os_solaris.cpp revision 7371:f18a1b5cbf0b
1/* 2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25// no precompiled headers 26#include "classfile/classLoader.hpp" 27#include "classfile/systemDictionary.hpp" 28#include "classfile/vmSymbols.hpp" 29#include "code/icBuffer.hpp" 30#include "code/vtableStubs.hpp" 31#include "compiler/compileBroker.hpp" 32#include "compiler/disassembler.hpp" 33#include "interpreter/interpreter.hpp" 34#include "jvm_solaris.h" 35#include "memory/allocation.inline.hpp" 36#include "memory/filemap.hpp" 37#include "mutex_solaris.inline.hpp" 38#include "oops/oop.inline.hpp" 39#include "os_share_solaris.hpp" 40#include "os_solaris.inline.hpp" 41#include "prims/jniFastGetField.hpp" 42#include "prims/jvm.h" 43#include "prims/jvm_misc.hpp" 44#include "runtime/arguments.hpp" 45#include "runtime/atomic.inline.hpp" 46#include "runtime/extendedPC.hpp" 47#include "runtime/globals.hpp" 48#include "runtime/interfaceSupport.hpp" 49#include "runtime/java.hpp" 50#include "runtime/javaCalls.hpp" 51#include "runtime/mutexLocker.hpp" 52#include "runtime/objectMonitor.hpp" 53#include "runtime/orderAccess.inline.hpp" 54#include "runtime/osThread.hpp" 55#include "runtime/perfMemory.hpp" 56#include "runtime/sharedRuntime.hpp" 57#include "runtime/statSampler.hpp" 58#include "runtime/stubRoutines.hpp" 59#include "runtime/thread.inline.hpp" 60#include "runtime/threadCritical.hpp" 61#include "runtime/timer.hpp" 62#include "runtime/vm_version.hpp" 63#include "services/attachListener.hpp" 64#include "services/memTracker.hpp" 65#include "services/runtimeService.hpp" 66#include "utilities/decoder.hpp" 67#include "utilities/defaultStream.hpp" 68#include "utilities/events.hpp" 69#include "utilities/growableArray.hpp" 70#include "utilities/vmError.hpp" 71 72// put OS-includes here 73# include <dlfcn.h> 74# include <errno.h> 75# include <exception> 76# include <link.h> 77# include <poll.h> 78# include <pthread.h> 79# include <pwd.h> 80# include <schedctl.h> 81# include <setjmp.h> 82# include <signal.h> 83# include <stdio.h> 84# include <alloca.h> 85# include <sys/filio.h> 86# include <sys/ipc.h> 87# include <sys/lwp.h> 88# include <sys/machelf.h> // for elf Sym structure used by dladdr1 89# include <sys/mman.h> 90# include <sys/processor.h> 91# include <sys/procset.h> 92# include <sys/pset.h> 93# include <sys/resource.h> 94# include <sys/shm.h> 95# include <sys/socket.h> 96# include <sys/stat.h> 97# include <sys/systeminfo.h> 98# include <sys/time.h> 99# include <sys/times.h> 100# include <sys/types.h> 101# include <sys/wait.h> 102# include <sys/utsname.h> 103# include <thread.h> 104# include <unistd.h> 105# include <sys/priocntl.h> 106# include <sys/rtpriocntl.h> 107# include <sys/tspriocntl.h> 108# include <sys/iapriocntl.h> 109# include <sys/fxpriocntl.h> 110# include <sys/loadavg.h> 111# include <string.h> 112# include <stdio.h> 113 114# define _STRUCTURED_PROC 1 // this gets us the new structured proc interfaces of 5.6 & later 115# include <sys/procfs.h> // see comment in <sys/procfs.h> 116 117#define MAX_PATH (2 * K) 118 119// for timer info max values which include all bits 120#define ALL_64_BITS CONST64(0xFFFFFFFFFFFFFFFF) 121 122 123// Here are some liblgrp types from sys/lgrp_user.h to be able to 124// compile on older systems without this header file. 125 126#ifndef MADV_ACCESS_LWP 127 #define MADV_ACCESS_LWP 7 /* next LWP to access heavily */ 128#endif 129#ifndef MADV_ACCESS_MANY 130 #define MADV_ACCESS_MANY 8 /* many processes to access heavily */ 131#endif 132 133#ifndef LGRP_RSRC_CPU 134 #define LGRP_RSRC_CPU 0 /* CPU resources */ 135#endif 136#ifndef LGRP_RSRC_MEM 137 #define LGRP_RSRC_MEM 1 /* memory resources */ 138#endif 139 140// see thr_setprio(3T) for the basis of these numbers 141#define MinimumPriority 0 142#define NormalPriority 64 143#define MaximumPriority 127 144 145// Values for ThreadPriorityPolicy == 1 146int prio_policy1[CriticalPriority+1] = { 147 -99999, 0, 16, 32, 48, 64, 148 80, 96, 112, 124, 127, 127 }; 149 150// System parameters used internally 151static clock_t clock_tics_per_sec = 100; 152 153// Track if we have called enable_extended_FILE_stdio (on Solaris 10u4+) 154static bool enabled_extended_FILE_stdio = false; 155 156// For diagnostics to print a message once. see run_periodic_checks 157static bool check_addr0_done = false; 158static sigset_t check_signal_done; 159static bool check_signals = true; 160 161address os::Solaris::handler_start; // start pc of thr_sighndlrinfo 162address os::Solaris::handler_end; // end pc of thr_sighndlrinfo 163 164address os::Solaris::_main_stack_base = NULL; // 4352906 workaround 165 166 167// "default" initializers for missing libc APIs 168extern "C" { 169 static int lwp_mutex_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 170 static int lwp_mutex_destroy(mutex_t *mx) { return 0; } 171 172 static int lwp_cond_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 173 static int lwp_cond_destroy(cond_t *cv) { return 0; } 174} 175 176// "default" initializers for pthread-based synchronization 177extern "C" { 178 static int pthread_mutex_default_init(mutex_t *mx, int scope, void *arg) { memset(mx, 0, sizeof(mutex_t)); return 0; } 179 static int pthread_cond_default_init(cond_t *cv, int scope, void *arg){ memset(cv, 0, sizeof(cond_t)); return 0; } 180} 181 182static void unpackTime(timespec* absTime, bool isAbsolute, jlong time); 183 184// Thread Local Storage 185// This is common to all Solaris platforms so it is defined here, 186// in this common file. 187// The declarations are in the os_cpu threadLS*.hpp files. 188// 189// Static member initialization for TLS 190Thread* ThreadLocalStorage::_get_thread_cache[ThreadLocalStorage::_pd_cache_size] = {NULL}; 191 192#ifndef PRODUCT 193 #define _PCT(n,d) ((100.0*(double)(n))/(double)(d)) 194 195int ThreadLocalStorage::_tcacheHit = 0; 196int ThreadLocalStorage::_tcacheMiss = 0; 197 198void ThreadLocalStorage::print_statistics() { 199 int total = _tcacheMiss+_tcacheHit; 200 tty->print_cr("Thread cache hits %d misses %d total %d percent %f\n", 201 _tcacheHit, _tcacheMiss, total, _PCT(_tcacheHit, total)); 202} 203 #undef _PCT 204#endif // PRODUCT 205 206Thread* ThreadLocalStorage::get_thread_via_cache_slowly(uintptr_t raw_id, 207 int index) { 208 Thread *thread = get_thread_slow(); 209 if (thread != NULL) { 210 address sp = os::current_stack_pointer(); 211 guarantee(thread->_stack_base == NULL || 212 (sp <= thread->_stack_base && 213 sp >= thread->_stack_base - thread->_stack_size) || 214 is_error_reported(), 215 "sp must be inside of selected thread stack"); 216 217 thread->set_self_raw_id(raw_id); // mark for quick retrieval 218 _get_thread_cache[index] = thread; 219 } 220 return thread; 221} 222 223 224static const double all_zero[sizeof(Thread) / sizeof(double) + 1] = {0}; 225#define NO_CACHED_THREAD ((Thread*)all_zero) 226 227void ThreadLocalStorage::pd_set_thread(Thread* thread) { 228 229 // Store the new value before updating the cache to prevent a race 230 // between get_thread_via_cache_slowly() and this store operation. 231 os::thread_local_storage_at_put(ThreadLocalStorage::thread_index(), thread); 232 233 // Update thread cache with new thread if setting on thread create, 234 // or NO_CACHED_THREAD (zeroed) thread if resetting thread on exit. 235 uintptr_t raw = pd_raw_thread_id(); 236 int ix = pd_cache_index(raw); 237 _get_thread_cache[ix] = thread == NULL ? NO_CACHED_THREAD : thread; 238} 239 240void ThreadLocalStorage::pd_init() { 241 for (int i = 0; i < _pd_cache_size; i++) { 242 _get_thread_cache[i] = NO_CACHED_THREAD; 243 } 244} 245 246// Invalidate all the caches (happens to be the same as pd_init). 247void ThreadLocalStorage::pd_invalidate_all() { pd_init(); } 248 249#undef NO_CACHED_THREAD 250 251// END Thread Local Storage 252 253static inline size_t adjust_stack_size(address base, size_t size) { 254 if ((ssize_t)size < 0) { 255 // 4759953: Compensate for ridiculous stack size. 256 size = max_intx; 257 } 258 if (size > (size_t)base) { 259 // 4812466: Make sure size doesn't allow the stack to wrap the address space. 260 size = (size_t)base; 261 } 262 return size; 263} 264 265static inline stack_t get_stack_info() { 266 stack_t st; 267 int retval = thr_stksegment(&st); 268 st.ss_size = adjust_stack_size((address)st.ss_sp, st.ss_size); 269 assert(retval == 0, "incorrect return value from thr_stksegment"); 270 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 271 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 272 return st; 273} 274 275address os::current_stack_base() { 276 int r = thr_main(); 277 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 278 bool is_primordial_thread = r; 279 280 // Workaround 4352906, avoid calls to thr_stksegment by 281 // thr_main after the first one (it looks like we trash 282 // some data, causing the value for ss_sp to be incorrect). 283 if (!is_primordial_thread || os::Solaris::_main_stack_base == NULL) { 284 stack_t st = get_stack_info(); 285 if (is_primordial_thread) { 286 // cache initial value of stack base 287 os::Solaris::_main_stack_base = (address)st.ss_sp; 288 } 289 return (address)st.ss_sp; 290 } else { 291 guarantee(os::Solaris::_main_stack_base != NULL, "Attempt to use null cached stack base"); 292 return os::Solaris::_main_stack_base; 293 } 294} 295 296size_t os::current_stack_size() { 297 size_t size; 298 299 int r = thr_main(); 300 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 301 if (!r) { 302 size = get_stack_info().ss_size; 303 } else { 304 struct rlimit limits; 305 getrlimit(RLIMIT_STACK, &limits); 306 size = adjust_stack_size(os::Solaris::_main_stack_base, (size_t)limits.rlim_cur); 307 } 308 // base may not be page aligned 309 address base = current_stack_base(); 310 address bottom = (address)align_size_up((intptr_t)(base - size), os::vm_page_size());; 311 return (size_t)(base - bottom); 312} 313 314struct tm* os::localtime_pd(const time_t* clock, struct tm* res) { 315 return localtime_r(clock, res); 316} 317 318void os::Solaris::try_enable_extended_io() { 319 typedef int (*enable_extended_FILE_stdio_t)(int, int); 320 321 if (!UseExtendedFileIO) { 322 return; 323 } 324 325 enable_extended_FILE_stdio_t enabler = 326 (enable_extended_FILE_stdio_t) dlsym(RTLD_DEFAULT, 327 "enable_extended_FILE_stdio"); 328 if (enabler) { 329 enabler(-1, -1); 330 } 331} 332 333static int _processors_online = 0; 334 335jint os::Solaris::_os_thread_limit = 0; 336volatile jint os::Solaris::_os_thread_count = 0; 337 338julong os::available_memory() { 339 return Solaris::available_memory(); 340} 341 342julong os::Solaris::available_memory() { 343 return (julong)sysconf(_SC_AVPHYS_PAGES) * os::vm_page_size(); 344} 345 346julong os::Solaris::_physical_memory = 0; 347 348julong os::physical_memory() { 349 return Solaris::physical_memory(); 350} 351 352static hrtime_t first_hrtime = 0; 353static const hrtime_t hrtime_hz = 1000*1000*1000; 354static volatile hrtime_t max_hrtime = 0; 355 356 357void os::Solaris::initialize_system_info() { 358 set_processor_count(sysconf(_SC_NPROCESSORS_CONF)); 359 _processors_online = sysconf(_SC_NPROCESSORS_ONLN); 360 _physical_memory = (julong)sysconf(_SC_PHYS_PAGES) * 361 (julong)sysconf(_SC_PAGESIZE); 362} 363 364int os::active_processor_count() { 365 int online_cpus = sysconf(_SC_NPROCESSORS_ONLN); 366 pid_t pid = getpid(); 367 psetid_t pset = PS_NONE; 368 // Are we running in a processor set or is there any processor set around? 369 if (pset_bind(PS_QUERY, P_PID, pid, &pset) == 0) { 370 uint_t pset_cpus; 371 // Query the number of cpus available to us. 372 if (pset_info(pset, NULL, &pset_cpus, NULL) == 0) { 373 assert(pset_cpus > 0 && pset_cpus <= online_cpus, "sanity check"); 374 _processors_online = pset_cpus; 375 return pset_cpus; 376 } 377 } 378 // Otherwise return number of online cpus 379 return online_cpus; 380} 381 382static bool find_processors_in_pset(psetid_t pset, 383 processorid_t** id_array, 384 uint_t* id_length) { 385 bool result = false; 386 // Find the number of processors in the processor set. 387 if (pset_info(pset, NULL, id_length, NULL) == 0) { 388 // Make up an array to hold their ids. 389 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 390 // Fill in the array with their processor ids. 391 if (pset_info(pset, NULL, id_length, *id_array) == 0) { 392 result = true; 393 } 394 } 395 return result; 396} 397 398// Callers of find_processors_online() must tolerate imprecise results -- 399// the system configuration can change asynchronously because of DR 400// or explicit psradm operations. 401// 402// We also need to take care that the loop (below) terminates as the 403// number of processors online can change between the _SC_NPROCESSORS_ONLN 404// request and the loop that builds the list of processor ids. Unfortunately 405// there's no reliable way to determine the maximum valid processor id, 406// so we use a manifest constant, MAX_PROCESSOR_ID, instead. See p_online 407// man pages, which claim the processor id set is "sparse, but 408// not too sparse". MAX_PROCESSOR_ID is used to ensure that we eventually 409// exit the loop. 410// 411// In the future we'll be able to use sysconf(_SC_CPUID_MAX), but that's 412// not available on S8.0. 413 414static bool find_processors_online(processorid_t** id_array, 415 uint* id_length) { 416 const processorid_t MAX_PROCESSOR_ID = 100000; 417 // Find the number of processors online. 418 *id_length = sysconf(_SC_NPROCESSORS_ONLN); 419 // Make up an array to hold their ids. 420 *id_array = NEW_C_HEAP_ARRAY(processorid_t, *id_length, mtInternal); 421 // Processors need not be numbered consecutively. 422 long found = 0; 423 processorid_t next = 0; 424 while (found < *id_length && next < MAX_PROCESSOR_ID) { 425 processor_info_t info; 426 if (processor_info(next, &info) == 0) { 427 // NB, PI_NOINTR processors are effectively online ... 428 if (info.pi_state == P_ONLINE || info.pi_state == P_NOINTR) { 429 (*id_array)[found] = next; 430 found += 1; 431 } 432 } 433 next += 1; 434 } 435 if (found < *id_length) { 436 // The loop above didn't identify the expected number of processors. 437 // We could always retry the operation, calling sysconf(_SC_NPROCESSORS_ONLN) 438 // and re-running the loop, above, but there's no guarantee of progress 439 // if the system configuration is in flux. Instead, we just return what 440 // we've got. Note that in the worst case find_processors_online() could 441 // return an empty set. (As a fall-back in the case of the empty set we 442 // could just return the ID of the current processor). 443 *id_length = found; 444 } 445 446 return true; 447} 448 449static bool assign_distribution(processorid_t* id_array, 450 uint id_length, 451 uint* distribution, 452 uint distribution_length) { 453 // We assume we can assign processorid_t's to uint's. 454 assert(sizeof(processorid_t) == sizeof(uint), 455 "can't convert processorid_t to uint"); 456 // Quick check to see if we won't succeed. 457 if (id_length < distribution_length) { 458 return false; 459 } 460 // Assign processor ids to the distribution. 461 // Try to shuffle processors to distribute work across boards, 462 // assuming 4 processors per board. 463 const uint processors_per_board = ProcessDistributionStride; 464 // Find the maximum processor id. 465 processorid_t max_id = 0; 466 for (uint m = 0; m < id_length; m += 1) { 467 max_id = MAX2(max_id, id_array[m]); 468 } 469 // The next id, to limit loops. 470 const processorid_t limit_id = max_id + 1; 471 // Make up markers for available processors. 472 bool* available_id = NEW_C_HEAP_ARRAY(bool, limit_id, mtInternal); 473 for (uint c = 0; c < limit_id; c += 1) { 474 available_id[c] = false; 475 } 476 for (uint a = 0; a < id_length; a += 1) { 477 available_id[id_array[a]] = true; 478 } 479 // Step by "boards", then by "slot", copying to "assigned". 480 // NEEDS_CLEANUP: The assignment of processors should be stateful, 481 // remembering which processors have been assigned by 482 // previous calls, etc., so as to distribute several 483 // independent calls of this method. What we'd like is 484 // It would be nice to have an API that let us ask 485 // how many processes are bound to a processor, 486 // but we don't have that, either. 487 // In the short term, "board" is static so that 488 // subsequent distributions don't all start at board 0. 489 static uint board = 0; 490 uint assigned = 0; 491 // Until we've found enough processors .... 492 while (assigned < distribution_length) { 493 // ... find the next available processor in the board. 494 for (uint slot = 0; slot < processors_per_board; slot += 1) { 495 uint try_id = board * processors_per_board + slot; 496 if ((try_id < limit_id) && (available_id[try_id] == true)) { 497 distribution[assigned] = try_id; 498 available_id[try_id] = false; 499 assigned += 1; 500 break; 501 } 502 } 503 board += 1; 504 if (board * processors_per_board + 0 >= limit_id) { 505 board = 0; 506 } 507 } 508 if (available_id != NULL) { 509 FREE_C_HEAP_ARRAY(bool, available_id, mtInternal); 510 } 511 return true; 512} 513 514void os::set_native_thread_name(const char *name) { 515 // Not yet implemented. 516 return; 517} 518 519bool os::distribute_processes(uint length, uint* distribution) { 520 bool result = false; 521 // Find the processor id's of all the available CPUs. 522 processorid_t* id_array = NULL; 523 uint id_length = 0; 524 // There are some races between querying information and using it, 525 // since processor sets can change dynamically. 526 psetid_t pset = PS_NONE; 527 // Are we running in a processor set? 528 if ((pset_bind(PS_QUERY, P_PID, P_MYID, &pset) == 0) && pset != PS_NONE) { 529 result = find_processors_in_pset(pset, &id_array, &id_length); 530 } else { 531 result = find_processors_online(&id_array, &id_length); 532 } 533 if (result == true) { 534 if (id_length >= length) { 535 result = assign_distribution(id_array, id_length, distribution, length); 536 } else { 537 result = false; 538 } 539 } 540 if (id_array != NULL) { 541 FREE_C_HEAP_ARRAY(processorid_t, id_array, mtInternal); 542 } 543 return result; 544} 545 546bool os::bind_to_processor(uint processor_id) { 547 // We assume that a processorid_t can be stored in a uint. 548 assert(sizeof(uint) == sizeof(processorid_t), 549 "can't convert uint to processorid_t"); 550 int bind_result = 551 processor_bind(P_LWPID, // bind LWP. 552 P_MYID, // bind current LWP. 553 (processorid_t) processor_id, // id. 554 NULL); // don't return old binding. 555 return (bind_result == 0); 556} 557 558bool os::getenv(const char* name, char* buffer, int len) { 559 char* val = ::getenv(name); 560 if (val == NULL || strlen(val) + 1 > len) { 561 if (len > 0) buffer[0] = 0; // return a null string 562 return false; 563 } 564 strcpy(buffer, val); 565 return true; 566} 567 568 569// Return true if user is running as root. 570 571bool os::have_special_privileges() { 572 static bool init = false; 573 static bool privileges = false; 574 if (!init) { 575 privileges = (getuid() != geteuid()) || (getgid() != getegid()); 576 init = true; 577 } 578 return privileges; 579} 580 581 582void os::init_system_properties_values() { 583 // The next steps are taken in the product version: 584 // 585 // Obtain the JAVA_HOME value from the location of libjvm.so. 586 // This library should be located at: 587 // <JAVA_HOME>/jre/lib/<arch>/{client|server}/libjvm.so. 588 // 589 // If "/jre/lib/" appears at the right place in the path, then we 590 // assume libjvm.so is installed in a JDK and we use this path. 591 // 592 // Otherwise exit with message: "Could not create the Java virtual machine." 593 // 594 // The following extra steps are taken in the debugging version: 595 // 596 // If "/jre/lib/" does NOT appear at the right place in the path 597 // instead of exit check for $JAVA_HOME environment variable. 598 // 599 // If it is defined and we are able to locate $JAVA_HOME/jre/lib/<arch>, 600 // then we append a fake suffix "hotspot/libjvm.so" to this path so 601 // it looks like libjvm.so is installed there 602 // <JAVA_HOME>/jre/lib/<arch>/hotspot/libjvm.so. 603 // 604 // Otherwise exit. 605 // 606 // Important note: if the location of libjvm.so changes this 607 // code needs to be changed accordingly. 608 609// Base path of extensions installed on the system. 610#define SYS_EXT_DIR "/usr/jdk/packages" 611#define EXTENSIONS_DIR "/lib/ext" 612#define ENDORSED_DIR "/lib/endorsed" 613 614 char cpu_arch[12]; 615 // Buffer that fits several sprintfs. 616 // Note that the space for the colon and the trailing null are provided 617 // by the nulls included by the sizeof operator. 618 const size_t bufsize = 619 MAX4((size_t)MAXPATHLEN, // For dll_dir & friends. 620 sizeof(SYS_EXT_DIR) + sizeof("/lib/") + strlen(cpu_arch), // invariant ld_library_path 621 (size_t)MAXPATHLEN + sizeof(EXTENSIONS_DIR) + sizeof(SYS_EXT_DIR) + sizeof(EXTENSIONS_DIR), // extensions dir 622 (size_t)MAXPATHLEN + sizeof(ENDORSED_DIR)); // endorsed dir 623 char *buf = (char *)NEW_C_HEAP_ARRAY(char, bufsize, mtInternal); 624 625 // sysclasspath, java_home, dll_dir 626 { 627 char *pslash; 628 os::jvm_path(buf, bufsize); 629 630 // Found the full path to libjvm.so. 631 // Now cut the path to <java_home>/jre if we can. 632 *(strrchr(buf, '/')) = '\0'; // Get rid of /libjvm.so. 633 pslash = strrchr(buf, '/'); 634 if (pslash != NULL) { 635 *pslash = '\0'; // Get rid of /{client|server|hotspot}. 636 } 637 Arguments::set_dll_dir(buf); 638 639 if (pslash != NULL) { 640 pslash = strrchr(buf, '/'); 641 if (pslash != NULL) { 642 *pslash = '\0'; // Get rid of /<arch>. 643 pslash = strrchr(buf, '/'); 644 if (pslash != NULL) { 645 *pslash = '\0'; // Get rid of /lib. 646 } 647 } 648 } 649 Arguments::set_java_home(buf); 650 set_boot_path('/', ':'); 651 } 652 653 // Where to look for native libraries. 654 { 655 // Use dlinfo() to determine the correct java.library.path. 656 // 657 // If we're launched by the Java launcher, and the user 658 // does not set java.library.path explicitly on the commandline, 659 // the Java launcher sets LD_LIBRARY_PATH for us and unsets 660 // LD_LIBRARY_PATH_32 and LD_LIBRARY_PATH_64. In this case 661 // dlinfo returns LD_LIBRARY_PATH + crle settings (including 662 // /usr/lib), which is exactly what we want. 663 // 664 // If the user does set java.library.path, it completely 665 // overwrites this setting, and always has. 666 // 667 // If we're not launched by the Java launcher, we may 668 // get here with any/all of the LD_LIBRARY_PATH[_32|64] 669 // settings. Again, dlinfo does exactly what we want. 670 671 Dl_serinfo info_sz, *info = &info_sz; 672 Dl_serpath *path; 673 char *library_path; 674 char *common_path = buf; 675 676 // Determine search path count and required buffer size. 677 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFOSIZE, (void *)info) == -1) { 678 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 679 vm_exit_during_initialization("dlinfo SERINFOSIZE request", dlerror()); 680 } 681 682 // Allocate new buffer and initialize. 683 info = (Dl_serinfo*)NEW_C_HEAP_ARRAY(char, info_sz.dls_size, mtInternal); 684 info->dls_size = info_sz.dls_size; 685 info->dls_cnt = info_sz.dls_cnt; 686 687 // Obtain search path information. 688 if (dlinfo(RTLD_SELF, RTLD_DI_SERINFO, (void *)info) == -1) { 689 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 690 FREE_C_HEAP_ARRAY(char, info, mtInternal); 691 vm_exit_during_initialization("dlinfo SERINFO request", dlerror()); 692 } 693 694 path = &info->dls_serpath[0]; 695 696 // Note: Due to a legacy implementation, most of the library path 697 // is set in the launcher. This was to accomodate linking restrictions 698 // on legacy Solaris implementations (which are no longer supported). 699 // Eventually, all the library path setting will be done here. 700 // 701 // However, to prevent the proliferation of improperly built native 702 // libraries, the new path component /usr/jdk/packages is added here. 703 704 // Determine the actual CPU architecture. 705 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 706#ifdef _LP64 707 // If we are a 64-bit vm, perform the following translations: 708 // sparc -> sparcv9 709 // i386 -> amd64 710 if (strcmp(cpu_arch, "sparc") == 0) { 711 strcat(cpu_arch, "v9"); 712 } else if (strcmp(cpu_arch, "i386") == 0) { 713 strcpy(cpu_arch, "amd64"); 714 } 715#endif 716 717 // Construct the invariant part of ld_library_path. 718 sprintf(common_path, SYS_EXT_DIR "/lib/%s", cpu_arch); 719 720 // Struct size is more than sufficient for the path components obtained 721 // through the dlinfo() call, so only add additional space for the path 722 // components explicitly added here. 723 size_t library_path_size = info->dls_size + strlen(common_path); 724 library_path = (char *)NEW_C_HEAP_ARRAY(char, library_path_size, mtInternal); 725 library_path[0] = '\0'; 726 727 // Construct the desired Java library path from the linker's library 728 // search path. 729 // 730 // For compatibility, it is optimal that we insert the additional path 731 // components specific to the Java VM after those components specified 732 // in LD_LIBRARY_PATH (if any) but before those added by the ld.so 733 // infrastructure. 