1 /* 2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "classfile/classLoader.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/icBuffer.hpp" 30 #include "code/vtableStubs.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "compiler/disassembler.hpp" 33 #include "interpreter/interpreter.hpp" 34 #include "jvm_solaris.h" 35 #include "memory/allocation.inline.hpp" 36 #include "memory/filemap.hpp" 37 #include "mutex_solaris.inline.hpp" 38 #include "oops/oop.inline.hpp" 39 #include "os_share_solaris.hpp" 40 #include "prims/jniFastGetField.hpp" 41 #include "prims/jvm.h" 42 #include "prims/jvm_misc.hpp" 43 #include "runtime/arguments.hpp" 44 #include "runtime/extendedPC.hpp" 45 #include "runtime/globals.hpp" 46 #include "runtime/interfaceSupport.hpp" 47 #include "runtime/java.hpp" 48 #include "runtime/javaCalls.hpp" 49 #include "runtime/mutexLocker.hpp" 50 #include "runtime/objectMonitor.hpp" 51 #include "runtime/osThread.hpp" 52 #include "runtime/perfMemory.hpp" 53 #include "runtime/sharedRuntime.hpp" 54 #include "runtime/statSampler.hpp" 55 #include "runtime/stubRoutines.hpp" 56 #include "runtime/thread.inline.hpp" 57 #include "runtime/threadCritical.hpp" 58 #include "runtime/timer.hpp" 59 #include "services/attachListener.hpp" 60 #include "services/memTracker.hpp" 61 #include "services/runtimeService.hpp" 62 #include "utilities/decoder.hpp" 63 #include "utilities/defaultStream.hpp" 64 #include "utilities/events.hpp" 65 #include "utilities/growableArray.hpp" 66 #include "utilities/vmError.hpp" 67 68 // put OS-includes here 69 # include <dlfcn.h> 70 # include <errno.h> 71 # include <exception> 72 # include <link.h> 73 # include <poll.h> 74 # include <pthread.h> 75 # include <pwd.h> 76 # include <schedctl.h> 77 # include <setjmp.h> 78 # include <signal.h> 79 # include <stdio.h> 80 # include <alloca.h> 81 # include <sys/filio.h> 82 # include <sys/ipc.h> 83 # include <sys/lwp.h> 84 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 85 # include <sys/mman.h> 86 # include <sys/processor.h> 87 # include <sys/procset.h> 88 # include <sys/pset.h> 89 # include <sys/resource.h> 90 # include <sys/shm.h> 91 # include <sys/socket.h> 92 # include <sys/stat.h> 93 # include <sys/systeminfo.h> 94 # include <sys/time.h> 95 # include <sys/times.h> 96 # include <sys/types.h> 97 # include <sys/wait.h> 98 # include <sys/utsname.h> 99 # include <thread.h> 100 # include <unistd.h> 101 # include <sys/priocntl.h> 102 # include <sys/rtpriocntl.h> 103 # include <sys/tspriocntl.h> 104 # include <sys/iapriocntl.h> 105 # include <sys/fxpriocntl.h> 106 # include <sys/loadavg.h> 107 # include <string.h> 108 # include <stdio.h> 109 110 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 111 # include <sys/procfs.h> // see comment in <sys/procfs.h> 112 113 #define MAX_PATH (2 * K) 114 115 // for timer info max values which include all bits 116 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 117 118 #ifdef _GNU_SOURCE 119 // See bug #6514594 120 extern "C" int madvise(caddr_t, size_t, int); 121 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 122 int attr, int mask); 123 #endif //_GNU_SOURCE 124 125 /* 126 MPSS Changes Start. 127 The JVM binary needs to be built and run on pre-Solaris 9 128 systems, but the constants needed by MPSS are only in Solaris 9 129 header files. They are textually replicated here to allow 130 building on earlier systems. Once building on Solaris 8 is 131 no longer a requirement, these #defines can be replaced by ordinary 132 system .h inclusion. 133 134 In earlier versions of the JDK and Solaris, we used ISM for large pages. 135 But ISM requires shared memory to achieve this and thus has many caveats. 136 MPSS is a fully transparent and is a cleaner way to get large pages. 137 Although we still require keeping ISM for backward compatiblitiy as well as 138 giving the opportunity to use large pages on older systems it is 139 recommended that MPSS be used for Solaris 9 and above. 140 141 */ 142 143 #ifndef MC_HAT_ADVISE 144 145 struct memcntl_mha { 146 uint_t mha_cmd; /* command(s) */ 147 uint_t mha_flags; 148 size_t mha_pagesize; 149 }; 150 #define MC_HAT_ADVISE 7 /* advise hat map size */ 151 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 152 #define MAP_ALIGN 0x200 /* addr specifies alignment */ 153 154 #endif 155 // MPSS Changes End. 156 157 158 // Here are some liblgrp types from sys/lgrp_user.h to be able to 159 // compile on older systems without this header file. 160 161 #ifndef MADV_ACCESS_LWP 162 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 163 #endif 164 #ifndef MADV_ACCESS_MANY 165 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 166 #endif 167 168 #ifndef LGRP_RSRC_CPU 169 # define LGRP_RSRC_CPU 0 /* CPU resources */ 170 #endif 171 #ifndef LGRP_RSRC_MEM 172 # define LGRP_RSRC_MEM 1 /* memory resources */ 173 #endif 174 175 // Some more macros from sys/mman.h that are not present in Solaris 8. 176 177 #ifndef MAX_MEMINFO_CNT 178 /* 179 * info_req request type definitions for meminfo 180 * request types starting with MEMINFO_V are used for Virtual addresses 181 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 182 * addresses 183 */ 184 # define MEMINFO_SHIFT 16 185 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 186 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 187 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 188 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 189 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 190 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 191 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 192 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 193 194 /* maximum number of addresses meminfo() can process at a time */ 195 # define MAX_MEMINFO_CNT 256 196 197 /* maximum number of request types */ 198 # define MAX_MEMINFO_REQ 31 199 #endif 200 201 // see thr_setprio(3T) for the basis of these numbers 202 #define MinimumPriority 0 203 #define NormalPriority 64 204 #define MaximumPriority 127 205 206 // Values for ThreadPriorityPolicy == 1 207 int prio_policy1[CriticalPriority+1] = { 208 -99999, 0, 16, 32, 48, 64, 209 80, 96, 112, 124, 127, 127 }; 210 211 // System parameters used internally 212 static clock_t clock_tics_per_sec = 100; 213 214 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 215 static bool enabled_extended_FILE_stdio = false; 216 217 // For diagnostics to print a message once. see run_periodic_checks 218 static bool check_addr0_done = false; 219 static sigset_t check_signal_done; 220 static bool check_signals = true; 221 222 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 223 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 224 225 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 226 227 228 // "default" initializers for missing libc APIs 229 extern "C" { 230 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 231 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 232 233 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 234 static int lwp_cond_destroy(cond_t *cv) { return 0; } 235 } 236 237 // "default" initializers for pthread-based synchronization 238 extern "C" { 239 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 240 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 241 } 242 243 // Thread Local Storage 244 // This is common to all Solaris platforms so it is defined here, 245 // in this common file. 246 // The declarations are in the os_cpu threadLS*.hpp files. 247 // 248 // Static member initialization for TLS 249 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 250 251 #ifndef PRODUCT 252 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 253 254 int ThreadLocalStorage::_tcacheHit = 0; 255 int ThreadLocalStorage::_tcacheMiss = 0; 256 257 void ThreadLocalStorage::print_statistics() { 258 int total = _tcacheMiss+_tcacheHit; 259 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 260 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 261 } 262 #undef _PCT 263 #endif // PRODUCT 264 265 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 266 int index) { 267 Thread *thread = get_thread_slow(); 268 if (thread != NULL) { 269 address sp = os::current_stack_pointer(); 270 guarantee(thread->_stack_base == NULL || 271 (sp <= thread->_stack_base && 272 sp >= thread->_stack_base - thread->_stack_size) || 273 is_error_reported(), 274 "sp must be inside of selected thread stack"); 275 276 thread->set_self_raw_id(raw_id); // mark for quick retrieval 277 _get_thread_cache[ index ] = thread; 278 } 279 return thread; 280 } 281 282 283 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 284 #define NO_CACHED_THREAD ((Thread*)all_zero) 285 286 void ThreadLocalStorage::pd_set_thread(Thread* thread) { 287 288 // Store the new value before updating the cache to prevent a race 289 // between get_thread_via_cache_slowly() and this store operation. 290 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 291 292 // Update thread cache with new thread if setting on thread create, 293 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 294 uintptr_t raw = pd_raw_thread_id(); 295 int ix = pd_cache_index(raw); 296 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 297 } 298 299 void ThreadLocalStorage::pd_init() { 300 for (int i = 0; i < _pd_cache_size; i++) { 301 _get_thread_cache[i] = NO_CACHED_THREAD; 302 } 303 } 304 305 // Invalidate all the caches (happens to be the same as pd_init). 306 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 307 308 #undef NO_CACHED_THREAD 309 310 // END Thread Local Storage 311 312 static inline size_t adjust_stack_size(address base, size_t size) { 313 if ((ssize_t)size < 0) { 314 // 4759953: Compensate for ridiculous stack size. 315 size = max_intx; 316 } 317 if (size > (size_t)base) { 318 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 319 size = (size_t)base; 320 } 321 return size; 322 } 323 324 static inline stack_t get_stack_info() { 325 stack_t st; 326 int retval = thr_stksegment(&st); 327 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 328 assert(retval == 0, "incorrect return value from thr_stksegment"); 329 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 330 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 331 return st; 332 } 333 334 address os::current_stack_base() { 335 int r = thr_main() ; 336 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 337 bool is_primordial_thread = r; 338 339 // Workaround 4352906, avoid calls to thr_stksegment by 340 // thr_main after the first one (it looks like we trash 341 // some data, causing the value for ss_sp to be incorrect). 342 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 343 stack_t st = get_stack_info(); 344 if (is_primordial_thread) { 345 // cache initial value of stack base 346 os::Solaris::_main_stack_base = (address)st.ss_sp; 347 } 348 return (address)st.ss_sp; 349 } else { 350 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 351 return os::Solaris::_main_stack_base; 352 } 353 } 354 355 size_t os::current_stack_size() { 356 size_t size; 357 358 int r = thr_main() ; 359 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 360 if(!r) { 361 size = get_stack_info().ss_size; 362 } else { 363 struct rlimit limits; 364 getrlimit(RLIMIT_STACK, &limits); 365 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 366 } 367 // base may not be page aligned 368 address base = current_stack_base(); 369 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 370 return (size_t)(base - bottom); 371 } 372 373 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 374 return localtime_r(clock, res); 375 } 376 377 // interruptible infrastructure 378 379 // setup_interruptible saves the thread state before going into an 380 // interruptible system call. 381 // The saved state is used to restore the thread to 382 // its former state whether or not an interrupt is received. 383 // Used by classloader os::read 384 // os::restartable_read calls skip this layer and stay in _thread_in_native 385 386 void os::Solaris::setup_interruptible(JavaThread* thread) { 387 388 JavaThreadState thread_state = thread->thread_state(); 389 390 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 391 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 392 OSThread* osthread = thread->osthread(); 393 osthread->set_saved_interrupt_thread_state(thread_state); 394 thread->frame_anchor()->make_walkable(thread); 395 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 396 } 397 398 // Version of setup_interruptible() for threads that are already in 399 // _thread_blocked. Used by os_sleep(). 400 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 401 thread->frame_anchor()->make_walkable(thread); 402 } 403 404 JavaThread* os::Solaris::setup_interruptible() { 405 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 406 setup_interruptible(thread); 407 return thread; 408 } 409 410 void os::Solaris::try_enable_extended_io() { 411 typedef int (*enable_extended_FILE_stdio_t)(int, int); 412 413 if (!UseExtendedFileIO) { 414 return; 415 } 416 417 enable_extended_FILE_stdio_t enabler = 418 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 419 "enable_extended_FILE_stdio"); 420 if (enabler) { 421 enabler(-1, -1); 422 } 423 } 424 425 426 #ifdef ASSERT 427 428 JavaThread* os::Solaris::setup_interruptible_native() { 429 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 430 JavaThreadState thread_state = thread->thread_state(); 431 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 432 return thread; 433 } 434 435 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 436 JavaThreadState thread_state = thread->thread_state(); 437 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 438 } 439 #endif 440 441 // cleanup_interruptible reverses the effects of setup_interruptible 442 // setup_interruptible_already_blocked() does not need any cleanup. 443 444 void os::Solaris::cleanup_interruptible(JavaThread* thread) { 445 OSThread* osthread = thread->osthread(); 446 447 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 448 } 449 450 // I/O interruption related counters called in _INTERRUPTIBLE 451 452 void os::Solaris::bump_interrupted_before_count() { 453 RuntimeService::record_interrupted_before_count(); 454 } 455 456 void os::Solaris::bump_interrupted_during_count() { 457 RuntimeService::record_interrupted_during_count(); 458 } 459 460 static int _processors_online = 0; 461 462 jint os::Solaris::_os_thread_limit = 0; 463 volatile jint os::Solaris::_os_thread_count = 0; 464 465 julong os::available_memory() { 466 return Solaris::available_memory(); 467 } 468 469 julong os::Solaris::available_memory() { 470 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 471 } 472 473 julong os::Solaris::_physical_memory = 0; 474 475 julong os::physical_memory() { 476 return Solaris::physical_memory(); 477 } 478 479 julong os::allocatable_physical_memory(julong size) { 480 #ifdef _LP64 481 return size; 482 #else 483 julong result = MIN2(size, (julong)3835*M); 484 if (!is_allocatable(result)) { 485 // Memory allocations will be aligned but the alignment 486 // is not known at this point. Alignments will 487 // be at most to LargePageSizeInBytes. Protect 488 // allocations from alignments up to illegal 489 // values. If at this point 2G is illegal. 490 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 491 result = MIN2(size, reasonable_size); 492 } 493 return result; 494 #endif 495 } 496 497 static hrtime_t first_hrtime = 0; 498 static const hrtime_t hrtime_hz = 1000*1000*1000; 499 const int LOCK_BUSY = 1; 500 const int LOCK_FREE = 0; 501 const int LOCK_INVALID = -1; 502 static volatile hrtime_t max_hrtime = 0; 503 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 504 505 506 void os::Solaris::initialize_system_info() { 507 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 508 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 509 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 510 } 511 512 int os::active_processor_count() { 513 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 514 pid_t pid = getpid(); 515 psetid_t pset = PS_NONE; 516 // Are we running in a processor set or is there any processor set around? 517 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 518 uint_t pset_cpus; 519 // Query the number of cpus available to us. 520 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 521 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 522 _processors_online = pset_cpus; 523 return pset_cpus; 524 } 525 } 526 // Otherwise return number of online cpus 527 return online_cpus; 528 } 529 530 static bool find_processors_in_pset(psetid_t pset, 531 processorid_t** id_array, 532 uint_t* id_length) { 533 bool result = false; 534 // Find the number of processors in the processor set. 535 if (pset_info(pset, NULL, id_length, NULL) == 0) { 536 // Make up an array to hold their ids. 537 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 538 // Fill in the array with their processor ids. 539 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 540 result = true; 541 } 542 } 543 return result; 544 } 545 546 // Callers of find_processors_online() must tolerate imprecise results -- 547 // the system configuration can change asynchronously because of DR 548 // or explicit psradm operations. 549 // 550 // We also need to take care that the loop (below) terminates as the 551 // number of processors online can change between the _SC_NPROCESSORS_ONLN 552 // request and the loop that builds the list of processor ids. Unfortunately 553 // there's no reliable way to determine the maximum valid processor id, 554 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 555 // man pages, which claim the processor id set is "sparse, but 556 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 557 // exit the loop. 558 // 559 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 560 // not available on S8.0. 561 562 static bool find_processors_online(processorid_t** id_array, 563 uint* id_length) { 564 const processorid_t MAX_PROCESSOR_ID = 100000 ; 565 // Find the number of processors online. 566 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 567 // Make up an array to hold their ids. 568 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 569 // Processors need not be numbered consecutively. 570 long found = 0; 571 processorid_t next = 0; 572 while (found < *id_length && next < MAX_PROCESSOR_ID) { 573 processor_info_t info; 574 if (processor_info(next, &info) == 0) { 575 // NB, PI_NOINTR processors are effectively online ... 576 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 577 (*id_array)[found] = next; 578 found += 1; 579 } 580 } 581 next += 1; 582 } 583 if (found < *id_length) { 584 // The loop above didn't identify the expected number of processors. 585 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 586 // and re-running the loop, above, but there's no guarantee of progress 587 // if the system configuration is in flux. Instead, we just return what 588 // we've got. Note that in the worst case find_processors_online() could 589 // return an empty set. (As a fall-back in the case of the empty set we 590 // could just return the ID of the current processor). 591 *id_length = found ; 592 } 593 594 return true; 595 } 596 597 static bool assign_distribution(processorid_t* id_array, 598 uint id_length, 599 uint* distribution, 600 uint distribution_length) { 601 // We assume we can assign processorid_t's to uint's. 602 assert(sizeof(processorid_t) == sizeof(uint), 603 "can't convert processorid_t to uint"); 604 // Quick check to see if we won't succeed. 605 if (id_length < distribution_length) { 606 return false; 607 } 608 // Assign processor ids to the distribution. 609 // Try to shuffle processors to distribute work across boards, 610 // assuming 4 processors per board. 611 const uint processors_per_board = ProcessDistributionStride; 612 // Find the maximum processor id. 613 processorid_t max_id = 0; 614 for (uint m = 0; m < id_length; m += 1) { 615 max_id = MAX2(max_id, id_array[m]); 616 } 617 // The next id, to limit loops. 618 const processorid_t limit_id = max_id + 1; 619 // Make up markers for available processors. 620 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 621 for (uint c = 0; c < limit_id; c += 1) { 622 available_id[c] = false; 623 } 624 for (uint a = 0; a < id_length; a += 1) { 625 available_id[id_array[a]] = true; 626 } 627 // Step by "boards", then by "slot", copying to "assigned". 628 // NEEDS_CLEANUP: The assignment of processors should be stateful, 629 // remembering which processors have been assigned by 630 // previous calls, etc., so as to distribute several 631 // independent calls of this method. What we'd like is 632 // It would be nice to have an API that let us ask 633 // how many processes are bound to a processor, 634 // but we don't have that, either. 635 // In the short term, "board" is static so that 636 // subsequent distributions don't all start at board 0. 637 static uint board = 0; 638 uint assigned = 0; 639 // Until we've found enough processors .... 640 while (assigned < distribution_length) { 641 // ... find the next available processor in the board. 642 for (uint slot = 0; slot < processors_per_board; slot += 1) { 643 uint try_id = board * processors_per_board + slot; 644 if ((try_id < limit_id) && (available_id[try_id] == true)) { 645 distribution[assigned] = try_id; 646 available_id[try_id] = false; 647 assigned += 1; 648 break; 649 } 650 } 651 board += 1; 652 if (board * processors_per_board + 0 >= limit_id) { 653 board = 0; 654 } 655 } 656 if (available_id != NULL) { 657 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 658 } 659 return true; 660 } 661 662 void os::set_native_thread_name(const char *name) { 663 // Not yet implemented. 664 return; 665 } 666 667 bool os::distribute_processes(uint length, uint* distribution) { 668 bool result = false; 669 // Find the processor id's of all the available CPUs. 670 processorid_t* id_array = NULL; 671 uint id_length = 0; 672 // There are some races between querying information and using it, 673 // since processor sets can change dynamically. 674 psetid_t pset = PS_NONE; 675 // Are we running in a processor set? 676 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 677 result = find_processors_in_pset(pset, &id_array, &id_length); 678 } else { 679 result = find_processors_online(&id_array, &id_length); 680 } 681 if (result == true) { 682 if (id_length >= length) { 683 result = assign_distribution(id_array, id_length, distribution, length); 684 } else { 685 result = false; 686 } 687 } 688 if (id_array != NULL) { 689 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 690 } 691 return result; 692 } 693 694 bool os::bind_to_processor(uint processor_id) { 695 // We assume that a processorid_t can be stored in a uint. 696 assert(sizeof(uint) == sizeof(processorid_t), 697 "can't convert uint to processorid_t"); 698 int bind_result = 699 processor_bind(P_LWPID, // bind LWP. 700 P_MYID, // bind current LWP. 701 (processorid_t) processor_id, // id. 702 NULL); // don't return old binding. 703 return (bind_result == 0); 704 } 705 706 bool os::getenv(const char* name, char* buffer, int len) { 707 char* val = ::getenv( name ); 708 if ( val == NULL 709 || strlen(val) + 1 > len ) { 710 if (len > 0) buffer[0] = 0; // return a null string 711 return false; 712 } 713 strcpy( buffer, val ); 714 return true; 715 } 716 717 718 // Return true if user is running as root. 719 720 bool os::have_special_privileges() { 721 static bool init = false; 722 static bool privileges = false; 723 if (!init) { 724 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 725 init = true; 726 } 727 return privileges; 728 } 729 730 731 void os::init_system_properties_values() { 732 char arch[12]; 733 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 734 735 // The next steps are taken in the product version: 736 // 737 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 738 // This library should be located at: 739 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 740 // 741 // If "/jre/lib/" appears at the right place in the path, then we 742 // assume libjvm[_g].so is installed in a JDK and we use this path. 743 // 744 // Otherwise exit with message: "Could not create the Java virtual machine." 745 // 746 // The following extra steps are taken in the debugging version: 747 // 748 // If "/jre/lib/" does NOT appear at the right place in the path 749 // instead of exit check for $JAVA_HOME environment variable. 750 // 751 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 752 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 753 // it looks like libjvm[_g].so is installed there 754 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 755 // 756 // Otherwise exit. 757 // 758 // Important note: if the location of libjvm.so changes this 759 // code needs to be changed accordingly. 760 761 // The next few definitions allow the code to be verbatim: 762 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n), mtInternal) 763 #define free(p) FREE_C_HEAP_ARRAY(char, p, mtInternal) 764 #define getenv(n) ::getenv(n) 765 766 #define EXTENSIONS_DIR "/lib/ext" 767 #define ENDORSED_DIR "/lib/endorsed" 768 #define COMMON_DIR "/usr/jdk/packages" 769 770 { 771 /* sysclasspath, java_home, dll_dir */ 772 { 773 char *home_path; 774 char *dll_path; 775 char *pslash; 776 char buf[MAXPATHLEN]; 777 os::jvm_path(buf, sizeof(buf)); 778 779 // Found the full path to libjvm.so. 780 // Now cut the path to <java_home>/jre if we can. 781 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 782 pslash = strrchr(buf, '/'); 783 if (pslash != NULL) 784 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 785 dll_path = malloc(strlen(buf) + 1); 786 if (dll_path == NULL) 787 return; 788 strcpy(dll_path, buf); 789 Arguments::set_dll_dir(dll_path); 790 791 if (pslash != NULL) { 792 pslash = strrchr(buf, '/'); 793 if (pslash != NULL) { 794 *pslash = '\0'; /* get rid of /<arch> */ 795 pslash = strrchr(buf, '/'); 796 if (pslash != NULL) 797 *pslash = '\0'; /* get rid of /lib */ 798 } 799 } 800 801 home_path = malloc(strlen(buf) + 1); 802 if (home_path == NULL) 803 return; 804 strcpy(home_path, buf); 805 Arguments::set_java_home(home_path); 806 807 if (!set_boot_path('/', ':')) 808 return; 809 } 810 811 /* 812 * Where to look for native libraries 813 */ 814 { 815 // Use dlinfo() to determine the correct java.library.path. 816 // 817 // If we're launched by the Java launcher, and the user 818 // does not set java.library.path explicitly on the commandline, 819 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 820 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 821 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 822 // /usr/lib), which is exactly what we want. 823 // 824 // If the user does set java.library.path, it completely 825 // overwrites this setting, and always has. 826 // 827 // If we're not launched by the Java launcher, we may 828 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 829 // settings. Again, dlinfo does exactly what we want. 830 831 Dl_serinfo _info, *info = &_info; 832 Dl_serpath *path; 833 char* library_path; 834 char *common_path; 835 int i; 836 837 // determine search path count and required buffer size 838 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 839 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 840 } 841 842 // allocate new buffer and initialize 843 info = (Dl_serinfo*)malloc(_info.dls_size); 844 if (info == NULL) { 845 vm_exit_out_of_memory(_info.dls_size, 846 "init_system_properties_values info"); 847 } 848 info->dls_size = _info.dls_size; 849 info->dls_cnt = _info.dls_cnt; 850 851 // obtain search path information 852 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 853 free(info); 854 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 855 } 856 857 path = &info->dls_serpath[0]; 858 859 // Note: Due to a legacy implementation, most of the library path 860 // is set in the launcher. This was to accomodate linking restrictions 861 // on legacy Solaris implementations (which are no longer supported). 