os_solaris.cpp revision 462:85f1b9537f70
1/* 2 * Copyright 1997-2008 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} 325 326// interruptible infrastructure 327 328// setup_interruptible saves the thread state before going into an 329// interruptible system call. 330// The saved state is used to restore the thread to 331// its former state whether or not an interrupt is received. 332// Used by classloader os::read 333// hpi calls skip this layer and stay in _thread_in_native 334 335void os::Solaris::setup_interruptible(JavaThread* thread) { 336 337 JavaThreadState thread_state = thread->thread_state(); 338 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 341 OSThread* osthread = thread->osthread(); 342 osthread->set_saved_interrupt_thread_state(thread_state); 343 thread->frame_anchor()->make_walkable(thread); 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 345} 346 347// Version of setup_interruptible() for threads that are already in 348// _thread_blocked. Used by os_sleep(). 349void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 350 thread->frame_anchor()->make_walkable(thread); 351} 352 353JavaThread* os::Solaris::setup_interruptible() { 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 355 setup_interruptible(thread); 356 return thread; 357} 358 359void os::Solaris::try_enable_extended_io() { 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); 361 362 if (!UseExtendedFileIO) { 363 return; 364 } 365 366 enable_extended_FILE_stdio_t enabler = 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 368 "enable_extended_FILE_stdio"); 369 if (enabler) { 370 enabler(-1, -1); 371 } 372} 373 374 375#ifdef ASSERT 376 377JavaThread* os::Solaris::setup_interruptible_native() { 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 379 JavaThreadState thread_state = thread->thread_state(); 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 381 return thread; 382} 383 384void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 385 JavaThreadState thread_state = thread->thread_state(); 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 387} 388#endif 389 390// cleanup_interruptible reverses the effects of setup_interruptible 391// setup_interruptible_already_blocked() does not need any cleanup. 392 393void os::Solaris::cleanup_interruptible(JavaThread* thread) { 394 OSThread* osthread = thread->osthread(); 395 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 397} 398 399// I/O interruption related counters called in _INTERRUPTIBLE 400 401void os::Solaris::bump_interrupted_before_count() { 402 RuntimeService::record_interrupted_before_count(); 403} 404 405void os::Solaris::bump_interrupted_during_count() { 406 RuntimeService::record_interrupted_during_count(); 407} 408 409static int _processors_online = 0; 410 411 jint os::Solaris::_os_thread_limit = 0; 412volatile jint os::Solaris::_os_thread_count = 0; 413 414julong os::available_memory() { 415 return Solaris::available_memory(); 416} 417 418julong os::Solaris::available_memory() { 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 420} 421 422julong os::Solaris::_physical_memory = 0; 423 424julong os::physical_memory() { 425 return Solaris::physical_memory(); 426} 427 428julong os::allocatable_physical_memory(julong size) { 429#ifdef _LP64 430 return size; 431#else 432 julong result = MIN2(size, (julong)3835*M); 433 if (!is_allocatable(result)) { 434 // Memory allocations will be aligned but the alignment 435 // is not known at this point. Alignments will 436 // be at most to LargePageSizeInBytes. Protect 437 // allocations from alignments up to illegal 438 // values. If at this point 2G is illegal. 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 440 result = MIN2(size, reasonable_size); 441 } 442 return result; 443#endif 444} 445 446static hrtime_t first_hrtime = 0; 447static const hrtime_t hrtime_hz = 1000*1000*1000; 448const int LOCK_BUSY = 1; 449const int LOCK_FREE = 0; 450const int LOCK_INVALID = -1; 451static volatile hrtime_t max_hrtime = 0; 452static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 453 454 455void os::Solaris::initialize_system_info() { 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 459} 460 461int os::active_processor_count() { 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 463 pid_t pid = getpid(); 464 psetid_t pset = PS_NONE; 465 // Are we running in a processor set or is there any processor set around? 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 467 uint_t pset_cpus; 468 // Query the number of cpus available to us. 469 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 470 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 471 _processors_online = pset_cpus; 472 return pset_cpus; 473 } 474 } 475 // Otherwise return number of online cpus 476 return online_cpus; 477} 478 479static bool find_processors_in_pset(psetid_t pset, 480 processorid_t** id_array, 481 uint_t* id_length) { 482 bool result = false; 483 // Find the number of processors in the processor set. 484 if (pset_info(pset, NULL, id_length, NULL) == 0) { 485 // Make up an array to hold their ids. 486 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 487 // Fill in the array with their processor ids. 488 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 489 result = true; 490 } 491 } 492 return result; 493} 494 495// Callers of find_processors_online() must tolerate imprecise results -- 496// the system configuration can change asynchronously because of DR 497// or explicit psradm operations. 498// 499// We also need to take care that the loop (below) terminates as the 500// number of processors online can change between the _SC_NPROCESSORS_ONLN 501// request and the loop that builds the list of processor ids. Unfortunately 502// there's no reliable way to determine the maximum valid processor id, 503// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 504// man pages, which claim the processor id set is "sparse, but 505// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 506// exit the loop. 507// 508// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 509// not available on S8.0. 510 511static bool find_processors_online(processorid_t** id_array, 512 uint* id_length) { 513 const processorid_t MAX_PROCESSOR_ID = 100000 ; 514 // Find the number of processors online. 515 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 516 // Make up an array to hold their ids. 517 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 518 // Processors need not be numbered consecutively. 519 long found = 0; 520 processorid_t next = 0; 521 while (found < *id_length && next < MAX_PROCESSOR_ID) { 522 processor_info_t info; 523 if (processor_info(next, &info) == 0) { 524 // NB, PI_NOINTR processors are effectively online ... 525 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 526 (*id_array)[found] = next; 527 found += 1; 528 } 529 } 530 next += 1; 531 } 532 if (found < *id_length) { 533 // The loop above didn't identify the expected number of processors. 534 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 535 // and re-running the loop, above, but there's no guarantee of progress 536 // if the system configuration is in flux. Instead, we just return what 537 // we've got. Note that in the worst case find_processors_online() could 538 // return an empty set. (As a fall-back in the case of the empty set we 539 // could just return the ID of the current processor). 540 *id_length = found ; 541 } 542 543 return true; 544} 545 546static bool assign_distribution(processorid_t* id_array, 547 uint id_length, 548 uint* distribution, 549 uint distribution_length) { 550 // We assume we can assign processorid_t's to uint's. 551 assert(sizeof(processorid_t) == sizeof(uint), 552 "can't convert processorid_t to uint"); 553 // Quick check to see if we won't succeed. 554 if (id_length < distribution_length) { 555 return false; 556 } 557 // Assign processor ids to the distribution. 558 // Try to shuffle processors to distribute work across boards, 559 // assuming 4 processors per board. 560 const uint processors_per_board = ProcessDistributionStride; 561 // Find the maximum processor id. 562 processorid_t max_id = 0; 563 for (uint m = 0; m < id_length; m += 1) { 564 max_id = MAX2(max_id, id_array[m]); 565 } 566 // The next id, to limit loops. 567 const processorid_t limit_id = max_id + 1; 568 // Make up markers for available processors. 569 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 570 for (uint c = 0; c < limit_id; c += 1) { 571 available_id[c] = false; 572 } 573 for (uint a = 0; a < id_length; a += 1) { 574 available_id[id_array[a]] = true; 575 } 576 // Step by "boards", then by "slot", copying to "assigned". 577 // NEEDS_CLEANUP: The assignment of processors should be stateful, 578 // remembering which processors have been assigned by 579 // previous calls, etc., so as to distribute several 580 // independent calls of this method. What we'd like is 581 // It would be nice to have an API that let us ask 582 // how many processes are bound to a processor, 583 // but we don't have that, either. 584 // In the short term, "board" is static so that 585 // subsequent distributions don't all start at board 0. 586 static uint board = 0; 587 uint assigned = 0; 588 // Until we've found enough processors .... 589 while (assigned < distribution_length) { 590 // ... find the next available processor in the board. 591 for (uint slot = 0; slot < processors_per_board; slot += 1) { 592 uint try_id = board * processors_per_board + slot; 593 if ((try_id < limit_id) && (available_id[try_id] == true)) { 594 distribution[assigned] = try_id; 595 available_id[try_id] = false; 596 assigned += 1; 597 break; 598 } 599 } 600 board += 1; 601 if (board * processors_per_board + 0 >= limit_id) { 602 board = 0; 603 } 604 } 605 if (available_id != NULL) { 606 FREE_C_HEAP_ARRAY(bool, available_id); 607 } 608 return true; 609} 610 611bool os::distribute_processes(uint length, uint* distribution) { 612 bool result = false; 613 // Find the processor id's of all the available CPUs. 614 processorid_t* id_array = NULL; 615 uint id_length = 0; 616 // There are some races between querying information and using it, 617 // since processor sets can change dynamically. 618 psetid_t pset = PS_NONE; 619 // Are we running in a processor set? 620 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 621 result = find_processors_in_pset(pset, &id_array, &id_length); 622 } else { 623 result = find_processors_online(&id_array, &id_length); 624 } 625 if (result == true) { 626 if (id_length >= length) { 627 result = assign_distribution(id_array, id_length, distribution, length); 628 } else { 629 result = false; 630 } 631 } 632 if (id_array != NULL) { 633 FREE_C_HEAP_ARRAY(processorid_t, id_array); 634 } 635 return result; 636} 637 638bool os::bind_to_processor(uint processor_id) { 639 // We assume that a processorid_t can be stored in a uint. 640 assert(sizeof(uint) == sizeof(processorid_t), 641 "can't convert uint to processorid_t"); 642 int bind_result = 643 processor_bind(P_LWPID, // bind LWP. 644 P_MYID, // bind current LWP. 645 (processorid_t) processor_id, // id. 646 NULL); // don't return old binding. 647 return (bind_result == 0); 648} 649 650bool os::getenv(const char* name, char* buffer, int len) { 651 char* val = ::getenv( name ); 652 if ( val == NULL 653 || strlen(val) + 1 > len ) { 654 if (len > 0) buffer[0] = 0; // return a null string 655 return false; 656 } 657 strcpy( buffer, val ); 658 return true; 659} 660 661 662// Return true if user is running as root. 663 664bool os::have_special_privileges() { 665 static bool init = false; 666 static bool privileges = false; 667 if (!init) { 668 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 669 init = true; 670 } 671 return privileges; 672} 673 674 675static char* get_property(char* name, char* buffer, int buffer_size) { 676 if (os::getenv(name, buffer, buffer_size)) { 677 return buffer; 678 } 679 static char empty[] = ""; 680 return empty; 681} 682 683 684void os::init_system_properties_values() { 685 char arch[12]; 686 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 687 688 // The next steps are taken in the product version: 689 // 690 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 691 // This library should be located at: 692 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 693 // 694 // If "/jre/lib/" appears at the right place in the path, then we 695 // assume libjvm[_g].so is installed in a JDK and we use this path. 696 // 697 // Otherwise exit with message: "Could not create the Java virtual machine." 698 // 699 // The following extra steps are taken in the debugging version: 700 // 701 // If "/jre/lib/" does NOT appear at the right place in the path 702 // instead of exit check for $JAVA_HOME environment variable. 703 // 704 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 705 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 706 // it looks like libjvm[_g].so is installed there 707 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 708 // 709 // Otherwise exit. 710 // 711 // Important note: if the location of libjvm.so changes this 712 // code needs to be changed accordingly. 713 714 // The next few definitions allow the code to be verbatim: 715#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 716#define free(p) FREE_C_HEAP_ARRAY(char, p) 717#define getenv(n) ::getenv(n) 718 719#define EXTENSIONS_DIR "/lib/ext" 720#define ENDORSED_DIR "/lib/endorsed" 721#define COMMON_DIR "/usr/jdk/packages" 722 723 { 724 /* sysclasspath, java_home, dll_dir */ 725 { 726 char *home_path; 727 char *dll_path; 728 char *pslash; 729 char buf[MAXPATHLEN]; 730 os::jvm_path(buf, sizeof(buf)); 731 732 // Found the full path to libjvm.so. 733 // Now cut the path to <java_home>/jre if we can. 734 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 735 pslash = strrchr(buf, '/'); 736 if (pslash != NULL) 737 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 738 dll_path = malloc(strlen(buf) + 1); 739 if (dll_path == NULL) 740 return; 741 strcpy(dll_path, buf); 742 Arguments::set_dll_dir(dll_path); 743 744 if (pslash != NULL) { 745 pslash = strrchr(buf, '/'); 746 if (pslash != NULL) { 747 *pslash = '\0'; /* get rid of /<arch> */ 748 pslash = strrchr(buf, '/'); 749 if (pslash != NULL) 750 *pslash = '\0'; /* get rid of /lib */ 751 } 752 } 753 754 home_path = malloc(strlen(buf) + 1); 755 if (home_path == NULL) 756 return; 757 strcpy(home_path, buf); 758 Arguments::set_java_home(home_path); 759 760 if (!set_boot_path('/', ':')) 761 return; 762 } 763 764 /* 765 * Where to look for native libraries 766 */ 767 { 768 // Use dlinfo() to determine the correct java.library.path. 769 // 770 // If we're launched by the Java launcher, and the user 771 // does not set java.library.path explicitly on the commandline, 772 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 773 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 774 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 775 // /usr/lib), which is exactly what we want. 776 // 777 // If the user does set java.library.path, it completely 778 // overwrites this setting, and always has. 779 // 780 // If we're not launched by the Java launcher, we may 781 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 782 // settings. Again, dlinfo does exactly what we want. 783 784 Dl_serinfo _info, *info = &_info; 785 Dl_serpath *path; 786 char* library_path; 787 char *common_path; 788 int i; 789 790 // determine search path count and required buffer size 791 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 792 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 793 } 794 795 // allocate new buffer and initialize 796 info = (Dl_serinfo*)malloc(_info.dls_size); 797 if (info == NULL) { 798 vm_exit_out_of_memory(_info.dls_size, 799 "init_system_properties_values info"); 800 } 801 info->dls_size = _info.dls_size; 802 info->dls_cnt = _info.dls_cnt; 803 804 // obtain search path information 805 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 806 free(info); 807 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 808 } 809 810 path = &info->dls_serpath[0]; 811 812 // Note: Due to a legacy implementation, most of the library path 813 // is set in the launcher. This was to accomodate linking restrictions 814 // on legacy Solaris implementations (which are no longer supported). 815 // Eventually, all the library path setting will be done here. 816 // 817 // However, to prevent the proliferation of improperly built native 818 // libraries, the new path component /usr/jdk/packages is added here. 819 820 // Determine the actual CPU architecture. 821 char cpu_arch[12]; 822 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 823#ifdef _LP64 824 // If we are a 64-bit vm, perform the following translations: 825 // sparc -> sparcv9 826 // i386 -> amd64 827 if (strcmp(cpu_arch, "sparc") == 0) 828 strcat(cpu_arch, "v9"); 829 else if (strcmp(cpu_arch, "i386") == 0) 830 strcpy(cpu_arch, "amd64"); 831#endif 832 833 // Construct the invariant part of ld_library_path. Note that the 834 // space for the colon and the trailing null are provided by the 835 // nulls included by the sizeof operator. 836 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 837 common_path = malloc(bufsize); 838 if (common_path == NULL) { 839 free(info); 840 vm_exit_out_of_memory(bufsize, 841 "init_system_properties_values common_path"); 842 } 843 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 844 845 // struct size is more than sufficient for the path components obtained 846 // through the dlinfo() call, so only add additional space for the path 847 // components explicitly added here. 848 bufsize = info->dls_size + strlen(common_path); 849 library_path = malloc(bufsize); 850 if (library_path == NULL) { 851 free(info); 852 free(common_path); 853 vm_exit_out_of_memory(bufsize, 854 "init_system_properties_values library_path"); 855 } 856 library_path[0] = '\0'; 857 858 // Construct the desired Java library path from the linker's library 859 // search path. 860 // 861 // For compatibility, it is optimal that we insert the additional path 862 // components specific to the Java VM after those components specified 863 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 864 // infrastructure. 865 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 866 strcpy(library_path, common_path); 867 } else { 868 int inserted = 0; 869 for (i = 0; i < info->dls_cnt; i++, path++) { 870 uint_t flags = path->dls_flags & LA_SER_MASK; 871 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 872 strcat(library_path, common_path); 873 strcat(library_path, os::path_separator()); 874 inserted = 1; 875 } 876 strcat(library_path, path->dls_name); 877 strcat(library_path, os::path_separator()); 878 } 879 // eliminate trailing path separator 880 library_path[strlen(library_path)-1] = '\0'; 881 } 882 883 // happens before argument parsing - can't use a trace flag 884 // tty->print_raw("init_system_properties_values: native lib path: "); 885 // tty->print_raw_cr(library_path); 886 887 // callee copies into its own buffer 888 Arguments::set_library_path(library_path); 889 890 free(common_path); 891 free(library_path); 892 free(info); 893 } 894 895 /* 896 * Extensions directories. 897 * 898 * Note that the space for the colon and the trailing null are provided 899 * by the nulls included by the sizeof operator (so actually one byte more 900 * than necessary is allocated). 901 */ 902 { 903 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 904 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 905 sizeof(EXTENSIONS_DIR)); 906 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 907 Arguments::get_java_home()); 908 Arguments::set_ext_dirs(buf); 909 } 910 911 /* Endorsed standards default directory. */ 912 { 913 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 914 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 915 Arguments::set_endorsed_dirs(buf); 916 } 917 } 918 919#undef malloc 920#undef free 921#undef getenv 922#undef EXTENSIONS_DIR 923#undef ENDORSED_DIR 924#undef COMMON_DIR 925 926} 927 928void os::breakpoint() { 929 BREAKPOINT; 930} 931 932bool os::obsolete_option(const JavaVMOption *option) 933{ 934 if (!strncmp(option->optionString, "-Xt", 3)) { 935 return true; 936 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 937 return true; 938 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 941 return true; 942 } 943 return false; 944} 945 946bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 947 address stackStart = (address)thread->stack_base(); 948 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 949 if (sp < stackStart && sp >= stackEnd ) return true; 950 return false; 951} 952 953extern "C" void breakpoint() { 954 // use debugger to set breakpoint here 955} 956 957// Returns an estimate of the current stack pointer. Result must be guaranteed to 958// point into the calling threads stack, and be no lower than the current stack 959// pointer. 960address os::current_stack_pointer() { 961 volatile int dummy; 962 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 963 return sp; 964} 965 966static thread_t main_thread; 967 968// Thread start routine for all new Java threads 969extern "C" void* java_start(void* thread_addr) { 970 // Try to randomize the cache line index of hot stack frames. 971 // This helps when threads of the same stack traces evict each other's 972 // cache lines. The threads can be either from the same JVM instance, or 973 // from different JVM instances. The benefit is especially true for 974 // processors with hyperthreading technology. 975 static int counter = 0; 976 int pid = os::current_process_id(); 977 alloca(((pid ^ counter++) & 7) * 128); 978 979 int prio; 980 Thread* thread = (Thread*)thread_addr; 981 OSThread* osthr = thread->osthread(); 982 983 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 984 thread->_schedctl = (void *) schedctl_init () ; 985 986 if (UseNUMA) { 987 int lgrp_id = os::numa_get_group_id(); 988 if (lgrp_id != -1) { 989 thread->set_lgrp_id(lgrp_id); 990 } 991 } 992 993 // If the creator called set priority before we started, 994 // we need to call set priority now that we have an lwp. 995 // Get the priority from libthread and set the priority 996 // for the new Solaris lwp. 997 if ( osthr->thread_id() != -1 ) { 998 if ( UseThreadPriorities ) { 999 thr_getprio(osthr->thread_id(), &prio); 1000 if (ThreadPriorityVerbose) { 1001 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1002 osthr->thread_id(), osthr->lwp_id(), prio ); 1003 } 1004 os::set_native_priority(thread, prio); 1005 } 1006 } else if (ThreadPriorityVerbose) { 1007 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1008 } 1009 1010 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1011 1012 // initialize signal mask for this thread 1013 os::Solaris::hotspot_sigmask(thread); 1014 1015 thread->run(); 1016 1017 // One less thread is executing 1018 // When the VMThread gets here, the main thread may have already exited 1019 // which frees the CodeHeap containing the Atomic::dec code 1020 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1021 Atomic::dec(&os::Solaris::_os_thread_count); 1022 } 1023 1024 if (UseDetachedThreads) { 1025 thr_exit(NULL); 1026 ShouldNotReachHere(); 1027 } 1028 return NULL; 1029} 1030 1031static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1032 // Allocate the OSThread object 1033 OSThread* osthread = new OSThread(NULL, NULL); 1034 if (osthread == NULL) return NULL; 1035 1036 // Store info on the Solaris thread into the OSThread 1037 osthread->set_thread_id(thread_id); 1038 osthread->set_lwp_id(_lwp_self()); 1039 thread->_schedctl = (void *) schedctl_init () ; 1040 1041 if (UseNUMA) { 1042 int lgrp_id = os::numa_get_group_id(); 1043 if (lgrp_id != -1) { 1044 thread->set_lgrp_id(lgrp_id); 1045 } 1046 } 1047 1048 if ( ThreadPriorityVerbose ) { 1049 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1050 osthread->thread_id(), osthread->lwp_id() ); 1051 } 1052 1053 // Initial thread state is INITIALIZED, not SUSPENDED 1054 osthread->set_state(INITIALIZED); 1055 1056 return osthread; 1057} 1058 1059void os::Solaris::hotspot_sigmask(Thread* thread) { 1060 1061 //Save caller's signal mask 1062 sigset_t sigmask; 1063 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1064 OSThread *osthread = thread->osthread(); 1065 osthread->set_caller_sigmask(sigmask); 1066 1067 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1068 if (!ReduceSignalUsage) { 1069 if (thread->is_VM_thread()) { 1070 // Only the VM thread handles BREAK_SIGNAL ... 