os_solaris.cpp revision 268:d6340ab4105b
1/* 2 * Copyright 1997-2007 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? 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 467 if (pset != PS_NONE) { 468 uint_t pset_cpus; 469 // Query number of cpus in processor set 470 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 471 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 472 _processors_online = pset_cpus; 473 return pset_cpus; 474 } 475 } 476 } 477 // Otherwise return number of online cpus 478 return online_cpus; 479} 480 481static bool find_processors_in_pset(psetid_t pset, 482 processorid_t** id_array, 483 uint_t* id_length) { 484 bool result = false; 485 // Find the number of processors in the processor set. 486 if (pset_info(pset, NULL, id_length, NULL) == 0) { 487 // Make up an array to hold their ids. 488 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 489 // Fill in the array with their processor ids. 490 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 491 result = true; 492 } 493 } 494 return result; 495} 496 497// Callers of find_processors_online() must tolerate imprecise results -- 498// the system configuration can change asynchronously because of DR 499// or explicit psradm operations. 500// 501// We also need to take care that the loop (below) terminates as the 502// number of processors online can change between the _SC_NPROCESSORS_ONLN 503// request and the loop that builds the list of processor ids. Unfortunately 504// there's no reliable way to determine the maximum valid processor id, 505// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 506// man pages, which claim the processor id set is "sparse, but 507// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 508// exit the loop. 509// 510// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 511// not available on S8.0. 512 513static bool find_processors_online(processorid_t** id_array, 514 uint* id_length) { 515 const processorid_t MAX_PROCESSOR_ID = 100000 ; 516 // Find the number of processors online. 517 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 518 // Make up an array to hold their ids. 519 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 520 // Processors need not be numbered consecutively. 521 long found = 0; 522 processorid_t next = 0; 523 while (found < *id_length && next < MAX_PROCESSOR_ID) { 524 processor_info_t info; 525 if (processor_info(next, &info) == 0) { 526 // NB, PI_NOINTR processors are effectively online ... 527 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 528 (*id_array)[found] = next; 529 found += 1; 530 } 531 } 532 next += 1; 533 } 534 if (found < *id_length) { 535 // The loop above didn't identify the expected number of processors. 536 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 537 // and re-running the loop, above, but there's no guarantee of progress 538 // if the system configuration is in flux. Instead, we just return what 539 // we've got. Note that in the worst case find_processors_online() could 540 // return an empty set. (As a fall-back in the case of the empty set we 541 // could just return the ID of the current processor). 542 *id_length = found ; 543 } 544 545 return true; 546} 547 548static bool assign_distribution(processorid_t* id_array, 549 uint id_length, 550 uint* distribution, 551 uint distribution_length) { 552 // We assume we can assign processorid_t's to uint's. 553 assert(sizeof(processorid_t) == sizeof(uint), 554 "can't convert processorid_t to uint"); 555 // Quick check to see if we won't succeed. 556 if (id_length < distribution_length) { 557 return false; 558 } 559 // Assign processor ids to the distribution. 560 // Try to shuffle processors to distribute work across boards, 561 // assuming 4 processors per board. 562 const uint processors_per_board = ProcessDistributionStride; 563 // Find the maximum processor id. 564 processorid_t max_id = 0; 565 for (uint m = 0; m < id_length; m += 1) { 566 max_id = MAX2(max_id, id_array[m]); 567 } 568 // The next id, to limit loops. 569 const processorid_t limit_id = max_id + 1; 570 // Make up markers for available processors. 571 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 572 for (uint c = 0; c < limit_id; c += 1) { 573 available_id[c] = false; 574 } 575 for (uint a = 0; a < id_length; a += 1) { 576 available_id[id_array[a]] = true; 577 } 578 // Step by "boards", then by "slot", copying to "assigned". 579 // NEEDS_CLEANUP: The assignment of processors should be stateful, 580 // remembering which processors have been assigned by 581 // previous calls, etc., so as to distribute several 582 // independent calls of this method. What we'd like is 583 // It would be nice to have an API that let us ask 584 // how many processes are bound to a processor, 585 // but we don't have that, either. 586 // In the short term, "board" is static so that 587 // subsequent distributions don't all start at board 0. 588 static uint board = 0; 589 uint assigned = 0; 590 // Until we've found enough processors .... 591 while (assigned < distribution_length) { 592 // ... find the next available processor in the board. 593 for (uint slot = 0; slot < processors_per_board; slot += 1) { 594 uint try_id = board * processors_per_board + slot; 595 if ((try_id < limit_id) && (available_id[try_id] == true)) { 596 distribution[assigned] = try_id; 597 available_id[try_id] = false; 598 assigned += 1; 599 break; 600 } 601 } 602 board += 1; 603 if (board * processors_per_board + 0 >= limit_id) { 604 board = 0; 605 } 606 } 607 if (available_id != NULL) { 608 FREE_C_HEAP_ARRAY(bool, available_id); 609 } 610 return true; 611} 612 613bool os::distribute_processes(uint length, uint* distribution) { 614 bool result = false; 615 // Find the processor id's of all the available CPUs. 616 processorid_t* id_array = NULL; 617 uint id_length = 0; 618 // There are some races between querying information and using it, 619 // since processor sets can change dynamically. 620 psetid_t pset = PS_NONE; 621 // Are we running in a processor set? 622 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 623 result = find_processors_in_pset(pset, &id_array, &id_length); 624 } else { 625 result = find_processors_online(&id_array, &id_length); 626 } 627 if (result == true) { 628 if (id_length >= length) { 629 result = assign_distribution(id_array, id_length, distribution, length); 630 } else { 631 result = false; 632 } 633 } 634 if (id_array != NULL) { 635 FREE_C_HEAP_ARRAY(processorid_t, id_array); 636 } 637 return result; 638} 639 640bool os::bind_to_processor(uint processor_id) { 641 // We assume that a processorid_t can be stored in a uint. 642 assert(sizeof(uint) == sizeof(processorid_t), 643 "can't convert uint to processorid_t"); 644 int bind_result = 645 processor_bind(P_LWPID, // bind LWP. 646 P_MYID, // bind current LWP. 647 (processorid_t) processor_id, // id. 648 NULL); // don't return old binding. 649 return (bind_result == 0); 650} 651 652bool os::getenv(const char* name, char* buffer, int len) { 653 char* val = ::getenv( name ); 654 if ( val == NULL 655 || strlen(val) + 1 > len ) { 656 if (len > 0) buffer[0] = 0; // return a null string 657 return false; 658 } 659 strcpy( buffer, val ); 660 return true; 661} 662 663 664// Return true if user is running as root. 665 666bool os::have_special_privileges() { 667 static bool init = false; 668 static bool privileges = false; 669 if (!init) { 670 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 671 init = true; 672 } 673 return privileges; 674} 675 676 677static char* get_property(char* name, char* buffer, int buffer_size) { 678 if (os::getenv(name, buffer, buffer_size)) { 679 return buffer; 680 } 681 static char empty[] = ""; 682 return empty; 683} 684 685 686void os::init_system_properties_values() { 687 char arch[12]; 688 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 689 690 // The next steps are taken in the product version: 691 // 692 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 693 // This library should be located at: 694 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 695 // 696 // If "/jre/lib/" appears at the right place in the path, then we 697 // assume libjvm[_g].so is installed in a JDK and we use this path. 698 // 699 // Otherwise exit with message: "Could not create the Java virtual machine." 700 // 701 // The following extra steps are taken in the debugging version: 702 // 703 // If "/jre/lib/" does NOT appear at the right place in the path 704 // instead of exit check for $JAVA_HOME environment variable. 705 // 706 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 707 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 708 // it looks like libjvm[_g].so is installed there 709 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 710 // 711 // Otherwise exit. 712 // 713 // Important note: if the location of libjvm.so changes this 714 // code needs to be changed accordingly. 715 716 // The next few definitions allow the code to be verbatim: 717#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 718#define free(p) FREE_C_HEAP_ARRAY(char, p) 719#define getenv(n) ::getenv(n) 720 721#define EXTENSIONS_DIR "/lib/ext" 722#define ENDORSED_DIR "/lib/endorsed" 723#define COMMON_DIR "/usr/jdk/packages" 724 725 { 726 /* sysclasspath, java_home, dll_dir */ 727 { 728 char *home_path; 729 char *dll_path; 730 char *pslash; 731 char buf[MAXPATHLEN]; 732 os::jvm_path(buf, sizeof(buf)); 733 734 // Found the full path to libjvm.so. 735 // Now cut the path to <java_home>/jre if we can. 736 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 737 pslash = strrchr(buf, '/'); 738 if (pslash != NULL) 739 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 740 dll_path = malloc(strlen(buf) + 1); 741 if (dll_path == NULL) 742 return; 743 strcpy(dll_path, buf); 744 Arguments::set_dll_dir(dll_path); 745 746 if (pslash != NULL) { 747 pslash = strrchr(buf, '/'); 748 if (pslash != NULL) { 749 *pslash = '\0'; /* get rid of /<arch> */ 750 pslash = strrchr(buf, '/'); 751 if (pslash != NULL) 752 *pslash = '\0'; /* get rid of /lib */ 753 } 754 } 755 756 home_path = malloc(strlen(buf) + 1); 757 if (home_path == NULL) 758 return; 759 strcpy(home_path, buf); 760 Arguments::set_java_home(home_path); 761 762 if (!set_boot_path('/', ':')) 763 return; 764 } 765 766 /* 767 * Where to look for native libraries 768 */ 769 { 770 // Use dlinfo() to determine the correct java.library.path. 771 // 772 // If we're launched by the Java launcher, and the user 773 // does not set java.library.path explicitly on the commandline, 774 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 775 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 776 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 777 // /usr/lib), which is exactly what we want. 778 // 779 // If the user does set java.library.path, it completely 780 // overwrites this setting, and always has. 781 // 782 // If we're not launched by the Java launcher, we may 783 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 784 // settings. Again, dlinfo does exactly what we want. 785 786 Dl_serinfo _info, *info = &_info; 787 Dl_serpath *path; 788 char* library_path; 789 char *common_path; 790 int i; 791 792 // determine search path count and required buffer size 793 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 794 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 795 } 796 797 // allocate new buffer and initialize 798 info = (Dl_serinfo*)malloc(_info.dls_size); 799 if (info == NULL) { 800 vm_exit_out_of_memory(_info.dls_size, 801 "init_system_properties_values info"); 802 } 803 info->dls_size = _info.dls_size; 804 info->dls_cnt = _info.dls_cnt; 805 806 // obtain search path information 807 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 808 free(info); 809 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 810 } 811 812 path = &info->dls_serpath[0]; 813 814 // Note: Due to a legacy implementation, most of the library path 815 // is set in the launcher. This was to accomodate linking restrictions 816 // on legacy Solaris implementations (which are no longer supported). 817 // Eventually, all the library path setting will be done here. 818 // 819 // However, to prevent the proliferation of improperly built native 820 // libraries, the new path component /usr/jdk/packages is added here. 821 822 // Determine the actual CPU architecture. 823 char cpu_arch[12]; 824 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 825#ifdef _LP64 826 // If we are a 64-bit vm, perform the following translations: 827 // sparc -> sparcv9 828 // i386 -> amd64 829 if (strcmp(cpu_arch, "sparc") == 0) 830 strcat(cpu_arch, "v9"); 831 else if (strcmp(cpu_arch, "i386") == 0) 832 strcpy(cpu_arch, "amd64"); 833#endif 834 835 // Construct the invariant part of ld_library_path. Note that the 836 // space for the colon and the trailing null are provided by the 837 // nulls included by the sizeof operator. 838 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 839 common_path = malloc(bufsize); 840 if (common_path == NULL) { 841 free(info); 842 vm_exit_out_of_memory(bufsize, 843 "init_system_properties_values common_path"); 844 } 845 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 846 847 // struct size is more than sufficient for the path components obtained 848 // through the dlinfo() call, so only add additional space for the path 849 // components explicitly added here. 850 bufsize = info->dls_size + strlen(common_path); 851 library_path = malloc(bufsize); 852 if (library_path == NULL) { 853 free(info); 854 free(common_path); 855 vm_exit_out_of_memory(bufsize, 856 "init_system_properties_values library_path"); 857 } 858 library_path[0] = '\0'; 859 860 // Construct the desired Java library path from the linker's library 861 // search path. 862 // 863 // For compatibility, it is optimal that we insert the additional path 864 // components specific to the Java VM after those components specified 865 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 866 // infrastructure. 867 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 868 strcpy(library_path, common_path); 869 } else { 870 int inserted = 0; 871 for (i = 0; i < info->dls_cnt; i++, path++) { 872 uint_t flags = path->dls_flags & LA_SER_MASK; 873 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 874 strcat(library_path, common_path); 875 strcat(library_path, os::path_separator()); 876 inserted = 1; 877 } 878 strcat(library_path, path->dls_name); 879 strcat(library_path, os::path_separator()); 880 } 881 // eliminate trailing path separator 882 library_path[strlen(library_path)-1] = '\0'; 883 } 884 885 // happens before argument parsing - can't use a trace flag 886 // tty->print_raw("init_system_properties_values: native lib path: "); 887 // tty->print_raw_cr(library_path); 888 889 // callee copies into its own buffer 890 Arguments::set_library_path(library_path); 891 892 free(common_path); 893 free(library_path); 894 free(info); 895 } 896 897 /* 898 * Extensions directories. 899 * 900 * Note that the space for the colon and the trailing null are provided 901 * by the nulls included by the sizeof operator (so actually one byte more 902 * than necessary is allocated). 903 */ 904 { 905 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 906 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 907 sizeof(EXTENSIONS_DIR)); 908 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 909 Arguments::get_java_home()); 910 Arguments::set_ext_dirs(buf); 911 } 912 913 /* Endorsed standards default directory. */ 914 { 915 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 916 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 917 Arguments::set_endorsed_dirs(buf); 918 } 919 } 920 921#undef malloc 922#undef free 923#undef getenv 924#undef EXTENSIONS_DIR 925#undef ENDORSED_DIR 926#undef COMMON_DIR 927 928} 929 930void os::breakpoint() { 931 BREAKPOINT; 932} 933 934bool os::obsolete_option(const JavaVMOption *option) 935{ 936 if (!strncmp(option->optionString, "-Xt", 3)) { 937 return true; 938 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 941 return true; 942 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 943 return true; 944 } 945 return false; 946} 947 948bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 949 address stackStart = (address)thread->stack_base(); 950 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 951 if (sp < stackStart && sp >= stackEnd ) return true; 952 return false; 953} 954 955extern "C" void breakpoint() { 956 // use debugger to set breakpoint here 957} 958 959// Returns an estimate of the current stack pointer. Result must be guaranteed to 960// point into the calling threads stack, and be no lower than the current stack 961// pointer. 962address os::current_stack_pointer() { 963 volatile int dummy; 964 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 965 return sp; 966} 967 968static thread_t main_thread; 969 970// Thread start routine for all new Java threads 971extern "C" void* java_start(void* thread_addr) { 972 // Try to randomize the cache line index of hot stack frames. 973 // This helps when threads of the same stack traces evict each other's 974 // cache lines. The threads can be either from the same JVM instance, or 975 // from different JVM instances. The benefit is especially true for 976 // processors with hyperthreading technology. 977 static int counter = 0; 978 int pid = os::current_process_id(); 979 alloca(((pid ^ counter++) & 7) * 128); 980 981 int prio; 982 Thread* thread = (Thread*)thread_addr; 983 OSThread* osthr = thread->osthread(); 984 985 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 986 thread->_schedctl = (void *) schedctl_init () ; 987 988 if (UseNUMA) { 989 int lgrp_id = os::numa_get_group_id(); 990 if (lgrp_id != -1) { 991 thread->set_lgrp_id(lgrp_id); 992 } 993 } 994 995 // If the creator called set priority before we started, 996 // we need to call set priority now that we have an lwp. 997 // Get the priority from libthread and set the priority 998 // for the new Solaris lwp. 999 if ( osthr->thread_id() != -1 ) { 1000 if ( UseThreadPriorities ) { 1001 thr_getprio(osthr->thread_id(), &prio); 1002 if (ThreadPriorityVerbose) { 1003 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1004 osthr->thread_id(), osthr->lwp_id(), prio ); 1005 } 1006 os::set_native_priority(thread, prio); 1007 } 1008 } else if (ThreadPriorityVerbose) { 1009 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1010 } 1011 1012 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1013 1014 // initialize signal mask for this thread 1015 os::Solaris::hotspot_sigmask(thread); 1016 1017 thread->run(); 1018 1019 // One less thread is executing 1020 // When the VMThread gets here, the main thread may have already exited 1021 // which frees the CodeHeap containing the Atomic::dec code 1022 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1023 Atomic::dec(&os::Solaris::_os_thread_count); 1024 } 1025 1026 if (UseDetachedThreads) { 1027 thr_exit(NULL); 1028 ShouldNotReachHere(); 1029 } 1030 return NULL; 1031} 1032 1033static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1034 // Allocate the OSThread object 1035 OSThread* osthread = new OSThread(NULL, NULL); 1036 if (osthread == NULL) return NULL; 1037 1038 // Store info on the Solaris thread into the OSThread 1039 osthread->set_thread_id(thread_id); 1040 osthread->set_lwp_id(_lwp_self()); 1041 thread->_schedctl = (void *) schedctl_init () ; 1042 1043 if (UseNUMA) { 1044 int lgrp_id = os::numa_get_group_id(); 1045 if (lgrp_id != -1) { 1046 thread->set_lgrp_id(lgrp_id); 1047 } 1048 } 1049 1050 if ( ThreadPriorityVerbose ) { 1051 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1052 osthread->thread_id(), osthread->lwp_id() ); 1053 } 1054 1055 // Initial thread state is INITIALIZED, not SUSPENDED 1056 osthread->set_state(INITIALIZED); 1057 1058 return osthread; 1059} 1060 1061void os::Solaris::hotspot_sigmask(Thread* thread) { 1062 1063 //Save caller's signal mask 1064 sigset_t sigmask; 1065 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1066 OSThread *osthread = thread->osthread(); 1067 osthread->set_caller_sigmask(sigmask); 1068 1069 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1070 if (!ReduceSignalUsage) { 1071 if (thread->is_VM_thread()) { 1072 // Only the VM thread handles BREAK_SIGNAL ... 1073 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1074 } else { 1075 // ... all other threads block BREAK_SIGNAL 1076 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1077 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1078 } 1079 } 1080} 1081 1082bool os::create_attached_thread(JavaThread* thread) { 1083#ifdef ASSERT 1084 thread->verify_not_published(); 1085#endif 1086 OSThread* osthread = create_os_thread(thread, thr_self()); 1087 if (osthread == NULL) { 1088 return false; 1089 } 1090 1091 // Initial thread state is RUNNABLE 1092 osthread->set_state(RUNNABLE); 1093 thread->set_osthread(osthread); 1094 1095 // initialize signal mask for this thread 1096 // and save the caller's signal mask 1097 os::Solaris::hotspot_sigmask(thread); 1098 1099 return true; 1100} 1101 1102bool os::create_main_thread(JavaThread* thread) { 1103#ifdef ASSERT 1104 thread->verify_not_published(); 1105#endif 1106 if (_starting_thread == NULL) { 1107 _starting_thread = create_os_thread(thread, main_thread); 1108 if (_starting_thread == NULL) { 1109 return false; 1110 } 1111 } 1112 1113 // The primodial thread is runnable from the start 1114 _starting_thread->set_state(RUNNABLE); 1115 1116 thread->set_osthread(_starting_thread); 1117 1118 // initialize signal mask for this thread 1119 // and save the caller's signal mask 1120 os::Solaris::hotspot_sigmask(thread); 1121 1122 return true; 1123} 1124 1125// _T2_libthread is true if we believe we are running with the newer 1126// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1127bool os::Solaris::_T2_libthread = false; 1128 1129bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1130 // Allocate the OSThread object 1131 OSThread* osthread = new OSThread(NULL, NULL); 1132 if (osthread == NULL) { 1133 return false; 1134 } 1135 1136 if ( ThreadPriorityVerbose ) { 1137 char *thrtyp; 1138 switch ( thr_type ) { 1139 case vm_thread: 1140 thrtyp = (char *)"vm"; 1141 break; 1142 case cgc_thread: 1143 thrtyp = (char *)"cgc"; 1144 break; 1145 case pgc_thread: 1146 thrtyp = (char *)"pgc"; 1147 break; 1148 case java_thread: 1149 thrtyp = (char *)"java"; 1150 break; 1151 case compiler_thread: 1152 thrtyp = (char *)"compiler"; 1153 break; 1154 case watcher_thread: 1155 thrtyp = (char *)"watcher"; 1156 break; 1157 default: 1158 thrtyp = (char *)"unknown"; 1159 break; 1160 } 1161 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1162 } 1163 1164 // Calculate stack size if it's not specified by caller. 1165 if (stack_size == 0) { 1166 // The default stack size 1M (2M for LP64). 