os_solaris.cpp revision 144:e3729351c946
1/* 2 * Copyright 1997-2007 Sun Microsystems, Inc. All Rights Reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, 20 * CA 95054 USA or visit www.sun.com if you need additional information or 21 * have any questions. 22 * 23 */ 24 25// do not include precompiled header file 26# include "incls/_os_solaris.cpp.incl" 27 28// put OS-includes here 29# include <dlfcn.h> 30# include <errno.h> 31# include <link.h> 32# include <poll.h> 33# include <pthread.h> 34# include <pwd.h> 35# include <schedctl.h> 36# include <setjmp.h> 37# include <signal.h> 38# include <stdio.h> 39# include <alloca.h> 40# include <sys/filio.h> 41# include <sys/ipc.h> 42# include <sys/lwp.h> 43# include <sys/machelf.h> // for elf Sym structure used by dladdr1 44# include <sys/mman.h> 45# include <sys/processor.h> 46# include <sys/procset.h> 47# include <sys/pset.h> 48# include <sys/resource.h> 49# include <sys/shm.h> 50# include <sys/socket.h> 51# include <sys/stat.h> 52# include <sys/systeminfo.h> 53# include <sys/time.h> 54# include <sys/times.h> 55# include <sys/types.h> 56# include <sys/wait.h> 57# include <sys/utsname.h> 58# include <thread.h> 59# include <unistd.h> 60# include <sys/priocntl.h> 61# include <sys/rtpriocntl.h> 62# include <sys/tspriocntl.h> 63# include <sys/iapriocntl.h> 64# include <sys/loadavg.h> 65# include <string.h> 66 67# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 68# include <sys/procfs.h> // see comment in <sys/procfs.h> 69 70#define MAX_PATH (2 * K) 71 72// for timer info max values which include all bits 73#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 74 75#ifdef _GNU_SOURCE 76// See bug #6514594 77extern "C" int madvise(caddr_t, size_t, int); 78extern "C" int memcntl(caddr_t addr, size_t len, int cmd, caddr_t arg, 79 int attr, int mask); 80#endif //_GNU_SOURCE 81 82/* 83 MPSS Changes Start. 84 The JVM binary needs to be built and run on pre-Solaris 9 85 systems, but the constants needed by MPSS are only in Solaris 9 86 header files. They are textually replicated here to allow 87 building on earlier systems. Once building on Solaris 8 is 88 no longer a requirement, these #defines can be replaced by ordinary 89 system .h inclusion. 90 91 In earlier versions of the JDK and Solaris, we used ISM for large pages. 92 But ISM requires shared memory to achieve this and thus has many caveats. 93 MPSS is a fully transparent and is a cleaner way to get large pages. 94 Although we still require keeping ISM for backward compatiblitiy as well as 95 giving the opportunity to use large pages on older systems it is 96 recommended that MPSS be used for Solaris 9 and above. 97 98*/ 99 100#ifndef MC_HAT_ADVISE 101 102struct memcntl_mha { 103 uint_t mha_cmd; /* command(s) */ 104 uint_t mha_flags; 105 size_t mha_pagesize; 106}; 107#define MC_HAT_ADVISE 7 /* advise hat map size */ 108#define MHA_MAPSIZE_VA 0x1 /* set preferred page size */ 109#define MAP_ALIGN 0x200 /* addr specifies alignment */ 110 111#endif 112// MPSS Changes End. 113 114 115// Here are some liblgrp types from sys/lgrp_user.h to be able to 116// compile on older systems without this header file. 117 118#ifndef MADV_ACCESS_LWP 119# define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 120#endif 121#ifndef MADV_ACCESS_MANY 122# define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 123#endif 124 125#ifndef LGRP_RSRC_CPU 126# define LGRP_RSRC_CPU 0 /* CPU resources */ 127#endif 128#ifndef LGRP_RSRC_MEM 129# define LGRP_RSRC_MEM 1 /* memory resources */ 130#endif 131 132// Some more macros from sys/mman.h that are not present in Solaris 8. 133 134#ifndef MAX_MEMINFO_CNT 135/* 136 * info_req request type definitions for meminfo 137 * request types starting with MEMINFO_V are used for Virtual addresses 138 * and should not be mixed with MEMINFO_PLGRP which is targeted for Physical 139 * addresses 140 */ 141# define MEMINFO_SHIFT 16 142# define MEMINFO_MASK (0xFF << MEMINFO_SHIFT) 143# define MEMINFO_VPHYSICAL (0x01 << MEMINFO_SHIFT) /* get physical addr */ 144# define MEMINFO_VLGRP (0x02 << MEMINFO_SHIFT) /* get lgroup */ 145# define MEMINFO_VPAGESIZE (0x03 << MEMINFO_SHIFT) /* size of phys page */ 146# define MEMINFO_VREPLCNT (0x04 << MEMINFO_SHIFT) /* no. of replica */ 147# define MEMINFO_VREPL (0x05 << MEMINFO_SHIFT) /* physical replica */ 148# define MEMINFO_VREPL_LGRP (0x06 << MEMINFO_SHIFT) /* lgrp of replica */ 149# define MEMINFO_PLGRP (0x07 << MEMINFO_SHIFT) /* lgroup for paddr */ 150 151/* maximum number of addresses meminfo() can process at a time */ 152# define MAX_MEMINFO_CNT 256 153 154/* maximum number of request types */ 155# define MAX_MEMINFO_REQ 31 156#endif 157 158// see thr_setprio(3T) for the basis of these numbers 159#define MinimumPriority 0 160#define NormalPriority 64 161#define MaximumPriority 127 162 163// Values for ThreadPriorityPolicy == 1 164int prio_policy1[MaxPriority+1] = { -99999, 0, 16, 32, 48, 64, 165 80, 96, 112, 124, 127 }; 166 167// System parameters used internally 168static clock_t clock_tics_per_sec = 100; 169 170// For diagnostics to print a message once. see run_periodic_checks 171static bool check_addr0_done = false; 172static sigset_t check_signal_done; 173static bool check_signals = true; 174 175address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 176address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 177 178address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 179 180 181// "default" initializers for missing libc APIs 182extern "C" { 183 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 184 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 185 186 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 187 static int lwp_cond_destroy(cond_t *cv) { return 0; } 188} 189 190// "default" initializers for pthread-based synchronization 191extern "C" { 192 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 193 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 194} 195 196// Thread Local Storage 197// This is common to all Solaris platforms so it is defined here, 198// in this common file. 199// The declarations are in the os_cpu threadLS*.hpp files. 200// 201// Static member initialization for TLS 202Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 203 204#ifndef PRODUCT 205#define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 206 207int ThreadLocalStorage::_tcacheHit = 0; 208int ThreadLocalStorage::_tcacheMiss = 0; 209 210void ThreadLocalStorage::print_statistics() { 211 int total = _tcacheMiss+_tcacheHit; 212 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 213 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 214} 215#undef _PCT 216#endif // PRODUCT 217 218Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 219 int index) { 220 Thread *thread = get_thread_slow(); 221 if (thread != NULL) { 222 address sp = os::current_stack_pointer(); 223 guarantee(thread->_stack_base == NULL || 224 (sp <= thread->_stack_base && 225 sp >= thread->_stack_base - thread->_stack_size) || 226 is_error_reported(), 227 "sp must be inside of selected thread stack"); 228 229 thread->_self_raw_id = raw_id; // mark for quick retrieval 230 _get_thread_cache[ index ] = thread; 231 } 232 return thread; 233} 234 235 236static const double all_zero[ sizeof(Thread) / sizeof(double) + 1 ] = {0}; 237#define NO_CACHED_THREAD ((Thread*)all_zero) 238 239void ThreadLocalStorage::pd_set_thread(Thread* thread) { 240 241 // Store the new value before updating the cache to prevent a race 242 // between get_thread_via_cache_slowly() and this store operation. 243 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 244 245 // Update thread cache with new thread if setting on thread create, 246 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 247 uintptr_t raw = pd_raw_thread_id(); 248 int ix = pd_cache_index(raw); 249 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 250} 251 252void ThreadLocalStorage::pd_init() { 253 for (int i = 0; i < _pd_cache_size; i++) { 254 _get_thread_cache[i] = NO_CACHED_THREAD; 255 } 256} 257 258// Invalidate all the caches (happens to be the same as pd_init). 259void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 260 261#undef NO_CACHED_THREAD 262 263// END Thread Local Storage 264 265static inline size_t adjust_stack_size(address base, size_t size) { 266 if ((ssize_t)size < 0) { 267 // 4759953: Compensate for ridiculous stack size. 268 size = max_intx; 269 } 270 if (size > (size_t)base) { 271 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 272 size = (size_t)base; 273 } 274 return size; 275} 276 277static inline stack_t get_stack_info() { 278 stack_t st; 279 int retval = thr_stksegment(&st); 280 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 281 assert(retval == 0, "incorrect return value from thr_stksegment"); 282 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 283 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 284 return st; 285} 286 287address os::current_stack_base() { 288 int r = thr_main() ; 289 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 290 bool is_primordial_thread = r; 291 292 // Workaround 4352906, avoid calls to thr_stksegment by 293 // thr_main after the first one (it looks like we trash 294 // some data, causing the value for ss_sp to be incorrect). 295 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 296 stack_t st = get_stack_info(); 297 if (is_primordial_thread) { 298 // cache initial value of stack base 299 os::Solaris::_main_stack_base = (address)st.ss_sp; 300 } 301 return (address)st.ss_sp; 302 } else { 303 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 304 return os::Solaris::_main_stack_base; 305 } 306} 307 308size_t os::current_stack_size() { 309 size_t size; 310 311 int r = thr_main() ; 312 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 313 if(!r) { 314 size = get_stack_info().ss_size; 315 } else { 316 struct rlimit limits; 317 getrlimit(RLIMIT_STACK, &limits); 318 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 319 } 320 // base may not be page aligned 321 address base = current_stack_base(); 322 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 323 return (size_t)(base - bottom); 324} 325 326// interruptible infrastructure 327 328// setup_interruptible saves the thread state before going into an 329// interruptible system call. 330// The saved state is used to restore the thread to 331// its former state whether or not an interrupt is received. 332// Used by classloader os::read 333// hpi calls skip this layer and stay in _thread_in_native 334 335void os::Solaris::setup_interruptible(JavaThread* thread) { 336 337 JavaThreadState thread_state = thread->thread_state(); 338 339 assert(thread_state != _thread_blocked, "Coming from the wrong thread"); 340 assert(thread_state != _thread_in_native, "Native threads skip setup_interruptible"); 341 OSThread* osthread = thread->osthread(); 342 osthread->set_saved_interrupt_thread_state(thread_state); 343 thread->frame_anchor()->make_walkable(thread); 344 ThreadStateTransition::transition(thread, thread_state, _thread_blocked); 345} 346 347// Version of setup_interruptible() for threads that are already in 348// _thread_blocked. Used by os_sleep(). 349void os::Solaris::setup_interruptible_already_blocked(JavaThread* thread) { 350 thread->frame_anchor()->make_walkable(thread); 351} 352 353JavaThread* os::Solaris::setup_interruptible() { 354 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 355 setup_interruptible(thread); 356 return thread; 357} 358 359void os::Solaris::try_enable_extended_io() { 360 typedef int (*enable_extended_FILE_stdio_t)(int, int); 361 362 if (!UseExtendedFileIO) { 363 return; 364 } 365 366 enable_extended_FILE_stdio_t enabler = 367 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 368 "enable_extended_FILE_stdio"); 369 if (enabler) { 370 enabler(-1, -1); 371 } 372} 373 374 375#ifdef ASSERT 376 377JavaThread* os::Solaris::setup_interruptible_native() { 378 JavaThread* thread = (JavaThread*)ThreadLocalStorage::thread(); 379 JavaThreadState thread_state = thread->thread_state(); 380 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 381 return thread; 382} 383 384void os::Solaris::cleanup_interruptible_native(JavaThread* thread) { 385 JavaThreadState thread_state = thread->thread_state(); 386 assert(thread_state == _thread_in_native, "Assumed thread_in_native"); 387} 388#endif 389 390// cleanup_interruptible reverses the effects of setup_interruptible 391// setup_interruptible_already_blocked() does not need any cleanup. 392 393void os::Solaris::cleanup_interruptible(JavaThread* thread) { 394 OSThread* osthread = thread->osthread(); 395 396 ThreadStateTransition::transition(thread, _thread_blocked, osthread->saved_interrupt_thread_state()); 397} 398 399// I/O interruption related counters called in _INTERRUPTIBLE 400 401void os::Solaris::bump_interrupted_before_count() { 402 RuntimeService::record_interrupted_before_count(); 403} 404 405void os::Solaris::bump_interrupted_during_count() { 406 RuntimeService::record_interrupted_during_count(); 407} 408 409static int _processors_online = 0; 410 411 jint os::Solaris::_os_thread_limit = 0; 412volatile jint os::Solaris::_os_thread_count = 0; 413 414julong os::available_memory() { 415 return Solaris::available_memory(); 416} 417 418julong os::Solaris::available_memory() { 419 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 420} 421 422julong os::Solaris::_physical_memory = 0; 423 424julong os::physical_memory() { 425 return Solaris::physical_memory(); 426} 427 428julong os::allocatable_physical_memory(julong size) { 429#ifdef _LP64 430 return size; 431#else 432 julong result = MIN2(size, (julong)3835*M); 433 if (!is_allocatable(result)) { 434 // Memory allocations will be aligned but the alignment 435 // is not known at this point. Alignments will 436 // be at most to LargePageSizeInBytes. Protect 437 // allocations from alignments up to illegal 438 // values. If at this point 2G is illegal. 439 julong reasonable_size = (julong)2*G - 2 * LargePageSizeInBytes; 440 result = MIN2(size, reasonable_size); 441 } 442 return result; 443#endif 444} 445 446static hrtime_t first_hrtime = 0; 447static const hrtime_t hrtime_hz = 1000*1000*1000; 448const int LOCK_BUSY = 1; 449const int LOCK_FREE = 0; 450const int LOCK_INVALID = -1; 451static volatile hrtime_t max_hrtime = 0; 452static volatile int max_hrtime_lock = LOCK_FREE; // Update counter with LSB as lock-in-progress 453 454 455void os::Solaris::initialize_system_info() { 456 _processor_count = sysconf(_SC_NPROCESSORS_CONF); 457 _processors_online = sysconf (_SC_NPROCESSORS_ONLN); 458 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * (julong)sysconf(_SC_PAGESIZE); 459} 460 461int os::active_processor_count() { 462 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 463 pid_t pid = getpid(); 464 psetid_t pset = PS_NONE; 465 // Are we running in a processor set? 466 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 467 if (pset != PS_NONE) { 468 uint_t pset_cpus; 469 // Query number of cpus in processor set 470 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 471 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 472 _processors_online = pset_cpus; 473 return pset_cpus; 474 } 475 } 476 } 477 // Otherwise return number of online cpus 478 return online_cpus; 479} 480 481static bool find_processors_in_pset(psetid_t pset, 482 processorid_t** id_array, 483 uint_t* id_length) { 484 bool result = false; 485 // Find the number of processors in the processor set. 486 if (pset_info(pset, NULL, id_length, NULL) == 0) { 487 // Make up an array to hold their ids. 488 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 489 // Fill in the array with their processor ids. 490 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 491 result = true; 492 } 493 } 494 return result; 495} 496 497// Callers of find_processors_online() must tolerate imprecise results -- 498// the system configuration can change asynchronously because of DR 499// or explicit psradm operations. 500// 501// We also need to take care that the loop (below) terminates as the 502// number of processors online can change between the _SC_NPROCESSORS_ONLN 503// request and the loop that builds the list of processor ids. Unfortunately 504// there's no reliable way to determine the maximum valid processor id, 505// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 506// man pages, which claim the processor id set is "sparse, but 507// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 508// exit the loop. 509// 510// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 511// not available on S8.0. 512 513static bool find_processors_online(processorid_t** id_array, 514 uint* id_length) { 515 const processorid_t MAX_PROCESSOR_ID = 100000 ; 516 // Find the number of processors online. 517 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 518 // Make up an array to hold their ids. 519 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length); 520 // Processors need not be numbered consecutively. 521 long found = 0; 522 processorid_t next = 0; 523 while (found < *id_length && next < MAX_PROCESSOR_ID) { 524 processor_info_t info; 525 if (processor_info(next, &info) == 0) { 526 // NB, PI_NOINTR processors are effectively online ... 527 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 528 (*id_array)[found] = next; 529 found += 1; 530 } 531 } 532 next += 1; 533 } 534 if (found < *id_length) { 535 // The loop above didn't identify the expected number of processors. 536 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 537 // and re-running the loop, above, but there's no guarantee of progress 538 // if the system configuration is in flux. Instead, we just return what 539 // we've got. Note that in the worst case find_processors_online() could 540 // return an empty set. (As a fall-back in the case of the empty set we 541 // could just return the ID of the current processor). 542 *id_length = found ; 543 } 544 545 return true; 546} 547 548static bool assign_distribution(processorid_t* id_array, 549 uint id_length, 550 uint* distribution, 551 uint distribution_length) { 552 // We assume we can assign processorid_t's to uint's. 553 assert(sizeof(processorid_t) == sizeof(uint), 554 "can't convert processorid_t to uint"); 555 // Quick check to see if we won't succeed. 556 if (id_length < distribution_length) { 557 return false; 558 } 559 // Assign processor ids to the distribution. 560 // Try to shuffle processors to distribute work across boards, 561 // assuming 4 processors per board. 562 const uint processors_per_board = ProcessDistributionStride; 563 // Find the maximum processor id. 564 processorid_t max_id = 0; 565 for (uint m = 0; m < id_length; m += 1) { 566 max_id = MAX2(max_id, id_array[m]); 567 } 568 // The next id, to limit loops. 569 const processorid_t limit_id = max_id + 1; 570 // Make up markers for available processors. 571 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id); 572 for (uint c = 0; c < limit_id; c += 1) { 573 available_id[c] = false; 574 } 575 for (uint a = 0; a < id_length; a += 1) { 576 available_id[id_array[a]] = true; 577 } 578 // Step by "boards", then by "slot", copying to "assigned". 579 // NEEDS_CLEANUP: The assignment of processors should be stateful, 580 // remembering which processors have been assigned by 581 // previous calls, etc., so as to distribute several 582 // independent calls of this method. What we'd like is 583 // It would be nice to have an API that let us ask 584 // how many processes are bound to a processor, 585 // but we don't have that, either. 586 // In the short term, "board" is static so that 587 // subsequent distributions don't all start at board 0. 588 static uint board = 0; 589 uint assigned = 0; 590 // Until we've found enough processors .... 591 while (assigned < distribution_length) { 592 // ... find the next available processor in the board. 593 for (uint slot = 0; slot < processors_per_board; slot += 1) { 594 uint try_id = board * processors_per_board + slot; 595 if ((try_id < limit_id) && (available_id[try_id] == true)) { 596 distribution[assigned] = try_id; 597 available_id[try_id] = false; 598 assigned += 1; 599 break; 600 } 601 } 602 board += 1; 603 if (board * processors_per_board + 0 >= limit_id) { 604 board = 0; 605 } 606 } 607 if (available_id != NULL) { 608 FREE_C_HEAP_ARRAY(bool, available_id); 609 } 610 return true; 611} 612 613bool os::distribute_processes(uint length, uint* distribution) { 614 bool result = false; 615 // Find the processor id's of all the available CPUs. 616 processorid_t* id_array = NULL; 617 uint id_length = 0; 618 // There are some races between querying information and using it, 619 // since processor sets can change dynamically. 620 psetid_t pset = PS_NONE; 621 // Are we running in a processor set? 622 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 623 result = find_processors_in_pset(pset, &id_array, &id_length); 624 } else { 625 result = find_processors_online(&id_array, &id_length); 626 } 627 if (result == true) { 628 if (id_length >= length) { 629 result = assign_distribution(id_array, id_length, distribution, length); 630 } else { 631 result = false; 632 } 633 } 634 if (id_array != NULL) { 635 FREE_C_HEAP_ARRAY(processorid_t, id_array); 636 } 637 return result; 638} 639 640bool os::bind_to_processor(uint processor_id) { 641 // We assume that a processorid_t can be stored in a uint. 642 assert(sizeof(uint) == sizeof(processorid_t), 643 "can't convert uint to processorid_t"); 644 int bind_result = 645 processor_bind(P_LWPID, // bind LWP. 646 P_MYID, // bind current LWP. 647 (processorid_t) processor_id, // id. 648 NULL); // don't return old binding. 649 return (bind_result == 0); 650} 651 652bool os::getenv(const char* name, char* buffer, int len) { 653 char* val = ::getenv( name ); 654 if ( val == NULL 655 || strlen(val) + 1 > len ) { 656 if (len > 0) buffer[0] = 0; // return a null string 657 return false; 658 } 659 strcpy( buffer, val ); 660 return true; 661} 662 663 664// Return true if user is running as root. 665 666bool os::have_special_privileges() { 667 static bool init = false; 668 static bool privileges = false; 669 if (!init) { 670 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 671 init = true; 672 } 673 return privileges; 674} 675 676 677static char* get_property(char* name, char* buffer, int buffer_size) { 678 if (os::getenv(name, buffer, buffer_size)) { 679 return buffer; 680 } 681 static char empty[] = ""; 682 return empty; 683} 684 685 686void os::init_system_properties_values() { 687 char arch[12]; 688 sysinfo(SI_ARCHITECTURE, arch, sizeof(arch)); 689 690 // The next steps are taken in the product version: 691 // 692 // Obtain the JAVA_HOME value from the location of libjvm[_g].so. 693 // This library should be located at: 694 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm[_g].so. 695 // 696 // If "/jre/lib/" appears at the right place in the path, then we 697 // assume libjvm[_g].so is installed in a JDK and we use this path. 698 // 699 // Otherwise exit with message: "Could not create the Java virtual machine." 700 // 701 // The following extra steps are taken in the debugging version: 702 // 703 // If "/jre/lib/" does NOT appear at the right place in the path 704 // instead of exit check for $JAVA_HOME environment variable. 705 // 706 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 707 // then we append a fake suffix "hotspot/libjvm[_g].so" to this path so 708 // it looks like libjvm[_g].so is installed there 709 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm[_g].so. 710 // 711 // Otherwise exit. 712 // 713 // Important note: if the location of libjvm.so changes this 714 // code needs to be changed accordingly. 715 716 // The next few definitions allow the code to be verbatim: 717#define malloc(n) (char*)NEW_C_HEAP_ARRAY(char, (n)) 718#define free(p) FREE_C_HEAP_ARRAY(char, p) 719#define getenv(n) ::getenv(n) 720 721#define EXTENSIONS_DIR "/lib/ext" 722#define ENDORSED_DIR "/lib/endorsed" 723#define COMMON_DIR "/usr/jdk/packages" 724 725 { 726 /* sysclasspath, java_home, dll_dir */ 727 { 728 char *home_path; 729 char *dll_path; 730 char *pslash; 731 char buf[MAXPATHLEN]; 732 os::jvm_path(buf, sizeof(buf)); 733 734 // Found the full path to libjvm.so. 735 // Now cut the path to <java_home>/jre if we can. 736 *(strrchr(buf, '/')) = '\0'; /* get rid of /libjvm.so */ 737 pslash = strrchr(buf, '/'); 738 if (pslash != NULL) 739 *pslash = '\0'; /* get rid of /{client|server|hotspot} */ 740 dll_path = malloc(strlen(buf) + 1); 741 if (dll_path == NULL) 742 return; 743 strcpy(dll_path, buf); 744 Arguments::set_dll_dir(dll_path); 745 746 if (pslash != NULL) { 747 pslash = strrchr(buf, '/'); 748 if (pslash != NULL) { 749 *pslash = '\0'; /* get rid of /<arch> */ 750 pslash = strrchr(buf, '/'); 751 if (pslash != NULL) 752 *pslash = '\0'; /* get rid of /lib */ 753 } 754 } 755 756 home_path = malloc(strlen(buf) + 1); 757 if (home_path == NULL) 758 return; 759 strcpy(home_path, buf); 760 Arguments::set_java_home(home_path); 761 762 if (!set_boot_path('/', ':')) 763 return; 764 } 765 766 /* 767 * Where to look for native libraries 768 */ 769 { 770 // Use dlinfo() to determine the correct java.library.path. 771 // 772 // If we're launched by the Java launcher, and the user 773 // does not set java.library.path explicitly on the commandline, 774 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 775 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 776 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 777 // /usr/lib), which is exactly what we want. 778 // 779 // If the user does set java.library.path, it completely 780 // overwrites this setting, and always has. 781 // 782 // If we're not launched by the Java launcher, we may 783 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 784 // settings. Again, dlinfo does exactly what we want. 785 786 Dl_serinfo _info, *info = &_info; 787 Dl_serpath *path; 788 char* library_path; 789 char *common_path; 790 int i; 791 792 // determine search path count and required buffer size 793 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 794 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 795 } 796 797 // allocate new buffer and initialize 798 info = (Dl_serinfo*)malloc(_info.dls_size); 799 if (info == NULL) { 800 vm_exit_out_of_memory(_info.dls_size, 801 "init_system_properties_values info"); 802 } 803 info->dls_size = _info.dls_size; 804 info->dls_cnt = _info.dls_cnt; 805 806 // obtain search path information 807 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 808 free(info); 809 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 810 } 811 812 path = &info->dls_serpath[0]; 813 814 // Note: Due to a legacy implementation, most of the library path 815 // is set in the launcher. This was to accomodate linking restrictions 816 // on legacy Solaris implementations (which are no longer supported). 