1071 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1072 } else { 1073 // ... all other threads block BREAK_SIGNAL 1074 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1075 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1076 } 1077 } 1078} 1079 1080bool os::create_attached_thread(JavaThread* thread) { 1081#ifdef ASSERT 1082 thread->verify_not_published(); 1083#endif 1084 OSThread* osthread = create_os_thread(thread, thr_self()); 1085 if (osthread == NULL) { 1086 return false; 1087 } 1088 1089 // Initial thread state is RUNNABLE 1090 osthread->set_state(RUNNABLE); 1091 thread->set_osthread(osthread); 1092 1093 // initialize signal mask for this thread 1094 // and save the caller's signal mask 1095 os::Solaris::hotspot_sigmask(thread); 1096 1097 return true; 1098} 1099 1100bool os::create_main_thread(JavaThread* thread) { 1101#ifdef ASSERT 1102 thread->verify_not_published(); 1103#endif 1104 if (_starting_thread == NULL) { 1105 _starting_thread = create_os_thread(thread, main_thread); 1106 if (_starting_thread == NULL) { 1107 return false; 1108 } 1109 } 1110 1111 // The primodial thread is runnable from the start 1112 _starting_thread->set_state(RUNNABLE); 1113 1114 thread->set_osthread(_starting_thread); 1115 1116 // initialize signal mask for this thread 1117 // and save the caller's signal mask 1118 os::Solaris::hotspot_sigmask(thread); 1119 1120 return true; 1121} 1122 1123// _T2_libthread is true if we believe we are running with the newer 1124// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1125bool os::Solaris::_T2_libthread = false; 1126 1127bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1128 // Allocate the OSThread object 1129 OSThread* osthread = new OSThread(NULL, NULL); 1130 if (osthread == NULL) { 1131 return false; 1132 } 1133 1134 if ( ThreadPriorityVerbose ) { 1135 char *thrtyp; 1136 switch ( thr_type ) { 1137 case vm_thread: 1138 thrtyp = (char *)"vm"; 1139 break; 1140 case cgc_thread: 1141 thrtyp = (char *)"cgc"; 1142 break; 1143 case pgc_thread: 1144 thrtyp = (char *)"pgc"; 1145 break; 1146 case java_thread: 1147 thrtyp = (char *)"java"; 1148 break; 1149 case compiler_thread: 1150 thrtyp = (char *)"compiler"; 1151 break; 1152 case watcher_thread: 1153 thrtyp = (char *)"watcher"; 1154 break; 1155 default: 1156 thrtyp = (char *)"unknown"; 1157 break; 1158 } 1159 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1160 } 1161 1162 // Calculate stack size if it's not specified by caller. 1163 if (stack_size == 0) { 1164 // The default stack size 1M (2M for LP64). 1165 stack_size = (BytesPerWord >> 2) * K * K; 1166 1167 switch (thr_type) { 1168 case os::java_thread: 1169 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1170 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1171 break; 1172 case os::compiler_thread: 1173 if (CompilerThreadStackSize > 0) { 1174 stack_size = (size_t)(CompilerThreadStackSize * K); 1175 break; 1176 } // else fall through: 1177 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1178 case os::vm_thread: 1179 case os::pgc_thread: 1180 case os::cgc_thread: 1181 case os::watcher_thread: 1182 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1183 break; 1184 } 1185 } 1186 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1187 1188 // Initial state is ALLOCATED but not INITIALIZED 1189 osthread->set_state(ALLOCATED); 1190 1191 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1192 // We got lots of threads. Check if we still have some address space left. 1193 // Need to be at least 5Mb of unreserved address space. We do check by 1194 // trying to reserve some. 1195 const size_t VirtualMemoryBangSize = 20*K*K; 1196 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1197 if (mem == NULL) { 1198 delete osthread; 1199 return false; 1200 } else { 1201 // Release the memory again 1202 os::release_memory(mem, VirtualMemoryBangSize); 1203 } 1204 } 1205 1206 // Setup osthread because the child thread may need it. 1207 thread->set_osthread(osthread); 1208 1209 // Create the Solaris thread 1210 // explicit THR_BOUND for T2_libthread case in case 1211 // that assumption is not accurate, but our alternate signal stack 1212 // handling is based on it which must have bound threads 1213 thread_t tid = 0; 1214 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1215 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1216 (thr_type == vm_thread) || 1217 (thr_type == cgc_thread) || 1218 (thr_type == pgc_thread) || 1219 (thr_type == compiler_thread && BackgroundCompilation)) ? 1220 THR_BOUND : 0); 1221 int status; 1222 1223 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1224 // 1225 // On multiprocessors systems, libthread sometimes under-provisions our 1226 // process with LWPs. On a 30-way systems, for instance, we could have 1227 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1228 // to our process. This can result in under utilization of PEs. 1229 // I suspect the problem is related to libthread's LWP 1230 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1231 // upcall policy. 1232 // 1233 // The following code is palliative -- it attempts to ensure that our 1234 // process has sufficient LWPs to take advantage of multiple PEs. 1235 // Proper long-term cures include using user-level threads bound to LWPs 1236 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1237 // slight timing window with respect to sampling _os_thread_count, but 1238 // the race is benign. Also, we should periodically recompute 1239 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1240 // the number of PEs in our partition. You might be tempted to use 1241 // THR_NEW_LWP here, but I'd recommend against it as that could 1242 // result in undesirable growth of the libthread's LWP pool. 1243 // The fix below isn't sufficient; for instance, it doesn't take into count 1244 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1245 // 1246 // Some pathologies this scheme doesn't handle: 1247 // * Threads can block, releasing the LWPs. The LWPs can age out. 1248 // When a large number of threads become ready again there aren't 1249 // enough LWPs available to service them. This can occur when the 1250 // number of ready threads oscillates. 1251 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1252 // 1253 // Finally, we should call thr_setconcurrency() periodically to refresh 1254 // the LWP pool and thwart the LWP age-out mechanism. 1255 // The "+3" term provides a little slop -- we want to slightly overprovision. 1256 1257 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1258 if (!(flags & THR_BOUND)) { 1259 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1260 } 1261 } 1262 // Although this doesn't hurt, we should warn of undefined behavior 1263 // when using unbound T1 threads with schedctl(). This should never 1264 // happen, as the compiler and VM threads are always created bound 1265 DEBUG_ONLY( 1266 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1267 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1268 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1269 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1270 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1271 } 1272 ); 1273 1274 1275 // Mark that we don't have an lwp or thread id yet. 1276 // In case we attempt to set the priority before the thread starts. 1277 osthread->set_lwp_id(-1); 1278 osthread->set_thread_id(-1); 1279 1280 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1281 if (status != 0) { 1282 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1283 perror("os::create_thread"); 1284 } 1285 thread->set_osthread(NULL); 1286 // Need to clean up stuff we've allocated so far 1287 delete osthread; 1288 return false; 1289 } 1290 1291 Atomic::inc(&os::Solaris::_os_thread_count); 1292 1293 // Store info on the Solaris thread into the OSThread 1294 osthread->set_thread_id(tid); 1295 1296 // Remember that we created this thread so we can set priority on it 1297 osthread->set_vm_created(); 1298 1299 // Set the default thread priority otherwise use NormalPriority 1300 1301 if ( UseThreadPriorities ) { 1302 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1303 java_to_os_priority[NormPriority] : 1304 DefaultThreadPriority); 1305 } 1306 1307 // Initial thread state is INITIALIZED, not SUSPENDED 1308 osthread->set_state(INITIALIZED); 1309 1310 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1311 return true; 1312} 1313 1314/* defined for >= Solaris 10. This allows builds on earlier versions 1315 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1316 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1317 * and -XX:+UseAltSigs does nothing since these should have no conflict 1318 */ 1319#if !defined(SIGJVM1) 1320#define SIGJVM1 39 1321#define SIGJVM2 40 1322#endif 1323 1324debug_only(static bool signal_sets_initialized = false); 1325static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1326int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1327int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1328 1329bool os::Solaris::is_sig_ignored(int sig) { 1330 struct sigaction oact; 1331 sigaction(sig, (struct sigaction*)NULL, &oact); 1332 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1333 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1334 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1335 return true; 1336 else 1337 return false; 1338} 1339 1340// Note: SIGRTMIN is a macro that calls sysconf() so it will 1341// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1342static bool isJVM1available() { 1343 return SIGJVM1 < SIGRTMIN; 1344} 1345 1346void os::Solaris::signal_sets_init() { 1347 // Should also have an assertion stating we are still single-threaded. 1348 assert(!signal_sets_initialized, "Already initialized"); 1349 // Fill in signals that are necessarily unblocked for all threads in 1350 // the VM. Currently, we unblock the following signals: 1351 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1352 // by -Xrs (=ReduceSignalUsage)); 1353 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1354 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1355 // the dispositions or masks wrt these signals. 1356 // Programs embedding the VM that want to use the above signals for their 1357 // own purposes must, at this time, use the "-Xrs" option to prevent 1358 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1359 // (See bug 4345157, and other related bugs). 1360 // In reality, though, unblocking these signals is really a nop, since 1361 // these signals are not blocked by default. 1362 sigemptyset(&unblocked_sigs); 1363 sigemptyset(&allowdebug_blocked_sigs); 1364 sigaddset(&unblocked_sigs, SIGILL); 1365 sigaddset(&unblocked_sigs, SIGSEGV); 1366 sigaddset(&unblocked_sigs, SIGBUS); 1367 sigaddset(&unblocked_sigs, SIGFPE); 1368 1369 if (isJVM1available) { 1370 os::Solaris::set_SIGinterrupt(SIGJVM1); 1371 os::Solaris::set_SIGasync(SIGJVM2); 1372 } else if (UseAltSigs) { 1373 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1374 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1375 } else { 1376 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1377 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1378 } 1379 1380 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1381 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1382 1383 if (!ReduceSignalUsage) { 1384 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1385 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1386 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1387 } 1388 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1389 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1390 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1391 } 1392 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1393 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1394 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1395 } 1396 } 1397 // Fill in signals that are blocked by all but the VM thread. 1398 sigemptyset(&vm_sigs); 1399 if (!ReduceSignalUsage) 1400 sigaddset(&vm_sigs, BREAK_SIGNAL); 1401 debug_only(signal_sets_initialized = true); 1402 1403 // For diagnostics only used in run_periodic_checks 1404 sigemptyset(&check_signal_done); 1405} 1406 1407// These are signals that are unblocked while a thread is running Java. 1408// (For some reason, they get blocked by default.) 1409sigset_t* os::Solaris::unblocked_signals() { 1410 assert(signal_sets_initialized, "Not initialized"); 1411 return &unblocked_sigs; 1412} 1413 1414// These are the signals that are blocked while a (non-VM) thread is 1415// running Java. Only the VM thread handles these signals. 1416sigset_t* os::Solaris::vm_signals() { 1417 assert(signal_sets_initialized, "Not initialized"); 1418 return &vm_sigs; 1419} 1420 1421// These are signals that are blocked during cond_wait to allow debugger in 1422sigset_t* os::Solaris::allowdebug_blocked_signals() { 1423 assert(signal_sets_initialized, "Not initialized"); 1424 return &allowdebug_blocked_sigs; 1425} 1426 1427// First crack at OS-specific initialization, from inside the new thread. 1428void os::initialize_thread() { 1429 int r = thr_main() ; 1430 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1431 if (r) { 1432 JavaThread* jt = (JavaThread *)Thread::current(); 1433 assert(jt != NULL,"Sanity check"); 1434 size_t stack_size; 1435 address base = jt->stack_base(); 1436 if (Arguments::created_by_java_launcher()) { 1437 // Use 2MB to allow for Solaris 7 64 bit mode. 1438 stack_size = JavaThread::stack_size_at_create() == 0 1439 ? 2048*K : JavaThread::stack_size_at_create(); 1440 1441 // There are rare cases when we may have already used more than 1442 // the basic stack size allotment before this method is invoked. 1443 // Attempt to allow for a normally sized java_stack. 1444 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1445 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1446 } else { 1447 // 6269555: If we were not created by a Java launcher, i.e. if we are 1448 // running embedded in a native application, treat the primordial thread 1449 // as much like a native attached thread as possible. This means using 1450 // the current stack size from thr_stksegment(), unless it is too large 1451 // to reliably setup guard pages. A reasonable max size is 8MB. 1452 size_t current_size = current_stack_size(); 1453 // This should never happen, but just in case.... 1454 if (current_size == 0) current_size = 2 * K * K; 1455 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1456 } 1457 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1458 stack_size = (size_t)(base - bottom); 1459 1460 assert(stack_size > 0, "Stack size calculation problem"); 1461 1462 if (stack_size > jt->stack_size()) { 1463 NOT_PRODUCT( 1464 struct rlimit limits; 1465 getrlimit(RLIMIT_STACK, &limits); 1466 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1467 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1468 ) 1469 tty->print_cr( 1470 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1471 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1472 "See limit(1) to increase the stack size limit.", 1473 stack_size / K, jt->stack_size() / K); 1474 vm_exit(1); 1475 } 1476 assert(jt->stack_size() >= stack_size, 1477 "Attempt to map more stack than was allocated"); 1478 jt->set_stack_size(stack_size); 1479 } 1480 1481 // 5/22/01: Right now alternate signal stacks do not handle 1482 // throwing stack overflow exceptions, see bug 4463178 1483 // Until a fix is found for this, T2 will NOT imply alternate signal 1484 // stacks. 1485 // If using T2 libthread threads, install an alternate signal stack. 1486 // Because alternate stacks associate with LWPs on Solaris, 1487 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1488 // we prefer to explicitly stack bang. 1489 // If not using T2 libthread, but using UseBoundThreads any threads 1490 // (primordial thread, jni_attachCurrentThread) we do not create, 1491 // probably are not bound, therefore they can not have an alternate 1492 // signal stack. Since our stack banging code is generated and 1493 // is shared across threads, all threads must be bound to allow 1494 // using alternate signal stacks. The alternative is to interpose 1495 // on _lwp_create to associate an alt sig stack with each LWP, 1496 // and this could be a problem when the JVM is embedded. 1497 // We would prefer to use alternate signal stacks with T2 1498 // Since there is currently no accurate way to detect T2 1499 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1500 // on installing alternate signal stacks 1501 1502 1503 // 05/09/03: removed alternate signal stack support for Solaris 1504 // The alternate signal stack mechanism is no longer needed to 1505 // handle stack overflow. This is now handled by allocating 1506 // guard pages (red zone) and stackbanging. 1507 // Initially the alternate signal stack mechanism was removed because 1508 // it did not work with T1 llibthread. Alternate 1509 // signal stacks MUST have all threads bound to lwps. Applications 1510 // can create their own threads and attach them without their being 1511 // bound under T1. This is frequently the case for the primordial thread. 1512 // If we were ever to reenable this mechanism we would need to 1513 // use the dynamic check for T2 libthread. 1514 1515 os::Solaris::init_thread_fpu_state(); 1516} 1517 1518 1519 1520// Free Solaris resources related to the OSThread 1521void os::free_thread(OSThread* osthread) { 1522 assert(osthread != NULL, "os::free_thread but osthread not set"); 1523 1524 1525 // We are told to free resources of the argument thread, 1526 // but we can only really operate on the current thread. 1527 // The main thread must take the VMThread down synchronously 1528 // before the main thread exits and frees up CodeHeap 1529 guarantee((Thread::current()->osthread() == osthread 1530 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1531 if (Thread::current()->osthread() == osthread) { 1532 // Restore caller's signal mask 1533 sigset_t sigmask = osthread->caller_sigmask(); 1534 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1535 } 1536 delete osthread; 1537} 1538 1539void os::pd_start_thread(Thread* thread) { 1540 int status = thr_continue(thread->osthread()->thread_id()); 1541 assert_status(status == 0, status, "thr_continue failed"); 1542} 1543 1544 1545intx os::current_thread_id() { 1546 return (intx)thr_self(); 1547} 1548 1549static pid_t _initial_pid = 0; 1550 1551int os::current_process_id() { 1552 return (int)(_initial_pid ? _initial_pid : getpid()); 1553} 1554 1555int os::allocate_thread_local_storage() { 1556 // %%% in Win32 this allocates a memory segment pointed to by a 1557 // register. Dan Stein can implement a similar feature in 1558 // Solaris. Alternatively, the VM can do the same thing 1559 // explicitly: malloc some storage and keep the pointer in a 1560 // register (which is part of the thread's context) (or keep it 1561 // in TLS). 1562 // %%% In current versions of Solaris, thr_self and TSD can 1563 // be accessed via short sequences of displaced indirections. 1564 // The value of thr_self is available as %g7(36). 1565 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1566 // assuming that the current thread already has a value bound to k. 1567 // It may be worth experimenting with such access patterns, 1568 // and later having the parameters formally exported from a Solaris 1569 // interface. I think, however, that it will be faster to 1570 // maintain the invariant that %g2 always contains the 1571 // JavaThread in Java code, and have stubs simply 1572 // treat %g2 as a caller-save register, preserving it in a %lN. 1573 thread_key_t tk; 1574 if (thr_keycreate( &tk, NULL ) ) 1575 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1576 return int(tk); 1577} 1578 1579void os::free_thread_local_storage(int index) { 1580 // %%% don't think we need anything here 1581 // if ( pthread_key_delete((pthread_key_t) tk) ) 1582 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1583} 1584 1585#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1586 // small number - point is NO swap space available 1587void os::thread_local_storage_at_put(int index, void* value) { 1588 // %%% this is used only in threadLocalStorage.cpp 1589 if (thr_setspecific((thread_key_t)index, value)) { 1590 if (errno == ENOMEM) { 1591 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1592 } else { 1593 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1594 } 1595 } else { 1596 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1597 } 1598} 1599 1600// This function could be called before TLS is initialized, for example, when 1601// VM receives an async signal or when VM causes a fatal error during 1602// initialization. Return NULL if thr_getspecific() fails. 1603void* os::thread_local_storage_at(int index) { 1604 // %%% this is used only in threadLocalStorage.cpp 1605 void* r = NULL; 1606 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1607} 1608 1609 1610const int NANOSECS_PER_MILLISECS = 1000000; 1611// gethrtime can move backwards if read from one cpu and then a different cpu 1612// getTimeNanos is guaranteed to not move backward on Solaris 1613// local spinloop created as faster for a CAS on an int than 1614// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1615// supported on sparc v8 or pre supports_cx8 intel boxes. 1616// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1617// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1618inline hrtime_t oldgetTimeNanos() { 1619 int gotlock = LOCK_INVALID; 1620 hrtime_t newtime = gethrtime(); 1621 1622 for (;;) { 1623// grab lock for max_hrtime 1624 int curlock = max_hrtime_lock; 1625 if (curlock & LOCK_BUSY) continue; 1626 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1627 if (newtime > max_hrtime) { 1628 max_hrtime = newtime; 1629 } else { 1630 newtime = max_hrtime; 1631 } 1632 // release lock 1633 max_hrtime_lock = LOCK_FREE; 1634 return newtime; 1635 } 1636} 1637// gethrtime can move backwards if read from one cpu and then a different cpu 1638// getTimeNanos is guaranteed to not move backward on Solaris 1639inline hrtime_t getTimeNanos() { 1640 if (VM_Version::supports_cx8()) { 1641 bool retry = false; 1642 hrtime_t newtime = gethrtime(); 1643 hrtime_t oldmaxtime = max_hrtime; 1644 hrtime_t retmaxtime = oldmaxtime; 1645 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1646 oldmaxtime = retmaxtime; 1647 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1648 retry = true; 1649 } 1650 return (newtime > retmaxtime) ? newtime : retmaxtime; 1651 } else { 1652 return oldgetTimeNanos(); 1653 } 1654} 1655 1656// Time since start-up in seconds to a fine granularity. 1657// Used by VMSelfDestructTimer and the MemProfiler. 