1167 stack_size = (BytesPerWord >> 2) * K * K; 1168 1169 switch (thr_type) { 1170 case os::java_thread: 1171 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1172 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1173 break; 1174 case os::compiler_thread: 1175 if (CompilerThreadStackSize > 0) { 1176 stack_size = (size_t)(CompilerThreadStackSize * K); 1177 break; 1178 } // else fall through: 1179 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1180 case os::vm_thread: 1181 case os::pgc_thread: 1182 case os::cgc_thread: 1183 case os::watcher_thread: 1184 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1185 break; 1186 } 1187 } 1188 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1189 1190 // Initial state is ALLOCATED but not INITIALIZED 1191 osthread->set_state(ALLOCATED); 1192 1193 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1194 // We got lots of threads. Check if we still have some address space left. 1195 // Need to be at least 5Mb of unreserved address space. We do check by 1196 // trying to reserve some. 1197 const size_t VirtualMemoryBangSize = 20*K*K; 1198 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1199 if (mem == NULL) { 1200 delete osthread; 1201 return false; 1202 } else { 1203 // Release the memory again 1204 os::release_memory(mem, VirtualMemoryBangSize); 1205 } 1206 } 1207 1208 // Setup osthread because the child thread may need it. 1209 thread->set_osthread(osthread); 1210 1211 // Create the Solaris thread 1212 // explicit THR_BOUND for T2_libthread case in case 1213 // that assumption is not accurate, but our alternate signal stack 1214 // handling is based on it which must have bound threads 1215 thread_t tid = 0; 1216 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1217 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1218 (thr_type == vm_thread) || 1219 (thr_type == cgc_thread) || 1220 (thr_type == pgc_thread) || 1221 (thr_type == compiler_thread && BackgroundCompilation)) ? 1222 THR_BOUND : 0); 1223 int status; 1224 1225 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1226 // 1227 // On multiprocessors systems, libthread sometimes under-provisions our 1228 // process with LWPs. On a 30-way systems, for instance, we could have 1229 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1230 // to our process. This can result in under utilization of PEs. 1231 // I suspect the problem is related to libthread's LWP 1232 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1233 // upcall policy. 1234 // 1235 // The following code is palliative -- it attempts to ensure that our 1236 // process has sufficient LWPs to take advantage of multiple PEs. 1237 // Proper long-term cures include using user-level threads bound to LWPs 1238 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1239 // slight timing window with respect to sampling _os_thread_count, but 1240 // the race is benign. Also, we should periodically recompute 1241 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1242 // the number of PEs in our partition. You might be tempted to use 1243 // THR_NEW_LWP here, but I'd recommend against it as that could 1244 // result in undesirable growth of the libthread's LWP pool. 1245 // The fix below isn't sufficient; for instance, it doesn't take into count 1246 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1247 // 1248 // Some pathologies this scheme doesn't handle: 1249 // * Threads can block, releasing the LWPs. The LWPs can age out. 1250 // When a large number of threads become ready again there aren't 1251 // enough LWPs available to service them. This can occur when the 1252 // number of ready threads oscillates. 1253 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1254 // 1255 // Finally, we should call thr_setconcurrency() periodically to refresh 1256 // the LWP pool and thwart the LWP age-out mechanism. 1257 // The "+3" term provides a little slop -- we want to slightly overprovision. 1258 1259 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1260 if (!(flags & THR_BOUND)) { 1261 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1262 } 1263 } 1264 // Although this doesn't hurt, we should warn of undefined behavior 1265 // when using unbound T1 threads with schedctl(). This should never 1266 // happen, as the compiler and VM threads are always created bound 1267 DEBUG_ONLY( 1268 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1269 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1270 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1271 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1272 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1273 } 1274 ); 1275 1276 1277 // Mark that we don't have an lwp or thread id yet. 1278 // In case we attempt to set the priority before the thread starts. 1279 osthread->set_lwp_id(-1); 1280 osthread->set_thread_id(-1); 1281 1282 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1283 if (status != 0) { 1284 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1285 perror("os::create_thread"); 1286 } 1287 thread->set_osthread(NULL); 1288 // Need to clean up stuff we've allocated so far 1289 delete osthread; 1290 return false; 1291 } 1292 1293 Atomic::inc(&os::Solaris::_os_thread_count); 1294 1295 // Store info on the Solaris thread into the OSThread 1296 osthread->set_thread_id(tid); 1297 1298 // Remember that we created this thread so we can set priority on it 1299 osthread->set_vm_created(); 1300 1301 // Set the default thread priority otherwise use NormalPriority 1302 1303 if ( UseThreadPriorities ) { 1304 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1305 java_to_os_priority[NormPriority] : 1306 DefaultThreadPriority); 1307 } 1308 1309 // Initial thread state is INITIALIZED, not SUSPENDED 1310 osthread->set_state(INITIALIZED); 1311 1312 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1313 return true; 1314} 1315 1316/* defined for >= Solaris 10. This allows builds on earlier versions 1317 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1318 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1319 * and -XX:+UseAltSigs does nothing since these should have no conflict 1320 */ 1321#if !defined(SIGJVM1) 1322#define SIGJVM1 39 1323#define SIGJVM2 40 1324#endif 1325 1326debug_only(static bool signal_sets_initialized = false); 1327static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1328int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1329int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1330 1331bool os::Solaris::is_sig_ignored(int sig) { 1332 struct sigaction oact; 1333 sigaction(sig, (struct sigaction*)NULL, &oact); 1334 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1335 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1336 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1337 return true; 1338 else 1339 return false; 1340} 1341 1342// Note: SIGRTMIN is a macro that calls sysconf() so it will 1343// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1344static bool isJVM1available() { 1345 return SIGJVM1 < SIGRTMIN; 1346} 1347 1348void os::Solaris::signal_sets_init() { 1349 // Should also have an assertion stating we are still single-threaded. 1350 assert(!signal_sets_initialized, "Already initialized"); 1351 // Fill in signals that are necessarily unblocked for all threads in 1352 // the VM. Currently, we unblock the following signals: 1353 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1354 // by -Xrs (=ReduceSignalUsage)); 1355 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1356 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1357 // the dispositions or masks wrt these signals. 1358 // Programs embedding the VM that want to use the above signals for their 1359 // own purposes must, at this time, use the "-Xrs" option to prevent 1360 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1361 // (See bug 4345157, and other related bugs). 1362 // In reality, though, unblocking these signals is really a nop, since 1363 // these signals are not blocked by default. 1364 sigemptyset(&unblocked_sigs); 1365 sigemptyset(&allowdebug_blocked_sigs); 1366 sigaddset(&unblocked_sigs, SIGILL); 1367 sigaddset(&unblocked_sigs, SIGSEGV); 1368 sigaddset(&unblocked_sigs, SIGBUS); 1369 sigaddset(&unblocked_sigs, SIGFPE); 1370 1371 if (isJVM1available) { 1372 os::Solaris::set_SIGinterrupt(SIGJVM1); 1373 os::Solaris::set_SIGasync(SIGJVM2); 1374 } else if (UseAltSigs) { 1375 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1376 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1377 } else { 1378 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1379 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1380 } 1381 1382 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1383 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1384 1385 if (!ReduceSignalUsage) { 1386 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1387 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1388 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1389 } 1390 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1391 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1392 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1393 } 1394 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1395 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1396 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1397 } 1398 } 1399 // Fill in signals that are blocked by all but the VM thread. 1400 sigemptyset(&vm_sigs); 1401 if (!ReduceSignalUsage) 1402 sigaddset(&vm_sigs, BREAK_SIGNAL); 1403 debug_only(signal_sets_initialized = true); 1404 1405 // For diagnostics only used in run_periodic_checks 1406 sigemptyset(&check_signal_done); 1407} 1408 1409// These are signals that are unblocked while a thread is running Java. 1410// (For some reason, they get blocked by default.) 1411sigset_t* os::Solaris::unblocked_signals() { 1412 assert(signal_sets_initialized, "Not initialized"); 1413 return &unblocked_sigs; 1414} 1415 1416// These are the signals that are blocked while a (non-VM) thread is 1417// running Java. Only the VM thread handles these signals. 1418sigset_t* os::Solaris::vm_signals() { 1419 assert(signal_sets_initialized, "Not initialized"); 1420 return &vm_sigs; 1421} 1422 1423// These are signals that are blocked during cond_wait to allow debugger in 1424sigset_t* os::Solaris::allowdebug_blocked_signals() { 1425 assert(signal_sets_initialized, "Not initialized"); 1426 return &allowdebug_blocked_sigs; 1427} 1428 1429// First crack at OS-specific initialization, from inside the new thread. 1430void os::initialize_thread() { 1431 int r = thr_main() ; 1432 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1433 if (r) { 1434 JavaThread* jt = (JavaThread *)Thread::current(); 1435 assert(jt != NULL,"Sanity check"); 1436 size_t stack_size; 1437 address base = jt->stack_base(); 1438 if (Arguments::created_by_java_launcher()) { 1439 // Use 2MB to allow for Solaris 7 64 bit mode. 1440 stack_size = JavaThread::stack_size_at_create() == 0 1441 ? 2048*K : JavaThread::stack_size_at_create(); 1442 1443 // There are rare cases when we may have already used more than 1444 // the basic stack size allotment before this method is invoked. 1445 // Attempt to allow for a normally sized java_stack. 1446 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1447 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1448 } else { 1449 // 6269555: If we were not created by a Java launcher, i.e. if we are 1450 // running embedded in a native application, treat the primordial thread 1451 // as much like a native attached thread as possible. This means using 1452 // the current stack size from thr_stksegment(), unless it is too large 1453 // to reliably setup guard pages. A reasonable max size is 8MB. 1454 size_t current_size = current_stack_size(); 1455 // This should never happen, but just in case.... 1456 if (current_size == 0) current_size = 2 * K * K; 1457 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1458 } 1459 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1460 stack_size = (size_t)(base - bottom); 1461 1462 assert(stack_size > 0, "Stack size calculation problem"); 1463 1464 if (stack_size > jt->stack_size()) { 1465 NOT_PRODUCT( 1466 struct rlimit limits; 1467 getrlimit(RLIMIT_STACK, &limits); 1468 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1469 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1470 ) 1471 tty->print_cr( 1472 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1473 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1474 "See limit(1) to increase the stack size limit.", 1475 stack_size / K, jt->stack_size() / K); 1476 vm_exit(1); 1477 } 1478 assert(jt->stack_size() >= stack_size, 1479 "Attempt to map more stack than was allocated"); 1480 jt->set_stack_size(stack_size); 1481 } 1482 1483 // 5/22/01: Right now alternate signal stacks do not handle 1484 // throwing stack overflow exceptions, see bug 4463178 1485 // Until a fix is found for this, T2 will NOT imply alternate signal 1486 // stacks. 1487 // If using T2 libthread threads, install an alternate signal stack. 1488 // Because alternate stacks associate with LWPs on Solaris, 1489 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1490 // we prefer to explicitly stack bang. 1491 // If not using T2 libthread, but using UseBoundThreads any threads 1492 // (primordial thread, jni_attachCurrentThread) we do not create, 1493 // probably are not bound, therefore they can not have an alternate 1494 // signal stack. Since our stack banging code is generated and 1495 // is shared across threads, all threads must be bound to allow 1496 // using alternate signal stacks. The alternative is to interpose 1497 // on _lwp_create to associate an alt sig stack with each LWP, 1498 // and this could be a problem when the JVM is embedded. 1499 // We would prefer to use alternate signal stacks with T2 1500 // Since there is currently no accurate way to detect T2 1501 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1502 // on installing alternate signal stacks 1503 1504 1505 // 05/09/03: removed alternate signal stack support for Solaris 1506 // The alternate signal stack mechanism is no longer needed to 1507 // handle stack overflow. This is now handled by allocating 1508 // guard pages (red zone) and stackbanging. 1509 // Initially the alternate signal stack mechanism was removed because 1510 // it did not work with T1 llibthread. Alternate 1511 // signal stacks MUST have all threads bound to lwps. Applications 1512 // can create their own threads and attach them without their being 1513 // bound under T1. This is frequently the case for the primordial thread. 1514 // If we were ever to reenable this mechanism we would need to 1515 // use the dynamic check for T2 libthread. 1516 1517 os::Solaris::init_thread_fpu_state(); 1518} 1519 1520 1521 1522// Free Solaris resources related to the OSThread 1523void os::free_thread(OSThread* osthread) { 1524 assert(osthread != NULL, "os::free_thread but osthread not set"); 1525 1526 1527 // We are told to free resources of the argument thread, 1528 // but we can only really operate on the current thread. 1529 // The main thread must take the VMThread down synchronously 1530 // before the main thread exits and frees up CodeHeap 1531 guarantee((Thread::current()->osthread() == osthread 1532 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1533 if (Thread::current()->osthread() == osthread) { 1534 // Restore caller's signal mask 1535 sigset_t sigmask = osthread->caller_sigmask(); 1536 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1537 } 1538 delete osthread; 1539} 1540 1541void os::pd_start_thread(Thread* thread) { 1542 int status = thr_continue(thread->osthread()->thread_id()); 1543 assert_status(status == 0, status, "thr_continue failed"); 1544} 1545 1546 1547intx os::current_thread_id() { 1548 return (intx)thr_self(); 1549} 1550 1551static pid_t _initial_pid = 0; 1552 1553int os::current_process_id() { 1554 return (int)(_initial_pid ? _initial_pid : getpid()); 1555} 1556 1557int os::allocate_thread_local_storage() { 1558 // %%% in Win32 this allocates a memory segment pointed to by a 1559 // register. Dan Stein can implement a similar feature in 1560 // Solaris. Alternatively, the VM can do the same thing 1561 // explicitly: malloc some storage and keep the pointer in a 1562 // register (which is part of the thread's context) (or keep it 1563 // in TLS). 1564 // %%% In current versions of Solaris, thr_self and TSD can 1565 // be accessed via short sequences of displaced indirections. 1566 // The value of thr_self is available as %g7(36). 1567 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1568 // assuming that the current thread already has a value bound to k. 1569 // It may be worth experimenting with such access patterns, 1570 // and later having the parameters formally exported from a Solaris 1571 // interface. I think, however, that it will be faster to 1572 // maintain the invariant that %g2 always contains the 1573 // JavaThread in Java code, and have stubs simply 1574 // treat %g2 as a caller-save register, preserving it in a %lN. 1575 thread_key_t tk; 1576 if (thr_keycreate( &tk, NULL ) ) 1577 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1578 return int(tk); 1579} 1580 1581void os::free_thread_local_storage(int index) { 1582 // %%% don't think we need anything here 1583 // if ( pthread_key_delete((pthread_key_t) tk) ) 1584 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1585} 1586 1587#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1588 // small number - point is NO swap space available 1589void os::thread_local_storage_at_put(int index, void* value) { 1590 // %%% this is used only in threadLocalStorage.cpp 1591 if (thr_setspecific((thread_key_t)index, value)) { 1592 if (errno == ENOMEM) { 1593 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1594 } else { 1595 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1596 } 1597 } else { 1598 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1599 } 1600} 1601 1602// This function could be called before TLS is initialized, for example, when 1603// VM receives an async signal or when VM causes a fatal error during 1604// initialization. Return NULL if thr_getspecific() fails. 1605void* os::thread_local_storage_at(int index) { 1606 // %%% this is used only in threadLocalStorage.cpp 1607 void* r = NULL; 1608 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1609} 1610 1611 1612const int NANOSECS_PER_MILLISECS = 1000000; 1613// gethrtime can move backwards if read from one cpu and then a different cpu 1614// getTimeNanos is guaranteed to not move backward on Solaris 1615// local spinloop created as faster for a CAS on an int than 1616// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1617// supported on sparc v8 or pre supports_cx8 intel boxes. 1618// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1619// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1620inline hrtime_t oldgetTimeNanos() { 1621 int gotlock = LOCK_INVALID; 1622 hrtime_t newtime = gethrtime(); 1623 1624 for (;;) { 1625// grab lock for max_hrtime 1626 int curlock = max_hrtime_lock; 1627 if (curlock & LOCK_BUSY) continue; 1628 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1629 if (newtime > max_hrtime) { 1630 max_hrtime = newtime; 1631 } else { 1632 newtime = max_hrtime; 1633 } 1634 // release lock 1635 max_hrtime_lock = LOCK_FREE; 1636 return newtime; 1637 } 1638} 1639// gethrtime can move backwards if read from one cpu and then a different cpu 1640// getTimeNanos is guaranteed to not move backward on Solaris 1641inline hrtime_t getTimeNanos() { 1642 if (VM_Version::supports_cx8()) { 1643 bool retry = false; 1644 hrtime_t newtime = gethrtime(); 1645 hrtime_t oldmaxtime = max_hrtime; 1646 hrtime_t retmaxtime = oldmaxtime; 1647 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1648 oldmaxtime = retmaxtime; 1649 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1650 retry = true; 1651 } 1652 return (newtime > retmaxtime) ? newtime : retmaxtime; 1653 } else { 1654 return oldgetTimeNanos(); 1655 } 1656} 1657 1658// Time since start-up in seconds to a fine granularity. 1659// Used by VMSelfDestructTimer and the MemProfiler. 1660double os::elapsedTime() { 1661 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1662} 1663 1664jlong os::elapsed_counter() { 1665 return (jlong)(getTimeNanos() - first_hrtime); 1666} 1667 1668jlong os::elapsed_frequency() { 1669 return hrtime_hz; 1670} 1671 1672// Return the real, user, and system times in seconds from an 1673// arbitrary fixed point in the past. 1674bool os::getTimesSecs(double* process_real_time, 1675 double* process_user_time, 1676 double* process_system_time) { 1677 struct tms ticks; 1678 clock_t real_ticks = times(&ticks); 1679 1680 if (real_ticks == (clock_t) (-1)) { 1681 return false; 1682 } else { 1683 double ticks_per_second = (double) clock_tics_per_sec; 1684 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1685 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1686 // For consistency return the real time from getTimeNanos() 1687 // converted to seconds. 1688 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1689 1690 return true; 1691 } 1692} 1693 1694// Used internally for comparisons only 1695// getTimeMillis guaranteed to not move backwards on Solaris 1696jlong getTimeMillis() { 1697 jlong nanotime = getTimeNanos(); 1698 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1699} 1700 1701// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1702jlong os::javaTimeMillis() { 1703 timeval t; 1704 if (gettimeofday( &t, NULL) == -1) 1705 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1706 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1707} 1708 1709jlong os::javaTimeNanos() { 1710 return (jlong)getTimeNanos(); 1711} 1712 1713void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1714 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1715 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1716 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1717 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1718} 1719 1720char * os::local_time_string(char *buf, size_t buflen) { 1721 struct tm t; 1722 time_t long_time; 1723 time(&long_time); 1724 localtime_r(&long_time, &t); 1725 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1726 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1727 t.tm_hour, t.tm_min, t.tm_sec); 1728 return buf; 1729} 1730 1731// Note: os::shutdown() might be called very early during initialization, or 1732// called from signal handler. Before adding something to os::shutdown(), make 1733// sure it is async-safe and can handle partially initialized VM. 1734void os::shutdown() { 1735 1736 // allow PerfMemory to attempt cleanup of any persistent resources 1737 perfMemory_exit(); 1738 1739 // needs to remove object in file system 1740 AttachListener::abort(); 1741 1742 // flush buffered output, finish log files 1743 ostream_abort(); 1744 1745 // Check for abort hook 1746 abort_hook_t abort_hook = Arguments::abort_hook(); 1747 if (abort_hook != NULL) { 1748 abort_hook(); 1749 } 1750} 1751 1752// Note: os::abort() might be called very early during initialization, or 1753// called from signal handler. Before adding something to os::abort(), make 1754// sure it is async-safe and can handle partially initialized VM. 1755void os::abort(bool dump_core) { 1756 os::shutdown(); 1757 if (dump_core) { 1758#ifndef PRODUCT 1759 fdStream out(defaultStream::output_fd()); 1760 out.print_raw("Current thread is "); 1761 char buf[16]; 1762 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1763 out.print_raw_cr(buf); 1764 out.print_raw_cr("Dumping core ..."); 1765#endif 1766 ::abort(); // dump core (for debugging) 1767 } 1768 1769 ::exit(1); 1770} 1771 1772// Die immediately, no exit hook, no abort hook, no cleanup. 