os_solaris.cpp revision 1985:039eb4201e06
1/* 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// no precompiled headers 26#include "classfile/classLoader.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "code/icBuffer.hpp" 30#include "code/vtableStubs.hpp" 31#include "compiler/compileBroker.hpp" 32#include "interpreter/interpreter.hpp" 33#include "jvm_solaris.h" 34#include "memory/allocation.inline.hpp" 35#include "memory/filemap.hpp" 36#include "mutex_solaris.inline.hpp" 37#include "oops/oop.inline.hpp" 38#include "os_share_solaris.hpp" 39#include "prims/jniFastGetField.hpp" 40#include "prims/jvm.h" 41#include "prims/jvm_misc.hpp" 42#include "runtime/arguments.hpp" 43#include "runtime/extendedPC.hpp" 44#include "runtime/globals.hpp" 45#include "runtime/interfaceSupport.hpp" 46#include "runtime/java.hpp" 47#include "runtime/javaCalls.hpp" 48#include "runtime/mutexLocker.hpp" 49#include "runtime/objectMonitor.hpp" 50#include "runtime/osThread.hpp" 51#include "runtime/perfMemory.hpp" 52#include "runtime/sharedRuntime.hpp" 53#include "runtime/statSampler.hpp" 54#include "runtime/stubRoutines.hpp" 55#include "runtime/threadCritical.hpp" 56#include "runtime/timer.hpp" 57#include "services/attachListener.hpp" 58#include "services/runtimeService.hpp" 59#include "thread_solaris.inline.hpp" 60#include "utilities/decoder.hpp" 61#include "utilities/defaultStream.hpp" 62#include "utilities/events.hpp" 63#include "utilities/growableArray.hpp" 64#include "utilities/vmError.hpp" 65#ifdef TARGET_ARCH_x86 66# include "assembler_x86.inline.hpp" 67# include "nativeInst_x86.hpp" 68#endif 69#ifdef TARGET_ARCH_sparc 70# include "assembler_sparc.inline.hpp" 71# include "nativeInst_sparc.hpp" 72#endif 73#ifdef COMPILER1 74#include "c1/c1_Runtime1.hpp" 75#endif 76#ifdef COMPILER2 77#include "opto/runtime.hpp" 78#endif 79 80// put OS-includes here 81# include <dlfcn.h> 82# include <errno.h> 83# include <exception> 84# include <link.h> 85# include <poll.h> 86# include <pthread.h> 87# include <pwd.h> 88# include <schedctl.h> 89# include <setjmp.h> 90# include <signal.h> 91# include <stdio.h> 92# include <alloca.h> 93# include <sys/filio.h> 94# include <sys/ipc.h> 95# include <sys/lwp.h> 96# include <sys/machelf.h> // for elf Sym structure used by dladdr1 97# include <sys/mman.h> 98# include <sys/processor.h> 99# include <sys/procset.h> 100# include <sys/pset.h> 101# include <sys/resource.h> 102# include <sys/shm.h> 103# include <sys/socket.h> 104# include <sys/stat.h> 105# include <sys/systeminfo.h> 106# include <sys/time.h> 107# include <sys/times.h> 108# include <sys/types.h> 109# include <sys/wait.h> 110# include <sys/utsname.h> 111# include <thread.h> 112# include <unistd.h> 113# include <sys/priocntl.h> 114# include <sys/rtpriocntl.h> 115# include <sys/tspriocntl.h> 116# include <sys/iapriocntl.h> 117# include <sys/loadavg.h> 118# include <string.h> 119# include <stdio.h> 120 121# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 122# include <sys/procfs.h> // see comment in <sys/procfs.h> 123 124#define MAX_PATH (2 * K) 125 126// for timer info max values which include all bits 127#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 128 129#ifdef _GNU_SOURCE 130// See bug #6514594 131extern "C" int madvise(caddr_t, size_t, int); 132extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 133 int attr, int mask); 134#endif //_GNU_SOURCE 135 136/* 137 MPSS Changes Start. 138 The JVM binary needs to be built and run on pre-Solaris 9 139 systems, but the constants needed by MPSS are only in Solaris 9 140 header files. They are textually replicated here to allow 141 building on earlier systems. Once building on Solaris 8 is 142 no longer a requirement, these #defines can be replaced by ordinary 143 system .h inclusion. 144 145 In earlier versions of the JDK and Solaris, we used ISM for large pages. 146 But ISM requires shared memory to achieve this and thus has many caveats. 147 MPSS is a fully transparent and is a cleaner way to get large pages. 148 Although we still require keeping ISM for backward compatiblitiy as well as 149 giving the opportunity to use large pages on older systems it is 150 recommended that MPSS be used for Solaris 9 and above. 151 152*/ 153 154#ifndef MC_HAT_ADVISE 155 156struct memcntl_mha { 157 uint_t mha_cmd; /* command(s) */ 158 uint_t mha_flags; 159 size_t mha_pagesize; 160}; 161#define MC_HAT_ADVISE 7 /* advise hat map size */ 162#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 163#define MAP_ALIGN 0x200 /* addr specifies alignment */ 164 165#endif 166// MPSS Changes End. 167 168 169// Here are some liblgrp types from sys/lgrp_user.h to be able to 170// compile on older systems without this header file. 171 172#ifndef MADV_ACCESS_LWP 173# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 174#endif 175#ifndef MADV_ACCESS_MANY 176# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 177#endif 178 179#ifndef LGRP_RSRC_CPU 180# define LGRP_RSRC_CPU 0 /* CPU resources */ 181#endif 182#ifndef LGRP_RSRC_MEM 183# define LGRP_RSRC_MEM 1 /* memory resources */ 184#endif 185 186// Some more macros from sys/mman.h that are not present in Solaris 8. 187 188#ifndef MAX_MEMINFO_CNT 189/* 190 * info_req request type definitions for meminfo 191 * request types starting with MEMINFO_V are used for Virtual addresses 192 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 193 * addresses 194 */ 195# define MEMINFO_SHIFT 16 196# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 197# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 198# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 199# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 200# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 201# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 202# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 203# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 204 205/* maximum number of addresses meminfo() can process at a time */ 206# define MAX_MEMINFO_CNT 256 207 208/* maximum number of request types */ 209# define MAX_MEMINFO_REQ 31 210#endif 211 212// see thr_setprio(3T) for the basis of these numbers 213#define MinimumPriority 0 214#define NormalPriority 64 215#define MaximumPriority 127 216 217// Values for ThreadPriorityPolicy == 1 218int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 219 80, 96, 112, 124, 127 }; 220 221// System parameters used internally 222static clock_t clock_tics_per_sec = 100; 223 224// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 225static bool enabled_extended_FILE_stdio = false; 226 227// For diagnostics to print a message once. see run_periodic_checks 228static bool check_addr0_done = false; 229static sigset_t check_signal_done; 230static bool check_signals = true; 231 232address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 233address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 234 235address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 236 237 238// "default" initializers for missing libc APIs 239extern "C" { 240 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 241 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 242 243 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 244 static int lwp_cond_destroy(cond_t *cv) { return 0; } 245} 246 247// "default" initializers for pthread-based synchronization 248extern "C" { 249 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 250 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 251} 252 253// Thread Local Storage 254// This is common to all Solaris platforms so it is defined here, 255// in this common file. 256// The declarations are in the os_cpu threadLS*.hpp files. 257// 258// Static member initialization for TLS 259Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 260 261#ifndef PRODUCT 262#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 263 264int ThreadLocalStorage::_tcacheHit = 0; 265int ThreadLocalStorage::_tcacheMiss = 0; 266 267void ThreadLocalStorage::print_statistics() { 268 int total = _tcacheMiss+_tcacheHit; 269 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 270 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 271} 272#undef _PCT 273#endif // PRODUCT 274 275Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 276 int index) { 277 Thread *thread = get_thread_slow(); 278 if (thread != NULL) { 279 address sp = os::current_stack_pointer(); 280 guarantee(thread->_stack_base == NULL || 281 (sp <= thread->_stack_base && 282 sp >= thread->_stack_base - thread->_stack_size) || 283 is_error_reported(), 284 "sp must be inside of selected thread stack"); 285 286 thread->_self_raw_id = raw_id; // mark for quick retrieval 287 _get_thread_cache[ index ] = thread; 288 } 289 return thread; 290} 291 292 293static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 294#define NO_CACHED_THREAD ((Thread*)all_zero) 295 296void ThreadLocalStorage::pd_set_thread(Thread* thread) { 297 298 // Store the new value before updating the cache to prevent a race 299 // between get_thread_via_cache_slowly() and this store operation. 300 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 301 302 // Update thread cache with new thread if setting on thread create, 303 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 304 uintptr_t raw = pd_raw_thread_id(); 305 int ix = pd_cache_index(raw); 306 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 307} 308 309void ThreadLocalStorage::pd_init() { 310 for (int i = 0; i < _pd_cache_size; i++) { 311 _get_thread_cache[i] = NO_CACHED_THREAD; 312 } 313} 314 315// Invalidate all the caches (happens to be the same as pd_init). 316void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 317 318#undef NO_CACHED_THREAD 319 320// END Thread Local Storage 321 322static inline size_t adjust_stack_size(address base, size_t size) { 323 if ((ssize_t)size < 0) { 324 // 4759953: Compensate for ridiculous stack size. 325 size = max_intx; 326 } 327 if (size > (size_t)base) { 328 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 329 size = (size_t)base; 330 } 331 return size; 332} 333 334static inline stack_t get_stack_info() { 335 stack_t st; 336 int retval = thr_stksegment(&st); 337 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 338 assert(retval == 0, "incorrect return value from thr_stksegment"); 339 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 340 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 341 return st; 342} 343 344address os::current_stack_base() { 345 int r = thr_main() ; 346 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 347 bool is_primordial_thread = r; 348 349 // Workaround 4352906, avoid calls to thr_stksegment by 350 // thr_main after the first one (it looks like we trash 351 // some data, causing the value for ss_sp to be incorrect). 352 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 353 stack_t st = get_stack_info(); 354 if (is_primordial_thread) { 355 // cache initial value of stack base 356 os::Solaris::_main_stack_base = (address)st.ss_sp; 357 } 358 return (address)st.ss_sp; 359 } else { 360 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 361 return os::Solaris::_main_stack_base; 362 } 363} 364 365size_t os::current_stack_size() { 366 size_t size; 367 368 int r = thr_main() ; 369 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 370 if(!r) { 371 size = get_stack_info().ss_size; 372 } else { 373 struct rlimit limits; 374 getrlimit(RLIMIT_STACK, &limits); 375 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 376 } 377 // base may not be page aligned 378 address base = current_stack_base(); 379 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 380 return (size_t)(base - bottom); 381} 382 383struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 384 return localtime_r(clock, res); 385} 386 387// interruptible infrastructure 388 389// setup_interruptible saves the thread state before going into an 390// interruptible system call. 391// The saved state is used to restore the thread to 392// its former state whether or not an interrupt is received. 393// Used by classloader os::read 394// os::restartable_read calls skip this layer and stay in _thread_in_native 395 396void os::Solaris::setup_interruptible(JavaThread* thread) { 397 398 JavaThreadState thread_state = thread->thread_state(); 399 400 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 401 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 402 OSThread* osthread = thread->osthread(); 403 osthread->set_saved_interrupt_thread_state(thread_state); 404 thread->frame_anchor()->make_walkable(thread); 405 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 406} 407 408// Version of setup_interruptible() for threads that are already in 409// _thread_blocked. Used by os_sleep(). 410void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 411 thread->frame_anchor()->make_walkable(thread); 412} 413 414JavaThread* os::Solaris::setup_interruptible() { 415 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 416 setup_interruptible(thread); 417 return thread; 418} 419 420void os::Solaris::try_enable_extended_io() { 421 typedef int (*enable_extended_FILE_stdio_t)(int, int); 422 423 if (!UseExtendedFileIO) { 424 return; 425 } 426 427 enable_extended_FILE_stdio_t enabler = 428 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 429 "enable_extended_FILE_stdio"); 430 if (enabler) { 431 enabler(-1, -1); 432 } 433} 434 435 436#ifdef ASSERT 437 438JavaThread* os::Solaris::setup_interruptible_native() { 439 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 440 JavaThreadState thread_state = thread->thread_state(); 441 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 442 return thread; 443} 444 445void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 446 JavaThreadState thread_state = thread->thread_state(); 447 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 448} 449#endif 450 451// cleanup_interruptible reverses the effects of setup_interruptible 452// setup_interruptible_already_blocked() does not need any cleanup. 453 454void os::Solaris::cleanup_interruptible(JavaThread* thread) { 455 OSThread* osthread = thread->osthread(); 456 457 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 458} 459 460// I/O interruption related counters called in _INTERRUPTIBLE 461 462void os::Solaris::bump_interrupted_before_count() { 463 RuntimeService::record_interrupted_before_count(); 464} 465 466void os::Solaris::bump_interrupted_during_count() { 467 RuntimeService::record_interrupted_during_count(); 468} 469 470static int _processors_online = 0; 471 472 jint os::Solaris::_os_thread_limit = 0; 473volatile jint os::Solaris::_os_thread_count = 0; 474 475julong os::available_memory() { 476 return Solaris::available_memory(); 477} 478 479julong os::Solaris::available_memory() { 480 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 481} 482 483julong os::Solaris::_physical_memory = 0; 484 485julong os::physical_memory() { 486 return Solaris::physical_memory(); 487} 488 489julong os::allocatable_physical_memory(julong size) { 490#ifdef _LP64 491 return size; 492#else 493 julong result = MIN2(size, (julong)3835*M); 494 if (!is_allocatable(result)) { 495 // Memory allocations will be aligned but the alignment 496 // is not known at this point. Alignments will 497 // be at most to LargePageSizeInBytes. Protect 498 // allocations from alignments up to illegal 499 // values. If at this point 2G is illegal. 500 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 501 result = MIN2(size, reasonable_size); 502 } 503 return result; 504#endif 505} 506 507static hrtime_t first_hrtime = 0; 508static const hrtime_t hrtime_hz = 1000*1000*1000; 509const int LOCK_BUSY = 1; 510const int LOCK_FREE = 0; 511const int LOCK_INVALID = -1; 512static volatile hrtime_t max_hrtime = 0; 513static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 514 515 516void os::Solaris::initialize_system_info() { 517 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 518 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 519 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 520} 521 522int os::active_processor_count() { 523 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 524 pid_t pid = getpid(); 525 psetid_t pset = PS_NONE; 526 // Are we running in a processor set or is there any processor set around? 527 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 528 uint_t pset_cpus; 529 // Query the number of cpus available to us. 530 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 531 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 532 _processors_online = pset_cpus; 533 return pset_cpus; 534 } 535 } 536 // Otherwise return number of online cpus 537 return online_cpus; 538} 539 540static bool find_processors_in_pset(psetid_t pset, 541 processorid_t** id_array, 542 uint_t* id_length) { 543 bool result = false; 544 // Find the number of processors in the processor set. 545 if (pset_info(pset, NULL, id_length, NULL) == 0) { 546 // Make up an array to hold their ids. 547 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 548 // Fill in the array with their processor ids. 549 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 550 result = true; 551 } 552 } 553 return result; 554} 555 556// Callers of find_processors_online() must tolerate imprecise results -- 557// the system configuration can change asynchronously because of DR 558// or explicit psradm operations. 559// 560// We also need to take care that the loop (below) terminates as the 561// number of processors online can change between the _SC_NPROCESSORS_ONLN 562// request and the loop that builds the list of processor ids. Unfortunately 563// there's no reliable way to determine the maximum valid processor id, 564// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 565// man pages, which claim the processor id set is "sparse, but 566// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 567// exit the loop. 568// 569// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 570// not available on S8.0. 571 572static bool find_processors_online(processorid_t** id_array, 573 uint* id_length) { 574 const processorid_t MAX_PROCESSOR_ID = 100000 ; 575 // Find the number of processors online. 576 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 577 // Make up an array to hold their ids. 578 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 579 // Processors need not be numbered consecutively. 580 long found = 0; 581 processorid_t next = 0; 582 while (found < *id_length && next < MAX_PROCESSOR_ID) { 583 processor_info_t info; 584 if (processor_info(next, &info) == 0) { 585 // NB, PI_NOINTR processors are effectively online ... 586 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 587 (*id_array)[found] = next; 588 found += 1; 589 } 590 } 591 next += 1; 592 } 593 if (found < *id_length) { 594 // The loop above didn't identify the expected number of processors. 595 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 596 // and re-running the loop, above, but there's no guarantee of progress 597 // if the system configuration is in flux. Instead, we just return what 598 // we've got. Note that in the worst case find_processors_online() could 599 // return an empty set. (As a fall-back in the case of the empty set we 600 // could just return the ID of the current processor). 601 *id_length = found ; 602 } 603 604 return true; 605} 606 607static bool assign_distribution(processorid_t* id_array, 608 uint id_length, 609 uint* distribution, 610 uint distribution_length) { 611 // We assume we can assign processorid_t's to uint's. 612 assert(sizeof(processorid_t) == sizeof(uint), 613 "can't convert processorid_t to uint"); 614 // Quick check to see if we won't succeed. 615 if (id_length < distribution_length) { 616 return false; 617 } 618 // Assign processor ids to the distribution. 619 // Try to shuffle processors to distribute work across boards, 620 // assuming 4 processors per board. 621 const uint processors_per_board = ProcessDistributionStride; 622 // Find the maximum processor id. 623 processorid_t max_id = 0; 624 for (uint m = 0; m < id_length; m += 1) { 625 max_id = MAX2(max_id, id_array[m]); 626 } 627 // The next id, to limit loops. 628 const processorid_t limit_id = max_id + 1; 629 // Make up markers for available processors. 630 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 631 for (uint c = 0; c < limit_id; c += 1) { 632 available_id[c] = false; 633 } 634 for (uint a = 0; a < id_length; a += 1) { 635 available_id[id_array[a]] = true; 636 } 637 // Step by "boards", then by "slot", copying to "assigned". 638 // NEEDS_CLEANUP: The assignment of processors should be stateful, 639 // remembering which processors have been assigned by 640 // previous calls, etc., so as to distribute several 641 // independent calls of this method. What we'd like is 642 // It would be nice to have an API that let us ask 643 // how many processes are bound to a processor, 644 // but we don't have that, either. 645 // In the short term, "board" is static so that 646 // subsequent distributions don't all start at board 0. 647 static uint board = 0; 648 uint assigned = 0; 649 // Until we've found enough processors .... 650 while (assigned < distribution_length) { 651 // ... find the next available processor in the board. 652 for (uint slot = 0; slot < processors_per_board; slot += 1) { 653 uint try_id = board * processors_per_board + slot; 654 if ((try_id < limit_id) && (available_id[try_id] == true)) { 655 distribution[assigned] = try_id; 656 available_id[try_id] = false; 657 assigned += 1; 658 break; 659 } 660 } 661 board += 1; 662 if (board * processors_per_board + 0 >= limit_id) { 663 board = 0; 664 } 665 } 666 if (available_id != NULL) { 667 FREE_C_HEAP_ARRAY(bool, available_id); 668 } 669 return true; 670} 671 672bool os::distribute_processes(uint length, uint* distribution) { 673 bool result = false; 674 // Find the processor id's of all the available CPUs. 675 processorid_t* id_array = NULL; 676 uint id_length = 0; 677 // There are some races between querying information and using it, 678 // since processor sets can change dynamically. 679 psetid_t pset = PS_NONE; 680 // Are we running in a processor set? 681 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 682 result = find_processors_in_pset(pset, &id_array, &id_length); 683 } else { 684 result = find_processors_online(&id_array, &id_length); 685 } 686 if (result == true) { 687 if (id_length >= length) { 688 result = assign_distribution(id_array, id_length, distribution, length); 689 } else { 690 result = false; 691 } 692 } 693 if (id_array != NULL) { 694 FREE_C_HEAP_ARRAY(processorid_t, id_array); 695 } 696 return result; 697} 698 699bool os::bind_to_processor(uint processor_id) { 700 // We assume that a processorid_t can be stored in a uint. 701 assert(sizeof(uint) == sizeof(processorid_t), 702 "can't convert uint to processorid_t"); 703 int bind_result = 704 processor_bind(P_LWPID, // bind LWP. 705 P_MYID, // bind current LWP. 706 (processorid_t) processor_id, // id. 707 NULL); // don't return old binding. 708 return (bind_result == 0); 709} 710 711bool os::getenv(const char* name, char* buffer, int len) { 712 char* val = ::getenv( name ); 713 if ( val == NULL 714 || strlen(val) + 1 > len ) { 715 if (len > 0) buffer[0] = 0; // return a null string 716 return false; 717 } 718 strcpy( buffer, val ); 719 return true; 720} 721 722 723// Return true if user is running as root. 724 725bool os::have_special_privileges() { 726 static bool init = false; 727 static bool privileges = false; 728 if (!init) { 729 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 730 init = true; 731 } 732 return privileges; 733} 734 735 736void os::init_system_properties_values() { 737 char arch[12]; 738 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 739 740 // The next steps are taken in the product version: 741 // 742 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 743 // This library should be located at: 744 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 745 // 746 // If "/jre/lib/" appears at the right place in the path, then we 747 // assume libjvm[_g].so is installed in a JDK and we use this path. 748 // 749 // Otherwise exit with message: "Could not create the Java virtual machine." 750 // 751 // The following extra steps are taken in the debugging version: 752 // 753 // If "/jre/lib/" does NOT appear at the right place in the path 754 // instead of exit check for $JAVA_HOME environment variable. 755 // 756 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 757 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 758 // it looks like libjvm[_g].so is installed there 759 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 760 // 761 // Otherwise exit. 762 // 763 // Important note: if the location of libjvm.so changes this 764 // code needs to be changed accordingly. 765 766 // The next few definitions allow the code to be verbatim: 767#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 768#define free(p) FREE_C_HEAP_ARRAY(char, p) 769#define getenv(n) ::getenv(n) 770 771#define EXTENSIONS_DIR "/lib/ext" 772#define ENDORSED_DIR "/lib/endorsed" 773#define COMMON_DIR "/usr/jdk/packages" 774 775 { 776 /* sysclasspath, java_home, dll_dir */ 777 { 778 char *home_path; 779 char *dll_path; 780 char *pslash; 781 char buf[MAXPATHLEN]; 782 os::jvm_path(buf, sizeof(buf)); 783 784 // Found the full path to libjvm.so. 785 // Now cut the path to <java_home>/jre if we can. 786 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 787 pslash = strrchr(buf, '/'); 788 if (pslash != NULL) 789 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 790 dll_path = malloc(strlen(buf) + 1); 791 if (dll_path == NULL) 792 return; 793 strcpy(dll_path, buf); 794 Arguments::set_dll_dir(dll_path); 795 796 if (pslash != NULL) { 797 pslash = strrchr(buf, '/'); 798 if (pslash != NULL) { 799 *pslash = '\0'; /* get rid of /<arch> */ 800 pslash = strrchr(buf, '/'); 801 if (pslash != NULL) 802 *pslash = '\0'; /* get rid of /lib */ 803 } 804 } 805 806 home_path = malloc(strlen(buf) + 1); 807 if (home_path == NULL) 808 return; 809 strcpy(home_path, buf); 810 Arguments::set_java_home(home_path); 811 812 if (!set_boot_path('/', ':')) 813 return; 814 } 815 816 /* 817 * Where to look for native libraries 818 */ 819 { 820 // Use dlinfo() to determine the correct java.library.path. 821 // 822 // If we're launched by the Java launcher, and the user 823 // does not set java.library.path explicitly on the commandline, 824 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 825 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 826 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 827 // /usr/lib), which is exactly what we want. 828 // 829 // If the user does set java.library.path, it completely 830 // overwrites this setting, and always has. 831 // 832 // If we're not launched by the Java launcher, we may 833 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 834 // settings. Again, dlinfo does exactly what we want. 835 836 Dl_serinfo _info, *info = &_info; 837 Dl_serpath *path; 838 char* library_path; 839 char *common_path; 840 int i; 841 842 // determine search path count and required buffer size 843 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 844 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 845 } 846 847 // allocate new buffer and initialize 848 info = (Dl_serinfo*)malloc(_info.dls_size); 849 if (info == NULL) { 850 vm_exit_out_of_memory(_info.dls_size, 851 "init_system_properties_values info"); 852 } 853 info->dls_size = _info.dls_size; 854 info->dls_cnt = _info.dls_cnt; 855 856 // obtain search path information 857 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 858 free(info); 859 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 860 } 861 862 path = &info->dls_serpath[0]; 863 864 // Note: Due to a legacy implementation, most of the library path 865 // is set in the launcher. This was to accomodate linking restrictions 866 // on legacy Solaris implementations (which are no longer supported). 