os_solaris.cpp revision 579:0fbdb4381b99
1/* 2 * Copyright 1997-2009 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25// do not include precompiled header file 26# include "incls/_os_solaris.cpp.incl" 27 28// put OS-includes here 29# include <dlfcn.h> 30# include <errno.h> 31# include <link.h> 32# include <poll.h> 33# include <pthread.h> 34# include <pwd.h> 35# include <schedctl.h> 36# include <setjmp.h> 37# include <signal.h> 38# include <stdio.h> 39# include <alloca.h> 40# include <sys/filio.h> 41# include <sys/ipc.h> 42# include <sys/lwp.h> 43# include <sys/machelf.h> // for elf Sym structure used by dladdr1 44# include <sys/mman.h> 45# include <sys/processor.h> 46# include <sys/procset.h> 47# include <sys/pset.h> 48# include <sys/resource.h> 49# include <sys/shm.h> 50# include <sys/socket.h> 51# include <sys/stat.h> 52# include <sys/systeminfo.h> 53# include <sys/time.h> 54# include <sys/times.h> 55# include <sys/types.h> 56# include <sys/wait.h> 57# include <sys/utsname.h> 58# include <thread.h> 59# include <unistd.h> 60# include <sys/priocntl.h> 61# include <sys/rtpriocntl.h> 62# include <sys/tspriocntl.h> 63# include <sys/iapriocntl.h> 64# include <sys/loadavg.h> 65# include <string.h> 66 67# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 68# include <sys/procfs.h> // see comment in <sys/procfs.h> 69 70#define MAX_PATH (2 * K) 71 72// for timer info max values which include all bits 73#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 74 75#ifdef _GNU_SOURCE 76// See bug #6514594 77extern "C" int madvise(caddr_t, size_t, int); 78extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 79 int attr, int mask); 80#endif //_GNU_SOURCE 81 82/* 83 MPSS Changes Start. 84 The JVM binary needs to be built and run on pre-Solaris 9 85 systems, but the constants needed by MPSS are only in Solaris 9 86 header files. They are textually replicated here to allow 87 building on earlier systems. Once building on Solaris 8 is 88 no longer a requirement, these #defines can be replaced by ordinary 89 system .h inclusion. 90 91 In earlier versions of the JDK and Solaris, we used ISM for large pages. 92 But ISM requires shared memory to achieve this and thus has many caveats. 93 MPSS is a fully transparent and is a cleaner way to get large pages. 94 Although we still require keeping ISM for backward compatiblitiy as well as 95 giving the opportunity to use large pages on older systems it is 96 recommended that MPSS be used for Solaris 9 and above. 97 98*/ 99 100#ifndef MC_HAT_ADVISE 101 102struct memcntl_mha { 103 uint_t mha_cmd; /* command(s) */ 104 uint_t mha_flags; 105 size_t mha_pagesize; 106}; 107#define MC_HAT_ADVISE 7 /* advise hat map size */ 108#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 109#define MAP_ALIGN 0x200 /* addr specifies alignment */ 110 111#endif 112// MPSS Changes End. 113 114 115// Here are some liblgrp types from sys/lgrp_user.h to be able to 116// compile on older systems without this header file. 117 118#ifndef MADV_ACCESS_LWP 119# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 120#endif 121#ifndef MADV_ACCESS_MANY 122# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 123#endif 124 125#ifndef LGRP_RSRC_CPU 126# define LGRP_RSRC_CPU 0 /* CPU resources */ 127#endif 128#ifndef LGRP_RSRC_MEM 129# define LGRP_RSRC_MEM 1 /* memory resources */ 130#endif 131 132// Some more macros from sys/mman.h that are not present in Solaris 8. 133 134#ifndef MAX_MEMINFO_CNT 135/* 136 * info_req request type definitions for meminfo 137 * request types starting with MEMINFO_V are used for Virtual addresses 138 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 139 * addresses 140 */ 141# define MEMINFO_SHIFT 16 142# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 143# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 144# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 145# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 146# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 147# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 148# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 149# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 150 151/* maximum number of addresses meminfo() can process at a time */ 152# define MAX_MEMINFO_CNT 256 153 154/* maximum number of request types */ 155# define MAX_MEMINFO_REQ 31 156#endif 157 158// see thr_setprio(3T) for the basis of these numbers 159#define MinimumPriority 0 160#define NormalPriority 64 161#define MaximumPriority 127 162 163// Values for ThreadPriorityPolicy == 1 164int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 165 80, 96, 112, 124, 127 }; 166 167// System parameters used internally 168static clock_t clock_tics_per_sec = 100; 169 170// For diagnostics to print a message once. see run_periodic_checks 171static bool check_addr0_done = false; 172static sigset_t check_signal_done; 173static bool check_signals = true; 174 175address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 176address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 177 178address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 179 180 181// "default" initializers for missing libc APIs 182extern "C" { 183 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 184 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 185 186 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 187 static int lwp_cond_destroy(cond_t *cv) { return 0; } 188} 189 190// "default" initializers for pthread-based synchronization 191extern "C" { 192 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 193 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 194} 195 196// Thread Local Storage 197// This is common to all Solaris platforms so it is defined here, 198// in this common file. 199// The declarations are in the os_cpu threadLS*.hpp files. 200// 201// Static member initialization for TLS 202Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 203 204#ifndef PRODUCT 205#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 206 207int ThreadLocalStorage::_tcacheHit = 0; 208int ThreadLocalStorage::_tcacheMiss = 0; 209 210void ThreadLocalStorage::print_statistics() { 211 int total = _tcacheMiss+_tcacheHit; 212 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 213 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 214} 215#undef _PCT 216#endif // PRODUCT 217 218Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 219 int index) { 220 Thread *thread = get_thread_slow(); 221 if (thread != NULL) { 222 address sp = os::current_stack_pointer(); 223 guarantee(thread->_stack_base == NULL || 224 (sp <= thread->_stack_base && 225 sp >= thread->_stack_base - thread->_stack_size) || 226 is_error_reported(), 227 "sp must be inside of selected thread stack"); 228 229 thread->_self_raw_id = raw_id; // mark for quick retrieval 230 _get_thread_cache[ index ] = thread; 231 } 232 return thread; 233} 234 235 236static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 237#define NO_CACHED_THREAD ((Thread*)all_zero) 238 239void ThreadLocalStorage::pd_set_thread(Thread* thread) { 240 241 // Store the new value before updating the cache to prevent a race 242 // between get_thread_via_cache_slowly() and this store operation. 243 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 244 245 // Update thread cache with new thread if setting on thread create, 246 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 247 uintptr_t raw = pd_raw_thread_id(); 248 int ix = pd_cache_index(raw); 249 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 250} 251 252void ThreadLocalStorage::pd_init() { 253 for (int i = 0; i < _pd_cache_size; i++) { 254 _get_thread_cache[i] = NO_CACHED_THREAD; 255 } 256} 257 258// Invalidate all the caches (happens to be the same as pd_init). 259void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 260 261#undef NO_CACHED_THREAD 262 263// END Thread Local Storage 264 265static inline size_t adjust_stack_size(address base, size_t size) { 266 if ((ssize_t)size < 0) { 267 // 4759953: Compensate for ridiculous stack size. 268 size = max_intx; 269 } 270 if (size > (size_t)base) { 271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 272 size = (size_t)base; 273 } 274 return size; 275} 276 277static inline stack_t get_stack_info() { 278 stack_t st; 279 int retval = thr_stksegment(&st); 280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 281 assert(retval == 0, "incorrect return value from thr_stksegment"); 282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 284 return st; 285} 286 287address os::current_stack_base() { 288 int r = thr_main() ; 289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 290 bool is_primordial_thread = r; 291 292 // Workaround 4352906, avoid calls to thr_stksegment by 293 // thr_main after the first one (it looks like we trash 294 // some data, causing the value for ss_sp to be incorrect). 295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 296 stack_t st = get_stack_info(); 297 if (is_primordial_thread) { 298 // cache initial value of stack base 299 os::Solaris::_main_stack_base = (address)st.ss_sp; 300 } 301 return (address)st.ss_sp; 302 } else { 303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 304 return os::Solaris::_main_stack_base; 305 } 306} 307 308size_t os::current_stack_size() { 309 size_t size; 310 311 int r = thr_main() ; 312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 313 if(!r) { 314 size = get_stack_info().ss_size; 315 } else { 316 struct rlimit limits; 317 getrlimit(RLIMIT_STACK, &limits); 318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 319 } 320 // base may not be page aligned 321 address base = current_stack_base(); 322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 323 return (size_t)(base - bottom); 324} 325 326struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 327 return localtime_r(clock, res); 328} 329 330// interruptible infrastructure 331 332// setup_interruptible saves the thread state before going into an 333// interruptible system call. 334// The saved state is used to restore the thread to 335// its former state whether or not an interrupt is received. 336// Used by classloader os::read 337// hpi calls skip this layer and stay in _thread_in_native 338 339void os::Solaris::setup_interruptible(JavaThread* thread) { 340 341 JavaThreadState thread_state = thread->thread_state(); 342 343 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 344 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 345 OSThread* osthread = thread->osthread(); 346 osthread->set_saved_interrupt_thread_state(thread_state); 347 thread->frame_anchor()->make_walkable(thread); 348 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 349} 350 351// Version of setup_interruptible() for threads that are already in 352// _thread_blocked. Used by os_sleep(). 353void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 354 thread->frame_anchor()->make_walkable(thread); 355} 356 357JavaThread* os::Solaris::setup_interruptible() { 358 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 359 setup_interruptible(thread); 360 return thread; 361} 362 363void os::Solaris::try_enable_extended_io() { 364 typedef int (*enable_extended_FILE_stdio_t)(int, int); 365 366 if (!UseExtendedFileIO) { 367 return; 368 } 369 370 enable_extended_FILE_stdio_t enabler = 371 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 372 "enable_extended_FILE_stdio"); 373 if (enabler) { 374 enabler(-1, -1); 375 } 376} 377 378 379#ifdef ASSERT 380 381JavaThread* os::Solaris::setup_interruptible_native() { 382 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 383 JavaThreadState thread_state = thread->thread_state(); 384 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 385 return thread; 386} 387 388void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 389 JavaThreadState thread_state = thread->thread_state(); 390 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 391} 392#endif 393 394// cleanup_interruptible reverses the effects of setup_interruptible 395// setup_interruptible_already_blocked() does not need any cleanup. 396 397void os::Solaris::cleanup_interruptible(JavaThread* thread) { 398 OSThread* osthread = thread->osthread(); 399 400 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 401} 402 403// I/O interruption related counters called in _INTERRUPTIBLE 404 405void os::Solaris::bump_interrupted_before_count() { 406 RuntimeService::record_interrupted_before_count(); 407} 408 409void os::Solaris::bump_interrupted_during_count() { 410 RuntimeService::record_interrupted_during_count(); 411} 412 413static int _processors_online = 0; 414 415 jint os::Solaris::_os_thread_limit = 0; 416volatile jint os::Solaris::_os_thread_count = 0; 417 418julong os::available_memory() { 419 return Solaris::available_memory(); 420} 421 422julong os::Solaris::available_memory() { 423 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 424} 425 426julong os::Solaris::_physical_memory = 0; 427 428julong os::physical_memory() { 429 return Solaris::physical_memory(); 430} 431 432julong os::allocatable_physical_memory(julong size) { 433#ifdef _LP64 434 return size; 435#else 436 julong result = MIN2(size, (julong)3835*M); 437 if (!is_allocatable(result)) { 438 // Memory allocations will be aligned but the alignment 439 // is not known at this point. Alignments will 440 // be at most to LargePageSizeInBytes. Protect 441 // allocations from alignments up to illegal 442 // values. If at this point 2G is illegal. 443 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 444 result = MIN2(size, reasonable_size); 445 } 446 return result; 447#endif 448} 449 450static hrtime_t first_hrtime = 0; 451static const hrtime_t hrtime_hz = 1000*1000*1000; 452const int LOCK_BUSY = 1; 453const int LOCK_FREE = 0; 454const int LOCK_INVALID = -1; 455static volatile hrtime_t max_hrtime = 0; 456static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 457 458 459void os::Solaris::initialize_system_info() { 460 _processor_count = sysconf(_SC_NPROCESSORS_CONF); 461 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 462 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 463} 464 465int os::active_processor_count() { 466 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 467 pid_t pid = getpid(); 468 psetid_t pset = PS_NONE; 469 // Are we running in a processor set or is there any processor set around? 470 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 471 uint_t pset_cpus; 472 // Query the number of cpus available to us. 473 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 474 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 475 _processors_online = pset_cpus; 476 return pset_cpus; 477 } 478 } 479 // Otherwise return number of online cpus 480 return online_cpus; 481} 482 483static bool find_processors_in_pset(psetid_t pset, 484 processorid_t** id_array, 485 uint_t* id_length) { 486 bool result = false; 487 // Find the number of processors in the processor set. 488 if (pset_info(pset, NULL, id_length, NULL) == 0) { 489 // Make up an array to hold their ids. 490 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 491 // Fill in the array with their processor ids. 492 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 493 result = true; 494 } 495 } 496 return result; 497} 498 499// Callers of find_processors_online() must tolerate imprecise results -- 500// the system configuration can change asynchronously because of DR 501// or explicit psradm operations. 502// 503// We also need to take care that the loop (below) terminates as the 504// number of processors online can change between the _SC_NPROCESSORS_ONLN 505// request and the loop that builds the list of processor ids. Unfortunately 506// there's no reliable way to determine the maximum valid processor id, 507// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 508// man pages, which claim the processor id set is "sparse, but 509// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 510// exit the loop. 511// 512// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 513// not available on S8.0. 514 515static bool find_processors_online(processorid_t** id_array, 516 uint* id_length) { 517 const processorid_t MAX_PROCESSOR_ID = 100000 ; 518 // Find the number of processors online. 519 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 520 // Make up an array to hold their ids. 521 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 522 // Processors need not be numbered consecutively. 523 long found = 0; 524 processorid_t next = 0; 525 while (found < *id_length && next < MAX_PROCESSOR_ID) { 526 processor_info_t info; 527 if (processor_info(next, &info) == 0) { 528 // NB, PI_NOINTR processors are effectively online ... 529 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 530 (*id_array)[found] = next; 531 found += 1; 532 } 533 } 534 next += 1; 535 } 536 if (found < *id_length) { 537 // The loop above didn't identify the expected number of processors. 538 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 539 // and re-running the loop, above, but there's no guarantee of progress 540 // if the system configuration is in flux. Instead, we just return what 541 // we've got. Note that in the worst case find_processors_online() could 542 // return an empty set. (As a fall-back in the case of the empty set we 543 // could just return the ID of the current processor). 544 *id_length = found ; 545 } 546 547 return true; 548} 549 550static bool assign_distribution(processorid_t* id_array, 551 uint id_length, 552 uint* distribution, 553 uint distribution_length) { 554 // We assume we can assign processorid_t's to uint's. 555 assert(sizeof(processorid_t) == sizeof(uint), 556 "can't convert processorid_t to uint"); 557 // Quick check to see if we won't succeed. 558 if (id_length < distribution_length) { 559 return false; 560 } 561 // Assign processor ids to the distribution. 562 // Try to shuffle processors to distribute work across boards, 563 // assuming 4 processors per board. 564 const uint processors_per_board = ProcessDistributionStride; 565 // Find the maximum processor id. 566 processorid_t max_id = 0; 567 for (uint m = 0; m < id_length; m += 1) { 568 max_id = MAX2(max_id, id_array[m]); 569 } 570 // The next id, to limit loops. 571 const processorid_t limit_id = max_id + 1; 572 // Make up markers for available processors. 573 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 574 for (uint c = 0; c < limit_id; c += 1) { 575 available_id[c] = false; 576 } 577 for (uint a = 0; a < id_length; a += 1) { 578 available_id[id_array[a]] = true; 579 } 580 // Step by "boards", then by "slot", copying to "assigned". 581 // NEEDS_CLEANUP: The assignment of processors should be stateful, 582 // remembering which processors have been assigned by 583 // previous calls, etc., so as to distribute several 584 // independent calls of this method. What we'd like is 585 // It would be nice to have an API that let us ask 586 // how many processes are bound to a processor, 587 // but we don't have that, either. 588 // In the short term, "board" is static so that 589 // subsequent distributions don't all start at board 0. 590 static uint board = 0; 591 uint assigned = 0; 592 // Until we've found enough processors .... 593 while (assigned < distribution_length) { 594 // ... find the next available processor in the board. 595 for (uint slot = 0; slot < processors_per_board; slot += 1) { 596 uint try_id = board * processors_per_board + slot; 597 if ((try_id < limit_id) && (available_id[try_id] == true)) { 598 distribution[assigned] = try_id; 599 available_id[try_id] = false; 600 assigned += 1; 601 break; 602 } 603 } 604 board += 1; 605 if (board * processors_per_board + 0 >= limit_id) { 606 board = 0; 607 } 608 } 609 if (available_id != NULL) { 610 FREE_C_HEAP_ARRAY(bool, available_id); 611 } 612 return true; 613} 614 615bool os::distribute_processes(uint length, uint* distribution) { 616 bool result = false; 617 // Find the processor id's of all the available CPUs. 618 processorid_t* id_array = NULL; 619 uint id_length = 0; 620 // There are some races between querying information and using it, 621 // since processor sets can change dynamically. 622 psetid_t pset = PS_NONE; 623 // Are we running in a processor set? 624 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 625 result = find_processors_in_pset(pset, &id_array, &id_length); 626 } else { 627 result = find_processors_online(&id_array, &id_length); 628 } 629 if (result == true) { 630 if (id_length >= length) { 631 result = assign_distribution(id_array, id_length, distribution, length); 632 } else { 633 result = false; 634 } 635 } 636 if (id_array != NULL) { 637 FREE_C_HEAP_ARRAY(processorid_t, id_array); 638 } 639 return result; 640} 641 642bool os::bind_to_processor(uint processor_id) { 643 // We assume that a processorid_t can be stored in a uint. 644 assert(sizeof(uint) == sizeof(processorid_t), 645 "can't convert uint to processorid_t"); 646 int bind_result = 647 processor_bind(P_LWPID, // bind LWP. 648 P_MYID, // bind current LWP. 649 (processorid_t) processor_id, // id. 650 NULL); // don't return old binding. 651 return (bind_result == 0); 652} 653 654bool os::getenv(const char* name, char* buffer, int len) { 655 char* val = ::getenv( name ); 656 if ( val == NULL 657 || strlen(val) + 1 > len ) { 658 if (len > 0) buffer[0] = 0; // return a null string 659 return false; 660 } 661 strcpy( buffer, val ); 662 return true; 663} 664 665 666// Return true if user is running as root. 667 668bool os::have_special_privileges() { 669 static bool init = false; 670 static bool privileges = false; 671 if (!init) { 672 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 673 init = true; 674 } 675 return privileges; 676} 677 678 679static char* get_property(char* name, char* buffer, int buffer_size) { 680 if (os::getenv(name, buffer, buffer_size)) { 681 return buffer; 682 } 683 static char empty[] = ""; 684 return empty; 685} 686 687 688void os::init_system_properties_values() { 689 char arch[12]; 690 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 691 692 // The next steps are taken in the product version: 693 // 694 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 695 // This library should be located at: 696 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 697 // 698 // If "/jre/lib/" appears at the right place in the path, then we 699 // assume libjvm[_g].so is installed in a JDK and we use this path. 700 // 701 // Otherwise exit with message: "Could not create the Java virtual machine." 702 // 703 // The following extra steps are taken in the debugging version: 704 // 705 // If "/jre/lib/" does NOT appear at the right place in the path 706 // instead of exit check for $JAVA_HOME environment variable. 707 // 708 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 709 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 710 // it looks like libjvm[_g].so is installed there 711 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 712 // 713 // Otherwise exit. 714 // 715 // Important note: if the location of libjvm.so changes this 716 // code needs to be changed accordingly. 717 718 // The next few definitions allow the code to be verbatim: 719#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 720#define free(p) FREE_C_HEAP_ARRAY(char, p) 721#define getenv(n) ::getenv(n) 722 723#define EXTENSIONS_DIR "/lib/ext" 724#define ENDORSED_DIR "/lib/endorsed" 725#define COMMON_DIR "/usr/jdk/packages" 726 727 { 728 /* sysclasspath, java_home, dll_dir */ 729 { 730 char *home_path; 731 char *dll_path; 732 char *pslash; 733 char buf[MAXPATHLEN]; 734 os::jvm_path(buf, sizeof(buf)); 735 736 // Found the full path to libjvm.so. 737 // Now cut the path to <java_home>/jre if we can. 738 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 739 pslash = strrchr(buf, '/'); 740 if (pslash != NULL) 741 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 742 dll_path = malloc(strlen(buf) + 1); 743 if (dll_path == NULL) 744 return; 745 strcpy(dll_path, buf); 746 Arguments::set_dll_dir(dll_path); 747 748 if (pslash != NULL) { 749 pslash = strrchr(buf, '/'); 750 if (pslash != NULL) { 751 *pslash = '\0'; /* get rid of /<arch> */ 752 pslash = strrchr(buf, '/'); 753 if (pslash != NULL) 754 *pslash = '\0'; /* get rid of /lib */ 755 } 756 } 757 758 home_path = malloc(strlen(buf) + 1); 759 if (home_path == NULL) 760 return; 761 strcpy(home_path, buf); 762 Arguments::set_java_home(home_path); 763 764 if (!set_boot_path('/', ':')) 765 return; 766 } 767 768 /* 769 * Where to look for native libraries 770 */ 771 { 772 // Use dlinfo() to determine the correct java.library.path. 773 // 774 // If we're launched by the Java launcher, and the user 775 // does not set java.library.path explicitly on the commandline, 776 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 777 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 778 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 779 // /usr/lib), which is exactly what we want. 780 // 781 // If the user does set java.library.path, it completely 782 // overwrites this setting, and always has. 783 // 784 // If we're not launched by the Java launcher, we may 785 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 786 // settings. Again, dlinfo does exactly what we want. 787 788 Dl_serinfo _info, *info = &_info; 789 Dl_serpath *path; 790 char* library_path; 791 char *common_path; 792 int i; 793 794 // determine search path count and required buffer size 795 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 796 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 797 } 798 799 // allocate new buffer and initialize 800 info = (Dl_serinfo*)malloc(_info.dls_size); 801 if (info == NULL) { 802 vm_exit_out_of_memory(_info.dls_size, 803 "init_system_properties_values info"); 804 } 805 info->dls_size = _info.dls_size; 806 info->dls_cnt = _info.dls_cnt; 807 808 // obtain search path information 809 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 810 free(info); 811 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 812 } 813 814 path = &info->dls_serpath[0]; 815 816 // Note: Due to a legacy implementation, most of the library path 817 // is set in the launcher. This was to accomodate linking restrictions 818 // on legacy Solaris implementations (which are no longer supported). 