1658double os::elapsedTime() { 1659 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1660} 1661 1662jlong os::elapsed_counter() { 1663 return (jlong)(getTimeNanos() - first_hrtime); 1664} 1665 1666jlong os::elapsed_frequency() { 1667 return hrtime_hz; 1668} 1669 1670// Return the real, user, and system times in seconds from an 1671// arbitrary fixed point in the past. 1672bool os::getTimesSecs(double* process_real_time, 1673 double* process_user_time, 1674 double* process_system_time) { 1675 struct tms ticks; 1676 clock_t real_ticks = times(&ticks); 1677 1678 if (real_ticks == (clock_t) (-1)) { 1679 return false; 1680 } else { 1681 double ticks_per_second = (double) clock_tics_per_sec; 1682 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1683 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1684 // For consistency return the real time from getTimeNanos() 1685 // converted to seconds. 1686 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1687 1688 return true; 1689 } 1690} 1691 1692bool os::supports_vtime() { return true; } 1693 1694bool os::enable_vtime() { 1695 int fd = open("/proc/self/ctl", O_WRONLY); 1696 if (fd == -1) 1697 return false; 1698 1699 long cmd[] = { PCSET, PR_MSACCT }; 1700 int res = write(fd, cmd, sizeof(long) * 2); 1701 close(fd); 1702 if (res != sizeof(long) * 2) 1703 return false; 1704 1705 return true; 1706} 1707 1708bool os::vtime_enabled() { 1709 int fd = open("/proc/self/status", O_RDONLY); 1710 if (fd == -1) 1711 return false; 1712 1713 pstatus_t status; 1714 int res = read(fd, (void*) &status, sizeof(pstatus_t)); 1715 close(fd); 1716 if (res != sizeof(pstatus_t)) 1717 return false; 1718 1719 return status.pr_flags & PR_MSACCT; 1720} 1721 1722double os::elapsedVTime() { 1723 return (double)gethrvtime() / (double)hrtime_hz; 1724} 1725 1726// Used internally for comparisons only 1727// getTimeMillis guaranteed to not move backwards on Solaris 1728jlong getTimeMillis() { 1729 jlong nanotime = getTimeNanos(); 1730 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1731} 1732 1733// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1734jlong os::javaTimeMillis() { 1735 timeval t; 1736 if (gettimeofday( &t, NULL) == -1) 1737 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1738 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1739} 1740 1741jlong os::javaTimeNanos() { 1742 return (jlong)getTimeNanos(); 1743} 1744 1745void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1746 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1747 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1748 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1749 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1750} 1751 1752char * os::local_time_string(char *buf, size_t buflen) { 1753 struct tm t; 1754 time_t long_time; 1755 time(&long_time); 1756 localtime_r(&long_time, &t); 1757 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1758 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1759 t.tm_hour, t.tm_min, t.tm_sec); 1760 return buf; 1761} 1762 1763// Note: os::shutdown() might be called very early during initialization, or 1764// called from signal handler. Before adding something to os::shutdown(), make 1765// sure it is async-safe and can handle partially initialized VM. 1766void os::shutdown() { 1767 1768 // allow PerfMemory to attempt cleanup of any persistent resources 1769 perfMemory_exit(); 1770 1771 // needs to remove object in file system 1772 AttachListener::abort(); 1773 1774 // flush buffered output, finish log files 1775 ostream_abort(); 1776 1777 // Check for abort hook 1778 abort_hook_t abort_hook = Arguments::abort_hook(); 1779 if (abort_hook != NULL) { 1780 abort_hook(); 1781 } 1782} 1783 1784// Note: os::abort() might be called very early during initialization, or 1785// called from signal handler. Before adding something to os::abort(), make 1786// sure it is async-safe and can handle partially initialized VM. 1787void os::abort(bool dump_core) { 1788 os::shutdown(); 1789 if (dump_core) { 1790#ifndef PRODUCT 1791 fdStream out(defaultStream::output_fd()); 1792 out.print_raw("Current thread is "); 1793 char buf[16]; 1794 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1795 out.print_raw_cr(buf); 1796 out.print_raw_cr("Dumping core ..."); 1797#endif 1798 ::abort(); // dump core (for debugging) 1799 } 1800 1801 ::exit(1); 1802} 1803 1804// Die immediately, no exit hook, no abort hook, no cleanup. 1805void os::die() { 1806 _exit(-1); 1807} 1808 1809// unused 1810void os::set_error_file(const char *logfile) {} 1811 1812// DLL functions 1813 1814const char* os::dll_file_extension() { return ".so"; } 1815 1816const char* os::get_temp_directory() { return "/tmp/"; } 1817 1818void os::dll_build_name( 1819 char* buffer, size_t buflen, const char* pname, const char* fname) { 1820 // copied from libhpi 1821 const size_t pnamelen = pname ? strlen(pname) : 0; 1822 1823 /* Quietly truncate on buffer overflow. Should be an error. */ 1824 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1825 *buffer = '\0'; 1826 return; 1827 } 1828 1829 if (pnamelen == 0) { 1830 sprintf(buffer, "lib%s.so", fname); 1831 } else { 1832 sprintf(buffer, "%s/lib%s.so", pname, fname); 1833 } 1834} 1835 1836const char* os::get_current_directory(char *buf, int buflen) { 1837 return getcwd(buf, buflen); 1838} 1839 1840// check if addr is inside libjvm[_g].so 1841bool os::address_is_in_vm(address addr) { 1842 static address libjvm_base_addr; 1843 Dl_info dlinfo; 1844 1845 if (libjvm_base_addr == NULL) { 1846 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1847 libjvm_base_addr = (address)dlinfo.dli_fbase; 1848 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1849 } 1850 1851 if (dladdr((void *)addr, &dlinfo)) { 1852 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1853 } 1854 1855 return false; 1856} 1857 1858typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1859static dladdr1_func_type dladdr1_func = NULL; 1860 1861bool os::dll_address_to_function_name(address addr, char *buf, 1862 int buflen, int * offset) { 1863 Dl_info dlinfo; 1864 1865 // dladdr1_func was initialized in os::init() 1866 if (dladdr1_func){ 1867 // yes, we have dladdr1 1868 1869 // Support for dladdr1 is checked at runtime; it may be 1870 // available even if the vm is built on a machine that does 1871 // not have dladdr1 support. Make sure there is a value for 1872 // RTLD_DL_SYMENT. 1873 #ifndef RTLD_DL_SYMENT 1874 #define RTLD_DL_SYMENT 1 1875 #endif 1876 Sym * info; 1877 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1878 RTLD_DL_SYMENT)) { 1879 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1880 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1881 1882 // check if the returned symbol really covers addr 1883 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1884 } else { 1885 if (buf) buf[0] = '\0'; 1886 if (offset) *offset = -1; 1887 return false; 1888 } 1889 } else { 1890 // no, only dladdr is available 1891 if(dladdr((void *)addr, &dlinfo)) { 1892 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1893 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1894 return true; 1895 } else { 1896 if (buf) buf[0] = '\0'; 1897 if (offset) *offset = -1; 1898 return false; 1899 } 1900 } 1901} 1902 1903bool os::dll_address_to_library_name(address addr, char* buf, 1904 int buflen, int* offset) { 1905 Dl_info dlinfo; 1906 1907 if (dladdr((void*)addr, &dlinfo)){ 1908 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1909 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1910 return true; 1911 } else { 1912 if (buf) buf[0] = '\0'; 1913 if (offset) *offset = -1; 1914 return false; 1915 } 1916} 1917 1918// Prints the names and full paths of all opened dynamic libraries 1919// for current process 1920void os::print_dll_info(outputStream * st) { 1921 Dl_info dli; 1922 void *handle; 1923 Link_map *map; 1924 Link_map *p; 1925 1926 st->print_cr("Dynamic libraries:"); st->flush(); 1927 1928 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1929 st->print_cr("Error: Cannot print dynamic libraries."); 1930 return; 1931 } 1932 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1933 if (handle == NULL) { 1934 st->print_cr("Error: Cannot print dynamic libraries."); 1935 return; 1936 } 1937 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1938 if (map == NULL) { 1939 st->print_cr("Error: Cannot print dynamic libraries."); 1940 return; 1941 } 1942 1943 while (map->l_prev != NULL) 1944 map = map->l_prev; 1945 1946 while (map != NULL) { 1947 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1948 map = map->l_next; 1949 } 1950 1951 dlclose(handle); 1952} 1953 1954 // Loads .dll/.so and 1955 // in case of error it checks if .dll/.so was built for the 1956 // same architecture as Hotspot is running on 1957 1958void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1959{ 1960 void * result= ::dlopen(filename, RTLD_LAZY); 1961 if (result != NULL) { 1962 // Successful loading 1963 return result; 1964 } 1965 1966 Elf32_Ehdr elf_head; 1967 1968 // Read system error message into ebuf 1969 // It may or may not be overwritten below 1970 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1971 ebuf[ebuflen-1]='\0'; 1972 int diag_msg_max_length=ebuflen-strlen(ebuf); 1973 char* diag_msg_buf=ebuf+strlen(ebuf); 1974 1975 if (diag_msg_max_length==0) { 1976 // No more space in ebuf for additional diagnostics message 1977 return NULL; 1978 } 1979 1980 1981 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1982 1983 if (file_descriptor < 0) { 1984 // Can't open library, report dlerror() message 1985 return NULL; 1986 } 1987 1988 bool failed_to_read_elf_head= 1989 (sizeof(elf_head)!= 1990 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1991 1992 ::close(file_descriptor); 1993 if (failed_to_read_elf_head) { 1994 // file i/o error - report dlerror() msg 1995 return NULL; 1996 } 1997 1998 typedef struct { 1999 Elf32_Half code; // Actual value as defined in elf.h 2000 Elf32_Half compat_class; // Compatibility of archs at VM's sense 2001 char elf_class; // 32 or 64 bit 2002 char endianess; // MSB or LSB 2003 char* name; // String representation 2004 } arch_t; 2005 2006 static const arch_t arch_array[]={ 2007 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2008 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 2009 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 2010 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 2011 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2012 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 2013 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 2014 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 2015 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 2016 }; 2017 2018 #if (defined IA32) 2019 static Elf32_Half running_arch_code=EM_386; 2020 #elif (defined AMD64) 2021 static Elf32_Half running_arch_code=EM_X86_64; 2022 #elif (defined IA64) 2023 static Elf32_Half running_arch_code=EM_IA_64; 2024 #elif (defined __sparc) && (defined _LP64) 2025 static Elf32_Half running_arch_code=EM_SPARCV9; 2026 #elif (defined __sparc) && (!defined _LP64) 2027 static Elf32_Half running_arch_code=EM_SPARC; 2028 #elif (defined __powerpc64__) 2029 static Elf32_Half running_arch_code=EM_PPC64; 2030 #elif (defined __powerpc__) 2031 static Elf32_Half running_arch_code=EM_PPC; 2032 #else 2033 #error Method os::dll_load requires that one of following is defined:\ 2034 IA32, AMD64, IA64, __sparc, __powerpc__ 2035 #endif 2036 2037 // Identify compatability class for VM's architecture and library's architecture 2038 // Obtain string descriptions for architectures 2039 2040 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2041 int running_arch_index=-1; 2042 2043 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2044 if (running_arch_code == arch_array[i].code) { 2045 running_arch_index = i; 2046 } 2047 if (lib_arch.code == arch_array[i].code) { 2048 lib_arch.compat_class = arch_array[i].compat_class; 2049 lib_arch.name = arch_array[i].name; 2050 } 2051 } 2052 2053 assert(running_arch_index != -1, 2054 "Didn't find running architecture code (running_arch_code) in arch_array"); 2055 if (running_arch_index == -1) { 2056 // Even though running architecture detection failed 2057 // we may still continue with reporting dlerror() message 2058 return NULL; 2059 } 2060 2061 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2062 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2063 return NULL; 2064 } 2065 2066 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2067 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2068 return NULL; 2069 } 2070 2071 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2072 if ( lib_arch.name!=NULL ) { 2073 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2074 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2075 lib_arch.name, arch_array[running_arch_index].name); 2076 } else { 2077 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2078 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2079 lib_arch.code, 2080 arch_array[running_arch_index].name); 2081 } 2082 } 2083 2084 return NULL; 2085} 2086 2087void* os::dll_lookup(void* handle, const char* name) { 2088 return dlsym(handle, name); 2089} 2090 2091 2092bool _print_ascii_file(const char* filename, outputStream* st) { 2093 int fd = open(filename, O_RDONLY); 2094 if (fd == -1) { 2095 return false; 2096 } 2097 2098 char buf[32]; 2099 int bytes; 2100 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2101 st->print_raw(buf, bytes); 2102 } 2103 2104 close(fd); 2105 2106 return true; 2107} 2108 2109void os::print_os_info(outputStream* st) { 2110 st->print("OS:"); 2111 2112 if (!_print_ascii_file("/etc/release", st)) { 2113 st->print("Solaris"); 2114 } 2115 st->cr(); 2116 2117 // kernel 2118 st->print("uname:"); 2119 struct utsname name; 2120 uname(&name); 2121 st->print(name.sysname); st->print(" "); 2122 st->print(name.release); st->print(" "); 2123 st->print(name.version); st->print(" "); 2124 st->print(name.machine); 2125 2126 // libthread 2127 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2128 else st->print(" (T1 libthread)"); 2129 st->cr(); 2130 2131 // rlimit 2132 st->print("rlimit:"); 2133 struct rlimit rlim; 2134 2135 st->print(" STACK "); 2136 getrlimit(RLIMIT_STACK, &rlim); 2137 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2138 else st->print("%uk", rlim.rlim_cur >> 10); 2139 2140 st->print(", CORE "); 2141 getrlimit(RLIMIT_CORE, &rlim); 2142 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2143 else st->print("%uk", rlim.rlim_cur >> 10); 2144 2145 st->print(", NOFILE "); 2146 getrlimit(RLIMIT_NOFILE, &rlim); 2147 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2148 else st->print("%d", rlim.rlim_cur); 2149 2150 st->print(", AS "); 2151 getrlimit(RLIMIT_AS, &rlim); 2152 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2153 else st->print("%uk", rlim.rlim_cur >> 10); 2154 st->cr(); 2155 2156 // load average 2157 st->print("load average:"); 2158 double loadavg[3]; 2159 os::loadavg(loadavg, 3); 2160 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2161 st->cr(); 2162} 2163 2164 2165static bool check_addr0(outputStream* st) { 2166 jboolean status = false; 2167 int fd = open("/proc/self/map",O_RDONLY); 2168 if (fd >= 0) { 2169 prmap_t p; 2170 while(read(fd, &p, sizeof(p)) > 0) { 2171 if (p.pr_vaddr == 0x0) { 2172 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2173 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2174 st->print("Access:"); 2175 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2176 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2177 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2178 st->cr(); 2179 status = true; 2180 } 2181 close(fd); 2182 } 2183 } 2184 return status; 2185} 2186 2187void os::print_memory_info(outputStream* st) { 2188 st->print("Memory:"); 2189 st->print(" %dk page", os::vm_page_size()>>10); 2190 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2191 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2192 st->cr(); 2193 (void) check_addr0(st); 2194} 2195 2196// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2197// but they're the same for all the solaris architectures that we support. 2198const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2199 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2200 "ILL_COPROC", "ILL_BADSTK" }; 2201 2202const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2203 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2204 "FPE_FLTINV", "FPE_FLTSUB" }; 2205 2206const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2207 2208const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2209 2210void os::print_siginfo(outputStream* st, void* siginfo) { 2211 st->print("siginfo:"); 2212 2213 const int buflen = 100; 2214 char buf[buflen]; 2215 siginfo_t *si = (siginfo_t*)siginfo; 2216 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2217 char *err = strerror(si->si_errno); 2218 if (si->si_errno != 0 && err != NULL) { 2219 st->print("si_errno=%s", err); 2220 } else { 2221 st->print("si_errno=%d", si->si_errno); 2222 } 2223 const int c = si->si_code; 2224 assert(c > 0, "unexpected si_code"); 2225 switch (si->si_signo) { 2226 case SIGILL: 2227 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2228 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2229 break; 2230 case SIGFPE: 2231 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2232 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2233 break; 2234 case SIGSEGV: 2235 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2236 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2237 break; 2238 case SIGBUS: 2239 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2240 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2241 break; 2242 default: 2243 st->print(", si_code=%d", si->si_code); 2244 // no si_addr 2245 } 2246 2247 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2248 UseSharedSpaces) { 2249 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2250 if (mapinfo->is_in_shared_space(si->si_addr)) { 2251 st->print("\n\nError accessing class data sharing archive." \ 2252 " Mapped file inaccessible during execution, " \ 2253 " possible disk/network problem."); 2254 } 2255 } 2256 st->cr(); 2257} 2258 2259// Moved from whole group, because we need them here for diagnostic 2260// prints. 2261#define OLDMAXSIGNUM 32 2262static int Maxsignum = 0; 2263static int *ourSigFlags = NULL; 2264 2265extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2266 2267int os::Solaris::get_our_sigflags(int sig) { 2268 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2269 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2270 return ourSigFlags[sig]; 2271} 2272 2273void os::Solaris::set_our_sigflags(int sig, int flags) { 2274 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2275 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2276 ourSigFlags[sig] = flags; 2277} 2278 2279 2280static const char* get_signal_handler_name(address handler, 2281 char* buf, int buflen) { 2282 int offset; 2283 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2284 if (found) { 2285 // skip directory names 2286 const char *p1, *p2; 2287 p1 = buf; 2288 size_t len = strlen(os::file_separator()); 2289 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2290 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2291 } else { 2292 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2293 } 2294 return buf; 2295} 2296 2297static void print_signal_handler(outputStream* st, int sig, 2298 char* buf, size_t buflen) { 2299 struct sigaction sa; 2300 2301 sigaction(sig, NULL, &sa); 2302 2303 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2304 2305 address handler = (sa.sa_flags & SA_SIGINFO) 2306 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2307 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2308 2309 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2310 st->print("SIG_DFL"); 2311 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2312 st->print("SIG_IGN"); 2313 } else { 2314 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2315 } 2316 2317 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2318 2319 address rh = VMError::get_resetted_sighandler(sig); 2320 // May be, handler was resetted by VMError? 2321 if(rh != NULL) { 2322 handler = rh; 2323 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2324 } 2325 2326 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2327 2328 // Check: is it our handler? 2329 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2330 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2331 // It is our signal handler 2332 // check for flags 2333 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2334 st->print( 2335 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2336 os::Solaris::get_our_sigflags(sig)); 2337 } 2338 } 2339 st->cr(); 2340} 2341 2342void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2343 st->print_cr("Signal Handlers:"); 2344 print_signal_handler(st, SIGSEGV, buf, buflen); 2345 print_signal_handler(st, SIGBUS , buf, buflen); 2346 print_signal_handler(st, SIGFPE , buf, buflen); 2347 print_signal_handler(st, SIGPIPE, buf, buflen); 2348 print_signal_handler(st, SIGXFSZ, buf, buflen); 2349 print_signal_handler(st, SIGILL , buf, buflen); 2350 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2351 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2352 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2353 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2354 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2355 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2356 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2357 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2358} 2359 2360static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2361 2362// Find the full path to the current module, libjvm.so or libjvm_g.so 2363void os::jvm_path(char *buf, jint buflen) { 2364 // Error checking. 2365 if (buflen < MAXPATHLEN) { 2366 assert(false, "must use a large-enough buffer"); 2367 buf[0] = '\0'; 2368 return; 2369 } 2370 // Lazy resolve the path to current module. 2371 if (saved_jvm_path[0] != 0) { 2372 strcpy(buf, saved_jvm_path); 2373 return; 2374 } 2375 2376 Dl_info dlinfo; 2377 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2378 assert(ret != 0, "cannot locate libjvm"); 2379 realpath((char *)dlinfo.dli_fname, buf); 2380 2381 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2382 // Support for the gamma launcher. Typical value for buf is 2383 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2384 // the right place in the string, then assume we are installed in a JDK and 2385 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2386 // up the path so it looks like libjvm.so is installed there (append a 2387 // fake suffix hotspot/libjvm.so). 2388 const char *p = buf + strlen(buf) - 1; 2389 for (int count = 0; p > buf && count < 5; ++count) { 2390 for (--p; p > buf && *p != '/'; --p) 2391 /* empty */ ; 2392 } 2393 2394 if (strncmp(p, "/jre/lib/", 9) != 0) { 2395 // Look for JAVA_HOME in the environment. 2396 char* java_home_var = ::getenv("JAVA_HOME"); 2397 if (java_home_var != NULL && java_home_var[0] != 0) { 2398 char cpu_arch[12]; 2399 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2400#ifdef _LP64 2401 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2402 if (strcmp(cpu_arch, "sparc") == 0) { 2403 strcat(cpu_arch, "v9"); 2404 } else if (strcmp(cpu_arch, "i386") == 0) { 2405 strcpy(cpu_arch, "amd64"); 2406 } 2407#endif 2408 // Check the current module name "libjvm.so" or "libjvm_g.so". 2409 p = strrchr(buf, '/'); 2410 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2411 p = strstr(p, "_g") ? "_g" : ""; 2412 2413 realpath(java_home_var, buf); 2414 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2415 if (0 == access(buf, F_OK)) { 2416 // Use current module name "libjvm[_g].so" instead of 2417 // "libjvm"debug_only("_g")".so" since for fastdebug version 2418 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2419 // It is used when we are choosing the HPI library's name 2420 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2421 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2422 } else { 2423 // Go back to path of .so 2424 realpath((char *)dlinfo.dli_fname, buf); 2425 } 2426 } 2427 } 2428 } 2429 2430 strcpy(saved_jvm_path, buf); 2431} 2432 2433 2434void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2435 // no prefix required, not even "_" 2436} 2437 2438 2439void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2440 // no suffix required 2441} 2442 2443 2444// sun.misc.Signal 2445 2446extern "C" { 2447 static void UserHandler(int sig, void *siginfo, void *context) { 2448 // Ctrl-C is pressed during error reporting, likely because the error 2449 // handler fails to abort. Let VM die immediately. 