734 if (info->dls_cnt == 0) { // Not sure this can happen, but allow for it. 735 strcpy(library_path, common_path); 736 } else { 737 int inserted = 0; 738 int i; 739 for (i = 0; i < info->dls_cnt; i++, path++) { 740 uint_t flags = path->dls_flags & LA_SER_MASK; 741 if (((flags & LA_SER_LIBPATH) == 0) && !inserted) { 742 strcat(library_path, common_path); 743 strcat(library_path, os::path_separator()); 744 inserted = 1; 745 } 746 strcat(library_path, path->dls_name); 747 strcat(library_path, os::path_separator()); 748 } 749 // Eliminate trailing path separator. 750 library_path[strlen(library_path)-1] = '\0'; 751 } 752 753 // happens before argument parsing - can't use a trace flag 754 // tty->print_raw("init_system_properties_values: native lib path: "); 755 // tty->print_raw_cr(library_path); 756 757 // Callee copies into its own buffer. 758 Arguments::set_library_path(library_path); 759 760 FREE_C_HEAP_ARRAY(char, library_path, mtInternal); 761 FREE_C_HEAP_ARRAY(char, info, mtInternal); 762 } 763 764 // Extensions directories. 765 sprintf(buf, "%s" EXTENSIONS_DIR ":" SYS_EXT_DIR EXTENSIONS_DIR, Arguments::get_java_home()); 766 Arguments::set_ext_dirs(buf); 767 768 // Endorsed standards default directory. 769 sprintf(buf, "%s" ENDORSED_DIR, Arguments::get_java_home()); 770 Arguments::set_endorsed_dirs(buf); 771 772 FREE_C_HEAP_ARRAY(char, buf, mtInternal); 773 774#undef SYS_EXT_DIR 775#undef EXTENSIONS_DIR 776#undef ENDORSED_DIR 777} 778 779void os::breakpoint() { 780 BREAKPOINT; 781} 782 783bool os::obsolete_option(const JavaVMOption *option) { 784 if (!strncmp(option->optionString, "-Xt", 3)) { 785 return true; 786 } else if (!strncmp(option->optionString, "-Xtm", 4)) { 787 return true; 788 } else if (!strncmp(option->optionString, "-Xverifyheap", 12)) { 789 return true; 790 } else if (!strncmp(option->optionString, "-Xmaxjitcodesize", 16)) { 791 return true; 792 } 793 return false; 794} 795 796bool os::Solaris::valid_stack_address(Thread* thread, address sp) { 797 address stackStart = (address)thread->stack_base(); 798 address stackEnd = (address)(stackStart - (address)thread->stack_size()); 799 if (sp < stackStart && sp >= stackEnd) return true; 800 return false; 801} 802 803extern "C" void breakpoint() { 804 // use debugger to set breakpoint here 805} 806 807static thread_t main_thread; 808 809// Thread start routine for all new Java threads 810extern "C" void* java_start(void* thread_addr) { 811 // Try to randomize the cache line index of hot stack frames. 812 // This helps when threads of the same stack traces evict each other's 813 // cache lines. The threads can be either from the same JVM instance, or 814 // from different JVM instances. The benefit is especially true for 815 // processors with hyperthreading technology. 816 static int counter = 0; 817 int pid = os::current_process_id(); 818 alloca(((pid ^ counter++) & 7) * 128); 819 820 int prio; 821 Thread* thread = (Thread*)thread_addr; 822 OSThread* osthr = thread->osthread(); 823 824 osthr->set_lwp_id(_lwp_self()); // Store lwp in case we are bound 825 thread->_schedctl = (void *) schedctl_init(); 826 827 if (UseNUMA) { 828 int lgrp_id = os::numa_get_group_id(); 829 if (lgrp_id != -1) { 830 thread->set_lgrp_id(lgrp_id); 831 } 832 } 833 834 // If the creator called set priority before we started, 835 // we need to call set_native_priority now that we have an lwp. 836 // We used to get the priority from thr_getprio (we called 837 // thr_setprio way back in create_thread) and pass it to 838 // set_native_priority, but Solaris scales the priority 839 // in java_to_os_priority, so when we read it back here, 840 // we pass trash to set_native_priority instead of what's 841 // in java_to_os_priority. So we save the native priority 842 // in the osThread and recall it here. 843 844 if (osthr->thread_id() != -1) { 845 if (UseThreadPriorities) { 846 int prio = osthr->native_priority(); 847 if (ThreadPriorityVerbose) { 848 tty->print_cr("Starting Thread " INTPTR_FORMAT ", LWP is " 849 INTPTR_FORMAT ", setting priority: %d\n", 850 osthr->thread_id(), osthr->lwp_id(), prio); 851 } 852 os::set_native_priority(thread, prio); 853 } 854 } else if (ThreadPriorityVerbose) { 855 warning("Can't set priority in _start routine, thread id hasn't been set\n"); 856 } 857 858 assert(osthr->get_state() == RUNNABLE, "invalid os thread state"); 859 860 // initialize signal mask for this thread 861 os::Solaris::hotspot_sigmask(thread); 862 863 thread->run(); 864 865 // One less thread is executing 866 // When the VMThread gets here, the main thread may have already exited 867 // which frees the CodeHeap containing the Atomic::dec code 868 if (thread != VMThread::vm_thread() && VMThread::vm_thread() != NULL) { 869 Atomic::dec(&os::Solaris::_os_thread_count); 870 } 871 872 if (UseDetachedThreads) { 873 thr_exit(NULL); 874 ShouldNotReachHere(); 875 } 876 return NULL; 877} 878 879static OSThread* create_os_thread(Thread* thread, thread_t thread_id) { 880 // Allocate the OSThread object 881 OSThread* osthread = new OSThread(NULL, NULL); 882 if (osthread == NULL) return NULL; 883 884 // Store info on the Solaris thread into the OSThread 885 osthread->set_thread_id(thread_id); 886 osthread->set_lwp_id(_lwp_self()); 887 thread->_schedctl = (void *) schedctl_init(); 888 889 if (UseNUMA) { 890 int lgrp_id = os::numa_get_group_id(); 891 if (lgrp_id != -1) { 892 thread->set_lgrp_id(lgrp_id); 893 } 894 } 895 896 if (ThreadPriorityVerbose) { 897 tty->print_cr("In create_os_thread, Thread " INTPTR_FORMAT ", LWP is " INTPTR_FORMAT "\n", 898 osthread->thread_id(), osthread->lwp_id()); 899 } 900 901 // Initial thread state is INITIALIZED, not SUSPENDED 902 osthread->set_state(INITIALIZED); 903 904 return osthread; 905} 906 907void os::Solaris::hotspot_sigmask(Thread* thread) { 908 //Save caller's signal mask 909 sigset_t sigmask; 910 thr_sigsetmask(SIG_SETMASK, NULL, &sigmask); 911 OSThread *osthread = thread->osthread(); 912 osthread->set_caller_sigmask(sigmask); 913 914 thr_sigsetmask(SIG_UNBLOCK, os::Solaris::unblocked_signals(), NULL); 915 if (!ReduceSignalUsage) { 916 if (thread->is_VM_thread()) { 917 // Only the VM thread handles BREAK_SIGNAL ... 918 thr_sigsetmask(SIG_UNBLOCK, vm_signals(), NULL); 919 } else { 920 // ... all other threads block BREAK_SIGNAL 921 assert(!sigismember(vm_signals(), SIGINT), "SIGINT should not be blocked"); 922 thr_sigsetmask(SIG_BLOCK, vm_signals(), NULL); 923 } 924 } 925} 926 927bool os::create_attached_thread(JavaThread* thread) { 928#ifdef ASSERT 929 thread->verify_not_published(); 930#endif 931 OSThread* osthread = create_os_thread(thread, thr_self()); 932 if (osthread == NULL) { 933 return false; 934 } 935 936 // Initial thread state is RUNNABLE 937 osthread->set_state(RUNNABLE); 938 thread->set_osthread(osthread); 939 940 // initialize signal mask for this thread 941 // and save the caller's signal mask 942 os::Solaris::hotspot_sigmask(thread); 943 944 return true; 945} 946 947bool os::create_main_thread(JavaThread* thread) { 948#ifdef ASSERT 949 thread->verify_not_published(); 950#endif 951 if (_starting_thread == NULL) { 952 _starting_thread = create_os_thread(thread, main_thread); 953 if (_starting_thread == NULL) { 954 return false; 955 } 956 } 957 958 // The primodial thread is runnable from the start 959 _starting_thread->set_state(RUNNABLE); 960 961 thread->set_osthread(_starting_thread); 962 963 // initialize signal mask for this thread 964 // and save the caller's signal mask 965 os::Solaris::hotspot_sigmask(thread); 966 967 return true; 968} 969 970 971bool os::create_thread(Thread* thread, ThreadType thr_type, 972 size_t stack_size) { 973 // Allocate the OSThread object 974 OSThread* osthread = new OSThread(NULL, NULL); 975 if (osthread == NULL) { 976 return false; 977 } 978 979 if (ThreadPriorityVerbose) { 980 char *thrtyp; 981 switch (thr_type) { 982 case vm_thread: 983 thrtyp = (char *)"vm"; 984 break; 985 case cgc_thread: 986 thrtyp = (char *)"cgc"; 987 break; 988 case pgc_thread: 989 thrtyp = (char *)"pgc"; 990 break; 991 case java_thread: 992 thrtyp = (char *)"java"; 993 break; 994 case compiler_thread: 995 thrtyp = (char *)"compiler"; 996 break; 997 case watcher_thread: 998 thrtyp = (char *)"watcher"; 999 break; 1000 default: 1001 thrtyp = (char *)"unknown"; 1002 break; 1003 } 1004 tty->print_cr("In create_thread, creating a %s thread\n", thrtyp); 1005 } 1006 1007 // Calculate stack size if it's not specified by caller. 1008 if (stack_size == 0) { 1009 // The default stack size 1M (2M for LP64). 1010 stack_size = (BytesPerWord >> 2) * K * K; 1011 1012 switch (thr_type) { 1013 case os::java_thread: 1014 // Java threads use ThreadStackSize which default value can be changed with the flag -Xss 1015 if (JavaThread::stack_size_at_create() > 0) stack_size = JavaThread::stack_size_at_create(); 1016 break; 1017 case os::compiler_thread: 1018 if (CompilerThreadStackSize > 0) { 1019 stack_size = (size_t)(CompilerThreadStackSize * K); 1020 break; 1021 } // else fall through: 1022 // use VMThreadStackSize if CompilerThreadStackSize is not defined 1023 case os::vm_thread: 1024 case os::pgc_thread: 1025 case os::cgc_thread: 1026 case os::watcher_thread: 1027 if (VMThreadStackSize > 0) stack_size = (size_t)(VMThreadStackSize * K); 1028 break; 1029 } 1030 } 1031 stack_size = MAX2(stack_size, os::Solaris::min_stack_allowed); 1032 1033 // Initial state is ALLOCATED but not INITIALIZED 1034 osthread->set_state(ALLOCATED); 1035 1036 if (os::Solaris::_os_thread_count > os::Solaris::_os_thread_limit) { 1037 // We got lots of threads. Check if we still have some address space left. 1038 // Need to be at least 5Mb of unreserved address space. We do check by 1039 // trying to reserve some. 1040 const size_t VirtualMemoryBangSize = 20*K*K; 1041 char* mem = os::reserve_memory(VirtualMemoryBangSize); 1042 if (mem == NULL) { 1043 delete osthread; 1044 return false; 1045 } else { 1046 // Release the memory again 1047 os::release_memory(mem, VirtualMemoryBangSize); 1048 } 1049 } 1050 1051 // Setup osthread because the child thread may need it. 1052 thread->set_osthread(osthread); 1053 1054 // Create the Solaris thread 1055 thread_t tid = 0; 1056 long flags = (UseDetachedThreads ? THR_DETACHED : 0) | THR_SUSPENDED; 1057 int status; 1058 1059 // Mark that we don't have an lwp or thread id yet. 1060 // In case we attempt to set the priority before the thread starts. 1061 osthread->set_lwp_id(-1); 1062 osthread->set_thread_id(-1); 1063 1064 status = thr_create(NULL, stack_size, java_start, thread, flags, &tid); 1065 if (status != 0) { 1066 if (PrintMiscellaneous && (Verbose || WizardMode)) { 1067 perror("os::create_thread"); 1068 } 1069 thread->set_osthread(NULL); 1070 // Need to clean up stuff we've allocated so far 1071 delete osthread; 1072 return false; 1073 } 1074 1075 Atomic::inc(&os::Solaris::_os_thread_count); 1076 1077 // Store info on the Solaris thread into the OSThread 1078 osthread->set_thread_id(tid); 1079 1080 // Remember that we created this thread so we can set priority on it 1081 osthread->set_vm_created(); 1082 1083 // Initial thread state is INITIALIZED, not SUSPENDED 1084 osthread->set_state(INITIALIZED); 1085 1086 // The thread is returned suspended (in state INITIALIZED), and is started higher up in the call chain 1087 return true; 1088} 1089 1090// defined for >= Solaris 10. This allows builds on earlier versions 1091// of Solaris to take advantage of the newly reserved Solaris JVM signals 1092// With SIGJVM1, SIGJVM2, INTERRUPT_SIGNAL is SIGJVM1, ASYNC_SIGNAL is SIGJVM2 1093// and -XX:+UseAltSigs does nothing since these should have no conflict 1094// 1095#if !defined(SIGJVM1) 1096 #define SIGJVM1 39 1097 #define SIGJVM2 40 1098#endif 1099 1100debug_only(static bool signal_sets_initialized = false); 1101static sigset_t unblocked_sigs, vm_sigs, allowdebug_blocked_sigs; 1102int os::Solaris::_SIGinterrupt = INTERRUPT_SIGNAL; 1103int os::Solaris::_SIGasync = ASYNC_SIGNAL; 1104 1105bool os::Solaris::is_sig_ignored(int sig) { 1106 struct sigaction oact; 1107 sigaction(sig, (struct sigaction*)NULL, &oact); 1108 void* ohlr = oact.sa_sigaction ? CAST_FROM_FN_PTR(void*, oact.sa_sigaction) 1109 : CAST_FROM_FN_PTR(void*, oact.sa_handler); 1110 if (ohlr == CAST_FROM_FN_PTR(void*, SIG_IGN)) { 1111 return true; 1112 } else { 1113 return false; 1114 } 1115} 1116 1117// Note: SIGRTMIN is a macro that calls sysconf() so it will 1118// dynamically detect SIGRTMIN value for the system at runtime, not buildtime 1119static bool isJVM1available() { 1120 return SIGJVM1 < SIGRTMIN; 1121} 1122 1123void os::Solaris::signal_sets_init() { 1124 // Should also have an assertion stating we are still single-threaded. 1125 assert(!signal_sets_initialized, "Already initialized"); 1126 // Fill in signals that are necessarily unblocked for all threads in 1127 // the VM. Currently, we unblock the following signals: 1128 // SHUTDOWN{1,2,3}_SIGNAL: for shutdown hooks support (unless over-ridden 1129 // by -Xrs (=ReduceSignalUsage)); 1130 // BREAK_SIGNAL which is unblocked only by the VM thread and blocked by all 1131 // other threads. The "ReduceSignalUsage" boolean tells us not to alter 1132 // the dispositions or masks wrt these signals. 1133 // Programs embedding the VM that want to use the above signals for their 1134 // own purposes must, at this time, use the "-Xrs" option to prevent 1135 // interference with shutdown hooks and BREAK_SIGNAL thread dumping. 1136 // (See bug 4345157, and other related bugs). 1137 // In reality, though, unblocking these signals is really a nop, since 1138 // these signals are not blocked by default. 1139 sigemptyset(&unblocked_sigs); 1140 sigemptyset(&allowdebug_blocked_sigs); 1141 sigaddset(&unblocked_sigs, SIGILL); 1142 sigaddset(&unblocked_sigs, SIGSEGV); 1143 sigaddset(&unblocked_sigs, SIGBUS); 1144 sigaddset(&unblocked_sigs, SIGFPE); 1145 1146 if (isJVM1available) { 1147 os::Solaris::set_SIGinterrupt(SIGJVM1); 1148 os::Solaris::set_SIGasync(SIGJVM2); 1149 } else if (UseAltSigs) { 1150 os::Solaris::set_SIGinterrupt(ALT_INTERRUPT_SIGNAL); 1151 os::Solaris::set_SIGasync(ALT_ASYNC_SIGNAL); 1152 } else { 1153 os::Solaris::set_SIGinterrupt(INTERRUPT_SIGNAL); 1154 os::Solaris::set_SIGasync(ASYNC_SIGNAL); 1155 } 1156 1157 sigaddset(&unblocked_sigs, os::Solaris::SIGinterrupt()); 1158 sigaddset(&unblocked_sigs, os::Solaris::SIGasync()); 1159 1160 if (!ReduceSignalUsage) { 1161 if (!os::Solaris::is_sig_ignored(SHUTDOWN1_SIGNAL)) { 1162 sigaddset(&unblocked_sigs, SHUTDOWN1_SIGNAL); 1163 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN1_SIGNAL); 1164 } 1165 if (!os::Solaris::is_sig_ignored(SHUTDOWN2_SIGNAL)) { 1166 sigaddset(&unblocked_sigs, SHUTDOWN2_SIGNAL); 1167 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN2_SIGNAL); 1168 } 1169 if (!os::Solaris::is_sig_ignored(SHUTDOWN3_SIGNAL)) { 1170 sigaddset(&unblocked_sigs, SHUTDOWN3_SIGNAL); 1171 sigaddset(&allowdebug_blocked_sigs, SHUTDOWN3_SIGNAL); 1172 } 1173 } 1174 // Fill in signals that are blocked by all but the VM thread. 1175 sigemptyset(&vm_sigs); 1176 if (!ReduceSignalUsage) { 1177 sigaddset(&vm_sigs, BREAK_SIGNAL); 1178 } 1179 debug_only(signal_sets_initialized = true); 1180 1181 // For diagnostics only used in run_periodic_checks 1182 sigemptyset(&check_signal_done); 1183} 1184 1185// These are signals that are unblocked while a thread is running Java. 1186// (For some reason, they get blocked by default.) 1187sigset_t* os::Solaris::unblocked_signals() { 1188 assert(signal_sets_initialized, "Not initialized"); 1189 return &unblocked_sigs; 1190} 1191 1192// These are the signals that are blocked while a (non-VM) thread is 1193// running Java. Only the VM thread handles these signals. 1194sigset_t* os::Solaris::vm_signals() { 1195 assert(signal_sets_initialized, "Not initialized"); 1196 return &vm_sigs; 1197} 1198 1199// These are signals that are blocked during cond_wait to allow debugger in 1200sigset_t* os::Solaris::allowdebug_blocked_signals() { 1201 assert(signal_sets_initialized, "Not initialized"); 1202 return &allowdebug_blocked_sigs; 1203} 1204 1205 1206void _handle_uncaught_cxx_exception() { 1207 VMError err("An uncaught C++ exception"); 1208 err.report_and_die(); 1209} 1210 1211 1212// First crack at OS-specific initialization, from inside the new thread. 1213void os::initialize_thread(Thread* thr) { 1214 int r = thr_main(); 1215 guarantee(r == 0 || r == 1, "CR6501650 or CR6493689"); 1216 if (r) { 1217 JavaThread* jt = (JavaThread *)thr; 1218 assert(jt != NULL, "Sanity check"); 1219 size_t stack_size; 1220 address base = jt->stack_base(); 1221 if (Arguments::created_by_java_launcher()) { 1222 // Use 2MB to allow for Solaris 7 64 bit mode. 1223 stack_size = JavaThread::stack_size_at_create() == 0 1224 ? 2048*K : JavaThread::stack_size_at_create(); 1225 1226 // There are rare cases when we may have already used more than 1227 // the basic stack size allotment before this method is invoked. 1228 // Attempt to allow for a normally sized java_stack. 1229 size_t current_stack_offset = (size_t)(base - (address)&stack_size); 1230 stack_size += ReservedSpace::page_align_size_down(current_stack_offset); 1231 } else { 1232 // 6269555: If we were not created by a Java launcher, i.e. if we are 1233 // running embedded in a native application, treat the primordial thread 1234 // as much like a native attached thread as possible. This means using 1235 // the current stack size from thr_stksegment(), unless it is too large 1236 // to reliably setup guard pages. A reasonable max size is 8MB. 1237 size_t current_size = current_stack_size(); 1238 // This should never happen, but just in case.... 1239 if (current_size == 0) current_size = 2 * K * K; 1240 stack_size = current_size > (8 * K * K) ? (8 * K * K) : current_size; 1241 } 1242 address bottom = (address)align_size_up((intptr_t)(base - stack_size), os::vm_page_size());; 1243 stack_size = (size_t)(base - bottom); 1244 1245 assert(stack_size > 0, "Stack size calculation problem"); 1246 1247 if (stack_size > jt->stack_size()) { 1248#ifndef PRODUCT 1249 struct rlimit limits; 1250 getrlimit(RLIMIT_STACK, &limits); 1251 size_t size = adjust_stack_size(base, (size_t)limits.rlim_cur); 1252 assert(size >= jt->stack_size(), "Stack size problem in main thread"); 1253#endif 1254 tty->print_cr("Stack size of %d Kb exceeds current limit of %d Kb.\n" 1255 "(Stack sizes are rounded up to a multiple of the system page size.)\n" 1256 "See limit(1) to increase the stack size limit.", 1257 stack_size / K, jt->stack_size() / K); 1258 vm_exit(1); 1259 } 1260 assert(jt->stack_size() >= stack_size, 1261 "Attempt to map more stack than was allocated"); 1262 jt->set_stack_size(stack_size); 1263 } 1264 1265 // With the T2 libthread (T1 is no longer supported) threads are always bound 1266 // and we use stackbanging in all cases. 1267 1268 os::Solaris::init_thread_fpu_state(); 1269 std::set_terminate(_handle_uncaught_cxx_exception); 1270} 1271 1272 1273 1274// Free Solaris resources related to the OSThread 1275void os::free_thread(OSThread* osthread) { 1276 assert(osthread != NULL, "os::free_thread but osthread not set"); 1277 1278 1279 // We are told to free resources of the argument thread, 1280 // but we can only really operate on the current thread. 1281 // The main thread must take the VMThread down synchronously 1282 // before the main thread exits and frees up CodeHeap 1283 guarantee((Thread::current()->osthread() == osthread 1284 || (osthread == VMThread::vm_thread()->osthread())), "os::free_thread but not current thread"); 1285 if (Thread::current()->osthread() == osthread) { 1286 // Restore caller's signal mask 1287 sigset_t sigmask = osthread->caller_sigmask(); 1288 thr_sigsetmask(SIG_SETMASK, &sigmask, NULL); 1289 } 1290 delete osthread; 1291} 1292 1293void os::pd_start_thread(Thread* thread) { 1294 int status = thr_continue(thread->osthread()->thread_id()); 1295 assert_status(status == 0, status, "thr_continue failed"); 1296} 1297 1298 1299intx os::current_thread_id() { 1300 return (intx)thr_self(); 1301} 1302 1303static pid_t _initial_pid = 0; 1304 1305int os::current_process_id() { 1306 return (int)(_initial_pid ? _initial_pid : getpid()); 1307} 1308 1309int os::allocate_thread_local_storage() { 1310 // %%% in Win32 this allocates a memory segment pointed to by a 1311 // register. Dan Stein can implement a similar feature in 1312 // Solaris. Alternatively, the VM can do the same thing 1313 // explicitly: malloc some storage and keep the pointer in a 1314 // register (which is part of the thread's context) (or keep it 1315 // in TLS). 1316 // %%% In current versions of Solaris, thr_self and TSD can 1317 // be accessed via short sequences of displaced indirections. 1318 // The value of thr_self is available as %g7(36). 1319 // The value of thr_getspecific(k) is stored in %g7(12)(4)(k*4-4), 1320 // assuming that the current thread already has a value bound to k. 1321 // It may be worth experimenting with such access patterns, 1322 // and later having the parameters formally exported from a Solaris 1323 // interface. I think, however, that it will be faster to 1324 // maintain the invariant that %g2 always contains the 1325 // JavaThread in Java code, and have stubs simply 1326 // treat %g2 as a caller-save register, preserving it in a %lN. 1327 thread_key_t tk; 1328 if (thr_keycreate(&tk, NULL)) { 1329 fatal(err_msg("os::allocate_thread_local_storage: thr_keycreate failed " 1330 "(%s)", strerror(errno))); 1331 } 1332 return int(tk); 1333} 1334 1335void os::free_thread_local_storage(int index) { 1336 // %%% don't think we need anything here 1337 // if (pthread_key_delete((pthread_key_t) tk)) { 1338 // fatal("os::free_thread_local_storage: pthread_key_delete failed"); 1339 // } 1340} 1341 1342// libthread allocate for tsd_common is a version specific 1343// small number - point is NO swap space available 1344#define SMALLINT 32 1345void os::thread_local_storage_at_put(int index, void* value) { 1346 // %%% this is used only in threadLocalStorage.cpp 1347 if (thr_setspecific((thread_key_t)index, value)) { 1348 if (errno == ENOMEM) { 1349 vm_exit_out_of_memory(SMALLINT, OOM_MALLOC_ERROR, 1350 "thr_setspecific: out of swap space"); 1351 } else { 1352 fatal(err_msg("os::thread_local_storage_at_put: thr_setspecific failed " 1353 "(%s)", strerror(errno))); 1354 } 1355 } else { 1356 ThreadLocalStorage::set_thread_in_slot((Thread *) value); 1357 } 1358} 1359 1360// This function could be called before TLS is initialized, for example, when 1361// VM receives an async signal or when VM causes a fatal error during 1362// initialization. Return NULL if thr_getspecific() fails. 1363void* os::thread_local_storage_at(int index) { 1364 // %%% this is used only in threadLocalStorage.cpp 1365 void* r = NULL; 1366 return thr_getspecific((thread_key_t)index, &r) != 0 ? NULL : r; 1367} 1368 1369 1370// gethrtime() should be monotonic according to the documentation, 1371// but some virtualized platforms are known to break this guarantee. 1372// getTimeNanos() must be guaranteed not to move backwards, so we 1373// are forced to add a check here. 1374inline hrtime_t getTimeNanos() { 1375 const hrtime_t now = gethrtime(); 1376 const hrtime_t prev = max_hrtime; 1377 if (now <= prev) { 1378 return prev; // same or retrograde time; 1379 } 1380 const hrtime_t obsv = Atomic::cmpxchg(now, (volatile jlong*)&max_hrtime, prev); 1381 assert(obsv >= prev, "invariant"); // Monotonicity 1382 // If the CAS succeeded then we're done and return "now". 1383 // If the CAS failed and the observed value "obsv" is >= now then 1384 // we should return "obsv". If the CAS failed and now > obsv > prv then 1385 // some other thread raced this thread and installed a new value, in which case 1386 // we could either (a) retry the entire operation, (b) retry trying to install now 1387 // or (c) just return obsv. We use (c). No loop is required although in some cases 1388 // we might discard a higher "now" value in deference to a slightly lower but freshly 1389 // installed obsv value. That's entirely benign -- it admits no new orderings compared 1390 // to (a) or (b) -- and greatly reduces coherence traffic. 1391 // We might also condition (c) on the magnitude of the delta between obsv and now. 1392 // Avoiding excessive CAS operations to hot RW locations is critical. 1393 // See https://blogs.oracle.com/dave/entry/cas_and_cache_trivia_invalidate 1394 return (prev == obsv) ? now : obsv; 1395} 1396 1397// Time since start-up in seconds to a fine granularity. 1398// Used by VMSelfDestructTimer and the MemProfiler. 1399double os::elapsedTime() { 1400 return (double)(getTimeNanos() - first_hrtime) / (double)hrtime_hz; 1401} 1402 1403jlong os::elapsed_counter() { 1404 return (jlong)(getTimeNanos() - first_hrtime); 1405} 1406 1407jlong os::elapsed_frequency() { 1408 return hrtime_hz; 1409} 1410 1411// Return the real, user, and system times in seconds from an 1412// arbitrary fixed point in the past. 1413bool os::getTimesSecs(double* process_real_time, 1414 double* process_user_time, 1415 double* process_system_time) { 1416 struct tms ticks; 1417 clock_t real_ticks = times(&ticks); 1418 1419 if (real_ticks == (clock_t) (-1)) { 1420 return false; 1421 } else { 1422 double ticks_per_second = (double) clock_tics_per_sec; 1423 *process_user_time = ((double) ticks.tms_utime) / ticks_per_second; 1424 *process_system_time = ((double) ticks.tms_stime) / ticks_per_second; 1425 // For consistency return the real time from getTimeNanos() 1426 // converted to seconds. 