819 // Eventually, all the library path setting will be done here. 820 // 821 // However, to prevent the proliferation of improperly built native 822 // libraries, the new path component /usr/jdk/packages is added here. 823 824 // Determine the actual CPU architecture. 825 char cpu_arch[12]; 826 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 827#ifdef _LP64 828 // If we are a 64-bit vm, perform the following translations: 829 // sparc -> sparcv9 830 // i386 -> amd64 831 if (strcmp(cpu_arch, "sparc") == 0) 832 strcat(cpu_arch, "v9"); 833 else if (strcmp(cpu_arch, "i386") == 0) 834 strcpy(cpu_arch, "amd64"); 835#endif 836 837 // Construct the invariant part of ld_library_path. Note that the 838 // space for the colon and the trailing null are provided by the 839 // nulls included by the sizeof operator. 840 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 841 common_path = malloc(bufsize); 842 if (common_path == NULL) { 843 free(info); 844 vm_exit_out_of_memory(bufsize, 845 "init_system_properties_values common_path"); 846 } 847 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 848 849 // struct size is more than sufficient for the path components obtained 850 // through the dlinfo() call, so only add additional space for the path 851 // components explicitly added here. 852 bufsize = info->dls_size + strlen(common_path); 853 library_path = malloc(bufsize); 854 if (library_path == NULL) { 855 free(info); 856 free(common_path); 857 vm_exit_out_of_memory(bufsize, 858 "init_system_properties_values library_path"); 859 } 860 library_path[0] = '\0'; 861 862 // Construct the desired Java library path from the linker's library 863 // search path. 864 // 865 // For compatibility, it is optimal that we insert the additional path 866 // components specific to the Java VM after those components specified 867 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 868 // infrastructure. 869 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 870 strcpy(library_path, common_path); 871 } else { 872 int inserted = 0; 873 for (i = 0; i < info->dls_cnt; i++, path++) { 874 uint_t flags = path->dls_flags & LA_SER_MASK; 875 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 876 strcat(library_path, common_path); 877 strcat(library_path, os::path_separator()); 878 inserted = 1; 879 } 880 strcat(library_path, path->dls_name); 881 strcat(library_path, os::path_separator()); 882 } 883 // eliminate trailing path separator 884 library_path[strlen(library_path)-1] = '\0'; 885 } 886 887 // happens before argument parsing - can't use a trace flag 888 // tty->print_raw("init_system_properties_values: native lib path: "); 889 // tty->print_raw_cr(library_path); 890 891 // callee copies into its own buffer 892 Arguments::set_library_path(library_path); 893 894 free(common_path); 895 free(library_path); 896 free(info); 897 } 898 899 /* 900 * Extensions directories. 901 * 902 * Note that the space for the colon and the trailing null are provided 903 * by the nulls included by the sizeof operator (so actually one byte more 904 * than necessary is allocated). 905 */ 906 { 907 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 908 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 909 sizeof(EXTENSIONS_DIR)); 910 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 911 Arguments::get_java_home()); 912 Arguments::set_ext_dirs(buf); 913 } 914 915 /* Endorsed standards default directory. */ 916 { 917 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 918 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 919 Arguments::set_endorsed_dirs(buf); 920 } 921 } 922 923#undef malloc 924#undef free 925#undef getenv 926#undef EXTENSIONS_DIR 927#undef ENDORSED_DIR 928#undef COMMON_DIR 929 930} 931 932void os::breakpoint() { 933 BREAKPOINT; 934} 935 936bool os::obsolete_option(const JavaVMOption *option) 937{ 938 if (!strncmp(option->optionString, "-Xt", 3)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 941 return true; 942 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 943 return true; 944 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 945 return true; 946 } 947 return false; 948} 949 950bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 951 address stackStart = (address)thread->stack_base(); 952 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 953 if (sp < stackStart && sp >= stackEnd ) return true; 954 return false; 955} 956 957extern "C" void breakpoint() { 958 // use debugger to set breakpoint here 959} 960 961// Returns an estimate of the current stack pointer. Result must be guaranteed to 962// point into the calling threads stack, and be no lower than the current stack 963// pointer. 964address os::current_stack_pointer() { 965 volatile int dummy; 966 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 967 return sp; 968} 969 970static thread_t main_thread; 971 972// Thread start routine for all new Java threads 973extern "C" void* java_start(void* thread_addr) { 974 // Try to randomize the cache line index of hot stack frames. 975 // This helps when threads of the same stack traces evict each other's 976 // cache lines. The threads can be either from the same JVM instance, or 977 // from different JVM instances. The benefit is especially true for 978 // processors with hyperthreading technology. 979 static int counter = 0; 980 int pid = os::current_process_id(); 981 alloca(((pid ^ counter++) & 7) * 128); 982 983 int prio; 984 Thread* thread = (Thread*)thread_addr; 985 OSThread* osthr = thread->osthread(); 986 987 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 988 thread->_schedctl = (void *) schedctl_init () ; 989 990 if (UseNUMA) { 991 int lgrp_id = os::numa_get_group_id(); 992 if (lgrp_id != -1) { 993 thread->set_lgrp_id(lgrp_id); 994 } 995 } 996 997 // If the creator called set priority before we started, 998 // we need to call set priority now that we have an lwp. 999 // Get the priority from libthread and set the priority 1000 // for the new Solaris lwp. 1001 if ( osthr->thread_id() != -1 ) { 1002 if ( UseThreadPriorities ) { 1003 thr_getprio(osthr->thread_id(), &prio); 1004 if (ThreadPriorityVerbose) { 1005 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1006 osthr->thread_id(), osthr->lwp_id(), prio ); 1007 } 1008 os::set_native_priority(thread, prio); 1009 } 1010 } else if (ThreadPriorityVerbose) { 1011 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1012 } 1013 1014 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1015 1016 // initialize signal mask for this thread 1017 os::Solaris::hotspot_sigmask(thread); 1018 1019 thread->run(); 1020 1021 // One less thread is executing 1022 // When the VMThread gets here, the main thread may have already exited 1023 // which frees the CodeHeap containing the Atomic::dec code 1024 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1025 Atomic::dec(&os::Solaris::_os_thread_count); 1026 } 1027 1028 if (UseDetachedThreads) { 1029 thr_exit(NULL); 1030 ShouldNotReachHere(); 1031 } 1032 return NULL; 1033} 1034 1035static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1036 // Allocate the OSThread object 1037 OSThread* osthread = new OSThread(NULL, NULL); 1038 if (osthread == NULL) return NULL; 1039 1040 // Store info on the Solaris thread into the OSThread 1041 osthread->set_thread_id(thread_id); 1042 osthread->set_lwp_id(_lwp_self()); 1043 thread->_schedctl = (void *) schedctl_init () ; 1044 1045 if (UseNUMA) { 1046 int lgrp_id = os::numa_get_group_id(); 1047 if (lgrp_id != -1) { 1048 thread->set_lgrp_id(lgrp_id); 1049 } 1050 } 1051 1052 if ( ThreadPriorityVerbose ) { 1053 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1054 osthread->thread_id(), osthread->lwp_id() ); 1055 } 1056 1057 // Initial thread state is INITIALIZED, not SUSPENDED 1058 osthread->set_state(INITIALIZED); 1059 1060 return osthread; 1061} 1062 1063void os::Solaris::hotspot_sigmask(Thread* thread) { 1064 1065 //Save caller's signal mask 1066 sigset_t sigmask; 1067 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1068 OSThread *osthread = thread->osthread(); 1069 osthread->set_caller_sigmask(sigmask); 1070 1071 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1072 if (!ReduceSignalUsage) { 1073 if (thread->is_VM_thread()) { 1074 // Only the VM thread handles BREAK_SIGNAL ... 1075 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1076 } else { 1077 // ... all other threads block BREAK_SIGNAL 1078 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1079 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1080 } 1081 } 1082} 1083 1084bool os::create_attached_thread(JavaThread* thread) { 1085#ifdef ASSERT 1086 thread->verify_not_published(); 1087#endif 1088 OSThread* osthread = create_os_thread(thread, thr_self()); 1089 if (osthread == NULL) { 1090 return false; 1091 } 1092 1093 // Initial thread state is RUNNABLE 1094 osthread->set_state(RUNNABLE); 1095 thread->set_osthread(osthread); 1096 1097 // initialize signal mask for this thread 1098 // and save the caller's signal mask 1099 os::Solaris::hotspot_sigmask(thread); 1100 1101 return true; 1102} 1103 1104bool os::create_main_thread(JavaThread* thread) { 1105#ifdef ASSERT 1106 thread->verify_not_published(); 1107#endif 1108 if (_starting_thread == NULL) { 1109 _starting_thread = create_os_thread(thread, main_thread); 1110 if (_starting_thread == NULL) { 1111 return false; 1112 } 1113 } 1114 1115 // The primodial thread is runnable from the start 1116 _starting_thread->set_state(RUNNABLE); 1117 1118 thread->set_osthread(_starting_thread); 1119 1120 // initialize signal mask for this thread 1121 // and save the caller's signal mask 1122 os::Solaris::hotspot_sigmask(thread); 1123 1124 return true; 1125} 1126 1127// _T2_libthread is true if we believe we are running with the newer 1128// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1129bool os::Solaris::_T2_libthread = false; 1130 1131bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1132 // Allocate the OSThread object 1133 OSThread* osthread = new OSThread(NULL, NULL); 1134 if (osthread == NULL) { 1135 return false; 1136 } 1137 1138 if ( ThreadPriorityVerbose ) { 1139 char *thrtyp; 1140 switch ( thr_type ) { 1141 case vm_thread: 1142 thrtyp = (char *)"vm"; 1143 break; 1144 case cgc_thread: 1145 thrtyp = (char *)"cgc"; 1146 break; 1147 case pgc_thread: 1148 thrtyp = (char *)"pgc"; 1149 break; 1150 case java_thread: 1151 thrtyp = (char *)"java"; 1152 break; 1153 case compiler_thread: 1154 thrtyp = (char *)"compiler"; 1155 break; 1156 case watcher_thread: 1157 thrtyp = (char *)"watcher"; 1158 break; 1159 default: 1160 thrtyp = (char *)"unknown"; 1161 break; 1162 } 1163 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1164 } 1165 1166 // Calculate stack size if it's not specified by caller. 1167 if (stack_size == 0) { 1168 // The default stack size 1M (2M for LP64). 1169 stack_size = (BytesPerWord >> 2) * K * K; 1170 1171 switch (thr_type) { 1172 case os::java_thread: 1173 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1174 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1175 break; 1176 case os::compiler_thread: 1177 if (CompilerThreadStackSize > 0) { 1178 stack_size = (size_t)(CompilerThreadStackSize * K); 1179 break; 1180 } // else fall through: 1181 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1182 case os::vm_thread: 1183 case os::pgc_thread: 1184 case os::cgc_thread: 1185 case os::watcher_thread: 1186 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1187 break; 1188 } 1189 } 1190 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1191 1192 // Initial state is ALLOCATED but not INITIALIZED 1193 osthread->set_state(ALLOCATED); 1194 1195 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1196 // We got lots of threads. Check if we still have some address space left. 1197 // Need to be at least 5Mb of unreserved address space. We do check by 1198 // trying to reserve some. 1199 const size_t VirtualMemoryBangSize = 20*K*K; 1200 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1201 if (mem == NULL) { 1202 delete osthread; 1203 return false; 1204 } else { 1205 // Release the memory again 1206 os::release_memory(mem, VirtualMemoryBangSize); 1207 } 1208 } 1209 1210 // Setup osthread because the child thread may need it. 1211 thread->set_osthread(osthread); 1212 1213 // Create the Solaris thread 1214 // explicit THR_BOUND for T2_libthread case in case 1215 // that assumption is not accurate, but our alternate signal stack 1216 // handling is based on it which must have bound threads 1217 thread_t tid = 0; 1218 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1219 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1220 (thr_type == vm_thread) || 1221 (thr_type == cgc_thread) || 1222 (thr_type == pgc_thread) || 1223 (thr_type == compiler_thread && BackgroundCompilation)) ? 1224 THR_BOUND : 0); 1225 int status; 1226 1227 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1228 // 1229 // On multiprocessors systems, libthread sometimes under-provisions our 1230 // process with LWPs. On a 30-way systems, for instance, we could have 1231 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1232 // to our process. This can result in under utilization of PEs. 1233 // I suspect the problem is related to libthread's LWP 1234 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1235 // upcall policy. 1236 // 1237 // The following code is palliative -- it attempts to ensure that our 1238 // process has sufficient LWPs to take advantage of multiple PEs. 1239 // Proper long-term cures include using user-level threads bound to LWPs 1240 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1241 // slight timing window with respect to sampling _os_thread_count, but 1242 // the race is benign. Also, we should periodically recompute 1243 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1244 // the number of PEs in our partition. You might be tempted to use 1245 // THR_NEW_LWP here, but I'd recommend against it as that could 1246 // result in undesirable growth of the libthread's LWP pool. 1247 // The fix below isn't sufficient; for instance, it doesn't take into count 1248 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1249 // 1250 // Some pathologies this scheme doesn't handle: 1251 // * Threads can block, releasing the LWPs. The LWPs can age out. 1252 // When a large number of threads become ready again there aren't 1253 // enough LWPs available to service them. This can occur when the 1254 // number of ready threads oscillates. 1255 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1256 // 1257 // Finally, we should call thr_setconcurrency() periodically to refresh 1258 // the LWP pool and thwart the LWP age-out mechanism. 1259 // The "+3" term provides a little slop -- we want to slightly overprovision. 1260 1261 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1262 if (!(flags & THR_BOUND)) { 1263 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1264 } 1265 } 1266 // Although this doesn't hurt, we should warn of undefined behavior 1267 // when using unbound T1 threads with schedctl(). This should never 1268 // happen, as the compiler and VM threads are always created bound 1269 DEBUG_ONLY( 1270 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1271 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1272 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1273 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1274 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1275 } 1276 ); 1277 1278 1279 // Mark that we don't have an lwp or thread id yet. 1280 // In case we attempt to set the priority before the thread starts. 1281 osthread->set_lwp_id(-1); 1282 osthread->set_thread_id(-1); 1283 1284 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1285 if (status != 0) { 1286 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1287 perror("os::create_thread"); 1288 } 1289 thread->set_osthread(NULL); 1290 // Need to clean up stuff we've allocated so far 1291 delete osthread; 1292 return false; 1293 } 1294 1295 Atomic::inc(&os::Solaris::_os_thread_count); 1296 1297 // Store info on the Solaris thread into the OSThread 1298 osthread->set_thread_id(tid); 1299 1300 // Remember that we created this thread so we can set priority on it 1301 osthread->set_vm_created(); 1302 1303 // Set the default thread priority otherwise use NormalPriority 1304 1305 if ( UseThreadPriorities ) { 1306 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1307 java_to_os_priority[NormPriority] : 1308 DefaultThreadPriority); 1309 } 1310 1311 // Initial thread state is INITIALIZED, not SUSPENDED 1312 osthread->set_state(INITIALIZED); 1313 1314 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1315 return true; 1316} 1317 1318/* defined for >= Solaris 10. This allows builds on earlier versions 1319 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1320 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1321 * and -XX:+UseAltSigs does nothing since these should have no conflict 1322 */ 1323#if !defined(SIGJVM1) 1324#define SIGJVM1 39 1325#define SIGJVM2 40 1326#endif 1327 1328debug_only(static bool signal_sets_initialized = false); 1329static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1330int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1331int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1332 1333bool os::Solaris::is_sig_ignored(int sig) { 1334 struct sigaction oact; 1335 sigaction(sig, (struct sigaction*)NULL, &oact); 1336 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1337 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1338 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1339 return true; 1340 else 1341 return false; 1342} 1343 1344// Note: SIGRTMIN is a macro that calls sysconf() so it will 1345// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1346static bool isJVM1available() { 1347 return SIGJVM1 < SIGRTMIN; 1348} 1349 1350void os::Solaris::signal_sets_init() { 1351 // Should also have an assertion stating we are still single-threaded. 1352 assert(!signal_sets_initialized, "Already initialized"); 1353 // Fill in signals that are necessarily unblocked for all threads in 1354 // the VM. Currently, we unblock the following signals: 1355 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1356 // by -Xrs (=ReduceSignalUsage)); 1357 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1358 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1359 // the dispositions or masks wrt these signals. 1360 // Programs embedding the VM that want to use the above signals for their 1361 // own purposes must, at this time, use the "-Xrs" option to prevent 1362 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1363 // (See bug 4345157, and other related bugs). 1364 // In reality, though, unblocking these signals is really a nop, since 1365 // these signals are not blocked by default. 1366 sigemptyset(&unblocked_sigs); 1367 sigemptyset(&allowdebug_blocked_sigs); 1368 sigaddset(&unblocked_sigs, SIGILL); 1369 sigaddset(&unblocked_sigs, SIGSEGV); 1370 sigaddset(&unblocked_sigs, SIGBUS); 1371 sigaddset(&unblocked_sigs, SIGFPE); 1372 1373 if (isJVM1available) { 1374 os::Solaris::set_SIGinterrupt(SIGJVM1); 1375 os::Solaris::set_SIGasync(SIGJVM2); 1376 } else if (UseAltSigs) { 1377 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1378 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1379 } else { 1380 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1381 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1382 } 1383 1384 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1385 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1386 1387 if (!ReduceSignalUsage) { 1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1389 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1391 } 1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1393 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1395 } 1396 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1397 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1398 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1399 } 1400 } 1401 // Fill in signals that are blocked by all but the VM thread. 1402 sigemptyset(&vm_sigs); 1403 if (!ReduceSignalUsage) 1404 sigaddset(&vm_sigs, BREAK_SIGNAL); 1405 debug_only(signal_sets_initialized = true); 1406 1407 // For diagnostics only used in run_periodic_checks 1408 sigemptyset(&check_signal_done); 1409} 1410 1411// These are signals that are unblocked while a thread is running Java. 1412// (For some reason, they get blocked by default.) 1413sigset_t* os::Solaris::unblocked_signals() { 1414 assert(signal_sets_initialized, "Not initialized"); 1415 return &unblocked_sigs; 1416} 1417 1418// These are the signals that are blocked while a (non-VM) thread is 1419// running Java. Only the VM thread handles these signals. 1420sigset_t* os::Solaris::vm_signals() { 1421 assert(signal_sets_initialized, "Not initialized"); 1422 return &vm_sigs; 1423} 1424 1425// These are signals that are blocked during cond_wait to allow debugger in 1426sigset_t* os::Solaris::allowdebug_blocked_signals() { 1427 assert(signal_sets_initialized, "Not initialized"); 1428 return &allowdebug_blocked_sigs; 1429} 1430 1431// First crack at OS-specific initialization, from inside the new thread. 1432void os::initialize_thread() { 1433 int r = thr_main() ; 1434 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1435 if (r) { 1436 JavaThread* jt = (JavaThread *)Thread::current(); 1437 assert(jt != NULL,"Sanity check"); 1438 size_t stack_size; 1439 address base = jt->stack_base(); 1440 if (Arguments::created_by_java_launcher()) { 1441 // Use 2MB to allow for Solaris 7 64 bit mode. 1442 stack_size = JavaThread::stack_size_at_create() == 0 1443 ? 2048*K : JavaThread::stack_size_at_create(); 1444 1445 // There are rare cases when we may have already used more than 1446 // the basic stack size allotment before this method is invoked. 1447 // Attempt to allow for a normally sized java_stack. 1448 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1449 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1450 } else { 1451 // 6269555: If we were not created by a Java launcher, i.e. if we are 1452 // running embedded in a native application, treat the primordial thread 1453 // as much like a native attached thread as possible. This means using 1454 // the current stack size from thr_stksegment(), unless it is too large 1455 // to reliably setup guard pages. A reasonable max size is 8MB. 1456 size_t current_size = current_stack_size(); 1457 // This should never happen, but just in case.... 1458 if (current_size == 0) current_size = 2 * K * K; 1459 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1460 } 1461 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1462 stack_size = (size_t)(base - bottom); 1463 1464 assert(stack_size > 0, "Stack size calculation problem"); 1465 1466 if (stack_size > jt->stack_size()) { 1467 NOT_PRODUCT( 1468 struct rlimit limits; 1469 getrlimit(RLIMIT_STACK, &limits); 1470 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1471 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1472 ) 1473 tty->print_cr( 1474 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1475 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1476 "See limit(1) to increase the stack size limit.", 1477 stack_size / K, jt->stack_size() / K); 1478 vm_exit(1); 1479 } 1480 assert(jt->stack_size() >= stack_size, 1481 "Attempt to map more stack than was allocated"); 1482 jt->set_stack_size(stack_size); 1483 } 1484 1485 // 5/22/01: Right now alternate signal stacks do not handle 1486 // throwing stack overflow exceptions, see bug 4463178 1487 // Until a fix is found for this, T2 will NOT imply alternate signal 1488 // stacks. 1489 // If using T2 libthread threads, install an alternate signal stack. 1490 // Because alternate stacks associate with LWPs on Solaris, 1491 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1492 // we prefer to explicitly stack bang. 1493 // If not using T2 libthread, but using UseBoundThreads any threads 1494 // (primordial thread, jni_attachCurrentThread) we do not create, 1495 // probably are not bound, therefore they can not have an alternate 1496 // signal stack. Since our stack banging code is generated and 1497 // is shared across threads, all threads must be bound to allow 1498 // using alternate signal stacks. The alternative is to interpose 1499 // on _lwp_create to associate an alt sig stack with each LWP, 1500 // and this could be a problem when the JVM is embedded. 