os_solaris.cpp revision 2131:2a57c59eb548
1/* 2 * Copyright (c) 1997, 2011, 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->set_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 1887// This must be hard coded because it's the system's temporary 1888// directory not the java application's temp directory, ala java.io.tmpdir. 1889const char* os::get_temp_directory() { return "/tmp"; } 1890 1891static bool file_exists(const char* filename) { 1892 struct stat statbuf; 1893 if (filename == NULL || strlen(filename) == 0) { 1894 return false; 1895 } 1896 return os::stat(filename, &statbuf) == 0; 1897} 1898 1899void os::dll_build_name(char* buffer, size_t buflen, 1900 const char* pname, const char* fname) { 1901 const size_t pnamelen = pname ? strlen(pname) : 0; 1902 1903 // Quietly truncate on buffer overflow. Should be an error. 1904 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1905 *buffer = '\0'; 1906 return; 1907 } 1908 1909 if (pnamelen == 0) { 1910 snprintf(buffer, buflen, "lib%s.so", fname); 1911 } else if (strchr(pname, *os::path_separator()) != NULL) { 1912 int n; 1913 char** pelements = split_path(pname, &n); 1914 for (int i = 0 ; i < n ; i++) { 1915 // really shouldn't be NULL but what the heck, check can't hurt 1916 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1917 continue; // skip the empty path values 1918 } 1919 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1920 if (file_exists(buffer)) { 1921 break; 1922 } 1923 } 1924 // release the storage 1925 for (int i = 0 ; i < n ; i++) { 1926 if (pelements[i] != NULL) { 1927 FREE_C_HEAP_ARRAY(char, pelements[i]); 1928 } 1929 } 1930 if (pelements != NULL) { 1931 FREE_C_HEAP_ARRAY(char*, pelements); 1932 } 1933 } else { 1934 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1935 } 1936} 1937 1938const char* os::get_current_directory(char *buf, int buflen) { 1939 return getcwd(buf, buflen); 1940} 1941 1942// check if addr is inside libjvm[_g].so 1943bool os::address_is_in_vm(address addr) { 1944 static address libjvm_base_addr; 1945 Dl_info dlinfo; 1946 1947 if (libjvm_base_addr == NULL) { 1948 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1949 libjvm_base_addr = (address)dlinfo.dli_fbase; 1950 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1951 } 1952 1953 if (dladdr((void *)addr, &dlinfo)) { 1954 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1955 } 1956 1957 return false; 1958} 1959 1960typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1961static dladdr1_func_type dladdr1_func = NULL; 1962 1963bool os::dll_address_to_function_name(address addr, char *buf, 1964 int buflen, int * offset) { 1965 Dl_info dlinfo; 1966 1967 // dladdr1_func was initialized in os::init() 1968 if (dladdr1_func){ 1969 // yes, we have dladdr1 1970 1971 // Support for dladdr1 is checked at runtime; it may be 1972 // available even if the vm is built on a machine that does 1973 // not have dladdr1 support. Make sure there is a value for 1974 // RTLD_DL_SYMENT. 1975 #ifndef RTLD_DL_SYMENT 1976 #define RTLD_DL_SYMENT 1 1977 #endif 1978#ifdef _LP64 1979 Elf64_Sym * info; 1980#else 1981 Elf32_Sym * info; 1982#endif 1983 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1984 RTLD_DL_SYMENT)) { 1985 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1986 if (buf != NULL) { 1987 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1988 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1989 } 1990 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1991 return true; 1992 } 1993 } 1994 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1995 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1996 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 1997 return true; 1998 } 1999 } 2000 if (buf != NULL) buf[0] = '\0'; 2001 if (offset != NULL) *offset = -1; 2002 return false; 2003 } else { 2004 // no, only dladdr is available 2005 if (dladdr((void *)addr, &dlinfo)) { 2006 if (buf != NULL) { 2007 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2008 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2009 } 2010 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2011 return true; 2012 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2013 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2014 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 2015 return true; 2016 } 2017 } 2018 if (buf != NULL) buf[0] = '\0'; 2019 if (offset != NULL) *offset = -1; 2020 return false; 2021 } 2022} 2023 2024bool os::dll_address_to_library_name(address addr, char* buf, 2025 int buflen, int* offset) { 2026 Dl_info dlinfo; 2027 2028 if (dladdr((void*)addr, &dlinfo)){ 2029 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2030 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2031 return true; 2032 } else { 2033 if (buf) buf[0] = '\0'; 2034 if (offset) *offset = -1; 2035 return false; 2036 } 2037} 2038 2039// Prints the names and full paths of all opened dynamic libraries 2040// for current process 2041void os::print_dll_info(outputStream * st) { 2042 Dl_info dli; 2043 void *handle; 2044 Link_map *map; 2045 Link_map *p; 2046 2047 st->print_cr("Dynamic libraries:"); st->flush(); 2048 2049 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2050 st->print_cr("Error: Cannot print dynamic libraries."); 2051 return; 2052 } 2053 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2054 if (handle == NULL) { 2055 st->print_cr("Error: Cannot print dynamic libraries."); 2056 return; 2057 } 2058 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2059 if (map == NULL) { 2060 st->print_cr("Error: Cannot print dynamic libraries."); 2061 return; 2062 } 2063 2064 while (map->l_prev != NULL) 2065 map = map->l_prev; 2066 2067 while (map != NULL) { 2068 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2069 map = map->l_next; 2070 } 2071 2072 dlclose(handle); 2073} 2074 2075 // Loads .dll/.so and 2076 // in case of error it checks if .dll/.so was built for the 2077 // same architecture as Hotspot is running on 2078 2079void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2080{ 2081 void * result= ::dlopen(filename, RTLD_LAZY); 2082 if (result != NULL) { 2083 // Successful loading 2084 return result; 2085 } 2086 2087 Elf32_Ehdr elf_head; 2088 2089 // Read system error message into ebuf 2090 // It may or may not be overwritten below 2091 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2092 ebuf[ebuflen-1]='\0'; 2093 int diag_msg_max_length=ebuflen-strlen(ebuf); 2094 char* diag_msg_buf=ebuf+strlen(ebuf); 2095 2096 if (diag_msg_max_length==0) { 2097 // No more space in ebuf for additional diagnostics message 2098 return NULL; 2099 } 2100 2101 2102 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2103 2104 if (file_descriptor < 0) { 2105 // Can't open library, report dlerror() message 2106 return NULL; 2107 } 2108 2109 bool failed_to_read_elf_head= 2110 (sizeof(elf_head)!= 2111 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2112 2113 ::close(file_descriptor); 2114 if (failed_to_read_elf_head) { 2115 // file i/o error - report dlerror() msg 2116 return NULL; 2117 } 2118 2119 typedef struct { 2120 Elf32_Half code; // Actual value as defined in elf.h 2121 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2122 char elf_class; // 32 or 64 bit 2123 char endianess; // MSB or LSB 2124 char* name; // String representation 2125 } arch_t; 2126 2127 static const arch_t arch_array[]={ 2128 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2129 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2130 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2131 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2132 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2133 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2134 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2135 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2136 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2137 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2138 }; 2139 2140 #if (defined IA32) 2141 static Elf32_Half running_arch_code=EM_386; 2142 #elif (defined AMD64) 2143 static Elf32_Half running_arch_code=EM_X86_64; 2144 #elif (defined IA64) 2145 static Elf32_Half running_arch_code=EM_IA_64; 2146 #elif (defined __sparc) && (defined _LP64) 2147 static Elf32_Half running_arch_code=EM_SPARCV9; 2148 #elif (defined __sparc) && (!defined _LP64) 2149 static Elf32_Half running_arch_code=EM_SPARC; 2150 #elif (defined __powerpc64__) 2151 static Elf32_Half running_arch_code=EM_PPC64; 2152 #elif (defined __powerpc__) 2153 static Elf32_Half running_arch_code=EM_PPC; 2154 #elif (defined ARM) 2155 static Elf32_Half running_arch_code=EM_ARM; 2156 #else 2157 #error Method os::dll_load requires that one of following is defined:\ 2158 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2159 #endif 2160 2161 // Identify compatability class for VM's architecture and library's architecture 2162 // Obtain string descriptions for architectures 2163 2164 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2165 int running_arch_index=-1; 2166 2167 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2168 if (running_arch_code == arch_array[i].code) { 2169 running_arch_index = i; 2170 } 2171 if (lib_arch.code == arch_array[i].code) { 2172 lib_arch.compat_class = arch_array[i].compat_class; 2173 lib_arch.name = arch_array[i].name; 2174 } 2175 } 2176 2177 assert(running_arch_index != -1, 2178 "Didn't find running architecture code (running_arch_code) in arch_array"); 2179 if (running_arch_index == -1) { 2180 // Even though running architecture detection failed 2181 // we may still continue with reporting dlerror() message 2182 return NULL; 2183 } 2184 2185 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2187 return NULL; 2188 } 2189 2190 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2191 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2192 return NULL; 2193 } 2194 2195 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2196 if ( lib_arch.name!=NULL ) { 2197 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2198 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2199 lib_arch.name, arch_array[running_arch_index].name); 2200 } else { 2201 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2202 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2203 lib_arch.code, 2204 arch_array[running_arch_index].name); 2205 } 2206 } 2207 2208 return NULL; 2209} 2210 2211void* os::dll_lookup(void* handle, const char* name) { 2212 return dlsym(handle, name); 2213} 2214 2215int os::stat(const char *path, struct stat *sbuf) { 2216 char pathbuf[MAX_PATH]; 2217 if (strlen(path) > MAX_PATH - 1) { 2218 errno = ENAMETOOLONG; 2219 return -1; 2220 } 2221 os::native_path(strcpy(pathbuf, path)); 2222 return ::stat(pathbuf, sbuf); 2223} 2224 2225static bool _print_ascii_file(const char* filename, outputStream* st) { 2226 int fd = ::open(filename, O_RDONLY); 2227 if (fd == -1) { 2228 return false; 2229 } 2230 2231 char buf[32]; 2232 int bytes; 2233 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2234 st->print_raw(buf, bytes); 2235 } 2236 2237 ::close(fd); 2238 2239 return true; 2240} 2241 2242void os::print_os_info(outputStream* st) { 2243 st->print("OS:"); 2244 2245 if (!_print_ascii_file("/etc/release", st)) { 2246 st->print("Solaris"); 2247 } 2248 st->cr(); 2249 2250 // kernel 2251 st->print("uname:"); 2252 struct utsname name; 2253 uname(&name); 2254 st->print(name.sysname); st->print(" "); 2255 st->print(name.release); st->print(" "); 2256 st->print(name.version); st->print(" "); 2257 st->print(name.machine); 2258 2259 // libthread 2260 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2261 else st->print(" (T1 libthread)"); 2262 st->cr(); 2263 2264 // rlimit 2265 st->print("rlimit:"); 2266 struct rlimit rlim; 2267 2268 st->print(" STACK "); 2269 getrlimit(RLIMIT_STACK, &rlim); 2270 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2271 else st->print("%uk", rlim.rlim_cur >> 10); 2272 2273 st->print(", CORE "); 2274 getrlimit(RLIMIT_CORE, &rlim); 2275 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2276 else st->print("%uk", rlim.rlim_cur >> 10); 2277 2278 st->print(", NOFILE "); 2279 getrlimit(RLIMIT_NOFILE, &rlim); 2280 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2281 else st->print("%d", rlim.rlim_cur); 2282 2283 st->print(", AS "); 2284 getrlimit(RLIMIT_AS, &rlim); 2285 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2286 else st->print("%uk", rlim.rlim_cur >> 10); 2287 st->cr(); 2288 2289 // load average 2290 st->print("load average:"); 2291 double loadavg[3]; 2292 os::loadavg(loadavg, 3); 2293 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2294 st->cr(); 2295} 2296 2297 2298static bool check_addr0(outputStream* st) { 2299 jboolean status = false; 2300 int fd = ::open("/proc/self/map",O_RDONLY); 2301 if (fd >= 0) { 2302 prmap_t p; 2303 while(::read(fd, &p, sizeof(p)) > 0) { 2304 if (p.pr_vaddr == 0x0) { 2305 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2306 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2307 st->print("Access:"); 2308 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2309 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2310 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2311 st->cr(); 2312 status = true; 2313 } 2314 ::close(fd); 2315 } 2316 } 2317 return status; 2318} 2319 2320void os::print_memory_info(outputStream* st) { 2321 st->print("Memory:"); 2322 st->print(" %dk page", os::vm_page_size()>>10); 2323 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2324 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2325 st->cr(); 2326 (void) check_addr0(st); 2327} 2328 2329// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2330// but they're the same for all the solaris architectures that we support. 2331const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2332 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2333 "ILL_COPROC", "ILL_BADSTK" }; 2334 2335const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2336 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2337 "FPE_FLTINV", "FPE_FLTSUB" }; 2338 2339const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2340 2341const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2342 2343void os::print_siginfo(outputStream* st, void* siginfo) { 2344 st->print("siginfo:"); 2345 2346 const int buflen = 100; 2347 char buf[buflen]; 2348 siginfo_t *si = (siginfo_t*)siginfo; 2349 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2350 char *err = strerror(si->si_errno); 2351 if (si->si_errno != 0 && err != NULL) { 2352 st->print("si_errno=%s", err); 2353 } else { 2354 st->print("si_errno=%d", si->si_errno); 2355 } 2356 const int c = si->si_code; 2357 assert(c > 0, "unexpected si_code"); 2358 switch (si->si_signo) { 2359 case SIGILL: 2360 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2361 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2362 break; 2363 case SIGFPE: 2364 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2365 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2366 break; 2367 case SIGSEGV: 2368 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2369 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2370 break; 2371 case SIGBUS: 2372 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2373 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2374 break; 2375 default: 2376 st->print(", si_code=%d", si->si_code); 2377 // no si_addr 2378 } 2379 2380 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2381 UseSharedSpaces) { 2382 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2383 if (mapinfo->is_in_shared_space(si->si_addr)) { 2384 st->print("\n\nError accessing class data sharing archive." \ 2385 " Mapped file inaccessible during execution, " \ 2386 " possible disk/network problem."); 2387 } 2388 } 2389 st->cr(); 2390} 2391 2392// Moved from whole group, because we need them here for diagnostic 2393// prints. 2394#define OLDMAXSIGNUM 32 2395static int Maxsignum = 0; 2396static int *ourSigFlags = NULL; 2397 2398extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2399 2400int os::Solaris::get_our_sigflags(int sig) { 2401 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2402 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2403 return ourSigFlags[sig]; 2404} 2405 2406void os::Solaris::set_our_sigflags(int sig, int flags) { 2407 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2408 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2409 ourSigFlags[sig] = flags; 2410} 2411 2412 2413static const char* get_signal_handler_name(address handler, 2414 char* buf, int buflen) { 2415 int offset; 2416 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2417 if (found) { 2418 // skip directory names 2419 const char *p1, *p2; 2420 p1 = buf; 2421 size_t len = strlen(os::file_separator()); 2422 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2423 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2424 } else { 2425 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2426 } 2427 return buf; 2428} 2429 2430static void print_signal_handler(outputStream* st, int sig, 2431 char* buf, size_t buflen) { 2432 struct sigaction sa; 2433 2434 sigaction(sig, NULL, &sa); 2435 2436 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2437 2438 address handler = (sa.sa_flags & SA_SIGINFO) 2439 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2440 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2441 2442 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2443 st->print("SIG_DFL"); 2444 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2445 st->print("SIG_IGN"); 2446 } else { 2447 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2448 } 2449 2450 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2451 2452 address rh = VMError::get_resetted_sighandler(sig); 2453 // May be, handler was resetted by VMError? 2454 if(rh != NULL) { 2455 handler = rh; 2456 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2457 } 2458 2459 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2460 2461 // Check: is it our handler? 2462 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2463 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2464 // It is our signal handler 2465 // check for flags 2466 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2467 st->print( 2468 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2469 os::Solaris::get_our_sigflags(sig)); 2470 } 2471 } 2472 st->cr(); 2473} 2474 2475void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2476 st->print_cr("Signal Handlers:"); 2477 print_signal_handler(st, SIGSEGV, buf, buflen); 2478 print_signal_handler(st, SIGBUS , buf, buflen); 2479 print_signal_handler(st, SIGFPE , buf, buflen); 2480 print_signal_handler(st, SIGPIPE, buf, buflen); 2481 print_signal_handler(st, SIGXFSZ, buf, buflen); 2482 print_signal_handler(st, SIGILL , buf, buflen); 2483 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2484 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2485 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2486 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2487 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2488 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2489 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2490 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2491} 2492 2493static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2494 2495// Find the full path to the current module, libjvm.so or libjvm_g.so 2496void os::jvm_path(char *buf, jint buflen) { 2497 // Error checking. 