810 811 // struct size is more than sufficient for the path components obtained 812 // through the dlinfo() call, so only add additional space for the path 813 // components explicitly added here. 814 bufsize = info->dls_size + strlen(common_path); 815 library_path = malloc(bufsize); 816 if (library_path == NULL) { 817 free(info); 818 free(common_path); 819 vm_exit_out_of_memory(bufsize, OOM_MALLOC_ERROR, 820 "init_system_properties_values library_path"); 821 } 822 library_path[0] = '\0'; 823 824 // Construct the desired Java library path from the linker's library 825 // search path. 826 // 827 // For compatibility, it is optimal that we insert the additional path 828 // components specific to the Java VM after those components specified 829 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 830 // infrastructure. 831 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 832 strcpy(library_path, common_path); 833 } else { 834 int inserted = 0; 835 for (i = 0; i < info->dls_cnt; i++, path++) { 836 uint_t flags = path->dls_flags & LA_SER_MASK; 837 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 838 strcat(library_path, common_path); 839 strcat(library_path, os::path_separator()); 840 inserted = 1; 841 } 842 strcat(library_path, path->dls_name); 843 strcat(library_path, os::path_separator()); 844 } 845 // eliminate trailing path separator 846 library_path[strlen(library_path)-1] = '\0'; 847 } 848 849 // happens before argument parsing - can't use a trace flag 850 // tty->print_raw("init_system_properties_values: native lib path: "); 851 // tty->print_raw_cr(library_path); 852 853 // callee copies into its own buffer 854 Arguments::set_library_path(library_path); 855 856 free(common_path); 857 free(library_path); 858 free(info); 859 } 860 861 /* 862 * Extensions directories. 863 * 864 * Note that the space for the colon and the trailing null are provided 865 * by the nulls included by the sizeof operator (so actually one byte more 866 * than necessary is allocated). 867 */ 868 { 869 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 870 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 871 sizeof(EXTENSIONS_DIR)); 872 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 873 Arguments::get_java_home()); 874 Arguments::set_ext_dirs(buf); 875 } 876 877 /* Endorsed standards default directory. */ 878 { 879 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 880 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 881 Arguments::set_endorsed_dirs(buf); 882 } 883 } 884 885#undef malloc 886#undef free 887#undef getenv 888#undef EXTENSIONS_DIR 889#undef ENDORSED_DIR 890#undef COMMON_DIR 891 892} 893 894void os::breakpoint() { 895 BREAKPOINT; 896} 897 898bool os::obsolete_option(const JavaVMOption *option) 899{ 900 if (!strncmp(option->optionString, "-Xt", 3)) { 901 return true; 902 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 903 return true; 904 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 905 return true; 906 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 907 return true; 908 } 909 return false; 910} 911 912bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 913 address stackStart = (address)thread->stack_base(); 914 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 915 if (sp < stackStart && sp >= stackEnd ) return true; 916 return false; 917} 918 919extern "C" void breakpoint() { 920 // use debugger to set breakpoint here 921} 922 923static thread_t main_thread; 924 925// Thread start routine for all new Java threads 926extern "C" void* java_start(void* thread_addr) { 927 // Try to randomize the cache line index of hot stack frames. 928 // This helps when threads of the same stack traces evict each other's 929 // cache lines. The threads can be either from the same JVM instance, or 930 // from different JVM instances. The benefit is especially true for 931 // processors with hyperthreading technology. 932 static int counter = 0; 933 int pid = os::current_process_id(); 934 alloca(((pid ^ counter++) & 7) * 128); 935 936 int prio; 937 Thread* thread = (Thread*)thread_addr; 938 OSThread* osthr = thread->osthread(); 939 940 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 941 thread->_schedctl = (void *) schedctl_init () ; 942 943 if (UseNUMA) { 944 int lgrp_id = os::numa_get_group_id(); 945 if (lgrp_id != -1) { 946 thread->set_lgrp_id(lgrp_id); 947 } 948 } 949 950 // If the creator called set priority before we started, 951 // we need to call set_native_priority now that we have an lwp. 952 // We used to get the priority from thr_getprio (we called 953 // thr_setprio way back in create_thread) and pass it to 954 // set_native_priority, but Solaris scales the priority 955 // in java_to_os_priority, so when we read it back here, 956 // we pass trash to set_native_priority instead of what's 957 // in java_to_os_priority. So we save the native priority 958 // in the osThread and recall it here. 959 960 if ( osthr->thread_id() != -1 ) { 961 if ( UseThreadPriorities ) { 962 int prio = osthr->native_priority(); 963 if (ThreadPriorityVerbose) { 964 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 965 INTPTR_FORMAT ", setting priority: %d\n", 966 osthr->thread_id(), osthr->lwp_id(), prio); 967 } 968 os::set_native_priority(thread, prio); 969 } 970 } else if (ThreadPriorityVerbose) { 971 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 972 } 973 974 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 975 976 // initialize signal mask for this thread 977 os::Solaris::hotspot_sigmask(thread); 978 979 thread->run(); 980 981 // One less thread is executing 982 // When the VMThread gets here, the main thread may have already exited 983 // which frees the CodeHeap containing the Atomic::dec code 984 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 985 Atomic::dec(&os::Solaris::_os_thread_count); 986 } 987 988 if (UseDetachedThreads) { 989 thr_exit(NULL); 990 ShouldNotReachHere(); 991 } 992 return NULL; 993} 994 995static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 996 // Allocate the OSThread object 997 OSThread* osthread = new OSThread(NULL, NULL); 998 if (osthread == NULL) return NULL; 999 1000 // Store info on the Solaris thread into the OSThread 1001 osthread->set_thread_id(thread_id); 1002 osthread->set_lwp_id(_lwp_self()); 1003 thread->_schedctl = (void *) schedctl_init () ; 1004 1005 if (UseNUMA) { 1006 int lgrp_id = os::numa_get_group_id(); 1007 if (lgrp_id != -1) { 1008 thread->set_lgrp_id(lgrp_id); 1009 } 1010 } 1011 1012 if ( ThreadPriorityVerbose ) { 1013 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1014 osthread->thread_id(), osthread->lwp_id() ); 1015 } 1016 1017 // Initial thread state is INITIALIZED, not SUSPENDED 1018 osthread->set_state(INITIALIZED); 1019 1020 return osthread; 1021} 1022 1023void os::Solaris::hotspot_sigmask(Thread* thread) { 1024 1025 //Save caller's signal mask 1026 sigset_t sigmask; 1027 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1028 OSThread *osthread = thread->osthread(); 1029 osthread->set_caller_sigmask(sigmask); 1030 1031 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1032 if (!ReduceSignalUsage) { 1033 if (thread->is_VM_thread()) { 1034 // Only the VM thread handles BREAK_SIGNAL ... 1035 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1036 } else { 1037 // ... all other threads block BREAK_SIGNAL 1038 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1039 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1040 } 1041 } 1042} 1043 1044bool os::create_attached_thread(JavaThread* thread) { 1045#ifdef ASSERT 1046 thread->verify_not_published(); 1047#endif 1048 OSThread* osthread = create_os_thread(thread, thr_self()); 1049 if (osthread == NULL) { 1050 return false; 1051 } 1052 1053 // Initial thread state is RUNNABLE 1054 osthread->set_state(RUNNABLE); 1055 thread->set_osthread(osthread); 1056 1057 // initialize signal mask for this thread 1058 // and save the caller's signal mask 1059 os::Solaris::hotspot_sigmask(thread); 1060 1061 return true; 1062} 1063 1064bool os::create_main_thread(JavaThread* thread) { 1065#ifdef ASSERT 1066 thread->verify_not_published(); 1067#endif 1068 if (_starting_thread == NULL) { 1069 _starting_thread = create_os_thread(thread, main_thread); 1070 if (_starting_thread == NULL) { 1071 return false; 1072 } 1073 } 1074 1075 // The primodial thread is runnable from the start 1076 _starting_thread->set_state(RUNNABLE); 1077 1078 thread->set_osthread(_starting_thread); 1079 1080 // initialize signal mask for this thread 1081 // and save the caller's signal mask 1082 os::Solaris::hotspot_sigmask(thread); 1083 1084 return true; 1085} 1086 1087// _T2_libthread is true if we believe we are running with the newer 1088// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1089bool os::Solaris::_T2_libthread = false; 1090 1091bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1092 // Allocate the OSThread object 1093 OSThread* osthread = new OSThread(NULL, NULL); 1094 if (osthread == NULL) { 1095 return false; 1096 } 1097 1098 if ( ThreadPriorityVerbose ) { 1099 char *thrtyp; 1100 switch ( thr_type ) { 1101 case vm_thread: 1102 thrtyp = (char *)"vm"; 1103 break; 1104 case cgc_thread: 1105 thrtyp = (char *)"cgc"; 1106 break; 1107 case pgc_thread: 1108 thrtyp = (char *)"pgc"; 1109 break; 1110 case java_thread: 1111 thrtyp = (char *)"java"; 1112 break; 1113 case compiler_thread: 1114 thrtyp = (char *)"compiler"; 1115 break; 1116 case watcher_thread: 1117 thrtyp = (char *)"watcher"; 1118 break; 1119 default: 1120 thrtyp = (char *)"unknown"; 1121 break; 1122 } 1123 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1124 } 1125 1126 // Calculate stack size if it's not specified by caller. 1127 if (stack_size == 0) { 1128 // The default stack size 1M (2M for LP64). 1129 stack_size = (BytesPerWord >> 2) * K * K; 1130 1131 switch (thr_type) { 1132 case os::java_thread: 1133 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1134 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1135 break; 1136 case os::compiler_thread: 1137 if (CompilerThreadStackSize > 0) { 1138 stack_size = (size_t)(CompilerThreadStackSize * K); 1139 break; 1140 } // else fall through: 1141 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1142 case os::vm_thread: 1143 case os::pgc_thread: 1144 case os::cgc_thread: 1145 case os::watcher_thread: 1146 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1147 break; 1148 } 1149 } 1150 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1151 1152 // Initial state is ALLOCATED but not INITIALIZED 1153 osthread->set_state(ALLOCATED); 1154 1155 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1156 // We got lots of threads. Check if we still have some address space left. 1157 // Need to be at least 5Mb of unreserved address space. We do check by 1158 // trying to reserve some. 1159 const size_t VirtualMemoryBangSize = 20*K*K; 1160 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1161 if (mem == NULL) { 1162 delete osthread; 1163 return false; 1164 } else { 1165 // Release the memory again 1166 os::release_memory(mem, VirtualMemoryBangSize); 1167 } 1168 } 1169 1170 // Setup osthread because the child thread may need it. 1171 thread->set_osthread(osthread); 1172 1173 // Create the Solaris thread 1174 // explicit THR_BOUND for T2_libthread case in case 1175 // that assumption is not accurate, but our alternate signal stack 1176 // handling is based on it which must have bound threads 1177 thread_t tid = 0; 1178 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1179 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1180 (thr_type == vm_thread) || 1181 (thr_type == cgc_thread) || 1182 (thr_type == pgc_thread) || 1183 (thr_type == compiler_thread && BackgroundCompilation)) ? 1184 THR_BOUND : 0); 1185 int status; 1186 1187 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1188 // 1189 // On multiprocessors systems, libthread sometimes under-provisions our 1190 // process with LWPs. On a 30-way systems, for instance, we could have 1191 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1192 // to our process. This can result in under utilization of PEs. 1193 // I suspect the problem is related to libthread's LWP 1194 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1195 // upcall policy. 1196 // 1197 // The following code is palliative -- it attempts to ensure that our 1198 // process has sufficient LWPs to take advantage of multiple PEs. 1199 // Proper long-term cures include using user-level threads bound to LWPs 1200 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1201 // slight timing window with respect to sampling _os_thread_count, but 1202 // the race is benign. Also, we should periodically recompute 1203 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1204 // the number of PEs in our partition. You might be tempted to use 1205 // THR_NEW_LWP here, but I'd recommend against it as that could 1206 // result in undesirable growth of the libthread's LWP pool. 1207 // The fix below isn't sufficient; for instance, it doesn't take into count 1208 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1209 // 1210 // Some pathologies this scheme doesn't handle: 1211 // * Threads can block, releasing the LWPs. The LWPs can age out. 1212 // When a large number of threads become ready again there aren't 1213 // enough LWPs available to service them. This can occur when the 1214 // number of ready threads oscillates. 1215 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1216 // 1217 // Finally, we should call thr_setconcurrency() periodically to refresh 1218 // the LWP pool and thwart the LWP age-out mechanism. 1219 // The "+3" term provides a little slop -- we want to slightly overprovision. 1220 1221 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1222 if (!(flags & THR_BOUND)) { 1223 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1224 } 1225 } 1226 // Although this doesn't hurt, we should warn of undefined behavior 1227 // when using unbound T1 threads with schedctl(). This should never 1228 // happen, as the compiler and VM threads are always created bound 1229 DEBUG_ONLY( 1230 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1231 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1232 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1233 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1234 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1235 } 1236 ); 1237 1238 1239 // Mark that we don't have an lwp or thread id yet. 1240 // In case we attempt to set the priority before the thread starts. 1241 osthread->set_lwp_id(-1); 1242 osthread->set_thread_id(-1); 1243 1244 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1245 if (status != 0) { 1246 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1247 perror("os::create_thread"); 1248 } 1249 thread->set_osthread(NULL); 1250 // Need to clean up stuff we've allocated so far 1251 delete osthread; 1252 return false; 1253 } 1254 1255 Atomic::inc(&os::Solaris::_os_thread_count); 1256 1257 // Store info on the Solaris thread into the OSThread 1258 osthread->set_thread_id(tid); 1259 1260 // Remember that we created this thread so we can set priority on it 1261 osthread->set_vm_created(); 1262 1263 // Set the default thread priority. If using bound threads, setting 1264 // lwp priority will be delayed until thread start. 1265 set_native_priority(thread, 1266 DefaultThreadPriority == -1 ? 1267 java_to_os_priority[NormPriority] : 1268 DefaultThreadPriority); 1269 1270 // Initial thread state is INITIALIZED, not SUSPENDED 1271 osthread->set_state(INITIALIZED); 1272 1273 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1274 return true; 1275} 1276 1277/* defined for >= Solaris 10. This allows builds on earlier versions 1278 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1279 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1280 * and -XX:+UseAltSigs does nothing since these should have no conflict 1281 */ 1282#if !defined(SIGJVM1) 1283#define SIGJVM1 39 1284#define SIGJVM2 40 1285#endif 1286 1287debug_only(static bool signal_sets_initialized = false); 1288static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1289int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1290int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1291 1292bool os::Solaris::is_sig_ignored(int sig) { 1293 struct sigaction oact; 1294 sigaction(sig, (struct sigaction*)NULL, &oact); 1295 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1296 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1297 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1298 return true; 1299 else 1300 return false; 1301} 1302 1303// Note: SIGRTMIN is a macro that calls sysconf() so it will 1304// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1305static bool isJVM1available() { 1306 return SIGJVM1 < SIGRTMIN; 1307} 1308 1309void os::Solaris::signal_sets_init() { 1310 // Should also have an assertion stating we are still single-threaded. 1311 assert(!signal_sets_initialized, "Already initialized"); 1312 // Fill in signals that are necessarily unblocked for all threads in 1313 // the VM. Currently, we unblock the following signals: 1314 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1315 // by -Xrs (=ReduceSignalUsage)); 1316 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1317 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1318 // the dispositions or masks wrt these signals. 1319 // Programs embedding the VM that want to use the above signals for their 1320 // own purposes must, at this time, use the "-Xrs" option to prevent 1321 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1322 // (See bug 4345157, and other related bugs). 1323 // In reality, though, unblocking these signals is really a nop, since 1324 // these signals are not blocked by default. 1325 sigemptyset(&unblocked_sigs); 1326 sigemptyset(&allowdebug_blocked_sigs); 1327 sigaddset(&unblocked_sigs, SIGILL); 1328 sigaddset(&unblocked_sigs, SIGSEGV); 1329 sigaddset(&unblocked_sigs, SIGBUS); 1330 sigaddset(&unblocked_sigs, SIGFPE); 1331 1332 if (isJVM1available) { 1333 os::Solaris::set_SIGinterrupt(SIGJVM1); 1334 os::Solaris::set_SIGasync(SIGJVM2); 1335 } else if (UseAltSigs) { 1336 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1337 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1338 } else { 1339 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1340 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1341 } 1342 1343 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1344 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1345 1346 if (!ReduceSignalUsage) { 1347 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1348 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1349 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1350 } 1351 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1352 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1353 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1354 } 1355 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1356 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1357 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1358 } 1359 } 1360 // Fill in signals that are blocked by all but the VM thread. 1361 sigemptyset(&vm_sigs); 1362 if (!ReduceSignalUsage) 1363 sigaddset(&vm_sigs, BREAK_SIGNAL); 1364 debug_only(signal_sets_initialized = true); 1365 1366 // For diagnostics only used in run_periodic_checks 1367 sigemptyset(&check_signal_done); 1368} 1369 1370// These are signals that are unblocked while a thread is running Java. 1371// (For some reason, they get blocked by default.) 1372sigset_t* os::Solaris::unblocked_signals() { 1373 assert(signal_sets_initialized, "Not initialized"); 1374 return &unblocked_sigs; 1375} 1376 1377// These are the signals that are blocked while a (non-VM) thread is 1378// running Java. Only the VM thread handles these signals. 1379sigset_t* os::Solaris::vm_signals() { 1380 assert(signal_sets_initialized, "Not initialized"); 1381 return &vm_sigs; 1382} 1383 1384// These are signals that are blocked during cond_wait to allow debugger in 1385sigset_t* os::Solaris::allowdebug_blocked_signals() { 1386 assert(signal_sets_initialized, "Not initialized"); 1387 return &allowdebug_blocked_sigs; 1388} 1389 1390 1391void _handle_uncaught_cxx_exception() { 1392 VMError err("An uncaught C++ exception"); 1393 err.report_and_die(); 1394} 1395 1396 1397// First crack at OS-specific initialization, from inside the new thread. 1398void os::initialize_thread(Thread* thr) { 1399 int r = thr_main() ; 1400 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1401 if (r) { 1402 JavaThread* jt = (JavaThread *)thr; 1403 assert(jt != NULL,"Sanity check"); 1404 size_t stack_size; 1405 address base = jt->stack_base(); 1406 if (Arguments::created_by_java_launcher()) { 1407 // Use 2MB to allow for Solaris 7 64 bit mode. 1408 stack_size = JavaThread::stack_size_at_create() == 0 1409 ? 2048*K : JavaThread::stack_size_at_create(); 1410 1411 // There are rare cases when we may have already used more than 1412 // the basic stack size allotment before this method is invoked. 1413 // Attempt to allow for a normally sized java_stack. 1414 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1415 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1416 } else { 1417 // 6269555: If we were not created by a Java launcher, i.e. if we are 1418 // running embedded in a native application, treat the primordial thread 1419 // as much like a native attached thread as possible. This means using 1420 // the current stack size from thr_stksegment(), unless it is too large 1421 // to reliably setup guard pages. A reasonable max size is 8MB. 1422 size_t current_size = current_stack_size(); 1423 // This should never happen, but just in case.... 1424 if (current_size == 0) current_size = 2 * K * K; 1425 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1426 } 1427 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1428 stack_size = (size_t)(base - bottom); 1429 1430 assert(stack_size > 0, "Stack size calculation problem"); 1431 1432 if (stack_size > jt->stack_size()) { 1433 NOT_PRODUCT( 1434 struct rlimit limits; 1435 getrlimit(RLIMIT_STACK, &limits); 1436 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1437 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1438 ) 1439 tty->print_cr( 1440 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1441 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1442 "See limit(1) to increase the stack size limit.", 1443 stack_size / K, jt->stack_size() / K); 1444 vm_exit(1); 1445 } 1446 assert(jt->stack_size() >= stack_size, 1447 "Attempt to map more stack than was allocated"); 1448 jt->set_stack_size(stack_size); 1449 } 1450 1451 // 5/22/01: Right now alternate signal stacks do not handle 1452 // throwing stack overflow exceptions, see bug 4463178 1453 // Until a fix is found for this, T2 will NOT imply alternate signal 1454 // stacks. 1455 // If using T2 libthread threads, install an alternate signal stack. 1456 // Because alternate stacks associate with LWPs on Solaris, 1457 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1458 // we prefer to explicitly stack bang. 1459 // If not using T2 libthread, but using UseBoundThreads any threads 1460 // (primordial thread, jni_attachCurrentThread) we do not create, 1461 // probably are not bound, therefore they can not have an alternate 1462 // signal stack. Since our stack banging code is generated and 1463 // is shared across threads, all threads must be bound to allow 1464 // using alternate signal stacks. The alternative is to interpose 1465 // on _lwp_create to associate an alt sig stack with each LWP, 1466 // and this could be a problem when the JVM is embedded. 1467 // We would prefer to use alternate signal stacks with T2 1468 // Since there is currently no accurate way to detect T2 1469 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1470 // on installing alternate signal stacks 1471 1472 1473 // 05/09/03: removed alternate signal stack support for Solaris 1474 // The alternate signal stack mechanism is no longer needed to 1475 // handle stack overflow. This is now handled by allocating 1476 // guard pages (red zone) and stackbanging. 1477 // Initially the alternate signal stack mechanism was removed because 1478 // it did not work with T1 llibthread. Alternate 1479 // signal stacks MUST have all threads bound to lwps. Applications 1480 // can create their own threads and attach them without their being 1481 // bound under T1. This is frequently the case for the primordial thread. 1482 // If we were ever to reenable this mechanism we would need to 1483 // use the dynamic check for T2 libthread. 