1 /* 2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "classfile/classLoader.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/icBuffer.hpp" 30 #include "code/vtableStubs.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "jvm_solaris.h" 35 #include "memory/allocation.inline.hpp" 36 #include "memory/filemap.hpp" 37 #include "mutex_solaris.inline.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "os_share_solaris.hpp" 40 #include "prims/jniFastGetField.hpp" 41 #include "prims/jvm.h" 42 #include "prims/jvm_misc.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/extendedPC.hpp" 45 #include "runtime/globals.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/java.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/mutexLocker.hpp" 50 #include "runtime/objectMonitor.hpp" 51 #include "runtime/osThread.hpp" 52 #include "runtime/perfMemory.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/statSampler.hpp" 55 #include "runtime/stubRoutines.hpp" 56 #include "runtime/thread.inline.hpp" 57 #include "runtime/threadCritical.hpp" 58 #include "runtime/timer.hpp" 59 #include "services/attachListener.hpp" 60 #include "services/memTracker.hpp" 61 #include "services/runtimeService.hpp" 62 #include "utilities/decoder.hpp" 63 #include "utilities/defaultStream.hpp" 64 #include "utilities/events.hpp" 65 #include "utilities/growableArray.hpp" 66 #include "utilities/vmError.hpp" 67 68 // put OS-includes here 69 # include <dlfcn.h> 70 # include <errno.h> 71 # include <exception> 72 # include <link.h> 73 # include <poll.h> 74 # include <pthread.h> 75 # include <pwd.h> 76 # include <schedctl.h> 77 # include <setjmp.h> 78 # include <signal.h> 79 # include <stdio.h> 80 # include <alloca.h> 81 # include <sys/filio.h> 82 # include <sys/ipc.h> 83 # include <sys/lwp.h> 84 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 85 # include <sys/mman.h> 86 # include <sys/processor.h> 87 # include <sys/procset.h> 88 # include <sys/pset.h> 89 # include <sys/resource.h> 90 # include <sys/shm.h> 91 # include <sys/socket.h> 92 # include <sys/stat.h> 93 # include <sys/systeminfo.h> 94 # include <sys/time.h> 95 # include <sys/times.h> 96 # include <sys/types.h> 97 # include <sys/wait.h> 98 # include <sys/utsname.h> 99 # include <thread.h> 100 # include <unistd.h> 101 # include <sys/priocntl.h> 102 # include <sys/rtpriocntl.h> 103 # include <sys/tspriocntl.h> 104 # include <sys/iapriocntl.h> 105 # include <sys/fxpriocntl.h> 106 # include <sys/loadavg.h> 107 # include <string.h> 108 # include <stdio.h> 109 110 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 111 # include <sys/procfs.h> // see comment in <sys/procfs.h> 112 113 #define MAX_PATH (2 * K) 114 115 // for timer info max values which include all bits 116 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 117 118 #ifdef _GNU_SOURCE 119 // See bug #6514594 120 extern "C" int madvise(caddr_t, size_t, int); 121 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 122 int attr, int mask); 123 #endif //_GNU_SOURCE 124 125 /* 126 MPSS Changes Start. 127 The JVM binary needs to be built and run on pre-Solaris 9 128 systems, but the constants needed by MPSS are only in Solaris 9 129 header files. They are textually replicated here to allow 130 building on earlier systems. Once building on Solaris 8 is 131 no longer a requirement, these #defines can be replaced by ordinary 132 system .h inclusion. 133 134 In earlier versions of the JDK and Solaris, we used ISM for large pages. 135 But ISM requires shared memory to achieve this and thus has many caveats. 136 MPSS is a fully transparent and is a cleaner way to get large pages. 137 Although we still require keeping ISM for backward compatiblitiy as well as 138 giving the opportunity to use large pages on older systems it is 139 recommended that MPSS be used for Solaris 9 and above. 140 141 */ 142 143 #ifndef MC_HAT_ADVISE 144 145 struct memcntl_mha { 146 uint_t mha_cmd; /* command(s) */ 147 uint_t mha_flags; 148 size_t mha_pagesize; 149 }; 150 #define MC_HAT_ADVISE 7 /* advise hat map size */ 151 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 152 #define MAP_ALIGN 0x200 /* addr specifies alignment */ 153 154 #endif 155 // MPSS Changes End. 156 157 158 // Here are some liblgrp types from sys/lgrp_user.h to be able to 159 // compile on older systems without this header file. 160 161 #ifndef MADV_ACCESS_LWP 162 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 163 #endif 164 #ifndef MADV_ACCESS_MANY 165 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 166 #endif 167 168 #ifndef LGRP_RSRC_CPU 169 # define LGRP_RSRC_CPU 0 /* CPU resources */ 170 #endif 171 #ifndef LGRP_RSRC_MEM 172 # define LGRP_RSRC_MEM 1 /* memory resources */ 173 #endif 174 175 // Some more macros from sys/mman.h that are not present in Solaris 8. 176 177 #ifndef MAX_MEMINFO_CNT 178 /* 179 * info_req request type definitions for meminfo 180 * request types starting with MEMINFO_V are used for Virtual addresses 181 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 182 * addresses 183 */ 184 # define MEMINFO_SHIFT 16 185 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 186 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 187 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 188 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 189 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 190 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 191 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 192 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 193 194 /* maximum number of addresses meminfo() can process at a time */ 195 # define MAX_MEMINFO_CNT 256 196 197 /* maximum number of request types */ 198 # define MAX_MEMINFO_REQ 31 199 #endif 200 201 // see thr_setprio(3T) for the basis of these numbers 202 #define MinimumPriority 0 203 #define NormalPriority 64 204 #define MaximumPriority 127 205 206 // Values for ThreadPriorityPolicy == 1 207 int prio_policy1[CriticalPriority+1] = { 208 -99999, 0, 16, 32, 48, 64, 209 80, 96, 112, 124, 127, 127 }; 210 211 // System parameters used internally 212 static clock_t clock_tics_per_sec = 100; 213 214 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 215 static bool enabled_extended_FILE_stdio = false; 216 217 // For diagnostics to print a message once. see run_periodic_checks 218 static bool check_addr0_done = false; 219 static sigset_t check_signal_done; 220 static bool check_signals = true; 221 222 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 223 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 224 225 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 226 227 228 // "default" initializers for missing libc APIs 229 extern "C" { 230 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 231 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 232 233 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 234 static int lwp_cond_destroy(cond_t *cv) { return 0; } 235 } 236 237 // "default" initializers for pthread-based synchronization 238 extern "C" { 239 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 240 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 241 } 242 243 // Thread Local Storage 244 // This is common to all Solaris platforms so it is defined here, 245 // in this common file. 246 // The declarations are in the os_cpu threadLS*.hpp files. 247 // 248 // Static member initialization for TLS 249 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 250 251 #ifndef PRODUCT 252 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 253 254 int ThreadLocalStorage::_tcacheHit = 0; 255 int ThreadLocalStorage::_tcacheMiss = 0; 256 257 void ThreadLocalStorage::print_statistics() { 258 int total = _tcacheMiss+_tcacheHit; 259 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 260 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 261 } 262 #undef _PCT 263 #endif // PRODUCT 264 265 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 266 int index) { 267 Thread *thread = get_thread_slow(); 268 if (thread != NULL) { 269 address sp = os::current_stack_pointer(); 270 guarantee(thread->_stack_base == NULL || 271 (sp <= thread->_stack_base && 272 sp >= thread->_stack_base - thread->_stack_size) || 273 is_error_reported(), 274 "sp must be inside of selected thread stack"); 275 276 thread->set_self_raw_id(raw_id); // mark for quick retrieval 277 _get_thread_cache[ index ] = thread; 278 } 279 return thread; 280 } 281 282 283 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 284 #define NO_CACHED_THREAD ((Thread*)all_zero) 285 286 void ThreadLocalStorage::pd_set_thread(Thread* thread) { 287 288 // Store the new value before updating the cache to prevent a race 289 // between get_thread_via_cache_slowly() and this store operation. 290 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 291 292 // Update thread cache with new thread if setting on thread create, 293 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 294 uintptr_t raw = pd_raw_thread_id(); 295 int ix = pd_cache_index(raw); 296 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 297 } 298 299 void ThreadLocalStorage::pd_init() { 300 for (int i = 0; i < _pd_cache_size; i++) { 301 _get_thread_cache[i] = NO_CACHED_THREAD; 302 } 303 } 304 305 // Invalidate all the caches (happens to be the same as pd_init). 306 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 307 308 #undef NO_CACHED_THREAD 309 310 // END Thread Local Storage 311 312 static inline size_t adjust_stack_size(address base, size_t size) { 313 if ((ssize_t)size < 0) { 314 // 4759953: Compensate for ridiculous stack size. 315 size = max_intx; 316 } 317 if (size > (size_t)base) { 318 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 319 size = (size_t)base; 320 } 321 return size; 322 } 323 324 static inline stack_t get_stack_info() { 325 stack_t st; 326 int retval = thr_stksegment(&st); 327 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 328 assert(retval == 0, "incorrect return value from thr_stksegment"); 329 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 330 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 331 return st; 332 } 333 334 address os::current_stack_base() { 335 int r = thr_main() ; 336 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 337 bool is_primordial_thread = r; 338 339 // Workaround 4352906, avoid calls to thr_stksegment by 340 // thr_main after the first one (it looks like we trash 341 // some data, causing the value for ss_sp to be incorrect). 342 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 343 stack_t st = get_stack_info(); 344 if (is_primordial_thread) { 345 // cache initial value of stack base 346 os::Solaris::_main_stack_base = (address)st.ss_sp; 347 } 348 return (address)st.ss_sp; 349 } else { 350 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 351 return os::Solaris::_main_stack_base; 352 } 353 } 354 355 size_t os::current_stack_size() { 356 size_t size; 357 358 int r = thr_main() ; 359 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 360 if(!r) { 361 size = get_stack_info().ss_size; 362 } else { 363 struct rlimit limits; 364 getrlimit(RLIMIT_STACK, &limits); 365 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 366 } 367 // base may not be page aligned 368 address base = current_stack_base(); 369 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 370 return (size_t)(base - bottom); 371 } 372 373 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 374 return localtime_r(clock, res); 375 } 376 377 // interruptible infrastructure 378 379 // setup_interruptible saves the thread state before going into an 380 // interruptible system call. 381 // The saved state is used to restore the thread to 382 // its former state whether or not an interrupt is received. 383 // Used by classloader os::read 384 // os::restartable_read calls skip this layer and stay in _thread_in_native 385 386 void os::Solaris::setup_interruptible(JavaThread* thread) { 387 388 JavaThreadState thread_state = thread->thread_state(); 389 390 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 391 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 392 OSThread* osthread = thread->osthread(); 393 osthread->set_saved_interrupt_thread_state(thread_state); 394 thread->frame_anchor()->make_walkable(thread); 395 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 396 } 397 398 // Version of setup_interruptible() for threads that are already in 399 // _thread_blocked. Used by os_sleep(). 400 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 401 thread->frame_anchor()->make_walkable(thread); 402 } 403 404 JavaThread* os::Solaris::setup_interruptible() { 405 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 406 setup_interruptible(thread); 407 return thread; 408 } 409 410 void os::Solaris::try_enable_extended_io() { 411 typedef int (*enable_extended_FILE_stdio_t)(int, int); 412 413 if (!UseExtendedFileIO) { 414 return; 415 } 416 417 enable_extended_FILE_stdio_t enabler = 418 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 419 "enable_extended_FILE_stdio"); 420 if (enabler) { 421 enabler(-1, -1); 422 } 423 } 424 425 426 #ifdef ASSERT 427 428 JavaThread* os::Solaris::setup_interruptible_native() { 429 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 430 JavaThreadState thread_state = thread->thread_state(); 431 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 432 return thread; 433 } 434 435 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 436 JavaThreadState thread_state = thread->thread_state(); 437 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 438 } 439 #endif 440 441 // cleanup_interruptible reverses the effects of setup_interruptible 442 // setup_interruptible_already_blocked() does not need any cleanup. 443 444 void os::Solaris::cleanup_interruptible(JavaThread* thread) { 445 OSThread* osthread = thread->osthread(); 446 447 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 448 } 449 450 // I/O interruption related counters called in _INTERRUPTIBLE 451 452 void os::Solaris::bump_interrupted_before_count() { 453 RuntimeService::record_interrupted_before_count(); 454 } 455 456 void os::Solaris::bump_interrupted_during_count() { 457 RuntimeService::record_interrupted_during_count(); 458 } 459 460 static int _processors_online = 0; 461 462 jint os::Solaris::_os_thread_limit = 0; 463 volatile jint os::Solaris::_os_thread_count = 0; 464 465 julong os::available_memory() { 466 return Solaris::available_memory(); 467 } 468 469 julong os::Solaris::available_memory() { 470 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 471 } 472 473 julong os::Solaris::_physical_memory = 0; 474 475 julong os::physical_memory() { 476 return Solaris::physical_memory(); 477 } 478 479 julong os::allocatable_physical_memory(julong size) { 480 #ifdef _LP64 481 return size; 482 #else 483 julong result = MIN2(size, (julong)3835*M); 484 if (!is_allocatable(result)) { 485 // Memory allocations will be aligned but the alignment 486 // is not known at this point. Alignments will 487 // be at most to LargePageSizeInBytes. Protect 488 // allocations from alignments up to illegal 489 // values. If at this point 2G is illegal. 490 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 491 result = MIN2(size, reasonable_size); 492 } 493 return result; 494 #endif 495 } 496 497 static hrtime_t first_hrtime = 0; 498 static const hrtime_t hrtime_hz = 1000*1000*1000; 499 const int LOCK_BUSY = 1; 500 const int LOCK_FREE = 0; 501 const int LOCK_INVALID = -1; 502 static volatile hrtime_t max_hrtime = 0; 503 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 504 505 506 void os::Solaris::initialize_system_info() { 507 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 508 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 509 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 510 } 511 512 int os::active_processor_count() { 513 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 514 pid_t pid = getpid(); 515 psetid_t pset = PS_NONE; 516 // Are we running in a processor set or is there any processor set around? 517 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 518 uint_t pset_cpus; 519 // Query the number of cpus available to us. 520 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 521 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 522 _processors_online = pset_cpus; 523 return pset_cpus; 524 } 525 } 526 // Otherwise return number of online cpus 527 return online_cpus; 528 } 529 530 static bool find_processors_in_pset(psetid_t pset, 531 processorid_t** id_array, 532 uint_t* id_length) { 533 bool result = false; 534 // Find the number of processors in the processor set. 535 if (pset_info(pset, NULL, id_length, NULL) == 0) { 536 // Make up an array to hold their ids. 537 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 538 // Fill in the array with their processor ids. 539 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 540 result = true; 541 } 542 } 543 return result; 544 } 545 546 // Callers of find_processors_online() must tolerate imprecise results -- 547 // the system configuration can change asynchronously because of DR 548 // or explicit psradm operations. 549 // 550 // We also need to take care that the loop (below) terminates as the 551 // number of processors online can change between the _SC_NPROCESSORS_ONLN 552 // request and the loop that builds the list of processor ids. Unfortunately 553 // there's no reliable way to determine the maximum valid processor id, 554 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 555 // man pages, which claim the processor id set is "sparse, but 556 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 557 // exit the loop. 558 // 559 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 560 // not available on S8.0. 561 562 static bool find_processors_online(processorid_t** id_array, 563 uint* id_length) { 564 const processorid_t MAX_PROCESSOR_ID = 100000 ; 565 // Find the number of processors online. 566 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 567 // Make up an array to hold their ids. 568 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 569 // Processors need not be numbered consecutively. 570 long found = 0; 571 processorid_t next = 0; 572 while (found < *id_length && next < MAX_PROCESSOR_ID) { 573 processor_info_t info; 574 if (processor_info(next, &info) == 0) { 575 // NB, PI_NOINTR processors are effectively online ... 576 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 577 (*id_array)[found] = next; 578 found += 1; 579 } 580 } 581 next += 1; 582 } 583 if (found < *id_length) { 584 // The loop above didn't identify the expected number of processors. 585 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 586 // and re-running the loop, above, but there's no guarantee of progress 587 // if the system configuration is in flux. Instead, we just return what 588 // we've got. Note that in the worst case find_processors_online() could 589 // return an empty set. (As a fall-back in the case of the empty set we 590 // could just return the ID of the current processor). 591 *id_length = found ; 592 } 593 594 return true; 595 } 596 597 static bool assign_distribution(processorid_t* id_array, 598 uint id_length, 599 uint* distribution, 600 uint distribution_length) { 601 // We assume we can assign processorid_t's to uint's. 602 assert(sizeof(processorid_t) == sizeof(uint), 603 "can't convert processorid_t to uint"); 604 // Quick check to see if we won't succeed. 605 if (id_length < distribution_length) { 606 return false; 607 } 608 // Assign processor ids to the distribution. 609 // Try to shuffle processors to distribute work across boards, 610 // assuming 4 processors per board. 611 const uint processors_per_board = ProcessDistributionStride; 612 // Find the maximum processor id. 613 processorid_t max_id = 0; 614 for (uint m = 0; m < id_length; m += 1) { 615 max_id = MAX2(max_id, id_array[m]); 616 } 617 // The next id, to limit loops. 618 const processorid_t limit_id = max_id + 1; 619 // Make up markers for available processors. 620 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 621 for (uint c = 0; c < limit_id; c += 1) { 622 available_id[c] = false; 623 } 624 for (uint a = 0; a < id_length; a += 1) { 625 available_id[id_array[a]] = true; 626 } 627 // Step by "boards", then by "slot", copying to "assigned". 628 // NEEDS_CLEANUP: The assignment of processors should be stateful, 629 // remembering which processors have been assigned by 630 // previous calls, etc., so as to distribute several 631 // independent calls of this method. What we'd like is 632 // It would be nice to have an API that let us ask 633 // how many processes are bound to a processor, 634 // but we don't have that, either. 635 // In the short term, "board" is static so that 636 // subsequent distributions don't all start at board 0. 637 static uint board = 0; 638 uint assigned = 0; 639 // Until we've found enough processors .... 640 while (assigned < distribution_length) { 641 // ... find the next available processor in the board. 642 for (uint slot = 0; slot < processors_per_board; slot += 1) { 643 uint try_id = board * processors_per_board + slot; 644 if ((try_id < limit_id) && (available_id[try_id] == true)) { 645 distribution[assigned] = try_id; 646 available_id[try_id] = false; 647 assigned += 1; 648 break; 649 } 650 } 651 board += 1; 652 if (board * processors_per_board + 0 >= limit_id) { 653 board = 0; 654 } 655 } 656 if (available_id != NULL) { 657 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 658 } 659 return true; 660 } 661 662 void os::set_native_thread_name(const char *name) { 663 // Not yet implemented. 664 return; 665 } 666 667 bool os::distribute_processes(uint length, uint* distribution) { 668 bool result = false; 669 // Find the processor id's of all the available CPUs. 670 processorid_t* id_array = NULL; 671 uint id_length = 0; 672 // There are some races between querying information and using it, 673 // since processor sets can change dynamically. 674 psetid_t pset = PS_NONE; 675 // Are we running in a processor set? 676 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 677 result = find_processors_in_pset(pset, &id_array, &id_length); 678 } else { 679 result = find_processors_online(&id_array, &id_length); 680 } 681 if (result == true) { 682 if (id_length >= length) { 683 result = assign_distribution(id_array, id_length, distribution, length); 684 } else { 685 result = false; 686 } 687 } 688 if (id_array != NULL) { 689 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 690 } 691 return result; 692 } 693 694 bool os::bind_to_processor(uint processor_id) { 695 // We assume that a processorid_t can be stored in a uint. 696 assert(sizeof(uint) == sizeof(processorid_t), 697 "can't convert uint to processorid_t"); 698 int bind_result = 699 processor_bind(P_LWPID, // bind LWP. 700 P_MYID, // bind current LWP. 701 (processorid_t) processor_id, // id. 702 NULL); // don't return old binding. 703 return (bind_result == 0); 704 } 705 706 bool os::getenv(const char* name, char* buffer, int len) { 707 char* val = ::getenv( name ); 708 if ( val == NULL 709 || strlen(val) + 1 > len ) { 710 if (len > 0) buffer[0] = 0; // return a null string 711 return false; 712 } 713 strcpy( buffer, val ); 714 return true; 715 } 716 717 718 // Return true if user is running as root. 719 720 bool os::have_special_privileges() { 721 static bool init = false; 722 static bool privileges = false; 723 if (!init) { 724 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 725 init = true; 726 } 727 return privileges; 728 } 729 730 731 void os::init_system_properties_values() { 732 char arch[12]; 733 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 734 735 // The next steps are taken in the product version: 736 // 737 // Obtain the JAVA_HOME value from the location of libjvm.so. 738 // This library should be located at: 739 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 740 // 741 // If "/jre/lib/" appears at the right place in the path, then we 742 // assume libjvm.so is installed in a JDK and we use this path. 743 // 744 // Otherwise exit with message: "Could not create the Java virtual machine." 745 // 746 // The following extra steps are taken in the debugging version: 747 // 748 // If "/jre/lib/" does NOT appear at the right place in the path 749 // instead of exit check for $JAVA_HOME environment variable. 750 // 751 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 752 // then we append a fake suffix "hotspot/libjvm.so" to this path so 753 // it looks like libjvm.so is installed there 754 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 755 // 756 // Otherwise exit. 757 // 758 // Important note: if the location of libjvm.so changes this 759 // code needs to be changed accordingly. 760 761 // The next few definitions allow the code to be verbatim: 762 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) 763 #define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal) 764 #define getenv(n) ::getenv(n) 765 766 #define EXTENSIONS_DIR "/lib/ext" 767 #define ENDORSED_DIR "/lib/endorsed" 768 #define COMMON_DIR "/usr/jdk/packages" 769 770 { 771 /* sysclasspath, java_home, dll_dir */ 772 { 773 char *home_path; 774 char *dll_path; 775 char *pslash; 776 char buf[MAXPATHLEN]; 777 os::jvm_path(buf, sizeof(buf)); 778 779 // Found the full path to libjvm.so. 780 // Now cut the path to <java_home>/jre if we can. 781 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 782 pslash = strrchr(buf, '/'); 783 if (pslash != NULL) 784 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 785 dll_path = malloc(strlen(buf) + 1); 786 if (dll_path == NULL) 787 return; 788 strcpy(dll_path, buf); 789 Arguments::set_dll_dir(dll_path); 790 791 if (pslash != NULL) { 792 pslash = strrchr(buf, '/'); 793 if (pslash != NULL) { 794 *pslash = '\0'; /* get rid of /<arch> */ 795 pslash = strrchr(buf, '/'); 796 if (pslash != NULL) 797 *pslash = '\0'; /* get rid of /lib */ 798 } 799 } 800 801 home_path = malloc(strlen(buf) + 1); 802 if (home_path == NULL) 803 return; 804 strcpy(home_path, buf); 805 Arguments::set_java_home(home_path); 806 807 if (!set_boot_path('/', ':')) 808 return; 809 } 810 811 /* 812 * Where to look for native libraries 813 */ 814 { 815 // Use dlinfo() to determine the correct java.library.path. 816 // 817 // If we're launched by the Java launcher, and the user 818 // does not set java.library.path explicitly on the commandline, 819 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 820 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 821 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 822 // /usr/lib), which is exactly what we want. 823 // 824 // If the user does set java.library.path, it completely 825 // overwrites this setting, and always has. 826 // 827 // If we're not launched by the Java launcher, we may 828 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 829 // settings. Again, dlinfo does exactly what we want. 830 831 Dl_serinfo _info, *info = &_info; 832 Dl_serpath *path; 833 char* library_path; 834 char *common_path; 835 int i; 836 837 // determine search path count and required buffer size 838 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 839 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 840 } 841 842 // allocate new buffer and initialize 843 info = (Dl_serinfo*)malloc(_info.dls_size); 844 if (info == NULL) { 845 vm_exit_out_of_memory(_info.dls_size, 846 "init_system_properties_values info"); 847 } 848 info->dls_size = _info.dls_size; 849 info->dls_cnt = _info.dls_cnt; 850 851 // obtain search path information 852 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 853 free(info); 854 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 855 } 856 857 path = &info->dls_serpath[0]; 858 859 // Note: Due to a legacy implementation, most of the library path 860 // is set in the launcher. This was to accomodate linking restrictions 861 // on legacy Solaris implementations (which are no longer supported). 