1 /* 2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 // no precompiled headers 26 #include "classfile/classLoader.hpp" 27 #include "classfile/systemDictionary.hpp" 28 #include "classfile/vmSymbols.hpp" 29 #include "code/icBuffer.hpp" 30 #include "code/vtableStubs.hpp" 31 #include "compiler/compileBroker.hpp" 32 #include "interpreter/interpreter.hpp" 33 #include "jvm_solaris.h" 34 #include "memory/allocation.inline.hpp" 35 #include "memory/filemap.hpp" 36 #include "mutex_solaris.inline.hpp" 37 #include "oops/oop.inline.hpp" 38 #include "os_share_solaris.hpp" 39 #include "prims/jniFastGetField.hpp" 40 #include "prims/jvm.h" 41 #include "prims/jvm_misc.hpp" 42 #include "runtime/arguments.hpp" 43 #include "runtime/extendedPC.hpp" 44 #include "runtime/globals.hpp" 45 #include "runtime/interfaceSupport.hpp" 46 #include "runtime/java.hpp" 47 #include "runtime/javaCalls.hpp" 48 #include "runtime/mutexLocker.hpp" 49 #include "runtime/objectMonitor.hpp" 50 #include "runtime/osThread.hpp" 51 #include "runtime/perfMemory.hpp" 52 #include "runtime/sharedRuntime.hpp" 53 #include "runtime/statSampler.hpp" 54 #include "runtime/stubRoutines.hpp" 55 #include "runtime/threadCritical.hpp" 56 #include "runtime/timer.hpp" 57 #include "services/attachListener.hpp" 58 #include "services/runtimeService.hpp" 59 #include "thread_solaris.inline.hpp" 60 #include "utilities/decoder.hpp" 61 #include "utilities/defaultStream.hpp" 62 #include "utilities/events.hpp" 63 #include "utilities/growableArray.hpp" 64 #include "utilities/vmError.hpp" 65 #ifdef TARGET_ARCH_x86 66 # include "assembler_x86.inline.hpp" 67 # include "nativeInst_x86.hpp" 68 #endif 69 #ifdef TARGET_ARCH_sparc 70 # include "assembler_sparc.inline.hpp" 71 # include "nativeInst_sparc.hpp" 72 #endif 73 #ifdef COMPILER1 74 #include "c1/c1_Runtime1.hpp" 75 #endif 76 #ifdef COMPILER2 77 #include "opto/runtime.hpp" 78 #endif 79 80 // put OS-includes here 81 # include <dlfcn.h> 82 # include <errno.h> 83 # include <exception> 84 # include <link.h> 85 # include <poll.h> 86 # include <pthread.h> 87 # include <pwd.h> 88 # include <schedctl.h> 89 # include <setjmp.h> 90 # include <signal.h> 91 # include <stdio.h> 92 # include <alloca.h> 93 # include <sys/filio.h> 94 # include <sys/ipc.h> 95 # include <sys/lwp.h> 96 # include <sys/machelf.h> // for elf Sym structure used by dladdr1 97 # include <sys/mman.h> 98 # include <sys/processor.h> 99 # include <sys/procset.h> 100 # include <sys/pset.h> 101 # include <sys/resource.h> 102 # include <sys/shm.h> 103 # include <sys/socket.h> 104 # include <sys/stat.h> 105 # include <sys/systeminfo.h> 106 # include <sys/time.h> 107 # include <sys/times.h> 108 # include <sys/types.h> 109 # include <sys/wait.h> 110 # include <sys/utsname.h> 111 # include <thread.h> 112 # include <unistd.h> 113 # include <sys/priocntl.h> 114 # include <sys/rtpriocntl.h> 115 # include <sys/tspriocntl.h> 116 # include <sys/iapriocntl.h> 117 # include <sys/loadavg.h> 118 # include <string.h> 119 # include <stdio.h> 120 121 # define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 122 # include <sys/procfs.h> // see comment in <sys/procfs.h> 123 124 #define MAX_PATH (2 * K) 125 126 // for timer info max values which include all bits 127 #define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 128 129 #ifdef _GNU_SOURCE 130 // See bug #6514594 131 extern "C" int madvise(caddr_t, size_t, int); 132 extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 133 int attr, int mask); 134 #endif //_GNU_SOURCE 135 136 /* 137 MPSS Changes Start. 138 The JVM binary needs to be built and run on pre-Solaris 9 139 systems, but the constants needed by MPSS are only in Solaris 9 140 header files. They are textually replicated here to allow 141 building on earlier systems. Once building on Solaris 8 is 142 no longer a requirement, these #defines can be replaced by ordinary 143 system .h inclusion. 144 145 In earlier versions of the JDK and Solaris, we used ISM for large pages. 146 But ISM requires shared memory to achieve this and thus has many caveats. 147 MPSS is a fully transparent and is a cleaner way to get large pages. 148 Although we still require keeping ISM for backward compatiblitiy as well as 149 giving the opportunity to use large pages on older systems it is 150 recommended that MPSS be used for Solaris 9 and above. 151 152 */ 153 154 #ifndef MC_HAT_ADVISE 155 156 struct memcntl_mha { 157 uint_t mha_cmd; /* command(s) */ 158 uint_t mha_flags; 159 size_t mha_pagesize; 160 }; 161 #define MC_HAT_ADVISE 7 /* advise hat map size */ 162 #define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 163 #define MAP_ALIGN 0x200 /* addr specifies alignment */ 164 165 #endif 166 // MPSS Changes End. 167 168 169 // Here are some liblgrp types from sys/lgrp_user.h to be able to 170 // compile on older systems without this header file. 171 172 #ifndef MADV_ACCESS_LWP 173 # define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 174 #endif 175 #ifndef MADV_ACCESS_MANY 176 # define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 177 #endif 178 179 #ifndef LGRP_RSRC_CPU 180 # define LGRP_RSRC_CPU 0 /* CPU resources */ 181 #endif 182 #ifndef LGRP_RSRC_MEM 183 # define LGRP_RSRC_MEM 1 /* memory resources */ 184 #endif 185 186 // Some more macros from sys/mman.h that are not present in Solaris 8. 187 188 #ifndef MAX_MEMINFO_CNT 189 /* 190 * info_req request type definitions for meminfo 191 * request types starting with MEMINFO_V are used for Virtual addresses 192 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 193 * addresses 194 */ 195 # define MEMINFO_SHIFT 16 196 # define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 197 # define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 198 # define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 199 # define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 200 # define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 201 # define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 202 # define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 203 # define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 204 205 /* maximum number of addresses meminfo() can process at a time */ 206 # define MAX_MEMINFO_CNT 256 207 208 /* maximum number of request types */ 209 # define MAX_MEMINFO_REQ 31 210 #endif 211 212 // see thr_setprio(3T) for the basis of these numbers 213 #define MinimumPriority 0 214 #define NormalPriority 64 215 #define MaximumPriority 127 216 217 // Values for ThreadPriorityPolicy == 1 218 int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 219 80, 96, 112, 124, 127 }; 220 221 // System parameters used internally 222 static clock_t clock_tics_per_sec = 100; 223 224 // Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 225 static bool enabled_extended_FILE_stdio = false; 226 227 // For diagnostics to print a message once. see run_periodic_checks 228 static bool check_addr0_done = false; 229 static sigset_t check_signal_done; 230 static bool check_signals = true; 231 232 address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 233 address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 234 235 address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 236 237 238 // "default" initializers for missing libc APIs 239 extern "C" { 240 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 241 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 242 243 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 244 static int lwp_cond_destroy(cond_t *cv) { return 0; } 245 } 246 247 // "default" initializers for pthread-based synchronization 248 extern "C" { 249 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 250 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 251 } 252 253 // Thread Local Storage 254 // This is common to all Solaris platforms so it is defined here, 255 // in this common file. 256 // The declarations are in the os_cpu threadLS*.hpp files. 257 // 258 // Static member initialization for TLS 259 Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 260 261 #ifndef PRODUCT 262 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 263 264 int ThreadLocalStorage::_tcacheHit = 0; 265 int ThreadLocalStorage::_tcacheMiss = 0; 266 267 void ThreadLocalStorage::print_statistics() { 268 int total = _tcacheMiss+_tcacheHit; 269 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 270 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 271 } 272 #undef _PCT 273 #endif // PRODUCT 274 275 Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 276 int index) { 277 Thread *thread = get_thread_slow(); 278 if (thread != NULL) { 279 address sp = os::current_stack_pointer(); 280 guarantee(thread->_stack_base == NULL || 281 (sp <= thread->_stack_base && 282 sp >= thread->_stack_base - thread->_stack_size) || 283 is_error_reported(), 284 "sp must be inside of selected thread stack"); 285 286 thread->set_self_raw_id(raw_id); // mark for quick retrieval 287 _get_thread_cache[ index ] = thread; 288 } 289 return thread; 290 } 291 292 293 static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 294 #define NO_CACHED_THREAD ((Thread*)all_zero) 295 296 void ThreadLocalStorage::pd_set_thread(Thread* thread) { 297 298 // Store the new value before updating the cache to prevent a race 299 // between get_thread_via_cache_slowly() and this store operation. 300 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 301 302 // Update thread cache with new thread if setting on thread create, 303 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 304 uintptr_t raw = pd_raw_thread_id(); 305 int ix = pd_cache_index(raw); 306 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 307 } 308 309 void ThreadLocalStorage::pd_init() { 310 for (int i = 0; i < _pd_cache_size; i++) { 311 _get_thread_cache[i] = NO_CACHED_THREAD; 312 } 313 } 314 315 // Invalidate all the caches (happens to be the same as pd_init). 316 void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 317 318 #undef NO_CACHED_THREAD 319 320 // END Thread Local Storage 321 322 static inline size_t adjust_stack_size(address base, size_t size) { 323 if ((ssize_t)size < 0) { 324 // 4759953: Compensate for ridiculous stack size. 325 size = max_intx; 326 } 327 if (size > (size_t)base) { 328 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 329 size = (size_t)base; 330 } 331 return size; 332 } 333 334 static inline stack_t get_stack_info() { 335 stack_t st; 336 int retval = thr_stksegment(&st); 337 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 338 assert(retval == 0, "incorrect return value from thr_stksegment"); 339 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 340 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 341 return st; 342 } 343 344 address os::current_stack_base() { 345 int r = thr_main() ; 346 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 347 bool is_primordial_thread = r; 348 349 // Workaround 4352906, avoid calls to thr_stksegment by 350 // thr_main after the first one (it looks like we trash 351 // some data, causing the value for ss_sp to be incorrect). 352 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 353 stack_t st = get_stack_info(); 354 if (is_primordial_thread) { 355 // cache initial value of stack base 356 os::Solaris::_main_stack_base = (address)st.ss_sp; 357 } 358 return (address)st.ss_sp; 359 } else { 360 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 361 return os::Solaris::_main_stack_base; 362 } 363 } 364 365 size_t os::current_stack_size() { 366 size_t size; 367 368 int r = thr_main() ; 369 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 370 if(!r) { 371 size = get_stack_info().ss_size; 372 } else { 373 struct rlimit limits; 374 getrlimit(RLIMIT_STACK, &limits); 375 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 376 } 377 // base may not be page aligned 378 address base = current_stack_base(); 379 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 380 return (size_t)(base - bottom); 381 } 382 383 struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 384 return localtime_r(clock, res); 385 } 386 387 // interruptible infrastructure 388 389 // setup_interruptible saves the thread state before going into an 390 // interruptible system call. 391 // The saved state is used to restore the thread to 392 // its former state whether or not an interrupt is received. 393 // Used by classloader os::read 394 // os::restartable_read calls skip this layer and stay in _thread_in_native 395 396 void os::Solaris::setup_interruptible(JavaThread* thread) { 397 398 JavaThreadState thread_state = thread->thread_state(); 399 400 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 401 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 402 OSThread* osthread = thread->osthread(); 403 osthread->set_saved_interrupt_thread_state(thread_state); 404 thread->frame_anchor()->make_walkable(thread); 405 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 406 } 407 408 // Version of setup_interruptible() for threads that are already in 409 // _thread_blocked. Used by os_sleep(). 410 void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 411 thread->frame_anchor()->make_walkable(thread); 412 } 413 414 JavaThread* os::Solaris::setup_interruptible() { 415 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 416 setup_interruptible(thread); 417 return thread; 418 } 419 420 void os::Solaris::try_enable_extended_io() { 421 typedef int (*enable_extended_FILE_stdio_t)(int, int); 422 423 if (!UseExtendedFileIO) { 424 return; 425 } 426 427 enable_extended_FILE_stdio_t enabler = 428 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 429 "enable_extended_FILE_stdio"); 430 if (enabler) { 431 enabler(-1, -1); 432 } 433 } 434 435 436 #ifdef ASSERT 437 438 JavaThread* os::Solaris::setup_interruptible_native() { 439 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 440 JavaThreadState thread_state = thread->thread_state(); 441 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 442 return thread; 443 } 444 445 void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 446 JavaThreadState thread_state = thread->thread_state(); 447 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 448 } 449 #endif 450 451 // cleanup_interruptible reverses the effects of setup_interruptible 452 // setup_interruptible_already_blocked() does not need any cleanup. 453 454 void os::Solaris::cleanup_interruptible(JavaThread* thread) { 455 OSThread* osthread = thread->osthread(); 456 457 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 458 } 459 460 // I/O interruption related counters called in _INTERRUPTIBLE 461 462 void os::Solaris::bump_interrupted_before_count() { 463 RuntimeService::record_interrupted_before_count(); 464 } 465 466 void os::Solaris::bump_interrupted_during_count() { 467 RuntimeService::record_interrupted_during_count(); 468 } 469 470 static int _processors_online = 0; 471 472 jint os::Solaris::_os_thread_limit = 0; 473 volatile jint os::Solaris::_os_thread_count = 0; 474 475 julong os::available_memory() { 476 return Solaris::available_memory(); 477 } 478 479 julong os::Solaris::available_memory() { 480 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 481 } 482 483 julong os::Solaris::_physical_memory = 0; 484 485 julong os::physical_memory() { 486 return Solaris::physical_memory(); 487 } 488 489 julong os::allocatable_physical_memory(julong size) { 490 #ifdef _LP64 491 return size; 492 #else 493 julong result = MIN2(size, (julong)3835*M); 494 if (!is_allocatable(result)) { 495 // Memory allocations will be aligned but the alignment 496 // is not known at this point. Alignments will 497 // be at most to LargePageSizeInBytes. Protect 498 // allocations from alignments up to illegal 499 // values. If at this point 2G is illegal. 500 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 501 result = MIN2(size, reasonable_size); 502 } 503 return result; 504 #endif 505 } 506 507 static hrtime_t first_hrtime = 0; 508 static const hrtime_t hrtime_hz = 1000*1000*1000; 509 const int LOCK_BUSY = 1; 510 const int LOCK_FREE = 0; 511 const int LOCK_INVALID = -1; 512 static volatile hrtime_t max_hrtime = 0; 513 static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 514 515 516 void os::Solaris::initialize_system_info() { 517 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 518 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 519 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 520 } 521 522 int os::active_processor_count() { 523 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 524 pid_t pid = getpid(); 525 psetid_t pset = PS_NONE; 526 // Are we running in a processor set or is there any processor set around? 527 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 528 uint_t pset_cpus; 529 // Query the number of cpus available to us. 530 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 531 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 532 _processors_online = pset_cpus; 533 return pset_cpus; 534 } 535 } 536 // Otherwise return number of online cpus 537 return online_cpus; 538 } 539 540 static bool find_processors_in_pset(psetid_t pset, 541 processorid_t** id_array, 542 uint_t* id_length) { 543 bool result = false; 544 // Find the number of processors in the processor set. 545 if (pset_info(pset, NULL, id_length, NULL) == 0) { 546 // Make up an array to hold their ids. 547 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 548 // Fill in the array with their processor ids. 549 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 550 result = true; 551 } 552 } 553 return result; 554 } 555 556 // Callers of find_processors_online() must tolerate imprecise results -- 557 // the system configuration can change asynchronously because of DR 558 // or explicit psradm operations. 559 // 560 // We also need to take care that the loop (below) terminates as the 561 // number of processors online can change between the _SC_NPROCESSORS_ONLN 562 // request and the loop that builds the list of processor ids. Unfortunately 563 // there's no reliable way to determine the maximum valid processor id, 564 // so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 565 // man pages, which claim the processor id set is "sparse, but 566 // not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 567 // exit the loop. 568 // 569 // In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 570 // not available on S8.0. 571 572 static bool find_processors_online(processorid_t** id_array, 573 uint* id_length) { 574 const processorid_t MAX_PROCESSOR_ID = 100000 ; 575 // Find the number of processors online. 576 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 577 // Make up an array to hold their ids. 578 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 579 // Processors need not be numbered consecutively. 580 long found = 0; 581 processorid_t next = 0; 582 while (found < *id_length && next < MAX_PROCESSOR_ID) { 583 processor_info_t info; 584 if (processor_info(next, &info) == 0) { 585 // NB, PI_NOINTR processors are effectively online ... 586 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 587 (*id_array)[found] = next; 588 found += 1; 589 } 590 } 591 next += 1; 592 } 593 if (found < *id_length) { 594 // The loop above didn't identify the expected number of processors. 595 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 596 // and re-running the loop, above, but there's no guarantee of progress 597 // if the system configuration is in flux. Instead, we just return what 598 // we've got. Note that in the worst case find_processors_online() could 599 // return an empty set. (As a fall-back in the case of the empty set we 600 // could just return the ID of the current processor). 601 *id_length = found ; 602 } 603 604 return true; 605 } 606 607 static bool assign_distribution(processorid_t* id_array, 608 uint id_length, 609 uint* distribution, 610 uint distribution_length) { 611 // We assume we can assign processorid_t's to uint's. 612 assert(sizeof(processorid_t) == sizeof(uint), 613 "can't convert processorid_t to uint"); 614 // Quick check to see if we won't succeed. 615 if (id_length < distribution_length) { 616 return false; 617 } 618 // Assign processor ids to the distribution. 619 // Try to shuffle processors to distribute work across boards, 620 // assuming 4 processors per board. 621 const uint processors_per_board = ProcessDistributionStride; 622 // Find the maximum processor id. 623 processorid_t max_id = 0; 624 for (uint m = 0; m < id_length; m += 1) { 625 max_id = MAX2(max_id, id_array[m]); 626 } 627 // The next id, to limit loops. 628 const processorid_t limit_id = max_id + 1; 629 // Make up markers for available processors. 630 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 631 for (uint c = 0; c < limit_id; c += 1) { 632 available_id[c] = false; 633 } 634 for (uint a = 0; a < id_length; a += 1) { 635 available_id[id_array[a]] = true; 636 } 637 // Step by "boards", then by "slot", copying to "assigned". 638 // NEEDS_CLEANUP: The assignment of processors should be stateful, 639 // remembering which processors have been assigned by 640 // previous calls, etc., so as to distribute several 641 // independent calls of this method. What we'd like is 642 // It would be nice to have an API that let us ask 643 // how many processes are bound to a processor, 644 // but we don't have that, either. 645 // In the short term, "board" is static so that 646 // subsequent distributions don't all start at board 0. 647 static uint board = 0; 648 uint assigned = 0; 649 // Until we've found enough processors .... 650 while (assigned < distribution_length) { 651 // ... find the next available processor in the board. 652 for (uint slot = 0; slot < processors_per_board; slot += 1) { 653 uint try_id = board * processors_per_board + slot; 654 if ((try_id < limit_id) && (available_id[try_id] == true)) { 655 distribution[assigned] = try_id; 656 available_id[try_id] = false; 657 assigned += 1; 658 break; 659 } 660 } 661 board += 1; 662 if (board * processors_per_board + 0 >= limit_id) { 663 board = 0; 664 } 665 } 666 if (available_id != NULL) { 667 FREE_C_HEAP_ARRAY(bool, available_id); 668 } 669 return true; 670 } 671 672 bool os::distribute_processes(uint length, uint* distribution) { 673 bool result = false; 674 // Find the processor id's of all the available CPUs. 675 processorid_t* id_array = NULL; 676 uint id_length = 0; 677 // There are some races between querying information and using it, 678 // since processor sets can change dynamically. 679 psetid_t pset = PS_NONE; 680 // Are we running in a processor set? 681 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 682 result = find_processors_in_pset(pset, &id_array, &id_length); 683 } else { 684 result = find_processors_online(&id_array, &id_length); 685 } 686 if (result == true) { 687 if (id_length >= length) { 688 result = assign_distribution(id_array, id_length, distribution, length); 689 } else { 690 result = false; 691 } 692 } 693 if (id_array != NULL) { 694 FREE_C_HEAP_ARRAY(processorid_t, id_array); 695 } 696 return result; 697 } 698 699 bool os::bind_to_processor(uint processor_id) { 700 // We assume that a processorid_t can be stored in a uint. 701 assert(sizeof(uint) == sizeof(processorid_t), 702 "can't convert uint to processorid_t"); 703 int bind_result = 704 processor_bind(P_LWPID, // bind LWP. 705 P_MYID, // bind current LWP. 706 (processorid_t) processor_id, // id. 707 NULL); // don't return old binding. 708 return (bind_result == 0); 709 } 710 711 bool os::getenv(const char* name, char* buffer, int len) { 712 char* val = ::getenv( name ); 713 if ( val == NULL 714 || strlen(val) + 1 > len ) { 715 if (len > 0) buffer[0] = 0; // return a null string 716 return false; 717 } 718 strcpy( buffer, val ); 719 return true; 720 } 721 722 723 // Return true if user is running as root. 724 725 bool os::have_special_privileges() { 726 static bool init = false; 727 static bool privileges = false; 728 if (!init) { 729 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 730 init = true; 731 } 732 return privileges; 733 } 734 735 736 void os::init_system_properties_values() { 737 char arch[12]; 738 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 739 740 // The next steps are taken in the product version: 741 // 742 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 743 // This library should be located at: 744 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 745 // 746 // If "/jre/lib/" appears at the right place in the path, then we 747 // assume libjvm[_g].so is installed in a JDK and we use this path. 748 // 749 // Otherwise exit with message: "Could not create the Java virtual machine." 750 // 751 // The following extra steps are taken in the debugging version: 752 // 753 // If "/jre/lib/" does NOT appear at the right place in the path 754 // instead of exit check for $JAVA_HOME environment variable. 755 // 756 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 757 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 758 // it looks like libjvm[_g].so is installed there 759 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 760 // 761 // Otherwise exit. 762 // 763 // Important note: if the location of libjvm.so changes this 764 // code needs to be changed accordingly. 765 766 // The next few definitions allow the code to be verbatim: 767 #define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 768 #define free(p) FREE_C_HEAP_ARRAY(char, p) 769 #define getenv(n) ::getenv(n) 770 771 #define EXTENSIONS_DIR "/lib/ext" 772 #define ENDORSED_DIR "/lib/endorsed" 773 #define COMMON_DIR "/usr/jdk/packages" 774 775 { 776 /* sysclasspath, java_home, dll_dir */ 777 { 778 char *home_path; 779 char *dll_path; 780 char *pslash; 781 char buf[MAXPATHLEN]; 782 os::jvm_path(buf, sizeof(buf)); 783 784 // Found the full path to libjvm.so. 785 // Now cut the path to <java_home>/jre if we can. 786 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 787 pslash = strrchr(buf, '/'); 788 if (pslash != NULL) 789 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 790 dll_path = malloc(strlen(buf) + 1); 791 if (dll_path == NULL) 792 return; 793 strcpy(dll_path, buf); 794 Arguments::set_dll_dir(dll_path); 795 796 if (pslash != NULL) { 797 pslash = strrchr(buf, '/'); 798 if (pslash != NULL) { 799 *pslash = '\0'; /* get rid of /<arch> */ 800 pslash = strrchr(buf, '/'); 801 if (pslash != NULL) 802 *pslash = '\0'; /* get rid of /lib */ 803 } 804 } 805 806 home_path = malloc(strlen(buf) + 1); 807 if (home_path == NULL) 808 return; 809 strcpy(home_path, buf); 810 Arguments::set_java_home(home_path); 811 812 if (!set_boot_path('/', ':')) 813 return; 814 } 815 816 /* 817 * Where to look for native libraries 818 */ 819 { 820 // Use dlinfo() to determine the correct java.library.path. 821 // 822 // If we're launched by the Java launcher, and the user 823 // does not set java.library.path explicitly on the commandline, 824 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 825 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 826 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 827 // /usr/lib), which is exactly what we want. 828 // 829 // If the user does set java.library.path, it completely 830 // overwrites this setting, and always has. 831 // 832 // If we're not launched by the Java launcher, we may 833 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 834 // settings. Again, dlinfo does exactly what we want. 835 836 Dl_serinfo _info, *info = &_info; 837 Dl_serpath *path; 838 char* library_path; 839 char *common_path; 840 int i; 841 842 // determine search path count and required buffer size 843 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 844 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 845 } 846 847 // allocate new buffer and initialize 848 info = (Dl_serinfo*)malloc(_info.dls_size); 849 if (info == NULL) { 850 vm_exit_out_of_memory(_info.dls_size, 851 "init_system_properties_values info"); 852 } 853 info->dls_size = _info.dls_size; 854 info->dls_cnt = _info.dls_cnt; 855 856 // obtain search path information 857 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 858 free(info); 859 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 860 } 861 862 path = &info->dls_serpath[0]; 863 864 // Note: Due to a legacy implementation, most of the library path 865 // is set in the launcher. This was to accomodate linking restrictions 866 // on legacy Solaris implementations (which are no longer supported). 