867 // Eventually, all the library path setting will be done here. 868 // 869 // However, to prevent the proliferation of improperly built native 870 // libraries, the new path component /usr/jdk/packages is added here. 871 872 // Determine the actual CPU architecture. 873 char cpu_arch[12]; 874 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 875#ifdef _LP64 876 // If we are a 64-bit vm, perform the following translations: 877 // sparc -> sparcv9 878 // i386 -> amd64 879 if (strcmp(cpu_arch, "sparc") == 0) 880 strcat(cpu_arch, "v9"); 881 else if (strcmp(cpu_arch, "i386") == 0) 882 strcpy(cpu_arch, "amd64"); 883#endif 884 885 // Construct the invariant part of ld_library_path. Note that the 886 // space for the colon and the trailing null are provided by the 887 // nulls included by the sizeof operator. 888 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 889 common_path = malloc(bufsize); 890 if (common_path == NULL) { 891 free(info); 892 vm_exit_out_of_memory(bufsize, 893 "init_system_properties_values common_path"); 894 } 895 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 896 897 // struct size is more than sufficient for the path components obtained 898 // through the dlinfo() call, so only add additional space for the path 899 // components explicitly added here. 900 bufsize = info->dls_size + strlen(common_path); 901 library_path = malloc(bufsize); 902 if (library_path == NULL) { 903 free(info); 904 free(common_path); 905 vm_exit_out_of_memory(bufsize, 906 "init_system_properties_values library_path"); 907 } 908 library_path[0] = '\0'; 909 910 // Construct the desired Java library path from the linker's library 911 // search path. 912 // 913 // For compatibility, it is optimal that we insert the additional path 914 // components specific to the Java VM after those components specified 915 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 916 // infrastructure. 917 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 918 strcpy(library_path, common_path); 919 } else { 920 int inserted = 0; 921 for (i = 0; i < info->dls_cnt; i++, path++) { 922 uint_t flags = path->dls_flags & LA_SER_MASK; 923 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 924 strcat(library_path, common_path); 925 strcat(library_path, os::path_separator()); 926 inserted = 1; 927 } 928 strcat(library_path, path->dls_name); 929 strcat(library_path, os::path_separator()); 930 } 931 // eliminate trailing path separator 932 library_path[strlen(library_path)-1] = '\0'; 933 } 934 935 // happens before argument parsing - can't use a trace flag 936 // tty->print_raw("init_system_properties_values: native lib path: "); 937 // tty->print_raw_cr(library_path); 938 939 // callee copies into its own buffer 940 Arguments::set_library_path(library_path); 941 942 free(common_path); 943 free(library_path); 944 free(info); 945 } 946 947 /* 948 * Extensions directories. 949 * 950 * Note that the space for the colon and the trailing null are provided 951 * by the nulls included by the sizeof operator (so actually one byte more 952 * than necessary is allocated). 953 */ 954 { 955 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 956 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 957 sizeof(EXTENSIONS_DIR)); 958 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 959 Arguments::get_java_home()); 960 Arguments::set_ext_dirs(buf); 961 } 962 963 /* Endorsed standards default directory. */ 964 { 965 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 966 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 967 Arguments::set_endorsed_dirs(buf); 968 } 969 } 970 971#undef malloc 972#undef free 973#undef getenv 974#undef EXTENSIONS_DIR 975#undef ENDORSED_DIR 976#undef COMMON_DIR 977 978} 979 980void os::breakpoint() { 981 BREAKPOINT; 982} 983 984bool os::obsolete_option(const JavaVMOption *option) 985{ 986 if (!strncmp(option->optionString, "-Xt", 3)) { 987 return true; 988 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 989 return true; 990 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 991 return true; 992 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 993 return true; 994 } 995 return false; 996} 997 998bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 999 address stackStart = (address)thread->stack_base(); 1000 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 1001 if (sp < stackStart && sp >= stackEnd ) return true; 1002 return false; 1003} 1004 1005extern "C" void breakpoint() { 1006 // use debugger to set breakpoint here 1007} 1008 1009// Returns an estimate of the current stack pointer. Result must be guaranteed to 1010// point into the calling threads stack, and be no lower than the current stack 1011// pointer. 1012address os::current_stack_pointer() { 1013 volatile int dummy; 1014 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 1015 return sp; 1016} 1017 1018static thread_t main_thread; 1019 1020// Thread start routine for all new Java threads 1021extern "C" void* java_start(void* thread_addr) { 1022 // Try to randomize the cache line index of hot stack frames. 1023 // This helps when threads of the same stack traces evict each other's 1024 // cache lines. The threads can be either from the same JVM instance, or 1025 // from different JVM instances. The benefit is especially true for 1026 // processors with hyperthreading technology. 1027 static int counter = 0; 1028 int pid = os::current_process_id(); 1029 alloca(((pid ^ counter++) & 7) * 128); 1030 1031 int prio; 1032 Thread* thread = (Thread*)thread_addr; 1033 OSThread* osthr = thread->osthread(); 1034 1035 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 1036 thread->_schedctl = (void *) schedctl_init () ; 1037 1038 if (UseNUMA) { 1039 int lgrp_id = os::numa_get_group_id(); 1040 if (lgrp_id != -1) { 1041 thread->set_lgrp_id(lgrp_id); 1042 } 1043 } 1044 1045 // If the creator called set priority before we started, 1046 // we need to call set priority now that we have an lwp. 1047 // Get the priority from libthread and set the priority 1048 // for the new Solaris lwp. 1049 if ( osthr->thread_id() != -1 ) { 1050 if ( UseThreadPriorities ) { 1051 thr_getprio(osthr->thread_id(), &prio); 1052 if (ThreadPriorityVerbose) { 1053 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1054 osthr->thread_id(), osthr->lwp_id(), prio ); 1055 } 1056 os::set_native_priority(thread, prio); 1057 } 1058 } else if (ThreadPriorityVerbose) { 1059 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1060 } 1061 1062 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1063 1064 // initialize signal mask for this thread 1065 os::Solaris::hotspot_sigmask(thread); 1066 1067 thread->run(); 1068 1069 // One less thread is executing 1070 // When the VMThread gets here, the main thread may have already exited 1071 // which frees the CodeHeap containing the Atomic::dec code 1072 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1073 Atomic::dec(&os::Solaris::_os_thread_count); 1074 } 1075 1076 if (UseDetachedThreads) { 1077 thr_exit(NULL); 1078 ShouldNotReachHere(); 1079 } 1080 return NULL; 1081} 1082 1083static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1084 // Allocate the OSThread object 1085 OSThread* osthread = new OSThread(NULL, NULL); 1086 if (osthread == NULL) return NULL; 1087 1088 // Store info on the Solaris thread into the OSThread 1089 osthread->set_thread_id(thread_id); 1090 osthread->set_lwp_id(_lwp_self()); 1091 thread->_schedctl = (void *) schedctl_init () ; 1092 1093 if (UseNUMA) { 1094 int lgrp_id = os::numa_get_group_id(); 1095 if (lgrp_id != -1) { 1096 thread->set_lgrp_id(lgrp_id); 1097 } 1098 } 1099 1100 if ( ThreadPriorityVerbose ) { 1101 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1102 osthread->thread_id(), osthread->lwp_id() ); 1103 } 1104 1105 // Initial thread state is INITIALIZED, not SUSPENDED 1106 osthread->set_state(INITIALIZED); 1107 1108 return osthread; 1109} 1110 1111void os::Solaris::hotspot_sigmask(Thread* thread) { 1112 1113 //Save caller's signal mask 1114 sigset_t sigmask; 1115 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1116 OSThread *osthread = thread->osthread(); 1117 osthread->set_caller_sigmask(sigmask); 1118 1119 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1120 if (!ReduceSignalUsage) { 1121 if (thread->is_VM_thread()) { 1122 // Only the VM thread handles BREAK_SIGNAL ... 1123 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1124 } else { 1125 // ... all other threads block BREAK_SIGNAL 1126 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1127 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1128 } 1129 } 1130} 1131 1132bool os::create_attached_thread(JavaThread* thread) { 1133#ifdef ASSERT 1134 thread->verify_not_published(); 1135#endif 1136 OSThread* osthread = create_os_thread(thread, thr_self()); 1137 if (osthread == NULL) { 1138 return false; 1139 } 1140 1141 // Initial thread state is RUNNABLE 1142 osthread->set_state(RUNNABLE); 1143 thread->set_osthread(osthread); 1144 1145 // initialize signal mask for this thread 1146 // and save the caller's signal mask 1147 os::Solaris::hotspot_sigmask(thread); 1148 1149 return true; 1150} 1151 1152bool os::create_main_thread(JavaThread* thread) { 1153#ifdef ASSERT 1154 thread->verify_not_published(); 1155#endif 1156 if (_starting_thread == NULL) { 1157 _starting_thread = create_os_thread(thread, main_thread); 1158 if (_starting_thread == NULL) { 1159 return false; 1160 } 1161 } 1162 1163 // The primodial thread is runnable from the start 1164 _starting_thread->set_state(RUNNABLE); 1165 1166 thread->set_osthread(_starting_thread); 1167 1168 // initialize signal mask for this thread 1169 // and save the caller's signal mask 1170 os::Solaris::hotspot_sigmask(thread); 1171 1172 return true; 1173} 1174 1175// _T2_libthread is true if we believe we are running with the newer 1176// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1177bool os::Solaris::_T2_libthread = false; 1178 1179bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1180 // Allocate the OSThread object 1181 OSThread* osthread = new OSThread(NULL, NULL); 1182 if (osthread == NULL) { 1183 return false; 1184 } 1185 1186 if ( ThreadPriorityVerbose ) { 1187 char *thrtyp; 1188 switch ( thr_type ) { 1189 case vm_thread: 1190 thrtyp = (char *)"vm"; 1191 break; 1192 case cgc_thread: 1193 thrtyp = (char *)"cgc"; 1194 break; 1195 case pgc_thread: 1196 thrtyp = (char *)"pgc"; 1197 break; 1198 case java_thread: 1199 thrtyp = (char *)"java"; 1200 break; 1201 case compiler_thread: 1202 thrtyp = (char *)"compiler"; 1203 break; 1204 case watcher_thread: 1205 thrtyp = (char *)"watcher"; 1206 break; 1207 default: 1208 thrtyp = (char *)"unknown"; 1209 break; 1210 } 1211 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1212 } 1213 1214 // Calculate stack size if it's not specified by caller. 1215 if (stack_size == 0) { 1216 // The default stack size 1M (2M for LP64). 1217 stack_size = (BytesPerWord >> 2) * K * K; 1218 1219 switch (thr_type) { 1220 case os::java_thread: 1221 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1222 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1223 break; 1224 case os::compiler_thread: 1225 if (CompilerThreadStackSize > 0) { 1226 stack_size = (size_t)(CompilerThreadStackSize * K); 1227 break; 1228 } // else fall through: 1229 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1230 case os::vm_thread: 1231 case os::pgc_thread: 1232 case os::cgc_thread: 1233 case os::watcher_thread: 1234 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1235 break; 1236 } 1237 } 1238 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1239 1240 // Initial state is ALLOCATED but not INITIALIZED 1241 osthread->set_state(ALLOCATED); 1242 1243 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1244 // We got lots of threads. Check if we still have some address space left. 1245 // Need to be at least 5Mb of unreserved address space. We do check by 1246 // trying to reserve some. 1247 const size_t VirtualMemoryBangSize = 20*K*K; 1248 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1249 if (mem == NULL) { 1250 delete osthread; 1251 return false; 1252 } else { 1253 // Release the memory again 1254 os::release_memory(mem, VirtualMemoryBangSize); 1255 } 1256 } 1257 1258 // Setup osthread because the child thread may need it. 1259 thread->set_osthread(osthread); 1260 1261 // Create the Solaris thread 1262 // explicit THR_BOUND for T2_libthread case in case 1263 // that assumption is not accurate, but our alternate signal stack 1264 // handling is based on it which must have bound threads 1265 thread_t tid = 0; 1266 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1267 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1268 (thr_type == vm_thread) || 1269 (thr_type == cgc_thread) || 1270 (thr_type == pgc_thread) || 1271 (thr_type == compiler_thread && BackgroundCompilation)) ? 1272 THR_BOUND : 0); 1273 int status; 1274 1275 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1276 // 1277 // On multiprocessors systems, libthread sometimes under-provisions our 1278 // process with LWPs. On a 30-way systems, for instance, we could have 1279 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1280 // to our process. This can result in under utilization of PEs. 1281 // I suspect the problem is related to libthread's LWP 1282 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1283 // upcall policy. 1284 // 1285 // The following code is palliative -- it attempts to ensure that our 1286 // process has sufficient LWPs to take advantage of multiple PEs. 1287 // Proper long-term cures include using user-level threads bound to LWPs 1288 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1289 // slight timing window with respect to sampling _os_thread_count, but 1290 // the race is benign. Also, we should periodically recompute 1291 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1292 // the number of PEs in our partition. You might be tempted to use 1293 // THR_NEW_LWP here, but I'd recommend against it as that could 1294 // result in undesirable growth of the libthread's LWP pool. 1295 // The fix below isn't sufficient; for instance, it doesn't take into count 1296 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1297 // 1298 // Some pathologies this scheme doesn't handle: 1299 // * Threads can block, releasing the LWPs. The LWPs can age out. 1300 // When a large number of threads become ready again there aren't 1301 // enough LWPs available to service them. This can occur when the 1302 // number of ready threads oscillates. 1303 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1304 // 1305 // Finally, we should call thr_setconcurrency() periodically to refresh 1306 // the LWP pool and thwart the LWP age-out mechanism. 1307 // The "+3" term provides a little slop -- we want to slightly overprovision. 1308 1309 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1310 if (!(flags & THR_BOUND)) { 1311 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1312 } 1313 } 1314 // Although this doesn't hurt, we should warn of undefined behavior 1315 // when using unbound T1 threads with schedctl(). This should never 1316 // happen, as the compiler and VM threads are always created bound 1317 DEBUG_ONLY( 1318 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1319 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1320 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1321 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1322 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1323 } 1324 ); 1325 1326 1327 // Mark that we don't have an lwp or thread id yet. 1328 // In case we attempt to set the priority before the thread starts. 1329 osthread->set_lwp_id(-1); 1330 osthread->set_thread_id(-1); 1331 1332 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1333 if (status != 0) { 1334 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1335 perror("os::create_thread"); 1336 } 1337 thread->set_osthread(NULL); 1338 // Need to clean up stuff we've allocated so far 1339 delete osthread; 1340 return false; 1341 } 1342 1343 Atomic::inc(&os::Solaris::_os_thread_count); 1344 1345 // Store info on the Solaris thread into the OSThread 1346 osthread->set_thread_id(tid); 1347 1348 // Remember that we created this thread so we can set priority on it 1349 osthread->set_vm_created(); 1350 1351 // Set the default thread priority otherwise use NormalPriority 1352 1353 if ( UseThreadPriorities ) { 1354 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1355 java_to_os_priority[NormPriority] : 1356 DefaultThreadPriority); 1357 } 1358 1359 // Initial thread state is INITIALIZED, not SUSPENDED 1360 osthread->set_state(INITIALIZED); 1361 1362 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1363 return true; 1364} 1365 1366/* defined for >= Solaris 10. This allows builds on earlier versions 1367 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1368 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1369 * and -XX:+UseAltSigs does nothing since these should have no conflict 1370 */ 1371#if !defined(SIGJVM1) 1372#define SIGJVM1 39 1373#define SIGJVM2 40 1374#endif 1375 1376debug_only(static bool signal_sets_initialized = false); 1377static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1378int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1379int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1380 1381bool os::Solaris::is_sig_ignored(int sig) { 1382 struct sigaction oact; 1383 sigaction(sig, (struct sigaction*)NULL, &oact); 1384 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1385 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1386 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1387 return true; 1388 else 1389 return false; 1390} 1391 1392// Note: SIGRTMIN is a macro that calls sysconf() so it will 1393// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1394static bool isJVM1available() { 1395 return SIGJVM1 < SIGRTMIN; 1396} 1397 1398void os::Solaris::signal_sets_init() { 1399 // Should also have an assertion stating we are still single-threaded. 1400 assert(!signal_sets_initialized, "Already initialized"); 1401 // Fill in signals that are necessarily unblocked for all threads in 1402 // the VM. Currently, we unblock the following signals: 1403 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1404 // by -Xrs (=ReduceSignalUsage)); 1405 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1406 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1407 // the dispositions or masks wrt these signals. 1408 // Programs embedding the VM that want to use the above signals for their 1409 // own purposes must, at this time, use the "-Xrs" option to prevent 1410 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1411 // (See bug 4345157, and other related bugs). 1412 // In reality, though, unblocking these signals is really a nop, since 1413 // these signals are not blocked by default. 1414 sigemptyset(&unblocked_sigs); 1415 sigemptyset(&allowdebug_blocked_sigs); 1416 sigaddset(&unblocked_sigs, SIGILL); 1417 sigaddset(&unblocked_sigs, SIGSEGV); 1418 sigaddset(&unblocked_sigs, SIGBUS); 1419 sigaddset(&unblocked_sigs, SIGFPE); 1420 1421 if (isJVM1available) { 1422 os::Solaris::set_SIGinterrupt(SIGJVM1); 1423 os::Solaris::set_SIGasync(SIGJVM2); 1424 } else if (UseAltSigs) { 1425 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1426 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1427 } else { 1428 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1429 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1430 } 1431 1432 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1433 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1434 1435 if (!ReduceSignalUsage) { 1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1437 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1439 } 1440 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1441 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1442 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1443 } 1444 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1445 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1446 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1447 } 1448 } 1449 // Fill in signals that are blocked by all but the VM thread. 1450 sigemptyset(&vm_sigs); 1451 if (!ReduceSignalUsage) 1452 sigaddset(&vm_sigs, BREAK_SIGNAL); 1453 debug_only(signal_sets_initialized = true); 1454 1455 // For diagnostics only used in run_periodic_checks 1456 sigemptyset(&check_signal_done); 1457} 1458 1459// These are signals that are unblocked while a thread is running Java. 1460// (For some reason, they get blocked by default.) 1461sigset_t* os::Solaris::unblocked_signals() { 1462 assert(signal_sets_initialized, "Not initialized"); 1463 return &unblocked_sigs; 1464} 1465 1466// These are the signals that are blocked while a (non-VM) thread is 1467// running Java. Only the VM thread handles these signals. 1468sigset_t* os::Solaris::vm_signals() { 1469 assert(signal_sets_initialized, "Not initialized"); 1470 return &vm_sigs; 1471} 1472 1473// These are signals that are blocked during cond_wait to allow debugger in 1474sigset_t* os::Solaris::allowdebug_blocked_signals() { 1475 assert(signal_sets_initialized, "Not initialized"); 1476 return &allowdebug_blocked_sigs; 1477} 1478 1479 1480void _handle_uncaught_cxx_exception() { 1481 VMError err("An uncaught C++ exception"); 1482 err.report_and_die(); 1483} 1484 1485 1486// First crack at OS-specific initialization, from inside the new thread. 1487void os::initialize_thread() { 1488 int r = thr_main() ; 1489 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1490 if (r) { 1491 JavaThread* jt = (JavaThread *)Thread::current(); 1492 assert(jt != NULL,"Sanity check"); 1493 size_t stack_size; 1494 address base = jt->stack_base(); 1495 if (Arguments::created_by_java_launcher()) { 1496 // Use 2MB to allow for Solaris 7 64 bit mode. 1497 stack_size = JavaThread::stack_size_at_create() == 0 1498 ? 2048*K : JavaThread::stack_size_at_create(); 1499 1500 // There are rare cases when we may have already used more than 1501 // the basic stack size allotment before this method is invoked. 1502 // Attempt to allow for a normally sized java_stack. 1503 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1504 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1505 } else { 1506 // 6269555: If we were not created by a Java launcher, i.e. if we are 1507 // running embedded in a native application, treat the primordial thread 1508 // as much like a native attached thread as possible. This means using 1509 // the current stack size from thr_stksegment(), unless it is too large 1510 // to reliably setup guard pages. A reasonable max size is 8MB. 1511 size_t current_size = current_stack_size(); 1512 // This should never happen, but just in case.... 1513 if (current_size == 0) current_size = 2 * K * K; 1514 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1515 } 1516 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1517 stack_size = (size_t)(base - bottom); 1518 1519 assert(stack_size > 0, "Stack size calculation problem"); 1520 1521 if (stack_size > jt->stack_size()) { 1522 NOT_PRODUCT( 1523 struct rlimit limits; 1524 getrlimit(RLIMIT_STACK, &limits); 1525 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1526 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1527 ) 1528 tty->print_cr( 1529 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1530 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1531 "See limit(1) to increase the stack size limit.", 1532 stack_size / K, jt->stack_size() / K); 1533 vm_exit(1); 1534 } 1535 assert(jt->stack_size() >= stack_size, 1536 "Attempt to map more stack than was allocated"); 1537 jt->set_stack_size(stack_size); 1538 } 1539 1540 // 5/22/01: Right now alternate signal stacks do not handle 1541 // throwing stack overflow exceptions, see bug 4463178 1542 // Until a fix is found for this, T2 will NOT imply alternate signal 1543 // stacks. 1544 // If using T2 libthread threads, install an alternate signal stack. 1545 // Because alternate stacks associate with LWPs on Solaris, 1546 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1547 // we prefer to explicitly stack bang. 1548 // If not using T2 libthread, but using UseBoundThreads any threads 1549 // (primordial thread, jni_attachCurrentThread) we do not create, 1550 // probably are not bound, therefore they can not have an alternate 1551 // signal stack. Since our stack banging code is generated and 1552 // is shared across threads, all threads must be bound to allow 1553 // using alternate signal stacks. The alternative is to interpose 1554 // on _lwp_create to associate an alt sig stack with each LWP, 1555 // and this could be a problem when the JVM is embedded. 1556 // We would prefer to use alternate signal stacks with T2 1557 // Since there is currently no accurate way to detect T2 1558 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1559 // on installing alternate signal stacks 1560 1561 1562 // 05/09/03: removed alternate signal stack support for Solaris 1563 // The alternate signal stack mechanism is no longer needed to 1564 // handle stack overflow. This is now handled by allocating 1565 // guard pages (red zone) and stackbanging. 1566 // Initially the alternate signal stack mechanism was removed because 1567 // it did not work with T1 llibthread. Alternate 1568 // signal stacks MUST have all threads bound to lwps. Applications 1569 // can create their own threads and attach them without their being 1570 // bound under T1. This is frequently the case for the primordial thread. 1571 // If we were ever to reenable this mechanism we would need to 1572 // use the dynamic check for T2 libthread. 1573 1574 os::Solaris::init_thread_fpu_state(); 1575 std::set_terminate(_handle_uncaught_cxx_exception); 1576} 1577 1578 1579 1580// Free Solaris resources related to the OSThread 1581void os::free_thread(OSThread* osthread) { 1582 assert(osthread != NULL, "os::free_thread but osthread not set"); 1583 1584 1585 // We are told to free resources of the argument thread, 1586 // but we can only really operate on the current thread. 