os_solaris.cpp revision 7377:c42a0b8babb4
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 saved_jvm_path[MAXPATHLEN - 1] = '\0'; 2225} 2226 2227 2228void os::print_jni_name_prefix_on(outputStream* st, int args_size) { 2229 // no prefix required, not even "_" 2230} 2231 2232 2233void os::print_jni_name_suffix_on(outputStream* st, int args_size) { 2234 // no suffix required 2235} 2236 2237// This method is a copy of JDK's sysGetLastErrorString 2238// from src/solaris/hpi/src/system_md.c 2239 2240size_t os::lasterror(char *buf, size_t len) { 2241 if (errno == 0) return 0; 2242 2243 const char *s = ::strerror(errno); 2244 size_t n = ::strlen(s); 2245 if (n >= len) { 2246 n = len - 1; 2247 } 2248 ::strncpy(buf, s, n); 2249 buf[n] = '\0'; 2250 return n; 2251} 2252 2253 2254// sun.misc.Signal 2255 2256extern "C" { 2257 static void UserHandler(int sig, void *siginfo, void *context) { 2258 // Ctrl-C is pressed during error reporting, likely because the error 2259 // handler fails to abort. Let VM die immediately. 2260 if (sig == SIGINT && is_error_reported()) { 2261 os::die(); 2262 } 2263 2264 os::signal_notify(sig); 2265 // We do not need to reinstate the signal handler each time... 2266 } 2267} 2268 2269void* os::user_handler() { 2270 return CAST_FROM_FN_PTR(void*, UserHandler); 2271} 2272 2273class Semaphore : public StackObj { 2274 public: 2275 Semaphore(); 2276 ~Semaphore(); 2277 void signal(); 2278 void wait(); 2279 bool trywait(); 2280 bool timedwait(unsigned int sec, int nsec); 2281 private: 2282 sema_t _semaphore; 2283}; 2284 2285 2286Semaphore::Semaphore() { 2287 sema_init(&_semaphore, 0, NULL, NULL); 2288} 2289 2290Semaphore::~Semaphore() { 2291 sema_destroy(&_semaphore); 2292} 2293 2294void Semaphore::signal() { 2295 sema_post(&_semaphore); 2296} 2297 2298void Semaphore::wait() { 2299 sema_wait(&_semaphore); 2300} 2301 2302bool Semaphore::trywait() { 2303 return sema_trywait(&_semaphore) == 0; 2304} 2305 2306bool Semaphore::timedwait(unsigned int sec, int nsec) { 2307 struct timespec ts; 2308 unpackTime(&ts, false, (sec * NANOSECS_PER_SEC) + nsec); 2309 2310 while (1) { 2311 int result = sema_timedwait(&_semaphore, &ts); 2312 if (result == 0) { 2313 return true; 2314 } else if (errno == EINTR) { 2315 continue; 2316 } else if (errno == ETIME) { 2317 return false; 2318 } else { 2319 return false; 2320 } 2321 } 2322} 2323 2324extern "C" { 2325 typedef void (*sa_handler_t)(int); 2326 typedef void (*sa_sigaction_t)(int, siginfo_t *, void *); 2327} 2328 2329void* os::signal(int signal_number, void* handler) { 2330 struct sigaction sigAct, oldSigAct; 2331 sigfillset(&(sigAct.sa_mask)); 2332 sigAct.sa_flags = SA_RESTART & ~SA_RESETHAND; 2333 sigAct.sa_handler = CAST_TO_FN_PTR(sa_handler_t, handler); 2334 2335 if (sigaction(signal_number, &sigAct, &oldSigAct)) { 2336 // -1 means registration failed 2337 return (void *)-1; 2338 } 2339 2340 return CAST_FROM_FN_PTR(void*, oldSigAct.sa_handler); 2341} 2342 2343void os::signal_raise(int signal_number) { 2344 raise(signal_number); 2345} 2346 2347// The following code is moved from os.cpp for making this 2348// code platform specific, which it is by its very nature. 2349 2350// a counter for each possible signal value 2351static int Sigexit = 0; 2352static int Maxlibjsigsigs; 2353static jint *pending_signals = NULL; 2354static int *preinstalled_sigs = NULL; 2355static struct sigaction *chainedsigactions = NULL; 2356static sema_t sig_sem; 2357typedef int (*version_getting_t)(); 2358version_getting_t os::Solaris::get_libjsig_version = NULL; 2359static int libjsigversion = NULL; 2360 2361int os::sigexitnum_pd() { 2362 assert(Sigexit > 0, "signal memory not yet initialized"); 2363 return Sigexit; 2364} 2365 2366void os::Solaris::init_signal_mem() { 2367 // Initialize signal structures 2368 Maxsignum = SIGRTMAX; 2369 Sigexit = Maxsignum+1; 2370 assert(Maxsignum >0, "Unable to obtain max signal number"); 2371 2372 Maxlibjsigsigs = Maxsignum; 2373 2374 // pending_signals has one int per signal 2375 // The additional signal is for SIGEXIT - exit signal to signal_thread 2376 pending_signals = (jint *)os::malloc(sizeof(jint) * (Sigexit+1), mtInternal); 2377 memset(pending_signals, 0, (sizeof(jint) * (Sigexit+1))); 2378 2379 if (UseSignalChaining) { 2380 chainedsigactions = (struct sigaction *)malloc(sizeof(struct sigaction) 2381 * (Maxsignum + 1), mtInternal); 2382 memset(chainedsigactions, 0, (sizeof(struct sigaction) * (Maxsignum + 1))); 2383 preinstalled_sigs = (int *)os::malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2384 memset(preinstalled_sigs, 0, (sizeof(int) * (Maxsignum + 1))); 2385 } 2386 ourSigFlags = (int*)malloc(sizeof(int) * (Maxsignum + 1), mtInternal); 2387 memset(ourSigFlags, 0, sizeof(int) * (Maxsignum + 1)); 2388} 2389 2390void os::signal_init_pd() { 2391 int ret; 2392 2393 ret = ::sema_init(&sig_sem, 0, NULL, NULL); 2394 assert(ret == 0, "sema_init() failed"); 2395} 2396 2397void os::signal_notify(int signal_number) { 2398 int ret; 2399 2400 Atomic::inc(&pending_signals[signal_number]); 2401 ret = ::sema_post(&sig_sem); 2402 assert(ret == 0, "sema_post() failed"); 2403} 2404 2405static int check_pending_signals(bool wait_for_signal) { 2406 int ret; 2407 while (true) { 2408 for (int i = 0; i < Sigexit + 1; i++) { 2409 jint n = pending_signals[i]; 2410 if (n > 0 && n == Atomic::cmpxchg(n - 1, &pending_signals[i], n)) { 2411 return i; 2412 } 2413 } 2414 if (!wait_for_signal) { 2415 return -1; 2416 } 2417 JavaThread *thread = JavaThread::current(); 2418 ThreadBlockInVM tbivm(thread); 2419 2420 bool threadIsSuspended; 2421 do { 2422 thread->set_suspend_equivalent(); 2423 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 2424 while ((ret = ::sema_wait(&sig_sem)) == EINTR) 2425 ; 2426 assert(ret == 0, "sema_wait() failed"); 2427 2428 // were we externally suspended while we were waiting? 2429 threadIsSuspended = thread->handle_special_suspend_equivalent_condition(); 2430 if (threadIsSuspended) { 2431 // The semaphore has been incremented, but while we were waiting 2432 // another thread suspended us. We don't want to continue running 2433 // while suspended because that would surprise the thread that 2434 // suspended us. 2435 ret = ::sema_post(&sig_sem); 2436 assert(ret == 0, "sema_post() failed"); 2437 2438 thread->java_suspend_self(); 2439 } 2440 } while (threadIsSuspended); 2441 } 2442} 2443 2444int os::signal_lookup() { 2445 return check_pending_signals(false); 2446} 2447 2448int os::signal_wait() { 2449 return check_pending_signals(true); 2450} 2451 2452//////////////////////////////////////////////////////////////////////////////// 2453// Virtual Memory 2454 2455static int page_size = -1; 2456 2457// The mmap MAP_ALIGN flag is supported on Solaris 9 and later. init_2() will 2458// clear this var if support is not available. 2459static bool has_map_align = true; 2460 2461int os::vm_page_size() { 2462 assert(page_size != -1, "must call os::init"); 2463 return page_size; 2464} 2465 2466// Solaris allocates memory by pages. 2467int os::vm_allocation_granularity() { 2468 assert(page_size != -1, "must call os::init"); 2469 return page_size; 2470} 2471 2472static bool recoverable_mmap_error(int err) { 2473 // See if the error is one we can let the caller handle. This 2474 // list of errno values comes from the Solaris mmap(2) man page. 2475 switch (err) { 2476 case EBADF: 2477 case EINVAL: 2478 case ENOTSUP: 2479 // let the caller deal with these errors 2480 return true; 2481 2482 default: 2483 // Any remaining errors on this OS can cause our reserved mapping 2484 // to be lost. That can cause confusion where different data 2485 // structures think they have the same memory mapped. The worst 2486 // scenario is if both the VM and a library think they have the 2487 // same memory mapped. 2488 return false; 2489 } 2490} 2491 2492static void warn_fail_commit_memory(char* addr, size_t bytes, bool exec, 2493 int err) { 2494 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2495 ", %d) failed; error='%s' (errno=%d)", addr, bytes, exec, 2496 strerror(err), err); 2497} 2498 2499static void warn_fail_commit_memory(char* addr, size_t bytes, 2500 size_t alignment_hint, bool exec, 2501 int err) { 2502 warning("INFO: os::commit_memory(" PTR_FORMAT ", " SIZE_FORMAT 2503 ", " SIZE_FORMAT ", %d) failed; error='%s' (errno=%d)", addr, bytes, 2504 alignment_hint, exec, strerror(err), err); 2505} 2506 2507int os::Solaris::commit_memory_impl(char* addr, size_t bytes, bool exec) { 2508 int prot = exec ? PROT_READ|PROT_WRITE|PROT_EXEC : PROT_READ|PROT_WRITE; 2509 size_t size = bytes; 2510 char *res = Solaris::mmap_chunk(addr, size, MAP_PRIVATE|MAP_FIXED, prot); 2511 if (res != NULL) { 2512 if (UseNUMAInterleaving) { 2513 numa_make_global(addr, bytes); 2514 } 2515 return 0; 2516 } 2517 2518 int err = errno; // save errno from mmap() call in mmap_chunk() 2519 2520 if (!recoverable_mmap_error(err)) { 2521 warn_fail_commit_memory(addr, bytes, exec, err); 2522 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, "committing reserved memory."); 2523 } 2524 2525 return err; 2526} 2527 2528bool os::pd_commit_memory(char* addr, size_t bytes, bool exec) { 2529 return Solaris::commit_memory_impl(addr, bytes, exec) == 0; 2530} 2531 2532void os::pd_commit_memory_or_exit(char* addr, size_t bytes, bool exec, 2533 const char* mesg) { 2534 assert(mesg != NULL, "mesg must be specified"); 2535 int err = os::Solaris::commit_memory_impl(addr, bytes, exec); 2536 if (err != 0) { 2537 // the caller wants all commit errors to exit with the specified mesg: 2538 warn_fail_commit_memory(addr, bytes, exec, err); 2539 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2540 } 2541} 2542 2543size_t os::Solaris::page_size_for_alignment(size_t alignment) { 2544 assert(is_size_aligned(alignment, (size_t) vm_page_size()), 2545 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, 2546 alignment, (size_t) vm_page_size())); 2547 2548 for (int i = 0; _page_sizes[i] != 0; i++) { 2549 if (is_size_aligned(alignment, _page_sizes[i])) { 2550 return _page_sizes[i]; 2551 } 2552 } 2553 2554 return (size_t) vm_page_size(); 2555} 2556 2557int os::Solaris::commit_memory_impl(char* addr, size_t bytes, 2558 size_t alignment_hint, bool exec) { 2559 int err = Solaris::commit_memory_impl(addr, bytes, exec); 2560 if (err == 0 && UseLargePages && alignment_hint > 0) { 2561 assert(is_size_aligned(bytes, alignment_hint), 2562 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, alignment_hint)); 2563 2564 // The syscall memcntl requires an exact page size (see man memcntl for details). 2565 size_t page_size = page_size_for_alignment(alignment_hint); 2566 if (page_size > (size_t) vm_page_size()) { 2567 (void)Solaris::setup_large_pages(addr, bytes, page_size); 2568 } 2569 } 2570 return err; 2571} 2572 2573bool os::pd_commit_memory(char* addr, size_t bytes, size_t alignment_hint, 2574 bool exec) { 2575 return Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec) == 0; 2576} 2577 2578void os::pd_commit_memory_or_exit(char* addr, size_t bytes, 2579 size_t alignment_hint, bool exec, 2580 const char* mesg) { 2581 assert(mesg != NULL, "mesg must be specified"); 2582 int err = os::Solaris::commit_memory_impl(addr, bytes, alignment_hint, exec); 2583 if (err != 0) { 2584 // the caller wants all commit errors to exit with the specified mesg: 2585 warn_fail_commit_memory(addr, bytes, alignment_hint, exec, err); 2586 vm_exit_out_of_memory(bytes, OOM_MMAP_ERROR, mesg); 2587 } 2588} 2589 2590// Uncommit the pages in a specified region. 2591void os::pd_free_memory(char* addr, size_t bytes, size_t alignment_hint) { 2592 if (madvise(addr, bytes, MADV_FREE) < 0) { 2593 debug_only(warning("MADV_FREE failed.")); 2594 return; 2595 } 2596} 2597 2598bool os::pd_create_stack_guard_pages(char* addr, size_t size) { 2599 return os::commit_memory(addr, size, !ExecMem); 2600} 2601 2602bool os::remove_stack_guard_pages(char* addr, size_t size) { 2603 return os::uncommit_memory(addr, size); 2604} 2605 2606// Change the page size in a given range. 2607void os::pd_realign_memory(char *addr, size_t bytes, size_t alignment_hint) { 2608 assert((intptr_t)addr % alignment_hint == 0, "Address should be aligned."); 2609 assert((intptr_t)(addr + bytes) % alignment_hint == 0, "End should be aligned."); 2610 if (UseLargePages) { 2611 size_t page_size = Solaris::page_size_for_alignment(alignment_hint); 2612 if (page_size > (size_t) vm_page_size()) { 2613 Solaris::setup_large_pages(addr, bytes, page_size); 2614 } 2615 } 2616} 2617 2618// Tell the OS to make the range local to the first-touching LWP 2619void os::numa_make_local(char *addr, size_t bytes, int lgrp_hint) { 2620 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2621 if (madvise(addr, bytes, MADV_ACCESS_LWP) < 0) { 2622 debug_only(warning("MADV_ACCESS_LWP failed.")); 2623 } 2624} 2625 2626// Tell the OS that this range would be accessed from different LWPs. 2627void os::numa_make_global(char *addr, size_t bytes) { 2628 assert((intptr_t)addr % os::vm_page_size() == 0, "Address should be page-aligned."); 2629 if (madvise(addr, bytes, MADV_ACCESS_MANY) < 0) { 2630 debug_only(warning("MADV_ACCESS_MANY failed.")); 2631 } 2632} 2633 2634// Get the number of the locality groups. 2635size_t os::numa_get_groups_num() { 2636 size_t n = Solaris::lgrp_nlgrps(Solaris::lgrp_cookie()); 2637 return n != -1 ? n : 1; 2638} 2639 2640// Get a list of leaf locality groups. A leaf lgroup is group that 2641// doesn't have any children. Typical leaf group is a CPU or a CPU/memory 2642// board. An LWP is assigned to one of these groups upon creation. 2643size_t os::numa_get_leaf_groups(int *ids, size_t size) { 2644 if ((ids[0] = Solaris::lgrp_root(Solaris::lgrp_cookie())) == -1) { 2645 ids[0] = 0; 2646 return 1; 2647 } 2648 int result_size = 0, top = 1, bottom = 0, cur = 0; 2649 for (int k = 0; k < size; k++) { 2650 int r = Solaris::lgrp_children(Solaris::lgrp_cookie(), ids[cur], 2651 (Solaris::lgrp_id_t*)&ids[top], size - top); 2652 if (r == -1) { 2653 ids[0] = 0; 2654 return 1; 2655 } 2656 if (!r) { 2657 // That's a leaf node. 2658 assert(bottom <= cur, "Sanity check"); 2659 // Check if the node has memory 2660 if (Solaris::lgrp_resources(Solaris::lgrp_cookie(), ids[cur], 2661 NULL, 0, LGRP_RSRC_MEM) > 0) { 2662 ids[bottom++] = ids[cur]; 2663 } 2664 } 2665 top += r; 2666 cur++; 2667 } 2668 if (bottom == 0) { 2669 // Handle a situation, when the OS reports no memory available. 2670 // Assume UMA architecture. 2671 ids[0] = 0; 2672 return 1; 2673 } 2674 return bottom; 2675} 2676 2677// Detect the topology change. Typically happens during CPU plugging-unplugging. 2678bool os::numa_topology_changed() { 2679 int is_stale = Solaris::lgrp_cookie_stale(Solaris::lgrp_cookie()); 2680 if (is_stale != -1 && is_stale) { 2681 Solaris::lgrp_fini(Solaris::lgrp_cookie()); 2682 Solaris::lgrp_cookie_t c = Solaris::lgrp_init(Solaris::LGRP_VIEW_CALLER); 2683 assert(c != 0, "Failure to initialize LGRP API"); 2684 Solaris::set_lgrp_cookie(c); 2685 return true; 2686 } 2687 return false; 2688} 2689 2690// Get the group id of the current LWP. 2691int os::numa_get_group_id() { 2692 int lgrp_id = Solaris::lgrp_home(P_LWPID, P_MYID); 2693 if (lgrp_id == -1) { 2694 return 0; 2695 } 2696 const int size = os::numa_get_groups_num(); 2697 int *ids = (int*)alloca(size * sizeof(int)); 2698 2699 // Get the ids of all lgroups with memory; r is the count. 2700 int r = Solaris::lgrp_resources(Solaris::lgrp_cookie(), lgrp_id, 2701 (Solaris::lgrp_id_t*)ids, size, LGRP_RSRC_MEM); 2702 if (r <= 0) { 2703 return 0; 2704 } 2705 return ids[os::random() % r]; 2706} 2707 2708// Request information about the page. 2709bool os::get_page_info(char *start, page_info* info) { 2710 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2711 uint64_t addr = (uintptr_t)start; 2712 uint64_t outdata[2]; 2713 uint_t validity = 0; 2714 2715 if (os::Solaris::meminfo(&addr, 1, info_types, 2, outdata, &validity) < 0) { 2716 return false; 2717 } 2718 2719 info->size = 0; 2720 info->lgrp_id = -1; 2721 2722 if ((validity & 1) != 0) { 2723 if ((validity & 2) != 0) { 2724 info->lgrp_id = outdata[0]; 2725 } 2726 if ((validity & 4) != 0) { 2727 info->size = outdata[1]; 2728 } 2729 return true; 2730 } 2731 return false; 2732} 2733 2734// Scan the pages from start to end until a page different than 2735// the one described in the info parameter is encountered. 