2450 if (sig == SIGINT && is_error_reported()) { 2451 os::die(); 2452 } 2453 2454 os::signal_notify(sig); 2455 // We do not need to reinstate the signal handler each time... 2456 } 2457} 2458 2459void* os::user_handler() { 2460 return CAST_FROM_FN_PTR(void*, UserHandler); 2461} 2462 2463extern "C" { 2464 typedef void (*sa_handler_t)(int); 2465 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2466} 2467 2468void* os::signal(int signal_number, void* handler) { 2469 struct sigaction sigAct, oldSigAct; 2470 sigfillset(&(sigAct.sa_mask)); 2471 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2472 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2473 2474 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2475 // -1 means registration failed 2476 return (void *)-1; 2477 2478 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2479} 2480 2481void os::signal_raise(int signal_number) { 2482 raise(signal_number); 2483} 2484 2485/* 2486 * The following code is moved from os.cpp for making this 2487 * code platform specific, which it is by its very nature. 2488 */ 2489 2490// a counter for each possible signal value 2491static int Sigexit = 0; 2492static int Maxlibjsigsigs; 2493static jint *pending_signals = NULL; 2494static int *preinstalled_sigs = NULL; 2495static struct sigaction *chainedsigactions = NULL; 2496static sema_t sig_sem; 2497typedef int (*version_getting_t)(); 2498version_getting_t os::Solaris::get_libjsig_version = NULL; 2499static int libjsigversion = NULL; 2500 2501int os::sigexitnum_pd() { 2502 assert(Sigexit > 0, "signal memory not yet initialized"); 2503 return Sigexit; 2504} 2505 2506void os::Solaris::init_signal_mem() { 2507 // Initialize signal structures 2508 Maxsignum = SIGRTMAX; 2509 Sigexit = Maxsignum+1; 2510 assert(Maxsignum >0, "Unable to obtain max signal number"); 2511 2512 Maxlibjsigsigs = Maxsignum; 2513 2514 // pending_signals has one int per signal 2515 // The additional signal is for SIGEXIT - exit signal to signal_thread 2516 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2517 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2518 2519 if (UseSignalChaining) { 2520 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2521 * (Maxsignum + 1)); 2522 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2523 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2524 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2525 } 2526 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2527 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2528} 2529 2530void os::signal_init_pd() { 2531 int ret; 2532 2533 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2534 assert(ret == 0, "sema_init() failed"); 2535} 2536 2537void os::signal_notify(int signal_number) { 2538 int ret; 2539 2540 Atomic::inc(&pending_signals[signal_number]); 2541 ret = ::sema_post(&sig_sem); 2542 assert(ret == 0, "sema_post() failed"); 2543} 2544 2545static int check_pending_signals(bool wait_for_signal) { 2546 int ret; 2547 while (true) { 2548 for (int i = 0; i < Sigexit + 1; i++) { 2549 jint n = pending_signals[i]; 2550 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2551 return i; 2552 } 2553 } 2554 if (!wait_for_signal) { 2555 return -1; 2556 } 2557 JavaThread *thread = JavaThread::current(); 2558 ThreadBlockInVM tbivm(thread); 2559 2560 bool threadIsSuspended; 2561 do { 2562 thread->set_suspend_equivalent(); 2563 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2564 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2565 ; 2566 assert(ret == 0, "sema_wait() failed"); 2567 2568 // were we externally suspended while we were waiting? 2569 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2570 if (threadIsSuspended) { 2571 // 2572 // The semaphore has been incremented, but while we were waiting 2573 // another thread suspended us. We don't want to continue running 2574 // while suspended because that would surprise the thread that 2575 // suspended us. 2576 // 2577 ret = ::sema_post(&sig_sem); 2578 assert(ret == 0, "sema_post() failed"); 2579 2580 thread->java_suspend_self(); 2581 } 2582 } while (threadIsSuspended); 2583 } 2584} 2585 2586int os::signal_lookup() { 2587 return check_pending_signals(false); 2588} 2589 2590int os::signal_wait() { 2591 return check_pending_signals(true); 2592} 2593 2594//////////////////////////////////////////////////////////////////////////////// 2595// Virtual Memory 2596 2597static int page_size = -1; 2598 2599// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2600// clear this var if support is not available. 2601static bool has_map_align = true; 2602 2603int os::vm_page_size() { 2604 assert(page_size != -1, "must call os::init"); 2605 return page_size; 2606} 2607 2608// Solaris allocates memory by pages. 2609int os::vm_allocation_granularity() { 2610 assert(page_size != -1, "must call os::init"); 2611 return page_size; 2612} 2613 2614bool os::commit_memory(char* addr, size_t bytes) { 2615 size_t size = bytes; 2616 return 2617 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2618 PROT_READ | PROT_WRITE | PROT_EXEC); 2619} 2620 2621bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2622 if (commit_memory(addr, bytes)) { 2623 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2624 // If the large page size has been set and the VM 2625 // is using large pages, use the large page size 2626 // if it is smaller than the alignment hint. This is 2627 // a case where the VM wants to use a larger alignment size 2628 // for its own reasons but still want to use large pages 2629 // (which is what matters to setting the mpss range. 2630 size_t page_size = 0; 2631 if (large_page_size() < alignment_hint) { 2632 assert(UseLargePages, "Expected to be here for large page use only"); 2633 page_size = large_page_size(); 2634 } else { 2635 // If the alignment hint is less than the large page 2636 // size, the VM wants a particular alignment (thus the hint) 2637 // for internal reasons. Try to set the mpss range using 2638 // the alignment_hint. 2639 page_size = alignment_hint; 2640 } 2641 // Since this is a hint, ignore any failures. 2642 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2643 } 2644 return true; 2645 } 2646 return false; 2647} 2648 2649// Uncommit the pages in a specified region. 2650void os::free_memory(char* addr, size_t bytes) { 2651 if (madvise(addr, bytes, MADV_FREE) < 0) { 2652 debug_only(warning("MADV_FREE failed.")); 2653 return; 2654 } 2655} 2656 2657// Change the page size in a given range. 2658void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2659 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2660 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2661 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2662} 2663 2664// Tell the OS to make the range local to the first-touching LWP 2665void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2666 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2667 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2668 debug_only(warning("MADV_ACCESS_LWP failed.")); 2669 } 2670} 2671 2672// Tell the OS that this range would be accessed from different LWPs. 2673void os::numa_make_global(char *addr, size_t bytes) { 2674 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2675 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2676 debug_only(warning("MADV_ACCESS_MANY failed.")); 2677 } 2678} 2679 2680// Get the number of the locality groups. 2681size_t os::numa_get_groups_num() { 2682 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2683 return n != -1 ? n : 1; 2684} 2685 2686// Get a list of leaf locality groups. A leaf lgroup is group that 2687// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2688// board. An LWP is assigned to one of these groups upon creation. 2689size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2690 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2691 ids[0] = 0; 2692 return 1; 2693 } 2694 int result_size = 0, top = 1, bottom = 0, cur = 0; 2695 for (int k = 0; k < size; k++) { 2696 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2697 (Solaris::lgrp_id_t*)&ids[top], size - top); 2698 if (r == -1) { 2699 ids[0] = 0; 2700 return 1; 2701 } 2702 if (!r) { 2703 // That's a leaf node. 2704 assert (bottom <= cur, "Sanity check"); 2705 // Check if the node has memory 2706 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2707 NULL, 0, LGRP_RSRC_MEM) > 0) { 2708 ids[bottom++] = ids[cur]; 2709 } 2710 } 2711 top += r; 2712 cur++; 2713 } 2714 if (bottom == 0) { 2715 // Handle a situation, when the OS reports no memory available. 2716 // Assume UMA architecture. 2717 ids[0] = 0; 2718 return 1; 2719 } 2720 return bottom; 2721} 2722 2723// Detect the topology change. Typically happens during CPU plugging-unplugging. 2724bool os::numa_topology_changed() { 2725 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2726 if (is_stale != -1 && is_stale) { 2727 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2728 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2729 assert(c != 0, "Failure to initialize LGRP API"); 2730 Solaris::set_lgrp_cookie(c); 2731 return true; 2732 } 2733 return false; 2734} 2735 2736// Get the group id of the current LWP. 2737int os::numa_get_group_id() { 2738 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2739 if (lgrp_id == -1) { 2740 return 0; 2741 } 2742 const int size = os::numa_get_groups_num(); 2743 int *ids = (int*)alloca(size * sizeof(int)); 2744 2745 // Get the ids of all lgroups with memory; r is the count. 2746 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2747 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2748 if (r <= 0) { 2749 return 0; 2750 } 2751 return ids[os::random() % r]; 2752} 2753 2754// Request information about the page. 2755bool os::get_page_info(char *start, page_info* info) { 2756 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2757 uint64_t addr = (uintptr_t)start; 2758 uint64_t outdata[2]; 2759 uint_t validity = 0; 2760 2761 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2762 return false; 2763 } 2764 2765 info->size = 0; 2766 info->lgrp_id = -1; 2767 2768 if ((validity & 1) != 0) { 2769 if ((validity & 2) != 0) { 2770 info->lgrp_id = outdata[0]; 2771 } 2772 if ((validity & 4) != 0) { 2773 info->size = outdata[1]; 2774 } 2775 return true; 2776 } 2777 return false; 2778} 2779 2780// Scan the pages from start to end until a page different than 2781// the one described in the info parameter is encountered. 2782char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2783 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2784 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2785 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2786 uint_t validity[MAX_MEMINFO_CNT]; 2787 2788 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2789 uint64_t p = (uint64_t)start; 2790 while (p < (uint64_t)end) { 2791 addrs[0] = p; 2792 size_t addrs_count = 1; 2793 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2794 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2795 addrs_count++; 2796 } 2797 2798 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2799 return NULL; 2800 } 2801 2802 size_t i = 0; 2803 for (; i < addrs_count; i++) { 2804 if ((validity[i] & 1) != 0) { 2805 if ((validity[i] & 4) != 0) { 2806 if (outdata[types * i + 1] != page_expected->size) { 2807 break; 2808 } 2809 } else 2810 if (page_expected->size != 0) { 2811 break; 2812 } 2813 2814 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2815 if (outdata[types * i] != page_expected->lgrp_id) { 2816 break; 2817 } 2818 } 2819 } else { 2820 return NULL; 2821 } 2822 } 2823 2824 if (i != addrs_count) { 2825 if ((validity[i] & 2) != 0) { 2826 page_found->lgrp_id = outdata[types * i]; 2827 } else { 2828 page_found->lgrp_id = -1; 2829 } 2830 if ((validity[i] & 4) != 0) { 2831 page_found->size = outdata[types * i + 1]; 2832 } else { 2833 page_found->size = 0; 2834 } 2835 return (char*)addrs[i]; 2836 } 2837 2838 p = addrs[addrs_count - 1] + page_size; 2839 } 2840 return end; 2841} 2842 2843bool os::uncommit_memory(char* addr, size_t bytes) { 2844 size_t size = bytes; 2845 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2846 // uncommitted page. Otherwise, the read/write might succeed if we 2847 // have enough swap space to back the physical page. 2848 return 2849 NULL != Solaris::mmap_chunk(addr, size, 2850 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2851 PROT_NONE); 2852} 2853 2854char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2855 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2856 2857 if (b == MAP_FAILED) { 2858 return NULL; 2859 } 2860 return b; 2861} 2862 2863char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2864 char* addr = requested_addr; 2865 int flags = MAP_PRIVATE | MAP_NORESERVE; 2866 2867 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2868 2869 if (fixed) { 2870 flags |= MAP_FIXED; 2871 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2872 flags |= MAP_ALIGN; 2873 addr = (char*) alignment_hint; 2874 } 2875 2876 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2877 // uncommitted page. Otherwise, the read/write might succeed if we 2878 // have enough swap space to back the physical page. 2879 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2880} 2881 2882char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2883 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2884 2885 guarantee(requested_addr == NULL || requested_addr == addr, 2886 "OS failed to return requested mmap address."); 2887 return addr; 2888} 2889 2890// Reserve memory at an arbitrary address, only if that area is 2891// available (and not reserved for something else). 2892 2893char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2894 const int max_tries = 10; 2895 char* base[max_tries]; 2896 size_t size[max_tries]; 2897 2898 // Solaris adds a gap between mmap'ed regions. The size of the gap 2899 // is dependent on the requested size and the MMU. Our initial gap 2900 // value here is just a guess and will be corrected later. 2901 bool had_top_overlap = false; 2902 bool have_adjusted_gap = false; 2903 size_t gap = 0x400000; 2904 2905 // Assert only that the size is a multiple of the page size, since 2906 // that's all that mmap requires, and since that's all we really know 2907 // about at this low abstraction level. If we need higher alignment, 2908 // we can either pass an alignment to this method or verify alignment 2909 // in one of the methods further up the call chain. See bug 5044738. 2910 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2911 2912 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2913 // Give it a try, if the kernel honors the hint we can return immediately. 2914 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2915 volatile int err = errno; 2916 if (addr == requested_addr) { 2917 return addr; 2918 } else if (addr != NULL) { 2919 unmap_memory(addr, bytes); 2920 } 2921 2922 if (PrintMiscellaneous && Verbose) { 2923 char buf[256]; 2924 buf[0] = '\0'; 2925 if (addr == NULL) { 2926 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2927 } 2928 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2929 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2930 "%s", bytes, requested_addr, addr, buf); 2931 } 2932 2933 // Address hint method didn't work. Fall back to the old method. 2934 // In theory, once SNV becomes our oldest supported platform, this 2935 // code will no longer be needed. 2936 // 2937 // Repeatedly allocate blocks until the block is allocated at the 2938 // right spot. Give up after max_tries. 2939 int i; 2940 for (i = 0; i < max_tries; ++i) { 2941 base[i] = reserve_memory(bytes); 2942 2943 if (base[i] != NULL) { 2944 // Is this the block we wanted? 2945 if (base[i] == requested_addr) { 2946 size[i] = bytes; 2947 break; 2948 } 2949 2950 // check that the gap value is right 2951 if (had_top_overlap && !have_adjusted_gap) { 2952 size_t actual_gap = base[i-1] - base[i] - bytes; 2953 if (gap != actual_gap) { 2954 // adjust the gap value and retry the last 2 allocations 2955 assert(i > 0, "gap adjustment code problem"); 2956 have_adjusted_gap = true; // adjust the gap only once, just in case 2957 gap = actual_gap; 2958 if (PrintMiscellaneous && Verbose) { 2959 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2960 } 2961 unmap_memory(base[i], bytes); 2962 unmap_memory(base[i-1], size[i-1]); 2963 i-=2; 2964 continue; 2965 } 2966 } 2967 2968 // Does this overlap the block we wanted? Give back the overlapped 2969 // parts and try again. 2970 // 2971 // There is still a bug in this code: if top_overlap == bytes, 2972 // the overlap is offset from requested region by the value of gap. 2973 // In this case giving back the overlapped part will not work, 2974 // because we'll give back the entire block at base[i] and 2975 // therefore the subsequent allocation will not generate a new gap. 2976 // This could be fixed with a new algorithm that used larger 2977 // or variable size chunks to find the requested region - 2978 // but such a change would introduce additional complications. 2979 // It's rare enough that the planets align for this bug, 2980 // so we'll just wait for a fix for 6204603/5003415 which 2981 // will provide a mmap flag to allow us to avoid this business. 2982 2983 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2984 if (top_overlap >= 0 && top_overlap < bytes) { 2985 had_top_overlap = true; 2986 unmap_memory(base[i], top_overlap); 2987 base[i] += top_overlap; 2988 size[i] = bytes - top_overlap; 2989 } else { 2990 size_t bottom_overlap = base[i] + bytes - requested_addr; 2991 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2992 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2993 warning("attempt_reserve_memory_at: possible alignment bug"); 2994 } 2995 unmap_memory(requested_addr, bottom_overlap); 2996 size[i] = bytes - bottom_overlap; 2997 } else { 2998 size[i] = bytes; 2999 } 3000 } 3001 } 3002 } 3003 3004 // Give back the unused reserved pieces. 3005 3006 for (int j = 0; j < i; ++j) { 3007 if (base[j] != NULL) { 3008 unmap_memory(base[j], size[j]); 3009 } 3010 } 3011 3012 return (i < max_tries) ? requested_addr : NULL; 3013} 3014 3015bool os::release_memory(char* addr, size_t bytes) { 3016 size_t size = bytes; 3017 return munmap(addr, size) == 0; 3018} 3019 3020static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 3021 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 3022 "addr must be page aligned"); 3023 int retVal = mprotect(addr, bytes, prot); 3024 return retVal == 0; 3025} 3026 3027// Protect memory (Used to pass readonly pages through 3028// JNI GetArray<type>Elements with empty arrays.) 3029bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 3030 bool is_committed) { 3031 unsigned int p = 0; 3032 switch (prot) { 3033 case MEM_PROT_NONE: p = PROT_NONE; break; 3034 case MEM_PROT_READ: p = PROT_READ; break; 3035 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 3036 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 3037 default: 3038 ShouldNotReachHere(); 3039 } 3040 // is_committed is unused. 3041 return solaris_mprotect(addr, bytes, p); 3042} 3043 3044// guard_memory and unguard_memory only happens within stack guard pages. 3045// Since ISM pertains only to the heap, guard and unguard memory should not 3046/// happen with an ISM region. 3047bool os::guard_memory(char* addr, size_t bytes) { 3048 return solaris_mprotect(addr, bytes, PROT_NONE); 3049} 3050 3051bool os::unguard_memory(char* addr, size_t bytes) { 3052 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 3053} 3054 3055// Large page support 3056 3057// UseLargePages is the master flag to enable/disable large page memory. 3058// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3059// effects can be described in the following table: 3060// 3061// UseLargePages UseMPSS UseISM 3062// false * * => UseLargePages is the master switch, turning 3063// it off will turn off both UseMPSS and 3064// UseISM. VM will not use large page memory 3065// regardless the settings of UseMPSS/UseISM. 3066// true false false => Unless future Solaris provides other 3067// mechanism to use large page memory, this 3068// combination is equivalent to -UseLargePages, 3069// VM will not use large page memory 3070// true true false => JVM will use MPSS for large page memory. 3071// This is the default behavior. 3072// true false true => JVM will use ISM for large page memory. 3073// true true true => JVM will use ISM if it is available. 3074// Otherwise, JVM will fall back to MPSS. 3075// Becaues ISM is now available on all 3076// supported Solaris versions, this combination 3077// is equivalent to +UseISM -UseMPSS. 3078 3079typedef int (*getpagesizes_func_type) (size_t[], int); 3080static size_t _large_page_size = 0; 3081 3082bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3083 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3084 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3085 // can support multiple page sizes. 3086 3087 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3088 // ISM is only recommended on old Solaris where there is no MPSS support. 3089 // Simply choose a conservative value as default. 3090 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3091 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3092 3093 // ISM is available on all supported Solaris versions 3094 return true; 3095} 3096 3097// Insertion sort for small arrays (descending order). 3098static void insertion_sort_descending(size_t* array, int len) { 3099 for (int i = 0; i < len; i++) { 3100 size_t val = array[i]; 3101 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3102 size_t tmp = array[key]; 3103 array[key] = array[key - 1]; 3104 array[key - 1] = tmp; 3105 } 3106 } 3107} 3108 3109bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3110 getpagesizes_func_type getpagesizes_func = 3111 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3112 if (getpagesizes_func == NULL) { 3113 if (warn) { 3114 warning("MPSS is not supported by the operating system."); 3115 } 3116 return false; 3117 } 3118 3119 const unsigned int usable_count = VM_Version::page_size_count(); 3120 if (usable_count == 1) { 3121 return false; 3122 } 3123 3124 // Fill the array of page sizes. 3125 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3126 assert(n > 0, "Solaris bug?"); 3127 if (n == page_sizes_max) { 3128 // Add a sentinel value (necessary only if the array was completely filled 3129 // since it is static (zeroed at initialization)). 3130 _page_sizes[--n] = 0; 3131 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3132 } 3133 assert(_page_sizes[n] == 0, "missing sentinel"); 3134 3135 if (n == 1) return false; // Only one page size available. 3136 3137 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3138 // select up to usable_count elements. First sort the array, find the first 3139 // acceptable value, then copy the usable sizes to the top of the array and 3140 // trim the rest. Make sure to include the default page size :-). 3141 // 3142 // A better policy could get rid of the 4M limit by taking the sizes of the 3143 // important VM memory regions (java heap and possibly the code cache) into 3144 // account. 