1587 // The main thread must take the VMThread down synchronously 1588 // before the main thread exits and frees up CodeHeap 1589 guarantee((Thread::current()->osthread() == osthread 1590 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1591 if (Thread::current()->osthread() == osthread) { 1592 // Restore caller's signal mask 1593 sigset_t sigmask = osthread->caller_sigmask(); 1594 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1595 } 1596 delete osthread; 1597} 1598 1599void os::pd_start_thread(Thread* thread) { 1600 int status = thr_continue(thread->osthread()->thread_id()); 1601 assert_status(status == 0, status, "thr_continue failed"); 1602} 1603 1604 1605intx os::current_thread_id() { 1606 return (intx)thr_self(); 1607} 1608 1609static pid_t _initial_pid = 0; 1610 1611int os::current_process_id() { 1612 return (int)(_initial_pid ? _initial_pid : getpid()); 1613} 1614 1615int os::allocate_thread_local_storage() { 1616 // %%% in Win32 this allocates a memory segment pointed to by a 1617 // register. Dan Stein can implement a similar feature in 1618 // Solaris. Alternatively, the VM can do the same thing 1619 // explicitly: malloc some storage and keep the pointer in a 1620 // register (which is part of the thread's context) (or keep it 1621 // in TLS). 1622 // %%% In current versions of Solaris, thr_self and TSD can 1623 // be accessed via short sequences of displaced indirections. 1624 // The value of thr_self is available as %g7(36). 1625 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1626 // assuming that the current thread already has a value bound to k. 1627 // It may be worth experimenting with such access patterns, 1628 // and later having the parameters formally exported from a Solaris 1629 // interface. I think, however, that it will be faster to 1630 // maintain the invariant that %g2 always contains the 1631 // JavaThread in Java code, and have stubs simply 1632 // treat %g2 as a caller-save register, preserving it in a %lN. 1633 thread_key_t tk; 1634 if (thr_keycreate( &tk, NULL ) ) 1635 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1636 "(%s)", strerror(errno))); 1637 return int(tk); 1638} 1639 1640void os::free_thread_local_storage(int index) { 1641 // %%% don't think we need anything here 1642 // if ( pthread_key_delete((pthread_key_t) tk) ) 1643 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1644} 1645 1646#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1647 // small number - point is NO swap space available 1648void os::thread_local_storage_at_put(int index, void* value) { 1649 // %%% this is used only in threadLocalStorage.cpp 1650 if (thr_setspecific((thread_key_t)index, value)) { 1651 if (errno == ENOMEM) { 1652 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1653 } else { 1654 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1655 "(%s)", strerror(errno))); 1656 } 1657 } else { 1658 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1659 } 1660} 1661 1662// This function could be called before TLS is initialized, for example, when 1663// VM receives an async signal or when VM causes a fatal error during 1664// initialization. Return NULL if thr_getspecific() fails. 1665void* os::thread_local_storage_at(int index) { 1666 // %%% this is used only in threadLocalStorage.cpp 1667 void* r = NULL; 1668 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1669} 1670 1671 1672const int NANOSECS_PER_MILLISECS = 1000000; 1673// gethrtime can move backwards if read from one cpu and then a different cpu 1674// getTimeNanos is guaranteed to not move backward on Solaris 1675// local spinloop created as faster for a CAS on an int than 1676// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1677// supported on sparc v8 or pre supports_cx8 intel boxes. 1678// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1679// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1680inline hrtime_t oldgetTimeNanos() { 1681 int gotlock = LOCK_INVALID; 1682 hrtime_t newtime = gethrtime(); 1683 1684 for (;;) { 1685// grab lock for max_hrtime 1686 int curlock = max_hrtime_lock; 1687 if (curlock & LOCK_BUSY) continue; 1688 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1689 if (newtime > max_hrtime) { 1690 max_hrtime = newtime; 1691 } else { 1692 newtime = max_hrtime; 1693 } 1694 // release lock 1695 max_hrtime_lock = LOCK_FREE; 1696 return newtime; 1697 } 1698} 1699// gethrtime can move backwards if read from one cpu and then a different cpu 1700// getTimeNanos is guaranteed to not move backward on Solaris 1701inline hrtime_t getTimeNanos() { 1702 if (VM_Version::supports_cx8()) { 1703 const hrtime_t now = gethrtime(); 1704 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1705 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1706 if (now <= prev) return prev; // same or retrograde time; 1707 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1708 assert(obsv >= prev, "invariant"); // Monotonicity 1709 // If the CAS succeeded then we're done and return "now". 1710 // If the CAS failed and the observed value "obs" is >= now then 1711 // we should return "obs". If the CAS failed and now > obs > prv then 1712 // some other thread raced this thread and installed a new value, in which case 1713 // we could either (a) retry the entire operation, (b) retry trying to install now 1714 // or (c) just return obs. We use (c). No loop is required although in some cases 1715 // we might discard a higher "now" value in deference to a slightly lower but freshly 1716 // installed obs value. That's entirely benign -- it admits no new orderings compared 1717 // to (a) or (b) -- and greatly reduces coherence traffic. 1718 // We might also condition (c) on the magnitude of the delta between obs and now. 1719 // Avoiding excessive CAS operations to hot RW locations is critical. 1720 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1721 return (prev == obsv) ? now : obsv ; 1722 } else { 1723 return oldgetTimeNanos(); 1724 } 1725} 1726 1727// Time since start-up in seconds to a fine granularity. 1728// Used by VMSelfDestructTimer and the MemProfiler. 1729double os::elapsedTime() { 1730 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1731} 1732 1733jlong os::elapsed_counter() { 1734 return (jlong)(getTimeNanos() - first_hrtime); 1735} 1736 1737jlong os::elapsed_frequency() { 1738 return hrtime_hz; 1739} 1740 1741// Return the real, user, and system times in seconds from an 1742// arbitrary fixed point in the past. 1743bool os::getTimesSecs(double* process_real_time, 1744 double* process_user_time, 1745 double* process_system_time) { 1746 struct tms ticks; 1747 clock_t real_ticks = times(&ticks); 1748 1749 if (real_ticks == (clock_t) (-1)) { 1750 return false; 1751 } else { 1752 double ticks_per_second = (double) clock_tics_per_sec; 1753 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1754 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1755 // For consistency return the real time from getTimeNanos() 1756 // converted to seconds. 1757 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1758 1759 return true; 1760 } 1761} 1762 1763bool os::supports_vtime() { return true; } 1764 1765bool os::enable_vtime() { 1766 int fd = ::open("/proc/self/ctl", O_WRONLY); 1767 if (fd == -1) 1768 return false; 1769 1770 long cmd[] = { PCSET, PR_MSACCT }; 1771 int res = ::write(fd, cmd, sizeof(long) * 2); 1772 ::close(fd); 1773 if (res != sizeof(long) * 2) 1774 return false; 1775 1776 return true; 1777} 1778 1779bool os::vtime_enabled() { 1780 int fd = ::open("/proc/self/status", O_RDONLY); 1781 if (fd == -1) 1782 return false; 1783 1784 pstatus_t status; 1785 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1786 ::close(fd); 1787 if (res != sizeof(pstatus_t)) 1788 return false; 1789 1790 return status.pr_flags & PR_MSACCT; 1791} 1792 1793double os::elapsedVTime() { 1794 return (double)gethrvtime() / (double)hrtime_hz; 1795} 1796 1797// Used internally for comparisons only 1798// getTimeMillis guaranteed to not move backwards on Solaris 1799jlong getTimeMillis() { 1800 jlong nanotime = getTimeNanos(); 1801 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1802} 1803 1804// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1805jlong os::javaTimeMillis() { 1806 timeval t; 1807 if (gettimeofday( &t, NULL) == -1) 1808 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1809 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1810} 1811 1812jlong os::javaTimeNanos() { 1813 return (jlong)getTimeNanos(); 1814} 1815 1816void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1817 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1818 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1819 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1820 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1821} 1822 1823char * os::local_time_string(char *buf, size_t buflen) { 1824 struct tm t; 1825 time_t long_time; 1826 time(&long_time); 1827 localtime_r(&long_time, &t); 1828 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1829 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1830 t.tm_hour, t.tm_min, t.tm_sec); 1831 return buf; 1832} 1833 1834// Note: os::shutdown() might be called very early during initialization, or 1835// called from signal handler. Before adding something to os::shutdown(), make 1836// sure it is async-safe and can handle partially initialized VM. 1837void os::shutdown() { 1838 1839 // allow PerfMemory to attempt cleanup of any persistent resources 1840 perfMemory_exit(); 1841 1842 // needs to remove object in file system 1843 AttachListener::abort(); 1844 1845 // flush buffered output, finish log files 1846 ostream_abort(); 1847 1848 // Check for abort hook 1849 abort_hook_t abort_hook = Arguments::abort_hook(); 1850 if (abort_hook != NULL) { 1851 abort_hook(); 1852 } 1853} 1854 1855// Note: os::abort() might be called very early during initialization, or 1856// called from signal handler. Before adding something to os::abort(), make 1857// sure it is async-safe and can handle partially initialized VM. 1858void os::abort(bool dump_core) { 1859 os::shutdown(); 1860 if (dump_core) { 1861#ifndef PRODUCT 1862 fdStream out(defaultStream::output_fd()); 1863 out.print_raw("Current thread is "); 1864 char buf[16]; 1865 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1866 out.print_raw_cr(buf); 1867 out.print_raw_cr("Dumping core ..."); 1868#endif 1869 ::abort(); // dump core (for debugging) 1870 } 1871 1872 ::exit(1); 1873} 1874 1875// Die immediately, no exit hook, no abort hook, no cleanup. 1876void os::die() { 1877 _exit(-1); 1878} 1879 1880// unused 1881void os::set_error_file(const char *logfile) {} 1882 1883// DLL functions 1884 1885const char* os::dll_file_extension() { return ".so"; } 1886 1887const char* os::get_temp_directory() { 1888 const char *prop = Arguments::get_property("java.io.tmpdir"); 1889 return prop == NULL ? "/tmp" : prop; 1890} 1891 1892static bool file_exists(const char* filename) { 1893 struct stat statbuf; 1894 if (filename == NULL || strlen(filename) == 0) { 1895 return false; 1896 } 1897 return os::stat(filename, &statbuf) == 0; 1898} 1899 1900void os::dll_build_name(char* buffer, size_t buflen, 1901 const char* pname, const char* fname) { 1902 const size_t pnamelen = pname ? strlen(pname) : 0; 1903 1904 // Quietly truncate on buffer overflow. Should be an error. 1905 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1906 *buffer = '\0'; 1907 return; 1908 } 1909 1910 if (pnamelen == 0) { 1911 snprintf(buffer, buflen, "lib%s.so", fname); 1912 } else if (strchr(pname, *os::path_separator()) != NULL) { 1913 int n; 1914 char** pelements = split_path(pname, &n); 1915 for (int i = 0 ; i < n ; i++) { 1916 // really shouldn't be NULL but what the heck, check can't hurt 1917 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1918 continue; // skip the empty path values 1919 } 1920 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1921 if (file_exists(buffer)) { 1922 break; 1923 } 1924 } 1925 // release the storage 1926 for (int i = 0 ; i < n ; i++) { 1927 if (pelements[i] != NULL) { 1928 FREE_C_HEAP_ARRAY(char, pelements[i]); 1929 } 1930 } 1931 if (pelements != NULL) { 1932 FREE_C_HEAP_ARRAY(char*, pelements); 1933 } 1934 } else { 1935 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1936 } 1937} 1938 1939const char* os::get_current_directory(char *buf, int buflen) { 1940 return getcwd(buf, buflen); 1941} 1942 1943// check if addr is inside libjvm[_g].so 1944bool os::address_is_in_vm(address addr) { 1945 static address libjvm_base_addr; 1946 Dl_info dlinfo; 1947 1948 if (libjvm_base_addr == NULL) { 1949 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1950 libjvm_base_addr = (address)dlinfo.dli_fbase; 1951 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1952 } 1953 1954 if (dladdr((void *)addr, &dlinfo)) { 1955 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1956 } 1957 1958 return false; 1959} 1960 1961typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1962static dladdr1_func_type dladdr1_func = NULL; 1963 1964bool os::dll_address_to_function_name(address addr, char *buf, 1965 int buflen, int * offset) { 1966 Dl_info dlinfo; 1967 1968 // dladdr1_func was initialized in os::init() 1969 if (dladdr1_func){ 1970 // yes, we have dladdr1 1971 1972 // Support for dladdr1 is checked at runtime; it may be 1973 // available even if the vm is built on a machine that does 1974 // not have dladdr1 support. Make sure there is a value for 1975 // RTLD_DL_SYMENT. 1976 #ifndef RTLD_DL_SYMENT 1977 #define RTLD_DL_SYMENT 1 1978 #endif 1979 Sym * info; 1980 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1981 RTLD_DL_SYMENT)) { 1982 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1983 if (buf != NULL) { 1984 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1985 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1986 } 1987 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1988 return true; 1989 } 1990 } 1991 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1992 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1993 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 1994 return true; 1995 } 1996 } 1997 if (buf != NULL) buf[0] = '\0'; 1998 if (offset != NULL) *offset = -1; 1999 return false; 2000 } else { 2001 // no, only dladdr is available 2002 if (dladdr((void *)addr, &dlinfo)) { 2003 if (buf != NULL) { 2004 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2005 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2006 } 2007 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2008 return true; 2009 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2010 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2011 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 2012 return true; 2013 } 2014 } 2015 if (buf != NULL) buf[0] = '\0'; 2016 if (offset != NULL) *offset = -1; 2017 return false; 2018 } 2019} 2020 2021bool os::dll_address_to_library_name(address addr, char* buf, 2022 int buflen, int* offset) { 2023 Dl_info dlinfo; 2024 2025 if (dladdr((void*)addr, &dlinfo)){ 2026 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2027 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2028 return true; 2029 } else { 2030 if (buf) buf[0] = '\0'; 2031 if (offset) *offset = -1; 2032 return false; 2033 } 2034} 2035 2036// Prints the names and full paths of all opened dynamic libraries 2037// for current process 2038void os::print_dll_info(outputStream * st) { 2039 Dl_info dli; 2040 void *handle; 2041 Link_map *map; 2042 Link_map *p; 2043 2044 st->print_cr("Dynamic libraries:"); st->flush(); 2045 2046 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2047 st->print_cr("Error: Cannot print dynamic libraries."); 2048 return; 2049 } 2050 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2051 if (handle == NULL) { 2052 st->print_cr("Error: Cannot print dynamic libraries."); 2053 return; 2054 } 2055 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2056 if (map == NULL) { 2057 st->print_cr("Error: Cannot print dynamic libraries."); 2058 return; 2059 } 2060 2061 while (map->l_prev != NULL) 2062 map = map->l_prev; 2063 2064 while (map != NULL) { 2065 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2066 map = map->l_next; 2067 } 2068 2069 dlclose(handle); 2070} 2071 2072 // Loads .dll/.so and 2073 // in case of error it checks if .dll/.so was built for the 2074 // same architecture as Hotspot is running on 2075 2076void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2077{ 2078 void * result= ::dlopen(filename, RTLD_LAZY); 2079 if (result != NULL) { 2080 // Successful loading 2081 return result; 2082 } 2083 2084 Elf32_Ehdr elf_head; 2085 2086 // Read system error message into ebuf 2087 // It may or may not be overwritten below 2088 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2089 ebuf[ebuflen-1]='\0'; 2090 int diag_msg_max_length=ebuflen-strlen(ebuf); 2091 char* diag_msg_buf=ebuf+strlen(ebuf); 2092 2093 if (diag_msg_max_length==0) { 2094 // No more space in ebuf for additional diagnostics message 2095 return NULL; 2096 } 2097 2098 2099 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2100 2101 if (file_descriptor < 0) { 2102 // Can't open library, report dlerror() message 2103 return NULL; 2104 } 2105 2106 bool failed_to_read_elf_head= 2107 (sizeof(elf_head)!= 2108 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2109 2110 ::close(file_descriptor); 2111 if (failed_to_read_elf_head) { 2112 // file i/o error - report dlerror() msg 2113 return NULL; 2114 } 2115 2116 typedef struct { 2117 Elf32_Half code; // Actual value as defined in elf.h 2118 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2119 char elf_class; // 32 or 64 bit 2120 char endianess; // MSB or LSB 2121 char* name; // String representation 2122 } arch_t; 2123 2124 static const arch_t arch_array[]={ 2125 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2126 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2127 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2128 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2129 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2130 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2131 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2132 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2133 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2134 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2135 }; 2136 2137 #if (defined IA32) 2138 static Elf32_Half running_arch_code=EM_386; 2139 #elif (defined AMD64) 2140 static Elf32_Half running_arch_code=EM_X86_64; 2141 #elif (defined IA64) 2142 static Elf32_Half running_arch_code=EM_IA_64; 2143 #elif (defined __sparc) && (defined _LP64) 2144 static Elf32_Half running_arch_code=EM_SPARCV9; 2145 #elif (defined __sparc) && (!defined _LP64) 2146 static Elf32_Half running_arch_code=EM_SPARC; 2147 #elif (defined __powerpc64__) 2148 static Elf32_Half running_arch_code=EM_PPC64; 2149 #elif (defined __powerpc__) 2150 static Elf32_Half running_arch_code=EM_PPC; 2151 #elif (defined ARM) 2152 static Elf32_Half running_arch_code=EM_ARM; 2153 #else 2154 #error Method os::dll_load requires that one of following is defined:\ 2155 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2156 #endif 2157 2158 // Identify compatability class for VM's architecture and library's architecture 2159 // Obtain string descriptions for architectures 2160 2161 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2162 int running_arch_index=-1; 2163 2164 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2165 if (running_arch_code == arch_array[i].code) { 2166 running_arch_index = i; 2167 } 2168 if (lib_arch.code == arch_array[i].code) { 2169 lib_arch.compat_class = arch_array[i].compat_class; 2170 lib_arch.name = arch_array[i].name; 2171 } 2172 } 2173 2174 assert(running_arch_index != -1, 2175 "Didn't find running architecture code (running_arch_code) in arch_array"); 2176 if (running_arch_index == -1) { 2177 // Even though running architecture detection failed 2178 // we may still continue with reporting dlerror() message 2179 return NULL; 2180 } 2181 2182 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2183 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2184 return NULL; 2185 } 2186 2187 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2188 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2189 return NULL; 2190 } 2191 2192 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2193 if ( lib_arch.name!=NULL ) { 2194 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2195 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2196 lib_arch.name, arch_array[running_arch_index].name); 2197 } else { 2198 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2199 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2200 lib_arch.code, 2201 arch_array[running_arch_index].name); 2202 } 2203 } 2204 2205 return NULL; 2206} 2207 2208void* os::dll_lookup(void* handle, const char* name) { 2209 return dlsym(handle, name); 2210} 2211 2212int os::stat(const char *path, struct stat *sbuf) { 2213 char pathbuf[MAX_PATH]; 2214 if (strlen(path) > MAX_PATH - 1) { 2215 errno = ENAMETOOLONG; 2216 return -1; 2217 } 2218 os::native_path(strcpy(pathbuf, path)); 2219 return ::stat(pathbuf, sbuf); 2220} 2221 2222static bool _print_ascii_file(const char* filename, outputStream* st) { 2223 int fd = ::open(filename, O_RDONLY); 2224 if (fd == -1) { 2225 return false; 2226 } 2227 2228 char buf[32]; 2229 int bytes; 2230 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2231 st->print_raw(buf, bytes); 2232 } 2233 2234 ::close(fd); 2235 2236 return true; 2237} 2238 2239void os::print_os_info(outputStream* st) { 2240 st->print("OS:"); 2241 2242 if (!_print_ascii_file("/etc/release", st)) { 2243 st->print("Solaris"); 2244 } 2245 st->cr(); 2246 2247 // kernel 2248 st->print("uname:"); 2249 struct utsname name; 2250 uname(&name); 2251 st->print(name.sysname); st->print(" "); 2252 st->print(name.release); st->print(" "); 2253 st->print(name.version); st->print(" "); 2254 st->print(name.machine); 2255 2256 // libthread 2257 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2258 else st->print(" (T1 libthread)"); 2259 st->cr(); 2260 2261 // rlimit 2262 st->print("rlimit:"); 2263 struct rlimit rlim; 2264 2265 st->print(" STACK "); 2266 getrlimit(RLIMIT_STACK, &rlim); 2267 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2268 else st->print("%uk", rlim.rlim_cur >> 10); 2269 2270 st->print(", CORE "); 2271 getrlimit(RLIMIT_CORE, &rlim); 2272 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2273 else st->print("%uk", rlim.rlim_cur >> 10); 2274 2275 st->print(", NOFILE "); 2276 getrlimit(RLIMIT_NOFILE, &rlim); 2277 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2278 else st->print("%d", rlim.rlim_cur); 2279 2280 st->print(", AS "); 2281 getrlimit(RLIMIT_AS, &rlim); 2282 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2283 else st->print("%uk", rlim.rlim_cur >> 10); 2284 st->cr(); 2285 2286 // load average 2287 st->print("load average:"); 2288 double loadavg[3]; 2289 os::loadavg(loadavg, 3); 2290 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2291 st->cr(); 2292} 2293 2294 2295static bool check_addr0(outputStream* st) { 2296 jboolean status = false; 2297 int fd = ::open("/proc/self/map",O_RDONLY); 2298 if (fd >= 0) { 2299 prmap_t p; 2300 while(::read(fd, &p, sizeof(p)) > 0) { 2301 if (p.pr_vaddr == 0x0) { 2302 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2303 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2304 st->print("Access:"); 2305 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2306 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2307 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2308 st->cr(); 2309 status = true; 2310 } 2311 ::close(fd); 2312 } 2313 } 2314 return status; 2315} 2316 2317void os::print_memory_info(outputStream* st) { 2318 st->print("Memory:"); 2319 st->print(" %dk page", os::vm_page_size()>>10); 2320 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2321 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2322 st->cr(); 2323 (void) check_addr0(st); 2324} 2325 2326// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2327// but they're the same for all the solaris architectures that we support. 2328const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2329 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2330 "ILL_COPROC", "ILL_BADSTK" }; 2331 2332const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2333 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2334 "FPE_FLTINV", "FPE_FLTSUB" }; 2335 2336const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2337 2338const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2339 2340void os::print_siginfo(outputStream* st, void* siginfo) { 2341 st->print("siginfo:"); 2342 2343 const int buflen = 100; 2344 char buf[buflen]; 2345 siginfo_t *si = (siginfo_t*)siginfo; 2346 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2347 char *err = strerror(si->si_errno); 2348 if (si->si_errno != 0 && err != NULL) { 2349 st->print("si_errno=%s", err); 2350 } else { 2351 st->print("si_errno=%d", si->si_errno); 2352 } 2353 const int c = si->si_code; 2354 assert(c > 0, "unexpected si_code"); 2355 switch (si->si_signo) { 2356 case SIGILL: 2357 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2358 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2359 break; 2360 case SIGFPE: 2361 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2362 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2363 break; 2364 case SIGSEGV: 2365 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2366 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2367 break; 2368 case SIGBUS: 2369 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2370 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2371 break; 2372 default: 2373 st->print(", si_code=%d", si->si_code); 2374 // no si_addr 2375 } 2376 2377 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2378 UseSharedSpaces) { 2379 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2380 if (mapinfo->is_in_shared_space(si->si_addr)) { 2381 st->print("\n\nError accessing class data sharing archive." \ 2382 " Mapped file inaccessible during execution, " \ 2383 " possible disk/network problem."); 2384 } 2385 } 2386 st->cr(); 2387} 2388 2389// Moved from whole group, because we need them here for diagnostic 2390// prints. 