1427 *process_real_time = ((double) getTimeNanos()) / ((double) NANOUNITS); 1428 1429 return true; 1430 } 1431} 1432 1433bool os::supports_vtime() { return true; } 1434 1435bool os::enable_vtime() { 1436 int fd = ::open("/proc/self/ctl", O_WRONLY); 1437 if (fd == -1) { 1438 return false; 1439 } 1440 1441 long cmd[] = { PCSET, PR_MSACCT }; 1442 int res = ::write(fd, cmd, sizeof(long) * 2); 1443 ::close(fd); 1444 if (res != sizeof(long) * 2) { 1445 return false; 1446 } 1447 return true; 1448} 1449 1450bool os::vtime_enabled() { 1451 int fd = ::open("/proc/self/status", O_RDONLY); 1452 if (fd == -1) { 1453 return false; 1454 } 1455 1456 pstatus_t status; 1457 int res = os::read(fd, (void*) &status, sizeof(pstatus_t)); 1458 ::close(fd); 1459 if (res != sizeof(pstatus_t)) { 1460 return false; 1461 } 1462 return status.pr_flags & PR_MSACCT; 1463} 1464 1465double os::elapsedVTime() { 1466 return (double)gethrvtime() / (double)hrtime_hz; 1467} 1468 1469// Used internally for comparisons only 1470// getTimeMillis guaranteed to not move backwards on Solaris 1471jlong getTimeMillis() { 1472 jlong nanotime = getTimeNanos(); 1473 return (jlong)(nanotime / NANOSECS_PER_MILLISEC); 1474} 1475 1476// Must return millis since Jan 1 1970 for JVM_CurrentTimeMillis 1477jlong os::javaTimeMillis() { 1478 timeval t; 1479 if (gettimeofday(&t, NULL) == -1) { 1480 fatal(err_msg("os::javaTimeMillis: gettimeofday (%s)", strerror(errno))); 1481 } 1482 return jlong(t.tv_sec) * 1000 + jlong(t.tv_usec) / 1000; 1483} 1484 1485jlong os::javaTimeNanos() { 1486 return (jlong)getTimeNanos(); 1487} 1488 1489void os::javaTimeNanos_info(jvmtiTimerInfo *info_ptr) { 1490 info_ptr->max_value = ALL_64_BITS; // gethrtime() uses all 64 bits 1491 info_ptr->may_skip_backward = false; // not subject to resetting or drifting 1492 info_ptr->may_skip_forward = false; // not subject to resetting or drifting 1493 info_ptr->kind = JVMTI_TIMER_ELAPSED; // elapsed not CPU time 1494} 1495 1496char * os::local_time_string(char *buf, size_t buflen) { 1497 struct tm t; 1498 time_t long_time; 1499 time(&long_time); 1500 localtime_r(&long_time, &t); 1501 jio_snprintf(buf, buflen, "%d-%02d-%02d %02d:%02d:%02d", 1502 t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, 1503 t.tm_hour, t.tm_min, t.tm_sec); 1504 return buf; 1505} 1506 1507// Note: os::shutdown() might be called very early during initialization, or 1508// called from signal handler. Before adding something to os::shutdown(), make 1509// sure it is async-safe and can handle partially initialized VM. 1510void os::shutdown() { 1511 1512 // allow PerfMemory to attempt cleanup of any persistent resources 1513 perfMemory_exit(); 1514 1515 // needs to remove object in file system 1516 AttachListener::abort(); 1517 1518 // flush buffered output, finish log files 1519 ostream_abort(); 1520 1521 // Check for abort hook 1522 abort_hook_t abort_hook = Arguments::abort_hook(); 1523 if (abort_hook != NULL) { 1524 abort_hook(); 1525 } 1526} 1527 1528// Note: os::abort() might be called very early during initialization, or 1529// called from signal handler. Before adding something to os::abort(), make 1530// sure it is async-safe and can handle partially initialized VM. 1531void os::abort(bool dump_core) { 1532 os::shutdown(); 1533 if (dump_core) { 1534#ifndef PRODUCT 1535 fdStream out(defaultStream::output_fd()); 1536 out.print_raw("Current thread is "); 1537 char buf[16]; 1538 jio_snprintf(buf, sizeof(buf), UINTX_FORMAT, os::current_thread_id()); 1539 out.print_raw_cr(buf); 1540 out.print_raw_cr("Dumping core ..."); 1541#endif 1542 ::abort(); // dump core (for debugging) 1543 } 1544 1545 ::exit(1); 1546} 1547 1548// Die immediately, no exit hook, no abort hook, no cleanup. 1549void os::die() { 1550 ::abort(); // dump core (for debugging) 1551} 1552 1553// DLL functions 1554 1555const char* os::dll_file_extension() { return ".so"; } 1556 1557// This must be hard coded because it's the system's temporary 1558// directory not the java application's temp directory, ala java.io.tmpdir. 1559const char* os::get_temp_directory() { return "/tmp"; } 1560 1561static bool file_exists(const char* filename) { 1562 struct stat statbuf; 1563 if (filename == NULL || strlen(filename) == 0) { 1564 return false; 1565 } 1566 return os::stat(filename, &statbuf) == 0; 1567} 1568 1569bool os::dll_build_name(char* buffer, size_t buflen, 1570 const char* pname, const char* fname) { 1571 bool retval = false; 1572 const size_t pnamelen = pname ? strlen(pname) : 0; 1573 1574 // Return error on buffer overflow. 1575 if (pnamelen + strlen(fname) + 10 > (size_t) buflen) { 1576 return retval; 1577 } 1578 1579 if (pnamelen == 0) { 1580 snprintf(buffer, buflen, "lib%s.so", fname); 1581 retval = true; 1582 } else if (strchr(pname, *os::path_separator()) != NULL) { 1583 int n; 1584 char** pelements = split_path(pname, &n); 1585 if (pelements == NULL) { 1586 return false; 1587 } 1588 for (int i = 0; i < n; i++) { 1589 // really shouldn't be NULL but what the heck, check can't hurt 1590 if (pelements[i] == NULL || strlen(pelements[i]) == 0) { 1591 continue; // skip the empty path values 1592 } 1593 snprintf(buffer, buflen, "%s/lib%s.so", pelements[i], fname); 1594 if (file_exists(buffer)) { 1595 retval = true; 1596 break; 1597 } 1598 } 1599 // release the storage 1600 for (int i = 0; i < n; i++) { 1601 if (pelements[i] != NULL) { 1602 FREE_C_HEAP_ARRAY(char, pelements[i], mtInternal); 1603 } 1604 } 1605 if (pelements != NULL) { 1606 FREE_C_HEAP_ARRAY(char*, pelements, mtInternal); 1607 } 1608 } else { 1609 snprintf(buffer, buflen, "%s/lib%s.so", pname, fname); 1610 retval = true; 1611 } 1612 return retval; 1613} 1614 1615// check if addr is inside libjvm.so 1616bool os::address_is_in_vm(address addr) { 1617 static address libjvm_base_addr; 1618 Dl_info dlinfo; 1619 1620 if (libjvm_base_addr == NULL) { 1621 if (dladdr(CAST_FROM_FN_PTR(void *, os::address_is_in_vm), &dlinfo) != 0) { 1622 libjvm_base_addr = (address)dlinfo.dli_fbase; 1623 } 1624 assert(libjvm_base_addr !=NULL, "Cannot obtain base address for libjvm"); 1625 } 1626 1627 if (dladdr((void *)addr, &dlinfo) != 0) { 1628 if (libjvm_base_addr == (address)dlinfo.dli_fbase) return true; 1629 } 1630 1631 return false; 1632} 1633 1634typedef int (*dladdr1_func_type)(void *, Dl_info *, void **, int); 1635static dladdr1_func_type dladdr1_func = NULL; 1636 1637bool os::dll_address_to_function_name(address addr, char *buf, 1638 int buflen, int * offset) { 1639 // buf is not optional, but offset is optional 1640 assert(buf != NULL, "sanity check"); 1641 1642 Dl_info dlinfo; 1643 1644 // dladdr1_func was initialized in os::init() 1645 if (dladdr1_func != NULL) { 1646 // yes, we have dladdr1 1647 1648 // Support for dladdr1 is checked at runtime; it may be 1649 // available even if the vm is built on a machine that does 1650 // not have dladdr1 support. Make sure there is a value for 1651 // RTLD_DL_SYMENT. 1652#ifndef RTLD_DL_SYMENT 1653 #define RTLD_DL_SYMENT 1 1654#endif 1655#ifdef _LP64 1656 Elf64_Sym * info; 1657#else 1658 Elf32_Sym * info; 1659#endif 1660 if (dladdr1_func((void *)addr, &dlinfo, (void **)&info, 1661 RTLD_DL_SYMENT) != 0) { 1662 // see if we have a matching symbol that covers our address 1663 if (dlinfo.dli_saddr != NULL && 1664 (char *)dlinfo.dli_saddr + info->st_size > (char *)addr) { 1665 if (dlinfo.dli_sname != NULL) { 1666 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1667 jio_snprintf(buf, buflen, "%s", dlinfo.dli_sname); 1668 } 1669 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1670 return true; 1671 } 1672 } 1673 // no matching symbol so try for just file info 1674 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1675 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1676 buf, buflen, offset, dlinfo.dli_fname)) { 1677 return true; 1678 } 1679 } 1680 } 1681 buf[0] = '\0'; 1682 if (offset != NULL) *offset = -1; 1683 return false; 1684 } 1685 1686 // no, only dladdr is available 1687 if (dladdr((void *)addr, &dlinfo) != 0) { 1688 // see if we have a matching symbol 1689 if (dlinfo.dli_saddr != NULL && dlinfo.dli_sname != NULL) { 1690 if (!Decoder::demangle(dlinfo.dli_sname, buf, buflen)) { 1691 jio_snprintf(buf, buflen, dlinfo.dli_sname); 1692 } 1693 if (offset != NULL) *offset = addr - (address)dlinfo.dli_saddr; 1694 return true; 1695 } 1696 // no matching symbol so try for just file info 1697 if (dlinfo.dli_fname != NULL && dlinfo.dli_fbase != NULL) { 1698 if (Decoder::decode((address)(addr - (address)dlinfo.dli_fbase), 1699 buf, buflen, offset, dlinfo.dli_fname)) { 1700 return true; 1701 } 1702 } 1703 } 1704 buf[0] = '\0'; 1705 if (offset != NULL) *offset = -1; 1706 return false; 1707} 1708 1709bool os::dll_address_to_library_name(address addr, char* buf, 1710 int buflen, int* offset) { 1711 // buf is not optional, but offset is optional 1712 assert(buf != NULL, "sanity check"); 1713 1714 Dl_info dlinfo; 1715 1716 if (dladdr((void*)addr, &dlinfo) != 0) { 1717 if (dlinfo.dli_fname != NULL) { 1718 jio_snprintf(buf, buflen, "%s", dlinfo.dli_fname); 1719 } 1720 if (dlinfo.dli_fbase != NULL && offset != NULL) { 1721 *offset = addr - (address)dlinfo.dli_fbase; 1722 } 1723 return true; 1724 } 1725 1726 buf[0] = '\0'; 1727 if (offset) *offset = -1; 1728 return false; 1729} 1730 1731int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) { 1732 Dl_info dli; 1733 // Sanity check? 1734 if (dladdr(CAST_FROM_FN_PTR(void *, os::get_loaded_modules_info), &dli) == 0 || 1735 dli.dli_fname == NULL) { 1736 return 1; 1737 } 1738 1739 void * handle = dlopen(dli.dli_fname, RTLD_LAZY); 1740 if (handle == NULL) { 1741 return 1; 1742 } 1743 1744 Link_map *map; 1745 dlinfo(handle, RTLD_DI_LINKMAP, &map); 1746 if (map == NULL) { 1747 dlclose(handle); 1748 return 1; 1749 } 1750 1751 while (map->l_prev != NULL) { 1752 map = map->l_prev; 1753 } 1754 1755 while (map != NULL) { 1756 // Iterate through all map entries and call callback with fields of interest 1757 if(callback(map->l_name, (address)map->l_addr, (address)0, param)) { 1758 dlclose(handle); 1759 return 1; 1760 } 1761 map = map->l_next; 1762 } 1763 1764 dlclose(handle); 1765 return 0; 1766} 1767 1768int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) { 1769 outputStream * out = (outputStream *) param; 1770 out->print_cr(PTR_FORMAT " \t%s", base_address, name); 1771 return 0; 1772} 1773 1774void os::print_dll_info(outputStream * st) { 1775 st->print_cr("Dynamic libraries:"); st->flush(); 1776 if (get_loaded_modules_info(_print_dll_info_cb, (void *)st)) { 1777 st->print_cr("Error: Cannot print dynamic libraries."); 1778 } 1779} 1780 1781// Loads .dll/.so and 1782// in case of error it checks if .dll/.so was built for the 1783// same architecture as Hotspot is running on 1784 1785void * os::dll_load(const char *filename, char *ebuf, int ebuflen) { 1786 void * result= ::dlopen(filename, RTLD_LAZY); 1787 if (result != NULL) { 1788 // Successful loading 1789 return result; 1790 } 1791 1792 Elf32_Ehdr elf_head; 1793 1794 // Read system error message into ebuf 1795 // It may or may not be overwritten below 1796 ::strncpy(ebuf, ::dlerror(), ebuflen-1); 1797 ebuf[ebuflen-1]='\0'; 1798 int diag_msg_max_length=ebuflen-strlen(ebuf); 1799 char* diag_msg_buf=ebuf+strlen(ebuf); 1800 1801 if (diag_msg_max_length==0) { 1802 // No more space in ebuf for additional diagnostics message 1803 return NULL; 1804 } 1805 1806 1807 int file_descriptor= ::open(filename, O_RDONLY | O_NONBLOCK); 1808 1809 if (file_descriptor < 0) { 1810 // Can't open library, report dlerror() message 1811 return NULL; 1812 } 1813 1814 bool failed_to_read_elf_head= 1815 (sizeof(elf_head)!= 1816 (::read(file_descriptor, &elf_head,sizeof(elf_head)))); 1817 1818 ::close(file_descriptor); 1819 if (failed_to_read_elf_head) { 1820 // file i/o error - report dlerror() msg 1821 return NULL; 1822 } 1823 1824 typedef struct { 1825 Elf32_Half code; // Actual value as defined in elf.h 1826 Elf32_Half compat_class; // Compatibility of archs at VM's sense 1827 char elf_class; // 32 or 64 bit 1828 char endianess; // MSB or LSB 1829 char* name; // String representation 1830 } arch_t; 1831 1832 static const arch_t arch_array[]={ 1833 {EM_386, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1834 {EM_486, EM_386, ELFCLASS32, ELFDATA2LSB, (char*)"IA 32"}, 1835 {EM_IA_64, EM_IA_64, ELFCLASS64, ELFDATA2LSB, (char*)"IA 64"}, 1836 {EM_X86_64, EM_X86_64, ELFCLASS64, ELFDATA2LSB, (char*)"AMD 64"}, 1837 {EM_SPARC, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1838 {EM_SPARC32PLUS, EM_SPARC, ELFCLASS32, ELFDATA2MSB, (char*)"Sparc 32"}, 1839 {EM_SPARCV9, EM_SPARCV9, ELFCLASS64, ELFDATA2MSB, (char*)"Sparc v9 64"}, 1840 {EM_PPC, EM_PPC, ELFCLASS32, ELFDATA2MSB, (char*)"Power PC 32"}, 1841 {EM_PPC64, EM_PPC64, ELFCLASS64, ELFDATA2MSB, (char*)"Power PC 64"}, 1842 {EM_ARM, EM_ARM, ELFCLASS32, ELFDATA2LSB, (char*)"ARM 32"} 1843 }; 1844 1845#if (defined IA32) 1846 static Elf32_Half running_arch_code=EM_386; 1847#elif (defined AMD64) 1848 static Elf32_Half running_arch_code=EM_X86_64; 1849#elif (defined IA64) 1850 static Elf32_Half running_arch_code=EM_IA_64; 1851#elif (defined __sparc) && (defined _LP64) 1852 static Elf32_Half running_arch_code=EM_SPARCV9; 1853#elif (defined __sparc) && (!defined _LP64) 1854 static Elf32_Half running_arch_code=EM_SPARC; 1855#elif (defined __powerpc64__) 1856 static Elf32_Half running_arch_code=EM_PPC64; 1857#elif (defined __powerpc__) 1858 static Elf32_Half running_arch_code=EM_PPC; 1859#elif (defined ARM) 1860 static Elf32_Half running_arch_code=EM_ARM; 1861#else 1862 #error Method os::dll_load requires that one of following is defined:\ 1863 IA32, AMD64, IA64, __sparc, __powerpc__, ARM, ARM 1864#endif 1865 1866 // Identify compatability class for VM's architecture and library's architecture 1867 // Obtain string descriptions for architectures 1868 1869 arch_t lib_arch={elf_head.e_machine,0,elf_head.e_ident[EI_CLASS], elf_head.e_ident[EI_DATA], NULL}; 1870 int running_arch_index=-1; 1871 1872 for (unsigned int i=0; i < ARRAY_SIZE(arch_array); i++) { 1873 if (running_arch_code == arch_array[i].code) { 1874 running_arch_index = i; 1875 } 1876 if (lib_arch.code == arch_array[i].code) { 1877 lib_arch.compat_class = arch_array[i].compat_class; 1878 lib_arch.name = arch_array[i].name; 1879 } 1880 } 1881 1882 assert(running_arch_index != -1, 1883 "Didn't find running architecture code (running_arch_code) in arch_array"); 1884 if (running_arch_index == -1) { 1885 // Even though running architecture detection failed 1886 // we may still continue with reporting dlerror() message 1887 return NULL; 1888 } 1889 1890 if (lib_arch.endianess != arch_array[running_arch_index].endianess) { 1891 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: endianness mismatch)"); 1892 return NULL; 1893 } 1894 1895 if (lib_arch.elf_class != arch_array[running_arch_index].elf_class) { 1896 ::snprintf(diag_msg_buf, diag_msg_max_length-1," (Possible cause: architecture word width mismatch)"); 1897 return NULL; 1898 } 1899 1900 if (lib_arch.compat_class != arch_array[running_arch_index].compat_class) { 1901 if (lib_arch.name!=NULL) { 1902 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1903 " (Possible cause: can't load %s-bit .so on a %s-bit platform)", 1904 lib_arch.name, arch_array[running_arch_index].name); 1905 } else { 1906 ::snprintf(diag_msg_buf, diag_msg_max_length-1, 1907 " (Possible cause: can't load this .so (machine code=0x%x) on a %s-bit platform)", 1908 lib_arch.code, 1909 arch_array[running_arch_index].name); 1910 } 1911 } 1912 1913 return NULL; 1914} 1915 1916void* os::dll_lookup(void* handle, const char* name) { 1917 return dlsym(handle, name); 1918} 1919 1920void* os::get_default_process_handle() { 1921 return (void*)::dlopen(NULL, RTLD_LAZY); 1922} 1923 1924int os::stat(const char *path, struct stat *sbuf) { 1925 char pathbuf[MAX_PATH]; 1926 if (strlen(path) > MAX_PATH - 1) { 1927 errno = ENAMETOOLONG; 1928 return -1; 1929 } 1930 os::native_path(strcpy(pathbuf, path)); 1931 return ::stat(pathbuf, sbuf); 1932} 1933 1934static bool _print_ascii_file(const char* filename, outputStream* st) { 1935 int fd = ::open(filename, O_RDONLY); 1936 if (fd == -1) { 1937 return false; 1938 } 1939 1940 char buf[32]; 1941 int bytes; 1942 while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) { 1943 st->print_raw(buf, bytes); 1944 } 1945 1946 ::close(fd); 1947 1948 return true; 1949} 1950 1951void os::print_os_info_brief(outputStream* st) { 1952 os::Solaris::print_distro_info(st); 1953 1954 os::Posix::print_uname_info(st); 1955 1956 os::Solaris::print_libversion_info(st); 1957} 1958 1959void os::print_os_info(outputStream* st) { 1960 st->print("OS:"); 1961 1962 os::Solaris::print_distro_info(st); 1963 1964 os::Posix::print_uname_info(st); 1965 1966 os::Solaris::print_libversion_info(st); 1967 1968 os::Posix::print_rlimit_info(st); 1969 1970 os::Posix::print_load_average(st); 1971} 1972 1973void os::Solaris::print_distro_info(outputStream* st) { 1974 if (!_print_ascii_file("/etc/release", st)) { 1975 st->print("Solaris"); 1976 } 1977 st->cr(); 1978} 1979 1980void os::Solaris::print_libversion_info(outputStream* st) { 1981 st->print(" (T2 libthread)"); 1982 st->cr(); 1983} 1984 1985static bool check_addr0(outputStream* st) { 1986 jboolean status = false; 1987 int fd = ::open("/proc/self/map",O_RDONLY); 1988 if (fd >= 0) { 1989 prmap_t p; 1990 while (::read(fd, &p, sizeof(p)) > 0) { 1991 if (p.pr_vaddr == 0x0) { 1992 st->print("Warning: Address: 0x%x, Size: %dK, ",p.pr_vaddr, p.pr_size/1024, p.pr_mapname); 1993 st->print("Mapped file: %s, ", p.pr_mapname[0] == '\0' ? "None" : p.pr_mapname); 1994 st->print("Access:"); 1995 st->print("%s",(p.pr_mflags & MA_READ) ? "r" : "-"); 1996 st->print("%s",(p.pr_mflags & MA_WRITE) ? "w" : "-"); 1997 st->print("%s",(p.pr_mflags & MA_EXEC) ? "x" : "-"); 1998 st->cr(); 1999 status = true; 2000 } 2001 } 2002 ::close(fd); 2003 } 2004 return status; 2005} 2006 2007void os::pd_print_cpu_info(outputStream* st) { 2008 // Nothing to do for now. 2009} 2010 2011void os::print_memory_info(outputStream* st) { 2012 st->print("Memory:"); 2013 st->print(" %dk page", os::vm_page_size()>>10); 2014 st->print(", physical " UINT64_FORMAT "k", os::physical_memory()>>10); 2015 st->print("(" UINT64_FORMAT "k free)", os::available_memory() >> 10); 2016 st->cr(); 2017 (void) check_addr0(st); 2018} 2019 2020void os::print_siginfo(outputStream* st, void* siginfo) { 2021 const siginfo_t* si = (const siginfo_t*)siginfo; 2022 2023 os::Posix::print_siginfo_brief(st, si); 2024 2025 if (si && (si->si_signo == SIGBUS || si->si_signo == SIGSEGV) && 2026 UseSharedSpaces) { 2027 FileMapInfo* mapinfo = FileMapInfo::current_info(); 2028 if (mapinfo->is_in_shared_space(si->si_addr)) { 2029 st->print("\n\nError accessing class data sharing archive." \ 2030 " Mapped file inaccessible during execution, " \ 2031 " possible disk/network problem."); 2032 } 2033 } 2034 st->cr(); 2035} 2036 2037// Moved from whole group, because we need them here for diagnostic 2038// prints. 2039#define OLDMAXSIGNUM 32 2040static int Maxsignum = 0; 2041static int *ourSigFlags = NULL; 2042 2043extern "C" void sigINTRHandler(int, siginfo_t*, void*); 2044 2045int os::Solaris::get_our_sigflags(int sig) { 2046 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2047 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2048 return ourSigFlags[sig]; 2049} 2050 2051void os::Solaris::set_our_sigflags(int sig, int flags) { 2052 assert(ourSigFlags!=NULL, "signal data structure not initialized"); 2053 assert(sig > 0 && sig < Maxsignum, "vm signal out of expected range"); 2054 ourSigFlags[sig] = flags; 2055} 2056 2057 2058static const char* get_signal_handler_name(address handler, 2059 char* buf, int buflen) { 2060 int offset; 2061 bool found = os::dll_address_to_library_name(handler, buf, buflen, &offset); 2062 if (found) { 2063 // skip directory names 2064 const char *p1, *p2; 2065 p1 = buf; 2066 size_t len = strlen(os::file_separator()); 2067 while ((p2 = strstr(p1, os::file_separator())) != NULL) p1 = p2 + len; 2068 jio_snprintf(buf, buflen, "%s+0x%x", p1, offset); 2069 } else { 2070 jio_snprintf(buf, buflen, PTR_FORMAT, handler); 2071 } 2072 return buf; 2073} 2074 2075static void print_signal_handler(outputStream* st, int sig, 2076 char* buf, size_t buflen) { 2077 struct sigaction sa; 2078 2079 sigaction(sig, NULL, &sa); 2080 2081 st->print("%s: ", os::exception_name(sig, buf, buflen)); 2082 2083 address handler = (sa.sa_flags & SA_SIGINFO) 2084 ? CAST_FROM_FN_PTR(address, sa.sa_sigaction) 2085 : CAST_FROM_FN_PTR(address, sa.sa_handler); 2086 2087 if (handler == CAST_FROM_FN_PTR(address, SIG_DFL)) { 2088 st->print("SIG_DFL"); 2089 } else if (handler == CAST_FROM_FN_PTR(address, SIG_IGN)) { 2090 st->print("SIG_IGN"); 2091 } else { 2092 st->print("[%s]", get_signal_handler_name(handler, buf, buflen)); 2093 } 2094 2095 st->print(", sa_mask[0]="); 2096 os::Posix::print_signal_set_short(st, &sa.sa_mask); 2097 2098 address rh = VMError::get_resetted_sighandler(sig); 2099 // May be, handler was resetted by VMError? 2100 if (rh != NULL) { 2101 handler = rh; 2102 sa.sa_flags = VMError::get_resetted_sigflags(sig); 2103 } 2104 2105 st->print(", sa_flags="); 2106 os::Posix::print_sa_flags(st, sa.sa_flags); 2107 2108 // Check: is it our handler? 2109 if (handler == CAST_FROM_FN_PTR(address, signalHandler) || 2110 handler == CAST_FROM_FN_PTR(address, sigINTRHandler)) { 2111 // It is our signal handler 2112 // check for flags 2113 if (sa.sa_flags != os::Solaris::get_our_sigflags(sig)) { 2114 st->print( 2115 ", flags was changed from " PTR32_FORMAT ", consider using jsig library", 2116 os::Solaris::get_our_sigflags(sig)); 2117 } 2118 } 2119 st->cr(); 2120} 2121 2122void os::print_signal_handlers(outputStream* st, char* buf, size_t buflen) { 2123 st->print_cr("Signal Handlers:"); 2124 print_signal_handler(st, SIGSEGV, buf, buflen); 2125 print_signal_handler(st, SIGBUS , buf, buflen); 2126 print_signal_handler(st, SIGFPE , buf, buflen); 2127 print_signal_handler(st, SIGPIPE, buf, buflen); 2128 print_signal_handler(st, SIGXFSZ, buf, buflen); 2129 print_signal_handler(st, SIGILL , buf, buflen); 2130 print_signal_handler(st, INTERRUPT_SIGNAL, buf, buflen); 2131 print_signal_handler(st, ASYNC_SIGNAL, buf, buflen); 2132 print_signal_handler(st, BREAK_SIGNAL, buf, buflen); 2133 print_signal_handler(st, SHUTDOWN1_SIGNAL , buf, buflen); 2134 print_signal_handler(st, SHUTDOWN2_SIGNAL , buf, buflen); 2135 print_signal_handler(st, SHUTDOWN3_SIGNAL, buf, buflen); 2136 print_signal_handler(st, os::Solaris::SIGinterrupt(), buf, buflen); 2137 print_signal_handler(st, os::Solaris::SIGasync(), buf, buflen); 2138} 2139 2140static char saved_jvm_path[MAXPATHLEN] = { 0 }; 2141 2142// Find the full path to the current module, libjvm.so 2143void os::jvm_path(char *buf, jint buflen) { 2144 // Error checking. 2145 if (buflen < MAXPATHLEN) { 2146 assert(false, "must use a large-enough buffer"); 2147 buf[0] = '\0'; 2148 return; 2149 } 2150 // Lazy resolve the path to current module. 2151 if (saved_jvm_path[0] != 0) { 2152 strcpy(buf, saved_jvm_path); 2153 return; 2154 } 2155 2156 Dl_info dlinfo; 2157 int ret = dladdr(CAST_FROM_FN_PTR(void *, os::jvm_path), &dlinfo); 2158 assert(ret != 0, "cannot locate libjvm"); 2159 if (ret != 0 && dlinfo.dli_fname != NULL) { 2160 realpath((char *)dlinfo.dli_fname, buf); 2161 } else { 2162 buf[0] = '\0'; 2163 return; 2164 } 2165 2166 if (Arguments::sun_java_launcher_is_altjvm()) { 2167 // Support for the java launcher's '-XXaltjvm=<path>' option. Typical 2168 // value for buf is "<JAVA_HOME>/jre/lib/<arch>/<vmtype>/libjvm.so". 2169 // If "/jre/lib/" appears at the right place in the string, then 2170 // assume we are installed in a JDK and we're done. Otherwise, check 2171 // for a JAVA_HOME environment variable and fix up the path so it 2172 // looks like libjvm.so is installed there (append a fake suffix 2173 // hotspot/libjvm.so). 2174 const char *p = buf + strlen(buf) - 1; 2175 for (int count = 0; p > buf && count < 5; ++count) { 2176 for (--p; p > buf && *p != '/'; --p) 2177 /* empty */ ; 2178 } 2179 2180 if (strncmp(p, "/jre/lib/", 9) != 0) { 2181 // Look for JAVA_HOME in the environment. 2182 char* java_home_var = ::getenv("JAVA_HOME"); 2183 if (java_home_var != NULL && java_home_var[0] != 0) { 2184 char cpu_arch[12]; 2185 char* jrelib_p; 2186 int len; 2187 sysinfo(SI_ARCHITECTURE, cpu_arch, sizeof(cpu_arch)); 2188#ifdef _LP64 2189 // If we are on sparc running a 64-bit vm, look in jre/lib/sparcv9. 2190 if (strcmp(cpu_arch, "sparc") == 0) { 2191 strcat(cpu_arch, "v9"); 2192 } else if (strcmp(cpu_arch, "i386") == 0) { 2193 strcpy(cpu_arch, "amd64"); 2194 } 2195#endif 2196 // Check the current module name "libjvm.so". 