3145 insertion_sort_descending(_page_sizes, n); 3146 const size_t size_limit = 3147 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3148 int beg; 3149 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3150 const int end = MIN2((int)usable_count, n) - 1; 3151 for (int cur = 0; cur < end; ++cur, ++beg) { 3152 _page_sizes[cur] = _page_sizes[beg]; 3153 } 3154 _page_sizes[end] = vm_page_size(); 3155 _page_sizes[end + 1] = 0; 3156 3157 if (_page_sizes[end] > _page_sizes[end - 1]) { 3158 // Default page size is not the smallest; sort again. 3159 insertion_sort_descending(_page_sizes, end + 1); 3160 } 3161 *page_size = _page_sizes[0]; 3162 3163 return true; 3164} 3165 3166bool os::large_page_init() { 3167 if (!UseLargePages) { 3168 UseISM = false; 3169 UseMPSS = false; 3170 return false; 3171 } 3172 3173 // print a warning if any large page related flag is specified on command line 3174 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3175 !FLAG_IS_DEFAULT(UseISM) || 3176 !FLAG_IS_DEFAULT(UseMPSS) || 3177 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3178 UseISM = UseISM && 3179 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3180 if (UseISM) { 3181 // ISM disables MPSS to be compatible with old JDK behavior 3182 UseMPSS = false; 3183 _page_sizes[0] = _large_page_size; 3184 _page_sizes[1] = vm_page_size(); 3185 } 3186 3187 UseMPSS = UseMPSS && 3188 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3189 3190 UseLargePages = UseISM || UseMPSS; 3191 return UseLargePages; 3192} 3193 3194bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3195 // Signal to OS that we want large pages for addresses 3196 // from addr, addr + bytes 3197 struct memcntl_mha mpss_struct; 3198 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3199 mpss_struct.mha_pagesize = align; 3200 mpss_struct.mha_flags = 0; 3201 if (memcntl(start, bytes, MC_HAT_ADVISE, 3202 (caddr_t) &mpss_struct, 0, 0) < 0) { 3203 debug_only(warning("Attempt to use MPSS failed.")); 3204 return false; 3205 } 3206 return true; 3207} 3208 3209char* os::reserve_memory_special(size_t bytes) { 3210 assert(UseLargePages && UseISM, "only for ISM large pages"); 3211 3212 size_t size = bytes; 3213 char* retAddr = NULL; 3214 int shmid; 3215 key_t ismKey; 3216 3217 bool warn_on_failure = UseISM && 3218 (!FLAG_IS_DEFAULT(UseLargePages) || 3219 !FLAG_IS_DEFAULT(UseISM) || 3220 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3221 ); 3222 char msg[128]; 3223 3224 ismKey = IPC_PRIVATE; 3225 3226 // Create a large shared memory region to attach to based on size. 3227 // Currently, size is the total size of the heap 3228 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3229 if (shmid == -1){ 3230 if (warn_on_failure) { 3231 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3232 warning(msg); 3233 } 3234 return NULL; 3235 } 3236 3237 // Attach to the region 3238 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3239 int err = errno; 3240 3241 // Remove shmid. If shmat() is successful, the actual shared memory segment 3242 // will be deleted when it's detached by shmdt() or when the process 3243 // terminates. If shmat() is not successful this will remove the shared 3244 // segment immediately. 3245 shmctl(shmid, IPC_RMID, NULL); 3246 3247 if (retAddr == (char *) -1) { 3248 if (warn_on_failure) { 3249 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3250 warning(msg); 3251 } 3252 return NULL; 3253 } 3254 3255 return retAddr; 3256} 3257 3258bool os::release_memory_special(char* base, size_t bytes) { 3259 // detaching the SHM segment will also delete it, see reserve_memory_special() 3260 int rslt = shmdt(base); 3261 return rslt == 0; 3262} 3263 3264size_t os::large_page_size() { 3265 return _large_page_size; 3266} 3267 3268// MPSS allows application to commit large page memory on demand; with ISM 3269// the entire memory region must be allocated as shared memory. 3270bool os::can_commit_large_page_memory() { 3271 return UseISM ? false : true; 3272} 3273 3274bool os::can_execute_large_page_memory() { 3275 return UseISM ? false : true; 3276} 3277 3278static int os_sleep(jlong millis, bool interruptible) { 3279 const jlong limit = INT_MAX; 3280 jlong prevtime; 3281 int res; 3282 3283 while (millis > limit) { 3284 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3285 return res; 3286 millis -= limit; 3287 } 3288 3289 // Restart interrupted polls with new parameters until the proper delay 3290 // has been completed. 3291 3292 prevtime = getTimeMillis(); 3293 3294 while (millis > 0) { 3295 jlong newtime; 3296 3297 if (!interruptible) { 3298 // Following assert fails for os::yield_all: 3299 // assert(!thread->is_Java_thread(), "must not be java thread"); 3300 res = poll(NULL, 0, millis); 3301 } else { 3302 JavaThread *jt = JavaThread::current(); 3303 3304 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3305 os::Solaris::clear_interrupted); 3306 } 3307 3308 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3309 // thread.Interrupt. 3310 3311 if((res == OS_ERR) && (errno == EINTR)) { 3312 newtime = getTimeMillis(); 3313 assert(newtime >= prevtime, "time moving backwards"); 3314 /* Doing prevtime and newtime in microseconds doesn't help precision, 3315 and trying to round up to avoid lost milliseconds can result in a 3316 too-short delay. */ 3317 millis -= newtime - prevtime; 3318 if(millis <= 0) 3319 return OS_OK; 3320 prevtime = newtime; 3321 } else 3322 return res; 3323 } 3324 3325 return OS_OK; 3326} 3327 3328// Read calls from inside the vm need to perform state transitions 3329size_t os::read(int fd, void *buf, unsigned int nBytes) { 3330 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3331} 3332 3333int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3334 assert(thread == Thread::current(), "thread consistency check"); 3335 3336 // TODO-FIXME: this should be removed. 3337 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3338 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3339 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3340 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3341 // is fooled into believing that the system is making progress. In the code below we block the 3342 // the watcher thread while safepoint is in progress so that it would not appear as though the 3343 // system is making progress. 3344 if (!Solaris::T2_libthread() && 3345 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3346 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3347 // the entire safepoint, the watcher thread will line up here during the safepoint. 3348 Threads_lock->lock_without_safepoint_check(); 3349 Threads_lock->unlock(); 3350 } 3351 3352 if (thread->is_Java_thread()) { 3353 // This is a JavaThread so we honor the _thread_blocked protocol 3354 // even for sleeps of 0 milliseconds. This was originally done 3355 // as a workaround for bug 4338139. However, now we also do it 3356 // to honor the suspend-equivalent protocol. 3357 3358 JavaThread *jt = (JavaThread *) thread; 3359 ThreadBlockInVM tbivm(jt); 3360 3361 jt->set_suspend_equivalent(); 3362 // cleared by handle_special_suspend_equivalent_condition() or 3363 // java_suspend_self() via check_and_wait_while_suspended() 3364 3365 int ret_code; 3366 if (millis <= 0) { 3367 thr_yield(); 3368 ret_code = 0; 3369 } else { 3370 // The original sleep() implementation did not create an 3371 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3372 // I'm preserving that decision for now. 3373 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3374 3375 ret_code = os_sleep(millis, interruptible); 3376 } 3377 3378 // were we externally suspended while we were waiting? 3379 jt->check_and_wait_while_suspended(); 3380 3381 return ret_code; 3382 } 3383 3384 // non-JavaThread from this point on: 3385 3386 if (millis <= 0) { 3387 thr_yield(); 3388 return 0; 3389 } 3390 3391 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3392 3393 return os_sleep(millis, interruptible); 3394} 3395 3396int os::naked_sleep() { 3397 // %% make the sleep time an integer flag. for now use 1 millisec. 3398 return os_sleep(1, false); 3399} 3400 3401// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3402void os::infinite_sleep() { 3403 while (true) { // sleep forever ... 3404 ::sleep(100); // ... 100 seconds at a time 3405 } 3406} 3407 3408// Used to convert frequent JVM_Yield() to nops 3409bool os::dont_yield() { 3410 if (DontYieldALot) { 3411 static hrtime_t last_time = 0; 3412 hrtime_t diff = getTimeNanos() - last_time; 3413 3414 if (diff < DontYieldALotInterval * 1000000) 3415 return true; 3416 3417 last_time += diff; 3418 3419 return false; 3420 } 3421 else { 3422 return false; 3423 } 3424} 3425 3426// Caveat: Solaris os::yield() causes a thread-state transition whereas 3427// the linux and win32 implementations do not. This should be checked. 3428 3429void os::yield() { 3430 // Yields to all threads with same or greater priority 3431 os::sleep(Thread::current(), 0, false); 3432} 3433 3434// Note that yield semantics are defined by the scheduling class to which 3435// the thread currently belongs. Typically, yield will _not yield to 3436// other equal or higher priority threads that reside on the dispatch queues 3437// of other CPUs. 3438 3439os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3440 3441 3442// On Solaris we found that yield_all doesn't always yield to all other threads. 3443// There have been cases where there is a thread ready to execute but it doesn't 3444// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3445// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3446// SIGWAITING signal which will cause a new lwp to be created. So we count the 3447// number of times yield_all is called in the one loop and increase the sleep 3448// time after 8 attempts. If this fails too we increase the concurrency level 3449// so that the starving thread would get an lwp 3450 3451void os::yield_all(int attempts) { 3452 // Yields to all threads, including threads with lower priorities 3453 if (attempts == 0) { 3454 os::sleep(Thread::current(), 1, false); 3455 } else { 3456 int iterations = attempts % 30; 3457 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3458 // thr_setconcurrency and _getconcurrency make sense only under T1. 3459 int noofLWPS = thr_getconcurrency(); 3460 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3461 thr_setconcurrency(thr_getconcurrency() + 1); 3462 } 3463 } else if (iterations < 25) { 3464 os::sleep(Thread::current(), 1, false); 3465 } else { 3466 os::sleep(Thread::current(), 10, false); 3467 } 3468 } 3469} 3470 3471// Called from the tight loops to possibly influence time-sharing heuristics 3472void os::loop_breaker(int attempts) { 3473 os::yield_all(attempts); 3474} 3475 3476 3477// Interface for setting lwp priorities. If we are using T2 libthread, 3478// which forces the use of BoundThreads or we manually set UseBoundThreads, 3479// all of our threads will be assigned to real lwp's. Using the thr_setprio 3480// function is meaningless in this mode so we must adjust the real lwp's priority 3481// The routines below implement the getting and setting of lwp priorities. 3482// 3483// Note: There are three priority scales used on Solaris. Java priotities 3484// which range from 1 to 10, libthread "thr_setprio" scale which range 3485// from 0 to 127, and the current scheduling class of the process we 3486// are running in. This is typically from -60 to +60. 3487// The setting of the lwp priorities in done after a call to thr_setprio 3488// so Java priorities are mapped to libthread priorities and we map from 3489// the latter to lwp priorities. We don't keep priorities stored in 3490// Java priorities since some of our worker threads want to set priorities 3491// higher than all Java threads. 3492// 3493// For related information: 3494// (1) man -s 2 priocntl 3495// (2) man -s 4 priocntl 3496// (3) man dispadmin 3497// = librt.so 3498// = libthread/common/rtsched.c - thrp_setlwpprio(). 3499// = ps -cL <pid> ... to validate priority. 3500// = sched_get_priority_min and _max 3501// pthread_create 3502// sched_setparam 3503// pthread_setschedparam 3504// 3505// Assumptions: 3506// + We assume that all threads in the process belong to the same 3507// scheduling class. IE. an homogenous process. 3508// + Must be root or in IA group to change change "interactive" attribute. 3509// Priocntl() will fail silently. The only indication of failure is when 3510// we read-back the value and notice that it hasn't changed. 3511// + Interactive threads enter the runq at the head, non-interactive at the tail. 3512// + For RT, change timeslice as well. Invariant: 3513// constant "priority integral" 3514// Konst == TimeSlice * (60-Priority) 3515// Given a priority, compute appropriate timeslice. 3516// + Higher numerical values have higher priority. 3517 3518// sched class attributes 3519typedef struct { 3520 int schedPolicy; // classID 3521 int maxPrio; 3522 int minPrio; 3523} SchedInfo; 3524 3525 3526static SchedInfo tsLimits, iaLimits, rtLimits; 3527 3528#ifdef ASSERT 3529static int ReadBackValidate = 1; 3530#endif 3531static int myClass = 0; 3532static int myMin = 0; 3533static int myMax = 0; 3534static int myCur = 0; 3535static bool priocntl_enable = false; 3536 3537 3538// Call the version of priocntl suitable for all supported versions 3539// of Solaris. We need to call through this wrapper so that we can 3540// build on Solaris 9 and run on Solaris 8, 9 and 10. 3541// 3542// This code should be removed if we ever stop supporting Solaris 8 3543// and earlier releases. 3544 3545static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3546typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3547static priocntl_type priocntl_ptr = priocntl_stub; 3548 3549// Stub to set the value of the real pointer, and then call the real 3550// function. 3551 3552static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3553 // Try Solaris 8- name only. 3554 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3555 guarantee(tmp != NULL, "priocntl function not found."); 3556 priocntl_ptr = tmp; 3557 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3558} 3559 3560 3561// lwp_priocntl_init 3562// 3563// Try to determine the priority scale for our process. 3564// 3565// Return errno or 0 if OK. 3566// 3567static 3568int lwp_priocntl_init () 3569{ 3570 int rslt; 3571 pcinfo_t ClassInfo; 3572 pcparms_t ParmInfo; 3573 int i; 3574 3575 if (!UseThreadPriorities) return 0; 3576 3577 // We are using Bound threads, we need to determine our priority ranges 3578 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3579 // If ThreadPriorityPolicy is 1, switch tables 3580 if (ThreadPriorityPolicy == 1) { 3581 for (i = 0 ; i < MaxPriority+1; i++) 3582 os::java_to_os_priority[i] = prio_policy1[i]; 3583 } 3584 } 3585 // Not using Bound Threads, set to ThreadPolicy 1 3586 else { 3587 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3588 os::java_to_os_priority[i] = prio_policy1[i]; 3589 } 3590 return 0; 3591 } 3592 3593 3594 // Get IDs for a set of well-known scheduling classes. 3595 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3596 // the system. We should have a loop that iterates over the 3597 // classID values, which are known to be "small" integers. 3598 3599 strcpy(ClassInfo.pc_clname, "TS"); 3600 ClassInfo.pc_cid = -1; 3601 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3602 if (rslt < 0) return errno; 3603 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3604 tsLimits.schedPolicy = ClassInfo.pc_cid; 3605 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3606 tsLimits.minPrio = -tsLimits.maxPrio; 3607 3608 strcpy(ClassInfo.pc_clname, "IA"); 3609 ClassInfo.pc_cid = -1; 3610 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3611 if (rslt < 0) return errno; 3612 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3613 iaLimits.schedPolicy = ClassInfo.pc_cid; 3614 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3615 iaLimits.minPrio = -iaLimits.maxPrio; 3616 3617 strcpy(ClassInfo.pc_clname, "RT"); 3618 ClassInfo.pc_cid = -1; 3619 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3620 if (rslt < 0) return errno; 3621 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3622 rtLimits.schedPolicy = ClassInfo.pc_cid; 3623 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3624 rtLimits.minPrio = 0; 3625 3626 3627 // Query our "current" scheduling class. 3628 // This will normally be IA,TS or, rarely, RT. 3629 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3630 ParmInfo.pc_cid = PC_CLNULL; 3631 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3632 if ( rslt < 0 ) return errno; 3633 myClass = ParmInfo.pc_cid; 3634 3635 // We now know our scheduling classId, get specific information 3636 // the class. 3637 ClassInfo.pc_cid = myClass; 3638 ClassInfo.pc_clname[0] = 0; 3639 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3640 if ( rslt < 0 ) return errno; 3641 3642 if (ThreadPriorityVerbose) 3643 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3644 3645 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3646 ParmInfo.pc_cid = PC_CLNULL; 3647 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3648 if (rslt < 0) return errno; 3649 3650 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3651 myMin = rtLimits.minPrio; 3652 myMax = rtLimits.maxPrio; 3653 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3654 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3655 myMin = iaLimits.minPrio; 3656 myMax = iaLimits.maxPrio; 3657 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3658 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3659 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3660 myMin = tsLimits.minPrio; 3661 myMax = tsLimits.maxPrio; 3662 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3663 } else { 3664 // No clue - punt 3665 if (ThreadPriorityVerbose) 3666 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3667 return EINVAL; // no clue, punt 3668 } 3669 3670 if (ThreadPriorityVerbose) 3671 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3672 3673 priocntl_enable = true; // Enable changing priorities 3674 return 0; 3675} 3676 3677#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3678#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3679#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3680 3681 3682// scale_to_lwp_priority 3683// 3684// Convert from the libthread "thr_setprio" scale to our current 3685// lwp scheduling class scale. 3686// 3687static 3688int scale_to_lwp_priority (int rMin, int rMax, int x) 3689{ 3690 int v; 3691 3692 if (x == 127) return rMax; // avoid round-down 3693 v = (((x*(rMax-rMin)))/128)+rMin; 3694 return v; 3695} 3696 3697 3698// set_lwp_priority 3699// 3700// Set the priority of the lwp. This call should only be made 3701// when using bound threads (T2 threads are bound by default). 3702// 3703int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3704{ 3705 int rslt; 3706 int Actual, Expected, prv; 3707 pcparms_t ParmInfo; // for GET-SET 3708#ifdef ASSERT 3709 pcparms_t ReadBack; // for readback 3710#endif 3711 3712 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3713 // Query current values. 3714 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3715 // Cache "pcparms_t" in global ParmCache. 3716 // TODO: elide set-to-same-value 3717 3718 // If something went wrong on init, don't change priorities. 3719 if ( !priocntl_enable ) { 3720 if (ThreadPriorityVerbose) 3721 tty->print_cr("Trying to set priority but init failed, ignoring"); 3722 return EINVAL; 3723 } 3724 3725 3726 // If lwp hasn't started yet, just return 3727 // the _start routine will call us again. 3728 if ( lwpid <= 0 ) { 3729 if (ThreadPriorityVerbose) { 3730 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3731 ThreadID, newPrio); 3732 } 3733 return 0; 3734 } 3735 3736 if (ThreadPriorityVerbose) { 3737 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3738 ThreadID, lwpid, newPrio); 3739 } 3740 3741 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3742 ParmInfo.pc_cid = PC_CLNULL; 3743 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3744 if (rslt < 0) return errno; 3745 3746 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3747 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3748 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3749 rtInfo->rt_tqsecs = RT_NOCHANGE; 3750 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3751 if (ThreadPriorityVerbose) { 3752 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3753 } 3754 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3755 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3756 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3757 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3758 iaInfo->ia_uprilim = IA_NOCHANGE; 3759 iaInfo->ia_mode = IA_NOCHANGE; 3760 if (ThreadPriorityVerbose) { 3761 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3762 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3763 } 3764 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3765 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3766 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3767 prv = tsInfo->ts_upri; 3768 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3769 tsInfo->ts_uprilim = IA_NOCHANGE; 3770 if (ThreadPriorityVerbose) { 3771 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3772 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3773 } 3774 if (prv == tsInfo->ts_upri) return 0; 3775 } else { 3776 if ( ThreadPriorityVerbose ) { 3777 tty->print_cr ("Unknown scheduling class\n"); 3778 } 3779 return EINVAL; // no clue, punt 3780 } 3781 3782 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3783 if (ThreadPriorityVerbose && rslt) { 3784 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3785 } 3786 if (rslt < 0) return errno; 3787 3788#ifdef ASSERT 3789 // Sanity check: read back what we just attempted to set. 3790 // In theory it could have changed in the interim ... 3791 // 3792 // The priocntl system call is tricky. 3793 // Sometimes it'll validate the priority value argument and 3794 // return EINVAL if unhappy. At other times it fails silently. 3795 // Readbacks are prudent. 3796 3797 if (!ReadBackValidate) return 0; 3798 3799 memset(&ReadBack, 0, sizeof(pcparms_t)); 3800 ReadBack.pc_cid = PC_CLNULL; 3801 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3802 assert(rslt >= 0, "priocntl failed"); 3803 Actual = Expected = 0xBAD; 3804 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3805 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3806 Actual = RTPRI(ReadBack)->rt_pri; 3807 Expected = RTPRI(ParmInfo)->rt_pri; 3808 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3809 Actual = IAPRI(ReadBack)->ia_upri; 3810 Expected = IAPRI(ParmInfo)->ia_upri; 3811 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3812 Actual = TSPRI(ReadBack)->ts_upri; 3813 Expected = TSPRI(ParmInfo)->ts_upri; 3814 } else { 3815 if ( ThreadPriorityVerbose ) { 3816 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3817 } 3818 } 3819 3820 if (Actual != Expected) { 3821 if ( ThreadPriorityVerbose ) { 3822 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3823 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3824 } 3825 } 3826#endif 3827 3828 return 0; 3829} 3830 3831 3832 3833// Solaris only gives access to 128 real priorities at a time, 3834// so we expand Java's ten to fill this range. This would be better 3835// if we dynamically adjusted relative priorities. 3836// 3837// The ThreadPriorityPolicy option allows us to select 2 different 3838// priority scales. 3839// 3840// ThreadPriorityPolicy=0 3841// Since the Solaris' default priority is MaximumPriority, we do not 3842// set a priority lower than Max unless a priority lower than 3843// NormPriority is requested. 