867 // Eventually, all the library path setting will be done here. 868 // 869 // However, to prevent the proliferation of improperly built native 870 // libraries, the new path component /usr/jdk/packages is added here. 871 872 // Determine the actual CPU architecture. 873 char cpu_arch[12]; 874 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 875 #ifdef _LP64 876 // If we are a 64-bit vm, perform the following translations: 877 // sparc -> sparcv9 878 // i386 -> amd64 879 if (strcmp(cpu_arch, "sparc") == 0) 880 strcat(cpu_arch, "v9"); 881 else if (strcmp(cpu_arch, "i386") == 0) 882 strcpy(cpu_arch, "amd64"); 883 #endif 884 885 // Construct the invariant part of ld_library_path. Note that the 886 // space for the colon and the trailing null are provided by the 887 // nulls included by the sizeof operator. 888 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 889 common_path = malloc(bufsize); 890 if (common_path == NULL) { 891 free(info); 892 vm_exit_out_of_memory(bufsize, 893 "init_system_properties_values common_path"); 894 } 895 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 896 897 // struct size is more than sufficient for the path components obtained 898 // through the dlinfo() call, so only add additional space for the path 899 // components explicitly added here. 900 bufsize = info->dls_size + strlen(common_path); 901 library_path = malloc(bufsize); 902 if (library_path == NULL) { 903 free(info); 904 free(common_path); 905 vm_exit_out_of_memory(bufsize, 906 "init_system_properties_values library_path"); 907 } 908 library_path[0] = '\0'; 909 910 // Construct the desired Java library path from the linker's library 911 // search path. 912 // 913 // For compatibility, it is optimal that we insert the additional path 914 // components specific to the Java VM after those components specified 915 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 916 // infrastructure. 917 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 918 strcpy(library_path, common_path); 919 } else { 920 int inserted = 0; 921 for (i = 0; i < info->dls_cnt; i++, path++) { 922 uint_t flags = path->dls_flags & LA_SER_MASK; 923 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 924 strcat(library_path, common_path); 925 strcat(library_path, os::path_separator()); 926 inserted = 1; 927 } 928 strcat(library_path, path->dls_name); 929 strcat(library_path, os::path_separator()); 930 } 931 // eliminate trailing path separator 932 library_path[strlen(library_path)-1] = '\0'; 933 } 934 935 // happens before argument parsing - can't use a trace flag 936 // tty->print_raw("init_system_properties_values: native lib path: "); 937 // tty->print_raw_cr(library_path); 938 939 // callee copies into its own buffer 940 Arguments::set_library_path(library_path); 941 942 free(common_path); 943 free(library_path); 944 free(info); 945 } 946 947 /* 948 * Extensions directories. 949 * 950 * Note that the space for the colon and the trailing null are provided 951 * by the nulls included by the sizeof operator (so actually one byte more 952 * than necessary is allocated). 953 */ 954 { 955 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 956 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 957 sizeof(EXTENSIONS_DIR)); 958 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 959 Arguments::get_java_home()); 960 Arguments::set_ext_dirs(buf); 961 } 962 963 /* Endorsed standards default directory. */ 964 { 965 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 966 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 967 Arguments::set_endorsed_dirs(buf); 968 } 969 } 970 971 #undef malloc 972 #undef free 973 #undef getenv 974 #undef EXTENSIONS_DIR 975 #undef ENDORSED_DIR 976 #undef COMMON_DIR 977 978 } 979 980 void os::breakpoint() { 981 BREAKPOINT; 982 } 983 984 bool os::obsolete_option(const JavaVMOption *option) 985 { 986 if (!strncmp(option->optionString, "-Xt", 3)) { 987 return true; 988 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 989 return true; 990 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 991 return true; 992 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 993 return true; 994 } 995 return false; 996 } 997 998 bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 999 address stackStart = (address)thread->stack_base(); 1000 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 1001 if (sp < stackStart && sp >= stackEnd ) return true; 1002 return false; 1003 } 1004 1005 extern "C" void breakpoint() { 1006 // use debugger to set breakpoint here 1007 } 1008 1009 // Returns an estimate of the current stack pointer. Result must be guaranteed to 1010 // point into the calling threads stack, and be no lower than the current stack 1011 // pointer. 1012 address os::current_stack_pointer() { 1013 volatile int dummy; 1014 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 1015 return sp; 1016 } 1017 1018 static thread_t main_thread; 1019 1020 // Thread start routine for all new Java threads 1021 extern "C" void* java_start(void* thread_addr) { 1022 // Try to randomize the cache line index of hot stack frames. 1023 // This helps when threads of the same stack traces evict each other's 1024 // cache lines. The threads can be either from the same JVM instance, or 1025 // from different JVM instances. The benefit is especially true for 1026 // processors with hyperthreading technology. 1027 static int counter = 0; 1028 int pid = os::current_process_id(); 1029 alloca(((pid ^ counter++) & 7) * 128); 1030 1031 int prio; 1032 Thread* thread = (Thread*)thread_addr; 1033 OSThread* osthr = thread->osthread(); 1034 1035 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 1036 thread->_schedctl = (void *) schedctl_init () ; 1037 1038 if (UseNUMA) { 1039 int lgrp_id = os::numa_get_group_id(); 1040 if (lgrp_id != -1) { 1041 thread->set_lgrp_id(lgrp_id); 1042 } 1043 } 1044 1045 // If the creator called set priority before we started, 1046 // we need to call set priority now that we have an lwp. 1047 // Get the priority from libthread and set the priority 1048 // for the new Solaris lwp. 1049 if ( osthr->thread_id() != -1 ) { 1050 if ( UseThreadPriorities ) { 1051 thr_getprio(osthr->thread_id(), &prio); 1052 if (ThreadPriorityVerbose) { 1053 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1054 osthr->thread_id(), osthr->lwp_id(), prio ); 1055 } 1056 os::set_native_priority(thread, prio); 1057 } 1058 } else if (ThreadPriorityVerbose) { 1059 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1060 } 1061 1062 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1063 1064 // initialize signal mask for this thread 1065 os::Solaris::hotspot_sigmask(thread); 1066 1067 thread->run(); 1068 1069 // One less thread is executing 1070 // When the VMThread gets here, the main thread may have already exited 1071 // which frees the CodeHeap containing the Atomic::dec code 1072 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1073 Atomic::dec(&os::Solaris::_os_thread_count); 1074 } 1075 1076 if (UseDetachedThreads) { 1077 thr_exit(NULL); 1078 ShouldNotReachHere(); 1079 } 1080 return NULL; 1081 } 1082 1083 static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1084 // Allocate the OSThread object 1085 OSThread* osthread = new OSThread(NULL, NULL); 1086 if (osthread == NULL) return NULL; 1087 1088 // Store info on the Solaris thread into the OSThread 1089 osthread->set_thread_id(thread_id); 1090 osthread->set_lwp_id(_lwp_self()); 1091 thread->_schedctl = (void *) schedctl_init () ; 1092 1093 if (UseNUMA) { 1094 int lgrp_id = os::numa_get_group_id(); 1095 if (lgrp_id != -1) { 1096 thread->set_lgrp_id(lgrp_id); 1097 } 1098 } 1099 1100 if ( ThreadPriorityVerbose ) { 1101 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1102 osthread->thread_id(), osthread->lwp_id() ); 1103 } 1104 1105 // Initial thread state is INITIALIZED, not SUSPENDED 1106 osthread->set_state(INITIALIZED); 1107 1108 return osthread; 1109 } 1110 1111 void os::Solaris::hotspot_sigmask(Thread* thread) { 1112 1113 //Save caller's signal mask 1114 sigset_t sigmask; 1115 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1116 OSThread *osthread = thread->osthread(); 1117 osthread->set_caller_sigmask(sigmask); 1118 1119 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1120 if (!ReduceSignalUsage) { 1121 if (thread->is_VM_thread()) { 1122 // Only the VM thread handles BREAK_SIGNAL ... 1123 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1124 } else { 1125 // ... all other threads block BREAK_SIGNAL 1126 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1127 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1128 } 1129 } 1130 } 1131 1132 bool os::create_attached_thread(JavaThread* thread) { 1133 #ifdef ASSERT 1134 thread->verify_not_published(); 1135 #endif 1136 OSThread* osthread = create_os_thread(thread, thr_self()); 1137 if (osthread == NULL) { 1138 return false; 1139 } 1140 1141 // Initial thread state is RUNNABLE 1142 osthread->set_state(RUNNABLE); 1143 thread->set_osthread(osthread); 1144 1145 // initialize signal mask for this thread 1146 // and save the caller's signal mask 1147 os::Solaris::hotspot_sigmask(thread); 1148 1149 return true; 1150 } 1151 1152 bool os::create_main_thread(JavaThread* thread) { 1153 #ifdef ASSERT 1154 thread->verify_not_published(); 1155 #endif 1156 if (_starting_thread == NULL) { 1157 _starting_thread = create_os_thread(thread, main_thread); 1158 if (_starting_thread == NULL) { 1159 return false; 1160 } 1161 } 1162 1163 // The primodial thread is runnable from the start 1164 _starting_thread->set_state(RUNNABLE); 1165 1166 thread->set_osthread(_starting_thread); 1167 1168 // initialize signal mask for this thread 1169 // and save the caller's signal mask 1170 os::Solaris::hotspot_sigmask(thread); 1171 1172 return true; 1173 } 1174 1175 // _T2_libthread is true if we believe we are running with the newer 1176 // SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1177 bool os::Solaris::_T2_libthread = false; 1178 1179 bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1180 // Allocate the OSThread object 1181 OSThread* osthread = new OSThread(NULL, NULL); 1182 if (osthread == NULL) { 1183 return false; 1184 } 1185 1186 if ( ThreadPriorityVerbose ) { 1187 char *thrtyp; 1188 switch ( thr_type ) { 1189 case vm_thread: 1190 thrtyp = (char *)"vm"; 1191 break; 1192 case cgc_thread: 1193 thrtyp = (char *)"cgc"; 1194 break; 1195 case pgc_thread: 1196 thrtyp = (char *)"pgc"; 1197 break; 1198 case java_thread: 1199 thrtyp = (char *)"java"; 1200 break; 1201 case compiler_thread: 1202 thrtyp = (char *)"compiler"; 1203 break; 1204 case watcher_thread: 1205 thrtyp = (char *)"watcher"; 1206 break; 1207 default: 1208 thrtyp = (char *)"unknown"; 1209 break; 1210 } 1211 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1212 } 1213 1214 // Calculate stack size if it's not specified by caller. 1215 if (stack_size == 0) { 1216 // The default stack size 1M (2M for LP64). 1217 stack_size = (BytesPerWord >> 2) * K * K; 1218 1219 switch (thr_type) { 1220 case os::java_thread: 1221 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1222 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1223 break; 1224 case os::compiler_thread: 1225 if (CompilerThreadStackSize > 0) { 1226 stack_size = (size_t)(CompilerThreadStackSize * K); 1227 break; 1228 } // else fall through: 1229 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1230 case os::vm_thread: 1231 case os::pgc_thread: 1232 case os::cgc_thread: 1233 case os::watcher_thread: 1234 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1235 break; 1236 } 1237 } 1238 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1239 1240 // Initial state is ALLOCATED but not INITIALIZED 1241 osthread->set_state(ALLOCATED); 1242 1243 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1244 // We got lots of threads. Check if we still have some address space left. 1245 // Need to be at least 5Mb of unreserved address space. We do check by 1246 // trying to reserve some. 1247 const size_t VirtualMemoryBangSize = 20*K*K; 1248 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1249 if (mem == NULL) { 1250 delete osthread; 1251 return false; 1252 } else { 1253 // Release the memory again 1254 os::release_memory(mem, VirtualMemoryBangSize); 1255 } 1256 } 1257 1258 // Setup osthread because the child thread may need it. 1259 thread->set_osthread(osthread); 1260 1261 // Create the Solaris thread 1262 // explicit THR_BOUND for T2_libthread case in case 1263 // that assumption is not accurate, but our alternate signal stack 1264 // handling is based on it which must have bound threads 1265 thread_t tid = 0; 1266 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1267 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1268 (thr_type == vm_thread) || 1269 (thr_type == cgc_thread) || 1270 (thr_type == pgc_thread) || 1271 (thr_type == compiler_thread && BackgroundCompilation)) ? 1272 THR_BOUND : 0); 1273 int status; 1274 1275 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1276 // 1277 // On multiprocessors systems, libthread sometimes under-provisions our 1278 // process with LWPs. On a 30-way systems, for instance, we could have 1279 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1280 // to our process. This can result in under utilization of PEs. 1281 // I suspect the problem is related to libthread's LWP 1282 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1283 // upcall policy. 1284 // 1285 // The following code is palliative -- it attempts to ensure that our 1286 // process has sufficient LWPs to take advantage of multiple PEs. 1287 // Proper long-term cures include using user-level threads bound to LWPs 1288 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1289 // slight timing window with respect to sampling _os_thread_count, but 1290 // the race is benign. Also, we should periodically recompute 1291 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1292 // the number of PEs in our partition. You might be tempted to use 1293 // THR_NEW_LWP here, but I'd recommend against it as that could 1294 // result in undesirable growth of the libthread's LWP pool. 1295 // The fix below isn't sufficient; for instance, it doesn't take into count 1296 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1297 // 1298 // Some pathologies this scheme doesn't handle: 1299 // * Threads can block, releasing the LWPs. The LWPs can age out. 1300 // When a large number of threads become ready again there aren't 1301 // enough LWPs available to service them. This can occur when the 1302 // number of ready threads oscillates. 1303 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1304 // 1305 // Finally, we should call thr_setconcurrency() periodically to refresh 1306 // the LWP pool and thwart the LWP age-out mechanism. 1307 // The "+3" term provides a little slop -- we want to slightly overprovision. 1308 1309 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1310 if (!(flags & THR_BOUND)) { 1311 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1312 } 1313 } 1314 // Although this doesn't hurt, we should warn of undefined behavior 1315 // when using unbound T1 threads with schedctl(). This should never 1316 // happen, as the compiler and VM threads are always created bound 1317 DEBUG_ONLY( 1318 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1319 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1320 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1321 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1322 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1323 } 1324 ); 1325 1326 1327 // Mark that we don't have an lwp or thread id yet. 1328 // In case we attempt to set the priority before the thread starts. 1329 osthread->set_lwp_id(-1); 1330 osthread->set_thread_id(-1); 1331 1332 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1333 if (status != 0) { 1334 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1335 perror("os::create_thread"); 1336 } 1337 thread->set_osthread(NULL); 1338 // Need to clean up stuff we've allocated so far 1339 delete osthread; 1340 return false; 1341 } 1342 1343 Atomic::inc(&os::Solaris::_os_thread_count); 1344 1345 // Store info on the Solaris thread into the OSThread 1346 osthread->set_thread_id(tid); 1347 1348 // Remember that we created this thread so we can set priority on it 1349 osthread->set_vm_created(); 1350 1351 // Set the default thread priority otherwise use NormalPriority 1352 1353 if ( UseThreadPriorities ) { 1354 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1355 java_to_os_priority[NormPriority] : 1356 DefaultThreadPriority); 1357 } 1358 1359 // Initial thread state is INITIALIZED, not SUSPENDED 1360 osthread->set_state(INITIALIZED); 1361 1362 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1363 return true; 1364 } 1365 1366 /* defined for >= Solaris 10. This allows builds on earlier versions 1367 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1368 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1369 * and -XX:+UseAltSigs does nothing since these should have no conflict 1370 */ 1371 #if !defined(SIGJVM1) 1372 #define SIGJVM1 39 1373 #define SIGJVM2 40 1374 #endif 1375 1376 debug_only(static bool signal_sets_initialized = false); 1377 static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1378 int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1379 int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1380 1381 bool os::Solaris::is_sig_ignored(int sig) { 1382 struct sigaction oact; 1383 sigaction(sig, (struct sigaction*)NULL, &oact); 1384 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1385 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1386 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1387 return true; 1388 else 1389 return false; 1390 } 1391 1392 // Note: SIGRTMIN is a macro that calls sysconf() so it will 1393 // dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1394 static bool isJVM1available() { 1395 return SIGJVM1 < SIGRTMIN; 1396 } 1397 1398 void os::Solaris::signal_sets_init() { 1399 // Should also have an assertion stating we are still single-threaded. 1400 assert(!signal_sets_initialized, "Already initialized"); 1401 // Fill in signals that are necessarily unblocked for all threads in 1402 // the VM. Currently, we unblock the following signals: 1403 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1404 // by -Xrs (=ReduceSignalUsage)); 1405 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1406 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1407 // the dispositions or masks wrt these signals. 1408 // Programs embedding the VM that want to use the above signals for their 1409 // own purposes must, at this time, use the "-Xrs" option to prevent 1410 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1411 // (See bug 4345157, and other related bugs). 1412 // In reality, though, unblocking these signals is really a nop, since 1413 // these signals are not blocked by default. 1414 sigemptyset(&unblocked_sigs); 1415 sigemptyset(&allowdebug_blocked_sigs); 1416 sigaddset(&unblocked_sigs, SIGILL); 1417 sigaddset(&unblocked_sigs, SIGSEGV); 1418 sigaddset(&unblocked_sigs, SIGBUS); 1419 sigaddset(&unblocked_sigs, SIGFPE); 1420 1421 if (isJVM1available) { 1422 os::Solaris::set_SIGinterrupt(SIGJVM1); 1423 os::Solaris::set_SIGasync(SIGJVM2); 1424 } else if (UseAltSigs) { 1425 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1426 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1427 } else { 1428 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1429 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1430 } 1431 1432 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1433 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1434 1435 if (!ReduceSignalUsage) { 1436 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1437 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1438 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1439 } 1440 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1441 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1442 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1443 } 1444 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1445 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1446 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1447 } 1448 } 1449 // Fill in signals that are blocked by all but the VM thread. 1450 sigemptyset(&vm_sigs); 1451 if (!ReduceSignalUsage) 1452 sigaddset(&vm_sigs, BREAK_SIGNAL); 1453 debug_only(signal_sets_initialized = true); 1454 1455 // For diagnostics only used in run_periodic_checks 1456 sigemptyset(&check_signal_done); 1457 } 1458 1459 // These are signals that are unblocked while a thread is running Java. 1460 // (For some reason, they get blocked by default.) 1461 sigset_t* os::Solaris::unblocked_signals() { 1462 assert(signal_sets_initialized, "Not initialized"); 1463 return &unblocked_sigs; 1464 } 1465 1466 // These are the signals that are blocked while a (non-VM) thread is 1467 // running Java. Only the VM thread handles these signals. 1468 sigset_t* os::Solaris::vm_signals() { 1469 assert(signal_sets_initialized, "Not initialized"); 1470 return &vm_sigs; 1471 } 1472 1473 // These are signals that are blocked during cond_wait to allow debugger in 1474 sigset_t* os::Solaris::allowdebug_blocked_signals() { 1475 assert(signal_sets_initialized, "Not initialized"); 1476 return &allowdebug_blocked_sigs; 1477 } 1478 1479 1480 void _handle_uncaught_cxx_exception() { 1481 VMError err("An uncaught C++ exception"); 1482 err.report_and_die(); 1483 } 1484 1485 1486 // First crack at OS-specific initialization, from inside the new thread. 1487 void os::initialize_thread() { 1488 int r = thr_main() ; 1489 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1490 if (r) { 1491 JavaThread* jt = (JavaThread *)Thread::current(); 1492 assert(jt != NULL,"Sanity check"); 1493 size_t stack_size; 1494 address base = jt->stack_base(); 1495 if (Arguments::created_by_java_launcher()) { 1496 // Use 2MB to allow for Solaris 7 64 bit mode. 1497 stack_size = JavaThread::stack_size_at_create() == 0 1498 ? 2048*K : JavaThread::stack_size_at_create(); 1499 1500 // There are rare cases when we may have already used more than 1501 // the basic stack size allotment before this method is invoked. 1502 // Attempt to allow for a normally sized java_stack. 1503 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1504 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1505 } else { 1506 // 6269555: If we were not created by a Java launcher, i.e. if we are 1507 // running embedded in a native application, treat the primordial thread 1508 // as much like a native attached thread as possible. This means using 1509 // the current stack size from thr_stksegment(), unless it is too large 1510 // to reliably setup guard pages. A reasonable max size is 8MB. 1511 size_t current_size = current_stack_size(); 1512 // This should never happen, but just in case.... 1513 if (current_size == 0) current_size = 2 * K * K; 1514 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1515 } 1516 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1517 stack_size = (size_t)(base - bottom); 1518 1519 assert(stack_size > 0, "Stack size calculation problem"); 1520 1521 if (stack_size > jt->stack_size()) { 1522 NOT_PRODUCT( 1523 struct rlimit limits; 1524 getrlimit(RLIMIT_STACK, &limits); 1525 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1526 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1527 ) 1528 tty->print_cr( 1529 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1530 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1531 "See limit(1) to increase the stack size limit.", 1532 stack_size / K, jt->stack_size() / K); 1533 vm_exit(1); 1534 } 1535 assert(jt->stack_size() >= stack_size, 1536 "Attempt to map more stack than was allocated"); 1537 jt->set_stack_size(stack_size); 1538 } 1539 1540 // 5/22/01: Right now alternate signal stacks do not handle 1541 // throwing stack overflow exceptions, see bug 4463178 1542 // Until a fix is found for this, T2 will NOT imply alternate signal 1543 // stacks. 1544 // If using T2 libthread threads, install an alternate signal stack. 1545 // Because alternate stacks associate with LWPs on Solaris, 1546 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1547 // we prefer to explicitly stack bang. 1548 // If not using T2 libthread, but using UseBoundThreads any threads 1549 // (primordial thread, jni_attachCurrentThread) we do not create, 1550 // probably are not bound, therefore they can not have an alternate 1551 // signal stack. Since our stack banging code is generated and 1552 // is shared across threads, all threads must be bound to allow 1553 // using alternate signal stacks. The alternative is to interpose 1554 // on _lwp_create to associate an alt sig stack with each LWP, 1555 // and this could be a problem when the JVM is embedded. 1556 // We would prefer to use alternate signal stacks with T2 1557 // Since there is currently no accurate way to detect T2 1558 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1559 // on installing alternate signal stacks 1560 1561 1562 // 05/09/03: removed alternate signal stack support for Solaris 1563 // The alternate signal stack mechanism is no longer needed to 1564 // handle stack overflow. This is now handled by allocating 1565 // guard pages (red zone) and stackbanging. 1566 // Initially the alternate signal stack mechanism was removed because 1567 // it did not work with T1 llibthread. Alternate 1568 // signal stacks MUST have all threads bound to lwps. Applications 1569 // can create their own threads and attach them without their being 1570 // bound under T1. This is frequently the case for the primordial thread. 1571 // If we were ever to reenable this mechanism we would need to 1572 // use the dynamic check for T2 libthread. 1573 1574 os::Solaris::init_thread_fpu_state(); 1575 std::set_terminate(_handle_uncaught_cxx_exception); 1576 } 1577 1578 1579 1580 // Free Solaris resources related to the OSThread 1581 void os::free_thread(OSThread* osthread) { 1582 assert(osthread != NULL, "os::free_thread but osthread not set"); 1583 1584 1585 // We are told to free resources of the argument thread, 1586 // but we can only really operate on the current thread. 