2736char *os::scan_pages(char *start, char* end, page_info* page_expected, 2737 page_info* page_found) { 2738 const uint_t info_types[] = { MEMINFO_VLGRP, MEMINFO_VPAGESIZE }; 2739 const size_t types = sizeof(info_types) / sizeof(info_types[0]); 2740 uint64_t addrs[MAX_MEMINFO_CNT], outdata[types * MAX_MEMINFO_CNT + 1]; 2741 uint_t validity[MAX_MEMINFO_CNT]; 2742 2743 size_t page_size = MAX2((size_t)os::vm_page_size(), page_expected->size); 2744 uint64_t p = (uint64_t)start; 2745 while (p < (uint64_t)end) { 2746 addrs[0] = p; 2747 size_t addrs_count = 1; 2748 while (addrs_count < MAX_MEMINFO_CNT && addrs[addrs_count - 1] + page_size < (uint64_t)end) { 2749 addrs[addrs_count] = addrs[addrs_count - 1] + page_size; 2750 addrs_count++; 2751 } 2752 2753 if (os::Solaris::meminfo(addrs, addrs_count, info_types, types, outdata, validity) < 0) { 2754 return NULL; 2755 } 2756 2757 size_t i = 0; 2758 for (; i < addrs_count; i++) { 2759 if ((validity[i] & 1) != 0) { 2760 if ((validity[i] & 4) != 0) { 2761 if (outdata[types * i + 1] != page_expected->size) { 2762 break; 2763 } 2764 } else if (page_expected->size != 0) { 2765 break; 2766 } 2767 2768 if ((validity[i] & 2) != 0 && page_expected->lgrp_id > 0) { 2769 if (outdata[types * i] != page_expected->lgrp_id) { 2770 break; 2771 } 2772 } 2773 } else { 2774 return NULL; 2775 } 2776 } 2777 2778 if (i < addrs_count) { 2779 if ((validity[i] & 2) != 0) { 2780 page_found->lgrp_id = outdata[types * i]; 2781 } else { 2782 page_found->lgrp_id = -1; 2783 } 2784 if ((validity[i] & 4) != 0) { 2785 page_found->size = outdata[types * i + 1]; 2786 } else { 2787 page_found->size = 0; 2788 } 2789 return (char*)addrs[i]; 2790 } 2791 2792 p = addrs[addrs_count - 1] + page_size; 2793 } 2794 return end; 2795} 2796 2797bool os::pd_uncommit_memory(char* addr, size_t bytes) { 2798 size_t size = bytes; 2799 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2800 // uncommitted page. Otherwise, the read/write might succeed if we 2801 // have enough swap space to back the physical page. 2802 return 2803 NULL != Solaris::mmap_chunk(addr, size, 2804 MAP_PRIVATE|MAP_FIXED|MAP_NORESERVE, 2805 PROT_NONE); 2806} 2807 2808char* os::Solaris::mmap_chunk(char *addr, size_t size, int flags, int prot) { 2809 char *b = (char *)mmap(addr, size, prot, flags, os::Solaris::_dev_zero_fd, 0); 2810 2811 if (b == MAP_FAILED) { 2812 return NULL; 2813 } 2814 return b; 2815} 2816 2817char* os::Solaris::anon_mmap(char* requested_addr, size_t bytes, 2818 size_t alignment_hint, bool fixed) { 2819 char* addr = requested_addr; 2820 int flags = MAP_PRIVATE | MAP_NORESERVE; 2821 2822 assert(!(fixed && (alignment_hint > 0)), 2823 "alignment hint meaningless with fixed mmap"); 2824 2825 if (fixed) { 2826 flags |= MAP_FIXED; 2827 } else if (has_map_align && (alignment_hint > (size_t) vm_page_size())) { 2828 flags |= MAP_ALIGN; 2829 addr = (char*) alignment_hint; 2830 } 2831 2832 // Map uncommitted pages PROT_NONE so we fail early if we touch an 2833 // uncommitted page. Otherwise, the read/write might succeed if we 2834 // have enough swap space to back the physical page. 2835 return mmap_chunk(addr, bytes, flags, PROT_NONE); 2836} 2837 2838char* os::pd_reserve_memory(size_t bytes, char* requested_addr, 2839 size_t alignment_hint) { 2840 char* addr = Solaris::anon_mmap(requested_addr, bytes, alignment_hint, 2841 (requested_addr != NULL)); 2842 2843 guarantee(requested_addr == NULL || requested_addr == addr, 2844 "OS failed to return requested mmap address."); 2845 return addr; 2846} 2847 2848// Reserve memory at an arbitrary address, only if that area is 2849// available (and not reserved for something else). 2850 2851char* os::pd_attempt_reserve_memory_at(size_t bytes, char* requested_addr) { 2852 const int max_tries = 10; 2853 char* base[max_tries]; 2854 size_t size[max_tries]; 2855 2856 // Solaris adds a gap between mmap'ed regions. The size of the gap 2857 // is dependent on the requested size and the MMU. Our initial gap 2858 // value here is just a guess and will be corrected later. 2859 bool had_top_overlap = false; 2860 bool have_adjusted_gap = false; 2861 size_t gap = 0x400000; 2862 2863 // Assert only that the size is a multiple of the page size, since 2864 // that's all that mmap requires, and since that's all we really know 2865 // about at this low abstraction level. If we need higher alignment, 2866 // we can either pass an alignment to this method or verify alignment 2867 // in one of the methods further up the call chain. See bug 5044738. 2868 assert(bytes % os::vm_page_size() == 0, "reserving unexpected size block"); 2869 2870 // Since snv_84, Solaris attempts to honor the address hint - see 5003415. 2871 // Give it a try, if the kernel honors the hint we can return immediately. 2872 char* addr = Solaris::anon_mmap(requested_addr, bytes, 0, false); 2873 2874 volatile int err = errno; 2875 if (addr == requested_addr) { 2876 return addr; 2877 } else if (addr != NULL) { 2878 pd_unmap_memory(addr, bytes); 2879 } 2880 2881 if (PrintMiscellaneous && Verbose) { 2882 char buf[256]; 2883 buf[0] = '\0'; 2884 if (addr == NULL) { 2885 jio_snprintf(buf, sizeof(buf), ": %s", strerror(err)); 2886 } 2887 warning("attempt_reserve_memory_at: couldn't reserve " SIZE_FORMAT " bytes at " 2888 PTR_FORMAT ": reserve_memory_helper returned " PTR_FORMAT 2889 "%s", bytes, requested_addr, addr, buf); 2890 } 2891 2892 // Address hint method didn't work. Fall back to the old method. 2893 // In theory, once SNV becomes our oldest supported platform, this 2894 // code will no longer be needed. 2895 // 2896 // Repeatedly allocate blocks until the block is allocated at the 2897 // right spot. Give up after max_tries. 2898 int i; 2899 for (i = 0; i < max_tries; ++i) { 2900 base[i] = reserve_memory(bytes); 2901 2902 if (base[i] != NULL) { 2903 // Is this the block we wanted? 2904 if (base[i] == requested_addr) { 2905 size[i] = bytes; 2906 break; 2907 } 2908 2909 // check that the gap value is right 2910 if (had_top_overlap && !have_adjusted_gap) { 2911 size_t actual_gap = base[i-1] - base[i] - bytes; 2912 if (gap != actual_gap) { 2913 // adjust the gap value and retry the last 2 allocations 2914 assert(i > 0, "gap adjustment code problem"); 2915 have_adjusted_gap = true; // adjust the gap only once, just in case 2916 gap = actual_gap; 2917 if (PrintMiscellaneous && Verbose) { 2918 warning("attempt_reserve_memory_at: adjusted gap to 0x%lx", gap); 2919 } 2920 unmap_memory(base[i], bytes); 2921 unmap_memory(base[i-1], size[i-1]); 2922 i-=2; 2923 continue; 2924 } 2925 } 2926 2927 // Does this overlap the block we wanted? Give back the overlapped 2928 // parts and try again. 2929 // 2930 // There is still a bug in this code: if top_overlap == bytes, 2931 // the overlap is offset from requested region by the value of gap. 2932 // In this case giving back the overlapped part will not work, 2933 // because we'll give back the entire block at base[i] and 2934 // therefore the subsequent allocation will not generate a new gap. 2935 // This could be fixed with a new algorithm that used larger 2936 // or variable size chunks to find the requested region - 2937 // but such a change would introduce additional complications. 2938 // It's rare enough that the planets align for this bug, 2939 // so we'll just wait for a fix for 6204603/5003415 which 2940 // will provide a mmap flag to allow us to avoid this business. 2941 2942 size_t top_overlap = requested_addr + (bytes + gap) - base[i]; 2943 if (top_overlap >= 0 && top_overlap < bytes) { 2944 had_top_overlap = true; 2945 unmap_memory(base[i], top_overlap); 2946 base[i] += top_overlap; 2947 size[i] = bytes - top_overlap; 2948 } else { 2949 size_t bottom_overlap = base[i] + bytes - requested_addr; 2950 if (bottom_overlap >= 0 && bottom_overlap < bytes) { 2951 if (PrintMiscellaneous && Verbose && bottom_overlap == 0) { 2952 warning("attempt_reserve_memory_at: possible alignment bug"); 2953 } 2954 unmap_memory(requested_addr, bottom_overlap); 2955 size[i] = bytes - bottom_overlap; 2956 } else { 2957 size[i] = bytes; 2958 } 2959 } 2960 } 2961 } 2962 2963 // Give back the unused reserved pieces. 2964 2965 for (int j = 0; j < i; ++j) { 2966 if (base[j] != NULL) { 2967 unmap_memory(base[j], size[j]); 2968 } 2969 } 2970 2971 return (i < max_tries) ? requested_addr : NULL; 2972} 2973 2974bool os::pd_release_memory(char* addr, size_t bytes) { 2975 size_t size = bytes; 2976 return munmap(addr, size) == 0; 2977} 2978 2979static bool solaris_mprotect(char* addr, size_t bytes, int prot) { 2980 assert(addr == (char*)align_size_down((uintptr_t)addr, os::vm_page_size()), 2981 "addr must be page aligned"); 2982 int retVal = mprotect(addr, bytes, prot); 2983 return retVal == 0; 2984} 2985 2986// Protect memory (Used to pass readonly pages through 2987// JNI GetArray<type>Elements with empty arrays.) 2988// Also, used for serialization page and for compressed oops null pointer 2989// checking. 2990bool os::protect_memory(char* addr, size_t bytes, ProtType prot, 2991 bool is_committed) { 2992 unsigned int p = 0; 2993 switch (prot) { 2994 case MEM_PROT_NONE: p = PROT_NONE; break; 2995 case MEM_PROT_READ: p = PROT_READ; break; 2996 case MEM_PROT_RW: p = PROT_READ|PROT_WRITE; break; 2997 case MEM_PROT_RWX: p = PROT_READ|PROT_WRITE|PROT_EXEC; break; 2998 default: 2999 ShouldNotReachHere(); 3000 } 3001 // is_committed is unused. 3002 return solaris_mprotect(addr, bytes, p); 3003} 3004 3005// guard_memory and unguard_memory only happens within stack guard pages. 3006// Since ISM pertains only to the heap, guard and unguard memory should not 3007/// happen with an ISM region. 3008bool os::guard_memory(char* addr, size_t bytes) { 3009 return solaris_mprotect(addr, bytes, PROT_NONE); 3010} 3011 3012bool os::unguard_memory(char* addr, size_t bytes) { 3013 return solaris_mprotect(addr, bytes, PROT_READ|PROT_WRITE); 3014} 3015 3016// Large page support 3017static size_t _large_page_size = 0; 3018 3019// Insertion sort for small arrays (descending order). 3020static void insertion_sort_descending(size_t* array, int len) { 3021 for (int i = 0; i < len; i++) { 3022 size_t val = array[i]; 3023 for (size_t key = i; key > 0 && array[key - 1] < val; --key) { 3024 size_t tmp = array[key]; 3025 array[key] = array[key - 1]; 3026 array[key - 1] = tmp; 3027 } 3028 } 3029} 3030 3031bool os::Solaris::mpss_sanity_check(bool warn, size_t* page_size) { 3032 const unsigned int usable_count = VM_Version::page_size_count(); 3033 if (usable_count == 1) { 3034 return false; 3035 } 3036 3037 // Find the right getpagesizes interface. When solaris 11 is the minimum 3038 // build platform, getpagesizes() (without the '2') can be called directly. 3039 typedef int (*gps_t)(size_t[], int); 3040 gps_t gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes2")); 3041 if (gps_func == NULL) { 3042 gps_func = CAST_TO_FN_PTR(gps_t, dlsym(RTLD_DEFAULT, "getpagesizes")); 3043 if (gps_func == NULL) { 3044 if (warn) { 3045 warning("MPSS is not supported by the operating system."); 3046 } 3047 return false; 3048 } 3049 } 3050 3051 // Fill the array of page sizes. 3052 int n = (*gps_func)(_page_sizes, page_sizes_max); 3053 assert(n > 0, "Solaris bug?"); 3054 3055 if (n == page_sizes_max) { 3056 // Add a sentinel value (necessary only if the array was completely filled 3057 // since it is static (zeroed at initialization)). 3058 _page_sizes[--n] = 0; 3059 DEBUG_ONLY(warning("increase the size of the os::_page_sizes array.");) 3060 } 3061 assert(_page_sizes[n] == 0, "missing sentinel"); 3062 trace_page_sizes("available page sizes", _page_sizes, n); 3063 3064 if (n == 1) return false; // Only one page size available. 3065 3066 // Skip sizes larger than 4M (or LargePageSizeInBytes if it was set) and 3067 // select up to usable_count elements. First sort the array, find the first 3068 // acceptable value, then copy the usable sizes to the top of the array and 3069 // trim the rest. Make sure to include the default page size :-). 3070 // 3071 // A better policy could get rid of the 4M limit by taking the sizes of the 3072 // important VM memory regions (java heap and possibly the code cache) into 3073 // account. 3074 insertion_sort_descending(_page_sizes, n); 3075 const size_t size_limit = 3076 FLAG_IS_DEFAULT(LargePageSizeInBytes) ? 4 * M : LargePageSizeInBytes; 3077 int beg; 3078 for (beg = 0; beg < n && _page_sizes[beg] > size_limit; ++beg) /* empty */; 3079 const int end = MIN2((int)usable_count, n) - 1; 3080 for (int cur = 0; cur < end; ++cur, ++beg) { 3081 _page_sizes[cur] = _page_sizes[beg]; 3082 } 3083 _page_sizes[end] = vm_page_size(); 3084 _page_sizes[end + 1] = 0; 3085 3086 if (_page_sizes[end] > _page_sizes[end - 1]) { 3087 // Default page size is not the smallest; sort again. 3088 insertion_sort_descending(_page_sizes, end + 1); 3089 } 3090 *page_size = _page_sizes[0]; 3091 3092 trace_page_sizes("usable page sizes", _page_sizes, end + 1); 3093 return true; 3094} 3095 3096void os::large_page_init() { 3097 if (UseLargePages) { 3098 // print a warning if any large page related flag is specified on command line 3099 bool warn_on_failure = !FLAG_IS_DEFAULT(UseLargePages) || 3100 !FLAG_IS_DEFAULT(LargePageSizeInBytes); 3101 3102 UseLargePages = Solaris::mpss_sanity_check(warn_on_failure, &_large_page_size); 3103 } 3104} 3105 3106bool os::Solaris::is_valid_page_size(size_t bytes) { 3107 for (int i = 0; _page_sizes[i] != 0; i++) { 3108 if (_page_sizes[i] == bytes) { 3109 return true; 3110 } 3111 } 3112 return false; 3113} 3114 3115bool os::Solaris::setup_large_pages(caddr_t start, size_t bytes, size_t align) { 3116 assert(is_valid_page_size(align), err_msg(SIZE_FORMAT " is not a valid page size", align)); 3117 assert(is_ptr_aligned((void*) start, align), 3118 err_msg(PTR_FORMAT " is not aligned to " SIZE_FORMAT, p2i((void*) start), align)); 3119 assert(is_size_aligned(bytes, align), 3120 err_msg(SIZE_FORMAT " is not aligned to " SIZE_FORMAT, bytes, align)); 3121 3122 // Signal to OS that we want large pages for addresses 3123 // from addr, addr + bytes 3124 struct memcntl_mha mpss_struct; 3125 mpss_struct.mha_cmd = MHA_MAPSIZE_VA; 3126 mpss_struct.mha_pagesize = align; 3127 mpss_struct.mha_flags = 0; 3128 // Upon successful completion, memcntl() returns 0 3129 if (memcntl(start, bytes, MC_HAT_ADVISE, (caddr_t) &mpss_struct, 0, 0)) { 3130 debug_only(warning("Attempt to use MPSS failed.")); 3131 return false; 3132 } 3133 return true; 3134} 3135 3136char* os::reserve_memory_special(size_t size, size_t alignment, char* addr, bool exec) { 3137 fatal("os::reserve_memory_special should not be called on Solaris."); 3138 return NULL; 3139} 3140 3141bool os::release_memory_special(char* base, size_t bytes) { 3142 fatal("os::release_memory_special should not be called on Solaris."); 3143 return false; 3144} 3145 3146size_t os::large_page_size() { 3147 return _large_page_size; 3148} 3149 3150// MPSS allows application to commit large page memory on demand; with ISM 3151// the entire memory region must be allocated as shared memory. 3152bool os::can_commit_large_page_memory() { 3153 return true; 3154} 3155 3156bool os::can_execute_large_page_memory() { 3157 return true; 3158} 3159 3160// Read calls from inside the vm need to perform state transitions 3161size_t os::read(int fd, void *buf, unsigned int nBytes) { 3162 size_t res; 3163 JavaThread* thread = (JavaThread*)Thread::current(); 3164 assert(thread->thread_state() == _thread_in_vm, "Assumed _thread_in_vm"); 3165 ThreadBlockInVM tbiv(thread); 3166 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3167 return res; 3168} 3169 3170size_t os::restartable_read(int fd, void *buf, unsigned int nBytes) { 3171 size_t res; 3172 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 3173 "Assumed _thread_in_native"); 3174 RESTARTABLE(::read(fd, buf, (size_t) nBytes), res); 3175 return res; 3176} 3177 3178void os::naked_short_sleep(jlong ms) { 3179 assert(ms < 1000, "Un-interruptable sleep, short time use only"); 3180 3181 // usleep is deprecated and removed from POSIX, in favour of nanosleep, but 3182 // Solaris requires -lrt for this. 3183 usleep((ms * 1000)); 3184 3185 return; 3186} 3187 3188// Sleep forever; naked call to OS-specific sleep; use with CAUTION 3189void os::infinite_sleep() { 3190 while (true) { // sleep forever ... 3191 ::sleep(100); // ... 100 seconds at a time 3192 } 3193} 3194 3195// Used to convert frequent JVM_Yield() to nops 3196bool os::dont_yield() { 3197 if (DontYieldALot) { 3198 static hrtime_t last_time = 0; 3199 hrtime_t diff = getTimeNanos() - last_time; 3200 3201 if (diff < DontYieldALotInterval * 1000000) { 3202 return true; 3203 } 3204 3205 last_time += diff; 3206 3207 return false; 3208 } else { 3209 return false; 3210 } 3211} 3212 3213// Note that yield semantics are defined by the scheduling class to which 3214// the thread currently belongs. Typically, yield will _not yield to 3215// other equal or higher priority threads that reside on the dispatch queues 3216// of other CPUs. 3217 3218void os::naked_yield() { 3219 thr_yield(); 3220} 3221 3222// Interface for setting lwp priorities. If we are using T2 libthread, 3223// which forces the use of BoundThreads or we manually set UseBoundThreads, 3224// all of our threads will be assigned to real lwp's. Using the thr_setprio 3225// function is meaningless in this mode so we must adjust the real lwp's priority 3226// The routines below implement the getting and setting of lwp priorities. 