862 // Eventually, all the library path setting will be done here. 863 // 864 // However, to prevent the proliferation of improperly built native 865 // libraries, the new path component /usr/jdk/packages is added here. 866 867 // Determine the actual CPU architecture. 868 char cpu_arch[12]; 869 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 870 #ifdef _LP64 871 // If we are a 64-bit vm, perform the following translations: 872 // sparc -> sparcv9 873 // i386 -> amd64 874 if (strcmp(cpu_arch, "sparc") == 0) 875 strcat(cpu_arch, "v9"); 876 else if (strcmp(cpu_arch, "i386") == 0) 877 strcpy(cpu_arch, "amd64"); 878 #endif 879 880 // Construct the invariant part of ld_library_path. Note that the 881 // space for the colon and the trailing null are provided by the 882 // nulls included by the sizeof operator. 883 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 884 common_path = malloc(bufsize); 885 if (common_path == NULL) { 886 free(info); 887 vm_exit_out_of_memory(bufsize, 888 "init_system_properties_values common_path"); 889 } 890 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 891 892 // struct size is more than sufficient for the path components obtained 893 // through the dlinfo() call, so only add additional space for the path 894 // components explicitly added here. 895 bufsize = info->dls_size + strlen(common_path); 896 library_path = malloc(bufsize); 897 if (library_path == NULL) { 898 free(info); 899 free(common_path); 900 vm_exit_out_of_memory(bufsize, 901 "init_system_properties_values library_path"); 902 } 903 library_path[0] = '\0'; 904 905 // Construct the desired Java library path from the linker's library 906 // search path. 907 // 908 // For compatibility, it is optimal that we insert the additional path 909 // components specific to the Java VM after those components specified 910 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 911 // infrastructure. 912 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 913 strcpy(library_path, common_path); 914 } else { 915 int inserted = 0; 916 for (i = 0; i < info->dls_cnt; i++, path++) { 917 uint_t flags = path->dls_flags & LA_SER_MASK; 918 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 919 strcat(library_path, common_path); 920 strcat(library_path, os::path_separator()); 921 inserted = 1; 922 } 923 strcat(library_path, path->dls_name); 924 strcat(library_path, os::path_separator()); 925 } 926 // eliminate trailing path separator 927 library_path[strlen(library_path)-1] = '\0'; 928 } 929 930 // happens before argument parsing - can't use a trace flag 931 // tty->print_raw("init_system_properties_values: native lib path: "); 932 // tty->print_raw_cr(library_path); 933 934 // callee copies into its own buffer 935 Arguments::set_library_path(library_path); 936 937 free(common_path); 938 free(library_path); 939 free(info); 940 } 941 942 /* 943 * Extensions directories. 944 * 945 * Note that the space for the colon and the trailing null are provided 946 * by the nulls included by the sizeof operator (so actually one byte more 947 * than necessary is allocated). 948 */ 949 { 950 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 951 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 952 sizeof(EXTENSIONS_DIR)); 953 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 954 Arguments::get_java_home()); 955 Arguments::set_ext_dirs(buf); 956 } 957 958 /* Endorsed standards default directory. */ 959 { 960 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 961 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 962 Arguments::set_endorsed_dirs(buf); 963 } 964 } 965 966 #undef malloc 967 #undef free 968 #undef getenv 969 #undef EXTENSIONS_DIR 970 #undef ENDORSED_DIR 971 #undef COMMON_DIR 972 973 } 974 975 void os::breakpoint() { 976 BREAKPOINT; 977 } 978 979 bool os::obsolete_option(const JavaVMOption *option) 980 { 981 if (!strncmp(option->optionString, "-Xt", 3)) { 982 return true; 983 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 984 return true; 985 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 986 return true; 987 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 988 return true; 989 } 990 return false; 991 } 992 993 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 994 address stackStart = (address)thread->stack_base(); 995 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 996 if (sp < stackStart && sp >= stackEnd ) return true; 997 return false; 998 } 999 1000 extern "C" void breakpoint() { 1001 // use debugger to set breakpoint here 1002 } 1003 1004 static thread_t main_thread; 1005 1006 // Thread start routine for all new Java threads 1007 extern "C" void* java_start(void* thread_addr) { 1008 // Try to randomize the cache line index of hot stack frames. 1009 // This helps when threads of the same stack traces evict each other's 1010 // cache lines. The threads can be either from the same JVM instance, or 1011 // from different JVM instances. The benefit is especially true for 1012 // processors with hyperthreading technology. 1013 static int counter = 0; 1014 int pid = os::current_process_id(); 1015 alloca(((pid ^ counter++) & 7) * 128); 1016 1017 int prio; 1018 Thread* thread = (Thread*)thread_addr; 1019 OSThread* osthr = thread->osthread(); 1020 1021 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 1022 thread->_schedctl = (void *) schedctl_init () ; 1023 1024 if (UseNUMA) { 1025 int lgrp_id = os::numa_get_group_id(); 1026 if (lgrp_id != -1) { 1027 thread->set_lgrp_id(lgrp_id); 1028 } 1029 } 1030 1031 // If the creator called set priority before we started, 1032 // we need to call set_native_priority now that we have an lwp. 1033 // We used to get the priority from thr_getprio (we called 1034 // thr_setprio way back in create_thread) and pass it to 1035 // set_native_priority, but Solaris scales the priority 1036 // in java_to_os_priority, so when we read it back here, 1037 // we pass trash to set_native_priority instead of what's 1038 // in java_to_os_priority. So we save the native priority 1039 // in the osThread and recall it here. 1040 1041 if ( osthr->thread_id() != -1 ) { 1042 if ( UseThreadPriorities ) { 1043 int prio = osthr->native_priority(); 1044 if (ThreadPriorityVerbose) { 1045 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 1046 INTPTR_FORMAT ", setting priority: %d\n", 1047 osthr->thread_id(), osthr->lwp_id(), prio); 1048 } 1049 os::set_native_priority(thread, prio); 1050 } 1051 } else if (ThreadPriorityVerbose) { 1052 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1053 } 1054 1055 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1056 1057 // initialize signal mask for this thread 1058 os::Solaris::hotspot_sigmask(thread); 1059 1060 thread->run(); 1061 1062 // One less thread is executing 1063 // When the VMThread gets here, the main thread may have already exited 1064 // which frees the CodeHeap containing the Atomic::dec code 1065 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1066 Atomic::dec(&os::Solaris::_os_thread_count); 1067 } 1068 1069 if (UseDetachedThreads) { 1070 thr_exit(NULL); 1071 ShouldNotReachHere(); 1072 } 1073 return NULL; 1074 } 1075 1076 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1077 // Allocate the OSThread object 1078 OSThread* osthread = new OSThread(NULL, NULL); 1079 if (osthread == NULL) return NULL; 1080 1081 // Store info on the Solaris thread into the OSThread 1082 osthread->set_thread_id(thread_id); 1083 osthread->set_lwp_id(_lwp_self()); 1084 thread->_schedctl = (void *) schedctl_init () ; 1085 1086 if (UseNUMA) { 1087 int lgrp_id = os::numa_get_group_id(); 1088 if (lgrp_id != -1) { 1089 thread->set_lgrp_id(lgrp_id); 1090 } 1091 } 1092 1093 if ( ThreadPriorityVerbose ) { 1094 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1095 osthread->thread_id(), osthread->lwp_id() ); 1096 } 1097 1098 // Initial thread state is INITIALIZED, not SUSPENDED 1099 osthread->set_state(INITIALIZED); 1100 1101 return osthread; 1102 } 1103 1104 void os::Solaris::hotspot_sigmask(Thread* thread) { 1105 1106 //Save caller's signal mask 1107 sigset_t sigmask; 1108 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1109 OSThread *osthread = thread->osthread(); 1110 osthread->set_caller_sigmask(sigmask); 1111 1112 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1113 if (!ReduceSignalUsage) { 1114 if (thread->is_VM_thread()) { 1115 // Only the VM thread handles BREAK_SIGNAL ... 1116 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1117 } else { 1118 // ... all other threads block BREAK_SIGNAL 1119 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1120 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1121 } 1122 } 1123 } 1124 1125 bool os::create_attached_thread(JavaThread* thread) { 1126 #ifdef ASSERT 1127 thread->verify_not_published(); 1128 #endif 1129 OSThread* osthread = create_os_thread(thread, thr_self()); 1130 if (osthread == NULL) { 1131 return false; 1132 } 1133 1134 // Initial thread state is RUNNABLE 1135 osthread->set_state(RUNNABLE); 1136 thread->set_osthread(osthread); 1137 1138 // initialize signal mask for this thread 1139 // and save the caller's signal mask 1140 os::Solaris::hotspot_sigmask(thread); 1141 1142 return true; 1143 } 1144 1145 bool os::create_main_thread(JavaThread* thread) { 1146 #ifdef ASSERT 1147 thread->verify_not_published(); 1148 #endif 1149 if (_starting_thread == NULL) { 1150 _starting_thread = create_os_thread(thread, main_thread); 1151 if (_starting_thread == NULL) { 1152 return false; 1153 } 1154 } 1155 1156 // The primodial thread is runnable from the start 1157 _starting_thread->set_state(RUNNABLE); 1158 1159 thread->set_osthread(_starting_thread); 1160 1161 // initialize signal mask for this thread 1162 // and save the caller's signal mask 1163 os::Solaris::hotspot_sigmask(thread); 1164 1165 return true; 1166 } 1167 1168 // _T2_libthread is true if we believe we are running with the newer 1169 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1170 bool os::Solaris::_T2_libthread = false; 1171 1172 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1173 // Allocate the OSThread object 1174 OSThread* osthread = new OSThread(NULL, NULL); 1175 if (osthread == NULL) { 1176 return false; 1177 } 1178 1179 if ( ThreadPriorityVerbose ) { 1180 char *thrtyp; 1181 switch ( thr_type ) { 1182 case vm_thread: 1183 thrtyp = (char *)"vm"; 1184 break; 1185 case cgc_thread: 1186 thrtyp = (char *)"cgc"; 1187 break; 1188 case pgc_thread: 1189 thrtyp = (char *)"pgc"; 1190 break; 1191 case java_thread: 1192 thrtyp = (char *)"java"; 1193 break; 1194 case compiler_thread: 1195 thrtyp = (char *)"compiler"; 1196 break; 1197 case watcher_thread: 1198 thrtyp = (char *)"watcher"; 1199 break; 1200 default: 1201 thrtyp = (char *)"unknown"; 1202 break; 1203 } 1204 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1205 } 1206 1207 // Calculate stack size if it's not specified by caller. 1208 if (stack_size == 0) { 1209 // The default stack size 1M (2M for LP64). 1210 stack_size = (BytesPerWord >> 2) * K * K; 1211 1212 switch (thr_type) { 1213 case os::java_thread: 1214 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1215 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1216 break; 1217 case os::compiler_thread: 1218 if (CompilerThreadStackSize > 0) { 1219 stack_size = (size_t)(CompilerThreadStackSize * K); 1220 break; 1221 } // else fall through: 1222 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1223 case os::vm_thread: 1224 case os::pgc_thread: 1225 case os::cgc_thread: 1226 case os::watcher_thread: 1227 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1228 break; 1229 } 1230 } 1231 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1232 1233 // Initial state is ALLOCATED but not INITIALIZED 1234 osthread->set_state(ALLOCATED); 1235 1236 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1237 // We got lots of threads. Check if we still have some address space left. 1238 // Need to be at least 5Mb of unreserved address space. We do check by 1239 // trying to reserve some. 1240 const size_t VirtualMemoryBangSize = 20*K*K; 1241 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1242 if (mem == NULL) { 1243 delete osthread; 1244 return false; 1245 } else { 1246 // Release the memory again 1247 os::release_memory(mem, VirtualMemoryBangSize); 1248 } 1249 } 1250 1251 // Setup osthread because the child thread may need it. 1252 thread->set_osthread(osthread); 1253 1254 // Create the Solaris thread 1255 // explicit THR_BOUND for T2_libthread case in case 1256 // that assumption is not accurate, but our alternate signal stack 1257 // handling is based on it which must have bound threads 1258 thread_t tid = 0; 1259 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1260 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1261 (thr_type == vm_thread) || 1262 (thr_type == cgc_thread) || 1263 (thr_type == pgc_thread) || 1264 (thr_type == compiler_thread && BackgroundCompilation)) ? 1265 THR_BOUND : 0); 1266 int status; 1267 1268 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1269 // 1270 // On multiprocessors systems, libthread sometimes under-provisions our 1271 // process with LWPs. On a 30-way systems, for instance, we could have 1272 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1273 // to our process. This can result in under utilization of PEs. 1274 // I suspect the problem is related to libthread's LWP 1275 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1276 // upcall policy. 1277 // 1278 // The following code is palliative -- it attempts to ensure that our 1279 // process has sufficient LWPs to take advantage of multiple PEs. 1280 // Proper long-term cures include using user-level threads bound to LWPs 1281 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1282 // slight timing window with respect to sampling _os_thread_count, but 1283 // the race is benign. Also, we should periodically recompute 1284 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1285 // the number of PEs in our partition. You might be tempted to use 1286 // THR_NEW_LWP here, but I'd recommend against it as that could 1287 // result in undesirable growth of the libthread's LWP pool. 1288 // The fix below isn't sufficient; for instance, it doesn't take into count 1289 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1290 // 1291 // Some pathologies this scheme doesn't handle: 1292 // * Threads can block, releasing the LWPs. The LWPs can age out. 1293 // When a large number of threads become ready again there aren't 1294 // enough LWPs available to service them. This can occur when the 1295 // number of ready threads oscillates. 1296 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1297 // 1298 // Finally, we should call thr_setconcurrency() periodically to refresh 1299 // the LWP pool and thwart the LWP age-out mechanism. 1300 // The "+3" term provides a little slop -- we want to slightly overprovision. 1301 1302 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1303 if (!(flags & THR_BOUND)) { 1304 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1305 } 1306 } 1307 // Although this doesn't hurt, we should warn of undefined behavior 1308 // when using unbound T1 threads with schedctl(). This should never 1309 // happen, as the compiler and VM threads are always created bound 1310 DEBUG_ONLY( 1311 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1312 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1313 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1314 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1315 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1316 } 1317 ); 1318 1319 1320 // Mark that we don't have an lwp or thread id yet. 1321 // In case we attempt to set the priority before the thread starts. 1322 osthread->set_lwp_id(-1); 1323 osthread->set_thread_id(-1); 1324 1325 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1326 if (status != 0) { 1327 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1328 perror("os::create_thread"); 1329 } 1330 thread->set_osthread(NULL); 1331 // Need to clean up stuff we've allocated so far 1332 delete osthread; 1333 return false; 1334 } 1335 1336 Atomic::inc(&os::Solaris::_os_thread_count); 1337 1338 // Store info on the Solaris thread into the OSThread 1339 osthread->set_thread_id(tid); 1340 1341 // Remember that we created this thread so we can set priority on it 1342 osthread->set_vm_created(); 1343 1344 // Set the default thread priority. If using bound threads, setting 1345 // lwp priority will be delayed until thread start. 1346 set_native_priority(thread, 1347 DefaultThreadPriority == -1 ? 1348 java_to_os_priority[NormPriority] : 1349 DefaultThreadPriority); 1350 1351 // Initial thread state is INITIALIZED, not SUSPENDED 1352 osthread->set_state(INITIALIZED); 1353 1354 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1355 return true; 1356 } 1357 1358 /* defined for >= Solaris 10. This allows builds on earlier versions 1359 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1360 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1361 * and -XX:+UseAltSigs does nothing since these should have no conflict 1362 */ 1363 #if !defined(SIGJVM1) 1364 #define SIGJVM1 39 1365 #define SIGJVM2 40 1366 #endif 1367 1368 debug_only(static bool signal_sets_initialized = false); 1369 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1370 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1371 int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1372 1373 bool os::Solaris::is_sig_ignored(int sig) { 1374 struct sigaction oact; 1375 sigaction(sig, (struct sigaction*)NULL, &oact); 1376 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1377 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1378 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1379 return true; 1380 else 1381 return false; 1382 } 1383 1384 // Note: SIGRTMIN is a macro that calls sysconf() so it will 1385 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1386 static bool isJVM1available() { 1387 return SIGJVM1 < SIGRTMIN; 1388 } 1389 1390 void os::Solaris::signal_sets_init() { 1391 // Should also have an assertion stating we are still single-threaded. 1392 assert(!signal_sets_initialized, "Already initialized"); 1393 // Fill in signals that are necessarily unblocked for all threads in 1394 // the VM. Currently, we unblock the following signals: 1395 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1396 // by -Xrs (=ReduceSignalUsage)); 1397 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1398 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1399 // the dispositions or masks wrt these signals. 1400 // Programs embedding the VM that want to use the above signals for their 1401 // own purposes must, at this time, use the "-Xrs" option to prevent 1402 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1403 // (See bug 4345157, and other related bugs). 1404 // In reality, though, unblocking these signals is really a nop, since 1405 // these signals are not blocked by default. 1406 sigemptyset(&unblocked_sigs); 1407 sigemptyset(&allowdebug_blocked_sigs); 1408 sigaddset(&unblocked_sigs, SIGILL); 1409 sigaddset(&unblocked_sigs, SIGSEGV); 1410 sigaddset(&unblocked_sigs, SIGBUS); 1411 sigaddset(&unblocked_sigs, SIGFPE); 1412 1413 if (isJVM1available) { 1414 os::Solaris::set_SIGinterrupt(SIGJVM1); 1415 os::Solaris::set_SIGasync(SIGJVM2); 1416 } else if (UseAltSigs) { 1417 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1418 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1419 } else { 1420 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1421 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1422 } 1423 1424 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1425 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1426 1427 if (!ReduceSignalUsage) { 1428 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1429 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1430 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1431 } 1432 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1433 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1434 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1435 } 1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1437 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1439 } 1440 } 1441 // Fill in signals that are blocked by all but the VM thread. 1442 sigemptyset(&vm_sigs); 1443 if (!ReduceSignalUsage) 1444 sigaddset(&vm_sigs, BREAK_SIGNAL); 1445 debug_only(signal_sets_initialized = true); 1446 1447 // For diagnostics only used in run_periodic_checks 1448 sigemptyset(&check_signal_done); 1449 } 1450 1451 // These are signals that are unblocked while a thread is running Java. 1452 // (For some reason, they get blocked by default.) 1453 sigset_t* os::Solaris::unblocked_signals() { 1454 assert(signal_sets_initialized, "Not initialized"); 1455 return &unblocked_sigs; 1456 } 1457 1458 // These are the signals that are blocked while a (non-VM) thread is 1459 // running Java. Only the VM thread handles these signals. 1460 sigset_t* os::Solaris::vm_signals() { 1461 assert(signal_sets_initialized, "Not initialized"); 1462 return &vm_sigs; 1463 } 1464 1465 // These are signals that are blocked during cond_wait to allow debugger in 1466 sigset_t* os::Solaris::allowdebug_blocked_signals() { 1467 assert(signal_sets_initialized, "Not initialized"); 1468 return &allowdebug_blocked_sigs; 1469 } 1470 1471 1472 void _handle_uncaught_cxx_exception() { 1473 VMError err("An uncaught C++ exception"); 1474 err.report_and_die(); 1475 } 1476 1477 1478 // First crack at OS-specific initialization, from inside the new thread. 1479 void os::initialize_thread(Thread* thr) { 1480 int r = thr_main() ; 1481 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1482 if (r) { 1483 JavaThread* jt = (JavaThread *)thr; 1484 assert(jt != NULL,"Sanity check"); 1485 size_t stack_size; 1486 address base = jt->stack_base(); 1487 if (Arguments::created_by_java_launcher()) { 1488 // Use 2MB to allow for Solaris 7 64 bit mode. 1489 stack_size = JavaThread::stack_size_at_create() == 0 1490 ? 2048*K : JavaThread::stack_size_at_create(); 1491 1492 // There are rare cases when we may have already used more than 1493 // the basic stack size allotment before this method is invoked. 1494 // Attempt to allow for a normally sized java_stack. 1495 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1496 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1497 } else { 1498 // 6269555: If we were not created by a Java launcher, i.e. if we are 1499 // running embedded in a native application, treat the primordial thread 1500 // as much like a native attached thread as possible. This means using 1501 // the current stack size from thr_stksegment(), unless it is too large 1502 // to reliably setup guard pages. A reasonable max size is 8MB. 1503 size_t current_size = current_stack_size(); 1504 // This should never happen, but just in case.... 1505 if (current_size == 0) current_size = 2 * K * K; 1506 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1507 } 1508 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1509 stack_size = (size_t)(base - bottom); 1510 1511 assert(stack_size > 0, "Stack size calculation problem"); 1512 1513 if (stack_size > jt->stack_size()) { 1514 NOT_PRODUCT( 1515 struct rlimit limits; 1516 getrlimit(RLIMIT_STACK, &limits); 1517 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1518 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1519 ) 1520 tty->print_cr( 1521 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1522 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1523 "See limit(1) to increase the stack size limit.", 1524 stack_size / K, jt->stack_size() / K); 1525 vm_exit(1); 1526 } 1527 assert(jt->stack_size() >= stack_size, 1528 "Attempt to map more stack than was allocated"); 1529 jt->set_stack_size(stack_size); 1530 } 1531 1532 // 5/22/01: Right now alternate signal stacks do not handle 1533 // throwing stack overflow exceptions, see bug 4463178 1534 // Until a fix is found for this, T2 will NOT imply alternate signal 1535 // stacks. 1536 // If using T2 libthread threads, install an alternate signal stack. 1537 // Because alternate stacks associate with LWPs on Solaris, 1538 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1539 // we prefer to explicitly stack bang. 1540 // If not using T2 libthread, but using UseBoundThreads any threads 1541 // (primordial thread, jni_attachCurrentThread) we do not create, 1542 // probably are not bound, therefore they can not have an alternate 1543 // signal stack. Since our stack banging code is generated and 1544 // is shared across threads, all threads must be bound to allow 1545 // using alternate signal stacks. The alternative is to interpose 1546 // on _lwp_create to associate an alt sig stack with each LWP, 1547 // and this could be a problem when the JVM is embedded. 1548 // We would prefer to use alternate signal stacks with T2 1549 // Since there is currently no accurate way to detect T2 1550 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1551 // on installing alternate signal stacks 1552 1553 1554 // 05/09/03: removed alternate signal stack support for Solaris 1555 // The alternate signal stack mechanism is no longer needed to 1556 // handle stack overflow. This is now handled by allocating 1557 // guard pages (red zone) and stackbanging. 1558 // Initially the alternate signal stack mechanism was removed because 1559 // it did not work with T1 llibthread. Alternate 1560 // signal stacks MUST have all threads bound to lwps. Applications 1561 // can create their own threads and attach them without their being 1562 // bound under T1. This is frequently the case for the primordial thread. 1563 // If we were ever to reenable this mechanism we would need to 1564 // use the dynamic check for T2 libthread. 1565 1566 os::Solaris::init_thread_fpu_state(); 1567 std::set_terminate(_handle_uncaught_cxx_exception); 1568 } 1569 1570 1571 1572 // Free Solaris resources related to the OSThread 1573 void os::free_thread(OSThread* osthread) { 1574 assert(osthread != NULL, "os::free_thread but osthread not set"); 1575 1576 1577 // We are told to free resources of the argument thread, 1578 // but we can only really operate on the current thread. 1579 // The main thread must take the VMThread down synchronously 1580 // before the main thread exits and frees up CodeHeap 1581 guarantee((Thread::current()->osthread() == osthread 1582 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1583 if (Thread::current()->osthread() == osthread) { 1584 // Restore caller's signal mask 1585 sigset_t sigmask = osthread->caller_sigmask(); 1586 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1587 } 1588 delete osthread; 1589 } 1590 1591 void os::pd_start_thread(Thread* thread) { 1592 int status = thr_continue(thread->osthread()->thread_id()); 1593 assert_status(status == 0, status, "thr_continue failed"); 1594 } 1595 1596 1597 intx os::current_thread_id() { 1598 return (intx)thr_self(); 1599 } 1600 1601 static pid_t _initial_pid = 0; 1602 1603 int os::current_process_id() { 1604 return (int)(_initial_pid ? _initial_pid : getpid()); 1605 } 1606 1607 int os::allocate_thread_local_storage() { 1608 // %%% in Win32 this allocates a memory segment pointed to by a 1609 // register. Dan Stein can implement a similar feature in 1610 // Solaris. Alternatively, the VM can do the same thing 1611 // explicitly: malloc some storage and keep the pointer in a 1612 // register (which is part of the thread's context) (or keep it 1613 // in TLS). 1614 // %%% In current versions of Solaris, thr_self and TSD can 1615 // be accessed via short sequences of displaced indirections. 1616 // The value of thr_self is available as %g7(36). 