1773void os::die() { 1774 _exit(-1); 1775} 1776 1777// unused 1778void os::set_error_file(const char *logfile) {} 1779 1780// DLL functions 1781 1782const char* os::dll_file_extension() { return ".so"; } 1783 1784const char* os::get_temp_directory() { return "/tmp/"; } 1785 1786const char* os::get_current_directory(char *buf, int buflen) { 1787 return getcwd(buf, buflen); 1788} 1789 1790// check if addr is inside libjvm[_g].so 1791bool os::address_is_in_vm(address addr) { 1792 static address libjvm_base_addr; 1793 Dl_info dlinfo; 1794 1795 if (libjvm_base_addr == NULL) { 1796 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1797 libjvm_base_addr = (address)dlinfo.dli_fbase; 1798 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1799 } 1800 1801 if (dladdr((void *)addr, &dlinfo)) { 1802 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1803 } 1804 1805 return false; 1806} 1807 1808typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1809static dladdr1_func_type dladdr1_func = NULL; 1810 1811bool os::dll_address_to_function_name(address addr, char *buf, 1812 int buflen, int * offset) { 1813 Dl_info dlinfo; 1814 1815 // dladdr1_func was initialized in os::init() 1816 if (dladdr1_func){ 1817 // yes, we have dladdr1 1818 1819 // Support for dladdr1 is checked at runtime; it may be 1820 // available even if the vm is built on a machine that does 1821 // not have dladdr1 support. Make sure there is a value for 1822 // RTLD_DL_SYMENT. 1823 #ifndef RTLD_DL_SYMENT 1824 #define RTLD_DL_SYMENT 1 1825 #endif 1826 Sym * info; 1827 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1828 RTLD_DL_SYMENT)) { 1829 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1830 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1831 1832 // check if the returned symbol really covers addr 1833 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1834 } else { 1835 if (buf) buf[0] = '\0'; 1836 if (offset) *offset = -1; 1837 return false; 1838 } 1839 } else { 1840 // no, only dladdr is available 1841 if(dladdr((void *)addr, &dlinfo)) { 1842 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1843 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1844 return true; 1845 } else { 1846 if (buf) buf[0] = '\0'; 1847 if (offset) *offset = -1; 1848 return false; 1849 } 1850 } 1851} 1852 1853bool os::dll_address_to_library_name(address addr, char* buf, 1854 int buflen, int* offset) { 1855 Dl_info dlinfo; 1856 1857 if (dladdr((void*)addr, &dlinfo)){ 1858 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1859 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1860 return true; 1861 } else { 1862 if (buf) buf[0] = '\0'; 1863 if (offset) *offset = -1; 1864 return false; 1865 } 1866} 1867 1868// Prints the names and full paths of all opened dynamic libraries 1869// for current process 1870void os::print_dll_info(outputStream * st) { 1871 Dl_info dli; 1872 void *handle; 1873 Link_map *map; 1874 Link_map *p; 1875 1876 st->print_cr("Dynamic libraries:"); st->flush(); 1877 1878 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1879 st->print_cr("Error: Cannot print dynamic libraries."); 1880 return; 1881 } 1882 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1883 if (handle == NULL) { 1884 st->print_cr("Error: Cannot print dynamic libraries."); 1885 return; 1886 } 1887 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1888 if (map == NULL) { 1889 st->print_cr("Error: Cannot print dynamic libraries."); 1890 return; 1891 } 1892 1893 while (map->l_prev != NULL) 1894 map = map->l_prev; 1895 1896 while (map != NULL) { 1897 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1898 map = map->l_next; 1899 } 1900 1901 dlclose(handle); 1902} 1903 1904 // Loads .dll/.so and 1905 // in case of error it checks if .dll/.so was built for the 1906 // same architecture as Hotspot is running on 1907 1908void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1909{ 1910 void * result= ::dlopen(filename, RTLD_LAZY); 1911 if (result != NULL) { 1912 // Successful loading 1913 return result; 1914 } 1915 1916 Elf32_Ehdr elf_head; 1917 1918 // Read system error message into ebuf 1919 // It may or may not be overwritten below 1920 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1921 ebuf[ebuflen-1]='\0'; 1922 int diag_msg_max_length=ebuflen-strlen(ebuf); 1923 char* diag_msg_buf=ebuf+strlen(ebuf); 1924 1925 if (diag_msg_max_length==0) { 1926 // No more space in ebuf for additional diagnostics message 1927 return NULL; 1928 } 1929 1930 1931 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1932 1933 if (file_descriptor < 0) { 1934 // Can't open library, report dlerror() message 1935 return NULL; 1936 } 1937 1938 bool failed_to_read_elf_head= 1939 (sizeof(elf_head)!= 1940 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1941 1942 ::close(file_descriptor); 1943 if (failed_to_read_elf_head) { 1944 // file i/o error - report dlerror() msg 1945 return NULL; 1946 } 1947 1948 typedef struct { 1949 Elf32_Half code; // Actual value as defined in elf.h 1950 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1951 char elf_class; // 32 or 64 bit 1952 char endianess; // MSB or LSB 1953 char* name; // String representation 1954 } arch_t; 1955 1956 static const arch_t arch_array[]={ 1957 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1958 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1959 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1960 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1961 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1962 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1963 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1964 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1965 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 1966 }; 1967 1968 #if (defined IA32) 1969 static Elf32_Half running_arch_code=EM_386; 1970 #elif (defined AMD64) 1971 static Elf32_Half running_arch_code=EM_X86_64; 1972 #elif (defined IA64) 1973 static Elf32_Half running_arch_code=EM_IA_64; 1974 #elif (defined __sparc) && (defined _LP64) 1975 static Elf32_Half running_arch_code=EM_SPARCV9; 1976 #elif (defined __sparc) && (!defined _LP64) 1977 static Elf32_Half running_arch_code=EM_SPARC; 1978 #elif (defined __powerpc64__) 1979 static Elf32_Half running_arch_code=EM_PPC64; 1980 #elif (defined __powerpc__) 1981 static Elf32_Half running_arch_code=EM_PPC; 1982 #else 1983 #error Method os::dll_load requires that one of following is defined:\ 1984 IA32, AMD64, IA64, __sparc, __powerpc__ 1985 #endif 1986 1987 // Identify compatability class for VM's architecture and library's architecture 1988 // Obtain string descriptions for architectures 1989 1990 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1991 int running_arch_index=-1; 1992 1993 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 1994 if (running_arch_code == arch_array[i].code) { 1995 running_arch_index = i; 1996 } 1997 if (lib_arch.code == arch_array[i].code) { 1998 lib_arch.compat_class = arch_array[i].compat_class; 1999 lib_arch.name = arch_array[i].name; 2000 } 2001 } 2002 2003 assert(running_arch_index != -1, 2004 "Didn't find running architecture code (running_arch_code) in arch_array"); 2005 if (running_arch_index == -1) { 2006 // Even though running architecture detection failed 2007 // we may still continue with reporting dlerror() message 2008 return NULL; 2009 } 2010 2011 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2012 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2013 return NULL; 2014 } 2015 2016 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2017 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2018 return NULL; 2019 } 2020 2021 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2022 if ( lib_arch.name!=NULL ) { 2023 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2024 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2025 lib_arch.name, arch_array[running_arch_index].name); 2026 } else { 2027 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2028 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2029 lib_arch.code, 2030 arch_array[running_arch_index].name); 2031 } 2032 } 2033 2034 return NULL; 2035} 2036 2037 2038 2039bool _print_ascii_file(const char* filename, outputStream* st) { 2040 int fd = open(filename, O_RDONLY); 2041 if (fd == -1) { 2042 return false; 2043 } 2044 2045 char buf[32]; 2046 int bytes; 2047 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2048 st->print_raw(buf, bytes); 2049 } 2050 2051 close(fd); 2052 2053 return true; 2054} 2055 2056void os::print_os_info(outputStream* st) { 2057 st->print("OS:"); 2058 2059 if (!_print_ascii_file("/etc/release", st)) { 2060 st->print("Solaris"); 2061 } 2062 st->cr(); 2063 2064 // kernel 2065 st->print("uname:"); 2066 struct utsname name; 2067 uname(&name); 2068 st->print(name.sysname); st->print(" "); 2069 st->print(name.release); st->print(" "); 2070 st->print(name.version); st->print(" "); 2071 st->print(name.machine); 2072 2073 // libthread 2074 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2075 else st->print(" (T1 libthread)"); 2076 st->cr(); 2077 2078 // rlimit 2079 st->print("rlimit:"); 2080 struct rlimit rlim; 2081 2082 st->print(" STACK "); 2083 getrlimit(RLIMIT_STACK, &rlim); 2084 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2085 else st->print("%uk", rlim.rlim_cur >> 10); 2086 2087 st->print(", CORE "); 2088 getrlimit(RLIMIT_CORE, &rlim); 2089 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2090 else st->print("%uk", rlim.rlim_cur >> 10); 2091 2092 st->print(", NOFILE "); 2093 getrlimit(RLIMIT_NOFILE, &rlim); 2094 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2095 else st->print("%d", rlim.rlim_cur); 2096 2097 st->print(", AS "); 2098 getrlimit(RLIMIT_AS, &rlim); 2099 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2100 else st->print("%uk", rlim.rlim_cur >> 10); 2101 st->cr(); 2102 2103 // load average 2104 st->print("load average:"); 2105 double loadavg[3]; 2106 os::loadavg(loadavg, 3); 2107 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2108 st->cr(); 2109} 2110 2111 2112static bool check_addr0(outputStream* st) { 2113 jboolean status = false; 2114 int fd = open("/proc/self/map",O_RDONLY); 2115 if (fd >= 0) { 2116 prmap_t p; 2117 while(read(fd, &p, sizeof(p)) > 0) { 2118 if (p.pr_vaddr == 0x0) { 2119 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2120 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2121 st->print("Access:"); 2122 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2123 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2124 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2125 st->cr(); 2126 status = true; 2127 } 2128 close(fd); 2129 } 2130 } 2131 return status; 2132} 2133 2134void os::print_memory_info(outputStream* st) { 2135 st->print("Memory:"); 2136 st->print(" %dk page", os::vm_page_size()>>10); 2137 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2138 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2139 st->cr(); 2140 (void) check_addr0(st); 2141} 2142 2143// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2144// but they're the same for all the solaris architectures that we support. 2145const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2146 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2147 "ILL_COPROC", "ILL_BADSTK" }; 2148 2149const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2150 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2151 "FPE_FLTINV", "FPE_FLTSUB" }; 2152 2153const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2154 2155const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2156 2157void os::print_siginfo(outputStream* st, void* siginfo) { 2158 st->print("siginfo:"); 2159 2160 const int buflen = 100; 2161 char buf[buflen]; 2162 siginfo_t *si = (siginfo_t*)siginfo; 2163 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2164 char *err = strerror(si->si_errno); 2165 if (si->si_errno != 0 && err != NULL) { 2166 st->print("si_errno=%s", err); 2167 } else { 2168 st->print("si_errno=%d", si->si_errno); 2169 } 2170 const int c = si->si_code; 2171 assert(c > 0, "unexpected si_code"); 2172 switch (si->si_signo) { 2173 case SIGILL: 2174 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2175 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2176 break; 2177 case SIGFPE: 2178 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2179 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2180 break; 2181 case SIGSEGV: 2182 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2183 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2184 break; 2185 case SIGBUS: 2186 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2187 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2188 break; 2189 default: 2190 st->print(", si_code=%d", si->si_code); 2191 // no si_addr 2192 } 2193 2194 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2195 UseSharedSpaces) { 2196 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2197 if (mapinfo->is_in_shared_space(si->si_addr)) { 2198 st->print("\n\nError accessing class data sharing archive." \ 2199 " Mapped file inaccessible during execution, " \ 2200 " possible disk/network problem."); 2201 } 2202 } 2203 st->cr(); 2204} 2205 2206// Moved from whole group, because we need them here for diagnostic 2207// prints. 2208#define OLDMAXSIGNUM 32 2209static int Maxsignum = 0; 2210static int *ourSigFlags = NULL; 2211 2212extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2213 2214int os::Solaris::get_our_sigflags(int sig) { 2215 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2216 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2217 return ourSigFlags[sig]; 2218} 2219 2220void os::Solaris::set_our_sigflags(int sig, int flags) { 2221 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2222 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2223 ourSigFlags[sig] = flags; 2224} 2225 2226 2227static const char* get_signal_handler_name(address handler, 2228 char* buf, int buflen) { 2229 int offset; 2230 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2231 if (found) { 2232 // skip directory names 2233 const char *p1, *p2; 2234 p1 = buf; 2235 size_t len = strlen(os::file_separator()); 2236 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2237 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2238 } else { 2239 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2240 } 2241 return buf; 2242} 2243 2244static void print_signal_handler(outputStream* st, int sig, 2245 char* buf, size_t buflen) { 2246 struct sigaction sa; 2247 2248 sigaction(sig, NULL, &sa); 2249 2250 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2251 2252 address handler = (sa.sa_flags & SA_SIGINFO) 2253 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2254 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2255 2256 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2257 st->print("SIG_DFL"); 2258 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2259 st->print("SIG_IGN"); 2260 } else { 2261 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2262 } 2263 2264 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2265 2266 address rh = VMError::get_resetted_sighandler(sig); 2267 // May be, handler was resetted by VMError? 2268 if(rh != NULL) { 2269 handler = rh; 2270 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2271 } 2272 2273 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2274 2275 // Check: is it our handler? 2276 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2277 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2278 // It is our signal handler 2279 // check for flags 2280 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2281 st->print( 2282 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2283 os::Solaris::get_our_sigflags(sig)); 2284 } 2285 } 2286 st->cr(); 2287} 2288 2289void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2290 st->print_cr("Signal Handlers:"); 2291 print_signal_handler(st, SIGSEGV, buf, buflen); 2292 print_signal_handler(st, SIGBUS , buf, buflen); 2293 print_signal_handler(st, SIGFPE , buf, buflen); 2294 print_signal_handler(st, SIGPIPE, buf, buflen); 2295 print_signal_handler(st, SIGXFSZ, buf, buflen); 2296 print_signal_handler(st, SIGILL , buf, buflen); 2297 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2298 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2299 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2300 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2301 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2302 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2303 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2304 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2305} 2306 2307static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2308 2309// Find the full path to the current module, libjvm.so or libjvm_g.so 2310void os::jvm_path(char *buf, jint buflen) { 2311 // Error checking. 2312 if (buflen < MAXPATHLEN) { 2313 assert(false, "must use a large-enough buffer"); 2314 buf[0] = '\0'; 2315 return; 2316 } 2317 // Lazy resolve the path to current module. 2318 if (saved_jvm_path[0] != 0) { 2319 strcpy(buf, saved_jvm_path); 2320 return; 2321 } 2322 2323 Dl_info dlinfo; 2324 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2325 assert(ret != 0, "cannot locate libjvm"); 2326 realpath((char *)dlinfo.dli_fname, buf); 2327 2328 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2329 // Support for the gamma launcher. Typical value for buf is 2330 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2331 // the right place in the string, then assume we are installed in a JDK and 2332 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2333 // up the path so it looks like libjvm.so is installed there (append a 2334 // fake suffix hotspot/libjvm.so). 2335 const char *p = buf + strlen(buf) - 1; 2336 for (int count = 0; p > buf && count < 5; ++count) { 2337 for (--p; p > buf && *p != '/'; --p) 2338 /* empty */ ; 2339 } 2340 2341 if (strncmp(p, "/jre/lib/", 9) != 0) { 2342 // Look for JAVA_HOME in the environment. 2343 char* java_home_var = ::getenv("JAVA_HOME"); 2344 if (java_home_var != NULL && java_home_var[0] != 0) { 2345 char cpu_arch[12]; 2346 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2347#ifdef _LP64 2348 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2349 if (strcmp(cpu_arch, "sparc") == 0) { 2350 strcat(cpu_arch, "v9"); 2351 } else if (strcmp(cpu_arch, "i386") == 0) { 2352 strcpy(cpu_arch, "amd64"); 2353 } 2354#endif 2355 // Check the current module name "libjvm.so" or "libjvm_g.so". 2356 p = strrchr(buf, '/'); 2357 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2358 p = strstr(p, "_g") ? "_g" : ""; 2359 2360 realpath(java_home_var, buf); 2361 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2362 if (0 == access(buf, F_OK)) { 2363 // Use current module name "libjvm[_g].so" instead of 2364 // "libjvm"debug_only("_g")".so" since for fastdebug version 2365 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2366 // It is used when we are choosing the HPI library's name 2367 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2368 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2369 } else { 2370 // Go back to path of .so 2371 realpath((char *)dlinfo.dli_fname, buf); 2372 } 2373 } 2374 } 2375 } 2376 2377 strcpy(saved_jvm_path, buf); 2378} 2379 2380 2381void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2382 // no prefix required, not even "_" 2383} 2384 2385 2386void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2387 // no suffix required 2388} 2389 2390 2391// sun.misc.Signal 2392 2393extern "C" { 2394 static void UserHandler(int sig, void *siginfo, void *context) { 2395 // Ctrl-C is pressed during error reporting, likely because the error 2396 // handler fails to abort. Let VM die immediately. 2397 if (sig == SIGINT && is_error_reported()) { 2398 os::die(); 2399 } 2400 2401 os::signal_notify(sig); 2402 // We do not need to reinstate the signal handler each time... 2403 } 2404} 2405 2406void* os::user_handler() { 2407 return CAST_FROM_FN_PTR(void*, UserHandler); 2408} 2409 2410extern "C" { 2411 typedef void (*sa_handler_t)(int); 2412 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2413} 2414 2415void* os::signal(int signal_number, void* handler) { 2416 struct sigaction sigAct, oldSigAct; 2417 sigfillset(&(sigAct.sa_mask)); 2418 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2419 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2420 2421 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2422 // -1 means registration failed 2423 return (void *)-1; 2424 2425 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2426} 2427 2428void os::signal_raise(int signal_number) { 2429 raise(signal_number); 2430} 2431 2432/* 2433 * The following code is moved from os.cpp for making this 2434 * code platform specific, which it is by its very nature. 2435 */ 2436 2437// a counter for each possible signal value 2438static int Sigexit = 0; 2439static int Maxlibjsigsigs; 2440static jint *pending_signals = NULL; 2441static int *preinstalled_sigs = NULL; 2442static struct sigaction *chainedsigactions = NULL; 2443static sema_t sig_sem; 2444typedef int (*version_getting_t)(); 2445version_getting_t os::Solaris::get_libjsig_version = NULL; 2446static int libjsigversion = NULL; 2447 2448int os::sigexitnum_pd() { 2449 assert(Sigexit > 0, "signal memory not yet initialized"); 2450 return Sigexit; 2451} 2452 2453void os::Solaris::init_signal_mem() { 2454 // Initialize signal structures 2455 Maxsignum = SIGRTMAX; 2456 Sigexit = Maxsignum+1; 2457 assert(Maxsignum >0, "Unable to obtain max signal number"); 2458 2459 Maxlibjsigsigs = Maxsignum; 2460 2461 // pending_signals has one int per signal 2462 // The additional signal is for SIGEXIT - exit signal to signal_thread 2463 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2464 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2465 2466 if (UseSignalChaining) { 2467 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2468 * (Maxsignum + 1)); 2469 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2470 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2471 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2472 } 2473 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2474 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2475} 2476 2477void os::signal_init_pd() { 2478 int ret; 2479 2480 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2481 assert(ret == 0, "sema_init() failed"); 2482} 2483 2484void os::signal_notify(int signal_number) { 2485 int ret; 2486 2487 Atomic::inc(&pending_signals[signal_number]); 2488 ret = ::sema_post(&sig_sem); 2489 assert(ret == 0, "sema_post() failed"); 2490} 2491 2492static int check_pending_signals(bool wait_for_signal) { 2493 int ret; 2494 while (true) { 2495 for (int i = 0; i < Sigexit + 1; i++) { 2496 jint n = pending_signals[i]; 2497 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2498 return i; 2499 } 2500 } 2501 if (!wait_for_signal) { 2502 return -1; 2503 } 2504 JavaThread *thread = JavaThread::current(); 2505 ThreadBlockInVM tbivm(thread); 2506 2507 bool threadIsSuspended; 2508 do { 2509 thread->set_suspend_equivalent(); 2510 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2511 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2512 ; 2513 assert(ret == 0, "sema_wait() failed"); 2514 2515 // were we externally suspended while we were waiting? 