os_solaris.cpp revision 342:37f87013dfd8
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 1694bool os::supports_vtime() { return true; } 1695 1696bool os::enable_vtime() { 1697 int fd = open("/proc/self/ctl", O_WRONLY); 1698 if (fd == -1) 1699 return false; 1700 1701 long cmd[] = { PCSET, PR_MSACCT }; 1702 int res = write(fd, cmd, sizeof(long) * 2); 1703 close(fd); 1704 if (res != sizeof(long) * 2) 1705 return false; 1706 1707 return true; 1708} 1709 1710bool os::vtime_enabled() { 1711 int fd = open("/proc/self/status", O_RDONLY); 1712 if (fd == -1) 1713 return false; 1714 1715 pstatus_t status; 1716 int res = read(fd, (void*) &status, sizeof(pstatus_t)); 1717 close(fd); 1718 if (res != sizeof(pstatus_t)) 1719 return false; 1720 1721 return status.pr_flags & PR_MSACCT; 1722} 1723 1724double os::elapsedVTime() { 1725 return (double)gethrvtime() / (double)hrtime_hz; 1726} 1727 1728// Used internally for comparisons only 1729// getTimeMillis guaranteed to not move backwards on Solaris 1730jlong getTimeMillis() { 1731 jlong nanotime = getTimeNanos(); 1732 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1733} 1734 1735// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1736jlong os::javaTimeMillis() { 1737 timeval t; 1738 if (gettimeofday( &t, NULL) == -1) 1739 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1740 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1741} 1742 1743jlong os::javaTimeNanos() { 1744 return (jlong)getTimeNanos(); 1745} 1746 1747void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1748 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1749 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1750 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1751 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1752} 1753 1754char * os::local_time_string(char *buf, size_t buflen) { 1755 struct tm t; 1756 time_t long_time; 1757 time(&long_time); 1758 localtime_r(&long_time, &t); 1759 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1760 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1761 t.tm_hour, t.tm_min, t.tm_sec); 1762 return buf; 1763} 1764 1765// Note: os::shutdown() might be called very early during initialization, or 1766// called from signal handler. Before adding something to os::shutdown(), make 1767// sure it is async-safe and can handle partially initialized VM. 1768void os::shutdown() { 1769 1770 // allow PerfMemory to attempt cleanup of any persistent resources 1771 perfMemory_exit(); 1772 1773 // needs to remove object in file system 1774 AttachListener::abort(); 1775 1776 // flush buffered output, finish log files 1777 ostream_abort(); 1778 1779 // Check for abort hook 1780 abort_hook_t abort_hook = Arguments::abort_hook(); 1781 if (abort_hook != NULL) { 1782 abort_hook(); 1783 } 1784} 1785 1786// Note: os::abort() might be called very early during initialization, or 1787// called from signal handler. Before adding something to os::abort(), make 1788// sure it is async-safe and can handle partially initialized VM. 1789void os::abort(bool dump_core) { 1790 os::shutdown(); 1791 if (dump_core) { 1792#ifndef PRODUCT 1793 fdStream out(defaultStream::output_fd()); 1794 out.print_raw("Current thread is "); 1795 char buf[16]; 1796 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1797 out.print_raw_cr(buf); 1798 out.print_raw_cr("Dumping core ..."); 1799#endif 1800 ::abort(); // dump core (for debugging) 1801 } 1802 1803 ::exit(1); 1804} 1805 1806// Die immediately, no exit hook, no abort hook, no cleanup. 1807void os::die() { 1808 _exit(-1); 1809} 1810 1811// unused 1812void os::set_error_file(const char *logfile) {} 1813 1814// DLL functions 1815 1816const char* os::dll_file_extension() { return ".so"; } 1817 1818const char* os::get_temp_directory() { return "/tmp/"; } 1819 1820const char* os::get_current_directory(char *buf, int buflen) { 1821 return getcwd(buf, buflen); 1822} 1823 1824// check if addr is inside libjvm[_g].so 1825bool os::address_is_in_vm(address addr) { 1826 static address libjvm_base_addr; 1827 Dl_info dlinfo; 1828 1829 if (libjvm_base_addr == NULL) { 1830 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1831 libjvm_base_addr = (address)dlinfo.dli_fbase; 1832 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1833 } 1834 1835 if (dladdr((void *)addr, &dlinfo)) { 1836 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1837 } 1838 1839 return false; 1840} 1841 1842typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1843static dladdr1_func_type dladdr1_func = NULL; 1844 1845bool os::dll_address_to_function_name(address addr, char *buf, 1846 int buflen, int * offset) { 1847 Dl_info dlinfo; 1848 1849 // dladdr1_func was initialized in os::init() 1850 if (dladdr1_func){ 1851 // yes, we have dladdr1 1852 1853 // Support for dladdr1 is checked at runtime; it may be 1854 // available even if the vm is built on a machine that does 1855 // not have dladdr1 support. Make sure there is a value for 1856 // RTLD_DL_SYMENT. 1857 #ifndef RTLD_DL_SYMENT 1858 #define RTLD_DL_SYMENT 1 1859 #endif 1860 Sym * info; 1861 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1862 RTLD_DL_SYMENT)) { 1863 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1864 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1865 1866 // check if the returned symbol really covers addr 1867 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1868 } else { 1869 if (buf) buf[0] = '\0'; 1870 if (offset) *offset = -1; 1871 return false; 1872 } 1873 } else { 1874 // no, only dladdr is available 1875 if(dladdr((void *)addr, &dlinfo)) { 1876 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1877 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1878 return true; 1879 } else { 1880 if (buf) buf[0] = '\0'; 1881 if (offset) *offset = -1; 1882 return false; 1883 } 1884 } 1885} 1886 1887bool os::dll_address_to_library_name(address addr, char* buf, 1888 int buflen, int* offset) { 1889 Dl_info dlinfo; 1890 1891 if (dladdr((void*)addr, &dlinfo)){ 1892 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1893 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1894 return true; 1895 } else { 1896 if (buf) buf[0] = '\0'; 1897 if (offset) *offset = -1; 1898 return false; 1899 } 1900} 1901 1902// Prints the names and full paths of all opened dynamic libraries 1903// for current process 1904void os::print_dll_info(outputStream * st) { 1905 Dl_info dli; 1906 void *handle; 1907 Link_map *map; 1908 Link_map *p; 1909 1910 st->print_cr("Dynamic libraries:"); st->flush(); 1911 1912 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1913 st->print_cr("Error: Cannot print dynamic libraries."); 1914 return; 1915 } 1916 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1917 if (handle == NULL) { 1918 st->print_cr("Error: Cannot print dynamic libraries."); 1919 return; 1920 } 1921 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1922 if (map == NULL) { 1923 st->print_cr("Error: Cannot print dynamic libraries."); 1924 return; 1925 } 1926 1927 while (map->l_prev != NULL) 1928 map = map->l_prev; 1929 1930 while (map != NULL) { 1931 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1932 map = map->l_next; 1933 } 1934 1935 dlclose(handle); 1936} 1937 1938 // Loads .dll/.so and 1939 // in case of error it checks if .dll/.so was built for the 1940 // same architecture as Hotspot is running on 1941 1942void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1943{ 1944 void * result= ::dlopen(filename, RTLD_LAZY); 1945 if (result != NULL) { 1946 // Successful loading 1947 return result; 1948 } 1949 1950 Elf32_Ehdr elf_head; 1951 1952 // Read system error message into ebuf 1953 // It may or may not be overwritten below 1954 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1955 ebuf[ebuflen-1]='\0'; 1956 int diag_msg_max_length=ebuflen-strlen(ebuf); 1957 char* diag_msg_buf=ebuf+strlen(ebuf); 1958 1959 if (diag_msg_max_length==0) { 1960 // No more space in ebuf for additional diagnostics message 1961 return NULL; 1962 } 1963 1964 1965 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1966 1967 if (file_descriptor < 0) { 1968 // Can't open library, report dlerror() message 1969 return NULL; 1970 } 1971 1972 bool failed_to_read_elf_head= 1973 (sizeof(elf_head)!= 1974 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1975 1976 ::close(file_descriptor); 1977 if (failed_to_read_elf_head) { 1978 // file i/o error - report dlerror() msg 1979 return NULL; 1980 } 1981 1982 typedef struct { 1983 Elf32_Half code; // Actual value as defined in elf.h 1984 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1985 char elf_class; // 32 or 64 bit 1986 char endianess; // MSB or LSB 1987 char* name; // String representation 1988 } arch_t; 1989 1990 static const arch_t arch_array[]={ 1991 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1992 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1993 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1994 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1995 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1996 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1997 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1998 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1999 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 2000 }; 2001 2002 #if (defined IA32) 2003 static Elf32_Half running_arch_code=EM_386; 2004 #elif (defined AMD64) 2005 static Elf32_Half running_arch_code=EM_X86_64; 2006 #elif (defined IA64) 2007 static Elf32_Half running_arch_code=EM_IA_64; 2008 #elif (defined __sparc) && (defined _LP64) 2009 static Elf32_Half running_arch_code=EM_SPARCV9; 2010 #elif (defined __sparc) && (!defined _LP64) 2011 static Elf32_Half running_arch_code=EM_SPARC; 2012 #elif (defined __powerpc64__) 2013 static Elf32_Half running_arch_code=EM_PPC64; 2014 #elif (defined __powerpc__) 2015 static Elf32_Half running_arch_code=EM_PPC; 2016 #else 2017 #error Method os::dll_load requires that one of following is defined:\ 2018 IA32, AMD64, IA64, __sparc, __powerpc__ 2019 #endif 2020 2021 // Identify compatability class for VM's architecture and library's architecture 2022 // Obtain string descriptions for architectures 2023 2024 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2025 int running_arch_index=-1; 2026 2027 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2028 if (running_arch_code == arch_array[i].code) { 2029 running_arch_index = i; 2030 } 2031 if (lib_arch.code == arch_array[i].code) { 2032 lib_arch.compat_class = arch_array[i].compat_class; 2033 lib_arch.name = arch_array[i].name; 2034 } 2035 } 2036 2037 assert(running_arch_index != -1, 2038 "Didn't find running architecture code (running_arch_code) in arch_array"); 2039 if (running_arch_index == -1) { 2040 // Even though running architecture detection failed 2041 // we may still continue with reporting dlerror() message 2042 return NULL; 2043 } 2044 2045 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2046 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2047 return NULL; 2048 } 2049 2050 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2051 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2052 return NULL; 2053 } 2054 2055 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2056 if ( lib_arch.name!=NULL ) { 2057 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2058 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2059 lib_arch.name, arch_array[running_arch_index].name); 2060 } else { 2061 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2062 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2063 lib_arch.code, 2064 arch_array[running_arch_index].name); 2065 } 2066 } 2067 2068 return NULL; 2069} 2070 2071 2072 2073bool _print_ascii_file(const char* filename, outputStream* st) { 2074 int fd = open(filename, O_RDONLY); 2075 if (fd == -1) { 2076 return false; 2077 } 2078 2079 char buf[32]; 2080 int bytes; 2081 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2082 st->print_raw(buf, bytes); 2083 } 2084 2085 close(fd); 2086 2087 return true; 2088} 2089 2090void os::print_os_info(outputStream* st) { 2091 st->print("OS:"); 2092 2093 if (!_print_ascii_file("/etc/release", st)) { 2094 st->print("Solaris"); 2095 } 2096 st->cr(); 2097 2098 // kernel 2099 st->print("uname:"); 2100 struct utsname name; 2101 uname(&name); 2102 st->print(name.sysname); st->print(" "); 2103 st->print(name.release); st->print(" "); 2104 st->print(name.version); st->print(" "); 2105 st->print(name.machine); 2106 2107 // libthread 2108 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2109 else st->print(" (T1 libthread)"); 2110 st->cr(); 2111 2112 // rlimit 2113 st->print("rlimit:"); 2114 struct rlimit rlim; 2115 2116 st->print(" STACK "); 2117 getrlimit(RLIMIT_STACK, &rlim); 2118 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2119 else st->print("%uk", rlim.rlim_cur >> 10); 2120 2121 st->print(", CORE "); 2122 getrlimit(RLIMIT_CORE, &rlim); 2123 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2124 else st->print("%uk", rlim.rlim_cur >> 10); 2125 2126 st->print(", NOFILE "); 2127 getrlimit(RLIMIT_NOFILE, &rlim); 2128 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2129 else st->print("%d", rlim.rlim_cur); 2130 2131 st->print(", AS "); 2132 getrlimit(RLIMIT_AS, &rlim); 2133 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2134 else st->print("%uk", rlim.rlim_cur >> 10); 2135 st->cr(); 2136 2137 // load average 2138 st->print("load average:"); 2139 double loadavg[3]; 2140 os::loadavg(loadavg, 3); 2141 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2142 st->cr(); 2143} 2144 2145 2146static bool check_addr0(outputStream* st) { 2147 jboolean status = false; 2148 int fd = open("/proc/self/map",O_RDONLY); 2149 if (fd >= 0) { 2150 prmap_t p; 2151 while(read(fd, &p, sizeof(p)) > 0) { 2152 if (p.pr_vaddr == 0x0) { 2153 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2154 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2155 st->print("Access:"); 2156 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2157 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2158 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2159 st->cr(); 2160 status = true; 2161 } 2162 close(fd); 2163 } 2164 } 2165 return status; 2166} 2167 2168void os::print_memory_info(outputStream* st) { 2169 st->print("Memory:"); 2170 st->print(" %dk page", os::vm_page_size()>>10); 2171 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2172 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2173 st->cr(); 2174 (void) check_addr0(st); 2175} 2176 2177// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2178// but they're the same for all the solaris architectures that we support. 2179const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2180 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2181 "ILL_COPROC", "ILL_BADSTK" }; 2182 2183const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2184 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2185 "FPE_FLTINV", "FPE_FLTSUB" }; 2186 2187const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2188 2189const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2190 2191void os::print_siginfo(outputStream* st, void* siginfo) { 2192 st->print("siginfo:"); 2193 2194 const int buflen = 100; 2195 char buf[buflen]; 2196 siginfo_t *si = (siginfo_t*)siginfo; 2197 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2198 char *err = strerror(si->si_errno); 2199 if (si->si_errno != 0 && err != NULL) { 2200 st->print("si_errno=%s", err); 2201 } else { 2202 st->print("si_errno=%d", si->si_errno); 2203 } 2204 const int c = si->si_code; 2205 assert(c > 0, "unexpected si_code"); 2206 switch (si->si_signo) { 2207 case SIGILL: 2208 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2209 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2210 break; 2211 case SIGFPE: 2212 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2213 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2214 break; 2215 case SIGSEGV: 2216 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2217 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2218 break; 2219 case SIGBUS: 2220 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2221 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2222 break; 2223 default: 2224 st->print(", si_code=%d", si->si_code); 2225 // no si_addr 2226 } 2227 2228 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2229 UseSharedSpaces) { 2230 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2231 if (mapinfo->is_in_shared_space(si->si_addr)) { 2232 st->print("\n\nError accessing class data sharing archive." \ 2233 " Mapped file inaccessible during execution, " \ 2234 " possible disk/network problem."); 2235 } 2236 } 2237 st->cr(); 2238} 2239 2240// Moved from whole group, because we need them here for diagnostic 2241// prints. 