1617 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1618 // assuming that the current thread already has a value bound to k. 1619 // It may be worth experimenting with such access patterns, 1620 // and later having the parameters formally exported from a Solaris 1621 // interface. I think, however, that it will be faster to 1622 // maintain the invariant that %g2 always contains the 1623 // JavaThread in Java code, and have stubs simply 1624 // treat %g2 as a caller-save register, preserving it in a %lN. 1625 thread_key_t tk; 1626 if (thr_keycreate( &tk, NULL ) ) 1627 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1628 "(%s)", strerror(errno))); 1629 return int(tk); 1630 } 1631 1632 void os::free_thread_local_storage(int index) { 1633 // %%% don't think we need anything here 1634 // if ( pthread_key_delete((pthread_key_t) tk) ) 1635 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1636 } 1637 1638 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1639 // small number - point is NO swap space available 1640 void os::thread_local_storage_at_put(int index, void* value) { 1641 // %%% this is used only in threadLocalStorage.cpp 1642 if (thr_setspecific((thread_key_t)index, value)) { 1643 if (errno == ENOMEM) { 1644 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1645 } else { 1646 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1647 "(%s)", strerror(errno))); 1648 } 1649 } else { 1650 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1651 } 1652 } 1653 1654 // This function could be called before TLS is initialized, for example, when 1655 // VM receives an async signal or when VM causes a fatal error during 1656 // initialization. Return NULL if thr_getspecific() fails. 1657 void* os::thread_local_storage_at(int index) { 1658 // %%% this is used only in threadLocalStorage.cpp 1659 void* r = NULL; 1660 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1661 } 1662 1663 1664 // gethrtime can move backwards if read from one cpu and then a different cpu 1665 // getTimeNanos is guaranteed to not move backward on Solaris 1666 // local spinloop created as faster for a CAS on an int than 1667 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1668 // supported on sparc v8 or pre supports_cx8 intel boxes. 1669 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1670 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1671 inline hrtime_t oldgetTimeNanos() { 1672 int gotlock = LOCK_INVALID; 1673 hrtime_t newtime = gethrtime(); 1674 1675 for (;;) { 1676 // grab lock for max_hrtime 1677 int curlock = max_hrtime_lock; 1678 if (curlock & LOCK_BUSY) continue; 1679 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1680 if (newtime > max_hrtime) { 1681 max_hrtime = newtime; 1682 } else { 1683 newtime = max_hrtime; 1684 } 1685 // release lock 1686 max_hrtime_lock = LOCK_FREE; 1687 return newtime; 1688 } 1689 } 1690 // gethrtime can move backwards if read from one cpu and then a different cpu 1691 // getTimeNanos is guaranteed to not move backward on Solaris 1692 inline hrtime_t getTimeNanos() { 1693 if (VM_Version::supports_cx8()) { 1694 const hrtime_t now = gethrtime(); 1695 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1696 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1697 if (now <= prev) return prev; // same or retrograde time; 1698 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1699 assert(obsv >= prev, "invariant"); // Monotonicity 1700 // If the CAS succeeded then we're done and return "now". 1701 // If the CAS failed and the observed value "obs" is >= now then 1702 // we should return "obs". If the CAS failed and now > obs > prv then 1703 // some other thread raced this thread and installed a new value, in which case 1704 // we could either (a) retry the entire operation, (b) retry trying to install now 1705 // or (c) just return obs. We use (c). No loop is required although in some cases 1706 // we might discard a higher "now" value in deference to a slightly lower but freshly 1707 // installed obs value. That's entirely benign -- it admits no new orderings compared 1708 // to (a) or (b) -- and greatly reduces coherence traffic. 1709 // We might also condition (c) on the magnitude of the delta between obs and now. 1710 // Avoiding excessive CAS operations to hot RW locations is critical. 1711 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1712 return (prev == obsv) ? now : obsv ; 1713 } else { 1714 return oldgetTimeNanos(); 1715 } 1716 } 1717 1718 // Time since start-up in seconds to a fine granularity. 1719 // Used by VMSelfDestructTimer and the MemProfiler. 1720 double os::elapsedTime() { 1721 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1722 } 1723 1724 jlong os::elapsed_counter() { 1725 return (jlong)(getTimeNanos() - first_hrtime); 1726 } 1727 1728 jlong os::elapsed_frequency() { 1729 return hrtime_hz; 1730 } 1731 1732 // Return the real, user, and system times in seconds from an 1733 // arbitrary fixed point in the past. 1734 bool os::getTimesSecs(double* process_real_time, 1735 double* process_user_time, 1736 double* process_system_time) { 1737 struct tms ticks; 1738 clock_t real_ticks = times(&ticks); 1739 1740 if (real_ticks == (clock_t) (-1)) { 1741 return false; 1742 } else { 1743 double ticks_per_second = (double) clock_tics_per_sec; 1744 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1745 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1746 // For consistency return the real time from getTimeNanos() 1747 // converted to seconds. 1748 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1749 1750 return true; 1751 } 1752 } 1753 1754 bool os::supports_vtime() { return true; } 1755 1756 bool os::enable_vtime() { 1757 int fd = ::open("/proc/self/ctl", O_WRONLY); 1758 if (fd == -1) 1759 return false; 1760 1761 long cmd[] = { PCSET, PR_MSACCT }; 1762 int res = ::write(fd, cmd, sizeof(long) * 2); 1763 ::close(fd); 1764 if (res != sizeof(long) * 2) 1765 return false; 1766 1767 return true; 1768 } 1769 1770 bool os::vtime_enabled() { 1771 int fd = ::open("/proc/self/status", O_RDONLY); 1772 if (fd == -1) 1773 return false; 1774 1775 pstatus_t status; 1776 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1777 ::close(fd); 1778 if (res != sizeof(pstatus_t)) 1779 return false; 1780 1781 return status.pr_flags & PR_MSACCT; 1782 } 1783 1784 double os::elapsedVTime() { 1785 return (double)gethrvtime() / (double)hrtime_hz; 1786 } 1787 1788 // Used internally for comparisons only 1789 // getTimeMillis guaranteed to not move backwards on Solaris 1790 jlong getTimeMillis() { 1791 jlong nanotime = getTimeNanos(); 1792 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1793 } 1794 1795 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1796 jlong os::javaTimeMillis() { 1797 timeval t; 1798 if (gettimeofday( &t, NULL) == -1) 1799 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1800 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1801 } 1802 1803 jlong os::javaTimeNanos() { 1804 return (jlong)getTimeNanos(); 1805 } 1806 1807 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1808 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1809 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1810 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1811 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1812 } 1813 1814 char * os::local_time_string(char *buf, size_t buflen) { 1815 struct tm t; 1816 time_t long_time; 1817 time(&long_time); 1818 localtime_r(&long_time, &t); 1819 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1820 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1821 t.tm_hour, t.tm_min, t.tm_sec); 1822 return buf; 1823 } 1824 1825 // Note: os::shutdown() might be called very early during initialization, or 1826 // called from signal handler. Before adding something to os::shutdown(), make 1827 // sure it is async-safe and can handle partially initialized VM. 1828 void os::shutdown() { 1829 1830 // allow PerfMemory to attempt cleanup of any persistent resources 1831 perfMemory_exit(); 1832 1833 // needs to remove object in file system 1834 AttachListener::abort(); 1835 1836 // flush buffered output, finish log files 1837 ostream_abort(); 1838 1839 // Check for abort hook 1840 abort_hook_t abort_hook = Arguments::abort_hook(); 1841 if (abort_hook != NULL) { 1842 abort_hook(); 1843 } 1844 } 1845 1846 // Note: os::abort() might be called very early during initialization, or 1847 // called from signal handler. Before adding something to os::abort(), make 1848 // sure it is async-safe and can handle partially initialized VM. 1849 void os::abort(bool dump_core) { 1850 os::shutdown(); 1851 if (dump_core) { 1852 #ifndef PRODUCT 1853 fdStream out(defaultStream::output_fd()); 1854 out.print_raw("Current thread is "); 1855 char buf[16]; 1856 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1857 out.print_raw_cr(buf); 1858 out.print_raw_cr("Dumping core ..."); 1859 #endif 1860 ::abort(); // dump core (for debugging) 1861 } 1862 1863 ::exit(1); 1864 } 1865 1866 // Die immediately, no exit hook, no abort hook, no cleanup. 1867 void os::die() { 1868 _exit(-1); 1869 } 1870 1871 // unused 1872 void os::set_error_file(const char *logfile) {} 1873 1874 // DLL functions 1875 1876 const char* os::dll_file_extension() { return ".so"; } 1877 1878 // This must be hard coded because it's the system's temporary 1879 // directory not the java application's temp directory, ala java.io.tmpdir. 1880 const char* os::get_temp_directory() { return "/tmp"; } 1881 1882 static bool file_exists(const char* filename) { 1883 struct stat statbuf; 1884 if (filename == NULL || strlen(filename) == 0) { 1885 return false; 1886 } 1887 return os::stat(filename, &statbuf) == 0; 1888 } 1889 1890 bool os::dll_build_name(char* buffer, size_t buflen, 1891 const char* pname, const char* fname) { 1892 bool retval = false; 1893 const size_t pnamelen = pname ? strlen(pname) : 0; 1894 1895 // Return error on buffer overflow. 1896 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1897 return retval; 1898 } 1899 1900 if (pnamelen == 0) { 1901 snprintf(buffer, buflen, "lib%s.so", fname); 1902 retval = true; 1903 } else if (strchr(pname, *os::path_separator()) != NULL) { 1904 int n; 1905 char** pelements = split_path(pname, &n); 1906 for (int i = 0 ; i < n ; i++) { 1907 // really shouldn't be NULL but what the heck, check can't hurt 1908 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1909 continue; // skip the empty path values 1910 } 1911 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1912 if (file_exists(buffer)) { 1913 retval = true; 1914 break; 1915 } 1916 } 1917 // release the storage 1918 for (int i = 0 ; i < n ; i++) { 1919 if (pelements[i] != NULL) { 1920 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1921 } 1922 } 1923 if (pelements != NULL) { 1924 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1925 } 1926 } else { 1927 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1928 retval = true; 1929 } 1930 return retval; 1931 } 1932 1933 const char* os::get_current_directory(char *buf, int buflen) { 1934 return getcwd(buf, buflen); 1935 } 1936 1937 // check if addr is inside libjvm[_g].so 1938 bool os::address_is_in_vm(address addr) { 1939 static address libjvm_base_addr; 1940 Dl_info dlinfo; 1941 1942 if (libjvm_base_addr == NULL) { 1943 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1944 libjvm_base_addr = (address)dlinfo.dli_fbase; 1945 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1946 } 1947 1948 if (dladdr((void *)addr, &dlinfo)) { 1949 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1950 } 1951 1952 return false; 1953 } 1954 1955 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1956 static dladdr1_func_type dladdr1_func = NULL; 1957 1958 bool os::dll_address_to_function_name(address addr, char *buf, 1959 int buflen, int * offset) { 1960 Dl_info dlinfo; 1961 1962 // dladdr1_func was initialized in os::init() 1963 if (dladdr1_func){ 1964 // yes, we have dladdr1 1965 1966 // Support for dladdr1 is checked at runtime; it may be 1967 // available even if the vm is built on a machine that does 1968 // not have dladdr1 support. Make sure there is a value for 1969 // RTLD_DL_SYMENT. 1970 #ifndef RTLD_DL_SYMENT 1971 #define RTLD_DL_SYMENT 1 1972 #endif 1973 #ifdef _LP64 1974 Elf64_Sym * info; 1975 #else 1976 Elf32_Sym * info; 1977 #endif 1978 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1979 RTLD_DL_SYMENT)) { 1980 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1981 if (buf != NULL) { 1982 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1983 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1984 } 1985 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1986 return true; 1987 } 1988 } 1989 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1990 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1991 buf, buflen, offset, dlinfo.dli_fname)) { 1992 return true; 1993 } 1994 } 1995 if (buf != NULL) buf[0] = '\0'; 1996 if (offset != NULL) *offset = -1; 1997 return false; 1998 } else { 1999 // no, only dladdr is available 2000 if (dladdr((void *)addr, &dlinfo)) { 2001 if (buf != NULL) { 2002 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2003 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2004 } 2005 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2006 return true; 2007 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2008 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2009 buf, buflen, offset, dlinfo.dli_fname)) { 2010 return true; 2011 } 2012 } 2013 if (buf != NULL) buf[0] = '\0'; 2014 if (offset != NULL) *offset = -1; 2015 return false; 2016 } 2017 } 2018 2019 bool os::dll_address_to_library_name(address addr, char* buf, 2020 int buflen, int* offset) { 2021 Dl_info dlinfo; 2022 2023 if (dladdr((void*)addr, &dlinfo)){ 2024 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2025 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2026 return true; 2027 } else { 2028 if (buf) buf[0] = '\0'; 2029 if (offset) *offset = -1; 2030 return false; 2031 } 2032 } 2033 2034 // Prints the names and full paths of all opened dynamic libraries 2035 // for current process 2036 void os::print_dll_info(outputStream * st) { 2037 Dl_info dli; 2038 void *handle; 2039 Link_map *map; 2040 Link_map *p; 2041 2042 st->print_cr("Dynamic libraries:"); st->flush(); 2043 2044 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2045 st->print_cr("Error: Cannot print dynamic libraries."); 2046 return; 2047 } 2048 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2049 if (handle == NULL) { 2050 st->print_cr("Error: Cannot print dynamic libraries."); 2051 return; 2052 } 2053 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2054 if (map == NULL) { 2055 st->print_cr("Error: Cannot print dynamic libraries."); 2056 return; 2057 } 2058 2059 while (map->l_prev != NULL) 2060 map = map->l_prev; 2061 2062 while (map != NULL) { 2063 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2064 map = map->l_next; 2065 } 2066 2067 dlclose(handle); 2068 } 2069 2070 // Loads .dll/.so and 2071 // in case of error it checks if .dll/.so was built for the 2072 // same architecture as Hotspot is running on 2073 2074 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2075 { 2076 void * result= ::dlopen(filename, RTLD_LAZY); 2077 if (result != NULL) { 2078 // Successful loading 2079 return result; 2080 } 2081 2082 Elf32_Ehdr elf_head; 2083 2084 // Read system error message into ebuf 2085 // It may or may not be overwritten below 2086 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2087 ebuf[ebuflen-1]='\0'; 2088 int diag_msg_max_length=ebuflen-strlen(ebuf); 2089 char* diag_msg_buf=ebuf+strlen(ebuf); 2090 2091 if (diag_msg_max_length==0) { 2092 // No more space in ebuf for additional diagnostics message 2093 return NULL; 2094 } 2095 2096 2097 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2098 2099 if (file_descriptor < 0) { 2100 // Can't open library, report dlerror() message 2101 return NULL; 2102 } 2103 2104 bool failed_to_read_elf_head= 2105 (sizeof(elf_head)!= 2106 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2107 2108 ::close(file_descriptor); 2109 if (failed_to_read_elf_head) { 2110 // file i/o error - report dlerror() msg 2111 return NULL; 2112 } 2113 2114 typedef struct { 2115 Elf32_Half code; // Actual value as defined in elf.h 2116 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2117 char elf_class; // 32 or 64 bit 2118 char endianess; // MSB or LSB 2119 char* name; // String representation 2120 } arch_t; 2121 2122 static const arch_t arch_array[]={ 2123 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2124 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2125 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2126 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2127 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2128 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2129 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2130 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2131 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2132 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2133 }; 2134 2135 #if (defined IA32) 2136 static Elf32_Half running_arch_code=EM_386; 2137 #elif (defined AMD64) 2138 static Elf32_Half running_arch_code=EM_X86_64; 2139 #elif (defined IA64) 2140 static Elf32_Half running_arch_code=EM_IA_64; 2141 #elif (defined __sparc) && (defined _LP64) 2142 static Elf32_Half running_arch_code=EM_SPARCV9; 2143 #elif (defined __sparc) && (!defined _LP64) 2144 static Elf32_Half running_arch_code=EM_SPARC; 2145 #elif (defined __powerpc64__) 2146 static Elf32_Half running_arch_code=EM_PPC64; 2147 #elif (defined __powerpc__) 2148 static Elf32_Half running_arch_code=EM_PPC; 2149 #elif (defined ARM) 2150 static Elf32_Half running_arch_code=EM_ARM; 2151 #else 2152 #error Method os::dll_load requires that one of following is defined:\ 2153 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2154 #endif 2155 2156 // Identify compatability class for VM's architecture and library's architecture 2157 // Obtain string descriptions for architectures 2158 2159 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2160 int running_arch_index=-1; 2161 2162 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2163 if (running_arch_code == arch_array[i].code) { 2164 running_arch_index = i; 2165 } 2166 if (lib_arch.code == arch_array[i].code) { 2167 lib_arch.compat_class = arch_array[i].compat_class; 2168 lib_arch.name = arch_array[i].name; 2169 } 2170 } 2171 2172 assert(running_arch_index != -1, 2173 "Didn't find running architecture code (running_arch_code) in arch_array"); 2174 if (running_arch_index == -1) { 2175 // Even though running architecture detection failed 2176 // we may still continue with reporting dlerror() message 2177 return NULL; 2178 } 2179 2180 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2181 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2182 return NULL; 2183 } 2184 2185 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2187 return NULL; 2188 } 2189 2190 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2191 if ( lib_arch.name!=NULL ) { 2192 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2193 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2194 lib_arch.name, arch_array[running_arch_index].name); 2195 } else { 2196 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2197 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2198 lib_arch.code, 2199 arch_array[running_arch_index].name); 2200 } 2201 } 2202 2203 return NULL; 2204 } 2205 2206 void* os::dll_lookup(void* handle, const char* name) { 2207 return dlsym(handle, name); 2208 } 2209 2210 int os::stat(const char *path, struct stat *sbuf) { 2211 char pathbuf[MAX_PATH]; 2212 if (strlen(path) > MAX_PATH - 1) { 2213 errno = ENAMETOOLONG; 2214 return -1; 2215 } 2216 os::native_path(strcpy(pathbuf, path)); 2217 return ::stat(pathbuf, sbuf); 2218 } 2219 2220 static bool _print_ascii_file(const char* filename, outputStream* st) { 2221 int fd = ::open(filename, O_RDONLY); 2222 if (fd == -1) { 2223 return false; 2224 } 2225 2226 char buf[32]; 2227 int bytes; 2228 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2229 st->print_raw(buf, bytes); 2230 } 2231 2232 ::close(fd); 2233 2234 return true; 2235 } 2236 2237 void os::print_os_info_brief(outputStream* st) { 2238 os::Solaris::print_distro_info(st); 2239 2240 os::Posix::print_uname_info(st); 2241 2242 os::Solaris::print_libversion_info(st); 2243 } 2244 2245 void os::print_os_info(outputStream* st) { 2246 st->print("OS:"); 2247 2248 os::Solaris::print_distro_info(st); 2249 2250 os::Posix::print_uname_info(st); 2251 2252 os::Solaris::print_libversion_info(st); 2253 2254 os::Posix::print_rlimit_info(st); 2255 2256 os::Posix::print_load_average(st); 2257 } 2258 2259 void os::Solaris::print_distro_info(outputStream* st) { 2260 if (!_print_ascii_file("/etc/release", st)) { 2261 st->print("Solaris"); 2262 } 2263 st->cr(); 2264 } 2265 2266 void os::Solaris::print_libversion_info(outputStream* st) { 2267 if (os::Solaris::T2_libthread()) { 2268 st->print(" (T2 libthread)"); 2269 } 2270 else { 2271 st->print(" (T1 libthread)"); 2272 } 2273 st->cr(); 2274 } 2275 2276 static bool check_addr0(outputStream* st) { 2277 jboolean status = false; 2278 int fd = ::open("/proc/self/map",O_RDONLY); 2279 if (fd >= 0) { 2280 prmap_t p; 2281 while(::read(fd, &p, sizeof(p)) > 0) { 2282 if (p.pr_vaddr == 0x0) { 2283 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2284 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2285 st->print("Access:"); 2286 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2287 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2288 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2289 st->cr(); 2290 status = true; 2291 } 2292 ::close(fd); 2293 } 2294 } 2295 return status; 2296 } 2297 2298 void os::pd_print_cpu_info(outputStream* st) { 2299 // Nothing to do for now. 2300 } 2301 2302 void os::print_memory_info(outputStream* st) { 2303 st->print("Memory:"); 2304 st->print(" %dk page", os::vm_page_size()>>10); 2305 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2306 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2307 st->cr(); 2308 (void) check_addr0(st); 2309 } 2310 2311 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2312 // but they're the same for all the solaris architectures that we support. 2313 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2314 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2315 "ILL_COPROC", "ILL_BADSTK" }; 2316 2317 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2318 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2319 "FPE_FLTINV", "FPE_FLTSUB" }; 2320 2321 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2322 2323 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2324 2325 void os::print_siginfo(outputStream* st, void* siginfo) { 2326 st->print("siginfo:"); 2327 2328 const int buflen = 100; 2329 char buf[buflen]; 2330 siginfo_t *si = (siginfo_t*)siginfo; 2331 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2332 char *err = strerror(si->si_errno); 2333 if (si->si_errno != 0 && err != NULL) { 2334 st->print("si_errno=%s", err); 2335 } else { 2336 st->print("si_errno=%d", si->si_errno); 2337 } 2338 const int c = si->si_code; 2339 assert(c > 0, "unexpected si_code"); 2340 switch (si->si_signo) { 2341 case SIGILL: 2342 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2343 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2344 break; 2345 case SIGFPE: 2346 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2347 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2348 break; 2349 case SIGSEGV: 2350 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2351 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2352 break; 2353 case SIGBUS: 2354 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2355 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2356 break; 2357 default: 2358 st->print(", si_code=%d", si->si_code); 2359 // no si_addr 2360 } 2361 2362 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2363 UseSharedSpaces) { 2364 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2365 if (mapinfo->is_in_shared_space(si->si_addr)) { 2366 st->print("\n\nError accessing class data sharing archive." \ 2367 " Mapped file inaccessible during execution, " \ 2368 " possible disk/network problem."); 2369 } 2370 } 2371 st->cr(); 2372 } 2373 2374 // Moved from whole group, because we need them here for diagnostic 2375 // prints. 2376 #define OLDMAXSIGNUM 32 2377 static int Maxsignum = 0; 2378 static int *ourSigFlags = NULL; 2379 2380 extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2381 2382 int os::Solaris::get_our_sigflags(int sig) { 2383 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2384 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2385 return ourSigFlags[sig]; 2386 } 2387 2388 void os::Solaris::set_our_sigflags(int sig, int flags) { 2389 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2390 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2391 ourSigFlags[sig] = flags; 2392 } 2393 2394 2395 static const char* get_signal_handler_name(address handler, 2396 char* buf, int buflen) { 2397 int offset; 2398 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2399 if (found) { 2400 // skip directory names 2401 const char *p1, *p2; 2402 p1 = buf; 2403 size_t len = strlen(os::file_separator()); 2404 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2405 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2406 } else { 2407 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2408 } 2409 return buf; 2410 } 2411 2412 static void print_signal_handler(outputStream* st, int sig, 2413 char* buf, size_t buflen) { 2414 struct sigaction sa; 2415 2416 sigaction(sig, NULL, &sa); 2417 2418 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2419 2420 address handler = (sa.sa_flags & SA_SIGINFO) 2421 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2422 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2423 2424 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2425 st->print("SIG_DFL"); 2426 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2427 st->print("SIG_IGN"); 2428 } else { 2429 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2430 } 2431 2432 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2433 2434 address rh = VMError::get_resetted_sighandler(sig); 2435 // May be, handler was resetted by VMError? 2436 if(rh != NULL) { 2437 handler = rh; 2438 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2439 } 2440 2441 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2442 2443 // Check: is it our handler? 2444 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2445 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2446 // It is our signal handler 2447 // check for flags 2448 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2449 st->print( 2450 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2451 os::Solaris::get_our_sigflags(sig)); 2452 } 2453 } 2454 st->cr(); 2455 } 2456 2457 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2458 st->print_cr("Signal Handlers:"); 2459 print_signal_handler(st, SIGSEGV, buf, buflen); 2460 print_signal_handler(st, SIGBUS , buf, buflen); 2461 print_signal_handler(st, SIGFPE , buf, buflen); 2462 print_signal_handler(st, SIGPIPE, buf, buflen); 2463 print_signal_handler(st, SIGXFSZ, buf, buflen); 2464 print_signal_handler(st, SIGILL , buf, buflen); 2465 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2466 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2467 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2468 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2469 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2470 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2471 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2472 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2473 } 2474 2475 static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2476 2477 // Find the full path to the current module, libjvm.so or libjvm_g.so 2478 void os::jvm_path(char *buf, jint buflen) { 2479 // Error checking. 