1484 1485 os::Solaris::init_thread_fpu_state(); 1486 std::set_terminate(_handle_uncaught_cxx_exception); 1487} 1488 1489 1490 1491// Free Solaris resources related to the OSThread 1492void os::free_thread(OSThread* osthread) { 1493 assert(osthread != NULL, "os::free_thread but osthread not set"); 1494 1495 1496 // We are told to free resources of the argument thread, 1497 // but we can only really operate on the current thread. 1498 // The main thread must take the VMThread down synchronously 1499 // before the main thread exits and frees up CodeHeap 1500 guarantee((Thread::current()->osthread() == osthread 1501 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1502 if (Thread::current()->osthread() == osthread) { 1503 // Restore caller's signal mask 1504 sigset_t sigmask = osthread->caller_sigmask(); 1505 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1506 } 1507 delete osthread; 1508} 1509 1510void os::pd_start_thread(Thread* thread) { 1511 int status = thr_continue(thread->osthread()->thread_id()); 1512 assert_status(status == 0, status, "thr_continue failed"); 1513} 1514 1515 1516intx os::current_thread_id() { 1517 return (intx)thr_self(); 1518} 1519 1520static pid_t _initial_pid = 0; 1521 1522int os::current_process_id() { 1523 return (int)(_initial_pid ? _initial_pid : getpid()); 1524} 1525 1526int os::allocate_thread_local_storage() { 1527 // %%% in Win32 this allocates a memory segment pointed to by a 1528 // register. Dan Stein can implement a similar feature in 1529 // Solaris. Alternatively, the VM can do the same thing 1530 // explicitly: malloc some storage and keep the pointer in a 1531 // register (which is part of the thread's context) (or keep it 1532 // in TLS). 1533 // %%% In current versions of Solaris, thr_self and TSD can 1534 // be accessed via short sequences of displaced indirections. 1535 // The value of thr_self is available as %g7(36). 1536 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1537 // assuming that the current thread already has a value bound to k. 1538 // It may be worth experimenting with such access patterns, 1539 // and later having the parameters formally exported from a Solaris 1540 // interface. I think, however, that it will be faster to 1541 // maintain the invariant that %g2 always contains the 1542 // JavaThread in Java code, and have stubs simply 1543 // treat %g2 as a caller-save register, preserving it in a %lN. 1544 thread_key_t tk; 1545 if (thr_keycreate( &tk, NULL ) ) 1546 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1547 "(%s)", strerror(errno))); 1548 return int(tk); 1549} 1550 1551void os::free_thread_local_storage(int index) { 1552 // %%% don't think we need anything here 1553 // if ( pthread_key_delete((pthread_key_t) tk) ) 1554 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1555} 1556 1557#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1558 // small number - point is NO swap space available 1559void os::thread_local_storage_at_put(int index, void* value) { 1560 // %%% this is used only in threadLocalStorage.cpp 1561 if (thr_setspecific((thread_key_t)index, value)) { 1562 if (errno == ENOMEM) { 1563 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR, 1564 "thr_setspecific: out of swap space"); 1565 } else { 1566 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1567 "(%s)", strerror(errno))); 1568 } 1569 } else { 1570 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1571 } 1572} 1573 1574// This function could be called before TLS is initialized, for example, when 1575// VM receives an async signal or when VM causes a fatal error during 1576// initialization. Return NULL if thr_getspecific() fails. 1577void* os::thread_local_storage_at(int index) { 1578 // %%% this is used only in threadLocalStorage.cpp 1579 void* r = NULL; 1580 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1581} 1582 1583 1584// gethrtime can move backwards if read from one cpu and then a different cpu 1585// getTimeNanos is guaranteed to not move backward on Solaris 1586// local spinloop created as faster for a CAS on an int than 1587// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1588// supported on sparc v8 or pre supports_cx8 intel boxes. 1589// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1590// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1591inline hrtime_t oldgetTimeNanos() { 1592 int gotlock = LOCK_INVALID; 1593 hrtime_t newtime = gethrtime(); 1594 1595 for (;;) { 1596// grab lock for max_hrtime 1597 int curlock = max_hrtime_lock; 1598 if (curlock & LOCK_BUSY) continue; 1599 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1600 if (newtime > max_hrtime) { 1601 max_hrtime = newtime; 1602 } else { 1603 newtime = max_hrtime; 1604 } 1605 // release lock 1606 max_hrtime_lock = LOCK_FREE; 1607 return newtime; 1608 } 1609} 1610// gethrtime can move backwards if read from one cpu and then a different cpu 1611// getTimeNanos is guaranteed to not move backward on Solaris 1612inline hrtime_t getTimeNanos() { 1613 if (VM_Version::supports_cx8()) { 1614 const hrtime_t now = gethrtime(); 1615 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1616 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1617 if (now <= prev) return prev; // same or retrograde time; 1618 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1619 assert(obsv >= prev, "invariant"); // Monotonicity 1620 // If the CAS succeeded then we're done and return "now". 1621 // If the CAS failed and the observed value "obs" is >= now then 1622 // we should return "obs". If the CAS failed and now > obs > prv then 1623 // some other thread raced this thread and installed a new value, in which case 1624 // we could either (a) retry the entire operation, (b) retry trying to install now 1625 // or (c) just return obs. We use (c). No loop is required although in some cases 1626 // we might discard a higher "now" value in deference to a slightly lower but freshly 1627 // installed obs value. That's entirely benign -- it admits no new orderings compared 1628 // to (a) or (b) -- and greatly reduces coherence traffic. 1629 // We might also condition (c) on the magnitude of the delta between obs and now. 1630 // Avoiding excessive CAS operations to hot RW locations is critical. 1631 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1632 return (prev == obsv) ? now : obsv ; 1633 } else { 1634 return oldgetTimeNanos(); 1635 } 1636} 1637 1638// Time since start-up in seconds to a fine granularity. 1639// Used by VMSelfDestructTimer and the MemProfiler. 1640double os::elapsedTime() { 1641 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1642} 1643 1644jlong os::elapsed_counter() { 1645 return (jlong)(getTimeNanos() - first_hrtime); 1646} 1647 1648jlong os::elapsed_frequency() { 1649 return hrtime_hz; 1650} 1651 1652// Return the real, user, and system times in seconds from an 1653// arbitrary fixed point in the past. 1654bool os::getTimesSecs(double* process_real_time, 1655 double* process_user_time, 1656 double* process_system_time) { 1657 struct tms ticks; 1658 clock_t real_ticks = times(&ticks); 1659 1660 if (real_ticks == (clock_t) (-1)) { 1661 return false; 1662 } else { 1663 double ticks_per_second = (double) clock_tics_per_sec; 1664 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1665 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1666 // For consistency return the real time from getTimeNanos() 1667 // converted to seconds. 1668 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1669 1670 return true; 1671 } 1672} 1673 1674bool os::supports_vtime() { return true; } 1675 1676bool os::enable_vtime() { 1677 int fd = ::open("/proc/self/ctl", O_WRONLY); 1678 if (fd == -1) 1679 return false; 1680 1681 long cmd[] = { PCSET, PR_MSACCT }; 1682 int res = ::write(fd, cmd, sizeof(long) * 2); 1683 ::close(fd); 1684 if (res != sizeof(long) * 2) 1685 return false; 1686 1687 return true; 1688} 1689 1690bool os::vtime_enabled() { 1691 int fd = ::open("/proc/self/status", O_RDONLY); 1692 if (fd == -1) 1693 return false; 1694 1695 pstatus_t status; 1696 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1697 ::close(fd); 1698 if (res != sizeof(pstatus_t)) 1699 return false; 1700 1701 return status.pr_flags & PR_MSACCT; 1702} 1703 1704double os::elapsedVTime() { 1705 return (double)gethrvtime() / (double)hrtime_hz; 1706} 1707 1708// Used internally for comparisons only 1709// getTimeMillis guaranteed to not move backwards on Solaris 1710jlong getTimeMillis() { 1711 jlong nanotime = getTimeNanos(); 1712 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1713} 1714 1715// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1716jlong os::javaTimeMillis() { 1717 timeval t; 1718 if (gettimeofday( &t, NULL) == -1) 1719 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1720 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1721} 1722 1723jlong os::javaTimeNanos() { 1724 return (jlong)getTimeNanos(); 1725} 1726 1727void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1728 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1729 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1730 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1731 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1732} 1733 1734char * os::local_time_string(char *buf, size_t buflen) { 1735 struct tm t; 1736 time_t long_time; 1737 time(&long_time); 1738 localtime_r(&long_time, &t); 1739 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1740 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1741 t.tm_hour, t.tm_min, t.tm_sec); 1742 return buf; 1743} 1744 1745// Note: os::shutdown() might be called very early during initialization, or 1746// called from signal handler. Before adding something to os::shutdown(), make 1747// sure it is async-safe and can handle partially initialized VM. 1748void os::shutdown() { 1749 1750 // allow PerfMemory to attempt cleanup of any persistent resources 1751 perfMemory_exit(); 1752 1753 // needs to remove object in file system 1754 AttachListener::abort(); 1755 1756 // flush buffered output, finish log files 1757 ostream_abort(); 1758 1759 // Check for abort hook 1760 abort_hook_t abort_hook = Arguments::abort_hook(); 1761 if (abort_hook != NULL) { 1762 abort_hook(); 1763 } 1764} 1765 1766// Note: os::abort() might be called very early during initialization, or 1767// called from signal handler. Before adding something to os::abort(), make 1768// sure it is async-safe and can handle partially initialized VM. 1769void os::abort(bool dump_core) { 1770 os::shutdown(); 1771 if (dump_core) { 1772#ifndef PRODUCT 1773 fdStream out(defaultStream::output_fd()); 1774 out.print_raw("Current thread is "); 1775 char buf[16]; 1776 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1777 out.print_raw_cr(buf); 1778 out.print_raw_cr("Dumping core ..."); 1779#endif 1780 ::abort(); // dump core (for debugging) 1781 } 1782 1783 ::exit(1); 1784} 1785 1786// Die immediately, no exit hook, no abort hook, no cleanup. 1787void os::die() { 1788 ::abort(); // dump core (for debugging) 1789} 1790 1791// unused 1792void os::set_error_file(const char *logfile) {} 1793 1794// DLL functions 1795 1796const char* os::dll_file_extension() { return ".so"; } 1797 1798// This must be hard coded because it's the system's temporary 1799// directory not the java application's temp directory, ala java.io.tmpdir. 1800const char* os::get_temp_directory() { return "/tmp"; } 1801 1802static bool file_exists(const char* filename) { 1803 struct stat statbuf; 1804 if (filename == NULL || strlen(filename) == 0) { 1805 return false; 1806 } 1807 return os::stat(filename, &statbuf) == 0; 1808} 1809 1810bool os::dll_build_name(char* buffer, size_t buflen, 1811 const char* pname, const char* fname) { 1812 bool retval = false; 1813 const size_t pnamelen = pname ? strlen(pname) : 0; 1814 1815 // Return error on buffer overflow. 1816 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1817 return retval; 1818 } 1819 1820 if (pnamelen == 0) { 1821 snprintf(buffer, buflen, "lib%s.so", fname); 1822 retval = true; 1823 } else if (strchr(pname, *os::path_separator()) != NULL) { 1824 int n; 1825 char** pelements = split_path(pname, &n); 1826 if (pelements == NULL) { 1827 return false; 1828 } 1829 for (int i = 0 ; i < n ; i++) { 1830 // really shouldn't be NULL but what the heck, check can't hurt 1831 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1832 continue; // skip the empty path values 1833 } 1834 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1835 if (file_exists(buffer)) { 1836 retval = true; 1837 break; 1838 } 1839 } 1840 // release the storage 1841 for (int i = 0 ; i < n ; i++) { 1842 if (pelements[i] != NULL) { 1843 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1844 } 1845 } 1846 if (pelements != NULL) { 1847 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1848 } 1849 } else { 1850 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1851 retval = true; 1852 } 1853 return retval; 1854} 1855 1856// check if addr is inside libjvm.so 1857bool os::address_is_in_vm(address addr) { 1858 static address libjvm_base_addr; 1859 Dl_info dlinfo; 1860 1861 if (libjvm_base_addr == NULL) { 1862 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1863 libjvm_base_addr = (address)dlinfo.dli_fbase; 1864 } 1865 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1866 } 1867 1868 if (dladdr((void *)addr, &dlinfo) != 0) { 1869 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1870 } 1871 1872 return false; 1873} 1874 1875typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1876static dladdr1_func_type dladdr1_func = NULL; 1877 1878bool os::dll_address_to_function_name(address addr, char *buf, 1879 int buflen, int * offset) { 1880 // buf is not optional, but offset is optional 1881 assert(buf != NULL, "sanity check"); 1882 1883 Dl_info dlinfo; 1884 1885 // dladdr1_func was initialized in os::init() 1886 if (dladdr1_func != NULL) { 1887 // yes, we have dladdr1 1888 1889 // Support for dladdr1 is checked at runtime; it may be 1890 // available even if the vm is built on a machine that does 1891 // not have dladdr1 support. Make sure there is a value for 1892 // RTLD_DL_SYMENT. 1893 #ifndef RTLD_DL_SYMENT 1894 #define RTLD_DL_SYMENT 1 1895 #endif 1896#ifdef _LP64 1897 Elf64_Sym * info; 1898#else 1899 Elf32_Sym * info; 1900#endif 1901 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1902 RTLD_DL_SYMENT) != 0) { 1903 // see if we have a matching symbol that covers our address 1904 if (dlinfo.dli_saddr != NULL && 1905 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1906 if (dlinfo.dli_sname != NULL) { 1907 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1908 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1909 } 1910 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1911 return true; 1912 } 1913 } 1914 // no matching symbol so try for just file info 1915 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1916 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1917 buf, buflen, offset, dlinfo.dli_fname)) { 1918 return true; 1919 } 1920 } 1921 } 1922 buf[0] = '\0'; 1923 if (offset != NULL) *offset = -1; 1924 return false; 1925 } 1926 1927 // no, only dladdr is available 1928 if (dladdr((void *)addr, &dlinfo) != 0) { 1929 // see if we have a matching symbol 1930 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1931 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1932 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1933 } 1934 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1935 return true; 1936 } 1937 // no matching symbol so try for just file info 1938 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1939 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1940 buf, buflen, offset, dlinfo.dli_fname)) { 1941 return true; 1942 } 1943 } 1944 } 1945 buf[0] = '\0'; 1946 if (offset != NULL) *offset = -1; 1947 return false; 1948} 1949 1950bool os::dll_address_to_library_name(address addr, char* buf, 1951 int buflen, int* offset) { 1952 // buf is not optional, but offset is optional 1953 assert(buf != NULL, "sanity check"); 1954 1955 Dl_info dlinfo; 1956 1957 if (dladdr((void*)addr, &dlinfo) != 0) { 1958 if (dlinfo.dli_fname != NULL) { 1959 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1960 } 1961 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1962 *offset = addr - (address)dlinfo.dli_fbase; 1963 } 1964 return true; 1965 } 1966 1967 buf[0] = '\0'; 1968 if (offset) *offset = -1; 1969 return false; 1970} 1971 1972// Prints the names and full paths of all opened dynamic libraries 1973// for current process 1974void os::print_dll_info(outputStream * st) { 1975 Dl_info dli; 1976 void *handle; 1977 Link_map *map; 1978 Link_map *p; 1979 1980 st->print_cr("Dynamic libraries:"); st->flush(); 1981 1982 if (dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli) == 0 || 1983 dli.dli_fname == NULL) { 1984 st->print_cr("Error: Cannot print dynamic libraries."); 1985 return; 1986 } 1987 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1988 if (handle == NULL) { 1989 st->print_cr("Error: Cannot print dynamic libraries."); 1990 return; 1991 } 1992 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1993 if (map == NULL) { 1994 st->print_cr("Error: Cannot print dynamic libraries."); 1995 return; 1996 } 1997 1998 while (map->l_prev != NULL) 1999 map = map->l_prev; 2000 2001 while (map != NULL) { 2002 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2003 map = map->l_next; 2004 } 2005 2006 dlclose(handle); 2007} 2008 2009 // Loads .dll/.so and 2010 // in case of error it checks if .dll/.so was built for the 2011 // same architecture as Hotspot is running on 2012 2013void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2014{ 2015 void * result= ::dlopen(filename, RTLD_LAZY); 2016 if (result != NULL) { 2017 // Successful loading 2018 return result; 2019 } 2020 2021 Elf32_Ehdr elf_head; 2022 2023 // Read system error message into ebuf 2024 // It may or may not be overwritten below 2025 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2026 ebuf[ebuflen-1]='\0'; 2027 int diag_msg_max_length=ebuflen-strlen(ebuf); 2028 char* diag_msg_buf=ebuf+strlen(ebuf); 2029 2030 if (diag_msg_max_length==0) { 2031 // No more space in ebuf for additional diagnostics message 2032 return NULL; 2033 } 2034 2035 2036 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2037 2038 if (file_descriptor < 0) { 2039 // Can't open library, report dlerror() message 2040 return NULL; 2041 } 2042 2043 bool failed_to_read_elf_head= 2044 (sizeof(elf_head)!= 2045 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2046 2047 ::close(file_descriptor); 2048 if (failed_to_read_elf_head) { 2049 // file i/o error - report dlerror() msg 2050 return NULL; 2051 } 2052 2053 typedef struct { 2054 Elf32_Half code; // Actual value as defined in elf.h 2055 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2056 char elf_class; // 32 or 64 bit 2057 char endianess; // MSB or LSB 2058 char* name; // String representation 2059 } arch_t; 2060 2061 static const arch_t arch_array[]={ 2062 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2063 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2064 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2065 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2066 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2067 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2068 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2069 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2070 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2071 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2072 }; 2073 2074 #if (defined IA32) 2075 static Elf32_Half running_arch_code=EM_386; 2076 #elif (defined AMD64) 2077 static Elf32_Half running_arch_code=EM_X86_64; 2078 #elif (defined IA64) 2079 static Elf32_Half running_arch_code=EM_IA_64; 2080 #elif (defined __sparc) && (defined _LP64) 2081 static Elf32_Half running_arch_code=EM_SPARCV9; 2082 #elif (defined __sparc) && (!defined _LP64) 2083 static Elf32_Half running_arch_code=EM_SPARC; 2084 #elif (defined __powerpc64__) 2085 static Elf32_Half running_arch_code=EM_PPC64; 2086 #elif (defined __powerpc__) 2087 static Elf32_Half running_arch_code=EM_PPC; 2088 #elif (defined ARM) 2089 static Elf32_Half running_arch_code=EM_ARM; 2090 #else 2091 #error Method os::dll_load requires that one of following is defined:\ 2092 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2093 #endif 2094 2095 // Identify compatability class for VM's architecture and library's architecture 2096 // Obtain string descriptions for architectures 2097 2098 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2099 int running_arch_index=-1; 2100 2101 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2102 if (running_arch_code == arch_array[i].code) { 2103 running_arch_index = i; 2104 } 2105 if (lib_arch.code == arch_array[i].code) { 2106 lib_arch.compat_class = arch_array[i].compat_class; 2107 lib_arch.name = arch_array[i].name; 2108 } 2109 } 2110 2111 assert(running_arch_index != -1, 2112 "Didn't find running architecture code (running_arch_code) in arch_array"); 2113 if (running_arch_index == -1) { 2114 // Even though running architecture detection failed 2115 // we may still continue with reporting dlerror() message 2116 return NULL; 2117 } 2118 2119 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2120 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2121 return NULL; 2122 } 2123 2124 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2125 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2126 return NULL; 2127 } 2128 2129 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2130 if ( lib_arch.name!=NULL ) { 2131 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2132 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2133 lib_arch.name, arch_array[running_arch_index].name); 2134 } else { 2135 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2136 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2137 lib_arch.code, 2138 arch_array[running_arch_index].name); 2139 } 2140 } 2141 2142 return NULL; 2143} 2144 2145void* os::dll_lookup(void* handle, const char* name) { 2146 return dlsym(handle, name); 2147} 2148 2149void* os::get_default_process_handle() { 2150 return (void*)::dlopen(NULL, RTLD_LAZY); 2151} 2152 2153int os::stat(const char *path, struct stat *sbuf) { 2154 char pathbuf[MAX_PATH]; 2155 if (strlen(path) > MAX_PATH - 1) { 2156 errno = ENAMETOOLONG; 2157 return -1; 2158 } 2159 os::native_path(strcpy(pathbuf, path)); 2160 return ::stat(pathbuf, sbuf); 2161} 2162 2163static bool _print_ascii_file(const char* filename, outputStream* st) { 2164 int fd = ::open(filename, O_RDONLY); 2165 if (fd == -1) { 2166 return false; 2167 } 2168 2169 char buf[32]; 2170 int bytes; 2171 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2172 st->print_raw(buf, bytes); 2173 } 2174 2175 ::close(fd); 2176 2177 return true; 2178} 2179 2180void os::print_os_info_brief(outputStream* st) { 2181 os::Solaris::print_distro_info(st); 2182 2183 os::Posix::print_uname_info(st); 2184 2185 os::Solaris::print_libversion_info(st); 2186} 2187 2188void os::print_os_info(outputStream* st) { 2189 st->print("OS:"); 2190 2191 os::Solaris::print_distro_info(st); 2192 2193 os::Posix::print_uname_info(st); 2194 2195 os::Solaris::print_libversion_info(st); 2196 2197 os::Posix::print_rlimit_info(st); 2198 2199 os::Posix::print_load_average(st); 2200} 2201 2202void os::Solaris::print_distro_info(outputStream* st) { 2203 if (!_print_ascii_file("/etc/release", st)) { 2204 st->print("Solaris"); 2205 } 2206 st->cr(); 2207} 2208 2209void os::Solaris::print_libversion_info(outputStream* st) { 2210 if (os::Solaris::T2_libthread()) { 2211 st->print(" (T2 libthread)"); 2212 } 2213 else { 2214 st->print(" (T1 libthread)"); 2215 } 2216 st->cr(); 2217} 2218 2219static bool check_addr0(outputStream* st) { 2220 jboolean status = false; 2221 int fd = ::open("/proc/self/map",O_RDONLY); 2222 if (fd >= 0) { 2223 prmap_t p; 2224 while(::read(fd, &p, sizeof(p)) > 0) { 2225 if (p.pr_vaddr == 0x0) { 2226 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2227 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2228 st->print("Access:"); 2229 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2230 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2231 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2232 st->cr(); 2233 status = true; 2234 } 2235 ::close(fd); 2236 } 2237 } 2238 return status; 2239} 2240 2241void os::pd_print_cpu_info(outputStream* st) { 2242 // Nothing to do for now. 2243} 2244 2245void os::print_memory_info(outputStream* st) { 2246 st->print("Memory:"); 2247 st->print(" %dk page", os::vm_page_size()>>10); 2248 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2249 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2250 st->cr(); 2251 (void) check_addr0(st); 2252} 2253 2254// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2255// but they're the same for all the solaris architectures that we support. 