1501 // We would prefer to use alternate signal stacks with T2 1502 // Since there is currently no accurate way to detect T2 1503 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1504 // on installing alternate signal stacks 1505 1506 1507 // 05/09/03: removed alternate signal stack support for Solaris 1508 // The alternate signal stack mechanism is no longer needed to 1509 // handle stack overflow. This is now handled by allocating 1510 // guard pages (red zone) and stackbanging. 1511 // Initially the alternate signal stack mechanism was removed because 1512 // it did not work with T1 llibthread. Alternate 1513 // signal stacks MUST have all threads bound to lwps. Applications 1514 // can create their own threads and attach them without their being 1515 // bound under T1. This is frequently the case for the primordial thread. 1516 // If we were ever to reenable this mechanism we would need to 1517 // use the dynamic check for T2 libthread. 1518 1519 os::Solaris::init_thread_fpu_state(); 1520} 1521 1522 1523 1524// Free Solaris resources related to the OSThread 1525void os::free_thread(OSThread* osthread) { 1526 assert(osthread != NULL, "os::free_thread but osthread not set"); 1527 1528 1529 // We are told to free resources of the argument thread, 1530 // but we can only really operate on the current thread. 1531 // The main thread must take the VMThread down synchronously 1532 // before the main thread exits and frees up CodeHeap 1533 guarantee((Thread::current()->osthread() == osthread 1534 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1535 if (Thread::current()->osthread() == osthread) { 1536 // Restore caller's signal mask 1537 sigset_t sigmask = osthread->caller_sigmask(); 1538 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1539 } 1540 delete osthread; 1541} 1542 1543void os::pd_start_thread(Thread* thread) { 1544 int status = thr_continue(thread->osthread()->thread_id()); 1545 assert_status(status == 0, status, "thr_continue failed"); 1546} 1547 1548 1549intx os::current_thread_id() { 1550 return (intx)thr_self(); 1551} 1552 1553static pid_t _initial_pid = 0; 1554 1555int os::current_process_id() { 1556 return (int)(_initial_pid ? _initial_pid : getpid()); 1557} 1558 1559int os::allocate_thread_local_storage() { 1560 // %%% in Win32 this allocates a memory segment pointed to by a 1561 // register. Dan Stein can implement a similar feature in 1562 // Solaris. Alternatively, the VM can do the same thing 1563 // explicitly: malloc some storage and keep the pointer in a 1564 // register (which is part of the thread's context) (or keep it 1565 // in TLS). 1566 // %%% In current versions of Solaris, thr_self and TSD can 1567 // be accessed via short sequences of displaced indirections. 1568 // The value of thr_self is available as %g7(36). 1569 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1570 // assuming that the current thread already has a value bound to k. 1571 // It may be worth experimenting with such access patterns, 1572 // and later having the parameters formally exported from a Solaris 1573 // interface. I think, however, that it will be faster to 1574 // maintain the invariant that %g2 always contains the 1575 // JavaThread in Java code, and have stubs simply 1576 // treat %g2 as a caller-save register, preserving it in a %lN. 1577 thread_key_t tk; 1578 if (thr_keycreate( &tk, NULL ) ) 1579 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1580 return int(tk); 1581} 1582 1583void os::free_thread_local_storage(int index) { 1584 // %%% don't think we need anything here 1585 // if ( pthread_key_delete((pthread_key_t) tk) ) 1586 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1587} 1588 1589#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1590 // small number - point is NO swap space available 1591void os::thread_local_storage_at_put(int index, void* value) { 1592 // %%% this is used only in threadLocalStorage.cpp 1593 if (thr_setspecific((thread_key_t)index, value)) { 1594 if (errno == ENOMEM) { 1595 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1596 } else { 1597 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1598 } 1599 } else { 1600 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1601 } 1602} 1603 1604// This function could be called before TLS is initialized, for example, when 1605// VM receives an async signal or when VM causes a fatal error during 1606// initialization. Return NULL if thr_getspecific() fails. 1607void* os::thread_local_storage_at(int index) { 1608 // %%% this is used only in threadLocalStorage.cpp 1609 void* r = NULL; 1610 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1611} 1612 1613 1614const int NANOSECS_PER_MILLISECS = 1000000; 1615// gethrtime can move backwards if read from one cpu and then a different cpu 1616// getTimeNanos is guaranteed to not move backward on Solaris 1617// local spinloop created as faster for a CAS on an int than 1618// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1619// supported on sparc v8 or pre supports_cx8 intel boxes. 1620// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1621// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1622inline hrtime_t oldgetTimeNanos() { 1623 int gotlock = LOCK_INVALID; 1624 hrtime_t newtime = gethrtime(); 1625 1626 for (;;) { 1627// grab lock for max_hrtime 1628 int curlock = max_hrtime_lock; 1629 if (curlock & LOCK_BUSY) continue; 1630 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1631 if (newtime > max_hrtime) { 1632 max_hrtime = newtime; 1633 } else { 1634 newtime = max_hrtime; 1635 } 1636 // release lock 1637 max_hrtime_lock = LOCK_FREE; 1638 return newtime; 1639 } 1640} 1641// gethrtime can move backwards if read from one cpu and then a different cpu 1642// getTimeNanos is guaranteed to not move backward on Solaris 1643inline hrtime_t getTimeNanos() { 1644 if (VM_Version::supports_cx8()) { 1645 const hrtime_t now = gethrtime(); 1646 const hrtime_t prev = max_hrtime; 1647 if (now <= prev) return prev; // same or retrograde time; 1648 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1649 assert(obsv >= prev, "invariant"); // Monotonicity 1650 // If the CAS succeeded then we're done and return "now". 1651 // If the CAS failed and the observed value "obs" is >= now then 1652 // we should return "obs". If the CAS failed and now > obs > prv then 1653 // some other thread raced this thread and installed a new value, in which case 1654 // we could either (a) retry the entire operation, (b) retry trying to install now 1655 // or (c) just return obs. We use (c). No loop is required although in some cases 1656 // we might discard a higher "now" value in deference to a slightly lower but freshly 1657 // installed obs value. That's entirely benign -- it admits no new orderings compared 1658 // to (a) or (b) -- and greatly reduces coherence traffic. 1659 // We might also condition (c) on the magnitude of the delta between obs and now. 1660 // Avoiding excessive CAS operations to hot RW locations is critical. 1661 // See http://blogs.sun.com/dave/entry/cas_and_cache_trivia_invalidate 1662 return (prev == obsv) ? now : obsv ; 1663 } else { 1664 return oldgetTimeNanos(); 1665 } 1666} 1667 1668// Time since start-up in seconds to a fine granularity. 1669// Used by VMSelfDestructTimer and the MemProfiler. 1670double os::elapsedTime() { 1671 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1672} 1673 1674jlong os::elapsed_counter() { 1675 return (jlong)(getTimeNanos() - first_hrtime); 1676} 1677 1678jlong os::elapsed_frequency() { 1679 return hrtime_hz; 1680} 1681 1682// Return the real, user, and system times in seconds from an 1683// arbitrary fixed point in the past. 1684bool os::getTimesSecs(double* process_real_time, 1685 double* process_user_time, 1686 double* process_system_time) { 1687 struct tms ticks; 1688 clock_t real_ticks = times(&ticks); 1689 1690 if (real_ticks == (clock_t) (-1)) { 1691 return false; 1692 } else { 1693 double ticks_per_second = (double) clock_tics_per_sec; 1694 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1695 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1696 // For consistency return the real time from getTimeNanos() 1697 // converted to seconds. 1698 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1699 1700 return true; 1701 } 1702} 1703 1704bool os::supports_vtime() { return true; } 1705 1706bool os::enable_vtime() { 1707 int fd = open("/proc/self/ctl", O_WRONLY); 1708 if (fd == -1) 1709 return false; 1710 1711 long cmd[] = { PCSET, PR_MSACCT }; 1712 int res = write(fd, cmd, sizeof(long) * 2); 1713 close(fd); 1714 if (res != sizeof(long) * 2) 1715 return false; 1716 1717 return true; 1718} 1719 1720bool os::vtime_enabled() { 1721 int fd = open("/proc/self/status", O_RDONLY); 1722 if (fd == -1) 1723 return false; 1724 1725 pstatus_t status; 1726 int res = read(fd, (void*) &status, sizeof(pstatus_t)); 1727 close(fd); 1728 if (res != sizeof(pstatus_t)) 1729 return false; 1730 1731 return status.pr_flags & PR_MSACCT; 1732} 1733 1734double os::elapsedVTime() { 1735 return (double)gethrvtime() / (double)hrtime_hz; 1736} 1737 1738// Used internally for comparisons only 1739// getTimeMillis guaranteed to not move backwards on Solaris 1740jlong getTimeMillis() { 1741 jlong nanotime = getTimeNanos(); 1742 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1743} 1744 1745// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1746jlong os::javaTimeMillis() { 1747 timeval t; 1748 if (gettimeofday( &t, NULL) == -1) 1749 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1750 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1751} 1752 1753jlong os::javaTimeNanos() { 1754 return (jlong)getTimeNanos(); 1755} 1756 1757void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1758 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1759 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1760 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1761 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1762} 1763 1764char * os::local_time_string(char *buf, size_t buflen) { 1765 struct tm t; 1766 time_t long_time; 1767 time(&long_time); 1768 localtime_r(&long_time, &t); 1769 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1770 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1771 t.tm_hour, t.tm_min, t.tm_sec); 1772 return buf; 1773} 1774 1775// Note: os::shutdown() might be called very early during initialization, or 1776// called from signal handler. Before adding something to os::shutdown(), make 1777// sure it is async-safe and can handle partially initialized VM. 1778void os::shutdown() { 1779 1780 // allow PerfMemory to attempt cleanup of any persistent resources 1781 perfMemory_exit(); 1782 1783 // needs to remove object in file system 1784 AttachListener::abort(); 1785 1786 // flush buffered output, finish log files 1787 ostream_abort(); 1788 1789 // Check for abort hook 1790 abort_hook_t abort_hook = Arguments::abort_hook(); 1791 if (abort_hook != NULL) { 1792 abort_hook(); 1793 } 1794} 1795 1796// Note: os::abort() might be called very early during initialization, or 1797// called from signal handler. Before adding something to os::abort(), make 1798// sure it is async-safe and can handle partially initialized VM. 1799void os::abort(bool dump_core) { 1800 os::shutdown(); 1801 if (dump_core) { 1802#ifndef PRODUCT 1803 fdStream out(defaultStream::output_fd()); 1804 out.print_raw("Current thread is "); 1805 char buf[16]; 1806 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1807 out.print_raw_cr(buf); 1808 out.print_raw_cr("Dumping core ..."); 1809#endif 1810 ::abort(); // dump core (for debugging) 1811 } 1812 1813 ::exit(1); 1814} 1815 1816// Die immediately, no exit hook, no abort hook, no cleanup. 1817void os::die() { 1818 _exit(-1); 1819} 1820 1821// unused 1822void os::set_error_file(const char *logfile) {} 1823 1824// DLL functions 1825 1826const char* os::dll_file_extension() { return ".so"; } 1827 1828const char* os::get_temp_directory() { return "/tmp/"; } 1829 1830void os::dll_build_name( 1831 char* buffer, size_t buflen, const char* pname, const char* fname) { 1832 // copied from libhpi 1833 const size_t pnamelen = pname ? strlen(pname) : 0; 1834 1835 /* Quietly truncate on buffer overflow. Should be an error. */ 1836 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1837 *buffer = '\0'; 1838 return; 1839 } 1840 1841 if (pnamelen == 0) { 1842 sprintf(buffer, "lib%s.so", fname); 1843 } else { 1844 sprintf(buffer, "%s/lib%s.so", pname, fname); 1845 } 1846} 1847 1848const char* os::get_current_directory(char *buf, int buflen) { 1849 return getcwd(buf, buflen); 1850} 1851 1852// check if addr is inside libjvm[_g].so 1853bool os::address_is_in_vm(address addr) { 1854 static address libjvm_base_addr; 1855 Dl_info dlinfo; 1856 1857 if (libjvm_base_addr == NULL) { 1858 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1859 libjvm_base_addr = (address)dlinfo.dli_fbase; 1860 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1861 } 1862 1863 if (dladdr((void *)addr, &dlinfo)) { 1864 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1865 } 1866 1867 return false; 1868} 1869 1870typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1871static dladdr1_func_type dladdr1_func = NULL; 1872 1873bool os::dll_address_to_function_name(address addr, char *buf, 1874 int buflen, int * offset) { 1875 Dl_info dlinfo; 1876 1877 // dladdr1_func was initialized in os::init() 1878 if (dladdr1_func){ 1879 // yes, we have dladdr1 1880 1881 // Support for dladdr1 is checked at runtime; it may be 1882 // available even if the vm is built on a machine that does 1883 // not have dladdr1 support. Make sure there is a value for 1884 // RTLD_DL_SYMENT. 1885 #ifndef RTLD_DL_SYMENT 1886 #define RTLD_DL_SYMENT 1 1887 #endif 1888 Sym * info; 1889 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1890 RTLD_DL_SYMENT)) { 1891 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1892 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1893 1894 // check if the returned symbol really covers addr 1895 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1896 } else { 1897 if (buf) buf[0] = '\0'; 1898 if (offset) *offset = -1; 1899 return false; 1900 } 1901 } else { 1902 // no, only dladdr is available 1903 if(dladdr((void *)addr, &dlinfo)) { 1904 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1905 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1906 return true; 1907 } else { 1908 if (buf) buf[0] = '\0'; 1909 if (offset) *offset = -1; 1910 return false; 1911 } 1912 } 1913} 1914 1915bool os::dll_address_to_library_name(address addr, char* buf, 1916 int buflen, int* offset) { 1917 Dl_info dlinfo; 1918 1919 if (dladdr((void*)addr, &dlinfo)){ 1920 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1921 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1922 return true; 1923 } else { 1924 if (buf) buf[0] = '\0'; 1925 if (offset) *offset = -1; 1926 return false; 1927 } 1928} 1929 1930// Prints the names and full paths of all opened dynamic libraries 1931// for current process 1932void os::print_dll_info(outputStream * st) { 1933 Dl_info dli; 1934 void *handle; 1935 Link_map *map; 1936 Link_map *p; 1937 1938 st->print_cr("Dynamic libraries:"); st->flush(); 1939 1940 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1941 st->print_cr("Error: Cannot print dynamic libraries."); 1942 return; 1943 } 1944 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1945 if (handle == NULL) { 1946 st->print_cr("Error: Cannot print dynamic libraries."); 1947 return; 1948 } 1949 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1950 if (map == NULL) { 1951 st->print_cr("Error: Cannot print dynamic libraries."); 1952 return; 1953 } 1954 1955 while (map->l_prev != NULL) 1956 map = map->l_prev; 1957 1958 while (map != NULL) { 1959 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1960 map = map->l_next; 1961 } 1962 1963 dlclose(handle); 1964} 1965 1966 // Loads .dll/.so and 1967 // in case of error it checks if .dll/.so was built for the 1968 // same architecture as Hotspot is running on 1969 1970void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1971{ 1972 void * result= ::dlopen(filename, RTLD_LAZY); 1973 if (result != NULL) { 1974 // Successful loading 1975 return result; 1976 } 1977 1978 Elf32_Ehdr elf_head; 1979 1980 // Read system error message into ebuf 1981 // It may or may not be overwritten below 1982 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1983 ebuf[ebuflen-1]='\0'; 1984 int diag_msg_max_length=ebuflen-strlen(ebuf); 1985 char* diag_msg_buf=ebuf+strlen(ebuf); 1986 1987 if (diag_msg_max_length==0) { 1988 // No more space in ebuf for additional diagnostics message 1989 return NULL; 1990 } 1991 1992 1993 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1994 1995 if (file_descriptor < 0) { 1996 // Can't open library, report dlerror() message 1997 return NULL; 1998 } 1999 2000 bool failed_to_read_elf_head= 2001 (sizeof(elf_head)!= 2002 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 2003 2004 ::close(file_descriptor); 2005 if (failed_to_read_elf_head) { 2006 // file i/o error - report dlerror() msg 2007 return NULL; 2008 } 2009 2010 typedef struct { 2011 Elf32_Half code; // Actual value as defined in elf.h 2012 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2013 char elf_class; // 32 or 64 bit 2014 char endianess; // MSB or LSB 2015 char* name; // String representation 2016 } arch_t; 2017 2018 static const arch_t arch_array[]={ 2019 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2020 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2021 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2022 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2023 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2024 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2025 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2026 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2027 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 2028 }; 2029 2030 #if (defined IA32) 2031 static Elf32_Half running_arch_code=EM_386; 2032 #elif (defined AMD64) 2033 static Elf32_Half running_arch_code=EM_X86_64; 2034 #elif (defined IA64) 2035 static Elf32_Half running_arch_code=EM_IA_64; 2036 #elif (defined __sparc) && (defined _LP64) 2037 static Elf32_Half running_arch_code=EM_SPARCV9; 2038 #elif (defined __sparc) && (!defined _LP64) 2039 static Elf32_Half running_arch_code=EM_SPARC; 2040 #elif (defined __powerpc64__) 2041 static Elf32_Half running_arch_code=EM_PPC64; 2042 #elif (defined __powerpc__) 2043 static Elf32_Half running_arch_code=EM_PPC; 2044 #else 2045 #error Method os::dll_load requires that one of following is defined:\ 2046 IA32, AMD64, IA64, __sparc, __powerpc__ 2047 #endif 2048 2049 // Identify compatability class for VM's architecture and library's architecture 2050 // Obtain string descriptions for architectures 2051 2052 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2053 int running_arch_index=-1; 2054 2055 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2056 if (running_arch_code == arch_array[i].code) { 2057 running_arch_index = i; 2058 } 2059 if (lib_arch.code == arch_array[i].code) { 2060 lib_arch.compat_class = arch_array[i].compat_class; 2061 lib_arch.name = arch_array[i].name; 2062 } 2063 } 2064 2065 assert(running_arch_index != -1, 2066 "Didn't find running architecture code (running_arch_code) in arch_array"); 2067 if (running_arch_index == -1) { 2068 // Even though running architecture detection failed 2069 // we may still continue with reporting dlerror() message 2070 return NULL; 2071 } 2072 2073 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2074 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2075 return NULL; 2076 } 2077 2078 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2079 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2080 return NULL; 2081 } 2082 2083 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2084 if ( lib_arch.name!=NULL ) { 2085 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2086 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2087 lib_arch.name, arch_array[running_arch_index].name); 2088 } else { 2089 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2090 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2091 lib_arch.code, 2092 arch_array[running_arch_index].name); 2093 } 2094 } 2095 2096 return NULL; 2097} 2098 2099void* os::dll_lookup(void* handle, const char* name) { 2100 return dlsym(handle, name); 2101} 2102 2103 2104bool _print_ascii_file(const char* filename, outputStream* st) { 2105 int fd = open(filename, O_RDONLY); 2106 if (fd == -1) { 2107 return false; 2108 } 2109 2110 char buf[32]; 2111 int bytes; 2112 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2113 st->print_raw(buf, bytes); 2114 } 2115 2116 close(fd); 2117 2118 return true; 2119} 2120 2121void os::print_os_info(outputStream* st) { 2122 st->print("OS:"); 2123 2124 if (!_print_ascii_file("/etc/release", st)) { 2125 st->print("Solaris"); 2126 } 2127 st->cr(); 2128 2129 // kernel 2130 st->print("uname:"); 2131 struct utsname name; 2132 uname(&name); 2133 st->print(name.sysname); st->print(" "); 2134 st->print(name.release); st->print(" "); 2135 st->print(name.version); st->print(" "); 2136 st->print(name.machine); 2137 2138 // libthread 2139 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2140 else st->print(" (T1 libthread)"); 2141 st->cr(); 2142 2143 // rlimit 2144 st->print("rlimit:"); 2145 struct rlimit rlim; 2146 2147 st->print(" STACK "); 2148 getrlimit(RLIMIT_STACK, &rlim); 2149 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2150 else st->print("%uk", rlim.rlim_cur >> 10); 2151 2152 st->print(", CORE "); 2153 getrlimit(RLIMIT_CORE, &rlim); 2154 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2155 else st->print("%uk", rlim.rlim_cur >> 10); 2156 2157 st->print(", NOFILE "); 2158 getrlimit(RLIMIT_NOFILE, &rlim); 2159 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2160 else st->print("%d", rlim.rlim_cur); 2161 2162 st->print(", AS "); 2163 getrlimit(RLIMIT_AS, &rlim); 2164 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2165 else st->print("%uk", rlim.rlim_cur >> 10); 2166 st->cr(); 2167 2168 // load average 2169 st->print("load average:"); 2170 double loadavg[3]; 2171 os::loadavg(loadavg, 3); 2172 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2173 st->cr(); 2174} 2175 2176 2177static bool check_addr0(outputStream* st) { 2178 jboolean status = false; 2179 int fd = open("/proc/self/map",O_RDONLY); 2180 if (fd >= 0) { 2181 prmap_t p; 2182 while(read(fd, &p, sizeof(p)) > 0) { 2183 if (p.pr_vaddr == 0x0) { 2184 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2185 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2186 st->print("Access:"); 2187 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2188 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2189 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2190 st->cr(); 2191 status = true; 2192 } 2193 close(fd); 2194 } 2195 } 2196 return status; 2197} 2198 2199void os::print_memory_info(outputStream* st) { 2200 st->print("Memory:"); 2201 st->print(" %dk page", os::vm_page_size()>>10); 2202 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2203 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2204 st->cr(); 2205 (void) check_addr0(st); 2206} 2207 2208// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2209// but they're the same for all the solaris architectures that we support. 2210const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2211 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2212 "ILL_COPROC", "ILL_BADSTK" }; 2213 2214const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2215 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2216 "FPE_FLTINV", "FPE_FLTSUB" }; 2217 2218const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2219 2220const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2221 2222void os::print_siginfo(outputStream* st, void* siginfo) { 2223 st->print("siginfo:"); 2224 2225 const int buflen = 100; 2226 char buf[buflen]; 2227 siginfo_t *si = (siginfo_t*)siginfo; 2228 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2229 char *err = strerror(si->si_errno); 2230 if (si->si_errno != 0 && err != NULL) { 2231 st->print("si_errno=%s", err); 2232 } else { 2233 st->print("si_errno=%d", si->si_errno); 2234 } 2235 const int c = si->si_code; 2236 assert(c > 0, "unexpected si_code"); 2237 switch (si->si_signo) { 2238 case SIGILL: 2239 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2240 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2241 break; 2242 case SIGFPE: 2243 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2244 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2245 break; 2246 case SIGSEGV: 2247 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2248 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2249 break; 2250 case SIGBUS: 2251 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2252 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2253 break; 2254 default: 2255 st->print(", si_code=%d", si->si_code); 2256 // no si_addr 2257 } 2258 2259 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2260 UseSharedSpaces) { 2261 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2262 if (mapinfo->is_in_shared_space(si->si_addr)) { 2263 st->print("\n\nError accessing class data sharing archive." \ 2264 " Mapped file inaccessible during execution, " \ 2265 " possible disk/network problem."); 2266 } 2267 } 2268 st->cr(); 2269} 2270 2271// Moved from whole group, because we need them here for diagnostic 2272// prints. 