2242#define OLDMAXSIGNUM 32 2243static int Maxsignum = 0; 2244static int *ourSigFlags = NULL; 2245 2246extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2247 2248int os::Solaris::get_our_sigflags(int sig) { 2249 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2250 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2251 return ourSigFlags[sig]; 2252} 2253 2254void os::Solaris::set_our_sigflags(int sig, int flags) { 2255 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2256 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2257 ourSigFlags[sig] = flags; 2258} 2259 2260 2261static const char* get_signal_handler_name(address handler, 2262 char* buf, int buflen) { 2263 int offset; 2264 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2265 if (found) { 2266 // skip directory names 2267 const char *p1, *p2; 2268 p1 = buf; 2269 size_t len = strlen(os::file_separator()); 2270 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2271 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2272 } else { 2273 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2274 } 2275 return buf; 2276} 2277 2278static void print_signal_handler(outputStream* st, int sig, 2279 char* buf, size_t buflen) { 2280 struct sigaction sa; 2281 2282 sigaction(sig, NULL, &sa); 2283 2284 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2285 2286 address handler = (sa.sa_flags & SA_SIGINFO) 2287 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2288 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2289 2290 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2291 st->print("SIG_DFL"); 2292 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2293 st->print("SIG_IGN"); 2294 } else { 2295 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2296 } 2297 2298 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2299 2300 address rh = VMError::get_resetted_sighandler(sig); 2301 // May be, handler was resetted by VMError? 2302 if(rh != NULL) { 2303 handler = rh; 2304 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2305 } 2306 2307 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2308 2309 // Check: is it our handler? 2310 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2311 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2312 // It is our signal handler 2313 // check for flags 2314 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2315 st->print( 2316 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2317 os::Solaris::get_our_sigflags(sig)); 2318 } 2319 } 2320 st->cr(); 2321} 2322 2323void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2324 st->print_cr("Signal Handlers:"); 2325 print_signal_handler(st, SIGSEGV, buf, buflen); 2326 print_signal_handler(st, SIGBUS , buf, buflen); 2327 print_signal_handler(st, SIGFPE , buf, buflen); 2328 print_signal_handler(st, SIGPIPE, buf, buflen); 2329 print_signal_handler(st, SIGXFSZ, buf, buflen); 2330 print_signal_handler(st, SIGILL , buf, buflen); 2331 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2332 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2333 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2334 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2335 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2336 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2337 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2338 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2339} 2340 2341static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2342 2343// Find the full path to the current module, libjvm.so or libjvm_g.so 2344void os::jvm_path(char *buf, jint buflen) { 2345 // Error checking. 2346 if (buflen < MAXPATHLEN) { 2347 assert(false, "must use a large-enough buffer"); 2348 buf[0] = '\0'; 2349 return; 2350 } 2351 // Lazy resolve the path to current module. 2352 if (saved_jvm_path[0] != 0) { 2353 strcpy(buf, saved_jvm_path); 2354 return; 2355 } 2356 2357 Dl_info dlinfo; 2358 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2359 assert(ret != 0, "cannot locate libjvm"); 2360 realpath((char *)dlinfo.dli_fname, buf); 2361 2362 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2363 // Support for the gamma launcher. Typical value for buf is 2364 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2365 // the right place in the string, then assume we are installed in a JDK and 2366 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2367 // up the path so it looks like libjvm.so is installed there (append a 2368 // fake suffix hotspot/libjvm.so). 2369 const char *p = buf + strlen(buf) - 1; 2370 for (int count = 0; p > buf && count < 5; ++count) { 2371 for (--p; p > buf && *p != '/'; --p) 2372 /* empty */ ; 2373 } 2374 2375 if (strncmp(p, "/jre/lib/", 9) != 0) { 2376 // Look for JAVA_HOME in the environment. 2377 char* java_home_var = ::getenv("JAVA_HOME"); 2378 if (java_home_var != NULL && java_home_var[0] != 0) { 2379 char cpu_arch[12]; 2380 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2381#ifdef _LP64 2382 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2383 if (strcmp(cpu_arch, "sparc") == 0) { 2384 strcat(cpu_arch, "v9"); 2385 } else if (strcmp(cpu_arch, "i386") == 0) { 2386 strcpy(cpu_arch, "amd64"); 2387 } 2388#endif 2389 // Check the current module name "libjvm.so" or "libjvm_g.so". 2390 p = strrchr(buf, '/'); 2391 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2392 p = strstr(p, "_g") ? "_g" : ""; 2393 2394 realpath(java_home_var, buf); 2395 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2396 if (0 == access(buf, F_OK)) { 2397 // Use current module name "libjvm[_g].so" instead of 2398 // "libjvm"debug_only("_g")".so" since for fastdebug version 2399 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2400 // It is used when we are choosing the HPI library's name 2401 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2402 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2403 } else { 2404 // Go back to path of .so 2405 realpath((char *)dlinfo.dli_fname, buf); 2406 } 2407 } 2408 } 2409 } 2410 2411 strcpy(saved_jvm_path, buf); 2412} 2413 2414 2415void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2416 // no prefix required, not even "_" 2417} 2418 2419 2420void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2421 // no suffix required 2422} 2423 2424 2425// sun.misc.Signal 2426 2427extern "C" { 2428 static void UserHandler(int sig, void *siginfo, void *context) { 2429 // Ctrl-C is pressed during error reporting, likely because the error 2430 // handler fails to abort. Let VM die immediately. 2431 if (sig == SIGINT && is_error_reported()) { 2432 os::die(); 2433 } 2434 2435 os::signal_notify(sig); 2436 // We do not need to reinstate the signal handler each time... 2437 } 2438} 2439 2440void* os::user_handler() { 2441 return CAST_FROM_FN_PTR(void*, UserHandler); 2442} 2443 2444extern "C" { 2445 typedef void (*sa_handler_t)(int); 2446 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2447} 2448 2449void* os::signal(int signal_number, void* handler) { 2450 struct sigaction sigAct, oldSigAct; 2451 sigfillset(&(sigAct.sa_mask)); 2452 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2453 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2454 2455 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2456 // -1 means registration failed 2457 return (void *)-1; 2458 2459 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2460} 2461 2462void os::signal_raise(int signal_number) { 2463 raise(signal_number); 2464} 2465 2466/* 2467 * The following code is moved from os.cpp for making this 2468 * code platform specific, which it is by its very nature. 2469 */ 2470 2471// a counter for each possible signal value 2472static int Sigexit = 0; 2473static int Maxlibjsigsigs; 2474static jint *pending_signals = NULL; 2475static int *preinstalled_sigs = NULL; 2476static struct sigaction *chainedsigactions = NULL; 2477static sema_t sig_sem; 2478typedef int (*version_getting_t)(); 2479version_getting_t os::Solaris::get_libjsig_version = NULL; 2480static int libjsigversion = NULL; 2481 2482int os::sigexitnum_pd() { 2483 assert(Sigexit > 0, "signal memory not yet initialized"); 2484 return Sigexit; 2485} 2486 2487void os::Solaris::init_signal_mem() { 2488 // Initialize signal structures 2489 Maxsignum = SIGRTMAX; 2490 Sigexit = Maxsignum+1; 2491 assert(Maxsignum >0, "Unable to obtain max signal number"); 2492 2493 Maxlibjsigsigs = Maxsignum; 2494 2495 // pending_signals has one int per signal 2496 // The additional signal is for SIGEXIT - exit signal to signal_thread 2497 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2498 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2499 2500 if (UseSignalChaining) { 2501 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2502 * (Maxsignum + 1)); 2503 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2504 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2505 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2506 } 2507 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2508 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2509} 2510 2511void os::signal_init_pd() { 2512 int ret; 2513 2514 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2515 assert(ret == 0, "sema_init() failed"); 2516} 2517 2518void os::signal_notify(int signal_number) { 2519 int ret; 2520 2521 Atomic::inc(&pending_signals[signal_number]); 2522 ret = ::sema_post(&sig_sem); 2523 assert(ret == 0, "sema_post() failed"); 2524} 2525 2526static int check_pending_signals(bool wait_for_signal) { 2527 int ret; 2528 while (true) { 2529 for (int i = 0; i < Sigexit + 1; i++) { 2530 jint n = pending_signals[i]; 2531 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2532 return i; 2533 } 2534 } 2535 if (!wait_for_signal) { 2536 return -1; 2537 } 2538 JavaThread *thread = JavaThread::current(); 2539 ThreadBlockInVM tbivm(thread); 2540 2541 bool threadIsSuspended; 2542 do { 2543 thread->set_suspend_equivalent(); 2544 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2545 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2546 ; 2547 assert(ret == 0, "sema_wait() failed"); 2548 2549 // were we externally suspended while we were waiting? 2550 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2551 if (threadIsSuspended) { 2552 // 2553 // The semaphore has been incremented, but while we were waiting 2554 // another thread suspended us. We don't want to continue running 2555 // while suspended because that would surprise the thread that 2556 // suspended us. 2557 // 2558 ret = ::sema_post(&sig_sem); 2559 assert(ret == 0, "sema_post() failed"); 2560 2561 thread->java_suspend_self(); 2562 } 2563 } while (threadIsSuspended); 2564 } 2565} 2566 2567int os::signal_lookup() { 2568 return check_pending_signals(false); 2569} 2570 2571int os::signal_wait() { 2572 return check_pending_signals(true); 2573} 2574 2575//////////////////////////////////////////////////////////////////////////////// 2576// Virtual Memory 2577 2578static int page_size = -1; 2579 2580// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2581// clear this var if support is not available. 2582static bool has_map_align = true; 2583 2584int os::vm_page_size() { 2585 assert(page_size != -1, "must call os::init"); 2586 return page_size; 2587} 2588 2589// Solaris allocates memory by pages. 2590int os::vm_allocation_granularity() { 2591 assert(page_size != -1, "must call os::init"); 2592 return page_size; 2593} 2594 2595bool os::commit_memory(char* addr, size_t bytes) { 2596 size_t size = bytes; 2597 return 2598 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2599 PROT_READ | PROT_WRITE | PROT_EXEC); 2600} 2601 2602bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2603 if (commit_memory(addr, bytes)) { 2604 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2605 // If the large page size has been set and the VM 2606 // is using large pages, use the large page size 2607 // if it is smaller than the alignment hint. This is 2608 // a case where the VM wants to use a larger alignment size 2609 // for its own reasons but still want to use large pages 2610 // (which is what matters to setting the mpss range. 2611 size_t page_size = 0; 2612 if (large_page_size() < alignment_hint) { 2613 assert(UseLargePages, "Expected to be here for large page use only"); 2614 page_size = large_page_size(); 2615 } else { 2616 // If the alignment hint is less than the large page 2617 // size, the VM wants a particular alignment (thus the hint) 2618 // for internal reasons. Try to set the mpss range using 2619 // the alignment_hint. 2620 page_size = alignment_hint; 2621 } 2622 // Since this is a hint, ignore any failures. 2623 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2624 } 2625 return true; 2626 } 2627 return false; 2628} 2629 2630// Uncommit the pages in a specified region. 2631void os::free_memory(char* addr, size_t bytes) { 2632 if (madvise(addr, bytes, MADV_FREE) < 0) { 2633 debug_only(warning("MADV_FREE failed.")); 2634 return; 2635 } 2636} 2637 2638// Change the page size in a given range. 2639void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2640 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2641 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2642 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2643} 2644 2645// Tell the OS to make the range local to the first-touching LWP 2646void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2647 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2648 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2649 debug_only(warning("MADV_ACCESS_LWP failed.")); 2650 } 2651} 2652 2653// Tell the OS that this range would be accessed from different LWPs. 2654void os::numa_make_global(char *addr, size_t bytes) { 2655 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2656 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2657 debug_only(warning("MADV_ACCESS_MANY failed.")); 2658 } 2659} 2660 2661// Get the number of the locality groups. 2662size_t os::numa_get_groups_num() { 2663 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2664 return n != -1 ? n : 1; 2665} 2666 2667// Get a list of leaf locality groups. A leaf lgroup is group that 2668// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2669// board. An LWP is assigned to one of these groups upon creation. 2670size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2671 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2672 ids[0] = 0; 2673 return 1; 2674 } 2675 int result_size = 0, top = 1, bottom = 0, cur = 0; 2676 for (int k = 0; k < size; k++) { 2677 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2678 (Solaris::lgrp_id_t*)&ids[top], size - top); 2679 if (r == -1) { 2680 ids[0] = 0; 2681 return 1; 2682 } 2683 if (!r) { 2684 // That's a leaf node. 2685 assert (bottom <= cur, "Sanity check"); 2686 // Check if the node has memory 2687 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2688 NULL, 0, LGRP_RSRC_MEM) > 0) { 2689 ids[bottom++] = ids[cur]; 2690 } 2691 } 2692 top += r; 2693 cur++; 2694 } 2695 return bottom; 2696} 2697 2698// Detect the topology change. Typically happens during CPU plugging-unplugging. 2699bool os::numa_topology_changed() { 2700 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2701 if (is_stale != -1 && is_stale) { 2702 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2703 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2704 assert(c != 0, "Failure to initialize LGRP API"); 2705 Solaris::set_lgrp_cookie(c); 2706 return true; 2707 } 2708 return false; 2709} 2710 2711// Get the group id of the current LWP. 2712int os::numa_get_group_id() { 2713 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2714 if (lgrp_id == -1) { 2715 return 0; 2716 } 2717 const int size = os::numa_get_groups_num(); 2718 int *ids = (int*)alloca(size * sizeof(int)); 2719 2720 // Get the ids of all lgroups with memory; r is the count. 2721 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2722 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2723 if (r <= 0) { 2724 return 0; 2725 } 2726 return ids[os::random() % r]; 2727} 2728 2729// Request information about the page. 2730bool os::get_page_info(char *start, page_info* info) { 2731 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2732 uint64_t addr = (uintptr_t)start; 2733 uint64_t outdata[2]; 2734 uint_t validity = 0; 2735 2736 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2737 return false; 2738 } 2739 2740 info->size = 0; 2741 info->lgrp_id = -1; 2742 2743 if ((validity & 1) != 0) { 2744 if ((validity & 2) != 0) { 2745 info->lgrp_id = outdata[0]; 2746 } 2747 if ((validity & 4) != 0) { 2748 info->size = outdata[1]; 2749 } 2750 return true; 2751 } 2752 return false; 2753} 2754 2755// Scan the pages from start to end until a page different than 2756// the one described in the info parameter is encountered. 2757char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2758 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2759 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2760 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2761 uint_t validity[MAX_MEMINFO_CNT]; 2762 2763 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2764 uint64_t p = (uint64_t)start; 2765 while (p < (uint64_t)end) { 2766 addrs[0] = p; 2767 size_t addrs_count = 1; 2768 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2769 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2770 addrs_count++; 2771 } 2772 2773 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2774 return NULL; 2775 } 2776 2777 size_t i = 0; 2778 for (; i < addrs_count; i++) { 2779 if ((validity[i] & 1) != 0) { 2780 if ((validity[i] & 4) != 0) { 2781 if (outdata[types * i + 1] != page_expected->size) { 2782 break; 2783 } 2784 } else 2785 if (page_expected->size != 0) { 2786 break; 2787 } 2788 2789 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2790 if (outdata[types * i] != page_expected->lgrp_id) { 2791 break; 2792 } 2793 } 2794 } else { 2795 return NULL; 2796 } 2797 } 2798 2799 if (i != addrs_count) { 2800 if ((validity[i] & 2) != 0) { 2801 page_found->lgrp_id = outdata[types * i]; 2802 } else { 2803 page_found->lgrp_id = -1; 2804 } 2805 if ((validity[i] & 4) != 0) { 2806 page_found->size = outdata[types * i + 1]; 2807 } else { 2808 page_found->size = 0; 2809 } 2810 return (char*)addrs[i]; 2811 } 2812 2813 p = addrs[addrs_count - 1] + page_size; 2814 } 2815 return end; 2816} 2817 2818bool os::uncommit_memory(char* addr, size_t bytes) { 2819 size_t size = bytes; 2820 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2821 // uncommitted page. Otherwise, the read/write might succeed if we 2822 // have enough swap space to back the physical page. 2823 return 2824 NULL != Solaris::mmap_chunk(addr, size, 2825 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2826 PROT_NONE); 2827} 2828 2829char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2830 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2831 2832 if (b == MAP_FAILED) { 2833 return NULL; 2834 } 2835 return b; 2836} 2837 2838char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2839 char* addr = requested_addr; 2840 int flags = MAP_PRIVATE | MAP_NORESERVE; 2841 2842 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2843 2844 if (fixed) { 2845 flags |= MAP_FIXED; 2846 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2847 flags |= MAP_ALIGN; 2848 addr = (char*) alignment_hint; 2849 } 2850 2851 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2852 // uncommitted page. Otherwise, the read/write might succeed if we 2853 // have enough swap space to back the physical page. 2854 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2855} 2856 2857char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2858 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2859 2860 guarantee(requested_addr == NULL || requested_addr == addr, 2861 "OS failed to return requested mmap address."); 2862 return addr; 2863} 2864 2865// Reserve memory at an arbitrary address, only if that area is 2866// available (and not reserved for something else). 