817 // Eventually, all the library path setting will be done here. 818 // 819 // However, to prevent the proliferation of improperly built native 820 // libraries, the new path component /usr/jdk/packages is added here. 821 822 // Determine the actual CPU architecture. 823 char cpu_arch[12]; 824 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 825#ifdef _LP64 826 // If we are a 64-bit vm, perform the following translations: 827 // sparc -> sparcv9 828 // i386 -> amd64 829 if (strcmp(cpu_arch, "sparc") == 0) 830 strcat(cpu_arch, "v9"); 831 else if (strcmp(cpu_arch, "i386") == 0) 832 strcpy(cpu_arch, "amd64"); 833#endif 834 835 // Construct the invariant part of ld_library_path. Note that the 836 // space for the colon and the trailing null are provided by the 837 // nulls included by the sizeof operator. 838 size_t bufsize = sizeof(COMMON_DIR) + sizeof("/lib/") + strlen(cpu_arch); 839 common_path = malloc(bufsize); 840 if (common_path == NULL) { 841 free(info); 842 vm_exit_out_of_memory(bufsize, 843 "init_system_properties_values common_path"); 844 } 845 sprintf(common_path, COMMON_DIR "/lib/%s", cpu_arch); 846 847 // struct size is more than sufficient for the path components obtained 848 // through the dlinfo() call, so only add additional space for the path 849 // components explicitly added here. 850 bufsize = info->dls_size + strlen(common_path); 851 library_path = malloc(bufsize); 852 if (library_path == NULL) { 853 free(info); 854 free(common_path); 855 vm_exit_out_of_memory(bufsize, 856 "init_system_properties_values library_path"); 857 } 858 library_path[0] = '\0'; 859 860 // Construct the desired Java library path from the linker's library 861 // search path. 862 // 863 // For compatibility, it is optimal that we insert the additional path 864 // components specific to the Java VM after those components specified 865 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 866 // infrastructure. 867 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it 868 strcpy(library_path, common_path); 869 } else { 870 int inserted = 0; 871 for (i = 0; i < info->dls_cnt; i++, path++) { 872 uint_t flags = path->dls_flags & LA_SER_MASK; 873 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 874 strcat(library_path, common_path); 875 strcat(library_path, os::path_separator()); 876 inserted = 1; 877 } 878 strcat(library_path, path->dls_name); 879 strcat(library_path, os::path_separator()); 880 } 881 // eliminate trailing path separator 882 library_path[strlen(library_path)-1] = '\0'; 883 } 884 885 // happens before argument parsing - can't use a trace flag 886 // tty->print_raw("init_system_properties_values: native lib path: "); 887 // tty->print_raw_cr(library_path); 888 889 // callee copies into its own buffer 890 Arguments::set_library_path(library_path); 891 892 free(common_path); 893 free(library_path); 894 free(info); 895 } 896 897 /* 898 * Extensions directories. 899 * 900 * Note that the space for the colon and the trailing null are provided 901 * by the nulls included by the sizeof operator (so actually one byte more 902 * than necessary is allocated). 903 */ 904 { 905 char *buf = (char *) malloc(strlen(Arguments::get_java_home()) + 906 sizeof(EXTENSIONS_DIR) + sizeof(COMMON_DIR) + 907 sizeof(EXTENSIONS_DIR)); 908 sprintf(buf, "%s" EXTENSIONS_DIR ":" COMMON_DIR EXTENSIONS_DIR, 909 Arguments::get_java_home()); 910 Arguments::set_ext_dirs(buf); 911 } 912 913 /* Endorsed standards default directory. */ 914 { 915 char * buf = malloc(strlen(Arguments::get_java_home()) + sizeof(ENDORSED_DIR)); 916 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 917 Arguments::set_endorsed_dirs(buf); 918 } 919 } 920 921#undef malloc 922#undef free 923#undef getenv 924#undef EXTENSIONS_DIR 925#undef ENDORSED_DIR 926#undef COMMON_DIR 927 928} 929 930void os::breakpoint() { 931 BREAKPOINT; 932} 933 934bool os::obsolete_option(const JavaVMOption *option) 935{ 936 if (!strncmp(option->optionString, "-Xt", 3)) { 937 return true; 938 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 939 return true; 940 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 941 return true; 942 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 943 return true; 944 } 945 return false; 946} 947 948bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 949 address stackStart = (address)thread->stack_base(); 950 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 951 if (sp < stackStart && sp >= stackEnd ) return true; 952 return false; 953} 954 955extern "C" void breakpoint() { 956 // use debugger to set breakpoint here 957} 958 959// Returns an estimate of the current stack pointer. Result must be guaranteed to 960// point into the calling threads stack, and be no lower than the current stack 961// pointer. 962address os::current_stack_pointer() { 963 volatile int dummy; 964 address sp = (address)&dummy + 8; // %%%% need to confirm if this is right 965 return sp; 966} 967 968static thread_t main_thread; 969 970// Thread start routine for all new Java threads 971extern "C" void* java_start(void* thread_addr) { 972 // Try to randomize the cache line index of hot stack frames. 973 // This helps when threads of the same stack traces evict each other's 974 // cache lines. The threads can be either from the same JVM instance, or 975 // from different JVM instances. The benefit is especially true for 976 // processors with hyperthreading technology. 977 static int counter = 0; 978 int pid = os::current_process_id(); 979 alloca(((pid ^ counter++) & 7) * 128); 980 981 int prio; 982 Thread* thread = (Thread*)thread_addr; 983 OSThread* osthr = thread->osthread(); 984 985 osthr->set_lwp_id( _lwp_self() ); // Store lwp in case we are bound 986 thread->_schedctl = (void *) schedctl_init () ; 987 988 if (UseNUMA) { 989 int lgrp_id = os::numa_get_group_id(); 990 if (lgrp_id != -1) { 991 thread->set_lgrp_id(lgrp_id); 992 } 993 } 994 995 // If the creator called set priority before we started, 996 // we need to call set priority now that we have an lwp. 997 // Get the priority from libthread and set the priority 998 // for the new Solaris lwp. 999 if ( osthr->thread_id() != -1 ) { 1000 if ( UseThreadPriorities ) { 1001 thr_getprio(osthr->thread_id(), &prio); 1002 if (ThreadPriorityVerbose) { 1003 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT ", setting priority: %d\n", 1004 osthr->thread_id(), osthr->lwp_id(), prio ); 1005 } 1006 os::set_native_priority(thread, prio); 1007 } 1008 } else if (ThreadPriorityVerbose) { 1009 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 1010 } 1011 1012 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 1013 1014 // initialize signal mask for this thread 1015 os::Solaris::hotspot_sigmask(thread); 1016 1017 thread->run(); 1018 1019 // One less thread is executing 1020 // When the VMThread gets here, the main thread may have already exited 1021 // which frees the CodeHeap containing the Atomic::dec code 1022 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 1023 Atomic::dec(&os::Solaris::_os_thread_count); 1024 } 1025 1026 if (UseDetachedThreads) { 1027 thr_exit(NULL); 1028 ShouldNotReachHere(); 1029 } 1030 return NULL; 1031} 1032 1033static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 1034 // Allocate the OSThread object 1035 OSThread* osthread = new OSThread(NULL, NULL); 1036 if (osthread == NULL) return NULL; 1037 1038 // Store info on the Solaris thread into the OSThread 1039 osthread->set_thread_id(thread_id); 1040 osthread->set_lwp_id(_lwp_self()); 1041 thread->_schedctl = (void *) schedctl_init () ; 1042 1043 if (UseNUMA) { 1044 int lgrp_id = os::numa_get_group_id(); 1045 if (lgrp_id != -1) { 1046 thread->set_lgrp_id(lgrp_id); 1047 } 1048 } 1049 1050 if ( ThreadPriorityVerbose ) { 1051 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 1052 osthread->thread_id(), osthread->lwp_id() ); 1053 } 1054 1055 // Initial thread state is INITIALIZED, not SUSPENDED 1056 osthread->set_state(INITIALIZED); 1057 1058 return osthread; 1059} 1060 1061void os::Solaris::hotspot_sigmask(Thread* thread) { 1062 1063 //Save caller's signal mask 1064 sigset_t sigmask; 1065 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 1066 OSThread *osthread = thread->osthread(); 1067 osthread->set_caller_sigmask(sigmask); 1068 1069 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 1070 if (!ReduceSignalUsage) { 1071 if (thread->is_VM_thread()) { 1072 // Only the VM thread handles BREAK_SIGNAL ... 1073 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 1074 } else { 1075 // ... all other threads block BREAK_SIGNAL 1076 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 1077 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 1078 } 1079 } 1080} 1081 1082bool os::create_attached_thread(JavaThread* thread) { 1083#ifdef ASSERT 1084 thread->verify_not_published(); 1085#endif 1086 OSThread* osthread = create_os_thread(thread, thr_self()); 1087 if (osthread == NULL) { 1088 return false; 1089 } 1090 1091 // Initial thread state is RUNNABLE 1092 osthread->set_state(RUNNABLE); 1093 thread->set_osthread(osthread); 1094 1095 // initialize signal mask for this thread 1096 // and save the caller's signal mask 1097 os::Solaris::hotspot_sigmask(thread); 1098 1099 return true; 1100} 1101 1102bool os::create_main_thread(JavaThread* thread) { 1103#ifdef ASSERT 1104 thread->verify_not_published(); 1105#endif 1106 if (_starting_thread == NULL) { 1107 _starting_thread = create_os_thread(thread, main_thread); 1108 if (_starting_thread == NULL) { 1109 return false; 1110 } 1111 } 1112 1113 // The primodial thread is runnable from the start 1114 _starting_thread->set_state(RUNNABLE); 1115 1116 thread->set_osthread(_starting_thread); 1117 1118 // initialize signal mask for this thread 1119 // and save the caller's signal mask 1120 os::Solaris::hotspot_sigmask(thread); 1121 1122 return true; 1123} 1124 1125// _T2_libthread is true if we believe we are running with the newer 1126// SunSoft lwp/libthread.so (2.8 patch, 2.9 default) 1127bool os::Solaris::_T2_libthread = false; 1128 1129bool os::create_thread(Thread* thread, ThreadType thr_type, size_t stack_size) { 1130 // Allocate the OSThread object 1131 OSThread* osthread = new OSThread(NULL, NULL); 1132 if (osthread == NULL) { 1133 return false; 1134 } 1135 1136 if ( ThreadPriorityVerbose ) { 1137 char *thrtyp; 1138 switch ( thr_type ) { 1139 case vm_thread: 1140 thrtyp = (char *)"vm"; 1141 break; 1142 case cgc_thread: 1143 thrtyp = (char *)"cgc"; 1144 break; 1145 case pgc_thread: 1146 thrtyp = (char *)"pgc"; 1147 break; 1148 case java_thread: 1149 thrtyp = (char *)"java"; 1150 break; 1151 case compiler_thread: 1152 thrtyp = (char *)"compiler"; 1153 break; 1154 case watcher_thread: 1155 thrtyp = (char *)"watcher"; 1156 break; 1157 default: 1158 thrtyp = (char *)"unknown"; 1159 break; 1160 } 1161 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1162 } 1163 1164 // Calculate stack size if it's not specified by caller. 1165 if (stack_size == 0) { 1166 // The default stack size 1M (2M for LP64). 1167 stack_size = (BytesPerWord >> 2) * K * K; 1168 1169 switch (thr_type) { 1170 case os::java_thread: 1171 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1172 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1173 break; 1174 case os::compiler_thread: 1175 if (CompilerThreadStackSize > 0) { 1176 stack_size = (size_t)(CompilerThreadStackSize * K); 1177 break; 1178 } // else fall through: 1179 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1180 case os::vm_thread: 1181 case os::pgc_thread: 1182 case os::cgc_thread: 1183 case os::watcher_thread: 1184 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1185 break; 1186 } 1187 } 1188 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1189 1190 // Initial state is ALLOCATED but not INITIALIZED 1191 osthread->set_state(ALLOCATED); 1192 1193 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1194 // We got lots of threads. Check if we still have some address space left. 1195 // Need to be at least 5Mb of unreserved address space. We do check by 1196 // trying to reserve some. 1197 const size_t VirtualMemoryBangSize = 20*K*K; 1198 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1199 if (mem == NULL) { 1200 delete osthread; 1201 return false; 1202 } else { 1203 // Release the memory again 1204 os::release_memory(mem, VirtualMemoryBangSize); 1205 } 1206 } 1207 1208 // Setup osthread because the child thread may need it. 1209 thread->set_osthread(osthread); 1210 1211 // Create the Solaris thread 1212 // explicit THR_BOUND for T2_libthread case in case 1213 // that assumption is not accurate, but our alternate signal stack 1214 // handling is based on it which must have bound threads 1215 thread_t tid = 0; 1216 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED 1217 | ((UseBoundThreads || os::Solaris::T2_libthread() || 1218 (thr_type == vm_thread) || 1219 (thr_type == cgc_thread) || 1220 (thr_type == pgc_thread) || 1221 (thr_type == compiler_thread && BackgroundCompilation)) ? 1222 THR_BOUND : 0); 1223 int status; 1224 1225 // 4376845 -- libthread/kernel don't provide enough LWPs to utilize all CPUs. 1226 // 1227 // On multiprocessors systems, libthread sometimes under-provisions our 1228 // process with LWPs. On a 30-way systems, for instance, we could have 1229 // 50 user-level threads in ready state and only 2 or 3 LWPs assigned 1230 // to our process. This can result in under utilization of PEs. 1231 // I suspect the problem is related to libthread's LWP 1232 // pool management and to the kernel's SIGBLOCKING "last LWP parked" 1233 // upcall policy. 1234 // 1235 // The following code is palliative -- it attempts to ensure that our 1236 // process has sufficient LWPs to take advantage of multiple PEs. 1237 // Proper long-term cures include using user-level threads bound to LWPs 1238 // (THR_BOUND) or using LWP-based synchronization. Note that there is a 1239 // slight timing window with respect to sampling _os_thread_count, but 1240 // the race is benign. Also, we should periodically recompute 1241 // _processors_online as the min of SC_NPROCESSORS_ONLN and the 1242 // the number of PEs in our partition. You might be tempted to use 1243 // THR_NEW_LWP here, but I'd recommend against it as that could 1244 // result in undesirable growth of the libthread's LWP pool. 1245 // The fix below isn't sufficient; for instance, it doesn't take into count 1246 // LWPs parked on IO. It does, however, help certain CPU-bound benchmarks. 1247 // 1248 // Some pathologies this scheme doesn't handle: 1249 // * Threads can block, releasing the LWPs. The LWPs can age out. 1250 // When a large number of threads become ready again there aren't 1251 // enough LWPs available to service them. This can occur when the 1252 // number of ready threads oscillates. 1253 // * LWPs/Threads park on IO, thus taking the LWP out of circulation. 1254 // 1255 // Finally, we should call thr_setconcurrency() periodically to refresh 1256 // the LWP pool and thwart the LWP age-out mechanism. 1257 // The "+3" term provides a little slop -- we want to slightly overprovision. 1258 1259 if (AdjustConcurrency && os::Solaris::_os_thread_count < (_processors_online+3)) { 1260 if (!(flags & THR_BOUND)) { 1261 thr_setconcurrency (os::Solaris::_os_thread_count); // avoid starvation 1262 } 1263 } 1264 // Although this doesn't hurt, we should warn of undefined behavior 1265 // when using unbound T1 threads with schedctl(). This should never 1266 // happen, as the compiler and VM threads are always created bound 1267 DEBUG_ONLY( 1268 if ((VMThreadHintNoPreempt || CompilerThreadHintNoPreempt) && 1269 (!os::Solaris::T2_libthread() && (!(flags & THR_BOUND))) && 1270 ((thr_type == vm_thread) || (thr_type == cgc_thread) || 1271 (thr_type == pgc_thread) || (thr_type == compiler_thread && BackgroundCompilation))) { 1272 warning("schedctl behavior undefined when Compiler/VM/GC Threads are Unbound"); 1273 } 1274 ); 1275 1276 1277 // Mark that we don't have an lwp or thread id yet. 1278 // In case we attempt to set the priority before the thread starts. 1279 osthread->set_lwp_id(-1); 1280 osthread->set_thread_id(-1); 1281 1282 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1283 if (status != 0) { 1284 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1285 perror("os::create_thread"); 1286 } 1287 thread->set_osthread(NULL); 1288 // Need to clean up stuff we've allocated so far 1289 delete osthread; 1290 return false; 1291 } 1292 1293 Atomic::inc(&os::Solaris::_os_thread_count); 1294 1295 // Store info on the Solaris thread into the OSThread 1296 osthread->set_thread_id(tid); 1297 1298 // Remember that we created this thread so we can set priority on it 1299 osthread->set_vm_created(); 1300 1301 // Set the default thread priority otherwise use NormalPriority 1302 1303 if ( UseThreadPriorities ) { 1304 thr_setprio(tid, (DefaultThreadPriority == -1) ? 1305 java_to_os_priority[NormPriority] : 1306 DefaultThreadPriority); 1307 } 1308 1309 // Initial thread state is INITIALIZED, not SUSPENDED 1310 osthread->set_state(INITIALIZED); 1311 1312 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1313 return true; 1314} 1315 1316/* defined for >= Solaris 10. This allows builds on earlier versions 1317 * of Solaris to take advantage of the newly reserved Solaris JVM signals 1318 * With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1319 * and -XX:+UseAltSigs does nothing since these should have no conflict 1320 */ 1321#if !defined(SIGJVM1) 1322#define SIGJVM1 39 1323#define SIGJVM2 40 1324#endif 1325 1326debug_only(static bool signal_sets_initialized = false); 1327static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1328int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1329int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1330 1331bool os::Solaris::is_sig_ignored(int sig) { 1332 struct sigaction oact; 1333 sigaction(sig, (struct sigaction*)NULL, &oact); 1334 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1335 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1336 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) 1337 return true; 1338 else 1339 return false; 1340} 1341 1342// Note: SIGRTMIN is a macro that calls sysconf() so it will 1343// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1344static bool isJVM1available() { 1345 return SIGJVM1 < SIGRTMIN; 1346} 1347 1348void os::Solaris::signal_sets_init() { 1349 // Should also have an assertion stating we are still single-threaded. 1350 assert(!signal_sets_initialized, "Already initialized"); 1351 // Fill in signals that are necessarily unblocked for all threads in 1352 // the VM. Currently, we unblock the following signals: 1353 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1354 // by -Xrs (=ReduceSignalUsage)); 1355 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1356 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1357 // the dispositions or masks wrt these signals. 1358 // Programs embedding the VM that want to use the above signals for their 1359 // own purposes must, at this time, use the "-Xrs" option to prevent 1360 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1361 // (See bug 4345157, and other related bugs). 1362 // In reality, though, unblocking these signals is really a nop, since 1363 // these signals are not blocked by default. 1364 sigemptyset(&unblocked_sigs); 1365 sigemptyset(&allowdebug_blocked_sigs); 1366 sigaddset(&unblocked_sigs, SIGILL); 1367 sigaddset(&unblocked_sigs, SIGSEGV); 1368 sigaddset(&unblocked_sigs, SIGBUS); 1369 sigaddset(&unblocked_sigs, SIGFPE); 1370 1371 if (isJVM1available) { 1372 os::Solaris::set_SIGinterrupt(SIGJVM1); 1373 os::Solaris::set_SIGasync(SIGJVM2); 1374 } else if (UseAltSigs) { 1375 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1376 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1377 } else { 1378 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1379 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1380 } 1381 1382 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1383 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1384 1385 if (!ReduceSignalUsage) { 1386 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1387 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1388 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1389 } 1390 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1391 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1392 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1393 } 1394 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1395 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1396 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1397 } 1398 } 1399 // Fill in signals that are blocked by all but the VM thread. 1400 sigemptyset(&vm_sigs); 1401 if (!ReduceSignalUsage) 1402 sigaddset(&vm_sigs, BREAK_SIGNAL); 1403 debug_only(signal_sets_initialized = true); 1404 1405 // For diagnostics only used in run_periodic_checks 1406 sigemptyset(&check_signal_done); 1407} 1408 1409// These are signals that are unblocked while a thread is running Java. 1410// (For some reason, they get blocked by default.) 1411sigset_t* os::Solaris::unblocked_signals() { 1412 assert(signal_sets_initialized, "Not initialized"); 1413 return &unblocked_sigs; 1414} 1415 1416// These are the signals that are blocked while a (non-VM) thread is 1417// running Java. Only the VM thread handles these signals. 1418sigset_t* os::Solaris::vm_signals() { 1419 assert(signal_sets_initialized, "Not initialized"); 1420 return &vm_sigs; 1421} 1422 1423// These are signals that are blocked during cond_wait to allow debugger in 1424sigset_t* os::Solaris::allowdebug_blocked_signals() { 1425 assert(signal_sets_initialized, "Not initialized"); 1426 return &allowdebug_blocked_sigs; 1427} 1428 1429// First crack at OS-specific initialization, from inside the new thread. 1430void os::initialize_thread() { 1431 int r = thr_main() ; 1432 guarantee (r == 0 || r == 1, "CR6501650 or CR6493689") ; 1433 if (r) { 1434 JavaThread* jt = (JavaThread *)Thread::current(); 1435 assert(jt != NULL,"Sanity check"); 1436 size_t stack_size; 1437 address base = jt->stack_base(); 1438 if (Arguments::created_by_java_launcher()) { 1439 // Use 2MB to allow for Solaris 7 64 bit mode. 1440 stack_size = JavaThread::stack_size_at_create() == 0 1441 ? 2048*K : JavaThread::stack_size_at_create(); 1442 1443 // There are rare cases when we may have already used more than 1444 // the basic stack size allotment before this method is invoked. 1445 // Attempt to allow for a normally sized java_stack. 1446 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1447 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1448 } else { 1449 // 6269555: If we were not created by a Java launcher, i.e. if we are 1450 // running embedded in a native application, treat the primordial thread 1451 // as much like a native attached thread as possible. This means using 1452 // the current stack size from thr_stksegment(), unless it is too large 1453 // to reliably setup guard pages. A reasonable max size is 8MB. 1454 size_t current_size = current_stack_size(); 1455 // This should never happen, but just in case.... 1456 if (current_size == 0) current_size = 2 * K * K; 1457 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1458 } 1459 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1460 stack_size = (size_t)(base - bottom); 1461 1462 assert(stack_size > 0, "Stack size calculation problem"); 1463 1464 if (stack_size > jt->stack_size()) { 1465 NOT_PRODUCT( 1466 struct rlimit limits; 1467 getrlimit(RLIMIT_STACK, &limits); 1468 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1469 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1470 ) 1471 tty->print_cr( 1472 "Stack size of %d Kb exceeds current limit of %d Kb.