2273#define OLDMAXSIGNUM 32 2274static int Maxsignum = 0; 2275static int *ourSigFlags = NULL; 2276 2277extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2278 2279int os::Solaris::get_our_sigflags(int sig) { 2280 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2281 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2282 return ourSigFlags[sig]; 2283} 2284 2285void os::Solaris::set_our_sigflags(int sig, int flags) { 2286 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2287 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2288 ourSigFlags[sig] = flags; 2289} 2290 2291 2292static const char* get_signal_handler_name(address handler, 2293 char* buf, int buflen) { 2294 int offset; 2295 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2296 if (found) { 2297 // skip directory names 2298 const char *p1, *p2; 2299 p1 = buf; 2300 size_t len = strlen(os::file_separator()); 2301 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2302 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2303 } else { 2304 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2305 } 2306 return buf; 2307} 2308 2309static void print_signal_handler(outputStream* st, int sig, 2310 char* buf, size_t buflen) { 2311 struct sigaction sa; 2312 2313 sigaction(sig, NULL, &sa); 2314 2315 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2316 2317 address handler = (sa.sa_flags & SA_SIGINFO) 2318 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2319 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2320 2321 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2322 st->print("SIG_DFL"); 2323 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2324 st->print("SIG_IGN"); 2325 } else { 2326 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2327 } 2328 2329 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2330 2331 address rh = VMError::get_resetted_sighandler(sig); 2332 // May be, handler was resetted by VMError? 2333 if(rh != NULL) { 2334 handler = rh; 2335 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2336 } 2337 2338 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2339 2340 // Check: is it our handler? 2341 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2342 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2343 // It is our signal handler 2344 // check for flags 2345 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2346 st->print( 2347 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2348 os::Solaris::get_our_sigflags(sig)); 2349 } 2350 } 2351 st->cr(); 2352} 2353 2354void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2355 st->print_cr("Signal Handlers:"); 2356 print_signal_handler(st, SIGSEGV, buf, buflen); 2357 print_signal_handler(st, SIGBUS , buf, buflen); 2358 print_signal_handler(st, SIGFPE , buf, buflen); 2359 print_signal_handler(st, SIGPIPE, buf, buflen); 2360 print_signal_handler(st, SIGXFSZ, buf, buflen); 2361 print_signal_handler(st, SIGILL , buf, buflen); 2362 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2363 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2364 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2365 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2366 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2367 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2368 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2369 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2370} 2371 2372static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2373 2374// Find the full path to the current module, libjvm.so or libjvm_g.so 2375void os::jvm_path(char *buf, jint buflen) { 2376 // Error checking. 2377 if (buflen < MAXPATHLEN) { 2378 assert(false, "must use a large-enough buffer"); 2379 buf[0] = '\0'; 2380 return; 2381 } 2382 // Lazy resolve the path to current module. 2383 if (saved_jvm_path[0] != 0) { 2384 strcpy(buf, saved_jvm_path); 2385 return; 2386 } 2387 2388 Dl_info dlinfo; 2389 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2390 assert(ret != 0, "cannot locate libjvm"); 2391 realpath((char *)dlinfo.dli_fname, buf); 2392 2393 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2394 // Support for the gamma launcher. Typical value for buf is 2395 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2396 // the right place in the string, then assume we are installed in a JDK and 2397 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2398 // up the path so it looks like libjvm.so is installed there (append a 2399 // fake suffix hotspot/libjvm.so). 2400 const char *p = buf + strlen(buf) - 1; 2401 for (int count = 0; p > buf && count < 5; ++count) { 2402 for (--p; p > buf && *p != '/'; --p) 2403 /* empty */ ; 2404 } 2405 2406 if (strncmp(p, "/jre/lib/", 9) != 0) { 2407 // Look for JAVA_HOME in the environment. 2408 char* java_home_var = ::getenv("JAVA_HOME"); 2409 if (java_home_var != NULL && java_home_var[0] != 0) { 2410 char cpu_arch[12]; 2411 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2412#ifdef _LP64 2413 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2414 if (strcmp(cpu_arch, "sparc") == 0) { 2415 strcat(cpu_arch, "v9"); 2416 } else if (strcmp(cpu_arch, "i386") == 0) { 2417 strcpy(cpu_arch, "amd64"); 2418 } 2419#endif 2420 // Check the current module name "libjvm.so" or "libjvm_g.so". 2421 p = strrchr(buf, '/'); 2422 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2423 p = strstr(p, "_g") ? "_g" : ""; 2424 2425 realpath(java_home_var, buf); 2426 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2427 if (0 == access(buf, F_OK)) { 2428 // Use current module name "libjvm[_g].so" instead of 2429 // "libjvm"debug_only("_g")".so" since for fastdebug version 2430 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2431 // It is used when we are choosing the HPI library's name 2432 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2433 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2434 } else { 2435 // Go back to path of .so 2436 realpath((char *)dlinfo.dli_fname, buf); 2437 } 2438 } 2439 } 2440 } 2441 2442 strcpy(saved_jvm_path, buf); 2443} 2444 2445 2446void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2447 // no prefix required, not even "_" 2448} 2449 2450 2451void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2452 // no suffix required 2453} 2454 2455 2456// sun.misc.Signal 2457 2458extern "C" { 2459 static void UserHandler(int sig, void *siginfo, void *context) { 2460 // Ctrl-C is pressed during error reporting, likely because the error 2461 // handler fails to abort. Let VM die immediately. 2462 if (sig == SIGINT && is_error_reported()) { 2463 os::die(); 2464 } 2465 2466 os::signal_notify(sig); 2467 // We do not need to reinstate the signal handler each time... 2468 } 2469} 2470 2471void* os::user_handler() { 2472 return CAST_FROM_FN_PTR(void*, UserHandler); 2473} 2474 2475extern "C" { 2476 typedef void (*sa_handler_t)(int); 2477 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2478} 2479 2480void* os::signal(int signal_number, void* handler) { 2481 struct sigaction sigAct, oldSigAct; 2482 sigfillset(&(sigAct.sa_mask)); 2483 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2484 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2485 2486 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2487 // -1 means registration failed 2488 return (void *)-1; 2489 2490 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2491} 2492 2493void os::signal_raise(int signal_number) { 2494 raise(signal_number); 2495} 2496 2497/* 2498 * The following code is moved from os.cpp for making this 2499 * code platform specific, which it is by its very nature. 2500 */ 2501 2502// a counter for each possible signal value 2503static int Sigexit = 0; 2504static int Maxlibjsigsigs; 2505static jint *pending_signals = NULL; 2506static int *preinstalled_sigs = NULL; 2507static struct sigaction *chainedsigactions = NULL; 2508static sema_t sig_sem; 2509typedef int (*version_getting_t)(); 2510version_getting_t os::Solaris::get_libjsig_version = NULL; 2511static int libjsigversion = NULL; 2512 2513int os::sigexitnum_pd() { 2514 assert(Sigexit > 0, "signal memory not yet initialized"); 2515 return Sigexit; 2516} 2517 2518void os::Solaris::init_signal_mem() { 2519 // Initialize signal structures 2520 Maxsignum = SIGRTMAX; 2521 Sigexit = Maxsignum+1; 2522 assert(Maxsignum >0, "Unable to obtain max signal number"); 2523 2524 Maxlibjsigsigs = Maxsignum; 2525 2526 // pending_signals has one int per signal 2527 // The additional signal is for SIGEXIT - exit signal to signal_thread 2528 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2529 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2530 2531 if (UseSignalChaining) { 2532 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2533 * (Maxsignum + 1)); 2534 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2535 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2536 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2537 } 2538 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2539 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2540} 2541 2542void os::signal_init_pd() { 2543 int ret; 2544 2545 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2546 assert(ret == 0, "sema_init() failed"); 2547} 2548 2549void os::signal_notify(int signal_number) { 2550 int ret; 2551 2552 Atomic::inc(&pending_signals[signal_number]); 2553 ret = ::sema_post(&sig_sem); 2554 assert(ret == 0, "sema_post() failed"); 2555} 2556 2557static int check_pending_signals(bool wait_for_signal) { 2558 int ret; 2559 while (true) { 2560 for (int i = 0; i < Sigexit + 1; i++) { 2561 jint n = pending_signals[i]; 2562 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2563 return i; 2564 } 2565 } 2566 if (!wait_for_signal) { 2567 return -1; 2568 } 2569 JavaThread *thread = JavaThread::current(); 2570 ThreadBlockInVM tbivm(thread); 2571 2572 bool threadIsSuspended; 2573 do { 2574 thread->set_suspend_equivalent(); 2575 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2576 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2577 ; 2578 assert(ret == 0, "sema_wait() failed"); 2579 2580 // were we externally suspended while we were waiting? 2581 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2582 if (threadIsSuspended) { 2583 // 2584 // The semaphore has been incremented, but while we were waiting 2585 // another thread suspended us. We don't want to continue running 2586 // while suspended because that would surprise the thread that 2587 // suspended us. 2588 // 2589 ret = ::sema_post(&sig_sem); 2590 assert(ret == 0, "sema_post() failed"); 2591 2592 thread->java_suspend_self(); 2593 } 2594 } while (threadIsSuspended); 2595 } 2596} 2597 2598int os::signal_lookup() { 2599 return check_pending_signals(false); 2600} 2601 2602int os::signal_wait() { 2603 return check_pending_signals(true); 2604} 2605 2606//////////////////////////////////////////////////////////////////////////////// 2607// Virtual Memory 2608 2609static int page_size = -1; 2610 2611// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2612// clear this var if support is not available. 2613static bool has_map_align = true; 2614 2615int os::vm_page_size() { 2616 assert(page_size != -1, "must call os::init"); 2617 return page_size; 2618} 2619 2620// Solaris allocates memory by pages. 2621int os::vm_allocation_granularity() { 2622 assert(page_size != -1, "must call os::init"); 2623 return page_size; 2624} 2625 2626bool os::commit_memory(char* addr, size_t bytes) { 2627 size_t size = bytes; 2628 return 2629 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2630 PROT_READ | PROT_WRITE | PROT_EXEC); 2631} 2632 2633bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2634 if (commit_memory(addr, bytes)) { 2635 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2636 // If the large page size has been set and the VM 2637 // is using large pages, use the large page size 2638 // if it is smaller than the alignment hint. This is 2639 // a case where the VM wants to use a larger alignment size 2640 // for its own reasons but still want to use large pages 2641 // (which is what matters to setting the mpss range. 2642 size_t page_size = 0; 2643 if (large_page_size() < alignment_hint) { 2644 assert(UseLargePages, "Expected to be here for large page use only"); 2645 page_size = large_page_size(); 2646 } else { 2647 // If the alignment hint is less than the large page 2648 // size, the VM wants a particular alignment (thus the hint) 2649 // for internal reasons. Try to set the mpss range using 2650 // the alignment_hint. 2651 page_size = alignment_hint; 2652 } 2653 // Since this is a hint, ignore any failures. 2654 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2655 } 2656 return true; 2657 } 2658 return false; 2659} 2660 2661// Uncommit the pages in a specified region. 2662void os::free_memory(char* addr, size_t bytes) { 2663 if (madvise(addr, bytes, MADV_FREE) < 0) { 2664 debug_only(warning("MADV_FREE failed.")); 2665 return; 2666 } 2667} 2668 2669// Change the page size in a given range. 2670void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2671 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2672 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2673 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2674} 2675 2676// Tell the OS to make the range local to the first-touching LWP 2677void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2678 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2679 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2680 debug_only(warning("MADV_ACCESS_LWP failed.")); 2681 } 2682} 2683 2684// Tell the OS that this range would be accessed from different LWPs. 2685void os::numa_make_global(char *addr, size_t bytes) { 2686 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2687 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2688 debug_only(warning("MADV_ACCESS_MANY failed.")); 2689 } 2690} 2691 2692// Get the number of the locality groups. 2693size_t os::numa_get_groups_num() { 2694 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2695 return n != -1 ? n : 1; 2696} 2697 2698// Get a list of leaf locality groups. A leaf lgroup is group that 2699// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2700// board. An LWP is assigned to one of these groups upon creation. 2701size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2702 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2703 ids[0] = 0; 2704 return 1; 2705 } 2706 int result_size = 0, top = 1, bottom = 0, cur = 0; 2707 for (int k = 0; k < size; k++) { 2708 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2709 (Solaris::lgrp_id_t*)&ids[top], size - top); 2710 if (r == -1) { 2711 ids[0] = 0; 2712 return 1; 2713 } 2714 if (!r) { 2715 // That's a leaf node. 2716 assert (bottom <= cur, "Sanity check"); 2717 // Check if the node has memory 2718 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2719 NULL, 0, LGRP_RSRC_MEM) > 0) { 2720 ids[bottom++] = ids[cur]; 2721 } 2722 } 2723 top += r; 2724 cur++; 2725 } 2726 if (bottom == 0) { 2727 // Handle a situation, when the OS reports no memory available. 2728 // Assume UMA architecture. 2729 ids[0] = 0; 2730 return 1; 2731 } 2732 return bottom; 2733} 2734 2735// Detect the topology change. Typically happens during CPU plugging-unplugging. 2736bool os::numa_topology_changed() { 2737 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2738 if (is_stale != -1 && is_stale) { 2739 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2740 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2741 assert(c != 0, "Failure to initialize LGRP API"); 2742 Solaris::set_lgrp_cookie(c); 2743 return true; 2744 } 2745 return false; 2746} 2747 2748// Get the group id of the current LWP. 2749int os::numa_get_group_id() { 2750 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2751 if (lgrp_id == -1) { 2752 return 0; 2753 } 2754 const int size = os::numa_get_groups_num(); 2755 int *ids = (int*)alloca(size * sizeof(int)); 2756 2757 // Get the ids of all lgroups with memory; r is the count. 2758 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2759 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2760 if (r <= 0) { 2761 return 0; 2762 } 2763 return ids[os::random() % r]; 2764} 2765 2766// Request information about the page. 2767bool os::get_page_info(char *start, page_info* info) { 2768 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2769 uint64_t addr = (uintptr_t)start; 2770 uint64_t outdata[2]; 2771 uint_t validity = 0; 2772 2773 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2774 return false; 2775 } 2776 2777 info->size = 0; 2778 info->lgrp_id = -1; 2779 2780 if ((validity & 1) != 0) { 2781 if ((validity & 2) != 0) { 2782 info->lgrp_id = outdata[0]; 2783 } 2784 if ((validity & 4) != 0) { 2785 info->size = outdata[1]; 2786 } 2787 return true; 2788 } 2789 return false; 2790} 2791 2792// Scan the pages from start to end until a page different than 2793// the one described in the info parameter is encountered. 2794char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2795 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2796 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2797 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2798 uint_t validity[MAX_MEMINFO_CNT]; 2799 2800 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2801 uint64_t p = (uint64_t)start; 2802 while (p < (uint64_t)end) { 2803 addrs[0] = p; 2804 size_t addrs_count = 1; 2805 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2806 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2807 addrs_count++; 2808 } 2809 2810 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2811 return NULL; 2812 } 2813 2814 size_t i = 0; 2815 for (; i < addrs_count; i++) { 2816 if ((validity[i] & 1) != 0) { 2817 if ((validity[i] & 4) != 0) { 2818 if (outdata[types * i + 1] != page_expected->size) { 2819 break; 2820 } 2821 } else 2822 if (page_expected->size != 0) { 2823 break; 2824 } 2825 2826 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2827 if (outdata[types * i] != page_expected->lgrp_id) { 2828 break; 2829 } 2830 } 2831 } else { 2832 return NULL; 2833 } 2834 } 2835 2836 if (i != addrs_count) { 2837 if ((validity[i] & 2) != 0) { 2838 page_found->lgrp_id = outdata[types * i]; 2839 } else { 2840 page_found->lgrp_id = -1; 2841 } 2842 if ((validity[i] & 4) != 0) { 2843 page_found->size = outdata[types * i + 1]; 2844 } else { 2845 page_found->size = 0; 2846 } 2847 return (char*)addrs[i]; 2848 } 2849 2850 p = addrs[addrs_count - 1] + page_size; 2851 } 2852 return end; 2853} 2854 2855bool os::uncommit_memory(char* addr, size_t bytes) { 2856 size_t size = bytes; 2857 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2858 // uncommitted page. Otherwise, the read/write might succeed if we 2859 // have enough swap space to back the physical page. 2860 return 2861 NULL != Solaris::mmap_chunk(addr, size, 2862 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2863 PROT_NONE); 2864} 2865 2866char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2867 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2868 2869 if (b == MAP_FAILED) { 2870 return NULL; 2871 } 2872 return b; 2873} 2874 2875char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2876 char* addr = requested_addr; 2877 int flags = MAP_PRIVATE | MAP_NORESERVE; 2878 2879 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2880 2881 if (fixed) { 2882 flags |= MAP_FIXED; 2883 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2884 flags |= MAP_ALIGN; 2885 addr = (char*) alignment_hint; 2886 } 2887 2888 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2889 // uncommitted page. Otherwise, the read/write might succeed if we 2890 // have enough swap space to back the physical page. 2891 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2892} 2893 2894char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2895 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2896 2897 guarantee(requested_addr == NULL || requested_addr == addr, 2898 "OS failed to return requested mmap address."); 2899 return addr; 2900} 2901 2902// Reserve memory at an arbitrary address, only if that area is 2903// available (and not reserved for something else). 2904 2905char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2906 const int max_tries = 10; 2907 char* base[max_tries]; 2908 size_t size[max_tries]; 2909 2910 // Solaris adds a gap between mmap'ed regions. The size of the gap 2911 // is dependent on the requested size and the MMU. Our initial gap 2912 // value here is just a guess and will be corrected later. 2913 bool had_top_overlap = false; 2914 bool have_adjusted_gap = false; 2915 size_t gap = 0x400000; 2916 2917 // Assert only that the size is a multiple of the page size, since 2918 // that's all that mmap requires, and since that's all we really know 2919 // about at this low abstraction level. If we need higher alignment, 2920 // we can either pass an alignment to this method or verify alignment 2921 // in one of the methods further up the call chain. See bug 5044738. 2922 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2923 2924 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2925 // Give it a try, if the kernel honors the hint we can return immediately. 2926 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2927 volatile int err = errno; 2928 if (addr == requested_addr) { 2929 return addr; 2930 } else if (addr != NULL) { 2931 unmap_memory(addr, bytes); 2932 } 2933 2934 if (PrintMiscellaneous && Verbose) { 2935 char buf[256]; 2936 buf[0] = '\0'; 2937 if (addr == NULL) { 2938 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2939 } 2940 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2941 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2942 "%s", bytes, requested_addr, addr, buf); 2943 } 2944 2945 // Address hint method didn't work. Fall back to the old method. 2946 // In theory, once SNV becomes our oldest supported platform, this 2947 // code will no longer be needed. 2948 // 2949 // Repeatedly allocate blocks until the block is allocated at the 2950 // right spot. Give up after max_tries. 2951 int i; 2952 for (i = 0; i < max_tries; ++i) { 2953 base[i] = reserve_memory(bytes); 2954 2955 if (base[i] != NULL) { 2956 // Is this the block we wanted? 2957 if (base[i] == requested_addr) { 2958 size[i] = bytes; 2959 break; 2960 } 2961 2962 // check that the gap value is right 2963 if (had_top_overlap && !have_adjusted_gap) { 2964 size_t actual_gap = base[i-1] - base[i] - bytes; 2965 if (gap != actual_gap) { 2966 // adjust the gap value and retry the last 2 allocations 2967 assert(i > 0, "gap adjustment code problem"); 2968 have_adjusted_gap = true; // adjust the gap only once, just in case 2969 gap = actual_gap; 2970 if (PrintMiscellaneous && Verbose) { 2971 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2972 } 2973 unmap_memory(base[i], bytes); 2974 unmap_memory(base[i-1], size[i-1]); 2975 i-=2; 2976 continue; 2977 } 2978 } 2979 2980 // Does this overlap the block we wanted? Give back the overlapped 2981 // parts and try again. 2982 // 2983 // There is still a bug in this code: if top_overlap == bytes, 2984 // the overlap is offset from requested region by the value of gap. 2985 // In this case giving back the overlapped part will not work, 2986 // because we'll give back the entire block at base[i] and 2987 // therefore the subsequent allocation will not generate a new gap. 2988 // This could be fixed with a new algorithm that used larger 2989 // or variable size chunks to find the requested region - 2990 // but such a change would introduce additional complications. 2991 // It's rare enough that the planets align for this bug, 2992 // so we'll just wait for a fix for 6204603/5003415 which 2993 // will provide a mmap flag to allow us to avoid this business. 2994 2995 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2996 if (top_overlap >= 0 && top_overlap < bytes) { 2997 had_top_overlap = true; 2998 unmap_memory(base[i], top_overlap); 2999 base[i] += top_overlap; 3000 size[i] = bytes - top_overlap; 3001 } else { 3002 size_t bottom_overlap = base[i] + bytes - requested_addr; 3003 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 3004 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 3005 warning("attempt_reserve_memory_at: possible alignment bug"); 3006 } 3007 unmap_memory(requested_addr, bottom_overlap); 3008 size[i] = bytes - bottom_overlap; 3009 } else { 3010 size[i] = bytes; 3011 } 3012 } 3013 } 3014 } 3015 3016 // Give back the unused reserved pieces. 