2516 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2517 if (threadIsSuspended) { 2518 // 2519 // The semaphore has been incremented, but while we were waiting 2520 // another thread suspended us. We don't want to continue running 2521 // while suspended because that would surprise the thread that 2522 // suspended us. 2523 // 2524 ret = ::sema_post(&sig_sem); 2525 assert(ret == 0, "sema_post() failed"); 2526 2527 thread->java_suspend_self(); 2528 } 2529 } while (threadIsSuspended); 2530 } 2531} 2532 2533int os::signal_lookup() { 2534 return check_pending_signals(false); 2535} 2536 2537int os::signal_wait() { 2538 return check_pending_signals(true); 2539} 2540 2541//////////////////////////////////////////////////////////////////////////////// 2542// Virtual Memory 2543 2544static int page_size = -1; 2545 2546// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2547// clear this var if support is not available. 2548static bool has_map_align = true; 2549 2550int os::vm_page_size() { 2551 assert(page_size != -1, "must call os::init"); 2552 return page_size; 2553} 2554 2555// Solaris allocates memory by pages. 2556int os::vm_allocation_granularity() { 2557 assert(page_size != -1, "must call os::init"); 2558 return page_size; 2559} 2560 2561bool os::commit_memory(char* addr, size_t bytes) { 2562 size_t size = bytes; 2563 return 2564 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2565 PROT_READ | PROT_WRITE | PROT_EXEC); 2566} 2567 2568bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2569 if (commit_memory(addr, bytes)) { 2570 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2571 // If the large page size has been set and the VM 2572 // is using large pages, use the large page size 2573 // if it is smaller than the alignment hint. This is 2574 // a case where the VM wants to use a larger alignment size 2575 // for its own reasons but still want to use large pages 2576 // (which is what matters to setting the mpss range. 2577 size_t page_size = 0; 2578 if (large_page_size() < alignment_hint) { 2579 assert(UseLargePages, "Expected to be here for large page use only"); 2580 page_size = large_page_size(); 2581 } else { 2582 // If the alignment hint is less than the large page 2583 // size, the VM wants a particular alignment (thus the hint) 2584 // for internal reasons. Try to set the mpss range using 2585 // the alignment_hint. 2586 page_size = alignment_hint; 2587 } 2588 // Since this is a hint, ignore any failures. 2589 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2590 } 2591 return true; 2592 } 2593 return false; 2594} 2595 2596// Uncommit the pages in a specified region. 2597void os::free_memory(char* addr, size_t bytes) { 2598 if (madvise(addr, bytes, MADV_FREE) < 0) { 2599 debug_only(warning("MADV_FREE failed.")); 2600 return; 2601 } 2602} 2603 2604// Change the page size in a given range. 2605void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2606 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2607 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2608 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2609} 2610 2611// Tell the OS to make the range local to the first-touching LWP 2612void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2613 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2614 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2615 debug_only(warning("MADV_ACCESS_LWP failed.")); 2616 } 2617} 2618 2619// Tell the OS that this range would be accessed from different LWPs. 2620void os::numa_make_global(char *addr, size_t bytes) { 2621 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2622 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2623 debug_only(warning("MADV_ACCESS_MANY failed.")); 2624 } 2625} 2626 2627// Get the number of the locality groups. 2628size_t os::numa_get_groups_num() { 2629 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2630 return n != -1 ? n : 1; 2631} 2632 2633// Get a list of leaf locality groups. A leaf lgroup is group that 2634// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2635// board. An LWP is assigned to one of these groups upon creation. 2636size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2637 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2638 ids[0] = 0; 2639 return 1; 2640 } 2641 int result_size = 0, top = 1, bottom = 0, cur = 0; 2642 for (int k = 0; k < size; k++) { 2643 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2644 (Solaris::lgrp_id_t*)&ids[top], size - top); 2645 if (r == -1) { 2646 ids[0] = 0; 2647 return 1; 2648 } 2649 if (!r) { 2650 // That's a leaf node. 2651 assert (bottom <= cur, "Sanity check"); 2652 // Check if the node has memory 2653 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2654 NULL, 0, LGRP_RSRC_MEM) > 0) { 2655 ids[bottom++] = ids[cur]; 2656 } 2657 } 2658 top += r; 2659 cur++; 2660 } 2661 if (bottom == 0) { 2662 // Handle a situation, when the OS reports no memory available. 2663 // Assume UMA architecture. 2664 ids[0] = 0; 2665 return 1; 2666 } 2667 return bottom; 2668} 2669 2670// Detect the topology change. Typically happens during CPU pluggin-unplugging. 2671bool os::numa_topology_changed() { 2672 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2673 if (is_stale != -1 && is_stale) { 2674 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2675 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2676 assert(c != 0, "Failure to initialize LGRP API"); 2677 Solaris::set_lgrp_cookie(c); 2678 return true; 2679 } 2680 return false; 2681} 2682 2683// Get the group id of the current LWP. 2684int os::numa_get_group_id() { 2685 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2686 if (lgrp_id == -1) { 2687 return 0; 2688 } 2689 const int size = os::numa_get_groups_num(); 2690 int *ids = (int*)alloca(size * sizeof(int)); 2691 2692 // Get the ids of all lgroups with memory; r is the count. 2693 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2694 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2695 if (r <= 0) { 2696 return 0; 2697 } 2698 return ids[os::random() % r]; 2699} 2700 2701// Request information about the page. 2702bool os::get_page_info(char *start, page_info* info) { 2703 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2704 uint64_t addr = (uintptr_t)start; 2705 uint64_t outdata[2]; 2706 uint_t validity = 0; 2707 2708 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2709 return false; 2710 } 2711 2712 info->size = 0; 2713 info->lgrp_id = -1; 2714 2715 if ((validity & 1) != 0) { 2716 if ((validity & 2) != 0) { 2717 info->lgrp_id = outdata[0]; 2718 } 2719 if ((validity & 4) != 0) { 2720 info->size = outdata[1]; 2721 } 2722 return true; 2723 } 2724 return false; 2725} 2726 2727// Scan the pages from start to end until a page different than 2728// the one described in the info parameter is encountered. 2729char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2730 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2731 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2732 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2733 uint_t validity[MAX_MEMINFO_CNT]; 2734 2735 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2736 uint64_t p = (uint64_t)start; 2737 while (p < (uint64_t)end) { 2738 addrs[0] = p; 2739 size_t addrs_count = 1; 2740 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2741 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2742 addrs_count++; 2743 } 2744 2745 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2746 return NULL; 2747 } 2748 2749 size_t i = 0; 2750 for (; i < addrs_count; i++) { 2751 if ((validity[i] & 1) != 0) { 2752 if ((validity[i] & 4) != 0) { 2753 if (outdata[types * i + 1] != page_expected->size) { 2754 break; 2755 } 2756 } else 2757 if (page_expected->size != 0) { 2758 break; 2759 } 2760 2761 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2762 if (outdata[types * i] != page_expected->lgrp_id) { 2763 break; 2764 } 2765 } 2766 } else { 2767 return NULL; 2768 } 2769 } 2770 2771 if (i != addrs_count) { 2772 if ((validity[i] & 2) != 0) { 2773 page_found->lgrp_id = outdata[types * i]; 2774 } else { 2775 page_found->lgrp_id = -1; 2776 } 2777 if ((validity[i] & 4) != 0) { 2778 page_found->size = outdata[types * i + 1]; 2779 } else { 2780 page_found->size = 0; 2781 } 2782 return (char*)addrs[i]; 2783 } 2784 2785 p = addrs[addrs_count - 1] + page_size; 2786 } 2787 return end; 2788} 2789 2790bool os::uncommit_memory(char* addr, size_t bytes) { 2791 size_t size = bytes; 2792 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2793 // uncommitted page. Otherwise, the read/write might succeed if we 2794 // have enough swap space to back the physical page. 2795 return 2796 NULL != Solaris::mmap_chunk(addr, size, 2797 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2798 PROT_NONE); 2799} 2800 2801char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2802 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2803 2804 if (b == MAP_FAILED) { 2805 return NULL; 2806 } 2807 return b; 2808} 2809 2810char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2811 char* addr = requested_addr; 2812 int flags = MAP_PRIVATE | MAP_NORESERVE; 2813 2814 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2815 2816 if (fixed) { 2817 flags |= MAP_FIXED; 2818 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2819 flags |= MAP_ALIGN; 2820 addr = (char*) alignment_hint; 2821 } 2822 2823 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2824 // uncommitted page. Otherwise, the read/write might succeed if we 2825 // have enough swap space to back the physical page. 2826 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2827} 2828 2829char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2830 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2831 2832 guarantee(requested_addr == NULL || requested_addr == addr, 2833 "OS failed to return requested mmap address."); 2834 return addr; 2835} 2836 2837// Reserve memory at an arbitrary address, only if that area is 2838// available (and not reserved for something else). 2839 2840char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2841 const int max_tries = 10; 2842 char* base[max_tries]; 2843 size_t size[max_tries]; 2844 2845 // Solaris adds a gap between mmap'ed regions. The size of the gap 2846 // is dependent on the requested size and the MMU. Our initial gap 2847 // value here is just a guess and will be corrected later. 2848 bool had_top_overlap = false; 2849 bool have_adjusted_gap = false; 2850 size_t gap = 0x400000; 2851 2852 // Assert only that the size is a multiple of the page size, since 2853 // that's all that mmap requires, and since that's all we really know 2854 // about at this low abstraction level. If we need higher alignment, 2855 // we can either pass an alignment to this method or verify alignment 2856 // in one of the methods further up the call chain. See bug 5044738. 2857 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2858 2859 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2860 // Give it a try, if the kernel honors the hint we can return immediately. 2861 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2862 volatile int err = errno; 2863 if (addr == requested_addr) { 2864 return addr; 2865 } else if (addr != NULL) { 2866 unmap_memory(addr, bytes); 2867 } 2868 2869 if (PrintMiscellaneous && Verbose) { 2870 char buf[256]; 2871 buf[0] = '\0'; 2872 if (addr == NULL) { 2873 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2874 } 2875 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2876 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2877 "%s", bytes, requested_addr, addr, buf); 2878 } 2879 2880 // Address hint method didn't work. Fall back to the old method. 2881 // In theory, once SNV becomes our oldest supported platform, this 2882 // code will no longer be needed. 2883 // 2884 // Repeatedly allocate blocks until the block is allocated at the 2885 // right spot. Give up after max_tries. 2886 int i; 2887 for (i = 0; i < max_tries; ++i) { 2888 base[i] = reserve_memory(bytes); 2889 2890 if (base[i] != NULL) { 2891 // Is this the block we wanted? 2892 if (base[i] == requested_addr) { 2893 size[i] = bytes; 2894 break; 2895 } 2896 2897 // check that the gap value is right 2898 if (had_top_overlap && !have_adjusted_gap) { 2899 size_t actual_gap = base[i-1] - base[i] - bytes; 2900 if (gap != actual_gap) { 2901 // adjust the gap value and retry the last 2 allocations 2902 assert(i > 0, "gap adjustment code problem"); 2903 have_adjusted_gap = true; // adjust the gap only once, just in case 2904 gap = actual_gap; 2905 if (PrintMiscellaneous && Verbose) { 2906 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2907 } 2908 unmap_memory(base[i], bytes); 2909 unmap_memory(base[i-1], size[i-1]); 2910 i-=2; 2911 continue; 2912 } 2913 } 2914 2915 // Does this overlap the block we wanted? Give back the overlapped 2916 // parts and try again. 2917 // 2918 // There is still a bug in this code: if top_overlap == bytes, 2919 // the overlap is offset from requested region by the value of gap. 2920 // In this case giving back the overlapped part will not work, 2921 // because we'll give back the entire block at base[i] and 2922 // therefore the subsequent allocation will not generate a new gap. 2923 // This could be fixed with a new algorithm that used larger 2924 // or variable size chunks to find the requested region - 2925 // but such a change would introduce additional complications. 2926 // It's rare enough that the planets align for this bug, 2927 // so we'll just wait for a fix for 6204603/5003415 which 2928 // will provide a mmap flag to allow us to avoid this business. 2929 2930 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2931 if (top_overlap >= 0 && top_overlap < bytes) { 2932 had_top_overlap = true; 2933 unmap_memory(base[i], top_overlap); 2934 base[i] += top_overlap; 2935 size[i] = bytes - top_overlap; 2936 } else { 2937 size_t bottom_overlap = base[i] + bytes - requested_addr; 2938 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2939 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2940 warning("attempt_reserve_memory_at: possible alignment bug"); 2941 } 2942 unmap_memory(requested_addr, bottom_overlap); 2943 size[i] = bytes - bottom_overlap; 2944 } else { 2945 size[i] = bytes; 2946 } 2947 } 2948 } 2949 } 2950 2951 // Give back the unused reserved pieces. 2952 2953 for (int j = 0; j < i; ++j) { 2954 if (base[j] != NULL) { 2955 unmap_memory(base[j], size[j]); 2956 } 2957 } 2958 2959 return (i < max_tries) ? requested_addr : NULL; 2960} 2961 2962bool os::release_memory(char* addr, size_t bytes) { 2963 size_t size = bytes; 2964 return munmap(addr, size) == 0; 2965} 2966 2967static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2968 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2969 "addr must be page aligned"); 2970 int retVal = mprotect(addr, bytes, prot); 2971 return retVal == 0; 2972} 2973 2974// Protect memory (make it read-only. (Used to pass readonly pages through 2975// JNI GetArray<type>Elements with empty arrays.) 2976bool os::protect_memory(char* addr, size_t bytes) { 2977 return solaris_mprotect(addr, bytes, PROT_READ); 2978} 2979 2980// guard_memory and unguard_memory only happens within stack guard pages. 2981// Since ISM pertains only to the heap, guard and unguard memory should not 2982/// happen with an ISM region. 2983bool os::guard_memory(char* addr, size_t bytes) { 2984 return solaris_mprotect(addr, bytes, PROT_NONE); 2985} 2986 2987bool os::unguard_memory(char* addr, size_t bytes) { 2988 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 2989} 2990 2991// Large page support 2992 2993// UseLargePages is the master flag to enable/disable large page memory. 2994// UseMPSS and UseISM are supported for compatibility reasons. Their combined 2995// effects can be described in the following table: 2996// 2997// UseLargePages UseMPSS UseISM 2998// false * * => UseLargePages is the master switch, turning 2999// it off will turn off both UseMPSS and 3000// UseISM. VM will not use large page memory 3001// regardless the settings of UseMPSS/UseISM. 3002// true false false => Unless future Solaris provides other 3003// mechanism to use large page memory, this 3004// combination is equivalent to -UseLargePages, 3005// VM will not use large page memory 3006// true true false => JVM will use MPSS for large page memory. 3007// This is the default behavior. 3008// true false true => JVM will use ISM for large page memory. 3009// true true true => JVM will use ISM if it is available. 3010// Otherwise, JVM will fall back to MPSS. 3011// Becaues ISM is now available on all 3012// supported Solaris versions, this combination 3013// is equivalent to +UseISM -UseMPSS. 3014 3015typedef int (*getpagesizes_func_type) (size_t[], int); 3016static size_t _large_page_size = 0; 3017 3018bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3019 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3020 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3021 // can support multiple page sizes. 3022 3023 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3024 // ISM is only recommended on old Solaris where there is no MPSS support. 3025 // Simply choose a conservative value as default. 3026 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3027 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3028 3029 // ISM is available on all supported Solaris versions 3030 return true; 3031} 3032 3033// Insertion sort for small arrays (descending order). 3034static void insertion_sort_descending(size_t* array, int len) { 3035 for (int i = 0; i < len; i++) { 3036 size_t val = array[i]; 3037 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3038 size_t tmp = array[key]; 3039 array[key] = array[key - 1]; 3040 array[key - 1] = tmp; 3041 } 3042 } 3043} 3044 3045bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3046 getpagesizes_func_type getpagesizes_func = 3047 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3048 if (getpagesizes_func == NULL) { 3049 if (warn) { 3050 warning("MPSS is not supported by the operating system."); 3051 } 3052 return false; 3053 } 3054 3055 const unsigned int usable_count = VM_Version::page_size_count(); 3056 if (usable_count == 1) { 3057 return false; 3058 } 3059 3060 // Fill the array of page sizes. 3061 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3062 assert(n > 0, "Solaris bug?"); 3063 if (n == page_sizes_max) { 3064 // Add a sentinel value (necessary only if the array was completely filled 3065 // since it is static (zeroed at initialization)). 3066 _page_sizes[--n] = 0; 3067 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3068 } 3069 assert(_page_sizes[n] == 0, "missing sentinel"); 3070 3071 if (n == 1) return false; // Only one page size available. 3072 3073 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3074 // select up to usable_count elements. First sort the array, find the first 3075 // acceptable value, then copy the usable sizes to the top of the array and 3076 // trim the rest. Make sure to include the default page size :-). 3077 // 3078 // A better policy could get rid of the 4M limit by taking the sizes of the 3079 // important VM memory regions (java heap and possibly the code cache) into 3080 // account. 3081 insertion_sort_descending(_page_sizes, n); 3082 const size_t size_limit = 3083 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3084 int beg; 3085 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3086 const int end = MIN2((int)usable_count, n) - 1; 3087 for (int cur = 0; cur < end; ++cur, ++beg) { 3088 _page_sizes[cur] = _page_sizes[beg]; 3089 } 3090 _page_sizes[end] = vm_page_size(); 3091 _page_sizes[end + 1] = 0; 3092 3093 if (_page_sizes[end] > _page_sizes[end - 1]) { 3094 // Default page size is not the smallest; sort again. 3095 insertion_sort_descending(_page_sizes, end + 1); 3096 } 3097 *page_size = _page_sizes[0]; 3098 3099 return true; 3100} 3101 3102bool os::large_page_init() { 3103 if (!UseLargePages) { 3104 UseISM = false; 3105 UseMPSS = false; 3106 return false; 3107 } 3108 3109 // print a warning if any large page related flag is specified on command line 3110 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3111 !FLAG_IS_DEFAULT(UseISM) || 3112 !FLAG_IS_DEFAULT(UseMPSS) || 3113 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3114 UseISM = UseISM && 3115 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3116 if (UseISM) { 3117 // ISM disables MPSS to be compatible with old JDK behavior 3118 UseMPSS = false; 3119 _page_sizes[0] = _large_page_size; 3120 _page_sizes[1] = vm_page_size(); 3121 } 3122 3123 UseMPSS = UseMPSS && 3124 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3125 3126 UseLargePages = UseISM || UseMPSS; 3127 return UseLargePages; 3128} 3129 3130bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3131 // Signal to OS that we want large pages for addresses 3132 // from addr, addr + bytes 3133 struct memcntl_mha mpss_struct; 3134 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3135 mpss_struct.mha_pagesize = align; 3136 mpss_struct.mha_flags = 0; 3137 if (memcntl(start, bytes, MC_HAT_ADVISE, 3138 (caddr_t) &mpss_struct, 0, 0) < 0) { 3139 debug_only(warning("Attempt to use MPSS failed.")); 3140 return false; 3141 } 3142 return true; 3143} 3144 3145char* os::reserve_memory_special(size_t bytes) { 3146 assert(UseLargePages && UseISM, "only for ISM large pages"); 3147 3148 size_t size = bytes; 3149 char* retAddr = NULL; 3150 int shmid; 3151 key_t ismKey; 3152 3153 bool warn_on_failure = UseISM && 3154 (!FLAG_IS_DEFAULT(UseLargePages) || 3155 !FLAG_IS_DEFAULT(UseISM) || 3156 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3157 ); 3158 char msg[128]; 3159 3160 ismKey = IPC_PRIVATE; 3161 3162 // Create a large shared memory region to attach to based on size. 3163 // Currently, size is the total size of the heap 3164 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3165 if (shmid == -1){ 3166 if (warn_on_failure) { 3167 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3168 warning(msg); 3169 } 3170 return NULL; 3171 } 3172 3173 // Attach to the region 3174 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3175 int err = errno; 3176 3177 // Remove shmid. If shmat() is successful, the actual shared memory segment 3178 // will be deleted when it's detached by shmdt() or when the process 3179 // terminates. If shmat() is not successful this will remove the shared 3180 // segment immediately. 