2197 p = strrchr(buf, '/'); 2198 assert(strstr(p, "/libjvm") == p, "invalid library name"); 2199 2200 realpath(java_home_var, buf); 2201 // determine if this is a legacy image or modules image 2202 // modules image doesn't have "jre" subdirectory 2203 len = strlen(buf); 2204 assert(len < buflen, "Ran out of buffer space"); 2205 jrelib_p = buf + len; 2206 snprintf(jrelib_p, buflen-len, "/jre/lib/%s", cpu_arch); 2207 if (0 != access(buf, F_OK)) { 2208 snprintf(jrelib_p, buflen-len, "/lib/%s", cpu_arch); 2209 } 2210 2211 if (0 == access(buf, F_OK)) { 2212 // Use current module name "libjvm.so" 2213 len = strlen(buf); 2214 snprintf(buf + len, buflen-len, "/hotspot/libjvm.so"); 2215 } else { 2216 // Go back to path of .so 2217 realpath((char *)dlinfo.dli_fname, buf); 2218 } 2219 } 2220 } 2221 } 2222 2223 strncpy(saved_jvm_path, buf, MAXPATHLEN); 2224} 2225 2226 2227void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2228 // no prefix required, not even "_" 2229} 2230 2231 2232void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2233 // no suffix required 2234} 2235 2236// This method is a copy of JDK's sysGetLastErrorString 2237// from src/solaris/hpi/src/system_md.c 2238 2239size_t os::lasterror(char *buf, size_t len) { 2240 if (errno == 0) return 0; 2241 2242 const char *s = ::strerror(errno); 2243 size_t n = ::strlen(s); 2244 if (n >= len) { 2245 n = len - 1; 2246 } 2247 ::strncpy(buf, s, n); 2248 buf[n] = '\0'; 2249 return n; 2250} 2251 2252 2253// sun.misc.Signal 2254 2255extern "C" { 2256 static void UserHandler(int sig, void *siginfo, void *context) { 2257 // Ctrl-C is pressed during error reporting, likely because the error 2258 // handler fails to abort. Let VM die immediately. 2259 if (sig == SIGINT && is_error_reported()) { 2260 os::die(); 2261 } 2262 2263 os::signal_notify(sig); 2264 // We do not need to reinstate the signal handler each time... 2265 } 2266} 2267 2268void* os::user_handler() { 2269 return CAST_FROM_FN_PTR(void*, UserHandler); 2270} 2271 2272class Semaphore : public StackObj { 2273 public: 2274 Semaphore(); 2275 ~Semaphore(); 2276 void signal(); 2277 void wait(); 2278 bool trywait(); 2279 bool timedwait(unsigned int sec, int nsec); 2280 private: 2281 sema_t _semaphore; 2282}; 2283 2284 2285Semaphore::Semaphore() { 2286 sema_init(&_semaphore, 0, NULL, NULL); 2287} 2288 2289Semaphore::~Semaphore() { 2290 sema_destroy(&_semaphore); 2291} 2292 2293void Semaphore::signal() { 2294 sema_post(&_semaphore); 2295} 2296 2297void Semaphore::wait() { 2298 sema_wait(&_semaphore); 2299} 2300 2301bool Semaphore::trywait() { 2302 return sema_trywait(&_semaphore) == 0; 2303} 2304 2305bool Semaphore::timedwait(unsigned int sec, int nsec) { 2306 struct timespec ts; 2307 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2308 2309 while (1) { 2310 int result = sema_timedwait(&_semaphore, &ts); 2311 if (result == 0) { 2312 return true; 2313 } else if (errno == EINTR) { 2314 continue; 2315 } else if (errno == ETIME) { 2316 return false; 2317 } else { 2318 return false; 2319 } 2320 } 2321} 2322 2323extern "C" { 2324 typedef void (*sa_handler_t)(int); 2325 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2326} 2327 2328void* os::signal(int signal_number, void* handler) { 2329 struct sigaction sigAct, oldSigAct; 2330 sigfillset(&(sigAct.sa_mask)); 2331 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2332 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2333 2334 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2335 // -1 means registration failed 2336 return (void *)-1; 2337 } 2338 2339 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2340} 2341 2342void os::signal_raise(int signal_number) { 2343 raise(signal_number); 2344} 2345 2346// The following code is moved from os.cpp for making this 2347// code platform specific, which it is by its very nature. 2348 2349// a counter for each possible signal value 2350static int Sigexit = 0; 2351static int Maxlibjsigsigs; 2352static jint *pending_signals = NULL; 2353static int *preinstalled_sigs = NULL; 2354static struct sigaction *chainedsigactions = NULL; 2355static sema_t sig_sem; 2356typedef int (*version_getting_t)(); 2357version_getting_t os::Solaris::get_libjsig_version = NULL; 2358static int libjsigversion = NULL; 2359 2360int os::sigexitnum_pd() { 2361 assert(Sigexit > 0, "signal memory not yet initialized"); 2362 return Sigexit; 2363} 2364 2365void os::Solaris::init_signal_mem() { 2366 // Initialize signal structures 2367 Maxsignum = SIGRTMAX; 2368 Sigexit = Maxsignum+1; 2369 assert(Maxsignum >0, "Unable to obtain max signal number"); 2370 2371 Maxlibjsigsigs = Maxsignum; 2372 2373 // pending_signals has one int per signal 2374 // The additional signal is for SIGEXIT - exit signal to signal_thread 2375 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2376 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2377 2378 if (UseSignalChaining) { 2379 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2380 * (Maxsignum + 1), mtInternal); 2381 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2382 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2383 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2384 } 2385 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2386 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2387} 2388 2389void os::signal_init_pd() { 2390 int ret; 2391 2392 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2393 assert(ret == 0, "sema_init() failed"); 2394} 2395 2396void os::signal_notify(int signal_number) { 2397 int ret; 2398 2399 Atomic::inc(&pending_signals[signal_number]); 2400 ret = ::sema_post(&sig_sem); 2401 assert(ret == 0, "sema_post() failed"); 2402} 2403 2404static int check_pending_signals(bool wait_for_signal) { 2405 int ret; 2406 while (true) { 2407 for (int i = 0; i < Sigexit + 1; i++) { 2408 jint n = pending_signals[i]; 2409 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2410 return i; 2411 } 2412 } 2413 if (!wait_for_signal) { 2414 return -1; 2415 } 2416 JavaThread *thread = JavaThread::current(); 2417 ThreadBlockInVM tbivm(thread); 2418 2419 bool threadIsSuspended; 2420 do { 2421 thread->set_suspend_equivalent(); 2422 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2423 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2424 ; 2425 assert(ret == 0, "sema_wait() failed"); 2426 2427 // were we externally suspended while we were waiting? 2428 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2429 if (threadIsSuspended) { 2430 // The semaphore has been incremented, but while we were waiting 2431 // another thread suspended us. We don't want to continue running 2432 // while suspended because that would surprise the thread that 2433 // suspended us. 2434 ret = ::sema_post(&sig_sem); 2435 assert(ret == 0, "sema_post() failed"); 2436 2437 thread->java_suspend_self(); 2438 } 2439 } while (threadIsSuspended); 2440 } 2441} 2442 2443int os::signal_lookup() { 2444 return check_pending_signals(false); 2445} 2446 2447int os::signal_wait() { 2448 return check_pending_signals(true); 2449} 2450 2451//////////////////////////////////////////////////////////////////////////////// 2452// Virtual Memory 2453 2454static int page_size = -1; 2455 2456// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2457// clear this var if support is not available. 2458static bool has_map_align = true; 2459 2460int os::vm_page_size() { 2461 assert(page_size != -1, "must call os::init"); 2462 return page_size; 2463} 2464 2465// Solaris allocates memory by pages. 2466int os::vm_allocation_granularity() { 2467 assert(page_size != -1, "must call os::init"); 2468 return page_size; 2469} 2470 2471static bool recoverable_mmap_error(int err) { 2472 // See if the error is one we can let the caller handle. This 2473 // list of errno values comes from the Solaris mmap(2) man page. 2474 switch (err) { 2475 case EBADF: 2476 case EINVAL: 2477 case ENOTSUP: 2478 // let the caller deal with these errors 2479 return true; 2480 2481 default: 2482 // Any remaining errors on this OS can cause our reserved mapping 2483 // to be lost. That can cause confusion where different data 2484 // structures think they have the same memory mapped. The worst 2485 // scenario is if both the VM and a library think they have the 2486 // same memory mapped. 2487 return false; 2488 } 2489} 2490 2491static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2492 int err) { 2493 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2494 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2495 strerror(err), err); 2496} 2497 2498static void warn_fail_commit_memory(char* addr, size_t bytes, 2499 size_t alignment_hint, bool exec, 2500 int err) { 2501 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2502 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2503 alignment_hint, exec, strerror(err), err); 2504} 2505 2506int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2507 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2508 size_t size = bytes; 2509 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2510 if (res != NULL) { 2511 if (UseNUMAInterleaving) { 2512 numa_make_global(addr, bytes); 2513 } 2514 return 0; 2515 } 2516 2517 int err = errno; // save errno from mmap() call in mmap_chunk() 2518 2519 if (!recoverable_mmap_error(err)) { 2520 warn_fail_commit_memory(addr, bytes, exec, err); 2521 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2522 } 2523 2524 return err; 2525} 2526 2527bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2528 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2529} 2530 2531void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2532 const char* mesg) { 2533 assert(mesg != NULL, "mesg must be specified"); 2534 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2535 if (err != 0) { 2536 // the caller wants all commit errors to exit with the specified mesg: 2537 warn_fail_commit_memory(addr, bytes, exec, err); 2538 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2539 } 2540} 2541 2542size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2543 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2544 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2545 alignment, (size_t) vm_page_size())); 2546 2547 for (int i = 0; _page_sizes[i] != 0; i++) { 2548 if (is_size_aligned(alignment, _page_sizes[i])) { 2549 return _page_sizes[i]; 2550 } 2551 } 2552 2553 return (size_t) vm_page_size(); 2554} 2555 2556int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2557 size_t alignment_hint, bool exec) { 2558 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2559 if (err == 0 && UseLargePages && alignment_hint > 0) { 2560 assert(is_size_aligned(bytes, alignment_hint), 2561 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint)); 2562 2563 // The syscall memcntl requires an exact page size (see man memcntl for details). 2564 size_t page_size = page_size_for_alignment(alignment_hint); 2565 if (page_size > (size_t) vm_page_size()) { 2566 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2567 } 2568 } 2569 return err; 2570} 2571 2572bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2573 bool exec) { 2574 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2575} 2576 2577void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2578 size_t alignment_hint, bool exec, 2579 const char* mesg) { 2580 assert(mesg != NULL, "mesg must be specified"); 2581 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2582 if (err != 0) { 2583 // the caller wants all commit errors to exit with the specified mesg: 2584 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2585 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2586 } 2587} 2588 2589// Uncommit the pages in a specified region. 2590void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2591 if (madvise(addr, bytes, MADV_FREE) < 0) { 2592 debug_only(warning("MADV_FREE failed.")); 2593 return; 2594 } 2595} 2596 2597bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2598 return os::commit_memory(addr, size, !ExecMem); 2599} 2600 2601bool os::remove_stack_guard_pages(char* addr, size_t size) { 2602 return os::uncommit_memory(addr, size); 2603} 2604 2605// Change the page size in a given range. 2606void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2607 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2608 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2609 if (UseLargePages) { 2610 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2611 if (page_size > (size_t) vm_page_size()) { 2612 Solaris::setup_large_pages(addr, bytes, page_size); 2613 } 2614 } 2615} 2616 2617// Tell the OS to make the range local to the first-touching LWP 2618void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2619 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2620 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2621 debug_only(warning("MADV_ACCESS_LWP failed.")); 2622 } 2623} 2624 2625// Tell the OS that this range would be accessed from different LWPs. 2626void os::numa_make_global(char *addr, size_t bytes) { 2627 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2628 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2629 debug_only(warning("MADV_ACCESS_MANY failed.")); 2630 } 2631} 2632 2633// Get the number of the locality groups. 2634size_t os::numa_get_groups_num() { 2635 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2636 return n != -1 ? n : 1; 2637} 2638 2639// Get a list of leaf locality groups. A leaf lgroup is group that 2640// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2641// board. An LWP is assigned to one of these groups upon creation. 2642size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2643 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2644 ids[0] = 0; 2645 return 1; 2646 } 2647 int result_size = 0, top = 1, bottom = 0, cur = 0; 2648 for (int k = 0; k < size; k++) { 2649 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2650 (Solaris::lgrp_id_t*)&ids[top], size - top); 2651 if (r == -1) { 2652 ids[0] = 0; 2653 return 1; 2654 } 2655 if (!r) { 2656 // That's a leaf node. 2657 assert(bottom <= cur, "Sanity check"); 2658 // Check if the node has memory 2659 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2660 NULL, 0, LGRP_RSRC_MEM) > 0) { 2661 ids[bottom++] = ids[cur]; 2662 } 2663 } 2664 top += r; 2665 cur++; 2666 } 2667 if (bottom == 0) { 2668 // Handle a situation, when the OS reports no memory available. 2669 // Assume UMA architecture. 2670 ids[0] = 0; 2671 return 1; 2672 } 2673 return bottom; 2674} 2675 2676// Detect the topology change. Typically happens during CPU plugging-unplugging. 2677bool os::numa_topology_changed() { 2678 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2679 if (is_stale != -1 && is_stale) { 2680 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2681 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2682 assert(c != 0, "Failure to initialize LGRP API"); 2683 Solaris::set_lgrp_cookie(c); 2684 return true; 2685 } 2686 return false; 2687} 2688 2689// Get the group id of the current LWP. 2690int os::numa_get_group_id() { 2691 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2692 if (lgrp_id == -1) { 2693 return 0; 2694 } 2695 const int size = os::numa_get_groups_num(); 2696 int *ids = (int*)alloca(size * sizeof(int)); 2697 2698 // Get the ids of all lgroups with memory; r is the count. 2699 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2700 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2701 if (r <= 0) { 2702 return 0; 2703 } 2704 return ids[os::random() % r]; 2705} 2706 2707// Request information about the page. 2708bool os::get_page_info(char *start, page_info* info) { 2709 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2710 uint64_t addr = (uintptr_t)start; 2711 uint64_t outdata[2]; 2712 uint_t validity = 0; 2713 2714 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2715 return false; 2716 } 2717 2718 info->size = 0; 2719 info->lgrp_id = -1; 2720 2721 if ((validity & 1) != 0) { 2722 if ((validity & 2) != 0) { 2723 info->lgrp_id = outdata[0]; 2724 } 2725 if ((validity & 4) != 0) { 2726 info->size = outdata[1]; 2727 } 2728 return true; 2729 } 2730 return false; 2731} 2732 2733// Scan the pages from start to end until a page different than 2734// the one described in the info parameter is encountered. 2735char *os::scan_pages(char *start, char* end, page_info* page_expected, 2736 page_info* page_found) { 2737 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2738 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2739 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2740 uint_t validity[MAX_MEMINFO_CNT]; 2741 2742 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2743 uint64_t p = (uint64_t)start; 2744 while (p < (uint64_t)end) { 2745 addrs[0] = p; 2746 size_t addrs_count = 1; 2747 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2748 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2749 addrs_count++; 2750 } 2751 2752 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2753 return NULL; 2754 } 2755 2756 size_t i = 0; 2757 for (; i < addrs_count; i++) { 2758 if ((validity[i] & 1) != 0) { 2759 if ((validity[i] & 4) != 0) { 2760 if (outdata[types * i + 1] != page_expected->size) { 2761 break; 2762 } 2763 } else if (page_expected->size != 0) { 2764 break; 2765 } 2766 2767 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2768 if (outdata[types * i] != page_expected->lgrp_id) { 2769 break; 2770 } 2771 } 2772 } else { 2773 return NULL; 2774 } 2775 } 2776 2777 if (i < addrs_count) { 2778 if ((validity[i] & 2) != 0) { 2779 page_found->lgrp_id = outdata[types * i]; 2780 } else { 2781 page_found->lgrp_id = -1; 2782 } 2783 if ((validity[i] & 4) != 0) { 2784 page_found->size = outdata[types * i + 1]; 2785 } else { 2786 page_found->size = 0; 2787 } 2788 return (char*)addrs[i]; 2789 } 2790 2791 p = addrs[addrs_count - 1] + page_size; 2792 } 2793 return end; 2794} 2795 2796bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2797 size_t size = bytes; 2798 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2799 // uncommitted page. Otherwise, the read/write might succeed if we 2800 // have enough swap space to back the physical page. 2801 return 2802 NULL != Solaris::mmap_chunk(addr, size, 2803 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2804 PROT_NONE); 2805} 2806 2807char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2808 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2809 2810 if (b == MAP_FAILED) { 2811 return NULL; 2812 } 2813 return b; 2814} 2815 2816char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2817 size_t alignment_hint, bool fixed) { 2818 char* addr = requested_addr; 2819 int flags = MAP_PRIVATE | MAP_NORESERVE; 2820 2821 assert(!(fixed && (alignment_hint > 0)), 2822 "alignment hint meaningless with fixed mmap"); 2823 2824 if (fixed) { 2825 flags |= MAP_FIXED; 2826 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2827 flags |= MAP_ALIGN; 2828 addr = (char*) alignment_hint; 2829 } 2830 2831 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2832 // uncommitted page. Otherwise, the read/write might succeed if we 2833 // have enough swap space to back the physical page. 2834 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2835} 2836 2837char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2838 size_t alignment_hint) { 2839 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2840 (requested_addr != NULL)); 2841 2842 guarantee(requested_addr == NULL || requested_addr == addr, 2843 "OS failed to return requested mmap address."); 2844 return addr; 2845} 2846 2847// Reserve memory at an arbitrary address, only if that area is 2848// available (and not reserved for something else). 2849 2850char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2851 const int max_tries = 10; 2852 char* base[max_tries]; 2853 size_t size[max_tries]; 2854 2855 // Solaris adds a gap between mmap'ed regions. The size of the gap 2856 // is dependent on the requested size and the MMU. Our initial gap 2857 // value here is just a guess and will be corrected later. 2858 bool had_top_overlap = false; 2859 bool have_adjusted_gap = false; 2860 size_t gap = 0x400000; 2861 2862 // Assert only that the size is a multiple of the page size, since 2863 // that's all that mmap requires, and since that's all we really know 2864 // about at this low abstraction level. If we need higher alignment, 2865 // we can either pass an alignment to this method or verify alignment 2866 // in one of the methods further up the call chain. See bug 5044738. 2867 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2868 2869 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2870 // Give it a try, if the kernel honors the hint we can return immediately. 2871 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2872 2873 volatile int err = errno; 2874 if (addr == requested_addr) { 2875 return addr; 2876 } else if (addr != NULL) { 2877 pd_unmap_memory(addr, bytes); 2878 } 2879 2880 if (PrintMiscellaneous && Verbose) { 2881 char buf[256]; 2882 buf[0] = '\0'; 2883 if (addr == NULL) { 2884 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2885 } 2886 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2887 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2888 "%s", bytes, requested_addr, addr, buf); 2889 } 2890 2891 // Address hint method didn't work. Fall back to the old method. 2892 // In theory, once SNV becomes our oldest supported platform, this 2893 // code will no longer be needed. 2894 // 2895 // Repeatedly allocate blocks until the block is allocated at the 2896 // right spot. Give up after max_tries. 2897 int i; 2898 for (i = 0; i < max_tries; ++i) { 2899 base[i] = reserve_memory(bytes); 2900 2901 if (base[i] != NULL) { 2902 // Is this the block we wanted? 2903 if (base[i] == requested_addr) { 2904 size[i] = bytes; 2905 break; 2906 } 2907 2908 // check that the gap value is right 2909 if (had_top_overlap && !have_adjusted_gap) { 2910 size_t actual_gap = base[i-1] - base[i] - bytes; 2911 if (gap != actual_gap) { 2912 // adjust the gap value and retry the last 2 allocations 2913 assert(i > 0, "gap adjustment code problem"); 2914 have_adjusted_gap = true; // adjust the gap only once, just in case 2915 gap = actual_gap; 2916 if (PrintMiscellaneous && Verbose) { 2917 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2918 } 2919 unmap_memory(base[i], bytes); 2920 unmap_memory(base[i-1], size[i-1]); 2921 i-=2; 2922 continue; 2923 } 2924 } 2925 2926 // Does this overlap the block we wanted? Give back the overlapped 2927 // parts and try again. 2928 // 2929 // There is still a bug in this code: if top_overlap == bytes, 2930 // the overlap is offset from requested region by the value of gap. 2931 // In this case giving back the overlapped part will not work, 2932 // because we'll give back the entire block at base[i] and 2933 // therefore the subsequent allocation will not generate a new gap. 2934 // This could be fixed with a new algorithm that used larger 2935 // or variable size chunks to find the requested region - 2936 // but such a change would introduce additional complications. 2937 // It's rare enough that the planets align for this bug, 2938 // so we'll just wait for a fix for 6204603/5003415 which 2939 // will provide a mmap flag to allow us to avoid this business. 2940 2941 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2942 if (top_overlap >= 0 && top_overlap < bytes) { 2943 had_top_overlap = true; 2944 unmap_memory(base[i], top_overlap); 2945 base[i] += top_overlap; 2946 size[i] = bytes - top_overlap; 2947 } else { 2948 size_t bottom_overlap = base[i] + bytes - requested_addr; 2949 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2950 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2951 warning("attempt_reserve_memory_at: possible alignment bug"); 2952 } 2953 unmap_memory(requested_addr, bottom_overlap); 2954 size[i] = bytes - bottom_overlap; 2955 } else { 2956 size[i] = bytes; 2957 } 2958 } 2959 } 2960 } 2961 2962 // Give back the unused reserved pieces. 2963 2964 for (int j = 0; j < i; ++j) { 2965 if (base[j] != NULL) { 2966 unmap_memory(base[j], size[j]); 2967 } 2968 } 2969 2970 return (i < max_tries) ? requested_addr : NULL; 2971} 2972 2973bool os::pd_release_memory(char* addr, size_t bytes) { 2974 size_t size = bytes; 2975 return munmap(addr, size) == 0; 2976} 2977 2978static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2979 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2980 "addr must be page aligned"); 2981 int retVal = mprotect(addr, bytes, prot); 2982 return retVal == 0; 2983} 2984 2985// Protect memory (Used to pass readonly pages through 2986// JNI GetArray<type>Elements with empty arrays.) 2987// Also, used for serialization page and for compressed oops null pointer 2988// checking. 2989bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2990 bool is_committed) { 2991 unsigned int p = 0; 2992 switch (prot) { 2993 case MEM_PROT_NONE: p = PROT_NONE; break; 2994 case MEM_PROT_READ: p = PROT_READ; break; 2995 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2996 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2997 default: 2998 ShouldNotReachHere(); 2999 } 3000 // is_committed is unused. 3001 return solaris_mprotect(addr, bytes, p); 3002} 3003 3004// guard_memory and unguard_memory only happens within stack guard pages. 3005// Since ISM pertains only to the heap, guard and unguard memory should not 3006/// happen with an ISM region. 3007bool os::guard_memory(char* addr, size_t bytes) { 3008 return solaris_mprotect(addr, bytes, PROT_NONE); 3009} 3010 3011bool os::unguard_memory(char* addr, size_t bytes) { 3012 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3013} 3014 3015// Large page support 3016static size_t _large_page_size = 0; 3017 3018// Insertion sort for small arrays (descending order). 