862 // Eventually, all the library path setting will be done here. 863 // 864 // However, to prevent the proliferation of improperly built native 865 // libraries, the new path component /usr/jdk/packages is added here. 866 867 // Determine the actual CPU architecture. 868 char cpu_arch[12]; 869 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 870 #ifdef _LP64 871 // If we are a 64-bit vm, perform the following translations: 872 // sparc -> sparcv9 873 // i386 -> amd64 874 if (strcmp(cpu_arch, "sparc") == 0) 875 strcat(cpu_arch, "v9"); 876 else if (strcmp(cpu_arch, "i386") == 0) 877 strcpy(cpu_arch, "amd64"); 878 #endif 879 880 // Construct the invariant part of ld_library_path. Note that the 881 // space for the colon and the trailing null are provided by the 882 // nulls included by the sizeof operator. 883 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 884 common_path = malloc(bufsize); 885 if (common_path == NULL) { 886 free(info); 887 vm_exit_out_of_memory(bufsize, 888 "init_system_properties_values common_path"); 889 } 890 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 891 892 // struct size is more than sufficient for the path components obtained 893 // through the dlinfo() call, so only add additional space for the path 894 // components explicitly added here. 895 bufsize = info->dls_size + strlen(common_path); 896 library_path = malloc(bufsize); 897 if (library_path == NULL) { 898 free(info); 899 free(common_path); 900 vm_exit_out_of_memory(bufsize, 901 "init_system_properties_values library_path"); 902 } 903 library_path[0] = '\0'; 904 905 // Construct the desired Java library path from the linker's library 906 // search path. 907 // 908 // For compatibility, it is optimal that we insert the additional path 909 // components specific to the Java VM after those components specified 910 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 911 // infrastructure. 912 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 913 strcpy(library_path, common_path); 914 } else { 915 int inserted = 0; 916 for (i = 0; i < info->dls_cnt; i++, path++) { 917 uint_t flags = path->dls_flags & LA_SER_MASK; 918 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 919 strcat(library_path, common_path); 920 strcat(library_path, os::path_separator()); 921 inserted = 1; 922 } 923 strcat(library_path, path->dls_name); 924 strcat(library_path, os::path_separator()); 925 } 926 // eliminate trailing path separator 927 library_path[strlen(library_path)-1] = '\0'; 928 } 929 930 // happens before argument parsing - can't use a trace flag 931 // tty->print_raw("init_system_properties_values: native lib path: "); 932 // tty->print_raw_cr(library_path); 933 934 // callee copies into its own buffer 935 Arguments::set_library_path(library_path); 936 937 free(common_path); 938 free(library_path); 939 free(info); 940 } 941 942 /* 943 * Extensions directories. 944 * 945 * Note that the space for the colon and the trailing null are provided 946 * by the nulls included by the sizeof operator (so actually one byte more 947 * than necessary is allocated). 948 */ 949 { 950 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 951 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 952 sizeof(EXTENSIONS_DIR)); 953 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 954 Arguments::get_java_home()); 955 Arguments::set_ext_dirs(buf); 956 } 957 958 /* Endorsed standards default directory. */ 959 { 960 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 961 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 962 Arguments::set_endorsed_dirs(buf); 963 } 964 } 965 966 #undef malloc 967 #undef free 968 #undef getenv 969 #undef EXTENSIONS_DIR 970 #undef ENDORSED_DIR 971 #undef COMMON_DIR 972 973 } 974 975 void os::breakpoint() { 976 BREAKPOINT; 977 } 978 979 bool os::obsolete_option(const JavaVMOption *option) 980 { 981 if (!strncmp(option->optionString, "-Xt", 3)) { 982 return true; 983 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 984 return true; 985 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 986 return true; 987 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 988 return true; 989 } 990 return false; 991 } 992 993 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 994 address stackStart = (address)thread->stack_base(); 995 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 996 if (sp < stackStart && sp >= stackEnd ) return true; 997 return false; 998 } 999 1000 extern "C" void breakpoint() { 1001 // use debugger to set breakpoint here 1002 } 1003 1004 static thread_t main_thread; 1005 1006 // Thread start routine for all new Java threads 1007 extern "C" void* java_start(void* thread_addr) { 1008 // Try to randomize the cache line index of hot stack frames. 1009 // This helps when threads of the same stack traces evict each other's 1010 // cache lines. The threads can be either from the same JVM instance, or 1011 // from different JVM instances. The benefit is especially true for 1012 // processors with hyperthreading technology. 1013 static int counter = 0; 1014 int pid = os::current_process_id(); 1015 alloca(((pid ^ counter++) & 7) * 128); 1016 1017 int prio; 1018 Thread* thread = (Thread*)thread_addr; 1019 OSThread* osthr = thread->osthread(); 1020 1021 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 1022 thread->_schedctl = (void *) schedctl_init () ; 1023 1024 if (UseNUMA) { 1025 int lgrp_id = os::numa_get_group_id(); 1026 if (lgrp_id != -1) { 1027 thread->set_lgrp_id(lgrp_id); 1028 } 1029 } 1030 1031 // If the creator called set priority before we started, 1032 // we need to call set_native_priority now that we have an lwp. 1033 // We used to get the priority from thr_getprio (we called 1034 // thr_setprio way back in create_thread) and pass it to 1035 // set_native_priority, but Solaris scales the priority 1036 // in java_to_os_priority, so when we read it back here, 1037 // we pass trash to set_native_priority instead of what's 1038 // in java_to_os_priority. So we save the native priority 1039 // in the osThread and recall it here. 1040 1041 if ( osthr->thread_id() != -1 ) { 1042 if ( UseThreadPriorities ) { 1043 int prio = osthr->native_priority(); 1044 if (ThreadPriorityVerbose) { 1045 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 1046 INTPTR_FORMAT ", setting priority: %d\n", 1047 osthr->thread_id(), osthr->lwp_id(), prio); 1048 } 1049 os::set_native_priority(thread, prio); 1050 } 1051 } else if (ThreadPriorityVerbose) { 1052 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1053 } 1054 1055 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1056 1057 // initialize signal mask for this thread 1058 os::Solaris::hotspot_sigmask(thread); 1059 1060 thread->run(); 1061 1062 // One less thread is executing 1063 // When the VMThread gets here, the main thread may have already exited 1064 // which frees the CodeHeap containing the Atomic::dec code 1065 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1066 Atomic::dec(&os::Solaris::_os_thread_count); 1067 } 1068 1069 if (UseDetachedThreads) { 1070 thr_exit(NULL); 1071 ShouldNotReachHere(); 1072 } 1073 return NULL; 1074 } 1075 1076 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1077 // Allocate the OSThread object 1078 OSThread* osthread = new OSThread(NULL, NULL); 1079 if (osthread == NULL) return NULL; 1080 1081 // Store info on the Solaris thread into the OSThread 1082 osthread->set_thread_id(thread_id); 1083 osthread->set_lwp_id(_lwp_self()); 1084 thread->_schedctl = (void *) schedctl_init () ; 1085 1086 if (UseNUMA) { 1087 int lgrp_id = os::numa_get_group_id(); 1088 if (lgrp_id != -1) { 1089 thread->set_lgrp_id(lgrp_id); 1090 } 1091 } 1092 1093 if ( ThreadPriorityVerbose ) { 1094 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1095 osthread->thread_id(), osthread->lwp_id() ); 1096 } 1097 1098 // Initial thread state is INITIALIZED, not SUSPENDED 1099 osthread->set_state(INITIALIZED); 1100 1101 return osthread; 1102 } 1103 1104 void os::Solaris::hotspot_sigmask(Thread* thread) { 1105 1106 //Save caller's signal mask 1107 sigset_t sigmask; 1108 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1109 OSThread *osthread = thread->osthread(); 1110 osthread->set_caller_sigmask(sigmask); 1111 1112 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1113 if (!ReduceSignalUsage) { 1114 if (thread->is_VM_thread()) { 1115 // Only the VM thread handles BREAK_SIGNAL ... 1116 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1117 } else { 1118 // ... all other threads block BREAK_SIGNAL 1119 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1120 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1121 } 1122 } 1123 } 1124 1125 bool os::create_attached_thread(JavaThread* thread) { 1126 #ifdef ASSERT 1127 thread->verify_not_published(); 1128 #endif 1129 OSThread* osthread = create_os_thread(thread, thr_self()); 1130 if (osthread == NULL) { 1131 return false; 1132 } 1133 1134 // Initial thread state is RUNNABLE 1135 osthread->set_state(RUNNABLE); 1136 thread->set_osthread(osthread); 1137 1138 // initialize signal mask for this thread 1139 // and save the caller's signal mask 1140 os::Solaris::hotspot_sigmask(thread); 1141 1142 return true; 1143 } 1144 1145 bool os::create_main_thread(JavaThread* thread) { 1146 #ifdef ASSERT 1147 thread->verify_not_published(); 1148 #endif 1149 if (_starting_thread == NULL) { 1150 _starting_thread = create_os_thread(thread, main_thread); 1151 if (_starting_thread == NULL) { 1152 return false; 1153 } 1154 } 1155 1156 // The primodial thread is runnable from the start 1157 _starting_thread->set_state(RUNNABLE); 1158 1159 thread->set_osthread(_starting_thread); 1160 1161 // initialize signal mask for this thread 1162 // and save the caller's signal mask 1163 os::Solaris::hotspot_sigmask(thread); 1164 1165 return true; 1166 } 1167 1168 // _T2_libthread is true if we believe we are running with the newer 1169 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1170 bool os::Solaris::_T2_libthread = false; 1171 1172 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1173 // Allocate the OSThread object 1174 OSThread* osthread = new OSThread(NULL, NULL); 1175 if (osthread == NULL) { 1176 return false; 1177 } 1178 1179 if ( ThreadPriorityVerbose ) { 1180 char *thrtyp; 1181 switch ( thr_type ) { 1182 case vm_thread: 1183 thrtyp = (char *)"vm"; 1184 break; 1185 case cgc_thread: 1186 thrtyp = (char *)"cgc"; 1187 break; 1188 case pgc_thread: 1189 thrtyp = (char *)"pgc"; 1190 break; 1191 case java_thread: 1192 thrtyp = (char *)"java"; 1193 break; 1194 case compiler_thread: 1195 thrtyp = (char *)"compiler"; 1196 break; 1197 case watcher_thread: 1198 thrtyp = (char *)"watcher"; 1199 break; 1200 default: 1201 thrtyp = (char *)"unknown"; 1202 break; 1203 } 1204 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1205 } 1206 1207 // Calculate stack size if it's not specified by caller. 1208 if (stack_size == 0) { 1209 // The default stack size 1M (2M for LP64). 1210 stack_size = (BytesPerWord >> 2) * K * K; 1211 1212 switch (thr_type) { 1213 case os::java_thread: 1214 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1215 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1216 break; 1217 case os::compiler_thread: 1218 if (CompilerThreadStackSize > 0) { 1219 stack_size = (size_t)(CompilerThreadStackSize * K); 1220 break; 1221 } // else fall through: 1222 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1223 case os::vm_thread: 1224 case os::pgc_thread: 1225 case os::cgc_thread: 1226 case os::watcher_thread: 1227 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1228 break; 1229 } 1230 } 1231 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1232 1233 // Initial state is ALLOCATED but not INITIALIZED 1234 osthread->set_state(ALLOCATED); 1235 1236 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1237 // We got lots of threads. Check if we still have some address space left. 1238 // Need to be at least 5Mb of unreserved address space. We do check by 1239 // trying to reserve some. 1240 const size_t VirtualMemoryBangSize = 20*K*K; 1241 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1242 if (mem == NULL) { 1243 delete osthread; 1244 return false; 1245 } else { 1246 // Release the memory again 1247 os::release_memory(mem, VirtualMemoryBangSize); 1248 } 1249 } 1250 1251 // Setup osthread because the child thread may need it. 1252 thread->set_osthread(osthread); 1253 1254 // Create the Solaris thread 1255 // explicit THR_BOUND for T2_libthread case in case 1256 // that assumption is not accurate, but our alternate signal stack 1257 // handling is based on it which must have bound threads 1258 thread_t tid = 0; 1259 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1260 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1261 (thr_type == vm_thread) || 1262 (thr_type == cgc_thread) || 1263 (thr_type == pgc_thread) || 1264 (thr_type == compiler_thread && BackgroundCompilation)) ? 1265 THR_BOUND : 0); 1266 int status; 1267 1268 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1269 // 1270 // On multiprocessors systems, libthread sometimes under-provisions our 1271 // process with LWPs. On a 30-way systems, for instance, we could have 1272 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1273 // to our process. This can result in under utilization of PEs. 1274 // I suspect the problem is related to libthread's LWP 1275 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1276 // upcall policy. 1277 // 1278 // The following code is palliative -- it attempts to ensure that our 1279 // process has sufficient LWPs to take advantage of multiple PEs. 1280 // Proper long-term cures include using user-level threads bound to LWPs 1281 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1282 // slight timing window with respect to sampling _os_thread_count, but 1283 // the race is benign. Also, we should periodically recompute 1284 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1285 // the number of PEs in our partition. You might be tempted to use 1286 // THR_NEW_LWP here, but I'd recommend against it as that could 1287 // result in undesirable growth of the libthread's LWP pool. 1288 // The fix below isn't sufficient; for instance, it doesn't take into count 1289 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1290 // 1291 // Some pathologies this scheme doesn't handle: 1292 // * Threads can block, releasing the LWPs. The LWPs can age out. 1293 // When a large number of threads become ready again there aren't 1294 // enough LWPs available to service them. This can occur when the 1295 // number of ready threads oscillates. 1296 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1297 // 1298 // Finally, we should call thr_setconcurrency() periodically to refresh 1299 // the LWP pool and thwart the LWP age-out mechanism. 1300 // The "+3" term provides a little slop -- we want to slightly overprovision. 1301 1302 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1303 if (!(flags & THR_BOUND)) { 1304 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1305 } 1306 } 1307 // Although this doesn't hurt, we should warn of undefined behavior 1308 // when using unbound T1 threads with schedctl(). This should never 1309 // happen, as the compiler and VM threads are always created bound 1310 DEBUG_ONLY( 1311 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1312 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1313 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1314 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1315 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1316 } 1317 ); 1318 1319 1320 // Mark that we don't have an lwp or thread id yet. 1321 // In case we attempt to set the priority before the thread starts. 1322 osthread->set_lwp_id(-1); 1323 osthread->set_thread_id(-1); 1324 1325 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1326 if (status != 0) { 1327 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1328 perror("os::create_thread"); 1329 } 1330 thread->set_osthread(NULL); 1331 // Need to clean up stuff we've allocated so far 1332 delete osthread; 1333 return false; 1334 } 1335 1336 Atomic::inc(&os::Solaris::_os_thread_count); 1337 1338 // Store info on the Solaris thread into the OSThread 1339 osthread->set_thread_id(tid); 1340 1341 // Remember that we created this thread so we can set priority on it 1342 osthread->set_vm_created(); 1343 1344 // Set the default thread priority. If using bound threads, setting 1345 // lwp priority will be delayed until thread start. 1346 set_native_priority(thread, 1347 DefaultThreadPriority == -1 ? 1348 java_to_os_priority[NormPriority] : 1349 DefaultThreadPriority); 1350 1351 // Initial thread state is INITIALIZED, not SUSPENDED 1352 osthread->set_state(INITIALIZED); 1353 1354 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1355 return true; 1356 } 1357 1358 /* defined for >= Solaris 10. This allows builds on earlier versions 1359 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1360 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1361 * and -XX:+UseAltSigs does nothing since these should have no conflict 1362 */ 1363 #if !defined(SIGJVM1) 1364 #define SIGJVM1 39 1365 #define SIGJVM2 40 1366 #endif 1367 1368 debug_only(static bool signal_sets_initialized = false); 1369 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1370 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1371 int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1372 1373 bool os::Solaris::is_sig_ignored(int sig) { 1374 struct sigaction oact; 1375 sigaction(sig, (struct sigaction*)NULL, &oact); 1376 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1377 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1378 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1379 return true; 1380 else 1381 return false; 1382 } 1383 1384 // Note: SIGRTMIN is a macro that calls sysconf() so it will 1385 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1386 static bool isJVM1available() { 1387 return SIGJVM1 < SIGRTMIN; 1388 } 1389 1390 void os::Solaris::signal_sets_init() { 1391 // Should also have an assertion stating we are still single-threaded. 1392 assert(!signal_sets_initialized, "Already initialized"); 1393 // Fill in signals that are necessarily unblocked for all threads in 1394 // the VM. Currently, we unblock the following signals: 1395 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1396 // by -Xrs (=ReduceSignalUsage)); 1397 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1398 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1399 // the dispositions or masks wrt these signals. 1400 // Programs embedding the VM that want to use the above signals for their 1401 // own purposes must, at this time, use the "-Xrs" option to prevent 1402 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1403 // (See bug 4345157, and other related bugs). 1404 // In reality, though, unblocking these signals is really a nop, since 1405 // these signals are not blocked by default. 1406 sigemptyset(&unblocked_sigs); 1407 sigemptyset(&allowdebug_blocked_sigs); 1408 sigaddset(&unblocked_sigs, SIGILL); 1409 sigaddset(&unblocked_sigs, SIGSEGV); 1410 sigaddset(&unblocked_sigs, SIGBUS); 1411 sigaddset(&unblocked_sigs, SIGFPE); 1412 1413 if (isJVM1available) { 1414 os::Solaris::set_SIGinterrupt(SIGJVM1); 1415 os::Solaris::set_SIGasync(SIGJVM2); 1416 } else if (UseAltSigs) { 1417 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1418 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1419 } else { 1420 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1421 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1422 } 1423 1424 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1425 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1426 1427 if (!ReduceSignalUsage) { 1428 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1429 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1430 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1431 } 1432 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1433 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1434 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1435 } 1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1437 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1439 } 1440 } 1441 // Fill in signals that are blocked by all but the VM thread. 1442 sigemptyset(&vm_sigs); 1443 if (!ReduceSignalUsage) 1444 sigaddset(&vm_sigs, BREAK_SIGNAL); 1445 debug_only(signal_sets_initialized = true); 1446 1447 // For diagnostics only used in run_periodic_checks 1448 sigemptyset(&check_signal_done); 1449 } 1450 1451 // These are signals that are unblocked while a thread is running Java. 1452 // (For some reason, they get blocked by default.) 1453 sigset_t* os::Solaris::unblocked_signals() { 1454 assert(signal_sets_initialized, "Not initialized"); 1455 return &unblocked_sigs; 1456 } 1457 1458 // These are the signals that are blocked while a (non-VM) thread is 1459 // running Java. Only the VM thread handles these signals. 1460 sigset_t* os::Solaris::vm_signals() { 1461 assert(signal_sets_initialized, "Not initialized"); 1462 return &vm_sigs; 1463 } 1464 1465 // These are signals that are blocked during cond_wait to allow debugger in 1466 sigset_t* os::Solaris::allowdebug_blocked_signals() { 1467 assert(signal_sets_initialized, "Not initialized"); 1468 return &allowdebug_blocked_sigs; 1469 } 1470 1471 1472 void _handle_uncaught_cxx_exception() { 1473 VMError err("An uncaught C++ exception"); 1474 err.report_and_die(); 1475 } 1476 1477 1478 // First crack at OS-specific initialization, from inside the new thread. 1479 void os::initialize_thread(Thread* thr) { 1480 int r = thr_main() ; 1481 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1482 if (r) { 1483 JavaThread* jt = (JavaThread *)thr; 1484 assert(jt != NULL,"Sanity check"); 1485 size_t stack_size; 1486 address base = jt->stack_base(); 1487 if (Arguments::created_by_java_launcher()) { 1488 // Use 2MB to allow for Solaris 7 64 bit mode. 1489 stack_size = JavaThread::stack_size_at_create() == 0 1490 ? 2048*K : JavaThread::stack_size_at_create(); 1491 1492 // There are rare cases when we may have already used more than 1493 // the basic stack size allotment before this method is invoked. 1494 // Attempt to allow for a normally sized java_stack. 1495 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1496 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1497 } else { 1498 // 6269555: If we were not created by a Java launcher, i.e. if we are 1499 // running embedded in a native application, treat the primordial thread 1500 // as much like a native attached thread as possible. This means using 1501 // the current stack size from thr_stksegment(), unless it is too large 1502 // to reliably setup guard pages. A reasonable max size is 8MB. 1503 size_t current_size = current_stack_size(); 1504 // This should never happen, but just in case.... 1505 if (current_size == 0) current_size = 2 * K * K; 1506 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1507 } 1508 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1509 stack_size = (size_t)(base - bottom); 1510 1511 assert(stack_size > 0, "Stack size calculation problem"); 1512 1513 if (stack_size > jt->stack_size()) { 1514 NOT_PRODUCT( 1515 struct rlimit limits; 1516 getrlimit(RLIMIT_STACK, &limits); 1517 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1518 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1519 ) 1520 tty->print_cr( 1521 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1522 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1523 "See limit(1) to increase the stack size limit.", 1524 stack_size / K, jt->stack_size() / K); 1525 vm_exit(1); 1526 } 1527 assert(jt->stack_size() >= stack_size, 1528 "Attempt to map more stack than was allocated"); 1529 jt->set_stack_size(stack_size); 1530 } 1531 1532 // 5/22/01: Right now alternate signal stacks do not handle 1533 // throwing stack overflow exceptions, see bug 4463178 1534 // Until a fix is found for this, T2 will NOT imply alternate signal 1535 // stacks. 1536 // If using T2 libthread threads, install an alternate signal stack. 1537 // Because alternate stacks associate with LWPs on Solaris, 1538 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1539 // we prefer to explicitly stack bang. 1540 // If not using T2 libthread, but using UseBoundThreads any threads 1541 // (primordial thread, jni_attachCurrentThread) we do not create, 1542 // probably are not bound, therefore they can not have an alternate 1543 // signal stack. Since our stack banging code is generated and 1544 // is shared across threads, all threads must be bound to allow 1545 // using alternate signal stacks. The alternative is to interpose 1546 // on _lwp_create to associate an alt sig stack with each LWP, 1547 // and this could be a problem when the JVM is embedded. 1548 // We would prefer to use alternate signal stacks with T2 1549 // Since there is currently no accurate way to detect T2 1550 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1551 // on installing alternate signal stacks 1552 1553 1554 // 05/09/03: removed alternate signal stack support for Solaris 1555 // The alternate signal stack mechanism is no longer needed to 1556 // handle stack overflow. This is now handled by allocating 1557 // guard pages (red zone) and stackbanging. 1558 // Initially the alternate signal stack mechanism was removed because 1559 // it did not work with T1 llibthread. Alternate 1560 // signal stacks MUST have all threads bound to lwps. Applications 1561 // can create their own threads and attach them without their being 1562 // bound under T1. This is frequently the case for the primordial thread. 1563 // If we were ever to reenable this mechanism we would need to 1564 // use the dynamic check for T2 libthread. 1565 1566 os::Solaris::init_thread_fpu_state(); 1567 std::set_terminate(_handle_uncaught_cxx_exception); 1568 } 1569 1570 1571 1572 // Free Solaris resources related to the OSThread 1573 void os::free_thread(OSThread* osthread) { 1574 assert(osthread != NULL, "os::free_thread but osthread not set"); 1575 1576 1577 // We are told to free resources of the argument thread, 1578 // but we can only really operate on the current thread. 1579 // The main thread must take the VMThread down synchronously 1580 // before the main thread exits and frees up CodeHeap 1581 guarantee((Thread::current()->osthread() == osthread 1582 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1583 if (Thread::current()->osthread() == osthread) { 1584 // Restore caller's signal mask 1585 sigset_t sigmask = osthread->caller_sigmask(); 1586 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1587 } 1588 delete osthread; 1589 } 1590 1591 void os::pd_start_thread(Thread* thread) { 1592 int status = thr_continue(thread->osthread()->thread_id()); 1593 assert_status(status == 0, status, "thr_continue failed"); 1594 } 1595 1596 1597 intx os::current_thread_id() { 1598 return (intx)thr_self(); 1599 } 1600 1601 static pid_t _initial_pid = 0; 1602 1603 int os::current_process_id() { 1604 return (int)(_initial_pid ? _initial_pid : getpid()); 1605 } 1606 1607 int os::allocate_thread_local_storage() { 1608 // %%% in Win32 this allocates a memory segment pointed to by a 1609 // register. Dan Stein can implement a similar feature in 1610 // Solaris. Alternatively, the VM can do the same thing 1611 // explicitly: malloc some storage and keep the pointer in a 1612 // register (which is part of the thread's context) (or keep it 1613 // in TLS). 1614 // %%% In current versions of Solaris, thr_self and TSD can 1615 // be accessed via short sequences of displaced indirections. 1616 // The value of thr_self is available as %g7(36). 