3181 shmctl(shmid, IPC_RMID, NULL); 3182 3183 if (retAddr == (char *) -1) { 3184 if (warn_on_failure) { 3185 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3186 warning(msg); 3187 } 3188 return NULL; 3189 } 3190 3191 return retAddr; 3192} 3193 3194bool os::release_memory_special(char* base, size_t bytes) { 3195 // detaching the SHM segment will also delete it, see reserve_memory_special() 3196 int rslt = shmdt(base); 3197 return rslt == 0; 3198} 3199 3200size_t os::large_page_size() { 3201 return _large_page_size; 3202} 3203 3204// MPSS allows application to commit large page memory on demand; with ISM 3205// the entire memory region must be allocated as shared memory. 3206bool os::can_commit_large_page_memory() { 3207 return UseISM ? false : true; 3208} 3209 3210bool os::can_execute_large_page_memory() { 3211 return UseISM ? false : true; 3212} 3213 3214static int os_sleep(jlong millis, bool interruptible) { 3215 const jlong limit = INT_MAX; 3216 jlong prevtime; 3217 int res; 3218 3219 while (millis > limit) { 3220 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3221 return res; 3222 millis -= limit; 3223 } 3224 3225 // Restart interrupted polls with new parameters until the proper delay 3226 // has been completed. 3227 3228 prevtime = getTimeMillis(); 3229 3230 while (millis > 0) { 3231 jlong newtime; 3232 3233 if (!interruptible) { 3234 // Following assert fails for os::yield_all: 3235 // assert(!thread->is_Java_thread(), "must not be java thread"); 3236 res = poll(NULL, 0, millis); 3237 } else { 3238 JavaThread *jt = JavaThread::current(); 3239 3240 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3241 os::Solaris::clear_interrupted); 3242 } 3243 3244 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3245 // thread.Interrupt. 3246 3247 if((res == OS_ERR) && (errno == EINTR)) { 3248 newtime = getTimeMillis(); 3249 assert(newtime >= prevtime, "time moving backwards"); 3250 /* Doing prevtime and newtime in microseconds doesn't help precision, 3251 and trying to round up to avoid lost milliseconds can result in a 3252 too-short delay. */ 3253 millis -= newtime - prevtime; 3254 if(millis <= 0) 3255 return OS_OK; 3256 prevtime = newtime; 3257 } else 3258 return res; 3259 } 3260 3261 return OS_OK; 3262} 3263 3264// Read calls from inside the vm need to perform state transitions 3265size_t os::read(int fd, void *buf, unsigned int nBytes) { 3266 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3267} 3268 3269int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3270 assert(thread == Thread::current(), "thread consistency check"); 3271 3272 // TODO-FIXME: this should be removed. 3273 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3274 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3275 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3276 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3277 // is fooled into believing that the system is making progress. In the code below we block the 3278 // the watcher thread while safepoint is in progress so that it would not appear as though the 3279 // system is making progress. 3280 if (!Solaris::T2_libthread() && 3281 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3282 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3283 // the entire safepoint, the watcher thread will line up here during the safepoint. 3284 Threads_lock->lock_without_safepoint_check(); 3285 Threads_lock->unlock(); 3286 } 3287 3288 if (thread->is_Java_thread()) { 3289 // This is a JavaThread so we honor the _thread_blocked protocol 3290 // even for sleeps of 0 milliseconds. This was originally done 3291 // as a workaround for bug 4338139. However, now we also do it 3292 // to honor the suspend-equivalent protocol. 3293 3294 JavaThread *jt = (JavaThread *) thread; 3295 ThreadBlockInVM tbivm(jt); 3296 3297 jt->set_suspend_equivalent(); 3298 // cleared by handle_special_suspend_equivalent_condition() or 3299 // java_suspend_self() via check_and_wait_while_suspended() 3300 3301 int ret_code; 3302 if (millis <= 0) { 3303 thr_yield(); 3304 ret_code = 0; 3305 } else { 3306 // The original sleep() implementation did not create an 3307 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3308 // I'm preserving that decision for now. 3309 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3310 3311 ret_code = os_sleep(millis, interruptible); 3312 } 3313 3314 // were we externally suspended while we were waiting? 3315 jt->check_and_wait_while_suspended(); 3316 3317 return ret_code; 3318 } 3319 3320 // non-JavaThread from this point on: 3321 3322 if (millis <= 0) { 3323 thr_yield(); 3324 return 0; 3325 } 3326 3327 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3328 3329 return os_sleep(millis, interruptible); 3330} 3331 3332int os::naked_sleep() { 3333 // %% make the sleep time an integer flag. for now use 1 millisec. 3334 return os_sleep(1, false); 3335} 3336 3337// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3338void os::infinite_sleep() { 3339 while (true) { // sleep forever ... 3340 ::sleep(100); // ... 100 seconds at a time 3341 } 3342} 3343 3344// Used to convert frequent JVM_Yield() to nops 3345bool os::dont_yield() { 3346 if (DontYieldALot) { 3347 static hrtime_t last_time = 0; 3348 hrtime_t diff = getTimeNanos() - last_time; 3349 3350 if (diff < DontYieldALotInterval * 1000000) 3351 return true; 3352 3353 last_time += diff; 3354 3355 return false; 3356 } 3357 else { 3358 return false; 3359 } 3360} 3361 3362// Caveat: Solaris os::yield() causes a thread-state transition whereas 3363// the linux and win32 implementations do not. This should be checked. 3364 3365void os::yield() { 3366 // Yields to all threads with same or greater priority 3367 os::sleep(Thread::current(), 0, false); 3368} 3369 3370// Note that yield semantics are defined by the scheduling class to which 3371// the thread currently belongs. Typically, yield will _not yield to 3372// other equal or higher priority threads that reside on the dispatch queues 3373// of other CPUs. 3374 3375os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3376 3377 3378// On Solaris we found that yield_all doesn't always yield to all other threads. 3379// There have been cases where there is a thread ready to execute but it doesn't 3380// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3381// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3382// SIGWAITING signal which will cause a new lwp to be created. So we count the 3383// number of times yield_all is called in the one loop and increase the sleep 3384// time after 8 attempts. If this fails too we increase the concurrency level 3385// so that the starving thread would get an lwp 3386 3387void os::yield_all(int attempts) { 3388 // Yields to all threads, including threads with lower priorities 3389 if (attempts == 0) { 3390 os::sleep(Thread::current(), 1, false); 3391 } else { 3392 int iterations = attempts % 30; 3393 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3394 // thr_setconcurrency and _getconcurrency make sense only under T1. 3395 int noofLWPS = thr_getconcurrency(); 3396 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3397 thr_setconcurrency(thr_getconcurrency() + 1); 3398 } 3399 } else if (iterations < 25) { 3400 os::sleep(Thread::current(), 1, false); 3401 } else { 3402 os::sleep(Thread::current(), 10, false); 3403 } 3404 } 3405} 3406 3407// Called from the tight loops to possibly influence time-sharing heuristics 3408void os::loop_breaker(int attempts) { 3409 os::yield_all(attempts); 3410} 3411 3412 3413// Interface for setting lwp priorities. If we are using T2 libthread, 3414// which forces the use of BoundThreads or we manually set UseBoundThreads, 3415// all of our threads will be assigned to real lwp's. Using the thr_setprio 3416// function is meaningless in this mode so we must adjust the real lwp's priority 3417// The routines below implement the getting and setting of lwp priorities. 3418// 3419// Note: There are three priority scales used on Solaris. Java priotities 3420// which range from 1 to 10, libthread "thr_setprio" scale which range 3421// from 0 to 127, and the current scheduling class of the process we 3422// are running in. This is typically from -60 to +60. 3423// The setting of the lwp priorities in done after a call to thr_setprio 3424// so Java priorities are mapped to libthread priorities and we map from 3425// the latter to lwp priorities. We don't keep priorities stored in 3426// Java priorities since some of our worker threads want to set priorities 3427// higher than all Java threads. 3428// 3429// For related information: 3430// (1) man -s 2 priocntl 3431// (2) man -s 4 priocntl 3432// (3) man dispadmin 3433// = librt.so 3434// = libthread/common/rtsched.c - thrp_setlwpprio(). 3435// = ps -cL <pid> ... to validate priority. 3436// = sched_get_priority_min and _max 3437// pthread_create 3438// sched_setparam 3439// pthread_setschedparam 3440// 3441// Assumptions: 3442// + We assume that all threads in the process belong to the same 3443// scheduling class. IE. an homogenous process. 3444// + Must be root or in IA group to change change "interactive" attribute. 3445// Priocntl() will fail silently. The only indication of failure is when 3446// we read-back the value and notice that it hasn't changed. 3447// + Interactive threads enter the runq at the head, non-interactive at the tail. 3448// + For RT, change timeslice as well. Invariant: 3449// constant "priority integral" 3450// Konst == TimeSlice * (60-Priority) 3451// Given a priority, compute appropriate timeslice. 3452// + Higher numerical values have higher priority. 3453 3454// sched class attributes 3455typedef struct { 3456 int schedPolicy; // classID 3457 int maxPrio; 3458 int minPrio; 3459} SchedInfo; 3460 3461 3462static SchedInfo tsLimits, iaLimits, rtLimits; 3463 3464#ifdef ASSERT 3465static int ReadBackValidate = 1; 3466#endif 3467static int myClass = 0; 3468static int myMin = 0; 3469static int myMax = 0; 3470static int myCur = 0; 3471static bool priocntl_enable = false; 3472 3473 3474// Call the version of priocntl suitable for all supported versions 3475// of Solaris. We need to call through this wrapper so that we can 3476// build on Solaris 9 and run on Solaris 8, 9 and 10. 3477// 3478// This code should be removed if we ever stop supporting Solaris 8 3479// and earlier releases. 3480 3481static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3482typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3483static priocntl_type priocntl_ptr = priocntl_stub; 3484 3485// Stub to set the value of the real pointer, and then call the real 3486// function. 3487 3488static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3489 // Try Solaris 8- name only. 3490 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3491 guarantee(tmp != NULL, "priocntl function not found."); 3492 priocntl_ptr = tmp; 3493 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3494} 3495 3496 3497// lwp_priocntl_init 3498// 3499// Try to determine the priority scale for our process. 3500// 3501// Return errno or 0 if OK. 3502// 3503static 3504int lwp_priocntl_init () 3505{ 3506 int rslt; 3507 pcinfo_t ClassInfo; 3508 pcparms_t ParmInfo; 3509 int i; 3510 3511 if (!UseThreadPriorities) return 0; 3512 3513 // We are using Bound threads, we need to determine our priority ranges 3514 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3515 // If ThreadPriorityPolicy is 1, switch tables 3516 if (ThreadPriorityPolicy == 1) { 3517 for (i = 0 ; i < MaxPriority+1; i++) 3518 os::java_to_os_priority[i] = prio_policy1[i]; 3519 } 3520 } 3521 // Not using Bound Threads, set to ThreadPolicy 1 3522 else { 3523 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3524 os::java_to_os_priority[i] = prio_policy1[i]; 3525 } 3526 return 0; 3527 } 3528 3529 3530 // Get IDs for a set of well-known scheduling classes. 3531 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3532 // the system. We should have a loop that iterates over the 3533 // classID values, which are known to be "small" integers. 3534 3535 strcpy(ClassInfo.pc_clname, "TS"); 3536 ClassInfo.pc_cid = -1; 3537 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3538 if (rslt < 0) return errno; 3539 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3540 tsLimits.schedPolicy = ClassInfo.pc_cid; 3541 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3542 tsLimits.minPrio = -tsLimits.maxPrio; 3543 3544 strcpy(ClassInfo.pc_clname, "IA"); 3545 ClassInfo.pc_cid = -1; 3546 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3547 if (rslt < 0) return errno; 3548 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3549 iaLimits.schedPolicy = ClassInfo.pc_cid; 3550 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3551 iaLimits.minPrio = -iaLimits.maxPrio; 3552 3553 strcpy(ClassInfo.pc_clname, "RT"); 3554 ClassInfo.pc_cid = -1; 3555 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3556 if (rslt < 0) return errno; 3557 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3558 rtLimits.schedPolicy = ClassInfo.pc_cid; 3559 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3560 rtLimits.minPrio = 0; 3561 3562 3563 // Query our "current" scheduling class. 3564 // This will normally be IA,TS or, rarely, RT. 3565 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3566 ParmInfo.pc_cid = PC_CLNULL; 3567 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3568 if ( rslt < 0 ) return errno; 3569 myClass = ParmInfo.pc_cid; 3570 3571 // We now know our scheduling classId, get specific information 3572 // the class. 3573 ClassInfo.pc_cid = myClass; 3574 ClassInfo.pc_clname[0] = 0; 3575 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3576 if ( rslt < 0 ) return errno; 3577 3578 if (ThreadPriorityVerbose) 3579 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3580 3581 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3582 ParmInfo.pc_cid = PC_CLNULL; 3583 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3584 if (rslt < 0) return errno; 3585 3586 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3587 myMin = rtLimits.minPrio; 3588 myMax = rtLimits.maxPrio; 3589 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3590 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3591 myMin = iaLimits.minPrio; 3592 myMax = iaLimits.maxPrio; 3593 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3594 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3595 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3596 myMin = tsLimits.minPrio; 3597 myMax = tsLimits.maxPrio; 3598 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3599 } else { 3600 // No clue - punt 3601 if (ThreadPriorityVerbose) 3602 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3603 return EINVAL; // no clue, punt 3604 } 3605 3606 if (ThreadPriorityVerbose) 3607 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3608 3609 priocntl_enable = true; // Enable changing priorities 3610 return 0; 3611} 3612 3613#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3614#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3615#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3616 3617 3618// scale_to_lwp_priority 3619// 3620// Convert from the libthread "thr_setprio" scale to our current 3621// lwp scheduling class scale. 3622// 3623static 3624int scale_to_lwp_priority (int rMin, int rMax, int x) 3625{ 3626 int v; 3627 3628 if (x == 127) return rMax; // avoid round-down 3629 v = (((x*(rMax-rMin)))/128)+rMin; 3630 return v; 3631} 3632 3633 3634// set_lwp_priority 3635// 3636// Set the priority of the lwp. This call should only be made 3637// when using bound threads (T2 threads are bound by default). 3638// 3639int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3640{ 3641 int rslt; 3642 int Actual, Expected, prv; 3643 pcparms_t ParmInfo; // for GET-SET 3644#ifdef ASSERT 3645 pcparms_t ReadBack; // for readback 3646#endif 3647 3648 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3649 // Query current values. 3650 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3651 // Cache "pcparms_t" in global ParmCache. 3652 // TODO: elide set-to-same-value 3653 3654 // If something went wrong on init, don't change priorities. 3655 if ( !priocntl_enable ) { 3656 if (ThreadPriorityVerbose) 3657 tty->print_cr("Trying to set priority but init failed, ignoring"); 3658 return EINVAL; 3659 } 3660 3661 3662 // If lwp hasn't started yet, just return 3663 // the _start routine will call us again. 3664 if ( lwpid <= 0 ) { 3665 if (ThreadPriorityVerbose) { 3666 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3667 ThreadID, newPrio); 3668 } 3669 return 0; 3670 } 3671 3672 if (ThreadPriorityVerbose) { 3673 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3674 ThreadID, lwpid, newPrio); 3675 } 3676 3677 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3678 ParmInfo.pc_cid = PC_CLNULL; 3679 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3680 if (rslt < 0) return errno; 3681 3682 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3683 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3684 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3685 rtInfo->rt_tqsecs = RT_NOCHANGE; 3686 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3687 if (ThreadPriorityVerbose) { 3688 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3689 } 3690 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3691 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3692 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3693 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3694 iaInfo->ia_uprilim = IA_NOCHANGE; 3695 iaInfo->ia_nice = IA_NOCHANGE; 3696 iaInfo->ia_mode = IA_NOCHANGE; 3697 if (ThreadPriorityVerbose) { 3698 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3699 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3700 } 3701 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3702 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3703 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3704 prv = tsInfo->ts_upri; 3705 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3706 tsInfo->ts_uprilim = IA_NOCHANGE; 3707 if (ThreadPriorityVerbose) { 3708 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3709 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3710 } 3711 if (prv == tsInfo->ts_upri) return 0; 3712 } else { 3713 if ( ThreadPriorityVerbose ) { 3714 tty->print_cr ("Unknown scheduling class\n"); 3715 } 3716 return EINVAL; // no clue, punt 3717 } 3718 3719 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3720 if (ThreadPriorityVerbose && rslt) { 3721 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3722 } 3723 if (rslt < 0) return errno; 3724 3725#ifdef ASSERT 3726 // Sanity check: read back what we just attempted to set. 3727 // In theory it could have changed in the interim ... 3728 // 3729 // The priocntl system call is tricky. 3730 // Sometimes it'll validate the priority value argument and 3731 // return EINVAL if unhappy. At other times it fails silently. 3732 // Readbacks are prudent. 3733 3734 if (!ReadBackValidate) return 0; 3735 3736 memset(&ReadBack, 0, sizeof(pcparms_t)); 3737 ReadBack.pc_cid = PC_CLNULL; 3738 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3739 assert(rslt >= 0, "priocntl failed"); 3740 Actual = Expected = 0xBAD; 3741 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3742 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3743 Actual = RTPRI(ReadBack)->rt_pri; 3744 Expected = RTPRI(ParmInfo)->rt_pri; 3745 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3746 Actual = IAPRI(ReadBack)->ia_upri; 3747 Expected = IAPRI(ParmInfo)->ia_upri; 3748 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3749 Actual = TSPRI(ReadBack)->ts_upri; 3750 Expected = TSPRI(ParmInfo)->ts_upri; 3751 } else { 3752 if ( ThreadPriorityVerbose ) { 3753 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3754 } 3755 } 3756 3757 if (Actual != Expected) { 3758 if ( ThreadPriorityVerbose ) { 3759 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3760 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3761 } 3762 } 3763#endif 3764 3765 return 0; 3766} 3767 3768 3769 3770// Solaris only gives access to 128 real priorities at a time, 3771// so we expand Java's ten to fill this range. This would be better 3772// if we dynamically adjusted relative priorities. 3773// 3774// The ThreadPriorityPolicy option allows us to select 2 different 3775// priority scales. 3776// 3777// ThreadPriorityPolicy=0 3778// Since the Solaris' default priority is MaximumPriority, we do not 3779// set a priority lower than Max unless a priority lower than 3780// NormPriority is requested. 3781// 3782// ThreadPriorityPolicy=1 3783// This mode causes the priority table to get filled with 3784// linear values. NormPriority get's mapped to 50% of the 3785// Maximum priority an so on. This will cause VM threads 3786// to get unfair treatment against other Solaris processes 3787// which do not explicitly alter their thread priorities. 3788// 3789 3790 3791int os::java_to_os_priority[MaxPriority + 1] = { 3792 -99999, // 0 Entry should never be used 3793 3794 0, // 1 MinPriority 3795 32, // 2 3796 64, // 3 3797 3798 96, // 4 3799 127, // 5 NormPriority 3800 127, // 6 3801 3802 127, // 7 3803 127, // 8 3804 127, // 9 NearMaxPriority 3805 3806 127 // 10 MaxPriority 3807}; 3808 3809 3810OSReturn os::set_native_priority(Thread* thread, int newpri) { 3811 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3812 if ( !UseThreadPriorities ) return OS_OK; 3813 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3814 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3815 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3816 thread->osthread()->lwp_id(), newpri )); 3817 return (status == 0) ? OS_OK : OS_ERR; 3818} 3819 3820 3821OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3822 int p; 3823 if ( !UseThreadPriorities ) { 3824 *priority_ptr = NormalPriority; 3825 return OS_OK; 3826 } 3827 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3828 if (status != 0) { 3829 return OS_ERR; 3830 } 3831 *priority_ptr = p; 3832 return OS_OK; 3833} 3834 3835 3836// Hint to the underlying OS that a task switch would not be good. 3837// Void return because it's a hint and can fail. 3838void os::hint_no_preempt() { 3839 schedctl_start(schedctl_init()); 3840} 3841 3842void os::interrupt(Thread* thread) { 3843 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3844 3845 OSThread* osthread = thread->osthread(); 3846 3847 int isInterrupted = osthread->interrupted(); 3848 if (!isInterrupted) { 3849 osthread->set_interrupted(true); 3850 OrderAccess::fence(); 3851 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3852 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3853 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3854 ParkEvent * const slp = thread->_SleepEvent ; 3855 if (slp != NULL) slp->unpark() ; 3856 } 3857 3858 // For JSR166: unpark after setting status but before thr_kill -dl 3859 if (thread->is_Java_thread()) { 3860 ((JavaThread*)thread)->parker()->unpark(); 3861 } 3862 3863 // Handle interruptible wait() ... 