1587 // The main thread must take the VMThread down synchronously 1588 // before the main thread exits and frees up CodeHeap 1589 guarantee((Thread::current()->osthread() == osthread 1590 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1591 if (Thread::current()->osthread() == osthread) { 1592 // Restore caller's signal mask 1593 sigset_t sigmask = osthread->caller_sigmask(); 1594 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1595 } 1596 delete osthread; 1597 } 1598 1599 void os::pd_start_thread(Thread* thread) { 1600 int status = thr_continue(thread->osthread()->thread_id()); 1601 assert_status(status == 0, status, "thr_continue failed"); 1602 } 1603 1604 1605 intx os::current_thread_id() { 1606 return (intx)thr_self(); 1607 } 1608 1609 static pid_t _initial_pid = 0; 1610 1611 int os::current_process_id() { 1612 return (int)(_initial_pid ? _initial_pid : getpid()); 1613 } 1614 1615 int os::allocate_thread_local_storage() { 1616 // %%% in Win32 this allocates a memory segment pointed to by a 1617 // register. Dan Stein can implement a similar feature in 1618 // Solaris. Alternatively, the VM can do the same thing 1619 // explicitly: malloc some storage and keep the pointer in a 1620 // register (which is part of the thread's context) (or keep it 1621 // in TLS). 1622 // %%% In current versions of Solaris, thr_self and TSD can 1623 // be accessed via short sequences of displaced indirections. 1624 // The value of thr_self is available as %g7(36). 1625 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1626 // assuming that the current thread already has a value bound to k. 1627 // It may be worth experimenting with such access patterns, 1628 // and later having the parameters formally exported from a Solaris 1629 // interface. I think, however, that it will be faster to 1630 // maintain the invariant that %g2 always contains the 1631 // JavaThread in Java code, and have stubs simply 1632 // treat %g2 as a caller-save register, preserving it in a %lN. 1633 thread_key_t tk; 1634 if (thr_keycreate( &tk, NULL ) ) 1635 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1636 "(%s)", strerror(errno))); 1637 return int(tk); 1638 } 1639 1640 void os::free_thread_local_storage(int index) { 1641 // %%% don't think we need anything here 1642 // if ( pthread_key_delete((pthread_key_t) tk) ) 1643 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1644 } 1645 1646 #define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1647 // small number - point is NO swap space available 1648 void os::thread_local_storage_at_put(int index, void* value) { 1649 // %%% this is used only in threadLocalStorage.cpp 1650 if (thr_setspecific((thread_key_t)index, value)) { 1651 if (errno == ENOMEM) { 1652 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1653 } else { 1654 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1655 "(%s)", strerror(errno))); 1656 } 1657 } else { 1658 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1659 } 1660 } 1661 1662 // This function could be called before TLS is initialized, for example, when 1663 // VM receives an async signal or when VM causes a fatal error during 1664 // initialization. Return NULL if thr_getspecific() fails. 1665 void* os::thread_local_storage_at(int index) { 1666 // %%% this is used only in threadLocalStorage.cpp 1667 void* r = NULL; 1668 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1669 } 1670 1671 1672 const int NANOSECS_PER_MILLISECS = 1000000; 1673 // gethrtime can move backwards if read from one cpu and then a different cpu 1674 // getTimeNanos is guaranteed to not move backward on Solaris 1675 // local spinloop created as faster for a CAS on an int than 1676 // a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1677 // supported on sparc v8 or pre supports_cx8 intel boxes. 1678 // oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1679 // i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1680 inline hrtime_t oldgetTimeNanos() { 1681 int gotlock = LOCK_INVALID; 1682 hrtime_t newtime = gethrtime(); 1683 1684 for (;;) { 1685 // grab lock for max_hrtime 1686 int curlock = max_hrtime_lock; 1687 if (curlock & LOCK_BUSY) continue; 1688 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1689 if (newtime > max_hrtime) { 1690 max_hrtime = newtime; 1691 } else { 1692 newtime = max_hrtime; 1693 } 1694 // release lock 1695 max_hrtime_lock = LOCK_FREE; 1696 return newtime; 1697 } 1698 } 1699 // gethrtime can move backwards if read from one cpu and then a different cpu 1700 // getTimeNanos is guaranteed to not move backward on Solaris 1701 inline hrtime_t getTimeNanos() { 1702 if (VM_Version::supports_cx8()) { 1703 const hrtime_t now = gethrtime(); 1704 // Use atomic long load since 32-bit x86 uses 2 registers to keep long. 1705 const hrtime_t prev = Atomic::load((volatile jlong*)&max_hrtime); 1706 if (now <= prev) return prev; // same or retrograde time; 1707 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1708 assert(obsv >= prev, "invariant"); // Monotonicity 1709 // If the CAS succeeded then we're done and return "now". 1710 // If the CAS failed and the observed value "obs" is >= now then 1711 // we should return "obs". If the CAS failed and now > obs > prv then 1712 // some other thread raced this thread and installed a new value, in which case 1713 // we could either (a) retry the entire operation, (b) retry trying to install now 1714 // or (c) just return obs. We use (c). No loop is required although in some cases 1715 // we might discard a higher "now" value in deference to a slightly lower but freshly 1716 // installed obs value. That's entirely benign -- it admits no new orderings compared 1717 // to (a) or (b) -- and greatly reduces coherence traffic. 1718 // We might also condition (c) on the magnitude of the delta between obs and now. 1719 // Avoiding excessive CAS operations to hot RW locations is critical. 1720 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1721 return (prev == obsv) ? now : obsv ; 1722 } else { 1723 return oldgetTimeNanos(); 1724 } 1725 } 1726 1727 // Time since start-up in seconds to a fine granularity. 1728 // Used by VMSelfDestructTimer and the MemProfiler. 1729 double os::elapsedTime() { 1730 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1731 } 1732 1733 jlong os::elapsed_counter() { 1734 return (jlong)(getTimeNanos() - first_hrtime); 1735 } 1736 1737 jlong os::elapsed_frequency() { 1738 return hrtime_hz; 1739 } 1740 1741 // Return the real, user, and system times in seconds from an 1742 // arbitrary fixed point in the past. 1743 bool os::getTimesSecs(double* process_real_time, 1744 double* process_user_time, 1745 double* process_system_time) { 1746 struct tms ticks; 1747 clock_t real_ticks = times(&ticks); 1748 1749 if (real_ticks == (clock_t) (-1)) { 1750 return false; 1751 } else { 1752 double ticks_per_second = (double) clock_tics_per_sec; 1753 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1754 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1755 // For consistency return the real time from getTimeNanos() 1756 // converted to seconds. 1757 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1758 1759 return true; 1760 } 1761 } 1762 1763 bool os::supports_vtime() { return true; } 1764 1765 bool os::enable_vtime() { 1766 int fd = ::open("/proc/self/ctl", O_WRONLY); 1767 if (fd == -1) 1768 return false; 1769 1770 long cmd[] = { PCSET, PR_MSACCT }; 1771 int res = ::write(fd, cmd, sizeof(long) * 2); 1772 ::close(fd); 1773 if (res != sizeof(long) * 2) 1774 return false; 1775 1776 return true; 1777 } 1778 1779 bool os::vtime_enabled() { 1780 int fd = ::open("/proc/self/status", O_RDONLY); 1781 if (fd == -1) 1782 return false; 1783 1784 pstatus_t status; 1785 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1786 ::close(fd); 1787 if (res != sizeof(pstatus_t)) 1788 return false; 1789 1790 return status.pr_flags & PR_MSACCT; 1791 } 1792 1793 double os::elapsedVTime() { 1794 return (double)gethrvtime() / (double)hrtime_hz; 1795 } 1796 1797 // Used internally for comparisons only 1798 // getTimeMillis guaranteed to not move backwards on Solaris 1799 jlong getTimeMillis() { 1800 jlong nanotime = getTimeNanos(); 1801 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1802 } 1803 1804 // Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1805 jlong os::javaTimeMillis() { 1806 timeval t; 1807 if (gettimeofday( &t, NULL) == -1) 1808 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1809 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1810 } 1811 1812 jlong os::javaTimeNanos() { 1813 return (jlong)getTimeNanos(); 1814 } 1815 1816 void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1817 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1818 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1819 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1820 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1821 } 1822 1823 char * os::local_time_string(char *buf, size_t buflen) { 1824 struct tm t; 1825 time_t long_time; 1826 time(&long_time); 1827 localtime_r(&long_time, &t); 1828 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1829 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1830 t.tm_hour, t.tm_min, t.tm_sec); 1831 return buf; 1832 } 1833 1834 // Note: os::shutdown() might be called very early during initialization, or 1835 // called from signal handler. Before adding something to os::shutdown(), make 1836 // sure it is async-safe and can handle partially initialized VM. 1837 void os::shutdown() { 1838 1839 // allow PerfMemory to attempt cleanup of any persistent resources 1840 perfMemory_exit(); 1841 1842 // needs to remove object in file system 1843 AttachListener::abort(); 1844 1845 // flush buffered output, finish log files 1846 ostream_abort(); 1847 1848 // Check for abort hook 1849 abort_hook_t abort_hook = Arguments::abort_hook(); 1850 if (abort_hook != NULL) { 1851 abort_hook(); 1852 } 1853 } 1854 1855 // Note: os::abort() might be called very early during initialization, or 1856 // called from signal handler. Before adding something to os::abort(), make 1857 // sure it is async-safe and can handle partially initialized VM. 1858 void os::abort(bool dump_core) { 1859 os::shutdown(); 1860 if (dump_core) { 1861 #ifndef PRODUCT 1862 fdStream out(defaultStream::output_fd()); 1863 out.print_raw("Current thread is "); 1864 char buf[16]; 1865 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1866 out.print_raw_cr(buf); 1867 out.print_raw_cr("Dumping core ..."); 1868 #endif 1869 ::abort(); // dump core (for debugging) 1870 } 1871 1872 ::exit(1); 1873 } 1874 1875 // Die immediately, no exit hook, no abort hook, no cleanup. 1876 void os::die() { 1877 _exit(-1); 1878 } 1879 1880 // unused 1881 void os::set_error_file(const char *logfile) {} 1882 1883 // DLL functions 1884 1885 const char* os::dll_file_extension() { return ".so"; } 1886 1887 // This must be hard coded because it's the system's temporary 1888 // directory not the java application's temp directory, ala java.io.tmpdir. 1889 const char* os::get_temp_directory() { return "/tmp"; } 1890 1891 static bool file_exists(const char* filename) { 1892 struct stat statbuf; 1893 if (filename == NULL || strlen(filename) == 0) { 1894 return false; 1895 } 1896 return os::stat(filename, &statbuf) == 0; 1897 } 1898 1899 void os::dll_build_name(char* buffer, size_t buflen, 1900 const char* pname, const char* fname) { 1901 const size_t pnamelen = pname ? strlen(pname) : 0; 1902 1903 // Quietly truncate on buffer overflow. Should be an error. 1904 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1905 *buffer = '\0'; 1906 return; 1907 } 1908 1909 if (pnamelen == 0) { 1910 snprintf(buffer, buflen, "lib%s.so", fname); 1911 } else if (strchr(pname, *os::path_separator()) != NULL) { 1912 int n; 1913 char** pelements = split_path(pname, &n); 1914 for (int i = 0 ; i < n ; i++) { 1915 // really shouldn't be NULL but what the heck, check can't hurt 1916 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1917 continue; // skip the empty path values 1918 } 1919 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1920 if (file_exists(buffer)) { 1921 break; 1922 } 1923 } 1924 // release the storage 1925 for (int i = 0 ; i < n ; i++) { 1926 if (pelements[i] != NULL) { 1927 FREE_C_HEAP_ARRAY(char, pelements[i]); 1928 } 1929 } 1930 if (pelements != NULL) { 1931 FREE_C_HEAP_ARRAY(char*, pelements); 1932 } 1933 } else { 1934 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1935 } 1936 } 1937 1938 const char* os::get_current_directory(char *buf, int buflen) { 1939 return getcwd(buf, buflen); 1940 } 1941 1942 // check if addr is inside libjvm[_g].so 1943 bool os::address_is_in_vm(address addr) { 1944 static address libjvm_base_addr; 1945 Dl_info dlinfo; 1946 1947 if (libjvm_base_addr == NULL) { 1948 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1949 libjvm_base_addr = (address)dlinfo.dli_fbase; 1950 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1951 } 1952 1953 if (dladdr((void *)addr, &dlinfo)) { 1954 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1955 } 1956 1957 return false; 1958 } 1959 1960 typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1961 static dladdr1_func_type dladdr1_func = NULL; 1962 1963 bool os::dll_address_to_function_name(address addr, char *buf, 1964 int buflen, int * offset) { 1965 Dl_info dlinfo; 1966 1967 // dladdr1_func was initialized in os::init() 1968 if (dladdr1_func){ 1969 // yes, we have dladdr1 1970 1971 // Support for dladdr1 is checked at runtime; it may be 1972 // available even if the vm is built on a machine that does 1973 // not have dladdr1 support. Make sure there is a value for 1974 // RTLD_DL_SYMENT. 1975 #ifndef RTLD_DL_SYMENT 1976 #define RTLD_DL_SYMENT 1 1977 #endif 1978 #ifdef _LP64 1979 Elf64_Sym * info; 1980 #else 1981 Elf32_Sym * info; 1982 #endif 1983 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1984 RTLD_DL_SYMENT)) { 1985 if ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1986 if (buf != NULL) { 1987 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 1988 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1989 } 1990 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1991 return true; 1992 } 1993 } 1994 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 1995 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1996 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 1997 return true; 1998 } 1999 } 2000 if (buf != NULL) buf[0] = '\0'; 2001 if (offset != NULL) *offset = -1; 2002 return false; 2003 } else { 2004 // no, only dladdr is available 2005 if (dladdr((void *)addr, &dlinfo)) { 2006 if (buf != NULL) { 2007 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) 2008 jio_snprintf(buf, buflen, dlinfo.dli_sname); 2009 } 2010 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 2011 return true; 2012 } else if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != 0) { 2013 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 2014 dlinfo.dli_fname, buf, buflen, offset) == Decoder::no_error) { 2015 return true; 2016 } 2017 } 2018 if (buf != NULL) buf[0] = '\0'; 2019 if (offset != NULL) *offset = -1; 2020 return false; 2021 } 2022 } 2023 2024 bool os::dll_address_to_library_name(address addr, char* buf, 2025 int buflen, int* offset) { 2026 Dl_info dlinfo; 2027 2028 if (dladdr((void*)addr, &dlinfo)){ 2029 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 2030 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 2031 return true; 2032 } else { 2033 if (buf) buf[0] = '\0'; 2034 if (offset) *offset = -1; 2035 return false; 2036 } 2037 } 2038 2039 // Prints the names and full paths of all opened dynamic libraries 2040 // for current process 2041 void os::print_dll_info(outputStream * st) { 2042 Dl_info dli; 2043 void *handle; 2044 Link_map *map; 2045 Link_map *p; 2046 2047 st->print_cr("Dynamic libraries:"); st->flush(); 2048 2049 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 2050 st->print_cr("Error: Cannot print dynamic libraries."); 2051 return; 2052 } 2053 handle = dlopen(dli.dli_fname, RTLD_LAZY); 2054 if (handle == NULL) { 2055 st->print_cr("Error: Cannot print dynamic libraries."); 2056 return; 2057 } 2058 dlinfo(handle, RTLD_DI_LINKMAP, &map); 2059 if (map == NULL) { 2060 st->print_cr("Error: Cannot print dynamic libraries."); 2061 return; 2062 } 2063 2064 while (map->l_prev != NULL) 2065 map = map->l_prev; 2066 2067 while (map != NULL) { 2068 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 2069 map = map->l_next; 2070 } 2071 2072 dlclose(handle); 2073 } 2074 2075 // Loads .dll/.so and 2076 // in case of error it checks if .dll/.so was built for the 2077 // same architecture as Hotspot is running on 2078 2079 void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 2080 { 2081 void * result= ::dlopen(filename, RTLD_LAZY); 2082 if (result != NULL) { 2083 // Successful loading 2084 return result; 2085 } 2086 2087 Elf32_Ehdr elf_head; 2088 2089 // Read system error message into ebuf 2090 // It may or may not be overwritten below 2091 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 2092 ebuf[ebuflen-1]='\0'; 2093 int diag_msg_max_length=ebuflen-strlen(ebuf); 2094 char* diag_msg_buf=ebuf+strlen(ebuf); 2095 2096 if (diag_msg_max_length==0) { 2097 // No more space in ebuf for additional diagnostics message 2098 return NULL; 2099 } 2100 2101 2102 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 2103 2104 if (file_descriptor < 0) { 2105 // Can't open library, report dlerror() message 2106 return NULL; 2107 } 2108 2109 bool failed_to_read_elf_head= 2110 (sizeof(elf_head)!= 2111 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2112 2113 ::close(file_descriptor); 2114 if (failed_to_read_elf_head) { 2115 // file i/o error - report dlerror() msg 2116 return NULL; 2117 } 2118 2119 typedef struct { 2120 Elf32_Half code; // Actual value as defined in elf.h 2121 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2122 char elf_class; // 32 or 64 bit 2123 char endianess; // MSB or LSB 2124 char* name; // String representation 2125 } arch_t; 2126 2127 static const arch_t arch_array[]={ 2128 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2129 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2130 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2131 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2132 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2133 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2134 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2135 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2136 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 2137 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 2138 }; 2139 2140 #if (defined IA32) 2141 static Elf32_Half running_arch_code=EM_386; 2142 #elif (defined AMD64) 2143 static Elf32_Half running_arch_code=EM_X86_64; 2144 #elif (defined IA64) 2145 static Elf32_Half running_arch_code=EM_IA_64; 2146 #elif (defined __sparc) && (defined _LP64) 2147 static Elf32_Half running_arch_code=EM_SPARCV9; 2148 #elif (defined __sparc) && (!defined _LP64) 2149 static Elf32_Half running_arch_code=EM_SPARC; 2150 #elif (defined __powerpc64__) 2151 static Elf32_Half running_arch_code=EM_PPC64; 2152 #elif (defined __powerpc__) 2153 static Elf32_Half running_arch_code=EM_PPC; 2154 #elif (defined ARM) 2155 static Elf32_Half running_arch_code=EM_ARM; 2156 #else 2157 #error Method os::dll_load requires that one of following is defined:\ 2158 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 2159 #endif 2160 2161 // Identify compatability class for VM's architecture and library's architecture 2162 // Obtain string descriptions for architectures 2163 2164 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2165 int running_arch_index=-1; 2166 2167 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2168 if (running_arch_code == arch_array[i].code) { 2169 running_arch_index = i; 2170 } 2171 if (lib_arch.code == arch_array[i].code) { 2172 lib_arch.compat_class = arch_array[i].compat_class; 2173 lib_arch.name = arch_array[i].name; 2174 } 2175 } 2176 2177 assert(running_arch_index != -1, 2178 "Didn't find running architecture code (running_arch_code) in arch_array"); 2179 if (running_arch_index == -1) { 2180 // Even though running architecture detection failed 2181 // we may still continue with reporting dlerror() message 2182 return NULL; 2183 } 2184 2185 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2186 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2187 return NULL; 2188 } 2189 2190 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2191 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2192 return NULL; 2193 } 2194 2195 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2196 if ( lib_arch.name!=NULL ) { 2197 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2198 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2199 lib_arch.name, arch_array[running_arch_index].name); 2200 } else { 2201 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2202 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2203 lib_arch.code, 2204 arch_array[running_arch_index].name); 2205 } 2206 } 2207 2208 return NULL; 2209 } 2210 2211 void* os::dll_lookup(void* handle, const char* name) { 2212 return dlsym(handle, name); 2213 } 2214 2215 int os::stat(const char *path, struct stat *sbuf) { 2216 char pathbuf[MAX_PATH]; 2217 if (strlen(path) > MAX_PATH - 1) { 2218 errno = ENAMETOOLONG; 2219 return -1; 2220 } 2221 os::native_path(strcpy(pathbuf, path)); 2222 return ::stat(pathbuf, sbuf); 2223 } 2224 2225 static bool _print_ascii_file(const char* filename, outputStream* st) { 2226 int fd = ::open(filename, O_RDONLY); 2227 if (fd == -1) { 2228 return false; 2229 } 2230 2231 char buf[32]; 2232 int bytes; 2233 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 2234 st->print_raw(buf, bytes); 2235 } 2236 2237 ::close(fd); 2238 2239 return true; 2240 } 2241 2242 void os::print_os_info(outputStream* st) { 2243 st->print("OS:"); 2244 2245 if (!_print_ascii_file("/etc/release", st)) { 2246 st->print("Solaris"); 2247 } 2248 st->cr(); 2249 2250 // kernel 2251 st->print("uname:"); 2252 struct utsname name; 2253 uname(&name); 2254 st->print(name.sysname); st->print(" "); 2255 st->print(name.release); st->print(" "); 2256 st->print(name.version); st->print(" "); 2257 st->print(name.machine); 2258 2259 // libthread 2260 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2261 else st->print(" (T1 libthread)"); 2262 st->cr(); 2263 2264 // rlimit 2265 st->print("rlimit:"); 2266 struct rlimit rlim; 2267 2268 st->print(" STACK "); 2269 getrlimit(RLIMIT_STACK, &rlim); 2270 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2271 else st->print("%uk", rlim.rlim_cur >> 10); 2272 2273 st->print(", CORE "); 2274 getrlimit(RLIMIT_CORE, &rlim); 2275 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2276 else st->print("%uk", rlim.rlim_cur >> 10); 2277 2278 st->print(", NOFILE "); 2279 getrlimit(RLIMIT_NOFILE, &rlim); 2280 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2281 else st->print("%d", rlim.rlim_cur); 2282 2283 st->print(", AS "); 2284 getrlimit(RLIMIT_AS, &rlim); 2285 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2286 else st->print("%uk", rlim.rlim_cur >> 10); 2287 st->cr(); 2288 2289 // load average 2290 st->print("load average:"); 2291 double loadavg[3]; 2292 os::loadavg(loadavg, 3); 2293 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2294 st->cr(); 2295 } 2296 2297 2298 static bool check_addr0(outputStream* st) { 2299 jboolean status = false; 2300 int fd = ::open("/proc/self/map",O_RDONLY); 2301 if (fd >= 0) { 2302 prmap_t p; 2303 while(::read(fd, &p, sizeof(p)) > 0) { 2304 if (p.pr_vaddr == 0x0) { 2305 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2306 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2307 st->print("Access:"); 2308 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2309 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2310 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2311 st->cr(); 2312 status = true; 2313 } 2314 ::close(fd); 2315 } 2316 } 2317 return status; 2318 } 2319 2320 void os::pd_print_cpu_info(outputStream* st) { 2321 // Nothing to do for now. 2322 } 2323 2324 void os::print_memory_info(outputStream* st) { 2325 st->print("Memory:"); 2326 st->print(" %dk page", os::vm_page_size()>>10); 2327 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2328 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2329 st->cr(); 2330 (void) check_addr0(st); 2331 } 2332 2333 // Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2334 // but they're the same for all the solaris architectures that we support. 2335 const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2336 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2337 "ILL_COPROC", "ILL_BADSTK" }; 2338 2339 const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2340 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2341 "FPE_FLTINV", "FPE_FLTSUB" }; 2342 2343 const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2344 2345 const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2346 2347 void os::print_siginfo(outputStream* st, void* siginfo) { 2348 st->print("siginfo:"); 2349 2350 const int buflen = 100; 2351 char buf[buflen]; 2352 siginfo_t *si = (siginfo_t*)siginfo; 2353 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2354 char *err = strerror(si->si_errno); 2355 if (si->si_errno != 0 && err != NULL) { 2356 st->print("si_errno=%s", err); 2357 } else { 2358 st->print("si_errno=%d", si->si_errno); 2359 } 2360 const int c = si->si_code; 2361 assert(c > 0, "unexpected si_code"); 2362 switch (si->si_signo) { 2363 case SIGILL: 2364 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2365 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2366 break; 2367 case SIGFPE: 2368 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2369 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2370 break; 2371 case SIGSEGV: 2372 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2373 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2374 break; 2375 case SIGBUS: 2376 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2377 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2378 break; 2379 default: 2380 st->print(", si_code=%d", si->si_code); 2381 // no si_addr 2382 } 2383 2384 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2385 UseSharedSpaces) { 2386 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2387 if (mapinfo->is_in_shared_space(si->si_addr)) { 2388 st->print("\n\nError accessing class data sharing archive." \ 2389 " Mapped file inaccessible during execution, " \ 2390 " possible disk/network problem."); 2391 } 2392 } 2393 st->cr(); 2394 } 2395 2396 // Moved from whole group, because we need them here for diagnostic 2397 // prints. 2398 #define OLDMAXSIGNUM 32 2399 static int Maxsignum = 0; 2400 static int *ourSigFlags = NULL; 2401 2402 extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2403 2404 int os::Solaris::get_our_sigflags(int sig) { 2405 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2406 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2407 return ourSigFlags[sig]; 2408 } 2409 2410 void os::Solaris::set_our_sigflags(int sig, int flags) { 2411 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2412 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2413 ourSigFlags[sig] = flags; 2414 } 2415 2416 2417 static const char* get_signal_handler_name(address handler, 2418 char* buf, int buflen) { 2419 int offset; 2420 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2421 if (found) { 2422 // skip directory names 2423 const char *p1, *p2; 2424 p1 = buf; 2425 size_t len = strlen(os::file_separator()); 2426 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2427 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2428 } else { 2429 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2430 } 2431 return buf; 2432 } 2433 2434 static void print_signal_handler(outputStream* st, int sig, 2435 char* buf, size_t buflen) { 2436 struct sigaction sa; 2437 2438 sigaction(sig, NULL, &sa); 2439 2440 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2441 2442 address handler = (sa.sa_flags & SA_SIGINFO) 2443 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2444 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2445 2446 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2447 st->print("SIG_DFL"); 2448 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2449 st->print("SIG_IGN"); 2450 } else { 2451 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2452 } 2453 2454 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2455 2456 address rh = VMError::get_resetted_sighandler(sig); 2457 // May be, handler was resetted by VMError? 