2480 if (buflen < MAXPATHLEN) { 2481 assert(false, "must use a large-enough buffer"); 2482 buf[0] = '\0'; 2483 return; 2484 } 2485 // Lazy resolve the path to current module. 2486 if (saved_jvm_path[0] != 0) { 2487 strcpy(buf, saved_jvm_path); 2488 return; 2489 } 2490 2491 Dl_info dlinfo; 2492 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2493 assert(ret != 0, "cannot locate libjvm"); 2494 realpath((char *)dlinfo.dli_fname, buf); 2495 2496 if (Arguments::created_by_gamma_launcher()) { 2497 // Support for the gamma launcher. Typical value for buf is 2498 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2499 // the right place in the string, then assume we are installed in a JDK and 2500 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2501 // up the path so it looks like libjvm.so is installed there (append a 2502 // fake suffix hotspot/libjvm.so). 2503 const char *p = buf + strlen(buf) - 1; 2504 for (int count = 0; p > buf && count < 5; ++count) { 2505 for (--p; p > buf && *p != '/'; --p) 2506 /* empty */ ; 2507 } 2508 2509 if (strncmp(p, "/jre/lib/", 9) != 0) { 2510 // Look for JAVA_HOME in the environment. 2511 char* java_home_var = ::getenv("JAVA_HOME"); 2512 if (java_home_var != NULL && java_home_var[0] != 0) { 2513 char cpu_arch[12]; 2514 char* jrelib_p; 2515 int len; 2516 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2517 #ifdef _LP64 2518 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2519 if (strcmp(cpu_arch, "sparc") == 0) { 2520 strcat(cpu_arch, "v9"); 2521 } else if (strcmp(cpu_arch, "i386") == 0) { 2522 strcpy(cpu_arch, "amd64"); 2523 } 2524 #endif 2525 // Check the current module name "libjvm.so" or "libjvm_g.so". 2526 p = strrchr(buf, '/'); 2527 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2528 p = strstr(p, "_g") ? "_g" : ""; 2529 2530 realpath(java_home_var, buf); 2531 // determine if this is a legacy image or modules image 2532 // modules image doesn't have "jre" subdirectory 2533 len = strlen(buf); 2534 jrelib_p = buf + len; 2535 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2536 if (0 != access(buf, F_OK)) { 2537 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2538 } 2539 2540 if (0 == access(buf, F_OK)) { 2541 // Use current module name "libjvm[_g].so" instead of 2542 // "libjvm"debug_only("_g")".so" since for fastdebug version 2543 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2544 len = strlen(buf); 2545 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p); 2546 } else { 2547 // Go back to path of .so 2548 realpath((char *)dlinfo.dli_fname, buf); 2549 } 2550 } 2551 } 2552 } 2553 2554 strcpy(saved_jvm_path, buf); 2555 } 2556 2557 2558 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2559 // no prefix required, not even "_" 2560 } 2561 2562 2563 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2564 // no suffix required 2565 } 2566 2567 // This method is a copy of JDK's sysGetLastErrorString 2568 // from src/solaris/hpi/src/system_md.c 2569 2570 size_t os::lasterror(char *buf, size_t len) { 2571 2572 if (errno == 0) return 0; 2573 2574 const char *s = ::strerror(errno); 2575 size_t n = ::strlen(s); 2576 if (n >= len) { 2577 n = len - 1; 2578 } 2579 ::strncpy(buf, s, n); 2580 buf[n] = '\0'; 2581 return n; 2582 } 2583 2584 2585 // sun.misc.Signal 2586 2587 extern "C" { 2588 static void UserHandler(int sig, void *siginfo, void *context) { 2589 // Ctrl-C is pressed during error reporting, likely because the error 2590 // handler fails to abort. Let VM die immediately. 2591 if (sig == SIGINT && is_error_reported()) { 2592 os::die(); 2593 } 2594 2595 os::signal_notify(sig); 2596 // We do not need to reinstate the signal handler each time... 2597 } 2598 } 2599 2600 void* os::user_handler() { 2601 return CAST_FROM_FN_PTR(void*, UserHandler); 2602 } 2603 2604 extern "C" { 2605 typedef void (*sa_handler_t)(int); 2606 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2607 } 2608 2609 void* os::signal(int signal_number, void* handler) { 2610 struct sigaction sigAct, oldSigAct; 2611 sigfillset(&(sigAct.sa_mask)); 2612 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2613 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2614 2615 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2616 // -1 means registration failed 2617 return (void *)-1; 2618 2619 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2620 } 2621 2622 void os::signal_raise(int signal_number) { 2623 raise(signal_number); 2624 } 2625 2626 /* 2627 * The following code is moved from os.cpp for making this 2628 * code platform specific, which it is by its very nature. 2629 */ 2630 2631 // a counter for each possible signal value 2632 static int Sigexit = 0; 2633 static int Maxlibjsigsigs; 2634 static jint *pending_signals = NULL; 2635 static int *preinstalled_sigs = NULL; 2636 static struct sigaction *chainedsigactions = NULL; 2637 static sema_t sig_sem; 2638 typedef int (*version_getting_t)(); 2639 version_getting_t os::Solaris::get_libjsig_version = NULL; 2640 static int libjsigversion = NULL; 2641 2642 int os::sigexitnum_pd() { 2643 assert(Sigexit > 0, "signal memory not yet initialized"); 2644 return Sigexit; 2645 } 2646 2647 void os::Solaris::init_signal_mem() { 2648 // Initialize signal structures 2649 Maxsignum = SIGRTMAX; 2650 Sigexit = Maxsignum+1; 2651 assert(Maxsignum >0, "Unable to obtain max signal number"); 2652 2653 Maxlibjsigsigs = Maxsignum; 2654 2655 // pending_signals has one int per signal 2656 // The additional signal is for SIGEXIT - exit signal to signal_thread 2657 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2658 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2659 2660 if (UseSignalChaining) { 2661 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2662 * (Maxsignum + 1), mtInternal); 2663 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2664 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2665 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2666 } 2667 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 ), mtInternal); 2668 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2669 } 2670 2671 void os::signal_init_pd() { 2672 int ret; 2673 2674 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2675 assert(ret == 0, "sema_init() failed"); 2676 } 2677 2678 void os::signal_notify(int signal_number) { 2679 int ret; 2680 2681 Atomic::inc(&pending_signals[signal_number]); 2682 ret = ::sema_post(&sig_sem); 2683 assert(ret == 0, "sema_post() failed"); 2684 } 2685 2686 static int check_pending_signals(bool wait_for_signal) { 2687 int ret; 2688 while (true) { 2689 for (int i = 0; i < Sigexit + 1; i++) { 2690 jint n = pending_signals[i]; 2691 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2692 return i; 2693 } 2694 } 2695 if (!wait_for_signal) { 2696 return -1; 2697 } 2698 JavaThread *thread = JavaThread::current(); 2699 ThreadBlockInVM tbivm(thread); 2700 2701 bool threadIsSuspended; 2702 do { 2703 thread->set_suspend_equivalent(); 2704 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2705 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2706 ; 2707 assert(ret == 0, "sema_wait() failed"); 2708 2709 // were we externally suspended while we were waiting? 2710 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2711 if (threadIsSuspended) { 2712 // 2713 // The semaphore has been incremented, but while we were waiting 2714 // another thread suspended us. We don't want to continue running 2715 // while suspended because that would surprise the thread that 2716 // suspended us. 2717 // 2718 ret = ::sema_post(&sig_sem); 2719 assert(ret == 0, "sema_post() failed"); 2720 2721 thread->java_suspend_self(); 2722 } 2723 } while (threadIsSuspended); 2724 } 2725 } 2726 2727 int os::signal_lookup() { 2728 return check_pending_signals(false); 2729 } 2730 2731 int os::signal_wait() { 2732 return check_pending_signals(true); 2733 } 2734 2735 //////////////////////////////////////////////////////////////////////////////// 2736 // Virtual Memory 2737 2738 static int page_size = -1; 2739 2740 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2741 // clear this var if support is not available. 2742 static bool has_map_align = true; 2743 2744 int os::vm_page_size() { 2745 assert(page_size != -1, "must call os::init"); 2746 return page_size; 2747 } 2748 2749 // Solaris allocates memory by pages. 2750 int os::vm_allocation_granularity() { 2751 assert(page_size != -1, "must call os::init"); 2752 return page_size; 2753 } 2754 2755 bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2756 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2757 size_t size = bytes; 2758 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2759 if (res != NULL) { 2760 if (UseNUMAInterleaving) { 2761 numa_make_global(addr, bytes); 2762 } 2763 return true; 2764 } 2765 return false; 2766 } 2767 2768 bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2769 bool exec) { 2770 if (commit_memory(addr, bytes, exec)) { 2771 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2772 // If the large page size has been set and the VM 2773 // is using large pages, use the large page size 2774 // if it is smaller than the alignment hint. This is 2775 // a case where the VM wants to use a larger alignment size 2776 // for its own reasons but still want to use large pages 2777 // (which is what matters to setting the mpss range. 2778 size_t page_size = 0; 2779 if (large_page_size() < alignment_hint) { 2780 assert(UseLargePages, "Expected to be here for large page use only"); 2781 page_size = large_page_size(); 2782 } else { 2783 // If the alignment hint is less than the large page 2784 // size, the VM wants a particular alignment (thus the hint) 2785 // for internal reasons. Try to set the mpss range using 2786 // the alignment_hint. 2787 page_size = alignment_hint; 2788 } 2789 // Since this is a hint, ignore any failures. 2790 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2791 } 2792 return true; 2793 } 2794 return false; 2795 } 2796 2797 // Uncommit the pages in a specified region. 2798 void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2799 if (madvise(addr, bytes, MADV_FREE) < 0) { 2800 debug_only(warning("MADV_FREE failed.")); 2801 return; 2802 } 2803 } 2804 2805 bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2806 return os::commit_memory(addr, size); 2807 } 2808 2809 bool os::remove_stack_guard_pages(char* addr, size_t size) { 2810 return os::uncommit_memory(addr, size); 2811 } 2812 2813 // Change the page size in a given range. 2814 void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2815 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2816 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2817 if (UseLargePages && UseMPSS) { 2818 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2819 } 2820 } 2821 2822 // Tell the OS to make the range local to the first-touching LWP 2823 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2824 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2825 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2826 debug_only(warning("MADV_ACCESS_LWP failed.")); 2827 } 2828 } 2829 2830 // Tell the OS that this range would be accessed from different LWPs. 2831 void os::numa_make_global(char *addr, size_t bytes) { 2832 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2833 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2834 debug_only(warning("MADV_ACCESS_MANY failed.")); 2835 } 2836 } 2837 2838 // Get the number of the locality groups. 2839 size_t os::numa_get_groups_num() { 2840 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2841 return n != -1 ? n : 1; 2842 } 2843 2844 // Get a list of leaf locality groups. A leaf lgroup is group that 2845 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2846 // board. An LWP is assigned to one of these groups upon creation. 2847 size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2848 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2849 ids[0] = 0; 2850 return 1; 2851 } 2852 int result_size = 0, top = 1, bottom = 0, cur = 0; 2853 for (int k = 0; k < size; k++) { 2854 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2855 (Solaris::lgrp_id_t*)&ids[top], size - top); 2856 if (r == -1) { 2857 ids[0] = 0; 2858 return 1; 2859 } 2860 if (!r) { 2861 // That's a leaf node. 2862 assert (bottom <= cur, "Sanity check"); 2863 // Check if the node has memory 2864 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2865 NULL, 0, LGRP_RSRC_MEM) > 0) { 2866 ids[bottom++] = ids[cur]; 2867 } 2868 } 2869 top += r; 2870 cur++; 2871 } 2872 if (bottom == 0) { 2873 // Handle a situation, when the OS reports no memory available. 2874 // Assume UMA architecture. 2875 ids[0] = 0; 2876 return 1; 2877 } 2878 return bottom; 2879 } 2880 2881 // Detect the topology change. Typically happens during CPU plugging-unplugging. 2882 bool os::numa_topology_changed() { 2883 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2884 if (is_stale != -1 && is_stale) { 2885 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2886 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2887 assert(c != 0, "Failure to initialize LGRP API"); 2888 Solaris::set_lgrp_cookie(c); 2889 return true; 2890 } 2891 return false; 2892 } 2893 2894 // Get the group id of the current LWP. 2895 int os::numa_get_group_id() { 2896 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2897 if (lgrp_id == -1) { 2898 return 0; 2899 } 2900 const int size = os::numa_get_groups_num(); 2901 int *ids = (int*)alloca(size * sizeof(int)); 2902 2903 // Get the ids of all lgroups with memory; r is the count. 2904 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2905 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2906 if (r <= 0) { 2907 return 0; 2908 } 2909 return ids[os::random() % r]; 2910 } 2911 2912 // Request information about the page. 2913 bool os::get_page_info(char *start, page_info* info) { 2914 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2915 uint64_t addr = (uintptr_t)start; 2916 uint64_t outdata[2]; 2917 uint_t validity = 0; 2918 2919 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2920 return false; 2921 } 2922 2923 info->size = 0; 2924 info->lgrp_id = -1; 2925 2926 if ((validity & 1) != 0) { 2927 if ((validity & 2) != 0) { 2928 info->lgrp_id = outdata[0]; 2929 } 2930 if ((validity & 4) != 0) { 2931 info->size = outdata[1]; 2932 } 2933 return true; 2934 } 2935 return false; 2936 } 2937 2938 // Scan the pages from start to end until a page different than 2939 // the one described in the info parameter is encountered. 2940 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2941 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2942 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2943 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2944 uint_t validity[MAX_MEMINFO_CNT]; 2945 2946 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2947 uint64_t p = (uint64_t)start; 2948 while (p < (uint64_t)end) { 2949 addrs[0] = p; 2950 size_t addrs_count = 1; 2951 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2952 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2953 addrs_count++; 2954 } 2955 2956 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2957 return NULL; 2958 } 2959 2960 size_t i = 0; 2961 for (; i < addrs_count; i++) { 2962 if ((validity[i] & 1) != 0) { 2963 if ((validity[i] & 4) != 0) { 2964 if (outdata[types * i + 1] != page_expected->size) { 2965 break; 2966 } 2967 } else 2968 if (page_expected->size != 0) { 2969 break; 2970 } 2971 2972 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2973 if (outdata[types * i] != page_expected->lgrp_id) { 2974 break; 2975 } 2976 } 2977 } else { 2978 return NULL; 2979 } 2980 } 2981 2982 if (i != addrs_count) { 2983 if ((validity[i] & 2) != 0) { 2984 page_found->lgrp_id = outdata[types * i]; 2985 } else { 2986 page_found->lgrp_id = -1; 2987 } 2988 if ((validity[i] & 4) != 0) { 2989 page_found->size = outdata[types * i + 1]; 2990 } else { 2991 page_found->size = 0; 2992 } 2993 return (char*)addrs[i]; 2994 } 2995 2996 p = addrs[addrs_count - 1] + page_size; 2997 } 2998 return end; 2999 } 3000 3001 bool os::pd_uncommit_memory(char* addr, size_t bytes) { 3002 size_t size = bytes; 3003 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3004 // uncommitted page. Otherwise, the read/write might succeed if we 3005 // have enough swap space to back the physical page. 3006 return 3007 NULL != Solaris::mmap_chunk(addr, size, 3008 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3009 PROT_NONE); 3010 } 3011 3012 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3013 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3014 3015 if (b == MAP_FAILED) { 3016 return NULL; 3017 } 3018 return b; 3019 } 3020 3021 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3022 char* addr = requested_addr; 3023 int flags = MAP_PRIVATE | MAP_NORESERVE; 3024 3025 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3026 3027 if (fixed) { 3028 flags |= MAP_FIXED; 3029 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3030 flags |= MAP_ALIGN; 3031 addr = (char*) alignment_hint; 3032 } 3033 3034 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3035 // uncommitted page. Otherwise, the read/write might succeed if we 3036 // have enough swap space to back the physical page. 3037 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3038 } 3039 3040 char* os::pd_reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3041 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3042 3043 guarantee(requested_addr == NULL || requested_addr == addr, 3044 "OS failed to return requested mmap address."); 3045 return addr; 3046 } 3047 3048 // Reserve memory at an arbitrary address, only if that area is 3049 // available (and not reserved for something else). 3050 3051 char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3052 const int max_tries = 10; 3053 char* base[max_tries]; 3054 size_t size[max_tries]; 3055 3056 // Solaris adds a gap between mmap'ed regions. The size of the gap 3057 // is dependent on the requested size and the MMU. Our initial gap 3058 // value here is just a guess and will be corrected later. 3059 bool had_top_overlap = false; 3060 bool have_adjusted_gap = false; 3061 size_t gap = 0x400000; 3062 3063 // Assert only that the size is a multiple of the page size, since 3064 // that's all that mmap requires, and since that's all we really know 3065 // about at this low abstraction level. If we need higher alignment, 3066 // we can either pass an alignment to this method or verify alignment 3067 // in one of the methods further up the call chain. See bug 5044738. 3068 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3069 3070 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3071 // Give it a try, if the kernel honors the hint we can return immediately. 3072 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3073 3074 volatile int err = errno; 3075 if (addr == requested_addr) { 3076 return addr; 3077 } else if (addr != NULL) { 3078 pd_unmap_memory(addr, bytes); 3079 } 3080 3081 if (PrintMiscellaneous && Verbose) { 3082 char buf[256]; 3083 buf[0] = '\0'; 3084 if (addr == NULL) { 3085 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3086 } 3087 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3088 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3089 "%s", bytes, requested_addr, addr, buf); 3090 } 3091 3092 // Address hint method didn't work. Fall back to the old method. 3093 // In theory, once SNV becomes our oldest supported platform, this 3094 // code will no longer be needed. 3095 // 3096 // Repeatedly allocate blocks until the block is allocated at the 3097 // right spot. Give up after max_tries. 3098 int i; 3099 for (i = 0; i < max_tries; ++i) { 3100 base[i] = reserve_memory(bytes); 3101 3102 if (base[i] != NULL) { 3103 // Is this the block we wanted? 3104 if (base[i] == requested_addr) { 3105 size[i] = bytes; 3106 break; 3107 } 3108 3109 // check that the gap value is right 3110 if (had_top_overlap && !have_adjusted_gap) { 3111 size_t actual_gap = base[i-1] - base[i] - bytes; 3112 if (gap != actual_gap) { 3113 // adjust the gap value and retry the last 2 allocations 3114 assert(i > 0, "gap adjustment code problem"); 3115 have_adjusted_gap = true; // adjust the gap only once, just in case 3116 gap = actual_gap; 3117 if (PrintMiscellaneous && Verbose) { 3118 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3119 } 3120 unmap_memory(base[i], bytes); 3121 unmap_memory(base[i-1], size[i-1]); 3122 i-=2; 3123 continue; 3124 } 3125 } 3126 3127 // Does this overlap the block we wanted? Give back the overlapped 3128 // parts and try again. 3129 // 3130 // There is still a bug in this code: if top_overlap == bytes, 3131 // the overlap is offset from requested region by the value of gap. 3132 // In this case giving back the overlapped part will not work, 3133 // because we'll give back the entire block at base[i] and 3134 // therefore the subsequent allocation will not generate a new gap. 3135 // This could be fixed with a new algorithm that used larger 3136 // or variable size chunks to find the requested region - 3137 // but such a change would introduce additional complications. 3138 // It's rare enough that the planets align for this bug, 3139 // so we'll just wait for a fix for 6204603/5003415 which 3140 // will provide a mmap flag to allow us to avoid this business. 3141 3142 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3143 if (top_overlap >= 0 && top_overlap < bytes) { 3144 had_top_overlap = true; 3145 unmap_memory(base[i], top_overlap); 3146 base[i] += top_overlap; 3147 size[i] = bytes - top_overlap; 3148 } else { 3149 size_t bottom_overlap = base[i] + bytes - requested_addr; 3150 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3151 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3152 warning("attempt_reserve_memory_at: possible alignment bug"); 3153 } 3154 unmap_memory(requested_addr, bottom_overlap); 3155 size[i] = bytes - bottom_overlap; 3156 } else { 3157 size[i] = bytes; 3158 } 3159 } 3160 } 3161 } 3162 3163 // Give back the unused reserved pieces. 3164 3165 for (int j = 0; j < i; ++j) { 3166 if (base[j] != NULL) { 3167 unmap_memory(base[j], size[j]); 3168 } 3169 } 3170 3171 return (i < max_tries) ? requested_addr : NULL; 3172 } 3173 3174 bool os::pd_release_memory(char* addr, size_t bytes) { 3175 size_t size = bytes; 3176 return munmap(addr, size) == 0; 3177 } 3178 3179 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3180 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3181 "addr must be page aligned"); 3182 int retVal = mprotect(addr, bytes, prot); 3183 return retVal == 0; 3184 } 3185 3186 // Protect memory (Used to pass readonly pages through 3187 // JNI GetArray<type>Elements with empty arrays.) 3188 // Also, used for serialization page and for compressed oops null pointer 3189 // checking. 3190 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3191 bool is_committed) { 3192 unsigned int p = 0; 3193 switch (prot) { 3194 case MEM_PROT_NONE: p = PROT_NONE; break; 3195 case MEM_PROT_READ: p = PROT_READ; break; 3196 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3197 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3198 default: 3199 ShouldNotReachHere(); 3200 } 3201 // is_committed is unused. 3202 return solaris_mprotect(addr, bytes, p); 3203 } 3204 3205 // guard_memory and unguard_memory only happens within stack guard pages. 3206 // Since ISM pertains only to the heap, guard and unguard memory should not 3207 /// happen with an ISM region. 3208 bool os::guard_memory(char* addr, size_t bytes) { 3209 return solaris_mprotect(addr, bytes, PROT_NONE); 3210 } 3211 3212 bool os::unguard_memory(char* addr, size_t bytes) { 3213 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3214 } 3215 3216 // Large page support 3217 3218 // UseLargePages is the master flag to enable/disable large page memory. 3219 // UseMPSS and UseISM are supported for compatibility reasons. Their combined 3220 // effects can be described in the following table: 3221 // 3222 // UseLargePages UseMPSS UseISM 3223 // false * * => UseLargePages is the master switch, turning 3224 // it off will turn off both UseMPSS and 3225 // UseISM. VM will not use large page memory 3226 // regardless the settings of UseMPSS/UseISM. 3227 // true false false => Unless future Solaris provides other 3228 // mechanism to use large page memory, this 3229 // combination is equivalent to -UseLargePages, 3230 // VM will not use large page memory 3231 // true true false => JVM will use MPSS for large page memory. 3232 // This is the default behavior. 3233 // true false true => JVM will use ISM for large page memory. 3234 // true true true => JVM will use ISM if it is available. 3235 // Otherwise, JVM will fall back to MPSS. 3236 // Becaues ISM is now available on all 3237 // supported Solaris versions, this combination 3238 // is equivalent to +UseISM -UseMPSS. 3239 3240 static size_t _large_page_size = 0; 3241 3242 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3243 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3244 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3245 // can support multiple page sizes. 3246 3247 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3248 // ISM is only recommended on old Solaris where there is no MPSS support. 3249 // Simply choose a conservative value as default. 3250 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3251 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3252 ARM_ONLY(2 * M); 3253 3254 // ISM is available on all supported Solaris versions 3255 return true; 3256 } 3257 3258 // Insertion sort for small arrays (descending order). 3259 static void insertion_sort_descending(size_t* array, int len) { 3260 for (int i = 0; i < len; i++) { 3261 size_t val = array[i]; 3262 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3263 size_t tmp = array[key]; 3264 array[key] = array[key - 1]; 3265 array[key - 1] = tmp; 3266 } 3267 } 3268 } 3269 3270 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3271 const unsigned int usable_count = VM_Version::page_size_count(); 3272 if (usable_count == 1) { 3273 return false; 3274 } 3275 3276 // Find the right getpagesizes interface. When solaris 11 is the minimum 3277 // build platform, getpagesizes() (without the '2') can be called directly. 3278 typedef int (*gps_t)(size_t[], int); 3279 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3280 if (gps_func == NULL) { 3281 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3282 if (gps_func == NULL) { 3283 if (warn) { 3284 warning("MPSS is not supported by the operating system."); 3285 } 3286 return false; 3287 } 3288 } 3289 3290 // Fill the array of page sizes. 3291 int n = (*gps_func)(_page_sizes, page_sizes_max); 3292 assert(n > 0, "Solaris bug?"); 3293 3294 if (n == page_sizes_max) { 3295 // Add a sentinel value (necessary only if the array was completely filled 3296 // since it is static (zeroed at initialization)). 3297 _page_sizes[--n] = 0; 3298 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3299 } 3300 assert(_page_sizes[n] == 0, "missing sentinel"); 3301 trace_page_sizes("available page sizes", _page_sizes, n); 3302 3303 if (n == 1) return false; // Only one page size available. 3304 3305 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3306 // select up to usable_count elements. First sort the array, find the first 3307 // acceptable value, then copy the usable sizes to the top of the array and 3308 // trim the rest. Make sure to include the default page size :-). 3309 // 3310 // A better policy could get rid of the 4M limit by taking the sizes of the 3311 // important VM memory regions (java heap and possibly the code cache) into 3312 // account. 