3844// 3845// ThreadPriorityPolicy=1 3846// This mode causes the priority table to get filled with 3847// linear values. NormPriority get's mapped to 50% of the 3848// Maximum priority an so on. This will cause VM threads 3849// to get unfair treatment against other Solaris processes 3850// which do not explicitly alter their thread priorities. 3851// 3852 3853 3854int os::java_to_os_priority[MaxPriority + 1] = { 3855 -99999, // 0 Entry should never be used 3856 3857 0, // 1 MinPriority 3858 32, // 2 3859 64, // 3 3860 3861 96, // 4 3862 127, // 5 NormPriority 3863 127, // 6 3864 3865 127, // 7 3866 127, // 8 3867 127, // 9 NearMaxPriority 3868 3869 127 // 10 MaxPriority 3870}; 3871 3872 3873OSReturn os::set_native_priority(Thread* thread, int newpri) { 3874 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3875 if ( !UseThreadPriorities ) return OS_OK; 3876 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3877 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3878 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3879 thread->osthread()->lwp_id(), newpri )); 3880 return (status == 0) ? OS_OK : OS_ERR; 3881} 3882 3883 3884OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3885 int p; 3886 if ( !UseThreadPriorities ) { 3887 *priority_ptr = NormalPriority; 3888 return OS_OK; 3889 } 3890 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3891 if (status != 0) { 3892 return OS_ERR; 3893 } 3894 *priority_ptr = p; 3895 return OS_OK; 3896} 3897 3898 3899// Hint to the underlying OS that a task switch would not be good. 3900// Void return because it's a hint and can fail. 3901void os::hint_no_preempt() { 3902 schedctl_start(schedctl_init()); 3903} 3904 3905void os::interrupt(Thread* thread) { 3906 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3907 3908 OSThread* osthread = thread->osthread(); 3909 3910 int isInterrupted = osthread->interrupted(); 3911 if (!isInterrupted) { 3912 osthread->set_interrupted(true); 3913 OrderAccess::fence(); 3914 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3915 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3916 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3917 ParkEvent * const slp = thread->_SleepEvent ; 3918 if (slp != NULL) slp->unpark() ; 3919 } 3920 3921 // For JSR166: unpark after setting status but before thr_kill -dl 3922 if (thread->is_Java_thread()) { 3923 ((JavaThread*)thread)->parker()->unpark(); 3924 } 3925 3926 // Handle interruptible wait() ... 3927 ParkEvent * const ev = thread->_ParkEvent ; 3928 if (ev != NULL) ev->unpark() ; 3929 3930 // When events are used everywhere for os::sleep, then this thr_kill 3931 // will only be needed if UseVMInterruptibleIO is true. 3932 3933 if (!isInterrupted) { 3934 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3935 assert_status(status == 0, status, "thr_kill"); 3936 3937 // Bump thread interruption counter 3938 RuntimeService::record_thread_interrupt_signaled_count(); 3939 } 3940} 3941 3942 3943bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3944 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3945 3946 OSThread* osthread = thread->osthread(); 3947 3948 bool res = osthread->interrupted(); 3949 3950 // NOTE that since there is no "lock" around these two operations, 3951 // there is the possibility that the interrupted flag will be 3952 // "false" but that the interrupt event will be set. This is 3953 // intentional. The effect of this is that Object.wait() will appear 3954 // to have a spurious wakeup, which is not harmful, and the 3955 // possibility is so rare that it is not worth the added complexity 3956 // to add yet another lock. It has also been recommended not to put 3957 // the interrupted flag into the os::Solaris::Event structure, 3958 // because it hides the issue. 3959 if (res && clear_interrupted) { 3960 osthread->set_interrupted(false); 3961 } 3962 return res; 3963} 3964 3965 3966void os::print_statistics() { 3967} 3968 3969int os::message_box(const char* title, const char* message) { 3970 int i; 3971 fdStream err(defaultStream::error_fd()); 3972 for (i = 0; i < 78; i++) err.print_raw("="); 3973 err.cr(); 3974 err.print_raw_cr(title); 3975 for (i = 0; i < 78; i++) err.print_raw("-"); 3976 err.cr(); 3977 err.print_raw_cr(message); 3978 for (i = 0; i < 78; i++) err.print_raw("="); 3979 err.cr(); 3980 3981 char buf[16]; 3982 // Prevent process from exiting upon "read error" without consuming all CPU 3983 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3984 3985 return buf[0] == 'y' || buf[0] == 'Y'; 3986} 3987 3988// A lightweight implementation that does not suspend the target thread and 3989// thus returns only a hint. Used for profiling only! 3990ExtendedPC os::get_thread_pc(Thread* thread) { 3991 // Make sure that it is called by the watcher and the Threads lock is owned. 3992 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3993 // For now, is only used to profile the VM Thread 3994 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3995 ExtendedPC epc; 3996 3997 GetThreadPC_Callback cb(ProfileVM_lock); 3998 OSThread *osthread = thread->osthread(); 3999 const int time_to_wait = 400; // 400ms wait for initial response 4000 int status = cb.interrupt(thread, time_to_wait); 4001 4002 if (cb.is_done() ) { 4003 epc = cb.addr(); 4004 } else { 4005 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 4006 osthread->thread_id(), status);); 4007 // epc is already NULL 4008 } 4009 return epc; 4010} 4011 4012 4013// This does not do anything on Solaris. This is basically a hook for being 4014// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 4015void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 4016 f(value, method, args, thread); 4017} 4018 4019// This routine may be used by user applications as a "hook" to catch signals. 4020// The user-defined signal handler must pass unrecognized signals to this 4021// routine, and if it returns true (non-zero), then the signal handler must 4022// return immediately. If the flag "abort_if_unrecognized" is true, then this 4023// routine will never retun false (zero), but instead will execute a VM panic 4024// routine kill the process. 4025// 4026// If this routine returns false, it is OK to call it again. This allows 4027// the user-defined signal handler to perform checks either before or after 4028// the VM performs its own checks. Naturally, the user code would be making 4029// a serious error if it tried to handle an exception (such as a null check 4030// or breakpoint) that the VM was generating for its own correct operation. 4031// 4032// This routine may recognize any of the following kinds of signals: 4033// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 4034// os::Solaris::SIGasync 4035// It should be consulted by handlers for any of those signals. 4036// It explicitly does not recognize os::Solaris::SIGinterrupt 4037// 4038// The caller of this routine must pass in the three arguments supplied 4039// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4040// field of the structure passed to sigaction(). This routine assumes that 4041// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4042// 4043// Note that the VM will print warnings if it detects conflicting signal 4044// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4045// 4046extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4047 4048 4049void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4050 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4051} 4052 4053/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4054 is needed to provoke threads blocked on IO to return an EINTR 4055 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4056 does NOT participate in signal chaining due to requirement for 4057 NOT setting SA_RESTART to make EINTR work. */ 4058extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4059 if (UseSignalChaining) { 4060 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4061 if (actp && actp->sa_handler) { 4062 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4063 } 4064 } 4065} 4066 4067// This boolean allows users to forward their own non-matching signals 4068// to JVM_handle_solaris_signal, harmlessly. 4069bool os::Solaris::signal_handlers_are_installed = false; 4070 4071// For signal-chaining 4072bool os::Solaris::libjsig_is_loaded = false; 4073typedef struct sigaction *(*get_signal_t)(int); 4074get_signal_t os::Solaris::get_signal_action = NULL; 4075 4076struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4077 struct sigaction *actp = NULL; 4078 4079 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4080 // Retrieve the old signal handler from libjsig 4081 actp = (*get_signal_action)(sig); 4082 } 4083 if (actp == NULL) { 4084 // Retrieve the preinstalled signal handler from jvm 4085 actp = get_preinstalled_handler(sig); 4086 } 4087 4088 return actp; 4089} 4090 4091static bool call_chained_handler(struct sigaction *actp, int sig, 4092 siginfo_t *siginfo, void *context) { 4093 // Call the old signal handler 4094 if (actp->sa_handler == SIG_DFL) { 4095 // It's more reasonable to let jvm treat it as an unexpected exception 4096 // instead of taking the default action. 4097 return false; 4098 } else if (actp->sa_handler != SIG_IGN) { 4099 if ((actp->sa_flags & SA_NODEFER) == 0) { 4100 // automaticlly block the signal 4101 sigaddset(&(actp->sa_mask), sig); 4102 } 4103 4104 sa_handler_t hand; 4105 sa_sigaction_t sa; 4106 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4107 // retrieve the chained handler 4108 if (siginfo_flag_set) { 4109 sa = actp->sa_sigaction; 4110 } else { 4111 hand = actp->sa_handler; 4112 } 4113 4114 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4115 actp->sa_handler = SIG_DFL; 4116 } 4117 4118 // try to honor the signal mask 4119 sigset_t oset; 4120 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4121 4122 // call into the chained handler 4123 if (siginfo_flag_set) { 4124 (*sa)(sig, siginfo, context); 4125 } else { 4126 (*hand)(sig); 4127 } 4128 4129 // restore the signal mask 4130 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4131 } 4132 // Tell jvm's signal handler the signal is taken care of. 4133 return true; 4134} 4135 4136bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4137 bool chained = false; 4138 // signal-chaining 4139 if (UseSignalChaining) { 4140 struct sigaction *actp = get_chained_signal_action(sig); 4141 if (actp != NULL) { 4142 chained = call_chained_handler(actp, sig, siginfo, context); 4143 } 4144 } 4145 return chained; 4146} 4147 4148struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4149 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4150 if (preinstalled_sigs[sig] != 0) { 4151 return &chainedsigactions[sig]; 4152 } 4153 return NULL; 4154} 4155 4156void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4157 4158 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4159 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4160 chainedsigactions[sig] = oldAct; 4161 preinstalled_sigs[sig] = 1; 4162} 4163 4164void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4165 // Check for overwrite. 4166 struct sigaction oldAct; 4167 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4168 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4169 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4170 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4171 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4172 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4173 if (AllowUserSignalHandlers || !set_installed) { 4174 // Do not overwrite; user takes responsibility to forward to us. 4175 return; 4176 } else if (UseSignalChaining) { 4177 if (oktochain) { 4178 // save the old handler in jvm 4179 save_preinstalled_handler(sig, oldAct); 4180 } else { 4181 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4182 } 4183 // libjsig also interposes the sigaction() call below and saves the 4184 // old sigaction on it own. 4185 } else { 4186 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4187 } 4188 } 4189 4190 struct sigaction sigAct; 4191 sigfillset(&(sigAct.sa_mask)); 4192 sigAct.sa_handler = SIG_DFL; 4193 4194 sigAct.sa_sigaction = signalHandler; 4195 // Handle SIGSEGV on alternate signal stack if 4196 // not using stack banging 4197 if (!UseStackBanging && sig == SIGSEGV) { 4198 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4199 // Interruptible i/o requires SA_RESTART cleared so EINTR 4200 // is returned instead of restarting system calls 4201 } else if (sig == os::Solaris::SIGinterrupt()) { 4202 sigemptyset(&sigAct.sa_mask); 4203 sigAct.sa_handler = NULL; 4204 sigAct.sa_flags = SA_SIGINFO; 4205 sigAct.sa_sigaction = sigINTRHandler; 4206 } else { 4207 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4208 } 4209 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4210 4211 sigaction(sig, &sigAct, &oldAct); 4212 4213 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4214 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4215 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4216} 4217 4218 4219#define DO_SIGNAL_CHECK(sig) \ 4220 if (!sigismember(&check_signal_done, sig)) \ 4221 os::Solaris::check_signal_handler(sig) 4222 4223// This method is a periodic task to check for misbehaving JNI applications 4224// under CheckJNI, we can add any periodic checks here 4225 4226void os::run_periodic_checks() { 4227 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4228 // thereby preventing a NULL checks. 4229 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4230 4231 if (check_signals == false) return; 4232 4233 // SEGV and BUS if overridden could potentially prevent 4234 // generation of hs*.log in the event of a crash, debugging 4235 // such a case can be very challenging, so we absolutely 4236 // check for the following for a good measure: 4237 DO_SIGNAL_CHECK(SIGSEGV); 4238 DO_SIGNAL_CHECK(SIGILL); 4239 DO_SIGNAL_CHECK(SIGFPE); 4240 DO_SIGNAL_CHECK(SIGBUS); 4241 DO_SIGNAL_CHECK(SIGPIPE); 4242 DO_SIGNAL_CHECK(SIGXFSZ); 4243 4244 // ReduceSignalUsage allows the user to override these handlers 4245 // see comments at the very top and jvm_solaris.h 4246 if (!ReduceSignalUsage) { 4247 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4248 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4249 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4250 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4251 } 4252 4253 // See comments above for using JVM1/JVM2 and UseAltSigs 4254 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4255 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4256 4257} 4258 4259typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4260 4261static os_sigaction_t os_sigaction = NULL; 4262 4263void os::Solaris::check_signal_handler(int sig) { 4264 char buf[O_BUFLEN]; 4265 address jvmHandler = NULL; 4266 4267 struct sigaction act; 4268 if (os_sigaction == NULL) { 4269 // only trust the default sigaction, in case it has been interposed 4270 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4271 if (os_sigaction == NULL) return; 4272 } 4273 4274 os_sigaction(sig, (struct sigaction*)NULL, &act); 4275 4276 address thisHandler = (act.sa_flags & SA_SIGINFO) 4277 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4278 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4279 4280 4281 switch(sig) { 4282 case SIGSEGV: 4283 case SIGBUS: 4284 case SIGFPE: 4285 case SIGPIPE: 4286 case SIGXFSZ: 4287 case SIGILL: 4288 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4289 break; 4290 4291 case SHUTDOWN1_SIGNAL: 4292 case SHUTDOWN2_SIGNAL: 4293 case SHUTDOWN3_SIGNAL: 4294 case BREAK_SIGNAL: 4295 jvmHandler = (address)user_handler(); 4296 break; 4297 4298 default: 4299 int intrsig = os::Solaris::SIGinterrupt(); 4300 int asynsig = os::Solaris::SIGasync(); 4301 4302 if (sig == intrsig) { 4303 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4304 } else if (sig == asynsig) { 4305 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4306 } else { 4307 return; 4308 } 4309 break; 4310 } 4311 4312 4313 if (thisHandler != jvmHandler) { 4314 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4315 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4316 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4317 // No need to check this sig any longer 4318 sigaddset(&check_signal_done, sig); 4319 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4320 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4321 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4322 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4323 // No need to check this sig any longer 4324 sigaddset(&check_signal_done, sig); 4325 } 4326 4327 // Print all the signal handler state 4328 if (sigismember(&check_signal_done, sig)) { 4329 print_signal_handlers(tty, buf, O_BUFLEN); 4330 } 4331 4332} 4333 4334void os::Solaris::install_signal_handlers() { 4335 bool libjsigdone = false; 4336 signal_handlers_are_installed = true; 4337 4338 // signal-chaining 4339 typedef void (*signal_setting_t)(); 4340 signal_setting_t begin_signal_setting = NULL; 4341 signal_setting_t end_signal_setting = NULL; 4342 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4343 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4344 if (begin_signal_setting != NULL) { 4345 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4346 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4347 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4348 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4349 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4350 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4351 libjsig_is_loaded = true; 4352 if (os::Solaris::get_libjsig_version != NULL) { 4353 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4354 } 4355 assert(UseSignalChaining, "should enable signal-chaining"); 4356 } 4357 if (libjsig_is_loaded) { 4358 // Tell libjsig jvm is setting signal handlers 4359 (*begin_signal_setting)(); 4360 } 4361 4362 set_signal_handler(SIGSEGV, true, true); 4363 set_signal_handler(SIGPIPE, true, true); 4364 set_signal_handler(SIGXFSZ, true, true); 4365 set_signal_handler(SIGBUS, true, true); 4366 set_signal_handler(SIGILL, true, true); 4367 set_signal_handler(SIGFPE, true, true); 4368 4369 4370 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4371 4372 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4373 // can not register overridable signals which might be > 32 4374 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4375 // Tell libjsig jvm has finished setting signal handlers 4376 (*end_signal_setting)(); 4377 libjsigdone = true; 4378 } 4379 } 4380 4381 // Never ok to chain our SIGinterrupt 4382 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4383 set_signal_handler(os::Solaris::SIGasync(), true, true); 4384 4385 if (libjsig_is_loaded && !libjsigdone) { 4386 // Tell libjsig jvm finishes setting signal handlers 4387 (*end_signal_setting)(); 4388 } 4389 4390 // We don't activate signal checker if libjsig is in place, we trust ourselves 4391 // and if UserSignalHandler is installed all bets are off 4392 if (CheckJNICalls) { 4393 if (libjsig_is_loaded) { 4394 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4395 check_signals = false; 4396 } 4397 if (AllowUserSignalHandlers) { 4398 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4399 check_signals = false; 4400 } 4401 } 4402} 4403 4404 4405void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4406 4407const char * signames[] = { 4408 "SIG0", 4409 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4410 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4411 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4412 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4413 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4414 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4415 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4416 "SIGCANCEL", "SIGLOST" 4417}; 4418 4419const char* os::exception_name(int exception_code, char* buf, size_t size) { 4420 if (0 < exception_code && exception_code <= SIGRTMAX) { 4421 // signal 4422 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4423 jio_snprintf(buf, size, "%s", signames[exception_code]); 4424 } else { 4425 jio_snprintf(buf, size, "SIG%d", exception_code); 4426 } 4427 return buf; 4428 } else { 4429 return NULL; 4430 } 4431} 4432 4433// (Static) wrappers for the new libthread API 4434int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4435int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4436int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4437int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4438int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4439 4440// (Static) wrappers for the liblgrp API 4441os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4442os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4443os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4444os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4445os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4446os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4447os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4448os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4449os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4450 4451// (Static) wrapper for meminfo() call. 4452os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4453 4454static address resolve_symbol(const char *name) { 4455 address addr; 4456 4457 addr = (address) dlsym(RTLD_DEFAULT, name); 4458 if(addr == NULL) { 4459 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4460 addr = (address) dlsym(RTLD_NEXT, name); 4461 if(addr == NULL) { 4462 fatal(dlerror()); 4463 } 4464 } 4465 return addr; 4466} 4467 4468 4469 4470// isT2_libthread() 4471// 4472// Routine to determine if we are currently using the new T2 libthread. 4473// 4474// We determine if we are using T2 by reading /proc/self/lstatus and 4475// looking for a thread with the ASLWP bit set. If we find this status 4476// bit set, we must assume that we are NOT using T2. The T2 team 4477// has approved this algorithm. 