os_solaris.cpp revision 4453:17bf4d428955
138094Speter/* 250479Speter * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 31553Srgrimes * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4156813Sru * 5156813Sru * This code is free software; you can redistribute it and/or modify it 664567Sgshapiro * under the terms of the GNU General Public License version 2 only, as 764567Sgshapiro * published by the Free Software Foundation. 880029Sobrien * 91553Srgrimes * This code is distributed in the hope that it will be useful, but WITHOUT 1067083Sgshapiro * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1155236Speter * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1238094Speter * version 2 for more details (a copy is included in the LICENSE file that 1380029Sobrien * accompanied this code). 14149174Sgshapiro * 15149174Sgshapiro * You should have received a copy of the GNU General Public License version 1690799Sgshapiro * 2 along with this work; if not, write to the Free Software Foundation, 1780029Sobrien * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 1880029Sobrien * 19132947Sgshapiro * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20132947Sgshapiro * or visit www.oracle.com if you need additional information or have any 21132947Sgshapiro * questions. 2283445Sru * 2390799Sgshapiro */ 2490799Sgshapiro 2580029Sobrien// no precompiled headers 2690799Sgshapiro#include "classfile/classLoader.hpp" 2790799Sgshapiro#include "classfile/systemDictionary.hpp" 2890799Sgshapiro#include "classfile/vmSymbols.hpp" 2912571Speter#include "code/icBuffer.hpp" 3038094Speter#include "code/vtableStubs.hpp" 3138094Speter#include "compiler/compileBroker.hpp" 3238094Speter#include "compiler/disassembler.hpp" 33156813Sru#include "interpreter/interpreter.hpp" 3438094Speter#include "jvm_solaris.h" 35137675Sbz#include "memory/allocation.inline.hpp" 3638094Speter#include "memory/filemap.hpp" 3790799Sgshapiro#include "mutex_solaris.inline.hpp" 381553Srgrimes#include "oops/oop.inline.hpp" 3990799Sgshapiro#include "os_share_solaris.hpp" 40132947Sgshapiro#include "prims/jniFastGetField.hpp" 4138094Speter#include "prims/jvm.h" 42156813Sru#include "prims/jvm_misc.hpp" 43129912Sgshapiro#include "runtime/arguments.hpp" 44129912Sgshapiro#include "runtime/extendedPC.hpp" 45129912Sgshapiro#include "runtime/globals.hpp" 46201433Sed#include "runtime/interfaceSupport.hpp" 47201390Sed#include "runtime/java.hpp" 4845090Smarkm#include "runtime/javaCalls.hpp" 4965970Sgshapiro#include "runtime/mutexLocker.hpp" 5038094Speter#include "runtime/objectMonitor.hpp" 51147225Sdes#include "runtime/osThread.hpp" 52147225Sdes#include "runtime/perfMemory.hpp" 5390799Sgshapiro#include "runtime/sharedRuntime.hpp" 54147225Sdes#include "runtime/statSampler.hpp" 55147225Sdes#include "runtime/stubRoutines.hpp" 5664567Sgshapiro#include "runtime/thread.inline.hpp" 5790799Sgshapiro#include "runtime/threadCritical.hpp" 5890799Sgshapiro#include "runtime/timer.hpp" 5964567Sgshapiro#include "services/attachListener.hpp" 6090799Sgshapiro#include "services/memTracker.hpp" 6190799Sgshapiro#include "services/runtimeService.hpp" 6290799Sgshapiro#include "utilities/decoder.hpp" 63156813Sru#include "utilities/defaultStream.hpp" 6467502Sgshapiro#include "utilities/events.hpp" 65168522Sgshapiro#include "utilities/growableArray.hpp" 66113091Sobrien#include "utilities/vmError.hpp" 6767502Sgshapiro 6867502Sgshapiro// put OS-includes here 6967502Sgshapiro# include <dlfcn.h> 7065970Sgshapiro# include <errno.h> 7165970Sgshapiro# include <exception> 7266961Sgshapiro# include <link.h> 7366961Sgshapiro# include <poll.h> 7465970Sgshapiro# include <pthread.h> 7565970Sgshapiro# include <pwd.h> 7690799Sgshapiro# include <schedctl.h> 7790799Sgshapiro# include <setjmp.h> 7855239Speter# include <signal.h> 7938094Speter# include <stdio.h> 80# include <alloca.h> 81# include <sys/filio.h> 82# include <sys/ipc.h> 83# include <sys/lwp.h> 84# include <sys/machelf.h> // for elf Sym structure used by dladdr1 85# include <sys/mman.h> 86# include <sys/processor.h> 87# include <sys/procset.h> 88# include <sys/pset.h> 89# include <sys/resource.h> 90# include <sys/shm.h> 91# include <sys/socket.h> 92# include <sys/stat.h> 93# include <sys/systeminfo.h> 94# include <sys/time.h> 95# include <sys/times.h> 96# include <sys/types.h> 97# include <sys/wait.h> 98# include <sys/utsname.h> 99# include <thread.h> 100# include <unistd.h> 101# include <sys/priocntl.h> 102# include <sys/rtpriocntl.h> 103# include <sys/tspriocntl.h> 104# include <sys/iapriocntl.h> 105# include <sys/fxpriocntl.h> 106# include <sys/loadavg.h> 107# include <string.h> 108# include <stdio.h> 109 110# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 111# include <sys/procfs.h> // see comment in <sys/procfs.h> 112 113#define MAX_PATH (2 * K) 114 115// for timer info max values which include all bits 116#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 117 118#ifdef _GNU_SOURCE 119// See bug #6514594 120extern "C" int madvise(caddr_t, size_t, int); 121extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 122 int attr, int mask); 123#endif //_GNU_SOURCE 124 125/* 126 MPSS Changes Start. 127 The JVM binary needs to be built and run on pre-Solaris 9 128 systems, but the constants needed by MPSS are only in Solaris 9 129 header files. They are textually replicated here to allow 130 building on earlier systems. Once building on Solaris 8 is 131 no longer a requirement, these #defines can be replaced by ordinary 132 system .h inclusion. 133 134 In earlier versions of the JDK and Solaris, we used ISM for large pages. 135 But ISM requires shared memory to achieve this and thus has many caveats. 136 MPSS is a fully transparent and is a cleaner way to get large pages. 137 Although we still require keeping ISM for backward compatiblitiy as well as 138 giving the opportunity to use large pages on older systems it is 139 recommended that MPSS be used for Solaris 9 and above. 140 141*/ 142 143#ifndef MC_HAT_ADVISE 144 145struct memcntl_mha { 146 uint_t mha_cmd; /* command(s) */ 147 uint_t mha_flags; 148 size_t mha_pagesize; 149}; 150#define MC_HAT_ADVISE 7 /* advise hat map size */ 151#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 152#define MAP_ALIGN 0x200 /* addr specifies alignment */ 153 154#endif 155// MPSS Changes End. 156 157 158// Here are some liblgrp types from sys/lgrp_user.h to be able to 159// compile on older systems without this header file. 160 161#ifndef MADV_ACCESS_LWP 162# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 163#endif 164#ifndef MADV_ACCESS_MANY 165# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 166#endif 167 168#ifndef LGRP_RSRC_CPU 169# define LGRP_RSRC_CPU 0 /* CPU resources */ 170#endif 171#ifndef LGRP_RSRC_MEM 172# define LGRP_RSRC_MEM 1 /* memory resources */ 173#endif 174 175// Some more macros from sys/mman.h that are not present in Solaris 8. 176 177#ifndef MAX_MEMINFO_CNT 178/* 179 * info_req request type definitions for meminfo 180 * request types starting with MEMINFO_V are used for Virtual addresses 181 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 182 * addresses 183 */ 184# define MEMINFO_SHIFT 16 185# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 186# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 187# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 188# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 189# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 190# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 191# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 192# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 193 194/* maximum number of addresses meminfo() can process at a time */ 195# define MAX_MEMINFO_CNT 256 196 197/* maximum number of request types */ 198# define MAX_MEMINFO_REQ 31 199#endif 200 201// see thr_setprio(3T) for the basis of these numbers 202#define MinimumPriority 0 203#define NormalPriority 64 204#define MaximumPriority 127 205 206// Values for ThreadPriorityPolicy == 1 207int prio_policy1[CriticalPriority+1] = { 208 -99999, 0, 16, 32, 48, 64, 209 80, 96, 112, 124, 127, 127 }; 210 211// System parameters used internally 212static clock_t clock_tics_per_sec = 100; 213 214// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 215static bool enabled_extended_FILE_stdio = false; 216 217// For diagnostics to print a message once. see run_periodic_checks 218static bool check_addr0_done = false; 219static sigset_t check_signal_done; 220static bool check_signals = true; 221 222address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 223address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 224 225address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 226 227 228// "default" initializers for missing libc APIs 229extern "C" { 230 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 231 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 232 233 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 234 static int lwp_cond_destroy(cond_t *cv) { return 0; } 235} 236 237// "default" initializers for pthread-based synchronization 238extern "C" { 239 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 240 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 241} 242 243// Thread Local Storage 244// This is common to all Solaris platforms so it is defined here, 245// in this common file. 246// The declarations are in the os_cpu threadLS*.hpp files. 247// 248// Static member initialization for TLS 249Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 250 251#ifndef PRODUCT 252#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 253 254int ThreadLocalStorage::_tcacheHit = 0; 255int ThreadLocalStorage::_tcacheMiss = 0; 256 257void ThreadLocalStorage::print_statistics() { 258 int total = _tcacheMiss+_tcacheHit; 259 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 260 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 261} 262#undef _PCT 263#endif // PRODUCT 264 265Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 266 int index) { 267 Thread *thread = get_thread_slow(); 268 if (thread != NULL) { 269 address sp = os::current_stack_pointer(); 270 guarantee(thread->_stack_base == NULL || 271 (sp <= thread->_stack_base && 272 sp >= thread->_stack_base - thread->_stack_size) || 273 is_error_reported(), 274 "sp must be inside of selected thread stack"); 275 276 thread->set_self_raw_id(raw_id); // mark for quick retrieval 277 _get_thread_cache[ index ] = thread; 278 } 279 return thread; 280} 281 282 283static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 284#define NO_CACHED_THREAD ((Thread*)all_zero) 285 286void ThreadLocalStorage::pd_set_thread(Thread* thread) { 287 288 // Store the new value before updating the cache to prevent a race 289 // between get_thread_via_cache_slowly() and this store operation. 290 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 291 292 // Update thread cache with new thread if setting on thread create, 293 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 294 uintptr_t raw = pd_raw_thread_id(); 295 int ix = pd_cache_index(raw); 296 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 297} 298 299void ThreadLocalStorage::pd_init() { 300 for (int i = 0; i < _pd_cache_size; i++) { 301 _get_thread_cache[i] = NO_CACHED_THREAD; 302 } 303} 304 305// Invalidate all the caches (happens to be the same as pd_init). 306void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 307 308#undef NO_CACHED_THREAD 309 310// END Thread Local Storage 311 312static inline size_t adjust_stack_size(address base, size_t size) { 313 if ((ssize_t)size < 0) { 314 // 4759953: Compensate for ridiculous stack size. 315 size = max_intx; 316 } 317 if (size > (size_t)base) { 318 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 319 size = (size_t)base; 320 } 321 return size; 322} 323 324static inline stack_t get_stack_info() { 325 stack_t st; 326 int retval = thr_stksegment(&st); 327 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 328 assert(retval == 0, "incorrect return value from thr_stksegment"); 329 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 330 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 331 return st; 332} 333 334address os::current_stack_base() { 335 int r = thr_main() ; 336 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 337 bool is_primordial_thread = r; 338 339 // Workaround 4352906, avoid calls to thr_stksegment by 340 // thr_main after the first one (it looks like we trash 341 // some data, causing the value for ss_sp to be incorrect). 342 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 343 stack_t st = get_stack_info(); 344 if (is_primordial_thread) { 345 // cache initial value of stack base 346 os::Solaris::_main_stack_base = (address)st.ss_sp; 347 } 348 return (address)st.ss_sp; 349 } else { 350 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 351 return os::Solaris::_main_stack_base; 352 } 353} 354 355size_t os::current_stack_size() { 356 size_t size; 357 358 int r = thr_main() ; 359 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 360 if(!r) { 361 size = get_stack_info().ss_size; 362 } else { 363 struct rlimit limits; 364 getrlimit(RLIMIT_STACK, &limits); 365 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 366 } 367 // base may not be page aligned 368 address base = current_stack_base(); 369 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 370 return (size_t)(base - bottom); 371} 372 373struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 374 return localtime_r(clock, res); 375} 376 377// interruptible infrastructure 378 379// setup_interruptible saves the thread state before going into an 380// interruptible system call. 381// The saved state is used to restore the thread to 382// its former state whether or not an interrupt is received. 383// Used by classloader os::read 384// os::restartable_read calls skip this layer and stay in _thread_in_native 385 386void os::Solaris::setup_interruptible(JavaThread* thread) { 387 388 JavaThreadState thread_state = thread->thread_state(); 389 390 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 391 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 392 OSThread* osthread = thread->osthread(); 393 osthread->set_saved_interrupt_thread_state(thread_state); 394 thread->frame_anchor()->make_walkable(thread); 395 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 396} 397 398// Version of setup_interruptible() for threads that are already in 399// _thread_blocked. Used by os_sleep(). 400void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 401 thread->frame_anchor()->make_walkable(thread); 402} 403 404JavaThread* os::Solaris::setup_interruptible() { 405 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 406 setup_interruptible(thread); 407 return thread; 408} 409 410void os::Solaris::try_enable_extended_io() { 411 typedef int (*enable_extended_FILE_stdio_t)(int, int); 412 413 if (!UseExtendedFileIO) { 414 return; 415 } 416 417 enable_extended_FILE_stdio_t enabler = 418 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 419 "enable_extended_FILE_stdio"); 420 if (enabler) { 421 enabler(-1, -1); 422 } 423} 424 425 426#ifdef ASSERT 427 428JavaThread* os::Solaris::setup_interruptible_native() { 429 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 430 JavaThreadState thread_state = thread->thread_state(); 431 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 432 return thread; 433} 434 435void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 436 JavaThreadState thread_state = thread->thread_state(); 437 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 438} 439#endif 440 441// cleanup_interruptible reverses the effects of setup_interruptible 442// setup_interruptible_already_blocked() does not need any cleanup. 443 444void os::Solaris::cleanup_interruptible(JavaThread* thread) { 445 OSThread* osthread = thread->osthread(); 446 447 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 448} 449 450// I/O interruption related counters called in _INTERRUPTIBLE 451 452void os::Solaris::bump_interrupted_before_count() { 453 RuntimeService::record_interrupted_before_count(); 454} 455 456void os::Solaris::bump_interrupted_during_count() { 457 RuntimeService::record_interrupted_during_count(); 458} 459 460static int _processors_online = 0; 461 462 jint os::Solaris::_os_thread_limit = 0; 463volatile jint os::Solaris::_os_thread_count = 0; 464 465julong os::available_memory() { 466 return Solaris::available_memory(); 467} 468 469julong os::Solaris::available_memory() { 470 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 471} 472 473julong os::Solaris::_physical_memory = 0; 474 475julong os::physical_memory() { 476 return Solaris::physical_memory(); 477} 478 479julong os::allocatable_physical_memory(julong size) { 480#ifdef _LP64 481 return size; 482#else 483 julong result = MIN2(size, (julong)3835*M); 484 if (!is_allocatable(result)) { 485 // Memory allocations will be aligned but the alignment 486 // is not known at this point. Alignments will 487 // be at most to LargePageSizeInBytes. Protect 488 // allocations from alignments up to illegal 489 // values. If at this point 2G is illegal. 490 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 491 result = MIN2(size, reasonable_size); 492 } 493 return result; 494#endif 495} 496 497static hrtime_t first_hrtime = 0; 498static const hrtime_t hrtime_hz = 1000*1000*1000; 499const int LOCK_BUSY = 1; 500const int LOCK_FREE = 0; 501const int LOCK_INVALID = -1; 502static volatile hrtime_t max_hrtime = 0; 503static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 504 505 506void os::Solaris::initialize_system_info() { 507 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 508 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 509 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 510} 511 512int os::active_processor_count() { 513 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 514 pid_t pid = getpid(); 515 psetid_t pset = PS_NONE; 516 // Are we running in a processor set or is there any processor set around? 517 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 518 uint_t pset_cpus; 519 // Query the number of cpus available to us. 520 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 521 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 522 _processors_online = pset_cpus; 523 return pset_cpus; 524 } 525 } 526 // Otherwise return number of online cpus 527 return online_cpus; 528} 529 530static bool find_processors_in_pset(psetid_t pset, 531 processorid_t** id_array, 532 uint_t* id_length) { 533 bool result = false; 534 // Find the number of processors in the processor set. 535 if (pset_info(pset, NULL, id_length, NULL) == 0) { 536 // Make up an array to hold their ids. 537 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 538 // Fill in the array with their processor ids. 539 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 540 result = true; 541 } 542 } 543 return result; 544} 545 546// Callers of find_processors_online() must tolerate imprecise results -- 547// the system configuration can change asynchronously because of DR 548// or explicit psradm operations. 549// 550// We also need to take care that the loop (below) terminates as the 551// number of processors online can change between the _SC_NPROCESSORS_ONLN 552// request and the loop that builds the list of processor ids. Unfortunately 553// there's no reliable way to determine the maximum valid processor id, 554// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 555// man pages, which claim the processor id set is "sparse, but 556// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 557// exit the loop. 558// 559// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 560// not available on S8.0. 561 562static bool find_processors_online(processorid_t** id_array, 563 uint* id_length) { 564 const processorid_t MAX_PROCESSOR_ID = 100000 ; 565 // Find the number of processors online. 566 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 567 // Make up an array to hold their ids. 568 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 569 // Processors need not be numbered consecutively. 570 long found = 0; 571 processorid_t next = 0; 572 while (found < *id_length && next < MAX_PROCESSOR_ID) { 573 processor_info_t info; 574 if (processor_info(next, &info) == 0) { 575 // NB, PI_NOINTR processors are effectively online ... 576 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 577 (*id_array)[found] = next; 578 found += 1; 579 } 580 } 581 next += 1; 582 } 583 if (found < *id_length) { 584 // The loop above didn't identify the expected number of processors. 585 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 586 // and re-running the loop, above, but there's no guarantee of progress 587 // if the system configuration is in flux. Instead, we just return what 588 // we've got. Note that in the worst case find_processors_online() could 589 // return an empty set. (As a fall-back in the case of the empty set we 590 // could just return the ID of the current processor). 591 *id_length = found ; 592 } 593 594 return true; 595} 596 597static bool assign_distribution(processorid_t* id_array, 598 uint id_length, 599 uint* distribution, 600 uint distribution_length) { 601 // We assume we can assign processorid_t's to uint's. 602 assert(sizeof(processorid_t) == sizeof(uint), 603 "can't convert processorid_t to uint"); 604 // Quick check to see if we won't succeed. 605 if (id_length < distribution_length) { 606 return false; 607 } 608 // Assign processor ids to the distribution. 609 // Try to shuffle processors to distribute work across boards, 610 // assuming 4 processors per board. 611 const uint processors_per_board = ProcessDistributionStride; 612 // Find the maximum processor id. 613 processorid_t max_id = 0; 614 for (uint m = 0; m < id_length; m += 1) { 615 max_id = MAX2(max_id, id_array[m]); 616 } 617 // The next id, to limit loops. 618 const processorid_t limit_id = max_id + 1; 619 // Make up markers for available processors. 620 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 621 for (uint c = 0; c < limit_id; c += 1) { 622 available_id[c] = false; 623 } 624 for (uint a = 0; a < id_length; a += 1) { 625 available_id[id_array[a]] = true; 626 } 627 // Step by "boards", then by "slot", copying to "assigned". 628 // NEEDS_CLEANUP: The assignment of processors should be stateful, 629 // remembering which processors have been assigned by 630 // previous calls, etc., so as to distribute several 631 // independent calls of this method. What we'd like is 632 // It would be nice to have an API that let us ask 633 // how many processes are bound to a processor, 634 // but we don't have that, either. 635 // In the short term, "board" is static so that 636 // subsequent distributions don't all start at board 0. 637 static uint board = 0; 638 uint assigned = 0; 639 // Until we've found enough processors .... 640 while (assigned < distribution_length) { 641 // ... find the next available processor in the board. 642 for (uint slot = 0; slot < processors_per_board; slot += 1) { 643 uint try_id = board * processors_per_board + slot; 644 if ((try_id < limit_id) && (available_id[try_id] == true)) { 645 distribution[assigned] = try_id; 646 available_id[try_id] = false; 647 assigned += 1; 648 break; 649 } 650 } 651 board += 1; 652 if (board * processors_per_board + 0 >= limit_id) { 653 board = 0; 654 } 655 } 656 if (available_id != NULL) { 657 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 658 } 659 return true; 660} 661 662void os::set_native_thread_name(const char *name) { 663 // Not yet implemented. 664 return; 665} 666 667bool os::distribute_processes(uint length, uint* distribution) { 668 bool result = false; 669 // Find the processor id's of all the available CPUs. 670 processorid_t* id_array = NULL; 671 uint id_length = 0; 672 // There are some races between querying information and using it, 673 // since processor sets can change dynamically. 674 psetid_t pset = PS_NONE; 675 // Are we running in a processor set? 676 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 677 result = find_processors_in_pset(pset, &id_array, &id_length); 678 } else { 679 result = find_processors_online(&id_array, &id_length); 680 } 681 if (result == true) { 682 if (id_length >= length) { 683 result = assign_distribution(id_array, id_length, distribution, length); 684 } else { 685 result = false; 686 } 687 } 688 if (id_array != NULL) { 689 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 690 } 691 return result; 692} 693 694bool os::bind_to_processor(uint processor_id) { 695 // We assume that a processorid_t can be stored in a uint. 696 assert(sizeof(uint) == sizeof(processorid_t), 697 "can't convert uint to processorid_t"); 698 int bind_result = 699 processor_bind(P_LWPID, // bind LWP. 700 P_MYID, // bind current LWP. 701 (processorid_t) processor_id, // id. 702 NULL); // don't return old binding. 703 return (bind_result == 0); 704} 705 706bool os::getenv(const char* name, char* buffer, int len) { 707 char* val = ::getenv( name ); 708 if ( val == NULL 709 || strlen(val) + 1 > len ) { 710 if (len > 0) buffer[0] = 0; // return a null string 711 return false; 712 } 713 strcpy( buffer, val ); 714 return true; 715} 716 717 718// Return true if user is running as root. 719 720bool os::have_special_privileges() { 721 static bool init = false; 722 static bool privileges = false; 723 if (!init) { 724 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 725 init = true; 726 } 727 return privileges; 728} 729 730 731void os::init_system_properties_values() { 732 char arch[12]; 733 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 734 735 // The next steps are taken in the product version: 736 // 737 // Obtain the JAVA_HOME value from the location of libjvm.so. 738 // This library should be located at: 739 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 740 // 741 // If "/jre/lib/" appears at the right place in the path, then we 742 // assume libjvm.so is installed in a JDK and we use this path. 743 // 744 // Otherwise exit with message: "Could not create the Java virtual machine." 745 // 746 // The following extra steps are taken in the debugging version: 747 // 748 // If "/jre/lib/" does NOT appear at the right place in the path 749 // instead of exit check for $JAVA_HOME environment variable. 750 // 751 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 752 // then we append a fake suffix "hotspot/libjvm.so" to this path so 753 // it looks like libjvm.so is installed there 754 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 755 // 756 // Otherwise exit. 757 // 758 // Important note: if the location of libjvm.so changes this 759 // code needs to be changed accordingly. 