2256const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2257 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2258 "ILL_COPROC", "ILL_BADSTK" }; 2259 2260const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2261 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2262 "FPE_FLTINV", "FPE_FLTSUB" }; 2263 2264const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2265 2266const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2267 2268void os::print_siginfo(outputStream* st, void* siginfo) { 2269 st->print("siginfo:"); 2270 2271 const int buflen = 100; 2272 char buf[buflen]; 2273 siginfo_t *si = (siginfo_t*)siginfo; 2274 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2275 char *err = strerror(si->si_errno); 2276 if (si->si_errno != 0 && err != NULL) { 2277 st->print("si_errno=%s", err); 2278 } else { 2279 st->print("si_errno=%d", si->si_errno); 2280 } 2281 const int c = si->si_code; 2282 assert(c > 0, "unexpected si_code"); 2283 switch (si->si_signo) { 2284 case SIGILL: 2285 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2286 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2287 break; 2288 case SIGFPE: 2289 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2290 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2291 break; 2292 case SIGSEGV: 2293 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2294 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2295 break; 2296 case SIGBUS: 2297 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2298 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2299 break; 2300 default: 2301 st->print(", si_code=%d", si->si_code); 2302 // no si_addr 2303 } 2304 2305 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2306 UseSharedSpaces) { 2307 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2308 if (mapinfo->is_in_shared_space(si->si_addr)) { 2309 st->print("\n\nError accessing class data sharing archive." \ 2310 " Mapped file inaccessible during execution, " \ 2311 " possible disk/network problem."); 2312 } 2313 } 2314 st->cr(); 2315} 2316 2317// Moved from whole group, because we need them here for diagnostic 2318// prints. 2319#define OLDMAXSIGNUM 32 2320static int Maxsignum = 0; 2321static int *ourSigFlags = NULL; 2322 2323extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2324 2325int os::Solaris::get_our_sigflags(int sig) { 2326 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2327 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2328 return ourSigFlags[sig]; 2329} 2330 2331void os::Solaris::set_our_sigflags(int sig, int flags) { 2332 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2333 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2334 ourSigFlags[sig] = flags; 2335} 2336 2337 2338static const char* get_signal_handler_name(address handler, 2339 char* buf, int buflen) { 2340 int offset; 2341 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2342 if (found) { 2343 // skip directory names 2344 const char *p1, *p2; 2345 p1 = buf; 2346 size_t len = strlen(os::file_separator()); 2347 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2348 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2349 } else { 2350 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2351 } 2352 return buf; 2353} 2354 2355static void print_signal_handler(outputStream* st, int sig, 2356 char* buf, size_t buflen) { 2357 struct sigaction sa; 2358 2359 sigaction(sig, NULL, &sa); 2360 2361 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2362 2363 address handler = (sa.sa_flags & SA_SIGINFO) 2364 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2365 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2366 2367 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2368 st->print("SIG_DFL"); 2369 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2370 st->print("SIG_IGN"); 2371 } else { 2372 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2373 } 2374 2375 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2376 2377 address rh = VMError::get_resetted_sighandler(sig); 2378 // May be, handler was resetted by VMError? 2379 if(rh != NULL) { 2380 handler = rh; 2381 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2382 } 2383 2384 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2385 2386 // Check: is it our handler? 2387 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2388 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2389 // It is our signal handler 2390 // check for flags 2391 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2392 st->print( 2393 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2394 os::Solaris::get_our_sigflags(sig)); 2395 } 2396 } 2397 st->cr(); 2398} 2399 2400void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2401 st->print_cr("Signal Handlers:"); 2402 print_signal_handler(st, SIGSEGV, buf, buflen); 2403 print_signal_handler(st, SIGBUS , buf, buflen); 2404 print_signal_handler(st, SIGFPE , buf, buflen); 2405 print_signal_handler(st, SIGPIPE, buf, buflen); 2406 print_signal_handler(st, SIGXFSZ, buf, buflen); 2407 print_signal_handler(st, SIGILL , buf, buflen); 2408 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2409 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2410 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2411 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2412 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2413 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2414 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2415 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2416} 2417 2418static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2419 2420// Find the full path to the current module, libjvm.so 2421void os::jvm_path(char *buf, jint buflen) { 2422 // Error checking. 2423 if (buflen < MAXPATHLEN) { 2424 assert(false, "must use a large-enough buffer"); 2425 buf[0] = '\0'; 2426 return; 2427 } 2428 // Lazy resolve the path to current module. 2429 if (saved_jvm_path[0] != 0) { 2430 strcpy(buf, saved_jvm_path); 2431 return; 2432 } 2433 2434 Dl_info dlinfo; 2435 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2436 assert(ret != 0, "cannot locate libjvm"); 2437 if (ret != 0 && dlinfo.dli_fname != NULL) { 2438 realpath((char *)dlinfo.dli_fname, buf); 2439 } else { 2440 buf[0] = '\0'; 2441 return; 2442 } 2443 2444 if (Arguments::sun_java_launcher_is_altjvm()) { 2445 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2446 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2447 // If "/jre/lib/" appears at the right place in the string, then 2448 // assume we are installed in a JDK and we're done. Otherwise, check 2449 // for a JAVA_HOME environment variable and fix up the path so it 2450 // looks like libjvm.so is installed there (append a fake suffix 2451 // hotspot/libjvm.so). 2452 const char *p = buf + strlen(buf) - 1; 2453 for (int count = 0; p > buf && count < 5; ++count) { 2454 for (--p; p > buf && *p != '/'; --p) 2455 /* empty */ ; 2456 } 2457 2458 if (strncmp(p, "/jre/lib/", 9) != 0) { 2459 // Look for JAVA_HOME in the environment. 2460 char* java_home_var = ::getenv("JAVA_HOME"); 2461 if (java_home_var != NULL && java_home_var[0] != 0) { 2462 char cpu_arch[12]; 2463 char* jrelib_p; 2464 int len; 2465 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2466#ifdef _LP64 2467 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2468 if (strcmp(cpu_arch, "sparc") == 0) { 2469 strcat(cpu_arch, "v9"); 2470 } else if (strcmp(cpu_arch, "i386") == 0) { 2471 strcpy(cpu_arch, "amd64"); 2472 } 2473#endif 2474 // Check the current module name "libjvm.so". 2475 p = strrchr(buf, '/'); 2476 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2477 2478 realpath(java_home_var, buf); 2479 // determine if this is a legacy image or modules image 2480 // modules image doesn't have "jre" subdirectory 2481 len = strlen(buf); 2482 jrelib_p = buf + len; 2483 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2484 if (0 != access(buf, F_OK)) { 2485 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2486 } 2487 2488 if (0 == access(buf, F_OK)) { 2489 // Use current module name "libjvm.so" 2490 len = strlen(buf); 2491 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2492 } else { 2493 // Go back to path of .so 2494 realpath((char *)dlinfo.dli_fname, buf); 2495 } 2496 } 2497 } 2498 } 2499 2500 strcpy(saved_jvm_path, buf); 2501} 2502 2503 2504void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2505 // no prefix required, not even "_" 2506} 2507 2508 2509void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2510 // no suffix required 2511} 2512 2513// This method is a copy of JDK's sysGetLastErrorString 2514// from src/solaris/hpi/src/system_md.c 2515 2516size_t os::lasterror(char *buf, size_t len) { 2517 2518 if (errno == 0) return 0; 2519 2520 const char *s = ::strerror(errno); 2521 size_t n = ::strlen(s); 2522 if (n >= len) { 2523 n = len - 1; 2524 } 2525 ::strncpy(buf, s, n); 2526 buf[n] = '\0'; 2527 return n; 2528} 2529 2530 2531// sun.misc.Signal 2532 2533extern "C" { 2534 static void UserHandler(int sig, void *siginfo, void *context) { 2535 // Ctrl-C is pressed during error reporting, likely because the error 2536 // handler fails to abort. Let VM die immediately. 2537 if (sig == SIGINT && is_error_reported()) { 2538 os::die(); 2539 } 2540 2541 os::signal_notify(sig); 2542 // We do not need to reinstate the signal handler each time... 2543 } 2544} 2545 2546void* os::user_handler() { 2547 return CAST_FROM_FN_PTR(void*, UserHandler); 2548} 2549 2550class Semaphore : public StackObj { 2551 public: 2552 Semaphore(); 2553 ~Semaphore(); 2554 void signal(); 2555 void wait(); 2556 bool trywait(); 2557 bool timedwait(unsigned int sec, int nsec); 2558 private: 2559 sema_t _semaphore; 2560}; 2561 2562 2563Semaphore::Semaphore() { 2564 sema_init(&_semaphore, 0, NULL, NULL); 2565} 2566 2567Semaphore::~Semaphore() { 2568 sema_destroy(&_semaphore); 2569} 2570 2571void Semaphore::signal() { 2572 sema_post(&_semaphore); 2573} 2574 2575void Semaphore::wait() { 2576 sema_wait(&_semaphore); 2577} 2578 2579bool Semaphore::trywait() { 2580 return sema_trywait(&_semaphore) == 0; 2581} 2582 2583bool Semaphore::timedwait(unsigned int sec, int nsec) { 2584 struct timespec ts; 2585 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2586 2587 while (1) { 2588 int result = sema_timedwait(&_semaphore, &ts); 2589 if (result == 0) { 2590 return true; 2591 } else if (errno == EINTR) { 2592 continue; 2593 } else if (errno == ETIME) { 2594 return false; 2595 } else { 2596 return false; 2597 } 2598 } 2599} 2600 2601extern "C" { 2602 typedef void (*sa_handler_t)(int); 2603 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2604} 2605 2606void* os::signal(int signal_number, void* handler) { 2607 struct sigaction sigAct, oldSigAct; 2608 sigfillset(&(sigAct.sa_mask)); 2609 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2610 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2611 2612 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2613 // -1 means registration failed 2614 return (void *)-1; 2615 2616 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2617} 2618 2619void os::signal_raise(int signal_number) { 2620 raise(signal_number); 2621} 2622 2623/* 2624 * The following code is moved from os.cpp for making this 2625 * code platform specific, which it is by its very nature. 2626 */ 2627 2628// a counter for each possible signal value 2629static int Sigexit = 0; 2630static int Maxlibjsigsigs; 2631static jint *pending_signals = NULL; 2632static int *preinstalled_sigs = NULL; 2633static struct sigaction *chainedsigactions = NULL; 2634static sema_t sig_sem; 2635typedef int (*version_getting_t)(); 2636version_getting_t os::Solaris::get_libjsig_version = NULL; 2637static int libjsigversion = NULL; 2638 2639int os::sigexitnum_pd() { 2640 assert(Sigexit > 0, "signal memory not yet initialized"); 2641 return Sigexit; 2642} 2643 2644void os::Solaris::init_signal_mem() { 2645 // Initialize signal structures 2646 Maxsignum = SIGRTMAX; 2647 Sigexit = Maxsignum+1; 2648 assert(Maxsignum >0, "Unable to obtain max signal number"); 2649 2650 Maxlibjsigsigs = Maxsignum; 2651 2652 // pending_signals has one int per signal 2653 // The additional signal is for SIGEXIT - exit signal to signal_thread 2654 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2655 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2656 2657 if (UseSignalChaining) { 2658 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2659 * (Maxsignum + 1), mtInternal); 2660 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2661 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2662 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2663 } 2664 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal); 2665 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2666} 2667 2668void os::signal_init_pd() { 2669 int ret; 2670 2671 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2672 assert(ret == 0, "sema_init() failed"); 2673} 2674 2675void os::signal_notify(int signal_number) { 2676 int ret; 2677 2678 Atomic::inc(&pending_signals[signal_number]); 2679 ret = ::sema_post(&sig_sem); 2680 assert(ret == 0, "sema_post() failed"); 2681} 2682 2683static int check_pending_signals(bool wait_for_signal) { 2684 int ret; 2685 while (true) { 2686 for (int i = 0; i < Sigexit + 1; i++) { 2687 jint n = pending_signals[i]; 2688 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2689 return i; 2690 } 2691 } 2692 if (!wait_for_signal) { 2693 return -1; 2694 } 2695 JavaThread *thread = JavaThread::current(); 2696 ThreadBlockInVM tbivm(thread); 2697 2698 bool threadIsSuspended; 2699 do { 2700 thread->set_suspend_equivalent(); 2701 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2702 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2703 ; 2704 assert(ret == 0, "sema_wait() failed"); 2705 2706 // were we externally suspended while we were waiting? 2707 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2708 if (threadIsSuspended) { 2709 // 2710 // The semaphore has been incremented, but while we were waiting 2711 // another thread suspended us. We don't want to continue running 2712 // while suspended because that would surprise the thread that 2713 // suspended us. 2714 // 2715 ret = ::sema_post(&sig_sem); 2716 assert(ret == 0, "sema_post() failed"); 2717 2718 thread->java_suspend_self(); 2719 } 2720 } while (threadIsSuspended); 2721 } 2722} 2723 2724int os::signal_lookup() { 2725 return check_pending_signals(false); 2726} 2727 2728int os::signal_wait() { 2729 return check_pending_signals(true); 2730} 2731 2732//////////////////////////////////////////////////////////////////////////////// 2733// Virtual Memory 2734 2735static int page_size = -1; 2736 2737// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2738// clear this var if support is not available. 2739static bool has_map_align = true; 2740 2741int os::vm_page_size() { 2742 assert(page_size != -1, "must call os::init"); 2743 return page_size; 2744} 2745 2746// Solaris allocates memory by pages. 2747int os::vm_allocation_granularity() { 2748 assert(page_size != -1, "must call os::init"); 2749 return page_size; 2750} 2751 2752static bool recoverable_mmap_error(int err) { 2753 // See if the error is one we can let the caller handle. This 2754 // list of errno values comes from the Solaris mmap(2) man page. 2755 switch (err) { 2756 case EBADF: 2757 case EINVAL: 2758 case ENOTSUP: 2759 // let the caller deal with these errors 2760 return true; 2761 2762 default: 2763 // Any remaining errors on this OS can cause our reserved mapping 2764 // to be lost. That can cause confusion where different data 2765 // structures think they have the same memory mapped. The worst 2766 // scenario is if both the VM and a library think they have the 2767 // same memory mapped. 2768 return false; 2769 } 2770} 2771 2772static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2773 int err) { 2774 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2775 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2776 strerror(err), err); 2777} 2778 2779static void warn_fail_commit_memory(char* addr, size_t bytes, 2780 size_t alignment_hint, bool exec, 2781 int err) { 2782 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2783 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2784 alignment_hint, exec, strerror(err), err); 2785} 2786 2787int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2788 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2789 size_t size = bytes; 2790 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2791 if (res != NULL) { 2792 if (UseNUMAInterleaving) { 2793 numa_make_global(addr, bytes); 2794 } 2795 return 0; 2796 } 2797 2798 int err = errno; // save errno from mmap() call in mmap_chunk() 2799 2800 if (!recoverable_mmap_error(err)) { 2801 warn_fail_commit_memory(addr, bytes, exec, err); 2802 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2803 } 2804 2805 return err; 2806} 2807 2808bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2809 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2810} 2811 2812void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2813 const char* mesg) { 2814 assert(mesg != NULL, "mesg must be specified"); 2815 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2816 if (err != 0) { 2817 // the caller wants all commit errors to exit with the specified mesg: 2818 warn_fail_commit_memory(addr, bytes, exec, err); 2819 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2820 } 2821} 2822 2823int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2824 size_t alignment_hint, bool exec) { 2825 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2826 if (err == 0) { 2827 if (UseLargePages && (alignment_hint > (size_t)vm_page_size())) { 2828 // If the large page size has been set and the VM 2829 // is using large pages, use the large page size 2830 // if it is smaller than the alignment hint. This is 2831 // a case where the VM wants to use a larger alignment size 2832 // for its own reasons but still want to use large pages 2833 // (which is what matters to setting the mpss range. 2834 size_t page_size = 0; 2835 if (large_page_size() < alignment_hint) { 2836 assert(UseLargePages, "Expected to be here for large page use only"); 2837 page_size = large_page_size(); 2838 } else { 2839 // If the alignment hint is less than the large page 2840 // size, the VM wants a particular alignment (thus the hint) 2841 // for internal reasons. Try to set the mpss range using 2842 // the alignment_hint. 2843 page_size = alignment_hint; 2844 } 2845 // Since this is a hint, ignore any failures. 2846 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2847 } 2848 } 2849 return err; 2850} 2851 2852bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2853 bool exec) { 2854 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2855} 2856 2857void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2858 size_t alignment_hint, bool exec, 2859 const char* mesg) { 2860 assert(mesg != NULL, "mesg must be specified"); 2861 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2862 if (err != 0) { 2863 // the caller wants all commit errors to exit with the specified mesg: 2864 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2865 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2866 } 2867} 2868 2869// Uncommit the pages in a specified region. 2870void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2871 if (madvise(addr, bytes, MADV_FREE) < 0) { 2872 debug_only(warning("MADV_FREE failed.")); 2873 return; 2874 } 2875} 2876 2877bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2878 return os::commit_memory(addr, size, !ExecMem); 2879} 2880 2881bool os::remove_stack_guard_pages(char* addr, size_t size) { 2882 return os::uncommit_memory(addr, size); 2883} 2884 2885// Change the page size in a given range. 2886void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2887 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2888 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2889 if (UseLargePages) { 2890 Solaris::setup_large_pages(addr, bytes, alignment_hint); 2891 } 2892} 2893 2894// Tell the OS to make the range local to the first-touching LWP 2895void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2896 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2897 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2898 debug_only(warning("MADV_ACCESS_LWP failed.")); 2899 } 2900} 2901 2902// Tell the OS that this range would be accessed from different LWPs. 2903void os::numa_make_global(char *addr, size_t bytes) { 2904 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2905 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2906 debug_only(warning("MADV_ACCESS_MANY failed.")); 2907 } 2908} 2909 2910// Get the number of the locality groups. 2911size_t os::numa_get_groups_num() { 2912 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2913 return n != -1 ? n : 1; 2914} 2915 2916// Get a list of leaf locality groups. A leaf lgroup is group that 2917// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2918// board. An LWP is assigned to one of these groups upon creation. 2919size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2920 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2921 ids[0] = 0; 2922 return 1; 2923 } 2924 int result_size = 0, top = 1, bottom = 0, cur = 0; 2925 for (int k = 0; k < size; k++) { 2926 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2927 (Solaris::lgrp_id_t*)&ids[top], size - top); 2928 if (r == -1) { 2929 ids[0] = 0; 2930 return 1; 2931 } 2932 if (!r) { 2933 // That's a leaf node. 2934 assert (bottom <= cur, "Sanity check"); 2935 // Check if the node has memory 2936 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2937 NULL, 0, LGRP_RSRC_MEM) > 0) { 2938 ids[bottom++] = ids[cur]; 2939 } 2940 } 2941 top += r; 2942 cur++; 2943 } 2944 if (bottom == 0) { 2945 // Handle a situation, when the OS reports no memory available. 2946 // Assume UMA architecture. 2947 ids[0] = 0; 2948 return 1; 2949 } 2950 return bottom; 2951} 2952 2953// Detect the topology change. Typically happens during CPU plugging-unplugging. 2954bool os::numa_topology_changed() { 2955 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2956 if (is_stale != -1 && is_stale) { 2957 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2958 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2959 assert(c != 0, "Failure to initialize LGRP API"); 2960 Solaris::set_lgrp_cookie(c); 2961 return true; 2962 } 2963 return false; 2964} 2965 2966// Get the group id of the current LWP. 2967int os::numa_get_group_id() { 2968 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2969 if (lgrp_id == -1) { 2970 return 0; 2971 } 2972 const int size = os::numa_get_groups_num(); 2973 int *ids = (int*)alloca(size * sizeof(int)); 2974 2975 // Get the ids of all lgroups with memory; r is the count. 2976 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2977 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2978 if (r <= 0) { 2979 return 0; 2980 } 2981 return ids[os::random() % r]; 2982} 2983 2984// Request information about the page. 2985bool os::get_page_info(char *start, page_info* info) { 2986 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2987 uint64_t addr = (uintptr_t)start; 2988 uint64_t outdata[2]; 2989 uint_t validity = 0; 2990 2991 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2992 return false; 2993 } 2994 2995 info->size = 0; 2996 info->lgrp_id = -1; 2997 2998 if ((validity & 1) != 0) { 2999 if ((validity & 2) != 0) { 3000 info->lgrp_id = outdata[0]; 3001 } 3002 if ((validity & 4) != 0) { 3003 info->size = outdata[1]; 3004 } 3005 return true; 3006 } 3007 return false; 3008} 3009 3010// Scan the pages from start to end until a page different than 3011// the one described in the info parameter is encountered. 