2498 if (buflen < MAXPATHLEN) { 2499 assert(false, "must use a large-enough buffer"); 2500 buf[0] = '\0'; 2501 return; 2502 } 2503 // Lazy resolve the path to current module. 2504 if (saved_jvm_path[0] != 0) { 2505 strcpy(buf, saved_jvm_path); 2506 return; 2507 } 2508 2509 Dl_info dlinfo; 2510 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2511 assert(ret != 0, "cannot locate libjvm"); 2512 realpath((char *)dlinfo.dli_fname, buf); 2513 2514 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2515 // Support for the gamma launcher. Typical value for buf is 2516 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2517 // the right place in the string, then assume we are installed in a JDK and 2518 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2519 // up the path so it looks like libjvm.so is installed there (append a 2520 // fake suffix hotspot/libjvm.so). 2521 const char *p = buf + strlen(buf) - 1; 2522 for (int count = 0; p > buf && count < 5; ++count) { 2523 for (--p; p > buf && *p != '/'; --p) 2524 /* empty */ ; 2525 } 2526 2527 if (strncmp(p, "/jre/lib/", 9) != 0) { 2528 // Look for JAVA_HOME in the environment. 2529 char* java_home_var = ::getenv("JAVA_HOME"); 2530 if (java_home_var != NULL && java_home_var[0] != 0) { 2531 char cpu_arch[12]; 2532 char* jrelib_p; 2533 int len; 2534 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2535#ifdef _LP64 2536 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2537 if (strcmp(cpu_arch, "sparc") == 0) { 2538 strcat(cpu_arch, "v9"); 2539 } else if (strcmp(cpu_arch, "i386") == 0) { 2540 strcpy(cpu_arch, "amd64"); 2541 } 2542#endif 2543 // Check the current module name "libjvm.so" or "libjvm_g.so". 2544 p = strrchr(buf, '/'); 2545 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2546 p = strstr(p, "_g") ? "_g" : ""; 2547 2548 realpath(java_home_var, buf); 2549 // determine if this is a legacy image or modules image 2550 // modules image doesn't have "jre" subdirectory 2551 len = strlen(buf); 2552 jrelib_p = buf + len; 2553 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2554 if (0 != access(buf, F_OK)) { 2555 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2556 } 2557 2558 if (0 == access(buf, F_OK)) { 2559 // Use current module name "libjvm[_g].so" instead of 2560 // "libjvm"debug_only("_g")".so" since for fastdebug version 2561 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2562 len = strlen(buf); 2563 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p); 2564 } else { 2565 // Go back to path of .so 2566 realpath((char *)dlinfo.dli_fname, buf); 2567 } 2568 } 2569 } 2570 } 2571 2572 strcpy(saved_jvm_path, buf); 2573} 2574 2575 2576void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2577 // no prefix required, not even "_" 2578} 2579 2580 2581void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2582 // no suffix required 2583} 2584 2585// This method is a copy of JDK's sysGetLastErrorString 2586// from src/solaris/hpi/src/system_md.c 2587 2588size_t os::lasterror(char *buf, size_t len) { 2589 2590 if (errno == 0) return 0; 2591 2592 const char *s = ::strerror(errno); 2593 size_t n = ::strlen(s); 2594 if (n >= len) { 2595 n = len - 1; 2596 } 2597 ::strncpy(buf, s, n); 2598 buf[n] = '\0'; 2599 return n; 2600} 2601 2602 2603// sun.misc.Signal 2604 2605extern "C" { 2606 static void UserHandler(int sig, void *siginfo, void *context) { 2607 // Ctrl-C is pressed during error reporting, likely because the error 2608 // handler fails to abort. Let VM die immediately. 2609 if (sig == SIGINT && is_error_reported()) { 2610 os::die(); 2611 } 2612 2613 os::signal_notify(sig); 2614 // We do not need to reinstate the signal handler each time... 2615 } 2616} 2617 2618void* os::user_handler() { 2619 return CAST_FROM_FN_PTR(void*, UserHandler); 2620} 2621 2622extern "C" { 2623 typedef void (*sa_handler_t)(int); 2624 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2625} 2626 2627void* os::signal(int signal_number, void* handler) { 2628 struct sigaction sigAct, oldSigAct; 2629 sigfillset(&(sigAct.sa_mask)); 2630 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2631 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2632 2633 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2634 // -1 means registration failed 2635 return (void *)-1; 2636 2637 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2638} 2639 2640void os::signal_raise(int signal_number) { 2641 raise(signal_number); 2642} 2643 2644/* 2645 * The following code is moved from os.cpp for making this 2646 * code platform specific, which it is by its very nature. 2647 */ 2648 2649// a counter for each possible signal value 2650static int Sigexit = 0; 2651static int Maxlibjsigsigs; 2652static jint *pending_signals = NULL; 2653static int *preinstalled_sigs = NULL; 2654static struct sigaction *chainedsigactions = NULL; 2655static sema_t sig_sem; 2656typedef int (*version_getting_t)(); 2657version_getting_t os::Solaris::get_libjsig_version = NULL; 2658static int libjsigversion = NULL; 2659 2660int os::sigexitnum_pd() { 2661 assert(Sigexit > 0, "signal memory not yet initialized"); 2662 return Sigexit; 2663} 2664 2665void os::Solaris::init_signal_mem() { 2666 // Initialize signal structures 2667 Maxsignum = SIGRTMAX; 2668 Sigexit = Maxsignum+1; 2669 assert(Maxsignum >0, "Unable to obtain max signal number"); 2670 2671 Maxlibjsigsigs = Maxsignum; 2672 2673 // pending_signals has one int per signal 2674 // The additional signal is for SIGEXIT - exit signal to signal_thread 2675 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2676 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2677 2678 if (UseSignalChaining) { 2679 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2680 * (Maxsignum + 1)); 2681 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2682 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2683 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2684 } 2685 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2686 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2687} 2688 2689void os::signal_init_pd() { 2690 int ret; 2691 2692 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2693 assert(ret == 0, "sema_init() failed"); 2694} 2695 2696void os::signal_notify(int signal_number) { 2697 int ret; 2698 2699 Atomic::inc(&pending_signals[signal_number]); 2700 ret = ::sema_post(&sig_sem); 2701 assert(ret == 0, "sema_post() failed"); 2702} 2703 2704static int check_pending_signals(bool wait_for_signal) { 2705 int ret; 2706 while (true) { 2707 for (int i = 0; i < Sigexit + 1; i++) { 2708 jint n = pending_signals[i]; 2709 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2710 return i; 2711 } 2712 } 2713 if (!wait_for_signal) { 2714 return -1; 2715 } 2716 JavaThread *thread = JavaThread::current(); 2717 ThreadBlockInVM tbivm(thread); 2718 2719 bool threadIsSuspended; 2720 do { 2721 thread->set_suspend_equivalent(); 2722 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2723 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2724 ; 2725 assert(ret == 0, "sema_wait() failed"); 2726 2727 // were we externally suspended while we were waiting? 2728 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2729 if (threadIsSuspended) { 2730 // 2731 // The semaphore has been incremented, but while we were waiting 2732 // another thread suspended us. We don't want to continue running 2733 // while suspended because that would surprise the thread that 2734 // suspended us. 2735 // 2736 ret = ::sema_post(&sig_sem); 2737 assert(ret == 0, "sema_post() failed"); 2738 2739 thread->java_suspend_self(); 2740 } 2741 } while (threadIsSuspended); 2742 } 2743} 2744 2745int os::signal_lookup() { 2746 return check_pending_signals(false); 2747} 2748 2749int os::signal_wait() { 2750 return check_pending_signals(true); 2751} 2752 2753//////////////////////////////////////////////////////////////////////////////// 2754// Virtual Memory 2755 2756static int page_size = -1; 2757 2758// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2759// clear this var if support is not available. 2760static bool has_map_align = true; 2761 2762int os::vm_page_size() { 2763 assert(page_size != -1, "must call os::init"); 2764 return page_size; 2765} 2766 2767// Solaris allocates memory by pages. 2768int os::vm_allocation_granularity() { 2769 assert(page_size != -1, "must call os::init"); 2770 return page_size; 2771} 2772 2773bool os::commit_memory(char* addr, size_t bytes, bool exec) { 2774 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2775 size_t size = bytes; 2776 return 2777 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2778} 2779 2780bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2781 bool exec) { 2782 if (commit_memory(addr, bytes, exec)) { 2783 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2784 // If the large page size has been set and the VM 2785 // is using large pages, use the large page size 2786 // if it is smaller than the alignment hint. This is 2787 // a case where the VM wants to use a larger alignment size 2788 // for its own reasons but still want to use large pages 2789 // (which is what matters to setting the mpss range. 2790 size_t page_size = 0; 2791 if (large_page_size() < alignment_hint) { 2792 assert(UseLargePages, "Expected to be here for large page use only"); 2793 page_size = large_page_size(); 2794 } else { 2795 // If the alignment hint is less than the large page 2796 // size, the VM wants a particular alignment (thus the hint) 2797 // for internal reasons. Try to set the mpss range using 2798 // the alignment_hint. 2799 page_size = alignment_hint; 2800 } 2801 // Since this is a hint, ignore any failures. 2802 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2803 } 2804 return true; 2805 } 2806 return false; 2807} 2808 2809// Uncommit the pages in a specified region. 2810void os::free_memory(char* addr, size_t bytes) { 2811 if (madvise(addr, bytes, MADV_FREE) < 0) { 2812 debug_only(warning("MADV_FREE failed.")); 2813 return; 2814 } 2815} 2816 2817bool os::create_stack_guard_pages(char* addr, size_t size) { 2818 return os::commit_memory(addr, size); 2819} 2820 2821bool os::remove_stack_guard_pages(char* addr, size_t size) { 2822 return os::uncommit_memory(addr, size); 2823} 2824 2825// Change the page size in a given range. 2826void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2827 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2828 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2829 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2830} 2831 2832// Tell the OS to make the range local to the first-touching LWP 2833void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2834 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2835 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2836 debug_only(warning("MADV_ACCESS_LWP failed.")); 2837 } 2838} 2839 2840// Tell the OS that this range would be accessed from different LWPs. 2841void os::numa_make_global(char *addr, size_t bytes) { 2842 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2843 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2844 debug_only(warning("MADV_ACCESS_MANY failed.")); 2845 } 2846} 2847 2848// Get the number of the locality groups. 2849size_t os::numa_get_groups_num() { 2850 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2851 return n != -1 ? n : 1; 2852} 2853 2854// Get a list of leaf locality groups. A leaf lgroup is group that 2855// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2856// board. An LWP is assigned to one of these groups upon creation. 2857size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2858 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2859 ids[0] = 0; 2860 return 1; 2861 } 2862 int result_size = 0, top = 1, bottom = 0, cur = 0; 2863 for (int k = 0; k < size; k++) { 2864 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2865 (Solaris::lgrp_id_t*)&ids[top], size - top); 2866 if (r == -1) { 2867 ids[0] = 0; 2868 return 1; 2869 } 2870 if (!r) { 2871 // That's a leaf node. 2872 assert (bottom <= cur, "Sanity check"); 2873 // Check if the node has memory 2874 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2875 NULL, 0, LGRP_RSRC_MEM) > 0) { 2876 ids[bottom++] = ids[cur]; 2877 } 2878 } 2879 top += r; 2880 cur++; 2881 } 2882 if (bottom == 0) { 2883 // Handle a situation, when the OS reports no memory available. 2884 // Assume UMA architecture. 2885 ids[0] = 0; 2886 return 1; 2887 } 2888 return bottom; 2889} 2890 2891// Detect the topology change. Typically happens during CPU plugging-unplugging. 2892bool os::numa_topology_changed() { 2893 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2894 if (is_stale != -1 && is_stale) { 2895 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2896 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2897 assert(c != 0, "Failure to initialize LGRP API"); 2898 Solaris::set_lgrp_cookie(c); 2899 return true; 2900 } 2901 return false; 2902} 2903 2904// Get the group id of the current LWP. 2905int os::numa_get_group_id() { 2906 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2907 if (lgrp_id == -1) { 2908 return 0; 2909 } 2910 const int size = os::numa_get_groups_num(); 2911 int *ids = (int*)alloca(size * sizeof(int)); 2912 2913 // Get the ids of all lgroups with memory; r is the count. 2914 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2915 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2916 if (r <= 0) { 2917 return 0; 2918 } 2919 return ids[os::random() % r]; 2920} 2921 2922// Request information about the page. 2923bool os::get_page_info(char *start, page_info* info) { 2924 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2925 uint64_t addr = (uintptr_t)start; 2926 uint64_t outdata[2]; 2927 uint_t validity = 0; 2928 2929 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2930 return false; 2931 } 2932 2933 info->size = 0; 2934 info->lgrp_id = -1; 2935 2936 if ((validity & 1) != 0) { 2937 if ((validity & 2) != 0) { 2938 info->lgrp_id = outdata[0]; 2939 } 2940 if ((validity & 4) != 0) { 2941 info->size = outdata[1]; 2942 } 2943 return true; 2944 } 2945 return false; 2946} 2947 2948// Scan the pages from start to end until a page different than 2949// the one described in the info parameter is encountered. 2950char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2951 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2952 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2953 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2954 uint_t validity[MAX_MEMINFO_CNT]; 2955 2956 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2957 uint64_t p = (uint64_t)start; 2958 while (p < (uint64_t)end) { 2959 addrs[0] = p; 2960 size_t addrs_count = 1; 2961 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2962 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2963 addrs_count++; 2964 } 2965 2966 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2967 return NULL; 2968 } 2969 2970 size_t i = 0; 2971 for (; i < addrs_count; i++) { 2972 if ((validity[i] & 1) != 0) { 2973 if ((validity[i] & 4) != 0) { 2974 if (outdata[types * i + 1] != page_expected->size) { 2975 break; 2976 } 2977 } else 2978 if (page_expected->size != 0) { 2979 break; 2980 } 2981 2982 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2983 if (outdata[types * i] != page_expected->lgrp_id) { 2984 break; 2985 } 2986 } 2987 } else { 2988 return NULL; 2989 } 2990 } 2991 2992 if (i != addrs_count) { 2993 if ((validity[i] & 2) != 0) { 2994 page_found->lgrp_id = outdata[types * i]; 2995 } else { 2996 page_found->lgrp_id = -1; 2997 } 2998 if ((validity[i] & 4) != 0) { 2999 page_found->size = outdata[types * i + 1]; 3000 } else { 3001 page_found->size = 0; 3002 } 3003 return (char*)addrs[i]; 3004 } 3005 3006 p = addrs[addrs_count - 1] + page_size; 3007 } 3008 return end; 3009} 3010 3011bool os::uncommit_memory(char* addr, size_t bytes) { 3012 size_t size = bytes; 3013 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3014 // uncommitted page. Otherwise, the read/write might succeed if we 3015 // have enough swap space to back the physical page. 3016 return 3017 NULL != Solaris::mmap_chunk(addr, size, 3018 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3019 PROT_NONE); 3020} 3021 3022char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3023 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3024 3025 if (b == MAP_FAILED) { 3026 return NULL; 3027 } 3028 return b; 3029} 3030 3031char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3032 char* addr = requested_addr; 3033 int flags = MAP_PRIVATE | MAP_NORESERVE; 3034 3035 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3036 3037 if (fixed) { 3038 flags |= MAP_FIXED; 3039 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3040 flags |= MAP_ALIGN; 3041 addr = (char*) alignment_hint; 3042 } 3043 3044 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3045 // uncommitted page. Otherwise, the read/write might succeed if we 3046 // have enough swap space to back the physical page. 3047 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3048} 3049 3050char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3051 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3052 3053 guarantee(requested_addr == NULL || requested_addr == addr, 3054 "OS failed to return requested mmap address."); 3055 return addr; 3056} 3057 3058// Reserve memory at an arbitrary address, only if that area is 3059// available (and not reserved for something else). 3060 3061char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3062 const int max_tries = 10; 3063 char* base[max_tries]; 3064 size_t size[max_tries]; 3065 3066 // Solaris adds a gap between mmap'ed regions. The size of the gap 3067 // is dependent on the requested size and the MMU. Our initial gap 3068 // value here is just a guess and will be corrected later. 3069 bool had_top_overlap = false; 3070 bool have_adjusted_gap = false; 3071 size_t gap = 0x400000; 3072 3073 // Assert only that the size is a multiple of the page size, since 3074 // that's all that mmap requires, and since that's all we really know 3075 // about at this low abstraction level. If we need higher alignment, 3076 // we can either pass an alignment to this method or verify alignment 3077 // in one of the methods further up the call chain. See bug 5044738. 3078 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3079 3080 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3081 // Give it a try, if the kernel honors the hint we can return immediately. 