1617 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1618 // assuming that the current thread already has a value bound to k. 1619 // It may be worth experimenting with such access patterns, 1620 // and later having the parameters formally exported from a Solaris 1621 // interface. I think, however, that it will be faster to 1622 // maintain the invariant that %g2 always contains the 1623 // JavaThread in Java code, and have stubs simply 1624 // treat %g2 as a caller-save register, preserving it in a %lN. 1625 thread_key_t tk; 1626 if (thr_keycreate( &tk, NULL ) ) 1627 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1628 "(%s)", strerror(errno))); 1629 return int(tk); 1630 } 1631 1632 void os::free_thread_local_storage(int index) { 1633 // %%% don't think we need anything here 1634 // if ( pthread_key_delete((pthread_key_t) tk) ) 1635 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1636 } 1637 1638 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1639 // small number - point is NO swap space available 1640 void os::thread_local_storage_at_put(int index, void* value) { 1641 // %%% this is used only in threadLocalStorage.cpp 1642 if (thr_setspecific((thread_key_t)index, value)) { 1643 if (errno == ENOMEM) { 1644 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1645 } else { 1646 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1647 "(%s)", strerror(errno))); 1648 } 1649 } else { 1650 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1651 } 1652 } 1653 1654 // This function could be called before TLS is initialized, for example, when 1655 // VM receives an async signal or when VM causes a fatal error during 1656 // initialization. Return NULL if thr_getspecific() fails. 1657 void* os::thread_local_storage_at(int index) { 1658 // %%% this is used only in threadLocalStorage.cpp 1659 void* r = NULL; 1660 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1661 } 1662 1663 1664 // gethrtime can move backwards if read from one cpu and then a different cpu 1665 // getTimeNanos is guaranteed to not move backward on Solaris 1666 // local spinloop created as faster for a CAS on an int than 1667 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1668 // supported on sparc v8 or pre supports_cx8 intel boxes. 1669 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1670 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1671 inline hrtime_t oldgetTimeNanos() { 1672 int gotlock = LOCK_INVALID; 1673 hrtime_t newtime = gethrtime(); 1674 1675 for (;;) { 1676 // grab lock for max_hrtime 1677 int curlock = max_hrtime_lock; 1678 if (curlock & LOCK_BUSY) continue; 1679 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1680 if (newtime > max_hrtime) { 1681 max_hrtime = newtime; 1682 } else { 1683 newtime = max_hrtime; 1684 } 1685 // release lock 1686 max_hrtime_lock = LOCK_FREE; 1687 return newtime; 1688 } 1689 } 1690 // gethrtime can move backwards if read from one cpu and then a different cpu 1691 // getTimeNanos is guaranteed to not move backward on Solaris 1692 inline hrtime_t getTimeNanos() { 1693 if (VM_Version::supports_cx8()) { 1694 const hrtime_t now = gethrtime(); 1695 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1696 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1697 if (now <= prev) return prev; // same or retrograde time; 1698 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1699 assert(obsv >= prev, "invariant"); // Monotonicity 1700 // If the CAS succeeded then we're done and return "now". 1701 // If the CAS failed and the observed value "obs" is >= now then 1702 // we should return "obs". If the CAS failed and now > obs > prv then 1703 // some other thread raced this thread and installed a new value, in which case 1704 // we could either (a) retry the entire operation, (b) retry trying to install now 1705 // or (c) just return obs. We use (c). No loop is required although in some cases 1706 // we might discard a higher "now" value in deference to a slightly lower but freshly 1707 // installed obs value. That's entirely benign -- it admits no new orderings compared 1708 // to (a) or (b) -- and greatly reduces coherence traffic. 1709 // We might also condition (c) on the magnitude of the delta between obs and now. 1710 // Avoiding excessive CAS operations to hot RW locations is critical. 1711 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1712 return (prev == obsv) ? now : obsv ; 1713 } else { 1714 return oldgetTimeNanos(); 1715 } 1716 } 1717 1718 // Time since start-up in seconds to a fine granularity. 1719 // Used by VMSelfDestructTimer and the MemProfiler. 1720 double os::elapsedTime() { 1721 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1722 } 1723 1724 jlong os::elapsed_counter() { 1725 return (jlong)(getTimeNanos() - first_hrtime); 1726 } 1727 1728 jlong os::elapsed_frequency() { 1729 return hrtime_hz; 1730 } 1731 1732 // Return the real, user, and system times in seconds from an 1733 // arbitrary fixed point in the past. 1734 bool os::getTimesSecs(double* process_real_time, 1735 double* process_user_time, 1736 double* process_system_time) { 1737 struct tms ticks; 1738 clock_t real_ticks = times(&ticks); 1739 1740 if (real_ticks == (clock_t) (-1)) { 1741 return false; 1742 } else { 1743 double ticks_per_second = (double) clock_tics_per_sec; 1744 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1745 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1746 // For consistency return the real time from getTimeNanos() 1747 // converted to seconds. 1748 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1749 1750 return true; 1751 } 1752 } 1753 1754 bool os::supports_vtime() { return true; } 1755 1756 bool os::enable_vtime() { 1757 int fd = ::open("/proc/self/ctl", O_WRONLY); 1758 if (fd == -1) 1759 return false; 1760 1761 long cmd[] = { PCSET, PR_MSACCT }; 1762 int res = ::write(fd, cmd, sizeof(long) * 2); 1763 ::close(fd); 1764 if (res != sizeof(long) * 2) 1765 return false; 1766 1767 return true; 1768 } 1769 1770 bool os::vtime_enabled() { 1771 int fd = ::open("/proc/self/status", O_RDONLY); 1772 if (fd == -1) 1773 return false; 1774 1775 pstatus_t status; 1776 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1777 ::close(fd); 1778 if (res != sizeof(pstatus_t)) 1779 return false; 1780 1781 return status.pr_flags & PR_MSACCT; 1782 } 1783 1784 double os::elapsedVTime() { 1785 return (double)gethrvtime() / (double)hrtime_hz; 1786 } 1787 1788 // Used internally for comparisons only 1789 // getTimeMillis guaranteed to not move backwards on Solaris 1790 jlong getTimeMillis() { 1791 jlong nanotime = getTimeNanos(); 1792 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1793 } 1794 1795 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1796 jlong os::javaTimeMillis() { 1797 timeval t; 1798 if (gettimeofday( &t, NULL) == -1) 1799 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1800 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1801 } 1802 1803 jlong os::javaTimeNanos() { 1804 return (jlong)getTimeNanos(); 1805 } 1806 1807 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1808 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1809 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1810 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1811 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1812 } 1813 1814 char * os::local_time_string(char *buf, size_t buflen) { 1815 struct tm t; 1816 time_t long_time; 1817 time(&long_time); 1818 localtime_r(&long_time, &t); 1819 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1820 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1821 t.tm_hour, t.tm_min, t.tm_sec); 1822 return buf; 1823 } 1824 1825 // Note: os::shutdown() might be called very early during initialization, or 1826 // called from signal handler. Before adding something to os::shutdown(), make 1827 // sure it is async-safe and can handle partially initialized VM. 1828 void os::shutdown() { 1829 1830 // allow PerfMemory to attempt cleanup of any persistent resources 1831 perfMemory_exit(); 1832 1833 // needs to remove object in file system 1834 AttachListener::abort(); 1835 1836 // flush buffered output, finish log files 1837 ostream_abort(); 1838 1839 // Check for abort hook 1840 abort_hook_t abort_hook = Arguments::abort_hook(); 1841 if (abort_hook != NULL) { 1842 abort_hook(); 1843 } 1844 } 1845 1846 // Note: os::abort() might be called very early during initialization, or 1847 // called from signal handler. Before adding something to os::abort(), make 1848 // sure it is async-safe and can handle partially initialized VM. 1849 void os::abort(bool dump_core) { 1850 os::shutdown(); 1851 if (dump_core) { 1852 #ifndef PRODUCT 1853 fdStream out(defaultStream::output_fd()); 1854 out.print_raw("Current thread is "); 1855 char buf[16]; 1856 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1857 out.print_raw_cr(buf); 1858 out.print_raw_cr("Dumping core ..."); 1859 #endif 1860 ::abort(); // dump core (for debugging) 1861 } 1862 1863 ::exit(1); 1864 } 1865 1866 // Die immediately, no exit hook, no abort hook, no cleanup. 1867 void os::die() { 1868 ::abort(); // dump core (for debugging) 1869 } 1870 1871 // unused 1872 void os::set_error_file(const char *logfile) {} 1873 1874 // DLL functions 1875 1876 const char* os::dll_file_extension() { return ".so"; } 1877 1878 // This must be hard coded because it's the system's temporary 1879 // directory not the java application's temp directory, ala java.io.tmpdir. 1880 const char* os::get_temp_directory() { return "/tmp"; } 1881 1882 static bool file_exists(const char* filename) { 1883 struct stat statbuf; 1884 if (filename == NULL || strlen(filename) == 0) { 1885 return false; 1886 } 1887 return os::stat(filename, &statbuf) == 0; 1888 } 1889 1890 bool os::dll_build_name(char* buffer, size_t buflen, 1891 const char* pname, const char* fname) { 1892 bool retval = false; 1893 const size_t pnamelen = pname ? strlen(pname) : 0; 1894 1895 // Return error on buffer overflow. 1896 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1897 return retval; 1898 } 1899 1900 if (pnamelen == 0) { 1901 snprintf(buffer, buflen, "lib%s.so", fname); 1902 retval = true; 1903 } else if (strchr(pname, *os::path_separator()) != NULL) { 1904 int n; 1905 char** pelements = split_path(pname, &n); 1906 for (int i = 0 ; i < n ; i++) { 1907 // really shouldn't be NULL but what the heck, check can't hurt 1908 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1909 continue; // skip the empty path values 1910 } 1911 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1912 if (file_exists(buffer)) { 1913 retval = true; 1914 break; 1915 } 1916 } 1917 // release the storage 1918 for (int i = 0 ; i < n ; i++) { 1919 if (pelements[i] != NULL) { 1920 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1921 } 1922 } 1923 if (pelements != NULL) { 1924 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1925 } 1926 } else { 1927 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1928 retval = true; 1929 } 1930 return retval; 1931 } 1932 1933 const char* os::get_current_directory(char *buf, int buflen) { 1934 return getcwd(buf, buflen); 1935 } 1936 1937 // check if addr is inside libjvm.so 1938 bool os::address_is_in_vm(address addr) { 1939 static address libjvm_base_addr; 1940 Dl_info dlinfo; 1941 1942 if (libjvm_base_addr == NULL) { 1943 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1944 libjvm_base_addr = (address)dlinfo.dli_fbase; 1945 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1946 } 1947 1948 if (dladdr((void *)addr, &dlinfo)) { 1949 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1950 } 1951 1952 return false; 1953 } 1954 1955 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1956 static dladdr1_func_type dladdr1_func = NULL; 1957 1958 bool os::dll_address_to_function_name(address addr, char *buf, 1959 int buflen, int * offset) { 1960 Dl_info dlinfo; 1961 1962 // dladdr1_func was initialized in os::init() 1963 if (dladdr1_func){ 1964 // yes, we have dladdr1 1965 1966 // Support for dladdr1 is checked at runtime; it may be 1967 // available even if the vm is built on a machine that does 1968 // not have dladdr1 support. Make sure there is a value for 1969 // RTLD_DL_SYMENT. 1970 #ifndef RTLD_DL_SYMENT 1971 #define RTLD_DL_SYMENT 1 1972 #endif 1973 #ifdef _LP64 1974 Elf64_Sym * info; 1975 #else 1976 Elf32_Sym * info; 1977 #endif 1978 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1979 RTLD_DL_SYMENT)) { 1980 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1981 if (buf != NULL) { 1982 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1983 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1984 } 1985 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1986 return true; 1987 } 1988 } 1989 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1990 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1991 buf, buflen, offset, dlinfo.dli_fname)) { 1992 return true; 1993 } 1994 } 1995 if (buf != NULL) buf[0] = '\0'; 1996 if (offset != NULL) *offset = -1; 1997 return false; 1998 } else { 1999 // no, only dladdr is available 2000 if (dladdr((void *)addr, &dlinfo)) { 2001 if (buf != NULL) { 2002 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2003 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2004 } 2005 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2006 return true; 2007 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2008 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2009 buf, buflen, offset, dlinfo.dli_fname)) { 2010 return true; 2011 } 2012 } 2013 if (buf != NULL) buf[0] = '\0'; 2014 if (offset != NULL) *offset = -1; 2015 return false; 2016 } 2017 } 2018 2019 bool os::dll_address_to_library_name(address addr, char* buf, 2020 int buflen, int* offset) { 2021 Dl_info dlinfo; 2022 2023 if (dladdr((void*)addr, &dlinfo)){ 2024 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2025 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2026 return true; 2027 } else { 2028 if (buf) buf[0] = '\0'; 2029 if (offset) *offset = -1; 2030 return false; 2031 } 2032 } 2033 2034 // Prints the names and full paths of all opened dynamic libraries 2035 // for current process 2036 void os::print_dll_info(outputStream * st) { 2037 Dl_info dli; 2038 void *handle; 2039 Link_map *map; 2040 Link_map *p; 2041 2042 st->print_cr("Dynamic libraries:"); st->flush(); 2043 2044 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2045 st->print_cr("Error: Cannot print dynamic libraries."); 2046 return; 2047 } 2048 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2049 if (handle == NULL) { 2050 st->print_cr("Error: Cannot print dynamic libraries."); 2051 return; 2052 } 2053 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2054 if (map == NULL) { 2055 st->print_cr("Error: Cannot print dynamic libraries."); 2056 return; 2057 } 2058 2059 while (map->l_prev != NULL) 2060 map = map->l_prev; 2061 2062 while (map != NULL) { 2063 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2064 map = map->l_next; 2065 } 2066 2067 dlclose(handle); 2068 } 2069 2070 // Loads .dll/.so and 2071 // in case of error it checks if .dll/.so was built for the 2072 // same architecture as Hotspot is running on 2073 2074 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2075 { 2076 void * result= ::dlopen(filename, RTLD_LAZY); 2077 if (result != NULL) { 2078 // Successful loading 2079 return result; 2080 } 2081 2082 Elf32_Ehdr elf_head; 2083 2084 // Read system error message into ebuf 2085 // It may or may not be overwritten below 2086 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2087 ebuf[ebuflen-1]='\0'; 2088 int diag_msg_max_length=ebuflen-strlen(ebuf); 2089 char* diag_msg_buf=ebuf+strlen(ebuf); 2090 2091 if (diag_msg_max_length==0) { 2092 // No more space in ebuf for additional diagnostics message 2093 return NULL; 2094 } 2095 2096 2097 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2098 2099 if (file_descriptor < 0) { 2100 // Can't open library, report dlerror() message 2101 return NULL; 2102 } 2103 2104 bool failed_to_read_elf_head= 2105 (sizeof(elf_head)!= 2106 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2107 2108 ::close(file_descriptor); 2109 if (failed_to_read_elf_head) { 2110 // file i/o error - report dlerror() msg 2111 return NULL; 2112 } 2113 2114 typedef struct { 2115 Elf32_Half code; // Actual value as defined in elf.h 2116 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2117 char elf_class; // 32 or 64 bit 2118 char endianess; // MSB or LSB 2119 char* name; // String representation 2120 } arch_t; 2121 2122 static const arch_t arch_array[]={ 2123 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2124 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2125 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2126 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2127 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2128 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2129 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2130 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2131 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2132 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2133 }; 2134 2135 #if (defined IA32) 2136 static Elf32_Half running_arch_code=EM_386; 2137 #elif (defined AMD64) 2138 static Elf32_Half running_arch_code=EM_X86_64; 2139 #elif (defined IA64) 2140 static Elf32_Half running_arch_code=EM_IA_64; 2141 #elif (defined __sparc) && (defined _LP64) 2142 static Elf32_Half running_arch_code=EM_SPARCV9; 2143 #elif (defined __sparc) && (!defined _LP64) 2144 static Elf32_Half running_arch_code=EM_SPARC; 2145 #elif (defined __powerpc64__) 2146 static Elf32_Half running_arch_code=EM_PPC64; 2147 #elif (defined __powerpc__) 2148 static Elf32_Half running_arch_code=EM_PPC; 2149 #elif (defined ARM) 2150 static Elf32_Half running_arch_code=EM_ARM; 2151 #else 2152 #error Method os::dll_load requires that one of following is defined:\ 2153 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2154 #endif 2155 2156 // Identify compatability class for VM's architecture and library's architecture 2157 // Obtain string descriptions for architectures 2158 2159 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2160 int running_arch_index=-1; 2161 2162 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2163 if (running_arch_code == arch_array[i].code) { 2164 running_arch_index = i; 2165 } 2166 if (lib_arch.code == arch_array[i].code) { 2167 lib_arch.compat_class = arch_array[i].compat_class; 2168 lib_arch.name = arch_array[i].name; 2169 } 2170 } 2171 2172 assert(running_arch_index != -1, 2173 "Didn't find running architecture code (running_arch_code) in arch_array"); 2174 if (running_arch_index == -1) { 2175 // Even though running architecture detection failed 2176 // we may still continue with reporting dlerror() message 2177 return NULL; 2178 } 2179 2180 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2181 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2182 return NULL; 2183 } 2184 2185 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2187 return NULL; 2188 } 2189 2190 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2191 if ( lib_arch.name!=NULL ) { 2192 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2193 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2194 lib_arch.name, arch_array[running_arch_index].name); 2195 } else { 2196 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2197 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2198 lib_arch.code, 2199 arch_array[running_arch_index].name); 2200 } 2201 } 2202 2203 return NULL; 2204 } 2205 2206 void* os::dll_lookup(void* handle, const char* name) { 2207 return dlsym(handle, name); 2208 } 2209 2210 int os::stat(const char *path, struct stat *sbuf) { 2211 char pathbuf[MAX_PATH]; 2212 if (strlen(path) > MAX_PATH - 1) { 2213 errno = ENAMETOOLONG; 2214 return -1; 2215 } 2216 os::native_path(strcpy(pathbuf, path)); 2217 return ::stat(pathbuf, sbuf); 2218 } 2219 2220 static bool _print_ascii_file(const char* filename, outputStream* st) { 2221 int fd = ::open(filename, O_RDONLY); 2222 if (fd == -1) { 2223 return false; 2224 } 2225 2226 char buf[32]; 2227 int bytes; 2228 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2229 st->print_raw(buf, bytes); 2230 } 2231 2232 ::close(fd); 2233 2234 return true; 2235 } 2236 2237 void os::print_os_info_brief(outputStream* st) { 2238 os::Solaris::print_distro_info(st); 2239 2240 os::Posix::print_uname_info(st); 2241 2242 os::Solaris::print_libversion_info(st); 2243 } 2244 2245 void os::print_os_info(outputStream* st) { 2246 st->print("OS:"); 2247 2248 os::Solaris::print_distro_info(st); 2249 2250 os::Posix::print_uname_info(st); 2251 2252 os::Solaris::print_libversion_info(st); 2253 2254 os::Posix::print_rlimit_info(st); 2255 2256 os::Posix::print_load_average(st); 2257 } 2258 2259 void os::Solaris::print_distro_info(outputStream* st) { 2260 if (!_print_ascii_file("/etc/release", st)) { 2261 st->print("Solaris"); 2262 } 2263 st->cr(); 2264 } 2265 2266 void os::Solaris::print_libversion_info(outputStream* st) { 2267 if (os::Solaris::T2_libthread()) { 2268 st->print(" (T2 libthread)"); 2269 } 2270 else { 2271 st->print(" (T1 libthread)"); 2272 } 2273 st->cr(); 2274 } 2275 2276 static bool check_addr0(outputStream* st) { 2277 jboolean status = false; 2278 int fd = ::open("/proc/self/map",O_RDONLY); 2279 if (fd >= 0) { 2280 prmap_t p; 2281 while(::read(fd, &p, sizeof(p)) > 0) { 2282 if (p.pr_vaddr == 0x0) { 2283 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2284 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2285 st->print("Access:"); 2286 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2287 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2288 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2289 st->cr(); 2290 status = true; 2291 } 2292 ::close(fd); 2293 } 2294 } 2295 return status; 2296 } 2297 2298 void os::pd_print_cpu_info(outputStream* st) { 2299 // Nothing to do for now. 2300 } 2301 2302 void os::print_memory_info(outputStream* st) { 2303 st->print("Memory:"); 2304 st->print(" %dk page", os::vm_page_size()>>10); 2305 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2306 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2307 st->cr(); 2308 (void) check_addr0(st); 2309 } 2310 2311 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2312 // but they're the same for all the solaris architectures that we support. 2313 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2314 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2315 "ILL_COPROC", "ILL_BADSTK" }; 2316 2317 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2318 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2319 "FPE_FLTINV", "FPE_FLTSUB" }; 2320 2321 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2322 2323 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2324 2325 void os::print_siginfo(outputStream* st, void* siginfo) { 2326 st->print("siginfo:"); 2327 2328 const int buflen = 100; 2329 char buf[buflen]; 2330 siginfo_t *si = (siginfo_t*)siginfo; 2331 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2332 char *err = strerror(si->si_errno); 2333 if (si->si_errno != 0 && err != NULL) { 2334 st->print("si_errno=%s", err); 2335 } else { 2336 st->print("si_errno=%d", si->si_errno); 2337 } 2338 const int c = si->si_code; 2339 assert(c > 0, "unexpected si_code"); 2340 switch (si->si_signo) { 2341 case SIGILL: 2342 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2343 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2344 break; 2345 case SIGFPE: 2346 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2347 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2348 break; 2349 case SIGSEGV: 2350 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2351 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2352 break; 2353 case SIGBUS: 2354 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2355 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2356 break; 2357 default: 2358 st->print(", si_code=%d", si->si_code); 2359 // no si_addr 2360 } 2361 2362 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2363 UseSharedSpaces) { 2364 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2365 if (mapinfo->is_in_shared_space(si->si_addr)) { 2366 st->print("\n\nError accessing class data sharing archive." \ 2367 " Mapped file inaccessible during execution, " \ 2368 " possible disk/network problem."); 2369 } 2370 } 2371 st->cr(); 2372 } 2373 2374 // Moved from whole group, because we need them here for diagnostic 2375 // prints. 2376 #define OLDMAXSIGNUM 32 2377 static int Maxsignum = 0; 2378 static int *ourSigFlags = NULL; 2379 2380 extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2381 2382 int os::Solaris::get_our_sigflags(int sig) { 2383 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2384 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2385 return ourSigFlags[sig]; 2386 } 2387 2388 void os::Solaris::set_our_sigflags(int sig, int flags) { 2389 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2390 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2391 ourSigFlags[sig] = flags; 2392 } 2393 2394 2395 static const char* get_signal_handler_name(address handler, 2396 char* buf, int buflen) { 2397 int offset; 2398 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2399 if (found) { 2400 // skip directory names 2401 const char *p1, *p2; 2402 p1 = buf; 2403 size_t len = strlen(os::file_separator()); 2404 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2405 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2406 } else { 2407 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2408 } 2409 return buf; 2410 } 2411 2412 static void print_signal_handler(outputStream* st, int sig, 2413 char* buf, size_t buflen) { 2414 struct sigaction sa; 2415 2416 sigaction(sig, NULL, &sa); 2417 2418 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2419 2420 address handler = (sa.sa_flags & SA_SIGINFO) 2421 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2422 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2423 2424 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2425 st->print("SIG_DFL"); 2426 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2427 st->print("SIG_IGN"); 2428 } else { 2429 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2430 } 2431 2432 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2433 2434 address rh = VMError::get_resetted_sighandler(sig); 2435 // May be, handler was resetted by VMError? 2436 if(rh != NULL) { 2437 handler = rh; 2438 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2439 } 2440 2441 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2442 2443 // Check: is it our handler? 2444 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2445 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2446 // It is our signal handler 2447 // check for flags 2448 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2449 st->print( 2450 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2451 os::Solaris::get_our_sigflags(sig)); 2452 } 2453 } 2454 st->cr(); 2455 } 2456 2457 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2458 st->print_cr("Signal Handlers:"); 2459 print_signal_handler(st, SIGSEGV, buf, buflen); 2460 print_signal_handler(st, SIGBUS , buf, buflen); 2461 print_signal_handler(st, SIGFPE , buf, buflen); 2462 print_signal_handler(st, SIGPIPE, buf, buflen); 2463 print_signal_handler(st, SIGXFSZ, buf, buflen); 2464 print_signal_handler(st, SIGILL , buf, buflen); 2465 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2466 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2467 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2468 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2469 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2470 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2471 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2472 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2473 } 2474 2475 static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2476 2477 // Find the full path to the current module, libjvm.so 2478 void os::jvm_path(char *buf, jint buflen) { 2479 // Error checking. 