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