3019static void insertion_sort_descending(size_t* array, int len) { 3020 for (int i = 0; i < len; i++) { 3021 size_t val = array[i]; 3022 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3023 size_t tmp = array[key]; 3024 array[key] = array[key - 1]; 3025 array[key - 1] = tmp; 3026 } 3027 } 3028} 3029 3030bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 3031 const unsigned int usable_count = VM_Version::page_size_count(); 3032 if (usable_count == 1) { 3033 return false; 3034 } 3035 3036 // Find the right getpagesizes interface. When solaris 11 is the minimum 3037 // build platform, getpagesizes() (without the '2') can be called directly. 3038 typedef int (*gps_t)(size_t[], int); 3039 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3040 if (gps_func == NULL) { 3041 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3042 if (gps_func == NULL) { 3043 if (warn) { 3044 warning("MPSS is not supported by the operating system."); 3045 } 3046 return false; 3047 } 3048 } 3049 3050 // Fill the array of page sizes. 3051 int n = (*gps_func)(_page_sizes, page_sizes_max); 3052 assert(n > 0, "Solaris bug?"); 3053 3054 if (n == page_sizes_max) { 3055 // Add a sentinel value (necessary only if the array was completely filled 3056 // since it is static (zeroed at initialization)). 3057 _page_sizes[--n] = 0; 3058 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3059 } 3060 assert(_page_sizes[n] == 0, "missing sentinel"); 3061 trace_page_sizes("available page sizes", _page_sizes, n); 3062 3063 if (n == 1) return false; // Only one page size available. 3064 3065 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3066 // select up to usable_count elements. First sort the array, find the first 3067 // acceptable value, then copy the usable sizes to the top of the array and 3068 // trim the rest. Make sure to include the default page size :-). 3069 // 3070 // A better policy could get rid of the 4M limit by taking the sizes of the 3071 // important VM memory regions (java heap and possibly the code cache) into 3072 // account. 3073 insertion_sort_descending(_page_sizes, n); 3074 const size_t size_limit = 3075 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3076 int beg; 3077 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 3078 const int end = MIN2((int)usable_count, n) - 1; 3079 for (int cur = 0; cur < end; ++cur, ++beg) { 3080 _page_sizes[cur] = _page_sizes[beg]; 3081 } 3082 _page_sizes[end] = vm_page_size(); 3083 _page_sizes[end + 1] = 0; 3084 3085 if (_page_sizes[end] > _page_sizes[end - 1]) { 3086 // Default page size is not the smallest; sort again. 3087 insertion_sort_descending(_page_sizes, end + 1); 3088 } 3089 *page_size = _page_sizes[0]; 3090 3091 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3092 return true; 3093} 3094 3095void os::large_page_init() { 3096 if (UseLargePages) { 3097 // print a warning if any large page related flag is specified on command line 3098 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3099 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3100 3101 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3102 } 3103} 3104 3105bool os::Solaris::is_valid_page_size(size_t bytes) { 3106 for (int i = 0; _page_sizes[i] != 0; i++) { 3107 if (_page_sizes[i] == bytes) { 3108 return true; 3109 } 3110 } 3111 return false; 3112} 3113 3114bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 3115 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align)); 3116 assert(is_ptr_aligned((void*) start, align), 3117 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align)); 3118 assert(is_size_aligned(bytes, align), 3119 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align)); 3120 3121 // Signal to OS that we want large pages for addresses 3122 // from addr, addr + bytes 3123 struct memcntl_mha mpss_struct; 3124 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3125 mpss_struct.mha_pagesize = align; 3126 mpss_struct.mha_flags = 0; 3127 // Upon successful completion, memcntl() returns 0 3128 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3129 debug_only(warning("Attempt to use MPSS failed.")); 3130 return false; 3131 } 3132 return true; 3133} 3134 3135char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3136 fatal("os::reserve_memory_special should not be called on Solaris."); 3137 return NULL; 3138} 3139 3140bool os::release_memory_special(char* base, size_t bytes) { 3141 fatal("os::release_memory_special should not be called on Solaris."); 3142 return false; 3143} 3144 3145size_t os::large_page_size() { 3146 return _large_page_size; 3147} 3148 3149// MPSS allows application to commit large page memory on demand; with ISM 3150// the entire memory region must be allocated as shared memory. 3151bool os::can_commit_large_page_memory() { 3152 return true; 3153} 3154 3155bool os::can_execute_large_page_memory() { 3156 return true; 3157} 3158 3159// Read calls from inside the vm need to perform state transitions 3160size_t os::read(int fd, void *buf, unsigned int nBytes) { 3161 size_t res; 3162 JavaThread* thread = (JavaThread*)Thread::current(); 3163 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3164 ThreadBlockInVM tbiv(thread); 3165 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3166 return res; 3167} 3168 3169size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3170 size_t res; 3171 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3172 "Assumed _thread_in_native"); 3173 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3174 return res; 3175} 3176 3177void os::naked_short_sleep(jlong ms) { 3178 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3179 3180 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3181 // Solaris requires -lrt for this. 3182 usleep((ms * 1000)); 3183 3184 return; 3185} 3186 3187// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3188void os::infinite_sleep() { 3189 while (true) { // sleep forever ... 3190 ::sleep(100); // ... 100 seconds at a time 3191 } 3192} 3193 3194// Used to convert frequent JVM_Yield() to nops 3195bool os::dont_yield() { 3196 if (DontYieldALot) { 3197 static hrtime_t last_time = 0; 3198 hrtime_t diff = getTimeNanos() - last_time; 3199 3200 if (diff < DontYieldALotInterval * 1000000) { 3201 return true; 3202 } 3203 3204 last_time += diff; 3205 3206 return false; 3207 } else { 3208 return false; 3209 } 3210} 3211 3212// Note that yield semantics are defined by the scheduling class to which 3213// the thread currently belongs. Typically, yield will _not yield to 3214// other equal or higher priority threads that reside on the dispatch queues 3215// of other CPUs. 3216 3217void os::naked_yield() { 3218 thr_yield(); 3219} 3220 3221// Interface for setting lwp priorities. If we are using T2 libthread, 3222// which forces the use of BoundThreads or we manually set UseBoundThreads, 3223// all of our threads will be assigned to real lwp's. Using the thr_setprio 3224// function is meaningless in this mode so we must adjust the real lwp's priority 3225// The routines below implement the getting and setting of lwp priorities. 3226// 3227// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3228// being deprecated and all threads are now BoundThreads 3229// 3230// Note: There are three priority scales used on Solaris. Java priotities 3231// which range from 1 to 10, libthread "thr_setprio" scale which range 3232// from 0 to 127, and the current scheduling class of the process we 3233// are running in. This is typically from -60 to +60. 3234// The setting of the lwp priorities in done after a call to thr_setprio 3235// so Java priorities are mapped to libthread priorities and we map from 3236// the latter to lwp priorities. We don't keep priorities stored in 3237// Java priorities since some of our worker threads want to set priorities 3238// higher than all Java threads. 3239// 3240// For related information: 3241// (1) man -s 2 priocntl 3242// (2) man -s 4 priocntl 3243// (3) man dispadmin 3244// = librt.so 3245// = libthread/common/rtsched.c - thrp_setlwpprio(). 3246// = ps -cL <pid> ... to validate priority. 3247// = sched_get_priority_min and _max 3248// pthread_create 3249// sched_setparam 3250// pthread_setschedparam 3251// 3252// Assumptions: 3253// + We assume that all threads in the process belong to the same 3254// scheduling class. IE. an homogenous process. 3255// + Must be root or in IA group to change change "interactive" attribute. 3256// Priocntl() will fail silently. The only indication of failure is when 3257// we read-back the value and notice that it hasn't changed. 3258// + Interactive threads enter the runq at the head, non-interactive at the tail. 3259// + For RT, change timeslice as well. Invariant: 3260// constant "priority integral" 3261// Konst == TimeSlice * (60-Priority) 3262// Given a priority, compute appropriate timeslice. 3263// + Higher numerical values have higher priority. 3264 3265// sched class attributes 3266typedef struct { 3267 int schedPolicy; // classID 3268 int maxPrio; 3269 int minPrio; 3270} SchedInfo; 3271 3272 3273static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3274 3275#ifdef ASSERT 3276static int ReadBackValidate = 1; 3277#endif 3278static int myClass = 0; 3279static int myMin = 0; 3280static int myMax = 0; 3281static int myCur = 0; 3282static bool priocntl_enable = false; 3283 3284static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3285static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3286 3287 3288// lwp_priocntl_init 3289// 3290// Try to determine the priority scale for our process. 3291// 3292// Return errno or 0 if OK. 3293// 3294static int lwp_priocntl_init() { 3295 int rslt; 3296 pcinfo_t ClassInfo; 3297 pcparms_t ParmInfo; 3298 int i; 3299 3300 if (!UseThreadPriorities) return 0; 3301 3302 // If ThreadPriorityPolicy is 1, switch tables 3303 if (ThreadPriorityPolicy == 1) { 3304 for (i = 0; i < CriticalPriority+1; i++) 3305 os::java_to_os_priority[i] = prio_policy1[i]; 3306 } 3307 if (UseCriticalJavaThreadPriority) { 3308 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3309 // See set_native_priority() and set_lwp_class_and_priority(). 3310 // Save original MaxPriority mapping in case attempt to 3311 // use critical priority fails. 3312 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3313 // Set negative to distinguish from other priorities 3314 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3315 } 3316 3317 // Get IDs for a set of well-known scheduling classes. 3318 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3319 // the system. We should have a loop that iterates over the 3320 // classID values, which are known to be "small" integers. 3321 3322 strcpy(ClassInfo.pc_clname, "TS"); 3323 ClassInfo.pc_cid = -1; 3324 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3325 if (rslt < 0) return errno; 3326 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3327 tsLimits.schedPolicy = ClassInfo.pc_cid; 3328 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3329 tsLimits.minPrio = -tsLimits.maxPrio; 3330 3331 strcpy(ClassInfo.pc_clname, "IA"); 3332 ClassInfo.pc_cid = -1; 3333 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3334 if (rslt < 0) return errno; 3335 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3336 iaLimits.schedPolicy = ClassInfo.pc_cid; 3337 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3338 iaLimits.minPrio = -iaLimits.maxPrio; 3339 3340 strcpy(ClassInfo.pc_clname, "RT"); 3341 ClassInfo.pc_cid = -1; 3342 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3343 if (rslt < 0) return errno; 3344 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3345 rtLimits.schedPolicy = ClassInfo.pc_cid; 3346 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3347 rtLimits.minPrio = 0; 3348 3349 strcpy(ClassInfo.pc_clname, "FX"); 3350 ClassInfo.pc_cid = -1; 3351 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3352 if (rslt < 0) return errno; 3353 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3354 fxLimits.schedPolicy = ClassInfo.pc_cid; 3355 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3356 fxLimits.minPrio = 0; 3357 3358 // Query our "current" scheduling class. 3359 // This will normally be IA, TS or, rarely, FX or RT. 3360 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3361 ParmInfo.pc_cid = PC_CLNULL; 3362 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3363 if (rslt < 0) return errno; 3364 myClass = ParmInfo.pc_cid; 3365 3366 // We now know our scheduling classId, get specific information 3367 // about the class. 3368 ClassInfo.pc_cid = myClass; 3369 ClassInfo.pc_clname[0] = 0; 3370 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3371 if (rslt < 0) return errno; 3372 3373 if (ThreadPriorityVerbose) { 3374 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3375 } 3376 3377 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3378 ParmInfo.pc_cid = PC_CLNULL; 3379 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3380 if (rslt < 0) return errno; 3381 3382 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3383 myMin = rtLimits.minPrio; 3384 myMax = rtLimits.maxPrio; 3385 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3386 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3387 myMin = iaLimits.minPrio; 3388 myMax = iaLimits.maxPrio; 3389 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3390 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3391 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3392 myMin = tsLimits.minPrio; 3393 myMax = tsLimits.maxPrio; 3394 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3395 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3396 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3397 myMin = fxLimits.minPrio; 3398 myMax = fxLimits.maxPrio; 3399 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3400 } else { 3401 // No clue - punt 3402 if (ThreadPriorityVerbose) { 3403 tty->print_cr("Unknown scheduling class: %s ... \n", 3404 ClassInfo.pc_clname); 3405 } 3406 return EINVAL; // no clue, punt 3407 } 3408 3409 if (ThreadPriorityVerbose) { 3410 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3411 } 3412 3413 priocntl_enable = true; // Enable changing priorities 3414 return 0; 3415} 3416 3417#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3418#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3419#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3420#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3421 3422 3423// scale_to_lwp_priority 3424// 3425// Convert from the libthread "thr_setprio" scale to our current 3426// lwp scheduling class scale. 3427// 3428static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3429 int v; 3430 3431 if (x == 127) return rMax; // avoid round-down 3432 v = (((x*(rMax-rMin)))/128)+rMin; 3433 return v; 3434} 3435 3436 3437// set_lwp_class_and_priority 3438int set_lwp_class_and_priority(int ThreadID, int lwpid, 3439 int newPrio, int new_class, bool scale) { 3440 int rslt; 3441 int Actual, Expected, prv; 3442 pcparms_t ParmInfo; // for GET-SET 3443#ifdef ASSERT 3444 pcparms_t ReadBack; // for readback 3445#endif 3446 3447 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3448 // Query current values. 3449 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3450 // Cache "pcparms_t" in global ParmCache. 3451 // TODO: elide set-to-same-value 3452 3453 // If something went wrong on init, don't change priorities. 3454 if (!priocntl_enable) { 3455 if (ThreadPriorityVerbose) { 3456 tty->print_cr("Trying to set priority but init failed, ignoring"); 3457 } 3458 return EINVAL; 3459 } 3460 3461 // If lwp hasn't started yet, just return 3462 // the _start routine will call us again. 3463 if (lwpid <= 0) { 3464 if (ThreadPriorityVerbose) { 3465 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3466 INTPTR_FORMAT " to %d, lwpid not set", 3467 ThreadID, newPrio); 3468 } 3469 return 0; 3470 } 3471 3472 if (ThreadPriorityVerbose) { 3473 tty->print_cr ("set_lwp_class_and_priority(" 3474 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3475 ThreadID, lwpid, newPrio); 3476 } 3477 3478 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3479 ParmInfo.pc_cid = PC_CLNULL; 3480 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3481 if (rslt < 0) return errno; 3482 3483 int cur_class = ParmInfo.pc_cid; 3484 ParmInfo.pc_cid = (id_t)new_class; 3485 3486 if (new_class == rtLimits.schedPolicy) { 3487 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3488 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3489 rtLimits.maxPrio, newPrio) 3490 : newPrio; 3491 rtInfo->rt_tqsecs = RT_NOCHANGE; 3492 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3493 if (ThreadPriorityVerbose) { 3494 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3495 } 3496 } else if (new_class == iaLimits.schedPolicy) { 3497 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3498 int maxClamped = MIN2(iaLimits.maxPrio, 3499 cur_class == new_class 3500 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3501 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3502 maxClamped, newPrio) 3503 : newPrio; 3504 iaInfo->ia_uprilim = cur_class == new_class 3505 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3506 iaInfo->ia_mode = IA_NOCHANGE; 3507 if (ThreadPriorityVerbose) { 3508 tty->print_cr("IA: [%d...%d] %d->%d\n", 3509 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3510 } 3511 } else if (new_class == tsLimits.schedPolicy) { 3512 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3513 int maxClamped = MIN2(tsLimits.maxPrio, 3514 cur_class == new_class 3515 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3516 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3517 maxClamped, newPrio) 3518 : newPrio; 3519 tsInfo->ts_uprilim = cur_class == new_class 3520 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3521 if (ThreadPriorityVerbose) { 3522 tty->print_cr("TS: [%d...%d] %d->%d\n", 3523 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3524 } 3525 } else if (new_class == fxLimits.schedPolicy) { 3526 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3527 int maxClamped = MIN2(fxLimits.maxPrio, 3528 cur_class == new_class 3529 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3530 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3531 maxClamped, newPrio) 3532 : newPrio; 3533 fxInfo->fx_uprilim = cur_class == new_class 3534 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3535 fxInfo->fx_tqsecs = FX_NOCHANGE; 3536 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3537 if (ThreadPriorityVerbose) { 3538 tty->print_cr("FX: [%d...%d] %d->%d\n", 3539 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3540 } 3541 } else { 3542 if (ThreadPriorityVerbose) { 3543 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3544 } 3545 return EINVAL; // no clue, punt 3546 } 3547 3548 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3549 if (ThreadPriorityVerbose && rslt) { 3550 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3551 } 3552 if (rslt < 0) return errno; 3553 3554#ifdef ASSERT 3555 // Sanity check: read back what we just attempted to set. 3556 // In theory it could have changed in the interim ... 3557 // 3558 // The priocntl system call is tricky. 3559 // Sometimes it'll validate the priority value argument and 3560 // return EINVAL if unhappy. At other times it fails silently. 3561 // Readbacks are prudent. 3562 3563 if (!ReadBackValidate) return 0; 3564 3565 memset(&ReadBack, 0, sizeof(pcparms_t)); 3566 ReadBack.pc_cid = PC_CLNULL; 3567 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3568 assert(rslt >= 0, "priocntl failed"); 3569 Actual = Expected = 0xBAD; 3570 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3571 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3572 Actual = RTPRI(ReadBack)->rt_pri; 3573 Expected = RTPRI(ParmInfo)->rt_pri; 3574 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3575 Actual = IAPRI(ReadBack)->ia_upri; 3576 Expected = IAPRI(ParmInfo)->ia_upri; 3577 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3578 Actual = TSPRI(ReadBack)->ts_upri; 3579 Expected = TSPRI(ParmInfo)->ts_upri; 3580 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3581 Actual = FXPRI(ReadBack)->fx_upri; 3582 Expected = FXPRI(ParmInfo)->fx_upri; 3583 } else { 3584 if (ThreadPriorityVerbose) { 3585 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3586 ParmInfo.pc_cid); 3587 } 3588 } 3589 3590 if (Actual != Expected) { 3591 if (ThreadPriorityVerbose) { 3592 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3593 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3594 } 3595 } 3596#endif 3597 3598 return 0; 3599} 3600 3601// Solaris only gives access to 128 real priorities at a time, 3602// so we expand Java's ten to fill this range. This would be better 3603// if we dynamically adjusted relative priorities. 3604// 3605// The ThreadPriorityPolicy option allows us to select 2 different 3606// priority scales. 3607// 3608// ThreadPriorityPolicy=0 3609// Since the Solaris' default priority is MaximumPriority, we do not 3610// set a priority lower than Max unless a priority lower than 3611// NormPriority is requested. 3612// 3613// ThreadPriorityPolicy=1 3614// This mode causes the priority table to get filled with 3615// linear values. NormPriority get's mapped to 50% of the 3616// Maximum priority an so on. This will cause VM threads 3617// to get unfair treatment against other Solaris processes 3618// which do not explicitly alter their thread priorities. 3619 3620int os::java_to_os_priority[CriticalPriority + 1] = { 3621 -99999, // 0 Entry should never be used 3622 3623 0, // 1 MinPriority 3624 32, // 2 3625 64, // 3 3626 3627 96, // 4 3628 127, // 5 NormPriority 3629 127, // 6 3630 3631 127, // 7 3632 127, // 8 3633 127, // 9 NearMaxPriority 3634 3635 127, // 10 MaxPriority 3636 3637 -criticalPrio // 11 CriticalPriority 3638}; 3639 3640OSReturn os::set_native_priority(Thread* thread, int newpri) { 3641 OSThread* osthread = thread->osthread(); 3642 3643 // Save requested priority in case the thread hasn't been started 3644 osthread->set_native_priority(newpri); 3645 3646 // Check for critical priority request 3647 bool fxcritical = false; 3648 if (newpri == -criticalPrio) { 3649 fxcritical = true; 3650 newpri = criticalPrio; 3651 } 3652 3653 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3654 if (!UseThreadPriorities) return OS_OK; 3655 3656 int status = 0; 3657 3658 if (!fxcritical) { 3659 // Use thr_setprio only if we have a priority that thr_setprio understands 3660 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3661 } 3662 3663 int lwp_status = 3664 set_lwp_class_and_priority(osthread->thread_id(), 3665 osthread->lwp_id(), 3666 newpri, 3667 fxcritical ? fxLimits.schedPolicy : myClass, 3668 !fxcritical); 3669 if (lwp_status != 0 && fxcritical) { 3670 // Try again, this time without changing the scheduling class 3671 newpri = java_MaxPriority_to_os_priority; 3672 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3673 osthread->lwp_id(), 3674 newpri, myClass, false); 3675 } 3676 status |= lwp_status; 3677 return (status == 0) ? OS_OK : OS_ERR; 3678} 3679 3680 3681OSReturn os::get_native_priority(const Thread* const thread, 3682 int *priority_ptr) { 3683 int p; 3684 if (!UseThreadPriorities) { 3685 *priority_ptr = NormalPriority; 3686 return OS_OK; 3687 } 3688 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3689 if (status != 0) { 3690 return OS_ERR; 3691 } 3692 *priority_ptr = p; 3693 return OS_OK; 3694} 3695 3696 3697// Hint to the underlying OS that a task switch would not be good. 3698// Void return because it's a hint and can fail. 3699void os::hint_no_preempt() { 3700 schedctl_start(schedctl_init()); 3701} 3702 3703static void resume_clear_context(OSThread *osthread) { 3704 osthread->set_ucontext(NULL); 3705} 3706 3707static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3708 osthread->set_ucontext(context); 3709} 3710 3711static Semaphore sr_semaphore; 3712 3713void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3714 // Save and restore errno to avoid confusing native code with EINTR 3715 // after sigsuspend. 