760 761 // The next few definitions allow the code to be verbatim: 762#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) 763#define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal) 764#define getenv(n) ::getenv(n) 765 766#define EXTENSIONS_DIR "/lib/ext" 767#define ENDORSED_DIR "/lib/endorsed" 768#define COMMON_DIR "/usr/jdk/packages" 769 770 { 771 /* sysclasspath, java_home, dll_dir */ 772 { 773 char *home_path; 774 char *dll_path; 775 char *pslash; 776 char buf[MAXPATHLEN]; 777 os::jvm_path(buf, sizeof(buf)); 778 779 // Found the full path to libjvm.so. 780 // Now cut the path to <java_home>/jre if we can. 781 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 782 pslash = strrchr(buf, '/'); 783 if (pslash != NULL) 784 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 785 dll_path = malloc(strlen(buf) + 1); 786 if (dll_path == NULL) 787 return; 788 strcpy(dll_path, buf); 789 Arguments::set_dll_dir(dll_path); 790 791 if (pslash != NULL) { 792 pslash = strrchr(buf, '/'); 793 if (pslash != NULL) { 794 *pslash = '\0'; /* get rid of /<arch> */ 795 pslash = strrchr(buf, '/'); 796 if (pslash != NULL) 797 *pslash = '\0'; /* get rid of /lib */ 798 } 799 } 800 801 home_path = malloc(strlen(buf) + 1); 802 if (home_path == NULL) 803 return; 804 strcpy(home_path, buf); 805 Arguments::set_java_home(home_path); 806 807 if (!set_boot_path('/', ':')) 808 return; 809 } 810 811 /* 812 * Where to look for native libraries 813 */ 814 { 815 // Use dlinfo() to determine the correct java.library.path. 816 // 817 // If we're launched by the Java launcher, and the user 818 // does not set java.library.path explicitly on the commandline, 819 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 820 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 821 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 822 // /usr/lib), which is exactly what we want. 823 // 824 // If the user does set java.library.path, it completely 825 // overwrites this setting, and always has. 826 // 827 // If we're not launched by the Java launcher, we may 828 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 829 // settings. Again, dlinfo does exactly what we want. 830 831 Dl_serinfo _info, *info = &_info; 832 Dl_serpath *path; 833 char* library_path; 834 char *common_path; 835 int i; 836 837 // determine search path count and required buffer size 838 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 839 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 840 } 841 842 // allocate new buffer and initialize 843 info = (Dl_serinfo*)malloc(_info.dls_size); 844 if (info == NULL) { 845 vm_exit_out_of_memory(_info.dls_size, 846 "init_system_properties_values info"); 847 } 848 info->dls_size = _info.dls_size; 849 info->dls_cnt = _info.dls_cnt; 850 851 // obtain search path information 852 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 853 free(info); 854 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 855 } 856 857 path = &info->dls_serpath[0]; 858 859 // Note: Due to a legacy implementation, most of the library path 860 // is set in the launcher. This was to accomodate linking restrictions 861 // on legacy Solaris implementations (which are no longer supported). 862 // Eventually, all the library path setting will be done here. 863 // 864 // However, to prevent the proliferation of improperly built native 865 // libraries, the new path component /usr/jdk/packages is added here. 866 867 // Determine the actual CPU architecture. 868 char cpu_arch[12]; 869 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 870#ifdef _LP64 871 // If we are a 64-bit vm, perform the following translations: 872 // sparc -> sparcv9 873 // i386 -> amd64 874 if (strcmp(cpu_arch, "sparc") == 0) 875 strcat(cpu_arch, "v9"); 876 else if (strcmp(cpu_arch, "i386") == 0) 877 strcpy(cpu_arch, "amd64"); 878#endif 879 880 // Construct the invariant part of ld_library_path. Note that the 881 // space for the colon and the trailing null are provided by the 882 // nulls included by the sizeof operator. 883 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 884 common_path = malloc(bufsize); 885 if (common_path == NULL) { 886 free(info); 887 vm_exit_out_of_memory(bufsize, 888 "init_system_properties_values common_path"); 889 } 890 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 891 892 // struct size is more than sufficient for the path components obtained 893 // through the dlinfo() call, so only add additional space for the path 894 // components explicitly added here. 895 bufsize = info->dls_size + strlen(common_path); 896 library_path = malloc(bufsize); 897 if (library_path == NULL) { 898 free(info); 899 free(common_path); 900 vm_exit_out_of_memory(bufsize, 901 "init_system_properties_values library_path"); 902 } 903 library_path[0] = '\0'; 904 905 // Construct the desired Java library path from the linker's library 906 // search path. 907 // 908 // For compatibility, it is optimal that we insert the additional path 909 // components specific to the Java VM after those components specified 910 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 911 // infrastructure. 912 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 913 strcpy(library_path, common_path); 914 } else { 915 int inserted = 0; 916 for (i = 0; i < info->dls_cnt; i++, path++) { 917 uint_t flags = path->dls_flags & LA_SER_MASK; 918 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 919 strcat(library_path, common_path); 920 strcat(library_path, os::path_separator()); 921 inserted = 1; 922 } 923 strcat(library_path, path->dls_name); 924 strcat(library_path, os::path_separator()); 925 } 926 // eliminate trailing path separator 927 library_path[strlen(library_path)-1] = '\0'; 928 } 929 930 // happens before argument parsing - can't use a trace flag 931 // tty->print_raw("init_system_properties_values: native lib path: "); 932 // tty->print_raw_cr(library_path); 933 934 // callee copies into its own buffer 935 Arguments::set_library_path(library_path); 936 937 free(common_path); 938 free(library_path); 939 free(info); 940 } 941 942 /* 943 * Extensions directories. 944 * 945 * Note that the space for the colon and the trailing null are provided 946 * by the nulls included by the sizeof operator (so actually one byte more 947 * than necessary is allocated). 948 */ 949 { 950 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 951 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 952 sizeof(EXTENSIONS_DIR)); 953 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 954 Arguments::get_java_home()); 955 Arguments::set_ext_dirs(buf); 956 } 957 958 /* Endorsed standards default directory. */ 959 { 960 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 961 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 962 Arguments::set_endorsed_dirs(buf); 963 } 964 } 965 966#undef malloc 967#undef free 968#undef getenv 969#undef EXTENSIONS_DIR 970#undef ENDORSED_DIR 971#undef COMMON_DIR 972 973} 974 975void os::breakpoint() { 976 BREAKPOINT; 977} 978 979bool os::obsolete_option(const JavaVMOption *option) 980{ 981 if (!strncmp(option->optionString, "-Xt", 3)) { 982 return true; 983 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 984 return true; 985 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 986 return true; 987 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 988 return true; 989 } 990 return false; 991} 992 993bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 994 address stackStart = (address)thread->stack_base(); 995 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 996 if (sp < stackStart && sp >= stackEnd ) return true; 997 return false; 998} 999 1000extern "C" void breakpoint() { 1001 // use debugger to set breakpoint here 1002} 1003 1004static thread_t main_thread; 1005 1006// Thread start routine for all new Java threads 1007extern "C" void* java_start(void* thread_addr) { 1008 // Try to randomize the cache line index of hot stack frames. 1009 // This helps when threads of the same stack traces evict each other's 1010 // cache lines. The threads can be either from the same JVM instance, or 1011 // from different JVM instances. The benefit is especially true for 1012 // processors with hyperthreading technology. 1013 static int counter = 0; 1014 int pid = os::current_process_id(); 1015 alloca(((pid ^ counter++) & 7) * 128); 1016 1017 int prio; 1018 Thread* thread = (Thread*)thread_addr; 1019 OSThread* osthr = thread->osthread(); 1020 1021 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 1022 thread->_schedctl = (void *) schedctl_init () ; 1023 1024 if (UseNUMA) { 1025 int lgrp_id = os::numa_get_group_id(); 1026 if (lgrp_id != -1) { 1027 thread->set_lgrp_id(lgrp_id); 1028 } 1029 } 1030 1031 // If the creator called set priority before we started, 1032 // we need to call set_native_priority now that we have an lwp. 1033 // We used to get the priority from thr_getprio (we called 1034 // thr_setprio way back in create_thread) and pass it to 1035 // set_native_priority, but Solaris scales the priority 1036 // in java_to_os_priority, so when we read it back here, 1037 // we pass trash to set_native_priority instead of what's 1038 // in java_to_os_priority. So we save the native priority 1039 // in the osThread and recall it here. 1040 1041 if ( osthr->thread_id() != -1 ) { 1042 if ( UseThreadPriorities ) { 1043 int prio = osthr->native_priority(); 1044 if (ThreadPriorityVerbose) { 1045 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 1046 INTPTR_FORMAT ", setting priority: %d\n", 1047 osthr->thread_id(), osthr->lwp_id(), prio); 1048 } 1049 os::set_native_priority(thread, prio); 1050 } 1051 } else if (ThreadPriorityVerbose) { 1052 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1053 } 1054 1055 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1056 1057 // initialize signal mask for this thread 1058 os::Solaris::hotspot_sigmask(thread); 1059 1060 thread->run(); 1061 1062 // One less thread is executing 1063 // When the VMThread gets here, the main thread may have already exited 1064 // which frees the CodeHeap containing the Atomic::dec code 1065 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1066 Atomic::dec(&os::Solaris::_os_thread_count); 1067 } 1068 1069 if (UseDetachedThreads) { 1070 thr_exit(NULL); 1071 ShouldNotReachHere(); 1072 } 1073 return NULL; 1074} 1075 1076static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1077 // Allocate the OSThread object 1078 OSThread* osthread = new OSThread(NULL, NULL); 1079 if (osthread == NULL) return NULL; 1080 1081 // Store info on the Solaris thread into the OSThread 1082 osthread->set_thread_id(thread_id); 1083 osthread->set_lwp_id(_lwp_self()); 1084 thread->_schedctl = (void *) schedctl_init () ; 1085 1086 if (UseNUMA) { 1087 int lgrp_id = os::numa_get_group_id(); 1088 if (lgrp_id != -1) { 1089 thread->set_lgrp_id(lgrp_id); 1090 } 1091 } 1092 1093 if ( ThreadPriorityVerbose ) { 1094 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1095 osthread->thread_id(), osthread->lwp_id() ); 1096 } 1097 1098 // Initial thread state is INITIALIZED, not SUSPENDED 1099 osthread->set_state(INITIALIZED); 1100 1101 return osthread; 1102} 1103 1104void os::Solaris::hotspot_sigmask(Thread* thread) { 1105 1106 //Save caller's signal mask 1107 sigset_t sigmask; 1108 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1109 OSThread *osthread = thread->osthread(); 1110 osthread->set_caller_sigmask(sigmask); 1111 1112 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1113 if (!ReduceSignalUsage) { 1114 if (thread->is_VM_thread()) { 1115 // Only the VM thread handles BREAK_SIGNAL ... 1116 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1117 } else { 1118 // ... all other threads block BREAK_SIGNAL 1119 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1120 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1121 } 1122 } 1123} 1124 1125bool os::create_attached_thread(JavaThread* thread) { 1126#ifdef ASSERT 1127 thread->verify_not_published(); 1128#endif 1129 OSThread* osthread = create_os_thread(thread, thr_self()); 1130 if (osthread == NULL) { 1131 return false; 1132 } 1133 1134 // Initial thread state is RUNNABLE 1135 osthread->set_state(RUNNABLE); 1136 thread->set_osthread(osthread); 1137 1138 // initialize signal mask for this thread 1139 // and save the caller's signal mask 1140 os::Solaris::hotspot_sigmask(thread); 1141 1142 return true; 1143} 1144 1145bool os::create_main_thread(JavaThread* thread) { 1146#ifdef ASSERT 1147 thread->verify_not_published(); 1148#endif 1149 if (_starting_thread == NULL) { 1150 _starting_thread = create_os_thread(thread, main_thread); 1151 if (_starting_thread == NULL) { 1152 return false; 1153 } 1154 } 1155 1156 // The primodial thread is runnable from the start 1157 _starting_thread->set_state(RUNNABLE); 1158 1159 thread->set_osthread(_starting_thread); 1160 1161 // initialize signal mask for this thread 1162 // and save the caller's signal mask 1163 os::Solaris::hotspot_sigmask(thread); 1164 1165 return true; 1166} 1167 1168// _T2_libthread is true if we believe we are running with the newer 1169// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1170bool os::Solaris::_T2_libthread = false; 1171 1172bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1173 // Allocate the OSThread object 1174 OSThread* osthread = new OSThread(NULL, NULL); 1175 if (osthread == NULL) { 1176 return false; 1177 } 1178 1179 if ( ThreadPriorityVerbose ) { 1180 char *thrtyp; 1181 switch ( thr_type ) { 1182 case vm_thread: 1183 thrtyp = (char *)"vm"; 1184 break; 1185 case cgc_thread: 1186 thrtyp = (char *)"cgc"; 1187 break; 1188 case pgc_thread: 1189 thrtyp = (char *)"pgc"; 1190 break; 1191 case java_thread: 1192 thrtyp = (char *)"java"; 1193 break; 1194 case compiler_thread: 1195 thrtyp = (char *)"compiler"; 1196 break; 1197 case watcher_thread: 1198 thrtyp = (char *)"watcher"; 1199 break; 1200 default: 1201 thrtyp = (char *)"unknown"; 1202 break; 1203 } 1204 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1205 } 1206 1207 // Calculate stack size if it's not specified by caller. 1208 if (stack_size == 0) { 1209 // The default stack size 1M (2M for LP64). 1210 stack_size = (BytesPerWord >> 2) * K * K; 1211 1212 switch (thr_type) { 1213 case os::java_thread: 1214 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1215 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1216 break; 1217 case os::compiler_thread: 1218 if (CompilerThreadStackSize > 0) { 1219 stack_size = (size_t)(CompilerThreadStackSize * K); 1220 break; 1221 } // else fall through: 1222 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1223 case os::vm_thread: 1224 case os::pgc_thread: 1225 case os::cgc_thread: 1226 case os::watcher_thread: 1227 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1228 break; 1229 } 1230 } 1231 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1232 1233 // Initial state is ALLOCATED but not INITIALIZED 1234 osthread->set_state(ALLOCATED); 1235 1236 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1237 // We got lots of threads. Check if we still have some address space left. 1238 // Need to be at least 5Mb of unreserved address space. We do check by 1239 // trying to reserve some. 1240 const size_t VirtualMemoryBangSize = 20*K*K; 1241 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1242 if (mem == NULL) { 1243 delete osthread; 1244 return false; 1245 } else { 1246 // Release the memory again 1247 os::release_memory(mem, VirtualMemoryBangSize); 1248 } 1249 } 1250 1251 // Setup osthread because the child thread may need it. 1252 thread->set_osthread(osthread); 1253 1254 // Create the Solaris thread 1255 // explicit THR_BOUND for T2_libthread case in case 1256 // that assumption is not accurate, but our alternate signal stack 1257 // handling is based on it which must have bound threads 1258 thread_t tid = 0; 1259 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1260 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1261 (thr_type == vm_thread) || 1262 (thr_type == cgc_thread) || 1263 (thr_type == pgc_thread) || 1264 (thr_type == compiler_thread && BackgroundCompilation)) ? 1265 THR_BOUND : 0); 1266 int status; 1267 1268 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1269 // 1270 // On multiprocessors systems, libthread sometimes under-provisions our 1271 // process with LWPs. On a 30-way systems, for instance, we could have 1272 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1273 // to our process. This can result in under utilization of PEs. 1274 // I suspect the problem is related to libthread's LWP 1275 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1276 // upcall policy. 1277 // 1278 // The following code is palliative -- it attempts to ensure that our 1279 // process has sufficient LWPs to take advantage of multiple PEs. 1280 // Proper long-term cures include using user-level threads bound to LWPs 1281 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1282 // slight timing window with respect to sampling _os_thread_count, but 1283 // the race is benign. Also, we should periodically recompute 1284 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1285 // the number of PEs in our partition. You might be tempted to use 1286 // THR_NEW_LWP here, but I'd recommend against it as that could 1287 // result in undesirable growth of the libthread's LWP pool. 1288 // The fix below isn't sufficient; for instance, it doesn't take into count 1289 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1290 // 1291 // Some pathologies this scheme doesn't handle: 1292 // * Threads can block, releasing the LWPs. The LWPs can age out. 1293 // When a large number of threads become ready again there aren't 1294 // enough LWPs available to service them. This can occur when the 1295 // number of ready threads oscillates. 1296 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1297 // 1298 // Finally, we should call thr_setconcurrency() periodically to refresh 1299 // the LWP pool and thwart the LWP age-out mechanism. 1300 // The "+3" term provides a little slop -- we want to slightly overprovision. 1301 1302 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1303 if (!(flags & THR_BOUND)) { 1304 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1305 } 1306 } 1307 // Although this doesn't hurt, we should warn of undefined behavior 1308 // when using unbound T1 threads with schedctl(). This should never 1309 // happen, as the compiler and VM threads are always created bound 1310 DEBUG_ONLY( 1311 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1312 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1313 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1314 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1315 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1316 } 1317 ); 1318 1319 1320 // Mark that we don't have an lwp or thread id yet. 1321 // In case we attempt to set the priority before the thread starts. 1322 osthread->set_lwp_id(-1); 1323 osthread->set_thread_id(-1); 1324 1325 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1326 if (status != 0) { 1327 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1328 perror("os::create_thread"); 1329 } 1330 thread->set_osthread(NULL); 1331 // Need to clean up stuff we've allocated so far 1332 delete osthread; 1333 return false; 1334 } 1335 1336 Atomic::inc(&os::Solaris::_os_thread_count); 1337 1338 // Store info on the Solaris thread into the OSThread 1339 osthread->set_thread_id(tid); 1340 1341 // Remember that we created this thread so we can set priority on it 1342 osthread->set_vm_created(); 1343 1344 // Set the default thread priority. If using bound threads, setting 1345 // lwp priority will be delayed until thread start. 1346 set_native_priority(thread, 1347 DefaultThreadPriority == -1 ? 1348 java_to_os_priority[NormPriority] : 1349 DefaultThreadPriority); 1350 1351 // Initial thread state is INITIALIZED, not SUSPENDED 1352 osthread->set_state(INITIALIZED); 1353 1354 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1355 return true; 1356} 1357 1358/* defined for >= Solaris 10. This allows builds on earlier versions 1359 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1360 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1361 * and -XX:+UseAltSigs does nothing since these should have no conflict 1362 */ 1363#if !defined(SIGJVM1) 1364#define SIGJVM1 39 1365#define SIGJVM2 40 1366#endif 1367 1368debug_only(static bool signal_sets_initialized = false); 1369static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1370int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1371int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1372 1373bool os::Solaris::is_sig_ignored(int sig) { 1374 struct sigaction oact; 1375 sigaction(sig, (struct sigaction*)NULL, &oact); 1376 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1377 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1378 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1379 return true; 1380 else 1381 return false; 1382} 1383 1384// Note: SIGRTMIN is a macro that calls sysconf() so it will 1385// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1386static bool isJVM1available() { 1387 return SIGJVM1 < SIGRTMIN; 1388} 1389 1390void os::Solaris::signal_sets_init() { 1391 // Should also have an assertion stating we are still single-threaded. 1392 assert(!signal_sets_initialized, "Already initialized"); 1393 // Fill in signals that are necessarily unblocked for all threads in 1394 // the VM. Currently, we unblock the following signals: 1395 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1396 // by -Xrs (=ReduceSignalUsage)); 1397 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1398 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1399 // the dispositions or masks wrt these signals. 1400 // Programs embedding the VM that want to use the above signals for their 1401 // own purposes must, at this time, use the "-Xrs" option to prevent 1402 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1403 // (See bug 4345157, and other related bugs). 1404 // In reality, though, unblocking these signals is really a nop, since 1405 // these signals are not blocked by default. 1406 sigemptyset(&unblocked_sigs); 1407 sigemptyset(&allowdebug_blocked_sigs); 1408 sigaddset(&unblocked_sigs, SIGILL); 1409 sigaddset(&unblocked_sigs, SIGSEGV); 1410 sigaddset(&unblocked_sigs, SIGBUS); 1411 sigaddset(&unblocked_sigs, SIGFPE); 1412 1413 if (isJVM1available) { 1414 os::Solaris::set_SIGinterrupt(SIGJVM1); 1415 os::Solaris::set_SIGasync(SIGJVM2); 1416 } else if (UseAltSigs) { 1417 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1418 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1419 } else { 1420 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1421 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1422 } 1423 1424 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1425 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1426 1427 if (!ReduceSignalUsage) { 1428 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1429 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1430 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1431 } 1432 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1433 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1434 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1435 } 1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1437 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1439 } 1440 } 1441 // Fill in signals that are blocked by all but the VM thread. 1442 sigemptyset(&vm_sigs); 1443 if (!ReduceSignalUsage) 1444 sigaddset(&vm_sigs, BREAK_SIGNAL); 1445 debug_only(signal_sets_initialized = true); 1446 1447 // For diagnostics only used in run_periodic_checks 1448 sigemptyset(&check_signal_done); 1449} 1450 1451// These are signals that are unblocked while a thread is running Java. 1452// (For some reason, they get blocked by default.) 1453sigset_t* os::Solaris::unblocked_signals() { 1454 assert(signal_sets_initialized, "Not initialized"); 1455 return &unblocked_sigs; 1456} 1457 1458// These are the signals that are blocked while a (non-VM) thread is 1459// running Java. Only the VM thread handles these signals. 1460sigset_t* os::Solaris::vm_signals() { 1461 assert(signal_sets_initialized, "Not initialized"); 1462 return &vm_sigs; 1463} 1464 1465// These are signals that are blocked during cond_wait to allow debugger in 1466sigset_t* os::Solaris::allowdebug_blocked_signals() { 1467 assert(signal_sets_initialized, "Not initialized"); 1468 return &allowdebug_blocked_sigs; 1469} 1470 1471 1472void _handle_uncaught_cxx_exception() { 1473 VMError err("An uncaught C++ exception"); 1474 err.report_and_die(); 1475} 1476 1477 1478// First crack at OS-specific initialization, from inside the new thread. 1479void os::initialize_thread(Thread* thr) { 1480 int r = thr_main() ; 1481 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1482 if (r) { 1483 JavaThread* jt = (JavaThread *)thr; 1484 assert(jt != NULL,"Sanity check"); 1485 size_t stack_size; 1486 address base = jt->stack_base(); 1487 if (Arguments::created_by_java_launcher()) { 1488 // Use 2MB to allow for Solaris 7 64 bit mode. 1489 stack_size = JavaThread::stack_size_at_create() == 0 1490 ? 2048*K : JavaThread::stack_size_at_create(); 1491 1492 // There are rare cases when we may have already used more than 1493 // the basic stack size allotment before this method is invoked. 1494 // Attempt to allow for a normally sized java_stack. 1495 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1496 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1497 } else { 1498 // 6269555: If we were not created by a Java launcher, i.e. if we are 1499 // running embedded in a native application, treat the primordial thread 1500 // as much like a native attached thread as possible. This means using 1501 // the current stack size from thr_stksegment(), unless it is too large 1502 // to reliably setup guard pages. A reasonable max size is 8MB. 1503 size_t current_size = current_stack_size(); 1504 // This should never happen, but just in case.... 1505 if (current_size == 0) current_size = 2 * K * K; 1506 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1507 } 1508 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1509 stack_size = (size_t)(base - bottom); 1510 1511 assert(stack_size > 0, "Stack size calculation problem"); 1512 1513 if (stack_size > jt->stack_size()) { 1514 NOT_PRODUCT( 1515 struct rlimit limits; 1516 getrlimit(RLIMIT_STACK, &limits); 1517 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1518 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1519 ) 1520 tty->print_cr( 1521 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1522 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1523 "See limit(1) to increase the stack size limit.", 1524 stack_size / K, jt->stack_size() / K); 1525 vm_exit(1); 1526 } 1527 assert(jt->stack_size() >= stack_size, 1528 "Attempt to map more stack than was allocated"); 1529 jt->set_stack_size(stack_size); 1530 } 1531 1532 // 5/22/01: Right now alternate signal stacks do not handle 1533 // throwing stack overflow exceptions, see bug 4463178 1534 // Until a fix is found for this, T2 will NOT imply alternate signal 1535 // stacks. 1536 // If using T2 libthread threads, install an alternate signal stack. 1537 // Because alternate stacks associate with LWPs on Solaris, 1538 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1539 // we prefer to explicitly stack bang. 1540 // If not using T2 libthread, but using UseBoundThreads any threads 1541 // (primordial thread, jni_attachCurrentThread) we do not create, 1542 // probably are not bound, therefore they can not have an alternate 1543 // signal stack. Since our stack banging code is generated and 1544 // is shared across threads, all threads must be bound to allow 1545 // using alternate signal stacks. The alternative is to interpose 1546 // on _lwp_create to associate an alt sig stack with each LWP, 1547 // and this could be a problem when the JVM is embedded. 1548 // We would prefer to use alternate signal stacks with T2 1549 // Since there is currently no accurate way to detect T2 1550 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1551 // on installing alternate signal stacks 1552 1553 1554 // 05/09/03: removed alternate signal stack support for Solaris 1555 // The alternate signal stack mechanism is no longer needed to 1556 // handle stack overflow. This is now handled by allocating 1557 // guard pages (red zone) and stackbanging. 1558 // Initially the alternate signal stack mechanism was removed because 1559 // it did not work with T1 llibthread. Alternate 1560 // signal stacks MUST have all threads bound to lwps. Applications 1561 // can create their own threads and attach them without their being 1562 // bound under T1. This is frequently the case for the primordial thread. 1563 // If we were ever to reenable this mechanism we would need to 1564 // use the dynamic check for T2 libthread. 1565 1566 os::Solaris::init_thread_fpu_state(); 1567 std::set_terminate(_handle_uncaught_cxx_exception); 1568} 1569 1570 1571 1572// Free Solaris resources related to the OSThread 1573void os::free_thread(OSThread* osthread) { 1574 assert(osthread != NULL, "os::free_thread but osthread not set"); 1575 1576 1577 // We are told to free resources of the argument thread, 1578 // but we can only really operate on the current thread. 