2458 if(rh != NULL) { 2459 handler = rh; 2460 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2461 } 2462 2463 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2464 2465 // Check: is it our handler? 2466 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2467 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2468 // It is our signal handler 2469 // check for flags 2470 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2471 st->print( 2472 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2473 os::Solaris::get_our_sigflags(sig)); 2474 } 2475 } 2476 st->cr(); 2477 } 2478 2479 void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2480 st->print_cr("Signal Handlers:"); 2481 print_signal_handler(st, SIGSEGV, buf, buflen); 2482 print_signal_handler(st, SIGBUS , buf, buflen); 2483 print_signal_handler(st, SIGFPE , buf, buflen); 2484 print_signal_handler(st, SIGPIPE, buf, buflen); 2485 print_signal_handler(st, SIGXFSZ, buf, buflen); 2486 print_signal_handler(st, SIGILL , buf, buflen); 2487 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2488 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2489 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2490 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2491 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2492 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2493 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2494 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2495 } 2496 2497 static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2498 2499 // Find the full path to the current module, libjvm.so or libjvm_g.so 2500 void os::jvm_path(char *buf, jint buflen) { 2501 // Error checking. 2502 if (buflen < MAXPATHLEN) { 2503 assert(false, "must use a large-enough buffer"); 2504 buf[0] = '\0'; 2505 return; 2506 } 2507 // Lazy resolve the path to current module. 2508 if (saved_jvm_path[0] != 0) { 2509 strcpy(buf, saved_jvm_path); 2510 return; 2511 } 2512 2513 Dl_info dlinfo; 2514 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2515 assert(ret != 0, "cannot locate libjvm"); 2516 realpath((char *)dlinfo.dli_fname, buf); 2517 2518 if (Arguments::created_by_gamma_launcher()) { 2519 // Support for the gamma launcher. Typical value for buf is 2520 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2521 // the right place in the string, then assume we are installed in a JDK and 2522 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2523 // up the path so it looks like libjvm.so is installed there (append a 2524 // fake suffix hotspot/libjvm.so). 2525 const char *p = buf + strlen(buf) - 1; 2526 for (int count = 0; p > buf && count < 5; ++count) { 2527 for (--p; p > buf && *p != '/'; --p) 2528 /* empty */ ; 2529 } 2530 2531 if (strncmp(p, "/jre/lib/", 9) != 0) { 2532 // Look for JAVA_HOME in the environment. 2533 char* java_home_var = ::getenv("JAVA_HOME"); 2534 if (java_home_var != NULL && java_home_var[0] != 0) { 2535 char cpu_arch[12]; 2536 char* jrelib_p; 2537 int len; 2538 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2539 #ifdef _LP64 2540 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2541 if (strcmp(cpu_arch, "sparc") == 0) { 2542 strcat(cpu_arch, "v9"); 2543 } else if (strcmp(cpu_arch, "i386") == 0) { 2544 strcpy(cpu_arch, "amd64"); 2545 } 2546 #endif 2547 // Check the current module name "libjvm.so" or "libjvm_g.so". 2548 p = strrchr(buf, '/'); 2549 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2550 p = strstr(p, "_g") ? "_g" : ""; 2551 2552 realpath(java_home_var, buf); 2553 // determine if this is a legacy image or modules image 2554 // modules image doesn't have "jre" subdirectory 2555 len = strlen(buf); 2556 jrelib_p = buf + len; 2557 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2558 if (0 != access(buf, F_OK)) { 2559 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2560 } 2561 2562 if (0 == access(buf, F_OK)) { 2563 // Use current module name "libjvm[_g].so" instead of 2564 // "libjvm"debug_only("_g")".so" since for fastdebug version 2565 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2566 len = strlen(buf); 2567 snprintf(buf + len, buflen-len, "/hotspot/libjvm%s.so", p); 2568 } else { 2569 // Go back to path of .so 2570 realpath((char *)dlinfo.dli_fname, buf); 2571 } 2572 } 2573 } 2574 } 2575 2576 strcpy(saved_jvm_path, buf); 2577 } 2578 2579 2580 void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2581 // no prefix required, not even "_" 2582 } 2583 2584 2585 void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2586 // no suffix required 2587 } 2588 2589 // This method is a copy of JDK's sysGetLastErrorString 2590 // from src/solaris/hpi/src/system_md.c 2591 2592 size_t os::lasterror(char *buf, size_t len) { 2593 2594 if (errno == 0) return 0; 2595 2596 const char *s = ::strerror(errno); 2597 size_t n = ::strlen(s); 2598 if (n >= len) { 2599 n = len - 1; 2600 } 2601 ::strncpy(buf, s, n); 2602 buf[n] = '\0'; 2603 return n; 2604 } 2605 2606 2607 // sun.misc.Signal 2608 2609 extern "C" { 2610 static void UserHandler(int sig, void *siginfo, void *context) { 2611 // Ctrl-C is pressed during error reporting, likely because the error 2612 // handler fails to abort. Let VM die immediately. 2613 if (sig == SIGINT && is_error_reported()) { 2614 os::die(); 2615 } 2616 2617 os::signal_notify(sig); 2618 // We do not need to reinstate the signal handler each time... 2619 } 2620 } 2621 2622 void* os::user_handler() { 2623 return CAST_FROM_FN_PTR(void*, UserHandler); 2624 } 2625 2626 extern "C" { 2627 typedef void (*sa_handler_t)(int); 2628 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2629 } 2630 2631 void* os::signal(int signal_number, void* handler) { 2632 struct sigaction sigAct, oldSigAct; 2633 sigfillset(&(sigAct.sa_mask)); 2634 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2635 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2636 2637 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2638 // -1 means registration failed 2639 return (void *)-1; 2640 2641 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2642 } 2643 2644 void os::signal_raise(int signal_number) { 2645 raise(signal_number); 2646 } 2647 2648 /* 2649 * The following code is moved from os.cpp for making this 2650 * code platform specific, which it is by its very nature. 2651 */ 2652 2653 // a counter for each possible signal value 2654 static int Sigexit = 0; 2655 static int Maxlibjsigsigs; 2656 static jint *pending_signals = NULL; 2657 static int *preinstalled_sigs = NULL; 2658 static struct sigaction *chainedsigactions = NULL; 2659 static sema_t sig_sem; 2660 typedef int (*version_getting_t)(); 2661 version_getting_t os::Solaris::get_libjsig_version = NULL; 2662 static int libjsigversion = NULL; 2663 2664 int os::sigexitnum_pd() { 2665 assert(Sigexit > 0, "signal memory not yet initialized"); 2666 return Sigexit; 2667 } 2668 2669 void os::Solaris::init_signal_mem() { 2670 // Initialize signal structures 2671 Maxsignum = SIGRTMAX; 2672 Sigexit = Maxsignum+1; 2673 assert(Maxsignum >0, "Unable to obtain max signal number"); 2674 2675 Maxlibjsigsigs = Maxsignum; 2676 2677 // pending_signals has one int per signal 2678 // The additional signal is for SIGEXIT - exit signal to signal_thread 2679 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2680 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2681 2682 if (UseSignalChaining) { 2683 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2684 * (Maxsignum + 1)); 2685 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2686 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2687 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2688 } 2689 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2690 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2691 } 2692 2693 void os::signal_init_pd() { 2694 int ret; 2695 2696 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2697 assert(ret == 0, "sema_init() failed"); 2698 } 2699 2700 void os::signal_notify(int signal_number) { 2701 int ret; 2702 2703 Atomic::inc(&pending_signals[signal_number]); 2704 ret = ::sema_post(&sig_sem); 2705 assert(ret == 0, "sema_post() failed"); 2706 } 2707 2708 static int check_pending_signals(bool wait_for_signal) { 2709 int ret; 2710 while (true) { 2711 for (int i = 0; i < Sigexit + 1; i++) { 2712 jint n = pending_signals[i]; 2713 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2714 return i; 2715 } 2716 } 2717 if (!wait_for_signal) { 2718 return -1; 2719 } 2720 JavaThread *thread = JavaThread::current(); 2721 ThreadBlockInVM tbivm(thread); 2722 2723 bool threadIsSuspended; 2724 do { 2725 thread->set_suspend_equivalent(); 2726 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2727 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2728 ; 2729 assert(ret == 0, "sema_wait() failed"); 2730 2731 // were we externally suspended while we were waiting? 2732 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2733 if (threadIsSuspended) { 2734 // 2735 // The semaphore has been incremented, but while we were waiting 2736 // another thread suspended us. We don't want to continue running 2737 // while suspended because that would surprise the thread that 2738 // suspended us. 2739 // 2740 ret = ::sema_post(&sig_sem); 2741 assert(ret == 0, "sema_post() failed"); 2742 2743 thread->java_suspend_self(); 2744 } 2745 } while (threadIsSuspended); 2746 } 2747 } 2748 2749 int os::signal_lookup() { 2750 return check_pending_signals(false); 2751 } 2752 2753 int os::signal_wait() { 2754 return check_pending_signals(true); 2755 } 2756 2757 //////////////////////////////////////////////////////////////////////////////// 2758 // Virtual Memory 2759 2760 static int page_size = -1; 2761 2762 // The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2763 // clear this var if support is not available. 2764 static bool has_map_align = true; 2765 2766 int os::vm_page_size() { 2767 assert(page_size != -1, "must call os::init"); 2768 return page_size; 2769 } 2770 2771 // Solaris allocates memory by pages. 2772 int os::vm_allocation_granularity() { 2773 assert(page_size != -1, "must call os::init"); 2774 return page_size; 2775 } 2776 2777 bool os::commit_memory(char* addr, size_t bytes, bool exec) { 2778 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2779 size_t size = bytes; 2780 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2781 if (UseNUMAInterleaving) { 2782 numa_make_global(addr, bytes); 2783 } 2784 return res != NULL; 2785 } 2786 2787 bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2788 bool exec) { 2789 if (commit_memory(addr, bytes, exec)) { 2790 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2791 // If the large page size has been set and the VM 2792 // is using large pages, use the large page size 2793 // if it is smaller than the alignment hint. This is 2794 // a case where the VM wants to use a larger alignment size 2795 // for its own reasons but still want to use large pages 2796 // (which is what matters to setting the mpss range. 2797 size_t page_size = 0; 2798 if (large_page_size() < alignment_hint) { 2799 assert(UseLargePages, "Expected to be here for large page use only"); 2800 page_size = large_page_size(); 2801 } else { 2802 // If the alignment hint is less than the large page 2803 // size, the VM wants a particular alignment (thus the hint) 2804 // for internal reasons. Try to set the mpss range using 2805 // the alignment_hint. 2806 page_size = alignment_hint; 2807 } 2808 // Since this is a hint, ignore any failures. 2809 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2810 } 2811 return true; 2812 } 2813 return false; 2814 } 2815 2816 // Uncommit the pages in a specified region. 2817 void os::free_memory(char* addr, size_t bytes) { 2818 if (madvise(addr, bytes, MADV_FREE) < 0) { 2819 debug_only(warning("MADV_FREE failed.")); 2820 return; 2821 } 2822 } 2823 2824 bool os::create_stack_guard_pages(char* addr, size_t size) { 2825 return os::commit_memory(addr, size); 2826 } 2827 2828 bool os::remove_stack_guard_pages(char* addr, size_t size) { 2829 return os::uncommit_memory(addr, size); 2830 } 2831 2832 // Change the page size in a given range. 2833 void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2834 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2835 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2836 if (UseLargePages && UseMPSS) { 2837 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2838 } 2839 } 2840 2841 // Tell the OS to make the range local to the first-touching LWP 2842 void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2843 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2844 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2845 debug_only(warning("MADV_ACCESS_LWP failed.")); 2846 } 2847 } 2848 2849 // Tell the OS that this range would be accessed from different LWPs. 2850 void os::numa_make_global(char *addr, size_t bytes) { 2851 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2852 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2853 debug_only(warning("MADV_ACCESS_MANY failed.")); 2854 } 2855 } 2856 2857 // Get the number of the locality groups. 2858 size_t os::numa_get_groups_num() { 2859 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2860 return n != -1 ? n : 1; 2861 } 2862 2863 // Get a list of leaf locality groups. A leaf lgroup is group that 2864 // doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2865 // board. An LWP is assigned to one of these groups upon creation. 2866 size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2867 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2868 ids[0] = 0; 2869 return 1; 2870 } 2871 int result_size = 0, top = 1, bottom = 0, cur = 0; 2872 for (int k = 0; k < size; k++) { 2873 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2874 (Solaris::lgrp_id_t*)&ids[top], size - top); 2875 if (r == -1) { 2876 ids[0] = 0; 2877 return 1; 2878 } 2879 if (!r) { 2880 // That's a leaf node. 2881 assert (bottom <= cur, "Sanity check"); 2882 // Check if the node has memory 2883 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2884 NULL, 0, LGRP_RSRC_MEM) > 0) { 2885 ids[bottom++] = ids[cur]; 2886 } 2887 } 2888 top += r; 2889 cur++; 2890 } 2891 if (bottom == 0) { 2892 // Handle a situation, when the OS reports no memory available. 2893 // Assume UMA architecture. 2894 ids[0] = 0; 2895 return 1; 2896 } 2897 return bottom; 2898 } 2899 2900 // Detect the topology change. Typically happens during CPU plugging-unplugging. 2901 bool os::numa_topology_changed() { 2902 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2903 if (is_stale != -1 && is_stale) { 2904 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2905 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2906 assert(c != 0, "Failure to initialize LGRP API"); 2907 Solaris::set_lgrp_cookie(c); 2908 return true; 2909 } 2910 return false; 2911 } 2912 2913 // Get the group id of the current LWP. 2914 int os::numa_get_group_id() { 2915 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2916 if (lgrp_id == -1) { 2917 return 0; 2918 } 2919 const int size = os::numa_get_groups_num(); 2920 int *ids = (int*)alloca(size * sizeof(int)); 2921 2922 // Get the ids of all lgroups with memory; r is the count. 2923 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2924 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2925 if (r <= 0) { 2926 return 0; 2927 } 2928 return ids[os::random() % r]; 2929 } 2930 2931 // Request information about the page. 2932 bool os::get_page_info(char *start, page_info* info) { 2933 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2934 uint64_t addr = (uintptr_t)start; 2935 uint64_t outdata[2]; 2936 uint_t validity = 0; 2937 2938 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2939 return false; 2940 } 2941 2942 info->size = 0; 2943 info->lgrp_id = -1; 2944 2945 if ((validity & 1) != 0) { 2946 if ((validity & 2) != 0) { 2947 info->lgrp_id = outdata[0]; 2948 } 2949 if ((validity & 4) != 0) { 2950 info->size = outdata[1]; 2951 } 2952 return true; 2953 } 2954 return false; 2955 } 2956 2957 // Scan the pages from start to end until a page different than 2958 // the one described in the info parameter is encountered. 2959 char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2960 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2961 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2962 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2963 uint_t validity[MAX_MEMINFO_CNT]; 2964 2965 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2966 uint64_t p = (uint64_t)start; 2967 while (p < (uint64_t)end) { 2968 addrs[0] = p; 2969 size_t addrs_count = 1; 2970 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2971 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2972 addrs_count++; 2973 } 2974 2975 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2976 return NULL; 2977 } 2978 2979 size_t i = 0; 2980 for (; i < addrs_count; i++) { 2981 if ((validity[i] & 1) != 0) { 2982 if ((validity[i] & 4) != 0) { 2983 if (outdata[types * i + 1] != page_expected->size) { 2984 break; 2985 } 2986 } else 2987 if (page_expected->size != 0) { 2988 break; 2989 } 2990 2991 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2992 if (outdata[types * i] != page_expected->lgrp_id) { 2993 break; 2994 } 2995 } 2996 } else { 2997 return NULL; 2998 } 2999 } 3000 3001 if (i != addrs_count) { 3002 if ((validity[i] & 2) != 0) { 3003 page_found->lgrp_id = outdata[types * i]; 3004 } else { 3005 page_found->lgrp_id = -1; 3006 } 3007 if ((validity[i] & 4) != 0) { 3008 page_found->size = outdata[types * i + 1]; 3009 } else { 3010 page_found->size = 0; 3011 } 3012 return (char*)addrs[i]; 3013 } 3014 3015 p = addrs[addrs_count - 1] + page_size; 3016 } 3017 return end; 3018 } 3019 3020 bool os::uncommit_memory(char* addr, size_t bytes) { 3021 size_t size = bytes; 3022 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3023 // uncommitted page. Otherwise, the read/write might succeed if we 3024 // have enough swap space to back the physical page. 3025 return 3026 NULL != Solaris::mmap_chunk(addr, size, 3027 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 3028 PROT_NONE); 3029 } 3030 3031 char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 3032 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 3033 3034 if (b == MAP_FAILED) { 3035 return NULL; 3036 } 3037 return b; 3038 } 3039 3040 char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 3041 char* addr = requested_addr; 3042 int flags = MAP_PRIVATE | MAP_NORESERVE; 3043 3044 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 3045 3046 if (fixed) { 3047 flags |= MAP_FIXED; 3048 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 3049 flags |= MAP_ALIGN; 3050 addr = (char*) alignment_hint; 3051 } 3052 3053 // Map uncommitted pages PROT_NONE so we fail early if we touch an 3054 // uncommitted page. Otherwise, the read/write might succeed if we 3055 // have enough swap space to back the physical page. 3056 return mmap_chunk(addr, bytes, flags, PROT_NONE); 3057 } 3058 3059 char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 3060 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 3061 3062 guarantee(requested_addr == NULL || requested_addr == addr, 3063 "OS failed to return requested mmap address."); 3064 return addr; 3065 } 3066 3067 // Reserve memory at an arbitrary address, only if that area is 3068 // available (and not reserved for something else). 3069 3070 char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 3071 const int max_tries = 10; 3072 char* base[max_tries]; 3073 size_t size[max_tries]; 3074 3075 // Solaris adds a gap between mmap'ed regions. The size of the gap 3076 // is dependent on the requested size and the MMU. Our initial gap 3077 // value here is just a guess and will be corrected later. 3078 bool had_top_overlap = false; 3079 bool have_adjusted_gap = false; 3080 size_t gap = 0x400000; 3081 3082 // Assert only that the size is a multiple of the page size, since 3083 // that's all that mmap requires, and since that's all we really know 3084 // about at this low abstraction level. If we need higher alignment, 3085 // we can either pass an alignment to this method or verify alignment 3086 // in one of the methods further up the call chain. See bug 5044738. 3087 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 3088 3089 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 3090 // Give it a try, if the kernel honors the hint we can return immediately. 3091 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 3092 volatile int err = errno; 3093 if (addr == requested_addr) { 3094 return addr; 3095 } else if (addr != NULL) { 3096 unmap_memory(addr, bytes); 3097 } 3098 3099 if (PrintMiscellaneous && Verbose) { 3100 char buf[256]; 3101 buf[0] = '\0'; 3102 if (addr == NULL) { 3103 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 3104 } 3105 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 3106 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 3107 "%s", bytes, requested_addr, addr, buf); 3108 } 3109 3110 // Address hint method didn't work. Fall back to the old method. 3111 // In theory, once SNV becomes our oldest supported platform, this 3112 // code will no longer be needed. 3113 // 3114 // Repeatedly allocate blocks until the block is allocated at the 3115 // right spot. Give up after max_tries. 3116 int i; 3117 for (i = 0; i < max_tries; ++i) { 3118 base[i] = reserve_memory(bytes); 3119 3120 if (base[i] != NULL) { 3121 // Is this the block we wanted? 3122 if (base[i] == requested_addr) { 3123 size[i] = bytes; 3124 break; 3125 } 3126 3127 // check that the gap value is right 3128 if (had_top_overlap && !have_adjusted_gap) { 3129 size_t actual_gap = base[i-1] - base[i] - bytes; 3130 if (gap != actual_gap) { 3131 // adjust the gap value and retry the last 2 allocations 3132 assert(i > 0, "gap adjustment code problem"); 3133 have_adjusted_gap = true; // adjust the gap only once, just in case 3134 gap = actual_gap; 3135 if (PrintMiscellaneous && Verbose) { 3136 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 3137 } 3138 unmap_memory(base[i], bytes); 3139 unmap_memory(base[i-1], size[i-1]); 3140 i-=2; 3141 continue; 3142 } 3143 } 3144 3145 // Does this overlap the block we wanted? Give back the overlapped 3146 // parts and try again. 3147 // 3148 // There is still a bug in this code: if top_overlap == bytes, 3149 // the overlap is offset from requested region by the value of gap. 3150 // In this case giving back the overlapped part will not work, 3151 // because we'll give back the entire block at base[i] and 3152 // therefore the subsequent allocation will not generate a new gap. 3153 // This could be fixed with a new algorithm that used larger 3154 // or variable size chunks to find the requested region - 3155 // but such a change would introduce additional complications. 3156 // It's rare enough that the planets align for this bug, 3157 // so we'll just wait for a fix for 6204603/5003415 which 3158 // will provide a mmap flag to allow us to avoid this business. 3159 3160 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 3161 if (top_overlap >= 0 && top_overlap < bytes) { 3162 had_top_overlap = true; 3163 unmap_memory(base[i], top_overlap); 3164 base[i] += top_overlap; 3165 size[i] = bytes - top_overlap; 3166 } else { 3167 size_t bottom_overlap = base[i] + bytes - requested_addr; 3168 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3169 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3170 warning("attempt_reserve_memory_at: possible alignment bug"); 3171 } 3172 unmap_memory(requested_addr, bottom_overlap); 3173 size[i] = bytes - bottom_overlap; 3174 } else { 3175 size[i] = bytes; 3176 } 3177 } 3178 } 3179 } 3180 3181 // Give back the unused reserved pieces. 3182 3183 for (int j = 0; j < i; ++j) { 3184 if (base[j] != NULL) { 3185 unmap_memory(base[j], size[j]); 3186 } 3187 } 3188 3189 return (i < max_tries) ? requested_addr : NULL; 3190 } 3191 3192 bool os::release_memory(char* addr, size_t bytes) { 3193 size_t size = bytes; 3194 return munmap(addr, size) == 0; 3195 } 3196 3197 static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3198 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3199 "addr must be page aligned"); 3200 int retVal = mprotect(addr, bytes, prot); 3201 return retVal == 0; 3202 } 3203 3204 // Protect memory (Used to pass readonly pages through 3205 // JNI GetArray<type>Elements with empty arrays.) 3206 // Also, used for serialization page and for compressed oops null pointer 3207 // checking. 3208 bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3209 bool is_committed) { 3210 unsigned int p = 0; 3211 switch (prot) { 3212 case MEM_PROT_NONE: p = PROT_NONE; break; 3213 case MEM_PROT_READ: p = PROT_READ; break; 3214 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3215 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3216 default: 3217 ShouldNotReachHere(); 3218 } 3219 // is_committed is unused. 3220 return solaris_mprotect(addr, bytes, p); 3221 } 3222 3223 // guard_memory and unguard_memory only happens within stack guard pages. 3224 // Since ISM pertains only to the heap, guard and unguard memory should not 3225 /// happen with an ISM region. 3226 bool os::guard_memory(char* addr, size_t bytes) { 3227 return solaris_mprotect(addr, bytes, PROT_NONE); 3228 } 3229 3230 bool os::unguard_memory(char* addr, size_t bytes) { 3231 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3232 } 3233 3234 // Large page support 3235 3236 // UseLargePages is the master flag to enable/disable large page memory. 3237 // UseMPSS and UseISM are supported for compatibility reasons. Their combined 3238 // effects can be described in the following table: 3239 // 3240 // UseLargePages UseMPSS UseISM 3241 // false * * => UseLargePages is the master switch, turning 3242 // it off will turn off both UseMPSS and 3243 // UseISM. VM will not use large page memory 3244 // regardless the settings of UseMPSS/UseISM. 3245 // true false false => Unless future Solaris provides other 3246 // mechanism to use large page memory, this 3247 // combination is equivalent to -UseLargePages, 3248 // VM will not use large page memory 3249 // true true false => JVM will use MPSS for large page memory. 3250 // This is the default behavior. 3251 // true false true => JVM will use ISM for large page memory. 3252 // true true true => JVM will use ISM if it is available. 3253 // Otherwise, JVM will fall back to MPSS. 3254 // Becaues ISM is now available on all 3255 // supported Solaris versions, this combination 3256 // is equivalent to +UseISM -UseMPSS. 3257 3258 static size_t _large_page_size = 0; 3259 3260 bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3261 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3262 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3263 // can support multiple page sizes. 3264 3265 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3266 // ISM is only recommended on old Solaris where there is no MPSS support. 3267 // Simply choose a conservative value as default. 