2391#define OLDMAXSIGNUM 32 2392static int Maxsignum = 0; 2393static int *ourSigFlags = NULL; 2394 2395extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2396 2397int os::Solaris::get_our_sigflags(int sig) { 2398 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2399 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2400 return ourSigFlags[sig]; 2401} 2402 2403void os::Solaris::set_our_sigflags(int sig, int flags) { 2404 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2405 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2406 ourSigFlags[sig] = flags; 2407} 2408 2409 2410static const char* get_signal_handler_name(address handler, 2411 char* buf, int buflen) { 2412 int offset; 2413 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2414 if (found) { 2415 // skip directory names 2416 const char *p1, *p2; 2417 p1 = buf; 2418 size_t len = strlen(os::file_separator()); 2419 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2420 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2421 } else { 2422 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2423 } 2424 return buf; 2425} 2426 2427static void print_signal_handler(outputStream* st, int sig, 2428 char* buf, size_t buflen) { 2429 struct sigaction sa; 2430 2431 sigaction(sig, NULL, &sa); 2432 2433 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2434 2435 address handler = (sa.sa_flags & SA_SIGINFO) 2436 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2437 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2438 2439 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2440 st->print("SIG_DFL"); 2441 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2442 st->print("SIG_IGN"); 2443 } else { 2444 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2445 } 2446 2447 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2448 2449 address rh = VMError::get_resetted_sighandler(sig); 2450 // May be, handler was resetted by VMError? 2451 if(rh != NULL) { 2452 handler = rh; 2453 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2454 } 2455 2456 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2457 2458 // Check: is it our handler? 2459 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2460 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2461 // It is our signal handler 2462 // check for flags 2463 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2464 st->print( 2465 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2466 os::Solaris::get_our_sigflags(sig)); 2467 } 2468 } 2469 st->cr(); 2470} 2471 2472void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2473 st->print_cr("Signal Handlers:"); 2474 print_signal_handler(st, SIGSEGV, buf, buflen); 2475 print_signal_handler(st, SIGBUS , buf, buflen); 2476 print_signal_handler(st, SIGFPE , buf, buflen); 2477 print_signal_handler(st, SIGPIPE, buf, buflen); 2478 print_signal_handler(st, SIGXFSZ, buf, buflen); 2479 print_signal_handler(st, SIGILL , buf, buflen); 2480 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2481 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2482 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2483 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2484 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2485 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2486 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2487 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2488} 2489 2490static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2491 2492// Find the full path to the current module, libjvm.so or libjvm_g.so 2493void os::jvm_path(char *buf, jint buflen) { 2494 // Error checking. 2495 if (buflen < MAXPATHLEN) { 2496 assert(false, "must use a large-enough buffer"); 2497 buf[0] = '\0'; 2498 return; 2499 } 2500 // Lazy resolve the path to current module. 2501 if (saved_jvm_path[0] != 0) { 2502 strcpy(buf, saved_jvm_path); 2503 return; 2504 } 2505 2506 Dl_info dlinfo; 2507 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2508 assert(ret != 0, "cannot locate libjvm"); 2509 realpath((char *)dlinfo.dli_fname, buf); 2510 2511 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2512 // Support for the gamma launcher. Typical value for buf is 2513 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2514 // the right place in the string, then assume we are installed in a JDK and 2515 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2516 // up the path so it looks like libjvm.so is installed there (append a 2517 // fake suffix hotspot/libjvm.so). 2518 const char *p = buf + strlen(buf) - 1; 2519 for (int count = 0; p > buf && count < 5; ++count) { 2520 for (--p; p > buf && *p != '/'; --p) 2521 /* empty */ ; 2522 } 2523 2524 if (strncmp(p, "/jre/lib/", 9) != 0) { 2525 // Look for JAVA_HOME in the environment. 2526 char* java_home_var = ::getenv("JAVA_HOME"); 2527 if (java_home_var != NULL && java_home_var[0] != 0) { 2528 char cpu_arch[12]; 2529 char* jrelib_p; 2530 int len; 2531 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2532#ifdef _LP64 2533 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2534 if (strcmp(cpu_arch, "sparc") == 0) { 2535 strcat(cpu_arch, "v9"); 2536 } else if (strcmp(cpu_arch, "i386") == 0) { 2537 strcpy(cpu_arch, "amd64"); 2538 } 2539#endif 2540 // Check the current module name "libjvm.so" or "libjvm_g.so". 2541 p = strrchr(buf, '/'); 2542 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2543 p = strstr(p, "_g") ? "_g" : ""; 2544 2545 realpath(java_home_var, buf); 2546 // determine if this is a legacy image or modules image 2547 // modules image doesn't have "jre" subdirectory 2548 len = strlen(buf); 2549 jrelib_p = buf + len; 2550 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2551 if (0 != access(buf, F_OK)) { 2552 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2553 } 2554 2555 if (0 == access(buf, F_OK)) { 2556 // Use current module name "libjvm[_g].so" instead of 2557 // "libjvm"debug_only("_g")".so" since for fastdebug version 2558 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2559 len = strlen(buf); 2560 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p); 2561 } else { 2562 // Go back to path of .so 2563 realpath((char *)dlinfo.dli_fname, buf); 2564 } 2565 } 2566 } 2567 } 2568 2569 strcpy(saved_jvm_path, buf); 2570} 2571 2572 2573void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2574 // no prefix required, not even "_" 2575} 2576 2577 2578void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2579 // no suffix required 2580} 2581 2582// This method is a copy of JDK's sysGetLastErrorString 2583// from src/solaris/hpi/src/system_md.c 2584 2585size_t os::lasterror(char *buf, size_t len) { 2586 2587 if (errno == 0) return 0; 2588 2589 const char *s = ::strerror(errno); 2590 size_t n = ::strlen(s); 2591 if (n >= len) { 2592 n = len - 1; 2593 } 2594 ::strncpy(buf, s, n); 2595 buf[n] = '\0'; 2596 return n; 2597} 2598 2599 2600// sun.misc.Signal 2601 2602extern "C" { 2603 static void UserHandler(int sig, void *siginfo, void *context) { 2604 // Ctrl-C is pressed during error reporting, likely because the error 2605 // handler fails to abort. Let VM die immediately. 2606 if (sig == SIGINT && is_error_reported()) { 2607 os::die(); 2608 } 2609 2610 os::signal_notify(sig); 2611 // We do not need to reinstate the signal handler each time... 2612 } 2613} 2614 2615void* os::user_handler() { 2616 return CAST_FROM_FN_PTR(void*, UserHandler); 2617} 2618 2619extern "C" { 2620 typedef void (*sa_handler_t)(int); 2621 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2622} 2623 2624void* os::signal(int signal_number, void* handler) { 2625 struct sigaction sigAct, oldSigAct; 2626 sigfillset(&(sigAct.sa_mask)); 2627 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2628 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2629 2630 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2631 // -1 means registration failed 2632 return (void *)-1; 2633 2634 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2635} 2636 2637void os::signal_raise(int signal_number) { 2638 raise(signal_number); 2639} 2640 2641/* 2642 * The following code is moved from os.cpp for making this 2643 * code platform specific, which it is by its very nature. 2644 */ 2645 2646// a counter for each possible signal value 2647static int Sigexit = 0; 2648static int Maxlibjsigsigs; 2649static jint *pending_signals = NULL; 2650static int *preinstalled_sigs = NULL; 2651static struct sigaction *chainedsigactions = NULL; 2652static sema_t sig_sem; 2653typedef int (*version_getting_t)(); 2654version_getting_t os::Solaris::get_libjsig_version = NULL; 2655static int libjsigversion = NULL; 2656 2657int os::sigexitnum_pd() { 2658 assert(Sigexit > 0, "signal memory not yet initialized"); 2659 return Sigexit; 2660} 2661 2662void os::Solaris::init_signal_mem() { 2663 // Initialize signal structures 2664 Maxsignum = SIGRTMAX; 2665 Sigexit = Maxsignum+1; 2666 assert(Maxsignum >0, "Unable to obtain max signal number"); 2667 2668 Maxlibjsigsigs = Maxsignum; 2669 2670 // pending_signals has one int per signal 2671 // The additional signal is for SIGEXIT - exit signal to signal_thread 2672 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2673 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2674 2675 if (UseSignalChaining) { 2676 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2677 * (Maxsignum + 1)); 2678 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2679 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2680 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2681 } 2682 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2683 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2684} 2685 2686void os::signal_init_pd() { 2687 int ret; 2688 2689 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2690 assert(ret == 0, "sema_init() failed"); 2691} 2692 2693void os::signal_notify(int signal_number) { 2694 int ret; 2695 2696 Atomic::inc(&pending_signals[signal_number]); 2697 ret = ::sema_post(&sig_sem); 2698 assert(ret == 0, "sema_post() failed"); 2699} 2700 2701static int check_pending_signals(bool wait_for_signal) { 2702 int ret; 2703 while (true) { 2704 for (int i = 0; i < Sigexit + 1; i++) { 2705 jint n = pending_signals[i]; 2706 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2707 return i; 2708 } 2709 } 2710 if (!wait_for_signal) { 2711 return -1; 2712 } 2713 JavaThread *thread = JavaThread::current(); 2714 ThreadBlockInVM tbivm(thread); 2715 2716 bool threadIsSuspended; 2717 do { 2718 thread->set_suspend_equivalent(); 2719 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2720 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2721 ; 2722 assert(ret == 0, "sema_wait() failed"); 2723 2724 // were we externally suspended while we were waiting? 2725 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2726 if (threadIsSuspended) { 2727 // 2728 // The semaphore has been incremented, but while we were waiting 2729 // another thread suspended us. We don't want to continue running 2730 // while suspended because that would surprise the thread that 2731 // suspended us. 2732 // 2733 ret = ::sema_post(&sig_sem); 2734 assert(ret == 0, "sema_post() failed"); 2735 2736 thread->java_suspend_self(); 2737 } 2738 } while (threadIsSuspended); 2739 } 2740} 2741 2742int os::signal_lookup() { 2743 return check_pending_signals(false); 2744} 2745 2746int os::signal_wait() { 2747 return check_pending_signals(true); 2748} 2749 2750//////////////////////////////////////////////////////////////////////////////// 2751// Virtual Memory 2752 2753static int page_size = -1; 2754 2755// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2756// clear this var if support is not available. 2757static bool has_map_align = true; 2758 2759int os::vm_page_size() { 2760 assert(page_size != -1, "must call os::init"); 2761 return page_size; 2762} 2763 2764// Solaris allocates memory by pages. 2765int os::vm_allocation_granularity() { 2766 assert(page_size != -1, "must call os::init"); 2767 return page_size; 2768} 2769 2770bool os::commit_memory(char* addr, size_t bytes, bool exec) { 2771 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2772 size_t size = bytes; 2773 return 2774 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2775} 2776 2777bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2778 bool exec) { 2779 if (commit_memory(addr, bytes, exec)) { 2780 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2781 // If the large page size has been set and the VM 2782 // is using large pages, use the large page size 2783 // if it is smaller than the alignment hint. This is 2784 // a case where the VM wants to use a larger alignment size 2785 // for its own reasons but still want to use large pages 2786 // (which is what matters to setting the mpss range. 2787 size_t page_size = 0; 2788 if (large_page_size() < alignment_hint) { 2789 assert(UseLargePages, "Expected to be here for large page use only"); 2790 page_size = large_page_size(); 2791 } else { 2792 // If the alignment hint is less than the large page 2793 // size, the VM wants a particular alignment (thus the hint) 2794 // for internal reasons. Try to set the mpss range using 2795 // the alignment_hint. 2796 page_size = alignment_hint; 2797 } 2798 // Since this is a hint, ignore any failures. 2799 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2800 } 2801 return true; 2802 } 2803 return false; 2804} 2805 2806// Uncommit the pages in a specified region. 2807void os::free_memory(char* addr, size_t bytes) { 2808 if (madvise(addr, bytes, MADV_FREE) < 0) { 2809 debug_only(warning("MADV_FREE failed.")); 2810 return; 2811 } 2812} 2813 2814bool os::create_stack_guard_pages(char* addr, size_t size) { 2815 return os::commit_memory(addr, size); 2816} 2817 2818bool os::remove_stack_guard_pages(char* addr, size_t size) { 2819 return os::uncommit_memory(addr, size); 2820} 2821 2822// Change the page size in a given range. 2823void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2824 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2825 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2826 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2827} 2828 2829// Tell the OS to make the range local to the first-touching LWP 2830void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2831 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2832 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2833 debug_only(warning("MADV_ACCESS_LWP failed.")); 2834 } 2835} 2836 2837// Tell the OS that this range would be accessed from different LWPs. 2838void os::numa_make_global(char *addr, size_t bytes) { 2839 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2840 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2841 debug_only(warning("MADV_ACCESS_MANY failed.")); 2842 } 2843} 2844 2845// Get the number of the locality groups. 2846size_t os::numa_get_groups_num() { 2847 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2848 return n != -1 ? n : 1; 2849} 2850 2851// Get a list of leaf locality groups. A leaf lgroup is group that 2852// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2853// board. An LWP is assigned to one of these groups upon creation. 2854size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2855 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2856 ids[0] = 0; 2857 return 1; 2858 } 2859 int result_size = 0, top = 1, bottom = 0, cur = 0; 2860 for (int k = 0; k < size; k++) { 2861 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2862 (Solaris::lgrp_id_t*)&ids[top], size - top); 2863 if (r == -1) { 2864 ids[0] = 0; 2865 return 1; 2866 } 2867 if (!r) { 2868 // That's a leaf node. 2869 assert (bottom <= cur, "Sanity check"); 2870 // Check if the node has memory 2871 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2872 NULL, 0, LGRP_RSRC_MEM) > 0) { 2873 ids[bottom++] = ids[cur]; 2874 } 2875 } 2876 top += r; 2877 cur++; 2878 } 2879 if (bottom == 0) { 2880 // Handle a situation, when the OS reports no memory available. 2881 // Assume UMA architecture. 2882 ids[0] = 0; 2883 return 1; 2884 } 2885 return bottom; 2886} 2887 2888// Detect the topology change. Typically happens during CPU plugging-unplugging. 2889bool os::numa_topology_changed() { 2890 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2891 if (is_stale != -1 && is_stale) { 2892 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2893 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2894 assert(c != 0, "Failure to initialize LGRP API"); 2895 Solaris::set_lgrp_cookie(c); 2896 return true; 2897 } 2898 return false; 2899} 2900 2901// Get the group id of the current LWP. 2902int os::numa_get_group_id() { 2903 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2904 if (lgrp_id == -1) { 2905 return 0; 2906 } 2907 const int size = os::numa_get_groups_num(); 2908 int *ids = (int*)alloca(size * sizeof(int)); 2909 2910 // Get the ids of all lgroups with memory; r is the count. 2911 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2912 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2913 if (r <= 0) { 2914 return 0; 2915 } 2916 return ids[os::random() % r]; 2917} 2918 2919// Request information about the page. 2920bool os::get_page_info(char *start, page_info* info) { 2921 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2922 uint64_t addr = (uintptr_t)start; 2923 uint64_t outdata[2]; 2924 uint_t validity = 0; 2925 2926 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2927 return false; 2928 } 2929 2930 info->size = 0; 2931 info->lgrp_id = -1; 2932 2933 if ((validity & 1) != 0) { 2934 if ((validity & 2) != 0) { 2935 info->lgrp_id = outdata[0]; 2936 } 2937 if ((validity & 4) != 0) { 2938 info->size = outdata[1]; 2939 } 2940 return true; 2941 } 2942 return false; 2943} 2944 2945// Scan the pages from start to end until a page different than 2946// the one described in the info parameter is encountered. 2947char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2948 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2949 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2950 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2951 uint_t validity[MAX_MEMINFO_CNT]; 2952 2953 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2954 uint64_t p = (uint64_t)start; 2955 while (p < (uint64_t)end) { 2956 addrs[0] = p; 2957 size_t addrs_count = 1; 2958 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2959 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2960 addrs_count++; 2961 } 2962 2963 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2964 return NULL; 2965 } 2966 2967 size_t i = 0; 2968 for (; i < addrs_count; i++) { 2969 if ((validity[i] & 1) != 0) { 2970 if ((validity[i] & 4) != 0) { 2971 if (outdata[types * i + 1] != page_expected->size) { 2972 break; 2973 } 2974 } else 2975 if (page_expected->size != 0) { 2976 break; 2977 } 2978 2979 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2980 if (outdata[types * i] != page_expected->lgrp_id) { 2981 break; 2982 } 2983 } 2984 } else { 2985 return NULL; 2986 } 2987 } 2988 2989 if (i != addrs_count) { 2990 if ((validity[i] & 2) != 0) { 2991 page_found->lgrp_id = outdata[types * i]; 2992 } else { 2993 page_found->lgrp_id = -1; 2994 } 2995 if ((validity[i] & 4) != 0) { 2996 page_found->size = outdata[types * i + 1]; 2997 } else { 2998 page_found->size = 0; 2999 } 3000 return (char*)addrs[i]; 3001 } 3002 3003 p = addrs[addrs_count - 1] + page_size; 3004 } 3005 return end; 3006} 3007 3008bool os::uncommit_memory(char* addr, size_t bytes) { 3009 size_t size = bytes; 3010 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3011 // uncommitted page. Otherwise, the read/write might succeed if we 3012 // have enough swap space to back the physical page. 3013 return 3014 NULL != Solaris::mmap_chunk(addr, size, 3015 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3016 PROT_NONE); 3017} 3018 3019char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3020 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3021 3022 if (b == MAP_FAILED) { 3023 return NULL; 3024 } 3025 return b; 3026} 3027 3028char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3029 char* addr = requested_addr; 3030 int flags = MAP_PRIVATE | MAP_NORESERVE; 3031 3032 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3033 3034 if (fixed) { 3035 flags |= MAP_FIXED; 3036 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3037 flags |= MAP_ALIGN; 3038 addr = (char*) alignment_hint; 3039 } 3040 3041 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3042 // uncommitted page. Otherwise, the read/write might succeed if we 3043 // have enough swap space to back the physical page. 3044 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3045} 3046 3047char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3048 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3049 3050 guarantee(requested_addr == NULL || requested_addr == addr, 3051 "OS failed to return requested mmap address."); 3052 return addr; 3053} 3054 3055// Reserve memory at an arbitrary address, only if that area is 3056// available (and not reserved for something else). 3057 3058char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3059 const int max_tries = 10; 3060 char* base[max_tries]; 3061 size_t size[max_tries]; 3062 3063 // Solaris adds a gap between mmap'ed regions. The size of the gap 3064 // is dependent on the requested size and the MMU. Our initial gap 3065 // value here is just a guess and will be corrected later. 3066 bool had_top_overlap = false; 3067 bool have_adjusted_gap = false; 3068 size_t gap = 0x400000; 3069 3070 // Assert only that the size is a multiple of the page size, since 3071 // that's all that mmap requires, and since that's all we really know 3072 // about at this low abstraction level. If we need higher alignment, 3073 // we can either pass an alignment to this method or verify alignment 3074 // in one of the methods further up the call chain. See bug 5044738. 3075 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3076 3077 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3078 // Give it a try, if the kernel honors the hint we can return immediately. 3079 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3080 volatile int err = errno; 3081 if (addr == requested_addr) { 3082 return addr; 3083 } else if (addr != NULL) { 3084 unmap_memory(addr, bytes); 3085 } 3086 3087 if (PrintMiscellaneous && Verbose) { 3088 char buf[256]; 3089 buf[0] = '\0'; 3090 if (addr == NULL) { 3091 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3092 } 3093 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 3094 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3095 "%s", bytes, requested_addr, addr, buf); 3096 } 3097 3098 // Address hint method didn't work. Fall back to the old method. 3099 // In theory, once SNV becomes our oldest supported platform, this 3100 // code will no longer be needed. 3101 // 3102 // Repeatedly allocate blocks until the block is allocated at the 3103 // right spot. Give up after max_tries. 3104 int i; 3105 for (i = 0; i < max_tries; ++i) { 3106 base[i] = reserve_memory(bytes); 3107 3108 if (base[i] != NULL) { 3109 // Is this the block we wanted? 3110 if (base[i] == requested_addr) { 3111 size[i] = bytes; 3112 break; 3113 } 3114 3115 // check that the gap value is right 3116 if (had_top_overlap && !have_adjusted_gap) { 3117 size_t actual_gap = base[i-1] - base[i] - bytes; 3118 if (gap != actual_gap) { 3119 // adjust the gap value and retry the last 2 allocations 3120 assert(i > 0, "gap adjustment code problem"); 3121 have_adjusted_gap = true; // adjust the gap only once, just in case 3122 gap = actual_gap; 3123 if (PrintMiscellaneous && Verbose) { 3124 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3125 } 3126 unmap_memory(base[i], bytes); 3127 unmap_memory(base[i-1], size[i-1]); 3128 i-=2; 3129 continue; 3130 } 3131 } 3132 3133 // Does this overlap the block we wanted? Give back the overlapped 3134 // parts and try again. 3135 // 3136 // There is still a bug in this code: if top_overlap == bytes, 3137 // the overlap is offset from requested region by the value of gap. 3138 // In this case giving back the overlapped part will not work, 3139 // because we'll give back the entire block at base[i] and 3140 // therefore the subsequent allocation will not generate a new gap. 3141 // This could be fixed with a new algorithm that used larger 3142 // or variable size chunks to find the requested region - 3143 // but such a change would introduce additional complications. 3144 // It's rare enough that the planets align for this bug, 3145 // so we'll just wait for a fix for 6204603/5003415 which 3146 // will provide a mmap flag to allow us to avoid this business. 3147 3148 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3149 if (top_overlap >= 0 && top_overlap < bytes) { 3150 had_top_overlap = true; 3151 unmap_memory(base[i], top_overlap); 3152 base[i] += top_overlap; 3153 size[i] = bytes - top_overlap; 3154 } else { 3155 size_t bottom_overlap = base[i] + bytes - requested_addr; 3156 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3157 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3158 warning("attempt_reserve_memory_at: possible alignment bug"); 3159 } 3160 unmap_memory(requested_addr, bottom_overlap); 3161 size[i] = bytes - bottom_overlap; 3162 } else { 3163 size[i] = bytes; 3164 } 3165 } 3166 } 3167 } 3168 3169 // Give back the unused reserved pieces. 3170 3171 for (int j = 0; j < i; ++j) { 3172 if (base[j] != NULL) { 3173 unmap_memory(base[j], size[j]); 3174 } 3175 } 3176 3177 return (i < max_tries) ? requested_addr : NULL; 3178} 3179 3180bool os::release_memory(char* addr, size_t bytes) { 3181 size_t size = bytes; 3182 return munmap(addr, size) == 0; 3183} 3184 3185static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3186 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3187 "addr must be page aligned"); 3188 int retVal = mprotect(addr, bytes, prot); 3189 return retVal == 0; 3190} 3191 3192// Protect memory (Used to pass readonly pages through 3193// JNI GetArray<type>Elements with empty arrays.) 3194// Also, used for serialization page and for compressed oops null pointer 3195// checking. 3196bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3197 bool is_committed) { 3198 unsigned int p = 0; 3199 switch (prot) { 3200 case MEM_PROT_NONE: p = PROT_NONE; break; 3201 case MEM_PROT_READ: p = PROT_READ; break; 3202 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3203 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3204 default: 3205 ShouldNotReachHere(); 3206 } 3207 // is_committed is unused. 3208 return solaris_mprotect(addr, bytes, p); 3209} 3210 3211// guard_memory and unguard_memory only happens within stack guard pages. 3212// Since ISM pertains only to the heap, guard and unguard memory should not 3213/// happen with an ISM region. 3214bool os::guard_memory(char* addr, size_t bytes) { 3215 return solaris_mprotect(addr, bytes, PROT_NONE); 3216} 3217 3218bool os::unguard_memory(char* addr, size_t bytes) { 3219 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3220} 3221 3222// Large page support 3223 3224// UseLargePages is the master flag to enable/disable large page memory. 