3082 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3083 volatile int err = errno; 3084 if (addr == requested_addr) { 3085 return addr; 3086 } else if (addr != NULL) { 3087 unmap_memory(addr, bytes); 3088 } 3089 3090 if (PrintMiscellaneous && Verbose) { 3091 char buf[256]; 3092 buf[0] = '\0'; 3093 if (addr == NULL) { 3094 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3095 } 3096 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3097 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3098 "%s", bytes, requested_addr, addr, buf); 3099 } 3100 3101 // Address hint method didn't work. Fall back to the old method. 3102 // In theory, once SNV becomes our oldest supported platform, this 3103 // code will no longer be needed. 3104 // 3105 // Repeatedly allocate blocks until the block is allocated at the 3106 // right spot. Give up after max_tries. 3107 int i; 3108 for (i = 0; i < max_tries; ++i) { 3109 base[i] = reserve_memory(bytes); 3110 3111 if (base[i] != NULL) { 3112 // Is this the block we wanted? 3113 if (base[i] == requested_addr) { 3114 size[i] = bytes; 3115 break; 3116 } 3117 3118 // check that the gap value is right 3119 if (had_top_overlap && !have_adjusted_gap) { 3120 size_t actual_gap = base[i-1] - base[i] - bytes; 3121 if (gap != actual_gap) { 3122 // adjust the gap value and retry the last 2 allocations 3123 assert(i > 0, "gap adjustment code problem"); 3124 have_adjusted_gap = true; // adjust the gap only once, just in case 3125 gap = actual_gap; 3126 if (PrintMiscellaneous && Verbose) { 3127 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3128 } 3129 unmap_memory(base[i], bytes); 3130 unmap_memory(base[i-1], size[i-1]); 3131 i-=2; 3132 continue; 3133 } 3134 } 3135 3136 // Does this overlap the block we wanted? Give back the overlapped 3137 // parts and try again. 3138 // 3139 // There is still a bug in this code: if top_overlap == bytes, 3140 // the overlap is offset from requested region by the value of gap. 3141 // In this case giving back the overlapped part will not work, 3142 // because we'll give back the entire block at base[i] and 3143 // therefore the subsequent allocation will not generate a new gap. 3144 // This could be fixed with a new algorithm that used larger 3145 // or variable size chunks to find the requested region - 3146 // but such a change would introduce additional complications. 3147 // It's rare enough that the planets align for this bug, 3148 // so we'll just wait for a fix for 6204603/5003415 which 3149 // will provide a mmap flag to allow us to avoid this business. 3150 3151 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3152 if (top_overlap >= 0 && top_overlap < bytes) { 3153 had_top_overlap = true; 3154 unmap_memory(base[i], top_overlap); 3155 base[i] += top_overlap; 3156 size[i] = bytes - top_overlap; 3157 } else { 3158 size_t bottom_overlap = base[i] + bytes - requested_addr; 3159 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3160 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3161 warning("attempt_reserve_memory_at: possible alignment bug"); 3162 } 3163 unmap_memory(requested_addr, bottom_overlap); 3164 size[i] = bytes - bottom_overlap; 3165 } else { 3166 size[i] = bytes; 3167 } 3168 } 3169 } 3170 } 3171 3172 // Give back the unused reserved pieces. 3173 3174 for (int j = 0; j < i; ++j) { 3175 if (base[j] != NULL) { 3176 unmap_memory(base[j], size[j]); 3177 } 3178 } 3179 3180 return (i < max_tries) ? requested_addr : NULL; 3181} 3182 3183bool os::release_memory(char* addr, size_t bytes) { 3184 size_t size = bytes; 3185 return munmap(addr, size) == 0; 3186} 3187 3188static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3189 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3190 "addr must be page aligned"); 3191 int retVal = mprotect(addr, bytes, prot); 3192 return retVal == 0; 3193} 3194 3195// Protect memory (Used to pass readonly pages through 3196// JNI GetArray<type>Elements with empty arrays.) 3197// Also, used for serialization page and for compressed oops null pointer 3198// checking. 3199bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3200 bool is_committed) { 3201 unsigned int p = 0; 3202 switch (prot) { 3203 case MEM_PROT_NONE: p = PROT_NONE; break; 3204 case MEM_PROT_READ: p = PROT_READ; break; 3205 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3206 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3207 default: 3208 ShouldNotReachHere(); 3209 } 3210 // is_committed is unused. 3211 return solaris_mprotect(addr, bytes, p); 3212} 3213 3214// guard_memory and unguard_memory only happens within stack guard pages. 3215// Since ISM pertains only to the heap, guard and unguard memory should not 3216/// happen with an ISM region. 3217bool os::guard_memory(char* addr, size_t bytes) { 3218 return solaris_mprotect(addr, bytes, PROT_NONE); 3219} 3220 3221bool os::unguard_memory(char* addr, size_t bytes) { 3222 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3223} 3224 3225// Large page support 3226 3227// UseLargePages is the master flag to enable/disable large page memory. 3228// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3229// effects can be described in the following table: 3230// 3231// UseLargePages UseMPSS UseISM 3232// false * * => UseLargePages is the master switch, turning 3233// it off will turn off both UseMPSS and 3234// UseISM. VM will not use large page memory 3235// regardless the settings of UseMPSS/UseISM. 3236// true false false => Unless future Solaris provides other 3237// mechanism to use large page memory, this 3238// combination is equivalent to -UseLargePages, 3239// VM will not use large page memory 3240// true true false => JVM will use MPSS for large page memory. 3241// This is the default behavior. 3242// true false true => JVM will use ISM for large page memory. 3243// true true true => JVM will use ISM if it is available. 3244// Otherwise, JVM will fall back to MPSS. 3245// Becaues ISM is now available on all 3246// supported Solaris versions, this combination 3247// is equivalent to +UseISM -UseMPSS. 3248 3249typedef int (*getpagesizes_func_type) (size_t[], int); 3250static size_t _large_page_size = 0; 3251 3252bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3253 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3254 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3255 // can support multiple page sizes. 3256 3257 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3258 // ISM is only recommended on old Solaris where there is no MPSS support. 3259 // Simply choose a conservative value as default. 3260 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3261 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3262 ARM_ONLY(2 * M); 3263 3264 // ISM is available on all supported Solaris versions 3265 return true; 3266} 3267 3268// Insertion sort for small arrays (descending order). 3269static void insertion_sort_descending(size_t* array, int len) { 3270 for (int i = 0; i < len; i++) { 3271 size_t val = array[i]; 3272 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3273 size_t tmp = array[key]; 3274 array[key] = array[key - 1]; 3275 array[key - 1] = tmp; 3276 } 3277 } 3278} 3279 3280bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3281 getpagesizes_func_type getpagesizes_func = 3282 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3283 if (getpagesizes_func == NULL) { 3284 if (warn) { 3285 warning("MPSS is not supported by the operating system."); 3286 } 3287 return false; 3288 } 3289 3290 const unsigned int usable_count = VM_Version::page_size_count(); 3291 if (usable_count == 1) { 3292 return false; 3293 } 3294 3295 // Fill the array of page sizes. 3296 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3297 assert(n > 0, "Solaris bug?"); 3298 if (n == page_sizes_max) { 3299 // Add a sentinel value (necessary only if the array was completely filled 3300 // since it is static (zeroed at initialization)). 3301 _page_sizes[--n] = 0; 3302 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3303 } 3304 assert(_page_sizes[n] == 0, "missing sentinel"); 3305 3306 if (n == 1) return false; // Only one page size available. 3307 3308 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3309 // select up to usable_count elements. First sort the array, find the first 3310 // acceptable value, then copy the usable sizes to the top of the array and 3311 // trim the rest. Make sure to include the default page size :-). 3312 // 3313 // A better policy could get rid of the 4M limit by taking the sizes of the 3314 // important VM memory regions (java heap and possibly the code cache) into 3315 // account. 3316 insertion_sort_descending(_page_sizes, n); 3317 const size_t size_limit = 3318 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3319 int beg; 3320 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3321 const int end = MIN2((int)usable_count, n) - 1; 3322 for (int cur = 0; cur < end; ++cur, ++beg) { 3323 _page_sizes[cur] = _page_sizes[beg]; 3324 } 3325 _page_sizes[end] = vm_page_size(); 3326 _page_sizes[end + 1] = 0; 3327 3328 if (_page_sizes[end] > _page_sizes[end - 1]) { 3329 // Default page size is not the smallest; sort again. 3330 insertion_sort_descending(_page_sizes, end + 1); 3331 } 3332 *page_size = _page_sizes[0]; 3333 3334 return true; 3335} 3336 3337bool os::large_page_init() { 3338 if (!UseLargePages) { 3339 UseISM = false; 3340 UseMPSS = false; 3341 return false; 3342 } 3343 3344 // print a warning if any large page related flag is specified on command line 3345 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3346 !FLAG_IS_DEFAULT(UseISM) || 3347 !FLAG_IS_DEFAULT(UseMPSS) || 3348 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3349 UseISM = UseISM && 3350 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3351 if (UseISM) { 3352 // ISM disables MPSS to be compatible with old JDK behavior 3353 UseMPSS = false; 3354 _page_sizes[0] = _large_page_size; 3355 _page_sizes[1] = vm_page_size(); 3356 } 3357 3358 UseMPSS = UseMPSS && 3359 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3360 3361 UseLargePages = UseISM || UseMPSS; 3362 return UseLargePages; 3363} 3364 3365bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3366 // Signal to OS that we want large pages for addresses 3367 // from addr, addr + bytes 3368 struct memcntl_mha mpss_struct; 3369 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3370 mpss_struct.mha_pagesize = align; 3371 mpss_struct.mha_flags = 0; 3372 if (memcntl(start, bytes, MC_HAT_ADVISE, 3373 (caddr_t) &mpss_struct, 0, 0) < 0) { 3374 debug_only(warning("Attempt to use MPSS failed.")); 3375 return false; 3376 } 3377 return true; 3378} 3379 3380char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 3381 // "exec" is passed in but not used. Creating the shared image for 3382 // the code cache doesn't have an SHM_X executable permission to check. 3383 assert(UseLargePages && UseISM, "only for ISM large pages"); 3384 3385 size_t size = bytes; 3386 char* retAddr = NULL; 3387 int shmid; 3388 key_t ismKey; 3389 3390 bool warn_on_failure = UseISM && 3391 (!FLAG_IS_DEFAULT(UseLargePages) || 3392 !FLAG_IS_DEFAULT(UseISM) || 3393 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3394 ); 3395 char msg[128]; 3396 3397 ismKey = IPC_PRIVATE; 3398 3399 // Create a large shared memory region to attach to based on size. 3400 // Currently, size is the total size of the heap 3401 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3402 if (shmid == -1){ 3403 if (warn_on_failure) { 3404 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3405 warning(msg); 3406 } 3407 return NULL; 3408 } 3409 3410 // Attach to the region 3411 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3412 int err = errno; 3413 3414 // Remove shmid. If shmat() is successful, the actual shared memory segment 3415 // will be deleted when it's detached by shmdt() or when the process 3416 // terminates. If shmat() is not successful this will remove the shared 3417 // segment immediately. 3418 shmctl(shmid, IPC_RMID, NULL); 3419 3420 if (retAddr == (char *) -1) { 3421 if (warn_on_failure) { 3422 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3423 warning(msg); 3424 } 3425 return NULL; 3426 } 3427 3428 return retAddr; 3429} 3430 3431bool os::release_memory_special(char* base, size_t bytes) { 3432 // detaching the SHM segment will also delete it, see reserve_memory_special() 3433 int rslt = shmdt(base); 3434 return rslt == 0; 3435} 3436 3437size_t os::large_page_size() { 3438 return _large_page_size; 3439} 3440 3441// MPSS allows application to commit large page memory on demand; with ISM 3442// the entire memory region must be allocated as shared memory. 3443bool os::can_commit_large_page_memory() { 3444 return UseISM ? false : true; 3445} 3446 3447bool os::can_execute_large_page_memory() { 3448 return UseISM ? false : true; 3449} 3450 3451static int os_sleep(jlong millis, bool interruptible) { 3452 const jlong limit = INT_MAX; 3453 jlong prevtime; 3454 int res; 3455 3456 while (millis > limit) { 3457 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3458 return res; 3459 millis -= limit; 3460 } 3461 3462 // Restart interrupted polls with new parameters until the proper delay 3463 // has been completed. 3464 3465 prevtime = getTimeMillis(); 3466 3467 while (millis > 0) { 3468 jlong newtime; 3469 3470 if (!interruptible) { 3471 // Following assert fails for os::yield_all: 3472 // assert(!thread->is_Java_thread(), "must not be java thread"); 3473 res = poll(NULL, 0, millis); 3474 } else { 3475 JavaThread *jt = JavaThread::current(); 3476 3477 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3478 os::Solaris::clear_interrupted); 3479 } 3480 3481 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3482 // thread.Interrupt. 3483 3484 // See c/r 6751923. Poll can return 0 before time 3485 // has elapsed if time is set via clock_settime (as NTP does). 3486 // res == 0 if poll timed out (see man poll RETURN VALUES) 3487 // using the logic below checks that we really did 3488 // sleep at least "millis" if not we'll sleep again. 3489 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3490 newtime = getTimeMillis(); 3491 assert(newtime >= prevtime, "time moving backwards"); 3492 /* Doing prevtime and newtime in microseconds doesn't help precision, 3493 and trying to round up to avoid lost milliseconds can result in a 3494 too-short delay. */ 3495 millis -= newtime - prevtime; 3496 if(millis <= 0) 3497 return OS_OK; 3498 prevtime = newtime; 3499 } else 3500 return res; 3501 } 3502 3503 return OS_OK; 3504} 3505 3506// Read calls from inside the vm need to perform state transitions 3507size_t os::read(int fd, void *buf, unsigned int nBytes) { 3508 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3509} 3510 3511size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3512 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3513} 3514 3515int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3516 assert(thread == Thread::current(), "thread consistency check"); 3517 3518 // TODO-FIXME: this should be removed. 3519 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3520 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3521 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3522 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3523 // is fooled into believing that the system is making progress. In the code below we block the 3524 // the watcher thread while safepoint is in progress so that it would not appear as though the 3525 // system is making progress. 3526 if (!Solaris::T2_libthread() && 3527 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3528 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3529 // the entire safepoint, the watcher thread will line up here during the safepoint. 3530 Threads_lock->lock_without_safepoint_check(); 3531 Threads_lock->unlock(); 3532 } 3533 3534 if (thread->is_Java_thread()) { 3535 // This is a JavaThread so we honor the _thread_blocked protocol 3536 // even for sleeps of 0 milliseconds. This was originally done 3537 // as a workaround for bug 4338139. However, now we also do it 3538 // to honor the suspend-equivalent protocol. 3539 3540 JavaThread *jt = (JavaThread *) thread; 3541 ThreadBlockInVM tbivm(jt); 3542 3543 jt->set_suspend_equivalent(); 3544 // cleared by handle_special_suspend_equivalent_condition() or 3545 // java_suspend_self() via check_and_wait_while_suspended() 3546 3547 int ret_code; 3548 if (millis <= 0) { 3549 thr_yield(); 3550 ret_code = 0; 3551 } else { 3552 // The original sleep() implementation did not create an 3553 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3554 // I'm preserving that decision for now. 3555 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3556 3557 ret_code = os_sleep(millis, interruptible); 3558 } 3559 3560 // were we externally suspended while we were waiting? 3561 jt->check_and_wait_while_suspended(); 3562 3563 return ret_code; 3564 } 3565 3566 // non-JavaThread from this point on: 3567 3568 if (millis <= 0) { 3569 thr_yield(); 3570 return 0; 3571 } 3572 3573 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3574 3575 return os_sleep(millis, interruptible); 3576} 3577 3578int os::naked_sleep() { 3579 // %% make the sleep time an integer flag. for now use 1 millisec. 3580 return os_sleep(1, false); 3581} 3582 3583// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3584void os::infinite_sleep() { 3585 while (true) { // sleep forever ... 3586 ::sleep(100); // ... 100 seconds at a time 3587 } 3588} 3589 3590// Used to convert frequent JVM_Yield() to nops 3591bool os::dont_yield() { 3592 if (DontYieldALot) { 3593 static hrtime_t last_time = 0; 3594 hrtime_t diff = getTimeNanos() - last_time; 3595 3596 if (diff < DontYieldALotInterval * 1000000) 3597 return true; 3598 3599 last_time += diff; 3600 3601 return false; 3602 } 3603 else { 3604 return false; 3605 } 3606} 3607 3608// Caveat: Solaris os::yield() causes a thread-state transition whereas 3609// the linux and win32 implementations do not. This should be checked. 3610 3611void os::yield() { 3612 // Yields to all threads with same or greater priority 3613 os::sleep(Thread::current(), 0, false); 3614} 3615 3616// Note that yield semantics are defined by the scheduling class to which 3617// the thread currently belongs. Typically, yield will _not yield to 3618// other equal or higher priority threads that reside on the dispatch queues 3619// of other CPUs. 3620 3621os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3622 3623 3624// On Solaris we found that yield_all doesn't always yield to all other threads. 3625// There have been cases where there is a thread ready to execute but it doesn't 3626// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3627// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3628// SIGWAITING signal which will cause a new lwp to be created. So we count the 3629// number of times yield_all is called in the one loop and increase the sleep 3630// time after 8 attempts. If this fails too we increase the concurrency level 3631// so that the starving thread would get an lwp 3632 3633void os::yield_all(int attempts) { 3634 // Yields to all threads, including threads with lower priorities 3635 if (attempts == 0) { 3636 os::sleep(Thread::current(), 1, false); 3637 } else { 3638 int iterations = attempts % 30; 3639 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3640 // thr_setconcurrency and _getconcurrency make sense only under T1. 