3268 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3269 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M) 3270 ARM_ONLY(2 * M); 3271 3272 // ISM is available on all supported Solaris versions 3273 return true; 3274 } 3275 3276 // Insertion sort for small arrays (descending order). 3277 static void insertion_sort_descending(size_t* array, int len) { 3278 for (int i = 0; i < len; i++) { 3279 size_t val = array[i]; 3280 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3281 size_t tmp = array[key]; 3282 array[key] = array[key - 1]; 3283 array[key - 1] = tmp; 3284 } 3285 } 3286 } 3287 3288 bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3289 const unsigned int usable_count = VM_Version::page_size_count(); 3290 if (usable_count == 1) { 3291 return false; 3292 } 3293 3294 // Find the right getpagesizes interface. When solaris 11 is the minimum 3295 // build platform, getpagesizes() (without the '2') can be called directly. 3296 typedef int (*gps_t)(size_t[], int); 3297 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3298 if (gps_func == NULL) { 3299 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3300 if (gps_func == NULL) { 3301 if (warn) { 3302 warning("MPSS is not supported by the operating system."); 3303 } 3304 return false; 3305 } 3306 } 3307 3308 // Fill the array of page sizes. 3309 int n = (*gps_func)(_page_sizes, page_sizes_max); 3310 assert(n > 0, "Solaris bug?"); 3311 3312 if (n == page_sizes_max) { 3313 // Add a sentinel value (necessary only if the array was completely filled 3314 // since it is static (zeroed at initialization)). 3315 _page_sizes[--n] = 0; 3316 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3317 } 3318 assert(_page_sizes[n] == 0, "missing sentinel"); 3319 trace_page_sizes("available page sizes", _page_sizes, n); 3320 3321 if (n == 1) return false; // Only one page size available. 3322 3323 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3324 // select up to usable_count elements. First sort the array, find the first 3325 // acceptable value, then copy the usable sizes to the top of the array and 3326 // trim the rest. Make sure to include the default page size :-). 3327 // 3328 // A better policy could get rid of the 4M limit by taking the sizes of the 3329 // important VM memory regions (java heap and possibly the code cache) into 3330 // account. 3331 insertion_sort_descending(_page_sizes, n); 3332 const size_t size_limit = 3333 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3334 int beg; 3335 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3336 const int end = MIN2((int)usable_count, n) - 1; 3337 for (int cur = 0; cur < end; ++cur, ++beg) { 3338 _page_sizes[cur] = _page_sizes[beg]; 3339 } 3340 _page_sizes[end] = vm_page_size(); 3341 _page_sizes[end + 1] = 0; 3342 3343 if (_page_sizes[end] > _page_sizes[end - 1]) { 3344 // Default page size is not the smallest; sort again. 3345 insertion_sort_descending(_page_sizes, end + 1); 3346 } 3347 *page_size = _page_sizes[0]; 3348 3349 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3350 return true; 3351 } 3352 3353 void os::large_page_init() { 3354 if (!UseLargePages) { 3355 UseISM = false; 3356 UseMPSS = false; 3357 return; 3358 } 3359 3360 // print a warning if any large page related flag is specified on command line 3361 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3362 !FLAG_IS_DEFAULT(UseISM) || 3363 !FLAG_IS_DEFAULT(UseMPSS) || 3364 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3365 UseISM = UseISM && 3366 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3367 if (UseISM) { 3368 // ISM disables MPSS to be compatible with old JDK behavior 3369 UseMPSS = false; 3370 _page_sizes[0] = _large_page_size; 3371 _page_sizes[1] = vm_page_size(); 3372 } 3373 3374 UseMPSS = UseMPSS && 3375 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3376 3377 UseLargePages = UseISM || UseMPSS; 3378 } 3379 3380 bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3381 // Signal to OS that we want large pages for addresses 3382 // from addr, addr + bytes 3383 struct memcntl_mha mpss_struct; 3384 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3385 mpss_struct.mha_pagesize = align; 3386 mpss_struct.mha_flags = 0; 3387 if (memcntl(start, bytes, MC_HAT_ADVISE, 3388 (caddr_t) &mpss_struct, 0, 0) < 0) { 3389 debug_only(warning("Attempt to use MPSS failed.")); 3390 return false; 3391 } 3392 return true; 3393 } 3394 3395 char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) { 3396 // "exec" is passed in but not used. Creating the shared image for 3397 // the code cache doesn't have an SHM_X executable permission to check. 3398 assert(UseLargePages && UseISM, "only for ISM large pages"); 3399 3400 size_t size = bytes; 3401 char* retAddr = NULL; 3402 int shmid; 3403 key_t ismKey; 3404 3405 bool warn_on_failure = UseISM && 3406 (!FLAG_IS_DEFAULT(UseLargePages) || 3407 !FLAG_IS_DEFAULT(UseISM) || 3408 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3409 ); 3410 char msg[128]; 3411 3412 ismKey = IPC_PRIVATE; 3413 3414 // Create a large shared memory region to attach to based on size. 3415 // Currently, size is the total size of the heap 3416 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3417 if (shmid == -1){ 3418 if (warn_on_failure) { 3419 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3420 warning(msg); 3421 } 3422 return NULL; 3423 } 3424 3425 // Attach to the region 3426 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3427 int err = errno; 3428 3429 // Remove shmid. If shmat() is successful, the actual shared memory segment 3430 // will be deleted when it's detached by shmdt() or when the process 3431 // terminates. If shmat() is not successful this will remove the shared 3432 // segment immediately. 3433 shmctl(shmid, IPC_RMID, NULL); 3434 3435 if (retAddr == (char *) -1) { 3436 if (warn_on_failure) { 3437 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3438 warning(msg); 3439 } 3440 return NULL; 3441 } 3442 3443 if (UseNUMAInterleaving) { 3444 numa_make_global(retAddr, bytes); 3445 } 3446 return retAddr; 3447 } 3448 3449 bool os::release_memory_special(char* base, size_t bytes) { 3450 // detaching the SHM segment will also delete it, see reserve_memory_special() 3451 int rslt = shmdt(base); 3452 return rslt == 0; 3453 } 3454 3455 size_t os::large_page_size() { 3456 return _large_page_size; 3457 } 3458 3459 // MPSS allows application to commit large page memory on demand; with ISM 3460 // the entire memory region must be allocated as shared memory. 3461 bool os::can_commit_large_page_memory() { 3462 return UseISM ? false : true; 3463 } 3464 3465 bool os::can_execute_large_page_memory() { 3466 return UseISM ? false : true; 3467 } 3468 3469 static int os_sleep(jlong millis, bool interruptible) { 3470 const jlong limit = INT_MAX; 3471 jlong prevtime; 3472 int res; 3473 3474 while (millis > limit) { 3475 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3476 return res; 3477 millis -= limit; 3478 } 3479 3480 // Restart interrupted polls with new parameters until the proper delay 3481 // has been completed. 3482 3483 prevtime = getTimeMillis(); 3484 3485 while (millis > 0) { 3486 jlong newtime; 3487 3488 if (!interruptible) { 3489 // Following assert fails for os::yield_all: 3490 // assert(!thread->is_Java_thread(), "must not be java thread"); 3491 res = poll(NULL, 0, millis); 3492 } else { 3493 JavaThread *jt = JavaThread::current(); 3494 3495 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3496 os::Solaris::clear_interrupted); 3497 } 3498 3499 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3500 // thread.Interrupt. 3501 3502 // See c/r 6751923. Poll can return 0 before time 3503 // has elapsed if time is set via clock_settime (as NTP does). 3504 // res == 0 if poll timed out (see man poll RETURN VALUES) 3505 // using the logic below checks that we really did 3506 // sleep at least "millis" if not we'll sleep again. 3507 if( ( res == 0 ) || ((res == OS_ERR) && (errno == EINTR))) { 3508 newtime = getTimeMillis(); 3509 assert(newtime >= prevtime, "time moving backwards"); 3510 /* Doing prevtime and newtime in microseconds doesn't help precision, 3511 and trying to round up to avoid lost milliseconds can result in a 3512 too-short delay. */ 3513 millis -= newtime - prevtime; 3514 if(millis <= 0) 3515 return OS_OK; 3516 prevtime = newtime; 3517 } else 3518 return res; 3519 } 3520 3521 return OS_OK; 3522 } 3523 3524 // Read calls from inside the vm need to perform state transitions 3525 size_t os::read(int fd, void *buf, unsigned int nBytes) { 3526 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3527 } 3528 3529 size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3530 INTERRUPTIBLE_RETURN_INT(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3531 } 3532 3533 int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3534 assert(thread == Thread::current(), "thread consistency check"); 3535 3536 // TODO-FIXME: this should be removed. 3537 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3538 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3539 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3540 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3541 // is fooled into believing that the system is making progress. In the code below we block the 3542 // the watcher thread while safepoint is in progress so that it would not appear as though the 3543 // system is making progress. 3544 if (!Solaris::T2_libthread() && 3545 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3546 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3547 // the entire safepoint, the watcher thread will line up here during the safepoint. 3548 Threads_lock->lock_without_safepoint_check(); 3549 Threads_lock->unlock(); 3550 } 3551 3552 if (thread->is_Java_thread()) { 3553 // This is a JavaThread so we honor the _thread_blocked protocol 3554 // even for sleeps of 0 milliseconds. This was originally done 3555 // as a workaround for bug 4338139. However, now we also do it 3556 // to honor the suspend-equivalent protocol. 3557 3558 JavaThread *jt = (JavaThread *) thread; 3559 ThreadBlockInVM tbivm(jt); 3560 3561 jt->set_suspend_equivalent(); 3562 // cleared by handle_special_suspend_equivalent_condition() or 3563 // java_suspend_self() via check_and_wait_while_suspended() 3564 3565 int ret_code; 3566 if (millis <= 0) { 3567 thr_yield(); 3568 ret_code = 0; 3569 } else { 3570 // The original sleep() implementation did not create an 3571 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3572 // I'm preserving that decision for now. 3573 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3574 3575 ret_code = os_sleep(millis, interruptible); 3576 } 3577 3578 // were we externally suspended while we were waiting? 3579 jt->check_and_wait_while_suspended(); 3580 3581 return ret_code; 3582 } 3583 3584 // non-JavaThread from this point on: 3585 3586 if (millis <= 0) { 3587 thr_yield(); 3588 return 0; 3589 } 3590 3591 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3592 3593 return os_sleep(millis, interruptible); 3594 } 3595 3596 int os::naked_sleep() { 3597 // %% make the sleep time an integer flag. for now use 1 millisec. 3598 return os_sleep(1, false); 3599 } 3600 3601 // Sleep forever; naked call to OS-specific sleep; use with CAUTION 3602 void os::infinite_sleep() { 3603 while (true) { // sleep forever ... 3604 ::sleep(100); // ... 100 seconds at a time 3605 } 3606 } 3607 3608 // Used to convert frequent JVM_Yield() to nops 3609 bool os::dont_yield() { 3610 if (DontYieldALot) { 3611 static hrtime_t last_time = 0; 3612 hrtime_t diff = getTimeNanos() - last_time; 3613 3614 if (diff < DontYieldALotInterval * 1000000) 3615 return true; 3616 3617 last_time += diff; 3618 3619 return false; 3620 } 3621 else { 3622 return false; 3623 } 3624 } 3625 3626 // Caveat: Solaris os::yield() causes a thread-state transition whereas 3627 // the linux and win32 implementations do not. This should be checked. 3628 3629 void os::yield() { 3630 // Yields to all threads with same or greater priority 3631 os::sleep(Thread::current(), 0, false); 3632 } 3633 3634 // Note that yield semantics are defined by the scheduling class to which 3635 // the thread currently belongs. Typically, yield will _not yield to 3636 // other equal or higher priority threads that reside on the dispatch queues 3637 // of other CPUs. 3638 3639 os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3640 3641 3642 // On Solaris we found that yield_all doesn't always yield to all other threads. 3643 // There have been cases where there is a thread ready to execute but it doesn't 3644 // get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3645 // The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3646 // SIGWAITING signal which will cause a new lwp to be created. So we count the 3647 // number of times yield_all is called in the one loop and increase the sleep 3648 // time after 8 attempts. If this fails too we increase the concurrency level 3649 // so that the starving thread would get an lwp 3650 3651 void os::yield_all(int attempts) { 3652 // Yields to all threads, including threads with lower priorities 3653 if (attempts == 0) { 3654 os::sleep(Thread::current(), 1, false); 3655 } else { 3656 int iterations = attempts % 30; 3657 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3658 // thr_setconcurrency and _getconcurrency make sense only under T1. 3659 int noofLWPS = thr_getconcurrency(); 3660 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3661 thr_setconcurrency(thr_getconcurrency() + 1); 3662 } 3663 } else if (iterations < 25) { 3664 os::sleep(Thread::current(), 1, false); 3665 } else { 3666 os::sleep(Thread::current(), 10, false); 3667 } 3668 } 3669 } 3670 3671 // Called from the tight loops to possibly influence time-sharing heuristics 3672 void os::loop_breaker(int attempts) { 3673 os::yield_all(attempts); 3674 } 3675 3676 3677 // Interface for setting lwp priorities. If we are using T2 libthread, 3678 // which forces the use of BoundThreads or we manually set UseBoundThreads, 3679 // all of our threads will be assigned to real lwp's. Using the thr_setprio 3680 // function is meaningless in this mode so we must adjust the real lwp's priority 3681 // The routines below implement the getting and setting of lwp priorities. 3682 // 3683 // Note: There are three priority scales used on Solaris. Java priotities 3684 // which range from 1 to 10, libthread "thr_setprio" scale which range 3685 // from 0 to 127, and the current scheduling class of the process we 3686 // are running in. This is typically from -60 to +60. 3687 // The setting of the lwp priorities in done after a call to thr_setprio 3688 // so Java priorities are mapped to libthread priorities and we map from 3689 // the latter to lwp priorities. We don't keep priorities stored in 3690 // Java priorities since some of our worker threads want to set priorities 3691 // higher than all Java threads. 3692 // 3693 // For related information: 3694 // (1) man -s 2 priocntl 3695 // (2) man -s 4 priocntl 3696 // (3) man dispadmin 3697 // = librt.so 3698 // = libthread/common/rtsched.c - thrp_setlwpprio(). 3699 // = ps -cL <pid> ... to validate priority. 3700 // = sched_get_priority_min and _max 3701 // pthread_create 3702 // sched_setparam 3703 // pthread_setschedparam 3704 // 3705 // Assumptions: 3706 // + We assume that all threads in the process belong to the same 3707 // scheduling class. IE. an homogenous process. 3708 // + Must be root or in IA group to change change "interactive" attribute. 3709 // Priocntl() will fail silently. The only indication of failure is when 3710 // we read-back the value and notice that it hasn't changed. 3711 // + Interactive threads enter the runq at the head, non-interactive at the tail. 3712 // + For RT, change timeslice as well. Invariant: 3713 // constant "priority integral" 3714 // Konst == TimeSlice * (60-Priority) 3715 // Given a priority, compute appropriate timeslice. 3716 // + Higher numerical values have higher priority. 3717 3718 // sched class attributes 3719 typedef struct { 3720 int schedPolicy; // classID 3721 int maxPrio; 3722 int minPrio; 3723 } SchedInfo; 3724 3725 3726 static SchedInfo tsLimits, iaLimits, rtLimits; 3727 3728 #ifdef ASSERT 3729 static int ReadBackValidate = 1; 3730 #endif 3731 static int myClass = 0; 3732 static int myMin = 0; 3733 static int myMax = 0; 3734 static int myCur = 0; 3735 static bool priocntl_enable = false; 3736 3737 3738 // Call the version of priocntl suitable for all supported versions 3739 // of Solaris. We need to call through this wrapper so that we can 3740 // build on Solaris 9 and run on Solaris 8, 9 and 10. 3741 // 3742 // This code should be removed if we ever stop supporting Solaris 8 3743 // and earlier releases. 3744 3745 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3746 typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3747 static priocntl_type priocntl_ptr = priocntl_stub; 3748 3749 // Stub to set the value of the real pointer, and then call the real 3750 // function. 3751 3752 static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3753 // Try Solaris 8- name only. 3754 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3755 guarantee(tmp != NULL, "priocntl function not found."); 3756 priocntl_ptr = tmp; 3757 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3758 } 3759 3760 3761 // lwp_priocntl_init 3762 // 3763 // Try to determine the priority scale for our process. 3764 // 3765 // Return errno or 0 if OK. 3766 // 3767 static 3768 int lwp_priocntl_init () 3769 { 3770 int rslt; 3771 pcinfo_t ClassInfo; 3772 pcparms_t ParmInfo; 3773 int i; 3774 3775 if (!UseThreadPriorities) return 0; 3776 3777 // We are using Bound threads, we need to determine our priority ranges 3778 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3779 // If ThreadPriorityPolicy is 1, switch tables 3780 if (ThreadPriorityPolicy == 1) { 3781 for (i = 0 ; i < MaxPriority+1; i++) 3782 os::java_to_os_priority[i] = prio_policy1[i]; 3783 } 3784 } 3785 // Not using Bound Threads, set to ThreadPolicy 1 3786 else { 3787 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3788 os::java_to_os_priority[i] = prio_policy1[i]; 3789 } 3790 return 0; 3791 } 3792 3793 3794 // Get IDs for a set of well-known scheduling classes. 3795 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3796 // the system. We should have a loop that iterates over the 3797 // classID values, which are known to be "small" integers. 3798 3799 strcpy(ClassInfo.pc_clname, "TS"); 3800 ClassInfo.pc_cid = -1; 3801 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3802 if (rslt < 0) return errno; 3803 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3804 tsLimits.schedPolicy = ClassInfo.pc_cid; 3805 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3806 tsLimits.minPrio = -tsLimits.maxPrio; 3807 3808 strcpy(ClassInfo.pc_clname, "IA"); 3809 ClassInfo.pc_cid = -1; 3810 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3811 if (rslt < 0) return errno; 3812 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3813 iaLimits.schedPolicy = ClassInfo.pc_cid; 3814 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3815 iaLimits.minPrio = -iaLimits.maxPrio; 3816 3817 strcpy(ClassInfo.pc_clname, "RT"); 3818 ClassInfo.pc_cid = -1; 3819 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3820 if (rslt < 0) return errno; 3821 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3822 rtLimits.schedPolicy = ClassInfo.pc_cid; 3823 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3824 rtLimits.minPrio = 0; 3825 3826 3827 // Query our "current" scheduling class. 3828 // This will normally be IA,TS or, rarely, RT. 3829 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3830 ParmInfo.pc_cid = PC_CLNULL; 3831 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3832 if ( rslt < 0 ) return errno; 3833 myClass = ParmInfo.pc_cid; 3834 3835 // We now know our scheduling classId, get specific information 3836 // the class. 3837 ClassInfo.pc_cid = myClass; 3838 ClassInfo.pc_clname[0] = 0; 3839 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3840 if ( rslt < 0 ) return errno; 3841 3842 if (ThreadPriorityVerbose) 3843 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3844 3845 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3846 ParmInfo.pc_cid = PC_CLNULL; 3847 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3848 if (rslt < 0) return errno; 3849 3850 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3851 myMin = rtLimits.minPrio; 3852 myMax = rtLimits.maxPrio; 3853 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3854 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3855 myMin = iaLimits.minPrio; 3856 myMax = iaLimits.maxPrio; 3857 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3858 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3859 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3860 myMin = tsLimits.minPrio; 3861 myMax = tsLimits.maxPrio; 3862 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3863 } else { 3864 // No clue - punt 3865 if (ThreadPriorityVerbose) 3866 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3867 return EINVAL; // no clue, punt 3868 } 3869 3870 if (ThreadPriorityVerbose) 3871 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3872 3873 priocntl_enable = true; // Enable changing priorities 3874 return 0; 3875 } 3876 3877 #define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3878 #define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3879 #define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3880 3881 3882 // scale_to_lwp_priority 3883 // 3884 // Convert from the libthread "thr_setprio" scale to our current 3885 // lwp scheduling class scale. 3886 // 3887 static 3888 int scale_to_lwp_priority (int rMin, int rMax, int x) 3889 { 3890 int v; 3891 3892 if (x == 127) return rMax; // avoid round-down 3893 v = (((x*(rMax-rMin)))/128)+rMin; 3894 return v; 3895 } 3896 3897 3898 // set_lwp_priority 3899 // 3900 // Set the priority of the lwp. This call should only be made 3901 // when using bound threads (T2 threads are bound by default). 3902 // 3903 int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3904 { 3905 int rslt; 3906 int Actual, Expected, prv; 3907 pcparms_t ParmInfo; // for GET-SET 3908 #ifdef ASSERT 3909 pcparms_t ReadBack; // for readback 3910 #endif 3911 3912 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3913 // Query current values. 3914 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3915 // Cache "pcparms_t" in global ParmCache. 3916 // TODO: elide set-to-same-value 3917 3918 // If something went wrong on init, don't change priorities. 3919 if ( !priocntl_enable ) { 3920 if (ThreadPriorityVerbose) 3921 tty->print_cr("Trying to set priority but init failed, ignoring"); 3922 return EINVAL; 3923 } 3924 3925 3926 // If lwp hasn't started yet, just return 3927 // the _start routine will call us again. 3928 if ( lwpid <= 0 ) { 3929 if (ThreadPriorityVerbose) { 3930 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3931 ThreadID, newPrio); 3932 } 3933 return 0; 3934 } 3935 3936 if (ThreadPriorityVerbose) { 3937 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3938 ThreadID, lwpid, newPrio); 3939 } 3940 3941 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3942 ParmInfo.pc_cid = PC_CLNULL; 3943 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3944 if (rslt < 0) return errno; 3945 3946 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3947 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3948 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3949 rtInfo->rt_tqsecs = RT_NOCHANGE; 3950 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3951 if (ThreadPriorityVerbose) { 3952 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3953 } 3954 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3955 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3956 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3957 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3958 iaInfo->ia_uprilim = IA_NOCHANGE; 3959 iaInfo->ia_mode = IA_NOCHANGE; 3960 if (ThreadPriorityVerbose) { 3961 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3962 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3963 } 3964 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3965 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3966 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3967 prv = tsInfo->ts_upri; 3968 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3969 tsInfo->ts_uprilim = IA_NOCHANGE; 3970 if (ThreadPriorityVerbose) { 3971 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3972 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3973 } 3974 if (prv == tsInfo->ts_upri) return 0; 3975 } else { 3976 if ( ThreadPriorityVerbose ) { 3977 tty->print_cr ("Unknown scheduling class\n"); 3978 } 3979 return EINVAL; // no clue, punt 3980 } 3981 3982 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3983 if (ThreadPriorityVerbose && rslt) { 3984 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3985 } 3986 if (rslt < 0) return errno; 3987 3988 #ifdef ASSERT 3989 // Sanity check: read back what we just attempted to set. 3990 // In theory it could have changed in the interim ... 3991 // 3992 // The priocntl system call is tricky. 3993 // Sometimes it'll validate the priority value argument and 3994 // return EINVAL if unhappy. At other times it fails silently. 3995 // Readbacks are prudent. 3996 3997 if (!ReadBackValidate) return 0; 3998 3999 memset(&ReadBack, 0, sizeof(pcparms_t)); 4000 ReadBack.pc_cid = PC_CLNULL; 4001 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 4002 assert(rslt >= 0, "priocntl failed"); 4003 Actual = Expected = 0xBAD; 4004 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 4005 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 4006 Actual = RTPRI(ReadBack)->rt_pri; 4007 Expected = RTPRI(ParmInfo)->rt_pri; 4008 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 4009 Actual = IAPRI(ReadBack)->ia_upri; 4010 Expected = IAPRI(ParmInfo)->ia_upri; 4011 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 4012 Actual = TSPRI(ReadBack)->ts_upri; 4013 Expected = TSPRI(ParmInfo)->ts_upri; 4014 } else { 4015 if ( ThreadPriorityVerbose ) { 4016 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 4017 } 4018 } 4019 4020 if (Actual != Expected) { 4021 if ( ThreadPriorityVerbose ) { 4022 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 4023 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 4024 } 4025 } 4026 #endif 4027 4028 return 0; 4029 } 4030 4031 4032 4033 // Solaris only gives access to 128 real priorities at a time, 4034 // so we expand Java's ten to fill this range. This would be better 4035 // if we dynamically adjusted relative priorities. 4036 // 4037 // The ThreadPriorityPolicy option allows us to select 2 different 4038 // priority scales. 4039 // 4040 // ThreadPriorityPolicy=0 4041 // Since the Solaris' default priority is MaximumPriority, we do not 4042 // set a priority lower than Max unless a priority lower than 4043 // NormPriority is requested. 4044 // 4045 // ThreadPriorityPolicy=1 4046 // This mode causes the priority table to get filled with 4047 // linear values. NormPriority get's mapped to 50% of the 4048 // Maximum priority an so on. This will cause VM threads 4049 // to get unfair treatment against other Solaris processes 4050 // which do not explicitly alter their thread priorities. 