3225// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3226// effects can be described in the following table: 3227// 3228// UseLargePages UseMPSS UseISM 3229// false * * => UseLargePages is the master switch, turning 3230// it off will turn off both UseMPSS and 3231// UseISM. VM will not use large page memory 3232// regardless the settings of UseMPSS/UseISM. 3233// true false false => Unless future Solaris provides other 3234// mechanism to use large page memory, this 3235// combination is equivalent to -UseLargePages, 3236// VM will not use large page memory 3237// true true false => JVM will use MPSS for large page memory. 3238// This is the default behavior. 3239// true false true => JVM will use ISM for large page memory. 3240// true true true => JVM will use ISM if it is available. 3241// Otherwise, JVM will fall back to MPSS. 3242// Becaues ISM is now available on all 3243// supported Solaris versions, this combination 3244// is equivalent to +UseISM -UseMPSS. 3245 3246typedef int (*getpagesizes_func_type) (size_t[], int); 3247static size_t _large_page_size = 0; 3248 3249bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3250 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3251 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3252 // can support multiple page sizes. 3253 3254 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3255 // ISM is only recommended on old Solaris where there is no MPSS support. 3256 // Simply choose a conservative value as default. 3257 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3258 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3259 ARM_ONLY(2 * M); 3260 3261 // ISM is available on all supported Solaris versions 3262 return true; 3263} 3264 3265// Insertion sort for small arrays (descending order). 3266static void insertion_sort_descending(size_t* array, int len) { 3267 for (int i = 0; i < len; i++) { 3268 size_t val = array[i]; 3269 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3270 size_t tmp = array[key]; 3271 array[key] = array[key - 1]; 3272 array[key - 1] = tmp; 3273 } 3274 } 3275} 3276 3277bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3278 getpagesizes_func_type getpagesizes_func = 3279 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3280 if (getpagesizes_func == NULL) { 3281 if (warn) { 3282 warning("MPSS is not supported by the operating system."); 3283 } 3284 return false; 3285 } 3286 3287 const unsigned int usable_count = VM_Version::page_size_count(); 3288 if (usable_count == 1) { 3289 return false; 3290 } 3291 3292 // Fill the array of page sizes. 3293 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3294 assert(n > 0, "Solaris bug?"); 3295 if (n == page_sizes_max) { 3296 // Add a sentinel value (necessary only if the array was completely filled 3297 // since it is static (zeroed at initialization)). 3298 _page_sizes[--n] = 0; 3299 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3300 } 3301 assert(_page_sizes[n] == 0, "missing sentinel"); 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 return true; 3332} 3333 3334bool os::large_page_init() { 3335 if (!UseLargePages) { 3336 UseISM = false; 3337 UseMPSS = false; 3338 return false; 3339 } 3340 3341 // print a warning if any large page related flag is specified on command line 3342 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3343 !FLAG_IS_DEFAULT(UseISM) || 3344 !FLAG_IS_DEFAULT(UseMPSS) || 3345 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3346 UseISM = UseISM && 3347 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3348 if (UseISM) { 3349 // ISM disables MPSS to be compatible with old JDK behavior 3350 UseMPSS = false; 3351 _page_sizes[0] = _large_page_size; 3352 _page_sizes[1] = vm_page_size(); 3353 } 3354 3355 UseMPSS = UseMPSS && 3356 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3357 3358 UseLargePages = UseISM || UseMPSS; 3359 return UseLargePages; 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 bytes, 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 size_t size = bytes; 3383 char* retAddr = NULL; 3384 int shmid; 3385 key_t ismKey; 3386 3387 bool warn_on_failure = UseISM && 3388 (!FLAG_IS_DEFAULT(UseLargePages) || 3389 !FLAG_IS_DEFAULT(UseISM) || 3390 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3391 ); 3392 char msg[128]; 3393 3394 ismKey = IPC_PRIVATE; 3395 3396 // Create a large shared memory region to attach to based on size. 3397 // Currently, size is the total size of the heap 3398 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3399 if (shmid == -1){ 3400 if (warn_on_failure) { 3401 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3402 warning(msg); 3403 } 3404 return NULL; 3405 } 3406 3407 // Attach to the region 3408 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3409 int err = errno; 3410 3411 // Remove shmid. If shmat() is successful, the actual shared memory segment 3412 // will be deleted when it's detached by shmdt() or when the process 3413 // terminates. If shmat() is not successful this will remove the shared 3414 // segment immediately. 3415 shmctl(shmid, IPC_RMID, NULL); 3416 3417 if (retAddr == (char *) -1) { 3418 if (warn_on_failure) { 3419 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3420 warning(msg); 3421 } 3422 return NULL; 3423 } 3424 3425 return retAddr; 3426} 3427 3428bool os::release_memory_special(char* base, size_t bytes) { 3429 // detaching the SHM segment will also delete it, see reserve_memory_special() 3430 int rslt = shmdt(base); 3431 return rslt == 0; 3432} 3433 3434size_t os::large_page_size() { 3435 return _large_page_size; 3436} 3437 3438// MPSS allows application to commit large page memory on demand; with ISM 3439// the entire memory region must be allocated as shared memory. 3440bool os::can_commit_large_page_memory() { 3441 return UseISM ? false : true; 3442} 3443 3444bool os::can_execute_large_page_memory() { 3445 return UseISM ? false : true; 3446} 3447 3448static int os_sleep(jlong millis, bool interruptible) { 3449 const jlong limit = INT_MAX; 3450 jlong prevtime; 3451 int res; 3452 3453 while (millis > limit) { 3454 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3455 return res; 3456 millis -= limit; 3457 } 3458 3459 // Restart interrupted polls with new parameters until the proper delay 3460 // has been completed. 3461 3462 prevtime = getTimeMillis(); 3463 3464 while (millis > 0) { 3465 jlong newtime; 3466 3467 if (!interruptible) { 3468 // Following assert fails for os::yield_all: 3469 // assert(!thread->is_Java_thread(), "must not be java thread"); 3470 res = poll(NULL, 0, millis); 3471 } else { 3472 JavaThread *jt = JavaThread::current(); 3473 3474 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3475 os::Solaris::clear_interrupted); 3476 } 3477 3478 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3479 // thread.Interrupt. 3480 3481 // See c/r 6751923. Poll can return 0 before time 3482 // has elapsed if time is set via clock_settime (as NTP does). 3483 // res == 0 if poll timed out (see man poll RETURN VALUES) 3484 // using the logic below checks that we really did 3485 // sleep at least "millis" if not we'll sleep again. 3486 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3487 newtime = getTimeMillis(); 3488 assert(newtime >= prevtime, "time moving backwards"); 3489 /* Doing prevtime and newtime in microseconds doesn't help precision, 3490 and trying to round up to avoid lost milliseconds can result in a 3491 too-short delay. */ 3492 millis -= newtime - prevtime; 3493 if(millis <= 0) 3494 return OS_OK; 3495 prevtime = newtime; 3496 } else 3497 return res; 3498 } 3499 3500 return OS_OK; 3501} 3502 3503// Read calls from inside the vm need to perform state transitions 3504size_t os::read(int fd, void *buf, unsigned int nBytes) { 3505 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3506} 3507 3508size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3509 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3510} 3511 3512int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3513 assert(thread == Thread::current(), "thread consistency check"); 3514 3515 // TODO-FIXME: this should be removed. 3516 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3517 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3518 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3519 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3520 // is fooled into believing that the system is making progress. In the code below we block the 3521 // the watcher thread while safepoint is in progress so that it would not appear as though the 3522 // system is making progress. 3523 if (!Solaris::T2_libthread() && 3524 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3525 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3526 // the entire safepoint, the watcher thread will line up here during the safepoint. 3527 Threads_lock->lock_without_safepoint_check(); 3528 Threads_lock->unlock(); 3529 } 3530 3531 if (thread->is_Java_thread()) { 3532 // This is a JavaThread so we honor the _thread_blocked protocol 3533 // even for sleeps of 0 milliseconds. This was originally done 3534 // as a workaround for bug 4338139. However, now we also do it 3535 // to honor the suspend-equivalent protocol. 3536 3537 JavaThread *jt = (JavaThread *) thread; 3538 ThreadBlockInVM tbivm(jt); 3539 3540 jt->set_suspend_equivalent(); 3541 // cleared by handle_special_suspend_equivalent_condition() or 3542 // java_suspend_self() via check_and_wait_while_suspended() 3543 3544 int ret_code; 3545 if (millis <= 0) { 3546 thr_yield(); 3547 ret_code = 0; 3548 } else { 3549 // The original sleep() implementation did not create an 3550 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3551 // I'm preserving that decision for now. 3552 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3553 3554 ret_code = os_sleep(millis, interruptible); 3555 } 3556 3557 // were we externally suspended while we were waiting? 3558 jt->check_and_wait_while_suspended(); 3559 3560 return ret_code; 3561 } 3562 3563 // non-JavaThread from this point on: 3564 3565 if (millis <= 0) { 3566 thr_yield(); 3567 return 0; 3568 } 3569 3570 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3571 3572 return os_sleep(millis, interruptible); 3573} 3574 3575int os::naked_sleep() { 3576 // %% make the sleep time an integer flag. for now use 1 millisec. 3577 return os_sleep(1, false); 3578} 3579 3580// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3581void os::infinite_sleep() { 3582 while (true) { // sleep forever ... 3583 ::sleep(100); // ... 100 seconds at a time 3584 } 3585} 3586 3587// Used to convert frequent JVM_Yield() to nops 3588bool os::dont_yield() { 3589 if (DontYieldALot) { 3590 static hrtime_t last_time = 0; 3591 hrtime_t diff = getTimeNanos() - last_time; 3592 3593 if (diff < DontYieldALotInterval * 1000000) 3594 return true; 3595 3596 last_time += diff; 3597 3598 return false; 3599 } 3600 else { 3601 return false; 3602 } 3603} 3604 3605// Caveat: Solaris os::yield() causes a thread-state transition whereas 3606// the linux and win32 implementations do not. This should be checked. 3607 3608void os::yield() { 3609 // Yields to all threads with same or greater priority 3610 os::sleep(Thread::current(), 0, false); 3611} 3612 3613// Note that yield semantics are defined by the scheduling class to which 3614// the thread currently belongs. Typically, yield will _not yield to 3615// other equal or higher priority threads that reside on the dispatch queues 3616// of other CPUs. 3617 3618os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3619 3620 3621// On Solaris we found that yield_all doesn't always yield to all other threads. 3622// There have been cases where there is a thread ready to execute but it doesn't 3623// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3624// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3625// SIGWAITING signal which will cause a new lwp to be created. So we count the 3626// number of times yield_all is called in the one loop and increase the sleep 3627// time after 8 attempts. If this fails too we increase the concurrency level 3628// so that the starving thread would get an lwp 3629 3630void os::yield_all(int attempts) { 3631 // Yields to all threads, including threads with lower priorities 3632 if (attempts == 0) { 3633 os::sleep(Thread::current(), 1, false); 3634 } else { 3635 int iterations = attempts % 30; 3636 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3637 // thr_setconcurrency and _getconcurrency make sense only under T1. 3638 int noofLWPS = thr_getconcurrency(); 3639 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3640 thr_setconcurrency(thr_getconcurrency() + 1); 3641 } 3642 } else if (iterations < 25) { 3643 os::sleep(Thread::current(), 1, false); 3644 } else { 3645 os::sleep(Thread::current(), 10, false); 3646 } 3647 } 3648} 3649 3650// Called from the tight loops to possibly influence time-sharing heuristics 3651void os::loop_breaker(int attempts) { 3652 os::yield_all(attempts); 3653} 3654 3655 3656// Interface for setting lwp priorities. If we are using T2 libthread, 3657// which forces the use of BoundThreads or we manually set UseBoundThreads, 3658// all of our threads will be assigned to real lwp's. Using the thr_setprio 3659// function is meaningless in this mode so we must adjust the real lwp's priority 3660// The routines below implement the getting and setting of lwp priorities. 3661// 3662// Note: There are three priority scales used on Solaris. Java priotities 3663// which range from 1 to 10, libthread "thr_setprio" scale which range 3664// from 0 to 127, and the current scheduling class of the process we 3665// are running in. This is typically from -60 to +60. 3666// The setting of the lwp priorities in done after a call to thr_setprio 3667// so Java priorities are mapped to libthread priorities and we map from 3668// the latter to lwp priorities. We don't keep priorities stored in 3669// Java priorities since some of our worker threads want to set priorities 3670// higher than all Java threads. 3671// 3672// For related information: 3673// (1) man -s 2 priocntl 3674// (2) man -s 4 priocntl 3675// (3) man dispadmin 3676// = librt.so 3677// = libthread/common/rtsched.c - thrp_setlwpprio(). 3678// = ps -cL <pid> ... to validate priority. 3679// = sched_get_priority_min and _max 3680// pthread_create 3681// sched_setparam 3682// pthread_setschedparam 3683// 3684// Assumptions: 3685// + We assume that all threads in the process belong to the same 3686// scheduling class. IE. an homogenous process. 3687// + Must be root or in IA group to change change "interactive" attribute. 3688// Priocntl() will fail silently. The only indication of failure is when 3689// we read-back the value and notice that it hasn't changed. 3690// + Interactive threads enter the runq at the head, non-interactive at the tail. 3691// + For RT, change timeslice as well. Invariant: 3692// constant "priority integral" 3693// Konst == TimeSlice * (60-Priority) 3694// Given a priority, compute appropriate timeslice. 3695// + Higher numerical values have higher priority. 3696 3697// sched class attributes 3698typedef struct { 3699 int schedPolicy; // classID 3700 int maxPrio; 3701 int minPrio; 3702} SchedInfo; 3703 3704 3705static SchedInfo tsLimits, iaLimits, rtLimits; 3706 3707#ifdef ASSERT 3708static int ReadBackValidate = 1; 3709#endif 3710static int myClass = 0; 3711static int myMin = 0; 3712static int myMax = 0; 3713static int myCur = 0; 3714static bool priocntl_enable = false; 3715 3716 3717// Call the version of priocntl suitable for all supported versions 3718// of Solaris. We need to call through this wrapper so that we can 3719// build on Solaris 9 and run on Solaris 8, 9 and 10. 3720// 3721// This code should be removed if we ever stop supporting Solaris 8 3722// and earlier releases. 3723 3724static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3725typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3726static priocntl_type priocntl_ptr = priocntl_stub; 3727 3728// Stub to set the value of the real pointer, and then call the real 3729// function. 3730 3731static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3732 // Try Solaris 8- name only. 3733 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3734 guarantee(tmp != NULL, "priocntl function not found."); 3735 priocntl_ptr = tmp; 3736 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3737} 3738 3739 3740// lwp_priocntl_init 3741// 3742// Try to determine the priority scale for our process. 3743// 3744// Return errno or 0 if OK. 3745// 3746static 3747int lwp_priocntl_init () 3748{ 3749 int rslt; 3750 pcinfo_t ClassInfo; 3751 pcparms_t ParmInfo; 3752 int i; 3753 3754 if (!UseThreadPriorities) return 0; 3755 3756 // We are using Bound threads, we need to determine our priority ranges 3757 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3758 // If ThreadPriorityPolicy is 1, switch tables 3759 if (ThreadPriorityPolicy == 1) { 3760 for (i = 0 ; i < MaxPriority+1; i++) 3761 os::java_to_os_priority[i] = prio_policy1[i]; 3762 } 3763 } 3764 // Not using Bound Threads, set to ThreadPolicy 1 3765 else { 3766 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3767 os::java_to_os_priority[i] = prio_policy1[i]; 3768 } 3769 return 0; 3770 } 3771 3772 3773 // Get IDs for a set of well-known scheduling classes. 3774 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3775 // the system. We should have a loop that iterates over the 3776 // classID values, which are known to be "small" integers. 3777 3778 strcpy(ClassInfo.pc_clname, "TS"); 3779 ClassInfo.pc_cid = -1; 3780 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3781 if (rslt < 0) return errno; 3782 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3783 tsLimits.schedPolicy = ClassInfo.pc_cid; 3784 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3785 tsLimits.minPrio = -tsLimits.maxPrio; 3786 3787 strcpy(ClassInfo.pc_clname, "IA"); 3788 ClassInfo.pc_cid = -1; 3789 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3790 if (rslt < 0) return errno; 3791 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3792 iaLimits.schedPolicy = ClassInfo.pc_cid; 3793 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3794 iaLimits.minPrio = -iaLimits.maxPrio; 3795 3796 strcpy(ClassInfo.pc_clname, "RT"); 3797 ClassInfo.pc_cid = -1; 3798 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3799 if (rslt < 0) return errno; 3800 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3801 rtLimits.schedPolicy = ClassInfo.pc_cid; 3802 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3803 rtLimits.minPrio = 0; 3804 3805 3806 // Query our "current" scheduling class. 3807 // This will normally be IA,TS or, rarely, RT. 3808 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3809 ParmInfo.pc_cid = PC_CLNULL; 3810 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3811 if ( rslt < 0 ) return errno; 3812 myClass = ParmInfo.pc_cid; 3813 3814 // We now know our scheduling classId, get specific information 3815 // the class. 3816 ClassInfo.pc_cid = myClass; 3817 ClassInfo.pc_clname[0] = 0; 3818 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3819 if ( rslt < 0 ) return errno; 3820 3821 if (ThreadPriorityVerbose) 3822 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3823 3824 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3825 ParmInfo.pc_cid = PC_CLNULL; 3826 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3827 if (rslt < 0) return errno; 3828 3829 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3830 myMin = rtLimits.minPrio; 3831 myMax = rtLimits.maxPrio; 3832 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3833 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3834 myMin = iaLimits.minPrio; 3835 myMax = iaLimits.maxPrio; 3836 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3837 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3838 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3839 myMin = tsLimits.minPrio; 3840 myMax = tsLimits.maxPrio; 3841 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3842 } else { 3843 // No clue - punt 3844 if (ThreadPriorityVerbose) 3845 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3846 return EINVAL; // no clue, punt 3847 } 3848 3849 if (ThreadPriorityVerbose) 3850 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3851 3852 priocntl_enable = true; // Enable changing priorities 3853 return 0; 3854} 3855 3856#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3857#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3858#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3859 3860 3861// scale_to_lwp_priority 3862// 3863// Convert from the libthread "thr_setprio" scale to our current 3864// lwp scheduling class scale. 3865// 3866static 3867int scale_to_lwp_priority (int rMin, int rMax, int x) 3868{ 3869 int v; 3870 3871 if (x == 127) return rMax; // avoid round-down 3872 v = (((x*(rMax-rMin)))/128)+rMin; 3873 return v; 3874} 3875 3876 3877// set_lwp_priority 3878// 3879// Set the priority of the lwp. This call should only be made 3880// when using bound threads (T2 threads are bound by default). 3881// 3882int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3883{ 3884 int rslt; 3885 int Actual, Expected, prv; 3886 pcparms_t ParmInfo; // for GET-SET 3887#ifdef ASSERT 3888 pcparms_t ReadBack; // for readback 3889#endif 3890 3891 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3892 // Query current values. 3893 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3894 // Cache "pcparms_t" in global ParmCache. 3895 // TODO: elide set-to-same-value 3896 3897 // If something went wrong on init, don't change priorities. 3898 if ( !priocntl_enable ) { 3899 if (ThreadPriorityVerbose) 3900 tty->print_cr("Trying to set priority but init failed, ignoring"); 3901 return EINVAL; 3902 } 3903 3904 3905 // If lwp hasn't started yet, just return 3906 // the _start routine will call us again. 3907 if ( lwpid <= 0 ) { 3908 if (ThreadPriorityVerbose) { 3909 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3910 ThreadID, newPrio); 3911 } 3912 return 0; 3913 } 3914 3915 if (ThreadPriorityVerbose) { 3916 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3917 ThreadID, lwpid, newPrio); 3918 } 3919 3920 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3921 ParmInfo.pc_cid = PC_CLNULL; 3922 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3923 if (rslt < 0) return errno; 3924 3925 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3926 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3927 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3928 rtInfo->rt_tqsecs = RT_NOCHANGE; 3929 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3930 if (ThreadPriorityVerbose) { 3931 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3932 } 3933 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3934 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3935 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3936 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3937 iaInfo->ia_uprilim = IA_NOCHANGE; 3938 iaInfo->ia_mode = IA_NOCHANGE; 3939 if (ThreadPriorityVerbose) { 3940 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3941 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3942 } 3943 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3944 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3945 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3946 prv = tsInfo->ts_upri; 3947 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3948 tsInfo->ts_uprilim = IA_NOCHANGE; 3949 if (ThreadPriorityVerbose) { 3950 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3951 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3952 } 3953 if (prv == tsInfo->ts_upri) return 0; 3954 } else { 3955 if ( ThreadPriorityVerbose ) { 3956 tty->print_cr ("Unknown scheduling class\n"); 3957 } 3958 return EINVAL; // no clue, punt 3959 } 3960 3961 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3962 if (ThreadPriorityVerbose && rslt) { 3963 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3964 } 3965 if (rslt < 0) return errno; 3966 3967#ifdef ASSERT 3968 // Sanity check: read back what we just attempted to set. 3969 // In theory it could have changed in the interim ... 3970 // 3971 // The priocntl system call is tricky. 3972 // Sometimes it'll validate the priority value argument and 3973 // return EINVAL if unhappy. At other times it fails silently. 3974 // Readbacks are prudent. 3975 3976 if (!ReadBackValidate) return 0; 3977 3978 memset(&ReadBack, 0, sizeof(pcparms_t)); 3979 ReadBack.pc_cid = PC_CLNULL; 3980 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3981 assert(rslt >= 0, "priocntl failed"); 3982 Actual = Expected = 0xBAD; 3983 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3984 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3985 Actual = RTPRI(ReadBack)->rt_pri; 3986 Expected = RTPRI(ParmInfo)->rt_pri; 3987 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3988 Actual = IAPRI(ReadBack)->ia_upri; 3989 Expected = IAPRI(ParmInfo)->ia_upri; 3990 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3991 Actual = TSPRI(ReadBack)->ts_upri; 3992 Expected = TSPRI(ParmInfo)->ts_upri; 3993 } else { 3994 if ( ThreadPriorityVerbose ) { 3995 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3996 } 3997 } 3998 3999 if (Actual != Expected) { 4000 if ( ThreadPriorityVerbose ) { 4001 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4002 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4003 } 4004 } 4005#endif 4006 4007 return 0; 4008} 4009 4010 4011 4012// Solaris only gives access to 128 real priorities at a time, 4013// so we expand Java's ten to fill this range. This would be better 4014// if we dynamically adjusted relative priorities. 4015// 4016// The ThreadPriorityPolicy option allows us to select 2 different 4017// priority scales. 4018// 4019// ThreadPriorityPolicy=0 4020// Since the Solaris' default priority is MaximumPriority, we do not 4021// set a priority lower than Max unless a priority lower than 4022// NormPriority is requested. 4023// 4024// ThreadPriorityPolicy=1 4025// This mode causes the priority table to get filled with 4026// linear values. NormPriority get's mapped to 50% of the 4027// Maximum priority an so on. This will cause VM threads 4028// to get unfair treatment against other Solaris processes 4029// which do not explicitly alter their thread priorities. 