os_solaris.cpp revision 242:d95b224e9f17
1/* 2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25// do not include precompiled header file 26# include "incls/_os_solaris.cpp.incl" 27 28// put OS-includes here 29# include <dlfcn.h> 30# include <errno.h> 31# include <link.h> 32# include <poll.h> 33# include <pthread.h> 34# include <pwd.h> 35# include <schedctl.h> 36# include <setjmp.h> 37# include <signal.h> 38# include <stdio.h> 39# include <alloca.h> 40# include <sys/filio.h> 41# include <sys/ipc.h> 42# include <sys/lwp.h> 43# include <sys/machelf.h> // for elf Sym structure used by dladdr1 44# include <sys/mman.h> 45# include <sys/processor.h> 46# include <sys/procset.h> 47# include <sys/pset.h> 48# include <sys/resource.h> 49# include <sys/shm.h> 50# include <sys/socket.h> 51# include <sys/stat.h> 52# include <sys/systeminfo.h> 53# include <sys/time.h> 54# include <sys/times.h> 55# include <sys/types.h> 56# include <sys/wait.h> 57# include <sys/utsname.h> 58# include <thread.h> 59# include <unistd.h> 60# include <sys/priocntl.h> 61# include <sys/rtpriocntl.h> 62# include <sys/tspriocntl.h> 63# include <sys/iapriocntl.h> 64# include <sys/loadavg.h> 65# include <string.h> 66 67# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 68# include <sys/procfs.h> // see comment in <sys/procfs.h> 69 70#define MAX_PATH (2 * K) 71 72// for timer info max values which include all bits 73#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 74 75#ifdef _GNU_SOURCE 76// See bug #6514594 77extern "C" int madvise(caddr_t, size_t, int); 78extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 79 int attr, int mask); 80#endif //_GNU_SOURCE 81 82/* 83 MPSS Changes Start. 84 The JVM binary needs to be built and run on pre-Solaris 9 85 systems, but the constants needed by MPSS are only in Solaris 9 86 header files. They are textually replicated here to allow 87 building on earlier systems. Once building on Solaris 8 is 88 no longer a requirement, these #defines can be replaced by ordinary 89 system .h inclusion. 90 91 In earlier versions of the JDK and Solaris, we used ISM for large pages. 92 But ISM requires shared memory to achieve this and thus has many caveats. 93 MPSS is a fully transparent and is a cleaner way to get large pages. 94 Although we still require keeping ISM for backward compatiblitiy as well as 95 giving the opportunity to use large pages on older systems it is 96 recommended that MPSS be used for Solaris 9 and above. 97 98*/ 99 100#ifndef MC_HAT_ADVISE 101 102struct memcntl_mha { 103 uint_t mha_cmd; /* command(s) */ 104 uint_t mha_flags; 105 size_t mha_pagesize; 106}; 107#define MC_HAT_ADVISE 7 /* advise hat map size */ 108#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 109#define MAP_ALIGN 0x200 /* addr specifies alignment */ 110 111#endif 112// MPSS Changes End. 113 114 115// Here are some liblgrp types from sys/lgrp_user.h to be able to 116// compile on older systems without this header file. 117 118#ifndef MADV_ACCESS_LWP 119# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 120#endif 121#ifndef MADV_ACCESS_MANY 122# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 123#endif 124 125#ifndef LGRP_RSRC_CPU 126# define LGRP_RSRC_CPU 0 /* CPU resources */ 127#endif 128#ifndef LGRP_RSRC_MEM 129# define LGRP_RSRC_MEM 1 /* memory resources */ 130#endif 131 132// Some more macros from sys/mman.h that are not present in Solaris 8. 133 134#ifndef MAX_MEMINFO_CNT 135/* 136 * info_req request type definitions for meminfo 137 * request types starting with MEMINFO_V are used for Virtual addresses 138 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 139 * addresses 140 */ 141# define MEMINFO_SHIFT 16 142# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 143# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 144# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 145# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 146# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 147# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 148# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 149# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 150 151/* maximum number of addresses meminfo() can process at a time */ 152# define MAX_MEMINFO_CNT 256 153 154/* maximum number of request types */ 155# define MAX_MEMINFO_REQ 31 156#endif 157 158// see thr_setprio(3T) for the basis of these numbers 159#define MinimumPriority 0 160#define NormalPriority 64 161#define MaximumPriority 127 162 163// Values for ThreadPriorityPolicy == 1 164int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 165 80, 96, 112, 124, 127 }; 166 167// System parameters used internally 168static clock_t clock_tics_per_sec = 100; 169 170// For diagnostics to print a message once. see run_periodic_checks 171static bool check_addr0_done = false; 172static sigset_t check_signal_done; 173static bool check_signals = true; 174 175address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 176address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 177 178address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 179 180 181// "default" initializers for missing libc APIs 182extern "C" { 183 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 184 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 185 186 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 187 static int lwp_cond_destroy(cond_t *cv) { return 0; } 188} 189 190// "default" initializers for pthread-based synchronization 191extern "C" { 192 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 193 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 194} 195 196// Thread Local Storage 197// This is common to all Solaris platforms so it is defined here, 198// in this common file. 199// The declarations are in the os_cpu threadLS*.hpp files. 200// 201// Static member initialization for TLS 202Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 203 204#ifndef PRODUCT 205#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 206 207int ThreadLocalStorage::_tcacheHit = 0; 208int ThreadLocalStorage::_tcacheMiss = 0; 209 210void ThreadLocalStorage::print_statistics() { 211 int total = _tcacheMiss+_tcacheHit; 212 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 213 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 214} 215#undef _PCT 216#endif // PRODUCT 217 218Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 219 int index) { 220 Thread *thread = get_thread_slow(); 221 if (thread != NULL) { 222 address sp = os::current_stack_pointer(); 223 guarantee(thread->_stack_base == NULL || 224 (sp <= thread->_stack_base && 225 sp >= thread->_stack_base - thread->_stack_size) || 226 is_error_reported(), 227 "sp must be inside of selected thread stack"); 228 229 thread->_self_raw_id = raw_id; // mark for quick retrieval 230 _get_thread_cache[ index ] = thread; 231 } 232 return thread; 233} 234 235 236static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 237#define NO_CACHED_THREAD ((Thread*)all_zero) 238 239void ThreadLocalStorage::pd_set_thread(Thread* thread) { 240 241 // Store the new value before updating the cache to prevent a race 242 // between get_thread_via_cache_slowly() and this store operation. 243 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 244 245 // Update thread cache with new thread if setting on thread create, 246 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 247 uintptr_t raw = pd_raw_thread_id(); 248 int ix = pd_cache_index(raw); 249 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 250} 251 252void ThreadLocalStorage::pd_init() { 253 for (int i = 0; i < _pd_cache_size; i++) { 254 _get_thread_cache[i] = NO_CACHED_THREAD; 255 } 256} 257 258// Invalidate all the caches (happens to be the same as pd_init). 259void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 260 261#undef NO_CACHED_THREAD 262 263// END Thread Local Storage 264 265static inline size_t adjust_stack_size(address base, size_t size) { 266 if ((ssize_t)size < 0) { 267 // 4759953: Compensate for ridiculous stack size. 268 size = max_intx; 269 } 270 if (size > (size_t)base) { 271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 272 size = (size_t)base; 273 } 274 return size; 275} 276 277static inline stack_t get_stack_info() { 278 stack_t st; 279 int retval = thr_stksegment(&st); 280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 281 assert(retval == 0, "incorrect return value from thr_stksegment"); 282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 284 return st; 285} 286 287address os::current_stack_base() { 288 int r = thr_main() ; 289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 290 bool is_primordial_thread = r; 291 292 // Workaround 4352906, avoid calls to thr_stksegment by 293 // thr_main after the first one (it looks like we trash 294 // some data, causing the value for ss_sp to be incorrect). 295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 296 stack_t st = get_stack_info(); 297 if (is_primordial_thread) { 298 // cache initial value of stack base 299 os::Solaris::_main_stack_base = (address)st.ss_sp; 300 } 301 return (address)st.ss_sp; 302 } else { 303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 304 return os::Solaris::_main_stack_base; 305 } 306} 307 308size_t os::current_stack_size() { 309 size_t size; 310 311 int r = thr_main() ; 312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 313 if(!r) { 314 size = get_stack_info().ss_size; 315 } else { 316 struct rlimit limits; 317 getrlimit(RLIMIT_STACK, &limits); 318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 319 } 320 // base may not be page aligned 321 address base = current_stack_base(); 322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 323 return (size_t)(base - bottom); 324} 325 326// interruptible infrastructure 327 328// setup_interruptible saves the thread state before going into an 329// interruptible system call. 330// The saved state is used to restore the thread to 331// its former state whether or not an interrupt is received. 332// Used by classloader os::read 333// hpi calls skip this layer and stay in _thread_in_native 334 335void os::Solaris::setup_interruptible(JavaThread* thread) { 336 337 JavaThreadState thread_state = thread->thread_state(); 338 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 341 OSThread* osthread = thread->osthread(); 342 osthread->set_saved_interrupt_thread_state(thread_state); 343 thread->frame_anchor()->make_walkable(thread); 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 345} 346 347// Version of setup_interruptible() for threads that are already in 348// _thread_blocked. Used by os_sleep(). 349void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 350 thread->frame_anchor()->make_walkable(thread); 351} 352 353JavaThread* os::Solaris::setup_interruptible() { 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 355 setup_interruptible(thread); 356 return thread; 357} 358 359void os::Solaris::try_enable_extended_io() { 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); 361 362 if (!UseExtendedFileIO) { 363 return; 364 } 365 366 enable_extended_FILE_stdio_t enabler = 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 368 "enable_extended_FILE_stdio"); 369 if (enabler) { 370 enabler(-1, -1); 371 } 372} 373 374 375#ifdef ASSERT 376 377JavaThread* os::Solaris::setup_interruptible_native() { 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 379 JavaThreadState thread_state = thread->thread_state(); 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 381 return thread; 382} 383 384void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 385 JavaThreadState thread_state = thread->thread_state(); 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 387} 388#endif 389 390// cleanup_interruptible reverses the effects of setup_interruptible 391// setup_interruptible_already_blocked() does not need any cleanup. 392 393void os::Solaris::cleanup_interruptible(JavaThread* thread) { 394 OSThread* osthread = thread->osthread(); 395 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 397} 398 399// I/O interruption related counters called in _INTERRUPTIBLE 400 401void os::Solaris::bump_interrupted_before_count() { 402 RuntimeService::record_interrupted_before_count(); 403} 404 405void os::Solaris::bump_interrupted_during_count() { 406 RuntimeService::record_interrupted_during_count(); 407} 408 409static int _processors_online = 0; 410 411 jint os::Solaris::_os_thread_limit = 0; 412volatile jint os::Solaris::_os_thread_count = 0; 413 414julong os::available_memory() { 415 return Solaris::available_memory(); 416} 417 418julong os::Solaris::available_memory() { 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 420} 421 422julong os::Solaris::_physical_memory = 0; 423 424julong os::physical_memory() { 425 return Solaris::physical_memory(); 426} 427 428julong os::allocatable_physical_memory(julong size) { 429#ifdef _LP64 430 return size; 431#else 432 julong result = MIN2(size, (julong)3835*M); 433 if (!is_allocatable(result)) { 434 // Memory allocations will be aligned but the alignment 435 // is not known at this point. Alignments will 436 // be at most to LargePageSizeInBytes. Protect 437 // allocations from alignments up to illegal 438 // values. If at this point 2G is illegal. 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 440 result = MIN2(size, reasonable_size); 441 } 442 return result; 443#endif 444} 445 446static hrtime_t first_hrtime = 0; 447static const hrtime_t hrtime_hz = 1000*1000*1000; 448const int LOCK_BUSY = 1; 449const int LOCK_FREE = 0; 450const int LOCK_INVALID = -1; 451static volatile hrtime_t max_hrtime = 0; 452static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 453 454 455void os::Solaris::initialize_system_info() { 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 459} 460 461int os::active_processor_count() { 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 463 pid_t pid = getpid(); 464 psetid_t pset = PS_NONE; 465 // Are we running in a processor set? 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 467 if (pset != PS_NONE) { 468 uint_t pset_cpus; 469 // Query number of cpus in processor set 470 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 471 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 472 _processors_online = pset_cpus; 473 return pset_cpus; 474 } 475 } 476 } 477 // Otherwise return number of online cpus 478 return online_cpus; 479} 480 481static bool find_processors_in_pset(psetid_t pset, 482 processorid_t** id_array, 483 uint_t* id_length) { 484 bool result = false; 485 // Find the number of processors in the processor set. 486 if (pset_info(pset, NULL, id_length, NULL) == 0) { 487 // Make up an array to hold their ids. 488 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 489 // Fill in the array with their processor ids. 490 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 491 result = true; 492 } 493 } 494 return result; 495} 496 497// Callers of find_processors_online() must tolerate imprecise results -- 498// the system configuration can change asynchronously because of DR 499// or explicit psradm operations. 500// 501// We also need to take care that the loop (below) terminates as the 502// number of processors online can change between the _SC_NPROCESSORS_ONLN 503// request and the loop that builds the list of processor ids. Unfortunately 504// there's no reliable way to determine the maximum valid processor id, 505// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 506// man pages, which claim the processor id set is "sparse, but 507// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 508// exit the loop. 509// 510// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 511// not available on S8.0. 512 513static bool find_processors_online(processorid_t** id_array, 514 uint* id_length) { 515 const processorid_t MAX_PROCESSOR_ID = 100000 ; 516 // Find the number of processors online. 517 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 518 // Make up an array to hold their ids. 519 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 520 // Processors need not be numbered consecutively. 521 long found = 0; 522 processorid_t next = 0; 523 while (found < *id_length && next < MAX_PROCESSOR_ID) { 524 processor_info_t info; 525 if (processor_info(next, &info) == 0) { 526 // NB, PI_NOINTR processors are effectively online ... 527 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 528 (*id_array)[found] = next; 529 found += 1; 530 } 531 } 532 next += 1; 533 } 534 if (found < *id_length) { 535 // The loop above didn't identify the expected number of processors. 536 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 537 // and re-running the loop, above, but there's no guarantee of progress 538 // if the system configuration is in flux. Instead, we just return what 539 // we've got. Note that in the worst case find_processors_online() could 540 // return an empty set. (As a fall-back in the case of the empty set we 541 // could just return the ID of the current processor). 542 *id_length = found ; 543 } 544 545 return true; 546} 547 548static bool assign_distribution(processorid_t* id_array, 549 uint id_length, 550 uint* distribution, 551 uint distribution_length) { 552 // We assume we can assign processorid_t's to uint's. 553 assert(sizeof(processorid_t) == sizeof(uint), 554 "can't convert processorid_t to uint"); 555 // Quick check to see if we won't succeed. 556 if (id_length < distribution_length) { 557 return false; 558 } 559 // Assign processor ids to the distribution. 560 // Try to shuffle processors to distribute work across boards, 561 // assuming 4 processors per board. 562 const uint processors_per_board = ProcessDistributionStride; 563 // Find the maximum processor id. 564 processorid_t max_id = 0; 565 for (uint m = 0; m < id_length; m += 1) { 566 max_id = MAX2(max_id, id_array[m]); 567 } 568 // The next id, to limit loops. 569 const processorid_t limit_id = max_id + 1; 570 // Make up markers for available processors. 571 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 572 for (uint c = 0; c < limit_id; c += 1) { 573 available_id[c] = false; 574 } 575 for (uint a = 0; a < id_length; a += 1) { 576 available_id[id_array[a]] = true; 577 } 578 // Step by "boards", then by "slot", copying to "assigned". 579 // NEEDS_CLEANUP: The assignment of processors should be stateful, 580 // remembering which processors have been assigned by 581 // previous calls, etc., so as to distribute several 582 // independent calls of this method. What we'd like is 583 // It would be nice to have an API that let us ask 584 // how many processes are bound to a processor, 585 // but we don't have that, either. 586 // In the short term, "board" is static so that 587 // subsequent distributions don't all start at board 0. 588 static uint board = 0; 589 uint assigned = 0; 590 // Until we've found enough processors .... 591 while (assigned < distribution_length) { 592 // ... find the next available processor in the board. 593 for (uint slot = 0; slot < processors_per_board; slot += 1) { 594 uint try_id = board * processors_per_board + slot; 595 if ((try_id < limit_id) && (available_id[try_id] == true)) { 596 distribution[assigned] = try_id; 597 available_id[try_id] = false; 598 assigned += 1; 599 break; 600 } 601 } 602 board += 1; 603 if (board * processors_per_board + 0 >= limit_id) { 604 board = 0; 605 } 606 } 607 if (available_id != NULL) { 608 FREE_C_HEAP_ARRAY(bool, available_id); 609 } 610 return true; 611} 612 613bool os::distribute_processes(uint length, uint* distribution) { 614 bool result = false; 615 // Find the processor id's of all the available CPUs. 616 processorid_t* id_array = NULL; 617 uint id_length = 0; 618 // There are some races between querying information and using it, 619 // since processor sets can change dynamically. 620 psetid_t pset = PS_NONE; 621 // Are we running in a processor set? 622 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 623 result = find_processors_in_pset(pset, &id_array, &id_length); 624 } else { 625 result = find_processors_online(&id_array, &id_length); 626 } 627 if (result == true) { 628 if (id_length >= length) { 629 result = assign_distribution(id_array, id_length, distribution, length); 630 } else { 631 result = false; 632 } 633 } 634 if (id_array != NULL) { 635 FREE_C_HEAP_ARRAY(processorid_t, id_array); 636 } 637 return result; 638} 639 640bool os::bind_to_processor(uint processor_id) { 641 // We assume that a processorid_t can be stored in a uint. 642 assert(sizeof(uint) == sizeof(processorid_t), 643 "can't convert uint to processorid_t"); 644 int bind_result = 645 processor_bind(P_LWPID, // bind LWP. 646 P_MYID, // bind current LWP. 647 (processorid_t) processor_id, // id. 648 NULL); // don't return old binding. 649 return (bind_result == 0); 650} 651 652bool os::getenv(const char* name, char* buffer, int len) { 653 char* val = ::getenv( name ); 654 if ( val == NULL 655 || strlen(val) + 1 > len ) { 656 if (len > 0) buffer[0] = 0; // return a null string 657 return false; 658 } 659 strcpy( buffer, val ); 660 return true; 661} 662 663 664// Return true if user is running as root. 665 666bool os::have_special_privileges() { 667 static bool init = false; 668 static bool privileges = false; 669 if (!init) { 670 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 671 init = true; 672 } 673 return privileges; 674} 675 676 677static char* get_property(char* name, char* buffer, int buffer_size) { 678 if (os::getenv(name, buffer, buffer_size)) { 679 return buffer; 680 } 681 static char empty[] = ""; 682 return empty; 683} 684 685 686void os::init_system_properties_values() { 687 char arch[12]; 688 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 689 690 // The next steps are taken in the product version: 691 // 692 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 693 // This library should be located at: 694 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 695 // 696 // If "/jre/lib/" appears at the right place in the path, then we 697 // assume libjvm[_g].so is installed in a JDK and we use this path. 698 // 699 // Otherwise exit with message: "Could not create the Java virtual machine." 700 // 701 // The following extra steps are taken in the debugging version: 702 // 703 // If "/jre/lib/" does NOT appear at the right place in the path 704 // instead of exit check for $JAVA_HOME environment variable. 705 // 706 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 707 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 708 // it looks like libjvm[_g].so is installed there 709 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 710 // 711 // Otherwise exit. 712 // 713 // Important note: if the location of libjvm.so changes this 714 // code needs to be changed accordingly. 715 716 // The next few definitions allow the code to be verbatim: 717#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 718#define free(p) FREE_C_HEAP_ARRAY(char, p) 719#define getenv(n) ::getenv(n) 720 721#define EXTENSIONS_DIR "/lib/ext" 722#define ENDORSED_DIR "/lib/endorsed" 723#define COMMON_DIR "/usr/jdk/packages" 724 725 { 726 /* sysclasspath, java_home, dll_dir */ 727 { 728 char *home_path; 729 char *dll_path; 730 char *pslash; 731 char buf[MAXPATHLEN]; 732 os::jvm_path(buf, sizeof(buf)); 733 734 // Found the full path to libjvm.so. 735 // Now cut the path to <java_home>/jre if we can. 736 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 737 pslash = strrchr(buf, '/'); 738 if (pslash != NULL) 739 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 740 dll_path = malloc(strlen(buf) + 1); 741 if (dll_path == NULL) 742 return; 743 strcpy(dll_path, buf); 744 Arguments::set_dll_dir(dll_path); 745 746 if (pslash != NULL) { 747 pslash = strrchr(buf, '/'); 748 if (pslash != NULL) { 749 *pslash = '\0'; /* get rid of /<arch> */ 750 pslash = strrchr(buf, '/'); 751 if (pslash != NULL) 752 *pslash = '\0'; /* get rid of /lib */ 753 } 754 } 755 756 home_path = malloc(strlen(buf) + 1); 757 if (home_path == NULL) 758 return; 759 strcpy(home_path, buf); 760 Arguments::set_java_home(home_path); 761 762 if (!set_boot_path('/', ':')) 763 return; 764 } 765 766 /* 767 * Where to look for native libraries 768 */ 769 { 770 // Use dlinfo() to determine the correct java.library.path. 771 // 772 // If we're launched by the Java launcher, and the user 773 // does not set java.library.path explicitly on the commandline, 774 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 775 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 776 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 777 // /usr/lib), which is exactly what we want. 778 // 779 // If the user does set java.library.path, it completely 780 // overwrites this setting, and always has. 781 // 782 // If we're not launched by the Java launcher, we may 783 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 784 // settings. Again, dlinfo does exactly what we want. 785 786 Dl_serinfo _info, *info = &_info; 787 Dl_serpath *path; 788 char* library_path; 789 char *common_path; 790 int i; 791 792 // determine search path count and required buffer size 793 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 794 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 795 } 796 797 // allocate new buffer and initialize 798 info = (Dl_serinfo*)malloc(_info.dls_size); 799 if (info == NULL) { 800 vm_exit_out_of_memory(_info.dls_size, 801 "init_system_properties_values info"); 802 } 803 info->dls_size = _info.dls_size; 804 info->dls_cnt = _info.dls_cnt; 805 806 // obtain search path information 807 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 808 free(info); 809 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 810 } 811 812 path = &info->dls_serpath[0]; 813 814 // Note: Due to a legacy implementation, most of the library path 815 // is set in the launcher. This was to accomodate linking restrictions 816 // on legacy Solaris implementations (which are no longer supported). 