4051 // 4052 4053 4054 int os::java_to_os_priority[MaxPriority + 1] = { 4055 -99999, // 0 Entry should never be used 4056 4057 0, // 1 MinPriority 4058 32, // 2 4059 64, // 3 4060 4061 96, // 4 4062 127, // 5 NormPriority 4063 127, // 6 4064 4065 127, // 7 4066 127, // 8 4067 127, // 9 NearMaxPriority 4068 4069 127 // 10 MaxPriority 4070 }; 4071 4072 4073 OSReturn os::set_native_priority(Thread* thread, int newpri) { 4074 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 4075 if ( !UseThreadPriorities ) return OS_OK; 4076 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 4077 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 4078 status |= (set_lwp_priority (thread->osthread()->thread_id(), 4079 thread->osthread()->lwp_id(), newpri )); 4080 return (status == 0) ? OS_OK : OS_ERR; 4081 } 4082 4083 4084 OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 4085 int p; 4086 if ( !UseThreadPriorities ) { 4087 *priority_ptr = NormalPriority; 4088 return OS_OK; 4089 } 4090 int status = thr_getprio(thread->osthread()->thread_id(), &p); 4091 if (status != 0) { 4092 return OS_ERR; 4093 } 4094 *priority_ptr = p; 4095 return OS_OK; 4096 } 4097 4098 4099 // Hint to the underlying OS that a task switch would not be good. 4100 // Void return because it's a hint and can fail. 4101 void os::hint_no_preempt() { 4102 schedctl_start(schedctl_init()); 4103 } 4104 4105 void os::interrupt(Thread* thread) { 4106 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4107 4108 OSThread* osthread = thread->osthread(); 4109 4110 int isInterrupted = osthread->interrupted(); 4111 if (!isInterrupted) { 4112 osthread->set_interrupted(true); 4113 OrderAccess::fence(); 4114 // os::sleep() is implemented with either poll (NULL,0,timeout) or 4115 // by parking on _SleepEvent. If the former, thr_kill will unwedge 4116 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 4117 ParkEvent * const slp = thread->_SleepEvent ; 4118 if (slp != NULL) slp->unpark() ; 4119 } 4120 4121 // For JSR166: unpark after setting status but before thr_kill -dl 4122 if (thread->is_Java_thread()) { 4123 ((JavaThread*)thread)->parker()->unpark(); 4124 } 4125 4126 // Handle interruptible wait() ... 4127 ParkEvent * const ev = thread->_ParkEvent ; 4128 if (ev != NULL) ev->unpark() ; 4129 4130 // When events are used everywhere for os::sleep, then this thr_kill 4131 // will only be needed if UseVMInterruptibleIO is true. 4132 4133 if (!isInterrupted) { 4134 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 4135 assert_status(status == 0, status, "thr_kill"); 4136 4137 // Bump thread interruption counter 4138 RuntimeService::record_thread_interrupt_signaled_count(); 4139 } 4140 } 4141 4142 4143 bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 4144 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 4145 4146 OSThread* osthread = thread->osthread(); 4147 4148 bool res = osthread->interrupted(); 4149 4150 // NOTE that since there is no "lock" around these two operations, 4151 // there is the possibility that the interrupted flag will be 4152 // "false" but that the interrupt event will be set. This is 4153 // intentional. The effect of this is that Object.wait() will appear 4154 // to have a spurious wakeup, which is not harmful, and the 4155 // possibility is so rare that it is not worth the added complexity 4156 // to add yet another lock. It has also been recommended not to put 4157 // the interrupted flag into the os::Solaris::Event structure, 4158 // because it hides the issue. 4159 if (res && clear_interrupted) { 4160 osthread->set_interrupted(false); 4161 } 4162 return res; 4163 } 4164 4165 4166 void os::print_statistics() { 4167 } 4168 4169 int os::message_box(const char* title, const char* message) { 4170 int i; 4171 fdStream err(defaultStream::error_fd()); 4172 for (i = 0; i < 78; i++) err.print_raw("="); 4173 err.cr(); 4174 err.print_raw_cr(title); 4175 for (i = 0; i < 78; i++) err.print_raw("-"); 4176 err.cr(); 4177 err.print_raw_cr(message); 4178 for (i = 0; i < 78; i++) err.print_raw("="); 4179 err.cr(); 4180 4181 char buf[16]; 4182 // Prevent process from exiting upon "read error" without consuming all CPU 4183 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 4184 4185 return buf[0] == 'y' || buf[0] == 'Y'; 4186 } 4187 4188 // A lightweight implementation that does not suspend the target thread and 4189 // thus returns only a hint. Used for profiling only! 4190 ExtendedPC os::get_thread_pc(Thread* thread) { 4191 // Make sure that it is called by the watcher and the Threads lock is owned. 4192 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4193 // For now, is only used to profile the VM Thread 4194 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4195 ExtendedPC epc; 4196 4197 GetThreadPC_Callback cb(ProfileVM_lock); 4198 OSThread *osthread = thread->osthread(); 4199 const int time_to_wait = 400; // 400ms wait for initial response 4200 int status = cb.interrupt(thread, time_to_wait); 4201 4202 if (cb.is_done() ) { 4203 epc = cb.addr(); 4204 } else { 4205 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4206 osthread->thread_id(), status);); 4207 // epc is already NULL 4208 } 4209 return epc; 4210 } 4211 4212 4213 // This does not do anything on Solaris. This is basically a hook for being 4214 // able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4215 void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4216 f(value, method, args, thread); 4217 } 4218 4219 // This routine may be used by user applications as a "hook" to catch signals. 4220 // The user-defined signal handler must pass unrecognized signals to this 4221 // routine, and if it returns true (non-zero), then the signal handler must 4222 // return immediately. If the flag "abort_if_unrecognized" is true, then this 4223 // routine will never retun false (zero), but instead will execute a VM panic 4224 // routine kill the process. 4225 // 4226 // If this routine returns false, it is OK to call it again. This allows 4227 // the user-defined signal handler to perform checks either before or after 4228 // the VM performs its own checks. Naturally, the user code would be making 4229 // a serious error if it tried to handle an exception (such as a null check 4230 // or breakpoint) that the VM was generating for its own correct operation. 4231 // 4232 // This routine may recognize any of the following kinds of signals: 4233 // SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4234 // os::Solaris::SIGasync 4235 // It should be consulted by handlers for any of those signals. 4236 // It explicitly does not recognize os::Solaris::SIGinterrupt 4237 // 4238 // The caller of this routine must pass in the three arguments supplied 4239 // to the function referred to in the "sa_sigaction" (not the "sa_handler") 4240 // field of the structure passed to sigaction(). This routine assumes that 4241 // the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4242 // 4243 // Note that the VM will print warnings if it detects conflicting signal 4244 // handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4245 // 4246 extern "C" JNIEXPORT int 4247 JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, 4248 int abort_if_unrecognized); 4249 4250 4251 void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4252 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4253 } 4254 4255 /* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4256 is needed to provoke threads blocked on IO to return an EINTR 4257 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4258 does NOT participate in signal chaining due to requirement for 4259 NOT setting SA_RESTART to make EINTR work. */ 4260 extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4261 if (UseSignalChaining) { 4262 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4263 if (actp && actp->sa_handler) { 4264 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4265 } 4266 } 4267 } 4268 4269 // This boolean allows users to forward their own non-matching signals 4270 // to JVM_handle_solaris_signal, harmlessly. 4271 bool os::Solaris::signal_handlers_are_installed = false; 4272 4273 // For signal-chaining 4274 bool os::Solaris::libjsig_is_loaded = false; 4275 typedef struct sigaction *(*get_signal_t)(int); 4276 get_signal_t os::Solaris::get_signal_action = NULL; 4277 4278 struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4279 struct sigaction *actp = NULL; 4280 4281 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4282 // Retrieve the old signal handler from libjsig 4283 actp = (*get_signal_action)(sig); 4284 } 4285 if (actp == NULL) { 4286 // Retrieve the preinstalled signal handler from jvm 4287 actp = get_preinstalled_handler(sig); 4288 } 4289 4290 return actp; 4291 } 4292 4293 static bool call_chained_handler(struct sigaction *actp, int sig, 4294 siginfo_t *siginfo, void *context) { 4295 // Call the old signal handler 4296 if (actp->sa_handler == SIG_DFL) { 4297 // It's more reasonable to let jvm treat it as an unexpected exception 4298 // instead of taking the default action. 4299 return false; 4300 } else if (actp->sa_handler != SIG_IGN) { 4301 if ((actp->sa_flags & SA_NODEFER) == 0) { 4302 // automaticlly block the signal 4303 sigaddset(&(actp->sa_mask), sig); 4304 } 4305 4306 sa_handler_t hand; 4307 sa_sigaction_t sa; 4308 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4309 // retrieve the chained handler 4310 if (siginfo_flag_set) { 4311 sa = actp->sa_sigaction; 4312 } else { 4313 hand = actp->sa_handler; 4314 } 4315 4316 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4317 actp->sa_handler = SIG_DFL; 4318 } 4319 4320 // try to honor the signal mask 4321 sigset_t oset; 4322 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4323 4324 // call into the chained handler 4325 if (siginfo_flag_set) { 4326 (*sa)(sig, siginfo, context); 4327 } else { 4328 (*hand)(sig); 4329 } 4330 4331 // restore the signal mask 4332 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4333 } 4334 // Tell jvm's signal handler the signal is taken care of. 4335 return true; 4336 } 4337 4338 bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4339 bool chained = false; 4340 // signal-chaining 4341 if (UseSignalChaining) { 4342 struct sigaction *actp = get_chained_signal_action(sig); 4343 if (actp != NULL) { 4344 chained = call_chained_handler(actp, sig, siginfo, context); 4345 } 4346 } 4347 return chained; 4348 } 4349 4350 struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4351 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4352 if (preinstalled_sigs[sig] != 0) { 4353 return &chainedsigactions[sig]; 4354 } 4355 return NULL; 4356 } 4357 4358 void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4359 4360 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4361 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4362 chainedsigactions[sig] = oldAct; 4363 preinstalled_sigs[sig] = 1; 4364 } 4365 4366 void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4367 // Check for overwrite. 4368 struct sigaction oldAct; 4369 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4370 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4371 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4372 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4373 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4374 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4375 if (AllowUserSignalHandlers || !set_installed) { 4376 // Do not overwrite; user takes responsibility to forward to us. 4377 return; 4378 } else if (UseSignalChaining) { 4379 if (oktochain) { 4380 // save the old handler in jvm 4381 save_preinstalled_handler(sig, oldAct); 4382 } else { 4383 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4384 } 4385 // libjsig also interposes the sigaction() call below and saves the 4386 // old sigaction on it own. 4387 } else { 4388 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4389 "%#lx for signal %d.", (long)oldhand, sig)); 4390 } 4391 } 4392 4393 struct sigaction sigAct; 4394 sigfillset(&(sigAct.sa_mask)); 4395 sigAct.sa_handler = SIG_DFL; 4396 4397 sigAct.sa_sigaction = signalHandler; 4398 // Handle SIGSEGV on alternate signal stack if 4399 // not using stack banging 4400 if (!UseStackBanging && sig == SIGSEGV) { 4401 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4402 // Interruptible i/o requires SA_RESTART cleared so EINTR 4403 // is returned instead of restarting system calls 4404 } else if (sig == os::Solaris::SIGinterrupt()) { 4405 sigemptyset(&sigAct.sa_mask); 4406 sigAct.sa_handler = NULL; 4407 sigAct.sa_flags = SA_SIGINFO; 4408 sigAct.sa_sigaction = sigINTRHandler; 4409 } else { 4410 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4411 } 4412 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4413 4414 sigaction(sig, &sigAct, &oldAct); 4415 4416 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4417 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4418 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4419 } 4420 4421 4422 #define DO_SIGNAL_CHECK(sig) \ 4423 if (!sigismember(&check_signal_done, sig)) \ 4424 os::Solaris::check_signal_handler(sig) 4425 4426 // This method is a periodic task to check for misbehaving JNI applications 4427 // under CheckJNI, we can add any periodic checks here 4428 4429 void os::run_periodic_checks() { 4430 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4431 // thereby preventing a NULL checks. 4432 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4433 4434 if (check_signals == false) return; 4435 4436 // SEGV and BUS if overridden could potentially prevent 4437 // generation of hs*.log in the event of a crash, debugging 4438 // such a case can be very challenging, so we absolutely 4439 // check for the following for a good measure: 4440 DO_SIGNAL_CHECK(SIGSEGV); 4441 DO_SIGNAL_CHECK(SIGILL); 4442 DO_SIGNAL_CHECK(SIGFPE); 4443 DO_SIGNAL_CHECK(SIGBUS); 4444 DO_SIGNAL_CHECK(SIGPIPE); 4445 DO_SIGNAL_CHECK(SIGXFSZ); 4446 4447 // ReduceSignalUsage allows the user to override these handlers 4448 // see comments at the very top and jvm_solaris.h 4449 if (!ReduceSignalUsage) { 4450 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4451 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4452 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4453 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4454 } 4455 4456 // See comments above for using JVM1/JVM2 and UseAltSigs 4457 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4458 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4459 4460 } 4461 4462 typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4463 4464 static os_sigaction_t os_sigaction = NULL; 4465 4466 void os::Solaris::check_signal_handler(int sig) { 4467 char buf[O_BUFLEN]; 4468 address jvmHandler = NULL; 4469 4470 struct sigaction act; 4471 if (os_sigaction == NULL) { 4472 // only trust the default sigaction, in case it has been interposed 4473 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4474 if (os_sigaction == NULL) return; 4475 } 4476 4477 os_sigaction(sig, (struct sigaction*)NULL, &act); 4478 4479 address thisHandler = (act.sa_flags & SA_SIGINFO) 4480 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4481 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4482 4483 4484 switch(sig) { 4485 case SIGSEGV: 4486 case SIGBUS: 4487 case SIGFPE: 4488 case SIGPIPE: 4489 case SIGXFSZ: 4490 case SIGILL: 4491 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4492 break; 4493 4494 case SHUTDOWN1_SIGNAL: 4495 case SHUTDOWN2_SIGNAL: 4496 case SHUTDOWN3_SIGNAL: 4497 case BREAK_SIGNAL: 4498 jvmHandler = (address)user_handler(); 4499 break; 4500 4501 default: 4502 int intrsig = os::Solaris::SIGinterrupt(); 4503 int asynsig = os::Solaris::SIGasync(); 4504 4505 if (sig == intrsig) { 4506 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4507 } else if (sig == asynsig) { 4508 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4509 } else { 4510 return; 4511 } 4512 break; 4513 } 4514 4515 4516 if (thisHandler != jvmHandler) { 4517 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4518 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4519 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4520 // No need to check this sig any longer 4521 sigaddset(&check_signal_done, sig); 4522 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4523 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4524 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4525 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4526 // No need to check this sig any longer 4527 sigaddset(&check_signal_done, sig); 4528 } 4529 4530 // Print all the signal handler state 4531 if (sigismember(&check_signal_done, sig)) { 4532 print_signal_handlers(tty, buf, O_BUFLEN); 4533 } 4534 4535 } 4536 4537 void os::Solaris::install_signal_handlers() { 4538 bool libjsigdone = false; 4539 signal_handlers_are_installed = true; 4540 4541 // signal-chaining 4542 typedef void (*signal_setting_t)(); 4543 signal_setting_t begin_signal_setting = NULL; 4544 signal_setting_t end_signal_setting = NULL; 4545 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4546 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4547 if (begin_signal_setting != NULL) { 4548 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4549 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4550 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4551 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4552 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4553 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4554 libjsig_is_loaded = true; 4555 if (os::Solaris::get_libjsig_version != NULL) { 4556 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4557 } 4558 assert(UseSignalChaining, "should enable signal-chaining"); 4559 } 4560 if (libjsig_is_loaded) { 4561 // Tell libjsig jvm is setting signal handlers 4562 (*begin_signal_setting)(); 4563 } 4564 4565 set_signal_handler(SIGSEGV, true, true); 4566 set_signal_handler(SIGPIPE, true, true); 4567 set_signal_handler(SIGXFSZ, true, true); 4568 set_signal_handler(SIGBUS, true, true); 4569 set_signal_handler(SIGILL, true, true); 4570 set_signal_handler(SIGFPE, true, true); 4571 4572 4573 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4574 4575 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4576 // can not register overridable signals which might be > 32 4577 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4578 // Tell libjsig jvm has finished setting signal handlers 4579 (*end_signal_setting)(); 4580 libjsigdone = true; 4581 } 4582 } 4583 4584 // Never ok to chain our SIGinterrupt 4585 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4586 set_signal_handler(os::Solaris::SIGasync(), true, true); 4587 4588 if (libjsig_is_loaded && !libjsigdone) { 4589 // Tell libjsig jvm finishes setting signal handlers 4590 (*end_signal_setting)(); 4591 } 4592 4593 // We don't activate signal checker if libjsig is in place, we trust ourselves 4594 // and if UserSignalHandler is installed all bets are off 4595 if (CheckJNICalls) { 4596 if (libjsig_is_loaded) { 4597 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4598 check_signals = false; 4599 } 4600 if (AllowUserSignalHandlers) { 4601 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4602 check_signals = false; 4603 } 4604 } 4605 } 4606 4607 4608 void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4609 4610 const char * signames[] = { 4611 "SIG0", 4612 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4613 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4614 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4615 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4616 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4617 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4618 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4619 "SIGCANCEL", "SIGLOST" 4620 }; 4621 4622 const char* os::exception_name(int exception_code, char* buf, size_t size) { 4623 if (0 < exception_code && exception_code <= SIGRTMAX) { 4624 // signal 4625 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4626 jio_snprintf(buf, size, "%s", signames[exception_code]); 4627 } else { 4628 jio_snprintf(buf, size, "SIG%d", exception_code); 4629 } 4630 return buf; 4631 } else { 4632 return NULL; 4633 } 4634 } 4635 4636 // (Static) wrappers for the new libthread API 4637 int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4638 int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4639 int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4640 int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4641 int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4642 4643 // (Static) wrapper for getisax(2) call. 4644 os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4645 4646 // (Static) wrappers for the liblgrp API 4647 os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4648 os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4649 os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4650 os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4651 os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4652 os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4653 os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4654 os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4655 os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4656 4657 // (Static) wrapper for meminfo() call. 4658 os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4659 4660 static address resolve_symbol_lazy(const char* name) { 4661 address addr = (address) dlsym(RTLD_DEFAULT, name); 4662 if(addr == NULL) { 4663 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4664 addr = (address) dlsym(RTLD_NEXT, name); 4665 } 4666 return addr; 4667 } 4668 4669 static address resolve_symbol(const char* name) { 4670 address addr = resolve_symbol_lazy(name); 4671 if(addr == NULL) { 4672 fatal(dlerror()); 4673 } 4674 return addr; 4675 } 4676 4677 4678 4679 // isT2_libthread() 4680 // 4681 // Routine to determine if we are currently using the new T2 libthread. 4682 // 4683 // We determine if we are using T2 by reading /proc/self/lstatus and 4684 // looking for a thread with the ASLWP bit set. If we find this status 4685 // bit set, we must assume that we are NOT using T2. The T2 team 4686 // has approved this algorithm. 4687 // 4688 // We need to determine if we are running with the new T2 libthread 4689 // since setting native thread priorities is handled differently 4690 // when using this library. All threads created using T2 are bound 4691 // threads. Calling thr_setprio is meaningless in this case. 4692 // 4693 bool isT2_libthread() { 4694 static prheader_t * lwpArray = NULL; 4695 static int lwpSize = 0; 4696 static int lwpFile = -1; 4697 lwpstatus_t * that; 4698 char lwpName [128]; 4699 bool isT2 = false; 4700 4701 #define ADR(x) ((uintptr_t)(x)) 4702 #define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4703 4704 lwpFile = ::open("/proc/self/lstatus", O_RDONLY, 0); 4705 if (lwpFile < 0) { 4706 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4707 return false; 4708 } 4709 lwpSize = 16*1024; 4710 for (;;) { 4711 ::lseek64 (lwpFile, 0, SEEK_SET); 4712 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4713 if (::read(lwpFile, lwpArray, lwpSize) < 0) { 4714 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4715 break; 4716 } 4717 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4718 // We got a good snapshot - now iterate over the list. 4719 int aslwpcount = 0; 4720 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4721 that = LWPINDEX(lwpArray,i); 4722 if (that->pr_flags & PR_ASLWP) { 4723 aslwpcount++; 4724 } 4725 } 4726 if (aslwpcount == 0) isT2 = true; 4727 break; 4728 } 4729 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4730 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4731 } 4732 4733 FREE_C_HEAP_ARRAY(char, lwpArray); 4734 ::close (lwpFile); 4735 if (ThreadPriorityVerbose) { 4736 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4737 else tty->print_cr("We are not running with a T2 libthread\n"); 4738 } 4739 return isT2; 4740 } 4741 4742 4743 void os::Solaris::libthread_init() { 4744 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4745 4746 // Determine if we are running with the new T2 libthread 4747 os::Solaris::set_T2_libthread(isT2_libthread()); 4748 4749 lwp_priocntl_init(); 4750 4751 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4752 if(func == NULL) { 4753 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4754 // Guarantee that this VM is running on an new enough OS (5.6 or 4755 // later) that it will have a new enough libthread.so. 4756 guarantee(func != NULL, "libthread.so is too old."); 4757 } 4758 4759 // Initialize the new libthread getstate API wrappers 4760 func = resolve_symbol("thr_getstate"); 4761 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4762 4763 func = resolve_symbol("thr_setstate"); 4764 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4765 4766 func = resolve_symbol("thr_setmutator"); 4767 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4768 4769 func = resolve_symbol("thr_suspend_mutator"); 4770 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4771 4772 func = resolve_symbol("thr_continue_mutator"); 4773 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4774 4775 int size; 4776 void (*handler_info_func)(address *, int *); 4777 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4778 handler_info_func(&handler_start, &size); 4779 handler_end = handler_start + size; 4780 } 4781 4782 4783 int_fnP_mutex_tP os::Solaris::_mutex_lock; 4784 int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4785 int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4786 int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4787 int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4788 int os::Solaris::_mutex_scope = USYNC_THREAD; 4789 4790 int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4791 int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4792 int_fnP_cond_tP os::Solaris::_cond_signal; 4793 int_fnP_cond_tP os::Solaris::_cond_broadcast; 4794 int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4795 int_fnP_cond_tP os::Solaris::_cond_destroy; 4796 int os::Solaris::_cond_scope = USYNC_THREAD; 4797 4798 void os::Solaris::synchronization_init() { 4799 if(UseLWPSynchronization) { 4800 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4801 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4802 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4803 os::Solaris::set_mutex_init(lwp_mutex_init); 4804 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4805 os::Solaris::set_mutex_scope(USYNC_THREAD); 4806 4807 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4808 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4809 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4810 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4811 os::Solaris::set_cond_init(lwp_cond_init); 4812 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4813 os::Solaris::set_cond_scope(USYNC_THREAD); 4814 } 4815 else { 4816 os::Solaris::set_mutex_scope(USYNC_THREAD); 4817 os::Solaris::set_cond_scope(USYNC_THREAD); 4818 4819 if(UsePthreads) { 4820 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4821 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4822 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4823 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4824 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4825 4826 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4827 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4828 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4829 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4830 os::Solaris::set_cond_init(pthread_cond_default_init); 4831 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4832 } 4833 else { 4834 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4835 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4836 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4837 os::Solaris::set_mutex_init(::mutex_init); 4838 os::Solaris::set_mutex_destroy(::mutex_destroy); 4839 4840 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4841 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4842 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4843 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4844 os::Solaris::set_cond_init(::cond_init); 4845 os::Solaris::set_cond_destroy(::cond_destroy); 4846 } 4847 } 4848 } 4849 4850 bool os::Solaris::liblgrp_init() { 4851 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4852 if (handle != NULL) { 4853 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4854 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4855 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4856 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4857 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4858 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4859 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4860 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4861 dlsym(handle, "lgrp_cookie_stale"))); 4862 4863 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4864 set_lgrp_cookie(c); 4865 return true; 4866 } 4867 return false; 4868 } 4869 4870 void os::Solaris::misc_sym_init() { 4871 address func; 4872 4873 // getisax 4874 func = resolve_symbol_lazy("getisax"); 4875 if (func != NULL) { 4876 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4877 } 4878 4879 // meminfo 4880 func = resolve_symbol_lazy("meminfo"); 4881 if (func != NULL) { 4882 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4883 } 4884 } 4885 4886 uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4887 assert(_getisax != NULL, "_getisax not set"); 4888 return _getisax(array, n); 4889 } 4890 4891 // Symbol doesn't exist in Solaris 8 pset.h 4892 #ifndef PS_MYID 4893 #define PS_MYID -3 4894 #endif 4895 4896 // int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4897 typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4898 static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4899 4900 void init_pset_getloadavg_ptr(void) { 4901 pset_getloadavg_ptr = 4902 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4903 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4904 warning("pset_getloadavg function not found"); 4905 } 4906 } 4907 4908 int os::Solaris::_dev_zero_fd = -1; 4909 4910 // this is called _before_ the global arguments have been parsed 4911 void os::init(void) { 4912 _initial_pid = getpid(); 4913 4914 max_hrtime = first_hrtime = gethrtime(); 4915 4916 init_random(1234567); 4917 4918 page_size = sysconf(_SC_PAGESIZE); 4919 if (page_size == -1) 4920 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4921 strerror(errno))); 4922 init_page_sizes((size_t) page_size); 4923 4924 Solaris::initialize_system_info(); 4925 4926 // Initialize misc. symbols as soon as possible, so we can use them 4927 // if we need them. 4928 Solaris::misc_sym_init(); 4929 4930 int fd = ::open("/dev/zero", O_RDWR); 4931 if (fd < 0) { 4932 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4933 } else { 4934 Solaris::set_dev_zero_fd(fd); 4935 4936 // Close on exec, child won't inherit. 