3017 3018 for (int j = 0; j < i; ++j) { 3019 if (base[j] != NULL) { 3020 unmap_memory(base[j], size[j]); 3021 } 3022 } 3023 3024 return (i < max_tries) ? requested_addr : NULL; 3025} 3026 3027bool os::release_memory(char* addr, size_t bytes) { 3028 size_t size = bytes; 3029 return munmap(addr, size) == 0; 3030} 3031 3032static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3033 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3034 "addr must be page aligned"); 3035 int retVal = mprotect(addr, bytes, prot); 3036 return retVal == 0; 3037} 3038 3039// Protect memory (Used to pass readonly pages through 3040// JNI GetArray<type>Elements with empty arrays.) 3041// Also, used for serialization page and for compressed oops null pointer 3042// checking. 3043bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3044 bool is_committed) { 3045 unsigned int p = 0; 3046 switch (prot) { 3047 case MEM_PROT_NONE: p = PROT_NONE; break; 3048 case MEM_PROT_READ: p = PROT_READ; break; 3049 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3050 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3051 default: 3052 ShouldNotReachHere(); 3053 } 3054 // is_committed is unused. 3055 return solaris_mprotect(addr, bytes, p); 3056} 3057 3058// guard_memory and unguard_memory only happens within stack guard pages. 3059// Since ISM pertains only to the heap, guard and unguard memory should not 3060/// happen with an ISM region. 3061bool os::guard_memory(char* addr, size_t bytes) { 3062 return solaris_mprotect(addr, bytes, PROT_NONE); 3063} 3064 3065bool os::unguard_memory(char* addr, size_t bytes) { 3066 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3067} 3068 3069// Large page support 3070 3071// UseLargePages is the master flag to enable/disable large page memory. 3072// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3073// effects can be described in the following table: 3074// 3075// UseLargePages UseMPSS UseISM 3076// false * * => UseLargePages is the master switch, turning 3077// it off will turn off both UseMPSS and 3078// UseISM. VM will not use large page memory 3079// regardless the settings of UseMPSS/UseISM. 3080// true false false => Unless future Solaris provides other 3081// mechanism to use large page memory, this 3082// combination is equivalent to -UseLargePages, 3083// VM will not use large page memory 3084// true true false => JVM will use MPSS for large page memory. 3085// This is the default behavior. 3086// true false true => JVM will use ISM for large page memory. 3087// true true true => JVM will use ISM if it is available. 3088// Otherwise, JVM will fall back to MPSS. 3089// Becaues ISM is now available on all 3090// supported Solaris versions, this combination 3091// is equivalent to +UseISM -UseMPSS. 3092 3093typedef int (*getpagesizes_func_type) (size_t[], int); 3094static size_t _large_page_size = 0; 3095 3096bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3097 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3098 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3099 // can support multiple page sizes. 3100 3101 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3102 // ISM is only recommended on old Solaris where there is no MPSS support. 3103 // Simply choose a conservative value as default. 3104 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3105 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3106 3107 // ISM is available on all supported Solaris versions 3108 return true; 3109} 3110 3111// Insertion sort for small arrays (descending order). 3112static void insertion_sort_descending(size_t* array, int len) { 3113 for (int i = 0; i < len; i++) { 3114 size_t val = array[i]; 3115 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3116 size_t tmp = array[key]; 3117 array[key] = array[key - 1]; 3118 array[key - 1] = tmp; 3119 } 3120 } 3121} 3122 3123bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3124 getpagesizes_func_type getpagesizes_func = 3125 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3126 if (getpagesizes_func == NULL) { 3127 if (warn) { 3128 warning("MPSS is not supported by the operating system."); 3129 } 3130 return false; 3131 } 3132 3133 const unsigned int usable_count = VM_Version::page_size_count(); 3134 if (usable_count == 1) { 3135 return false; 3136 } 3137 3138 // Fill the array of page sizes. 3139 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3140 assert(n > 0, "Solaris bug?"); 3141 if (n == page_sizes_max) { 3142 // Add a sentinel value (necessary only if the array was completely filled 3143 // since it is static (zeroed at initialization)). 3144 _page_sizes[--n] = 0; 3145 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3146 } 3147 assert(_page_sizes[n] == 0, "missing sentinel"); 3148 3149 if (n == 1) return false; // Only one page size available. 3150 3151 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3152 // select up to usable_count elements. First sort the array, find the first 3153 // acceptable value, then copy the usable sizes to the top of the array and 3154 // trim the rest. Make sure to include the default page size :-). 3155 // 3156 // A better policy could get rid of the 4M limit by taking the sizes of the 3157 // important VM memory regions (java heap and possibly the code cache) into 3158 // account. 3159 insertion_sort_descending(_page_sizes, n); 3160 const size_t size_limit = 3161 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3162 int beg; 3163 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3164 const int end = MIN2((int)usable_count, n) - 1; 3165 for (int cur = 0; cur < end; ++cur, ++beg) { 3166 _page_sizes[cur] = _page_sizes[beg]; 3167 } 3168 _page_sizes[end] = vm_page_size(); 3169 _page_sizes[end + 1] = 0; 3170 3171 if (_page_sizes[end] > _page_sizes[end - 1]) { 3172 // Default page size is not the smallest; sort again. 3173 insertion_sort_descending(_page_sizes, end + 1); 3174 } 3175 *page_size = _page_sizes[0]; 3176 3177 return true; 3178} 3179 3180bool os::large_page_init() { 3181 if (!UseLargePages) { 3182 UseISM = false; 3183 UseMPSS = false; 3184 return false; 3185 } 3186 3187 // print a warning if any large page related flag is specified on command line 3188 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3189 !FLAG_IS_DEFAULT(UseISM) || 3190 !FLAG_IS_DEFAULT(UseMPSS) || 3191 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3192 UseISM = UseISM && 3193 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3194 if (UseISM) { 3195 // ISM disables MPSS to be compatible with old JDK behavior 3196 UseMPSS = false; 3197 _page_sizes[0] = _large_page_size; 3198 _page_sizes[1] = vm_page_size(); 3199 } 3200 3201 UseMPSS = UseMPSS && 3202 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3203 3204 UseLargePages = UseISM || UseMPSS; 3205 return UseLargePages; 3206} 3207 3208bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3209 // Signal to OS that we want large pages for addresses 3210 // from addr, addr + bytes 3211 struct memcntl_mha mpss_struct; 3212 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3213 mpss_struct.mha_pagesize = align; 3214 mpss_struct.mha_flags = 0; 3215 if (memcntl(start, bytes, MC_HAT_ADVISE, 3216 (caddr_t) &mpss_struct, 0, 0) < 0) { 3217 debug_only(warning("Attempt to use MPSS failed.")); 3218 return false; 3219 } 3220 return true; 3221} 3222 3223char* os::reserve_memory_special(size_t bytes) { 3224 assert(UseLargePages && UseISM, "only for ISM large pages"); 3225 3226 size_t size = bytes; 3227 char* retAddr = NULL; 3228 int shmid; 3229 key_t ismKey; 3230 3231 bool warn_on_failure = UseISM && 3232 (!FLAG_IS_DEFAULT(UseLargePages) || 3233 !FLAG_IS_DEFAULT(UseISM) || 3234 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3235 ); 3236 char msg[128]; 3237 3238 ismKey = IPC_PRIVATE; 3239 3240 // Create a large shared memory region to attach to based on size. 3241 // Currently, size is the total size of the heap 3242 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3243 if (shmid == -1){ 3244 if (warn_on_failure) { 3245 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3246 warning(msg); 3247 } 3248 return NULL; 3249 } 3250 3251 // Attach to the region 3252 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3253 int err = errno; 3254 3255 // Remove shmid. If shmat() is successful, the actual shared memory segment 3256 // will be deleted when it's detached by shmdt() or when the process 3257 // terminates. If shmat() is not successful this will remove the shared 3258 // segment immediately. 3259 shmctl(shmid, IPC_RMID, NULL); 3260 3261 if (retAddr == (char *) -1) { 3262 if (warn_on_failure) { 3263 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3264 warning(msg); 3265 } 3266 return NULL; 3267 } 3268 3269 return retAddr; 3270} 3271 3272bool os::release_memory_special(char* base, size_t bytes) { 3273 // detaching the SHM segment will also delete it, see reserve_memory_special() 3274 int rslt = shmdt(base); 3275 return rslt == 0; 3276} 3277 3278size_t os::large_page_size() { 3279 return _large_page_size; 3280} 3281 3282// MPSS allows application to commit large page memory on demand; with ISM 3283// the entire memory region must be allocated as shared memory. 3284bool os::can_commit_large_page_memory() { 3285 return UseISM ? false : true; 3286} 3287 3288bool os::can_execute_large_page_memory() { 3289 return UseISM ? false : true; 3290} 3291 3292static int os_sleep(jlong millis, bool interruptible) { 3293 const jlong limit = INT_MAX; 3294 jlong prevtime; 3295 int res; 3296 3297 while (millis > limit) { 3298 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3299 return res; 3300 millis -= limit; 3301 } 3302 3303 // Restart interrupted polls with new parameters until the proper delay 3304 // has been completed. 3305 3306 prevtime = getTimeMillis(); 3307 3308 while (millis > 0) { 3309 jlong newtime; 3310 3311 if (!interruptible) { 3312 // Following assert fails for os::yield_all: 3313 // assert(!thread->is_Java_thread(), "must not be java thread"); 3314 res = poll(NULL, 0, millis); 3315 } else { 3316 JavaThread *jt = JavaThread::current(); 3317 3318 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3319 os::Solaris::clear_interrupted); 3320 } 3321 3322 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3323 // thread.Interrupt. 3324 3325 if((res == OS_ERR) && (errno == EINTR)) { 3326 newtime = getTimeMillis(); 3327 assert(newtime >= prevtime, "time moving backwards"); 3328 /* Doing prevtime and newtime in microseconds doesn't help precision, 3329 and trying to round up to avoid lost milliseconds can result in a 3330 too-short delay. */ 3331 millis -= newtime - prevtime; 3332 if(millis <= 0) 3333 return OS_OK; 3334 prevtime = newtime; 3335 } else 3336 return res; 3337 } 3338 3339 return OS_OK; 3340} 3341 3342// Read calls from inside the vm need to perform state transitions 3343size_t os::read(int fd, void *buf, unsigned int nBytes) { 3344 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3345} 3346 3347int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3348 assert(thread == Thread::current(), "thread consistency check"); 3349 3350 // TODO-FIXME: this should be removed. 3351 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3352 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3353 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3354 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3355 // is fooled into believing that the system is making progress. In the code below we block the 3356 // the watcher thread while safepoint is in progress so that it would not appear as though the 3357 // system is making progress. 3358 if (!Solaris::T2_libthread() && 3359 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3360 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3361 // the entire safepoint, the watcher thread will line up here during the safepoint. 3362 Threads_lock->lock_without_safepoint_check(); 3363 Threads_lock->unlock(); 3364 } 3365 3366 if (thread->is_Java_thread()) { 3367 // This is a JavaThread so we honor the _thread_blocked protocol 3368 // even for sleeps of 0 milliseconds. This was originally done 3369 // as a workaround for bug 4338139. However, now we also do it 3370 // to honor the suspend-equivalent protocol. 3371 3372 JavaThread *jt = (JavaThread *) thread; 3373 ThreadBlockInVM tbivm(jt); 3374 3375 jt->set_suspend_equivalent(); 3376 // cleared by handle_special_suspend_equivalent_condition() or 3377 // java_suspend_self() via check_and_wait_while_suspended() 3378 3379 int ret_code; 3380 if (millis <= 0) { 3381 thr_yield(); 3382 ret_code = 0; 3383 } else { 3384 // The original sleep() implementation did not create an 3385 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3386 // I'm preserving that decision for now. 3387 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3388 3389 ret_code = os_sleep(millis, interruptible); 3390 } 3391 3392 // were we externally suspended while we were waiting? 3393 jt->check_and_wait_while_suspended(); 3394 3395 return ret_code; 3396 } 3397 3398 // non-JavaThread from this point on: 3399 3400 if (millis <= 0) { 3401 thr_yield(); 3402 return 0; 3403 } 3404 3405 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3406 3407 return os_sleep(millis, interruptible); 3408} 3409 3410int os::naked_sleep() { 3411 // %% make the sleep time an integer flag. for now use 1 millisec. 3412 return os_sleep(1, false); 3413} 3414 3415// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3416void os::infinite_sleep() { 3417 while (true) { // sleep forever ... 3418 ::sleep(100); // ... 100 seconds at a time 3419 } 3420} 3421 3422// Used to convert frequent JVM_Yield() to nops 3423bool os::dont_yield() { 3424 if (DontYieldALot) { 3425 static hrtime_t last_time = 0; 3426 hrtime_t diff = getTimeNanos() - last_time; 3427 3428 if (diff < DontYieldALotInterval * 1000000) 3429 return true; 3430 3431 last_time += diff; 3432 3433 return false; 3434 } 3435 else { 3436 return false; 3437 } 3438} 3439 3440// Caveat: Solaris os::yield() causes a thread-state transition whereas 3441// the linux and win32 implementations do not. This should be checked. 3442 3443void os::yield() { 3444 // Yields to all threads with same or greater priority 3445 os::sleep(Thread::current(), 0, false); 3446} 3447 3448// Note that yield semantics are defined by the scheduling class to which 3449// the thread currently belongs. Typically, yield will _not yield to 3450// other equal or higher priority threads that reside on the dispatch queues 3451// of other CPUs. 3452 3453os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3454 3455 3456// On Solaris we found that yield_all doesn't always yield to all other threads. 3457// There have been cases where there is a thread ready to execute but it doesn't 3458// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3459// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3460// SIGWAITING signal which will cause a new lwp to be created. So we count the 3461// number of times yield_all is called in the one loop and increase the sleep 3462// time after 8 attempts. If this fails too we increase the concurrency level 3463// so that the starving thread would get an lwp 3464 3465void os::yield_all(int attempts) { 3466 // Yields to all threads, including threads with lower priorities 3467 if (attempts == 0) { 3468 os::sleep(Thread::current(), 1, false); 3469 } else { 3470 int iterations = attempts % 30; 3471 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3472 // thr_setconcurrency and _getconcurrency make sense only under T1. 3473 int noofLWPS = thr_getconcurrency(); 3474 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3475 thr_setconcurrency(thr_getconcurrency() + 1); 3476 } 3477 } else if (iterations < 25) { 3478 os::sleep(Thread::current(), 1, false); 3479 } else { 3480 os::sleep(Thread::current(), 10, false); 3481 } 3482 } 3483} 3484 3485// Called from the tight loops to possibly influence time-sharing heuristics 3486void os::loop_breaker(int attempts) { 3487 os::yield_all(attempts); 3488} 3489 3490 3491// Interface for setting lwp priorities. If we are using T2 libthread, 3492// which forces the use of BoundThreads or we manually set UseBoundThreads, 3493// all of our threads will be assigned to real lwp's. Using the thr_setprio 3494// function is meaningless in this mode so we must adjust the real lwp's priority 3495// The routines below implement the getting and setting of lwp priorities. 3496// 3497// Note: There are three priority scales used on Solaris. Java priotities 3498// which range from 1 to 10, libthread "thr_setprio" scale which range 3499// from 0 to 127, and the current scheduling class of the process we 3500// are running in. This is typically from -60 to +60. 3501// The setting of the lwp priorities in done after a call to thr_setprio 3502// so Java priorities are mapped to libthread priorities and we map from 3503// the latter to lwp priorities. We don't keep priorities stored in 3504// Java priorities since some of our worker threads want to set priorities 3505// higher than all Java threads. 3506// 3507// For related information: 3508// (1) man -s 2 priocntl 3509// (2) man -s 4 priocntl 3510// (3) man dispadmin 3511// = librt.so 3512// = libthread/common/rtsched.c - thrp_setlwpprio(). 3513// = ps -cL <pid> ... to validate priority. 3514// = sched_get_priority_min and _max 3515// pthread_create 3516// sched_setparam 3517// pthread_setschedparam 3518// 3519// Assumptions: 3520// + We assume that all threads in the process belong to the same 3521// scheduling class. IE. an homogenous process. 3522// + Must be root or in IA group to change change "interactive" attribute. 3523// Priocntl() will fail silently. The only indication of failure is when 3524// we read-back the value and notice that it hasn't changed. 3525// + Interactive threads enter the runq at the head, non-interactive at the tail. 3526// + For RT, change timeslice as well. Invariant: 3527// constant "priority integral" 3528// Konst == TimeSlice * (60-Priority) 3529// Given a priority, compute appropriate timeslice. 3530// + Higher numerical values have higher priority. 3531 3532// sched class attributes 3533typedef struct { 3534 int schedPolicy; // classID 3535 int maxPrio; 3536 int minPrio; 3537} SchedInfo; 3538 3539 3540static SchedInfo tsLimits, iaLimits, rtLimits; 3541 3542#ifdef ASSERT 3543static int ReadBackValidate = 1; 3544#endif 3545static int myClass = 0; 3546static int myMin = 0; 3547static int myMax = 0; 3548static int myCur = 0; 3549static bool priocntl_enable = false; 3550 3551 3552// Call the version of priocntl suitable for all supported versions 3553// of Solaris. We need to call through this wrapper so that we can 3554// build on Solaris 9 and run on Solaris 8, 9 and 10. 3555// 3556// This code should be removed if we ever stop supporting Solaris 8 3557// and earlier releases. 3558 3559static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3560typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3561static priocntl_type priocntl_ptr = priocntl_stub; 3562 3563// Stub to set the value of the real pointer, and then call the real 3564// function. 3565 3566static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3567 // Try Solaris 8- name only. 3568 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3569 guarantee(tmp != NULL, "priocntl function not found."); 3570 priocntl_ptr = tmp; 3571 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3572} 3573 3574 3575// lwp_priocntl_init 3576// 3577// Try to determine the priority scale for our process. 3578// 3579// Return errno or 0 if OK. 3580// 3581static 3582int lwp_priocntl_init () 3583{ 3584 int rslt; 3585 pcinfo_t ClassInfo; 3586 pcparms_t ParmInfo; 3587 int i; 3588 3589 if (!UseThreadPriorities) return 0; 3590 3591 // We are using Bound threads, we need to determine our priority ranges 3592 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3593 // If ThreadPriorityPolicy is 1, switch tables 3594 if (ThreadPriorityPolicy == 1) { 3595 for (i = 0 ; i < MaxPriority+1; i++) 3596 os::java_to_os_priority[i] = prio_policy1[i]; 3597 } 3598 } 3599 // Not using Bound Threads, set to ThreadPolicy 1 3600 else { 3601 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3602 os::java_to_os_priority[i] = prio_policy1[i]; 3603 } 3604 return 0; 3605 } 3606 3607 3608 // Get IDs for a set of well-known scheduling classes. 3609 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3610 // the system. We should have a loop that iterates over the 3611 // classID values, which are known to be "small" integers. 3612 3613 strcpy(ClassInfo.pc_clname, "TS"); 3614 ClassInfo.pc_cid = -1; 3615 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3616 if (rslt < 0) return errno; 3617 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3618 tsLimits.schedPolicy = ClassInfo.pc_cid; 3619 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3620 tsLimits.minPrio = -tsLimits.maxPrio; 3621 3622 strcpy(ClassInfo.pc_clname, "IA"); 3623 ClassInfo.pc_cid = -1; 3624 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3625 if (rslt < 0) return errno; 3626 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3627 iaLimits.schedPolicy = ClassInfo.pc_cid; 3628 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3629 iaLimits.minPrio = -iaLimits.maxPrio; 3630 3631 strcpy(ClassInfo.pc_clname, "RT"); 3632 ClassInfo.pc_cid = -1; 3633 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3634 if (rslt < 0) return errno; 3635 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3636 rtLimits.schedPolicy = ClassInfo.pc_cid; 3637 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3638 rtLimits.minPrio = 0; 3639 3640 3641 // Query our "current" scheduling class. 3642 // This will normally be IA,TS or, rarely, RT. 3643 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3644 ParmInfo.pc_cid = PC_CLNULL; 3645 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3646 if ( rslt < 0 ) return errno; 3647 myClass = ParmInfo.pc_cid; 3648 3649 // We now know our scheduling classId, get specific information 3650 // the class. 3651 ClassInfo.pc_cid = myClass; 3652 ClassInfo.pc_clname[0] = 0; 3653 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3654 if ( rslt < 0 ) return errno; 3655 3656 if (ThreadPriorityVerbose) 3657 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3658 3659 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3660 ParmInfo.pc_cid = PC_CLNULL; 3661 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3662 if (rslt < 0) return errno; 3663 3664 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3665 myMin = rtLimits.minPrio; 3666 myMax = rtLimits.maxPrio; 3667 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3668 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3669 myMin = iaLimits.minPrio; 3670 myMax = iaLimits.maxPrio; 3671 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3672 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3673 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3674 myMin = tsLimits.minPrio; 3675 myMax = tsLimits.maxPrio; 3676 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3677 } else { 3678 // No clue - punt 3679 if (ThreadPriorityVerbose) 3680 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3681 return EINVAL; // no clue, punt 3682 } 3683 3684 if (ThreadPriorityVerbose) 3685 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3686 3687 priocntl_enable = true; // Enable changing priorities 3688 return 0; 3689} 3690 3691#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3692#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3693#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3694 3695 3696// scale_to_lwp_priority 3697// 3698// Convert from the libthread "thr_setprio" scale to our current 3699// lwp scheduling class scale. 3700// 3701static 3702int scale_to_lwp_priority (int rMin, int rMax, int x) 3703{ 3704 int v; 3705 3706 if (x == 127) return rMax; // avoid round-down 3707 v = (((x*(rMax-rMin)))/128)+rMin; 3708 return v; 3709} 3710 3711 3712// set_lwp_priority 3713// 3714// Set the priority of the lwp. This call should only be made 3715// when using bound threads (T2 threads are bound by default). 3716// 3717int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3718{ 3719 int rslt; 3720 int Actual, Expected, prv; 3721 pcparms_t ParmInfo; // for GET-SET 3722#ifdef ASSERT 3723 pcparms_t ReadBack; // for readback 3724#endif 3725 3726 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3727 // Query current values. 3728 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3729 // Cache "pcparms_t" in global ParmCache. 3730 // TODO: elide set-to-same-value 3731 3732 // If something went wrong on init, don't change priorities. 3733 if ( !priocntl_enable ) { 3734 if (ThreadPriorityVerbose) 3735 tty->print_cr("Trying to set priority but init failed, ignoring"); 3736 return EINVAL; 3737 } 3738 3739 3740 // If lwp hasn't started yet, just return 3741 // the _start routine will call us again. 