817 // Eventually, all the library path setting will be done here. 818 // 819 // However, to prevent the proliferation of improperly built native 820 // libraries, the new path component /usr/jdk/packages is added here. 821 822 // Determine the actual CPU architecture. 823 char cpu_arch[12]; 824 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 825#ifdef _LP64 826 // If we are a 64-bit vm, perform the following translations: 827 // sparc -> sparcv9 828 // i386 -> amd64 829 if (strcmp(cpu_arch, "sparc") == 0) 830 strcat(cpu_arch, "v9"); 831 else if (strcmp(cpu_arch, "i386") == 0) 832 strcpy(cpu_arch, "amd64"); 833#endif 834 835 // Construct the invariant part of ld_library_path. Note that the 836 // space for the colon and the trailing null are provided by the 837 // nulls included by the sizeof operator. 838 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 839 common_path = malloc(bufsize); 840 if (common_path == NULL) { 841 free(info); 842 vm_exit_out_of_memory(bufsize, 843 "init_system_properties_values common_path"); 844 } 845 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 846 847 // struct size is more than sufficient for the path components obtained 848 // through the dlinfo() call, so only add additional space for the path 849 // components explicitly added here. 850 bufsize = info->dls_size + strlen(common_path); 851 library_path = malloc(bufsize); 852 if (library_path == NULL) { 853 free(info); 854 free(common_path); 855 vm_exit_out_of_memory(bufsize, 856 "init_system_properties_values library_path"); 857 } 858 library_path[0] = '\0'; 859 860 // Construct the desired Java library path from the linker's library 861 // search path. 862 // 863 // For compatibility, it is optimal that we insert the additional path 864 // components specific to the Java VM after those components specified 865 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 866 // infrastructure. 867 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 868 strcpy(library_path, common_path); 869 } else { 870 int inserted = 0; 871 for (i = 0; i < info->dls_cnt; i++, path++) { 872 uint_t flags = path->dls_flags & LA_SER_MASK; 873 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 874 strcat(library_path, common_path); 875 strcat(library_path, os::path_separator()); 876 inserted = 1; 877 } 878 strcat(library_path, path->dls_name); 879 strcat(library_path, os::path_separator()); 880 } 881 // eliminate trailing path separator 882 library_path[strlen(library_path)-1] = '\0'; 883 } 884 885 // happens before argument parsing - can't use a trace flag 886 // tty->print_raw("init_system_properties_values: native lib path: "); 887 // tty->print_raw_cr(library_path); 888 889 // callee copies into its own buffer 890 Arguments::set_library_path(library_path); 891 892 free(common_path); 893 free(library_path); 894 free(info); 895 } 896 897 /* 898 * Extensions directories. 899 * 900 * Note that the space for the colon and the trailing null are provided 901 * by the nulls included by the sizeof operator (so actually one byte more 902 * than necessary is allocated). 903 */ 904 { 905 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 906 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 907 sizeof(EXTENSIONS_DIR)); 908 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 909 Arguments::get_java_home()); 910 Arguments::set_ext_dirs(buf); 911 } 912 913 /* Endorsed standards default directory. */ 914 { 915 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 916 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 917 Arguments::set_endorsed_dirs(buf); 918 } 919 } 920 921#undef malloc 922#undef free 923#undef getenv 924#undef EXTENSIONS_DIR 925#undef ENDORSED_DIR 926#undef COMMON_DIR 927 928} 929 930void os::breakpoint() { 931 BREAKPOINT; 932} 933 934bool os::obsolete_option(const JavaVMOption *option) 935{ 936 if (!strncmp(option->optionString, "-Xt", 3)) { 937 return true; 938 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 941 return true; 942 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 943 return true; 944 } 945 return false; 946} 947 948bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 949 address stackStart = (address)thread->stack_base(); 950 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 951 if (sp < stackStart && sp >= stackEnd ) return true; 952 return false; 953} 954 955extern "C" void breakpoint() { 956 // use debugger to set breakpoint here 957} 958 959// Returns an estimate of the current stack pointer. Result must be guaranteed to 960// point into the calling threads stack, and be no lower than the current stack 961// pointer. 962address os::current_stack_pointer() { 963 volatile int dummy; 964 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 965 return sp; 966} 967 968static thread_t main_thread; 969 970// Thread start routine for all new Java threads 971extern "C" void* java_start(void* thread_addr) { 972 // Try to randomize the cache line index of hot stack frames. 973 // This helps when threads of the same stack traces evict each other's 974 // cache lines. The threads can be either from the same JVM instance, or 975 // from different JVM instances. The benefit is especially true for 976 // processors with hyperthreading technology. 977 static int counter = 0; 978 int pid = os::current_process_id(); 979 alloca(((pid ^ counter++) & 7) * 128); 980 981 int prio; 982 Thread* thread = (Thread*)thread_addr; 983 OSThread* osthr = thread->osthread(); 984 985 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 986 thread->_schedctl = (void *) schedctl_init () ; 987 988 if (UseNUMA) { 989 int lgrp_id = os::numa_get_group_id(); 990 if (lgrp_id != -1) { 991 thread->set_lgrp_id(lgrp_id); 992 } 993 } 994 995 // If the creator called set priority before we started, 996 // we need to call set priority now that we have an lwp. 997 // Get the priority from libthread and set the priority 998 // for the new Solaris lwp. 999 if ( osthr->thread_id() != -1 ) { 1000 if ( UseThreadPriorities ) { 1001 thr_getprio(osthr->thread_id(), &prio); 1002 if (ThreadPriorityVerbose) { 1003 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1004 osthr->thread_id(), osthr->lwp_id(), prio ); 1005 } 1006 os::set_native_priority(thread, prio); 1007 } 1008 } else if (ThreadPriorityVerbose) { 1009 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1010 } 1011 1012 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1013 1014 // initialize signal mask for this thread 1015 os::Solaris::hotspot_sigmask(thread); 1016 1017 thread->run(); 1018 1019 // One less thread is executing 1020 // When the VMThread gets here, the main thread may have already exited 1021 // which frees the CodeHeap containing the Atomic::dec code 1022 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1023 Atomic::dec(&os::Solaris::_os_thread_count); 1024 } 1025 1026 if (UseDetachedThreads) { 1027 thr_exit(NULL); 1028 ShouldNotReachHere(); 1029 } 1030 return NULL; 1031} 1032 1033static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1034 // Allocate the OSThread object 1035 OSThread* osthread = new OSThread(NULL, NULL); 1036 if (osthread == NULL) return NULL; 1037 1038 // Store info on the Solaris thread into the OSThread 1039 osthread->set_thread_id(thread_id); 1040 osthread->set_lwp_id(_lwp_self()); 1041 thread->_schedctl = (void *) schedctl_init () ; 1042 1043 if (UseNUMA) { 1044 int lgrp_id = os::numa_get_group_id(); 1045 if (lgrp_id != -1) { 1046 thread->set_lgrp_id(lgrp_id); 1047 } 1048 } 1049 1050 if ( ThreadPriorityVerbose ) { 1051 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1052 osthread->thread_id(), osthread->lwp_id() ); 1053 } 1054 1055 // Initial thread state is INITIALIZED, not SUSPENDED 1056 osthread->set_state(INITIALIZED); 1057 1058 return osthread; 1059} 1060 1061void os::Solaris::hotspot_sigmask(Thread* thread) { 1062 1063 //Save caller's signal mask 1064 sigset_t sigmask; 1065 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1066 OSThread *osthread = thread->osthread(); 1067 osthread->set_caller_sigmask(sigmask); 1068 1069 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1070 if (!ReduceSignalUsage) { 1071 if (thread->is_VM_thread()) { 1072 // Only the VM thread handles BREAK_SIGNAL ... 1073 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1074 } else { 1075 // ... all other threads block BREAK_SIGNAL 1076 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1077 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1078 } 1079 } 1080} 1081 1082bool os::create_attached_thread(JavaThread* thread) { 1083#ifdef ASSERT 1084 thread->verify_not_published(); 1085#endif 1086 OSThread* osthread = create_os_thread(thread, thr_self()); 1087 if (osthread == NULL) { 1088 return false; 1089 } 1090 1091 // Initial thread state is RUNNABLE 1092 osthread->set_state(RUNNABLE); 1093 thread->set_osthread(osthread); 1094 1095 // initialize signal mask for this thread 1096 // and save the caller's signal mask 1097 os::Solaris::hotspot_sigmask(thread); 1098 1099 return true; 1100} 1101 1102bool os::create_main_thread(JavaThread* thread) { 1103#ifdef ASSERT 1104 thread->verify_not_published(); 1105#endif 1106 if (_starting_thread == NULL) { 1107 _starting_thread = create_os_thread(thread, main_thread); 1108 if (_starting_thread == NULL) { 1109 return false; 1110 } 1111 } 1112 1113 // The primodial thread is runnable from the start 1114 _starting_thread->set_state(RUNNABLE); 1115 1116 thread->set_osthread(_starting_thread); 1117 1118 // initialize signal mask for this thread 1119 // and save the caller's signal mask 1120 os::Solaris::hotspot_sigmask(thread); 1121 1122 return true; 1123} 1124 1125// _T2_libthread is true if we believe we are running with the newer 1126// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1127bool os::Solaris::_T2_libthread = false; 1128 1129bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1130 // Allocate the OSThread object 1131 OSThread* osthread = new OSThread(NULL, NULL); 1132 if (osthread == NULL) { 1133 return false; 1134 } 1135 1136 if ( ThreadPriorityVerbose ) { 1137 char *thrtyp; 1138 switch ( thr_type ) { 1139 case vm_thread: 1140 thrtyp = (char *)"vm"; 1141 break; 1142 case cgc_thread: 1143 thrtyp = (char *)"cgc"; 1144 break; 1145 case pgc_thread: 1146 thrtyp = (char *)"pgc"; 1147 break; 1148 case java_thread: 1149 thrtyp = (char *)"java"; 1150 break; 1151 case compiler_thread: 1152 thrtyp = (char *)"compiler"; 1153 break; 1154 case watcher_thread: 1155 thrtyp = (char *)"watcher"; 1156 break; 1157 default: 1158 thrtyp = (char *)"unknown"; 1159 break; 1160 } 1161 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1162 } 1163 1164 // Calculate stack size if it's not specified by caller. 1165 if (stack_size == 0) { 1166 // The default stack size 1M (2M for LP64). 1167 stack_size = (BytesPerWord >> 2) * K * K; 1168 1169 switch (thr_type) { 1170 case os::java_thread: 1171 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1172 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1173 break; 1174 case os::compiler_thread: 1175 if (CompilerThreadStackSize > 0) { 1176 stack_size = (size_t)(CompilerThreadStackSize * K); 1177 break; 1178 } // else fall through: 1179 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1180 case os::vm_thread: 1181 case os::pgc_thread: 1182 case os::cgc_thread: 1183 case os::watcher_thread: 1184 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1185 break; 1186 } 1187 } 1188 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1189 1190 // Initial state is ALLOCATED but not INITIALIZED 1191 osthread->set_state(ALLOCATED); 1192 1193 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1194 // We got lots of threads. Check if we still have some address space left. 1195 // Need to be at least 5Mb of unreserved address space. We do check by 1196 // trying to reserve some. 1197 const size_t VirtualMemoryBangSize = 20*K*K; 1198 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1199 if (mem == NULL) { 1200 delete osthread; 1201 return false; 1202 } else { 1203 // Release the memory again 1204 os::release_memory(mem, VirtualMemoryBangSize); 1205 } 1206 } 1207 1208 // Setup osthread because the child thread may need it. 1209 thread->set_osthread(osthread); 1210 1211 // Create the Solaris thread 1212 // explicit THR_BOUND for T2_libthread case in case 1213 // that assumption is not accurate, but our alternate signal stack 1214 // handling is based on it which must have bound threads 1215 thread_t tid = 0; 1216 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1217 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1218 (thr_type == vm_thread) || 1219 (thr_type == cgc_thread) || 1220 (thr_type == pgc_thread) || 1221 (thr_type == compiler_thread && BackgroundCompilation)) ? 1222 THR_BOUND : 0); 1223 int status; 1224 1225 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1226 // 1227 // On multiprocessors systems, libthread sometimes under-provisions our 1228 // process with LWPs. On a 30-way systems, for instance, we could have 1229 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1230 // to our process. This can result in under utilization of PEs. 1231 // I suspect the problem is related to libthread's LWP 1232 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1233 // upcall policy. 1234 // 1235 // The following code is palliative -- it attempts to ensure that our 1236 // process has sufficient LWPs to take advantage of multiple PEs. 1237 // Proper long-term cures include using user-level threads bound to LWPs 1238 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1239 // slight timing window with respect to sampling _os_thread_count, but 1240 // the race is benign. Also, we should periodically recompute 1241 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1242 // the number of PEs in our partition. You might be tempted to use 1243 // THR_NEW_LWP here, but I'd recommend against it as that could 1244 // result in undesirable growth of the libthread's LWP pool. 1245 // The fix below isn't sufficient; for instance, it doesn't take into count 1246 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1247 // 1248 // Some pathologies this scheme doesn't handle: 1249 // * Threads can block, releasing the LWPs. The LWPs can age out. 1250 // When a large number of threads become ready again there aren't 1251 // enough LWPs available to service them. This can occur when the 1252 // number of ready threads oscillates. 1253 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1254 // 1255 // Finally, we should call thr_setconcurrency() periodically to refresh 1256 // the LWP pool and thwart the LWP age-out mechanism. 1257 // The "+3" term provides a little slop -- we want to slightly overprovision. 1258 1259 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1260 if (!(flags & THR_BOUND)) { 1261 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1262 } 1263 } 1264 // Although this doesn't hurt, we should warn of undefined behavior 1265 // when using unbound T1 threads with schedctl(). This should never 1266 // happen, as the compiler and VM threads are always created bound 1267 DEBUG_ONLY( 1268 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1269 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1270 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1271 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1272 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1273 } 1274 ); 1275 1276 1277 // Mark that we don't have an lwp or thread id yet. 1278 // In case we attempt to set the priority before the thread starts. 1279 osthread->set_lwp_id(-1); 1280 osthread->set_thread_id(-1); 1281 1282 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1283 if (status != 0) { 1284 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1285 perror("os::create_thread"); 1286 } 1287 thread->set_osthread(NULL); 1288 // Need to clean up stuff we've allocated so far 1289 delete osthread; 1290 return false; 1291 } 1292 1293 Atomic::inc(&os::Solaris::_os_thread_count); 1294 1295 // Store info on the Solaris thread into the OSThread 1296 osthread->set_thread_id(tid); 1297 1298 // Remember that we created this thread so we can set priority on it 1299 osthread->set_vm_created(); 1300 1301 // Set the default thread priority otherwise use NormalPriority 1302 1303 if ( UseThreadPriorities ) { 1304 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1305 java_to_os_priority[NormPriority] : 1306 DefaultThreadPriority); 1307 } 1308 1309 // Initial thread state is INITIALIZED, not SUSPENDED 1310 osthread->set_state(INITIALIZED); 1311 1312 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1313 return true; 1314} 1315 1316/* defined for >= Solaris 10. This allows builds on earlier versions 1317 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1318 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1319 * and -XX:+UseAltSigs does nothing since these should have no conflict 1320 */ 1321#if !defined(SIGJVM1) 1322#define SIGJVM1 39 1323#define SIGJVM2 40 1324#endif 1325 1326debug_only(static bool signal_sets_initialized = false); 1327static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1328int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1329int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1330 1331bool os::Solaris::is_sig_ignored(int sig) { 1332 struct sigaction oact; 1333 sigaction(sig, (struct sigaction*)NULL, &oact); 1334 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1335 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1336 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1337 return true; 1338 else 1339 return false; 1340} 1341 1342// Note: SIGRTMIN is a macro that calls sysconf() so it will 1343// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1344static bool isJVM1available() { 1345 return SIGJVM1 < SIGRTMIN; 1346} 1347 1348void os::Solaris::signal_sets_init() { 1349 // Should also have an assertion stating we are still single-threaded. 1350 assert(!signal_sets_initialized, "Already initialized"); 1351 // Fill in signals that are necessarily unblocked for all threads in 1352 // the VM. Currently, we unblock the following signals: 1353 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1354 // by -Xrs (=ReduceSignalUsage)); 1355 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1356 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1357 // the dispositions or masks wrt these signals. 1358 // Programs embedding the VM that want to use the above signals for their 1359 // own purposes must, at this time, use the "-Xrs" option to prevent 1360 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1361 // (See bug 4345157, and other related bugs). 1362 // In reality, though, unblocking these signals is really a nop, since 1363 // these signals are not blocked by default. 1364 sigemptyset(&unblocked_sigs); 1365 sigemptyset(&allowdebug_blocked_sigs); 1366 sigaddset(&unblocked_sigs, SIGILL); 1367 sigaddset(&unblocked_sigs, SIGSEGV); 1368 sigaddset(&unblocked_sigs, SIGBUS); 1369 sigaddset(&unblocked_sigs, SIGFPE); 1370 1371 if (isJVM1available) { 1372 os::Solaris::set_SIGinterrupt(SIGJVM1); 1373 os::Solaris::set_SIGasync(SIGJVM2); 1374 } else if (UseAltSigs) { 1375 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1376 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1377 } else { 1378 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1379 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1380 } 1381 1382 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1383 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1384 1385 if (!ReduceSignalUsage) { 1386 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1387 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1388 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1389 } 1390 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1391 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1392 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1393 } 1394 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1395 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1396 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1397 } 1398 } 1399 // Fill in signals that are blocked by all but the VM thread. 1400 sigemptyset(&vm_sigs); 1401 if (!ReduceSignalUsage) 1402 sigaddset(&vm_sigs, BREAK_SIGNAL); 1403 debug_only(signal_sets_initialized = true); 1404 1405 // For diagnostics only used in run_periodic_checks 1406 sigemptyset(&check_signal_done); 1407} 1408 1409// These are signals that are unblocked while a thread is running Java. 1410// (For some reason, they get blocked by default.) 1411sigset_t* os::Solaris::unblocked_signals() { 1412 assert(signal_sets_initialized, "Not initialized"); 1413 return &unblocked_sigs; 1414} 1415 1416// These are the signals that are blocked while a (non-VM) thread is 1417// running Java. Only the VM thread handles these signals. 1418sigset_t* os::Solaris::vm_signals() { 1419 assert(signal_sets_initialized, "Not initialized"); 1420 return &vm_sigs; 1421} 1422 1423// These are signals that are blocked during cond_wait to allow debugger in 1424sigset_t* os::Solaris::allowdebug_blocked_signals() { 1425 assert(signal_sets_initialized, "Not initialized"); 1426 return &allowdebug_blocked_sigs; 1427} 1428 1429// First crack at OS-specific initialization, from inside the new thread. 1430void os::initialize_thread() { 1431 int r = thr_main() ; 1432 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1433 if (r) { 1434 JavaThread* jt = (JavaThread *)Thread::current(); 1435 assert(jt != NULL,"Sanity check"); 1436 size_t stack_size; 1437 address base = jt->stack_base(); 1438 if (Arguments::created_by_java_launcher()) { 1439 // Use 2MB to allow for Solaris 7 64 bit mode. 1440 stack_size = JavaThread::stack_size_at_create() == 0 1441 ? 2048*K : JavaThread::stack_size_at_create(); 1442 1443 // There are rare cases when we may have already used more than 1444 // the basic stack size allotment before this method is invoked. 1445 // Attempt to allow for a normally sized java_stack. 1446 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1447 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1448 } else { 1449 // 6269555: If we were not created by a Java launcher, i.e. if we are 1450 // running embedded in a native application, treat the primordial thread 1451 // as much like a native attached thread as possible. This means using 1452 // the current stack size from thr_stksegment(), unless it is too large 1453 // to reliably setup guard pages. A reasonable max size is 8MB. 1454 size_t current_size = current_stack_size(); 1455 // This should never happen, but just in case.... 1456 if (current_size == 0) current_size = 2 * K * K; 1457 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1458 } 1459 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1460 stack_size = (size_t)(base - bottom); 1461 1462 assert(stack_size > 0, "Stack size calculation problem"); 1463 1464 if (stack_size > jt->stack_size()) { 1465 NOT_PRODUCT( 1466 struct rlimit limits; 1467 getrlimit(RLIMIT_STACK, &limits); 1468 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1469 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1470 ) 1471 tty->print_cr( 1472 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1473 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1474 "See limit(1) to increase the stack size limit.", 1475 stack_size / K, jt->stack_size() / K); 1476 vm_exit(1); 1477 } 1478 assert(jt->stack_size() >= stack_size, 1479 "Attempt to map more stack than was allocated"); 1480 jt->set_stack_size(stack_size); 1481 } 1482 1483 // 5/22/01: Right now alternate signal stacks do not handle 1484 // throwing stack overflow exceptions, see bug 4463178 1485 // Until a fix is found for this, T2 will NOT imply alternate signal 1486 // stacks. 1487 // If using T2 libthread threads, install an alternate signal stack. 