2480 if (buflen < MAXPATHLEN) { 2481 assert(false, "must use a large-enough buffer"); 2482 buf[0] = '\0'; 2483 return; 2484 } 2485 // Lazy resolve the path to current module. 2486 if (saved_jvm_path[0] != 0) { 2487 strcpy(buf, saved_jvm_path); 2488 return; 2489 } 2490 2491 Dl_info dlinfo; 2492 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2493 assert(ret != 0, "cannot locate libjvm"); 2494 realpath((char *)dlinfo.dli_fname, buf); 2495 2496 if (Arguments::created_by_gamma_launcher()) { 2497 // Support for the gamma launcher. Typical value for buf is 2498 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2499 // the right place in the string, then assume we are installed in a JDK and 2500 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2501 // up the path so it looks like libjvm.so is installed there (append a 2502 // fake suffix hotspot/libjvm.so). 2503 const char *p = buf + strlen(buf) - 1; 2504 for (int count = 0; p > buf && count < 5; ++count) { 2505 for (--p; p > buf && *p != '/'; --p) 2506 /* empty */ ; 2507 } 2508 2509 if (strncmp(p, "/jre/lib/", 9) != 0) { 2510 // Look for JAVA_HOME in the environment. 2511 char* java_home_var = ::getenv("JAVA_HOME"); 2512 if (java_home_var != NULL && java_home_var[0] != 0) { 2513 char cpu_arch[12]; 2514 char* jrelib_p; 2515 int len; 2516 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2517 #ifdef _LP64 2518 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2519 if (strcmp(cpu_arch, "sparc") == 0) { 2520 strcat(cpu_arch, "v9"); 2521 } else if (strcmp(cpu_arch, "i386") == 0) { 2522 strcpy(cpu_arch, "amd64"); 2523 } 2524 #endif 2525 // Check the current module name "libjvm.so". 2526 p = strrchr(buf, '/'); 2527 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2528 2529 realpath(java_home_var, buf); 2530 // determine if this is a legacy image or modules image 2531 // modules image doesn't have "jre" subdirectory 2532 len = strlen(buf); 2533 jrelib_p = buf + len; 2534 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2535 if (0 != access(buf, F_OK)) { 2536 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2537 } 2538 2539 if (0 == access(buf, F_OK)) { 2540 // Use current module name "libjvm.so" 2541 len = strlen(buf); 2542 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2543 } else { 2544 // Go back to path of .so 2545 realpath((char *)dlinfo.dli_fname, buf); 2546 } 2547 } 2548 } 2549 } 2550 2551 strcpy(saved_jvm_path, buf); 2552 } 2553 2554 2555 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2556 // no prefix required, not even "_" 2557 } 2558 2559 2560 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2561 // no suffix required 2562 } 2563 2564 // This method is a copy of JDK's sysGetLastErrorString 2565 // from src/solaris/hpi/src/system_md.c 2566 2567 size_t os::lasterror(char *buf, size_t len) { 2568 2569 if (errno == 0) return 0; 2570 2571 const char *s = ::strerror(errno); 2572 size_t n = ::strlen(s); 2573 if (n >= len) { 2574 n = len - 1; 2575 } 2576 ::strncpy(buf, s, n); 2577 buf[n] = '\0'; 2578 return n; 2579 } 2580 2581 2582 // sun.misc.Signal 2583 2584 extern "C" { 2585 static void UserHandler(int sig, void *siginfo, void *context) { 2586 // Ctrl-C is pressed during error reporting, likely because the error 2587 // handler fails to abort. Let VM die immediately. 2588 if (sig == SIGINT && is_error_reported()) { 2589 os::die(); 2590 } 2591 2592 os::signal_notify(sig); 2593 // We do not need to reinstate the signal handler each time... 2594 } 2595 } 2596 2597 void* os::user_handler() { 2598 return CAST_FROM_FN_PTR(void*, UserHandler); 2599 } 2600 2601 extern "C" { 2602 typedef void (*sa_handler_t)(int); 2603 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2604 } 2605 2606 void* os::signal(int signal_number, void* handler) { 2607 struct sigaction sigAct, oldSigAct; 2608 sigfillset(&(sigAct.sa_mask)); 2609 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2610 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2611 2612 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2613 // -1 means registration failed 2614 return (void *)-1; 2615 2616 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2617 } 2618 2619 void os::signal_raise(int signal_number) { 2620 raise(signal_number); 2621 } 2622 2623 /* 2624 * The following code is moved from os.cpp for making this 2625 * code platform specific, which it is by its very nature. 2626 */ 2627 2628 // a counter for each possible signal value 2629 static int Sigexit = 0; 2630 static int Maxlibjsigsigs; 2631 static jint *pending_signals = NULL; 2632 static int *preinstalled_sigs = NULL; 2633 static struct sigaction *chainedsigactions = NULL; 2634 static sema_t sig_sem; 2635 typedef int (*version_getting_t)(); 2636 version_getting_t os::Solaris::get_libjsig_version = NULL; 2637 static int libjsigversion = NULL; 2638 2639 int os::sigexitnum_pd() { 2640 assert(Sigexit > 0, "signal memory not yet initialized"); 2641 return Sigexit; 2642 } 2643 2644 void os::Solaris::init_signal_mem() { 2645 // Initialize signal structures 2646 Maxsignum = SIGRTMAX; 2647 Sigexit = Maxsignum+1; 2648 assert(Maxsignum >0, "Unable to obtain max signal number"); 2649 2650 Maxlibjsigsigs = Maxsignum; 2651 2652 // pending_signals has one int per signal 2653 // The additional signal is for SIGEXIT - exit signal to signal_thread 2654 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2655 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2656 2657 if (UseSignalChaining) { 2658 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2659 * (Maxsignum + 1), mtInternal); 2660 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2661 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2662 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2663 } 2664 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal); 2665 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2666 } 2667 2668 void os::signal_init_pd() { 2669 int ret; 2670 2671 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2672 assert(ret == 0, "sema_init() failed"); 2673 } 2674 2675 void os::signal_notify(int signal_number) { 2676 int ret; 2677 2678 Atomic::inc(&pending_signals[signal_number]); 2679 ret = ::sema_post(&sig_sem); 2680 assert(ret == 0, "sema_post() failed"); 2681 } 2682 2683 static int check_pending_signals(bool wait_for_signal) { 2684 int ret; 2685 while (true) { 2686 for (int i = 0; i < Sigexit + 1; i++) { 2687 jint n = pending_signals[i]; 2688 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2689 return i; 2690 } 2691 } 2692 if (!wait_for_signal) { 2693 return -1; 2694 } 2695 JavaThread *thread = JavaThread::current(); 2696 ThreadBlockInVM tbivm(thread); 2697 2698 bool threadIsSuspended; 2699 do { 2700 thread->set_suspend_equivalent(); 2701 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2702 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2703 ; 2704 assert(ret == 0, "sema_wait() failed"); 2705 2706 // were we externally suspended while we were waiting? 2707 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2708 if (threadIsSuspended) { 2709 // 2710 // The semaphore has been incremented, but while we were waiting 2711 // another thread suspended us. We don't want to continue running 2712 // while suspended because that would surprise the thread that 2713 // suspended us. 2714 // 2715 ret = ::sema_post(&sig_sem); 2716 assert(ret == 0, "sema_post() failed"); 2717 2718 thread->java_suspend_self(); 2719 } 2720 } while (threadIsSuspended); 2721 } 2722 } 2723 2724 int os::signal_lookup() { 2725 return check_pending_signals(false); 2726 } 2727 2728 int os::signal_wait() { 2729 return check_pending_signals(true); 2730 } 2731 2732 //////////////////////////////////////////////////////////////////////////////// 2733 // Virtual Memory 2734 2735 static int page_size = -1; 2736 2737 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2738 // clear this var if support is not available. 2739 static bool has_map_align = true; 2740 2741 int os::vm_page_size() { 2742 assert(page_size != -1, "must call os::init"); 2743 return page_size; 2744 } 2745 2746 // Solaris allocates memory by pages. 2747 int os::vm_allocation_granularity() { 2748 assert(page_size != -1, "must call os::init"); 2749 return page_size; 2750 } 2751 2752 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2753 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2754 size_t size = bytes; 2755 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2756 if (res != NULL) { 2757 if (UseNUMAInterleaving) { 2758 numa_make_global(addr, bytes); 2759 } 2760 return true; 2761 } 2762 return false; 2763 } 2764 2765 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2766 bool exec) { 2767 if (commit_memory(addr, bytes, exec)) { 2768 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2769 // If the large page size has been set and the VM 2770 // is using large pages, use the large page size 2771 // if it is smaller than the alignment hint. This is 2772 // a case where the VM wants to use a larger alignment size 2773 // for its own reasons but still want to use large pages 2774 // (which is what matters to setting the mpss range. 2775 size_t page_size = 0; 2776 if (large_page_size() < alignment_hint) { 2777 assert(UseLargePages, "Expected to be here for large page use only"); 2778 page_size = large_page_size(); 2779 } else { 2780 // If the alignment hint is less than the large page 2781 // size, the VM wants a particular alignment (thus the hint) 2782 // for internal reasons. Try to set the mpss range using 2783 // the alignment_hint. 2784 page_size = alignment_hint; 2785 } 2786 // Since this is a hint, ignore any failures. 2787 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2788 } 2789 return true; 2790 } 2791 return false; 2792 } 2793 2794 // Uncommit the pages in a specified region. 2795 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2796 if (madvise(addr, bytes, MADV_FREE) < 0) { 2797 debug_only(warning("MADV_FREE failed.")); 2798 return; 2799 } 2800 } 2801 2802 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2803 return os::commit_memory(addr, size); 2804 } 2805 2806 bool os::remove_stack_guard_pages(char* addr, size_t size) { 2807 return os::uncommit_memory(addr, size); 2808 } 2809 2810 // Change the page size in a given range. 2811 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2812 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2813 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2814 if (UseLargePages && UseMPSS) { 2815 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2816 } 2817 } 2818 2819 // Tell the OS to make the range local to the first-touching LWP 2820 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2821 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2822 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2823 debug_only(warning("MADV_ACCESS_LWP failed.")); 2824 } 2825 } 2826 2827 // Tell the OS that this range would be accessed from different LWPs. 2828 void os::numa_make_global(char *addr, size_t bytes) { 2829 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2830 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2831 debug_only(warning("MADV_ACCESS_MANY failed.")); 2832 } 2833 } 2834 2835 // Get the number of the locality groups. 2836 size_t os::numa_get_groups_num() { 2837 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2838 return n != -1 ? n : 1; 2839 } 2840 2841 // Get a list of leaf locality groups. A leaf lgroup is group that 2842 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2843 // board. An LWP is assigned to one of these groups upon creation. 2844 size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2845 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2846 ids[0] = 0; 2847 return 1; 2848 } 2849 int result_size = 0, top = 1, bottom = 0, cur = 0; 2850 for (int k = 0; k < size; k++) { 2851 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2852 (Solaris::lgrp_id_t*)&ids[top], size - top); 2853 if (r == -1) { 2854 ids[0] = 0; 2855 return 1; 2856 } 2857 if (!r) { 2858 // That's a leaf node. 2859 assert (bottom <= cur, "Sanity check"); 2860 // Check if the node has memory 2861 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2862 NULL, 0, LGRP_RSRC_MEM) > 0) { 2863 ids[bottom++] = ids[cur]; 2864 } 2865 } 2866 top += r; 2867 cur++; 2868 } 2869 if (bottom == 0) { 2870 // Handle a situation, when the OS reports no memory available. 2871 // Assume UMA architecture. 2872 ids[0] = 0; 2873 return 1; 2874 } 2875 return bottom; 2876 } 2877 2878 // Detect the topology change. Typically happens during CPU plugging-unplugging. 2879 bool os::numa_topology_changed() { 2880 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2881 if (is_stale != -1 && is_stale) { 2882 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2883 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2884 assert(c != 0, "Failure to initialize LGRP API"); 2885 Solaris::set_lgrp_cookie(c); 2886 return true; 2887 } 2888 return false; 2889 } 2890 2891 // Get the group id of the current LWP. 2892 int os::numa_get_group_id() { 2893 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2894 if (lgrp_id == -1) { 2895 return 0; 2896 } 2897 const int size = os::numa_get_groups_num(); 2898 int *ids = (int*)alloca(size * sizeof(int)); 2899 2900 // Get the ids of all lgroups with memory; r is the count. 2901 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2902 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2903 if (r <= 0) { 2904 return 0; 2905 } 2906 return ids[os::random() % r]; 2907 } 2908 2909 // Request information about the page. 2910 bool os::get_page_info(char *start, page_info* info) { 2911 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2912 uint64_t addr = (uintptr_t)start; 2913 uint64_t outdata[2]; 2914 uint_t validity = 0; 2915 2916 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2917 return false; 2918 } 2919 2920 info->size = 0; 2921 info->lgrp_id = -1; 2922 2923 if ((validity & 1) != 0) { 2924 if ((validity & 2) != 0) { 2925 info->lgrp_id = outdata[0]; 2926 } 2927 if ((validity & 4) != 0) { 2928 info->size = outdata[1]; 2929 } 2930 return true; 2931 } 2932 return false; 2933 } 2934 2935 // Scan the pages from start to end until a page different than 2936 // the one described in the info parameter is encountered. 2937 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2938 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2939 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2940 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2941 uint_t validity[MAX_MEMINFO_CNT]; 2942 2943 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2944 uint64_t p = (uint64_t)start; 2945 while (p < (uint64_t)end) { 2946 addrs[0] = p; 2947 size_t addrs_count = 1; 2948 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2949 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2950 addrs_count++; 2951 } 2952 2953 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2954 return NULL; 2955 } 2956 2957 size_t i = 0; 2958 for (; i < addrs_count; i++) { 2959 if ((validity[i] & 1) != 0) { 2960 if ((validity[i] & 4) != 0) { 2961 if (outdata[types * i + 1] != page_expected->size) { 2962 break; 2963 } 2964 } else 2965 if (page_expected->size != 0) { 2966 break; 2967 } 2968 2969 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2970 if (outdata[types * i] != page_expected->lgrp_id) { 2971 break; 2972 } 2973 } 2974 } else { 2975 return NULL; 2976 } 2977 } 2978 2979 if (i != addrs_count) { 2980 if ((validity[i] & 2) != 0) { 2981 page_found->lgrp_id = outdata[types * i]; 2982 } else { 2983 page_found->lgrp_id = -1; 2984 } 2985 if ((validity[i] & 4) != 0) { 2986 page_found->size = outdata[types * i + 1]; 2987 } else { 2988 page_found->size = 0; 2989 } 2990 return (char*)addrs[i]; 2991 } 2992 2993 p = addrs[addrs_count - 1] + page_size; 2994 } 2995 return end; 2996 } 2997 2998 bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2999 size_t size = bytes; 3000 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3001 // uncommitted page. Otherwise, the read/write might succeed if we 3002 // have enough swap space to back the physical page. 3003 return 3004 NULL != Solaris::mmap_chunk(addr, size, 3005 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3006 PROT_NONE); 3007 } 3008 3009 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3010 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3011 3012 if (b == MAP_FAILED) { 3013 return NULL; 3014 } 3015 return b; 3016 } 3017 3018 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3019 char* addr = requested_addr; 3020 int flags = MAP_PRIVATE | MAP_NORESERVE; 3021 3022 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3023 3024 if (fixed) { 3025 flags |= MAP_FIXED; 3026 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3027 flags |= MAP_ALIGN; 3028 addr = (char*) alignment_hint; 3029 } 3030 3031 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3032 // uncommitted page. Otherwise, the read/write might succeed if we 3033 // have enough swap space to back the physical page. 3034 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3035 } 3036 3037 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3038 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3039 3040 guarantee(requested_addr == NULL || requested_addr == addr, 3041 "OS failed to return requested mmap address."); 3042 return addr; 3043 } 3044 3045 // Reserve memory at an arbitrary address, only if that area is 3046 // available (and not reserved for something else). 3047 3048 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3049 const int max_tries = 10; 3050 char* base[max_tries]; 3051 size_t size[max_tries]; 3052 3053 // Solaris adds a gap between mmap'ed regions. The size of the gap 3054 // is dependent on the requested size and the MMU. Our initial gap 3055 // value here is just a guess and will be corrected later. 3056 bool had_top_overlap = false; 3057 bool have_adjusted_gap = false; 3058 size_t gap = 0x400000; 3059 3060 // Assert only that the size is a multiple of the page size, since 3061 // that's all that mmap requires, and since that's all we really know 3062 // about at this low abstraction level. If we need higher alignment, 3063 // we can either pass an alignment to this method or verify alignment 3064 // in one of the methods further up the call chain. See bug 5044738. 3065 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3066 3067 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3068 // Give it a try, if the kernel honors the hint we can return immediately. 3069 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3070 3071 volatile int err = errno; 3072 if (addr == requested_addr) { 3073 return addr; 3074 } else if (addr != NULL) { 3075 pd_unmap_memory(addr, bytes); 3076 } 3077 3078 if (PrintMiscellaneous && Verbose) { 3079 char buf[256]; 3080 buf[0] = '\0'; 3081 if (addr == NULL) { 3082 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3083 } 3084 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3085 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3086 "%s", bytes, requested_addr, addr, buf); 3087 } 3088 3089 // Address hint method didn't work. Fall back to the old method. 3090 // In theory, once SNV becomes our oldest supported platform, this 3091 // code will no longer be needed. 3092 // 3093 // Repeatedly allocate blocks until the block is allocated at the 3094 // right spot. Give up after max_tries. 3095 int i; 3096 for (i = 0; i < max_tries; ++i) { 3097 base[i] = reserve_memory(bytes); 3098 3099 if (base[i] != NULL) { 3100 // Is this the block we wanted? 3101 if (base[i] == requested_addr) { 3102 size[i] = bytes; 3103 break; 3104 } 3105 3106 // check that the gap value is right 3107 if (had_top_overlap && !have_adjusted_gap) { 3108 size_t actual_gap = base[i-1] - base[i] - bytes; 3109 if (gap != actual_gap) { 3110 // adjust the gap value and retry the last 2 allocations 3111 assert(i > 0, "gap adjustment code problem"); 3112 have_adjusted_gap = true; // adjust the gap only once, just in case 3113 gap = actual_gap; 3114 if (PrintMiscellaneous && Verbose) { 3115 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3116 } 3117 unmap_memory(base[i], bytes); 3118 unmap_memory(base[i-1], size[i-1]); 3119 i-=2; 3120 continue; 3121 } 3122 } 3123 3124 // Does this overlap the block we wanted? Give back the overlapped 3125 // parts and try again. 3126 // 3127 // There is still a bug in this code: if top_overlap == bytes, 3128 // the overlap is offset from requested region by the value of gap. 3129 // In this case giving back the overlapped part will not work, 3130 // because we'll give back the entire block at base[i] and 3131 // therefore the subsequent allocation will not generate a new gap. 3132 // This could be fixed with a new algorithm that used larger 3133 // or variable size chunks to find the requested region - 3134 // but such a change would introduce additional complications. 3135 // It's rare enough that the planets align for this bug, 3136 // so we'll just wait for a fix for 6204603/5003415 which 3137 // will provide a mmap flag to allow us to avoid this business. 3138 3139 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3140 if (top_overlap >= 0 && top_overlap < bytes) { 3141 had_top_overlap = true; 3142 unmap_memory(base[i], top_overlap); 3143 base[i] += top_overlap; 3144 size[i] = bytes - top_overlap; 3145 } else { 3146 size_t bottom_overlap = base[i] + bytes - requested_addr; 3147 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3148 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3149 warning("attempt_reserve_memory_at: possible alignment bug"); 3150 } 3151 unmap_memory(requested_addr, bottom_overlap); 3152 size[i] = bytes - bottom_overlap; 3153 } else { 3154 size[i] = bytes; 3155 } 3156 } 3157 } 3158 } 3159 3160 // Give back the unused reserved pieces. 3161 3162 for (int j = 0; j < i; ++j) { 3163 if (base[j] != NULL) { 3164 unmap_memory(base[j], size[j]); 3165 } 3166 } 3167 3168 return (i < max_tries) ? requested_addr : NULL; 3169 } 3170 3171 bool os::pd_release_memory(char* addr, size_t bytes) { 3172 size_t size = bytes; 3173 return munmap(addr, size) == 0; 3174 } 3175 3176 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3177 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3178 "addr must be page aligned"); 3179 int retVal = mprotect(addr, bytes, prot); 3180 return retVal == 0; 3181 } 3182 3183 // Protect memory (Used to pass readonly pages through 3184 // JNI GetArray<type>Elements with empty arrays.) 3185 // Also, used for serialization page and for compressed oops null pointer 3186 // checking. 3187 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3188 bool is_committed) { 3189 unsigned int p = 0; 3190 switch (prot) { 3191 case MEM_PROT_NONE: p = PROT_NONE; break; 3192 case MEM_PROT_READ: p = PROT_READ; break; 3193 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3194 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3195 default: 3196 ShouldNotReachHere(); 3197 } 3198 // is_committed is unused. 3199 return solaris_mprotect(addr, bytes, p); 3200 } 3201 3202 // guard_memory and unguard_memory only happens within stack guard pages. 3203 // Since ISM pertains only to the heap, guard and unguard memory should not 3204 /// happen with an ISM region. 3205 bool os::guard_memory(char* addr, size_t bytes) { 3206 return solaris_mprotect(addr, bytes, PROT_NONE); 3207 } 3208 3209 bool os::unguard_memory(char* addr, size_t bytes) { 3210 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3211 } 3212 3213 // Large page support 3214 3215 // UseLargePages is the master flag to enable/disable large page memory. 3216 // UseMPSS and UseISM are supported for compatibility reasons. Their combined 3217 // effects can be described in the following table: 3218 // 3219 // UseLargePages UseMPSS UseISM 3220 // false * * => UseLargePages is the master switch, turning 3221 // it off will turn off both UseMPSS and 3222 // UseISM. VM will not use large page memory 3223 // regardless the settings of UseMPSS/UseISM. 3224 // true false false => Unless future Solaris provides other 3225 // mechanism to use large page memory, this 3226 // combination is equivalent to -UseLargePages, 3227 // VM will not use large page memory 3228 // true true false => JVM will use MPSS for large page memory. 3229 // This is the default behavior. 3230 // true false true => JVM will use ISM for large page memory. 3231 // true true true => JVM will use ISM if it is available. 3232 // Otherwise, JVM will fall back to MPSS. 3233 // Becaues ISM is now available on all 3234 // supported Solaris versions, this combination 3235 // is equivalent to +UseISM -UseMPSS. 3236 3237 static size_t _large_page_size = 0; 3238 3239 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3240 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3241 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3242 // can support multiple page sizes. 3243 3244 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3245 // ISM is only recommended on old Solaris where there is no MPSS support. 3246 // Simply choose a conservative value as default. 3247 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3248 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3249 ARM_ONLY(2 * M); 3250 3251 // ISM is available on all supported Solaris versions 3252 return true; 3253 } 3254 3255 // Insertion sort for small arrays (descending order). 3256 static void insertion_sort_descending(size_t* array, int len) { 3257 for (int i = 0; i < len; i++) { 3258 size_t val = array[i]; 3259 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3260 size_t tmp = array[key]; 3261 array[key] = array[key - 1]; 3262 array[key - 1] = tmp; 3263 } 3264 } 3265 } 3266 3267 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3268 const unsigned int usable_count = VM_Version::page_size_count(); 3269 if (usable_count == 1) { 3270 return false; 3271 } 3272 3273 // Find the right getpagesizes interface. When solaris 11 is the minimum 3274 // build platform, getpagesizes() (without the '2') can be called directly. 3275 typedef int (*gps_t)(size_t[], int); 3276 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3277 if (gps_func == NULL) { 3278 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3279 if (gps_func == NULL) { 3280 if (warn) { 3281 warning("MPSS is not supported by the operating system."); 3282 } 3283 return false; 3284 } 3285 } 3286 3287 // Fill the array of page sizes. 3288 int n = (*gps_func)(_page_sizes, page_sizes_max); 3289 assert(n > 0, "Solaris bug?"); 3290 3291 if (n == page_sizes_max) { 3292 // Add a sentinel value (necessary only if the array was completely filled 3293 // since it is static (zeroed at initialization)). 3294 _page_sizes[--n] = 0; 3295 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3296 } 3297 assert(_page_sizes[n] == 0, "missing sentinel"); 3298 trace_page_sizes("available page sizes", _page_sizes, n); 3299 3300 if (n == 1) return false; // Only one page size available. 3301 3302 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3303 // select up to usable_count elements. First sort the array, find the first 3304 // acceptable value, then copy the usable sizes to the top of the array and 3305 // trim the rest. Make sure to include the default page size :-). 3306 // 3307 // A better policy could get rid of the 4M limit by taking the sizes of the 3308 // important VM memory regions (java heap and possibly the code cache) into 3309 // account. 3310 insertion_sort_descending(_page_sizes, n); 3311 const size_t size_limit = 3312 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3313 int beg; 3314 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3315 const int end = MIN2((int)usable_count, n) - 1; 3316 for (int cur = 0; cur < end; ++cur, ++beg) { 3317 _page_sizes[cur] = _page_sizes[beg]; 3318 } 3319 _page_sizes[end] = vm_page_size(); 3320 _page_sizes[end + 1] = 0; 3321 3322 if (_page_sizes[end] > _page_sizes[end - 1]) { 3323 // Default page size is not the smallest; sort again. 