3313 insertion_sort_descending(_page_sizes, n); 3314 const size_t size_limit = 3315 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3316 int beg; 3317 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3318 const int end = MIN2((int)usable_count, n) - 1; 3319 for (int cur = 0; cur < end; ++cur, ++beg) { 3320 _page_sizes[cur] = _page_sizes[beg]; 3321 } 3322 _page_sizes[end] = vm_page_size(); 3323 _page_sizes[end + 1] = 0; 3324 3325 if (_page_sizes[end] > _page_sizes[end - 1]) { 3326 // Default page size is not the smallest; sort again. 3327 insertion_sort_descending(_page_sizes, end + 1); 3328 } 3329 *page_size = _page_sizes[0]; 3330 3331 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3332 return true; 3333 } 3334 3335 void os::large_page_init() { 3336 if (!UseLargePages) { 3337 UseISM = false; 3338 UseMPSS = false; 3339 return; 3340 } 3341 3342 // print a warning if any large page related flag is specified on command line 3343 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3344 !FLAG_IS_DEFAULT(UseISM) || 3345 !FLAG_IS_DEFAULT(UseMPSS) || 3346 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3347 UseISM = UseISM && 3348 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3349 if (UseISM) { 3350 // ISM disables MPSS to be compatible with old JDK behavior 3351 UseMPSS = false; 3352 _page_sizes[0] = _large_page_size; 3353 _page_sizes[1] = vm_page_size(); 3354 } 3355 3356 UseMPSS = UseMPSS && 3357 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3358 3359 UseLargePages = UseISM || UseMPSS; 3360 } 3361 3362 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3363 // Signal to OS that we want large pages for addresses 3364 // from addr, addr + bytes 3365 struct memcntl_mha mpss_struct; 3366 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3367 mpss_struct.mha_pagesize = align; 3368 mpss_struct.mha_flags = 0; 3369 if (memcntl(start, bytes, MC_HAT_ADVISE, 3370 (caddr_t) &mpss_struct, 0, 0) < 0) { 3371 debug_only(warning("Attempt to use MPSS failed.")); 3372 return false; 3373 } 3374 return true; 3375 } 3376 3377 char* os::reserve_memory_special(size_t size, char* addr, bool exec) { 3378 // "exec" is passed in but not used. Creating the shared image for 3379 // the code cache doesn't have an SHM_X executable permission to check. 3380 assert(UseLargePages && UseISM, "only for ISM large pages"); 3381 3382 char* retAddr = NULL; 3383 int shmid; 3384 key_t ismKey; 3385 3386 bool warn_on_failure = UseISM && 3387 (!FLAG_IS_DEFAULT(UseLargePages) || 3388 !FLAG_IS_DEFAULT(UseISM) || 3389 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3390 ); 3391 char msg[128]; 3392 3393 ismKey = IPC_PRIVATE; 3394 3395 // Create a large shared memory region to attach to based on size. 3396 // Currently, size is the total size of the heap 3397 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3398 if (shmid == -1){ 3399 if (warn_on_failure) { 3400 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3401 warning(msg); 3402 } 3403 return NULL; 3404 } 3405 3406 // Attach to the region 3407 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3408 int err = errno; 3409 3410 // Remove shmid. If shmat() is successful, the actual shared memory segment 3411 // will be deleted when it's detached by shmdt() or when the process 3412 // terminates. If shmat() is not successful this will remove the shared 3413 // segment immediately. 3414 shmctl(shmid, IPC_RMID, NULL); 3415 3416 if (retAddr == (char *) -1) { 3417 if (warn_on_failure) { 3418 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3419 warning(msg); 3420 } 3421 return NULL; 3422 } 3423 if ((retAddr != NULL) && UseNUMAInterleaving) { 3424 numa_make_global(retAddr, size); 3425 } 3426 return retAddr; 3427 } 3428 3429 bool os::release_memory_special(char* base, size_t bytes) { 3430 // detaching the SHM segment will also delete it, see reserve_memory_special() 3431 int rslt = shmdt(base); 3432 return rslt == 0; 3433 } 3434 3435 size_t os::large_page_size() { 3436 return _large_page_size; 3437 } 3438 3439 // MPSS allows application to commit large page memory on demand; with ISM 3440 // the entire memory region must be allocated as shared memory. 3441 bool os::can_commit_large_page_memory() { 3442 return UseISM ? false : true; 3443 } 3444 3445 bool os::can_execute_large_page_memory() { 3446 return UseISM ? false : true; 3447 } 3448 3449 static int os_sleep(jlong millis, bool interruptible) { 3450 const jlong limit = INT_MAX; 3451 jlong prevtime; 3452 int res; 3453 3454 while (millis > limit) { 3455 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3456 return res; 3457 millis -= limit; 3458 } 3459 3460 // Restart interrupted polls with new parameters until the proper delay 3461 // has been completed. 3462 3463 prevtime = getTimeMillis(); 3464 3465 while (millis > 0) { 3466 jlong newtime; 3467 3468 if (!interruptible) { 3469 // Following assert fails for os::yield_all: 3470 // assert(!thread->is_Java_thread(), "must not be java thread"); 3471 res = poll(NULL, 0, millis); 3472 } else { 3473 JavaThread *jt = JavaThread::current(); 3474 3475 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3476 os::Solaris::clear_interrupted); 3477 } 3478 3479 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3480 // thread.Interrupt. 3481 3482 // See c/r 6751923. Poll can return 0 before time 3483 // has elapsed if time is set via clock_settime (as NTP does). 3484 // res == 0 if poll timed out (see man poll RETURN VALUES) 3485 // using the logic below checks that we really did 3486 // sleep at least "millis" if not we'll sleep again. 3487 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3488 newtime = getTimeMillis(); 3489 assert(newtime >= prevtime, "time moving backwards"); 3490 /* Doing prevtime and newtime in microseconds doesn't help precision, 3491 and trying to round up to avoid lost milliseconds can result in a 3492 too-short delay. */ 3493 millis -= newtime - prevtime; 3494 if(millis <= 0) 3495 return OS_OK; 3496 prevtime = newtime; 3497 } else 3498 return res; 3499 } 3500 3501 return OS_OK; 3502 } 3503 3504 // Read calls from inside the vm need to perform state transitions 3505 size_t os::read(int fd, void *buf, unsigned int nBytes) { 3506 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3507 } 3508 3509 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3510 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3511 } 3512 3513 int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3514 assert(thread == Thread::current(), "thread consistency check"); 3515 3516 // TODO-FIXME: this should be removed. 3517 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3518 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3519 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3520 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3521 // is fooled into believing that the system is making progress. In the code below we block the 3522 // the watcher thread while safepoint is in progress so that it would not appear as though the 3523 // system is making progress. 3524 if (!Solaris::T2_libthread() && 3525 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3526 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3527 // the entire safepoint, the watcher thread will line up here during the safepoint. 3528 Threads_lock->lock_without_safepoint_check(); 3529 Threads_lock->unlock(); 3530 } 3531 3532 if (thread->is_Java_thread()) { 3533 // This is a JavaThread so we honor the _thread_blocked protocol 3534 // even for sleeps of 0 milliseconds. This was originally done 3535 // as a workaround for bug 4338139. However, now we also do it 3536 // to honor the suspend-equivalent protocol. 3537 3538 JavaThread *jt = (JavaThread *) thread; 3539 ThreadBlockInVM tbivm(jt); 3540 3541 jt->set_suspend_equivalent(); 3542 // cleared by handle_special_suspend_equivalent_condition() or 3543 // java_suspend_self() via check_and_wait_while_suspended() 3544 3545 int ret_code; 3546 if (millis <= 0) { 3547 thr_yield(); 3548 ret_code = 0; 3549 } else { 3550 // The original sleep() implementation did not create an 3551 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3552 // I'm preserving that decision for now. 3553 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3554 3555 ret_code = os_sleep(millis, interruptible); 3556 } 3557 3558 // were we externally suspended while we were waiting? 3559 jt->check_and_wait_while_suspended(); 3560 3561 return ret_code; 3562 } 3563 3564 // non-JavaThread from this point on: 3565 3566 if (millis <= 0) { 3567 thr_yield(); 3568 return 0; 3569 } 3570 3571 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3572 3573 return os_sleep(millis, interruptible); 3574 } 3575 3576 int os::naked_sleep() { 3577 // %% make the sleep time an integer flag. for now use 1 millisec. 3578 return os_sleep(1, false); 3579 } 3580 3581 // Sleep forever; naked call to OS-specific sleep; use with CAUTION 3582 void os::infinite_sleep() { 3583 while (true) { // sleep forever ... 3584 ::sleep(100); // ... 100 seconds at a time 3585 } 3586 } 3587 3588 // Used to convert frequent JVM_Yield() to nops 3589 bool os::dont_yield() { 3590 if (DontYieldALot) { 3591 static hrtime_t last_time = 0; 3592 hrtime_t diff = getTimeNanos() - last_time; 3593 3594 if (diff < DontYieldALotInterval * 1000000) 3595 return true; 3596 3597 last_time += diff; 3598 3599 return false; 3600 } 3601 else { 3602 return false; 3603 } 3604 } 3605 3606 // Caveat: Solaris os::yield() causes a thread-state transition whereas 3607 // the linux and win32 implementations do not. This should be checked. 3608 3609 void os::yield() { 3610 // Yields to all threads with same or greater priority 3611 os::sleep(Thread::current(), 0, false); 3612 } 3613 3614 // Note that yield semantics are defined by the scheduling class to which 3615 // the thread currently belongs. Typically, yield will _not yield to 3616 // other equal or higher priority threads that reside on the dispatch queues 3617 // of other CPUs. 3618 3619 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3620 3621 3622 // On Solaris we found that yield_all doesn't always yield to all other threads. 3623 // There have been cases where there is a thread ready to execute but it doesn't 3624 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3625 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3626 // SIGWAITING signal which will cause a new lwp to be created. So we count the 3627 // number of times yield_all is called in the one loop and increase the sleep 3628 // time after 8 attempts. If this fails too we increase the concurrency level 3629 // so that the starving thread would get an lwp 3630 3631 void os::yield_all(int attempts) { 3632 // Yields to all threads, including threads with lower priorities 3633 if (attempts == 0) { 3634 os::sleep(Thread::current(), 1, false); 3635 } else { 3636 int iterations = attempts % 30; 3637 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3638 // thr_setconcurrency and _getconcurrency make sense only under T1. 3639 int noofLWPS = thr_getconcurrency(); 3640 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3641 thr_setconcurrency(thr_getconcurrency() + 1); 3642 } 3643 } else if (iterations < 25) { 3644 os::sleep(Thread::current(), 1, false); 3645 } else { 3646 os::sleep(Thread::current(), 10, false); 3647 } 3648 } 3649 } 3650 3651 // Called from the tight loops to possibly influence time-sharing heuristics 3652 void os::loop_breaker(int attempts) { 3653 os::yield_all(attempts); 3654 } 3655 3656 3657 // Interface for setting lwp priorities. If we are using T2 libthread, 3658 // which forces the use of BoundThreads or we manually set UseBoundThreads, 3659 // all of our threads will be assigned to real lwp's. Using the thr_setprio 3660 // function is meaningless in this mode so we must adjust the real lwp's priority 3661 // The routines below implement the getting and setting of lwp priorities. 3662 // 3663 // Note: There are three priority scales used on Solaris. Java priotities 3664 // which range from 1 to 10, libthread "thr_setprio" scale which range 3665 // from 0 to 127, and the current scheduling class of the process we 3666 // are running in. This is typically from -60 to +60. 3667 // The setting of the lwp priorities in done after a call to thr_setprio 3668 // so Java priorities are mapped to libthread priorities and we map from 3669 // the latter to lwp priorities. We don't keep priorities stored in 3670 // Java priorities since some of our worker threads want to set priorities 3671 // higher than all Java threads. 3672 // 3673 // For related information: 3674 // (1) man -s 2 priocntl 3675 // (2) man -s 4 priocntl 3676 // (3) man dispadmin 3677 // = librt.so 3678 // = libthread/common/rtsched.c - thrp_setlwpprio(). 3679 // = ps -cL <pid> ... to validate priority. 3680 // = sched_get_priority_min and _max 3681 // pthread_create 3682 // sched_setparam 3683 // pthread_setschedparam 3684 // 3685 // Assumptions: 3686 // + We assume that all threads in the process belong to the same 3687 // scheduling class. IE. an homogenous process. 3688 // + Must be root or in IA group to change change "interactive" attribute. 3689 // Priocntl() will fail silently. The only indication of failure is when 3690 // we read-back the value and notice that it hasn't changed. 3691 // + Interactive threads enter the runq at the head, non-interactive at the tail. 3692 // + For RT, change timeslice as well. Invariant: 3693 // constant "priority integral" 3694 // Konst == TimeSlice * (60-Priority) 3695 // Given a priority, compute appropriate timeslice. 3696 // + Higher numerical values have higher priority. 3697 3698 // sched class attributes 3699 typedef struct { 3700 int schedPolicy; // classID 3701 int maxPrio; 3702 int minPrio; 3703 } SchedInfo; 3704 3705 3706 static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3707 3708 #ifdef ASSERT 3709 static int ReadBackValidate = 1; 3710 #endif 3711 static int myClass = 0; 3712 static int myMin = 0; 3713 static int myMax = 0; 3714 static int myCur = 0; 3715 static bool priocntl_enable = false; 3716 3717 static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3718 static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3719 3720 // Call the version of priocntl suitable for all supported versions 3721 // of Solaris. We need to call through this wrapper so that we can 3722 // build on Solaris 9 and run on Solaris 8, 9 and 10. 3723 // 3724 // This code should be removed if we ever stop supporting Solaris 8 3725 // and earlier releases. 3726 3727 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3728 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3729 static priocntl_type priocntl_ptr = priocntl_stub; 3730 3731 // Stub to set the value of the real pointer, and then call the real 3732 // function. 3733 3734 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3735 // Try Solaris 8- name only. 3736 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3737 guarantee(tmp != NULL, "priocntl function not found."); 3738 priocntl_ptr = tmp; 3739 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3740 } 3741 3742 3743 // lwp_priocntl_init 3744 // 3745 // Try to determine the priority scale for our process. 3746 // 3747 // Return errno or 0 if OK. 3748 // 3749 static 3750 int lwp_priocntl_init () 3751 { 3752 int rslt; 3753 pcinfo_t ClassInfo; 3754 pcparms_t ParmInfo; 3755 int i; 3756 3757 if (!UseThreadPriorities) return 0; 3758 3759 // We are using Bound threads, we need to determine our priority ranges 3760 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3761 // If ThreadPriorityPolicy is 1, switch tables 3762 if (ThreadPriorityPolicy == 1) { 3763 for (i = 0 ; i < CriticalPriority+1; i++) 3764 os::java_to_os_priority[i] = prio_policy1[i]; 3765 } 3766 if (UseCriticalJavaThreadPriority) { 3767 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3768 // See set_native_priority() and set_lwp_class_and_priority(). 3769 // Save original MaxPriority mapping in case attempt to 3770 // use critical priority fails. 3771 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3772 // Set negative to distinguish from other priorities 3773 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3774 } 3775 } 3776 // Not using Bound Threads, set to ThreadPolicy 1 3777 else { 3778 for ( i = 0 ; i < CriticalPriority+1; i++ ) { 3779 os::java_to_os_priority[i] = prio_policy1[i]; 3780 } 3781 return 0; 3782 } 3783 3784 // Get IDs for a set of well-known scheduling classes. 3785 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3786 // the system. We should have a loop that iterates over the 3787 // classID values, which are known to be "small" integers. 3788 3789 strcpy(ClassInfo.pc_clname, "TS"); 3790 ClassInfo.pc_cid = -1; 3791 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3792 if (rslt < 0) return errno; 3793 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3794 tsLimits.schedPolicy = ClassInfo.pc_cid; 3795 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3796 tsLimits.minPrio = -tsLimits.maxPrio; 3797 3798 strcpy(ClassInfo.pc_clname, "IA"); 3799 ClassInfo.pc_cid = -1; 3800 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3801 if (rslt < 0) return errno; 3802 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3803 iaLimits.schedPolicy = ClassInfo.pc_cid; 3804 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3805 iaLimits.minPrio = -iaLimits.maxPrio; 3806 3807 strcpy(ClassInfo.pc_clname, "RT"); 3808 ClassInfo.pc_cid = -1; 3809 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3810 if (rslt < 0) return errno; 3811 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3812 rtLimits.schedPolicy = ClassInfo.pc_cid; 3813 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3814 rtLimits.minPrio = 0; 3815 3816 strcpy(ClassInfo.pc_clname, "FX"); 3817 ClassInfo.pc_cid = -1; 3818 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3819 if (rslt < 0) return errno; 3820 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3821 fxLimits.schedPolicy = ClassInfo.pc_cid; 3822 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3823 fxLimits.minPrio = 0; 3824 3825 // Query our "current" scheduling class. 3826 // This will normally be IA, TS or, rarely, FX or RT. 3827 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3828 ParmInfo.pc_cid = PC_CLNULL; 3829 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3830 if (rslt < 0) return errno; 3831 myClass = ParmInfo.pc_cid; 3832 3833 // We now know our scheduling classId, get specific information 3834 // about the class. 3835 ClassInfo.pc_cid = myClass; 3836 ClassInfo.pc_clname[0] = 0; 3837 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3838 if (rslt < 0) return errno; 3839 3840 if (ThreadPriorityVerbose) { 3841 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3842 } 3843 3844 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3845 ParmInfo.pc_cid = PC_CLNULL; 3846 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3847 if (rslt < 0) return errno; 3848 3849 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3850 myMin = rtLimits.minPrio; 3851 myMax = rtLimits.maxPrio; 3852 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3853 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3854 myMin = iaLimits.minPrio; 3855 myMax = iaLimits.maxPrio; 3856 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3857 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3858 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3859 myMin = tsLimits.minPrio; 3860 myMax = tsLimits.maxPrio; 3861 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3862 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3863 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3864 myMin = fxLimits.minPrio; 3865 myMax = fxLimits.maxPrio; 3866 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3867 } else { 3868 // No clue - punt 3869 if (ThreadPriorityVerbose) 3870 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3871 return EINVAL; // no clue, punt 3872 } 3873 3874 if (ThreadPriorityVerbose) { 3875 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3876 } 3877 3878 priocntl_enable = true; // Enable changing priorities 3879 return 0; 3880 } 3881 3882 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3883 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3884 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3885 #define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3886 3887 3888 // scale_to_lwp_priority 3889 // 3890 // Convert from the libthread "thr_setprio" scale to our current 3891 // lwp scheduling class scale. 3892 // 3893 static 3894 int scale_to_lwp_priority (int rMin, int rMax, int x) 3895 { 3896 int v; 3897 3898 if (x == 127) return rMax; // avoid round-down 3899 v = (((x*(rMax-rMin)))/128)+rMin; 3900 return v; 3901 } 3902 3903 3904 // set_lwp_class_and_priority 3905 // 3906 // Set the class and priority of the lwp. This call should only 3907 // be made when using bound threads (T2 threads are bound by default). 3908 // 3909 int set_lwp_class_and_priority(int ThreadID, int lwpid, 3910 int newPrio, int new_class, bool scale) { 3911 int rslt; 3912 int Actual, Expected, prv; 3913 pcparms_t ParmInfo; // for GET-SET 3914 #ifdef ASSERT 3915 pcparms_t ReadBack; // for readback 3916 #endif 3917 3918 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3919 // Query current values. 3920 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3921 // Cache "pcparms_t" in global ParmCache. 3922 // TODO: elide set-to-same-value 3923 3924 // If something went wrong on init, don't change priorities. 3925 if ( !priocntl_enable ) { 3926 if (ThreadPriorityVerbose) 3927 tty->print_cr("Trying to set priority but init failed, ignoring"); 3928 return EINVAL; 3929 } 3930 3931 // If lwp hasn't started yet, just return 3932 // the _start routine will call us again. 3933 if ( lwpid <= 0 ) { 3934 if (ThreadPriorityVerbose) { 3935 tty->print_cr ("deferring the set_lwp_class_and_priority of thread " 3936 INTPTR_FORMAT " to %d, lwpid not set", 3937 ThreadID, newPrio); 3938 } 3939 return 0; 3940 } 3941 3942 if (ThreadPriorityVerbose) { 3943 tty->print_cr ("set_lwp_class_and_priority(" 3944 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3945 ThreadID, lwpid, newPrio); 3946 } 3947 3948 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3949 ParmInfo.pc_cid = PC_CLNULL; 3950 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3951 if (rslt < 0) return errno; 3952 3953 int cur_class = ParmInfo.pc_cid; 3954 ParmInfo.pc_cid = (id_t)new_class; 3955 3956 if (new_class == rtLimits.schedPolicy) { 3957 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3958 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3959 rtLimits.maxPrio, newPrio) 3960 : newPrio; 3961 rtInfo->rt_tqsecs = RT_NOCHANGE; 3962 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3963 if (ThreadPriorityVerbose) { 3964 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3965 } 3966 } else if (new_class == iaLimits.schedPolicy) { 3967 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3968 int maxClamped = MIN2(iaLimits.maxPrio, 3969 cur_class == new_class 3970 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3971 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3972 maxClamped, newPrio) 3973 : newPrio; 3974 iaInfo->ia_uprilim = cur_class == new_class 3975 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3976 iaInfo->ia_mode = IA_NOCHANGE; 3977 if (ThreadPriorityVerbose) { 3978 tty->print_cr("IA: [%d...%d] %d->%d\n", 3979 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3980 } 3981 } else if (new_class == tsLimits.schedPolicy) { 3982 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3983 int maxClamped = MIN2(tsLimits.maxPrio, 3984 cur_class == new_class 3985 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3986 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3987 maxClamped, newPrio) 3988 : newPrio; 3989 tsInfo->ts_uprilim = cur_class == new_class 3990 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3991 if (ThreadPriorityVerbose) { 3992 tty->print_cr("TS: [%d...%d] %d->%d\n", 3993 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3994 } 3995 } else if (new_class == fxLimits.schedPolicy) { 3996 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3997 int maxClamped = MIN2(fxLimits.maxPrio, 3998 cur_class == new_class 3999 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 4000 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 4001 maxClamped, newPrio) 4002 : newPrio; 4003 fxInfo->fx_uprilim = cur_class == new_class 4004 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 4005 fxInfo->fx_tqsecs = FX_NOCHANGE; 4006 fxInfo->fx_tqnsecs = FX_NOCHANGE; 4007 if (ThreadPriorityVerbose) { 4008 tty->print_cr("FX: [%d...%d] %d->%d\n", 4009 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 4010 } 4011 } else { 4012 if (ThreadPriorityVerbose) { 4013 tty->print_cr("Unknown new scheduling class %d\n", new_class); 4014 } 4015 return EINVAL; // no clue, punt 4016 } 4017 4018 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 4019 if (ThreadPriorityVerbose && rslt) { 4020 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 4021 } 4022 if (rslt < 0) return errno; 4023 4024 #ifdef ASSERT 4025 // Sanity check: read back what we just attempted to set. 4026 // In theory it could have changed in the interim ... 4027 // 4028 // The priocntl system call is tricky. 4029 // Sometimes it'll validate the priority value argument and 4030 // return EINVAL if unhappy. At other times it fails silently. 4031 // Readbacks are prudent. 4032 4033 if (!ReadBackValidate) return 0; 4034 4035 memset(&ReadBack, 0, sizeof(pcparms_t)); 4036 ReadBack.pc_cid = PC_CLNULL; 4037 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 4038 assert(rslt >= 0, "priocntl failed"); 4039 Actual = Expected = 0xBAD; 4040 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 4041 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 4042 Actual = RTPRI(ReadBack)->rt_pri; 4043 Expected = RTPRI(ParmInfo)->rt_pri; 4044 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 4045 Actual = IAPRI(ReadBack)->ia_upri; 4046 Expected = IAPRI(ParmInfo)->ia_upri; 4047 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 4048 Actual = TSPRI(ReadBack)->ts_upri; 4049 Expected = TSPRI(ParmInfo)->ts_upri; 4050 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 4051 Actual = FXPRI(ReadBack)->fx_upri; 4052 Expected = FXPRI(ParmInfo)->fx_upri; 4053 } else { 4054 if (ThreadPriorityVerbose) { 4055 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 4056 ParmInfo.pc_cid); 4057 } 4058 } 4059 4060 if (Actual != Expected) { 4061 if (ThreadPriorityVerbose) { 4062 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4063 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4064 } 4065 } 4066 #endif 4067 4068 return 0; 4069 } 4070 4071 // Solaris only gives access to 128 real priorities at a time, 4072 // so we expand Java's ten to fill this range. This would be better 4073 // if we dynamically adjusted relative priorities. 4074 // 4075 // The ThreadPriorityPolicy option allows us to select 2 different 4076 // priority scales. 4077 // 4078 // ThreadPriorityPolicy=0 4079 // Since the Solaris' default priority is MaximumPriority, we do not 4080 // set a priority lower than Max unless a priority lower than 4081 // NormPriority is requested. 4082 // 4083 // ThreadPriorityPolicy=1 4084 // This mode causes the priority table to get filled with 4085 // linear values. NormPriority get's mapped to 50% of the 4086 // Maximum priority an so on. This will cause VM threads 4087 // to get unfair treatment against other Solaris processes 4088 // which do not explicitly alter their thread priorities. 