1488 // Because alternate stacks associate with LWPs on Solaris, 1489 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1490 // we prefer to explicitly stack bang. 1491 // If not using T2 libthread, but using UseBoundThreads any threads 1492 // (primordial thread, jni_attachCurrentThread) we do not create, 1493 // probably are not bound, therefore they can not have an alternate 1494 // signal stack. Since our stack banging code is generated and 1495 // is shared across threads, all threads must be bound to allow 1496 // using alternate signal stacks. The alternative is to interpose 1497 // on _lwp_create to associate an alt sig stack with each LWP, 1498 // and this could be a problem when the JVM is embedded. 1499 // We would prefer to use alternate signal stacks with T2 1500 // Since there is currently no accurate way to detect T2 1501 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1502 // on installing alternate signal stacks 1503 1504 1505 // 05/09/03: removed alternate signal stack support for Solaris 1506 // The alternate signal stack mechanism is no longer needed to 1507 // handle stack overflow. This is now handled by allocating 1508 // guard pages (red zone) and stackbanging. 1509 // Initially the alternate signal stack mechanism was removed because 1510 // it did not work with T1 llibthread. Alternate 1511 // signal stacks MUST have all threads bound to lwps. Applications 1512 // can create their own threads and attach them without their being 1513 // bound under T1. This is frequently the case for the primordial thread. 1514 // If we were ever to reenable this mechanism we would need to 1515 // use the dynamic check for T2 libthread. 1516 1517 os::Solaris::init_thread_fpu_state(); 1518} 1519 1520 1521 1522// Free Solaris resources related to the OSThread 1523void os::free_thread(OSThread* osthread) { 1524 assert(osthread != NULL, "os::free_thread but osthread not set"); 1525 1526 1527 // We are told to free resources of the argument thread, 1528 // but we can only really operate on the current thread. 1529 // The main thread must take the VMThread down synchronously 1530 // before the main thread exits and frees up CodeHeap 1531 guarantee((Thread::current()->osthread() == osthread 1532 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1533 if (Thread::current()->osthread() == osthread) { 1534 // Restore caller's signal mask 1535 sigset_t sigmask = osthread->caller_sigmask(); 1536 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1537 } 1538 delete osthread; 1539} 1540 1541void os::pd_start_thread(Thread* thread) { 1542 int status = thr_continue(thread->osthread()->thread_id()); 1543 assert_status(status == 0, status, "thr_continue failed"); 1544} 1545 1546 1547intx os::current_thread_id() { 1548 return (intx)thr_self(); 1549} 1550 1551static pid_t _initial_pid = 0; 1552 1553int os::current_process_id() { 1554 return (int)(_initial_pid ? _initial_pid : getpid()); 1555} 1556 1557int os::allocate_thread_local_storage() { 1558 // %%% in Win32 this allocates a memory segment pointed to by a 1559 // register. Dan Stein can implement a similar feature in 1560 // Solaris. Alternatively, the VM can do the same thing 1561 // explicitly: malloc some storage and keep the pointer in a 1562 // register (which is part of the thread's context) (or keep it 1563 // in TLS). 1564 // %%% In current versions of Solaris, thr_self and TSD can 1565 // be accessed via short sequences of displaced indirections. 1566 // The value of thr_self is available as %g7(36). 1567 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1568 // assuming that the current thread already has a value bound to k. 1569 // It may be worth experimenting with such access patterns, 1570 // and later having the parameters formally exported from a Solaris 1571 // interface. I think, however, that it will be faster to 1572 // maintain the invariant that %g2 always contains the 1573 // JavaThread in Java code, and have stubs simply 1574 // treat %g2 as a caller-save register, preserving it in a %lN. 1575 thread_key_t tk; 1576 if (thr_keycreate( &tk, NULL ) ) 1577 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1578 return int(tk); 1579} 1580 1581void os::free_thread_local_storage(int index) { 1582 // %%% don't think we need anything here 1583 // if ( pthread_key_delete((pthread_key_t) tk) ) 1584 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1585} 1586 1587#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1588 // small number - point is NO swap space available 1589void os::thread_local_storage_at_put(int index, void* value) { 1590 // %%% this is used only in threadLocalStorage.cpp 1591 if (thr_setspecific((thread_key_t)index, value)) { 1592 if (errno == ENOMEM) { 1593 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1594 } else { 1595 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1596 } 1597 } else { 1598 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1599 } 1600} 1601 1602// This function could be called before TLS is initialized, for example, when 1603// VM receives an async signal or when VM causes a fatal error during 1604// initialization. Return NULL if thr_getspecific() fails. 1605void* os::thread_local_storage_at(int index) { 1606 // %%% this is used only in threadLocalStorage.cpp 1607 void* r = NULL; 1608 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1609} 1610 1611 1612const int NANOSECS_PER_MILLISECS = 1000000; 1613// gethrtime can move backwards if read from one cpu and then a different cpu 1614// getTimeNanos is guaranteed to not move backward on Solaris 1615// local spinloop created as faster for a CAS on an int than 1616// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1617// supported on sparc v8 or pre supports_cx8 intel boxes. 1618// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1619// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1620inline hrtime_t oldgetTimeNanos() { 1621 int gotlock = LOCK_INVALID; 1622 hrtime_t newtime = gethrtime(); 1623 1624 for (;;) { 1625// grab lock for max_hrtime 1626 int curlock = max_hrtime_lock; 1627 if (curlock & LOCK_BUSY) continue; 1628 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1629 if (newtime > max_hrtime) { 1630 max_hrtime = newtime; 1631 } else { 1632 newtime = max_hrtime; 1633 } 1634 // release lock 1635 max_hrtime_lock = LOCK_FREE; 1636 return newtime; 1637 } 1638} 1639// gethrtime can move backwards if read from one cpu and then a different cpu 1640// getTimeNanos is guaranteed to not move backward on Solaris 1641inline hrtime_t getTimeNanos() { 1642 if (VM_Version::supports_cx8()) { 1643 bool retry = false; 1644 hrtime_t newtime = gethrtime(); 1645 hrtime_t oldmaxtime = max_hrtime; 1646 hrtime_t retmaxtime = oldmaxtime; 1647 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1648 oldmaxtime = retmaxtime; 1649 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1650 retry = true; 1651 } 1652 return (newtime > retmaxtime) ? newtime : retmaxtime; 1653 } else { 1654 return oldgetTimeNanos(); 1655 } 1656} 1657 1658// Time since start-up in seconds to a fine granularity. 1659// Used by VMSelfDestructTimer and the MemProfiler. 1660double os::elapsedTime() { 1661 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1662} 1663 1664jlong os::elapsed_counter() { 1665 return (jlong)(getTimeNanos() - first_hrtime); 1666} 1667 1668jlong os::elapsed_frequency() { 1669 return hrtime_hz; 1670} 1671 1672// Return the real, user, and system times in seconds from an 1673// arbitrary fixed point in the past. 1674bool os::getTimesSecs(double* process_real_time, 1675 double* process_user_time, 1676 double* process_system_time) { 1677 struct tms ticks; 1678 clock_t real_ticks = times(&ticks); 1679 1680 if (real_ticks == (clock_t) (-1)) { 1681 return false; 1682 } else { 1683 double ticks_per_second = (double) clock_tics_per_sec; 1684 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1685 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1686 // For consistency return the real time from getTimeNanos() 1687 // converted to seconds. 1688 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1689 1690 return true; 1691 } 1692} 1693 1694// Used internally for comparisons only 1695// getTimeMillis guaranteed to not move backwards on Solaris 1696jlong getTimeMillis() { 1697 jlong nanotime = getTimeNanos(); 1698 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1699} 1700 1701// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1702jlong os::javaTimeMillis() { 1703 timeval t; 1704 if (gettimeofday( &t, NULL) == -1) 1705 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1706 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1707} 1708 1709jlong os::javaTimeNanos() { 1710 return (jlong)getTimeNanos(); 1711} 1712 1713void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1714 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1715 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1716 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1717 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1718} 1719 1720char * os::local_time_string(char *buf, size_t buflen) { 1721 struct tm t; 1722 time_t long_time; 1723 time(&long_time); 1724 localtime_r(&long_time, &t); 1725 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1726 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1727 t.tm_hour, t.tm_min, t.tm_sec); 1728 return buf; 1729} 1730 1731// Note: os::shutdown() might be called very early during initialization, or 1732// called from signal handler. Before adding something to os::shutdown(), make 1733// sure it is async-safe and can handle partially initialized VM. 1734void os::shutdown() { 1735 1736 // allow PerfMemory to attempt cleanup of any persistent resources 1737 perfMemory_exit(); 1738 1739 // needs to remove object in file system 1740 AttachListener::abort(); 1741 1742 // flush buffered output, finish log files 1743 ostream_abort(); 1744 1745 // Check for abort hook 1746 abort_hook_t abort_hook = Arguments::abort_hook(); 1747 if (abort_hook != NULL) { 1748 abort_hook(); 1749 } 1750} 1751 1752// Note: os::abort() might be called very early during initialization, or 1753// called from signal handler. Before adding something to os::abort(), make 1754// sure it is async-safe and can handle partially initialized VM. 1755void os::abort(bool dump_core) { 1756 os::shutdown(); 1757 if (dump_core) { 1758#ifndef PRODUCT 1759 fdStream out(defaultStream::output_fd()); 1760 out.print_raw("Current thread is "); 1761 char buf[16]; 1762 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1763 out.print_raw_cr(buf); 1764 out.print_raw_cr("Dumping core ..."); 1765#endif 1766 ::abort(); // dump core (for debugging) 1767 } 1768 1769 ::exit(1); 1770} 1771 1772// Die immediately, no exit hook, no abort hook, no cleanup. 1773void os::die() { 1774 _exit(-1); 1775} 1776 1777// unused 1778void os::set_error_file(const char *logfile) {} 1779 1780// DLL functions 1781 1782const char* os::dll_file_extension() { return ".so"; } 1783 1784const char* os::get_temp_directory() { return "/tmp/"; } 1785 1786void os::dll_build_name( 1787 char* buffer, size_t buflen, const char* pname, const char* fname) { 1788 // copied from libhpi 1789 const size_t pnamelen = pname ? strlen(pname) : 0; 1790 1791 /* Quietly truncate on buffer overflow. Should be an error. */ 1792 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1793 *buffer = '\0'; 1794 return; 1795 } 1796 1797 if (pnamelen == 0) { 1798 sprintf(buffer, "lib%s.so", fname); 1799 } else { 1800 sprintf(buffer, "%s/lib%s.so", pname, fname); 1801 } 1802} 1803 1804const char* os::get_current_directory(char *buf, int buflen) { 1805 return getcwd(buf, buflen); 1806} 1807 1808// check if addr is inside libjvm[_g].so 1809bool os::address_is_in_vm(address addr) { 1810 static address libjvm_base_addr; 1811 Dl_info dlinfo; 1812 1813 if (libjvm_base_addr == NULL) { 1814 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1815 libjvm_base_addr = (address)dlinfo.dli_fbase; 1816 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1817 } 1818 1819 if (dladdr((void *)addr, &dlinfo)) { 1820 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1821 } 1822 1823 return false; 1824} 1825 1826typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1827static dladdr1_func_type dladdr1_func = NULL; 1828 1829bool os::dll_address_to_function_name(address addr, char *buf, 1830 int buflen, int * offset) { 1831 Dl_info dlinfo; 1832 1833 // dladdr1_func was initialized in os::init() 1834 if (dladdr1_func){ 1835 // yes, we have dladdr1 1836 1837 // Support for dladdr1 is checked at runtime; it may be 1838 // available even if the vm is built on a machine that does 1839 // not have dladdr1 support. Make sure there is a value for 1840 // RTLD_DL_SYMENT. 1841 #ifndef RTLD_DL_SYMENT 1842 #define RTLD_DL_SYMENT 1 1843 #endif 1844 Sym * info; 1845 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1846 RTLD_DL_SYMENT)) { 1847 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1848 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1849 1850 // check if the returned symbol really covers addr 1851 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1852 } else { 1853 if (buf) buf[0] = '\0'; 1854 if (offset) *offset = -1; 1855 return false; 1856 } 1857 } else { 1858 // no, only dladdr is available 1859 if(dladdr((void *)addr, &dlinfo)) { 1860 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1861 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1862 return true; 1863 } else { 1864 if (buf) buf[0] = '\0'; 1865 if (offset) *offset = -1; 1866 return false; 1867 } 1868 } 1869} 1870 1871bool os::dll_address_to_library_name(address addr, char* buf, 1872 int buflen, int* offset) { 1873 Dl_info dlinfo; 1874 1875 if (dladdr((void*)addr, &dlinfo)){ 1876 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1877 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1878 return true; 1879 } else { 1880 if (buf) buf[0] = '\0'; 1881 if (offset) *offset = -1; 1882 return false; 1883 } 1884} 1885 1886// Prints the names and full paths of all opened dynamic libraries 1887// for current process 1888void os::print_dll_info(outputStream * st) { 1889 Dl_info dli; 1890 void *handle; 1891 Link_map *map; 1892 Link_map *p; 1893 1894 st->print_cr("Dynamic libraries:"); st->flush(); 1895 1896 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1897 st->print_cr("Error: Cannot print dynamic libraries."); 1898 return; 1899 } 1900 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1901 if (handle == NULL) { 1902 st->print_cr("Error: Cannot print dynamic libraries."); 1903 return; 1904 } 1905 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1906 if (map == NULL) { 1907 st->print_cr("Error: Cannot print dynamic libraries."); 1908 return; 1909 } 1910 1911 while (map->l_prev != NULL) 1912 map = map->l_prev; 1913 1914 while (map != NULL) { 1915 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1916 map = map->l_next; 1917 } 1918 1919 dlclose(handle); 1920} 1921 1922 // Loads .dll/.so and 1923 // in case of error it checks if .dll/.so was built for the 1924 // same architecture as Hotspot is running on 1925 1926void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1927{ 1928 void * result= ::dlopen(filename, RTLD_LAZY); 1929 if (result != NULL) { 1930 // Successful loading 1931 return result; 1932 } 1933 1934 Elf32_Ehdr elf_head; 1935 1936 // Read system error message into ebuf 1937 // It may or may not be overwritten below 1938 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1939 ebuf[ebuflen-1]='\0'; 1940 int diag_msg_max_length=ebuflen-strlen(ebuf); 1941 char* diag_msg_buf=ebuf+strlen(ebuf); 1942 1943 if (diag_msg_max_length==0) { 1944 // No more space in ebuf for additional diagnostics message 1945 return NULL; 1946 } 1947 1948 1949 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1950 1951 if (file_descriptor < 0) { 1952 // Can't open library, report dlerror() message 1953 return NULL; 1954 } 1955 1956 bool failed_to_read_elf_head= 1957 (sizeof(elf_head)!= 1958 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1959 1960 ::close(file_descriptor); 1961 if (failed_to_read_elf_head) { 1962 // file i/o error - report dlerror() msg 1963 return NULL; 1964 } 1965 1966 typedef struct { 1967 Elf32_Half code; // Actual value as defined in elf.h 1968 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1969 char elf_class; // 32 or 64 bit 1970 char endianess; // MSB or LSB 1971 char* name; // String representation 1972 } arch_t; 1973 1974 static const arch_t arch_array[]={ 1975 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1976 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1977 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1978 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1979 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1980 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1981 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1982 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1983 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 1984 }; 1985 1986 #if (defined IA32) 1987 static Elf32_Half running_arch_code=EM_386; 1988 #elif (defined AMD64) 1989 static Elf32_Half running_arch_code=EM_X86_64; 1990 #elif (defined IA64) 1991 static Elf32_Half running_arch_code=EM_IA_64; 1992 #elif (defined __sparc) && (defined _LP64) 1993 static Elf32_Half running_arch_code=EM_SPARCV9; 1994 #elif (defined __sparc) && (!defined _LP64) 1995 static Elf32_Half running_arch_code=EM_SPARC; 1996 #elif (defined __powerpc64__) 1997 static Elf32_Half running_arch_code=EM_PPC64; 1998 #elif (defined __powerpc__) 1999 static Elf32_Half running_arch_code=EM_PPC; 2000 #else 2001 #error Method os::dll_load requires that one of following is defined:\ 2002 IA32, AMD64, IA64, __sparc, __powerpc__ 2003 #endif 2004 2005 // Identify compatability class for VM's architecture and library's architecture 2006 // Obtain string descriptions for architectures 2007 2008 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 2009 int running_arch_index=-1; 2010 2011 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 2012 if (running_arch_code == arch_array[i].code) { 2013 running_arch_index = i; 2014 } 2015 if (lib_arch.code == arch_array[i].code) { 2016 lib_arch.compat_class = arch_array[i].compat_class; 2017 lib_arch.name = arch_array[i].name; 2018 } 2019 } 2020 2021 assert(running_arch_index != -1, 2022 "Didn't find running architecture code (running_arch_code) in arch_array"); 2023 if (running_arch_index == -1) { 2024 // Even though running architecture detection failed 2025 // we may still continue with reporting dlerror() message 2026 return NULL; 2027 } 2028 2029 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2030 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2031 return NULL; 2032 } 2033 2034 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2035 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2036 return NULL; 2037 } 2038 2039 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2040 if ( lib_arch.name!=NULL ) { 2041 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2042 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2043 lib_arch.name, arch_array[running_arch_index].name); 2044 } else { 2045 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2046 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2047 lib_arch.code, 2048 arch_array[running_arch_index].name); 2049 } 2050 } 2051 2052 return NULL; 2053} 2054 2055void* os::dll_lookup(void* handle, const char* name) { 2056 return dlsym(handle, name); 2057} 2058 2059 2060bool _print_ascii_file(const char* filename, outputStream* st) { 2061 int fd = open(filename, O_RDONLY); 2062 if (fd == -1) { 2063 return false; 2064 } 2065 2066 char buf[32]; 2067 int bytes; 2068 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2069 st->print_raw(buf, bytes); 2070 } 2071 2072 close(fd); 2073 2074 return true; 2075} 2076 2077void os::print_os_info(outputStream* st) { 2078 st->print("OS:"); 2079 2080 if (!_print_ascii_file("/etc/release", st)) { 2081 st->print("Solaris"); 2082 } 2083 st->cr(); 2084 2085 // kernel 2086 st->print("uname:"); 2087 struct utsname name; 2088 uname(&name); 2089 st->print(name.sysname); st->print(" "); 2090 st->print(name.release); st->print(" "); 2091 st->print(name.version); st->print(" "); 2092 st->print(name.machine); 2093 2094 // libthread 2095 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2096 else st->print(" (T1 libthread)"); 2097 st->cr(); 2098 2099 // rlimit 2100 st->print("rlimit:"); 2101 struct rlimit rlim; 2102 2103 st->print(" STACK "); 2104 getrlimit(RLIMIT_STACK, &rlim); 2105 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2106 else st->print("%uk", rlim.rlim_cur >> 10); 2107 2108 st->print(", CORE "); 2109 getrlimit(RLIMIT_CORE, &rlim); 2110 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2111 else st->print("%uk", rlim.rlim_cur >> 10); 2112 2113 st->print(", NOFILE "); 2114 getrlimit(RLIMIT_NOFILE, &rlim); 2115 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2116 else st->print("%d", rlim.rlim_cur); 2117 2118 st->print(", AS "); 2119 getrlimit(RLIMIT_AS, &rlim); 2120 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2121 else st->print("%uk", rlim.rlim_cur >> 10); 2122 st->cr(); 2123 2124 // load average 2125 st->print("load average:"); 2126 double loadavg[3]; 2127 os::loadavg(loadavg, 3); 2128 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2129 st->cr(); 2130} 2131 2132 2133static bool check_addr0(outputStream* st) { 2134 jboolean status = false; 2135 int fd = open("/proc/self/map",O_RDONLY); 2136 if (fd >= 0) { 2137 prmap_t p; 2138 while(read(fd, &p, sizeof(p)) > 0) { 2139 if (p.pr_vaddr == 0x0) { 2140 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2141 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2142 st->print("Access:"); 2143 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2144 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2145 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2146 st->cr(); 2147 status = true; 2148 } 2149 close(fd); 2150 } 2151 } 2152 return status; 2153} 2154 2155void os::print_memory_info(outputStream* st) { 2156 st->print("Memory:"); 2157 st->print(" %dk page", os::vm_page_size()>>10); 2158 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2159 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2160 st->cr(); 2161 (void) check_addr0(st); 2162} 2163 2164// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2165// but they're the same for all the solaris architectures that we support. 2166const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2167 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2168 "ILL_COPROC", "ILL_BADSTK" }; 2169 2170const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2171 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2172 "FPE_FLTINV", "FPE_FLTSUB" }; 2173 2174const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2175 2176const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2177 2178void os::print_siginfo(outputStream* st, void* siginfo) { 2179 st->print("siginfo:"); 2180 2181 const int buflen = 100; 2182 char buf[buflen]; 2183 siginfo_t *si = (siginfo_t*)siginfo; 2184 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2185 char *err = strerror(si->si_errno); 2186 if (si->si_errno != 0 && err != NULL) { 2187 st->print("si_errno=%s", err); 2188 } else { 2189 st->print("si_errno=%d", si->si_errno); 2190 } 2191 const int c = si->si_code; 2192 assert(c > 0, "unexpected si_code"); 2193 switch (si->si_signo) { 2194 case SIGILL: 2195 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2196 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2197 break; 2198 case SIGFPE: 2199 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2200 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2201 break; 2202 case SIGSEGV: 2203 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2204 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2205 break; 2206 case SIGBUS: 2207 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2208 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2209 break; 2210 default: 2211 st->print(", si_code=%d", si->si_code); 2212 // no si_addr 2213 } 2214 2215 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2216 UseSharedSpaces) { 2217 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2218 if (mapinfo->is_in_shared_space(si->si_addr)) { 2219 st->print("\n\nError accessing class data sharing archive." \ 2220 " Mapped file inaccessible during execution, " \ 2221 " possible disk/network problem."); 2222 } 2223 } 2224 st->cr(); 2225} 2226 2227// Moved from whole group, because we need them here for diagnostic 2228// prints. 