3864 ParkEvent * const ev = thread->_ParkEvent ; 3865 if (ev != NULL) ev->unpark() ; 3866 3867 // When events are used everywhere for os::sleep, then this thr_kill 3868 // will only be needed if UseVMInterruptibleIO is true. 3869 3870 if (!isInterrupted) { 3871 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3872 assert_status(status == 0, status, "thr_kill"); 3873 3874 // Bump thread interruption counter 3875 RuntimeService::record_thread_interrupt_signaled_count(); 3876 } 3877} 3878 3879 3880bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3881 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3882 3883 OSThread* osthread = thread->osthread(); 3884 3885 bool res = osthread->interrupted(); 3886 3887 // NOTE that since there is no "lock" around these two operations, 3888 // there is the possibility that the interrupted flag will be 3889 // "false" but that the interrupt event will be set. This is 3890 // intentional. The effect of this is that Object.wait() will appear 3891 // to have a spurious wakeup, which is not harmful, and the 3892 // possibility is so rare that it is not worth the added complexity 3893 // to add yet another lock. It has also been recommended not to put 3894 // the interrupted flag into the os::Solaris::Event structure, 3895 // because it hides the issue. 3896 if (res && clear_interrupted) { 3897 osthread->set_interrupted(false); 3898 } 3899 return res; 3900} 3901 3902 3903void os::print_statistics() { 3904} 3905 3906int os::message_box(const char* title, const char* message) { 3907 int i; 3908 fdStream err(defaultStream::error_fd()); 3909 for (i = 0; i < 78; i++) err.print_raw("="); 3910 err.cr(); 3911 err.print_raw_cr(title); 3912 for (i = 0; i < 78; i++) err.print_raw("-"); 3913 err.cr(); 3914 err.print_raw_cr(message); 3915 for (i = 0; i < 78; i++) err.print_raw("="); 3916 err.cr(); 3917 3918 char buf[16]; 3919 // Prevent process from exiting upon "read error" without consuming all CPU 3920 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3921 3922 return buf[0] == 'y' || buf[0] == 'Y'; 3923} 3924 3925// A lightweight implementation that does not suspend the target thread and 3926// thus returns only a hint. Used for profiling only! 3927ExtendedPC os::get_thread_pc(Thread* thread) { 3928 // Make sure that it is called by the watcher and the Threads lock is owned. 3929 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3930 // For now, is only used to profile the VM Thread 3931 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3932 ExtendedPC epc; 3933 3934 GetThreadPC_Callback cb(ProfileVM_lock); 3935 OSThread *osthread = thread->osthread(); 3936 const int time_to_wait = 400; // 400ms wait for initial response 3937 int status = cb.interrupt(thread, time_to_wait); 3938 3939 if (cb.is_done() ) { 3940 epc = cb.addr(); 3941 } else { 3942 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 3943 osthread->thread_id(), status);); 3944 // epc is already NULL 3945 } 3946 return epc; 3947} 3948 3949 3950// This does not do anything on Solaris. This is basically a hook for being 3951// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3952void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3953 f(value, method, args, thread); 3954} 3955 3956// This routine may be used by user applications as a "hook" to catch signals. 3957// The user-defined signal handler must pass unrecognized signals to this 3958// routine, and if it returns true (non-zero), then the signal handler must 3959// return immediately. If the flag "abort_if_unrecognized" is true, then this 3960// routine will never retun false (zero), but instead will execute a VM panic 3961// routine kill the process. 3962// 3963// If this routine returns false, it is OK to call it again. This allows 3964// the user-defined signal handler to perform checks either before or after 3965// the VM performs its own checks. Naturally, the user code would be making 3966// a serious error if it tried to handle an exception (such as a null check 3967// or breakpoint) that the VM was generating for its own correct operation. 3968// 3969// This routine may recognize any of the following kinds of signals: 3970// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3971// os::Solaris::SIGasync 3972// It should be consulted by handlers for any of those signals. 3973// It explicitly does not recognize os::Solaris::SIGinterrupt 3974// 3975// The caller of this routine must pass in the three arguments supplied 3976// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3977// field of the structure passed to sigaction(). This routine assumes that 3978// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3979// 3980// Note that the VM will print warnings if it detects conflicting signal 3981// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3982// 3983extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 3984 3985 3986void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3987 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3988} 3989 3990/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 3991 is needed to provoke threads blocked on IO to return an EINTR 3992 Note: this explicitly does NOT call JVM_handle_solaris_signal and 3993 does NOT participate in signal chaining due to requirement for 3994 NOT setting SA_RESTART to make EINTR work. */ 3995extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3996 if (UseSignalChaining) { 3997 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3998 if (actp && actp->sa_handler) { 3999 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4000 } 4001 } 4002} 4003 4004// This boolean allows users to forward their own non-matching signals 4005// to JVM_handle_solaris_signal, harmlessly. 4006bool os::Solaris::signal_handlers_are_installed = false; 4007 4008// For signal-chaining 4009bool os::Solaris::libjsig_is_loaded = false; 4010typedef struct sigaction *(*get_signal_t)(int); 4011get_signal_t os::Solaris::get_signal_action = NULL; 4012 4013struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4014 struct sigaction *actp = NULL; 4015 4016 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4017 // Retrieve the old signal handler from libjsig 4018 actp = (*get_signal_action)(sig); 4019 } 4020 if (actp == NULL) { 4021 // Retrieve the preinstalled signal handler from jvm 4022 actp = get_preinstalled_handler(sig); 4023 } 4024 4025 return actp; 4026} 4027 4028static bool call_chained_handler(struct sigaction *actp, int sig, 4029 siginfo_t *siginfo, void *context) { 4030 // Call the old signal handler 4031 if (actp->sa_handler == SIG_DFL) { 4032 // It's more reasonable to let jvm treat it as an unexpected exception 4033 // instead of taking the default action. 4034 return false; 4035 } else if (actp->sa_handler != SIG_IGN) { 4036 if ((actp->sa_flags & SA_NODEFER) == 0) { 4037 // automaticlly block the signal 4038 sigaddset(&(actp->sa_mask), sig); 4039 } 4040 4041 sa_handler_t hand; 4042 sa_sigaction_t sa; 4043 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4044 // retrieve the chained handler 4045 if (siginfo_flag_set) { 4046 sa = actp->sa_sigaction; 4047 } else { 4048 hand = actp->sa_handler; 4049 } 4050 4051 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4052 actp->sa_handler = SIG_DFL; 4053 } 4054 4055 // try to honor the signal mask 4056 sigset_t oset; 4057 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4058 4059 // call into the chained handler 4060 if (siginfo_flag_set) { 4061 (*sa)(sig, siginfo, context); 4062 } else { 4063 (*hand)(sig); 4064 } 4065 4066 // restore the signal mask 4067 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4068 } 4069 // Tell jvm's signal handler the signal is taken care of. 4070 return true; 4071} 4072 4073bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4074 bool chained = false; 4075 // signal-chaining 4076 if (UseSignalChaining) { 4077 struct sigaction *actp = get_chained_signal_action(sig); 4078 if (actp != NULL) { 4079 chained = call_chained_handler(actp, sig, siginfo, context); 4080 } 4081 } 4082 return chained; 4083} 4084 4085struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4086 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4087 if (preinstalled_sigs[sig] != 0) { 4088 return &chainedsigactions[sig]; 4089 } 4090 return NULL; 4091} 4092 4093void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4094 4095 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4096 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4097 chainedsigactions[sig] = oldAct; 4098 preinstalled_sigs[sig] = 1; 4099} 4100 4101void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4102 // Check for overwrite. 4103 struct sigaction oldAct; 4104 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4105 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4106 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4107 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4108 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4109 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4110 if (AllowUserSignalHandlers || !set_installed) { 4111 // Do not overwrite; user takes responsibility to forward to us. 4112 return; 4113 } else if (UseSignalChaining) { 4114 if (oktochain) { 4115 // save the old handler in jvm 4116 save_preinstalled_handler(sig, oldAct); 4117 } else { 4118 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4119 } 4120 // libjsig also interposes the sigaction() call below and saves the 4121 // old sigaction on it own. 4122 } else { 4123 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4124 } 4125 } 4126 4127 struct sigaction sigAct; 4128 sigfillset(&(sigAct.sa_mask)); 4129 sigAct.sa_handler = SIG_DFL; 4130 4131 sigAct.sa_sigaction = signalHandler; 4132 // Handle SIGSEGV on alternate signal stack if 4133 // not using stack banging 4134 if (!UseStackBanging && sig == SIGSEGV) { 4135 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4136 // Interruptible i/o requires SA_RESTART cleared so EINTR 4137 // is returned instead of restarting system calls 4138 } else if (sig == os::Solaris::SIGinterrupt()) { 4139 sigemptyset(&sigAct.sa_mask); 4140 sigAct.sa_handler = NULL; 4141 sigAct.sa_flags = SA_SIGINFO; 4142 sigAct.sa_sigaction = sigINTRHandler; 4143 } else { 4144 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4145 } 4146 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4147 4148 sigaction(sig, &sigAct, &oldAct); 4149 4150 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4151 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4152 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4153} 4154 4155 4156#define DO_SIGNAL_CHECK(sig) \ 4157 if (!sigismember(&check_signal_done, sig)) \ 4158 os::Solaris::check_signal_handler(sig) 4159 4160// This method is a periodic task to check for misbehaving JNI applications 4161// under CheckJNI, we can add any periodic checks here 4162 4163void os::run_periodic_checks() { 4164 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4165 // thereby preventing a NULL checks. 4166 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4167 4168 if (check_signals == false) return; 4169 4170 // SEGV and BUS if overridden could potentially prevent 4171 // generation of hs*.log in the event of a crash, debugging 4172 // such a case can be very challenging, so we absolutely 4173 // check for the following for a good measure: 4174 DO_SIGNAL_CHECK(SIGSEGV); 4175 DO_SIGNAL_CHECK(SIGILL); 4176 DO_SIGNAL_CHECK(SIGFPE); 4177 DO_SIGNAL_CHECK(SIGBUS); 4178 DO_SIGNAL_CHECK(SIGPIPE); 4179 DO_SIGNAL_CHECK(SIGXFSZ); 4180 4181 // ReduceSignalUsage allows the user to override these handlers 4182 // see comments at the very top and jvm_solaris.h 4183 if (!ReduceSignalUsage) { 4184 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4185 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4186 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4187 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4188 } 4189 4190 // See comments above for using JVM1/JVM2 and UseAltSigs 4191 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4192 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4193 4194} 4195 4196typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4197 4198static os_sigaction_t os_sigaction = NULL; 4199 4200void os::Solaris::check_signal_handler(int sig) { 4201 char buf[O_BUFLEN]; 4202 address jvmHandler = NULL; 4203 4204 struct sigaction act; 4205 if (os_sigaction == NULL) { 4206 // only trust the default sigaction, in case it has been interposed 4207 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4208 if (os_sigaction == NULL) return; 4209 } 4210 4211 os_sigaction(sig, (struct sigaction*)NULL, &act); 4212 4213 address thisHandler = (act.sa_flags & SA_SIGINFO) 4214 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4215 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4216 4217 4218 switch(sig) { 4219 case SIGSEGV: 4220 case SIGBUS: 4221 case SIGFPE: 4222 case SIGPIPE: 4223 case SIGXFSZ: 4224 case SIGILL: 4225 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4226 break; 4227 4228 case SHUTDOWN1_SIGNAL: 4229 case SHUTDOWN2_SIGNAL: 4230 case SHUTDOWN3_SIGNAL: 4231 case BREAK_SIGNAL: 4232 jvmHandler = (address)user_handler(); 4233 break; 4234 4235 default: 4236 int intrsig = os::Solaris::SIGinterrupt(); 4237 int asynsig = os::Solaris::SIGasync(); 4238 4239 if (sig == intrsig) { 4240 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4241 } else if (sig == asynsig) { 4242 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4243 } else { 4244 return; 4245 } 4246 break; 4247 } 4248 4249 4250 if (thisHandler != jvmHandler) { 4251 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4252 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4253 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4254 // No need to check this sig any longer 4255 sigaddset(&check_signal_done, sig); 4256 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4257 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4258 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4259 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4260 // No need to check this sig any longer 4261 sigaddset(&check_signal_done, sig); 4262 } 4263 4264 // Print all the signal handler state 4265 if (sigismember(&check_signal_done, sig)) { 4266 print_signal_handlers(tty, buf, O_BUFLEN); 4267 } 4268 4269} 4270 4271void os::Solaris::install_signal_handlers() { 4272 bool libjsigdone = false; 4273 signal_handlers_are_installed = true; 4274 4275 // signal-chaining 4276 typedef void (*signal_setting_t)(); 4277 signal_setting_t begin_signal_setting = NULL; 4278 signal_setting_t end_signal_setting = NULL; 4279 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4280 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4281 if (begin_signal_setting != NULL) { 4282 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4283 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4284 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4285 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4286 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4287 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4288 libjsig_is_loaded = true; 4289 if (os::Solaris::get_libjsig_version != NULL) { 4290 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4291 } 4292 assert(UseSignalChaining, "should enable signal-chaining"); 4293 } 4294 if (libjsig_is_loaded) { 4295 // Tell libjsig jvm is setting signal handlers 4296 (*begin_signal_setting)(); 4297 } 4298 4299 set_signal_handler(SIGSEGV, true, true); 4300 set_signal_handler(SIGPIPE, true, true); 4301 set_signal_handler(SIGXFSZ, true, true); 4302 set_signal_handler(SIGBUS, true, true); 4303 set_signal_handler(SIGILL, true, true); 4304 set_signal_handler(SIGFPE, true, true); 4305 4306 4307 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4308 4309 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4310 // can not register overridable signals which might be > 32 4311 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4312 // Tell libjsig jvm has finished setting signal handlers 4313 (*end_signal_setting)(); 4314 libjsigdone = true; 4315 } 4316 } 4317 4318 // Never ok to chain our SIGinterrupt 4319 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4320 set_signal_handler(os::Solaris::SIGasync(), true, true); 4321 4322 if (libjsig_is_loaded && !libjsigdone) { 4323 // Tell libjsig jvm finishes setting signal handlers 4324 (*end_signal_setting)(); 4325 } 4326 4327 // We don't activate signal checker if libjsig is in place, we trust ourselves 4328 // and if UserSignalHandler is installed all bets are off 4329 if (CheckJNICalls) { 4330 if (libjsig_is_loaded) { 4331 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4332 check_signals = false; 4333 } 4334 if (AllowUserSignalHandlers) { 4335 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4336 check_signals = false; 4337 } 4338 } 4339} 4340 4341 4342void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4343 4344const char * signames[] = { 4345 "SIG0", 4346 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4347 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4348 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4349 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4350 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4351 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4352 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4353 "SIGCANCEL", "SIGLOST" 4354}; 4355 4356const char* os::exception_name(int exception_code, char* buf, size_t size) { 4357 if (0 < exception_code && exception_code <= SIGRTMAX) { 4358 // signal 4359 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4360 jio_snprintf(buf, size, "%s", signames[exception_code]); 4361 } else { 4362 jio_snprintf(buf, size, "SIG%d", exception_code); 4363 } 4364 return buf; 4365 } else { 4366 return NULL; 4367 } 4368} 4369 4370// (Static) wrappers for the new libthread API 4371int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4372int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4373int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4374int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4375int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4376 4377// (Static) wrappers for the liblgrp API 4378os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4379os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4380os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4381os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4382os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4383os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4384os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4385os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4386os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4387 4388// (Static) wrapper for meminfo() call. 4389os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4390 4391static address resolve_symbol(const char *name) { 4392 address addr; 4393 4394 addr = (address) dlsym(RTLD_DEFAULT, name); 4395 if(addr == NULL) { 4396 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4397 addr = (address) dlsym(RTLD_NEXT, name); 4398 if(addr == NULL) { 4399 fatal(dlerror()); 4400 } 4401 } 4402 return addr; 4403} 4404 4405 4406 4407// isT2_libthread() 4408// 4409// Routine to determine if we are currently using the new T2 libthread. 4410// 4411// We determine if we are using T2 by reading /proc/self/lstatus and 4412// looking for a thread with the ASLWP bit set. If we find this status 4413// bit set, we must assume that we are NOT using T2. The T2 team 4414// has approved this algorithm. 