3012char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 3013 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 3014 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 3015 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 3016 uint_t validity[MAX_MEMINFO_CNT]; 3017 3018 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 3019 uint64_t p = (uint64_t)start; 3020 while (p < (uint64_t)end) { 3021 addrs[0] = p; 3022 size_t addrs_count = 1; 3023 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 3024 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 3025 addrs_count++; 3026 } 3027 3028 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 3029 return NULL; 3030 } 3031 3032 size_t i = 0; 3033 for (; i < addrs_count; i++) { 3034 if ((validity[i] & 1) != 0) { 3035 if ((validity[i] & 4) != 0) { 3036 if (outdata[types * i + 1] != page_expected->size) { 3037 break; 3038 } 3039 } else 3040 if (page_expected->size != 0) { 3041 break; 3042 } 3043 3044 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 3045 if (outdata[types * i] != page_expected->lgrp_id) { 3046 break; 3047 } 3048 } 3049 } else { 3050 return NULL; 3051 } 3052 } 3053 3054 if (i != addrs_count) { 3055 if ((validity[i] & 2) != 0) { 3056 page_found->lgrp_id = outdata[types * i]; 3057 } else { 3058 page_found->lgrp_id = -1; 3059 } 3060 if ((validity[i] & 4) != 0) { 3061 page_found->size = outdata[types * i + 1]; 3062 } else { 3063 page_found->size = 0; 3064 } 3065 return (char*)addrs[i]; 3066 } 3067 3068 p = addrs[addrs_count - 1] + page_size; 3069 } 3070 return end; 3071} 3072 3073bool os::pd_uncommit_memory(char* addr, size_t bytes) { 3074 size_t size = bytes; 3075 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3076 // uncommitted page. Otherwise, the read/write might succeed if we 3077 // have enough swap space to back the physical page. 3078 return 3079 NULL != Solaris::mmap_chunk(addr, size, 3080 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3081 PROT_NONE); 3082} 3083 3084char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3085 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3086 3087 if (b == MAP_FAILED) { 3088 return NULL; 3089 } 3090 return b; 3091} 3092 3093char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3094 char* addr = requested_addr; 3095 int flags = MAP_PRIVATE | MAP_NORESERVE; 3096 3097 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3098 3099 if (fixed) { 3100 flags |= MAP_FIXED; 3101 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3102 flags |= MAP_ALIGN; 3103 addr = (char*) alignment_hint; 3104 } 3105 3106 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3107 // uncommitted page. Otherwise, the read/write might succeed if we 3108 // have enough swap space to back the physical page. 3109 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3110} 3111 3112char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3113 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3114 3115 guarantee(requested_addr == NULL || requested_addr == addr, 3116 "OS failed to return requested mmap address."); 3117 return addr; 3118} 3119 3120// Reserve memory at an arbitrary address, only if that area is 3121// available (and not reserved for something else). 3122 3123char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3124 const int max_tries = 10; 3125 char* base[max_tries]; 3126 size_t size[max_tries]; 3127 3128 // Solaris adds a gap between mmap'ed regions. The size of the gap 3129 // is dependent on the requested size and the MMU. Our initial gap 3130 // value here is just a guess and will be corrected later. 3131 bool had_top_overlap = false; 3132 bool have_adjusted_gap = false; 3133 size_t gap = 0x400000; 3134 3135 // Assert only that the size is a multiple of the page size, since 3136 // that's all that mmap requires, and since that's all we really know 3137 // about at this low abstraction level. If we need higher alignment, 3138 // we can either pass an alignment to this method or verify alignment 3139 // in one of the methods further up the call chain. See bug 5044738. 3140 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3141 3142 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3143 // Give it a try, if the kernel honors the hint we can return immediately. 3144 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3145 3146 volatile int err = errno; 3147 if (addr == requested_addr) { 3148 return addr; 3149 } else if (addr != NULL) { 3150 pd_unmap_memory(addr, bytes); 3151 } 3152 3153 if (PrintMiscellaneous && Verbose) { 3154 char buf[256]; 3155 buf[0] = '\0'; 3156 if (addr == NULL) { 3157 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3158 } 3159 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3160 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3161 "%s", bytes, requested_addr, addr, buf); 3162 } 3163 3164 // Address hint method didn't work. Fall back to the old method. 3165 // In theory, once SNV becomes our oldest supported platform, this 3166 // code will no longer be needed. 3167 // 3168 // Repeatedly allocate blocks until the block is allocated at the 3169 // right spot. Give up after max_tries. 3170 int i; 3171 for (i = 0; i < max_tries; ++i) { 3172 base[i] = reserve_memory(bytes); 3173 3174 if (base[i] != NULL) { 3175 // Is this the block we wanted? 3176 if (base[i] == requested_addr) { 3177 size[i] = bytes; 3178 break; 3179 } 3180 3181 // check that the gap value is right 3182 if (had_top_overlap && !have_adjusted_gap) { 3183 size_t actual_gap = base[i-1] - base[i] - bytes; 3184 if (gap != actual_gap) { 3185 // adjust the gap value and retry the last 2 allocations 3186 assert(i > 0, "gap adjustment code problem"); 3187 have_adjusted_gap = true; // adjust the gap only once, just in case 3188 gap = actual_gap; 3189 if (PrintMiscellaneous && Verbose) { 3190 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3191 } 3192 unmap_memory(base[i], bytes); 3193 unmap_memory(base[i-1], size[i-1]); 3194 i-=2; 3195 continue; 3196 } 3197 } 3198 3199 // Does this overlap the block we wanted? Give back the overlapped 3200 // parts and try again. 3201 // 3202 // There is still a bug in this code: if top_overlap == bytes, 3203 // the overlap is offset from requested region by the value of gap. 3204 // In this case giving back the overlapped part will not work, 3205 // because we'll give back the entire block at base[i] and 3206 // therefore the subsequent allocation will not generate a new gap. 3207 // This could be fixed with a new algorithm that used larger 3208 // or variable size chunks to find the requested region - 3209 // but such a change would introduce additional complications. 3210 // It's rare enough that the planets align for this bug, 3211 // so we'll just wait for a fix for 6204603/5003415 which 3212 // will provide a mmap flag to allow us to avoid this business. 3213 3214 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3215 if (top_overlap >= 0 && top_overlap < bytes) { 3216 had_top_overlap = true; 3217 unmap_memory(base[i], top_overlap); 3218 base[i] += top_overlap; 3219 size[i] = bytes - top_overlap; 3220 } else { 3221 size_t bottom_overlap = base[i] + bytes - requested_addr; 3222 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3223 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3224 warning("attempt_reserve_memory_at: possible alignment bug"); 3225 } 3226 unmap_memory(requested_addr, bottom_overlap); 3227 size[i] = bytes - bottom_overlap; 3228 } else { 3229 size[i] = bytes; 3230 } 3231 } 3232 } 3233 } 3234 3235 // Give back the unused reserved pieces. 3236 3237 for (int j = 0; j < i; ++j) { 3238 if (base[j] != NULL) { 3239 unmap_memory(base[j], size[j]); 3240 } 3241 } 3242 3243 return (i < max_tries) ? requested_addr : NULL; 3244} 3245 3246bool os::pd_release_memory(char* addr, size_t bytes) { 3247 size_t size = bytes; 3248 return munmap(addr, size) == 0; 3249} 3250 3251static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3252 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3253 "addr must be page aligned"); 3254 int retVal = mprotect(addr, bytes, prot); 3255 return retVal == 0; 3256} 3257 3258// Protect memory (Used to pass readonly pages through 3259// JNI GetArray<type>Elements with empty arrays.) 3260// Also, used for serialization page and for compressed oops null pointer 3261// checking. 3262bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3263 bool is_committed) { 3264 unsigned int p = 0; 3265 switch (prot) { 3266 case MEM_PROT_NONE: p = PROT_NONE; break; 3267 case MEM_PROT_READ: p = PROT_READ; break; 3268 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3269 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3270 default: 3271 ShouldNotReachHere(); 3272 } 3273 // is_committed is unused. 3274 return solaris_mprotect(addr, bytes, p); 3275} 3276 3277// guard_memory and unguard_memory only happens within stack guard pages. 3278// Since ISM pertains only to the heap, guard and unguard memory should not 3279/// happen with an ISM region. 3280bool os::guard_memory(char* addr, size_t bytes) { 3281 return solaris_mprotect(addr, bytes, PROT_NONE); 3282} 3283 3284bool os::unguard_memory(char* addr, size_t bytes) { 3285 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3286} 3287 3288// Large page support 3289static size_t _large_page_size = 0; 3290 3291// Insertion sort for small arrays (descending order). 3292static void insertion_sort_descending(size_t* array, int len) { 3293 for (int i = 0; i < len; i++) { 3294 size_t val = array[i]; 3295 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3296 size_t tmp = array[key]; 3297 array[key] = array[key - 1]; 3298 array[key - 1] = tmp; 3299 } 3300 } 3301} 3302 3303bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 3304 const unsigned int usable_count = VM_Version::page_size_count(); 3305 if (usable_count == 1) { 3306 return false; 3307 } 3308 3309 // Find the right getpagesizes interface. When solaris 11 is the minimum 3310 // build platform, getpagesizes() (without the '2') can be called directly. 3311 typedef int (*gps_t)(size_t[], int); 3312 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3313 if (gps_func == NULL) { 3314 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3315 if (gps_func == NULL) { 3316 if (warn) { 3317 warning("MPSS is not supported by the operating system."); 3318 } 3319 return false; 3320 } 3321 } 3322 3323 // Fill the array of page sizes. 3324 int n = (*gps_func)(_page_sizes, page_sizes_max); 3325 assert(n > 0, "Solaris bug?"); 3326 3327 if (n == page_sizes_max) { 3328 // Add a sentinel value (necessary only if the array was completely filled 3329 // since it is static (zeroed at initialization)). 3330 _page_sizes[--n] = 0; 3331 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3332 } 3333 assert(_page_sizes[n] == 0, "missing sentinel"); 3334 trace_page_sizes("available page sizes", _page_sizes, n); 3335 3336 if (n == 1) return false; // Only one page size available. 3337 3338 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3339 // select up to usable_count elements. First sort the array, find the first 3340 // acceptable value, then copy the usable sizes to the top of the array and 3341 // trim the rest. Make sure to include the default page size :-). 3342 // 3343 // A better policy could get rid of the 4M limit by taking the sizes of the 3344 // important VM memory regions (java heap and possibly the code cache) into 3345 // account. 3346 insertion_sort_descending(_page_sizes, n); 3347 const size_t size_limit = 3348 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3349 int beg; 3350 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3351 const int end = MIN2((int)usable_count, n) - 1; 3352 for (int cur = 0; cur < end; ++cur, ++beg) { 3353 _page_sizes[cur] = _page_sizes[beg]; 3354 } 3355 _page_sizes[end] = vm_page_size(); 3356 _page_sizes[end + 1] = 0; 3357 3358 if (_page_sizes[end] > _page_sizes[end - 1]) { 3359 // Default page size is not the smallest; sort again. 3360 insertion_sort_descending(_page_sizes, end + 1); 3361 } 3362 *page_size = _page_sizes[0]; 3363 3364 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3365 return true; 3366} 3367 3368void os::large_page_init() { 3369 if (UseLargePages) { 3370 // print a warning if any large page related flag is specified on command line 3371 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3372 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3373 3374 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3375 } 3376} 3377 3378bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 3379 // Signal to OS that we want large pages for addresses 3380 // from addr, addr + bytes 3381 struct memcntl_mha mpss_struct; 3382 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3383 mpss_struct.mha_pagesize = align; 3384 mpss_struct.mha_flags = 0; 3385 // Upon successful completion, memcntl() returns 0 3386 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3387 debug_only(warning("Attempt to use MPSS failed.")); 3388 return false; 3389 } 3390 return true; 3391} 3392 3393char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3394 fatal("os::reserve_memory_special should not be called on Solaris."); 3395 return NULL; 3396} 3397 3398bool os::release_memory_special(char* base, size_t bytes) { 3399 fatal("os::release_memory_special should not be called on Solaris."); 3400 return false; 3401} 3402 3403size_t os::large_page_size() { 3404 return _large_page_size; 3405} 3406 3407// MPSS allows application to commit large page memory on demand; with ISM 3408// the entire memory region must be allocated as shared memory. 3409bool os::can_commit_large_page_memory() { 3410 return true; 3411} 3412 3413bool os::can_execute_large_page_memory() { 3414 return true; 3415} 3416 3417static int os_sleep(jlong millis, bool interruptible) { 3418 const jlong limit = INT_MAX; 3419 jlong prevtime; 3420 int res; 3421 3422 while (millis > limit) { 3423 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3424 return res; 3425 millis -= limit; 3426 } 3427 3428 // Restart interrupted polls with new parameters until the proper delay 3429 // has been completed. 3430 3431 prevtime = getTimeMillis(); 3432 3433 while (millis > 0) { 3434 jlong newtime; 3435 3436 if (!interruptible) { 3437 // Following assert fails for os::yield_all: 3438 // assert(!thread->is_Java_thread(), "must not be java thread"); 3439 res = poll(NULL, 0, millis); 3440 } else { 3441 JavaThread *jt = JavaThread::current(); 3442 3443 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3444 os::Solaris::clear_interrupted); 3445 } 3446 3447 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3448 // thread.Interrupt. 3449 3450 // See c/r 6751923. Poll can return 0 before time 3451 // has elapsed if time is set via clock_settime (as NTP does). 3452 // res == 0 if poll timed out (see man poll RETURN VALUES) 3453 // using the logic below checks that we really did 3454 // sleep at least "millis" if not we'll sleep again. 3455 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3456 newtime = getTimeMillis(); 3457 assert(newtime >= prevtime, "time moving backwards"); 3458 /* Doing prevtime and newtime in microseconds doesn't help precision, 3459 and trying to round up to avoid lost milliseconds can result in a 3460 too-short delay. */ 3461 millis -= newtime - prevtime; 3462 if(millis <= 0) 3463 return OS_OK; 3464 prevtime = newtime; 3465 } else 3466 return res; 3467 } 3468 3469 return OS_OK; 3470} 3471 3472// Read calls from inside the vm need to perform state transitions 3473size_t os::read(int fd, void *buf, unsigned int nBytes) { 3474 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3475} 3476 3477size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3478 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3479} 3480 3481int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3482 assert(thread == Thread::current(), "thread consistency check"); 3483 3484 // TODO-FIXME: this should be removed. 3485 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3486 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3487 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3488 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3489 // is fooled into believing that the system is making progress. In the code below we block the 3490 // the watcher thread while safepoint is in progress so that it would not appear as though the 3491 // system is making progress. 3492 if (!Solaris::T2_libthread() && 3493 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3494 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3495 // the entire safepoint, the watcher thread will line up here during the safepoint. 3496 Threads_lock->lock_without_safepoint_check(); 3497 Threads_lock->unlock(); 3498 } 3499 3500 if (thread->is_Java_thread()) { 3501 // This is a JavaThread so we honor the _thread_blocked protocol 3502 // even for sleeps of 0 milliseconds. This was originally done 3503 // as a workaround for bug 4338139. However, now we also do it 3504 // to honor the suspend-equivalent protocol. 3505 3506 JavaThread *jt = (JavaThread *) thread; 3507 ThreadBlockInVM tbivm(jt); 3508 3509 jt->set_suspend_equivalent(); 3510 // cleared by handle_special_suspend_equivalent_condition() or 3511 // java_suspend_self() via check_and_wait_while_suspended() 3512 3513 int ret_code; 3514 if (millis <= 0) { 3515 thr_yield(); 3516 ret_code = 0; 3517 } else { 3518 // The original sleep() implementation did not create an 3519 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3520 // I'm preserving that decision for now. 3521 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3522 3523 ret_code = os_sleep(millis, interruptible); 3524 } 3525 3526 // were we externally suspended while we were waiting? 3527 jt->check_and_wait_while_suspended(); 3528 3529 return ret_code; 3530 } 3531 3532 // non-JavaThread from this point on: 3533 3534 if (millis <= 0) { 3535 thr_yield(); 3536 return 0; 3537 } 3538 3539 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3540 3541 return os_sleep(millis, interruptible); 3542} 3543 3544void os::naked_short_sleep(jlong ms) { 3545 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3546 3547 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3548 // Solaris requires -lrt for this. 3549 usleep((ms * 1000)); 3550 3551 return; 3552} 3553 3554// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3555void os::infinite_sleep() { 3556 while (true) { // sleep forever ... 3557 ::sleep(100); // ... 100 seconds at a time 3558 } 3559} 3560 3561// Used to convert frequent JVM_Yield() to nops 3562bool os::dont_yield() { 3563 if (DontYieldALot) { 3564 static hrtime_t last_time = 0; 3565 hrtime_t diff = getTimeNanos() - last_time; 3566 3567 if (diff < DontYieldALotInterval * 1000000) 3568 return true; 3569 3570 last_time += diff; 3571 3572 return false; 3573 } 3574 else { 3575 return false; 3576 } 3577} 3578 3579// Caveat: Solaris os::yield() causes a thread-state transition whereas 3580// the linux and win32 implementations do not. This should be checked. 3581 3582void os::yield() { 3583 // Yields to all threads with same or greater priority 3584 os::sleep(Thread::current(), 0, false); 3585} 3586 3587// Note that yield semantics are defined by the scheduling class to which 3588// the thread currently belongs. Typically, yield will _not yield to 3589// other equal or higher priority threads that reside on the dispatch queues 3590// of other CPUs. 3591 3592os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3593 3594 3595// On Solaris we found that yield_all doesn't always yield to all other threads. 3596// There have been cases where there is a thread ready to execute but it doesn't 3597// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3598// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3599// SIGWAITING signal which will cause a new lwp to be created. So we count the 3600// number of times yield_all is called in the one loop and increase the sleep 3601// time after 8 attempts. If this fails too we increase the concurrency level 3602// so that the starving thread would get an lwp 3603 3604void os::yield_all(int attempts) { 3605 // Yields to all threads, including threads with lower priorities 3606 if (attempts == 0) { 3607 os::sleep(Thread::current(), 1, false); 3608 } else { 3609 int iterations = attempts % 30; 3610 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3611 // thr_setconcurrency and _getconcurrency make sense only under T1. 3612 int noofLWPS = thr_getconcurrency(); 3613 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3614 thr_setconcurrency(thr_getconcurrency() + 1); 3615 } 3616 } else if (iterations < 25) { 3617 os::sleep(Thread::current(), 1, false); 3618 } else { 3619 os::sleep(Thread::current(), 10, false); 3620 } 3621 } 3622} 3623 3624// Called from the tight loops to possibly influence time-sharing heuristics 3625void os::loop_breaker(int attempts) { 3626 os::yield_all(attempts); 3627} 3628 3629 3630// Interface for setting lwp priorities. If we are using T2 libthread, 3631// which forces the use of BoundThreads or we manually set UseBoundThreads, 3632// all of our threads will be assigned to real lwp's. Using the thr_setprio 3633// function is meaningless in this mode so we must adjust the real lwp's priority 3634// The routines below implement the getting and setting of lwp priorities. 3635// 3636// Note: There are three priority scales used on Solaris. Java priotities 3637// which range from 1 to 10, libthread "thr_setprio" scale which range 3638// from 0 to 127, and the current scheduling class of the process we 3639// are running in. This is typically from -60 to +60. 3640// The setting of the lwp priorities in done after a call to thr_setprio 3641// so Java priorities are mapped to libthread priorities and we map from 3642// the latter to lwp priorities. We don't keep priorities stored in 3643// Java priorities since some of our worker threads want to set priorities 3644// higher than all Java threads. 3645// 3646// For related information: 3647// (1) man -s 2 priocntl 3648// (2) man -s 4 priocntl 3649// (3) man dispadmin 3650// = librt.so 3651// = libthread/common/rtsched.c - thrp_setlwpprio(). 3652// = ps -cL <pid> ... to validate priority. 3653// = sched_get_priority_min and _max 3654// pthread_create 3655// sched_setparam 3656// pthread_setschedparam 3657// 3658// Assumptions: 3659// + We assume that all threads in the process belong to the same 3660// scheduling class. IE. an homogenous process. 3661// + Must be root or in IA group to change change "interactive" attribute. 3662// Priocntl() will fail silently. The only indication of failure is when 3663// we read-back the value and notice that it hasn't changed. 3664// + Interactive threads enter the runq at the head, non-interactive at the tail. 3665// + For RT, change timeslice as well. Invariant: 3666// constant "priority integral" 3667// Konst == TimeSlice * (60-Priority) 3668// Given a priority, compute appropriate timeslice. 3669// + Higher numerical values have higher priority. 3670 3671// sched class attributes 3672typedef struct { 3673 int schedPolicy; // classID 3674 int maxPrio; 3675 int minPrio; 3676} SchedInfo; 3677 3678 3679static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3680 3681#ifdef ASSERT 3682static int ReadBackValidate = 1; 3683#endif 3684static int myClass = 0; 3685static int myMin = 0; 3686static int myMax = 0; 3687static int myCur = 0; 3688static bool priocntl_enable = false; 3689 3690static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3691static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3692 3693 3694// lwp_priocntl_init 3695// 3696// Try to determine the priority scale for our process. 3697// 3698// Return errno or 0 if OK. 3699// 3700static int lwp_priocntl_init () { 3701 int rslt; 3702 pcinfo_t ClassInfo; 3703 pcparms_t ParmInfo; 3704 int i; 3705 3706 if (!UseThreadPriorities) return 0; 3707 3708 // We are using Bound threads, we need to determine our priority ranges 3709 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3710 // If ThreadPriorityPolicy is 1, switch tables 3711 if (ThreadPriorityPolicy == 1) { 3712 for (i = 0 ; i < CriticalPriority+1; i++) 3713 os::java_to_os_priority[i] = prio_policy1[i]; 3714 } 3715 if (UseCriticalJavaThreadPriority) { 3716 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3717 // See set_native_priority() and set_lwp_class_and_priority(). 3718 // Save original MaxPriority mapping in case attempt to 3719 // use critical priority fails. 3720 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3721 // Set negative to distinguish from other priorities 3722 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3723 } 3724 } 3725 // Not using Bound Threads, set to ThreadPolicy 1 3726 else { 3727 for ( i = 0 ; i < CriticalPriority+1; i++ ) { 3728 os::java_to_os_priority[i] = prio_policy1[i]; 3729 } 3730 return 0; 3731 } 3732 3733 // Get IDs for a set of well-known scheduling classes. 3734 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3735 // the system. We should have a loop that iterates over the 3736 // classID values, which are known to be "small" integers. 