3227// 3228// Note: T2 is now the only supported libthread. UseBoundThreads flag is 3229// being deprecated and all threads are now BoundThreads 3230// 3231// Note: There are three priority scales used on Solaris. Java priotities 3232// which range from 1 to 10, libthread "thr_setprio" scale which range 3233// from 0 to 127, and the current scheduling class of the process we 3234// are running in. This is typically from -60 to +60. 3235// The setting of the lwp priorities in done after a call to thr_setprio 3236// so Java priorities are mapped to libthread priorities and we map from 3237// the latter to lwp priorities. We don't keep priorities stored in 3238// Java priorities since some of our worker threads want to set priorities 3239// higher than all Java threads. 3240// 3241// For related information: 3242// (1) man -s 2 priocntl 3243// (2) man -s 4 priocntl 3244// (3) man dispadmin 3245// = librt.so 3246// = libthread/common/rtsched.c - thrp_setlwpprio(). 3247// = ps -cL <pid> ... to validate priority. 3248// = sched_get_priority_min and _max 3249// pthread_create 3250// sched_setparam 3251// pthread_setschedparam 3252// 3253// Assumptions: 3254// + We assume that all threads in the process belong to the same 3255// scheduling class. IE. an homogenous process. 3256// + Must be root or in IA group to change change "interactive" attribute. 3257// Priocntl() will fail silently. The only indication of failure is when 3258// we read-back the value and notice that it hasn't changed. 3259// + Interactive threads enter the runq at the head, non-interactive at the tail. 3260// + For RT, change timeslice as well. Invariant: 3261// constant "priority integral" 3262// Konst == TimeSlice * (60-Priority) 3263// Given a priority, compute appropriate timeslice. 3264// + Higher numerical values have higher priority. 3265 3266// sched class attributes 3267typedef struct { 3268 int schedPolicy; // classID 3269 int maxPrio; 3270 int minPrio; 3271} SchedInfo; 3272 3273 3274static SchedInfo tsLimits, iaLimits, rtLimits, fxLimits; 3275 3276#ifdef ASSERT 3277static int ReadBackValidate = 1; 3278#endif 3279static int myClass = 0; 3280static int myMin = 0; 3281static int myMax = 0; 3282static int myCur = 0; 3283static bool priocntl_enable = false; 3284 3285static const int criticalPrio = 60; // FX/60 is critical thread class/priority on T4 3286static int java_MaxPriority_to_os_priority = 0; // Saved mapping 3287 3288 3289// lwp_priocntl_init 3290// 3291// Try to determine the priority scale for our process. 3292// 3293// Return errno or 0 if OK. 3294// 3295static int lwp_priocntl_init() { 3296 int rslt; 3297 pcinfo_t ClassInfo; 3298 pcparms_t ParmInfo; 3299 int i; 3300 3301 if (!UseThreadPriorities) return 0; 3302 3303 // If ThreadPriorityPolicy is 1, switch tables 3304 if (ThreadPriorityPolicy == 1) { 3305 for (i = 0; i < CriticalPriority+1; i++) 3306 os::java_to_os_priority[i] = prio_policy1[i]; 3307 } 3308 if (UseCriticalJavaThreadPriority) { 3309 // MaxPriority always maps to the FX scheduling class and criticalPrio. 3310 // See set_native_priority() and set_lwp_class_and_priority(). 3311 // Save original MaxPriority mapping in case attempt to 3312 // use critical priority fails. 3313 java_MaxPriority_to_os_priority = os::java_to_os_priority[MaxPriority]; 3314 // Set negative to distinguish from other priorities 3315 os::java_to_os_priority[MaxPriority] = -criticalPrio; 3316 } 3317 3318 // Get IDs for a set of well-known scheduling classes. 3319 // TODO-FIXME: GETCLINFO returns the current # of classes in the 3320 // the system. We should have a loop that iterates over the 3321 // classID values, which are known to be "small" integers. 3322 3323 strcpy(ClassInfo.pc_clname, "TS"); 3324 ClassInfo.pc_cid = -1; 3325 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3326 if (rslt < 0) return errno; 3327 assert(ClassInfo.pc_cid != -1, "cid for TS class is -1"); 3328 tsLimits.schedPolicy = ClassInfo.pc_cid; 3329 tsLimits.maxPrio = ((tsinfo_t*)ClassInfo.pc_clinfo)->ts_maxupri; 3330 tsLimits.minPrio = -tsLimits.maxPrio; 3331 3332 strcpy(ClassInfo.pc_clname, "IA"); 3333 ClassInfo.pc_cid = -1; 3334 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3335 if (rslt < 0) return errno; 3336 assert(ClassInfo.pc_cid != -1, "cid for IA class is -1"); 3337 iaLimits.schedPolicy = ClassInfo.pc_cid; 3338 iaLimits.maxPrio = ((iainfo_t*)ClassInfo.pc_clinfo)->ia_maxupri; 3339 iaLimits.minPrio = -iaLimits.maxPrio; 3340 3341 strcpy(ClassInfo.pc_clname, "RT"); 3342 ClassInfo.pc_cid = -1; 3343 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3344 if (rslt < 0) return errno; 3345 assert(ClassInfo.pc_cid != -1, "cid for RT class is -1"); 3346 rtLimits.schedPolicy = ClassInfo.pc_cid; 3347 rtLimits.maxPrio = ((rtinfo_t*)ClassInfo.pc_clinfo)->rt_maxpri; 3348 rtLimits.minPrio = 0; 3349 3350 strcpy(ClassInfo.pc_clname, "FX"); 3351 ClassInfo.pc_cid = -1; 3352 rslt = priocntl(P_ALL, 0, PC_GETCID, (caddr_t)&ClassInfo); 3353 if (rslt < 0) return errno; 3354 assert(ClassInfo.pc_cid != -1, "cid for FX class is -1"); 3355 fxLimits.schedPolicy = ClassInfo.pc_cid; 3356 fxLimits.maxPrio = ((fxinfo_t*)ClassInfo.pc_clinfo)->fx_maxupri; 3357 fxLimits.minPrio = 0; 3358 3359 // Query our "current" scheduling class. 3360 // This will normally be IA, TS or, rarely, FX or RT. 3361 memset(&ParmInfo, 0, sizeof(ParmInfo)); 3362 ParmInfo.pc_cid = PC_CLNULL; 3363 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3364 if (rslt < 0) return errno; 3365 myClass = ParmInfo.pc_cid; 3366 3367 // We now know our scheduling classId, get specific information 3368 // about the class. 3369 ClassInfo.pc_cid = myClass; 3370 ClassInfo.pc_clname[0] = 0; 3371 rslt = priocntl((idtype)0, 0, PC_GETCLINFO, (caddr_t)&ClassInfo); 3372 if (rslt < 0) return errno; 3373 3374 if (ThreadPriorityVerbose) { 3375 tty->print_cr("lwp_priocntl_init: Class=%d(%s)...", myClass, ClassInfo.pc_clname); 3376 } 3377 3378 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3379 ParmInfo.pc_cid = PC_CLNULL; 3380 rslt = priocntl(P_PID, P_MYID, PC_GETPARMS, (caddr_t)&ParmInfo); 3381 if (rslt < 0) return errno; 3382 3383 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3384 myMin = rtLimits.minPrio; 3385 myMax = rtLimits.maxPrio; 3386 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3387 iaparms_t *iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3388 myMin = iaLimits.minPrio; 3389 myMax = iaLimits.maxPrio; 3390 myMax = MIN2(myMax, (int)iaInfo->ia_uprilim); // clamp - restrict 3391 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3392 tsparms_t *tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3393 myMin = tsLimits.minPrio; 3394 myMax = tsLimits.maxPrio; 3395 myMax = MIN2(myMax, (int)tsInfo->ts_uprilim); // clamp - restrict 3396 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3397 fxparms_t *fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3398 myMin = fxLimits.minPrio; 3399 myMax = fxLimits.maxPrio; 3400 myMax = MIN2(myMax, (int)fxInfo->fx_uprilim); // clamp - restrict 3401 } else { 3402 // No clue - punt 3403 if (ThreadPriorityVerbose) { 3404 tty->print_cr("Unknown scheduling class: %s ... \n", 3405 ClassInfo.pc_clname); 3406 } 3407 return EINVAL; // no clue, punt 3408 } 3409 3410 if (ThreadPriorityVerbose) { 3411 tty->print_cr("Thread priority Range: [%d..%d]\n", myMin, myMax); 3412 } 3413 3414 priocntl_enable = true; // Enable changing priorities 3415 return 0; 3416} 3417 3418#define IAPRI(x) ((iaparms_t *)((x).pc_clparms)) 3419#define RTPRI(x) ((rtparms_t *)((x).pc_clparms)) 3420#define TSPRI(x) ((tsparms_t *)((x).pc_clparms)) 3421#define FXPRI(x) ((fxparms_t *)((x).pc_clparms)) 3422 3423 3424// scale_to_lwp_priority 3425// 3426// Convert from the libthread "thr_setprio" scale to our current 3427// lwp scheduling class scale. 3428// 3429static int scale_to_lwp_priority(int rMin, int rMax, int x) { 3430 int v; 3431 3432 if (x == 127) return rMax; // avoid round-down 3433 v = (((x*(rMax-rMin)))/128)+rMin; 3434 return v; 3435} 3436 3437 3438// set_lwp_class_and_priority 3439int set_lwp_class_and_priority(int ThreadID, int lwpid, 3440 int newPrio, int new_class, bool scale) { 3441 int rslt; 3442 int Actual, Expected, prv; 3443 pcparms_t ParmInfo; // for GET-SET 3444#ifdef ASSERT 3445 pcparms_t ReadBack; // for readback 3446#endif 3447 3448 // Set priority via PC_GETPARMS, update, PC_SETPARMS 3449 // Query current values. 3450 // TODO: accelerate this by eliminating the PC_GETPARMS call. 3451 // Cache "pcparms_t" in global ParmCache. 3452 // TODO: elide set-to-same-value 3453 3454 // If something went wrong on init, don't change priorities. 3455 if (!priocntl_enable) { 3456 if (ThreadPriorityVerbose) { 3457 tty->print_cr("Trying to set priority but init failed, ignoring"); 3458 } 3459 return EINVAL; 3460 } 3461 3462 // If lwp hasn't started yet, just return 3463 // the _start routine will call us again. 3464 if (lwpid <= 0) { 3465 if (ThreadPriorityVerbose) { 3466 tty->print_cr("deferring the set_lwp_class_and_priority of thread " 3467 INTPTR_FORMAT " to %d, lwpid not set", 3468 ThreadID, newPrio); 3469 } 3470 return 0; 3471 } 3472 3473 if (ThreadPriorityVerbose) { 3474 tty->print_cr ("set_lwp_class_and_priority(" 3475 INTPTR_FORMAT "@" INTPTR_FORMAT " %d) ", 3476 ThreadID, lwpid, newPrio); 3477 } 3478 3479 memset(&ParmInfo, 0, sizeof(pcparms_t)); 3480 ParmInfo.pc_cid = PC_CLNULL; 3481 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ParmInfo); 3482 if (rslt < 0) return errno; 3483 3484 int cur_class = ParmInfo.pc_cid; 3485 ParmInfo.pc_cid = (id_t)new_class; 3486 3487 if (new_class == rtLimits.schedPolicy) { 3488 rtparms_t *rtInfo = (rtparms_t*)ParmInfo.pc_clparms; 3489 rtInfo->rt_pri = scale ? scale_to_lwp_priority(rtLimits.minPrio, 3490 rtLimits.maxPrio, newPrio) 3491 : newPrio; 3492 rtInfo->rt_tqsecs = RT_NOCHANGE; 3493 rtInfo->rt_tqnsecs = RT_NOCHANGE; 3494 if (ThreadPriorityVerbose) { 3495 tty->print_cr("RT: %d->%d\n", newPrio, rtInfo->rt_pri); 3496 } 3497 } else if (new_class == iaLimits.schedPolicy) { 3498 iaparms_t* iaInfo = (iaparms_t*)ParmInfo.pc_clparms; 3499 int maxClamped = MIN2(iaLimits.maxPrio, 3500 cur_class == new_class 3501 ? (int)iaInfo->ia_uprilim : iaLimits.maxPrio); 3502 iaInfo->ia_upri = scale ? scale_to_lwp_priority(iaLimits.minPrio, 3503 maxClamped, newPrio) 3504 : newPrio; 3505 iaInfo->ia_uprilim = cur_class == new_class 3506 ? IA_NOCHANGE : (pri_t)iaLimits.maxPrio; 3507 iaInfo->ia_mode = IA_NOCHANGE; 3508 if (ThreadPriorityVerbose) { 3509 tty->print_cr("IA: [%d...%d] %d->%d\n", 3510 iaLimits.minPrio, maxClamped, newPrio, iaInfo->ia_upri); 3511 } 3512 } else if (new_class == tsLimits.schedPolicy) { 3513 tsparms_t* tsInfo = (tsparms_t*)ParmInfo.pc_clparms; 3514 int maxClamped = MIN2(tsLimits.maxPrio, 3515 cur_class == new_class 3516 ? (int)tsInfo->ts_uprilim : tsLimits.maxPrio); 3517 tsInfo->ts_upri = scale ? scale_to_lwp_priority(tsLimits.minPrio, 3518 maxClamped, newPrio) 3519 : newPrio; 3520 tsInfo->ts_uprilim = cur_class == new_class 3521 ? TS_NOCHANGE : (pri_t)tsLimits.maxPrio; 3522 if (ThreadPriorityVerbose) { 3523 tty->print_cr("TS: [%d...%d] %d->%d\n", 3524 tsLimits.minPrio, maxClamped, newPrio, tsInfo->ts_upri); 3525 } 3526 } else if (new_class == fxLimits.schedPolicy) { 3527 fxparms_t* fxInfo = (fxparms_t*)ParmInfo.pc_clparms; 3528 int maxClamped = MIN2(fxLimits.maxPrio, 3529 cur_class == new_class 3530 ? (int)fxInfo->fx_uprilim : fxLimits.maxPrio); 3531 fxInfo->fx_upri = scale ? scale_to_lwp_priority(fxLimits.minPrio, 3532 maxClamped, newPrio) 3533 : newPrio; 3534 fxInfo->fx_uprilim = cur_class == new_class 3535 ? FX_NOCHANGE : (pri_t)fxLimits.maxPrio; 3536 fxInfo->fx_tqsecs = FX_NOCHANGE; 3537 fxInfo->fx_tqnsecs = FX_NOCHANGE; 3538 if (ThreadPriorityVerbose) { 3539 tty->print_cr("FX: [%d...%d] %d->%d\n", 3540 fxLimits.minPrio, maxClamped, newPrio, fxInfo->fx_upri); 3541 } 3542 } else { 3543 if (ThreadPriorityVerbose) { 3544 tty->print_cr("Unknown new scheduling class %d\n", new_class); 3545 } 3546 return EINVAL; // no clue, punt 3547 } 3548 3549 rslt = priocntl(P_LWPID, lwpid, PC_SETPARMS, (caddr_t)&ParmInfo); 3550 if (ThreadPriorityVerbose && rslt) { 3551 tty->print_cr ("PC_SETPARMS ->%d %d\n", rslt, errno); 3552 } 3553 if (rslt < 0) return errno; 3554 3555#ifdef ASSERT 3556 // Sanity check: read back what we just attempted to set. 3557 // In theory it could have changed in the interim ... 3558 // 3559 // The priocntl system call is tricky. 3560 // Sometimes it'll validate the priority value argument and 3561 // return EINVAL if unhappy. At other times it fails silently. 3562 // Readbacks are prudent. 3563 3564 if (!ReadBackValidate) return 0; 3565 3566 memset(&ReadBack, 0, sizeof(pcparms_t)); 3567 ReadBack.pc_cid = PC_CLNULL; 3568 rslt = priocntl(P_LWPID, lwpid, PC_GETPARMS, (caddr_t)&ReadBack); 3569 assert(rslt >= 0, "priocntl failed"); 3570 Actual = Expected = 0xBAD; 3571 assert(ParmInfo.pc_cid == ReadBack.pc_cid, "cid's don't match"); 3572 if (ParmInfo.pc_cid == rtLimits.schedPolicy) { 3573 Actual = RTPRI(ReadBack)->rt_pri; 3574 Expected = RTPRI(ParmInfo)->rt_pri; 3575 } else if (ParmInfo.pc_cid == iaLimits.schedPolicy) { 3576 Actual = IAPRI(ReadBack)->ia_upri; 3577 Expected = IAPRI(ParmInfo)->ia_upri; 3578 } else if (ParmInfo.pc_cid == tsLimits.schedPolicy) { 3579 Actual = TSPRI(ReadBack)->ts_upri; 3580 Expected = TSPRI(ParmInfo)->ts_upri; 3581 } else if (ParmInfo.pc_cid == fxLimits.schedPolicy) { 3582 Actual = FXPRI(ReadBack)->fx_upri; 3583 Expected = FXPRI(ParmInfo)->fx_upri; 3584 } else { 3585 if (ThreadPriorityVerbose) { 3586 tty->print_cr("set_lwp_class_and_priority: unexpected class in readback: %d\n", 3587 ParmInfo.pc_cid); 3588 } 3589 } 3590 3591 if (Actual != Expected) { 3592 if (ThreadPriorityVerbose) { 3593 tty->print_cr ("set_lwp_class_and_priority(%d %d) Class=%d: actual=%d vs expected=%d\n", 3594 lwpid, newPrio, ReadBack.pc_cid, Actual, Expected); 3595 } 3596 } 3597#endif 3598 3599 return 0; 3600} 3601 3602// Solaris only gives access to 128 real priorities at a time, 3603// so we expand Java's ten to fill this range. This would be better 3604// if we dynamically adjusted relative priorities. 3605// 3606// The ThreadPriorityPolicy option allows us to select 2 different 3607// priority scales. 3608// 3609// ThreadPriorityPolicy=0 3610// Since the Solaris' default priority is MaximumPriority, we do not 3611// set a priority lower than Max unless a priority lower than 3612// NormPriority is requested. 3613// 3614// ThreadPriorityPolicy=1 3615// This mode causes the priority table to get filled with 3616// linear values. NormPriority get's mapped to 50% of the 3617// Maximum priority an so on. This will cause VM threads 3618// to get unfair treatment against other Solaris processes 3619// which do not explicitly alter their thread priorities. 3620 3621int os::java_to_os_priority[CriticalPriority + 1] = { 3622 -99999, // 0 Entry should never be used 3623 3624 0, // 1 MinPriority 3625 32, // 2 3626 64, // 3 3627 3628 96, // 4 3629 127, // 5 NormPriority 3630 127, // 6 3631 3632 127, // 7 3633 127, // 8 3634 127, // 9 NearMaxPriority 3635 3636 127, // 10 MaxPriority 3637 3638 -criticalPrio // 11 CriticalPriority 3639}; 3640 3641OSReturn os::set_native_priority(Thread* thread, int newpri) { 3642 OSThread* osthread = thread->osthread(); 3643 3644 // Save requested priority in case the thread hasn't been started 3645 osthread->set_native_priority(newpri); 3646 3647 // Check for critical priority request 3648 bool fxcritical = false; 3649 if (newpri == -criticalPrio) { 3650 fxcritical = true; 3651 newpri = criticalPrio; 3652 } 3653 3654 assert(newpri >= MinimumPriority && newpri <= MaximumPriority, "bad priority mapping"); 3655 if (!UseThreadPriorities) return OS_OK; 3656 3657 int status = 0; 3658 3659 if (!fxcritical) { 3660 // Use thr_setprio only if we have a priority that thr_setprio understands 3661 status = thr_setprio(thread->osthread()->thread_id(), newpri); 3662 } 3663 3664 int lwp_status = 3665 set_lwp_class_and_priority(osthread->thread_id(), 3666 osthread->lwp_id(), 3667 newpri, 3668 fxcritical ? fxLimits.schedPolicy : myClass, 3669 !fxcritical); 3670 if (lwp_status != 0 && fxcritical) { 3671 // Try again, this time without changing the scheduling class 3672 newpri = java_MaxPriority_to_os_priority; 3673 lwp_status = set_lwp_class_and_priority(osthread->thread_id(), 3674 osthread->lwp_id(), 3675 newpri, myClass, false); 3676 } 3677 status |= lwp_status; 3678 return (status == 0) ? OS_OK : OS_ERR; 3679} 3680 3681 3682OSReturn os::get_native_priority(const Thread* const thread, 3683 int *priority_ptr) { 3684 int p; 3685 if (!UseThreadPriorities) { 3686 *priority_ptr = NormalPriority; 3687 return OS_OK; 3688 } 3689 int status = thr_getprio(thread->osthread()->thread_id(), &p); 3690 if (status != 0) { 3691 return OS_ERR; 3692 } 3693 *priority_ptr = p; 3694 return OS_OK; 3695} 3696 3697 3698// Hint to the underlying OS that a task switch would not be good. 3699// Void return because it's a hint and can fail. 3700void os::hint_no_preempt() { 3701 schedctl_start(schedctl_init()); 3702} 3703 3704static void resume_clear_context(OSThread *osthread) { 3705 osthread->set_ucontext(NULL); 3706} 3707 3708static void suspend_save_context(OSThread *osthread, ucontext_t* context) { 3709 osthread->set_ucontext(context); 3710} 3711 3712static Semaphore sr_semaphore; 3713 3714void os::Solaris::SR_handler(Thread* thread, ucontext_t* uc) { 3715 // Save and restore errno to avoid confusing native code with EINTR 3716 // after sigsuspend. 