1579 // The main thread must take the VMThread down synchronously 1580 // before the main thread exits and frees up CodeHeap 1581 guarantee((Thread::current()->osthread() == osthread 1582 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1583 if (Thread::current()->osthread() == osthread) { 1584 // Restore caller's signal mask 1585 sigset_t sigmask = osthread->caller_sigmask(); 1586 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1587 } 1588 delete osthread; 1589} 1590 1591void os::pd_start_thread(Thread* thread) { 1592 int status = thr_continue(thread->osthread()->thread_id()); 1593 assert_status(status == 0, status, "thr_continue failed"); 1594} 1595 1596 1597intx os::current_thread_id() { 1598 return (intx)thr_self(); 1599} 1600 1601static pid_t _initial_pid = 0; 1602 1603int os::current_process_id() { 1604 return (int)(_initial_pid ? _initial_pid : getpid()); 1605} 1606 1607int os::allocate_thread_local_storage() { 1608 // %%% in Win32 this allocates a memory segment pointed to by a 1609 // register. Dan Stein can implement a similar feature in 1610 // Solaris. Alternatively, the VM can do the same thing 1611 // explicitly: malloc some storage and keep the pointer in a 1612 // register (which is part of the thread's context) (or keep it 1613 // in TLS). 1614 // %%% In current versions of Solaris, thr_self and TSD can 1615 // be accessed via short sequences of displaced indirections. 1616 // The value of thr_self is available as %g7(36). 1617 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1618 // assuming that the current thread already has a value bound to k. 1619 // It may be worth experimenting with such access patterns, 1620 // and later having the parameters formally exported from a Solaris 1621 // interface. I think, however, that it will be faster to 1622 // maintain the invariant that %g2 always contains the 1623 // JavaThread in Java code, and have stubs simply 1624 // treat %g2 as a caller-save register, preserving it in a %lN. 1625 thread_key_t tk; 1626 if (thr_keycreate( &tk, NULL ) ) 1627 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1628 "(%s)", strerror(errno))); 1629 return int(tk); 1630} 1631 1632void os::free_thread_local_storage(int index) { 1633 // %%% don't think we need anything here 1634 // if ( pthread_key_delete((pthread_key_t) tk) ) 1635 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1636} 1637 1638#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1639 // small number - point is NO swap space available 1640void os::thread_local_storage_at_put(int index, void* value) { 1641 // %%% this is used only in threadLocalStorage.cpp 1642 if (thr_setspecific((thread_key_t)index, value)) { 1643 if (errno == ENOMEM) { 1644 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1645 } else { 1646 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1647 "(%s)", strerror(errno))); 1648 } 1649 } else { 1650 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1651 } 1652} 1653 1654// This function could be called before TLS is initialized, for example, when 1655// VM receives an async signal or when VM causes a fatal error during 1656// initialization. Return NULL if thr_getspecific() fails. 1657void* os::thread_local_storage_at(int index) { 1658 // %%% this is used only in threadLocalStorage.cpp 1659 void* r = NULL; 1660 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1661} 1662 1663 1664// gethrtime can move backwards if read from one cpu and then a different cpu 1665// getTimeNanos is guaranteed to not move backward on Solaris 1666// local spinloop created as faster for a CAS on an int than 1667// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1668// supported on sparc v8 or pre supports_cx8 intel boxes. 1669// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1670// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1671inline hrtime_t oldgetTimeNanos() { 1672 int gotlock = LOCK_INVALID; 1673 hrtime_t newtime = gethrtime(); 1674 1675 for (;;) { 1676// grab lock for max_hrtime 1677 int curlock = max_hrtime_lock; 1678 if (curlock & LOCK_BUSY) continue; 1679 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1680 if (newtime > max_hrtime) { 1681 max_hrtime = newtime; 1682 } else { 1683 newtime = max_hrtime; 1684 } 1685 // release lock 1686 max_hrtime_lock = LOCK_FREE; 1687 return newtime; 1688 } 1689} 1690// gethrtime can move backwards if read from one cpu and then a different cpu 1691// getTimeNanos is guaranteed to not move backward on Solaris 1692inline hrtime_t getTimeNanos() { 1693 if (VM_Version::supports_cx8()) { 1694 const hrtime_t now = gethrtime(); 1695 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1696 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1697 if (now <= prev) return prev; // same or retrograde time; 1698 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1699 assert(obsv >= prev, "invariant"); // Monotonicity 1700 // If the CAS succeeded then we're done and return "now". 1701 // If the CAS failed and the observed value "obs" is >= now then 1702 // we should return "obs". If the CAS failed and now > obs > prv then 1703 // some other thread raced this thread and installed a new value, in which case 1704 // we could either (a) retry the entire operation, (b) retry trying to install now 1705 // or (c) just return obs. We use (c). No loop is required although in some cases 1706 // we might discard a higher "now" value in deference to a slightly lower but freshly 1707 // installed obs value. That's entirely benign -- it admits no new orderings compared 1708 // to (a) or (b) -- and greatly reduces coherence traffic. 1709 // We might also condition (c) on the magnitude of the delta between obs and now. 1710 // Avoiding excessive CAS operations to hot RW locations is critical. 1711 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1712 return (prev == obsv) ? now : obsv ; 1713 } else { 1714 return oldgetTimeNanos(); 1715 } 1716} 1717 1718// Time since start-up in seconds to a fine granularity. 1719// Used by VMSelfDestructTimer and the MemProfiler. 1720double os::elapsedTime() { 1721 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1722} 1723 1724jlong os::elapsed_counter() { 1725 return (jlong)(getTimeNanos() - first_hrtime); 1726} 1727 1728jlong os::elapsed_frequency() { 1729 return hrtime_hz; 1730} 1731 1732// Return the real, user, and system times in seconds from an 1733// arbitrary fixed point in the past. 1734bool os::getTimesSecs(double* process_real_time, 1735 double* process_user_time, 1736 double* process_system_time) { 1737 struct tms ticks; 1738 clock_t real_ticks = times(&ticks); 1739 1740 if (real_ticks == (clock_t) (-1)) { 1741 return false; 1742 } else { 1743 double ticks_per_second = (double) clock_tics_per_sec; 1744 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1745 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1746 // For consistency return the real time from getTimeNanos() 1747 // converted to seconds. 1748 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1749 1750 return true; 1751 } 1752} 1753 1754bool os::supports_vtime() { return true; } 1755 1756bool os::enable_vtime() { 1757 int fd = ::open("/proc/self/ctl", O_WRONLY); 1758 if (fd == -1) 1759 return false; 1760 1761 long cmd[] = { PCSET, PR_MSACCT }; 1762 int res = ::write(fd, cmd, sizeof(long) * 2); 1763 ::close(fd); 1764 if (res != sizeof(long) * 2) 1765 return false; 1766 1767 return true; 1768} 1769 1770bool os::vtime_enabled() { 1771 int fd = ::open("/proc/self/status", O_RDONLY); 1772 if (fd == -1) 1773 return false; 1774 1775 pstatus_t status; 1776 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1777 ::close(fd); 1778 if (res != sizeof(pstatus_t)) 1779 return false; 1780 1781 return status.pr_flags & PR_MSACCT; 1782} 1783 1784double os::elapsedVTime() { 1785 return (double)gethrvtime() / (double)hrtime_hz; 1786} 1787 1788// Used internally for comparisons only 1789// getTimeMillis guaranteed to not move backwards on Solaris 1790jlong getTimeMillis() { 1791 jlong nanotime = getTimeNanos(); 1792 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1793} 1794 1795// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1796jlong os::javaTimeMillis() { 1797 timeval t; 1798 if (gettimeofday( &t, NULL) == -1) 1799 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1800 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1801} 1802 1803jlong os::javaTimeNanos() { 1804 return (jlong)getTimeNanos(); 1805} 1806 1807void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1808 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1809 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1810 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1811 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1812} 1813 1814char * os::local_time_string(char *buf, size_t buflen) { 1815 struct tm t; 1816 time_t long_time; 1817 time(&long_time); 1818 localtime_r(&long_time, &t); 1819 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1820 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1821 t.tm_hour, t.tm_min, t.tm_sec); 1822 return buf; 1823} 1824 1825// Note: os::shutdown() might be called very early during initialization, or 1826// called from signal handler. Before adding something to os::shutdown(), make 1827// sure it is async-safe and can handle partially initialized VM. 1828void os::shutdown() { 1829 1830 // allow PerfMemory to attempt cleanup of any persistent resources 1831 perfMemory_exit(); 1832 1833 // needs to remove object in file system 1834 AttachListener::abort(); 1835 1836 // flush buffered output, finish log files 1837 ostream_abort(); 1838 1839 // Check for abort hook 1840 abort_hook_t abort_hook = Arguments::abort_hook(); 1841 if (abort_hook != NULL) { 1842 abort_hook(); 1843 } 1844} 1845 1846// Note: os::abort() might be called very early during initialization, or 1847// called from signal handler. Before adding something to os::abort(), make 1848// sure it is async-safe and can handle partially initialized VM. 1849void os::abort(bool dump_core) { 1850 os::shutdown(); 1851 if (dump_core) { 1852#ifndef PRODUCT 1853 fdStream out(defaultStream::output_fd()); 1854 out.print_raw("Current thread is "); 1855 char buf[16]; 1856 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1857 out.print_raw_cr(buf); 1858 out.print_raw_cr("Dumping core ..."); 1859#endif 1860 ::abort(); // dump core (for debugging) 1861 } 1862 1863 ::exit(1); 1864} 1865 1866// Die immediately, no exit hook, no abort hook, no cleanup. 1867void os::die() { 1868 ::abort(); // dump core (for debugging) 1869} 1870 1871// unused 1872void os::set_error_file(const char *logfile) {} 1873 1874// DLL functions 1875 1876const char* os::dll_file_extension() { return ".so"; } 1877 1878// This must be hard coded because it's the system's temporary 1879// directory not the java application's temp directory, ala java.io.tmpdir. 1880const char* os::get_temp_directory() { return "/tmp"; } 1881 1882static bool file_exists(const char* filename) { 1883 struct stat statbuf; 1884 if (filename == NULL || strlen(filename) == 0) { 1885 return false; 1886 } 1887 return os::stat(filename, &statbuf) == 0; 1888} 1889 1890bool os::dll_build_name(char* buffer, size_t buflen, 1891 const char* pname, const char* fname) { 1892 bool retval = false; 1893 const size_t pnamelen = pname ? strlen(pname) : 0; 1894 1895 // Return error on buffer overflow. 1896 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1897 return retval; 1898 } 1899 1900 if (pnamelen == 0) { 1901 snprintf(buffer, buflen, "lib%s.so", fname); 1902 retval = true; 1903 } else if (strchr(pname, *os::path_separator()) != NULL) { 1904 int n; 1905 char** pelements = split_path(pname, &n); 1906 if (pelements == NULL) { 1907 return false; 1908 } 1909 for (int i = 0 ; i < n ; i++) { 1910 // really shouldn't be NULL but what the heck, check can't hurt 1911 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1912 continue; // skip the empty path values 1913 } 1914 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1915 if (file_exists(buffer)) { 1916 retval = true; 1917 break; 1918 } 1919 } 1920 // release the storage 1921 for (int i = 0 ; i < n ; i++) { 1922 if (pelements[i] != NULL) { 1923 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1924 } 1925 } 1926 if (pelements != NULL) { 1927 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1928 } 1929 } else { 1930 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1931 retval = true; 1932 } 1933 return retval; 1934} 1935 1936const char* os::get_current_directory(char *buf, int buflen) { 1937 return getcwd(buf, buflen); 1938} 1939 1940// check if addr is inside libjvm.so 1941bool os::address_is_in_vm(address addr) { 1942 static address libjvm_base_addr; 1943 Dl_info dlinfo; 1944 1945 if (libjvm_base_addr == NULL) { 1946 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1947 libjvm_base_addr = (address)dlinfo.dli_fbase; 1948 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1949 } 1950 1951 if (dladdr((void *)addr, &dlinfo)) { 1952 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1953 } 1954 1955 return false; 1956} 1957 1958typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1959static dladdr1_func_type dladdr1_func = NULL; 1960 1961bool os::dll_address_to_function_name(address addr, char *buf, 1962 int buflen, int * offset) { 1963 Dl_info dlinfo; 1964 1965 // dladdr1_func was initialized in os::init() 1966 if (dladdr1_func){ 1967 // yes, we have dladdr1 1968 1969 // Support for dladdr1 is checked at runtime; it may be 1970 // available even if the vm is built on a machine that does 1971 // not have dladdr1 support. Make sure there is a value for 1972 // RTLD_DL_SYMENT. 1973 #ifndef RTLD_DL_SYMENT 1974 #define RTLD_DL_SYMENT 1 1975 #endif 1976#ifdef _LP64 1977 Elf64_Sym * info; 1978#else 1979 Elf32_Sym * info; 1980#endif 1981 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1982 RTLD_DL_SYMENT)) { 1983 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1984 if (buf != NULL) { 1985 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1986 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1987 } 1988 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1989 return true; 1990 } 1991 } 1992 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1993 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1994 buf, buflen, offset, dlinfo.dli_fname)) { 1995 return true; 1996 } 1997 } 1998 if (buf != NULL) buf[0] = '\0'; 1999 if (offset != NULL) *offset = -1; 2000 return false; 2001 } else { 2002 // no, only dladdr is available 2003 if (dladdr((void *)addr, &dlinfo)) { 2004 if (buf != NULL) { 2005 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2006 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2007 } 2008 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2009 return true; 2010 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2011 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2012 buf, buflen, offset, dlinfo.dli_fname)) { 2013 return true; 2014 } 2015 } 2016 if (buf != NULL) buf[0] = '\0'; 2017 if (offset != NULL) *offset = -1; 2018 return false; 2019 } 2020} 2021 2022bool os::dll_address_to_library_name(address addr, char* buf, 2023 int buflen, int* offset) { 2024 Dl_info dlinfo; 2025 2026 if (dladdr((void*)addr, &dlinfo)){ 2027 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2028 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2029 return true; 2030 } else { 2031 if (buf) buf[0] = '\0'; 2032 if (offset) *offset = -1; 2033 return false; 2034 } 2035} 2036 2037// Prints the names and full paths of all opened dynamic libraries 2038// for current process 2039void os::print_dll_info(outputStream * st) { 2040 Dl_info dli; 2041 void *handle; 2042 Link_map *map; 2043 Link_map *p; 2044 2045 st->print_cr("Dynamic libraries:"); st->flush(); 2046 2047 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2048 st->print_cr("Error: Cannot print dynamic libraries."); 2049 return; 2050 } 2051 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2052 if (handle == NULL) { 2053 st->print_cr("Error: Cannot print dynamic libraries."); 2054 return; 2055 } 2056 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2057 if (map == NULL) { 2058 st->print_cr("Error: Cannot print dynamic libraries."); 2059 return; 2060 } 2061 2062 while (map->l_prev != NULL) 2063 map = map->l_prev; 2064 2065 while (map != NULL) { 2066 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2067 map = map->l_next; 2068 } 2069 2070 dlclose(handle); 2071} 2072 2073 // Loads .dll/.so and 2074 // in case of error it checks if .dll/.so was built for the 2075 // same architecture as Hotspot is running on 2076 2077void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2078{ 2079 void * result= ::dlopen(filename, RTLD_LAZY); 2080 if (result != NULL) { 2081 // Successful loading 2082 return result; 2083 } 2084 2085 Elf32_Ehdr elf_head; 2086 2087 // Read system error message into ebuf 2088 // It may or may not be overwritten below 2089 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2090 ebuf[ebuflen-1]='\0'; 2091 int diag_msg_max_length=ebuflen-strlen(ebuf); 2092 char* diag_msg_buf=ebuf+strlen(ebuf); 2093 2094 if (diag_msg_max_length==0) { 2095 // No more space in ebuf for additional diagnostics message 2096 return NULL; 2097 } 2098 2099 2100 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2101 2102 if (file_descriptor < 0) { 2103 // Can't open library, report dlerror() message 2104 return NULL; 2105 } 2106 2107 bool failed_to_read_elf_head= 2108 (sizeof(elf_head)!= 2109 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2110 2111 ::close(file_descriptor); 2112 if (failed_to_read_elf_head) { 2113 // file i/o error - report dlerror() msg 2114 return NULL; 2115 } 2116 2117 typedef struct { 2118 Elf32_Half code; // Actual value as defined in elf.h 2119 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2120 char elf_class; // 32 or 64 bit 2121 char endianess; // MSB or LSB 2122 char* name; // String representation 2123 } arch_t; 2124 2125 static const arch_t arch_array[]={ 2126 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2127 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2128 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2129 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2130 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2131 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2132 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2133 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2134 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2135 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2136 }; 2137 2138 #if (defined IA32) 2139 static Elf32_Half running_arch_code=EM_386; 2140 #elif (defined AMD64) 2141 static Elf32_Half running_arch_code=EM_X86_64; 2142 #elif (defined IA64) 2143 static Elf32_Half running_arch_code=EM_IA_64; 2144 #elif (defined __sparc) && (defined _LP64) 2145 static Elf32_Half running_arch_code=EM_SPARCV9; 2146 #elif (defined __sparc) && (!defined _LP64) 2147 static Elf32_Half running_arch_code=EM_SPARC; 2148 #elif (defined __powerpc64__) 2149 static Elf32_Half running_arch_code=EM_PPC64; 2150 #elif (defined __powerpc__) 2151 static Elf32_Half running_arch_code=EM_PPC; 2152 #elif (defined ARM) 2153 static Elf32_Half running_arch_code=EM_ARM; 2154 #else 2155 #error Method os::dll_load requires that one of following is defined:\ 2156 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2157 #endif 2158 2159 // Identify compatability class for VM's architecture and library's architecture 2160 // Obtain string descriptions for architectures 2161 2162 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2163 int running_arch_index=-1; 2164 2165 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2166 if (running_arch_code == arch_array[i].code) { 2167 running_arch_index = i; 2168 } 2169 if (lib_arch.code == arch_array[i].code) { 2170 lib_arch.compat_class = arch_array[i].compat_class; 2171 lib_arch.name = arch_array[i].name; 2172 } 2173 } 2174 2175 assert(running_arch_index != -1, 2176 "Didn't find running architecture code (running_arch_code) in arch_array"); 2177 if (running_arch_index == -1) { 2178 // Even though running architecture detection failed 2179 // we may still continue with reporting dlerror() message 2180 return NULL; 2181 } 2182 2183 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2184 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2185 return NULL; 2186 } 2187 2188 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2189 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2190 return NULL; 2191 } 2192 2193 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2194 if ( lib_arch.name!=NULL ) { 2195 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2196 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2197 lib_arch.name, arch_array[running_arch_index].name); 2198 } else { 2199 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2200 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2201 lib_arch.code, 2202 arch_array[running_arch_index].name); 2203 } 2204 } 2205 2206 return NULL; 2207} 2208 2209void* os::dll_lookup(void* handle, const char* name) { 2210 return dlsym(handle, name); 2211} 2212 2213int os::stat(const char *path, struct stat *sbuf) { 2214 char pathbuf[MAX_PATH]; 2215 if (strlen(path) > MAX_PATH - 1) { 2216 errno = ENAMETOOLONG; 2217 return -1; 2218 } 2219 os::native_path(strcpy(pathbuf, path)); 2220 return ::stat(pathbuf, sbuf); 2221} 2222 2223static bool _print_ascii_file(const char* filename, outputStream* st) { 2224 int fd = ::open(filename, O_RDONLY); 2225 if (fd == -1) { 2226 return false; 2227 } 2228 2229 char buf[32]; 2230 int bytes; 2231 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2232 st->print_raw(buf, bytes); 2233 } 2234 2235 ::close(fd); 2236 2237 return true; 2238} 2239 2240void os::print_os_info_brief(outputStream* st) { 2241 os::Solaris::print_distro_info(st); 2242 2243 os::Posix::print_uname_info(st); 2244 2245 os::Solaris::print_libversion_info(st); 2246} 2247 2248void os::print_os_info(outputStream* st) { 2249 st->print("OS:"); 2250 2251 os::Solaris::print_distro_info(st); 2252 2253 os::Posix::print_uname_info(st); 2254 2255 os::Solaris::print_libversion_info(st); 2256 2257 os::Posix::print_rlimit_info(st); 2258 2259 os::Posix::print_load_average(st); 2260} 2261 2262void os::Solaris::print_distro_info(outputStream* st) { 2263 if (!_print_ascii_file("/etc/release", st)) { 2264 st->print("Solaris"); 2265 } 2266 st->cr(); 2267} 2268 2269void os::Solaris::print_libversion_info(outputStream* st) { 2270 if (os::Solaris::T2_libthread()) { 2271 st->print(" (T2 libthread)"); 2272 } 2273 else { 2274 st->print(" (T1 libthread)"); 2275 } 2276 st->cr(); 2277} 2278 2279static bool check_addr0(outputStream* st) { 2280 jboolean status = false; 2281 int fd = ::open("/proc/self/map",O_RDONLY); 2282 if (fd >= 0) { 2283 prmap_t p; 2284 while(::read(fd, &p, sizeof(p)) > 0) { 2285 if (p.pr_vaddr == 0x0) { 2286 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2287 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2288 st->print("Access:"); 2289 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2290 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2291 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2292 st->cr(); 2293 status = true; 2294 } 2295 ::close(fd); 2296 } 2297 } 2298 return status; 2299} 2300 2301void os::pd_print_cpu_info(outputStream* st) { 2302 // Nothing to do for now. 2303} 2304 2305void os::print_memory_info(outputStream* st) { 2306 st->print("Memory:"); 2307 st->print(" %dk page", os::vm_page_size()>>10); 2308 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2309 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2310 st->cr(); 2311 (void) check_addr0(st); 2312} 2313 2314// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2315// but they're the same for all the solaris architectures that we support. 2316const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2317 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2318 "ILL_COPROC", "ILL_BADSTK" }; 2319 2320const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2321 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2322 "FPE_FLTINV", "FPE_FLTSUB" }; 2323 2324const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2325 2326const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2327 2328void os::print_siginfo(outputStream* st, void* siginfo) { 2329 st->print("siginfo:"); 2330 2331 const int buflen = 100; 2332 char buf[buflen]; 2333 siginfo_t *si = (siginfo_t*)siginfo; 2334 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2335 char *err = strerror(si->si_errno); 2336 if (si->si_errno != 0 && err != NULL) { 2337 st->print("si_errno=%s", err); 2338 } else { 2339 st->print("si_errno=%d", si->si_errno); 2340 } 2341 const int c = si->si_code; 2342 assert(c > 0, "unexpected si_code"); 2343 switch (si->si_signo) { 2344 case SIGILL: 2345 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2346 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2347 break; 2348 case SIGFPE: 2349 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2350 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2351 break; 2352 case SIGSEGV: 2353 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2354 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2355 break; 2356 case SIGBUS: 2357 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2358 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2359 break; 2360 default: 2361 st->print(", si_code=%d", si->si_code); 2362 // no si_addr 2363 } 2364 2365 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2366 UseSharedSpaces) { 2367 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2368 if (mapinfo->is_in_shared_space(si->si_addr)) { 2369 st->print("\n\nError accessing class data sharing archive." \ 2370 " Mapped file inaccessible during execution, " \ 2371 " possible disk/network problem."); 2372 } 2373 } 2374 st->cr(); 2375} 2376 2377// Moved from whole group, because we need them here for diagnostic 2378// prints. 2379#define OLDMAXSIGNUM 32 2380static int Maxsignum = 0; 2381static int *ourSigFlags = NULL; 2382 2383extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2384 2385int os::Solaris::get_our_sigflags(int sig) { 2386 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2387 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2388 return ourSigFlags[sig]; 2389} 2390 2391void os::Solaris::set_our_sigflags(int sig, int flags) { 2392 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2393 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2394 ourSigFlags[sig] = flags; 2395} 2396 2397 2398static const char* get_signal_handler_name(address handler, 2399 char* buf, int buflen) { 2400 int offset; 2401 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2402 if (found) { 2403 // skip directory names 2404 const char *p1, *p2; 2405 p1 = buf; 2406 size_t len = strlen(os::file_separator()); 2407 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2408 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2409 } else { 2410 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2411 } 2412 return buf; 2413} 2414 2415static void print_signal_handler(outputStream* st, int sig, 2416 char* buf, size_t buflen) { 2417 struct sigaction sa; 2418 2419 sigaction(sig, NULL, &sa); 2420 2421 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2422 2423 address handler = (sa.sa_flags & SA_SIGINFO) 2424 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2425 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2426 2427 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2428 st->print("SIG_DFL"); 2429 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2430 st->print("SIG_IGN"); 2431 } else { 2432 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2433 } 2434 2435 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2436 2437 address rh = VMError::get_resetted_sighandler(sig); 2438 // May be, handler was resetted by VMError? 2439 if(rh != NULL) { 2440 handler = rh; 2441 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2442 } 2443 2444 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2445 2446 // Check: is it our handler? 