3641 int noofLWPS = thr_getconcurrency(); 3642 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3643 thr_setconcurrency(thr_getconcurrency() + 1); 3644 } 3645 } else if (iterations < 25) { 3646 os::sleep(Thread::current(), 1, false); 3647 } else { 3648 os::sleep(Thread::current(), 10, false); 3649 } 3650 } 3651} 3652 3653// Called from the tight loops to possibly influence time-sharing heuristics 3654void os::loop_breaker(int attempts) { 3655 os::yield_all(attempts); 3656} 3657 3658 3659// Interface for setting lwp priorities. If we are using T2 libthread, 3660// which forces the use of BoundThreads or we manually set UseBoundThreads, 3661// all of our threads will be assigned to real lwp's. Using the thr_setprio 3662// function is meaningless in this mode so we must adjust the real lwp's priority 3663// The routines below implement the getting and setting of lwp priorities. 3664// 3665// Note: There are three priority scales used on Solaris. Java priotities 3666// which range from 1 to 10, libthread "thr_setprio" scale which range 3667// from 0 to 127, and the current scheduling class of the process we 3668// are running in. This is typically from -60 to +60. 3669// The setting of the lwp priorities in done after a call to thr_setprio 3670// so Java priorities are mapped to libthread priorities and we map from 3671// the latter to lwp priorities. We don't keep priorities stored in 3672// Java priorities since some of our worker threads want to set priorities 3673// higher than all Java threads. 3674// 3675// For related information: 3676// (1) man -s 2 priocntl 3677// (2) man -s 4 priocntl 3678// (3) man dispadmin 3679// = librt.so 3680// = libthread/common/rtsched.c - thrp_setlwpprio(). 3681// = ps -cL <pid> ... to validate priority. 3682// = sched_get_priority_min and _max 3683// pthread_create 3684// sched_setparam 3685// pthread_setschedparam 3686// 3687// Assumptions: 3688// + We assume that all threads in the process belong to the same 3689// scheduling class. IE. an homogenous process. 3690// + Must be root or in IA group to change change "interactive" attribute. 3691// Priocntl() will fail silently. The only indication of failure is when 3692// we read-back the value and notice that it hasn't changed. 3693// + Interactive threads enter the runq at the head, non-interactive at the tail. 3694// + For RT, change timeslice as well. Invariant: 3695// constant "priority integral" 3696// Konst == TimeSlice * (60-Priority) 3697// Given a priority, compute appropriate timeslice. 3698// + Higher numerical values have higher priority. 3699 3700// sched class attributes 3701typedef struct { 3702 int schedPolicy; // classID 3703 int maxPrio; 3704 int minPrio; 3705} SchedInfo; 3706 3707 3708static SchedInfo tsLimits, iaLimits, rtLimits; 3709 3710#ifdef ASSERT 3711static int ReadBackValidate = 1; 3712#endif 3713static int myClass = 0; 3714static int myMin = 0; 3715static int myMax = 0; 3716static int myCur = 0; 3717static bool priocntl_enable = false; 3718 3719 3720// Call the version of priocntl suitable for all supported versions 3721// of Solaris. We need to call through this wrapper so that we can 3722// build on Solaris 9 and run on Solaris 8, 9 and 10. 3723// 3724// This code should be removed if we ever stop supporting Solaris 8 3725// and earlier releases. 3726 3727static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3728typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3729static priocntl_type priocntl_ptr = priocntl_stub; 3730 3731// Stub to set the value of the real pointer, and then call the real 3732// function. 3733 3734static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3735 // Try Solaris 8- name only. 3736 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3737 guarantee(tmp != NULL, "priocntl function not found."); 3738 priocntl_ptr = tmp; 3739 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3740} 3741 3742 3743// lwp_priocntl_init 3744// 3745// Try to determine the priority scale for our process. 3746// 3747// Return errno or 0 if OK. 3748// 3749static 3750int lwp_priocntl_init () 3751{ 3752 int rslt; 3753 pcinfo_t ClassInfo; 3754 pcparms_t ParmInfo; 3755 int i; 3756 3757 if (!UseThreadPriorities) return 0; 3758 3759 // We are using Bound threads, we need to determine our priority ranges 3760 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3761 // If ThreadPriorityPolicy is 1, switch tables 3762 if (ThreadPriorityPolicy == 1) { 3763 for (i = 0 ; i < MaxPriority+1; i++) 3764 os::java_to_os_priority[i] = prio_policy1[i]; 3765 } 3766 } 3767 // Not using Bound Threads, set to ThreadPolicy 1 3768 else { 3769 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3770 os::java_to_os_priority[i] = prio_policy1[i]; 3771 } 3772 return 0; 3773 } 3774 3775 3776 // Get IDs for a set of well-known scheduling classes. 3777 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3778 // the system. We should have a loop that iterates over the 3779 // classID values, which are known to be "small" integers. 3780 3781 strcpy(ClassInfo.pc_clname, "TS"); 3782 ClassInfo.pc_cid = -1; 3783 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3784 if (rslt < 0) return errno; 3785 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3786 tsLimits.schedPolicy = ClassInfo.pc_cid; 3787 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3788 tsLimits.minPrio = -tsLimits.maxPrio; 3789 3790 strcpy(ClassInfo.pc_clname, "IA"); 3791 ClassInfo.pc_cid = -1; 3792 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3793 if (rslt < 0) return errno; 3794 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3795 iaLimits.schedPolicy = ClassInfo.pc_cid; 3796 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3797 iaLimits.minPrio = -iaLimits.maxPrio; 3798 3799 strcpy(ClassInfo.pc_clname, "RT"); 3800 ClassInfo.pc_cid = -1; 3801 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3802 if (rslt < 0) return errno; 3803 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3804 rtLimits.schedPolicy = ClassInfo.pc_cid; 3805 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3806 rtLimits.minPrio = 0; 3807 3808 3809 // Query our "current" scheduling class. 3810 // This will normally be IA,TS or, rarely, RT. 3811 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3812 ParmInfo.pc_cid = PC_CLNULL; 3813 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3814 if ( rslt < 0 ) return errno; 3815 myClass = ParmInfo.pc_cid; 3816 3817 // We now know our scheduling classId, get specific information 3818 // the class. 3819 ClassInfo.pc_cid = myClass; 3820 ClassInfo.pc_clname[0] = 0; 3821 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3822 if ( rslt < 0 ) return errno; 3823 3824 if (ThreadPriorityVerbose) 3825 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3826 3827 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3828 ParmInfo.pc_cid = PC_CLNULL; 3829 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3830 if (rslt < 0) return errno; 3831 3832 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3833 myMin = rtLimits.minPrio; 3834 myMax = rtLimits.maxPrio; 3835 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3836 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3837 myMin = iaLimits.minPrio; 3838 myMax = iaLimits.maxPrio; 3839 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3840 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3841 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3842 myMin = tsLimits.minPrio; 3843 myMax = tsLimits.maxPrio; 3844 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3845 } else { 3846 // No clue - punt 3847 if (ThreadPriorityVerbose) 3848 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3849 return EINVAL; // no clue, punt 3850 } 3851 3852 if (ThreadPriorityVerbose) 3853 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3854 3855 priocntl_enable = true; // Enable changing priorities 3856 return 0; 3857} 3858 3859#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3860#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3861#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3862 3863 3864// scale_to_lwp_priority 3865// 3866// Convert from the libthread "thr_setprio" scale to our current 3867// lwp scheduling class scale. 3868// 3869static 3870int scale_to_lwp_priority (int rMin, int rMax, int x) 3871{ 3872 int v; 3873 3874 if (x == 127) return rMax; // avoid round-down 3875 v = (((x*(rMax-rMin)))/128)+rMin; 3876 return v; 3877} 3878 3879 3880// set_lwp_priority 3881// 3882// Set the priority of the lwp. This call should only be made 3883// when using bound threads (T2 threads are bound by default). 3884// 3885int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3886{ 3887 int rslt; 3888 int Actual, Expected, prv; 3889 pcparms_t ParmInfo; // for GET-SET 3890#ifdef ASSERT 3891 pcparms_t ReadBack; // for readback 3892#endif 3893 3894 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3895 // Query current values. 3896 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3897 // Cache "pcparms_t" in global ParmCache. 3898 // TODO: elide set-to-same-value 3899 3900 // If something went wrong on init, don't change priorities. 3901 if ( !priocntl_enable ) { 3902 if (ThreadPriorityVerbose) 3903 tty->print_cr("Trying to set priority but init failed, ignoring"); 3904 return EINVAL; 3905 } 3906 3907 3908 // If lwp hasn't started yet, just return 3909 // the _start routine will call us again. 3910 if ( lwpid <= 0 ) { 3911 if (ThreadPriorityVerbose) { 3912 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3913 ThreadID, newPrio); 3914 } 3915 return 0; 3916 } 3917 3918 if (ThreadPriorityVerbose) { 3919 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3920 ThreadID, lwpid, newPrio); 3921 } 3922 3923 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3924 ParmInfo.pc_cid = PC_CLNULL; 3925 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3926 if (rslt < 0) return errno; 3927 3928 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3929 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3930 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3931 rtInfo->rt_tqsecs = RT_NOCHANGE; 3932 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3933 if (ThreadPriorityVerbose) { 3934 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3935 } 3936 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3937 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3938 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3939 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3940 iaInfo->ia_uprilim = IA_NOCHANGE; 3941 iaInfo->ia_mode = IA_NOCHANGE; 3942 if (ThreadPriorityVerbose) { 3943 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3944 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3945 } 3946 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3947 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3948 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3949 prv = tsInfo->ts_upri; 3950 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3951 tsInfo->ts_uprilim = IA_NOCHANGE; 3952 if (ThreadPriorityVerbose) { 3953 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3954 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3955 } 3956 if (prv == tsInfo->ts_upri) return 0; 3957 } else { 3958 if ( ThreadPriorityVerbose ) { 3959 tty->print_cr ("Unknown scheduling class\n"); 3960 } 3961 return EINVAL; // no clue, punt 3962 } 3963 3964 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3965 if (ThreadPriorityVerbose && rslt) { 3966 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3967 } 3968 if (rslt < 0) return errno; 3969 3970#ifdef ASSERT 3971 // Sanity check: read back what we just attempted to set. 3972 // In theory it could have changed in the interim ... 3973 // 3974 // The priocntl system call is tricky. 3975 // Sometimes it'll validate the priority value argument and 3976 // return EINVAL if unhappy. At other times it fails silently. 3977 // Readbacks are prudent. 3978 3979 if (!ReadBackValidate) return 0; 3980 3981 memset(&ReadBack, 0, sizeof(pcparms_t)); 3982 ReadBack.pc_cid = PC_CLNULL; 3983 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3984 assert(rslt >= 0, "priocntl failed"); 3985 Actual = Expected = 0xBAD; 3986 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3987 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3988 Actual = RTPRI(ReadBack)->rt_pri; 3989 Expected = RTPRI(ParmInfo)->rt_pri; 3990 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3991 Actual = IAPRI(ReadBack)->ia_upri; 3992 Expected = IAPRI(ParmInfo)->ia_upri; 3993 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3994 Actual = TSPRI(ReadBack)->ts_upri; 3995 Expected = TSPRI(ParmInfo)->ts_upri; 3996 } else { 3997 if ( ThreadPriorityVerbose ) { 3998 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3999 } 4000 } 4001 4002 if (Actual != Expected) { 4003 if ( ThreadPriorityVerbose ) { 4004 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4005 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4006 } 4007 } 4008#endif 4009 4010 return 0; 4011} 4012 4013 4014 4015// Solaris only gives access to 128 real priorities at a time, 4016// so we expand Java's ten to fill this range. This would be better 4017// if we dynamically adjusted relative priorities. 4018// 4019// The ThreadPriorityPolicy option allows us to select 2 different 4020// priority scales. 4021// 4022// ThreadPriorityPolicy=0 4023// Since the Solaris' default priority is MaximumPriority, we do not 4024// set a priority lower than Max unless a priority lower than 4025// NormPriority is requested. 4026// 4027// ThreadPriorityPolicy=1 4028// This mode causes the priority table to get filled with 4029// linear values. NormPriority get's mapped to 50% of the 4030// Maximum priority an so on. This will cause VM threads 4031// to get unfair treatment against other Solaris processes 4032// which do not explicitly alter their thread priorities. 4033// 4034 4035 4036int os::java_to_os_priority[MaxPriority + 1] = { 4037 -99999, // 0 Entry should never be used 4038 4039 0, // 1 MinPriority 4040 32, // 2 4041 64, // 3 4042 4043 96, // 4 4044 127, // 5 NormPriority 4045 127, // 6 4046 4047 127, // 7 4048 127, // 8 4049 127, // 9 NearMaxPriority 4050 4051 127 // 10 MaxPriority 4052}; 4053 4054 4055OSReturn os::set_native_priority(Thread* thread, int newpri) { 4056 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4057 if ( !UseThreadPriorities ) return OS_OK; 4058 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 4059 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 4060 status |= (set_lwp_priority (thread->osthread()->thread_id(), 4061 thread->osthread()->lwp_id(), newpri )); 4062 return (status == 0) ? OS_OK : OS_ERR; 4063} 4064 4065 4066OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4067 int p; 4068 if ( !UseThreadPriorities ) { 4069 *priority_ptr = NormalPriority; 4070 return OS_OK; 4071 } 4072 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4073 if (status != 0) { 4074 return OS_ERR; 4075 } 4076 *priority_ptr = p; 4077 return OS_OK; 4078} 4079 4080 4081// Hint to the underlying OS that a task switch would not be good. 4082// Void return because it's a hint and can fail. 4083void os::hint_no_preempt() { 4084 schedctl_start(schedctl_init()); 4085} 4086 4087void os::interrupt(Thread* thread) { 4088 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4089 4090 OSThread* osthread = thread->osthread(); 4091 4092 int isInterrupted = osthread->interrupted(); 4093 if (!isInterrupted) { 4094 osthread->set_interrupted(true); 4095 OrderAccess::fence(); 4096 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4097 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4098 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4099 ParkEvent * const slp = thread->_SleepEvent ; 4100 if (slp != NULL) slp->unpark() ; 4101 } 4102 4103 // For JSR166: unpark after setting status but before thr_kill -dl 4104 if (thread->is_Java_thread()) { 4105 ((JavaThread*)thread)->parker()->unpark(); 4106 } 4107 4108 // Handle interruptible wait() ... 4109 ParkEvent * const ev = thread->_ParkEvent ; 4110 if (ev != NULL) ev->unpark() ; 4111 4112 // When events are used everywhere for os::sleep, then this thr_kill 4113 // will only be needed if UseVMInterruptibleIO is true. 4114 4115 if (!isInterrupted) { 4116 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4117 assert_status(status == 0, status, "thr_kill"); 4118 4119 // Bump thread interruption counter 4120 RuntimeService::record_thread_interrupt_signaled_count(); 4121 } 4122} 4123 4124 4125bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4126 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4127 4128 OSThread* osthread = thread->osthread(); 4129 4130 bool res = osthread->interrupted(); 4131 4132 // NOTE that since there is no "lock" around these two operations, 4133 // there is the possibility that the interrupted flag will be 4134 // "false" but that the interrupt event will be set. This is 4135 // intentional. The effect of this is that Object.wait() will appear 4136 // to have a spurious wakeup, which is not harmful, and the 4137 // possibility is so rare that it is not worth the added complexity 4138 // to add yet another lock. It has also been recommended not to put 4139 // the interrupted flag into the os::Solaris::Event structure, 4140 // because it hides the issue. 4141 if (res && clear_interrupted) { 4142 osthread->set_interrupted(false); 4143 } 4144 return res; 4145} 4146 4147 4148void os::print_statistics() { 4149} 4150 4151int os::message_box(const char* title, const char* message) { 4152 int i; 4153 fdStream err(defaultStream::error_fd()); 4154 for (i = 0; i < 78; i++) err.print_raw("="); 4155 err.cr(); 4156 err.print_raw_cr(title); 4157 for (i = 0; i < 78; i++) err.print_raw("-"); 4158 err.cr(); 4159 err.print_raw_cr(message); 4160 for (i = 0; i < 78; i++) err.print_raw("="); 4161 err.cr(); 4162 4163 char buf[16]; 4164 // Prevent process from exiting upon "read error" without consuming all CPU 4165 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4166 4167 return buf[0] == 'y' || buf[0] == 'Y'; 4168} 4169 4170// A lightweight implementation that does not suspend the target thread and 4171// thus returns only a hint. Used for profiling only! 4172ExtendedPC os::get_thread_pc(Thread* thread) { 4173 // Make sure that it is called by the watcher and the Threads lock is owned. 4174 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4175 // For now, is only used to profile the VM Thread 4176 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4177 ExtendedPC epc; 4178 4179 GetThreadPC_Callback cb(ProfileVM_lock); 4180 OSThread *osthread = thread->osthread(); 4181 const int time_to_wait = 400; // 400ms wait for initial response 4182 int status = cb.interrupt(thread, time_to_wait); 4183 4184 if (cb.is_done() ) { 4185 epc = cb.addr(); 4186 } else { 4187 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4188 osthread->thread_id(), status);); 4189 // epc is already NULL 4190 } 4191 return epc; 4192} 4193 4194 4195// This does not do anything on Solaris. This is basically a hook for being 4196// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4197void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4198 f(value, method, args, thread); 4199} 4200 4201// This routine may be used by user applications as a "hook" to catch signals. 