3717 int old_errno = errno; 3718 3719 OSThread* osthread = thread->osthread(); 3720 assert(thread->is_VM_thread() || thread->is_Java_thread(), "Must be VMThread or JavaThread"); 3721 3722 os::SuspendResume::State current = osthread->sr.state(); 3723 if (current == os::SuspendResume::SR_SUSPEND_REQUEST) { 3724 suspend_save_context(osthread, uc); 3725 3726 // attempt to switch the state, we assume we had a SUSPEND_REQUEST 3727 os::SuspendResume::State state = osthread->sr.suspended(); 3728 if (state == os::SuspendResume::SR_SUSPENDED) { 3729 sigset_t suspend_set; // signals for sigsuspend() 3730 3731 // get current set of blocked signals and unblock resume signal 3732 thr_sigsetmask(SIG_BLOCK, NULL, &suspend_set); 3733 sigdelset(&suspend_set, os::Solaris::SIGasync()); 3734 3735 sr_semaphore.signal(); 3736 // wait here until we are resumed 3737 while (1) { 3738 sigsuspend(&suspend_set); 3739 3740 os::SuspendResume::State result = osthread->sr.running(); 3741 if (result == os::SuspendResume::SR_RUNNING) { 3742 sr_semaphore.signal(); 3743 break; 3744 } 3745 } 3746 3747 } else if (state == os::SuspendResume::SR_RUNNING) { 3748 // request was cancelled, continue 3749 } else { 3750 ShouldNotReachHere(); 3751 } 3752 3753 resume_clear_context(osthread); 3754 } else if (current == os::SuspendResume::SR_RUNNING) { 3755 // request was cancelled, continue 3756 } else if (current == os::SuspendResume::SR_WAKEUP_REQUEST) { 3757 // ignore 3758 } else { 3759 // ignore 3760 } 3761 3762 errno = old_errno; 3763} 3764 3765void os::print_statistics() { 3766} 3767 3768int os::message_box(const char* title, const char* message) { 3769 int i; 3770 fdStream err(defaultStream::error_fd()); 3771 for (i = 0; i < 78; i++) err.print_raw("="); 3772 err.cr(); 3773 err.print_raw_cr(title); 3774 for (i = 0; i < 78; i++) err.print_raw("-"); 3775 err.cr(); 3776 err.print_raw_cr(message); 3777 for (i = 0; i < 78; i++) err.print_raw("="); 3778 err.cr(); 3779 3780 char buf[16]; 3781 // Prevent process from exiting upon "read error" without consuming all CPU 3782 while (::read(0, buf, sizeof(buf)) <= 0) { ::sleep(100); } 3783 3784 return buf[0] == 'y' || buf[0] == 'Y'; 3785} 3786 3787static int sr_notify(OSThread* osthread) { 3788 int status = thr_kill(osthread->thread_id(), os::Solaris::SIGasync()); 3789 assert_status(status == 0, status, "thr_kill"); 3790 return status; 3791} 3792 3793// "Randomly" selected value for how long we want to spin 3794// before bailing out on suspending a thread, also how often 3795// we send a signal to a thread we want to resume 3796static const int RANDOMLY_LARGE_INTEGER = 1000000; 3797static const int RANDOMLY_LARGE_INTEGER2 = 100; 3798 3799static bool do_suspend(OSThread* osthread) { 3800 assert(osthread->sr.is_running(), "thread should be running"); 3801 assert(!sr_semaphore.trywait(), "semaphore has invalid state"); 3802 3803 // mark as suspended and send signal 3804 if (osthread->sr.request_suspend() != os::SuspendResume::SR_SUSPEND_REQUEST) { 3805 // failed to switch, state wasn't running? 3806 ShouldNotReachHere(); 3807 return false; 3808 } 3809 3810 if (sr_notify(osthread) != 0) { 3811 ShouldNotReachHere(); 3812 } 3813 3814 // managed to send the signal and switch to SUSPEND_REQUEST, now wait for SUSPENDED 3815 while (true) { 3816 if (sr_semaphore.timedwait(0, 2000 * NANOSECS_PER_MILLISEC)) { 3817 break; 3818 } else { 3819 // timeout 3820 os::SuspendResume::State cancelled = osthread->sr.cancel_suspend(); 3821 if (cancelled == os::SuspendResume::SR_RUNNING) { 3822 return false; 3823 } else if (cancelled == os::SuspendResume::SR_SUSPENDED) { 3824 // make sure that we consume the signal on the semaphore as well 3825 sr_semaphore.wait(); 3826 break; 3827 } else { 3828 ShouldNotReachHere(); 3829 return false; 3830 } 3831 } 3832 } 3833 3834 guarantee(osthread->sr.is_suspended(), "Must be suspended"); 3835 return true; 3836} 3837 3838static void do_resume(OSThread* osthread) { 3839 assert(osthread->sr.is_suspended(), "thread should be suspended"); 3840 assert(!sr_semaphore.trywait(), "invalid semaphore state"); 3841 3842 if (osthread->sr.request_wakeup() != os::SuspendResume::SR_WAKEUP_REQUEST) { 3843 // failed to switch to WAKEUP_REQUEST 3844 ShouldNotReachHere(); 3845 return; 3846 } 3847 3848 while (true) { 3849 if (sr_notify(osthread) == 0) { 3850 if (sr_semaphore.timedwait(0, 2 * NANOSECS_PER_MILLISEC)) { 3851 if (osthread->sr.is_running()) { 3852 return; 3853 } 3854 } 3855 } else { 3856 ShouldNotReachHere(); 3857 } 3858 } 3859 3860 guarantee(osthread->sr.is_running(), "Must be running!"); 3861} 3862 3863void os::SuspendedThreadTask::internal_do_task() { 3864 if (do_suspend(_thread->osthread())) { 3865 SuspendedThreadTaskContext context(_thread, _thread->osthread()->ucontext()); 3866 do_task(context); 3867 do_resume(_thread->osthread()); 3868 } 3869} 3870 3871class PcFetcher : public os::SuspendedThreadTask { 3872 public: 3873 PcFetcher(Thread* thread) : os::SuspendedThreadTask(thread) {} 3874 ExtendedPC result(); 3875 protected: 3876 void do_task(const os::SuspendedThreadTaskContext& context); 3877 private: 3878 ExtendedPC _epc; 3879}; 3880 3881ExtendedPC PcFetcher::result() { 3882 guarantee(is_done(), "task is not done yet."); 3883 return _epc; 3884} 3885 3886void PcFetcher::do_task(const os::SuspendedThreadTaskContext& context) { 3887 Thread* thread = context.thread(); 3888 OSThread* osthread = thread->osthread(); 3889 if (osthread->ucontext() != NULL) { 3890 _epc = os::Solaris::ucontext_get_pc((ucontext_t *) context.ucontext()); 3891 } else { 3892 // NULL context is unexpected, double-check this is the VMThread 3893 guarantee(thread->is_VM_thread(), "can only be called for VMThread"); 3894 } 3895} 3896 3897// A lightweight implementation that does not suspend the target thread and 3898// thus returns only a hint. Used for profiling only! 3899ExtendedPC os::get_thread_pc(Thread* thread) { 3900 // Make sure that it is called by the watcher and the Threads lock is owned. 3901 assert(Thread::current()->is_Watcher_thread(), "Must be watcher and own Threads_lock"); 3902 // For now, is only used to profile the VM Thread 3903 assert(thread->is_VM_thread(), "Can only be called for VMThread"); 3904 PcFetcher fetcher(thread); 3905 fetcher.run(); 3906 return fetcher.result(); 3907} 3908 3909 3910// This does not do anything on Solaris. This is basically a hook for being 3911// able to use structured exception handling (thread-local exception filters) on, e.g., Win32. 3912void os::os_exception_wrapper(java_call_t f, JavaValue* value, 3913 methodHandle* method, JavaCallArguments* args, 3914 Thread* thread) { 3915 f(value, method, args, thread); 3916} 3917 3918// This routine may be used by user applications as a "hook" to catch signals. 3919// The user-defined signal handler must pass unrecognized signals to this 3920// routine, and if it returns true (non-zero), then the signal handler must 3921// return immediately. If the flag "abort_if_unrecognized" is true, then this 3922// routine will never retun false (zero), but instead will execute a VM panic 3923// routine kill the process. 3924// 3925// If this routine returns false, it is OK to call it again. This allows 3926// the user-defined signal handler to perform checks either before or after 3927// the VM performs its own checks. Naturally, the user code would be making 3928// a serious error if it tried to handle an exception (such as a null check 3929// or breakpoint) that the VM was generating for its own correct operation. 3930// 3931// This routine may recognize any of the following kinds of signals: 3932// SIGBUS, SIGSEGV, SIGILL, SIGFPE, BREAK_SIGNAL, SIGPIPE, SIGXFSZ, 3933// os::Solaris::SIGasync 3934// It should be consulted by handlers for any of those signals. 3935// It explicitly does not recognize os::Solaris::SIGinterrupt 3936// 3937// The caller of this routine must pass in the three arguments supplied 3938// to the function referred to in the "sa_sigaction" (not the "sa_handler") 3939// field of the structure passed to sigaction(). This routine assumes that 3940// the sa_flags field passed to sigaction() includes SA_SIGINFO and SA_RESTART. 3941// 3942// Note that the VM will print warnings if it detects conflicting signal 3943// handlers, unless invoked with the option "-XX:+AllowUserSignalHandlers". 3944// 3945extern "C" JNIEXPORT int JVM_handle_solaris_signal(int signo, 3946 siginfo_t* siginfo, 3947 void* ucontext, 3948 int abort_if_unrecognized); 3949 3950 3951void signalHandler(int sig, siginfo_t* info, void* ucVoid) { 3952 int orig_errno = errno; // Preserve errno value over signal handler. 3953 JVM_handle_solaris_signal(sig, info, ucVoid, true); 3954 errno = orig_errno; 3955} 3956 3957// Do not delete - if guarantee is ever removed, a signal handler (even empty) 3958// is needed to provoke threads blocked on IO to return an EINTR 3959// Note: this explicitly does NOT call JVM_handle_solaris_signal and 3960// does NOT participate in signal chaining due to requirement for 3961// NOT setting SA_RESTART to make EINTR work. 3962extern "C" void sigINTRHandler(int sig, siginfo_t* info, void* ucVoid) { 3963 if (UseSignalChaining) { 3964 struct sigaction *actp = os::Solaris::get_chained_signal_action(sig); 3965 if (actp && actp->sa_handler) { 3966 vm_exit_during_initialization("Signal chaining detected for VM interrupt signal, try -XX:+UseAltSigs"); 3967 } 3968 } 3969} 3970 3971// This boolean allows users to forward their own non-matching signals 3972// to JVM_handle_solaris_signal, harmlessly. 3973bool os::Solaris::signal_handlers_are_installed = false; 3974 3975// For signal-chaining 3976bool os::Solaris::libjsig_is_loaded = false; 3977typedef struct sigaction *(*get_signal_t)(int); 3978get_signal_t os::Solaris::get_signal_action = NULL; 3979 3980struct sigaction* os::Solaris::get_chained_signal_action(int sig) { 3981 struct sigaction *actp = NULL; 3982 3983 if ((libjsig_is_loaded) && (sig <= Maxlibjsigsigs)) { 3984 // Retrieve the old signal handler from libjsig 3985 actp = (*get_signal_action)(sig); 3986 } 3987 if (actp == NULL) { 3988 // Retrieve the preinstalled signal handler from jvm 3989 actp = get_preinstalled_handler(sig); 3990 } 3991 3992 return actp; 3993} 3994 3995static bool call_chained_handler(struct sigaction *actp, int sig, 3996 siginfo_t *siginfo, void *context) { 3997 // Call the old signal handler 3998 if (actp->sa_handler == SIG_DFL) { 3999 // It's more reasonable to let jvm treat it as an unexpected exception 4000 // instead of taking the default action. 4001 return false; 4002 } else if (actp->sa_handler != SIG_IGN) { 4003 if ((actp->sa_flags & SA_NODEFER) == 0) { 4004 // automaticlly block the signal 4005 sigaddset(&(actp->sa_mask), sig); 4006 } 4007 4008 sa_handler_t hand; 4009 sa_sigaction_t sa; 4010 bool siginfo_flag_set = (actp->sa_flags & SA_SIGINFO) != 0; 4011 // retrieve the chained handler 4012 if (siginfo_flag_set) { 4013 sa = actp->sa_sigaction; 4014 } else { 4015 hand = actp->sa_handler; 4016 } 4017 4018 if ((actp->sa_flags & SA_RESETHAND) != 0) { 4019 actp->sa_handler = SIG_DFL; 4020 } 4021 4022 // try to honor the signal mask 4023 sigset_t oset; 4024 thr_sigsetmask(SIG_SETMASK, &(actp->sa_mask), &oset); 4025 4026 // call into the chained handler 4027 if (siginfo_flag_set) { 4028 (*sa)(sig, siginfo, context); 4029 } else { 4030 (*hand)(sig); 4031 } 4032 4033 // restore the signal mask 4034 thr_sigsetmask(SIG_SETMASK, &oset, 0); 4035 } 4036 // Tell jvm's signal handler the signal is taken care of. 4037 return true; 4038} 4039 4040bool os::Solaris::chained_handler(int sig, siginfo_t* siginfo, void* context) { 4041 bool chained = false; 4042 // signal-chaining 4043 if (UseSignalChaining) { 4044 struct sigaction *actp = get_chained_signal_action(sig); 4045 if (actp != NULL) { 4046 chained = call_chained_handler(actp, sig, siginfo, context); 4047 } 4048 } 4049 return chained; 4050} 4051 4052struct sigaction* os::Solaris::get_preinstalled_handler(int sig) { 4053 assert((chainedsigactions != (struct sigaction *)NULL) && 4054 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4055 if (preinstalled_sigs[sig] != 0) { 4056 return &chainedsigactions[sig]; 4057 } 4058 return NULL; 4059} 4060 4061void os::Solaris::save_preinstalled_handler(int sig, 4062 struct sigaction& oldAct) { 4063 assert(sig > 0 && sig <= Maxsignum, "vm signal out of expected range"); 4064 assert((chainedsigactions != (struct sigaction *)NULL) && 4065 (preinstalled_sigs != (int *)NULL), "signals not yet initialized"); 4066 chainedsigactions[sig] = oldAct; 4067 preinstalled_sigs[sig] = 1; 4068} 4069 4070void os::Solaris::set_signal_handler(int sig, bool set_installed, 4071 bool oktochain) { 4072 // Check for overwrite. 4073 struct sigaction oldAct; 4074 sigaction(sig, (struct sigaction*)NULL, &oldAct); 4075 void* oldhand = 4076 oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4077 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4078 if (oldhand != CAST_FROM_FN_PTR(void*, SIG_DFL) && 4079 oldhand != CAST_FROM_FN_PTR(void*, SIG_IGN) && 4080 oldhand != CAST_FROM_FN_PTR(void*, signalHandler)) { 4081 if (AllowUserSignalHandlers || !set_installed) { 4082 // Do not overwrite; user takes responsibility to forward to us. 4083 return; 4084 } else if (UseSignalChaining) { 4085 if (oktochain) { 4086 // save the old handler in jvm 4087 save_preinstalled_handler(sig, oldAct); 4088 } else { 4089 vm_exit_during_initialization("Signal chaining not allowed for VM interrupt signal, try -XX:+UseAltSigs."); 4090 } 4091 // libjsig also interposes the sigaction() call below and saves the 4092 // old sigaction on it own. 4093 } else { 4094 fatal(err_msg("Encountered unexpected pre-existing sigaction handler " 4095 "%#lx for signal %d.", (long)oldhand, sig)); 4096 } 4097 } 4098 4099 struct sigaction sigAct; 4100 sigfillset(&(sigAct.sa_mask)); 4101 sigAct.sa_handler = SIG_DFL; 4102 4103 sigAct.sa_sigaction = signalHandler; 4104 // Handle SIGSEGV on alternate signal stack if 4105 // not using stack banging 4106 if (!UseStackBanging && sig == SIGSEGV) { 4107 sigAct.sa_flags = SA_SIGINFO | SA_RESTART | SA_ONSTACK; 4108 } else if (sig == os::Solaris::SIGinterrupt()) { 4109 // Interruptible i/o requires SA_RESTART cleared so EINTR 4110 // is returned instead of restarting system calls 4111 sigemptyset(&sigAct.sa_mask); 4112 sigAct.sa_handler = NULL; 4113 sigAct.sa_flags = SA_SIGINFO; 4114 sigAct.sa_sigaction = sigINTRHandler; 4115 } else { 4116 sigAct.sa_flags = SA_SIGINFO | SA_RESTART; 4117 } 4118 os::Solaris::set_our_sigflags(sig, sigAct.sa_flags); 4119 4120 sigaction(sig, &sigAct, &oldAct); 4121 4122 void* oldhand2 = oldAct.sa_sigaction ? CAST_FROM_FN_PTR(void*, oldAct.sa_sigaction) 4123 : CAST_FROM_FN_PTR(void*, oldAct.sa_handler); 4124 assert(oldhand2 == oldhand, "no concurrent signal handler installation"); 4125} 4126 4127 4128#define DO_SIGNAL_CHECK(sig) \ 4129 do { \ 4130 if (!sigismember(&check_signal_done, sig)) { \ 4131 os::Solaris::check_signal_handler(sig); \ 4132 } \ 4133 } while (0) 4134 4135// This method is a periodic task to check for misbehaving JNI applications 4136// under CheckJNI, we can add any periodic checks here 4137 4138void os::run_periodic_checks() { 4139 // A big source of grief is hijacking virt. addr 0x0 on Solaris, 4140 // thereby preventing a NULL checks. 