4089 // 4090 4091 int os::java_to_os_priority[CriticalPriority + 1] = { 4092 -99999, // 0 Entry should never be used 4093 4094 0, // 1 MinPriority 4095 32, // 2 4096 64, // 3 4097 4098 96, // 4 4099 127, // 5 NormPriority 4100 127, // 6 4101 4102 127, // 7 4103 127, // 8 4104 127, // 9 NearMaxPriority 4105 4106 127, // 10 MaxPriority 4107 4108 -criticalPrio // 11 CriticalPriority 4109 }; 4110 4111 OSReturn os::set_native_priority(Thread* thread, int newpri) { 4112 OSThread* osthread = thread->osthread(); 4113 4114 // Save requested priority in case the thread hasn't been started 4115 osthread->set_native_priority(newpri); 4116 4117 // Check for critical priority request 4118 bool fxcritical = false; 4119 if (newpri == -criticalPrio) { 4120 fxcritical = true; 4121 newpri = criticalPrio; 4122 } 4123 4124 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4125 if (!UseThreadPriorities) return OS_OK; 4126 4127 int status = 0; 4128 4129 if (!fxcritical) { 4130 // Use thr_setprio only if we have a priority that thr_setprio understands 4131 status = thr_setprio(thread->osthread()->thread_id(), newpri); 4132 } 4133 4134 if (os::Solaris::T2_libthread() || 4135 (UseBoundThreads && osthread->is_vm_created())) { 4136 int lwp_status = 4137 set_lwp_class_and_priority(osthread->thread_id(), 4138 osthread->lwp_id(), 4139 newpri, 4140 fxcritical ? fxLimits.schedPolicy : myClass, 4141 !fxcritical); 4142 if (lwp_status != 0 && fxcritical) { 4143 // Try again, this time without changing the scheduling class 4144 newpri = java_MaxPriority_to_os_priority; 4145 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 4146 osthread->lwp_id(), 4147 newpri, myClass, false); 4148 } 4149 status |= lwp_status; 4150 } 4151 return (status == 0) ? OS_OK : OS_ERR; 4152 } 4153 4154 4155 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4156 int p; 4157 if ( !UseThreadPriorities ) { 4158 *priority_ptr = NormalPriority; 4159 return OS_OK; 4160 } 4161 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4162 if (status != 0) { 4163 return OS_ERR; 4164 } 4165 *priority_ptr = p; 4166 return OS_OK; 4167 } 4168 4169 4170 // Hint to the underlying OS that a task switch would not be good. 4171 // Void return because it's a hint and can fail. 4172 void os::hint_no_preempt() { 4173 schedctl_start(schedctl_init()); 4174 } 4175 4176 void os::interrupt(Thread* thread) { 4177 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4178 4179 OSThread* osthread = thread->osthread(); 4180 4181 int isInterrupted = osthread->interrupted(); 4182 if (!isInterrupted) { 4183 osthread->set_interrupted(true); 4184 OrderAccess::fence(); 4185 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4186 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4187 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4188 ParkEvent * const slp = thread->_SleepEvent ; 4189 if (slp != NULL) slp->unpark() ; 4190 } 4191 4192 // For JSR166: unpark after setting status but before thr_kill -dl 4193 if (thread->is_Java_thread()) { 4194 ((JavaThread*)thread)->parker()->unpark(); 4195 } 4196 4197 // Handle interruptible wait() ... 4198 ParkEvent * const ev = thread->_ParkEvent ; 4199 if (ev != NULL) ev->unpark() ; 4200 4201 // When events are used everywhere for os::sleep, then this thr_kill 4202 // will only be needed if UseVMInterruptibleIO is true. 4203 4204 if (!isInterrupted) { 4205 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4206 assert_status(status == 0, status, "thr_kill"); 4207 4208 // Bump thread interruption counter 4209 RuntimeService::record_thread_interrupt_signaled_count(); 4210 } 4211 } 4212 4213 4214 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4215 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4216 4217 OSThread* osthread = thread->osthread(); 4218 4219 bool res = osthread->interrupted(); 4220 4221 // NOTE that since there is no "lock" around these two operations, 4222 // there is the possibility that the interrupted flag will be 4223 // "false" but that the interrupt event will be set. This is 4224 // intentional. The effect of this is that Object.wait() will appear 4225 // to have a spurious wakeup, which is not harmful, and the 4226 // possibility is so rare that it is not worth the added complexity 4227 // to add yet another lock. It has also been recommended not to put 4228 // the interrupted flag into the os::Solaris::Event structure, 4229 // because it hides the issue. 4230 if (res && clear_interrupted) { 4231 osthread->set_interrupted(false); 4232 } 4233 return res; 4234 } 4235 4236 4237 void os::print_statistics() { 4238 } 4239 4240 int os::message_box(const char* title, const char* message) { 4241 int i; 4242 fdStream err(defaultStream::error_fd()); 4243 for (i = 0; i < 78; i++) err.print_raw("="); 4244 err.cr(); 4245 err.print_raw_cr(title); 4246 for (i = 0; i < 78; i++) err.print_raw("-"); 4247 err.cr(); 4248 err.print_raw_cr(message); 4249 for (i = 0; i < 78; i++) err.print_raw("="); 4250 err.cr(); 4251 4252 char buf[16]; 4253 // Prevent process from exiting upon "read error" without consuming all CPU 4254 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4255 4256 return buf[0] == 'y' || buf[0] == 'Y'; 4257 } 4258 4259 // A lightweight implementation that does not suspend the target thread and 4260 // thus returns only a hint. Used for profiling only! 4261 ExtendedPC os::get_thread_pc(Thread* thread) { 4262 // Make sure that it is called by the watcher and the Threads lock is owned. 4263 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4264 // For now, is only used to profile the VM Thread 4265 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4266 ExtendedPC epc; 4267 4268 GetThreadPC_Callback cb(ProfileVM_lock); 4269 OSThread *osthread = thread->osthread(); 4270 const int time_to_wait = 400; // 400ms wait for initial response 4271 int status = cb.interrupt(thread, time_to_wait); 4272 4273 if (cb.is_done() ) { 4274 epc = cb.addr(); 4275 } else { 4276 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4277 osthread->thread_id(), status);); 4278 // epc is already NULL 4279 } 4280 return epc; 4281 } 4282 4283 4284 // This does not do anything on Solaris. This is basically a hook for being 4285 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4286 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4287 f(value, method, args, thread); 4288 } 4289 4290 // This routine may be used by user applications as a "hook" to catch signals. 4291 // The user-defined signal handler must pass unrecognized signals to this 4292 // routine, and if it returns true (non-zero), then the signal handler must 4293 // return immediately. If the flag "abort_if_unrecognized" is true, then this 4294 // routine will never retun false (zero), but instead will execute a VM panic 4295 // routine kill the process. 4296 // 4297 // If this routine returns false, it is OK to call it again. This allows 4298 // the user-defined signal handler to perform checks either before or after 4299 // the VM performs its own checks. Naturally, the user code would be making 4300 // a serious error if it tried to handle an exception (such as a null check 4301 // or breakpoint) that the VM was generating for its own correct operation. 4302 // 4303 // This routine may recognize any of the following kinds of signals: 4304 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4305 // os::Solaris::SIGasync 4306 // It should be consulted by handlers for any of those signals. 4307 // It explicitly does not recognize os::Solaris::SIGinterrupt 4308 // 4309 // The caller of this routine must pass in the three arguments supplied 4310 // to the function referred to in the "sa_sigaction" (not the "sa_handler") 4311 // field of the structure passed to sigaction(). This routine assumes that 4312 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4313 // 4314 // Note that the VM will print warnings if it detects conflicting signal 4315 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4316 // 4317 extern "C" JNIEXPORT int 4318 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 4319 int abort_if_unrecognized); 4320 4321 4322 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4323 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4324 } 4325 4326 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4327 is needed to provoke threads blocked on IO to return an EINTR 4328 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4329 does NOT participate in signal chaining due to requirement for 4330 NOT setting SA_RESTART to make EINTR work. */ 4331 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4332 if (UseSignalChaining) { 4333 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4334 if (actp && actp->sa_handler) { 4335 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4336 } 4337 } 4338 } 4339 4340 // This boolean allows users to forward their own non-matching signals 4341 // to JVM_handle_solaris_signal, harmlessly. 4342 bool os::Solaris::signal_handlers_are_installed = false; 4343 4344 // For signal-chaining 4345 bool os::Solaris::libjsig_is_loaded = false; 4346 typedef struct sigaction *(*get_signal_t)(int); 4347 get_signal_t os::Solaris::get_signal_action = NULL; 4348 4349 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4350 struct sigaction *actp = NULL; 4351 4352 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4353 // Retrieve the old signal handler from libjsig 4354 actp = (*get_signal_action)(sig); 4355 } 4356 if (actp == NULL) { 4357 // Retrieve the preinstalled signal handler from jvm 4358 actp = get_preinstalled_handler(sig); 4359 } 4360 4361 return actp; 4362 } 4363 4364 static bool call_chained_handler(struct sigaction *actp, int sig, 4365 siginfo_t *siginfo, void *context) { 4366 // Call the old signal handler 4367 if (actp->sa_handler == SIG_DFL) { 4368 // It's more reasonable to let jvm treat it as an unexpected exception 4369 // instead of taking the default action. 4370 return false; 4371 } else if (actp->sa_handler != SIG_IGN) { 4372 if ((actp->sa_flags & SA_NODEFER) == 0) { 4373 // automaticlly block the signal 4374 sigaddset(&(actp->sa_mask), sig); 4375 } 4376 4377 sa_handler_t hand; 4378 sa_sigaction_t sa; 4379 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4380 // retrieve the chained handler 4381 if (siginfo_flag_set) { 4382 sa = actp->sa_sigaction; 4383 } else { 4384 hand = actp->sa_handler; 4385 } 4386 4387 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4388 actp->sa_handler = SIG_DFL; 4389 } 4390 4391 // try to honor the signal mask 4392 sigset_t oset; 4393 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4394 4395 // call into the chained handler 4396 if (siginfo_flag_set) { 4397 (*sa)(sig, siginfo, context); 4398 } else { 4399 (*hand)(sig); 4400 } 4401 4402 // restore the signal mask 4403 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4404 } 4405 // Tell jvm's signal handler the signal is taken care of. 4406 return true; 4407 } 4408 4409 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4410 bool chained = false; 4411 // signal-chaining 4412 if (UseSignalChaining) { 4413 struct sigaction *actp = get_chained_signal_action(sig); 4414 if (actp != NULL) { 4415 chained = call_chained_handler(actp, sig, siginfo, context); 4416 } 4417 } 4418 return chained; 4419 } 4420 4421 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4422 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4423 if (preinstalled_sigs[sig] != 0) { 4424 return &chainedsigactions[sig]; 4425 } 4426 return NULL; 4427 } 4428 4429 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4430 4431 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4432 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4433 chainedsigactions[sig] = oldAct; 4434 preinstalled_sigs[sig] = 1; 4435 } 4436 4437 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4438 // Check for overwrite. 4439 struct sigaction oldAct; 4440 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4441 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4442 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4443 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4444 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4445 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4446 if (AllowUserSignalHandlers || !set_installed) { 4447 // Do not overwrite; user takes responsibility to forward to us. 4448 return; 4449 } else if (UseSignalChaining) { 4450 if (oktochain) { 4451 // save the old handler in jvm 4452 save_preinstalled_handler(sig, oldAct); 4453 } else { 4454 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4455 } 4456 // libjsig also interposes the sigaction() call below and saves the 4457 // old sigaction on it own. 4458 } else { 4459 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4460 "%#lx for signal %d.", (long)oldhand, sig)); 4461 } 4462 } 4463 4464 struct sigaction sigAct; 4465 sigfillset(&(sigAct.sa_mask)); 4466 sigAct.sa_handler = SIG_DFL; 4467 4468 sigAct.sa_sigaction = signalHandler; 4469 // Handle SIGSEGV on alternate signal stack if 4470 // not using stack banging 4471 if (!UseStackBanging && sig == SIGSEGV) { 4472 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4473 // Interruptible i/o requires SA_RESTART cleared so EINTR 4474 // is returned instead of restarting system calls 4475 } else if (sig == os::Solaris::SIGinterrupt()) { 4476 sigemptyset(&sigAct.sa_mask); 4477 sigAct.sa_handler = NULL; 4478 sigAct.sa_flags = SA_SIGINFO; 4479 sigAct.sa_sigaction = sigINTRHandler; 4480 } else { 4481 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4482 } 4483 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4484 4485 sigaction(sig, &sigAct, &oldAct); 4486 4487 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4488 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4489 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4490 } 4491 4492 4493 #define DO_SIGNAL_CHECK(sig) \ 4494 if (!sigismember(&check_signal_done, sig)) \ 4495 os::Solaris::check_signal_handler(sig) 4496 4497 // This method is a periodic task to check for misbehaving JNI applications 4498 // under CheckJNI, we can add any periodic checks here 4499 4500 void os::run_periodic_checks() { 4501 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4502 // thereby preventing a NULL checks. 4503 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4504 4505 if (check_signals == false) return; 4506 4507 // SEGV and BUS if overridden could potentially prevent 4508 // generation of hs*.log in the event of a crash, debugging 4509 // such a case can be very challenging, so we absolutely 4510 // check for the following for a good measure: 4511 DO_SIGNAL_CHECK(SIGSEGV); 4512 DO_SIGNAL_CHECK(SIGILL); 4513 DO_SIGNAL_CHECK(SIGFPE); 4514 DO_SIGNAL_CHECK(SIGBUS); 4515 DO_SIGNAL_CHECK(SIGPIPE); 4516 DO_SIGNAL_CHECK(SIGXFSZ); 4517 4518 // ReduceSignalUsage allows the user to override these handlers 4519 // see comments at the very top and jvm_solaris.h 4520 if (!ReduceSignalUsage) { 4521 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4522 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4523 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4524 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4525 } 4526 4527 // See comments above for using JVM1/JVM2 and UseAltSigs 4528 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4529 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4530 4531 } 4532 4533 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4534 4535 static os_sigaction_t os_sigaction = NULL; 4536 4537 void os::Solaris::check_signal_handler(int sig) { 4538 char buf[O_BUFLEN]; 4539 address jvmHandler = NULL; 4540 4541 struct sigaction act; 4542 if (os_sigaction == NULL) { 4543 // only trust the default sigaction, in case it has been interposed 4544 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4545 if (os_sigaction == NULL) return; 4546 } 4547 4548 os_sigaction(sig, (struct sigaction*)NULL, &act); 4549 4550 address thisHandler = (act.sa_flags & SA_SIGINFO) 4551 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4552 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4553 4554 4555 switch(sig) { 4556 case SIGSEGV: 4557 case SIGBUS: 4558 case SIGFPE: 4559 case SIGPIPE: 4560 case SIGXFSZ: 4561 case SIGILL: 4562 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4563 break; 4564 4565 case SHUTDOWN1_SIGNAL: 4566 case SHUTDOWN2_SIGNAL: 4567 case SHUTDOWN3_SIGNAL: 4568 case BREAK_SIGNAL: 4569 jvmHandler = (address)user_handler(); 4570 break; 4571 4572 default: 4573 int intrsig = os::Solaris::SIGinterrupt(); 4574 int asynsig = os::Solaris::SIGasync(); 4575 4576 if (sig == intrsig) { 4577 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4578 } else if (sig == asynsig) { 4579 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4580 } else { 4581 return; 4582 } 4583 break; 4584 } 4585 4586 4587 if (thisHandler != jvmHandler) { 4588 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4589 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4590 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4591 // No need to check this sig any longer 4592 sigaddset(&check_signal_done, sig); 4593 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4594 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4595 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4596 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4597 // No need to check this sig any longer 4598 sigaddset(&check_signal_done, sig); 4599 } 4600 4601 // Print all the signal handler state 4602 if (sigismember(&check_signal_done, sig)) { 4603 print_signal_handlers(tty, buf, O_BUFLEN); 4604 } 4605 4606 } 4607 4608 void os::Solaris::install_signal_handlers() { 4609 bool libjsigdone = false; 4610 signal_handlers_are_installed = true; 4611 4612 // signal-chaining 4613 typedef void (*signal_setting_t)(); 4614 signal_setting_t begin_signal_setting = NULL; 4615 signal_setting_t end_signal_setting = NULL; 4616 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4617 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4618 if (begin_signal_setting != NULL) { 4619 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4620 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4621 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4622 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4623 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4624 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4625 libjsig_is_loaded = true; 4626 if (os::Solaris::get_libjsig_version != NULL) { 4627 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4628 } 4629 assert(UseSignalChaining, "should enable signal-chaining"); 4630 } 4631 if (libjsig_is_loaded) { 4632 // Tell libjsig jvm is setting signal handlers 4633 (*begin_signal_setting)(); 4634 } 4635 4636 set_signal_handler(SIGSEGV, true, true); 4637 set_signal_handler(SIGPIPE, true, true); 4638 set_signal_handler(SIGXFSZ, true, true); 4639 set_signal_handler(SIGBUS, true, true); 4640 set_signal_handler(SIGILL, true, true); 4641 set_signal_handler(SIGFPE, true, true); 4642 4643 4644 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4645 4646 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4647 // can not register overridable signals which might be > 32 4648 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4649 // Tell libjsig jvm has finished setting signal handlers 4650 (*end_signal_setting)(); 4651 libjsigdone = true; 4652 } 4653 } 4654 4655 // Never ok to chain our SIGinterrupt 4656 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4657 set_signal_handler(os::Solaris::SIGasync(), true, true); 4658 4659 if (libjsig_is_loaded && !libjsigdone) { 4660 // Tell libjsig jvm finishes setting signal handlers 4661 (*end_signal_setting)(); 4662 } 4663 4664 // We don't activate signal checker if libjsig is in place, we trust ourselves 4665 // and if UserSignalHandler is installed all bets are off. 4666 // Log that signal checking is off only if -verbose:jni is specified. 4667 if (CheckJNICalls) { 4668 if (libjsig_is_loaded) { 4669 if (PrintJNIResolving) { 4670 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4671 } 4672 check_signals = false; 4673 } 4674 if (AllowUserSignalHandlers) { 4675 if (PrintJNIResolving) { 4676 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4677 } 4678 check_signals = false; 4679 } 4680 } 4681 } 4682 4683 4684 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4685 4686 const char * signames[] = { 4687 "SIG0", 4688 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4689 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4690 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4691 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4692 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4693 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4694 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4695 "SIGCANCEL", "SIGLOST" 4696 }; 4697 4698 const char* os::exception_name(int exception_code, char* buf, size_t size) { 4699 if (0 < exception_code && exception_code <= SIGRTMAX) { 4700 // signal 4701 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4702 jio_snprintf(buf, size, "%s", signames[exception_code]); 4703 } else { 4704 jio_snprintf(buf, size, "SIG%d", exception_code); 4705 } 4706 return buf; 4707 } else { 4708 return NULL; 4709 } 4710 } 4711 4712 // (Static) wrappers for the new libthread API 4713 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4714 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4715 int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4716 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4717 int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4718 4719 // (Static) wrapper for getisax(2) call. 4720 os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4721 4722 // (Static) wrappers for the liblgrp API 4723 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4724 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4725 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4726 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4727 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4728 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4729 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4730 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4731 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4732 4733 // (Static) wrapper for meminfo() call. 4734 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4735 4736 static address resolve_symbol_lazy(const char* name) { 4737 address addr = (address) dlsym(RTLD_DEFAULT, name); 4738 if(addr == NULL) { 4739 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4740 addr = (address) dlsym(RTLD_NEXT, name); 4741 } 4742 return addr; 4743 } 4744 4745 static address resolve_symbol(const char* name) { 4746 address addr = resolve_symbol_lazy(name); 4747 if(addr == NULL) { 4748 fatal(dlerror()); 4749 } 4750 return addr; 4751 } 4752 4753 4754 4755 // isT2_libthread() 4756 // 4757 // Routine to determine if we are currently using the new T2 libthread. 4758 // 4759 // We determine if we are using T2 by reading /proc/self/lstatus and 4760 // looking for a thread with the ASLWP bit set. If we find this status 4761 // bit set, we must assume that we are NOT using T2. The T2 team 4762 // has approved this algorithm. 4763 // 4764 // We need to determine if we are running with the new T2 libthread 4765 // since setting native thread priorities is handled differently 4766 // when using this library. All threads created using T2 are bound 4767 // threads. Calling thr_setprio is meaningless in this case. 4768 // 4769 bool isT2_libthread() { 4770 static prheader_t * lwpArray = NULL; 4771 static int lwpSize = 0; 4772 static int lwpFile = -1; 4773 lwpstatus_t * that; 4774 char lwpName [128]; 4775 bool isT2 = false; 4776 4777 #define ADR(x) ((uintptr_t)(x)) 4778 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4779 4780 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4781 if (lwpFile < 0) { 4782 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4783 return false; 4784 } 4785 lwpSize = 16*1024; 4786 for (;;) { 4787 ::lseek64 (lwpFile, 0, SEEK_SET); 4788 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize, mtInternal); 4789 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4790 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4791 break; 4792 } 4793 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4794 // We got a good snapshot - now iterate over the list. 4795 int aslwpcount = 0; 4796 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4797 that = LWPINDEX(lwpArray,i); 4798 if (that->pr_flags & PR_ASLWP) { 4799 aslwpcount++; 4800 } 4801 } 4802 if (aslwpcount == 0) isT2 = true; 4803 break; 4804 } 4805 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4806 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); // retry. 