3324 insertion_sort_descending(_page_sizes, end + 1); 3325 } 3326 *page_size = _page_sizes[0]; 3327 3328 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3329 return true; 3330 } 3331 3332 void os::large_page_init() { 3333 if (!UseLargePages) { 3334 UseISM = false; 3335 UseMPSS = false; 3336 return; 3337 } 3338 3339 // print a warning if any large page related flag is specified on command line 3340 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3341 !FLAG_IS_DEFAULT(UseISM) || 3342 !FLAG_IS_DEFAULT(UseMPSS) || 3343 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3344 UseISM = UseISM && 3345 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3346 if (UseISM) { 3347 // ISM disables MPSS to be compatible with old JDK behavior 3348 UseMPSS = false; 3349 _page_sizes[0] = _large_page_size; 3350 _page_sizes[1] = vm_page_size(); 3351 } 3352 3353 UseMPSS = UseMPSS && 3354 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3355 3356 UseLargePages = UseISM || UseMPSS; 3357 } 3358 3359 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3360 // Signal to OS that we want large pages for addresses 3361 // from addr, addr + bytes 3362 struct memcntl_mha mpss_struct; 3363 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3364 mpss_struct.mha_pagesize = align; 3365 mpss_struct.mha_flags = 0; 3366 if (memcntl(start, bytes, MC_HAT_ADVISE, 3367 (caddr_t) &mpss_struct, 0, 0) < 0) { 3368 debug_only(warning("Attempt to use MPSS failed.")); 3369 return false; 3370 } 3371 return true; 3372 } 3373 3374 char* os::reserve_memory_special(size_t size, char* addr, bool exec) { 3375 // "exec" is passed in but not used. Creating the shared image for 3376 // the code cache doesn't have an SHM_X executable permission to check. 3377 assert(UseLargePages && UseISM, "only for ISM large pages"); 3378 3379 char* retAddr = NULL; 3380 int shmid; 3381 key_t ismKey; 3382 3383 bool warn_on_failure = UseISM && 3384 (!FLAG_IS_DEFAULT(UseLargePages) || 3385 !FLAG_IS_DEFAULT(UseISM) || 3386 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3387 ); 3388 char msg[128]; 3389 3390 ismKey = IPC_PRIVATE; 3391 3392 // Create a large shared memory region to attach to based on size. 3393 // Currently, size is the total size of the heap 3394 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3395 if (shmid == -1){ 3396 if (warn_on_failure) { 3397 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3398 warning(msg); 3399 } 3400 return NULL; 3401 } 3402 3403 // Attach to the region 3404 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3405 int err = errno; 3406 3407 // Remove shmid. If shmat() is successful, the actual shared memory segment 3408 // will be deleted when it's detached by shmdt() or when the process 3409 // terminates. If shmat() is not successful this will remove the shared 3410 // segment immediately. 3411 shmctl(shmid, IPC_RMID, NULL); 3412 3413 if (retAddr == (char *) -1) { 3414 if (warn_on_failure) { 3415 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3416 warning(msg); 3417 } 3418 return NULL; 3419 } 3420 if ((retAddr != NULL) && UseNUMAInterleaving) { 3421 numa_make_global(retAddr, size); 3422 } 3423 return retAddr; 3424 } 3425 3426 bool os::release_memory_special(char* base, size_t bytes) { 3427 // detaching the SHM segment will also delete it, see reserve_memory_special() 3428 int rslt = shmdt(base); 3429 return rslt == 0; 3430 } 3431 3432 size_t os::large_page_size() { 3433 return _large_page_size; 3434 } 3435 3436 // MPSS allows application to commit large page memory on demand; with ISM 3437 // the entire memory region must be allocated as shared memory. 3438 bool os::can_commit_large_page_memory() { 3439 return UseISM ? false : true; 3440 } 3441 3442 bool os::can_execute_large_page_memory() { 3443 return UseISM ? false : true; 3444 } 3445 3446 static int os_sleep(jlong millis, bool interruptible) { 3447 const jlong limit = INT_MAX; 3448 jlong prevtime; 3449 int res; 3450 3451 while (millis > limit) { 3452 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3453 return res; 3454 millis -= limit; 3455 } 3456 3457 // Restart interrupted polls with new parameters until the proper delay 3458 // has been completed. 3459 3460 prevtime = getTimeMillis(); 3461 3462 while (millis > 0) { 3463 jlong newtime; 3464 3465 if (!interruptible) { 3466 // Following assert fails for os::yield_all: 3467 // assert(!thread->is_Java_thread(), "must not be java thread"); 3468 res = poll(NULL, 0, millis); 3469 } else { 3470 JavaThread *jt = JavaThread::current(); 3471 3472 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3473 os::Solaris::clear_interrupted); 3474 } 3475 3476 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3477 // thread.Interrupt. 3478 3479 // See c/r 6751923. Poll can return 0 before time 3480 // has elapsed if time is set via clock_settime (as NTP does). 3481 // res == 0 if poll timed out (see man poll RETURN VALUES) 3482 // using the logic below checks that we really did 3483 // sleep at least "millis" if not we'll sleep again. 3484 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3485 newtime = getTimeMillis(); 3486 assert(newtime >= prevtime, "time moving backwards"); 3487 /* Doing prevtime and newtime in microseconds doesn't help precision, 3488 and trying to round up to avoid lost milliseconds can result in a 3489 too-short delay. */ 3490 millis -= newtime - prevtime; 3491 if(millis <= 0) 3492 return OS_OK; 3493 prevtime = newtime; 3494 } else 3495 return res; 3496 } 3497 3498 return OS_OK; 3499 } 3500 3501 // Read calls from inside the vm need to perform state transitions 3502 size_t os::read(int fd, void *buf, unsigned int nBytes) { 3503 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3504 } 3505 3506 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3507 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3508 } 3509 3510 int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3511 assert(thread == Thread::current(), "thread consistency check"); 3512 3513 // TODO-FIXME: this should be removed. 3514 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3515 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3516 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3517 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3518 // is fooled into believing that the system is making progress. In the code below we block the 3519 // the watcher thread while safepoint is in progress so that it would not appear as though the 3520 // system is making progress. 3521 if (!Solaris::T2_libthread() && 3522 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3523 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3524 // the entire safepoint, the watcher thread will line up here during the safepoint. 3525 Threads_lock->lock_without_safepoint_check(); 3526 Threads_lock->unlock(); 3527 } 3528 3529 if (thread->is_Java_thread()) { 3530 // This is a JavaThread so we honor the _thread_blocked protocol 3531 // even for sleeps of 0 milliseconds. This was originally done 3532 // as a workaround for bug 4338139. However, now we also do it 3533 // to honor the suspend-equivalent protocol. 3534 3535 JavaThread *jt = (JavaThread *) thread; 3536 ThreadBlockInVM tbivm(jt); 3537 3538 jt->set_suspend_equivalent(); 3539 // cleared by handle_special_suspend_equivalent_condition() or 3540 // java_suspend_self() via check_and_wait_while_suspended() 3541 3542 int ret_code; 3543 if (millis <= 0) { 3544 thr_yield(); 3545 ret_code = 0; 3546 } else { 3547 // The original sleep() implementation did not create an 3548 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3549 // I'm preserving that decision for now. 3550 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3551 3552 ret_code = os_sleep(millis, interruptible); 3553 } 3554 3555 // were we externally suspended while we were waiting? 3556 jt->check_and_wait_while_suspended(); 3557 3558 return ret_code; 3559 } 3560 3561 // non-JavaThread from this point on: 3562 3563 if (millis <= 0) { 3564 thr_yield(); 3565 return 0; 3566 } 3567 3568 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3569 3570 return os_sleep(millis, interruptible); 3571 } 3572 3573 int os::naked_sleep() { 3574 // %% make the sleep time an integer flag. for now use 1 millisec. 3575 return os_sleep(1, false); 3576 } 3577 3578 // Sleep forever; naked call to OS-specific sleep; use with CAUTION 3579 void os::infinite_sleep() { 3580 while (true) { // sleep forever ... 3581 ::sleep(100); // ... 100 seconds at a time 3582 } 3583 } 3584 3585 // Used to convert frequent JVM_Yield() to nops 3586 bool os::dont_yield() { 3587 if (DontYieldALot) { 3588 static hrtime_t last_time = 0; 3589 hrtime_t diff = getTimeNanos() - last_time; 3590 3591 if (diff < DontYieldALotInterval * 1000000) 3592 return true; 3593 3594 last_time += diff; 3595 3596 return false; 3597 } 3598 else { 3599 return false; 3600 } 3601 } 3602 3603 // Caveat: Solaris os::yield() causes a thread-state transition whereas 3604 // the linux and win32 implementations do not. This should be checked. 3605 3606 void os::yield() { 3607 // Yields to all threads with same or greater priority 3608 os::sleep(Thread::current(), 0, false); 3609 } 3610 3611 // Note that yield semantics are defined by the scheduling class to which 3612 // the thread currently belongs. Typically, yield will _not yield to 3613 // other equal or higher priority threads that reside on the dispatch queues 3614 // of other CPUs. 3615 3616 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3617 3618 3619 // On Solaris we found that yield_all doesn't always yield to all other threads. 3620 // There have been cases where there is a thread ready to execute but it doesn't 3621 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3622 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3623 // SIGWAITING signal which will cause a new lwp to be created. So we count the 3624 // number of times yield_all is called in the one loop and increase the sleep 3625 // time after 8 attempts. If this fails too we increase the concurrency level 3626 // so that the starving thread would get an lwp 3627 3628 void os::yield_all(int attempts) { 3629 // Yields to all threads, including threads with lower priorities 3630 if (attempts == 0) { 3631 os::sleep(Thread::current(), 1, false); 3632 } else { 3633 int iterations = attempts % 30; 3634 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3635 // thr_setconcurrency and _getconcurrency make sense only under T1. 3636 int noofLWPS = thr_getconcurrency(); 3637 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3638 thr_setconcurrency(thr_getconcurrency() + 1); 3639 } 3640 } else if (iterations < 25) { 3641 os::sleep(Thread::current(), 1, false); 3642 } else { 3643 os::sleep(Thread::current(), 10, false); 3644 } 3645 } 3646 } 3647 3648 // Called from the tight loops to possibly influence time-sharing heuristics 3649 void os::loop_breaker(int attempts) { 3650 os::yield_all(attempts); 3651 } 3652 3653 3654 // Interface for setting lwp priorities. If we are using T2 libthread, 3655 // which forces the use of BoundThreads or we manually set UseBoundThreads, 3656 // all of our threads will be assigned to real lwp's. Using the thr_setprio 3657 // function is meaningless in this mode so we must adjust the real lwp's priority 3658 // The routines below implement the getting and setting of lwp priorities. 3659 // 3660 // Note: There are three priority scales used on Solaris. Java priotities 3661 // which range from 1 to 10, libthread "thr_setprio" scale which range 3662 // from 0 to 127, and the current scheduling class of the process we 3663 // are running in. This is typically from -60 to +60. 3664 // The setting of the lwp priorities in done after a call to thr_setprio 3665 // so Java priorities are mapped to libthread priorities and we map from 3666 // the latter to lwp priorities. We don't keep priorities stored in 3667 // Java priorities since some of our worker threads want to set priorities 3668 // higher than all Java threads. 3669 // 3670 // For related information: 3671 // (1) man -s 2 priocntl 3672 // (2) man -s 4 priocntl 3673 // (3) man dispadmin 3674 // = librt.so 3675 // = libthread/common/rtsched.c - thrp_setlwpprio(). 3676 // = ps -cL <pid> ... to validate priority. 3677 // = sched_get_priority_min and _max 3678 // pthread_create 3679 // sched_setparam 3680 // pthread_setschedparam 3681 // 3682 // Assumptions: 3683 // + We assume that all threads in the process belong to the same 3684 // scheduling class. IE. an homogenous process. 3685 // + Must be root or in IA group to change change "interactive" attribute. 3686 // Priocntl() will fail silently. The only indication of failure is when 3687 // we read-back the value and notice that it hasn't changed. 3688 // + Interactive threads enter the runq at the head, non-interactive at the tail. 3689 // + For RT, change timeslice as well. Invariant: 3690 // constant "priority integral" 3691 // Konst == TimeSlice * (60-Priority) 3692 // Given a priority, compute appropriate timeslice. 3693 // + Higher numerical values have higher priority. 3694 3695 // sched class attributes 3696 typedef struct { 3697 int schedPolicy; // classID 3698 int maxPrio; 3699 int minPrio; 3700 } SchedInfo; 3701 3702 3703 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3704 3705 #ifdef ASSERT 3706 static int ReadBackValidate = 1; 3707 #endif 3708 static int myClass = 0; 3709 static int myMin = 0; 3710 static int myMax = 0; 3711 static int myCur = 0; 3712 static bool priocntl_enable = false; 3713 3714 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3715 static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3716 3717 // Call the version of priocntl suitable for all supported versions 3718 // of Solaris. We need to call through this wrapper so that we can 3719 // build on Solaris 9 and run on Solaris 8, 9 and 10. 3720 // 3721 // This code should be removed if we ever stop supporting Solaris 8 3722 // and earlier releases. 3723 3724 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3725 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3726 static priocntl_type priocntl_ptr = priocntl_stub; 3727 3728 // Stub to set the value of the real pointer, and then call the real 3729 // function. 3730 3731 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3732 // Try Solaris 8- name only. 3733 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3734 guarantee(tmp != NULL, "priocntl function not found."); 3735 priocntl_ptr = tmp; 3736 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3737 } 3738 3739 3740 // lwp_priocntl_init 3741 // 3742 // Try to determine the priority scale for our process. 3743 // 3744 // Return errno or 0 if OK. 3745 // 3746 static 3747 int lwp_priocntl_init () 3748 { 3749 int rslt; 3750 pcinfo_t ClassInfo; 3751 pcparms_t ParmInfo; 3752 int i; 3753 3754 if (!UseThreadPriorities) return 0; 3755 3756 // We are using Bound threads, we need to determine our priority ranges 3757 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3758 // If ThreadPriorityPolicy is 1, switch tables 3759 if (ThreadPriorityPolicy == 1) { 3760 for (i = 0 ; i < CriticalPriority+1; i++) 3761 os::java_to_os_priority[i] = prio_policy1[i]; 3762 } 3763 if (UseCriticalJavaThreadPriority) { 3764 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3765 // See set_native_priority() and set_lwp_class_and_priority(). 3766 // Save original MaxPriority mapping in case attempt to 3767 // use critical priority fails. 3768 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3769 // Set negative to distinguish from other priorities 3770 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3771 } 3772 } 3773 // Not using Bound Threads, set to ThreadPolicy 1 3774 else { 3775 for ( i = 0 ; i < CriticalPriority+1; i++ ) { 3776 os::java_to_os_priority[i] = prio_policy1[i]; 3777 } 3778 return 0; 3779 } 3780 3781 // Get IDs for a set of well-known scheduling classes. 3782 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3783 // the system. We should have a loop that iterates over the 3784 // classID values, which are known to be "small" integers. 3785 3786 strcpy(ClassInfo.pc_clname, "TS"); 3787 ClassInfo.pc_cid = -1; 3788 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3789 if (rslt < 0) return errno; 3790 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3791 tsLimits.schedPolicy = ClassInfo.pc_cid; 3792 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3793 tsLimits.minPrio = -tsLimits.maxPrio; 3794 3795 strcpy(ClassInfo.pc_clname, "IA"); 3796 ClassInfo.pc_cid = -1; 3797 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3798 if (rslt < 0) return errno; 3799 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3800 iaLimits.schedPolicy = ClassInfo.pc_cid; 3801 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3802 iaLimits.minPrio = -iaLimits.maxPrio; 3803 3804 strcpy(ClassInfo.pc_clname, "RT"); 3805 ClassInfo.pc_cid = -1; 3806 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3807 if (rslt < 0) return errno; 3808 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3809 rtLimits.schedPolicy = ClassInfo.pc_cid; 3810 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3811 rtLimits.minPrio = 0; 3812 3813 strcpy(ClassInfo.pc_clname, "FX"); 3814 ClassInfo.pc_cid = -1; 3815 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3816 if (rslt < 0) return errno; 3817 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3818 fxLimits.schedPolicy = ClassInfo.pc_cid; 3819 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3820 fxLimits.minPrio = 0; 3821 3822 // Query our "current" scheduling class. 3823 // This will normally be IA, TS or, rarely, FX or RT. 3824 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3825 ParmInfo.pc_cid = PC_CLNULL; 3826 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3827 if (rslt < 0) return errno; 3828 myClass = ParmInfo.pc_cid; 3829 3830 // We now know our scheduling classId, get specific information 3831 // about the class. 3832 ClassInfo.pc_cid = myClass; 3833 ClassInfo.pc_clname[0] = 0; 3834 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3835 if (rslt < 0) return errno; 3836 3837 if (ThreadPriorityVerbose) { 3838 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3839 } 3840 3841 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3842 ParmInfo.pc_cid = PC_CLNULL; 3843 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3844 if (rslt < 0) return errno; 3845 3846 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3847 myMin = rtLimits.minPrio; 3848 myMax = rtLimits.maxPrio; 3849 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3850 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3851 myMin = iaLimits.minPrio; 3852 myMax = iaLimits.maxPrio; 3853 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3854 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3855 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3856 myMin = tsLimits.minPrio; 3857 myMax = tsLimits.maxPrio; 3858 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3859 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3860 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3861 myMin = fxLimits.minPrio; 3862 myMax = fxLimits.maxPrio; 3863 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3864 } else { 3865 // No clue - punt 3866 if (ThreadPriorityVerbose) 3867 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3868 return EINVAL; // no clue, punt 3869 } 3870 3871 if (ThreadPriorityVerbose) { 3872 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3873 } 3874 3875 priocntl_enable = true; // Enable changing priorities 3876 return 0; 3877 } 3878 3879 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3880 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3881 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3882 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3883 3884 3885 // scale_to_lwp_priority 3886 // 3887 // Convert from the libthread "thr_setprio" scale to our current 3888 // lwp scheduling class scale. 3889 // 3890 static 3891 int scale_to_lwp_priority (int rMin, int rMax, int x) 3892 { 3893 int v; 3894 3895 if (x == 127) return rMax; // avoid round-down 3896 v = (((x*(rMax-rMin)))/128)+rMin; 3897 return v; 3898 } 3899 3900 3901 // set_lwp_class_and_priority 3902 // 3903 // Set the class and priority of the lwp. This call should only 3904 // be made when using bound threads (T2 threads are bound by default). 3905 // 3906 int set_lwp_class_and_priority(int ThreadID, int lwpid, 3907 int newPrio, int new_class, bool scale) { 3908 int rslt; 3909 int Actual, Expected, prv; 3910 pcparms_t ParmInfo; // for GET-SET 3911 #ifdef ASSERT 3912 pcparms_t ReadBack; // for readback 3913 #endif 3914 3915 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3916 // Query current values. 3917 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3918 // Cache "pcparms_t" in global ParmCache. 3919 // TODO: elide set-to-same-value 3920 3921 // If something went wrong on init, don't change priorities. 3922 if ( !priocntl_enable ) { 3923 if (ThreadPriorityVerbose) 3924 tty->print_cr("Trying to set priority but init failed, ignoring"); 3925 return EINVAL; 3926 } 3927 3928 // If lwp hasn't started yet, just return 3929 // the _start routine will call us again. 3930 if ( lwpid <= 0 ) { 3931 if (ThreadPriorityVerbose) { 3932 tty->print_cr ("deferring the set_lwp_class_and_priority of thread " 3933 INTPTR_FORMAT " to %d, lwpid not set", 3934 ThreadID, newPrio); 3935 } 3936 return 0; 3937 } 3938 3939 if (ThreadPriorityVerbose) { 3940 tty->print_cr ("set_lwp_class_and_priority(" 3941 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3942 ThreadID, lwpid, newPrio); 3943 } 3944 3945 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3946 ParmInfo.pc_cid = PC_CLNULL; 3947 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3948 if (rslt < 0) return errno; 3949 3950 int cur_class = ParmInfo.pc_cid; 3951 ParmInfo.pc_cid = (id_t)new_class; 3952 3953 if (new_class == rtLimits.schedPolicy) { 3954 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3955 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3956 rtLimits.maxPrio, newPrio) 3957 : newPrio; 3958 rtInfo->rt_tqsecs = RT_NOCHANGE; 3959 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3960 if (ThreadPriorityVerbose) { 3961 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3962 } 3963 } else if (new_class == iaLimits.schedPolicy) { 3964 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3965 int maxClamped = MIN2(iaLimits.maxPrio, 3966 cur_class == new_class 3967 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3968 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3969 maxClamped, newPrio) 3970 : newPrio; 3971 iaInfo->ia_uprilim = cur_class == new_class 3972 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3973 iaInfo->ia_mode = IA_NOCHANGE; 3974 if (ThreadPriorityVerbose) { 3975 tty->print_cr("IA: [%d...%d] %d->%d\n", 3976 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3977 } 3978 } else if (new_class == tsLimits.schedPolicy) { 3979 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3980 int maxClamped = MIN2(tsLimits.maxPrio, 3981 cur_class == new_class 3982 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3983 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3984 maxClamped, newPrio) 3985 : newPrio; 3986 tsInfo->ts_uprilim = cur_class == new_class 3987 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3988 if (ThreadPriorityVerbose) { 3989 tty->print_cr("TS: [%d...%d] %d->%d\n", 3990 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3991 } 3992 } else if (new_class == fxLimits.schedPolicy) { 3993 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3994 int maxClamped = MIN2(fxLimits.maxPrio, 3995 cur_class == new_class 3996 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3997 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3998 maxClamped, newPrio) 3999 : newPrio; 4000 fxInfo->fx_uprilim = cur_class == new_class 4001 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 4002 fxInfo->fx_tqsecs = FX_NOCHANGE; 4003 fxInfo->fx_tqnsecs = FX_NOCHANGE; 4004 if (ThreadPriorityVerbose) { 4005 tty->print_cr("FX: [%d...%d] %d->%d\n", 4006 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 4007 } 4008 } else { 4009 if (ThreadPriorityVerbose) { 4010 tty->print_cr("Unknown new scheduling class %d\n", new_class); 4011 } 4012 return EINVAL; // no clue, punt 4013 } 4014 4015 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 4016 if (ThreadPriorityVerbose && rslt) { 4017 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 4018 } 4019 if (rslt < 0) return errno; 4020 4021 #ifdef ASSERT 4022 // Sanity check: read back what we just attempted to set. 4023 // In theory it could have changed in the interim ... 4024 // 4025 // The priocntl system call is tricky. 4026 // Sometimes it'll validate the priority value argument and 4027 // return EINVAL if unhappy. At other times it fails silently. 4028 // Readbacks are prudent. 4029 4030 if (!ReadBackValidate) return 0; 4031 4032 memset(&ReadBack, 0, sizeof(pcparms_t)); 4033 ReadBack.pc_cid = PC_CLNULL; 4034 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 4035 assert(rslt >= 0, "priocntl failed"); 4036 Actual = Expected = 0xBAD; 4037 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 4038 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 4039 Actual = RTPRI(ReadBack)->rt_pri; 4040 Expected = RTPRI(ParmInfo)->rt_pri; 4041 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 4042 Actual = IAPRI(ReadBack)->ia_upri; 4043 Expected = IAPRI(ParmInfo)->ia_upri; 4044 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 4045 Actual = TSPRI(ReadBack)->ts_upri; 4046 Expected = TSPRI(ParmInfo)->ts_upri; 4047 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 4048 Actual = FXPRI(ReadBack)->fx_upri; 4049 Expected = FXPRI(ParmInfo)->fx_upri; 4050 } else { 4051 if (ThreadPriorityVerbose) { 4052 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 4053 ParmInfo.pc_cid); 4054 } 4055 } 4056 4057 if (Actual != Expected) { 4058 if (ThreadPriorityVerbose) { 4059 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4060 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4061 } 4062 } 4063 #endif 4064 4065 return 0; 4066 } 4067 4068 // Solaris only gives access to 128 real priorities at a time, 4069 // so we expand Java's ten to fill this range. This would be better 4070 // if we dynamically adjusted relative priorities. 4071 // 4072 // The ThreadPriorityPolicy option allows us to select 2 different 4073 // priority scales. 4074 // 4075 // ThreadPriorityPolicy=0 4076 // Since the Solaris' default priority is MaximumPriority, we do not 4077 // set a priority lower than Max unless a priority lower than 4078 // NormPriority is requested. 4079 // 4080 // ThreadPriorityPolicy=1 4081 // This mode causes the priority table to get filled with 4082 // linear values. NormPriority get's mapped to 50% of the 4083 // Maximum priority an so on. This will cause VM threads 4084 // to get unfair treatment against other Solaris processes 4085 // which do not explicitly alter their thread priorities. 