4141 if (!check_addr0_done) check_addr0_done = check_addr0(tty); 4142 4143 if (check_signals == false) return; 4144 4145 // SEGV and BUS if overridden could potentially prevent 4146 // generation of hs*.log in the event of a crash, debugging 4147 // such a case can be very challenging, so we absolutely 4148 // check for the following for a good measure: 4149 DO_SIGNAL_CHECK(SIGSEGV); 4150 DO_SIGNAL_CHECK(SIGILL); 4151 DO_SIGNAL_CHECK(SIGFPE); 4152 DO_SIGNAL_CHECK(SIGBUS); 4153 DO_SIGNAL_CHECK(SIGPIPE); 4154 DO_SIGNAL_CHECK(SIGXFSZ); 4155 4156 // ReduceSignalUsage allows the user to override these handlers 4157 // see comments at the very top and jvm_solaris.h 4158 if (!ReduceSignalUsage) { 4159 DO_SIGNAL_CHECK(SHUTDOWN1_SIGNAL); 4160 DO_SIGNAL_CHECK(SHUTDOWN2_SIGNAL); 4161 DO_SIGNAL_CHECK(SHUTDOWN3_SIGNAL); 4162 DO_SIGNAL_CHECK(BREAK_SIGNAL); 4163 } 4164 4165 // See comments above for using JVM1/JVM2 and UseAltSigs 4166 DO_SIGNAL_CHECK(os::Solaris::SIGinterrupt()); 4167 DO_SIGNAL_CHECK(os::Solaris::SIGasync()); 4168 4169} 4170 4171typedef int (*os_sigaction_t)(int, const struct sigaction *, struct sigaction *); 4172 4173static os_sigaction_t os_sigaction = NULL; 4174 4175void os::Solaris::check_signal_handler(int sig) { 4176 char buf[O_BUFLEN]; 4177 address jvmHandler = NULL; 4178 4179 struct sigaction act; 4180 if (os_sigaction == NULL) { 4181 // only trust the default sigaction, in case it has been interposed 4182 os_sigaction = (os_sigaction_t)dlsym(RTLD_DEFAULT, "sigaction"); 4183 if (os_sigaction == NULL) return; 4184 } 4185 4186 os_sigaction(sig, (struct sigaction*)NULL, &act); 4187 4188 address thisHandler = (act.sa_flags & SA_SIGINFO) 4189 ? CAST_FROM_FN_PTR(address, act.sa_sigaction) 4190 : CAST_FROM_FN_PTR(address, act.sa_handler); 4191 4192 4193 switch (sig) { 4194 case SIGSEGV: 4195 case SIGBUS: 4196 case SIGFPE: 4197 case SIGPIPE: 4198 case SIGXFSZ: 4199 case SIGILL: 4200 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4201 break; 4202 4203 case SHUTDOWN1_SIGNAL: 4204 case SHUTDOWN2_SIGNAL: 4205 case SHUTDOWN3_SIGNAL: 4206 case BREAK_SIGNAL: 4207 jvmHandler = (address)user_handler(); 4208 break; 4209 4210 default: 4211 int intrsig = os::Solaris::SIGinterrupt(); 4212 int asynsig = os::Solaris::SIGasync(); 4213 4214 if (sig == intrsig) { 4215 jvmHandler = CAST_FROM_FN_PTR(address, sigINTRHandler); 4216 } else if (sig == asynsig) { 4217 jvmHandler = CAST_FROM_FN_PTR(address, signalHandler); 4218 } else { 4219 return; 4220 } 4221 break; 4222 } 4223 4224 4225 if (thisHandler != jvmHandler) { 4226 tty->print("Warning: %s handler ", exception_name(sig, buf, O_BUFLEN)); 4227 tty->print("expected:%s", get_signal_handler_name(jvmHandler, buf, O_BUFLEN)); 4228 tty->print_cr(" found:%s", get_signal_handler_name(thisHandler, buf, O_BUFLEN)); 4229 // No need to check this sig any longer 4230 sigaddset(&check_signal_done, sig); 4231 // Running under non-interactive shell, SHUTDOWN2_SIGNAL will be reassigned SIG_IGN 4232 if (sig == SHUTDOWN2_SIGNAL && !isatty(fileno(stdin))) { 4233 tty->print_cr("Running in non-interactive shell, %s handler is replaced by shell", 4234 exception_name(sig, buf, O_BUFLEN)); 4235 } 4236 } else if(os::Solaris::get_our_sigflags(sig) != 0 && act.sa_flags != os::Solaris::get_our_sigflags(sig)) { 4237 tty->print("Warning: %s handler flags ", exception_name(sig, buf, O_BUFLEN)); 4238 tty->print("expected:" PTR32_FORMAT, os::Solaris::get_our_sigflags(sig)); 4239 tty->print_cr(" found:" PTR32_FORMAT, act.sa_flags); 4240 // No need to check this sig any longer 4241 sigaddset(&check_signal_done, sig); 4242 } 4243 4244 // Print all the signal handler state 4245 if (sigismember(&check_signal_done, sig)) { 4246 print_signal_handlers(tty, buf, O_BUFLEN); 4247 } 4248 4249} 4250 4251void os::Solaris::install_signal_handlers() { 4252 bool libjsigdone = false; 4253 signal_handlers_are_installed = true; 4254 4255 // signal-chaining 4256 typedef void (*signal_setting_t)(); 4257 signal_setting_t begin_signal_setting = NULL; 4258 signal_setting_t end_signal_setting = NULL; 4259 begin_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4260 dlsym(RTLD_DEFAULT, "JVM_begin_signal_setting")); 4261 if (begin_signal_setting != NULL) { 4262 end_signal_setting = CAST_TO_FN_PTR(signal_setting_t, 4263 dlsym(RTLD_DEFAULT, "JVM_end_signal_setting")); 4264 get_signal_action = CAST_TO_FN_PTR(get_signal_t, 4265 dlsym(RTLD_DEFAULT, "JVM_get_signal_action")); 4266 get_libjsig_version = CAST_TO_FN_PTR(version_getting_t, 4267 dlsym(RTLD_DEFAULT, "JVM_get_libjsig_version")); 4268 libjsig_is_loaded = true; 4269 if (os::Solaris::get_libjsig_version != NULL) { 4270 libjsigversion = (*os::Solaris::get_libjsig_version)(); 4271 } 4272 assert(UseSignalChaining, "should enable signal-chaining"); 4273 } 4274 if (libjsig_is_loaded) { 4275 // Tell libjsig jvm is setting signal handlers 4276 (*begin_signal_setting)(); 4277 } 4278 4279 set_signal_handler(SIGSEGV, true, true); 4280 set_signal_handler(SIGPIPE, true, true); 4281 set_signal_handler(SIGXFSZ, true, true); 4282 set_signal_handler(SIGBUS, true, true); 4283 set_signal_handler(SIGILL, true, true); 4284 set_signal_handler(SIGFPE, true, true); 4285 4286 4287 if (os::Solaris::SIGinterrupt() > OLDMAXSIGNUM || os::Solaris::SIGasync() > OLDMAXSIGNUM) { 4288 4289 // Pre-1.4.1 Libjsig limited to signal chaining signals <= 32 so 4290 // can not register overridable signals which might be > 32 4291 if (libjsig_is_loaded && libjsigversion <= JSIG_VERSION_1_4_1) { 4292 // Tell libjsig jvm has finished setting signal handlers 4293 (*end_signal_setting)(); 4294 libjsigdone = true; 4295 } 4296 } 4297 4298 // Never ok to chain our SIGinterrupt 4299 set_signal_handler(os::Solaris::SIGinterrupt(), true, false); 4300 set_signal_handler(os::Solaris::SIGasync(), true, true); 4301 4302 if (libjsig_is_loaded && !libjsigdone) { 4303 // Tell libjsig jvm finishes setting signal handlers 4304 (*end_signal_setting)(); 4305 } 4306 4307 // We don't activate signal checker if libjsig is in place, we trust ourselves 4308 // and if UserSignalHandler is installed all bets are off. 4309 // Log that signal checking is off only if -verbose:jni is specified. 4310 if (CheckJNICalls) { 4311 if (libjsig_is_loaded) { 4312 if (PrintJNIResolving) { 4313 tty->print_cr("Info: libjsig is activated, all active signal checking is disabled"); 4314 } 4315 check_signals = false; 4316 } 4317 if (AllowUserSignalHandlers) { 4318 if (PrintJNIResolving) { 4319 tty->print_cr("Info: AllowUserSignalHandlers is activated, all active signal checking is disabled"); 4320 } 4321 check_signals = false; 4322 } 4323 } 4324} 4325 4326 4327void report_error(const char* file_name, int line_no, const char* title, 4328 const char* format, ...); 4329 4330const char * signames[] = { 4331 "SIG0", 4332 "SIGHUP", "SIGINT", "SIGQUIT", "SIGILL", "SIGTRAP", 4333 "SIGABRT", "SIGEMT", "SIGFPE", "SIGKILL", "SIGBUS", 4334 "SIGSEGV", "SIGSYS", "SIGPIPE", "SIGALRM", "SIGTERM", 4335 "SIGUSR1", "SIGUSR2", "SIGCLD", "SIGPWR", "SIGWINCH", 4336 "SIGURG", "SIGPOLL", "SIGSTOP", "SIGTSTP", "SIGCONT", 4337 "SIGTTIN", "SIGTTOU", "SIGVTALRM", "SIGPROF", "SIGXCPU", 4338 "SIGXFSZ", "SIGWAITING", "SIGLWP", "SIGFREEZE", "SIGTHAW", 4339 "SIGCANCEL", "SIGLOST" 4340}; 4341 4342const char* os::exception_name(int exception_code, char* buf, size_t size) { 4343 if (0 < exception_code && exception_code <= SIGRTMAX) { 4344 // signal 4345 if (exception_code < sizeof(signames)/sizeof(const char*)) { 4346 jio_snprintf(buf, size, "%s", signames[exception_code]); 4347 } else { 4348 jio_snprintf(buf, size, "SIG%d", exception_code); 4349 } 4350 return buf; 4351 } else { 4352 return NULL; 4353 } 4354} 4355 4356// (Static) wrapper for getisax(2) call. 4357os::Solaris::getisax_func_t os::Solaris::_getisax = 0; 4358 4359// (Static) wrappers for the liblgrp API 4360os::Solaris::lgrp_home_func_t os::Solaris::_lgrp_home; 4361os::Solaris::lgrp_init_func_t os::Solaris::_lgrp_init; 4362os::Solaris::lgrp_fini_func_t os::Solaris::_lgrp_fini; 4363os::Solaris::lgrp_root_func_t os::Solaris::_lgrp_root; 4364os::Solaris::lgrp_children_func_t os::Solaris::_lgrp_children; 4365os::Solaris::lgrp_resources_func_t os::Solaris::_lgrp_resources; 4366os::Solaris::lgrp_nlgrps_func_t os::Solaris::_lgrp_nlgrps; 4367os::Solaris::lgrp_cookie_stale_func_t os::Solaris::_lgrp_cookie_stale; 4368os::Solaris::lgrp_cookie_t os::Solaris::_lgrp_cookie = 0; 4369 4370// (Static) wrapper for meminfo() call. 4371os::Solaris::meminfo_func_t os::Solaris::_meminfo = 0; 4372 4373static address resolve_symbol_lazy(const char* name) { 4374 address addr = (address) dlsym(RTLD_DEFAULT, name); 4375 if (addr == NULL) { 4376 // RTLD_DEFAULT was not defined on some early versions of 2.5.1 4377 addr = (address) dlsym(RTLD_NEXT, name); 4378 } 4379 return addr; 4380} 4381 4382static address resolve_symbol(const char* name) { 4383 address addr = resolve_symbol_lazy(name); 4384 if (addr == NULL) { 4385 fatal(dlerror()); 4386 } 4387 return addr; 4388} 4389 4390void os::Solaris::libthread_init() { 4391 address func = (address)dlsym(RTLD_DEFAULT, "_thr_suspend_allmutators"); 4392 4393 lwp_priocntl_init(); 4394 4395 // RTLD_DEFAULT was not defined on some early versions of 5.5.1 4396 if (func == NULL) { 4397 func = (address) dlsym(RTLD_NEXT, "_thr_suspend_allmutators"); 4398 // Guarantee that this VM is running on an new enough OS (5.6 or 4399 // later) that it will have a new enough libthread.so. 4400 guarantee(func != NULL, "libthread.so is too old."); 4401 } 4402 4403 int size; 4404 void (*handler_info_func)(address *, int *); 4405 handler_info_func = CAST_TO_FN_PTR(void (*)(address *, int *), resolve_symbol("thr_sighndlrinfo")); 4406 handler_info_func(&handler_start, &size); 4407 handler_end = handler_start + size; 4408} 4409 4410 4411int_fnP_mutex_tP os::Solaris::_mutex_lock; 4412int_fnP_mutex_tP os::Solaris::_mutex_trylock; 4413int_fnP_mutex_tP os::Solaris::_mutex_unlock; 4414int_fnP_mutex_tP_i_vP os::Solaris::_mutex_init; 4415int_fnP_mutex_tP os::Solaris::_mutex_destroy; 4416int os::Solaris::_mutex_scope = USYNC_THREAD; 4417 4418int_fnP_cond_tP_mutex_tP_timestruc_tP os::Solaris::_cond_timedwait; 4419int_fnP_cond_tP_mutex_tP os::Solaris::_cond_wait; 4420int_fnP_cond_tP os::Solaris::_cond_signal; 4421int_fnP_cond_tP os::Solaris::_cond_broadcast; 4422int_fnP_cond_tP_i_vP os::Solaris::_cond_init; 4423int_fnP_cond_tP os::Solaris::_cond_destroy; 4424int os::Solaris::_cond_scope = USYNC_THREAD; 4425 4426void os::Solaris::synchronization_init() { 4427 if (UseLWPSynchronization) { 4428 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_lock"))); 4429 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_trylock"))); 4430 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("_lwp_mutex_unlock"))); 4431 os::Solaris::set_mutex_init(lwp_mutex_init); 4432 os::Solaris::set_mutex_destroy(lwp_mutex_destroy); 4433 os::Solaris::set_mutex_scope(USYNC_THREAD); 4434 4435 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("_lwp_cond_timedwait"))); 4436 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("_lwp_cond_wait"))); 4437 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_signal"))); 4438 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("_lwp_cond_broadcast"))); 4439 os::Solaris::set_cond_init(lwp_cond_init); 4440 os::Solaris::set_cond_destroy(lwp_cond_destroy); 4441 os::Solaris::set_cond_scope(USYNC_THREAD); 4442 } else { 4443 os::Solaris::set_mutex_scope(USYNC_THREAD); 4444 os::Solaris::set_cond_scope(USYNC_THREAD); 4445 4446 if (UsePthreads) { 4447 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_lock"))); 4448 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_trylock"))); 4449 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_unlock"))); 4450 os::Solaris::set_mutex_init(pthread_mutex_default_init); 4451 os::Solaris::set_mutex_destroy(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("pthread_mutex_destroy"))); 4452 4453 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("pthread_cond_timedwait"))); 4454 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("pthread_cond_wait"))); 4455 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_signal"))); 4456 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_broadcast"))); 4457 os::Solaris::set_cond_init(pthread_cond_default_init); 4458 os::Solaris::set_cond_destroy(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("pthread_cond_destroy"))); 4459 } else { 4460 os::Solaris::set_mutex_lock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_lock"))); 4461 os::Solaris::set_mutex_trylock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_trylock"))); 4462 os::Solaris::set_mutex_unlock(CAST_TO_FN_PTR(int_fnP_mutex_tP, resolve_symbol("mutex_unlock"))); 4463 os::Solaris::set_mutex_init(::mutex_init); 4464 os::Solaris::set_mutex_destroy(::mutex_destroy); 4465 4466 os::Solaris::set_cond_timedwait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP_timestruc_tP, resolve_symbol("cond_timedwait"))); 4467 os::Solaris::set_cond_wait(CAST_TO_FN_PTR(int_fnP_cond_tP_mutex_tP, resolve_symbol("cond_wait"))); 4468 os::Solaris::set_cond_signal(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_signal"))); 4469 os::Solaris::set_cond_broadcast(CAST_TO_FN_PTR(int_fnP_cond_tP, resolve_symbol("cond_broadcast"))); 4470 os::Solaris::set_cond_init(::cond_init); 4471 os::Solaris::set_cond_destroy(::cond_destroy); 4472 } 4473 } 4474} 4475 4476bool os::Solaris::liblgrp_init() { 4477 void *handle = dlopen("liblgrp.so.1", RTLD_LAZY); 4478 if (handle != NULL) { 4479 os::Solaris::set_lgrp_home(CAST_TO_FN_PTR(lgrp_home_func_t, dlsym(handle, "lgrp_home"))); 4480 os::Solaris::set_lgrp_init(CAST_TO_FN_PTR(lgrp_init_func_t, dlsym(handle, "lgrp_init"))); 4481 os::Solaris::set_lgrp_fini(CAST_TO_FN_PTR(lgrp_fini_func_t, dlsym(handle, "lgrp_fini"))); 4482 os::Solaris::set_lgrp_root(CAST_TO_FN_PTR(lgrp_root_func_t, dlsym(handle, "lgrp_root"))); 4483 os::Solaris::set_lgrp_children(CAST_TO_FN_PTR(lgrp_children_func_t, dlsym(handle, "lgrp_children"))); 4484 os::Solaris::set_lgrp_resources(CAST_TO_FN_PTR(lgrp_resources_func_t, dlsym(handle, "lgrp_resources"))); 4485 os::Solaris::set_lgrp_nlgrps(CAST_TO_FN_PTR(lgrp_nlgrps_func_t, dlsym(handle, "lgrp_nlgrps"))); 4486 os::Solaris::set_lgrp_cookie_stale(CAST_TO_FN_PTR(lgrp_cookie_stale_func_t, 4487 dlsym(handle, "lgrp_cookie_stale"))); 4488 4489 lgrp_cookie_t c = lgrp_init(LGRP_VIEW_CALLER); 4490 set_lgrp_cookie(c); 4491 return true; 4492 } 4493 return false; 4494} 4495 4496void os::Solaris::misc_sym_init() { 4497 address func; 4498 4499 // getisax 4500 func = resolve_symbol_lazy("getisax"); 4501 if (func != NULL) { 4502 os::Solaris::_getisax = CAST_TO_FN_PTR(getisax_func_t, func); 4503 } 4504 4505 // meminfo 4506 func = resolve_symbol_lazy("meminfo"); 4507 if (func != NULL) { 4508 os::Solaris::set_meminfo(CAST_TO_FN_PTR(meminfo_func_t, func)); 4509 } 4510} 4511 4512uint_t os::Solaris::getisax(uint32_t* array, uint_t n) { 4513 assert(_getisax != NULL, "_getisax not set"); 4514 return _getisax(array, n); 4515} 4516 4517// int pset_getloadavg(psetid_t pset, double loadavg[], int nelem); 4518typedef long (*pset_getloadavg_type)(psetid_t pset, double loadavg[], int nelem); 4519static pset_getloadavg_type pset_getloadavg_ptr = NULL; 4520 4521void init_pset_getloadavg_ptr(void) { 4522 pset_getloadavg_ptr = 4523 (pset_getloadavg_type)dlsym(RTLD_DEFAULT, "pset_getloadavg"); 4524 if (PrintMiscellaneous && Verbose && pset_getloadavg_ptr == NULL) { 4525 warning("pset_getloadavg function not found"); 4526 } 4527} 4528 4529int os::Solaris::_dev_zero_fd = -1; 4530 4531// this is called _before_ the global arguments have been parsed 4532void os::init(void) { 4533 _initial_pid = getpid(); 4534 4535 max_hrtime = first_hrtime = gethrtime(); 4536 4537 init_random(1234567); 4538 4539 page_size = sysconf(_SC_PAGESIZE); 4540 if (page_size == -1) { 4541 fatal(err_msg("os_solaris.cpp: os::init: sysconf failed (%s)", 4542 strerror(errno))); 4543 } 4544 init_page_sizes((size_t) page_size); 4545 4546 Solaris::initialize_system_info(); 4547 4548 // Initialize misc. symbols as soon as possible, so we can use them 4549 // if we need them. 4550 Solaris::misc_sym_init(); 4551 4552 int fd = ::open("/dev/zero", O_RDWR); 4553 if (fd < 0) { 4554 fatal(err_msg("os::init: cannot open /dev/zero (%s)", strerror(errno))); 4555 } else { 4556 Solaris::set_dev_zero_fd(fd); 4557 4558 // Close on exec, child won't inherit. 4559 fcntl(fd, F_SETFD, FD_CLOEXEC); 4560 } 4561 4562 clock_tics_per_sec = CLK_TCK; 4563 4564 // check if dladdr1() exists; dladdr1 can provide more information than 4565 // dladdr for os::dll_address_to_function_name. It comes with SunOS 5.9 4566 // and is available on linker patches for 5.7 and 5.8. 4567 // libdl.so must have been loaded, this call is just an entry lookup 4568 void * hdl = dlopen("libdl.so", RTLD_NOW); 4569 if (hdl) { 4570 dladdr1_func = CAST_TO_FN_PTR(dladdr1_func_type, dlsym(hdl, "dladdr1")); 4571 } 4572 4573 // (Solaris only) this switches to calls that actually do locking. 