4202// The user-defined signal handler must pass unrecognized signals to this 4203// routine, and if it returns true (non-zero), then the signal handler must 4204// return immediately. If the flag "abort_if_unrecognized" is true, then this 4205// routine will never retun false (zero), but instead will execute a VM panic 4206// routine kill the process. 4207// 4208// If this routine returns false, it is OK to call it again. This allows 4209// the user-defined signal handler to perform checks either before or after 4210// the VM performs its own checks. Naturally, the user code would be making 4211// a serious error if it tried to handle an exception (such as a null check 4212// or breakpoint) that the VM was generating for its own correct operation. 4213// 4214// This routine may recognize any of the following kinds of signals: 4215// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4216// os::Solaris::SIGasync 4217// It should be consulted by handlers for any of those signals. 4218// It explicitly does not recognize os::Solaris::SIGinterrupt 4219// 4220// The caller of this routine must pass in the three arguments supplied 4221// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4222// field of the structure passed to sigaction(). This routine assumes that 4223// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4224// 4225// Note that the VM will print warnings if it detects conflicting signal 4226// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4227// 4228extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4229 4230 4231void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4232 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4233} 4234 4235/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4236 is needed to provoke threads blocked on IO to return an EINTR 4237 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4238 does NOT participate in signal chaining due to requirement for 4239 NOT setting SA_RESTART to make EINTR work. */ 4240extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4241 if (UseSignalChaining) { 4242 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4243 if (actp && actp->sa_handler) { 4244 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4245 } 4246 } 4247} 4248 4249// This boolean allows users to forward their own non-matching signals 4250// to JVM_handle_solaris_signal, harmlessly. 4251bool os::Solaris::signal_handlers_are_installed = false; 4252 4253// For signal-chaining 4254bool os::Solaris::libjsig_is_loaded = false; 4255typedef struct sigaction *(*get_signal_t)(int); 4256get_signal_t os::Solaris::get_signal_action = NULL; 4257 4258struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4259 struct sigaction *actp = NULL; 4260 4261 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4262 // Retrieve the old signal handler from libjsig 4263 actp = (*get_signal_action)(sig); 4264 } 4265 if (actp == NULL) { 4266 // Retrieve the preinstalled signal handler from jvm 4267 actp = get_preinstalled_handler(sig); 4268 } 4269 4270 return actp; 4271} 4272 4273static bool call_chained_handler(struct sigaction *actp, int sig, 4274 siginfo_t *siginfo, void *context) { 4275 // Call the old signal handler 4276 if (actp->sa_handler == SIG_DFL) { 4277 // It's more reasonable to let jvm treat it as an unexpected exception 4278 // instead of taking the default action. 4279 return false; 4280 } else if (actp->sa_handler != SIG_IGN) { 4281 if ((actp->sa_flags & SA_NODEFER) == 0) { 4282 // automaticlly block the signal 4283 sigaddset(&(actp->sa_mask), sig); 4284 } 4285 4286 sa_handler_t hand; 4287 sa_sigaction_t sa; 4288 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4289 // retrieve the chained handler 4290 if (siginfo_flag_set) { 4291 sa = actp->sa_sigaction; 4292 } else { 4293 hand = actp->sa_handler; 4294 } 4295 4296 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4297 actp->sa_handler = SIG_DFL; 4298 } 4299 4300 // try to honor the signal mask 4301 sigset_t oset; 4302 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4303 4304 // call into the chained handler 4305 if (siginfo_flag_set) { 4306 (*sa)(sig, siginfo, context); 4307 } else { 4308 (*hand)(sig); 4309 } 4310 4311 // restore the signal mask 4312 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4313 } 4314 // Tell jvm's signal handler the signal is taken care of. 4315 return true; 4316} 4317 4318bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4319 bool chained = false; 4320 // signal-chaining 4321 if (UseSignalChaining) { 4322 struct sigaction *actp = get_chained_signal_action(sig); 4323 if (actp != NULL) { 4324 chained = call_chained_handler(actp, sig, siginfo, context); 4325 } 4326 } 4327 return chained; 4328} 4329 4330struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4331 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4332 if (preinstalled_sigs[sig] != 0) { 4333 return &chainedsigactions[sig]; 4334 } 4335 return NULL; 4336} 4337 4338void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4339 4340 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4341 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4342 chainedsigactions[sig] = oldAct; 4343 preinstalled_sigs[sig] = 1; 4344} 4345 4346void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4347 // Check for overwrite. 4348 struct sigaction oldAct; 4349 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4350 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4351 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4352 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4353 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4354 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4355 if (AllowUserSignalHandlers || !set_installed) { 4356 // Do not overwrite; user takes responsibility to forward to us. 4357 return; 4358 } else if (UseSignalChaining) { 4359 if (oktochain) { 4360 // save the old handler in jvm 4361 save_preinstalled_handler(sig, oldAct); 4362 } else { 4363 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4364 } 4365 // libjsig also interposes the sigaction() call below and saves the 4366 // old sigaction on it own. 4367 } else { 4368 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4369 "%#lx for signal %d.", (long)oldhand, sig)); 4370 } 4371 } 4372 4373 struct sigaction sigAct; 4374 sigfillset(&(sigAct.sa_mask)); 4375 sigAct.sa_handler = SIG_DFL; 4376 4377 sigAct.sa_sigaction = signalHandler; 4378 // Handle SIGSEGV on alternate signal stack if 4379 // not using stack banging 4380 if (!UseStackBanging && sig == SIGSEGV) { 4381 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4382 // Interruptible i/o requires SA_RESTART cleared so EINTR 4383 // is returned instead of restarting system calls 4384 } else if (sig == os::Solaris::SIGinterrupt()) { 4385 sigemptyset(&sigAct.sa_mask); 4386 sigAct.sa_handler = NULL; 4387 sigAct.sa_flags = SA_SIGINFO; 4388 sigAct.sa_sigaction = sigINTRHandler; 4389 } else { 4390 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4391 } 4392 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4393 4394 sigaction(sig, &sigAct, &oldAct); 4395 4396 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4397 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4398 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4399} 4400 4401 4402#define DO_SIGNAL_CHECK(sig) \ 4403 if (!sigismember(&check_signal_done, sig)) \ 4404 os::Solaris::check_signal_handler(sig) 4405 4406// This method is a periodic task to check for misbehaving JNI applications 4407// under CheckJNI, we can add any periodic checks here 4408 4409void os::run_periodic_checks() { 4410 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4411 // thereby preventing a NULL checks. 4412 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4413 4414 if (check_signals == false) return; 4415 4416 // SEGV and BUS if overridden could potentially prevent 4417 // generation of hs*.log in the event of a crash, debugging 4418 // such a case can be very challenging, so we absolutely 4419 // check for the following for a good measure: 4420 DO_SIGNAL_CHECK(SIGSEGV); 4421 DO_SIGNAL_CHECK(SIGILL); 4422 DO_SIGNAL_CHECK(SIGFPE); 4423 DO_SIGNAL_CHECK(SIGBUS); 4424 DO_SIGNAL_CHECK(SIGPIPE); 4425 DO_SIGNAL_CHECK(SIGXFSZ); 4426 4427 // ReduceSignalUsage allows the user to override these handlers 4428 // see comments at the very top and jvm_solaris.h 4429 if (!ReduceSignalUsage) { 4430 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4431 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4432 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4433 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4434 } 4435 4436 // See comments above for using JVM1/JVM2 and UseAltSigs 4437 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4438 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4439 4440} 4441 4442typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4443 4444static os_sigaction_t os_sigaction = NULL; 4445 4446void os::Solaris::check_signal_handler(int sig) { 4447 char buf[O_BUFLEN]; 4448 address jvmHandler = NULL; 4449 4450 struct sigaction act; 4451 if (os_sigaction == NULL) { 4452 // only trust the default sigaction, in case it has been interposed 4453 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4454 if (os_sigaction == NULL) return; 4455 } 4456 4457 os_sigaction(sig, (struct sigaction*)NULL, &act); 4458 4459 address thisHandler = (act.sa_flags & SA_SIGINFO) 4460 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4461 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4462 4463 4464 switch(sig) { 4465 case SIGSEGV: 4466 case SIGBUS: 4467 case SIGFPE: 4468 case SIGPIPE: 4469 case SIGXFSZ: 4470 case SIGILL: 4471 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4472 break; 4473 4474 case SHUTDOWN1_SIGNAL: 4475 case SHUTDOWN2_SIGNAL: 4476 case SHUTDOWN3_SIGNAL: 4477 case BREAK_SIGNAL: 4478 jvmHandler = (address)user_handler(); 4479 break; 4480 4481 default: 4482 int intrsig = os::Solaris::SIGinterrupt(); 4483 int asynsig = os::Solaris::SIGasync(); 4484 4485 if (sig == intrsig) { 4486 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4487 } else if (sig == asynsig) { 4488 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4489 } else { 4490 return; 4491 } 4492 break; 4493 } 4494 4495 4496 if (thisHandler != jvmHandler) { 4497 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4498 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4499 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4500 // No need to check this sig any longer 4501 sigaddset(&check_signal_done, sig); 4502 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4503 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4504 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4505 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4506 // No need to check this sig any longer 4507 sigaddset(&check_signal_done, sig); 4508 } 4509 4510 // Print all the signal handler state 4511 if (sigismember(&check_signal_done, sig)) { 4512 print_signal_handlers(tty, buf, O_BUFLEN); 4513 } 4514 4515} 4516 4517void os::Solaris::install_signal_handlers() { 4518 bool libjsigdone = false; 4519 signal_handlers_are_installed = true; 4520 4521 // signal-chaining 4522 typedef void (*signal_setting_t)(); 4523 signal_setting_t begin_signal_setting = NULL; 4524 signal_setting_t end_signal_setting = NULL; 4525 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4526 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4527 if (begin_signal_setting != NULL) { 4528 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4529 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4530 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4531 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4532 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4533 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4534 libjsig_is_loaded = true; 4535 if (os::Solaris::get_libjsig_version != NULL) { 4536 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4537 } 4538 assert(UseSignalChaining, "should enable signal-chaining"); 4539 } 4540 if (libjsig_is_loaded) { 4541 // Tell libjsig jvm is setting signal handlers 4542 (*begin_signal_setting)(); 4543 } 4544 4545 set_signal_handler(SIGSEGV, true, true); 4546 set_signal_handler(SIGPIPE, true, true); 4547 set_signal_handler(SIGXFSZ, true, true); 4548 set_signal_handler(SIGBUS, true, true); 4549 set_signal_handler(SIGILL, true, true); 4550 set_signal_handler(SIGFPE, true, true); 4551 4552 4553 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4554 4555 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4556 // can not register overridable signals which might be > 32 4557 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4558 // Tell libjsig jvm has finished setting signal handlers 4559 (*end_signal_setting)(); 4560 libjsigdone = true; 4561 } 4562 } 4563 4564 // Never ok to chain our SIGinterrupt 4565 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4566 set_signal_handler(os::Solaris::SIGasync(), true, true); 4567 4568 if (libjsig_is_loaded && !libjsigdone) { 4569 // Tell libjsig jvm finishes setting signal handlers 4570 (*end_signal_setting)(); 4571 } 4572 4573 // We don't activate signal checker if libjsig is in place, we trust ourselves 4574 // and if UserSignalHandler is installed all bets are off 4575 if (CheckJNICalls) { 4576 if (libjsig_is_loaded) { 4577 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4578 check_signals = false; 4579 } 4580 if (AllowUserSignalHandlers) { 4581 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4582 check_signals = false; 4583 } 4584 } 4585} 4586 4587 4588void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4589 4590const char * signames[] = { 4591 "SIG0", 4592 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4593 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4594 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4595 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4596 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4597 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4598 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4599 "SIGCANCEL", "SIGLOST" 4600}; 4601 4602const char* os::exception_name(int exception_code, char* buf, size_t size) { 4603 if (0 < exception_code && exception_code <= SIGRTMAX) { 4604 // signal 4605 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4606 jio_snprintf(buf, size, "%s", signames[exception_code]); 4607 } else { 4608 jio_snprintf(buf, size, "SIG%d", exception_code); 4609 } 4610 return buf; 4611 } else { 4612 return NULL; 4613 } 4614} 4615 4616// (Static) wrappers for the new libthread API 4617int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4618int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4619int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4620int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4621int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4622 4623// (Static) wrapper for getisax(2) call. 4624os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4625 4626// (Static) wrappers for the liblgrp API 4627os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4628os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4629os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4630os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4631os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4632os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4633os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4634os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4635os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4636 4637// (Static) wrapper for meminfo() call. 4638os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4639 4640static address resolve_symbol_lazy(const char* name) { 4641 address addr = (address) dlsym(RTLD_DEFAULT, name); 4642 if(addr == NULL) { 4643 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4644 addr = (address) dlsym(RTLD_NEXT, name); 4645 } 4646 return addr; 4647} 4648 4649static address resolve_symbol(const char* name) { 4650 address addr = resolve_symbol_lazy(name); 4651 if(addr == NULL) { 4652 fatal(dlerror()); 4653 } 4654 return addr; 4655} 4656 4657 4658 4659// isT2_libthread() 4660// 4661// Routine to determine if we are currently using the new T2 libthread. 4662// 4663// We determine if we are using T2 by reading /proc/self/lstatus and 4664// looking for a thread with the ASLWP bit set. If we find this status 4665// bit set, we must assume that we are NOT using T2. The T2 team 4666// has approved this algorithm. 