4086 // 4087 4088 int os::java_to_os_priority[CriticalPriority + 1] = { 4089 -99999, // 0 Entry should never be used 4090 4091 0, // 1 MinPriority 4092 32, // 2 4093 64, // 3 4094 4095 96, // 4 4096 127, // 5 NormPriority 4097 127, // 6 4098 4099 127, // 7 4100 127, // 8 4101 127, // 9 NearMaxPriority 4102 4103 127, // 10 MaxPriority 4104 4105 -criticalPrio // 11 CriticalPriority 4106 }; 4107 4108 OSReturn os::set_native_priority(Thread* thread, int newpri) { 4109 OSThread* osthread = thread->osthread(); 4110 4111 // Save requested priority in case the thread hasn't been started 4112 osthread->set_native_priority(newpri); 4113 4114 // Check for critical priority request 4115 bool fxcritical = false; 4116 if (newpri == -criticalPrio) { 4117 fxcritical = true; 4118 newpri = criticalPrio; 4119 } 4120 4121 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4122 if (!UseThreadPriorities) return OS_OK; 4123 4124 int status = 0; 4125 4126 if (!fxcritical) { 4127 // Use thr_setprio only if we have a priority that thr_setprio understands 4128 status = thr_setprio(thread->osthread()->thread_id(), newpri); 4129 } 4130 4131 if (os::Solaris::T2_libthread() || 4132 (UseBoundThreads && osthread->is_vm_created())) { 4133 int lwp_status = 4134 set_lwp_class_and_priority(osthread->thread_id(), 4135 osthread->lwp_id(), 4136 newpri, 4137 fxcritical ? fxLimits.schedPolicy : myClass, 4138 !fxcritical); 4139 if (lwp_status != 0 && fxcritical) { 4140 // Try again, this time without changing the scheduling class 4141 newpri = java_MaxPriority_to_os_priority; 4142 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 4143 osthread->lwp_id(), 4144 newpri, myClass, false); 4145 } 4146 status |= lwp_status; 4147 } 4148 return (status == 0) ? OS_OK : OS_ERR; 4149 } 4150 4151 4152 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4153 int p; 4154 if ( !UseThreadPriorities ) { 4155 *priority_ptr = NormalPriority; 4156 return OS_OK; 4157 } 4158 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4159 if (status != 0) { 4160 return OS_ERR; 4161 } 4162 *priority_ptr = p; 4163 return OS_OK; 4164 } 4165 4166 4167 // Hint to the underlying OS that a task switch would not be good. 4168 // Void return because it's a hint and can fail. 4169 void os::hint_no_preempt() { 4170 schedctl_start(schedctl_init()); 4171 } 4172 4173 void os::interrupt(Thread* thread) { 4174 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4175 4176 OSThread* osthread = thread->osthread(); 4177 4178 int isInterrupted = osthread->interrupted(); 4179 if (!isInterrupted) { 4180 osthread->set_interrupted(true); 4181 OrderAccess::fence(); 4182 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4183 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4184 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4185 ParkEvent * const slp = thread->_SleepEvent ; 4186 if (slp != NULL) slp->unpark() ; 4187 } 4188 4189 // For JSR166: unpark after setting status but before thr_kill -dl 4190 if (thread->is_Java_thread()) { 4191 ((JavaThread*)thread)->parker()->unpark(); 4192 } 4193 4194 // Handle interruptible wait() ... 4195 ParkEvent * const ev = thread->_ParkEvent ; 4196 if (ev != NULL) ev->unpark() ; 4197 4198 // When events are used everywhere for os::sleep, then this thr_kill 4199 // will only be needed if UseVMInterruptibleIO is true. 4200 4201 if (!isInterrupted) { 4202 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4203 assert_status(status == 0, status, "thr_kill"); 4204 4205 // Bump thread interruption counter 4206 RuntimeService::record_thread_interrupt_signaled_count(); 4207 } 4208 } 4209 4210 4211 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4212 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4213 4214 OSThread* osthread = thread->osthread(); 4215 4216 bool res = osthread->interrupted(); 4217 4218 // NOTE that since there is no "lock" around these two operations, 4219 // there is the possibility that the interrupted flag will be 4220 // "false" but that the interrupt event will be set. This is 4221 // intentional. The effect of this is that Object.wait() will appear 4222 // to have a spurious wakeup, which is not harmful, and the 4223 // possibility is so rare that it is not worth the added complexity 4224 // to add yet another lock. It has also been recommended not to put 4225 // the interrupted flag into the os::Solaris::Event structure, 4226 // because it hides the issue. 4227 if (res && clear_interrupted) { 4228 osthread->set_interrupted(false); 4229 } 4230 return res; 4231 } 4232 4233 4234 void os::print_statistics() { 4235 } 4236 4237 int os::message_box(const char* title, const char* message) { 4238 int i; 4239 fdStream err(defaultStream::error_fd()); 4240 for (i = 0; i < 78; i++) err.print_raw("="); 4241 err.cr(); 4242 err.print_raw_cr(title); 4243 for (i = 0; i < 78; i++) err.print_raw("-"); 4244 err.cr(); 4245 err.print_raw_cr(message); 4246 for (i = 0; i < 78; i++) err.print_raw("="); 4247 err.cr(); 4248 4249 char buf[16]; 4250 // Prevent process from exiting upon "read error" without consuming all CPU 4251 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4252 4253 return buf[0] == 'y' || buf[0] == 'Y'; 4254 } 4255 4256 // A lightweight implementation that does not suspend the target thread and 4257 // thus returns only a hint. Used for profiling only! 4258 ExtendedPC os::get_thread_pc(Thread* thread) { 4259 // Make sure that it is called by the watcher and the Threads lock is owned. 4260 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4261 // For now, is only used to profile the VM Thread 4262 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4263 ExtendedPC epc; 4264 4265 GetThreadPC_Callback cb(ProfileVM_lock); 4266 OSThread *osthread = thread->osthread(); 4267 const int time_to_wait = 400; // 400ms wait for initial response 4268 int status = cb.interrupt(thread, time_to_wait); 4269 4270 if (cb.is_done() ) { 4271 epc = cb.addr(); 4272 } else { 4273 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4274 osthread->thread_id(), status);); 4275 // epc is already NULL 4276 } 4277 return epc; 4278 } 4279 4280 4281 // This does not do anything on Solaris. This is basically a hook for being 4282 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4283 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4284 f(value, method, args, thread); 4285 } 4286 4287 // This routine may be used by user applications as a "hook" to catch signals. 4288 // The user-defined signal handler must pass unrecognized signals to this 4289 // routine, and if it returns true (non-zero), then the signal handler must 4290 // return immediately. If the flag "abort_if_unrecognized" is true, then this 4291 // routine will never retun false (zero), but instead will execute a VM panic 4292 // routine kill the process. 4293 // 4294 // If this routine returns false, it is OK to call it again. This allows 4295 // the user-defined signal handler to perform checks either before or after 4296 // the VM performs its own checks. Naturally, the user code would be making 4297 // a serious error if it tried to handle an exception (such as a null check 4298 // or breakpoint) that the VM was generating for its own correct operation. 4299 // 4300 // This routine may recognize any of the following kinds of signals: 4301 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4302 // os::Solaris::SIGasync 4303 // It should be consulted by handlers for any of those signals. 4304 // It explicitly does not recognize os::Solaris::SIGinterrupt 4305 // 4306 // The caller of this routine must pass in the three arguments supplied 4307 // to the function referred to in the "sa_sigaction" (not the "sa_handler") 4308 // field of the structure passed to sigaction(). This routine assumes that 4309 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4310 // 4311 // Note that the VM will print warnings if it detects conflicting signal 4312 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4313 // 4314 extern "C" JNIEXPORT int 4315 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 4316 int abort_if_unrecognized); 4317 4318 4319 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4320 int orig_errno = errno; // Preserve errno value over signal handler. 4321 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4322 errno = orig_errno; 4323 } 4324 4325 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4326 is needed to provoke threads blocked on IO to return an EINTR 4327 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4328 does NOT participate in signal chaining due to requirement for 4329 NOT setting SA_RESTART to make EINTR work. */ 4330 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4331 if (UseSignalChaining) { 4332 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4333 if (actp && actp->sa_handler) { 4334 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4335 } 4336 } 4337 } 4338 4339 // This boolean allows users to forward their own non-matching signals 4340 // to JVM_handle_solaris_signal, harmlessly. 4341 bool os::Solaris::signal_handlers_are_installed = false; 4342 4343 // For signal-chaining 4344 bool os::Solaris::libjsig_is_loaded = false; 4345 typedef struct sigaction *(*get_signal_t)(int); 4346 get_signal_t os::Solaris::get_signal_action = NULL; 4347 4348 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4349 struct sigaction *actp = NULL; 4350 4351 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4352 // Retrieve the old signal handler from libjsig 4353 actp = (*get_signal_action)(sig); 4354 } 4355 if (actp == NULL) { 4356 // Retrieve the preinstalled signal handler from jvm 4357 actp = get_preinstalled_handler(sig); 4358 } 4359 4360 return actp; 4361 } 4362 4363 static bool call_chained_handler(struct sigaction *actp, int sig, 4364 siginfo_t *siginfo, void *context) { 4365 // Call the old signal handler 4366 if (actp->sa_handler == SIG_DFL) { 4367 // It's more reasonable to let jvm treat it as an unexpected exception 4368 // instead of taking the default action. 4369 return false; 4370 } else if (actp->sa_handler != SIG_IGN) { 4371 if ((actp->sa_flags & SA_NODEFER) == 0) { 4372 // automaticlly block the signal 4373 sigaddset(&(actp->sa_mask), sig); 4374 } 4375 4376 sa_handler_t hand; 4377 sa_sigaction_t sa; 4378 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4379 // retrieve the chained handler 4380 if (siginfo_flag_set) { 4381 sa = actp->sa_sigaction; 4382 } else { 4383 hand = actp->sa_handler; 4384 } 4385 4386 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4387 actp->sa_handler = SIG_DFL; 4388 } 4389 4390 // try to honor the signal mask 4391 sigset_t oset; 4392 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4393 4394 // call into the chained handler 4395 if (siginfo_flag_set) { 4396 (*sa)(sig, siginfo, context); 4397 } else { 4398 (*hand)(sig); 4399 } 4400 4401 // restore the signal mask 4402 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4403 } 4404 // Tell jvm's signal handler the signal is taken care of. 4405 return true; 4406 } 4407 4408 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4409 bool chained = false; 4410 // signal-chaining 4411 if (UseSignalChaining) { 4412 struct sigaction *actp = get_chained_signal_action(sig); 4413 if (actp != NULL) { 4414 chained = call_chained_handler(actp, sig, siginfo, context); 4415 } 4416 } 4417 return chained; 4418 } 4419 4420 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4421 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4422 if (preinstalled_sigs[sig] != 0) { 4423 return &chainedsigactions[sig]; 4424 } 4425 return NULL; 4426 } 4427 4428 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4429 4430 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4431 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4432 chainedsigactions[sig] = oldAct; 4433 preinstalled_sigs[sig] = 1; 4434 } 4435 4436 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4437 // Check for overwrite. 4438 struct sigaction oldAct; 4439 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4440 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4441 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4442 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4443 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4444 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4445 if (AllowUserSignalHandlers || !set_installed) { 4446 // Do not overwrite; user takes responsibility to forward to us. 4447 return; 4448 } else if (UseSignalChaining) { 4449 if (oktochain) { 4450 // save the old handler in jvm 4451 save_preinstalled_handler(sig, oldAct); 4452 } else { 4453 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4454 } 4455 // libjsig also interposes the sigaction() call below and saves the 4456 // old sigaction on it own. 4457 } else { 4458 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4459 "%#lx for signal %d.", (long)oldhand, sig)); 4460 } 4461 } 4462 4463 struct sigaction sigAct; 4464 sigfillset(&(sigAct.sa_mask)); 4465 sigAct.sa_handler = SIG_DFL; 4466 4467 sigAct.sa_sigaction = signalHandler; 4468 // Handle SIGSEGV on alternate signal stack if 4469 // not using stack banging 4470 if (!UseStackBanging && sig == SIGSEGV) { 4471 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4472 // Interruptible i/o requires SA_RESTART cleared so EINTR 4473 // is returned instead of restarting system calls 4474 } else if (sig == os::Solaris::SIGinterrupt()) { 4475 sigemptyset(&sigAct.sa_mask); 4476 sigAct.sa_handler = NULL; 4477 sigAct.sa_flags = SA_SIGINFO; 4478 sigAct.sa_sigaction = sigINTRHandler; 4479 } else { 4480 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4481 } 4482 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4483 4484 sigaction(sig, &sigAct, &oldAct); 4485 4486 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4487 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4488 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4489 } 4490 4491 4492 #define DO_SIGNAL_CHECK(sig) \ 4493 if (!sigismember(&check_signal_done, sig)) \ 4494 os::Solaris::check_signal_handler(sig) 4495 4496 // This method is a periodic task to check for misbehaving JNI applications 4497 // under CheckJNI, we can add any periodic checks here 4498 4499 void os::run_periodic_checks() { 4500 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4501 // thereby preventing a NULL checks. 4502 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4503 4504 if (check_signals == false) return; 4505 4506 // SEGV and BUS if overridden could potentially prevent 4507 // generation of hs*.log in the event of a crash, debugging 4508 // such a case can be very challenging, so we absolutely 4509 // check for the following for a good measure: 4510 DO_SIGNAL_CHECK(SIGSEGV); 4511 DO_SIGNAL_CHECK(SIGILL); 4512 DO_SIGNAL_CHECK(SIGFPE); 4513 DO_SIGNAL_CHECK(SIGBUS); 4514 DO_SIGNAL_CHECK(SIGPIPE); 4515 DO_SIGNAL_CHECK(SIGXFSZ); 4516 4517 // ReduceSignalUsage allows the user to override these handlers 4518 // see comments at the very top and jvm_solaris.h 4519 if (!ReduceSignalUsage) { 4520 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4521 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4522 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4523 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4524 } 4525 4526 // See comments above for using JVM1/JVM2 and UseAltSigs 4527 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4528 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4529 4530 } 4531 4532 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4533 4534 static os_sigaction_t os_sigaction = NULL; 4535 4536 void os::Solaris::check_signal_handler(int sig) { 4537 char buf[O_BUFLEN]; 4538 address jvmHandler = NULL; 4539 4540 struct sigaction act; 4541 if (os_sigaction == NULL) { 4542 // only trust the default sigaction, in case it has been interposed 4543 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4544 if (os_sigaction == NULL) return; 4545 } 4546 4547 os_sigaction(sig, (struct sigaction*)NULL, &act); 4548 4549 address thisHandler = (act.sa_flags & SA_SIGINFO) 4550 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4551 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4552 4553 4554 switch(sig) { 4555 case SIGSEGV: 4556 case SIGBUS: 4557 case SIGFPE: 4558 case SIGPIPE: 4559 case SIGXFSZ: 4560 case SIGILL: 4561 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4562 break; 4563 4564 case SHUTDOWN1_SIGNAL: 4565 case SHUTDOWN2_SIGNAL: 4566 case SHUTDOWN3_SIGNAL: 4567 case BREAK_SIGNAL: 4568 jvmHandler = (address)user_handler(); 4569 break; 4570 4571 default: 4572 int intrsig = os::Solaris::SIGinterrupt(); 4573 int asynsig = os::Solaris::SIGasync(); 4574 4575 if (sig == intrsig) { 4576 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4577 } else if (sig == asynsig) { 4578 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4579 } else { 4580 return; 4581 } 4582 break; 4583 } 4584 4585 4586 if (thisHandler != jvmHandler) { 4587 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4588 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4589 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4590 // No need to check this sig any longer 4591 sigaddset(&check_signal_done, sig); 4592 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4593 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4594 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4595 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4596 // No need to check this sig any longer 4597 sigaddset(&check_signal_done, sig); 4598 } 4599 4600 // Print all the signal handler state 4601 if (sigismember(&check_signal_done, sig)) { 4602 print_signal_handlers(tty, buf, O_BUFLEN); 4603 } 4604 4605 } 4606 4607 void os::Solaris::install_signal_handlers() { 4608 bool libjsigdone = false; 4609 signal_handlers_are_installed = true; 4610 4611 // signal-chaining 4612 typedef void (*signal_setting_t)(); 4613 signal_setting_t begin_signal_setting = NULL; 4614 signal_setting_t end_signal_setting = NULL; 4615 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4616 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4617 if (begin_signal_setting != NULL) { 4618 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4619 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4620 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4621 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4622 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4623 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4624 libjsig_is_loaded = true; 4625 if (os::Solaris::get_libjsig_version != NULL) { 4626 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4627 } 4628 assert(UseSignalChaining, "should enable signal-chaining"); 4629 } 4630 if (libjsig_is_loaded) { 4631 // Tell libjsig jvm is setting signal handlers 4632 (*begin_signal_setting)(); 4633 } 4634 4635 set_signal_handler(SIGSEGV, true, true); 4636 set_signal_handler(SIGPIPE, true, true); 4637 set_signal_handler(SIGXFSZ, true, true); 4638 set_signal_handler(SIGBUS, true, true); 4639 set_signal_handler(SIGILL, true, true); 4640 set_signal_handler(SIGFPE, true, true); 4641 4642 4643 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4644 4645 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4646 // can not register overridable signals which might be > 32 4647 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4648 // Tell libjsig jvm has finished setting signal handlers 4649 (*end_signal_setting)(); 4650 libjsigdone = true; 4651 } 4652 } 4653 4654 // Never ok to chain our SIGinterrupt 4655 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4656 set_signal_handler(os::Solaris::SIGasync(), true, true); 4657 4658 if (libjsig_is_loaded && !libjsigdone) { 4659 // Tell libjsig jvm finishes setting signal handlers 4660 (*end_signal_setting)(); 4661 } 4662 4663 // We don't activate signal checker if libjsig is in place, we trust ourselves 4664 // and if UserSignalHandler is installed all bets are off. 4665 // Log that signal checking is off only if -verbose:jni is specified. 4666 if (CheckJNICalls) { 4667 if (libjsig_is_loaded) { 4668 if (PrintJNIResolving) { 4669 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4670 } 4671 check_signals = false; 4672 } 4673 if (AllowUserSignalHandlers) { 4674 if (PrintJNIResolving) { 4675 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4676 } 4677 check_signals = false; 4678 } 4679 } 4680 } 4681 4682 4683 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4684 4685 const char * signames[] = { 4686 "SIG0", 4687 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4688 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4689 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4690 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4691 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4692 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4693 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4694 "SIGCANCEL", "SIGLOST" 4695 }; 4696 4697 const char* os::exception_name(int exception_code, char* buf, size_t size) { 4698 if (0 < exception_code && exception_code <= SIGRTMAX) { 4699 // signal 4700 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4701 jio_snprintf(buf, size, "%s", signames[exception_code]); 4702 } else { 4703 jio_snprintf(buf, size, "SIG%d", exception_code); 4704 } 4705 return buf; 4706 } else { 4707 return NULL; 4708 } 4709 } 4710 4711 // (Static) wrappers for the new libthread API 4712 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4713 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4714 int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4715 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4716 int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4717 4718 // (Static) wrapper for getisax(2) call. 4719 os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4720 4721 // (Static) wrappers for the liblgrp API 4722 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4723 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4724 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4725 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4726 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4727 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4728 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4729 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4730 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4731 4732 // (Static) wrapper for meminfo() call. 4733 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4734 4735 static address resolve_symbol_lazy(const char* name) { 4736 address addr = (address) dlsym(RTLD_DEFAULT, name); 4737 if(addr == NULL) { 4738 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4739 addr = (address) dlsym(RTLD_NEXT, name); 4740 } 4741 return addr; 4742 } 4743 4744 static address resolve_symbol(const char* name) { 4745 address addr = resolve_symbol_lazy(name); 4746 if(addr == NULL) { 4747 fatal(dlerror()); 4748 } 4749 return addr; 4750 } 4751 4752 4753 4754 // isT2_libthread() 4755 // 4756 // Routine to determine if we are currently using the new T2 libthread. 4757 // 4758 // We determine if we are using T2 by reading /proc/self/lstatus and 4759 // looking for a thread with the ASLWP bit set. If we find this status 4760 // bit set, we must assume that we are NOT using T2. The T2 team 4761 // has approved this algorithm. 4762 // 4763 // We need to determine if we are running with the new T2 libthread 4764 // since setting native thread priorities is handled differently 4765 // when using this library. All threads created using T2 are bound 4766 // threads. Calling thr_setprio is meaningless in this case. 4767 // 4768 bool isT2_libthread() { 4769 static prheader_t * lwpArray = NULL; 4770 static int lwpSize = 0; 4771 static int lwpFile = -1; 4772 lwpstatus_t * that; 4773 char lwpName [128]; 4774 bool isT2 = false; 4775 4776 #define ADR(x) ((uintptr_t)(x)) 4777 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4778 4779 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4780 if (lwpFile < 0) { 4781 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4782 return false; 4783 } 4784 lwpSize = 16*1024; 4785 for (;;) { 4786 ::lseek64 (lwpFile, 0, SEEK_SET); 4787 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal); 4788 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4789 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4790 break; 4791 } 4792 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4793 // We got a good snapshot - now iterate over the list. 4794 int aslwpcount = 0; 4795 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4796 that = LWPINDEX(lwpArray,i); 4797 if (that->pr_flags & PR_ASLWP) { 4798 aslwpcount++; 4799 } 4800 } 4801 if (aslwpcount == 0) isT2 = true; 4802 break; 4803 } 4804 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4805 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry. 4806 } 4807 4808 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); 4809 ::close (lwpFile); 4810 if (ThreadPriorityVerbose) { 4811 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4812 else tty->print_cr("We are not running with a T2 libthread\n"); 4813 } 4814 return isT2; 4815 } 4816 4817 4818 void os::Solaris::libthread_init() { 4819 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4820 4821 // Determine if we are running with the new T2 libthread 4822 os::Solaris::set_T2_libthread(isT2_libthread()); 4823 4824 lwp_priocntl_init(); 4825 4826 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4827 if(func == NULL) { 4828 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4829 // Guarantee that this VM is running on an new enough OS (5.6 or 4830 // later) that it will have a new enough libthread.so. 4831 guarantee(func != NULL, "libthread.so is too old."); 4832 } 4833 4834 // Initialize the new libthread getstate API wrappers 4835 func = resolve_symbol("thr_getstate"); 4836 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4837 4838 func = resolve_symbol("thr_setstate"); 4839 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4840 4841 func = resolve_symbol("thr_setmutator"); 4842 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4843 4844 func = resolve_symbol("thr_suspend_mutator"); 4845 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4846 4847 func = resolve_symbol("thr_continue_mutator"); 4848 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4849 4850 int size; 4851 void (*handler_info_func)(address *, int *); 4852 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4853 handler_info_func(&handler_start, &size); 4854 handler_end = handler_start + size; 4855 } 4856 4857 4858 int_fnP_mutex_tP os::Solaris::_mutex_lock; 4859 int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4860 int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4861 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4862 int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4863 int os::Solaris::_mutex_scope = USYNC_THREAD; 4864 4865 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4866 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4867 int_fnP_cond_tP os::Solaris::_cond_signal; 4868 int_fnP_cond_tP os::Solaris::_cond_broadcast; 4869 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4870 int_fnP_cond_tP os::Solaris::_cond_destroy; 4871 int os::Solaris::_cond_scope = USYNC_THREAD; 4872 4873 void os::Solaris::synchronization_init() { 4874 if(UseLWPSynchronization) { 4875 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4876 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4877 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4878 os::Solaris::set_mutex_init(lwp_mutex_init); 4879 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4880 os::Solaris::set_mutex_scope(USYNC_THREAD); 4881 4882 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4883 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4884 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4885 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4886 os::Solaris::set_cond_init(lwp_cond_init); 4887 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4888 os::Solaris::set_cond_scope(USYNC_THREAD); 4889 } 4890 else { 4891 os::Solaris::set_mutex_scope(USYNC_THREAD); 4892 os::Solaris::set_cond_scope(USYNC_THREAD); 4893 4894 if(UsePthreads) { 4895 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4896 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4897 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4898 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4899 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4900 4901 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4902 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4903 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4904 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4905 os::Solaris::set_cond_init(pthread_cond_default_init); 4906 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4907 } 4908 else { 4909 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4910 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4911 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4912 os::Solaris::set_mutex_init(::mutex_init); 4913 os::Solaris::set_mutex_destroy(::mutex_destroy); 4914 4915 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4916 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4917 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4918 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4919 os::Solaris::set_cond_init(::cond_init); 4920 os::Solaris::set_cond_destroy(::cond_destroy); 4921 } 4922 } 4923 } 4924 4925 bool os::Solaris::liblgrp_init() { 4926 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4927 if (handle != NULL) { 4928 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4929 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4930 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4931 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4932 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4933 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4934 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4935 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4936 dlsym(handle, "lgrp_cookie_stale"))); 4937 4938 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4939 set_lgrp_cookie(c); 4940 return true; 4941 } 4942 return false; 4943 } 4944 4945 void os::Solaris::misc_sym_init() { 4946 address func; 4947 4948 // getisax 4949 func = resolve_symbol_lazy("getisax"); 4950 if (func != NULL) { 4951 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4952 } 4953 4954 // meminfo 4955 func = resolve_symbol_lazy("meminfo"); 4956 if (func != NULL) { 4957 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4958 } 4959 } 4960 4961 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4962 assert(_getisax != NULL, "_getisax not set"); 4963 return _getisax(array, n); 4964 } 4965 4966 // Symbol doesn't exist in Solaris 8 pset.h 4967 #ifndef PS_MYID 4968 #define PS_MYID -3 4969 #endif 4970 4971 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4972 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4973 static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4974 4975 void init_pset_getloadavg_ptr(void) { 4976 pset_getloadavg_ptr = 4977 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4978 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4979 warning("pset_getloadavg function not found"); 4980 } 4981 } 4982 4983 int os::Solaris::_dev_zero_fd = -1; 4984 4985 // this is called _before_ the global arguments have been parsed 4986 void os::init(void) { 4987 _initial_pid = getpid(); 4988 4989 max_hrtime = first_hrtime = gethrtime(); 4990 4991 init_random(1234567); 4992 4993 page_size = sysconf(_SC_PAGESIZE); 4994 if (page_size == -1) 4995 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4996 strerror(errno))); 4997 init_page_sizes((size_t) page_size); 4998 4999 Solaris::initialize_system_info(); 5000 5001 // Initialize misc. symbols as soon as possible, so we can use them 5002 // if we need them. 5003 Solaris::misc_sym_init(); 5004 5005 int fd = ::open("/dev/zero", O_RDWR); 5006 if (fd < 0) { 5007 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 5008 } else { 5009 Solaris::set_dev_zero_fd(fd); 5010 5011 // Close on exec, child won't inherit. 