2229#define OLDMAXSIGNUM 32 2230static int Maxsignum = 0; 2231static int *ourSigFlags = NULL; 2232 2233extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2234 2235int os::Solaris::get_our_sigflags(int sig) { 2236 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2237 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2238 return ourSigFlags[sig]; 2239} 2240 2241void os::Solaris::set_our_sigflags(int sig, int flags) { 2242 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2243 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2244 ourSigFlags[sig] = flags; 2245} 2246 2247 2248static const char* get_signal_handler_name(address handler, 2249 char* buf, int buflen) { 2250 int offset; 2251 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2252 if (found) { 2253 // skip directory names 2254 const char *p1, *p2; 2255 p1 = buf; 2256 size_t len = strlen(os::file_separator()); 2257 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2258 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2259 } else { 2260 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2261 } 2262 return buf; 2263} 2264 2265static void print_signal_handler(outputStream* st, int sig, 2266 char* buf, size_t buflen) { 2267 struct sigaction sa; 2268 2269 sigaction(sig, NULL, &sa); 2270 2271 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2272 2273 address handler = (sa.sa_flags & SA_SIGINFO) 2274 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2275 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2276 2277 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2278 st->print("SIG_DFL"); 2279 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2280 st->print("SIG_IGN"); 2281 } else { 2282 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2283 } 2284 2285 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2286 2287 address rh = VMError::get_resetted_sighandler(sig); 2288 // May be, handler was resetted by VMError? 2289 if(rh != NULL) { 2290 handler = rh; 2291 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2292 } 2293 2294 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2295 2296 // Check: is it our handler? 2297 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2298 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2299 // It is our signal handler 2300 // check for flags 2301 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2302 st->print( 2303 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2304 os::Solaris::get_our_sigflags(sig)); 2305 } 2306 } 2307 st->cr(); 2308} 2309 2310void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2311 st->print_cr("Signal Handlers:"); 2312 print_signal_handler(st, SIGSEGV, buf, buflen); 2313 print_signal_handler(st, SIGBUS , buf, buflen); 2314 print_signal_handler(st, SIGFPE , buf, buflen); 2315 print_signal_handler(st, SIGPIPE, buf, buflen); 2316 print_signal_handler(st, SIGXFSZ, buf, buflen); 2317 print_signal_handler(st, SIGILL , buf, buflen); 2318 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2319 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2320 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2321 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2322 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2323 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2324 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2325 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2326} 2327 2328static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2329 2330// Find the full path to the current module, libjvm.so or libjvm_g.so 2331void os::jvm_path(char *buf, jint buflen) { 2332 // Error checking. 2333 if (buflen < MAXPATHLEN) { 2334 assert(false, "must use a large-enough buffer"); 2335 buf[0] = '\0'; 2336 return; 2337 } 2338 // Lazy resolve the path to current module. 2339 if (saved_jvm_path[0] != 0) { 2340 strcpy(buf, saved_jvm_path); 2341 return; 2342 } 2343 2344 Dl_info dlinfo; 2345 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2346 assert(ret != 0, "cannot locate libjvm"); 2347 realpath((char *)dlinfo.dli_fname, buf); 2348 2349 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2350 // Support for the gamma launcher. Typical value for buf is 2351 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2352 // the right place in the string, then assume we are installed in a JDK and 2353 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2354 // up the path so it looks like libjvm.so is installed there (append a 2355 // fake suffix hotspot/libjvm.so). 2356 const char *p = buf + strlen(buf) - 1; 2357 for (int count = 0; p > buf && count < 5; ++count) { 2358 for (--p; p > buf && *p != '/'; --p) 2359 /* empty */ ; 2360 } 2361 2362 if (strncmp(p, "/jre/lib/", 9) != 0) { 2363 // Look for JAVA_HOME in the environment. 2364 char* java_home_var = ::getenv("JAVA_HOME"); 2365 if (java_home_var != NULL && java_home_var[0] != 0) { 2366 char cpu_arch[12]; 2367 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2368#ifdef _LP64 2369 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2370 if (strcmp(cpu_arch, "sparc") == 0) { 2371 strcat(cpu_arch, "v9"); 2372 } else if (strcmp(cpu_arch, "i386") == 0) { 2373 strcpy(cpu_arch, "amd64"); 2374 } 2375#endif 2376 // Check the current module name "libjvm.so" or "libjvm_g.so". 2377 p = strrchr(buf, '/'); 2378 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2379 p = strstr(p, "_g") ? "_g" : ""; 2380 2381 realpath(java_home_var, buf); 2382 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2383 if (0 == access(buf, F_OK)) { 2384 // Use current module name "libjvm[_g].so" instead of 2385 // "libjvm"debug_only("_g")".so" since for fastdebug version 2386 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2387 // It is used when we are choosing the HPI library's name 2388 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2389 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2390 } else { 2391 // Go back to path of .so 2392 realpath((char *)dlinfo.dli_fname, buf); 2393 } 2394 } 2395 } 2396 } 2397 2398 strcpy(saved_jvm_path, buf); 2399} 2400 2401 2402void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2403 // no prefix required, not even "_" 2404} 2405 2406 2407void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2408 // no suffix required 2409} 2410 2411 2412// sun.misc.Signal 2413 2414extern "C" { 2415 static void UserHandler(int sig, void *siginfo, void *context) { 2416 // Ctrl-C is pressed during error reporting, likely because the error 2417 // handler fails to abort. Let VM die immediately. 2418 if (sig == SIGINT && is_error_reported()) { 2419 os::die(); 2420 } 2421 2422 os::signal_notify(sig); 2423 // We do not need to reinstate the signal handler each time... 2424 } 2425} 2426 2427void* os::user_handler() { 2428 return CAST_FROM_FN_PTR(void*, UserHandler); 2429} 2430 2431extern "C" { 2432 typedef void (*sa_handler_t)(int); 2433 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2434} 2435 2436void* os::signal(int signal_number, void* handler) { 2437 struct sigaction sigAct, oldSigAct; 2438 sigfillset(&(sigAct.sa_mask)); 2439 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2440 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2441 2442 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2443 // -1 means registration failed 2444 return (void *)-1; 2445 2446 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2447} 2448 2449void os::signal_raise(int signal_number) { 2450 raise(signal_number); 2451} 2452 2453/* 2454 * The following code is moved from os.cpp for making this 2455 * code platform specific, which it is by its very nature. 2456 */ 2457 2458// a counter for each possible signal value 2459static int Sigexit = 0; 2460static int Maxlibjsigsigs; 2461static jint *pending_signals = NULL; 2462static int *preinstalled_sigs = NULL; 2463static struct sigaction *chainedsigactions = NULL; 2464static sema_t sig_sem; 2465typedef int (*version_getting_t)(); 2466version_getting_t os::Solaris::get_libjsig_version = NULL; 2467static int libjsigversion = NULL; 2468 2469int os::sigexitnum_pd() { 2470 assert(Sigexit > 0, "signal memory not yet initialized"); 2471 return Sigexit; 2472} 2473 2474void os::Solaris::init_signal_mem() { 2475 // Initialize signal structures 2476 Maxsignum = SIGRTMAX; 2477 Sigexit = Maxsignum+1; 2478 assert(Maxsignum >0, "Unable to obtain max signal number"); 2479 2480 Maxlibjsigsigs = Maxsignum; 2481 2482 // pending_signals has one int per signal 2483 // The additional signal is for SIGEXIT - exit signal to signal_thread 2484 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2485 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2486 2487 if (UseSignalChaining) { 2488 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2489 * (Maxsignum + 1)); 2490 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2491 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2492 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2493 } 2494 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2495 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2496} 2497 2498void os::signal_init_pd() { 2499 int ret; 2500 2501 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2502 assert(ret == 0, "sema_init() failed"); 2503} 2504 2505void os::signal_notify(int signal_number) { 2506 int ret; 2507 2508 Atomic::inc(&pending_signals[signal_number]); 2509 ret = ::sema_post(&sig_sem); 2510 assert(ret == 0, "sema_post() failed"); 2511} 2512 2513static int check_pending_signals(bool wait_for_signal) { 2514 int ret; 2515 while (true) { 2516 for (int i = 0; i < Sigexit + 1; i++) { 2517 jint n = pending_signals[i]; 2518 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2519 return i; 2520 } 2521 } 2522 if (!wait_for_signal) { 2523 return -1; 2524 } 2525 JavaThread *thread = JavaThread::current(); 2526 ThreadBlockInVM tbivm(thread); 2527 2528 bool threadIsSuspended; 2529 do { 2530 thread->set_suspend_equivalent(); 2531 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2532 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2533 ; 2534 assert(ret == 0, "sema_wait() failed"); 2535 2536 // were we externally suspended while we were waiting? 2537 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2538 if (threadIsSuspended) { 2539 // 2540 // The semaphore has been incremented, but while we were waiting 2541 // another thread suspended us. We don't want to continue running 2542 // while suspended because that would surprise the thread that 2543 // suspended us. 2544 // 2545 ret = ::sema_post(&sig_sem); 2546 assert(ret == 0, "sema_post() failed"); 2547 2548 thread->java_suspend_self(); 2549 } 2550 } while (threadIsSuspended); 2551 } 2552} 2553 2554int os::signal_lookup() { 2555 return check_pending_signals(false); 2556} 2557 2558int os::signal_wait() { 2559 return check_pending_signals(true); 2560} 2561 2562//////////////////////////////////////////////////////////////////////////////// 2563// Virtual Memory 2564 2565static int page_size = -1; 2566 2567// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2568// clear this var if support is not available. 2569static bool has_map_align = true; 2570 2571int os::vm_page_size() { 2572 assert(page_size != -1, "must call os::init"); 2573 return page_size; 2574} 2575 2576// Solaris allocates memory by pages. 2577int os::vm_allocation_granularity() { 2578 assert(page_size != -1, "must call os::init"); 2579 return page_size; 2580} 2581 2582bool os::commit_memory(char* addr, size_t bytes) { 2583 size_t size = bytes; 2584 return 2585 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2586 PROT_READ | PROT_WRITE | PROT_EXEC); 2587} 2588 2589bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2590 if (commit_memory(addr, bytes)) { 2591 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2592 // If the large page size has been set and the VM 2593 // is using large pages, use the large page size 2594 // if it is smaller than the alignment hint. This is 2595 // a case where the VM wants to use a larger alignment size 2596 // for its own reasons but still want to use large pages 2597 // (which is what matters to setting the mpss range. 2598 size_t page_size = 0; 2599 if (large_page_size() < alignment_hint) { 2600 assert(UseLargePages, "Expected to be here for large page use only"); 2601 page_size = large_page_size(); 2602 } else { 2603 // If the alignment hint is less than the large page 2604 // size, the VM wants a particular alignment (thus the hint) 2605 // for internal reasons. Try to set the mpss range using 2606 // the alignment_hint. 2607 page_size = alignment_hint; 2608 } 2609 // Since this is a hint, ignore any failures. 2610 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2611 } 2612 return true; 2613 } 2614 return false; 2615} 2616 2617// Uncommit the pages in a specified region. 2618void os::free_memory(char* addr, size_t bytes) { 2619 if (madvise(addr, bytes, MADV_FREE) < 0) { 2620 debug_only(warning("MADV_FREE failed.")); 2621 return; 2622 } 2623} 2624 2625// Change the page size in a given range. 2626void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2627 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2628 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2629 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2630} 2631 2632// Tell the OS to make the range local to the first-touching LWP 2633void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2634 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2635 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2636 debug_only(warning("MADV_ACCESS_LWP failed.")); 2637 } 2638} 2639 2640// Tell the OS that this range would be accessed from different LWPs. 2641void os::numa_make_global(char *addr, size_t bytes) { 2642 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2643 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2644 debug_only(warning("MADV_ACCESS_MANY failed.")); 2645 } 2646} 2647 2648// Get the number of the locality groups. 2649size_t os::numa_get_groups_num() { 2650 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2651 return n != -1 ? n : 1; 2652} 2653 2654// Get a list of leaf locality groups. A leaf lgroup is group that 2655// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2656// board. An LWP is assigned to one of these groups upon creation. 2657size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2658 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2659 ids[0] = 0; 2660 return 1; 2661 } 2662 int result_size = 0, top = 1, bottom = 0, cur = 0; 2663 for (int k = 0; k < size; k++) { 2664 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2665 (Solaris::lgrp_id_t*)&ids[top], size - top); 2666 if (r == -1) { 2667 ids[0] = 0; 2668 return 1; 2669 } 2670 if (!r) { 2671 // That's a leaf node. 2672 assert (bottom <= cur, "Sanity check"); 2673 // Check if the node has memory 2674 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2675 NULL, 0, LGRP_RSRC_MEM) > 0) { 2676 ids[bottom++] = ids[cur]; 2677 } 2678 } 2679 top += r; 2680 cur++; 2681 } 2682 return bottom; 2683} 2684 2685// Detect the topology change. Typically happens during CPU pluggin-unplugging. 2686bool os::numa_topology_changed() { 2687 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2688 if (is_stale != -1 && is_stale) { 2689 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2690 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2691 assert(c != 0, "Failure to initialize LGRP API"); 2692 Solaris::set_lgrp_cookie(c); 2693 return true; 2694 } 2695 return false; 2696} 2697 2698// Get the group id of the current LWP. 2699int os::numa_get_group_id() { 2700 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2701 if (lgrp_id == -1) { 2702 return 0; 2703 } 2704 const int size = os::numa_get_groups_num(); 2705 int *ids = (int*)alloca(size * sizeof(int)); 2706 2707 // Get the ids of all lgroups with memory; r is the count. 2708 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2709 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2710 if (r <= 0) { 2711 return 0; 2712 } 2713 return ids[os::random() % r]; 2714} 2715 2716// Request information about the page. 2717bool os::get_page_info(char *start, page_info* info) { 2718 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2719 uint64_t addr = (uintptr_t)start; 2720 uint64_t outdata[2]; 2721 uint_t validity = 0; 2722 2723 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2724 return false; 2725 } 2726 2727 info->size = 0; 2728 info->lgrp_id = -1; 2729 2730 if ((validity & 1) != 0) { 2731 if ((validity & 2) != 0) { 2732 info->lgrp_id = outdata[0]; 2733 } 2734 if ((validity & 4) != 0) { 2735 info->size = outdata[1]; 2736 } 2737 return true; 2738 } 2739 return false; 2740} 2741 2742// Scan the pages from start to end until a page different than 2743// the one described in the info parameter is encountered. 2744char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2745 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2746 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2747 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2748 uint_t validity[MAX_MEMINFO_CNT]; 2749 2750 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2751 uint64_t p = (uint64_t)start; 2752 while (p < (uint64_t)end) { 2753 addrs[0] = p; 2754 size_t addrs_count = 1; 2755 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2756 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2757 addrs_count++; 2758 } 2759 2760 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2761 return NULL; 2762 } 2763 2764 size_t i = 0; 2765 for (; i < addrs_count; i++) { 2766 if ((validity[i] & 1) != 0) { 2767 if ((validity[i] & 4) != 0) { 2768 if (outdata[types * i + 1] != page_expected->size) { 2769 break; 2770 } 2771 } else 2772 if (page_expected->size != 0) { 2773 break; 2774 } 2775 2776 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2777 if (outdata[types * i] != page_expected->lgrp_id) { 2778 break; 2779 } 2780 } 2781 } else { 2782 return NULL; 2783 } 2784 } 2785 2786 if (i != addrs_count) { 2787 if ((validity[i] & 2) != 0) { 2788 page_found->lgrp_id = outdata[types * i]; 2789 } else { 2790 page_found->lgrp_id = -1; 2791 } 2792 if ((validity[i] & 4) != 0) { 2793 page_found->size = outdata[types * i + 1]; 2794 } else { 2795 page_found->size = 0; 2796 } 2797 return (char*)addrs[i]; 2798 } 2799 2800 p = addrs[addrs_count - 1] + page_size; 2801 } 2802 return end; 2803} 2804 2805bool os::uncommit_memory(char* addr, size_t bytes) { 2806 size_t size = bytes; 2807 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2808 // uncommitted page. Otherwise, the read/write might succeed if we 2809 // have enough swap space to back the physical page. 2810 return 2811 NULL != Solaris::mmap_chunk(addr, size, 2812 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2813 PROT_NONE); 2814} 2815 2816char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2817 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2818 2819 if (b == MAP_FAILED) { 2820 return NULL; 2821 } 2822 return b; 2823} 2824 2825char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2826 char* addr = requested_addr; 2827 int flags = MAP_PRIVATE | MAP_NORESERVE; 2828 2829 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2830 2831 if (fixed) { 2832 flags |= MAP_FIXED; 2833 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2834 flags |= MAP_ALIGN; 2835 addr = (char*) alignment_hint; 2836 } 2837 2838 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2839 // uncommitted page. Otherwise, the read/write might succeed if we 2840 // have enough swap space to back the physical page. 2841 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2842} 2843 2844char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2845 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2846 2847 guarantee(requested_addr == NULL || requested_addr == addr, 2848 "OS failed to return requested mmap address."); 2849 return addr; 2850} 2851 2852// Reserve memory at an arbitrary address, only if that area is 2853// available (and not reserved for something else). 2854 2855char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2856 const int max_tries = 10; 2857 char* base[max_tries]; 2858 size_t size[max_tries]; 2859 2860 // Solaris adds a gap between mmap'ed regions. The size of the gap 2861 // is dependent on the requested size and the MMU. Our initial gap 2862 // value here is just a guess and will be corrected later. 2863 bool had_top_overlap = false; 2864 bool have_adjusted_gap = false; 2865 size_t gap = 0x400000; 2866 2867 // Assert only that the size is a multiple of the page size, since 2868 // that's all that mmap requires, and since that's all we really know 2869 // about at this low abstraction level. If we need higher alignment, 2870 // we can either pass an alignment to this method or verify alignment 2871 // in one of the methods further up the call chain. See bug 5044738. 2872 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2873 2874 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2875 // Give it a try, if the kernel honors the hint we can return immediately. 2876 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2877 volatile int err = errno; 2878 if (addr == requested_addr) { 2879 return addr; 2880 } else if (addr != NULL) { 2881 unmap_memory(addr, bytes); 2882 } 2883 2884 if (PrintMiscellaneous && Verbose) { 2885 char buf[256]; 2886 buf[0] = '\0'; 2887 if (addr == NULL) { 2888 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2889 } 2890 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2891 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2892 "%s", bytes, requested_addr, addr, buf); 2893 } 2894 2895 // Address hint method didn't work. Fall back to the old method. 2896 // In theory, once SNV becomes our oldest supported platform, this 2897 // code will no longer be needed. 2898 // 2899 // Repeatedly allocate blocks until the block is allocated at the 2900 // right spot. Give up after max_tries. 2901 int i; 2902 for (i = 0; i < max_tries; ++i) { 2903 base[i] = reserve_memory(bytes); 2904 2905 if (base[i] != NULL) { 2906 // Is this the block we wanted? 2907 if (base[i] == requested_addr) { 2908 size[i] = bytes; 2909 break; 2910 } 2911 2912 // check that the gap value is right 2913 if (had_top_overlap && !have_adjusted_gap) { 2914 size_t actual_gap = base[i-1] - base[i] - bytes; 2915 if (gap != actual_gap) { 2916 // adjust the gap value and retry the last 2 allocations 2917 assert(i > 0, "gap adjustment code problem"); 2918 have_adjusted_gap = true; // adjust the gap only once, just in case 2919 gap = actual_gap; 2920 if (PrintMiscellaneous && Verbose) { 2921 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2922 } 2923 unmap_memory(base[i], bytes); 2924 unmap_memory(base[i-1], size[i-1]); 2925 i-=2; 2926 continue; 2927 } 2928 } 2929 2930 // Does this overlap the block we wanted? Give back the overlapped 2931 // parts and try again. 2932 // 2933 // There is still a bug in this code: if top_overlap == bytes, 2934 // the overlap is offset from requested region by the value of gap. 2935 // In this case giving back the overlapped part will not work, 2936 // because we'll give back the entire block at base[i] and 2937 // therefore the subsequent allocation will not generate a new gap. 2938 // This could be fixed with a new algorithm that used larger 2939 // or variable size chunks to find the requested region - 2940 // but such a change would introduce additional complications. 2941 // It's rare enough that the planets align for this bug, 2942 // so we'll just wait for a fix for 6204603/5003415 which 2943 // will provide a mmap flag to allow us to avoid this business. 2944 2945 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2946 if (top_overlap >= 0 && top_overlap < bytes) { 2947 had_top_overlap = true; 2948 unmap_memory(base[i], top_overlap); 2949 base[i] += top_overlap; 2950 size[i] = bytes - top_overlap; 2951 } else { 2952 size_t bottom_overlap = base[i] + bytes - requested_addr; 2953 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2954 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2955 warning("attempt_reserve_memory_at: possible alignment bug"); 2956 } 2957 unmap_memory(requested_addr, bottom_overlap); 2958 size[i] = bytes - bottom_overlap; 2959 } else { 2960 size[i] = bytes; 2961 } 2962 } 2963 } 2964 } 2965 2966 // Give back the unused reserved pieces. 2967 2968 for (int j = 0; j < i; ++j) { 2969 if (base[j] != NULL) { 2970 unmap_memory(base[j], size[j]); 2971 } 2972 } 2973 2974 return (i < max_tries) ? requested_addr : NULL; 2975} 2976 2977bool os::release_memory(char* addr, size_t bytes) { 2978 size_t size = bytes; 2979 return munmap(addr, size) == 0; 2980} 2981 2982static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2983 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2984 "addr must be page aligned"); 2985 int retVal = mprotect(addr, bytes, prot); 2986 return retVal == 0; 2987} 2988 2989// Protect memory (Used to pass readonly pages through 2990// JNI GetArray<type>Elements with empty arrays.) 