2447 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2448 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2449 // It is our signal handler 2450 // check for flags 2451 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2452 st->print( 2453 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2454 os::Solaris::get_our_sigflags(sig)); 2455 } 2456 } 2457 st->cr(); 2458} 2459 2460void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2461 st->print_cr("Signal Handlers:"); 2462 print_signal_handler(st, SIGSEGV, buf, buflen); 2463 print_signal_handler(st, SIGBUS , buf, buflen); 2464 print_signal_handler(st, SIGFPE , buf, buflen); 2465 print_signal_handler(st, SIGPIPE, buf, buflen); 2466 print_signal_handler(st, SIGXFSZ, buf, buflen); 2467 print_signal_handler(st, SIGILL , buf, buflen); 2468 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2469 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2470 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2471 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2472 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2473 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2474 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2475 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2476} 2477 2478static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2479 2480// Find the full path to the current module, libjvm.so 2481void os::jvm_path(char *buf, jint buflen) { 2482 // Error checking. 2483 if (buflen < MAXPATHLEN) { 2484 assert(false, "must use a large-enough buffer"); 2485 buf[0] = '\0'; 2486 return; 2487 } 2488 // Lazy resolve the path to current module. 2489 if (saved_jvm_path[0] != 0) { 2490 strcpy(buf, saved_jvm_path); 2491 return; 2492 } 2493 2494 Dl_info dlinfo; 2495 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2496 assert(ret != 0, "cannot locate libjvm"); 2497 realpath((char *)dlinfo.dli_fname, buf); 2498 2499 if (Arguments::created_by_gamma_launcher()) { 2500 // Support for the gamma launcher. Typical value for buf is 2501 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2502 // the right place in the string, then assume we are installed in a JDK and 2503 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2504 // up the path so it looks like libjvm.so is installed there (append a 2505 // fake suffix hotspot/libjvm.so). 2506 const char *p = buf + strlen(buf) - 1; 2507 for (int count = 0; p > buf && count < 5; ++count) { 2508 for (--p; p > buf && *p != '/'; --p) 2509 /* empty */ ; 2510 } 2511 2512 if (strncmp(p, "/jre/lib/", 9) != 0) { 2513 // Look for JAVA_HOME in the environment. 2514 char* java_home_var = ::getenv("JAVA_HOME"); 2515 if (java_home_var != NULL && java_home_var[0] != 0) { 2516 char cpu_arch[12]; 2517 char* jrelib_p; 2518 int len; 2519 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2520#ifdef _LP64 2521 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2522 if (strcmp(cpu_arch, "sparc") == 0) { 2523 strcat(cpu_arch, "v9"); 2524 } else if (strcmp(cpu_arch, "i386") == 0) { 2525 strcpy(cpu_arch, "amd64"); 2526 } 2527#endif 2528 // Check the current module name "libjvm.so". 2529 p = strrchr(buf, '/'); 2530 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2531 2532 realpath(java_home_var, buf); 2533 // determine if this is a legacy image or modules image 2534 // modules image doesn't have "jre" subdirectory 2535 len = strlen(buf); 2536 jrelib_p = buf + len; 2537 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2538 if (0 != access(buf, F_OK)) { 2539 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2540 } 2541 2542 if (0 == access(buf, F_OK)) { 2543 // Use current module name "libjvm.so" 2544 len = strlen(buf); 2545 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2546 } else { 2547 // Go back to path of .so 2548 realpath((char *)dlinfo.dli_fname, buf); 2549 } 2550 } 2551 } 2552 } 2553 2554 strcpy(saved_jvm_path, buf); 2555} 2556 2557 2558void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2559 // no prefix required, not even "_" 2560} 2561 2562 2563void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2564 // no suffix required 2565} 2566 2567// This method is a copy of JDK's sysGetLastErrorString 2568// from src/solaris/hpi/src/system_md.c 2569 2570size_t os::lasterror(char *buf, size_t len) { 2571 2572 if (errno == 0) return 0; 2573 2574 const char *s = ::strerror(errno); 2575 size_t n = ::strlen(s); 2576 if (n >= len) { 2577 n = len - 1; 2578 } 2579 ::strncpy(buf, s, n); 2580 buf[n] = '\0'; 2581 return n; 2582} 2583 2584 2585// sun.misc.Signal 2586 2587extern "C" { 2588 static void UserHandler(int sig, void *siginfo, void *context) { 2589 // Ctrl-C is pressed during error reporting, likely because the error 2590 // handler fails to abort. Let VM die immediately. 2591 if (sig == SIGINT && is_error_reported()) { 2592 os::die(); 2593 } 2594 2595 os::signal_notify(sig); 2596 // We do not need to reinstate the signal handler each time... 2597 } 2598} 2599 2600void* os::user_handler() { 2601 return CAST_FROM_FN_PTR(void*, UserHandler); 2602} 2603 2604extern "C" { 2605 typedef void (*sa_handler_t)(int); 2606 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2607} 2608 2609void* os::signal(int signal_number, void* handler) { 2610 struct sigaction sigAct, oldSigAct; 2611 sigfillset(&(sigAct.sa_mask)); 2612 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2613 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2614 2615 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2616 // -1 means registration failed 2617 return (void *)-1; 2618 2619 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2620} 2621 2622void os::signal_raise(int signal_number) { 2623 raise(signal_number); 2624} 2625 2626/* 2627 * The following code is moved from os.cpp for making this 2628 * code platform specific, which it is by its very nature. 2629 */ 2630 2631// a counter for each possible signal value 2632static int Sigexit = 0; 2633static int Maxlibjsigsigs; 2634static jint *pending_signals = NULL; 2635static int *preinstalled_sigs = NULL; 2636static struct sigaction *chainedsigactions = NULL; 2637static sema_t sig_sem; 2638typedef int (*version_getting_t)(); 2639version_getting_t os::Solaris::get_libjsig_version = NULL; 2640static int libjsigversion = NULL; 2641 2642int os::sigexitnum_pd() { 2643 assert(Sigexit > 0, "signal memory not yet initialized"); 2644 return Sigexit; 2645} 2646 2647void os::Solaris::init_signal_mem() { 2648 // Initialize signal structures 2649 Maxsignum = SIGRTMAX; 2650 Sigexit = Maxsignum+1; 2651 assert(Maxsignum >0, "Unable to obtain max signal number"); 2652 2653 Maxlibjsigsigs = Maxsignum; 2654 2655 // pending_signals has one int per signal 2656 // The additional signal is for SIGEXIT - exit signal to signal_thread 2657 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2658 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2659 2660 if (UseSignalChaining) { 2661 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2662 * (Maxsignum + 1), mtInternal); 2663 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2664 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2665 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2666 } 2667 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal); 2668 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2669} 2670 2671void os::signal_init_pd() { 2672 int ret; 2673 2674 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2675 assert(ret == 0, "sema_init() failed"); 2676} 2677 2678void os::signal_notify(int signal_number) { 2679 int ret; 2680 2681 Atomic::inc(&pending_signals[signal_number]); 2682 ret = ::sema_post(&sig_sem); 2683 assert(ret == 0, "sema_post() failed"); 2684} 2685 2686static int check_pending_signals(bool wait_for_signal) { 2687 int ret; 2688 while (true) { 2689 for (int i = 0; i < Sigexit + 1; i++) { 2690 jint n = pending_signals[i]; 2691 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2692 return i; 2693 } 2694 } 2695 if (!wait_for_signal) { 2696 return -1; 2697 } 2698 JavaThread *thread = JavaThread::current(); 2699 ThreadBlockInVM tbivm(thread); 2700 2701 bool threadIsSuspended; 2702 do { 2703 thread->set_suspend_equivalent(); 2704 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2705 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2706 ; 2707 assert(ret == 0, "sema_wait() failed"); 2708 2709 // were we externally suspended while we were waiting? 2710 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2711 if (threadIsSuspended) { 2712 // 2713 // The semaphore has been incremented, but while we were waiting 2714 // another thread suspended us. We don't want to continue running 2715 // while suspended because that would surprise the thread that 2716 // suspended us. 2717 // 2718 ret = ::sema_post(&sig_sem); 2719 assert(ret == 0, "sema_post() failed"); 2720 2721 thread->java_suspend_self(); 2722 } 2723 } while (threadIsSuspended); 2724 } 2725} 2726 2727int os::signal_lookup() { 2728 return check_pending_signals(false); 2729} 2730 2731int os::signal_wait() { 2732 return check_pending_signals(true); 2733} 2734 2735//////////////////////////////////////////////////////////////////////////////// 2736// Virtual Memory 2737 2738static int page_size = -1; 2739 2740// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2741// clear this var if support is not available. 2742static bool has_map_align = true; 2743 2744int os::vm_page_size() { 2745 assert(page_size != -1, "must call os::init"); 2746 return page_size; 2747} 2748 2749// Solaris allocates memory by pages. 2750int os::vm_allocation_granularity() { 2751 assert(page_size != -1, "must call os::init"); 2752 return page_size; 2753} 2754 2755bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2756 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2757 size_t size = bytes; 2758 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2759 if (res != NULL) { 2760 if (UseNUMAInterleaving) { 2761 numa_make_global(addr, bytes); 2762 } 2763 return true; 2764 } 2765 return false; 2766} 2767 2768bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2769 bool exec) { 2770 if (commit_memory(addr, bytes, exec)) { 2771 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2772 // If the large page size has been set and the VM 2773 // is using large pages, use the large page size 2774 // if it is smaller than the alignment hint. This is 2775 // a case where the VM wants to use a larger alignment size 2776 // for its own reasons but still want to use large pages 2777 // (which is what matters to setting the mpss range. 2778 size_t page_size = 0; 2779 if (large_page_size() < alignment_hint) { 2780 assert(UseLargePages, "Expected to be here for large page use only"); 2781 page_size = large_page_size(); 2782 } else { 2783 // If the alignment hint is less than the large page 2784 // size, the VM wants a particular alignment (thus the hint) 2785 // for internal reasons. Try to set the mpss range using 2786 // the alignment_hint. 2787 page_size = alignment_hint; 2788 } 2789 // Since this is a hint, ignore any failures. 2790 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2791 } 2792 return true; 2793 } 2794 return false; 2795} 2796 2797// Uncommit the pages in a specified region. 2798void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2799 if (madvise(addr, bytes, MADV_FREE) < 0) { 2800 debug_only(warning("MADV_FREE failed.")); 2801 return; 2802 } 2803} 2804 2805bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2806 return os::commit_memory(addr, size); 2807} 2808 2809bool os::remove_stack_guard_pages(char* addr, size_t size) { 2810 return os::uncommit_memory(addr, size); 2811} 2812 2813// Change the page size in a given range. 2814void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2815 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2816 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2817 if (UseLargePages && UseMPSS) { 2818 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2819 } 2820} 2821 2822// Tell the OS to make the range local to the first-touching LWP 2823void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2824 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2825 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2826 debug_only(warning("MADV_ACCESS_LWP failed.")); 2827 } 2828} 2829 2830// Tell the OS that this range would be accessed from different LWPs. 2831void os::numa_make_global(char *addr, size_t bytes) { 2832 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2833 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2834 debug_only(warning("MADV_ACCESS_MANY failed.")); 2835 } 2836} 2837 2838// Get the number of the locality groups. 2839size_t os::numa_get_groups_num() { 2840 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2841 return n != -1 ? n : 1; 2842} 2843 2844// Get a list of leaf locality groups. A leaf lgroup is group that 2845// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2846// board. An LWP is assigned to one of these groups upon creation. 2847size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2848 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2849 ids[0] = 0; 2850 return 1; 2851 } 2852 int result_size = 0, top = 1, bottom = 0, cur = 0; 2853 for (int k = 0; k < size; k++) { 2854 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2855 (Solaris::lgrp_id_t*)&ids[top], size - top); 2856 if (r == -1) { 2857 ids[0] = 0; 2858 return 1; 2859 } 2860 if (!r) { 2861 // That's a leaf node. 2862 assert (bottom <= cur, "Sanity check"); 2863 // Check if the node has memory 2864 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2865 NULL, 0, LGRP_RSRC_MEM) > 0) { 2866 ids[bottom++] = ids[cur]; 2867 } 2868 } 2869 top += r; 2870 cur++; 2871 } 2872 if (bottom == 0) { 2873 // Handle a situation, when the OS reports no memory available. 2874 // Assume UMA architecture. 2875 ids[0] = 0; 2876 return 1; 2877 } 2878 return bottom; 2879} 2880 2881// Detect the topology change. Typically happens during CPU plugging-unplugging. 2882bool os::numa_topology_changed() { 2883 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2884 if (is_stale != -1 && is_stale) { 2885 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2886 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2887 assert(c != 0, "Failure to initialize LGRP API"); 2888 Solaris::set_lgrp_cookie(c); 2889 return true; 2890 } 2891 return false; 2892} 2893 2894// Get the group id of the current LWP. 2895int os::numa_get_group_id() { 2896 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2897 if (lgrp_id == -1) { 2898 return 0; 2899 } 2900 const int size = os::numa_get_groups_num(); 2901 int *ids = (int*)alloca(size * sizeof(int)); 2902 2903 // Get the ids of all lgroups with memory; r is the count. 2904 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2905 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2906 if (r <= 0) { 2907 return 0; 2908 } 2909 return ids[os::random() % r]; 2910} 2911 2912// Request information about the page. 2913bool os::get_page_info(char *start, page_info* info) { 2914 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2915 uint64_t addr = (uintptr_t)start; 2916 uint64_t outdata[2]; 2917 uint_t validity = 0; 2918 2919 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2920 return false; 2921 } 2922 2923 info->size = 0; 2924 info->lgrp_id = -1; 2925 2926 if ((validity & 1) != 0) { 2927 if ((validity & 2) != 0) { 2928 info->lgrp_id = outdata[0]; 2929 } 2930 if ((validity & 4) != 0) { 2931 info->size = outdata[1]; 2932 } 2933 return true; 2934 } 2935 return false; 2936} 2937 2938// Scan the pages from start to end until a page different than 2939// the one described in the info parameter is encountered. 2940char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2941 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2942 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2943 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2944 uint_t validity[MAX_MEMINFO_CNT]; 2945 2946 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2947 uint64_t p = (uint64_t)start; 2948 while (p < (uint64_t)end) { 2949 addrs[0] = p; 2950 size_t addrs_count = 1; 2951 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2952 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2953 addrs_count++; 2954 } 2955 2956 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2957 return NULL; 2958 } 2959 2960 size_t i = 0; 2961 for (; i < addrs_count; i++) { 2962 if ((validity[i] & 1) != 0) { 2963 if ((validity[i] & 4) != 0) { 2964 if (outdata[types * i + 1] != page_expected->size) { 2965 break; 2966 } 2967 } else 2968 if (page_expected->size != 0) { 2969 break; 2970 } 2971 2972 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2973 if (outdata[types * i] != page_expected->lgrp_id) { 2974 break; 2975 } 2976 } 2977 } else { 2978 return NULL; 2979 } 2980 } 2981 2982 if (i != addrs_count) { 2983 if ((validity[i] & 2) != 0) { 2984 page_found->lgrp_id = outdata[types * i]; 2985 } else { 2986 page_found->lgrp_id = -1; 2987 } 2988 if ((validity[i] & 4) != 0) { 2989 page_found->size = outdata[types * i + 1]; 2990 } else { 2991 page_found->size = 0; 2992 } 2993 return (char*)addrs[i]; 2994 } 2995 2996 p = addrs[addrs_count - 1] + page_size; 2997 } 2998 return end; 2999} 3000 3001bool os::pd_uncommit_memory(char* addr, size_t bytes) { 3002 size_t size = bytes; 3003 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3004 // uncommitted page. Otherwise, the read/write might succeed if we 3005 // have enough swap space to back the physical page. 3006 return 3007 NULL != Solaris::mmap_chunk(addr, size, 3008 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3009 PROT_NONE); 3010} 3011 3012char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3013 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3014 3015 if (b == MAP_FAILED) { 3016 return NULL; 3017 } 3018 return b; 3019} 3020 3021char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3022 char* addr = requested_addr; 3023 int flags = MAP_PRIVATE | MAP_NORESERVE; 3024 3025 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3026 3027 if (fixed) { 3028 flags |= MAP_FIXED; 3029 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3030 flags |= MAP_ALIGN; 3031 addr = (char*) alignment_hint; 3032 } 3033 3034 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3035 // uncommitted page. Otherwise, the read/write might succeed if we 3036 // have enough swap space to back the physical page. 3037 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3038} 3039 3040char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3041 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3042 3043 guarantee(requested_addr == NULL || requested_addr == addr, 3044 "OS failed to return requested mmap address."); 3045 return addr; 3046} 3047 3048// Reserve memory at an arbitrary address, only if that area is 3049// available (and not reserved for something else). 3050 3051char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3052 const int max_tries = 10; 3053 char* base[max_tries]; 3054 size_t size[max_tries]; 3055 3056 // Solaris adds a gap between mmap'ed regions. The size of the gap 3057 // is dependent on the requested size and the MMU. Our initial gap 3058 // value here is just a guess and will be corrected later. 3059 bool had_top_overlap = false; 3060 bool have_adjusted_gap = false; 3061 size_t gap = 0x400000; 3062 3063 // Assert only that the size is a multiple of the page size, since 3064 // that's all that mmap requires, and since that's all we really know 3065 // about at this low abstraction level. If we need higher alignment, 3066 // we can either pass an alignment to this method or verify alignment 3067 // in one of the methods further up the call chain. See bug 5044738. 3068 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3069 3070 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3071 // Give it a try, if the kernel honors the hint we can return immediately. 3072 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3073 3074 volatile int err = errno; 3075 if (addr == requested_addr) { 3076 return addr; 3077 } else if (addr != NULL) { 3078 pd_unmap_memory(addr, bytes); 3079 } 3080 3081 if (PrintMiscellaneous && Verbose) { 3082 char buf[256]; 3083 buf[0] = '\0'; 3084 if (addr == NULL) { 3085 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3086 } 3087 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3088 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3089 "%s", bytes, requested_addr, addr, buf); 3090 } 3091 3092 // Address hint method didn't work. Fall back to the old method. 3093 // In theory, once SNV becomes our oldest supported platform, this 3094 // code will no longer be needed. 3095 // 3096 // Repeatedly allocate blocks until the block is allocated at the 3097 // right spot. Give up after max_tries. 3098 int i; 3099 for (i = 0; i < max_tries; ++i) { 3100 base[i] = reserve_memory(bytes); 3101 3102 if (base[i] != NULL) { 3103 // Is this the block we wanted? 3104 if (base[i] == requested_addr) { 3105 size[i] = bytes; 3106 break; 3107 } 3108 3109 // check that the gap value is right 3110 if (had_top_overlap && !have_adjusted_gap) { 3111 size_t actual_gap = base[i-1] - base[i] - bytes; 3112 if (gap != actual_gap) { 3113 // adjust the gap value and retry the last 2 allocations 3114 assert(i > 0, "gap adjustment code problem"); 3115 have_adjusted_gap = true; // adjust the gap only once, just in case 3116 gap = actual_gap; 3117 if (PrintMiscellaneous && Verbose) { 3118 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3119 } 3120 unmap_memory(base[i], bytes); 3121 unmap_memory(base[i-1], size[i-1]); 3122 i-=2; 3123 continue; 3124 } 3125 } 3126 3127 // Does this overlap the block we wanted? Give back the overlapped 3128 // parts and try again. 3129 // 3130 // There is still a bug in this code: if top_overlap == bytes, 3131 // the overlap is offset from requested region by the value of gap. 3132 // In this case giving back the overlapped part will not work, 3133 // because we'll give back the entire block at base[i] and 3134 // therefore the subsequent allocation will not generate a new gap. 3135 // This could be fixed with a new algorithm that used larger 3136 // or variable size chunks to find the requested region - 3137 // but such a change would introduce additional complications. 3138 // It's rare enough that the planets align for this bug, 3139 // so we'll just wait for a fix for 6204603/5003415 which 3140 // will provide a mmap flag to allow us to avoid this business. 3141 3142 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3143 if (top_overlap >= 0 && top_overlap < bytes) { 3144 had_top_overlap = true; 3145 unmap_memory(base[i], top_overlap); 3146 base[i] += top_overlap; 3147 size[i] = bytes - top_overlap; 3148 } else { 3149 size_t bottom_overlap = base[i] + bytes - requested_addr; 3150 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3151 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3152 warning("attempt_reserve_memory_at: possible alignment bug"); 3153 } 3154 unmap_memory(requested_addr, bottom_overlap); 3155 size[i] = bytes - bottom_overlap; 3156 } else { 3157 size[i] = bytes; 3158 } 3159 } 3160 } 3161 } 3162 3163 // Give back the unused reserved pieces. 3164 3165 for (int j = 0; j < i; ++j) { 3166 if (base[j] != NULL) { 3167 unmap_memory(base[j], size[j]); 3168 } 3169 } 3170 3171 return (i < max_tries) ? requested_addr : NULL; 3172} 3173 3174bool os::pd_release_memory(char* addr, size_t bytes) { 3175 size_t size = bytes; 3176 return munmap(addr, size) == 0; 3177} 3178 3179static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3180 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3181 "addr must be page aligned"); 3182 int retVal = mprotect(addr, bytes, prot); 3183 return retVal == 0; 3184} 3185 3186// Protect memory (Used to pass readonly pages through 3187// JNI GetArray<type>Elements with empty arrays.) 3188// Also, used for serialization page and for compressed oops null pointer 3189// checking. 3190bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3191 bool is_committed) { 3192 unsigned int p = 0; 3193 switch (prot) { 3194 case MEM_PROT_NONE: p = PROT_NONE; break; 3195 case MEM_PROT_READ: p = PROT_READ; break; 3196 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3197 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3198 default: 3199 ShouldNotReachHere(); 3200 } 3201 // is_committed is unused. 3202 return solaris_mprotect(addr, bytes, p); 3203} 3204 3205// guard_memory and unguard_memory only happens within stack guard pages. 3206// Since ISM pertains only to the heap, guard and unguard memory should not 3207/// happen with an ISM region. 3208bool os::guard_memory(char* addr, size_t bytes) { 3209 return solaris_mprotect(addr, bytes, PROT_NONE); 3210} 3211 3212bool os::unguard_memory(char* addr, size_t bytes) { 3213 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3214} 3215 3216// Large page support 3217 3218// UseLargePages is the master flag to enable/disable large page memory. 3219// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3220// effects can be described in the following table: 3221// 3222// UseLargePages UseMPSS UseISM 3223// false * * => UseLargePages is the master switch, turning 3224// it off will turn off both UseMPSS and 3225// UseISM. VM will not use large page memory 3226// regardless the settings of UseMPSS/UseISM. 3227// true false false => Unless future Solaris provides other 3228// mechanism to use large page memory, this 3229// combination is equivalent to -UseLargePages, 3230// VM will not use large page memory 3231// true true false => JVM will use MPSS for large page memory. 3232// This is the default behavior. 3233// true false true => JVM will use ISM for large page memory. 3234// true true true => JVM will use ISM if it is available. 3235// Otherwise, JVM will fall back to MPSS. 3236// Becaues ISM is now available on all 3237// supported Solaris versions, this combination 3238// is equivalent to +UseISM -UseMPSS. 3239 3240static size_t _large_page_size = 0; 3241 3242bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3243 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3244 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3245 // can support multiple page sizes. 3246 3247 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3248 // ISM is only recommended on old Solaris where there is no MPSS support. 3249 // Simply choose a conservative value as default. 3250 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3251 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3252 ARM_ONLY(2 * M); 3253 3254 // ISM is available on all supported Solaris versions 3255 return true; 3256} 3257 3258// Insertion sort for small arrays (descending order). 3259static void insertion_sort_descending(size_t* array, int len) { 3260 for (int i = 0; i < len; i++) { 3261 size_t val = array[i]; 3262 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3263 size_t tmp = array[key]; 3264 array[key] = array[key - 1]; 3265 array[key - 1] = tmp; 3266 } 3267 } 3268} 3269 3270bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3271 const unsigned int usable_count = VM_Version::page_size_count(); 3272 if (usable_count == 1) { 3273 return false; 3274 } 3275 3276 // Find the right getpagesizes interface. When solaris 11 is the minimum 3277 // build platform, getpagesizes() (without the '2') can be called directly. 3278 typedef int (*gps_t)(size_t[], int); 3279 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3280 if (gps_func == NULL) { 3281 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3282 if (gps_func == NULL) { 3283 if (warn) { 3284 warning("MPSS is not supported by the operating system."); 3285 } 3286 return false; 3287 } 3288 } 3289 3290 // Fill the array of page sizes. 3291 int n = (*gps_func)(_page_sizes, page_sizes_max); 3292 assert(n > 0, "Solaris bug?"); 3293 3294 if (n == page_sizes_max) { 3295 // Add a sentinel value (necessary only if the array was completely filled 3296 // since it is static (zeroed at initialization)). 3297 _page_sizes[--n] = 0; 3298 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3299 } 3300 assert(_page_sizes[n] == 0, "missing sentinel"); 3301 trace_page_sizes("available page sizes", _page_sizes, n); 3302 3303 if (n == 1) return false; // Only one page size available. 