5012 fcntl(fd, F_SETFD, FD_CLOEXEC); 5013 } 5014 5015 clock_tics_per_sec = CLK_TCK; 5016 5017 // check if dladdr1() exists; dladdr1 can provide more information than 5018 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 5019 // and is available on linker patches for 5.7 and 5.8. 5020 // libdl.so must have been loaded, this call is just an entry lookup 5021 void * hdl = dlopen("libdl.so", RTLD_NOW); 5022 if (hdl) 5023 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 5024 5025 // (Solaris only) this switches to calls that actually do locking. 5026 ThreadCritical::initialize(); 5027 5028 main_thread = thr_self(); 5029 5030 // Constant minimum stack size allowed. It must be at least 5031 // the minimum of what the OS supports (thr_min_stack()), and 5032 // enough to allow the thread to get to user bytecode execution. 5033 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 5034 // If the pagesize of the VM is greater than 8K determine the appropriate 5035 // number of initial guard pages. The user can change this with the 5036 // command line arguments, if needed. 5037 if (vm_page_size() > 8*K) { 5038 StackYellowPages = 1; 5039 StackRedPages = 1; 5040 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 5041 } 5042 } 5043 5044 // To install functions for atexit system call 5045 extern "C" { 5046 static void perfMemory_exit_helper() { 5047 perfMemory_exit(); 5048 } 5049 } 5050 5051 // this is called _after_ the global arguments have been parsed 5052 jint os::init_2(void) { 5053 // try to enable extended file IO ASAP, see 6431278 5054 os::Solaris::try_enable_extended_io(); 5055 5056 // Allocate a single page and mark it as readable for safepoint polling. Also 5057 // use this first mmap call to check support for MAP_ALIGN. 5058 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 5059 page_size, 5060 MAP_PRIVATE | MAP_ALIGN, 5061 PROT_READ); 5062 if (polling_page == NULL) { 5063 has_map_align = false; 5064 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 5065 PROT_READ); 5066 } 5067 5068 os::set_polling_page(polling_page); 5069 5070 #ifndef PRODUCT 5071 if( Verbose && PrintMiscellaneous ) 5072 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 5073 #endif 5074 5075 if (!UseMembar) { 5076 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 5077 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 5078 os::set_memory_serialize_page( mem_serialize_page ); 5079 5080 #ifndef PRODUCT 5081 if(Verbose && PrintMiscellaneous) 5082 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 5083 #endif 5084 } 5085 5086 os::large_page_init(); 5087 5088 // Check minimum allowable stack size for thread creation and to initialize 5089 // the java system classes, including StackOverflowError - depends on page 5090 // size. Add a page for compiler2 recursion in main thread. 5091 // Add in 2*BytesPerWord times page size to account for VM stack during 5092 // class initialization depending on 32 or 64 bit VM. 5093 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 5094 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5095 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5096 5097 size_t threadStackSizeInBytes = ThreadStackSize * K; 5098 if (threadStackSizeInBytes != 0 && 5099 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5100 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5101 os::Solaris::min_stack_allowed/K); 5102 return JNI_ERR; 5103 } 5104 5105 // For 64kbps there will be a 64kb page size, which makes 5106 // the usable default stack size quite a bit less. Increase the 5107 // stack for 64kb (or any > than 8kb) pages, this increases 5108 // virtual memory fragmentation (since we're not creating the 5109 // stack on a power of 2 boundary. The real fix for this 5110 // should be to fix the guard page mechanism. 5111 5112 if (vm_page_size() > 8*K) { 5113 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5114 ? threadStackSizeInBytes + 5115 ((StackYellowPages + StackRedPages) * vm_page_size()) 5116 : 0; 5117 ThreadStackSize = threadStackSizeInBytes/K; 5118 } 5119 5120 // Make the stack size a multiple of the page size so that 5121 // the yellow/red zones can be guarded. 5122 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5123 vm_page_size())); 5124 5125 Solaris::libthread_init(); 5126 5127 if (UseNUMA) { 5128 if (!Solaris::liblgrp_init()) { 5129 UseNUMA = false; 5130 } else { 5131 size_t lgrp_limit = os::numa_get_groups_num(); 5132 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 5133 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5134 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 5135 if (lgrp_num < 2) { 5136 // There's only one locality group, disable NUMA. 5137 UseNUMA = false; 5138 } 5139 } 5140 // ISM is not compatible with the NUMA allocator - it always allocates 5141 // pages round-robin across the lgroups. 5142 if (UseNUMA && UseLargePages && UseISM) { 5143 if (!FLAG_IS_DEFAULT(UseNUMA)) { 5144 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) { 5145 UseLargePages = false; 5146 } else { 5147 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator"); 5148 UseNUMA = false; 5149 } 5150 } else { 5151 UseNUMA = false; 5152 } 5153 } 5154 if (!UseNUMA && ForceNUMA) { 5155 UseNUMA = true; 5156 } 5157 } 5158 5159 Solaris::signal_sets_init(); 5160 Solaris::init_signal_mem(); 5161 Solaris::install_signal_handlers(); 5162 5163 if (libjsigversion < JSIG_VERSION_1_4_1) { 5164 Maxlibjsigsigs = OLDMAXSIGNUM; 5165 } 5166 5167 // initialize synchronization primitives to use either thread or 5168 // lwp synchronization (controlled by UseLWPSynchronization) 5169 Solaris::synchronization_init(); 5170 5171 if (MaxFDLimit) { 5172 // set the number of file descriptors to max. print out error 5173 // if getrlimit/setrlimit fails but continue regardless. 5174 struct rlimit nbr_files; 5175 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5176 if (status != 0) { 5177 if (PrintMiscellaneous && (Verbose || WizardMode)) 5178 perror("os::init_2 getrlimit failed"); 5179 } else { 5180 nbr_files.rlim_cur = nbr_files.rlim_max; 5181 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5182 if (status != 0) { 5183 if (PrintMiscellaneous && (Verbose || WizardMode)) 5184 perror("os::init_2 setrlimit failed"); 5185 } 5186 } 5187 } 5188 5189 // Calculate theoretical max. size of Threads to guard gainst 5190 // artifical out-of-memory situations, where all available address- 5191 // space has been reserved by thread stacks. Default stack size is 1Mb. 5192 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5193 JavaThread::stack_size_at_create() : (1*K*K); 5194 assert(pre_thread_stack_size != 0, "Must have a stack"); 5195 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5196 // we should start doing Virtual Memory banging. Currently when the threads will 5197 // have used all but 200Mb of space. 5198 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5199 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5200 5201 // at-exit methods are called in the reverse order of their registration. 5202 // In Solaris 7 and earlier, atexit functions are called on return from 5203 // main or as a result of a call to exit(3C). There can be only 32 of 5204 // these functions registered and atexit() does not set errno. In Solaris 5205 // 8 and later, there is no limit to the number of functions registered 5206 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5207 // functions are called upon dlclose(3DL) in addition to return from main 5208 // and exit(3C). 5209 5210 if (PerfAllowAtExitRegistration) { 5211 // only register atexit functions if PerfAllowAtExitRegistration is set. 5212 // atexit functions can be delayed until process exit time, which 5213 // can be problematic for embedded VM situations. Embedded VMs should 5214 // call DestroyJavaVM() to assure that VM resources are released. 5215 5216 // note: perfMemory_exit_helper atexit function may be removed in 5217 // the future if the appropriate cleanup code can be added to the 5218 // VM_Exit VMOperation's doit method. 5219 if (atexit(perfMemory_exit_helper) != 0) { 5220 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5221 } 5222 } 5223 5224 // Init pset_loadavg function pointer 5225 init_pset_getloadavg_ptr(); 5226 5227 return JNI_OK; 5228 } 5229 5230 void os::init_3(void) { 5231 return; 5232 } 5233 5234 // Mark the polling page as unreadable 5235 void os::make_polling_page_unreadable(void) { 5236 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5237 fatal("Could not disable polling page"); 5238 }; 5239 5240 // Mark the polling page as readable 5241 void os::make_polling_page_readable(void) { 5242 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5243 fatal("Could not enable polling page"); 5244 }; 5245 5246 // OS interface. 5247 5248 bool os::check_heap(bool force) { return true; } 5249 5250 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5251 static vsnprintf_t sol_vsnprintf = NULL; 5252 5253 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5254 if (!sol_vsnprintf) { 5255 //search for the named symbol in the objects that were loaded after libjvm 5256 void* where = RTLD_NEXT; 5257 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5258 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5259 if (!sol_vsnprintf){ 5260 //search for the named symbol in the objects that were loaded before libjvm 5261 where = RTLD_DEFAULT; 5262 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5263 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5264 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5265 } 5266 } 5267 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5268 } 5269 5270 5271 // Is a (classpath) directory empty? 5272 bool os::dir_is_empty(const char* path) { 5273 DIR *dir = NULL; 5274 struct dirent *ptr; 5275 5276 dir = opendir(path); 5277 if (dir == NULL) return true; 5278 5279 /* Scan the directory */ 5280 bool result = true; 5281 char buf[sizeof(struct dirent) + MAX_PATH]; 5282 struct dirent *dbuf = (struct dirent *) buf; 5283 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5284 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5285 result = false; 5286 } 5287 } 5288 closedir(dir); 5289 return result; 5290 } 5291 5292 // This code originates from JDK's sysOpen and open64_w 5293 // from src/solaris/hpi/src/system_md.c 5294 5295 #ifndef O_DELETE 5296 #define O_DELETE 0x10000 5297 #endif 5298 5299 // Open a file. Unlink the file immediately after open returns 5300 // if the specified oflag has the O_DELETE flag set. 5301 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5302 5303 int os::open(const char *path, int oflag, int mode) { 5304 if (strlen(path) > MAX_PATH - 1) { 5305 errno = ENAMETOOLONG; 5306 return -1; 5307 } 5308 int fd; 5309 int o_delete = (oflag & O_DELETE); 5310 oflag = oflag & ~O_DELETE; 5311 5312 fd = ::open64(path, oflag, mode); 5313 if (fd == -1) return -1; 5314 5315 //If the open succeeded, the file might still be a directory 5316 { 5317 struct stat64 buf64; 5318 int ret = ::fstat64(fd, &buf64); 5319 int st_mode = buf64.st_mode; 5320 5321 if (ret != -1) { 5322 if ((st_mode & S_IFMT) == S_IFDIR) { 5323 errno = EISDIR; 5324 ::close(fd); 5325 return -1; 5326 } 5327 } else { 5328 ::close(fd); 5329 return -1; 5330 } 5331 } 5332 /* 5333 * 32-bit Solaris systems suffer from: 5334 * 5335 * - an historical default soft limit of 256 per-process file 5336 * descriptors that is too low for many Java programs. 5337 * 5338 * - a design flaw where file descriptors created using stdio 5339 * fopen must be less than 256, _even_ when the first limit above 5340 * has been raised. This can cause calls to fopen (but not calls to 5341 * open, for example) to fail mysteriously, perhaps in 3rd party 5342 * native code (although the JDK itself uses fopen). One can hardly 5343 * criticize them for using this most standard of all functions. 5344 * 5345 * We attempt to make everything work anyways by: 5346 * 5347 * - raising the soft limit on per-process file descriptors beyond 5348 * 256 5349 * 5350 * - As of Solaris 10u4, we can request that Solaris raise the 256 5351 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5352 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5353 * 5354 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5355 * workaround the bug by remapping non-stdio file descriptors below 5356 * 256 to ones beyond 256, which is done below. 5357 * 5358 * See: 5359 * 1085341: 32-bit stdio routines should support file descriptors >255 5360 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5361 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5362 * enable_extended_FILE_stdio() in VM initialisation 5363 * Giri Mandalika's blog 5364 * http://technopark02.blogspot.com/2005_05_01_archive.html 5365 */ 5366 #ifndef _LP64 5367 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5368 int newfd = ::fcntl(fd, F_DUPFD, 256); 5369 if (newfd != -1) { 5370 ::close(fd); 5371 fd = newfd; 5372 } 5373 } 5374 #endif // 32-bit Solaris 5375 /* 5376 * All file descriptors that are opened in the JVM and not 5377 * specifically destined for a subprocess should have the 5378 * close-on-exec flag set. If we don't set it, then careless 3rd 5379 * party native code might fork and exec without closing all 5380 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5381 * UNIXProcess.c), and this in turn might: 5382 * 5383 * - cause end-of-file to fail to be detected on some file 5384 * descriptors, resulting in mysterious hangs, or 5385 * 5386 * - might cause an fopen in the subprocess to fail on a system 5387 * suffering from bug 1085341. 5388 * 5389 * (Yes, the default setting of the close-on-exec flag is a Unix 5390 * design flaw) 5391 * 5392 * See: 5393 * 1085341: 32-bit stdio routines should support file descriptors >255 5394 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5395 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5396 */ 5397 #ifdef FD_CLOEXEC 5398 { 5399 int flags = ::fcntl(fd, F_GETFD); 5400 if (flags != -1) 5401 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5402 } 5403 #endif 5404 5405 if (o_delete != 0) { 5406 ::unlink(path); 5407 } 5408 return fd; 5409 } 5410 5411 // create binary file, rewriting existing file if required 5412 int os::create_binary_file(const char* path, bool rewrite_existing) { 5413 int oflags = O_WRONLY | O_CREAT; 5414 if (!rewrite_existing) { 5415 oflags |= O_EXCL; 5416 } 5417 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5418 } 5419 5420 // return current position of file pointer 5421 jlong os::current_file_offset(int fd) { 5422 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5423 } 5424 5425 // move file pointer to the specified offset 5426 jlong os::seek_to_file_offset(int fd, jlong offset) { 5427 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5428 } 5429 5430 jlong os::lseek(int fd, jlong offset, int whence) { 5431 return (jlong) ::lseek64(fd, offset, whence); 5432 } 5433 5434 char * os::native_path(char *path) { 5435 return path; 5436 } 5437 5438 int os::ftruncate(int fd, jlong length) { 5439 return ::ftruncate64(fd, length); 5440 } 5441 5442 int os::fsync(int fd) { 5443 RESTARTABLE_RETURN_INT(::fsync(fd)); 5444 } 5445 5446 int os::available(int fd, jlong *bytes) { 5447 jlong cur, end; 5448 int mode; 5449 struct stat64 buf64; 5450 5451 if (::fstat64(fd, &buf64) >= 0) { 5452 mode = buf64.st_mode; 5453 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5454 /* 5455 * XXX: is the following call interruptible? If so, this might 5456 * need to go through the INTERRUPT_IO() wrapper as for other 5457 * blocking, interruptible calls in this file. 5458 */ 5459 int n,ioctl_return; 5460 5461 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5462 if (ioctl_return>= 0) { 5463 *bytes = n; 5464 return 1; 5465 } 5466 } 5467 } 5468 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5469 return 0; 5470 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5471 return 0; 5472 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5473 return 0; 5474 } 5475 *bytes = end - cur; 5476 return 1; 5477 } 5478 5479 // Map a block of memory. 5480 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 5481 char *addr, size_t bytes, bool read_only, 5482 bool allow_exec) { 5483 int prot; 5484 int flags; 5485 5486 if (read_only) { 5487 prot = PROT_READ; 5488 flags = MAP_SHARED; 5489 } else { 5490 prot = PROT_READ | PROT_WRITE; 5491 flags = MAP_PRIVATE; 5492 } 5493 5494 if (allow_exec) { 5495 prot |= PROT_EXEC; 5496 } 5497 5498 if (addr != NULL) { 5499 flags |= MAP_FIXED; 5500 } 5501 5502 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5503 fd, file_offset); 5504 if (mapped_address == MAP_FAILED) { 5505 return NULL; 5506 } 5507 return mapped_address; 5508 } 5509 5510 5511 // Remap a block of memory. 5512 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5513 char *addr, size_t bytes, bool read_only, 5514 bool allow_exec) { 5515 // same as map_memory() on this OS 5516 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5517 allow_exec); 5518 } 5519 5520 5521 // Unmap a block of memory. 5522 bool os::pd_unmap_memory(char* addr, size_t bytes) { 5523 return munmap(addr, bytes) == 0; 5524 } 5525 5526 void os::pause() { 5527 char filename[MAX_PATH]; 5528 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5529 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5530 } else { 5531 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5532 } 5533 5534 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5535 if (fd != -1) { 5536 struct stat buf; 5537 ::close(fd); 5538 while (::stat(filename, &buf) == 0) { 5539 (void)::poll(NULL, 0, 100); 5540 } 5541 } else { 5542 jio_fprintf(stderr, 5543 "Could not open pause file '%s', continuing immediately.\n", filename); 5544 } 5545 } 5546 5547 #ifndef PRODUCT 5548 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5549 // Turn this on if you need to trace synch operations. 5550 // Set RECORD_SYNCH_LIMIT to a large-enough value, 5551 // and call record_synch_enable and record_synch_disable 5552 // around the computation of interest. 5553 5554 void record_synch(char* name, bool returning); // defined below 5555 5556 class RecordSynch { 5557 char* _name; 5558 public: 5559 RecordSynch(char* name) :_name(name) 5560 { record_synch(_name, false); } 5561 ~RecordSynch() { record_synch(_name, true); } 5562 }; 5563 5564 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5565 extern "C" ret name params { \ 5566 typedef ret name##_t params; \ 5567 static name##_t* implem = NULL; \ 5568 static int callcount = 0; \ 5569 if (implem == NULL) { \ 5570 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5571 if (implem == NULL) fatal(dlerror()); \ 5572 } \ 5573 ++callcount; \ 5574 RecordSynch _rs(#name); \ 5575 inner; \ 5576 return implem args; \ 5577 } 5578 // in dbx, examine callcounts this way: 5579 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5580 5581 #define CHECK_POINTER_OK(p) \ 5582 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5583 #define CHECK_MU \ 5584 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5585 #define CHECK_CV \ 5586 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5587 #define CHECK_P(p) \ 5588 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5589 5590 #define CHECK_MUTEX(mutex_op) \ 5591 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5592 5593 CHECK_MUTEX( mutex_lock) 5594 CHECK_MUTEX( _mutex_lock) 5595 CHECK_MUTEX( mutex_unlock) 5596 CHECK_MUTEX(_mutex_unlock) 5597 CHECK_MUTEX( mutex_trylock) 5598 CHECK_MUTEX(_mutex_trylock) 5599 5600 #define CHECK_COND(cond_op) \ 5601 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5602 5603 CHECK_COND( cond_wait); 5604 CHECK_COND(_cond_wait); 5605 CHECK_COND(_cond_wait_cancel); 5606 5607 #define CHECK_COND2(cond_op) \ 5608 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5609 5610 CHECK_COND2( cond_timedwait); 5611 CHECK_COND2(_cond_timedwait); 5612 CHECK_COND2(_cond_timedwait_cancel); 5613 5614 // do the _lwp_* versions too 5615 #define mutex_t lwp_mutex_t 5616 #define cond_t lwp_cond_t 5617 CHECK_MUTEX( _lwp_mutex_lock) 5618 CHECK_MUTEX( _lwp_mutex_unlock) 5619 CHECK_MUTEX( _lwp_mutex_trylock) 5620 CHECK_MUTEX( __lwp_mutex_lock) 5621 CHECK_MUTEX( __lwp_mutex_unlock) 5622 CHECK_MUTEX( __lwp_mutex_trylock) 5623 CHECK_MUTEX(___lwp_mutex_lock) 5624 CHECK_MUTEX(___lwp_mutex_unlock) 5625 5626 CHECK_COND( _lwp_cond_wait); 5627 CHECK_COND( __lwp_cond_wait); 5628 CHECK_COND(___lwp_cond_wait); 5629 5630 CHECK_COND2( _lwp_cond_timedwait); 5631 CHECK_COND2( __lwp_cond_timedwait); 5632 #undef mutex_t 5633 #undef cond_t 5634 5635 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5636 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5637 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5638 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5639 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5640 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5641 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5642 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5643 5644 5645 // recording machinery: 5646 5647 enum { RECORD_SYNCH_LIMIT = 200 }; 5648 char* record_synch_name[RECORD_SYNCH_LIMIT]; 5649 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5650 bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5651 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5652 int record_synch_count = 0; 5653 bool record_synch_enabled = false; 5654 5655 // in dbx, examine recorded data this way: 5656 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5657 5658 void record_synch(char* name, bool returning) { 5659 if (record_synch_enabled) { 5660 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5661 record_synch_name[record_synch_count] = name; 5662 record_synch_returning[record_synch_count] = returning; 5663 record_synch_thread[record_synch_count] = thr_self(); 5664 record_synch_arg0ptr[record_synch_count] = &name; 5665 record_synch_count++; 5666 } 5667 // put more checking code here: 5668 // ... 5669 } 5670 } 5671 5672 void record_synch_enable() { 5673 // start collecting trace data, if not already doing so 5674 if (!record_synch_enabled) record_synch_count = 0; 5675 record_synch_enabled = true; 5676 } 5677 5678 void record_synch_disable() { 5679 // stop collecting trace data 5680 record_synch_enabled = false; 5681 } 5682 5683 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5684 #endif // PRODUCT 5685 5686 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5687 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5688 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5689 5690 5691 // JVMTI & JVM monitoring and management support 5692 // The thread_cpu_time() and current_thread_cpu_time() are only 5693 // supported if is_thread_cpu_time_supported() returns true. 5694 // They are not supported on Solaris T1. 5695 5696 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5697 // are used by JVM M&M and JVMTI to get user+sys or user CPU time 5698 // of a thread. 5699 // 5700 // current_thread_cpu_time() and thread_cpu_time(Thread *) 5701 // returns the fast estimate available on the platform. 5702 5703 // hrtime_t gethrvtime() return value includes 5704 // user time but does not include system time 5705 jlong os::current_thread_cpu_time() { 5706 return (jlong) gethrvtime(); 5707 } 5708 5709 jlong os::thread_cpu_time(Thread *thread) { 5710 // return user level CPU time only to be consistent with 5711 // what current_thread_cpu_time returns. 