3737 3738 strcpy(ClassInfo.pc_clname, "TS"); 3739 ClassInfo.pc_cid = -1; 3740 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3741 if (rslt < 0) return errno; 3742 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3743 tsLimits.schedPolicy = ClassInfo.pc_cid; 3744 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3745 tsLimits.minPrio = -tsLimits.maxPrio; 3746 3747 strcpy(ClassInfo.pc_clname, "IA"); 3748 ClassInfo.pc_cid = -1; 3749 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3750 if (rslt < 0) return errno; 3751 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3752 iaLimits.schedPolicy = ClassInfo.pc_cid; 3753 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3754 iaLimits.minPrio = -iaLimits.maxPrio; 3755 3756 strcpy(ClassInfo.pc_clname, "RT"); 3757 ClassInfo.pc_cid = -1; 3758 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3759 if (rslt < 0) return errno; 3760 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3761 rtLimits.schedPolicy = ClassInfo.pc_cid; 3762 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3763 rtLimits.minPrio = 0; 3764 3765 strcpy(ClassInfo.pc_clname, "FX"); 3766 ClassInfo.pc_cid = -1; 3767 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3768 if (rslt < 0) return errno; 3769 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3770 fxLimits.schedPolicy = ClassInfo.pc_cid; 3771 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3772 fxLimits.minPrio = 0; 3773 3774 // Query our "current" scheduling class. 3775 // This will normally be IA, TS or, rarely, FX or RT. 3776 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3777 ParmInfo.pc_cid = PC_CLNULL; 3778 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3779 if (rslt < 0) return errno; 3780 myClass = ParmInfo.pc_cid; 3781 3782 // We now know our scheduling classId, get specific information 3783 // about the class. 3784 ClassInfo.pc_cid = myClass; 3785 ClassInfo.pc_clname[0] = 0; 3786 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3787 if (rslt < 0) return errno; 3788 3789 if (ThreadPriorityVerbose) { 3790 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3791 } 3792 3793 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3794 ParmInfo.pc_cid = PC_CLNULL; 3795 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3796 if (rslt < 0) return errno; 3797 3798 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3799 myMin = rtLimits.minPrio; 3800 myMax = rtLimits.maxPrio; 3801 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3802 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3803 myMin = iaLimits.minPrio; 3804 myMax = iaLimits.maxPrio; 3805 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3806 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3807 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3808 myMin = tsLimits.minPrio; 3809 myMax = tsLimits.maxPrio; 3810 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3811 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3812 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3813 myMin = fxLimits.minPrio; 3814 myMax = fxLimits.maxPrio; 3815 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3816 } else { 3817 // No clue - punt 3818 if (ThreadPriorityVerbose) 3819 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3820 return EINVAL; // no clue, punt 3821 } 3822 3823 if (ThreadPriorityVerbose) { 3824 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3825 } 3826 3827 priocntl_enable = true; // Enable changing priorities 3828 return 0; 3829} 3830 3831#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3832#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3833#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3834#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3835 3836 3837// scale_to_lwp_priority 3838// 3839// Convert from the libthread "thr_setprio" scale to our current 3840// lwp scheduling class scale. 3841// 3842static 3843int scale_to_lwp_priority (int rMin, int rMax, int x) 3844{ 3845 int v; 3846 3847 if (x == 127) return rMax; // avoid round-down 3848 v = (((x*(rMax-rMin)))/128)+rMin; 3849 return v; 3850} 3851 3852 3853// set_lwp_class_and_priority 3854// 3855// Set the class and priority of the lwp. This call should only 3856// be made when using bound threads (T2 threads are bound by default). 3857// 3858int set_lwp_class_and_priority(int ThreadID, int lwpid, 3859 int newPrio, int new_class, bool scale) { 3860 int rslt; 3861 int Actual, Expected, prv; 3862 pcparms_t ParmInfo; // for GET-SET 3863#ifdef ASSERT 3864 pcparms_t ReadBack; // for readback 3865#endif 3866 3867 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3868 // Query current values. 3869 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3870 // Cache "pcparms_t" in global ParmCache. 3871 // TODO: elide set-to-same-value 3872 3873 // If something went wrong on init, don't change priorities. 3874 if ( !priocntl_enable ) { 3875 if (ThreadPriorityVerbose) 3876 tty->print_cr("Trying to set priority but init failed, ignoring"); 3877 return EINVAL; 3878 } 3879 3880 // If lwp hasn't started yet, just return 3881 // the _start routine will call us again. 3882 if ( lwpid <= 0 ) { 3883 if (ThreadPriorityVerbose) { 3884 tty->print_cr ("deferring the set_lwp_class_and_priority of thread " 3885 INTPTR_FORMAT " to %d, lwpid not set", 3886 ThreadID, newPrio); 3887 } 3888 return 0; 3889 } 3890 3891 if (ThreadPriorityVerbose) { 3892 tty->print_cr ("set_lwp_class_and_priority(" 3893 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3894 ThreadID, lwpid, newPrio); 3895 } 3896 3897 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3898 ParmInfo.pc_cid = PC_CLNULL; 3899 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3900 if (rslt < 0) return errno; 3901 3902 int cur_class = ParmInfo.pc_cid; 3903 ParmInfo.pc_cid = (id_t)new_class; 3904 3905 if (new_class == rtLimits.schedPolicy) { 3906 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3907 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3908 rtLimits.maxPrio, newPrio) 3909 : newPrio; 3910 rtInfo->rt_tqsecs = RT_NOCHANGE; 3911 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3912 if (ThreadPriorityVerbose) { 3913 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3914 } 3915 } else if (new_class == iaLimits.schedPolicy) { 3916 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3917 int maxClamped = MIN2(iaLimits.maxPrio, 3918 cur_class == new_class 3919 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3920 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3921 maxClamped, newPrio) 3922 : newPrio; 3923 iaInfo->ia_uprilim = cur_class == new_class 3924 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3925 iaInfo->ia_mode = IA_NOCHANGE; 3926 if (ThreadPriorityVerbose) { 3927 tty->print_cr("IA: [%d...%d] %d->%d\n", 3928 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3929 } 3930 } else if (new_class == tsLimits.schedPolicy) { 3931 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3932 int maxClamped = MIN2(tsLimits.maxPrio, 3933 cur_class == new_class 3934 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3935 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3936 maxClamped, newPrio) 3937 : newPrio; 3938 tsInfo->ts_uprilim = cur_class == new_class 3939 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3940 if (ThreadPriorityVerbose) { 3941 tty->print_cr("TS: [%d...%d] %d->%d\n", 3942 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3943 } 3944 } else if (new_class == fxLimits.schedPolicy) { 3945 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3946 int maxClamped = MIN2(fxLimits.maxPrio, 3947 cur_class == new_class 3948 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3949 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3950 maxClamped, newPrio) 3951 : newPrio; 3952 fxInfo->fx_uprilim = cur_class == new_class 3953 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3954 fxInfo->fx_tqsecs = FX_NOCHANGE; 3955 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3956 if (ThreadPriorityVerbose) { 3957 tty->print_cr("FX: [%d...%d] %d->%d\n", 3958 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3959 } 3960 } else { 3961 if (ThreadPriorityVerbose) { 3962 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3963 } 3964 return EINVAL; // no clue, punt 3965 } 3966 3967 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3968 if (ThreadPriorityVerbose && rslt) { 3969 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3970 } 3971 if (rslt < 0) return errno; 3972 3973#ifdef ASSERT 3974 // Sanity check: read back what we just attempted to set. 3975 // In theory it could have changed in the interim ... 3976 // 3977 // The priocntl system call is tricky. 3978 // Sometimes it'll validate the priority value argument and 3979 // return EINVAL if unhappy. At other times it fails silently. 3980 // Readbacks are prudent. 3981 3982 if (!ReadBackValidate) return 0; 3983 3984 memset(&ReadBack, 0, sizeof(pcparms_t)); 3985 ReadBack.pc_cid = PC_CLNULL; 3986 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3987 assert(rslt >= 0, "priocntl failed"); 3988 Actual = Expected = 0xBAD; 3989 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3990 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3991 Actual = RTPRI(ReadBack)->rt_pri; 3992 Expected = RTPRI(ParmInfo)->rt_pri; 3993 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3994 Actual = IAPRI(ReadBack)->ia_upri; 3995 Expected = IAPRI(ParmInfo)->ia_upri; 3996 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3997 Actual = TSPRI(ReadBack)->ts_upri; 3998 Expected = TSPRI(ParmInfo)->ts_upri; 3999 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 4000 Actual = FXPRI(ReadBack)->fx_upri; 4001 Expected = FXPRI(ParmInfo)->fx_upri; 4002 } else { 4003 if (ThreadPriorityVerbose) { 4004 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 4005 ParmInfo.pc_cid); 4006 } 4007 } 4008 4009 if (Actual != Expected) { 4010 if (ThreadPriorityVerbose) { 4011 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4012 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4013 } 4014 } 4015#endif 4016 4017 return 0; 4018} 4019 4020// Solaris only gives access to 128 real priorities at a time, 4021// so we expand Java's ten to fill this range. This would be better 4022// if we dynamically adjusted relative priorities. 4023// 4024// The ThreadPriorityPolicy option allows us to select 2 different 4025// priority scales. 4026// 4027// ThreadPriorityPolicy=0 4028// Since the Solaris' default priority is MaximumPriority, we do not 4029// set a priority lower than Max unless a priority lower than 4030// NormPriority is requested. 4031// 4032// ThreadPriorityPolicy=1 4033// This mode causes the priority table to get filled with 4034// linear values. NormPriority get's mapped to 50% of the 4035// Maximum priority an so on. This will cause VM threads 4036// to get unfair treatment against other Solaris processes 4037// which do not explicitly alter their thread priorities. 4038// 4039 4040int os::java_to_os_priority[CriticalPriority + 1] = { 4041 -99999, // 0 Entry should never be used 4042 4043 0, // 1 MinPriority 4044 32, // 2 4045 64, // 3 4046 4047 96, // 4 4048 127, // 5 NormPriority 4049 127, // 6 4050 4051 127, // 7 4052 127, // 8 4053 127, // 9 NearMaxPriority 4054 4055 127, // 10 MaxPriority 4056 4057 -criticalPrio // 11 CriticalPriority 4058}; 4059 4060OSReturn os::set_native_priority(Thread* thread, int newpri) { 4061 OSThread* osthread = thread->osthread(); 4062 4063 // Save requested priority in case the thread hasn't been started 4064 osthread->set_native_priority(newpri); 4065 4066 // Check for critical priority request 4067 bool fxcritical = false; 4068 if (newpri == -criticalPrio) { 4069 fxcritical = true; 4070 newpri = criticalPrio; 4071 } 4072 4073 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4074 if (!UseThreadPriorities) return OS_OK; 4075 4076 int status = 0; 4077 4078 if (!fxcritical) { 4079 // Use thr_setprio only if we have a priority that thr_setprio understands 4080 status = thr_setprio(thread->osthread()->thread_id(), newpri); 4081 } 4082 4083 if (os::Solaris::T2_libthread() || 4084 (UseBoundThreads && osthread->is_vm_created())) { 4085 int lwp_status = 4086 set_lwp_class_and_priority(osthread->thread_id(), 4087 osthread->lwp_id(), 4088 newpri, 4089 fxcritical ? fxLimits.schedPolicy : myClass, 4090 !fxcritical); 4091 if (lwp_status != 0 && fxcritical) { 4092 // Try again, this time without changing the scheduling class 4093 newpri = java_MaxPriority_to_os_priority; 4094 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 4095 osthread->lwp_id(), 4096 newpri, myClass, false); 4097 } 4098 status |= lwp_status; 4099 } 4100 return (status == 0) ? OS_OK : OS_ERR; 4101} 4102 4103 4104OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4105 int p; 4106 if ( !UseThreadPriorities ) { 4107 *priority_ptr = NormalPriority; 4108 return OS_OK; 4109 } 4110 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4111 if (status != 0) { 4112 return OS_ERR; 4113 } 4114 *priority_ptr = p; 4115 return OS_OK; 4116} 4117 4118 4119// Hint to the underlying OS that a task switch would not be good. 4120// Void return because it's a hint and can fail. 4121void os::hint_no_preempt() { 4122 schedctl_start(schedctl_init()); 4123} 4124 4125static void resume_clear_context(OSThread *osthread) { 4126 osthread->set_ucontext(NULL); 4127} 4128 4129static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 4130 osthread->set_ucontext(context); 4131} 4132 4133static Semaphore sr_semaphore; 4134 4135void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 4136 // Save and restore errno to avoid confusing native code with EINTR 4137 // after sigsuspend. 4138 int old_errno = errno; 4139 4140 OSThread* osthread = thread->osthread(); 4141 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 4142 4143 os::SuspendResume::State current = osthread->sr.state(); 4144 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 4145 suspend_save_context(osthread, uc); 4146 4147 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 4148 os::SuspendResume::State state = osthread->sr.suspended(); 4149 if (state == os::SuspendResume::SR_SUSPENDED) { 4150 sigset_t suspend_set; // signals for sigsuspend() 4151 4152 // get current set of blocked signals and unblock resume signal 4153 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 4154 sigdelset(&suspend_set, os::Solaris::SIGasync()); 4155 4156 sr_semaphore.signal(); 4157 // wait here until we are resumed 4158 while (1) { 4159 sigsuspend(&suspend_set); 4160 4161 os::SuspendResume::State result = osthread->sr.running(); 4162 if (result == os::SuspendResume::SR_RUNNING) { 4163 sr_semaphore.signal(); 4164 break; 4165 } 4166 } 4167 4168 } else if (state == os::SuspendResume::SR_RUNNING) { 4169 // request was cancelled, continue 4170 } else { 4171 ShouldNotReachHere(); 4172 } 4173 4174 resume_clear_context(osthread); 4175 } else if (current == os::SuspendResume::SR_RUNNING) { 4176 // request was cancelled, continue 4177 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 4178 // ignore 4179 } else { 4180 // ignore 4181 } 4182 4183 errno = old_errno; 4184} 4185 4186 4187void os::interrupt(Thread* thread) { 4188 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4189 4190 OSThread* osthread = thread->osthread(); 4191 4192 int isInterrupted = osthread->interrupted(); 4193 if (!isInterrupted) { 4194 osthread->set_interrupted(true); 4195 OrderAccess::fence(); 4196 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4197 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4198 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4199 ParkEvent * const slp = thread->_SleepEvent ; 4200 if (slp != NULL) slp->unpark() ; 4201 } 4202 4203 // For JSR166: unpark after setting status but before thr_kill -dl 4204 if (thread->is_Java_thread()) { 4205 ((JavaThread*)thread)->parker()->unpark(); 4206 } 4207 4208 // Handle interruptible wait() ... 4209 ParkEvent * const ev = thread->_ParkEvent ; 4210 if (ev != NULL) ev->unpark() ; 4211 4212 // When events are used everywhere for os::sleep, then this thr_kill 4213 // will only be needed if UseVMInterruptibleIO is true. 4214 4215 if (!isInterrupted) { 4216 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4217 assert_status(status == 0, status, "thr_kill"); 4218 4219 // Bump thread interruption counter 4220 RuntimeService::record_thread_interrupt_signaled_count(); 4221 } 4222} 4223 4224 4225bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4226 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4227 4228 OSThread* osthread = thread->osthread(); 4229 4230 bool res = osthread->interrupted(); 4231 4232 // NOTE that since there is no "lock" around these two operations, 4233 // there is the possibility that the interrupted flag will be 4234 // "false" but that the interrupt event will be set. This is 4235 // intentional. The effect of this is that Object.wait() will appear 4236 // to have a spurious wakeup, which is not harmful, and the 4237 // possibility is so rare that it is not worth the added complexity 4238 // to add yet another lock. It has also been recommended not to put 4239 // the interrupted flag into the os::Solaris::Event structure, 4240 // because it hides the issue. 4241 if (res && clear_interrupted) { 4242 osthread->set_interrupted(false); 4243 } 4244 return res; 4245} 4246 4247 4248void os::print_statistics() { 4249} 4250 4251int os::message_box(const char* title, const char* message) { 4252 int i; 4253 fdStream err(defaultStream::error_fd()); 4254 for (i = 0; i < 78; i++) err.print_raw("="); 4255 err.cr(); 4256 err.print_raw_cr(title); 4257 for (i = 0; i < 78; i++) err.print_raw("-"); 4258 err.cr(); 4259 err.print_raw_cr(message); 4260 for (i = 0; i < 78; i++) err.print_raw("="); 4261 err.cr(); 4262 4263 char buf[16]; 4264 // Prevent process from exiting upon "read error" without consuming all CPU 4265 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4266 4267 return buf[0] == 'y' || buf[0] == 'Y'; 4268} 4269 4270static int sr_notify(OSThread* osthread) { 4271 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 4272 assert_status(status == 0, status, "thr_kill"); 4273 return status; 4274} 4275 4276// "Randomly" selected value for how long we want to spin 4277// before bailing out on suspending a thread, also how often 4278// we send a signal to a thread we want to resume 4279static const int RANDOMLY_LARGE_INTEGER = 1000000; 4280static const int RANDOMLY_LARGE_INTEGER2 = 100; 4281 4282static bool do_suspend(OSThread* osthread) { 4283 assert(osthread->sr.is_running(), "thread should be running"); 4284 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 4285 4286 // mark as suspended and send signal 4287 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 4288 // failed to switch, state wasn't running? 4289 ShouldNotReachHere(); 4290 return false; 4291 } 4292 4293 if (sr_notify(osthread) != 0) { 4294 ShouldNotReachHere(); 4295 } 4296 4297 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 4298 while (true) { 4299 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 4300 break; 4301 } else { 4302 // timeout 4303 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 4304 if (cancelled == os::SuspendResume::SR_RUNNING) { 4305 return false; 4306 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 4307 // make sure that we consume the signal on the semaphore as well 4308 sr_semaphore.wait(); 4309 break; 4310 } else { 4311 ShouldNotReachHere(); 4312 return false; 4313 } 4314 } 4315 } 4316 4317 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 4318 return true; 4319} 4320 4321static void do_resume(OSThread* osthread) { 4322 assert(osthread->sr.is_suspended(), "thread should be suspended"); 4323 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 4324 4325 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 4326 // failed to switch to WAKEUP_REQUEST 4327 ShouldNotReachHere(); 4328 return; 4329 } 4330 4331 while (true) { 4332 if (sr_notify(osthread) == 0) { 4333 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 4334 if (osthread->sr.is_running()) { 4335 return; 4336 } 4337 } 4338 } else { 4339 ShouldNotReachHere(); 4340 } 4341 } 4342 4343 guarantee(osthread->sr.is_running(), "Must be running!"); 4344} 4345 4346void os::SuspendedThreadTask::internal_do_task() { 4347 if (do_suspend(_thread->osthread())) { 4348 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 4349 do_task(context); 4350 do_resume(_thread->osthread()); 4351 } 4352} 4353 4354class PcFetcher : public os::SuspendedThreadTask { 4355public: 4356 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 4357 ExtendedPC result(); 4358protected: 4359 void do_task(const os::SuspendedThreadTaskContext& context); 4360private: 4361 ExtendedPC _epc; 4362}; 4363 4364ExtendedPC PcFetcher::result() { 4365 guarantee(is_done(), "task is not done yet."); 4366 return _epc; 4367} 4368 4369void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 4370 Thread* thread = context.thread(); 4371 OSThread* osthread = thread->osthread(); 4372 if (osthread->ucontext() != NULL) { 4373 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 4374 } else { 4375 // NULL context is unexpected, double-check this is the VMThread 4376 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 4377 } 4378} 4379 4380// A lightweight implementation that does not suspend the target thread and 4381// thus returns only a hint. Used for profiling only! 4382ExtendedPC os::get_thread_pc(Thread* thread) { 4383 // Make sure that it is called by the watcher and the Threads lock is owned. 4384 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4385 // For now, is only used to profile the VM Thread 4386 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4387 PcFetcher fetcher(thread); 4388 fetcher.run(); 4389 return fetcher.result(); 4390} 4391 4392 4393// This does not do anything on Solaris. This is basically a hook for being 4394// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4395void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4396 f(value, method, args, thread); 4397} 4398 4399// This routine may be used by user applications as a "hook" to catch signals. 4400// The user-defined signal handler must pass unrecognized signals to this 4401// routine, and if it returns true (non-zero), then the signal handler must 4402// return immediately. If the flag "abort_if_unrecognized" is true, then this 4403// routine will never retun false (zero), but instead will execute a VM panic 4404// routine kill the process. 4405// 4406// If this routine returns false, it is OK to call it again. This allows 4407// the user-defined signal handler to perform checks either before or after 4408// the VM performs its own checks. Naturally, the user code would be making 4409// a serious error if it tried to handle an exception (such as a null check 4410// or breakpoint) that the VM was generating for its own correct operation. 4411// 4412// This routine may recognize any of the following kinds of signals: 4413// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4414// os::Solaris::SIGasync 4415// It should be consulted by handlers for any of those signals. 4416// It explicitly does not recognize os::Solaris::SIGinterrupt 4417// 4418// The caller of this routine must pass in the three arguments supplied 4419// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4420// field of the structure passed to sigaction(). This routine assumes that 4421// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4422// 4423// Note that the VM will print warnings if it detects conflicting signal 4424// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4425// 4426extern "C" JNIEXPORT int 4427JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 4428 int abort_if_unrecognized); 4429 4430 4431void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4432 int orig_errno = errno; // Preserve errno value over signal handler. 4433 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4434 errno = orig_errno; 4435} 4436 4437/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4438 is needed to provoke threads blocked on IO to return an EINTR 4439 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4440 does NOT participate in signal chaining due to requirement for 4441 NOT setting SA_RESTART to make EINTR work. */ 4442extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4443 if (UseSignalChaining) { 4444 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4445 if (actp && actp->sa_handler) { 4446 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4447 } 4448 } 4449} 4450 4451// This boolean allows users to forward their own non-matching signals 4452// to JVM_handle_solaris_signal, harmlessly. 