2867 2868char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2869 const int max_tries = 10; 2870 char* base[max_tries]; 2871 size_t size[max_tries]; 2872 2873 // Solaris adds a gap between mmap'ed regions. The size of the gap 2874 // is dependent on the requested size and the MMU. Our initial gap 2875 // value here is just a guess and will be corrected later. 2876 bool had_top_overlap = false; 2877 bool have_adjusted_gap = false; 2878 size_t gap = 0x400000; 2879 2880 // Assert only that the size is a multiple of the page size, since 2881 // that's all that mmap requires, and since that's all we really know 2882 // about at this low abstraction level. If we need higher alignment, 2883 // we can either pass an alignment to this method or verify alignment 2884 // in one of the methods further up the call chain. See bug 5044738. 2885 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2886 2887 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2888 // Give it a try, if the kernel honors the hint we can return immediately. 2889 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2890 volatile int err = errno; 2891 if (addr == requested_addr) { 2892 return addr; 2893 } else if (addr != NULL) { 2894 unmap_memory(addr, bytes); 2895 } 2896 2897 if (PrintMiscellaneous && Verbose) { 2898 char buf[256]; 2899 buf[0] = '\0'; 2900 if (addr == NULL) { 2901 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2902 } 2903 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2904 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2905 "%s", bytes, requested_addr, addr, buf); 2906 } 2907 2908 // Address hint method didn't work. Fall back to the old method. 2909 // In theory, once SNV becomes our oldest supported platform, this 2910 // code will no longer be needed. 2911 // 2912 // Repeatedly allocate blocks until the block is allocated at the 2913 // right spot. Give up after max_tries. 2914 int i; 2915 for (i = 0; i < max_tries; ++i) { 2916 base[i] = reserve_memory(bytes); 2917 2918 if (base[i] != NULL) { 2919 // Is this the block we wanted? 2920 if (base[i] == requested_addr) { 2921 size[i] = bytes; 2922 break; 2923 } 2924 2925 // check that the gap value is right 2926 if (had_top_overlap && !have_adjusted_gap) { 2927 size_t actual_gap = base[i-1] - base[i] - bytes; 2928 if (gap != actual_gap) { 2929 // adjust the gap value and retry the last 2 allocations 2930 assert(i > 0, "gap adjustment code problem"); 2931 have_adjusted_gap = true; // adjust the gap only once, just in case 2932 gap = actual_gap; 2933 if (PrintMiscellaneous && Verbose) { 2934 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2935 } 2936 unmap_memory(base[i], bytes); 2937 unmap_memory(base[i-1], size[i-1]); 2938 i-=2; 2939 continue; 2940 } 2941 } 2942 2943 // Does this overlap the block we wanted? Give back the overlapped 2944 // parts and try again. 2945 // 2946 // There is still a bug in this code: if top_overlap == bytes, 2947 // the overlap is offset from requested region by the value of gap. 2948 // In this case giving back the overlapped part will not work, 2949 // because we'll give back the entire block at base[i] and 2950 // therefore the subsequent allocation will not generate a new gap. 2951 // This could be fixed with a new algorithm that used larger 2952 // or variable size chunks to find the requested region - 2953 // but such a change would introduce additional complications. 2954 // It's rare enough that the planets align for this bug, 2955 // so we'll just wait for a fix for 6204603/5003415 which 2956 // will provide a mmap flag to allow us to avoid this business. 2957 2958 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2959 if (top_overlap >= 0 && top_overlap < bytes) { 2960 had_top_overlap = true; 2961 unmap_memory(base[i], top_overlap); 2962 base[i] += top_overlap; 2963 size[i] = bytes - top_overlap; 2964 } else { 2965 size_t bottom_overlap = base[i] + bytes - requested_addr; 2966 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2967 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2968 warning("attempt_reserve_memory_at: possible alignment bug"); 2969 } 2970 unmap_memory(requested_addr, bottom_overlap); 2971 size[i] = bytes - bottom_overlap; 2972 } else { 2973 size[i] = bytes; 2974 } 2975 } 2976 } 2977 } 2978 2979 // Give back the unused reserved pieces. 2980 2981 for (int j = 0; j < i; ++j) { 2982 if (base[j] != NULL) { 2983 unmap_memory(base[j], size[j]); 2984 } 2985 } 2986 2987 return (i < max_tries) ? requested_addr : NULL; 2988} 2989 2990bool os::release_memory(char* addr, size_t bytes) { 2991 size_t size = bytes; 2992 return munmap(addr, size) == 0; 2993} 2994 2995static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2996 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2997 "addr must be page aligned"); 2998 int retVal = mprotect(addr, bytes, prot); 2999 return retVal == 0; 3000} 3001 3002// Protect memory (make it read-only. (Used to pass readonly pages through 3003// JNI GetArray<type>Elements with empty arrays.) 3004bool os::protect_memory(char* addr, size_t bytes) { 3005 return solaris_mprotect(addr, bytes, PROT_READ); 3006} 3007 3008// guard_memory and unguard_memory only happens within stack guard pages. 3009// Since ISM pertains only to the heap, guard and unguard memory should not 3010/// happen with an ISM region. 3011bool os::guard_memory(char* addr, size_t bytes) { 3012 return solaris_mprotect(addr, bytes, PROT_NONE); 3013} 3014 3015bool os::unguard_memory(char* addr, size_t bytes) { 3016 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 3017} 3018 3019// Large page support 3020 3021// UseLargePages is the master flag to enable/disable large page memory. 3022// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3023// effects can be described in the following table: 3024// 3025// UseLargePages UseMPSS UseISM 3026// false * * => UseLargePages is the master switch, turning 3027// it off will turn off both UseMPSS and 3028// UseISM. VM will not use large page memory 3029// regardless the settings of UseMPSS/UseISM. 3030// true false false => Unless future Solaris provides other 3031// mechanism to use large page memory, this 3032// combination is equivalent to -UseLargePages, 3033// VM will not use large page memory 3034// true true false => JVM will use MPSS for large page memory. 3035// This is the default behavior. 3036// true false true => JVM will use ISM for large page memory. 3037// true true true => JVM will use ISM if it is available. 3038// Otherwise, JVM will fall back to MPSS. 3039// Becaues ISM is now available on all 3040// supported Solaris versions, this combination 3041// is equivalent to +UseISM -UseMPSS. 3042 3043typedef int (*getpagesizes_func_type) (size_t[], int); 3044static size_t _large_page_size = 0; 3045 3046bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3047 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3048 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3049 // can support multiple page sizes. 3050 3051 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3052 // ISM is only recommended on old Solaris where there is no MPSS support. 3053 // Simply choose a conservative value as default. 3054 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3055 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3056 3057 // ISM is available on all supported Solaris versions 3058 return true; 3059} 3060 3061// Insertion sort for small arrays (descending order). 3062static void insertion_sort_descending(size_t* array, int len) { 3063 for (int i = 0; i < len; i++) { 3064 size_t val = array[i]; 3065 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3066 size_t tmp = array[key]; 3067 array[key] = array[key - 1]; 3068 array[key - 1] = tmp; 3069 } 3070 } 3071} 3072 3073bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3074 getpagesizes_func_type getpagesizes_func = 3075 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3076 if (getpagesizes_func == NULL) { 3077 if (warn) { 3078 warning("MPSS is not supported by the operating system."); 3079 } 3080 return false; 3081 } 3082 3083 const unsigned int usable_count = VM_Version::page_size_count(); 3084 if (usable_count == 1) { 3085 return false; 3086 } 3087 3088 // Fill the array of page sizes. 3089 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3090 assert(n > 0, "Solaris bug?"); 3091 if (n == page_sizes_max) { 3092 // Add a sentinel value (necessary only if the array was completely filled 3093 // since it is static (zeroed at initialization)). 3094 _page_sizes[--n] = 0; 3095 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3096 } 3097 assert(_page_sizes[n] == 0, "missing sentinel"); 3098 3099 if (n == 1) return false; // Only one page size available. 3100 3101 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3102 // select up to usable_count elements. First sort the array, find the first 3103 // acceptable value, then copy the usable sizes to the top of the array and 3104 // trim the rest. Make sure to include the default page size :-). 3105 // 3106 // A better policy could get rid of the 4M limit by taking the sizes of the 3107 // important VM memory regions (java heap and possibly the code cache) into 3108 // account. 3109 insertion_sort_descending(_page_sizes, n); 3110 const size_t size_limit = 3111 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3112 int beg; 3113 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3114 const int end = MIN2((int)usable_count, n) - 1; 3115 for (int cur = 0; cur < end; ++cur, ++beg) { 3116 _page_sizes[cur] = _page_sizes[beg]; 3117 } 3118 _page_sizes[end] = vm_page_size(); 3119 _page_sizes[end + 1] = 0; 3120 3121 if (_page_sizes[end] > _page_sizes[end - 1]) { 3122 // Default page size is not the smallest; sort again. 3123 insertion_sort_descending(_page_sizes, end + 1); 3124 } 3125 *page_size = _page_sizes[0]; 3126 3127 return true; 3128} 3129 3130bool os::large_page_init() { 3131 if (!UseLargePages) { 3132 UseISM = false; 3133 UseMPSS = false; 3134 return false; 3135 } 3136 3137 // print a warning if any large page related flag is specified on command line 3138 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3139 !FLAG_IS_DEFAULT(UseISM) || 3140 !FLAG_IS_DEFAULT(UseMPSS) || 3141 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3142 UseISM = UseISM && 3143 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3144 if (UseISM) { 3145 // ISM disables MPSS to be compatible with old JDK behavior 3146 UseMPSS = false; 3147 _page_sizes[0] = _large_page_size; 3148 _page_sizes[1] = vm_page_size(); 3149 } 3150 3151 UseMPSS = UseMPSS && 3152 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3153 3154 UseLargePages = UseISM || UseMPSS; 3155 return UseLargePages; 3156} 3157 3158bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3159 // Signal to OS that we want large pages for addresses 3160 // from addr, addr + bytes 3161 struct memcntl_mha mpss_struct; 3162 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3163 mpss_struct.mha_pagesize = align; 3164 mpss_struct.mha_flags = 0; 3165 if (memcntl(start, bytes, MC_HAT_ADVISE, 3166 (caddr_t) &mpss_struct, 0, 0) < 0) { 3167 debug_only(warning("Attempt to use MPSS failed.")); 3168 return false; 3169 } 3170 return true; 3171} 3172 3173char* os::reserve_memory_special(size_t bytes) { 3174 assert(UseLargePages && UseISM, "only for ISM large pages"); 3175 3176 size_t size = bytes; 3177 char* retAddr = NULL; 3178 int shmid; 3179 key_t ismKey; 3180 3181 bool warn_on_failure = UseISM && 3182 (!FLAG_IS_DEFAULT(UseLargePages) || 3183 !FLAG_IS_DEFAULT(UseISM) || 3184 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3185 ); 3186 char msg[128]; 3187 3188 ismKey = IPC_PRIVATE; 3189 3190 // Create a large shared memory region to attach to based on size. 3191 // Currently, size is the total size of the heap 3192 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3193 if (shmid == -1){ 3194 if (warn_on_failure) { 3195 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3196 warning(msg); 3197 } 3198 return NULL; 3199 } 3200 3201 // Attach to the region 3202 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3203 int err = errno; 3204 3205 // Remove shmid. If shmat() is successful, the actual shared memory segment 3206 // will be deleted when it's detached by shmdt() or when the process 3207 // terminates. If shmat() is not successful this will remove the shared 3208 // segment immediately. 3209 shmctl(shmid, IPC_RMID, NULL); 3210 3211 if (retAddr == (char *) -1) { 3212 if (warn_on_failure) { 3213 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3214 warning(msg); 3215 } 3216 return NULL; 3217 } 3218 3219 return retAddr; 3220} 3221 3222bool os::release_memory_special(char* base, size_t bytes) { 3223 // detaching the SHM segment will also delete it, see reserve_memory_special() 3224 int rslt = shmdt(base); 3225 return rslt == 0; 3226} 3227 3228size_t os::large_page_size() { 3229 return _large_page_size; 3230} 3231 3232// MPSS allows application to commit large page memory on demand; with ISM 3233// the entire memory region must be allocated as shared memory. 3234bool os::can_commit_large_page_memory() { 3235 return UseISM ? false : true; 3236} 3237 3238bool os::can_execute_large_page_memory() { 3239 return UseISM ? false : true; 3240} 3241 3242static int os_sleep(jlong millis, bool interruptible) { 3243 const jlong limit = INT_MAX; 3244 jlong prevtime; 3245 int res; 3246 3247 while (millis > limit) { 3248 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3249 return res; 3250 millis -= limit; 3251 } 3252 3253 // Restart interrupted polls with new parameters until the proper delay 3254 // has been completed. 3255 3256 prevtime = getTimeMillis(); 3257 3258 while (millis > 0) { 3259 jlong newtime; 3260 3261 if (!interruptible) { 3262 // Following assert fails for os::yield_all: 3263 // assert(!thread->is_Java_thread(), "must not be java thread"); 3264 res = poll(NULL, 0, millis); 3265 } else { 3266 JavaThread *jt = JavaThread::current(); 3267 3268 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3269 os::Solaris::clear_interrupted); 3270 } 3271 3272 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3273 // thread.Interrupt. 3274 3275 if((res == OS_ERR) && (errno == EINTR)) { 3276 newtime = getTimeMillis(); 3277 assert(newtime >= prevtime, "time moving backwards"); 3278 /* Doing prevtime and newtime in microseconds doesn't help precision, 3279 and trying to round up to avoid lost milliseconds can result in a 3280 too-short delay. */ 3281 millis -= newtime - prevtime; 3282 if(millis <= 0) 3283 return OS_OK; 3284 prevtime = newtime; 3285 } else 3286 return res; 3287 } 3288 3289 return OS_OK; 3290} 3291 3292// Read calls from inside the vm need to perform state transitions 3293size_t os::read(int fd, void *buf, unsigned int nBytes) { 3294 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3295} 3296 3297int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3298 assert(thread == Thread::current(), "thread consistency check"); 3299 3300 // TODO-FIXME: this should be removed. 3301 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3302 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3303 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3304 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3305 // is fooled into believing that the system is making progress. In the code below we block the 3306 // the watcher thread while safepoint is in progress so that it would not appear as though the 3307 // system is making progress. 3308 if (!Solaris::T2_libthread() && 3309 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3310 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3311 // the entire safepoint, the watcher thread will line up here during the safepoint. 3312 Threads_lock->lock_without_safepoint_check(); 3313 Threads_lock->unlock(); 3314 } 3315 3316 if (thread->is_Java_thread()) { 3317 // This is a JavaThread so we honor the _thread_blocked protocol 3318 // even for sleeps of 0 milliseconds. This was originally done 3319 // as a workaround for bug 4338139. However, now we also do it 3320 // to honor the suspend-equivalent protocol. 