4574 ThreadCritical::initialize(); 4575 4576 main_thread = thr_self(); 4577 4578 // Constant minimum stack size allowed. It must be at least 4579 // the minimum of what the OS supports (thr_min_stack()), and 4580 // enough to allow the thread to get to user bytecode execution. 4581 Solaris::min_stack_allowed = MAX2(thr_min_stack(), Solaris::min_stack_allowed); 4582 // If the pagesize of the VM is greater than 8K determine the appropriate 4583 // number of initial guard pages. The user can change this with the 4584 // command line arguments, if needed. 4585 if (vm_page_size() > 8*K) { 4586 StackYellowPages = 1; 4587 StackRedPages = 1; 4588 StackShadowPages = round_to((StackShadowPages*8*K), vm_page_size()) / vm_page_size(); 4589 } 4590} 4591 4592// To install functions for atexit system call 4593extern "C" { 4594 static void perfMemory_exit_helper() { 4595 perfMemory_exit(); 4596 } 4597} 4598 4599// this is called _after_ the global arguments have been parsed 4600jint os::init_2(void) { 4601 // try to enable extended file IO ASAP, see 6431278 4602 os::Solaris::try_enable_extended_io(); 4603 4604 // Allocate a single page and mark it as readable for safepoint polling. Also 4605 // use this first mmap call to check support for MAP_ALIGN. 4606 address polling_page = (address)Solaris::mmap_chunk((char*)page_size, 4607 page_size, 4608 MAP_PRIVATE | MAP_ALIGN, 4609 PROT_READ); 4610 if (polling_page == NULL) { 4611 has_map_align = false; 4612 polling_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, 4613 PROT_READ); 4614 } 4615 4616 os::set_polling_page(polling_page); 4617 4618#ifndef PRODUCT 4619 if (Verbose && PrintMiscellaneous) { 4620 tty->print("[SafePoint Polling address: " INTPTR_FORMAT "]\n", 4621 (intptr_t)polling_page); 4622 } 4623#endif 4624 4625 if (!UseMembar) { 4626 address mem_serialize_page = (address)Solaris::mmap_chunk(NULL, page_size, MAP_PRIVATE, PROT_READ | PROT_WRITE); 4627 guarantee(mem_serialize_page != NULL, "mmap Failed for memory serialize page"); 4628 os::set_memory_serialize_page(mem_serialize_page); 4629 4630#ifndef PRODUCT 4631 if (Verbose && PrintMiscellaneous) { 4632 tty->print("[Memory Serialize Page address: " INTPTR_FORMAT "]\n", 4633 (intptr_t)mem_serialize_page); 4634 } 4635#endif 4636 } 4637 4638 // Check minimum allowable stack size for thread creation and to initialize 4639 // the java system classes, including StackOverflowError - depends on page 4640 // size. Add a page for compiler2 recursion in main thread. 4641 // Add in 2*BytesPerWord times page size to account for VM stack during 4642 // class initialization depending on 32 or 64 bit VM. 4643 os::Solaris::min_stack_allowed = MAX2(os::Solaris::min_stack_allowed, 4644 (size_t)(StackYellowPages+StackRedPages+StackShadowPages+ 4645 2*BytesPerWord COMPILER2_PRESENT(+1)) * page_size); 4646 4647 size_t threadStackSizeInBytes = ThreadStackSize * K; 4648 if (threadStackSizeInBytes != 0 && 4649 threadStackSizeInBytes < os::Solaris::min_stack_allowed) { 4650 tty->print_cr("\nThe stack size specified is too small, Specify at least %dk", 4651 os::Solaris::min_stack_allowed/K); 4652 return JNI_ERR; 4653 } 4654 4655 // For 64kbps there will be a 64kb page size, which makes 4656 // the usable default stack size quite a bit less. Increase the 4657 // stack for 64kb (or any > than 8kb) pages, this increases 4658 // virtual memory fragmentation (since we're not creating the 4659 // stack on a power of 2 boundary. The real fix for this 4660 // should be to fix the guard page mechanism. 4661 4662 if (vm_page_size() > 8*K) { 4663 threadStackSizeInBytes = (threadStackSizeInBytes != 0) 4664 ? threadStackSizeInBytes + 4665 ((StackYellowPages + StackRedPages) * vm_page_size()) 4666 : 0; 4667 ThreadStackSize = threadStackSizeInBytes/K; 4668 } 4669 4670 // Make the stack size a multiple of the page size so that 4671 // the yellow/red zones can be guarded. 4672 JavaThread::set_stack_size_at_create(round_to(threadStackSizeInBytes, 4673 vm_page_size())); 4674 4675 Solaris::libthread_init(); 4676 4677 if (UseNUMA) { 4678 if (!Solaris::liblgrp_init()) { 4679 UseNUMA = false; 4680 } else { 4681 size_t lgrp_limit = os::numa_get_groups_num(); 4682 int *lgrp_ids = NEW_C_HEAP_ARRAY(int, lgrp_limit, mtInternal); 4683 size_t lgrp_num = os::numa_get_leaf_groups(lgrp_ids, lgrp_limit); 4684 FREE_C_HEAP_ARRAY(int, lgrp_ids, mtInternal); 4685 if (lgrp_num < 2) { 4686 // There's only one locality group, disable NUMA. 4687 UseNUMA = false; 4688 } 4689 } 4690 if (!UseNUMA && ForceNUMA) { 4691 UseNUMA = true; 4692 } 4693 } 4694 4695 Solaris::signal_sets_init(); 4696 Solaris::init_signal_mem(); 4697 Solaris::install_signal_handlers(); 4698 4699 if (libjsigversion < JSIG_VERSION_1_4_1) { 4700 Maxlibjsigsigs = OLDMAXSIGNUM; 4701 } 4702 4703 // initialize synchronization primitives to use either thread or 4704 // lwp synchronization (controlled by UseLWPSynchronization) 4705 Solaris::synchronization_init(); 4706 4707 if (MaxFDLimit) { 4708 // set the number of file descriptors to max. print out error 4709 // if getrlimit/setrlimit fails but continue regardless. 4710 struct rlimit nbr_files; 4711 int status = getrlimit(RLIMIT_NOFILE, &nbr_files); 4712 if (status != 0) { 4713 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4714 perror("os::init_2 getrlimit failed"); 4715 } 4716 } else { 4717 nbr_files.rlim_cur = nbr_files.rlim_max; 4718 status = setrlimit(RLIMIT_NOFILE, &nbr_files); 4719 if (status != 0) { 4720 if (PrintMiscellaneous && (Verbose || WizardMode)) { 4721 perror("os::init_2 setrlimit failed"); 4722 } 4723 } 4724 } 4725 } 4726 4727 // Calculate theoretical max. size of Threads to guard gainst 4728 // artifical out-of-memory situations, where all available address- 4729 // space has been reserved by thread stacks. Default stack size is 1Mb. 4730 size_t pre_thread_stack_size = (JavaThread::stack_size_at_create()) ? 4731 JavaThread::stack_size_at_create() : (1*K*K); 4732 assert(pre_thread_stack_size != 0, "Must have a stack"); 4733 // Solaris has a maximum of 4Gb of user programs. Calculate the thread limit when 4734 // we should start doing Virtual Memory banging. Currently when the threads will 4735 // have used all but 200Mb of space. 4736 size_t max_address_space = ((unsigned int)4 * K * K * K) - (200 * K * K); 4737 Solaris::_os_thread_limit = max_address_space / pre_thread_stack_size; 4738 4739 // at-exit methods are called in the reverse order of their registration. 4740 // In Solaris 7 and earlier, atexit functions are called on return from 4741 // main or as a result of a call to exit(3C). There can be only 32 of 4742 // these functions registered and atexit() does not set errno. In Solaris 4743 // 8 and later, there is no limit to the number of functions registered 4744 // and atexit() sets errno. In addition, in Solaris 8 and later, atexit 4745 // functions are called upon dlclose(3DL) in addition to return from main 4746 // and exit(3C). 4747 4748 if (PerfAllowAtExitRegistration) { 4749 // only register atexit functions if PerfAllowAtExitRegistration is set. 4750 // atexit functions can be delayed until process exit time, which 4751 // can be problematic for embedded VM situations. Embedded VMs should 4752 // call DestroyJavaVM() to assure that VM resources are released. 4753 4754 // note: perfMemory_exit_helper atexit function may be removed in 4755 // the future if the appropriate cleanup code can be added to the 4756 // VM_Exit VMOperation's doit method. 4757 if (atexit(perfMemory_exit_helper) != 0) { 4758 warning("os::init2 atexit(perfMemory_exit_helper) failed"); 4759 } 4760 } 4761 4762 // Init pset_loadavg function pointer 4763 init_pset_getloadavg_ptr(); 4764 4765 return JNI_OK; 4766} 4767 4768// Mark the polling page as unreadable 4769void os::make_polling_page_unreadable(void) { 4770 if (mprotect((char *)_polling_page, page_size, PROT_NONE) != 0) { 4771 fatal("Could not disable polling page"); 4772 } 4773} 4774 4775// Mark the polling page as readable 4776void os::make_polling_page_readable(void) { 4777 if (mprotect((char *)_polling_page, page_size, PROT_READ) != 0) { 4778 fatal("Could not enable polling page"); 4779 } 4780} 4781 4782// OS interface. 4783 4784bool os::check_heap(bool force) { return true; } 4785 4786// Is a (classpath) directory empty? 4787bool os::dir_is_empty(const char* path) { 4788 DIR *dir = NULL; 4789 struct dirent *ptr; 4790 4791 dir = opendir(path); 4792 if (dir == NULL) return true; 4793 4794 // Scan the directory 4795 bool result = true; 4796 char buf[sizeof(struct dirent) + MAX_PATH]; 4797 struct dirent *dbuf = (struct dirent *) buf; 4798 while (result && (ptr = readdir(dir, dbuf)) != NULL) { 4799 if (strcmp(ptr->d_name, ".") != 0 && strcmp(ptr->d_name, "..") != 0) { 4800 result = false; 4801 } 4802 } 4803 closedir(dir); 4804 return result; 4805} 4806 4807// This code originates from JDK's sysOpen and open64_w 4808// from src/solaris/hpi/src/system_md.c 4809 4810int os::open(const char *path, int oflag, int mode) { 4811 if (strlen(path) > MAX_PATH - 1) { 4812 errno = ENAMETOOLONG; 4813 return -1; 4814 } 4815 int fd; 4816 4817 fd = ::open64(path, oflag, mode); 4818 if (fd == -1) return -1; 4819 4820 // If the open succeeded, the file might still be a directory 4821 { 4822 struct stat64 buf64; 4823 int ret = ::fstat64(fd, &buf64); 4824 int st_mode = buf64.st_mode; 4825 4826 if (ret != -1) { 4827 if ((st_mode & S_IFMT) == S_IFDIR) { 4828 errno = EISDIR; 4829 ::close(fd); 4830 return -1; 4831 } 4832 } else { 4833 ::close(fd); 4834 return -1; 4835 } 4836 } 4837 4838 // 32-bit Solaris systems suffer from: 4839 // 4840 // - an historical default soft limit of 256 per-process file 4841 // descriptors that is too low for many Java programs. 4842 // 4843 // - a design flaw where file descriptors created using stdio 4844 // fopen must be less than 256, _even_ when the first limit above 4845 // has been raised. This can cause calls to fopen (but not calls to 4846 // open, for example) to fail mysteriously, perhaps in 3rd party 4847 // native code (although the JDK itself uses fopen). One can hardly 4848 // criticize them for using this most standard of all functions. 4849 // 4850 // We attempt to make everything work anyways by: 4851 // 4852 // - raising the soft limit on per-process file descriptors beyond 4853 // 256 4854 // 4855 // - As of Solaris 10u4, we can request that Solaris raise the 256 4856 // stdio fopen limit by calling function enable_extended_FILE_stdio. 4857 // This is done in init_2 and recorded in enabled_extended_FILE_stdio 4858 // 4859 // - If we are stuck on an old (pre 10u4) Solaris system, we can 4860 // workaround the bug by remapping non-stdio file descriptors below 4861 // 256 to ones beyond 256, which is done below. 4862 // 4863 // See: 4864 // 1085341: 32-bit stdio routines should support file descriptors >255 4865 // 6533291: Work around 32-bit Solaris stdio limit of 256 open files 4866 // 6431278: Netbeans crash on 32 bit Solaris: need to call 4867 // enable_extended_FILE_stdio() in VM initialisation 4868 // Giri Mandalika's blog 4869 // http://technopark02.blogspot.com/2005_05_01_archive.html 4870 // 4871#ifndef _LP64 4872 if ((!enabled_extended_FILE_stdio) && fd < 256) { 4873 int newfd = ::fcntl(fd, F_DUPFD, 256); 4874 if (newfd != -1) { 4875 ::close(fd); 4876 fd = newfd; 4877 } 4878 } 4879#endif // 32-bit Solaris 4880 4881 // All file descriptors that are opened in the JVM and not 4882 // specifically destined for a subprocess should have the 4883 // close-on-exec flag set. If we don't set it, then careless 3rd 4884 // party native code might fork and exec without closing all 4885 // appropriate file descriptors (e.g. as we do in closeDescriptors in 4886 // UNIXProcess.c), and this in turn might: 4887 // 4888 // - cause end-of-file to fail to be detected on some file 4889 // descriptors, resulting in mysterious hangs, or 4890 // 4891 // - might cause an fopen in the subprocess to fail on a system 4892 // suffering from bug 1085341. 4893 // 4894 // (Yes, the default setting of the close-on-exec flag is a Unix 4895 // design flaw) 4896 // 4897 // See: 4898 // 1085341: 32-bit stdio routines should support file descriptors >255 4899 // 4843136: (process) pipe file descriptor from Runtime.exec not being closed 4900 // 6339493: (process) Runtime.exec does not close all file descriptors on Solaris 9 4901 // 4902#ifdef FD_CLOEXEC 4903 { 4904 int flags = ::fcntl(fd, F_GETFD); 4905 if (flags != -1) { 4906 ::fcntl(fd, F_SETFD, flags | FD_CLOEXEC); 4907 } 4908 } 4909#endif 4910 4911 return fd; 4912} 4913 4914// create binary file, rewriting existing file if required 4915int os::create_binary_file(const char* path, bool rewrite_existing) { 4916 int oflags = O_WRONLY | O_CREAT; 4917 if (!rewrite_existing) { 4918 oflags |= O_EXCL; 4919 } 4920 return ::open64(path, oflags, S_IREAD | S_IWRITE); 4921} 4922 4923// return current position of file pointer 4924jlong os::current_file_offset(int fd) { 4925 return (jlong)::lseek64(fd, (off64_t)0, SEEK_CUR); 4926} 4927 4928// move file pointer to the specified offset 4929jlong os::seek_to_file_offset(int fd, jlong offset) { 4930 return (jlong)::lseek64(fd, (off64_t)offset, SEEK_SET); 4931} 4932 4933jlong os::lseek(int fd, jlong offset, int whence) { 4934 return (jlong) ::lseek64(fd, offset, whence); 4935} 4936 4937char * os::native_path(char *path) { 4938 return path; 4939} 4940 4941int os::ftruncate(int fd, jlong length) { 4942 return ::ftruncate64(fd, length); 4943} 4944 4945int os::fsync(int fd) { 4946 RESTARTABLE_RETURN_INT(::fsync(fd)); 4947} 4948 4949int os::available(int fd, jlong *bytes) { 4950 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 4951 "Assumed _thread_in_native"); 4952 jlong cur, end; 4953 int mode; 4954 struct stat64 buf64; 4955 4956 if (::fstat64(fd, &buf64) >= 0) { 4957 mode = buf64.st_mode; 4958 if (S_ISCHR(mode) || S_ISFIFO(mode) || S_ISSOCK(mode)) { 4959 int n,ioctl_return; 4960 4961 RESTARTABLE(::ioctl(fd, FIONREAD, &n), ioctl_return); 4962 if (ioctl_return>= 0) { 4963 *bytes = n; 4964 return 1; 4965 } 4966 } 4967 } 4968 if ((cur = ::lseek64(fd, 0L, SEEK_CUR)) == -1) { 4969 return 0; 4970 } else if ((end = ::lseek64(fd, 0L, SEEK_END)) == -1) { 4971 return 0; 4972 } else if (::lseek64(fd, cur, SEEK_SET) == -1) { 4973 return 0; 4974 } 4975 *bytes = end - cur; 4976 return 1; 4977} 4978 4979// Map a block of memory. 4980char* os::pd_map_memory(int fd, const char* file_name, size_t file_offset, 4981 char *addr, size_t bytes, bool read_only, 4982 bool allow_exec) { 4983 int prot; 4984 int flags; 4985 4986 if (read_only) { 4987 prot = PROT_READ; 4988 flags = MAP_SHARED; 4989 } else { 4990 prot = PROT_READ | PROT_WRITE; 4991 flags = MAP_PRIVATE; 4992 } 4993 4994 if (allow_exec) { 4995 prot |= PROT_EXEC; 4996 } 4997 4998 if (addr != NULL) { 4999 flags |= MAP_FIXED; 5000 } 5001 5002 char* mapped_address = (char*)mmap(addr, (size_t)bytes, prot, flags, 5003 fd, file_offset); 5004 if (mapped_address == MAP_FAILED) { 5005 return NULL; 5006 } 5007 return mapped_address; 5008} 5009 5010 5011// Remap a block of memory. 5012char* os::pd_remap_memory(int fd, const char* file_name, size_t file_offset, 5013 char *addr, size_t bytes, bool read_only, 5014 bool allow_exec) { 5015 // same as map_memory() on this OS 5016 return os::map_memory(fd, file_name, file_offset, addr, bytes, read_only, 5017 allow_exec); 5018} 5019 5020 5021// Unmap a block of memory. 5022bool os::pd_unmap_memory(char* addr, size_t bytes) { 5023 return munmap(addr, bytes) == 0; 5024} 5025 5026void os::pause() { 5027 char filename[MAX_PATH]; 5028 if (PauseAtStartupFile && PauseAtStartupFile[0]) { 5029 jio_snprintf(filename, MAX_PATH, PauseAtStartupFile); 5030 } else { 5031 jio_snprintf(filename, MAX_PATH, "./vm.paused.%d", current_process_id()); 5032 } 5033 5034 int fd = ::open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); 5035 if (fd != -1) { 5036 struct stat buf; 5037 ::close(fd); 5038 while (::stat(filename, &buf) == 0) { 5039 (void)::poll(NULL, 0, 100); 5040 } 5041 } else { 5042 jio_fprintf(stderr, 5043 "Could not open pause file '%s', continuing immediately.\n", filename); 5044 } 5045} 5046 5047#ifndef PRODUCT 5048#ifdef INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5049// Turn this on if you need to trace synch operations. 5050// Set RECORD_SYNCH_LIMIT to a large-enough value, 5051// and call record_synch_enable and record_synch_disable 5052// around the computation of interest. 