4030// 4031 4032 4033int os::java_to_os_priority[MaxPriority + 1] = { 4034 -99999, // 0 Entry should never be used 4035 4036 0, // 1 MinPriority 4037 32, // 2 4038 64, // 3 4039 4040 96, // 4 4041 127, // 5 NormPriority 4042 127, // 6 4043 4044 127, // 7 4045 127, // 8 4046 127, // 9 NearMaxPriority 4047 4048 127 // 10 MaxPriority 4049}; 4050 4051 4052OSReturn os::set_native_priority(Thread* thread, int newpri) { 4053 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4054 if ( !UseThreadPriorities ) return OS_OK; 4055 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 4056 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 4057 status |= (set_lwp_priority (thread->osthread()->thread_id(), 4058 thread->osthread()->lwp_id(), newpri )); 4059 return (status == 0) ? OS_OK : OS_ERR; 4060} 4061 4062 4063OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4064 int p; 4065 if ( !UseThreadPriorities ) { 4066 *priority_ptr = NormalPriority; 4067 return OS_OK; 4068 } 4069 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4070 if (status != 0) { 4071 return OS_ERR; 4072 } 4073 *priority_ptr = p; 4074 return OS_OK; 4075} 4076 4077 4078// Hint to the underlying OS that a task switch would not be good. 4079// Void return because it's a hint and can fail. 4080void os::hint_no_preempt() { 4081 schedctl_start(schedctl_init()); 4082} 4083 4084void os::interrupt(Thread* thread) { 4085 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4086 4087 OSThread* osthread = thread->osthread(); 4088 4089 int isInterrupted = osthread->interrupted(); 4090 if (!isInterrupted) { 4091 osthread->set_interrupted(true); 4092 OrderAccess::fence(); 4093 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4094 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4095 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4096 ParkEvent * const slp = thread->_SleepEvent ; 4097 if (slp != NULL) slp->unpark() ; 4098 } 4099 4100 // For JSR166: unpark after setting status but before thr_kill -dl 4101 if (thread->is_Java_thread()) { 4102 ((JavaThread*)thread)->parker()->unpark(); 4103 } 4104 4105 // Handle interruptible wait() ... 4106 ParkEvent * const ev = thread->_ParkEvent ; 4107 if (ev != NULL) ev->unpark() ; 4108 4109 // When events are used everywhere for os::sleep, then this thr_kill 4110 // will only be needed if UseVMInterruptibleIO is true. 4111 4112 if (!isInterrupted) { 4113 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4114 assert_status(status == 0, status, "thr_kill"); 4115 4116 // Bump thread interruption counter 4117 RuntimeService::record_thread_interrupt_signaled_count(); 4118 } 4119} 4120 4121 4122bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4123 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4124 4125 OSThread* osthread = thread->osthread(); 4126 4127 bool res = osthread->interrupted(); 4128 4129 // NOTE that since there is no "lock" around these two operations, 4130 // there is the possibility that the interrupted flag will be 4131 // "false" but that the interrupt event will be set. This is 4132 // intentional. The effect of this is that Object.wait() will appear 4133 // to have a spurious wakeup, which is not harmful, and the 4134 // possibility is so rare that it is not worth the added complexity 4135 // to add yet another lock. It has also been recommended not to put 4136 // the interrupted flag into the os::Solaris::Event structure, 4137 // because it hides the issue. 4138 if (res && clear_interrupted) { 4139 osthread->set_interrupted(false); 4140 } 4141 return res; 4142} 4143 4144 4145void os::print_statistics() { 4146} 4147 4148int os::message_box(const char* title, const char* message) { 4149 int i; 4150 fdStream err(defaultStream::error_fd()); 4151 for (i = 0; i < 78; i++) err.print_raw("="); 4152 err.cr(); 4153 err.print_raw_cr(title); 4154 for (i = 0; i < 78; i++) err.print_raw("-"); 4155 err.cr(); 4156 err.print_raw_cr(message); 4157 for (i = 0; i < 78; i++) err.print_raw("="); 4158 err.cr(); 4159 4160 char buf[16]; 4161 // Prevent process from exiting upon "read error" without consuming all CPU 4162 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4163 4164 return buf[0] == 'y' || buf[0] == 'Y'; 4165} 4166 4167// A lightweight implementation that does not suspend the target thread and 4168// thus returns only a hint. Used for profiling only! 4169ExtendedPC os::get_thread_pc(Thread* thread) { 4170 // Make sure that it is called by the watcher and the Threads lock is owned. 4171 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4172 // For now, is only used to profile the VM Thread 4173 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4174 ExtendedPC epc; 4175 4176 GetThreadPC_Callback cb(ProfileVM_lock); 4177 OSThread *osthread = thread->osthread(); 4178 const int time_to_wait = 400; // 400ms wait for initial response 4179 int status = cb.interrupt(thread, time_to_wait); 4180 4181 if (cb.is_done() ) { 4182 epc = cb.addr(); 4183 } else { 4184 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4185 osthread->thread_id(), status);); 4186 // epc is already NULL 4187 } 4188 return epc; 4189} 4190 4191 4192// This does not do anything on Solaris. This is basically a hook for being 4193// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4194void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4195 f(value, method, args, thread); 4196} 4197 4198// This routine may be used by user applications as a "hook" to catch signals. 4199// The user-defined signal handler must pass unrecognized signals to this 4200// routine, and if it returns true (non-zero), then the signal handler must 4201// return immediately. If the flag "abort_if_unrecognized" is true, then this 4202// routine will never retun false (zero), but instead will execute a VM panic 4203// routine kill the process. 4204// 4205// If this routine returns false, it is OK to call it again. This allows 4206// the user-defined signal handler to perform checks either before or after 4207// the VM performs its own checks. Naturally, the user code would be making 4208// a serious error if it tried to handle an exception (such as a null check 4209// or breakpoint) that the VM was generating for its own correct operation. 4210// 4211// This routine may recognize any of the following kinds of signals: 4212// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4213// os::Solaris::SIGasync 4214// It should be consulted by handlers for any of those signals. 4215// It explicitly does not recognize os::Solaris::SIGinterrupt 4216// 4217// The caller of this routine must pass in the three arguments supplied 4218// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4219// field of the structure passed to sigaction(). This routine assumes that 4220// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4221// 4222// Note that the VM will print warnings if it detects conflicting signal 4223// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4224// 4225extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4226 4227 4228void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4229 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4230} 4231 4232/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4233 is needed to provoke threads blocked on IO to return an EINTR 4234 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4235 does NOT participate in signal chaining due to requirement for 4236 NOT setting SA_RESTART to make EINTR work. */ 4237extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4238 if (UseSignalChaining) { 4239 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4240 if (actp && actp->sa_handler) { 4241 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4242 } 4243 } 4244} 4245 4246// This boolean allows users to forward their own non-matching signals 4247// to JVM_handle_solaris_signal, harmlessly. 4248bool os::Solaris::signal_handlers_are_installed = false; 4249 4250// For signal-chaining 4251bool os::Solaris::libjsig_is_loaded = false; 4252typedef struct sigaction *(*get_signal_t)(int); 4253get_signal_t os::Solaris::get_signal_action = NULL; 4254 4255struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4256 struct sigaction *actp = NULL; 4257 4258 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4259 // Retrieve the old signal handler from libjsig 4260 actp = (*get_signal_action)(sig); 4261 } 4262 if (actp == NULL) { 4263 // Retrieve the preinstalled signal handler from jvm 4264 actp = get_preinstalled_handler(sig); 4265 } 4266 4267 return actp; 4268} 4269 4270static bool call_chained_handler(struct sigaction *actp, int sig, 4271 siginfo_t *siginfo, void *context) { 4272 // Call the old signal handler 4273 if (actp->sa_handler == SIG_DFL) { 4274 // It's more reasonable to let jvm treat it as an unexpected exception 4275 // instead of taking the default action. 4276 return false; 4277 } else if (actp->sa_handler != SIG_IGN) { 4278 if ((actp->sa_flags & SA_NODEFER) == 0) { 4279 // automaticlly block the signal 4280 sigaddset(&(actp->sa_mask), sig); 4281 } 4282 4283 sa_handler_t hand; 4284 sa_sigaction_t sa; 4285 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4286 // retrieve the chained handler 4287 if (siginfo_flag_set) { 4288 sa = actp->sa_sigaction; 4289 } else { 4290 hand = actp->sa_handler; 4291 } 4292 4293 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4294 actp->sa_handler = SIG_DFL; 4295 } 4296 4297 // try to honor the signal mask 4298 sigset_t oset; 4299 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4300 4301 // call into the chained handler 4302 if (siginfo_flag_set) { 4303 (*sa)(sig, siginfo, context); 4304 } else { 4305 (*hand)(sig); 4306 } 4307 4308 // restore the signal mask 4309 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4310 } 4311 // Tell jvm's signal handler the signal is taken care of. 4312 return true; 4313} 4314 4315bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4316 bool chained = false; 4317 // signal-chaining 4318 if (UseSignalChaining) { 4319 struct sigaction *actp = get_chained_signal_action(sig); 4320 if (actp != NULL) { 4321 chained = call_chained_handler(actp, sig, siginfo, context); 4322 } 4323 } 4324 return chained; 4325} 4326 4327struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4328 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4329 if (preinstalled_sigs[sig] != 0) { 4330 return &chainedsigactions[sig]; 4331 } 4332 return NULL; 4333} 4334 4335void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4336 4337 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4338 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4339 chainedsigactions[sig] = oldAct; 4340 preinstalled_sigs[sig] = 1; 4341} 4342 4343void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4344 // Check for overwrite. 4345 struct sigaction oldAct; 4346 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4347 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4348 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4349 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4350 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4351 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4352 if (AllowUserSignalHandlers || !set_installed) { 4353 // Do not overwrite; user takes responsibility to forward to us. 4354 return; 4355 } else if (UseSignalChaining) { 4356 if (oktochain) { 4357 // save the old handler in jvm 4358 save_preinstalled_handler(sig, oldAct); 4359 } else { 4360 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4361 } 4362 // libjsig also interposes the sigaction() call below and saves the 4363 // old sigaction on it own. 4364 } else { 4365 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4366 "%#lx for signal %d.", (long)oldhand, sig)); 4367 } 4368 } 4369 4370 struct sigaction sigAct; 4371 sigfillset(&(sigAct.sa_mask)); 4372 sigAct.sa_handler = SIG_DFL; 4373 4374 sigAct.sa_sigaction = signalHandler; 4375 // Handle SIGSEGV on alternate signal stack if 4376 // not using stack banging 4377 if (!UseStackBanging && sig == SIGSEGV) { 4378 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4379 // Interruptible i/o requires SA_RESTART cleared so EINTR 4380 // is returned instead of restarting system calls 4381 } else if (sig == os::Solaris::SIGinterrupt()) { 4382 sigemptyset(&sigAct.sa_mask); 4383 sigAct.sa_handler = NULL; 4384 sigAct.sa_flags = SA_SIGINFO; 4385 sigAct.sa_sigaction = sigINTRHandler; 4386 } else { 4387 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4388 } 4389 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4390 4391 sigaction(sig, &sigAct, &oldAct); 4392 4393 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4394 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4395 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4396} 4397 4398 4399#define DO_SIGNAL_CHECK(sig) \ 4400 if (!sigismember(&check_signal_done, sig)) \ 4401 os::Solaris::check_signal_handler(sig) 4402 4403// This method is a periodic task to check for misbehaving JNI applications 4404// under CheckJNI, we can add any periodic checks here 4405 4406void os::run_periodic_checks() { 4407 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4408 // thereby preventing a NULL checks. 4409 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4410 4411 if (check_signals == false) return; 4412 4413 // SEGV and BUS if overridden could potentially prevent 4414 // generation of hs*.log in the event of a crash, debugging 4415 // such a case can be very challenging, so we absolutely 4416 // check for the following for a good measure: 4417 DO_SIGNAL_CHECK(SIGSEGV); 4418 DO_SIGNAL_CHECK(SIGILL); 4419 DO_SIGNAL_CHECK(SIGFPE); 4420 DO_SIGNAL_CHECK(SIGBUS); 4421 DO_SIGNAL_CHECK(SIGPIPE); 4422 DO_SIGNAL_CHECK(SIGXFSZ); 4423 4424 // ReduceSignalUsage allows the user to override these handlers 4425 // see comments at the very top and jvm_solaris.h 4426 if (!ReduceSignalUsage) { 4427 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4428 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4429 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4430 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4431 } 4432 4433 // See comments above for using JVM1/JVM2 and UseAltSigs 4434 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4435 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4436 4437} 4438 4439typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4440 4441static os_sigaction_t os_sigaction = NULL; 4442 4443void os::Solaris::check_signal_handler(int sig) { 4444 char buf[O_BUFLEN]; 4445 address jvmHandler = NULL; 4446 4447 struct sigaction act; 4448 if (os_sigaction == NULL) { 4449 // only trust the default sigaction, in case it has been interposed 4450 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4451 if (os_sigaction == NULL) return; 4452 } 4453 4454 os_sigaction(sig, (struct sigaction*)NULL, &act); 4455 4456 address thisHandler = (act.sa_flags & SA_SIGINFO) 4457 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4458 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4459 4460 4461 switch(sig) { 4462 case SIGSEGV: 4463 case SIGBUS: 4464 case SIGFPE: 4465 case SIGPIPE: 4466 case SIGXFSZ: 4467 case SIGILL: 4468 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4469 break; 4470 4471 case SHUTDOWN1_SIGNAL: 4472 case SHUTDOWN2_SIGNAL: 4473 case SHUTDOWN3_SIGNAL: 4474 case BREAK_SIGNAL: 4475 jvmHandler = (address)user_handler(); 4476 break; 4477 4478 default: 4479 int intrsig = os::Solaris::SIGinterrupt(); 4480 int asynsig = os::Solaris::SIGasync(); 4481 4482 if (sig == intrsig) { 4483 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4484 } else if (sig == asynsig) { 4485 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4486 } else { 4487 return; 4488 } 4489 break; 4490 } 4491 4492 4493 if (thisHandler != jvmHandler) { 4494 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4495 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4496 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4497 // No need to check this sig any longer 4498 sigaddset(&check_signal_done, sig); 4499 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4500 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4501 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4502 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4503 // No need to check this sig any longer 4504 sigaddset(&check_signal_done, sig); 4505 } 4506 4507 // Print all the signal handler state 4508 if (sigismember(&check_signal_done, sig)) { 4509 print_signal_handlers(tty, buf, O_BUFLEN); 4510 } 4511 4512} 4513 4514void os::Solaris::install_signal_handlers() { 4515 bool libjsigdone = false; 4516 signal_handlers_are_installed = true; 4517 4518 // signal-chaining 4519 typedef void (*signal_setting_t)(); 4520 signal_setting_t begin_signal_setting = NULL; 4521 signal_setting_t end_signal_setting = NULL; 4522 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4523 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4524 if (begin_signal_setting != NULL) { 4525 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4526 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4527 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4528 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4529 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4530 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4531 libjsig_is_loaded = true; 4532 if (os::Solaris::get_libjsig_version != NULL) { 4533 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4534 } 4535 assert(UseSignalChaining, "should enable signal-chaining"); 4536 } 4537 if (libjsig_is_loaded) { 4538 // Tell libjsig jvm is setting signal handlers 4539 (*begin_signal_setting)(); 4540 } 4541 4542 set_signal_handler(SIGSEGV, true, true); 4543 set_signal_handler(SIGPIPE, true, true); 4544 set_signal_handler(SIGXFSZ, true, true); 4545 set_signal_handler(SIGBUS, true, true); 4546 set_signal_handler(SIGILL, true, true); 4547 set_signal_handler(SIGFPE, true, true); 4548 4549 4550 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4551 4552 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4553 // can not register overridable signals which might be > 32 4554 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4555 // Tell libjsig jvm has finished setting signal handlers 4556 (*end_signal_setting)(); 4557 libjsigdone = true; 4558 } 4559 } 4560 4561 // Never ok to chain our SIGinterrupt 4562 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4563 set_signal_handler(os::Solaris::SIGasync(), true, true); 4564 4565 if (libjsig_is_loaded && !libjsigdone) { 4566 // Tell libjsig jvm finishes setting signal handlers 4567 (*end_signal_setting)(); 4568 } 4569 4570 // We don't activate signal checker if libjsig is in place, we trust ourselves 4571 // and if UserSignalHandler is installed all bets are off 4572 if (CheckJNICalls) { 4573 if (libjsig_is_loaded) { 4574 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4575 check_signals = false; 4576 } 4577 if (AllowUserSignalHandlers) { 4578 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4579 check_signals = false; 4580 } 4581 } 4582} 4583 4584 4585void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4586 4587const char * signames[] = { 4588 "SIG0", 4589 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4590 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4591 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4592 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4593 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4594 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4595 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4596 "SIGCANCEL", "SIGLOST" 4597}; 4598 4599const char* os::exception_name(int exception_code, char* buf, size_t size) { 4600 if (0 < exception_code && exception_code <= SIGRTMAX) { 4601 // signal 4602 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4603 jio_snprintf(buf, size, "%s", signames[exception_code]); 4604 } else { 4605 jio_snprintf(buf, size, "SIG%d", exception_code); 4606 } 4607 return buf; 4608 } else { 4609 return NULL; 4610 } 4611} 4612 4613// (Static) wrappers for the new libthread API 4614int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4615int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4616int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4617int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4618int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4619 4620// (Static) wrapper for getisax(2) call. 4621os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4622 4623// (Static) wrappers for the liblgrp API 4624os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4625os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4626os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4627os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4628os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4629os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4630os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4631os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4632os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4633 4634// (Static) wrapper for meminfo() call. 4635os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4636 4637static address resolve_symbol_lazy(const char* name) { 4638 address addr = (address) dlsym(RTLD_DEFAULT, name); 4639 if(addr == NULL) { 4640 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4641 addr = (address) dlsym(RTLD_NEXT, name); 4642 } 4643 return addr; 4644} 4645 4646static address resolve_symbol(const char* name) { 4647 address addr = resolve_symbol_lazy(name); 4648 if(addr == NULL) { 4649 fatal(dlerror()); 4650 } 4651 return addr; 4652} 4653 4654 4655 4656// isT2_libthread() 4657// 4658// Routine to determine if we are currently using the new T2 libthread. 4659// 4660// We determine if we are using T2 by reading /proc/self/lstatus and 4661// looking for a thread with the ASLWP bit set. If we find this status 4662// bit set, we must assume that we are NOT using T2. The T2 team 4663// has approved this algorithm. 4664// 4665// We need to determine if we are running with the new T2 libthread 4666// since setting native thread priorities is handled differently 4667// when using this library. All threads created using T2 are bound 4668// threads. Calling thr_setprio is meaningless in this case. 4669// 4670bool isT2_libthread() { 4671 static prheader_t * lwpArray = NULL; 4672 static int lwpSize = 0; 4673 static int lwpFile = -1; 4674 lwpstatus_t * that; 4675 char lwpName [128]; 4676 bool isT2 = false; 4677 4678#define ADR(x) ((uintptr_t)(x)) 4679#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4680 4681 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4682 if (lwpFile < 0) { 4683 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4684 return false; 4685 } 4686 lwpSize = 16*1024; 4687 for (;;) { 4688 ::lseek64 (lwpFile, 0, SEEK_SET); 4689 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4690 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4691 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4692 break; 4693 } 4694 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4695 // We got a good snapshot - now iterate over the list. 4696 int aslwpcount = 0; 4697 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4698 that = LWPINDEX(lwpArray,i); 4699 if (that->pr_flags & PR_ASLWP) { 4700 aslwpcount++; 4701 } 4702 } 4703 if (aslwpcount == 0) isT2 = true; 4704 break; 4705 } 4706 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4707 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4708 } 4709 4710 FREE_C_HEAP_ARRAY(char, lwpArray); 4711 ::close (lwpFile); 4712 if (ThreadPriorityVerbose) { 4713 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4714 else tty->print_cr("We are not running with a T2 libthread\n"); 4715 } 4716 return isT2; 4717} 4718 4719 4720void os::Solaris::libthread_init() { 4721 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4722 4723 // Determine if we are running with the new T2 libthread 4724 os::Solaris::set_T2_libthread(isT2_libthread()); 4725 4726 lwp_priocntl_init(); 4727 4728 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4729 if(func == NULL) { 4730 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4731 // Guarantee that this VM is running on an new enough OS (5.6 or 4732 // later) that it will have a new enough libthread.so. 4733 guarantee(func != NULL, "libthread.so is too old."); 4734 } 4735 4736 // Initialize the new libthread getstate API wrappers 4737 func = resolve_symbol("thr_getstate"); 4738 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4739 4740 func = resolve_symbol("thr_setstate"); 4741 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4742 4743 func = resolve_symbol("thr_setmutator"); 4744 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4745 4746 func = resolve_symbol("thr_suspend_mutator"); 4747 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4748 4749 func = resolve_symbol("thr_continue_mutator"); 4750 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4751 4752 int size; 4753 void (*handler_info_func)(address *, int *); 4754 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4755 handler_info_func(&handler_start, &size); 4756 handler_end = handler_start + size; 4757} 4758 4759 4760int_fnP_mutex_tP os::Solaris::_mutex_lock; 4761int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4762int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4763int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4764int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4765int os::Solaris::_mutex_scope = USYNC_THREAD; 4766 4767int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4768int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4769int_fnP_cond_tP os::Solaris::_cond_signal; 4770int_fnP_cond_tP os::Solaris::_cond_broadcast; 4771int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4772int_fnP_cond_tP os::Solaris::_cond_destroy; 4773int os::Solaris::_cond_scope = USYNC_THREAD; 4774 4775void os::Solaris::synchronization_init() { 4776 if(UseLWPSynchronization) { 4777 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4778 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4779 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4780 os::Solaris::set_mutex_init(lwp_mutex_init); 4781 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4782 os::Solaris::set_mutex_scope(USYNC_THREAD); 4783 4784 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4785 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4786 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4787 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4788 os::Solaris::set_cond_init(lwp_cond_init); 4789 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4790 os::Solaris::set_cond_scope(USYNC_THREAD); 4791 } 4792 else { 4793 os::Solaris::set_mutex_scope(USYNC_THREAD); 4794 os::Solaris::set_cond_scope(USYNC_THREAD); 4795 4796 if(UsePthreads) { 4797 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4798 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4799 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4800 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4801 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4802 4803 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4804 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4805 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4806 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4807 os::Solaris::set_cond_init(pthread_cond_default_init); 4808 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4809 } 4810 else { 4811 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4812 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4813 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4814 os::Solaris::set_mutex_init(::mutex_init); 4815 os::Solaris::set_mutex_destroy(::mutex_destroy); 4816 4817 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4818 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4819 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4820 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4821 os::Solaris::set_cond_init(::cond_init); 4822 os::Solaris::set_cond_destroy(::cond_destroy); 4823 } 4824 } 4825} 4826 4827bool os::Solaris::liblgrp_init() { 4828 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4829 if (handle != NULL) { 4830 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4831 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4832 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4833 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4834 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4835 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4836 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4837 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4838 dlsym(handle, "lgrp_cookie_stale"))); 4839 4840 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4841 set_lgrp_cookie(c); 4842 return true; 4843 } 4844 return false; 4845} 4846 4847void os::Solaris::misc_sym_init() { 4848 address func; 4849 4850 // getisax 4851 func = resolve_symbol_lazy("getisax"); 4852 if (func != NULL) { 4853 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4854 } 4855 4856 // meminfo 4857 func = resolve_symbol_lazy("meminfo"); 4858 if (func != NULL) { 4859 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4860 } 4861} 4862 4863uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4864 assert(_getisax != NULL, "_getisax not set"); 4865 return _getisax(array, n); 4866} 4867 4868// Symbol doesn't exist in Solaris 8 pset.h 4869#ifndef PS_MYID 4870#define PS_MYID -3 4871#endif 4872 4873// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4874typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4875static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4876 4877void init_pset_getloadavg_ptr(void) { 4878 pset_getloadavg_ptr = 4879 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4880 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4881 warning("pset_getloadavg function not found"); 4882 } 4883} 4884 4885int os::Solaris::_dev_zero_fd = -1; 4886 4887// this is called _before_ the global arguments have been parsed 4888void os::init(void) { 4889 _initial_pid = getpid(); 4890 4891 max_hrtime = first_hrtime = gethrtime(); 4892 4893 init_random(1234567); 4894 4895 page_size = sysconf(_SC_PAGESIZE); 4896 if (page_size == -1) 4897 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4898 strerror(errno))); 4899 init_page_sizes((size_t) page_size); 4900 4901 Solaris::initialize_system_info(); 4902 4903 // Initialize misc. symbols as soon as possible, so we can use them 4904 // if we need them. 4905 Solaris::misc_sym_init(); 4906 4907 int fd = ::open("/dev/zero", O_RDWR); 4908 if (fd < 0) { 4909 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4910 } else { 4911 Solaris::set_dev_zero_fd(fd); 4912 4913 // Close on exec, child won't inherit. 