3321 3322 JavaThread *jt = (JavaThread *) thread; 3323 ThreadBlockInVM tbivm(jt); 3324 3325 jt->set_suspend_equivalent(); 3326 // cleared by handle_special_suspend_equivalent_condition() or 3327 // java_suspend_self() via check_and_wait_while_suspended() 3328 3329 int ret_code; 3330 if (millis <= 0) { 3331 thr_yield(); 3332 ret_code = 0; 3333 } else { 3334 // The original sleep() implementation did not create an 3335 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3336 // I'm preserving that decision for now. 3337 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3338 3339 ret_code = os_sleep(millis, interruptible); 3340 } 3341 3342 // were we externally suspended while we were waiting? 3343 jt->check_and_wait_while_suspended(); 3344 3345 return ret_code; 3346 } 3347 3348 // non-JavaThread from this point on: 3349 3350 if (millis <= 0) { 3351 thr_yield(); 3352 return 0; 3353 } 3354 3355 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3356 3357 return os_sleep(millis, interruptible); 3358} 3359 3360int os::naked_sleep() { 3361 // %% make the sleep time an integer flag. for now use 1 millisec. 3362 return os_sleep(1, false); 3363} 3364 3365// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3366void os::infinite_sleep() { 3367 while (true) { // sleep forever ... 3368 ::sleep(100); // ... 100 seconds at a time 3369 } 3370} 3371 3372// Used to convert frequent JVM_Yield() to nops 3373bool os::dont_yield() { 3374 if (DontYieldALot) { 3375 static hrtime_t last_time = 0; 3376 hrtime_t diff = getTimeNanos() - last_time; 3377 3378 if (diff < DontYieldALotInterval * 1000000) 3379 return true; 3380 3381 last_time += diff; 3382 3383 return false; 3384 } 3385 else { 3386 return false; 3387 } 3388} 3389 3390// Caveat: Solaris os::yield() causes a thread-state transition whereas 3391// the linux and win32 implementations do not. This should be checked. 3392 3393void os::yield() { 3394 // Yields to all threads with same or greater priority 3395 os::sleep(Thread::current(), 0, false); 3396} 3397 3398// Note that yield semantics are defined by the scheduling class to which 3399// the thread currently belongs. Typically, yield will _not yield to 3400// other equal or higher priority threads that reside on the dispatch queues 3401// of other CPUs. 3402 3403os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3404 3405 3406// On Solaris we found that yield_all doesn't always yield to all other threads. 3407// There have been cases where there is a thread ready to execute but it doesn't 3408// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3409// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3410// SIGWAITING signal which will cause a new lwp to be created. So we count the 3411// number of times yield_all is called in the one loop and increase the sleep 3412// time after 8 attempts. If this fails too we increase the concurrency level 3413// so that the starving thread would get an lwp 3414 3415void os::yield_all(int attempts) { 3416 // Yields to all threads, including threads with lower priorities 3417 if (attempts == 0) { 3418 os::sleep(Thread::current(), 1, false); 3419 } else { 3420 int iterations = attempts % 30; 3421 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3422 // thr_setconcurrency and _getconcurrency make sense only under T1. 3423 int noofLWPS = thr_getconcurrency(); 3424 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3425 thr_setconcurrency(thr_getconcurrency() + 1); 3426 } 3427 } else if (iterations < 25) { 3428 os::sleep(Thread::current(), 1, false); 3429 } else { 3430 os::sleep(Thread::current(), 10, false); 3431 } 3432 } 3433} 3434 3435// Called from the tight loops to possibly influence time-sharing heuristics 3436void os::loop_breaker(int attempts) { 3437 os::yield_all(attempts); 3438} 3439 3440 3441// Interface for setting lwp priorities. If we are using T2 libthread, 3442// which forces the use of BoundThreads or we manually set UseBoundThreads, 3443// all of our threads will be assigned to real lwp's. Using the thr_setprio 3444// function is meaningless in this mode so we must adjust the real lwp's priority 3445// The routines below implement the getting and setting of lwp priorities. 3446// 3447// Note: There are three priority scales used on Solaris. Java priotities 3448// which range from 1 to 10, libthread "thr_setprio" scale which range 3449// from 0 to 127, and the current scheduling class of the process we 3450// are running in. This is typically from -60 to +60. 3451// The setting of the lwp priorities in done after a call to thr_setprio 3452// so Java priorities are mapped to libthread priorities and we map from 3453// the latter to lwp priorities. We don't keep priorities stored in 3454// Java priorities since some of our worker threads want to set priorities 3455// higher than all Java threads. 3456// 3457// For related information: 3458// (1) man -s 2 priocntl 3459// (2) man -s 4 priocntl 3460// (3) man dispadmin 3461// = librt.so 3462// = libthread/common/rtsched.c - thrp_setlwpprio(). 3463// = ps -cL <pid> ... to validate priority. 3464// = sched_get_priority_min and _max 3465// pthread_create 3466// sched_setparam 3467// pthread_setschedparam 3468// 3469// Assumptions: 3470// + We assume that all threads in the process belong to the same 3471// scheduling class. IE. an homogenous process. 3472// + Must be root or in IA group to change change "interactive" attribute. 3473// Priocntl() will fail silently. The only indication of failure is when 3474// we read-back the value and notice that it hasn't changed. 3475// + Interactive threads enter the runq at the head, non-interactive at the tail. 3476// + For RT, change timeslice as well. Invariant: 3477// constant "priority integral" 3478// Konst == TimeSlice * (60-Priority) 3479// Given a priority, compute appropriate timeslice. 3480// + Higher numerical values have higher priority. 3481 3482// sched class attributes 3483typedef struct { 3484 int schedPolicy; // classID 3485 int maxPrio; 3486 int minPrio; 3487} SchedInfo; 3488 3489 3490static SchedInfo tsLimits, iaLimits, rtLimits; 3491 3492#ifdef ASSERT 3493static int ReadBackValidate = 1; 3494#endif 3495static int myClass = 0; 3496static int myMin = 0; 3497static int myMax = 0; 3498static int myCur = 0; 3499static bool priocntl_enable = false; 3500 3501 3502// Call the version of priocntl suitable for all supported versions 3503// of Solaris. We need to call through this wrapper so that we can 3504// build on Solaris 9 and run on Solaris 8, 9 and 10. 3505// 3506// This code should be removed if we ever stop supporting Solaris 8 3507// and earlier releases. 3508 3509static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3510typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3511static priocntl_type priocntl_ptr = priocntl_stub; 3512 3513// Stub to set the value of the real pointer, and then call the real 3514// function. 3515 3516static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3517 // Try Solaris 8- name only. 3518 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3519 guarantee(tmp != NULL, "priocntl function not found."); 3520 priocntl_ptr = tmp; 3521 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3522} 3523 3524 3525// lwp_priocntl_init 3526// 3527// Try to determine the priority scale for our process. 3528// 3529// Return errno or 0 if OK. 3530// 3531static 3532int lwp_priocntl_init () 3533{ 3534 int rslt; 3535 pcinfo_t ClassInfo; 3536 pcparms_t ParmInfo; 3537 int i; 3538 3539 if (!UseThreadPriorities) return 0; 3540 3541 // We are using Bound threads, we need to determine our priority ranges 3542 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3543 // If ThreadPriorityPolicy is 1, switch tables 3544 if (ThreadPriorityPolicy == 1) { 3545 for (i = 0 ; i < MaxPriority+1; i++) 3546 os::java_to_os_priority[i] = prio_policy1[i]; 3547 } 3548 } 3549 // Not using Bound Threads, set to ThreadPolicy 1 3550 else { 3551 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3552 os::java_to_os_priority[i] = prio_policy1[i]; 3553 } 3554 return 0; 3555 } 3556 3557 3558 // Get IDs for a set of well-known scheduling classes. 3559 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3560 // the system. We should have a loop that iterates over the 3561 // classID values, which are known to be "small" integers. 3562 3563 strcpy(ClassInfo.pc_clname, "TS"); 3564 ClassInfo.pc_cid = -1; 3565 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3566 if (rslt < 0) return errno; 3567 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3568 tsLimits.schedPolicy = ClassInfo.pc_cid; 3569 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3570 tsLimits.minPrio = -tsLimits.maxPrio; 3571 3572 strcpy(ClassInfo.pc_clname, "IA"); 3573 ClassInfo.pc_cid = -1; 3574 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3575 if (rslt < 0) return errno; 3576 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3577 iaLimits.schedPolicy = ClassInfo.pc_cid; 3578 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3579 iaLimits.minPrio = -iaLimits.maxPrio; 3580 3581 strcpy(ClassInfo.pc_clname, "RT"); 3582 ClassInfo.pc_cid = -1; 3583 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3584 if (rslt < 0) return errno; 3585 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3586 rtLimits.schedPolicy = ClassInfo.pc_cid; 3587 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3588 rtLimits.minPrio = 0; 3589 3590 3591 // Query our "current" scheduling class. 3592 // This will normally be IA,TS or, rarely, RT. 3593 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3594 ParmInfo.pc_cid = PC_CLNULL; 3595 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3596 if ( rslt < 0 ) return errno; 3597 myClass = ParmInfo.pc_cid; 3598 3599 // We now know our scheduling classId, get specific information 3600 // the class. 3601 ClassInfo.pc_cid = myClass; 3602 ClassInfo.pc_clname[0] = 0; 3603 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3604 if ( rslt < 0 ) return errno; 3605 3606 if (ThreadPriorityVerbose) 3607 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3608 3609 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3610 ParmInfo.pc_cid = PC_CLNULL; 3611 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3612 if (rslt < 0) return errno; 3613 3614 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3615 myMin = rtLimits.minPrio; 3616 myMax = rtLimits.maxPrio; 3617 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3618 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3619 myMin = iaLimits.minPrio; 3620 myMax = iaLimits.maxPrio; 3621 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3622 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3623 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3624 myMin = tsLimits.minPrio; 3625 myMax = tsLimits.maxPrio; 3626 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3627 } else { 3628 // No clue - punt 3629 if (ThreadPriorityVerbose) 3630 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3631 return EINVAL; // no clue, punt 3632 } 3633 3634 if (ThreadPriorityVerbose) 3635 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3636 3637 priocntl_enable = true; // Enable changing priorities 3638 return 0; 3639} 3640 3641#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3642#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3643#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3644 3645 3646// scale_to_lwp_priority 3647// 3648// Convert from the libthread "thr_setprio" scale to our current 3649// lwp scheduling class scale. 3650// 3651static 3652int scale_to_lwp_priority (int rMin, int rMax, int x) 3653{ 3654 int v; 3655 3656 if (x == 127) return rMax; // avoid round-down 3657 v = (((x*(rMax-rMin)))/128)+rMin; 3658 return v; 3659} 3660 3661 3662// set_lwp_priority 3663// 3664// Set the priority of the lwp. This call should only be made 3665// when using bound threads (T2 threads are bound by default). 3666// 3667int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3668{ 3669 int rslt; 3670 int Actual, Expected, prv; 3671 pcparms_t ParmInfo; // for GET-SET 3672#ifdef ASSERT 3673 pcparms_t ReadBack; // for readback 3674#endif 3675 3676 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3677 // Query current values. 3678 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3679 // Cache "pcparms_t" in global ParmCache. 3680 // TODO: elide set-to-same-value 3681 3682 // If something went wrong on init, don't change priorities. 3683 if ( !priocntl_enable ) { 3684 if (ThreadPriorityVerbose) 3685 tty->print_cr("Trying to set priority but init failed, ignoring"); 3686 return EINVAL; 3687 } 3688 3689 3690 // If lwp hasn't started yet, just return 3691 // the _start routine will call us again. 3692 if ( lwpid <= 0 ) { 3693 if (ThreadPriorityVerbose) { 3694 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3695 ThreadID, newPrio); 3696 } 3697 return 0; 3698 } 3699 3700 if (ThreadPriorityVerbose) { 3701 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3702 ThreadID, lwpid, newPrio); 3703 } 3704 3705 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3706 ParmInfo.pc_cid = PC_CLNULL; 3707 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3708 if (rslt < 0) return errno; 3709 3710 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3711 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3712 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3713 rtInfo->rt_tqsecs = RT_NOCHANGE; 3714 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3715 if (ThreadPriorityVerbose) { 3716 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3717 } 3718 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3719 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3720 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3721 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3722 iaInfo->ia_uprilim = IA_NOCHANGE; 3723 iaInfo->ia_nice = IA_NOCHANGE; 3724 iaInfo->ia_mode = IA_NOCHANGE; 3725 if (ThreadPriorityVerbose) { 3726 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3727 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3728 } 3729 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3730 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3731 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3732 prv = tsInfo->ts_upri; 3733 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3734 tsInfo->ts_uprilim = IA_NOCHANGE; 3735 if (ThreadPriorityVerbose) { 3736 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3737 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3738 } 3739 if (prv == tsInfo->ts_upri) return 0; 3740 } else { 3741 if ( ThreadPriorityVerbose ) { 3742 tty->print_cr ("Unknown scheduling class\n"); 3743 } 3744 return EINVAL; // no clue, punt 3745 } 3746 3747 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3748 if (ThreadPriorityVerbose && rslt) { 3749 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3750 } 3751 if (rslt < 0) return errno; 3752 3753#ifdef ASSERT 3754 // Sanity check: read back what we just attempted to set. 3755 // In theory it could have changed in the interim ... 3756 // 3757 // The priocntl system call is tricky. 3758 // Sometimes it'll validate the priority value argument and 3759 // return EINVAL if unhappy. At other times it fails silently. 3760 // Readbacks are prudent. 3761 3762 if (!ReadBackValidate) return 0; 3763 3764 memset(&ReadBack, 0, sizeof(pcparms_t)); 3765 ReadBack.pc_cid = PC_CLNULL; 3766 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3767 assert(rslt >= 0, "priocntl failed"); 3768 Actual = Expected = 0xBAD; 3769 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3770 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3771 Actual = RTPRI(ReadBack)->rt_pri; 3772 Expected = RTPRI(ParmInfo)->rt_pri; 3773 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3774 Actual = IAPRI(ReadBack)->ia_upri; 3775 Expected = IAPRI(ParmInfo)->ia_upri; 3776 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3777 Actual = TSPRI(ReadBack)->ts_upri; 3778 Expected = TSPRI(ParmInfo)->ts_upri; 3779 } else { 3780 if ( ThreadPriorityVerbose ) { 3781 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3782 } 3783 } 3784 3785 if (Actual != Expected) { 3786 if ( ThreadPriorityVerbose ) { 3787 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3788 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3789 } 3790 } 3791#endif 3792 3793 return 0; 3794} 3795 3796 3797 3798// Solaris only gives access to 128 real priorities at a time, 3799// so we expand Java's ten to fill this range. This would be better 3800// if we dynamically adjusted relative priorities. 3801// 3802// The ThreadPriorityPolicy option allows us to select 2 different 3803// priority scales. 3804// 3805// ThreadPriorityPolicy=0 3806// Since the Solaris' default priority is MaximumPriority, we do not 3807// set a priority lower than Max unless a priority lower than 3808// NormPriority is requested. 3809// 3810// ThreadPriorityPolicy=1 3811// This mode causes the priority table to get filled with 3812// linear values. NormPriority get's mapped to 50% of the 3813// Maximum priority an so on. This will cause VM threads 3814// to get unfair treatment against other Solaris processes 3815// which do not explicitly alter their thread priorities. 