5053 5054void record_synch(char* name, bool returning); // defined below 5055 5056class RecordSynch { 5057 char* _name; 5058 public: 5059 RecordSynch(char* name) :_name(name) { record_synch(_name, false); } 5060 ~RecordSynch() { record_synch(_name, true); } 5061}; 5062 5063#define CHECK_SYNCH_OP(ret, name, params, args, inner) \ 5064extern "C" ret name params { \ 5065 typedef ret name##_t params; \ 5066 static name##_t* implem = NULL; \ 5067 static int callcount = 0; \ 5068 if (implem == NULL) { \ 5069 implem = (name##_t*) dlsym(RTLD_NEXT, #name); \ 5070 if (implem == NULL) fatal(dlerror()); \ 5071 } \ 5072 ++callcount; \ 5073 RecordSynch _rs(#name); \ 5074 inner; \ 5075 return implem args; \ 5076} 5077// in dbx, examine callcounts this way: 5078// for n in $(eval whereis callcount | awk '{print $2}'); do print $n; done 5079 5080#define CHECK_POINTER_OK(p) \ 5081 (!Universe::is_fully_initialized() || !Universe::is_reserved_heap((oop)(p))) 5082#define CHECK_MU \ 5083 if (!CHECK_POINTER_OK(mu)) fatal("Mutex must be in C heap only."); 5084#define CHECK_CV \ 5085 if (!CHECK_POINTER_OK(cv)) fatal("Condvar must be in C heap only."); 5086#define CHECK_P(p) \ 5087 if (!CHECK_POINTER_OK(p)) fatal(false, "Pointer must be in C heap only."); 5088 5089#define CHECK_MUTEX(mutex_op) \ 5090 CHECK_SYNCH_OP(int, mutex_op, (mutex_t *mu), (mu), CHECK_MU); 5091 5092CHECK_MUTEX( mutex_lock) 5093CHECK_MUTEX( _mutex_lock) 5094CHECK_MUTEX( mutex_unlock) 5095CHECK_MUTEX(_mutex_unlock) 5096CHECK_MUTEX( mutex_trylock) 5097CHECK_MUTEX(_mutex_trylock) 5098 5099#define CHECK_COND(cond_op) \ 5100 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu), (cv, mu), CHECK_MU; CHECK_CV); 5101 5102CHECK_COND( cond_wait); 5103CHECK_COND(_cond_wait); 5104CHECK_COND(_cond_wait_cancel); 5105 5106#define CHECK_COND2(cond_op) \ 5107 CHECK_SYNCH_OP(int, cond_op, (cond_t *cv, mutex_t *mu, timestruc_t* ts), (cv, mu, ts), CHECK_MU; CHECK_CV); 5108 5109CHECK_COND2( cond_timedwait); 5110CHECK_COND2(_cond_timedwait); 5111CHECK_COND2(_cond_timedwait_cancel); 5112 5113// do the _lwp_* versions too 5114#define mutex_t lwp_mutex_t 5115#define cond_t lwp_cond_t 5116CHECK_MUTEX( _lwp_mutex_lock) 5117CHECK_MUTEX( _lwp_mutex_unlock) 5118CHECK_MUTEX( _lwp_mutex_trylock) 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) 5124 5125CHECK_COND( _lwp_cond_wait); 5126CHECK_COND( __lwp_cond_wait); 5127CHECK_COND(___lwp_cond_wait); 5128 5129CHECK_COND2( _lwp_cond_timedwait); 5130CHECK_COND2( __lwp_cond_timedwait); 5131#undef mutex_t 5132#undef cond_t 5133 5134CHECK_SYNCH_OP(int, _lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5135CHECK_SYNCH_OP(int,__lwp_suspend2, (int lwp, int *n), (lwp, n), 0); 5136CHECK_SYNCH_OP(int, _lwp_kill, (int lwp, int n), (lwp, n), 0); 5137CHECK_SYNCH_OP(int,__lwp_kill, (int lwp, int n), (lwp, n), 0); 5138CHECK_SYNCH_OP(int, _lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5139CHECK_SYNCH_OP(int,__lwp_sema_wait, (lwp_sema_t* p), (p), CHECK_P(p)); 5140CHECK_SYNCH_OP(int, _lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5141CHECK_SYNCH_OP(int,__lwp_cond_broadcast, (lwp_cond_t* cv), (cv), CHECK_CV); 5142 5143 5144// recording machinery: 5145 5146enum { RECORD_SYNCH_LIMIT = 200 }; 5147char* record_synch_name[RECORD_SYNCH_LIMIT]; 5148void* record_synch_arg0ptr[RECORD_SYNCH_LIMIT]; 5149bool record_synch_returning[RECORD_SYNCH_LIMIT]; 5150thread_t record_synch_thread[RECORD_SYNCH_LIMIT]; 5151int record_synch_count = 0; 5152bool record_synch_enabled = false; 5153 5154// in dbx, examine recorded data this way: 5155// for n in name arg0ptr returning thread; do print record_synch_$n[0..record_synch_count-1]; done 5156 5157void record_synch(char* name, bool returning) { 5158 if (record_synch_enabled) { 5159 if (record_synch_count < RECORD_SYNCH_LIMIT) { 5160 record_synch_name[record_synch_count] = name; 5161 record_synch_returning[record_synch_count] = returning; 5162 record_synch_thread[record_synch_count] = thr_self(); 5163 record_synch_arg0ptr[record_synch_count] = &name; 5164 record_synch_count++; 5165 } 5166 // put more checking code here: 5167 // ... 5168 } 5169} 5170 5171void record_synch_enable() { 5172 // start collecting trace data, if not already doing so 5173 if (!record_synch_enabled) record_synch_count = 0; 5174 record_synch_enabled = true; 5175} 5176 5177void record_synch_disable() { 5178 // stop collecting trace data 5179 record_synch_enabled = false; 5180} 5181 5182#endif // INTERPOSE_ON_SYSTEM_SYNCH_FUNCTIONS 5183#endif // PRODUCT 5184 5185const intptr_t thr_time_off = (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5186const intptr_t thr_time_size = (intptr_t)(&((prusage_t *)(NULL))->pr_ttime) - 5187 (intptr_t)(&((prusage_t *)(NULL))->pr_utime); 5188 5189 5190// JVMTI & JVM monitoring and management support 5191// The thread_cpu_time() and current_thread_cpu_time() are only 5192// supported if is_thread_cpu_time_supported() returns true. 5193// They are not supported on Solaris T1. 5194 5195// current_thread_cpu_time(bool) and thread_cpu_time(Thread*, bool) 5196// are used by JVM M&M and JVMTI to get user+sys or user CPU time 5197// of a thread. 5198// 5199// current_thread_cpu_time() and thread_cpu_time(Thread *) 5200// returns the fast estimate available on the platform. 5201 5202// hrtime_t gethrvtime() return value includes 5203// user time but does not include system time 5204jlong os::current_thread_cpu_time() { 5205 return (jlong) gethrvtime(); 5206} 5207 5208jlong os::thread_cpu_time(Thread *thread) { 5209 // return user level CPU time only to be consistent with 5210 // what current_thread_cpu_time returns. 5211 // thread_cpu_time_info() must be changed if this changes 5212 return os::thread_cpu_time(thread, false /* user time only */); 5213} 5214 5215jlong os::current_thread_cpu_time(bool user_sys_cpu_time) { 5216 if (user_sys_cpu_time) { 5217 return os::thread_cpu_time(Thread::current(), user_sys_cpu_time); 5218 } else { 5219 return os::current_thread_cpu_time(); 5220 } 5221} 5222 5223jlong os::thread_cpu_time(Thread *thread, bool user_sys_cpu_time) { 5224 char proc_name[64]; 5225 int count; 5226 prusage_t prusage; 5227 jlong lwp_time; 5228 int fd; 5229 5230 sprintf(proc_name, "/proc/%d/lwp/%d/lwpusage", 5231 getpid(), 5232 thread->osthread()->lwp_id()); 5233 fd = ::open(proc_name, O_RDONLY); 5234 if (fd == -1) return -1; 5235 5236 do { 5237 count = ::pread(fd, 5238 (void *)&prusage.pr_utime, 5239 thr_time_size, 5240 thr_time_off); 5241 } while (count < 0 && errno == EINTR); 5242 ::close(fd); 5243 if (count < 0) return -1; 5244 5245 if (user_sys_cpu_time) { 5246 // user + system CPU time 5247 lwp_time = (((jlong)prusage.pr_stime.tv_sec + 5248 (jlong)prusage.pr_utime.tv_sec) * (jlong)1000000000) + 5249 (jlong)prusage.pr_stime.tv_nsec + 5250 (jlong)prusage.pr_utime.tv_nsec; 5251 } else { 5252 // user level CPU time only 5253 lwp_time = ((jlong)prusage.pr_utime.tv_sec * (jlong)1000000000) + 5254 (jlong)prusage.pr_utime.tv_nsec; 5255 } 5256 5257 return (lwp_time); 5258} 5259 5260void os::current_thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5261 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5262 info_ptr->may_skip_backward = false; // elapsed time not wall time 5263 info_ptr->may_skip_forward = false; // elapsed time not wall time 5264 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5265} 5266 5267void os::thread_cpu_time_info(jvmtiTimerInfo *info_ptr) { 5268 info_ptr->max_value = ALL_64_BITS; // will not wrap in less than 64 bits 5269 info_ptr->may_skip_backward = false; // elapsed time not wall time 5270 info_ptr->may_skip_forward = false; // elapsed time not wall time 5271 info_ptr->kind = JVMTI_TIMER_USER_CPU; // only user time is returned 5272} 5273 5274bool os::is_thread_cpu_time_supported() { 5275 return true; 5276} 5277 5278// System loadavg support. Returns -1 if load average cannot be obtained. 5279// Return the load average for our processor set if the primitive exists 5280// (Solaris 9 and later). Otherwise just return system wide loadavg. 5281int os::loadavg(double loadavg[], int nelem) { 5282 if (pset_getloadavg_ptr != NULL) { 5283 return (*pset_getloadavg_ptr)(PS_MYID, loadavg, nelem); 5284 } else { 5285 return ::getloadavg(loadavg, nelem); 5286 } 5287} 5288 5289//--------------------------------------------------------------------------------- 5290 5291bool os::find(address addr, outputStream* st) { 5292 Dl_info dlinfo; 5293 memset(&dlinfo, 0, sizeof(dlinfo)); 5294 if (dladdr(addr, &dlinfo) != 0) { 5295 st->print(PTR_FORMAT ": ", addr); 5296 if (dlinfo.dli_sname != NULL && dlinfo.dli_saddr != NULL) { 5297 st->print("%s+%#lx", dlinfo.dli_sname, addr-(intptr_t)dlinfo.dli_saddr); 5298 } else if (dlinfo.dli_fbase != NULL) { 5299 st->print("<offset %#lx>", addr-(intptr_t)dlinfo.dli_fbase); 5300 } else { 5301 st->print("<absolute address>"); 5302 } 5303 if (dlinfo.dli_fname != NULL) { 5304 st->print(" in %s", dlinfo.dli_fname); 5305 } 5306 if (dlinfo.dli_fbase != NULL) { 5307 st->print(" at " PTR_FORMAT, dlinfo.dli_fbase); 5308 } 5309 st->cr(); 5310 5311 if (Verbose) { 5312 // decode some bytes around the PC 5313 address begin = clamp_address_in_page(addr-40, addr, os::vm_page_size()); 5314 address end = clamp_address_in_page(addr+40, addr, os::vm_page_size()); 5315 address lowest = (address) dlinfo.dli_sname; 5316 if (!lowest) lowest = (address) dlinfo.dli_fbase; 5317 if (begin < lowest) begin = lowest; 5318 Dl_info dlinfo2; 5319 if (dladdr(end, &dlinfo2) != 0 && dlinfo2.dli_saddr != dlinfo.dli_saddr 5320 && end > dlinfo2.dli_saddr && dlinfo2.dli_saddr > begin) { 5321 end = (address) dlinfo2.dli_saddr; 5322 } 5323 Disassembler::decode(begin, end, st); 5324 } 5325 return true; 5326 } 5327 return false; 5328} 5329 5330// Following function has been added to support HotSparc's libjvm.so running 5331// under Solaris production JDK 1.2.2 / 1.3.0. These came from 5332// src/solaris/hpi/native_threads in the EVM codebase. 5333// 5334// NOTE: This is no longer needed in the 1.3.1 and 1.4 production release 5335// libraries and should thus be removed. We will leave it behind for a while 5336// until we no longer want to able to run on top of 1.3.0 Solaris production 5337// JDK. See 4341971. 5338 5339#define STACK_SLACK 0x800 5340 5341extern "C" { 5342 intptr_t sysThreadAvailableStackWithSlack() { 5343 stack_t st; 5344 intptr_t retval, stack_top; 5345 retval = thr_stksegment(&st); 5346 assert(retval == 0, "incorrect return value from thr_stksegment"); 5347 assert((address)&st < (address)st.ss_sp, "Invalid stack base returned"); 5348 assert((address)&st > (address)st.ss_sp-st.ss_size, "Invalid stack size returned"); 5349 stack_top=(intptr_t)st.ss_sp-st.ss_size; 5350 return ((intptr_t)&stack_top - stack_top - STACK_SLACK); 5351 } 5352} 5353 5354// ObjectMonitor park-unpark infrastructure ... 5355// 5356// We implement Solaris and Linux PlatformEvents with the 5357// obvious condvar-mutex-flag triple. 5358// Another alternative that works quite well is pipes: 5359// Each PlatformEvent consists of a pipe-pair. 5360// The thread associated with the PlatformEvent 5361// calls park(), which reads from the input end of the pipe. 5362// Unpark() writes into the other end of the pipe. 5363// The write-side of the pipe must be set NDELAY. 5364// Unfortunately pipes consume a large # of handles. 5365// Native solaris lwp_park() and lwp_unpark() work nicely, too. 5366// Using pipes for the 1st few threads might be workable, however. 5367// 5368// park() is permitted to return spuriously. 5369// Callers of park() should wrap the call to park() in 5370// an appropriate loop. A litmus test for the correct 5371// usage of park is the following: if park() were modified 5372// to immediately return 0 your code should still work, 5373// albeit degenerating to a spin loop. 5374// 5375// In a sense, park()-unpark() just provides more polite spinning 5376// and polling with the key difference over naive spinning being 5377// that a parked thread needs to be explicitly unparked() in order 5378// to wake up and to poll the underlying condition. 5379// 5380// Assumption: 5381// Only one parker can exist on an event, which is why we allocate 5382// them per-thread. Multiple unparkers can coexist. 5383// 5384// _Event transitions in park() 5385// -1 => -1 : illegal 5386// 1 => 0 : pass - return immediately 5387// 0 => -1 : block; then set _Event to 0 before returning 5388// 5389// _Event transitions in unpark() 5390// 0 => 1 : just return 5391// 1 => 1 : just return 5392// -1 => either 0 or 1; must signal target thread 5393// That is, we can safely transition _Event from -1 to either 5394// 0 or 1. 5395// 5396// _Event serves as a restricted-range semaphore. 5397// -1 : thread is blocked, i.e. there is a waiter 5398// 0 : neutral: thread is running or ready, 5399// could have been signaled after a wait started 5400// 1 : signaled - thread is running or ready 5401// 5402// Another possible encoding of _Event would be with 5403// explicit "PARKED" == 01b and "SIGNALED" == 10b bits. 5404// 5405// TODO-FIXME: add DTRACE probes for: 5406// 1. Tx parks 5407// 2. Ty unparks Tx 5408// 3. Tx resumes from park 5409 5410 5411// value determined through experimentation 5412#define ROUNDINGFIX 11 5413 5414// utility to compute the abstime argument to timedwait. 5415// TODO-FIXME: switch from compute_abstime() to unpackTime(). 5416 5417static timestruc_t* compute_abstime(timestruc_t* abstime, jlong millis) { 5418 // millis is the relative timeout time 5419 // abstime will be the absolute timeout time 5420 if (millis < 0) millis = 0; 5421 struct timeval now; 5422 int status = gettimeofday(&now, NULL); 5423 assert(status == 0, "gettimeofday"); 5424 jlong seconds = millis / 1000; 5425 jlong max_wait_period; 5426 5427 if (UseLWPSynchronization) { 5428 // forward port of fix for 4275818 (not sleeping long enough) 5429 // There was a bug in Solaris 6, 7 and pre-patch 5 of 8 where 5430 // _lwp_cond_timedwait() used a round_down algorithm rather 5431 // than a round_up. For millis less than our roundfactor 5432 // it rounded down to 0 which doesn't meet the spec. 5433 // For millis > roundfactor we may return a bit sooner, but 5434 // since we can not accurately identify the patch level and 5435 // this has already been fixed in Solaris 9 and 8 we will 5436 // leave it alone rather than always rounding down. 5437 5438 if (millis > 0 && millis < ROUNDINGFIX) millis = ROUNDINGFIX; 5439 // It appears that when we go directly through Solaris _lwp_cond_timedwait() 5440 // the acceptable max time threshold is smaller than for libthread on 2.5.1 and 2.6 5441 max_wait_period = 21000000; 5442 } else { 5443 max_wait_period = 50000000; 5444 } 5445 millis %= 1000; 5446 if (seconds > max_wait_period) { // see man cond_timedwait(3T) 5447 seconds = max_wait_period; 5448 } 5449 abstime->tv_sec = now.tv_sec + seconds; 5450 long usec = now.tv_usec + millis * 1000; 5451 if (usec >= 1000000) { 5452 abstime->tv_sec += 1; 5453 usec -= 1000000; 5454 } 5455 abstime->tv_nsec = usec * 1000; 5456 return abstime; 5457} 5458 5459void os::PlatformEvent::park() { // AKA: down() 5460 // Transitions for _Event: 5461 // -1 => -1 : illegal 5462 // 1 => 0 : pass - return immediately 5463 // 0 => -1 : block; then set _Event to 0 before returning 5464 5465 // Invariant: Only the thread associated with the Event/PlatformEvent 5466 // may call park(). 5467 assert(_nParked == 0, "invariant"); 5468 5469 int v; 5470 for (;;) { 5471 v = _Event; 5472 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5473 } 5474 guarantee(v >= 0, "invariant"); 5475 if (v == 0) { 5476 // Do this the hard way by blocking ... 5477 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5478 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5479 // Only for SPARC >= V8PlusA 5480#if defined(__sparc) && defined(COMPILER2) 5481 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5482#endif 5483 int status = os::Solaris::mutex_lock(_mutex); 5484 assert_status(status == 0, status, "mutex_lock"); 5485 guarantee(_nParked == 0, "invariant"); 5486 ++_nParked; 5487 while (_Event < 0) { 5488 // for some reason, under 2.7 lwp_cond_wait() may return ETIME ... 5489 // Treat this the same as if the wait was interrupted 5490 // With usr/lib/lwp going to kernel, always handle ETIME 5491 status = os::Solaris::cond_wait(_cond, _mutex); 5492 if (status == ETIME) status = EINTR; 5493 assert_status(status == 0 || status == EINTR, status, "cond_wait"); 5494 } 5495 --_nParked; 5496 _Event = 0; 5497 status = os::Solaris::mutex_unlock(_mutex); 5498 assert_status(status == 0, status, "mutex_unlock"); 5499 // Paranoia to ensure our locked and lock-free paths interact 5500 // correctly with each other. 5501 OrderAccess::fence(); 5502 } 5503} 5504 5505int os::PlatformEvent::park(jlong millis) { 5506 // Transitions for _Event: 5507 // -1 => -1 : illegal 5508 // 1 => 0 : pass - return immediately 5509 // 0 => -1 : block; then set _Event to 0 before returning 5510 5511 guarantee(_nParked == 0, "invariant"); 5512 int v; 5513 for (;;) { 5514 v = _Event; 5515 if (Atomic::cmpxchg(v-1, &_Event, v) == v) break; 5516 } 5517 guarantee(v >= 0, "invariant"); 5518 if (v != 0) return OS_OK; 5519 5520 int ret = OS_TIMEOUT; 5521 timestruc_t abst; 5522 compute_abstime(&abst, millis); 5523 5524 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5525 // For Solaris SPARC set fprs.FEF=0 prior to parking. 