\n" 1473 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1474 "See limit(1) to increase the stack size limit.", 1475 stack_size / K, jt->stack_size() / K); 1476 vm_exit(1); 1477 } 1478 assert(jt->stack_size() >= stack_size, 1479 "Attempt to map more stack than was allocated"); 1480 jt->set_stack_size(stack_size); 1481 } 1482 1483 // 5/22/01: Right now alternate signal stacks do not handle 1484 // throwing stack overflow exceptions, see bug 4463178 1485 // Until a fix is found for this, T2 will NOT imply alternate signal 1486 // stacks. 1487 // If using T2 libthread threads, install an alternate signal stack. 1488 // Because alternate stacks associate with LWPs on Solaris, 1489 // see sigaltstack(2), if using UNBOUND threads, or if UseBoundThreads 1490 // we prefer to explicitly stack bang. 1491 // If not using T2 libthread, but using UseBoundThreads any threads 1492 // (primordial thread, jni_attachCurrentThread) we do not create, 1493 // probably are not bound, therefore they can not have an alternate 1494 // signal stack. Since our stack banging code is generated and 1495 // is shared across threads, all threads must be bound to allow 1496 // using alternate signal stacks. The alternative is to interpose 1497 // on _lwp_create to associate an alt sig stack with each LWP, 1498 // and this could be a problem when the JVM is embedded. 1499 // We would prefer to use alternate signal stacks with T2 1500 // Since there is currently no accurate way to detect T2 1501 // we do not. Assuming T2 when running T1 causes sig 11s or assertions 1502 // on installing alternate signal stacks 1503 1504 1505 // 05/09/03: removed alternate signal stack support for Solaris 1506 // The alternate signal stack mechanism is no longer needed to 1507 // handle stack overflow. This is now handled by allocating 1508 // guard pages (red zone) and stackbanging. 1509 // Initially the alternate signal stack mechanism was removed because 1510 // it did not work with T1 llibthread. Alternate 1511 // signal stacks MUST have all threads bound to lwps. Applications 1512 // can create their own threads and attach them without their being 1513 // bound under T1. This is frequently the case for the primordial thread. 1514 // If we were ever to reenable this mechanism we would need to 1515 // use the dynamic check for T2 libthread. 1516 1517 os::Solaris::init_thread_fpu_state(); 1518} 1519 1520 1521 1522// Free Solaris resources related to the OSThread 1523void os::free_thread(OSThread* osthread) { 1524 assert(osthread != NULL, "os::free_thread but osthread not set"); 1525 1526 1527 // We are told to free resources of the argument thread, 1528 // but we can only really operate on the current thread. 1529 // The main thread must take the VMThread down synchronously 1530 // before the main thread exits and frees up CodeHeap 1531 guarantee((Thread::current()->osthread() == osthread 1532 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1533 if (Thread::current()->osthread() == osthread) { 1534 // Restore caller's signal mask 1535 sigset_t sigmask = osthread->caller_sigmask(); 1536 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1537 } 1538 delete osthread; 1539} 1540 1541void os::pd_start_thread(Thread* thread) { 1542 int status = thr_continue(thread->osthread()->thread_id()); 1543 assert_status(status == 0, status, "thr_continue failed"); 1544} 1545 1546 1547intx os::current_thread_id() { 1548 return (intx)thr_self(); 1549} 1550 1551static pid_t _initial_pid = 0; 1552 1553int os::current_process_id() { 1554 return (int)(_initial_pid ? _initial_pid : getpid()); 1555} 1556 1557int os::allocate_thread_local_storage() { 1558 // %%% in Win32 this allocates a memory segment pointed to by a 1559 // register. Dan Stein can implement a similar feature in 1560 // Solaris. Alternatively, the VM can do the same thing 1561 // explicitly: malloc some storage and keep the pointer in a 1562 // register (which is part of the thread's context) (or keep it 1563 // in TLS). 1564 // %%% In current versions of Solaris, thr_self and TSD can 1565 // be accessed via short sequences of displaced indirections. 1566 // The value of thr_self is available as %g7(36). 1567 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1568 // assuming that the current thread already has a value bound to k. 1569 // It may be worth experimenting with such access patterns, 1570 // and later having the parameters formally exported from a Solaris 1571 // interface. I think, however, that it will be faster to 1572 // maintain the invariant that %g2 always contains the 1573 // JavaThread in Java code, and have stubs simply 1574 // treat %g2 as a caller-save register, preserving it in a %lN. 1575 thread_key_t tk; 1576 if (thr_keycreate( &tk, NULL ) ) 1577 fatal1("os::allocate_thread_local_storage: thr_keycreate failed (%s)", strerror(errno)); 1578 return int(tk); 1579} 1580 1581void os::free_thread_local_storage(int index) { 1582 // %%% don't think we need anything here 1583 // if ( pthread_key_delete((pthread_key_t) tk) ) 1584 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1585} 1586 1587#define SMALLINT 32 // libthread allocate for tsd_common is a version specific 1588 // small number - point is NO swap space available 1589void os::thread_local_storage_at_put(int index, void* value) { 1590 // %%% this is used only in threadLocalStorage.cpp 1591 if (thr_setspecific((thread_key_t)index, value)) { 1592 if (errno == ENOMEM) { 1593 vm_exit_out_of_memory(SMALLINT, "thr_setspecific: out of swap space"); 1594 } else { 1595 fatal1("os::thread_local_storage_at_put: thr_setspecific failed (%s)", strerror(errno)); 1596 } 1597 } else { 1598 ThreadLocalStorage::set_thread_in_slot ((Thread *) value) ; 1599 } 1600} 1601 1602// This function could be called before TLS is initialized, for example, when 1603// VM receives an async signal or when VM causes a fatal error during 1604// initialization. Return NULL if thr_getspecific() fails. 1605void* os::thread_local_storage_at(int index) { 1606 // %%% this is used only in threadLocalStorage.cpp 1607 void* r = NULL; 1608 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1609} 1610 1611 1612const int NANOSECS_PER_MILLISECS = 1000000; 1613// gethrtime can move backwards if read from one cpu and then a different cpu 1614// getTimeNanos is guaranteed to not move backward on Solaris 1615// local spinloop created as faster for a CAS on an int than 1616// a CAS on a 64bit jlong. Also Atomic::cmpxchg for jlong is not 1617// supported on sparc v8 or pre supports_cx8 intel boxes. 1618// oldgetTimeNanos for systems which do not support CAS on 64bit jlong 1619// i.e. sparc v8 and pre supports_cx8 (i486) intel boxes 1620inline hrtime_t oldgetTimeNanos() { 1621 int gotlock = LOCK_INVALID; 1622 hrtime_t newtime = gethrtime(); 1623 1624 for (;;) { 1625// grab lock for max_hrtime 1626 int curlock = max_hrtime_lock; 1627 if (curlock & LOCK_BUSY) continue; 1628 if (gotlock = Atomic::cmpxchg(LOCK_BUSY, &max_hrtime_lock, LOCK_FREE) != LOCK_FREE) continue; 1629 if (newtime > max_hrtime) { 1630 max_hrtime = newtime; 1631 } else { 1632 newtime = max_hrtime; 1633 } 1634 // release lock 1635 max_hrtime_lock = LOCK_FREE; 1636 return newtime; 1637 } 1638} 1639// gethrtime can move backwards if read from one cpu and then a different cpu 1640// getTimeNanos is guaranteed to not move backward on Solaris 1641inline hrtime_t getTimeNanos() { 1642 if (VM_Version::supports_cx8()) { 1643 bool retry = false; 1644 hrtime_t newtime = gethrtime(); 1645 hrtime_t oldmaxtime = max_hrtime; 1646 hrtime_t retmaxtime = oldmaxtime; 1647 while ((newtime > retmaxtime) && (retry == false || retmaxtime != oldmaxtime)) { 1648 oldmaxtime = retmaxtime; 1649 retmaxtime = Atomic::cmpxchg(newtime, (volatile jlong *)&max_hrtime, oldmaxtime); 1650 retry = true; 1651 } 1652 return (newtime > retmaxtime) ? newtime : retmaxtime; 1653 } else { 1654 return oldgetTimeNanos(); 1655 } 1656} 1657 1658// Time since start-up in seconds to a fine granularity. 1659// Used by VMSelfDestructTimer and the MemProfiler. 1660double os::elapsedTime() { 1661 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1662} 1663 1664jlong os::elapsed_counter() { 1665 return (jlong)(getTimeNanos() - first_hrtime); 1666} 1667 1668jlong os::elapsed_frequency() { 1669 return hrtime_hz; 1670} 1671 1672// Return the real, user, and system times in seconds from an 1673// arbitrary fixed point in the past. 1674bool os::getTimesSecs(double* process_real_time, 1675 double* process_user_time, 1676 double* process_system_time) { 1677 struct tms ticks; 1678 clock_t real_ticks = times(&ticks); 1679 1680 if (real_ticks == (clock_t) (-1)) { 1681 return false; 1682 } else { 1683 double ticks_per_second = (double) clock_tics_per_sec; 1684 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1685 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1686 // For consistency return the real time from getTimeNanos() 1687 // converted to seconds. 1688 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1689 1690 return true; 1691 } 1692} 1693 1694// Used internally for comparisons only 1695// getTimeMillis guaranteed to not move backwards on Solaris 1696jlong getTimeMillis() { 1697 jlong nanotime = getTimeNanos(); 1698 return (jlong)(nanotime / NANOSECS_PER_MILLISECS); 1699} 1700 1701// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1702jlong os::javaTimeMillis() { 1703 timeval t; 1704 if (gettimeofday( &t, NULL) == -1) 1705 fatal1("os::javaTimeMillis: gettimeofday (%s)", strerror(errno)); 1706 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1707} 1708 1709jlong os::javaTimeNanos() { 1710 return (jlong)getTimeNanos(); 1711} 1712 1713void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1714 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1715 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1716 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1717 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1718} 1719 1720char * os::local_time_string(char *buf, size_t buflen) { 1721 struct tm t; 1722 time_t long_time; 1723 time(&long_time); 1724 localtime_r(&long_time, &t); 1725 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1726 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1727 t.tm_hour, t.tm_min, t.tm_sec); 1728 return buf; 1729} 1730 1731// Note: os::shutdown() might be called very early during initialization, or 1732// called from signal handler. Before adding something to os::shutdown(), make 1733// sure it is async-safe and can handle partially initialized VM. 1734void os::shutdown() { 1735 1736 // allow PerfMemory to attempt cleanup of any persistent resources 1737 perfMemory_exit(); 1738 1739 // needs to remove object in file system 1740 AttachListener::abort(); 1741 1742 // flush buffered output, finish log files 1743 ostream_abort(); 1744 1745 // Check for abort hook 1746 abort_hook_t abort_hook = Arguments::abort_hook(); 1747 if (abort_hook != NULL) { 1748 abort_hook(); 1749 } 1750} 1751 1752// Note: os::abort() might be called very early during initialization, or 1753// called from signal handler. Before adding something to os::abort(), make 1754// sure it is async-safe and can handle partially initialized VM. 1755void os::abort(bool dump_core) { 1756 os::shutdown(); 1757 if (dump_core) { 1758#ifndef PRODUCT 1759 fdStream out(defaultStream::output_fd()); 1760 out.print_raw("Current thread is "); 1761 char buf[16]; 1762 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1763 out.print_raw_cr(buf); 1764 out.print_raw_cr("Dumping core ..."); 1765#endif 1766 ::abort(); // dump core (for debugging) 1767 } 1768 1769 ::exit(1); 1770} 1771 1772// Die immediately, no exit hook, no abort hook, no cleanup. 1773void os::die() { 1774 _exit(-1); 1775} 1776 1777// unused 1778void os::set_error_file(const char *logfile) {} 1779 1780// DLL functions 1781 1782const char* os::dll_file_extension() { return ".so"; } 1783 1784const char* os::get_temp_directory() { return "/tmp/"; } 1785 1786const char* os::get_current_directory(char *buf, int buflen) { 1787 return getcwd(buf, buflen); 1788} 1789 1790// check if addr is inside libjvm[_g].so 1791bool os::address_is_in_vm(address addr) { 1792 static address libjvm_base_addr; 1793 Dl_info dlinfo; 1794 1795 if (libjvm_base_addr == NULL) { 1796 dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo); 1797 libjvm_base_addr = (address)dlinfo.dli_fbase; 1798 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1799 } 1800 1801 if (dladdr((void *)addr, &dlinfo)) { 1802 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1803 } 1804 1805 return false; 1806} 1807 1808typedef int (*dladdr1_func_type) (void *, Dl_info *, void **, int); 1809static dladdr1_func_type dladdr1_func = NULL; 1810 1811bool os::dll_address_to_function_name(address addr, char *buf, 1812 int buflen, int * offset) { 1813 Dl_info dlinfo; 1814 1815 // dladdr1_func was initialized in os::init() 1816 if (dladdr1_func){ 1817 // yes, we have dladdr1 1818 1819 // Support for dladdr1 is checked at runtime; it may be 1820 // available even if the vm is built on a machine that does 1821 // not have dladdr1 support. Make sure there is a value for 1822 // RTLD_DL_SYMENT. 1823 #ifndef RTLD_DL_SYMENT 1824 #define RTLD_DL_SYMENT 1 1825 #endif 1826 Sym * info; 1827 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1828 RTLD_DL_SYMENT)) { 1829 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1830 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1831 1832 // check if the returned symbol really covers addr 1833 return ((char *)dlinfo.dli_saddr + info->st_size > (char *)addr); 1834 } else { 1835 if (buf) buf[0] = '\0'; 1836 if (offset) *offset = -1; 1837 return false; 1838 } 1839 } else { 1840 // no, only dladdr is available 1841 if(dladdr((void *)addr, &dlinfo)) { 1842 if (buf) jio_snprintf(buf, buflen, dlinfo.dli_sname); 1843 if (offset) *offset = addr - (address)dlinfo.dli_saddr; 1844 return true; 1845 } else { 1846 if (buf) buf[0] = '\0'; 1847 if (offset) *offset = -1; 1848 return false; 1849 } 1850 } 1851} 1852 1853bool os::dll_address_to_library_name(address addr, char* buf, 1854 int buflen, int* offset) { 1855 Dl_info dlinfo; 1856 1857 if (dladdr((void*)addr, &dlinfo)){ 1858 if (buf) jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1859 if (offset) *offset = addr - (address)dlinfo.dli_fbase; 1860 return true; 1861 } else { 1862 if (buf) buf[0] = '\0'; 1863 if (offset) *offset = -1; 1864 return false; 1865 } 1866} 1867 1868// Prints the names and full paths of all opened dynamic libraries 1869// for current process 1870void os::print_dll_info(outputStream * st) { 1871 Dl_info dli; 1872 void *handle; 1873 Link_map *map; 1874 Link_map *p; 1875 1876 st->print_cr("Dynamic libraries:"); st->flush(); 1877 1878 if (!dladdr(CAST_FROM_FN_PTR(void *, os::print_dll_info), &dli)) { 1879 st->print_cr("Error: Cannot print dynamic libraries."); 1880 return; 1881 } 1882 handle = dlopen(dli.dli_fname, RTLD_LAZY); 1883 if (handle == NULL) { 1884 st->print_cr("Error: Cannot print dynamic libraries."); 1885 return; 1886 } 1887 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1888 if (map == NULL) { 1889 st->print_cr("Error: Cannot print dynamic libraries."); 1890 return; 1891 } 1892 1893 while (map->l_prev != NULL) 1894 map = map->l_prev; 1895 1896 while (map != NULL) { 1897 st->print_cr(PTR_FORMAT " \t%s", map->l_addr, map->l_name); 1898 map = map->l_next; 1899 } 1900 1901 dlclose(handle); 1902} 1903 1904 // Loads .dll/.so and 1905 // in case of error it checks if .dll/.so was built for the 1906 // same architecture as Hotspot is running on 1907 1908void * os::dll_load(const char *filename, char *ebuf, int ebuflen) 1909{ 1910 void * result= ::dlopen(filename, RTLD_LAZY); 1911 if (result != NULL) { 1912 // Successful loading 1913 return result; 1914 } 1915 1916 Elf32_Ehdr elf_head; 1917 1918 // Read system error message into ebuf 1919 // It may or may not be overwritten below 1920 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1921 ebuf[ebuflen-1]='\0'; 1922 int diag_msg_max_length=ebuflen-strlen(ebuf); 1923 char* diag_msg_buf=ebuf+strlen(ebuf); 1924 1925 if (diag_msg_max_length==0) { 1926 // No more space in ebuf for additional diagnostics message 1927 return NULL; 1928 } 1929 1930 1931 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1932 1933 if (file_descriptor < 0) { 1934 // Can't open library, report dlerror() message 1935 return NULL; 1936 } 1937 1938 bool failed_to_read_elf_head= 1939 (sizeof(elf_head)!= 1940 (::read(file_descriptor, &elf_head,sizeof(elf_head)))) ; 1941 1942 ::close(file_descriptor); 1943 if (failed_to_read_elf_head) { 1944 // file i/o error - report dlerror() msg 1945 return NULL; 1946 } 1947 1948 typedef struct { 1949 Elf32_Half code; // Actual value as defined in elf.h 1950 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1951 char elf_class; // 32 or 64 bit 1952 char endianess; // MSB or LSB 1953 char* name; // String representation 1954 } arch_t; 1955 1956 static const arch_t arch_array[]={ 1957 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1958 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1959 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1960 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1961 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1962 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1963 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1964 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1965 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"} 1966 }; 1967 1968 #if (defined IA32) 1969 static Elf32_Half running_arch_code=EM_386; 1970 #elif (defined AMD64) 1971 static Elf32_Half running_arch_code=EM_X86_64; 1972 #elif (defined IA64) 1973 static Elf32_Half running_arch_code=EM_IA_64; 1974 #elif (defined __sparc) && (defined _LP64) 1975 static Elf32_Half running_arch_code=EM_SPARCV9; 1976 #elif (defined __sparc) && (!defined _LP64) 1977 static Elf32_Half running_arch_code=EM_SPARC; 1978 #elif (defined __powerpc64__) 1979 static Elf32_Half running_arch_code=EM_PPC64; 1980 #elif (defined __powerpc__) 1981 static Elf32_Half running_arch_code=EM_PPC; 1982 #else 1983 #error Method os::dll_load requires that one of following is defined:\ 1984 IA32, AMD64, IA64, __sparc, __powerpc__ 1985 #endif 1986 1987 // Identify compatability class for VM's architecture and library's architecture 1988 // Obtain string descriptions for architectures 1989 1990 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1991 int running_arch_index=-1; 1992 1993 for (unsigned int i=0 ; i < ARRAY_SIZE(arch_array) ; i++ ) { 1994 if (running_arch_code == arch_array[i].code) { 1995 running_arch_index = i; 1996 } 1997 if (lib_arch.code == arch_array[i].code) { 1998 lib_arch.compat_class = arch_array[i].compat_class; 1999 lib_arch.name = arch_array[i].name; 2000 } 2001 } 2002 2003 assert(running_arch_index != -1, 2004 "Didn't find running architecture code (running_arch_code) in arch_array"); 2005 if (running_arch_index == -1) { 2006 // Even though running architecture detection failed 2007 // we may still continue with reporting dlerror() message 2008 return NULL; 2009 } 2010 2011 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 2012 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 2013 return NULL; 2014 } 2015 2016 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 2017 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 2018 return NULL; 2019 } 2020 2021 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 2022 if ( lib_arch.name!=NULL ) { 2023 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2024 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 2025 lib_arch.name, arch_array[running_arch_index].name); 2026 } else { 2027 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 2028 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 2029 lib_arch.code, 2030 arch_array[running_arch_index].name); 2031 } 2032 } 2033 2034 return NULL; 2035} 2036 2037 2038 2039bool _print_ascii_file(const char* filename, outputStream* st) { 2040 int fd = open(filename, O_RDONLY); 2041 if (fd == -1) { 2042 return false; 2043 } 2044 2045 char buf[32]; 2046 int bytes; 2047 while ((bytes = read(fd, buf, sizeof(buf))) > 0) { 2048 st->print_raw(buf, bytes); 2049 } 2050 2051 close(fd); 2052 2053 return true; 2054} 2055 2056void os::print_os_info(outputStream* st) { 2057 st->print("OS:"); 2058 2059 if (!_print_ascii_file("/etc/release", st)) { 2060 st->print("Solaris"); 2061 } 2062 st->cr(); 2063 2064 // kernel 2065 st->print("uname:"); 2066 struct utsname name; 2067 uname(&name); 2068 st->print(name.sysname); st->print(" "); 2069 st->print(name.release); st->print(" "); 2070 st->print(name.version); st->print(" "); 2071 st->print(name.machine); 2072 2073 // libthread 2074 if (os::Solaris::T2_libthread()) st->print(" (T2 libthread)"); 2075 else st->print(" (T1 libthread)"); 2076 st->cr(); 2077 2078 // rlimit 2079 st->print("rlimit:"); 2080 struct rlimit rlim; 2081 2082 st->print(" STACK "); 2083 getrlimit(RLIMIT_STACK, &rlim); 2084 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2085 else st->print("%uk", rlim.rlim_cur >> 10); 2086 2087 st->print(", CORE "); 2088 getrlimit(RLIMIT_CORE, &rlim); 2089 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2090 else st->print("%uk", rlim.rlim_cur >> 10); 2091 2092 st->print(", NOFILE "); 2093 getrlimit(RLIMIT_NOFILE, &rlim); 2094 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2095 else st->print("%d", rlim.rlim_cur); 2096 2097 st->print(", AS "); 2098 getrlimit(RLIMIT_AS, &rlim); 2099 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 2100 else st->print("%uk", rlim.rlim_cur >> 10); 2101 st->cr(); 2102 2103 // load average 2104 st->print("load average:"); 2105 double loadavg[3]; 2106 os::loadavg(loadavg, 3); 2107 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 2108 st->cr(); 2109} 2110 2111 2112static bool check_addr0(outputStream* st) { 2113 jboolean status = false; 2114 int fd = open("/proc/self/map",O_RDONLY); 2115 if (fd >= 0) { 2116 prmap_t p; 2117 while(read(fd, &p, sizeof(p)) > 0) { 2118 if (p.pr_vaddr == 0x0) { 2119 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 2120 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 2121 st->print("Access:"); 2122 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 2123 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 2124 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 2125 st->cr(); 2126 status = true; 2127 } 2128 close(fd); 2129 } 2130 } 2131 return status; 2132} 2133 2134void os::print_memory_info(outputStream* st) { 2135 st->print("Memory:"); 2136 st->print(" %dk page", os::vm_page_size()>>10); 2137 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2138 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2139 st->cr(); 2140 (void) check_addr0(st); 2141} 2142 2143// Taken from /usr/include/sys/machsig.h Supposed to be architecture specific 2144// but they're the same for all the solaris architectures that we support. 2145const char *ill_names[] = { "ILL0", "ILL_ILLOPC", "ILL_ILLOPN", "ILL_ILLADR", 2146 "ILL_ILLTRP", "ILL_PRVOPC", "ILL_PRVREG", 2147 "ILL_COPROC", "ILL_BADSTK" }; 2148 2149const char *fpe_names[] = { "FPE0", "FPE_INTDIV", "FPE_INTOVF", "FPE_FLTDIV", 2150 "FPE_FLTOVF", "FPE_FLTUND", "FPE_FLTRES", 2151 "FPE_FLTINV", "FPE_FLTSUB" }; 2152 2153const char *segv_names[] = { "SEGV0", "SEGV_MAPERR", "SEGV_ACCERR" }; 2154 2155const char *bus_names[] = { "BUS0", "BUS_ADRALN", "BUS_ADRERR", "BUS_OBJERR" }; 2156 2157void os::print_siginfo(outputStream* st, void* siginfo) { 2158 st->print("siginfo:"); 2159 2160 const int buflen = 100; 2161 char buf[buflen]; 2162 siginfo_t *si = (siginfo_t*)siginfo; 2163 st->print("si_signo=%s: ", os::exception_name(si->si_signo, buf, buflen)); 2164 char *err = strerror(si->si_errno); 2165 if (si->si_errno != 0 && err != NULL) { 2166 st->print("si_errno=%s", err); 2167 } else { 2168 st->print("si_errno=%d", si->si_errno); 2169 } 2170 const int c = si->si_code; 2171 assert(c > 0, "unexpected si_code"); 2172 switch (si->si_signo) { 2173 case SIGILL: 2174 st->print(", si_code=%d (%s)", c, c > 8 ? "" : ill_names[c]); 2175 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2176 break; 2177 case SIGFPE: 2178 st->print(", si_code=%d (%s)", c, c > 9 ? "" : fpe_names[c]); 2179 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2180 break; 2181 case SIGSEGV: 2182 st->print(", si_code=%d (%s)", c, c > 2 ? "" : segv_names[c]); 2183 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2184 break; 2185 case SIGBUS: 2186 st->print(", si_code=%d (%s)", c, c > 3 ? "" : bus_names[c]); 2187 st->print(", si_addr=" PTR_FORMAT, si->si_addr); 2188 break; 2189 default: 2190 st->print(", si_code=%d", si->si_code); 2191 // no si_addr 2192 } 2193 2194 if ((si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2195 UseSharedSpaces) { 2196 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2197 if (mapinfo->is_in_shared_space(si->si_addr)) { 2198 st->print("\n\nError accessing class data sharing archive." \ 2199 " Mapped file inaccessible during execution, " \ 2200 " possible disk/network problem."); 2201 } 2202 } 2203 st->cr(); 2204} 2205 2206// Moved from whole group, because we need them here for diagnostic 2207// prints. 