3816// 3817 3818 3819int os::java_to_os_priority[MaxPriority + 1] = { 3820 -99999, // 0 Entry should never be used 3821 3822 0, // 1 MinPriority 3823 32, // 2 3824 64, // 3 3825 3826 96, // 4 3827 127, // 5 NormPriority 3828 127, // 6 3829 3830 127, // 7 3831 127, // 8 3832 127, // 9 NearMaxPriority 3833 3834 127 // 10 MaxPriority 3835}; 3836 3837 3838OSReturn os::set_native_priority(Thread* thread, int newpri) { 3839 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3840 if ( !UseThreadPriorities ) return OS_OK; 3841 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3842 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3843 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3844 thread->osthread()->lwp_id(), newpri )); 3845 return (status == 0) ? OS_OK : OS_ERR; 3846} 3847 3848 3849OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3850 int p; 3851 if ( !UseThreadPriorities ) { 3852 *priority_ptr = NormalPriority; 3853 return OS_OK; 3854 } 3855 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3856 if (status != 0) { 3857 return OS_ERR; 3858 } 3859 *priority_ptr = p; 3860 return OS_OK; 3861} 3862 3863 3864// Hint to the underlying OS that a task switch would not be good. 3865// Void return because it's a hint and can fail. 3866void os::hint_no_preempt() { 3867 schedctl_start(schedctl_init()); 3868} 3869 3870void os::interrupt(Thread* thread) { 3871 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3872 3873 OSThread* osthread = thread->osthread(); 3874 3875 int isInterrupted = osthread->interrupted(); 3876 if (!isInterrupted) { 3877 osthread->set_interrupted(true); 3878 OrderAccess::fence(); 3879 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3880 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3881 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3882 ParkEvent * const slp = thread->_SleepEvent ; 3883 if (slp != NULL) slp->unpark() ; 3884 } 3885 3886 // For JSR166: unpark after setting status but before thr_kill -dl 3887 if (thread->is_Java_thread()) { 3888 ((JavaThread*)thread)->parker()->unpark(); 3889 } 3890 3891 // Handle interruptible wait() ... 3892 ParkEvent * const ev = thread->_ParkEvent ; 3893 if (ev != NULL) ev->unpark() ; 3894 3895 // When events are used everywhere for os::sleep, then this thr_kill 3896 // will only be needed if UseVMInterruptibleIO is true. 3897 3898 if (!isInterrupted) { 3899 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3900 assert_status(status == 0, status, "thr_kill"); 3901 3902 // Bump thread interruption counter 3903 RuntimeService::record_thread_interrupt_signaled_count(); 3904 } 3905} 3906 3907 3908bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3909 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3910 3911 OSThread* osthread = thread->osthread(); 3912 3913 bool res = osthread->interrupted(); 3914 3915 // NOTE that since there is no "lock" around these two operations, 3916 // there is the possibility that the interrupted flag will be 3917 // "false" but that the interrupt event will be set. This is 3918 // intentional. The effect of this is that Object.wait() will appear 3919 // to have a spurious wakeup, which is not harmful, and the 3920 // possibility is so rare that it is not worth the added complexity 3921 // to add yet another lock. It has also been recommended not to put 3922 // the interrupted flag into the os::Solaris::Event structure, 3923 // because it hides the issue. 3924 if (res && clear_interrupted) { 3925 osthread->set_interrupted(false); 3926 } 3927 return res; 3928} 3929 3930 3931void os::print_statistics() { 3932} 3933 3934int os::message_box(const char* title, const char* message) { 3935 int i; 3936 fdStream err(defaultStream::error_fd()); 3937 for (i = 0; i < 78; i++) err.print_raw("="); 3938 err.cr(); 3939 err.print_raw_cr(title); 3940 for (i = 0; i < 78; i++) err.print_raw("-"); 3941 err.cr(); 3942 err.print_raw_cr(message); 3943 for (i = 0; i < 78; i++) err.print_raw("="); 3944 err.cr(); 3945 3946 char buf[16]; 3947 // Prevent process from exiting upon "read error" without consuming all CPU 3948 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3949 3950 return buf[0] == 'y' || buf[0] == 'Y'; 3951} 3952 3953// A lightweight implementation that does not suspend the target thread and 3954// thus returns only a hint. Used for profiling only! 3955ExtendedPC os::get_thread_pc(Thread* thread) { 3956 // Make sure that it is called by the watcher and the Threads lock is owned. 3957 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3958 // For now, is only used to profile the VM Thread 3959 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3960 ExtendedPC epc; 3961 3962 GetThreadPC_Callback cb(ProfileVM_lock); 3963 OSThread *osthread = thread->osthread(); 3964 const int time_to_wait = 400; // 400ms wait for initial response 3965 int status = cb.interrupt(thread, time_to_wait); 3966 3967 if (cb.is_done() ) { 3968 epc = cb.addr(); 3969 } else { 3970 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 3971 osthread->thread_id(), status);); 3972 // epc is already NULL 3973 } 3974 return epc; 3975} 3976 3977 3978// This does not do anything on Solaris. This is basically a hook for being 3979// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3980void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3981 f(value, method, args, thread); 3982} 3983 3984// This routine may be used by user applications as a "hook" to catch signals. 3985// The user-defined signal handler must pass unrecognized signals to this 3986// routine, and if it returns true (non-zero), then the signal handler must 3987// return immediately. If the flag "abort_if_unrecognized" is true, then this 3988// routine will never retun false (zero), but instead will execute a VM panic 3989// routine kill the process. 3990// 3991// If this routine returns false, it is OK to call it again. This allows 3992// the user-defined signal handler to perform checks either before or after 3993// the VM performs its own checks. Naturally, the user code would be making 3994// a serious error if it tried to handle an exception (such as a null check 3995// or breakpoint) that the VM was generating for its own correct operation. 3996// 3997// This routine may recognize any of the following kinds of signals: 3998// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3999// os::Solaris::SIGasync 4000// It should be consulted by handlers for any of those signals. 4001// It explicitly does not recognize os::Solaris::SIGinterrupt 4002// 4003// The caller of this routine must pass in the three arguments supplied 4004// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4005// field of the structure passed to sigaction(). This routine assumes that 4006// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4007// 4008// Note that the VM will print warnings if it detects conflicting signal 4009// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4010// 4011extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4012 4013 4014void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4015 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4016} 4017 4018/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4019 is needed to provoke threads blocked on IO to return an EINTR 4020 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4021 does NOT participate in signal chaining due to requirement for 4022 NOT setting SA_RESTART to make EINTR work. */ 4023extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4024 if (UseSignalChaining) { 4025 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4026 if (actp && actp->sa_handler) { 4027 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4028 } 4029 } 4030} 4031 4032// This boolean allows users to forward their own non-matching signals 4033// to JVM_handle_solaris_signal, harmlessly. 4034bool os::Solaris::signal_handlers_are_installed = false; 4035 4036// For signal-chaining 4037bool os::Solaris::libjsig_is_loaded = false; 4038typedef struct sigaction *(*get_signal_t)(int); 4039get_signal_t os::Solaris::get_signal_action = NULL; 4040 4041struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4042 struct sigaction *actp = NULL; 4043 4044 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4045 // Retrieve the old signal handler from libjsig 4046 actp = (*get_signal_action)(sig); 4047 } 4048 if (actp == NULL) { 4049 // Retrieve the preinstalled signal handler from jvm 4050 actp = get_preinstalled_handler(sig); 4051 } 4052 4053 return actp; 4054} 4055 4056static bool call_chained_handler(struct sigaction *actp, int sig, 4057 siginfo_t *siginfo, void *context) { 4058 // Call the old signal handler 4059 if (actp->sa_handler == SIG_DFL) { 4060 // It's more reasonable to let jvm treat it as an unexpected exception 4061 // instead of taking the default action. 4062 return false; 4063 } else if (actp->sa_handler != SIG_IGN) { 4064 if ((actp->sa_flags & SA_NODEFER) == 0) { 4065 // automaticlly block the signal 4066 sigaddset(&(actp->sa_mask), sig); 4067 } 4068 4069 sa_handler_t hand; 4070 sa_sigaction_t sa; 4071 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4072 // retrieve the chained handler 4073 if (siginfo_flag_set) { 4074 sa = actp->sa_sigaction; 4075 } else { 4076 hand = actp->sa_handler; 4077 } 4078 4079 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4080 actp->sa_handler = SIG_DFL; 4081 } 4082 4083 // try to honor the signal mask 4084 sigset_t oset; 4085 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4086 4087 // call into the chained handler 4088 if (siginfo_flag_set) { 4089 (*sa)(sig, siginfo, context); 4090 } else { 4091 (*hand)(sig); 4092 } 4093 4094 // restore the signal mask 4095 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4096 } 4097 // Tell jvm's signal handler the signal is taken care of. 4098 return true; 4099} 4100 4101bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4102 bool chained = false; 4103 // signal-chaining 4104 if (UseSignalChaining) { 4105 struct sigaction *actp = get_chained_signal_action(sig); 4106 if (actp != NULL) { 4107 chained = call_chained_handler(actp, sig, siginfo, context); 4108 } 4109 } 4110 return chained; 4111} 4112 4113struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4114 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4115 if (preinstalled_sigs[sig] != 0) { 4116 return &chainedsigactions[sig]; 4117 } 4118 return NULL; 4119} 4120 4121void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4122 4123 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4124 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4125 chainedsigactions[sig] = oldAct; 4126 preinstalled_sigs[sig] = 1; 4127} 4128 4129void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4130 // Check for overwrite. 4131 struct sigaction oldAct; 4132 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4133 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4134 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4135 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4136 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4137 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4138 if (AllowUserSignalHandlers || !set_installed) { 4139 // Do not overwrite; user takes responsibility to forward to us. 4140 return; 4141 } else if (UseSignalChaining) { 4142 if (oktochain) { 4143 // save the old handler in jvm 4144 save_preinstalled_handler(sig, oldAct); 4145 } else { 4146 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4147 } 4148 // libjsig also interposes the sigaction() call below and saves the 4149 // old sigaction on it own. 4150 } else { 4151 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4152 } 4153 } 4154 4155 struct sigaction sigAct; 4156 sigfillset(&(sigAct.sa_mask)); 4157 sigAct.sa_handler = SIG_DFL; 4158 4159 sigAct.sa_sigaction = signalHandler; 4160 // Handle SIGSEGV on alternate signal stack if 4161 // not using stack banging 4162 if (!UseStackBanging && sig == SIGSEGV) { 4163 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4164 // Interruptible i/o requires SA_RESTART cleared so EINTR 4165 // is returned instead of restarting system calls 4166 } else if (sig == os::Solaris::SIGinterrupt()) { 4167 sigemptyset(&sigAct.sa_mask); 4168 sigAct.sa_handler = NULL; 4169 sigAct.sa_flags = SA_SIGINFO; 4170 sigAct.sa_sigaction = sigINTRHandler; 4171 } else { 4172 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4173 } 4174 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4175 4176 sigaction(sig, &sigAct, &oldAct); 4177 4178 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4179 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4180 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4181} 4182 4183 4184#define DO_SIGNAL_CHECK(sig) \ 4185 if (!sigismember(&check_signal_done, sig)) \ 4186 os::Solaris::check_signal_handler(sig) 4187 4188// This method is a periodic task to check for misbehaving JNI applications 4189// under CheckJNI, we can add any periodic checks here 4190 4191void os::run_periodic_checks() { 4192 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4193 // thereby preventing a NULL checks. 4194 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4195 4196 if (check_signals == false) return; 4197 4198 // SEGV and BUS if overridden could potentially prevent 4199 // generation of hs*.log in the event of a crash, debugging 4200 // such a case can be very challenging, so we absolutely 4201 // check for the following for a good measure: 4202 DO_SIGNAL_CHECK(SIGSEGV); 4203 DO_SIGNAL_CHECK(SIGILL); 4204 DO_SIGNAL_CHECK(SIGFPE); 4205 DO_SIGNAL_CHECK(SIGBUS); 4206 DO_SIGNAL_CHECK(SIGPIPE); 4207 DO_SIGNAL_CHECK(SIGXFSZ); 4208 4209 // ReduceSignalUsage allows the user to override these handlers 4210 // see comments at the very top and jvm_solaris.h 4211 if (!ReduceSignalUsage) { 4212 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4213 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4214 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4215 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4216 } 4217 4218 // See comments above for using JVM1/JVM2 and UseAltSigs 4219 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4220 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4221 4222} 4223 4224typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4225 4226static os_sigaction_t os_sigaction = NULL; 4227 4228void os::Solaris::check_signal_handler(int sig) { 4229 char buf[O_BUFLEN]; 4230 address jvmHandler = NULL; 4231 4232 struct sigaction act; 4233 if (os_sigaction == NULL) { 4234 // only trust the default sigaction, in case it has been interposed 4235 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4236 if (os_sigaction == NULL) return; 4237 } 4238 4239 os_sigaction(sig, (struct sigaction*)NULL, &act); 4240 4241 address thisHandler = (act.sa_flags & SA_SIGINFO) 4242 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4243 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4244 4245 4246 switch(sig) { 4247 case SIGSEGV: 4248 case SIGBUS: 4249 case SIGFPE: 4250 case SIGPIPE: 4251 case SIGXFSZ: 4252 case SIGILL: 4253 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4254 break; 4255 4256 case SHUTDOWN1_SIGNAL: 4257 case SHUTDOWN2_SIGNAL: 4258 case SHUTDOWN3_SIGNAL: 4259 case BREAK_SIGNAL: 4260 jvmHandler = (address)user_handler(); 4261 break; 4262 4263 default: 4264 int intrsig = os::Solaris::SIGinterrupt(); 4265 int asynsig = os::Solaris::SIGasync(); 4266 4267 if (sig == intrsig) { 4268 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4269 } else if (sig == asynsig) { 4270 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4271 } else { 4272 return; 4273 } 4274 break; 4275 } 4276 4277 4278 if (thisHandler != jvmHandler) { 4279 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4280 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4281 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4282 // No need to check this sig any longer 4283 sigaddset(&check_signal_done, sig); 4284 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4285 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4286 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4287 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4288 // No need to check this sig any longer 4289 sigaddset(&check_signal_done, sig); 4290 } 4291 4292 // Print all the signal handler state 4293 if (sigismember(&check_signal_done, sig)) { 4294 print_signal_handlers(tty, buf, O_BUFLEN); 4295 } 4296 4297} 4298 4299void os::Solaris::install_signal_handlers() { 4300 bool libjsigdone = false; 4301 signal_handlers_are_installed = true; 4302 4303 // signal-chaining 4304 typedef void (*signal_setting_t)(); 4305 signal_setting_t begin_signal_setting = NULL; 4306 signal_setting_t end_signal_setting = NULL; 4307 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4308 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4309 if (begin_signal_setting != NULL) { 4310 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4311 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4312 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4313 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4314 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4315 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4316 libjsig_is_loaded = true; 4317 if (os::Solaris::get_libjsig_version != NULL) { 4318 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4319 } 4320 assert(UseSignalChaining, "should enable signal-chaining"); 4321 } 4322 if (libjsig_is_loaded) { 4323 // Tell libjsig jvm is setting signal handlers 4324 (*begin_signal_setting)(); 4325 } 4326 4327 set_signal_handler(SIGSEGV, true, true); 4328 set_signal_handler(SIGPIPE, true, true); 4329 set_signal_handler(SIGXFSZ, true, true); 4330 set_signal_handler(SIGBUS, true, true); 4331 set_signal_handler(SIGILL, true, true); 4332 set_signal_handler(SIGFPE, true, true); 4333 4334 4335 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4336 4337 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4338 // can