4667// 4668// We need to determine if we are running with the new T2 libthread 4669// since setting native thread priorities is handled differently 4670// when using this library. All threads created using T2 are bound 4671// threads. Calling thr_setprio is meaningless in this case. 4672// 4673bool isT2_libthread() { 4674 static prheader_t * lwpArray = NULL; 4675 static int lwpSize = 0; 4676 static int lwpFile = -1; 4677 lwpstatus_t * that; 4678 char lwpName [128]; 4679 bool isT2 = false; 4680 4681#define ADR(x) ((uintptr_t)(x)) 4682#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4683 4684 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4685 if (lwpFile < 0) { 4686 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4687 return false; 4688 } 4689 lwpSize = 16*1024; 4690 for (;;) { 4691 ::lseek64 (lwpFile, 0, SEEK_SET); 4692 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4693 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4694 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4695 break; 4696 } 4697 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4698 // We got a good snapshot - now iterate over the list. 4699 int aslwpcount = 0; 4700 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4701 that = LWPINDEX(lwpArray,i); 4702 if (that->pr_flags & PR_ASLWP) { 4703 aslwpcount++; 4704 } 4705 } 4706 if (aslwpcount == 0) isT2 = true; 4707 break; 4708 } 4709 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4710 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4711 } 4712 4713 FREE_C_HEAP_ARRAY(char, lwpArray); 4714 ::close (lwpFile); 4715 if (ThreadPriorityVerbose) { 4716 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4717 else tty->print_cr("We are not running with a T2 libthread\n"); 4718 } 4719 return isT2; 4720} 4721 4722 4723void os::Solaris::libthread_init() { 4724 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4725 4726 // Determine if we are running with the new T2 libthread 4727 os::Solaris::set_T2_libthread(isT2_libthread()); 4728 4729 lwp_priocntl_init(); 4730 4731 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4732 if(func == NULL) { 4733 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4734 // Guarantee that this VM is running on an new enough OS (5.6 or 4735 // later) that it will have a new enough libthread.so. 4736 guarantee(func != NULL, "libthread.so is too old."); 4737 } 4738 4739 // Initialize the new libthread getstate API wrappers 4740 func = resolve_symbol("thr_getstate"); 4741 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4742 4743 func = resolve_symbol("thr_setstate"); 4744 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4745 4746 func = resolve_symbol("thr_setmutator"); 4747 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4748 4749 func = resolve_symbol("thr_suspend_mutator"); 4750 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4751 4752 func = resolve_symbol("thr_continue_mutator"); 4753 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4754 4755 int size; 4756 void (*handler_info_func)(address *, int *); 4757 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4758 handler_info_func(&handler_start, &size); 4759 handler_end = handler_start + size; 4760} 4761 4762 4763int_fnP_mutex_tP os::Solaris::_mutex_lock; 4764int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4765int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4766int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4767int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4768int os::Solaris::_mutex_scope = USYNC_THREAD; 4769 4770int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4771int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4772int_fnP_cond_tP os::Solaris::_cond_signal; 4773int_fnP_cond_tP os::Solaris::_cond_broadcast; 4774int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4775int_fnP_cond_tP os::Solaris::_cond_destroy; 4776int os::Solaris::_cond_scope = USYNC_THREAD; 4777 4778void os::Solaris::synchronization_init() { 4779 if(UseLWPSynchronization) { 4780 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4781 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4782 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4783 os::Solaris::set_mutex_init(lwp_mutex_init); 4784 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4785 os::Solaris::set_mutex_scope(USYNC_THREAD); 4786 4787 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4788 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4789 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4790 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4791 os::Solaris::set_cond_init(lwp_cond_init); 4792 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4793 os::Solaris::set_cond_scope(USYNC_THREAD); 4794 } 4795 else { 4796 os::Solaris::set_mutex_scope(USYNC_THREAD); 4797 os::Solaris::set_cond_scope(USYNC_THREAD); 4798 4799 if(UsePthreads) { 4800 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4801 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4802 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4803 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4804 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4805 4806 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4807 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4808 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4809 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4810 os::Solaris::set_cond_init(pthread_cond_default_init); 4811 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4812 } 4813 else { 4814 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4815 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4816 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4817 os::Solaris::set_mutex_init(::mutex_init); 4818 os::Solaris::set_mutex_destroy(::mutex_destroy); 4819 4820 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4821 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4822 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4823 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4824 os::Solaris::set_cond_init(::cond_init); 4825 os::Solaris::set_cond_destroy(::cond_destroy); 4826 } 4827 } 4828} 4829 4830bool os::Solaris::liblgrp_init() { 4831 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4832 if (handle != NULL) { 4833 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4834 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4835 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4836 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4837 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4838 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4839 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4840 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4841 dlsym(handle, "lgrp_cookie_stale"))); 4842 4843 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4844 set_lgrp_cookie(c); 4845 return true; 4846 } 4847 return false; 4848} 4849 4850void os::Solaris::misc_sym_init() { 4851 address func; 4852 4853 // getisax 4854 func = resolve_symbol_lazy("getisax"); 4855 if (func != NULL) { 4856 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4857 } 4858 4859 // meminfo 4860 func = resolve_symbol_lazy("meminfo"); 4861 if (func != NULL) { 4862 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4863 } 4864} 4865 4866uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4867 assert(_getisax != NULL, "_getisax not set"); 4868 return _getisax(array, n); 4869} 4870 4871// Symbol doesn't exist in Solaris 8 pset.h 4872#ifndef PS_MYID 4873#define PS_MYID -3 4874#endif 4875 4876// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4877typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4878static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4879 4880void init_pset_getloadavg_ptr(void) { 4881 pset_getloadavg_ptr = 4882 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4883 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4884 warning("pset_getloadavg function not found"); 4885 } 4886} 4887 4888int os::Solaris::_dev_zero_fd = -1; 4889 4890// this is called _before_ the global arguments have been parsed 4891void os::init(void) { 4892 _initial_pid = getpid(); 4893 4894 max_hrtime = first_hrtime = gethrtime(); 4895 4896 init_random(1234567); 4897 4898 page_size = sysconf(_SC_PAGESIZE); 4899 if (page_size == -1) 4900 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4901 strerror(errno))); 4902 init_page_sizes((size_t) page_size); 4903 4904 Solaris::initialize_system_info(); 4905 4906 // Initialize misc. symbols as soon as possible, so we can use them 4907 // if we need them. 4908 Solaris::misc_sym_init(); 4909 4910 int fd = ::open("/dev/zero", O_RDWR); 4911 if (fd < 0) { 4912 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4913 } else { 4914 Solaris::set_dev_zero_fd(fd); 4915 4916 // Close on exec, child won't inherit. 4917 fcntl(fd, F_SETFD, FD_CLOEXEC); 4918 } 4919 4920 clock_tics_per_sec = CLK_TCK; 4921 4922 // check if dladdr1() exists; dladdr1 can provide more information than 4923 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4924 // and is available on linker patches for 5.7 and 5.8. 4925 // libdl.so must have been loaded, this call is just an entry lookup 4926 void * hdl = dlopen("libdl.so", RTLD_NOW); 4927 if (hdl) 4928 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4929 4930 // (Solaris only) this switches to calls that actually do locking. 4931 ThreadCritical::initialize(); 4932 4933 main_thread = thr_self(); 4934 4935 // Constant minimum stack size allowed. It must be at least 4936 // the minimum of what the OS supports (thr_min_stack()), and 4937 // enough to allow the thread to get to user bytecode execution. 4938 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4939 // If the pagesize of the VM is greater than 8K determine the appropriate 4940 // number of initial guard pages. The user can change this with the 4941 // command line arguments, if needed. 4942 if (vm_page_size() > 8*K) { 4943 StackYellowPages = 1; 4944 StackRedPages = 1; 4945 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4946 } 4947} 4948 4949// To install functions for atexit system call 4950extern "C" { 4951 static void perfMemory_exit_helper() { 4952 perfMemory_exit(); 4953 } 4954} 4955 4956// this is called _after_ the global arguments have been parsed 4957jint os::init_2(void) { 4958 // try to enable extended file IO ASAP, see 6431278 4959 os::Solaris::try_enable_extended_io(); 4960 4961 // Allocate a single page and mark it as readable for safepoint polling. Also 4962 // use this first mmap call to check support for MAP_ALIGN. 4963 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4964 page_size, 4965 MAP_PRIVATE | MAP_ALIGN, 4966 PROT_READ); 4967 if (polling_page == NULL) { 4968 has_map_align = false; 4969 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4970 PROT_READ); 4971 } 4972 4973 os::set_polling_page(polling_page); 4974 4975#ifndef PRODUCT 4976 if( Verbose && PrintMiscellaneous ) 4977 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4978#endif 4979 4980 if (!UseMembar) { 4981 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4982 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4983 os::set_memory_serialize_page( mem_serialize_page ); 4984 4985#ifndef PRODUCT 4986 if(Verbose && PrintMiscellaneous) 4987 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4988#endif 4989} 4990 4991 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4992 4993 // Check minimum allowable stack size for thread creation and to initialize 4994 // the java system classes, including StackOverflowError - depends on page 4995 // size. Add a page for compiler2 recursion in main thread. 4996 // Add in 2*BytesPerWord times page size to account for VM stack during 4997 // class initialization depending on 32 or 64 bit VM. 4998 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4999 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5000 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5001 5002 size_t threadStackSizeInBytes = ThreadStackSize * K; 5003 if (threadStackSizeInBytes != 0 && 5004 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5005 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5006 os::Solaris::min_stack_allowed/K); 5007 return JNI_ERR; 5008 } 5009 5010 // For 64kbps there will be a 64kb page size, which makes 5011 // the usable default stack size quite a bit less. Increase the 5012 // stack for 64kb (or any > than 8kb) pages, this increases 5013 // virtual memory fragmentation (since we're not creating the 5014 // stack on a power of 2 boundary. The real fix for this 5015 // should be to fix the guard page mechanism. 5016 5017 if (vm_page_size() > 8*K) { 5018 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5019 ? threadStackSizeInBytes + 5020 ((StackYellowPages + StackRedPages) * vm_page_size()) 5021 : 0; 5022 ThreadStackSize = threadStackSizeInBytes/K; 5023 } 5024 5025 // Make the stack size a multiple of the page size so that 5026 // the yellow/red zones can be guarded. 5027 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5028 vm_page_size())); 5029 5030 Solaris::libthread_init(); 5031 5032 if (UseNUMA) { 5033 if (!Solaris::liblgrp_init()) { 5034 UseNUMA = false; 5035 } else { 5036 size_t lgrp_limit = os::numa_get_groups_num(); 5037 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); 5038 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5039 FREE_C_HEAP_ARRAY(int, lgrp_ids); 5040 if (lgrp_num < 2) { 5041 // There's only one locality group, disable NUMA. 5042 UseNUMA = false; 5043 } 5044 } 5045 if (!UseNUMA && ForceNUMA) { 5046 UseNUMA = true; 5047 } 5048 } 5049 5050 Solaris::signal_sets_init(); 5051 Solaris::init_signal_mem(); 5052 Solaris::install_signal_handlers(); 5053 5054 if (libjsigversion < JSIG_VERSION_1_4_1) { 5055 Maxlibjsigsigs = OLDMAXSIGNUM; 5056 } 5057 5058 // initialize synchronization primitives to use either thread or 5059 // lwp synchronization (controlled by UseLWPSynchronization) 5060 Solaris::synchronization_init(); 5061 5062 if (MaxFDLimit) { 5063 // set the number of file descriptors to max. print out error 5064 // if getrlimit/setrlimit fails but continue regardless. 5065 struct rlimit nbr_files; 5066 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5067 if (status != 0) { 5068 if (PrintMiscellaneous && (Verbose || WizardMode)) 5069 perror("os::init_2 getrlimit failed"); 5070 } else { 5071 nbr_files.rlim_cur = nbr_files.rlim_max; 5072 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5073 if (status != 0) { 5074 if (PrintMiscellaneous && (Verbose || WizardMode)) 5075 perror("os::init_2 setrlimit failed"); 5076 } 5077 } 5078 } 5079 5080 // Calculate theoretical max. size of Threads to guard gainst 5081 // artifical out-of-memory situations, where all available address- 5082 // space has been reserved by thread stacks. Default stack size is 1Mb. 5083 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5084 JavaThread::stack_size_at_create() : (1*K*K); 5085 assert(pre_thread_stack_size != 0, "Must have a stack"); 5086 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5087 // we should start doing Virtual Memory banging. Currently when the threads will 5088 // have used all but 200Mb of space. 5089 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5090 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5091 5092 // at-exit methods are called in the reverse order of their registration. 5093 // In Solaris 7 and earlier, atexit functions are called on return from 5094 // main or as a result of a call to exit(3C). There can be only 32 of 5095 // these functions registered and atexit() does not set errno. In Solaris 5096 // 8 and later, there is no limit to the number of functions registered 5097 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5098 // functions are called upon dlclose(3DL) in addition to return from main 5099 // and exit(3C). 5100 5101 if (PerfAllowAtExitRegistration) { 5102 // only register atexit functions if PerfAllowAtExitRegistration is set. 5103 // atexit functions can be delayed until process exit time, which 5104 // can be problematic for embedded VM situations. Embedded VMs should 5105 // call DestroyJavaVM() to assure that VM resources are released. 5106 5107 // note: perfMemory_exit_helper atexit function may be removed in 5108 // the future if the appropriate cleanup code can be added to the 5109 // VM_Exit VMOperation's doit method. 5110 if (atexit(perfMemory_exit_helper) != 0) { 5111 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5112 } 5113 } 5114 5115 // Init pset_loadavg function pointer 5116 init_pset_getloadavg_ptr(); 5117 5118 return JNI_OK; 5119} 5120 5121void os::init_3(void) { 5122 return; 5123} 5124 5125// Mark the polling page as unreadable 5126void os::make_polling_page_unreadable(void) { 5127 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5128 fatal("Could not disable polling page"); 5129}; 5130 5131// Mark the polling page as readable 5132void os::make_polling_page_readable(void) { 5133 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5134 fatal("Could not enable polling page"); 5135}; 5136 5137// OS interface. 5138 5139bool os::check_heap(bool force) { return true; } 5140 5141typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5142static vsnprintf_t sol_vsnprintf = NULL; 5143 5144int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5145 if (!sol_vsnprintf) { 5146 //search for the named symbol in the objects that were loaded after libjvm 5147 void* where = RTLD_NEXT; 5148 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5149 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5150 if (!sol_vsnprintf){ 5151 //search for the named symbol in the objects that were loaded before libjvm 5152 where = RTLD_DEFAULT; 5153 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5154 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5155 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5156 } 5157 } 5158 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5159} 5160 5161 5162// Is a (classpath) directory empty? 5163bool os::dir_is_empty(const char* path) { 5164 DIR *dir = NULL; 5165 struct dirent *ptr; 5166 5167 dir = opendir(path); 5168 if (dir == NULL) return true; 5169 5170 /* Scan the directory */ 5171 bool result = true; 5172 char buf[sizeof(struct dirent) + MAX_PATH]; 5173 struct dirent *dbuf = (struct dirent *) buf; 5174 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5175 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5176 result = false; 5177 } 5178 } 5179 closedir(dir); 5180 return result; 5181} 5182 5183// This code originates from JDK's sysOpen and open64_w 5184// from src/solaris/hpi/src/system_md.c 5185 5186#ifndef O_DELETE 5187#define O_DELETE 0x10000 5188#endif 5189 5190// Open a file. Unlink the file immediately after open returns 5191// if the specified oflag has the O_DELETE flag set. 5192// O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5193 5194int os::open(const char *path, int oflag, int mode) { 5195 if (strlen(path) > MAX_PATH - 1) { 5196 errno = ENAMETOOLONG; 5197 return -1; 5198 } 5199 int fd; 5200 int o_delete = (oflag & O_DELETE); 5201 oflag = oflag & ~O_DELETE; 5202 5203 fd = ::open64(path, oflag, mode); 5204 if (fd == -1) return -1; 5205 5206 //If the open succeeded, the file might still be a directory 5207 { 5208 struct stat64 buf64; 5209 int ret = ::fstat64(fd, &buf64); 5210 int st_mode = buf64.st_mode; 5211 5212 if (ret != -1) { 5213 if ((st_mode & S_IFMT) == S_IFDIR) { 5214 errno = EISDIR; 5215 ::close(fd); 5216 return -1; 5217 } 5218 } else { 5219 ::close(fd); 5220 return -1; 5221 } 5222 } 5223 /* 5224 * 32-bit Solaris systems suffer from: 5225 * 5226 * - an historical default soft limit of 256 per-process file 5227 * descriptors that is too low for many Java programs. 5228 * 5229 * - a design flaw where file descriptors created using stdio 5230 * fopen must be less than 256, _even_ when the first limit above 5231 * has been raised. This can cause calls to fopen (but not calls to 5232 * open, for example) to fail mysteriously, perhaps in 3rd party 5233 * native code (although the JDK itself uses fopen). One can hardly 5234 * criticize them for using this most standard of all functions. 5235 * 5236 * We attempt to make everything work anyways by: 5237 * 5238 * - raising the soft limit on per-process file descriptors beyond 5239 * 256 5240 * 5241 * - As of Solaris 10u4, we can request that Solaris raise the 256 5242 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5243 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5244 * 5245 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5246 * workaround the bug by remapping non-stdio file descriptors below 5247 * 256 to ones beyond 256, which is done below. 