2208#define OLDMAXSIGNUM 32 2209static int Maxsignum = 0; 2210static int *ourSigFlags = NULL; 2211 2212extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2213 2214int os::Solaris::get_our_sigflags(int sig) { 2215 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2216 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2217 return ourSigFlags[sig]; 2218} 2219 2220void os::Solaris::set_our_sigflags(int sig, int flags) { 2221 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2222 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2223 ourSigFlags[sig] = flags; 2224} 2225 2226 2227static const char* get_signal_handler_name(address handler, 2228 char* buf, int buflen) { 2229 int offset; 2230 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2231 if (found) { 2232 // skip directory names 2233 const char *p1, *p2; 2234 p1 = buf; 2235 size_t len = strlen(os::file_separator()); 2236 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2237 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2238 } else { 2239 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2240 } 2241 return buf; 2242} 2243 2244static void print_signal_handler(outputStream* st, int sig, 2245 char* buf, size_t buflen) { 2246 struct sigaction sa; 2247 2248 sigaction(sig, NULL, &sa); 2249 2250 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2251 2252 address handler = (sa.sa_flags & SA_SIGINFO) 2253 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2254 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2255 2256 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2257 st->print("SIG_DFL"); 2258 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2259 st->print("SIG_IGN"); 2260 } else { 2261 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2262 } 2263 2264 st->print(", sa_mask[0]=" PTR32_FORMAT, *(uint32_t*)&sa.sa_mask); 2265 2266 address rh = VMError::get_resetted_sighandler(sig); 2267 // May be, handler was resetted by VMError? 2268 if(rh != NULL) { 2269 handler = rh; 2270 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2271 } 2272 2273 st->print(", sa_flags=" PTR32_FORMAT, sa.sa_flags); 2274 2275 // Check: is it our handler? 2276 if(handler == CAST_FROM_FN_PTR(address, signalHandler) || 2277 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2278 // It is our signal handler 2279 // check for flags 2280 if(sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2281 st->print( 2282 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2283 os::Solaris::get_our_sigflags(sig)); 2284 } 2285 } 2286 st->cr(); 2287} 2288 2289void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2290 st->print_cr("Signal Handlers:"); 2291 print_signal_handler(st, SIGSEGV, buf, buflen); 2292 print_signal_handler(st, SIGBUS , buf, buflen); 2293 print_signal_handler(st, SIGFPE , buf, buflen); 2294 print_signal_handler(st, SIGPIPE, buf, buflen); 2295 print_signal_handler(st, SIGXFSZ, buf, buflen); 2296 print_signal_handler(st, SIGILL , buf, buflen); 2297 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2298 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2299 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2300 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2301 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2302 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2303 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2304 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2305} 2306 2307static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2308 2309// Find the full path to the current module, libjvm.so or libjvm_g.so 2310void os::jvm_path(char *buf, jint buflen) { 2311 // Error checking. 2312 if (buflen < MAXPATHLEN) { 2313 assert(false, "must use a large-enough buffer"); 2314 buf[0] = '\0'; 2315 return; 2316 } 2317 // Lazy resolve the path to current module. 2318 if (saved_jvm_path[0] != 0) { 2319 strcpy(buf, saved_jvm_path); 2320 return; 2321 } 2322 2323 Dl_info dlinfo; 2324 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2325 assert(ret != 0, "cannot locate libjvm"); 2326 realpath((char *)dlinfo.dli_fname, buf); 2327 2328 if (strcmp(Arguments::sun_java_launcher(), "gamma") == 0) { 2329 // Support for the gamma launcher. Typical value for buf is 2330 // "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". If "/jre/lib/" appears at 2331 // the right place in the string, then assume we are installed in a JDK and 2332 // we're done. Otherwise, check for a JAVA_HOME environment variable and fix 2333 // up the path so it looks like libjvm.so is installed there (append a 2334 // fake suffix hotspot/libjvm.so). 2335 const char *p = buf + strlen(buf) - 1; 2336 for (int count = 0; p > buf && count < 5; ++count) { 2337 for (--p; p > buf && *p != '/'; --p) 2338 /* empty */ ; 2339 } 2340 2341 if (strncmp(p, "/jre/lib/", 9) != 0) { 2342 // Look for JAVA_HOME in the environment. 2343 char* java_home_var = ::getenv("JAVA_HOME"); 2344 if (java_home_var != NULL && java_home_var[0] != 0) { 2345 char cpu_arch[12]; 2346 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2347#ifdef _LP64 2348 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2349 if (strcmp(cpu_arch, "sparc") == 0) { 2350 strcat(cpu_arch, "v9"); 2351 } else if (strcmp(cpu_arch, "i386") == 0) { 2352 strcpy(cpu_arch, "amd64"); 2353 } 2354#endif 2355 // Check the current module name "libjvm.so" or "libjvm_g.so". 2356 p = strrchr(buf, '/'); 2357 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2358 p = strstr(p, "_g") ? "_g" : ""; 2359 2360 realpath(java_home_var, buf); 2361 sprintf(buf + strlen(buf), "/jre/lib/%s", cpu_arch); 2362 if (0 == access(buf, F_OK)) { 2363 // Use current module name "libjvm[_g].so" instead of 2364 // "libjvm"debug_only("_g")".so" since for fastdebug version 2365 // we should have "libjvm.so" but debug_only("_g") adds "_g"! 2366 // It is used when we are choosing the HPI library's name 2367 // "libhpi[_g].so" in hpi::initialize_get_interface(). 2368 sprintf(buf + strlen(buf), "/hotspot/libjvm%s.so", p); 2369 } else { 2370 // Go back to path of .so 2371 realpath((char *)dlinfo.dli_fname, buf); 2372 } 2373 } 2374 } 2375 } 2376 2377 strcpy(saved_jvm_path, buf); 2378} 2379 2380 2381void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2382 // no prefix required, not even "_" 2383} 2384 2385 2386void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2387 // no suffix required 2388} 2389 2390 2391// sun.misc.Signal 2392 2393extern "C" { 2394 static void UserHandler(int sig, void *siginfo, void *context) { 2395 // Ctrl-C is pressed during error reporting, likely because the error 2396 // handler fails to abort. Let VM die immediately. 2397 if (sig == SIGINT && is_error_reported()) { 2398 os::die(); 2399 } 2400 2401 os::signal_notify(sig); 2402 // We do not need to reinstate the signal handler each time... 2403 } 2404} 2405 2406void* os::user_handler() { 2407 return CAST_FROM_FN_PTR(void*, UserHandler); 2408} 2409 2410extern "C" { 2411 typedef void (*sa_handler_t)(int); 2412 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2413} 2414 2415void* os::signal(int signal_number, void* handler) { 2416 struct sigaction sigAct, oldSigAct; 2417 sigfillset(&(sigAct.sa_mask)); 2418 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2419 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2420 2421 if (sigaction(signal_number, &sigAct, &oldSigAct)) 2422 // -1 means registration failed 2423 return (void *)-1; 2424 2425 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2426} 2427 2428void os::signal_raise(int signal_number) { 2429 raise(signal_number); 2430} 2431 2432/* 2433 * The following code is moved from os.cpp for making this 2434 * code platform specific, which it is by its very nature. 2435 */ 2436 2437// a counter for each possible signal value 2438static int Sigexit = 0; 2439static int Maxlibjsigsigs; 2440static jint *pending_signals = NULL; 2441static int *preinstalled_sigs = NULL; 2442static struct sigaction *chainedsigactions = NULL; 2443static sema_t sig_sem; 2444typedef int (*version_getting_t)(); 2445version_getting_t os::Solaris::get_libjsig_version = NULL; 2446static int libjsigversion = NULL; 2447 2448int os::sigexitnum_pd() { 2449 assert(Sigexit > 0, "signal memory not yet initialized"); 2450 return Sigexit; 2451} 2452 2453void os::Solaris::init_signal_mem() { 2454 // Initialize signal structures 2455 Maxsignum = SIGRTMAX; 2456 Sigexit = Maxsignum+1; 2457 assert(Maxsignum >0, "Unable to obtain max signal number"); 2458 2459 Maxlibjsigsigs = Maxsignum; 2460 2461 // pending_signals has one int per signal 2462 // The additional signal is for SIGEXIT - exit signal to signal_thread 2463 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1)); 2464 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2465 2466 if (UseSignalChaining) { 2467 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2468 * (Maxsignum + 1)); 2469 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2470 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1)); 2471 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2472 } 2473 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1 )); 2474 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2475} 2476 2477void os::signal_init_pd() { 2478 int ret; 2479 2480 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2481 assert(ret == 0, "sema_init() failed"); 2482} 2483 2484void os::signal_notify(int signal_number) { 2485 int ret; 2486 2487 Atomic::inc(&pending_signals[signal_number]); 2488 ret = ::sema_post(&sig_sem); 2489 assert(ret == 0, "sema_post() failed"); 2490} 2491 2492static int check_pending_signals(bool wait_for_signal) { 2493 int ret; 2494 while (true) { 2495 for (int i = 0; i < Sigexit + 1; i++) { 2496 jint n = pending_signals[i]; 2497 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2498 return i; 2499 } 2500 } 2501 if (!wait_for_signal) { 2502 return -1; 2503 } 2504 JavaThread *thread = JavaThread::current(); 2505 ThreadBlockInVM tbivm(thread); 2506 2507 bool threadIsSuspended; 2508 do { 2509 thread->set_suspend_equivalent(); 2510 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2511 while((ret = ::sema_wait(&sig_sem)) == EINTR) 2512 ; 2513 assert(ret == 0, "sema_wait() failed"); 2514 2515 // were we externally suspended while we were waiting? 2516 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2517 if (threadIsSuspended) { 2518 // 2519 // The semaphore has been incremented, but while we were waiting 2520 // another thread suspended us. We don't want to continue running 2521 // while suspended because that would surprise the thread that 2522 // suspended us. 2523 // 2524 ret = ::sema_post(&sig_sem); 2525 assert(ret == 0, "sema_post() failed"); 2526 2527 thread->java_suspend_self(); 2528 } 2529 } while (threadIsSuspended); 2530 } 2531} 2532 2533int os::signal_lookup() { 2534 return check_pending_signals(false); 2535} 2536 2537int os::signal_wait() { 2538 return check_pending_signals(true); 2539} 2540 2541//////////////////////////////////////////////////////////////////////////////// 2542// Virtual Memory 2543 2544static int page_size = -1; 2545 2546// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2547// clear this var if support is not available. 2548static bool has_map_align = true; 2549 2550int os::vm_page_size() { 2551 assert(page_size != -1, "must call os::init"); 2552 return page_size; 2553} 2554 2555// Solaris allocates memory by pages. 2556int os::vm_allocation_granularity() { 2557 assert(page_size != -1, "must call os::init"); 2558 return page_size; 2559} 2560 2561bool os::commit_memory(char* addr, size_t bytes) { 2562 size_t size = bytes; 2563 return 2564 NULL != Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, 2565 PROT_READ | PROT_WRITE | PROT_EXEC); 2566} 2567 2568bool os::commit_memory(char* addr, size_t bytes, size_t alignment_hint) { 2569 if (commit_memory(addr, bytes)) { 2570 if (UseMPSS && alignment_hint > (size_t)vm_page_size()) { 2571 // If the large page size has been set and the VM 2572 // is using large pages, use the large page size 2573 // if it is smaller than the alignment hint. This is 2574 // a case where the VM wants to use a larger alignment size 2575 // for its own reasons but still want to use large pages 2576 // (which is what matters to setting the mpss range. 2577 size_t page_size = 0; 2578 if (large_page_size() < alignment_hint) { 2579 assert(UseLargePages, "Expected to be here for large page use only"); 2580 page_size = large_page_size(); 2581 } else { 2582 // If the alignment hint is less than the large page 2583 // size, the VM wants a particular alignment (thus the hint) 2584 // for internal reasons. Try to set the mpss range using 2585 // the alignment_hint. 2586 page_size = alignment_hint; 2587 } 2588 // Since this is a hint, ignore any failures. 2589 (void)Solaris::set_mpss_range(addr, bytes, page_size); 2590 } 2591 return true; 2592 } 2593 return false; 2594} 2595 2596// Uncommit the pages in a specified region. 2597void os::free_memory(char* addr, size_t bytes) { 2598 if (madvise(addr, bytes, MADV_FREE) < 0) { 2599 debug_only(warning("MADV_FREE failed.")); 2600 return; 2601 } 2602} 2603 2604// Change the page size in a given range. 2605void os::realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2606 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2607 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2608 Solaris::set_mpss_range(addr, bytes, alignment_hint); 2609} 2610 2611// Tell the OS to make the range local to the first-touching LWP 2612void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2613 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2614 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2615 debug_only(warning("MADV_ACCESS_LWP failed.")); 2616 } 2617} 2618 2619// Tell the OS that this range would be accessed from different LWPs. 2620void os::numa_make_global(char *addr, size_t bytes) { 2621 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2622 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2623 debug_only(warning("MADV_ACCESS_MANY failed.")); 2624 } 2625} 2626 2627// Get the number of the locality groups. 2628size_t os::numa_get_groups_num() { 2629 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2630 return n != -1 ? n : 1; 2631} 2632 2633// Get a list of leaf locality groups. A leaf lgroup is group that 2634// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2635// board. An LWP is assigned to one of these groups upon creation. 2636size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2637 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2638 ids[0] = 0; 2639 return 1; 2640 } 2641 int result_size = 0, top = 1, bottom = 0, cur = 0; 2642 for (int k = 0; k < size; k++) { 2643 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2644 (Solaris::lgrp_id_t*)&ids[top], size - top); 2645 if (r == -1) { 2646 ids[0] = 0; 2647 return 1; 2648 } 2649 if (!r) { 2650 // That's a leaf node. 2651 assert (bottom <= cur, "Sanity check"); 2652 // Check if the node has memory 2653 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2654 NULL, 0, LGRP_RSRC_MEM) > 0) { 2655 ids[bottom++] = ids[cur]; 2656 } 2657 } 2658 top += r; 2659 cur++; 2660 } 2661 return bottom; 2662} 2663 2664// Detect the topology change. Typically happens during CPU pluggin-unplugging. 2665bool os::numa_topology_changed() { 2666 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2667 if (is_stale != -1 && is_stale) { 2668 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2669 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2670 assert(c != 0, "Failure to initialize LGRP API"); 2671 Solaris::set_lgrp_cookie(c); 2672 return true; 2673 } 2674 return false; 2675} 2676 2677// Get the group id of the current LWP. 2678int os::numa_get_group_id() { 2679 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2680 if (lgrp_id == -1) { 2681 return 0; 2682 } 2683 const int size = os::numa_get_groups_num(); 2684 int *ids = (int*)alloca(size * sizeof(int)); 2685 2686 // Get the ids of all lgroups with memory; r is the count. 2687 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2688 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2689 if (r <= 0) { 2690 return 0; 2691 } 2692 return ids[os::random() % r]; 2693} 2694 2695// Request information about the page. 2696bool os::get_page_info(char *start, page_info* info) { 2697 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2698 uint64_t addr = (uintptr_t)start; 2699 uint64_t outdata[2]; 2700 uint_t validity = 0; 2701 2702 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2703 return false; 2704 } 2705 2706 info->size = 0; 2707 info->lgrp_id = -1; 2708 2709 if ((validity & 1) != 0) { 2710 if ((validity & 2) != 0) { 2711 info->lgrp_id = outdata[0]; 2712 } 2713 if ((validity & 4) != 0) { 2714 info->size = outdata[1]; 2715 } 2716 return true; 2717 } 2718 return false; 2719} 2720 2721// Scan the pages from start to end until a page different than 2722// the one described in the info parameter is encountered. 2723char *os::scan_pages(char *start, char* end, page_info* page_expected, page_info* page_found) { 2724 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2725 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2726 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT]; 2727 uint_t validity[MAX_MEMINFO_CNT]; 2728 2729 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2730 uint64_t p = (uint64_t)start; 2731 while (p < (uint64_t)end) { 2732 addrs[0] = p; 2733 size_t addrs_count = 1; 2734 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] < (uint64_t)end) { 2735 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2736 addrs_count++; 2737 } 2738 2739 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2740 return NULL; 2741 } 2742 2743 size_t i = 0; 2744 for (; i < addrs_count; i++) { 2745 if ((validity[i] & 1) != 0) { 2746 if ((validity[i] & 4) != 0) { 2747 if (outdata[types * i + 1] != page_expected->size) { 2748 break; 2749 } 2750 } else 2751 if (page_expected->size != 0) { 2752 break; 2753 } 2754 2755 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2756 if (outdata[types * i] != page_expected->lgrp_id) { 2757 break; 2758 } 2759 } 2760 } else { 2761 return NULL; 2762 } 2763 } 2764 2765 if (i != addrs_count) { 2766 if ((validity[i] & 2) != 0) { 2767 page_found->lgrp_id = outdata[types * i]; 2768 } else { 2769 page_found->lgrp_id = -1; 2770 } 2771 if ((validity[i] & 4) != 0) { 2772 page_found->size = outdata[types * i + 1]; 2773 } else { 2774 page_found->size = 0; 2775 } 2776 return (char*)addrs[i]; 2777 } 2778 2779 p = addrs[addrs_count - 1] + page_size; 2780 } 2781 return end; 2782} 2783 2784bool os::uncommit_memory(char* addr, size_t bytes) { 2785 size_t size = bytes; 2786 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2787 // uncommitted page. Otherwise, the read/write might succeed if we 2788 // have enough swap space to back the physical page. 2789 return 2790 NULL != Solaris::mmap_chunk(addr, size, 2791 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2792 PROT_NONE); 2793} 2794 2795char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2796 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2797 2798 if (b == MAP_FAILED) { 2799 return NULL; 2800 } 2801 return b; 2802} 2803 2804char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, size_t alignment_hint, bool fixed) { 2805 char* addr = requested_addr; 2806 int flags = MAP_PRIVATE | MAP_NORESERVE; 2807 2808 assert(!(fixed && (alignment_hint > 0)), "alignment hint meaningless with fixed mmap"); 2809 2810 if (fixed) { 2811 flags |= MAP_FIXED; 2812 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2813 flags |= MAP_ALIGN; 2814 addr = (char*) alignment_hint; 2815 } 2816 2817 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2818 // uncommitted page. Otherwise, the read/write might succeed if we 2819 // have enough swap space to back the physical page. 2820 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2821} 2822 2823char* os::reserve_memory(size_t bytes, char* requested_addr, size_t alignment_hint) { 2824 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, (requested_addr != NULL)); 2825 2826 guarantee(requested_addr == NULL || requested_addr == addr, 2827 "OS failed to return requested mmap address."); 2828 return addr; 2829} 2830 2831// Reserve memory at an arbitrary address, only if that area is 2832// available (and not reserved for something else). 2833 2834char* os::attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2835 const int max_tries = 10; 2836 char* base[max_tries]; 2837 size_t size[max_tries]; 2838 2839 // Solaris adds a gap between mmap'ed regions. The size of the gap 2840 // is dependent on the requested size and the MMU. Our initial gap 2841 // value here is just a guess and will be corrected later. 2842 bool had_top_overlap = false; 2843 bool have_adjusted_gap = false; 2844 size_t gap = 0x400000; 2845 2846 // Assert only that the size is a multiple of the page size, since 2847 // that's all that mmap requires, and since that's all we really know 2848 // about at this low abstraction level. If we need higher alignment, 2849 // we can either pass an alignment to this method or verify alignment 2850 // in one of the methods further up the call chain. See bug 5044738. 2851 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2852 2853 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2854 // Give it a try, if the kernel honors the hint we can return immediately. 2855 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2856 volatile int err = errno; 2857 if (addr == requested_addr) { 2858 return addr; 2859 } else if (addr != NULL) { 2860 unmap_memory(addr, bytes); 2861 } 2862 2863 if (PrintMiscellaneous && Verbose) { 2864 char buf[256]; 2865 buf[0] = '\0'; 2866 if (addr == NULL) { 2867 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2868 } 2869 warning("attempt_reserve_memory_at: couldn't reserve %d bytes at " 2870 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2871 "%s", bytes, requested_addr, addr, buf); 2872 } 2873 2874 // Address hint method didn't work. Fall back to the old method. 2875 // In theory, once SNV becomes our oldest supported platform, this 2876 // code will no longer be needed. 2877 // 2878 // Repeatedly allocate blocks until the block is allocated at the 2879 // right spot. Give up after max_tries. 2880 int i; 2881 for (i = 0; i < max_tries; ++i) { 2882 base[i] = reserve_memory(bytes); 2883 2884 if (base[i] != NULL) { 2885 // Is this the block we wanted? 2886 if (base[i] == requested_addr) { 2887 size[i] = bytes; 2888 break; 2889 } 2890 2891 // check that the gap value is right 2892 if (had_top_overlap && !have_adjusted_gap) { 2893 size_t actual_gap = base[i-1] - base[i] - bytes; 2894 if (gap != actual_gap) { 2895 // adjust the gap value and retry the last 2 allocations 2896 assert(i > 0, "gap adjustment code problem"); 2897 have_adjusted_gap = true; // adjust the gap only once, just in case 2898 gap = actual_gap; 2899 if (PrintMiscellaneous && Verbose) { 2900 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2901 } 2902 unmap_memory(base[i], bytes); 2903 unmap_memory(base[i-1], size[i-1]); 2904 i-=2; 2905 continue; 2906 } 2907 } 2908 2909 // Does this overlap the block we wanted? Give back the overlapped 2910 // parts and try again. 2911 // 2912 // There is still a bug in this code: if top_overlap == bytes, 2913 // the overlap is offset from requested region by the value of gap. 2914 // In this case giving back the overlapped part will not work, 2915 // because we'll give back the entire block at base[i] and 2916 // therefore the subsequent allocation will not generate a new gap. 2917 // This could be fixed with a new algorithm that used larger 2918 // or variable size chunks to find the requested region - 2919 // but such a change would introduce additional complications. 2920 // It's rare enough that the planets align for this bug, 2921 // so we'll just wait for a fix for 6204603/5003415 which 2922 // will provide a mmap flag to allow us to avoid this business. 2923 2924 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2925 if (top_overlap >= 0 && top_overlap < bytes) { 2926 had_top_overlap = true; 2927 unmap_memory(base[i], top_overlap); 2928 base[i] += top_overlap; 2929 size[i] = bytes - top_overlap; 2930 } else { 2931 size_t bottom_overlap = base[i] + bytes - requested_addr; 2932 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2933 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2934 warning("attempt_reserve_memory_at: possible alignment bug"); 2935 } 2936 unmap_memory(requested_addr, bottom_overlap); 2937 size[i] = bytes - bottom_overlap; 2938 } else { 2939 size[i] = bytes; 2940 } 2941 } 2942 } 2943 } 2944 2945 // Give back the unused reserved pieces. 2946 2947 for (int j = 0; j < i; ++j) { 2948 if (base[j] != NULL) { 2949 unmap_memory(base[j], size[j]); 2950 } 2951 } 2952 2953 return (i < max_tries) ? requested_addr : NULL; 2954} 2955 2956bool os::release_memory(char* addr, size_t bytes) { 2957 size_t size = bytes; 2958 return munmap(addr, size) == 0; 2959} 2960 2961static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2962 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2963 "addr must be page aligned"); 2964 int retVal = mprotect(addr, bytes, prot); 2965 return retVal == 0; 2966} 2967 2968// Protect memory (make it read-only. (Used to pass readonly pages through 2969// JNI GetArray<type>Elements with empty arrays.) 2970bool os::protect_memory(char* addr, size_t bytes) { 2971 return solaris_mprotect(addr, bytes, PROT_READ); 2972} 2973 2974// guard_memory and unguard_memory only happens within stack guard pages. 2975// Since ISM pertains only to the heap, guard and unguard memory should not 2976/// happen with an ISM region. 