4453bool os::Solaris::signal_handlers_are_installed = false; 4454 4455// For signal-chaining 4456bool os::Solaris::libjsig_is_loaded = false; 4457typedef struct sigaction *(*get_signal_t)(int); 4458get_signal_t os::Solaris::get_signal_action = NULL; 4459 4460struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4461 struct sigaction *actp = NULL; 4462 4463 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4464 // Retrieve the old signal handler from libjsig 4465 actp = (*get_signal_action)(sig); 4466 } 4467 if (actp == NULL) { 4468 // Retrieve the preinstalled signal handler from jvm 4469 actp = get_preinstalled_handler(sig); 4470 } 4471 4472 return actp; 4473} 4474 4475static bool call_chained_handler(struct sigaction *actp, int sig, 4476 siginfo_t *siginfo, void *context) { 4477 // Call the old signal handler 4478 if (actp->sa_handler == SIG_DFL) { 4479 // It's more reasonable to let jvm treat it as an unexpected exception 4480 // instead of taking the default action. 4481 return false; 4482 } else if (actp->sa_handler != SIG_IGN) { 4483 if ((actp->sa_flags & SA_NODEFER) == 0) { 4484 // automaticlly block the signal 4485 sigaddset(&(actp->sa_mask), sig); 4486 } 4487 4488 sa_handler_t hand; 4489 sa_sigaction_t sa; 4490 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4491 // retrieve the chained handler 4492 if (siginfo_flag_set) { 4493 sa = actp->sa_sigaction; 4494 } else { 4495 hand = actp->sa_handler; 4496 } 4497 4498 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4499 actp->sa_handler = SIG_DFL; 4500 } 4501 4502 // try to honor the signal mask 4503 sigset_t oset; 4504 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4505 4506 // call into the chained handler 4507 if (siginfo_flag_set) { 4508 (*sa)(sig, siginfo, context); 4509 } else { 4510 (*hand)(sig); 4511 } 4512 4513 // restore the signal mask 4514 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4515 } 4516 // Tell jvm's signal handler the signal is taken care of. 4517 return true; 4518} 4519 4520bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4521 bool chained = false; 4522 // signal-chaining 4523 if (UseSignalChaining) { 4524 struct sigaction *actp = get_chained_signal_action(sig); 4525 if (actp != NULL) { 4526 chained = call_chained_handler(actp, sig, siginfo, context); 4527 } 4528 } 4529 return chained; 4530} 4531 4532struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4533 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4534 if (preinstalled_sigs[sig] != 0) { 4535 return &chainedsigactions[sig]; 4536 } 4537 return NULL; 4538} 4539 4540void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4541 4542 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4543 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4544 chainedsigactions[sig] = oldAct; 4545 preinstalled_sigs[sig] = 1; 4546} 4547 4548void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4549 // Check for overwrite. 4550 struct sigaction oldAct; 4551 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4552 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4553 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4554 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4555 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4556 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4557 if (AllowUserSignalHandlers || !set_installed) { 4558 // Do not overwrite; user takes responsibility to forward to us. 4559 return; 4560 } else if (UseSignalChaining) { 4561 if (oktochain) { 4562 // save the old handler in jvm 4563 save_preinstalled_handler(sig, oldAct); 4564 } else { 4565 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4566 } 4567 // libjsig also interposes the sigaction() call below and saves the 4568 // old sigaction on it own. 4569 } else { 4570 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4571 "%#lx for signal %d.", (long)oldhand, sig)); 4572 } 4573 } 4574 4575 struct sigaction sigAct; 4576 sigfillset(&(sigAct.sa_mask)); 4577 sigAct.sa_handler = SIG_DFL; 4578 4579 sigAct.sa_sigaction = signalHandler; 4580 // Handle SIGSEGV on alternate signal stack if 4581 // not using stack banging 4582 if (!UseStackBanging && sig == SIGSEGV) { 4583 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4584 // Interruptible i/o requires SA_RESTART cleared so EINTR 4585 // is returned instead of restarting system calls 4586 } else if (sig == os::Solaris::SIGinterrupt()) { 4587 sigemptyset(&sigAct.sa_mask); 4588 sigAct.sa_handler = NULL; 4589 sigAct.sa_flags = SA_SIGINFO; 4590 sigAct.sa_sigaction = sigINTRHandler; 4591 } else { 4592 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4593 } 4594 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4595 4596 sigaction(sig, &sigAct, &oldAct); 4597 4598 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4599 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4600 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4601} 4602 4603 4604#define DO_SIGNAL_CHECK(sig) \ 4605 if (!sigismember(&check_signal_done, sig)) \ 4606 os::Solaris::check_signal_handler(sig) 4607 4608// This method is a periodic task to check for misbehaving JNI applications 4609// under CheckJNI, we can add any periodic checks here 4610 4611void os::run_periodic_checks() { 4612 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4613 // thereby preventing a NULL checks. 4614 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4615 4616 if (check_signals == false) return; 4617 4618 // SEGV and BUS if overridden could potentially prevent 4619 // generation of hs*.log in the event of a crash, debugging 4620 // such a case can be very challenging, so we absolutely 4621 // check for the following for a good measure: 4622 DO_SIGNAL_CHECK(SIGSEGV); 4623 DO_SIGNAL_CHECK(SIGILL); 4624 DO_SIGNAL_CHECK(SIGFPE); 4625 DO_SIGNAL_CHECK(SIGBUS); 4626 DO_SIGNAL_CHECK(SIGPIPE); 4627 DO_SIGNAL_CHECK(SIGXFSZ); 4628 4629 // ReduceSignalUsage allows the user to override these handlers 4630 // see comments at the very top and jvm_solaris.h 4631 if (!ReduceSignalUsage) { 4632 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4633 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4634 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4635 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4636 } 4637 4638 // See comments above for using JVM1/JVM2 and UseAltSigs 4639 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4640 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4641 4642} 4643 4644typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4645 4646static os_sigaction_t os_sigaction = NULL; 4647 4648void os::Solaris::check_signal_handler(int sig) { 4649 char buf[O_BUFLEN]; 4650 address jvmHandler = NULL; 4651 4652 struct sigaction act; 4653 if (os_sigaction == NULL) { 4654 // only trust the default sigaction, in case it has been interposed 4655 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4656 if (os_sigaction == NULL) return; 4657 } 4658 4659 os_sigaction(sig, (struct sigaction*)NULL, &act); 4660 4661 address thisHandler = (act.sa_flags & SA_SIGINFO) 4662 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4663 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4664 4665 4666 switch(sig) { 4667 case SIGSEGV: 4668 case SIGBUS: 4669 case SIGFPE: 4670 case SIGPIPE: 4671 case SIGXFSZ: 4672 case SIGILL: 4673 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4674 break; 4675 4676 case SHUTDOWN1_SIGNAL: 4677 case SHUTDOWN2_SIGNAL: 4678 case SHUTDOWN3_SIGNAL: 4679 case BREAK_SIGNAL: 4680 jvmHandler = (address)user_handler(); 4681 break; 4682 4683 default: 4684 int intrsig = os::Solaris::SIGinterrupt(); 4685 int asynsig = os::Solaris::SIGasync(); 4686 4687 if (sig == intrsig) { 4688 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4689 } else if (sig == asynsig) { 4690 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4691 } else { 4692 return; 4693 } 4694 break; 4695 } 4696 4697 4698 if (thisHandler != jvmHandler) { 4699 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4700 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4701 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4702 // No need to check this sig any longer 4703 sigaddset(&check_signal_done, sig); 4704 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4705 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4706 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4707 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4708 // No need to check this sig any longer 4709 sigaddset(&check_signal_done, sig); 4710 } 4711 4712 // Print all the signal handler state 4713 if (sigismember(&check_signal_done, sig)) { 4714 print_signal_handlers(tty, buf, O_BUFLEN); 4715 } 4716 4717} 4718 4719void os::Solaris::install_signal_handlers() { 4720 bool libjsigdone = false; 4721 signal_handlers_are_installed = true; 4722 4723 // signal-chaining 4724 typedef void (*signal_setting_t)(); 4725 signal_setting_t begin_signal_setting = NULL; 4726 signal_setting_t end_signal_setting = NULL; 4727 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4728 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4729 if (begin_signal_setting != NULL) { 4730 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4731 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4732 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4733 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4734 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4735 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4736 libjsig_is_loaded = true; 4737 if (os::Solaris::get_libjsig_version != NULL) { 4738 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4739 } 4740 assert(UseSignalChaining, "should enable signal-chaining"); 4741 } 4742 if (libjsig_is_loaded) { 4743 // Tell libjsig jvm is setting signal handlers 4744 (*begin_signal_setting)(); 4745 } 4746 4747 set_signal_handler(SIGSEGV, true, true); 4748 set_signal_handler(SIGPIPE, true, true); 4749 set_signal_handler(SIGXFSZ, true, true); 4750 set_signal_handler(SIGBUS, true, true); 4751 set_signal_handler(SIGILL, true, true); 4752 set_signal_handler(SIGFPE, true, true); 4753 4754 4755 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4756 4757 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4758 // can not register overridable signals which might be > 32 4759 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4760 // Tell libjsig jvm has finished setting signal handlers 4761 (*end_signal_setting)(); 4762 libjsigdone = true; 4763 } 4764 } 4765 4766 // Never ok to chain our SIGinterrupt 4767 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4768 set_signal_handler(os::Solaris::SIGasync(), true, true); 4769 4770 if (libjsig_is_loaded && !libjsigdone) { 4771 // Tell libjsig jvm finishes setting signal handlers 4772 (*end_signal_setting)(); 4773 } 4774 4775 // We don't activate signal checker if libjsig is in place, we trust ourselves 4776 // and if UserSignalHandler is installed all bets are off. 4777 // Log that signal checking is off only if -verbose:jni is specified. 4778 if (CheckJNICalls) { 4779 if (libjsig_is_loaded) { 4780 if (PrintJNIResolving) { 4781 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4782 } 4783 check_signals = false; 4784 } 4785 if (AllowUserSignalHandlers) { 4786 if (PrintJNIResolving) { 4787 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4788 } 4789 check_signals = false; 4790 } 4791 } 4792} 4793 4794 4795void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4796 4797const char * signames[] = { 4798 "SIG0", 4799 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4800 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4801 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4802 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4803 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4804 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4805 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4806 "SIGCANCEL", "SIGLOST" 4807}; 4808 4809const char* os::exception_name(int exception_code, char* buf, size_t size) { 4810 if (0 < exception_code && exception_code <= SIGRTMAX) { 4811 // signal 4812 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4813 jio_snprintf(buf, size, "%s", signames[exception_code]); 4814 } else { 4815 jio_snprintf(buf, size, "SIG%d", exception_code); 4816 } 4817 return buf; 4818 } else { 4819 return NULL; 4820 } 4821} 4822 4823// (Static) wrappers for the new libthread API 4824int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4825int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4826int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4827int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4828int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4829 4830// (Static) wrapper for getisax(2) call. 4831os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4832 4833// (Static) wrappers for the liblgrp API 4834os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4835os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4836os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4837os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4838os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4839os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4840os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4841os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4842os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4843 4844// (Static) wrapper for meminfo() call. 4845os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4846 4847static address resolve_symbol_lazy(const char* name) { 4848 address addr = (address) dlsym(RTLD_DEFAULT, name); 4849 if(addr == NULL) { 4850 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4851 addr = (address) dlsym(RTLD_NEXT, name); 4852 } 4853 return addr; 4854} 4855 4856static address resolve_symbol(const char* name) { 4857 address addr = resolve_symbol_lazy(name); 4858 if(addr == NULL) { 4859 fatal(dlerror()); 4860 } 4861 return addr; 4862} 4863 4864 4865 4866// isT2_libthread() 4867// 4868// Routine to determine if we are currently using the new T2 libthread. 4869// 4870// We determine if we are using T2 by reading /proc/self/lstatus and 4871// looking for a thread with the ASLWP bit set. If we find this status 4872// bit set, we must assume that we are NOT using T2. The T2 team 4873// has approved this algorithm. 4874// 4875// We need to determine if we are running with the new T2 libthread 4876// since setting native thread priorities is handled differently 4877// when using this library. All threads created using T2 are bound 4878// threads. Calling thr_setprio is meaningless in this case. 4879// 4880bool isT2_libthread() { 4881 static prheader_t * lwpArray = NULL; 4882 static int lwpSize = 0; 4883 static int lwpFile = -1; 4884 lwpstatus_t * that; 4885 char lwpName [128]; 4886 bool isT2 = false; 4887 4888#define ADR(x) ((uintptr_t)(x)) 4889#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4890 4891 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4892 if (lwpFile < 0) { 4893 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4894 return false; 4895 } 4896 lwpSize = 16*1024; 4897 for (;;) { 4898 ::lseek64 (lwpFile, 0, SEEK_SET); 4899 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal); 4900 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4901 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4902 break; 4903 } 4904 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4905 // We got a good snapshot - now iterate over the list. 4906 int aslwpcount = 0; 4907 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4908 that = LWPINDEX(lwpArray,i); 4909 if (that->pr_flags & PR_ASLWP) { 4910 aslwpcount++; 4911 } 4912 } 4913 if (aslwpcount == 0) isT2 = true; 4914 break; 4915 } 4916 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4917 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry. 4918 } 4919 4920 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); 4921 ::close (lwpFile); 4922 if (ThreadPriorityVerbose) { 4923 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4924 else tty->print_cr("We are not running with a T2 libthread\n"); 4925 } 4926 return isT2; 4927} 4928 4929 4930void os::Solaris::libthread_init() { 4931 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4932 4933 // Determine if we are running with the new T2 libthread 4934 os::Solaris::set_T2_libthread(isT2_libthread()); 4935 4936 lwp_priocntl_init(); 4937 4938 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4939 if(func == NULL) { 4940 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4941 // Guarantee that this VM is running on an new enough OS (5.6 or 4942 // later) that it will have a new enough libthread.so. 4943 guarantee(func != NULL, "libthread.so is too old."); 4944 } 4945 4946 // Initialize the new libthread getstate API wrappers 4947 func = resolve_symbol("thr_getstate"); 4948 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4949 4950 func = resolve_symbol("thr_setstate"); 4951 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4952 4953 func = resolve_symbol("thr_setmutator"); 4954 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4955 4956 func = resolve_symbol("thr_suspend_mutator"); 4957 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4958 4959 func = resolve_symbol("thr_continue_mutator"); 4960 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4961 4962 int size; 4963 void (*handler_info_func)(address *, int *); 4964 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4965 handler_info_func(&handler_start, &size); 4966 handler_end = handler_start + size; 4967} 4968 4969 4970int_fnP_mutex_tP os::Solaris::_mutex_lock; 4971int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4972int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4973int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4974int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4975int os::Solaris::_mutex_scope = USYNC_THREAD; 4976 4977int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4978int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4979int_fnP_cond_tP os::Solaris::_cond_signal; 4980int_fnP_cond_tP os::Solaris::_cond_broadcast; 4981int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4982int_fnP_cond_tP os::Solaris::_cond_destroy; 4983int os::Solaris::_cond_scope = USYNC_THREAD; 4984 4985void os::Solaris::synchronization_init() { 4986 if(UseLWPSynchronization) { 4987 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4988 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4989 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4990 os::Solaris::set_mutex_init(lwp_mutex_init); 4991 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4992 os::Solaris::set_mutex_scope(USYNC_THREAD); 4993 4994 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4995 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4996 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4997 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4998 os::Solaris::set_cond_init(lwp_cond_init); 4999 os::Solaris::set_cond_destroy(lwp_cond_destroy); 5000 os::Solaris::set_cond_scope(USYNC_THREAD); 5001 } 5002 else { 5003 os::Solaris::set_mutex_scope(USYNC_THREAD); 5004 os::Solaris::set_cond_scope(USYNC_THREAD); 5005 5006 if(UsePthreads) { 5007 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 5008 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 5009 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 5010 os::Solaris::set_mutex_init(pthread_mutex_default_init); 5011 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 5012 5013 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 5014 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 5015 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 5016 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 5017 os::Solaris::set_cond_init(pthread_cond_default_init); 5018 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 5019 } 5020 else { 5021 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 5022 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 5023 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 5024 os::Solaris::set_mutex_init(::mutex_init); 5025 os::Solaris::set_mutex_destroy(::mutex_destroy); 5026 5027 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 5028 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 5029 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 5030 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 5031 os::Solaris::set_cond_init(::cond_init); 5032 os::Solaris::set_cond_destroy(::cond_destroy); 5033 } 5034 } 5035} 5036 5037bool os::Solaris::liblgrp_init() { 5038 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 5039 if (handle != NULL) { 5040 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 5041 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 5042 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 5043 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 5044 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 5045 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 5046 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 5047 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 5048 dlsym(handle, "lgrp_cookie_stale"))); 5049 5050 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 5051 set_lgrp_cookie(c); 5052 return true; 5053 } 5054 return false; 5055} 5056 5057void os::Solaris::misc_sym_init() { 5058 address func; 5059 5060 // getisax 5061 func = resolve_symbol_lazy("getisax"); 5062 if (func != NULL) { 5063 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 5064 } 5065 5066 // meminfo 5067 func = resolve_symbol_lazy("meminfo"); 5068 if (func != NULL) { 5069 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 5070 } 5071} 5072 5073uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 5074 assert(_getisax != NULL, "_getisax not set"); 5075 return _getisax(array, n); 5076} 5077 5078// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 5079typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 5080static pset_getloadavg_type pset_getloadavg_ptr = NULL; 5081 5082void init_pset_getloadavg_ptr(void) { 5083 pset_getloadavg_ptr = 5084 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 5085 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 5086 warning("pset_getloadavg function not found"); 5087 } 5088} 5089 5090int os::Solaris::_dev_zero_fd = -1; 5091 5092// this is called _before_ the global arguments have been parsed 5093void os::init(void) { 5094 _initial_pid = getpid(); 5095 5096 max_hrtime = first_hrtime = gethrtime(); 5097 5098 init_random(1234567); 5099 5100 page_size = sysconf(_SC_PAGESIZE); 5101 if (page_size == -1) 5102 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 5103 strerror(errno))); 5104 init_page_sizes((size_t) page_size); 5105 5106 Solaris::initialize_system_info(); 5107 5108 // Initialize misc. symbols as soon as possible, so we can use them 5109 // if we need them. 5110 Solaris::misc_sym_init(); 5111 5112 int fd = ::open("/dev/zero", O_RDWR); 5113 if (fd < 0) { 5114 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 5115 } else { 5116 Solaris::set_dev_zero_fd(fd); 5117 5118 // Close on exec, child won't inherit. 5119 fcntl(fd, F_SETFD, FD_CLOEXEC); 5120 } 5121 5122 clock_tics_per_sec = CLK_TCK; 5123 5124 // check if dladdr1() exists; dladdr1 can provide more information than 5125 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 5126 // and is available on linker patches for 5.7 and 5.8. 5127 // libdl.so must have been loaded, this call is just an entry lookup 5128 void * hdl = dlopen("libdl.so", RTLD_NOW); 5129 if (hdl) 5130 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 5131 5132 // (Solaris only) this switches to calls that actually do locking. 5133 ThreadCritical::initialize(); 5134 5135 main_thread = thr_self(); 5136 5137 // Constant minimum stack size allowed. It must be at least 5138 // the minimum of what the OS supports (thr_min_stack()), and 5139 // enough to allow the thread to get to user bytecode execution. 5140 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 5141 // If the pagesize of the VM is greater than 8K determine the appropriate 5142 // number of initial guard pages. The user can change this with the 5143 // command line arguments, if needed. 5144 if (vm_page_size() > 8*K) { 5145 StackYellowPages = 1; 5146 StackRedPages = 1; 5147 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 5148 } 5149} 5150 5151// To install functions for atexit system call 5152extern "C" { 5153 static void perfMemory_exit_helper() { 5154 perfMemory_exit(); 5155 } 5156} 5157 5158// this is called _after_ the global arguments have been parsed 5159jint os::init_2(void) { 5160 // try to enable extended file IO ASAP, see 6431278 5161 os::Solaris::try_enable_extended_io(); 5162 5163 // Allocate a single page and mark it as readable for safepoint polling. Also 5164 // use this first mmap call to check support for MAP_ALIGN. 