2991bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2992 bool is_committed) { 2993 unsigned int p = 0; 2994 switch (prot) { 2995 case MEM_PROT_NONE: p = PROT_NONE; break; 2996 case MEM_PROT_READ: p = PROT_READ; break; 2997 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2998 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2999 default: 3000 ShouldNotReachHere(); 3001 } 3002 // is_committed is unused. 3003 return solaris_mprotect(addr, bytes, p); 3004} 3005 3006// guard_memory and unguard_memory only happens within stack guard pages. 3007// Since ISM pertains only to the heap, guard and unguard memory should not 3008/// happen with an ISM region. 3009bool os::guard_memory(char* addr, size_t bytes) { 3010 return solaris_mprotect(addr, bytes, PROT_NONE); 3011} 3012 3013bool os::unguard_memory(char* addr, size_t bytes) { 3014 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 3015} 3016 3017// Large page support 3018 3019// UseLargePages is the master flag to enable/disable large page memory. 3020// UseMPSS and UseISM are supported for compatibility reasons. Their combined 3021// effects can be described in the following table: 3022// 3023// UseLargePages UseMPSS UseISM 3024// false * * => UseLargePages is the master switch, turning 3025// it off will turn off both UseMPSS and 3026// UseISM. VM will not use large page memory 3027// regardless the settings of UseMPSS/UseISM. 3028// true false false => Unless future Solaris provides other 3029// mechanism to use large page memory, this 3030// combination is equivalent to -UseLargePages, 3031// VM will not use large page memory 3032// true true false => JVM will use MPSS for large page memory. 3033// This is the default behavior. 3034// true false true => JVM will use ISM for large page memory. 3035// true true true => JVM will use ISM if it is available. 3036// Otherwise, JVM will fall back to MPSS. 3037// Becaues ISM is now available on all 3038// supported Solaris versions, this combination 3039// is equivalent to +UseISM -UseMPSS. 3040 3041typedef int (*getpagesizes_func_type) (size_t[], int); 3042static size_t _large_page_size = 0; 3043 3044bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3045 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3046 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3047 // can support multiple page sizes. 3048 3049 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3050 // ISM is only recommended on old Solaris where there is no MPSS support. 3051 // Simply choose a conservative value as default. 3052 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3053 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3054 3055 // ISM is available on all supported Solaris versions 3056 return true; 3057} 3058 3059// Insertion sort for small arrays (descending order). 3060static void insertion_sort_descending(size_t* array, int len) { 3061 for (int i = 0; i < len; i++) { 3062 size_t val = array[i]; 3063 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3064 size_t tmp = array[key]; 3065 array[key] = array[key - 1]; 3066 array[key - 1] = tmp; 3067 } 3068 } 3069} 3070 3071bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3072 getpagesizes_func_type getpagesizes_func = 3073 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3074 if (getpagesizes_func == NULL) { 3075 if (warn) { 3076 warning("MPSS is not supported by the operating system."); 3077 } 3078 return false; 3079 } 3080 3081 const unsigned int usable_count = VM_Version::page_size_count(); 3082 if (usable_count == 1) { 3083 return false; 3084 } 3085 3086 // Fill the array of page sizes. 3087 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3088 assert(n > 0, "Solaris bug?"); 3089 if (n == page_sizes_max) { 3090 // Add a sentinel value (necessary only if the array was completely filled 3091 // since it is static (zeroed at initialization)). 3092 _page_sizes[--n] = 0; 3093 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3094 } 3095 assert(_page_sizes[n] == 0, "missing sentinel"); 3096 3097 if (n == 1) return false; // Only one page size available. 3098 3099 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3100 // select up to usable_count elements. First sort the array, find the first 3101 // acceptable value, then copy the usable sizes to the top of the array and 3102 // trim the rest. Make sure to include the default page size :-). 3103 // 3104 // A better policy could get rid of the 4M limit by taking the sizes of the 3105 // important VM memory regions (java heap and possibly the code cache) into 3106 // account. 3107 insertion_sort_descending(_page_sizes, n); 3108 const size_t size_limit = 3109 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3110 int beg; 3111 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3112 const int end = MIN2((int)usable_count, n) - 1; 3113 for (int cur = 0; cur < end; ++cur, ++beg) { 3114 _page_sizes[cur] = _page_sizes[beg]; 3115 } 3116 _page_sizes[end] = vm_page_size(); 3117 _page_sizes[end + 1] = 0; 3118 3119 if (_page_sizes[end] > _page_sizes[end - 1]) { 3120 // Default page size is not the smallest; sort again. 3121 insertion_sort_descending(_page_sizes, end + 1); 3122 } 3123 *page_size = _page_sizes[0]; 3124 3125 return true; 3126} 3127 3128bool os::large_page_init() { 3129 if (!UseLargePages) { 3130 UseISM = false; 3131 UseMPSS = false; 3132 return false; 3133 } 3134 3135 // print a warning if any large page related flag is specified on command line 3136 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3137 !FLAG_IS_DEFAULT(UseISM) || 3138 !FLAG_IS_DEFAULT(UseMPSS) || 3139 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3140 UseISM = UseISM && 3141 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3142 if (UseISM) { 3143 // ISM disables MPSS to be compatible with old JDK behavior 3144 UseMPSS = false; 3145 _page_sizes[0] = _large_page_size; 3146 _page_sizes[1] = vm_page_size(); 3147 } 3148 3149 UseMPSS = UseMPSS && 3150 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3151 3152 UseLargePages = UseISM || UseMPSS; 3153 return UseLargePages; 3154} 3155 3156bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3157 // Signal to OS that we want large pages for addresses 3158 // from addr, addr + bytes 3159 struct memcntl_mha mpss_struct; 3160 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3161 mpss_struct.mha_pagesize = align; 3162 mpss_struct.mha_flags = 0; 3163 if (memcntl(start, bytes, MC_HAT_ADVISE, 3164 (caddr_t) &mpss_struct, 0, 0) < 0) { 3165 debug_only(warning("Attempt to use MPSS failed.")); 3166 return false; 3167 } 3168 return true; 3169} 3170 3171char* os::reserve_memory_special(size_t bytes) { 3172 assert(UseLargePages && UseISM, "only for ISM large pages"); 3173 3174 size_t size = bytes; 3175 char* retAddr = NULL; 3176 int shmid; 3177 key_t ismKey; 3178 3179 bool warn_on_failure = UseISM && 3180 (!FLAG_IS_DEFAULT(UseLargePages) || 3181 !FLAG_IS_DEFAULT(UseISM) || 3182 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3183 ); 3184 char msg[128]; 3185 3186 ismKey = IPC_PRIVATE; 3187 3188 // Create a large shared memory region to attach to based on size. 3189 // Currently, size is the total size of the heap 3190 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3191 if (shmid == -1){ 3192 if (warn_on_failure) { 3193 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3194 warning(msg); 3195 } 3196 return NULL; 3197 } 3198 3199 // Attach to the region 3200 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3201 int err = errno; 3202 3203 // Remove shmid. If shmat() is successful, the actual shared memory segment 3204 // will be deleted when it's detached by shmdt() or when the process 3205 // terminates. If shmat() is not successful this will remove the shared 3206 // segment immediately. 3207 shmctl(shmid, IPC_RMID, NULL); 3208 3209 if (retAddr == (char *) -1) { 3210 if (warn_on_failure) { 3211 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3212 warning(msg); 3213 } 3214 return NULL; 3215 } 3216 3217 return retAddr; 3218} 3219 3220bool os::release_memory_special(char* base, size_t bytes) { 3221 // detaching the SHM segment will also delete it, see reserve_memory_special() 3222 int rslt = shmdt(base); 3223 return rslt == 0; 3224} 3225 3226size_t os::large_page_size() { 3227 return _large_page_size; 3228} 3229 3230// MPSS allows application to commit large page memory on demand; with ISM 3231// the entire memory region must be allocated as shared memory. 3232bool os::can_commit_large_page_memory() { 3233 return UseISM ? false : true; 3234} 3235 3236bool os::can_execute_large_page_memory() { 3237 return UseISM ? false : true; 3238} 3239 3240static int os_sleep(jlong millis, bool interruptible) { 3241 const jlong limit = INT_MAX; 3242 jlong prevtime; 3243 int res; 3244 3245 while (millis > limit) { 3246 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3247 return res; 3248 millis -= limit; 3249 } 3250 3251 // Restart interrupted polls with new parameters until the proper delay 3252 // has been completed. 3253 3254 prevtime = getTimeMillis(); 3255 3256 while (millis > 0) { 3257 jlong newtime; 3258 3259 if (!interruptible) { 3260 // Following assert fails for os::yield_all: 3261 // assert(!thread->is_Java_thread(), "must not be java thread"); 3262 res = poll(NULL, 0, millis); 3263 } else { 3264 JavaThread *jt = JavaThread::current(); 3265 3266 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3267 os::Solaris::clear_interrupted); 3268 } 3269 3270 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3271 // thread.Interrupt. 3272 3273 if((res == OS_ERR) && (errno == EINTR)) { 3274 newtime = getTimeMillis(); 3275 assert(newtime >= prevtime, "time moving backwards"); 3276 /* Doing prevtime and newtime in microseconds doesn't help precision, 3277 and trying to round up to avoid lost milliseconds can result in a 3278 too-short delay. */ 3279 millis -= newtime - prevtime; 3280 if(millis <= 0) 3281 return OS_OK; 3282 prevtime = newtime; 3283 } else 3284 return res; 3285 } 3286 3287 return OS_OK; 3288} 3289 3290// Read calls from inside the vm need to perform state transitions 3291size_t os::read(int fd, void *buf, unsigned int nBytes) { 3292 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3293} 3294 3295int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3296 assert(thread == Thread::current(), "thread consistency check"); 3297 3298 // TODO-FIXME: this should be removed. 3299 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3300 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3301 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3302 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3303 // is fooled into believing that the system is making progress. In the code below we block the 3304 // the watcher thread while safepoint is in progress so that it would not appear as though the 3305 // system is making progress. 3306 if (!Solaris::T2_libthread() && 3307 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3308 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3309 // the entire safepoint, the watcher thread will line up here during the safepoint. 3310 Threads_lock->lock_without_safepoint_check(); 3311 Threads_lock->unlock(); 3312 } 3313 3314 if (thread->is_Java_thread()) { 3315 // This is a JavaThread so we honor the _thread_blocked protocol 3316 // even for sleeps of 0 milliseconds. This was originally done 3317 // as a workaround for bug 4338139. However, now we also do it 3318 // to honor the suspend-equivalent protocol. 3319 3320 JavaThread *jt = (JavaThread *) thread; 3321 ThreadBlockInVM tbivm(jt); 3322 3323 jt->set_suspend_equivalent(); 3324 // cleared by handle_special_suspend_equivalent_condition() or 3325 // java_suspend_self() via check_and_wait_while_suspended() 3326 3327 int ret_code; 3328 if (millis <= 0) { 3329 thr_yield(); 3330 ret_code = 0; 3331 } else { 3332 // The original sleep() implementation did not create an 3333 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3334 // I'm preserving that decision for now. 3335 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3336 3337 ret_code = os_sleep(millis, interruptible); 3338 } 3339 3340 // were we externally suspended while we were waiting? 3341 jt->check_and_wait_while_suspended(); 3342 3343 return ret_code; 3344 } 3345 3346 // non-JavaThread from this point on: 3347 3348 if (millis <= 0) { 3349 thr_yield(); 3350 return 0; 3351 } 3352 3353 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3354 3355 return os_sleep(millis, interruptible); 3356} 3357 3358int os::naked_sleep() { 3359 // %% make the sleep time an integer flag. for now use 1 millisec. 3360 return os_sleep(1, false); 3361} 3362 3363// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3364void os::infinite_sleep() { 3365 while (true) { // sleep forever ... 3366 ::sleep(100); // ... 100 seconds at a time 3367 } 3368} 3369 3370// Used to convert frequent JVM_Yield() to nops 3371bool os::dont_yield() { 3372 if (DontYieldALot) { 3373 static hrtime_t last_time = 0; 3374 hrtime_t diff = getTimeNanos() - last_time; 3375 3376 if (diff < DontYieldALotInterval * 1000000) 3377 return true; 3378 3379 last_time += diff; 3380 3381 return false; 3382 } 3383 else { 3384 return false; 3385 } 3386} 3387 3388// Caveat: Solaris os::yield() causes a thread-state transition whereas 3389// the linux and win32 implementations do not. This should be checked. 3390 3391void os::yield() { 3392 // Yields to all threads with same or greater priority 3393 os::sleep(Thread::current(), 0, false); 3394} 3395 3396// Note that yield semantics are defined by the scheduling class to which 3397// the thread currently belongs. Typically, yield will _not yield to 3398// other equal or higher priority threads that reside on the dispatch queues 3399// of other CPUs. 3400 3401os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3402 3403 3404// On Solaris we found that yield_all doesn't always yield to all other threads. 3405// There have been cases where there is a thread ready to execute but it doesn't 3406// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3407// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3408// SIGWAITING signal which will cause a new lwp to be created. So we count the 3409// number of times yield_all is called in the one loop and increase the sleep 3410// time after 8 attempts. If this fails too we increase the concurrency level 3411// so that the starving thread would get an lwp 3412 3413void os::yield_all(int attempts) { 3414 // Yields to all threads, including threads with lower priorities 3415 if (attempts == 0) { 3416 os::sleep(Thread::current(), 1, false); 3417 } else { 3418 int iterations = attempts % 30; 3419 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3420 // thr_setconcurrency and _getconcurrency make sense only under T1. 3421 int noofLWPS = thr_getconcurrency(); 3422 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3423 thr_setconcurrency(thr_getconcurrency() + 1); 3424 } 3425 } else if (iterations < 25) { 3426 os::sleep(Thread::current(), 1, false); 3427 } else { 3428 os::sleep(Thread::current(), 10, false); 3429 } 3430 } 3431} 3432 3433// Called from the tight loops to possibly influence time-sharing heuristics 3434void os::loop_breaker(int attempts) { 3435 os::yield_all(attempts); 3436} 3437 3438 3439// Interface for setting lwp priorities. If we are using T2 libthread, 3440// which forces the use of BoundThreads or we manually set UseBoundThreads, 3441// all of our threads will be assigned to real lwp's. Using the thr_setprio 3442// function is meaningless in this mode so we must adjust the real lwp's priority 3443// The routines below implement the getting and setting of lwp priorities. 3444// 3445// Note: There are three priority scales used on Solaris. Java priotities 3446// which range from 1 to 10, libthread "thr_setprio" scale which range 3447// from 0 to 127, and the current scheduling class of the process we 3448// are running in. This is typically from -60 to +60. 3449// The setting of the lwp priorities in done after a call to thr_setprio 3450// so Java priorities are mapped to libthread priorities and we map from 3451// the latter to lwp priorities. We don't keep priorities stored in 3452// Java priorities since some of our worker threads want to set priorities 3453// higher than all Java threads. 3454// 3455// For related information: 3456// (1) man -s 2 priocntl 3457// (2) man -s 4 priocntl 3458// (3) man dispadmin 3459// = librt.so 3460// = libthread/common/rtsched.c - thrp_setlwpprio(). 3461// = ps -cL <pid> ... to validate priority. 3462// = sched_get_priority_min and _max 3463// pthread_create 3464// sched_setparam 3465// pthread_setschedparam 3466// 3467// Assumptions: 3468// + We assume that all threads in the process belong to the same 3469// scheduling class. IE. an homogenous process. 3470// + Must be root or in IA group to change change "interactive" attribute. 3471// Priocntl() will fail silently. The only indication of failure is when 3472// we read-back the value and notice that it hasn't changed. 3473// + Interactive threads enter the runq at the head, non-interactive at the tail. 3474// + For RT, change timeslice as well. Invariant: 3475// constant "priority integral" 3476// Konst == TimeSlice * (60-Priority) 3477// Given a priority, compute appropriate timeslice. 3478// + Higher numerical values have higher priority. 3479 3480// sched class attributes 3481typedef struct { 3482 int schedPolicy; // classID 3483 int maxPrio; 3484 int minPrio; 3485} SchedInfo; 3486 3487 3488static SchedInfo tsLimits, iaLimits, rtLimits; 3489 3490#ifdef ASSERT 3491static int ReadBackValidate = 1; 3492#endif 3493static int myClass = 0; 3494static int myMin = 0; 3495static int myMax = 0; 3496static int myCur = 0; 3497static bool priocntl_enable = false; 3498 3499 3500// Call the version of priocntl suitable for all supported versions 3501// of Solaris. We need to call through this wrapper so that we can 3502// build on Solaris 9 and run on Solaris 8, 9 and 10. 3503// 3504// This code should be removed if we ever stop supporting Solaris 8 3505// and earlier releases. 3506 3507static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3508typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3509static priocntl_type priocntl_ptr = priocntl_stub; 3510 3511// Stub to set the value of the real pointer, and then call the real 3512// function. 3513 3514static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3515 // Try Solaris 8- name only. 3516 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3517 guarantee(tmp != NULL, "priocntl function not found."); 3518 priocntl_ptr = tmp; 3519 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3520} 3521 3522 3523// lwp_priocntl_init 3524// 3525// Try to determine the priority scale for our process. 3526// 3527// Return errno or 0 if OK. 3528// 3529static 3530int lwp_priocntl_init () 3531{ 3532 int rslt; 3533 pcinfo_t ClassInfo; 3534 pcparms_t ParmInfo; 3535 int i; 3536 3537 if (!UseThreadPriorities) return 0; 3538 3539 // We are using Bound threads, we need to determine our priority ranges 3540 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3541 // If ThreadPriorityPolicy is 1, switch tables 3542 if (ThreadPriorityPolicy == 1) { 3543 for (i = 0 ; i < MaxPriority+1; i++) 3544 os::java_to_os_priority[i] = prio_policy1[i]; 3545 } 3546 } 3547 // Not using Bound Threads, set to ThreadPolicy 1 3548 else { 3549 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3550 os::java_to_os_priority[i] = prio_policy1[i]; 3551 } 3552 return 0; 3553 } 3554 3555 3556 // Get IDs for a set of well-known scheduling classes. 3557 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3558 // the system. We should have a loop that iterates over the 3559 // classID values, which are known to be "small" integers. 3560 3561 strcpy(ClassInfo.pc_clname, "TS"); 3562 ClassInfo.pc_cid = -1; 3563 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3564 if (rslt < 0) return errno; 3565 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3566 tsLimits.schedPolicy = ClassInfo.pc_cid; 3567 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3568 tsLimits.minPrio = -tsLimits.maxPrio; 3569 3570 strcpy(ClassInfo.pc_clname, "IA"); 3571 ClassInfo.pc_cid = -1; 3572 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3573 if (rslt < 0) return errno; 3574 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3575 iaLimits.schedPolicy = ClassInfo.pc_cid; 3576 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3577 iaLimits.minPrio = -iaLimits.maxPrio; 3578 3579 strcpy(ClassInfo.pc_clname, "RT"); 3580 ClassInfo.pc_cid = -1; 3581 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3582 if (rslt < 0) return errno; 3583 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3584 rtLimits.schedPolicy = ClassInfo.pc_cid; 3585 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3586 rtLimits.minPrio = 0; 3587 3588 3589 // Query our "current" scheduling class. 3590 // This will normally be IA,TS or, rarely, RT. 3591 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3592 ParmInfo.pc_cid = PC_CLNULL; 3593 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3594 if ( rslt < 0 ) return errno; 3595 myClass = ParmInfo.pc_cid; 3596 3597 // We now know our scheduling classId, get specific information 3598 // the class. 3599 ClassInfo.pc_cid = myClass; 3600 ClassInfo.pc_clname[0] = 0; 3601 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3602 if ( rslt < 0 ) return errno; 3603 3604 if (ThreadPriorityVerbose) 3605 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3606 3607 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3608 ParmInfo.pc_cid = PC_CLNULL; 3609 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3610 if (rslt < 0) return errno; 3611 3612 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3613 myMin = rtLimits.minPrio; 3614 myMax = rtLimits.maxPrio; 3615 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3616 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3617 myMin = iaLimits.minPrio; 3618 myMax = iaLimits.maxPrio; 3619 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3620 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3621 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3622 myMin = tsLimits.minPrio; 3623 myMax = tsLimits.maxPrio; 3624 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3625 } else { 3626 // No clue - punt 3627 if (ThreadPriorityVerbose) 3628 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3629 return EINVAL; // no clue, punt 3630 } 3631 3632 if (ThreadPriorityVerbose) 3633 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3634 3635 priocntl_enable = true; // Enable changing priorities 3636 return 0; 3637} 3638 3639#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3640#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3641#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3642 3643 3644// scale_to_lwp_priority 3645// 3646// Convert from the libthread "thr_setprio" scale to our current 3647// lwp scheduling class scale. 3648// 3649static 3650int scale_to_lwp_priority (int rMin, int rMax, int x) 3651{ 3652 int v; 3653 3654 if (x == 127) return rMax; // avoid round-down 3655 v = (((x*(rMax-rMin)))/128)+rMin; 3656 return v; 3657} 3658 3659 3660// set_lwp_priority 3661// 3662// Set the priority of the lwp. This call should only be made 3663// when using bound threads (T2 threads are bound by default). 3664// 3665int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3666{ 3667 int rslt; 3668 int Actual, Expected, prv; 3669 pcparms_t ParmInfo; // for GET-SET 3670#ifdef ASSERT 3671 pcparms_t ReadBack; // for readback 3672#endif 3673 3674 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3675 // Query current values. 3676 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3677 // Cache "pcparms_t" in global ParmCache. 3678 // TODO: elide set-to-same-value 3679 3680 // If something went wrong on init, don't change priorities. 3681 if ( !priocntl_enable ) { 3682 if (ThreadPriorityVerbose) 3683 tty->print_cr("Trying to set priority but init failed, ignoring"); 3684 return EINVAL; 3685 } 3686 3687 3688 // If lwp hasn't started yet, just return 3689 // the _start routine will call us again. 