3716 int old_errno = errno; 3717 3718 OSThread* osthread = thread->osthread(); 3719 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3720 3721 os::SuspendResume::State current = osthread->sr.state(); 3722 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3723 suspend_save_context(osthread, uc); 3724 3725 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3726 os::SuspendResume::State state = osthread->sr.suspended(); 3727 if (state == os::SuspendResume::SR_SUSPENDED) { 3728 sigset_t suspend_set; // signals for sigsuspend() 3729 3730 // get current set of blocked signals and unblock resume signal 3731 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 3732 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3733 3734 sr_semaphore.signal(); 3735 // wait here until we are resumed 3736 while (1) { 3737 sigsuspend(&suspend_set); 3738 3739 os::SuspendResume::State result = osthread->sr.running(); 3740 if (result == os::SuspendResume::SR_RUNNING) { 3741 sr_semaphore.signal(); 3742 break; 3743 } 3744 } 3745 3746 } else if (state == os::SuspendResume::SR_RUNNING) { 3747 // request was cancelled, continue 3748 } else { 3749 ShouldNotReachHere(); 3750 } 3751 3752 resume_clear_context(osthread); 3753 } else if (current == os::SuspendResume::SR_RUNNING) { 3754 // request was cancelled, continue 3755 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3756 // ignore 3757 } else { 3758 // ignore 3759 } 3760 3761 errno = old_errno; 3762} 3763 3764void os::print_statistics() { 3765} 3766 3767int os::message_box(const char* title, const char* message) { 3768 int i; 3769 fdStream err(defaultStream::error_fd()); 3770 for (i = 0; i < 78; i++) err.print_raw("="); 3771 err.cr(); 3772 err.print_raw_cr(title); 3773 for (i = 0; i < 78; i++) err.print_raw("-"); 3774 err.cr(); 3775 err.print_raw_cr(message); 3776 for (i = 0; i < 78; i++) err.print_raw("="); 3777 err.cr(); 3778 3779 char buf[16]; 3780 // Prevent process from exiting upon "read error" without consuming all CPU 3781 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3782 3783 return buf[0] == 'y' || buf[0] == 'Y'; 3784} 3785 3786static int sr_notify(OSThread* osthread) { 3787 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3788 assert_status(status == 0, status, "thr_kill"); 3789 return status; 3790} 3791 3792// "Randomly" selected value for how long we want to spin 3793// before bailing out on suspending a thread, also how often 3794// we send a signal to a thread we want to resume 3795static const int RANDOMLY_LARGE_INTEGER = 1000000; 3796static const int RANDOMLY_LARGE_INTEGER2 = 100; 3797 3798static bool do_suspend(OSThread* osthread) { 3799 assert(osthread->sr.is_running(), "thread should be running"); 3800 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3801 3802 // mark as suspended and send signal 3803 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3804 // failed to switch, state wasn't running? 3805 ShouldNotReachHere(); 3806 return false; 3807 } 3808 3809 if (sr_notify(osthread) != 0) { 3810 ShouldNotReachHere(); 3811 } 3812 3813 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3814 while (true) { 3815 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3816 break; 3817 } else { 3818 // timeout 3819 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3820 if (cancelled == os::SuspendResume::SR_RUNNING) { 3821 return false; 3822 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3823 // make sure that we consume the signal on the semaphore as well 3824 sr_semaphore.wait(); 3825 break; 3826 } else { 3827 ShouldNotReachHere(); 3828 return false; 3829 } 3830 } 3831 } 3832 3833 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3834 return true; 3835} 3836 3837static void do_resume(OSThread* osthread) { 3838 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3839 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3840 3841 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3842 // failed to switch to WAKEUP_REQUEST 3843 ShouldNotReachHere(); 3844 return; 3845 } 3846 3847 while (true) { 3848 if (sr_notify(osthread) == 0) { 3849 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3850 if (osthread->sr.is_running()) { 3851 return; 3852 } 3853 } 3854 } else { 3855 ShouldNotReachHere(); 3856 } 3857 } 3858 3859 guarantee(osthread->sr.is_running(), "Must be running!"); 3860} 3861 3862void os::SuspendedThreadTask::internal_do_task() { 3863 if (do_suspend(_thread->osthread())) { 3864 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3865 do_task(context); 3866 do_resume(_thread->osthread()); 3867 } 3868} 3869 3870class PcFetcher : public os::SuspendedThreadTask { 3871 public: 3872 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3873 ExtendedPC result(); 3874 protected: 3875 void do_task(const os::SuspendedThreadTaskContext& context); 3876 private: 3877 ExtendedPC _epc; 3878}; 3879 3880ExtendedPC PcFetcher::result() { 3881 guarantee(is_done(), "task is not done yet."); 3882 return _epc; 3883} 3884 3885void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3886 Thread* thread = context.thread(); 3887 OSThread* osthread = thread->osthread(); 3888 if (osthread->ucontext() != NULL) { 3889 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 3890 } else { 3891 // NULL context is unexpected, double-check this is the VMThread 3892 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3893 } 3894} 3895 3896// A lightweight implementation that does not suspend the target thread and 3897// thus returns only a hint. Used for profiling only! 3898ExtendedPC os::get_thread_pc(Thread* thread) { 3899 // Make sure that it is called by the watcher and the Threads lock is owned. 3900 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3901 // For now, is only used to profile the VM Thread 3902 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3903 PcFetcher fetcher(thread); 3904 fetcher.run(); 3905 return fetcher.result(); 3906} 3907 3908 3909// This does not do anything on Solaris. This is basically a hook for being 3910// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3911void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3912 methodHandle* method, JavaCallArguments* args, 3913 Thread* thread) { 3914 f(value, method, args, thread); 3915} 3916 3917// This routine may be used by user applications as a "hook" to catch signals. 3918// The user-defined signal handler must pass unrecognized signals to this 3919// routine, and if it returns true (non-zero), then the signal handler must 3920// return immediately. If the flag "abort_if_unrecognized" is true, then this 3921// routine will never retun false (zero), but instead will execute a VM panic 3922// routine kill the process. 3923// 3924// If this routine returns false, it is OK to call it again. This allows 3925// the user-defined signal handler to perform checks either before or after 3926// the VM performs its own checks. Naturally, the user code would be making 3927// a serious error if it tried to handle an exception (such as a null check 3928// or breakpoint) that the VM was generating for its own correct operation. 3929// 3930// This routine may recognize any of the following kinds of signals: 3931// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3932// os::Solaris::SIGasync 3933// It should be consulted by handlers for any of those signals. 3934// It explicitly does not recognize os::Solaris::SIGinterrupt 3935// 3936// The caller of this routine must pass in the three arguments supplied 3937// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3938// field of the structure passed to sigaction(). This routine assumes that 3939// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3940// 3941// Note that the VM will print warnings if it detects conflicting signal 3942// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3943// 3944extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3945 siginfo_t* siginfo, 3946 void* ucontext, 3947 int abort_if_unrecognized); 3948 3949 3950void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3951 int orig_errno = errno; // Preserve errno value over signal handler. 3952 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3953 errno = orig_errno; 3954} 3955 3956// Do not delete - if guarantee is ever removed, a signal handler (even empty) 3957// is needed to provoke threads blocked on IO to return an EINTR 3958// Note: this explicitly does NOT call JVM_handle_solaris_signal and 3959// does NOT participate in signal chaining due to requirement for 3960// NOT setting SA_RESTART to make EINTR work. 3961extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3962 if (UseSignalChaining) { 3963 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3964 if (actp && actp->sa_handler) { 3965 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3966 } 3967 } 3968} 3969 3970// This boolean allows users to forward their own non-matching signals 3971// to JVM_handle_solaris_signal, harmlessly. 3972bool os::Solaris::signal_handlers_are_installed = false; 3973 3974// For signal-chaining 3975bool os::Solaris::libjsig_is_loaded = false; 3976typedef struct sigaction *(*get_signal_t)(int); 3977get_signal_t os::Solaris::get_signal_action = NULL; 3978 3979struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3980 struct sigaction *actp = NULL; 3981 3982 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3983 // Retrieve the old signal handler from libjsig 3984 actp = (*get_signal_action)(sig); 3985 } 3986 if (actp == NULL) { 3987 // Retrieve the preinstalled signal handler from jvm 3988 actp = get_preinstalled_handler(sig); 3989 } 3990 3991 return actp; 3992} 3993 3994static bool call_chained_handler(struct sigaction *actp, int sig, 3995 siginfo_t *siginfo, void *context) { 3996 // Call the old signal handler 3997 if (actp->sa_handler == SIG_DFL) { 3998 // It's more reasonable to let jvm treat it as an unexpected exception 3999 // instead of taking the default action. 4000 return false; 4001 } else if (actp->sa_handler != SIG_IGN) { 4002 if ((actp->sa_flags & SA_NODEFER) == 0) { 4003 // automaticlly block the signal 4004 sigaddset(&(actp->sa_mask), sig); 4005 } 4006 4007 sa_handler_t hand; 4008 sa_sigaction_t sa; 4009 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4010 // retrieve the chained handler 4011 if (siginfo_flag_set) { 4012 sa = actp->sa_sigaction; 4013 } else { 4014 hand = actp->sa_handler; 4015 } 4016 4017 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4018 actp->sa_handler = SIG_DFL; 4019 } 4020 4021 // try to honor the signal mask 4022 sigset_t oset; 4023 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4024 4025 // call into the chained handler 4026 if (siginfo_flag_set) { 4027 (*sa)(sig, siginfo, context); 4028 } else { 4029 (*hand)(sig); 4030 } 4031 4032 // restore the signal mask 4033 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4034 } 4035 // Tell jvm's signal handler the signal is taken care of. 4036 return true; 4037} 4038 4039bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4040 bool chained = false; 4041 // signal-chaining 4042 if (UseSignalChaining) { 4043 struct sigaction *actp = get_chained_signal_action(sig); 4044 if (actp != NULL) { 4045 chained = call_chained_handler(actp, sig, siginfo, context); 4046 } 4047 } 4048 return chained; 4049} 4050 4051struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4052 assert((chainedsigactions != (struct sigaction *)NULL) && 4053 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4054 if (preinstalled_sigs[sig] != 0) { 4055 return &chainedsigactions[sig]; 4056 } 4057 return NULL; 4058} 4059 4060void os::Solaris::save_preinstalled_handler(int sig, 4061 struct sigaction& oldAct) { 4062 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4063 assert((chainedsigactions != (struct sigaction *)NULL) && 4064 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4065 chainedsigactions[sig] = oldAct; 4066 preinstalled_sigs[sig] = 1; 4067} 4068 4069void os::Solaris::set_signal_handler(int sig, bool set_installed, 4070 bool oktochain) { 4071 // Check for overwrite. 4072 struct sigaction oldAct; 4073 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4074 void* oldhand = 4075 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4076 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4077 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4078 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4079 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4080 if (AllowUserSignalHandlers || !set_installed) { 4081 // Do not overwrite; user takes responsibility to forward to us. 4082 return; 4083 } else if (UseSignalChaining) { 4084 if (oktochain) { 4085 // save the old handler in jvm 4086 save_preinstalled_handler(sig, oldAct); 4087 } else { 4088 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4089 } 4090 // libjsig also interposes the sigaction() call below and saves the 4091 // old sigaction on it own. 4092 } else { 4093 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4094 "%#lx for signal %d.", (long)oldhand, sig)); 4095 } 4096 } 4097 4098 struct sigaction sigAct; 4099 sigfillset(&(sigAct.sa_mask)); 4100 sigAct.sa_handler = SIG_DFL; 4101 4102 sigAct.sa_sigaction = signalHandler; 4103 // Handle SIGSEGV on alternate signal stack if 4104 // not using stack banging 4105 if (!UseStackBanging && sig == SIGSEGV) { 4106 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4107 } else if (sig == os::Solaris::SIGinterrupt()) { 4108 // Interruptible i/o requires SA_RESTART cleared so EINTR 4109 // is returned instead of restarting system calls 4110 sigemptyset(&sigAct.sa_mask); 4111 sigAct.sa_handler = NULL; 4112 sigAct.sa_flags = SA_SIGINFO; 4113 sigAct.sa_sigaction = sigINTRHandler; 4114 } else { 4115 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4116 } 4117 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4118 4119 sigaction(sig, &sigAct, &oldAct); 4120 4121 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4122 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4123 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4124} 4125 4126 4127#define DO_SIGNAL_CHECK(sig) \ 4128 do { \ 4129 if (!sigismember(&check_signal_done, sig)) { \ 4130 os::Solaris::check_signal_handler(sig); \ 4131 } \ 4132 } while (0) 4133 4134// This method is a periodic task to check for misbehaving JNI applications 4135// under CheckJNI, we can add any periodic checks here 4136 4137void os::run_periodic_checks() { 4138 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4139 // thereby preventing a NULL checks. 4140 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4141 4142 if (check_signals == false) return; 4143 4144 // SEGV and BUS if overridden could potentially prevent 4145 // generation of hs*.log in the event of a crash, debugging 4146 // such a case can be very challenging, so we absolutely 4147 // check for the following for a good measure: 4148 DO_SIGNAL_CHECK(SIGSEGV); 4149 DO_SIGNAL_CHECK(SIGILL); 4150 DO_SIGNAL_CHECK(SIGFPE); 4151 DO_SIGNAL_CHECK(SIGBUS); 4152 DO_SIGNAL_CHECK(SIGPIPE); 4153 DO_SIGNAL_CHECK(SIGXFSZ); 4154 4155 // ReduceSignalUsage allows the user to override these handlers 4156 // see comments at the very top and jvm_solaris.h 4157 if (!ReduceSignalUsage) { 4158 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4159 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4160 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4161 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4162 } 4163 4164 // See comments above for using JVM1/JVM2 and UseAltSigs 4165 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4166 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4167 4168} 4169 4170typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4171 4172static os_sigaction_t os_sigaction = NULL; 4173 4174void os::Solaris::check_signal_handler(int sig) { 4175 char buf[O_BUFLEN]; 4176 address jvmHandler = NULL; 4177 4178 struct sigaction act; 4179 if (os_sigaction == NULL) { 4180 // only trust the default sigaction, in case it has been interposed 4181 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4182 if (os_sigaction == NULL) return; 4183 } 4184 4185 os_sigaction(sig, (struct sigaction*)NULL, &act); 4186 4187 address thisHandler = (act.sa_flags & SA_SIGINFO) 4188 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4189 : CAST_FROM_FN_PTR(address, act.sa_handler); 4190 4191 4192 switch (sig) { 4193 case SIGSEGV: 4194 case SIGBUS: 4195 case SIGFPE: 4196 case SIGPIPE: 4197 case SIGXFSZ: 4198 case SIGILL: 4199 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4200 break; 4201 4202 case SHUTDOWN1_SIGNAL: 4203 case SHUTDOWN2_SIGNAL: 4204 case SHUTDOWN3_SIGNAL: 4205 case BREAK_SIGNAL: 4206 jvmHandler = (address)user_handler(); 4207 break; 4208 4209 default: 4210 int intrsig = os::Solaris::SIGinterrupt(); 4211 int asynsig = os::Solaris::SIGasync(); 4212 4213 if (sig == intrsig) { 4214 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4215 } else if (sig == asynsig) { 4216 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4217 } else { 4218 return; 4219 } 4220 break; 4221 } 4222 4223 4224 if (thisHandler != jvmHandler) { 4225 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4226 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4227 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4228 // No need to check this sig any longer 4229 sigaddset(&check_signal_done, sig); 4230 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4231 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4232 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4233 exception_name(sig, buf, O_BUFLEN)); 4234 } 4235 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4236 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4237 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4238 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4239 // No need to check this sig any longer 4240 sigaddset(&check_signal_done, sig); 4241 } 4242 4243 // Print all the signal handler state 4244 if (sigismember(&check_signal_done, sig)) { 4245 print_signal_handlers(tty, buf, O_BUFLEN); 4246 } 4247 4248} 4249 4250void os::Solaris::install_signal_handlers() { 4251 bool libjsigdone = false; 4252 signal_handlers_are_installed = true; 4253 4254 // signal-chaining 4255 typedef void (*signal_setting_t)(); 4256 signal_setting_t begin_signal_setting = NULL; 4257 signal_setting_t end_signal_setting = NULL; 4258 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4259 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4260 if (begin_signal_setting != NULL) { 4261 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4262 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4263 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4264 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4265 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4266 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4267 libjsig_is_loaded = true; 4268 if (os::Solaris::get_libjsig_version != NULL) { 4269 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4270 } 4271 assert(UseSignalChaining, "should enable signal-chaining"); 4272 } 4273 if (libjsig_is_loaded) { 4274 // Tell libjsig jvm is setting signal handlers 4275 (*begin_signal_setting)(); 4276 } 4277 4278 set_signal_handler(SIGSEGV, true, true); 4279 set_signal_handler(SIGPIPE, true, true); 4280 set_signal_handler(SIGXFSZ, true, true); 4281 set_signal_handler(SIGBUS, true, true); 4282 set_signal_handler(SIGILL, true, true); 4283 set_signal_handler(SIGFPE, true, true); 4284 4285 4286 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4287 4288 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4289 // can not register overridable signals which might be > 32 4290 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4291 // Tell libjsig jvm has finished setting signal handlers 4292 (*end_signal_setting)(); 4293 libjsigdone = true; 4294 } 4295 } 4296 4297 // Never ok to chain our SIGinterrupt 4298 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4299 set_signal_handler(os::Solaris::SIGasync(), true, true); 4300 4301 if (libjsig_is_loaded && !libjsigdone) { 4302 // Tell libjsig jvm finishes setting signal handlers 4303 (*end_signal_setting)(); 4304 } 4305 4306 // We don't activate signal checker if libjsig is in place, we trust ourselves 4307 // and if UserSignalHandler is installed all bets are off. 4308 // Log that signal checking is off only if -verbose:jni is specified. 4309 if (CheckJNICalls) { 4310 if (libjsig_is_loaded) { 4311 if (PrintJNIResolving) { 4312 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4313 } 4314 check_signals = false; 4315 } 4316 if (AllowUserSignalHandlers) { 4317 if (PrintJNIResolving) { 4318 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4319 } 4320 check_signals = false; 4321 } 4322 } 4323} 4324 4325 4326void report_error(const char* file_name, int line_no, const char* title, 4327 const char* format, ...); 4328 4329const char * signames[] = { 4330 "SIG0", 4331 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4332 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4333 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4334 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4335 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4336 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4337 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4338 "SIGCANCEL", "SIGLOST" 4339}; 4340 4341const char* os::exception_name(int exception_code, char* buf, size_t size) { 4342 if (0 < exception_code && exception_code <= SIGRTMAX) { 4343 // signal 4344 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4345 jio_snprintf(buf, size, "%s", signames[exception_code]); 4346 } else { 4347 jio_snprintf(buf, size, "SIG%d", exception_code); 4348 } 4349 return buf; 4350 } else { 4351 return NULL; 4352 } 4353} 4354 4355// (Static) wrapper for getisax(2) call. 4356os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4357 4358// (Static) wrappers for the liblgrp API 4359os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4360os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4361os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4362os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4363os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4364os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4365os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4366os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4367os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4368 4369// (Static) wrapper for meminfo() call. 4370os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4371 4372static address resolve_symbol_lazy(const char* name) { 4373 address addr = (address) dlsym(RTLD_DEFAULT, name); 4374 if (addr == NULL) { 4375 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4376 addr = (address) dlsym(RTLD_NEXT, name); 4377 } 4378 return addr; 4379} 4380 4381static address resolve_symbol(const char* name) { 4382 address addr = resolve_symbol_lazy(name); 4383 if (addr == NULL) { 4384 fatal(dlerror()); 4385 } 4386 return addr; 4387} 4388 4389void os::Solaris::libthread_init() { 4390 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4391 4392 lwp_priocntl_init(); 4393 4394 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4395 if (func == NULL) { 4396 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4397 // Guarantee that this VM is running on an new enough OS (5.6 or 4398 // later) that it will have a new enough libthread.so. 4399 guarantee(func != NULL, "libthread.so is too old."); 4400 } 4401 4402 int size; 4403 void (*handler_info_func)(address *, int *); 4404 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4405 handler_info_func(&handler_start, &size); 4406 handler_end = handler_start + size; 4407} 4408 4409 4410int_fnP_mutex_tP os::Solaris::_mutex_lock; 4411int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4412int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4413int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4414int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4415int os::Solaris::_mutex_scope = USYNC_THREAD; 4416 4417int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4418int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4419int_fnP_cond_tP os::Solaris::_cond_signal; 4420int_fnP_cond_tP os::Solaris::_cond_broadcast; 4421int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4422int_fnP_cond_tP os::Solaris::_cond_destroy; 4423int os::Solaris::_cond_scope = USYNC_THREAD; 4424 4425void os::Solaris::synchronization_init() { 4426 if (UseLWPSynchronization) { 4427 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4428 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4429 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4430 os::Solaris::set_mutex_init(lwp_mutex_init); 4431 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4432 os::Solaris::set_mutex_scope(USYNC_THREAD); 4433 4434 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4435 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4436 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4437 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4438 os::Solaris::set_cond_init(lwp_cond_init); 4439 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4440 os::Solaris::set_cond_scope(USYNC_THREAD); 4441 } else { 4442 os::Solaris::set_mutex_scope(USYNC_THREAD); 4443 os::Solaris::set_cond_scope(USYNC_THREAD); 4444 4445 if (UsePthreads) { 4446 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4447 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4448 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4449 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4450 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4451 4452 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4453 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4454 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4455 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4456 os::Solaris::set_cond_init(pthread_cond_default_init); 4457 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4458 } else { 4459 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4460 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4461 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4462 os::Solaris::set_mutex_init(::mutex_init); 4463 os::Solaris::set_mutex_destroy(::mutex_destroy); 4464 4465 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4466 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4467 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4468 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4469 os::Solaris::set_cond_init(::cond_init); 4470 os::Solaris::set_cond_destroy(::cond_destroy); 4471 } 4472 } 4473} 4474 4475bool os::Solaris::liblgrp_init() { 4476 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4477 if (handle != NULL) { 4478 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4479 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4480 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4481 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4482 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4483 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4484 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4485 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4486 dlsym(handle, "lgrp_cookie_stale"))); 4487 4488 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4489 set_lgrp_cookie(c); 4490 return true; 4491 } 4492 return false; 4493} 4494 4495void os::Solaris::misc_sym_init() { 4496 address func; 4497 4498 // getisax 4499 func = resolve_symbol_lazy("getisax"); 4500 if (func != NULL) { 4501 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4502 } 4503 4504 // meminfo 4505 func = resolve_symbol_lazy("meminfo"); 4506 if (func != NULL) { 4507 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4508 } 4509} 4510 4511uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4512 assert(_getisax != NULL, "_getisax not set"); 4513 return _getisax(array, n); 4514} 4515 4516// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4517typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4518static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4519 4520void init_pset_getloadavg_ptr(void) { 4521 pset_getloadavg_ptr = 4522 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4523 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4524 warning("pset_getloadavg function not found"); 4525 } 4526} 4527 4528int os::Solaris::_dev_zero_fd = -1; 4529 4530// this is called _before_ the global arguments have been parsed 4531void os::init(void) { 4532 _initial_pid = getpid(); 4533 4534 max_hrtime = first_hrtime = gethrtime(); 4535 4536 init_random(1234567); 4537 4538 page_size = sysconf(_SC_PAGESIZE); 4539 if (page_size == -1) { 4540 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4541 strerror(errno))); 4542 } 4543 init_page_sizes((size_t) page_size); 4544 4545 Solaris::initialize_system_info(); 4546 4547 // Initialize misc. symbols as soon as possible, so we can use them 4548 // if we need them. 4549 Solaris::misc_sym_init(); 4550 4551 int fd = ::open("/dev/zero", O_RDWR); 4552 if (fd < 0) { 4553 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4554 } else { 4555 Solaris::set_dev_zero_fd(fd); 4556 4557 // Close on exec, child won't inherit. 