3742 if ( lwpid <= 0 ) { 3743 if (ThreadPriorityVerbose) { 3744 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3745 ThreadID, newPrio); 3746 } 3747 return 0; 3748 } 3749 3750 if (ThreadPriorityVerbose) { 3751 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3752 ThreadID, lwpid, newPrio); 3753 } 3754 3755 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3756 ParmInfo.pc_cid = PC_CLNULL; 3757 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3758 if (rslt < 0) return errno; 3759 3760 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3761 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3762 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3763 rtInfo->rt_tqsecs = RT_NOCHANGE; 3764 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3765 if (ThreadPriorityVerbose) { 3766 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3767 } 3768 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3769 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3770 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3771 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3772 iaInfo->ia_uprilim = IA_NOCHANGE; 3773 iaInfo->ia_mode = IA_NOCHANGE; 3774 if (ThreadPriorityVerbose) { 3775 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3776 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3777 } 3778 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3779 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3780 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3781 prv = tsInfo->ts_upri; 3782 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3783 tsInfo->ts_uprilim = IA_NOCHANGE; 3784 if (ThreadPriorityVerbose) { 3785 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3786 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3787 } 3788 if (prv == tsInfo->ts_upri) return 0; 3789 } else { 3790 if ( ThreadPriorityVerbose ) { 3791 tty->print_cr ("Unknown scheduling class\n"); 3792 } 3793 return EINVAL; // no clue, punt 3794 } 3795 3796 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3797 if (ThreadPriorityVerbose && rslt) { 3798 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3799 } 3800 if (rslt < 0) return errno; 3801 3802#ifdef ASSERT 3803 // Sanity check: read back what we just attempted to set. 3804 // In theory it could have changed in the interim ... 3805 // 3806 // The priocntl system call is tricky. 3807 // Sometimes it'll validate the priority value argument and 3808 // return EINVAL if unhappy. At other times it fails silently. 3809 // Readbacks are prudent. 3810 3811 if (!ReadBackValidate) return 0; 3812 3813 memset(&ReadBack, 0, sizeof(pcparms_t)); 3814 ReadBack.pc_cid = PC_CLNULL; 3815 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3816 assert(rslt >= 0, "priocntl failed"); 3817 Actual = Expected = 0xBAD; 3818 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3819 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3820 Actual = RTPRI(ReadBack)->rt_pri; 3821 Expected = RTPRI(ParmInfo)->rt_pri; 3822 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3823 Actual = IAPRI(ReadBack)->ia_upri; 3824 Expected = IAPRI(ParmInfo)->ia_upri; 3825 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3826 Actual = TSPRI(ReadBack)->ts_upri; 3827 Expected = TSPRI(ParmInfo)->ts_upri; 3828 } else { 3829 if ( ThreadPriorityVerbose ) { 3830 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3831 } 3832 } 3833 3834 if (Actual != Expected) { 3835 if ( ThreadPriorityVerbose ) { 3836 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3837 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3838 } 3839 } 3840#endif 3841 3842 return 0; 3843} 3844 3845 3846 3847// Solaris only gives access to 128 real priorities at a time, 3848// so we expand Java's ten to fill this range. This would be better 3849// if we dynamically adjusted relative priorities. 3850// 3851// The ThreadPriorityPolicy option allows us to select 2 different 3852// priority scales. 3853// 3854// ThreadPriorityPolicy=0 3855// Since the Solaris' default priority is MaximumPriority, we do not 3856// set a priority lower than Max unless a priority lower than 3857// NormPriority is requested. 3858// 3859// ThreadPriorityPolicy=1 3860// This mode causes the priority table to get filled with 3861// linear values. NormPriority get's mapped to 50% of the 3862// Maximum priority an so on. This will cause VM threads 3863// to get unfair treatment against other Solaris processes 3864// which do not explicitly alter their thread priorities. 3865// 3866 3867 3868int os::java_to_os_priority[MaxPriority + 1] = { 3869 -99999, // 0 Entry should never be used 3870 3871 0, // 1 MinPriority 3872 32, // 2 3873 64, // 3 3874 3875 96, // 4 3876 127, // 5 NormPriority 3877 127, // 6 3878 3879 127, // 7 3880 127, // 8 3881 127, // 9 NearMaxPriority 3882 3883 127 // 10 MaxPriority 3884}; 3885 3886 3887OSReturn os::set_native_priority(Thread* thread, int newpri) { 3888 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3889 if ( !UseThreadPriorities ) return OS_OK; 3890 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3891 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3892 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3893 thread->osthread()->lwp_id(), newpri )); 3894 return (status == 0) ? OS_OK : OS_ERR; 3895} 3896 3897 3898OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3899 int p; 3900 if ( !UseThreadPriorities ) { 3901 *priority_ptr = NormalPriority; 3902 return OS_OK; 3903 } 3904 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3905 if (status != 0) { 3906 return OS_ERR; 3907 } 3908 *priority_ptr = p; 3909 return OS_OK; 3910} 3911 3912 3913// Hint to the underlying OS that a task switch would not be good. 3914// Void return because it's a hint and can fail. 3915void os::hint_no_preempt() { 3916 schedctl_start(schedctl_init()); 3917} 3918 3919void os::interrupt(Thread* thread) { 3920 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3921 3922 OSThread* osthread = thread->osthread(); 3923 3924 int isInterrupted = osthread->interrupted(); 3925 if (!isInterrupted) { 3926 osthread->set_interrupted(true); 3927 OrderAccess::fence(); 3928 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3929 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3930 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3931 ParkEvent * const slp = thread->_SleepEvent ; 3932 if (slp != NULL) slp->unpark() ; 3933 } 3934 3935 // For JSR166: unpark after setting status but before thr_kill -dl 3936 if (thread->is_Java_thread()) { 3937 ((JavaThread*)thread)->parker()->unpark(); 3938 } 3939 3940 // Handle interruptible wait() ... 3941 ParkEvent * const ev = thread->_ParkEvent ; 3942 if (ev != NULL) ev->unpark() ; 3943 3944 // When events are used everywhere for os::sleep, then this thr_kill 3945 // will only be needed if UseVMInterruptibleIO is true. 3946 3947 if (!isInterrupted) { 3948 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3949 assert_status(status == 0, status, "thr_kill"); 3950 3951 // Bump thread interruption counter 3952 RuntimeService::record_thread_interrupt_signaled_count(); 3953 } 3954} 3955 3956 3957bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3958 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3959 3960 OSThread* osthread = thread->osthread(); 3961 3962 bool res = osthread->interrupted(); 3963 3964 // NOTE that since there is no "lock" around these two operations, 3965 // there is the possibility that the interrupted flag will be 3966 // "false" but that the interrupt event will be set. This is 3967 // intentional. The effect of this is that Object.wait() will appear 3968 // to have a spurious wakeup, which is not harmful, and the 3969 // possibility is so rare that it is not worth the added complexity 3970 // to add yet another lock. It has also been recommended not to put 3971 // the interrupted flag into the os::Solaris::Event structure, 3972 // because it hides the issue. 3973 if (res && clear_interrupted) { 3974 osthread->set_interrupted(false); 3975 } 3976 return res; 3977} 3978 3979 3980void os::print_statistics() { 3981} 3982 3983int os::message_box(const char* title, const char* message) { 3984 int i; 3985 fdStream err(defaultStream::error_fd()); 3986 for (i = 0; i < 78; i++) err.print_raw("="); 3987 err.cr(); 3988 err.print_raw_cr(title); 3989 for (i = 0; i < 78; i++) err.print_raw("-"); 3990 err.cr(); 3991 err.print_raw_cr(message); 3992 for (i = 0; i < 78; i++) err.print_raw("="); 3993 err.cr(); 3994 3995 char buf[16]; 3996 // Prevent process from exiting upon "read error" without consuming all CPU 3997 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3998 3999 return buf[0] == 'y' || buf[0] == 'Y'; 4000} 4001 4002// A lightweight implementation that does not suspend the target thread and 4003// thus returns only a hint. Used for profiling only! 4004ExtendedPC os::get_thread_pc(Thread* thread) { 4005 // Make sure that it is called by the watcher and the Threads lock is owned. 4006 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 4007 // For now, is only used to profile the VM Thread 4008 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 4009 ExtendedPC epc; 4010 4011 GetThreadPC_Callback cb(ProfileVM_lock); 4012 OSThread *osthread = thread->osthread(); 4013 const int time_to_wait = 400; // 400ms wait for initial response 4014 int status = cb.interrupt(thread, time_to_wait); 4015 4016 if (cb.is_done() ) { 4017 epc = cb.addr(); 4018 } else { 4019 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4020 osthread->thread_id(), status);); 4021 // epc is already NULL 4022 } 4023 return epc; 4024} 4025 4026 4027// This does not do anything on Solaris. This is basically a hook for being 4028// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4029void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4030 f(value, method, args, thread); 4031} 4032 4033// This routine may be used by user applications as a "hook" to catch signals. 4034// The user-defined signal handler must pass unrecognized signals to this 4035// routine, and if it returns true (non-zero), then the signal handler must 4036// return immediately. If the flag "abort_if_unrecognized" is true, then this 4037// routine will never retun false (zero), but instead will execute a VM panic 4038// routine kill the process. 4039// 4040// If this routine returns false, it is OK to call it again. This allows 4041// the user-defined signal handler to perform checks either before or after 4042// the VM performs its own checks. Naturally, the user code would be making 4043// a serious error if it tried to handle an exception (such as a null check 4044// or breakpoint) that the VM was generating for its own correct operation. 4045// 4046// This routine may recognize any of the following kinds of signals: 4047// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4048// os::Solaris::SIGasync 4049// It should be consulted by handlers for any of those signals. 4050// It explicitly does not recognize os::Solaris::SIGinterrupt 4051// 4052// The caller of this routine must pass in the three arguments supplied 4053// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4054// field of the structure passed to sigaction(). This routine assumes that 4055// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4056// 4057// Note that the VM will print warnings if it detects conflicting signal 4058// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4059// 4060extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4061 4062 4063void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4064 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4065} 4066 4067/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4068 is needed to provoke threads blocked on IO to return an EINTR 4069 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4070 does NOT participate in signal chaining due to requirement for 4071 NOT setting SA_RESTART to make EINTR work. */ 4072extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4073 if (UseSignalChaining) { 4074 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4075 if (actp && actp->sa_handler) { 4076 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4077 } 4078 } 4079} 4080 4081// This boolean allows users to forward their own non-matching signals 4082// to JVM_handle_solaris_signal, harmlessly. 4083bool os::Solaris::signal_handlers_are_installed = false; 4084 4085// For signal-chaining 4086bool os::Solaris::libjsig_is_loaded = false; 4087typedef struct sigaction *(*get_signal_t)(int); 4088get_signal_t os::Solaris::get_signal_action = NULL; 4089 4090struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4091 struct sigaction *actp = NULL; 4092 4093 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4094 // Retrieve the old signal handler from libjsig 4095 actp = (*get_signal_action)(sig); 4096 } 4097 if (actp == NULL) { 4098 // Retrieve the preinstalled signal handler from jvm 4099 actp = get_preinstalled_handler(sig); 4100 } 4101 4102 return actp; 4103} 4104 4105static bool call_chained_handler(struct sigaction *actp, int sig, 4106 siginfo_t *siginfo, void *context) { 4107 // Call the old signal handler 4108 if (actp->sa_handler == SIG_DFL) { 4109 // It's more reasonable to let jvm treat it as an unexpected exception 4110 // instead of taking the default action. 4111 return false; 4112 } else if (actp->sa_handler != SIG_IGN) { 4113 if ((actp->sa_flags & SA_NODEFER) == 0) { 4114 // automaticlly block the signal 4115 sigaddset(&(actp->sa_mask), sig); 4116 } 4117 4118 sa_handler_t hand; 4119 sa_sigaction_t sa; 4120 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4121 // retrieve the chained handler 4122 if (siginfo_flag_set) { 4123 sa = actp->sa_sigaction; 4124 } else { 4125 hand = actp->sa_handler; 4126 } 4127 4128 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4129 actp->sa_handler = SIG_DFL; 4130 } 4131 4132 // try to honor the signal mask 4133 sigset_t oset; 4134 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4135 4136 // call into the chained handler 4137 if (siginfo_flag_set) { 4138 (*sa)(sig, siginfo, context); 4139 } else { 4140 (*hand)(sig); 4141 } 4142 4143 // restore the signal mask 4144 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4145 } 4146 // Tell jvm's signal handler the signal is taken care of. 4147 return true; 4148} 4149 4150bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4151 bool chained = false; 4152 // signal-chaining 4153 if (UseSignalChaining) { 4154 struct sigaction *actp = get_chained_signal_action(sig); 4155 if (actp != NULL) { 4156 chained = call_chained_handler(actp, sig, siginfo, context); 4157 } 4158 } 4159 return chained; 4160} 4161 4162struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4163 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4164 if (preinstalled_sigs[sig] != 0) { 4165 return &chainedsigactions[sig]; 4166 } 4167 return NULL; 4168} 4169 4170void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4171 4172 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4173 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4174 chainedsigactions[sig] = oldAct; 4175 preinstalled_sigs[sig] = 1; 4176} 4177 4178void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4179 // Check for overwrite. 4180 struct sigaction oldAct; 4181 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4182 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4183 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4184 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4185 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4186 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4187 if (AllowUserSignalHandlers || !set_installed) { 4188 // Do not overwrite; user takes responsibility to forward to us. 4189 return; 4190 } else if (UseSignalChaining) { 4191 if (oktochain) { 4192 // save the old handler in jvm 4193 save_preinstalled_handler(sig, oldAct); 4194 } else { 4195 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4196 } 4197 // libjsig also interposes the sigaction() call below and saves the 4198 // old sigaction on it own. 4199 } else { 4200 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4201 } 4202 } 4203 4204 struct sigaction sigAct; 4205 sigfillset(&(sigAct.sa_mask)); 4206 sigAct.sa_handler = SIG_DFL; 4207 4208 sigAct.sa_sigaction = signalHandler; 4209 // Handle SIGSEGV on alternate signal stack if 4210 // not using stack banging 4211 if (!UseStackBanging && sig == SIGSEGV) { 4212 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4213 // Interruptible i/o requires SA_RESTART cleared so EINTR 4214 // is returned instead of restarting system calls 4215 } else if (sig == os::Solaris::SIGinterrupt()) { 4216 sigemptyset(&sigAct.sa_mask); 4217 sigAct.sa_handler = NULL; 4218 sigAct.sa_flags = SA_SIGINFO; 4219 sigAct.sa_sigaction = sigINTRHandler; 4220 } else { 4221 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4222 } 4223 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4224 4225 sigaction(sig, &sigAct, &oldAct); 4226 4227 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4228 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4229 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4230} 4231 4232 4233#define DO_SIGNAL_CHECK(sig) \ 4234 if (!sigismember(&check_signal_done, sig)) \ 4235 os::Solaris::check_signal_handler(sig) 4236 4237// This method is a periodic task to check for misbehaving JNI applications 4238// under CheckJNI, we can add any periodic checks here 4239 4240void os::run_periodic_checks() { 4241 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4242 // thereby preventing a NULL checks. 4243 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4244 4245 if (check_signals == false) return; 4246 4247 // SEGV and BUS if overridden could potentially prevent 4248 // generation of hs*.log in the event of a crash, debugging 4249 // such a case can be very challenging, so we absolutely 4250 // check for the following for a good measure: 4251 DO_SIGNAL_CHECK(SIGSEGV); 4252 DO_SIGNAL_CHECK(SIGILL); 4253 DO_SIGNAL_CHECK(SIGFPE); 4254 DO_SIGNAL_CHECK(SIGBUS); 4255 DO_SIGNAL_CHECK(SIGPIPE); 4256 DO_SIGNAL_CHECK(SIGXFSZ); 4257 4258 // ReduceSignalUsage allows the user to override these handlers 4259 // see comments at the very top and jvm_solaris.h 4260 if (!ReduceSignalUsage) { 4261 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4262 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4263 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4264 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4265 } 4266 4267 // See comments above for using JVM1/JVM2 and UseAltSigs 4268 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4269 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4270 4271} 4272 4273typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4274 4275static os_sigaction_t os_sigaction = NULL; 4276 4277void os::Solaris::check_signal_handler(int sig) { 4278 char buf[O_BUFLEN]; 4279 address jvmHandler = NULL; 4280 4281 struct sigaction act; 4282 if (os_sigaction == NULL) { 4283 // only trust the default sigaction, in case it has been interposed 4284 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4285 if (os_sigaction == NULL) return; 4286 } 4287 4288 os_sigaction(sig, (struct sigaction*)NULL, &act); 4289 4290 address thisHandler = (act.sa_flags & SA_SIGINFO) 4291 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4292 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4293 4294 4295 switch(sig) { 4296 case SIGSEGV: 4297 case SIGBUS: 4298 case SIGFPE: 4299 case SIGPIPE: 4300 case SIGXFSZ: 4301 case SIGILL: 4302 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4303 break; 4304 4305 case SHUTDOWN1_SIGNAL: 4306 case SHUTDOWN2_SIGNAL: 4307 case SHUTDOWN3_SIGNAL: 4308 case BREAK_SIGNAL: 4309 jvmHandler = (address)user_handler(); 4310 break; 4311 4312 default: 4313 int intrsig = os::Solaris::SIGinterrupt(); 4314 int asynsig = os::Solaris::SIGasync(); 4315 4316 if (sig == intrsig) { 4317 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4318 } else if (sig == asynsig) { 4319 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4320 } else { 4321 return; 4322 } 4323 break; 4324 } 4325 4326 4327 if (thisHandler != jvmHandler) { 4328 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4329 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4330 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4331 // No need to check this sig any longer 4332 sigaddset(&check_signal_done, sig); 4333 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4334 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4335 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4336 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4337 // No need to check this sig any longer 4338 sigaddset(&check_signal_done, sig); 4339 } 4340 4341 // Print all the signal handler state 4342 if (sigismember(&check_signal_done, sig)) { 4343 print_signal_handlers(tty, buf, O_BUFLEN); 4344 } 4345 4346} 4347 4348void os::Solaris::install_signal_handlers() { 4349 bool libjsigdone = false; 4350 signal_handlers_are_installed = true; 4351 4352 // signal-chaining 4353 typedef void (*signal_setting_t)(); 4354 signal_setting_t begin_signal_setting = NULL; 4355 signal_setting_t end_signal_setting = NULL; 4356 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4357 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4358 if (begin_signal_setting != NULL) { 4359 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4360 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4361 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4362 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4363 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4364 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4365 libjsig_is_loaded = true; 4366 if (os::Solaris::get_libjsig_version != NULL) { 4367 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4368 } 4369 assert(UseSignalChaining, "should enable signal-chaining"); 4370 } 4371 if (libjsig_is_loaded) { 4372 // Tell libjsig jvm is setting signal handlers 4373 (*begin_signal_setting)(); 4374 } 4375 4376 set_signal_handler(SIGSEGV, true, true); 4377 set_signal_handler(SIGPIPE, true, true); 4378 set_signal_handler(SIGXFSZ, true, true); 4379 set_signal_handler(SIGBUS, true, true); 4380 set_signal_handler(SIGILL, true, true); 4381 set_signal_handler(SIGFPE, true, true); 4382 4383 4384 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4385 4386 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4387 // can not register overridable signals which might be > 32 4388 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4389 // Tell libjsig jvm has finished setting signal handlers 4390 (*end_signal_setting)(); 4391 libjsigdone = true; 4392 } 4393 } 4394 4395 // Never ok to chain our SIGinterrupt 4396 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4397 set_signal_handler(os::Solaris::SIGasync(), true, true); 4398 4399 if (libjsig_is_loaded && !libjsigdone) { 4400 // Tell libjsig jvm finishes setting signal handlers 4401 (*end_signal_setting)(); 4402 } 4403 4404 // We don't activate signal checker if libjsig is in place, we trust ourselves 4405 // and if UserSignalHandler is installed all bets are off 4406 if (CheckJNICalls) { 4407 if (libjsig_is_loaded) { 4408 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4409 check_signals = false; 4410 } 4411 if (AllowUserSignalHandlers) { 4412 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4413 check_signals = false; 4414 } 4415 } 4416} 4417 4418 4419void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4420 4421const char * signames[] = { 4422 "SIG0", 4423 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4424 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4425 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4426 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4427 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4428 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4429 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4430 "SIGCANCEL", "SIGLOST" 4431}; 4432 4433const char* os::exception_name(int exception_code, char* buf, size_t size) { 4434 if (0 < exception_code && exception_code <= SIGRTMAX) { 4435 // signal 4436 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4437 jio_snprintf(buf, size, "%s", signames[exception_code]); 4438 } else { 4439 jio_snprintf(buf, size, "SIG%d", exception_code); 4440 } 4441 return buf; 4442 } else { 4443 return NULL; 4444 } 4445} 4446 4447// (Static) wrappers for the new libthread API 4448int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4449int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4450int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4451int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4452int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4453 4454// (Static) wrappers for the liblgrp API 4455os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4456os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4457os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4458os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4459os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4460os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4461os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4462os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4463os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4464 4465// (Static) wrapper for meminfo() call. 4466os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4467 4468static address resolve_symbol(const char *name) { 4469 address addr; 4470 4471 addr = (address) dlsym(RTLD_DEFAULT, name); 4472 if(addr == NULL) { 4473 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4474 addr = (address) dlsym(RTLD_NEXT, name); 4475 if(addr == NULL) { 4476 fatal(dlerror()); 4477 } 4478 } 4479 return addr; 4480} 4481 4482 4483 4484// isT2_libthread() 4485// 4486// Routine to determine if we are currently using the new T2 libthread. 