not register overridable signals which might be > 32 4339 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4340 // Tell libjsig jvm has finished setting signal handlers 4341 (*end_signal_setting)(); 4342 libjsigdone = true; 4343 } 4344 } 4345 4346 // Never ok to chain our SIGinterrupt 4347 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4348 set_signal_handler(os::Solaris::SIGasync(), true, true); 4349 4350 if (libjsig_is_loaded && !libjsigdone) { 4351 // Tell libjsig jvm finishes setting signal handlers 4352 (*end_signal_setting)(); 4353 } 4354 4355 // We don't activate signal checker if libjsig is in place, we trust ourselves 4356 // and if UserSignalHandler is installed all bets are off 4357 if (CheckJNICalls) { 4358 if (libjsig_is_loaded) { 4359 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4360 check_signals = false; 4361 } 4362 if (AllowUserSignalHandlers) { 4363 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4364 check_signals = false; 4365 } 4366 } 4367} 4368 4369 4370void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4371 4372const char * signames[] = { 4373 "SIG0", 4374 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4375 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4376 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4377 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4378 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4379 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4380 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4381 "SIGCANCEL", "SIGLOST" 4382}; 4383 4384const char* os::exception_name(int exception_code, char* buf, size_t size) { 4385 if (0 < exception_code && exception_code <= SIGRTMAX) { 4386 // signal 4387 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4388 jio_snprintf(buf, size, "%s", signames[exception_code]); 4389 } else { 4390 jio_snprintf(buf, size, "SIG%d", exception_code); 4391 } 4392 return buf; 4393 } else { 4394 return NULL; 4395 } 4396} 4397 4398// (Static) wrappers for the new libthread API 4399int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4400int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4401int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4402int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4403int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4404 4405// (Static) wrappers for the liblgrp API 4406os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4407os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4408os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4409os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4410os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4411os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4412os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4413os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4414os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4415 4416// (Static) wrapper for meminfo() call. 4417os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4418 4419static address resolve_symbol(const char *name) { 4420 address addr; 4421 4422 addr = (address) dlsym(RTLD_DEFAULT, name); 4423 if(addr == NULL) { 4424 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4425 addr = (address) dlsym(RTLD_NEXT, name); 4426 if(addr == NULL) { 4427 fatal(dlerror()); 4428 } 4429 } 4430 return addr; 4431} 4432 4433 4434 4435// isT2_libthread() 4436// 4437// Routine to determine if we are currently using the new T2 libthread. 4438// 4439// We determine if we are using T2 by reading /proc/self/lstatus and 4440// looking for a thread with the ASLWP bit set. If we find this status 4441// bit set, we must assume that we are NOT using T2. The T2 team 4442// has approved this algorithm. 4443// 4444// We need to determine if we are running with the new T2 libthread 4445// since setting native thread priorities is handled differently 4446// when using this library. All threads created using T2 are bound 4447// threads. Calling thr_setprio is meaningless in this case. 4448// 4449bool isT2_libthread() { 4450 static prheader_t * lwpArray = NULL; 4451 static int lwpSize = 0; 4452 static int lwpFile = -1; 4453 lwpstatus_t * that; 4454 char lwpName [128]; 4455 bool isT2 = false; 4456 4457#define ADR(x) ((uintptr_t)(x)) 4458#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4459 4460 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4461 if (lwpFile < 0) { 4462 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4463 return false; 4464 } 4465 lwpSize = 16*1024; 4466 for (;;) { 4467 lseek (lwpFile, 0, SEEK_SET); 4468 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4469 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4470 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4471 break; 4472 } 4473 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4474 // We got a good snapshot - now iterate over the list. 4475 int aslwpcount = 0; 4476 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4477 that = LWPINDEX(lwpArray,i); 4478 if (that->pr_flags & PR_ASLWP) { 4479 aslwpcount++; 4480 } 4481 } 4482 if (aslwpcount == 0) isT2 = true; 4483 break; 4484 } 4485 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4486 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4487 } 4488 4489 FREE_C_HEAP_ARRAY(char, lwpArray); 4490 close (lwpFile); 4491 if (ThreadPriorityVerbose) { 4492 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4493 else tty->print_cr("We are not running with a T2 libthread\n"); 4494 } 4495 return isT2; 4496} 4497 4498 4499void os::Solaris::libthread_init() { 4500 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4501 4502 // Determine if we are running with the new T2 libthread 4503 os::Solaris::set_T2_libthread(isT2_libthread()); 4504 4505 lwp_priocntl_init(); 4506 4507 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4508 if(func == NULL) { 4509 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4510 // Guarantee that this VM is running on an new enough OS (5.6 or 4511 // later) that it will have a new enough libthread.so. 4512 guarantee(func != NULL, "libthread.so is too old."); 4513 } 4514 4515 // Initialize the new libthread getstate API wrappers 4516 func = resolve_symbol("thr_getstate"); 4517 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4518 4519 func = resolve_symbol("thr_setstate"); 4520 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4521 4522 func = resolve_symbol("thr_setmutator"); 4523 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4524 4525 func = resolve_symbol("thr_suspend_mutator"); 4526 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4527 4528 func = resolve_symbol("thr_continue_mutator"); 4529 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4530 4531 int size; 4532 void (*handler_info_func)(address *, int *); 4533 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4534 handler_info_func(&handler_start, &size); 4535 handler_end = handler_start + size; 4536} 4537 4538 4539int_fnP_mutex_tP os::Solaris::_mutex_lock; 4540int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4541int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4542int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4543int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4544int os::Solaris::_mutex_scope = USYNC_THREAD; 4545 4546int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4547int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4548int_fnP_cond_tP os::Solaris::_cond_signal; 4549int_fnP_cond_tP os::Solaris::_cond_broadcast; 4550int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4551int_fnP_cond_tP os::Solaris::_cond_destroy; 4552int os::Solaris::_cond_scope = USYNC_THREAD; 4553 4554void os::Solaris::synchronization_init() { 4555 if(UseLWPSynchronization) { 4556 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4557 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4558 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4559 os::Solaris::set_mutex_init(lwp_mutex_init); 4560 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4561 os::Solaris::set_mutex_scope(USYNC_THREAD); 4562 4563 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4564 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4565 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4566 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4567 os::Solaris::set_cond_init(lwp_cond_init); 4568 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4569 os::Solaris::set_cond_scope(USYNC_THREAD); 4570 } 4571 else { 4572 os::Solaris::set_mutex_scope(USYNC_THREAD); 4573 os::Solaris::set_cond_scope(USYNC_THREAD); 4574 4575 if(UsePthreads) { 4576 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4577 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4578 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4579 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4580 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4581 4582 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4583 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4584 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4585 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4586 os::Solaris::set_cond_init(pthread_cond_default_init); 4587 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4588 } 4589 else { 4590 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4591 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4592 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4593 os::Solaris::set_mutex_init(::mutex_init); 4594 os::Solaris::set_mutex_destroy(::mutex_destroy); 4595 4596 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4597 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4598 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4599 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4600 os::Solaris::set_cond_init(::cond_init); 4601 os::Solaris::set_cond_destroy(::cond_destroy); 4602 } 4603 } 4604} 4605 4606void os::Solaris::liblgrp_init() { 4607 void *handle = dlopen("liblgrp.so", RTLD_LAZY); 4608 if (handle != NULL) { 4609 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4610 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4611 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4612 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4613 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4614 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4615 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4616 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4617 dlsym(handle, "lgrp_cookie_stale"))); 4618 4619 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4620 set_lgrp_cookie(c); 4621 } else { 4622 warning("your OS does not support NUMA"); 4623 } 4624} 4625 4626void os::Solaris::misc_sym_init() { 4627 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4628 if(func == NULL) { 4629 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4630 } 4631 if (func != NULL) { 4632 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4633 } 4634} 4635 4636// Symbol doesn't exist in Solaris 8 pset.h 4637#ifndef PS_MYID 4638#define PS_MYID -3 4639#endif 4640 4641// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4642typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4643static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4644 4645void init_pset_getloadavg_ptr(void) { 4646 pset_getloadavg_ptr = 4647 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4648 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4649 warning("pset_getloadavg function not found"); 4650 } 4651} 4652 4653int os::Solaris::_dev_zero_fd = -1; 4654 4655// this is called _before_ the global arguments have been parsed 4656void os::init(void) { 4657 _initial_pid = getpid(); 4658 4659 max_hrtime = first_hrtime = gethrtime(); 4660 4661 init_random(1234567); 4662 4663 page_size = sysconf(_SC_PAGESIZE); 4664 if (page_size == -1) 4665 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4666 init_page_sizes((size_t) page_size); 4667 4668 Solaris::initialize_system_info(); 4669 4670 int fd = open("/dev/zero", O_RDWR); 4671 if (fd < 0) { 4672 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4673 } else { 4674 Solaris::set_dev_zero_fd(fd); 4675 4676 // Close on exec, child won't inherit. 4677 fcntl(fd, F_SETFD, FD_CLOEXEC); 4678 } 4679 4680 clock_tics_per_sec = CLK_TCK; 4681 4682 // check if dladdr1() exists; dladdr1 can provide more information than 4683 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4684 // and is available on linker patches for 5.7 and 5.8. 4685 // libdl.so must have been loaded, this call is just an entry lookup 4686 void * hdl = dlopen("libdl.so", RTLD_NOW); 4687 if (hdl) 4688 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4689 4690 // (Solaris only) this switches to calls that actually do locking. 4691 ThreadCritical::initialize(); 4692 4693 main_thread = thr_self(); 4694 4695 // Constant minimum stack size allowed. It must be at least 4696 // the minimum of what the OS supports (thr_min_stack()), and 4697 // enough to allow the thread to get to user bytecode execution. 4698 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4699 // If the pagesize of the VM is greater than 8K determine the appropriate 4700 // number of initial guard pages. The user can change this with the 4701 // command line arguments, if needed. 4702 if (vm_page_size() > 8*K) { 4703 StackYellowPages = 1; 4704 StackRedPages = 1; 4705 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4706 } 4707} 4708 4709// To install functions for atexit system call 4710extern "C" { 4711 static void perfMemory_exit_helper() { 4712 perfMemory_exit(); 4713 } 4714} 4715 4716// this is called _after_ the global arguments have been parsed 4717jint os::init_2(void) { 4718 // try to enable extended file IO ASAP, see 6431278 4719 os::Solaris::try_enable_extended_io(); 4720 4721 // Allocate a single page and mark it as readable for safepoint polling. Also 4722 // use this first mmap call to check support for MAP_ALIGN. 4723 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4724 page_size, 4725 MAP_PRIVATE | MAP_ALIGN, 4726 PROT_READ); 4727 if (polling_page == NULL) { 4728 has_map_align = false; 4729 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4730 PROT_READ); 4731 } 4732 4733 os::set_polling_page(polling_page); 4734 4735#ifndef PRODUCT 4736 if( Verbose && PrintMiscellaneous ) 4737 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4738#endif 4739 4740 if (!UseMembar) { 4741 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4742 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4743 os::set_memory_serialize_page( mem_serialize_page ); 4744 4745#ifndef PRODUCT 4746 if(Verbose && PrintMiscellaneous) 4747 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4748#endif 4749} 4750 4751 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4752 4753 // Check minimum allowable stack size for thread creation and to initialize 4754 // the java system classes, including StackOverflowError - depends on page 4755 // size. Add a page for compiler2 recursion in main thread. 4756 // Add in BytesPerWord times page size to account for VM stack during 4757 // class initialization depending on 32 or 64 bit VM. 4758 guarantee((Solaris::min_stack_allowed >= 4759 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4760 COMPILER2_PRESENT(+1)) * page_size), 4761 "need to increase Solaris::min_stack_allowed on this platform"); 4762 4763 size_t threadStackSizeInBytes = ThreadStackSize * K; 4764 if (threadStackSizeInBytes != 0 && 4765 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4766 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4767 Solaris::min_stack_allowed/K); 4768 return JNI_ERR; 4769 } 4770 4771 // For 64kbps there will be a 64kb page size, which makes 4772 // the usable default stack size quite a bit less. Increase the 4773 // stack for 64kb (or any > than 8kb) pages, this increases 4774 // virtual memory fragmentation (since we're not creating the 4775 // stack on a power of 2 boundary. The real fix for this 4776 // should be to fix the guard page mechanism. 4777 4778 if (vm_page_size() > 8*K) { 4779 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4780 ? threadStackSizeInBytes + 4781 ((StackYellowPages + StackRedPages) * vm_page_size()) 4782 : 0; 4783 ThreadStackSize = threadStackSizeInBytes/K; 4784 } 4785 4786 // Make the stack size a multiple of the page size so that 4787 // the yellow/red zones can be guarded. 4788 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4789 vm_page_size())); 4790 4791 Solaris::libthread_init(); 4792 if (UseNUMA) { 4793 Solaris::liblgrp_init(); 4794 } 4795 Solaris::misc_sym_init(); 4796 Solaris::signal_sets_init(); 4797 Solaris::init_signal_mem(); 4798 Solaris::install_signal_handlers(); 4799 4800 if (libjsigversion < JSIG_VERSION_1_4_1) { 4801 Maxlibjsigsigs = OLDMAXSIGNUM; 4802 } 4803 4804 // initialize synchronization primitives to use either thread or 4805 // lwp synchronization (controlled by UseLWPSynchronization) 4806 Solaris::synchronization_init(); 4807 4808 if (MaxFDLimit) { 4809 // set the number of file descriptors to max. print out error 4810 // if getrlimit/setrlimit fails but continue regardless. 