4914 fcntl(fd, F_SETFD, FD_CLOEXEC); 4915 } 4916 4917 clock_tics_per_sec = CLK_TCK; 4918 4919 // check if dladdr1() exists; dladdr1 can provide more information than 4920 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4921 // and is available on linker patches for 5.7 and 5.8. 4922 // libdl.so must have been loaded, this call is just an entry lookup 4923 void * hdl = dlopen("libdl.so", RTLD_NOW); 4924 if (hdl) 4925 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4926 4927 // (Solaris only) this switches to calls that actually do locking. 4928 ThreadCritical::initialize(); 4929 4930 main_thread = thr_self(); 4931 4932 // Constant minimum stack size allowed. It must be at least 4933 // the minimum of what the OS supports (thr_min_stack()), and 4934 // enough to allow the thread to get to user bytecode execution. 4935 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4936 // If the pagesize of the VM is greater than 8K determine the appropriate 4937 // number of initial guard pages. The user can change this with the 4938 // command line arguments, if needed. 4939 if (vm_page_size() > 8*K) { 4940 StackYellowPages = 1; 4941 StackRedPages = 1; 4942 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4943 } 4944} 4945 4946// To install functions for atexit system call 4947extern "C" { 4948 static void perfMemory_exit_helper() { 4949 perfMemory_exit(); 4950 } 4951} 4952 4953// this is called _after_ the global arguments have been parsed 4954jint os::init_2(void) { 4955 // try to enable extended file IO ASAP, see 6431278 4956 os::Solaris::try_enable_extended_io(); 4957 4958 // Allocate a single page and mark it as readable for safepoint polling. Also 4959 // use this first mmap call to check support for MAP_ALIGN. 4960 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4961 page_size, 4962 MAP_PRIVATE | MAP_ALIGN, 4963 PROT_READ); 4964 if (polling_page == NULL) { 4965 has_map_align = false; 4966 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4967 PROT_READ); 4968 } 4969 4970 os::set_polling_page(polling_page); 4971 4972#ifndef PRODUCT 4973 if( Verbose && PrintMiscellaneous ) 4974 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4975#endif 4976 4977 if (!UseMembar) { 4978 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4979 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4980 os::set_memory_serialize_page( mem_serialize_page ); 4981 4982#ifndef PRODUCT 4983 if(Verbose && PrintMiscellaneous) 4984 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4985#endif 4986} 4987 4988 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4989 4990 // Check minimum allowable stack size for thread creation and to initialize 4991 // the java system classes, including StackOverflowError - depends on page 4992 // size. Add a page for compiler2 recursion in main thread. 4993 // Add in 2*BytesPerWord times page size to account for VM stack during 4994 // class initialization depending on 32 or 64 bit VM. 4995 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4996 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4997 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4998 4999 size_t threadStackSizeInBytes = ThreadStackSize * K; 5000 if (threadStackSizeInBytes != 0 && 5001 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5002 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5003 os::Solaris::min_stack_allowed/K); 5004 return JNI_ERR; 5005 } 5006 5007 // For 64kbps there will be a 64kb page size, which makes 5008 // the usable default stack size quite a bit less. Increase the 5009 // stack for 64kb (or any > than 8kb) pages, this increases 5010 // virtual memory fragmentation (since we're not creating the 5011 // stack on a power of 2 boundary. The real fix for this 5012 // should be to fix the guard page mechanism. 5013 5014 if (vm_page_size() > 8*K) { 5015 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5016 ? threadStackSizeInBytes + 5017 ((StackYellowPages + StackRedPages) * vm_page_size()) 5018 : 0; 5019 ThreadStackSize = threadStackSizeInBytes/K; 5020 } 5021 5022 // Make the stack size a multiple of the page size so that 5023 // the yellow/red zones can be guarded. 5024 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5025 vm_page_size())); 5026 5027 Solaris::libthread_init(); 5028 5029 if (UseNUMA) { 5030 if (!Solaris::liblgrp_init()) { 5031 UseNUMA = false; 5032 } else { 5033 size_t lgrp_limit = os::numa_get_groups_num(); 5034 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); 5035 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5036 FREE_C_HEAP_ARRAY(int, lgrp_ids); 5037 if (lgrp_num < 2) { 5038 // There's only one locality group, disable NUMA. 5039 UseNUMA = false; 5040 } 5041 } 5042 if (!UseNUMA && ForceNUMA) { 5043 UseNUMA = true; 5044 } 5045 } 5046 5047 Solaris::signal_sets_init(); 5048 Solaris::init_signal_mem(); 5049 Solaris::install_signal_handlers(); 5050 5051 if (libjsigversion < JSIG_VERSION_1_4_1) { 5052 Maxlibjsigsigs = OLDMAXSIGNUM; 5053 } 5054 5055 // initialize synchronization primitives to use either thread or 5056 // lwp synchronization (controlled by UseLWPSynchronization) 5057 Solaris::synchronization_init(); 5058 5059 if (MaxFDLimit) { 5060 // set the number of file descriptors to max. print out error 5061 // if getrlimit/setrlimit fails but continue regardless. 5062 struct rlimit nbr_files; 5063 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5064 if (status != 0) { 5065 if (PrintMiscellaneous && (Verbose || WizardMode)) 5066 perror("os::init_2 getrlimit failed"); 5067 } else { 5068 nbr_files.rlim_cur = nbr_files.rlim_max; 5069 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5070 if (status != 0) { 5071 if (PrintMiscellaneous && (Verbose || WizardMode)) 5072 perror("os::init_2 setrlimit failed"); 5073 } 5074 } 5075 } 5076 5077 // Calculate theoretical max. size of Threads to guard gainst 5078 // artifical out-of-memory situations, where all available address- 5079 // space has been reserved by thread stacks. Default stack size is 1Mb. 5080 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5081 JavaThread::stack_size_at_create() : (1*K*K); 5082 assert(pre_thread_stack_size != 0, "Must have a stack"); 5083 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5084 // we should start doing Virtual Memory banging. Currently when the threads will 5085 // have used all but 200Mb of space. 5086 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5087 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5088 5089 // at-exit methods are called in the reverse order of their registration. 5090 // In Solaris 7 and earlier, atexit functions are called on return from 5091 // main or as a result of a call to exit(3C). There can be only 32 of 5092 // these functions registered and atexit() does not set errno. In Solaris 5093 // 8 and later, there is no limit to the number of functions registered 5094 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5095 // functions are called upon dlclose(3DL) in addition to return from main 5096 // and exit(3C). 5097 5098 if (PerfAllowAtExitRegistration) { 5099 // only register atexit functions if PerfAllowAtExitRegistration is set. 5100 // atexit functions can be delayed until process exit time, which 5101 // can be problematic for embedded VM situations. Embedded VMs should 5102 // call DestroyJavaVM() to assure that VM resources are released. 5103 5104 // note: perfMemory_exit_helper atexit function may be removed in 5105 // the future if the appropriate cleanup code can be added to the 5106 // VM_Exit VMOperation's doit method. 5107 if (atexit(perfMemory_exit_helper) != 0) { 5108 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5109 } 5110 } 5111 5112 // Init pset_loadavg function pointer 5113 init_pset_getloadavg_ptr(); 5114 5115 return JNI_OK; 5116} 5117 5118void os::init_3(void) { 5119 return; 5120} 5121 5122// Mark the polling page as unreadable 5123void os::make_polling_page_unreadable(void) { 5124 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5125 fatal("Could not disable polling page"); 5126}; 5127 5128// Mark the polling page as readable 5129void os::make_polling_page_readable(void) { 5130 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5131 fatal("Could not enable polling page"); 5132}; 5133 5134// OS interface. 5135 5136bool os::check_heap(bool force) { return true; } 5137 5138typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5139static vsnprintf_t sol_vsnprintf = NULL; 5140 5141int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5142 if (!sol_vsnprintf) { 5143 //search for the named symbol in the objects that were loaded after libjvm 5144 void* where = RTLD_NEXT; 5145 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5146 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5147 if (!sol_vsnprintf){ 5148 //search for the named symbol in the objects that were loaded before libjvm 5149 where = RTLD_DEFAULT; 5150 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5151 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5152 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5153 } 5154 } 5155 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5156} 5157 5158 5159// Is a (classpath) directory empty? 5160bool os::dir_is_empty(const char* path) { 5161 DIR *dir = NULL; 5162 struct dirent *ptr; 5163 5164 dir = opendir(path); 5165 if (dir == NULL) return true; 5166 5167 /* Scan the directory */ 5168 bool result = true; 5169 char buf[sizeof(struct dirent) + MAX_PATH]; 5170 struct dirent *dbuf = (struct dirent *) buf; 5171 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5172 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5173 result = false; 5174 } 5175 } 5176 closedir(dir); 5177 return result; 5178} 5179 5180// This code originates from JDK's sysOpen and open64_w 5181// from src/solaris/hpi/src/system_md.c 5182 5183#ifndef O_DELETE 5184#define O_DELETE 0x10000 5185#endif 5186 5187// Open a file. Unlink the file immediately after open returns 5188// if the specified oflag has the O_DELETE flag set. 5189// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5190 5191int os::open(const char *path, int oflag, int mode) { 5192 if (strlen(path) > MAX_PATH - 1) { 5193 errno = ENAMETOOLONG; 5194 return -1; 5195 } 5196 int fd; 5197 int o_delete = (oflag & O_DELETE); 5198 oflag = oflag & ~O_DELETE; 5199 5200 fd = ::open64(path, oflag, mode); 5201 if (fd == -1) return -1; 5202 5203 //If the open succeeded, the file might still be a directory 5204 { 5205 struct stat64 buf64; 5206 int ret = ::fstat64(fd, &buf64); 5207 int st_mode = buf64.st_mode; 5208 5209 if (ret != -1) { 5210 if ((st_mode & S_IFMT) == S_IFDIR) { 5211 errno = EISDIR; 5212 ::close(fd); 5213 return -1; 5214 } 5215 } else { 5216 ::close(fd); 5217 return -1; 5218 } 5219 } 5220 /* 5221 * 32-bit Solaris systems suffer from: 5222 * 5223 * - an historical default soft limit of 256 per-process file 5224 * descriptors that is too low for many Java programs. 5225 * 5226 * - a design flaw where file descriptors created using stdio 5227 * fopen must be less than 256, _even_ when the first limit above 5228 * has been raised. This can cause calls to fopen (but not calls to 5229 * open, for example) to fail mysteriously, perhaps in 3rd party 5230 * native code (although the JDK itself uses fopen). One can hardly 5231 * criticize them for using this most standard of all functions. 5232 * 5233 * We attempt to make everything work anyways by: 5234 * 5235 * - raising the soft limit on per-process file descriptors beyond 5236 * 256 5237 * 5238 * - As of Solaris 10u4, we can request that Solaris raise the 256 5239 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5240 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5241 * 5242 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5243 * workaround the bug by remapping non-stdio file descriptors below 5244 * 256 to ones beyond 256, which is done below. 5245 * 5246 * See: 5247 * 1085341: 32-bit stdio routines should support file descriptors >255 5248 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5249 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5250 * enable_extended_FILE_stdio() in VM initialisation 5251 * Giri Mandalika's blog 5252 * http://technopark02.blogspot.com/2005_05_01_archive.html 5253 */ 5254#ifndef _LP64 5255 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5256 int newfd = ::fcntl(fd, F_DUPFD, 256); 5257 if (newfd != -1) { 5258 ::close(fd); 5259 fd = newfd; 5260 } 5261 } 5262#endif // 32-bit Solaris 5263 /* 5264 * All file descriptors that are opened in the JVM and not 5265 * specifically destined for a subprocess should have the 5266 * close-on-exec flag set. If we don't set it, then careless 3rd 5267 * party native code might fork and exec without closing all 5268 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5269 * UNIXProcess.c), and this in turn might: 5270 * 5271 * - cause end-of-file to fail to be detected on some file 5272 * descriptors, resulting in mysterious hangs, or 5273 * 5274 * - might cause an fopen in the subprocess to fail on a system 5275 * suffering from bug 1085341. 5276 * 5277 * (Yes, the default setting of the close-on-exec flag is a Unix 5278 * design flaw) 5279 * 5280 * See: 5281 * 1085341: 32-bit stdio routines should support file descriptors >255 5282 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5283 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5284 */ 5285#ifdef FD_CLOEXEC 5286 { 5287 int flags = ::fcntl(fd, F_GETFD); 5288 if (flags != -1) 5289 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5290 } 5291#endif 5292 5293 if (o_delete != 0) { 5294 ::unlink(path); 5295 } 5296 return fd; 5297} 5298 5299// create binary file, rewriting existing file if required 5300int os::create_binary_file(const char* path, bool rewrite_existing) { 5301 int oflags = O_WRONLY | O_CREAT; 5302 if (!rewrite_existing) { 5303 oflags |= O_EXCL; 5304 } 5305 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5306} 5307 5308// return current position of file pointer 5309jlong os::current_file_offset(int fd) { 5310 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5311} 5312 5313// move file pointer to the specified offset 5314jlong os::seek_to_file_offset(int fd, jlong offset) { 5315 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5316} 5317 5318jlong os::lseek(int fd, jlong offset, int whence) { 5319 return (jlong) ::lseek64(fd, offset, whence); 5320} 5321 5322char * os::native_path(char *path) { 5323 return path; 5324} 5325 5326int os::ftruncate(int fd, jlong length) { 5327 return ::ftruncate64(fd, length); 5328} 5329 5330int os::fsync(int fd) { 5331 RESTARTABLE_RETURN_INT(::fsync(fd)); 5332} 5333 5334int os::available(int fd, jlong *bytes) { 5335 jlong cur, end; 5336 int mode; 5337 struct stat64 buf64; 5338 5339 if (::fstat64(fd, &buf64) >= 0) { 5340 mode = buf64.st_mode; 5341 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5342 /* 5343 * XXX: is the following call interruptible? If so, this might 5344 * need to go through the INTERRUPT_IO() wrapper as for other 5345 * blocking, interruptible calls in this file. 5346 */ 5347 int n,ioctl_return; 5348 5349 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5350 if (ioctl_return>= 0) { 5351 *bytes = n; 5352 return 1; 5353 } 5354 } 5355 } 5356 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5357 return 0; 5358 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5359 return 0; 5360 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5361 return 0; 5362 } 5363 *bytes = end - cur; 5364 return 1; 5365} 5366 5367// Map a block of memory. 5368char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5369 char *addr, size_t bytes, bool read_only, 5370 bool allow_exec) { 5371 int prot; 5372 int flags; 5373 5374 if (read_only) { 5375 prot = PROT_READ; 5376 flags = MAP_SHARED; 5377 } else { 5378 prot = PROT_READ | PROT_WRITE; 5379 flags = MAP_PRIVATE; 5380 } 5381 5382 if (allow_exec) { 5383 prot |= PROT_EXEC; 5384 } 5385 5386 if (addr != NULL) { 5387 flags |= MAP_FIXED; 5388 } 5389 5390 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5391 fd, file_offset); 5392 if (mapped_address == MAP_FAILED) { 5393 return NULL; 5394 } 5395 return mapped_address; 5396} 5397 5398 5399// Remap a block of memory. 5400char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5401 char *addr, size_t bytes, bool read_only, 5402 bool allow_exec) { 5403 // same as map_memory() on this OS 5404 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5405 allow_exec); 5406} 5407 5408 5409// Unmap a block of memory. 5410bool os::unmap_memory(char* addr, size_t bytes) { 5411 return munmap(addr, bytes) == 0; 5412} 5413 5414void os::pause() { 5415 char filename[MAX_PATH]; 5416 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5417 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5418 } else { 5419 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5420 } 5421 5422 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5423 if (fd != -1) { 5424 struct stat buf; 5425 ::close(fd); 5426 while (::stat(filename, &buf) == 0) { 5427 (void)::poll(NULL, 0, 100); 5428 } 5429 } else { 5430 jio_fprintf(stderr, 5431 "Could not open pause file '%s', continuing immediately.\n", filename); 5432 } 5433} 5434 5435#ifndef PRODUCT 5436#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5437// Turn this on if you need to trace synch operations. 5438// Set RECORD_SYNCH_LIMIT to a large-enough value, 5439// and call record_synch_enable and record_synch_disable 5440// around the computation of interest. 5441 5442void record_synch(char* name, bool returning); // defined below 5443 5444class RecordSynch { 5445 char* _name; 5446 public: 5447 RecordSynch(char* name) :_name(name) 5448 { record_synch(_name, false); } 5449 ~RecordSynch() { record_synch(_name, true); } 5450}; 5451 5452#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5453extern "C" ret name params { \ 5454 typedef ret name##_t params; \ 5455 static name##_t* implem = NULL; \ 5456 static int callcount = 0; \ 5457 if (implem == NULL) { \ 5458 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5459 if (implem == NULL) fatal(dlerror()); \ 5460 } \ 5461 ++callcount; \ 5462 RecordSynch _rs(#name); \ 5463 inner; \ 5464 return implem args; \ 5465} 5466// in dbx, examine callcounts this way: 5467// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5468 5469#define CHECK_POINTER_OK(p) \ 5470 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5471#define CHECK_MU \ 5472 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5473#define CHECK_CV \ 5474 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5475#define CHECK_P(p) \ 5476 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5477 5478#define CHECK_MUTEX(mutex_op) \ 5479CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5480 5481CHECK_MUTEX( mutex_lock) 5482CHECK_MUTEX( _mutex_lock) 5483CHECK_MUTEX( mutex_unlock) 5484CHECK_MUTEX(_mutex_unlock) 5485CHECK_MUTEX( mutex_trylock) 5486CHECK_MUTEX(_mutex_trylock) 5487 5488#define CHECK_COND(cond_op) \ 5489CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5490 5491CHECK_COND( cond_wait); 5492CHECK_COND(_cond_wait); 5493CHECK_COND(_cond_wait_cancel); 5494 5495#define CHECK_COND2(cond_op) \ 5496CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5497 5498CHECK_COND2( cond_timedwait); 5499CHECK_COND2(_cond_timedwait); 5500CHECK_COND2(_cond_timedwait_cancel); 5501 5502// do the _lwp_* versions too 5503#define mutex_t lwp_mutex_t 5504#define cond_t lwp_cond_t 5505CHECK_MUTEX( _lwp_mutex_lock) 5506CHECK_MUTEX( _lwp_mutex_unlock) 5507CHECK_MUTEX( _lwp_mutex_trylock) 5508CHECK_MUTEX( __lwp_mutex_lock) 5509CHECK_MUTEX( __lwp_mutex_unlock) 5510CHECK_MUTEX( __lwp_mutex_trylock) 5511CHECK_MUTEX(___lwp_mutex_lock) 5512CHECK_MUTEX(___lwp_mutex_unlock) 5513 5514CHECK_COND( _lwp_cond_wait); 5515CHECK_COND( __lwp_cond_wait); 5516CHECK_COND(___lwp_cond_wait); 5517 5518CHECK_COND2( _lwp_cond_timedwait); 5519CHECK_COND2( __lwp_cond_timedwait); 5520#undef mutex_t 5521#undef cond_t 5522 5523CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5524CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5525CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5526CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5527CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5528CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5529CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5530CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5531 5532 5533// recording machinery: 5534 5535enum { RECORD_SYNCH_LIMIT = 200 }; 5536char* record_synch_name[RECORD_SYNCH_LIMIT]; 5537void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5538bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5539thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5540int record_synch_count = 0; 5541bool record_synch_enabled = false; 5542 5543// in dbx, examine recorded data this way: 5544// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5545 5546void record_synch(char* name, bool returning) { 5547 if (record_synch_enabled) { 5548 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5549 record_synch_name[record_synch_count] = name; 5550 record_synch_returning[record_synch_count] = returning; 5551 record_synch_thread[record_synch_count] = thr_self(); 5552 record_synch_arg0ptr[record_synch_count] = &name; 5553 record_synch_count++; 5554 } 5555 // put more checking code here: 5556 // ... 5557 } 5558} 5559 5560void record_synch_enable() { 5561 // start collecting trace data, if not already doing so 5562 if (!record_synch_enabled) record_synch_count = 0; 5563 record_synch_enabled = true; 5564} 5565 5566void record_synch_disable() { 5567 // stop collecting trace data 5568 record_synch_enabled = false; 5569} 5570 5571#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5572#endif // PRODUCT 5573 5574const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5575const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5576 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5577 5578 5579// JVMTI & JVM monitoring and management support 5580// The thread_cpu_time() and current_thread_cpu_time() are only 5581// supported if is_thread_cpu_time_supported() returns true. 5582// They are not supported on Solaris T1. 5583 5584// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5585// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5586// of a thread. 5587// 5588// current_thread_cpu_time() and thread_cpu_time(Thread *) 5589// returns the fast estimate available on the platform. 5590 5591// hrtime_t gethrvtime() return value includes 5592// user time but does not include system time 5593jlong os::current_thread_cpu_time() { 5594 return (jlong) gethrvtime(); 5595} 5596 5597jlong os::thread_cpu_time(Thread *thread) { 5598 // return user level CPU time only to be consistent with 5599 // what current_thread_cpu_time returns. 