4487// 4488// We determine if we are using T2 by reading /proc/self/lstatus and 4489// looking for a thread with the ASLWP bit set. If we find this status 4490// bit set, we must assume that we are NOT using T2. The T2 team 4491// has approved this algorithm. 4492// 4493// We need to determine if we are running with the new T2 libthread 4494// since setting native thread priorities is handled differently 4495// when using this library. All threads created using T2 are bound 4496// threads. Calling thr_setprio is meaningless in this case. 4497// 4498bool isT2_libthread() { 4499 static prheader_t * lwpArray = NULL; 4500 static int lwpSize = 0; 4501 static int lwpFile = -1; 4502 lwpstatus_t * that; 4503 char lwpName [128]; 4504 bool isT2 = false; 4505 4506#define ADR(x) ((uintptr_t)(x)) 4507#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4508 4509 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4510 if (lwpFile < 0) { 4511 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4512 return false; 4513 } 4514 lwpSize = 16*1024; 4515 for (;;) { 4516 lseek (lwpFile, 0, SEEK_SET); 4517 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4518 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4519 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4520 break; 4521 } 4522 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4523 // We got a good snapshot - now iterate over the list. 4524 int aslwpcount = 0; 4525 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4526 that = LWPINDEX(lwpArray,i); 4527 if (that->pr_flags & PR_ASLWP) { 4528 aslwpcount++; 4529 } 4530 } 4531 if (aslwpcount == 0) isT2 = true; 4532 break; 4533 } 4534 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4535 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4536 } 4537 4538 FREE_C_HEAP_ARRAY(char, lwpArray); 4539 close (lwpFile); 4540 if (ThreadPriorityVerbose) { 4541 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4542 else tty->print_cr("We are not running with a T2 libthread\n"); 4543 } 4544 return isT2; 4545} 4546 4547 4548void os::Solaris::libthread_init() { 4549 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4550 4551 // Determine if we are running with the new T2 libthread 4552 os::Solaris::set_T2_libthread(isT2_libthread()); 4553 4554 lwp_priocntl_init(); 4555 4556 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4557 if(func == NULL) { 4558 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4559 // Guarantee that this VM is running on an new enough OS (5.6 or 4560 // later) that it will have a new enough libthread.so. 4561 guarantee(func != NULL, "libthread.so is too old."); 4562 } 4563 4564 // Initialize the new libthread getstate API wrappers 4565 func = resolve_symbol("thr_getstate"); 4566 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4567 4568 func = resolve_symbol("thr_setstate"); 4569 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4570 4571 func = resolve_symbol("thr_setmutator"); 4572 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4573 4574 func = resolve_symbol("thr_suspend_mutator"); 4575 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4576 4577 func = resolve_symbol("thr_continue_mutator"); 4578 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4579 4580 int size; 4581 void (*handler_info_func)(address *, int *); 4582 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4583 handler_info_func(&handler_start, &size); 4584 handler_end = handler_start + size; 4585} 4586 4587 4588int_fnP_mutex_tP os::Solaris::_mutex_lock; 4589int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4590int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4591int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4592int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4593int os::Solaris::_mutex_scope = USYNC_THREAD; 4594 4595int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4596int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4597int_fnP_cond_tP os::Solaris::_cond_signal; 4598int_fnP_cond_tP os::Solaris::_cond_broadcast; 4599int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4600int_fnP_cond_tP os::Solaris::_cond_destroy; 4601int os::Solaris::_cond_scope = USYNC_THREAD; 4602 4603void os::Solaris::synchronization_init() { 4604 if(UseLWPSynchronization) { 4605 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4606 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4607 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4608 os::Solaris::set_mutex_init(lwp_mutex_init); 4609 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4610 os::Solaris::set_mutex_scope(USYNC_THREAD); 4611 4612 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4613 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4614 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4615 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4616 os::Solaris::set_cond_init(lwp_cond_init); 4617 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4618 os::Solaris::set_cond_scope(USYNC_THREAD); 4619 } 4620 else { 4621 os::Solaris::set_mutex_scope(USYNC_THREAD); 4622 os::Solaris::set_cond_scope(USYNC_THREAD); 4623 4624 if(UsePthreads) { 4625 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4626 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4627 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4628 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4629 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4630 4631 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4632 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4633 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4634 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4635 os::Solaris::set_cond_init(pthread_cond_default_init); 4636 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4637 } 4638 else { 4639 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4640 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4641 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4642 os::Solaris::set_mutex_init(::mutex_init); 4643 os::Solaris::set_mutex_destroy(::mutex_destroy); 4644 4645 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4646 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4647 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4648 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4649 os::Solaris::set_cond_init(::cond_init); 4650 os::Solaris::set_cond_destroy(::cond_destroy); 4651 } 4652 } 4653} 4654 4655bool os::Solaris::liblgrp_init() { 4656 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4657 if (handle != NULL) { 4658 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4659 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4660 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4661 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4662 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4663 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4664 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4665 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4666 dlsym(handle, "lgrp_cookie_stale"))); 4667 4668 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4669 set_lgrp_cookie(c); 4670 return true; 4671 } 4672 return false; 4673} 4674 4675void os::Solaris::misc_sym_init() { 4676 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4677 if(func == NULL) { 4678 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4679 } 4680 if (func != NULL) { 4681 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4682 } 4683} 4684 4685// Symbol doesn't exist in Solaris 8 pset.h 4686#ifndef PS_MYID 4687#define PS_MYID -3 4688#endif 4689 4690// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4691typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4692static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4693 4694void init_pset_getloadavg_ptr(void) { 4695 pset_getloadavg_ptr = 4696 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4697 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4698 warning("pset_getloadavg function not found"); 4699 } 4700} 4701 4702int os::Solaris::_dev_zero_fd = -1; 4703 4704// this is called _before_ the global arguments have been parsed 4705void os::init(void) { 4706 _initial_pid = getpid(); 4707 4708 max_hrtime = first_hrtime = gethrtime(); 4709 4710 init_random(1234567); 4711 4712 page_size = sysconf(_SC_PAGESIZE); 4713 if (page_size == -1) 4714 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4715 init_page_sizes((size_t) page_size); 4716 4717 Solaris::initialize_system_info(); 4718 4719 int fd = open("/dev/zero", O_RDWR); 4720 if (fd < 0) { 4721 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4722 } else { 4723 Solaris::set_dev_zero_fd(fd); 4724 4725 // Close on exec, child won't inherit. 4726 fcntl(fd, F_SETFD, FD_CLOEXEC); 4727 } 4728 4729 clock_tics_per_sec = CLK_TCK; 4730 4731 // check if dladdr1() exists; dladdr1 can provide more information than 4732 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4733 // and is available on linker patches for 5.7 and 5.8. 4734 // libdl.so must have been loaded, this call is just an entry lookup 4735 void * hdl = dlopen("libdl.so", RTLD_NOW); 4736 if (hdl) 4737 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4738 4739 // (Solaris only) this switches to calls that actually do locking. 4740 ThreadCritical::initialize(); 4741 4742 main_thread = thr_self(); 4743 4744 // Constant minimum stack size allowed. It must be at least 4745 // the minimum of what the OS supports (thr_min_stack()), and 4746 // enough to allow the thread to get to user bytecode execution. 4747 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4748 // If the pagesize of the VM is greater than 8K determine the appropriate 4749 // number of initial guard pages. The user can change this with the 4750 // command line arguments, if needed. 4751 if (vm_page_size() > 8*K) { 4752 StackYellowPages = 1; 4753 StackRedPages = 1; 4754 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4755 } 4756} 4757 4758// To install functions for atexit system call 4759extern "C" { 4760 static void perfMemory_exit_helper() { 4761 perfMemory_exit(); 4762 } 4763} 4764 4765// this is called _after_ the global arguments have been parsed 4766jint os::init_2(void) { 4767 // try to enable extended file IO ASAP, see 6431278 4768 os::Solaris::try_enable_extended_io(); 4769 4770 // Allocate a single page and mark it as readable for safepoint polling. Also 4771 // use this first mmap call to check support for MAP_ALIGN. 4772 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4773 page_size, 4774 MAP_PRIVATE | MAP_ALIGN, 4775 PROT_READ); 4776 if (polling_page == NULL) { 4777 has_map_align = false; 4778 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4779 PROT_READ); 4780 } 4781 4782 os::set_polling_page(polling_page); 4783 4784#ifndef PRODUCT 4785 if( Verbose && PrintMiscellaneous ) 4786 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4787#endif 4788 4789 if (!UseMembar) { 4790 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4791 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4792 os::set_memory_serialize_page( mem_serialize_page ); 4793 4794#ifndef PRODUCT 4795 if(Verbose && PrintMiscellaneous) 4796 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4797#endif 4798} 4799 4800 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4801 4802 // Check minimum allowable stack size for thread creation and to initialize 4803 // the java system classes, including StackOverflowError - depends on page 4804 // size. Add a page for compiler2 recursion in main thread. 4805 // Add in BytesPerWord times page size to account for VM stack during 4806 // class initialization depending on 32 or 64 bit VM. 4807 guarantee((Solaris::min_stack_allowed >= 4808 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4809 COMPILER2_PRESENT(+1)) * page_size), 4810 "need to increase Solaris::min_stack_allowed on this platform"); 4811 4812 size_t threadStackSizeInBytes = ThreadStackSize * K; 4813 if (threadStackSizeInBytes != 0 && 4814 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4815 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4816 Solaris::min_stack_allowed/K); 4817 return JNI_ERR; 4818 } 4819 4820 // For 64kbps there will be a 64kb page size, which makes 4821 // the usable default stack size quite a bit less. Increase the 4822 // stack for 64kb (or any > than 8kb) pages, this increases 4823 // virtual memory fragmentation (since we're not creating the 4824 // stack on a power of 2 boundary. The real fix for this 4825 // should be to fix the guard page mechanism. 4826 4827 if (vm_page_size() > 8*K) { 4828 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4829 ? threadStackSizeInBytes + 4830 ((StackYellowPages + StackRedPages) * vm_page_size()) 4831 : 0; 4832 ThreadStackSize = threadStackSizeInBytes/K; 4833 } 4834 4835 // Make the stack size a multiple of the page size so that 4836 // the yellow/red zones can be guarded. 4837 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4838 vm_page_size())); 4839 4840 Solaris::libthread_init(); 4841 4842 if (UseNUMA) { 4843 if (!Solaris::liblgrp_init()) { 4844 UseNUMA = false; 4845 } else { 4846 size_t lgrp_limit = os::numa_get_groups_num(); 4847 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); 4848 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4849 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4850 if (lgrp_num < 2) { 4851 // There's only one locality group, disable NUMA. 4852 UseNUMA = false; 4853 } 4854 } 4855 if (!UseNUMA && ForceNUMA) { 4856 UseNUMA = true; 4857 } 4858 } 4859 4860 Solaris::misc_sym_init(); 4861 Solaris::signal_sets_init(); 4862 Solaris::init_signal_mem(); 4863 Solaris::install_signal_handlers(); 4864 4865 if (libjsigversion < JSIG_VERSION_1_4_1) { 4866 Maxlibjsigsigs = OLDMAXSIGNUM; 4867 } 4868 4869 // initialize synchronization primitives to use either thread or 4870 // lwp synchronization (controlled by UseLWPSynchronization) 4871 Solaris::synchronization_init(); 4872 4873 if (MaxFDLimit) { 4874 // set the number of file descriptors to max. print out error 4875 // if getrlimit/setrlimit fails but continue regardless. 4876 struct rlimit nbr_files; 4877 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4878 if (status != 0) { 4879 if (PrintMiscellaneous && (Verbose || WizardMode)) 4880 perror("os::init_2 getrlimit failed"); 4881 } else { 4882 nbr_files.rlim_cur = nbr_files.rlim_max; 4883 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4884 if (status != 0) { 4885 if (PrintMiscellaneous && (Verbose || WizardMode)) 4886 perror("os::init_2 setrlimit failed"); 4887 } 4888 } 4889 } 4890 4891 // Initialize HPI. 4892 jint hpi_result = hpi::initialize(); 4893 if (hpi_result != JNI_OK) { 4894 tty->print_cr("There was an error trying to initialize the HPI library."); 4895 return hpi_result; 4896 } 4897 4898 // Calculate theoretical max. size of Threads to guard gainst 4899 // artifical out-of-memory situations, where all available address- 4900 // space has been reserved by thread stacks. Default stack size is 1Mb. 4901 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4902 JavaThread::stack_size_at_create() : (1*K*K); 4903 assert(pre_thread_stack_size != 0, "Must have a stack"); 4904 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4905 // we should start doing Virtual Memory banging. Currently when the threads will 4906 // have used all but 200Mb of space. 4907 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4908 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4909 4910 // at-exit methods are called in the reverse order of their registration. 4911 // In Solaris 7 and earlier, atexit functions are called on return from 4912 // main or as a result of a call to exit(3C). There can be only 32 of 4913 // these functions registered and atexit() does not set errno. In Solaris 4914 // 8 and later, there is no limit to the number of functions registered 4915 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4916 // functions are called upon dlclose(3DL) in addition to return from main 4917 // and exit(3C). 4918 4919 if (PerfAllowAtExitRegistration) { 4920 // only register atexit functions if PerfAllowAtExitRegistration is set. 4921 // atexit functions can be delayed until process exit time, which 4922 // can be problematic for embedded VM situations. Embedded VMs should 4923 // call DestroyJavaVM() to assure that VM resources are released. 4924 4925 // note: perfMemory_exit_helper atexit function may be removed in 4926 // the future if the appropriate cleanup code can be added to the 4927 // VM_Exit VMOperation's doit method. 4928 if (atexit(perfMemory_exit_helper) != 0) { 4929 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4930 } 4931 } 4932 4933 // Init pset_loadavg function pointer 4934 init_pset_getloadavg_ptr(); 4935 4936 return JNI_OK; 4937} 4938 4939 4940// Mark the polling page as unreadable 4941void os::make_polling_page_unreadable(void) { 4942 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4943 fatal("Could not disable polling page"); 4944}; 4945 4946// Mark the polling page as readable 4947void os::make_polling_page_readable(void) { 4948 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4949 fatal("Could not enable polling page"); 4950}; 4951 4952// OS interface. 4953 4954int os::stat(const char *path, struct stat *sbuf) { 4955 char pathbuf[MAX_PATH]; 4956 if (strlen(path) > MAX_PATH - 1) { 4957 errno = ENAMETOOLONG; 4958 return -1; 4959 } 4960 hpi::native_path(strcpy(pathbuf, path)); 4961 return ::stat(pathbuf, sbuf); 4962} 4963 4964 4965bool os::check_heap(bool force) { return true; } 4966 4967typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4968static vsnprintf_t sol_vsnprintf = NULL; 4969 4970int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4971 if (!sol_vsnprintf) { 4972 //search for the named symbol in the objects that were loaded after libjvm 4973 void* where = RTLD_NEXT; 4974 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4975 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4976 if (!sol_vsnprintf){ 4977 //search for the named symbol in the objects that were loaded before libjvm 4978 where = RTLD_DEFAULT; 4979 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4980 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4981 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4982 } 4983 } 4984 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4985} 4986 4987 4988// Is a (classpath) directory empty? 4989bool os::dir_is_empty(const char* path) { 4990 DIR *dir = NULL; 4991 struct dirent *ptr; 4992 4993 dir = opendir(path); 4994 if (dir == NULL) return true; 4995 4996 /* Scan the directory */ 4997 bool result = true; 4998 char buf[sizeof(struct dirent) + MAX_PATH]; 4999 struct dirent *dbuf = (struct dirent *) buf; 5000 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 5001 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 5002 result = false; 5003 } 5004 } 5005 closedir(dir); 5006 return result; 5007} 5008 5009// create binary file, rewriting existing file if required 5010int os::create_binary_file(const char* path, bool rewrite_existing) { 5011 int oflags = O_WRONLY | O_CREAT; 5012 if (!rewrite_existing) { 5013 oflags |= O_EXCL; 5014 } 5015 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5016} 5017 5018// return current position of file pointer 5019jlong os::current_file_offset(int fd) { 5020 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5021} 5022 5023// move file pointer to the specified offset 5024jlong os::seek_to_file_offset(int fd, jlong offset) { 5025 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5026} 5027 5028// Map a block of memory. 5029char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5030 char *addr, size_t bytes, bool read_only, 5031 bool allow_exec) { 5032 int prot; 5033 int flags; 5034 5035 if (read_only) { 5036 prot = PROT_READ; 5037 flags = MAP_SHARED; 5038 } else { 5039 prot = PROT_READ | PROT_WRITE; 5040 flags = MAP_PRIVATE; 5041 } 5042 5043 if (allow_exec) { 5044 prot |= PROT_EXEC; 5045 } 5046 5047 if (addr != NULL) { 5048 flags |= MAP_FIXED; 5049 } 5050 5051 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5052 fd, file_offset); 5053 if (mapped_address == MAP_FAILED) { 5054 return NULL; 5055 } 5056 return mapped_address; 5057} 5058 5059 5060// Remap a block of memory. 5061char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5062 char *addr, size_t bytes, bool read_only, 5063 bool allow_exec) { 5064 // same as map_memory() on this OS 5065 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5066 allow_exec); 5067} 5068 5069 5070// Unmap a block of memory. 5071bool os::unmap_memory(char* addr, size_t bytes) { 5072 return munmap(addr, bytes) == 0; 5073} 5074 5075void os::pause() { 5076 char filename[MAX_PATH]; 5077 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5078 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5079 } else { 5080 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5081 } 5082 5083 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5084 if (fd != -1) { 5085 struct stat buf; 5086 close(fd); 5087 while (::stat(filename, &buf) == 0) { 5088 (void)::poll(NULL, 0, 100); 5089 } 5090 } else { 5091 jio_fprintf(stderr, 5092 "Could not open pause file '%s', continuing immediately.\n", filename); 5093 } 5094} 5095 5096#ifndef PRODUCT 5097#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5098// Turn this on if you need to trace synch operations. 5099// Set RECORD_SYNCH_LIMIT to a large-enough value, 5100// and call record_synch_enable and record_synch_disable 5101// around the computation of interest. 5102 5103void record_synch(char* name, bool returning); // defined below 5104 5105class RecordSynch { 5106 char* _name; 5107 public: 5108 RecordSynch(char* name) :_name(name) 5109 { record_synch(_name, false); } 5110 ~RecordSynch() { record_synch(_name, true); } 5111}; 5112 5113#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5114extern "C" ret name params { \ 5115 typedef ret name##_t params; \ 5116 static name##_t* implem = NULL; \ 5117 static int callcount = 0; \ 5118 if (implem == NULL) { \ 5119 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5120 if (implem == NULL) fatal(dlerror()); \ 5121 } \ 5122 ++callcount; \ 5123 RecordSynch _rs(#name); \ 5124 inner; \ 5125 return implem args; \ 5126} 5127// in dbx, examine callcounts this way: 5128// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5129 5130#define CHECK_POINTER_OK(p) \ 5131 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5132#define CHECK_MU \ 5133 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5134#define CHECK_CV \ 5135 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5136#define CHECK_P(p) \ 5137 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5138 5139#define CHECK_MUTEX(mutex_op) \ 5140CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5141 5142CHECK_MUTEX( mutex_lock) 5143CHECK_MUTEX( _mutex_lock) 5144CHECK_MUTEX( mutex_unlock) 5145CHECK_MUTEX(_mutex_unlock) 5146CHECK_MUTEX( mutex_trylock) 5147CHECK_MUTEX(_mutex_trylock) 5148 5149#define CHECK_COND(cond_op) \ 5150CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5151 5152CHECK_COND( cond_wait); 5153CHECK_COND(_cond_wait); 5154CHECK_COND(_cond_wait_cancel); 5155 5156#define CHECK_COND2(cond_op) \ 5157CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5158 5159CHECK_COND2( cond_timedwait); 5160CHECK_COND2(_cond_timedwait); 5161CHECK_COND2(_cond_timedwait_cancel); 5162 5163// do the _lwp_* versions too 5164#define mutex_t lwp_mutex_t 5165#define cond_t lwp_cond_t 5166CHECK_MUTEX( _lwp_mutex_lock) 5167CHECK_MUTEX( _lwp_mutex_unlock) 5168CHECK_MUTEX( _lwp_mutex_trylock) 5169CHECK_MUTEX( __lwp_mutex_lock) 5170CHECK_MUTEX( __lwp_mutex_unlock) 5171CHECK_MUTEX( __lwp_mutex_trylock) 5172CHECK_MUTEX(___lwp_mutex_lock) 5173CHECK_MUTEX(___lwp_mutex_unlock) 5174 5175CHECK_COND( _lwp_cond_wait); 5176CHECK_COND( __lwp_cond_wait); 5177CHECK_COND(___lwp_cond_wait); 5178 5179CHECK_COND2( _lwp_cond_timedwait); 5180CHECK_COND2( __lwp_cond_timedwait); 5181#undef mutex_t 5182#undef cond_t 5183 5184CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5185CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5186CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5187CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5188CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5189CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5190CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5191CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5192 5193 5194// recording machinery: 5195 5196enum { RECORD_SYNCH_LIMIT = 200 }; 5197char* record_synch_name[RECORD_SYNCH_LIMIT]; 5198void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5199bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5200thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5201int record_synch_count = 0; 5202bool record_synch_enabled = false; 5203 5204// in dbx, examine recorded data this way: 5205// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5206 5207void record_synch(char* name, bool returning) { 5208 if (record_synch_enabled) { 5209 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5210 record_synch_name[record_synch_count] = name; 5211 record_synch_returning[record_synch_count] = returning; 5212 record_synch_thread[record_synch_count] = thr_self(); 5213 record_synch_arg0ptr[record_synch_count] = &name; 5214 record_synch_count++; 5215 } 5216 // put more checking code here: 5217 // ... 