3690 if ( lwpid <= 0 ) { 3691 if (ThreadPriorityVerbose) { 3692 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3693 ThreadID, newPrio); 3694 } 3695 return 0; 3696 } 3697 3698 if (ThreadPriorityVerbose) { 3699 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3700 ThreadID, lwpid, newPrio); 3701 } 3702 3703 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3704 ParmInfo.pc_cid = PC_CLNULL; 3705 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3706 if (rslt < 0) return errno; 3707 3708 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3709 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3710 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3711 rtInfo->rt_tqsecs = RT_NOCHANGE; 3712 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3713 if (ThreadPriorityVerbose) { 3714 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3715 } 3716 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3717 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3718 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3719 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3720 iaInfo->ia_uprilim = IA_NOCHANGE; 3721 iaInfo->ia_nice = IA_NOCHANGE; 3722 iaInfo->ia_mode = IA_NOCHANGE; 3723 if (ThreadPriorityVerbose) { 3724 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3725 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3726 } 3727 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3728 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3729 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3730 prv = tsInfo->ts_upri; 3731 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3732 tsInfo->ts_uprilim = IA_NOCHANGE; 3733 if (ThreadPriorityVerbose) { 3734 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3735 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3736 } 3737 if (prv == tsInfo->ts_upri) return 0; 3738 } else { 3739 if ( ThreadPriorityVerbose ) { 3740 tty->print_cr ("Unknown scheduling class\n"); 3741 } 3742 return EINVAL; // no clue, punt 3743 } 3744 3745 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3746 if (ThreadPriorityVerbose && rslt) { 3747 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3748 } 3749 if (rslt < 0) return errno; 3750 3751#ifdef ASSERT 3752 // Sanity check: read back what we just attempted to set. 3753 // In theory it could have changed in the interim ... 3754 // 3755 // The priocntl system call is tricky. 3756 // Sometimes it'll validate the priority value argument and 3757 // return EINVAL if unhappy. At other times it fails silently. 3758 // Readbacks are prudent. 3759 3760 if (!ReadBackValidate) return 0; 3761 3762 memset(&ReadBack, 0, sizeof(pcparms_t)); 3763 ReadBack.pc_cid = PC_CLNULL; 3764 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3765 assert(rslt >= 0, "priocntl failed"); 3766 Actual = Expected = 0xBAD; 3767 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3768 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3769 Actual = RTPRI(ReadBack)->rt_pri; 3770 Expected = RTPRI(ParmInfo)->rt_pri; 3771 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3772 Actual = IAPRI(ReadBack)->ia_upri; 3773 Expected = IAPRI(ParmInfo)->ia_upri; 3774 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3775 Actual = TSPRI(ReadBack)->ts_upri; 3776 Expected = TSPRI(ParmInfo)->ts_upri; 3777 } else { 3778 if ( ThreadPriorityVerbose ) { 3779 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3780 } 3781 } 3782 3783 if (Actual != Expected) { 3784 if ( ThreadPriorityVerbose ) { 3785 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3786 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3787 } 3788 } 3789#endif 3790 3791 return 0; 3792} 3793 3794 3795 3796// Solaris only gives access to 128 real priorities at a time, 3797// so we expand Java's ten to fill this range. This would be better 3798// if we dynamically adjusted relative priorities. 3799// 3800// The ThreadPriorityPolicy option allows us to select 2 different 3801// priority scales. 3802// 3803// ThreadPriorityPolicy=0 3804// Since the Solaris' default priority is MaximumPriority, we do not 3805// set a priority lower than Max unless a priority lower than 3806// NormPriority is requested. 3807// 3808// ThreadPriorityPolicy=1 3809// This mode causes the priority table to get filled with 3810// linear values. NormPriority get's mapped to 50% of the 3811// Maximum priority an so on. This will cause VM threads 3812// to get unfair treatment against other Solaris processes 3813// which do not explicitly alter their thread priorities. 3814// 3815 3816 3817int os::java_to_os_priority[MaxPriority + 1] = { 3818 -99999, // 0 Entry should never be used 3819 3820 0, // 1 MinPriority 3821 32, // 2 3822 64, // 3 3823 3824 96, // 4 3825 127, // 5 NormPriority 3826 127, // 6 3827 3828 127, // 7 3829 127, // 8 3830 127, // 9 NearMaxPriority 3831 3832 127 // 10 MaxPriority 3833}; 3834 3835 3836OSReturn os::set_native_priority(Thread* thread, int newpri) { 3837 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3838 if ( !UseThreadPriorities ) return OS_OK; 3839 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3840 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3841 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3842 thread->osthread()->lwp_id(), newpri )); 3843 return (status == 0) ? OS_OK : OS_ERR; 3844} 3845 3846 3847OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3848 int p; 3849 if ( !UseThreadPriorities ) { 3850 *priority_ptr = NormalPriority; 3851 return OS_OK; 3852 } 3853 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3854 if (status != 0) { 3855 return OS_ERR; 3856 } 3857 *priority_ptr = p; 3858 return OS_OK; 3859} 3860 3861 3862// Hint to the underlying OS that a task switch would not be good. 3863// Void return because it's a hint and can fail. 3864void os::hint_no_preempt() { 3865 schedctl_start(schedctl_init()); 3866} 3867 3868void os::interrupt(Thread* thread) { 3869 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3870 3871 OSThread* osthread = thread->osthread(); 3872 3873 int isInterrupted = osthread->interrupted(); 3874 if (!isInterrupted) { 3875 osthread->set_interrupted(true); 3876 OrderAccess::fence(); 3877 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3878 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3879 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3880 ParkEvent * const slp = thread->_SleepEvent ; 3881 if (slp != NULL) slp->unpark() ; 3882 } 3883 3884 // For JSR166: unpark after setting status but before thr_kill -dl 3885 if (thread->is_Java_thread()) { 3886 ((JavaThread*)thread)->parker()->unpark(); 3887 } 3888 3889 // Handle interruptible wait() ... 3890 ParkEvent * const ev = thread->_ParkEvent ; 3891 if (ev != NULL) ev->unpark() ; 3892 3893 // When events are used everywhere for os::sleep, then this thr_kill 3894 // will only be needed if UseVMInterruptibleIO is true. 3895 3896 if (!isInterrupted) { 3897 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3898 assert_status(status == 0, status, "thr_kill"); 3899 3900 // Bump thread interruption counter 3901 RuntimeService::record_thread_interrupt_signaled_count(); 3902 } 3903} 3904 3905 3906bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3907 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3908 3909 OSThread* osthread = thread->osthread(); 3910 3911 bool res = osthread->interrupted(); 3912 3913 // NOTE that since there is no "lock" around these two operations, 3914 // there is the possibility that the interrupted flag will be 3915 // "false" but that the interrupt event will be set. This is 3916 // intentional. The effect of this is that Object.wait() will appear 3917 // to have a spurious wakeup, which is not harmful, and the 3918 // possibility is so rare that it is not worth the added complexity 3919 // to add yet another lock. It has also been recommended not to put 3920 // the interrupted flag into the os::Solaris::Event structure, 3921 // because it hides the issue. 3922 if (res && clear_interrupted) { 3923 osthread->set_interrupted(false); 3924 } 3925 return res; 3926} 3927 3928 3929void os::print_statistics() { 3930} 3931 3932int os::message_box(const char* title, const char* message) { 3933 int i; 3934 fdStream err(defaultStream::error_fd()); 3935 for (i = 0; i < 78; i++) err.print_raw("="); 3936 err.cr(); 3937 err.print_raw_cr(title); 3938 for (i = 0; i < 78; i++) err.print_raw("-"); 3939 err.cr(); 3940 err.print_raw_cr(message); 3941 for (i = 0; i < 78; i++) err.print_raw("="); 3942 err.cr(); 3943 3944 char buf[16]; 3945 // Prevent process from exiting upon "read error" without consuming all CPU 3946 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3947 3948 return buf[0] == 'y' || buf[0] == 'Y'; 3949} 3950 3951// A lightweight implementation that does not suspend the target thread and 3952// thus returns only a hint. Used for profiling only! 3953ExtendedPC os::get_thread_pc(Thread* thread) { 3954 // Make sure that it is called by the watcher and the Threads lock is owned. 3955 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3956 // For now, is only used to profile the VM Thread 3957 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3958 ExtendedPC epc; 3959 3960 GetThreadPC_Callback cb(ProfileVM_lock); 3961 OSThread *osthread = thread->osthread(); 3962 const int time_to_wait = 400; // 400ms wait for initial response 3963 int status = cb.interrupt(thread, time_to_wait); 3964 3965 if (cb.is_done() ) { 3966 epc = cb.addr(); 3967 } else { 3968 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 3969 osthread->thread_id(), status);); 3970 // epc is already NULL 3971 } 3972 return epc; 3973} 3974 3975 3976// This does not do anything on Solaris. This is basically a hook for being 3977// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3978void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3979 f(value, method, args, thread); 3980} 3981 3982// This routine may be used by user applications as a "hook" to catch signals. 3983// The user-defined signal handler must pass unrecognized signals to this 3984// routine, and if it returns true (non-zero), then the signal handler must 3985// return immediately. If the flag "abort_if_unrecognized" is true, then this 3986// routine will never retun false (zero), but instead will execute a VM panic 3987// routine kill the process. 3988// 3989// If this routine returns false, it is OK to call it again. This allows 3990// the user-defined signal handler to perform checks either before or after 3991// the VM performs its own checks. Naturally, the user code would be making 3992// a serious error if it tried to handle an exception (such as a null check 3993// or breakpoint) that the VM was generating for its own correct operation. 3994// 3995// This routine may recognize any of the following kinds of signals: 3996// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3997// os::Solaris::SIGasync 3998// It should be consulted by handlers for any of those signals. 3999// It explicitly does not recognize os::Solaris::SIGinterrupt 4000// 4001// The caller of this routine must pass in the three arguments supplied 4002// to the function referred to in the "sa_sigaction" (not the "sa_handler") 4003// field of the structure passed to sigaction(). This routine assumes that 4004// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 4005// 4006// Note that the VM will print warnings if it detects conflicting signal 4007// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 4008// 4009extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 4010 4011 4012void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 4013 JVM_handle_solaris_signal(sig, info, ucVoid, true); 4014} 4015 4016/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 4017 is needed to provoke threads blocked on IO to return an EINTR 4018 Note: this explicitly does NOT call JVM_handle_solaris_signal and 4019 does NOT participate in signal chaining due to requirement for 4020 NOT setting SA_RESTART to make EINTR work. */ 4021extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 4022 if (UseSignalChaining) { 4023 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 4024 if (actp && actp->sa_handler) { 4025 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 4026 } 4027 } 4028} 4029 4030// This boolean allows users to forward their own non-matching signals 4031// to JVM_handle_solaris_signal, harmlessly. 4032bool os::Solaris::signal_handlers_are_installed = false; 4033 4034// For signal-chaining 4035bool os::Solaris::libjsig_is_loaded = false; 4036typedef struct sigaction *(*get_signal_t)(int); 4037get_signal_t os::Solaris::get_signal_action = NULL; 4038 4039struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4040 struct sigaction *actp = NULL; 4041 4042 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4043 // Retrieve the old signal handler from libjsig 4044 actp = (*get_signal_action)(sig); 4045 } 4046 if (actp == NULL) { 4047 // Retrieve the preinstalled signal handler from jvm 4048 actp = get_preinstalled_handler(sig); 4049 } 4050 4051 return actp; 4052} 4053 4054static bool call_chained_handler(struct sigaction *actp, int sig, 4055 siginfo_t *siginfo, void *context) { 4056 // Call the old signal handler 4057 if (actp->sa_handler == SIG_DFL) { 4058 // It's more reasonable to let jvm treat it as an unexpected exception 4059 // instead of taking the default action. 4060 return false; 4061 } else if (actp->sa_handler != SIG_IGN) { 4062 if ((actp->sa_flags & SA_NODEFER) == 0) { 4063 // automaticlly block the signal 4064 sigaddset(&(actp->sa_mask), sig); 4065 } 4066 4067 sa_handler_t hand; 4068 sa_sigaction_t sa; 4069 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4070 // retrieve the chained handler 4071 if (siginfo_flag_set) { 4072 sa = actp->sa_sigaction; 4073 } else { 4074 hand = actp->sa_handler; 4075 } 4076 4077 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4078 actp->sa_handler = SIG_DFL; 4079 } 4080 4081 // try to honor the signal mask 4082 sigset_t oset; 4083 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4084 4085 // call into the chained handler 4086 if (siginfo_flag_set) { 4087 (*sa)(sig, siginfo, context); 4088 } else { 4089 (*hand)(sig); 4090 } 4091 4092 // restore the signal mask 4093 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4094 } 4095 // Tell jvm's signal handler the signal is taken care of. 4096 return true; 4097} 4098 4099bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4100 bool chained = false; 4101 // signal-chaining 4102 if (UseSignalChaining) { 4103 struct sigaction *actp = get_chained_signal_action(sig); 4104 if (actp != NULL) { 4105 chained = call_chained_handler(actp, sig, siginfo, context); 4106 } 4107 } 4108 return chained; 4109} 4110 4111struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4112 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4113 if (preinstalled_sigs[sig] != 0) { 4114 return &chainedsigactions[sig]; 4115 } 4116 return NULL; 4117} 4118 4119void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4120 4121 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4122 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4123 chainedsigactions[sig] = oldAct; 4124 preinstalled_sigs[sig] = 1; 4125} 4126 4127void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4128 // Check for overwrite. 4129 struct sigaction oldAct; 4130 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4131 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4132 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4133 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4134 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4135 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4136 if (AllowUserSignalHandlers || !set_installed) { 4137 // Do not overwrite; user takes responsibility to forward to us. 4138 return; 4139 } else if (UseSignalChaining) { 4140 if (oktochain) { 4141 // save the old handler in jvm 4142 save_preinstalled_handler(sig, oldAct); 4143 } else { 4144 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4145 } 4146 // libjsig also interposes the sigaction() call below and saves the 4147 // old sigaction on it own. 4148 } else { 4149 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4150 } 4151 } 4152 4153 struct sigaction sigAct; 4154 sigfillset(&(sigAct.sa_mask)); 4155 sigAct.sa_handler = SIG_DFL; 4156 4157 sigAct.sa_sigaction = signalHandler; 4158 // Handle SIGSEGV on alternate signal stack if 4159 // not using stack banging 4160 if (!UseStackBanging && sig == SIGSEGV) { 4161 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4162 // Interruptible i/o requires SA_RESTART cleared so EINTR 4163 // is returned instead of restarting system calls 4164 } else if (sig == os::Solaris::SIGinterrupt()) { 4165 sigemptyset(&sigAct.sa_mask); 4166 sigAct.sa_handler = NULL; 4167 sigAct.sa_flags = SA_SIGINFO; 4168 sigAct.sa_sigaction = sigINTRHandler; 4169 } else { 4170 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4171 } 4172 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4173 4174 sigaction(sig, &sigAct, &oldAct); 4175 4176 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4177 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4178 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4179} 4180 4181 4182#define DO_SIGNAL_CHECK(sig) \ 4183 if (!sigismember(&check_signal_done, sig)) \ 4184 os::Solaris::check_signal_handler(sig) 4185 4186// This method is a periodic task to check for misbehaving JNI applications 4187// under CheckJNI, we can add any periodic checks here 4188 4189void os::run_periodic_checks() { 4190 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4191 // thereby preventing a NULL checks. 4192 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4193 4194 if (check_signals == false) return; 4195 4196 // SEGV and BUS if overridden could potentially prevent 4197 // generation of hs*.log in the event of a crash, debugging 4198 // such a case can be very challenging, so we absolutely 4199 // check for the following for a good measure: 4200 DO_SIGNAL_CHECK(SIGSEGV); 4201 DO_SIGNAL_CHECK(SIGILL); 4202 DO_SIGNAL_CHECK(SIGFPE); 4203 DO_SIGNAL_CHECK(SIGBUS); 4204 DO_SIGNAL_CHECK(SIGPIPE); 4205 DO_SIGNAL_CHECK(SIGXFSZ); 4206 4207 // ReduceSignalUsage allows the user to override these handlers 4208 // see comments at the very top and jvm_solaris.h 4209 if (!ReduceSignalUsage) { 4210 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4211 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4212 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4213 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4214 } 4215 4216 // See comments above for using JVM1/JVM2 and UseAltSigs 4217 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4218 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4219 4220} 4221 4222typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4223 4224static os_sigaction_t os_sigaction = NULL; 4225 4226void os::Solaris::check_signal_handler(int sig) { 4227 char buf[O_BUFLEN]; 4228 address jvmHandler = NULL; 4229 4230 struct sigaction act; 4231 if (os_sigaction == NULL) { 4232 // only trust the default sigaction, in case it has been interposed 4233 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4234 if (os_sigaction == NULL) return; 4235 } 4236 4237 os_sigaction(sig, (struct sigaction*)NULL, &act); 4238 4239 address thisHandler = (act.sa_flags & SA_SIGINFO) 4240 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4241 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4242 4243 4244 switch(sig) { 4245 case SIGSEGV: 4246 case SIGBUS: 4247 case SIGFPE: 4248 case SIGPIPE: 4249 case SIGXFSZ: 4250 case SIGILL: 4251 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4252 break; 4253 4254 case SHUTDOWN1_SIGNAL: 4255 case SHUTDOWN2_SIGNAL: 4256 case SHUTDOWN3_SIGNAL: 4257 case BREAK_SIGNAL: 4258 jvmHandler = (address)user_handler(); 4259 break; 4260 4261 default: 4262 int intrsig = os::Solaris::SIGinterrupt(); 4263 int asynsig = os::Solaris::SIGasync(); 4264 4265 if (sig == intrsig) { 4266 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4267 } else if (sig == asynsig) { 4268 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4269 } else { 4270 return; 4271 } 4272 break; 4273 } 4274 4275 4276 if (thisHandler != jvmHandler) { 4277 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4278 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4279 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4280 // No need to check this sig any longer 4281 sigaddset(&check_signal_done, sig); 4282 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4283 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4284 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4285 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4286 // No need to check this sig any longer 4287 sigaddset(&check_signal_done, sig); 4288 } 4289 4290 // Print all the signal handler state 4291 if (sigismember(&check_signal_done, sig)) { 4292 print_signal_handlers(tty, buf, O_BUFLEN); 4293 } 4294 4295} 4296 4297void os::Solaris::install_signal_handlers() { 4298 bool libjsigdone = false; 4299 signal_handlers_are_installed = true; 4300 4301 // signal-chaining 4302 typedef void (*signal_setting_t)(); 4303 signal_setting_t begin_signal_setting = NULL; 4304 signal_setting_t end_signal_setting = NULL; 4305 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4306 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4307 if (begin_signal_setting != NULL) { 4308 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4309 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4310 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4311 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4312 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4313 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4314 libjsig_is_loaded = true; 4315 if (os::Solaris::get_libjsig_version != NULL) { 4316 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4317 } 4318 assert(UseSignalChaining, "should enable signal-chaining"); 4319 } 4320 if (libjsig_is_loaded) { 4321 // Tell libjsig jvm is setting signal handlers 4322 (*begin_signal_setting)(); 4323 } 4324 4325 set_signal_handler(SIGSEGV, true, true); 4326 set_signal_handler(SIGPIPE, true, true); 4327 set_signal_handler(SIGXFSZ, true, true); 4328 set_signal_handler(SIGBUS, true, true); 4329 set_signal_handler(SIGILL, true, true); 4330 set_signal_handler(SIGFPE, true, true); 4331 4332 4333 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4334 4335 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4336 // can not register overridable signals which might be > 32 4337 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4338 // Tell libjsig jvm has finished setting signal handlers 4339 (*end_signal_setting)(); 4340 libjsigdone = true; 4341 } 4342 } 4343 4344 // Never ok to chain our SIGinterrupt 4345 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4346 set_signal_handler(os::Solaris::SIGasync(), true, true); 4347 4348 if (libjsig_is_loaded && !libjsigdone) { 4349 // Tell libjsig jvm finishes setting signal handlers 4350 (*end_signal_setting)(); 4351 } 4352 4353 // We don't activate signal checker if libjsig is in place, we trust ourselves 4354 // and if UserSignalHandler is installed all bets are off 4355 if (CheckJNICalls) { 4356 if (libjsig_is_loaded) { 4357 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4358 check_signals = false; 4359 } 4360 if (AllowUserSignalHandlers) { 4361 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4362 check_signals = false; 4363 } 4364 } 4365} 4366 4367 4368void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4369 4370const char * signames[] = { 4371 "SIG0", 4372 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4373 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4374 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4375 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4376 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4377 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4378 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4379 "SIGCANCEL", "SIGLOST" 4380}; 4381 4382const char* os::exception_name(int exception_code, char* buf, size_t size) { 4383 if (0 < exception_code && exception_code <= SIGRTMAX) { 4384 // signal 4385 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4386 jio_snprintf(buf, size, "%s", signames[exception_code]); 4387 } else { 4388 jio_snprintf(buf, size, "SIG%d", exception_code); 4389 } 4390 return buf; 4391 } else { 4392 return NULL; 4393 } 4394} 4395 4396// (Static) wrappers for the new libthread API 4397int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4398int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4399int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4400int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4401int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4402 4403// (Static) wrappers for the liblgrp API 4404os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4405os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4406os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4407os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4408os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4409os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4410os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4411os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4412os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4413 4414// (Static) wrapper for meminfo() call. 4415os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4416 4417static address resolve_symbol(const char *name) { 4418 address addr; 4419 4420 addr = (address) dlsym(RTLD_DEFAULT, name); 4421 if(addr == NULL) { 4422 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4423 addr = (address) dlsym(RTLD_NEXT, name); 4424 if(addr == NULL) { 4425 fatal(dlerror()); 4426 } 4427 } 4428 return addr; 4429} 4430 4431 4432 4433// isT2_libthread() 4434// 4435// Routine to determine if we are currently using the new T2 libthread. 