5600 // thread_cpu_time_info() must be changed if this changes 5601 return os::thread_cpu_time(thread, false /* user time only */); 5602} 5603 5604jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5605 if (user_sys_cpu_time) { 5606 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5607 } else { 5608 return os::current_thread_cpu_time(); 5609 } 5610} 5611 5612jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5613 char proc_name[64]; 5614 int count; 5615 prusage_t prusage; 5616 jlong lwp_time; 5617 int fd; 5618 5619 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5620 getpid(), 5621 thread->osthread()->lwp_id()); 5622 fd = ::open(proc_name, O_RDONLY); 5623 if ( fd == -1 ) return -1; 5624 5625 do { 5626 count = ::pread(fd, 5627 (void *)&prusage.pr_utime, 5628 thr_time_size, 5629 thr_time_off); 5630 } while (count < 0 && errno == EINTR); 5631 ::close(fd); 5632 if ( count < 0 ) return -1; 5633 5634 if (user_sys_cpu_time) { 5635 // user + system CPU time 5636 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5637 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5638 (jlong)prusage.pr_stime.tv_nsec + 5639 (jlong)prusage.pr_utime.tv_nsec; 5640 } else { 5641 // user level CPU time only 5642 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5643 (jlong)prusage.pr_utime.tv_nsec; 5644 } 5645 5646 return(lwp_time); 5647} 5648 5649void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5650 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5651 info_ptr->may_skip_backward = false; // elapsed time not wall time 5652 info_ptr->may_skip_forward = false; // elapsed time not wall time 5653 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5654} 5655 5656void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5657 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5658 info_ptr->may_skip_backward = false; // elapsed time not wall time 5659 info_ptr->may_skip_forward = false; // elapsed time not wall time 5660 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5661} 5662 5663bool os::is_thread_cpu_time_supported() { 5664 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5665 return true; 5666 } else { 5667 return false; 5668 } 5669} 5670 5671// System loadavg support. Returns -1 if load average cannot be obtained. 5672// Return the load average for our processor set if the primitive exists 5673// (Solaris 9 and later). Otherwise just return system wide loadavg. 5674int os::loadavg(double loadavg[], int nelem) { 5675 if (pset_getloadavg_ptr != NULL) { 5676 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5677 } else { 5678 return ::getloadavg(loadavg, nelem); 5679 } 5680} 5681 5682//--------------------------------------------------------------------------------- 5683 5684static address same_page(address x, address y) { 5685 intptr_t page_bits = -os::vm_page_size(); 5686 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5687 return x; 5688 else if (x > y) 5689 return (address)(intptr_t(y) | ~page_bits) + 1; 5690 else 5691 return (address)(intptr_t(y) & page_bits); 5692} 5693 5694bool os::find(address addr, outputStream* st) { 5695 Dl_info dlinfo; 5696 memset(&dlinfo, 0, sizeof(dlinfo)); 5697 if (dladdr(addr, &dlinfo)) { 5698#ifdef _LP64 5699 st->print("0x%016lx: ", addr); 5700#else 5701 st->print("0x%08x: ", addr); 5702#endif 5703 if (dlinfo.dli_sname != NULL) 5704 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5705 else if (dlinfo.dli_fname) 5706 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5707 else 5708 st->print("<absolute address>"); 5709 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5710#ifdef _LP64 5711 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5712#else 5713 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5714#endif 5715 st->cr(); 5716 5717 if (Verbose) { 5718 // decode some bytes around the PC 5719 address begin = same_page(addr-40, addr); 5720 address end = same_page(addr+40, addr); 5721 address lowest = (address) dlinfo.dli_sname; 5722 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5723 if (begin < lowest) begin = lowest; 5724 Dl_info dlinfo2; 5725 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5726 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5727 end = (address) dlinfo2.dli_saddr; 5728 Disassembler::decode(begin, end, st); 5729 } 5730 return true; 5731 } 5732 return false; 5733} 5734 5735// Following function has been added to support HotSparc's libjvm.so running 5736// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5737// src/solaris/hpi/native_threads in the EVM codebase. 5738// 5739// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5740// libraries and should thus be removed. We will leave it behind for a while 5741// until we no longer want to able to run on top of 1.3.0 Solaris production 5742// JDK. See 4341971. 5743 5744#define STACK_SLACK 0x800 5745 5746extern "C" { 5747 intptr_t sysThreadAvailableStackWithSlack() { 5748 stack_t st; 5749 intptr_t retval, stack_top; 5750 retval = thr_stksegment(&st); 5751 assert(retval == 0, "incorrect return value from thr_stksegment"); 5752 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5753 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5754 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5755 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5756 } 5757} 5758 5759// Just to get the Kernel build to link on solaris for testing. 5760 5761extern "C" { 5762class ASGCT_CallTrace; 5763void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5764 KERNEL_RETURN; 5765} 5766 5767 5768// ObjectMonitor park-unpark infrastructure ... 5769// 5770// We implement Solaris and Linux PlatformEvents with the 5771// obvious condvar-mutex-flag triple. 5772// Another alternative that works quite well is pipes: 5773// Each PlatformEvent consists of a pipe-pair. 5774// The thread associated with the PlatformEvent 5775// calls park(), which reads from the input end of the pipe. 5776// Unpark() writes into the other end of the pipe. 5777// The write-side of the pipe must be set NDELAY. 5778// Unfortunately pipes consume a large # of handles. 5779// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5780// Using pipes for the 1st few threads might be workable, however. 5781// 5782// park() is permitted to return spuriously. 5783// Callers of park() should wrap the call to park() in 5784// an appropriate loop. A litmus test for the correct 5785// usage of park is the following: if park() were modified 5786// to immediately return 0 your code should still work, 5787// albeit degenerating to a spin loop. 5788// 5789// An interesting optimization for park() is to use a trylock() 5790// to attempt to acquire the mutex. If the trylock() fails 5791// then we know that a concurrent unpark() operation is in-progress. 5792// in that case the park() code could simply set _count to 0 5793// and return immediately. The subsequent park() operation *might* 5794// return immediately. That's harmless as the caller of park() is 5795// expected to loop. By using trylock() we will have avoided a 5796// avoided a context switch caused by contention on the per-thread mutex. 5797// 5798// TODO-FIXME: 5799// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5800// objectmonitor implementation. 5801// 2. Collapse the JSR166 parker event, and the 5802// objectmonitor ParkEvent into a single "Event" construct. 5803// 3. In park() and unpark() add: 5804// assert (Thread::current() == AssociatedWith). 5805// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5806// 1-out-of-N park() operations will return immediately. 5807// 5808// _Event transitions in park() 5809// -1 => -1 : illegal 5810// 1 => 0 : pass - return immediately 5811// 0 => -1 : block 5812// 5813// _Event serves as a restricted-range semaphore. 5814// 5815// Another possible encoding of _Event would be with 5816// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5817// 5818// TODO-FIXME: add DTRACE probes for: 5819// 1. Tx parks 5820// 2. Ty unparks Tx 5821// 3. Tx resumes from park 5822 5823 5824// value determined through experimentation 5825#define ROUNDINGFIX 11 5826 5827// utility to compute the abstime argument to timedwait. 5828// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5829 5830static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5831 // millis is the relative timeout time 5832 // abstime will be the absolute timeout time 5833 if (millis < 0) millis = 0; 5834 struct timeval now; 5835 int status = gettimeofday(&now, NULL); 5836 assert(status == 0, "gettimeofday"); 5837 jlong seconds = millis / 1000; 5838 jlong max_wait_period; 5839 5840 if (UseLWPSynchronization) { 5841 // forward port of fix for 4275818 (not sleeping long enough) 5842 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5843 // _lwp_cond_timedwait() used a round_down algorithm rather 5844 // than a round_up. For millis less than our roundfactor 5845 // it rounded down to 0 which doesn't meet the spec. 5846 // For millis > roundfactor we may return a bit sooner, but 5847 // since we can not accurately identify the patch level and 5848 // this has already been fixed in Solaris 9 and 8 we will 5849 // leave it alone rather than always rounding down. 5850 5851 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5852 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5853 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5854 max_wait_period = 21000000; 5855 } else { 5856 max_wait_period = 50000000; 5857 } 5858 millis %= 1000; 5859 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5860 seconds = max_wait_period; 5861 } 5862 abstime->tv_sec = now.tv_sec + seconds; 5863 long usec = now.tv_usec + millis * 1000; 5864 if (usec >= 1000000) { 5865 abstime->tv_sec += 1; 5866 usec -= 1000000; 5867 } 5868 abstime->tv_nsec = usec * 1000; 5869 return abstime; 5870} 5871 5872// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5873// Conceptually TryPark() should be equivalent to park(0). 5874 5875int os::PlatformEvent::TryPark() { 5876 for (;;) { 5877 const int v = _Event ; 5878 guarantee ((v == 0) || (v == 1), "invariant") ; 5879 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5880 } 5881} 5882 5883void os::PlatformEvent::park() { // AKA: down() 5884 // Invariant: Only the thread associated with the Event/PlatformEvent 5885 // may call park(). 5886 int v ; 5887 for (;;) { 5888 v = _Event ; 5889 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5890 } 5891 guarantee (v >= 0, "invariant") ; 5892 if (v == 0) { 5893 // Do this the hard way by blocking ... 5894 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5895 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5896 // Only for SPARC >= V8PlusA 5897#if defined(__sparc) && defined(COMPILER2) 5898 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5899#endif 5900 int status = os::Solaris::mutex_lock(_mutex); 5901 assert_status(status == 0, status, "mutex_lock"); 5902 guarantee (_nParked == 0, "invariant") ; 5903 ++ _nParked ; 5904 while (_Event < 0) { 5905 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5906 // Treat this the same as if the wait was interrupted 5907 // With usr/lib/lwp going to kernel, always handle ETIME 5908 status = os::Solaris::cond_wait(_cond, _mutex); 5909 if (status == ETIME) status = EINTR ; 5910 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5911 } 5912 -- _nParked ; 5913 _Event = 0 ; 5914 status = os::Solaris::mutex_unlock(_mutex); 5915 assert_status(status == 0, status, "mutex_unlock"); 5916 } 5917} 5918 5919int os::PlatformEvent::park(jlong millis) { 5920 guarantee (_nParked == 0, "invariant") ; 5921 int v ; 5922 for (;;) { 5923 v = _Event ; 5924 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5925 } 5926 guarantee (v >= 0, "invariant") ; 5927 if (v != 0) return OS_OK ; 5928 5929 int ret = OS_TIMEOUT; 5930 timestruc_t abst; 5931 compute_abstime (&abst, millis); 5932 5933 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5934 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5935 // Only for SPARC >= V8PlusA 5936#if defined(__sparc) && defined(COMPILER2) 5937 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5938#endif 5939 int status = os::Solaris::mutex_lock(_mutex); 5940 assert_status(status == 0, status, "mutex_lock"); 5941 guarantee (_nParked == 0, "invariant") ; 5942 ++ _nParked ; 5943 while (_Event < 0) { 5944 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5945 assert_status(status == 0 || status == EINTR || 5946 status == ETIME || status == ETIMEDOUT, 5947 status, "cond_timedwait"); 5948 if (!FilterSpuriousWakeups) break ; // previous semantics 5949 if (status == ETIME || status == ETIMEDOUT) break ; 5950 // We consume and ignore EINTR and spurious wakeups. 5951 } 5952 -- _nParked ; 5953 if (_Event >= 0) ret = OS_OK ; 5954 _Event = 0 ; 5955 status = os::Solaris::mutex_unlock(_mutex); 5956 assert_status(status == 0, status, "mutex_unlock"); 5957 return ret; 5958} 5959 5960void os::PlatformEvent::unpark() { 5961 int v, AnyWaiters; 5962 5963 // Increment _Event. 5964 // Another acceptable implementation would be to simply swap 1 5965 // into _Event: 5966 // if (Swap (&_Event, 1) < 0) { 5967 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5968 // if (AnyWaiters) cond_signal (_cond) ; 5969 // } 5970 5971 for (;;) { 5972 v = _Event ; 5973 if (v > 0) { 5974 // The LD of _Event could have reordered or be satisfied 5975 // by a read-aside from this processor's write buffer. 5976 // To avoid problems execute a barrier and then 5977 // ratify the value. A degenerate CAS() would also work. 5978 // Viz., CAS (v+0, &_Event, v) == v). 5979 OrderAccess::fence() ; 5980 if (_Event == v) return ; 5981 continue ; 5982 } 5983 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5984 } 5985 5986 // If the thread associated with the event was parked, wake it. 5987 if (v < 0) { 5988 int status ; 5989 // Wait for the thread assoc with the PlatformEvent to vacate. 5990 status = os::Solaris::mutex_lock(_mutex); 5991 assert_status(status == 0, status, "mutex_lock"); 5992 AnyWaiters = _nParked ; 5993 status = os::Solaris::mutex_unlock(_mutex); 5994 assert_status(status == 0, status, "mutex_unlock"); 5995 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5996 if (AnyWaiters != 0) { 5997 // We intentional signal *after* dropping the lock 5998 // to avoid a common class of futile wakeups. 5999 status = os::Solaris::cond_signal(_cond); 6000 assert_status(status == 0, status, "cond_signal"); 6001 } 6002 } 6003} 6004 6005// JSR166 6006// ------------------------------------------------------- 6007 6008/* 6009 * The solaris and linux implementations of park/unpark are fairly 6010 * conservative for now, but can be improved. They currently use a 6011 * mutex/condvar pair, plus _counter. 6012 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6013 * sets count to 1 and signals condvar. Only one thread ever waits 6014 * on the condvar. Contention seen when trying to park implies that someone 6015 * is unparking you, so don't wait. And spurious returns are fine, so there 6016 * is no need to track notifications. 6017 */ 6018 6019#define NANOSECS_PER_SEC 1000000000 6020#define NANOSECS_PER_MILLISEC 1000000 6021#define MAX_SECS 100000000 6022 6023/* 6024 * This code is common to linux and solaris and will be moved to a 6025 * common place in dolphin. 6026 * 6027 * The passed in time value is either a relative time in nanoseconds 6028 * or an absolute time in milliseconds. Either way it has to be unpacked 6029 * into suitable seconds and nanoseconds components and stored in the 6030 * given timespec structure. 6031 * Given time is a 64-bit value and the time_t used in the timespec is only 6032 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6033 * overflow if times way in the future are given. Further on Solaris versions 6034 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6035 * number of seconds, in abstime, is less than current_time + 100,000,000. 6036 * As it will be 28 years before "now + 100000000" will overflow we can 6037 * ignore overflow and just impose a hard-limit on seconds using the value 6038 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6039 * years from "now". 6040 */ 6041static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6042 assert (time > 0, "convertTime"); 6043 6044 struct timeval now; 6045 int status = gettimeofday(&now, NULL); 6046 assert(status == 0, "gettimeofday"); 6047 6048 time_t max_secs = now.tv_sec + MAX_SECS; 6049 6050 if (isAbsolute) { 6051 jlong secs = time / 1000; 6052 if (secs > max_secs) { 6053 absTime->tv_sec = max_secs; 6054 } 6055 else { 6056 absTime->tv_sec = secs; 6057 } 6058 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6059 } 6060 else { 6061 jlong secs = time / NANOSECS_PER_SEC; 6062 if (secs >= MAX_SECS) { 6063 absTime->tv_sec = max_secs; 6064 absTime->tv_nsec = 0; 6065 } 6066 else { 6067 absTime->tv_sec = now.tv_sec + secs; 6068 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6069 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6070 absTime->tv_nsec -= NANOSECS_PER_SEC; 6071 ++absTime->tv_sec; // note: this must be <= max_secs 6072 } 6073 } 6074 } 6075 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6076 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6077 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6078 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6079} 6080 6081void Parker::park(bool isAbsolute, jlong time) { 6082 6083 // Optional fast-path check: 6084 // Return immediately if a permit is available. 6085 if (_counter > 0) { 6086 _counter = 0 ; 6087 OrderAccess::fence(); 6088 return ; 6089 } 6090 6091 // Optional fast-exit: Check interrupt before trying to wait 6092 Thread* thread = Thread::current(); 6093 assert(thread->is_Java_thread(), "Must be JavaThread"); 6094 JavaThread *jt = (JavaThread *)thread; 6095 if (Thread::is_interrupted(thread, false)) { 6096 return; 6097 } 6098 6099 // First, demultiplex/decode time arguments 6100 timespec absTime; 6101 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6102 return; 6103 } 6104 if (time > 0) { 6105 // Warning: this code might be exposed to the old Solaris time 6106 // round-down bugs. Grep "roundingFix" for details. 6107 unpackTime(&absTime, isAbsolute, time); 6108 } 6109 6110 // Enter safepoint region 6111 // Beware of deadlocks such as 6317397. 6112 // The per-thread Parker:: _mutex is a classic leaf-lock. 6113 // In particular a thread must never block on the Threads_lock while 6114 // holding the Parker:: mutex. If safepoints are pending both the 6115 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6116 ThreadBlockInVM tbivm(jt); 6117 6118 // Don't wait if cannot get lock since interference arises from 6119 // unblocking. Also. check interrupt before trying wait 6120 if (Thread::is_interrupted(thread, false) || 6121 os::Solaris::mutex_trylock(_mutex) != 0) { 6122 return; 6123 } 6124 6125 int status ; 6126 6127 if (_counter > 0) { // no wait needed 6128 _counter = 0; 6129 status = os::Solaris::mutex_unlock(_mutex); 6130 assert (status == 0, "invariant") ; 6131 OrderAccess::fence(); 6132 return; 6133 } 6134 6135#ifdef ASSERT 6136 // Don't catch signals while blocked; let the running threads have the signals. 6137 // (This allows a debugger to break into the running thread.) 6138 sigset_t oldsigs; 6139 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6140 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6141#endif 6142 6143 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6144 jt->set_suspend_equivalent(); 6145 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6146 6147 // Do this the hard way by blocking ... 6148 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6149 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6150 // Only for SPARC >= V8PlusA 6151#if defined(__sparc) && defined(COMPILER2) 6152 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6153#endif 6154 6155 if (time == 0) { 6156 status = os::Solaris::cond_wait (_cond, _mutex) ; 6157 } else { 6158 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6159 } 6160 // Note that an untimed cond_wait() can sometimes return ETIME on older 6161 // versions of the Solaris. 6162 assert_status(status == 0 || status == EINTR || 6163 status == ETIME || status == ETIMEDOUT, 6164 status, "cond_timedwait"); 6165 6166#ifdef ASSERT 6167 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6168#endif 6169 _counter = 0 ; 6170 status = os::Solaris::mutex_unlock(_mutex); 6171 assert_status(status == 0, status, "mutex_unlock") ; 6172 6173 // If externally suspended while waiting, re-suspend 6174 if (jt->handle_special_suspend_equivalent_condition()) { 6175 jt->java_suspend_self(); 6176 } 6177 OrderAccess::fence(); 6178} 6179 6180void Parker::unpark() { 6181 int s, status ; 6182 status = os::Solaris::mutex_lock (_mutex) ; 6183 assert (status == 0, "invariant") ; 6184 s = _counter; 6185 _counter = 1; 6186 status = os::Solaris::mutex_unlock (_mutex) ; 6187 assert (status == 0, "invariant") ; 6188 6189 if (s < 1) { 6190 status = os::Solaris::cond_signal (_cond) ; 6191 assert (status == 0, "invariant") ; 6192 } 6193} 6194 6195extern char** environ; 6196 6197// Run the specified command in a separate process. Return its exit value, 6198// or -1 on failure (e.g. can't fork a new process). 6199// Unlike system(), this function can be called from signal handler. It 6200// doesn't block SIGINT et al. 6201int os::fork_and_exec(char* cmd) { 6202 char * argv[4]; 6203 argv[0] = (char *)"sh"; 6204 argv[1] = (char *)"-c"; 6205 argv[2] = cmd; 6206 argv[3] = NULL; 6207 6208 // fork is async-safe, fork1 is not so can't use in signal handler 6209 pid_t pid; 6210 Thread* t = ThreadLocalStorage::get_thread_slow(); 6211 if (t != NULL && t->is_inside_signal_handler()) { 6212 pid = fork(); 6213 } else { 6214 pid = fork1(); 6215 } 6216 6217 if (pid < 0) { 6218 // fork failed 6219 warning("fork failed: %s", strerror(errno)); 6220 return -1; 6221 6222 } else if (pid == 0) { 6223 // child process 6224 6225 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6226 execve("/usr/bin/sh", argv, environ); 6227 6228 // execve failed 6229 _exit(-1); 6230 6231 } else { 6232 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6233 // care about the actual exit code, for now. 6234 6235 int status; 6236 6237 // Wait for the child process to exit. This returns immediately if 6238 // the child has already exited. */ 6239 while (waitpid(pid, &status, 0) < 0) { 6240 switch (errno) { 6241 case ECHILD: return 0; 6242 case EINTR: break; 6243 default: return -1; 6244 } 6245 } 6246 6247 if (WIFEXITED(status)) { 6248 // The child exited normally; get its exit code. 6249 return WEXITSTATUS(status); 6250 } else if (WIFSIGNALED(status)) { 6251 // The child exited because of a signal 6252 // The best value to return is 0x80 + signal number, 6253 // because that is what all Unix shells do, and because 6254 // it allows callers to distinguish between process exit and 6255 // process death by signal. 6256 return 0x80 + WTERMSIG(status); 6257 } else { 6258 // Unknown exit code; pass it through 6259 return status; 6260 } 6261 } 6262} 6263 6264// is_headless_jre() 6265// 6266// Test for the existence of libmawt in motif21 or xawt directories 6267// in order to report if we are running in a headless jre 6268// 6269bool os::is_headless_jre() { 6270 struct stat statbuf; 6271 char buf[MAXPATHLEN]; 6272 char libmawtpath[MAXPATHLEN]; 6273 const char *xawtstr = "/xawt/libmawt.so"; 6274 const char *motifstr = "/motif21/libmawt.so"; 6275 char *p; 6276 6277 // Get path to libjvm.so 6278 os::jvm_path(buf, sizeof(buf)); 6279 6280 // Get rid of libjvm.so 6281 p = strrchr(buf, '/'); 6282 if (p == NULL) return false; 6283 else *p = '\0'; 6284 6285 // Get rid of client or server 6286 p = strrchr(buf, '/'); 6287 if (p == NULL) return false; 6288 else *p = '\0'; 6289 6290 // check xawt/libmawt.so 6291 strcpy(libmawtpath, buf); 6292 strcat(libmawtpath, xawtstr); 6293 if (::stat(libmawtpath, &statbuf) == 0) return false; 6294 6295 // check motif21/libmawt.so 6296 strcpy(libmawtpath, buf); 6297 strcat(libmawtpath, motifstr); 6298 if (::stat(libmawtpath, &statbuf) == 0) return false; 6299 6300 return true; 6301} 6302 6303size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6304 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6305} 6306 6307int os::close(int fd) { 6308 RESTARTABLE_RETURN_INT(::close(fd)); 6309} 6310 6311int os::socket_close(int fd) { 6312 RESTARTABLE_RETURN_INT(::close(fd)); 6313} 6314 6315int os::recv(int fd, char *buf, int nBytes, int flags) { 6316 INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6317} 6318 6319 6320int os::send(int fd, char *buf, int nBytes, int flags) { 6321 INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6322} 6323 6324int os::raw_send(int fd, char *buf, int nBytes, int flags) { 6325 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 6326} 6327 6328// As both poll and select can be interrupted by signals, we have to be 6329// prepared to restart the system call after updating the timeout, unless 6330// a poll() is done with timeout == -1, in which case we repeat with this 6331// "wait forever" value. 6332 6333int os::timeout(int fd, long timeout) { 6334 int res; 6335 struct timeval t; 6336 julong prevtime, newtime; 6337 static const char* aNull = 0; 6338 struct pollfd pfd; 6339 pfd.fd = fd; 6340 pfd.events = POLLIN; 6341 6342 gettimeofday(&t, &aNull); 6343 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6344 6345 for(;;) { 6346 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6347 if(res == OS_ERR && errno == EINTR) { 6348 if(timeout != -1) { 6349 gettimeofday(&t, &aNull); 6350 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6351 timeout -= newtime - prevtime; 6352 if(timeout <= 0) 6353 return OS_OK; 6354 prevtime = newtime; 6355 } 6356 } else return res; 6357 } 6358} 6359 6360int os::connect(int fd, struct sockaddr *him, int len) { 6361 int _result; 6362 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result, 6363 os::Solaris::clear_interrupted); 6364 6365 // Depending on when thread interruption is reset, _result could be 6366 // one of two values when errno == EINTR 6367 6368 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6369 && (errno == EINTR)) { 6370 /* restarting a connect() changes its errno semantics */ 6371 INTERRUPTIBLE(::connect(fd, him, len), _result, 6372 os::Solaris::clear_interrupted); 6373 /* undo these changes */ 6374 if (_result == OS_ERR) { 6375 if (errno == EALREADY) { 6376 errno = EINPROGRESS; /* fall through */ 6377 } else if (errno == EISCONN) { 6378 errno = 0; 6379 return OS_OK; 6380 } 6381 } 6382 } 6383 return _result; 6384 } 6385 6386int os::accept(int fd, struct sockaddr *him, int *len) { 6387 if (fd < 0) 6388 return OS_ERR; 6389 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him,\ 6390 (socklen_t*) len), os::Solaris::clear_interrupted); 6391 } 6392 6393int os::recvfrom(int fd, char *buf, int nBytes, int flags, 6394 sockaddr *from, int *fromlen) { 6395 //%%note jvm_r11 6396 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes,\ 6397 flags, from, fromlen), os::Solaris::clear_interrupted); 6398} 6399 6400int os::sendto(int fd, char *buf, int len, int flags, 6401 struct sockaddr *to, int tolen) { 6402 //%%note jvm_r11 6403 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags,\ 6404 to, tolen), os::Solaris::clear_interrupted); 6405} 6406 6407int os::socket_available(int fd, jint *pbytes) { 6408 if (fd < 0) 6409 return OS_OK; 6410 6411 int ret; 6412 6413 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6414 6415 //%% note ioctl can return 0 when successful, JVM_SocketAvailable 6416 // is expected to return 0 on failure and 1 on success to the jdk. 6417 6418 return (ret == OS_ERR) ? 0 : 1; 6419} 6420 6421 6422int os::bind(int fd, struct sockaddr *him, int len) { 6423 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6424 os::Solaris::clear_interrupted); 6425} 6426 6427