5712 // thread_cpu_time_info() must be changed if this changes 5713 return os::thread_cpu_time(thread, false /* user time only */); 5714 } 5715 5716 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5717 if (user_sys_cpu_time) { 5718 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5719 } else { 5720 return os::current_thread_cpu_time(); 5721 } 5722 } 5723 5724 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5725 char proc_name[64]; 5726 int count; 5727 prusage_t prusage; 5728 jlong lwp_time; 5729 int fd; 5730 5731 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5732 getpid(), 5733 thread->osthread()->lwp_id()); 5734 fd = ::open(proc_name, O_RDONLY); 5735 if ( fd == -1 ) return -1; 5736 5737 do { 5738 count = ::pread(fd, 5739 (void *)&prusage.pr_utime, 5740 thr_time_size, 5741 thr_time_off); 5742 } while (count < 0 && errno == EINTR); 5743 ::close(fd); 5744 if ( count < 0 ) return -1; 5745 5746 if (user_sys_cpu_time) { 5747 // user + system CPU time 5748 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5749 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5750 (jlong)prusage.pr_stime.tv_nsec + 5751 (jlong)prusage.pr_utime.tv_nsec; 5752 } else { 5753 // user level CPU time only 5754 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5755 (jlong)prusage.pr_utime.tv_nsec; 5756 } 5757 5758 return(lwp_time); 5759 } 5760 5761 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5762 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5763 info_ptr->may_skip_backward = false; // elapsed time not wall time 5764 info_ptr->may_skip_forward = false; // elapsed time not wall time 5765 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5766 } 5767 5768 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5769 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5770 info_ptr->may_skip_backward = false; // elapsed time not wall time 5771 info_ptr->may_skip_forward = false; // elapsed time not wall time 5772 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5773 } 5774 5775 bool os::is_thread_cpu_time_supported() { 5776 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5777 return true; 5778 } else { 5779 return false; 5780 } 5781 } 5782 5783 // System loadavg support. Returns -1 if load average cannot be obtained. 5784 // Return the load average for our processor set if the primitive exists 5785 // (Solaris 9 and later). Otherwise just return system wide loadavg. 5786 int os::loadavg(double loadavg[], int nelem) { 5787 if (pset_getloadavg_ptr != NULL) { 5788 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5789 } else { 5790 return ::getloadavg(loadavg, nelem); 5791 } 5792 } 5793 5794 //--------------------------------------------------------------------------------- 5795 5796 static address same_page(address x, address y) { 5797 intptr_t page_bits = -os::vm_page_size(); 5798 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5799 return x; 5800 else if (x > y) 5801 return (address)(intptr_t(y) | ~page_bits) + 1; 5802 else 5803 return (address)(intptr_t(y) & page_bits); 5804 } 5805 5806 bool os::find(address addr, outputStream* st) { 5807 Dl_info dlinfo; 5808 memset(&dlinfo, 0, sizeof(dlinfo)); 5809 if (dladdr(addr, &dlinfo)) { 5810 #ifdef _LP64 5811 st->print("0x%016lx: ", addr); 5812 #else 5813 st->print("0x%08x: ", addr); 5814 #endif 5815 if (dlinfo.dli_sname != NULL) 5816 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5817 else if (dlinfo.dli_fname) 5818 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5819 else 5820 st->print("<absolute address>"); 5821 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5822 #ifdef _LP64 5823 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5824 #else 5825 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5826 #endif 5827 st->cr(); 5828 5829 if (Verbose) { 5830 // decode some bytes around the PC 5831 address begin = same_page(addr-40, addr); 5832 address end = same_page(addr+40, addr); 5833 address lowest = (address) dlinfo.dli_sname; 5834 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5835 if (begin < lowest) begin = lowest; 5836 Dl_info dlinfo2; 5837 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5838 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5839 end = (address) dlinfo2.dli_saddr; 5840 Disassembler::decode(begin, end, st); 5841 } 5842 return true; 5843 } 5844 return false; 5845 } 5846 5847 // Following function has been added to support HotSparc's libjvm.so running 5848 // under Solaris production JDK 1.2.2 / 1.3.0. These came from 5849 // src/solaris/hpi/native_threads in the EVM codebase. 5850 // 5851 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5852 // libraries and should thus be removed. We will leave it behind for a while 5853 // until we no longer want to able to run on top of 1.3.0 Solaris production 5854 // JDK. See 4341971. 5855 5856 #define STACK_SLACK 0x800 5857 5858 extern "C" { 5859 intptr_t sysThreadAvailableStackWithSlack() { 5860 stack_t st; 5861 intptr_t retval, stack_top; 5862 retval = thr_stksegment(&st); 5863 assert(retval == 0, "incorrect return value from thr_stksegment"); 5864 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5865 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5866 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5867 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5868 } 5869 } 5870 5871 // ObjectMonitor park-unpark infrastructure ... 5872 // 5873 // We implement Solaris and Linux PlatformEvents with the 5874 // obvious condvar-mutex-flag triple. 5875 // Another alternative that works quite well is pipes: 5876 // Each PlatformEvent consists of a pipe-pair. 5877 // The thread associated with the PlatformEvent 5878 // calls park(), which reads from the input end of the pipe. 5879 // Unpark() writes into the other end of the pipe. 5880 // The write-side of the pipe must be set NDELAY. 5881 // Unfortunately pipes consume a large # of handles. 5882 // Native solaris lwp_park() and lwp_unpark() work nicely, too. 5883 // Using pipes for the 1st few threads might be workable, however. 5884 // 5885 // park() is permitted to return spuriously. 5886 // Callers of park() should wrap the call to park() in 5887 // an appropriate loop. A litmus test for the correct 5888 // usage of park is the following: if park() were modified 5889 // to immediately return 0 your code should still work, 5890 // albeit degenerating to a spin loop. 5891 // 5892 // An interesting optimization for park() is to use a trylock() 5893 // to attempt to acquire the mutex. If the trylock() fails 5894 // then we know that a concurrent unpark() operation is in-progress. 5895 // in that case the park() code could simply set _count to 0 5896 // and return immediately. The subsequent park() operation *might* 5897 // return immediately. That's harmless as the caller of park() is 5898 // expected to loop. By using trylock() we will have avoided a 5899 // avoided a context switch caused by contention on the per-thread mutex. 5900 // 5901 // TODO-FIXME: 5902 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5903 // objectmonitor implementation. 5904 // 2. Collapse the JSR166 parker event, and the 5905 // objectmonitor ParkEvent into a single "Event" construct. 5906 // 3. In park() and unpark() add: 5907 // assert (Thread::current() == AssociatedWith). 5908 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5909 // 1-out-of-N park() operations will return immediately. 5910 // 5911 // _Event transitions in park() 5912 // -1 => -1 : illegal 5913 // 1 => 0 : pass - return immediately 5914 // 0 => -1 : block 5915 // 5916 // _Event serves as a restricted-range semaphore. 5917 // 5918 // Another possible encoding of _Event would be with 5919 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5920 // 5921 // TODO-FIXME: add DTRACE probes for: 5922 // 1. Tx parks 5923 // 2. Ty unparks Tx 5924 // 3. Tx resumes from park 5925 5926 5927 // value determined through experimentation 5928 #define ROUNDINGFIX 11 5929 5930 // utility to compute the abstime argument to timedwait. 5931 // TODO-FIXME: switch from compute_abstime() to unpackTime(). 5932 5933 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5934 // millis is the relative timeout time 5935 // abstime will be the absolute timeout time 5936 if (millis < 0) millis = 0; 5937 struct timeval now; 5938 int status = gettimeofday(&now, NULL); 5939 assert(status == 0, "gettimeofday"); 5940 jlong seconds = millis / 1000; 5941 jlong max_wait_period; 5942 5943 if (UseLWPSynchronization) { 5944 // forward port of fix for 4275818 (not sleeping long enough) 5945 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5946 // _lwp_cond_timedwait() used a round_down algorithm rather 5947 // than a round_up. For millis less than our roundfactor 5948 // it rounded down to 0 which doesn't meet the spec. 5949 // For millis > roundfactor we may return a bit sooner, but 5950 // since we can not accurately identify the patch level and 5951 // this has already been fixed in Solaris 9 and 8 we will 5952 // leave it alone rather than always rounding down. 5953 5954 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5955 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5956 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5957 max_wait_period = 21000000; 5958 } else { 5959 max_wait_period = 50000000; 5960 } 5961 millis %= 1000; 5962 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5963 seconds = max_wait_period; 5964 } 5965 abstime->tv_sec = now.tv_sec + seconds; 5966 long usec = now.tv_usec + millis * 1000; 5967 if (usec >= 1000000) { 5968 abstime->tv_sec += 1; 5969 usec -= 1000000; 5970 } 5971 abstime->tv_nsec = usec * 1000; 5972 return abstime; 5973 } 5974 5975 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5976 // Conceptually TryPark() should be equivalent to park(0). 5977 5978 int os::PlatformEvent::TryPark() { 5979 for (;;) { 5980 const int v = _Event ; 5981 guarantee ((v == 0) || (v == 1), "invariant") ; 5982 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5983 } 5984 } 5985 5986 void os::PlatformEvent::park() { // AKA: down() 5987 // Invariant: Only the thread associated with the Event/PlatformEvent 5988 // may call park(). 5989 int v ; 5990 for (;;) { 5991 v = _Event ; 5992 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5993 } 5994 guarantee (v >= 0, "invariant") ; 5995 if (v == 0) { 5996 // Do this the hard way by blocking ... 5997 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5998 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5999 // Only for SPARC >= V8PlusA 6000 #if defined(__sparc) && defined(COMPILER2) 6001 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6002 #endif 6003 int status = os::Solaris::mutex_lock(_mutex); 6004 assert_status(status == 0, status, "mutex_lock"); 6005 guarantee (_nParked == 0, "invariant") ; 6006 ++ _nParked ; 6007 while (_Event < 0) { 6008 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 6009 // Treat this the same as if the wait was interrupted 6010 // With usr/lib/lwp going to kernel, always handle ETIME 6011 status = os::Solaris::cond_wait(_cond, _mutex); 6012 if (status == ETIME) status = EINTR ; 6013 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 6014 } 6015 -- _nParked ; 6016 _Event = 0 ; 6017 status = os::Solaris::mutex_unlock(_mutex); 6018 assert_status(status == 0, status, "mutex_unlock"); 6019 // Paranoia to ensure our locked and lock-free paths interact 6020 // correctly with each other. 6021 OrderAccess::fence(); 6022 } 6023 } 6024 6025 int os::PlatformEvent::park(jlong millis) { 6026 guarantee (_nParked == 0, "invariant") ; 6027 int v ; 6028 for (;;) { 6029 v = _Event ; 6030 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6031 } 6032 guarantee (v >= 0, "invariant") ; 6033 if (v != 0) return OS_OK ; 6034 6035 int ret = OS_TIMEOUT; 6036 timestruc_t abst; 6037 compute_abstime (&abst, millis); 6038 6039 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6040 // For Solaris SPARC set fprs.FEF=0 prior to parking. 6041 // Only for SPARC >= V8PlusA 6042 #if defined(__sparc) && defined(COMPILER2) 6043 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6044 #endif 6045 int status = os::Solaris::mutex_lock(_mutex); 6046 assert_status(status == 0, status, "mutex_lock"); 6047 guarantee (_nParked == 0, "invariant") ; 6048 ++ _nParked ; 6049 while (_Event < 0) { 6050 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 6051 assert_status(status == 0 || status == EINTR || 6052 status == ETIME || status == ETIMEDOUT, 6053 status, "cond_timedwait"); 6054 if (!FilterSpuriousWakeups) break ; // previous semantics 6055 if (status == ETIME || status == ETIMEDOUT) break ; 6056 // We consume and ignore EINTR and spurious wakeups. 6057 } 6058 -- _nParked ; 6059 if (_Event >= 0) ret = OS_OK ; 6060 _Event = 0 ; 6061 status = os::Solaris::mutex_unlock(_mutex); 6062 assert_status(status == 0, status, "mutex_unlock"); 6063 // Paranoia to ensure our locked and lock-free paths interact 6064 // correctly with each other. 6065 OrderAccess::fence(); 6066 return ret; 6067 } 6068 6069 void os::PlatformEvent::unpark() { 6070 // Transitions for _Event: 6071 // 0 :=> 1 6072 // 1 :=> 1 6073 // -1 :=> either 0 or 1; must signal target thread 6074 // That is, we can safely transition _Event from -1 to either 6075 // 0 or 1. Forcing 1 is slightly more efficient for back-to-back 6076 // unpark() calls. 6077 // See also: "Semaphores in Plan 9" by Mullender & Cox 6078 // 6079 // Note: Forcing a transition from "-1" to "1" on an unpark() means 6080 // that it will take two back-to-back park() calls for the owning 6081 // thread to block. This has the benefit of forcing a spurious return 6082 // from the first park() call after an unpark() call which will help 6083 // shake out uses of park() and unpark() without condition variables. 6084 6085 if (Atomic::xchg(1, &_Event) >= 0) return; 6086 6087 // If the thread associated with the event was parked, wake it. 6088 // Wait for the thread assoc with the PlatformEvent to vacate. 6089 int status = os::Solaris::mutex_lock(_mutex); 6090 assert_status(status == 0, status, "mutex_lock"); 6091 int AnyWaiters = _nParked; 6092 status = os::Solaris::mutex_unlock(_mutex); 6093 assert_status(status == 0, status, "mutex_unlock"); 6094 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 6095 if (AnyWaiters != 0) { 6096 // We intentional signal *after* dropping the lock 6097 // to avoid a common class of futile wakeups. 6098 status = os::Solaris::cond_signal(_cond); 6099 assert_status(status == 0, status, "cond_signal"); 6100 } 6101 } 6102 6103 // JSR166 6104 // ------------------------------------------------------- 6105 6106 /* 6107 * The solaris and linux implementations of park/unpark are fairly 6108 * conservative for now, but can be improved. They currently use a 6109 * mutex/condvar pair, plus _counter. 6110 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6111 * sets count to 1 and signals condvar. Only one thread ever waits 6112 * on the condvar. Contention seen when trying to park implies that someone 6113 * is unparking you, so don't wait. And spurious returns are fine, so there 6114 * is no need to track notifications. 6115 */ 6116 6117 #define MAX_SECS 100000000 6118 /* 6119 * This code is common to linux and solaris and will be moved to a 6120 * common place in dolphin. 6121 * 6122 * The passed in time value is either a relative time in nanoseconds 6123 * or an absolute time in milliseconds. Either way it has to be unpacked 6124 * into suitable seconds and nanoseconds components and stored in the 6125 * given timespec structure. 6126 * Given time is a 64-bit value and the time_t used in the timespec is only 6127 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6128 * overflow if times way in the future are given. Further on Solaris versions 6129 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6130 * number of seconds, in abstime, is less than current_time + 100,000,000. 6131 * As it will be 28 years before "now + 100000000" will overflow we can 6132 * ignore overflow and just impose a hard-limit on seconds using the value 6133 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6134 * years from "now". 6135 */ 6136 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6137 assert (time > 0, "convertTime"); 6138 6139 struct timeval now; 6140 int status = gettimeofday(&now, NULL); 6141 assert(status == 0, "gettimeofday"); 6142 6143 time_t max_secs = now.tv_sec + MAX_SECS; 6144 6145 if (isAbsolute) { 6146 jlong secs = time / 1000; 6147 if (secs > max_secs) { 6148 absTime->tv_sec = max_secs; 6149 } 6150 else { 6151 absTime->tv_sec = secs; 6152 } 6153 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6154 } 6155 else { 6156 jlong secs = time / NANOSECS_PER_SEC; 6157 if (secs >= MAX_SECS) { 6158 absTime->tv_sec = max_secs; 6159 absTime->tv_nsec = 0; 6160 } 6161 else { 6162 absTime->tv_sec = now.tv_sec + secs; 6163 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6164 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6165 absTime->tv_nsec -= NANOSECS_PER_SEC; 6166 ++absTime->tv_sec; // note: this must be <= max_secs 6167 } 6168 } 6169 } 6170 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6171 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6172 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6173 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6174 } 6175 6176 void Parker::park(bool isAbsolute, jlong time) { 6177 // Ideally we'd do something useful while spinning, such 6178 // as calling unpackTime(). 6179 6180 // Optional fast-path check: 6181 // Return immediately if a permit is available. 6182 // We depend on Atomic::xchg() having full barrier semantics 6183 // since we are doing a lock-free update to _counter. 6184 if (Atomic::xchg(0, &_counter) > 0) return; 6185 6186 // Optional fast-exit: Check interrupt before trying to wait 6187 Thread* thread = Thread::current(); 6188 assert(thread->is_Java_thread(), "Must be JavaThread"); 6189 JavaThread *jt = (JavaThread *)thread; 6190 if (Thread::is_interrupted(thread, false)) { 6191 return; 6192 } 6193 6194 // First, demultiplex/decode time arguments 6195 timespec absTime; 6196 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6197 return; 6198 } 6199 if (time > 0) { 6200 // Warning: this code might be exposed to the old Solaris time 6201 // round-down bugs. Grep "roundingFix" for details. 6202 unpackTime(&absTime, isAbsolute, time); 6203 } 6204 6205 // Enter safepoint region 6206 // Beware of deadlocks such as 6317397. 6207 // The per-thread Parker:: _mutex is a classic leaf-lock. 6208 // In particular a thread must never block on the Threads_lock while 6209 // holding the Parker:: mutex. If safepoints are pending both the 6210 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6211 ThreadBlockInVM tbivm(jt); 6212 6213 // Don't wait if cannot get lock since interference arises from 6214 // unblocking. Also. check interrupt before trying wait 6215 if (Thread::is_interrupted(thread, false) || 6216 os::Solaris::mutex_trylock(_mutex) != 0) { 6217 return; 6218 } 6219 6220 int status ; 6221 6222 if (_counter > 0) { // no wait needed 6223 _counter = 0; 6224 status = os::Solaris::mutex_unlock(_mutex); 6225 assert (status == 0, "invariant") ; 6226 // Paranoia to ensure our locked and lock-free paths interact 6227 // correctly with each other and Java-level accesses. 6228 OrderAccess::fence(); 6229 return; 6230 } 6231 6232 #ifdef ASSERT 6233 // Don't catch signals while blocked; let the running threads have the signals. 6234 // (This allows a debugger to break into the running thread.) 6235 sigset_t oldsigs; 6236 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6237 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6238 #endif 6239 6240 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6241 jt->set_suspend_equivalent(); 6242 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6243 6244 // Do this the hard way by blocking ... 6245 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6246 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6247 // Only for SPARC >= V8PlusA 6248 #if defined(__sparc) && defined(COMPILER2) 6249 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6250 #endif 6251 6252 if (time == 0) { 6253 status = os::Solaris::cond_wait (_cond, _mutex) ; 6254 } else { 6255 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6256 } 6257 // Note that an untimed cond_wait() can sometimes return ETIME on older 6258 // versions of the Solaris. 6259 assert_status(status == 0 || status == EINTR || 6260 status == ETIME || status == ETIMEDOUT, 6261 status, "cond_timedwait"); 6262 6263 #ifdef ASSERT 6264 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6265 #endif 6266 _counter = 0 ; 6267 status = os::Solaris::mutex_unlock(_mutex); 6268 assert_status(status == 0, status, "mutex_unlock") ; 6269 // Paranoia to ensure our locked and lock-free paths interact 6270 // correctly with each other and Java-level accesses. 6271 OrderAccess::fence(); 6272 6273 // If externally suspended while waiting, re-suspend 6274 if (jt->handle_special_suspend_equivalent_condition()) { 6275 jt->java_suspend_self(); 6276 } 6277 } 6278 6279 void Parker::unpark() { 6280 int s, status ; 6281 status = os::Solaris::mutex_lock (_mutex) ; 6282 assert (status == 0, "invariant") ; 6283 s = _counter; 6284 _counter = 1; 6285 status = os::Solaris::mutex_unlock (_mutex) ; 6286 assert (status == 0, "invariant") ; 6287 6288 if (s < 1) { 6289 status = os::Solaris::cond_signal (_cond) ; 6290 assert (status == 0, "invariant") ; 6291 } 6292 } 6293 6294 extern char** environ; 6295 6296 // Run the specified command in a separate process. Return its exit value, 6297 // or -1 on failure (e.g. can't fork a new process). 6298 // Unlike system(), this function can be called from signal handler. It 6299 // doesn't block SIGINT et al. 6300 int os::fork_and_exec(char* cmd) { 6301 char * argv[4]; 6302 argv[0] = (char *)"sh"; 6303 argv[1] = (char *)"-c"; 6304 argv[2] = cmd; 6305 argv[3] = NULL; 6306 6307 // fork is async-safe, fork1 is not so can't use in signal handler 6308 pid_t pid; 6309 Thread* t = ThreadLocalStorage::get_thread_slow(); 6310 if (t != NULL && t->is_inside_signal_handler()) { 6311 pid = fork(); 6312 } else { 6313 pid = fork1(); 6314 } 6315 6316 if (pid < 0) { 6317 // fork failed 6318 warning("fork failed: %s", strerror(errno)); 6319 return -1; 6320 6321 } else if (pid == 0) { 6322 // child process 6323 6324 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6325 execve("/usr/bin/sh", argv, environ); 6326 6327 // execve failed 6328 _exit(-1); 6329 6330 } else { 6331 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6332 // care about the actual exit code, for now. 6333 6334 int status; 6335 6336 // Wait for the child process to exit. This returns immediately if 6337 // the child has already exited. */ 6338 while (waitpid(pid, &status, 0) < 0) { 6339 switch (errno) { 6340 case ECHILD: return 0; 6341 case EINTR: break; 6342 default: return -1; 6343 } 6344 } 6345 6346 if (WIFEXITED(status)) { 6347 // The child exited normally; get its exit code. 6348 return WEXITSTATUS(status); 6349 } else if (WIFSIGNALED(status)) { 6350 // The child exited because of a signal 6351 // The best value to return is 0x80 + signal number, 6352 // because that is what all Unix shells do, and because 6353 // it allows callers to distinguish between process exit and 6354 // process death by signal. 6355 return 0x80 + WTERMSIG(status); 6356 } else { 6357 // Unknown exit code; pass it through 6358 return status; 6359 } 6360 } 6361 } 6362 6363 // is_headless_jre() 6364 // 6365 // Test for the existence of xawt/libmawt.so or libawt_xawt.so 6366 // in order to report if we are running in a headless jre 6367 // 6368 // Since JDK8 xawt/libmawt.so was moved into the same directory 6369 // as libawt.so, and renamed libawt_xawt.so 6370 // 6371 bool os::is_headless_jre() { 6372 struct stat statbuf; 6373 char buf[MAXPATHLEN]; 6374 char libmawtpath[MAXPATHLEN]; 6375 const char *xawtstr = "/xawt/libmawt.so"; 6376 const char *new_xawtstr = "/libawt_xawt.so"; 6377 char *p; 6378 6379 // Get path to libjvm.so 6380 os::jvm_path(buf, sizeof(buf)); 6381 6382 // Get rid of libjvm.so 6383 p = strrchr(buf, '/'); 6384 if (p == NULL) return false; 6385 else *p = '\0'; 6386 6387 // Get rid of client or server 6388 p = strrchr(buf, '/'); 6389 if (p == NULL) return false; 6390 else *p = '\0'; 6391 6392 // check xawt/libmawt.so 6393 strcpy(libmawtpath, buf); 6394 strcat(libmawtpath, xawtstr); 6395 if (::stat(libmawtpath, &statbuf) == 0) return false; 6396 6397 // check libawt_xawt.so 6398 strcpy(libmawtpath, buf); 6399 strcat(libmawtpath, new_xawtstr); 6400 if (::stat(libmawtpath, &statbuf) == 0) return false; 6401 6402 return true; 6403 } 6404 6405 size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6406 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6407 } 6408 6409 int os::close(int fd) { 6410 RESTARTABLE_RETURN_INT(::close(fd)); 6411 } 6412 6413 int os::socket_close(int fd) { 6414 RESTARTABLE_RETURN_INT(::close(fd)); 6415 } 6416 6417 int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 6418 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6419 } 6420 6421 int os::send(int fd, char* buf, size_t nBytes, uint flags) { 6422 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6423 } 6424 6425 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 6426 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 6427 } 6428 6429 // As both poll and select can be interrupted by signals, we have to be 6430 // prepared to restart the system call after updating the timeout, unless 6431 // a poll() is done with timeout == -1, in which case we repeat with this 6432 // "wait forever" value. 6433 6434 int os::timeout(int fd, long timeout) { 6435 int res; 6436 struct timeval t; 6437 julong prevtime, newtime; 6438 static const char* aNull = 0; 6439 struct pollfd pfd; 6440 pfd.fd = fd; 6441 pfd.events = POLLIN; 6442 6443 gettimeofday(&t, &aNull); 6444 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6445 6446 for(;;) { 6447 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6448 if(res == OS_ERR && errno == EINTR) { 6449 if(timeout != -1) { 6450 gettimeofday(&t, &aNull); 6451 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6452 timeout -= newtime - prevtime; 6453 if(timeout <= 0) 6454 return OS_OK; 6455 prevtime = newtime; 6456 } 6457 } else return res; 6458 } 6459 } 6460 6461 int os::connect(int fd, struct sockaddr *him, socklen_t len) { 6462 int _result; 6463 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\ 6464 os::Solaris::clear_interrupted); 6465 6466 // Depending on when thread interruption is reset, _result could be 6467 // one of two values when errno == EINTR 6468 6469 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6470 && (errno == EINTR)) { 6471 /* restarting a connect() changes its errno semantics */ 6472 INTERRUPTIBLE(::connect(fd, him, len), _result,\ 6473 os::Solaris::clear_interrupted); 6474 /* undo these changes */ 6475 if (_result == OS_ERR) { 6476 if (errno == EALREADY) { 6477 errno = EINPROGRESS; /* fall through */ 6478 } else if (errno == EISCONN) { 6479 errno = 0; 6480 return OS_OK; 6481 } 6482 } 6483 } 6484 return _result; 6485 } 6486 6487 int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 6488 if (fd < 0) { 6489 return OS_ERR; 6490 } 6491 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\ 6492 os::Solaris::clear_interrupted); 6493 } 6494 6495 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 6496 sockaddr* from, socklen_t* fromlen) { 6497 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\ 6498 os::Solaris::clear_interrupted); 6499 } 6500 6501 int os::sendto(int fd, char* buf, size_t len, uint flags, 6502 struct sockaddr* to, socklen_t tolen) { 6503 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\ 6504 os::Solaris::clear_interrupted); 6505 } 6506 6507 int os::socket_available(int fd, jint *pbytes) { 6508 if (fd < 0) { 6509 return OS_OK; 6510 } 6511 int ret; 6512 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6513 // note: ioctl can return 0 when successful, JVM_SocketAvailable 6514 // is expected to return 0 on failure and 1 on success to the jdk. 6515 return (ret == OS_ERR) ? 0 : 1; 6516 } 6517 6518 int os::bind(int fd, struct sockaddr* him, socklen_t len) { 6519 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6520 os::Solaris::clear_interrupted); 6521 } 6522 6523 // Get the default path to the core file 6524 // Returns the length of the string 6525 int os::get_core_path(char* buffer, size_t bufferSize) { 6526 const char* p = get_current_directory(buffer, bufferSize); 6527 6528 if (p == NULL) { 6529 assert(p != NULL, "failed to get current directory"); 6530 return 0; 6531 } 6532 6533 return strlen(buffer); 6534 }