3304 3305 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3306 // select up to usable_count elements. First sort the array, find the first 3307 // acceptable value, then copy the usable sizes to the top of the array and 3308 // trim the rest. Make sure to include the default page size :-). 3309 // 3310 // A better policy could get rid of the 4M limit by taking the sizes of the 3311 // important VM memory regions (java heap and possibly the code cache) into 3312 // account. 3313 insertion_sort_descending(_page_sizes, n); 3314 const size_t size_limit = 3315 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3316 int beg; 3317 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3318 const int end = MIN2((int)usable_count, n) - 1; 3319 for (int cur = 0; cur < end; ++cur, ++beg) { 3320 _page_sizes[cur] = _page_sizes[beg]; 3321 } 3322 _page_sizes[end] = vm_page_size(); 3323 _page_sizes[end + 1] = 0; 3324 3325 if (_page_sizes[end] > _page_sizes[end - 1]) { 3326 // Default page size is not the smallest; sort again. 3327 insertion_sort_descending(_page_sizes, end + 1); 3328 } 3329 *page_size = _page_sizes[0]; 3330 3331 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3332 return true; 3333} 3334 3335void os::large_page_init() { 3336 if (!UseLargePages) { 3337 UseISM = false; 3338 UseMPSS = false; 3339 return; 3340 } 3341 3342 // print a warning if any large page related flag is specified on command line 3343 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3344 !FLAG_IS_DEFAULT(UseISM) || 3345 !FLAG_IS_DEFAULT(UseMPSS) || 3346 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3347 UseISM = UseISM && 3348 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3349 if (UseISM) { 3350 // ISM disables MPSS to be compatible with old JDK behavior 3351 UseMPSS = false; 3352 _page_sizes[0] = _large_page_size; 3353 _page_sizes[1] = vm_page_size(); 3354 } 3355 3356 UseMPSS = UseMPSS && 3357 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3358 3359 UseLargePages = UseISM || UseMPSS; 3360} 3361 3362bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3363 // Signal to OS that we want large pages for addresses 3364 // from addr, addr + bytes 3365 struct memcntl_mha mpss_struct; 3366 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3367 mpss_struct.mha_pagesize = align; 3368 mpss_struct.mha_flags = 0; 3369 if (memcntl(start, bytes, MC_HAT_ADVISE, 3370 (caddr_t) &mpss_struct, 0, 0) < 0) { 3371 debug_only(warning("Attempt to use MPSS failed.")); 3372 return false; 3373 } 3374 return true; 3375} 3376 3377char* os::reserve_memory_special(size_t size, char* addr, bool exec) { 3378 // "exec" is passed in but not used. Creating the shared image for 3379 // the code cache doesn't have an SHM_X executable permission to check. 3380 assert(UseLargePages && UseISM, "only for ISM large pages"); 3381 3382 char* retAddr = NULL; 3383 int shmid; 3384 key_t ismKey; 3385 3386 bool warn_on_failure = UseISM && 3387 (!FLAG_IS_DEFAULT(UseLargePages) || 3388 !FLAG_IS_DEFAULT(UseISM) || 3389 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3390 ); 3391 char msg[128]; 3392 3393 ismKey = IPC_PRIVATE; 3394 3395 // Create a large shared memory region to attach to based on size. 3396 // Currently, size is the total size of the heap 3397 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3398 if (shmid == -1){ 3399 if (warn_on_failure) { 3400 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3401 warning(msg); 3402 } 3403 return NULL; 3404 } 3405 3406 // Attach to the region 3407 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3408 int err = errno; 3409 3410 // Remove shmid. If shmat() is successful, the actual shared memory segment 3411 // will be deleted when it's detached by shmdt() or when the process 3412 // terminates. If shmat() is not successful this will remove the shared 3413 // segment immediately. 3414 shmctl(shmid, IPC_RMID, NULL); 3415 3416 if (retAddr == (char *) -1) { 3417 if (warn_on_failure) { 3418 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3419 warning(msg); 3420 } 3421 return NULL; 3422 } 3423 if ((retAddr != NULL) && UseNUMAInterleaving) { 3424 numa_make_global(retAddr, size); 3425 } 3426 3427 // The memory is committed 3428 address pc = CALLER_PC; 3429 MemTracker::record_virtual_memory_reserve((address)retAddr, size, pc); 3430 MemTracker::record_virtual_memory_commit((address)retAddr, size, pc); 3431 3432 return retAddr; 3433} 3434 3435bool os::release_memory_special(char* base, size_t bytes) { 3436 // detaching the SHM segment will also delete it, see reserve_memory_special() 3437 int rslt = shmdt(base); 3438 if (rslt == 0) { 3439 MemTracker::record_virtual_memory_uncommit((address)base, bytes); 3440 MemTracker::record_virtual_memory_release((address)base, bytes); 3441 return true; 3442 } else { 3443 return false; 3444 } 3445} 3446 3447size_t os::large_page_size() { 3448 return _large_page_size; 3449} 3450 3451// MPSS allows application to commit large page memory on demand; with ISM 3452// the entire memory region must be allocated as shared memory. 3453bool os::can_commit_large_page_memory() { 3454 return UseISM ? false : true; 3455} 3456 3457bool os::can_execute_large_page_memory() { 3458 return UseISM ? false : true; 3459} 3460 3461static int os_sleep(jlong millis, bool interruptible) { 3462 const jlong limit = INT_MAX; 3463 jlong prevtime; 3464 int res; 3465 3466 while (millis > limit) { 3467 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3468 return res; 3469 millis -= limit; 3470 } 3471 3472 // Restart interrupted polls with new parameters until the proper delay 3473 // has been completed. 3474 3475 prevtime = getTimeMillis(); 3476 3477 while (millis > 0) { 3478 jlong newtime; 3479 3480 if (!interruptible) { 3481 // Following assert fails for os::yield_all: 3482 // assert(!thread->is_Java_thread(), "must not be java thread"); 3483 res = poll(NULL, 0, millis); 3484 } else { 3485 JavaThread *jt = JavaThread::current(); 3486 3487 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3488 os::Solaris::clear_interrupted); 3489 } 3490 3491 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3492 // thread.Interrupt. 3493 3494 // See c/r 6751923. Poll can return 0 before time 3495 // has elapsed if time is set via clock_settime (as NTP does). 3496 // res == 0 if poll timed out (see man poll RETURN VALUES) 3497 // using the logic below checks that we really did 3498 // sleep at least "millis" if not we'll sleep again. 3499 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3500 newtime = getTimeMillis(); 3501 assert(newtime >= prevtime, "time moving backwards"); 3502 /* Doing prevtime and newtime in microseconds doesn't help precision, 3503 and trying to round up to avoid lost milliseconds can result in a 3504 too-short delay. */ 3505 millis -= newtime - prevtime; 3506 if(millis <= 0) 3507 return OS_OK; 3508 prevtime = newtime; 3509 } else 3510 return res; 3511 } 3512 3513 return OS_OK; 3514} 3515 3516// Read calls from inside the vm need to perform state transitions 3517size_t os::read(int fd, void *buf, unsigned int nBytes) { 3518 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3519} 3520 3521size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3522 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3523} 3524 3525int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3526 assert(thread == Thread::current(), "thread consistency check"); 3527 3528 // TODO-FIXME: this should be removed. 3529 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3530 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3531 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3532 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3533 // is fooled into believing that the system is making progress. In the code below we block the 3534 // the watcher thread while safepoint is in progress so that it would not appear as though the 3535 // system is making progress. 3536 if (!Solaris::T2_libthread() && 3537 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3538 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3539 // the entire safepoint, the watcher thread will line up here during the safepoint. 3540 Threads_lock->lock_without_safepoint_check(); 3541 Threads_lock->unlock(); 3542 } 3543 3544 if (thread->is_Java_thread()) { 3545 // This is a JavaThread so we honor the _thread_blocked protocol 3546 // even for sleeps of 0 milliseconds. This was originally done 3547 // as a workaround for bug 4338139. However, now we also do it 3548 // to honor the suspend-equivalent protocol. 3549 3550 JavaThread *jt = (JavaThread *) thread; 3551 ThreadBlockInVM tbivm(jt); 3552 3553 jt->set_suspend_equivalent(); 3554 // cleared by handle_special_suspend_equivalent_condition() or 3555 // java_suspend_self() via check_and_wait_while_suspended() 3556 3557 int ret_code; 3558 if (millis <= 0) { 3559 thr_yield(); 3560 ret_code = 0; 3561 } else { 3562 // The original sleep() implementation did not create an 3563 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3564 // I'm preserving that decision for now. 3565 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3566 3567 ret_code = os_sleep(millis, interruptible); 3568 } 3569 3570 // were we externally suspended while we were waiting? 3571 jt->check_and_wait_while_suspended(); 3572 3573 return ret_code; 3574 } 3575 3576 // non-JavaThread from this point on: 3577 3578 if (millis <= 0) { 3579 thr_yield(); 3580 return 0; 3581 } 3582 3583 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3584 3585 return os_sleep(millis, interruptible); 3586} 3587 3588int os::naked_sleep() { 3589 // %% make the sleep time an integer flag. for now use 1 millisec. 3590 return os_sleep(1, false); 3591} 3592 3593// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3594void os::infinite_sleep() { 3595 while (true) { // sleep forever ... 3596 ::sleep(100); // ... 100 seconds at a time 3597 } 3598} 3599 3600// Used to convert frequent JVM_Yield() to nops 3601bool os::dont_yield() { 3602 if (DontYieldALot) { 3603 static hrtime_t last_time = 0; 3604 hrtime_t diff = getTimeNanos() - last_time; 3605 3606 if (diff < DontYieldALotInterval * 1000000) 3607 return true; 3608 3609 last_time += diff; 3610 3611 return false; 3612 } 3613 else { 3614 return false; 3615 } 3616} 3617 3618// Caveat: Solaris os::yield() causes a thread-state transition whereas 3619// the linux and win32 implementations do not. This should be checked. 3620 3621void os::yield() { 3622 // Yields to all threads with same or greater priority 3623 os::sleep(Thread::current(), 0, false); 3624} 3625 3626// Note that yield semantics are defined by the scheduling class to which 3627// the thread currently belongs. Typically, yield will _not yield to 3628// other equal or higher priority threads that reside on the dispatch queues 3629// of other CPUs. 3630 3631os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3632 3633 3634// On Solaris we found that yield_all doesn't always yield to all other threads. 3635// There have been cases where there is a thread ready to execute but it doesn't 3636// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3637// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3638// SIGWAITING signal which will cause a new lwp to be created. So we count the 3639// number of times yield_all is called in the one loop and increase the sleep 3640// time after 8 attempts. If this fails too we increase the concurrency level 3641// so that the starving thread would get an lwp 3642 3643void os::yield_all(int attempts) { 3644 // Yields to all threads, including threads with lower priorities 3645 if (attempts == 0) { 3646 os::sleep(Thread::current(), 1, false); 3647 } else { 3648 int iterations = attempts % 30; 3649 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3650 // thr_setconcurrency and _getconcurrency make sense only under T1. 3651 int noofLWPS = thr_getconcurrency(); 3652 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3653 thr_setconcurrency(thr_getconcurrency() + 1); 3654 } 3655 } else if (iterations < 25) { 3656 os::sleep(Thread::current(), 1, false); 3657 } else { 3658 os::sleep(Thread::current(), 10, false); 3659 } 3660 } 3661} 3662 3663// Called from the tight loops to possibly influence time-sharing heuristics 3664void os::loop_breaker(int attempts) { 3665 os::yield_all(attempts); 3666} 3667 3668 3669// Interface for setting lwp priorities. If we are using T2 libthread, 3670// which forces the use of BoundThreads or we manually set UseBoundThreads, 3671// all of our threads will be assigned to real lwp's. Using the thr_setprio 3672// function is meaningless in this mode so we must adjust the real lwp's priority 3673// The routines below implement the getting and setting of lwp priorities. 3674// 3675// Note: There are three priority scales used on Solaris. Java priotities 3676// which range from 1 to 10, libthread "thr_setprio" scale which range 3677// from 0 to 127, and the current scheduling class of the process we 3678// are running in. This is typically from -60 to +60. 3679// The setting of the lwp priorities in done after a call to thr_setprio 3680// so Java priorities are mapped to libthread priorities and we map from 3681// the latter to lwp priorities. We don't keep priorities stored in 3682// Java priorities since some of our worker threads want to set priorities 3683// higher than all Java threads. 3684// 3685// For related information: 3686// (1) man -s 2 priocntl 3687// (2) man -s 4 priocntl 3688// (3) man dispadmin 3689// = librt.so 3690// = libthread/common/rtsched.c - thrp_setlwpprio(). 3691// = ps -cL <pid> ... to validate priority. 3692// = sched_get_priority_min and _max 3693// pthread_create 3694// sched_setparam 3695// pthread_setschedparam 3696// 3697// Assumptions: 3698// + We assume that all threads in the process belong to the same 3699// scheduling class. IE. an homogenous process. 3700// + Must be root or in IA group to change change "interactive" attribute. 3701// Priocntl() will fail silently. The only indication of failure is when 3702// we read-back the value and notice that it hasn't changed. 3703// + Interactive threads enter the runq at the head, non-interactive at the tail. 3704// + For RT, change timeslice as well. Invariant: 3705// constant "priority integral" 3706// Konst == TimeSlice * (60-Priority) 3707// Given a priority, compute appropriate timeslice. 3708// + Higher numerical values have higher priority. 3709 3710// sched class attributes 3711typedef struct { 3712 int schedPolicy; // classID 3713 int maxPrio; 3714 int minPrio; 3715} SchedInfo; 3716 3717 3718static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3719 3720#ifdef ASSERT 3721static int ReadBackValidate = 1; 3722#endif 3723static int myClass = 0; 3724static int myMin = 0; 3725static int myMax = 0; 3726static int myCur = 0; 3727static bool priocntl_enable = false; 3728 3729static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3730static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3731 3732// Call the version of priocntl suitable for all supported versions 3733// of Solaris. We need to call through this wrapper so that we can 3734// build on Solaris 9 and run on Solaris 8, 9 and 10. 3735// 3736// This code should be removed if we ever stop supporting Solaris 8 3737// and earlier releases. 3738 3739static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3740typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3741static priocntl_type priocntl_ptr = priocntl_stub; 3742 3743// Stub to set the value of the real pointer, and then call the real 3744// function. 3745 3746static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3747 // Try Solaris 8- name only. 3748 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3749 guarantee(tmp != NULL, "priocntl function not found."); 3750 priocntl_ptr = tmp; 3751 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3752} 3753 3754 3755// lwp_priocntl_init 3756// 3757// Try to determine the priority scale for our process. 3758// 3759// Return errno or 0 if OK. 3760// 3761static 3762int lwp_priocntl_init () 3763{ 3764 int rslt; 3765 pcinfo_t ClassInfo; 3766 pcparms_t ParmInfo; 3767 int i; 3768 3769 if (!UseThreadPriorities) return 0; 3770 3771 // We are using Bound threads, we need to determine our priority ranges 3772 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3773 // If ThreadPriorityPolicy is 1, switch tables 3774 if (ThreadPriorityPolicy == 1) { 3775 for (i = 0 ; i < CriticalPriority+1; i++) 3776 os::java_to_os_priority[i] = prio_policy1[i]; 3777 } 3778 if (UseCriticalJavaThreadPriority) { 3779 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3780 // See set_native_priority() and set_lwp_class_and_priority(). 3781 // Save original MaxPriority mapping in case attempt to 3782 // use critical priority fails. 3783 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3784 // Set negative to distinguish from other priorities 3785 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3786 } 3787 } 3788 // Not using Bound Threads, set to ThreadPolicy 1 3789 else { 3790 for ( i = 0 ; i < CriticalPriority+1; i++ ) { 3791 os::java_to_os_priority[i] = prio_policy1[i]; 3792 } 3793 return 0; 3794 } 3795 3796 // Get IDs for a set of well-known scheduling classes. 3797 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3798 // the system. We should have a loop that iterates over the 3799 // classID values, which are known to be "small" integers. 3800 3801 strcpy(ClassInfo.pc_clname, "TS"); 3802 ClassInfo.pc_cid = -1; 3803 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3804 if (rslt < 0) return errno; 3805 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3806 tsLimits.schedPolicy = ClassInfo.pc_cid; 3807 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3808 tsLimits.minPrio = -tsLimits.maxPrio; 3809 3810 strcpy(ClassInfo.pc_clname, "IA"); 3811 ClassInfo.pc_cid = -1; 3812 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3813 if (rslt < 0) return errno; 3814 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3815 iaLimits.schedPolicy = ClassInfo.pc_cid; 3816 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3817 iaLimits.minPrio = -iaLimits.maxPrio; 3818 3819 strcpy(ClassInfo.pc_clname, "RT"); 3820 ClassInfo.pc_cid = -1; 3821 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3822 if (rslt < 0) return errno; 3823 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3824 rtLimits.schedPolicy = ClassInfo.pc_cid; 3825 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3826 rtLimits.minPrio = 0; 3827 3828 strcpy(ClassInfo.pc_clname, "FX"); 3829 ClassInfo.pc_cid = -1; 3830 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3831 if (rslt < 0) return errno; 3832 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3833 fxLimits.schedPolicy = ClassInfo.pc_cid; 3834 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3835 fxLimits.minPrio = 0; 3836 3837 // Query our "current" scheduling class. 3838 // This will normally be IA, TS or, rarely, FX or RT. 3839 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3840 ParmInfo.pc_cid = PC_CLNULL; 3841 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3842 if (rslt < 0) return errno; 3843 myClass = ParmInfo.pc_cid; 3844 3845 // We now know our scheduling classId, get specific information 3846 // about the class. 3847 ClassInfo.pc_cid = myClass; 3848 ClassInfo.pc_clname[0] = 0; 3849 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3850 if (rslt < 0) return errno; 3851 3852 if (ThreadPriorityVerbose) { 3853 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3854 } 3855 3856 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3857 ParmInfo.pc_cid = PC_CLNULL; 3858 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3859 if (rslt < 0) return errno; 3860 3861 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3862 myMin = rtLimits.minPrio; 3863 myMax = rtLimits.maxPrio; 3864 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3865 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3866 myMin = iaLimits.minPrio; 3867 myMax = iaLimits.maxPrio; 3868 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3869 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3870 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3871 myMin = tsLimits.minPrio; 3872 myMax = tsLimits.maxPrio; 3873 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3874 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3875 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3876 myMin = fxLimits.minPrio; 3877 myMax = fxLimits.maxPrio; 3878 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3879 } else { 3880 // No clue - punt 3881 if (ThreadPriorityVerbose) 3882 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3883 return EINVAL; // no clue, punt 3884 } 3885 3886 if (ThreadPriorityVerbose) { 3887 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3888 } 3889 3890 priocntl_enable = true; // Enable changing priorities 3891 return 0; 3892} 3893 3894#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3895#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3896#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3897#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3898 3899 3900// scale_to_lwp_priority 3901// 3902// Convert from the libthread "thr_setprio" scale to our current 3903// lwp scheduling class scale. 3904// 3905static 3906int scale_to_lwp_priority (int rMin, int rMax, int x) 3907{ 3908 int v; 3909 3910 if (x == 127) return rMax; // avoid round-down 3911 v = (((x*(rMax-rMin)))/128)+rMin; 3912 return v; 3913} 3914 3915 3916// set_lwp_class_and_priority 3917// 3918// Set the class and priority of the lwp. This call should only 3919// be made when using bound threads (T2 threads are bound by default). 3920// 3921int set_lwp_class_and_priority(int ThreadID, int lwpid, 3922 int newPrio, int new_class, bool scale) { 3923 int rslt; 3924 int Actual, Expected, prv; 3925 pcparms_t ParmInfo; // for GET-SET 3926#ifdef ASSERT 3927 pcparms_t ReadBack; // for readback 3928#endif 3929 3930 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3931 // Query current values. 3932 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3933 // Cache "pcparms_t" in global ParmCache. 3934 // TODO: elide set-to-same-value 3935 3936 // If something went wrong on init, don't change priorities. 3937 if ( !priocntl_enable ) { 3938 if (ThreadPriorityVerbose) 3939 tty->print_cr("Trying to set priority but init failed, ignoring"); 3940 return EINVAL; 3941 } 3942 3943 // If lwp hasn't started yet, just return 3944 // the _start routine will call us again. 3945 if ( lwpid <= 0 ) { 3946 if (ThreadPriorityVerbose) { 3947 tty->print_cr ("deferring the set_lwp_class_and_priority of thread " 3948 INTPTR_FORMAT " to %d, lwpid not set", 3949 ThreadID, newPrio); 3950 } 3951 return 0; 3952 } 3953 3954 if (ThreadPriorityVerbose) { 3955 tty->print_cr ("set_lwp_class_and_priority(" 3956 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3957 ThreadID, lwpid, newPrio); 3958 } 3959 3960 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3961 ParmInfo.pc_cid = PC_CLNULL; 3962 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3963 if (rslt < 0) return errno; 3964 3965 int cur_class = ParmInfo.pc_cid; 3966 ParmInfo.pc_cid = (id_t)new_class; 3967 3968 if (new_class == rtLimits.schedPolicy) { 3969 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3970 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3971 rtLimits.maxPrio, newPrio) 3972 : newPrio; 3973 rtInfo->rt_tqsecs = RT_NOCHANGE; 3974 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3975 if (ThreadPriorityVerbose) { 3976 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3977 } 3978 } else if (new_class == iaLimits.schedPolicy) { 3979 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3980 int maxClamped = MIN2(iaLimits.maxPrio, 3981 cur_class == new_class 3982 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3983 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3984 maxClamped, newPrio) 3985 : newPrio; 3986 iaInfo->ia_uprilim = cur_class == new_class 3987 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3988 iaInfo->ia_mode = IA_NOCHANGE; 3989 if (ThreadPriorityVerbose) { 3990 tty->print_cr("IA: [%d...%d] %d->%d\n", 3991 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3992 } 3993 } else if (new_class == tsLimits.schedPolicy) { 3994 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3995 int maxClamped = MIN2(tsLimits.maxPrio, 3996 cur_class == new_class 3997 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3998 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3999 maxClamped, newPrio) 4000 : newPrio; 4001 tsInfo->ts_uprilim = cur_class == new_class 4002 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 4003 if (ThreadPriorityVerbose) { 4004 tty->print_cr("TS: [%d...%d] %d->%d\n", 4005 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 4006 } 4007 } else if (new_class == fxLimits.schedPolicy) { 4008 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 4009 int maxClamped = MIN2(fxLimits.maxPrio, 4010 cur_class == new_class 4011 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 4012 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 4013 maxClamped, newPrio) 4014 : newPrio; 4015 fxInfo->fx_uprilim = cur_class == new_class 4016 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 4017 fxInfo->fx_tqsecs = FX_NOCHANGE; 4018 fxInfo->fx_tqnsecs = FX_NOCHANGE; 4019 if (ThreadPriorityVerbose) { 4020 tty->print_cr("FX: [%d...%d] %d->%d\n", 4021 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 4022 } 4023 } else { 4024 if (ThreadPriorityVerbose) { 4025 tty->print_cr("Unknown new scheduling class %d\n", new_class); 4026 } 4027 return EINVAL; // no clue, punt 4028 } 4029 4030 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 4031 if (ThreadPriorityVerbose && rslt) { 4032 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 4033 } 4034 if (rslt < 0) return errno; 4035 4036#ifdef ASSERT 4037 // Sanity check: read back what we just attempted to set. 4038 // In theory it could have changed in the interim ... 4039 // 4040 // The priocntl system call is tricky. 4041 // Sometimes it'll validate the priority value argument and 4042 // return EINVAL if unhappy. At other times it fails silently. 4043 // Readbacks are prudent. 4044 4045 if (!ReadBackValidate) return 0; 4046 4047 memset(&ReadBack, 0, sizeof(pcparms_t)); 4048 ReadBack.pc_cid = PC_CLNULL; 4049 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 4050 assert(rslt >= 0, "priocntl failed"); 4051 Actual = Expected = 0xBAD; 4052 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 4053 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 4054 Actual = RTPRI(ReadBack)->rt_pri; 4055 Expected = RTPRI(ParmInfo)->rt_pri; 4056 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 4057 Actual = IAPRI(ReadBack)->ia_upri; 4058 Expected = IAPRI(ParmInfo)->ia_upri; 4059 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 4060 Actual = TSPRI(ReadBack)->ts_upri; 4061 Expected = TSPRI(ParmInfo)->ts_upri; 4062 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 4063 Actual = FXPRI(ReadBack)->fx_upri; 4064 Expected = FXPRI(ParmInfo)->fx_upri; 4065 } else { 4066 if (ThreadPriorityVerbose) { 4067 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 4068 ParmInfo.pc_cid); 4069 } 4070 } 4071 4072 if (Actual != Expected) { 4073 if (ThreadPriorityVerbose) { 4074 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4075 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4076 } 4077 } 4078#endif 4079 4080 return 0; 4081} 4082 4083// Solaris only gives access to 128 real priorities at a time, 4084// so we expand Java's ten to fill this range. This would be better 4085// if we dynamically adjusted relative priorities. 4086// 4087// The ThreadPriorityPolicy option allows us to select 2 different 4088// priority scales. 4089// 4090// ThreadPriorityPolicy=0 4091// Since the Solaris' default priority is MaximumPriority, we do not 4092// set a priority lower than Max unless a priority lower than 4093// NormPriority is requested. 