4937 fcntl(fd, F_SETFD, FD_CLOEXEC); 4938 } 4939 4940 clock_tics_per_sec = CLK_TCK; 4941 4942 // check if dladdr1() exists; dladdr1 can provide more information than 4943 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4944 // and is available on linker patches for 5.7 and 5.8. 4945 // libdl.so must have been loaded, this call is just an entry lookup 4946 void * hdl = dlopen("libdl.so", RTLD_NOW); 4947 if (hdl) 4948 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4949 4950 // (Solaris only) this switches to calls that actually do locking. 4951 ThreadCritical::initialize(); 4952 4953 main_thread = thr_self(); 4954 4955 // Constant minimum stack size allowed. It must be at least 4956 // the minimum of what the OS supports (thr_min_stack()), and 4957 // enough to allow the thread to get to user bytecode execution. 4958 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4959 // If the pagesize of the VM is greater than 8K determine the appropriate 4960 // number of initial guard pages. The user can change this with the 4961 // command line arguments, if needed. 4962 if (vm_page_size() > 8*K) { 4963 StackYellowPages = 1; 4964 StackRedPages = 1; 4965 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4966 } 4967 } 4968 4969 // To install functions for atexit system call 4970 extern "C" { 4971 static void perfMemory_exit_helper() { 4972 perfMemory_exit(); 4973 } 4974 } 4975 4976 // this is called _after_ the global arguments have been parsed 4977 jint os::init_2(void) { 4978 // try to enable extended file IO ASAP, see 6431278 4979 os::Solaris::try_enable_extended_io(); 4980 4981 // Allocate a single page and mark it as readable for safepoint polling. Also 4982 // use this first mmap call to check support for MAP_ALIGN. 4983 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4984 page_size, 4985 MAP_PRIVATE | MAP_ALIGN, 4986 PROT_READ); 4987 if (polling_page == NULL) { 4988 has_map_align = false; 4989 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4990 PROT_READ); 4991 } 4992 4993 os::set_polling_page(polling_page); 4994 4995 #ifndef PRODUCT 4996 if( Verbose && PrintMiscellaneous ) 4997 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4998 #endif 4999 5000 if (!UseMembar) { 5001 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 5002 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 5003 os::set_memory_serialize_page( mem_serialize_page ); 5004 5005 #ifndef PRODUCT 5006 if(Verbose && PrintMiscellaneous) 5007 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 5008 #endif 5009 } 5010 5011 os::large_page_init(); 5012 5013 // Check minimum allowable stack size for thread creation and to initialize 5014 // the java system classes, including StackOverflowError - depends on page 5015 // size. Add a page for compiler2 recursion in main thread. 5016 // Add in 2*BytesPerWord times page size to account for VM stack during 5017 // class initialization depending on 32 or 64 bit VM. 5018 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 5019 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 5020 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 5021 5022 size_t threadStackSizeInBytes = ThreadStackSize * K; 5023 if (threadStackSizeInBytes != 0 && 5024 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 5025 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 5026 os::Solaris::min_stack_allowed/K); 5027 return JNI_ERR; 5028 } 5029 5030 // For 64kbps there will be a 64kb page size, which makes 5031 // the usable default stack size quite a bit less. Increase the 5032 // stack for 64kb (or any > than 8kb) pages, this increases 5033 // virtual memory fragmentation (since we're not creating the 5034 // stack on a power of 2 boundary. The real fix for this 5035 // should be to fix the guard page mechanism. 5036 5037 if (vm_page_size() > 8*K) { 5038 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 5039 ? threadStackSizeInBytes + 5040 ((StackYellowPages + StackRedPages) * vm_page_size()) 5041 : 0; 5042 ThreadStackSize = threadStackSizeInBytes/K; 5043 } 5044 5045 // Make the stack size a multiple of the page size so that 5046 // the yellow/red zones can be guarded. 5047 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 5048 vm_page_size())); 5049 5050 Solaris::libthread_init(); 5051 5052 if (UseNUMA) { 5053 if (!Solaris::liblgrp_init()) { 5054 UseNUMA = false; 5055 } else { 5056 size_t lgrp_limit = os::numa_get_groups_num(); 5057 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); 5058 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 5059 FREE_C_HEAP_ARRAY(int, lgrp_ids); 5060 if (lgrp_num < 2) { 5061 // There's only one locality group, disable NUMA. 5062 UseNUMA = false; 5063 } 5064 } 5065 // ISM is not compatible with the NUMA allocator - it always allocates 5066 // pages round-robin across the lgroups. 5067 if (UseNUMA && UseLargePages && UseISM) { 5068 if (!FLAG_IS_DEFAULT(UseNUMA)) { 5069 if (FLAG_IS_DEFAULT(UseLargePages) && FLAG_IS_DEFAULT(UseISM)) { 5070 UseLargePages = false; 5071 } else { 5072 warning("UseNUMA is not compatible with ISM large pages, disabling NUMA allocator"); 5073 UseNUMA = false; 5074 } 5075 } else { 5076 UseNUMA = false; 5077 } 5078 } 5079 if (!UseNUMA && ForceNUMA) { 5080 UseNUMA = true; 5081 } 5082 } 5083 5084 Solaris::signal_sets_init(); 5085 Solaris::init_signal_mem(); 5086 Solaris::install_signal_handlers(); 5087 5088 if (libjsigversion < JSIG_VERSION_1_4_1) { 5089 Maxlibjsigsigs = OLDMAXSIGNUM; 5090 } 5091 5092 // initialize synchronization primitives to use either thread or 5093 // lwp synchronization (controlled by UseLWPSynchronization) 5094 Solaris::synchronization_init(); 5095 5096 if (MaxFDLimit) { 5097 // set the number of file descriptors to max. print out error 5098 // if getrlimit/setrlimit fails but continue regardless. 5099 struct rlimit nbr_files; 5100 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 5101 if (status != 0) { 5102 if (PrintMiscellaneous && (Verbose || WizardMode)) 5103 perror("os::init_2 getrlimit failed"); 5104 } else { 5105 nbr_files.rlim_cur = nbr_files.rlim_max; 5106 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 5107 if (status != 0) { 5108 if (PrintMiscellaneous && (Verbose || WizardMode)) 5109 perror("os::init_2 setrlimit failed"); 5110 } 5111 } 5112 } 5113 5114 // Calculate theoretical max. size of Threads to guard gainst 5115 // artifical out-of-memory situations, where all available address- 5116 // space has been reserved by thread stacks. Default stack size is 1Mb. 5117 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 5118 JavaThread::stack_size_at_create() : (1*K*K); 5119 assert(pre_thread_stack_size != 0, "Must have a stack"); 5120 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 5121 // we should start doing Virtual Memory banging. Currently when the threads will 5122 // have used all but 200Mb of space. 5123 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 5124 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 5125 5126 // at-exit methods are called in the reverse order of their registration. 5127 // In Solaris 7 and earlier, atexit functions are called on return from 5128 // main or as a result of a call to exit(3C). There can be only 32 of 5129 // these functions registered and atexit() does not set errno. In Solaris 5130 // 8 and later, there is no limit to the number of functions registered 5131 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 5132 // functions are called upon dlclose(3DL) in addition to return from main 5133 // and exit(3C). 5134 5135 if (PerfAllowAtExitRegistration) { 5136 // only register atexit functions if PerfAllowAtExitRegistration is set. 5137 // atexit functions can be delayed until process exit time, which 5138 // can be problematic for embedded VM situations. Embedded VMs should 5139 // call DestroyJavaVM() to assure that VM resources are released. 5140 5141 // note: perfMemory_exit_helper atexit function may be removed in 5142 // the future if the appropriate cleanup code can be added to the 5143 // VM_Exit VMOperation's doit method. 5144 if (atexit(perfMemory_exit_helper) != 0) { 5145 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 5146 } 5147 } 5148 5149 // Init pset_loadavg function pointer 5150 init_pset_getloadavg_ptr(); 5151 5152 return JNI_OK; 5153 } 5154 5155 void os::init_3(void) { 5156 return; 5157 } 5158 5159 // Mark the polling page as unreadable 5160 void os::make_polling_page_unreadable(void) { 5161 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 5162 fatal("Could not disable polling page"); 5163 }; 5164 5165 // Mark the polling page as readable 5166 void os::make_polling_page_readable(void) { 5167 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 5168 fatal("Could not enable polling page"); 5169 }; 5170 5171 // OS interface. 5172 5173 bool os::check_heap(bool force) { return true; } 5174 5175 typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 5176 static vsnprintf_t sol_vsnprintf = NULL; 5177 5178 int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 5179 if (!sol_vsnprintf) { 5180 //search for the named symbol in the objects that were loaded after libjvm 5181 void* where = RTLD_NEXT; 5182 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5183 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5184 if (!sol_vsnprintf){ 5185 //search for the named symbol in the objects that were loaded before libjvm 5186 where = RTLD_DEFAULT; 5187 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 5188 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 5189 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 5190 } 5191 } 5192 return (*sol_vsnprintf)(buf, count, fmt, argptr); 5193 } 5194 5195 5196 // Is a (classpath) directory empty? 5197 bool os::dir_is_empty(const char* path) { 5198 DIR *dir = NULL; 5199 struct dirent *ptr; 5200 5201 dir = opendir(path); 5202 if (dir == NULL) return true; 5203 5204 /* Scan the directory */ 5205 bool result = true; 5206 char buf[sizeof(struct dirent) + MAX_PATH]; 5207 struct dirent *dbuf = (struct dirent *) buf; 5208 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5209 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5210 result = false; 5211 } 5212 } 5213 closedir(dir); 5214 return result; 5215 } 5216 5217 // This code originates from JDK's sysOpen and open64_w 5218 // from src/solaris/hpi/src/system_md.c 5219 5220 #ifndef O_DELETE 5221 #define O_DELETE 0x10000 5222 #endif 5223 5224 // Open a file. Unlink the file immediately after open returns 5225 // if the specified oflag has the O_DELETE flag set. 5226 // O_DELETE is used only in j2se/src/share/native/java/util/zip/ZipFile.c 5227 5228 int os::open(const char *path, int oflag, int mode) { 5229 if (strlen(path) > MAX_PATH - 1) { 5230 errno = ENAMETOOLONG; 5231 return -1; 5232 } 5233 int fd; 5234 int o_delete = (oflag & O_DELETE); 5235 oflag = oflag & ~O_DELETE; 5236 5237 fd = ::open64(path, oflag, mode); 5238 if (fd == -1) return -1; 5239 5240 //If the open succeeded, the file might still be a directory 5241 { 5242 struct stat64 buf64; 5243 int ret = ::fstat64(fd, &buf64); 5244 int st_mode = buf64.st_mode; 5245 5246 if (ret != -1) { 5247 if ((st_mode & S_IFMT) == S_IFDIR) { 5248 errno = EISDIR; 5249 ::close(fd); 5250 return -1; 5251 } 5252 } else { 5253 ::close(fd); 5254 return -1; 5255 } 5256 } 5257 /* 5258 * 32-bit Solaris systems suffer from: 5259 * 5260 * - an historical default soft limit of 256 per-process file 5261 * descriptors that is too low for many Java programs. 5262 * 5263 * - a design flaw where file descriptors created using stdio 5264 * fopen must be less than 256, _even_ when the first limit above 5265 * has been raised. This can cause calls to fopen (but not calls to 5266 * open, for example) to fail mysteriously, perhaps in 3rd party 5267 * native code (although the JDK itself uses fopen). One can hardly 5268 * criticize them for using this most standard of all functions. 5269 * 5270 * We attempt to make everything work anyways by: 5271 * 5272 * - raising the soft limit on per-process file descriptors beyond 5273 * 256 5274 * 5275 * - As of Solaris 10u4, we can request that Solaris raise the 256 5276 * stdio fopen limit by calling function enable_extended_FILE_stdio. 5277 * This is done in init_2 and recorded in enabled_extended_FILE_stdio 5278 * 5279 * - If we are stuck on an old (pre 10u4) Solaris system, we can 5280 * workaround the bug by remapping non-stdio file descriptors below 5281 * 256 to ones beyond 256, which is done below. 5282 * 5283 * See: 5284 * 1085341: 32-bit stdio routines should support file descriptors >255 5285 * 6533291: Work around 32-bit Solaris stdio limit of 256 open files 5286 * 6431278: Netbeans crash on 32 bit Solaris: need to call 5287 * enable_extended_FILE_stdio() in VM initialisation 5288 * Giri Mandalika's blog 5289 * http://technopark02.blogspot.com/2005_05_01_archive.html 5290 */ 5291 #ifndef _LP64 5292 if ((!enabled_extended_FILE_stdio) && fd < 256) { 5293 int newfd = ::fcntl(fd, F_DUPFD, 256); 5294 if (newfd != -1) { 5295 ::close(fd); 5296 fd = newfd; 5297 } 5298 } 5299 #endif // 32-bit Solaris 5300 /* 5301 * All file descriptors that are opened in the JVM and not 5302 * specifically destined for a subprocess should have the 5303 * close-on-exec flag set. If we don't set it, then careless 3rd 5304 * party native code might fork and exec without closing all 5305 * appropriate file descriptors (e.g. as we do in closeDescriptors in 5306 * UNIXProcess.c), and this in turn might: 5307 * 5308 * - cause end-of-file to fail to be detected on some file 5309 * descriptors, resulting in mysterious hangs, or 5310 * 5311 * - might cause an fopen in the subprocess to fail on a system 5312 * suffering from bug 1085341. 5313 * 5314 * (Yes, the default setting of the close-on-exec flag is a Unix 5315 * design flaw) 5316 * 5317 * See: 5318 * 1085341: 32-bit stdio routines should support file descriptors >255 5319 * 4843136: (process) pipe file descriptor from Runtime.exec not being closed 5320 * 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 5321 */ 5322 #ifdef FD_CLOEXEC 5323 { 5324 int flags = ::fcntl(fd, F_GETFD); 5325 if (flags != -1) 5326 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 5327 } 5328 #endif 5329 5330 if (o_delete != 0) { 5331 ::unlink(path); 5332 } 5333 return fd; 5334 } 5335 5336 // create binary file, rewriting existing file if required 5337 int os::create_binary_file(const char* path, bool rewrite_existing) { 5338 int oflags = O_WRONLY | O_CREAT; 5339 if (!rewrite_existing) { 5340 oflags |= O_EXCL; 5341 } 5342 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5343 } 5344 5345 // return current position of file pointer 5346 jlong os::current_file_offset(int fd) { 5347 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5348 } 5349 5350 // move file pointer to the specified offset 5351 jlong os::seek_to_file_offset(int fd, jlong offset) { 5352 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5353 } 5354 5355 jlong os::lseek(int fd, jlong offset, int whence) { 5356 return (jlong) ::lseek64(fd, offset, whence); 5357 } 5358 5359 char * os::native_path(char *path) { 5360 return path; 5361 } 5362 5363 int os::ftruncate(int fd, jlong length) { 5364 return ::ftruncate64(fd, length); 5365 } 5366 5367 int os::fsync(int fd) { 5368 RESTARTABLE_RETURN_INT(::fsync(fd)); 5369 } 5370 5371 int os::available(int fd, jlong *bytes) { 5372 jlong cur, end; 5373 int mode; 5374 struct stat64 buf64; 5375 5376 if (::fstat64(fd, &buf64) >= 0) { 5377 mode = buf64.st_mode; 5378 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 5379 /* 5380 * XXX: is the following call interruptible? If so, this might 5381 * need to go through the INTERRUPT_IO() wrapper as for other 5382 * blocking, interruptible calls in this file. 5383 */ 5384 int n,ioctl_return; 5385 5386 INTERRUPTIBLE(::ioctl(fd, FIONREAD, &n),ioctl_return,os::Solaris::clear_interrupted); 5387 if (ioctl_return>= 0) { 5388 *bytes = n; 5389 return 1; 5390 } 5391 } 5392 } 5393 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 5394 return 0; 5395 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 5396 return 0; 5397 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 5398 return 0; 5399 } 5400 *bytes = end - cur; 5401 return 1; 5402 } 5403 5404 // Map a block of memory. 5405 char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5406 char *addr, size_t bytes, bool read_only, 5407 bool allow_exec) { 5408 int prot; 5409 int flags; 5410 5411 if (read_only) { 5412 prot = PROT_READ; 5413 flags = MAP_SHARED; 5414 } else { 5415 prot = PROT_READ | PROT_WRITE; 5416 flags = MAP_PRIVATE; 5417 } 5418 5419 if (allow_exec) { 5420 prot |= PROT_EXEC; 5421 } 5422 5423 if (addr != NULL) { 5424 flags |= MAP_FIXED; 5425 } 5426 5427 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5428 fd, file_offset); 5429 if (mapped_address == MAP_FAILED) { 5430 return NULL; 5431 } 5432 return mapped_address; 5433 } 5434 5435 5436 // Remap a block of memory. 5437 char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5438 char *addr, size_t bytes, bool read_only, 5439 bool allow_exec) { 5440 // same as map_memory() on this OS 5441 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5442 allow_exec); 5443 } 5444 5445 5446 // Unmap a block of memory. 5447 bool os::unmap_memory(char* addr, size_t bytes) { 5448 return munmap(addr, bytes) == 0; 5449 } 5450 5451 void os::pause() { 5452 char filename[MAX_PATH]; 5453 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5454 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5455 } else { 5456 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5457 } 5458 5459 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5460 if (fd != -1) { 5461 struct stat buf; 5462 ::close(fd); 5463 while (::stat(filename, &buf) == 0) { 5464 (void)::poll(NULL, 0, 100); 5465 } 5466 } else { 5467 jio_fprintf(stderr, 5468 "Could not open pause file '%s', continuing immediately.\n", filename); 5469 } 5470 } 5471 5472 #ifndef PRODUCT 5473 #ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5474 // Turn this on if you need to trace synch operations. 5475 // Set RECORD_SYNCH_LIMIT to a large-enough value, 5476 // and call record_synch_enable and record_synch_disable 5477 // around the computation of interest. 5478 5479 void record_synch(char* name, bool returning); // defined below 5480 5481 class RecordSynch { 5482 char* _name; 5483 public: 5484 RecordSynch(char* name) :_name(name) 5485 { record_synch(_name, false); } 5486 ~RecordSynch() { record_synch(_name, true); } 5487 }; 5488 5489 #define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5490 extern "C" ret name params { \ 5491 typedef ret name##_t params; \ 5492 static name##_t* implem = NULL; \ 5493 static int callcount = 0; \ 5494 if (implem == NULL) { \ 5495 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5496 if (implem == NULL) fatal(dlerror()); \ 5497 } \ 5498 ++callcount; \ 5499 RecordSynch _rs(#name); \ 5500 inner; \ 5501 return implem args; \ 5502 } 5503 // in dbx, examine callcounts this way: 5504 // for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5505 5506 #define CHECK_POINTER_OK(p) \ 5507 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5508 #define CHECK_MU \ 5509 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5510 #define CHECK_CV \ 5511 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5512 #define CHECK_P(p) \ 5513 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5514 5515 #define CHECK_MUTEX(mutex_op) \ 5516 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5517 5518 CHECK_MUTEX( mutex_lock) 5519 CHECK_MUTEX( _mutex_lock) 5520 CHECK_MUTEX( mutex_unlock) 5521 CHECK_MUTEX(_mutex_unlock) 5522 CHECK_MUTEX( mutex_trylock) 5523 CHECK_MUTEX(_mutex_trylock) 5524 5525 #define CHECK_COND(cond_op) \ 5526 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5527 5528 CHECK_COND( cond_wait); 5529 CHECK_COND(_cond_wait); 5530 CHECK_COND(_cond_wait_cancel); 5531 5532 #define CHECK_COND2(cond_op) \ 5533 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5534 5535 CHECK_COND2( cond_timedwait); 5536 CHECK_COND2(_cond_timedwait); 5537 CHECK_COND2(_cond_timedwait_cancel); 5538 5539 // do the _lwp_* versions too 5540 #define mutex_t lwp_mutex_t 5541 #define cond_t lwp_cond_t 5542 CHECK_MUTEX( _lwp_mutex_lock) 5543 CHECK_MUTEX( _lwp_mutex_unlock) 5544 CHECK_MUTEX( _lwp_mutex_trylock) 5545 CHECK_MUTEX( __lwp_mutex_lock) 5546 CHECK_MUTEX( __lwp_mutex_unlock) 5547 CHECK_MUTEX( __lwp_mutex_trylock) 5548 CHECK_MUTEX(___lwp_mutex_lock) 5549 CHECK_MUTEX(___lwp_mutex_unlock) 5550 5551 CHECK_COND( _lwp_cond_wait); 5552 CHECK_COND( __lwp_cond_wait); 5553 CHECK_COND(___lwp_cond_wait); 5554 5555 CHECK_COND2( _lwp_cond_timedwait); 5556 CHECK_COND2( __lwp_cond_timedwait); 5557 #undef mutex_t 5558 #undef cond_t 5559 5560 CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5561 CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5562 CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5563 CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5564 CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5565 CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5566 CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5567 CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5568 5569 5570 // recording machinery: 5571 5572 enum { RECORD_SYNCH_LIMIT = 200 }; 5573 char* record_synch_name[RECORD_SYNCH_LIMIT]; 5574 void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5575 bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5576 thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5577 int record_synch_count = 0; 5578 bool record_synch_enabled = false; 5579 5580 // in dbx, examine recorded data this way: 5581 // for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5582 5583 void record_synch(char* name, bool returning) { 5584 if (record_synch_enabled) { 5585 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5586 record_synch_name[record_synch_count] = name; 5587 record_synch_returning[record_synch_count] = returning; 5588 record_synch_thread[record_synch_count] = thr_self(); 5589 record_synch_arg0ptr[record_synch_count] = &name; 5590 record_synch_count++; 5591 } 5592 // put more checking code here: 5593 // ... 5594 } 5595 } 5596 5597 void record_synch_enable() { 5598 // start collecting trace data, if not already doing so 5599 if (!record_synch_enabled) record_synch_count = 0; 5600 record_synch_enabled = true; 5601 } 5602 5603 void record_synch_disable() { 5604 // stop collecting trace data 5605 record_synch_enabled = false; 5606 } 5607 5608 #endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5609 #endif // PRODUCT 5610 5611 const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5612 const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5613 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5614 5615 5616 // JVMTI & JVM monitoring and management support 5617 // The thread_cpu_time() and current_thread_cpu_time() are only 5618 // supported if is_thread_cpu_time_supported() returns true. 5619 // They are not supported on Solaris T1. 5620 5621 // current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5622 // are used by JVM M&M and JVMTI to get user+sys or user CPU time 5623 // of a thread. 5624 // 5625 // current_thread_cpu_time() and thread_cpu_time(Thread *) 5626 // returns the fast estimate available on the platform. 5627 5628 // hrtime_t gethrvtime() return value includes 5629 // user time but does not include system time 5630 jlong os::current_thread_cpu_time() { 5631 return (jlong) gethrvtime(); 5632 } 5633 5634 jlong os::thread_cpu_time(Thread *thread) { 5635 // return user level CPU time only to be consistent with 5636 // what current_thread_cpu_time returns. 