5248 * 5249 * See: 5250 * 1085341: 32-bit stdio routines should support file descriptors >255 5251 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5252 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5253 * enable_extended_FILE_stdio() in VM initialisation 5254 * Giri Mandalika's blog 5255 * http://technopark02.blogspot.com/2005_05_01_archive.html 5256 */ 5257#ifndef _LP64 5258 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5259 int newfd = ::fcntl(fd, F_DUPFD, 256); 5260 if (newfd != -1) { 5261 ::close(fd); 5262 fd = newfd; 5263 } 5264 } 5265#endif // 32-bit Solaris 5266 /* 5267 * All file descriptors that are opened in the JVM and not 5268 * specifically destined for a subprocess should have the 5269 * close-on-exec flag set. If we don't set it, then careless 3rd 5270 * party native code might fork and exec without closing all 5271 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5272 * UNIXProcess.c), and this in turn might: 5273 * 5274 * - cause end-of-file to fail to be detected on some file 5275 * descriptors, resulting in mysterious hangs, or 5276 * 5277 * - might cause an fopen in the subprocess to fail on a system 5278 * suffering from bug 1085341. 5279 * 5280 * (Yes, the default setting of the close-on-exec flag is a Unix 5281 * design flaw) 5282 * 5283 * See: 5284 * 1085341: 32-bit stdio routines should support file descriptors >255 5285 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5286 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5287 */ 5288#ifdef FD_CLOEXEC 5289 { 5290 int flags = ::fcntl(fd, F_GETFD); 5291 if (flags != -1) 5292 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5293 } 5294#endif 5295 5296 if (o_delete != 0) { 5297 ::unlink(path); 5298 } 5299 return fd; 5300} 5301 5302// create binary file, rewriting existing file if required 5303int os::create_binary_file(const char* path, bool rewrite_existing) { 5304 int oflags = O_WRONLY | O_CREAT; 5305 if (!rewrite_existing) { 5306 oflags |= O_EXCL; 5307 } 5308 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5309} 5310 5311// return current position of file pointer 5312jlong os::current_file_offset(int fd) { 5313 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5314} 5315 5316// move file pointer to the specified offset 5317jlong os::seek_to_file_offset(int fd, jlong offset) { 5318 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5319} 5320 5321jlong os::lseek(int fd, jlong offset, int whence) { 5322 return (jlong) ::lseek64(fd, offset, whence); 5323} 5324 5325char * os::native_path(char *path) { 5326 return path; 5327} 5328 5329int os::ftruncate(int fd, jlong length) { 5330 return ::ftruncate64(fd, length); 5331} 5332 5333int os::fsync(int fd) { 5334 RESTARTABLE_RETURN_INT(::fsync(fd)); 5335} 5336 5337int os::available(int fd, jlong *bytes) { 5338 jlong cur, end; 5339 int mode; 5340 struct stat64 buf64; 5341 5342 if (::fstat64(fd, &buf64) >= 0) { 5343 mode = buf64.st_mode; 5344 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5345 /* 5346 * XXX: is the following call interruptible? If so, this might 5347 * need to go through the INTERRUPT_IO() wrapper as for other 5348 * blocking, interruptible calls in this file. 5349 */ 5350 int n,ioctl_return; 5351 5352 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5353 if (ioctl_return>= 0) { 5354 *bytes = n; 5355 return 1; 5356 } 5357 } 5358 } 5359 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5360 return 0; 5361 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5362 return 0; 5363 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5364 return 0; 5365 } 5366 *bytes = end - cur; 5367 return 1; 5368} 5369 5370// Map a block of memory. 5371char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5372 char *addr, size_t bytes, bool read_only, 5373 bool allow_exec) { 5374 int prot; 5375 int flags; 5376 5377 if (read_only) { 5378 prot = PROT_READ; 5379 flags = MAP_SHARED; 5380 } else { 5381 prot = PROT_READ | PROT_WRITE; 5382 flags = MAP_PRIVATE; 5383 } 5384 5385 if (allow_exec) { 5386 prot |= PROT_EXEC; 5387 } 5388 5389 if (addr != NULL) { 5390 flags |= MAP_FIXED; 5391 } 5392 5393 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5394 fd, file_offset); 5395 if (mapped_address == MAP_FAILED) { 5396 return NULL; 5397 } 5398 return mapped_address; 5399} 5400 5401 5402// Remap a block of memory. 5403char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5404 char *addr, size_t bytes, bool read_only, 5405 bool allow_exec) { 5406 // same as map_memory() on this OS 5407 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5408 allow_exec); 5409} 5410 5411 5412// Unmap a block of memory. 5413bool os::unmap_memory(char* addr, size_t bytes) { 5414 return munmap(addr, bytes) == 0; 5415} 5416 5417void os::pause() { 5418 char filename[MAX_PATH]; 5419 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5420 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5421 } else { 5422 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5423 } 5424 5425 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5426 if (fd != -1) { 5427 struct stat buf; 5428 ::close(fd); 5429 while (::stat(filename, &buf) == 0) { 5430 (void)::poll(NULL, 0, 100); 5431 } 5432 } else { 5433 jio_fprintf(stderr, 5434 "Could not open pause file '%s', continuing immediately.\n", filename); 5435 } 5436} 5437 5438#ifndef PRODUCT 5439#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5440// Turn this on if you need to trace synch operations. 5441// Set RECORD_SYNCH_LIMIT to a large-enough value, 5442// and call record_synch_enable and record_synch_disable 5443// around the computation of interest. 5444 5445void record_synch(char* name, bool returning); // defined below 5446 5447class RecordSynch { 5448 char* _name; 5449 public: 5450 RecordSynch(char* name) :_name(name) 5451 { record_synch(_name, false); } 5452 ~RecordSynch() { record_synch(_name, true); } 5453}; 5454 5455#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5456extern "C" ret name params { \ 5457 typedef ret name##_t params; \ 5458 static name##_t* implem = NULL; \ 5459 static int callcount = 0; \ 5460 if (implem == NULL) { \ 5461 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5462 if (implem == NULL) fatal(dlerror()); \ 5463 } \ 5464 ++callcount; \ 5465 RecordSynch _rs(#name); \ 5466 inner; \ 5467 return implem args; \ 5468} 5469// in dbx, examine callcounts this way: 5470// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5471 5472#define CHECK_POINTER_OK(p) \ 5473 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5474#define CHECK_MU \ 5475 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5476#define CHECK_CV \ 5477 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5478#define CHECK_P(p) \ 5479 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5480 5481#define CHECK_MUTEX(mutex_op) \ 5482CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5483 5484CHECK_MUTEX( mutex_lock) 5485CHECK_MUTEX( _mutex_lock) 5486CHECK_MUTEX( mutex_unlock) 5487CHECK_MUTEX(_mutex_unlock) 5488CHECK_MUTEX( mutex_trylock) 5489CHECK_MUTEX(_mutex_trylock) 5490 5491#define CHECK_COND(cond_op) \ 5492CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5493 5494CHECK_COND( cond_wait); 5495CHECK_COND(_cond_wait); 5496CHECK_COND(_cond_wait_cancel); 5497 5498#define CHECK_COND2(cond_op) \ 5499CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5500 5501CHECK_COND2( cond_timedwait); 5502CHECK_COND2(_cond_timedwait); 5503CHECK_COND2(_cond_timedwait_cancel); 5504 5505// do the _lwp_* versions too 5506#define mutex_t lwp_mutex_t 5507#define cond_t lwp_cond_t 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) 5513CHECK_MUTEX( __lwp_mutex_trylock) 5514CHECK_MUTEX(___lwp_mutex_lock) 5515CHECK_MUTEX(___lwp_mutex_unlock) 5516 5517CHECK_COND( _lwp_cond_wait); 5518CHECK_COND( __lwp_cond_wait); 5519CHECK_COND(___lwp_cond_wait); 5520 5521CHECK_COND2( _lwp_cond_timedwait); 5522CHECK_COND2( __lwp_cond_timedwait); 5523#undef mutex_t 5524#undef cond_t 5525 5526CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5527CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5528CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5529CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5530CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5531CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5532CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5533CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5534 5535 5536// recording machinery: 5537 5538enum { RECORD_SYNCH_LIMIT = 200 }; 5539char* record_synch_name[RECORD_SYNCH_LIMIT]; 5540void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5541bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5542thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5543int record_synch_count = 0; 5544bool record_synch_enabled = false; 5545 5546// in dbx, examine recorded data this way: 5547// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5548 5549void record_synch(char* name, bool returning) { 5550 if (record_synch_enabled) { 5551 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5552 record_synch_name[record_synch_count] = name; 5553 record_synch_returning[record_synch_count] = returning; 5554 record_synch_thread[record_synch_count] = thr_self(); 5555 record_synch_arg0ptr[record_synch_count] = &name; 5556 record_synch_count++; 5557 } 5558 // put more checking code here: 5559 // ... 5560 } 5561} 5562 5563void record_synch_enable() { 5564 // start collecting trace data, if not already doing so 5565 if (!record_synch_enabled) record_synch_count = 0; 5566 record_synch_enabled = true; 5567} 5568 5569void record_synch_disable() { 5570 // stop collecting trace data 5571 record_synch_enabled = false; 5572} 5573 5574#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5575#endif // PRODUCT 5576 5577const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5578const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5579 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5580 5581 5582// JVMTI & JVM monitoring and management support 5583// The thread_cpu_time() and current_thread_cpu_time() are only 5584// supported if is_thread_cpu_time_supported() returns true. 5585// They are not supported on Solaris T1. 5586 5587// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5588// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5589// of a thread. 5590// 5591// current_thread_cpu_time() and thread_cpu_time(Thread *) 5592// returns the fast estimate available on the platform. 5593 5594// hrtime_t gethrvtime() return value includes 5595// user time but does not include system time 5596jlong os::current_thread_cpu_time() { 5597 return (jlong) gethrvtime(); 5598} 5599 5600jlong os::thread_cpu_time(Thread *thread) { 5601 // return user level CPU time only to be consistent with 5602 // what current_thread_cpu_time returns. 5603 // thread_cpu_time_info() must be changed if this changes 5604 return os::thread_cpu_time(thread, false /* user time only */); 5605} 5606 5607jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5608 if (user_sys_cpu_time) { 5609 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5610 } else { 5611 return os::current_thread_cpu_time(); 5612 } 5613} 5614 5615jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5616 char proc_name[64]; 5617 int count; 5618 prusage_t prusage; 5619 jlong lwp_time; 5620 int fd; 5621 5622 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5623 getpid(), 5624 thread->osthread()->lwp_id()); 5625 fd = ::open(proc_name, O_RDONLY); 5626 if ( fd == -1 ) return -1; 5627 5628 do { 5629 count = ::pread(fd, 5630 (void *)&prusage.pr_utime, 5631 thr_time_size, 5632 thr_time_off); 5633 } while (count < 0 && errno == EINTR); 5634 ::close(fd); 5635 if ( count < 0 ) return -1; 5636 5637 if (user_sys_cpu_time) { 5638 // user + system CPU time 5639 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5640 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5641 (jlong)prusage.pr_stime.tv_nsec + 5642 (jlong)prusage.pr_utime.tv_nsec; 5643 } else { 5644 // user level CPU time only 5645 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5646 (jlong)prusage.pr_utime.tv_nsec; 5647 } 5648 5649 return(lwp_time); 5650} 5651 5652void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5653 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5654 info_ptr->may_skip_backward = false; // elapsed time not wall time 5655 info_ptr->may_skip_forward = false; // elapsed time not wall time 5656 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5657} 5658 5659void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5660 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5661 info_ptr->may_skip_backward = false; // elapsed time not wall time 5662 info_ptr->may_skip_forward = false; // elapsed time not wall time 5663 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5664} 5665 5666bool os::is_thread_cpu_time_supported() { 5667 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5668 return true; 5669 } else { 5670 return false; 5671 } 5672} 5673 5674// System loadavg support. Returns -1 if load average cannot be obtained. 5675// Return the load average for our processor set if the primitive exists 5676// (Solaris 9 and later). Otherwise just return system wide loadavg. 5677int os::loadavg(double loadavg[], int nelem) { 5678 if (pset_getloadavg_ptr != NULL) { 5679 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5680 } else { 5681 return ::getloadavg(loadavg, nelem); 5682 } 5683} 5684 5685//--------------------------------------------------------------------------------- 5686 5687static address same_page(address x, address y) { 5688 intptr_t page_bits = -os::vm_page_size(); 5689 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5690 return x; 5691 else if (x > y) 5692 return (address)(intptr_t(y) | ~page_bits) + 1; 5693 else 5694 return (address)(intptr_t(y) & page_bits); 5695} 5696 5697bool os::find(address addr, outputStream* st) { 5698 Dl_info dlinfo; 5699 memset(&dlinfo, 0, sizeof(dlinfo)); 5700 if (dladdr(addr, &dlinfo)) { 5701#ifdef _LP64 5702 st->print("0x%016lx: ", addr); 5703#else 5704 st->print("0x%08x: ", addr); 5705#endif 5706 if (dlinfo.dli_sname != NULL) 5707 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5708 else if (dlinfo.dli_fname) 5709 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5710 else 5711 st->print("<absolute address>"); 5712 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5713#ifdef _LP64 5714 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5715#else 5716 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5717#endif 5718 st->cr(); 5719 5720 if (Verbose) { 5721 // decode some bytes around the PC 5722 address begin = same_page(addr-40, addr); 5723 address end = same_page(addr+40, addr); 5724 address lowest = (address) dlinfo.dli_sname; 5725 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5726 if (begin < lowest) begin = lowest; 5727 Dl_info dlinfo2; 5728 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5729 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5730 end = (address) dlinfo2.dli_saddr; 5731 Disassembler::decode(begin, end, st); 5732 } 5733 return true; 5734 } 5735 return false; 5736} 5737 5738// Following function has been added to support HotSparc's libjvm.so running 5739// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5740// src/solaris/hpi/native_threads in the EVM codebase. 5741// 5742// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5743// libraries and should thus be removed. We will leave it behind for a while 5744// until we no longer want to able to run on top of 1.3.0 Solaris production 5745// JDK. See 4341971. 5746 5747#define STACK_SLACK 0x800 5748 5749extern "C" { 5750 intptr_t sysThreadAvailableStackWithSlack() { 5751 stack_t st; 5752 intptr_t retval, stack_top; 5753 retval = thr_stksegment(&st); 5754 assert(retval == 0, "incorrect return value from thr_stksegment"); 5755 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5756 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5757 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5758 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5759 } 5760} 5761 5762// Just to get the Kernel build to link on solaris for testing. 5763 5764extern "C" { 5765class ASGCT_CallTrace; 5766void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5767 KERNEL_RETURN; 5768} 5769 5770 5771// ObjectMonitor park-unpark infrastructure ... 5772// 5773// We implement Solaris and Linux PlatformEvents with the 5774// obvious condvar-mutex-flag triple. 5775// Another alternative that works quite well is pipes: 5776// Each PlatformEvent consists of a pipe-pair. 5777// The thread associated with the PlatformEvent 5778// calls park(), which reads from the input end of the pipe. 5779// Unpark() writes into the other end of the pipe. 5780// The write-side of the pipe must be set NDELAY. 5781// Unfortunately pipes consume a large # of handles. 5782// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5783// Using pipes for the 1st few threads might be workable, however. 5784// 5785// park() is permitted to return spuriously. 5786// Callers of park() should wrap the call to park() in 5787// an appropriate loop. A litmus test for the correct 5788// usage of park is the following: if park() were modified 5789// to immediately return 0 your code should still work, 5790// albeit degenerating to a spin loop. 5791// 5792// An interesting optimization for park() is to use a trylock() 5793// to attempt to acquire the mutex. If the trylock() fails 5794// then we know that a concurrent unpark() operation is in-progress. 5795// in that case the park() code could simply set _count to 0 5796// and return immediately. The subsequent park() operation *might* 5797// return immediately. That's harmless as the caller of park() is 5798// expected to loop. By using trylock() we will have avoided a 5799// avoided a context switch caused by contention on the per-thread mutex. 5800// 5801// TODO-FIXME: 5802// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5803// objectmonitor implementation. 5804// 2. Collapse the JSR166 parker event, and the 5805// objectmonitor ParkEvent into a single "Event" construct. 5806// 3. In park() and unpark() add: 5807// assert (Thread::current() == AssociatedWith). 5808// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5809// 1-out-of-N park() operations will return immediately. 5810// 5811// _Event transitions in park() 5812// -1 => -1 : illegal 5813// 1 => 0 : pass - return immediately 5814// 0 => -1 : block 5815// 5816// _Event serves as a restricted-range semaphore. 5817// 5818// Another possible encoding of _Event would be with 5819// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5820// 5821// TODO-FIXME: add DTRACE probes for: 5822// 1. Tx parks 5823// 2. Ty unparks Tx 5824// 3. Tx resumes from park 5825 5826 5827// value determined through experimentation 5828#define ROUNDINGFIX 11 5829 5830// utility to compute the abstime argument to timedwait. 