4478// 4479// We need to determine if we are running with the new T2 libthread 4480// since setting native thread priorities is handled differently 4481// when using this library. All threads created using T2 are bound 4482// threads. Calling thr_setprio is meaningless in this case. 4483// 4484bool isT2_libthread() { 4485 static prheader_t * lwpArray = NULL; 4486 static int lwpSize = 0; 4487 static int lwpFile = -1; 4488 lwpstatus_t * that; 4489 char lwpName [128]; 4490 bool isT2 = false; 4491 4492#define ADR(x) ((uintptr_t)(x)) 4493#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4494 4495 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4496 if (lwpFile < 0) { 4497 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4498 return false; 4499 } 4500 lwpSize = 16*1024; 4501 for (;;) { 4502 lseek (lwpFile, 0, SEEK_SET); 4503 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4504 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4505 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4506 break; 4507 } 4508 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4509 // We got a good snapshot - now iterate over the list. 4510 int aslwpcount = 0; 4511 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4512 that = LWPINDEX(lwpArray,i); 4513 if (that->pr_flags & PR_ASLWP) { 4514 aslwpcount++; 4515 } 4516 } 4517 if (aslwpcount == 0) isT2 = true; 4518 break; 4519 } 4520 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4521 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4522 } 4523 4524 FREE_C_HEAP_ARRAY(char, lwpArray); 4525 close (lwpFile); 4526 if (ThreadPriorityVerbose) { 4527 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4528 else tty->print_cr("We are not running with a T2 libthread\n"); 4529 } 4530 return isT2; 4531} 4532 4533 4534void os::Solaris::libthread_init() { 4535 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4536 4537 // Determine if we are running with the new T2 libthread 4538 os::Solaris::set_T2_libthread(isT2_libthread()); 4539 4540 lwp_priocntl_init(); 4541 4542 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4543 if(func == NULL) { 4544 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4545 // Guarantee that this VM is running on an new enough OS (5.6 or 4546 // later) that it will have a new enough libthread.so. 4547 guarantee(func != NULL, "libthread.so is too old."); 4548 } 4549 4550 // Initialize the new libthread getstate API wrappers 4551 func = resolve_symbol("thr_getstate"); 4552 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4553 4554 func = resolve_symbol("thr_setstate"); 4555 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4556 4557 func = resolve_symbol("thr_setmutator"); 4558 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4559 4560 func = resolve_symbol("thr_suspend_mutator"); 4561 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4562 4563 func = resolve_symbol("thr_continue_mutator"); 4564 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4565 4566 int size; 4567 void (*handler_info_func)(address *, int *); 4568 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4569 handler_info_func(&handler_start, &size); 4570 handler_end = handler_start + size; 4571} 4572 4573 4574int_fnP_mutex_tP os::Solaris::_mutex_lock; 4575int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4576int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4577int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4578int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4579int os::Solaris::_mutex_scope = USYNC_THREAD; 4580 4581int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4582int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4583int_fnP_cond_tP os::Solaris::_cond_signal; 4584int_fnP_cond_tP os::Solaris::_cond_broadcast; 4585int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4586int_fnP_cond_tP os::Solaris::_cond_destroy; 4587int os::Solaris::_cond_scope = USYNC_THREAD; 4588 4589void os::Solaris::synchronization_init() { 4590 if(UseLWPSynchronization) { 4591 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4592 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4593 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4594 os::Solaris::set_mutex_init(lwp_mutex_init); 4595 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4596 os::Solaris::set_mutex_scope(USYNC_THREAD); 4597 4598 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4599 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4600 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4601 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4602 os::Solaris::set_cond_init(lwp_cond_init); 4603 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4604 os::Solaris::set_cond_scope(USYNC_THREAD); 4605 } 4606 else { 4607 os::Solaris::set_mutex_scope(USYNC_THREAD); 4608 os::Solaris::set_cond_scope(USYNC_THREAD); 4609 4610 if(UsePthreads) { 4611 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4612 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4613 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4614 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4615 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4616 4617 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4618 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4619 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4620 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4621 os::Solaris::set_cond_init(pthread_cond_default_init); 4622 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4623 } 4624 else { 4625 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4626 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4627 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4628 os::Solaris::set_mutex_init(::mutex_init); 4629 os::Solaris::set_mutex_destroy(::mutex_destroy); 4630 4631 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4632 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4633 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4634 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4635 os::Solaris::set_cond_init(::cond_init); 4636 os::Solaris::set_cond_destroy(::cond_destroy); 4637 } 4638 } 4639} 4640 4641bool os::Solaris::liblgrp_init() { 4642 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4643 if (handle != NULL) { 4644 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4645 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4646 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4647 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4648 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4649 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4650 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4651 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4652 dlsym(handle, "lgrp_cookie_stale"))); 4653 4654 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4655 set_lgrp_cookie(c); 4656 return true; 4657 } 4658 return false; 4659} 4660 4661void os::Solaris::misc_sym_init() { 4662 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4663 if(func == NULL) { 4664 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4665 } 4666 if (func != NULL) { 4667 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4668 } 4669} 4670 4671// Symbol doesn't exist in Solaris 8 pset.h 4672#ifndef PS_MYID 4673#define PS_MYID -3 4674#endif 4675 4676// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4677typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4678static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4679 4680void init_pset_getloadavg_ptr(void) { 4681 pset_getloadavg_ptr = 4682 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4683 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4684 warning("pset_getloadavg function not found"); 4685 } 4686} 4687 4688int os::Solaris::_dev_zero_fd = -1; 4689 4690// this is called _before_ the global arguments have been parsed 4691void os::init(void) { 4692 _initial_pid = getpid(); 4693 4694 max_hrtime = first_hrtime = gethrtime(); 4695 4696 init_random(1234567); 4697 4698 page_size = sysconf(_SC_PAGESIZE); 4699 if (page_size == -1) 4700 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4701 init_page_sizes((size_t) page_size); 4702 4703 Solaris::initialize_system_info(); 4704 4705 int fd = open("/dev/zero", O_RDWR); 4706 if (fd < 0) { 4707 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4708 } else { 4709 Solaris::set_dev_zero_fd(fd); 4710 4711 // Close on exec, child won't inherit. 4712 fcntl(fd, F_SETFD, FD_CLOEXEC); 4713 } 4714 4715 clock_tics_per_sec = CLK_TCK; 4716 4717 // check if dladdr1() exists; dladdr1 can provide more information than 4718 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4719 // and is available on linker patches for 5.7 and 5.8. 4720 // libdl.so must have been loaded, this call is just an entry lookup 4721 void * hdl = dlopen("libdl.so", RTLD_NOW); 4722 if (hdl) 4723 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4724 4725 // (Solaris only) this switches to calls that actually do locking. 4726 ThreadCritical::initialize(); 4727 4728 main_thread = thr_self(); 4729 4730 // Constant minimum stack size allowed. It must be at least 4731 // the minimum of what the OS supports (thr_min_stack()), and 4732 // enough to allow the thread to get to user bytecode execution. 4733 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4734 // If the pagesize of the VM is greater than 8K determine the appropriate 4735 // number of initial guard pages. The user can change this with the 4736 // command line arguments, if needed. 4737 if (vm_page_size() > 8*K) { 4738 StackYellowPages = 1; 4739 StackRedPages = 1; 4740 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4741 } 4742} 4743 4744// To install functions for atexit system call 4745extern "C" { 4746 static void perfMemory_exit_helper() { 4747 perfMemory_exit(); 4748 } 4749} 4750 4751// this is called _after_ the global arguments have been parsed 4752jint os::init_2(void) { 4753 // try to enable extended file IO ASAP, see 6431278 4754 os::Solaris::try_enable_extended_io(); 4755 4756 // Allocate a single page and mark it as readable for safepoint polling. Also 4757 // use this first mmap call to check support for MAP_ALIGN. 4758 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4759 page_size, 4760 MAP_PRIVATE | MAP_ALIGN, 4761 PROT_READ); 4762 if (polling_page == NULL) { 4763 has_map_align = false; 4764 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4765 PROT_READ); 4766 } 4767 4768 os::set_polling_page(polling_page); 4769 4770#ifndef PRODUCT 4771 if( Verbose && PrintMiscellaneous ) 4772 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4773#endif 4774 4775 if (!UseMembar) { 4776 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4777 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4778 os::set_memory_serialize_page( mem_serialize_page ); 4779 4780#ifndef PRODUCT 4781 if(Verbose && PrintMiscellaneous) 4782 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4783#endif 4784} 4785 4786 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4787 4788 // Check minimum allowable stack size for thread creation and to initialize 4789 // the java system classes, including StackOverflowError - depends on page 4790 // size. Add a page for compiler2 recursion in main thread. 4791 // Add in BytesPerWord times page size to account for VM stack during 4792 // class initialization depending on 32 or 64 bit VM. 4793 guarantee((Solaris::min_stack_allowed >= 4794 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4795 COMPILER2_PRESENT(+1)) * page_size), 4796 "need to increase Solaris::min_stack_allowed on this platform"); 4797 4798 size_t threadStackSizeInBytes = ThreadStackSize * K; 4799 if (threadStackSizeInBytes != 0 && 4800 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4801 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4802 Solaris::min_stack_allowed/K); 4803 return JNI_ERR; 4804 } 4805 4806 // For 64kbps there will be a 64kb page size, which makes 4807 // the usable default stack size quite a bit less. Increase the 4808 // stack for 64kb (or any > than 8kb) pages, this increases 4809 // virtual memory fragmentation (since we're not creating the 4810 // stack on a power of 2 boundary. The real fix for this 4811 // should be to fix the guard page mechanism. 4812 4813 if (vm_page_size() > 8*K) { 4814 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4815 ? threadStackSizeInBytes + 4816 ((StackYellowPages + StackRedPages) * vm_page_size()) 4817 : 0; 4818 ThreadStackSize = threadStackSizeInBytes/K; 4819 } 4820 4821 // Make the stack size a multiple of the page size so that 4822 // the yellow/red zones can be guarded. 4823 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4824 vm_page_size())); 4825 4826 Solaris::libthread_init(); 4827 4828 if (UseNUMA) { 4829 if (!Solaris::liblgrp_init()) { 4830 UseNUMA = false; 4831 } else { 4832 size_t lgrp_limit = os::numa_get_groups_num(); 4833 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit); 4834 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4835 FREE_C_HEAP_ARRAY(int, lgrp_ids); 4836 if (lgrp_num < 2) { 4837 // There's only one locality group, disable NUMA. 4838 UseNUMA = false; 4839 } 4840 } 4841 if (!UseNUMA && ForceNUMA) { 4842 UseNUMA = true; 4843 } 4844 } 4845 4846 Solaris::misc_sym_init(); 4847 Solaris::signal_sets_init(); 4848 Solaris::init_signal_mem(); 4849 Solaris::install_signal_handlers(); 4850 4851 if (libjsigversion < JSIG_VERSION_1_4_1) { 4852 Maxlibjsigsigs = OLDMAXSIGNUM; 4853 } 4854 4855 // initialize synchronization primitives to use either thread or 4856 // lwp synchronization (controlled by UseLWPSynchronization) 4857 Solaris::synchronization_init(); 4858 4859 if (MaxFDLimit) { 4860 // set the number of file descriptors to max. print out error 4861 // if getrlimit/setrlimit fails but continue regardless. 4862 struct rlimit nbr_files; 4863 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4864 if (status != 0) { 4865 if (PrintMiscellaneous && (Verbose || WizardMode)) 4866 perror("os::init_2 getrlimit failed"); 4867 } else { 4868 nbr_files.rlim_cur = nbr_files.rlim_max; 4869 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4870 if (status != 0) { 4871 if (PrintMiscellaneous && (Verbose || WizardMode)) 4872 perror("os::init_2 setrlimit failed"); 4873 } 4874 } 4875 } 4876 4877 // Initialize HPI. 4878 jint hpi_result = hpi::initialize(); 4879 if (hpi_result != JNI_OK) { 4880 tty->print_cr("There was an error trying to initialize the HPI library."); 4881 return hpi_result; 4882 } 4883 4884 // Calculate theoretical max. size of Threads to guard gainst 4885 // artifical out-of-memory situations, where all available address- 4886 // space has been reserved by thread stacks. Default stack size is 1Mb. 4887 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4888 JavaThread::stack_size_at_create() : (1*K*K); 4889 assert(pre_thread_stack_size != 0, "Must have a stack"); 4890 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4891 // we should start doing Virtual Memory banging. Currently when the threads will 4892 // have used all but 200Mb of space. 4893 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4894 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4895 4896 // at-exit methods are called in the reverse order of their registration. 4897 // In Solaris 7 and earlier, atexit functions are called on return from 4898 // main or as a result of a call to exit(3C). There can be only 32 of 4899 // these functions registered and atexit() does not set errno. In Solaris 4900 // 8 and later, there is no limit to the number of functions registered 4901 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4902 // functions are called upon dlclose(3DL) in addition to return from main 4903 // and exit(3C). 4904 4905 if (PerfAllowAtExitRegistration) { 4906 // only register atexit functions if PerfAllowAtExitRegistration is set. 4907 // atexit functions can be delayed until process exit time, which 4908 // can be problematic for embedded VM situations. Embedded VMs should 4909 // call DestroyJavaVM() to assure that VM resources are released. 4910 4911 // note: perfMemory_exit_helper atexit function may be removed in 4912 // the future if the appropriate cleanup code can be added to the 4913 // VM_Exit VMOperation's doit method. 4914 if (atexit(perfMemory_exit_helper) != 0) { 4915 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4916 } 4917 } 4918 4919 // Init pset_loadavg function pointer 4920 init_pset_getloadavg_ptr(); 4921 4922 return JNI_OK; 4923} 4924 4925 4926// Mark the polling page as unreadable 4927void os::make_polling_page_unreadable(void) { 4928 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4929 fatal("Could not disable polling page"); 4930}; 4931 4932// Mark the polling page as readable 4933void os::make_polling_page_readable(void) { 4934 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4935 fatal("Could not enable polling page"); 4936}; 4937 4938// OS interface. 4939 4940int os::stat(const char *path, struct stat *sbuf) { 4941 char pathbuf[MAX_PATH]; 4942 if (strlen(path) > MAX_PATH - 1) { 4943 errno = ENAMETOOLONG; 4944 return -1; 4945 } 4946 hpi::native_path(strcpy(pathbuf, path)); 4947 return ::stat(pathbuf, sbuf); 4948} 4949 4950 4951bool os::check_heap(bool force) { return true; } 4952 4953typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4954static vsnprintf_t sol_vsnprintf = NULL; 4955 4956int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4957 if (!sol_vsnprintf) { 4958 //search for the named symbol in the objects that were loaded after libjvm 4959 void* where = RTLD_NEXT; 4960 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4961 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4962 if (!sol_vsnprintf){ 4963 //search for the named symbol in the objects that were loaded before libjvm 4964 where = RTLD_DEFAULT; 4965 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4966 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4967 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4968 } 4969 } 4970 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4971} 4972 4973 4974// Is a (classpath) directory empty? 4975bool os::dir_is_empty(const char* path) { 4976 DIR *dir = NULL; 4977 struct dirent *ptr; 4978 4979 dir = opendir(path); 4980 if (dir == NULL) return true; 4981 4982 /* Scan the directory */ 4983 bool result = true; 4984 char buf[sizeof(struct dirent) + MAX_PATH]; 4985 struct dirent *dbuf = (struct dirent *) buf; 4986 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4987 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4988 result = false; 4989 } 4990 } 4991 closedir(dir); 4992 return result; 4993} 4994 4995// create binary file, rewriting existing file if required 4996int os::create_binary_file(const char* path, bool rewrite_existing) { 4997 int oflags = O_WRONLY | O_CREAT; 4998 if (!rewrite_existing) { 4999 oflags |= O_EXCL; 5000 } 5001 return ::open64(path, oflags, S_IREAD | S_IWRITE); 5002} 5003 5004// return current position of file pointer 5005jlong os::current_file_offset(int fd) { 5006 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 5007} 5008 5009// move file pointer to the specified offset 5010jlong os::seek_to_file_offset(int fd, jlong offset) { 5011 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 5012} 5013 5014// Map a block of memory. 5015char* os::map_memory(int fd, const char* file_name, size_t file_offset, 5016 char *addr, size_t bytes, bool read_only, 5017 bool allow_exec) { 5018 int prot; 5019 int flags; 5020 5021 if (read_only) { 5022 prot = PROT_READ; 5023 flags = MAP_SHARED; 5024 } else { 5025 prot = PROT_READ | PROT_WRITE; 5026 flags = MAP_PRIVATE; 5027 } 5028 5029 if (allow_exec) { 5030 prot |= PROT_EXEC; 5031 } 5032 5033 if (addr != NULL) { 5034 flags |= MAP_FIXED; 5035 } 5036 5037 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5038 fd, file_offset); 5039 if (mapped_address == MAP_FAILED) { 5040 return NULL; 5041 } 5042 return mapped_address; 5043} 5044 5045 5046// Remap a block of memory. 5047char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 5048 char *addr, size_t bytes, bool read_only, 5049 bool allow_exec) { 5050 // same as map_memory() on this OS 5051 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5052 allow_exec); 5053} 5054 5055 5056// Unmap a block of memory. 5057bool os::unmap_memory(char* addr, size_t bytes) { 5058 return munmap(addr, bytes) == 0; 5059} 5060 5061void os::pause() { 5062 char filename[MAX_PATH]; 5063 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5064 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5065 } else { 5066 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5067 } 5068 5069 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5070 if (fd != -1) { 5071 struct stat buf; 5072 close(fd); 5073 while (::stat(filename, &buf) == 0) { 5074 (void)::poll(NULL, 0, 100); 5075 } 5076 } else { 5077 jio_fprintf(stderr, 5078 "Could not open pause file '%s', continuing immediately.\n", filename); 5079 } 5080} 5081 5082#ifndef PRODUCT 5083#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5084// Turn this on if you need to trace synch operations. 5085// Set RECORD_SYNCH_LIMIT to a large-enough value, 5086// and call record_synch_enable and record_synch_disable 5087// around the computation of interest. 5088 5089void record_synch(char* name, bool returning); // defined below 5090 5091class RecordSynch { 5092 char* _name; 5093 public: 5094 RecordSynch(char* name) :_name(name) 5095 { record_synch(_name, false); } 5096 ~RecordSynch() { record_synch(_name, true); } 5097}; 5098 5099#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5100extern "C" ret name params { \ 5101 typedef ret name##_t params; \ 5102 static name##_t* implem = NULL; \ 5103 static int callcount = 0; \ 5104 if (implem == NULL) { \ 5105 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5106 if (implem == NULL) fatal(dlerror()); \ 5107 } \ 5108 ++callcount; \ 5109 RecordSynch _rs(#name); \ 5110 inner; \ 5111 return implem args; \ 5112} 5113// in dbx, examine callcounts this way: 5114// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5115 5116#define CHECK_POINTER_OK(p) \ 5117 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5118#define CHECK_MU \ 5119 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5120#define CHECK_CV \ 5121 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5122#define CHECK_P(p) \ 5123 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5124 5125#define CHECK_MUTEX(mutex_op) \ 5126CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5127 5128CHECK_MUTEX( mutex_lock) 5129CHECK_MUTEX( _mutex_lock) 5130CHECK_MUTEX( mutex_unlock) 5131CHECK_MUTEX(_mutex_unlock) 5132CHECK_MUTEX( mutex_trylock) 5133CHECK_MUTEX(_mutex_trylock) 5134 5135#define CHECK_COND(cond_op) \ 5136CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5137 5138CHECK_COND( cond_wait); 5139CHECK_COND(_cond_wait); 5140CHECK_COND(_cond_wait_cancel); 5141 5142#define CHECK_COND2(cond_op) \ 5143CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5144 5145CHECK_COND2( cond_timedwait); 5146CHECK_COND2(_cond_timedwait); 5147CHECK_COND2(_cond_timedwait_cancel); 5148 5149// do the _lwp_* versions too 5150#define mutex_t lwp_mutex_t 5151#define cond_t lwp_cond_t 5152CHECK_MUTEX( _lwp_mutex_lock) 5153CHECK_MUTEX( _lwp_mutex_unlock) 5154CHECK_MUTEX( _lwp_mutex_trylock) 5155CHECK_MUTEX( __lwp_mutex_lock) 5156CHECK_MUTEX( __lwp_mutex_unlock) 5157CHECK_MUTEX( __lwp_mutex_trylock) 5158CHECK_MUTEX(___lwp_mutex_lock) 5159CHECK_MUTEX(___lwp_mutex_unlock) 5160 5161CHECK_COND( _lwp_cond_wait); 5162CHECK_COND( __lwp_cond_wait); 5163CHECK_COND(___lwp_cond_wait); 5164 5165CHECK_COND2( _lwp_cond_timedwait); 5166CHECK_COND2( __lwp_cond_timedwait); 5167#undef mutex_t 5168#undef cond_t 5169 5170CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5171CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5172CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5173CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5174CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5175CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5176CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5177CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5178 5179 5180// recording machinery: 5181 5182enum { RECORD_SYNCH_LIMIT = 200 }; 5183char* record_synch_name[RECORD_SYNCH_LIMIT]; 5184void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5185bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5186thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5187int record_synch_count = 0; 5188bool record_synch_enabled = false; 5189 5190// in dbx, examine recorded data this way: 5191// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5192 5193void record_synch(char* name, bool returning) { 5194 if (record_synch_enabled) { 5195 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5196 record_synch_name[record_synch_count] = name; 5197 record_synch_returning[record_synch_count] = returning; 5198 record_synch_thread[record_synch_count] = thr_self(); 5199 record_synch_arg0ptr[record_synch_count] = &name; 5200 record_synch_count++; 5201 } 5202 // put more checking code here: 5203 // ... 5204 } 5205} 5206 5207void record_synch_enable() { 5208 // start collecting trace data, if not already doing so 5209 if (!record_synch_enabled) record_synch_count = 0; 5210 record_synch_enabled = true; 5211} 5212 5213void record_synch_disable() { 5214 // stop collecting trace data 5215 record_synch_enabled = false; 5216} 5217 5218#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5219#endif // PRODUCT 5220 5221const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5222const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5223 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5224 5225 5226// JVMTI & JVM monitoring and management support 5227// The thread_cpu_time() and current_thread_cpu_time() are only 5228// supported if is_thread_cpu_time_supported() returns true. 5229// They are not supported on Solaris T1. 