4094// 4095// ThreadPriorityPolicy=1 4096// This mode causes the priority table to get filled with 4097// linear values. NormPriority get's mapped to 50% of the 4098// Maximum priority an so on. This will cause VM threads 4099// to get unfair treatment against other Solaris processes 4100// which do not explicitly alter their thread priorities. 4101// 4102 4103int os::java_to_os_priority[CriticalPriority + 1] = { 4104 -99999, // 0 Entry should never be used 4105 4106 0, // 1 MinPriority 4107 32, // 2 4108 64, // 3 4109 4110 96, // 4 4111 127, // 5 NormPriority 4112 127, // 6 4113 4114 127, // 7 4115 127, // 8 4116 127, // 9 NearMaxPriority 4117 4118 127, // 10 MaxPriority 4119 4120 -criticalPrio // 11 CriticalPriority 4121}; 4122 4123OSReturn os::set_native_priority(Thread* thread, int newpri) { 4124 OSThread* osthread = thread->osthread(); 4125 4126 // Save requested priority in case the thread hasn't been started 4127 osthread->set_native_priority(newpri); 4128 4129 // Check for critical priority request 4130 bool fxcritical = false; 4131 if (newpri == -criticalPrio) { 4132 fxcritical = true; 4133 newpri = criticalPrio; 4134 } 4135 4136 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4137 if (!UseThreadPriorities) return OS_OK; 4138 4139 int status = 0; 4140 4141 if (!fxcritical) { 4142 // Use thr_setprio only if we have a priority that thr_setprio understands 4143 status = thr_setprio(thread->osthread()->thread_id(), newpri); 4144 } 4145 4146 if (os::Solaris::T2_libthread() || 4147 (UseBoundThreads && osthread->is_vm_created())) { 4148 int lwp_status = 4149 set_lwp_class_and_priority(osthread->thread_id(), 4150 osthread->lwp_id(), 4151 newpri, 4152 fxcritical ? fxLimits.schedPolicy : myClass, 4153 !fxcritical); 4154 if (lwp_status != 0 && fxcritical) { 4155 // Try again, this time without changing the scheduling class 4156 newpri = java_MaxPriority_to_os_priority; 4157 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 4158 osthread->lwp_id(), 4159 newpri, myClass, false); 4160 } 4161 status |= lwp_status; 4162 } 4163 return (status == 0) ? OS_OK : OS_ERR; 4164} 4165 4166 4167OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4168 int p; 4169 if ( !UseThreadPriorities ) { 4170 *priority_ptr = NormalPriority; 4171 return OS_OK; 4172 } 4173 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4174 if (status != 0) { 4175 return OS_ERR; 4176 } 4177 *priority_ptr = p; 4178 return OS_OK; 4179} 4180 4181 4182// Hint to the underlying OS that a task switch would not be good. 4183// Void return because it's a hint and can fail. 4184void os::hint_no_preempt() { 4185 schedctl_start(schedctl_init()); 4186} 4187 4188void os::interrupt(Thread* thread) { 4189 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4190 4191 OSThread* osthread = thread->osthread(); 4192 4193 int isInterrupted = osthread->interrupted(); 4194 if (!isInterrupted) { 4195 osthread->set_interrupted(true); 4196 OrderAccess::fence(); 4197 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4198 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4199 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4200 ParkEvent * const slp = thread->_SleepEvent ; 4201 if (slp != NULL) slp->unpark() ; 4202 } 4203 4204 // For JSR166: unpark after setting status but before thr_kill -dl 4205 if (thread->is_Java_thread()) { 4206 ((JavaThread*)thread)->parker()->unpark(); 4207 } 4208 4209 // Handle interruptible wait() ... 4210 ParkEvent * const ev = thread->_ParkEvent ; 4211 if (ev != NULL) ev->unpark() ; 4212 4213 // When events are used everywhere for os::sleep, then this thr_kill 4214 // will only be needed if UseVMInterruptibleIO is true. 4215 4216 if (!isInterrupted) { 4217 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4218 assert_status(status == 0, status, "thr_kill"); 4219 4220 // Bump thread interruption counter 4221 RuntimeService::record_thread_interrupt_signaled_count(); 4222 } 4223} 4224 4225 4226bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4227 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4228 4229 OSThread* osthread = thread->osthread(); 4230 4231 bool res = osthread->interrupted(); 4232 4233 // NOTE that since there is no "lock" around these two operations, 4234 // there is the possibility that the interrupted flag will be 4235 // "false" but that the interrupt event will be set. This is 4236 // intentional. The effect of this is that Object.wait() will appear 4237 // to have a spurious wakeup, which is not harmful, and the 4238 // possibility is so rare that it is not worth the added complexity 4239 // to add yet another lock. It has also been recommended not to put 4240 // the interrupted flag into the os::Solaris::Event structure, 4241 // because it hides the issue. 4242 if (res && clear_interrupted) { 4243 osthread->set_interrupted(false); 4244 } 4245 return res; 4246} 4247 4248 4249void os::print_statistics() { 4250} 4251 4252int os::message_box(const char* title, const char* message) { 4253 int i; 4254 fdStream err(defaultStream::error_fd()); 4255 for (i = 0; i < 78; i++) err.print_raw("="); 4256 err.cr(); 4257 err.print_raw_cr(title); 4258 for (i = 0; i < 78; i++) err.print_raw("-"); 4259 err.cr(); 4260 err.print_raw_cr(message); 4261 for (i = 0; i < 78; i++) err.print_raw("="); 4262 err.cr(); 4263 4264 char buf[16]; 4265 // Prevent process from exiting upon "read error" without consuming all CPU 4266 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4267 4268 return buf[0] == 'y' || buf[0] == 'Y'; 4269} 4270 4271// A lightweight implementation that does not suspend the target thread and 4272// thus returns only a hint. Used for profiling only! 4273ExtendedPC os::get_thread_pc(Thread* thread) { 4274 // Make sure that it is called by the watcher and the Threads lock is owned. 4275 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4276 // For now, is only used to profile the VM Thread 4277 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4278 ExtendedPC epc; 4279 4280 GetThreadPC_Callback cb(ProfileVM_lock); 4281 OSThread *osthread = thread->osthread(); 4282 const int time_to_wait = 400; // 400ms wait for initial response 4283 int status = cb.interrupt(thread, time_to_wait); 4284 4285 if (cb.is_done() ) { 4286 epc = cb.addr(); 4287 } else { 4288 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4289 osthread->thread_id(), status);); 4290 // epc is already NULL 4291 } 4292 return epc; 4293} 4294 4295 4296// This does not do anything on Solaris. This is basically a hook for being 4297// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4298void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4299 f(value, method, args, thread); 4300} 4301 4302// This routine may be used by user applications as a "hook" to catch signals. 4303// The user-defined signal handler must pass unrecognized signals to this 4304// routine, and if it returns true (non-zero), then the signal handler must 4305// return immediately. If the flag "abort_if_unrecognized" is true, then this 4306// routine will never retun false (zero), but instead will execute a VM panic 4307// routine kill the process. 4308// 4309// If this routine returns false, it is OK to call it again. This allows 4310// the user-defined signal handler to perform checks either before or after 4311// the VM performs its own checks. Naturally, the user code would be making 4312// a serious error if it tried to handle an exception (such as a null check 4313// or breakpoint) that the VM was generating for its own correct operation. 4314// 4315// This routine may recognize any of the following kinds of signals: 4316// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4317// os::Solaris::SIGasync 4318// It should be consulted by handlers for any of those signals. 4319// It explicitly does not recognize os::Solaris::SIGinterrupt 4320// 4321// The caller of this routine must pass in the three arguments supplied 4322// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4323// field of the structure passed to sigaction(). This routine assumes that 4324// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4325// 4326// Note that the VM will print warnings if it detects conflicting signal 4327// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4328// 4329extern "C" JNIEXPORT int 4330JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 4331 int abort_if_unrecognized); 4332 4333 4334void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4335 int orig_errno = errno; // Preserve errno value over signal handler. 4336 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4337 errno = orig_errno; 4338} 4339 4340/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4341 is needed to provoke threads blocked on IO to return an EINTR 4342 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4343 does NOT participate in signal chaining due to requirement for 4344 NOT setting SA_RESTART to make EINTR work. */ 4345extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4346 if (UseSignalChaining) { 4347 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4348 if (actp && actp->sa_handler) { 4349 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4350 } 4351 } 4352} 4353 4354// This boolean allows users to forward their own non-matching signals 4355// to JVM_handle_solaris_signal, harmlessly. 4356bool os::Solaris::signal_handlers_are_installed = false; 4357 4358// For signal-chaining 4359bool os::Solaris::libjsig_is_loaded = false; 4360typedef struct sigaction *(*get_signal_t)(int); 4361get_signal_t os::Solaris::get_signal_action = NULL; 4362 4363struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4364 struct sigaction *actp = NULL; 4365 4366 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4367 // Retrieve the old signal handler from libjsig 4368 actp = (*get_signal_action)(sig); 4369 } 4370 if (actp == NULL) { 4371 // Retrieve the preinstalled signal handler from jvm 4372 actp = get_preinstalled_handler(sig); 4373 } 4374 4375 return actp; 4376} 4377 4378static bool call_chained_handler(struct sigaction *actp, int sig, 4379 siginfo_t *siginfo, void *context) { 4380 // Call the old signal handler 4381 if (actp->sa_handler == SIG_DFL) { 4382 // It's more reasonable to let jvm treat it as an unexpected exception 4383 // instead of taking the default action. 4384 return false; 4385 } else if (actp->sa_handler != SIG_IGN) { 4386 if ((actp->sa_flags & SA_NODEFER) == 0) { 4387 // automaticlly block the signal 4388 sigaddset(&(actp->sa_mask), sig); 4389 } 4390 4391 sa_handler_t hand; 4392 sa_sigaction_t sa; 4393 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4394 // retrieve the chained handler 4395 if (siginfo_flag_set) { 4396 sa = actp->sa_sigaction; 4397 } else { 4398 hand = actp->sa_handler; 4399 } 4400 4401 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4402 actp->sa_handler = SIG_DFL; 4403 } 4404 4405 // try to honor the signal mask 4406 sigset_t oset; 4407 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4408 4409 // call into the chained handler 4410 if (siginfo_flag_set) { 4411 (*sa)(sig, siginfo, context); 4412 } else { 4413 (*hand)(sig); 4414 } 4415 4416 // restore the signal mask 4417 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4418 } 4419 // Tell jvm's signal handler the signal is taken care of. 4420 return true; 4421} 4422 4423bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4424 bool chained = false; 4425 // signal-chaining 4426 if (UseSignalChaining) { 4427 struct sigaction *actp = get_chained_signal_action(sig); 4428 if (actp != NULL) { 4429 chained = call_chained_handler(actp, sig, siginfo, context); 4430 } 4431 } 4432 return chained; 4433} 4434 4435struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4436 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4437 if (preinstalled_sigs[sig] != 0) { 4438 return &chainedsigactions[sig]; 4439 } 4440 return NULL; 4441} 4442 4443void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4444 4445 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4446 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4447 chainedsigactions[sig] = oldAct; 4448 preinstalled_sigs[sig] = 1; 4449} 4450 4451void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4452 // Check for overwrite. 4453 struct sigaction oldAct; 4454 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4455 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4456 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4457 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4458 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4459 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4460 if (AllowUserSignalHandlers || !set_installed) { 4461 // Do not overwrite; user takes responsibility to forward to us. 4462 return; 4463 } else if (UseSignalChaining) { 4464 if (oktochain) { 4465 // save the old handler in jvm 4466 save_preinstalled_handler(sig, oldAct); 4467 } else { 4468 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4469 } 4470 // libjsig also interposes the sigaction() call below and saves the 4471 // old sigaction on it own. 4472 } else { 4473 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4474 "%#lx for signal %d.", (long)oldhand, sig)); 4475 } 4476 } 4477 4478 struct sigaction sigAct; 4479 sigfillset(&(sigAct.sa_mask)); 4480 sigAct.sa_handler = SIG_DFL; 4481 4482 sigAct.sa_sigaction = signalHandler; 4483 // Handle SIGSEGV on alternate signal stack if 4484 // not using stack banging 4485 if (!UseStackBanging && sig == SIGSEGV) { 4486 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4487 // Interruptible i/o requires SA_RESTART cleared so EINTR 4488 // is returned instead of restarting system calls 4489 } else if (sig == os::Solaris::SIGinterrupt()) { 4490 sigemptyset(&sigAct.sa_mask); 4491 sigAct.sa_handler = NULL; 4492 sigAct.sa_flags = SA_SIGINFO; 4493 sigAct.sa_sigaction = sigINTRHandler; 4494 } else { 4495 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4496 } 4497 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4498 4499 sigaction(sig, &sigAct, &oldAct); 4500 4501 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4502 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4503 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4504} 4505 4506 4507#define DO_SIGNAL_CHECK(sig) \ 4508 if (!sigismember(&check_signal_done, sig)) \ 4509 os::Solaris::check_signal_handler(sig) 4510 4511// This method is a periodic task to check for misbehaving JNI applications 4512// under CheckJNI, we can add any periodic checks here 4513 4514void os::run_periodic_checks() { 4515 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4516 // thereby preventing a NULL checks. 4517 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4518 4519 if (check_signals == false) return; 4520 4521 // SEGV and BUS if overridden could potentially prevent 4522 // generation of hs*.log in the event of a crash, debugging 4523 // such a case can be very challenging, so we absolutely 4524 // check for the following for a good measure: 4525 DO_SIGNAL_CHECK(SIGSEGV); 4526 DO_SIGNAL_CHECK(SIGILL); 4527 DO_SIGNAL_CHECK(SIGFPE); 4528 DO_SIGNAL_CHECK(SIGBUS); 4529 DO_SIGNAL_CHECK(SIGPIPE); 4530 DO_SIGNAL_CHECK(SIGXFSZ); 4531 4532 // ReduceSignalUsage allows the user to override these handlers 4533 // see comments at the very top and jvm_solaris.h 4534 if (!ReduceSignalUsage) { 4535 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4536 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4537 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4538 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4539 } 4540 4541 // See comments above for using JVM1/JVM2 and UseAltSigs 4542 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4543 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4544 4545} 4546 4547typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4548 4549static os_sigaction_t os_sigaction = NULL; 4550 4551void os::Solaris::check_signal_handler(int sig) { 4552 char buf[O_BUFLEN]; 4553 address jvmHandler = NULL; 4554 4555 struct sigaction act; 4556 if (os_sigaction == NULL) { 4557 // only trust the default sigaction, in case it has been interposed 4558 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4559 if (os_sigaction == NULL) return; 4560 } 4561 4562 os_sigaction(sig, (struct sigaction*)NULL, &act); 4563 4564 address thisHandler = (act.sa_flags & SA_SIGINFO) 4565 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4566 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4567 4568 4569 switch(sig) { 4570 case SIGSEGV: 4571 case SIGBUS: 4572 case SIGFPE: 4573 case SIGPIPE: 4574 case SIGXFSZ: 4575 case SIGILL: 4576 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4577 break; 4578 4579 case SHUTDOWN1_SIGNAL: 4580 case SHUTDOWN2_SIGNAL: 4581 case SHUTDOWN3_SIGNAL: 4582 case BREAK_SIGNAL: 4583 jvmHandler = (address)user_handler(); 4584 break; 4585 4586 default: 4587 int intrsig = os::Solaris::SIGinterrupt(); 4588 int asynsig = os::Solaris::SIGasync(); 4589 4590 if (sig == intrsig) { 4591 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4592 } else if (sig == asynsig) { 4593 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4594 } else { 4595 return; 4596 } 4597 break; 4598 } 4599 4600 4601 if (thisHandler != jvmHandler) { 4602 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4603 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4604 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4605 // No need to check this sig any longer 4606 sigaddset(&check_signal_done, sig); 4607 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4608 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4609 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4610 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4611 // No need to check this sig any longer 4612 sigaddset(&check_signal_done, sig); 4613 } 4614 4615 // Print all the signal handler state 4616 if (sigismember(&check_signal_done, sig)) { 4617 print_signal_handlers(tty, buf, O_BUFLEN); 4618 } 4619 4620} 4621 4622void os::Solaris::install_signal_handlers() { 4623 bool libjsigdone = false; 4624 signal_handlers_are_installed = true; 4625 4626 // signal-chaining 4627 typedef void (*signal_setting_t)(); 4628 signal_setting_t begin_signal_setting = NULL; 4629 signal_setting_t end_signal_setting = NULL; 4630 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4631 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4632 if (begin_signal_setting != NULL) { 4633 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4634 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4635 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4636 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4637 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4638 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4639 libjsig_is_loaded = true; 4640 if (os::Solaris::get_libjsig_version != NULL) { 4641 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4642 } 4643 assert(UseSignalChaining, "should enable signal-chaining"); 4644 } 4645 if (libjsig_is_loaded) { 4646 // Tell libjsig jvm is setting signal handlers 4647 (*begin_signal_setting)(); 4648 } 4649 4650 set_signal_handler(SIGSEGV, true, true); 4651 set_signal_handler(SIGPIPE, true, true); 4652 set_signal_handler(SIGXFSZ, true, true); 4653 set_signal_handler(SIGBUS, true, true); 4654 set_signal_handler(SIGILL, true, true); 4655 set_signal_handler(SIGFPE, true, true); 4656 4657 4658 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4659 4660 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4661 // can not register overridable signals which might be > 32 4662 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4663 // Tell libjsig jvm has finished setting signal handlers 4664 (*end_signal_setting)(); 4665 libjsigdone = true; 4666 } 4667 } 4668 4669 // Never ok to chain our SIGinterrupt 4670 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4671 set_signal_handler(os::Solaris::SIGasync(), true, true); 4672 4673 if (libjsig_is_loaded && !libjsigdone) { 4674 // Tell libjsig jvm finishes setting signal handlers 4675 (*end_signal_setting)(); 4676 } 4677 4678 // We don't activate signal checker if libjsig is in place, we trust ourselves 4679 // and if UserSignalHandler is installed all bets are off. 4680 // Log that signal checking is off only if -verbose:jni is specified. 4681 if (CheckJNICalls) { 4682 if (libjsig_is_loaded) { 4683 if (PrintJNIResolving) { 4684 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4685 } 4686 check_signals = false; 4687 } 4688 if (AllowUserSignalHandlers) { 4689 if (PrintJNIResolving) { 4690 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4691 } 4692 check_signals = false; 4693 } 4694 } 4695} 4696 4697 4698void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4699 4700const char * signames[] = { 4701 "SIG0", 4702 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4703 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4704 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4705 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4706 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4707 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4708 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4709 "SIGCANCEL", "SIGLOST" 4710}; 4711 4712const char* os::exception_name(int exception_code, char* buf, size_t size) { 4713 if (0 < exception_code && exception_code <= SIGRTMAX) { 4714 // signal 4715 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4716 jio_snprintf(buf, size, "%s", signames[exception_code]); 4717 } else { 4718 jio_snprintf(buf, size, "SIG%d", exception_code); 4719 } 4720 return buf; 4721 } else { 4722 return NULL; 4723 } 4724} 4725 4726// (Static) wrappers for the new libthread API 4727int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4728int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4729int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4730int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4731int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4732 4733// (Static) wrapper for getisax(2) call. 4734os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4735 4736// (Static) wrappers for the liblgrp API 4737os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4738os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4739os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4740os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4741os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4742os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4743os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4744os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4745os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4746 4747// (Static) wrapper for meminfo() call. 4748os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4749 4750static address resolve_symbol_lazy(const char* name) { 4751 address addr = (address) dlsym(RTLD_DEFAULT, name); 4752 if(addr == NULL) { 4753 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4754 addr = (address) dlsym(RTLD_NEXT, name); 4755 } 4756 return addr; 4757} 4758 4759static address resolve_symbol(const char* name) { 4760 address addr = resolve_symbol_lazy(name); 4761 if(addr == NULL) { 4762 fatal(dlerror()); 4763 } 4764 return addr; 4765} 4766 4767 4768 4769// isT2_libthread() 4770// 4771// Routine to determine if we are currently using the new T2 libthread. 4772// 4773// We determine if we are using T2 by reading /proc/self/lstatus and 4774// looking for a thread with the ASLWP bit set. If we find this status 4775// bit set, we must assume that we are NOT using T2. The T2 team 4776// has approved this algorithm. 4777// 4778// We need to determine if we are running with the new T2 libthread 4779// since setting native thread priorities is handled differently 4780// when using this library. All threads created using T2 are bound 4781// threads. Calling thr_setprio is meaningless in this case. 4782// 4783bool isT2_libthread() { 4784 static prheader_t * lwpArray = NULL; 4785 static int lwpSize = 0; 4786 static int lwpFile = -1; 4787 lwpstatus_t * that; 4788 char lwpName [128]; 4789 bool isT2 = false; 4790 4791#define ADR(x) ((uintptr_t)(x)) 4792#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4793 4794 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4795 if (lwpFile < 0) { 4796 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4797 return false; 4798 } 4799 lwpSize = 16*1024; 4800 for (;;) { 4801 ::lseek64 (lwpFile, 0, SEEK_SET); 4802 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal); 4803 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4804 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4805 break; 4806 } 4807 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4808 // We got a good snapshot - now iterate over the list. 4809 int aslwpcount = 0; 4810 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4811 that = LWPINDEX(lwpArray,i); 4812 if (that->pr_flags & PR_ASLWP) { 4813 aslwpcount++; 4814 } 4815 } 4816 if (aslwpcount == 0) isT2 = true; 4817 break; 4818 } 4819 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4820 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry. 4821 } 4822 4823 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); 4824 ::close (lwpFile); 4825 if (ThreadPriorityVerbose) { 4826 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4827 else tty->print_cr("We are not running with a T2 libthread\n"); 4828 } 4829 return isT2; 4830} 4831 4832 4833void os::Solaris::libthread_init() { 4834 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4835 4836 // Determine if we are running with the new T2 libthread 4837 os::Solaris::set_T2_libthread(isT2_libthread()); 4838 4839 lwp_priocntl_init(); 4840 4841 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4842 if(func == NULL) { 4843 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4844 // Guarantee that this VM is running on an new enough OS (5.6 or 4845 // later) that it will have a new enough libthread.so. 4846 guarantee(func != NULL, "libthread.so is too old."); 4847 } 4848 4849 // Initialize the new libthread getstate API wrappers 4850 func = resolve_symbol("thr_getstate"); 4851 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4852 4853 func = resolve_symbol("thr_setstate"); 4854 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4855 4856 func = resolve_symbol("thr_setmutator"); 4857 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4858 4859 func = resolve_symbol("thr_suspend_mutator"); 4860 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4861 4862 func = resolve_symbol("thr_continue_mutator"); 4863 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4864 4865 int size; 4866 void (*handler_info_func)(address *, int *); 4867 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4868 handler_info_func(&handler_start, &size); 4869 handler_end = handler_start + size; 4870} 4871 4872 4873int_fnP_mutex_tP os::Solaris::_mutex_lock; 4874int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4875int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4876int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4877int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4878int os::Solaris::_mutex_scope = USYNC_THREAD; 4879 4880int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4881int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4882int_fnP_cond_tP os::Solaris::_cond_signal; 4883int_fnP_cond_tP os::Solaris::_cond_broadcast; 4884int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4885int_fnP_cond_tP os::Solaris::_cond_destroy; 4886int os::Solaris::_cond_scope = USYNC_THREAD; 4887 4888void os::Solaris::synchronization_init() { 4889 if(UseLWPSynchronization) { 4890 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4891 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4892 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4893 os::Solaris::set_mutex_init(lwp_mutex_init); 4894 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4895 os::Solaris::set_mutex_scope(USYNC_THREAD); 4896 4897 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4898 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4899 