5165 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 5166 page_size, 5167 MAP_PRIVATE | MAP_ALIGN, 5168 PROT_READ); 5169 if (polling_page == NULL) { 5170 has_map_align = false; 5171 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 5172 PROT_READ); 5173 } 5174 5175 os::set_polling_page(polling_page); 5176 5177#ifndef PRODUCT 5178 if( Verbose && PrintMiscellaneous ) 5179 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 5180#endif 5181 5182 if (!UseMembar) { 5183 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 5184 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 5185 os::set_memory_serialize_page( mem_serialize_page ); 5186 5187#ifndef PRODUCT 5188 if(Verbose && PrintMiscellaneous) 5189 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 5190#endif 5191 } 5192 5193 // Check minimum allowable stack size for thread creation and to initialize 5194 // the java system classes, including StackOverflowError - depends on page 5195 // size. Add a page for compiler2 recursion in main thread. 5196 // Add in 2*BytesPerWord times page size to account for VM stack during 5197 // class initialization depending on 32 or 64 bit VM. 5198 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 5199 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5200 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5201 5202 size_t threadStackSizeInBytes = ThreadStackSize * K; 5203 if (threadStackSizeInBytes != 0 && 5204 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5205 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5206 os::Solaris::min_stack_allowed/K); 5207 return JNI_ERR; 5208 } 5209 5210 // For 64kbps there will be a 64kb page size, which makes 5211 // the usable default stack size quite a bit less. Increase the 5212 // stack for 64kb (or any > than 8kb) pages, this increases 5213 // virtual memory fragmentation (since we're not creating the 5214 // stack on a power of 2 boundary. The real fix for this 5215 // should be to fix the guard page mechanism. 5216 5217 if (vm_page_size() > 8*K) { 5218 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5219 ? threadStackSizeInBytes + 5220 ((StackYellowPages + StackRedPages) * vm_page_size()) 5221 : 0; 5222 ThreadStackSize = threadStackSizeInBytes/K; 5223 } 5224 5225 // Make the stack size a multiple of the page size so that 5226 // the yellow/red zones can be guarded. 5227 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5228 vm_page_size())); 5229 5230 Solaris::libthread_init(); 5231 5232 if (UseNUMA) { 5233 if (!Solaris::liblgrp_init()) { 5234 UseNUMA = false; 5235 } else { 5236 size_t lgrp_limit = os::numa_get_groups_num(); 5237 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 5238 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5239 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 5240 if (lgrp_num < 2) { 5241 // There's only one locality group, disable NUMA. 5242 UseNUMA = false; 5243 } 5244 } 5245 if (!UseNUMA && ForceNUMA) { 5246 UseNUMA = true; 5247 } 5248 } 5249 5250 Solaris::signal_sets_init(); 5251 Solaris::init_signal_mem(); 5252 Solaris::install_signal_handlers(); 5253 5254 if (libjsigversion < JSIG_VERSION_1_4_1) { 5255 Maxlibjsigsigs = OLDMAXSIGNUM; 5256 } 5257 5258 // initialize synchronization primitives to use either thread or 5259 // lwp synchronization (controlled by UseLWPSynchronization) 5260 Solaris::synchronization_init(); 5261 5262 if (MaxFDLimit) { 5263 // set the number of file descriptors to max. print out error 5264 // if getrlimit/setrlimit fails but continue regardless. 5265 struct rlimit nbr_files; 5266 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5267 if (status != 0) { 5268 if (PrintMiscellaneous && (Verbose || WizardMode)) 5269 perror("os::init_2 getrlimit failed"); 5270 } else { 5271 nbr_files.rlim_cur = nbr_files.rlim_max; 5272 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5273 if (status != 0) { 5274 if (PrintMiscellaneous && (Verbose || WizardMode)) 5275 perror("os::init_2 setrlimit failed"); 5276 } 5277 } 5278 } 5279 5280 // Calculate theoretical max. size of Threads to guard gainst 5281 // artifical out-of-memory situations, where all available address- 5282 // space has been reserved by thread stacks. Default stack size is 1Mb. 5283 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5284 JavaThread::stack_size_at_create() : (1*K*K); 5285 assert(pre_thread_stack_size != 0, "Must have a stack"); 5286 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5287 // we should start doing Virtual Memory banging. Currently when the threads will 5288 // have used all but 200Mb of space. 5289 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5290 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5291 5292 // at-exit methods are called in the reverse order of their registration. 5293 // In Solaris 7 and earlier, atexit functions are called on return from 5294 // main or as a result of a call to exit(3C). There can be only 32 of 5295 // these functions registered and atexit() does not set errno. In Solaris 5296 // 8 and later, there is no limit to the number of functions registered 5297 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5298 // functions are called upon dlclose(3DL) in addition to return from main 5299 // and exit(3C). 5300 5301 if (PerfAllowAtExitRegistration) { 5302 // only register atexit functions if PerfAllowAtExitRegistration is set. 5303 // atexit functions can be delayed until process exit time, which 5304 // can be problematic for embedded VM situations. Embedded VMs should 5305 // call DestroyJavaVM() to assure that VM resources are released. 5306 5307 // note: perfMemory_exit_helper atexit function may be removed in 5308 // the future if the appropriate cleanup code can be added to the 5309 // VM_Exit VMOperation's doit method. 5310 if (atexit(perfMemory_exit_helper) != 0) { 5311 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5312 } 5313 } 5314 5315 // Init pset_loadavg function pointer 5316 init_pset_getloadavg_ptr(); 5317 5318 return JNI_OK; 5319} 5320 5321void os::init_3(void) { 5322 return; 5323} 5324 5325// Mark the polling page as unreadable 5326void os::make_polling_page_unreadable(void) { 5327 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5328 fatal("Could not disable polling page"); 5329}; 5330 5331// Mark the polling page as readable 5332void os::make_polling_page_readable(void) { 5333 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5334 fatal("Could not enable polling page"); 5335}; 5336 5337// OS interface. 5338 5339bool os::check_heap(bool force) { return true; } 5340 5341typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5342static vsnprintf_t sol_vsnprintf = NULL; 5343 5344int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5345 if (!sol_vsnprintf) { 5346 //search for the named symbol in the objects that were loaded after libjvm 5347 void* where = RTLD_NEXT; 5348 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5349 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5350 if (!sol_vsnprintf){ 5351 //search for the named symbol in the objects that were loaded before libjvm 5352 where = RTLD_DEFAULT; 5353 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5354 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5355 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5356 } 5357 } 5358 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5359} 5360 5361 5362// Is a (classpath) directory empty? 5363bool os::dir_is_empty(const char* path) { 5364 DIR *dir = NULL; 5365 struct dirent *ptr; 5366 5367 dir = opendir(path); 5368 if (dir == NULL) return true; 5369 5370 /* Scan the directory */ 5371 bool result = true; 5372 char buf[sizeof(struct dirent) + MAX_PATH]; 5373 struct dirent *dbuf = (struct dirent *) buf; 5374 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5375 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5376 result = false; 5377 } 5378 } 5379 closedir(dir); 5380 return result; 5381} 5382 5383// This code originates from JDK's sysOpen and open64_w 5384// from src/solaris/hpi/src/system_md.c 5385 5386#ifndef O_DELETE 5387#define O_DELETE 0x10000 5388#endif 5389 5390// Open a file. Unlink the file immediately after open returns 5391// if the specified oflag has the O_DELETE flag set. 5392// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5393 5394int os::open(const char *path, int oflag, int mode) { 5395 if (strlen(path) > MAX_PATH - 1) { 5396 errno = ENAMETOOLONG; 5397 return -1; 5398 } 5399 int fd; 5400 int o_delete = (oflag & O_DELETE); 5401 oflag = oflag & ~O_DELETE; 5402 5403 fd = ::open64(path, oflag, mode); 5404 if (fd == -1) return -1; 5405 5406 //If the open succeeded, the file might still be a directory 5407 { 5408 struct stat64 buf64; 5409 int ret = ::fstat64(fd, &buf64); 5410 int st_mode = buf64.st_mode; 5411 5412 if (ret != -1) { 5413 if ((st_mode & S_IFMT) == S_IFDIR) { 5414 errno = EISDIR; 5415 ::close(fd); 5416 return -1; 5417 } 5418 } else { 5419 ::close(fd); 5420 return -1; 5421 } 5422 } 5423 /* 5424 * 32-bit Solaris systems suffer from: 5425 * 5426 * - an historical default soft limit of 256 per-process file 5427 * descriptors that is too low for many Java programs. 5428 * 5429 * - a design flaw where file descriptors created using stdio 5430 * fopen must be less than 256, _even_ when the first limit above 5431 * has been raised. This can cause calls to fopen (but not calls to 5432 * open, for example) to fail mysteriously, perhaps in 3rd party 5433 * native code (although the JDK itself uses fopen). One can hardly 5434 * criticize them for using this most standard of all functions. 5435 * 5436 * We attempt to make everything work anyways by: 5437 * 5438 * - raising the soft limit on per-process file descriptors beyond 5439 * 256 5440 * 5441 * - As of Solaris 10u4, we can request that Solaris raise the 256 5442 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5443 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5444 * 5445 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5446 * workaround the bug by remapping non-stdio file descriptors below 5447 * 256 to ones beyond 256, which is done below. 5448 * 5449 * See: 5450 * 1085341: 32-bit stdio routines should support file descriptors >255 5451 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5452 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5453 * enable_extended_FILE_stdio() in VM initialisation 5454 * Giri Mandalika's blog 5455 * http://technopark02.blogspot.com/2005_05_01_archive.html 5456 */ 5457#ifndef _LP64 5458 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5459 int newfd = ::fcntl(fd, F_DUPFD, 256); 5460 if (newfd != -1) { 5461 ::close(fd); 5462 fd = newfd; 5463 } 5464 } 5465#endif // 32-bit Solaris 5466 /* 5467 * All file descriptors that are opened in the JVM and not 5468 * specifically destined for a subprocess should have the 5469 * close-on-exec flag set. If we don't set it, then careless 3rd 5470 * party native code might fork and exec without closing all 5471 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5472 * UNIXProcess.c), and this in turn might: 5473 * 5474 * - cause end-of-file to fail to be detected on some file 5475 * descriptors, resulting in mysterious hangs, or 5476 * 5477 * - might cause an fopen in the subprocess to fail on a system 5478 * suffering from bug 1085341. 5479 * 5480 * (Yes, the default setting of the close-on-exec flag is a Unix 5481 * design flaw) 5482 * 5483 * See: 5484 * 1085341: 32-bit stdio routines should support file descriptors >255 5485 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5486 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5487 */ 5488#ifdef FD_CLOEXEC 5489 { 5490 int flags = ::fcntl(fd, F_GETFD); 5491 if (flags != -1) 5492 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5493 } 5494#endif 5495 5496 if (o_delete != 0) { 5497 ::unlink(path); 5498 } 5499 return fd; 5500} 5501 5502// create binary file, rewriting existing file if required 5503int os::create_binary_file(const char* path, bool rewrite_existing) { 5504 int oflags = O_WRONLY | O_CREAT; 5505 if (!rewrite_existing) { 5506 oflags |= O_EXCL; 5507 } 5508 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5509} 5510 5511// return current position of file pointer 5512jlong os::current_file_offset(int fd) { 5513 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5514} 5515 5516// move file pointer to the specified offset 5517jlong os::seek_to_file_offset(int fd, jlong offset) { 5518 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5519} 5520 5521jlong os::lseek(int fd, jlong offset, int whence) { 5522 return (jlong) ::lseek64(fd, offset, whence); 5523} 5524 5525char * os::native_path(char *path) { 5526 return path; 5527} 5528 5529int os::ftruncate(int fd, jlong length) { 5530 return ::ftruncate64(fd, length); 5531} 5532 5533int os::fsync(int fd) { 5534 RESTARTABLE_RETURN_INT(::fsync(fd)); 5535} 5536 5537int os::available(int fd, jlong *bytes) { 5538 jlong cur, end; 5539 int mode; 5540 struct stat64 buf64; 5541 5542 if (::fstat64(fd, &buf64) >= 0) { 5543 mode = buf64.st_mode; 5544 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5545 /* 5546 * XXX: is the following call interruptible? If so, this might 5547 * need to go through the INTERRUPT_IO() wrapper as for other 5548 * blocking, interruptible calls in this file. 5549 */ 5550 int n,ioctl_return; 5551 5552 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5553 if (ioctl_return>= 0) { 5554 *bytes = n; 5555 return 1; 5556 } 5557 } 5558 } 5559 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5560 return 0; 5561 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5562 return 0; 5563 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5564 return 0; 5565 } 5566 *bytes = end - cur; 5567 return 1; 5568} 5569 5570// Map a block of memory. 5571char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 5572 char *addr, size_t bytes, bool read_only, 5573 bool allow_exec) { 5574 int prot; 5575 int flags; 5576 5577 if (read_only) { 5578 prot = PROT_READ; 5579 flags = MAP_SHARED; 5580 } else { 5581 prot = PROT_READ | PROT_WRITE; 5582 flags = MAP_PRIVATE; 5583 } 5584 5585 if (allow_exec) { 5586 prot |= PROT_EXEC; 5587 } 5588 5589 if (addr != NULL) { 5590 flags |= MAP_FIXED; 5591 } 5592 5593 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5594 fd, file_offset); 5595 if (mapped_address == MAP_FAILED) { 5596 return NULL; 5597 } 5598 return mapped_address; 5599} 5600 5601 5602// Remap a block of memory. 5603char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5604 char *addr, size_t bytes, bool read_only, 5605 bool allow_exec) { 5606 // same as map_memory() on this OS 5607 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5608 allow_exec); 5609} 5610 5611 5612// Unmap a block of memory. 5613bool os::pd_unmap_memory(char* addr, size_t bytes) { 5614 return munmap(addr, bytes) == 0; 5615} 5616 5617void os::pause() { 5618 char filename[MAX_PATH]; 5619 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5620 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5621 } else { 5622 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5623 } 5624 5625 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5626 if (fd != -1) { 5627 struct stat buf; 5628 ::close(fd); 5629 while (::stat(filename, &buf) == 0) { 5630 (void)::poll(NULL, 0, 100); 5631 } 5632 } else { 5633 jio_fprintf(stderr, 5634 "Could not open pause file '%s', continuing immediately.\n", filename); 5635 } 5636} 5637 5638#ifndef PRODUCT 5639#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5640// Turn this on if you need to trace synch operations. 5641// Set RECORD_SYNCH_LIMIT to a large-enough value, 5642// and call record_synch_enable and record_synch_disable 5643// around the computation of interest. 5644 5645void record_synch(char* name, bool returning); // defined below 5646 5647class RecordSynch { 5648 char* _name; 5649 public: 5650 RecordSynch(char* name) :_name(name) 5651 { record_synch(_name, false); } 5652 ~RecordSynch() { record_synch(_name, true); } 5653}; 5654 5655#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5656extern "C" ret name params { \ 5657 typedef ret name##_t params; \ 5658 static name##_t* implem = NULL; \ 5659 static int callcount = 0; \ 5660 if (implem == NULL) { \ 5661 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5662 if (implem == NULL) fatal(dlerror()); \ 5663 } \ 5664 ++callcount; \ 5665 RecordSynch _rs(#name); \ 5666 inner; \ 5667 return implem args; \ 5668} 5669// in dbx, examine callcounts this way: 5670// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5671 5672#define CHECK_POINTER_OK(p) \ 5673 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5674#define CHECK_MU \ 5675 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5676#define CHECK_CV \ 5677 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5678#define CHECK_P(p) \ 5679 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5680 5681#define CHECK_MUTEX(mutex_op) \ 5682CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5683 5684CHECK_MUTEX( mutex_lock) 5685CHECK_MUTEX( _mutex_lock) 5686CHECK_MUTEX( mutex_unlock) 5687CHECK_MUTEX(_mutex_unlock) 5688CHECK_MUTEX( mutex_trylock) 5689CHECK_MUTEX(_mutex_trylock) 5690 5691#define CHECK_COND(cond_op) \ 5692CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5693 5694CHECK_COND( cond_wait); 5695CHECK_COND(_cond_wait); 5696CHECK_COND(_cond_wait_cancel); 5697 5698#define CHECK_COND2(cond_op) \ 5699CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5700 5701CHECK_COND2( cond_timedwait); 5702CHECK_COND2(_cond_timedwait); 5703CHECK_COND2(_cond_timedwait_cancel); 5704 5705// do the _lwp_* versions too 5706#define mutex_t lwp_mutex_t 5707#define cond_t lwp_cond_t 5708CHECK_MUTEX( _lwp_mutex_lock) 5709CHECK_MUTEX( _lwp_mutex_unlock) 5710CHECK_MUTEX( _lwp_mutex_trylock) 5711CHECK_MUTEX( __lwp_mutex_lock) 5712CHECK_MUTEX( __lwp_mutex_unlock) 5713CHECK_MUTEX( __lwp_mutex_trylock) 5714CHECK_MUTEX(___lwp_mutex_lock) 5715CHECK_MUTEX(___lwp_mutex_unlock) 5716 5717CHECK_COND( _lwp_cond_wait); 5718CHECK_COND( __lwp_cond_wait); 5719CHECK_COND(___lwp_cond_wait); 5720 5721CHECK_COND2( _lwp_cond_timedwait); 5722CHECK_COND2( __lwp_cond_timedwait); 5723#undef mutex_t 5724#undef cond_t 5725 5726CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5727CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5728CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5729CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5730CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5731CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5732CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5733CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5734 5735 5736// recording machinery: 5737 5738enum { RECORD_SYNCH_LIMIT = 200 }; 5739char* record_synch_name[RECORD_SYNCH_LIMIT]; 5740void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5741bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5742thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5743int record_synch_count = 0; 5744bool record_synch_enabled = false; 5745 5746// in dbx, examine recorded data this way: 5747// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5748 5749void record_synch(char* name, bool returning) { 5750 if (record_synch_enabled) { 5751 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5752 record_synch_name[record_synch_count] = name; 5753 record_synch_returning[record_synch_count] = returning; 5754 record_synch_thread[record_synch_count] = thr_self(); 5755 record_synch_arg0ptr[record_synch_count] = &name; 5756 record_synch_count++; 5757 } 5758 // put more checking code here: 5759 // ... 5760 } 5761} 5762 5763void record_synch_enable() { 5764 // start collecting trace data, if not already doing so 5765 if (!record_synch_enabled) record_synch_count = 0; 5766 record_synch_enabled = true; 5767} 5768 5769void record_synch_disable() { 5770 // stop collecting trace data 5771 record_synch_enabled = false; 5772} 5773 5774#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5775#endif // PRODUCT 5776 5777const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5778const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5779 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5780 5781 5782// JVMTI & JVM monitoring and management support 5783// The thread_cpu_time() and current_thread_cpu_time() are only 5784// supported if is_thread_cpu_time_supported() returns true. 5785// They are not supported on Solaris T1. 5786 5787// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5788// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5789// of a thread. 5790// 5791// current_thread_cpu_time() and thread_cpu_time(Thread *) 5792// returns the fast estimate available on the platform. 5793 5794// hrtime_t gethrvtime() return value includes 5795// user time but does not include system time 5796jlong os::current_thread_cpu_time() { 5797 return (jlong) gethrvtime(); 5798} 5799 5800jlong os::thread_cpu_time(Thread *thread) { 5801 // return user level CPU time only to be consistent with 5802 // what current_thread_cpu_time returns. 5803 // thread_cpu_time_info() must be changed if this changes 5804 return os::thread_cpu_time(thread, false /* user time only */); 5805} 5806 5807jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5808 if (user_sys_cpu_time) { 5809 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5810 } else { 5811 return os::current_thread_cpu_time(); 5812 } 5813} 5814 5815jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5816 char proc_name[64]; 5817 int count; 5818 prusage_t prusage; 5819 jlong lwp_time; 5820 int fd; 5821 5822 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5823 getpid(), 5824 thread->osthread()->lwp_id()); 5825 fd = ::open(proc_name, O_RDONLY); 5826 if ( fd == -1 ) return -1; 5827 5828 do { 5829 count = ::pread(fd, 5830 (void *)&prusage.pr_utime, 5831 thr_time_size, 5832 thr_time_off); 5833 } while (count < 0 && errno == EINTR); 5834 ::close(fd); 5835 if ( count < 0 ) return -1; 5836 5837 if (user_sys_cpu_time) { 5838 // user + system CPU time 5839 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5840 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5841 (jlong)prusage.pr_stime.tv_nsec + 5842 (jlong)prusage.pr_utime.tv_nsec; 5843 } else { 5844 // user level CPU time only 5845 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5846 (jlong)prusage.pr_utime.tv_nsec; 5847 } 5848 5849 return(lwp_time); 5850} 5851 5852void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5853 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5854 info_ptr->may_skip_backward = false; // elapsed time not wall time 5855 info_ptr->may_skip_forward = false; // elapsed time not wall time 5856 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5857} 5858 5859void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5860 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5861 info_ptr->may_skip_backward = false; // elapsed time not wall time 5862 info_ptr->may_skip_forward = false; // elapsed time not wall time 5863 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5864} 5865 5866bool os::is_thread_cpu_time_supported() { 5867 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5868 return true; 5869 } else { 5870 return false; 5871 } 5872} 5873 5874// System loadavg support. Returns -1 if load average cannot be obtained. 5875// Return the load average for our processor set if the primitive exists 5876// (Solaris 9 and later). Otherwise just return system wide loadavg. 5877int os::loadavg(double loadavg[], int nelem) { 5878 if (pset_getloadavg_ptr != NULL) { 5879 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5880 } else { 5881 return ::getloadavg(loadavg, nelem); 5882 } 5883} 5884 5885//--------------------------------------------------------------------------------- 5886 5887bool os::find(address addr, outputStream* st) { 5888 Dl_info dlinfo; 5889 memset(&dlinfo, 0, sizeof(dlinfo)); 5890 if (dladdr(addr, &dlinfo) != 0) { 5891 st->print(PTR_FORMAT ": ", addr); 5892 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5893 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5894 } else if (dlinfo.dli_fbase != NULL) 5895 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5896 else 5897 st->print("<absolute address>"); 5898 if (dlinfo.dli_fname != NULL) { 5899 st->print(" in %s", dlinfo.dli_fname); 5900 } 5901 if (dlinfo.dli_fbase != NULL) { 5902 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5903 } 5904 st->cr(); 5905 5906 if (Verbose) { 5907 // decode some bytes around the PC 5908 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5909 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5910 address lowest = (address) dlinfo.dli_sname; 5911 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5912 if (begin < lowest) begin = lowest; 5913 Dl_info dlinfo2; 5914 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5915 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5916 end = (address) dlinfo2.dli_saddr; 5917 Disassembler::decode(begin, end, st); 5918 } 5919 return true; 5920 } 5921 return false; 5922} 5923 5924// Following function has been added to support HotSparc's libjvm.so running 5925// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5926// src/solaris/hpi/native_threads in the EVM codebase. 