5831// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5832 5833static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5834 // millis is the relative timeout time 5835 // abstime will be the absolute timeout time 5836 if (millis < 0) millis = 0; 5837 struct timeval now; 5838 int status = gettimeofday(&now, NULL); 5839 assert(status == 0, "gettimeofday"); 5840 jlong seconds = millis / 1000; 5841 jlong max_wait_period; 5842 5843 if (UseLWPSynchronization) { 5844 // forward port of fix for 4275818 (not sleeping long enough) 5845 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5846 // _lwp_cond_timedwait() used a round_down algorithm rather 5847 // than a round_up. For millis less than our roundfactor 5848 // it rounded down to 0 which doesn't meet the spec. 5849 // For millis > roundfactor we may return a bit sooner, but 5850 // since we can not accurately identify the patch level and 5851 // this has already been fixed in Solaris 9 and 8 we will 5852 // leave it alone rather than always rounding down. 5853 5854 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5855 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5856 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5857 max_wait_period = 21000000; 5858 } else { 5859 max_wait_period = 50000000; 5860 } 5861 millis %= 1000; 5862 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5863 seconds = max_wait_period; 5864 } 5865 abstime->tv_sec = now.tv_sec + seconds; 5866 long usec = now.tv_usec + millis * 1000; 5867 if (usec >= 1000000) { 5868 abstime->tv_sec += 1; 5869 usec -= 1000000; 5870 } 5871 abstime->tv_nsec = usec * 1000; 5872 return abstime; 5873} 5874 5875// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5876// Conceptually TryPark() should be equivalent to park(0). 5877 5878int os::PlatformEvent::TryPark() { 5879 for (;;) { 5880 const int v = _Event ; 5881 guarantee ((v == 0) || (v == 1), "invariant") ; 5882 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5883 } 5884} 5885 5886void os::PlatformEvent::park() { // AKA: down() 5887 // Invariant: Only the thread associated with the Event/PlatformEvent 5888 // may call park(). 5889 int v ; 5890 for (;;) { 5891 v = _Event ; 5892 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5893 } 5894 guarantee (v >= 0, "invariant") ; 5895 if (v == 0) { 5896 // Do this the hard way by blocking ... 5897 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5898 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5899 // Only for SPARC >= V8PlusA 5900#if defined(__sparc) && defined(COMPILER2) 5901 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5902#endif 5903 int status = os::Solaris::mutex_lock(_mutex); 5904 assert_status(status == 0, status, "mutex_lock"); 5905 guarantee (_nParked == 0, "invariant") ; 5906 ++ _nParked ; 5907 while (_Event < 0) { 5908 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5909 // Treat this the same as if the wait was interrupted 5910 // With usr/lib/lwp going to kernel, always handle ETIME 5911 status = os::Solaris::cond_wait(_cond, _mutex); 5912 if (status == ETIME) status = EINTR ; 5913 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5914 } 5915 -- _nParked ; 5916 _Event = 0 ; 5917 status = os::Solaris::mutex_unlock(_mutex); 5918 assert_status(status == 0, status, "mutex_unlock"); 5919 } 5920} 5921 5922int os::PlatformEvent::park(jlong millis) { 5923 guarantee (_nParked == 0, "invariant") ; 5924 int v ; 5925 for (;;) { 5926 v = _Event ; 5927 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5928 } 5929 guarantee (v >= 0, "invariant") ; 5930 if (v != 0) return OS_OK ; 5931 5932 int ret = OS_TIMEOUT; 5933 timestruc_t abst; 5934 compute_abstime (&abst, millis); 5935 5936 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5937 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5938 // Only for SPARC >= V8PlusA 5939#if defined(__sparc) && defined(COMPILER2) 5940 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5941#endif 5942 int status = os::Solaris::mutex_lock(_mutex); 5943 assert_status(status == 0, status, "mutex_lock"); 5944 guarantee (_nParked == 0, "invariant") ; 5945 ++ _nParked ; 5946 while (_Event < 0) { 5947 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5948 assert_status(status == 0 || status == EINTR || 5949 status == ETIME || status == ETIMEDOUT, 5950 status, "cond_timedwait"); 5951 if (!FilterSpuriousWakeups) break ; // previous semantics 5952 if (status == ETIME || status == ETIMEDOUT) break ; 5953 // We consume and ignore EINTR and spurious wakeups. 5954 } 5955 -- _nParked ; 5956 if (_Event >= 0) ret = OS_OK ; 5957 _Event = 0 ; 5958 status = os::Solaris::mutex_unlock(_mutex); 5959 assert_status(status == 0, status, "mutex_unlock"); 5960 return ret; 5961} 5962 5963void os::PlatformEvent::unpark() { 5964 int v, AnyWaiters; 5965 5966 // Increment _Event. 5967 // Another acceptable implementation would be to simply swap 1 5968 // into _Event: 5969 // if (Swap (&_Event, 1) < 0) { 5970 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5971 // if (AnyWaiters) cond_signal (_cond) ; 5972 // } 5973 5974 for (;;) { 5975 v = _Event ; 5976 if (v > 0) { 5977 // The LD of _Event could have reordered or be satisfied 5978 // by a read-aside from this processor's write buffer. 5979 // To avoid problems execute a barrier and then 5980 // ratify the value. A degenerate CAS() would also work. 5981 // Viz., CAS (v+0, &_Event, v) == v). 5982 OrderAccess::fence() ; 5983 if (_Event == v) return ; 5984 continue ; 5985 } 5986 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5987 } 5988 5989 // If the thread associated with the event was parked, wake it. 5990 if (v < 0) { 5991 int status ; 5992 // Wait for the thread assoc with the PlatformEvent to vacate. 5993 status = os::Solaris::mutex_lock(_mutex); 5994 assert_status(status == 0, status, "mutex_lock"); 5995 AnyWaiters = _nParked ; 5996 status = os::Solaris::mutex_unlock(_mutex); 5997 assert_status(status == 0, status, "mutex_unlock"); 5998 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5999 if (AnyWaiters != 0) { 6000 // We intentional signal *after* dropping the lock 6001 // to avoid a common class of futile wakeups. 6002 status = os::Solaris::cond_signal(_cond); 6003 assert_status(status == 0, status, "cond_signal"); 6004 } 6005 } 6006} 6007 6008// JSR166 6009// ------------------------------------------------------- 6010 6011/* 6012 * The solaris and linux implementations of park/unpark are fairly 6013 * conservative for now, but can be improved. They currently use a 6014 * mutex/condvar pair, plus _counter. 6015 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6016 * sets count to 1 and signals condvar. Only one thread ever waits 6017 * on the condvar. Contention seen when trying to park implies that someone 6018 * is unparking you, so don't wait. And spurious returns are fine, so there 6019 * is no need to track notifications. 6020 */ 6021 6022#define NANOSECS_PER_SEC 1000000000 6023#define NANOSECS_PER_MILLISEC 1000000 6024#define MAX_SECS 100000000 6025 6026/* 6027 * This code is common to linux and solaris and will be moved to a 6028 * common place in dolphin. 6029 * 6030 * The passed in time value is either a relative time in nanoseconds 6031 * or an absolute time in milliseconds. Either way it has to be unpacked 6032 * into suitable seconds and nanoseconds components and stored in the 6033 * given timespec structure. 6034 * Given time is a 64-bit value and the time_t used in the timespec is only 6035 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6036 * overflow if times way in the future are given. Further on Solaris versions 6037 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6038 * number of seconds, in abstime, is less than current_time + 100,000,000. 6039 * As it will be 28 years before "now + 100000000" will overflow we can 6040 * ignore overflow and just impose a hard-limit on seconds using the value 6041 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6042 * years from "now". 6043 */ 6044static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6045 assert (time > 0, "convertTime"); 6046 6047 struct timeval now; 6048 int status = gettimeofday(&now, NULL); 6049 assert(status == 0, "gettimeofday"); 6050 6051 time_t max_secs = now.tv_sec + MAX_SECS; 6052 6053 if (isAbsolute) { 6054 jlong secs = time / 1000; 6055 if (secs > max_secs) { 6056 absTime->tv_sec = max_secs; 6057 } 6058 else { 6059 absTime->tv_sec = secs; 6060 } 6061 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6062 } 6063 else { 6064 jlong secs = time / NANOSECS_PER_SEC; 6065 if (secs >= MAX_SECS) { 6066 absTime->tv_sec = max_secs; 6067 absTime->tv_nsec = 0; 6068 } 6069 else { 6070 absTime->tv_sec = now.tv_sec + secs; 6071 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6072 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6073 absTime->tv_nsec -= NANOSECS_PER_SEC; 6074 ++absTime->tv_sec; // note: this must be <= max_secs 6075 } 6076 } 6077 } 6078 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6079 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6080 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6081 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6082} 6083 6084void Parker::park(bool isAbsolute, jlong time) { 6085 6086 // Optional fast-path check: 6087 // Return immediately if a permit is available. 6088 if (_counter > 0) { 6089 _counter = 0 ; 6090 OrderAccess::fence(); 6091 return ; 6092 } 6093 6094 // Optional fast-exit: Check interrupt before trying to wait 6095 Thread* thread = Thread::current(); 6096 assert(thread->is_Java_thread(), "Must be JavaThread"); 6097 JavaThread *jt = (JavaThread *)thread; 6098 if (Thread::is_interrupted(thread, false)) { 6099 return; 6100 } 6101 6102 // First, demultiplex/decode time arguments 6103 timespec absTime; 6104 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6105 return; 6106 } 6107 if (time > 0) { 6108 // Warning: this code might be exposed to the old Solaris time 6109 // round-down bugs. Grep "roundingFix" for details. 6110 unpackTime(&absTime, isAbsolute, time); 6111 } 6112 6113 // Enter safepoint region 6114 // Beware of deadlocks such as 6317397. 6115 // The per-thread Parker:: _mutex is a classic leaf-lock. 6116 // In particular a thread must never block on the Threads_lock while 6117 // holding the Parker:: mutex. If safepoints are pending both the 6118 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6119 ThreadBlockInVM tbivm(jt); 6120 6121 // Don't wait if cannot get lock since interference arises from 6122 // unblocking. Also. check interrupt before trying wait 6123 if (Thread::is_interrupted(thread, false) || 6124 os::Solaris::mutex_trylock(_mutex) != 0) { 6125 return; 6126 } 6127 6128 int status ; 6129 6130 if (_counter > 0) { // no wait needed 6131 _counter = 0; 6132 status = os::Solaris::mutex_unlock(_mutex); 6133 assert (status == 0, "invariant") ; 6134 OrderAccess::fence(); 6135 return; 6136 } 6137 6138#ifdef ASSERT 6139 // Don't catch signals while blocked; let the running threads have the signals. 6140 // (This allows a debugger to break into the running thread.) 6141 sigset_t oldsigs; 6142 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6143 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6144#endif 6145 6146 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6147 jt->set_suspend_equivalent(); 6148 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6149 6150 // Do this the hard way by blocking ... 6151 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6152 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6153 // Only for SPARC >= V8PlusA 6154#if defined(__sparc) && defined(COMPILER2) 6155 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6156#endif 6157 6158 if (time == 0) { 6159 status = os::Solaris::cond_wait (_cond, _mutex) ; 6160 } else { 6161 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6162 } 6163 // Note that an untimed cond_wait() can sometimes return ETIME on older 6164 // versions of the Solaris. 6165 assert_status(status == 0 || status == EINTR || 6166 status == ETIME || status == ETIMEDOUT, 6167 status, "cond_timedwait"); 6168 6169#ifdef ASSERT 6170 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6171#endif 6172 _counter = 0 ; 6173 status = os::Solaris::mutex_unlock(_mutex); 6174 assert_status(status == 0, status, "mutex_unlock") ; 6175 6176 // If externally suspended while waiting, re-suspend 6177 if (jt->handle_special_suspend_equivalent_condition()) { 6178 jt->java_suspend_self(); 6179 } 6180 OrderAccess::fence(); 6181} 6182 6183void Parker::unpark() { 6184 int s, status ; 6185 status = os::Solaris::mutex_lock (_mutex) ; 6186 assert (status == 0, "invariant") ; 6187 s = _counter; 6188 _counter = 1; 6189 status = os::Solaris::mutex_unlock (_mutex) ; 6190 assert (status == 0, "invariant") ; 6191 6192 if (s < 1) { 6193 status = os::Solaris::cond_signal (_cond) ; 6194 assert (status == 0, "invariant") ; 6195 } 6196} 6197 6198extern char** environ; 6199 6200// Run the specified command in a separate process. Return its exit value, 6201// or -1 on failure (e.g. can't fork a new process). 6202// Unlike system(), this function can be called from signal handler. It 6203// doesn't block SIGINT et al. 6204int os::fork_and_exec(char* cmd) { 6205 char * argv[4]; 6206 argv[0] = (char *)"sh"; 6207 argv[1] = (char *)"-c"; 6208 argv[2] = cmd; 6209 argv[3] = NULL; 6210 6211 // fork is async-safe, fork1 is not so can't use in signal handler 6212 pid_t pid; 6213 Thread* t = ThreadLocalStorage::get_thread_slow(); 6214 if (t != NULL && t->is_inside_signal_handler()) { 6215 pid = fork(); 6216 } else { 6217 pid = fork1(); 6218 } 6219 6220 if (pid < 0) { 6221 // fork failed 6222 warning("fork failed: %s", strerror(errno)); 6223 return -1; 6224 6225 } else if (pid == 0) { 6226 // child process 6227 6228 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6229 execve("/usr/bin/sh", argv, environ); 6230 6231 // execve failed 6232 _exit(-1); 6233 6234 } else { 6235 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6236 // care about the actual exit code, for now. 6237 6238 int status; 6239 6240 // Wait for the child process to exit. This returns immediately if 6241 // the child has already exited. */ 6242 while (waitpid(pid, &status, 0) < 0) { 6243 switch (errno) { 6244 case ECHILD: return 0; 6245 case EINTR: break; 6246 default: return -1; 6247 } 6248 } 6249 6250 if (WIFEXITED(status)) { 6251 // The child exited normally; get its exit code. 6252 return WEXITSTATUS(status); 6253 } else if (WIFSIGNALED(status)) { 6254 // The child exited because of a signal 6255 // The best value to return is 0x80 + signal number, 6256 // because that is what all Unix shells do, and because 6257 // it allows callers to distinguish between process exit and 6258 // process death by signal. 6259 return 0x80 + WTERMSIG(status); 6260 } else { 6261 // Unknown exit code; pass it through 6262 return status; 6263 } 6264 } 6265} 6266 6267// is_headless_jre() 6268// 6269// Test for the existence of libmawt in motif21 or xawt directories 6270// in order to report if we are running in a headless jre 6271// 6272bool os::is_headless_jre() { 6273 struct stat statbuf; 6274 char buf[MAXPATHLEN]; 6275 char libmawtpath[MAXPATHLEN]; 6276 const char *xawtstr = "/xawt/libmawt.so"; 6277 const char *motifstr = "/motif21/libmawt.so"; 6278 char *p; 6279 6280 // Get path to libjvm.so 6281 os::jvm_path(buf, sizeof(buf)); 6282 6283 // Get rid of libjvm.so 6284 p = strrchr(buf, '/'); 6285 if (p == NULL) return false; 6286 else *p = '\0'; 6287 6288 // Get rid of client or server 6289 p = strrchr(buf, '/'); 6290 if (p == NULL) return false; 6291 else *p = '\0'; 6292 6293 // check xawt/libmawt.so 6294 strcpy(libmawtpath, buf); 6295 strcat(libmawtpath, xawtstr); 6296 if (::stat(libmawtpath, &statbuf) == 0) return false; 6297 6298 // check motif21/libmawt.so 6299 strcpy(libmawtpath, buf); 6300 strcat(libmawtpath, motifstr); 6301 if (::stat(libmawtpath, &statbuf) == 0) return false; 6302 6303 return true; 6304} 6305 6306size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6307 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6308} 6309 6310int os::close(int fd) { 6311 RESTARTABLE_RETURN_INT(::close(fd)); 6312} 6313 6314int os::socket_close(int fd) { 6315 RESTARTABLE_RETURN_INT(::close(fd)); 6316} 6317 6318int os::recv(int fd, char *buf, int nBytes, int flags) { 6319 INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6320} 6321 6322 6323int os::send(int fd, char *buf, int nBytes, int flags) { 6324 INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6325} 6326 6327int os::raw_send(int fd, char *buf, int nBytes, int flags) { 6328 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 6329} 6330 6331// As both poll and select can be interrupted by signals, we have to be 6332// prepared to restart the system call after updating the timeout, unless 6333// a poll() is done with timeout == -1, in which case we repeat with this 6334// "wait forever" value. 6335 6336int os::timeout(int fd, long timeout) { 6337 int res; 6338 struct timeval t; 6339 julong prevtime, newtime; 6340 static const char* aNull = 0; 6341 struct pollfd pfd; 6342 pfd.fd = fd; 6343 pfd.events = POLLIN; 6344 6345 gettimeofday(&t, &aNull); 6346 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6347 6348 for(;;) { 6349 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6350 if(res == OS_ERR && errno == EINTR) { 6351 if(timeout != -1) { 6352 gettimeofday(&t, &aNull); 6353 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6354 timeout -= newtime - prevtime; 6355 if(timeout <= 0) 6356 return OS_OK; 6357 prevtime = newtime; 6358 } 6359 } else return res; 6360 } 6361} 6362 6363int os::connect(int fd, struct sockaddr *him, int len) { 6364 int _result; 6365 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result, 6366 os::Solaris::clear_interrupted); 6367 6368 // Depending on when thread interruption is reset, _result could be 6369 // one of two values when errno == EINTR 6370 6371 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6372 && (errno == EINTR)) { 6373 /* restarting a connect() changes its errno semantics */ 6374 INTERRUPTIBLE(::connect(fd, him, len), _result, 6375 os::Solaris::clear_interrupted); 6376 /* undo these changes */ 6377 if (_result == OS_ERR) { 6378 if (errno == EALREADY) { 6379 errno = EINPROGRESS; /* fall through */ 6380 } else if (errno == EISCONN) { 6381 errno = 0; 6382 return OS_OK; 6383 } 6384 } 6385 } 6386 return _result; 6387 } 6388 6389int os::accept(int fd, struct sockaddr *him, int *len) { 6390 if (fd < 0) 6391 return OS_ERR; 6392 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him,\ 6393 (socklen_t*) len), os::Solaris::clear_interrupted); 6394 } 6395 6396int os::recvfrom(int fd, char *buf, int nBytes, int flags, 6397 sockaddr *from, int *fromlen) { 6398 //%%note jvm_r11 6399 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes,\ 6400 flags, from, fromlen), os::Solaris::clear_interrupted); 6401} 6402 6403int os::sendto(int fd, char *buf, int len, int flags, 6404 struct sockaddr *to, int tolen) { 6405 //%%note jvm_r11 6406 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags,\ 6407 to, tolen), os::Solaris::clear_interrupted); 6408} 6409 6410int os::socket_available(int fd, jint *pbytes) { 6411 if (fd < 0) 6412 return OS_OK; 6413 6414 int ret; 6415 6416 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6417 6418 //%% note ioctl can return 0 when successful, JVM_SocketAvailable 6419 // is expected to return 0 on failure and 1 on success to the jdk. 6420 6421 return (ret == OS_ERR) ? 0 : 1; 6422} 6423 6424 6425int os::bind(int fd, struct sockaddr *him, int len) { 6426 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6427 os::Solaris::clear_interrupted); 6428} 6429