4811 struct rlimit nbr_files; 4812 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4813 if (status != 0) { 4814 if (PrintMiscellaneous && (Verbose || WizardMode)) 4815 perror("os::init_2 getrlimit failed"); 4816 } else { 4817 nbr_files.rlim_cur = nbr_files.rlim_max; 4818 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4819 if (status != 0) { 4820 if (PrintMiscellaneous && (Verbose || WizardMode)) 4821 perror("os::init_2 setrlimit failed"); 4822 } 4823 } 4824 } 4825 4826 // Initialize HPI. 4827 jint hpi_result = hpi::initialize(); 4828 if (hpi_result != JNI_OK) { 4829 tty->print_cr("There was an error trying to initialize the HPI library."); 4830 return hpi_result; 4831 } 4832 4833 // Calculate theoretical max. size of Threads to guard gainst 4834 // artifical out-of-memory situations, where all available address- 4835 // space has been reserved by thread stacks. Default stack size is 1Mb. 4836 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4837 JavaThread::stack_size_at_create() : (1*K*K); 4838 assert(pre_thread_stack_size != 0, "Must have a stack"); 4839 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4840 // we should start doing Virtual Memory banging. Currently when the threads will 4841 // have used all but 200Mb of space. 4842 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4843 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4844 4845 // at-exit methods are called in the reverse order of their registration. 4846 // In Solaris 7 and earlier, atexit functions are called on return from 4847 // main or as a result of a call to exit(3C). There can be only 32 of 4848 // these functions registered and atexit() does not set errno. In Solaris 4849 // 8 and later, there is no limit to the number of functions registered 4850 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4851 // functions are called upon dlclose(3DL) in addition to return from main 4852 // and exit(3C). 4853 4854 if (PerfAllowAtExitRegistration) { 4855 // only register atexit functions if PerfAllowAtExitRegistration is set. 4856 // atexit functions can be delayed until process exit time, which 4857 // can be problematic for embedded VM situations. Embedded VMs should 4858 // call DestroyJavaVM() to assure that VM resources are released. 4859 4860 // note: perfMemory_exit_helper atexit function may be removed in 4861 // the future if the appropriate cleanup code can be added to the 4862 // VM_Exit VMOperation's doit method. 4863 if (atexit(perfMemory_exit_helper) != 0) { 4864 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4865 } 4866 } 4867 4868 // Init pset_loadavg function pointer 4869 init_pset_getloadavg_ptr(); 4870 4871 return JNI_OK; 4872} 4873 4874 4875// Mark the polling page as unreadable 4876void os::make_polling_page_unreadable(void) { 4877 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4878 fatal("Could not disable polling page"); 4879}; 4880 4881// Mark the polling page as readable 4882void os::make_polling_page_readable(void) { 4883 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4884 fatal("Could not enable polling page"); 4885}; 4886 4887// OS interface. 4888 4889int os::stat(const char *path, struct stat *sbuf) { 4890 char pathbuf[MAX_PATH]; 4891 if (strlen(path) > MAX_PATH - 1) { 4892 errno = ENAMETOOLONG; 4893 return -1; 4894 } 4895 hpi::native_path(strcpy(pathbuf, path)); 4896 return ::stat(pathbuf, sbuf); 4897} 4898 4899 4900bool os::check_heap(bool force) { return true; } 4901 4902typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4903static vsnprintf_t sol_vsnprintf = NULL; 4904 4905int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4906 if (!sol_vsnprintf) { 4907 //search for the named symbol in the objects that were loaded after libjvm 4908 void* where = RTLD_NEXT; 4909 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4910 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4911 if (!sol_vsnprintf){ 4912 //search for the named symbol in the objects that were loaded before libjvm 4913 where = RTLD_DEFAULT; 4914 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4915 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4916 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4917 } 4918 } 4919 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4920} 4921 4922 4923// Is a (classpath) directory empty? 4924bool os::dir_is_empty(const char* path) { 4925 DIR *dir = NULL; 4926 struct dirent *ptr; 4927 4928 dir = opendir(path); 4929 if (dir == NULL) return true; 4930 4931 /* Scan the directory */ 4932 bool result = true; 4933 char buf[sizeof(struct dirent) + MAX_PATH]; 4934 struct dirent *dbuf = (struct dirent *) buf; 4935 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4936 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4937 result = false; 4938 } 4939 } 4940 closedir(dir); 4941 return result; 4942} 4943 4944// create binary file, rewriting existing file if required 4945int os::create_binary_file(const char* path, bool rewrite_existing) { 4946 int oflags = O_WRONLY | O_CREAT; 4947 if (!rewrite_existing) { 4948 oflags |= O_EXCL; 4949 } 4950 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4951} 4952 4953// return current position of file pointer 4954jlong os::current_file_offset(int fd) { 4955 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4956} 4957 4958// move file pointer to the specified offset 4959jlong os::seek_to_file_offset(int fd, jlong offset) { 4960 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4961} 4962 4963// Map a block of memory. 4964char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4965 char *addr, size_t bytes, bool read_only, 4966 bool allow_exec) { 4967 int prot; 4968 int flags; 4969 4970 if (read_only) { 4971 prot = PROT_READ; 4972 flags = MAP_SHARED; 4973 } else { 4974 prot = PROT_READ | PROT_WRITE; 4975 flags = MAP_PRIVATE; 4976 } 4977 4978 if (allow_exec) { 4979 prot |= PROT_EXEC; 4980 } 4981 4982 if (addr != NULL) { 4983 flags |= MAP_FIXED; 4984 } 4985 4986 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4987 fd, file_offset); 4988 if (mapped_address == MAP_FAILED) { 4989 return NULL; 4990 } 4991 return mapped_address; 4992} 4993 4994 4995// Remap a block of memory. 4996char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4997 char *addr, size_t bytes, bool read_only, 4998 bool allow_exec) { 4999 // same as map_memory() on this OS 5000 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5001 allow_exec); 5002} 5003 5004 5005// Unmap a block of memory. 5006bool os::unmap_memory(char* addr, size_t bytes) { 5007 return munmap(addr, bytes) == 0; 5008} 5009 5010void os::pause() { 5011 char filename[MAX_PATH]; 5012 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5013 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5014 } else { 5015 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5016 } 5017 5018 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5019 if (fd != -1) { 5020 struct stat buf; 5021 close(fd); 5022 while (::stat(filename, &buf) == 0) { 5023 (void)::poll(NULL, 0, 100); 5024 } 5025 } else { 5026 jio_fprintf(stderr, 5027 "Could not open pause file '%s', continuing immediately.\n", filename); 5028 } 5029} 5030 5031#ifndef PRODUCT 5032#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5033// Turn this on if you need to trace synch operations. 5034// Set RECORD_SYNCH_LIMIT to a large-enough value, 5035// and call record_synch_enable and record_synch_disable 5036// around the computation of interest. 5037 5038void record_synch(char* name, bool returning); // defined below 5039 5040class RecordSynch { 5041 char* _name; 5042 public: 5043 RecordSynch(char* name) :_name(name) 5044 { record_synch(_name, false); } 5045 ~RecordSynch() { record_synch(_name, true); } 5046}; 5047 5048#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5049extern "C" ret name params { \ 5050 typedef ret name##_t params; \ 5051 static name##_t* implem = NULL; \ 5052 static int callcount = 0; \ 5053 if (implem == NULL) { \ 5054 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5055 if (implem == NULL) fatal(dlerror()); \ 5056 } \ 5057 ++callcount; \ 5058 RecordSynch _rs(#name); \ 5059 inner; \ 5060 return implem args; \ 5061} 5062// in dbx, examine callcounts this way: 5063// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5064 5065#define CHECK_POINTER_OK(p) \ 5066 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5067#define CHECK_MU \ 5068 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5069#define CHECK_CV \ 5070 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5071#define CHECK_P(p) \ 5072 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5073 5074#define CHECK_MUTEX(mutex_op) \ 5075CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5076 5077CHECK_MUTEX( mutex_lock) 5078CHECK_MUTEX( _mutex_lock) 5079CHECK_MUTEX( mutex_unlock) 5080CHECK_MUTEX(_mutex_unlock) 5081CHECK_MUTEX( mutex_trylock) 5082CHECK_MUTEX(_mutex_trylock) 5083 5084#define CHECK_COND(cond_op) \ 5085CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5086 5087CHECK_COND( cond_wait); 5088CHECK_COND(_cond_wait); 5089CHECK_COND(_cond_wait_cancel); 5090 5091#define CHECK_COND2(cond_op) \ 5092CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5093 5094CHECK_COND2( cond_timedwait); 5095CHECK_COND2(_cond_timedwait); 5096CHECK_COND2(_cond_timedwait_cancel); 5097 5098// do the _lwp_* versions too 5099#define mutex_t lwp_mutex_t 5100#define cond_t lwp_cond_t 5101CHECK_MUTEX( _lwp_mutex_lock) 5102CHECK_MUTEX( _lwp_mutex_unlock) 5103CHECK_MUTEX( _lwp_mutex_trylock) 5104CHECK_MUTEX( __lwp_mutex_lock) 5105CHECK_MUTEX( __lwp_mutex_unlock) 5106CHECK_MUTEX( __lwp_mutex_trylock) 5107CHECK_MUTEX(___lwp_mutex_lock) 5108CHECK_MUTEX(___lwp_mutex_unlock) 5109 5110CHECK_COND( _lwp_cond_wait); 5111CHECK_COND( __lwp_cond_wait); 5112CHECK_COND(___lwp_cond_wait); 5113 5114CHECK_COND2( _lwp_cond_timedwait); 5115CHECK_COND2( __lwp_cond_timedwait); 5116#undef mutex_t 5117#undef cond_t 5118 5119CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5120CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5121CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5122CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5123CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5124CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5125CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5126CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5127 5128 5129// recording machinery: 5130 5131enum { RECORD_SYNCH_LIMIT = 200 }; 5132char* record_synch_name[RECORD_SYNCH_LIMIT]; 5133void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5134bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5135thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5136int record_synch_count = 0; 5137bool record_synch_enabled = false; 5138 5139// in dbx, examine recorded data this way: 5140// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5141 5142void record_synch(char* name, bool returning) { 5143 if (record_synch_enabled) { 5144 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5145 record_synch_name[record_synch_count] = name; 5146 record_synch_returning[record_synch_count] = returning; 5147 record_synch_thread[record_synch_count] = thr_self(); 5148 record_synch_arg0ptr[record_synch_count] = &name; 5149 record_synch_count++; 5150 } 5151 // put more checking code here: 5152 // ... 5153 } 5154} 5155 5156void record_synch_enable() { 5157 // start collecting trace data, if not already doing so 5158 if (!record_synch_enabled) record_synch_count = 0; 5159 record_synch_enabled = true; 5160} 5161 5162void record_synch_disable() { 5163 // stop collecting trace data 5164 record_synch_enabled = false; 5165} 5166 5167#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5168#endif // PRODUCT 5169 5170const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5171const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5172 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5173 5174 5175// JVMTI & JVM monitoring and management support 5176// The thread_cpu_time() and current_thread_cpu_time() are only 5177// supported if is_thread_cpu_time_supported() returns true. 5178// They are not supported on Solaris T1. 5179 5180// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5181// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5182// of a thread. 5183// 5184// current_thread_cpu_time() and thread_cpu_time(Thread *) 5185// returns the fast estimate available on the platform. 5186 5187// hrtime_t gethrvtime() return value includes 5188// user time but does not include system time 5189jlong os::current_thread_cpu_time() { 5190 return (jlong) gethrvtime(); 5191} 5192 5193jlong os::thread_cpu_time(Thread *thread) { 5194 // return user level CPU time only to be consistent with 5195 // what current_thread_cpu_time returns. 5196 // thread_cpu_time_info() must be changed if this changes 5197 return os::thread_cpu_time(thread, false /* user time only */); 5198} 5199 5200jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5201 if (user_sys_cpu_time) { 5202 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5203 } else { 5204 return os::current_thread_cpu_time(); 5205 } 5206} 5207 5208jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5209 char proc_name[64]; 5210 int count; 5211 prusage_t prusage; 5212 jlong lwp_time; 5213 int fd; 5214 5215 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5216 getpid(), 5217 thread->osthread()->lwp_id()); 5218 fd = open(proc_name, O_RDONLY); 5219 if ( fd == -1 ) return -1; 5220 5221 do { 5222 count = pread(fd, 5223 (void *)&prusage.pr_utime, 5224 thr_time_size, 5225 thr_time_off); 5226 } while (count < 0 && errno == EINTR); 5227 close(fd); 5228 if ( count < 0 ) return -1; 5229 5230 if (user_sys_cpu_time) { 5231 // user + system CPU time 5232 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5233 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5234 (jlong)prusage.pr_stime.tv_nsec + 5235 (jlong)prusage.pr_utime.tv_nsec; 5236 } else { 5237 // user level CPU time only 5238 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5239 (jlong)prusage.pr_utime.tv_nsec; 5240 } 5241 5242 return(lwp_time); 5243} 5244 5245void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5246 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5247 info_ptr->may_skip_backward = false; // elapsed time not wall time 5248 info_ptr->may_skip_forward = false; // elapsed time not wall time 5249 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5250} 5251 5252void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5253 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5254 info_ptr->may_skip_backward = false; // elapsed time not wall time 5255 info_ptr->may_skip_forward = false; // elapsed time not wall time 5256 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5257} 5258 5259bool os::is_thread_cpu_time_supported() { 5260 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5261 return true; 5262 } else { 5263 return false; 5264 } 5265} 5266 5267// System loadavg support. Returns -1 if load average cannot be obtained. 5268// Return the load average for our processor set if the primitive exists 5269// (Solaris 9 and later). Otherwise just return system wide loadavg. 5270int os::loadavg(double loadavg[], int nelem) { 5271 if (pset_getloadavg_ptr != NULL) { 5272 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5273 } else { 5274 return ::getloadavg(loadavg, nelem); 5275 } 5276} 5277 5278//--------------------------------------------------------------------------------- 5279#ifndef PRODUCT 5280 5281static address same_page(address x, address y) { 5282 intptr_t page_bits = -os::vm_page_size(); 5283 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5284 return x; 5285 else if (x > y) 5286 return (address)(intptr_t(y) | ~page_bits) + 1; 5287 else 5288 return (address)(intptr_t(y) & page_bits); 5289} 5290 5291bool os::find(address addr) { 5292 Dl_info dlinfo; 5293 memset(&dlinfo, 0, sizeof(dlinfo)); 5294 if (dladdr(addr, &dlinfo)) { 5295#ifdef _LP64 5296 tty->print("0x%016lx: ", addr); 5297#else 5298 tty->print("0x%08x: ", addr); 5299#endif 5300 if (dlinfo.dli_sname != NULL) 5301 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5302 else if (dlinfo.dli_fname) 5303 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5304 else 5305 tty->print("<absolute address>"); 5306 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5307#ifdef _LP64 5308 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5309#else 5310 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5311#endif 5312 tty->cr(); 5313 5314 if (Verbose) { 5315 // decode some bytes around the PC 5316 address begin = same_page(addr-40, addr); 5317 address end = same_page(addr+40, addr); 5318 address lowest = (address) dlinfo.dli_sname; 5319 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5320 if (begin < lowest) begin = lowest; 5321 Dl_info dlinfo2; 5322 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5323 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5324 end = (address) dlinfo2.dli_saddr; 5325 Disassembler::decode(begin, end); 5326 } 5327 return true; 5328 } 5329 return false; 5330} 5331 5332#endif 5333 5334 5335// Following function has been added to support HotSparc's libjvm.so running 5336// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5337// src/solaris/hpi/native_threads in the EVM codebase. 5338// 5339// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5340// libraries and should thus be removed. We will leave it behind for a while 5341// until we no longer want to able to run on top of 1.3.0 Solaris production 5342// JDK. See 4341971. 5343 5344#define STACK_SLACK 0x800 5345 5346extern "C" { 5347 intptr_t sysThreadAvailableStackWithSlack() { 5348 stack_t st; 5349 intptr_t retval, stack_top; 5350 retval = thr_stksegment(&st); 5351 assert(retval == 0, "incorrect return value from thr_stksegment"); 5352 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5353 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5354 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5355 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5356 } 5357} 5358 5359// Just to get the Kernel build to link on solaris for testing. 