2977bool os::guard_memory(char* addr, size_t bytes) { 2978 return solaris_mprotect(addr, bytes, PROT_NONE); 2979} 2980 2981bool os::unguard_memory(char* addr, size_t bytes) { 2982 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE|PROT_EXEC); 2983} 2984 2985// Large page support 2986 2987// UseLargePages is the master flag to enable/disable large page memory. 2988// UseMPSS and UseISM are supported for compatibility reasons. Their combined 2989// effects can be described in the following table: 2990// 2991// UseLargePages UseMPSS UseISM 2992// false * * => UseLargePages is the master switch, turning 2993// it off will turn off both UseMPSS and 2994// UseISM. VM will not use large page memory 2995// regardless the settings of UseMPSS/UseISM. 2996// true false false => Unless future Solaris provides other 2997// mechanism to use large page memory, this 2998// combination is equivalent to -UseLargePages, 2999// VM will not use large page memory 3000// true true false => JVM will use MPSS for large page memory. 3001// This is the default behavior. 3002// true false true => JVM will use ISM for large page memory. 3003// true true true => JVM will use ISM if it is available. 3004// Otherwise, JVM will fall back to MPSS. 3005// Becaues ISM is now available on all 3006// supported Solaris versions, this combination 3007// is equivalent to +UseISM -UseMPSS. 3008 3009typedef int (*getpagesizes_func_type) (size_t[], int); 3010static size_t _large_page_size = 0; 3011 3012bool os::Solaris::ism_sanity_check(bool warn, size_t * page_size) { 3013 // x86 uses either 2M or 4M page, depending on whether PAE (Physical Address 3014 // Extensions) mode is enabled. AMD64/EM64T uses 2M page in 64bit mode. Sparc 3015 // can support multiple page sizes. 3016 3017 // Don't bother to probe page size because getpagesizes() comes with MPSS. 3018 // ISM is only recommended on old Solaris where there is no MPSS support. 3019 // Simply choose a conservative value as default. 3020 *page_size = LargePageSizeInBytes ? LargePageSizeInBytes : 3021 SPARC_ONLY(4 * M) IA32_ONLY(4 * M) AMD64_ONLY(2 * M); 3022 3023 // ISM is available on all supported Solaris versions 3024 return true; 3025} 3026 3027// Insertion sort for small arrays (descending order). 3028static void insertion_sort_descending(size_t* array, int len) { 3029 for (int i = 0; i < len; i++) { 3030 size_t val = array[i]; 3031 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3032 size_t tmp = array[key]; 3033 array[key] = array[key - 1]; 3034 array[key - 1] = tmp; 3035 } 3036 } 3037} 3038 3039bool os::Solaris::mpss_sanity_check(bool warn, size_t * page_size) { 3040 getpagesizes_func_type getpagesizes_func = 3041 CAST_TO_FN_PTR(getpagesizes_func_type, dlsym(RTLD_DEFAULT, "getpagesizes")); 3042 if (getpagesizes_func == NULL) { 3043 if (warn) { 3044 warning("MPSS is not supported by the operating system."); 3045 } 3046 return false; 3047 } 3048 3049 const unsigned int usable_count = VM_Version::page_size_count(); 3050 if (usable_count == 1) { 3051 return false; 3052 } 3053 3054 // Fill the array of page sizes. 3055 int n = getpagesizes_func(_page_sizes, page_sizes_max); 3056 assert(n > 0, "Solaris bug?"); 3057 if (n == page_sizes_max) { 3058 // Add a sentinel value (necessary only if the array was completely filled 3059 // since it is static (zeroed at initialization)). 3060 _page_sizes[--n] = 0; 3061 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3062 } 3063 assert(_page_sizes[n] == 0, "missing sentinel"); 3064 3065 if (n == 1) return false; // Only one page size available. 3066 3067 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3068 // select up to usable_count elements. First sort the array, find the first 3069 // acceptable value, then copy the usable sizes to the top of the array and 3070 // trim the rest. Make sure to include the default page size :-). 3071 // 3072 // A better policy could get rid of the 4M limit by taking the sizes of the 3073 // important VM memory regions (java heap and possibly the code cache) into 3074 // account. 3075 insertion_sort_descending(_page_sizes, n); 3076 const size_t size_limit = 3077 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3078 int beg; 3079 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */ ; 3080 const int end = MIN2((int)usable_count, n) - 1; 3081 for (int cur = 0; cur < end; ++cur, ++beg) { 3082 _page_sizes[cur] = _page_sizes[beg]; 3083 } 3084 _page_sizes[end] = vm_page_size(); 3085 _page_sizes[end + 1] = 0; 3086 3087 if (_page_sizes[end] > _page_sizes[end - 1]) { 3088 // Default page size is not the smallest; sort again. 3089 insertion_sort_descending(_page_sizes, end + 1); 3090 } 3091 *page_size = _page_sizes[0]; 3092 3093 return true; 3094} 3095 3096bool os::large_page_init() { 3097 if (!UseLargePages) { 3098 UseISM = false; 3099 UseMPSS = false; 3100 return false; 3101 } 3102 3103 // print a warning if any large page related flag is specified on command line 3104 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3105 !FLAG_IS_DEFAULT(UseISM) || 3106 !FLAG_IS_DEFAULT(UseMPSS) || 3107 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3108 UseISM = UseISM && 3109 Solaris::ism_sanity_check(warn_on_failure, &_large_page_size); 3110 if (UseISM) { 3111 // ISM disables MPSS to be compatible with old JDK behavior 3112 UseMPSS = false; 3113 _page_sizes[0] = _large_page_size; 3114 _page_sizes[1] = vm_page_size(); 3115 } 3116 3117 UseMPSS = UseMPSS && 3118 Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3119 3120 UseLargePages = UseISM || UseMPSS; 3121 return UseLargePages; 3122} 3123 3124bool os::Solaris::set_mpss_range(caddr_t start, size_t bytes, size_t align) { 3125 // Signal to OS that we want large pages for addresses 3126 // from addr, addr + bytes 3127 struct memcntl_mha mpss_struct; 3128 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3129 mpss_struct.mha_pagesize = align; 3130 mpss_struct.mha_flags = 0; 3131 if (memcntl(start, bytes, MC_HAT_ADVISE, 3132 (caddr_t) &mpss_struct, 0, 0) < 0) { 3133 debug_only(warning("Attempt to use MPSS failed.")); 3134 return false; 3135 } 3136 return true; 3137} 3138 3139char* os::reserve_memory_special(size_t bytes) { 3140 assert(UseLargePages && UseISM, "only for ISM large pages"); 3141 3142 size_t size = bytes; 3143 char* retAddr = NULL; 3144 int shmid; 3145 key_t ismKey; 3146 3147 bool warn_on_failure = UseISM && 3148 (!FLAG_IS_DEFAULT(UseLargePages) || 3149 !FLAG_IS_DEFAULT(UseISM) || 3150 !FLAG_IS_DEFAULT(LargePageSizeInBytes) 3151 ); 3152 char msg[128]; 3153 3154 ismKey = IPC_PRIVATE; 3155 3156 // Create a large shared memory region to attach to based on size. 3157 // Currently, size is the total size of the heap 3158 shmid = shmget(ismKey, size, SHM_R | SHM_W | IPC_CREAT); 3159 if (shmid == -1){ 3160 if (warn_on_failure) { 3161 jio_snprintf(msg, sizeof(msg), "Failed to reserve shared memory (errno = %d).", errno); 3162 warning(msg); 3163 } 3164 return NULL; 3165 } 3166 3167 // Attach to the region 3168 retAddr = (char *) shmat(shmid, 0, SHM_SHARE_MMU | SHM_R | SHM_W); 3169 int err = errno; 3170 3171 // Remove shmid. If shmat() is successful, the actual shared memory segment 3172 // will be deleted when it's detached by shmdt() or when the process 3173 // terminates. If shmat() is not successful this will remove the shared 3174 // segment immediately. 3175 shmctl(shmid, IPC_RMID, NULL); 3176 3177 if (retAddr == (char *) -1) { 3178 if (warn_on_failure) { 3179 jio_snprintf(msg, sizeof(msg), "Failed to attach shared memory (errno = %d).", err); 3180 warning(msg); 3181 } 3182 return NULL; 3183 } 3184 3185 return retAddr; 3186} 3187 3188bool os::release_memory_special(char* base, size_t bytes) { 3189 // detaching the SHM segment will also delete it, see reserve_memory_special() 3190 int rslt = shmdt(base); 3191 return rslt == 0; 3192} 3193 3194size_t os::large_page_size() { 3195 return _large_page_size; 3196} 3197 3198// MPSS allows application to commit large page memory on demand; with ISM 3199// the entire memory region must be allocated as shared memory. 3200bool os::can_commit_large_page_memory() { 3201 return UseISM ? false : true; 3202} 3203 3204bool os::can_execute_large_page_memory() { 3205 return UseISM ? false : true; 3206} 3207 3208static int os_sleep(jlong millis, bool interruptible) { 3209 const jlong limit = INT_MAX; 3210 jlong prevtime; 3211 int res; 3212 3213 while (millis > limit) { 3214 if ((res = os_sleep(limit, interruptible)) != OS_OK) 3215 return res; 3216 millis -= limit; 3217 } 3218 3219 // Restart interrupted polls with new parameters until the proper delay 3220 // has been completed. 3221 3222 prevtime = getTimeMillis(); 3223 3224 while (millis > 0) { 3225 jlong newtime; 3226 3227 if (!interruptible) { 3228 // Following assert fails for os::yield_all: 3229 // assert(!thread->is_Java_thread(), "must not be java thread"); 3230 res = poll(NULL, 0, millis); 3231 } else { 3232 JavaThread *jt = JavaThread::current(); 3233 3234 INTERRUPTIBLE_NORESTART_VM_ALWAYS(poll(NULL, 0, millis), res, jt, 3235 os::Solaris::clear_interrupted); 3236 } 3237 3238 // INTERRUPTIBLE_NORESTART_VM_ALWAYS returns res == OS_INTRPT for 3239 // thread.Interrupt. 3240 3241 if((res == OS_ERR) && (errno == EINTR)) { 3242 newtime = getTimeMillis(); 3243 assert(newtime >= prevtime, "time moving backwards"); 3244 /* Doing prevtime and newtime in microseconds doesn't help precision, 3245 and trying to round up to avoid lost milliseconds can result in a 3246 too-short delay. */ 3247 millis -= newtime - prevtime; 3248 if(millis <= 0) 3249 return OS_OK; 3250 prevtime = newtime; 3251 } else 3252 return res; 3253 } 3254 3255 return OS_OK; 3256} 3257 3258// Read calls from inside the vm need to perform state transitions 3259size_t os::read(int fd, void *buf, unsigned int nBytes) { 3260 INTERRUPTIBLE_RETURN_INT_VM(::read(fd, buf, nBytes), os::Solaris::clear_interrupted); 3261} 3262 3263int os::sleep(Thread* thread, jlong millis, bool interruptible) { 3264 assert(thread == Thread::current(), "thread consistency check"); 3265 3266 // TODO-FIXME: this should be removed. 3267 // On Solaris machines (especially 2.5.1) we found that sometimes the VM gets into a live lock 3268 // situation with a JavaThread being starved out of a lwp. The kernel doesn't seem to generate 3269 // a SIGWAITING signal which would enable the threads library to create a new lwp for the starving 3270 // thread. We suspect that because the Watcher thread keeps waking up at periodic intervals the kernel 3271 // is fooled into believing that the system is making progress. In the code below we block the 3272 // the watcher thread while safepoint is in progress so that it would not appear as though the 3273 // system is making progress. 3274 if (!Solaris::T2_libthread() && 3275 thread->is_Watcher_thread() && SafepointSynchronize::is_synchronizing() && !Arguments::has_profile()) { 3276 // We now try to acquire the threads lock. Since this lock is held by the VM thread during 3277 // the entire safepoint, the watcher thread will line up here during the safepoint. 3278 Threads_lock->lock_without_safepoint_check(); 3279 Threads_lock->unlock(); 3280 } 3281 3282 if (thread->is_Java_thread()) { 3283 // This is a JavaThread so we honor the _thread_blocked protocol 3284 // even for sleeps of 0 milliseconds. This was originally done 3285 // as a workaround for bug 4338139. However, now we also do it 3286 // to honor the suspend-equivalent protocol. 3287 3288 JavaThread *jt = (JavaThread *) thread; 3289 ThreadBlockInVM tbivm(jt); 3290 3291 jt->set_suspend_equivalent(); 3292 // cleared by handle_special_suspend_equivalent_condition() or 3293 // java_suspend_self() via check_and_wait_while_suspended() 3294 3295 int ret_code; 3296 if (millis <= 0) { 3297 thr_yield(); 3298 ret_code = 0; 3299 } else { 3300 // The original sleep() implementation did not create an 3301 // OSThreadWaitState helper for sleeps of 0 milliseconds. 3302 // I'm preserving that decision for now. 3303 OSThreadWaitState osts(jt->osthread(), false /* not Object.wait() */); 3304 3305 ret_code = os_sleep(millis, interruptible); 3306 } 3307 3308 // were we externally suspended while we were waiting? 3309 jt->check_and_wait_while_suspended(); 3310 3311 return ret_code; 3312 } 3313 3314 // non-JavaThread from this point on: 3315 3316 if (millis <= 0) { 3317 thr_yield(); 3318 return 0; 3319 } 3320 3321 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 3322 3323 return os_sleep(millis, interruptible); 3324} 3325 3326int os::naked_sleep() { 3327 // %% make the sleep time an integer flag. for now use 1 millisec. 3328 return os_sleep(1, false); 3329} 3330 3331// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3332void os::infinite_sleep() { 3333 while (true) { // sleep forever ... 3334 ::sleep(100); // ... 100 seconds at a time 3335 } 3336} 3337 3338// Used to convert frequent JVM_Yield() to nops 3339bool os::dont_yield() { 3340 if (DontYieldALot) { 3341 static hrtime_t last_time = 0; 3342 hrtime_t diff = getTimeNanos() - last_time; 3343 3344 if (diff < DontYieldALotInterval * 1000000) 3345 return true; 3346 3347 last_time += diff; 3348 3349 return false; 3350 } 3351 else { 3352 return false; 3353 } 3354} 3355 3356// Caveat: Solaris os::yield() causes a thread-state transition whereas 3357// the linux and win32 implementations do not. This should be checked. 3358 3359void os::yield() { 3360 // Yields to all threads with same or greater priority 3361 os::sleep(Thread::current(), 0, false); 3362} 3363 3364// Note that yield semantics are defined by the scheduling class to which 3365// the thread currently belongs. Typically, yield will _not yield to 3366// other equal or higher priority threads that reside on the dispatch queues 3367// of other CPUs. 3368 3369os::YieldResult os::NakedYield() { thr_yield(); return os::YIELD_UNKNOWN; } 3370 3371 3372// On Solaris we found that yield_all doesn't always yield to all other threads. 3373// There have been cases where there is a thread ready to execute but it doesn't 3374// get an lwp as the VM thread continues to spin with sleeps of 1 millisecond. 3375// The 1 millisecond wait doesn't seem long enough for the kernel to issue a 3376// SIGWAITING signal which will cause a new lwp to be created. So we count the 3377// number of times yield_all is called in the one loop and increase the sleep 3378// time after 8 attempts. If this fails too we increase the concurrency level 3379// so that the starving thread would get an lwp 3380 3381void os::yield_all(int attempts) { 3382 // Yields to all threads, including threads with lower priorities 3383 if (attempts == 0) { 3384 os::sleep(Thread::current(), 1, false); 3385 } else { 3386 int iterations = attempts % 30; 3387 if (iterations == 0 && !os::Solaris::T2_libthread()) { 3388 // thr_setconcurrency and _getconcurrency make sense only under T1. 3389 int noofLWPS = thr_getconcurrency(); 3390 if (noofLWPS < (Threads::number_of_threads() + 2)) { 3391 thr_setconcurrency(thr_getconcurrency() + 1); 3392 } 3393 } else if (iterations < 25) { 3394 os::sleep(Thread::current(), 1, false); 3395 } else { 3396 os::sleep(Thread::current(), 10, false); 3397 } 3398 } 3399} 3400 3401// Called from the tight loops to possibly influence time-sharing heuristics 3402void os::loop_breaker(int attempts) { 3403 os::yield_all(attempts); 3404} 3405 3406 3407// Interface for setting lwp priorities. If we are using T2 libthread, 3408// which forces the use of BoundThreads or we manually set UseBoundThreads, 3409// all of our threads will be assigned to real lwp's. Using the thr_setprio 3410// function is meaningless in this mode so we must adjust the real lwp's priority 3411// The routines below implement the getting and setting of lwp priorities. 3412// 3413// Note: There are three priority scales used on Solaris. Java priotities 3414// which range from 1 to 10, libthread "thr_setprio" scale which range 3415// from 0 to 127, and the current scheduling class of the process we 3416// are running in. This is typically from -60 to +60. 3417// The setting of the lwp priorities in done after a call to thr_setprio 3418// so Java priorities are mapped to libthread priorities and we map from 3419// the latter to lwp priorities. We don't keep priorities stored in 3420// Java priorities since some of our worker threads want to set priorities 3421// higher than all Java threads. 3422// 3423// For related information: 3424// (1) man -s 2 priocntl 3425// (2) man -s 4 priocntl 3426// (3) man dispadmin 3427// = librt.so 3428// = libthread/common/rtsched.c - thrp_setlwpprio(). 3429// = ps -cL <pid> ... to validate priority. 3430// = sched_get_priority_min and _max 3431// pthread_create 3432// sched_setparam 3433// pthread_setschedparam 3434// 3435// Assumptions: 3436// + We assume that all threads in the process belong to the same 3437// scheduling class. IE. an homogenous process. 3438// + Must be root or in IA group to change change "interactive" attribute. 3439// Priocntl() will fail silently. The only indication of failure is when 3440// we read-back the value and notice that it hasn't changed. 3441// + Interactive threads enter the runq at the head, non-interactive at the tail. 3442// + For RT, change timeslice as well. Invariant: 3443// constant "priority integral" 3444// Konst == TimeSlice * (60-Priority) 3445// Given a priority, compute appropriate timeslice. 3446// + Higher numerical values have higher priority. 3447 3448// sched class attributes 3449typedef struct { 3450 int schedPolicy; // classID 3451 int maxPrio; 3452 int minPrio; 3453} SchedInfo; 3454 3455 3456static SchedInfo tsLimits, iaLimits, rtLimits; 3457 3458#ifdef ASSERT 3459static int ReadBackValidate = 1; 3460#endif 3461static int myClass = 0; 3462static int myMin = 0; 3463static int myMax = 0; 3464static int myCur = 0; 3465static bool priocntl_enable = false; 3466 3467 3468// Call the version of priocntl suitable for all supported versions 3469// of Solaris. We need to call through this wrapper so that we can 3470// build on Solaris 9 and run on Solaris 8, 9 and 10. 3471// 3472// This code should be removed if we ever stop supporting Solaris 8 3473// and earlier releases. 3474 3475static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3476typedef long (*priocntl_type)(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg); 3477static priocntl_type priocntl_ptr = priocntl_stub; 3478 3479// Stub to set the value of the real pointer, and then call the real 3480// function. 3481 3482static long priocntl_stub(int pcver, idtype_t idtype, id_t id, int cmd, caddr_t arg) { 3483 // Try Solaris 8- name only. 3484 priocntl_type tmp = (priocntl_type)dlsym(RTLD_DEFAULT, "__priocntl"); 3485 guarantee(tmp != NULL, "priocntl function not found."); 3486 priocntl_ptr = tmp; 3487 return (*priocntl_ptr)(PC_VERSION, idtype, id, cmd, arg); 3488} 3489 3490 3491// lwp_priocntl_init 3492// 3493// Try to determine the priority scale for our process. 3494// 3495// Return errno or 0 if OK. 3496// 3497static 3498int lwp_priocntl_init () 3499{ 3500 int rslt; 3501 pcinfo_t ClassInfo; 3502 pcparms_t ParmInfo; 3503 int i; 3504 3505 if (!UseThreadPriorities) return 0; 3506 3507 // We are using Bound threads, we need to determine our priority ranges 3508 if (os::Solaris::T2_libthread() || UseBoundThreads) { 3509 // If ThreadPriorityPolicy is 1, switch tables 3510 if (ThreadPriorityPolicy == 1) { 3511 for (i = 0 ; i < MaxPriority+1; i++) 3512 os::java_to_os_priority[i] = prio_policy1[i]; 3513 } 3514 } 3515 // Not using Bound Threads, set to ThreadPolicy 1 3516 else { 3517 for ( i = 0 ; i < MaxPriority+1; i++ ) { 3518 os::java_to_os_priority[i] = prio_policy1[i]; 3519 } 3520 return 0; 3521 } 3522 3523 3524 // Get IDs for a set of well-known scheduling classes. 3525 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3526 // the system. We should have a loop that iterates over the 3527 // classID values, which are known to be "small" integers. 3528 3529 strcpy(ClassInfo.pc_clname, "TS"); 3530 ClassInfo.pc_cid = -1; 3531 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3532 if (rslt < 0) return errno; 3533 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3534 tsLimits.schedPolicy = ClassInfo.pc_cid; 3535 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3536 tsLimits.minPrio = -tsLimits.maxPrio; 3537 3538 strcpy(ClassInfo.pc_clname, "IA"); 3539 ClassInfo.pc_cid = -1; 3540 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3541 if (rslt < 0) return errno; 3542 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3543 iaLimits.schedPolicy = ClassInfo.pc_cid; 3544 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3545 iaLimits.minPrio = -iaLimits.maxPrio; 3546 3547 strcpy(ClassInfo.pc_clname, "RT"); 3548 ClassInfo.pc_cid = -1; 3549 rslt = (*priocntl_ptr)(PC_VERSION, P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3550 if (rslt < 0) return errno; 3551 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3552 rtLimits.schedPolicy = ClassInfo.pc_cid; 3553 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3554 rtLimits.minPrio = 0; 3555 3556 3557 // Query our "current" scheduling class. 3558 // This will normally be IA,TS or, rarely, RT. 3559 memset (&ParmInfo, 0, sizeof(ParmInfo)); 3560 ParmInfo.pc_cid = PC_CLNULL; 3561 rslt = (*priocntl_ptr) (PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo ); 3562 if ( rslt < 0 ) return errno; 3563 myClass = ParmInfo.pc_cid; 3564 3565 // We now know our scheduling classId, get specific information 3566 // the class. 3567 ClassInfo.pc_cid = myClass; 3568 ClassInfo.pc_clname[0] = 0; 3569 rslt = (*priocntl_ptr) (PC_VERSION, (idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo ); 3570 if ( rslt < 0 ) return errno; 3571 3572 if (ThreadPriorityVerbose) 3573 tty->print_cr ("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3574 3575 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3576 ParmInfo.pc_cid = PC_CLNULL; 3577 rslt = (*priocntl_ptr)(PC_VERSION, P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3578 if (rslt < 0) return errno; 3579 3580 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3581 myMin = rtLimits.minPrio; 3582 myMax = rtLimits.maxPrio; 3583 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3584 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3585 myMin = iaLimits.minPrio; 3586 myMax = iaLimits.maxPrio; 3587 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3588 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3589 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3590 myMin = tsLimits.minPrio; 3591 myMax = tsLimits.maxPrio; 3592 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3593 } else { 3594 // No clue - punt 3595 if (ThreadPriorityVerbose) 3596 tty->print_cr ("Unknown scheduling class: %s ... \n", ClassInfo.pc_clname); 3597 return EINVAL; // no clue, punt 3598 } 3599 3600 if (ThreadPriorityVerbose) 3601 tty->print_cr ("Thread priority Range: [%d..%d]\n", myMin, myMax); 3602 3603 priocntl_enable = true; // Enable changing priorities 3604 return 0; 3605} 3606 3607#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3608#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3609#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3610 3611 3612// scale_to_lwp_priority 3613// 3614// Convert from the libthread "thr_setprio" scale to our current 3615// lwp scheduling class scale. 3616// 3617static 3618int scale_to_lwp_priority (int rMin, int rMax, int x) 3619{ 3620 int v; 3621 3622 if (x == 127) return rMax; // avoid round-down 3623 v = (((x*(rMax-rMin)))/128)+rMin; 3624 return v; 3625} 3626 3627 3628// set_lwp_priority 3629// 3630// Set the priority of the lwp. This call should only be made 3631// when using bound threads (T2 threads are bound by default). 3632// 3633int set_lwp_priority (int ThreadID, int lwpid, int newPrio ) 3634{ 3635 int rslt; 3636 int Actual, Expected, prv; 3637 pcparms_t ParmInfo; // for GET-SET 3638#ifdef ASSERT 3639 pcparms_t ReadBack; // for readback 3640#endif 3641 3642 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3643 // Query current values. 3644 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3645 // Cache "pcparms_t" in global ParmCache. 3646 // TODO: elide set-to-same-value 3647 3648 // If something went wrong on init, don't change priorities. 3649 if ( !priocntl_enable ) { 3650 if (ThreadPriorityVerbose) 3651 tty->print_cr("Trying to set priority but init failed, ignoring"); 3652 return EINVAL; 3653 } 3654 3655 3656 // If lwp hasn't started yet, just return 3657 // the _start routine will call us again. 3658 if ( lwpid <= 0 ) { 3659 if (ThreadPriorityVerbose) { 3660 tty->print_cr ("deferring the set_lwp_priority of thread " INTPTR_FORMAT " to %d, lwpid not set", 3661 ThreadID, newPrio); 3662 } 3663 return 0; 3664 } 3665 3666 if (ThreadPriorityVerbose) { 3667 tty->print_cr ("set_lwp_priority(" INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3668 ThreadID, lwpid, newPrio); 3669 } 3670 3671 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3672 ParmInfo.pc_cid = PC_CLNULL; 3673 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3674 if (rslt < 0) return errno; 3675 3676 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3677 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3678 rtInfo->rt_pri = scale_to_lwp_priority (rtLimits.minPrio, rtLimits.maxPrio, newPrio); 3679 rtInfo->rt_tqsecs = RT_NOCHANGE; 3680 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3681 if (ThreadPriorityVerbose) { 3682 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3683 } 3684 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3685 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3686 int maxClamped = MIN2(iaLimits.maxPrio, (int)iaInfo->ia_uprilim); 3687 iaInfo->ia_upri = scale_to_lwp_priority(iaLimits.minPrio, maxClamped, newPrio); 3688 iaInfo->ia_uprilim = IA_NOCHANGE; 3689 iaInfo->ia_nice = IA_NOCHANGE; 3690 iaInfo->ia_mode = IA_NOCHANGE; 3691 if (ThreadPriorityVerbose) { 3692 tty->print_cr ("IA: [%d...