5230 5231// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5232// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5233// of a thread. 5234// 5235// current_thread_cpu_time() and thread_cpu_time(Thread *) 5236// returns the fast estimate available on the platform. 5237 5238// hrtime_t gethrvtime() return value includes 5239// user time but does not include system time 5240jlong os::current_thread_cpu_time() { 5241 return (jlong) gethrvtime(); 5242} 5243 5244jlong os::thread_cpu_time(Thread *thread) { 5245 // return user level CPU time only to be consistent with 5246 // what current_thread_cpu_time returns. 5247 // thread_cpu_time_info() must be changed if this changes 5248 return os::thread_cpu_time(thread, false /* user time only */); 5249} 5250 5251jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5252 if (user_sys_cpu_time) { 5253 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5254 } else { 5255 return os::current_thread_cpu_time(); 5256 } 5257} 5258 5259jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5260 char proc_name[64]; 5261 int count; 5262 prusage_t prusage; 5263 jlong lwp_time; 5264 int fd; 5265 5266 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5267 getpid(), 5268 thread->osthread()->lwp_id()); 5269 fd = open(proc_name, O_RDONLY); 5270 if ( fd == -1 ) return -1; 5271 5272 do { 5273 count = pread(fd, 5274 (void *)&prusage.pr_utime, 5275 thr_time_size, 5276 thr_time_off); 5277 } while (count < 0 && errno == EINTR); 5278 close(fd); 5279 if ( count < 0 ) return -1; 5280 5281 if (user_sys_cpu_time) { 5282 // user + system CPU time 5283 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5284 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5285 (jlong)prusage.pr_stime.tv_nsec + 5286 (jlong)prusage.pr_utime.tv_nsec; 5287 } else { 5288 // user level CPU time only 5289 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5290 (jlong)prusage.pr_utime.tv_nsec; 5291 } 5292 5293 return(lwp_time); 5294} 5295 5296void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5297 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5298 info_ptr->may_skip_backward = false; // elapsed time not wall time 5299 info_ptr->may_skip_forward = false; // elapsed time not wall time 5300 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5301} 5302 5303void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5304 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5305 info_ptr->may_skip_backward = false; // elapsed time not wall time 5306 info_ptr->may_skip_forward = false; // elapsed time not wall time 5307 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5308} 5309 5310bool os::is_thread_cpu_time_supported() { 5311 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5312 return true; 5313 } else { 5314 return false; 5315 } 5316} 5317 5318// System loadavg support. Returns -1 if load average cannot be obtained. 5319// Return the load average for our processor set if the primitive exists 5320// (Solaris 9 and later). Otherwise just return system wide loadavg. 5321int os::loadavg(double loadavg[], int nelem) { 5322 if (pset_getloadavg_ptr != NULL) { 5323 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5324 } else { 5325 return ::getloadavg(loadavg, nelem); 5326 } 5327} 5328 5329//--------------------------------------------------------------------------------- 5330#ifndef PRODUCT 5331 5332static address same_page(address x, address y) { 5333 intptr_t page_bits = -os::vm_page_size(); 5334 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5335 return x; 5336 else if (x > y) 5337 return (address)(intptr_t(y) | ~page_bits) + 1; 5338 else 5339 return (address)(intptr_t(y) & page_bits); 5340} 5341 5342bool os::find(address addr) { 5343 Dl_info dlinfo; 5344 memset(&dlinfo, 0, sizeof(dlinfo)); 5345 if (dladdr(addr, &dlinfo)) { 5346#ifdef _LP64 5347 tty->print("0x%016lx: ", addr); 5348#else 5349 tty->print("0x%08x: ", addr); 5350#endif 5351 if (dlinfo.dli_sname != NULL) 5352 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5353 else if (dlinfo.dli_fname) 5354 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5355 else 5356 tty->print("<absolute address>"); 5357 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5358#ifdef _LP64 5359 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5360#else 5361 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5362#endif 5363 tty->cr(); 5364 5365 if (Verbose) { 5366 // decode some bytes around the PC 5367 address begin = same_page(addr-40, addr); 5368 address end = same_page(addr+40, addr); 5369 address lowest = (address) dlinfo.dli_sname; 5370 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5371 if (begin < lowest) begin = lowest; 5372 Dl_info dlinfo2; 5373 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5374 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5375 end = (address) dlinfo2.dli_saddr; 5376 Disassembler::decode(begin, end); 5377 } 5378 return true; 5379 } 5380 return false; 5381} 5382 5383#endif 5384 5385 5386// Following function has been added to support HotSparc's libjvm.so running 5387// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5388// src/solaris/hpi/native_threads in the EVM codebase. 5389// 5390// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5391// libraries and should thus be removed. We will leave it behind for a while 5392// until we no longer want to able to run on top of 1.3.0 Solaris production 5393// JDK. See 4341971. 5394 5395#define STACK_SLACK 0x800 5396 5397extern "C" { 5398 intptr_t sysThreadAvailableStackWithSlack() { 5399 stack_t st; 5400 intptr_t retval, stack_top; 5401 retval = thr_stksegment(&st); 5402 assert(retval == 0, "incorrect return value from thr_stksegment"); 5403 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5404 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5405 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5406 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5407 } 5408} 5409 5410// Just to get the Kernel build to link on solaris for testing. 5411 5412extern "C" { 5413class ASGCT_CallTrace; 5414void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5415 KERNEL_RETURN; 5416} 5417 5418 5419// ObjectMonitor park-unpark infrastructure ... 5420// 5421// We implement Solaris and Linux PlatformEvents with the 5422// obvious condvar-mutex-flag triple. 5423// Another alternative that works quite well is pipes: 5424// Each PlatformEvent consists of a pipe-pair. 5425// The thread associated with the PlatformEvent 5426// calls park(), which reads from the input end of the pipe. 5427// Unpark() writes into the other end of the pipe. 5428// The write-side of the pipe must be set NDELAY. 5429// Unfortunately pipes consume a large # of handles. 5430// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5431// Using pipes for the 1st few threads might be workable, however. 5432// 5433// park() is permitted to return spuriously. 5434// Callers of park() should wrap the call to park() in 5435// an appropriate loop. A litmus test for the correct 5436// usage of park is the following: if park() were modified 5437// to immediately return 0 your code should still work, 5438// albeit degenerating to a spin loop. 5439// 5440// An interesting optimization for park() is to use a trylock() 5441// to attempt to acquire the mutex. If the trylock() fails 5442// then we know that a concurrent unpark() operation is in-progress. 5443// in that case the park() code could simply set _count to 0 5444// and return immediately. The subsequent park() operation *might* 5445// return immediately. That's harmless as the caller of park() is 5446// expected to loop. By using trylock() we will have avoided a 5447// avoided a context switch caused by contention on the per-thread mutex. 5448// 5449// TODO-FIXME: 5450// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5451// objectmonitor implementation. 5452// 2. Collapse the JSR166 parker event, and the 5453// objectmonitor ParkEvent into a single "Event" construct. 5454// 3. In park() and unpark() add: 5455// assert (Thread::current() == AssociatedWith). 5456// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5457// 1-out-of-N park() operations will return immediately. 5458// 5459// _Event transitions in park() 5460// -1 => -1 : illegal 5461// 1 => 0 : pass - return immediately 5462// 0 => -1 : block 5463// 5464// _Event serves as a restricted-range semaphore. 5465// 5466// Another possible encoding of _Event would be with 5467// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5468// 5469// TODO-FIXME: add DTRACE probes for: 5470// 1. Tx parks 5471// 2. Ty unparks Tx 5472// 3. Tx resumes from park 5473 5474 5475// value determined through experimentation 5476#define ROUNDINGFIX 11 5477 5478// utility to compute the abstime argument to timedwait. 5479// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5480 5481static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5482 // millis is the relative timeout time 5483 // abstime will be the absolute timeout time 5484 if (millis < 0) millis = 0; 5485 struct timeval now; 5486 int status = gettimeofday(&now, NULL); 5487 assert(status == 0, "gettimeofday"); 5488 jlong seconds = millis / 1000; 5489 jlong max_wait_period; 5490 5491 if (UseLWPSynchronization) { 5492 // forward port of fix for 4275818 (not sleeping long enough) 5493 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5494 // _lwp_cond_timedwait() used a round_down algorithm rather 5495 // than a round_up. For millis less than our roundfactor 5496 // it rounded down to 0 which doesn't meet the spec. 5497 // For millis > roundfactor we may return a bit sooner, but 5498 // since we can not accurately identify the patch level and 5499 // this has already been fixed in Solaris 9 and 8 we will 5500 // leave it alone rather than always rounding down. 5501 5502 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5503 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5504 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5505 max_wait_period = 21000000; 5506 } else { 5507 max_wait_period = 50000000; 5508 } 5509 millis %= 1000; 5510 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5511 seconds = max_wait_period; 5512 } 5513 abstime->tv_sec = now.tv_sec + seconds; 5514 long usec = now.tv_usec + millis * 1000; 5515 if (usec >= 1000000) { 5516 abstime->tv_sec += 1; 5517 usec -= 1000000; 5518 } 5519 abstime->tv_nsec = usec * 1000; 5520 return abstime; 5521} 5522 5523// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5524// Conceptually TryPark() should be equivalent to park(0). 5525 5526int os::PlatformEvent::TryPark() { 5527 for (;;) { 5528 const int v = _Event ; 5529 guarantee ((v == 0) || (v == 1), "invariant") ; 5530 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5531 } 5532} 5533 5534void os::PlatformEvent::park() { // AKA: down() 5535 // Invariant: Only the thread associated with the Event/PlatformEvent 5536 // may call park(). 5537 int v ; 5538 for (;;) { 5539 v = _Event ; 5540 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5541 } 5542 guarantee (v >= 0, "invariant") ; 5543 if (v == 0) { 5544 // Do this the hard way by blocking ... 5545 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5546 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5547 // Only for SPARC >= V8PlusA 5548#if defined(__sparc) && defined(COMPILER2) 5549 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5550#endif 5551 int status = os::Solaris::mutex_lock(_mutex); 5552 assert_status(status == 0, status, "mutex_lock"); 5553 guarantee (_nParked == 0, "invariant") ; 5554 ++ _nParked ; 5555 while (_Event < 0) { 5556 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5557 // Treat this the same as if the wait was interrupted 5558 // With usr/lib/lwp going to kernel, always handle ETIME 5559 status = os::Solaris::cond_wait(_cond, _mutex); 5560 if (status == ETIME) status = EINTR ; 5561 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5562 } 5563 -- _nParked ; 5564 _Event = 0 ; 5565 status = os::Solaris::mutex_unlock(_mutex); 5566 assert_status(status == 0, status, "mutex_unlock"); 5567 } 5568} 5569 5570int os::PlatformEvent::park(jlong millis) { 5571 guarantee (_nParked == 0, "invariant") ; 5572 int v ; 5573 for (;;) { 5574 v = _Event ; 5575 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5576 } 5577 guarantee (v >= 0, "invariant") ; 5578 if (v != 0) return OS_OK ; 5579 5580 int ret = OS_TIMEOUT; 5581 timestruc_t abst; 5582 compute_abstime (&abst, millis); 5583 5584 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5585 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5586 // Only for SPARC >= V8PlusA 5587#if defined(__sparc) && defined(COMPILER2) 5588 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5589#endif 5590 int status = os::Solaris::mutex_lock(_mutex); 5591 assert_status(status == 0, status, "mutex_lock"); 5592 guarantee (_nParked == 0, "invariant") ; 5593 ++ _nParked ; 5594 while (_Event < 0) { 5595 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5596 assert_status(status == 0 || status == EINTR || 5597 status == ETIME || status == ETIMEDOUT, 5598 status, "cond_timedwait"); 5599 if (!FilterSpuriousWakeups) break ; // previous semantics 5600 if (status == ETIME || status == ETIMEDOUT) break ; 5601 // We consume and ignore EINTR and spurious wakeups. 5602 } 5603 -- _nParked ; 5604 if (_Event >= 0) ret = OS_OK ; 5605 _Event = 0 ; 5606 status = os::Solaris::mutex_unlock(_mutex); 5607 assert_status(status == 0, status, "mutex_unlock"); 5608 return ret; 5609} 5610 5611void os::PlatformEvent::unpark() { 5612 int v, AnyWaiters; 5613 5614 // Increment _Event. 5615 // Another acceptable implementation would be to simply swap 1 5616 // into _Event: 5617 // if (Swap (&_Event, 1) < 0) { 5618 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5619 // if (AnyWaiters) cond_signal (_cond) ; 5620 // } 5621 5622 for (;;) { 5623 v = _Event ; 5624 if (v > 0) { 5625 // The LD of _Event could have reordered or be satisfied 5626 // by a read-aside from this processor's write buffer. 5627 // To avoid problems execute a barrier and then 5628 // ratify the value. A degenerate CAS() would also work. 5629 // Viz., CAS (v+0, &_Event, v) == v). 5630 OrderAccess::fence() ; 5631 if (_Event == v) return ; 5632 continue ; 5633 } 5634 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5635 } 5636 5637 // If the thread associated with the event was parked, wake it. 5638 if (v < 0) { 5639 int status ; 5640 // Wait for the thread assoc with the PlatformEvent to vacate. 5641 status = os::Solaris::mutex_lock(_mutex); 5642 assert_status(status == 0, status, "mutex_lock"); 5643 AnyWaiters = _nParked ; 5644 status = os::Solaris::mutex_unlock(_mutex); 5645 assert_status(status == 0, status, "mutex_unlock"); 5646 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5647 if (AnyWaiters != 0) { 5648 // We intentional signal *after* dropping the lock 5649 // to avoid a common class of futile wakeups. 5650 status = os::Solaris::cond_signal(_cond); 5651 assert_status(status == 0, status, "cond_signal"); 5652 } 5653 } 5654} 5655 5656// JSR166 5657// ------------------------------------------------------- 5658 5659/* 5660 * The solaris and linux implementations of park/unpark are fairly 5661 * conservative for now, but can be improved. They currently use a 5662 * mutex/condvar pair, plus _counter. 5663 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5664 * sets count to 1 and signals condvar. Only one thread ever waits 5665 * on the condvar. Contention seen when trying to park implies that someone 5666 * is unparking you, so don't wait. And spurious returns are fine, so there 5667 * is no need to track notifications. 5668 */ 5669 5670#define NANOSECS_PER_SEC 1000000000 5671#define NANOSECS_PER_MILLISEC 1000000 5672#define MAX_SECS 100000000 5673 5674/* 5675 * This code is common to linux and solaris and will be moved to a 5676 * common place in dolphin. 5677 * 5678 * The passed in time value is either a relative time in nanoseconds 5679 * or an absolute time in milliseconds. Either way it has to be unpacked 5680 * into suitable seconds and nanoseconds components and stored in the 5681 * given timespec structure. 5682 * Given time is a 64-bit value and the time_t used in the timespec is only 5683 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5684 * overflow if times way in the future are given. Further on Solaris versions 5685 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5686 * number of seconds, in abstime, is less than current_time + 100,000,000. 5687 * As it will be 28 years before "now + 100000000" will overflow we can 5688 * ignore overflow and just impose a hard-limit on seconds using the value 5689 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5690 * years from "now". 5691 */ 5692static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5693 assert (time > 0, "convertTime"); 5694 5695 struct timeval now; 5696 int status = gettimeofday(&now, NULL); 5697 assert(status == 0, "gettimeofday"); 5698 5699 time_t max_secs = now.tv_sec + MAX_SECS; 5700 5701 if (isAbsolute) { 5702 jlong secs = time / 1000; 5703 if (secs > max_secs) { 5704 absTime->tv_sec = max_secs; 5705 } 5706 else { 5707 absTime->tv_sec = secs; 5708 } 5709 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5710 } 5711 else { 5712 jlong secs = time / NANOSECS_PER_SEC; 5713 if (secs >= MAX_SECS) { 5714 absTime->tv_sec = max_secs; 5715 absTime->tv_nsec = 0; 5716 } 5717 else { 5718 absTime->tv_sec = now.tv_sec + secs; 5719 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5720 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5721 absTime->tv_nsec -= NANOSECS_PER_SEC; 5722 ++absTime->tv_sec; // note: this must be <= max_secs 5723 } 5724 } 5725 } 5726 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5727 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5728 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5729 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5730} 5731 5732void Parker::park(bool isAbsolute, jlong time) { 5733 5734 // Optional fast-path check: 5735 // Return immediately if a permit is available. 5736 if (_counter > 0) { 5737 _counter = 0 ; 5738 return ; 5739 } 5740 5741 // Optional fast-exit: Check interrupt before trying to wait 5742 Thread* thread = Thread::current(); 5743 assert(thread->is_Java_thread(), "Must be JavaThread"); 5744 JavaThread *jt = (JavaThread *)thread; 5745 if (Thread::is_interrupted(thread, false)) { 5746 return; 5747 } 5748 5749 // First, demultiplex/decode time arguments 5750 timespec absTime; 5751 if (time < 0) { // don't wait at all 5752 return; 5753 } 5754 if (time > 0) { 5755 // Warning: this code might be exposed to the old Solaris time 5756 // round-down bugs. Grep "roundingFix" for details. 5757 unpackTime(&absTime, isAbsolute, time); 5758 } 5759 5760 // Enter safepoint region 5761 // Beware of deadlocks such as 6317397. 5762 // The per-thread Parker:: _mutex is a classic leaf-lock. 5763 // In particular a thread must never block on the Threads_lock while 5764 // holding the Parker:: mutex. If safepoints are pending both the 5765 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5766 ThreadBlockInVM tbivm(jt); 5767 5768 // Don't wait if cannot get lock since interference arises from 5769 // unblocking. Also. check interrupt before trying wait 5770 if (Thread::is_interrupted(thread, false) || 5771 os::Solaris::mutex_trylock(_mutex) != 0) { 5772 return; 5773 } 5774 5775 int status ; 5776 5777 if (_counter > 0) { // no wait needed 5778 _counter = 0; 5779 status = os::Solaris::mutex_unlock(_mutex); 5780 assert (status == 0, "invariant") ; 5781 return; 5782 } 5783 5784#ifdef ASSERT 5785 // Don't catch signals while blocked; let the running threads have the signals. 5786 // (This allows a debugger to break into the running thread.) 5787 sigset_t oldsigs; 5788 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5789 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5790#endif 5791 5792 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5793 jt->set_suspend_equivalent(); 5794 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5795 5796 // Do this the hard way by blocking ... 5797 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5798 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5799 // Only for SPARC >= V8PlusA 5800#if defined(__sparc) && defined(COMPILER2) 5801 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5802#endif 5803 5804 if (time == 0) { 5805 status = os::Solaris::cond_wait (_cond, _mutex) ; 5806 } else { 5807 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5808 } 5809 // Note that an untimed cond_wait() can sometimes return ETIME on older 5810 // versions of the Solaris. 5811 assert_status(status == 0 || status == EINTR || 5812 status == ETIME || status == ETIMEDOUT, 5813 status, "cond_timedwait"); 5814 5815#ifdef ASSERT 5816 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5817#endif 5818 _counter = 0 ; 5819 status = os::Solaris::mutex_unlock(_mutex); 5820 assert_status(status == 0, status, "mutex_unlock") ; 5821 5822 // If externally suspended while waiting, re-suspend 5823 if (jt->handle_special_suspend_equivalent_condition()) { 5824 jt->java_suspend_self(); 5825 } 5826 5827} 5828 5829void Parker::unpark() { 5830 int s, status ; 5831 status = os::Solaris::mutex_lock (_mutex) ; 5832 assert (status == 0, "invariant") ; 5833 s = _counter; 5834 _counter = 1; 5835 status = os::Solaris::mutex_unlock (_mutex) ; 5836 assert (status == 0, "invariant") ; 5837 5838 if (s < 1) { 5839 status = os::Solaris::cond_signal (_cond) ; 5840 assert (status == 0, "invariant") ; 5841 } 5842} 5843 5844extern char** environ; 5845 5846// Run the specified command in a separate process. Return its exit value, 5847// or -1 on failure (e.g. can't fork a new process). 5848// Unlike system(), this function can be called from signal handler. It 5849// doesn't block SIGINT et al. 5850int os::fork_and_exec(char* cmd) { 5851 char * argv[4]; 5852 argv[0] = (char *)"sh"; 5853 argv[1] = (char *)"-c"; 5854 argv[2] = cmd; 5855 argv[3] = NULL; 5856 5857 // fork is async-safe, fork1 is not so can't use in signal handler 5858 pid_t pid; 5859 Thread* t = ThreadLocalStorage::get_thread_slow(); 5860 if (t != NULL && t->is_inside_signal_handler()) { 5861 pid = fork(); 5862 } else { 5863 pid = fork1(); 5864 } 5865 5866 if (pid < 0) { 5867 // fork failed 5868 warning("fork failed: %s", strerror(errno)); 5869 return -1; 5870 5871 } else if (pid == 0) { 5872 // child process 5873 5874 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5875 execve("/usr/bin/sh", argv, environ); 5876 5877 // execve failed 5878 _exit(-1); 5879 5880 } else { 5881 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5882 // care about the actual exit code, for now. 5883 5884 int status; 5885 5886 // Wait for the child process to exit. This returns immediately if 5887 // the child has already exited. */ 5888 while (waitpid(pid, &status, 0) < 0) { 5889 switch (errno) { 5890 case ECHILD: return 0; 5891 case EINTR: break; 5892 default: return -1; 5893 } 5894 } 5895 5896 if (WIFEXITED(status)) { 5897 // The child exited normally; get its exit code. 5898 return WEXITSTATUS(status); 5899 } else if (WIFSIGNALED(status)) { 5900 // The child exited because of a signal 5901 // The best value to return is 0x80 + signal number, 5902 // because that is what all Unix shells do, and because 5903 // it allows callers to distinguish between process exit and 5904 // process death by signal. 5905 return 0x80 + WTERMSIG(status); 5906 } else { 5907 // Unknown exit code; pass it through 5908 return status; 5909 } 5910 } 5911} 5912