5360 5361extern "C" { 5362class ASGCT_CallTrace; 5363void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5364 KERNEL_RETURN; 5365} 5366 5367 5368// ObjectMonitor park-unpark infrastructure ... 5369// 5370// We implement Solaris and Linux PlatformEvents with the 5371// obvious condvar-mutex-flag triple. 5372// Another alternative that works quite well is pipes: 5373// Each PlatformEvent consists of a pipe-pair. 5374// The thread associated with the PlatformEvent 5375// calls park(), which reads from the input end of the pipe. 5376// Unpark() writes into the other end of the pipe. 5377// The write-side of the pipe must be set NDELAY. 5378// Unfortunately pipes consume a large # of handles. 5379// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5380// Using pipes for the 1st few threads might be workable, however. 5381// 5382// park() is permitted to return spuriously. 5383// Callers of park() should wrap the call to park() in 5384// an appropriate loop. A litmus test for the correct 5385// usage of park is the following: if park() were modified 5386// to immediately return 0 your code should still work, 5387// albeit degenerating to a spin loop. 5388// 5389// An interesting optimization for park() is to use a trylock() 5390// to attempt to acquire the mutex. If the trylock() fails 5391// then we know that a concurrent unpark() operation is in-progress. 5392// in that case the park() code could simply set _count to 0 5393// and return immediately. The subsequent park() operation *might* 5394// return immediately. That's harmless as the caller of park() is 5395// expected to loop. By using trylock() we will have avoided a 5396// avoided a context switch caused by contention on the per-thread mutex. 5397// 5398// TODO-FIXME: 5399// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5400// objectmonitor implementation. 5401// 2. Collapse the JSR166 parker event, and the 5402// objectmonitor ParkEvent into a single "Event" construct. 5403// 3. In park() and unpark() add: 5404// assert (Thread::current() == AssociatedWith). 5405// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5406// 1-out-of-N park() operations will return immediately. 5407// 5408// _Event transitions in park() 5409// -1 => -1 : illegal 5410// 1 => 0 : pass - return immediately 5411// 0 => -1 : block 5412// 5413// _Event serves as a restricted-range semaphore. 5414// 5415// Another possible encoding of _Event would be with 5416// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5417// 5418// TODO-FIXME: add DTRACE probes for: 5419// 1. Tx parks 5420// 2. Ty unparks Tx 5421// 3. Tx resumes from park 5422 5423 5424// value determined through experimentation 5425#define ROUNDINGFIX 11 5426 5427// utility to compute the abstime argument to timedwait. 5428// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5429 5430static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5431 // millis is the relative timeout time 5432 // abstime will be the absolute timeout time 5433 if (millis < 0) millis = 0; 5434 struct timeval now; 5435 int status = gettimeofday(&now, NULL); 5436 assert(status == 0, "gettimeofday"); 5437 jlong seconds = millis / 1000; 5438 jlong max_wait_period; 5439 5440 if (UseLWPSynchronization) { 5441 // forward port of fix for 4275818 (not sleeping long enough) 5442 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5443 // _lwp_cond_timedwait() used a round_down algorithm rather 5444 // than a round_up. For millis less than our roundfactor 5445 // it rounded down to 0 which doesn't meet the spec. 5446 // For millis > roundfactor we may return a bit sooner, but 5447 // since we can not accurately identify the patch level and 5448 // this has already been fixed in Solaris 9 and 8 we will 5449 // leave it alone rather than always rounding down. 5450 5451 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5452 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5453 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5454 max_wait_period = 21000000; 5455 } else { 5456 max_wait_period = 50000000; 5457 } 5458 millis %= 1000; 5459 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5460 seconds = max_wait_period; 5461 } 5462 abstime->tv_sec = now.tv_sec + seconds; 5463 long usec = now.tv_usec + millis * 1000; 5464 if (usec >= 1000000) { 5465 abstime->tv_sec += 1; 5466 usec -= 1000000; 5467 } 5468 abstime->tv_nsec = usec * 1000; 5469 return abstime; 5470} 5471 5472// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5473// Conceptually TryPark() should be equivalent to park(0). 5474 5475int os::PlatformEvent::TryPark() { 5476 for (;;) { 5477 const int v = _Event ; 5478 guarantee ((v == 0) || (v == 1), "invariant") ; 5479 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5480 } 5481} 5482 5483void os::PlatformEvent::park() { // AKA: down() 5484 // Invariant: Only the thread associated with the Event/PlatformEvent 5485 // may call park(). 5486 int v ; 5487 for (;;) { 5488 v = _Event ; 5489 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5490 } 5491 guarantee (v >= 0, "invariant") ; 5492 if (v == 0) { 5493 // Do this the hard way by blocking ... 5494 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5495 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5496 // Only for SPARC >= V8PlusA 5497#if defined(__sparc) && defined(COMPILER2) 5498 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5499#endif 5500 int status = os::Solaris::mutex_lock(_mutex); 5501 assert_status(status == 0, status, "mutex_lock"); 5502 guarantee (_nParked == 0, "invariant") ; 5503 ++ _nParked ; 5504 while (_Event < 0) { 5505 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5506 // Treat this the same as if the wait was interrupted 5507 // With usr/lib/lwp going to kernel, always handle ETIME 5508 status = os::Solaris::cond_wait(_cond, _mutex); 5509 if (status == ETIME) status = EINTR ; 5510 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5511 } 5512 -- _nParked ; 5513 _Event = 0 ; 5514 status = os::Solaris::mutex_unlock(_mutex); 5515 assert_status(status == 0, status, "mutex_unlock"); 5516 } 5517} 5518 5519int os::PlatformEvent::park(jlong millis) { 5520 guarantee (_nParked == 0, "invariant") ; 5521 int v ; 5522 for (;;) { 5523 v = _Event ; 5524 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5525 } 5526 guarantee (v >= 0, "invariant") ; 5527 if (v != 0) return OS_OK ; 5528 5529 int ret = OS_TIMEOUT; 5530 timestruc_t abst; 5531 compute_abstime (&abst, millis); 5532 5533 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5534 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5535 // Only for SPARC >= V8PlusA 5536#if defined(__sparc) && defined(COMPILER2) 5537 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5538#endif 5539 int status = os::Solaris::mutex_lock(_mutex); 5540 assert_status(status == 0, status, "mutex_lock"); 5541 guarantee (_nParked == 0, "invariant") ; 5542 ++ _nParked ; 5543 while (_Event < 0) { 5544 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5545 assert_status(status == 0 || status == EINTR || 5546 status == ETIME || status == ETIMEDOUT, 5547 status, "cond_timedwait"); 5548 if (!FilterSpuriousWakeups) break ; // previous semantics 5549 if (status == ETIME || status == ETIMEDOUT) break ; 5550 // We consume and ignore EINTR and spurious wakeups. 5551 } 5552 -- _nParked ; 5553 if (_Event >= 0) ret = OS_OK ; 5554 _Event = 0 ; 5555 status = os::Solaris::mutex_unlock(_mutex); 5556 assert_status(status == 0, status, "mutex_unlock"); 5557 return ret; 5558} 5559 5560void os::PlatformEvent::unpark() { 5561 int v, AnyWaiters; 5562 5563 // Increment _Event. 5564 // Another acceptable implementation would be to simply swap 1 5565 // into _Event: 5566 // if (Swap (&_Event, 1) < 0) { 5567 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5568 // if (AnyWaiters) cond_signal (_cond) ; 5569 // } 5570 5571 for (;;) { 5572 v = _Event ; 5573 if (v > 0) { 5574 // The LD of _Event could have reordered or be satisfied 5575 // by a read-aside from this processor's write buffer. 5576 // To avoid problems execute a barrier and then 5577 // ratify the value. A degenerate CAS() would also work. 5578 // Viz., CAS (v+0, &_Event, v) == v). 5579 OrderAccess::fence() ; 5580 if (_Event == v) return ; 5581 continue ; 5582 } 5583 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5584 } 5585 5586 // If the thread associated with the event was parked, wake it. 5587 if (v < 0) { 5588 int status ; 5589 // Wait for the thread assoc with the PlatformEvent to vacate. 5590 status = os::Solaris::mutex_lock(_mutex); 5591 assert_status(status == 0, status, "mutex_lock"); 5592 AnyWaiters = _nParked ; 5593 status = os::Solaris::mutex_unlock(_mutex); 5594 assert_status(status == 0, status, "mutex_unlock"); 5595 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5596 if (AnyWaiters != 0) { 5597 // We intentional signal *after* dropping the lock 5598 // to avoid a common class of futile wakeups. 5599 status = os::Solaris::cond_signal(_cond); 5600 assert_status(status == 0, status, "cond_signal"); 5601 } 5602 } 5603} 5604 5605// JSR166 5606// ------------------------------------------------------- 5607 5608/* 5609 * The solaris and linux implementations of park/unpark are fairly 5610 * conservative for now, but can be improved. They currently use a 5611 * mutex/condvar pair, plus _counter. 5612 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5613 * sets count to 1 and signals condvar. Only one thread ever waits 5614 * on the condvar. Contention seen when trying to park implies that someone 5615 * is unparking you, so don't wait. And spurious returns are fine, so there 5616 * is no need to track notifications. 5617 */ 5618 5619#define NANOSECS_PER_SEC 1000000000 5620#define NANOSECS_PER_MILLISEC 1000000 5621#define MAX_SECS 100000000 5622 5623/* 5624 * This code is common to linux and solaris and will be moved to a 5625 * common place in dolphin. 5626 * 5627 * The passed in time value is either a relative time in nanoseconds 5628 * or an absolute time in milliseconds. Either way it has to be unpacked 5629 * into suitable seconds and nanoseconds components and stored in the 5630 * given timespec structure. 5631 * Given time is a 64-bit value and the time_t used in the timespec is only 5632 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5633 * overflow if times way in the future are given. Further on Solaris versions 5634 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5635 * number of seconds, in abstime, is less than current_time + 100,000,000. 5636 * As it will be 28 years before "now + 100000000" will overflow we can 5637 * ignore overflow and just impose a hard-limit on seconds using the value 5638 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5639 * years from "now". 5640 */ 5641static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5642 assert (time > 0, "convertTime"); 5643 5644 struct timeval now; 5645 int status = gettimeofday(&now, NULL); 5646 assert(status == 0, "gettimeofday"); 5647 5648 time_t max_secs = now.tv_sec + MAX_SECS; 5649 5650 if (isAbsolute) { 5651 jlong secs = time / 1000; 5652 if (secs > max_secs) { 5653 absTime->tv_sec = max_secs; 5654 } 5655 else { 5656 absTime->tv_sec = secs; 5657 } 5658 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5659 } 5660 else { 5661 jlong secs = time / NANOSECS_PER_SEC; 5662 if (secs >= MAX_SECS) { 5663 absTime->tv_sec = max_secs; 5664 absTime->tv_nsec = 0; 5665 } 5666 else { 5667 absTime->tv_sec = now.tv_sec + secs; 5668 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5669 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5670 absTime->tv_nsec -= NANOSECS_PER_SEC; 5671 ++absTime->tv_sec; // note: this must be <= max_secs 5672 } 5673 } 5674 } 5675 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5676 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5677 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5678 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5679} 5680 5681void Parker::park(bool isAbsolute, jlong time) { 5682 5683 // Optional fast-path check: 5684 // Return immediately if a permit is available. 5685 if (_counter > 0) { 5686 _counter = 0 ; 5687 return ; 5688 } 5689 5690 // Optional fast-exit: Check interrupt before trying to wait 5691 Thread* thread = Thread::current(); 5692 assert(thread->is_Java_thread(), "Must be JavaThread"); 5693 JavaThread *jt = (JavaThread *)thread; 5694 if (Thread::is_interrupted(thread, false)) { 5695 return; 5696 } 5697 5698 // First, demultiplex/decode time arguments 5699 timespec absTime; 5700 if (time < 0) { // don't wait at all 5701 return; 5702 } 5703 if (time > 0) { 5704 // Warning: this code might be exposed to the old Solaris time 5705 // round-down bugs. Grep "roundingFix" for details. 5706 unpackTime(&absTime, isAbsolute, time); 5707 } 5708 5709 // Enter safepoint region 5710 // Beware of deadlocks such as 6317397. 5711 // The per-thread Parker:: _mutex is a classic leaf-lock. 5712 // In particular a thread must never block on the Threads_lock while 5713 // holding the Parker:: mutex. If safepoints are pending both the 5714 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5715 ThreadBlockInVM tbivm(jt); 5716 5717 // Don't wait if cannot get lock since interference arises from 5718 // unblocking. Also. check interrupt before trying wait 5719 if (Thread::is_interrupted(thread, false) || 5720 os::Solaris::mutex_trylock(_mutex) != 0) { 5721 return; 5722 } 5723 5724 int status ; 5725 5726 if (_counter > 0) { // no wait needed 5727 _counter = 0; 5728 status = os::Solaris::mutex_unlock(_mutex); 5729 assert (status == 0, "invariant") ; 5730 return; 5731 } 5732 5733#ifdef ASSERT 5734 // Don't catch signals while blocked; let the running threads have the signals. 5735 // (This allows a debugger to break into the running thread.) 5736 sigset_t oldsigs; 5737 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5738 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5739#endif 5740 5741 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5742 jt->set_suspend_equivalent(); 5743 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5744 5745 // Do this the hard way by blocking ... 5746 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5747 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5748 // Only for SPARC >= V8PlusA 5749#if defined(__sparc) && defined(COMPILER2) 5750 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5751#endif 5752 5753 if (time == 0) { 5754 status = os::Solaris::cond_wait (_cond, _mutex) ; 5755 } else { 5756 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5757 } 5758 // Note that an untimed cond_wait() can sometimes return ETIME on older 5759 // versions of the Solaris. 5760 assert_status(status == 0 || status == EINTR || 5761 status == ETIME || status == ETIMEDOUT, 5762 status, "cond_timedwait"); 5763 5764#ifdef ASSERT 5765 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5766#endif 5767 _counter = 0 ; 5768 status = os::Solaris::mutex_unlock(_mutex); 5769 assert_status(status == 0, status, "mutex_unlock") ; 5770 5771 // If externally suspended while waiting, re-suspend 5772 if (jt->handle_special_suspend_equivalent_condition()) { 5773 jt->java_suspend_self(); 5774 } 5775 5776} 5777 5778void Parker::unpark() { 5779 int s, status ; 5780 status = os::Solaris::mutex_lock (_mutex) ; 5781 assert (status == 0, "invariant") ; 5782 s = _counter; 5783 _counter = 1; 5784 status = os::Solaris::mutex_unlock (_mutex) ; 5785 assert (status == 0, "invariant") ; 5786 5787 if (s < 1) { 5788 status = os::Solaris::cond_signal (_cond) ; 5789 assert (status == 0, "invariant") ; 5790 } 5791} 5792 5793extern char** environ; 5794 5795// Run the specified command in a separate process. Return its exit value, 5796// or -1 on failure (e.g. can't fork a new process). 5797// Unlike system(), this function can be called from signal handler. It 5798// doesn't block SIGINT et al. 5799int os::fork_and_exec(char* cmd) { 5800 char * argv[4]; 5801 argv[0] = (char *)"sh"; 5802 argv[1] = (char *)"-c"; 5803 argv[2] = cmd; 5804 argv[3] = NULL; 5805 5806 // fork is async-safe, fork1 is not so can't use in signal handler 5807 pid_t pid; 5808 Thread* t = ThreadLocalStorage::get_thread_slow(); 5809 if (t != NULL && t->is_inside_signal_handler()) { 5810 pid = fork(); 5811 } else { 5812 pid = fork1(); 5813 } 5814 5815 if (pid < 0) { 5816 // fork failed 5817 warning("fork failed: %s", strerror(errno)); 5818 return -1; 5819 5820 } else if (pid == 0) { 5821 // child process 5822 5823 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5824 execve("/usr/bin/sh", argv, environ); 5825 5826 // execve failed 5827 _exit(-1); 5828 5829 } else { 5830 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5831 // care about the actual exit code, for now. 5832 5833 int status; 5834 5835 // Wait for the child process to exit. This returns immediately if 5836 // the child has already exited. */ 5837 while (waitpid(pid, &status, 0) < 0) { 5838 switch (errno) { 5839 case ECHILD: return 0; 5840 case EINTR: break; 5841 default: return -1; 5842 } 5843 } 5844 5845 if (WIFEXITED(status)) { 5846 // The child exited normally; get its exit code. 5847 return WEXITSTATUS(status); 5848 } else if (WIFSIGNALED(status)) { 5849 // The child exited because of a signal 5850 // The best value to return is 0x80 + signal number, 5851 // because that is what all Unix shells do, and because 5852 // it allows callers to distinguish between process exit and 5853 // process death by signal. 5854 return 0x80 + WTERMSIG(status); 5855 } else { 5856 // Unknown exit code; pass it through 5857 return status; 5858 } 5859 } 5860} 5861