4558 fcntl(fd, F_SETFD, FD_CLOEXEC); 4559 } 4560 4561 clock_tics_per_sec = CLK_TCK; 4562 4563 // check if dladdr1() exists; dladdr1 can provide more information than 4564 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4565 // and is available on linker patches for 5.7 and 5.8. 4566 // libdl.so must have been loaded, this call is just an entry lookup 4567 void * hdl = dlopen("libdl.so", RTLD_NOW); 4568 if (hdl) { 4569 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4570 } 4571 4572 // (Solaris only) this switches to calls that actually do locking. 4573 ThreadCritical::initialize(); 4574 4575 main_thread = thr_self(); 4576 4577 // Constant minimum stack size allowed. It must be at least 4578 // the minimum of what the OS supports (thr_min_stack()), and 4579 // enough to allow the thread to get to user bytecode execution. 4580 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4581 // If the pagesize of the VM is greater than 8K determine the appropriate 4582 // number of initial guard pages. The user can change this with the 4583 // command line arguments, if needed. 4584 if (vm_page_size() > 8*K) { 4585 StackYellowPages = 1; 4586 StackRedPages = 1; 4587 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4588 } 4589} 4590 4591// To install functions for atexit system call 4592extern "C" { 4593 static void perfMemory_exit_helper() { 4594 perfMemory_exit(); 4595 } 4596} 4597 4598// this is called _after_ the global arguments have been parsed 4599jint os::init_2(void) { 4600 // try to enable extended file IO ASAP, see 6431278 4601 os::Solaris::try_enable_extended_io(); 4602 4603 // Allocate a single page and mark it as readable for safepoint polling. Also 4604 // use this first mmap call to check support for MAP_ALIGN. 4605 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4606 page_size, 4607 MAP_PRIVATE | MAP_ALIGN, 4608 PROT_READ); 4609 if (polling_page == NULL) { 4610 has_map_align = false; 4611 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4612 PROT_READ); 4613 } 4614 4615 os::set_polling_page(polling_page); 4616 4617#ifndef PRODUCT 4618 if (Verbose && PrintMiscellaneous) { 4619 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", 4620 (intptr_t)polling_page); 4621 } 4622#endif 4623 4624 if (!UseMembar) { 4625 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4626 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4627 os::set_memory_serialize_page(mem_serialize_page); 4628 4629#ifndef PRODUCT 4630 if (Verbose && PrintMiscellaneous) { 4631 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", 4632 (intptr_t)mem_serialize_page); 4633 } 4634#endif 4635 } 4636 4637 // Check minimum allowable stack size for thread creation and to initialize 4638 // the java system classes, including StackOverflowError - depends on page 4639 // size. Add a page for compiler2 recursion in main thread. 4640 // Add in 2*BytesPerWord times page size to account for VM stack during 4641 // class initialization depending on 32 or 64 bit VM. 4642 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4643 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4644 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4645 4646 size_t threadStackSizeInBytes = ThreadStackSize * K; 4647 if (threadStackSizeInBytes != 0 && 4648 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4649 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4650 os::Solaris::min_stack_allowed/K); 4651 return JNI_ERR; 4652 } 4653 4654 // For 64kbps there will be a 64kb page size, which makes 4655 // the usable default stack size quite a bit less. Increase the 4656 // stack for 64kb (or any > than 8kb) pages, this increases 4657 // virtual memory fragmentation (since we're not creating the 4658 // stack on a power of 2 boundary. The real fix for this 4659 // should be to fix the guard page mechanism. 4660 4661 if (vm_page_size() > 8*K) { 4662 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4663 ? threadStackSizeInBytes + 4664 ((StackYellowPages + StackRedPages) * vm_page_size()) 4665 : 0; 4666 ThreadStackSize = threadStackSizeInBytes/K; 4667 } 4668 4669 // Make the stack size a multiple of the page size so that 4670 // the yellow/red zones can be guarded. 4671 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4672 vm_page_size())); 4673 4674 Solaris::libthread_init(); 4675 4676 if (UseNUMA) { 4677 if (!Solaris::liblgrp_init()) { 4678 UseNUMA = false; 4679 } else { 4680 size_t lgrp_limit = os::numa_get_groups_num(); 4681 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4682 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4683 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 4684 if (lgrp_num < 2) { 4685 // There's only one locality group, disable NUMA. 4686 UseNUMA = false; 4687 } 4688 } 4689 if (!UseNUMA && ForceNUMA) { 4690 UseNUMA = true; 4691 } 4692 } 4693 4694 Solaris::signal_sets_init(); 4695 Solaris::init_signal_mem(); 4696 Solaris::install_signal_handlers(); 4697 4698 if (libjsigversion < JSIG_VERSION_1_4_1) { 4699 Maxlibjsigsigs = OLDMAXSIGNUM; 4700 } 4701 4702 // initialize synchronization primitives to use either thread or 4703 // lwp synchronization (controlled by UseLWPSynchronization) 4704 Solaris::synchronization_init(); 4705 4706 if (MaxFDLimit) { 4707 // set the number of file descriptors to max. print out error 4708 // if getrlimit/setrlimit fails but continue regardless. 4709 struct rlimit nbr_files; 4710 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4711 if (status != 0) { 4712 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4713 perror("os::init_2 getrlimit failed"); 4714 } 4715 } else { 4716 nbr_files.rlim_cur = nbr_files.rlim_max; 4717 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4718 if (status != 0) { 4719 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4720 perror("os::init_2 setrlimit failed"); 4721 } 4722 } 4723 } 4724 } 4725 4726 // Calculate theoretical max. size of Threads to guard gainst 4727 // artifical out-of-memory situations, where all available address- 4728 // space has been reserved by thread stacks. Default stack size is 1Mb. 4729 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4730 JavaThread::stack_size_at_create() : (1*K*K); 4731 assert(pre_thread_stack_size != 0, "Must have a stack"); 4732 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4733 // we should start doing Virtual Memory banging. Currently when the threads will 4734 // have used all but 200Mb of space. 4735 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4736 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4737 4738 // at-exit methods are called in the reverse order of their registration. 4739 // In Solaris 7 and earlier, atexit functions are called on return from 4740 // main or as a result of a call to exit(3C). There can be only 32 of 4741 // these functions registered and atexit() does not set errno. In Solaris 4742 // 8 and later, there is no limit to the number of functions registered 4743 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4744 // functions are called upon dlclose(3DL) in addition to return from main 4745 // and exit(3C). 4746 4747 if (PerfAllowAtExitRegistration) { 4748 // only register atexit functions if PerfAllowAtExitRegistration is set. 4749 // atexit functions can be delayed until process exit time, which 4750 // can be problematic for embedded VM situations. Embedded VMs should 4751 // call DestroyJavaVM() to assure that VM resources are released. 4752 4753 // note: perfMemory_exit_helper atexit function may be removed in 4754 // the future if the appropriate cleanup code can be added to the 4755 // VM_Exit VMOperation's doit method. 4756 if (atexit(perfMemory_exit_helper) != 0) { 4757 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4758 } 4759 } 4760 4761 // Init pset_loadavg function pointer 4762 init_pset_getloadavg_ptr(); 4763 4764 return JNI_OK; 4765} 4766 4767void os::init_3(void) { 4768 return; 4769} 4770 4771// Mark the polling page as unreadable 4772void os::make_polling_page_unreadable(void) { 4773 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4774 fatal("Could not disable polling page"); 4775 } 4776} 4777 4778// Mark the polling page as readable 4779void os::make_polling_page_readable(void) { 4780 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4781 fatal("Could not enable polling page"); 4782 } 4783} 4784 4785// OS interface. 4786 4787bool os::check_heap(bool force) { return true; } 4788 4789// Is a (classpath) directory empty? 4790bool os::dir_is_empty(const char* path) { 4791 DIR *dir = NULL; 4792 struct dirent *ptr; 4793 4794 dir = opendir(path); 4795 if (dir == NULL) return true; 4796 4797 // Scan the directory 4798 bool result = true; 4799 char buf[sizeof(struct dirent) + MAX_PATH]; 4800 struct dirent *dbuf = (struct dirent *) buf; 4801 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4802 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4803 result = false; 4804 } 4805 } 4806 closedir(dir); 4807 return result; 4808} 4809 4810// This code originates from JDK's sysOpen and open64_w 4811// from src/solaris/hpi/src/system_md.c 4812 4813int os::open(const char *path, int oflag, int mode) { 4814 if (strlen(path) > MAX_PATH - 1) { 4815 errno = ENAMETOOLONG; 4816 return -1; 4817 } 4818 int fd; 4819 4820 fd = ::open64(path, oflag, mode); 4821 if (fd == -1) return -1; 4822 4823 // If the open succeeded, the file might still be a directory 4824 { 4825 struct stat64 buf64; 4826 int ret = ::fstat64(fd, &buf64); 4827 int st_mode = buf64.st_mode; 4828 4829 if (ret != -1) { 4830 if ((st_mode & S_IFMT) == S_IFDIR) { 4831 errno = EISDIR; 4832 ::close(fd); 4833 return -1; 4834 } 4835 } else { 4836 ::close(fd); 4837 return -1; 4838 } 4839 } 4840 4841 // 32-bit Solaris systems suffer from: 4842 // 4843 // - an historical default soft limit of 256 per-process file 4844 // descriptors that is too low for many Java programs. 4845 // 4846 // - a design flaw where file descriptors created using stdio 4847 // fopen must be less than 256, _even_ when the first limit above 4848 // has been raised. This can cause calls to fopen (but not calls to 4849 // open, for example) to fail mysteriously, perhaps in 3rd party 4850 // native code (although the JDK itself uses fopen). One can hardly 4851 // criticize them for using this most standard of all functions. 4852 // 4853 // We attempt to make everything work anyways by: 4854 // 4855 // - raising the soft limit on per-process file descriptors beyond 4856 // 256 4857 // 4858 // - As of Solaris 10u4, we can request that Solaris raise the 256 4859 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4860 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4861 // 4862 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4863 // workaround the bug by remapping non-stdio file descriptors below 4864 // 256 to ones beyond 256, which is done below. 4865 // 4866 // See: 4867 // 1085341: 32-bit stdio routines should support file descriptors >255 4868 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4869 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4870 // enable_extended_FILE_stdio() in VM initialisation 4871 // Giri Mandalika's blog 4872 // http://technopark02.blogspot.com/2005_05_01_archive.html 4873 // 4874#ifndef _LP64 4875 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4876 int newfd = ::fcntl(fd, F_DUPFD, 256); 4877 if (newfd != -1) { 4878 ::close(fd); 4879 fd = newfd; 4880 } 4881 } 4882#endif // 32-bit Solaris 4883 4884 // All file descriptors that are opened in the JVM and not 4885 // specifically destined for a subprocess should have the 4886 // close-on-exec flag set. If we don't set it, then careless 3rd 4887 // party native code might fork and exec without closing all 4888 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4889 // UNIXProcess.c), and this in turn might: 4890 // 4891 // - cause end-of-file to fail to be detected on some file 4892 // descriptors, resulting in mysterious hangs, or 4893 // 4894 // - might cause an fopen in the subprocess to fail on a system 4895 // suffering from bug 1085341. 4896 // 4897 // (Yes, the default setting of the close-on-exec flag is a Unix 4898 // design flaw) 4899 // 4900 // See: 4901 // 1085341: 32-bit stdio routines should support file descriptors >255 4902 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4903 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4904 // 4905#ifdef FD_CLOEXEC 4906 { 4907 int flags = ::fcntl(fd, F_GETFD); 4908 if (flags != -1) { 4909 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4910 } 4911 } 4912#endif 4913 4914 return fd; 4915} 4916 4917// create binary file, rewriting existing file if required 4918int os::create_binary_file(const char* path, bool rewrite_existing) { 4919 int oflags = O_WRONLY | O_CREAT; 4920 if (!rewrite_existing) { 4921 oflags |= O_EXCL; 4922 } 4923 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4924} 4925 4926// return current position of file pointer 4927jlong os::current_file_offset(int fd) { 4928 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4929} 4930 4931// move file pointer to the specified offset 4932jlong os::seek_to_file_offset(int fd, jlong offset) { 4933 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4934} 4935 4936jlong os::lseek(int fd, jlong offset, int whence) { 4937 return (jlong) ::lseek64(fd, offset, whence); 4938} 4939 4940char * os::native_path(char *path) { 4941 return path; 4942} 4943 4944int os::ftruncate(int fd, jlong length) { 4945 return ::ftruncate64(fd, length); 4946} 4947 4948int os::fsync(int fd) { 4949 RESTARTABLE_RETURN_INT(::fsync(fd)); 4950} 4951 4952int os::available(int fd, jlong *bytes) { 4953 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4954 "Assumed _thread_in_native"); 4955 jlong cur, end; 4956 int mode; 4957 struct stat64 buf64; 4958 4959 if (::fstat64(fd, &buf64) >= 0) { 4960 mode = buf64.st_mode; 4961 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4962 int n,ioctl_return; 4963 4964 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4965 if (ioctl_return>= 0) { 4966 *bytes = n; 4967 return 1; 4968 } 4969 } 4970 } 4971 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4972 return 0; 4973 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4974 return 0; 4975 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4976 return 0; 4977 } 4978 *bytes = end - cur; 4979 return 1; 4980} 4981 4982// Map a block of memory. 4983char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4984 char *addr, size_t bytes, bool read_only, 4985 bool allow_exec) { 4986 int prot; 4987 int flags; 4988 4989 if (read_only) { 4990 prot = PROT_READ; 4991 flags = MAP_SHARED; 4992 } else { 4993 prot = PROT_READ | PROT_WRITE; 4994 flags = MAP_PRIVATE; 4995 } 4996 4997 if (allow_exec) { 4998 prot |= PROT_EXEC; 4999 } 5000 5001 if (addr != NULL) { 5002 flags |= MAP_FIXED; 5003 } 5004 5005 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5006 fd, file_offset); 5007 if (mapped_address == MAP_FAILED) { 5008 return NULL; 5009 } 5010 return mapped_address; 5011} 5012 5013 5014// Remap a block of memory. 5015char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5016 char *addr, size_t bytes, bool read_only, 5017 bool allow_exec) { 5018 // same as map_memory() on this OS 5019 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5020 allow_exec); 5021} 5022 5023 5024// Unmap a block of memory. 5025bool os::pd_unmap_memory(char* addr, size_t bytes) { 5026 return munmap(addr, bytes) == 0; 5027} 5028 5029void os::pause() { 5030 char filename[MAX_PATH]; 5031 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5032 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5033 } else { 5034 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5035 } 5036 5037 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5038 if (fd != -1) { 5039 struct stat buf; 5040 ::close(fd); 5041 while (::stat(filename, &buf) == 0) { 5042 (void)::poll(NULL, 0, 100); 5043 } 5044 } else { 5045 jio_fprintf(stderr, 5046 "Could not open pause file '%s', continuing immediately.\n", filename); 5047 } 5048} 5049 5050#ifndef PRODUCT 5051#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5052// Turn this on if you need to trace synch operations. 5053// Set RECORD_SYNCH_LIMIT to a large-enough value, 5054// and call record_synch_enable and record_synch_disable 5055// around the computation of interest. 5056 5057void record_synch(char* name, bool returning); // defined below 5058 5059class RecordSynch { 5060 char* _name; 5061 public: 5062 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 5063 ~RecordSynch() { record_synch(_name, true); } 5064}; 5065 5066#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5067extern "C" ret name params { \ 5068 typedef ret name##_t params; \ 5069 static name##_t* implem = NULL; \ 5070 static int callcount = 0; \ 5071 if (implem == NULL) { \ 5072 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5073 if (implem == NULL) fatal(dlerror()); \ 5074 } \ 5075 ++callcount; \ 5076 RecordSynch _rs(#name); \ 5077 inner; \ 5078 return implem args; \ 5079} 5080// in dbx, examine callcounts this way: 5081// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5082 5083#define CHECK_POINTER_OK(p) \ 5084 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5085#define CHECK_MU \ 5086 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5087#define CHECK_CV \ 5088 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5089#define CHECK_P(p) \ 5090 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5091 5092#define CHECK_MUTEX(mutex_op) \ 5093 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5094 5095CHECK_MUTEX( mutex_lock) 5096CHECK_MUTEX( _mutex_lock) 5097CHECK_MUTEX( mutex_unlock) 5098CHECK_MUTEX(_mutex_unlock) 5099CHECK_MUTEX( mutex_trylock) 5100CHECK_MUTEX(_mutex_trylock) 5101 5102#define CHECK_COND(cond_op) \ 5103 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 5104 5105CHECK_COND( cond_wait); 5106CHECK_COND(_cond_wait); 5107CHECK_COND(_cond_wait_cancel); 5108 5109#define CHECK_COND2(cond_op) \ 5110 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 5111 5112CHECK_COND2( cond_timedwait); 5113CHECK_COND2(_cond_timedwait); 5114CHECK_COND2(_cond_timedwait_cancel); 5115 5116// do the _lwp_* versions too 5117#define mutex_t lwp_mutex_t 5118#define cond_t lwp_cond_t 5119CHECK_MUTEX( _lwp_mutex_lock) 5120CHECK_MUTEX( _lwp_mutex_unlock) 5121CHECK_MUTEX( _lwp_mutex_trylock) 5122CHECK_MUTEX( __lwp_mutex_lock) 5123CHECK_MUTEX( __lwp_mutex_unlock) 5124CHECK_MUTEX( __lwp_mutex_trylock) 5125CHECK_MUTEX(___lwp_mutex_lock) 5126CHECK_MUTEX(___lwp_mutex_unlock) 5127 5128CHECK_COND( _lwp_cond_wait); 5129CHECK_COND( __lwp_cond_wait); 5130CHECK_COND(___lwp_cond_wait); 5131 5132CHECK_COND2( _lwp_cond_timedwait); 5133CHECK_COND2( __lwp_cond_timedwait); 5134#undef mutex_t 5135#undef cond_t 5136 5137CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5138CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5139CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5140CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5141CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5142CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5143CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5144CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5145 5146 5147// recording machinery: 5148 5149enum { RECORD_SYNCH_LIMIT = 200 }; 5150char* record_synch_name[RECORD_SYNCH_LIMIT]; 5151void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5152bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5153thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5154int record_synch_count = 0; 5155bool record_synch_enabled = false; 5156 5157// in dbx, examine recorded data this way: 5158// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5159 5160void record_synch(char* name, bool returning) { 5161 if (record_synch_enabled) { 5162 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5163 record_synch_name[record_synch_count] = name; 5164 record_synch_returning[record_synch_count] = returning; 5165 record_synch_thread[record_synch_count] = thr_self(); 5166 record_synch_arg0ptr[record_synch_count] = &name; 5167 record_synch_count++; 5168 } 5169 // put more checking code here: 5170 // ... 5171 } 5172} 5173 5174void record_synch_enable() { 5175 // start collecting trace data, if not already doing so 5176 if (!record_synch_enabled) record_synch_count = 0; 5177 record_synch_enabled = true; 5178} 5179 5180void record_synch_disable() { 5181 // stop collecting trace data 5182 record_synch_enabled = false; 5183} 5184 5185#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5186#endif // PRODUCT 5187 5188const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5189const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5190 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5191 5192 5193// JVMTI & JVM monitoring and management support 5194// The thread_cpu_time() and current_thread_cpu_time() are only 5195// supported if is_thread_cpu_time_supported() returns true. 5196// They are not supported on Solaris T1. 5197 5198// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5199// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5200// of a thread. 5201// 5202// current_thread_cpu_time() and thread_cpu_time(Thread *) 5203// returns the fast estimate available on the platform. 5204 5205// hrtime_t gethrvtime() return value includes 5206// user time but does not include system time 5207jlong os::current_thread_cpu_time() { 5208 return (jlong) gethrvtime(); 5209} 5210 5211jlong os::thread_cpu_time(Thread *thread) { 5212 // return user level CPU time only to be consistent with 5213 // what current_thread_cpu_time returns. 