5927// 5928// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5929// libraries and should thus be removed. We will leave it behind for a while 5930// until we no longer want to able to run on top of 1.3.0 Solaris production 5931// JDK. See 4341971. 5932 5933#define STACK_SLACK 0x800 5934 5935extern "C" { 5936 intptr_t sysThreadAvailableStackWithSlack() { 5937 stack_t st; 5938 intptr_t retval, stack_top; 5939 retval = thr_stksegment(&st); 5940 assert(retval == 0, "incorrect return value from thr_stksegment"); 5941 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5942 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5943 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5944 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5945 } 5946} 5947 5948// ObjectMonitor park-unpark infrastructure ... 5949// 5950// We implement Solaris and Linux PlatformEvents with the 5951// obvious condvar-mutex-flag triple. 5952// Another alternative that works quite well is pipes: 5953// Each PlatformEvent consists of a pipe-pair. 5954// The thread associated with the PlatformEvent 5955// calls park(), which reads from the input end of the pipe. 5956// Unpark() writes into the other end of the pipe. 5957// The write-side of the pipe must be set NDELAY. 5958// Unfortunately pipes consume a large # of handles. 5959// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5960// Using pipes for the 1st few threads might be workable, however. 5961// 5962// park() is permitted to return spuriously. 5963// Callers of park() should wrap the call to park() in 5964// an appropriate loop. A litmus test for the correct 5965// usage of park is the following: if park() were modified 5966// to immediately return 0 your code should still work, 5967// albeit degenerating to a spin loop. 5968// 5969// An interesting optimization for park() is to use a trylock() 5970// to attempt to acquire the mutex. If the trylock() fails 5971// then we know that a concurrent unpark() operation is in-progress. 5972// in that case the park() code could simply set _count to 0 5973// and return immediately. The subsequent park() operation *might* 5974// return immediately. That's harmless as the caller of park() is 5975// expected to loop. By using trylock() we will have avoided a 5976// avoided a context switch caused by contention on the per-thread mutex. 5977// 5978// TODO-FIXME: 5979// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5980// objectmonitor implementation. 5981// 2. Collapse the JSR166 parker event, and the 5982// objectmonitor ParkEvent into a single "Event" construct. 5983// 3. In park() and unpark() add: 5984// assert (Thread::current() == AssociatedWith). 5985// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5986// 1-out-of-N park() operations will return immediately. 5987// 5988// _Event transitions in park() 5989// -1 => -1 : illegal 5990// 1 => 0 : pass - return immediately 5991// 0 => -1 : block 5992// 5993// _Event serves as a restricted-range semaphore. 5994// 5995// Another possible encoding of _Event would be with 5996// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5997// 5998// TODO-FIXME: add DTRACE probes for: 5999// 1. Tx parks 6000// 2. Ty unparks Tx 6001// 3. Tx resumes from park 6002 6003 6004// value determined through experimentation 6005#define ROUNDINGFIX 11 6006 6007// utility to compute the abstime argument to timedwait. 6008// TODO-FIXME: switch from compute_abstime() to unpackTime(). 6009 6010static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 6011 // millis is the relative timeout time 6012 // abstime will be the absolute timeout time 6013 if (millis < 0) millis = 0; 6014 struct timeval now; 6015 int status = gettimeofday(&now, NULL); 6016 assert(status == 0, "gettimeofday"); 6017 jlong seconds = millis / 1000; 6018 jlong max_wait_period; 6019 6020 if (UseLWPSynchronization) { 6021 // forward port of fix for 4275818 (not sleeping long enough) 6022 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 6023 // _lwp_cond_timedwait() used a round_down algorithm rather 6024 // than a round_up. For millis less than our roundfactor 6025 // it rounded down to 0 which doesn't meet the spec. 6026 // For millis > roundfactor we may return a bit sooner, but 6027 // since we can not accurately identify the patch level and 6028 // this has already been fixed in Solaris 9 and 8 we will 6029 // leave it alone rather than always rounding down. 6030 6031 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 6032 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 6033 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 6034 max_wait_period = 21000000; 6035 } else { 6036 max_wait_period = 50000000; 6037 } 6038 millis %= 1000; 6039 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 6040 seconds = max_wait_period; 6041 } 6042 abstime->tv_sec = now.tv_sec + seconds; 6043 long usec = now.tv_usec + millis * 1000; 6044 if (usec >= 1000000) { 6045 abstime->tv_sec += 1; 6046 usec -= 1000000; 6047 } 6048 abstime->tv_nsec = usec * 1000; 6049 return abstime; 6050} 6051 6052// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 6053// Conceptually TryPark() should be equivalent to park(0). 6054 6055int os::PlatformEvent::TryPark() { 6056 for (;;) { 6057 const int v = _Event ; 6058 guarantee ((v == 0) || (v == 1), "invariant") ; 6059 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 6060 } 6061} 6062 6063void os::PlatformEvent::park() { // AKA: down() 6064 // Invariant: Only the thread associated with the Event/PlatformEvent 6065 // may call park(). 6066 int v ; 6067 for (;;) { 6068 v = _Event ; 6069 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6070 } 6071 guarantee (v >= 0, "invariant") ; 6072 if (v == 0) { 6073 // Do this the hard way by blocking ... 6074 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6075 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6076 // Only for SPARC >= V8PlusA 6077#if defined(__sparc) && defined(COMPILER2) 6078 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6079#endif 6080 int status = os::Solaris::mutex_lock(_mutex); 6081 assert_status(status == 0, status, "mutex_lock"); 6082 guarantee (_nParked == 0, "invariant") ; 6083 ++ _nParked ; 6084 while (_Event < 0) { 6085 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 6086 // Treat this the same as if the wait was interrupted 6087 // With usr/lib/lwp going to kernel, always handle ETIME 6088 status = os::Solaris::cond_wait(_cond, _mutex); 6089 if (status == ETIME) status = EINTR ; 6090 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 6091 } 6092 -- _nParked ; 6093 _Event = 0 ; 6094 status = os::Solaris::mutex_unlock(_mutex); 6095 assert_status(status == 0, status, "mutex_unlock"); 6096 // Paranoia to ensure our locked and lock-free paths interact 6097 // correctly with each other. 6098 OrderAccess::fence(); 6099 } 6100} 6101 6102int os::PlatformEvent::park(jlong millis) { 6103 guarantee (_nParked == 0, "invariant") ; 6104 int v ; 6105 for (;;) { 6106 v = _Event ; 6107 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6108 } 6109 guarantee (v >= 0, "invariant") ; 6110 if (v != 0) return OS_OK ; 6111 6112 int ret = OS_TIMEOUT; 6113 timestruc_t abst; 6114 compute_abstime (&abst, millis); 6115 6116 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6117 // For Solaris SPARC set fprs.FEF=0 prior to parking. 6118 // Only for SPARC >= V8PlusA 6119#if defined(__sparc) && defined(COMPILER2) 6120 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6121#endif 6122 int status = os::Solaris::mutex_lock(_mutex); 6123 assert_status(status == 0, status, "mutex_lock"); 6124 guarantee (_nParked == 0, "invariant") ; 6125 ++ _nParked ; 6126 while (_Event < 0) { 6127 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 6128 assert_status(status == 0 || status == EINTR || 6129 status == ETIME || status == ETIMEDOUT, 6130 status, "cond_timedwait"); 6131 if (!FilterSpuriousWakeups) break ; // previous semantics 6132 if (status == ETIME || status == ETIMEDOUT) break ; 6133 // We consume and ignore EINTR and spurious wakeups. 6134 } 6135 -- _nParked ; 6136 if (_Event >= 0) ret = OS_OK ; 6137 _Event = 0 ; 6138 status = os::Solaris::mutex_unlock(_mutex); 6139 assert_status(status == 0, status, "mutex_unlock"); 6140 // Paranoia to ensure our locked and lock-free paths interact 6141 // correctly with each other. 6142 OrderAccess::fence(); 6143 return ret; 6144} 6145 6146void os::PlatformEvent::unpark() { 6147 // Transitions for _Event: 6148 // 0 :=> 1 6149 // 1 :=> 1 6150 // -1 :=> either 0 or 1; must signal target thread 6151 // That is, we can safely transition _Event from -1 to either 6152 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 6153 // unpark() calls. 6154 // See also: "Semaphores in Plan 9" by Mullender & Cox 6155 // 6156 // Note: Forcing a transition from "-1" to "1" on an unpark() means 6157 // that it will take two back-to-back park() calls for the owning 6158 // thread to block. This has the benefit of forcing a spurious return 6159 // from the first park() call after an unpark() call which will help 6160 // shake out uses of park() and unpark() without condition variables. 6161 6162 if (Atomic::xchg(1, &_Event) >= 0) return; 6163 6164 // If the thread associated with the event was parked, wake it. 6165 // Wait for the thread assoc with the PlatformEvent to vacate. 6166 int status = os::Solaris::mutex_lock(_mutex); 6167 assert_status(status == 0, status, "mutex_lock"); 6168 int AnyWaiters = _nParked; 6169 status = os::Solaris::mutex_unlock(_mutex); 6170 assert_status(status == 0, status, "mutex_unlock"); 6171 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 6172 if (AnyWaiters != 0) { 6173 // We intentional signal *after* dropping the lock 6174 // to avoid a common class of futile wakeups. 6175 status = os::Solaris::cond_signal(_cond); 6176 assert_status(status == 0, status, "cond_signal"); 6177 } 6178} 6179 6180// JSR166 6181// ------------------------------------------------------- 6182 6183/* 6184 * The solaris and linux implementations of park/unpark are fairly 6185 * conservative for now, but can be improved. They currently use a 6186 * mutex/condvar pair, plus _counter. 6187 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6188 * sets count to 1 and signals condvar. Only one thread ever waits 6189 * on the condvar. Contention seen when trying to park implies that someone 6190 * is unparking you, so don't wait. And spurious returns are fine, so there 6191 * is no need to track notifications. 6192 */ 6193 6194#define MAX_SECS 100000000 6195/* 6196 * This code is common to linux and solaris and will be moved to a 6197 * common place in dolphin. 6198 * 6199 * The passed in time value is either a relative time in nanoseconds 6200 * or an absolute time in milliseconds. Either way it has to be unpacked 6201 * into suitable seconds and nanoseconds components and stored in the 6202 * given timespec structure. 6203 * Given time is a 64-bit value and the time_t used in the timespec is only 6204 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6205 * overflow if times way in the future are given. Further on Solaris versions 6206 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6207 * number of seconds, in abstime, is less than current_time + 100,000,000. 6208 * As it will be 28 years before "now + 100000000" will overflow we can 6209 * ignore overflow and just impose a hard-limit on seconds using the value 6210 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6211 * years from "now". 6212 */ 6213static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6214 assert (time > 0, "convertTime"); 6215 6216 struct timeval now; 6217 int status = gettimeofday(&now, NULL); 6218 assert(status == 0, "gettimeofday"); 6219 6220 time_t max_secs = now.tv_sec + MAX_SECS; 6221 6222 if (isAbsolute) { 6223 jlong secs = time / 1000; 6224 if (secs > max_secs) { 6225 absTime->tv_sec = max_secs; 6226 } 6227 else { 6228 absTime->tv_sec = secs; 6229 } 6230 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6231 } 6232 else { 6233 jlong secs = time / NANOSECS_PER_SEC; 6234 if (secs >= MAX_SECS) { 6235 absTime->tv_sec = max_secs; 6236 absTime->tv_nsec = 0; 6237 } 6238 else { 6239 absTime->tv_sec = now.tv_sec + secs; 6240 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6241 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6242 absTime->tv_nsec -= NANOSECS_PER_SEC; 6243 ++absTime->tv_sec; // note: this must be <= max_secs 6244 } 6245 } 6246 } 6247 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6248 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6249 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6250 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6251} 6252 6253void Parker::park(bool isAbsolute, jlong time) { 6254 // Ideally we'd do something useful while spinning, such 6255 // as calling unpackTime(). 6256 6257 // Optional fast-path check: 6258 // Return immediately if a permit is available. 6259 // We depend on Atomic::xchg() having full barrier semantics 6260 // since we are doing a lock-free update to _counter. 6261 if (Atomic::xchg(0, &_counter) > 0) return; 6262 6263 // Optional fast-exit: Check interrupt before trying to wait 6264 Thread* thread = Thread::current(); 6265 assert(thread->is_Java_thread(), "Must be JavaThread"); 6266 JavaThread *jt = (JavaThread *)thread; 6267 if (Thread::is_interrupted(thread, false)) { 6268 return; 6269 } 6270 6271 // First, demultiplex/decode time arguments 6272 timespec absTime; 6273 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6274 return; 6275 } 6276 if (time > 0) { 6277 // Warning: this code might be exposed to the old Solaris time 6278 // round-down bugs. Grep "roundingFix" for details. 6279 unpackTime(&absTime, isAbsolute, time); 6280 } 6281 6282 // Enter safepoint region 6283 // Beware of deadlocks such as 6317397. 6284 // The per-thread Parker:: _mutex is a classic leaf-lock. 6285 // In particular a thread must never block on the Threads_lock while 6286 // holding the Parker:: mutex. If safepoints are pending both the 6287 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6288 ThreadBlockInVM tbivm(jt); 6289 6290 // Don't wait if cannot get lock since interference arises from 6291 // unblocking. Also. check interrupt before trying wait 6292 if (Thread::is_interrupted(thread, false) || 6293 os::Solaris::mutex_trylock(_mutex) != 0) { 6294 return; 6295 } 6296 6297 int status ; 6298 6299 if (_counter > 0) { // no wait needed 6300 _counter = 0; 6301 status = os::Solaris::mutex_unlock(_mutex); 6302 assert (status == 0, "invariant") ; 6303 // Paranoia to ensure our locked and lock-free paths interact 6304 // correctly with each other and Java-level accesses. 6305 OrderAccess::fence(); 6306 return; 6307 } 6308 6309#ifdef ASSERT 6310 // Don't catch signals while blocked; let the running threads have the signals. 6311 // (This allows a debugger to break into the running thread.) 6312 sigset_t oldsigs; 6313 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6314 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6315#endif 6316 6317 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6318 jt->set_suspend_equivalent(); 6319 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6320 6321 // Do this the hard way by blocking ... 6322 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6323 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6324 // Only for SPARC >= V8PlusA 6325#if defined(__sparc) && defined(COMPILER2) 6326 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6327#endif 6328 6329 if (time == 0) { 6330 status = os::Solaris::cond_wait (_cond, _mutex) ; 6331 } else { 6332 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6333 } 6334 // Note that an untimed cond_wait() can sometimes return ETIME on older 6335 // versions of the Solaris. 6336 assert_status(status == 0 || status == EINTR || 6337 status == ETIME || status == ETIMEDOUT, 6338 status, "cond_timedwait"); 6339 6340#ifdef ASSERT 6341 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6342#endif 6343 _counter = 0 ; 6344 status = os::Solaris::mutex_unlock(_mutex); 6345 assert_status(status == 0, status, "mutex_unlock") ; 6346 // Paranoia to ensure our locked and lock-free paths interact 6347 // correctly with each other and Java-level accesses. 6348 OrderAccess::fence(); 6349 6350 // If externally suspended while waiting, re-suspend 6351 if (jt->handle_special_suspend_equivalent_condition()) { 6352 jt->java_suspend_self(); 6353 } 6354} 6355 6356void Parker::unpark() { 6357 int s, status ; 6358 status = os::Solaris::mutex_lock (_mutex) ; 6359 assert (status == 0, "invariant") ; 6360 s = _counter; 6361 _counter = 1; 6362 status = os::Solaris::mutex_unlock (_mutex) ; 6363 assert (status == 0, "invariant") ; 6364 6365 if (s < 1) { 6366 status = os::Solaris::cond_signal (_cond) ; 6367 assert (status == 0, "invariant") ; 6368 } 6369} 6370 6371extern char** environ; 6372 6373// Run the specified command in a separate process. Return its exit value, 6374// or -1 on failure (e.g. can't fork a new process). 6375// Unlike system(), this function can be called from signal handler. It 6376// doesn't block SIGINT et al. 6377int os::fork_and_exec(char* cmd) { 6378 char * argv[4]; 6379 argv[0] = (char *)"sh"; 6380 argv[1] = (char *)"-c"; 6381 argv[2] = cmd; 6382 argv[3] = NULL; 6383 6384 // fork is async-safe, fork1 is not so can't use in signal handler 6385 pid_t pid; 6386 Thread* t = ThreadLocalStorage::get_thread_slow(); 6387 if (t != NULL && t->is_inside_signal_handler()) { 6388 pid = fork(); 6389 } else { 6390 pid = fork1(); 6391 } 6392 6393 if (pid < 0) { 6394 // fork failed 6395 warning("fork failed: %s", strerror(errno)); 6396 return -1; 6397 6398 } else if (pid == 0) { 6399 // child process 6400 6401 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6402 execve("/usr/bin/sh", argv, environ); 6403 6404 // execve failed 6405 _exit(-1); 6406 6407 } else { 6408 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6409 // care about the actual exit code, for now. 6410 6411 int status; 6412 6413 // Wait for the child process to exit. This returns immediately if 6414 // the child has already exited. */ 6415 while (waitpid(pid, &status, 0) < 0) { 6416 switch (errno) { 6417 case ECHILD: return 0; 6418 case EINTR: break; 6419 default: return -1; 6420 } 6421 } 6422 6423 if (WIFEXITED(status)) { 6424 // The child exited normally; get its exit code. 6425 return WEXITSTATUS(status); 6426 } else if (WIFSIGNALED(status)) { 6427 // The child exited because of a signal 6428 // The best value to return is 0x80 + signal number, 6429 // because that is what all Unix shells do, and because 6430 // it allows callers to distinguish between process exit and 6431 // process death by signal. 6432 return 0x80 + WTERMSIG(status); 6433 } else { 6434 // Unknown exit code; pass it through 6435 return status; 6436 } 6437 } 6438} 6439 6440// is_headless_jre() 6441// 6442// Test for the existence of xawt/libmawt.so or libawt_xawt.so 6443// in order to report if we are running in a headless jre 6444// 6445// Since JDK8 xawt/libmawt.so was moved into the same directory 6446// as libawt.so, and renamed libawt_xawt.so 6447// 6448bool os::is_headless_jre() { 6449 struct stat statbuf; 6450 char buf[MAXPATHLEN]; 6451 char libmawtpath[MAXPATHLEN]; 6452 const char *xawtstr = "/xawt/libmawt.so"; 6453 const char *new_xawtstr = "/libawt_xawt.so"; 6454 char *p; 6455 6456 // Get path to libjvm.so 6457 os::jvm_path(buf, sizeof(buf)); 6458 6459 // Get rid of libjvm.so 6460 p = strrchr(buf, '/'); 6461 if (p == NULL) return false; 6462 else *p = '\0'; 6463 6464 // Get rid of client or server 6465 p = strrchr(buf, '/'); 6466 if (p == NULL) return false; 6467 else *p = '\0'; 6468 6469 // check xawt/libmawt.so 6470 strcpy(libmawtpath, buf); 6471 strcat(libmawtpath, xawtstr); 6472 if (::stat(libmawtpath, &statbuf) == 0) return false; 6473 6474 // check libawt_xawt.so 6475 strcpy(libmawtpath, buf); 6476 strcat(libmawtpath, new_xawtstr); 6477 if (::stat(libmawtpath, &statbuf) == 0) return false; 6478 6479 return true; 6480} 6481 6482size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6483 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6484} 6485 6486int os::close(int fd) { 6487 return ::close(fd); 6488} 6489 6490int os::socket_close(int fd) { 6491 return ::close(fd); 6492} 6493 6494int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 6495 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6496} 6497 6498int os::send(int fd, char* buf, size_t nBytes, uint flags) { 6499 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6500} 6501 6502int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 6503 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 6504} 6505 6506// As both poll and select can be interrupted by signals, we have to be 6507// prepared to restart the system call after updating the timeout, unless 6508// a poll() is done with timeout == -1, in which case we repeat with this 6509// "wait forever" value. 6510 6511int os::timeout(int fd, long timeout) { 6512 int res; 6513 struct timeval t; 6514 julong prevtime, newtime; 6515 static const char* aNull = 0; 6516 struct pollfd pfd; 6517 pfd.fd = fd; 6518 pfd.events = POLLIN; 6519 6520 gettimeofday(&t, &aNull); 6521 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6522 6523 for(;;) { 6524 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6525 if(res == OS_ERR && errno == EINTR) { 6526 if(timeout != -1) { 6527 gettimeofday(&t, &aNull); 6528 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6529 timeout -= newtime - prevtime; 6530 if(timeout <= 0) 6531 return OS_OK; 6532 prevtime = newtime; 6533 } 6534 } else return res; 6535 } 6536} 6537 6538int os::connect(int fd, struct sockaddr *him, socklen_t len) { 6539 int _result; 6540 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\ 6541 os::Solaris::clear_interrupted); 6542 6543 // Depending on when thread interruption is reset, _result could be 6544 // one of two values when errno == EINTR 6545 6546 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6547 && (errno == EINTR)) { 6548 /* restarting a connect() changes its errno semantics */ 6549 INTERRUPTIBLE(::connect(fd, him, len), _result,\ 6550 os::Solaris::clear_interrupted); 6551 /* undo these changes */ 6552 if (_result == OS_ERR) { 6553 if (errno == EALREADY) { 6554 errno = EINPROGRESS; /* fall through */ 6555 } else if (errno == EISCONN) { 6556 errno = 0; 6557 return OS_OK; 6558 } 6559 } 6560 } 6561 return _result; 6562 } 6563 6564int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 6565 if (fd < 0) { 6566 return OS_ERR; 6567 } 6568 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\ 6569 os::Solaris::clear_interrupted); 6570} 6571 6572int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 6573 sockaddr* from, socklen_t* fromlen) { 6574 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\ 6575 os::Solaris::clear_interrupted); 6576} 6577 6578int os::sendto(int fd, char* buf, size_t len, uint flags, 6579 struct sockaddr* to, socklen_t tolen) { 6580 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\ 6581 os::Solaris::clear_interrupted); 6582} 6583 6584int os::socket_available(int fd, jint *pbytes) { 6585 if (fd < 0) { 6586 return OS_OK; 6587 } 6588 int ret; 6589 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6590 // note: ioctl can return 0 when successful, JVM_SocketAvailable 6591 // is expected to return 0 on failure and 1 on success to the jdk. 6592 return (ret == OS_ERR) ? 0 : 1; 6593} 6594 6595int os::bind(int fd, struct sockaddr* him, socklen_t len) { 6596 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6597 os::Solaris::clear_interrupted); 6598} 6599 6600// Get the default path to the core file 6601// Returns the length of the string 6602int os::get_core_path(char* buffer, size_t bufferSize) { 6603 const char* p = get_current_directory(buffer, bufferSize); 6604 6605 if (p == NULL) { 6606 assert(p != NULL, "failed to get current directory"); 6607 return 0; 6608 } 6609 6610 return strlen(buffer); 6611} 6612 6613#ifndef PRODUCT 6614void TestReserveMemorySpecial_test() { 6615 // No tests available for this platform 6616} 6617#endif 6618