5218 } 5219} 5220 5221void record_synch_enable() { 5222 // start collecting trace data, if not already doing so 5223 if (!record_synch_enabled) record_synch_count = 0; 5224 record_synch_enabled = true; 5225} 5226 5227void record_synch_disable() { 5228 // stop collecting trace data 5229 record_synch_enabled = false; 5230} 5231 5232#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5233#endif // PRODUCT 5234 5235const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5236const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5237 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5238 5239 5240// JVMTI & JVM monitoring and management support 5241// The thread_cpu_time() and current_thread_cpu_time() are only 5242// supported if is_thread_cpu_time_supported() returns true. 5243// They are not supported on Solaris T1. 5244 5245// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5246// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5247// of a thread. 5248// 5249// current_thread_cpu_time() and thread_cpu_time(Thread *) 5250// returns the fast estimate available on the platform. 5251 5252// hrtime_t gethrvtime() return value includes 5253// user time but does not include system time 5254jlong os::current_thread_cpu_time() { 5255 return (jlong) gethrvtime(); 5256} 5257 5258jlong os::thread_cpu_time(Thread *thread) { 5259 // return user level CPU time only to be consistent with 5260 // what current_thread_cpu_time returns. 5261 // thread_cpu_time_info() must be changed if this changes 5262 return os::thread_cpu_time(thread, false /* user time only */); 5263} 5264 5265jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5266 if (user_sys_cpu_time) { 5267 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5268 } else { 5269 return os::current_thread_cpu_time(); 5270 } 5271} 5272 5273jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5274 char proc_name[64]; 5275 int count; 5276 prusage_t prusage; 5277 jlong lwp_time; 5278 int fd; 5279 5280 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5281 getpid(), 5282 thread->osthread()->lwp_id()); 5283 fd = open(proc_name, O_RDONLY); 5284 if ( fd == -1 ) return -1; 5285 5286 do { 5287 count = pread(fd, 5288 (void *)&prusage.pr_utime, 5289 thr_time_size, 5290 thr_time_off); 5291 } while (count < 0 && errno == EINTR); 5292 close(fd); 5293 if ( count < 0 ) return -1; 5294 5295 if (user_sys_cpu_time) { 5296 // user + system CPU time 5297 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5298 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5299 (jlong)prusage.pr_stime.tv_nsec + 5300 (jlong)prusage.pr_utime.tv_nsec; 5301 } else { 5302 // user level CPU time only 5303 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5304 (jlong)prusage.pr_utime.tv_nsec; 5305 } 5306 5307 return(lwp_time); 5308} 5309 5310void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5311 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5312 info_ptr->may_skip_backward = false; // elapsed time not wall time 5313 info_ptr->may_skip_forward = false; // elapsed time not wall time 5314 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5315} 5316 5317void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5318 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5319 info_ptr->may_skip_backward = false; // elapsed time not wall time 5320 info_ptr->may_skip_forward = false; // elapsed time not wall time 5321 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5322} 5323 5324bool os::is_thread_cpu_time_supported() { 5325 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5326 return true; 5327 } else { 5328 return false; 5329 } 5330} 5331 5332// System loadavg support. Returns -1 if load average cannot be obtained. 5333// Return the load average for our processor set if the primitive exists 5334// (Solaris 9 and later). Otherwise just return system wide loadavg. 5335int os::loadavg(double loadavg[], int nelem) { 5336 if (pset_getloadavg_ptr != NULL) { 5337 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5338 } else { 5339 return ::getloadavg(loadavg, nelem); 5340 } 5341} 5342 5343//--------------------------------------------------------------------------------- 5344#ifndef PRODUCT 5345 5346static address same_page(address x, address y) { 5347 intptr_t page_bits = -os::vm_page_size(); 5348 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5349 return x; 5350 else if (x > y) 5351 return (address)(intptr_t(y) | ~page_bits) + 1; 5352 else 5353 return (address)(intptr_t(y) & page_bits); 5354} 5355 5356bool os::find(address addr) { 5357 Dl_info dlinfo; 5358 memset(&dlinfo, 0, sizeof(dlinfo)); 5359 if (dladdr(addr, &dlinfo)) { 5360#ifdef _LP64 5361 tty->print("0x%016lx: ", addr); 5362#else 5363 tty->print("0x%08x: ", addr); 5364#endif 5365 if (dlinfo.dli_sname != NULL) 5366 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5367 else if (dlinfo.dli_fname) 5368 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5369 else 5370 tty->print("<absolute address>"); 5371 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5372#ifdef _LP64 5373 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5374#else 5375 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5376#endif 5377 tty->cr(); 5378 5379 if (Verbose) { 5380 // decode some bytes around the PC 5381 address begin = same_page(addr-40, addr); 5382 address end = same_page(addr+40, addr); 5383 address lowest = (address) dlinfo.dli_sname; 5384 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5385 if (begin < lowest) begin = lowest; 5386 Dl_info dlinfo2; 5387 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5388 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5389 end = (address) dlinfo2.dli_saddr; 5390 Disassembler::decode(begin, end); 5391 } 5392 return true; 5393 } 5394 return false; 5395} 5396 5397#endif 5398 5399 5400// Following function has been added to support HotSparc's libjvm.so running 5401// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5402// src/solaris/hpi/native_threads in the EVM codebase. 5403// 5404// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5405// libraries and should thus be removed. We will leave it behind for a while 5406// until we no longer want to able to run on top of 1.3.0 Solaris production 5407// JDK. See 4341971. 5408 5409#define STACK_SLACK 0x800 5410 5411extern "C" { 5412 intptr_t sysThreadAvailableStackWithSlack() { 5413 stack_t st; 5414 intptr_t retval, stack_top; 5415 retval = thr_stksegment(&st); 5416 assert(retval == 0, "incorrect return value from thr_stksegment"); 5417 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5418 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5419 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5420 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5421 } 5422} 5423 5424// Just to get the Kernel build to link on solaris for testing. 5425 5426extern "C" { 5427class ASGCT_CallTrace; 5428void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5429 KERNEL_RETURN; 5430} 5431 5432 5433// ObjectMonitor park-unpark infrastructure ... 5434// 5435// We implement Solaris and Linux PlatformEvents with the 5436// obvious condvar-mutex-flag triple. 5437// Another alternative that works quite well is pipes: 5438// Each PlatformEvent consists of a pipe-pair. 5439// The thread associated with the PlatformEvent 5440// calls park(), which reads from the input end of the pipe. 5441// Unpark() writes into the other end of the pipe. 5442// The write-side of the pipe must be set NDELAY. 5443// Unfortunately pipes consume a large # of handles. 5444// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5445// Using pipes for the 1st few threads might be workable, however. 5446// 5447// park() is permitted to return spuriously. 5448// Callers of park() should wrap the call to park() in 5449// an appropriate loop. A litmus test for the correct 5450// usage of park is the following: if park() were modified 5451// to immediately return 0 your code should still work, 5452// albeit degenerating to a spin loop. 5453// 5454// An interesting optimization for park() is to use a trylock() 5455// to attempt to acquire the mutex. If the trylock() fails 5456// then we know that a concurrent unpark() operation is in-progress. 5457// in that case the park() code could simply set _count to 0 5458// and return immediately. The subsequent park() operation *might* 5459// return immediately. That's harmless as the caller of park() is 5460// expected to loop. By using trylock() we will have avoided a 5461// avoided a context switch caused by contention on the per-thread mutex. 5462// 5463// TODO-FIXME: 5464// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5465// objectmonitor implementation. 5466// 2. Collapse the JSR166 parker event, and the 5467// objectmonitor ParkEvent into a single "Event" construct. 5468// 3. In park() and unpark() add: 5469// assert (Thread::current() == AssociatedWith). 5470// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5471// 1-out-of-N park() operations will return immediately. 5472// 5473// _Event transitions in park() 5474// -1 => -1 : illegal 5475// 1 => 0 : pass - return immediately 5476// 0 => -1 : block 5477// 5478// _Event serves as a restricted-range semaphore. 5479// 5480// Another possible encoding of _Event would be with 5481// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5482// 5483// TODO-FIXME: add DTRACE probes for: 5484// 1. Tx parks 5485// 2. Ty unparks Tx 5486// 3. Tx resumes from park 5487 5488 5489// value determined through experimentation 5490#define ROUNDINGFIX 11 5491 5492// utility to compute the abstime argument to timedwait. 5493// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5494 5495static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5496 // millis is the relative timeout time 5497 // abstime will be the absolute timeout time 5498 if (millis < 0) millis = 0; 5499 struct timeval now; 5500 int status = gettimeofday(&now, NULL); 5501 assert(status == 0, "gettimeofday"); 5502 jlong seconds = millis / 1000; 5503 jlong max_wait_period; 5504 5505 if (UseLWPSynchronization) { 5506 // forward port of fix for 4275818 (not sleeping long enough) 5507 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5508 // _lwp_cond_timedwait() used a round_down algorithm rather 5509 // than a round_up. For millis less than our roundfactor 5510 // it rounded down to 0 which doesn't meet the spec. 5511 // For millis > roundfactor we may return a bit sooner, but 5512 // since we can not accurately identify the patch level and 5513 // this has already been fixed in Solaris 9 and 8 we will 5514 // leave it alone rather than always rounding down. 5515 5516 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5517 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5518 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5519 max_wait_period = 21000000; 5520 } else { 5521 max_wait_period = 50000000; 5522 } 5523 millis %= 1000; 5524 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5525 seconds = max_wait_period; 5526 } 5527 abstime->tv_sec = now.tv_sec + seconds; 5528 long usec = now.tv_usec + millis * 1000; 5529 if (usec >= 1000000) { 5530 abstime->tv_sec += 1; 5531 usec -= 1000000; 5532 } 5533 abstime->tv_nsec = usec * 1000; 5534 return abstime; 5535} 5536 5537// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5538// Conceptually TryPark() should be equivalent to park(0). 5539 5540int os::PlatformEvent::TryPark() { 5541 for (;;) { 5542 const int v = _Event ; 5543 guarantee ((v == 0) || (v == 1), "invariant") ; 5544 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5545 } 5546} 5547 5548void os::PlatformEvent::park() { // AKA: down() 5549 // Invariant: Only the thread associated with the Event/PlatformEvent 5550 // may call park(). 5551 int v ; 5552 for (;;) { 5553 v = _Event ; 5554 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5555 } 5556 guarantee (v >= 0, "invariant") ; 5557 if (v == 0) { 5558 // Do this the hard way by blocking ... 5559 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5560 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5561 // Only for SPARC >= V8PlusA 5562#if defined(__sparc) && defined(COMPILER2) 5563 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5564#endif 5565 int status = os::Solaris::mutex_lock(_mutex); 5566 assert_status(status == 0, status, "mutex_lock"); 5567 guarantee (_nParked == 0, "invariant") ; 5568 ++ _nParked ; 5569 while (_Event < 0) { 5570 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5571 // Treat this the same as if the wait was interrupted 5572 // With usr/lib/lwp going to kernel, always handle ETIME 5573 status = os::Solaris::cond_wait(_cond, _mutex); 5574 if (status == ETIME) status = EINTR ; 5575 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5576 } 5577 -- _nParked ; 5578 _Event = 0 ; 5579 status = os::Solaris::mutex_unlock(_mutex); 5580 assert_status(status == 0, status, "mutex_unlock"); 5581 } 5582} 5583 5584int os::PlatformEvent::park(jlong millis) { 5585 guarantee (_nParked == 0, "invariant") ; 5586 int v ; 5587 for (;;) { 5588 v = _Event ; 5589 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5590 } 5591 guarantee (v >= 0, "invariant") ; 5592 if (v != 0) return OS_OK ; 5593 5594 int ret = OS_TIMEOUT; 5595 timestruc_t abst; 5596 compute_abstime (&abst, millis); 5597 5598 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5599 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5600 // Only for SPARC >= V8PlusA 5601#if defined(__sparc) && defined(COMPILER2) 5602 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5603#endif 5604 int status = os::Solaris::mutex_lock(_mutex); 5605 assert_status(status == 0, status, "mutex_lock"); 5606 guarantee (_nParked == 0, "invariant") ; 5607 ++ _nParked ; 5608 while (_Event < 0) { 5609 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5610 assert_status(status == 0 || status == EINTR || 5611 status == ETIME || status == ETIMEDOUT, 5612 status, "cond_timedwait"); 5613 if (!FilterSpuriousWakeups) break ; // previous semantics 5614 if (status == ETIME || status == ETIMEDOUT) break ; 5615 // We consume and ignore EINTR and spurious wakeups. 5616 } 5617 -- _nParked ; 5618 if (_Event >= 0) ret = OS_OK ; 5619 _Event = 0 ; 5620 status = os::Solaris::mutex_unlock(_mutex); 5621 assert_status(status == 0, status, "mutex_unlock"); 5622 return ret; 5623} 5624 5625void os::PlatformEvent::unpark() { 5626 int v, AnyWaiters; 5627 5628 // Increment _Event. 5629 // Another acceptable implementation would be to simply swap 1 5630 // into _Event: 5631 // if (Swap (&_Event, 1) < 0) { 5632 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5633 // if (AnyWaiters) cond_signal (_cond) ; 5634 // } 5635 5636 for (;;) { 5637 v = _Event ; 5638 if (v > 0) { 5639 // The LD of _Event could have reordered or be satisfied 5640 // by a read-aside from this processor's write buffer. 5641 // To avoid problems execute a barrier and then 5642 // ratify the value. A degenerate CAS() would also work. 5643 // Viz., CAS (v+0, &_Event, v) == v). 5644 OrderAccess::fence() ; 5645 if (_Event == v) return ; 5646 continue ; 5647 } 5648 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5649 } 5650 5651 // If the thread associated with the event was parked, wake it. 5652 if (v < 0) { 5653 int status ; 5654 // Wait for the thread assoc with the PlatformEvent to vacate. 5655 status = os::Solaris::mutex_lock(_mutex); 5656 assert_status(status == 0, status, "mutex_lock"); 5657 AnyWaiters = _nParked ; 5658 status = os::Solaris::mutex_unlock(_mutex); 5659 assert_status(status == 0, status, "mutex_unlock"); 5660 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5661 if (AnyWaiters != 0) { 5662 // We intentional signal *after* dropping the lock 5663 // to avoid a common class of futile wakeups. 5664 status = os::Solaris::cond_signal(_cond); 5665 assert_status(status == 0, status, "cond_signal"); 5666 } 5667 } 5668} 5669 5670// JSR166 5671// ------------------------------------------------------- 5672 5673/* 5674 * The solaris and linux implementations of park/unpark are fairly 5675 * conservative for now, but can be improved. They currently use a 5676 * mutex/condvar pair, plus _counter. 5677 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5678 * sets count to 1 and signals condvar. Only one thread ever waits 5679 * on the condvar. Contention seen when trying to park implies that someone 5680 * is unparking you, so don't wait. And spurious returns are fine, so there 5681 * is no need to track notifications. 5682 */ 5683 5684#define NANOSECS_PER_SEC 1000000000 5685#define NANOSECS_PER_MILLISEC 1000000 5686#define MAX_SECS 100000000 5687 5688/* 5689 * This code is common to linux and solaris and will be moved to a 5690 * common place in dolphin. 5691 * 5692 * The passed in time value is either a relative time in nanoseconds 5693 * or an absolute time in milliseconds. Either way it has to be unpacked 5694 * into suitable seconds and nanoseconds components and stored in the 5695 * given timespec structure. 5696 * Given time is a 64-bit value and the time_t used in the timespec is only 5697 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5698 * overflow if times way in the future are given. Further on Solaris versions 5699 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5700 * number of seconds, in abstime, is less than current_time + 100,000,000. 5701 * As it will be 28 years before "now + 100000000" will overflow we can 5702 * ignore overflow and just impose a hard-limit on seconds using the value 5703 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5704 * years from "now". 5705 */ 5706static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5707 assert (time > 0, "convertTime"); 5708 5709 struct timeval now; 5710 int status = gettimeofday(&now, NULL); 5711 assert(status == 0, "gettimeofday"); 5712 5713 time_t max_secs = now.tv_sec + MAX_SECS; 5714 5715 if (isAbsolute) { 5716 jlong secs = time / 1000; 5717 if (secs > max_secs) { 5718 absTime->tv_sec = max_secs; 5719 } 5720 else { 5721 absTime->tv_sec = secs; 5722 } 5723 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5724 } 5725 else { 5726 jlong secs = time / NANOSECS_PER_SEC; 5727 if (secs >= MAX_SECS) { 5728 absTime->tv_sec = max_secs; 5729 absTime->tv_nsec = 0; 5730 } 5731 else { 5732 absTime->tv_sec = now.tv_sec + secs; 5733 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5734 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5735 absTime->tv_nsec -= NANOSECS_PER_SEC; 5736 ++absTime->tv_sec; // note: this must be <= max_secs 5737 } 5738 } 5739 } 5740 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5741 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5742 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5743 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5744} 5745 5746void Parker::park(bool isAbsolute, jlong time) { 5747 5748 // Optional fast-path check: 5749 // Return immediately if a permit is available. 5750 if (_counter > 0) { 5751 _counter = 0 ; 5752 return ; 5753 } 5754 5755 // Optional fast-exit: Check interrupt before trying to wait 5756 Thread* thread = Thread::current(); 5757 assert(thread->is_Java_thread(), "Must be JavaThread"); 5758 JavaThread *jt = (JavaThread *)thread; 5759 if (Thread::is_interrupted(thread, false)) { 5760 return; 5761 } 5762 5763 // First, demultiplex/decode time arguments 5764 timespec absTime; 5765 if (time < 0) { // don't wait at all 5766 return; 5767 } 5768 if (time > 0) { 5769 // Warning: this code might be exposed to the old Solaris time 5770 // round-down bugs. Grep "roundingFix" for details. 5771 unpackTime(&absTime, isAbsolute, time); 5772 } 5773 5774 // Enter safepoint region 5775 // Beware of deadlocks such as 6317397. 5776 // The per-thread Parker:: _mutex is a classic leaf-lock. 5777 // In particular a thread must never block on the Threads_lock while 5778 // holding the Parker:: mutex. If safepoints are pending both the 5779 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5780 ThreadBlockInVM tbivm(jt); 5781 5782 // Don't wait if cannot get lock since interference arises from 5783 // unblocking. Also. check interrupt before trying wait 5784 if (Thread::is_interrupted(thread, false) || 5785 os::Solaris::mutex_trylock(_mutex) != 0) { 5786 return; 5787 } 5788 5789 int status ; 5790 5791 if (_counter > 0) { // no wait needed 5792 _counter = 0; 5793 status = os::Solaris::mutex_unlock(_mutex); 5794 assert (status == 0, "invariant") ; 5795 return; 5796 } 5797 5798#ifdef ASSERT 5799 // Don't catch signals while blocked; let the running threads have the signals. 5800 // (This allows a debugger to break into the running thread.) 5801 sigset_t oldsigs; 5802 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5803 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5804#endif 5805 5806 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5807 jt->set_suspend_equivalent(); 5808 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5809 5810 // Do this the hard way by blocking ... 5811 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5812 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5813 // Only for SPARC >= V8PlusA 5814#if defined(__sparc) && defined(COMPILER2) 5815 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5816#endif 5817 5818 if (time == 0) { 5819 status = os::Solaris::cond_wait (_cond, _mutex) ; 5820 } else { 5821 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5822 } 5823 // Note that an untimed cond_wait() can sometimes return ETIME on older 5824 // versions of the Solaris. 5825 assert_status(status == 0 || status == EINTR || 5826 status == ETIME || status == ETIMEDOUT, 5827 status, "cond_timedwait"); 5828 5829#ifdef ASSERT 5830 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5831#endif 5832 _counter = 0 ; 5833 status = os::Solaris::mutex_unlock(_mutex); 5834 assert_status(status == 0, status, "mutex_unlock") ; 5835 5836 // If externally suspended while waiting, re-suspend 5837 if (jt->handle_special_suspend_equivalent_condition()) { 5838 jt->java_suspend_self(); 5839 } 5840 5841} 5842 5843void Parker::unpark() { 5844 int s, status ; 5845 status = os::Solaris::mutex_lock (_mutex) ; 5846 assert (status == 0, "invariant") ; 5847 s = _counter; 5848 _counter = 1; 5849 status = os::Solaris::mutex_unlock (_mutex) ; 5850 assert (status == 0, "invariant") ; 5851 5852 if (s < 1) { 5853 status = os::Solaris::cond_signal (_cond) ; 5854 assert (status == 0, "invariant") ; 5855 } 5856} 5857 5858extern char** environ; 5859 5860// Run the specified command in a separate process. Return its exit value, 5861// or -1 on failure (e.g. can't fork a new process). 5862// Unlike system(), this function can be called from signal handler. It 5863// doesn't block SIGINT et al. 5864int os::fork_and_exec(char* cmd) { 5865 char * argv[4]; 5866 argv[0] = (char *)"sh"; 5867 argv[1] = (char *)"-c"; 5868 argv[2] = cmd; 5869 argv[3] = NULL; 5870 5871 // fork is async-safe, fork1 is not so can't use in signal handler 5872 pid_t pid; 5873 Thread* t = ThreadLocalStorage::get_thread_slow(); 5874 if (t != NULL && t->is_inside_signal_handler()) { 5875 pid = fork(); 5876 } else { 5877 pid = fork1(); 5878 } 5879 5880 if (pid < 0) { 5881 // fork failed 5882 warning("fork failed: %s", strerror(errno)); 5883 return -1; 5884 5885 } else if (pid == 0) { 5886 // child process 5887 5888 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5889 execve("/usr/bin/sh", argv, environ); 5890 5891 // execve failed 5892 _exit(-1); 5893 5894 } else { 5895 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5896 // care about the actual exit code, for now. 5897 5898 int status; 5899 5900 // Wait for the child process to exit. This returns immediately if 5901 // the child has already exited. */ 5902 while (waitpid(pid, &status, 0) < 0) { 5903 switch (errno) { 5904 case ECHILD: return 0; 5905 case EINTR: break; 5906 default: return -1; 5907 } 5908 } 5909 5910 if (WIFEXITED(status)) { 5911 // The child exited normally; get its exit code. 5912 return WEXITSTATUS(status); 5913 } else if (WIFSIGNALED(status)) { 5914 // The child exited because of a signal 5915 // The best value to return is 0x80 + signal number, 5916 // because that is what all Unix shells do, and because 5917 // it allows callers to distinguish between process exit and 5918 // process death by signal. 5919 return 0x80 + WTERMSIG(status); 5920 } else { 5921 // Unknown exit code; pass it through 5922 return status; 5923 } 5924 } 5925} 5926