%d] %d->%d\n", 3693 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3694 } 3695 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3696 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3697 int maxClamped = MIN2(tsLimits.maxPrio, (int)tsInfo->ts_uprilim); 3698 prv = tsInfo->ts_upri; 3699 tsInfo->ts_upri = scale_to_lwp_priority(tsLimits.minPrio, maxClamped, newPrio); 3700 tsInfo->ts_uprilim = IA_NOCHANGE; 3701 if (ThreadPriorityVerbose) { 3702 tty->print_cr ("TS: %d [%d...%d] %d->%d\n", 3703 prv, tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3704 } 3705 if (prv == tsInfo->ts_upri) return 0; 3706 } else { 3707 if ( ThreadPriorityVerbose ) { 3708 tty->print_cr ("Unknown scheduling class\n"); 3709 } 3710 return EINVAL; // no clue, punt 3711 } 3712 3713 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3714 if (ThreadPriorityVerbose && rslt) { 3715 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3716 } 3717 if (rslt < 0) return errno; 3718 3719#ifdef ASSERT 3720 // Sanity check: read back what we just attempted to set. 3721 // In theory it could have changed in the interim ... 3722 // 3723 // The priocntl system call is tricky. 3724 // Sometimes it'll validate the priority value argument and 3725 // return EINVAL if unhappy. At other times it fails silently. 3726 // Readbacks are prudent. 3727 3728 if (!ReadBackValidate) return 0; 3729 3730 memset(&ReadBack, 0, sizeof(pcparms_t)); 3731 ReadBack.pc_cid = PC_CLNULL; 3732 rslt = (*priocntl_ptr)(PC_VERSION, P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3733 assert(rslt >= 0, "priocntl failed"); 3734 Actual = Expected = 0xBAD; 3735 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3736 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3737 Actual = RTPRI(ReadBack)->rt_pri; 3738 Expected = RTPRI(ParmInfo)->rt_pri; 3739 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3740 Actual = IAPRI(ReadBack)->ia_upri; 3741 Expected = IAPRI(ParmInfo)->ia_upri; 3742 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3743 Actual = TSPRI(ReadBack)->ts_upri; 3744 Expected = TSPRI(ParmInfo)->ts_upri; 3745 } else { 3746 if ( ThreadPriorityVerbose ) { 3747 tty->print_cr("set_lwp_priority: unexpected class in readback: %d\n", ParmInfo.pc_cid); 3748 } 3749 } 3750 3751 if (Actual != Expected) { 3752 if ( ThreadPriorityVerbose ) { 3753 tty->print_cr ("set_lwp_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3754 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3755 } 3756 } 3757#endif 3758 3759 return 0; 3760} 3761 3762 3763 3764// Solaris only gives access to 128 real priorities at a time, 3765// so we expand Java's ten to fill this range. This would be better 3766// if we dynamically adjusted relative priorities. 3767// 3768// The ThreadPriorityPolicy option allows us to select 2 different 3769// priority scales. 3770// 3771// ThreadPriorityPolicy=0 3772// Since the Solaris' default priority is MaximumPriority, we do not 3773// set a priority lower than Max unless a priority lower than 3774// NormPriority is requested. 3775// 3776// ThreadPriorityPolicy=1 3777// This mode causes the priority table to get filled with 3778// linear values. NormPriority get's mapped to 50% of the 3779// Maximum priority an so on. This will cause VM threads 3780// to get unfair treatment against other Solaris processes 3781// which do not explicitly alter their thread priorities. 3782// 3783 3784 3785int os::java_to_os_priority[MaxPriority + 1] = { 3786 -99999, // 0 Entry should never be used 3787 3788 0, // 1 MinPriority 3789 32, // 2 3790 64, // 3 3791 3792 96, // 4 3793 127, // 5 NormPriority 3794 127, // 6 3795 3796 127, // 7 3797 127, // 8 3798 127, // 9 NearMaxPriority 3799 3800 127 // 10 MaxPriority 3801}; 3802 3803 3804OSReturn os::set_native_priority(Thread* thread, int newpri) { 3805 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3806 if ( !UseThreadPriorities ) return OS_OK; 3807 int status = thr_setprio(thread->osthread()->thread_id(), newpri); 3808 if ( os::Solaris::T2_libthread() || (UseBoundThreads && thread->osthread()->is_vm_created()) ) 3809 status |= (set_lwp_priority (thread->osthread()->thread_id(), 3810 thread->osthread()->lwp_id(), newpri )); 3811 return (status == 0) ? OS_OK : OS_ERR; 3812} 3813 3814 3815OSReturn os::get_native_priority(const Thread* const thread, int *priority_ptr) { 3816 int p; 3817 if ( !UseThreadPriorities ) { 3818 *priority_ptr = NormalPriority; 3819 return OS_OK; 3820 } 3821 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3822 if (status != 0) { 3823 return OS_ERR; 3824 } 3825 *priority_ptr = p; 3826 return OS_OK; 3827} 3828 3829 3830// Hint to the underlying OS that a task switch would not be good. 3831// Void return because it's a hint and can fail. 3832void os::hint_no_preempt() { 3833 schedctl_start(schedctl_init()); 3834} 3835 3836void os::interrupt(Thread* thread) { 3837 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3838 3839 OSThread* osthread = thread->osthread(); 3840 3841 int isInterrupted = osthread->interrupted(); 3842 if (!isInterrupted) { 3843 osthread->set_interrupted(true); 3844 OrderAccess::fence(); 3845 // os::sleep() is implemented with either poll (NULL,0,timeout) or 3846 // by parking on _SleepEvent. If the former, thr_kill will unwedge 3847 // the sleeper by SIGINTR, otherwise the unpark() will wake the sleeper. 3848 ParkEvent * const slp = thread->_SleepEvent ; 3849 if (slp != NULL) slp->unpark() ; 3850 } 3851 3852 // For JSR166: unpark after setting status but before thr_kill -dl 3853 if (thread->is_Java_thread()) { 3854 ((JavaThread*)thread)->parker()->unpark(); 3855 } 3856 3857 // Handle interruptible wait() ... 3858 ParkEvent * const ev = thread->_ParkEvent ; 3859 if (ev != NULL) ev->unpark() ; 3860 3861 // When events are used everywhere for os::sleep, then this thr_kill 3862 // will only be needed if UseVMInterruptibleIO is true. 3863 3864 if (!isInterrupted) { 3865 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGinterrupt()); 3866 assert_status(status == 0, status, "thr_kill"); 3867 3868 // Bump thread interruption counter 3869 RuntimeService::record_thread_interrupt_signaled_count(); 3870 } 3871} 3872 3873 3874bool os::is_interrupted(Thread* thread, bool clear_interrupted) { 3875 assert(Thread::current() == thread || Threads_lock->owned_by_self(), "possibility of dangling Thread pointer"); 3876 3877 OSThread* osthread = thread->osthread(); 3878 3879 bool res = osthread->interrupted(); 3880 3881 // NOTE that since there is no "lock" around these two operations, 3882 // there is the possibility that the interrupted flag will be 3883 // "false" but that the interrupt event will be set. This is 3884 // intentional. The effect of this is that Object.wait() will appear 3885 // to have a spurious wakeup, which is not harmful, and the 3886 // possibility is so rare that it is not worth the added complexity 3887 // to add yet another lock. It has also been recommended not to put 3888 // the interrupted flag into the os::Solaris::Event structure, 3889 // because it hides the issue. 3890 if (res && clear_interrupted) { 3891 osthread->set_interrupted(false); 3892 } 3893 return res; 3894} 3895 3896 3897void os::print_statistics() { 3898} 3899 3900int os::message_box(const char* title, const char* message) { 3901 int i; 3902 fdStream err(defaultStream::error_fd()); 3903 for (i = 0; i < 78; i++) err.print_raw("="); 3904 err.cr(); 3905 err.print_raw_cr(title); 3906 for (i = 0; i < 78; i++) err.print_raw("-"); 3907 err.cr(); 3908 err.print_raw_cr(message); 3909 for (i = 0; i < 78; i++) err.print_raw("="); 3910 err.cr(); 3911 3912 char buf[16]; 3913 // Prevent process from exiting upon "read error" without consuming all CPU 3914 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3915 3916 return buf[0] == 'y' || buf[0] == 'Y'; 3917} 3918 3919// A lightweight implementation that does not suspend the target thread and 3920// thus returns only a hint. Used for profiling only! 3921ExtendedPC os::get_thread_pc(Thread* thread) { 3922 // Make sure that it is called by the watcher and the Threads lock is owned. 3923 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3924 // For now, is only used to profile the VM Thread 3925 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3926 ExtendedPC epc; 3927 3928 GetThreadPC_Callback cb(ProfileVM_lock); 3929 OSThread *osthread = thread->osthread(); 3930 const int time_to_wait = 400; // 400ms wait for initial response 3931 int status = cb.interrupt(thread, time_to_wait); 3932 3933 if (cb.is_done() ) { 3934 epc = cb.addr(); 3935 } else { 3936 DEBUG_ONLY(tty->print_cr("Failed to get pc for thread: %d got %d status", 3937 osthread->thread_id(), status);); 3938 // epc is already NULL 3939 } 3940 return epc; 3941} 3942 3943 3944// This does not do anything on Solaris. This is basically a hook for being 3945// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3946void os::os_exception_wrapper(java_call_t f, JavaValue* value, methodHandle* method, JavaCallArguments* args, Thread* thread) { 3947 f(value, method, args, thread); 3948} 3949 3950// This routine may be used by user applications as a "hook" to catch signals. 3951// The user-defined signal handler must pass unrecognized signals to this 3952// routine, and if it returns true (non-zero), then the signal handler must 3953// return immediately. If the flag "abort_if_unrecognized" is true, then this 3954// routine will never retun false (zero), but instead will execute a VM panic 3955// routine kill the process. 3956// 3957// If this routine returns false, it is OK to call it again. This allows 3958// the user-defined signal handler to perform checks either before or after 3959// the VM performs its own checks. Naturally, the user code would be making 3960// a serious error if it tried to handle an exception (such as a null check 3961// or breakpoint) that the VM was generating for its own correct operation. 3962// 3963// This routine may recognize any of the following kinds of signals: 3964// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3965// os::Solaris::SIGasync 3966// It should be consulted by handlers for any of those signals. 3967// It explicitly does not recognize os::Solaris::SIGinterrupt 3968// 3969// The caller of this routine must pass in the three arguments supplied 3970// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3971// field of the structure passed to sigaction(). This routine assumes that 3972// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3973// 3974// Note that the VM will print warnings if it detects conflicting signal 3975// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3976// 3977extern "C" int JVM_handle_solaris_signal(int signo, siginfo_t* siginfo, void* ucontext, int abort_if_unrecognized); 3978 3979 3980void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3981 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3982} 3983 3984/* Do not delete - if guarantee is ever removed, a signal handler (even empty) 3985 is needed to provoke threads blocked on IO to return an EINTR 3986 Note: this explicitly does NOT call JVM_handle_solaris_signal and 3987 does NOT participate in signal chaining due to requirement for 3988 NOT setting SA_RESTART to make EINTR work. */ 3989extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3990 if (UseSignalChaining) { 3991 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3992 if (actp && actp->sa_handler) { 3993 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3994 } 3995 } 3996} 3997 3998// This boolean allows users to forward their own non-matching signals 3999// to JVM_handle_solaris_signal, harmlessly. 4000bool os::Solaris::signal_handlers_are_installed = false; 4001 4002// For signal-chaining 4003bool os::Solaris::libjsig_is_loaded = false; 4004typedef struct sigaction *(*get_signal_t)(int); 4005get_signal_t os::Solaris::get_signal_action = NULL; 4006 4007struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 4008 struct sigaction *actp = NULL; 4009 4010 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 4011 // Retrieve the old signal handler from libjsig 4012 actp = (*get_signal_action)(sig); 4013 } 4014 if (actp == NULL) { 4015 // Retrieve the preinstalled signal handler from jvm 4016 actp = get_preinstalled_handler(sig); 4017 } 4018 4019 return actp; 4020} 4021 4022static bool call_chained_handler(struct sigaction *actp, int sig, 4023 siginfo_t *siginfo, void *context) { 4024 // Call the old signal handler 4025 if (actp->sa_handler == SIG_DFL) { 4026 // It's more reasonable to let jvm treat it as an unexpected exception 4027 // instead of taking the default action. 4028 return false; 4029 } else if (actp->sa_handler != SIG_IGN) { 4030 if ((actp->sa_flags & SA_NODEFER) == 0) { 4031 // automaticlly block the signal 4032 sigaddset(&(actp->sa_mask), sig); 4033 } 4034 4035 sa_handler_t hand; 4036 sa_sigaction_t sa; 4037 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4038 // retrieve the chained handler 4039 if (siginfo_flag_set) { 4040 sa = actp->sa_sigaction; 4041 } else { 4042 hand = actp->sa_handler; 4043 } 4044 4045 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4046 actp->sa_handler = SIG_DFL; 4047 } 4048 4049 // try to honor the signal mask 4050 sigset_t oset; 4051 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4052 4053 // call into the chained handler 4054 if (siginfo_flag_set) { 4055 (*sa)(sig, siginfo, context); 4056 } else { 4057 (*hand)(sig); 4058 } 4059 4060 // restore the signal mask 4061 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4062 } 4063 // Tell jvm's signal handler the signal is taken care of. 4064 return true; 4065} 4066 4067bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4068 bool chained = false; 4069 // signal-chaining 4070 if (UseSignalChaining) { 4071 struct sigaction *actp = get_chained_signal_action(sig); 4072 if (actp != NULL) { 4073 chained = call_chained_handler(actp, sig, siginfo, context); 4074 } 4075 } 4076 return chained; 4077} 4078 4079struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4080 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4081 if (preinstalled_sigs[sig] != 0) { 4082 return &chainedsigactions[sig]; 4083 } 4084 return NULL; 4085} 4086 4087void os::Solaris::save_preinstalled_handler(int sig, struct sigaction& oldAct) { 4088 4089 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4090 assert((chainedsigactions != (struct sigaction *)NULL) && (preinstalled_sigs != (int *)NULL) , "signals not yet initialized"); 4091 chainedsigactions[sig] = oldAct; 4092 preinstalled_sigs[sig] = 1; 4093} 4094 4095void os::Solaris::set_signal_handler(int sig, bool set_installed, bool oktochain) { 4096 // Check for overwrite. 4097 struct sigaction oldAct; 4098 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4099 void* oldhand = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4100 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4101 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4102 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4103 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4104 if (AllowUserSignalHandlers || !set_installed) { 4105 // Do not overwrite; user takes responsibility to forward to us. 4106 return; 4107 } else if (UseSignalChaining) { 4108 if (oktochain) { 4109 // save the old handler in jvm 4110 save_preinstalled_handler(sig, oldAct); 4111 } else { 4112 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4113 } 4114 // libjsig also interposes the sigaction() call below and saves the 4115 // old sigaction on it own. 4116 } else { 4117 fatal2("Encountered unexpected pre-existing sigaction handler %#lx for signal %d.", (long)oldhand, sig); 4118 } 4119 } 4120 4121 struct sigaction sigAct; 4122 sigfillset(&(sigAct.sa_mask)); 4123 sigAct.sa_handler = SIG_DFL; 4124 4125 sigAct.sa_sigaction = signalHandler; 4126 // Handle SIGSEGV on alternate signal stack if 4127 // not using stack banging 4128 if (!UseStackBanging && sig == SIGSEGV) { 4129 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4130 // Interruptible i/o requires SA_RESTART cleared so EINTR 4131 // is returned instead of restarting system calls 4132 } else if (sig == os::Solaris::SIGinterrupt()) { 4133 sigemptyset(&sigAct.sa_mask); 4134 sigAct.sa_handler = NULL; 4135 sigAct.sa_flags = SA_SIGINFO; 4136 sigAct.sa_sigaction = sigINTRHandler; 4137 } else { 4138 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4139 } 4140 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4141 4142 sigaction(sig, &sigAct, &oldAct); 4143 4144 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4145 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4146 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4147} 4148 4149 4150#define DO_SIGNAL_CHECK(sig) \ 4151 if (!sigismember(&check_signal_done, sig)) \ 4152 os::Solaris::check_signal_handler(sig) 4153 4154// This method is a periodic task to check for misbehaving JNI applications 4155// under CheckJNI, we can add any periodic checks here 4156 4157void os::run_periodic_checks() { 4158 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4159 // thereby preventing a NULL checks. 4160 if(!check_addr0_done) check_addr0_done = check_addr0(tty); 4161 4162 if (check_signals == false) return; 4163 4164 // SEGV and BUS if overridden could potentially prevent 4165 // generation of hs*.log in the event of a crash, debugging 4166 // such a case can be very challenging, so we absolutely 4167 // check for the following for a good measure: 4168 DO_SIGNAL_CHECK(SIGSEGV); 4169 DO_SIGNAL_CHECK(SIGILL); 4170 DO_SIGNAL_CHECK(SIGFPE); 4171 DO_SIGNAL_CHECK(SIGBUS); 4172 DO_SIGNAL_CHECK(SIGPIPE); 4173 DO_SIGNAL_CHECK(SIGXFSZ); 4174 4175 // ReduceSignalUsage allows the user to override these handlers 4176 // see comments at the very top and jvm_solaris.h 4177 if (!ReduceSignalUsage) { 4178 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4179 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4180 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4181 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4182 } 4183 4184 // See comments above for using JVM1/JVM2 and UseAltSigs 4185 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4186 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4187 4188} 4189 4190typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4191 4192static os_sigaction_t os_sigaction = NULL; 4193 4194void os::Solaris::check_signal_handler(int sig) { 4195 char buf[O_BUFLEN]; 4196 address jvmHandler = NULL; 4197 4198 struct sigaction act; 4199 if (os_sigaction == NULL) { 4200 // only trust the default sigaction, in case it has been interposed 4201 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4202 if (os_sigaction == NULL) return; 4203 } 4204 4205 os_sigaction(sig, (struct sigaction*)NULL, &act); 4206 4207 address thisHandler = (act.sa_flags & SA_SIGINFO) 4208 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4209 : CAST_FROM_FN_PTR(address, act.sa_handler) ; 4210 4211 4212 switch(sig) { 4213 case SIGSEGV: 4214 case SIGBUS: 4215 case SIGFPE: 4216 case SIGPIPE: 4217 case SIGXFSZ: 4218 case SIGILL: 4219 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4220 break; 4221 4222 case SHUTDOWN1_SIGNAL: 4223 case SHUTDOWN2_SIGNAL: 4224 case SHUTDOWN3_SIGNAL: 4225 case BREAK_SIGNAL: 4226 jvmHandler = (address)user_handler(); 4227 break; 4228 4229 default: 4230 int intrsig = os::Solaris::SIGinterrupt(); 4231 int asynsig = os::Solaris::SIGasync(); 4232 4233 if (sig == intrsig) { 4234 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4235 } else if (sig == asynsig) { 4236 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4237 } else { 4238 return; 4239 } 4240 break; 4241 } 4242 4243 4244 if (thisHandler != jvmHandler) { 4245 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4246 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4247 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4248 // No need to check this sig any longer 4249 sigaddset(&check_signal_done, sig); 4250 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4251 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4252 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4253 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4254 // No need to check this sig any longer 4255 sigaddset(&check_signal_done, sig); 4256 } 4257 4258 // Print all the signal handler state 4259 if (sigismember(&check_signal_done, sig)) { 4260 print_signal_handlers(tty, buf, O_BUFLEN); 4261 } 4262 4263} 4264 4265void os::Solaris::install_signal_handlers() { 4266 bool libjsigdone = false; 4267 signal_handlers_are_installed = true; 4268 4269 // signal-chaining 4270 typedef void (*signal_setting_t)(); 4271 signal_setting_t begin_signal_setting = NULL; 4272 signal_setting_t end_signal_setting = NULL; 4273 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4274 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4275 if (begin_signal_setting != NULL) { 4276 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4277 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4278 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4279 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4280 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4281 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4282 libjsig_is_loaded = true; 4283 if (os::Solaris::get_libjsig_version != NULL) { 4284 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4285 } 4286 assert(UseSignalChaining, "should enable signal-chaining"); 4287 } 4288 if (libjsig_is_loaded) { 4289 // Tell libjsig jvm is setting signal handlers 4290 (*begin_signal_setting)(); 4291 } 4292 4293 set_signal_handler(SIGSEGV, true, true); 4294 set_signal_handler(SIGPIPE, true, true); 4295 set_signal_handler(SIGXFSZ, true, true); 4296 set_signal_handler(SIGBUS, true, true); 4297 set_signal_handler(SIGILL, true, true); 4298 set_signal_handler(SIGFPE, true, true); 4299 4300 4301 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4302 4303 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4304 // can not register overridable signals which might be > 32 4305 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4306 // Tell libjsig jvm has finished setting signal handlers 4307 (*end_signal_setting)(); 4308 libjsigdone = true; 4309 } 4310 } 4311 4312 // Never ok to chain our SIGinterrupt 4313 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4314 set_signal_handler(os::Solaris::SIGasync(), true, true); 4315 4316 if (libjsig_is_loaded && !libjsigdone) { 4317 // Tell libjsig jvm finishes setting signal handlers 4318 (*end_signal_setting)(); 4319 } 4320 4321 // We don't activate signal checker if libjsig is in place, we trust ourselves 4322 // and if UserSignalHandler is installed all bets are off 4323 if (CheckJNICalls) { 4324 if (libjsig_is_loaded) { 4325 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4326 check_signals = false; 4327 } 4328 if (AllowUserSignalHandlers) { 4329 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4330 check_signals = false; 4331 } 4332 } 4333} 4334 4335 4336void report_error(const char* file_name, int line_no, const char* title, const char* format, ...); 4337 4338const char * signames[] = { 4339 "SIG0", 4340 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4341 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4342 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4343 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4344 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4345 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4346 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4347 "SIGCANCEL", "SIGLOST" 4348}; 4349 4350const char* os::exception_name(int exception_code, char* buf, size_t size) { 4351 if (0 < exception_code && exception_code <= SIGRTMAX) { 4352 // signal 4353 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4354 jio_snprintf(buf, size, "%s", signames[exception_code]); 4355 } else { 4356 jio_snprintf(buf, size, "SIG%d", exception_code); 4357 } 4358 return buf; 4359 } else { 4360 return NULL; 4361 } 4362} 4363 4364// (Static) wrappers for the new libthread API 4365int_fnP_thread_t_iP_uP_stack_tP_gregset_t os::Solaris::_thr_getstate; 4366int_fnP_thread_t_i_gregset_t os::Solaris::_thr_setstate; 4367int_fnP_thread_t_i os::Solaris::_thr_setmutator; 4368int_fnP_thread_t os::Solaris::_thr_suspend_mutator; 4369int_fnP_thread_t os::Solaris::_thr_continue_mutator; 4370 4371// (Static) wrappers for the liblgrp API 4372os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4373os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4374os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4375os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4376os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4377os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4378os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4379os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4380os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4381 4382// (Static) wrapper for meminfo() call. 4383os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4384 4385static address resolve_symbol(const char *name) { 4386 address addr; 4387 4388 addr = (address) dlsym(RTLD_DEFAULT, name); 4389 if(addr == NULL) { 4390 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4391 addr = (address) dlsym(RTLD_NEXT, name); 4392 if(addr == NULL) { 4393 fatal(dlerror()); 4394 } 4395 } 4396 return addr; 4397} 4398 4399 4400 4401// isT2_libthread() 4402// 4403// Routine to determine if we are currently using the new T2 libthread. 