4807 } 4808 4809 FREE_C_HEAP_ARRAY(char, lwpArray, mtInternal); 4810 ::close (lwpFile); 4811 if (ThreadPriorityVerbose) { 4812 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4813 else tty->print_cr("We are not running with a T2 libthread\n"); 4814 } 4815 return isT2; 4816 } 4817 4818 4819 void os::Solaris::libthread_init() { 4820 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4821 4822 // Determine if we are running with the new T2 libthread 4823 os::Solaris::set_T2_libthread(isT2_libthread()); 4824 4825 lwp_priocntl_init(); 4826 4827 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4828 if(func == NULL) { 4829 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4830 // Guarantee that this VM is running on an new enough OS (5.6 or 4831 // later) that it will have a new enough libthread.so. 4832 guarantee(func != NULL, "libthread.so is too old."); 4833 } 4834 4835 // Initialize the new libthread getstate API wrappers 4836 func = resolve_symbol("thr_getstate"); 4837 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4838 4839 func = resolve_symbol("thr_setstate"); 4840 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4841 4842 func = resolve_symbol("thr_setmutator"); 4843 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4844 4845 func = resolve_symbol("thr_suspend_mutator"); 4846 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4847 4848 func = resolve_symbol("thr_continue_mutator"); 4849 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4850 4851 int size; 4852 void (*handler_info_func)(address *, int *); 4853 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4854 handler_info_func(&handler_start, &size); 4855 handler_end = handler_start + size; 4856 } 4857 4858 4859 int_fnP_mutex_tP os::Solaris::_mutex_lock; 4860 int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4861 int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4862 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4863 int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4864 int os::Solaris::_mutex_scope = USYNC_THREAD; 4865 4866 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4867 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4868 int_fnP_cond_tP os::Solaris::_cond_signal; 4869 int_fnP_cond_tP os::Solaris::_cond_broadcast; 4870 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4871 int_fnP_cond_tP os::Solaris::_cond_destroy; 4872 int os::Solaris::_cond_scope = USYNC_THREAD; 4873 4874 void os::Solaris::synchronization_init() { 4875 if(UseLWPSynchronization) { 4876 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4877 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4878 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4879 os::Solaris::set_mutex_init(lwp_mutex_init); 4880 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4881 os::Solaris::set_mutex_scope(USYNC_THREAD); 4882 4883 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4884 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4885 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4886 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4887 os::Solaris::set_cond_init(lwp_cond_init); 4888 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4889 os::Solaris::set_cond_scope(USYNC_THREAD); 4890 } 4891 else { 4892 os::Solaris::set_mutex_scope(USYNC_THREAD); 4893 os::Solaris::set_cond_scope(USYNC_THREAD); 4894 4895 if(UsePthreads) { 4896 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4897 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4898 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4899 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4900 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4901 4902 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4903 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4904 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4905 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4906 os::Solaris::set_cond_init(pthread_cond_default_init); 4907 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4908 } 4909 else { 4910 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4911 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4912 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4913 os::Solaris::set_mutex_init(::mutex_init); 4914 os::Solaris::set_mutex_destroy(::mutex_destroy); 4915 4916 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4917 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4918 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4919 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4920 os::Solaris::set_cond_init(::cond_init); 4921 os::Solaris::set_cond_destroy(::cond_destroy); 4922 } 4923 } 4924 } 4925 4926 bool os::Solaris::liblgrp_init() { 4927 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4928 if (handle != NULL) { 4929 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4930 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4931 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4932 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4933 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4934 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4935 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4936 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4937 dlsym(handle, "lgrp_cookie_stale"))); 4938 4939 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4940 set_lgrp_cookie(c); 4941 return true; 4942 } 4943 return false; 4944 } 4945 4946 void os::Solaris::misc_sym_init() { 4947 address func; 4948 4949 // getisax 4950 func = resolve_symbol_lazy("getisax"); 4951 if (func != NULL) { 4952 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4953 } 4954 4955 // meminfo 4956 func = resolve_symbol_lazy("meminfo"); 4957 if (func != NULL) { 4958 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4959 } 4960 } 4961 4962 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4963 assert(_getisax != NULL, "_getisax not set"); 4964 return _getisax(array, n); 4965 } 4966 4967 // Symbol doesn't exist in Solaris 8 pset.h 4968 #ifndef PS_MYID 4969 #define PS_MYID -3 4970 #endif 4971 4972 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4973 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4974 static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4975 4976 void init_pset_getloadavg_ptr(void) { 4977 pset_getloadavg_ptr = 4978 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4979 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4980 warning("pset_getloadavg function not found"); 4981 } 4982 } 4983 4984 int os::Solaris::_dev_zero_fd = -1; 4985 4986 // this is called _before_ the global arguments have been parsed 4987 void os::init(void) { 4988 _initial_pid = getpid(); 4989 4990 max_hrtime = first_hrtime = gethrtime(); 4991 4992 init_random(1234567); 4993 4994 page_size = sysconf(_SC_PAGESIZE); 4995 if (page_size == -1) 4996 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4997 strerror(errno))); 4998 init_page_sizes((size_t) page_size); 4999 5000 Solaris::initialize_system_info(); 5001 5002 // Initialize misc. symbols as soon as possible, so we can use them 5003 // if we need them. 5004 Solaris::misc_sym_init(); 5005 5006 int fd = ::open("/dev/zero", O_RDWR); 5007 if (fd < 0) { 5008 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 5009 } else { 5010 Solaris::set_dev_zero_fd(fd); 5011 5012 // Close on exec, child won't inherit. 5013 fcntl(fd, F_SETFD, FD_CLOEXEC); 5014 } 5015 5016 clock_tics_per_sec = CLK_TCK; 5017 5018 // check if dladdr1() exists; dladdr1 can provide more information than 5019 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 5020 // and is available on linker patches for 5.7 and 5.8. 5021 // libdl.so must have been loaded, this call is just an entry lookup 5022 void * hdl = dlopen("libdl.so", RTLD_NOW); 5023 if (hdl) 5024 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 5025 5026 // (Solaris only) this switches to calls that actually do locking. 5027 ThreadCritical::initialize(); 5028 5029 main_thread = thr_self(); 5030 5031 // Constant minimum stack size allowed. It must be at least 5032 // the minimum of what the OS supports (thr_min_stack()), and 5033 // enough to allow the thread to get to user bytecode execution. 5034 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 5035 // If the pagesize of the VM is greater than 8K determine the appropriate 5036 // number of initial guard pages. The user can change this with the 5037 // command line arguments, if needed. 5038 if (vm_page_size() > 8*K) { 5039 StackYellowPages = 1; 5040 StackRedPages = 1; 5041 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 5042 } 5043 } 5044 5045 // To install functions for atexit system call 5046 extern "C" { 5047 static void perfMemory_exit_helper() { 5048 perfMemory_exit(); 5049 } 5050 } 5051 5052 // this is called _after_ the global arguments have been parsed 5053 jint os::init_2(void) { 5054 // try to enable extended file IO ASAP, see 6431278 5055 os::Solaris::try_enable_extended_io(); 5056 5057 // Allocate a single page and mark it as readable for safepoint polling. Also 5058 // use this first mmap call to check support for MAP_ALIGN. 5059 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 5060 page_size, 5061 MAP_PRIVATE | MAP_ALIGN, 5062 PROT_READ); 5063 if (polling_page == NULL) { 5064 has_map_align = false; 5065 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 5066 PROT_READ); 5067 } 5068 5069 os::set_polling_page(polling_page); 5070 5071 #ifndef PRODUCT 5072 if( Verbose && PrintMiscellaneous ) 5073 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 5074 #endif 5075 5076 if (!UseMembar) { 5077 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 5078 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 5079 os::set_memory_serialize_page( mem_serialize_page ); 5080 5081 #ifndef PRODUCT 5082 if(Verbose && PrintMiscellaneous) 5083 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 5084 #endif 5085 } 5086 5087 os::large_page_init(); 5088 5089 // Check minimum allowable stack size for thread creation and to initialize 5090 // the java system classes, including StackOverflowError - depends on page 5091 // size. Add a page for compiler2 recursion in main thread. 5092 // Add in 2*BytesPerWord times page size to account for VM stack during 5093 // class initialization depending on 32 or 64 bit VM. 5094 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 5095 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5096 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5097 5098 size_t threadStackSizeInBytes = ThreadStackSize * K; 5099 if (threadStackSizeInBytes != 0 && 5100 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5101 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5102 os::Solaris::min_stack_allowed/K); 5103 return JNI_ERR; 5104 } 5105 5106 // For 64kbps there will be a 64kb page size, which makes 5107 // the usable default stack size quite a bit less. Increase the 5108 // stack for 64kb (or any > than 8kb) pages, this increases 5109 // virtual memory fragmentation (since we're not creating the 5110 // stack on a power of 2 boundary. The real fix for this 5111 // should be to fix the guard page mechanism. 5112 5113 if (vm_page_size() > 8*K) { 5114 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5115 ? threadStackSizeInBytes + 5116 ((StackYellowPages + StackRedPages) * vm_page_size()) 5117 : 0; 5118 ThreadStackSize = threadStackSizeInBytes/K; 5119 } 5120 5121 // Make the stack size a multiple of the page size so that 5122 // the yellow/red zones can be guarded. 5123 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5124 vm_page_size())); 5125 5126 Solaris::libthread_init(); 5127 5128 if (UseNUMA) { 5129 if (!Solaris::liblgrp_init()) { 5130 UseNUMA = false; 5131 } else { 5132 size_t lgrp_limit = os::numa_get_groups_num(); 5133 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 5134 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5135 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 5136 if (lgrp_num < 2) { 5137 // There's only one locality group, disable NUMA. 5138 UseNUMA = false; 5139 } 5140 } 5141 // ISM is not compatible with the NUMA allocator - it always allocates 5142 // pages round-robin across the lgroups. 5143 if (UseNUMA && UseLargePages && UseISM) { 5144 if (!FLAG_IS_DEFAULT(UseNUMA)) { 5145 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) { 5146 UseLargePages = false; 5147 } else { 5148 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator"); 5149 UseNUMA = false; 5150 } 5151 } else { 5152 UseNUMA = false; 5153 } 5154 } 5155 if (!UseNUMA && ForceNUMA) { 5156 UseNUMA = true; 5157 } 5158 } 5159 5160 Solaris::signal_sets_init(); 5161 Solaris::init_signal_mem(); 5162 Solaris::install_signal_handlers(); 5163 5164 if (libjsigversion < JSIG_VERSION_1_4_1) { 5165 Maxlibjsigsigs = OLDMAXSIGNUM; 5166 } 5167 5168 // initialize synchronization primitives to use either thread or 5169 // lwp synchronization (controlled by UseLWPSynchronization) 5170 Solaris::synchronization_init(); 5171 5172 if (MaxFDLimit) { 5173 // set the number of file descriptors to max. print out error 5174 // if getrlimit/setrlimit fails but continue regardless. 5175 struct rlimit nbr_files; 5176 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5177 if (status != 0) { 5178 if (PrintMiscellaneous && (Verbose || WizardMode)) 5179 perror("os::init_2 getrlimit failed"); 5180 } else { 5181 nbr_files.rlim_cur = nbr_files.rlim_max; 5182 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5183 if (status != 0) { 5184 if (PrintMiscellaneous && (Verbose || WizardMode)) 5185 perror("os::init_2 setrlimit failed"); 5186 } 5187 } 5188 } 5189 5190 // Calculate theoretical max. size of Threads to guard gainst 5191 // artifical out-of-memory situations, where all available address- 5192 // space has been reserved by thread stacks. Default stack size is 1Mb. 5193 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5194 JavaThread::stack_size_at_create() : (1*K*K); 5195 assert(pre_thread_stack_size != 0, "Must have a stack"); 5196 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5197 // we should start doing Virtual Memory banging. Currently when the threads will 5198 // have used all but 200Mb of space. 5199 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5200 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5201 5202 // at-exit methods are called in the reverse order of their registration. 5203 // In Solaris 7 and earlier, atexit functions are called on return from 5204 // main or as a result of a call to exit(3C). There can be only 32 of 5205 // these functions registered and atexit() does not set errno. In Solaris 5206 // 8 and later, there is no limit to the number of functions registered 5207 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5208 // functions are called upon dlclose(3DL) in addition to return from main 5209 // and exit(3C). 5210 5211 if (PerfAllowAtExitRegistration) { 5212 // only register atexit functions if PerfAllowAtExitRegistration is set. 5213 // atexit functions can be delayed until process exit time, which 5214 // can be problematic for embedded VM situations. Embedded VMs should 5215 // call DestroyJavaVM() to assure that VM resources are released. 5216 5217 // note: perfMemory_exit_helper atexit function may be removed in 5218 // the future if the appropriate cleanup code can be added to the 5219 // VM_Exit VMOperation's doit method. 5220 if (atexit(perfMemory_exit_helper) != 0) { 5221 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5222 } 5223 } 5224 5225 // Init pset_loadavg function pointer 5226 init_pset_getloadavg_ptr(); 5227 5228 return JNI_OK; 5229 } 5230 5231 void os::init_3(void) { 5232 return; 5233 } 5234 5235 // Mark the polling page as unreadable 5236 void os::make_polling_page_unreadable(void) { 5237 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5238 fatal("Could not disable polling page"); 5239 }; 5240 5241 // Mark the polling page as readable 5242 void os::make_polling_page_readable(void) { 5243 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5244 fatal("Could not enable polling page"); 5245 }; 5246 5247 // OS interface. 5248 5249 bool os::check_heap(bool force) { return true; } 5250 5251 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5252 static vsnprintf_t sol_vsnprintf = NULL; 5253 5254 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5255 if (!sol_vsnprintf) { 5256 //search for the named symbol in the objects that were loaded after libjvm 5257 void* where = RTLD_NEXT; 5258 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5259 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5260 if (!sol_vsnprintf){ 5261 //search for the named symbol in the objects that were loaded before libjvm 5262 where = RTLD_DEFAULT; 5263 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5264 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5265 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5266 } 5267 } 5268 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5269 } 5270 5271 5272 // Is a (classpath) directory empty? 5273 bool os::dir_is_empty(const char* path) { 5274 DIR *dir = NULL; 5275 struct dirent *ptr; 5276 5277 dir = opendir(path); 5278 if (dir == NULL) return true; 5279 5280 /* Scan the directory */ 5281 bool result = true; 5282 char buf[sizeof(struct dirent) + MAX_PATH]; 5283 struct dirent *dbuf = (struct dirent *) buf; 5284 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5285 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5286 result = false; 5287 } 5288 } 5289 closedir(dir); 5290 return result; 5291 } 5292 5293 // This code originates from JDK's sysOpen and open64_w 5294 // from src/solaris/hpi/src/system_md.c 5295 5296 #ifndef O_DELETE 5297 #define O_DELETE 0x10000 5298 #endif 5299 5300 // Open a file. Unlink the file immediately after open returns 5301 // if the specified oflag has the O_DELETE flag set. 5302 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5303 5304 int os::open(const char *path, int oflag, int mode) { 5305 if (strlen(path) > MAX_PATH - 1) { 5306 errno = ENAMETOOLONG; 5307 return -1; 5308 } 5309 int fd; 5310 int o_delete = (oflag & O_DELETE); 5311 oflag = oflag & ~O_DELETE; 5312 5313 fd = ::open64(path, oflag, mode); 5314 if (fd == -1) return -1; 5315 5316 //If the open succeeded, the file might still be a directory 5317 { 5318 struct stat64 buf64; 5319 int ret = ::fstat64(fd, &buf64); 5320 int st_mode = buf64.st_mode; 5321 5322 if (ret != -1) { 5323 if ((st_mode & S_IFMT) == S_IFDIR) { 5324 errno = EISDIR; 5325 ::close(fd); 5326 return -1; 5327 } 5328 } else { 5329 ::close(fd); 5330 return -1; 5331 } 5332 } 5333 /* 5334 * 32-bit Solaris systems suffer from: 5335 * 5336 * - an historical default soft limit of 256 per-process file 5337 * descriptors that is too low for many Java programs. 5338 * 5339 * - a design flaw where file descriptors created using stdio 5340 * fopen must be less than 256, _even_ when the first limit above 5341 * has been raised. This can cause calls to fopen (but not calls to 5342 * open, for example) to fail mysteriously, perhaps in 3rd party 5343 * native code (although the JDK itself uses fopen). One can hardly 5344 * criticize them for using this most standard of all functions. 5345 * 5346 * We attempt to make everything work anyways by: 5347 * 5348 * - raising the soft limit on per-process file descriptors beyond 5349 * 256 5350 * 5351 * - As of Solaris 10u4, we can request that Solaris raise the 256 5352 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5353 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5354 * 5355 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5356 * workaround the bug by remapping non-stdio file descriptors below 5357 * 256 to ones beyond 256, which is done below. 5358 * 5359 * See: 5360 * 1085341: 32-bit stdio routines should support file descriptors >255 5361 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5362 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5363 * enable_extended_FILE_stdio() in VM initialisation 5364 * Giri Mandalika's blog 5365 * http://technopark02.blogspot.com/2005_05_01_archive.html 5366 */ 5367 #ifndef _LP64 5368 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5369 int newfd = ::fcntl(fd, F_DUPFD, 256); 5370 if (newfd != -1) { 5371 ::close(fd); 5372 fd = newfd; 5373 } 5374 } 5375 #endif // 32-bit Solaris 5376 /* 5377 * All file descriptors that are opened in the JVM and not 5378 * specifically destined for a subprocess should have the 5379 * close-on-exec flag set. If we don't set it, then careless 3rd 5380 * party native code might fork and exec without closing all 5381 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5382 * UNIXProcess.c), and this in turn might: 5383 * 5384 * - cause end-of-file to fail to be detected on some file 5385 * descriptors, resulting in mysterious hangs, or 5386 * 5387 * - might cause an fopen in the subprocess to fail on a system 5388 * suffering from bug 1085341. 5389 * 5390 * (Yes, the default setting of the close-on-exec flag is a Unix 5391 * design flaw) 5392 * 5393 * See: 5394 * 1085341: 32-bit stdio routines should support file descriptors >255 5395 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5396 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5397 */ 5398 #ifdef FD_CLOEXEC 5399 { 5400 int flags = ::fcntl(fd, F_GETFD); 5401 if (flags != -1) 5402 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5403 } 5404 #endif 5405 5406 if (o_delete != 0) { 5407 ::unlink(path); 5408 } 5409 return fd; 5410 } 5411 5412 // create binary file, rewriting existing file if required 5413 int os::create_binary_file(const char* path, bool rewrite_existing) { 5414 int oflags = O_WRONLY | O_CREAT; 5415 if (!rewrite_existing) { 5416 oflags |= O_EXCL; 5417 } 5418 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5419 } 5420 5421 // return current position of file pointer 5422 jlong os::current_file_offset(int fd) { 5423 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5424 } 5425 5426 // move file pointer to the specified offset 5427 jlong os::seek_to_file_offset(int fd, jlong offset) { 5428 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5429 } 5430 5431 jlong os::lseek(int fd, jlong offset, int whence) { 5432 return (jlong) ::lseek64(fd, offset, whence); 5433 } 5434 5435 char * os::native_path(char *path) { 5436 return path; 5437 } 5438 5439 int os::ftruncate(int fd, jlong length) { 5440 return ::ftruncate64(fd, length); 5441 } 5442 5443 int os::fsync(int fd) { 5444 RESTARTABLE_RETURN_INT(::fsync(fd)); 5445 } 5446 5447 int os::available(int fd, jlong *bytes) { 5448 jlong cur, end; 5449 int mode; 5450 struct stat64 buf64; 5451 5452 if (::fstat64(fd, &buf64) >= 0) { 5453 mode = buf64.st_mode; 5454 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5455 /* 5456 * XXX: is the following call interruptible? If so, this might 5457 * need to go through the INTERRUPT_IO() wrapper as for other 5458 * blocking, interruptible calls in this file. 5459 */ 5460 int n,ioctl_return; 5461 5462 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5463 if (ioctl_return>= 0) { 5464 *bytes = n; 5465 return 1; 5466 } 5467 } 5468 } 5469 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5470 return 0; 5471 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5472 return 0; 5473 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5474 return 0; 5475 } 5476 *bytes = end - cur; 5477 return 1; 5478 } 5479 5480 // Map a block of memory. 5481 char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 5482 char *addr, size_t bytes, bool read_only, 5483 bool allow_exec) { 5484 int prot; 5485 int flags; 5486 5487 if (read_only) { 5488 prot = PROT_READ; 5489 flags = MAP_SHARED; 5490 } else { 5491 prot = PROT_READ | PROT_WRITE; 5492 flags = MAP_PRIVATE; 5493 } 5494 5495 if (allow_exec) { 5496 prot |= PROT_EXEC; 5497 } 5498 5499 if (addr != NULL) { 5500 flags |= MAP_FIXED; 5501 } 5502 5503 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5504 fd, file_offset); 5505 if (mapped_address == MAP_FAILED) { 5506 return NULL; 5507 } 5508 return mapped_address; 5509 } 5510 5511 5512 // Remap a block of memory. 5513 char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5514 char *addr, size_t bytes, bool read_only, 5515 bool allow_exec) { 5516 // same as map_memory() on this OS 5517 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5518 allow_exec); 5519 } 5520 5521 5522 // Unmap a block of memory. 5523 bool os::pd_unmap_memory(char* addr, size_t bytes) { 5524 return munmap(addr, bytes) == 0; 5525 } 5526 5527 void os::pause() { 5528 char filename[MAX_PATH]; 5529 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5530 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5531 } else { 5532 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5533 } 5534 5535 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5536 if (fd != -1) { 5537 struct stat buf; 5538 ::close(fd); 5539 while (::stat(filename, &buf) == 0) { 5540 (void)::poll(NULL, 0, 100); 5541 } 5542 } else { 5543 jio_fprintf(stderr, 5544 "Could not open pause file '%s', continuing immediately.\n", filename); 5545 } 5546 } 5547 5548 #ifndef PRODUCT 5549 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5550 // Turn this on if you need to trace synch operations. 5551 // Set RECORD_SYNCH_LIMIT to a large-enough value, 5552 // and call record_synch_enable and record_synch_disable 5553 // around the computation of interest. 5554 5555 void record_synch(char* name, bool returning); // defined below 5556 5557 class RecordSynch { 5558 char* _name; 5559 public: 5560 RecordSynch(char* name) :_name(name) 5561 { record_synch(_name, false); } 5562 ~RecordSynch() { record_synch(_name, true); } 5563 }; 5564 5565 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5566 extern "C" ret name params { \ 5567 typedef ret name##_t params; \ 5568 static name##_t* implem = NULL; \ 5569 static int callcount = 0; \ 5570 if (implem == NULL) { \ 5571 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5572 if (implem == NULL) fatal(dlerror()); \ 5573 } \ 5574 ++callcount; \ 5575 RecordSynch _rs(#name); \ 5576 inner; \ 5577 return implem args; \ 5578 } 5579 // in dbx, examine callcounts this way: 5580 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5581 5582 #define CHECK_POINTER_OK(p) \ 5583 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5584 #define CHECK_MU \ 5585 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5586 #define CHECK_CV \ 5587 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5588 #define CHECK_P(p) \ 5589 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5590 5591 #define CHECK_MUTEX(mutex_op) \ 5592 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5593 5594 CHECK_MUTEX( mutex_lock) 5595 CHECK_MUTEX( _mutex_lock) 5596 CHECK_MUTEX( mutex_unlock) 5597 CHECK_MUTEX(_mutex_unlock) 5598 CHECK_MUTEX( mutex_trylock) 5599 CHECK_MUTEX(_mutex_trylock) 5600 5601 #define CHECK_COND(cond_op) \ 5602 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5603 5604 CHECK_COND( cond_wait); 5605 CHECK_COND(_cond_wait); 5606 CHECK_COND(_cond_wait_cancel); 5607 5608 #define CHECK_COND2(cond_op) \ 5609 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5610 5611 CHECK_COND2( cond_timedwait); 5612 CHECK_COND2(_cond_timedwait); 5613 CHECK_COND2(_cond_timedwait_cancel); 5614 5615 // do the _lwp_* versions too 5616 #define mutex_t lwp_mutex_t 5617 #define cond_t lwp_cond_t 5618 CHECK_MUTEX( _lwp_mutex_lock) 5619 CHECK_MUTEX( _lwp_mutex_unlock) 5620 CHECK_MUTEX( _lwp_mutex_trylock) 5621 CHECK_MUTEX( __lwp_mutex_lock) 5622 CHECK_MUTEX( __lwp_mutex_unlock) 5623 CHECK_MUTEX( __lwp_mutex_trylock) 5624 CHECK_MUTEX(___lwp_mutex_lock) 5625 CHECK_MUTEX(___lwp_mutex_unlock) 5626 5627 CHECK_COND( _lwp_cond_wait); 5628 CHECK_COND( __lwp_cond_wait); 5629 CHECK_COND(___lwp_cond_wait); 5630 5631 CHECK_COND2( _lwp_cond_timedwait); 5632 CHECK_COND2( __lwp_cond_timedwait); 5633 #undef mutex_t 5634 #undef cond_t 5635 5636 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5637 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5638 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5639 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5640 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5641 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5642 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5643 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5644 5645 5646 // recording machinery: 5647 5648 enum { RECORD_SYNCH_LIMIT = 200 }; 5649 char* record_synch_name[RECORD_SYNCH_LIMIT]; 5650 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5651 bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5652 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5653 int record_synch_count = 0; 5654 bool record_synch_enabled = false; 5655 5656 // in dbx, examine recorded data this way: 5657 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5658 5659 void record_synch(char* name, bool returning) { 5660 if (record_synch_enabled) { 5661 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5662 record_synch_name[record_synch_count] = name; 5663 record_synch_returning[record_synch_count] = returning; 5664 record_synch_thread[record_synch_count] = thr_self(); 5665 record_synch_arg0ptr[record_synch_count] = &name; 5666 record_synch_count++; 5667 } 5668 // put more checking code here: 5669 // ... 5670 } 5671 } 5672 5673 void record_synch_enable() { 5674 // start collecting trace data, if not already doing so 5675 if (!record_synch_enabled) record_synch_count = 0; 5676 record_synch_enabled = true; 5677 } 5678 5679 void record_synch_disable() { 5680 // stop collecting trace data 5681 record_synch_enabled = false; 5682 } 5683 5684 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5685 #endif // PRODUCT 5686 5687 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5688 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5689 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5690 5691 5692 // JVMTI & JVM monitoring and management support 5693 // The thread_cpu_time() and current_thread_cpu_time() are only 5694 // supported if is_thread_cpu_time_supported() returns true. 5695 // They are not supported on Solaris T1. 5696 5697 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5698 // are used by JVM M&M and JVMTI to get user+sys or user CPU time 5699 // of a thread. 5700 // 5701 // current_thread_cpu_time() and thread_cpu_time(Thread *) 5702 // returns the fast estimate available on the platform. 5703 5704 // hrtime_t gethrvtime() return value includes 5705 // user time but does not include system time 5706 jlong os::current_thread_cpu_time() { 5707 return (jlong) gethrvtime(); 5708 } 5709 5710 jlong os::thread_cpu_time(Thread *thread) { 5711 // return user level CPU time only to be consistent with 5712 // what current_thread_cpu_time returns. 