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4900 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4901 os::Solaris::set_cond_init(lwp_cond_init); 4902 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4903 os::Solaris::set_cond_scope(USYNC_THREAD); 4904 } 4905 else { 4906 os::Solaris::set_mutex_scope(USYNC_THREAD); 4907 os::Solaris::set_cond_scope(USYNC_THREAD); 4908 4909 if(UsePthreads) { 4910 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4911 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4912 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4913 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4914 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4915 4916 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4917 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4918 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4919 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4920 os::Solaris::set_cond_init(pthread_cond_default_init); 4921 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4922 } 4923 else { 4924 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4925 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4926 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4927 os::Solaris::set_mutex_init(::mutex_init); 4928 os::Solaris::set_mutex_destroy(::mutex_destroy); 4929 4930 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4931 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4932 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4933 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4934 os::Solaris::set_cond_init(::cond_init); 4935 os::Solaris::set_cond_destroy(::cond_destroy); 4936 } 4937 } 4938} 4939 4940bool os::Solaris::liblgrp_init() { 4941 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4942 if (handle != NULL) { 4943 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4944 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4945 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4946 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4947 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4948 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4949 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4950 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4951 dlsym(handle, "lgrp_cookie_stale"))); 4952 4953 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4954 set_lgrp_cookie(c); 4955 return true; 4956 } 4957 return false; 4958} 4959 4960void os::Solaris::misc_sym_init() { 4961 address func; 4962 4963 // getisax 4964 func = resolve_symbol_lazy("getisax"); 4965 if (func != NULL) { 4966 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4967 } 4968 4969 // meminfo 4970 func = resolve_symbol_lazy("meminfo"); 4971 if (func != NULL) { 4972 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4973 } 4974} 4975 4976uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4977 assert(_getisax != NULL, "_getisax not set"); 4978 return _getisax(array, n); 4979} 4980 4981// Symbol doesn't exist in Solaris 8 pset.h 4982#ifndef PS_MYID 4983#define PS_MYID -3 4984#endif 4985 4986// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4987typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4988static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4989 4990void init_pset_getloadavg_ptr(void) { 4991 pset_getloadavg_ptr = 4992 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4993 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4994 warning("pset_getloadavg function not found"); 4995 } 4996} 4997 4998int os::Solaris::_dev_zero_fd = -1; 4999 5000// this is called _before_ the global arguments have been parsed 5001void os::init(void) { 5002 _initial_pid = getpid(); 5003 5004 max_hrtime = first_hrtime = gethrtime(); 5005 5006 init_random(1234567); 5007 5008 page_size = sysconf(_SC_PAGESIZE); 5009 if (page_size == -1) 5010 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 5011 strerror(errno))); 5012 init_page_sizes((size_t) page_size); 5013 5014 Solaris::initialize_system_info(); 5015 5016 // Initialize misc. symbols as soon as possible, so we can use them 5017 // if we need them. 5018 Solaris::misc_sym_init(); 5019 5020 int fd = ::open("/dev/zero", O_RDWR); 5021 if (fd < 0) { 5022 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 5023 } else { 5024 Solaris::set_dev_zero_fd(fd); 5025 5026 // Close on exec, child won't inherit. 5027 fcntl(fd, F_SETFD, FD_CLOEXEC); 5028 } 5029 5030 clock_tics_per_sec = CLK_TCK; 5031 5032 // check if dladdr1() exists; dladdr1 can provide more information than 5033 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 5034 // and is available on linker patches for 5.7 and 5.8. 5035 // libdl.so must have been loaded, this call is just an entry lookup 5036 void * hdl = dlopen("libdl.so", RTLD_NOW); 5037 if (hdl) 5038 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 5039 5040 // (Solaris only) this switches to calls that actually do locking. 5041 ThreadCritical::initialize(); 5042 5043 main_thread = thr_self(); 5044 5045 // Constant minimum stack size allowed. It must be at least 5046 // the minimum of what the OS supports (thr_min_stack()), and 5047 // enough to allow the thread to get to user bytecode execution. 5048 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 5049 // If the pagesize of the VM is greater than 8K determine the appropriate 5050 // number of initial guard pages. The user can change this with the 5051 // command line arguments, if needed. 5052 if (vm_page_size() > 8*K) { 5053 StackYellowPages = 1; 5054 StackRedPages = 1; 5055 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 5056 } 5057} 5058 5059// To install functions for atexit system call 5060extern "C" { 5061 static void perfMemory_exit_helper() { 5062 perfMemory_exit(); 5063 } 5064} 5065 5066// this is called _after_ the global arguments have been parsed 5067jint os::init_2(void) { 5068 // try to enable extended file IO ASAP, see 6431278 5069 os::Solaris::try_enable_extended_io(); 5070 5071 // Allocate a single page and mark it as readable for safepoint polling. Also 5072 // use this first mmap call to check support for MAP_ALIGN. 5073 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 5074 page_size, 5075 MAP_PRIVATE | MAP_ALIGN, 5076 PROT_READ); 5077 if (polling_page == NULL) { 5078 has_map_align = false; 5079 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 5080 PROT_READ); 5081 } 5082 5083 os::set_polling_page(polling_page); 5084 5085#ifndef PRODUCT 5086 if( Verbose && PrintMiscellaneous ) 5087 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 5088#endif 5089 5090 if (!UseMembar) { 5091 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 5092 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 5093 os::set_memory_serialize_page( mem_serialize_page ); 5094 5095#ifndef PRODUCT 5096 if(Verbose && PrintMiscellaneous) 5097 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 5098#endif 5099} 5100 5101 os::large_page_init(); 5102 5103 // Check minimum allowable stack size for thread creation and to initialize 5104 // the java system classes, including StackOverflowError - depends on page 5105 // size. Add a page for compiler2 recursion in main thread. 5106 // Add in 2*BytesPerWord times page size to account for VM stack during 5107 // class initialization depending on 32 or 64 bit VM. 5108 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 5109 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5110 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5111 5112 size_t threadStackSizeInBytes = ThreadStackSize * K; 5113 if (threadStackSizeInBytes != 0 && 5114 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5115 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5116 os::Solaris::min_stack_allowed/K); 5117 return JNI_ERR; 5118 } 5119 5120 // For 64kbps there will be a 64kb page size, which makes 5121 // the usable default stack size quite a bit less. Increase the 5122 // stack for 64kb (or any > than 8kb) pages, this increases 5123 // virtual memory fragmentation (since we're not creating the 5124 // stack on a power of 2 boundary. The real fix for this 5125 // should be to fix the guard page mechanism. 5126 5127 if (vm_page_size() > 8*K) { 5128 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5129 ? threadStackSizeInBytes + 5130 ((StackYellowPages + StackRedPages) * vm_page_size()) 5131 : 0; 5132 ThreadStackSize = threadStackSizeInBytes/K; 5133 } 5134 5135 // Make the stack size a multiple of the page size so that 5136 // the yellow/red zones can be guarded. 5137 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5138 vm_page_size())); 5139 5140 Solaris::libthread_init(); 5141 5142 if (UseNUMA) { 5143 if (!Solaris::liblgrp_init()) { 5144 UseNUMA = false; 5145 } else { 5146 size_t lgrp_limit = os::numa_get_groups_num(); 5147 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 5148 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5149 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 5150 if (lgrp_num < 2) { 5151 // There's only one locality group, disable NUMA. 5152 UseNUMA = false; 5153 } 5154 } 5155 // ISM is not compatible with the NUMA allocator - it always allocates 5156 // pages round-robin across the lgroups. 5157 if (UseNUMA && UseLargePages && UseISM) { 5158 if (!FLAG_IS_DEFAULT(UseNUMA)) { 5159 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) { 5160 UseLargePages = false; 5161 } else { 5162 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator"); 5163 UseNUMA = false; 5164 } 5165 } else { 5166 UseNUMA = false; 5167 } 5168 } 5169 if (!UseNUMA && ForceNUMA) { 5170 UseNUMA = true; 5171 } 5172 } 5173 5174 Solaris::signal_sets_init(); 5175 Solaris::init_signal_mem(); 5176 Solaris::install_signal_handlers(); 5177 5178 if (libjsigversion < JSIG_VERSION_1_4_1) { 5179 Maxlibjsigsigs = OLDMAXSIGNUM; 5180 } 5181 5182 // initialize synchronization primitives to use either thread or 5183 // lwp synchronization (controlled by UseLWPSynchronization) 5184 Solaris::synchronization_init(); 5185 5186 if (MaxFDLimit) { 5187 // set the number of file descriptors to max. print out error 5188 // if getrlimit/setrlimit fails but continue regardless. 5189 struct rlimit nbr_files; 5190 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5191 if (status != 0) { 5192 if (PrintMiscellaneous && (Verbose || WizardMode)) 5193 perror("os::init_2 getrlimit failed"); 5194 } else { 5195 nbr_files.rlim_cur = nbr_files.rlim_max; 5196 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5197 if (status != 0) { 5198 if (PrintMiscellaneous && (Verbose || WizardMode)) 5199 perror("os::init_2 setrlimit failed"); 5200 } 5201 } 5202 } 5203 5204 // Calculate theoretical max. size of Threads to guard gainst 5205 // artifical out-of-memory situations, where all available address- 5206 // space has been reserved by thread stacks. Default stack size is 1Mb. 5207 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5208 JavaThread::stack_size_at_create() : (1*K*K); 5209 assert(pre_thread_stack_size != 0, "Must have a stack"); 5210 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5211 // we should start doing Virtual Memory banging. Currently when the threads will 5212 // have used all but 200Mb of space. 5213 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5214 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5215 5216 // at-exit methods are called in the reverse order of their registration. 5217 // In Solaris 7 and earlier, atexit functions are called on return from 5218 // main or as a result of a call to exit(3C). There can be only 32 of 5219 // these functions registered and atexit() does not set errno. In Solaris 5220 // 8 and later, there is no limit to the number of functions registered 5221 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5222 // functions are called upon dlclose(3DL) in addition to return from main 5223 // and exit(3C). 5224 5225 if (PerfAllowAtExitRegistration) { 5226 // only register atexit functions if PerfAllowAtExitRegistration is set. 5227 // atexit functions can be delayed until process exit time, which 5228 // can be problematic for embedded VM situations. Embedded VMs should 5229 // call DestroyJavaVM() to assure that VM resources are released. 5230 5231 // note: perfMemory_exit_helper atexit function may be removed in 5232 // the future if the appropriate cleanup code can be added to the 5233 // VM_Exit VMOperation's doit method. 5234 if (atexit(perfMemory_exit_helper) != 0) { 5235 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5236 } 5237 } 5238 5239 // Init pset_loadavg function pointer 5240 init_pset_getloadavg_ptr(); 5241 5242 return JNI_OK; 5243} 5244 5245void os::init_3(void) { 5246 return; 5247} 5248 5249// Mark the polling page as unreadable 5250void os::make_polling_page_unreadable(void) { 5251 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5252 fatal("Could not disable polling page"); 5253}; 5254 5255// Mark the polling page as readable 5256void os::make_polling_page_readable(void) { 5257 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5258 fatal("Could not enable polling page"); 5259}; 5260 5261// OS interface. 5262 5263bool os::check_heap(bool force) { return true; } 5264 5265typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5266static vsnprintf_t sol_vsnprintf = NULL; 5267 5268int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5269 if (!sol_vsnprintf) { 5270 //search for the named symbol in the objects that were loaded after libjvm 5271 void* where = RTLD_NEXT; 5272 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5273 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5274 if (!sol_vsnprintf){ 5275 //search for the named symbol in the objects that were loaded before libjvm 5276 where = RTLD_DEFAULT; 5277 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5278 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5279 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5280 } 5281 } 5282 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5283} 5284 5285 5286// Is a (classpath) directory empty? 5287bool os::dir_is_empty(const char* path) { 5288 DIR *dir = NULL; 5289 struct dirent *ptr; 5290 5291 dir = opendir(path); 5292 if (dir == NULL) return true; 5293 5294 /* Scan the directory */ 5295 bool result = true; 5296 char buf[sizeof(struct dirent) + MAX_PATH]; 5297 struct dirent *dbuf = (struct dirent *) buf; 5298 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5299 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5300 result = false; 5301 } 5302 } 5303 closedir(dir); 5304 return result; 5305} 5306 5307// This code originates from JDK's sysOpen and open64_w 5308// from src/solaris/hpi/src/system_md.c 5309 5310#ifndef O_DELETE 5311#define O_DELETE 0x10000 5312#endif 5313 5314// Open a file. Unlink the file immediately after open returns 5315// if the specified oflag has the O_DELETE flag set. 5316// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5317 5318int os::open(const char *path, int oflag, int mode) { 5319 if (strlen(path) > MAX_PATH - 1) { 5320 errno = ENAMETOOLONG; 5321 return -1; 5322 } 5323 int fd; 5324 int o_delete = (oflag & O_DELETE); 5325 oflag = oflag & ~O_DELETE; 5326 5327 fd = ::open64(path, oflag, mode); 5328 if (fd == -1) return -1; 5329 5330 //If the open succeeded, the file might still be a directory 5331 { 5332 struct stat64 buf64; 5333 int ret = ::fstat64(fd, &buf64); 5334 int st_mode = buf64.st_mode; 5335 5336 if (ret != -1) { 5337 if ((st_mode & S_IFMT) == S_IFDIR) { 5338 errno = EISDIR; 5339 ::close(fd); 5340 return -1; 5341 } 5342 } else { 5343 ::close(fd); 5344 return -1; 5345 } 5346 } 5347 /* 5348 * 32-bit Solaris systems suffer from: 5349 * 5350 * - an historical default soft limit of 256 per-process file 5351 * descriptors that is too low for many Java programs. 5352 * 5353 * - a design flaw where file descriptors created using stdio 5354 * fopen must be less than 256, _even_ when the first limit above 5355 * has been raised. This can cause calls to fopen (but not calls to 5356 * open, for example) to fail mysteriously, perhaps in 3rd party 5357 * native code (although the JDK itself uses fopen). One can hardly 5358 * criticize them for using this most standard of all functions. 5359 * 5360 * We attempt to make everything work anyways by: 5361 * 5362 * - raising the soft limit on per-process file descriptors beyond 5363 * 256 5364 * 5365 * - As of Solaris 10u4, we can request that Solaris raise the 256 5366 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5367 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5368 * 5369 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5370 * workaround the bug by remapping non-stdio file descriptors below 5371 * 256 to ones beyond 256, which is done below. 5372 * 5373 * See: 5374 * 1085341: 32-bit stdio routines should support file descriptors >255 5375 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5376 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5377 * enable_extended_FILE_stdio() in VM initialisation 5378 * Giri Mandalika's blog 5379 * http://technopark02.blogspot.com/2005_05_01_archive.html 5380 */ 5381#ifndef _LP64 5382 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5383 int newfd = ::fcntl(fd, F_DUPFD, 256); 5384 if (newfd != -1) { 5385 ::close(fd); 5386 fd = newfd; 5387 } 5388 } 5389#endif // 32-bit Solaris 5390 /* 5391 * All file descriptors that are opened in the JVM and not 5392 * specifically destined for a subprocess should have the 5393 * close-on-exec flag set. If we don't set it, then careless 3rd 5394 * party native code might fork and exec without closing all 5395 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5396 * UNIXProcess.c), and this in turn might: 5397 * 5398 * - cause end-of-file to fail to be detected on some file 5399 * descriptors, resulting in mysterious hangs, or 5400 * 5401 * - might cause an fopen in the subprocess to fail on a system 5402 * suffering from bug 1085341. 5403 * 5404 * (Yes, the default setting of the close-on-exec flag is a Unix 5405 * design flaw) 5406 * 5407 * See: 5408 * 1085341: 32-bit stdio routines should support file descriptors >255 5409 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5410 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5411 */ 5412#ifdef FD_CLOEXEC 5413 { 5414 int flags = ::fcntl(fd, F_GETFD); 5415 if (flags != -1) 5416 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5417 } 5418#endif 5419 5420 if (o_delete != 0) { 5421 ::unlink(path); 5422 } 5423 return fd; 5424} 5425 5426// create binary file, rewriting existing file if required 5427int os::create_binary_file(const char* path, bool rewrite_existing) { 5428 int oflags = O_WRONLY | O_CREAT; 5429 if (!rewrite_existing) { 5430 oflags |= O_EXCL; 5431 } 5432 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5433} 5434 5435// return current position of file pointer 5436jlong os::current_file_offset(int fd) { 5437 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5438} 5439 5440// move file pointer to the specified offset 5441jlong os::seek_to_file_offset(int fd, jlong offset) { 5442 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5443} 5444 5445jlong os::lseek(int fd, jlong offset, int whence) { 5446 return (jlong) ::lseek64(fd, offset, whence); 5447} 5448 5449char * os::native_path(char *path) { 5450 return path; 5451} 5452 5453int os::ftruncate(int fd, jlong length) { 5454 return ::ftruncate64(fd, length); 5455} 5456 5457int os::fsync(int fd) { 5458 RESTARTABLE_RETURN_INT(::fsync(fd)); 5459} 5460 5461int os::available(int fd, jlong *bytes) { 5462 jlong cur, end; 5463 int mode; 5464 struct stat64 buf64; 5465 5466 if (::fstat64(fd, &buf64) >= 0) { 5467 mode = buf64.st_mode; 5468 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5469 /* 5470 * XXX: is the following call interruptible? If so, this might 5471 * need to go through the INTERRUPT_IO() wrapper as for other 5472 * blocking, interruptible calls in this file. 5473 */ 5474 int n,ioctl_return; 5475 5476 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5477 if (ioctl_return>= 0) { 5478 *bytes = n; 5479 return 1; 5480 } 5481 } 5482 } 5483 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5484 return 0; 5485 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5486 return 0; 5487 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5488 return 0; 5489 } 5490 *bytes = end - cur; 5491 return 1; 5492} 5493 5494// Map a block of memory. 5495char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 5496 char *addr, size_t bytes, bool read_only, 5497 bool allow_exec) { 5498 int prot; 5499 int flags; 5500 5501 if (read_only) { 5502 prot = PROT_READ; 5503 flags = MAP_SHARED; 5504 } else { 5505 prot = PROT_READ | PROT_WRITE; 5506 flags = MAP_PRIVATE; 5507 } 5508 5509 if (allow_exec) { 5510 prot |= PROT_EXEC; 5511 } 5512 5513 if (addr != NULL) { 5514 flags |= MAP_FIXED; 5515 } 5516 5517 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5518 fd, file_offset); 5519 if (mapped_address == MAP_FAILED) { 5520 return NULL; 5521 } 5522 return mapped_address; 5523} 5524 5525 5526// Remap a block of memory. 5527char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5528 char *addr, size_t bytes, bool read_only, 5529 bool allow_exec) { 5530 // same as map_memory() on this OS 5531 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5532 allow_exec); 5533} 5534 5535 5536// Unmap a block of memory. 5537bool os::pd_unmap_memory(char* addr, size_t bytes) { 5538 return munmap(addr, bytes) == 0; 5539} 5540 5541void os::pause() { 5542 char filename[MAX_PATH]; 5543 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5544 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5545 } else { 5546 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5547 } 5548 5549 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5550 if (fd != -1) { 5551 struct stat buf; 5552 ::close(fd); 5553 while (::stat(filename, &buf) == 0) { 5554 (void)::poll(NULL, 0, 100); 5555 } 5556 } else { 5557 jio_fprintf(stderr, 5558 "Could not open pause file '%s', continuing immediately.\n", filename); 5559 } 5560} 5561 5562#ifndef PRODUCT 5563#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5564// Turn this on if you need to trace synch operations. 5565// Set RECORD_SYNCH_LIMIT to a large-enough value, 5566// and call record_synch_enable and record_synch_disable 5567// around the computation of interest. 5568 5569void record_synch(char* name, bool returning); // defined below 5570 5571class RecordSynch { 5572 char* _name; 5573 public: 5574 RecordSynch(char* name) :_name(name) 5575 { record_synch(_name, false); } 5576 ~RecordSynch() { record_synch(_name, true); } 5577}; 5578 5579#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5580extern "C" ret name params { \ 5581 typedef ret name##_t params; \ 5582 static name##_t* implem = NULL; \ 5583 static int callcount = 0; \ 5584 if (implem == NULL) { \ 5585 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5586 if (implem == NULL) fatal(dlerror()); \ 5587 } \ 5588 ++callcount; \ 5589 RecordSynch _rs(#name); \ 5590 inner; \ 5591 return implem args; \ 5592} 5593// in dbx, examine callcounts this way: 5594// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5595 5596#define CHECK_POINTER_OK(p) \ 5597 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5598#define CHECK_MU \ 5599 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5600#define CHECK_CV \ 5601 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5602#define CHECK_P(p) \ 5603 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5604 5605#define CHECK_MUTEX(mutex_op) \ 5606CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5607 5608CHECK_MUTEX( mutex_lock) 5609CHECK_MUTEX( _mutex_lock) 5610CHECK_MUTEX( mutex_unlock) 5611CHECK_MUTEX(_mutex_unlock) 5612CHECK_MUTEX( mutex_trylock) 5613CHECK_MUTEX(_mutex_trylock) 5614 5615#define CHECK_COND(cond_op) \ 5616CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5617 5618CHECK_COND( cond_wait); 5619CHECK_COND(_cond_wait); 5620CHECK_COND(_cond_wait_cancel); 5621 5622#define CHECK_COND2(cond_op) \ 5623CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5624 5625CHECK_COND2( cond_timedwait); 5626CHECK_COND2(_cond_timedwait); 5627CHECK_COND2(_cond_timedwait_cancel); 5628 5629// do the _lwp_* versions too 5630#define mutex_t lwp_mutex_t 5631#define cond_t lwp_cond_t 5632CHECK_MUTEX( _lwp_mutex_lock) 5633CHECK_MUTEX( _lwp_mutex_unlock) 5634CHECK_MUTEX( _lwp_mutex_trylock) 5635CHECK_MUTEX( __lwp_mutex_lock) 5636CHECK_MUTEX( __lwp_mutex_unlock) 5637CHECK_MUTEX( __lwp_mutex_trylock) 5638CHECK_MUTEX(___lwp_mutex_lock) 5639CHECK_MUTEX(___lwp_mutex_unlock) 5640 5641CHECK_COND( _lwp_cond_wait); 5642CHECK_COND( __lwp_cond_wait); 5643CHECK_COND(___lwp_cond_wait); 5644 5645CHECK_COND2( _lwp_cond_timedwait); 5646CHECK_COND2( __lwp_cond_timedwait); 5647#undef mutex_t 5648#undef cond_t 5649 5650CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5651CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5652CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5653CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5654CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5655CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5656CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5657CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5658 5659 5660// recording machinery: 5661 5662enum { RECORD_SYNCH_LIMIT = 200 }; 5663char* record_synch_name[RECORD_SYNCH_LIMIT]; 5664void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5665bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5666thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5667int record_synch_count = 0; 5668bool record_synch_enabled = false; 5669 5670// in dbx, examine recorded data this way: 5671// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5672 5673void record_synch(char* name, bool returning) { 5674 if (record_synch_enabled) { 5675 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5676 record_synch_name[record_synch_count] = name; 5677 record_synch_returning[record_synch_count] = returning; 5678 record_synch_thread[record_synch_count] = thr_self(); 5679 record_synch_arg0ptr[record_synch_count] = &name; 5680 record_synch_count++; 5681 } 5682 // put more checking code here: 5683 // ... 5684 } 5685} 5686 5687void record_synch_enable() { 5688 // start collecting trace data, if not already doing so 5689 if (!record_synch_enabled) record_synch_count = 0; 5690 record_synch_enabled = true; 5691} 5692 5693void record_synch_disable() { 5694 // stop collecting trace data 5695 record_synch_enabled = false; 5696} 5697 5698#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5699#endif // PRODUCT 5700 5701const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5702const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5703 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5704 5705 5706// JVMTI & JVM monitoring and management support 5707// The thread_cpu_time() and current_thread_cpu_time() are only 5708// supported if is_thread_cpu_time_supported() returns true. 5709// They are not supported on Solaris T1. 5710 5711// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5712// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5713// of a thread. 5714// 5715// current_thread_cpu_time() and thread_cpu_time(Thread *) 5716// returns the fast estimate available on the platform. 5717 5718// hrtime_t gethrvtime() return value includes 5719// user time but does not include system time 5720jlong os::current_thread_cpu_time() { 5721 return (jlong) gethrvtime(); 5722} 5723 5724jlong os::thread_cpu_time(Thread *thread) { 5725 // return user level CPU time only to be consistent with 5726 // what current_thread_cpu_time returns. 