5637 // thread_cpu_time_info() must be changed if this changes 5638 return os::thread_cpu_time(thread, false /* user time only */); 5639 } 5640 5641 jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5642 if (user_sys_cpu_time) { 5643 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5644 } else { 5645 return os::current_thread_cpu_time(); 5646 } 5647 } 5648 5649 jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5650 char proc_name[64]; 5651 int count; 5652 prusage_t prusage; 5653 jlong lwp_time; 5654 int fd; 5655 5656 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5657 getpid(), 5658 thread->osthread()->lwp_id()); 5659 fd = ::open(proc_name, O_RDONLY); 5660 if ( fd == -1 ) return -1; 5661 5662 do { 5663 count = ::pread(fd, 5664 (void *)&prusage.pr_utime, 5665 thr_time_size, 5666 thr_time_off); 5667 } while (count < 0 && errno == EINTR); 5668 ::close(fd); 5669 if ( count < 0 ) return -1; 5670 5671 if (user_sys_cpu_time) { 5672 // user + system CPU time 5673 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5674 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5675 (jlong)prusage.pr_stime.tv_nsec + 5676 (jlong)prusage.pr_utime.tv_nsec; 5677 } else { 5678 // user level CPU time only 5679 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5680 (jlong)prusage.pr_utime.tv_nsec; 5681 } 5682 5683 return(lwp_time); 5684 } 5685 5686 void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5687 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5688 info_ptr->may_skip_backward = false; // elapsed time not wall time 5689 info_ptr->may_skip_forward = false; // elapsed time not wall time 5690 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5691 } 5692 5693 void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5694 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5695 info_ptr->may_skip_backward = false; // elapsed time not wall time 5696 info_ptr->may_skip_forward = false; // elapsed time not wall time 5697 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5698 } 5699 5700 bool os::is_thread_cpu_time_supported() { 5701 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5702 return true; 5703 } else { 5704 return false; 5705 } 5706 } 5707 5708 // System loadavg support. Returns -1 if load average cannot be obtained. 5709 // Return the load average for our processor set if the primitive exists 5710 // (Solaris 9 and later). Otherwise just return system wide loadavg. 5711 int os::loadavg(double loadavg[], int nelem) { 5712 if (pset_getloadavg_ptr != NULL) { 5713 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5714 } else { 5715 return ::getloadavg(loadavg, nelem); 5716 } 5717 } 5718 5719 //--------------------------------------------------------------------------------- 5720 5721 static address same_page(address x, address y) { 5722 intptr_t page_bits = -os::vm_page_size(); 5723 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5724 return x; 5725 else if (x > y) 5726 return (address)(intptr_t(y) | ~page_bits) + 1; 5727 else 5728 return (address)(intptr_t(y) & page_bits); 5729 } 5730 5731 bool os::find(address addr, outputStream* st) { 5732 Dl_info dlinfo; 5733 memset(&dlinfo, 0, sizeof(dlinfo)); 5734 if (dladdr(addr, &dlinfo)) { 5735 #ifdef _LP64 5736 st->print("0x%016lx: ", addr); 5737 #else 5738 st->print("0x%08x: ", addr); 5739 #endif 5740 if (dlinfo.dli_sname != NULL) 5741 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5742 else if (dlinfo.dli_fname) 5743 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5744 else 5745 st->print("<absolute address>"); 5746 if (dlinfo.dli_fname) st->print(" in %s", dlinfo.dli_fname); 5747 #ifdef _LP64 5748 if (dlinfo.dli_fbase) st->print(" at 0x%016lx", dlinfo.dli_fbase); 5749 #else 5750 if (dlinfo.dli_fbase) st->print(" at 0x%08x", dlinfo.dli_fbase); 5751 #endif 5752 st->cr(); 5753 5754 if (Verbose) { 5755 // decode some bytes around the PC 5756 address begin = same_page(addr-40, addr); 5757 address end = same_page(addr+40, addr); 5758 address lowest = (address) dlinfo.dli_sname; 5759 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5760 if (begin < lowest) begin = lowest; 5761 Dl_info dlinfo2; 5762 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5763 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5764 end = (address) dlinfo2.dli_saddr; 5765 Disassembler::decode(begin, end, st); 5766 } 5767 return true; 5768 } 5769 return false; 5770 } 5771 5772 // Following function has been added to support HotSparc's libjvm.so running 5773 // under Solaris production JDK 1.2.2 / 1.3.0. These came from 5774 // src/solaris/hpi/native_threads in the EVM codebase. 5775 // 5776 // NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5777 // libraries and should thus be removed. We will leave it behind for a while 5778 // until we no longer want to able to run on top of 1.3.0 Solaris production 5779 // JDK. See 4341971. 5780 5781 #define STACK_SLACK 0x800 5782 5783 extern "C" { 5784 intptr_t sysThreadAvailableStackWithSlack() { 5785 stack_t st; 5786 intptr_t retval, stack_top; 5787 retval = thr_stksegment(&st); 5788 assert(retval == 0, "incorrect return value from thr_stksegment"); 5789 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5790 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5791 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5792 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5793 } 5794 } 5795 5796 // Just to get the Kernel build to link on solaris for testing. 5797 5798 extern "C" { 5799 class ASGCT_CallTrace; 5800 void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5801 KERNEL_RETURN; 5802 } 5803 5804 5805 // ObjectMonitor park-unpark infrastructure ... 5806 // 5807 // We implement Solaris and Linux PlatformEvents with the 5808 // obvious condvar-mutex-flag triple. 5809 // Another alternative that works quite well is pipes: 5810 // Each PlatformEvent consists of a pipe-pair. 5811 // The thread associated with the PlatformEvent 5812 // calls park(), which reads from the input end of the pipe. 5813 // Unpark() writes into the other end of the pipe. 5814 // The write-side of the pipe must be set NDELAY. 5815 // Unfortunately pipes consume a large # of handles. 5816 // Native solaris lwp_park() and lwp_unpark() work nicely, too. 5817 // Using pipes for the 1st few threads might be workable, however. 5818 // 5819 // park() is permitted to return spuriously. 5820 // Callers of park() should wrap the call to park() in 5821 // an appropriate loop. A litmus test for the correct 5822 // usage of park is the following: if park() were modified 5823 // to immediately return 0 your code should still work, 5824 // albeit degenerating to a spin loop. 5825 // 5826 // An interesting optimization for park() is to use a trylock() 5827 // to attempt to acquire the mutex. If the trylock() fails 5828 // then we know that a concurrent unpark() operation is in-progress. 5829 // in that case the park() code could simply set _count to 0 5830 // and return immediately. The subsequent park() operation *might* 5831 // return immediately. That's harmless as the caller of park() is 5832 // expected to loop. By using trylock() we will have avoided a 5833 // avoided a context switch caused by contention on the per-thread mutex. 5834 // 5835 // TODO-FIXME: 5836 // 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5837 // objectmonitor implementation. 5838 // 2. Collapse the JSR166 parker event, and the 5839 // objectmonitor ParkEvent into a single "Event" construct. 5840 // 3. In park() and unpark() add: 5841 // assert (Thread::current() == AssociatedWith). 5842 // 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5843 // 1-out-of-N park() operations will return immediately. 5844 // 5845 // _Event transitions in park() 5846 // -1 => -1 : illegal 5847 // 1 => 0 : pass - return immediately 5848 // 0 => -1 : block 5849 // 5850 // _Event serves as a restricted-range semaphore. 5851 // 5852 // Another possible encoding of _Event would be with 5853 // explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5854 // 5855 // TODO-FIXME: add DTRACE probes for: 5856 // 1. Tx parks 5857 // 2. Ty unparks Tx 5858 // 3. Tx resumes from park 5859 5860 5861 // value determined through experimentation 5862 #define ROUNDINGFIX 11 5863 5864 // utility to compute the abstime argument to timedwait. 5865 // TODO-FIXME: switch from compute_abstime() to unpackTime(). 5866 5867 static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5868 // millis is the relative timeout time 5869 // abstime will be the absolute timeout time 5870 if (millis < 0) millis = 0; 5871 struct timeval now; 5872 int status = gettimeofday(&now, NULL); 5873 assert(status == 0, "gettimeofday"); 5874 jlong seconds = millis / 1000; 5875 jlong max_wait_period; 5876 5877 if (UseLWPSynchronization) { 5878 // forward port of fix for 4275818 (not sleeping long enough) 5879 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5880 // _lwp_cond_timedwait() used a round_down algorithm rather 5881 // than a round_up. For millis less than our roundfactor 5882 // it rounded down to 0 which doesn't meet the spec. 5883 // For millis > roundfactor we may return a bit sooner, but 5884 // since we can not accurately identify the patch level and 5885 // this has already been fixed in Solaris 9 and 8 we will 5886 // leave it alone rather than always rounding down. 5887 5888 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5889 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5890 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5891 max_wait_period = 21000000; 5892 } else { 5893 max_wait_period = 50000000; 5894 } 5895 millis %= 1000; 5896 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5897 seconds = max_wait_period; 5898 } 5899 abstime->tv_sec = now.tv_sec + seconds; 5900 long usec = now.tv_usec + millis * 1000; 5901 if (usec >= 1000000) { 5902 abstime->tv_sec += 1; 5903 usec -= 1000000; 5904 } 5905 abstime->tv_nsec = usec * 1000; 5906 return abstime; 5907 } 5908 5909 // Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5910 // Conceptually TryPark() should be equivalent to park(0). 5911 5912 int os::PlatformEvent::TryPark() { 5913 for (;;) { 5914 const int v = _Event ; 5915 guarantee ((v == 0) || (v == 1), "invariant") ; 5916 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5917 } 5918 } 5919 5920 void os::PlatformEvent::park() { // AKA: down() 5921 // Invariant: Only the thread associated with the Event/PlatformEvent 5922 // may call park(). 5923 int v ; 5924 for (;;) { 5925 v = _Event ; 5926 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5927 } 5928 guarantee (v >= 0, "invariant") ; 5929 if (v == 0) { 5930 // Do this the hard way by blocking ... 5931 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5932 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5933 // Only for SPARC >= V8PlusA 5934 #if defined(__sparc) && defined(COMPILER2) 5935 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5936 #endif 5937 int status = os::Solaris::mutex_lock(_mutex); 5938 assert_status(status == 0, status, "mutex_lock"); 5939 guarantee (_nParked == 0, "invariant") ; 5940 ++ _nParked ; 5941 while (_Event < 0) { 5942 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5943 // Treat this the same as if the wait was interrupted 5944 // With usr/lib/lwp going to kernel, always handle ETIME 5945 status = os::Solaris::cond_wait(_cond, _mutex); 5946 if (status == ETIME) status = EINTR ; 5947 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5948 } 5949 -- _nParked ; 5950 _Event = 0 ; 5951 status = os::Solaris::mutex_unlock(_mutex); 5952 assert_status(status == 0, status, "mutex_unlock"); 5953 } 5954 } 5955 5956 int os::PlatformEvent::park(jlong millis) { 5957 guarantee (_nParked == 0, "invariant") ; 5958 int v ; 5959 for (;;) { 5960 v = _Event ; 5961 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5962 } 5963 guarantee (v >= 0, "invariant") ; 5964 if (v != 0) return OS_OK ; 5965 5966 int ret = OS_TIMEOUT; 5967 timestruc_t abst; 5968 compute_abstime (&abst, millis); 5969 5970 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5971 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5972 // Only for SPARC >= V8PlusA 5973 #if defined(__sparc) && defined(COMPILER2) 5974 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5975 #endif 5976 int status = os::Solaris::mutex_lock(_mutex); 5977 assert_status(status == 0, status, "mutex_lock"); 5978 guarantee (_nParked == 0, "invariant") ; 5979 ++ _nParked ; 5980 while (_Event < 0) { 5981 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5982 assert_status(status == 0 || status == EINTR || 5983 status == ETIME || status == ETIMEDOUT, 5984 status, "cond_timedwait"); 5985 if (!FilterSpuriousWakeups) break ; // previous semantics 5986 if (status == ETIME || status == ETIMEDOUT) break ; 5987 // We consume and ignore EINTR and spurious wakeups. 5988 } 5989 -- _nParked ; 5990 if (_Event >= 0) ret = OS_OK ; 5991 _Event = 0 ; 5992 status = os::Solaris::mutex_unlock(_mutex); 5993 assert_status(status == 0, status, "mutex_unlock"); 5994 return ret; 5995 } 5996 5997 void os::PlatformEvent::unpark() { 5998 int v, AnyWaiters; 5999 6000 // Increment _Event. 6001 // Another acceptable implementation would be to simply swap 1 6002 // into _Event: 6003 // if (Swap (&_Event, 1) < 0) { 6004 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 6005 // if (AnyWaiters) cond_signal (_cond) ; 6006 // } 6007 6008 for (;;) { 6009 v = _Event ; 6010 if (v > 0) { 6011 // The LD of _Event could have reordered or be satisfied 6012 // by a read-aside from this processor's write buffer. 6013 // To avoid problems execute a barrier and then 6014 // ratify the value. A degenerate CAS() would also work. 6015 // Viz., CAS (v+0, &_Event, v) == v). 6016 OrderAccess::fence() ; 6017 if (_Event == v) return ; 6018 continue ; 6019 } 6020 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 6021 } 6022 6023 // If the thread associated with the event was parked, wake it. 6024 if (v < 0) { 6025 int status ; 6026 // Wait for the thread assoc with the PlatformEvent to vacate. 6027 status = os::Solaris::mutex_lock(_mutex); 6028 assert_status(status == 0, status, "mutex_lock"); 6029 AnyWaiters = _nParked ; 6030 status = os::Solaris::mutex_unlock(_mutex); 6031 assert_status(status == 0, status, "mutex_unlock"); 6032 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 6033 if (AnyWaiters != 0) { 6034 // We intentional signal *after* dropping the lock 6035 // to avoid a common class of futile wakeups. 6036 status = os::Solaris::cond_signal(_cond); 6037 assert_status(status == 0, status, "cond_signal"); 6038 } 6039 } 6040 } 6041 6042 // JSR166 6043 // ------------------------------------------------------- 6044 6045 /* 6046 * The solaris and linux implementations of park/unpark are fairly 6047 * conservative for now, but can be improved. They currently use a 6048 * mutex/condvar pair, plus _counter. 6049 * Park decrements _counter if > 0, else does a condvar wait. Unpark 6050 * sets count to 1 and signals condvar. Only one thread ever waits 6051 * on the condvar. Contention seen when trying to park implies that someone 6052 * is unparking you, so don't wait. And spurious returns are fine, so there 6053 * is no need to track notifications. 6054 */ 6055 6056 #define NANOSECS_PER_SEC 1000000000 6057 #define NANOSECS_PER_MILLISEC 1000000 6058 #define MAX_SECS 100000000 6059 6060 /* 6061 * This code is common to linux and solaris and will be moved to a 6062 * common place in dolphin. 6063 * 6064 * The passed in time value is either a relative time in nanoseconds 6065 * or an absolute time in milliseconds. Either way it has to be unpacked 6066 * into suitable seconds and nanoseconds components and stored in the 6067 * given timespec structure. 6068 * Given time is a 64-bit value and the time_t used in the timespec is only 6069 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 6070 * overflow if times way in the future are given. Further on Solaris versions 6071 * prior to 10 there is a restriction (see cond_timedwait) that the specified 6072 * number of seconds, in abstime, is less than current_time + 100,000,000. 6073 * As it will be 28 years before "now + 100000000" will overflow we can 6074 * ignore overflow and just impose a hard-limit on seconds using the value 6075 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 6076 * years from "now". 6077 */ 6078 static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 6079 assert (time > 0, "convertTime"); 6080 6081 struct timeval now; 6082 int status = gettimeofday(&now, NULL); 6083 assert(status == 0, "gettimeofday"); 6084 6085 time_t max_secs = now.tv_sec + MAX_SECS; 6086 6087 if (isAbsolute) { 6088 jlong secs = time / 1000; 6089 if (secs > max_secs) { 6090 absTime->tv_sec = max_secs; 6091 } 6092 else { 6093 absTime->tv_sec = secs; 6094 } 6095 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 6096 } 6097 else { 6098 jlong secs = time / NANOSECS_PER_SEC; 6099 if (secs >= MAX_SECS) { 6100 absTime->tv_sec = max_secs; 6101 absTime->tv_nsec = 0; 6102 } 6103 else { 6104 absTime->tv_sec = now.tv_sec + secs; 6105 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 6106 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 6107 absTime->tv_nsec -= NANOSECS_PER_SEC; 6108 ++absTime->tv_sec; // note: this must be <= max_secs 6109 } 6110 } 6111 } 6112 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 6113 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 6114 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 6115 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 6116 } 6117 6118 void Parker::park(bool isAbsolute, jlong time) { 6119 6120 // Optional fast-path check: 6121 // Return immediately if a permit is available. 6122 if (_counter > 0) { 6123 _counter = 0 ; 6124 OrderAccess::fence(); 6125 return ; 6126 } 6127 6128 // Optional fast-exit: Check interrupt before trying to wait 6129 Thread* thread = Thread::current(); 6130 assert(thread->is_Java_thread(), "Must be JavaThread"); 6131 JavaThread *jt = (JavaThread *)thread; 6132 if (Thread::is_interrupted(thread, false)) { 6133 return; 6134 } 6135 6136 // First, demultiplex/decode time arguments 6137 timespec absTime; 6138 if (time < 0 || (isAbsolute && time == 0) ) { // don't wait at all 6139 return; 6140 } 6141 if (time > 0) { 6142 // Warning: this code might be exposed to the old Solaris time 6143 // round-down bugs. Grep "roundingFix" for details. 6144 unpackTime(&absTime, isAbsolute, time); 6145 } 6146 6147 // Enter safepoint region 6148 // Beware of deadlocks such as 6317397. 6149 // The per-thread Parker:: _mutex is a classic leaf-lock. 6150 // In particular a thread must never block on the Threads_lock while 6151 // holding the Parker:: mutex. If safepoints are pending both the 6152 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 6153 ThreadBlockInVM tbivm(jt); 6154 6155 // Don't wait if cannot get lock since interference arises from 6156 // unblocking. Also. check interrupt before trying wait 6157 if (Thread::is_interrupted(thread, false) || 6158 os::Solaris::mutex_trylock(_mutex) != 0) { 6159 return; 6160 } 6161 6162 int status ; 6163 6164 if (_counter > 0) { // no wait needed 6165 _counter = 0; 6166 status = os::Solaris::mutex_unlock(_mutex); 6167 assert (status == 0, "invariant") ; 6168 OrderAccess::fence(); 6169 return; 6170 } 6171 6172 #ifdef ASSERT 6173 // Don't catch signals while blocked; let the running threads have the signals. 6174 // (This allows a debugger to break into the running thread.) 6175 sigset_t oldsigs; 6176 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 6177 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 6178 #endif 6179 6180 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 6181 jt->set_suspend_equivalent(); 6182 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 6183 6184 // Do this the hard way by blocking ... 6185 // See http://monaco.sfbay/detail.jsf?cr=5094058. 6186 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 6187 // Only for SPARC >= V8PlusA 6188 #if defined(__sparc) && defined(COMPILER2) 6189 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 6190 #endif 6191 6192 if (time == 0) { 6193 status = os::Solaris::cond_wait (_cond, _mutex) ; 6194 } else { 6195 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 6196 } 6197 // Note that an untimed cond_wait() can sometimes return ETIME on older 6198 // versions of the Solaris. 6199 assert_status(status == 0 || status == EINTR || 6200 status == ETIME || status == ETIMEDOUT, 6201 status, "cond_timedwait"); 6202 6203 #ifdef ASSERT 6204 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 6205 #endif 6206 _counter = 0 ; 6207 status = os::Solaris::mutex_unlock(_mutex); 6208 assert_status(status == 0, status, "mutex_unlock") ; 6209 6210 // If externally suspended while waiting, re-suspend 6211 if (jt->handle_special_suspend_equivalent_condition()) { 6212 jt->java_suspend_self(); 6213 } 6214 OrderAccess::fence(); 6215 } 6216 6217 void Parker::unpark() { 6218 int s, status ; 6219 status = os::Solaris::mutex_lock (_mutex) ; 6220 assert (status == 0, "invariant") ; 6221 s = _counter; 6222 _counter = 1; 6223 status = os::Solaris::mutex_unlock (_mutex) ; 6224 assert (status == 0, "invariant") ; 6225 6226 if (s < 1) { 6227 status = os::Solaris::cond_signal (_cond) ; 6228 assert (status == 0, "invariant") ; 6229 } 6230 } 6231 6232 extern char** environ; 6233 6234 // Run the specified command in a separate process. Return its exit value, 6235 // or -1 on failure (e.g. can't fork a new process). 6236 // Unlike system(), this function can be called from signal handler. It 6237 // doesn't block SIGINT et al. 6238 int os::fork_and_exec(char* cmd) { 6239 char * argv[4]; 6240 argv[0] = (char *)"sh"; 6241 argv[1] = (char *)"-c"; 6242 argv[2] = cmd; 6243 argv[3] = NULL; 6244 6245 // fork is async-safe, fork1 is not so can't use in signal handler 6246 pid_t pid; 6247 Thread* t = ThreadLocalStorage::get_thread_slow(); 6248 if (t != NULL && t->is_inside_signal_handler()) { 6249 pid = fork(); 6250 } else { 6251 pid = fork1(); 6252 } 6253 6254 if (pid < 0) { 6255 // fork failed 6256 warning("fork failed: %s", strerror(errno)); 6257 return -1; 6258 6259 } else if (pid == 0) { 6260 // child process 6261 6262 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 6263 execve("/usr/bin/sh", argv, environ); 6264 6265 // execve failed 6266 _exit(-1); 6267 6268 } else { 6269 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 6270 // care about the actual exit code, for now. 6271 6272 int status; 6273 6274 // Wait for the child process to exit. This returns immediately if 6275 // the child has already exited. */ 6276 while (waitpid(pid, &status, 0) < 0) { 6277 switch (errno) { 6278 case ECHILD: return 0; 6279 case EINTR: break; 6280 default: return -1; 6281 } 6282 } 6283 6284 if (WIFEXITED(status)) { 6285 // The child exited normally; get its exit code. 6286 return WEXITSTATUS(status); 6287 } else if (WIFSIGNALED(status)) { 6288 // The child exited because of a signal 6289 // The best value to return is 0x80 + signal number, 6290 // because that is what all Unix shells do, and because 6291 // it allows callers to distinguish between process exit and 6292 // process death by signal. 6293 return 0x80 + WTERMSIG(status); 6294 } else { 6295 // Unknown exit code; pass it through 6296 return status; 6297 } 6298 } 6299 } 6300 6301 // is_headless_jre() 6302 // 6303 // Test for the existence of libmawt in motif21 or xawt directories 6304 // in order to report if we are running in a headless jre 6305 // 6306 bool os::is_headless_jre() { 6307 struct stat statbuf; 6308 char buf[MAXPATHLEN]; 6309 char libmawtpath[MAXPATHLEN]; 6310 const char *xawtstr = "/xawt/libmawt.so"; 6311 const char *motifstr = "/motif21/libmawt.so"; 6312 char *p; 6313 6314 // Get path to libjvm.so 6315 os::jvm_path(buf, sizeof(buf)); 6316 6317 // Get rid of libjvm.so 6318 p = strrchr(buf, '/'); 6319 if (p == NULL) return false; 6320 else *p = '\0'; 6321 6322 // Get rid of client or server 6323 p = strrchr(buf, '/'); 6324 if (p == NULL) return false; 6325 else *p = '\0'; 6326 6327 // check xawt/libmawt.so 6328 strcpy(libmawtpath, buf); 6329 strcat(libmawtpath, xawtstr); 6330 if (::stat(libmawtpath, &statbuf) == 0) return false; 6331 6332 // check motif21/libmawt.so 6333 strcpy(libmawtpath, buf); 6334 strcat(libmawtpath, motifstr); 6335 if (::stat(libmawtpath, &statbuf) == 0) return false; 6336 6337 return true; 6338 } 6339 6340 size_t os::write(int fd, const void *buf, unsigned int nBytes) { 6341 INTERRUPTIBLE_RETURN_INT(::write(fd, buf, nBytes), os::Solaris::clear_interrupted); 6342 } 6343 6344 int os::close(int fd) { 6345 RESTARTABLE_RETURN_INT(::close(fd)); 6346 } 6347 6348 int os::socket_close(int fd) { 6349 RESTARTABLE_RETURN_INT(::close(fd)); 6350 } 6351 6352 int os::recv(int fd, char *buf, int nBytes, int flags) { 6353 INTERRUPTIBLE_RETURN_INT(::recv(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6354 } 6355 6356 6357 int os::send(int fd, char *buf, int nBytes, int flags) { 6358 INTERRUPTIBLE_RETURN_INT(::send(fd, buf, nBytes, flags), os::Solaris::clear_interrupted); 6359 } 6360 6361 int os::raw_send(int fd, char *buf, int nBytes, int flags) { 6362 RESTARTABLE_RETURN_INT(::send(fd, buf, nBytes, flags)); 6363 } 6364 6365 // As both poll and select can be interrupted by signals, we have to be 6366 // prepared to restart the system call after updating the timeout, unless 6367 // a poll() is done with timeout == -1, in which case we repeat with this 6368 // "wait forever" value. 6369 6370 int os::timeout(int fd, long timeout) { 6371 int res; 6372 struct timeval t; 6373 julong prevtime, newtime; 6374 static const char* aNull = 0; 6375 struct pollfd pfd; 6376 pfd.fd = fd; 6377 pfd.events = POLLIN; 6378 6379 gettimeofday(&t, &aNull); 6380 prevtime = ((julong)t.tv_sec * 1000) + t.tv_usec / 1000; 6381 6382 for(;;) { 6383 INTERRUPTIBLE_NORESTART(::poll(&pfd, 1, timeout), res, os::Solaris::clear_interrupted); 6384 if(res == OS_ERR && errno == EINTR) { 6385 if(timeout != -1) { 6386 gettimeofday(&t, &aNull); 6387 newtime = ((julong)t.tv_sec * 1000) + t.tv_usec /1000; 6388 timeout -= newtime - prevtime; 6389 if(timeout <= 0) 6390 return OS_OK; 6391 prevtime = newtime; 6392 } 6393 } else return res; 6394 } 6395 } 6396 6397 int os::connect(int fd, struct sockaddr *him, int len) { 6398 int _result; 6399 INTERRUPTIBLE_NORESTART(::connect(fd, him, len), _result, 6400 os::Solaris::clear_interrupted); 6401 6402 // Depending on when thread interruption is reset, _result could be 6403 // one of two values when errno == EINTR 6404 6405 if (((_result == OS_INTRPT) || (_result == OS_ERR)) 6406 && (errno == EINTR)) { 6407 /* restarting a connect() changes its errno semantics */ 6408 INTERRUPTIBLE(::connect(fd, him, len), _result, 6409 os::Solaris::clear_interrupted); 6410 /* undo these changes */ 6411 if (_result == OS_ERR) { 6412 if (errno == EALREADY) { 6413 errno = EINPROGRESS; /* fall through */ 6414 } else if (errno == EISCONN) { 6415 errno = 0; 6416 return OS_OK; 6417 } 6418 } 6419 } 6420 return _result; 6421 } 6422 6423 int os::accept(int fd, struct sockaddr *him, int *len) { 6424 if (fd < 0) 6425 return OS_ERR; 6426 INTERRUPTIBLE_RETURN_INT((int)::accept(fd, him,\ 6427 (socklen_t*) len), os::Solaris::clear_interrupted); 6428 } 6429 6430 int os::recvfrom(int fd, char *buf, int nBytes, int flags, 6431 sockaddr *from, int *fromlen) { 6432 //%%note jvm_r11 6433 INTERRUPTIBLE_RETURN_INT((int)::recvfrom(fd, buf, nBytes,\ 6434 flags, from, fromlen), os::Solaris::clear_interrupted); 6435 } 6436 6437 int os::sendto(int fd, char *buf, int len, int flags, 6438 struct sockaddr *to, int tolen) { 6439 //%%note jvm_r11 6440 INTERRUPTIBLE_RETURN_INT((int)::sendto(fd, buf, len, flags,\ 6441 to, tolen), os::Solaris::clear_interrupted); 6442 } 6443 6444 int os::socket_available(int fd, jint *pbytes) { 6445 if (fd < 0) 6446 return OS_OK; 6447 6448 int ret; 6449 6450 RESTARTABLE(::ioctl(fd, FIONREAD, pbytes), ret); 6451 6452 //%% note ioctl can return 0 when successful, JVM_SocketAvailable 6453 // is expected to return 0 on failure and 1 on success to the jdk. 6454 6455 return (ret == OS_ERR) ? 0 : 1; 6456 } 6457 6458 6459 int os::bind(int fd, struct sockaddr *him, int len) { 6460 INTERRUPTIBLE_RETURN_INT_NORESTART(::bind(fd, him, len),\ 6461 os::Solaris::clear_interrupted); 6462 }