4404// 4405// We determine if we are using T2 by reading /proc/self/lstatus and 4406// looking for a thread with the ASLWP bit set. If we find this status 4407// bit set, we must assume that we are NOT using T2. The T2 team 4408// has approved this algorithm. 4409// 4410// We need to determine if we are running with the new T2 libthread 4411// since setting native thread priorities is handled differently 4412// when using this library. All threads created using T2 are bound 4413// threads. Calling thr_setprio is meaningless in this case. 4414// 4415bool isT2_libthread() { 4416 static prheader_t * lwpArray = NULL; 4417 static int lwpSize = 0; 4418 static int lwpFile = -1; 4419 lwpstatus_t * that; 4420 char lwpName [128]; 4421 bool isT2 = false; 4422 4423#define ADR(x) ((uintptr_t)(x)) 4424#define LWPINDEX(ary,ix) ((lwpstatus_t *)(((ary)->pr_entsize * (ix)) + (ADR((ary) + 1)))) 4425 4426 lwpFile = open("/proc/self/lstatus", O_RDONLY, 0); 4427 if (lwpFile < 0) { 4428 if (ThreadPriorityVerbose) warning ("Couldn't open /proc/self/lstatus\n"); 4429 return false; 4430 } 4431 lwpSize = 16*1024; 4432 for (;;) { 4433 lseek (lwpFile, 0, SEEK_SET); 4434 lwpArray = (prheader_t *)NEW_C_HEAP_ARRAY(char, lwpSize); 4435 if (read(lwpFile, lwpArray, lwpSize) < 0) { 4436 if (ThreadPriorityVerbose) warning("Error reading /proc/self/lstatus\n"); 4437 break; 4438 } 4439 if ((lwpArray->pr_nent * lwpArray->pr_entsize) <= lwpSize) { 4440 // We got a good snapshot - now iterate over the list. 4441 int aslwpcount = 0; 4442 for (int i = 0; i < lwpArray->pr_nent; i++ ) { 4443 that = LWPINDEX(lwpArray,i); 4444 if (that->pr_flags & PR_ASLWP) { 4445 aslwpcount++; 4446 } 4447 } 4448 if (aslwpcount == 0) isT2 = true; 4449 break; 4450 } 4451 lwpSize = lwpArray->pr_nent * lwpArray->pr_entsize; 4452 FREE_C_HEAP_ARRAY(char, lwpArray); // retry. 4453 } 4454 4455 FREE_C_HEAP_ARRAY(char, lwpArray); 4456 close (lwpFile); 4457 if (ThreadPriorityVerbose) { 4458 if (isT2) tty->print_cr("We are running with a T2 libthread\n"); 4459 else tty->print_cr("We are not running with a T2 libthread\n"); 4460 } 4461 return isT2; 4462} 4463 4464 4465void os::Solaris::libthread_init() { 4466 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4467 4468 // Determine if we are running with the new T2 libthread 4469 os::Solaris::set_T2_libthread(isT2_libthread()); 4470 4471 lwp_priocntl_init(); 4472 4473 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4474 if(func == NULL) { 4475 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4476 // Guarantee that this VM is running on an new enough OS (5.6 or 4477 // later) that it will have a new enough libthread.so. 4478 guarantee(func != NULL, "libthread.so is too old."); 4479 } 4480 4481 // Initialize the new libthread getstate API wrappers 4482 func = resolve_symbol("thr_getstate"); 4483 os::Solaris::set_thr_getstate(CAST_TO_FN_PTR(int_fnP_thread_t_iP_uP_stack_tP_gregset_t, func)); 4484 4485 func = resolve_symbol("thr_setstate"); 4486 os::Solaris::set_thr_setstate(CAST_TO_FN_PTR(int_fnP_thread_t_i_gregset_t, func)); 4487 4488 func = resolve_symbol("thr_setmutator"); 4489 os::Solaris::set_thr_setmutator(CAST_TO_FN_PTR(int_fnP_thread_t_i, func)); 4490 4491 func = resolve_symbol("thr_suspend_mutator"); 4492 os::Solaris::set_thr_suspend_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4493 4494 func = resolve_symbol("thr_continue_mutator"); 4495 os::Solaris::set_thr_continue_mutator(CAST_TO_FN_PTR(int_fnP_thread_t, func)); 4496 4497 int size; 4498 void (*handler_info_func)(address *, int *); 4499 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4500 handler_info_func(&handler_start, &size); 4501 handler_end = handler_start + size; 4502} 4503 4504 4505int_fnP_mutex_tP os::Solaris::_mutex_lock; 4506int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4507int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4508int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4509int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4510int os::Solaris::_mutex_scope = USYNC_THREAD; 4511 4512int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4513int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4514int_fnP_cond_tP os::Solaris::_cond_signal; 4515int_fnP_cond_tP os::Solaris::_cond_broadcast; 4516int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4517int_fnP_cond_tP os::Solaris::_cond_destroy; 4518int os::Solaris::_cond_scope = USYNC_THREAD; 4519 4520void os::Solaris::synchronization_init() { 4521 if(UseLWPSynchronization) { 4522 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4523 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4524 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4525 os::Solaris::set_mutex_init(lwp_mutex_init); 4526 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4527 os::Solaris::set_mutex_scope(USYNC_THREAD); 4528 4529 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4530 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4531 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4532 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4533 os::Solaris::set_cond_init(lwp_cond_init); 4534 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4535 os::Solaris::set_cond_scope(USYNC_THREAD); 4536 } 4537 else { 4538 os::Solaris::set_mutex_scope(USYNC_THREAD); 4539 os::Solaris::set_cond_scope(USYNC_THREAD); 4540 4541 if(UsePthreads) { 4542 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4543 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4544 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4545 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4546 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4547 4548 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4549 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4550 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4551 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4552 os::Solaris::set_cond_init(pthread_cond_default_init); 4553 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4554 } 4555 else { 4556 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4557 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4558 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4559 os::Solaris::set_mutex_init(::mutex_init); 4560 os::Solaris::set_mutex_destroy(::mutex_destroy); 4561 4562 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4563 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4564 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4565 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4566 os::Solaris::set_cond_init(::cond_init); 4567 os::Solaris::set_cond_destroy(::cond_destroy); 4568 } 4569 } 4570} 4571 4572void os::Solaris::liblgrp_init() { 4573 void *handle = dlopen("liblgrp.so", RTLD_LAZY); 4574 if (handle != NULL) { 4575 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4576 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4577 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4578 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4579 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4580 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4581 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4582 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4583 dlsym(handle, "lgrp_cookie_stale"))); 4584 4585 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4586 set_lgrp_cookie(c); 4587 } else { 4588 warning("your OS does not support NUMA"); 4589 } 4590} 4591 4592void os::Solaris::misc_sym_init() { 4593 address func = (address)dlsym(RTLD_DEFAULT, "meminfo"); 4594 if(func == NULL) { 4595 func = (address) dlsym(RTLD_NEXT, "meminfo"); 4596 } 4597 if (func != NULL) { 4598 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4599 } 4600} 4601 4602// Symbol doesn't exist in Solaris 8 pset.h 4603#ifndef PS_MYID 4604#define PS_MYID -3 4605#endif 4606 4607// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4608typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4609static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4610 4611void init_pset_getloadavg_ptr(void) { 4612 pset_getloadavg_ptr = 4613 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4614 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4615 warning("pset_getloadavg function not found"); 4616 } 4617} 4618 4619int os::Solaris::_dev_zero_fd = -1; 4620 4621// this is called _before_ the global arguments have been parsed 4622void os::init(void) { 4623 _initial_pid = getpid(); 4624 4625 max_hrtime = first_hrtime = gethrtime(); 4626 4627 init_random(1234567); 4628 4629 page_size = sysconf(_SC_PAGESIZE); 4630 if (page_size == -1) 4631 fatal1("os_solaris.cpp: os::init: sysconf failed (%s)", strerror(errno)); 4632 init_page_sizes((size_t) page_size); 4633 4634 Solaris::initialize_system_info(); 4635 4636 int fd = open("/dev/zero", O_RDWR); 4637 if (fd < 0) { 4638 fatal1("os::init: cannot open /dev/zero (%s)", strerror(errno)); 4639 } else { 4640 Solaris::set_dev_zero_fd(fd); 4641 4642 // Close on exec, child won't inherit. 4643 fcntl(fd, F_SETFD, FD_CLOEXEC); 4644 } 4645 4646 clock_tics_per_sec = CLK_TCK; 4647 4648 // check if dladdr1() exists; dladdr1 can provide more information than 4649 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4650 // and is available on linker patches for 5.7 and 5.8. 4651 // libdl.so must have been loaded, this call is just an entry lookup 4652 void * hdl = dlopen("libdl.so", RTLD_NOW); 4653 if (hdl) 4654 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4655 4656 // (Solaris only) this switches to calls that actually do locking. 4657 ThreadCritical::initialize(); 4658 4659 main_thread = thr_self(); 4660 4661 // Constant minimum stack size allowed. It must be at least 4662 // the minimum of what the OS supports (thr_min_stack()), and 4663 // enough to allow the thread to get to user bytecode execution. 4664 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4665 // If the pagesize of the VM is greater than 8K determine the appropriate 4666 // number of initial guard pages. The user can change this with the 4667 // command line arguments, if needed. 4668 if (vm_page_size() > 8*K) { 4669 StackYellowPages = 1; 4670 StackRedPages = 1; 4671 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4672 } 4673} 4674 4675// To install functions for atexit system call 4676extern "C" { 4677 static void perfMemory_exit_helper() { 4678 perfMemory_exit(); 4679 } 4680} 4681 4682// this is called _after_ the global arguments have been parsed 4683jint os::init_2(void) { 4684 // try to enable extended file IO ASAP, see 6431278 4685 os::Solaris::try_enable_extended_io(); 4686 4687 // Allocate a single page and mark it as readable for safepoint polling. Also 4688 // use this first mmap call to check support for MAP_ALIGN. 4689 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4690 page_size, 4691 MAP_PRIVATE | MAP_ALIGN, 4692 PROT_READ); 4693 if (polling_page == NULL) { 4694 has_map_align = false; 4695 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4696 PROT_READ); 4697 } 4698 4699 os::set_polling_page(polling_page); 4700 4701#ifndef PRODUCT 4702 if( Verbose && PrintMiscellaneous ) 4703 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", (intptr_t)polling_page); 4704#endif 4705 4706 if (!UseMembar) { 4707 address mem_serialize_page = (address)Solaris::mmap_chunk( NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE ); 4708 guarantee( mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4709 os::set_memory_serialize_page( mem_serialize_page ); 4710 4711#ifndef PRODUCT 4712 if(Verbose && PrintMiscellaneous) 4713 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", (intptr_t)mem_serialize_page); 4714#endif 4715} 4716 4717 FLAG_SET_DEFAULT(UseLargePages, os::large_page_init()); 4718 4719 // Check minimum allowable stack size for thread creation and to initialize 4720 // the java system classes, including StackOverflowError - depends on page 4721 // size. Add a page for compiler2 recursion in main thread. 4722 // Add in BytesPerWord times page size to account for VM stack during 4723 // class initialization depending on 32 or 64 bit VM. 4724 guarantee((Solaris::min_stack_allowed >= 4725 (StackYellowPages+StackRedPages+StackShadowPages+BytesPerWord 4726 COMPILER2_PRESENT(+1)) * page_size), 4727 "need to increase Solaris::min_stack_allowed on this platform"); 4728 4729 size_t threadStackSizeInBytes = ThreadStackSize * K; 4730 if (threadStackSizeInBytes != 0 && 4731 threadStackSizeInBytes < Solaris::min_stack_allowed) { 4732 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4733 Solaris::min_stack_allowed/K); 4734 return JNI_ERR; 4735 } 4736 4737 // For 64kbps there will be a 64kb page size, which makes 4738 // the usable default stack size quite a bit less. Increase the 4739 // stack for 64kb (or any > than 8kb) pages, this increases 4740 // virtual memory fragmentation (since we're not creating the 4741 // stack on a power of 2 boundary. The real fix for this 4742 // should be to fix the guard page mechanism. 4743 4744 if (vm_page_size() > 8*K) { 4745 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4746 ? threadStackSizeInBytes + 4747 ((StackYellowPages + StackRedPages) * vm_page_size()) 4748 : 0; 4749 ThreadStackSize = threadStackSizeInBytes/K; 4750 } 4751 4752 // Make the stack size a multiple of the page size so that 4753 // the yellow/red zones can be guarded. 4754 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4755 vm_page_size())); 4756 4757 Solaris::libthread_init(); 4758 if (UseNUMA) { 4759 Solaris::liblgrp_init(); 4760 } 4761 Solaris::misc_sym_init(); 4762 Solaris::signal_sets_init(); 4763 Solaris::init_signal_mem(); 4764 Solaris::install_signal_handlers(); 4765 4766 if (libjsigversion < JSIG_VERSION_1_4_1) { 4767 Maxlibjsigsigs = OLDMAXSIGNUM; 4768 } 4769 4770 // initialize synchronization primitives to use either thread or 4771 // lwp synchronization (controlled by UseLWPSynchronization) 4772 Solaris::synchronization_init(); 4773 4774 if (MaxFDLimit) { 4775 // set the number of file descriptors to max. print out error 4776 // if getrlimit/setrlimit fails but continue regardless. 4777 struct rlimit nbr_files; 4778 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4779 if (status != 0) { 4780 if (PrintMiscellaneous && (Verbose || WizardMode)) 4781 perror("os::init_2 getrlimit failed"); 4782 } else { 4783 nbr_files.rlim_cur = nbr_files.rlim_max; 4784 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4785 if (status != 0) { 4786 if (PrintMiscellaneous && (Verbose || WizardMode)) 4787 perror("os::init_2 setrlimit failed"); 4788 } 4789 } 4790 } 4791 4792 // Initialize HPI. 4793 jint hpi_result = hpi::initialize(); 4794 if (hpi_result != JNI_OK) { 4795 tty->print_cr("There was an error trying to initialize the HPI library."); 4796 return hpi_result; 4797 } 4798 4799 // Calculate theoretical max. size of Threads to guard gainst 4800 // artifical out-of-memory situations, where all available address- 4801 // space has been reserved by thread stacks. Default stack size is 1Mb. 4802 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4803 JavaThread::stack_size_at_create() : (1*K*K); 4804 assert(pre_thread_stack_size != 0, "Must have a stack"); 4805 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4806 // we should start doing Virtual Memory banging. Currently when the threads will 4807 // have used all but 200Mb of space. 4808 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4809 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4810 4811 // at-exit methods are called in the reverse order of their registration. 4812 // In Solaris 7 and earlier, atexit functions are called on return from 4813 // main or as a result of a call to exit(3C). There can be only 32 of 4814 // these functions registered and atexit() does not set errno. In Solaris 4815 // 8 and later, there is no limit to the number of functions registered 4816 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4817 // functions are called upon dlclose(3DL) in addition to return from main 4818 // and exit(3C). 4819 4820 if (PerfAllowAtExitRegistration) { 4821 // only register atexit functions if PerfAllowAtExitRegistration is set. 4822 // atexit functions can be delayed until process exit time, which 4823 // can be problematic for embedded VM situations. Embedded VMs should 4824 // call DestroyJavaVM() to assure that VM resources are released. 4825 4826 // note: perfMemory_exit_helper atexit function may be removed in 4827 // the future if the appropriate cleanup code can be added to the 4828 // VM_Exit VMOperation's doit method. 4829 if (atexit(perfMemory_exit_helper) != 0) { 4830 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4831 } 4832 } 4833 4834 // Init pset_loadavg function pointer 4835 init_pset_getloadavg_ptr(); 4836 4837 return JNI_OK; 4838} 4839 4840 4841// Mark the polling page as unreadable 4842void os::make_polling_page_unreadable(void) { 4843 if( mprotect((char *)_polling_page, page_size, PROT_NONE) != 0 ) 4844 fatal("Could not disable polling page"); 4845}; 4846 4847// Mark the polling page as readable 4848void os::make_polling_page_readable(void) { 4849 if( mprotect((char *)_polling_page, page_size, PROT_READ) != 0 ) 4850 fatal("Could not enable polling page"); 4851}; 4852 4853// OS interface. 4854 4855int os::stat(const char *path, struct stat *sbuf) { 4856 char pathbuf[MAX_PATH]; 4857 if (strlen(path) > MAX_PATH - 1) { 4858 errno = ENAMETOOLONG; 4859 return -1; 4860 } 4861 hpi::native_path(strcpy(pathbuf, path)); 4862 return ::stat(pathbuf, sbuf); 4863} 4864 4865 4866bool os::check_heap(bool force) { return true; } 4867 4868typedef int (*vsnprintf_t)(char* buf, size_t count, const char* fmt, va_list argptr); 4869static vsnprintf_t sol_vsnprintf = NULL; 4870 4871int local_vsnprintf(char* buf, size_t count, const char* fmt, va_list argptr) { 4872 if (!sol_vsnprintf) { 4873 //search for the named symbol in the objects that were loaded after libjvm 4874 void* where = RTLD_NEXT; 4875 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4876 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4877 if (!sol_vsnprintf){ 4878 //search for the named symbol in the objects that were loaded before libjvm 4879 where = RTLD_DEFAULT; 4880 if ((sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "__vsnprintf"))) == NULL) 4881 sol_vsnprintf = CAST_TO_FN_PTR(vsnprintf_t, dlsym(where, "vsnprintf")); 4882 assert(sol_vsnprintf != NULL, "vsnprintf not found"); 4883 } 4884 } 4885 return (*sol_vsnprintf)(buf, count, fmt, argptr); 4886} 4887 4888 4889// Is a (classpath) directory empty? 4890bool os::dir_is_empty(const char* path) { 4891 DIR *dir = NULL; 4892 struct dirent *ptr; 4893 4894 dir = opendir(path); 4895 if (dir == NULL) return true; 4896 4897 /* Scan the directory */ 4898 bool result = true; 4899 char buf[sizeof(struct dirent) + MAX_PATH]; 4900 struct dirent *dbuf = (struct dirent *) buf; 4901 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4902 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4903 result = false; 4904 } 4905 } 4906 closedir(dir); 4907 return result; 4908} 4909 4910// create binary file, rewriting existing file if required 4911int os::create_binary_file(const char* path, bool rewrite_existing) { 4912 int oflags = O_WRONLY | O_CREAT; 4913 if (!rewrite_existing) { 4914 oflags |= O_EXCL; 4915 } 4916 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4917} 4918 4919// return current position of file pointer 4920jlong os::current_file_offset(int fd) { 4921 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4922} 4923 4924// move file pointer to the specified offset 4925jlong os::seek_to_file_offset(int fd, jlong offset) { 4926 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4927} 4928 4929// Map a block of memory. 4930char* os::map_memory(int fd, const char* file_name, size_t file_offset, 4931 char *addr, size_t bytes, bool read_only, 4932 bool allow_exec) { 4933 int prot; 4934 int flags; 4935 4936 if (read_only) { 4937 prot = PROT_READ; 4938 flags = MAP_SHARED; 4939 } else { 4940 prot = PROT_READ | PROT_WRITE; 4941 flags = MAP_PRIVATE; 4942 } 4943 4944 if (allow_exec) { 4945 prot |= PROT_EXEC; 4946 } 4947 4948 if (addr != NULL) { 4949 flags |= MAP_FIXED; 4950 } 4951 4952 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 4953 fd, file_offset); 4954 if (mapped_address == MAP_FAILED) { 4955 return NULL; 4956 } 4957 return mapped_address; 4958} 4959 4960 4961// Remap a block of memory. 4962char* os::remap_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 // same as map_memory() on this OS 4966 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 4967 allow_exec); 4968} 4969 4970 4971// Unmap a block of memory. 4972bool os::unmap_memory(char* addr, size_t bytes) { 4973 return munmap(addr, bytes) == 0; 4974} 4975 4976void os::pause() { 4977 char filename[MAX_PATH]; 4978 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 4979 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 4980 } else { 4981 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 4982 } 4983 4984 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 4985 if (fd != -1) { 4986 struct stat buf; 4987 close(fd); 4988 while (::stat(filename, &buf) == 0) { 4989 (void)::poll(NULL, 0, 100); 4990 } 4991 } else { 4992 jio_fprintf(stderr, 4993 "Could not open pause file '%s', continuing immediately.\n", filename); 4994 } 4995} 4996 4997#ifndef PRODUCT 4998#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 4999// Turn this on if you need to trace synch operations. 5000// Set RECORD_SYNCH_LIMIT to a large-enough value, 5001// and call record_synch_enable and record_synch_disable 5002// around the computation of interest. 5003 5004void record_synch(char* name, bool returning); // defined below 5005 5006class RecordSynch { 5007 char* _name; 5008 public: 5009 RecordSynch(char* name) :_name(name) 5010 { record_synch(_name, false); } 5011 ~RecordSynch() { record_synch(_name, true); } 5012}; 5013 5014#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5015extern "C" ret name params { \ 5016 typedef ret name##_t params; \ 5017 static name##_t* implem = NULL; \ 5018 static int callcount = 0; \ 5019 if (implem == NULL) { \ 5020 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5021 if (implem == NULL) fatal(dlerror()); \ 5022 } \ 5023 ++callcount; \ 5024 RecordSynch _rs(#name); \ 5025 inner; \ 5026 return implem args; \ 5027} 5028// in dbx, examine callcounts this way: 5029// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5030 5031#define CHECK_POINTER_OK(p) \ 5032 (Universe::perm_gen() == NULL || !Universe::is_reserved_heap((oop)(p))) 5033#define CHECK_MU \ 5034 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5035#define CHECK_CV \ 5036 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5037#define CHECK_P(p) \ 5038 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5039 5040#define CHECK_MUTEX(mutex_op) \ 5041CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5042 5043CHECK_MUTEX( mutex_lock) 5044CHECK_MUTEX( _mutex_lock) 5045CHECK_MUTEX( mutex_unlock) 5046CHECK_MUTEX(_mutex_unlock) 5047CHECK_MUTEX( mutex_trylock) 5048CHECK_MUTEX(_mutex_trylock) 5049 5050#define CHECK_COND(cond_op) \ 5051CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU;CHECK_CV); 5052 5053CHECK_COND( cond_wait); 5054CHECK_COND(_cond_wait); 5055CHECK_COND(_cond_wait_cancel); 5056 5057#define CHECK_COND2(cond_op) \ 5058CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU;CHECK_CV); 5059 5060CHECK_COND2( cond_timedwait); 5061CHECK_COND2(_cond_timedwait); 5062CHECK_COND2(_cond_timedwait_cancel); 5063 5064// do the _lwp_* versions too 5065#define mutex_t lwp_mutex_t 5066#define cond_t lwp_cond_t 5067CHECK_MUTEX( _lwp_mutex_lock) 5068CHECK_MUTEX( _lwp_mutex_unlock) 5069CHECK_MUTEX( _lwp_mutex_trylock) 5070CHECK_MUTEX( __lwp_mutex_lock) 5071CHECK_MUTEX( __lwp_mutex_unlock) 5072CHECK_MUTEX( __lwp_mutex_trylock) 5073CHECK_MUTEX(___lwp_mutex_lock) 5074CHECK_MUTEX(___lwp_mutex_unlock) 5075 5076CHECK_COND( _lwp_cond_wait); 5077CHECK_COND( __lwp_cond_wait); 5078CHECK_COND(___lwp_cond_wait); 5079 5080CHECK_COND2( _lwp_cond_timedwait); 5081CHECK_COND2( __lwp_cond_timedwait); 5082#undef mutex_t 5083#undef cond_t 5084 5085CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5086CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5087CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5088CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5089CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5090CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5091CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5092CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5093 5094 5095// recording machinery: 5096 5097enum { RECORD_SYNCH_LIMIT = 200 }; 5098char* record_synch_name[RECORD_SYNCH_LIMIT]; 5099void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5100bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5101thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5102int record_synch_count = 0; 5103bool record_synch_enabled = false; 5104 5105// in dbx, examine recorded data this way: 5106// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5107 5108void record_synch(char* name, bool returning) { 5109 if (record_synch_enabled) { 5110 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5111 record_synch_name[record_synch_count] = name; 5112 record_synch_returning[record_synch_count] = returning; 5113 record_synch_thread[record_synch_count] = thr_self(); 5114 record_synch_arg0ptr[record_synch_count] = &name; 5115 record_synch_count++; 5116 } 5117 // put more checking code here: 5118 // ... 