4415// 4416// We need to determine if we are running with the new T2 libthread 4417// since setting native thread priorities is handled differently 4418// when using this library. All threads created using T2 are bound 4419// threads. Calling thr_setprio is meaningless in this case. 4420// 4421bool isT2_libthread() { 4422 static prheader_t * lwpArray = NULL; 4423 static int lwpSize = 0; 4424 static int lwpFile = -1; 4425 lwpstatus_t * that; 4426 char lwpName [128]; 4427 bool isT2 = false; 4428 4429#define ADR(x) ((uintptr_t)(x)) 4430#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4431 4432 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4433 if (lwpFile < 0) { 4434 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4435 return false; 4436 } 4437 lwpSize = 16*1024; 4438 for (;;) { 4439 lseek (lwpFile, 0, SEEK_SET); 4440 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4441 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4442 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4443 break; 4444 } 4445 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4446 // We got a good snapshot - now iterate over the list. 4447 int aslwpcount = 0; 4448 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4449 that = LWPINDEX(lwpArray,i); 4450 if (that->pr_flags & PR_ASLWP) { 4451 aslwpcount++; 4452 } 4453 } 4454 if (aslwpcount == 0) isT2 = true; 4455 break; 4456 } 4457 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4458 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4459 } 4460 4461 FREE_C_HEAP_ARRAY(char, lwpArray); 4462 close (lwpFile); 4463 if (ThreadPriorityVerbose) { 4464 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4465 else tty->print_cr("We are not running with a T2 libthread\n"); 4466 } 4467 return isT2; 4468} 4469 4470 4471void os::Solaris::libthread_init() { 4472 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4473 4474 // Determine if we are running with the new T2 libthread 4475 os::Solaris::set_T2_libthread(isT2_libthread()); 4476 4477 lwp_priocntl_init(); 4478 4479 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4480 if(func == NULL) { 4481 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4482 // Guarantee that this VM is running on an new enough OS (5.6 or 4483 // later) that it will have a new enough libthread.so. 4484 guarantee(func != NULL, "libthread.so is too old."); 4485 } 4486 4487 // Initialize the new libthread getstate API wrappers 4488 func = resolve_symbol("thr_getstate"); 4489 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4490 4491 func = resolve_symbol("thr_setstate"); 4492 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4493 4494 func = resolve_symbol("thr_setmutator"); 4495 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4496 4497 func = resolve_symbol("thr_suspend_mutator"); 4498 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4499 4500 func = resolve_symbol("thr_continue_mutator"); 4501 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4502 4503 int size; 4504 void (*handler_info_func)(address *, int *); 4505 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4506 handler_info_func(&handler_start, &size); 4507 handler_end = handler_start + size; 4508} 4509 4510 4511int_fnP_mutex_tP os::Solaris::_mutex_lock; 4512int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4513int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4514int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4515int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4516int os::Solaris::_mutex_scope = USYNC_THREAD; 4517 4518int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4519int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4520int_fnP_cond_tP os::Solaris::_cond_signal; 4521int_fnP_cond_tP os::Solaris::_cond_broadcast; 4522int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4523int_fnP_cond_tP os::Solaris::_cond_destroy; 4524int os::Solaris::_cond_scope = USYNC_THREAD; 4525 4526void os::Solaris::synchronization_init() { 4527 if(UseLWPSynchronization) { 4528 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4529 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4530 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4531 os::Solaris::set_mutex_init(lwp_mutex_init); 4532 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4533 os::Solaris::set_mutex_scope(USYNC_THREAD); 4534 4535 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4536 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4537 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4538 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4539 os::Solaris::set_cond_init(lwp_cond_init); 4540 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4541 os::Solaris::set_cond_scope(USYNC_THREAD); 4542 } 4543 else { 4544 os::Solaris::set_mutex_scope(USYNC_THREAD); 4545 os::Solaris::set_cond_scope(USYNC_THREAD); 4546 4547 if(UsePthreads) { 4548 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4549 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4550 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4551 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4552 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4553 4554 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4555 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4556 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4557 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4558 os::Solaris::set_cond_init(pthread_cond_default_init); 4559 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4560 } 4561 else { 4562 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4563 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4564 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4565 os::Solaris::set_mutex_init(::mutex_init); 4566 os::Solaris::set_mutex_destroy(::mutex_destroy); 4567 4568 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4569 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4570 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4571 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4572 os::Solaris::set_cond_init(::cond_init); 4573 os::Solaris::set_cond_destroy(::cond_destroy); 4574 } 4575 } 4576} 4577 4578void os::Solaris::liblgrp_init() { 4579 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4580 if (handle != NULL) { 4581 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4582 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4583 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4584 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4585 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4586 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4587 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4588 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4589 dlsym(handle, "lgrp_cookie_stale"))); 4590 4591 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4592 set_lgrp_cookie(c); 4593 } else { 4594 warning("your OS does not support NUMA"); 4595 } 4596} 4597 4598void os::Solaris::misc_sym_init() { 4599 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4600 if(func == NULL) { 4601 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4602 } 4603 if (func != NULL) { 4604 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4605 } 4606} 4607 4608// Symbol doesn't exist in Solaris 8 pset.h 4609#ifndef PS_MYID 4610#define PS_MYID -3 4611#endif 4612 4613// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4614typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4615static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4616 4617void init_pset_getloadavg_ptr(void) { 4618 pset_getloadavg_ptr = 4619 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4620 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4621 warning("pset_getloadavg function not found"); 4622 } 4623} 4624 4625int os::Solaris::_dev_zero_fd = -1; 4626 4627// this is called _before_ the global arguments have been parsed 4628void os::init(void) { 4629 _initial_pid = getpid(); 4630 4631 max_hrtime = first_hrtime = gethrtime(); 4632 4633 init_random(1234567); 4634 4635 page_size = sysconf(_SC_PAGESIZE); 4636 if (page_size == -1) 4637 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4638 init_page_sizes((size_t) page_size); 4639 4640 Solaris::initialize_system_info(); 4641 4642 int fd = open("/dev/zero", O_RDWR); 4643 if (fd < 0) { 4644 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4645 } else { 4646 Solaris::set_dev_zero_fd(fd); 4647 4648 // Close on exec, child won't inherit. 4649 fcntl(fd, F_SETFD, FD_CLOEXEC); 4650 } 4651 4652 clock_tics_per_sec = CLK_TCK; 4653 4654 // check if dladdr1() exists; dladdr1 can provide more information than 4655 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4656 // and is available on linker patches for 5.7 and 5.8. 4657 // libdl.so must have been loaded, this call is just an entry lookup 4658 void * hdl = dlopen("libdl.so", RTLD_NOW); 4659 if (hdl) 4660 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4661 4662 // (Solaris only) this switches to calls that actually do locking. 4663 ThreadCritical::initialize(); 4664 4665 main_thread = thr_self(); 4666 4667 // Constant minimum stack size allowed. It must be at least 4668 // the minimum of what the OS supports (thr_min_stack()), and 4669 // enough to allow the thread to get to user bytecode execution. 4670 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4671 // If the pagesize of the VM is greater than 8K determine the appropriate 4672 // number of initial guard pages. The user can change this with the 4673 // command line arguments, if needed. 4674 if (vm_page_size() > 8*K) { 4675 StackYellowPages = 1; 4676 StackRedPages = 1; 4677 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4678 } 4679} 4680 4681// To install functions for atexit system call 4682extern "C" { 4683 static void perfMemory_exit_helper() { 4684 perfMemory_exit(); 4685 } 4686} 4687 4688// this is called _after_ the global arguments have been parsed 4689jint os::init_2(void) { 4690 // try to enable extended file IO ASAP, see 6431278 4691 os::Solaris::try_enable_extended_io(); 4692 4693 // Allocate a single page and mark it as readable for safepoint polling. Also 4694 // use this first mmap call to check support for MAP_ALIGN. 4695 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4696 page_size, 4697 MAP_PRIVATE | MAP_ALIGN, 4698 PROT_READ); 4699 if (polling_page == NULL) { 4700 has_map_align = false; 4701 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4702 PROT_READ); 4703 } 4704 4705 os::set_polling_page(polling_page); 4706 4707#ifndef PRODUCT 4708 if( Verbose && PrintMiscellaneous ) 4709 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4710#endif 4711 4712 if (!UseMembar) { 4713 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4714 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4715 os::set_memory_serialize_page( mem_serialize_page ); 4716 4717#ifndef PRODUCT 4718 if(Verbose && PrintMiscellaneous) 4719 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4720#endif 4721} 4722 4723 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4724 4725 // Check minimum allowable stack size for thread creation and to initialize 4726 // the java system classes, including StackOverflowError - depends on page 4727 // size. Add a page for compiler2 recursion in main thread. 4728 // Add in BytesPerWord times page size to account for VM stack during 4729 // class initialization depending on 32 or 64 bit VM. 4730 guarantee((Solaris::min_stack_allowed >= 4731 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4732 COMPILER2_PRESENT(+1)) * page_size), 4733 "need to increase Solaris::min_stack_allowed on this platform"); 4734 4735 size_t threadStackSizeInBytes = ThreadStackSize * K; 4736 if (threadStackSizeInBytes != 0 && 4737 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4738 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4739 Solaris::min_stack_allowed/K); 4740 return JNI_ERR; 4741 } 4742 4743 // For 64kbps there will be a 64kb page size, which makes 4744 // the usable default stack size quite a bit less. Increase the 4745 // stack for 64kb (or any > than 8kb) pages, this increases 4746 // virtual memory fragmentation (since we're not creating the 4747 // stack on a power of 2 boundary. The real fix for this 4748 // should be to fix the guard page mechanism. 4749 4750 if (vm_page_size() > 8*K) { 4751 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4752 ? threadStackSizeInBytes + 4753 ((StackYellowPages + StackRedPages) * vm_page_size()) 4754 : 0; 4755 ThreadStackSize = threadStackSizeInBytes/K; 4756 } 4757 4758 // Make the stack size a multiple of the page size so that 4759 // the yellow/red zones can be guarded. 4760 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4761 vm_page_size())); 4762 4763 Solaris::libthread_init(); 4764 if (UseNUMA) { 4765 Solaris::liblgrp_init(); 4766 } 4767 Solaris::misc_sym_init(); 4768 Solaris::signal_sets_init(); 4769 Solaris::init_signal_mem(); 4770 Solaris::install_signal_handlers(); 4771 4772 if (libjsigversion < JSIG_VERSION_1_4_1) { 4773 Maxlibjsigsigs = OLDMAXSIGNUM; 4774 } 4775 4776 // initialize synchronization primitives to use either thread or 4777 // lwp synchronization (controlled by UseLWPSynchronization) 4778 Solaris::synchronization_init(); 4779 4780 if (MaxFDLimit) { 4781 // set the number of file descriptors to max. print out error 4782 // if getrlimit/setrlimit fails but continue regardless. 4783 struct rlimit nbr_files; 4784 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4785 if (status != 0) { 4786 if (PrintMiscellaneous && (Verbose || WizardMode)) 4787 perror("os::init_2 getrlimit failed"); 4788 } else { 4789 nbr_files.rlim_cur = nbr_files.rlim_max; 4790 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4791 if (status != 0) { 4792 if (PrintMiscellaneous && (Verbose || WizardMode)) 4793 perror("os::init_2 setrlimit failed"); 4794 } 4795 } 4796 } 4797 4798 // Initialize HPI. 4799 jint hpi_result = hpi::initialize(); 4800 if (hpi_result != JNI_OK) { 4801 tty->print_cr("There was an error trying to initialize the HPI library."); 4802 return hpi_result; 4803 } 4804 4805 // Calculate theoretical max. size of Threads to guard gainst 4806 // artifical out-of-memory situations, where all available address- 4807 // space has been reserved by thread stacks. Default stack size is 1Mb. 4808 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4809 JavaThread::stack_size_at_create() : (1*K*K); 4810 assert(pre_thread_stack_size != 0, "Must have a stack"); 4811 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4812 // we should start doing Virtual Memory banging. Currently when the threads will 4813 // have used all but 200Mb of space. 4814 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4815 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4816 4817 // at-exit methods are called in the reverse order of their registration. 4818 // In Solaris 7 and earlier, atexit functions are called on return from 4819 // main or as a result of a call to exit(3C). There can be only 32 of 4820 // these functions registered and atexit() does not set errno. In Solaris 4821 // 8 and later, there is no limit to the number of functions registered 4822 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4823 // functions are called upon dlclose(3DL) in addition to return from main 4824 // and exit(3C). 4825 4826 if (PerfAllowAtExitRegistration) { 4827 // only register atexit functions if PerfAllowAtExitRegistration is set. 4828 // atexit functions can be delayed until process exit time, which 4829 // can be problematic for embedded VM situations. Embedded VMs should 4830 // call DestroyJavaVM() to assure that VM resources are released. 4831 4832 // note: perfMemory_exit_helper atexit function may be removed in 4833 // the future if the appropriate cleanup code can be added to the 4834 // VM_Exit VMOperation's doit method. 4835 if (atexit(perfMemory_exit_helper) != 0) { 4836 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4837 } 4838 } 4839 4840 // Init pset_loadavg function pointer 4841 init_pset_getloadavg_ptr(); 4842 4843 return JNI_OK; 4844} 4845 4846 4847// Mark the polling page as unreadable 4848void os::make_polling_page_unreadable(void) { 4849 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4850 fatal("Could not disable polling page"); 4851}; 4852 4853// Mark the polling page as readable 4854void os::make_polling_page_readable(void) { 4855 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4856 fatal("Could not enable polling page"); 4857}; 4858 4859// OS interface. 4860 4861int os::stat(const char *path, struct stat *sbuf) { 4862 char pathbuf[MAX_PATH]; 4863 if (strlen(path) > MAX_PATH - 1) { 4864 errno = ENAMETOOLONG; 4865 return -1; 4866 } 4867 hpi::native_path(strcpy(pathbuf, path)); 4868 return ::stat(pathbuf, sbuf); 4869} 4870 4871 4872bool os::check_heap(bool force) { return true; } 4873 4874typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4875static vsnprintf_t sol_vsnprintf = NULL; 4876 4877int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4878 if (!sol_vsnprintf) { 4879 //search for the named symbol in the objects that were loaded after libjvm 4880 void* where = RTLD_NEXT; 4881 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4882 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4883 if (!sol_vsnprintf){ 4884 //search for the named symbol in the objects that were loaded before libjvm 4885 where = RTLD_DEFAULT; 4886 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4887 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4888 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4889 } 4890 } 4891 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4892} 4893 4894 4895// Is a (classpath) directory empty? 4896bool os::dir_is_empty(const char* path) { 4897 DIR *dir = NULL; 4898 struct dirent *ptr; 4899 4900 dir = opendir(path); 4901 if (dir == NULL) return true; 4902 4903 /* Scan the directory */ 4904 bool result = true; 4905 char buf[sizeof(struct dirent) + MAX_PATH]; 4906 struct dirent *dbuf = (struct dirent *) buf; 4907 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4908 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4909 result = false; 4910 } 4911 } 4912 closedir(dir); 4913 return result; 4914} 4915 4916// create binary file, rewriting existing file if required 4917int os::create_binary_file(const char* path, bool rewrite_existing) { 4918 int oflags = O_WRONLY | O_CREAT; 4919 if (!rewrite_existing) { 4920 oflags |= O_EXCL; 4921 } 4922 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4923} 4924 4925// return current position of file pointer 4926jlong os::current_file_offset(int fd) { 4927 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4928} 4929 4930// move file pointer to the specified offset 4931jlong os::seek_to_file_offset(int fd, jlong offset) { 4932 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4933} 4934 4935// Map a block of memory. 4936char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4937 char *addr, size_t bytes, bool read_only, 4938 bool allow_exec) { 4939 int prot; 4940 int flags; 4941 4942 if (read_only) { 4943 prot = PROT_READ; 4944 flags = MAP_SHARED; 4945 } else { 4946 prot = PROT_READ | PROT_WRITE; 4947 flags = MAP_PRIVATE; 4948 } 4949 4950 if (allow_exec) { 4951 prot |= PROT_EXEC; 4952 } 4953 4954 if (addr != NULL) { 4955 flags |= MAP_FIXED; 4956 } 4957 4958 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4959 fd, file_offset); 4960 if (mapped_address == MAP_FAILED) { 4961 return NULL; 4962 } 4963 return mapped_address; 4964} 4965 4966 4967// Remap a block of memory. 4968char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4969 char *addr, size_t bytes, bool read_only, 4970 bool allow_exec) { 4971 // same as map_memory() on this OS 4972 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4973 allow_exec); 4974} 4975 4976 4977// Unmap a block of memory. 4978bool os::unmap_memory(char* addr, size_t bytes) { 4979 return munmap(addr, bytes) == 0; 4980} 4981 4982void os::pause() { 4983 char filename[MAX_PATH]; 4984 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4985 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4986 } else { 4987 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4988 } 4989 4990 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4991 if (fd != -1) { 4992 struct stat buf; 4993 close(fd); 4994 while (::stat(filename, &buf) == 0) { 4995 (void)::poll(NULL, 0, 100); 4996 } 4997 } else { 4998 jio_fprintf(stderr, 4999 "Could not open pause file '%s', continuing immediately.\n", filename); 5000 } 5001} 5002 5003#ifndef PRODUCT 5004#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5005// Turn this on if you need to trace synch operations. 5006// Set RECORD_SYNCH_LIMIT to a large-enough value, 5007// and call record_synch_enable and record_synch_disable 5008// around the computation of interest. 5009 5010void record_synch(char* name, bool returning); // defined below 5011 5012class RecordSynch { 5013 char* _name; 5014 public: 5015 RecordSynch(char* name) :_name(name) 5016 { record_synch(_name, false); } 5017 ~RecordSynch() { record_synch(_name, true); } 5018}; 5019 5020#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5021extern "C" ret name params { \ 5022 typedef ret name##_t params; \ 5023 static name##_t* implem = NULL; \ 5024 static int callcount = 0; \ 5025 if (implem == NULL) { \ 5026 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5027 if (implem == NULL) fatal(dlerror()); \ 5028 } \ 5029 ++callcount; \ 5030 RecordSynch _rs(#name); \ 5031 inner; \ 5032 return implem args; \ 5033} 5034// in dbx, examine callcounts this way: 5035// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5036 5037#define CHECK_POINTER_OK(p) \ 5038 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5039#define CHECK_MU \ 5040 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5041#define CHECK_CV \ 5042 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5043#define CHECK_P(p) \ 5044 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5045 5046#define CHECK_MUTEX(mutex_op) \ 5047CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5048 5049CHECK_MUTEX( mutex_lock) 5050CHECK_MUTEX( _mutex_lock) 5051CHECK_MUTEX( mutex_unlock) 5052CHECK_MUTEX(_mutex_unlock) 5053CHECK_MUTEX( mutex_trylock) 5054CHECK_MUTEX(_mutex_trylock) 5055 5056#define CHECK_COND(cond_op) \ 5057CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5058 5059CHECK_COND( cond_wait); 5060CHECK_COND(_cond_wait); 5061CHECK_COND(_cond_wait_cancel); 5062 5063#define CHECK_COND2(cond_op) \ 5064CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5065 5066CHECK_COND2( cond_timedwait); 5067CHECK_COND2(_cond_timedwait); 5068CHECK_COND2(_cond_timedwait_cancel); 5069 5070// do the _lwp_* versions too 5071#define mutex_t lwp_mutex_t 5072#define cond_t lwp_cond_t 5073CHECK_MUTEX( _lwp_mutex_lock) 5074CHECK_MUTEX( _lwp_mutex_unlock) 5075CHECK_MUTEX( _lwp_mutex_trylock) 5076CHECK_MUTEX( __lwp_mutex_lock) 5077CHECK_MUTEX( __lwp_mutex_unlock) 5078CHECK_MUTEX( __lwp_mutex_trylock) 5079CHECK_MUTEX(___lwp_mutex_lock) 5080CHECK_MUTEX(___lwp_mutex_unlock) 5081 5082CHECK_COND( _lwp_cond_wait); 5083CHECK_COND( __lwp_cond_wait); 5084CHECK_COND(___lwp_cond_wait); 5085 5086CHECK_COND2( _lwp_cond_timedwait); 5087CHECK_COND2( __lwp_cond_timedwait); 5088#undef mutex_t 5089#undef cond_t 5090 5091CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5092CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5093CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5094CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5095CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5096CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5097CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5098CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5099 5100 5101// recording machinery: 5102 5103enum { RECORD_SYNCH_LIMIT = 200 }; 5104char* record_synch_name[RECORD_SYNCH_LIMIT]; 5105void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5106bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5107thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5108int record_synch_count = 0; 5109bool record_synch_enabled = false; 5110 5111// in dbx, examine recorded data this way: 5112// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5113 5114void record_synch(char* name, bool returning) { 5115 if (record_synch_enabled) { 5116 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5117 record_synch_name[record_synch_count] = name; 5118 record_synch_returning[record_synch_count] = returning; 5119 record_synch_thread[record_synch_count] = thr_self(); 5120 record_synch_arg0ptr[record_synch_count] = &name; 5121 record_synch_count++; 5122 } 5123 // put more checking code here: 5124 // ... 5125 } 5126} 5127 5128void record_synch_enable() { 5129 // start collecting trace data, if not already doing so 5130 if (!record_synch_enabled) record_synch_count = 0; 5131 record_synch_enabled = true; 5132} 5133 5134void record_synch_disable() { 5135 // stop collecting trace data 5136 record_synch_enabled = false; 5137} 5138 5139#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5140#endif // PRODUCT 5141 5142const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5143const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5144 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5145 5146 5147// JVMTI & JVM monitoring and management support 5148// The thread_cpu_time() and current_thread_cpu_time() are only 5149// supported if is_thread_cpu_time_supported() returns true. 5150// They are not supported on Solaris T1. 5151 5152// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5153// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5154// of a thread. 5155// 5156// current_thread_cpu_time() and thread_cpu_time(Thread *) 5157// returns the fast estimate available on the platform. 5158 5159// hrtime_t gethrvtime() return value includes 5160// user time but does not include system time 5161jlong os::current_thread_cpu_time() { 5162 return (jlong) gethrvtime(); 5163} 5164 5165jlong os::thread_cpu_time(Thread *thread) { 5166 // return user level CPU time only to be consistent with 5167 // what current_thread_cpu_time returns. 