4436// 4437// We determine if we are using T2 by reading /proc/self/lstatus and 4438// looking for a thread with the ASLWP bit set. If we find this status 4439// bit set, we must assume that we are NOT using T2. The T2 team 4440// has approved this algorithm. 4441// 4442// We need to determine if we are running with the new T2 libthread 4443// since setting native thread priorities is handled differently 4444// when using this library. All threads created using T2 are bound 4445// threads. Calling thr_setprio is meaningless in this case. 4446// 4447bool isT2_libthread() { 4448 static prheader_t * lwpArray = NULL; 4449 static int lwpSize = 0; 4450 static int lwpFile = -1; 4451 lwpstatus_t * that; 4452 char lwpName [128]; 4453 bool isT2 = false; 4454 4455#define ADR(x) ((uintptr_t)(x)) 4456#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4457 4458 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4459 if (lwpFile < 0) { 4460 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4461 return false; 4462 } 4463 lwpSize = 16*1024; 4464 for (;;) { 4465 lseek (lwpFile, 0, SEEK_SET); 4466 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4467 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4468 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4469 break; 4470 } 4471 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4472 // We got a good snapshot - now iterate over the list. 4473 int aslwpcount = 0; 4474 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4475 that = LWPINDEX(lwpArray,i); 4476 if (that->pr_flags & PR_ASLWP) { 4477 aslwpcount++; 4478 } 4479 } 4480 if (aslwpcount == 0) isT2 = true; 4481 break; 4482 } 4483 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4484 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4485 } 4486 4487 FREE_C_HEAP_ARRAY(char, lwpArray); 4488 close (lwpFile); 4489 if (ThreadPriorityVerbose) { 4490 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4491 else tty->print_cr("We are not running with a T2 libthread\n"); 4492 } 4493 return isT2; 4494} 4495 4496 4497void os::Solaris::libthread_init() { 4498 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4499 4500 // Determine if we are running with the new T2 libthread 4501 os::Solaris::set_T2_libthread(isT2_libthread()); 4502 4503 lwp_priocntl_init(); 4504 4505 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4506 if(func == NULL) { 4507 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4508 // Guarantee that this VM is running on an new enough OS (5.6 or 4509 // later) that it will have a new enough libthread.so. 4510 guarantee(func != NULL, "libthread.so is too old."); 4511 } 4512 4513 // Initialize the new libthread getstate API wrappers 4514 func = resolve_symbol("thr_getstate"); 4515 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4516 4517 func = resolve_symbol("thr_setstate"); 4518 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4519 4520 func = resolve_symbol("thr_setmutator"); 4521 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4522 4523 func = resolve_symbol("thr_suspend_mutator"); 4524 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4525 4526 func = resolve_symbol("thr_continue_mutator"); 4527 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4528 4529 int size; 4530 void (*handler_info_func)(address *, int *); 4531 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4532 handler_info_func(&handler_start, &size); 4533 handler_end = handler_start + size; 4534} 4535 4536 4537int_fnP_mutex_tP os::Solaris::_mutex_lock; 4538int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4539int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4540int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4541int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4542int os::Solaris::_mutex_scope = USYNC_THREAD; 4543 4544int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4545int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4546int_fnP_cond_tP os::Solaris::_cond_signal; 4547int_fnP_cond_tP os::Solaris::_cond_broadcast; 4548int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4549int_fnP_cond_tP os::Solaris::_cond_destroy; 4550int os::Solaris::_cond_scope = USYNC_THREAD; 4551 4552void os::Solaris::synchronization_init() { 4553 if(UseLWPSynchronization) { 4554 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4555 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4556 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4557 os::Solaris::set_mutex_init(lwp_mutex_init); 4558 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4559 os::Solaris::set_mutex_scope(USYNC_THREAD); 4560 4561 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4562 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4563 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4564 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4565 os::Solaris::set_cond_init(lwp_cond_init); 4566 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4567 os::Solaris::set_cond_scope(USYNC_THREAD); 4568 } 4569 else { 4570 os::Solaris::set_mutex_scope(USYNC_THREAD); 4571 os::Solaris::set_cond_scope(USYNC_THREAD); 4572 4573 if(UsePthreads) { 4574 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4575 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4576 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4577 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4578 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4579 4580 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4581 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4582 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4583 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4584 os::Solaris::set_cond_init(pthread_cond_default_init); 4585 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4586 } 4587 else { 4588 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4589 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4590 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4591 os::Solaris::set_mutex_init(::mutex_init); 4592 os::Solaris::set_mutex_destroy(::mutex_destroy); 4593 4594 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4595 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4596 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4597 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4598 os::Solaris::set_cond_init(::cond_init); 4599 os::Solaris::set_cond_destroy(::cond_destroy); 4600 } 4601 } 4602} 4603 4604void os::Solaris::liblgrp_init() { 4605 void *handle = dlopen("liblgrp.so", RTLD_LAZY); 4606 if (handle != NULL) { 4607 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4608 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4609 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4610 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4611 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4612 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4613 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4614 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4615 dlsym(handle, "lgrp_cookie_stale"))); 4616 4617 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4618 set_lgrp_cookie(c); 4619 } else { 4620 warning("your OS does not support NUMA"); 4621 } 4622} 4623 4624void os::Solaris::misc_sym_init() { 4625 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4626 if(func == NULL) { 4627 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4628 } 4629 if (func != NULL) { 4630 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4631 } 4632} 4633 4634// Symbol doesn't exist in Solaris 8 pset.h 4635#ifndef PS_MYID 4636#define PS_MYID -3 4637#endif 4638 4639// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4640typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4641static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4642 4643void init_pset_getloadavg_ptr(void) { 4644 pset_getloadavg_ptr = 4645 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4646 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4647 warning("pset_getloadavg function not found"); 4648 } 4649} 4650 4651int os::Solaris::_dev_zero_fd = -1; 4652 4653// this is called _before_ the global arguments have been parsed 4654void os::init(void) { 4655 _initial_pid = getpid(); 4656 4657 max_hrtime = first_hrtime = gethrtime(); 4658 4659 init_random(1234567); 4660 4661 page_size = sysconf(_SC_PAGESIZE); 4662 if (page_size == -1) 4663 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4664 init_page_sizes((size_t) page_size); 4665 4666 Solaris::initialize_system_info(); 4667 4668 int fd = open("/dev/zero", O_RDWR); 4669 if (fd < 0) { 4670 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4671 } else { 4672 Solaris::set_dev_zero_fd(fd); 4673 4674 // Close on exec, child won't inherit. 4675 fcntl(fd, F_SETFD, FD_CLOEXEC); 4676 } 4677 4678 clock_tics_per_sec = CLK_TCK; 4679 4680 // check if dladdr1() exists; dladdr1 can provide more information than 4681 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4682 // and is available on linker patches for 5.7 and 5.8. 4683 // libdl.so must have been loaded, this call is just an entry lookup 4684 void * hdl = dlopen("libdl.so", RTLD_NOW); 4685 if (hdl) 4686 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4687 4688 // (Solaris only) this switches to calls that actually do locking. 4689 ThreadCritical::initialize(); 4690 4691 main_thread = thr_self(); 4692 4693 // Constant minimum stack size allowed. It must be at least 4694 // the minimum of what the OS supports (thr_min_stack()), and 4695 // enough to allow the thread to get to user bytecode execution. 4696 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4697 // If the pagesize of the VM is greater than 8K determine the appropriate 4698 // number of initial guard pages. The user can change this with the 4699 // command line arguments, if needed. 4700 if (vm_page_size() > 8*K) { 4701 StackYellowPages = 1; 4702 StackRedPages = 1; 4703 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4704 } 4705} 4706 4707// To install functions for atexit system call 4708extern "C" { 4709 static void perfMemory_exit_helper() { 4710 perfMemory_exit(); 4711 } 4712} 4713 4714// this is called _after_ the global arguments have been parsed 4715jint os::init_2(void) { 4716 // try to enable extended file IO ASAP, see 6431278 4717 os::Solaris::try_enable_extended_io(); 4718 4719 // Allocate a single page and mark it as readable for safepoint polling. Also 4720 // use this first mmap call to check support for MAP_ALIGN. 4721 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4722 page_size, 4723 MAP_PRIVATE | MAP_ALIGN, 4724 PROT_READ); 4725 if (polling_page == NULL) { 4726 has_map_align = false; 4727 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4728 PROT_READ); 4729 } 4730 4731 os::set_polling_page(polling_page); 4732 4733#ifndef PRODUCT 4734 if( Verbose && PrintMiscellaneous ) 4735 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4736#endif 4737 4738 if (!UseMembar) { 4739 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4740 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4741 os::set_memory_serialize_page( mem_serialize_page ); 4742 4743#ifndef PRODUCT 4744 if(Verbose && PrintMiscellaneous) 4745 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4746#endif 4747} 4748 4749 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4750 4751 // Check minimum allowable stack size for thread creation and to initialize 4752 // the java system classes, including StackOverflowError - depends on page 4753 // size. Add a page for compiler2 recursion in main thread. 4754 // Add in BytesPerWord times page size to account for VM stack during 4755 // class initialization depending on 32 or 64 bit VM. 4756 guarantee((Solaris::min_stack_allowed >= 4757 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4758 COMPILER2_PRESENT(+1)) * page_size), 4759 "need to increase Solaris::min_stack_allowed on this platform"); 4760 4761 size_t threadStackSizeInBytes = ThreadStackSize * K; 4762 if (threadStackSizeInBytes != 0 && 4763 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4764 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4765 Solaris::min_stack_allowed/K); 4766 return JNI_ERR; 4767 } 4768 4769 // For 64kbps there will be a 64kb page size, which makes 4770 // the usable default stack size quite a bit less. Increase the 4771 // stack for 64kb (or any > than 8kb) pages, this increases 4772 // virtual memory fragmentation (since we're not creating the 4773 // stack on a power of 2 boundary. The real fix for this 4774 // should be to fix the guard page mechanism. 4775 4776 if (vm_page_size() > 8*K) { 4777 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4778 ? threadStackSizeInBytes + 4779 ((StackYellowPages + StackRedPages) * vm_page_size()) 4780 : 0; 4781 ThreadStackSize = threadStackSizeInBytes/K; 4782 } 4783 4784 // Make the stack size a multiple of the page size so that 4785 // the yellow/red zones can be guarded. 4786 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4787 vm_page_size())); 4788 4789 Solaris::libthread_init(); 4790 if (UseNUMA) { 4791 Solaris::liblgrp_init(); 4792 } 4793 Solaris::misc_sym_init(); 4794 Solaris::signal_sets_init(); 4795 Solaris::init_signal_mem(); 4796 Solaris::install_signal_handlers(); 4797 4798 if (libjsigversion < JSIG_VERSION_1_4_1) { 4799 Maxlibjsigsigs = OLDMAXSIGNUM; 4800 } 4801 4802 // initialize synchronization primitives to use either thread or 4803 // lwp synchronization (controlled by UseLWPSynchronization) 4804 Solaris::synchronization_init(); 4805 4806 if (MaxFDLimit) { 4807 // set the number of file descriptors to max. print out error 4808 // if getrlimit/setrlimit fails but continue regardless. 4809 struct rlimit nbr_files; 4810 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4811 if (status != 0) { 4812 if (PrintMiscellaneous && (Verbose || WizardMode)) 4813 perror("os::init_2 getrlimit failed"); 4814 } else { 4815 nbr_files.rlim_cur = nbr_files.rlim_max; 4816 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4817 if (status != 0) { 4818 if (PrintMiscellaneous && (Verbose || WizardMode)) 4819 perror("os::init_2 setrlimit failed"); 4820 } 4821 } 4822 } 4823 4824 // Initialize HPI. 4825 jint hpi_result = hpi::initialize(); 4826 if (hpi_result != JNI_OK) { 4827 tty->print_cr("There was an error trying to initialize the HPI library."); 4828 return hpi_result; 4829 } 4830 4831 // Calculate theoretical max. size of Threads to guard gainst 4832 // artifical out-of-memory situations, where all available address- 4833 // space has been reserved by thread stacks. Default stack size is 1Mb. 4834 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4835 JavaThread::stack_size_at_create() : (1*K*K); 4836 assert(pre_thread_stack_size != 0, "Must have a stack"); 4837 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4838 // we should start doing Virtual Memory banging. Currently when the threads will 4839 // have used all but 200Mb of space. 4840 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4841 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4842 4843 // at-exit methods are called in the reverse order of their registration. 4844 // In Solaris 7 and earlier, atexit functions are called on return from 4845 // main or as a result of a call to exit(3C). There can be only 32 of 4846 // these functions registered and atexit() does not set errno. In Solaris 4847 // 8 and later, there is no limit to the number of functions registered 4848 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4849 // functions are called upon dlclose(3DL) in addition to return from main 4850 // and exit(3C). 4851 4852 if (PerfAllowAtExitRegistration) { 4853 // only register atexit functions if PerfAllowAtExitRegistration is set. 4854 // atexit functions can be delayed until process exit time, which 4855 // can be problematic for embedded VM situations. Embedded VMs should 4856 // call DestroyJavaVM() to assure that VM resources are released. 4857 4858 // note: perfMemory_exit_helper atexit function may be removed in 4859 // the future if the appropriate cleanup code can be added to the 4860 // VM_Exit VMOperation's doit method. 4861 if (atexit(perfMemory_exit_helper) != 0) { 4862 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4863 } 4864 } 4865 4866 // Init pset_loadavg function pointer 4867 init_pset_getloadavg_ptr(); 4868 4869 return JNI_OK; 4870} 4871 4872 4873// Mark the polling page as unreadable 4874void os::make_polling_page_unreadable(void) { 4875 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4876 fatal("Could not disable polling page"); 4877}; 4878 4879// Mark the polling page as readable 4880void os::make_polling_page_readable(void) { 4881 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4882 fatal("Could not enable polling page"); 4883}; 4884 4885// OS interface. 4886 4887int os::stat(const char *path, struct stat *sbuf) { 4888 char pathbuf[MAX_PATH]; 4889 if (strlen(path) > MAX_PATH - 1) { 4890 errno = ENAMETOOLONG; 4891 return -1; 4892 } 4893 hpi::native_path(strcpy(pathbuf, path)); 4894 return ::stat(pathbuf, sbuf); 4895} 4896 4897 4898bool os::check_heap(bool force) { return true; } 4899 4900typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4901static vsnprintf_t sol_vsnprintf = NULL; 4902 4903int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4904 if (!sol_vsnprintf) { 4905 //search for the named symbol in the objects that were loaded after libjvm 4906 void* where = RTLD_NEXT; 4907 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4908 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4909 if (!sol_vsnprintf){ 4910 //search for the named symbol in the objects that were loaded before libjvm 4911 where = RTLD_DEFAULT; 4912 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4913 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4914 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4915 } 4916 } 4917 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4918} 4919 4920 4921// Is a (classpath) directory empty? 4922bool os::dir_is_empty(const char* path) { 4923 DIR *dir = NULL; 4924 struct dirent *ptr; 4925 4926 dir = opendir(path); 4927 if (dir == NULL) return true; 4928 4929 /* Scan the directory */ 4930 bool result = true; 4931 char buf[sizeof(struct dirent) + MAX_PATH]; 4932 struct dirent *dbuf = (struct dirent *) buf; 4933 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4934 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4935 result = false; 4936 } 4937 } 4938 closedir(dir); 4939 return result; 4940} 4941 4942// create binary file, rewriting existing file if required 4943int os::create_binary_file(const char* path, bool rewrite_existing) { 4944 int oflags = O_WRONLY | O_CREAT; 4945 if (!rewrite_existing) { 4946 oflags |= O_EXCL; 4947 } 4948 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4949} 4950 4951// return current position of file pointer 4952jlong os::current_file_offset(int fd) { 4953 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4954} 4955 4956// move file pointer to the specified offset 4957jlong os::seek_to_file_offset(int fd, jlong offset) { 4958 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4959} 4960 4961// Map a block of memory. 4962char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4963 char *addr, size_t bytes, bool read_only, 4964 bool allow_exec) { 4965 int prot; 4966 int flags; 4967 4968 if (read_only) { 4969 prot = PROT_READ; 4970 flags = MAP_SHARED; 4971 } else { 4972 prot = PROT_READ | PROT_WRITE; 4973 flags = MAP_PRIVATE; 4974 } 4975 4976 if (allow_exec) { 4977 prot |= PROT_EXEC; 4978 } 4979 4980 if (addr != NULL) { 4981 flags |= MAP_FIXED; 4982 } 4983 4984 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4985 fd, file_offset); 4986 if (mapped_address == MAP_FAILED) { 4987 return NULL; 4988 } 4989 return mapped_address; 4990} 4991 4992 4993// Remap a block of memory. 4994char* os::remap_memory(int fd, const char* file_name, size_t file_offset, 4995 char *addr, size_t bytes, bool read_only, 4996 bool allow_exec) { 4997 // same as map_memory() on this OS 4998 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4999 allow_exec); 5000} 5001 5002 5003// Unmap a block of memory. 5004bool os::unmap_memory(char* addr, size_t bytes) { 5005 return munmap(addr, bytes) == 0; 5006} 5007 5008void os::pause() { 5009 char filename[MAX_PATH]; 5010 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5011 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5012 } else { 5013 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5014 } 5015 5016 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5017 if (fd != -1) { 5018 struct stat buf; 5019 close(fd); 5020 while (::stat(filename, &buf) == 0) { 5021 (void)::poll(NULL, 0, 100); 5022 } 5023 } else { 5024 jio_fprintf(stderr, 5025 "Could not open pause file '%s', continuing immediately.\n", filename); 5026 } 5027} 5028 5029#ifndef PRODUCT 5030#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5031// Turn this on if you need to trace synch operations. 5032// Set RECORD_SYNCH_LIMIT to a large-enough value, 5033// and call record_synch_enable and record_synch_disable 5034// around the computation of interest. 5035 5036void record_synch(char* name, bool returning); // defined below 5037 5038class RecordSynch { 5039 char* _name; 5040 public: 5041 RecordSynch(char* name) :_name(name) 5042 { record_synch(_name, false); } 5043 ~RecordSynch() { record_synch(_name, true); } 5044}; 5045 5046#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5047extern "C" ret name params { \ 5048 typedef ret name##_t params; \ 5049 static name##_t* implem = NULL; \ 5050 static int callcount = 0; \ 5051 if (implem == NULL) { \ 5052 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5053 if (implem == NULL) fatal(dlerror()); \ 5054 } \ 5055 ++callcount; \ 5056 RecordSynch _rs(#name); \ 5057 inner; \ 5058 return implem args; \ 5059} 5060// in dbx, examine callcounts this way: 5061// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5062 5063#define CHECK_POINTER_OK(p) \ 5064 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5065#define CHECK_MU \ 5066 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5067#define CHECK_CV \ 5068 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5069#define CHECK_P(p) \ 5070 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5071 5072#define CHECK_MUTEX(mutex_op) \ 5073CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5074 5075CHECK_MUTEX( mutex_lock) 5076CHECK_MUTEX( _mutex_lock) 5077CHECK_MUTEX( mutex_unlock) 5078CHECK_MUTEX(_mutex_unlock) 5079CHECK_MUTEX( mutex_trylock) 5080CHECK_MUTEX(_mutex_trylock) 5081 5082#define CHECK_COND(cond_op) \ 5083CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5084 5085CHECK_COND( cond_wait); 5086CHECK_COND(_cond_wait); 5087CHECK_COND(_cond_wait_cancel); 5088 5089#define CHECK_COND2(cond_op) \ 5090CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5091 5092CHECK_COND2( cond_timedwait); 5093CHECK_COND2(_cond_timedwait); 5094CHECK_COND2(_cond_timedwait_cancel); 5095 5096// do the _lwp_* versions too 5097#define mutex_t lwp_mutex_t 5098#define cond_t lwp_cond_t 5099CHECK_MUTEX( _lwp_mutex_lock) 5100CHECK_MUTEX( _lwp_mutex_unlock) 5101CHECK_MUTEX( _lwp_mutex_trylock) 5102CHECK_MUTEX( __lwp_mutex_lock) 5103CHECK_MUTEX( __lwp_mutex_unlock) 5104CHECK_MUTEX( __lwp_mutex_trylock) 5105CHECK_MUTEX(___lwp_mutex_lock) 5106CHECK_MUTEX(___lwp_mutex_unlock) 5107 5108CHECK_COND( _lwp_cond_wait); 5109CHECK_COND( __lwp_cond_wait); 5110CHECK_COND(___lwp_cond_wait); 5111 5112CHECK_COND2( _lwp_cond_timedwait); 5113CHECK_COND2( __lwp_cond_timedwait); 5114#undef mutex_t 5115#undef cond_t 5116 5117CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5118CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5119CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5120CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5121CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5122CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5123CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5124CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5125 5126 5127// recording machinery: 5128 5129enum { RECORD_SYNCH_LIMIT = 200 }; 5130char* record_synch_name[RECORD_SYNCH_LIMIT]; 5131void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5132bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5133thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5134int record_synch_count = 0; 5135bool record_synch_enabled = false; 5136 5137// in dbx, examine recorded data this way: 5138// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5139 5140void record_synch(char* name, bool returning) { 5141 if (record_synch_enabled) { 5142 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5143 record_synch_name[record_synch_count] = name; 5144 record_synch_returning[record_synch_count] = returning; 5145 record_synch_thread[record_synch_count] = thr_self(); 5146 record_synch_arg0ptr[record_synch_count] = &name; 5147 record_synch_count++; 5148 } 5149 // put more checking code here: 5150 // ... 