5526 // Only for SPARC >= V8PlusA 5527#if defined(__sparc) && defined(COMPILER2) 5528 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5529#endif 5530 int status = os::Solaris::mutex_lock(_mutex); 5531 assert_status(status == 0, status, "mutex_lock"); 5532 guarantee(_nParked == 0, "invariant"); 5533 ++_nParked; 5534 while (_Event < 0) { 5535 int status = os::Solaris::cond_timedwait(_cond, _mutex, &abst); 5536 assert_status(status == 0 || status == EINTR || 5537 status == ETIME || status == ETIMEDOUT, 5538 status, "cond_timedwait"); 5539 if (!FilterSpuriousWakeups) break; // previous semantics 5540 if (status == ETIME || status == ETIMEDOUT) break; 5541 // We consume and ignore EINTR and spurious wakeups. 5542 } 5543 --_nParked; 5544 if (_Event >= 0) ret = OS_OK; 5545 _Event = 0; 5546 status = os::Solaris::mutex_unlock(_mutex); 5547 assert_status(status == 0, status, "mutex_unlock"); 5548 // Paranoia to ensure our locked and lock-free paths interact 5549 // correctly with each other. 5550 OrderAccess::fence(); 5551 return ret; 5552} 5553 5554void os::PlatformEvent::unpark() { 5555 // Transitions for _Event: 5556 // 0 => 1 : just return 5557 // 1 => 1 : just return 5558 // -1 => either 0 or 1; must signal target thread 5559 // That is, we can safely transition _Event from -1 to either 5560 // 0 or 1. 5561 // See also: "Semaphores in Plan 9" by Mullender & Cox 5562 // 5563 // Note: Forcing a transition from "-1" to "1" on an unpark() means 5564 // that it will take two back-to-back park() calls for the owning 5565 // thread to block. This has the benefit of forcing a spurious return 5566 // from the first park() call after an unpark() call which will help 5567 // shake out uses of park() and unpark() without condition variables. 5568 5569 if (Atomic::xchg(1, &_Event) >= 0) return; 5570 5571 // If the thread associated with the event was parked, wake it. 5572 // Wait for the thread assoc with the PlatformEvent to vacate. 5573 int status = os::Solaris::mutex_lock(_mutex); 5574 assert_status(status == 0, status, "mutex_lock"); 5575 int AnyWaiters = _nParked; 5576 status = os::Solaris::mutex_unlock(_mutex); 5577 assert_status(status == 0, status, "mutex_unlock"); 5578 guarantee(AnyWaiters == 0 || AnyWaiters == 1, "invariant"); 5579 if (AnyWaiters != 0) { 5580 // Note that we signal() *after* dropping the lock for "immortal" Events. 5581 // This is safe and avoids a common class of futile wakeups. In rare 5582 // circumstances this can cause a thread to return prematurely from 5583 // cond_{timed}wait() but the spurious wakeup is benign and the victim 5584 // will simply re-test the condition and re-park itself. 5585 // This provides particular benefit if the underlying platform does not 5586 // provide wait morphing. 5587 status = os::Solaris::cond_signal(_cond); 5588 assert_status(status == 0, status, "cond_signal"); 5589 } 5590} 5591 5592// JSR166 5593// ------------------------------------------------------- 5594 5595// The solaris and linux implementations of park/unpark are fairly 5596// conservative for now, but can be improved. They currently use a 5597// mutex/condvar pair, plus _counter. 5598// Park decrements _counter if > 0, else does a condvar wait. Unpark 5599// sets count to 1 and signals condvar. Only one thread ever waits 5600// on the condvar. Contention seen when trying to park implies that someone 5601// is unparking you, so don't wait. And spurious returns are fine, so there 5602// is no need to track notifications. 5603 5604#define MAX_SECS 100000000 5605 5606// This code is common to linux and solaris and will be moved to a 5607// common place in dolphin. 5608// 5609// The passed in time value is either a relative time in nanoseconds 5610// or an absolute time in milliseconds. Either way it has to be unpacked 5611// into suitable seconds and nanoseconds components and stored in the 5612// given timespec structure. 5613// Given time is a 64-bit value and the time_t used in the timespec is only 5614// a signed-32-bit value (except on 64-bit Linux) we have to watch for 5615// overflow if times way in the future are given. Further on Solaris versions 5616// prior to 10 there is a restriction (see cond_timedwait) that the specified 5617// number of seconds, in abstime, is less than current_time + 100,000,000. 5618// As it will be 28 years before "now + 100000000" will overflow we can 5619// ignore overflow and just impose a hard-limit on seconds using the value 5620// of "now + 100,000,000". This places a limit on the timeout of about 3.17 5621// years from "now". 5622// 5623static void unpackTime(timespec* absTime, bool isAbsolute, jlong time) { 5624 assert(time > 0, "convertTime"); 5625 5626 struct timeval now; 5627 int status = gettimeofday(&now, NULL); 5628 assert(status == 0, "gettimeofday"); 5629 5630 time_t max_secs = now.tv_sec + MAX_SECS; 5631 5632 if (isAbsolute) { 5633 jlong secs = time / 1000; 5634 if (secs > max_secs) { 5635 absTime->tv_sec = max_secs; 5636 } else { 5637 absTime->tv_sec = secs; 5638 } 5639 absTime->tv_nsec = (time % 1000) * NANOSECS_PER_MILLISEC; 5640 } else { 5641 jlong secs = time / NANOSECS_PER_SEC; 5642 if (secs >= MAX_SECS) { 5643 absTime->tv_sec = max_secs; 5644 absTime->tv_nsec = 0; 5645 } else { 5646 absTime->tv_sec = now.tv_sec + secs; 5647 absTime->tv_nsec = (time % NANOSECS_PER_SEC) + now.tv_usec*1000; 5648 if (absTime->tv_nsec >= NANOSECS_PER_SEC) { 5649 absTime->tv_nsec -= NANOSECS_PER_SEC; 5650 ++absTime->tv_sec; // note: this must be <= max_secs 5651 } 5652 } 5653 } 5654 assert(absTime->tv_sec >= 0, "tv_sec < 0"); 5655 assert(absTime->tv_sec <= max_secs, "tv_sec > max_secs"); 5656 assert(absTime->tv_nsec >= 0, "tv_nsec < 0"); 5657 assert(absTime->tv_nsec < NANOSECS_PER_SEC, "tv_nsec >= nanos_per_sec"); 5658} 5659 5660void Parker::park(bool isAbsolute, jlong time) { 5661 // Ideally we'd do something useful while spinning, such 5662 // as calling unpackTime(). 5663 5664 // Optional fast-path check: 5665 // Return immediately if a permit is available. 5666 // We depend on Atomic::xchg() having full barrier semantics 5667 // since we are doing a lock-free update to _counter. 5668 if (Atomic::xchg(0, &_counter) > 0) return; 5669 5670 // Optional fast-exit: Check interrupt before trying to wait 5671 Thread* thread = Thread::current(); 5672 assert(thread->is_Java_thread(), "Must be JavaThread"); 5673 JavaThread *jt = (JavaThread *)thread; 5674 if (Thread::is_interrupted(thread, false)) { 5675 return; 5676 } 5677 5678 // First, demultiplex/decode time arguments 5679 timespec absTime; 5680 if (time < 0 || (isAbsolute && time == 0)) { // don't wait at all 5681 return; 5682 } 5683 if (time > 0) { 5684 // Warning: this code might be exposed to the old Solaris time 5685 // round-down bugs. Grep "roundingFix" for details. 5686 unpackTime(&absTime, isAbsolute, time); 5687 } 5688 5689 // Enter safepoint region 5690 // Beware of deadlocks such as 6317397. 5691 // The per-thread Parker:: _mutex is a classic leaf-lock. 5692 // In particular a thread must never block on the Threads_lock while 5693 // holding the Parker:: mutex. If safepoints are pending both the 5694 // the ThreadBlockInVM() CTOR and DTOR may grab Threads_lock. 5695 ThreadBlockInVM tbivm(jt); 5696 5697 // Don't wait if cannot get lock since interference arises from 5698 // unblocking. Also. check interrupt before trying wait 5699 if (Thread::is_interrupted(thread, false) || 5700 os::Solaris::mutex_trylock(_mutex) != 0) { 5701 return; 5702 } 5703 5704 int status; 5705 5706 if (_counter > 0) { // no wait needed 5707 _counter = 0; 5708 status = os::Solaris::mutex_unlock(_mutex); 5709 assert(status == 0, "invariant"); 5710 // Paranoia to ensure our locked and lock-free paths interact 5711 // correctly with each other and Java-level accesses. 5712 OrderAccess::fence(); 5713 return; 5714 } 5715 5716#ifdef ASSERT 5717 // Don't catch signals while blocked; let the running threads have the signals. 5718 // (This allows a debugger to break into the running thread.) 5719 sigset_t oldsigs; 5720 sigset_t* allowdebug_blocked = os::Solaris::allowdebug_blocked_signals(); 5721 thr_sigsetmask(SIG_BLOCK, allowdebug_blocked, &oldsigs); 5722#endif 5723 5724 OSThreadWaitState osts(thread->osthread(), false /* not Object.wait() */); 5725 jt->set_suspend_equivalent(); 5726 // cleared by handle_special_suspend_equivalent_condition() or java_suspend_self() 5727 5728 // Do this the hard way by blocking ... 5729 // See http://monaco.sfbay/detail.jsf?cr=5094058. 5730 // TODO-FIXME: for Solaris SPARC set fprs.FEF=0 prior to parking. 5731 // Only for SPARC >= V8PlusA 5732#if defined(__sparc) && defined(COMPILER2) 5733 if (ClearFPUAtPark) { _mark_fpu_nosave(); } 5734#endif 5735 5736 if (time == 0) { 5737 status = os::Solaris::cond_wait(_cond, _mutex); 5738 } else { 5739 status = os::Solaris::cond_timedwait (_cond, _mutex, &absTime); 5740 } 5741 // Note that an untimed cond_wait() can sometimes return ETIME on older 5742 // versions of the Solaris. 5743 assert_status(status == 0 || status == EINTR || 5744 status == ETIME || status == ETIMEDOUT, 5745 status, "cond_timedwait"); 5746 5747#ifdef ASSERT 5748 thr_sigsetmask(SIG_SETMASK, &oldsigs, NULL); 5749#endif 5750 _counter = 0; 5751 status = os::Solaris::mutex_unlock(_mutex); 5752 assert_status(status == 0, status, "mutex_unlock"); 5753 // Paranoia to ensure our locked and lock-free paths interact 5754 // correctly with each other and Java-level accesses. 5755 OrderAccess::fence(); 5756 5757 // If externally suspended while waiting, re-suspend 5758 if (jt->handle_special_suspend_equivalent_condition()) { 5759 jt->java_suspend_self(); 5760 } 5761} 5762 5763void Parker::unpark() { 5764 int status = os::Solaris::mutex_lock(_mutex); 5765 assert(status == 0, "invariant"); 5766 const int s = _counter; 5767 _counter = 1; 5768 status = os::Solaris::mutex_unlock(_mutex); 5769 assert(status == 0, "invariant"); 5770 5771 if (s < 1) { 5772 status = os::Solaris::cond_signal(_cond); 5773 assert(status == 0, "invariant"); 5774 } 5775} 5776 5777extern char** environ; 5778 5779// Run the specified command in a separate process. Return its exit value, 5780// or -1 on failure (e.g. can't fork a new process). 5781// Unlike system(), this function can be called from signal handler. It 5782// doesn't block SIGINT et al. 5783int os::fork_and_exec(char* cmd) { 5784 char * argv[4]; 5785 argv[0] = (char *)"sh"; 5786 argv[1] = (char *)"-c"; 5787 argv[2] = cmd; 5788 argv[3] = NULL; 5789 5790 // fork is async-safe, fork1 is not so can't use in signal handler 5791 pid_t pid; 5792 Thread* t = ThreadLocalStorage::get_thread_slow(); 5793 if (t != NULL && t->is_inside_signal_handler()) { 5794 pid = fork(); 5795 } else { 5796 pid = fork1(); 5797 } 5798 5799 if (pid < 0) { 5800 // fork failed 5801 warning("fork failed: %s", strerror(errno)); 5802 return -1; 5803 5804 } else if (pid == 0) { 5805 // child process 5806 5807 // try to be consistent with system(), which uses "/usr/bin/sh" on Solaris 5808 execve("/usr/bin/sh", argv, environ); 5809 5810 // execve failed 5811 _exit(-1); 5812 5813 } else { 5814 // copied from J2SE ..._waitForProcessExit() in UNIXProcess_md.c; we don't 5815 // care about the actual exit code, for now. 5816 5817 int status; 5818 5819 // Wait for the child process to exit. This returns immediately if 5820 // the child has already exited. */ 5821 while (waitpid(pid, &status, 0) < 0) { 5822 switch (errno) { 5823 case ECHILD: return 0; 5824 case EINTR: break; 5825 default: return -1; 5826 } 5827 } 5828 5829 if (WIFEXITED(status)) { 5830 // The child exited normally; get its exit code. 5831 return WEXITSTATUS(status); 5832 } else if (WIFSIGNALED(status)) { 5833 // The child exited because of a signal 5834 // The best value to return is 0x80 + signal number, 5835 // because that is what all Unix shells do, and because 5836 // it allows callers to distinguish between process exit and 5837 // process death by signal. 5838 return 0x80 + WTERMSIG(status); 5839 } else { 5840 // Unknown exit code; pass it through 5841 return status; 5842 } 5843 } 5844} 5845 5846// is_headless_jre() 5847// 5848// Test for the existence of xawt/libmawt.so or libawt_xawt.so 5849// in order to report if we are running in a headless jre 5850// 5851// Since JDK8 xawt/libmawt.so was moved into the same directory 5852// as libawt.so, and renamed libawt_xawt.so 5853// 5854bool os::is_headless_jre() { 5855 struct stat statbuf; 5856 char buf[MAXPATHLEN]; 5857 char libmawtpath[MAXPATHLEN]; 5858 const char *xawtstr = "/xawt/libmawt.so"; 5859 const char *new_xawtstr = "/libawt_xawt.so"; 5860 char *p; 5861 5862 // Get path to libjvm.so 5863 os::jvm_path(buf, sizeof(buf)); 5864 5865 // Get rid of libjvm.so 5866 p = strrchr(buf, '/'); 5867 if (p == NULL) { 5868 return false; 5869 } else { 5870 *p = '\0'; 5871 } 5872 5873 // Get rid of client or server 5874 p = strrchr(buf, '/'); 5875 if (p == NULL) { 5876 return false; 5877 } else { 5878 *p = '\0'; 5879 } 5880 5881 // check xawt/libmawt.so 5882 strcpy(libmawtpath, buf); 5883 strcat(libmawtpath, xawtstr); 5884 if (::stat(libmawtpath, &statbuf) == 0) return false; 5885 5886 // check libawt_xawt.so 5887 strcpy(libmawtpath, buf); 5888 strcat(libmawtpath, new_xawtstr); 5889 if (::stat(libmawtpath, &statbuf) == 0) return false; 5890 5891 return true; 5892} 5893 5894size_t os::write(int fd, const void *buf, unsigned int nBytes) { 5895 size_t res; 5896 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5897 "Assumed _thread_in_native"); 5898 RESTARTABLE((size_t) ::write(fd, buf, (size_t) nBytes), res); 5899 return res; 5900} 5901 5902int os::close(int fd) { 5903 return ::close(fd); 5904} 5905 5906int os::socket_close(int fd) { 5907 return ::close(fd); 5908} 5909 5910int os::recv(int fd, char* buf, size_t nBytes, uint flags) { 5911 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5912 "Assumed _thread_in_native"); 5913 RESTARTABLE_RETURN_INT((int)::recv(fd, buf, nBytes, flags)); 5914} 5915 5916int os::send(int fd, char* buf, size_t nBytes, uint flags) { 5917 assert(((JavaThread*)Thread::current())->thread_state() == _thread_in_native, 5918 "Assumed _thread_in_native"); 5919 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5920} 5921 5922int os::raw_send(int fd, char* buf, size_t nBytes, uint flags) { 5923 RESTARTABLE_RETURN_INT((int)::send(fd, buf, nBytes, flags)); 5924} 5925 5926// As both poll and select can be interrupted by signals, we have to be 5927// prepared to restart the system call after updating the timeout, unless 5928// a poll() is done with timeout == -1, in which case we repeat with this 5929// "wait forever" value. 5930 5931int os::connect(int fd, struct sockaddr *him, socklen_t len) { 5932 int _result; 5933 _result = ::connect(fd, him, len); 5934 5935 // On Solaris, when a connect() call is interrupted, the connection 5936 // can be established asynchronously (see 6343810). Subsequent calls 5937 // to connect() must check the errno value which has the semantic 5938 // described below (copied from the connect() man page). Handling 5939 // of asynchronously established connections is required for both 5940 // blocking and non-blocking sockets. 5941 // EINTR The connection attempt was interrupted 5942 // before any data arrived by the delivery of 5943 // a signal. The connection, however, will be 5944 // established asynchronously. 5945 // 5946 // EINPROGRESS The socket is non-blocking, and the connec- 5947 // tion cannot be completed immediately. 5948 // 5949 // EALREADY The socket is non-blocking, and a previous 5950 // connection attempt has not yet been com- 5951 // pleted. 5952 // 5953 // EISCONN The socket is already connected. 5954 if (_result == OS_ERR && errno == EINTR) { 5955 // restarting a connect() changes its errno semantics 5956 RESTARTABLE(::connect(fd, him, len), _result); 5957 // undo these changes 5958 if (_result == OS_ERR) { 5959 if (errno == EALREADY) { 5960 errno = EINPROGRESS; // fall through 5961 } else if (errno == EISCONN) { 5962 errno = 0; 5963 return OS_OK; 5964 } 5965 } 5966 } 5967 return _result; 5968} 5969 5970// Get the default path to the core file 5971// Returns the length of the string 5972int os::get_core_path(char* buffer, size_t bufferSize) { 5973 const char* p = get_current_directory(buffer, bufferSize); 5974 5975 if (p == NULL) { 5976 assert(p != NULL, "failed to get current directory"); 5977 return 0; 5978 } 5979 5980 return strlen(buffer); 5981} 5982 5983#ifndef PRODUCT 5984void TestReserveMemorySpecial_test() { 5985 // No tests available for this platform 5986} 5987#endif 5988