5713 // thread_cpu_time_info() must be changed if this changes 5714 return os::thread_cpu_time(thread, false /* user time only */); 5715 } 5716 5717 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5718 if (user_sys_cpu_time) { 5719 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5720 } else { 5721 return os::current_thread_cpu_time(); 5722 } 5723 } 5724 5725 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5726 char proc_name[64]; 5727 int count; 5728 prusage_t prusage; 5729 jlong lwp_time; 5730 int fd; 5731 5732 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5733 getpid(), 5734 thread->osthread()->lwp_id()); 5735 fd = ::open(proc_name, O_RDONLY); 5736 if ( fd == -1 ) return -1; 5737 5738 do { 5739 count = ::pread(fd, 5740 (void *)&prusage.pr_utime, 5741 thr_time_size, 5742 thr_time_off); 5743 } while (count < 0 && errno == EINTR); 5744 ::close(fd); 5745 if ( count < 0 ) return -1; 5746 5747 if (user_sys_cpu_time) { 5748 // user + system CPU time 5749 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5750 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5751 (jlong)prusage.pr_stime.tv_nsec + 5752 (jlong)prusage.pr_utime.tv_nsec; 5753 } else { 5754 // user level CPU time only 5755 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5756 (jlong)prusage.pr_utime.tv_nsec; 5757 } 5758 5759 return(lwp_time); 5760 } 5761 5762 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5763 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5764 info_ptr->may_skip_backward = false; // elapsed time not wall time 5765 info_ptr->may_skip_forward = false; // elapsed time not wall time 5766 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5767 } 5768 5769 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5770 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5771 info_ptr->may_skip_backward = false; // elapsed time not wall time 5772 info_ptr->may_skip_forward = false; // elapsed time not wall time 5773 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5774 } 5775 5776 bool os::is_thread_cpu_time_supported() { 5777 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5778 return true; 5779 } else { 5780 return false; 5781 } 5782 } 5783 5784 // System loadavg support. Returns -1 if load average cannot be obtained. 5785 // Return the load average for our processor set if the primitive exists 5786 // (Solaris 9 and later). Otherwise just return system wide loadavg. 5787 int os::loadavg(double loadavg[], int nelem) { 5788 if (pset_getloadavg_ptr != NULL) { 5789 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5790 } else { 5791 return ::getloadavg(loadavg, nelem); 5792 } 5793 } 5794 5795 //--------------------------------------------------------------------------------- 5796 5797 static address same_page(address x, address y) { 5798 intptr_t page_bits = -os::vm_page_size(); 5799 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5800 return x; 5801 else if (x > y) 5802 return (address)(intptr_t(y) | ~page_bits) + 1; 5803 else 5804 return (address)(intptr_t(y) & page_bits); 5805 } 5806 5807 bool os::find(address addr, outputStream* st) { 5808 Dl_info dlinfo; 5809 memset(&dlinfo, 0, sizeof(dlinfo)); 5810 if (dladdr(addr, &dlinfo)) { 5811 #ifdef _LP64 5812 st->print("0x%016lx: ", addr); 5813 #else 5814 st->print("0x%08x: ", addr); 5815 #endif 5816 if (dlinfo.dli_sname != NULL) 5817 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5818 else if (dlinfo.dli_fname) 5819 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5820 else 5821 st->print("<absolute address>"); 5822 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5823 #ifdef _LP64 5824 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5825 #else 5826 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5827 #endif 5828 st->cr(); 5829 5830 if (Verbose) { 5831 // decode some bytes around the PC 5832 address begin = same_page(addr-40, addr); 5833 address end = same_page(addr+40, addr); 5834 address lowest = (address) dlinfo.dli_sname; 5835 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5836 if (begin < lowest) begin = lowest; 5837 Dl_info dlinfo2; 5838 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5839 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5840 end = (address) dlinfo2.dli_saddr; 5841 Disassembler::decode(begin, end, st); 5842 } 5843 return true; 5844 } 5845 return false; 5846 } 5847 5848 // Following function has been added to support HotSparc's libjvm.so running 5849 // under Solaris production JDK 1.2.2 / 1.3.0. These came from 5850 // src/solaris/hpi/native_threads in the EVM codebase. 5851 // 5852 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5853 // libraries and should thus be removed. We will leave it behind for a while 5854 // until we no longer want to able to run on top of 1.3.0 Solaris production 5855 // JDK. See 4341971. 5856 5857 #define STACK_SLACK 0x800 5858 5859 extern "C" { 5860 intptr_t sysThreadAvailableStackWithSlack() { 5861 stack_t st; 5862 intptr_t retval, stack_top; 5863 retval = thr_stksegment(&st); 5864 assert(retval == 0, "incorrect return value from thr_stksegment"); 5865 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5866 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5867 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5868 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5869 } 5870 } 5871 5872 // ObjectMonitor park-unpark infrastructure ... 5873 // 5874 // We implement Solaris and Linux PlatformEvents with the 5875 // obvious condvar-mutex-flag triple. 5876 // Another alternative that works quite well is pipes: 5877 // Each PlatformEvent consists of a pipe-pair. 5878 // The thread associated with the PlatformEvent 5879 // calls park(), which reads from the input end of the pipe. 5880 // Unpark() writes into the other end of the pipe. 5881 // The write-side of the pipe must be set NDELAY. 5882 // Unfortunately pipes consume a large # of handles. 5883 // Native solaris lwp_park() and lwp_unpark() work nicely, too. 5884 // Using pipes for the 1st few threads might be workable, however. 5885 // 5886 // park() is permitted to return spuriously. 5887 // Callers of park() should wrap the call to park() in 5888 // an appropriate loop. A litmus test for the correct 5889 // usage of park is the following: if park() were modified 5890 // to immediately return 0 your code should still work, 5891 // albeit degenerating to a spin loop. 5892 // 5893 // An interesting optimization for park() is to use a trylock() 5894 // to attempt to acquire the mutex. If the trylock() fails 5895 // then we know that a concurrent unpark() operation is in-progress. 5896 // in that case the park() code could simply set _count to 0 5897 // and return immediately. The subsequent park() operation *might* 5898 // return immediately. That's harmless as the caller of park() is 5899 // expected to loop. By using trylock() we will have avoided a 5900 // avoided a context switch caused by contention on the per-thread mutex. 5901 // 5902 // TODO-FIXME: 5903 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5904 // objectmonitor implementation. 5905 // 2. Collapse the JSR166 parker event, and the 5906 // objectmonitor ParkEvent into a single "Event" construct. 5907 // 3. In park() and unpark() add: 5908 // assert (Thread::current() == AssociatedWith). 5909 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5910 // 1-out-of-N park() operations will return immediately. 5911 // 5912 // _Event transitions in park() 5913 // -1 => -1 : illegal 5914 // 1 => 0 : pass - return immediately 5915 // 0 => -1 : block 5916 // 5917 // _Event serves as a restricted-range semaphore. 5918 // 5919 // Another possible encoding of _Event would be with 5920 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5921 // 5922 // TODO-FIXME: add DTRACE probes for: 5923 // 1. Tx parks 5924 // 2. Ty unparks Tx 5925 // 3. Tx resumes from park 5926 5927 5928 // value determined through experimentation 5929 #define ROUNDINGFIX 11 5930 5931 // utility to compute the abstime argument to timedwait. 5932 // TODO-FIXME: switch from compute_abstime() to unpackTime(). 5933 5934 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5935 // millis is the relative timeout time 5936 // abstime will be the absolute timeout time 5937 if (millis < 0) millis = 0; 5938 struct timeval now; 5939 int status = gettimeofday(&now, NULL); 5940 assert(status == 0, "gettimeofday"); 5941 jlong seconds = millis / 1000; 5942 jlong max_wait_period; 5943 5944 if (UseLWPSynchronization) { 5945 // forward port of fix for 4275818 (not sleeping long enough) 5946 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5947 // _lwp_cond_timedwait() used a round_down algorithm rather 5948 // than a round_up. For millis less than our roundfactor 5949 // it rounded down to 0 which doesn't meet the spec. 5950 // For millis > roundfactor we may return a bit sooner, but 5951 // since we can not accurately identify the patch level and 5952 // this has already been fixed in Solaris 9 and 8 we will 5953 // leave it alone rather than always rounding down. 5954 5955 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5956 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5957 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5958 max_wait_period = 21000000; 5959 } else { 5960 max_wait_period = 50000000; 5961 } 5962 millis %= 1000; 5963 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5964 seconds = max_wait_period; 5965 } 5966 abstime->tv_sec = now.tv_sec + seconds; 5967 long usec = now.tv_usec + millis * 1000; 5968 if (usec >= 1000000) { 5969 abstime->tv_sec += 1; 5970 usec -= 1000000; 5971 } 5972 abstime->tv_nsec = usec * 1000; 5973 return abstime; 5974 } 5975 5976 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5977 // Conceptually TryPark() should be equivalent to park(0). 5978 5979 int os::PlatformEvent::TryPark() { 5980 for (;;) { 5981 const int v = _Event ; 5982 guarantee ((v == 0) || (v == 1), "invariant") ; 5983 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5984 } 5985 } 5986 5987 void os::PlatformEvent::park() { // AKA: down() 5988 // Invariant: Only the thread associated with the Event/PlatformEvent 5989 // may call park(). 5990 int v ; 5991 for (;;) { 5992 v = _Event ; 5993 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5994 } 5995 guarantee (v >= 0, "invariant") ; 5996 if (v == 0) { 5997 // Do this the hard way by blocking ... 5998 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5999 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6000 // Only for SPARC >= V8PlusA 6001 #if defined(__sparc) && defined(COMPILER2) 6002 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6003 #endif 6004 int status = os::Solaris::mutex_lock(_mutex); 6005 assert_status(status == 0, status, "mutex_lock"); 6006 guarantee (_nParked == 0, "invariant") ; 6007 ++ _nParked ; 6008 while (_Event < 0) { 6009 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 6010 // Treat this the same as if the wait was interrupted 6011 // With usr/lib/lwp going to kernel, always handle ETIME 6012 status = os::Solaris::cond_wait(_cond, _mutex); 6013 if (status == ETIME) status = EINTR ; 6014 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 6015 } 6016 -- _nParked ; 6017 _Event = 0 ; 6018 status = os::Solaris::mutex_unlock(_mutex); 6019 assert_status(status == 0, status, "mutex_unlock"); 6020 } 6021 } 6022 6023 int os::PlatformEvent::park(jlong millis) { 6024 guarantee (_nParked == 0, "invariant") ; 6025 int v ; 6026 for (;;) { 6027 v = _Event ; 6028 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 6029 } 6030 guarantee (v >= 0, "invariant") ; 6031 if (v != 0) return OS_OK ; 6032 6033 int ret = OS_TIMEOUT; 6034 timestruc_t abst; 6035 compute_abstime (&abst, millis); 6036 6037 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6038 // For Solaris SPARC set fprs.FEF=0 prior to parking. 6039 // Only for SPARC >= V8PlusA 6040 #if defined(__sparc) && defined(COMPILER2) 6041 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6042 #endif 6043 int status = os::Solaris::mutex_lock(_mutex); 6044 assert_status(status == 0, status, "mutex_lock"); 6045 guarantee (_nParked == 0, "invariant") ; 6046 ++ _nParked ; 6047 while (_Event < 0) { 6048 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 6049 assert_status(status == 0 || status == EINTR || 6050 status == ETIME || status == ETIMEDOUT, 6051 status, "cond_timedwait"); 6052 if (!FilterSpuriousWakeups) break ; // previous semantics 6053 if (status == ETIME || status == ETIMEDOUT) break ; 6054 // We consume and ignore EINTR and spurious wakeups. 6055 } 6056 -- _nParked ; 6057 if (_Event >= 0) ret = OS_OK ; 6058 _Event = 0 ; 6059 status = os::Solaris::mutex_unlock(_mutex); 6060 assert_status(status == 0, status, "mutex_unlock"); 6061 return ret; 6062 } 6063 6064 void os::PlatformEvent::unpark() { 6065 int v, AnyWaiters; 6066 6067 // Increment _Event. 6068 // Another acceptable implementation would be to simply swap 1 6069 // into _Event: 6070 // if (Swap (&_Event, 1) < 0) { 6071 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 6072 // if (AnyWaiters) cond_signal (_cond) ; 6073 // } 6074 6075 for (;;) { 6076 v = _Event ; 6077 if (v > 0) { 6078 // The LD of _Event could have reordered or be satisfied 6079 // by a read-aside from this processor's write buffer. 6080 // To avoid problems execute a barrier and then 6081 // ratify the value. A degenerate CAS() would also work. 6082 // Viz., CAS (v+0, &_Event, v) == v). 6083 OrderAccess::fence() ; 6084 if (_Event == v) return ; 6085 continue ; 6086 } 6087 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 6088 } 6089 6090 // If the thread associated with the event was parked, wake it. 6091 if (v < 0) { 6092 int status ; 6093 // Wait for the thread assoc with the PlatformEvent to vacate. 6094 status = os::Solaris::mutex_lock(_mutex); 6095 assert_status(status == 0, status, "mutex_lock"); 6096 AnyWaiters = _nParked ; 6097 status = os::Solaris::mutex_unlock(_mutex); 6098 assert_status(status == 0, status, "mutex_unlock"); 6099 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 6100 if (AnyWaiters != 0) { 6101 // We intentional signal *after* dropping the lock 6102 // to avoid a common class of futile wakeups. 6103 status = os::Solaris::cond_signal(_cond); 6104 assert_status(status == 0, status, "cond_signal"); 6105 } 6106 } 6107 } 6108 6109 // JSR166 6110 // ------------------------------------------------------- 6111 6112 /* 6113 * The solaris and linux implementations of park/unpark are fairly 6114 * conservative for now, but can be improved. They currently use a 6115 * mutex/condvar pair, plus _counter. 6116 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6117 * sets count to 1 and signals condvar. Only one thread ever waits 6118 * on the condvar. Contention seen when trying to park implies that someone 6119 * is unparking you, so don't wait. And spurious returns are fine, so there 6120 * is no need to track notifications. 6121 */ 6122 6123 #define MAX_SECS 100000000 6124 /* 6125 * This code is common to linux and solaris and will be moved to a 6126 * common place in dolphin. 6127 * 6128 * The passed in time value is either a relative time in nanoseconds 6129 * or an absolute time in milliseconds. Either way it has to be unpacked 6130 * into suitable seconds and nanoseconds components and stored in the 6131 * given timespec structure. 6132 * Given time is a 64-bit value and the time_t used in the timespec is only 6133 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6134 * overflow if times way in the future are given. Further on Solaris versions 6135 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6136 * number of seconds, in abstime, is less than current_time + 100,000,000. 6137 * As it will be 28 years before "now + 100000000" will overflow we can 6138 * ignore overflow and just impose a hard-limit on seconds using the value 6139 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6140 * years from "now". 6141 */ 6142 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6143 assert (time > 0, "convertTime"); 6144 6145 struct timeval now; 6146 int status = gettimeofday(&now, NULL); 6147 assert(status == 0, "gettimeofday"); 6148 6149 time_t max_secs = now.tv_sec + MAX_SECS; 6150 6151 if (isAbsolute) { 6152 jlong secs = time / 1000; 6153 if (secs > max_secs) { 6154 absTime->tv_sec = max_secs; 6155 } 6156 else { 6157 absTime->tv_sec = secs; 6158 } 6159 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6160 } 6161 else { 6162 jlong secs = time / NANOSECS_PER_SEC; 6163 if (secs >= MAX_SECS) { 6164 absTime->tv_sec = max_secs; 6165 absTime->tv_nsec = 0; 6166 } 6167 else { 6168 absTime->tv_sec = now.tv_sec + secs; 6169 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6170 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6171 absTime->tv_nsec -= NANOSECS_PER_SEC; 6172 ++absTime->tv_sec; // note: this must be <= max_secs 6173 } 6174 } 6175 } 6176 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6177 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6178 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6179 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6180 } 6181 6182 void Parker::park(bool isAbsolute, jlong time) { 6183 6184 // Optional fast-path check: 6185 // Return immediately if a permit is available. 6186 if (_counter > 0) { 6187 _counter = 0 ; 6188 OrderAccess::fence(); 6189 return ; 6190 } 6191 6192 // Optional fast-exit: Check interrupt before trying to wait 6193 Thread* thread = Thread::current(); 6194 assert(thread->is_Java_thread(), "Must be JavaThread"); 6195 JavaThread *jt = (JavaThread *)thread; 6196 if (Thread::is_interrupted(thread, false)) { 6197 return; 6198 } 6199 6200 // First, demultiplex/decode time arguments 6201 timespec absTime; 6202 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6203 return; 6204 } 6205 if (time > 0) { 6206 // Warning: this code might be exposed to the old Solaris time 6207 // round-down bugs. Grep "roundingFix" for details. 6208 unpackTime(&absTime, isAbsolute, time); 6209 } 6210 6211 // Enter safepoint region 6212 // Beware of deadlocks such as 6317397. 6213 // The per-thread Parker:: _mutex is a classic leaf-lock. 6214 // In particular a thread must never block on the Threads_lock while 6215 // holding the Parker:: mutex. If safepoints are pending both the 6216 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6217 ThreadBlockInVM tbivm(jt); 6218 6219 // Don't wait if cannot get lock since interference arises from 6220 // unblocking. Also. check interrupt before trying wait 6221 if (Thread::is_interrupted(thread, false) || 6222 os::Solaris::mutex_trylock(_mutex) != 0) { 6223 return; 6224 } 6225 6226 int status ; 6227 6228 if (_counter > 0) { // no wait needed 6229 _counter = 0; 6230 status = os::Solaris::mutex_unlock(_mutex); 6231 assert (status == 0, "invariant") ; 6232 OrderAccess::fence(); 6233 return; 6234 } 6235 6236 #ifdef ASSERT 6237 // Don't catch signals while blocked; let the running threads have the signals. 6238 // (This allows a debugger to break into the running thread.) 6239 sigset_t oldsigs; 6240 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6241 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6242 #endif 6243 6244 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6245 jt->set_suspend_equivalent(); 6246 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6247 6248 // Do this the hard way by blocking ... 6249 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6250 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6251 // Only for SPARC >= V8PlusA 6252 #if defined(__sparc) && defined(COMPILER2) 6253 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6254 #endif 6255 6256 if (time == 0) { 6257 status = os::Solaris::cond_wait (_cond, _mutex) ; 6258 } else { 6259 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6260 } 6261 // Note that an untimed cond_wait() can sometimes return ETIME on older 6262 // versions of the Solaris. 6263 assert_status(status == 0 || status == EINTR || 6264 status == ETIME || status == ETIMEDOUT, 6265 status, "cond_timedwait"); 6266 6267 #ifdef ASSERT 6268 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6269 #endif 6270 _counter = 0 ; 6271 status = os::Solaris::mutex_unlock(_mutex); 6272 assert_status(status == 0, status, "mutex_unlock") ; 6273 6274 // If externally suspended while waiting, re-suspend 6275 if (jt->handle_special_suspend_equivalent_condition()) { 6276 jt->java_suspend_self(); 6277 } 6278 OrderAccess::fence(); 6279 } 6280 6281 void Parker::unpark() { 6282 int s, status ; 6283 status = os::Solaris::mutex_lock (_mutex) ; 6284 assert (status == 0, "invariant") ; 6285 s = _counter; 6286 _counter = 1; 6287 status = os::Solaris::mutex_unlock (_mutex) ; 6288 assert (status == 0, "invariant") ; 6289 6290 if (s < 1) { 6291 status = os::Solaris::cond_signal (_cond) ; 6292 assert (status == 0, "invariant") ; 6293 } 6294 } 6295 6296 extern char** environ; 6297 6298 // Run the specified command in a separate process. Return its exit value, 6299 // or -1 on failure (e.g. can't fork a new process). 6300 // Unlike system(), this function can be called from signal handler. It 6301 // doesn't block SIGINT et al. 6302 int os::fork_and_exec(char* cmd) { 6303 char * argv[4]; 6304 argv[0] = (char *)"sh"; 6305 argv[1] = (char *)"-c"; 6306 argv[2] = cmd; 6307 argv[3] = NULL; 6308 6309 // fork is async-safe, fork1 is not so can't use in signal handler 6310 pid_t pid; 6311 Thread* t = ThreadLocalStorage::get_thread_slow(); 6312 if (t != NULL && t->is_inside_signal_handler()) { 6313 pid = fork(); 6314 } else { 6315 pid = fork1(); 6316 } 6317 6318 if (pid < 0) { 6319 // fork failed 6320 warning("fork failed: %s", strerror(errno)); 6321 return -1; 6322 6323 } else if (pid == 0) { 6324 // child process 6325 6326 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6327 execve("/usr/bin/sh", argv, environ); 6328 6329 // execve failed 6330 _exit(-1); 6331 6332 } else { 6333 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6334 // care about the actual exit code, for now. 6335 6336 int status; 6337 6338 // Wait for the child process to exit. This returns immediately if 6339 // the child has already exited. */ 6340 while (waitpid(pid, &status, 0) < 0) { 6341 switch (errno) { 6342 case ECHILD: return 0; 6343 case EINTR: break; 6344 default: return -1; 6345 } 6346 } 6347 6348 if (WIFEXITED(status)) { 6349 // The child exited normally; get its exit code. 6350 return WEXITSTATUS(status); 6351 } else if (WIFSIGNALED(status)) { 6352 // The child exited because of a signal 6353 // The best value to return is 0x80 + signal number, 6354 // because that is what all Unix shells do, and because 6355 // it allows callers to distinguish between process exit and 6356 // process death by signal. 6357 return 0x80 + WTERMSIG(status); 6358 } else { 6359 // Unknown exit code; pass it through 6360 return status; 6361 } 6362 } 6363 } 6364 6365 // is_headless_jre() 6366 // 6367 // Test for the existence of xawt/libmawt.so or libawt_xawt.so 6368 // in order to report if we are running in a headless jre 6369 // 6370 // Since JDK8 xawt/libmawt.so was moved into the same directory 6371 // as libawt.so, and renamed libawt_xawt.so 6372 // 6373 bool os::is_headless_jre() { 6374 struct stat statbuf; 6375 char buf[MAXPATHLEN]; 6376 char libmawtpath[MAXPATHLEN]; 6377 const char *xawtstr = "/xawt/libmawt.so"; 6378 const char *new_xawtstr = "/libawt_xawt.so"; 6379 char *p; 6380 6381 // Get path to libjvm.so 6382 os::jvm_path(buf, sizeof(buf)); 6383 6384 // Get rid of libjvm.so 6385 p = strrchr(buf, '/'); 6386 if (p == NULL) return false; 6387 else *p = '\0'; 6388 6389 // Get rid of client or server 6390 p = strrchr(buf, '/'); 6391 if (p == NULL) return false; 6392 else *p = '\0'; 6393 6394 // check xawt/libmawt.so 6395 strcpy(libmawtpath, buf); 6396 strcat(libmawtpath, xawtstr); 6397 if (::stat(libmawtpath, &statbuf) == 0) return false; 6398 6399 // check libawt_xawt.so 6400 strcpy(libmawtpath, buf); 6401 strcat(libmawtpath, new_xawtstr); 6402 if (::stat(libmawtpath, &statbuf) == 0) return false; 6403 6404 return true; 6405 } 6406 6407 size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6408 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6409 } 6410 6411 int os::close(int fd) { 6412 RESTARTABLE_RETURN_INT(::close(fd)); 6413 } 6414 6415 int os::socket_close(int fd) { 6416 RESTARTABLE_RETURN_INT(::close(fd)); 6417 } 6418 6419 int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 6420 INTERRUPTIBLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6421 } 6422 6423 int os::send(int fd, char* buf, size_t nBytes, uint flags) { 6424 INTERRUPTIBLE_RETURN_INT((int)::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6425 } 6426 6427 int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 6428 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 6429 } 6430 6431 // As both poll and select can be interrupted by signals, we have to be 6432 // prepared to restart the system call after updating the timeout, unless 6433 // a poll() is done with timeout == -1, in which case we repeat with this 6434 // "wait forever" value. 6435 6436 int os::timeout(int fd, long timeout) { 6437 int res; 6438 struct timeval t; 6439 julong prevtime, newtime; 6440 static const char* aNull = 0; 6441 struct pollfd pfd; 6442 pfd.fd = fd; 6443 pfd.events = POLLIN; 6444 6445 gettimeofday(&t, &aNull); 6446 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6447 6448 for(;;) { 6449 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6450 if(res == OS_ERR && errno == EINTR) { 6451 if(timeout != -1) { 6452 gettimeofday(&t, &aNull); 6453 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6454 timeout -= newtime - prevtime; 6455 if(timeout <= 0) 6456 return OS_OK; 6457 prevtime = newtime; 6458 } 6459 } else return res; 6460 } 6461 } 6462 6463 int os::connect(int fd, struct sockaddr *him, socklen_t len) { 6464 int _result; 6465 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result,\ 6466 os::Solaris::clear_interrupted); 6467 6468 // Depending on when thread interruption is reset, _result could be 6469 // one of two values when errno == EINTR 6470 6471 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6472 && (errno == EINTR)) { 6473 /* restarting a connect() changes its errno semantics */ 6474 INTERRUPTIBLE(::connect(fd, him, len), _result,\ 6475 os::Solaris::clear_interrupted); 6476 /* undo these changes */ 6477 if (_result == OS_ERR) { 6478 if (errno == EALREADY) { 6479 errno = EINPROGRESS; /* fall through */ 6480 } else if (errno == EISCONN) { 6481 errno = 0; 6482 return OS_OK; 6483 } 6484 } 6485 } 6486 return _result; 6487 } 6488 6489 int os::accept(int fd, struct sockaddr* him, socklen_t* len) { 6490 if (fd < 0) { 6491 return OS_ERR; 6492 } 6493 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him, len),\ 6494 os::Solaris::clear_interrupted); 6495 } 6496 6497 int os::recvfrom(int fd, char* buf, size_t nBytes, uint flags, 6498 sockaddr* from, socklen_t* fromlen) { 6499 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes, flags, from, fromlen),\ 6500 os::Solaris::clear_interrupted); 6501 } 6502 6503 int os::sendto(int fd, char* buf, size_t len, uint flags, 6504 struct sockaddr* to, socklen_t tolen) { 6505 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags, to, tolen),\ 6506 os::Solaris::clear_interrupted); 6507 } 6508 6509 int os::socket_available(int fd, jint *pbytes) { 6510 if (fd < 0) { 6511 return OS_OK; 6512 } 6513 int ret; 6514 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6515 // note: ioctl can return 0 when successful, JVM_SocketAvailable 6516 // is expected to return 0 on failure and 1 on success to the jdk. 6517 return (ret == OS_ERR) ? 0 : 1; 6518 } 6519 6520 int os::bind(int fd, struct sockaddr* him, socklen_t len) { 6521 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6522 os::Solaris::clear_interrupted); 6523 } 6524 6525 // Get the default path to the core file 6526 // Returns the length of the string 6527 int os::get_core_path(char* buffer, size_t bufferSize) { 6528 const char* p = get_current_directory(buffer, bufferSize); 6529 6530 if (p == NULL) { 6531 assert(p != NULL, "failed to get current directory"); 6532 return 0; 6533 } 6534 6535 return strlen(buffer); 6536 }