5151 } 5152} 5153 5154void record_synch_enable() { 5155 // start collecting trace data, if not already doing so 5156 if (!record_synch_enabled) record_synch_count = 0; 5157 record_synch_enabled = true; 5158} 5159 5160void record_synch_disable() { 5161 // stop collecting trace data 5162 record_synch_enabled = false; 5163} 5164 5165#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5166#endif // PRODUCT 5167 5168const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5169const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5170 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5171 5172 5173// JVMTI & JVM monitoring and management support 5174// The thread_cpu_time() and current_thread_cpu_time() are only 5175// supported if is_thread_cpu_time_supported() returns true. 5176// They are not supported on Solaris T1. 5177 5178// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5179// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5180// of a thread. 5181// 5182// current_thread_cpu_time() and thread_cpu_time(Thread *) 5183// returns the fast estimate available on the platform. 5184 5185// hrtime_t gethrvtime() return value includes 5186// user time but does not include system time 5187jlong os::current_thread_cpu_time() { 5188 return (jlong) gethrvtime(); 5189} 5190 5191jlong os::thread_cpu_time(Thread *thread) { 5192 // return user level CPU time only to be consistent with 5193 // what current_thread_cpu_time returns. 5194 // thread_cpu_time_info() must be changed if this changes 5195 return os::thread_cpu_time(thread, false /* user time only */); 5196} 5197 5198jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5199 if (user_sys_cpu_time) { 5200 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5201 } else { 5202 return os::current_thread_cpu_time(); 5203 } 5204} 5205 5206jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5207 char proc_name[64]; 5208 int count; 5209 prusage_t prusage; 5210 jlong lwp_time; 5211 int fd; 5212 5213 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5214 getpid(), 5215 thread->osthread()->lwp_id()); 5216 fd = open(proc_name, O_RDONLY); 5217 if ( fd == -1 ) return -1; 5218 5219 do { 5220 count = pread(fd, 5221 (void *)&prusage.pr_utime, 5222 thr_time_size, 5223 thr_time_off); 5224 } while (count < 0 && errno == EINTR); 5225 close(fd); 5226 if ( count < 0 ) return -1; 5227 5228 if (user_sys_cpu_time) { 5229 // user + system CPU time 5230 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5231 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5232 (jlong)prusage.pr_stime.tv_nsec + 5233 (jlong)prusage.pr_utime.tv_nsec; 5234 } else { 5235 // user level CPU time only 5236 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5237 (jlong)prusage.pr_utime.tv_nsec; 5238 } 5239 5240 return(lwp_time); 5241} 5242 5243void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5244 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5245 info_ptr->may_skip_backward = false; // elapsed time not wall time 5246 info_ptr->may_skip_forward = false; // elapsed time not wall time 5247 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5248} 5249 5250void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5251 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5252 info_ptr->may_skip_backward = false; // elapsed time not wall time 5253 info_ptr->may_skip_forward = false; // elapsed time not wall time 5254 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5255} 5256 5257bool os::is_thread_cpu_time_supported() { 5258 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5259 return true; 5260 } else { 5261 return false; 5262 } 5263} 5264 5265// System loadavg support. Returns -1 if load average cannot be obtained. 5266// Return the load average for our processor set if the primitive exists 5267// (Solaris 9 and later). Otherwise just return system wide loadavg. 5268int os::loadavg(double loadavg[], int nelem) { 5269 if (pset_getloadavg_ptr != NULL) { 5270 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5271 } else { 5272 return ::getloadavg(loadavg, nelem); 5273 } 5274} 5275 5276//--------------------------------------------------------------------------------- 5277#ifndef PRODUCT 5278 5279static address same_page(address x, address y) { 5280 intptr_t page_bits = -os::vm_page_size(); 5281 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5282 return x; 5283 else if (x > y) 5284 return (address)(intptr_t(y) | ~page_bits) + 1; 5285 else 5286 return (address)(intptr_t(y) & page_bits); 5287} 5288 5289bool os::find(address addr) { 5290 Dl_info dlinfo; 5291 memset(&dlinfo, 0, sizeof(dlinfo)); 5292 if (dladdr(addr, &dlinfo)) { 5293#ifdef _LP64 5294 tty->print("0x%016lx: ", addr); 5295#else 5296 tty->print("0x%08x: ", addr); 5297#endif 5298 if (dlinfo.dli_sname != NULL) 5299 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5300 else if (dlinfo.dli_fname) 5301 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5302 else 5303 tty->print("<absolute address>"); 5304 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5305#ifdef _LP64 5306 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5307#else 5308 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5309#endif 5310 tty->cr(); 5311 5312 if (Verbose) { 5313 // decode some bytes around the PC 5314 address begin = same_page(addr-40, addr); 5315 address end = same_page(addr+40, addr); 5316 address lowest = (address) dlinfo.dli_sname; 5317 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5318 if (begin < lowest) begin = lowest; 5319 Dl_info dlinfo2; 5320 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5321 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5322 end = (address) dlinfo2.dli_saddr; 5323 Disassembler::decode(begin, end); 5324 } 5325 return true; 5326 } 5327 return false; 5328} 5329 5330#endif 5331 5332 5333// Following function has been added to support HotSparc's libjvm.so running 5334// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5335// src/solaris/hpi/native_threads in the EVM codebase. 5336// 5337// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5338// libraries and should thus be removed. We will leave it behind for a while 5339// until we no longer want to able to run on top of 1.3.0 Solaris production 5340// JDK. See 4341971. 5341 5342#define STACK_SLACK 0x800 5343 5344extern "C" { 5345 intptr_t sysThreadAvailableStackWithSlack() { 5346 stack_t st; 5347 intptr_t retval, stack_top; 5348 retval = thr_stksegment(&st); 5349 assert(retval == 0, "incorrect return value from thr_stksegment"); 5350 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5351 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5352 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5353 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5354 } 5355} 5356 5357// Just to get the Kernel build to link on solaris for testing. 5358 5359extern "C" { 5360class ASGCT_CallTrace; 5361void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5362 KERNEL_RETURN; 5363} 5364 5365 5366// ObjectMonitor park-unpark infrastructure ... 5367// 5368// We implement Solaris and Linux PlatformEvents with the 5369// obvious condvar-mutex-flag triple. 5370// Another alternative that works quite well is pipes: 5371// Each PlatformEvent consists of a pipe-pair. 5372// The thread associated with the PlatformEvent 5373// calls park(), which reads from the input end of the pipe. 5374// Unpark() writes into the other end of the pipe. 5375// The write-side of the pipe must be set NDELAY. 5376// Unfortunately pipes consume a large # of handles. 5377// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5378// Using pipes for the 1st few threads might be workable, however. 5379// 5380// park() is permitted to return spuriously. 5381// Callers of park() should wrap the call to park() in 5382// an appropriate loop. A litmus test for the correct 5383// usage of park is the following: if park() were modified 5384// to immediately return 0 your code should still work, 5385// albeit degenerating to a spin loop. 5386// 5387// An interesting optimization for park() is to use a trylock() 5388// to attempt to acquire the mutex. If the trylock() fails 5389// then we know that a concurrent unpark() operation is in-progress. 5390// in that case the park() code could simply set _count to 0 5391// and return immediately. The subsequent park() operation *might* 5392// return immediately. That's harmless as the caller of park() is 5393// expected to loop. By using trylock() we will have avoided a 5394// avoided a context switch caused by contention on the per-thread mutex. 5395// 5396// TODO-FIXME: 5397// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5398// objectmonitor implementation. 5399// 2. Collapse the JSR166 parker event, and the 5400// objectmonitor ParkEvent into a single "Event" construct. 5401// 3. In park() and unpark() add: 5402// assert (Thread::current() == AssociatedWith). 5403// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5404// 1-out-of-N park() operations will return immediately. 5405// 5406// _Event transitions in park() 5407// -1 => -1 : illegal 5408// 1 => 0 : pass - return immediately 5409// 0 => -1 : block 5410// 5411// _Event serves as a restricted-range semaphore. 5412// 5413// Another possible encoding of _Event would be with 5414// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5415// 5416// TODO-FIXME: add DTRACE probes for: 5417// 1. Tx parks 5418// 2. Ty unparks Tx 5419// 3. Tx resumes from park 5420 5421 5422// value determined through experimentation 5423#define ROUNDINGFIX 11 5424 5425// utility to compute the abstime argument to timedwait. 5426// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5427 5428static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5429 // millis is the relative timeout time 5430 // abstime will be the absolute timeout time 5431 if (millis < 0) millis = 0; 5432 struct timeval now; 5433 int status = gettimeofday(&now, NULL); 5434 assert(status == 0, "gettimeofday"); 5435 jlong seconds = millis / 1000; 5436 jlong max_wait_period; 5437 5438 if (UseLWPSynchronization) { 5439 // forward port of fix for 4275818 (not sleeping long enough) 5440 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5441 // _lwp_cond_timedwait() used a round_down algorithm rather 5442 // than a round_up. For millis less than our roundfactor 5443 // it rounded down to 0 which doesn't meet the spec. 5444 // For millis > roundfactor we may return a bit sooner, but 5445 // since we can not accurately identify the patch level and 5446 // this has already been fixed in Solaris 9 and 8 we will 5447 // leave it alone rather than always rounding down. 5448 5449 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5450 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5451 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5452 max_wait_period = 21000000; 5453 } else { 5454 max_wait_period = 50000000; 5455 } 5456 millis %= 1000; 5457 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5458 seconds = max_wait_period; 5459 } 5460 abstime->tv_sec = now.tv_sec + seconds; 5461 long usec = now.tv_usec + millis * 1000; 5462 if (usec >= 1000000) { 5463 abstime->tv_sec += 1; 5464 usec -= 1000000; 5465 } 5466 abstime->tv_nsec = usec * 1000; 5467 return abstime; 5468} 5469 5470// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5471// Conceptually TryPark() should be equivalent to park(0). 5472 5473int os::PlatformEvent::TryPark() { 5474 for (;;) { 5475 const int v = _Event ; 5476 guarantee ((v == 0) || (v == 1), "invariant") ; 5477 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5478 } 5479} 5480 5481void os::PlatformEvent::park() { // AKA: down() 5482 // Invariant: Only the thread associated with the Event/PlatformEvent 5483 // may call park(). 5484 int v ; 5485 for (;;) { 5486 v = _Event ; 5487 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5488 } 5489 guarantee (v >= 0, "invariant") ; 5490 if (v == 0) { 5491 // Do this the hard way by blocking ... 5492 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5493 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5494 // Only for SPARC >= V8PlusA 5495#if defined(__sparc) && defined(COMPILER2) 5496 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5497#endif 5498 int status = os::Solaris::mutex_lock(_mutex); 5499 assert_status(status == 0, status, "mutex_lock"); 5500 guarantee (_nParked == 0, "invariant") ; 5501 ++ _nParked ; 5502 while (_Event < 0) { 5503 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5504 // Treat this the same as if the wait was interrupted 5505 // With usr/lib/lwp going to kernel, always handle ETIME 5506 status = os::Solaris::cond_wait(_cond, _mutex); 5507 if (status == ETIME) status = EINTR ; 5508 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5509 } 5510 -- _nParked ; 5511 _Event = 0 ; 5512 status = os::Solaris::mutex_unlock(_mutex); 5513 assert_status(status == 0, status, "mutex_unlock"); 5514 } 5515} 5516 5517int os::PlatformEvent::park(jlong millis) { 5518 guarantee (_nParked == 0, "invariant") ; 5519 int v ; 5520 for (;;) { 5521 v = _Event ; 5522 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5523 } 5524 guarantee (v >= 0, "invariant") ; 5525 if (v != 0) return OS_OK ; 5526 5527 int ret = OS_TIMEOUT; 5528 timestruc_t abst; 5529 compute_abstime (&abst, millis); 5530 5531 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5532 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5533 // Only for SPARC >= V8PlusA 5534#if defined(__sparc) && defined(COMPILER2) 5535 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5536#endif 5537 int status = os::Solaris::mutex_lock(_mutex); 5538 assert_status(status == 0, status, "mutex_lock"); 5539 guarantee (_nParked == 0, "invariant") ; 5540 ++ _nParked ; 5541 while (_Event < 0) { 5542 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5543 assert_status(status == 0 || status == EINTR || 5544 status == ETIME || status == ETIMEDOUT, 5545 status, "cond_timedwait"); 5546 if (!FilterSpuriousWakeups) break ; // previous semantics 5547 if (status == ETIME || status == ETIMEDOUT) break ; 5548 // We consume and ignore EINTR and spurious wakeups. 5549 } 5550 -- _nParked ; 5551 if (_Event >= 0) ret = OS_OK ; 5552 _Event = 0 ; 5553 status = os::Solaris::mutex_unlock(_mutex); 5554 assert_status(status == 0, status, "mutex_unlock"); 5555 return ret; 5556} 5557 5558void os::PlatformEvent::unpark() { 5559 int v, AnyWaiters; 5560 5561 // Increment _Event. 5562 // Another acceptable implementation would be to simply swap 1 5563 // into _Event: 5564 // if (Swap (&_Event, 1) < 0) { 5565 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5566 // if (AnyWaiters) cond_signal (_cond) ; 5567 // } 5568 5569 for (;;) { 5570 v = _Event ; 5571 if (v > 0) { 5572 // The LD of _Event could have reordered or be satisfied 5573 // by a read-aside from this processor's write buffer. 5574 // To avoid problems execute a barrier and then 5575 // ratify the value. A degenerate CAS() would also work. 5576 // Viz., CAS (v+0, &_Event, v) == v). 5577 OrderAccess::fence() ; 5578 if (_Event == v) return ; 5579 continue ; 5580 } 5581 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5582 } 5583 5584 // If the thread associated with the event was parked, wake it. 5585 if (v < 0) { 5586 int status ; 5587 // Wait for the thread assoc with the PlatformEvent to vacate. 5588 status = os::Solaris::mutex_lock(_mutex); 5589 assert_status(status == 0, status, "mutex_lock"); 5590 AnyWaiters = _nParked ; 5591 status = os::Solaris::mutex_unlock(_mutex); 5592 assert_status(status == 0, status, "mutex_unlock"); 5593 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5594 if (AnyWaiters != 0) { 5595 // We intentional signal *after* dropping the lock 5596 // to avoid a common class of futile wakeups. 5597 status = os::Solaris::cond_signal(_cond); 5598 assert_status(status == 0, status, "cond_signal"); 5599 } 5600 } 5601} 5602 5603// JSR166 5604// ------------------------------------------------------- 5605 5606/* 5607 * The solaris and linux implementations of park/unpark are fairly 5608 * conservative for now, but can be improved. They currently use a 5609 * mutex/condvar pair, plus _counter. 5610 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5611 * sets count to 1 and signals condvar. Only one thread ever waits 5612 * on the condvar. Contention seen when trying to park implies that someone 5613 * is unparking you, so don't wait. And spurious returns are fine, so there 5614 * is no need to track notifications. 5615 */ 5616 5617#define NANOSECS_PER_SEC 1000000000 5618#define NANOSECS_PER_MILLISEC 1000000 5619#define MAX_SECS 100000000 5620 5621/* 5622 * This code is common to linux and solaris and will be moved to a 5623 * common place in dolphin. 5624 * 5625 * The passed in time value is either a relative time in nanoseconds 5626 * or an absolute time in milliseconds. Either way it has to be unpacked 5627 * into suitable seconds and nanoseconds components and stored in the 5628 * given timespec structure. 5629 * Given time is a 64-bit value and the time_t used in the timespec is only 5630 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5631 * overflow if times way in the future are given. Further on Solaris versions 5632 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5633 * number of seconds, in abstime, is less than current_time + 100,000,000. 5634 * As it will be 28 years before "now + 100000000" will overflow we can 5635 * ignore overflow and just impose a hard-limit on seconds using the value 5636 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5637 * years from "now". 5638 */ 5639static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5640 assert (time > 0, "convertTime"); 5641 5642 struct timeval now; 5643 int status = gettimeofday(&now, NULL); 5644 assert(status == 0, "gettimeofday"); 5645 5646 time_t max_secs = now.tv_sec + MAX_SECS; 5647 5648 if (isAbsolute) { 5649 jlong secs = time / 1000; 5650 if (secs > max_secs) { 5651 absTime->tv_sec = max_secs; 5652 } 5653 else { 5654 absTime->tv_sec = secs; 5655 } 5656 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5657 } 5658 else { 5659 jlong secs = time / NANOSECS_PER_SEC; 5660 if (secs >= MAX_SECS) { 5661 absTime->tv_sec = max_secs; 5662 absTime->tv_nsec = 0; 5663 } 5664 else { 5665 absTime->tv_sec = now.tv_sec + secs; 5666 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5667 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5668 absTime->tv_nsec -= NANOSECS_PER_SEC; 5669 ++absTime->tv_sec; // note: this must be <= max_secs 5670 } 5671 } 5672 } 5673 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5674 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5675 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5676 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5677} 5678 5679void Parker::park(bool isAbsolute, jlong time) { 5680 5681 // Optional fast-path check: 5682 // Return immediately if a permit is available. 5683 if (_counter > 0) { 5684 _counter = 0 ; 5685 return ; 5686 } 5687 5688 // Optional fast-exit: Check interrupt before trying to wait 5689 Thread* thread = Thread::current(); 5690 assert(thread->is_Java_thread(), "Must be JavaThread"); 5691 JavaThread *jt = (JavaThread *)thread; 5692 if (Thread::is_interrupted(thread, false)) { 5693 return; 5694 } 5695 5696 // First, demultiplex/decode time arguments 5697 timespec absTime; 5698 if (time < 0) { // don't wait at all 5699 return; 5700 } 5701 if (time > 0) { 5702 // Warning: this code might be exposed to the old Solaris time 5703 // round-down bugs. Grep "roundingFix" for details. 5704 unpackTime(&absTime, isAbsolute, time); 5705 } 5706 5707 // Enter safepoint region 5708 // Beware of deadlocks such as 6317397. 5709 // The per-thread Parker:: _mutex is a classic leaf-lock. 5710 // In particular a thread must never block on the Threads_lock while 5711 // holding the Parker:: mutex. If safepoints are pending both the 5712 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5713 ThreadBlockInVM tbivm(jt); 5714 5715 // Don't wait if cannot get lock since interference arises from 5716 // unblocking. Also. check interrupt before trying wait 5717 if (Thread::is_interrupted(thread, false) || 5718 os::Solaris::mutex_trylock(_mutex) != 0) { 5719 return; 5720 } 5721 5722 int status ; 5723 5724 if (_counter > 0) { // no wait needed 5725 _counter = 0; 5726 status = os::Solaris::mutex_unlock(_mutex); 5727 assert (status == 0, "invariant") ; 5728 return; 5729 } 5730 5731#ifdef ASSERT 5732 // Don't catch signals while blocked; let the running threads have the signals. 5733 // (This allows a debugger to break into the running thread.) 5734 sigset_t oldsigs; 5735 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5736 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5737#endif 5738 5739 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5740 jt->set_suspend_equivalent(); 5741 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5742 5743 // Do this the hard way by blocking ... 5744 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5745 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5746 // Only for SPARC >= V8PlusA 5747#if defined(__sparc) && defined(COMPILER2) 5748 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5749#endif 5750 5751 if (time == 0) { 5752 status = os::Solaris::cond_wait (_cond, _mutex) ; 5753 } else { 5754 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5755 } 5756 // Note that an untimed cond_wait() can sometimes return ETIME on older 5757 // versions of the Solaris. 5758 assert_status(status == 0 || status == EINTR || 5759 status == ETIME || status == ETIMEDOUT, 5760 status, "cond_timedwait"); 5761 5762#ifdef ASSERT 5763 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5764#endif 5765 _counter = 0 ; 5766 status = os::Solaris::mutex_unlock(_mutex); 5767 assert_status(status == 0, status, "mutex_unlock") ; 5768 5769 // If externally suspended while waiting, re-suspend 5770 if (jt->handle_special_suspend_equivalent_condition()) { 5771 jt->java_suspend_self(); 5772 } 5773 5774} 5775 5776void Parker::unpark() { 5777 int s, status ; 5778 status = os::Solaris::mutex_lock (_mutex) ; 5779 assert (status == 0, "invariant") ; 5780 s = _counter; 5781 _counter = 1; 5782 status = os::Solaris::mutex_unlock (_mutex) ; 5783 assert (status == 0, "invariant") ; 5784 5785 if (s < 1) { 5786 status = os::Solaris::cond_signal (_cond) ; 5787 assert (status == 0, "invariant") ; 5788 } 5789} 5790 5791extern char** environ; 5792 5793// Run the specified command in a separate process. Return its exit value, 5794// or -1 on failure (e.g. can't fork a new process). 5795// Unlike system(), this function can be called from signal handler. It 5796// doesn't block SIGINT et al. 5797int os::fork_and_exec(char* cmd) { 5798 char * argv[4]; 5799 argv[0] = (char *)"sh"; 5800 argv[1] = (char *)"-c"; 5801 argv[2] = cmd; 5802 argv[3] = NULL; 5803 5804 // fork is async-safe, fork1 is not so can't use in signal handler 5805 pid_t pid; 5806 Thread* t = ThreadLocalStorage::get_thread_slow(); 5807 if (t != NULL && t->is_inside_signal_handler()) { 5808 pid = fork(); 5809 } else { 5810 pid = fork1(); 5811 } 5812 5813 if (pid < 0) { 5814 // fork failed 5815 warning("fork failed: %s", strerror(errno)); 5816 return -1; 5817 5818 } else if (pid == 0) { 5819 // child process 5820 5821 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5822 execve("/usr/bin/sh", argv, environ); 5823 5824 // execve failed 5825 _exit(-1); 5826 5827 } else { 5828 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5829 // care about the actual exit code, for now. 5830 5831 int status; 5832 5833 // Wait for the child process to exit. This returns immediately if 5834 // the child has already exited. */ 5835 while (waitpid(pid, &status, 0) < 0) { 5836 switch (errno) { 5837 case ECHILD: return 0; 5838 case EINTR: break; 5839 default: return -1; 5840 } 5841 } 5842 5843 if (WIFEXITED(status)) { 5844 // The child exited normally; get its exit code. 5845 return WEXITSTATUS(status); 5846 } else if (WIFSIGNALED(status)) { 5847 // The child exited because of a signal 5848 // The best value to return is 0x80 + signal number, 5849 // because that is what all Unix shells do, and because 5850 // it allows callers to distinguish between process exit and 5851 // process death by signal. 5852 return 0x80 + WTERMSIG(status); 5853 } else { 5854 // Unknown exit code; pass it through 5855 return status; 5856 } 5857 } 5858} 5859