5119 } 5120} 5121 5122void record_synch_enable() { 5123 // start collecting trace data, if not already doing so 5124 if (!record_synch_enabled) record_synch_count = 0; 5125 record_synch_enabled = true; 5126} 5127 5128void record_synch_disable() { 5129 // stop collecting trace data 5130 record_synch_enabled = false; 5131} 5132 5133#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5134#endif // PRODUCT 5135 5136const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5137const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5138 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5139 5140 5141// JVMTI & JVM monitoring and management support 5142// The thread_cpu_time() and current_thread_cpu_time() are only 5143// supported if is_thread_cpu_time_supported() returns true. 5144// They are not supported on Solaris T1. 5145 5146// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5147// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5148// of a thread. 5149// 5150// current_thread_cpu_time() and thread_cpu_time(Thread *) 5151// returns the fast estimate available on the platform. 5152 5153// hrtime_t gethrvtime() return value includes 5154// user time but does not include system time 5155jlong os::current_thread_cpu_time() { 5156 return (jlong) gethrvtime(); 5157} 5158 5159jlong os::thread_cpu_time(Thread *thread) { 5160 // return user level CPU time only to be consistent with 5161 // what current_thread_cpu_time returns. 5162 // thread_cpu_time_info() must be changed if this changes 5163 return os::thread_cpu_time(thread, false /* user time only */); 5164} 5165 5166jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5167 if (user_sys_cpu_time) { 5168 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5169 } else { 5170 return os::current_thread_cpu_time(); 5171 } 5172} 5173 5174jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5175 char proc_name[64]; 5176 int count; 5177 prusage_t prusage; 5178 jlong lwp_time; 5179 int fd; 5180 5181 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5182 getpid(), 5183 thread->osthread()->lwp_id()); 5184 fd = open(proc_name, O_RDONLY); 5185 if ( fd == -1 ) return -1; 5186 5187 do { 5188 count = pread(fd, 5189 (void *)&prusage.pr_utime, 5190 thr_time_size, 5191 thr_time_off); 5192 } while (count < 0 && errno == EINTR); 5193 close(fd); 5194 if ( count < 0 ) return -1; 5195 5196 if (user_sys_cpu_time) { 5197 // user + system CPU time 5198 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5199 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5200 (jlong)prusage.pr_stime.tv_nsec + 5201 (jlong)prusage.pr_utime.tv_nsec; 5202 } else { 5203 // user level CPU time only 5204 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5205 (jlong)prusage.pr_utime.tv_nsec; 5206 } 5207 5208 return(lwp_time); 5209} 5210 5211void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5212 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5213 info_ptr->may_skip_backward = false; // elapsed time not wall time 5214 info_ptr->may_skip_forward = false; // elapsed time not wall time 5215 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5216} 5217 5218void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5219 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5220 info_ptr->may_skip_backward = false; // elapsed time not wall time 5221 info_ptr->may_skip_forward = false; // elapsed time not wall time 5222 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5223} 5224 5225bool os::is_thread_cpu_time_supported() { 5226 if ( os::Solaris::T2_libthread() || UseBoundThreads ) { 5227 return true; 5228 } else { 5229 return false; 5230 } 5231} 5232 5233// System loadavg support. Returns -1 if load average cannot be obtained. 5234// Return the load average for our processor set if the primitive exists 5235// (Solaris 9 and later). Otherwise just return system wide loadavg. 5236int os::loadavg(double loadavg[], int nelem) { 5237 if (pset_getloadavg_ptr != NULL) { 5238 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5239 } else { 5240 return ::getloadavg(loadavg, nelem); 5241 } 5242} 5243 5244//--------------------------------------------------------------------------------- 5245#ifndef PRODUCT 5246 5247static address same_page(address x, address y) { 5248 intptr_t page_bits = -os::vm_page_size(); 5249 if ((intptr_t(x) & page_bits) == (intptr_t(y) & page_bits)) 5250 return x; 5251 else if (x > y) 5252 return (address)(intptr_t(y) | ~page_bits) + 1; 5253 else 5254 return (address)(intptr_t(y) & page_bits); 5255} 5256 5257bool os::find(address addr) { 5258 Dl_info dlinfo; 5259 memset(&dlinfo, 0, sizeof(dlinfo)); 5260 if (dladdr(addr, &dlinfo)) { 5261#ifdef _LP64 5262 tty->print("0x%016lx: ", addr); 5263#else 5264 tty->print("0x%08x: ", addr); 5265#endif 5266 if (dlinfo.dli_sname != NULL) 5267 tty->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5268 else if (dlinfo.dli_fname) 5269 tty->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5270 else 5271 tty->print("<absolute address>"); 5272 if (dlinfo.dli_fname) tty->print(" in %s", dlinfo.dli_fname); 5273#ifdef _LP64 5274 if (dlinfo.dli_fbase) tty->print(" at 0x%016lx", dlinfo.dli_fbase); 5275#else 5276 if (dlinfo.dli_fbase) tty->print(" at 0x%08x", dlinfo.dli_fbase); 5277#endif 5278 tty->cr(); 5279 5280 if (Verbose) { 5281 // decode some bytes around the PC 5282 address begin = same_page(addr-40, addr); 5283 address end = same_page(addr+40, addr); 5284 address lowest = (address) dlinfo.dli_sname; 5285 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5286 if (begin < lowest) begin = lowest; 5287 Dl_info dlinfo2; 5288 if (dladdr(end, &dlinfo2) && dlinfo2.dli_saddr != dlinfo.dli_saddr 5289 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) 5290 end = (address) dlinfo2.dli_saddr; 5291 Disassembler::decode(begin, end); 5292 } 5293 return true; 5294 } 5295 return false; 5296} 5297 5298#endif 5299 5300 5301// Following function has been added to support HotSparc's libjvm.so running 5302// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5303// src/solaris/hpi/native_threads in the EVM codebase. 5304// 5305// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5306// libraries and should thus be removed. We will leave it behind for a while 5307// until we no longer want to able to run on top of 1.3.0 Solaris production 5308// JDK. See 4341971. 5309 5310#define STACK_SLACK 0x800 5311 5312extern "C" { 5313 intptr_t sysThreadAvailableStackWithSlack() { 5314 stack_t st; 5315 intptr_t retval, stack_top; 5316 retval = thr_stksegment(&st); 5317 assert(retval == 0, "incorrect return value from thr_stksegment"); 5318 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5319 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5320 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5321 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5322 } 5323} 5324 5325// Just to get the Kernel build to link on solaris for testing. 5326 5327extern "C" { 5328class ASGCT_CallTrace; 5329void AsyncGetCallTrace(ASGCT_CallTrace *trace, jint depth, void* ucontext) 5330 KERNEL_RETURN; 5331} 5332 5333 5334// ObjectMonitor park-unpark infrastructure ... 5335// 5336// We implement Solaris and Linux PlatformEvents with the 5337// obvious condvar-mutex-flag triple. 5338// Another alternative that works quite well is pipes: 5339// Each PlatformEvent consists of a pipe-pair. 5340// The thread associated with the PlatformEvent 5341// calls park(), which reads from the input end of the pipe. 5342// Unpark() writes into the other end of the pipe. 5343// The write-side of the pipe must be set NDELAY. 5344// Unfortunately pipes consume a large # of handles. 5345// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5346// Using pipes for the 1st few threads might be workable, however. 5347// 5348// park() is permitted to return spuriously. 5349// Callers of park() should wrap the call to park() in 5350// an appropriate loop. A litmus test for the correct 5351// usage of park is the following: if park() were modified 5352// to immediately return 0 your code should still work, 5353// albeit degenerating to a spin loop. 5354// 5355// An interesting optimization for park() is to use a trylock() 5356// to attempt to acquire the mutex. If the trylock() fails 5357// then we know that a concurrent unpark() operation is in-progress. 5358// in that case the park() code could simply set _count to 0 5359// and return immediately. The subsequent park() operation *might* 5360// return immediately. That's harmless as the caller of park() is 5361// expected to loop. By using trylock() we will have avoided a 5362// avoided a context switch caused by contention on the per-thread mutex. 5363// 5364// TODO-FIXME: 5365// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5366// objectmonitor implementation. 5367// 2. Collapse the JSR166 parker event, and the 5368// objectmonitor ParkEvent into a single "Event" construct. 5369// 3. In park() and unpark() add: 5370// assert (Thread::current() == AssociatedWith). 5371// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5372// 1-out-of-N park() operations will return immediately. 5373// 5374// _Event transitions in park() 5375// -1 => -1 : illegal 5376// 1 => 0 : pass - return immediately 5377// 0 => -1 : block 5378// 5379// _Event serves as a restricted-range semaphore. 5380// 5381// Another possible encoding of _Event would be with 5382// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5383// 5384// TODO-FIXME: add DTRACE probes for: 5385// 1. Tx parks 5386// 2. Ty unparks Tx 5387// 3. Tx resumes from park 5388 5389 5390// value determined through experimentation 5391#define ROUNDINGFIX 11 5392 5393// utility to compute the abstime argument to timedwait. 5394// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5395 5396static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5397 // millis is the relative timeout time 5398 // abstime will be the absolute timeout time 5399 if (millis < 0) millis = 0; 5400 struct timeval now; 5401 int status = gettimeofday(&now, NULL); 5402 assert(status == 0, "gettimeofday"); 5403 jlong seconds = millis / 1000; 5404 jlong max_wait_period; 5405 5406 if (UseLWPSynchronization) { 5407 // forward port of fix for 4275818 (not sleeping long enough) 5408 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5409 // _lwp_cond_timedwait() used a round_down algorithm rather 5410 // than a round_up. For millis less than our roundfactor 5411 // it rounded down to 0 which doesn't meet the spec. 5412 // For millis > roundfactor we may return a bit sooner, but 5413 // since we can not accurately identify the patch level and 5414 // this has already been fixed in Solaris 9 and 8 we will 5415 // leave it alone rather than always rounding down. 5416 5417 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5418 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5419 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5420 max_wait_period = 21000000; 5421 } else { 5422 max_wait_period = 50000000; 5423 } 5424 millis %= 1000; 5425 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5426 seconds = max_wait_period; 5427 } 5428 abstime->tv_sec = now.tv_sec + seconds; 5429 long usec = now.tv_usec + millis * 1000; 5430 if (usec >= 1000000) { 5431 abstime->tv_sec += 1; 5432 usec -= 1000000; 5433 } 5434 abstime->tv_nsec = usec * 1000; 5435 return abstime; 5436} 5437 5438// Test-and-clear _Event, always leaves _Event set to 0, returns immediately. 5439// Conceptually TryPark() should be equivalent to park(0). 5440 5441int os::PlatformEvent::TryPark() { 5442 for (;;) { 5443 const int v = _Event ; 5444 guarantee ((v == 0) || (v == 1), "invariant") ; 5445 if (Atomic::cmpxchg (0, &_Event, v) == v) return v ; 5446 } 5447} 5448 5449void os::PlatformEvent::park() { // AKA: down() 5450 // Invariant: Only the thread associated with the Event/PlatformEvent 5451 // may call park(). 5452 int v ; 5453 for (;;) { 5454 v = _Event ; 5455 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5456 } 5457 guarantee (v >= 0, "invariant") ; 5458 if (v == 0) { 5459 // Do this the hard way by blocking ... 5460 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5461 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5462 // Only for SPARC >= V8PlusA 5463#if defined(__sparc) && defined(COMPILER2) 5464 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5465#endif 5466 int status = os::Solaris::mutex_lock(_mutex); 5467 assert_status(status == 0, status, "mutex_lock"); 5468 guarantee (_nParked == 0, "invariant") ; 5469 ++ _nParked ; 5470 while (_Event < 0) { 5471 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5472 // Treat this the same as if the wait was interrupted 5473 // With usr/lib/lwp going to kernel, always handle ETIME 5474 status = os::Solaris::cond_wait(_cond, _mutex); 5475 if (status == ETIME) status = EINTR ; 5476 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5477 } 5478 -- _nParked ; 5479 _Event = 0 ; 5480 status = os::Solaris::mutex_unlock(_mutex); 5481 assert_status(status == 0, status, "mutex_unlock"); 5482 } 5483} 5484 5485int os::PlatformEvent::park(jlong millis) { 5486 guarantee (_nParked == 0, "invariant") ; 5487 int v ; 5488 for (;;) { 5489 v = _Event ; 5490 if (Atomic::cmpxchg (v-1, &_Event, v) == v) break ; 5491 } 5492 guarantee (v >= 0, "invariant") ; 5493 if (v != 0) return OS_OK ; 5494 5495 int ret = OS_TIMEOUT; 5496 timestruc_t abst; 5497 compute_abstime (&abst, millis); 5498 5499 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5500 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5501 // Only for SPARC >= V8PlusA 5502#if defined(__sparc) && defined(COMPILER2) 5503 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5504#endif 5505 int status = os::Solaris::mutex_lock(_mutex); 5506 assert_status(status == 0, status, "mutex_lock"); 5507 guarantee (_nParked == 0, "invariant") ; 5508 ++ _nParked ; 5509 while (_Event < 0) { 5510 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5511 assert_status(status == 0 || status == EINTR || 5512 status == ETIME || status == ETIMEDOUT, 5513 status, "cond_timedwait"); 5514 if (!FilterSpuriousWakeups) break ; // previous semantics 5515 if (status == ETIME || status == ETIMEDOUT) break ; 5516 // We consume and ignore EINTR and spurious wakeups. 5517 } 5518 -- _nParked ; 5519 if (_Event >= 0) ret = OS_OK ; 5520 _Event = 0 ; 5521 status = os::Solaris::mutex_unlock(_mutex); 5522 assert_status(status == 0, status, "mutex_unlock"); 5523 return ret; 5524} 5525 5526void os::PlatformEvent::unpark() { 5527 int v, AnyWaiters; 5528 5529 // Increment _Event. 5530 // Another acceptable implementation would be to simply swap 1 5531 // into _Event: 5532 // if (Swap (&_Event, 1) < 0) { 5533 // mutex_lock (_mutex) ; AnyWaiters = nParked; mutex_unlock (_mutex) ; 5534 // if (AnyWaiters) cond_signal (_cond) ; 5535 // } 5536 5537 for (;;) { 5538 v = _Event ; 5539 if (v > 0) { 5540 // The LD of _Event could have reordered or be satisfied 5541 // by a read-aside from this processor's write buffer. 5542 // To avoid problems execute a barrier and then 5543 // ratify the value. A degenerate CAS() would also work. 5544 // Viz., CAS (v+0, &_Event, v) == v). 5545 OrderAccess::fence() ; 5546 if (_Event == v) return ; 5547 continue ; 5548 } 5549 if (Atomic::cmpxchg (v+1, &_Event, v) == v) break ; 5550 } 5551 5552 // If the thread associated with the event was parked, wake it. 5553 if (v < 0) { 5554 int status ; 5555 // Wait for the thread assoc with the PlatformEvent to vacate. 5556 status = os::Solaris::mutex_lock(_mutex); 5557 assert_status(status == 0, status, "mutex_lock"); 5558 AnyWaiters = _nParked ; 5559 status = os::Solaris::mutex_unlock(_mutex); 5560 assert_status(status == 0, status, "mutex_unlock"); 5561 guarantee (AnyWaiters == 0 || AnyWaiters == 1, "invariant") ; 5562 if (AnyWaiters != 0) { 5563 // We intentional signal *after* dropping the lock 5564 // to avoid a common class of futile wakeups. 5565 status = os::Solaris::cond_signal(_cond); 5566 assert_status(status == 0, status, "cond_signal"); 5567 } 5568 } 5569} 5570 5571// JSR166 5572// ------------------------------------------------------- 5573 5574/* 5575 * The solaris and linux implementations of park/unpark are fairly 5576 * conservative for now, but can be improved. They currently use a 5577 * mutex/condvar pair, plus _counter. 5578 * Park decrements _counter if > 0, else does a condvar wait. Unpark 5579 * sets count to 1 and signals condvar. Only one thread ever waits 5580 * on the condvar. Contention seen when trying to park implies that someone 5581 * is unparking you, so don't wait. And spurious returns are fine, so there 5582 * is no need to track notifications. 5583 */ 5584 5585#define NANOSECS_PER_SEC 1000000000 5586#define NANOSECS_PER_MILLISEC 1000000 5587#define MAX_SECS 100000000 5588 5589/* 5590 * This code is common to linux and solaris and will be moved to a 5591 * common place in dolphin. 5592 * 5593 * The passed in time value is either a relative time in nanoseconds 5594 * or an absolute time in milliseconds. Either way it has to be unpacked 5595 * into suitable seconds and nanoseconds components and stored in the 5596 * given timespec structure. 5597 * Given time is a 64-bit value and the time_t used in the timespec is only 5598 * a signed-32-bit value (except on 64-bit Linux) we have to watch for 5599 * overflow if times way in the future are given. Further on Solaris versions 5600 * prior to 10 there is a restriction (see cond_timedwait) that the specified 5601 * number of seconds, in abstime, is less than current_time + 100,000,000. 5602 * As it will be 28 years before "now + 100000000" will overflow we can 5603 * ignore overflow and just impose a hard-limit on seconds using the value 5604 * of "now + 100,000,000". This places a limit on the timeout of about 3.17 5605 * years from "now". 5606 */ 5607static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5608 assert (time > 0, "convertTime"); 5609 5610 struct timeval now; 5611 int status = gettimeofday(&now, NULL); 5612 assert(status == 0, "gettimeofday"); 5613 5614 time_t max_secs = now.tv_sec + MAX_SECS; 5615 5616 if (isAbsolute) { 5617 jlong secs = time / 1000; 5618 if (secs > max_secs) { 5619 absTime->tv_sec = max_secs; 5620 } 5621 else { 5622 absTime->tv_sec = secs; 5623 } 5624 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5625 } 5626 else { 5627 jlong secs = time / NANOSECS_PER_SEC; 5628 if (secs >= MAX_SECS) { 5629 absTime->tv_sec = max_secs; 5630 absTime->tv_nsec = 0; 5631 } 5632 else { 5633 absTime->tv_sec = now.tv_sec + secs; 5634 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5635 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5636 absTime->tv_nsec -= NANOSECS_PER_SEC; 5637 ++absTime->tv_sec; // note: this must be <= max_secs 5638 } 5639 } 5640 } 5641 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5642 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5643 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5644 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5645} 5646 5647void Parker::park(bool isAbsolute, jlong time) { 5648 5649 // Optional fast-path check: 5650 // Return immediately if a permit is available. 5651 if (_counter > 0) { 5652 _counter = 0 ; 5653 return ; 5654 } 5655 5656 // Optional fast-exit: Check interrupt before trying to wait 5657 Thread* thread = Thread::current(); 5658 assert(thread->is_Java_thread(), "Must be JavaThread"); 5659 JavaThread *jt = (JavaThread *)thread; 5660 if (Thread::is_interrupted(thread, false)) { 5661 return; 5662 } 5663 5664 // First, demultiplex/decode time arguments 5665 timespec absTime; 5666 if (time < 0) { // don't wait at all 5667 return; 5668 } 5669 if (time > 0) { 5670 // Warning: this code might be exposed to the old Solaris time 5671 // round-down bugs. Grep "roundingFix" for details. 5672 unpackTime(&absTime, isAbsolute, time); 5673 } 5674 5675 // Enter safepoint region 5676 // Beware of deadlocks such as 6317397. 5677 // The per-thread Parker:: _mutex is a classic leaf-lock. 5678 // In particular a thread must never block on the Threads_lock while 5679 // holding the Parker:: mutex. If safepoints are pending both the 5680 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5681 ThreadBlockInVM tbivm(jt); 5682 5683 // Don't wait if cannot get lock since interference arises from 5684 // unblocking. Also. check interrupt before trying wait 5685 if (Thread::is_interrupted(thread, false) || 5686 os::Solaris::mutex_trylock(_mutex) != 0) { 5687 return; 5688 } 5689 5690 int status ; 5691 5692 if (_counter > 0) { // no wait needed 5693 _counter = 0; 5694 status = os::Solaris::mutex_unlock(_mutex); 5695 assert (status == 0, "invariant") ; 5696 return; 5697 } 5698 5699#ifdef ASSERT 5700 // Don't catch signals while blocked; let the running threads have the signals. 5701 // (This allows a debugger to break into the running thread.) 5702 sigset_t oldsigs; 5703 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5704 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5705#endif 5706 5707 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5708 jt->set_suspend_equivalent(); 5709 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5710 5711 // Do this the hard way by blocking ... 5712 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5713 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5714 // Only for SPARC >= V8PlusA 5715#if defined(__sparc) && defined(COMPILER2) 5716 if (ClearFPUAtPark) { _mark_fpu_nosave() ; } 5717#endif 5718 5719 if (time == 0) { 5720 status = os::Solaris::cond_wait (_cond, _mutex) ; 5721 } else { 5722 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5723 } 5724 // Note that an untimed cond_wait() can sometimes return ETIME on older 5725 // versions of the Solaris. 5726 assert_status(status == 0 || status == EINTR || 5727 status == ETIME || status == ETIMEDOUT, 5728 status, "cond_timedwait"); 5729 5730#ifdef ASSERT 5731 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5732#endif 5733 _counter = 0 ; 5734 status = os::Solaris::mutex_unlock(_mutex); 5735 assert_status(status == 0, status, "mutex_unlock") ; 5736 5737 // If externally suspended while waiting, re-suspend 5738 if (jt->handle_special_suspend_equivalent_condition()) { 5739 jt->java_suspend_self(); 5740 } 5741 5742} 5743 5744void Parker::unpark() { 5745 int s, status ; 5746 status = os::Solaris::mutex_lock (_mutex) ; 5747 assert (status == 0, "invariant") ; 5748 s = _counter; 5749 _counter = 1; 5750 status = os::Solaris::mutex_unlock (_mutex) ; 5751 assert (status == 0, "invariant") ; 5752 5753 if (s < 1) { 5754 status = os::Solaris::cond_signal (_cond) ; 5755 assert (status == 0, "invariant") ; 5756 } 5757} 5758 5759extern char** environ; 5760 5761// Run the specified command in a separate process. Return its exit value, 5762// or -1 on failure (e.g. can't fork a new process). 5763// Unlike system(), this function can be called from signal handler. It 5764// doesn't block SIGINT et al. 5765int os::fork_and_exec(char* cmd) { 5766 char * argv[4]; 5767 argv[0] = (char *)"sh"; 5768 argv[1] = (char *)"-c"; 5769 argv[2] = cmd; 5770 argv[3] = NULL; 5771 5772 // fork is async-safe, fork1 is not so can't use in signal handler 5773 pid_t pid; 5774 Thread* t = ThreadLocalStorage::get_thread_slow(); 5775 if (t != NULL && t->is_inside_signal_handler()) { 5776 pid = fork(); 5777 } else { 5778 pid = fork1(); 5779 } 5780 5781 if (pid < 0) { 5782 // fork failed 5783 warning("fork failed: %s", strerror(errno)); 5784 return -1; 5785 5786 } else if (pid == 0) { 5787 // child process 5788 5789 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5790 execve("/usr/bin/sh", argv, environ); 5791 5792 // execve failed 5793 _exit(-1); 5794 5795 } else { 5796 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5797 // care about the actual exit code, for now. 5798 5799 int status; 5800 5801 // Wait for the child process to exit. This returns immediately if 5802 // the child has already exited. */ 5803 while (waitpid(pid, &status, 0) < 0) { 5804 switch (errno) { 5805 case ECHILD: return 0; 5806 case EINTR: break; 5807 default: return -1; 5808 } 5809 } 5810 5811 if (WIFEXITED(status)) { 5812 // The child exited normally; get its exit code. 5813 return WEXITSTATUS(status); 5814 } else if (WIFSIGNALED(status)) { 5815 // The child exited because of a signal 5816 // The best value to return is 0x80 + signal number, 5817 // because that is what all Unix shells do, and because 5818 // it allows callers to distinguish between process exit and 5819 // process death by signal. 5820 return 0x80 + WTERMSIG(status); 5821 } else { 5822 // Unknown exit code; pass it through 5823 return status; 5824 } 5825 } 5826} 5827