5168 // thread_cpu_time_info() must be changed if this changes 5169 return os::thread_cpu_time(thread, false /* user time only */); 5170} 5171 5172jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5173 if (user_sys_cpu_time) { 5174 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5175 } else { 5176 return os::current_thread_cpu_time(); 5177 } 5178} 5179 5180jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5181 char proc_name[64]; 5182 int count; 5183 prusage_t prusage; 5184 jlong lwp_time; 5185 int fd; 5186 5187 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5188 getpid(), 5189 thread->osthread()->lwp_id()); 5190 fd = open(proc_name, O_RDONLY); 5191 if ( fd == -1 ) return -1; 5192 5193 do { 5194 count = pread(fd, 5195 (void *)&prusage.pr_utime, 5196 thr_time_size, 5197 thr_time_off); 5198 } while (count < 0 && errno == EINTR); 5199 close(fd); 5200 if ( count < 0 ) return -1; 5201 5202 if (user_sys_cpu_time) { 5203 // user + system CPU time 5204 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5205 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5206 (jlong)prusage.pr_stime.tv_nsec + 5207 (jlong)prusage.pr_utime.tv_nsec; 5208 } else { 5209 // user level CPU time only 5210 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5211 (jlong)prusage.pr_utime.tv_nsec; 5212 } 5213 5214 return(lwp_time); 5215} 5216 5217void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5218 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5219 info_ptr->may_skip_backward = false; // elapsed time not wall time 5220 info_ptr->may_skip_forward = false; // elapsed time not wall time 5221 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5222} 5223 5224void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5225 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5226 info_ptr->may_skip_backward = false; // elapsed time not wall time 5227 info_ptr->may_skip_forward = false; // elapsed time not wall time 5228 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5229} 5230 5231bool os::is_thread_cpu_time_supported() { 5232 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5233 return true; 5234 } else { 5235 return false; 5236 } 5237} 5238 5239// System loadavg support. Returns -1 if load average cannot be obtained. 5240// Return the load average for our processor set if the primitive exists 5241// (Solaris 9 and later). Otherwise just return system wide loadavg. 5242int os::loadavg(double loadavg[], int nelem) { 5243 if (pset_getloadavg_ptr != NULL) { 5244 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5245 } else { 5246 return ::getloadavg(loadavg, nelem); 5247 } 5248} 5249 5250//--------------------------------------------------------------------------------- 5251#ifndef PRODUCT 5252 5253static address same_page(address x, address y) { 5254 intptr_t page_bits = -os::vm_page_size(); 5255 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5256 return x; 5257 else if (x > y) 5258 return (address)(intptr_t(y) | ~page_bits) + 1; 5259 else 5260 return (address)(intptr_t(y) & page_bits); 5261} 5262 5263bool os::find(address addr) { 5264 Dl_info dlinfo; 5265 memset(&dlinfo, 0, sizeof(dlinfo)); 5266 if (dladdr(addr, &dlinfo)) { 5267#ifdef _LP64 5268 tty->print("0x%016lx: ", addr); 5269#else 5270 tty->print("0x%08x: ", addr); 5271#endif 5272 if (dlinfo.dli_sname != NULL) 5273 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5274 else if (dlinfo.dli_fname) 5275 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5276 else 5277 tty->print("<absolute address>"); 5278 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5279#ifdef _LP64 5280 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5281#else 5282 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5283#endif 5284 tty->cr(); 5285 5286 if (Verbose) { 5287 // decode some bytes around the PC 5288 address begin = same_page(addr-40, addr); 5289 address end = same_page(addr+40, addr); 5290 address lowest = (address) dlinfo.dli_sname; 5291 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5292 if (begin < lowest) begin = lowest; 5293 Dl_info dlinfo2; 5294 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5295 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5296 end = (address) dlinfo2.dli_saddr; 5297 Disassembler::decode(begin, end); 5298 } 5299 return true; 5300 } 5301 return false; 5302} 5303 5304#endif 5305 5306 5307// Following function has been added to support HotSparc's libjvm.so running 5308// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5309// src/solaris/hpi/native_threads in the EVM codebase. 5310// 5311// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5312// libraries and should thus be removed. We will leave it behind for a while 5313// until we no longer want to able to run on top of 1.3.0 Solaris production 5314// JDK. See 4341971. 5315 5316#define STACK_SLACK 0x800 5317 5318extern "C" { 5319 intptr_t sysThreadAvailableStackWithSlack() { 5320 stack_t st; 5321 intptr_t retval, stack_top; 5322 retval = thr_stksegment(&st); 5323 assert(retval == 0, "incorrect return value from thr_stksegment"); 5324 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5325 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5326 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5327 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5328 } 5329} 5330 5331// Just to get the Kernel build to link on solaris for testing. 5332 5333extern "C" { 5334class ASGCT_CallTrace; 5335void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5336 KERNEL_RETURN; 5337} 5338 5339 5340// ObjectMonitor park-unpark infrastructure ... 5341// 5342// We implement Solaris and Linux PlatformEvents with the 5343// obvious condvar-mutex-flag triple. 5344// Another alternative that works quite well is pipes: 5345// Each PlatformEvent consists of a pipe-pair. 5346// The thread associated with the PlatformEvent 5347// calls park(), which reads from the input end of the pipe. 5348// Unpark() writes into the other end of the pipe. 5349// The write-side of the pipe must be set NDELAY. 5350// Unfortunately pipes consume a large # of handles. 5351// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5352// Using pipes for the 1st few threads might be workable, however. 5353// 5354// park() is permitted to return spuriously. 5355// Callers of park() should wrap the call to park() in 5356// an appropriate loop. A litmus test for the correct 5357// usage of park is the following: if park() were modified 5358// to immediately return 0 your code should still work, 5359// albeit degenerating to a spin loop. 5360// 5361// An interesting optimization for park() is to use a trylock() 5362// to attempt to acquire the mutex. If the trylock() fails 5363// then we know that a concurrent unpark() operation is in-progress. 5364// in that case the park() code could simply set _count to 0 5365// and return immediately. The subsequent park() operation *might* 5366// return immediately. That's harmless as the caller of park() is 5367// expected to loop. By using trylock() we will have avoided a 5368// avoided a context switch caused by contention on the per-thread mutex. 5369// 5370// TODO-FIXME: 5371// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5372// objectmonitor implementation. 5373// 2. Collapse the JSR166 parker event, and the 5374// objectmonitor ParkEvent into a single "Event" construct. 5375// 3. In park() and unpark() add: 5376// assert (Thread::current() == AssociatedWith). 5377// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5378// 1-out-of-N park() operations will return immediately. 5379// 5380// _Event transitions in park() 5381// -1 => -1 : illegal 5382// 1 => 0 : pass - return immediately 5383// 0 => -1 : block 5384// 5385// _Event serves as a restricted-range semaphore. 5386// 5387// Another possible encoding of _Event would be with 5388// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5389// 5390// TODO-FIXME: add DTRACE probes for: 5391// 1. Tx parks 5392// 2. Ty unparks Tx 5393// 3. Tx resumes from park 5394 5395 5396// value determined through experimentation 5397#define ROUNDINGFIX 11 5398 5399// utility to compute the abstime argument to timedwait. 5400// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5401 5402static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5403 // millis is the relative timeout time 5404 // abstime will be the absolute timeout time 5405 if (millis < 0) millis = 0; 5406 struct timeval now; 5407 int status = gettimeofday(&now, NULL); 5408 assert(status == 0, "gettimeofday"); 5409 jlong seconds = millis / 1000; 5410 jlong max_wait_period; 5411 5412 if (UseLWPSynchronization) { 5413 // forward port of fix for 4275818 (not sleeping long enough) 5414 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5415 // _lwp_cond_timedwait() used a round_down algorithm rather 5416 // than a round_up. For millis less than our roundfactor 5417 // it rounded down to 0 which doesn't meet the spec. 5418 // For millis > roundfactor we may return a bit sooner, but 5419 // since we can not accurately identify the patch level and 5420 // this has already been fixed in Solaris 9 and 8 we will 5421 // leave it alone rather than always rounding down. 5422 5423 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5424 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5425 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5426 max_wait_period = 21000000; 5427 } else { 5428 max_wait_period = 50000000; 5429 } 5430 millis %= 1000; 5431 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5432 seconds = max_wait_period; 5433 } 5434 abstime->tv_sec = now.tv_sec + seconds; 5435 long usec = now.tv_usec + millis * 1000; 5436 if (usec >= 1000000) { 5437 abstime->tv_sec += 1; 5438 usec -= 1000000; 5439 } 5440 abstime->tv_nsec = usec * 1000; 5441 return abstime; 5442} 5443 5444// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5445// Conceptually TryPark() should be equivalent to park(0). 5446 5447int os::PlatformEvent::TryPark() { 5448 for (;;) { 5449 const int v = _Event ; 5450 guarantee ((v == 0) || (v == 1), "invariant") ; 5451 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5452 } 5453} 5454 5455void os::PlatformEvent::park() { // AKA: down() 5456 // Invariant: Only the thread associated with the Event/PlatformEvent 5457 // may call park(). 5458 int v ; 5459 for (;;) { 5460 v = _Event ; 5461 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5462 } 5463 guarantee (v >= 0, "invariant") ; 5464 if (v == 0) { 5465 // Do this the hard way by blocking ... 5466 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5467 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5468 // Only for SPARC >= V8PlusA 5469#if defined(__sparc) && defined(COMPILER2) 5470 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5471#endif 5472 int status = os::Solaris::mutex_lock(_mutex); 5473 assert_status(status == 0, status, "mutex_lock"); 5474 guarantee (_nParked == 0, "invariant") ; 5475 ++ _nParked ; 5476 while (_Event < 0) { 5477 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5478 // Treat this the same as if the wait was interrupted 5479 // With usr/lib/lwp going to kernel, always handle ETIME 5480 status = os::Solaris::cond_wait(_cond, _mutex); 5481 if (status == ETIME) status = EINTR ; 5482 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5483 } 5484 -- _nParked ; 5485 _Event = 0 ; 5486 status = os::Solaris::mutex_unlock(_mutex); 5487 assert_status(status == 0, status, "mutex_unlock"); 5488 } 5489} 5490 5491int os::PlatformEvent::park(jlong millis) { 5492 guarantee (_nParked == 0, "invariant") ; 5493 int v ; 5494 for (;;) { 5495 v = _Event ; 5496 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5497 } 5498 guarantee (v >= 0, "invariant") ; 5499 if (v != 0) return OS_OK ; 5500 5501 int ret = OS_TIMEOUT; 5502 timestruc_t abst; 5503 compute_abstime (&abst, millis); 5504 5505 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5506 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5507 // Only for SPARC >= V8PlusA 5508#if defined(__sparc) && defined(COMPILER2) 5509 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5510#endif 5511 int status = os::Solaris::mutex_lock(_mutex); 5512 assert_status(status == 0, status, "mutex_lock"); 5513 guarantee (_nParked == 0, "invariant") ; 5514 ++ _nParked ; 5515 while (_Event < 0) { 5516 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5517 assert_status(status == 0 || status == EINTR || 5518 status == ETIME || status == ETIMEDOUT, 5519 status, "cond_timedwait"); 5520 if (!FilterSpuriousWakeups) break ; // previous semantics 5521 if (status == ETIME || status == ETIMEDOUT) break ; 5522 // We consume and ignore EINTR and spurious wakeups. 5523 } 5524 -- _nParked ; 5525 if (_Event >= 0) ret = OS_OK ; 5526 _Event = 0 ; 5527 status = os::Solaris::mutex_unlock(_mutex); 5528 assert_status(status == 0, status, "mutex_unlock"); 5529 return ret; 5530} 5531 5532void os::PlatformEvent::unpark() { 5533 int v, AnyWaiters; 5534 5535 // Increment _Event. 5536 // Another acceptable implementation would be to simply swap 1 5537 // into _Event: 5538 // if (Swap (&_Event, 1) < 0) { 5539 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5540 // if (AnyWaiters) cond_signal (_cond) ; 5541 // } 5542 5543 for (;;) { 5544 v = _Event ; 5545 if (v > 0) { 5546 // The LD of _Event could have reordered or be satisfied 5547 // by a read-aside from this processor's write buffer. 5548 // To avoid problems execute a barrier and then 5549 // ratify the value. A degenerate CAS() would also work. 5550 // Viz., CAS (v+0, &_Event, v) == v). 5551 OrderAccess::fence() ; 5552 if (_Event == v) return ; 5553 continue ; 5554 } 5555 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5556 } 5557 5558 // If the thread associated with the event was parked, wake it. 5559 if (v < 0) { 5560 int status ; 5561 // Wait for the thread assoc with the PlatformEvent to vacate. 5562 status = os::Solaris::mutex_lock(_mutex); 5563 assert_status(status == 0, status, "mutex_lock"); 5564 AnyWaiters = _nParked ; 5565 status = os::Solaris::mutex_unlock(_mutex); 5566 assert_status(status == 0, status, "mutex_unlock"); 5567 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5568 if (AnyWaiters != 0) { 5569 // We intentional signal *after* dropping the lock 5570 // to avoid a common class of futile wakeups. 5571 status = os::Solaris::cond_signal(_cond); 5572 assert_status(status == 0, status, "cond_signal"); 5573 } 5574 } 5575} 5576 5577// JSR166 5578// ------------------------------------------------------- 5579 5580/* 5581 * The solaris and linux implementations of park/unpark are fairly 5582 * conservative for now, but can be improved. They currently use a 5583 * mutex/condvar pair, plus _counter. 5584 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5585 * sets count to 1 and signals condvar. Only one thread ever waits 5586 * on the condvar. Contention seen when trying to park implies that someone 5587 * is unparking you, so don't wait. And spurious returns are fine, so there 5588 * is no need to track notifications. 5589 */ 5590 5591#define NANOSECS_PER_SEC 1000000000 5592#define NANOSECS_PER_MILLISEC 1000000 5593#define MAX_SECS 100000000 5594 5595/* 5596 * This code is common to linux and solaris and will be moved to a 5597 * common place in dolphin. 5598 * 5599 * The passed in time value is either a relative time in nanoseconds 5600 * or an absolute time in milliseconds. Either way it has to be unpacked 5601 * into suitable seconds and nanoseconds components and stored in the 5602 * given timespec structure. 5603 * Given time is a 64-bit value and the time_t used in the timespec is only 5604 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5605 * overflow if times way in the future are given. Further on Solaris versions 5606 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5607 * number of seconds, in abstime, is less than current_time + 100,000,000. 5608 * As it will be 28 years before "now + 100000000" will overflow we can 5609 * ignore overflow and just impose a hard-limit on seconds using the value 5610 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5611 * years from "now". 5612 */ 5613static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5614 assert (time > 0, "convertTime"); 5615 5616 struct timeval now; 5617 int status = gettimeofday(&now, NULL); 5618 assert(status == 0, "gettimeofday"); 5619 5620 time_t max_secs = now.tv_sec + MAX_SECS; 5621 5622 if (isAbsolute) { 5623 jlong secs = time / 1000; 5624 if (secs > max_secs) { 5625 absTime->tv_sec = max_secs; 5626 } 5627 else { 5628 absTime->tv_sec = secs; 5629 } 5630 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5631 } 5632 else { 5633 jlong secs = time / NANOSECS_PER_SEC; 5634 if (secs >= MAX_SECS) { 5635 absTime->tv_sec = max_secs; 5636 absTime->tv_nsec = 0; 5637 } 5638 else { 5639 absTime->tv_sec = now.tv_sec + secs; 5640 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5641 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5642 absTime->tv_nsec -= NANOSECS_PER_SEC; 5643 ++absTime->tv_sec; // note: this must be <= max_secs 5644 } 5645 } 5646 } 5647 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5648 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5649 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5650 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5651} 5652 5653void Parker::park(bool isAbsolute, jlong time) { 5654 5655 // Optional fast-path check: 5656 // Return immediately if a permit is available. 5657 if (_counter > 0) { 5658 _counter = 0 ; 5659 return ; 5660 } 5661 5662 // Optional fast-exit: Check interrupt before trying to wait 5663 Thread* thread = Thread::current(); 5664 assert(thread->is_Java_thread(), "Must be JavaThread"); 5665 JavaThread *jt = (JavaThread *)thread; 5666 if (Thread::is_interrupted(thread, false)) { 5667 return; 5668 } 5669 5670 // First, demultiplex/decode time arguments 5671 timespec absTime; 5672 if (time < 0) { // don't wait at all 5673 return; 5674 } 5675 if (time > 0) { 5676 // Warning: this code might be exposed to the old Solaris time 5677 // round-down bugs. Grep "roundingFix" for details. 5678 unpackTime(&absTime, isAbsolute, time); 5679 } 5680 5681 // Enter safepoint region 5682 // Beware of deadlocks such as 6317397. 5683 // The per-thread Parker:: _mutex is a classic leaf-lock. 5684 // In particular a thread must never block on the Threads_lock while 5685 // holding the Parker:: mutex. If safepoints are pending both the 5686 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5687 ThreadBlockInVM tbivm(jt); 5688 5689 // Don't wait if cannot get lock since interference arises from 5690 // unblocking. Also. check interrupt before trying wait 5691 if (Thread::is_interrupted(thread, false) || 5692 os::Solaris::mutex_trylock(_mutex) != 0) { 5693 return; 5694 } 5695 5696 int status ; 5697 5698 if (_counter > 0) { // no wait needed 5699 _counter = 0; 5700 status = os::Solaris::mutex_unlock(_mutex); 5701 assert (status == 0, "invariant") ; 5702 return; 5703 } 5704 5705#ifdef ASSERT 5706 // Don't catch signals while blocked; let the running threads have the signals. 5707 // (This allows a debugger to break into the running thread.) 5708 sigset_t oldsigs; 5709 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5710 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5711#endif 5712 5713 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5714 jt->set_suspend_equivalent(); 5715 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5716 5717 // Do this the hard way by blocking ... 5718 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5719 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5720 // Only for SPARC >= V8PlusA 5721#if defined(__sparc) && defined(COMPILER2) 5722 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5723#endif 5724 5725 if (time == 0) { 5726 status = os::Solaris::cond_wait (_cond, _mutex) ; 5727 } else { 5728 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5729 } 5730 // Note that an untimed cond_wait() can sometimes return ETIME on older 5731 // versions of the Solaris. 5732 assert_status(status == 0 || status == EINTR || 5733 status == ETIME || status == ETIMEDOUT, 5734 status, "cond_timedwait"); 5735 5736#ifdef ASSERT 5737 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5738#endif 5739 _counter = 0 ; 5740 status = os::Solaris::mutex_unlock(_mutex); 5741 assert_status(status == 0, status, "mutex_unlock") ; 5742 5743 // If externally suspended while waiting, re-suspend 5744 if (jt->handle_special_suspend_equivalent_condition()) { 5745 jt->java_suspend_self(); 5746 } 5747 5748} 5749 5750void Parker::unpark() { 5751 int s, status ; 5752 status = os::Solaris::mutex_lock (_mutex) ; 5753 assert (status == 0, "invariant") ; 5754 s = _counter; 5755 _counter = 1; 5756 status = os::Solaris::mutex_unlock (_mutex) ; 5757 assert (status == 0, "invariant") ; 5758 5759 if (s < 1) { 5760 status = os::Solaris::cond_signal (_cond) ; 5761 assert (status == 0, "invariant") ; 5762 } 5763} 5764 5765extern char** environ; 5766 5767// Run the specified command in a separate process. Return its exit value, 5768// or -1 on failure (e.g. can't fork a new process). 5769// Unlike system(), this function can be called from signal handler. It 5770// doesn't block SIGINT et al. 5771int os::fork_and_exec(char* cmd) { 5772 char * argv[4]; 5773 argv[0] = (char *)"sh"; 5774 argv[1] = (char *)"-c"; 5775 argv[2] = cmd; 5776 argv[3] = NULL; 5777 5778 // fork is async-safe, fork1 is not so can't use in signal handler 5779 pid_t pid; 5780 Thread* t = ThreadLocalStorage::get_thread_slow(); 5781 if (t != NULL && t->is_inside_signal_handler()) { 5782 pid = fork(); 5783 } else { 5784 pid = fork1(); 5785 } 5786 5787 if (pid < 0) { 5788 // fork failed 5789 warning("fork failed: %s", strerror(errno)); 5790 return -1; 5791 5792 } else if (pid == 0) { 5793 // child process 5794 5795 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5796 execve("/usr/bin/sh", argv, environ); 5797 5798 // execve failed 5799 _exit(-1); 5800 5801 } else { 5802 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5803 // care about the actual exit code, for now. 5804 5805 int status; 5806 5807 // Wait for the child process to exit. This returns immediately if 5808 // the child has already exited. */ 5809 while (waitpid(pid, &status, 0) < 0) { 5810 switch (errno) { 5811 case ECHILD: return 0; 5812 case EINTR: break; 5813 default: return -1; 5814 } 5815 } 5816 5817 if (WIFEXITED(status)) { 5818 // The child exited normally; get its exit code. 5819 return WEXITSTATUS(status); 5820 } else if (WIFSIGNALED(status)) { 5821 // The child exited because of a signal 5822 // The best value to return is 0x80 + signal number, 5823 // because that is what all Unix shells do, and because 5824 // it allows callers to distinguish between process exit and 5825 // process death by signal. 5826 return 0x80 + WTERMSIG(status); 5827 } else { 5828 // Unknown exit code; pass it through 5829 return status; 5830 } 5831 } 5832} 5833