5727 // thread_cpu_time_info() must be changed if this changes 5728 return os::thread_cpu_time(thread, false /* user time only */); 5729} 5730 5731jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5732 if (user_sys_cpu_time) { 5733 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5734 } else { 5735 return os::current_thread_cpu_time(); 5736 } 5737} 5738 5739jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5740 char proc_name[64]; 5741 int count; 5742 prusage_t prusage; 5743 jlong lwp_time; 5744 int fd; 5745 5746 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5747 getpid(), 5748 thread->osthread()->lwp_id()); 5749 fd = ::open(proc_name, O_RDONLY); 5750 if ( fd == -1 ) return -1; 5751 5752 do { 5753 count = ::pread(fd, 5754 (void *)&prusage.pr_utime, 5755 thr_time_size, 5756 thr_time_off); 5757 } while (count < 0 && errno == EINTR); 5758 ::close(fd); 5759 if ( count < 0 ) return -1; 5760 5761 if (user_sys_cpu_time) { 5762 // user + system CPU time 5763 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5764 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5765 (jlong)prusage.pr_stime.tv_nsec + 5766 (jlong)prusage.pr_utime.tv_nsec; 5767 } else { 5768 // user level CPU time only 5769 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5770 (jlong)prusage.pr_utime.tv_nsec; 5771 } 5772 5773 return(lwp_time); 5774} 5775 5776void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5777 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5778 info_ptr->may_skip_backward = false; // elapsed time not wall time 5779 info_ptr->may_skip_forward = false; // elapsed time not wall time 5780 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5781} 5782 5783void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5784 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5785 info_ptr->may_skip_backward = false; // elapsed time not wall time 5786 info_ptr->may_skip_forward = false; // elapsed time not wall time 5787 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5788} 5789 5790bool os::is_thread_cpu_time_supported() { 5791 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5792 return true; 5793 } else { 5794 return false; 5795 } 5796} 5797 5798// System loadavg support. Returns -1 if load average cannot be obtained. 5799// Return the load average for our processor set if the primitive exists 5800// (Solaris 9 and later). Otherwise just return system wide loadavg. 5801int os::loadavg(double loadavg[], int nelem) { 5802 if (pset_getloadavg_ptr != NULL) { 5803 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5804 } else { 5805 return ::getloadavg(loadavg, nelem); 5806 } 5807} 5808 5809//--------------------------------------------------------------------------------- 5810 5811static address same_page(address x, address y) { 5812 intptr_t page_bits = -os::vm_page_size(); 5813 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5814 return x; 5815 else if (x > y) 5816 return (address)(intptr_t(y) | ~page_bits) + 1; 5817 else 5818 return (address)(intptr_t(y) & page_bits); 5819} 5820 5821bool os::find(address addr, outputStream* st) { 5822 Dl_info dlinfo; 5823 memset(&dlinfo, 0, sizeof(dlinfo)); 5824 if (dladdr(addr, &dlinfo)) { 5825#ifdef _LP64 5826 st->print("0x%016lx: ", addr); 5827#else 5828 st->print("0x%08x: ", addr); 5829#endif 5830 if (dlinfo.dli_sname != NULL) 5831 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5832 else if (dlinfo.dli_fname) 5833 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5834 else 5835 st->print("<absolute address>"); 5836 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5837#ifdef _LP64 5838 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5839#else 5840 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5841#endif 5842 st->cr(); 5843 5844 if (Verbose) { 5845 // decode some bytes around the PC 5846 address begin = same_page(addr-40, addr); 5847 address end = same_page(addr+40, addr); 5848 address lowest = (address) dlinfo.dli_sname; 5849 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5850 if (begin < lowest) begin = lowest; 5851 Dl_info dlinfo2; 5852 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5853 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5854 end = (address) dlinfo2.dli_saddr; 5855 Disassembler::decode(begin, end, st); 5856 } 5857 return true; 5858 } 5859 return false; 5860} 5861 5862// Following function has been added to support HotSparc's libjvm.so running 5863// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5864// src/solaris/hpi/native_threads in the EVM codebase. 5865// 5866// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5867// libraries and should thus be removed. We will leave it behind for a while 5868// until we no longer want to able to run on top of 1.3.0 Solaris production 5869// JDK. See 4341971. 5870 5871#define STACK_SLACK 0x800 5872 5873extern "C" { 5874 intptr_t sysThreadAvailableStackWithSlack() { 5875 stack_t st; 5876 intptr_t retval, stack_top; 5877 retval = thr_stksegment(&st); 5878 assert(retval == 0, "incorrect return value from thr_stksegment"); 5879 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5880 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5881 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5882 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5883 } 5884} 5885 5886// ObjectMonitor park-unpark infrastructure ... 5887// 5888// We implement Solaris and Linux PlatformEvents with the 5889// obvious condvar-mutex-flag triple. 5890// Another alternative that works quite well is pipes: 5891// Each PlatformEvent consists of a pipe-pair. 5892// The thread associated with the PlatformEvent 5893// calls park(), which reads from the input end of the pipe. 5894// Unpark() writes into the other end of the pipe. 5895// The write-side of the pipe must be set NDELAY. 5896// Unfortunately pipes consume a large # of handles. 5897// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5898// Using pipes for the 1st few threads might be workable, however. 5899// 5900// park() is permitted to return spuriously. 5901// Callers of park() should wrap the call to park() in 5902// an appropriate loop. A litmus test for the correct 5903// usage of park is the following: if park() were modified 5904// to immediately return 0 your code should still work, 5905// albeit degenerating to a spin loop. 5906// 5907// An interesting optimization for park() is to use a trylock() 5908// to attempt to acquire the mutex. If the trylock() fails 5909// then we know that a concurrent unpark() operation is in-progress. 5910// in that case the park() code could simply set _count to 0 5911// and return immediately. The subsequent park() operation *might* 5912// return immediately. That's harmless as the caller of park() is 5913// expected to loop. By using trylock() we will have avoided a 5914// avoided a context switch caused by contention on the per-thread mutex. 5915// 5916// TODO-FIXME: 5917// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5918// objectmonitor implementation. 5919// 2. Collapse the JSR166 parker event, and the 5920// objectmonitor ParkEvent into a single "Event" construct. 5921// 3. In park() and unpark() add: 5922// assert (Thread::current() == AssociatedWith). 5923// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5924// 1-out-of-N park() operations will return immediately. 5925// 5926// _Event transitions in park() 5927// -1 => -1 : illegal 5928// 1 => 0 : pass - return immediately 5929// 0 => -1 : block 5930// 5931// _Event serves as a restricted-range semaphore. 5932// 5933// Another possible encoding of _Event would be with 5934// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5935// 5936// TODO-FIXME: add DTRACE probes for: 5937// 1. Tx parks 5938// 2. Ty unparks Tx 5939// 3. Tx resumes from park 5940 5941 5942// value determined through experimentation 5943#define ROUNDINGFIX 11 5944 5945// utility to compute the abstime argument to timedwait. 5946// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5947 5948static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5949 // millis is the relative timeout time 5950 // abstime will be the absolute timeout time 5951 if (millis < 0) millis = 0; 5952 struct timeval now; 5953 int status = gettimeofday(&now, NULL); 5954 assert(status == 0, "gettimeofday"); 5955 jlong seconds = millis / 1000; 5956 jlong max_wait_period; 5957 5958 if (UseLWPSynchronization) { 5959 // forward port of fix for 4275818 (not sleeping long enough) 5960 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5961 // _lwp_cond_timedwait() used a round_down algorithm rather 5962 // than a round_up. For millis less than our roundfactor 5963 // it rounded down to 0 which doesn't meet the spec. 5964 // For millis > roundfactor we may return a bit sooner, but 5965 // since we can not accurately identify the patch level and 5966 // this has already been fixed in Solaris 9 and 8 we will 5967 // leave it alone rather than always rounding down. 5968 5969 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5970 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5971 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5972 max_wait_period = 21000000; 5973 } else { 5974 max_wait_period = 50000000; 5975 } 5976 millis %= 1000; 5977 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5978 seconds = max_wait_period; 5979 } 5980 abstime->tv_sec = now.tv_sec + seconds; 5981 long usec = now.tv_usec + millis * 1000; 5982 if (usec >= 1000000) { 5983 abstime->tv_sec += 1; 5984 usec -= 1000000; 5985 } 5986 abstime->tv_nsec = usec * 1000; 5987 return abstime; 5988} 5989 5990// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5991// Conceptually TryPark() should be equivalent to park(0). 5992 5993int os::PlatformEvent::TryPark() { 5994 for (;;) { 5995 const int v = _Event ; 5996 guarantee ((v == 0) || (v == 1), "invariant") ; 5997 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5998 } 5999} 6000 6001void os::PlatformEvent::park() { // AKA: down() 6002 // Invariant: Only the thread associated with the Event/PlatformEvent 6003 // may call park(). 6004 int v ; 6005 for (;;) { 6006 v = _Event ; 6007 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6008 } 6009 guarantee (v >= 0, "invariant") ; 6010 if (v == 0) { 6011 // Do this the hard way by blocking ... 6012 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6013 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6014 // Only for SPARC >= V8PlusA 6015#if defined(__sparc) && defined(COMPILER2) 6016 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6017#endif 6018 int status = os::Solaris::mutex_lock(_mutex); 6019 assert_status(status == 0, status, "mutex_lock"); 6020 guarantee (_nParked == 0, "invariant") ; 6021 ++ _nParked ; 6022 while (_Event < 0) { 6023 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 6024 // Treat this the same as if the wait was interrupted 6025 // With usr/lib/lwp going to kernel, always handle ETIME 6026 status = os::Solaris::cond_wait(_cond, _mutex); 6027 if (status == ETIME) status = EINTR ; 6028 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 6029 } 6030 -- _nParked ; 6031 _Event = 0 ; 6032 status = os::Solaris::mutex_unlock(_mutex); 6033 assert_status(status == 0, status, "mutex_unlock"); 6034 // Paranoia to ensure our locked and lock-free paths interact 6035 // correctly with each other. 6036 OrderAccess::fence(); 6037 } 6038} 6039 6040int os::PlatformEvent::park(jlong millis) { 6041 guarantee (_nParked == 0, "invariant") ; 6042 int v ; 6043 for (;;) { 6044 v = _Event ; 6045 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6046 } 6047 guarantee (v >= 0, "invariant") ; 6048 if (v != 0) return OS_OK ; 6049 6050 int ret = OS_TIMEOUT; 6051 timestruc_t abst; 6052 compute_abstime (&abst, millis); 6053 6054 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6055 // For Solaris SPARC set fprs.FEF=0 prior to parking. 6056 // Only for SPARC >= V8PlusA 6057#if defined(__sparc) && defined(COMPILER2) 6058 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6059#endif 6060 int status = os::Solaris::mutex_lock(_mutex); 6061 assert_status(status == 0, status, "mutex_lock"); 6062 guarantee (_nParked == 0, "invariant") ; 6063 ++ _nParked ; 6064 while (_Event < 0) { 6065 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 6066 assert_status(status == 0 || status == EINTR || 6067 status == ETIME || status == ETIMEDOUT, 6068 status, "cond_timedwait"); 6069 if (!FilterSpuriousWakeups) break ; // previous semantics 6070 if (status == ETIME || status == ETIMEDOUT) break ; 6071 // We consume and ignore EINTR and spurious wakeups. 6072 } 6073 -- _nParked ; 6074 if (_Event >= 0) ret = OS_OK ; 6075 _Event = 0 ; 6076 status = os::Solaris::mutex_unlock(_mutex); 6077 assert_status(status == 0, status, "mutex_unlock"); 6078 // Paranoia to ensure our locked and lock-free paths interact 6079 // correctly with each other. 6080 OrderAccess::fence(); 6081 return ret; 6082} 6083 6084void os::PlatformEvent::unpark() { 6085 // Transitions for _Event: 6086 // 0 :=> 1 6087 // 1 :=> 1 6088 // -1 :=> either 0 or 1; must signal target thread 6089 // That is, we can safely transition _Event from -1 to either 6090 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 6091 // unpark() calls. 6092 // See also: "Semaphores in Plan 9" by Mullender & Cox 6093 // 6094 // Note: Forcing a transition from "-1" to "1" on an unpark() means 6095 // that it will take two back-to-back park() calls for the owning 6096 // thread to block. This has the benefit of forcing a spurious return 6097 // from the first park() call after an unpark() call which will help 6098 // shake out uses of park() and unpark() without condition variables. 6099 6100 if (Atomic::xchg(1, &_Event) >= 0) return; 6101 6102 // If the thread associated with the event was parked, wake it. 6103 // Wait for the thread assoc with the PlatformEvent to vacate. 6104 int status = os::Solaris::mutex_lock(_mutex); 6105 assert_status(status == 0, status, "mutex_lock"); 6106 int AnyWaiters = _nParked; 6107 status = os::Solaris::mutex_unlock(_mutex); 6108 assert_status(status == 0, status, "mutex_unlock"); 6109 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 6110 if (AnyWaiters != 0) { 6111 // We intentional signal *after* dropping the lock 6112 // to avoid a common class of futile wakeups. 6113 status = os::Solaris::cond_signal(_cond); 6114 assert_status(status == 0, status, "cond_signal"); 6115 } 6116} 6117 6118// JSR166 6119// ------------------------------------------------------- 6120 6121/* 6122 * The solaris and linux implementations of park/unpark are fairly 6123 * conservative for now, but can be improved. They currently use a 6124 * mutex/condvar pair, plus _counter. 6125 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6126 * sets count to 1 and signals condvar. Only one thread ever waits 6127 * on the condvar. Contention seen when trying to park implies that someone 6128 * is unparking you, so don't wait. And spurious returns are fine, so there 6129 * is no need to track notifications. 6130 */ 6131 6132#define MAX_SECS 100000000 6133/* 6134 * This code is common to linux and solaris and will be moved to a 6135 * common place in dolphin. 6136 * 6137 * The passed in time value is either a relative time in nanoseconds 6138 * or an absolute time in milliseconds. Either way it has to be unpacked 6139 * into suitable seconds and nanoseconds components and stored in the 6140 * given timespec structure. 6141 * Given time is a 64-bit value and the time_t used in the timespec is only 6142 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6143 * overflow if times way in the future are given. Further on Solaris versions 6144 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6145 * number of seconds, in abstime, is less than current_time + 100,000,000. 6146 * As it will be 28 years before "now + 100000000" will overflow we can 6147 * ignore overflow and just impose a hard-limit on seconds using the value 6148 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6149 * years from "now". 6150 */ 6151static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6152 assert (time > 0, "convertTime"); 6153 6154 struct timeval now; 6155 int status = gettimeofday(&now, NULL); 6156 assert(status == 0, "gettimeofday"); 6157 6158 time_t max_secs = now.tv_sec + MAX_SECS; 6159 6160 if (isAbsolute) { 6161 jlong secs = time / 1000; 6162 if (secs > max_secs) { 6163 absTime->tv_sec = max_secs; 6164 } 6165 else { 6166 absTime->tv_sec = secs; 6167 } 6168 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6169 } 6170 else { 6171 jlong secs = time / NANOSECS_PER_SEC; 6172 if (secs >= MAX_SECS) { 6173 absTime->tv_sec = max_secs; 6174 absTime->tv_nsec = 0; 6175 } 6176 else { 6177 absTime->tv_sec = now.tv_sec + secs; 6178 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6179 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6180 absTime->tv_nsec -= NANOSECS_PER_SEC; 6181 ++absTime->tv_sec; // note: this must be <= max_secs 6182 } 6183 } 6184 } 6185 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6186 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6187 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6188 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6189} 6190 6191void Parker::park(bool isAbsolute, jlong time) { 6192 // Ideally we'd do something useful while spinning, such 6193 // as calling unpackTime(). 6194 6195 // Optional fast-path check: 6196 // Return immediately if a permit is available. 6197 // We depend on Atomic::xchg() having full barrier semantics 6198 // since we are doing a lock-free update to _counter. 6199 if (Atomic::xchg(0, &_counter) > 0) return; 6200 6201 // Optional fast-exit: Check interrupt before trying to wait 6202 Thread* thread = Thread::current(); 6203 assert(thread->is_Java_thread(), "Must be JavaThread"); 6204 JavaThread *jt = (JavaThread *)thread; 6205 if (Thread::is_interrupted(thread, false)) { 6206 return; 6207 } 6208 6209 // First, demultiplex/decode time arguments 6210 timespec absTime; 6211 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6212 return; 6213 } 6214 if (time > 0) { 6215 // Warning: this code might be exposed to the old Solaris time 6216 // round-down bugs. Grep "roundingFix" for details. 6217 unpackTime(&absTime, isAbsolute, time); 6218 } 6219 6220 // Enter safepoint region 6221 // Beware of deadlocks such as 6317397. 6222 // The per-thread Parker:: _mutex is a classic leaf-lock. 6223 // In particular a thread must never block on the Threads_lock while 6224 // holding the Parker:: mutex. If safepoints are pending both the 6225 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6226 ThreadBlockInVM tbivm(jt); 6227 6228 // Don't wait if cannot get lock since interference arises from 6229 // unblocking. Also. check interrupt before trying wait 6230 if (Thread::is_interrupted(thread, false) || 6231 os::Solaris::mutex_trylock(_mutex) != 0) { 6232 return; 6233 } 6234 6235 int status ; 6236 6237 if (_counter > 0) { // no wait needed 6238 _counter = 0; 6239 status = os::Solaris::mutex_unlock(_mutex); 6240 assert (status == 0, "invariant") ; 6241 // Paranoia to ensure our locked and lock-free paths interact 6242 // correctly with each other and Java-level accesses. 6243 OrderAccess::fence(); 6244 return; 6245 } 6246 6247#ifdef ASSERT 6248 // Don't catch signals while blocked; let the running threads have the signals. 6249 // (This allows a debugger to break into the running thread.) 6250 sigset_t oldsigs; 6251 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6252 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6253#endif 6254 6255 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6256 jt->set_suspend_equivalent(); 6257 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6258 6259 // Do this the hard way by blocking ... 6260 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6261 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6262 // Only for SPARC >= V8PlusA 6263#if defined(__sparc) && defined(COMPILER2) 6264 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6265#endif 6266 6267 if (time == 0) { 6268 status = os::Solaris::cond_wait (_cond, _mutex) ; 6269 } else { 6270 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6271 } 6272 // Note that an untimed cond_wait() can sometimes return ETIME on older 6273 // versions of the Solaris. 6274 assert_status(status == 0 || status == EINTR || 6275 status == ETIME || status == ETIMEDOUT, 6276 status, "cond_timedwait"); 6277 6278#ifdef ASSERT 6279 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6280#endif 6281 _counter = 0 ; 6282 status = os::Solaris::mutex_unlock(_mutex); 6283 assert_status(status == 0, status, "mutex_unlock") ; 6284 // Paranoia to ensure our locked and lock-free paths interact 6285 // correctly with each other and Java-level accesses. 6286 OrderAccess::fence(); 6287 6288 // If externally suspended while waiting, re-suspend 6289 if (jt->handle_special_suspend_equivalent_condition()) { 6290 jt->java_suspend_self(); 6291 } 6292} 6293 6294void Parker::unpark() { 6295 int s, status ; 6296 status = os::Solaris::mutex_lock (_mutex) ; 6297 assert (status == 0, "invariant") ; 6298 s = _counter; 6299 _counter = 1; 6300 status = os::Solaris::mutex_unlock (_mutex) ; 6301 assert (status == 0, "invariant") ; 6302 6303 if (s < 1) { 6304 status = os::Solaris::cond_signal (_cond) ; 6305 assert (status == 0, "invariant") ; 6306 } 6307} 6308 6309extern char** environ; 6310 6311// Run the specified command in a separate process. Return its exit value, 6312// or -1 on failure (e.g. can't fork a new process). 6313// Unlike system(), this function can be called from signal handler. It 6314// doesn't block SIGINT et al. 6315int os::fork_and_exec(char* cmd) { 6316 char * argv[4]; 6317 argv[0] = (char *)"sh"; 6318 argv[1] = (char *)"-c"; 6319 argv[2] = cmd; 6320 argv[3] = NULL; 6321 6322 // fork is async-safe, fork1 is not so can't use in signal handler 6323 pid_t pid; 6324 Thread* t = ThreadLocalStorage::get_thread_slow(); 6325 if (t != NULL && t->is_inside_signal_handler()) { 6326 pid = fork(); 6327 } else { 6328 pid = fork1(); 6329 } 6330 6331 if (pid < 0) { 6332 // fork failed 6333 warning("fork failed: %s", strerror(errno)); 6334 return -1; 6335 6336 } else if (pid == 0) { 6337 // child process 6338 6339 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6340 execve("/usr/bin/sh", argv, environ); 6341 6342 // execve failed 6343 _exit(-1); 6344 6345 } else { 6346 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6347 // care about the actual exit code, for now. 6348 6349 int status; 6350 6351 // Wait for the child process to exit. This returns immediately if 6352 // the child has already exited. */ 6353 while (waitpid(pid, &status, 0) < 0) { 6354 switch (errno) { 6355 case ECHILD: return 0; 6356 case EINTR: break; 6357 default: return -1; 6358 } 6359 } 6360 6361 if (WIFEXITED(status)) { 6362 // The child exited normally; get its exit code. 6363 return WEXITSTATUS(status); 6364 } else if (WIFSIGNALED(status)) { 6365 // The child exited because of a signal 6366 // The best value to return is 0x80 + signal number, 6367 // because that is what all Unix shells do, and because 6368 // it allows callers to distinguish between process exit and 6369 // process death by signal. 6370 return 0x80 + WTERMSIG(status); 6371 } else { 6372 // Unknown exit code; pass it through 6373 return status; 6374 } 6375 } 6376} 6377 6378// is_headless_jre() 6379// 6380// Test for the existence of xawt/libmawt.so or libawt_xawt.so 6381// in order to report if we are running in a headless jre 6382// 6383// Since JDK8 xawt/libmawt.so was moved into the same directory 6384// as libawt.so, and renamed libawt_xawt.so 6385// 6386bool os::is_headless_jre() { 6387 struct stat statbuf; 6388 char buf[MAXPATHLEN]; 6389 char libmawtpath[MAXPATHLEN]; 6390 const char *xawtstr = "/xawt/libmawt.so"; 6391 const char *new_xawtstr = "/libawt_xawt.so"; 6392 char *p; 6393 6394 // Get path to libjvm.so 6395 os::jvm_path(buf, sizeof(buf)); 6396 6397 // Get rid of libjvm.so 6398 p = strrchr(buf, '/'); 6399 if (p == NULL) return false; 6400 else *p = '\0'; 6401 6402 // Get rid of client or server 6403 p = strrchr(buf, '/'); 6404 if (p == NULL) return false; 6405 else *p = '\0'; 6406 6407 // check xawt/libmawt.so 6408 strcpy(libmawtpath, buf); 6409 strcat(libmawtpath, xawtstr); 6410 if (::stat(libmawtpath, &statbuf) == 0) return false; 6411 6412 // check libawt_xawt.so 6413 strcpy(libmawtpath, buf); 6414 strcat(libmawtpath, new_xawtstr); 6415 if (::stat(libmawtpath, &statbuf) == 0) return false; 6416 6417 return true; 6418} 6419 6420size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6421 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6422} 6423 6424int os::close(int fd) { 6425 RESTARTABLE_RETURN_INT(::close(fd)); 6426} 6427 6428int os::socket_close(int fd) { 6429 RESTARTABLE_RETURN_INT(::close(fd)); 6430} 6431 6432int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 6433 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6434} 6435 6436int os::send(int fd, char* buf, size_t nBytes, uint flags) { 6437 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6438} 6439 6440int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 6441 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 6442} 6443 6444// As both poll and select can be interrupted by signals, we have to be 6445// prepared to restart the system call after updating the timeout, unless 6446// a poll() is done with timeout == -1, in which case we repeat with this 6447// "wait forever" value. 6448 6449int os::timeout(int fd, long timeout) { 6450 int res; 6451 struct timeval t; 6452 julong prevtime, newtime; 6453 static const char* aNull = 0; 6454 struct pollfd pfd; 6455 pfd.fd = fd; 6456 pfd.events = POLLIN; 6457 6458 gettimeofday(&t, &aNull); 6459 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6460 6461 for(;;) { 6462 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6463 if(res == OS_ERR && errno == EINTR) { 6464 if(timeout != -1) { 6465 gettimeofday(&t, &aNull); 6466 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6467 timeout -= newtime - prevtime; 6468 if(timeout <= 0) 6469 return OS_OK; 6470 prevtime = newtime; 6471 } 6472 } else return res; 6473 } 6474} 6475 6476int os::connect(int fd, struct sockaddr *him, socklen_t len) { 6477 int _result; 6478 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\ 6479 os::Solaris::clear_interrupted); 6480 6481 // Depending on when thread interruption is reset, _result could be 6482 // one of two values when errno == EINTR 6483 6484 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6485 && (errno == EINTR)) { 6486 /* restarting a connect() changes its errno semantics */ 6487 INTERRUPTIBLE(::connect(fd, him, len), _result,\ 6488 os::Solaris::clear_interrupted); 6489 /* undo these changes */ 6490 if (_result == OS_ERR) { 6491 if (errno == EALREADY) { 6492 errno = EINPROGRESS; /* fall through */ 6493 } else if (errno == EISCONN) { 6494 errno = 0; 6495 return OS_OK; 6496 } 6497 } 6498 } 6499 return _result; 6500 } 6501 6502int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 6503 if (fd < 0) { 6504 return OS_ERR; 6505 } 6506 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\ 6507 os::Solaris::clear_interrupted); 6508} 6509 6510int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 6511 sockaddr* from, socklen_t* fromlen) { 6512 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\ 6513 os::Solaris::clear_interrupted); 6514} 6515 6516int os::sendto(int fd, char* buf, size_t len, uint flags, 6517 struct sockaddr* to, socklen_t tolen) { 6518 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\ 6519 os::Solaris::clear_interrupted); 6520} 6521 6522int os::socket_available(int fd, jint *pbytes) { 6523 if (fd < 0) { 6524 return OS_OK; 6525 } 6526 int ret; 6527 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6528 // note: ioctl can return 0 when successful, JVM_SocketAvailable 6529 // is expected to return 0 on failure and 1 on success to the jdk. 6530 return (ret == OS_ERR) ? 0 : 1; 6531} 6532 6533int os::bind(int fd, struct sockaddr* him, socklen_t len) { 6534 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6535 os::Solaris::clear_interrupted); 6536} 6537 6538// Get the default path to the core file 6539// Returns the length of the string 6540int os::get_core_path(char* buffer, size_t bufferSize) { 6541 const char* p = get_current_directory(buffer, bufferSize); 6542 6543 if (p == NULL) { 6544 assert(p != NULL, "failed to get current directory"); 6545 return 0; 6546 } 6547 6548 return strlen(buffer); 6549} 6550