5214 // thread_cpu_time_info() must be changed if this changes 5215 return os::thread_cpu_time(thread, false /* user time only */); 5216} 5217 5218jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5219 if (user_sys_cpu_time) { 5220 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5221 } else { 5222 return os::current_thread_cpu_time(); 5223 } 5224} 5225 5226jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5227 char proc_name[64]; 5228 int count; 5229 prusage_t prusage; 5230 jlong lwp_time; 5231 int fd; 5232 5233 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5234 getpid(), 5235 thread->osthread()->lwp_id()); 5236 fd = ::open(proc_name, O_RDONLY); 5237 if (fd == -1) return -1; 5238 5239 do { 5240 count = ::pread(fd, 5241 (void *)&prusage.pr_utime, 5242 thr_time_size, 5243 thr_time_off); 5244 } while (count < 0 && errno == EINTR); 5245 ::close(fd); 5246 if (count < 0) return -1; 5247 5248 if (user_sys_cpu_time) { 5249 // user + system CPU time 5250 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5251 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5252 (jlong)prusage.pr_stime.tv_nsec + 5253 (jlong)prusage.pr_utime.tv_nsec; 5254 } else { 5255 // user level CPU time only 5256 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5257 (jlong)prusage.pr_utime.tv_nsec; 5258 } 5259 5260 return (lwp_time); 5261} 5262 5263void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5264 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5265 info_ptr->may_skip_backward = false; // elapsed time not wall time 5266 info_ptr->may_skip_forward = false; // elapsed time not wall time 5267 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5268} 5269 5270void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5271 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5272 info_ptr->may_skip_backward = false; // elapsed time not wall time 5273 info_ptr->may_skip_forward = false; // elapsed time not wall time 5274 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5275} 5276 5277bool os::is_thread_cpu_time_supported() { 5278 return true; 5279} 5280 5281// System loadavg support. Returns -1 if load average cannot be obtained. 5282// Return the load average for our processor set if the primitive exists 5283// (Solaris 9 and later). Otherwise just return system wide loadavg. 5284int os::loadavg(double loadavg[], int nelem) { 5285 if (pset_getloadavg_ptr != NULL) { 5286 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5287 } else { 5288 return ::getloadavg(loadavg, nelem); 5289 } 5290} 5291 5292//--------------------------------------------------------------------------------- 5293 5294bool os::find(address addr, outputStream* st) { 5295 Dl_info dlinfo; 5296 memset(&dlinfo, 0, sizeof(dlinfo)); 5297 if (dladdr(addr, &dlinfo) != 0) { 5298 st->print(PTR_FORMAT ": ", addr); 5299 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5300 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5301 } else if (dlinfo.dli_fbase != NULL) { 5302 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5303 } else { 5304 st->print("<absolute address>"); 5305 } 5306 if (dlinfo.dli_fname != NULL) { 5307 st->print(" in %s", dlinfo.dli_fname); 5308 } 5309 if (dlinfo.dli_fbase != NULL) { 5310 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5311 } 5312 st->cr(); 5313 5314 if (Verbose) { 5315 // decode some bytes around the PC 5316 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5317 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5318 address lowest = (address) dlinfo.dli_sname; 5319 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5320 if (begin < lowest) begin = lowest; 5321 Dl_info dlinfo2; 5322 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5323 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5324 end = (address) dlinfo2.dli_saddr; 5325 } 5326 Disassembler::decode(begin, end, st); 5327 } 5328 return true; 5329 } 5330 return false; 5331} 5332 5333// Following function has been added to support HotSparc's libjvm.so running 5334// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5335// src/solaris/hpi/native_threads in the EVM codebase. 5336// 5337// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5338// libraries and should thus be removed. We will leave it behind for a while 5339// until we no longer want to able to run on top of 1.3.0 Solaris production 5340// JDK. See 4341971. 5341 5342#define STACK_SLACK 0x800 5343 5344extern "C" { 5345 intptr_t sysThreadAvailableStackWithSlack() { 5346 stack_t st; 5347 intptr_t retval, stack_top; 5348 retval = thr_stksegment(&st); 5349 assert(retval == 0, "incorrect return value from thr_stksegment"); 5350 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5351 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5352 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5353 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5354 } 5355} 5356 5357// ObjectMonitor park-unpark infrastructure ... 5358// 5359// We implement Solaris and Linux PlatformEvents with the 5360// obvious condvar-mutex-flag triple. 5361// Another alternative that works quite well is pipes: 5362// Each PlatformEvent consists of a pipe-pair. 5363// The thread associated with the PlatformEvent 5364// calls park(), which reads from the input end of the pipe. 5365// Unpark() writes into the other end of the pipe. 5366// The write-side of the pipe must be set NDELAY. 5367// Unfortunately pipes consume a large # of handles. 5368// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5369// Using pipes for the 1st few threads might be workable, however. 5370// 5371// park() is permitted to return spuriously. 5372// Callers of park() should wrap the call to park() in 5373// an appropriate loop. A litmus test for the correct 5374// usage of park is the following: if park() were modified 5375// to immediately return 0 your code should still work, 5376// albeit degenerating to a spin loop. 5377// 5378// An interesting optimization for park() is to use a trylock() 5379// to attempt to acquire the mutex. If the trylock() fails 5380// then we know that a concurrent unpark() operation is in-progress. 5381// in that case the park() code could simply set _count to 0 5382// and return immediately. The subsequent park() operation *might* 5383// return immediately. That's harmless as the caller of park() is 5384// expected to loop. By using trylock() we will have avoided a 5385// avoided a context switch caused by contention on the per-thread mutex. 5386// 5387// TODO-FIXME: 5388// 1. Reconcile Doug's JSR166 j.u.c park-unpark with the 5389// objectmonitor implementation. 5390// 2. Collapse the JSR166 parker event, and the 5391// objectmonitor ParkEvent into a single "Event" construct. 5392// 3. In park() and unpark() add: 5393// assert (Thread::current() == AssociatedWith). 5394// 4. add spurious wakeup injection on a -XX:EarlyParkReturn=N switch. 5395// 1-out-of-N park() operations will return immediately. 5396// 5397// _Event transitions in park() 5398// -1 => -1 : illegal 5399// 1 => 0 : pass - return immediately 5400// 0 => -1 : block 5401// 5402// _Event serves as a restricted-range semaphore. 5403// 5404// Another possible encoding of _Event would be with 5405// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5406// 5407// TODO-FIXME: add DTRACE probes for: 5408// 1. Tx parks 5409// 2. Ty unparks Tx 5410// 3. Tx resumes from park 5411 5412 5413// value determined through experimentation 5414#define ROUNDINGFIX 11 5415 5416// utility to compute the abstime argument to timedwait. 5417// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5418 5419static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5420 // millis is the relative timeout time 5421 // abstime will be the absolute timeout time 5422 if (millis < 0) millis = 0; 5423 struct timeval now; 5424 int status = gettimeofday(&now, NULL); 5425 assert(status == 0, "gettimeofday"); 5426 jlong seconds = millis / 1000; 5427 jlong max_wait_period; 5428 5429 if (UseLWPSynchronization) { 5430 // forward port of fix for 4275818 (not sleeping long enough) 5431 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5432 // _lwp_cond_timedwait() used a round_down algorithm rather 5433 // than a round_up. For millis less than our roundfactor 5434 // it rounded down to 0 which doesn't meet the spec. 5435 // For millis > roundfactor we may return a bit sooner, but 5436 // since we can not accurately identify the patch level and 5437 // this has already been fixed in Solaris 9 and 8 we will 5438 // leave it alone rather than always rounding down. 5439 5440 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5441 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5442 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5443 max_wait_period = 21000000; 5444 } else { 5445 max_wait_period = 50000000; 5446 } 5447 millis %= 1000; 5448 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5449 seconds = max_wait_period; 5450 } 5451 abstime->tv_sec = now.tv_sec + seconds; 5452 long usec = now.tv_usec + millis * 1000; 5453 if (usec >= 1000000) { 5454 abstime->tv_sec += 1; 5455 usec -= 1000000; 5456 } 5457 abstime->tv_nsec = usec * 1000; 5458 return abstime; 5459} 5460 5461void os::PlatformEvent::park() { // AKA: down() 5462 // Invariant: Only the thread associated with the Event/PlatformEvent 5463 // may call park(). 5464 assert(_nParked == 0, "invariant"); 5465 5466 int v; 5467 for (;;) { 5468 v = _Event; 5469 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5470 } 5471 guarantee(v >= 0, "invariant"); 5472 if (v == 0) { 5473 // Do this the hard way by blocking ... 5474 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5475 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5476 // Only for SPARC >= V8PlusA 5477#if defined(__sparc) && defined(COMPILER2) 5478 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5479#endif 5480 int status = os::Solaris::mutex_lock(_mutex); 5481 assert_status(status == 0, status, "mutex_lock"); 5482 guarantee(_nParked == 0, "invariant"); 5483 ++_nParked; 5484 while (_Event < 0) { 5485 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5486 // Treat this the same as if the wait was interrupted 5487 // With usr/lib/lwp going to kernel, always handle ETIME 5488 status = os::Solaris::cond_wait(_cond, _mutex); 5489 if (status == ETIME) status = EINTR; 5490 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5491 } 5492 --_nParked; 5493 _Event = 0; 5494 status = os::Solaris::mutex_unlock(_mutex); 5495 assert_status(status == 0, status, "mutex_unlock"); 5496 // Paranoia to ensure our locked and lock-free paths interact 5497 // correctly with each other. 5498 OrderAccess::fence(); 5499 } 5500} 5501 5502int os::PlatformEvent::park(jlong millis) { 5503 guarantee(_nParked == 0, "invariant"); 5504 int v; 5505 for (;;) { 5506 v = _Event; 5507 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5508 } 5509 guarantee(v >= 0, "invariant"); 5510 if (v != 0) return OS_OK; 5511 5512 int ret = OS_TIMEOUT; 5513 timestruc_t abst; 5514 compute_abstime(&abst, millis); 5515 5516 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5517 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5518 // Only for SPARC >= V8PlusA 5519#if defined(__sparc) && defined(COMPILER2) 5520 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5521#endif 5522 int status = os::Solaris::mutex_lock(_mutex); 5523 assert_status(status == 0, status, "mutex_lock"); 5524 guarantee(_nParked == 0, "invariant"); 5525 ++_nParked; 5526 while (_Event < 0) { 5527 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5528 assert_status(status == 0 || status == EINTR || 5529 status == ETIME || status == ETIMEDOUT, 5530 status, "cond_timedwait"); 5531 if (!FilterSpuriousWakeups) break; // previous semantics 5532 if (status == ETIME || status == ETIMEDOUT) break; 5533 // We consume and ignore EINTR and spurious wakeups. 5534 } 5535 --_nParked; 5536 if (_Event >= 0) ret = OS_OK; 5537 _Event = 0; 5538 status = os::Solaris::mutex_unlock(_mutex); 5539 assert_status(status == 0, status, "mutex_unlock"); 5540 // Paranoia to ensure our locked and lock-free paths interact 5541 // correctly with each other. 5542 OrderAccess::fence(); 5543 return ret; 5544} 5545 5546void os::PlatformEvent::unpark() { 5547 // Transitions for _Event: 5548 // 0 :=> 1 5549 // 1 :=> 1 5550 // -1 :=> either 0 or 1; must signal target thread 5551 // That is, we can safely transition _Event from -1 to either 5552 // 0 or 1. 5553 // See also: "Semaphores in Plan 9" by Mullender & Cox 5554 // 5555 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5556 // that it will take two back-to-back park() calls for the owning 5557 // thread to block. This has the benefit of forcing a spurious return 5558 // from the first park() call after an unpark() call which will help 5559 // shake out uses of park() and unpark() without condition variables. 5560 5561 if (Atomic::xchg(1, &_Event) >= 0) return; 5562 5563 // If the thread associated with the event was parked, wake it. 5564 // Wait for the thread assoc with the PlatformEvent to vacate. 5565 int status = os::Solaris::mutex_lock(_mutex); 5566 assert_status(status == 0, status, "mutex_lock"); 5567 int AnyWaiters = _nParked; 5568 status = os::Solaris::mutex_unlock(_mutex); 5569 assert_status(status == 0, status, "mutex_unlock"); 5570 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5571 if (AnyWaiters != 0) { 5572 // We intentional signal *after* dropping the lock 5573 // to avoid a common class of futile wakeups. 5574 status = os::Solaris::cond_signal(_cond); 5575 assert_status(status == 0, status, "cond_signal"); 5576 } 5577} 5578 5579// JSR166 5580// ------------------------------------------------------- 5581 5582// The solaris and linux implementations of park/unpark are fairly 5583// conservative for now, but can be improved. They currently use a 5584// mutex/condvar pair, plus _counter. 5585// Park decrements _counter if > 0, else does a condvar wait. Unpark 5586// sets count to 1 and signals condvar. Only one thread ever waits 5587// on the condvar. Contention seen when trying to park implies that someone 5588// is unparking you, so don't wait. And spurious returns are fine, so there 5589// is no need to track notifications. 5590 5591#define MAX_SECS 100000000 5592 5593// This code is common to linux and solaris and will be moved to a 5594// common place in dolphin. 5595// 5596// The passed in time value is either a relative time in nanoseconds 5597// or an absolute time in milliseconds. Either way it has to be unpacked 5598// into suitable seconds and nanoseconds components and stored in the 5599// given timespec structure. 5600// Given time is a 64-bit value and the time_t used in the timespec is only 5601// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5602// overflow if times way in the future are given. Further on Solaris versions 5603// prior to 10 there is a restriction (see cond_timedwait) that the specified 5604// number of seconds, in abstime, is less than current_time + 100,000,000. 5605// As it will be 28 years before "now + 100000000" will overflow we can 5606// ignore overflow and just impose a hard-limit on seconds using the value 5607// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5608// years from "now". 5609// 5610static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5611 assert(time > 0, "convertTime"); 5612 5613 struct timeval now; 5614 int status = gettimeofday(&now, NULL); 5615 assert(status == 0, "gettimeofday"); 5616 5617 time_t max_secs = now.tv_sec + MAX_SECS; 5618 5619 if (isAbsolute) { 5620 jlong secs = time / 1000; 5621 if (secs > max_secs) { 5622 absTime->tv_sec = max_secs; 5623 } else { 5624 absTime->tv_sec = secs; 5625 } 5626 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5627 } else { 5628 jlong secs = time / NANOSECS_PER_SEC; 5629 if (secs >= MAX_SECS) { 5630 absTime->tv_sec = max_secs; 5631 absTime->tv_nsec = 0; 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 // Ideally we'd do something useful while spinning, such 5649 // as calling unpackTime(). 5650 5651 // Optional fast-path check: 5652 // Return immediately if a permit is available. 5653 // We depend on Atomic::xchg() having full barrier semantics 5654 // since we are doing a lock-free update to _counter. 5655 if (Atomic::xchg(0, &_counter) > 0) return; 5656 5657 // Optional fast-exit: Check interrupt before trying to wait 5658 Thread* thread = Thread::current(); 5659 assert(thread->is_Java_thread(), "Must be JavaThread"); 5660 JavaThread *jt = (JavaThread *)thread; 5661 if (Thread::is_interrupted(thread, false)) { 5662 return; 5663 } 5664 5665 // First, demultiplex/decode time arguments 5666 timespec absTime; 5667 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5668 return; 5669 } 5670 if (time > 0) { 5671 // Warning: this code might be exposed to the old Solaris time 5672 // round-down bugs. Grep "roundingFix" for details. 5673 unpackTime(&absTime, isAbsolute, time); 5674 } 5675 5676 // Enter safepoint region 5677 // Beware of deadlocks such as 6317397. 5678 // The per-thread Parker:: _mutex is a classic leaf-lock. 5679 // In particular a thread must never block on the Threads_lock while 5680 // holding the Parker:: mutex. If safepoints are pending both the 5681 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5682 ThreadBlockInVM tbivm(jt); 5683 5684 // Don't wait if cannot get lock since interference arises from 5685 // unblocking. Also. check interrupt before trying wait 5686 if (Thread::is_interrupted(thread, false) || 5687 os::Solaris::mutex_trylock(_mutex) != 0) { 5688 return; 5689 } 5690 5691 int status; 5692 5693 if (_counter > 0) { // no wait needed 5694 _counter = 0; 5695 status = os::Solaris::mutex_unlock(_mutex); 5696 assert(status == 0, "invariant"); 5697 // Paranoia to ensure our locked and lock-free paths interact 5698 // correctly with each other and Java-level accesses. 5699 OrderAccess::fence(); 5700 return; 5701 } 5702 5703#ifdef ASSERT 5704 // Don't catch signals while blocked; let the running threads have the signals. 5705 // (This allows a debugger to break into the running thread.) 5706 sigset_t oldsigs; 5707 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5708 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5709#endif 5710 5711 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5712 jt->set_suspend_equivalent(); 5713 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5714 5715 // Do this the hard way by blocking ... 5716 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5717 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5718 // Only for SPARC >= V8PlusA 5719#if defined(__sparc) && defined(COMPILER2) 5720 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5721#endif 5722 5723 if (time == 0) { 5724 status = os::Solaris::cond_wait(_cond, _mutex); 5725 } else { 5726 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5727 } 5728 // Note that an untimed cond_wait() can sometimes return ETIME on older 5729 // versions of the Solaris. 5730 assert_status(status == 0 || status == EINTR || 5731 status == ETIME || status == ETIMEDOUT, 5732 status, "cond_timedwait"); 5733 5734#ifdef ASSERT 5735 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5736#endif 5737 _counter = 0; 5738 status = os::Solaris::mutex_unlock(_mutex); 5739 assert_status(status == 0, status, "mutex_unlock"); 5740 // Paranoia to ensure our locked and lock-free paths interact 5741 // correctly with each other and Java-level accesses. 5742 OrderAccess::fence(); 5743 5744 // If externally suspended while waiting, re-suspend 5745 if (jt->handle_special_suspend_equivalent_condition()) { 5746 jt->java_suspend_self(); 5747 } 5748} 5749 5750void Parker::unpark() { 5751 int status = os::Solaris::mutex_lock(_mutex); 5752 assert(status == 0, "invariant"); 5753 const int s = _counter; 5754 _counter = 1; 5755 status = os::Solaris::mutex_unlock(_mutex); 5756 assert(status == 0, "invariant"); 5757 5758 if (s < 1) { 5759 status = os::Solaris::cond_signal(_cond); 5760 assert(status == 0, "invariant"); 5761 } 5762} 5763 5764extern char** environ; 5765 5766// Run the specified command in a separate process. Return its exit value, 5767// or -1 on failure (e.g. can't fork a new process). 5768// Unlike system(), this function can be called from signal handler. It 5769// doesn't block SIGINT et al. 5770int os::fork_and_exec(char* cmd) { 5771 char * argv[4]; 5772 argv[0] = (char *)"sh"; 5773 argv[1] = (char *)"-c"; 5774 argv[2] = cmd; 5775 argv[3] = NULL; 5776 5777 // fork is async-safe, fork1 is not so can't use in signal handler 5778 pid_t pid; 5779 Thread* t = ThreadLocalStorage::get_thread_slow(); 5780 if (t != NULL && t->is_inside_signal_handler()) { 5781 pid = fork(); 5782 } else { 5783 pid = fork1(); 5784 } 5785 5786 if (pid < 0) { 5787 // fork failed 5788 warning("fork failed: %s", strerror(errno)); 5789 return -1; 5790 5791 } else if (pid == 0) { 5792 // child process 5793 5794 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5795 execve("/usr/bin/sh", argv, environ); 5796 5797 // execve failed 5798 _exit(-1); 5799 5800 } else { 5801 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5802 // care about the actual exit code, for now. 5803 5804 int status; 5805 5806 // Wait for the child process to exit. This returns immediately if 5807 // the child has already exited. */ 5808 while (waitpid(pid, &status, 0) < 0) { 5809 switch (errno) { 5810 case ECHILD: return 0; 5811 case EINTR: break; 5812 default: return -1; 5813 } 5814 } 5815 5816 if (WIFEXITED(status)) { 5817 // The child exited normally; get its exit code. 5818 return WEXITSTATUS(status); 5819 } else if (WIFSIGNALED(status)) { 5820 // The child exited because of a signal 5821 // The best value to return is 0x80 + signal number, 5822 // because that is what all Unix shells do, and because 5823 // it allows callers to distinguish between process exit and 5824 // process death by signal. 5825 return 0x80 + WTERMSIG(status); 5826 } else { 5827 // Unknown exit code; pass it through 5828 return status; 5829 } 5830 } 5831} 5832 5833// is_headless_jre() 5834// 5835// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5836// in order to report if we are running in a headless jre 5837// 5838// Since JDK8 xawt/libmawt.so was moved into the same directory 5839// as libawt.so, and renamed libawt_xawt.so 5840// 5841bool os::is_headless_jre() { 5842 struct stat statbuf; 5843 char buf[MAXPATHLEN]; 5844 char libmawtpath[MAXPATHLEN]; 5845 const char *xawtstr = "/xawt/libmawt.so"; 5846 const char *new_xawtstr = "/libawt_xawt.so"; 5847 char *p; 5848 5849 // Get path to libjvm.so 5850 os::jvm_path(buf, sizeof(buf)); 5851 5852 // Get rid of libjvm.so 5853 p = strrchr(buf, '/'); 5854 if (p == NULL) { 5855 return false; 5856 } else { 5857 *p = '\0'; 5858 } 5859 5860 // Get rid of client or server 5861 p = strrchr(buf, '/'); 5862 if (p == NULL) { 5863 return false; 5864 } else { 5865 *p = '\0'; 5866 } 5867 5868 // check xawt/libmawt.so 5869 strcpy(libmawtpath, buf); 5870 strcat(libmawtpath, xawtstr); 5871 if (::stat(libmawtpath, &statbuf) == 0) return false; 5872 5873 // check libawt_xawt.so 5874 strcpy(libmawtpath, buf); 5875 strcat(libmawtpath, new_xawtstr); 5876 if (::stat(libmawtpath, &statbuf) == 0) return false; 5877 5878 return true; 5879} 5880 5881size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5882 size_t res; 5883 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5884 "Assumed _thread_in_native"); 5885 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5886 return res; 5887} 5888 5889int os::close(int fd) { 5890 return ::close(fd); 5891} 5892 5893int os::socket_close(int fd) { 5894 return ::close(fd); 5895} 5896 5897int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5898 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5899 "Assumed _thread_in_native"); 5900 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5901} 5902 5903int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5904 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5905 "Assumed _thread_in_native"); 5906 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5907} 5908 5909int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5910 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5911} 5912 5913// As both poll and select can be interrupted by signals, we have to be 5914// prepared to restart the system call after updating the timeout, unless 5915// a poll() is done with timeout == -1, in which case we repeat with this 5916// "wait forever" value. 5917 5918int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5919 int _result; 5920 _result = ::connect(fd, him, len); 5921 5922 // On Solaris, when a connect() call is interrupted, the connection 5923 // can be established asynchronously (see 6343810). Subsequent calls 5924 // to connect() must check the errno value which has the semantic 5925 // described below (copied from the connect() man page). Handling 5926 // of asynchronously established connections is required for both 5927 // blocking and non-blocking sockets. 5928 // EINTR The connection attempt was interrupted 5929 // before any data arrived by the delivery of 5930 // a signal. The connection, however, will be 5931 // established asynchronously. 5932 // 5933 // EINPROGRESS The socket is non-blocking, and the connec- 5934 // tion cannot be completed immediately. 5935 // 5936 // EALREADY The socket is non-blocking, and a previous 5937 // connection attempt has not yet been com- 5938 // pleted. 5939 // 5940 // EISCONN The socket is already connected. 5941 if (_result == OS_ERR && errno == EINTR) { 5942 // restarting a connect() changes its errno semantics 5943 RESTARTABLE(::connect(fd, him, len), _result); 5944 // undo these changes 5945 if (_result == OS_ERR) { 5946 if (errno == EALREADY) { 5947 errno = EINPROGRESS; // fall through 5948 } else if (errno == EISCONN) { 5949 errno = 0; 5950 return OS_OK; 5951 } 5952 } 5953 } 5954 return _result; 5955} 5956 5957// Get the default path to the core file 5958// Returns the length of the string 5959int os::get_core_path(char* buffer, size_t bufferSize) { 5960 const char* p = get_current_directory(buffer, bufferSize); 5961 5962 if (p == NULL) { 5963 assert(p != NULL, "failed to get current directory"); 5964 return 0; 5965 } 5966 5967 return strlen(buffer); 5968} 5969 5970#ifndef PRODUCT 5971void TestReserveMemorySpecial_test() { 5972 // No tests available for this platform 5973} 5974#endif 5975